Commit | Line | Data |
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1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-core.c - helper library for ATA |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from http://www.t13.org/ and | |
31 | * http://www.sata-io.org/ | |
32 | * | |
92c52c52 AC |
33 | * Standards documents from: |
34 | * http://www.t13.org (ATA standards, PCI DMA IDE spec) | |
35 | * http://www.t10.org (SCSI MMC - for ATAPI MMC) | |
36 | * http://www.sata-io.org (SATA) | |
37 | * http://www.compactflash.org (CF) | |
38 | * http://www.qic.org (QIC157 - Tape and DSC) | |
39 | * http://www.ce-ata.org (CE-ATA: not supported) | |
40 | * | |
1da177e4 LT |
41 | */ |
42 | ||
1da177e4 LT |
43 | #include <linux/kernel.h> |
44 | #include <linux/module.h> | |
45 | #include <linux/pci.h> | |
46 | #include <linux/init.h> | |
47 | #include <linux/list.h> | |
48 | #include <linux/mm.h> | |
49 | #include <linux/highmem.h> | |
50 | #include <linux/spinlock.h> | |
51 | #include <linux/blkdev.h> | |
52 | #include <linux/delay.h> | |
53 | #include <linux/timer.h> | |
54 | #include <linux/interrupt.h> | |
55 | #include <linux/completion.h> | |
56 | #include <linux/suspend.h> | |
57 | #include <linux/workqueue.h> | |
67846b30 | 58 | #include <linux/jiffies.h> |
378f058c | 59 | #include <linux/scatterlist.h> |
2dcb407e | 60 | #include <linux/io.h> |
1da177e4 | 61 | #include <scsi/scsi.h> |
193515d5 | 62 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
63 | #include <scsi/scsi_host.h> |
64 | #include <linux/libata.h> | |
1da177e4 LT |
65 | #include <asm/semaphore.h> |
66 | #include <asm/byteorder.h> | |
140b5e59 | 67 | #include <linux/cdrom.h> |
1da177e4 LT |
68 | |
69 | #include "libata.h" | |
70 | ||
fda0efc5 | 71 | |
d7bb4cc7 | 72 | /* debounce timing parameters in msecs { interval, duration, timeout } */ |
e9c83914 TH |
73 | const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; |
74 | const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; | |
75 | const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; | |
d7bb4cc7 | 76 | |
3373efd8 TH |
77 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
78 | u16 heads, u16 sectors); | |
79 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev); | |
218f3d30 JG |
80 | static unsigned int ata_dev_set_feature(struct ata_device *dev, |
81 | u8 enable, u8 feature); | |
3373efd8 | 82 | static void ata_dev_xfermask(struct ata_device *dev); |
75683fe7 | 83 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev); |
1da177e4 | 84 | |
f3187195 | 85 | unsigned int ata_print_id = 1; |
1da177e4 LT |
86 | static struct workqueue_struct *ata_wq; |
87 | ||
453b07ac TH |
88 | struct workqueue_struct *ata_aux_wq; |
89 | ||
33267325 TH |
90 | struct ata_force_param { |
91 | const char *name; | |
92 | unsigned int cbl; | |
93 | int spd_limit; | |
94 | unsigned long xfer_mask; | |
95 | unsigned int horkage_on; | |
96 | unsigned int horkage_off; | |
97 | }; | |
98 | ||
99 | struct ata_force_ent { | |
100 | int port; | |
101 | int device; | |
102 | struct ata_force_param param; | |
103 | }; | |
104 | ||
105 | static struct ata_force_ent *ata_force_tbl; | |
106 | static int ata_force_tbl_size; | |
107 | ||
108 | static char ata_force_param_buf[PAGE_SIZE] __initdata; | |
7afb4222 TH |
109 | /* param_buf is thrown away after initialization, disallow read */ |
110 | module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); | |
33267325 TH |
111 | MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)"); |
112 | ||
418dc1f5 | 113 | int atapi_enabled = 1; |
1623c81e JG |
114 | module_param(atapi_enabled, int, 0444); |
115 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); | |
116 | ||
c5c61bda | 117 | static int atapi_dmadir = 0; |
95de719a AL |
118 | module_param(atapi_dmadir, int, 0444); |
119 | MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); | |
120 | ||
baf4fdfa ML |
121 | int atapi_passthru16 = 1; |
122 | module_param(atapi_passthru16, int, 0444); | |
123 | MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)"); | |
124 | ||
c3c013a2 JG |
125 | int libata_fua = 0; |
126 | module_param_named(fua, libata_fua, int, 0444); | |
127 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); | |
128 | ||
2dcb407e | 129 | static int ata_ignore_hpa; |
1e999736 AC |
130 | module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); |
131 | MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); | |
132 | ||
b3a70601 AC |
133 | static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; |
134 | module_param_named(dma, libata_dma_mask, int, 0444); | |
135 | MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); | |
136 | ||
a8601e5f AM |
137 | static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; |
138 | module_param(ata_probe_timeout, int, 0444); | |
139 | MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); | |
140 | ||
6ebe9d86 | 141 | int libata_noacpi = 0; |
d7d0dad6 | 142 | module_param_named(noacpi, libata_noacpi, int, 0444); |
6ebe9d86 | 143 | MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set"); |
11ef697b | 144 | |
ae8d4ee7 AC |
145 | int libata_allow_tpm = 0; |
146 | module_param_named(allow_tpm, libata_allow_tpm, int, 0444); | |
147 | MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands"); | |
148 | ||
1da177e4 LT |
149 | MODULE_AUTHOR("Jeff Garzik"); |
150 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
151 | MODULE_LICENSE("GPL"); | |
152 | MODULE_VERSION(DRV_VERSION); | |
153 | ||
0baab86b | 154 | |
33267325 TH |
155 | /** |
156 | * ata_force_cbl - force cable type according to libata.force | |
4cdfa1b3 | 157 | * @ap: ATA port of interest |
33267325 TH |
158 | * |
159 | * Force cable type according to libata.force and whine about it. | |
160 | * The last entry which has matching port number is used, so it | |
161 | * can be specified as part of device force parameters. For | |
162 | * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the | |
163 | * same effect. | |
164 | * | |
165 | * LOCKING: | |
166 | * EH context. | |
167 | */ | |
168 | void ata_force_cbl(struct ata_port *ap) | |
169 | { | |
170 | int i; | |
171 | ||
172 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
173 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
174 | ||
175 | if (fe->port != -1 && fe->port != ap->print_id) | |
176 | continue; | |
177 | ||
178 | if (fe->param.cbl == ATA_CBL_NONE) | |
179 | continue; | |
180 | ||
181 | ap->cbl = fe->param.cbl; | |
182 | ata_port_printk(ap, KERN_NOTICE, | |
183 | "FORCE: cable set to %s\n", fe->param.name); | |
184 | return; | |
185 | } | |
186 | } | |
187 | ||
188 | /** | |
189 | * ata_force_spd_limit - force SATA spd limit according to libata.force | |
190 | * @link: ATA link of interest | |
191 | * | |
192 | * Force SATA spd limit according to libata.force and whine about | |
193 | * it. When only the port part is specified (e.g. 1:), the limit | |
194 | * applies to all links connected to both the host link and all | |
195 | * fan-out ports connected via PMP. If the device part is | |
196 | * specified as 0 (e.g. 1.00:), it specifies the first fan-out | |
197 | * link not the host link. Device number 15 always points to the | |
198 | * host link whether PMP is attached or not. | |
199 | * | |
200 | * LOCKING: | |
201 | * EH context. | |
202 | */ | |
203 | static void ata_force_spd_limit(struct ata_link *link) | |
204 | { | |
205 | int linkno, i; | |
206 | ||
207 | if (ata_is_host_link(link)) | |
208 | linkno = 15; | |
209 | else | |
210 | linkno = link->pmp; | |
211 | ||
212 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
213 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
214 | ||
215 | if (fe->port != -1 && fe->port != link->ap->print_id) | |
216 | continue; | |
217 | ||
218 | if (fe->device != -1 && fe->device != linkno) | |
219 | continue; | |
220 | ||
221 | if (!fe->param.spd_limit) | |
222 | continue; | |
223 | ||
224 | link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; | |
225 | ata_link_printk(link, KERN_NOTICE, | |
226 | "FORCE: PHY spd limit set to %s\n", fe->param.name); | |
227 | return; | |
228 | } | |
229 | } | |
230 | ||
231 | /** | |
232 | * ata_force_xfermask - force xfermask according to libata.force | |
233 | * @dev: ATA device of interest | |
234 | * | |
235 | * Force xfer_mask according to libata.force and whine about it. | |
236 | * For consistency with link selection, device number 15 selects | |
237 | * the first device connected to the host link. | |
238 | * | |
239 | * LOCKING: | |
240 | * EH context. | |
241 | */ | |
242 | static void ata_force_xfermask(struct ata_device *dev) | |
243 | { | |
244 | int devno = dev->link->pmp + dev->devno; | |
245 | int alt_devno = devno; | |
246 | int i; | |
247 | ||
248 | /* allow n.15 for the first device attached to host port */ | |
249 | if (ata_is_host_link(dev->link) && devno == 0) | |
250 | alt_devno = 15; | |
251 | ||
252 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
253 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
254 | unsigned long pio_mask, mwdma_mask, udma_mask; | |
255 | ||
256 | if (fe->port != -1 && fe->port != dev->link->ap->print_id) | |
257 | continue; | |
258 | ||
259 | if (fe->device != -1 && fe->device != devno && | |
260 | fe->device != alt_devno) | |
261 | continue; | |
262 | ||
263 | if (!fe->param.xfer_mask) | |
264 | continue; | |
265 | ||
266 | ata_unpack_xfermask(fe->param.xfer_mask, | |
267 | &pio_mask, &mwdma_mask, &udma_mask); | |
268 | if (udma_mask) | |
269 | dev->udma_mask = udma_mask; | |
270 | else if (mwdma_mask) { | |
271 | dev->udma_mask = 0; | |
272 | dev->mwdma_mask = mwdma_mask; | |
273 | } else { | |
274 | dev->udma_mask = 0; | |
275 | dev->mwdma_mask = 0; | |
276 | dev->pio_mask = pio_mask; | |
277 | } | |
278 | ||
279 | ata_dev_printk(dev, KERN_NOTICE, | |
280 | "FORCE: xfer_mask set to %s\n", fe->param.name); | |
281 | return; | |
282 | } | |
283 | } | |
284 | ||
285 | /** | |
286 | * ata_force_horkage - force horkage according to libata.force | |
287 | * @dev: ATA device of interest | |
288 | * | |
289 | * Force horkage according to libata.force and whine about it. | |
290 | * For consistency with link selection, device number 15 selects | |
291 | * the first device connected to the host link. | |
292 | * | |
293 | * LOCKING: | |
294 | * EH context. | |
295 | */ | |
296 | static void ata_force_horkage(struct ata_device *dev) | |
297 | { | |
298 | int devno = dev->link->pmp + dev->devno; | |
299 | int alt_devno = devno; | |
300 | int i; | |
301 | ||
302 | /* allow n.15 for the first device attached to host port */ | |
303 | if (ata_is_host_link(dev->link) && devno == 0) | |
304 | alt_devno = 15; | |
305 | ||
306 | for (i = 0; i < ata_force_tbl_size; i++) { | |
307 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
308 | ||
309 | if (fe->port != -1 && fe->port != dev->link->ap->print_id) | |
310 | continue; | |
311 | ||
312 | if (fe->device != -1 && fe->device != devno && | |
313 | fe->device != alt_devno) | |
314 | continue; | |
315 | ||
316 | if (!(~dev->horkage & fe->param.horkage_on) && | |
317 | !(dev->horkage & fe->param.horkage_off)) | |
318 | continue; | |
319 | ||
320 | dev->horkage |= fe->param.horkage_on; | |
321 | dev->horkage &= ~fe->param.horkage_off; | |
322 | ||
323 | ata_dev_printk(dev, KERN_NOTICE, | |
324 | "FORCE: horkage modified (%s)\n", fe->param.name); | |
325 | } | |
326 | } | |
327 | ||
436d34b3 TH |
328 | /** |
329 | * atapi_cmd_type - Determine ATAPI command type from SCSI opcode | |
330 | * @opcode: SCSI opcode | |
331 | * | |
332 | * Determine ATAPI command type from @opcode. | |
333 | * | |
334 | * LOCKING: | |
335 | * None. | |
336 | * | |
337 | * RETURNS: | |
338 | * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC} | |
339 | */ | |
340 | int atapi_cmd_type(u8 opcode) | |
341 | { | |
342 | switch (opcode) { | |
343 | case GPCMD_READ_10: | |
344 | case GPCMD_READ_12: | |
345 | return ATAPI_READ; | |
346 | ||
347 | case GPCMD_WRITE_10: | |
348 | case GPCMD_WRITE_12: | |
349 | case GPCMD_WRITE_AND_VERIFY_10: | |
350 | return ATAPI_WRITE; | |
351 | ||
352 | case GPCMD_READ_CD: | |
353 | case GPCMD_READ_CD_MSF: | |
354 | return ATAPI_READ_CD; | |
355 | ||
e52dcc48 TH |
356 | case ATA_16: |
357 | case ATA_12: | |
358 | if (atapi_passthru16) | |
359 | return ATAPI_PASS_THRU; | |
360 | /* fall thru */ | |
436d34b3 TH |
361 | default: |
362 | return ATAPI_MISC; | |
363 | } | |
364 | } | |
365 | ||
1da177e4 LT |
366 | /** |
367 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
368 | * @tf: Taskfile to convert | |
1da177e4 | 369 | * @pmp: Port multiplier port |
9977126c TH |
370 | * @is_cmd: This FIS is for command |
371 | * @fis: Buffer into which data will output | |
1da177e4 LT |
372 | * |
373 | * Converts a standard ATA taskfile to a Serial ATA | |
374 | * FIS structure (Register - Host to Device). | |
375 | * | |
376 | * LOCKING: | |
377 | * Inherited from caller. | |
378 | */ | |
9977126c | 379 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) |
1da177e4 | 380 | { |
9977126c TH |
381 | fis[0] = 0x27; /* Register - Host to Device FIS */ |
382 | fis[1] = pmp & 0xf; /* Port multiplier number*/ | |
383 | if (is_cmd) | |
384 | fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ | |
385 | ||
1da177e4 LT |
386 | fis[2] = tf->command; |
387 | fis[3] = tf->feature; | |
388 | ||
389 | fis[4] = tf->lbal; | |
390 | fis[5] = tf->lbam; | |
391 | fis[6] = tf->lbah; | |
392 | fis[7] = tf->device; | |
393 | ||
394 | fis[8] = tf->hob_lbal; | |
395 | fis[9] = tf->hob_lbam; | |
396 | fis[10] = tf->hob_lbah; | |
397 | fis[11] = tf->hob_feature; | |
398 | ||
399 | fis[12] = tf->nsect; | |
400 | fis[13] = tf->hob_nsect; | |
401 | fis[14] = 0; | |
402 | fis[15] = tf->ctl; | |
403 | ||
404 | fis[16] = 0; | |
405 | fis[17] = 0; | |
406 | fis[18] = 0; | |
407 | fis[19] = 0; | |
408 | } | |
409 | ||
410 | /** | |
411 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
412 | * @fis: Buffer from which data will be input | |
413 | * @tf: Taskfile to output | |
414 | * | |
e12a1be6 | 415 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
416 | * |
417 | * LOCKING: | |
418 | * Inherited from caller. | |
419 | */ | |
420 | ||
057ace5e | 421 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
422 | { |
423 | tf->command = fis[2]; /* status */ | |
424 | tf->feature = fis[3]; /* error */ | |
425 | ||
426 | tf->lbal = fis[4]; | |
427 | tf->lbam = fis[5]; | |
428 | tf->lbah = fis[6]; | |
429 | tf->device = fis[7]; | |
430 | ||
431 | tf->hob_lbal = fis[8]; | |
432 | tf->hob_lbam = fis[9]; | |
433 | tf->hob_lbah = fis[10]; | |
434 | ||
435 | tf->nsect = fis[12]; | |
436 | tf->hob_nsect = fis[13]; | |
437 | } | |
438 | ||
8cbd6df1 AL |
439 | static const u8 ata_rw_cmds[] = { |
440 | /* pio multi */ | |
441 | ATA_CMD_READ_MULTI, | |
442 | ATA_CMD_WRITE_MULTI, | |
443 | ATA_CMD_READ_MULTI_EXT, | |
444 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
445 | 0, |
446 | 0, | |
447 | 0, | |
448 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
449 | /* pio */ |
450 | ATA_CMD_PIO_READ, | |
451 | ATA_CMD_PIO_WRITE, | |
452 | ATA_CMD_PIO_READ_EXT, | |
453 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
454 | 0, |
455 | 0, | |
456 | 0, | |
457 | 0, | |
8cbd6df1 AL |
458 | /* dma */ |
459 | ATA_CMD_READ, | |
460 | ATA_CMD_WRITE, | |
461 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
462 | ATA_CMD_WRITE_EXT, |
463 | 0, | |
464 | 0, | |
465 | 0, | |
466 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 467 | }; |
1da177e4 LT |
468 | |
469 | /** | |
8cbd6df1 | 470 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
bd056d7e TH |
471 | * @tf: command to examine and configure |
472 | * @dev: device tf belongs to | |
1da177e4 | 473 | * |
2e9edbf8 | 474 | * Examine the device configuration and tf->flags to calculate |
8cbd6df1 | 475 | * the proper read/write commands and protocol to use. |
1da177e4 LT |
476 | * |
477 | * LOCKING: | |
478 | * caller. | |
479 | */ | |
bd056d7e | 480 | static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) |
1da177e4 | 481 | { |
9a3dccc4 | 482 | u8 cmd; |
1da177e4 | 483 | |
9a3dccc4 | 484 | int index, fua, lba48, write; |
2e9edbf8 | 485 | |
9a3dccc4 | 486 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
487 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
488 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 489 | |
8cbd6df1 AL |
490 | if (dev->flags & ATA_DFLAG_PIO) { |
491 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 492 | index = dev->multi_count ? 0 : 8; |
9af5c9c9 | 493 | } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { |
8d238e01 AC |
494 | /* Unable to use DMA due to host limitation */ |
495 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 496 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
497 | } else { |
498 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 499 | index = 16; |
8cbd6df1 | 500 | } |
1da177e4 | 501 | |
9a3dccc4 TH |
502 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
503 | if (cmd) { | |
504 | tf->command = cmd; | |
505 | return 0; | |
506 | } | |
507 | return -1; | |
1da177e4 LT |
508 | } |
509 | ||
35b649fe TH |
510 | /** |
511 | * ata_tf_read_block - Read block address from ATA taskfile | |
512 | * @tf: ATA taskfile of interest | |
513 | * @dev: ATA device @tf belongs to | |
514 | * | |
515 | * LOCKING: | |
516 | * None. | |
517 | * | |
518 | * Read block address from @tf. This function can handle all | |
519 | * three address formats - LBA, LBA48 and CHS. tf->protocol and | |
520 | * flags select the address format to use. | |
521 | * | |
522 | * RETURNS: | |
523 | * Block address read from @tf. | |
524 | */ | |
525 | u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) | |
526 | { | |
527 | u64 block = 0; | |
528 | ||
529 | if (tf->flags & ATA_TFLAG_LBA) { | |
530 | if (tf->flags & ATA_TFLAG_LBA48) { | |
531 | block |= (u64)tf->hob_lbah << 40; | |
532 | block |= (u64)tf->hob_lbam << 32; | |
533 | block |= tf->hob_lbal << 24; | |
534 | } else | |
535 | block |= (tf->device & 0xf) << 24; | |
536 | ||
537 | block |= tf->lbah << 16; | |
538 | block |= tf->lbam << 8; | |
539 | block |= tf->lbal; | |
540 | } else { | |
541 | u32 cyl, head, sect; | |
542 | ||
543 | cyl = tf->lbam | (tf->lbah << 8); | |
544 | head = tf->device & 0xf; | |
545 | sect = tf->lbal; | |
546 | ||
547 | block = (cyl * dev->heads + head) * dev->sectors + sect; | |
548 | } | |
549 | ||
550 | return block; | |
551 | } | |
552 | ||
bd056d7e TH |
553 | /** |
554 | * ata_build_rw_tf - Build ATA taskfile for given read/write request | |
555 | * @tf: Target ATA taskfile | |
556 | * @dev: ATA device @tf belongs to | |
557 | * @block: Block address | |
558 | * @n_block: Number of blocks | |
559 | * @tf_flags: RW/FUA etc... | |
560 | * @tag: tag | |
561 | * | |
562 | * LOCKING: | |
563 | * None. | |
564 | * | |
565 | * Build ATA taskfile @tf for read/write request described by | |
566 | * @block, @n_block, @tf_flags and @tag on @dev. | |
567 | * | |
568 | * RETURNS: | |
569 | * | |
570 | * 0 on success, -ERANGE if the request is too large for @dev, | |
571 | * -EINVAL if the request is invalid. | |
572 | */ | |
573 | int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, | |
574 | u64 block, u32 n_block, unsigned int tf_flags, | |
575 | unsigned int tag) | |
576 | { | |
577 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
578 | tf->flags |= tf_flags; | |
579 | ||
6d1245bf | 580 | if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
bd056d7e TH |
581 | /* yay, NCQ */ |
582 | if (!lba_48_ok(block, n_block)) | |
583 | return -ERANGE; | |
584 | ||
585 | tf->protocol = ATA_PROT_NCQ; | |
586 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
587 | ||
588 | if (tf->flags & ATA_TFLAG_WRITE) | |
589 | tf->command = ATA_CMD_FPDMA_WRITE; | |
590 | else | |
591 | tf->command = ATA_CMD_FPDMA_READ; | |
592 | ||
593 | tf->nsect = tag << 3; | |
594 | tf->hob_feature = (n_block >> 8) & 0xff; | |
595 | tf->feature = n_block & 0xff; | |
596 | ||
597 | tf->hob_lbah = (block >> 40) & 0xff; | |
598 | tf->hob_lbam = (block >> 32) & 0xff; | |
599 | tf->hob_lbal = (block >> 24) & 0xff; | |
600 | tf->lbah = (block >> 16) & 0xff; | |
601 | tf->lbam = (block >> 8) & 0xff; | |
602 | tf->lbal = block & 0xff; | |
603 | ||
604 | tf->device = 1 << 6; | |
605 | if (tf->flags & ATA_TFLAG_FUA) | |
606 | tf->device |= 1 << 7; | |
607 | } else if (dev->flags & ATA_DFLAG_LBA) { | |
608 | tf->flags |= ATA_TFLAG_LBA; | |
609 | ||
610 | if (lba_28_ok(block, n_block)) { | |
611 | /* use LBA28 */ | |
612 | tf->device |= (block >> 24) & 0xf; | |
613 | } else if (lba_48_ok(block, n_block)) { | |
614 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
615 | return -ERANGE; | |
616 | ||
617 | /* use LBA48 */ | |
618 | tf->flags |= ATA_TFLAG_LBA48; | |
619 | ||
620 | tf->hob_nsect = (n_block >> 8) & 0xff; | |
621 | ||
622 | tf->hob_lbah = (block >> 40) & 0xff; | |
623 | tf->hob_lbam = (block >> 32) & 0xff; | |
624 | tf->hob_lbal = (block >> 24) & 0xff; | |
625 | } else | |
626 | /* request too large even for LBA48 */ | |
627 | return -ERANGE; | |
628 | ||
629 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
630 | return -EINVAL; | |
631 | ||
632 | tf->nsect = n_block & 0xff; | |
633 | ||
634 | tf->lbah = (block >> 16) & 0xff; | |
635 | tf->lbam = (block >> 8) & 0xff; | |
636 | tf->lbal = block & 0xff; | |
637 | ||
638 | tf->device |= ATA_LBA; | |
639 | } else { | |
640 | /* CHS */ | |
641 | u32 sect, head, cyl, track; | |
642 | ||
643 | /* The request -may- be too large for CHS addressing. */ | |
644 | if (!lba_28_ok(block, n_block)) | |
645 | return -ERANGE; | |
646 | ||
647 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
648 | return -EINVAL; | |
649 | ||
650 | /* Convert LBA to CHS */ | |
651 | track = (u32)block / dev->sectors; | |
652 | cyl = track / dev->heads; | |
653 | head = track % dev->heads; | |
654 | sect = (u32)block % dev->sectors + 1; | |
655 | ||
656 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", | |
657 | (u32)block, track, cyl, head, sect); | |
658 | ||
659 | /* Check whether the converted CHS can fit. | |
660 | Cylinder: 0-65535 | |
661 | Head: 0-15 | |
662 | Sector: 1-255*/ | |
663 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
664 | return -ERANGE; | |
665 | ||
666 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
667 | tf->lbal = sect; | |
668 | tf->lbam = cyl; | |
669 | tf->lbah = cyl >> 8; | |
670 | tf->device |= head; | |
671 | } | |
672 | ||
673 | return 0; | |
674 | } | |
675 | ||
cb95d562 TH |
676 | /** |
677 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
678 | * @pio_mask: pio_mask | |
679 | * @mwdma_mask: mwdma_mask | |
680 | * @udma_mask: udma_mask | |
681 | * | |
682 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
683 | * unsigned int xfer_mask. | |
684 | * | |
685 | * LOCKING: | |
686 | * None. | |
687 | * | |
688 | * RETURNS: | |
689 | * Packed xfer_mask. | |
690 | */ | |
7dc951ae TH |
691 | unsigned long ata_pack_xfermask(unsigned long pio_mask, |
692 | unsigned long mwdma_mask, | |
693 | unsigned long udma_mask) | |
cb95d562 TH |
694 | { |
695 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
696 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
697 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
698 | } | |
699 | ||
c0489e4e TH |
700 | /** |
701 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
702 | * @xfer_mask: xfer_mask to unpack | |
703 | * @pio_mask: resulting pio_mask | |
704 | * @mwdma_mask: resulting mwdma_mask | |
705 | * @udma_mask: resulting udma_mask | |
706 | * | |
707 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
708 | * Any NULL distination masks will be ignored. | |
709 | */ | |
7dc951ae TH |
710 | void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask, |
711 | unsigned long *mwdma_mask, unsigned long *udma_mask) | |
c0489e4e TH |
712 | { |
713 | if (pio_mask) | |
714 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
715 | if (mwdma_mask) | |
716 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
717 | if (udma_mask) | |
718 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
719 | } | |
720 | ||
cb95d562 | 721 | static const struct ata_xfer_ent { |
be9a50c8 | 722 | int shift, bits; |
cb95d562 TH |
723 | u8 base; |
724 | } ata_xfer_tbl[] = { | |
70cd071e TH |
725 | { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, |
726 | { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, | |
727 | { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, | |
cb95d562 TH |
728 | { -1, }, |
729 | }; | |
730 | ||
731 | /** | |
732 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
733 | * @xfer_mask: xfer_mask of interest | |
734 | * | |
735 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
736 | * bit of @xfer_mask is considered. | |
737 | * | |
738 | * LOCKING: | |
739 | * None. | |
740 | * | |
741 | * RETURNS: | |
70cd071e | 742 | * Matching XFER_* value, 0xff if no match found. |
cb95d562 | 743 | */ |
7dc951ae | 744 | u8 ata_xfer_mask2mode(unsigned long xfer_mask) |
cb95d562 TH |
745 | { |
746 | int highbit = fls(xfer_mask) - 1; | |
747 | const struct ata_xfer_ent *ent; | |
748 | ||
749 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
750 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
751 | return ent->base + highbit - ent->shift; | |
70cd071e | 752 | return 0xff; |
cb95d562 TH |
753 | } |
754 | ||
755 | /** | |
756 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
757 | * @xfer_mode: XFER_* of interest | |
758 | * | |
759 | * Return matching xfer_mask for @xfer_mode. | |
760 | * | |
761 | * LOCKING: | |
762 | * None. | |
763 | * | |
764 | * RETURNS: | |
765 | * Matching xfer_mask, 0 if no match found. | |
766 | */ | |
7dc951ae | 767 | unsigned long ata_xfer_mode2mask(u8 xfer_mode) |
cb95d562 TH |
768 | { |
769 | const struct ata_xfer_ent *ent; | |
770 | ||
771 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
772 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
70cd071e TH |
773 | return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) |
774 | & ~((1 << ent->shift) - 1); | |
cb95d562 TH |
775 | return 0; |
776 | } | |
777 | ||
778 | /** | |
779 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
780 | * @xfer_mode: XFER_* of interest | |
781 | * | |
782 | * Return matching xfer_shift for @xfer_mode. | |
783 | * | |
784 | * LOCKING: | |
785 | * None. | |
786 | * | |
787 | * RETURNS: | |
788 | * Matching xfer_shift, -1 if no match found. | |
789 | */ | |
7dc951ae | 790 | int ata_xfer_mode2shift(unsigned long xfer_mode) |
cb95d562 TH |
791 | { |
792 | const struct ata_xfer_ent *ent; | |
793 | ||
794 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
795 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
796 | return ent->shift; | |
797 | return -1; | |
798 | } | |
799 | ||
1da177e4 | 800 | /** |
1da7b0d0 TH |
801 | * ata_mode_string - convert xfer_mask to string |
802 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
1da177e4 LT |
803 | * |
804 | * Determine string which represents the highest speed | |
1da7b0d0 | 805 | * (highest bit in @modemask). |
1da177e4 LT |
806 | * |
807 | * LOCKING: | |
808 | * None. | |
809 | * | |
810 | * RETURNS: | |
811 | * Constant C string representing highest speed listed in | |
1da7b0d0 | 812 | * @mode_mask, or the constant C string "<n/a>". |
1da177e4 | 813 | */ |
7dc951ae | 814 | const char *ata_mode_string(unsigned long xfer_mask) |
1da177e4 | 815 | { |
75f554bc TH |
816 | static const char * const xfer_mode_str[] = { |
817 | "PIO0", | |
818 | "PIO1", | |
819 | "PIO2", | |
820 | "PIO3", | |
821 | "PIO4", | |
b352e57d AC |
822 | "PIO5", |
823 | "PIO6", | |
75f554bc TH |
824 | "MWDMA0", |
825 | "MWDMA1", | |
826 | "MWDMA2", | |
b352e57d AC |
827 | "MWDMA3", |
828 | "MWDMA4", | |
75f554bc TH |
829 | "UDMA/16", |
830 | "UDMA/25", | |
831 | "UDMA/33", | |
832 | "UDMA/44", | |
833 | "UDMA/66", | |
834 | "UDMA/100", | |
835 | "UDMA/133", | |
836 | "UDMA7", | |
837 | }; | |
1da7b0d0 | 838 | int highbit; |
1da177e4 | 839 | |
1da7b0d0 TH |
840 | highbit = fls(xfer_mask) - 1; |
841 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
842 | return xfer_mode_str[highbit]; | |
1da177e4 | 843 | return "<n/a>"; |
1da177e4 LT |
844 | } |
845 | ||
4c360c81 TH |
846 | static const char *sata_spd_string(unsigned int spd) |
847 | { | |
848 | static const char * const spd_str[] = { | |
849 | "1.5 Gbps", | |
850 | "3.0 Gbps", | |
851 | }; | |
852 | ||
853 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) | |
854 | return "<unknown>"; | |
855 | return spd_str[spd - 1]; | |
856 | } | |
857 | ||
3373efd8 | 858 | void ata_dev_disable(struct ata_device *dev) |
0b8efb0a | 859 | { |
09d7f9b0 | 860 | if (ata_dev_enabled(dev)) { |
9af5c9c9 | 861 | if (ata_msg_drv(dev->link->ap)) |
09d7f9b0 | 862 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
562f0c2d | 863 | ata_acpi_on_disable(dev); |
4ae72a1e TH |
864 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | |
865 | ATA_DNXFER_QUIET); | |
0b8efb0a TH |
866 | dev->class++; |
867 | } | |
868 | } | |
869 | ||
ca77329f KCA |
870 | static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) |
871 | { | |
872 | struct ata_link *link = dev->link; | |
873 | struct ata_port *ap = link->ap; | |
874 | u32 scontrol; | |
875 | unsigned int err_mask; | |
876 | int rc; | |
877 | ||
878 | /* | |
879 | * disallow DIPM for drivers which haven't set | |
880 | * ATA_FLAG_IPM. This is because when DIPM is enabled, | |
881 | * phy ready will be set in the interrupt status on | |
882 | * state changes, which will cause some drivers to | |
883 | * think there are errors - additionally drivers will | |
884 | * need to disable hot plug. | |
885 | */ | |
886 | if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) { | |
887 | ap->pm_policy = NOT_AVAILABLE; | |
888 | return -EINVAL; | |
889 | } | |
890 | ||
891 | /* | |
892 | * For DIPM, we will only enable it for the | |
893 | * min_power setting. | |
894 | * | |
895 | * Why? Because Disks are too stupid to know that | |
896 | * If the host rejects a request to go to SLUMBER | |
897 | * they should retry at PARTIAL, and instead it | |
898 | * just would give up. So, for medium_power to | |
899 | * work at all, we need to only allow HIPM. | |
900 | */ | |
901 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); | |
902 | if (rc) | |
903 | return rc; | |
904 | ||
905 | switch (policy) { | |
906 | case MIN_POWER: | |
907 | /* no restrictions on IPM transitions */ | |
908 | scontrol &= ~(0x3 << 8); | |
909 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
910 | if (rc) | |
911 | return rc; | |
912 | ||
913 | /* enable DIPM */ | |
914 | if (dev->flags & ATA_DFLAG_DIPM) | |
915 | err_mask = ata_dev_set_feature(dev, | |
916 | SETFEATURES_SATA_ENABLE, SATA_DIPM); | |
917 | break; | |
918 | case MEDIUM_POWER: | |
919 | /* allow IPM to PARTIAL */ | |
920 | scontrol &= ~(0x1 << 8); | |
921 | scontrol |= (0x2 << 8); | |
922 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
923 | if (rc) | |
924 | return rc; | |
925 | ||
f5456b63 KCA |
926 | /* |
927 | * we don't have to disable DIPM since IPM flags | |
928 | * disallow transitions to SLUMBER, which effectively | |
929 | * disable DIPM if it does not support PARTIAL | |
930 | */ | |
ca77329f KCA |
931 | break; |
932 | case NOT_AVAILABLE: | |
933 | case MAX_PERFORMANCE: | |
934 | /* disable all IPM transitions */ | |
935 | scontrol |= (0x3 << 8); | |
936 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
937 | if (rc) | |
938 | return rc; | |
939 | ||
f5456b63 KCA |
940 | /* |
941 | * we don't have to disable DIPM since IPM flags | |
942 | * disallow all transitions which effectively | |
943 | * disable DIPM anyway. | |
944 | */ | |
ca77329f KCA |
945 | break; |
946 | } | |
947 | ||
948 | /* FIXME: handle SET FEATURES failure */ | |
949 | (void) err_mask; | |
950 | ||
951 | return 0; | |
952 | } | |
953 | ||
954 | /** | |
955 | * ata_dev_enable_pm - enable SATA interface power management | |
48166fd9 SH |
956 | * @dev: device to enable power management |
957 | * @policy: the link power management policy | |
ca77329f KCA |
958 | * |
959 | * Enable SATA Interface power management. This will enable | |
960 | * Device Interface Power Management (DIPM) for min_power | |
961 | * policy, and then call driver specific callbacks for | |
962 | * enabling Host Initiated Power management. | |
963 | * | |
964 | * Locking: Caller. | |
965 | * Returns: -EINVAL if IPM is not supported, 0 otherwise. | |
966 | */ | |
967 | void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy) | |
968 | { | |
969 | int rc = 0; | |
970 | struct ata_port *ap = dev->link->ap; | |
971 | ||
972 | /* set HIPM first, then DIPM */ | |
973 | if (ap->ops->enable_pm) | |
974 | rc = ap->ops->enable_pm(ap, policy); | |
975 | if (rc) | |
976 | goto enable_pm_out; | |
977 | rc = ata_dev_set_dipm(dev, policy); | |
978 | ||
979 | enable_pm_out: | |
980 | if (rc) | |
981 | ap->pm_policy = MAX_PERFORMANCE; | |
982 | else | |
983 | ap->pm_policy = policy; | |
984 | return /* rc */; /* hopefully we can use 'rc' eventually */ | |
985 | } | |
986 | ||
1992a5ed | 987 | #ifdef CONFIG_PM |
ca77329f KCA |
988 | /** |
989 | * ata_dev_disable_pm - disable SATA interface power management | |
48166fd9 | 990 | * @dev: device to disable power management |
ca77329f KCA |
991 | * |
992 | * Disable SATA Interface power management. This will disable | |
993 | * Device Interface Power Management (DIPM) without changing | |
994 | * policy, call driver specific callbacks for disabling Host | |
995 | * Initiated Power management. | |
996 | * | |
997 | * Locking: Caller. | |
998 | * Returns: void | |
999 | */ | |
1000 | static void ata_dev_disable_pm(struct ata_device *dev) | |
1001 | { | |
1002 | struct ata_port *ap = dev->link->ap; | |
1003 | ||
1004 | ata_dev_set_dipm(dev, MAX_PERFORMANCE); | |
1005 | if (ap->ops->disable_pm) | |
1006 | ap->ops->disable_pm(ap); | |
1007 | } | |
1992a5ed | 1008 | #endif /* CONFIG_PM */ |
ca77329f KCA |
1009 | |
1010 | void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy) | |
1011 | { | |
1012 | ap->pm_policy = policy; | |
3ec25ebd | 1013 | ap->link.eh_info.action |= ATA_EH_LPM; |
ca77329f KCA |
1014 | ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY; |
1015 | ata_port_schedule_eh(ap); | |
1016 | } | |
1017 | ||
1992a5ed | 1018 | #ifdef CONFIG_PM |
ca77329f KCA |
1019 | static void ata_lpm_enable(struct ata_host *host) |
1020 | { | |
1021 | struct ata_link *link; | |
1022 | struct ata_port *ap; | |
1023 | struct ata_device *dev; | |
1024 | int i; | |
1025 | ||
1026 | for (i = 0; i < host->n_ports; i++) { | |
1027 | ap = host->ports[i]; | |
1028 | ata_port_for_each_link(link, ap) { | |
1029 | ata_link_for_each_dev(dev, link) | |
1030 | ata_dev_disable_pm(dev); | |
1031 | } | |
1032 | } | |
1033 | } | |
1034 | ||
1035 | static void ata_lpm_disable(struct ata_host *host) | |
1036 | { | |
1037 | int i; | |
1038 | ||
1039 | for (i = 0; i < host->n_ports; i++) { | |
1040 | struct ata_port *ap = host->ports[i]; | |
1041 | ata_lpm_schedule(ap, ap->pm_policy); | |
1042 | } | |
1043 | } | |
1992a5ed | 1044 | #endif /* CONFIG_PM */ |
ca77329f KCA |
1045 | |
1046 | ||
1da177e4 | 1047 | /** |
0d5ff566 | 1048 | * ata_devchk - PATA device presence detection |
1da177e4 LT |
1049 | * @ap: ATA channel to examine |
1050 | * @device: Device to examine (starting at zero) | |
1051 | * | |
1052 | * This technique was originally described in | |
1053 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
1054 | * later found its way into the ATA/ATAPI spec. | |
1055 | * | |
1056 | * Write a pattern to the ATA shadow registers, | |
1057 | * and if a device is present, it will respond by | |
1058 | * correctly storing and echoing back the | |
1059 | * ATA shadow register contents. | |
1060 | * | |
1061 | * LOCKING: | |
1062 | * caller. | |
1063 | */ | |
1064 | ||
0d5ff566 | 1065 | static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) |
1da177e4 LT |
1066 | { |
1067 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
1068 | u8 nsect, lbal; | |
1069 | ||
1070 | ap->ops->dev_select(ap, device); | |
1071 | ||
0d5ff566 TH |
1072 | iowrite8(0x55, ioaddr->nsect_addr); |
1073 | iowrite8(0xaa, ioaddr->lbal_addr); | |
1da177e4 | 1074 | |
0d5ff566 TH |
1075 | iowrite8(0xaa, ioaddr->nsect_addr); |
1076 | iowrite8(0x55, ioaddr->lbal_addr); | |
1da177e4 | 1077 | |
0d5ff566 TH |
1078 | iowrite8(0x55, ioaddr->nsect_addr); |
1079 | iowrite8(0xaa, ioaddr->lbal_addr); | |
1da177e4 | 1080 | |
0d5ff566 TH |
1081 | nsect = ioread8(ioaddr->nsect_addr); |
1082 | lbal = ioread8(ioaddr->lbal_addr); | |
1da177e4 LT |
1083 | |
1084 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
1085 | return 1; /* we found a device */ | |
1086 | ||
1087 | return 0; /* nothing found */ | |
1088 | } | |
1089 | ||
1da177e4 LT |
1090 | /** |
1091 | * ata_dev_classify - determine device type based on ATA-spec signature | |
1092 | * @tf: ATA taskfile register set for device to be identified | |
1093 | * | |
1094 | * Determine from taskfile register contents whether a device is | |
1095 | * ATA or ATAPI, as per "Signature and persistence" section | |
1096 | * of ATA/PI spec (volume 1, sect 5.14). | |
1097 | * | |
1098 | * LOCKING: | |
1099 | * None. | |
1100 | * | |
1101 | * RETURNS: | |
633273a3 TH |
1102 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or |
1103 | * %ATA_DEV_UNKNOWN the event of failure. | |
1da177e4 | 1104 | */ |
057ace5e | 1105 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
1106 | { |
1107 | /* Apple's open source Darwin code hints that some devices only | |
1108 | * put a proper signature into the LBA mid/high registers, | |
1109 | * So, we only check those. It's sufficient for uniqueness. | |
633273a3 TH |
1110 | * |
1111 | * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate | |
1112 | * signatures for ATA and ATAPI devices attached on SerialATA, | |
1113 | * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA | |
1114 | * spec has never mentioned about using different signatures | |
1115 | * for ATA/ATAPI devices. Then, Serial ATA II: Port | |
1116 | * Multiplier specification began to use 0x69/0x96 to identify | |
1117 | * port multpliers and 0x3c/0xc3 to identify SEMB device. | |
1118 | * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and | |
1119 | * 0x69/0x96 shortly and described them as reserved for | |
1120 | * SerialATA. | |
1121 | * | |
1122 | * We follow the current spec and consider that 0x69/0x96 | |
1123 | * identifies a port multiplier and 0x3c/0xc3 a SEMB device. | |
1da177e4 | 1124 | */ |
633273a3 | 1125 | if ((tf->lbam == 0) && (tf->lbah == 0)) { |
1da177e4 LT |
1126 | DPRINTK("found ATA device by sig\n"); |
1127 | return ATA_DEV_ATA; | |
1128 | } | |
1129 | ||
633273a3 | 1130 | if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { |
1da177e4 LT |
1131 | DPRINTK("found ATAPI device by sig\n"); |
1132 | return ATA_DEV_ATAPI; | |
1133 | } | |
1134 | ||
633273a3 TH |
1135 | if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { |
1136 | DPRINTK("found PMP device by sig\n"); | |
1137 | return ATA_DEV_PMP; | |
1138 | } | |
1139 | ||
1140 | if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { | |
2dcb407e | 1141 | printk(KERN_INFO "ata: SEMB device ignored\n"); |
633273a3 TH |
1142 | return ATA_DEV_SEMB_UNSUP; /* not yet */ |
1143 | } | |
1144 | ||
1da177e4 LT |
1145 | DPRINTK("unknown device\n"); |
1146 | return ATA_DEV_UNKNOWN; | |
1147 | } | |
1148 | ||
1149 | /** | |
1150 | * ata_dev_try_classify - Parse returned ATA device signature | |
3f19859e TH |
1151 | * @dev: ATA device to classify (starting at zero) |
1152 | * @present: device seems present | |
b4dc7623 | 1153 | * @r_err: Value of error register on completion |
1da177e4 LT |
1154 | * |
1155 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, | |
1156 | * an ATA/ATAPI-defined set of values is placed in the ATA | |
1157 | * shadow registers, indicating the results of device detection | |
1158 | * and diagnostics. | |
1159 | * | |
1160 | * Select the ATA device, and read the values from the ATA shadow | |
1161 | * registers. Then parse according to the Error register value, | |
1162 | * and the spec-defined values examined by ata_dev_classify(). | |
1163 | * | |
1164 | * LOCKING: | |
1165 | * caller. | |
b4dc7623 TH |
1166 | * |
1167 | * RETURNS: | |
1168 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. | |
1da177e4 | 1169 | */ |
3f19859e TH |
1170 | unsigned int ata_dev_try_classify(struct ata_device *dev, int present, |
1171 | u8 *r_err) | |
1da177e4 | 1172 | { |
3f19859e | 1173 | struct ata_port *ap = dev->link->ap; |
1da177e4 LT |
1174 | struct ata_taskfile tf; |
1175 | unsigned int class; | |
1176 | u8 err; | |
1177 | ||
3f19859e | 1178 | ap->ops->dev_select(ap, dev->devno); |
1da177e4 LT |
1179 | |
1180 | memset(&tf, 0, sizeof(tf)); | |
1181 | ||
1da177e4 | 1182 | ap->ops->tf_read(ap, &tf); |
0169e284 | 1183 | err = tf.feature; |
b4dc7623 TH |
1184 | if (r_err) |
1185 | *r_err = err; | |
1da177e4 | 1186 | |
c5038fc0 AC |
1187 | /* see if device passed diags: continue and warn later */ |
1188 | if (err == 0) | |
93590859 | 1189 | /* diagnostic fail : do nothing _YET_ */ |
3f19859e | 1190 | dev->horkage |= ATA_HORKAGE_DIAGNOSTIC; |
93590859 | 1191 | else if (err == 1) |
1da177e4 | 1192 | /* do nothing */ ; |
3f19859e | 1193 | else if ((dev->devno == 0) && (err == 0x81)) |
1da177e4 LT |
1194 | /* do nothing */ ; |
1195 | else | |
b4dc7623 | 1196 | return ATA_DEV_NONE; |
1da177e4 | 1197 | |
b4dc7623 | 1198 | /* determine if device is ATA or ATAPI */ |
1da177e4 | 1199 | class = ata_dev_classify(&tf); |
b4dc7623 | 1200 | |
d7fbee05 TH |
1201 | if (class == ATA_DEV_UNKNOWN) { |
1202 | /* If the device failed diagnostic, it's likely to | |
1203 | * have reported incorrect device signature too. | |
1204 | * Assume ATA device if the device seems present but | |
1205 | * device signature is invalid with diagnostic | |
1206 | * failure. | |
1207 | */ | |
1208 | if (present && (dev->horkage & ATA_HORKAGE_DIAGNOSTIC)) | |
1209 | class = ATA_DEV_ATA; | |
1210 | else | |
1211 | class = ATA_DEV_NONE; | |
1212 | } else if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) | |
1213 | class = ATA_DEV_NONE; | |
1214 | ||
b4dc7623 | 1215 | return class; |
1da177e4 LT |
1216 | } |
1217 | ||
1218 | /** | |
6a62a04d | 1219 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
1220 | * @id: IDENTIFY DEVICE results we will examine |
1221 | * @s: string into which data is output | |
1222 | * @ofs: offset into identify device page | |
1223 | * @len: length of string to return. must be an even number. | |
1224 | * | |
1225 | * The strings in the IDENTIFY DEVICE page are broken up into | |
1226 | * 16-bit chunks. Run through the string, and output each | |
1227 | * 8-bit chunk linearly, regardless of platform. | |
1228 | * | |
1229 | * LOCKING: | |
1230 | * caller. | |
1231 | */ | |
1232 | ||
6a62a04d TH |
1233 | void ata_id_string(const u16 *id, unsigned char *s, |
1234 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
1235 | { |
1236 | unsigned int c; | |
1237 | ||
1238 | while (len > 0) { | |
1239 | c = id[ofs] >> 8; | |
1240 | *s = c; | |
1241 | s++; | |
1242 | ||
1243 | c = id[ofs] & 0xff; | |
1244 | *s = c; | |
1245 | s++; | |
1246 | ||
1247 | ofs++; | |
1248 | len -= 2; | |
1249 | } | |
1250 | } | |
1251 | ||
0e949ff3 | 1252 | /** |
6a62a04d | 1253 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
1254 | * @id: IDENTIFY DEVICE results we will examine |
1255 | * @s: string into which data is output | |
1256 | * @ofs: offset into identify device page | |
1257 | * @len: length of string to return. must be an odd number. | |
1258 | * | |
6a62a04d | 1259 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
1260 | * trims trailing spaces and terminates the resulting string with |
1261 | * null. @len must be actual maximum length (even number) + 1. | |
1262 | * | |
1263 | * LOCKING: | |
1264 | * caller. | |
1265 | */ | |
6a62a04d TH |
1266 | void ata_id_c_string(const u16 *id, unsigned char *s, |
1267 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
1268 | { |
1269 | unsigned char *p; | |
1270 | ||
1271 | WARN_ON(!(len & 1)); | |
1272 | ||
6a62a04d | 1273 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
1274 | |
1275 | p = s + strnlen(s, len - 1); | |
1276 | while (p > s && p[-1] == ' ') | |
1277 | p--; | |
1278 | *p = '\0'; | |
1279 | } | |
0baab86b | 1280 | |
db6f8759 TH |
1281 | static u64 ata_id_n_sectors(const u16 *id) |
1282 | { | |
1283 | if (ata_id_has_lba(id)) { | |
1284 | if (ata_id_has_lba48(id)) | |
1285 | return ata_id_u64(id, 100); | |
1286 | else | |
1287 | return ata_id_u32(id, 60); | |
1288 | } else { | |
1289 | if (ata_id_current_chs_valid(id)) | |
1290 | return ata_id_u32(id, 57); | |
1291 | else | |
1292 | return id[1] * id[3] * id[6]; | |
1293 | } | |
1294 | } | |
1295 | ||
1e999736 AC |
1296 | static u64 ata_tf_to_lba48(struct ata_taskfile *tf) |
1297 | { | |
1298 | u64 sectors = 0; | |
1299 | ||
1300 | sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; | |
1301 | sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; | |
1302 | sectors |= (tf->hob_lbal & 0xff) << 24; | |
1303 | sectors |= (tf->lbah & 0xff) << 16; | |
1304 | sectors |= (tf->lbam & 0xff) << 8; | |
1305 | sectors |= (tf->lbal & 0xff); | |
1306 | ||
1307 | return ++sectors; | |
1308 | } | |
1309 | ||
1310 | static u64 ata_tf_to_lba(struct ata_taskfile *tf) | |
1311 | { | |
1312 | u64 sectors = 0; | |
1313 | ||
1314 | sectors |= (tf->device & 0x0f) << 24; | |
1315 | sectors |= (tf->lbah & 0xff) << 16; | |
1316 | sectors |= (tf->lbam & 0xff) << 8; | |
1317 | sectors |= (tf->lbal & 0xff); | |
1318 | ||
1319 | return ++sectors; | |
1320 | } | |
1321 | ||
1322 | /** | |
c728a914 TH |
1323 | * ata_read_native_max_address - Read native max address |
1324 | * @dev: target device | |
1325 | * @max_sectors: out parameter for the result native max address | |
1e999736 | 1326 | * |
c728a914 TH |
1327 | * Perform an LBA48 or LBA28 native size query upon the device in |
1328 | * question. | |
1e999736 | 1329 | * |
c728a914 TH |
1330 | * RETURNS: |
1331 | * 0 on success, -EACCES if command is aborted by the drive. | |
1332 | * -EIO on other errors. | |
1e999736 | 1333 | */ |
c728a914 | 1334 | static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) |
1e999736 | 1335 | { |
c728a914 | 1336 | unsigned int err_mask; |
1e999736 | 1337 | struct ata_taskfile tf; |
c728a914 | 1338 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
1339 | |
1340 | ata_tf_init(dev, &tf); | |
1341 | ||
c728a914 | 1342 | /* always clear all address registers */ |
1e999736 | 1343 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1e999736 | 1344 | |
c728a914 TH |
1345 | if (lba48) { |
1346 | tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; | |
1347 | tf.flags |= ATA_TFLAG_LBA48; | |
1348 | } else | |
1349 | tf.command = ATA_CMD_READ_NATIVE_MAX; | |
1e999736 | 1350 | |
1e999736 | 1351 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 TH |
1352 | tf.device |= ATA_LBA; |
1353 | ||
2b789108 | 1354 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
c728a914 TH |
1355 | if (err_mask) { |
1356 | ata_dev_printk(dev, KERN_WARNING, "failed to read native " | |
1357 | "max address (err_mask=0x%x)\n", err_mask); | |
1358 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
1359 | return -EACCES; | |
1360 | return -EIO; | |
1361 | } | |
1e999736 | 1362 | |
c728a914 TH |
1363 | if (lba48) |
1364 | *max_sectors = ata_tf_to_lba48(&tf); | |
1365 | else | |
1366 | *max_sectors = ata_tf_to_lba(&tf); | |
2dcb407e | 1367 | if (dev->horkage & ATA_HORKAGE_HPA_SIZE) |
93328e11 | 1368 | (*max_sectors)--; |
c728a914 | 1369 | return 0; |
1e999736 AC |
1370 | } |
1371 | ||
1372 | /** | |
c728a914 TH |
1373 | * ata_set_max_sectors - Set max sectors |
1374 | * @dev: target device | |
6b38d1d1 | 1375 | * @new_sectors: new max sectors value to set for the device |
1e999736 | 1376 | * |
c728a914 TH |
1377 | * Set max sectors of @dev to @new_sectors. |
1378 | * | |
1379 | * RETURNS: | |
1380 | * 0 on success, -EACCES if command is aborted or denied (due to | |
1381 | * previous non-volatile SET_MAX) by the drive. -EIO on other | |
1382 | * errors. | |
1e999736 | 1383 | */ |
05027adc | 1384 | static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) |
1e999736 | 1385 | { |
c728a914 | 1386 | unsigned int err_mask; |
1e999736 | 1387 | struct ata_taskfile tf; |
c728a914 | 1388 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
1389 | |
1390 | new_sectors--; | |
1391 | ||
1392 | ata_tf_init(dev, &tf); | |
1393 | ||
1e999736 | 1394 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
c728a914 TH |
1395 | |
1396 | if (lba48) { | |
1397 | tf.command = ATA_CMD_SET_MAX_EXT; | |
1398 | tf.flags |= ATA_TFLAG_LBA48; | |
1399 | ||
1400 | tf.hob_lbal = (new_sectors >> 24) & 0xff; | |
1401 | tf.hob_lbam = (new_sectors >> 32) & 0xff; | |
1402 | tf.hob_lbah = (new_sectors >> 40) & 0xff; | |
1e582ba4 | 1403 | } else { |
c728a914 TH |
1404 | tf.command = ATA_CMD_SET_MAX; |
1405 | ||
1e582ba4 TH |
1406 | tf.device |= (new_sectors >> 24) & 0xf; |
1407 | } | |
1408 | ||
1e999736 | 1409 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 | 1410 | tf.device |= ATA_LBA; |
1e999736 AC |
1411 | |
1412 | tf.lbal = (new_sectors >> 0) & 0xff; | |
1413 | tf.lbam = (new_sectors >> 8) & 0xff; | |
1414 | tf.lbah = (new_sectors >> 16) & 0xff; | |
1e999736 | 1415 | |
2b789108 | 1416 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
c728a914 TH |
1417 | if (err_mask) { |
1418 | ata_dev_printk(dev, KERN_WARNING, "failed to set " | |
1419 | "max address (err_mask=0x%x)\n", err_mask); | |
1420 | if (err_mask == AC_ERR_DEV && | |
1421 | (tf.feature & (ATA_ABORTED | ATA_IDNF))) | |
1422 | return -EACCES; | |
1423 | return -EIO; | |
1424 | } | |
1425 | ||
c728a914 | 1426 | return 0; |
1e999736 AC |
1427 | } |
1428 | ||
1429 | /** | |
1430 | * ata_hpa_resize - Resize a device with an HPA set | |
1431 | * @dev: Device to resize | |
1432 | * | |
1433 | * Read the size of an LBA28 or LBA48 disk with HPA features and resize | |
1434 | * it if required to the full size of the media. The caller must check | |
1435 | * the drive has the HPA feature set enabled. | |
05027adc TH |
1436 | * |
1437 | * RETURNS: | |
1438 | * 0 on success, -errno on failure. | |
1e999736 | 1439 | */ |
05027adc | 1440 | static int ata_hpa_resize(struct ata_device *dev) |
1e999736 | 1441 | { |
05027adc TH |
1442 | struct ata_eh_context *ehc = &dev->link->eh_context; |
1443 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; | |
1444 | u64 sectors = ata_id_n_sectors(dev->id); | |
1445 | u64 native_sectors; | |
c728a914 | 1446 | int rc; |
a617c09f | 1447 | |
05027adc TH |
1448 | /* do we need to do it? */ |
1449 | if (dev->class != ATA_DEV_ATA || | |
1450 | !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || | |
1451 | (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) | |
c728a914 | 1452 | return 0; |
1e999736 | 1453 | |
05027adc TH |
1454 | /* read native max address */ |
1455 | rc = ata_read_native_max_address(dev, &native_sectors); | |
1456 | if (rc) { | |
dda7aba1 TH |
1457 | /* If device aborted the command or HPA isn't going to |
1458 | * be unlocked, skip HPA resizing. | |
05027adc | 1459 | */ |
dda7aba1 | 1460 | if (rc == -EACCES || !ata_ignore_hpa) { |
05027adc | 1461 | ata_dev_printk(dev, KERN_WARNING, "HPA support seems " |
dda7aba1 | 1462 | "broken, skipping HPA handling\n"); |
05027adc TH |
1463 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; |
1464 | ||
1465 | /* we can continue if device aborted the command */ | |
1466 | if (rc == -EACCES) | |
1467 | rc = 0; | |
1e999736 | 1468 | } |
37301a55 | 1469 | |
05027adc TH |
1470 | return rc; |
1471 | } | |
1472 | ||
1473 | /* nothing to do? */ | |
1474 | if (native_sectors <= sectors || !ata_ignore_hpa) { | |
1475 | if (!print_info || native_sectors == sectors) | |
1476 | return 0; | |
1477 | ||
1478 | if (native_sectors > sectors) | |
1479 | ata_dev_printk(dev, KERN_INFO, | |
1480 | "HPA detected: current %llu, native %llu\n", | |
1481 | (unsigned long long)sectors, | |
1482 | (unsigned long long)native_sectors); | |
1483 | else if (native_sectors < sectors) | |
1484 | ata_dev_printk(dev, KERN_WARNING, | |
1485 | "native sectors (%llu) is smaller than " | |
1486 | "sectors (%llu)\n", | |
1487 | (unsigned long long)native_sectors, | |
1488 | (unsigned long long)sectors); | |
1489 | return 0; | |
1490 | } | |
1491 | ||
1492 | /* let's unlock HPA */ | |
1493 | rc = ata_set_max_sectors(dev, native_sectors); | |
1494 | if (rc == -EACCES) { | |
1495 | /* if device aborted the command, skip HPA resizing */ | |
1496 | ata_dev_printk(dev, KERN_WARNING, "device aborted resize " | |
1497 | "(%llu -> %llu), skipping HPA handling\n", | |
1498 | (unsigned long long)sectors, | |
1499 | (unsigned long long)native_sectors); | |
1500 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; | |
1501 | return 0; | |
1502 | } else if (rc) | |
1503 | return rc; | |
1504 | ||
1505 | /* re-read IDENTIFY data */ | |
1506 | rc = ata_dev_reread_id(dev, 0); | |
1507 | if (rc) { | |
1508 | ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY " | |
1509 | "data after HPA resizing\n"); | |
1510 | return rc; | |
1511 | } | |
1512 | ||
1513 | if (print_info) { | |
1514 | u64 new_sectors = ata_id_n_sectors(dev->id); | |
1515 | ata_dev_printk(dev, KERN_INFO, | |
1516 | "HPA unlocked: %llu -> %llu, native %llu\n", | |
1517 | (unsigned long long)sectors, | |
1518 | (unsigned long long)new_sectors, | |
1519 | (unsigned long long)native_sectors); | |
1520 | } | |
1521 | ||
1522 | return 0; | |
1e999736 AC |
1523 | } |
1524 | ||
0baab86b EF |
1525 | /** |
1526 | * ata_noop_dev_select - Select device 0/1 on ATA bus | |
1527 | * @ap: ATA channel to manipulate | |
1528 | * @device: ATA device (numbered from zero) to select | |
1529 | * | |
1530 | * This function performs no actual function. | |
1531 | * | |
1532 | * May be used as the dev_select() entry in ata_port_operations. | |
1533 | * | |
1534 | * LOCKING: | |
1535 | * caller. | |
1536 | */ | |
2dcb407e | 1537 | void ata_noop_dev_select(struct ata_port *ap, unsigned int device) |
1da177e4 LT |
1538 | { |
1539 | } | |
1540 | ||
0baab86b | 1541 | |
1da177e4 LT |
1542 | /** |
1543 | * ata_std_dev_select - Select device 0/1 on ATA bus | |
1544 | * @ap: ATA channel to manipulate | |
1545 | * @device: ATA device (numbered from zero) to select | |
1546 | * | |
1547 | * Use the method defined in the ATA specification to | |
1548 | * make either device 0, or device 1, active on the | |
0baab86b EF |
1549 | * ATA channel. Works with both PIO and MMIO. |
1550 | * | |
1551 | * May be used as the dev_select() entry in ata_port_operations. | |
1da177e4 LT |
1552 | * |
1553 | * LOCKING: | |
1554 | * caller. | |
1555 | */ | |
1556 | ||
2dcb407e | 1557 | void ata_std_dev_select(struct ata_port *ap, unsigned int device) |
1da177e4 LT |
1558 | { |
1559 | u8 tmp; | |
1560 | ||
1561 | if (device == 0) | |
1562 | tmp = ATA_DEVICE_OBS; | |
1563 | else | |
1564 | tmp = ATA_DEVICE_OBS | ATA_DEV1; | |
1565 | ||
0d5ff566 | 1566 | iowrite8(tmp, ap->ioaddr.device_addr); |
1da177e4 LT |
1567 | ata_pause(ap); /* needed; also flushes, for mmio */ |
1568 | } | |
1569 | ||
1570 | /** | |
1571 | * ata_dev_select - Select device 0/1 on ATA bus | |
1572 | * @ap: ATA channel to manipulate | |
1573 | * @device: ATA device (numbered from zero) to select | |
1574 | * @wait: non-zero to wait for Status register BSY bit to clear | |
1575 | * @can_sleep: non-zero if context allows sleeping | |
1576 | * | |
1577 | * Use the method defined in the ATA specification to | |
1578 | * make either device 0, or device 1, active on the | |
1579 | * ATA channel. | |
1580 | * | |
1581 | * This is a high-level version of ata_std_dev_select(), | |
1582 | * which additionally provides the services of inserting | |
1583 | * the proper pauses and status polling, where needed. | |
1584 | * | |
1585 | * LOCKING: | |
1586 | * caller. | |
1587 | */ | |
1588 | ||
1589 | void ata_dev_select(struct ata_port *ap, unsigned int device, | |
1590 | unsigned int wait, unsigned int can_sleep) | |
1591 | { | |
88574551 | 1592 | if (ata_msg_probe(ap)) |
44877b4e TH |
1593 | ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " |
1594 | "device %u, wait %u\n", device, wait); | |
1da177e4 LT |
1595 | |
1596 | if (wait) | |
1597 | ata_wait_idle(ap); | |
1598 | ||
1599 | ap->ops->dev_select(ap, device); | |
1600 | ||
1601 | if (wait) { | |
9af5c9c9 | 1602 | if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI) |
1da177e4 LT |
1603 | msleep(150); |
1604 | ata_wait_idle(ap); | |
1605 | } | |
1606 | } | |
1607 | ||
1608 | /** | |
1609 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 1610 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 1611 | * |
0bd3300a TH |
1612 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
1613 | * page. | |
1da177e4 LT |
1614 | * |
1615 | * LOCKING: | |
1616 | * caller. | |
1617 | */ | |
1618 | ||
0bd3300a | 1619 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
1620 | { |
1621 | DPRINTK("49==0x%04x " | |
1622 | "53==0x%04x " | |
1623 | "63==0x%04x " | |
1624 | "64==0x%04x " | |
1625 | "75==0x%04x \n", | |
0bd3300a TH |
1626 | id[49], |
1627 | id[53], | |
1628 | id[63], | |
1629 | id[64], | |
1630 | id[75]); | |
1da177e4 LT |
1631 | DPRINTK("80==0x%04x " |
1632 | "81==0x%04x " | |
1633 | "82==0x%04x " | |
1634 | "83==0x%04x " | |
1635 | "84==0x%04x \n", | |
0bd3300a TH |
1636 | id[80], |
1637 | id[81], | |
1638 | id[82], | |
1639 | id[83], | |
1640 | id[84]); | |
1da177e4 LT |
1641 | DPRINTK("88==0x%04x " |
1642 | "93==0x%04x\n", | |
0bd3300a TH |
1643 | id[88], |
1644 | id[93]); | |
1da177e4 LT |
1645 | } |
1646 | ||
cb95d562 TH |
1647 | /** |
1648 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
1649 | * @id: IDENTIFY data to compute xfer mask from | |
1650 | * | |
1651 | * Compute the xfermask for this device. This is not as trivial | |
1652 | * as it seems if we must consider early devices correctly. | |
1653 | * | |
1654 | * FIXME: pre IDE drive timing (do we care ?). | |
1655 | * | |
1656 | * LOCKING: | |
1657 | * None. | |
1658 | * | |
1659 | * RETURNS: | |
1660 | * Computed xfermask | |
1661 | */ | |
7dc951ae | 1662 | unsigned long ata_id_xfermask(const u16 *id) |
cb95d562 | 1663 | { |
7dc951ae | 1664 | unsigned long pio_mask, mwdma_mask, udma_mask; |
cb95d562 TH |
1665 | |
1666 | /* Usual case. Word 53 indicates word 64 is valid */ | |
1667 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
1668 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
1669 | pio_mask <<= 3; | |
1670 | pio_mask |= 0x7; | |
1671 | } else { | |
1672 | /* If word 64 isn't valid then Word 51 high byte holds | |
1673 | * the PIO timing number for the maximum. Turn it into | |
1674 | * a mask. | |
1675 | */ | |
7a0f1c8a | 1676 | u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
46767aeb | 1677 | if (mode < 5) /* Valid PIO range */ |
2dcb407e | 1678 | pio_mask = (2 << mode) - 1; |
46767aeb AC |
1679 | else |
1680 | pio_mask = 1; | |
cb95d562 TH |
1681 | |
1682 | /* But wait.. there's more. Design your standards by | |
1683 | * committee and you too can get a free iordy field to | |
1684 | * process. However its the speeds not the modes that | |
1685 | * are supported... Note drivers using the timing API | |
1686 | * will get this right anyway | |
1687 | */ | |
1688 | } | |
1689 | ||
1690 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
fb21f0d0 | 1691 | |
b352e57d AC |
1692 | if (ata_id_is_cfa(id)) { |
1693 | /* | |
1694 | * Process compact flash extended modes | |
1695 | */ | |
1696 | int pio = id[163] & 0x7; | |
1697 | int dma = (id[163] >> 3) & 7; | |
1698 | ||
1699 | if (pio) | |
1700 | pio_mask |= (1 << 5); | |
1701 | if (pio > 1) | |
1702 | pio_mask |= (1 << 6); | |
1703 | if (dma) | |
1704 | mwdma_mask |= (1 << 3); | |
1705 | if (dma > 1) | |
1706 | mwdma_mask |= (1 << 4); | |
1707 | } | |
1708 | ||
fb21f0d0 TH |
1709 | udma_mask = 0; |
1710 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
1711 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
cb95d562 TH |
1712 | |
1713 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
1714 | } | |
1715 | ||
86e45b6b | 1716 | /** |
442eacc3 | 1717 | * ata_pio_queue_task - Queue port_task |
86e45b6b | 1718 | * @ap: The ata_port to queue port_task for |
e2a7f77a | 1719 | * @fn: workqueue function to be scheduled |
65f27f38 | 1720 | * @data: data for @fn to use |
e2a7f77a | 1721 | * @delay: delay time for workqueue function |
86e45b6b TH |
1722 | * |
1723 | * Schedule @fn(@data) for execution after @delay jiffies using | |
1724 | * port_task. There is one port_task per port and it's the | |
1725 | * user(low level driver)'s responsibility to make sure that only | |
1726 | * one task is active at any given time. | |
1727 | * | |
1728 | * libata core layer takes care of synchronization between | |
442eacc3 | 1729 | * port_task and EH. ata_pio_queue_task() may be ignored for EH |
86e45b6b TH |
1730 | * synchronization. |
1731 | * | |
1732 | * LOCKING: | |
1733 | * Inherited from caller. | |
1734 | */ | |
442eacc3 JG |
1735 | static void ata_pio_queue_task(struct ata_port *ap, void *data, |
1736 | unsigned long delay) | |
86e45b6b | 1737 | { |
65f27f38 | 1738 | ap->port_task_data = data; |
86e45b6b | 1739 | |
45a66c1c ON |
1740 | /* may fail if ata_port_flush_task() in progress */ |
1741 | queue_delayed_work(ata_wq, &ap->port_task, delay); | |
86e45b6b TH |
1742 | } |
1743 | ||
1744 | /** | |
1745 | * ata_port_flush_task - Flush port_task | |
1746 | * @ap: The ata_port to flush port_task for | |
1747 | * | |
1748 | * After this function completes, port_task is guranteed not to | |
1749 | * be running or scheduled. | |
1750 | * | |
1751 | * LOCKING: | |
1752 | * Kernel thread context (may sleep) | |
1753 | */ | |
1754 | void ata_port_flush_task(struct ata_port *ap) | |
1755 | { | |
86e45b6b TH |
1756 | DPRINTK("ENTER\n"); |
1757 | ||
45a66c1c | 1758 | cancel_rearming_delayed_work(&ap->port_task); |
86e45b6b | 1759 | |
0dd4b21f | 1760 | if (ata_msg_ctl(ap)) |
7f5e4e8d | 1761 | ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __func__); |
86e45b6b TH |
1762 | } |
1763 | ||
7102d230 | 1764 | static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 1765 | { |
77853bf2 | 1766 | struct completion *waiting = qc->private_data; |
a2a7a662 | 1767 | |
a2a7a662 | 1768 | complete(waiting); |
a2a7a662 TH |
1769 | } |
1770 | ||
1771 | /** | |
2432697b | 1772 | * ata_exec_internal_sg - execute libata internal command |
a2a7a662 TH |
1773 | * @dev: Device to which the command is sent |
1774 | * @tf: Taskfile registers for the command and the result | |
d69cf37d | 1775 | * @cdb: CDB for packet command |
a2a7a662 | 1776 | * @dma_dir: Data tranfer direction of the command |
5c1ad8b3 | 1777 | * @sgl: sg list for the data buffer of the command |
2432697b | 1778 | * @n_elem: Number of sg entries |
2b789108 | 1779 | * @timeout: Timeout in msecs (0 for default) |
a2a7a662 TH |
1780 | * |
1781 | * Executes libata internal command with timeout. @tf contains | |
1782 | * command on entry and result on return. Timeout and error | |
1783 | * conditions are reported via return value. No recovery action | |
1784 | * is taken after a command times out. It's caller's duty to | |
1785 | * clean up after timeout. | |
1786 | * | |
1787 | * LOCKING: | |
1788 | * None. Should be called with kernel context, might sleep. | |
551e8889 TH |
1789 | * |
1790 | * RETURNS: | |
1791 | * Zero on success, AC_ERR_* mask on failure | |
a2a7a662 | 1792 | */ |
2432697b TH |
1793 | unsigned ata_exec_internal_sg(struct ata_device *dev, |
1794 | struct ata_taskfile *tf, const u8 *cdb, | |
87260216 | 1795 | int dma_dir, struct scatterlist *sgl, |
2b789108 | 1796 | unsigned int n_elem, unsigned long timeout) |
a2a7a662 | 1797 | { |
9af5c9c9 TH |
1798 | struct ata_link *link = dev->link; |
1799 | struct ata_port *ap = link->ap; | |
a2a7a662 TH |
1800 | u8 command = tf->command; |
1801 | struct ata_queued_cmd *qc; | |
2ab7db1f | 1802 | unsigned int tag, preempted_tag; |
dedaf2b0 | 1803 | u32 preempted_sactive, preempted_qc_active; |
da917d69 | 1804 | int preempted_nr_active_links; |
60be6b9a | 1805 | DECLARE_COMPLETION_ONSTACK(wait); |
a2a7a662 | 1806 | unsigned long flags; |
77853bf2 | 1807 | unsigned int err_mask; |
d95a717f | 1808 | int rc; |
a2a7a662 | 1809 | |
ba6a1308 | 1810 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 | 1811 | |
e3180499 | 1812 | /* no internal command while frozen */ |
b51e9e5d | 1813 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
ba6a1308 | 1814 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1815 | return AC_ERR_SYSTEM; |
1816 | } | |
1817 | ||
2ab7db1f | 1818 | /* initialize internal qc */ |
a2a7a662 | 1819 | |
2ab7db1f TH |
1820 | /* XXX: Tag 0 is used for drivers with legacy EH as some |
1821 | * drivers choke if any other tag is given. This breaks | |
1822 | * ata_tag_internal() test for those drivers. Don't use new | |
1823 | * EH stuff without converting to it. | |
1824 | */ | |
1825 | if (ap->ops->error_handler) | |
1826 | tag = ATA_TAG_INTERNAL; | |
1827 | else | |
1828 | tag = 0; | |
1829 | ||
6cec4a39 | 1830 | if (test_and_set_bit(tag, &ap->qc_allocated)) |
2ab7db1f | 1831 | BUG(); |
f69499f4 | 1832 | qc = __ata_qc_from_tag(ap, tag); |
2ab7db1f TH |
1833 | |
1834 | qc->tag = tag; | |
1835 | qc->scsicmd = NULL; | |
1836 | qc->ap = ap; | |
1837 | qc->dev = dev; | |
1838 | ata_qc_reinit(qc); | |
1839 | ||
9af5c9c9 TH |
1840 | preempted_tag = link->active_tag; |
1841 | preempted_sactive = link->sactive; | |
dedaf2b0 | 1842 | preempted_qc_active = ap->qc_active; |
da917d69 | 1843 | preempted_nr_active_links = ap->nr_active_links; |
9af5c9c9 TH |
1844 | link->active_tag = ATA_TAG_POISON; |
1845 | link->sactive = 0; | |
dedaf2b0 | 1846 | ap->qc_active = 0; |
da917d69 | 1847 | ap->nr_active_links = 0; |
2ab7db1f TH |
1848 | |
1849 | /* prepare & issue qc */ | |
a2a7a662 | 1850 | qc->tf = *tf; |
d69cf37d TH |
1851 | if (cdb) |
1852 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); | |
e61e0672 | 1853 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
a2a7a662 TH |
1854 | qc->dma_dir = dma_dir; |
1855 | if (dma_dir != DMA_NONE) { | |
2432697b | 1856 | unsigned int i, buflen = 0; |
87260216 | 1857 | struct scatterlist *sg; |
2432697b | 1858 | |
87260216 JA |
1859 | for_each_sg(sgl, sg, n_elem, i) |
1860 | buflen += sg->length; | |
2432697b | 1861 | |
87260216 | 1862 | ata_sg_init(qc, sgl, n_elem); |
49c80429 | 1863 | qc->nbytes = buflen; |
a2a7a662 TH |
1864 | } |
1865 | ||
77853bf2 | 1866 | qc->private_data = &wait; |
a2a7a662 TH |
1867 | qc->complete_fn = ata_qc_complete_internal; |
1868 | ||
8e0e694a | 1869 | ata_qc_issue(qc); |
a2a7a662 | 1870 | |
ba6a1308 | 1871 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 | 1872 | |
2b789108 TH |
1873 | if (!timeout) |
1874 | timeout = ata_probe_timeout * 1000 / HZ; | |
1875 | ||
1876 | rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); | |
d95a717f TH |
1877 | |
1878 | ata_port_flush_task(ap); | |
41ade50c | 1879 | |
d95a717f | 1880 | if (!rc) { |
ba6a1308 | 1881 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 TH |
1882 | |
1883 | /* We're racing with irq here. If we lose, the | |
1884 | * following test prevents us from completing the qc | |
d95a717f TH |
1885 | * twice. If we win, the port is frozen and will be |
1886 | * cleaned up by ->post_internal_cmd(). | |
a2a7a662 | 1887 | */ |
77853bf2 | 1888 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
d95a717f TH |
1889 | qc->err_mask |= AC_ERR_TIMEOUT; |
1890 | ||
1891 | if (ap->ops->error_handler) | |
1892 | ata_port_freeze(ap); | |
1893 | else | |
1894 | ata_qc_complete(qc); | |
f15a1daf | 1895 | |
0dd4b21f BP |
1896 | if (ata_msg_warn(ap)) |
1897 | ata_dev_printk(dev, KERN_WARNING, | |
88574551 | 1898 | "qc timeout (cmd 0x%x)\n", command); |
a2a7a662 TH |
1899 | } |
1900 | ||
ba6a1308 | 1901 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 TH |
1902 | } |
1903 | ||
d95a717f TH |
1904 | /* do post_internal_cmd */ |
1905 | if (ap->ops->post_internal_cmd) | |
1906 | ap->ops->post_internal_cmd(qc); | |
1907 | ||
a51d644a TH |
1908 | /* perform minimal error analysis */ |
1909 | if (qc->flags & ATA_QCFLAG_FAILED) { | |
1910 | if (qc->result_tf.command & (ATA_ERR | ATA_DF)) | |
1911 | qc->err_mask |= AC_ERR_DEV; | |
1912 | ||
1913 | if (!qc->err_mask) | |
1914 | qc->err_mask |= AC_ERR_OTHER; | |
1915 | ||
1916 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1917 | qc->err_mask &= ~AC_ERR_OTHER; | |
d95a717f TH |
1918 | } |
1919 | ||
15869303 | 1920 | /* finish up */ |
ba6a1308 | 1921 | spin_lock_irqsave(ap->lock, flags); |
15869303 | 1922 | |
e61e0672 | 1923 | *tf = qc->result_tf; |
77853bf2 TH |
1924 | err_mask = qc->err_mask; |
1925 | ||
1926 | ata_qc_free(qc); | |
9af5c9c9 TH |
1927 | link->active_tag = preempted_tag; |
1928 | link->sactive = preempted_sactive; | |
dedaf2b0 | 1929 | ap->qc_active = preempted_qc_active; |
da917d69 | 1930 | ap->nr_active_links = preempted_nr_active_links; |
77853bf2 | 1931 | |
1f7dd3e9 TH |
1932 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
1933 | * Until those drivers are fixed, we detect the condition | |
1934 | * here, fail the command with AC_ERR_SYSTEM and reenable the | |
1935 | * port. | |
1936 | * | |
1937 | * Note that this doesn't change any behavior as internal | |
1938 | * command failure results in disabling the device in the | |
1939 | * higher layer for LLDDs without new reset/EH callbacks. | |
1940 | * | |
1941 | * Kill the following code as soon as those drivers are fixed. | |
1942 | */ | |
198e0fed | 1943 | if (ap->flags & ATA_FLAG_DISABLED) { |
1f7dd3e9 TH |
1944 | err_mask |= AC_ERR_SYSTEM; |
1945 | ata_port_probe(ap); | |
1946 | } | |
1947 | ||
ba6a1308 | 1948 | spin_unlock_irqrestore(ap->lock, flags); |
15869303 | 1949 | |
77853bf2 | 1950 | return err_mask; |
a2a7a662 TH |
1951 | } |
1952 | ||
2432697b | 1953 | /** |
33480a0e | 1954 | * ata_exec_internal - execute libata internal command |
2432697b TH |
1955 | * @dev: Device to which the command is sent |
1956 | * @tf: Taskfile registers for the command and the result | |
1957 | * @cdb: CDB for packet command | |
1958 | * @dma_dir: Data tranfer direction of the command | |
1959 | * @buf: Data buffer of the command | |
1960 | * @buflen: Length of data buffer | |
2b789108 | 1961 | * @timeout: Timeout in msecs (0 for default) |
2432697b TH |
1962 | * |
1963 | * Wrapper around ata_exec_internal_sg() which takes simple | |
1964 | * buffer instead of sg list. | |
1965 | * | |
1966 | * LOCKING: | |
1967 | * None. Should be called with kernel context, might sleep. | |
1968 | * | |
1969 | * RETURNS: | |
1970 | * Zero on success, AC_ERR_* mask on failure | |
1971 | */ | |
1972 | unsigned ata_exec_internal(struct ata_device *dev, | |
1973 | struct ata_taskfile *tf, const u8 *cdb, | |
2b789108 TH |
1974 | int dma_dir, void *buf, unsigned int buflen, |
1975 | unsigned long timeout) | |
2432697b | 1976 | { |
33480a0e TH |
1977 | struct scatterlist *psg = NULL, sg; |
1978 | unsigned int n_elem = 0; | |
2432697b | 1979 | |
33480a0e TH |
1980 | if (dma_dir != DMA_NONE) { |
1981 | WARN_ON(!buf); | |
1982 | sg_init_one(&sg, buf, buflen); | |
1983 | psg = &sg; | |
1984 | n_elem++; | |
1985 | } | |
2432697b | 1986 | |
2b789108 TH |
1987 | return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, |
1988 | timeout); | |
2432697b TH |
1989 | } |
1990 | ||
977e6b9f TH |
1991 | /** |
1992 | * ata_do_simple_cmd - execute simple internal command | |
1993 | * @dev: Device to which the command is sent | |
1994 | * @cmd: Opcode to execute | |
1995 | * | |
1996 | * Execute a 'simple' command, that only consists of the opcode | |
1997 | * 'cmd' itself, without filling any other registers | |
1998 | * | |
1999 | * LOCKING: | |
2000 | * Kernel thread context (may sleep). | |
2001 | * | |
2002 | * RETURNS: | |
2003 | * Zero on success, AC_ERR_* mask on failure | |
e58eb583 | 2004 | */ |
77b08fb5 | 2005 | unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
e58eb583 TH |
2006 | { |
2007 | struct ata_taskfile tf; | |
e58eb583 TH |
2008 | |
2009 | ata_tf_init(dev, &tf); | |
2010 | ||
2011 | tf.command = cmd; | |
2012 | tf.flags |= ATA_TFLAG_DEVICE; | |
2013 | tf.protocol = ATA_PROT_NODATA; | |
2014 | ||
2b789108 | 2015 | return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
e58eb583 TH |
2016 | } |
2017 | ||
1bc4ccff AC |
2018 | /** |
2019 | * ata_pio_need_iordy - check if iordy needed | |
2020 | * @adev: ATA device | |
2021 | * | |
2022 | * Check if the current speed of the device requires IORDY. Used | |
2023 | * by various controllers for chip configuration. | |
2024 | */ | |
a617c09f | 2025 | |
1bc4ccff AC |
2026 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
2027 | { | |
432729f0 AC |
2028 | /* Controller doesn't support IORDY. Probably a pointless check |
2029 | as the caller should know this */ | |
9af5c9c9 | 2030 | if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) |
1bc4ccff | 2031 | return 0; |
432729f0 AC |
2032 | /* PIO3 and higher it is mandatory */ |
2033 | if (adev->pio_mode > XFER_PIO_2) | |
2034 | return 1; | |
2035 | /* We turn it on when possible */ | |
2036 | if (ata_id_has_iordy(adev->id)) | |
1bc4ccff | 2037 | return 1; |
432729f0 AC |
2038 | return 0; |
2039 | } | |
2e9edbf8 | 2040 | |
432729f0 AC |
2041 | /** |
2042 | * ata_pio_mask_no_iordy - Return the non IORDY mask | |
2043 | * @adev: ATA device | |
2044 | * | |
2045 | * Compute the highest mode possible if we are not using iordy. Return | |
2046 | * -1 if no iordy mode is available. | |
2047 | */ | |
a617c09f | 2048 | |
432729f0 AC |
2049 | static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) |
2050 | { | |
1bc4ccff | 2051 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
1bc4ccff | 2052 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
432729f0 | 2053 | u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
1bc4ccff AC |
2054 | /* Is the speed faster than the drive allows non IORDY ? */ |
2055 | if (pio) { | |
2056 | /* This is cycle times not frequency - watch the logic! */ | |
2057 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
432729f0 AC |
2058 | return 3 << ATA_SHIFT_PIO; |
2059 | return 7 << ATA_SHIFT_PIO; | |
1bc4ccff AC |
2060 | } |
2061 | } | |
432729f0 | 2062 | return 3 << ATA_SHIFT_PIO; |
1bc4ccff AC |
2063 | } |
2064 | ||
1da177e4 | 2065 | /** |
49016aca | 2066 | * ata_dev_read_id - Read ID data from the specified device |
49016aca TH |
2067 | * @dev: target device |
2068 | * @p_class: pointer to class of the target device (may be changed) | |
bff04647 | 2069 | * @flags: ATA_READID_* flags |
fe635c7e | 2070 | * @id: buffer to read IDENTIFY data into |
1da177e4 | 2071 | * |
49016aca TH |
2072 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
2073 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
aec5c3c1 TH |
2074 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
2075 | * for pre-ATA4 drives. | |
1da177e4 | 2076 | * |
50a99018 | 2077 | * FIXME: ATA_CMD_ID_ATA is optional for early drives and right |
2dcb407e | 2078 | * now we abort if we hit that case. |
50a99018 | 2079 | * |
1da177e4 | 2080 | * LOCKING: |
49016aca TH |
2081 | * Kernel thread context (may sleep) |
2082 | * | |
2083 | * RETURNS: | |
2084 | * 0 on success, -errno otherwise. | |
1da177e4 | 2085 | */ |
a9beec95 | 2086 | int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, |
bff04647 | 2087 | unsigned int flags, u16 *id) |
1da177e4 | 2088 | { |
9af5c9c9 | 2089 | struct ata_port *ap = dev->link->ap; |
49016aca | 2090 | unsigned int class = *p_class; |
a0123703 | 2091 | struct ata_taskfile tf; |
49016aca TH |
2092 | unsigned int err_mask = 0; |
2093 | const char *reason; | |
54936f8b | 2094 | int may_fallback = 1, tried_spinup = 0; |
49016aca | 2095 | int rc; |
1da177e4 | 2096 | |
0dd4b21f | 2097 | if (ata_msg_ctl(ap)) |
7f5e4e8d | 2098 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); |
1da177e4 | 2099 | |
49016aca | 2100 | ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ |
49016aca | 2101 | retry: |
3373efd8 | 2102 | ata_tf_init(dev, &tf); |
a0123703 | 2103 | |
49016aca TH |
2104 | switch (class) { |
2105 | case ATA_DEV_ATA: | |
a0123703 | 2106 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
2107 | break; |
2108 | case ATA_DEV_ATAPI: | |
a0123703 | 2109 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
2110 | break; |
2111 | default: | |
2112 | rc = -ENODEV; | |
2113 | reason = "unsupported class"; | |
2114 | goto err_out; | |
1da177e4 LT |
2115 | } |
2116 | ||
a0123703 | 2117 | tf.protocol = ATA_PROT_PIO; |
81afe893 TH |
2118 | |
2119 | /* Some devices choke if TF registers contain garbage. Make | |
2120 | * sure those are properly initialized. | |
2121 | */ | |
2122 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2123 | ||
2124 | /* Device presence detection is unreliable on some | |
2125 | * controllers. Always poll IDENTIFY if available. | |
2126 | */ | |
2127 | tf.flags |= ATA_TFLAG_POLLING; | |
1da177e4 | 2128 | |
3373efd8 | 2129 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
2b789108 | 2130 | id, sizeof(id[0]) * ATA_ID_WORDS, 0); |
a0123703 | 2131 | if (err_mask) { |
800b3996 | 2132 | if (err_mask & AC_ERR_NODEV_HINT) { |
1ffc151f TH |
2133 | ata_dev_printk(dev, KERN_DEBUG, |
2134 | "NODEV after polling detection\n"); | |
55a8e2c8 TH |
2135 | return -ENOENT; |
2136 | } | |
2137 | ||
1ffc151f TH |
2138 | if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { |
2139 | /* Device or controller might have reported | |
2140 | * the wrong device class. Give a shot at the | |
2141 | * other IDENTIFY if the current one is | |
2142 | * aborted by the device. | |
2143 | */ | |
2144 | if (may_fallback) { | |
2145 | may_fallback = 0; | |
2146 | ||
2147 | if (class == ATA_DEV_ATA) | |
2148 | class = ATA_DEV_ATAPI; | |
2149 | else | |
2150 | class = ATA_DEV_ATA; | |
2151 | goto retry; | |
2152 | } | |
2153 | ||
2154 | /* Control reaches here iff the device aborted | |
2155 | * both flavors of IDENTIFYs which happens | |
2156 | * sometimes with phantom devices. | |
2157 | */ | |
2158 | ata_dev_printk(dev, KERN_DEBUG, | |
2159 | "both IDENTIFYs aborted, assuming NODEV\n"); | |
2160 | return -ENOENT; | |
54936f8b TH |
2161 | } |
2162 | ||
49016aca TH |
2163 | rc = -EIO; |
2164 | reason = "I/O error"; | |
1da177e4 LT |
2165 | goto err_out; |
2166 | } | |
2167 | ||
54936f8b TH |
2168 | /* Falling back doesn't make sense if ID data was read |
2169 | * successfully at least once. | |
2170 | */ | |
2171 | may_fallback = 0; | |
2172 | ||
49016aca | 2173 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 | 2174 | |
49016aca | 2175 | /* sanity check */ |
a4f5749b | 2176 | rc = -EINVAL; |
6070068b | 2177 | reason = "device reports invalid type"; |
a4f5749b TH |
2178 | |
2179 | if (class == ATA_DEV_ATA) { | |
2180 | if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) | |
2181 | goto err_out; | |
2182 | } else { | |
2183 | if (ata_id_is_ata(id)) | |
2184 | goto err_out; | |
49016aca TH |
2185 | } |
2186 | ||
169439c2 ML |
2187 | if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { |
2188 | tried_spinup = 1; | |
2189 | /* | |
2190 | * Drive powered-up in standby mode, and requires a specific | |
2191 | * SET_FEATURES spin-up subcommand before it will accept | |
2192 | * anything other than the original IDENTIFY command. | |
2193 | */ | |
218f3d30 | 2194 | err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); |
fb0582f9 | 2195 | if (err_mask && id[2] != 0x738c) { |
169439c2 ML |
2196 | rc = -EIO; |
2197 | reason = "SPINUP failed"; | |
2198 | goto err_out; | |
2199 | } | |
2200 | /* | |
2201 | * If the drive initially returned incomplete IDENTIFY info, | |
2202 | * we now must reissue the IDENTIFY command. | |
2203 | */ | |
2204 | if (id[2] == 0x37c8) | |
2205 | goto retry; | |
2206 | } | |
2207 | ||
bff04647 | 2208 | if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { |
49016aca TH |
2209 | /* |
2210 | * The exact sequence expected by certain pre-ATA4 drives is: | |
2211 | * SRST RESET | |
50a99018 AC |
2212 | * IDENTIFY (optional in early ATA) |
2213 | * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) | |
49016aca TH |
2214 | * anything else.. |
2215 | * Some drives were very specific about that exact sequence. | |
50a99018 AC |
2216 | * |
2217 | * Note that ATA4 says lba is mandatory so the second check | |
2218 | * shoud never trigger. | |
49016aca TH |
2219 | */ |
2220 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
3373efd8 | 2221 | err_mask = ata_dev_init_params(dev, id[3], id[6]); |
49016aca TH |
2222 | if (err_mask) { |
2223 | rc = -EIO; | |
2224 | reason = "INIT_DEV_PARAMS failed"; | |
2225 | goto err_out; | |
2226 | } | |
2227 | ||
2228 | /* current CHS translation info (id[53-58]) might be | |
2229 | * changed. reread the identify device info. | |
2230 | */ | |
bff04647 | 2231 | flags &= ~ATA_READID_POSTRESET; |
49016aca TH |
2232 | goto retry; |
2233 | } | |
2234 | } | |
2235 | ||
2236 | *p_class = class; | |
fe635c7e | 2237 | |
49016aca TH |
2238 | return 0; |
2239 | ||
2240 | err_out: | |
88574551 | 2241 | if (ata_msg_warn(ap)) |
0dd4b21f | 2242 | ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
88574551 | 2243 | "(%s, err_mask=0x%x)\n", reason, err_mask); |
49016aca TH |
2244 | return rc; |
2245 | } | |
2246 | ||
3373efd8 | 2247 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
4b2f3ede | 2248 | { |
9af5c9c9 TH |
2249 | struct ata_port *ap = dev->link->ap; |
2250 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); | |
4b2f3ede TH |
2251 | } |
2252 | ||
a6e6ce8e TH |
2253 | static void ata_dev_config_ncq(struct ata_device *dev, |
2254 | char *desc, size_t desc_sz) | |
2255 | { | |
9af5c9c9 | 2256 | struct ata_port *ap = dev->link->ap; |
a6e6ce8e TH |
2257 | int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); |
2258 | ||
2259 | if (!ata_id_has_ncq(dev->id)) { | |
2260 | desc[0] = '\0'; | |
2261 | return; | |
2262 | } | |
75683fe7 | 2263 | if (dev->horkage & ATA_HORKAGE_NONCQ) { |
6919a0a6 AC |
2264 | snprintf(desc, desc_sz, "NCQ (not used)"); |
2265 | return; | |
2266 | } | |
a6e6ce8e | 2267 | if (ap->flags & ATA_FLAG_NCQ) { |
cca3974e | 2268 | hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
a6e6ce8e TH |
2269 | dev->flags |= ATA_DFLAG_NCQ; |
2270 | } | |
2271 | ||
2272 | if (hdepth >= ddepth) | |
2273 | snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); | |
2274 | else | |
2275 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); | |
2276 | } | |
2277 | ||
49016aca | 2278 | /** |
ffeae418 | 2279 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
ffeae418 TH |
2280 | * @dev: Target device to configure |
2281 | * | |
2282 | * Configure @dev according to @dev->id. Generic and low-level | |
2283 | * driver specific fixups are also applied. | |
49016aca TH |
2284 | * |
2285 | * LOCKING: | |
ffeae418 TH |
2286 | * Kernel thread context (may sleep) |
2287 | * | |
2288 | * RETURNS: | |
2289 | * 0 on success, -errno otherwise | |
49016aca | 2290 | */ |
efdaedc4 | 2291 | int ata_dev_configure(struct ata_device *dev) |
49016aca | 2292 | { |
9af5c9c9 TH |
2293 | struct ata_port *ap = dev->link->ap; |
2294 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
6746544c | 2295 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
1148c3a7 | 2296 | const u16 *id = dev->id; |
7dc951ae | 2297 | unsigned long xfer_mask; |
b352e57d | 2298 | char revbuf[7]; /* XYZ-99\0 */ |
3f64f565 EM |
2299 | char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
2300 | char modelbuf[ATA_ID_PROD_LEN+1]; | |
e6d902a3 | 2301 | int rc; |
49016aca | 2302 | |
0dd4b21f | 2303 | if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
44877b4e | 2304 | ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", |
7f5e4e8d | 2305 | __func__); |
ffeae418 | 2306 | return 0; |
49016aca TH |
2307 | } |
2308 | ||
0dd4b21f | 2309 | if (ata_msg_probe(ap)) |
7f5e4e8d | 2310 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); |
1da177e4 | 2311 | |
75683fe7 TH |
2312 | /* set horkage */ |
2313 | dev->horkage |= ata_dev_blacklisted(dev); | |
33267325 | 2314 | ata_force_horkage(dev); |
75683fe7 | 2315 | |
6746544c TH |
2316 | /* let ACPI work its magic */ |
2317 | rc = ata_acpi_on_devcfg(dev); | |
2318 | if (rc) | |
2319 | return rc; | |
08573a86 | 2320 | |
05027adc TH |
2321 | /* massage HPA, do it early as it might change IDENTIFY data */ |
2322 | rc = ata_hpa_resize(dev); | |
2323 | if (rc) | |
2324 | return rc; | |
2325 | ||
c39f5ebe | 2326 | /* print device capabilities */ |
0dd4b21f | 2327 | if (ata_msg_probe(ap)) |
88574551 TH |
2328 | ata_dev_printk(dev, KERN_DEBUG, |
2329 | "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " | |
2330 | "85:%04x 86:%04x 87:%04x 88:%04x\n", | |
7f5e4e8d | 2331 | __func__, |
f15a1daf TH |
2332 | id[49], id[82], id[83], id[84], |
2333 | id[85], id[86], id[87], id[88]); | |
c39f5ebe | 2334 | |
208a9933 | 2335 | /* initialize to-be-configured parameters */ |
ea1dd4e1 | 2336 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
208a9933 TH |
2337 | dev->max_sectors = 0; |
2338 | dev->cdb_len = 0; | |
2339 | dev->n_sectors = 0; | |
2340 | dev->cylinders = 0; | |
2341 | dev->heads = 0; | |
2342 | dev->sectors = 0; | |
2343 | ||
1da177e4 LT |
2344 | /* |
2345 | * common ATA, ATAPI feature tests | |
2346 | */ | |
2347 | ||
ff8854b2 | 2348 | /* find max transfer mode; for printk only */ |
1148c3a7 | 2349 | xfer_mask = ata_id_xfermask(id); |
1da177e4 | 2350 | |
0dd4b21f BP |
2351 | if (ata_msg_probe(ap)) |
2352 | ata_dump_id(id); | |
1da177e4 | 2353 | |
ef143d57 AL |
2354 | /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
2355 | ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, | |
2356 | sizeof(fwrevbuf)); | |
2357 | ||
2358 | ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, | |
2359 | sizeof(modelbuf)); | |
2360 | ||
1da177e4 LT |
2361 | /* ATA-specific feature tests */ |
2362 | if (dev->class == ATA_DEV_ATA) { | |
b352e57d AC |
2363 | if (ata_id_is_cfa(id)) { |
2364 | if (id[162] & 1) /* CPRM may make this media unusable */ | |
44877b4e TH |
2365 | ata_dev_printk(dev, KERN_WARNING, |
2366 | "supports DRM functions and may " | |
2367 | "not be fully accessable.\n"); | |
b352e57d | 2368 | snprintf(revbuf, 7, "CFA"); |
ae8d4ee7 | 2369 | } else { |
2dcb407e | 2370 | snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); |
ae8d4ee7 AC |
2371 | /* Warn the user if the device has TPM extensions */ |
2372 | if (ata_id_has_tpm(id)) | |
2373 | ata_dev_printk(dev, KERN_WARNING, | |
2374 | "supports DRM functions and may " | |
2375 | "not be fully accessable.\n"); | |
2376 | } | |
b352e57d | 2377 | |
1148c3a7 | 2378 | dev->n_sectors = ata_id_n_sectors(id); |
2940740b | 2379 | |
3f64f565 EM |
2380 | if (dev->id[59] & 0x100) |
2381 | dev->multi_count = dev->id[59] & 0xff; | |
2382 | ||
1148c3a7 | 2383 | if (ata_id_has_lba(id)) { |
4c2d721a | 2384 | const char *lba_desc; |
a6e6ce8e | 2385 | char ncq_desc[20]; |
8bf62ece | 2386 | |
4c2d721a TH |
2387 | lba_desc = "LBA"; |
2388 | dev->flags |= ATA_DFLAG_LBA; | |
1148c3a7 | 2389 | if (ata_id_has_lba48(id)) { |
8bf62ece | 2390 | dev->flags |= ATA_DFLAG_LBA48; |
4c2d721a | 2391 | lba_desc = "LBA48"; |
6fc49adb TH |
2392 | |
2393 | if (dev->n_sectors >= (1UL << 28) && | |
2394 | ata_id_has_flush_ext(id)) | |
2395 | dev->flags |= ATA_DFLAG_FLUSH_EXT; | |
4c2d721a | 2396 | } |
8bf62ece | 2397 | |
a6e6ce8e TH |
2398 | /* config NCQ */ |
2399 | ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); | |
2400 | ||
8bf62ece | 2401 | /* print device info to dmesg */ |
3f64f565 EM |
2402 | if (ata_msg_drv(ap) && print_info) { |
2403 | ata_dev_printk(dev, KERN_INFO, | |
2404 | "%s: %s, %s, max %s\n", | |
2405 | revbuf, modelbuf, fwrevbuf, | |
2406 | ata_mode_string(xfer_mask)); | |
2407 | ata_dev_printk(dev, KERN_INFO, | |
2408 | "%Lu sectors, multi %u: %s %s\n", | |
f15a1daf | 2409 | (unsigned long long)dev->n_sectors, |
3f64f565 EM |
2410 | dev->multi_count, lba_desc, ncq_desc); |
2411 | } | |
ffeae418 | 2412 | } else { |
8bf62ece AL |
2413 | /* CHS */ |
2414 | ||
2415 | /* Default translation */ | |
1148c3a7 TH |
2416 | dev->cylinders = id[1]; |
2417 | dev->heads = id[3]; | |
2418 | dev->sectors = id[6]; | |
8bf62ece | 2419 | |
1148c3a7 | 2420 | if (ata_id_current_chs_valid(id)) { |
8bf62ece | 2421 | /* Current CHS translation is valid. */ |
1148c3a7 TH |
2422 | dev->cylinders = id[54]; |
2423 | dev->heads = id[55]; | |
2424 | dev->sectors = id[56]; | |
8bf62ece AL |
2425 | } |
2426 | ||
2427 | /* print device info to dmesg */ | |
3f64f565 | 2428 | if (ata_msg_drv(ap) && print_info) { |
88574551 | 2429 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2430 | "%s: %s, %s, max %s\n", |
2431 | revbuf, modelbuf, fwrevbuf, | |
2432 | ata_mode_string(xfer_mask)); | |
a84471fe | 2433 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2434 | "%Lu sectors, multi %u, CHS %u/%u/%u\n", |
2435 | (unsigned long long)dev->n_sectors, | |
2436 | dev->multi_count, dev->cylinders, | |
2437 | dev->heads, dev->sectors); | |
2438 | } | |
07f6f7d0 AL |
2439 | } |
2440 | ||
6e7846e9 | 2441 | dev->cdb_len = 16; |
1da177e4 LT |
2442 | } |
2443 | ||
2444 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 2445 | else if (dev->class == ATA_DEV_ATAPI) { |
854c73a2 TH |
2446 | const char *cdb_intr_string = ""; |
2447 | const char *atapi_an_string = ""; | |
91163006 | 2448 | const char *dma_dir_string = ""; |
7d77b247 | 2449 | u32 sntf; |
08a556db | 2450 | |
1148c3a7 | 2451 | rc = atapi_cdb_len(id); |
1da177e4 | 2452 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
0dd4b21f | 2453 | if (ata_msg_warn(ap)) |
88574551 TH |
2454 | ata_dev_printk(dev, KERN_WARNING, |
2455 | "unsupported CDB len\n"); | |
ffeae418 | 2456 | rc = -EINVAL; |
1da177e4 LT |
2457 | goto err_out_nosup; |
2458 | } | |
6e7846e9 | 2459 | dev->cdb_len = (unsigned int) rc; |
1da177e4 | 2460 | |
7d77b247 TH |
2461 | /* Enable ATAPI AN if both the host and device have |
2462 | * the support. If PMP is attached, SNTF is required | |
2463 | * to enable ATAPI AN to discern between PHY status | |
2464 | * changed notifications and ATAPI ANs. | |
9f45cbd3 | 2465 | */ |
7d77b247 TH |
2466 | if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && |
2467 | (!ap->nr_pmp_links || | |
2468 | sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { | |
854c73a2 TH |
2469 | unsigned int err_mask; |
2470 | ||
9f45cbd3 | 2471 | /* issue SET feature command to turn this on */ |
218f3d30 JG |
2472 | err_mask = ata_dev_set_feature(dev, |
2473 | SETFEATURES_SATA_ENABLE, SATA_AN); | |
854c73a2 | 2474 | if (err_mask) |
9f45cbd3 | 2475 | ata_dev_printk(dev, KERN_ERR, |
854c73a2 TH |
2476 | "failed to enable ATAPI AN " |
2477 | "(err_mask=0x%x)\n", err_mask); | |
2478 | else { | |
9f45cbd3 | 2479 | dev->flags |= ATA_DFLAG_AN; |
854c73a2 TH |
2480 | atapi_an_string = ", ATAPI AN"; |
2481 | } | |
9f45cbd3 KCA |
2482 | } |
2483 | ||
08a556db | 2484 | if (ata_id_cdb_intr(dev->id)) { |
312f7da2 | 2485 | dev->flags |= ATA_DFLAG_CDB_INTR; |
08a556db AL |
2486 | cdb_intr_string = ", CDB intr"; |
2487 | } | |
312f7da2 | 2488 | |
91163006 TH |
2489 | if (atapi_dmadir || atapi_id_dmadir(dev->id)) { |
2490 | dev->flags |= ATA_DFLAG_DMADIR; | |
2491 | dma_dir_string = ", DMADIR"; | |
2492 | } | |
2493 | ||
1da177e4 | 2494 | /* print device info to dmesg */ |
5afc8142 | 2495 | if (ata_msg_drv(ap) && print_info) |
ef143d57 | 2496 | ata_dev_printk(dev, KERN_INFO, |
91163006 | 2497 | "ATAPI: %s, %s, max %s%s%s%s\n", |
ef143d57 | 2498 | modelbuf, fwrevbuf, |
12436c30 | 2499 | ata_mode_string(xfer_mask), |
91163006 TH |
2500 | cdb_intr_string, atapi_an_string, |
2501 | dma_dir_string); | |
1da177e4 LT |
2502 | } |
2503 | ||
914ed354 TH |
2504 | /* determine max_sectors */ |
2505 | dev->max_sectors = ATA_MAX_SECTORS; | |
2506 | if (dev->flags & ATA_DFLAG_LBA48) | |
2507 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; | |
2508 | ||
ca77329f KCA |
2509 | if (!(dev->horkage & ATA_HORKAGE_IPM)) { |
2510 | if (ata_id_has_hipm(dev->id)) | |
2511 | dev->flags |= ATA_DFLAG_HIPM; | |
2512 | if (ata_id_has_dipm(dev->id)) | |
2513 | dev->flags |= ATA_DFLAG_DIPM; | |
2514 | } | |
2515 | ||
c5038fc0 AC |
2516 | /* Limit PATA drive on SATA cable bridge transfers to udma5, |
2517 | 200 sectors */ | |
3373efd8 | 2518 | if (ata_dev_knobble(dev)) { |
5afc8142 | 2519 | if (ata_msg_drv(ap) && print_info) |
f15a1daf TH |
2520 | ata_dev_printk(dev, KERN_INFO, |
2521 | "applying bridge limits\n"); | |
5a529139 | 2522 | dev->udma_mask &= ATA_UDMA5; |
4b2f3ede TH |
2523 | dev->max_sectors = ATA_MAX_SECTORS; |
2524 | } | |
2525 | ||
f8d8e579 | 2526 | if ((dev->class == ATA_DEV_ATAPI) && |
f442cd86 | 2527 | (atapi_command_packet_set(id) == TYPE_TAPE)) { |
f8d8e579 | 2528 | dev->max_sectors = ATA_MAX_SECTORS_TAPE; |
f442cd86 AL |
2529 | dev->horkage |= ATA_HORKAGE_STUCK_ERR; |
2530 | } | |
f8d8e579 | 2531 | |
75683fe7 | 2532 | if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) |
03ec52de TH |
2533 | dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, |
2534 | dev->max_sectors); | |
18d6e9d5 | 2535 | |
ca77329f KCA |
2536 | if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) { |
2537 | dev->horkage |= ATA_HORKAGE_IPM; | |
2538 | ||
2539 | /* reset link pm_policy for this port to no pm */ | |
2540 | ap->pm_policy = MAX_PERFORMANCE; | |
2541 | } | |
2542 | ||
4b2f3ede | 2543 | if (ap->ops->dev_config) |
cd0d3bbc | 2544 | ap->ops->dev_config(dev); |
4b2f3ede | 2545 | |
c5038fc0 AC |
2546 | if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
2547 | /* Let the user know. We don't want to disallow opens for | |
2548 | rescue purposes, or in case the vendor is just a blithering | |
2549 | idiot. Do this after the dev_config call as some controllers | |
2550 | with buggy firmware may want to avoid reporting false device | |
2551 | bugs */ | |
2552 | ||
2553 | if (print_info) { | |
2554 | ata_dev_printk(dev, KERN_WARNING, | |
2555 | "Drive reports diagnostics failure. This may indicate a drive\n"); | |
2556 | ata_dev_printk(dev, KERN_WARNING, | |
2557 | "fault or invalid emulation. Contact drive vendor for information.\n"); | |
2558 | } | |
2559 | } | |
2560 | ||
0dd4b21f BP |
2561 | if (ata_msg_probe(ap)) |
2562 | ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", | |
7f5e4e8d | 2563 | __func__, ata_chk_status(ap)); |
ffeae418 | 2564 | return 0; |
1da177e4 LT |
2565 | |
2566 | err_out_nosup: | |
0dd4b21f | 2567 | if (ata_msg_probe(ap)) |
88574551 | 2568 | ata_dev_printk(dev, KERN_DEBUG, |
7f5e4e8d | 2569 | "%s: EXIT, err\n", __func__); |
ffeae418 | 2570 | return rc; |
1da177e4 LT |
2571 | } |
2572 | ||
be0d18df | 2573 | /** |
2e41e8e6 | 2574 | * ata_cable_40wire - return 40 wire cable type |
be0d18df AC |
2575 | * @ap: port |
2576 | * | |
2e41e8e6 | 2577 | * Helper method for drivers which want to hardwire 40 wire cable |
be0d18df AC |
2578 | * detection. |
2579 | */ | |
2580 | ||
2581 | int ata_cable_40wire(struct ata_port *ap) | |
2582 | { | |
2583 | return ATA_CBL_PATA40; | |
2584 | } | |
2585 | ||
2586 | /** | |
2e41e8e6 | 2587 | * ata_cable_80wire - return 80 wire cable type |
be0d18df AC |
2588 | * @ap: port |
2589 | * | |
2e41e8e6 | 2590 | * Helper method for drivers which want to hardwire 80 wire cable |
be0d18df AC |
2591 | * detection. |
2592 | */ | |
2593 | ||
2594 | int ata_cable_80wire(struct ata_port *ap) | |
2595 | { | |
2596 | return ATA_CBL_PATA80; | |
2597 | } | |
2598 | ||
2599 | /** | |
2600 | * ata_cable_unknown - return unknown PATA cable. | |
2601 | * @ap: port | |
2602 | * | |
2603 | * Helper method for drivers which have no PATA cable detection. | |
2604 | */ | |
2605 | ||
2606 | int ata_cable_unknown(struct ata_port *ap) | |
2607 | { | |
2608 | return ATA_CBL_PATA_UNK; | |
2609 | } | |
2610 | ||
c88f90c3 TH |
2611 | /** |
2612 | * ata_cable_ignore - return ignored PATA cable. | |
2613 | * @ap: port | |
2614 | * | |
2615 | * Helper method for drivers which don't use cable type to limit | |
2616 | * transfer mode. | |
2617 | */ | |
2618 | int ata_cable_ignore(struct ata_port *ap) | |
2619 | { | |
2620 | return ATA_CBL_PATA_IGN; | |
2621 | } | |
2622 | ||
be0d18df AC |
2623 | /** |
2624 | * ata_cable_sata - return SATA cable type | |
2625 | * @ap: port | |
2626 | * | |
2627 | * Helper method for drivers which have SATA cables | |
2628 | */ | |
2629 | ||
2630 | int ata_cable_sata(struct ata_port *ap) | |
2631 | { | |
2632 | return ATA_CBL_SATA; | |
2633 | } | |
2634 | ||
1da177e4 LT |
2635 | /** |
2636 | * ata_bus_probe - Reset and probe ATA bus | |
2637 | * @ap: Bus to probe | |
2638 | * | |
0cba632b JG |
2639 | * Master ATA bus probing function. Initiates a hardware-dependent |
2640 | * bus reset, then attempts to identify any devices found on | |
2641 | * the bus. | |
2642 | * | |
1da177e4 | 2643 | * LOCKING: |
0cba632b | 2644 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2645 | * |
2646 | * RETURNS: | |
96072e69 | 2647 | * Zero on success, negative errno otherwise. |
1da177e4 LT |
2648 | */ |
2649 | ||
80289167 | 2650 | int ata_bus_probe(struct ata_port *ap) |
1da177e4 | 2651 | { |
28ca5c57 | 2652 | unsigned int classes[ATA_MAX_DEVICES]; |
14d2bac1 | 2653 | int tries[ATA_MAX_DEVICES]; |
f58229f8 | 2654 | int rc; |
e82cbdb9 | 2655 | struct ata_device *dev; |
1da177e4 | 2656 | |
28ca5c57 | 2657 | ata_port_probe(ap); |
c19ba8af | 2658 | |
f58229f8 TH |
2659 | ata_link_for_each_dev(dev, &ap->link) |
2660 | tries[dev->devno] = ATA_PROBE_MAX_TRIES; | |
14d2bac1 TH |
2661 | |
2662 | retry: | |
cdeab114 TH |
2663 | ata_link_for_each_dev(dev, &ap->link) { |
2664 | /* If we issue an SRST then an ATA drive (not ATAPI) | |
2665 | * may change configuration and be in PIO0 timing. If | |
2666 | * we do a hard reset (or are coming from power on) | |
2667 | * this is true for ATA or ATAPI. Until we've set a | |
2668 | * suitable controller mode we should not touch the | |
2669 | * bus as we may be talking too fast. | |
2670 | */ | |
2671 | dev->pio_mode = XFER_PIO_0; | |
2672 | ||
2673 | /* If the controller has a pio mode setup function | |
2674 | * then use it to set the chipset to rights. Don't | |
2675 | * touch the DMA setup as that will be dealt with when | |
2676 | * configuring devices. | |
2677 | */ | |
2678 | if (ap->ops->set_piomode) | |
2679 | ap->ops->set_piomode(ap, dev); | |
2680 | } | |
2681 | ||
2044470c | 2682 | /* reset and determine device classes */ |
52783c5d | 2683 | ap->ops->phy_reset(ap); |
2061a47a | 2684 | |
f58229f8 | 2685 | ata_link_for_each_dev(dev, &ap->link) { |
52783c5d TH |
2686 | if (!(ap->flags & ATA_FLAG_DISABLED) && |
2687 | dev->class != ATA_DEV_UNKNOWN) | |
2688 | classes[dev->devno] = dev->class; | |
2689 | else | |
2690 | classes[dev->devno] = ATA_DEV_NONE; | |
2044470c | 2691 | |
52783c5d | 2692 | dev->class = ATA_DEV_UNKNOWN; |
28ca5c57 | 2693 | } |
1da177e4 | 2694 | |
52783c5d | 2695 | ata_port_probe(ap); |
2044470c | 2696 | |
f31f0cc2 JG |
2697 | /* read IDENTIFY page and configure devices. We have to do the identify |
2698 | specific sequence bass-ackwards so that PDIAG- is released by | |
2699 | the slave device */ | |
2700 | ||
a4ba7fe2 | 2701 | ata_link_for_each_dev_reverse(dev, &ap->link) { |
f58229f8 TH |
2702 | if (tries[dev->devno]) |
2703 | dev->class = classes[dev->devno]; | |
ffeae418 | 2704 | |
14d2bac1 | 2705 | if (!ata_dev_enabled(dev)) |
ffeae418 | 2706 | continue; |
ffeae418 | 2707 | |
bff04647 TH |
2708 | rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
2709 | dev->id); | |
14d2bac1 TH |
2710 | if (rc) |
2711 | goto fail; | |
f31f0cc2 JG |
2712 | } |
2713 | ||
be0d18df AC |
2714 | /* Now ask for the cable type as PDIAG- should have been released */ |
2715 | if (ap->ops->cable_detect) | |
2716 | ap->cbl = ap->ops->cable_detect(ap); | |
2717 | ||
614fe29b AC |
2718 | /* We may have SATA bridge glue hiding here irrespective of the |
2719 | reported cable types and sensed types */ | |
2720 | ata_link_for_each_dev(dev, &ap->link) { | |
2721 | if (!ata_dev_enabled(dev)) | |
2722 | continue; | |
2723 | /* SATA drives indicate we have a bridge. We don't know which | |
2724 | end of the link the bridge is which is a problem */ | |
2725 | if (ata_id_is_sata(dev->id)) | |
2726 | ap->cbl = ATA_CBL_SATA; | |
2727 | } | |
2728 | ||
f31f0cc2 JG |
2729 | /* After the identify sequence we can now set up the devices. We do |
2730 | this in the normal order so that the user doesn't get confused */ | |
2731 | ||
f58229f8 | 2732 | ata_link_for_each_dev(dev, &ap->link) { |
f31f0cc2 JG |
2733 | if (!ata_dev_enabled(dev)) |
2734 | continue; | |
14d2bac1 | 2735 | |
9af5c9c9 | 2736 | ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; |
efdaedc4 | 2737 | rc = ata_dev_configure(dev); |
9af5c9c9 | 2738 | ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; |
14d2bac1 TH |
2739 | if (rc) |
2740 | goto fail; | |
1da177e4 LT |
2741 | } |
2742 | ||
e82cbdb9 | 2743 | /* configure transfer mode */ |
0260731f | 2744 | rc = ata_set_mode(&ap->link, &dev); |
4ae72a1e | 2745 | if (rc) |
51713d35 | 2746 | goto fail; |
1da177e4 | 2747 | |
f58229f8 TH |
2748 | ata_link_for_each_dev(dev, &ap->link) |
2749 | if (ata_dev_enabled(dev)) | |
e82cbdb9 | 2750 | return 0; |
1da177e4 | 2751 | |
e82cbdb9 TH |
2752 | /* no device present, disable port */ |
2753 | ata_port_disable(ap); | |
96072e69 | 2754 | return -ENODEV; |
14d2bac1 TH |
2755 | |
2756 | fail: | |
4ae72a1e TH |
2757 | tries[dev->devno]--; |
2758 | ||
14d2bac1 TH |
2759 | switch (rc) { |
2760 | case -EINVAL: | |
4ae72a1e | 2761 | /* eeek, something went very wrong, give up */ |
14d2bac1 TH |
2762 | tries[dev->devno] = 0; |
2763 | break; | |
4ae72a1e TH |
2764 | |
2765 | case -ENODEV: | |
2766 | /* give it just one more chance */ | |
2767 | tries[dev->devno] = min(tries[dev->devno], 1); | |
14d2bac1 | 2768 | case -EIO: |
4ae72a1e TH |
2769 | if (tries[dev->devno] == 1) { |
2770 | /* This is the last chance, better to slow | |
2771 | * down than lose it. | |
2772 | */ | |
936fd732 | 2773 | sata_down_spd_limit(&ap->link); |
4ae72a1e TH |
2774 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
2775 | } | |
14d2bac1 TH |
2776 | } |
2777 | ||
4ae72a1e | 2778 | if (!tries[dev->devno]) |
3373efd8 | 2779 | ata_dev_disable(dev); |
ec573755 | 2780 | |
14d2bac1 | 2781 | goto retry; |
1da177e4 LT |
2782 | } |
2783 | ||
2784 | /** | |
0cba632b JG |
2785 | * ata_port_probe - Mark port as enabled |
2786 | * @ap: Port for which we indicate enablement | |
1da177e4 | 2787 | * |
0cba632b JG |
2788 | * Modify @ap data structure such that the system |
2789 | * thinks that the entire port is enabled. | |
2790 | * | |
cca3974e | 2791 | * LOCKING: host lock, or some other form of |
0cba632b | 2792 | * serialization. |
1da177e4 LT |
2793 | */ |
2794 | ||
2795 | void ata_port_probe(struct ata_port *ap) | |
2796 | { | |
198e0fed | 2797 | ap->flags &= ~ATA_FLAG_DISABLED; |
1da177e4 LT |
2798 | } |
2799 | ||
3be680b7 TH |
2800 | /** |
2801 | * sata_print_link_status - Print SATA link status | |
936fd732 | 2802 | * @link: SATA link to printk link status about |
3be680b7 TH |
2803 | * |
2804 | * This function prints link speed and status of a SATA link. | |
2805 | * | |
2806 | * LOCKING: | |
2807 | * None. | |
2808 | */ | |
936fd732 | 2809 | void sata_print_link_status(struct ata_link *link) |
3be680b7 | 2810 | { |
6d5f9732 | 2811 | u32 sstatus, scontrol, tmp; |
3be680b7 | 2812 | |
936fd732 | 2813 | if (sata_scr_read(link, SCR_STATUS, &sstatus)) |
3be680b7 | 2814 | return; |
936fd732 | 2815 | sata_scr_read(link, SCR_CONTROL, &scontrol); |
3be680b7 | 2816 | |
936fd732 | 2817 | if (ata_link_online(link)) { |
3be680b7 | 2818 | tmp = (sstatus >> 4) & 0xf; |
936fd732 | 2819 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2820 | "SATA link up %s (SStatus %X SControl %X)\n", |
2821 | sata_spd_string(tmp), sstatus, scontrol); | |
3be680b7 | 2822 | } else { |
936fd732 | 2823 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2824 | "SATA link down (SStatus %X SControl %X)\n", |
2825 | sstatus, scontrol); | |
3be680b7 TH |
2826 | } |
2827 | } | |
2828 | ||
ebdfca6e AC |
2829 | /** |
2830 | * ata_dev_pair - return other device on cable | |
ebdfca6e AC |
2831 | * @adev: device |
2832 | * | |
2833 | * Obtain the other device on the same cable, or if none is | |
2834 | * present NULL is returned | |
2835 | */ | |
2e9edbf8 | 2836 | |
3373efd8 | 2837 | struct ata_device *ata_dev_pair(struct ata_device *adev) |
ebdfca6e | 2838 | { |
9af5c9c9 TH |
2839 | struct ata_link *link = adev->link; |
2840 | struct ata_device *pair = &link->device[1 - adev->devno]; | |
e1211e3f | 2841 | if (!ata_dev_enabled(pair)) |
ebdfca6e AC |
2842 | return NULL; |
2843 | return pair; | |
2844 | } | |
2845 | ||
1da177e4 | 2846 | /** |
780a87f7 JG |
2847 | * ata_port_disable - Disable port. |
2848 | * @ap: Port to be disabled. | |
1da177e4 | 2849 | * |
780a87f7 JG |
2850 | * Modify @ap data structure such that the system |
2851 | * thinks that the entire port is disabled, and should | |
2852 | * never attempt to probe or communicate with devices | |
2853 | * on this port. | |
2854 | * | |
cca3974e | 2855 | * LOCKING: host lock, or some other form of |
780a87f7 | 2856 | * serialization. |
1da177e4 LT |
2857 | */ |
2858 | ||
2859 | void ata_port_disable(struct ata_port *ap) | |
2860 | { | |
9af5c9c9 TH |
2861 | ap->link.device[0].class = ATA_DEV_NONE; |
2862 | ap->link.device[1].class = ATA_DEV_NONE; | |
198e0fed | 2863 | ap->flags |= ATA_FLAG_DISABLED; |
1da177e4 LT |
2864 | } |
2865 | ||
1c3fae4d | 2866 | /** |
3c567b7d | 2867 | * sata_down_spd_limit - adjust SATA spd limit downward |
936fd732 | 2868 | * @link: Link to adjust SATA spd limit for |
1c3fae4d | 2869 | * |
936fd732 | 2870 | * Adjust SATA spd limit of @link downward. Note that this |
1c3fae4d | 2871 | * function only adjusts the limit. The change must be applied |
3c567b7d | 2872 | * using sata_set_spd(). |
1c3fae4d TH |
2873 | * |
2874 | * LOCKING: | |
2875 | * Inherited from caller. | |
2876 | * | |
2877 | * RETURNS: | |
2878 | * 0 on success, negative errno on failure | |
2879 | */ | |
936fd732 | 2880 | int sata_down_spd_limit(struct ata_link *link) |
1c3fae4d | 2881 | { |
81952c54 TH |
2882 | u32 sstatus, spd, mask; |
2883 | int rc, highbit; | |
1c3fae4d | 2884 | |
936fd732 | 2885 | if (!sata_scr_valid(link)) |
008a7896 TH |
2886 | return -EOPNOTSUPP; |
2887 | ||
2888 | /* If SCR can be read, use it to determine the current SPD. | |
936fd732 | 2889 | * If not, use cached value in link->sata_spd. |
008a7896 | 2890 | */ |
936fd732 | 2891 | rc = sata_scr_read(link, SCR_STATUS, &sstatus); |
008a7896 TH |
2892 | if (rc == 0) |
2893 | spd = (sstatus >> 4) & 0xf; | |
2894 | else | |
936fd732 | 2895 | spd = link->sata_spd; |
1c3fae4d | 2896 | |
936fd732 | 2897 | mask = link->sata_spd_limit; |
1c3fae4d TH |
2898 | if (mask <= 1) |
2899 | return -EINVAL; | |
008a7896 TH |
2900 | |
2901 | /* unconditionally mask off the highest bit */ | |
1c3fae4d TH |
2902 | highbit = fls(mask) - 1; |
2903 | mask &= ~(1 << highbit); | |
2904 | ||
008a7896 TH |
2905 | /* Mask off all speeds higher than or equal to the current |
2906 | * one. Force 1.5Gbps if current SPD is not available. | |
2907 | */ | |
2908 | if (spd > 1) | |
2909 | mask &= (1 << (spd - 1)) - 1; | |
2910 | else | |
2911 | mask &= 1; | |
2912 | ||
2913 | /* were we already at the bottom? */ | |
1c3fae4d TH |
2914 | if (!mask) |
2915 | return -EINVAL; | |
2916 | ||
936fd732 | 2917 | link->sata_spd_limit = mask; |
1c3fae4d | 2918 | |
936fd732 | 2919 | ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", |
f15a1daf | 2920 | sata_spd_string(fls(mask))); |
1c3fae4d TH |
2921 | |
2922 | return 0; | |
2923 | } | |
2924 | ||
936fd732 | 2925 | static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) |
1c3fae4d | 2926 | { |
5270222f TH |
2927 | struct ata_link *host_link = &link->ap->link; |
2928 | u32 limit, target, spd; | |
1c3fae4d | 2929 | |
5270222f TH |
2930 | limit = link->sata_spd_limit; |
2931 | ||
2932 | /* Don't configure downstream link faster than upstream link. | |
2933 | * It doesn't speed up anything and some PMPs choke on such | |
2934 | * configuration. | |
2935 | */ | |
2936 | if (!ata_is_host_link(link) && host_link->sata_spd) | |
2937 | limit &= (1 << host_link->sata_spd) - 1; | |
2938 | ||
2939 | if (limit == UINT_MAX) | |
2940 | target = 0; | |
1c3fae4d | 2941 | else |
5270222f | 2942 | target = fls(limit); |
1c3fae4d TH |
2943 | |
2944 | spd = (*scontrol >> 4) & 0xf; | |
5270222f | 2945 | *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4); |
1c3fae4d | 2946 | |
5270222f | 2947 | return spd != target; |
1c3fae4d TH |
2948 | } |
2949 | ||
2950 | /** | |
3c567b7d | 2951 | * sata_set_spd_needed - is SATA spd configuration needed |
936fd732 | 2952 | * @link: Link in question |
1c3fae4d TH |
2953 | * |
2954 | * Test whether the spd limit in SControl matches | |
936fd732 | 2955 | * @link->sata_spd_limit. This function is used to determine |
1c3fae4d TH |
2956 | * whether hardreset is necessary to apply SATA spd |
2957 | * configuration. | |
2958 | * | |
2959 | * LOCKING: | |
2960 | * Inherited from caller. | |
2961 | * | |
2962 | * RETURNS: | |
2963 | * 1 if SATA spd configuration is needed, 0 otherwise. | |
2964 | */ | |
936fd732 | 2965 | int sata_set_spd_needed(struct ata_link *link) |
1c3fae4d TH |
2966 | { |
2967 | u32 scontrol; | |
2968 | ||
936fd732 | 2969 | if (sata_scr_read(link, SCR_CONTROL, &scontrol)) |
db64bcf3 | 2970 | return 1; |
1c3fae4d | 2971 | |
936fd732 | 2972 | return __sata_set_spd_needed(link, &scontrol); |
1c3fae4d TH |
2973 | } |
2974 | ||
2975 | /** | |
3c567b7d | 2976 | * sata_set_spd - set SATA spd according to spd limit |
936fd732 | 2977 | * @link: Link to set SATA spd for |
1c3fae4d | 2978 | * |
936fd732 | 2979 | * Set SATA spd of @link according to sata_spd_limit. |
1c3fae4d TH |
2980 | * |
2981 | * LOCKING: | |
2982 | * Inherited from caller. | |
2983 | * | |
2984 | * RETURNS: | |
2985 | * 0 if spd doesn't need to be changed, 1 if spd has been | |
81952c54 | 2986 | * changed. Negative errno if SCR registers are inaccessible. |
1c3fae4d | 2987 | */ |
936fd732 | 2988 | int sata_set_spd(struct ata_link *link) |
1c3fae4d TH |
2989 | { |
2990 | u32 scontrol; | |
81952c54 | 2991 | int rc; |
1c3fae4d | 2992 | |
936fd732 | 2993 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 2994 | return rc; |
1c3fae4d | 2995 | |
936fd732 | 2996 | if (!__sata_set_spd_needed(link, &scontrol)) |
1c3fae4d TH |
2997 | return 0; |
2998 | ||
936fd732 | 2999 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 TH |
3000 | return rc; |
3001 | ||
1c3fae4d TH |
3002 | return 1; |
3003 | } | |
3004 | ||
452503f9 AC |
3005 | /* |
3006 | * This mode timing computation functionality is ported over from | |
3007 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
3008 | */ | |
3009 | /* | |
b352e57d | 3010 | * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). |
452503f9 | 3011 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
b352e57d AC |
3012 | * for UDMA6, which is currently supported only by Maxtor drives. |
3013 | * | |
3014 | * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. | |
452503f9 AC |
3015 | */ |
3016 | ||
3017 | static const struct ata_timing ata_timing[] = { | |
70cd071e TH |
3018 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ |
3019 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, | |
3020 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, | |
3021 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, | |
3022 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, | |
3023 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, | |
3024 | { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, | |
3025 | { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, | |
452503f9 | 3026 | |
70cd071e TH |
3027 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, |
3028 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, | |
3029 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, | |
452503f9 | 3030 | |
70cd071e TH |
3031 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, |
3032 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, | |
3033 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, | |
b352e57d | 3034 | { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, |
70cd071e | 3035 | { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, |
452503f9 AC |
3036 | |
3037 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
70cd071e TH |
3038 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, |
3039 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
3040 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, | |
3041 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
3042 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
3043 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
3044 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
452503f9 AC |
3045 | |
3046 | { 0xFF } | |
3047 | }; | |
3048 | ||
2dcb407e JG |
3049 | #define ENOUGH(v, unit) (((v)-1)/(unit)+1) |
3050 | #define EZ(v, unit) ((v)?ENOUGH(v, unit):0) | |
452503f9 AC |
3051 | |
3052 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
3053 | { | |
3054 | q->setup = EZ(t->setup * 1000, T); | |
3055 | q->act8b = EZ(t->act8b * 1000, T); | |
3056 | q->rec8b = EZ(t->rec8b * 1000, T); | |
3057 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
3058 | q->active = EZ(t->active * 1000, T); | |
3059 | q->recover = EZ(t->recover * 1000, T); | |
3060 | q->cycle = EZ(t->cycle * 1000, T); | |
3061 | q->udma = EZ(t->udma * 1000, UT); | |
3062 | } | |
3063 | ||
3064 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
3065 | struct ata_timing *m, unsigned int what) | |
3066 | { | |
3067 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
3068 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
3069 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
3070 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
3071 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
3072 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
3073 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); | |
3074 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
3075 | } | |
3076 | ||
6357357c | 3077 | const struct ata_timing *ata_timing_find_mode(u8 xfer_mode) |
452503f9 | 3078 | { |
70cd071e TH |
3079 | const struct ata_timing *t = ata_timing; |
3080 | ||
3081 | while (xfer_mode > t->mode) | |
3082 | t++; | |
452503f9 | 3083 | |
70cd071e TH |
3084 | if (xfer_mode == t->mode) |
3085 | return t; | |
3086 | return NULL; | |
452503f9 AC |
3087 | } |
3088 | ||
3089 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
3090 | struct ata_timing *t, int T, int UT) | |
3091 | { | |
3092 | const struct ata_timing *s; | |
3093 | struct ata_timing p; | |
3094 | ||
3095 | /* | |
2e9edbf8 | 3096 | * Find the mode. |
75b1f2f8 | 3097 | */ |
452503f9 AC |
3098 | |
3099 | if (!(s = ata_timing_find_mode(speed))) | |
3100 | return -EINVAL; | |
3101 | ||
75b1f2f8 AL |
3102 | memcpy(t, s, sizeof(*s)); |
3103 | ||
452503f9 AC |
3104 | /* |
3105 | * If the drive is an EIDE drive, it can tell us it needs extended | |
3106 | * PIO/MW_DMA cycle timing. | |
3107 | */ | |
3108 | ||
3109 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ | |
3110 | memset(&p, 0, sizeof(p)); | |
2dcb407e | 3111 | if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { |
452503f9 AC |
3112 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; |
3113 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; | |
2dcb407e | 3114 | } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { |
452503f9 AC |
3115 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; |
3116 | } | |
3117 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); | |
3118 | } | |
3119 | ||
3120 | /* | |
3121 | * Convert the timing to bus clock counts. | |
3122 | */ | |
3123 | ||
75b1f2f8 | 3124 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
3125 | |
3126 | /* | |
c893a3ae RD |
3127 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
3128 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
3129 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
3130 | */ |
3131 | ||
fd3367af | 3132 | if (speed > XFER_PIO_6) { |
452503f9 AC |
3133 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
3134 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
3135 | } | |
3136 | ||
3137 | /* | |
c893a3ae | 3138 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
3139 | */ |
3140 | ||
3141 | if (t->act8b + t->rec8b < t->cyc8b) { | |
3142 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
3143 | t->rec8b = t->cyc8b - t->act8b; | |
3144 | } | |
3145 | ||
3146 | if (t->active + t->recover < t->cycle) { | |
3147 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
3148 | t->recover = t->cycle - t->active; | |
3149 | } | |
a617c09f | 3150 | |
4f701d1e AC |
3151 | /* In a few cases quantisation may produce enough errors to |
3152 | leave t->cycle too low for the sum of active and recovery | |
3153 | if so we must correct this */ | |
3154 | if (t->active + t->recover > t->cycle) | |
3155 | t->cycle = t->active + t->recover; | |
452503f9 AC |
3156 | |
3157 | return 0; | |
3158 | } | |
3159 | ||
a0f79b92 TH |
3160 | /** |
3161 | * ata_timing_cycle2mode - find xfer mode for the specified cycle duration | |
3162 | * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. | |
3163 | * @cycle: cycle duration in ns | |
3164 | * | |
3165 | * Return matching xfer mode for @cycle. The returned mode is of | |
3166 | * the transfer type specified by @xfer_shift. If @cycle is too | |
3167 | * slow for @xfer_shift, 0xff is returned. If @cycle is faster | |
3168 | * than the fastest known mode, the fasted mode is returned. | |
3169 | * | |
3170 | * LOCKING: | |
3171 | * None. | |
3172 | * | |
3173 | * RETURNS: | |
3174 | * Matching xfer_mode, 0xff if no match found. | |
3175 | */ | |
3176 | u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) | |
3177 | { | |
3178 | u8 base_mode = 0xff, last_mode = 0xff; | |
3179 | const struct ata_xfer_ent *ent; | |
3180 | const struct ata_timing *t; | |
3181 | ||
3182 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
3183 | if (ent->shift == xfer_shift) | |
3184 | base_mode = ent->base; | |
3185 | ||
3186 | for (t = ata_timing_find_mode(base_mode); | |
3187 | t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { | |
3188 | unsigned short this_cycle; | |
3189 | ||
3190 | switch (xfer_shift) { | |
3191 | case ATA_SHIFT_PIO: | |
3192 | case ATA_SHIFT_MWDMA: | |
3193 | this_cycle = t->cycle; | |
3194 | break; | |
3195 | case ATA_SHIFT_UDMA: | |
3196 | this_cycle = t->udma; | |
3197 | break; | |
3198 | default: | |
3199 | return 0xff; | |
3200 | } | |
3201 | ||
3202 | if (cycle > this_cycle) | |
3203 | break; | |
3204 | ||
3205 | last_mode = t->mode; | |
3206 | } | |
3207 | ||
3208 | return last_mode; | |
3209 | } | |
3210 | ||
cf176e1a TH |
3211 | /** |
3212 | * ata_down_xfermask_limit - adjust dev xfer masks downward | |
cf176e1a | 3213 | * @dev: Device to adjust xfer masks |
458337db | 3214 | * @sel: ATA_DNXFER_* selector |
cf176e1a TH |
3215 | * |
3216 | * Adjust xfer masks of @dev downward. Note that this function | |
3217 | * does not apply the change. Invoking ata_set_mode() afterwards | |
3218 | * will apply the limit. | |
3219 | * | |
3220 | * LOCKING: | |
3221 | * Inherited from caller. | |
3222 | * | |
3223 | * RETURNS: | |
3224 | * 0 on success, negative errno on failure | |
3225 | */ | |
458337db | 3226 | int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
cf176e1a | 3227 | { |
458337db | 3228 | char buf[32]; |
7dc951ae TH |
3229 | unsigned long orig_mask, xfer_mask; |
3230 | unsigned long pio_mask, mwdma_mask, udma_mask; | |
458337db | 3231 | int quiet, highbit; |
cf176e1a | 3232 | |
458337db TH |
3233 | quiet = !!(sel & ATA_DNXFER_QUIET); |
3234 | sel &= ~ATA_DNXFER_QUIET; | |
cf176e1a | 3235 | |
458337db TH |
3236 | xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
3237 | dev->mwdma_mask, | |
3238 | dev->udma_mask); | |
3239 | ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); | |
cf176e1a | 3240 | |
458337db TH |
3241 | switch (sel) { |
3242 | case ATA_DNXFER_PIO: | |
3243 | highbit = fls(pio_mask) - 1; | |
3244 | pio_mask &= ~(1 << highbit); | |
3245 | break; | |
3246 | ||
3247 | case ATA_DNXFER_DMA: | |
3248 | if (udma_mask) { | |
3249 | highbit = fls(udma_mask) - 1; | |
3250 | udma_mask &= ~(1 << highbit); | |
3251 | if (!udma_mask) | |
3252 | return -ENOENT; | |
3253 | } else if (mwdma_mask) { | |
3254 | highbit = fls(mwdma_mask) - 1; | |
3255 | mwdma_mask &= ~(1 << highbit); | |
3256 | if (!mwdma_mask) | |
3257 | return -ENOENT; | |
3258 | } | |
3259 | break; | |
3260 | ||
3261 | case ATA_DNXFER_40C: | |
3262 | udma_mask &= ATA_UDMA_MASK_40C; | |
3263 | break; | |
3264 | ||
3265 | case ATA_DNXFER_FORCE_PIO0: | |
3266 | pio_mask &= 1; | |
3267 | case ATA_DNXFER_FORCE_PIO: | |
3268 | mwdma_mask = 0; | |
3269 | udma_mask = 0; | |
3270 | break; | |
3271 | ||
458337db TH |
3272 | default: |
3273 | BUG(); | |
3274 | } | |
3275 | ||
3276 | xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
3277 | ||
3278 | if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) | |
3279 | return -ENOENT; | |
3280 | ||
3281 | if (!quiet) { | |
3282 | if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) | |
3283 | snprintf(buf, sizeof(buf), "%s:%s", | |
3284 | ata_mode_string(xfer_mask), | |
3285 | ata_mode_string(xfer_mask & ATA_MASK_PIO)); | |
3286 | else | |
3287 | snprintf(buf, sizeof(buf), "%s", | |
3288 | ata_mode_string(xfer_mask)); | |
3289 | ||
3290 | ata_dev_printk(dev, KERN_WARNING, | |
3291 | "limiting speed to %s\n", buf); | |
3292 | } | |
cf176e1a TH |
3293 | |
3294 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, | |
3295 | &dev->udma_mask); | |
3296 | ||
cf176e1a | 3297 | return 0; |
cf176e1a TH |
3298 | } |
3299 | ||
3373efd8 | 3300 | static int ata_dev_set_mode(struct ata_device *dev) |
1da177e4 | 3301 | { |
9af5c9c9 | 3302 | struct ata_eh_context *ehc = &dev->link->eh_context; |
4055dee7 TH |
3303 | const char *dev_err_whine = ""; |
3304 | int ign_dev_err = 0; | |
83206a29 TH |
3305 | unsigned int err_mask; |
3306 | int rc; | |
1da177e4 | 3307 | |
e8384607 | 3308 | dev->flags &= ~ATA_DFLAG_PIO; |
1da177e4 LT |
3309 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
3310 | dev->flags |= ATA_DFLAG_PIO; | |
3311 | ||
3373efd8 | 3312 | err_mask = ata_dev_set_xfermode(dev); |
2dcb407e | 3313 | |
4055dee7 TH |
3314 | if (err_mask & ~AC_ERR_DEV) |
3315 | goto fail; | |
3316 | ||
3317 | /* revalidate */ | |
3318 | ehc->i.flags |= ATA_EHI_POST_SETMODE; | |
3319 | rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); | |
3320 | ehc->i.flags &= ~ATA_EHI_POST_SETMODE; | |
3321 | if (rc) | |
3322 | return rc; | |
3323 | ||
11750a40 A |
3324 | /* Old CFA may refuse this command, which is just fine */ |
3325 | if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) | |
4055dee7 | 3326 | ign_dev_err = 1; |
2dcb407e | 3327 | |
0bc2a79a AC |
3328 | /* Some very old devices and some bad newer ones fail any kind of |
3329 | SET_XFERMODE request but support PIO0-2 timings and no IORDY */ | |
3330 | if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) && | |
3331 | dev->pio_mode <= XFER_PIO_2) | |
4055dee7 | 3332 | ign_dev_err = 1; |
2dcb407e | 3333 | |
3acaf94b AC |
3334 | /* Early MWDMA devices do DMA but don't allow DMA mode setting. |
3335 | Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ | |
c5038fc0 | 3336 | if (dev->xfer_shift == ATA_SHIFT_MWDMA && |
3acaf94b AC |
3337 | dev->dma_mode == XFER_MW_DMA_0 && |
3338 | (dev->id[63] >> 8) & 1) | |
4055dee7 | 3339 | ign_dev_err = 1; |
3acaf94b | 3340 | |
4055dee7 TH |
3341 | /* if the device is actually configured correctly, ignore dev err */ |
3342 | if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) | |
3343 | ign_dev_err = 1; | |
1da177e4 | 3344 | |
4055dee7 TH |
3345 | if (err_mask & AC_ERR_DEV) { |
3346 | if (!ign_dev_err) | |
3347 | goto fail; | |
3348 | else | |
3349 | dev_err_whine = " (device error ignored)"; | |
3350 | } | |
48a8a14f | 3351 | |
23e71c3d TH |
3352 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
3353 | dev->xfer_shift, (int)dev->xfer_mode); | |
1da177e4 | 3354 | |
4055dee7 TH |
3355 | ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n", |
3356 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), | |
3357 | dev_err_whine); | |
3358 | ||
83206a29 | 3359 | return 0; |
4055dee7 TH |
3360 | |
3361 | fail: | |
3362 | ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " | |
3363 | "(err_mask=0x%x)\n", err_mask); | |
3364 | return -EIO; | |
1da177e4 LT |
3365 | } |
3366 | ||
1da177e4 | 3367 | /** |
04351821 | 3368 | * ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
0260731f | 3369 | * @link: link on which timings will be programmed |
1967b7ff | 3370 | * @r_failed_dev: out parameter for failed device |
1da177e4 | 3371 | * |
04351821 A |
3372 | * Standard implementation of the function used to tune and set |
3373 | * ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3374 | * ata_dev_set_mode() fails, pointer to the failing device is | |
e82cbdb9 | 3375 | * returned in @r_failed_dev. |
780a87f7 | 3376 | * |
1da177e4 | 3377 | * LOCKING: |
0cba632b | 3378 | * PCI/etc. bus probe sem. |
e82cbdb9 TH |
3379 | * |
3380 | * RETURNS: | |
3381 | * 0 on success, negative errno otherwise | |
1da177e4 | 3382 | */ |
04351821 | 3383 | |
0260731f | 3384 | int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
1da177e4 | 3385 | { |
0260731f | 3386 | struct ata_port *ap = link->ap; |
e8e0619f | 3387 | struct ata_device *dev; |
f58229f8 | 3388 | int rc = 0, used_dma = 0, found = 0; |
3adcebb2 | 3389 | |
a6d5a51c | 3390 | /* step 1: calculate xfer_mask */ |
f58229f8 | 3391 | ata_link_for_each_dev(dev, link) { |
7dc951ae | 3392 | unsigned long pio_mask, dma_mask; |
b3a70601 | 3393 | unsigned int mode_mask; |
a6d5a51c | 3394 | |
e1211e3f | 3395 | if (!ata_dev_enabled(dev)) |
a6d5a51c TH |
3396 | continue; |
3397 | ||
b3a70601 AC |
3398 | mode_mask = ATA_DMA_MASK_ATA; |
3399 | if (dev->class == ATA_DEV_ATAPI) | |
3400 | mode_mask = ATA_DMA_MASK_ATAPI; | |
3401 | else if (ata_id_is_cfa(dev->id)) | |
3402 | mode_mask = ATA_DMA_MASK_CFA; | |
3403 | ||
3373efd8 | 3404 | ata_dev_xfermask(dev); |
33267325 | 3405 | ata_force_xfermask(dev); |
1da177e4 | 3406 | |
acf356b1 TH |
3407 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
3408 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
b3a70601 AC |
3409 | |
3410 | if (libata_dma_mask & mode_mask) | |
3411 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
3412 | else | |
3413 | dma_mask = 0; | |
3414 | ||
acf356b1 TH |
3415 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); |
3416 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
5444a6f4 | 3417 | |
4f65977d | 3418 | found = 1; |
70cd071e | 3419 | if (dev->dma_mode != 0xff) |
5444a6f4 | 3420 | used_dma = 1; |
a6d5a51c | 3421 | } |
4f65977d | 3422 | if (!found) |
e82cbdb9 | 3423 | goto out; |
a6d5a51c TH |
3424 | |
3425 | /* step 2: always set host PIO timings */ | |
f58229f8 | 3426 | ata_link_for_each_dev(dev, link) { |
e8e0619f TH |
3427 | if (!ata_dev_enabled(dev)) |
3428 | continue; | |
3429 | ||
70cd071e | 3430 | if (dev->pio_mode == 0xff) { |
f15a1daf | 3431 | ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); |
e8e0619f | 3432 | rc = -EINVAL; |
e82cbdb9 | 3433 | goto out; |
e8e0619f TH |
3434 | } |
3435 | ||
3436 | dev->xfer_mode = dev->pio_mode; | |
3437 | dev->xfer_shift = ATA_SHIFT_PIO; | |
3438 | if (ap->ops->set_piomode) | |
3439 | ap->ops->set_piomode(ap, dev); | |
3440 | } | |
1da177e4 | 3441 | |
a6d5a51c | 3442 | /* step 3: set host DMA timings */ |
f58229f8 | 3443 | ata_link_for_each_dev(dev, link) { |
70cd071e | 3444 | if (!ata_dev_enabled(dev) || dev->dma_mode == 0xff) |
e8e0619f TH |
3445 | continue; |
3446 | ||
3447 | dev->xfer_mode = dev->dma_mode; | |
3448 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
3449 | if (ap->ops->set_dmamode) | |
3450 | ap->ops->set_dmamode(ap, dev); | |
3451 | } | |
1da177e4 LT |
3452 | |
3453 | /* step 4: update devices' xfer mode */ | |
f58229f8 | 3454 | ata_link_for_each_dev(dev, link) { |
18d90deb | 3455 | /* don't update suspended devices' xfer mode */ |
9666f400 | 3456 | if (!ata_dev_enabled(dev)) |
83206a29 TH |
3457 | continue; |
3458 | ||
3373efd8 | 3459 | rc = ata_dev_set_mode(dev); |
5bbc53f4 | 3460 | if (rc) |
e82cbdb9 | 3461 | goto out; |
83206a29 | 3462 | } |
1da177e4 | 3463 | |
e8e0619f TH |
3464 | /* Record simplex status. If we selected DMA then the other |
3465 | * host channels are not permitted to do so. | |
5444a6f4 | 3466 | */ |
cca3974e | 3467 | if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
032af1ce | 3468 | ap->host->simplex_claimed = ap; |
5444a6f4 | 3469 | |
e82cbdb9 TH |
3470 | out: |
3471 | if (rc) | |
3472 | *r_failed_dev = dev; | |
3473 | return rc; | |
1da177e4 LT |
3474 | } |
3475 | ||
1fdffbce JG |
3476 | /** |
3477 | * ata_tf_to_host - issue ATA taskfile to host controller | |
3478 | * @ap: port to which command is being issued | |
3479 | * @tf: ATA taskfile register set | |
3480 | * | |
3481 | * Issues ATA taskfile register set to ATA host controller, | |
3482 | * with proper synchronization with interrupt handler and | |
3483 | * other threads. | |
3484 | * | |
3485 | * LOCKING: | |
cca3974e | 3486 | * spin_lock_irqsave(host lock) |
1fdffbce JG |
3487 | */ |
3488 | ||
3489 | static inline void ata_tf_to_host(struct ata_port *ap, | |
3490 | const struct ata_taskfile *tf) | |
3491 | { | |
3492 | ap->ops->tf_load(ap, tf); | |
3493 | ap->ops->exec_command(ap, tf); | |
3494 | } | |
3495 | ||
1da177e4 LT |
3496 | /** |
3497 | * ata_busy_sleep - sleep until BSY clears, or timeout | |
3498 | * @ap: port containing status register to be polled | |
3499 | * @tmout_pat: impatience timeout | |
3500 | * @tmout: overall timeout | |
3501 | * | |
780a87f7 JG |
3502 | * Sleep until ATA Status register bit BSY clears, |
3503 | * or a timeout occurs. | |
3504 | * | |
d1adc1bb TH |
3505 | * LOCKING: |
3506 | * Kernel thread context (may sleep). | |
3507 | * | |
3508 | * RETURNS: | |
3509 | * 0 on success, -errno otherwise. | |
1da177e4 | 3510 | */ |
d1adc1bb TH |
3511 | int ata_busy_sleep(struct ata_port *ap, |
3512 | unsigned long tmout_pat, unsigned long tmout) | |
1da177e4 LT |
3513 | { |
3514 | unsigned long timer_start, timeout; | |
3515 | u8 status; | |
3516 | ||
3517 | status = ata_busy_wait(ap, ATA_BUSY, 300); | |
3518 | timer_start = jiffies; | |
3519 | timeout = timer_start + tmout_pat; | |
d1adc1bb TH |
3520 | while (status != 0xff && (status & ATA_BUSY) && |
3521 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
3522 | msleep(50); |
3523 | status = ata_busy_wait(ap, ATA_BUSY, 3); | |
3524 | } | |
3525 | ||
d1adc1bb | 3526 | if (status != 0xff && (status & ATA_BUSY)) |
f15a1daf | 3527 | ata_port_printk(ap, KERN_WARNING, |
35aa7a43 JG |
3528 | "port is slow to respond, please be patient " |
3529 | "(Status 0x%x)\n", status); | |
1da177e4 LT |
3530 | |
3531 | timeout = timer_start + tmout; | |
d1adc1bb TH |
3532 | while (status != 0xff && (status & ATA_BUSY) && |
3533 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
3534 | msleep(50); |
3535 | status = ata_chk_status(ap); | |
3536 | } | |
3537 | ||
d1adc1bb TH |
3538 | if (status == 0xff) |
3539 | return -ENODEV; | |
3540 | ||
1da177e4 | 3541 | if (status & ATA_BUSY) { |
f15a1daf | 3542 | ata_port_printk(ap, KERN_ERR, "port failed to respond " |
35aa7a43 JG |
3543 | "(%lu secs, Status 0x%x)\n", |
3544 | tmout / HZ, status); | |
d1adc1bb | 3545 | return -EBUSY; |
1da177e4 LT |
3546 | } |
3547 | ||
3548 | return 0; | |
3549 | } | |
3550 | ||
88ff6eaf TH |
3551 | /** |
3552 | * ata_wait_after_reset - wait before checking status after reset | |
3553 | * @ap: port containing status register to be polled | |
3554 | * @deadline: deadline jiffies for the operation | |
3555 | * | |
3556 | * After reset, we need to pause a while before reading status. | |
3557 | * Also, certain combination of controller and device report 0xff | |
3558 | * for some duration (e.g. until SATA PHY is up and running) | |
3559 | * which is interpreted as empty port in ATA world. This | |
3560 | * function also waits for such devices to get out of 0xff | |
3561 | * status. | |
3562 | * | |
3563 | * LOCKING: | |
3564 | * Kernel thread context (may sleep). | |
3565 | */ | |
3566 | void ata_wait_after_reset(struct ata_port *ap, unsigned long deadline) | |
3567 | { | |
3568 | unsigned long until = jiffies + ATA_TMOUT_FF_WAIT; | |
3569 | ||
3570 | if (time_before(until, deadline)) | |
3571 | deadline = until; | |
3572 | ||
3573 | /* Spec mandates ">= 2ms" before checking status. We wait | |
3574 | * 150ms, because that was the magic delay used for ATAPI | |
3575 | * devices in Hale Landis's ATADRVR, for the period of time | |
3576 | * between when the ATA command register is written, and then | |
3577 | * status is checked. Because waiting for "a while" before | |
3578 | * checking status is fine, post SRST, we perform this magic | |
3579 | * delay here as well. | |
3580 | * | |
3581 | * Old drivers/ide uses the 2mS rule and then waits for ready. | |
3582 | */ | |
3583 | msleep(150); | |
3584 | ||
3585 | /* Wait for 0xff to clear. Some SATA devices take a long time | |
3586 | * to clear 0xff after reset. For example, HHD424020F7SV00 | |
3587 | * iVDR needs >= 800ms while. Quantum GoVault needs even more | |
3588 | * than that. | |
1974e201 TH |
3589 | * |
3590 | * Note that some PATA controllers (pata_ali) explode if | |
3591 | * status register is read more than once when there's no | |
3592 | * device attached. | |
88ff6eaf | 3593 | */ |
1974e201 TH |
3594 | if (ap->flags & ATA_FLAG_SATA) { |
3595 | while (1) { | |
3596 | u8 status = ata_chk_status(ap); | |
88ff6eaf | 3597 | |
1974e201 TH |
3598 | if (status != 0xff || time_after(jiffies, deadline)) |
3599 | return; | |
88ff6eaf | 3600 | |
1974e201 TH |
3601 | msleep(50); |
3602 | } | |
88ff6eaf TH |
3603 | } |
3604 | } | |
3605 | ||
d4b2bab4 TH |
3606 | /** |
3607 | * ata_wait_ready - sleep until BSY clears, or timeout | |
3608 | * @ap: port containing status register to be polled | |
3609 | * @deadline: deadline jiffies for the operation | |
3610 | * | |
3611 | * Sleep until ATA Status register bit BSY clears, or timeout | |
3612 | * occurs. | |
3613 | * | |
3614 | * LOCKING: | |
3615 | * Kernel thread context (may sleep). | |
3616 | * | |
3617 | * RETURNS: | |
3618 | * 0 on success, -errno otherwise. | |
3619 | */ | |
3620 | int ata_wait_ready(struct ata_port *ap, unsigned long deadline) | |
3621 | { | |
3622 | unsigned long start = jiffies; | |
3623 | int warned = 0; | |
3624 | ||
3625 | while (1) { | |
3626 | u8 status = ata_chk_status(ap); | |
3627 | unsigned long now = jiffies; | |
3628 | ||
3629 | if (!(status & ATA_BUSY)) | |
3630 | return 0; | |
936fd732 | 3631 | if (!ata_link_online(&ap->link) && status == 0xff) |
d4b2bab4 TH |
3632 | return -ENODEV; |
3633 | if (time_after(now, deadline)) | |
3634 | return -EBUSY; | |
3635 | ||
3636 | if (!warned && time_after(now, start + 5 * HZ) && | |
3637 | (deadline - now > 3 * HZ)) { | |
3638 | ata_port_printk(ap, KERN_WARNING, | |
3639 | "port is slow to respond, please be patient " | |
3640 | "(Status 0x%x)\n", status); | |
3641 | warned = 1; | |
3642 | } | |
3643 | ||
3644 | msleep(50); | |
3645 | } | |
3646 | } | |
3647 | ||
3648 | static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask, | |
3649 | unsigned long deadline) | |
1da177e4 LT |
3650 | { |
3651 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
3652 | unsigned int dev0 = devmask & (1 << 0); | |
3653 | unsigned int dev1 = devmask & (1 << 1); | |
9b89391c | 3654 | int rc, ret = 0; |
1da177e4 LT |
3655 | |
3656 | /* if device 0 was found in ata_devchk, wait for its | |
3657 | * BSY bit to clear | |
3658 | */ | |
d4b2bab4 TH |
3659 | if (dev0) { |
3660 | rc = ata_wait_ready(ap, deadline); | |
9b89391c TH |
3661 | if (rc) { |
3662 | if (rc != -ENODEV) | |
3663 | return rc; | |
3664 | ret = rc; | |
3665 | } | |
d4b2bab4 | 3666 | } |
1da177e4 | 3667 | |
e141d999 TH |
3668 | /* if device 1 was found in ata_devchk, wait for register |
3669 | * access briefly, then wait for BSY to clear. | |
1da177e4 | 3670 | */ |
e141d999 TH |
3671 | if (dev1) { |
3672 | int i; | |
1da177e4 LT |
3673 | |
3674 | ap->ops->dev_select(ap, 1); | |
e141d999 TH |
3675 | |
3676 | /* Wait for register access. Some ATAPI devices fail | |
3677 | * to set nsect/lbal after reset, so don't waste too | |
3678 | * much time on it. We're gonna wait for !BSY anyway. | |
3679 | */ | |
3680 | for (i = 0; i < 2; i++) { | |
3681 | u8 nsect, lbal; | |
3682 | ||
3683 | nsect = ioread8(ioaddr->nsect_addr); | |
3684 | lbal = ioread8(ioaddr->lbal_addr); | |
3685 | if ((nsect == 1) && (lbal == 1)) | |
3686 | break; | |
3687 | msleep(50); /* give drive a breather */ | |
3688 | } | |
3689 | ||
d4b2bab4 | 3690 | rc = ata_wait_ready(ap, deadline); |
9b89391c TH |
3691 | if (rc) { |
3692 | if (rc != -ENODEV) | |
3693 | return rc; | |
3694 | ret = rc; | |
3695 | } | |
d4b2bab4 | 3696 | } |
1da177e4 LT |
3697 | |
3698 | /* is all this really necessary? */ | |
3699 | ap->ops->dev_select(ap, 0); | |
3700 | if (dev1) | |
3701 | ap->ops->dev_select(ap, 1); | |
3702 | if (dev0) | |
3703 | ap->ops->dev_select(ap, 0); | |
d4b2bab4 | 3704 | |
9b89391c | 3705 | return ret; |
1da177e4 LT |
3706 | } |
3707 | ||
d4b2bab4 TH |
3708 | static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask, |
3709 | unsigned long deadline) | |
1da177e4 LT |
3710 | { |
3711 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
3712 | ||
44877b4e | 3713 | DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); |
1da177e4 LT |
3714 | |
3715 | /* software reset. causes dev0 to be selected */ | |
0d5ff566 TH |
3716 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
3717 | udelay(20); /* FIXME: flush */ | |
3718 | iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); | |
3719 | udelay(20); /* FIXME: flush */ | |
3720 | iowrite8(ap->ctl, ioaddr->ctl_addr); | |
1da177e4 | 3721 | |
88ff6eaf TH |
3722 | /* wait a while before checking status */ |
3723 | ata_wait_after_reset(ap, deadline); | |
1da177e4 | 3724 | |
2e9edbf8 | 3725 | /* Before we perform post reset processing we want to see if |
298a41ca TH |
3726 | * the bus shows 0xFF because the odd clown forgets the D7 |
3727 | * pulldown resistor. | |
3728 | */ | |
150981b0 | 3729 | if (ata_chk_status(ap) == 0xFF) |
9b89391c | 3730 | return -ENODEV; |
09c7ad79 | 3731 | |
d4b2bab4 | 3732 | return ata_bus_post_reset(ap, devmask, deadline); |
1da177e4 LT |
3733 | } |
3734 | ||
3735 | /** | |
3736 | * ata_bus_reset - reset host port and associated ATA channel | |
3737 | * @ap: port to reset | |
3738 | * | |
3739 | * This is typically the first time we actually start issuing | |
3740 | * commands to the ATA channel. We wait for BSY to clear, then | |
3741 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its | |
3742 | * result. Determine what devices, if any, are on the channel | |
3743 | * by looking at the device 0/1 error register. Look at the signature | |
3744 | * stored in each device's taskfile registers, to determine if | |
3745 | * the device is ATA or ATAPI. | |
3746 | * | |
3747 | * LOCKING: | |
0cba632b | 3748 | * PCI/etc. bus probe sem. |
cca3974e | 3749 | * Obtains host lock. |
1da177e4 LT |
3750 | * |
3751 | * SIDE EFFECTS: | |
198e0fed | 3752 | * Sets ATA_FLAG_DISABLED if bus reset fails. |
1da177e4 LT |
3753 | */ |
3754 | ||
3755 | void ata_bus_reset(struct ata_port *ap) | |
3756 | { | |
9af5c9c9 | 3757 | struct ata_device *device = ap->link.device; |
1da177e4 LT |
3758 | struct ata_ioports *ioaddr = &ap->ioaddr; |
3759 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
3760 | u8 err; | |
aec5c3c1 | 3761 | unsigned int dev0, dev1 = 0, devmask = 0; |
9b89391c | 3762 | int rc; |
1da177e4 | 3763 | |
44877b4e | 3764 | DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no); |
1da177e4 LT |
3765 | |
3766 | /* determine if device 0/1 are present */ | |
3767 | if (ap->flags & ATA_FLAG_SATA_RESET) | |
3768 | dev0 = 1; | |
3769 | else { | |
3770 | dev0 = ata_devchk(ap, 0); | |
3771 | if (slave_possible) | |
3772 | dev1 = ata_devchk(ap, 1); | |
3773 | } | |
3774 | ||
3775 | if (dev0) | |
3776 | devmask |= (1 << 0); | |
3777 | if (dev1) | |
3778 | devmask |= (1 << 1); | |
3779 | ||
3780 | /* select device 0 again */ | |
3781 | ap->ops->dev_select(ap, 0); | |
3782 | ||
3783 | /* issue bus reset */ | |
9b89391c TH |
3784 | if (ap->flags & ATA_FLAG_SRST) { |
3785 | rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ); | |
3786 | if (rc && rc != -ENODEV) | |
aec5c3c1 | 3787 | goto err_out; |
9b89391c | 3788 | } |
1da177e4 LT |
3789 | |
3790 | /* | |
3791 | * determine by signature whether we have ATA or ATAPI devices | |
3792 | */ | |
3f19859e | 3793 | device[0].class = ata_dev_try_classify(&device[0], dev0, &err); |
1da177e4 | 3794 | if ((slave_possible) && (err != 0x81)) |
3f19859e | 3795 | device[1].class = ata_dev_try_classify(&device[1], dev1, &err); |
1da177e4 | 3796 | |
1da177e4 | 3797 | /* is double-select really necessary? */ |
9af5c9c9 | 3798 | if (device[1].class != ATA_DEV_NONE) |
1da177e4 | 3799 | ap->ops->dev_select(ap, 1); |
9af5c9c9 | 3800 | if (device[0].class != ATA_DEV_NONE) |
1da177e4 LT |
3801 | ap->ops->dev_select(ap, 0); |
3802 | ||
3803 | /* if no devices were detected, disable this port */ | |
9af5c9c9 TH |
3804 | if ((device[0].class == ATA_DEV_NONE) && |
3805 | (device[1].class == ATA_DEV_NONE)) | |
1da177e4 LT |
3806 | goto err_out; |
3807 | ||
3808 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { | |
3809 | /* set up device control for ATA_FLAG_SATA_RESET */ | |
0d5ff566 | 3810 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
1da177e4 LT |
3811 | } |
3812 | ||
3813 | DPRINTK("EXIT\n"); | |
3814 | return; | |
3815 | ||
3816 | err_out: | |
f15a1daf | 3817 | ata_port_printk(ap, KERN_ERR, "disabling port\n"); |
ac8869d5 | 3818 | ata_port_disable(ap); |
1da177e4 LT |
3819 | |
3820 | DPRINTK("EXIT\n"); | |
3821 | } | |
3822 | ||
d7bb4cc7 | 3823 | /** |
936fd732 TH |
3824 | * sata_link_debounce - debounce SATA phy status |
3825 | * @link: ATA link to debounce SATA phy status for | |
d7bb4cc7 | 3826 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3827 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3828 | * |
936fd732 | 3829 | * Make sure SStatus of @link reaches stable state, determined by |
d7bb4cc7 TH |
3830 | * holding the same value where DET is not 1 for @duration polled |
3831 | * every @interval, before @timeout. Timeout constraints the | |
d4b2bab4 TH |
3832 | * beginning of the stable state. Because DET gets stuck at 1 on |
3833 | * some controllers after hot unplugging, this functions waits | |
d7bb4cc7 TH |
3834 | * until timeout then returns 0 if DET is stable at 1. |
3835 | * | |
d4b2bab4 TH |
3836 | * @timeout is further limited by @deadline. The sooner of the |
3837 | * two is used. | |
3838 | * | |
d7bb4cc7 TH |
3839 | * LOCKING: |
3840 | * Kernel thread context (may sleep) | |
3841 | * | |
3842 | * RETURNS: | |
3843 | * 0 on success, -errno on failure. | |
3844 | */ | |
936fd732 TH |
3845 | int sata_link_debounce(struct ata_link *link, const unsigned long *params, |
3846 | unsigned long deadline) | |
7a7921e8 | 3847 | { |
d7bb4cc7 | 3848 | unsigned long interval_msec = params[0]; |
d4b2bab4 TH |
3849 | unsigned long duration = msecs_to_jiffies(params[1]); |
3850 | unsigned long last_jiffies, t; | |
d7bb4cc7 TH |
3851 | u32 last, cur; |
3852 | int rc; | |
3853 | ||
d4b2bab4 TH |
3854 | t = jiffies + msecs_to_jiffies(params[2]); |
3855 | if (time_before(t, deadline)) | |
3856 | deadline = t; | |
3857 | ||
936fd732 | 3858 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3859 | return rc; |
3860 | cur &= 0xf; | |
3861 | ||
3862 | last = cur; | |
3863 | last_jiffies = jiffies; | |
3864 | ||
3865 | while (1) { | |
3866 | msleep(interval_msec); | |
936fd732 | 3867 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3868 | return rc; |
3869 | cur &= 0xf; | |
3870 | ||
3871 | /* DET stable? */ | |
3872 | if (cur == last) { | |
d4b2bab4 | 3873 | if (cur == 1 && time_before(jiffies, deadline)) |
d7bb4cc7 TH |
3874 | continue; |
3875 | if (time_after(jiffies, last_jiffies + duration)) | |
3876 | return 0; | |
3877 | continue; | |
3878 | } | |
3879 | ||
3880 | /* unstable, start over */ | |
3881 | last = cur; | |
3882 | last_jiffies = jiffies; | |
3883 | ||
f1545154 TH |
3884 | /* Check deadline. If debouncing failed, return |
3885 | * -EPIPE to tell upper layer to lower link speed. | |
3886 | */ | |
d4b2bab4 | 3887 | if (time_after(jiffies, deadline)) |
f1545154 | 3888 | return -EPIPE; |
d7bb4cc7 TH |
3889 | } |
3890 | } | |
3891 | ||
3892 | /** | |
936fd732 TH |
3893 | * sata_link_resume - resume SATA link |
3894 | * @link: ATA link to resume SATA | |
d7bb4cc7 | 3895 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3896 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3897 | * |
936fd732 | 3898 | * Resume SATA phy @link and debounce it. |
d7bb4cc7 TH |
3899 | * |
3900 | * LOCKING: | |
3901 | * Kernel thread context (may sleep) | |
3902 | * | |
3903 | * RETURNS: | |
3904 | * 0 on success, -errno on failure. | |
3905 | */ | |
936fd732 TH |
3906 | int sata_link_resume(struct ata_link *link, const unsigned long *params, |
3907 | unsigned long deadline) | |
d7bb4cc7 TH |
3908 | { |
3909 | u32 scontrol; | |
81952c54 TH |
3910 | int rc; |
3911 | ||
936fd732 | 3912 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 3913 | return rc; |
7a7921e8 | 3914 | |
852ee16a | 3915 | scontrol = (scontrol & 0x0f0) | 0x300; |
81952c54 | 3916 | |
936fd732 | 3917 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 | 3918 | return rc; |
7a7921e8 | 3919 | |
d7bb4cc7 TH |
3920 | /* Some PHYs react badly if SStatus is pounded immediately |
3921 | * after resuming. Delay 200ms before debouncing. | |
3922 | */ | |
3923 | msleep(200); | |
7a7921e8 | 3924 | |
936fd732 | 3925 | return sata_link_debounce(link, params, deadline); |
7a7921e8 TH |
3926 | } |
3927 | ||
f5914a46 TH |
3928 | /** |
3929 | * ata_std_prereset - prepare for reset | |
cc0680a5 | 3930 | * @link: ATA link to be reset |
d4b2bab4 | 3931 | * @deadline: deadline jiffies for the operation |
f5914a46 | 3932 | * |
cc0680a5 | 3933 | * @link is about to be reset. Initialize it. Failure from |
b8cffc6a TH |
3934 | * prereset makes libata abort whole reset sequence and give up |
3935 | * that port, so prereset should be best-effort. It does its | |
3936 | * best to prepare for reset sequence but if things go wrong, it | |
3937 | * should just whine, not fail. | |
f5914a46 TH |
3938 | * |
3939 | * LOCKING: | |
3940 | * Kernel thread context (may sleep) | |
3941 | * | |
3942 | * RETURNS: | |
3943 | * 0 on success, -errno otherwise. | |
3944 | */ | |
cc0680a5 | 3945 | int ata_std_prereset(struct ata_link *link, unsigned long deadline) |
f5914a46 | 3946 | { |
cc0680a5 | 3947 | struct ata_port *ap = link->ap; |
936fd732 | 3948 | struct ata_eh_context *ehc = &link->eh_context; |
e9c83914 | 3949 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
f5914a46 TH |
3950 | int rc; |
3951 | ||
f5914a46 TH |
3952 | /* if we're about to do hardreset, nothing more to do */ |
3953 | if (ehc->i.action & ATA_EH_HARDRESET) | |
3954 | return 0; | |
3955 | ||
936fd732 | 3956 | /* if SATA, resume link */ |
a16abc0b | 3957 | if (ap->flags & ATA_FLAG_SATA) { |
936fd732 | 3958 | rc = sata_link_resume(link, timing, deadline); |
b8cffc6a TH |
3959 | /* whine about phy resume failure but proceed */ |
3960 | if (rc && rc != -EOPNOTSUPP) | |
cc0680a5 | 3961 | ata_link_printk(link, KERN_WARNING, "failed to resume " |
f5914a46 | 3962 | "link for reset (errno=%d)\n", rc); |
f5914a46 TH |
3963 | } |
3964 | ||
8cebf274 TH |
3965 | /* wait for !BSY if we don't know that no device is attached */ |
3966 | if (!ata_link_offline(link)) { | |
b8cffc6a | 3967 | rc = ata_wait_ready(ap, deadline); |
6dffaf61 | 3968 | if (rc && rc != -ENODEV) { |
cc0680a5 | 3969 | ata_link_printk(link, KERN_WARNING, "device not ready " |
b8cffc6a TH |
3970 | "(errno=%d), forcing hardreset\n", rc); |
3971 | ehc->i.action |= ATA_EH_HARDRESET; | |
3972 | } | |
3973 | } | |
f5914a46 TH |
3974 | |
3975 | return 0; | |
3976 | } | |
3977 | ||
c2bd5804 TH |
3978 | /** |
3979 | * ata_std_softreset - reset host port via ATA SRST | |
cc0680a5 | 3980 | * @link: ATA link to reset |
c2bd5804 | 3981 | * @classes: resulting classes of attached devices |
d4b2bab4 | 3982 | * @deadline: deadline jiffies for the operation |
c2bd5804 | 3983 | * |
52783c5d | 3984 | * Reset host port using ATA SRST. |
c2bd5804 TH |
3985 | * |
3986 | * LOCKING: | |
3987 | * Kernel thread context (may sleep) | |
3988 | * | |
3989 | * RETURNS: | |
3990 | * 0 on success, -errno otherwise. | |
3991 | */ | |
cc0680a5 | 3992 | int ata_std_softreset(struct ata_link *link, unsigned int *classes, |
d4b2bab4 | 3993 | unsigned long deadline) |
c2bd5804 | 3994 | { |
cc0680a5 | 3995 | struct ata_port *ap = link->ap; |
c2bd5804 | 3996 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
d4b2bab4 TH |
3997 | unsigned int devmask = 0; |
3998 | int rc; | |
c2bd5804 TH |
3999 | u8 err; |
4000 | ||
4001 | DPRINTK("ENTER\n"); | |
4002 | ||
936fd732 | 4003 | if (ata_link_offline(link)) { |
3a39746a TH |
4004 | classes[0] = ATA_DEV_NONE; |
4005 | goto out; | |
4006 | } | |
4007 | ||
c2bd5804 TH |
4008 | /* determine if device 0/1 are present */ |
4009 | if (ata_devchk(ap, 0)) | |
4010 | devmask |= (1 << 0); | |
4011 | if (slave_possible && ata_devchk(ap, 1)) | |
4012 | devmask |= (1 << 1); | |
4013 | ||
c2bd5804 TH |
4014 | /* select device 0 again */ |
4015 | ap->ops->dev_select(ap, 0); | |
4016 | ||
4017 | /* issue bus reset */ | |
4018 | DPRINTK("about to softreset, devmask=%x\n", devmask); | |
d4b2bab4 | 4019 | rc = ata_bus_softreset(ap, devmask, deadline); |
9b89391c | 4020 | /* if link is occupied, -ENODEV too is an error */ |
936fd732 | 4021 | if (rc && (rc != -ENODEV || sata_scr_valid(link))) { |
cc0680a5 | 4022 | ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc); |
d4b2bab4 | 4023 | return rc; |
c2bd5804 TH |
4024 | } |
4025 | ||
4026 | /* determine by signature whether we have ATA or ATAPI devices */ | |
3f19859e TH |
4027 | classes[0] = ata_dev_try_classify(&link->device[0], |
4028 | devmask & (1 << 0), &err); | |
c2bd5804 | 4029 | if (slave_possible && err != 0x81) |
3f19859e TH |
4030 | classes[1] = ata_dev_try_classify(&link->device[1], |
4031 | devmask & (1 << 1), &err); | |
c2bd5804 | 4032 | |
3a39746a | 4033 | out: |
c2bd5804 TH |
4034 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
4035 | return 0; | |
4036 | } | |
4037 | ||
4038 | /** | |
cc0680a5 TH |
4039 | * sata_link_hardreset - reset link via SATA phy reset |
4040 | * @link: link to reset | |
b6103f6d | 4041 | * @timing: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 4042 | * @deadline: deadline jiffies for the operation |
c2bd5804 | 4043 | * |
cc0680a5 | 4044 | * SATA phy-reset @link using DET bits of SControl register. |
c2bd5804 TH |
4045 | * |
4046 | * LOCKING: | |
4047 | * Kernel thread context (may sleep) | |
4048 | * | |
4049 | * RETURNS: | |
4050 | * 0 on success, -errno otherwise. | |
4051 | */ | |
cc0680a5 | 4052 | int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, |
d4b2bab4 | 4053 | unsigned long deadline) |
c2bd5804 | 4054 | { |
852ee16a | 4055 | u32 scontrol; |
81952c54 | 4056 | int rc; |
852ee16a | 4057 | |
c2bd5804 TH |
4058 | DPRINTK("ENTER\n"); |
4059 | ||
936fd732 | 4060 | if (sata_set_spd_needed(link)) { |
1c3fae4d TH |
4061 | /* SATA spec says nothing about how to reconfigure |
4062 | * spd. To be on the safe side, turn off phy during | |
4063 | * reconfiguration. This works for at least ICH7 AHCI | |
4064 | * and Sil3124. | |
4065 | */ | |
936fd732 | 4066 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 4067 | goto out; |
81952c54 | 4068 | |
a34b6fc0 | 4069 | scontrol = (scontrol & 0x0f0) | 0x304; |
81952c54 | 4070 | |
936fd732 | 4071 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
b6103f6d | 4072 | goto out; |
1c3fae4d | 4073 | |
936fd732 | 4074 | sata_set_spd(link); |
1c3fae4d TH |
4075 | } |
4076 | ||
4077 | /* issue phy wake/reset */ | |
936fd732 | 4078 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 4079 | goto out; |
81952c54 | 4080 | |
852ee16a | 4081 | scontrol = (scontrol & 0x0f0) | 0x301; |
81952c54 | 4082 | |
936fd732 | 4083 | if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) |
b6103f6d | 4084 | goto out; |
c2bd5804 | 4085 | |
1c3fae4d | 4086 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
c2bd5804 TH |
4087 | * 10.4.2 says at least 1 ms. |
4088 | */ | |
4089 | msleep(1); | |
4090 | ||
936fd732 TH |
4091 | /* bring link back */ |
4092 | rc = sata_link_resume(link, timing, deadline); | |
b6103f6d TH |
4093 | out: |
4094 | DPRINTK("EXIT, rc=%d\n", rc); | |
4095 | return rc; | |
4096 | } | |
4097 | ||
4098 | /** | |
4099 | * sata_std_hardreset - reset host port via SATA phy reset | |
cc0680a5 | 4100 | * @link: link to reset |
b6103f6d | 4101 | * @class: resulting class of attached device |
d4b2bab4 | 4102 | * @deadline: deadline jiffies for the operation |
b6103f6d TH |
4103 | * |
4104 | * SATA phy-reset host port using DET bits of SControl register, | |
4105 | * wait for !BSY and classify the attached device. | |
4106 | * | |
4107 | * LOCKING: | |
4108 | * Kernel thread context (may sleep) | |
4109 | * | |
4110 | * RETURNS: | |
4111 | * 0 on success, -errno otherwise. | |
4112 | */ | |
cc0680a5 | 4113 | int sata_std_hardreset(struct ata_link *link, unsigned int *class, |
d4b2bab4 | 4114 | unsigned long deadline) |
b6103f6d | 4115 | { |
cc0680a5 | 4116 | struct ata_port *ap = link->ap; |
936fd732 | 4117 | const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); |
b6103f6d TH |
4118 | int rc; |
4119 | ||
4120 | DPRINTK("ENTER\n"); | |
4121 | ||
4122 | /* do hardreset */ | |
cc0680a5 | 4123 | rc = sata_link_hardreset(link, timing, deadline); |
b6103f6d | 4124 | if (rc) { |
cc0680a5 | 4125 | ata_link_printk(link, KERN_ERR, |
b6103f6d TH |
4126 | "COMRESET failed (errno=%d)\n", rc); |
4127 | return rc; | |
4128 | } | |
c2bd5804 | 4129 | |
c2bd5804 | 4130 | /* TODO: phy layer with polling, timeouts, etc. */ |
936fd732 | 4131 | if (ata_link_offline(link)) { |
c2bd5804 TH |
4132 | *class = ATA_DEV_NONE; |
4133 | DPRINTK("EXIT, link offline\n"); | |
4134 | return 0; | |
4135 | } | |
4136 | ||
88ff6eaf TH |
4137 | /* wait a while before checking status */ |
4138 | ata_wait_after_reset(ap, deadline); | |
34fee227 | 4139 | |
633273a3 TH |
4140 | /* If PMP is supported, we have to do follow-up SRST. Note |
4141 | * that some PMPs don't send D2H Reg FIS after hardreset at | |
4142 | * all if the first port is empty. Wait for it just for a | |
4143 | * second and request follow-up SRST. | |
4144 | */ | |
4145 | if (ap->flags & ATA_FLAG_PMP) { | |
4146 | ata_wait_ready(ap, jiffies + HZ); | |
4147 | return -EAGAIN; | |
4148 | } | |
4149 | ||
d4b2bab4 | 4150 | rc = ata_wait_ready(ap, deadline); |
9b89391c TH |
4151 | /* link occupied, -ENODEV too is an error */ |
4152 | if (rc) { | |
cc0680a5 | 4153 | ata_link_printk(link, KERN_ERR, |
d4b2bab4 TH |
4154 | "COMRESET failed (errno=%d)\n", rc); |
4155 | return rc; | |
c2bd5804 TH |
4156 | } |
4157 | ||
3a39746a TH |
4158 | ap->ops->dev_select(ap, 0); /* probably unnecessary */ |
4159 | ||
3f19859e | 4160 | *class = ata_dev_try_classify(link->device, 1, NULL); |
c2bd5804 TH |
4161 | |
4162 | DPRINTK("EXIT, class=%u\n", *class); | |
4163 | return 0; | |
4164 | } | |
4165 | ||
4166 | /** | |
4167 | * ata_std_postreset - standard postreset callback | |
cc0680a5 | 4168 | * @link: the target ata_link |
c2bd5804 TH |
4169 | * @classes: classes of attached devices |
4170 | * | |
4171 | * This function is invoked after a successful reset. Note that | |
4172 | * the device might have been reset more than once using | |
4173 | * different reset methods before postreset is invoked. | |
c2bd5804 | 4174 | * |
c2bd5804 TH |
4175 | * LOCKING: |
4176 | * Kernel thread context (may sleep) | |
4177 | */ | |
cc0680a5 | 4178 | void ata_std_postreset(struct ata_link *link, unsigned int *classes) |
c2bd5804 | 4179 | { |
cc0680a5 | 4180 | struct ata_port *ap = link->ap; |
dc2b3515 TH |
4181 | u32 serror; |
4182 | ||
c2bd5804 TH |
4183 | DPRINTK("ENTER\n"); |
4184 | ||
c2bd5804 | 4185 | /* print link status */ |
936fd732 | 4186 | sata_print_link_status(link); |
c2bd5804 | 4187 | |
dc2b3515 | 4188 | /* clear SError */ |
936fd732 TH |
4189 | if (sata_scr_read(link, SCR_ERROR, &serror) == 0) |
4190 | sata_scr_write(link, SCR_ERROR, serror); | |
f7fe7ad4 | 4191 | link->eh_info.serror = 0; |
dc2b3515 | 4192 | |
c2bd5804 TH |
4193 | /* is double-select really necessary? */ |
4194 | if (classes[0] != ATA_DEV_NONE) | |
4195 | ap->ops->dev_select(ap, 1); | |
4196 | if (classes[1] != ATA_DEV_NONE) | |
4197 | ap->ops->dev_select(ap, 0); | |
4198 | ||
3a39746a TH |
4199 | /* bail out if no device is present */ |
4200 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { | |
4201 | DPRINTK("EXIT, no device\n"); | |
4202 | return; | |
4203 | } | |
4204 | ||
4205 | /* set up device control */ | |
0d5ff566 TH |
4206 | if (ap->ioaddr.ctl_addr) |
4207 | iowrite8(ap->ctl, ap->ioaddr.ctl_addr); | |
c2bd5804 TH |
4208 | |
4209 | DPRINTK("EXIT\n"); | |
4210 | } | |
4211 | ||
623a3128 TH |
4212 | /** |
4213 | * ata_dev_same_device - Determine whether new ID matches configured device | |
623a3128 TH |
4214 | * @dev: device to compare against |
4215 | * @new_class: class of the new device | |
4216 | * @new_id: IDENTIFY page of the new device | |
4217 | * | |
4218 | * Compare @new_class and @new_id against @dev and determine | |
4219 | * whether @dev is the device indicated by @new_class and | |
4220 | * @new_id. | |
4221 | * | |
4222 | * LOCKING: | |
4223 | * None. | |
4224 | * | |
4225 | * RETURNS: | |
4226 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
4227 | */ | |
3373efd8 TH |
4228 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
4229 | const u16 *new_id) | |
623a3128 TH |
4230 | { |
4231 | const u16 *old_id = dev->id; | |
a0cf733b TH |
4232 | unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
4233 | unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; | |
623a3128 TH |
4234 | |
4235 | if (dev->class != new_class) { | |
f15a1daf TH |
4236 | ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", |
4237 | dev->class, new_class); | |
623a3128 TH |
4238 | return 0; |
4239 | } | |
4240 | ||
a0cf733b TH |
4241 | ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
4242 | ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); | |
4243 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); | |
4244 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); | |
623a3128 TH |
4245 | |
4246 | if (strcmp(model[0], model[1])) { | |
f15a1daf TH |
4247 | ata_dev_printk(dev, KERN_INFO, "model number mismatch " |
4248 | "'%s' != '%s'\n", model[0], model[1]); | |
623a3128 TH |
4249 | return 0; |
4250 | } | |
4251 | ||
4252 | if (strcmp(serial[0], serial[1])) { | |
f15a1daf TH |
4253 | ata_dev_printk(dev, KERN_INFO, "serial number mismatch " |
4254 | "'%s' != '%s'\n", serial[0], serial[1]); | |
623a3128 TH |
4255 | return 0; |
4256 | } | |
4257 | ||
623a3128 TH |
4258 | return 1; |
4259 | } | |
4260 | ||
4261 | /** | |
fe30911b | 4262 | * ata_dev_reread_id - Re-read IDENTIFY data |
3fae450c | 4263 | * @dev: target ATA device |
bff04647 | 4264 | * @readid_flags: read ID flags |
623a3128 TH |
4265 | * |
4266 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
4267 | * the port. | |
4268 | * | |
4269 | * LOCKING: | |
4270 | * Kernel thread context (may sleep) | |
4271 | * | |
4272 | * RETURNS: | |
4273 | * 0 on success, negative errno otherwise | |
4274 | */ | |
fe30911b | 4275 | int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) |
623a3128 | 4276 | { |
5eb45c02 | 4277 | unsigned int class = dev->class; |
9af5c9c9 | 4278 | u16 *id = (void *)dev->link->ap->sector_buf; |
623a3128 TH |
4279 | int rc; |
4280 | ||
fe635c7e | 4281 | /* read ID data */ |
bff04647 | 4282 | rc = ata_dev_read_id(dev, &class, readid_flags, id); |
623a3128 | 4283 | if (rc) |
fe30911b | 4284 | return rc; |
623a3128 TH |
4285 | |
4286 | /* is the device still there? */ | |
fe30911b TH |
4287 | if (!ata_dev_same_device(dev, class, id)) |
4288 | return -ENODEV; | |
623a3128 | 4289 | |
fe635c7e | 4290 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
fe30911b TH |
4291 | return 0; |
4292 | } | |
4293 | ||
4294 | /** | |
4295 | * ata_dev_revalidate - Revalidate ATA device | |
4296 | * @dev: device to revalidate | |
422c9daa | 4297 | * @new_class: new class code |
fe30911b TH |
4298 | * @readid_flags: read ID flags |
4299 | * | |
4300 | * Re-read IDENTIFY page, make sure @dev is still attached to the | |
4301 | * port and reconfigure it according to the new IDENTIFY page. | |
4302 | * | |
4303 | * LOCKING: | |
4304 | * Kernel thread context (may sleep) | |
4305 | * | |
4306 | * RETURNS: | |
4307 | * 0 on success, negative errno otherwise | |
4308 | */ | |
422c9daa TH |
4309 | int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, |
4310 | unsigned int readid_flags) | |
fe30911b | 4311 | { |
6ddcd3b0 | 4312 | u64 n_sectors = dev->n_sectors; |
fe30911b TH |
4313 | int rc; |
4314 | ||
4315 | if (!ata_dev_enabled(dev)) | |
4316 | return -ENODEV; | |
4317 | ||
422c9daa TH |
4318 | /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ |
4319 | if (ata_class_enabled(new_class) && | |
4320 | new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) { | |
4321 | ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n", | |
4322 | dev->class, new_class); | |
4323 | rc = -ENODEV; | |
4324 | goto fail; | |
4325 | } | |
4326 | ||
fe30911b TH |
4327 | /* re-read ID */ |
4328 | rc = ata_dev_reread_id(dev, readid_flags); | |
4329 | if (rc) | |
4330 | goto fail; | |
623a3128 TH |
4331 | |
4332 | /* configure device according to the new ID */ | |
efdaedc4 | 4333 | rc = ata_dev_configure(dev); |
6ddcd3b0 TH |
4334 | if (rc) |
4335 | goto fail; | |
4336 | ||
4337 | /* verify n_sectors hasn't changed */ | |
b54eebd6 TH |
4338 | if (dev->class == ATA_DEV_ATA && n_sectors && |
4339 | dev->n_sectors != n_sectors) { | |
6ddcd3b0 TH |
4340 | ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " |
4341 | "%llu != %llu\n", | |
4342 | (unsigned long long)n_sectors, | |
4343 | (unsigned long long)dev->n_sectors); | |
8270bec4 TH |
4344 | |
4345 | /* restore original n_sectors */ | |
4346 | dev->n_sectors = n_sectors; | |
4347 | ||
6ddcd3b0 TH |
4348 | rc = -ENODEV; |
4349 | goto fail; | |
4350 | } | |
4351 | ||
4352 | return 0; | |
623a3128 TH |
4353 | |
4354 | fail: | |
f15a1daf | 4355 | ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); |
623a3128 TH |
4356 | return rc; |
4357 | } | |
4358 | ||
6919a0a6 AC |
4359 | struct ata_blacklist_entry { |
4360 | const char *model_num; | |
4361 | const char *model_rev; | |
4362 | unsigned long horkage; | |
4363 | }; | |
4364 | ||
4365 | static const struct ata_blacklist_entry ata_device_blacklist [] = { | |
4366 | /* Devices with DMA related problems under Linux */ | |
4367 | { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, | |
4368 | { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, | |
4369 | { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, | |
4370 | { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, | |
4371 | { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, | |
4372 | { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, | |
4373 | { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, | |
4374 | { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, | |
4375 | { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, | |
4376 | { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, | |
4377 | { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, | |
4378 | { "CRD-84", NULL, ATA_HORKAGE_NODMA }, | |
4379 | { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, | |
4380 | { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, | |
4381 | { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, | |
4382 | { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, | |
4383 | { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, | |
4384 | { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, | |
4385 | { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, | |
4386 | { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, | |
4387 | { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, | |
4388 | { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, | |
4389 | { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, | |
4390 | { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, | |
4391 | { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, | |
4392 | { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, | |
6919a0a6 AC |
4393 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
4394 | { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, | |
2dcb407e | 4395 | { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA }, |
39f19886 | 4396 | { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, |
3af9a77a TH |
4397 | /* Odd clown on sil3726/4726 PMPs */ |
4398 | { "Config Disk", NULL, ATA_HORKAGE_NODMA | | |
4399 | ATA_HORKAGE_SKIP_PM }, | |
6919a0a6 | 4400 | |
18d6e9d5 | 4401 | /* Weird ATAPI devices */ |
40a1d531 | 4402 | { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, |
18d6e9d5 | 4403 | |
6919a0a6 AC |
4404 | /* Devices we expect to fail diagnostics */ |
4405 | ||
4406 | /* Devices where NCQ should be avoided */ | |
4407 | /* NCQ is slow */ | |
2dcb407e | 4408 | { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, |
459ad688 | 4409 | { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, |
09125ea6 TH |
4410 | /* http://thread.gmane.org/gmane.linux.ide/14907 */ |
4411 | { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, | |
7acfaf30 | 4412 | /* NCQ is broken */ |
539cc7c7 | 4413 | { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, |
0e3dbc01 | 4414 | { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, |
da6f0ec2 | 4415 | { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, |
e41bd3e8 | 4416 | { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ }, |
539cc7c7 | 4417 | |
36e337d0 RH |
4418 | /* Blacklist entries taken from Silicon Image 3124/3132 |
4419 | Windows driver .inf file - also several Linux problem reports */ | |
4420 | { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, | |
4421 | { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, | |
4422 | { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, | |
6919a0a6 | 4423 | |
16c55b03 TH |
4424 | /* devices which puke on READ_NATIVE_MAX */ |
4425 | { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, | |
4426 | { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, | |
4427 | { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, | |
4428 | { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, | |
6919a0a6 | 4429 | |
93328e11 AC |
4430 | /* Devices which report 1 sector over size HPA */ |
4431 | { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
4432 | { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
b152fcd3 | 4433 | { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, }, |
93328e11 | 4434 | |
6bbfd53d AC |
4435 | /* Devices which get the IVB wrong */ |
4436 | { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, }, | |
4437 | { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, }, | |
e9f33406 PM |
4438 | { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, }, |
4439 | { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, }, | |
4440 | { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, }, | |
6bbfd53d | 4441 | |
6919a0a6 AC |
4442 | /* End Marker */ |
4443 | { } | |
1da177e4 | 4444 | }; |
2e9edbf8 | 4445 | |
741b7763 | 4446 | static int strn_pattern_cmp(const char *patt, const char *name, int wildchar) |
539cc7c7 JG |
4447 | { |
4448 | const char *p; | |
4449 | int len; | |
4450 | ||
4451 | /* | |
4452 | * check for trailing wildcard: *\0 | |
4453 | */ | |
4454 | p = strchr(patt, wildchar); | |
4455 | if (p && ((*(p + 1)) == 0)) | |
4456 | len = p - patt; | |
317b50b8 | 4457 | else { |
539cc7c7 | 4458 | len = strlen(name); |
317b50b8 AP |
4459 | if (!len) { |
4460 | if (!*patt) | |
4461 | return 0; | |
4462 | return -1; | |
4463 | } | |
4464 | } | |
539cc7c7 JG |
4465 | |
4466 | return strncmp(patt, name, len); | |
4467 | } | |
4468 | ||
75683fe7 | 4469 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev) |
1da177e4 | 4470 | { |
8bfa79fc TH |
4471 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
4472 | unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; | |
6919a0a6 | 4473 | const struct ata_blacklist_entry *ad = ata_device_blacklist; |
3a778275 | 4474 | |
8bfa79fc TH |
4475 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
4476 | ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); | |
1da177e4 | 4477 | |
6919a0a6 | 4478 | while (ad->model_num) { |
539cc7c7 | 4479 | if (!strn_pattern_cmp(ad->model_num, model_num, '*')) { |
6919a0a6 AC |
4480 | if (ad->model_rev == NULL) |
4481 | return ad->horkage; | |
539cc7c7 | 4482 | if (!strn_pattern_cmp(ad->model_rev, model_rev, '*')) |
6919a0a6 | 4483 | return ad->horkage; |
f4b15fef | 4484 | } |
6919a0a6 | 4485 | ad++; |
f4b15fef | 4486 | } |
1da177e4 LT |
4487 | return 0; |
4488 | } | |
4489 | ||
6919a0a6 AC |
4490 | static int ata_dma_blacklisted(const struct ata_device *dev) |
4491 | { | |
4492 | /* We don't support polling DMA. | |
4493 | * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) | |
4494 | * if the LLDD handles only interrupts in the HSM_ST_LAST state. | |
4495 | */ | |
9af5c9c9 | 4496 | if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && |
6919a0a6 AC |
4497 | (dev->flags & ATA_DFLAG_CDB_INTR)) |
4498 | return 1; | |
75683fe7 | 4499 | return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; |
6919a0a6 AC |
4500 | } |
4501 | ||
6bbfd53d AC |
4502 | /** |
4503 | * ata_is_40wire - check drive side detection | |
4504 | * @dev: device | |
4505 | * | |
4506 | * Perform drive side detection decoding, allowing for device vendors | |
4507 | * who can't follow the documentation. | |
4508 | */ | |
4509 | ||
4510 | static int ata_is_40wire(struct ata_device *dev) | |
4511 | { | |
4512 | if (dev->horkage & ATA_HORKAGE_IVB) | |
4513 | return ata_drive_40wire_relaxed(dev->id); | |
4514 | return ata_drive_40wire(dev->id); | |
4515 | } | |
4516 | ||
a6d5a51c TH |
4517 | /** |
4518 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
a6d5a51c TH |
4519 | * @dev: Device to compute xfermask for |
4520 | * | |
acf356b1 TH |
4521 | * Compute supported xfermask of @dev and store it in |
4522 | * dev->*_mask. This function is responsible for applying all | |
4523 | * known limits including host controller limits, device | |
4524 | * blacklist, etc... | |
a6d5a51c TH |
4525 | * |
4526 | * LOCKING: | |
4527 | * None. | |
a6d5a51c | 4528 | */ |
3373efd8 | 4529 | static void ata_dev_xfermask(struct ata_device *dev) |
1da177e4 | 4530 | { |
9af5c9c9 TH |
4531 | struct ata_link *link = dev->link; |
4532 | struct ata_port *ap = link->ap; | |
cca3974e | 4533 | struct ata_host *host = ap->host; |
a6d5a51c | 4534 | unsigned long xfer_mask; |
1da177e4 | 4535 | |
37deecb5 | 4536 | /* controller modes available */ |
565083e1 TH |
4537 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
4538 | ap->mwdma_mask, ap->udma_mask); | |
4539 | ||
8343f889 | 4540 | /* drive modes available */ |
37deecb5 TH |
4541 | xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
4542 | dev->mwdma_mask, dev->udma_mask); | |
4543 | xfer_mask &= ata_id_xfermask(dev->id); | |
565083e1 | 4544 | |
b352e57d AC |
4545 | /* |
4546 | * CFA Advanced TrueIDE timings are not allowed on a shared | |
4547 | * cable | |
4548 | */ | |
4549 | if (ata_dev_pair(dev)) { | |
4550 | /* No PIO5 or PIO6 */ | |
4551 | xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); | |
4552 | /* No MWDMA3 or MWDMA 4 */ | |
4553 | xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); | |
4554 | } | |
4555 | ||
37deecb5 TH |
4556 | if (ata_dma_blacklisted(dev)) { |
4557 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
f15a1daf TH |
4558 | ata_dev_printk(dev, KERN_WARNING, |
4559 | "device is on DMA blacklist, disabling DMA\n"); | |
37deecb5 | 4560 | } |
a6d5a51c | 4561 | |
14d66ab7 | 4562 | if ((host->flags & ATA_HOST_SIMPLEX) && |
2dcb407e | 4563 | host->simplex_claimed && host->simplex_claimed != ap) { |
37deecb5 TH |
4564 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
4565 | ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " | |
4566 | "other device, disabling DMA\n"); | |
5444a6f4 | 4567 | } |
565083e1 | 4568 | |
e424675f JG |
4569 | if (ap->flags & ATA_FLAG_NO_IORDY) |
4570 | xfer_mask &= ata_pio_mask_no_iordy(dev); | |
4571 | ||
5444a6f4 | 4572 | if (ap->ops->mode_filter) |
a76b62ca | 4573 | xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
5444a6f4 | 4574 | |
8343f889 RH |
4575 | /* Apply cable rule here. Don't apply it early because when |
4576 | * we handle hot plug the cable type can itself change. | |
4577 | * Check this last so that we know if the transfer rate was | |
4578 | * solely limited by the cable. | |
4579 | * Unknown or 80 wire cables reported host side are checked | |
4580 | * drive side as well. Cases where we know a 40wire cable | |
4581 | * is used safely for 80 are not checked here. | |
4582 | */ | |
4583 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) | |
4584 | /* UDMA/44 or higher would be available */ | |
2dcb407e | 4585 | if ((ap->cbl == ATA_CBL_PATA40) || |
6bbfd53d | 4586 | (ata_is_40wire(dev) && |
2dcb407e JG |
4587 | (ap->cbl == ATA_CBL_PATA_UNK || |
4588 | ap->cbl == ATA_CBL_PATA80))) { | |
4589 | ata_dev_printk(dev, KERN_WARNING, | |
8343f889 RH |
4590 | "limited to UDMA/33 due to 40-wire cable\n"); |
4591 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); | |
4592 | } | |
4593 | ||
565083e1 TH |
4594 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
4595 | &dev->mwdma_mask, &dev->udma_mask); | |
1da177e4 LT |
4596 | } |
4597 | ||
1da177e4 LT |
4598 | /** |
4599 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
1da177e4 LT |
4600 | * @dev: Device to which command will be sent |
4601 | * | |
780a87f7 JG |
4602 | * Issue SET FEATURES - XFER MODE command to device @dev |
4603 | * on port @ap. | |
4604 | * | |
1da177e4 | 4605 | * LOCKING: |
0cba632b | 4606 | * PCI/etc. bus probe sem. |
83206a29 TH |
4607 | * |
4608 | * RETURNS: | |
4609 | * 0 on success, AC_ERR_* mask otherwise. | |
1da177e4 LT |
4610 | */ |
4611 | ||
3373efd8 | 4612 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
1da177e4 | 4613 | { |
a0123703 | 4614 | struct ata_taskfile tf; |
83206a29 | 4615 | unsigned int err_mask; |
1da177e4 LT |
4616 | |
4617 | /* set up set-features taskfile */ | |
4618 | DPRINTK("set features - xfer mode\n"); | |
4619 | ||
464cf177 TH |
4620 | /* Some controllers and ATAPI devices show flaky interrupt |
4621 | * behavior after setting xfer mode. Use polling instead. | |
4622 | */ | |
3373efd8 | 4623 | ata_tf_init(dev, &tf); |
a0123703 TH |
4624 | tf.command = ATA_CMD_SET_FEATURES; |
4625 | tf.feature = SETFEATURES_XFER; | |
464cf177 | 4626 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; |
a0123703 | 4627 | tf.protocol = ATA_PROT_NODATA; |
b9f8ab2d | 4628 | /* If we are using IORDY we must send the mode setting command */ |
11b7becc JG |
4629 | if (ata_pio_need_iordy(dev)) |
4630 | tf.nsect = dev->xfer_mode; | |
b9f8ab2d AC |
4631 | /* If the device has IORDY and the controller does not - turn it off */ |
4632 | else if (ata_id_has_iordy(dev->id)) | |
11b7becc | 4633 | tf.nsect = 0x01; |
b9f8ab2d AC |
4634 | else /* In the ancient relic department - skip all of this */ |
4635 | return 0; | |
1da177e4 | 4636 | |
2b789108 | 4637 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
9f45cbd3 KCA |
4638 | |
4639 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
4640 | return err_mask; | |
4641 | } | |
9f45cbd3 | 4642 | /** |
218f3d30 | 4643 | * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES |
9f45cbd3 KCA |
4644 | * @dev: Device to which command will be sent |
4645 | * @enable: Whether to enable or disable the feature | |
218f3d30 | 4646 | * @feature: The sector count represents the feature to set |
9f45cbd3 KCA |
4647 | * |
4648 | * Issue SET FEATURES - SATA FEATURES command to device @dev | |
218f3d30 | 4649 | * on port @ap with sector count |
9f45cbd3 KCA |
4650 | * |
4651 | * LOCKING: | |
4652 | * PCI/etc. bus probe sem. | |
4653 | * | |
4654 | * RETURNS: | |
4655 | * 0 on success, AC_ERR_* mask otherwise. | |
4656 | */ | |
218f3d30 JG |
4657 | static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, |
4658 | u8 feature) | |
9f45cbd3 KCA |
4659 | { |
4660 | struct ata_taskfile tf; | |
4661 | unsigned int err_mask; | |
4662 | ||
4663 | /* set up set-features taskfile */ | |
4664 | DPRINTK("set features - SATA features\n"); | |
4665 | ||
4666 | ata_tf_init(dev, &tf); | |
4667 | tf.command = ATA_CMD_SET_FEATURES; | |
4668 | tf.feature = enable; | |
4669 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4670 | tf.protocol = ATA_PROT_NODATA; | |
218f3d30 | 4671 | tf.nsect = feature; |
9f45cbd3 | 4672 | |
2b789108 | 4673 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
1da177e4 | 4674 | |
83206a29 TH |
4675 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4676 | return err_mask; | |
1da177e4 LT |
4677 | } |
4678 | ||
8bf62ece AL |
4679 | /** |
4680 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
8bf62ece | 4681 | * @dev: Device to which command will be sent |
e2a7f77a RD |
4682 | * @heads: Number of heads (taskfile parameter) |
4683 | * @sectors: Number of sectors (taskfile parameter) | |
8bf62ece AL |
4684 | * |
4685 | * LOCKING: | |
6aff8f1f TH |
4686 | * Kernel thread context (may sleep) |
4687 | * | |
4688 | * RETURNS: | |
4689 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece | 4690 | */ |
3373efd8 TH |
4691 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
4692 | u16 heads, u16 sectors) | |
8bf62ece | 4693 | { |
a0123703 | 4694 | struct ata_taskfile tf; |
6aff8f1f | 4695 | unsigned int err_mask; |
8bf62ece AL |
4696 | |
4697 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
4698 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
00b6f5e9 | 4699 | return AC_ERR_INVALID; |
8bf62ece AL |
4700 | |
4701 | /* set up init dev params taskfile */ | |
4702 | DPRINTK("init dev params \n"); | |
4703 | ||
3373efd8 | 4704 | ata_tf_init(dev, &tf); |
a0123703 TH |
4705 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
4706 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4707 | tf.protocol = ATA_PROT_NODATA; | |
4708 | tf.nsect = sectors; | |
4709 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 4710 | |
2b789108 | 4711 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
18b2466c AC |
4712 | /* A clean abort indicates an original or just out of spec drive |
4713 | and we should continue as we issue the setup based on the | |
4714 | drive reported working geometry */ | |
4715 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
4716 | err_mask = 0; | |
8bf62ece | 4717 | |
6aff8f1f TH |
4718 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4719 | return err_mask; | |
8bf62ece AL |
4720 | } |
4721 | ||
1da177e4 | 4722 | /** |
0cba632b JG |
4723 | * ata_sg_clean - Unmap DMA memory associated with command |
4724 | * @qc: Command containing DMA memory to be released | |
4725 | * | |
4726 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
4727 | * |
4728 | * LOCKING: | |
cca3974e | 4729 | * spin_lock_irqsave(host lock) |
1da177e4 | 4730 | */ |
70e6ad0c | 4731 | void ata_sg_clean(struct ata_queued_cmd *qc) |
1da177e4 LT |
4732 | { |
4733 | struct ata_port *ap = qc->ap; | |
ff2aeb1e | 4734 | struct scatterlist *sg = qc->sg; |
1da177e4 LT |
4735 | int dir = qc->dma_dir; |
4736 | ||
a4631474 | 4737 | WARN_ON(sg == NULL); |
1da177e4 | 4738 | |
dde20207 | 4739 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 4740 | |
dde20207 JB |
4741 | if (qc->n_elem) |
4742 | dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); | |
1da177e4 LT |
4743 | |
4744 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
ff2aeb1e | 4745 | qc->sg = NULL; |
1da177e4 LT |
4746 | } |
4747 | ||
4748 | /** | |
4749 | * ata_fill_sg - Fill PCI IDE PRD table | |
4750 | * @qc: Metadata associated with taskfile to be transferred | |
4751 | * | |
780a87f7 JG |
4752 | * Fill PCI IDE PRD (scatter-gather) table with segments |
4753 | * associated with the current disk command. | |
4754 | * | |
1da177e4 | 4755 | * LOCKING: |
cca3974e | 4756 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4757 | * |
4758 | */ | |
4759 | static void ata_fill_sg(struct ata_queued_cmd *qc) | |
4760 | { | |
1da177e4 | 4761 | struct ata_port *ap = qc->ap; |
cedc9a47 | 4762 | struct scatterlist *sg; |
ff2aeb1e | 4763 | unsigned int si, pi; |
1da177e4 | 4764 | |
ff2aeb1e TH |
4765 | pi = 0; |
4766 | for_each_sg(qc->sg, sg, qc->n_elem, si) { | |
1da177e4 LT |
4767 | u32 addr, offset; |
4768 | u32 sg_len, len; | |
4769 | ||
4770 | /* determine if physical DMA addr spans 64K boundary. | |
4771 | * Note h/w doesn't support 64-bit, so we unconditionally | |
4772 | * truncate dma_addr_t to u32. | |
4773 | */ | |
4774 | addr = (u32) sg_dma_address(sg); | |
4775 | sg_len = sg_dma_len(sg); | |
4776 | ||
4777 | while (sg_len) { | |
4778 | offset = addr & 0xffff; | |
4779 | len = sg_len; | |
4780 | if ((offset + sg_len) > 0x10000) | |
4781 | len = 0x10000 - offset; | |
4782 | ||
ff2aeb1e TH |
4783 | ap->prd[pi].addr = cpu_to_le32(addr); |
4784 | ap->prd[pi].flags_len = cpu_to_le32(len & 0xffff); | |
4785 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len); | |
1da177e4 | 4786 | |
ff2aeb1e | 4787 | pi++; |
1da177e4 LT |
4788 | sg_len -= len; |
4789 | addr += len; | |
4790 | } | |
4791 | } | |
4792 | ||
ff2aeb1e | 4793 | ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); |
1da177e4 | 4794 | } |
b9a4197e | 4795 | |
d26fc955 AC |
4796 | /** |
4797 | * ata_fill_sg_dumb - Fill PCI IDE PRD table | |
4798 | * @qc: Metadata associated with taskfile to be transferred | |
4799 | * | |
4800 | * Fill PCI IDE PRD (scatter-gather) table with segments | |
4801 | * associated with the current disk command. Perform the fill | |
4802 | * so that we avoid writing any length 64K records for | |
4803 | * controllers that don't follow the spec. | |
4804 | * | |
4805 | * LOCKING: | |
4806 | * spin_lock_irqsave(host lock) | |
4807 | * | |
4808 | */ | |
4809 | static void ata_fill_sg_dumb(struct ata_queued_cmd *qc) | |
4810 | { | |
4811 | struct ata_port *ap = qc->ap; | |
4812 | struct scatterlist *sg; | |
ff2aeb1e | 4813 | unsigned int si, pi; |
d26fc955 | 4814 | |
ff2aeb1e TH |
4815 | pi = 0; |
4816 | for_each_sg(qc->sg, sg, qc->n_elem, si) { | |
d26fc955 AC |
4817 | u32 addr, offset; |
4818 | u32 sg_len, len, blen; | |
4819 | ||
2dcb407e | 4820 | /* determine if physical DMA addr spans 64K boundary. |
d26fc955 AC |
4821 | * Note h/w doesn't support 64-bit, so we unconditionally |
4822 | * truncate dma_addr_t to u32. | |
4823 | */ | |
4824 | addr = (u32) sg_dma_address(sg); | |
4825 | sg_len = sg_dma_len(sg); | |
4826 | ||
4827 | while (sg_len) { | |
4828 | offset = addr & 0xffff; | |
4829 | len = sg_len; | |
4830 | if ((offset + sg_len) > 0x10000) | |
4831 | len = 0x10000 - offset; | |
4832 | ||
4833 | blen = len & 0xffff; | |
ff2aeb1e | 4834 | ap->prd[pi].addr = cpu_to_le32(addr); |
d26fc955 AC |
4835 | if (blen == 0) { |
4836 | /* Some PATA chipsets like the CS5530 can't | |
4837 | cope with 0x0000 meaning 64K as the spec says */ | |
ff2aeb1e | 4838 | ap->prd[pi].flags_len = cpu_to_le32(0x8000); |
d26fc955 | 4839 | blen = 0x8000; |
ff2aeb1e | 4840 | ap->prd[++pi].addr = cpu_to_le32(addr + 0x8000); |
d26fc955 | 4841 | } |
ff2aeb1e TH |
4842 | ap->prd[pi].flags_len = cpu_to_le32(blen); |
4843 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len); | |
d26fc955 | 4844 | |
ff2aeb1e | 4845 | pi++; |
d26fc955 AC |
4846 | sg_len -= len; |
4847 | addr += len; | |
4848 | } | |
4849 | } | |
4850 | ||
ff2aeb1e | 4851 | ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); |
d26fc955 AC |
4852 | } |
4853 | ||
1da177e4 LT |
4854 | /** |
4855 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported | |
4856 | * @qc: Metadata associated with taskfile to check | |
4857 | * | |
780a87f7 JG |
4858 | * Allow low-level driver to filter ATA PACKET commands, returning |
4859 | * a status indicating whether or not it is OK to use DMA for the | |
4860 | * supplied PACKET command. | |
4861 | * | |
1da177e4 | 4862 | * LOCKING: |
cca3974e | 4863 | * spin_lock_irqsave(host lock) |
0cba632b | 4864 | * |
1da177e4 LT |
4865 | * RETURNS: 0 when ATAPI DMA can be used |
4866 | * nonzero otherwise | |
4867 | */ | |
4868 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) | |
4869 | { | |
4870 | struct ata_port *ap = qc->ap; | |
b9a4197e TH |
4871 | |
4872 | /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a | |
4873 | * few ATAPI devices choke on such DMA requests. | |
4874 | */ | |
4875 | if (unlikely(qc->nbytes & 15)) | |
4876 | return 1; | |
6f23a31d | 4877 | |
1da177e4 | 4878 | if (ap->ops->check_atapi_dma) |
b9a4197e | 4879 | return ap->ops->check_atapi_dma(qc); |
1da177e4 | 4880 | |
b9a4197e | 4881 | return 0; |
1da177e4 | 4882 | } |
b9a4197e | 4883 | |
31cc23b3 TH |
4884 | /** |
4885 | * ata_std_qc_defer - Check whether a qc needs to be deferred | |
4886 | * @qc: ATA command in question | |
4887 | * | |
4888 | * Non-NCQ commands cannot run with any other command, NCQ or | |
4889 | * not. As upper layer only knows the queue depth, we are | |
4890 | * responsible for maintaining exclusion. This function checks | |
4891 | * whether a new command @qc can be issued. | |
4892 | * | |
4893 | * LOCKING: | |
4894 | * spin_lock_irqsave(host lock) | |
4895 | * | |
4896 | * RETURNS: | |
4897 | * ATA_DEFER_* if deferring is needed, 0 otherwise. | |
4898 | */ | |
4899 | int ata_std_qc_defer(struct ata_queued_cmd *qc) | |
4900 | { | |
4901 | struct ata_link *link = qc->dev->link; | |
4902 | ||
4903 | if (qc->tf.protocol == ATA_PROT_NCQ) { | |
4904 | if (!ata_tag_valid(link->active_tag)) | |
4905 | return 0; | |
4906 | } else { | |
4907 | if (!ata_tag_valid(link->active_tag) && !link->sactive) | |
4908 | return 0; | |
4909 | } | |
4910 | ||
4911 | return ATA_DEFER_LINK; | |
4912 | } | |
4913 | ||
1da177e4 LT |
4914 | /** |
4915 | * ata_qc_prep - Prepare taskfile for submission | |
4916 | * @qc: Metadata associated with taskfile to be prepared | |
4917 | * | |
780a87f7 JG |
4918 | * Prepare ATA taskfile for submission. |
4919 | * | |
1da177e4 | 4920 | * LOCKING: |
cca3974e | 4921 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4922 | */ |
4923 | void ata_qc_prep(struct ata_queued_cmd *qc) | |
4924 | { | |
4925 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4926 | return; | |
4927 | ||
4928 | ata_fill_sg(qc); | |
4929 | } | |
4930 | ||
d26fc955 AC |
4931 | /** |
4932 | * ata_dumb_qc_prep - Prepare taskfile for submission | |
4933 | * @qc: Metadata associated with taskfile to be prepared | |
4934 | * | |
4935 | * Prepare ATA taskfile for submission. | |
4936 | * | |
4937 | * LOCKING: | |
4938 | * spin_lock_irqsave(host lock) | |
4939 | */ | |
4940 | void ata_dumb_qc_prep(struct ata_queued_cmd *qc) | |
4941 | { | |
4942 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4943 | return; | |
4944 | ||
4945 | ata_fill_sg_dumb(qc); | |
4946 | } | |
4947 | ||
e46834cd BK |
4948 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
4949 | ||
0cba632b JG |
4950 | /** |
4951 | * ata_sg_init - Associate command with scatter-gather table. | |
4952 | * @qc: Command to be associated | |
4953 | * @sg: Scatter-gather table. | |
4954 | * @n_elem: Number of elements in s/g table. | |
4955 | * | |
4956 | * Initialize the data-related elements of queued_cmd @qc | |
4957 | * to point to a scatter-gather table @sg, containing @n_elem | |
4958 | * elements. | |
4959 | * | |
4960 | * LOCKING: | |
cca3974e | 4961 | * spin_lock_irqsave(host lock) |
0cba632b | 4962 | */ |
1da177e4 LT |
4963 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
4964 | unsigned int n_elem) | |
4965 | { | |
ff2aeb1e | 4966 | qc->sg = sg; |
1da177e4 | 4967 | qc->n_elem = n_elem; |
ff2aeb1e | 4968 | qc->cursg = qc->sg; |
1da177e4 LT |
4969 | } |
4970 | ||
ff2aeb1e TH |
4971 | /** |
4972 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. | |
4973 | * @qc: Command with scatter-gather table to be mapped. | |
4974 | * | |
4975 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
4976 | * | |
4977 | * LOCKING: | |
4978 | * spin_lock_irqsave(host lock) | |
4979 | * | |
4980 | * RETURNS: | |
4981 | * Zero on success, negative on error. | |
4982 | * | |
4983 | */ | |
4984 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
4985 | { | |
4986 | struct ata_port *ap = qc->ap; | |
dde20207 | 4987 | unsigned int n_elem; |
ff2aeb1e TH |
4988 | |
4989 | VPRINTK("ENTER, ata%u\n", ap->print_id); | |
4990 | ||
dde20207 JB |
4991 | n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); |
4992 | if (n_elem < 1) | |
4993 | return -1; | |
ff2aeb1e | 4994 | |
dde20207 | 4995 | DPRINTK("%d sg elements mapped\n", n_elem); |
1da177e4 | 4996 | |
dde20207 | 4997 | qc->n_elem = n_elem; |
f92a2636 | 4998 | qc->flags |= ATA_QCFLAG_DMAMAP; |
1da177e4 LT |
4999 | |
5000 | return 0; | |
5001 | } | |
5002 | ||
0baab86b | 5003 | /** |
c893a3ae | 5004 | * swap_buf_le16 - swap halves of 16-bit words in place |
0baab86b EF |
5005 | * @buf: Buffer to swap |
5006 | * @buf_words: Number of 16-bit words in buffer. | |
5007 | * | |
5008 | * Swap halves of 16-bit words if needed to convert from | |
5009 | * little-endian byte order to native cpu byte order, or | |
5010 | * vice-versa. | |
5011 | * | |
5012 | * LOCKING: | |
6f0ef4fa | 5013 | * Inherited from caller. |
0baab86b | 5014 | */ |
1da177e4 LT |
5015 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
5016 | { | |
5017 | #ifdef __BIG_ENDIAN | |
5018 | unsigned int i; | |
5019 | ||
5020 | for (i = 0; i < buf_words; i++) | |
5021 | buf[i] = le16_to_cpu(buf[i]); | |
5022 | #endif /* __BIG_ENDIAN */ | |
5023 | } | |
5024 | ||
6ae4cfb5 | 5025 | /** |
0d5ff566 | 5026 | * ata_data_xfer - Transfer data by PIO |
55dba312 | 5027 | * @dev: device to target |
6ae4cfb5 AL |
5028 | * @buf: data buffer |
5029 | * @buflen: buffer length | |
0affa456 | 5030 | * @rw: read/write |
6ae4cfb5 AL |
5031 | * |
5032 | * Transfer data from/to the device data register by PIO. | |
5033 | * | |
5034 | * LOCKING: | |
5035 | * Inherited from caller. | |
55dba312 TH |
5036 | * |
5037 | * RETURNS: | |
5038 | * Bytes consumed. | |
6ae4cfb5 | 5039 | */ |
55dba312 TH |
5040 | unsigned int ata_data_xfer(struct ata_device *dev, unsigned char *buf, |
5041 | unsigned int buflen, int rw) | |
1da177e4 | 5042 | { |
55dba312 TH |
5043 | struct ata_port *ap = dev->link->ap; |
5044 | void __iomem *data_addr = ap->ioaddr.data_addr; | |
6ae4cfb5 | 5045 | unsigned int words = buflen >> 1; |
1da177e4 | 5046 | |
6ae4cfb5 | 5047 | /* Transfer multiple of 2 bytes */ |
55dba312 TH |
5048 | if (rw == READ) |
5049 | ioread16_rep(data_addr, buf, words); | |
1da177e4 | 5050 | else |
55dba312 | 5051 | iowrite16_rep(data_addr, buf, words); |
6ae4cfb5 AL |
5052 | |
5053 | /* Transfer trailing 1 byte, if any. */ | |
5054 | if (unlikely(buflen & 0x01)) { | |
4ca4e439 | 5055 | __le16 align_buf[1] = { 0 }; |
6ae4cfb5 AL |
5056 | unsigned char *trailing_buf = buf + buflen - 1; |
5057 | ||
55dba312 TH |
5058 | if (rw == READ) { |
5059 | align_buf[0] = cpu_to_le16(ioread16(data_addr)); | |
6ae4cfb5 | 5060 | memcpy(trailing_buf, align_buf, 1); |
55dba312 TH |
5061 | } else { |
5062 | memcpy(align_buf, trailing_buf, 1); | |
5063 | iowrite16(le16_to_cpu(align_buf[0]), data_addr); | |
6ae4cfb5 | 5064 | } |
55dba312 | 5065 | words++; |
6ae4cfb5 | 5066 | } |
55dba312 TH |
5067 | |
5068 | return words << 1; | |
1da177e4 LT |
5069 | } |
5070 | ||
75e99585 | 5071 | /** |
0d5ff566 | 5072 | * ata_data_xfer_noirq - Transfer data by PIO |
55dba312 | 5073 | * @dev: device to target |
75e99585 AC |
5074 | * @buf: data buffer |
5075 | * @buflen: buffer length | |
0affa456 | 5076 | * @rw: read/write |
75e99585 | 5077 | * |
88574551 | 5078 | * Transfer data from/to the device data register by PIO. Do the |
75e99585 AC |
5079 | * transfer with interrupts disabled. |
5080 | * | |
5081 | * LOCKING: | |
5082 | * Inherited from caller. | |
55dba312 TH |
5083 | * |
5084 | * RETURNS: | |
5085 | * Bytes consumed. | |
75e99585 | 5086 | */ |
55dba312 TH |
5087 | unsigned int ata_data_xfer_noirq(struct ata_device *dev, unsigned char *buf, |
5088 | unsigned int buflen, int rw) | |
75e99585 AC |
5089 | { |
5090 | unsigned long flags; | |
55dba312 TH |
5091 | unsigned int consumed; |
5092 | ||
75e99585 | 5093 | local_irq_save(flags); |
55dba312 | 5094 | consumed = ata_data_xfer(dev, buf, buflen, rw); |
75e99585 | 5095 | local_irq_restore(flags); |
55dba312 TH |
5096 | |
5097 | return consumed; | |
75e99585 AC |
5098 | } |
5099 | ||
5100 | ||
6ae4cfb5 | 5101 | /** |
5a5dbd18 | 5102 | * ata_pio_sector - Transfer a sector of data. |
6ae4cfb5 AL |
5103 | * @qc: Command on going |
5104 | * | |
5a5dbd18 | 5105 | * Transfer qc->sect_size bytes of data from/to the ATA device. |
6ae4cfb5 AL |
5106 | * |
5107 | * LOCKING: | |
5108 | * Inherited from caller. | |
5109 | */ | |
5110 | ||
1da177e4 LT |
5111 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
5112 | { | |
5113 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
1da177e4 LT |
5114 | struct ata_port *ap = qc->ap; |
5115 | struct page *page; | |
5116 | unsigned int offset; | |
5117 | unsigned char *buf; | |
5118 | ||
5a5dbd18 | 5119 | if (qc->curbytes == qc->nbytes - qc->sect_size) |
14be71f4 | 5120 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 | 5121 | |
45711f1a | 5122 | page = sg_page(qc->cursg); |
87260216 | 5123 | offset = qc->cursg->offset + qc->cursg_ofs; |
1da177e4 LT |
5124 | |
5125 | /* get the current page and offset */ | |
5126 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
5127 | offset %= PAGE_SIZE; | |
5128 | ||
1da177e4 LT |
5129 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
5130 | ||
91b8b313 AL |
5131 | if (PageHighMem(page)) { |
5132 | unsigned long flags; | |
5133 | ||
a6b2c5d4 | 5134 | /* FIXME: use a bounce buffer */ |
91b8b313 AL |
5135 | local_irq_save(flags); |
5136 | buf = kmap_atomic(page, KM_IRQ0); | |
083958d3 | 5137 | |
91b8b313 | 5138 | /* do the actual data transfer */ |
5a5dbd18 | 5139 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); |
1da177e4 | 5140 | |
91b8b313 AL |
5141 | kunmap_atomic(buf, KM_IRQ0); |
5142 | local_irq_restore(flags); | |
5143 | } else { | |
5144 | buf = page_address(page); | |
5a5dbd18 | 5145 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); |
91b8b313 | 5146 | } |
1da177e4 | 5147 | |
5a5dbd18 ML |
5148 | qc->curbytes += qc->sect_size; |
5149 | qc->cursg_ofs += qc->sect_size; | |
1da177e4 | 5150 | |
87260216 JA |
5151 | if (qc->cursg_ofs == qc->cursg->length) { |
5152 | qc->cursg = sg_next(qc->cursg); | |
1da177e4 LT |
5153 | qc->cursg_ofs = 0; |
5154 | } | |
1da177e4 | 5155 | } |
1da177e4 | 5156 | |
07f6f7d0 | 5157 | /** |
5a5dbd18 | 5158 | * ata_pio_sectors - Transfer one or many sectors. |
07f6f7d0 AL |
5159 | * @qc: Command on going |
5160 | * | |
5a5dbd18 | 5161 | * Transfer one or many sectors of data from/to the |
07f6f7d0 AL |
5162 | * ATA device for the DRQ request. |
5163 | * | |
5164 | * LOCKING: | |
5165 | * Inherited from caller. | |
5166 | */ | |
1da177e4 | 5167 | |
07f6f7d0 AL |
5168 | static void ata_pio_sectors(struct ata_queued_cmd *qc) |
5169 | { | |
5170 | if (is_multi_taskfile(&qc->tf)) { | |
5171 | /* READ/WRITE MULTIPLE */ | |
5172 | unsigned int nsect; | |
5173 | ||
587005de | 5174 | WARN_ON(qc->dev->multi_count == 0); |
1da177e4 | 5175 | |
5a5dbd18 | 5176 | nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, |
726f0785 | 5177 | qc->dev->multi_count); |
07f6f7d0 AL |
5178 | while (nsect--) |
5179 | ata_pio_sector(qc); | |
5180 | } else | |
5181 | ata_pio_sector(qc); | |
4cc980b3 AL |
5182 | |
5183 | ata_altstatus(qc->ap); /* flush */ | |
07f6f7d0 AL |
5184 | } |
5185 | ||
c71c1857 AL |
5186 | /** |
5187 | * atapi_send_cdb - Write CDB bytes to hardware | |
5188 | * @ap: Port to which ATAPI device is attached. | |
5189 | * @qc: Taskfile currently active | |
5190 | * | |
5191 | * When device has indicated its readiness to accept | |
5192 | * a CDB, this function is called. Send the CDB. | |
5193 | * | |
5194 | * LOCKING: | |
5195 | * caller. | |
5196 | */ | |
5197 | ||
5198 | static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) | |
5199 | { | |
5200 | /* send SCSI cdb */ | |
5201 | DPRINTK("send cdb\n"); | |
db024d53 | 5202 | WARN_ON(qc->dev->cdb_len < 12); |
c71c1857 | 5203 | |
a6b2c5d4 | 5204 | ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); |
c71c1857 AL |
5205 | ata_altstatus(ap); /* flush */ |
5206 | ||
5207 | switch (qc->tf.protocol) { | |
0dc36888 | 5208 | case ATAPI_PROT_PIO: |
c71c1857 AL |
5209 | ap->hsm_task_state = HSM_ST; |
5210 | break; | |
0dc36888 | 5211 | case ATAPI_PROT_NODATA: |
c71c1857 AL |
5212 | ap->hsm_task_state = HSM_ST_LAST; |
5213 | break; | |
0dc36888 | 5214 | case ATAPI_PROT_DMA: |
c71c1857 AL |
5215 | ap->hsm_task_state = HSM_ST_LAST; |
5216 | /* initiate bmdma */ | |
5217 | ap->ops->bmdma_start(qc); | |
5218 | break; | |
5219 | } | |
1da177e4 LT |
5220 | } |
5221 | ||
6ae4cfb5 AL |
5222 | /** |
5223 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
5224 | * @qc: Command on going | |
5225 | * @bytes: number of bytes | |
5226 | * | |
5227 | * Transfer Transfer data from/to the ATAPI device. | |
5228 | * | |
5229 | * LOCKING: | |
5230 | * Inherited from caller. | |
5231 | * | |
5232 | */ | |
140b5e59 | 5233 | static int __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
1da177e4 | 5234 | { |
56c819df | 5235 | int rw = (qc->tf.flags & ATA_TFLAG_WRITE) ? WRITE : READ; |
1da177e4 | 5236 | struct ata_port *ap = qc->ap; |
56c819df TH |
5237 | struct ata_device *dev = qc->dev; |
5238 | struct ata_eh_info *ehi = &dev->link->eh_info; | |
140b5e59 | 5239 | struct scatterlist *sg; |
1da177e4 LT |
5240 | struct page *page; |
5241 | unsigned char *buf; | |
56c819df | 5242 | unsigned int offset, count, consumed; |
1da177e4 LT |
5243 | |
5244 | next_sg: | |
140b5e59 TH |
5245 | sg = qc->cursg; |
5246 | if (unlikely(!sg)) { | |
fa2fc7f4 JB |
5247 | ata_ehi_push_desc(ehi, "unexpected or too much trailing data " |
5248 | "buf=%u cur=%u bytes=%u", | |
5249 | qc->nbytes, qc->curbytes, bytes); | |
5250 | return -1; | |
140b5e59 | 5251 | } |
1da177e4 | 5252 | |
45711f1a | 5253 | page = sg_page(sg); |
1da177e4 LT |
5254 | offset = sg->offset + qc->cursg_ofs; |
5255 | ||
5256 | /* get the current page and offset */ | |
5257 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
5258 | offset %= PAGE_SIZE; | |
5259 | ||
6952df03 | 5260 | /* don't overrun current sg */ |
32529e01 | 5261 | count = min(sg->length - qc->cursg_ofs, bytes); |
1da177e4 LT |
5262 | |
5263 | /* don't cross page boundaries */ | |
5264 | count = min(count, (unsigned int)PAGE_SIZE - offset); | |
5265 | ||
7282aa4b AL |
5266 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
5267 | ||
91b8b313 AL |
5268 | if (PageHighMem(page)) { |
5269 | unsigned long flags; | |
5270 | ||
a6b2c5d4 | 5271 | /* FIXME: use bounce buffer */ |
91b8b313 AL |
5272 | local_irq_save(flags); |
5273 | buf = kmap_atomic(page, KM_IRQ0); | |
083958d3 | 5274 | |
91b8b313 | 5275 | /* do the actual data transfer */ |
56c819df | 5276 | consumed = ap->ops->data_xfer(dev, buf + offset, count, rw); |
7282aa4b | 5277 | |
91b8b313 AL |
5278 | kunmap_atomic(buf, KM_IRQ0); |
5279 | local_irq_restore(flags); | |
5280 | } else { | |
5281 | buf = page_address(page); | |
56c819df | 5282 | consumed = ap->ops->data_xfer(dev, buf + offset, count, rw); |
91b8b313 | 5283 | } |
1da177e4 | 5284 | |
56c819df | 5285 | bytes -= min(bytes, consumed); |
1da177e4 LT |
5286 | qc->curbytes += count; |
5287 | qc->cursg_ofs += count; | |
5288 | ||
32529e01 | 5289 | if (qc->cursg_ofs == sg->length) { |
87260216 | 5290 | qc->cursg = sg_next(qc->cursg); |
1da177e4 LT |
5291 | qc->cursg_ofs = 0; |
5292 | } | |
5293 | ||
56c819df TH |
5294 | /* consumed can be larger than count only for the last transfer */ |
5295 | WARN_ON(qc->cursg && count != consumed); | |
5296 | ||
563a6e1f | 5297 | if (bytes) |
1da177e4 | 5298 | goto next_sg; |
140b5e59 | 5299 | return 0; |
1da177e4 LT |
5300 | } |
5301 | ||
6ae4cfb5 AL |
5302 | /** |
5303 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
5304 | * @qc: Command on going | |
5305 | * | |
5306 | * Transfer Transfer data from/to the ATAPI device. | |
5307 | * | |
5308 | * LOCKING: | |
5309 | * Inherited from caller. | |
6ae4cfb5 AL |
5310 | */ |
5311 | ||
1da177e4 LT |
5312 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
5313 | { | |
5314 | struct ata_port *ap = qc->ap; | |
5315 | struct ata_device *dev = qc->dev; | |
56c819df | 5316 | struct ata_eh_info *ehi = &dev->link->eh_info; |
1da177e4 LT |
5317 | unsigned int ireason, bc_lo, bc_hi, bytes; |
5318 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
5319 | ||
eec4c3f3 AL |
5320 | /* Abuse qc->result_tf for temp storage of intermediate TF |
5321 | * here to save some kernel stack usage. | |
5322 | * For normal completion, qc->result_tf is not relevant. For | |
5323 | * error, qc->result_tf is later overwritten by ata_qc_complete(). | |
5324 | * So, the correctness of qc->result_tf is not affected. | |
5325 | */ | |
5326 | ap->ops->tf_read(ap, &qc->result_tf); | |
5327 | ireason = qc->result_tf.nsect; | |
5328 | bc_lo = qc->result_tf.lbam; | |
5329 | bc_hi = qc->result_tf.lbah; | |
1da177e4 LT |
5330 | bytes = (bc_hi << 8) | bc_lo; |
5331 | ||
5332 | /* shall be cleared to zero, indicating xfer of data */ | |
0106372d | 5333 | if (unlikely(ireason & (1 << 0))) |
56c819df | 5334 | goto atapi_check; |
1da177e4 LT |
5335 | |
5336 | /* make sure transfer direction matches expected */ | |
5337 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; | |
0106372d | 5338 | if (unlikely(do_write != i_write)) |
56c819df | 5339 | goto atapi_check; |
0106372d AL |
5340 | |
5341 | if (unlikely(!bytes)) | |
56c819df | 5342 | goto atapi_check; |
1da177e4 | 5343 | |
44877b4e | 5344 | VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); |
312f7da2 | 5345 | |
56c819df | 5346 | if (unlikely(__atapi_pio_bytes(qc, bytes))) |
140b5e59 | 5347 | goto err_out; |
4cc980b3 | 5348 | ata_altstatus(ap); /* flush */ |
1da177e4 LT |
5349 | |
5350 | return; | |
5351 | ||
56c819df TH |
5352 | atapi_check: |
5353 | ata_ehi_push_desc(ehi, "ATAPI check failed (ireason=0x%x bytes=%u)", | |
5354 | ireason, bytes); | |
5355 | err_out: | |
11a56d24 | 5356 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 5357 | ap->hsm_task_state = HSM_ST_ERR; |
1da177e4 LT |
5358 | } |
5359 | ||
5360 | /** | |
c234fb00 AL |
5361 | * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. |
5362 | * @ap: the target ata_port | |
5363 | * @qc: qc on going | |
1da177e4 | 5364 | * |
c234fb00 AL |
5365 | * RETURNS: |
5366 | * 1 if ok in workqueue, 0 otherwise. | |
1da177e4 | 5367 | */ |
c234fb00 AL |
5368 | |
5369 | static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) | |
1da177e4 | 5370 | { |
c234fb00 AL |
5371 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
5372 | return 1; | |
1da177e4 | 5373 | |
c234fb00 AL |
5374 | if (ap->hsm_task_state == HSM_ST_FIRST) { |
5375 | if (qc->tf.protocol == ATA_PROT_PIO && | |
5376 | (qc->tf.flags & ATA_TFLAG_WRITE)) | |
5377 | return 1; | |
1da177e4 | 5378 | |
405e66b3 | 5379 | if (ata_is_atapi(qc->tf.protocol) && |
c234fb00 AL |
5380 | !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
5381 | return 1; | |
fe79e683 AL |
5382 | } |
5383 | ||
c234fb00 AL |
5384 | return 0; |
5385 | } | |
1da177e4 | 5386 | |
c17ea20d TH |
5387 | /** |
5388 | * ata_hsm_qc_complete - finish a qc running on standard HSM | |
5389 | * @qc: Command to complete | |
5390 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
5391 | * | |
5392 | * Finish @qc which is running on standard HSM. | |
5393 | * | |
5394 | * LOCKING: | |
cca3974e | 5395 | * If @in_wq is zero, spin_lock_irqsave(host lock). |
c17ea20d TH |
5396 | * Otherwise, none on entry and grabs host lock. |
5397 | */ | |
5398 | static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) | |
5399 | { | |
5400 | struct ata_port *ap = qc->ap; | |
5401 | unsigned long flags; | |
5402 | ||
5403 | if (ap->ops->error_handler) { | |
5404 | if (in_wq) { | |
ba6a1308 | 5405 | spin_lock_irqsave(ap->lock, flags); |
c17ea20d | 5406 | |
cca3974e JG |
5407 | /* EH might have kicked in while host lock is |
5408 | * released. | |
c17ea20d TH |
5409 | */ |
5410 | qc = ata_qc_from_tag(ap, qc->tag); | |
5411 | if (qc) { | |
5412 | if (likely(!(qc->err_mask & AC_ERR_HSM))) { | |
83625006 | 5413 | ap->ops->irq_on(ap); |
c17ea20d TH |
5414 | ata_qc_complete(qc); |
5415 | } else | |
5416 | ata_port_freeze(ap); | |
5417 | } | |
5418 | ||
ba6a1308 | 5419 | spin_unlock_irqrestore(ap->lock, flags); |
c17ea20d TH |
5420 | } else { |
5421 | if (likely(!(qc->err_mask & AC_ERR_HSM))) | |
5422 | ata_qc_complete(qc); | |
5423 | else | |
5424 | ata_port_freeze(ap); | |
5425 | } | |
5426 | } else { | |
5427 | if (in_wq) { | |
ba6a1308 | 5428 | spin_lock_irqsave(ap->lock, flags); |
83625006 | 5429 | ap->ops->irq_on(ap); |
c17ea20d | 5430 | ata_qc_complete(qc); |
ba6a1308 | 5431 | spin_unlock_irqrestore(ap->lock, flags); |
c17ea20d TH |
5432 | } else |
5433 | ata_qc_complete(qc); | |
5434 | } | |
5435 | } | |
5436 | ||
bb5cb290 AL |
5437 | /** |
5438 | * ata_hsm_move - move the HSM to the next state. | |
5439 | * @ap: the target ata_port | |
5440 | * @qc: qc on going | |
5441 | * @status: current device status | |
5442 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
5443 | * | |
5444 | * RETURNS: | |
5445 | * 1 when poll next status needed, 0 otherwise. | |
5446 | */ | |
9a1004d0 TH |
5447 | int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, |
5448 | u8 status, int in_wq) | |
e2cec771 | 5449 | { |
bb5cb290 AL |
5450 | unsigned long flags = 0; |
5451 | int poll_next; | |
5452 | ||
6912ccd5 AL |
5453 | WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); |
5454 | ||
bb5cb290 AL |
5455 | /* Make sure ata_qc_issue_prot() does not throw things |
5456 | * like DMA polling into the workqueue. Notice that | |
5457 | * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). | |
5458 | */ | |
c234fb00 | 5459 | WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); |
bb5cb290 | 5460 | |
e2cec771 | 5461 | fsm_start: |
999bb6f4 | 5462 | DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", |
44877b4e | 5463 | ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); |
999bb6f4 | 5464 | |
e2cec771 AL |
5465 | switch (ap->hsm_task_state) { |
5466 | case HSM_ST_FIRST: | |
bb5cb290 AL |
5467 | /* Send first data block or PACKET CDB */ |
5468 | ||
5469 | /* If polling, we will stay in the work queue after | |
5470 | * sending the data. Otherwise, interrupt handler | |
5471 | * takes over after sending the data. | |
5472 | */ | |
5473 | poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); | |
5474 | ||
e2cec771 | 5475 | /* check device status */ |
3655d1d3 AL |
5476 | if (unlikely((status & ATA_DRQ) == 0)) { |
5477 | /* handle BSY=0, DRQ=0 as error */ | |
5478 | if (likely(status & (ATA_ERR | ATA_DF))) | |
5479 | /* device stops HSM for abort/error */ | |
5480 | qc->err_mask |= AC_ERR_DEV; | |
5481 | else | |
5482 | /* HSM violation. Let EH handle this */ | |
5483 | qc->err_mask |= AC_ERR_HSM; | |
5484 | ||
14be71f4 | 5485 | ap->hsm_task_state = HSM_ST_ERR; |
e2cec771 | 5486 | goto fsm_start; |
1da177e4 LT |
5487 | } |
5488 | ||
71601958 AL |
5489 | /* Device should not ask for data transfer (DRQ=1) |
5490 | * when it finds something wrong. | |
eee6c32f AL |
5491 | * We ignore DRQ here and stop the HSM by |
5492 | * changing hsm_task_state to HSM_ST_ERR and | |
5493 | * let the EH abort the command or reset the device. | |
71601958 AL |
5494 | */ |
5495 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
2d3b8eea AL |
5496 | /* Some ATAPI tape drives forget to clear the ERR bit |
5497 | * when doing the next command (mostly request sense). | |
5498 | * We ignore ERR here to workaround and proceed sending | |
5499 | * the CDB. | |
5500 | */ | |
5501 | if (!(qc->dev->horkage & ATA_HORKAGE_STUCK_ERR)) { | |
5502 | ata_port_printk(ap, KERN_WARNING, | |
5503 | "DRQ=1 with device error, " | |
5504 | "dev_stat 0x%X\n", status); | |
5505 | qc->err_mask |= AC_ERR_HSM; | |
5506 | ap->hsm_task_state = HSM_ST_ERR; | |
5507 | goto fsm_start; | |
5508 | } | |
71601958 | 5509 | } |
1da177e4 | 5510 | |
bb5cb290 AL |
5511 | /* Send the CDB (atapi) or the first data block (ata pio out). |
5512 | * During the state transition, interrupt handler shouldn't | |
5513 | * be invoked before the data transfer is complete and | |
5514 | * hsm_task_state is changed. Hence, the following locking. | |
5515 | */ | |
5516 | if (in_wq) | |
ba6a1308 | 5517 | spin_lock_irqsave(ap->lock, flags); |
1da177e4 | 5518 | |
bb5cb290 AL |
5519 | if (qc->tf.protocol == ATA_PROT_PIO) { |
5520 | /* PIO data out protocol. | |
5521 | * send first data block. | |
5522 | */ | |
0565c26d | 5523 | |
bb5cb290 AL |
5524 | /* ata_pio_sectors() might change the state |
5525 | * to HSM_ST_LAST. so, the state is changed here | |
5526 | * before ata_pio_sectors(). | |
5527 | */ | |
5528 | ap->hsm_task_state = HSM_ST; | |
5529 | ata_pio_sectors(qc); | |
bb5cb290 AL |
5530 | } else |
5531 | /* send CDB */ | |
5532 | atapi_send_cdb(ap, qc); | |
5533 | ||
5534 | if (in_wq) | |
ba6a1308 | 5535 | spin_unlock_irqrestore(ap->lock, flags); |
bb5cb290 AL |
5536 | |
5537 | /* if polling, ata_pio_task() handles the rest. | |
5538 | * otherwise, interrupt handler takes over from here. | |
5539 | */ | |
e2cec771 | 5540 | break; |
1c848984 | 5541 | |
e2cec771 AL |
5542 | case HSM_ST: |
5543 | /* complete command or read/write the data register */ | |
0dc36888 | 5544 | if (qc->tf.protocol == ATAPI_PROT_PIO) { |
e2cec771 AL |
5545 | /* ATAPI PIO protocol */ |
5546 | if ((status & ATA_DRQ) == 0) { | |
3655d1d3 AL |
5547 | /* No more data to transfer or device error. |
5548 | * Device error will be tagged in HSM_ST_LAST. | |
5549 | */ | |
e2cec771 AL |
5550 | ap->hsm_task_state = HSM_ST_LAST; |
5551 | goto fsm_start; | |
5552 | } | |
1da177e4 | 5553 | |
71601958 AL |
5554 | /* Device should not ask for data transfer (DRQ=1) |
5555 | * when it finds something wrong. | |
eee6c32f AL |
5556 | * We ignore DRQ here and stop the HSM by |
5557 | * changing hsm_task_state to HSM_ST_ERR and | |
5558 | * let the EH abort the command or reset the device. | |
71601958 AL |
5559 | */ |
5560 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
44877b4e TH |
5561 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " |
5562 | "device error, dev_stat 0x%X\n", | |
5563 | status); | |
3655d1d3 | 5564 | qc->err_mask |= AC_ERR_HSM; |
eee6c32f AL |
5565 | ap->hsm_task_state = HSM_ST_ERR; |
5566 | goto fsm_start; | |
71601958 | 5567 | } |
1da177e4 | 5568 | |
e2cec771 | 5569 | atapi_pio_bytes(qc); |
7fb6ec28 | 5570 | |
e2cec771 AL |
5571 | if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) |
5572 | /* bad ireason reported by device */ | |
5573 | goto fsm_start; | |
1da177e4 | 5574 | |
e2cec771 AL |
5575 | } else { |
5576 | /* ATA PIO protocol */ | |
5577 | if (unlikely((status & ATA_DRQ) == 0)) { | |
5578 | /* handle BSY=0, DRQ=0 as error */ | |
3655d1d3 AL |
5579 | if (likely(status & (ATA_ERR | ATA_DF))) |
5580 | /* device stops HSM for abort/error */ | |
5581 | qc->err_mask |= AC_ERR_DEV; | |
5582 | else | |
55a8e2c8 TH |
5583 | /* HSM violation. Let EH handle this. |
5584 | * Phantom devices also trigger this | |
5585 | * condition. Mark hint. | |
5586 | */ | |
5587 | qc->err_mask |= AC_ERR_HSM | | |
5588 | AC_ERR_NODEV_HINT; | |
3655d1d3 | 5589 | |
e2cec771 AL |
5590 | ap->hsm_task_state = HSM_ST_ERR; |
5591 | goto fsm_start; | |
5592 | } | |
1da177e4 | 5593 | |
eee6c32f AL |
5594 | /* For PIO reads, some devices may ask for |
5595 | * data transfer (DRQ=1) alone with ERR=1. | |
5596 | * We respect DRQ here and transfer one | |
5597 | * block of junk data before changing the | |
5598 | * hsm_task_state to HSM_ST_ERR. | |
5599 | * | |
5600 | * For PIO writes, ERR=1 DRQ=1 doesn't make | |
5601 | * sense since the data block has been | |
5602 | * transferred to the device. | |
71601958 AL |
5603 | */ |
5604 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
71601958 AL |
5605 | /* data might be corrputed */ |
5606 | qc->err_mask |= AC_ERR_DEV; | |
eee6c32f AL |
5607 | |
5608 | if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { | |
5609 | ata_pio_sectors(qc); | |
eee6c32f AL |
5610 | status = ata_wait_idle(ap); |
5611 | } | |
5612 | ||
3655d1d3 AL |
5613 | if (status & (ATA_BUSY | ATA_DRQ)) |
5614 | qc->err_mask |= AC_ERR_HSM; | |
5615 | ||
eee6c32f AL |
5616 | /* ata_pio_sectors() might change the |
5617 | * state to HSM_ST_LAST. so, the state | |
5618 | * is changed after ata_pio_sectors(). | |
5619 | */ | |
5620 | ap->hsm_task_state = HSM_ST_ERR; | |
5621 | goto fsm_start; | |
71601958 AL |
5622 | } |
5623 | ||
e2cec771 AL |
5624 | ata_pio_sectors(qc); |
5625 | ||
5626 | if (ap->hsm_task_state == HSM_ST_LAST && | |
5627 | (!(qc->tf.flags & ATA_TFLAG_WRITE))) { | |
5628 | /* all data read */ | |
52a32205 | 5629 | status = ata_wait_idle(ap); |
e2cec771 AL |
5630 | goto fsm_start; |
5631 | } | |
5632 | } | |
5633 | ||
bb5cb290 | 5634 | poll_next = 1; |
1da177e4 LT |
5635 | break; |
5636 | ||
14be71f4 | 5637 | case HSM_ST_LAST: |
6912ccd5 AL |
5638 | if (unlikely(!ata_ok(status))) { |
5639 | qc->err_mask |= __ac_err_mask(status); | |
e2cec771 AL |
5640 | ap->hsm_task_state = HSM_ST_ERR; |
5641 | goto fsm_start; | |
5642 | } | |
5643 | ||
5644 | /* no more data to transfer */ | |
4332a771 | 5645 | DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", |
44877b4e | 5646 | ap->print_id, qc->dev->devno, status); |
e2cec771 | 5647 | |
6912ccd5 AL |
5648 | WARN_ON(qc->err_mask); |
5649 | ||
e2cec771 | 5650 | ap->hsm_task_state = HSM_ST_IDLE; |
1da177e4 | 5651 | |
e2cec771 | 5652 | /* complete taskfile transaction */ |
c17ea20d | 5653 | ata_hsm_qc_complete(qc, in_wq); |
bb5cb290 AL |
5654 | |
5655 | poll_next = 0; | |
1da177e4 LT |
5656 | break; |
5657 | ||
14be71f4 | 5658 | case HSM_ST_ERR: |
e2cec771 AL |
5659 | /* make sure qc->err_mask is available to |
5660 | * know what's wrong and recover | |
5661 | */ | |
5662 | WARN_ON(qc->err_mask == 0); | |
5663 | ||
5664 | ap->hsm_task_state = HSM_ST_IDLE; | |
bb5cb290 | 5665 | |
999bb6f4 | 5666 | /* complete taskfile transaction */ |
c17ea20d | 5667 | ata_hsm_qc_complete(qc, in_wq); |
bb5cb290 AL |
5668 | |
5669 | poll_next = 0; | |
e2cec771 AL |
5670 | break; |
5671 | default: | |
bb5cb290 | 5672 | poll_next = 0; |
6912ccd5 | 5673 | BUG(); |
1da177e4 LT |
5674 | } |
5675 | ||
bb5cb290 | 5676 | return poll_next; |
1da177e4 LT |
5677 | } |
5678 | ||
65f27f38 | 5679 | static void ata_pio_task(struct work_struct *work) |
8061f5f0 | 5680 | { |
65f27f38 DH |
5681 | struct ata_port *ap = |
5682 | container_of(work, struct ata_port, port_task.work); | |
5683 | struct ata_queued_cmd *qc = ap->port_task_data; | |
8061f5f0 | 5684 | u8 status; |
a1af3734 | 5685 | int poll_next; |
8061f5f0 | 5686 | |
7fb6ec28 | 5687 | fsm_start: |
a1af3734 | 5688 | WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); |
8061f5f0 | 5689 | |
a1af3734 AL |
5690 | /* |
5691 | * This is purely heuristic. This is a fast path. | |
5692 | * Sometimes when we enter, BSY will be cleared in | |
5693 | * a chk-status or two. If not, the drive is probably seeking | |
5694 | * or something. Snooze for a couple msecs, then | |
5695 | * chk-status again. If still busy, queue delayed work. | |
5696 | */ | |
5697 | status = ata_busy_wait(ap, ATA_BUSY, 5); | |
5698 | if (status & ATA_BUSY) { | |
5699 | msleep(2); | |
5700 | status = ata_busy_wait(ap, ATA_BUSY, 10); | |
5701 | if (status & ATA_BUSY) { | |
442eacc3 | 5702 | ata_pio_queue_task(ap, qc, ATA_SHORT_PAUSE); |
a1af3734 AL |
5703 | return; |
5704 | } | |
8061f5f0 TH |
5705 | } |
5706 | ||
a1af3734 AL |
5707 | /* move the HSM */ |
5708 | poll_next = ata_hsm_move(ap, qc, status, 1); | |
8061f5f0 | 5709 | |
a1af3734 AL |
5710 | /* another command or interrupt handler |
5711 | * may be running at this point. | |
5712 | */ | |
5713 | if (poll_next) | |
7fb6ec28 | 5714 | goto fsm_start; |
8061f5f0 TH |
5715 | } |
5716 | ||
1da177e4 LT |
5717 | /** |
5718 | * ata_qc_new - Request an available ATA command, for queueing | |
5719 | * @ap: Port associated with device @dev | |
5720 | * @dev: Device from whom we request an available command structure | |
5721 | * | |
5722 | * LOCKING: | |
0cba632b | 5723 | * None. |
1da177e4 LT |
5724 | */ |
5725 | ||
5726 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
5727 | { | |
5728 | struct ata_queued_cmd *qc = NULL; | |
5729 | unsigned int i; | |
5730 | ||
e3180499 | 5731 | /* no command while frozen */ |
b51e9e5d | 5732 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) |
e3180499 TH |
5733 | return NULL; |
5734 | ||
2ab7db1f TH |
5735 | /* the last tag is reserved for internal command. */ |
5736 | for (i = 0; i < ATA_MAX_QUEUE - 1; i++) | |
6cec4a39 | 5737 | if (!test_and_set_bit(i, &ap->qc_allocated)) { |
f69499f4 | 5738 | qc = __ata_qc_from_tag(ap, i); |
1da177e4 LT |
5739 | break; |
5740 | } | |
5741 | ||
5742 | if (qc) | |
5743 | qc->tag = i; | |
5744 | ||
5745 | return qc; | |
5746 | } | |
5747 | ||
5748 | /** | |
5749 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
1da177e4 LT |
5750 | * @dev: Device from whom we request an available command structure |
5751 | * | |
5752 | * LOCKING: | |
0cba632b | 5753 | * None. |
1da177e4 LT |
5754 | */ |
5755 | ||
3373efd8 | 5756 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) |
1da177e4 | 5757 | { |
9af5c9c9 | 5758 | struct ata_port *ap = dev->link->ap; |
1da177e4 LT |
5759 | struct ata_queued_cmd *qc; |
5760 | ||
5761 | qc = ata_qc_new(ap); | |
5762 | if (qc) { | |
1da177e4 LT |
5763 | qc->scsicmd = NULL; |
5764 | qc->ap = ap; | |
5765 | qc->dev = dev; | |
1da177e4 | 5766 | |
2c13b7ce | 5767 | ata_qc_reinit(qc); |
1da177e4 LT |
5768 | } |
5769 | ||
5770 | return qc; | |
5771 | } | |
5772 | ||
1da177e4 LT |
5773 | /** |
5774 | * ata_qc_free - free unused ata_queued_cmd | |
5775 | * @qc: Command to complete | |
5776 | * | |
5777 | * Designed to free unused ata_queued_cmd object | |
5778 | * in case something prevents using it. | |
5779 | * | |
5780 | * LOCKING: | |
cca3974e | 5781 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
5782 | */ |
5783 | void ata_qc_free(struct ata_queued_cmd *qc) | |
5784 | { | |
4ba946e9 TH |
5785 | struct ata_port *ap = qc->ap; |
5786 | unsigned int tag; | |
5787 | ||
a4631474 | 5788 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
1da177e4 | 5789 | |
4ba946e9 TH |
5790 | qc->flags = 0; |
5791 | tag = qc->tag; | |
5792 | if (likely(ata_tag_valid(tag))) { | |
4ba946e9 | 5793 | qc->tag = ATA_TAG_POISON; |
6cec4a39 | 5794 | clear_bit(tag, &ap->qc_allocated); |
4ba946e9 | 5795 | } |
1da177e4 LT |
5796 | } |
5797 | ||
76014427 | 5798 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 5799 | { |
dedaf2b0 | 5800 | struct ata_port *ap = qc->ap; |
9af5c9c9 | 5801 | struct ata_link *link = qc->dev->link; |
dedaf2b0 | 5802 | |
a4631474 TH |
5803 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
5804 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
1da177e4 LT |
5805 | |
5806 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
5807 | ata_sg_clean(qc); | |
5808 | ||
7401abf2 | 5809 | /* command should be marked inactive atomically with qc completion */ |
da917d69 | 5810 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
9af5c9c9 | 5811 | link->sactive &= ~(1 << qc->tag); |
da917d69 TH |
5812 | if (!link->sactive) |
5813 | ap->nr_active_links--; | |
5814 | } else { | |
9af5c9c9 | 5815 | link->active_tag = ATA_TAG_POISON; |
da917d69 TH |
5816 | ap->nr_active_links--; |
5817 | } | |
5818 | ||
5819 | /* clear exclusive status */ | |
5820 | if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && | |
5821 | ap->excl_link == link)) | |
5822 | ap->excl_link = NULL; | |
7401abf2 | 5823 | |
3f3791d3 AL |
5824 | /* atapi: mark qc as inactive to prevent the interrupt handler |
5825 | * from completing the command twice later, before the error handler | |
5826 | * is called. (when rc != 0 and atapi request sense is needed) | |
5827 | */ | |
5828 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
dedaf2b0 | 5829 | ap->qc_active &= ~(1 << qc->tag); |
3f3791d3 | 5830 | |
1da177e4 | 5831 | /* call completion callback */ |
77853bf2 | 5832 | qc->complete_fn(qc); |
1da177e4 LT |
5833 | } |
5834 | ||
39599a53 TH |
5835 | static void fill_result_tf(struct ata_queued_cmd *qc) |
5836 | { | |
5837 | struct ata_port *ap = qc->ap; | |
5838 | ||
39599a53 | 5839 | qc->result_tf.flags = qc->tf.flags; |
4742d54f | 5840 | ap->ops->tf_read(ap, &qc->result_tf); |
39599a53 TH |
5841 | } |
5842 | ||
00115e0f TH |
5843 | static void ata_verify_xfer(struct ata_queued_cmd *qc) |
5844 | { | |
5845 | struct ata_device *dev = qc->dev; | |
5846 | ||
5847 | if (ata_tag_internal(qc->tag)) | |
5848 | return; | |
5849 | ||
5850 | if (ata_is_nodata(qc->tf.protocol)) | |
5851 | return; | |
5852 | ||
5853 | if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) | |
5854 | return; | |
5855 | ||
5856 | dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; | |
5857 | } | |
5858 | ||
f686bcb8 TH |
5859 | /** |
5860 | * ata_qc_complete - Complete an active ATA command | |
5861 | * @qc: Command to complete | |
5862 | * @err_mask: ATA Status register contents | |
5863 | * | |
5864 | * Indicate to the mid and upper layers that an ATA | |
5865 | * command has completed, with either an ok or not-ok status. | |
5866 | * | |
5867 | * LOCKING: | |
cca3974e | 5868 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
5869 | */ |
5870 | void ata_qc_complete(struct ata_queued_cmd *qc) | |
5871 | { | |
5872 | struct ata_port *ap = qc->ap; | |
5873 | ||
5874 | /* XXX: New EH and old EH use different mechanisms to | |
5875 | * synchronize EH with regular execution path. | |
5876 | * | |
5877 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. | |
5878 | * Normal execution path is responsible for not accessing a | |
5879 | * failed qc. libata core enforces the rule by returning NULL | |
5880 | * from ata_qc_from_tag() for failed qcs. | |
5881 | * | |
5882 | * Old EH depends on ata_qc_complete() nullifying completion | |
5883 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does | |
5884 | * not synchronize with interrupt handler. Only PIO task is | |
5885 | * taken care of. | |
5886 | */ | |
5887 | if (ap->ops->error_handler) { | |
4dbfa39b TH |
5888 | struct ata_device *dev = qc->dev; |
5889 | struct ata_eh_info *ehi = &dev->link->eh_info; | |
5890 | ||
b51e9e5d | 5891 | WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); |
f686bcb8 TH |
5892 | |
5893 | if (unlikely(qc->err_mask)) | |
5894 | qc->flags |= ATA_QCFLAG_FAILED; | |
5895 | ||
5896 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { | |
5897 | if (!ata_tag_internal(qc->tag)) { | |
5898 | /* always fill result TF for failed qc */ | |
39599a53 | 5899 | fill_result_tf(qc); |
f686bcb8 TH |
5900 | ata_qc_schedule_eh(qc); |
5901 | return; | |
5902 | } | |
5903 | } | |
5904 | ||
5905 | /* read result TF if requested */ | |
5906 | if (qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 5907 | fill_result_tf(qc); |
f686bcb8 | 5908 | |
4dbfa39b TH |
5909 | /* Some commands need post-processing after successful |
5910 | * completion. | |
5911 | */ | |
5912 | switch (qc->tf.command) { | |
5913 | case ATA_CMD_SET_FEATURES: | |
5914 | if (qc->tf.feature != SETFEATURES_WC_ON && | |
5915 | qc->tf.feature != SETFEATURES_WC_OFF) | |
5916 | break; | |
5917 | /* fall through */ | |
5918 | case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ | |
5919 | case ATA_CMD_SET_MULTI: /* multi_count changed */ | |
5920 | /* revalidate device */ | |
5921 | ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; | |
5922 | ata_port_schedule_eh(ap); | |
5923 | break; | |
054a5fba TH |
5924 | |
5925 | case ATA_CMD_SLEEP: | |
5926 | dev->flags |= ATA_DFLAG_SLEEPING; | |
5927 | break; | |
4dbfa39b TH |
5928 | } |
5929 | ||
00115e0f TH |
5930 | if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) |
5931 | ata_verify_xfer(qc); | |
5932 | ||
f686bcb8 TH |
5933 | __ata_qc_complete(qc); |
5934 | } else { | |
5935 | if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) | |
5936 | return; | |
5937 | ||
5938 | /* read result TF if failed or requested */ | |
5939 | if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 5940 | fill_result_tf(qc); |
f686bcb8 TH |
5941 | |
5942 | __ata_qc_complete(qc); | |
5943 | } | |
5944 | } | |
5945 | ||
dedaf2b0 TH |
5946 | /** |
5947 | * ata_qc_complete_multiple - Complete multiple qcs successfully | |
5948 | * @ap: port in question | |
5949 | * @qc_active: new qc_active mask | |
5950 | * @finish_qc: LLDD callback invoked before completing a qc | |
5951 | * | |
5952 | * Complete in-flight commands. This functions is meant to be | |
5953 | * called from low-level driver's interrupt routine to complete | |
5954 | * requests normally. ap->qc_active and @qc_active is compared | |
5955 | * and commands are completed accordingly. | |
5956 | * | |
5957 | * LOCKING: | |
cca3974e | 5958 | * spin_lock_irqsave(host lock) |
dedaf2b0 TH |
5959 | * |
5960 | * RETURNS: | |
5961 | * Number of completed commands on success, -errno otherwise. | |
5962 | */ | |
5963 | int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, | |
5964 | void (*finish_qc)(struct ata_queued_cmd *)) | |
5965 | { | |
5966 | int nr_done = 0; | |
5967 | u32 done_mask; | |
5968 | int i; | |
5969 | ||
5970 | done_mask = ap->qc_active ^ qc_active; | |
5971 | ||
5972 | if (unlikely(done_mask & qc_active)) { | |
5973 | ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " | |
5974 | "(%08x->%08x)\n", ap->qc_active, qc_active); | |
5975 | return -EINVAL; | |
5976 | } | |
5977 | ||
5978 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
5979 | struct ata_queued_cmd *qc; | |
5980 | ||
5981 | if (!(done_mask & (1 << i))) | |
5982 | continue; | |
5983 | ||
5984 | if ((qc = ata_qc_from_tag(ap, i))) { | |
5985 | if (finish_qc) | |
5986 | finish_qc(qc); | |
5987 | ata_qc_complete(qc); | |
5988 | nr_done++; | |
5989 | } | |
5990 | } | |
5991 | ||
5992 | return nr_done; | |
5993 | } | |
5994 | ||
1da177e4 LT |
5995 | /** |
5996 | * ata_qc_issue - issue taskfile to device | |
5997 | * @qc: command to issue to device | |
5998 | * | |
5999 | * Prepare an ATA command to submission to device. | |
6000 | * This includes mapping the data into a DMA-able | |
6001 | * area, filling in the S/G table, and finally | |
6002 | * writing the taskfile to hardware, starting the command. | |
6003 | * | |
6004 | * LOCKING: | |
cca3974e | 6005 | * spin_lock_irqsave(host lock) |
1da177e4 | 6006 | */ |
8e0e694a | 6007 | void ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
6008 | { |
6009 | struct ata_port *ap = qc->ap; | |
9af5c9c9 | 6010 | struct ata_link *link = qc->dev->link; |
405e66b3 | 6011 | u8 prot = qc->tf.protocol; |
1da177e4 | 6012 | |
dedaf2b0 TH |
6013 | /* Make sure only one non-NCQ command is outstanding. The |
6014 | * check is skipped for old EH because it reuses active qc to | |
6015 | * request ATAPI sense. | |
6016 | */ | |
9af5c9c9 | 6017 | WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag)); |
dedaf2b0 | 6018 | |
1973a023 | 6019 | if (ata_is_ncq(prot)) { |
9af5c9c9 | 6020 | WARN_ON(link->sactive & (1 << qc->tag)); |
da917d69 TH |
6021 | |
6022 | if (!link->sactive) | |
6023 | ap->nr_active_links++; | |
9af5c9c9 | 6024 | link->sactive |= 1 << qc->tag; |
dedaf2b0 | 6025 | } else { |
9af5c9c9 | 6026 | WARN_ON(link->sactive); |
da917d69 TH |
6027 | |
6028 | ap->nr_active_links++; | |
9af5c9c9 | 6029 | link->active_tag = qc->tag; |
dedaf2b0 TH |
6030 | } |
6031 | ||
e4a70e76 | 6032 | qc->flags |= ATA_QCFLAG_ACTIVE; |
dedaf2b0 | 6033 | ap->qc_active |= 1 << qc->tag; |
e4a70e76 | 6034 | |
f92a2636 TH |
6035 | /* We guarantee to LLDs that they will have at least one |
6036 | * non-zero sg if the command is a data command. | |
6037 | */ | |
ff2aeb1e | 6038 | BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes)); |
f92a2636 | 6039 | |
405e66b3 | 6040 | if (ata_is_dma(prot) || (ata_is_pio(prot) && |
f92a2636 | 6041 | (ap->flags & ATA_FLAG_PIO_DMA))) |
001102d7 TH |
6042 | if (ata_sg_setup(qc)) |
6043 | goto sg_err; | |
1da177e4 | 6044 | |
cf480626 | 6045 | /* if device is sleeping, schedule reset and abort the link */ |
054a5fba | 6046 | if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { |
cf480626 | 6047 | link->eh_info.action |= ATA_EH_RESET; |
054a5fba TH |
6048 | ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); |
6049 | ata_link_abort(link); | |
6050 | return; | |
6051 | } | |
6052 | ||
1da177e4 LT |
6053 | ap->ops->qc_prep(qc); |
6054 | ||
8e0e694a TH |
6055 | qc->err_mask |= ap->ops->qc_issue(qc); |
6056 | if (unlikely(qc->err_mask)) | |
6057 | goto err; | |
6058 | return; | |
1da177e4 | 6059 | |
8e436af9 | 6060 | sg_err: |
8e0e694a TH |
6061 | qc->err_mask |= AC_ERR_SYSTEM; |
6062 | err: | |
6063 | ata_qc_complete(qc); | |
1da177e4 LT |
6064 | } |
6065 | ||
6066 | /** | |
6067 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner | |
6068 | * @qc: command to issue to device | |
6069 | * | |
6070 | * Using various libata functions and hooks, this function | |
6071 | * starts an ATA command. ATA commands are grouped into | |
6072 | * classes called "protocols", and issuing each type of protocol | |
6073 | * is slightly different. | |
6074 | * | |
0baab86b EF |
6075 | * May be used as the qc_issue() entry in ata_port_operations. |
6076 | * | |
1da177e4 | 6077 | * LOCKING: |
cca3974e | 6078 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
6079 | * |
6080 | * RETURNS: | |
9a3d9eb0 | 6081 | * Zero on success, AC_ERR_* mask on failure |
1da177e4 LT |
6082 | */ |
6083 | ||
9a3d9eb0 | 6084 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
1da177e4 LT |
6085 | { |
6086 | struct ata_port *ap = qc->ap; | |
6087 | ||
e50362ec AL |
6088 | /* Use polling pio if the LLD doesn't handle |
6089 | * interrupt driven pio and atapi CDB interrupt. | |
6090 | */ | |
6091 | if (ap->flags & ATA_FLAG_PIO_POLLING) { | |
6092 | switch (qc->tf.protocol) { | |
6093 | case ATA_PROT_PIO: | |
e3472cbe | 6094 | case ATA_PROT_NODATA: |
0dc36888 TH |
6095 | case ATAPI_PROT_PIO: |
6096 | case ATAPI_PROT_NODATA: | |
e50362ec AL |
6097 | qc->tf.flags |= ATA_TFLAG_POLLING; |
6098 | break; | |
0dc36888 | 6099 | case ATAPI_PROT_DMA: |
e50362ec | 6100 | if (qc->dev->flags & ATA_DFLAG_CDB_INTR) |
3a778275 | 6101 | /* see ata_dma_blacklisted() */ |
e50362ec AL |
6102 | BUG(); |
6103 | break; | |
6104 | default: | |
6105 | break; | |
6106 | } | |
6107 | } | |
6108 | ||
312f7da2 | 6109 | /* select the device */ |
1da177e4 LT |
6110 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
6111 | ||
312f7da2 | 6112 | /* start the command */ |
1da177e4 LT |
6113 | switch (qc->tf.protocol) { |
6114 | case ATA_PROT_NODATA: | |
312f7da2 AL |
6115 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
6116 | ata_qc_set_polling(qc); | |
6117 | ||
e5338254 | 6118 | ata_tf_to_host(ap, &qc->tf); |
312f7da2 AL |
6119 | ap->hsm_task_state = HSM_ST_LAST; |
6120 | ||
6121 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
442eacc3 | 6122 | ata_pio_queue_task(ap, qc, 0); |
312f7da2 | 6123 | |
1da177e4 LT |
6124 | break; |
6125 | ||
6126 | case ATA_PROT_DMA: | |
587005de | 6127 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
312f7da2 | 6128 | |
1da177e4 LT |
6129 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
6130 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
6131 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
312f7da2 | 6132 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
6133 | break; |
6134 | ||
312f7da2 AL |
6135 | case ATA_PROT_PIO: |
6136 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
6137 | ata_qc_set_polling(qc); | |
1da177e4 | 6138 | |
e5338254 | 6139 | ata_tf_to_host(ap, &qc->tf); |
312f7da2 | 6140 | |
54f00389 AL |
6141 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
6142 | /* PIO data out protocol */ | |
6143 | ap->hsm_task_state = HSM_ST_FIRST; | |
442eacc3 | 6144 | ata_pio_queue_task(ap, qc, 0); |
54f00389 AL |
6145 | |
6146 | /* always send first data block using | |
e27486db | 6147 | * the ata_pio_task() codepath. |
54f00389 | 6148 | */ |
312f7da2 | 6149 | } else { |
54f00389 AL |
6150 | /* PIO data in protocol */ |
6151 | ap->hsm_task_state = HSM_ST; | |
6152 | ||
6153 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
442eacc3 | 6154 | ata_pio_queue_task(ap, qc, 0); |
54f00389 AL |
6155 | |
6156 | /* if polling, ata_pio_task() handles the rest. | |
6157 | * otherwise, interrupt handler takes over from here. | |
6158 | */ | |
312f7da2 AL |
6159 | } |
6160 | ||
1da177e4 LT |
6161 | break; |
6162 | ||
0dc36888 TH |
6163 | case ATAPI_PROT_PIO: |
6164 | case ATAPI_PROT_NODATA: | |
312f7da2 AL |
6165 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
6166 | ata_qc_set_polling(qc); | |
6167 | ||
e5338254 | 6168 | ata_tf_to_host(ap, &qc->tf); |
f6ef65e6 | 6169 | |
312f7da2 AL |
6170 | ap->hsm_task_state = HSM_ST_FIRST; |
6171 | ||
6172 | /* send cdb by polling if no cdb interrupt */ | |
6173 | if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || | |
6174 | (qc->tf.flags & ATA_TFLAG_POLLING)) | |
442eacc3 | 6175 | ata_pio_queue_task(ap, qc, 0); |
1da177e4 LT |
6176 | break; |
6177 | ||
0dc36888 | 6178 | case ATAPI_PROT_DMA: |
587005de | 6179 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
312f7da2 | 6180 | |
1da177e4 LT |
6181 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
6182 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
312f7da2 AL |
6183 | ap->hsm_task_state = HSM_ST_FIRST; |
6184 | ||
6185 | /* send cdb by polling if no cdb interrupt */ | |
6186 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
442eacc3 | 6187 | ata_pio_queue_task(ap, qc, 0); |
1da177e4 LT |
6188 | break; |
6189 | ||
6190 | default: | |
6191 | WARN_ON(1); | |
9a3d9eb0 | 6192 | return AC_ERR_SYSTEM; |
1da177e4 LT |
6193 | } |
6194 | ||
6195 | return 0; | |
6196 | } | |
6197 | ||
1da177e4 LT |
6198 | /** |
6199 | * ata_host_intr - Handle host interrupt for given (port, task) | |
6200 | * @ap: Port on which interrupt arrived (possibly...) | |
6201 | * @qc: Taskfile currently active in engine | |
6202 | * | |
6203 | * Handle host interrupt for given queued command. Currently, | |
6204 | * only DMA interrupts are handled. All other commands are | |
6205 | * handled via polling with interrupts disabled (nIEN bit). | |
6206 | * | |
6207 | * LOCKING: | |
cca3974e | 6208 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
6209 | * |
6210 | * RETURNS: | |
6211 | * One if interrupt was handled, zero if not (shared irq). | |
6212 | */ | |
6213 | ||
2dcb407e JG |
6214 | inline unsigned int ata_host_intr(struct ata_port *ap, |
6215 | struct ata_queued_cmd *qc) | |
1da177e4 | 6216 | { |
9af5c9c9 | 6217 | struct ata_eh_info *ehi = &ap->link.eh_info; |
312f7da2 | 6218 | u8 status, host_stat = 0; |
1da177e4 | 6219 | |
312f7da2 | 6220 | VPRINTK("ata%u: protocol %d task_state %d\n", |
44877b4e | 6221 | ap->print_id, qc->tf.protocol, ap->hsm_task_state); |
1da177e4 | 6222 | |
312f7da2 AL |
6223 | /* Check whether we are expecting interrupt in this state */ |
6224 | switch (ap->hsm_task_state) { | |
6225 | case HSM_ST_FIRST: | |
6912ccd5 AL |
6226 | /* Some pre-ATAPI-4 devices assert INTRQ |
6227 | * at this state when ready to receive CDB. | |
6228 | */ | |
1da177e4 | 6229 | |
312f7da2 | 6230 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. |
405e66b3 TH |
6231 | * The flag was turned on only for atapi devices. No |
6232 | * need to check ata_is_atapi(qc->tf.protocol) again. | |
312f7da2 AL |
6233 | */ |
6234 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
1da177e4 | 6235 | goto idle_irq; |
1da177e4 | 6236 | break; |
312f7da2 AL |
6237 | case HSM_ST_LAST: |
6238 | if (qc->tf.protocol == ATA_PROT_DMA || | |
0dc36888 | 6239 | qc->tf.protocol == ATAPI_PROT_DMA) { |
312f7da2 AL |
6240 | /* check status of DMA engine */ |
6241 | host_stat = ap->ops->bmdma_status(ap); | |
44877b4e TH |
6242 | VPRINTK("ata%u: host_stat 0x%X\n", |
6243 | ap->print_id, host_stat); | |
312f7da2 AL |
6244 | |
6245 | /* if it's not our irq... */ | |
6246 | if (!(host_stat & ATA_DMA_INTR)) | |
6247 | goto idle_irq; | |
6248 | ||
6249 | /* before we do anything else, clear DMA-Start bit */ | |
6250 | ap->ops->bmdma_stop(qc); | |
a4f16610 AL |
6251 | |
6252 | if (unlikely(host_stat & ATA_DMA_ERR)) { | |
6253 | /* error when transfering data to/from memory */ | |
6254 | qc->err_mask |= AC_ERR_HOST_BUS; | |
6255 | ap->hsm_task_state = HSM_ST_ERR; | |
6256 | } | |
312f7da2 AL |
6257 | } |
6258 | break; | |
6259 | case HSM_ST: | |
6260 | break; | |
1da177e4 LT |
6261 | default: |
6262 | goto idle_irq; | |
6263 | } | |
6264 | ||
312f7da2 AL |
6265 | /* check altstatus */ |
6266 | status = ata_altstatus(ap); | |
6267 | if (status & ATA_BUSY) | |
6268 | goto idle_irq; | |
1da177e4 | 6269 | |
312f7da2 AL |
6270 | /* check main status, clearing INTRQ */ |
6271 | status = ata_chk_status(ap); | |
6272 | if (unlikely(status & ATA_BUSY)) | |
6273 | goto idle_irq; | |
1da177e4 | 6274 | |
312f7da2 AL |
6275 | /* ack bmdma irq events */ |
6276 | ap->ops->irq_clear(ap); | |
1da177e4 | 6277 | |
bb5cb290 | 6278 | ata_hsm_move(ap, qc, status, 0); |
ea54763f TH |
6279 | |
6280 | if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || | |
0dc36888 | 6281 | qc->tf.protocol == ATAPI_PROT_DMA)) |
ea54763f TH |
6282 | ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); |
6283 | ||
1da177e4 LT |
6284 | return 1; /* irq handled */ |
6285 | ||
6286 | idle_irq: | |
6287 | ap->stats.idle_irq++; | |
6288 | ||
6289 | #ifdef ATA_IRQ_TRAP | |
6290 | if ((ap->stats.idle_irq % 1000) == 0) { | |
6d32d30f JG |
6291 | ata_chk_status(ap); |
6292 | ap->ops->irq_clear(ap); | |
f15a1daf | 6293 | ata_port_printk(ap, KERN_WARNING, "irq trap\n"); |
23cfce89 | 6294 | return 1; |
1da177e4 LT |
6295 | } |
6296 | #endif | |
6297 | return 0; /* irq not handled */ | |
6298 | } | |
6299 | ||
6300 | /** | |
6301 | * ata_interrupt - Default ATA host interrupt handler | |
0cba632b | 6302 | * @irq: irq line (unused) |
cca3974e | 6303 | * @dev_instance: pointer to our ata_host information structure |
1da177e4 | 6304 | * |
0cba632b JG |
6305 | * Default interrupt handler for PCI IDE devices. Calls |
6306 | * ata_host_intr() for each port that is not disabled. | |
6307 | * | |
1da177e4 | 6308 | * LOCKING: |
cca3974e | 6309 | * Obtains host lock during operation. |
1da177e4 LT |
6310 | * |
6311 | * RETURNS: | |
0cba632b | 6312 | * IRQ_NONE or IRQ_HANDLED. |
1da177e4 LT |
6313 | */ |
6314 | ||
2dcb407e | 6315 | irqreturn_t ata_interrupt(int irq, void *dev_instance) |
1da177e4 | 6316 | { |
cca3974e | 6317 | struct ata_host *host = dev_instance; |
1da177e4 LT |
6318 | unsigned int i; |
6319 | unsigned int handled = 0; | |
6320 | unsigned long flags; | |
6321 | ||
6322 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ | |
cca3974e | 6323 | spin_lock_irqsave(&host->lock, flags); |
1da177e4 | 6324 | |
cca3974e | 6325 | for (i = 0; i < host->n_ports; i++) { |
1da177e4 LT |
6326 | struct ata_port *ap; |
6327 | ||
cca3974e | 6328 | ap = host->ports[i]; |
c1389503 | 6329 | if (ap && |
029f5468 | 6330 | !(ap->flags & ATA_FLAG_DISABLED)) { |
1da177e4 LT |
6331 | struct ata_queued_cmd *qc; |
6332 | ||
9af5c9c9 | 6333 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
312f7da2 | 6334 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && |
21b1ed74 | 6335 | (qc->flags & ATA_QCFLAG_ACTIVE)) |
1da177e4 LT |
6336 | handled |= ata_host_intr(ap, qc); |
6337 | } | |
6338 | } | |
6339 | ||
cca3974e | 6340 | spin_unlock_irqrestore(&host->lock, flags); |
1da177e4 LT |
6341 | |
6342 | return IRQ_RETVAL(handled); | |
6343 | } | |
6344 | ||
34bf2170 TH |
6345 | /** |
6346 | * sata_scr_valid - test whether SCRs are accessible | |
936fd732 | 6347 | * @link: ATA link to test SCR accessibility for |
34bf2170 | 6348 | * |
936fd732 | 6349 | * Test whether SCRs are accessible for @link. |
34bf2170 TH |
6350 | * |
6351 | * LOCKING: | |
6352 | * None. | |
6353 | * | |
6354 | * RETURNS: | |
6355 | * 1 if SCRs are accessible, 0 otherwise. | |
6356 | */ | |
936fd732 | 6357 | int sata_scr_valid(struct ata_link *link) |
34bf2170 | 6358 | { |
936fd732 TH |
6359 | struct ata_port *ap = link->ap; |
6360 | ||
a16abc0b | 6361 | return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; |
34bf2170 TH |
6362 | } |
6363 | ||
6364 | /** | |
6365 | * sata_scr_read - read SCR register of the specified port | |
936fd732 | 6366 | * @link: ATA link to read SCR for |
34bf2170 TH |
6367 | * @reg: SCR to read |
6368 | * @val: Place to store read value | |
6369 | * | |
936fd732 | 6370 | * Read SCR register @reg of @link into *@val. This function is |
633273a3 TH |
6371 | * guaranteed to succeed if @link is ap->link, the cable type of |
6372 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
6373 | * |
6374 | * LOCKING: | |
633273a3 | 6375 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
6376 | * |
6377 | * RETURNS: | |
6378 | * 0 on success, negative errno on failure. | |
6379 | */ | |
936fd732 | 6380 | int sata_scr_read(struct ata_link *link, int reg, u32 *val) |
34bf2170 | 6381 | { |
633273a3 TH |
6382 | if (ata_is_host_link(link)) { |
6383 | struct ata_port *ap = link->ap; | |
936fd732 | 6384 | |
633273a3 TH |
6385 | if (sata_scr_valid(link)) |
6386 | return ap->ops->scr_read(ap, reg, val); | |
6387 | return -EOPNOTSUPP; | |
6388 | } | |
6389 | ||
6390 | return sata_pmp_scr_read(link, reg, val); | |
34bf2170 TH |
6391 | } |
6392 | ||
6393 | /** | |
6394 | * sata_scr_write - write SCR register of the specified port | |
936fd732 | 6395 | * @link: ATA link to write SCR for |
34bf2170 TH |
6396 | * @reg: SCR to write |
6397 | * @val: value to write | |
6398 | * | |
936fd732 | 6399 | * Write @val to SCR register @reg of @link. This function is |
633273a3 TH |
6400 | * guaranteed to succeed if @link is ap->link, the cable type of |
6401 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
6402 | * |
6403 | * LOCKING: | |
633273a3 | 6404 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
6405 | * |
6406 | * RETURNS: | |
6407 | * 0 on success, negative errno on failure. | |
6408 | */ | |
936fd732 | 6409 | int sata_scr_write(struct ata_link *link, int reg, u32 val) |
34bf2170 | 6410 | { |
633273a3 TH |
6411 | if (ata_is_host_link(link)) { |
6412 | struct ata_port *ap = link->ap; | |
6413 | ||
6414 | if (sata_scr_valid(link)) | |
6415 | return ap->ops->scr_write(ap, reg, val); | |
6416 | return -EOPNOTSUPP; | |
6417 | } | |
936fd732 | 6418 | |
633273a3 | 6419 | return sata_pmp_scr_write(link, reg, val); |
34bf2170 TH |
6420 | } |
6421 | ||
6422 | /** | |
6423 | * sata_scr_write_flush - write SCR register of the specified port and flush | |
936fd732 | 6424 | * @link: ATA link to write SCR for |
34bf2170 TH |
6425 | * @reg: SCR to write |
6426 | * @val: value to write | |
6427 | * | |
6428 | * This function is identical to sata_scr_write() except that this | |
6429 | * function performs flush after writing to the register. | |
6430 | * | |
6431 | * LOCKING: | |
633273a3 | 6432 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
6433 | * |
6434 | * RETURNS: | |
6435 | * 0 on success, negative errno on failure. | |
6436 | */ | |
936fd732 | 6437 | int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) |
34bf2170 | 6438 | { |
633273a3 TH |
6439 | if (ata_is_host_link(link)) { |
6440 | struct ata_port *ap = link->ap; | |
6441 | int rc; | |
da3dbb17 | 6442 | |
633273a3 TH |
6443 | if (sata_scr_valid(link)) { |
6444 | rc = ap->ops->scr_write(ap, reg, val); | |
6445 | if (rc == 0) | |
6446 | rc = ap->ops->scr_read(ap, reg, &val); | |
6447 | return rc; | |
6448 | } | |
6449 | return -EOPNOTSUPP; | |
34bf2170 | 6450 | } |
633273a3 TH |
6451 | |
6452 | return sata_pmp_scr_write(link, reg, val); | |
34bf2170 TH |
6453 | } |
6454 | ||
6455 | /** | |
936fd732 TH |
6456 | * ata_link_online - test whether the given link is online |
6457 | * @link: ATA link to test | |
34bf2170 | 6458 | * |
936fd732 TH |
6459 | * Test whether @link is online. Note that this function returns |
6460 | * 0 if online status of @link cannot be obtained, so | |
6461 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
6462 | * |
6463 | * LOCKING: | |
6464 | * None. | |
6465 | * | |
6466 | * RETURNS: | |
6467 | * 1 if the port online status is available and online. | |
6468 | */ | |
936fd732 | 6469 | int ata_link_online(struct ata_link *link) |
34bf2170 TH |
6470 | { |
6471 | u32 sstatus; | |
6472 | ||
936fd732 TH |
6473 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
6474 | (sstatus & 0xf) == 0x3) | |
34bf2170 TH |
6475 | return 1; |
6476 | return 0; | |
6477 | } | |
6478 | ||
6479 | /** | |
936fd732 TH |
6480 | * ata_link_offline - test whether the given link is offline |
6481 | * @link: ATA link to test | |
34bf2170 | 6482 | * |
936fd732 TH |
6483 | * Test whether @link is offline. Note that this function |
6484 | * returns 0 if offline status of @link cannot be obtained, so | |
6485 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
6486 | * |
6487 | * LOCKING: | |
6488 | * None. | |
6489 | * | |
6490 | * RETURNS: | |
6491 | * 1 if the port offline status is available and offline. | |
6492 | */ | |
936fd732 | 6493 | int ata_link_offline(struct ata_link *link) |
34bf2170 TH |
6494 | { |
6495 | u32 sstatus; | |
6496 | ||
936fd732 TH |
6497 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
6498 | (sstatus & 0xf) != 0x3) | |
34bf2170 TH |
6499 | return 1; |
6500 | return 0; | |
6501 | } | |
0baab86b | 6502 | |
77b08fb5 | 6503 | int ata_flush_cache(struct ata_device *dev) |
9b847548 | 6504 | { |
977e6b9f | 6505 | unsigned int err_mask; |
9b847548 JA |
6506 | u8 cmd; |
6507 | ||
6508 | if (!ata_try_flush_cache(dev)) | |
6509 | return 0; | |
6510 | ||
6fc49adb | 6511 | if (dev->flags & ATA_DFLAG_FLUSH_EXT) |
9b847548 JA |
6512 | cmd = ATA_CMD_FLUSH_EXT; |
6513 | else | |
6514 | cmd = ATA_CMD_FLUSH; | |
6515 | ||
4f34337b AC |
6516 | /* This is wrong. On a failed flush we get back the LBA of the lost |
6517 | sector and we should (assuming it wasn't aborted as unknown) issue | |
2dcb407e | 6518 | a further flush command to continue the writeback until it |
4f34337b | 6519 | does not error */ |
977e6b9f TH |
6520 | err_mask = ata_do_simple_cmd(dev, cmd); |
6521 | if (err_mask) { | |
6522 | ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); | |
6523 | return -EIO; | |
6524 | } | |
6525 | ||
6526 | return 0; | |
9b847548 JA |
6527 | } |
6528 | ||
6ffa01d8 | 6529 | #ifdef CONFIG_PM |
cca3974e JG |
6530 | static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, |
6531 | unsigned int action, unsigned int ehi_flags, | |
6532 | int wait) | |
500530f6 TH |
6533 | { |
6534 | unsigned long flags; | |
6535 | int i, rc; | |
6536 | ||
cca3974e JG |
6537 | for (i = 0; i < host->n_ports; i++) { |
6538 | struct ata_port *ap = host->ports[i]; | |
e3667ebf | 6539 | struct ata_link *link; |
500530f6 TH |
6540 | |
6541 | /* Previous resume operation might still be in | |
6542 | * progress. Wait for PM_PENDING to clear. | |
6543 | */ | |
6544 | if (ap->pflags & ATA_PFLAG_PM_PENDING) { | |
6545 | ata_port_wait_eh(ap); | |
6546 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
6547 | } | |
6548 | ||
6549 | /* request PM ops to EH */ | |
6550 | spin_lock_irqsave(ap->lock, flags); | |
6551 | ||
6552 | ap->pm_mesg = mesg; | |
6553 | if (wait) { | |
6554 | rc = 0; | |
6555 | ap->pm_result = &rc; | |
6556 | } | |
6557 | ||
6558 | ap->pflags |= ATA_PFLAG_PM_PENDING; | |
e3667ebf TH |
6559 | __ata_port_for_each_link(link, ap) { |
6560 | link->eh_info.action |= action; | |
6561 | link->eh_info.flags |= ehi_flags; | |
6562 | } | |
500530f6 TH |
6563 | |
6564 | ata_port_schedule_eh(ap); | |
6565 | ||
6566 | spin_unlock_irqrestore(ap->lock, flags); | |
6567 | ||
6568 | /* wait and check result */ | |
6569 | if (wait) { | |
6570 | ata_port_wait_eh(ap); | |
6571 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
6572 | if (rc) | |
6573 | return rc; | |
6574 | } | |
6575 | } | |
6576 | ||
6577 | return 0; | |
6578 | } | |
6579 | ||
6580 | /** | |
cca3974e JG |
6581 | * ata_host_suspend - suspend host |
6582 | * @host: host to suspend | |
500530f6 TH |
6583 | * @mesg: PM message |
6584 | * | |
cca3974e | 6585 | * Suspend @host. Actual operation is performed by EH. This |
500530f6 TH |
6586 | * function requests EH to perform PM operations and waits for EH |
6587 | * to finish. | |
6588 | * | |
6589 | * LOCKING: | |
6590 | * Kernel thread context (may sleep). | |
6591 | * | |
6592 | * RETURNS: | |
6593 | * 0 on success, -errno on failure. | |
6594 | */ | |
cca3974e | 6595 | int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
500530f6 | 6596 | { |
9666f400 | 6597 | int rc; |
500530f6 | 6598 | |
ca77329f KCA |
6599 | /* |
6600 | * disable link pm on all ports before requesting | |
6601 | * any pm activity | |
6602 | */ | |
6603 | ata_lpm_enable(host); | |
6604 | ||
cca3974e | 6605 | rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); |
72ad6ec4 JG |
6606 | if (rc == 0) |
6607 | host->dev->power.power_state = mesg; | |
500530f6 TH |
6608 | return rc; |
6609 | } | |
6610 | ||
6611 | /** | |
cca3974e JG |
6612 | * ata_host_resume - resume host |
6613 | * @host: host to resume | |
500530f6 | 6614 | * |
cca3974e | 6615 | * Resume @host. Actual operation is performed by EH. This |
500530f6 TH |
6616 | * function requests EH to perform PM operations and returns. |
6617 | * Note that all resume operations are performed parallely. | |
6618 | * | |
6619 | * LOCKING: | |
6620 | * Kernel thread context (may sleep). | |
6621 | */ | |
cca3974e | 6622 | void ata_host_resume(struct ata_host *host) |
500530f6 | 6623 | { |
cf480626 | 6624 | ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET, |
cca3974e | 6625 | ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); |
72ad6ec4 | 6626 | host->dev->power.power_state = PMSG_ON; |
ca77329f KCA |
6627 | |
6628 | /* reenable link pm */ | |
6629 | ata_lpm_disable(host); | |
500530f6 | 6630 | } |
6ffa01d8 | 6631 | #endif |
500530f6 | 6632 | |
c893a3ae RD |
6633 | /** |
6634 | * ata_port_start - Set port up for dma. | |
6635 | * @ap: Port to initialize | |
6636 | * | |
6637 | * Called just after data structures for each port are | |
6638 | * initialized. Allocates space for PRD table. | |
6639 | * | |
6640 | * May be used as the port_start() entry in ata_port_operations. | |
6641 | * | |
6642 | * LOCKING: | |
6643 | * Inherited from caller. | |
6644 | */ | |
f0d36efd | 6645 | int ata_port_start(struct ata_port *ap) |
1da177e4 | 6646 | { |
2f1f610b | 6647 | struct device *dev = ap->dev; |
1da177e4 | 6648 | |
f0d36efd TH |
6649 | ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, |
6650 | GFP_KERNEL); | |
1da177e4 LT |
6651 | if (!ap->prd) |
6652 | return -ENOMEM; | |
6653 | ||
1da177e4 LT |
6654 | return 0; |
6655 | } | |
6656 | ||
3ef3b43d TH |
6657 | /** |
6658 | * ata_dev_init - Initialize an ata_device structure | |
6659 | * @dev: Device structure to initialize | |
6660 | * | |
6661 | * Initialize @dev in preparation for probing. | |
6662 | * | |
6663 | * LOCKING: | |
6664 | * Inherited from caller. | |
6665 | */ | |
6666 | void ata_dev_init(struct ata_device *dev) | |
6667 | { | |
9af5c9c9 TH |
6668 | struct ata_link *link = dev->link; |
6669 | struct ata_port *ap = link->ap; | |
72fa4b74 TH |
6670 | unsigned long flags; |
6671 | ||
5a04bf4b | 6672 | /* SATA spd limit is bound to the first device */ |
9af5c9c9 TH |
6673 | link->sata_spd_limit = link->hw_sata_spd_limit; |
6674 | link->sata_spd = 0; | |
5a04bf4b | 6675 | |
72fa4b74 TH |
6676 | /* High bits of dev->flags are used to record warm plug |
6677 | * requests which occur asynchronously. Synchronize using | |
cca3974e | 6678 | * host lock. |
72fa4b74 | 6679 | */ |
ba6a1308 | 6680 | spin_lock_irqsave(ap->lock, flags); |
72fa4b74 | 6681 | dev->flags &= ~ATA_DFLAG_INIT_MASK; |
3dcc323f | 6682 | dev->horkage = 0; |
ba6a1308 | 6683 | spin_unlock_irqrestore(ap->lock, flags); |
3ef3b43d | 6684 | |
72fa4b74 TH |
6685 | memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, |
6686 | sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); | |
3ef3b43d TH |
6687 | dev->pio_mask = UINT_MAX; |
6688 | dev->mwdma_mask = UINT_MAX; | |
6689 | dev->udma_mask = UINT_MAX; | |
6690 | } | |
6691 | ||
4fb37a25 TH |
6692 | /** |
6693 | * ata_link_init - Initialize an ata_link structure | |
6694 | * @ap: ATA port link is attached to | |
6695 | * @link: Link structure to initialize | |
8989805d | 6696 | * @pmp: Port multiplier port number |
4fb37a25 TH |
6697 | * |
6698 | * Initialize @link. | |
6699 | * | |
6700 | * LOCKING: | |
6701 | * Kernel thread context (may sleep) | |
6702 | */ | |
fb7fd614 | 6703 | void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) |
4fb37a25 TH |
6704 | { |
6705 | int i; | |
6706 | ||
6707 | /* clear everything except for devices */ | |
6708 | memset(link, 0, offsetof(struct ata_link, device[0])); | |
6709 | ||
6710 | link->ap = ap; | |
8989805d | 6711 | link->pmp = pmp; |
4fb37a25 TH |
6712 | link->active_tag = ATA_TAG_POISON; |
6713 | link->hw_sata_spd_limit = UINT_MAX; | |
6714 | ||
6715 | /* can't use iterator, ap isn't initialized yet */ | |
6716 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
6717 | struct ata_device *dev = &link->device[i]; | |
6718 | ||
6719 | dev->link = link; | |
6720 | dev->devno = dev - link->device; | |
6721 | ata_dev_init(dev); | |
6722 | } | |
6723 | } | |
6724 | ||
6725 | /** | |
6726 | * sata_link_init_spd - Initialize link->sata_spd_limit | |
6727 | * @link: Link to configure sata_spd_limit for | |
6728 | * | |
6729 | * Initialize @link->[hw_]sata_spd_limit to the currently | |
6730 | * configured value. | |
6731 | * | |
6732 | * LOCKING: | |
6733 | * Kernel thread context (may sleep). | |
6734 | * | |
6735 | * RETURNS: | |
6736 | * 0 on success, -errno on failure. | |
6737 | */ | |
fb7fd614 | 6738 | int sata_link_init_spd(struct ata_link *link) |
4fb37a25 | 6739 | { |
33267325 TH |
6740 | u32 scontrol; |
6741 | u8 spd; | |
4fb37a25 TH |
6742 | int rc; |
6743 | ||
6744 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); | |
6745 | if (rc) | |
6746 | return rc; | |
6747 | ||
6748 | spd = (scontrol >> 4) & 0xf; | |
6749 | if (spd) | |
6750 | link->hw_sata_spd_limit &= (1 << spd) - 1; | |
6751 | ||
33267325 TH |
6752 | ata_force_spd_limit(link); |
6753 | ||
4fb37a25 TH |
6754 | link->sata_spd_limit = link->hw_sata_spd_limit; |
6755 | ||
6756 | return 0; | |
6757 | } | |
6758 | ||
1da177e4 | 6759 | /** |
f3187195 TH |
6760 | * ata_port_alloc - allocate and initialize basic ATA port resources |
6761 | * @host: ATA host this allocated port belongs to | |
1da177e4 | 6762 | * |
f3187195 TH |
6763 | * Allocate and initialize basic ATA port resources. |
6764 | * | |
6765 | * RETURNS: | |
6766 | * Allocate ATA port on success, NULL on failure. | |
0cba632b | 6767 | * |
1da177e4 | 6768 | * LOCKING: |
f3187195 | 6769 | * Inherited from calling layer (may sleep). |
1da177e4 | 6770 | */ |
f3187195 | 6771 | struct ata_port *ata_port_alloc(struct ata_host *host) |
1da177e4 | 6772 | { |
f3187195 | 6773 | struct ata_port *ap; |
1da177e4 | 6774 | |
f3187195 TH |
6775 | DPRINTK("ENTER\n"); |
6776 | ||
6777 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); | |
6778 | if (!ap) | |
6779 | return NULL; | |
6780 | ||
f4d6d004 | 6781 | ap->pflags |= ATA_PFLAG_INITIALIZING; |
cca3974e | 6782 | ap->lock = &host->lock; |
198e0fed | 6783 | ap->flags = ATA_FLAG_DISABLED; |
f3187195 | 6784 | ap->print_id = -1; |
1da177e4 | 6785 | ap->ctl = ATA_DEVCTL_OBS; |
cca3974e | 6786 | ap->host = host; |
f3187195 | 6787 | ap->dev = host->dev; |
1da177e4 | 6788 | ap->last_ctl = 0xFF; |
bd5d825c BP |
6789 | |
6790 | #if defined(ATA_VERBOSE_DEBUG) | |
6791 | /* turn on all debugging levels */ | |
6792 | ap->msg_enable = 0x00FF; | |
6793 | #elif defined(ATA_DEBUG) | |
6794 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; | |
88574551 | 6795 | #else |
0dd4b21f | 6796 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
bd5d825c | 6797 | #endif |
1da177e4 | 6798 | |
442eacc3 | 6799 | INIT_DELAYED_WORK(&ap->port_task, ata_pio_task); |
65f27f38 DH |
6800 | INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); |
6801 | INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); | |
a72ec4ce | 6802 | INIT_LIST_HEAD(&ap->eh_done_q); |
c6cf9e99 | 6803 | init_waitqueue_head(&ap->eh_wait_q); |
5ddf24c5 TH |
6804 | init_timer_deferrable(&ap->fastdrain_timer); |
6805 | ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; | |
6806 | ap->fastdrain_timer.data = (unsigned long)ap; | |
1da177e4 | 6807 | |
838df628 | 6808 | ap->cbl = ATA_CBL_NONE; |
838df628 | 6809 | |
8989805d | 6810 | ata_link_init(ap, &ap->link, 0); |
1da177e4 LT |
6811 | |
6812 | #ifdef ATA_IRQ_TRAP | |
6813 | ap->stats.unhandled_irq = 1; | |
6814 | ap->stats.idle_irq = 1; | |
6815 | #endif | |
1da177e4 | 6816 | return ap; |
1da177e4 LT |
6817 | } |
6818 | ||
f0d36efd TH |
6819 | static void ata_host_release(struct device *gendev, void *res) |
6820 | { | |
6821 | struct ata_host *host = dev_get_drvdata(gendev); | |
6822 | int i; | |
6823 | ||
1aa506e4 TH |
6824 | for (i = 0; i < host->n_ports; i++) { |
6825 | struct ata_port *ap = host->ports[i]; | |
6826 | ||
4911487a TH |
6827 | if (!ap) |
6828 | continue; | |
6829 | ||
6830 | if (ap->scsi_host) | |
1aa506e4 TH |
6831 | scsi_host_put(ap->scsi_host); |
6832 | ||
633273a3 | 6833 | kfree(ap->pmp_link); |
4911487a | 6834 | kfree(ap); |
1aa506e4 TH |
6835 | host->ports[i] = NULL; |
6836 | } | |
6837 | ||
1aa56cca | 6838 | dev_set_drvdata(gendev, NULL); |
f0d36efd TH |
6839 | } |
6840 | ||
f3187195 TH |
6841 | /** |
6842 | * ata_host_alloc - allocate and init basic ATA host resources | |
6843 | * @dev: generic device this host is associated with | |
6844 | * @max_ports: maximum number of ATA ports associated with this host | |
6845 | * | |
6846 | * Allocate and initialize basic ATA host resources. LLD calls | |
6847 | * this function to allocate a host, initializes it fully and | |
6848 | * attaches it using ata_host_register(). | |
6849 | * | |
6850 | * @max_ports ports are allocated and host->n_ports is | |
6851 | * initialized to @max_ports. The caller is allowed to decrease | |
6852 | * host->n_ports before calling ata_host_register(). The unused | |
6853 | * ports will be automatically freed on registration. | |
6854 | * | |
6855 | * RETURNS: | |
6856 | * Allocate ATA host on success, NULL on failure. | |
6857 | * | |
6858 | * LOCKING: | |
6859 | * Inherited from calling layer (may sleep). | |
6860 | */ | |
6861 | struct ata_host *ata_host_alloc(struct device *dev, int max_ports) | |
6862 | { | |
6863 | struct ata_host *host; | |
6864 | size_t sz; | |
6865 | int i; | |
6866 | ||
6867 | DPRINTK("ENTER\n"); | |
6868 | ||
6869 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) | |
6870 | return NULL; | |
6871 | ||
6872 | /* alloc a container for our list of ATA ports (buses) */ | |
6873 | sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); | |
6874 | /* alloc a container for our list of ATA ports (buses) */ | |
6875 | host = devres_alloc(ata_host_release, sz, GFP_KERNEL); | |
6876 | if (!host) | |
6877 | goto err_out; | |
6878 | ||
6879 | devres_add(dev, host); | |
6880 | dev_set_drvdata(dev, host); | |
6881 | ||
6882 | spin_lock_init(&host->lock); | |
6883 | host->dev = dev; | |
6884 | host->n_ports = max_ports; | |
6885 | ||
6886 | /* allocate ports bound to this host */ | |
6887 | for (i = 0; i < max_ports; i++) { | |
6888 | struct ata_port *ap; | |
6889 | ||
6890 | ap = ata_port_alloc(host); | |
6891 | if (!ap) | |
6892 | goto err_out; | |
6893 | ||
6894 | ap->port_no = i; | |
6895 | host->ports[i] = ap; | |
6896 | } | |
6897 | ||
6898 | devres_remove_group(dev, NULL); | |
6899 | return host; | |
6900 | ||
6901 | err_out: | |
6902 | devres_release_group(dev, NULL); | |
6903 | return NULL; | |
6904 | } | |
6905 | ||
f5cda257 TH |
6906 | /** |
6907 | * ata_host_alloc_pinfo - alloc host and init with port_info array | |
6908 | * @dev: generic device this host is associated with | |
6909 | * @ppi: array of ATA port_info to initialize host with | |
6910 | * @n_ports: number of ATA ports attached to this host | |
6911 | * | |
6912 | * Allocate ATA host and initialize with info from @ppi. If NULL | |
6913 | * terminated, @ppi may contain fewer entries than @n_ports. The | |
6914 | * last entry will be used for the remaining ports. | |
6915 | * | |
6916 | * RETURNS: | |
6917 | * Allocate ATA host on success, NULL on failure. | |
6918 | * | |
6919 | * LOCKING: | |
6920 | * Inherited from calling layer (may sleep). | |
6921 | */ | |
6922 | struct ata_host *ata_host_alloc_pinfo(struct device *dev, | |
6923 | const struct ata_port_info * const * ppi, | |
6924 | int n_ports) | |
6925 | { | |
6926 | const struct ata_port_info *pi; | |
6927 | struct ata_host *host; | |
6928 | int i, j; | |
6929 | ||
6930 | host = ata_host_alloc(dev, n_ports); | |
6931 | if (!host) | |
6932 | return NULL; | |
6933 | ||
6934 | for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { | |
6935 | struct ata_port *ap = host->ports[i]; | |
6936 | ||
6937 | if (ppi[j]) | |
6938 | pi = ppi[j++]; | |
6939 | ||
6940 | ap->pio_mask = pi->pio_mask; | |
6941 | ap->mwdma_mask = pi->mwdma_mask; | |
6942 | ap->udma_mask = pi->udma_mask; | |
6943 | ap->flags |= pi->flags; | |
0c88758b | 6944 | ap->link.flags |= pi->link_flags; |
f5cda257 TH |
6945 | ap->ops = pi->port_ops; |
6946 | ||
6947 | if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) | |
6948 | host->ops = pi->port_ops; | |
6949 | if (!host->private_data && pi->private_data) | |
6950 | host->private_data = pi->private_data; | |
6951 | } | |
6952 | ||
6953 | return host; | |
6954 | } | |
6955 | ||
32ebbc0c TH |
6956 | static void ata_host_stop(struct device *gendev, void *res) |
6957 | { | |
6958 | struct ata_host *host = dev_get_drvdata(gendev); | |
6959 | int i; | |
6960 | ||
6961 | WARN_ON(!(host->flags & ATA_HOST_STARTED)); | |
6962 | ||
6963 | for (i = 0; i < host->n_ports; i++) { | |
6964 | struct ata_port *ap = host->ports[i]; | |
6965 | ||
6966 | if (ap->ops->port_stop) | |
6967 | ap->ops->port_stop(ap); | |
6968 | } | |
6969 | ||
6970 | if (host->ops->host_stop) | |
6971 | host->ops->host_stop(host); | |
6972 | } | |
6973 | ||
ecef7253 TH |
6974 | /** |
6975 | * ata_host_start - start and freeze ports of an ATA host | |
6976 | * @host: ATA host to start ports for | |
6977 | * | |
6978 | * Start and then freeze ports of @host. Started status is | |
6979 | * recorded in host->flags, so this function can be called | |
6980 | * multiple times. Ports are guaranteed to get started only | |
f3187195 TH |
6981 | * once. If host->ops isn't initialized yet, its set to the |
6982 | * first non-dummy port ops. | |
ecef7253 TH |
6983 | * |
6984 | * LOCKING: | |
6985 | * Inherited from calling layer (may sleep). | |
6986 | * | |
6987 | * RETURNS: | |
6988 | * 0 if all ports are started successfully, -errno otherwise. | |
6989 | */ | |
6990 | int ata_host_start(struct ata_host *host) | |
6991 | { | |
32ebbc0c TH |
6992 | int have_stop = 0; |
6993 | void *start_dr = NULL; | |
ecef7253 TH |
6994 | int i, rc; |
6995 | ||
6996 | if (host->flags & ATA_HOST_STARTED) | |
6997 | return 0; | |
6998 | ||
6999 | for (i = 0; i < host->n_ports; i++) { | |
7000 | struct ata_port *ap = host->ports[i]; | |
7001 | ||
f3187195 TH |
7002 | if (!host->ops && !ata_port_is_dummy(ap)) |
7003 | host->ops = ap->ops; | |
7004 | ||
32ebbc0c TH |
7005 | if (ap->ops->port_stop) |
7006 | have_stop = 1; | |
7007 | } | |
7008 | ||
7009 | if (host->ops->host_stop) | |
7010 | have_stop = 1; | |
7011 | ||
7012 | if (have_stop) { | |
7013 | start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); | |
7014 | if (!start_dr) | |
7015 | return -ENOMEM; | |
7016 | } | |
7017 | ||
7018 | for (i = 0; i < host->n_ports; i++) { | |
7019 | struct ata_port *ap = host->ports[i]; | |
7020 | ||
ecef7253 TH |
7021 | if (ap->ops->port_start) { |
7022 | rc = ap->ops->port_start(ap); | |
7023 | if (rc) { | |
0f9fe9b7 | 7024 | if (rc != -ENODEV) |
0f757743 AM |
7025 | dev_printk(KERN_ERR, host->dev, |
7026 | "failed to start port %d " | |
7027 | "(errno=%d)\n", i, rc); | |
ecef7253 TH |
7028 | goto err_out; |
7029 | } | |
7030 | } | |
ecef7253 TH |
7031 | ata_eh_freeze_port(ap); |
7032 | } | |
7033 | ||
32ebbc0c TH |
7034 | if (start_dr) |
7035 | devres_add(host->dev, start_dr); | |
ecef7253 TH |
7036 | host->flags |= ATA_HOST_STARTED; |
7037 | return 0; | |
7038 | ||
7039 | err_out: | |
7040 | while (--i >= 0) { | |
7041 | struct ata_port *ap = host->ports[i]; | |
7042 | ||
7043 | if (ap->ops->port_stop) | |
7044 | ap->ops->port_stop(ap); | |
7045 | } | |
32ebbc0c | 7046 | devres_free(start_dr); |
ecef7253 TH |
7047 | return rc; |
7048 | } | |
7049 | ||
b03732f0 | 7050 | /** |
cca3974e JG |
7051 | * ata_sas_host_init - Initialize a host struct |
7052 | * @host: host to initialize | |
7053 | * @dev: device host is attached to | |
7054 | * @flags: host flags | |
7055 | * @ops: port_ops | |
b03732f0 BK |
7056 | * |
7057 | * LOCKING: | |
7058 | * PCI/etc. bus probe sem. | |
7059 | * | |
7060 | */ | |
f3187195 | 7061 | /* KILLME - the only user left is ipr */ |
cca3974e JG |
7062 | void ata_host_init(struct ata_host *host, struct device *dev, |
7063 | unsigned long flags, const struct ata_port_operations *ops) | |
b03732f0 | 7064 | { |
cca3974e JG |
7065 | spin_lock_init(&host->lock); |
7066 | host->dev = dev; | |
7067 | host->flags = flags; | |
7068 | host->ops = ops; | |
b03732f0 BK |
7069 | } |
7070 | ||
f3187195 TH |
7071 | /** |
7072 | * ata_host_register - register initialized ATA host | |
7073 | * @host: ATA host to register | |
7074 | * @sht: template for SCSI host | |
7075 | * | |
7076 | * Register initialized ATA host. @host is allocated using | |
7077 | * ata_host_alloc() and fully initialized by LLD. This function | |
7078 | * starts ports, registers @host with ATA and SCSI layers and | |
7079 | * probe registered devices. | |
7080 | * | |
7081 | * LOCKING: | |
7082 | * Inherited from calling layer (may sleep). | |
7083 | * | |
7084 | * RETURNS: | |
7085 | * 0 on success, -errno otherwise. | |
7086 | */ | |
7087 | int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) | |
7088 | { | |
7089 | int i, rc; | |
7090 | ||
7091 | /* host must have been started */ | |
7092 | if (!(host->flags & ATA_HOST_STARTED)) { | |
7093 | dev_printk(KERN_ERR, host->dev, | |
7094 | "BUG: trying to register unstarted host\n"); | |
7095 | WARN_ON(1); | |
7096 | return -EINVAL; | |
7097 | } | |
7098 | ||
7099 | /* Blow away unused ports. This happens when LLD can't | |
7100 | * determine the exact number of ports to allocate at | |
7101 | * allocation time. | |
7102 | */ | |
7103 | for (i = host->n_ports; host->ports[i]; i++) | |
7104 | kfree(host->ports[i]); | |
7105 | ||
7106 | /* give ports names and add SCSI hosts */ | |
7107 | for (i = 0; i < host->n_ports; i++) | |
7108 | host->ports[i]->print_id = ata_print_id++; | |
7109 | ||
7110 | rc = ata_scsi_add_hosts(host, sht); | |
7111 | if (rc) | |
7112 | return rc; | |
7113 | ||
fafbae87 TH |
7114 | /* associate with ACPI nodes */ |
7115 | ata_acpi_associate(host); | |
7116 | ||
f3187195 TH |
7117 | /* set cable, sata_spd_limit and report */ |
7118 | for (i = 0; i < host->n_ports; i++) { | |
7119 | struct ata_port *ap = host->ports[i]; | |
f3187195 TH |
7120 | unsigned long xfer_mask; |
7121 | ||
7122 | /* set SATA cable type if still unset */ | |
7123 | if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) | |
7124 | ap->cbl = ATA_CBL_SATA; | |
7125 | ||
7126 | /* init sata_spd_limit to the current value */ | |
4fb37a25 | 7127 | sata_link_init_spd(&ap->link); |
f3187195 | 7128 | |
cbcdd875 | 7129 | /* print per-port info to dmesg */ |
f3187195 TH |
7130 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, |
7131 | ap->udma_mask); | |
7132 | ||
abf6e8ed | 7133 | if (!ata_port_is_dummy(ap)) { |
cbcdd875 TH |
7134 | ata_port_printk(ap, KERN_INFO, |
7135 | "%cATA max %s %s\n", | |
a16abc0b | 7136 | (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', |
f3187195 | 7137 | ata_mode_string(xfer_mask), |
cbcdd875 | 7138 | ap->link.eh_info.desc); |
abf6e8ed TH |
7139 | ata_ehi_clear_desc(&ap->link.eh_info); |
7140 | } else | |
f3187195 TH |
7141 | ata_port_printk(ap, KERN_INFO, "DUMMY\n"); |
7142 | } | |
7143 | ||
7144 | /* perform each probe synchronously */ | |
7145 | DPRINTK("probe begin\n"); | |
7146 | for (i = 0; i < host->n_ports; i++) { | |
7147 | struct ata_port *ap = host->ports[i]; | |
f3187195 TH |
7148 | |
7149 | /* probe */ | |
7150 | if (ap->ops->error_handler) { | |
9af5c9c9 | 7151 | struct ata_eh_info *ehi = &ap->link.eh_info; |
f3187195 TH |
7152 | unsigned long flags; |
7153 | ||
7154 | ata_port_probe(ap); | |
7155 | ||
7156 | /* kick EH for boot probing */ | |
7157 | spin_lock_irqsave(ap->lock, flags); | |
7158 | ||
b558eddd | 7159 | ehi->probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 7160 | ehi->action |= ATA_EH_RESET; |
f3187195 TH |
7161 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; |
7162 | ||
f4d6d004 | 7163 | ap->pflags &= ~ATA_PFLAG_INITIALIZING; |
f3187195 TH |
7164 | ap->pflags |= ATA_PFLAG_LOADING; |
7165 | ata_port_schedule_eh(ap); | |
7166 | ||
7167 | spin_unlock_irqrestore(ap->lock, flags); | |
7168 | ||
7169 | /* wait for EH to finish */ | |
7170 | ata_port_wait_eh(ap); | |
7171 | } else { | |
7172 | DPRINTK("ata%u: bus probe begin\n", ap->print_id); | |
7173 | rc = ata_bus_probe(ap); | |
7174 | DPRINTK("ata%u: bus probe end\n", ap->print_id); | |
7175 | ||
7176 | if (rc) { | |
7177 | /* FIXME: do something useful here? | |
7178 | * Current libata behavior will | |
7179 | * tear down everything when | |
7180 | * the module is removed | |
7181 | * or the h/w is unplugged. | |
7182 | */ | |
7183 | } | |
7184 | } | |
7185 | } | |
7186 | ||
7187 | /* probes are done, now scan each port's disk(s) */ | |
7188 | DPRINTK("host probe begin\n"); | |
7189 | for (i = 0; i < host->n_ports; i++) { | |
7190 | struct ata_port *ap = host->ports[i]; | |
7191 | ||
1ae46317 | 7192 | ata_scsi_scan_host(ap, 1); |
ca77329f | 7193 | ata_lpm_schedule(ap, ap->pm_policy); |
f3187195 TH |
7194 | } |
7195 | ||
7196 | return 0; | |
7197 | } | |
7198 | ||
f5cda257 TH |
7199 | /** |
7200 | * ata_host_activate - start host, request IRQ and register it | |
7201 | * @host: target ATA host | |
7202 | * @irq: IRQ to request | |
7203 | * @irq_handler: irq_handler used when requesting IRQ | |
7204 | * @irq_flags: irq_flags used when requesting IRQ | |
7205 | * @sht: scsi_host_template to use when registering the host | |
7206 | * | |
7207 | * After allocating an ATA host and initializing it, most libata | |
7208 | * LLDs perform three steps to activate the host - start host, | |
7209 | * request IRQ and register it. This helper takes necessasry | |
7210 | * arguments and performs the three steps in one go. | |
7211 | * | |
3d46b2e2 PM |
7212 | * An invalid IRQ skips the IRQ registration and expects the host to |
7213 | * have set polling mode on the port. In this case, @irq_handler | |
7214 | * should be NULL. | |
7215 | * | |
f5cda257 TH |
7216 | * LOCKING: |
7217 | * Inherited from calling layer (may sleep). | |
7218 | * | |
7219 | * RETURNS: | |
7220 | * 0 on success, -errno otherwise. | |
7221 | */ | |
7222 | int ata_host_activate(struct ata_host *host, int irq, | |
7223 | irq_handler_t irq_handler, unsigned long irq_flags, | |
7224 | struct scsi_host_template *sht) | |
7225 | { | |
cbcdd875 | 7226 | int i, rc; |
f5cda257 TH |
7227 | |
7228 | rc = ata_host_start(host); | |
7229 | if (rc) | |
7230 | return rc; | |
7231 | ||
3d46b2e2 PM |
7232 | /* Special case for polling mode */ |
7233 | if (!irq) { | |
7234 | WARN_ON(irq_handler); | |
7235 | return ata_host_register(host, sht); | |
7236 | } | |
7237 | ||
f5cda257 TH |
7238 | rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, |
7239 | dev_driver_string(host->dev), host); | |
7240 | if (rc) | |
7241 | return rc; | |
7242 | ||
cbcdd875 TH |
7243 | for (i = 0; i < host->n_ports; i++) |
7244 | ata_port_desc(host->ports[i], "irq %d", irq); | |
4031826b | 7245 | |
f5cda257 TH |
7246 | rc = ata_host_register(host, sht); |
7247 | /* if failed, just free the IRQ and leave ports alone */ | |
7248 | if (rc) | |
7249 | devm_free_irq(host->dev, irq, host); | |
7250 | ||
7251 | return rc; | |
7252 | } | |
7253 | ||
720ba126 TH |
7254 | /** |
7255 | * ata_port_detach - Detach ATA port in prepration of device removal | |
7256 | * @ap: ATA port to be detached | |
7257 | * | |
7258 | * Detach all ATA devices and the associated SCSI devices of @ap; | |
7259 | * then, remove the associated SCSI host. @ap is guaranteed to | |
7260 | * be quiescent on return from this function. | |
7261 | * | |
7262 | * LOCKING: | |
7263 | * Kernel thread context (may sleep). | |
7264 | */ | |
741b7763 | 7265 | static void ata_port_detach(struct ata_port *ap) |
720ba126 TH |
7266 | { |
7267 | unsigned long flags; | |
41bda9c9 | 7268 | struct ata_link *link; |
f58229f8 | 7269 | struct ata_device *dev; |
720ba126 TH |
7270 | |
7271 | if (!ap->ops->error_handler) | |
c3cf30a9 | 7272 | goto skip_eh; |
720ba126 TH |
7273 | |
7274 | /* tell EH we're leaving & flush EH */ | |
ba6a1308 | 7275 | spin_lock_irqsave(ap->lock, flags); |
b51e9e5d | 7276 | ap->pflags |= ATA_PFLAG_UNLOADING; |
ba6a1308 | 7277 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
7278 | |
7279 | ata_port_wait_eh(ap); | |
7280 | ||
7f9ad9b8 TH |
7281 | /* EH is now guaranteed to see UNLOADING - EH context belongs |
7282 | * to us. Disable all existing devices. | |
720ba126 | 7283 | */ |
41bda9c9 TH |
7284 | ata_port_for_each_link(link, ap) { |
7285 | ata_link_for_each_dev(dev, link) | |
7286 | ata_dev_disable(dev); | |
7287 | } | |
720ba126 | 7288 | |
720ba126 TH |
7289 | /* Final freeze & EH. All in-flight commands are aborted. EH |
7290 | * will be skipped and retrials will be terminated with bad | |
7291 | * target. | |
7292 | */ | |
ba6a1308 | 7293 | spin_lock_irqsave(ap->lock, flags); |
720ba126 | 7294 | ata_port_freeze(ap); /* won't be thawed */ |
ba6a1308 | 7295 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
7296 | |
7297 | ata_port_wait_eh(ap); | |
45a66c1c | 7298 | cancel_rearming_delayed_work(&ap->hotplug_task); |
720ba126 | 7299 | |
c3cf30a9 | 7300 | skip_eh: |
720ba126 | 7301 | /* remove the associated SCSI host */ |
cca3974e | 7302 | scsi_remove_host(ap->scsi_host); |
720ba126 TH |
7303 | } |
7304 | ||
0529c159 TH |
7305 | /** |
7306 | * ata_host_detach - Detach all ports of an ATA host | |
7307 | * @host: Host to detach | |
7308 | * | |
7309 | * Detach all ports of @host. | |
7310 | * | |
7311 | * LOCKING: | |
7312 | * Kernel thread context (may sleep). | |
7313 | */ | |
7314 | void ata_host_detach(struct ata_host *host) | |
7315 | { | |
7316 | int i; | |
7317 | ||
7318 | for (i = 0; i < host->n_ports; i++) | |
7319 | ata_port_detach(host->ports[i]); | |
562f0c2d TH |
7320 | |
7321 | /* the host is dead now, dissociate ACPI */ | |
7322 | ata_acpi_dissociate(host); | |
0529c159 TH |
7323 | } |
7324 | ||
1da177e4 LT |
7325 | /** |
7326 | * ata_std_ports - initialize ioaddr with standard port offsets. | |
7327 | * @ioaddr: IO address structure to be initialized | |
0baab86b EF |
7328 | * |
7329 | * Utility function which initializes data_addr, error_addr, | |
7330 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, | |
7331 | * device_addr, status_addr, and command_addr to standard offsets | |
7332 | * relative to cmd_addr. | |
7333 | * | |
7334 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. | |
1da177e4 | 7335 | */ |
0baab86b | 7336 | |
1da177e4 LT |
7337 | void ata_std_ports(struct ata_ioports *ioaddr) |
7338 | { | |
7339 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; | |
7340 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; | |
7341 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; | |
7342 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; | |
7343 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; | |
7344 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; | |
7345 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; | |
7346 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; | |
7347 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; | |
7348 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; | |
7349 | } | |
7350 | ||
0baab86b | 7351 | |
374b1873 JG |
7352 | #ifdef CONFIG_PCI |
7353 | ||
1da177e4 LT |
7354 | /** |
7355 | * ata_pci_remove_one - PCI layer callback for device removal | |
7356 | * @pdev: PCI device that was removed | |
7357 | * | |
b878ca5d TH |
7358 | * PCI layer indicates to libata via this hook that hot-unplug or |
7359 | * module unload event has occurred. Detach all ports. Resource | |
7360 | * release is handled via devres. | |
1da177e4 LT |
7361 | * |
7362 | * LOCKING: | |
7363 | * Inherited from PCI layer (may sleep). | |
7364 | */ | |
f0d36efd | 7365 | void ata_pci_remove_one(struct pci_dev *pdev) |
1da177e4 | 7366 | { |
2855568b | 7367 | struct device *dev = &pdev->dev; |
cca3974e | 7368 | struct ata_host *host = dev_get_drvdata(dev); |
1da177e4 | 7369 | |
b878ca5d | 7370 | ata_host_detach(host); |
1da177e4 LT |
7371 | } |
7372 | ||
7373 | /* move to PCI subsystem */ | |
057ace5e | 7374 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
7375 | { |
7376 | unsigned long tmp = 0; | |
7377 | ||
7378 | switch (bits->width) { | |
7379 | case 1: { | |
7380 | u8 tmp8 = 0; | |
7381 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
7382 | tmp = tmp8; | |
7383 | break; | |
7384 | } | |
7385 | case 2: { | |
7386 | u16 tmp16 = 0; | |
7387 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
7388 | tmp = tmp16; | |
7389 | break; | |
7390 | } | |
7391 | case 4: { | |
7392 | u32 tmp32 = 0; | |
7393 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
7394 | tmp = tmp32; | |
7395 | break; | |
7396 | } | |
7397 | ||
7398 | default: | |
7399 | return -EINVAL; | |
7400 | } | |
7401 | ||
7402 | tmp &= bits->mask; | |
7403 | ||
7404 | return (tmp == bits->val) ? 1 : 0; | |
7405 | } | |
9b847548 | 7406 | |
6ffa01d8 | 7407 | #ifdef CONFIG_PM |
3c5100c1 | 7408 | void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) |
9b847548 JA |
7409 | { |
7410 | pci_save_state(pdev); | |
4c90d971 | 7411 | pci_disable_device(pdev); |
500530f6 | 7412 | |
3a2d5b70 | 7413 | if (mesg.event & PM_EVENT_SLEEP) |
500530f6 | 7414 | pci_set_power_state(pdev, PCI_D3hot); |
9b847548 JA |
7415 | } |
7416 | ||
553c4aa6 | 7417 | int ata_pci_device_do_resume(struct pci_dev *pdev) |
9b847548 | 7418 | { |
553c4aa6 TH |
7419 | int rc; |
7420 | ||
9b847548 JA |
7421 | pci_set_power_state(pdev, PCI_D0); |
7422 | pci_restore_state(pdev); | |
553c4aa6 | 7423 | |
b878ca5d | 7424 | rc = pcim_enable_device(pdev); |
553c4aa6 TH |
7425 | if (rc) { |
7426 | dev_printk(KERN_ERR, &pdev->dev, | |
7427 | "failed to enable device after resume (%d)\n", rc); | |
7428 | return rc; | |
7429 | } | |
7430 | ||
9b847548 | 7431 | pci_set_master(pdev); |
553c4aa6 | 7432 | return 0; |
500530f6 TH |
7433 | } |
7434 | ||
3c5100c1 | 7435 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) |
500530f6 | 7436 | { |
cca3974e | 7437 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
500530f6 TH |
7438 | int rc = 0; |
7439 | ||
cca3974e | 7440 | rc = ata_host_suspend(host, mesg); |
500530f6 TH |
7441 | if (rc) |
7442 | return rc; | |
7443 | ||
3c5100c1 | 7444 | ata_pci_device_do_suspend(pdev, mesg); |
500530f6 TH |
7445 | |
7446 | return 0; | |
7447 | } | |
7448 | ||
7449 | int ata_pci_device_resume(struct pci_dev *pdev) | |
7450 | { | |
cca3974e | 7451 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
553c4aa6 | 7452 | int rc; |
500530f6 | 7453 | |
553c4aa6 TH |
7454 | rc = ata_pci_device_do_resume(pdev); |
7455 | if (rc == 0) | |
7456 | ata_host_resume(host); | |
7457 | return rc; | |
9b847548 | 7458 | } |
6ffa01d8 TH |
7459 | #endif /* CONFIG_PM */ |
7460 | ||
1da177e4 LT |
7461 | #endif /* CONFIG_PCI */ |
7462 | ||
33267325 TH |
7463 | static int __init ata_parse_force_one(char **cur, |
7464 | struct ata_force_ent *force_ent, | |
7465 | const char **reason) | |
7466 | { | |
7467 | /* FIXME: Currently, there's no way to tag init const data and | |
7468 | * using __initdata causes build failure on some versions of | |
7469 | * gcc. Once __initdataconst is implemented, add const to the | |
7470 | * following structure. | |
7471 | */ | |
7472 | static struct ata_force_param force_tbl[] __initdata = { | |
7473 | { "40c", .cbl = ATA_CBL_PATA40 }, | |
7474 | { "80c", .cbl = ATA_CBL_PATA80 }, | |
7475 | { "short40c", .cbl = ATA_CBL_PATA40_SHORT }, | |
7476 | { "unk", .cbl = ATA_CBL_PATA_UNK }, | |
7477 | { "ign", .cbl = ATA_CBL_PATA_IGN }, | |
7478 | { "sata", .cbl = ATA_CBL_SATA }, | |
7479 | { "1.5Gbps", .spd_limit = 1 }, | |
7480 | { "3.0Gbps", .spd_limit = 2 }, | |
7481 | { "noncq", .horkage_on = ATA_HORKAGE_NONCQ }, | |
7482 | { "ncq", .horkage_off = ATA_HORKAGE_NONCQ }, | |
7483 | { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) }, | |
7484 | { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) }, | |
7485 | { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) }, | |
7486 | { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) }, | |
7487 | { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) }, | |
7488 | { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) }, | |
7489 | { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) }, | |
7490 | { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) }, | |
7491 | { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) }, | |
7492 | { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) }, | |
7493 | { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) }, | |
7494 | { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) }, | |
7495 | { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
7496 | { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
7497 | { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
7498 | { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
7499 | { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
7500 | { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
7501 | { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
7502 | { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
7503 | { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
7504 | { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
7505 | { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
7506 | { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
7507 | { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
7508 | { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
7509 | { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
7510 | { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
7511 | { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
7512 | { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
7513 | { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
7514 | { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
7515 | { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
7516 | { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) }, | |
7517 | }; | |
7518 | char *start = *cur, *p = *cur; | |
7519 | char *id, *val, *endp; | |
7520 | const struct ata_force_param *match_fp = NULL; | |
7521 | int nr_matches = 0, i; | |
7522 | ||
7523 | /* find where this param ends and update *cur */ | |
7524 | while (*p != '\0' && *p != ',') | |
7525 | p++; | |
7526 | ||
7527 | if (*p == '\0') | |
7528 | *cur = p; | |
7529 | else | |
7530 | *cur = p + 1; | |
7531 | ||
7532 | *p = '\0'; | |
7533 | ||
7534 | /* parse */ | |
7535 | p = strchr(start, ':'); | |
7536 | if (!p) { | |
7537 | val = strstrip(start); | |
7538 | goto parse_val; | |
7539 | } | |
7540 | *p = '\0'; | |
7541 | ||
7542 | id = strstrip(start); | |
7543 | val = strstrip(p + 1); | |
7544 | ||
7545 | /* parse id */ | |
7546 | p = strchr(id, '.'); | |
7547 | if (p) { | |
7548 | *p++ = '\0'; | |
7549 | force_ent->device = simple_strtoul(p, &endp, 10); | |
7550 | if (p == endp || *endp != '\0') { | |
7551 | *reason = "invalid device"; | |
7552 | return -EINVAL; | |
7553 | } | |
7554 | } | |
7555 | ||
7556 | force_ent->port = simple_strtoul(id, &endp, 10); | |
7557 | if (p == endp || *endp != '\0') { | |
7558 | *reason = "invalid port/link"; | |
7559 | return -EINVAL; | |
7560 | } | |
7561 | ||
7562 | parse_val: | |
7563 | /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */ | |
7564 | for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { | |
7565 | const struct ata_force_param *fp = &force_tbl[i]; | |
7566 | ||
7567 | if (strncasecmp(val, fp->name, strlen(val))) | |
7568 | continue; | |
7569 | ||
7570 | nr_matches++; | |
7571 | match_fp = fp; | |
7572 | ||
7573 | if (strcasecmp(val, fp->name) == 0) { | |
7574 | nr_matches = 1; | |
7575 | break; | |
7576 | } | |
7577 | } | |
7578 | ||
7579 | if (!nr_matches) { | |
7580 | *reason = "unknown value"; | |
7581 | return -EINVAL; | |
7582 | } | |
7583 | if (nr_matches > 1) { | |
7584 | *reason = "ambigious value"; | |
7585 | return -EINVAL; | |
7586 | } | |
7587 | ||
7588 | force_ent->param = *match_fp; | |
7589 | ||
7590 | return 0; | |
7591 | } | |
7592 | ||
7593 | static void __init ata_parse_force_param(void) | |
7594 | { | |
7595 | int idx = 0, size = 1; | |
7596 | int last_port = -1, last_device = -1; | |
7597 | char *p, *cur, *next; | |
7598 | ||
7599 | /* calculate maximum number of params and allocate force_tbl */ | |
7600 | for (p = ata_force_param_buf; *p; p++) | |
7601 | if (*p == ',') | |
7602 | size++; | |
7603 | ||
7604 | ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL); | |
7605 | if (!ata_force_tbl) { | |
7606 | printk(KERN_WARNING "ata: failed to extend force table, " | |
7607 | "libata.force ignored\n"); | |
7608 | return; | |
7609 | } | |
7610 | ||
7611 | /* parse and populate the table */ | |
7612 | for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { | |
7613 | const char *reason = ""; | |
7614 | struct ata_force_ent te = { .port = -1, .device = -1 }; | |
7615 | ||
7616 | next = cur; | |
7617 | if (ata_parse_force_one(&next, &te, &reason)) { | |
7618 | printk(KERN_WARNING "ata: failed to parse force " | |
7619 | "parameter \"%s\" (%s)\n", | |
7620 | cur, reason); | |
7621 | continue; | |
7622 | } | |
7623 | ||
7624 | if (te.port == -1) { | |
7625 | te.port = last_port; | |
7626 | te.device = last_device; | |
7627 | } | |
7628 | ||
7629 | ata_force_tbl[idx++] = te; | |
7630 | ||
7631 | last_port = te.port; | |
7632 | last_device = te.device; | |
7633 | } | |
7634 | ||
7635 | ata_force_tbl_size = idx; | |
7636 | } | |
1da177e4 | 7637 | |
1da177e4 LT |
7638 | static int __init ata_init(void) |
7639 | { | |
a8601e5f | 7640 | ata_probe_timeout *= HZ; |
33267325 TH |
7641 | |
7642 | ata_parse_force_param(); | |
7643 | ||
1da177e4 LT |
7644 | ata_wq = create_workqueue("ata"); |
7645 | if (!ata_wq) | |
7646 | return -ENOMEM; | |
7647 | ||
453b07ac TH |
7648 | ata_aux_wq = create_singlethread_workqueue("ata_aux"); |
7649 | if (!ata_aux_wq) { | |
7650 | destroy_workqueue(ata_wq); | |
7651 | return -ENOMEM; | |
7652 | } | |
7653 | ||
1da177e4 LT |
7654 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
7655 | return 0; | |
7656 | } | |
7657 | ||
7658 | static void __exit ata_exit(void) | |
7659 | { | |
33267325 | 7660 | kfree(ata_force_tbl); |
1da177e4 | 7661 | destroy_workqueue(ata_wq); |
453b07ac | 7662 | destroy_workqueue(ata_aux_wq); |
1da177e4 LT |
7663 | } |
7664 | ||
a4625085 | 7665 | subsys_initcall(ata_init); |
1da177e4 LT |
7666 | module_exit(ata_exit); |
7667 | ||
67846b30 | 7668 | static unsigned long ratelimit_time; |
34af946a | 7669 | static DEFINE_SPINLOCK(ata_ratelimit_lock); |
67846b30 JG |
7670 | |
7671 | int ata_ratelimit(void) | |
7672 | { | |
7673 | int rc; | |
7674 | unsigned long flags; | |
7675 | ||
7676 | spin_lock_irqsave(&ata_ratelimit_lock, flags); | |
7677 | ||
7678 | if (time_after(jiffies, ratelimit_time)) { | |
7679 | rc = 1; | |
7680 | ratelimit_time = jiffies + (HZ/5); | |
7681 | } else | |
7682 | rc = 0; | |
7683 | ||
7684 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); | |
7685 | ||
7686 | return rc; | |
7687 | } | |
7688 | ||
c22daff4 TH |
7689 | /** |
7690 | * ata_wait_register - wait until register value changes | |
7691 | * @reg: IO-mapped register | |
7692 | * @mask: Mask to apply to read register value | |
7693 | * @val: Wait condition | |
7694 | * @interval_msec: polling interval in milliseconds | |
7695 | * @timeout_msec: timeout in milliseconds | |
7696 | * | |
7697 | * Waiting for some bits of register to change is a common | |
7698 | * operation for ATA controllers. This function reads 32bit LE | |
7699 | * IO-mapped register @reg and tests for the following condition. | |
7700 | * | |
7701 | * (*@reg & mask) != val | |
7702 | * | |
7703 | * If the condition is met, it returns; otherwise, the process is | |
7704 | * repeated after @interval_msec until timeout. | |
7705 | * | |
7706 | * LOCKING: | |
7707 | * Kernel thread context (may sleep) | |
7708 | * | |
7709 | * RETURNS: | |
7710 | * The final register value. | |
7711 | */ | |
7712 | u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, | |
7713 | unsigned long interval_msec, | |
7714 | unsigned long timeout_msec) | |
7715 | { | |
7716 | unsigned long timeout; | |
7717 | u32 tmp; | |
7718 | ||
7719 | tmp = ioread32(reg); | |
7720 | ||
7721 | /* Calculate timeout _after_ the first read to make sure | |
7722 | * preceding writes reach the controller before starting to | |
7723 | * eat away the timeout. | |
7724 | */ | |
7725 | timeout = jiffies + (timeout_msec * HZ) / 1000; | |
7726 | ||
7727 | while ((tmp & mask) == val && time_before(jiffies, timeout)) { | |
7728 | msleep(interval_msec); | |
7729 | tmp = ioread32(reg); | |
7730 | } | |
7731 | ||
7732 | return tmp; | |
7733 | } | |
7734 | ||
dd5b06c4 TH |
7735 | /* |
7736 | * Dummy port_ops | |
7737 | */ | |
7738 | static void ata_dummy_noret(struct ata_port *ap) { } | |
7739 | static int ata_dummy_ret0(struct ata_port *ap) { return 0; } | |
7740 | static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } | |
7741 | ||
7742 | static u8 ata_dummy_check_status(struct ata_port *ap) | |
7743 | { | |
7744 | return ATA_DRDY; | |
7745 | } | |
7746 | ||
7747 | static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) | |
7748 | { | |
7749 | return AC_ERR_SYSTEM; | |
7750 | } | |
7751 | ||
7752 | const struct ata_port_operations ata_dummy_port_ops = { | |
dd5b06c4 TH |
7753 | .check_status = ata_dummy_check_status, |
7754 | .check_altstatus = ata_dummy_check_status, | |
7755 | .dev_select = ata_noop_dev_select, | |
7756 | .qc_prep = ata_noop_qc_prep, | |
7757 | .qc_issue = ata_dummy_qc_issue, | |
7758 | .freeze = ata_dummy_noret, | |
7759 | .thaw = ata_dummy_noret, | |
7760 | .error_handler = ata_dummy_noret, | |
7761 | .post_internal_cmd = ata_dummy_qc_noret, | |
7762 | .irq_clear = ata_dummy_noret, | |
7763 | .port_start = ata_dummy_ret0, | |
7764 | .port_stop = ata_dummy_noret, | |
7765 | }; | |
7766 | ||
21b0ad4f TH |
7767 | const struct ata_port_info ata_dummy_port_info = { |
7768 | .port_ops = &ata_dummy_port_ops, | |
7769 | }; | |
7770 | ||
1da177e4 LT |
7771 | /* |
7772 | * libata is essentially a library of internal helper functions for | |
7773 | * low-level ATA host controller drivers. As such, the API/ABI is | |
7774 | * likely to change as new drivers are added and updated. | |
7775 | * Do not depend on ABI/API stability. | |
7776 | */ | |
e9c83914 TH |
7777 | EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
7778 | EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); | |
7779 | EXPORT_SYMBOL_GPL(sata_deb_timing_long); | |
dd5b06c4 | 7780 | EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
21b0ad4f | 7781 | EXPORT_SYMBOL_GPL(ata_dummy_port_info); |
1da177e4 LT |
7782 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
7783 | EXPORT_SYMBOL_GPL(ata_std_ports); | |
cca3974e | 7784 | EXPORT_SYMBOL_GPL(ata_host_init); |
f3187195 | 7785 | EXPORT_SYMBOL_GPL(ata_host_alloc); |
f5cda257 | 7786 | EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); |
ecef7253 | 7787 | EXPORT_SYMBOL_GPL(ata_host_start); |
f3187195 | 7788 | EXPORT_SYMBOL_GPL(ata_host_register); |
f5cda257 | 7789 | EXPORT_SYMBOL_GPL(ata_host_activate); |
0529c159 | 7790 | EXPORT_SYMBOL_GPL(ata_host_detach); |
1da177e4 | 7791 | EXPORT_SYMBOL_GPL(ata_sg_init); |
9a1004d0 | 7792 | EXPORT_SYMBOL_GPL(ata_hsm_move); |
f686bcb8 | 7793 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
dedaf2b0 | 7794 | EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); |
1da177e4 | 7795 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
1da177e4 LT |
7796 | EXPORT_SYMBOL_GPL(ata_tf_load); |
7797 | EXPORT_SYMBOL_GPL(ata_tf_read); | |
7798 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); | |
7799 | EXPORT_SYMBOL_GPL(ata_std_dev_select); | |
43727fbc | 7800 | EXPORT_SYMBOL_GPL(sata_print_link_status); |
436d34b3 | 7801 | EXPORT_SYMBOL_GPL(atapi_cmd_type); |
1da177e4 LT |
7802 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
7803 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
6357357c TH |
7804 | EXPORT_SYMBOL_GPL(ata_pack_xfermask); |
7805 | EXPORT_SYMBOL_GPL(ata_unpack_xfermask); | |
7806 | EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); | |
7807 | EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); | |
7808 | EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); | |
7809 | EXPORT_SYMBOL_GPL(ata_mode_string); | |
7810 | EXPORT_SYMBOL_GPL(ata_id_xfermask); | |
1da177e4 LT |
7811 | EXPORT_SYMBOL_GPL(ata_check_status); |
7812 | EXPORT_SYMBOL_GPL(ata_altstatus); | |
1da177e4 LT |
7813 | EXPORT_SYMBOL_GPL(ata_exec_command); |
7814 | EXPORT_SYMBOL_GPL(ata_port_start); | |
d92e74d3 | 7815 | EXPORT_SYMBOL_GPL(ata_sff_port_start); |
1da177e4 | 7816 | EXPORT_SYMBOL_GPL(ata_interrupt); |
04351821 | 7817 | EXPORT_SYMBOL_GPL(ata_do_set_mode); |
0d5ff566 TH |
7818 | EXPORT_SYMBOL_GPL(ata_data_xfer); |
7819 | EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); | |
31cc23b3 | 7820 | EXPORT_SYMBOL_GPL(ata_std_qc_defer); |
1da177e4 | 7821 | EXPORT_SYMBOL_GPL(ata_qc_prep); |
d26fc955 | 7822 | EXPORT_SYMBOL_GPL(ata_dumb_qc_prep); |
e46834cd | 7823 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
1da177e4 LT |
7824 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
7825 | EXPORT_SYMBOL_GPL(ata_bmdma_start); | |
7826 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); | |
358f9a77 | 7827 | EXPORT_SYMBOL_GPL(ata_noop_irq_clear); |
1da177e4 LT |
7828 | EXPORT_SYMBOL_GPL(ata_bmdma_status); |
7829 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); | |
6d97dbd7 TH |
7830 | EXPORT_SYMBOL_GPL(ata_bmdma_freeze); |
7831 | EXPORT_SYMBOL_GPL(ata_bmdma_thaw); | |
7832 | EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); | |
7833 | EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); | |
7834 | EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); | |
1da177e4 | 7835 | EXPORT_SYMBOL_GPL(ata_port_probe); |
10305f0f | 7836 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
3c567b7d | 7837 | EXPORT_SYMBOL_GPL(sata_set_spd); |
936fd732 TH |
7838 | EXPORT_SYMBOL_GPL(sata_link_debounce); |
7839 | EXPORT_SYMBOL_GPL(sata_link_resume); | |
1da177e4 | 7840 | EXPORT_SYMBOL_GPL(ata_bus_reset); |
f5914a46 | 7841 | EXPORT_SYMBOL_GPL(ata_std_prereset); |
c2bd5804 | 7842 | EXPORT_SYMBOL_GPL(ata_std_softreset); |
cc0680a5 | 7843 | EXPORT_SYMBOL_GPL(sata_link_hardreset); |
c2bd5804 TH |
7844 | EXPORT_SYMBOL_GPL(sata_std_hardreset); |
7845 | EXPORT_SYMBOL_GPL(ata_std_postreset); | |
2e9edbf8 JG |
7846 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
7847 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
1da177e4 | 7848 | EXPORT_SYMBOL_GPL(ata_port_disable); |
67846b30 | 7849 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
c22daff4 | 7850 | EXPORT_SYMBOL_GPL(ata_wait_register); |
6f8b9958 | 7851 | EXPORT_SYMBOL_GPL(ata_busy_sleep); |
88ff6eaf | 7852 | EXPORT_SYMBOL_GPL(ata_wait_after_reset); |
d4b2bab4 | 7853 | EXPORT_SYMBOL_GPL(ata_wait_ready); |
1da177e4 LT |
7854 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
7855 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); | |
1da177e4 | 7856 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
83c47bcb | 7857 | EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); |
a6e6ce8e | 7858 | EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); |
1da177e4 | 7859 | EXPORT_SYMBOL_GPL(ata_host_intr); |
34bf2170 TH |
7860 | EXPORT_SYMBOL_GPL(sata_scr_valid); |
7861 | EXPORT_SYMBOL_GPL(sata_scr_read); | |
7862 | EXPORT_SYMBOL_GPL(sata_scr_write); | |
7863 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); | |
936fd732 TH |
7864 | EXPORT_SYMBOL_GPL(ata_link_online); |
7865 | EXPORT_SYMBOL_GPL(ata_link_offline); | |
6ffa01d8 | 7866 | #ifdef CONFIG_PM |
cca3974e JG |
7867 | EXPORT_SYMBOL_GPL(ata_host_suspend); |
7868 | EXPORT_SYMBOL_GPL(ata_host_resume); | |
6ffa01d8 | 7869 | #endif /* CONFIG_PM */ |
6a62a04d TH |
7870 | EXPORT_SYMBOL_GPL(ata_id_string); |
7871 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
1da177e4 LT |
7872 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
7873 | ||
1bc4ccff | 7874 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
6357357c | 7875 | EXPORT_SYMBOL_GPL(ata_timing_find_mode); |
452503f9 AC |
7876 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
7877 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
a0f79b92 | 7878 | EXPORT_SYMBOL_GPL(ata_timing_cycle2mode); |
452503f9 | 7879 | |
1da177e4 LT |
7880 | #ifdef CONFIG_PCI |
7881 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
d583bc18 | 7882 | EXPORT_SYMBOL_GPL(ata_pci_init_sff_host); |
1626aeb8 | 7883 | EXPORT_SYMBOL_GPL(ata_pci_init_bmdma); |
d583bc18 | 7884 | EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host); |
4e6b79fa | 7885 | EXPORT_SYMBOL_GPL(ata_pci_activate_sff_host); |
1da177e4 LT |
7886 | EXPORT_SYMBOL_GPL(ata_pci_init_one); |
7887 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); | |
6ffa01d8 | 7888 | #ifdef CONFIG_PM |
500530f6 TH |
7889 | EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
7890 | EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); | |
9b847548 JA |
7891 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
7892 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
6ffa01d8 | 7893 | #endif /* CONFIG_PM */ |
67951ade AC |
7894 | EXPORT_SYMBOL_GPL(ata_pci_default_filter); |
7895 | EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); | |
1da177e4 | 7896 | #endif /* CONFIG_PCI */ |
9b847548 | 7897 | |
31f88384 | 7898 | EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch); |
3af9a77a TH |
7899 | EXPORT_SYMBOL_GPL(sata_pmp_std_prereset); |
7900 | EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset); | |
7901 | EXPORT_SYMBOL_GPL(sata_pmp_std_postreset); | |
7902 | EXPORT_SYMBOL_GPL(sata_pmp_do_eh); | |
7903 | ||
b64bbc39 TH |
7904 | EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); |
7905 | EXPORT_SYMBOL_GPL(ata_ehi_push_desc); | |
7906 | EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); | |
cbcdd875 TH |
7907 | EXPORT_SYMBOL_GPL(ata_port_desc); |
7908 | #ifdef CONFIG_PCI | |
7909 | EXPORT_SYMBOL_GPL(ata_port_pbar_desc); | |
7910 | #endif /* CONFIG_PCI */ | |
7b70fc03 | 7911 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
dbd82616 | 7912 | EXPORT_SYMBOL_GPL(ata_link_abort); |
7b70fc03 | 7913 | EXPORT_SYMBOL_GPL(ata_port_abort); |
e3180499 | 7914 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
7d77b247 | 7915 | EXPORT_SYMBOL_GPL(sata_async_notification); |
e3180499 TH |
7916 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
7917 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); | |
ece1d636 TH |
7918 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
7919 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
022bdb07 | 7920 | EXPORT_SYMBOL_GPL(ata_do_eh); |
83625006 | 7921 | EXPORT_SYMBOL_GPL(ata_irq_on); |
a619f981 | 7922 | EXPORT_SYMBOL_GPL(ata_dev_try_classify); |
be0d18df AC |
7923 | |
7924 | EXPORT_SYMBOL_GPL(ata_cable_40wire); | |
7925 | EXPORT_SYMBOL_GPL(ata_cable_80wire); | |
7926 | EXPORT_SYMBOL_GPL(ata_cable_unknown); | |
c88f90c3 | 7927 | EXPORT_SYMBOL_GPL(ata_cable_ignore); |
be0d18df | 7928 | EXPORT_SYMBOL_GPL(ata_cable_sata); |