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> | |
1da177e4 LT |
49 | #include <linux/spinlock.h> |
50 | #include <linux/blkdev.h> | |
51 | #include <linux/delay.h> | |
52 | #include <linux/timer.h> | |
53 | #include <linux/interrupt.h> | |
54 | #include <linux/completion.h> | |
55 | #include <linux/suspend.h> | |
56 | #include <linux/workqueue.h> | |
378f058c | 57 | #include <linux/scatterlist.h> |
2dcb407e | 58 | #include <linux/io.h> |
1da177e4 | 59 | #include <scsi/scsi.h> |
193515d5 | 60 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
61 | #include <scsi/scsi_host.h> |
62 | #include <linux/libata.h> | |
1da177e4 | 63 | #include <asm/byteorder.h> |
140b5e59 | 64 | #include <linux/cdrom.h> |
1da177e4 LT |
65 | |
66 | #include "libata.h" | |
67 | ||
fda0efc5 | 68 | |
d7bb4cc7 | 69 | /* debounce timing parameters in msecs { interval, duration, timeout } */ |
e9c83914 TH |
70 | const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; |
71 | const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; | |
72 | const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; | |
d7bb4cc7 | 73 | |
029cfd6b | 74 | const struct ata_port_operations ata_base_port_ops = { |
0aa1113d | 75 | .prereset = ata_std_prereset, |
203c75b8 | 76 | .postreset = ata_std_postreset, |
a1efdaba | 77 | .error_handler = ata_std_error_handler, |
029cfd6b TH |
78 | }; |
79 | ||
80 | const struct ata_port_operations sata_port_ops = { | |
81 | .inherits = &ata_base_port_ops, | |
82 | ||
83 | .qc_defer = ata_std_qc_defer, | |
57c9efdf | 84 | .hardreset = sata_std_hardreset, |
029cfd6b TH |
85 | }; |
86 | ||
3373efd8 TH |
87 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
88 | u16 heads, u16 sectors); | |
89 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev); | |
218f3d30 JG |
90 | static unsigned int ata_dev_set_feature(struct ata_device *dev, |
91 | u8 enable, u8 feature); | |
3373efd8 | 92 | static void ata_dev_xfermask(struct ata_device *dev); |
75683fe7 | 93 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev); |
1da177e4 | 94 | |
f3187195 | 95 | unsigned int ata_print_id = 1; |
1da177e4 LT |
96 | static struct workqueue_struct *ata_wq; |
97 | ||
453b07ac TH |
98 | struct workqueue_struct *ata_aux_wq; |
99 | ||
33267325 TH |
100 | struct ata_force_param { |
101 | const char *name; | |
102 | unsigned int cbl; | |
103 | int spd_limit; | |
104 | unsigned long xfer_mask; | |
105 | unsigned int horkage_on; | |
106 | unsigned int horkage_off; | |
05944bdf | 107 | unsigned int lflags; |
33267325 TH |
108 | }; |
109 | ||
110 | struct ata_force_ent { | |
111 | int port; | |
112 | int device; | |
113 | struct ata_force_param param; | |
114 | }; | |
115 | ||
116 | static struct ata_force_ent *ata_force_tbl; | |
117 | static int ata_force_tbl_size; | |
118 | ||
119 | static char ata_force_param_buf[PAGE_SIZE] __initdata; | |
7afb4222 TH |
120 | /* param_buf is thrown away after initialization, disallow read */ |
121 | module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); | |
33267325 TH |
122 | MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)"); |
123 | ||
2486fa56 | 124 | static int atapi_enabled = 1; |
1623c81e JG |
125 | module_param(atapi_enabled, int, 0444); |
126 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); | |
127 | ||
c5c61bda | 128 | static int atapi_dmadir = 0; |
95de719a AL |
129 | module_param(atapi_dmadir, int, 0444); |
130 | MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); | |
131 | ||
baf4fdfa ML |
132 | int atapi_passthru16 = 1; |
133 | module_param(atapi_passthru16, int, 0444); | |
134 | MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)"); | |
135 | ||
c3c013a2 JG |
136 | int libata_fua = 0; |
137 | module_param_named(fua, libata_fua, int, 0444); | |
138 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); | |
139 | ||
2dcb407e | 140 | static int ata_ignore_hpa; |
1e999736 AC |
141 | module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); |
142 | MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); | |
143 | ||
b3a70601 AC |
144 | static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; |
145 | module_param_named(dma, libata_dma_mask, int, 0444); | |
146 | MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); | |
147 | ||
87fbc5a0 | 148 | static int ata_probe_timeout; |
a8601e5f AM |
149 | module_param(ata_probe_timeout, int, 0444); |
150 | MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); | |
151 | ||
6ebe9d86 | 152 | int libata_noacpi = 0; |
d7d0dad6 | 153 | module_param_named(noacpi, libata_noacpi, int, 0444); |
6ebe9d86 | 154 | MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set"); |
11ef697b | 155 | |
ae8d4ee7 AC |
156 | int libata_allow_tpm = 0; |
157 | module_param_named(allow_tpm, libata_allow_tpm, int, 0444); | |
158 | MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands"); | |
159 | ||
1da177e4 LT |
160 | MODULE_AUTHOR("Jeff Garzik"); |
161 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
162 | MODULE_LICENSE("GPL"); | |
163 | MODULE_VERSION(DRV_VERSION); | |
164 | ||
0baab86b | 165 | |
aadffb68 TH |
166 | /* |
167 | * Iterator helpers. Don't use directly. | |
168 | * | |
169 | * LOCKING: | |
170 | * Host lock or EH context. | |
171 | */ | |
172 | struct ata_link *__ata_port_next_link(struct ata_port *ap, | |
173 | struct ata_link *link, bool dev_only) | |
174 | { | |
175 | /* NULL link indicates start of iteration */ | |
176 | if (!link) { | |
177 | if (dev_only && sata_pmp_attached(ap)) | |
178 | return ap->pmp_link; | |
179 | return &ap->link; | |
180 | } | |
181 | ||
b1c72916 TH |
182 | /* we just iterated over the host master link, what's next? */ |
183 | if (link == &ap->link) { | |
184 | if (!sata_pmp_attached(ap)) { | |
185 | if (unlikely(ap->slave_link) && !dev_only) | |
186 | return ap->slave_link; | |
aadffb68 | 187 | return NULL; |
b1c72916 | 188 | } |
aadffb68 TH |
189 | return ap->pmp_link; |
190 | } | |
191 | ||
b1c72916 TH |
192 | /* slave_link excludes PMP */ |
193 | if (unlikely(link == ap->slave_link)) | |
194 | return NULL; | |
195 | ||
aadffb68 TH |
196 | /* iterate to the next PMP link */ |
197 | if (++link < ap->pmp_link + ap->nr_pmp_links) | |
198 | return link; | |
199 | return NULL; | |
200 | } | |
201 | ||
b1c72916 TH |
202 | /** |
203 | * ata_dev_phys_link - find physical link for a device | |
204 | * @dev: ATA device to look up physical link for | |
205 | * | |
206 | * Look up physical link which @dev is attached to. Note that | |
207 | * this is different from @dev->link only when @dev is on slave | |
208 | * link. For all other cases, it's the same as @dev->link. | |
209 | * | |
210 | * LOCKING: | |
211 | * Don't care. | |
212 | * | |
213 | * RETURNS: | |
214 | * Pointer to the found physical link. | |
215 | */ | |
216 | struct ata_link *ata_dev_phys_link(struct ata_device *dev) | |
217 | { | |
218 | struct ata_port *ap = dev->link->ap; | |
219 | ||
220 | if (!ap->slave_link) | |
221 | return dev->link; | |
222 | if (!dev->devno) | |
223 | return &ap->link; | |
224 | return ap->slave_link; | |
225 | } | |
226 | ||
33267325 TH |
227 | /** |
228 | * ata_force_cbl - force cable type according to libata.force | |
4cdfa1b3 | 229 | * @ap: ATA port of interest |
33267325 TH |
230 | * |
231 | * Force cable type according to libata.force and whine about it. | |
232 | * The last entry which has matching port number is used, so it | |
233 | * can be specified as part of device force parameters. For | |
234 | * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the | |
235 | * same effect. | |
236 | * | |
237 | * LOCKING: | |
238 | * EH context. | |
239 | */ | |
240 | void ata_force_cbl(struct ata_port *ap) | |
241 | { | |
242 | int i; | |
243 | ||
244 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
245 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
246 | ||
247 | if (fe->port != -1 && fe->port != ap->print_id) | |
248 | continue; | |
249 | ||
250 | if (fe->param.cbl == ATA_CBL_NONE) | |
251 | continue; | |
252 | ||
253 | ap->cbl = fe->param.cbl; | |
254 | ata_port_printk(ap, KERN_NOTICE, | |
255 | "FORCE: cable set to %s\n", fe->param.name); | |
256 | return; | |
257 | } | |
258 | } | |
259 | ||
260 | /** | |
05944bdf | 261 | * ata_force_link_limits - force link limits according to libata.force |
33267325 TH |
262 | * @link: ATA link of interest |
263 | * | |
05944bdf TH |
264 | * Force link flags and SATA spd limit according to libata.force |
265 | * and whine about it. When only the port part is specified | |
266 | * (e.g. 1:), the limit applies to all links connected to both | |
267 | * the host link and all fan-out ports connected via PMP. If the | |
268 | * device part is specified as 0 (e.g. 1.00:), it specifies the | |
269 | * first fan-out link not the host link. Device number 15 always | |
b1c72916 TH |
270 | * points to the host link whether PMP is attached or not. If the |
271 | * controller has slave link, device number 16 points to it. | |
33267325 TH |
272 | * |
273 | * LOCKING: | |
274 | * EH context. | |
275 | */ | |
05944bdf | 276 | static void ata_force_link_limits(struct ata_link *link) |
33267325 | 277 | { |
05944bdf | 278 | bool did_spd = false; |
b1c72916 TH |
279 | int linkno = link->pmp; |
280 | int i; | |
33267325 TH |
281 | |
282 | if (ata_is_host_link(link)) | |
b1c72916 | 283 | linkno += 15; |
33267325 TH |
284 | |
285 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
286 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
287 | ||
288 | if (fe->port != -1 && fe->port != link->ap->print_id) | |
289 | continue; | |
290 | ||
291 | if (fe->device != -1 && fe->device != linkno) | |
292 | continue; | |
293 | ||
05944bdf TH |
294 | /* only honor the first spd limit */ |
295 | if (!did_spd && fe->param.spd_limit) { | |
296 | link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; | |
297 | ata_link_printk(link, KERN_NOTICE, | |
298 | "FORCE: PHY spd limit set to %s\n", | |
299 | fe->param.name); | |
300 | did_spd = true; | |
301 | } | |
33267325 | 302 | |
05944bdf TH |
303 | /* let lflags stack */ |
304 | if (fe->param.lflags) { | |
305 | link->flags |= fe->param.lflags; | |
306 | ata_link_printk(link, KERN_NOTICE, | |
307 | "FORCE: link flag 0x%x forced -> 0x%x\n", | |
308 | fe->param.lflags, link->flags); | |
309 | } | |
33267325 TH |
310 | } |
311 | } | |
312 | ||
313 | /** | |
314 | * ata_force_xfermask - force xfermask according to libata.force | |
315 | * @dev: ATA device of interest | |
316 | * | |
317 | * Force xfer_mask according to libata.force and whine about it. | |
318 | * For consistency with link selection, device number 15 selects | |
319 | * the first device connected to the host link. | |
320 | * | |
321 | * LOCKING: | |
322 | * EH context. | |
323 | */ | |
324 | static void ata_force_xfermask(struct ata_device *dev) | |
325 | { | |
326 | int devno = dev->link->pmp + dev->devno; | |
327 | int alt_devno = devno; | |
328 | int i; | |
329 | ||
b1c72916 TH |
330 | /* allow n.15/16 for devices attached to host port */ |
331 | if (ata_is_host_link(dev->link)) | |
332 | alt_devno += 15; | |
33267325 TH |
333 | |
334 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
335 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
336 | unsigned long pio_mask, mwdma_mask, udma_mask; | |
337 | ||
338 | if (fe->port != -1 && fe->port != dev->link->ap->print_id) | |
339 | continue; | |
340 | ||
341 | if (fe->device != -1 && fe->device != devno && | |
342 | fe->device != alt_devno) | |
343 | continue; | |
344 | ||
345 | if (!fe->param.xfer_mask) | |
346 | continue; | |
347 | ||
348 | ata_unpack_xfermask(fe->param.xfer_mask, | |
349 | &pio_mask, &mwdma_mask, &udma_mask); | |
350 | if (udma_mask) | |
351 | dev->udma_mask = udma_mask; | |
352 | else if (mwdma_mask) { | |
353 | dev->udma_mask = 0; | |
354 | dev->mwdma_mask = mwdma_mask; | |
355 | } else { | |
356 | dev->udma_mask = 0; | |
357 | dev->mwdma_mask = 0; | |
358 | dev->pio_mask = pio_mask; | |
359 | } | |
360 | ||
361 | ata_dev_printk(dev, KERN_NOTICE, | |
362 | "FORCE: xfer_mask set to %s\n", fe->param.name); | |
363 | return; | |
364 | } | |
365 | } | |
366 | ||
367 | /** | |
368 | * ata_force_horkage - force horkage according to libata.force | |
369 | * @dev: ATA device of interest | |
370 | * | |
371 | * Force horkage according to libata.force and whine about it. | |
372 | * For consistency with link selection, device number 15 selects | |
373 | * the first device connected to the host link. | |
374 | * | |
375 | * LOCKING: | |
376 | * EH context. | |
377 | */ | |
378 | static void ata_force_horkage(struct ata_device *dev) | |
379 | { | |
380 | int devno = dev->link->pmp + dev->devno; | |
381 | int alt_devno = devno; | |
382 | int i; | |
383 | ||
b1c72916 TH |
384 | /* allow n.15/16 for devices attached to host port */ |
385 | if (ata_is_host_link(dev->link)) | |
386 | alt_devno += 15; | |
33267325 TH |
387 | |
388 | for (i = 0; i < ata_force_tbl_size; i++) { | |
389 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
390 | ||
391 | if (fe->port != -1 && fe->port != dev->link->ap->print_id) | |
392 | continue; | |
393 | ||
394 | if (fe->device != -1 && fe->device != devno && | |
395 | fe->device != alt_devno) | |
396 | continue; | |
397 | ||
398 | if (!(~dev->horkage & fe->param.horkage_on) && | |
399 | !(dev->horkage & fe->param.horkage_off)) | |
400 | continue; | |
401 | ||
402 | dev->horkage |= fe->param.horkage_on; | |
403 | dev->horkage &= ~fe->param.horkage_off; | |
404 | ||
405 | ata_dev_printk(dev, KERN_NOTICE, | |
406 | "FORCE: horkage modified (%s)\n", fe->param.name); | |
407 | } | |
408 | } | |
409 | ||
436d34b3 TH |
410 | /** |
411 | * atapi_cmd_type - Determine ATAPI command type from SCSI opcode | |
412 | * @opcode: SCSI opcode | |
413 | * | |
414 | * Determine ATAPI command type from @opcode. | |
415 | * | |
416 | * LOCKING: | |
417 | * None. | |
418 | * | |
419 | * RETURNS: | |
420 | * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC} | |
421 | */ | |
422 | int atapi_cmd_type(u8 opcode) | |
423 | { | |
424 | switch (opcode) { | |
425 | case GPCMD_READ_10: | |
426 | case GPCMD_READ_12: | |
427 | return ATAPI_READ; | |
428 | ||
429 | case GPCMD_WRITE_10: | |
430 | case GPCMD_WRITE_12: | |
431 | case GPCMD_WRITE_AND_VERIFY_10: | |
432 | return ATAPI_WRITE; | |
433 | ||
434 | case GPCMD_READ_CD: | |
435 | case GPCMD_READ_CD_MSF: | |
436 | return ATAPI_READ_CD; | |
437 | ||
e52dcc48 TH |
438 | case ATA_16: |
439 | case ATA_12: | |
440 | if (atapi_passthru16) | |
441 | return ATAPI_PASS_THRU; | |
442 | /* fall thru */ | |
436d34b3 TH |
443 | default: |
444 | return ATAPI_MISC; | |
445 | } | |
446 | } | |
447 | ||
1da177e4 LT |
448 | /** |
449 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
450 | * @tf: Taskfile to convert | |
1da177e4 | 451 | * @pmp: Port multiplier port |
9977126c TH |
452 | * @is_cmd: This FIS is for command |
453 | * @fis: Buffer into which data will output | |
1da177e4 LT |
454 | * |
455 | * Converts a standard ATA taskfile to a Serial ATA | |
456 | * FIS structure (Register - Host to Device). | |
457 | * | |
458 | * LOCKING: | |
459 | * Inherited from caller. | |
460 | */ | |
9977126c | 461 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) |
1da177e4 | 462 | { |
9977126c TH |
463 | fis[0] = 0x27; /* Register - Host to Device FIS */ |
464 | fis[1] = pmp & 0xf; /* Port multiplier number*/ | |
465 | if (is_cmd) | |
466 | fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ | |
467 | ||
1da177e4 LT |
468 | fis[2] = tf->command; |
469 | fis[3] = tf->feature; | |
470 | ||
471 | fis[4] = tf->lbal; | |
472 | fis[5] = tf->lbam; | |
473 | fis[6] = tf->lbah; | |
474 | fis[7] = tf->device; | |
475 | ||
476 | fis[8] = tf->hob_lbal; | |
477 | fis[9] = tf->hob_lbam; | |
478 | fis[10] = tf->hob_lbah; | |
479 | fis[11] = tf->hob_feature; | |
480 | ||
481 | fis[12] = tf->nsect; | |
482 | fis[13] = tf->hob_nsect; | |
483 | fis[14] = 0; | |
484 | fis[15] = tf->ctl; | |
485 | ||
486 | fis[16] = 0; | |
487 | fis[17] = 0; | |
488 | fis[18] = 0; | |
489 | fis[19] = 0; | |
490 | } | |
491 | ||
492 | /** | |
493 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
494 | * @fis: Buffer from which data will be input | |
495 | * @tf: Taskfile to output | |
496 | * | |
e12a1be6 | 497 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
498 | * |
499 | * LOCKING: | |
500 | * Inherited from caller. | |
501 | */ | |
502 | ||
057ace5e | 503 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
504 | { |
505 | tf->command = fis[2]; /* status */ | |
506 | tf->feature = fis[3]; /* error */ | |
507 | ||
508 | tf->lbal = fis[4]; | |
509 | tf->lbam = fis[5]; | |
510 | tf->lbah = fis[6]; | |
511 | tf->device = fis[7]; | |
512 | ||
513 | tf->hob_lbal = fis[8]; | |
514 | tf->hob_lbam = fis[9]; | |
515 | tf->hob_lbah = fis[10]; | |
516 | ||
517 | tf->nsect = fis[12]; | |
518 | tf->hob_nsect = fis[13]; | |
519 | } | |
520 | ||
8cbd6df1 AL |
521 | static const u8 ata_rw_cmds[] = { |
522 | /* pio multi */ | |
523 | ATA_CMD_READ_MULTI, | |
524 | ATA_CMD_WRITE_MULTI, | |
525 | ATA_CMD_READ_MULTI_EXT, | |
526 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
527 | 0, |
528 | 0, | |
529 | 0, | |
530 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
531 | /* pio */ |
532 | ATA_CMD_PIO_READ, | |
533 | ATA_CMD_PIO_WRITE, | |
534 | ATA_CMD_PIO_READ_EXT, | |
535 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
536 | 0, |
537 | 0, | |
538 | 0, | |
539 | 0, | |
8cbd6df1 AL |
540 | /* dma */ |
541 | ATA_CMD_READ, | |
542 | ATA_CMD_WRITE, | |
543 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
544 | ATA_CMD_WRITE_EXT, |
545 | 0, | |
546 | 0, | |
547 | 0, | |
548 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 549 | }; |
1da177e4 LT |
550 | |
551 | /** | |
8cbd6df1 | 552 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
bd056d7e TH |
553 | * @tf: command to examine and configure |
554 | * @dev: device tf belongs to | |
1da177e4 | 555 | * |
2e9edbf8 | 556 | * Examine the device configuration and tf->flags to calculate |
8cbd6df1 | 557 | * the proper read/write commands and protocol to use. |
1da177e4 LT |
558 | * |
559 | * LOCKING: | |
560 | * caller. | |
561 | */ | |
bd056d7e | 562 | static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) |
1da177e4 | 563 | { |
9a3dccc4 | 564 | u8 cmd; |
1da177e4 | 565 | |
9a3dccc4 | 566 | int index, fua, lba48, write; |
2e9edbf8 | 567 | |
9a3dccc4 | 568 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
569 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
570 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 571 | |
8cbd6df1 AL |
572 | if (dev->flags & ATA_DFLAG_PIO) { |
573 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 574 | index = dev->multi_count ? 0 : 8; |
9af5c9c9 | 575 | } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { |
8d238e01 AC |
576 | /* Unable to use DMA due to host limitation */ |
577 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 578 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
579 | } else { |
580 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 581 | index = 16; |
8cbd6df1 | 582 | } |
1da177e4 | 583 | |
9a3dccc4 TH |
584 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
585 | if (cmd) { | |
586 | tf->command = cmd; | |
587 | return 0; | |
588 | } | |
589 | return -1; | |
1da177e4 LT |
590 | } |
591 | ||
35b649fe TH |
592 | /** |
593 | * ata_tf_read_block - Read block address from ATA taskfile | |
594 | * @tf: ATA taskfile of interest | |
595 | * @dev: ATA device @tf belongs to | |
596 | * | |
597 | * LOCKING: | |
598 | * None. | |
599 | * | |
600 | * Read block address from @tf. This function can handle all | |
601 | * three address formats - LBA, LBA48 and CHS. tf->protocol and | |
602 | * flags select the address format to use. | |
603 | * | |
604 | * RETURNS: | |
605 | * Block address read from @tf. | |
606 | */ | |
607 | u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) | |
608 | { | |
609 | u64 block = 0; | |
610 | ||
611 | if (tf->flags & ATA_TFLAG_LBA) { | |
612 | if (tf->flags & ATA_TFLAG_LBA48) { | |
613 | block |= (u64)tf->hob_lbah << 40; | |
614 | block |= (u64)tf->hob_lbam << 32; | |
44901a96 | 615 | block |= (u64)tf->hob_lbal << 24; |
35b649fe TH |
616 | } else |
617 | block |= (tf->device & 0xf) << 24; | |
618 | ||
619 | block |= tf->lbah << 16; | |
620 | block |= tf->lbam << 8; | |
621 | block |= tf->lbal; | |
622 | } else { | |
623 | u32 cyl, head, sect; | |
624 | ||
625 | cyl = tf->lbam | (tf->lbah << 8); | |
626 | head = tf->device & 0xf; | |
627 | sect = tf->lbal; | |
628 | ||
629 | block = (cyl * dev->heads + head) * dev->sectors + sect; | |
630 | } | |
631 | ||
632 | return block; | |
633 | } | |
634 | ||
bd056d7e TH |
635 | /** |
636 | * ata_build_rw_tf - Build ATA taskfile for given read/write request | |
637 | * @tf: Target ATA taskfile | |
638 | * @dev: ATA device @tf belongs to | |
639 | * @block: Block address | |
640 | * @n_block: Number of blocks | |
641 | * @tf_flags: RW/FUA etc... | |
642 | * @tag: tag | |
643 | * | |
644 | * LOCKING: | |
645 | * None. | |
646 | * | |
647 | * Build ATA taskfile @tf for read/write request described by | |
648 | * @block, @n_block, @tf_flags and @tag on @dev. | |
649 | * | |
650 | * RETURNS: | |
651 | * | |
652 | * 0 on success, -ERANGE if the request is too large for @dev, | |
653 | * -EINVAL if the request is invalid. | |
654 | */ | |
655 | int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, | |
656 | u64 block, u32 n_block, unsigned int tf_flags, | |
657 | unsigned int tag) | |
658 | { | |
659 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
660 | tf->flags |= tf_flags; | |
661 | ||
6d1245bf | 662 | if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
bd056d7e TH |
663 | /* yay, NCQ */ |
664 | if (!lba_48_ok(block, n_block)) | |
665 | return -ERANGE; | |
666 | ||
667 | tf->protocol = ATA_PROT_NCQ; | |
668 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
669 | ||
670 | if (tf->flags & ATA_TFLAG_WRITE) | |
671 | tf->command = ATA_CMD_FPDMA_WRITE; | |
672 | else | |
673 | tf->command = ATA_CMD_FPDMA_READ; | |
674 | ||
675 | tf->nsect = tag << 3; | |
676 | tf->hob_feature = (n_block >> 8) & 0xff; | |
677 | tf->feature = n_block & 0xff; | |
678 | ||
679 | tf->hob_lbah = (block >> 40) & 0xff; | |
680 | tf->hob_lbam = (block >> 32) & 0xff; | |
681 | tf->hob_lbal = (block >> 24) & 0xff; | |
682 | tf->lbah = (block >> 16) & 0xff; | |
683 | tf->lbam = (block >> 8) & 0xff; | |
684 | tf->lbal = block & 0xff; | |
685 | ||
686 | tf->device = 1 << 6; | |
687 | if (tf->flags & ATA_TFLAG_FUA) | |
688 | tf->device |= 1 << 7; | |
689 | } else if (dev->flags & ATA_DFLAG_LBA) { | |
690 | tf->flags |= ATA_TFLAG_LBA; | |
691 | ||
692 | if (lba_28_ok(block, n_block)) { | |
693 | /* use LBA28 */ | |
694 | tf->device |= (block >> 24) & 0xf; | |
695 | } else if (lba_48_ok(block, n_block)) { | |
696 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
697 | return -ERANGE; | |
698 | ||
699 | /* use LBA48 */ | |
700 | tf->flags |= ATA_TFLAG_LBA48; | |
701 | ||
702 | tf->hob_nsect = (n_block >> 8) & 0xff; | |
703 | ||
704 | tf->hob_lbah = (block >> 40) & 0xff; | |
705 | tf->hob_lbam = (block >> 32) & 0xff; | |
706 | tf->hob_lbal = (block >> 24) & 0xff; | |
707 | } else | |
708 | /* request too large even for LBA48 */ | |
709 | return -ERANGE; | |
710 | ||
711 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
712 | return -EINVAL; | |
713 | ||
714 | tf->nsect = n_block & 0xff; | |
715 | ||
716 | tf->lbah = (block >> 16) & 0xff; | |
717 | tf->lbam = (block >> 8) & 0xff; | |
718 | tf->lbal = block & 0xff; | |
719 | ||
720 | tf->device |= ATA_LBA; | |
721 | } else { | |
722 | /* CHS */ | |
723 | u32 sect, head, cyl, track; | |
724 | ||
725 | /* The request -may- be too large for CHS addressing. */ | |
726 | if (!lba_28_ok(block, n_block)) | |
727 | return -ERANGE; | |
728 | ||
729 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
730 | return -EINVAL; | |
731 | ||
732 | /* Convert LBA to CHS */ | |
733 | track = (u32)block / dev->sectors; | |
734 | cyl = track / dev->heads; | |
735 | head = track % dev->heads; | |
736 | sect = (u32)block % dev->sectors + 1; | |
737 | ||
738 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", | |
739 | (u32)block, track, cyl, head, sect); | |
740 | ||
741 | /* Check whether the converted CHS can fit. | |
742 | Cylinder: 0-65535 | |
743 | Head: 0-15 | |
744 | Sector: 1-255*/ | |
745 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
746 | return -ERANGE; | |
747 | ||
748 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
749 | tf->lbal = sect; | |
750 | tf->lbam = cyl; | |
751 | tf->lbah = cyl >> 8; | |
752 | tf->device |= head; | |
753 | } | |
754 | ||
755 | return 0; | |
756 | } | |
757 | ||
cb95d562 TH |
758 | /** |
759 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
760 | * @pio_mask: pio_mask | |
761 | * @mwdma_mask: mwdma_mask | |
762 | * @udma_mask: udma_mask | |
763 | * | |
764 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
765 | * unsigned int xfer_mask. | |
766 | * | |
767 | * LOCKING: | |
768 | * None. | |
769 | * | |
770 | * RETURNS: | |
771 | * Packed xfer_mask. | |
772 | */ | |
7dc951ae TH |
773 | unsigned long ata_pack_xfermask(unsigned long pio_mask, |
774 | unsigned long mwdma_mask, | |
775 | unsigned long udma_mask) | |
cb95d562 TH |
776 | { |
777 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
778 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
779 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
780 | } | |
781 | ||
c0489e4e TH |
782 | /** |
783 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
784 | * @xfer_mask: xfer_mask to unpack | |
785 | * @pio_mask: resulting pio_mask | |
786 | * @mwdma_mask: resulting mwdma_mask | |
787 | * @udma_mask: resulting udma_mask | |
788 | * | |
789 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
790 | * Any NULL distination masks will be ignored. | |
791 | */ | |
7dc951ae TH |
792 | void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask, |
793 | unsigned long *mwdma_mask, unsigned long *udma_mask) | |
c0489e4e TH |
794 | { |
795 | if (pio_mask) | |
796 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
797 | if (mwdma_mask) | |
798 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
799 | if (udma_mask) | |
800 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
801 | } | |
802 | ||
cb95d562 | 803 | static const struct ata_xfer_ent { |
be9a50c8 | 804 | int shift, bits; |
cb95d562 TH |
805 | u8 base; |
806 | } ata_xfer_tbl[] = { | |
70cd071e TH |
807 | { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, |
808 | { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, | |
809 | { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, | |
cb95d562 TH |
810 | { -1, }, |
811 | }; | |
812 | ||
813 | /** | |
814 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
815 | * @xfer_mask: xfer_mask of interest | |
816 | * | |
817 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
818 | * bit of @xfer_mask is considered. | |
819 | * | |
820 | * LOCKING: | |
821 | * None. | |
822 | * | |
823 | * RETURNS: | |
70cd071e | 824 | * Matching XFER_* value, 0xff if no match found. |
cb95d562 | 825 | */ |
7dc951ae | 826 | u8 ata_xfer_mask2mode(unsigned long xfer_mask) |
cb95d562 TH |
827 | { |
828 | int highbit = fls(xfer_mask) - 1; | |
829 | const struct ata_xfer_ent *ent; | |
830 | ||
831 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
832 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
833 | return ent->base + highbit - ent->shift; | |
70cd071e | 834 | return 0xff; |
cb95d562 TH |
835 | } |
836 | ||
837 | /** | |
838 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
839 | * @xfer_mode: XFER_* of interest | |
840 | * | |
841 | * Return matching xfer_mask for @xfer_mode. | |
842 | * | |
843 | * LOCKING: | |
844 | * None. | |
845 | * | |
846 | * RETURNS: | |
847 | * Matching xfer_mask, 0 if no match found. | |
848 | */ | |
7dc951ae | 849 | unsigned long ata_xfer_mode2mask(u8 xfer_mode) |
cb95d562 TH |
850 | { |
851 | const struct ata_xfer_ent *ent; | |
852 | ||
853 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
854 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
70cd071e TH |
855 | return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) |
856 | & ~((1 << ent->shift) - 1); | |
cb95d562 TH |
857 | return 0; |
858 | } | |
859 | ||
860 | /** | |
861 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
862 | * @xfer_mode: XFER_* of interest | |
863 | * | |
864 | * Return matching xfer_shift for @xfer_mode. | |
865 | * | |
866 | * LOCKING: | |
867 | * None. | |
868 | * | |
869 | * RETURNS: | |
870 | * Matching xfer_shift, -1 if no match found. | |
871 | */ | |
7dc951ae | 872 | int ata_xfer_mode2shift(unsigned long xfer_mode) |
cb95d562 TH |
873 | { |
874 | const struct ata_xfer_ent *ent; | |
875 | ||
876 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
877 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
878 | return ent->shift; | |
879 | return -1; | |
880 | } | |
881 | ||
1da177e4 | 882 | /** |
1da7b0d0 TH |
883 | * ata_mode_string - convert xfer_mask to string |
884 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
1da177e4 LT |
885 | * |
886 | * Determine string which represents the highest speed | |
1da7b0d0 | 887 | * (highest bit in @modemask). |
1da177e4 LT |
888 | * |
889 | * LOCKING: | |
890 | * None. | |
891 | * | |
892 | * RETURNS: | |
893 | * Constant C string representing highest speed listed in | |
1da7b0d0 | 894 | * @mode_mask, or the constant C string "<n/a>". |
1da177e4 | 895 | */ |
7dc951ae | 896 | const char *ata_mode_string(unsigned long xfer_mask) |
1da177e4 | 897 | { |
75f554bc TH |
898 | static const char * const xfer_mode_str[] = { |
899 | "PIO0", | |
900 | "PIO1", | |
901 | "PIO2", | |
902 | "PIO3", | |
903 | "PIO4", | |
b352e57d AC |
904 | "PIO5", |
905 | "PIO6", | |
75f554bc TH |
906 | "MWDMA0", |
907 | "MWDMA1", | |
908 | "MWDMA2", | |
b352e57d AC |
909 | "MWDMA3", |
910 | "MWDMA4", | |
75f554bc TH |
911 | "UDMA/16", |
912 | "UDMA/25", | |
913 | "UDMA/33", | |
914 | "UDMA/44", | |
915 | "UDMA/66", | |
916 | "UDMA/100", | |
917 | "UDMA/133", | |
918 | "UDMA7", | |
919 | }; | |
1da7b0d0 | 920 | int highbit; |
1da177e4 | 921 | |
1da7b0d0 TH |
922 | highbit = fls(xfer_mask) - 1; |
923 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
924 | return xfer_mode_str[highbit]; | |
1da177e4 | 925 | return "<n/a>"; |
1da177e4 LT |
926 | } |
927 | ||
4c360c81 TH |
928 | static const char *sata_spd_string(unsigned int spd) |
929 | { | |
930 | static const char * const spd_str[] = { | |
931 | "1.5 Gbps", | |
932 | "3.0 Gbps", | |
933 | }; | |
934 | ||
935 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) | |
936 | return "<unknown>"; | |
937 | return spd_str[spd - 1]; | |
938 | } | |
939 | ||
3373efd8 | 940 | void ata_dev_disable(struct ata_device *dev) |
0b8efb0a | 941 | { |
09d7f9b0 | 942 | if (ata_dev_enabled(dev)) { |
9af5c9c9 | 943 | if (ata_msg_drv(dev->link->ap)) |
09d7f9b0 | 944 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
562f0c2d | 945 | ata_acpi_on_disable(dev); |
4ae72a1e TH |
946 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | |
947 | ATA_DNXFER_QUIET); | |
0b8efb0a TH |
948 | dev->class++; |
949 | } | |
950 | } | |
951 | ||
ca77329f KCA |
952 | static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) |
953 | { | |
954 | struct ata_link *link = dev->link; | |
955 | struct ata_port *ap = link->ap; | |
956 | u32 scontrol; | |
957 | unsigned int err_mask; | |
958 | int rc; | |
959 | ||
960 | /* | |
961 | * disallow DIPM for drivers which haven't set | |
962 | * ATA_FLAG_IPM. This is because when DIPM is enabled, | |
963 | * phy ready will be set in the interrupt status on | |
964 | * state changes, which will cause some drivers to | |
965 | * think there are errors - additionally drivers will | |
966 | * need to disable hot plug. | |
967 | */ | |
968 | if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) { | |
969 | ap->pm_policy = NOT_AVAILABLE; | |
970 | return -EINVAL; | |
971 | } | |
972 | ||
973 | /* | |
974 | * For DIPM, we will only enable it for the | |
975 | * min_power setting. | |
976 | * | |
977 | * Why? Because Disks are too stupid to know that | |
978 | * If the host rejects a request to go to SLUMBER | |
979 | * they should retry at PARTIAL, and instead it | |
980 | * just would give up. So, for medium_power to | |
981 | * work at all, we need to only allow HIPM. | |
982 | */ | |
983 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); | |
984 | if (rc) | |
985 | return rc; | |
986 | ||
987 | switch (policy) { | |
988 | case MIN_POWER: | |
989 | /* no restrictions on IPM transitions */ | |
990 | scontrol &= ~(0x3 << 8); | |
991 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
992 | if (rc) | |
993 | return rc; | |
994 | ||
995 | /* enable DIPM */ | |
996 | if (dev->flags & ATA_DFLAG_DIPM) | |
997 | err_mask = ata_dev_set_feature(dev, | |
998 | SETFEATURES_SATA_ENABLE, SATA_DIPM); | |
999 | break; | |
1000 | case MEDIUM_POWER: | |
1001 | /* allow IPM to PARTIAL */ | |
1002 | scontrol &= ~(0x1 << 8); | |
1003 | scontrol |= (0x2 << 8); | |
1004 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
1005 | if (rc) | |
1006 | return rc; | |
1007 | ||
f5456b63 KCA |
1008 | /* |
1009 | * we don't have to disable DIPM since IPM flags | |
1010 | * disallow transitions to SLUMBER, which effectively | |
1011 | * disable DIPM if it does not support PARTIAL | |
1012 | */ | |
ca77329f KCA |
1013 | break; |
1014 | case NOT_AVAILABLE: | |
1015 | case MAX_PERFORMANCE: | |
1016 | /* disable all IPM transitions */ | |
1017 | scontrol |= (0x3 << 8); | |
1018 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
1019 | if (rc) | |
1020 | return rc; | |
1021 | ||
f5456b63 KCA |
1022 | /* |
1023 | * we don't have to disable DIPM since IPM flags | |
1024 | * disallow all transitions which effectively | |
1025 | * disable DIPM anyway. | |
1026 | */ | |
ca77329f KCA |
1027 | break; |
1028 | } | |
1029 | ||
1030 | /* FIXME: handle SET FEATURES failure */ | |
1031 | (void) err_mask; | |
1032 | ||
1033 | return 0; | |
1034 | } | |
1035 | ||
1036 | /** | |
1037 | * ata_dev_enable_pm - enable SATA interface power management | |
48166fd9 SH |
1038 | * @dev: device to enable power management |
1039 | * @policy: the link power management policy | |
ca77329f KCA |
1040 | * |
1041 | * Enable SATA Interface power management. This will enable | |
1042 | * Device Interface Power Management (DIPM) for min_power | |
1043 | * policy, and then call driver specific callbacks for | |
1044 | * enabling Host Initiated Power management. | |
1045 | * | |
1046 | * Locking: Caller. | |
1047 | * Returns: -EINVAL if IPM is not supported, 0 otherwise. | |
1048 | */ | |
1049 | void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy) | |
1050 | { | |
1051 | int rc = 0; | |
1052 | struct ata_port *ap = dev->link->ap; | |
1053 | ||
1054 | /* set HIPM first, then DIPM */ | |
1055 | if (ap->ops->enable_pm) | |
1056 | rc = ap->ops->enable_pm(ap, policy); | |
1057 | if (rc) | |
1058 | goto enable_pm_out; | |
1059 | rc = ata_dev_set_dipm(dev, policy); | |
1060 | ||
1061 | enable_pm_out: | |
1062 | if (rc) | |
1063 | ap->pm_policy = MAX_PERFORMANCE; | |
1064 | else | |
1065 | ap->pm_policy = policy; | |
1066 | return /* rc */; /* hopefully we can use 'rc' eventually */ | |
1067 | } | |
1068 | ||
1992a5ed | 1069 | #ifdef CONFIG_PM |
ca77329f KCA |
1070 | /** |
1071 | * ata_dev_disable_pm - disable SATA interface power management | |
48166fd9 | 1072 | * @dev: device to disable power management |
ca77329f KCA |
1073 | * |
1074 | * Disable SATA Interface power management. This will disable | |
1075 | * Device Interface Power Management (DIPM) without changing | |
1076 | * policy, call driver specific callbacks for disabling Host | |
1077 | * Initiated Power management. | |
1078 | * | |
1079 | * Locking: Caller. | |
1080 | * Returns: void | |
1081 | */ | |
1082 | static void ata_dev_disable_pm(struct ata_device *dev) | |
1083 | { | |
1084 | struct ata_port *ap = dev->link->ap; | |
1085 | ||
1086 | ata_dev_set_dipm(dev, MAX_PERFORMANCE); | |
1087 | if (ap->ops->disable_pm) | |
1088 | ap->ops->disable_pm(ap); | |
1089 | } | |
1992a5ed | 1090 | #endif /* CONFIG_PM */ |
ca77329f KCA |
1091 | |
1092 | void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy) | |
1093 | { | |
1094 | ap->pm_policy = policy; | |
3ec25ebd | 1095 | ap->link.eh_info.action |= ATA_EH_LPM; |
ca77329f KCA |
1096 | ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY; |
1097 | ata_port_schedule_eh(ap); | |
1098 | } | |
1099 | ||
1992a5ed | 1100 | #ifdef CONFIG_PM |
ca77329f KCA |
1101 | static void ata_lpm_enable(struct ata_host *host) |
1102 | { | |
1103 | struct ata_link *link; | |
1104 | struct ata_port *ap; | |
1105 | struct ata_device *dev; | |
1106 | int i; | |
1107 | ||
1108 | for (i = 0; i < host->n_ports; i++) { | |
1109 | ap = host->ports[i]; | |
1110 | ata_port_for_each_link(link, ap) { | |
1111 | ata_link_for_each_dev(dev, link) | |
1112 | ata_dev_disable_pm(dev); | |
1113 | } | |
1114 | } | |
1115 | } | |
1116 | ||
1117 | static void ata_lpm_disable(struct ata_host *host) | |
1118 | { | |
1119 | int i; | |
1120 | ||
1121 | for (i = 0; i < host->n_ports; i++) { | |
1122 | struct ata_port *ap = host->ports[i]; | |
1123 | ata_lpm_schedule(ap, ap->pm_policy); | |
1124 | } | |
1125 | } | |
1992a5ed | 1126 | #endif /* CONFIG_PM */ |
ca77329f | 1127 | |
1da177e4 LT |
1128 | /** |
1129 | * ata_dev_classify - determine device type based on ATA-spec signature | |
1130 | * @tf: ATA taskfile register set for device to be identified | |
1131 | * | |
1132 | * Determine from taskfile register contents whether a device is | |
1133 | * ATA or ATAPI, as per "Signature and persistence" section | |
1134 | * of ATA/PI spec (volume 1, sect 5.14). | |
1135 | * | |
1136 | * LOCKING: | |
1137 | * None. | |
1138 | * | |
1139 | * RETURNS: | |
633273a3 TH |
1140 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or |
1141 | * %ATA_DEV_UNKNOWN the event of failure. | |
1da177e4 | 1142 | */ |
057ace5e | 1143 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
1144 | { |
1145 | /* Apple's open source Darwin code hints that some devices only | |
1146 | * put a proper signature into the LBA mid/high registers, | |
1147 | * So, we only check those. It's sufficient for uniqueness. | |
633273a3 TH |
1148 | * |
1149 | * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate | |
1150 | * signatures for ATA and ATAPI devices attached on SerialATA, | |
1151 | * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA | |
1152 | * spec has never mentioned about using different signatures | |
1153 | * for ATA/ATAPI devices. Then, Serial ATA II: Port | |
1154 | * Multiplier specification began to use 0x69/0x96 to identify | |
1155 | * port multpliers and 0x3c/0xc3 to identify SEMB device. | |
1156 | * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and | |
1157 | * 0x69/0x96 shortly and described them as reserved for | |
1158 | * SerialATA. | |
1159 | * | |
1160 | * We follow the current spec and consider that 0x69/0x96 | |
1161 | * identifies a port multiplier and 0x3c/0xc3 a SEMB device. | |
1da177e4 | 1162 | */ |
633273a3 | 1163 | if ((tf->lbam == 0) && (tf->lbah == 0)) { |
1da177e4 LT |
1164 | DPRINTK("found ATA device by sig\n"); |
1165 | return ATA_DEV_ATA; | |
1166 | } | |
1167 | ||
633273a3 | 1168 | if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { |
1da177e4 LT |
1169 | DPRINTK("found ATAPI device by sig\n"); |
1170 | return ATA_DEV_ATAPI; | |
1171 | } | |
1172 | ||
633273a3 TH |
1173 | if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { |
1174 | DPRINTK("found PMP device by sig\n"); | |
1175 | return ATA_DEV_PMP; | |
1176 | } | |
1177 | ||
1178 | if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { | |
2dcb407e | 1179 | printk(KERN_INFO "ata: SEMB device ignored\n"); |
633273a3 TH |
1180 | return ATA_DEV_SEMB_UNSUP; /* not yet */ |
1181 | } | |
1182 | ||
1da177e4 LT |
1183 | DPRINTK("unknown device\n"); |
1184 | return ATA_DEV_UNKNOWN; | |
1185 | } | |
1186 | ||
1da177e4 | 1187 | /** |
6a62a04d | 1188 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
1189 | * @id: IDENTIFY DEVICE results we will examine |
1190 | * @s: string into which data is output | |
1191 | * @ofs: offset into identify device page | |
1192 | * @len: length of string to return. must be an even number. | |
1193 | * | |
1194 | * The strings in the IDENTIFY DEVICE page are broken up into | |
1195 | * 16-bit chunks. Run through the string, and output each | |
1196 | * 8-bit chunk linearly, regardless of platform. | |
1197 | * | |
1198 | * LOCKING: | |
1199 | * caller. | |
1200 | */ | |
1201 | ||
6a62a04d TH |
1202 | void ata_id_string(const u16 *id, unsigned char *s, |
1203 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
1204 | { |
1205 | unsigned int c; | |
1206 | ||
963e4975 AC |
1207 | BUG_ON(len & 1); |
1208 | ||
1da177e4 LT |
1209 | while (len > 0) { |
1210 | c = id[ofs] >> 8; | |
1211 | *s = c; | |
1212 | s++; | |
1213 | ||
1214 | c = id[ofs] & 0xff; | |
1215 | *s = c; | |
1216 | s++; | |
1217 | ||
1218 | ofs++; | |
1219 | len -= 2; | |
1220 | } | |
1221 | } | |
1222 | ||
0e949ff3 | 1223 | /** |
6a62a04d | 1224 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
1225 | * @id: IDENTIFY DEVICE results we will examine |
1226 | * @s: string into which data is output | |
1227 | * @ofs: offset into identify device page | |
1228 | * @len: length of string to return. must be an odd number. | |
1229 | * | |
6a62a04d | 1230 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
1231 | * trims trailing spaces and terminates the resulting string with |
1232 | * null. @len must be actual maximum length (even number) + 1. | |
1233 | * | |
1234 | * LOCKING: | |
1235 | * caller. | |
1236 | */ | |
6a62a04d TH |
1237 | void ata_id_c_string(const u16 *id, unsigned char *s, |
1238 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
1239 | { |
1240 | unsigned char *p; | |
1241 | ||
6a62a04d | 1242 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
1243 | |
1244 | p = s + strnlen(s, len - 1); | |
1245 | while (p > s && p[-1] == ' ') | |
1246 | p--; | |
1247 | *p = '\0'; | |
1248 | } | |
0baab86b | 1249 | |
db6f8759 TH |
1250 | static u64 ata_id_n_sectors(const u16 *id) |
1251 | { | |
1252 | if (ata_id_has_lba(id)) { | |
1253 | if (ata_id_has_lba48(id)) | |
1254 | return ata_id_u64(id, 100); | |
1255 | else | |
1256 | return ata_id_u32(id, 60); | |
1257 | } else { | |
1258 | if (ata_id_current_chs_valid(id)) | |
1259 | return ata_id_u32(id, 57); | |
1260 | else | |
1261 | return id[1] * id[3] * id[6]; | |
1262 | } | |
1263 | } | |
1264 | ||
a5987e0a | 1265 | u64 ata_tf_to_lba48(const struct ata_taskfile *tf) |
1e999736 AC |
1266 | { |
1267 | u64 sectors = 0; | |
1268 | ||
1269 | sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; | |
1270 | sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; | |
ba14a9c2 | 1271 | sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24; |
1e999736 AC |
1272 | sectors |= (tf->lbah & 0xff) << 16; |
1273 | sectors |= (tf->lbam & 0xff) << 8; | |
1274 | sectors |= (tf->lbal & 0xff); | |
1275 | ||
a5987e0a | 1276 | return sectors; |
1e999736 AC |
1277 | } |
1278 | ||
a5987e0a | 1279 | u64 ata_tf_to_lba(const struct ata_taskfile *tf) |
1e999736 AC |
1280 | { |
1281 | u64 sectors = 0; | |
1282 | ||
1283 | sectors |= (tf->device & 0x0f) << 24; | |
1284 | sectors |= (tf->lbah & 0xff) << 16; | |
1285 | sectors |= (tf->lbam & 0xff) << 8; | |
1286 | sectors |= (tf->lbal & 0xff); | |
1287 | ||
a5987e0a | 1288 | return sectors; |
1e999736 AC |
1289 | } |
1290 | ||
1291 | /** | |
c728a914 TH |
1292 | * ata_read_native_max_address - Read native max address |
1293 | * @dev: target device | |
1294 | * @max_sectors: out parameter for the result native max address | |
1e999736 | 1295 | * |
c728a914 TH |
1296 | * Perform an LBA48 or LBA28 native size query upon the device in |
1297 | * question. | |
1e999736 | 1298 | * |
c728a914 TH |
1299 | * RETURNS: |
1300 | * 0 on success, -EACCES if command is aborted by the drive. | |
1301 | * -EIO on other errors. | |
1e999736 | 1302 | */ |
c728a914 | 1303 | static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) |
1e999736 | 1304 | { |
c728a914 | 1305 | unsigned int err_mask; |
1e999736 | 1306 | struct ata_taskfile tf; |
c728a914 | 1307 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
1308 | |
1309 | ata_tf_init(dev, &tf); | |
1310 | ||
c728a914 | 1311 | /* always clear all address registers */ |
1e999736 | 1312 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1e999736 | 1313 | |
c728a914 TH |
1314 | if (lba48) { |
1315 | tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; | |
1316 | tf.flags |= ATA_TFLAG_LBA48; | |
1317 | } else | |
1318 | tf.command = ATA_CMD_READ_NATIVE_MAX; | |
1e999736 | 1319 | |
1e999736 | 1320 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 TH |
1321 | tf.device |= ATA_LBA; |
1322 | ||
2b789108 | 1323 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
c728a914 TH |
1324 | if (err_mask) { |
1325 | ata_dev_printk(dev, KERN_WARNING, "failed to read native " | |
1326 | "max address (err_mask=0x%x)\n", err_mask); | |
1327 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
1328 | return -EACCES; | |
1329 | return -EIO; | |
1330 | } | |
1e999736 | 1331 | |
c728a914 | 1332 | if (lba48) |
a5987e0a | 1333 | *max_sectors = ata_tf_to_lba48(&tf) + 1; |
c728a914 | 1334 | else |
a5987e0a | 1335 | *max_sectors = ata_tf_to_lba(&tf) + 1; |
2dcb407e | 1336 | if (dev->horkage & ATA_HORKAGE_HPA_SIZE) |
93328e11 | 1337 | (*max_sectors)--; |
c728a914 | 1338 | return 0; |
1e999736 AC |
1339 | } |
1340 | ||
1341 | /** | |
c728a914 TH |
1342 | * ata_set_max_sectors - Set max sectors |
1343 | * @dev: target device | |
6b38d1d1 | 1344 | * @new_sectors: new max sectors value to set for the device |
1e999736 | 1345 | * |
c728a914 TH |
1346 | * Set max sectors of @dev to @new_sectors. |
1347 | * | |
1348 | * RETURNS: | |
1349 | * 0 on success, -EACCES if command is aborted or denied (due to | |
1350 | * previous non-volatile SET_MAX) by the drive. -EIO on other | |
1351 | * errors. | |
1e999736 | 1352 | */ |
05027adc | 1353 | static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) |
1e999736 | 1354 | { |
c728a914 | 1355 | unsigned int err_mask; |
1e999736 | 1356 | struct ata_taskfile tf; |
c728a914 | 1357 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
1358 | |
1359 | new_sectors--; | |
1360 | ||
1361 | ata_tf_init(dev, &tf); | |
1362 | ||
1e999736 | 1363 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
c728a914 TH |
1364 | |
1365 | if (lba48) { | |
1366 | tf.command = ATA_CMD_SET_MAX_EXT; | |
1367 | tf.flags |= ATA_TFLAG_LBA48; | |
1368 | ||
1369 | tf.hob_lbal = (new_sectors >> 24) & 0xff; | |
1370 | tf.hob_lbam = (new_sectors >> 32) & 0xff; | |
1371 | tf.hob_lbah = (new_sectors >> 40) & 0xff; | |
1e582ba4 | 1372 | } else { |
c728a914 TH |
1373 | tf.command = ATA_CMD_SET_MAX; |
1374 | ||
1e582ba4 TH |
1375 | tf.device |= (new_sectors >> 24) & 0xf; |
1376 | } | |
1377 | ||
1e999736 | 1378 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 | 1379 | tf.device |= ATA_LBA; |
1e999736 AC |
1380 | |
1381 | tf.lbal = (new_sectors >> 0) & 0xff; | |
1382 | tf.lbam = (new_sectors >> 8) & 0xff; | |
1383 | tf.lbah = (new_sectors >> 16) & 0xff; | |
1e999736 | 1384 | |
2b789108 | 1385 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
c728a914 TH |
1386 | if (err_mask) { |
1387 | ata_dev_printk(dev, KERN_WARNING, "failed to set " | |
1388 | "max address (err_mask=0x%x)\n", err_mask); | |
1389 | if (err_mask == AC_ERR_DEV && | |
1390 | (tf.feature & (ATA_ABORTED | ATA_IDNF))) | |
1391 | return -EACCES; | |
1392 | return -EIO; | |
1393 | } | |
1394 | ||
c728a914 | 1395 | return 0; |
1e999736 AC |
1396 | } |
1397 | ||
1398 | /** | |
1399 | * ata_hpa_resize - Resize a device with an HPA set | |
1400 | * @dev: Device to resize | |
1401 | * | |
1402 | * Read the size of an LBA28 or LBA48 disk with HPA features and resize | |
1403 | * it if required to the full size of the media. The caller must check | |
1404 | * the drive has the HPA feature set enabled. | |
05027adc TH |
1405 | * |
1406 | * RETURNS: | |
1407 | * 0 on success, -errno on failure. | |
1e999736 | 1408 | */ |
05027adc | 1409 | static int ata_hpa_resize(struct ata_device *dev) |
1e999736 | 1410 | { |
05027adc TH |
1411 | struct ata_eh_context *ehc = &dev->link->eh_context; |
1412 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; | |
1413 | u64 sectors = ata_id_n_sectors(dev->id); | |
1414 | u64 native_sectors; | |
c728a914 | 1415 | int rc; |
a617c09f | 1416 | |
05027adc TH |
1417 | /* do we need to do it? */ |
1418 | if (dev->class != ATA_DEV_ATA || | |
1419 | !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || | |
1420 | (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) | |
c728a914 | 1421 | return 0; |
1e999736 | 1422 | |
05027adc TH |
1423 | /* read native max address */ |
1424 | rc = ata_read_native_max_address(dev, &native_sectors); | |
1425 | if (rc) { | |
dda7aba1 TH |
1426 | /* If device aborted the command or HPA isn't going to |
1427 | * be unlocked, skip HPA resizing. | |
05027adc | 1428 | */ |
dda7aba1 | 1429 | if (rc == -EACCES || !ata_ignore_hpa) { |
05027adc | 1430 | ata_dev_printk(dev, KERN_WARNING, "HPA support seems " |
dda7aba1 | 1431 | "broken, skipping HPA handling\n"); |
05027adc TH |
1432 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; |
1433 | ||
1434 | /* we can continue if device aborted the command */ | |
1435 | if (rc == -EACCES) | |
1436 | rc = 0; | |
1e999736 | 1437 | } |
37301a55 | 1438 | |
05027adc TH |
1439 | return rc; |
1440 | } | |
1441 | ||
1442 | /* nothing to do? */ | |
1443 | if (native_sectors <= sectors || !ata_ignore_hpa) { | |
1444 | if (!print_info || native_sectors == sectors) | |
1445 | return 0; | |
1446 | ||
1447 | if (native_sectors > sectors) | |
1448 | ata_dev_printk(dev, KERN_INFO, | |
1449 | "HPA detected: current %llu, native %llu\n", | |
1450 | (unsigned long long)sectors, | |
1451 | (unsigned long long)native_sectors); | |
1452 | else if (native_sectors < sectors) | |
1453 | ata_dev_printk(dev, KERN_WARNING, | |
1454 | "native sectors (%llu) is smaller than " | |
1455 | "sectors (%llu)\n", | |
1456 | (unsigned long long)native_sectors, | |
1457 | (unsigned long long)sectors); | |
1458 | return 0; | |
1459 | } | |
1460 | ||
1461 | /* let's unlock HPA */ | |
1462 | rc = ata_set_max_sectors(dev, native_sectors); | |
1463 | if (rc == -EACCES) { | |
1464 | /* if device aborted the command, skip HPA resizing */ | |
1465 | ata_dev_printk(dev, KERN_WARNING, "device aborted resize " | |
1466 | "(%llu -> %llu), skipping HPA handling\n", | |
1467 | (unsigned long long)sectors, | |
1468 | (unsigned long long)native_sectors); | |
1469 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; | |
1470 | return 0; | |
1471 | } else if (rc) | |
1472 | return rc; | |
1473 | ||
1474 | /* re-read IDENTIFY data */ | |
1475 | rc = ata_dev_reread_id(dev, 0); | |
1476 | if (rc) { | |
1477 | ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY " | |
1478 | "data after HPA resizing\n"); | |
1479 | return rc; | |
1480 | } | |
1481 | ||
1482 | if (print_info) { | |
1483 | u64 new_sectors = ata_id_n_sectors(dev->id); | |
1484 | ata_dev_printk(dev, KERN_INFO, | |
1485 | "HPA unlocked: %llu -> %llu, native %llu\n", | |
1486 | (unsigned long long)sectors, | |
1487 | (unsigned long long)new_sectors, | |
1488 | (unsigned long long)native_sectors); | |
1489 | } | |
1490 | ||
1491 | return 0; | |
1e999736 AC |
1492 | } |
1493 | ||
1da177e4 LT |
1494 | /** |
1495 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 1496 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 1497 | * |
0bd3300a TH |
1498 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
1499 | * page. | |
1da177e4 LT |
1500 | * |
1501 | * LOCKING: | |
1502 | * caller. | |
1503 | */ | |
1504 | ||
0bd3300a | 1505 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
1506 | { |
1507 | DPRINTK("49==0x%04x " | |
1508 | "53==0x%04x " | |
1509 | "63==0x%04x " | |
1510 | "64==0x%04x " | |
1511 | "75==0x%04x \n", | |
0bd3300a TH |
1512 | id[49], |
1513 | id[53], | |
1514 | id[63], | |
1515 | id[64], | |
1516 | id[75]); | |
1da177e4 LT |
1517 | DPRINTK("80==0x%04x " |
1518 | "81==0x%04x " | |
1519 | "82==0x%04x " | |
1520 | "83==0x%04x " | |
1521 | "84==0x%04x \n", | |
0bd3300a TH |
1522 | id[80], |
1523 | id[81], | |
1524 | id[82], | |
1525 | id[83], | |
1526 | id[84]); | |
1da177e4 LT |
1527 | DPRINTK("88==0x%04x " |
1528 | "93==0x%04x\n", | |
0bd3300a TH |
1529 | id[88], |
1530 | id[93]); | |
1da177e4 LT |
1531 | } |
1532 | ||
cb95d562 TH |
1533 | /** |
1534 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
1535 | * @id: IDENTIFY data to compute xfer mask from | |
1536 | * | |
1537 | * Compute the xfermask for this device. This is not as trivial | |
1538 | * as it seems if we must consider early devices correctly. | |
1539 | * | |
1540 | * FIXME: pre IDE drive timing (do we care ?). | |
1541 | * | |
1542 | * LOCKING: | |
1543 | * None. | |
1544 | * | |
1545 | * RETURNS: | |
1546 | * Computed xfermask | |
1547 | */ | |
7dc951ae | 1548 | unsigned long ata_id_xfermask(const u16 *id) |
cb95d562 | 1549 | { |
7dc951ae | 1550 | unsigned long pio_mask, mwdma_mask, udma_mask; |
cb95d562 TH |
1551 | |
1552 | /* Usual case. Word 53 indicates word 64 is valid */ | |
1553 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
1554 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
1555 | pio_mask <<= 3; | |
1556 | pio_mask |= 0x7; | |
1557 | } else { | |
1558 | /* If word 64 isn't valid then Word 51 high byte holds | |
1559 | * the PIO timing number for the maximum. Turn it into | |
1560 | * a mask. | |
1561 | */ | |
7a0f1c8a | 1562 | u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
46767aeb | 1563 | if (mode < 5) /* Valid PIO range */ |
2dcb407e | 1564 | pio_mask = (2 << mode) - 1; |
46767aeb AC |
1565 | else |
1566 | pio_mask = 1; | |
cb95d562 TH |
1567 | |
1568 | /* But wait.. there's more. Design your standards by | |
1569 | * committee and you too can get a free iordy field to | |
1570 | * process. However its the speeds not the modes that | |
1571 | * are supported... Note drivers using the timing API | |
1572 | * will get this right anyway | |
1573 | */ | |
1574 | } | |
1575 | ||
1576 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
fb21f0d0 | 1577 | |
b352e57d AC |
1578 | if (ata_id_is_cfa(id)) { |
1579 | /* | |
1580 | * Process compact flash extended modes | |
1581 | */ | |
1582 | int pio = id[163] & 0x7; | |
1583 | int dma = (id[163] >> 3) & 7; | |
1584 | ||
1585 | if (pio) | |
1586 | pio_mask |= (1 << 5); | |
1587 | if (pio > 1) | |
1588 | pio_mask |= (1 << 6); | |
1589 | if (dma) | |
1590 | mwdma_mask |= (1 << 3); | |
1591 | if (dma > 1) | |
1592 | mwdma_mask |= (1 << 4); | |
1593 | } | |
1594 | ||
fb21f0d0 TH |
1595 | udma_mask = 0; |
1596 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
1597 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
cb95d562 TH |
1598 | |
1599 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
1600 | } | |
1601 | ||
86e45b6b | 1602 | /** |
442eacc3 | 1603 | * ata_pio_queue_task - Queue port_task |
86e45b6b | 1604 | * @ap: The ata_port to queue port_task for |
65f27f38 | 1605 | * @data: data for @fn to use |
341c2c95 | 1606 | * @delay: delay time in msecs for workqueue function |
86e45b6b TH |
1607 | * |
1608 | * Schedule @fn(@data) for execution after @delay jiffies using | |
1609 | * port_task. There is one port_task per port and it's the | |
1610 | * user(low level driver)'s responsibility to make sure that only | |
1611 | * one task is active at any given time. | |
1612 | * | |
1613 | * libata core layer takes care of synchronization between | |
442eacc3 | 1614 | * port_task and EH. ata_pio_queue_task() may be ignored for EH |
86e45b6b TH |
1615 | * synchronization. |
1616 | * | |
1617 | * LOCKING: | |
1618 | * Inherited from caller. | |
1619 | */ | |
624d5c51 | 1620 | void ata_pio_queue_task(struct ata_port *ap, void *data, unsigned long delay) |
86e45b6b | 1621 | { |
65f27f38 | 1622 | ap->port_task_data = data; |
86e45b6b | 1623 | |
45a66c1c | 1624 | /* may fail if ata_port_flush_task() in progress */ |
341c2c95 | 1625 | queue_delayed_work(ata_wq, &ap->port_task, msecs_to_jiffies(delay)); |
86e45b6b TH |
1626 | } |
1627 | ||
1628 | /** | |
1629 | * ata_port_flush_task - Flush port_task | |
1630 | * @ap: The ata_port to flush port_task for | |
1631 | * | |
1632 | * After this function completes, port_task is guranteed not to | |
1633 | * be running or scheduled. | |
1634 | * | |
1635 | * LOCKING: | |
1636 | * Kernel thread context (may sleep) | |
1637 | */ | |
1638 | void ata_port_flush_task(struct ata_port *ap) | |
1639 | { | |
86e45b6b TH |
1640 | DPRINTK("ENTER\n"); |
1641 | ||
45a66c1c | 1642 | cancel_rearming_delayed_work(&ap->port_task); |
86e45b6b | 1643 | |
0dd4b21f | 1644 | if (ata_msg_ctl(ap)) |
7f5e4e8d | 1645 | ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __func__); |
86e45b6b TH |
1646 | } |
1647 | ||
7102d230 | 1648 | static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 1649 | { |
77853bf2 | 1650 | struct completion *waiting = qc->private_data; |
a2a7a662 | 1651 | |
a2a7a662 | 1652 | complete(waiting); |
a2a7a662 TH |
1653 | } |
1654 | ||
1655 | /** | |
2432697b | 1656 | * ata_exec_internal_sg - execute libata internal command |
a2a7a662 TH |
1657 | * @dev: Device to which the command is sent |
1658 | * @tf: Taskfile registers for the command and the result | |
d69cf37d | 1659 | * @cdb: CDB for packet command |
a2a7a662 | 1660 | * @dma_dir: Data tranfer direction of the command |
5c1ad8b3 | 1661 | * @sgl: sg list for the data buffer of the command |
2432697b | 1662 | * @n_elem: Number of sg entries |
2b789108 | 1663 | * @timeout: Timeout in msecs (0 for default) |
a2a7a662 TH |
1664 | * |
1665 | * Executes libata internal command with timeout. @tf contains | |
1666 | * command on entry and result on return. Timeout and error | |
1667 | * conditions are reported via return value. No recovery action | |
1668 | * is taken after a command times out. It's caller's duty to | |
1669 | * clean up after timeout. | |
1670 | * | |
1671 | * LOCKING: | |
1672 | * None. Should be called with kernel context, might sleep. | |
551e8889 TH |
1673 | * |
1674 | * RETURNS: | |
1675 | * Zero on success, AC_ERR_* mask on failure | |
a2a7a662 | 1676 | */ |
2432697b TH |
1677 | unsigned ata_exec_internal_sg(struct ata_device *dev, |
1678 | struct ata_taskfile *tf, const u8 *cdb, | |
87260216 | 1679 | int dma_dir, struct scatterlist *sgl, |
2b789108 | 1680 | unsigned int n_elem, unsigned long timeout) |
a2a7a662 | 1681 | { |
9af5c9c9 TH |
1682 | struct ata_link *link = dev->link; |
1683 | struct ata_port *ap = link->ap; | |
a2a7a662 | 1684 | u8 command = tf->command; |
87fbc5a0 | 1685 | int auto_timeout = 0; |
a2a7a662 | 1686 | struct ata_queued_cmd *qc; |
2ab7db1f | 1687 | unsigned int tag, preempted_tag; |
dedaf2b0 | 1688 | u32 preempted_sactive, preempted_qc_active; |
da917d69 | 1689 | int preempted_nr_active_links; |
60be6b9a | 1690 | DECLARE_COMPLETION_ONSTACK(wait); |
a2a7a662 | 1691 | unsigned long flags; |
77853bf2 | 1692 | unsigned int err_mask; |
d95a717f | 1693 | int rc; |
a2a7a662 | 1694 | |
ba6a1308 | 1695 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 | 1696 | |
e3180499 | 1697 | /* no internal command while frozen */ |
b51e9e5d | 1698 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
ba6a1308 | 1699 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1700 | return AC_ERR_SYSTEM; |
1701 | } | |
1702 | ||
2ab7db1f | 1703 | /* initialize internal qc */ |
a2a7a662 | 1704 | |
2ab7db1f TH |
1705 | /* XXX: Tag 0 is used for drivers with legacy EH as some |
1706 | * drivers choke if any other tag is given. This breaks | |
1707 | * ata_tag_internal() test for those drivers. Don't use new | |
1708 | * EH stuff without converting to it. | |
1709 | */ | |
1710 | if (ap->ops->error_handler) | |
1711 | tag = ATA_TAG_INTERNAL; | |
1712 | else | |
1713 | tag = 0; | |
1714 | ||
8a8bc223 TH |
1715 | if (test_and_set_bit(tag, &ap->qc_allocated)) |
1716 | BUG(); | |
f69499f4 | 1717 | qc = __ata_qc_from_tag(ap, tag); |
2ab7db1f TH |
1718 | |
1719 | qc->tag = tag; | |
1720 | qc->scsicmd = NULL; | |
1721 | qc->ap = ap; | |
1722 | qc->dev = dev; | |
1723 | ata_qc_reinit(qc); | |
1724 | ||
9af5c9c9 TH |
1725 | preempted_tag = link->active_tag; |
1726 | preempted_sactive = link->sactive; | |
dedaf2b0 | 1727 | preempted_qc_active = ap->qc_active; |
da917d69 | 1728 | preempted_nr_active_links = ap->nr_active_links; |
9af5c9c9 TH |
1729 | link->active_tag = ATA_TAG_POISON; |
1730 | link->sactive = 0; | |
dedaf2b0 | 1731 | ap->qc_active = 0; |
da917d69 | 1732 | ap->nr_active_links = 0; |
2ab7db1f TH |
1733 | |
1734 | /* prepare & issue qc */ | |
a2a7a662 | 1735 | qc->tf = *tf; |
d69cf37d TH |
1736 | if (cdb) |
1737 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); | |
e61e0672 | 1738 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
a2a7a662 TH |
1739 | qc->dma_dir = dma_dir; |
1740 | if (dma_dir != DMA_NONE) { | |
2432697b | 1741 | unsigned int i, buflen = 0; |
87260216 | 1742 | struct scatterlist *sg; |
2432697b | 1743 | |
87260216 JA |
1744 | for_each_sg(sgl, sg, n_elem, i) |
1745 | buflen += sg->length; | |
2432697b | 1746 | |
87260216 | 1747 | ata_sg_init(qc, sgl, n_elem); |
49c80429 | 1748 | qc->nbytes = buflen; |
a2a7a662 TH |
1749 | } |
1750 | ||
77853bf2 | 1751 | qc->private_data = &wait; |
a2a7a662 TH |
1752 | qc->complete_fn = ata_qc_complete_internal; |
1753 | ||
8e0e694a | 1754 | ata_qc_issue(qc); |
a2a7a662 | 1755 | |
ba6a1308 | 1756 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 | 1757 | |
87fbc5a0 TH |
1758 | if (!timeout) { |
1759 | if (ata_probe_timeout) | |
1760 | timeout = ata_probe_timeout * 1000; | |
1761 | else { | |
1762 | timeout = ata_internal_cmd_timeout(dev, command); | |
1763 | auto_timeout = 1; | |
1764 | } | |
1765 | } | |
2b789108 TH |
1766 | |
1767 | rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); | |
d95a717f TH |
1768 | |
1769 | ata_port_flush_task(ap); | |
41ade50c | 1770 | |
d95a717f | 1771 | if (!rc) { |
ba6a1308 | 1772 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 TH |
1773 | |
1774 | /* We're racing with irq here. If we lose, the | |
1775 | * following test prevents us from completing the qc | |
d95a717f TH |
1776 | * twice. If we win, the port is frozen and will be |
1777 | * cleaned up by ->post_internal_cmd(). | |
a2a7a662 | 1778 | */ |
77853bf2 | 1779 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
d95a717f TH |
1780 | qc->err_mask |= AC_ERR_TIMEOUT; |
1781 | ||
1782 | if (ap->ops->error_handler) | |
1783 | ata_port_freeze(ap); | |
1784 | else | |
1785 | ata_qc_complete(qc); | |
f15a1daf | 1786 | |
0dd4b21f BP |
1787 | if (ata_msg_warn(ap)) |
1788 | ata_dev_printk(dev, KERN_WARNING, | |
88574551 | 1789 | "qc timeout (cmd 0x%x)\n", command); |
a2a7a662 TH |
1790 | } |
1791 | ||
ba6a1308 | 1792 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 TH |
1793 | } |
1794 | ||
d95a717f TH |
1795 | /* do post_internal_cmd */ |
1796 | if (ap->ops->post_internal_cmd) | |
1797 | ap->ops->post_internal_cmd(qc); | |
1798 | ||
a51d644a TH |
1799 | /* perform minimal error analysis */ |
1800 | if (qc->flags & ATA_QCFLAG_FAILED) { | |
1801 | if (qc->result_tf.command & (ATA_ERR | ATA_DF)) | |
1802 | qc->err_mask |= AC_ERR_DEV; | |
1803 | ||
1804 | if (!qc->err_mask) | |
1805 | qc->err_mask |= AC_ERR_OTHER; | |
1806 | ||
1807 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1808 | qc->err_mask &= ~AC_ERR_OTHER; | |
d95a717f TH |
1809 | } |
1810 | ||
15869303 | 1811 | /* finish up */ |
ba6a1308 | 1812 | spin_lock_irqsave(ap->lock, flags); |
15869303 | 1813 | |
e61e0672 | 1814 | *tf = qc->result_tf; |
77853bf2 TH |
1815 | err_mask = qc->err_mask; |
1816 | ||
1817 | ata_qc_free(qc); | |
9af5c9c9 TH |
1818 | link->active_tag = preempted_tag; |
1819 | link->sactive = preempted_sactive; | |
dedaf2b0 | 1820 | ap->qc_active = preempted_qc_active; |
da917d69 | 1821 | ap->nr_active_links = preempted_nr_active_links; |
77853bf2 | 1822 | |
1f7dd3e9 TH |
1823 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
1824 | * Until those drivers are fixed, we detect the condition | |
1825 | * here, fail the command with AC_ERR_SYSTEM and reenable the | |
1826 | * port. | |
1827 | * | |
1828 | * Note that this doesn't change any behavior as internal | |
1829 | * command failure results in disabling the device in the | |
1830 | * higher layer for LLDDs without new reset/EH callbacks. | |
1831 | * | |
1832 | * Kill the following code as soon as those drivers are fixed. | |
1833 | */ | |
198e0fed | 1834 | if (ap->flags & ATA_FLAG_DISABLED) { |
1f7dd3e9 TH |
1835 | err_mask |= AC_ERR_SYSTEM; |
1836 | ata_port_probe(ap); | |
1837 | } | |
1838 | ||
ba6a1308 | 1839 | spin_unlock_irqrestore(ap->lock, flags); |
15869303 | 1840 | |
87fbc5a0 TH |
1841 | if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout) |
1842 | ata_internal_cmd_timed_out(dev, command); | |
1843 | ||
77853bf2 | 1844 | return err_mask; |
a2a7a662 TH |
1845 | } |
1846 | ||
2432697b | 1847 | /** |
33480a0e | 1848 | * ata_exec_internal - execute libata internal command |
2432697b TH |
1849 | * @dev: Device to which the command is sent |
1850 | * @tf: Taskfile registers for the command and the result | |
1851 | * @cdb: CDB for packet command | |
1852 | * @dma_dir: Data tranfer direction of the command | |
1853 | * @buf: Data buffer of the command | |
1854 | * @buflen: Length of data buffer | |
2b789108 | 1855 | * @timeout: Timeout in msecs (0 for default) |
2432697b TH |
1856 | * |
1857 | * Wrapper around ata_exec_internal_sg() which takes simple | |
1858 | * buffer instead of sg list. | |
1859 | * | |
1860 | * LOCKING: | |
1861 | * None. Should be called with kernel context, might sleep. | |
1862 | * | |
1863 | * RETURNS: | |
1864 | * Zero on success, AC_ERR_* mask on failure | |
1865 | */ | |
1866 | unsigned ata_exec_internal(struct ata_device *dev, | |
1867 | struct ata_taskfile *tf, const u8 *cdb, | |
2b789108 TH |
1868 | int dma_dir, void *buf, unsigned int buflen, |
1869 | unsigned long timeout) | |
2432697b | 1870 | { |
33480a0e TH |
1871 | struct scatterlist *psg = NULL, sg; |
1872 | unsigned int n_elem = 0; | |
2432697b | 1873 | |
33480a0e TH |
1874 | if (dma_dir != DMA_NONE) { |
1875 | WARN_ON(!buf); | |
1876 | sg_init_one(&sg, buf, buflen); | |
1877 | psg = &sg; | |
1878 | n_elem++; | |
1879 | } | |
2432697b | 1880 | |
2b789108 TH |
1881 | return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, |
1882 | timeout); | |
2432697b TH |
1883 | } |
1884 | ||
977e6b9f TH |
1885 | /** |
1886 | * ata_do_simple_cmd - execute simple internal command | |
1887 | * @dev: Device to which the command is sent | |
1888 | * @cmd: Opcode to execute | |
1889 | * | |
1890 | * Execute a 'simple' command, that only consists of the opcode | |
1891 | * 'cmd' itself, without filling any other registers | |
1892 | * | |
1893 | * LOCKING: | |
1894 | * Kernel thread context (may sleep). | |
1895 | * | |
1896 | * RETURNS: | |
1897 | * Zero on success, AC_ERR_* mask on failure | |
e58eb583 | 1898 | */ |
77b08fb5 | 1899 | unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
e58eb583 TH |
1900 | { |
1901 | struct ata_taskfile tf; | |
e58eb583 TH |
1902 | |
1903 | ata_tf_init(dev, &tf); | |
1904 | ||
1905 | tf.command = cmd; | |
1906 | tf.flags |= ATA_TFLAG_DEVICE; | |
1907 | tf.protocol = ATA_PROT_NODATA; | |
1908 | ||
2b789108 | 1909 | return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
e58eb583 TH |
1910 | } |
1911 | ||
1bc4ccff AC |
1912 | /** |
1913 | * ata_pio_need_iordy - check if iordy needed | |
1914 | * @adev: ATA device | |
1915 | * | |
1916 | * Check if the current speed of the device requires IORDY. Used | |
1917 | * by various controllers for chip configuration. | |
1918 | */ | |
a617c09f | 1919 | |
1bc4ccff AC |
1920 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
1921 | { | |
432729f0 AC |
1922 | /* Controller doesn't support IORDY. Probably a pointless check |
1923 | as the caller should know this */ | |
9af5c9c9 | 1924 | if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) |
1bc4ccff | 1925 | return 0; |
432729f0 AC |
1926 | /* PIO3 and higher it is mandatory */ |
1927 | if (adev->pio_mode > XFER_PIO_2) | |
1928 | return 1; | |
1929 | /* We turn it on when possible */ | |
1930 | if (ata_id_has_iordy(adev->id)) | |
1bc4ccff | 1931 | return 1; |
432729f0 AC |
1932 | return 0; |
1933 | } | |
2e9edbf8 | 1934 | |
432729f0 AC |
1935 | /** |
1936 | * ata_pio_mask_no_iordy - Return the non IORDY mask | |
1937 | * @adev: ATA device | |
1938 | * | |
1939 | * Compute the highest mode possible if we are not using iordy. Return | |
1940 | * -1 if no iordy mode is available. | |
1941 | */ | |
a617c09f | 1942 | |
432729f0 AC |
1943 | static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) |
1944 | { | |
1bc4ccff | 1945 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
1bc4ccff | 1946 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
432729f0 | 1947 | u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
1bc4ccff AC |
1948 | /* Is the speed faster than the drive allows non IORDY ? */ |
1949 | if (pio) { | |
1950 | /* This is cycle times not frequency - watch the logic! */ | |
1951 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
432729f0 AC |
1952 | return 3 << ATA_SHIFT_PIO; |
1953 | return 7 << ATA_SHIFT_PIO; | |
1bc4ccff AC |
1954 | } |
1955 | } | |
432729f0 | 1956 | return 3 << ATA_SHIFT_PIO; |
1bc4ccff AC |
1957 | } |
1958 | ||
963e4975 AC |
1959 | /** |
1960 | * ata_do_dev_read_id - default ID read method | |
1961 | * @dev: device | |
1962 | * @tf: proposed taskfile | |
1963 | * @id: data buffer | |
1964 | * | |
1965 | * Issue the identify taskfile and hand back the buffer containing | |
1966 | * identify data. For some RAID controllers and for pre ATA devices | |
1967 | * this function is wrapped or replaced by the driver | |
1968 | */ | |
1969 | unsigned int ata_do_dev_read_id(struct ata_device *dev, | |
1970 | struct ata_taskfile *tf, u16 *id) | |
1971 | { | |
1972 | return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE, | |
1973 | id, sizeof(id[0]) * ATA_ID_WORDS, 0); | |
1974 | } | |
1975 | ||
1da177e4 | 1976 | /** |
49016aca | 1977 | * ata_dev_read_id - Read ID data from the specified device |
49016aca TH |
1978 | * @dev: target device |
1979 | * @p_class: pointer to class of the target device (may be changed) | |
bff04647 | 1980 | * @flags: ATA_READID_* flags |
fe635c7e | 1981 | * @id: buffer to read IDENTIFY data into |
1da177e4 | 1982 | * |
49016aca TH |
1983 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
1984 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
aec5c3c1 TH |
1985 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
1986 | * for pre-ATA4 drives. | |
1da177e4 | 1987 | * |
50a99018 | 1988 | * FIXME: ATA_CMD_ID_ATA is optional for early drives and right |
2dcb407e | 1989 | * now we abort if we hit that case. |
50a99018 | 1990 | * |
1da177e4 | 1991 | * LOCKING: |
49016aca TH |
1992 | * Kernel thread context (may sleep) |
1993 | * | |
1994 | * RETURNS: | |
1995 | * 0 on success, -errno otherwise. | |
1da177e4 | 1996 | */ |
a9beec95 | 1997 | int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, |
bff04647 | 1998 | unsigned int flags, u16 *id) |
1da177e4 | 1999 | { |
9af5c9c9 | 2000 | struct ata_port *ap = dev->link->ap; |
49016aca | 2001 | unsigned int class = *p_class; |
a0123703 | 2002 | struct ata_taskfile tf; |
49016aca TH |
2003 | unsigned int err_mask = 0; |
2004 | const char *reason; | |
54936f8b | 2005 | int may_fallback = 1, tried_spinup = 0; |
49016aca | 2006 | int rc; |
1da177e4 | 2007 | |
0dd4b21f | 2008 | if (ata_msg_ctl(ap)) |
7f5e4e8d | 2009 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); |
1da177e4 | 2010 | |
963e4975 | 2011 | retry: |
3373efd8 | 2012 | ata_tf_init(dev, &tf); |
a0123703 | 2013 | |
49016aca TH |
2014 | switch (class) { |
2015 | case ATA_DEV_ATA: | |
a0123703 | 2016 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
2017 | break; |
2018 | case ATA_DEV_ATAPI: | |
a0123703 | 2019 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
2020 | break; |
2021 | default: | |
2022 | rc = -ENODEV; | |
2023 | reason = "unsupported class"; | |
2024 | goto err_out; | |
1da177e4 LT |
2025 | } |
2026 | ||
a0123703 | 2027 | tf.protocol = ATA_PROT_PIO; |
81afe893 TH |
2028 | |
2029 | /* Some devices choke if TF registers contain garbage. Make | |
2030 | * sure those are properly initialized. | |
2031 | */ | |
2032 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2033 | ||
2034 | /* Device presence detection is unreliable on some | |
2035 | * controllers. Always poll IDENTIFY if available. | |
2036 | */ | |
2037 | tf.flags |= ATA_TFLAG_POLLING; | |
1da177e4 | 2038 | |
963e4975 AC |
2039 | if (ap->ops->read_id) |
2040 | err_mask = ap->ops->read_id(dev, &tf, id); | |
2041 | else | |
2042 | err_mask = ata_do_dev_read_id(dev, &tf, id); | |
2043 | ||
a0123703 | 2044 | if (err_mask) { |
800b3996 | 2045 | if (err_mask & AC_ERR_NODEV_HINT) { |
1ffc151f TH |
2046 | ata_dev_printk(dev, KERN_DEBUG, |
2047 | "NODEV after polling detection\n"); | |
55a8e2c8 TH |
2048 | return -ENOENT; |
2049 | } | |
2050 | ||
1ffc151f TH |
2051 | if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { |
2052 | /* Device or controller might have reported | |
2053 | * the wrong device class. Give a shot at the | |
2054 | * other IDENTIFY if the current one is | |
2055 | * aborted by the device. | |
2056 | */ | |
2057 | if (may_fallback) { | |
2058 | may_fallback = 0; | |
2059 | ||
2060 | if (class == ATA_DEV_ATA) | |
2061 | class = ATA_DEV_ATAPI; | |
2062 | else | |
2063 | class = ATA_DEV_ATA; | |
2064 | goto retry; | |
2065 | } | |
2066 | ||
2067 | /* Control reaches here iff the device aborted | |
2068 | * both flavors of IDENTIFYs which happens | |
2069 | * sometimes with phantom devices. | |
2070 | */ | |
2071 | ata_dev_printk(dev, KERN_DEBUG, | |
2072 | "both IDENTIFYs aborted, assuming NODEV\n"); | |
2073 | return -ENOENT; | |
54936f8b TH |
2074 | } |
2075 | ||
49016aca TH |
2076 | rc = -EIO; |
2077 | reason = "I/O error"; | |
1da177e4 LT |
2078 | goto err_out; |
2079 | } | |
2080 | ||
54936f8b TH |
2081 | /* Falling back doesn't make sense if ID data was read |
2082 | * successfully at least once. | |
2083 | */ | |
2084 | may_fallback = 0; | |
2085 | ||
49016aca | 2086 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 | 2087 | |
49016aca | 2088 | /* sanity check */ |
a4f5749b | 2089 | rc = -EINVAL; |
6070068b | 2090 | reason = "device reports invalid type"; |
a4f5749b TH |
2091 | |
2092 | if (class == ATA_DEV_ATA) { | |
2093 | if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) | |
2094 | goto err_out; | |
2095 | } else { | |
2096 | if (ata_id_is_ata(id)) | |
2097 | goto err_out; | |
49016aca TH |
2098 | } |
2099 | ||
169439c2 ML |
2100 | if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { |
2101 | tried_spinup = 1; | |
2102 | /* | |
2103 | * Drive powered-up in standby mode, and requires a specific | |
2104 | * SET_FEATURES spin-up subcommand before it will accept | |
2105 | * anything other than the original IDENTIFY command. | |
2106 | */ | |
218f3d30 | 2107 | err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); |
fb0582f9 | 2108 | if (err_mask && id[2] != 0x738c) { |
169439c2 ML |
2109 | rc = -EIO; |
2110 | reason = "SPINUP failed"; | |
2111 | goto err_out; | |
2112 | } | |
2113 | /* | |
2114 | * If the drive initially returned incomplete IDENTIFY info, | |
2115 | * we now must reissue the IDENTIFY command. | |
2116 | */ | |
2117 | if (id[2] == 0x37c8) | |
2118 | goto retry; | |
2119 | } | |
2120 | ||
bff04647 | 2121 | if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { |
49016aca TH |
2122 | /* |
2123 | * The exact sequence expected by certain pre-ATA4 drives is: | |
2124 | * SRST RESET | |
50a99018 AC |
2125 | * IDENTIFY (optional in early ATA) |
2126 | * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) | |
49016aca TH |
2127 | * anything else.. |
2128 | * Some drives were very specific about that exact sequence. | |
50a99018 AC |
2129 | * |
2130 | * Note that ATA4 says lba is mandatory so the second check | |
2131 | * shoud never trigger. | |
49016aca TH |
2132 | */ |
2133 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
3373efd8 | 2134 | err_mask = ata_dev_init_params(dev, id[3], id[6]); |
49016aca TH |
2135 | if (err_mask) { |
2136 | rc = -EIO; | |
2137 | reason = "INIT_DEV_PARAMS failed"; | |
2138 | goto err_out; | |
2139 | } | |
2140 | ||
2141 | /* current CHS translation info (id[53-58]) might be | |
2142 | * changed. reread the identify device info. | |
2143 | */ | |
bff04647 | 2144 | flags &= ~ATA_READID_POSTRESET; |
49016aca TH |
2145 | goto retry; |
2146 | } | |
2147 | } | |
2148 | ||
2149 | *p_class = class; | |
fe635c7e | 2150 | |
49016aca TH |
2151 | return 0; |
2152 | ||
2153 | err_out: | |
88574551 | 2154 | if (ata_msg_warn(ap)) |
0dd4b21f | 2155 | ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
88574551 | 2156 | "(%s, err_mask=0x%x)\n", reason, err_mask); |
49016aca TH |
2157 | return rc; |
2158 | } | |
2159 | ||
3373efd8 | 2160 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
4b2f3ede | 2161 | { |
9af5c9c9 | 2162 | struct ata_port *ap = dev->link->ap; |
9ce8e307 JA |
2163 | |
2164 | if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK) | |
2165 | return 0; | |
2166 | ||
9af5c9c9 | 2167 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); |
4b2f3ede TH |
2168 | } |
2169 | ||
a6e6ce8e TH |
2170 | static void ata_dev_config_ncq(struct ata_device *dev, |
2171 | char *desc, size_t desc_sz) | |
2172 | { | |
9af5c9c9 | 2173 | struct ata_port *ap = dev->link->ap; |
a6e6ce8e TH |
2174 | int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); |
2175 | ||
2176 | if (!ata_id_has_ncq(dev->id)) { | |
2177 | desc[0] = '\0'; | |
2178 | return; | |
2179 | } | |
75683fe7 | 2180 | if (dev->horkage & ATA_HORKAGE_NONCQ) { |
6919a0a6 AC |
2181 | snprintf(desc, desc_sz, "NCQ (not used)"); |
2182 | return; | |
2183 | } | |
a6e6ce8e | 2184 | if (ap->flags & ATA_FLAG_NCQ) { |
cca3974e | 2185 | hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
a6e6ce8e TH |
2186 | dev->flags |= ATA_DFLAG_NCQ; |
2187 | } | |
2188 | ||
2189 | if (hdepth >= ddepth) | |
2190 | snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); | |
2191 | else | |
2192 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); | |
2193 | } | |
2194 | ||
49016aca | 2195 | /** |
ffeae418 | 2196 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
ffeae418 TH |
2197 | * @dev: Target device to configure |
2198 | * | |
2199 | * Configure @dev according to @dev->id. Generic and low-level | |
2200 | * driver specific fixups are also applied. | |
49016aca TH |
2201 | * |
2202 | * LOCKING: | |
ffeae418 TH |
2203 | * Kernel thread context (may sleep) |
2204 | * | |
2205 | * RETURNS: | |
2206 | * 0 on success, -errno otherwise | |
49016aca | 2207 | */ |
efdaedc4 | 2208 | int ata_dev_configure(struct ata_device *dev) |
49016aca | 2209 | { |
9af5c9c9 TH |
2210 | struct ata_port *ap = dev->link->ap; |
2211 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
6746544c | 2212 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
1148c3a7 | 2213 | const u16 *id = dev->id; |
7dc951ae | 2214 | unsigned long xfer_mask; |
b352e57d | 2215 | char revbuf[7]; /* XYZ-99\0 */ |
3f64f565 EM |
2216 | char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
2217 | char modelbuf[ATA_ID_PROD_LEN+1]; | |
e6d902a3 | 2218 | int rc; |
49016aca | 2219 | |
0dd4b21f | 2220 | if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
44877b4e | 2221 | ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", |
7f5e4e8d | 2222 | __func__); |
ffeae418 | 2223 | return 0; |
49016aca TH |
2224 | } |
2225 | ||
0dd4b21f | 2226 | if (ata_msg_probe(ap)) |
7f5e4e8d | 2227 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); |
1da177e4 | 2228 | |
75683fe7 TH |
2229 | /* set horkage */ |
2230 | dev->horkage |= ata_dev_blacklisted(dev); | |
33267325 | 2231 | ata_force_horkage(dev); |
75683fe7 | 2232 | |
50af2fa1 TH |
2233 | if (dev->horkage & ATA_HORKAGE_DISABLE) { |
2234 | ata_dev_printk(dev, KERN_INFO, | |
2235 | "unsupported device, disabling\n"); | |
2236 | ata_dev_disable(dev); | |
2237 | return 0; | |
2238 | } | |
2239 | ||
2486fa56 TH |
2240 | if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) && |
2241 | dev->class == ATA_DEV_ATAPI) { | |
2242 | ata_dev_printk(dev, KERN_WARNING, | |
2243 | "WARNING: ATAPI is %s, device ignored.\n", | |
2244 | atapi_enabled ? "not supported with this driver" | |
2245 | : "disabled"); | |
2246 | ata_dev_disable(dev); | |
2247 | return 0; | |
2248 | } | |
2249 | ||
6746544c TH |
2250 | /* let ACPI work its magic */ |
2251 | rc = ata_acpi_on_devcfg(dev); | |
2252 | if (rc) | |
2253 | return rc; | |
08573a86 | 2254 | |
05027adc TH |
2255 | /* massage HPA, do it early as it might change IDENTIFY data */ |
2256 | rc = ata_hpa_resize(dev); | |
2257 | if (rc) | |
2258 | return rc; | |
2259 | ||
c39f5ebe | 2260 | /* print device capabilities */ |
0dd4b21f | 2261 | if (ata_msg_probe(ap)) |
88574551 TH |
2262 | ata_dev_printk(dev, KERN_DEBUG, |
2263 | "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " | |
2264 | "85:%04x 86:%04x 87:%04x 88:%04x\n", | |
7f5e4e8d | 2265 | __func__, |
f15a1daf TH |
2266 | id[49], id[82], id[83], id[84], |
2267 | id[85], id[86], id[87], id[88]); | |
c39f5ebe | 2268 | |
208a9933 | 2269 | /* initialize to-be-configured parameters */ |
ea1dd4e1 | 2270 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
208a9933 TH |
2271 | dev->max_sectors = 0; |
2272 | dev->cdb_len = 0; | |
2273 | dev->n_sectors = 0; | |
2274 | dev->cylinders = 0; | |
2275 | dev->heads = 0; | |
2276 | dev->sectors = 0; | |
2277 | ||
1da177e4 LT |
2278 | /* |
2279 | * common ATA, ATAPI feature tests | |
2280 | */ | |
2281 | ||
ff8854b2 | 2282 | /* find max transfer mode; for printk only */ |
1148c3a7 | 2283 | xfer_mask = ata_id_xfermask(id); |
1da177e4 | 2284 | |
0dd4b21f BP |
2285 | if (ata_msg_probe(ap)) |
2286 | ata_dump_id(id); | |
1da177e4 | 2287 | |
ef143d57 AL |
2288 | /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
2289 | ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, | |
2290 | sizeof(fwrevbuf)); | |
2291 | ||
2292 | ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, | |
2293 | sizeof(modelbuf)); | |
2294 | ||
1da177e4 LT |
2295 | /* ATA-specific feature tests */ |
2296 | if (dev->class == ATA_DEV_ATA) { | |
b352e57d AC |
2297 | if (ata_id_is_cfa(id)) { |
2298 | if (id[162] & 1) /* CPRM may make this media unusable */ | |
44877b4e TH |
2299 | ata_dev_printk(dev, KERN_WARNING, |
2300 | "supports DRM functions and may " | |
2301 | "not be fully accessable.\n"); | |
b352e57d | 2302 | snprintf(revbuf, 7, "CFA"); |
ae8d4ee7 | 2303 | } else { |
2dcb407e | 2304 | snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); |
ae8d4ee7 AC |
2305 | /* Warn the user if the device has TPM extensions */ |
2306 | if (ata_id_has_tpm(id)) | |
2307 | ata_dev_printk(dev, KERN_WARNING, | |
2308 | "supports DRM functions and may " | |
2309 | "not be fully accessable.\n"); | |
2310 | } | |
b352e57d | 2311 | |
1148c3a7 | 2312 | dev->n_sectors = ata_id_n_sectors(id); |
2940740b | 2313 | |
3f64f565 EM |
2314 | if (dev->id[59] & 0x100) |
2315 | dev->multi_count = dev->id[59] & 0xff; | |
2316 | ||
1148c3a7 | 2317 | if (ata_id_has_lba(id)) { |
4c2d721a | 2318 | const char *lba_desc; |
a6e6ce8e | 2319 | char ncq_desc[20]; |
8bf62ece | 2320 | |
4c2d721a TH |
2321 | lba_desc = "LBA"; |
2322 | dev->flags |= ATA_DFLAG_LBA; | |
1148c3a7 | 2323 | if (ata_id_has_lba48(id)) { |
8bf62ece | 2324 | dev->flags |= ATA_DFLAG_LBA48; |
4c2d721a | 2325 | lba_desc = "LBA48"; |
6fc49adb TH |
2326 | |
2327 | if (dev->n_sectors >= (1UL << 28) && | |
2328 | ata_id_has_flush_ext(id)) | |
2329 | dev->flags |= ATA_DFLAG_FLUSH_EXT; | |
4c2d721a | 2330 | } |
8bf62ece | 2331 | |
a6e6ce8e TH |
2332 | /* config NCQ */ |
2333 | ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); | |
2334 | ||
8bf62ece | 2335 | /* print device info to dmesg */ |
3f64f565 EM |
2336 | if (ata_msg_drv(ap) && print_info) { |
2337 | ata_dev_printk(dev, KERN_INFO, | |
2338 | "%s: %s, %s, max %s\n", | |
2339 | revbuf, modelbuf, fwrevbuf, | |
2340 | ata_mode_string(xfer_mask)); | |
2341 | ata_dev_printk(dev, KERN_INFO, | |
2342 | "%Lu sectors, multi %u: %s %s\n", | |
f15a1daf | 2343 | (unsigned long long)dev->n_sectors, |
3f64f565 EM |
2344 | dev->multi_count, lba_desc, ncq_desc); |
2345 | } | |
ffeae418 | 2346 | } else { |
8bf62ece AL |
2347 | /* CHS */ |
2348 | ||
2349 | /* Default translation */ | |
1148c3a7 TH |
2350 | dev->cylinders = id[1]; |
2351 | dev->heads = id[3]; | |
2352 | dev->sectors = id[6]; | |
8bf62ece | 2353 | |
1148c3a7 | 2354 | if (ata_id_current_chs_valid(id)) { |
8bf62ece | 2355 | /* Current CHS translation is valid. */ |
1148c3a7 TH |
2356 | dev->cylinders = id[54]; |
2357 | dev->heads = id[55]; | |
2358 | dev->sectors = id[56]; | |
8bf62ece AL |
2359 | } |
2360 | ||
2361 | /* print device info to dmesg */ | |
3f64f565 | 2362 | if (ata_msg_drv(ap) && print_info) { |
88574551 | 2363 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2364 | "%s: %s, %s, max %s\n", |
2365 | revbuf, modelbuf, fwrevbuf, | |
2366 | ata_mode_string(xfer_mask)); | |
a84471fe | 2367 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2368 | "%Lu sectors, multi %u, CHS %u/%u/%u\n", |
2369 | (unsigned long long)dev->n_sectors, | |
2370 | dev->multi_count, dev->cylinders, | |
2371 | dev->heads, dev->sectors); | |
2372 | } | |
07f6f7d0 AL |
2373 | } |
2374 | ||
6e7846e9 | 2375 | dev->cdb_len = 16; |
1da177e4 LT |
2376 | } |
2377 | ||
2378 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 2379 | else if (dev->class == ATA_DEV_ATAPI) { |
854c73a2 TH |
2380 | const char *cdb_intr_string = ""; |
2381 | const char *atapi_an_string = ""; | |
91163006 | 2382 | const char *dma_dir_string = ""; |
7d77b247 | 2383 | u32 sntf; |
08a556db | 2384 | |
1148c3a7 | 2385 | rc = atapi_cdb_len(id); |
1da177e4 | 2386 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
0dd4b21f | 2387 | if (ata_msg_warn(ap)) |
88574551 TH |
2388 | ata_dev_printk(dev, KERN_WARNING, |
2389 | "unsupported CDB len\n"); | |
ffeae418 | 2390 | rc = -EINVAL; |
1da177e4 LT |
2391 | goto err_out_nosup; |
2392 | } | |
6e7846e9 | 2393 | dev->cdb_len = (unsigned int) rc; |
1da177e4 | 2394 | |
7d77b247 TH |
2395 | /* Enable ATAPI AN if both the host and device have |
2396 | * the support. If PMP is attached, SNTF is required | |
2397 | * to enable ATAPI AN to discern between PHY status | |
2398 | * changed notifications and ATAPI ANs. | |
9f45cbd3 | 2399 | */ |
7d77b247 | 2400 | if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && |
071f44b1 | 2401 | (!sata_pmp_attached(ap) || |
7d77b247 | 2402 | sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { |
854c73a2 TH |
2403 | unsigned int err_mask; |
2404 | ||
9f45cbd3 | 2405 | /* issue SET feature command to turn this on */ |
218f3d30 JG |
2406 | err_mask = ata_dev_set_feature(dev, |
2407 | SETFEATURES_SATA_ENABLE, SATA_AN); | |
854c73a2 | 2408 | if (err_mask) |
9f45cbd3 | 2409 | ata_dev_printk(dev, KERN_ERR, |
854c73a2 TH |
2410 | "failed to enable ATAPI AN " |
2411 | "(err_mask=0x%x)\n", err_mask); | |
2412 | else { | |
9f45cbd3 | 2413 | dev->flags |= ATA_DFLAG_AN; |
854c73a2 TH |
2414 | atapi_an_string = ", ATAPI AN"; |
2415 | } | |
9f45cbd3 KCA |
2416 | } |
2417 | ||
08a556db | 2418 | if (ata_id_cdb_intr(dev->id)) { |
312f7da2 | 2419 | dev->flags |= ATA_DFLAG_CDB_INTR; |
08a556db AL |
2420 | cdb_intr_string = ", CDB intr"; |
2421 | } | |
312f7da2 | 2422 | |
91163006 TH |
2423 | if (atapi_dmadir || atapi_id_dmadir(dev->id)) { |
2424 | dev->flags |= ATA_DFLAG_DMADIR; | |
2425 | dma_dir_string = ", DMADIR"; | |
2426 | } | |
2427 | ||
1da177e4 | 2428 | /* print device info to dmesg */ |
5afc8142 | 2429 | if (ata_msg_drv(ap) && print_info) |
ef143d57 | 2430 | ata_dev_printk(dev, KERN_INFO, |
91163006 | 2431 | "ATAPI: %s, %s, max %s%s%s%s\n", |
ef143d57 | 2432 | modelbuf, fwrevbuf, |
12436c30 | 2433 | ata_mode_string(xfer_mask), |
91163006 TH |
2434 | cdb_intr_string, atapi_an_string, |
2435 | dma_dir_string); | |
1da177e4 LT |
2436 | } |
2437 | ||
914ed354 TH |
2438 | /* determine max_sectors */ |
2439 | dev->max_sectors = ATA_MAX_SECTORS; | |
2440 | if (dev->flags & ATA_DFLAG_LBA48) | |
2441 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; | |
2442 | ||
ca77329f KCA |
2443 | if (!(dev->horkage & ATA_HORKAGE_IPM)) { |
2444 | if (ata_id_has_hipm(dev->id)) | |
2445 | dev->flags |= ATA_DFLAG_HIPM; | |
2446 | if (ata_id_has_dipm(dev->id)) | |
2447 | dev->flags |= ATA_DFLAG_DIPM; | |
2448 | } | |
2449 | ||
c5038fc0 AC |
2450 | /* Limit PATA drive on SATA cable bridge transfers to udma5, |
2451 | 200 sectors */ | |
3373efd8 | 2452 | if (ata_dev_knobble(dev)) { |
5afc8142 | 2453 | if (ata_msg_drv(ap) && print_info) |
f15a1daf TH |
2454 | ata_dev_printk(dev, KERN_INFO, |
2455 | "applying bridge limits\n"); | |
5a529139 | 2456 | dev->udma_mask &= ATA_UDMA5; |
4b2f3ede TH |
2457 | dev->max_sectors = ATA_MAX_SECTORS; |
2458 | } | |
2459 | ||
f8d8e579 | 2460 | if ((dev->class == ATA_DEV_ATAPI) && |
f442cd86 | 2461 | (atapi_command_packet_set(id) == TYPE_TAPE)) { |
f8d8e579 | 2462 | dev->max_sectors = ATA_MAX_SECTORS_TAPE; |
f442cd86 AL |
2463 | dev->horkage |= ATA_HORKAGE_STUCK_ERR; |
2464 | } | |
f8d8e579 | 2465 | |
75683fe7 | 2466 | if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) |
03ec52de TH |
2467 | dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, |
2468 | dev->max_sectors); | |
18d6e9d5 | 2469 | |
ca77329f KCA |
2470 | if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) { |
2471 | dev->horkage |= ATA_HORKAGE_IPM; | |
2472 | ||
2473 | /* reset link pm_policy for this port to no pm */ | |
2474 | ap->pm_policy = MAX_PERFORMANCE; | |
2475 | } | |
2476 | ||
4b2f3ede | 2477 | if (ap->ops->dev_config) |
cd0d3bbc | 2478 | ap->ops->dev_config(dev); |
4b2f3ede | 2479 | |
c5038fc0 AC |
2480 | if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
2481 | /* Let the user know. We don't want to disallow opens for | |
2482 | rescue purposes, or in case the vendor is just a blithering | |
2483 | idiot. Do this after the dev_config call as some controllers | |
2484 | with buggy firmware may want to avoid reporting false device | |
2485 | bugs */ | |
2486 | ||
2487 | if (print_info) { | |
2488 | ata_dev_printk(dev, KERN_WARNING, | |
2489 | "Drive reports diagnostics failure. This may indicate a drive\n"); | |
2490 | ata_dev_printk(dev, KERN_WARNING, | |
2491 | "fault or invalid emulation. Contact drive vendor for information.\n"); | |
2492 | } | |
2493 | } | |
2494 | ||
ac70a964 TH |
2495 | if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) { |
2496 | ata_dev_printk(dev, KERN_WARNING, "WARNING: device requires " | |
2497 | "firmware update to be fully functional.\n"); | |
2498 | ata_dev_printk(dev, KERN_WARNING, " contact the vendor " | |
2499 | "or visit http://ata.wiki.kernel.org.\n"); | |
2500 | } | |
2501 | ||
ffeae418 | 2502 | return 0; |
1da177e4 LT |
2503 | |
2504 | err_out_nosup: | |
0dd4b21f | 2505 | if (ata_msg_probe(ap)) |
88574551 | 2506 | ata_dev_printk(dev, KERN_DEBUG, |
7f5e4e8d | 2507 | "%s: EXIT, err\n", __func__); |
ffeae418 | 2508 | return rc; |
1da177e4 LT |
2509 | } |
2510 | ||
be0d18df | 2511 | /** |
2e41e8e6 | 2512 | * ata_cable_40wire - return 40 wire cable type |
be0d18df AC |
2513 | * @ap: port |
2514 | * | |
2e41e8e6 | 2515 | * Helper method for drivers which want to hardwire 40 wire cable |
be0d18df AC |
2516 | * detection. |
2517 | */ | |
2518 | ||
2519 | int ata_cable_40wire(struct ata_port *ap) | |
2520 | { | |
2521 | return ATA_CBL_PATA40; | |
2522 | } | |
2523 | ||
2524 | /** | |
2e41e8e6 | 2525 | * ata_cable_80wire - return 80 wire cable type |
be0d18df AC |
2526 | * @ap: port |
2527 | * | |
2e41e8e6 | 2528 | * Helper method for drivers which want to hardwire 80 wire cable |
be0d18df AC |
2529 | * detection. |
2530 | */ | |
2531 | ||
2532 | int ata_cable_80wire(struct ata_port *ap) | |
2533 | { | |
2534 | return ATA_CBL_PATA80; | |
2535 | } | |
2536 | ||
2537 | /** | |
2538 | * ata_cable_unknown - return unknown PATA cable. | |
2539 | * @ap: port | |
2540 | * | |
2541 | * Helper method for drivers which have no PATA cable detection. | |
2542 | */ | |
2543 | ||
2544 | int ata_cable_unknown(struct ata_port *ap) | |
2545 | { | |
2546 | return ATA_CBL_PATA_UNK; | |
2547 | } | |
2548 | ||
c88f90c3 TH |
2549 | /** |
2550 | * ata_cable_ignore - return ignored PATA cable. | |
2551 | * @ap: port | |
2552 | * | |
2553 | * Helper method for drivers which don't use cable type to limit | |
2554 | * transfer mode. | |
2555 | */ | |
2556 | int ata_cable_ignore(struct ata_port *ap) | |
2557 | { | |
2558 | return ATA_CBL_PATA_IGN; | |
2559 | } | |
2560 | ||
be0d18df AC |
2561 | /** |
2562 | * ata_cable_sata - return SATA cable type | |
2563 | * @ap: port | |
2564 | * | |
2565 | * Helper method for drivers which have SATA cables | |
2566 | */ | |
2567 | ||
2568 | int ata_cable_sata(struct ata_port *ap) | |
2569 | { | |
2570 | return ATA_CBL_SATA; | |
2571 | } | |
2572 | ||
1da177e4 LT |
2573 | /** |
2574 | * ata_bus_probe - Reset and probe ATA bus | |
2575 | * @ap: Bus to probe | |
2576 | * | |
0cba632b JG |
2577 | * Master ATA bus probing function. Initiates a hardware-dependent |
2578 | * bus reset, then attempts to identify any devices found on | |
2579 | * the bus. | |
2580 | * | |
1da177e4 | 2581 | * LOCKING: |
0cba632b | 2582 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2583 | * |
2584 | * RETURNS: | |
96072e69 | 2585 | * Zero on success, negative errno otherwise. |
1da177e4 LT |
2586 | */ |
2587 | ||
80289167 | 2588 | int ata_bus_probe(struct ata_port *ap) |
1da177e4 | 2589 | { |
28ca5c57 | 2590 | unsigned int classes[ATA_MAX_DEVICES]; |
14d2bac1 | 2591 | int tries[ATA_MAX_DEVICES]; |
f58229f8 | 2592 | int rc; |
e82cbdb9 | 2593 | struct ata_device *dev; |
1da177e4 | 2594 | |
28ca5c57 | 2595 | ata_port_probe(ap); |
c19ba8af | 2596 | |
f58229f8 TH |
2597 | ata_link_for_each_dev(dev, &ap->link) |
2598 | tries[dev->devno] = ATA_PROBE_MAX_TRIES; | |
14d2bac1 TH |
2599 | |
2600 | retry: | |
cdeab114 TH |
2601 | ata_link_for_each_dev(dev, &ap->link) { |
2602 | /* If we issue an SRST then an ATA drive (not ATAPI) | |
2603 | * may change configuration and be in PIO0 timing. If | |
2604 | * we do a hard reset (or are coming from power on) | |
2605 | * this is true for ATA or ATAPI. Until we've set a | |
2606 | * suitable controller mode we should not touch the | |
2607 | * bus as we may be talking too fast. | |
2608 | */ | |
2609 | dev->pio_mode = XFER_PIO_0; | |
2610 | ||
2611 | /* If the controller has a pio mode setup function | |
2612 | * then use it to set the chipset to rights. Don't | |
2613 | * touch the DMA setup as that will be dealt with when | |
2614 | * configuring devices. | |
2615 | */ | |
2616 | if (ap->ops->set_piomode) | |
2617 | ap->ops->set_piomode(ap, dev); | |
2618 | } | |
2619 | ||
2044470c | 2620 | /* reset and determine device classes */ |
52783c5d | 2621 | ap->ops->phy_reset(ap); |
2061a47a | 2622 | |
f58229f8 | 2623 | ata_link_for_each_dev(dev, &ap->link) { |
52783c5d TH |
2624 | if (!(ap->flags & ATA_FLAG_DISABLED) && |
2625 | dev->class != ATA_DEV_UNKNOWN) | |
2626 | classes[dev->devno] = dev->class; | |
2627 | else | |
2628 | classes[dev->devno] = ATA_DEV_NONE; | |
2044470c | 2629 | |
52783c5d | 2630 | dev->class = ATA_DEV_UNKNOWN; |
28ca5c57 | 2631 | } |
1da177e4 | 2632 | |
52783c5d | 2633 | ata_port_probe(ap); |
2044470c | 2634 | |
f31f0cc2 JG |
2635 | /* read IDENTIFY page and configure devices. We have to do the identify |
2636 | specific sequence bass-ackwards so that PDIAG- is released by | |
2637 | the slave device */ | |
2638 | ||
a4ba7fe2 | 2639 | ata_link_for_each_dev_reverse(dev, &ap->link) { |
f58229f8 TH |
2640 | if (tries[dev->devno]) |
2641 | dev->class = classes[dev->devno]; | |
ffeae418 | 2642 | |
14d2bac1 | 2643 | if (!ata_dev_enabled(dev)) |
ffeae418 | 2644 | continue; |
ffeae418 | 2645 | |
bff04647 TH |
2646 | rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
2647 | dev->id); | |
14d2bac1 TH |
2648 | if (rc) |
2649 | goto fail; | |
f31f0cc2 JG |
2650 | } |
2651 | ||
be0d18df AC |
2652 | /* Now ask for the cable type as PDIAG- should have been released */ |
2653 | if (ap->ops->cable_detect) | |
2654 | ap->cbl = ap->ops->cable_detect(ap); | |
2655 | ||
614fe29b AC |
2656 | /* We may have SATA bridge glue hiding here irrespective of the |
2657 | reported cable types and sensed types */ | |
2658 | ata_link_for_each_dev(dev, &ap->link) { | |
2659 | if (!ata_dev_enabled(dev)) | |
2660 | continue; | |
2661 | /* SATA drives indicate we have a bridge. We don't know which | |
2662 | end of the link the bridge is which is a problem */ | |
2663 | if (ata_id_is_sata(dev->id)) | |
2664 | ap->cbl = ATA_CBL_SATA; | |
2665 | } | |
2666 | ||
f31f0cc2 JG |
2667 | /* After the identify sequence we can now set up the devices. We do |
2668 | this in the normal order so that the user doesn't get confused */ | |
2669 | ||
f58229f8 | 2670 | ata_link_for_each_dev(dev, &ap->link) { |
f31f0cc2 JG |
2671 | if (!ata_dev_enabled(dev)) |
2672 | continue; | |
14d2bac1 | 2673 | |
9af5c9c9 | 2674 | ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; |
efdaedc4 | 2675 | rc = ata_dev_configure(dev); |
9af5c9c9 | 2676 | ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; |
14d2bac1 TH |
2677 | if (rc) |
2678 | goto fail; | |
1da177e4 LT |
2679 | } |
2680 | ||
e82cbdb9 | 2681 | /* configure transfer mode */ |
0260731f | 2682 | rc = ata_set_mode(&ap->link, &dev); |
4ae72a1e | 2683 | if (rc) |
51713d35 | 2684 | goto fail; |
1da177e4 | 2685 | |
f58229f8 TH |
2686 | ata_link_for_each_dev(dev, &ap->link) |
2687 | if (ata_dev_enabled(dev)) | |
e82cbdb9 | 2688 | return 0; |
1da177e4 | 2689 | |
e82cbdb9 TH |
2690 | /* no device present, disable port */ |
2691 | ata_port_disable(ap); | |
96072e69 | 2692 | return -ENODEV; |
14d2bac1 TH |
2693 | |
2694 | fail: | |
4ae72a1e TH |
2695 | tries[dev->devno]--; |
2696 | ||
14d2bac1 TH |
2697 | switch (rc) { |
2698 | case -EINVAL: | |
4ae72a1e | 2699 | /* eeek, something went very wrong, give up */ |
14d2bac1 TH |
2700 | tries[dev->devno] = 0; |
2701 | break; | |
4ae72a1e TH |
2702 | |
2703 | case -ENODEV: | |
2704 | /* give it just one more chance */ | |
2705 | tries[dev->devno] = min(tries[dev->devno], 1); | |
14d2bac1 | 2706 | case -EIO: |
4ae72a1e TH |
2707 | if (tries[dev->devno] == 1) { |
2708 | /* This is the last chance, better to slow | |
2709 | * down than lose it. | |
2710 | */ | |
936fd732 | 2711 | sata_down_spd_limit(&ap->link); |
4ae72a1e TH |
2712 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
2713 | } | |
14d2bac1 TH |
2714 | } |
2715 | ||
4ae72a1e | 2716 | if (!tries[dev->devno]) |
3373efd8 | 2717 | ata_dev_disable(dev); |
ec573755 | 2718 | |
14d2bac1 | 2719 | goto retry; |
1da177e4 LT |
2720 | } |
2721 | ||
2722 | /** | |
0cba632b JG |
2723 | * ata_port_probe - Mark port as enabled |
2724 | * @ap: Port for which we indicate enablement | |
1da177e4 | 2725 | * |
0cba632b JG |
2726 | * Modify @ap data structure such that the system |
2727 | * thinks that the entire port is enabled. | |
2728 | * | |
cca3974e | 2729 | * LOCKING: host lock, or some other form of |
0cba632b | 2730 | * serialization. |
1da177e4 LT |
2731 | */ |
2732 | ||
2733 | void ata_port_probe(struct ata_port *ap) | |
2734 | { | |
198e0fed | 2735 | ap->flags &= ~ATA_FLAG_DISABLED; |
1da177e4 LT |
2736 | } |
2737 | ||
3be680b7 TH |
2738 | /** |
2739 | * sata_print_link_status - Print SATA link status | |
936fd732 | 2740 | * @link: SATA link to printk link status about |
3be680b7 TH |
2741 | * |
2742 | * This function prints link speed and status of a SATA link. | |
2743 | * | |
2744 | * LOCKING: | |
2745 | * None. | |
2746 | */ | |
6bdb4fc9 | 2747 | static void sata_print_link_status(struct ata_link *link) |
3be680b7 | 2748 | { |
6d5f9732 | 2749 | u32 sstatus, scontrol, tmp; |
3be680b7 | 2750 | |
936fd732 | 2751 | if (sata_scr_read(link, SCR_STATUS, &sstatus)) |
3be680b7 | 2752 | return; |
936fd732 | 2753 | sata_scr_read(link, SCR_CONTROL, &scontrol); |
3be680b7 | 2754 | |
b1c72916 | 2755 | if (ata_phys_link_online(link)) { |
3be680b7 | 2756 | tmp = (sstatus >> 4) & 0xf; |
936fd732 | 2757 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2758 | "SATA link up %s (SStatus %X SControl %X)\n", |
2759 | sata_spd_string(tmp), sstatus, scontrol); | |
3be680b7 | 2760 | } else { |
936fd732 | 2761 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2762 | "SATA link down (SStatus %X SControl %X)\n", |
2763 | sstatus, scontrol); | |
3be680b7 TH |
2764 | } |
2765 | } | |
2766 | ||
ebdfca6e AC |
2767 | /** |
2768 | * ata_dev_pair - return other device on cable | |
ebdfca6e AC |
2769 | * @adev: device |
2770 | * | |
2771 | * Obtain the other device on the same cable, or if none is | |
2772 | * present NULL is returned | |
2773 | */ | |
2e9edbf8 | 2774 | |
3373efd8 | 2775 | struct ata_device *ata_dev_pair(struct ata_device *adev) |
ebdfca6e | 2776 | { |
9af5c9c9 TH |
2777 | struct ata_link *link = adev->link; |
2778 | struct ata_device *pair = &link->device[1 - adev->devno]; | |
e1211e3f | 2779 | if (!ata_dev_enabled(pair)) |
ebdfca6e AC |
2780 | return NULL; |
2781 | return pair; | |
2782 | } | |
2783 | ||
1da177e4 | 2784 | /** |
780a87f7 JG |
2785 | * ata_port_disable - Disable port. |
2786 | * @ap: Port to be disabled. | |
1da177e4 | 2787 | * |
780a87f7 JG |
2788 | * Modify @ap data structure such that the system |
2789 | * thinks that the entire port is disabled, and should | |
2790 | * never attempt to probe or communicate with devices | |
2791 | * on this port. | |
2792 | * | |
cca3974e | 2793 | * LOCKING: host lock, or some other form of |
780a87f7 | 2794 | * serialization. |
1da177e4 LT |
2795 | */ |
2796 | ||
2797 | void ata_port_disable(struct ata_port *ap) | |
2798 | { | |
9af5c9c9 TH |
2799 | ap->link.device[0].class = ATA_DEV_NONE; |
2800 | ap->link.device[1].class = ATA_DEV_NONE; | |
198e0fed | 2801 | ap->flags |= ATA_FLAG_DISABLED; |
1da177e4 LT |
2802 | } |
2803 | ||
1c3fae4d | 2804 | /** |
3c567b7d | 2805 | * sata_down_spd_limit - adjust SATA spd limit downward |
936fd732 | 2806 | * @link: Link to adjust SATA spd limit for |
1c3fae4d | 2807 | * |
936fd732 | 2808 | * Adjust SATA spd limit of @link downward. Note that this |
1c3fae4d | 2809 | * function only adjusts the limit. The change must be applied |
3c567b7d | 2810 | * using sata_set_spd(). |
1c3fae4d TH |
2811 | * |
2812 | * LOCKING: | |
2813 | * Inherited from caller. | |
2814 | * | |
2815 | * RETURNS: | |
2816 | * 0 on success, negative errno on failure | |
2817 | */ | |
936fd732 | 2818 | int sata_down_spd_limit(struct ata_link *link) |
1c3fae4d | 2819 | { |
81952c54 TH |
2820 | u32 sstatus, spd, mask; |
2821 | int rc, highbit; | |
1c3fae4d | 2822 | |
936fd732 | 2823 | if (!sata_scr_valid(link)) |
008a7896 TH |
2824 | return -EOPNOTSUPP; |
2825 | ||
2826 | /* If SCR can be read, use it to determine the current SPD. | |
936fd732 | 2827 | * If not, use cached value in link->sata_spd. |
008a7896 | 2828 | */ |
936fd732 | 2829 | rc = sata_scr_read(link, SCR_STATUS, &sstatus); |
008a7896 TH |
2830 | if (rc == 0) |
2831 | spd = (sstatus >> 4) & 0xf; | |
2832 | else | |
936fd732 | 2833 | spd = link->sata_spd; |
1c3fae4d | 2834 | |
936fd732 | 2835 | mask = link->sata_spd_limit; |
1c3fae4d TH |
2836 | if (mask <= 1) |
2837 | return -EINVAL; | |
008a7896 TH |
2838 | |
2839 | /* unconditionally mask off the highest bit */ | |
1c3fae4d TH |
2840 | highbit = fls(mask) - 1; |
2841 | mask &= ~(1 << highbit); | |
2842 | ||
008a7896 TH |
2843 | /* Mask off all speeds higher than or equal to the current |
2844 | * one. Force 1.5Gbps if current SPD is not available. | |
2845 | */ | |
2846 | if (spd > 1) | |
2847 | mask &= (1 << (spd - 1)) - 1; | |
2848 | else | |
2849 | mask &= 1; | |
2850 | ||
2851 | /* were we already at the bottom? */ | |
1c3fae4d TH |
2852 | if (!mask) |
2853 | return -EINVAL; | |
2854 | ||
936fd732 | 2855 | link->sata_spd_limit = mask; |
1c3fae4d | 2856 | |
936fd732 | 2857 | ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", |
f15a1daf | 2858 | sata_spd_string(fls(mask))); |
1c3fae4d TH |
2859 | |
2860 | return 0; | |
2861 | } | |
2862 | ||
936fd732 | 2863 | static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) |
1c3fae4d | 2864 | { |
5270222f TH |
2865 | struct ata_link *host_link = &link->ap->link; |
2866 | u32 limit, target, spd; | |
1c3fae4d | 2867 | |
5270222f TH |
2868 | limit = link->sata_spd_limit; |
2869 | ||
2870 | /* Don't configure downstream link faster than upstream link. | |
2871 | * It doesn't speed up anything and some PMPs choke on such | |
2872 | * configuration. | |
2873 | */ | |
2874 | if (!ata_is_host_link(link) && host_link->sata_spd) | |
2875 | limit &= (1 << host_link->sata_spd) - 1; | |
2876 | ||
2877 | if (limit == UINT_MAX) | |
2878 | target = 0; | |
1c3fae4d | 2879 | else |
5270222f | 2880 | target = fls(limit); |
1c3fae4d TH |
2881 | |
2882 | spd = (*scontrol >> 4) & 0xf; | |
5270222f | 2883 | *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4); |
1c3fae4d | 2884 | |
5270222f | 2885 | return spd != target; |
1c3fae4d TH |
2886 | } |
2887 | ||
2888 | /** | |
3c567b7d | 2889 | * sata_set_spd_needed - is SATA spd configuration needed |
936fd732 | 2890 | * @link: Link in question |
1c3fae4d TH |
2891 | * |
2892 | * Test whether the spd limit in SControl matches | |
936fd732 | 2893 | * @link->sata_spd_limit. This function is used to determine |
1c3fae4d TH |
2894 | * whether hardreset is necessary to apply SATA spd |
2895 | * configuration. | |
2896 | * | |
2897 | * LOCKING: | |
2898 | * Inherited from caller. | |
2899 | * | |
2900 | * RETURNS: | |
2901 | * 1 if SATA spd configuration is needed, 0 otherwise. | |
2902 | */ | |
1dc55e87 | 2903 | static int sata_set_spd_needed(struct ata_link *link) |
1c3fae4d TH |
2904 | { |
2905 | u32 scontrol; | |
2906 | ||
936fd732 | 2907 | if (sata_scr_read(link, SCR_CONTROL, &scontrol)) |
db64bcf3 | 2908 | return 1; |
1c3fae4d | 2909 | |
936fd732 | 2910 | return __sata_set_spd_needed(link, &scontrol); |
1c3fae4d TH |
2911 | } |
2912 | ||
2913 | /** | |
3c567b7d | 2914 | * sata_set_spd - set SATA spd according to spd limit |
936fd732 | 2915 | * @link: Link to set SATA spd for |
1c3fae4d | 2916 | * |
936fd732 | 2917 | * Set SATA spd of @link according to sata_spd_limit. |
1c3fae4d TH |
2918 | * |
2919 | * LOCKING: | |
2920 | * Inherited from caller. | |
2921 | * | |
2922 | * RETURNS: | |
2923 | * 0 if spd doesn't need to be changed, 1 if spd has been | |
81952c54 | 2924 | * changed. Negative errno if SCR registers are inaccessible. |
1c3fae4d | 2925 | */ |
936fd732 | 2926 | int sata_set_spd(struct ata_link *link) |
1c3fae4d TH |
2927 | { |
2928 | u32 scontrol; | |
81952c54 | 2929 | int rc; |
1c3fae4d | 2930 | |
936fd732 | 2931 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 2932 | return rc; |
1c3fae4d | 2933 | |
936fd732 | 2934 | if (!__sata_set_spd_needed(link, &scontrol)) |
1c3fae4d TH |
2935 | return 0; |
2936 | ||
936fd732 | 2937 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 TH |
2938 | return rc; |
2939 | ||
1c3fae4d TH |
2940 | return 1; |
2941 | } | |
2942 | ||
452503f9 AC |
2943 | /* |
2944 | * This mode timing computation functionality is ported over from | |
2945 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
2946 | */ | |
2947 | /* | |
b352e57d | 2948 | * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). |
452503f9 | 2949 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
b352e57d AC |
2950 | * for UDMA6, which is currently supported only by Maxtor drives. |
2951 | * | |
2952 | * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. | |
452503f9 AC |
2953 | */ |
2954 | ||
2955 | static const struct ata_timing ata_timing[] = { | |
70cd071e TH |
2956 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ |
2957 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, | |
2958 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, | |
2959 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, | |
2960 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, | |
2961 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, | |
2962 | { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, | |
2963 | { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, | |
452503f9 | 2964 | |
70cd071e TH |
2965 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, |
2966 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, | |
2967 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, | |
452503f9 | 2968 | |
70cd071e TH |
2969 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, |
2970 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, | |
2971 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, | |
b352e57d | 2972 | { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, |
70cd071e | 2973 | { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, |
452503f9 AC |
2974 | |
2975 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
70cd071e TH |
2976 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, |
2977 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
2978 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, | |
2979 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
2980 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
2981 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
2982 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
452503f9 AC |
2983 | |
2984 | { 0xFF } | |
2985 | }; | |
2986 | ||
2dcb407e JG |
2987 | #define ENOUGH(v, unit) (((v)-1)/(unit)+1) |
2988 | #define EZ(v, unit) ((v)?ENOUGH(v, unit):0) | |
452503f9 AC |
2989 | |
2990 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
2991 | { | |
2992 | q->setup = EZ(t->setup * 1000, T); | |
2993 | q->act8b = EZ(t->act8b * 1000, T); | |
2994 | q->rec8b = EZ(t->rec8b * 1000, T); | |
2995 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
2996 | q->active = EZ(t->active * 1000, T); | |
2997 | q->recover = EZ(t->recover * 1000, T); | |
2998 | q->cycle = EZ(t->cycle * 1000, T); | |
2999 | q->udma = EZ(t->udma * 1000, UT); | |
3000 | } | |
3001 | ||
3002 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
3003 | struct ata_timing *m, unsigned int what) | |
3004 | { | |
3005 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
3006 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
3007 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
3008 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
3009 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
3010 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
3011 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); | |
3012 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
3013 | } | |
3014 | ||
6357357c | 3015 | const struct ata_timing *ata_timing_find_mode(u8 xfer_mode) |
452503f9 | 3016 | { |
70cd071e TH |
3017 | const struct ata_timing *t = ata_timing; |
3018 | ||
3019 | while (xfer_mode > t->mode) | |
3020 | t++; | |
452503f9 | 3021 | |
70cd071e TH |
3022 | if (xfer_mode == t->mode) |
3023 | return t; | |
3024 | return NULL; | |
452503f9 AC |
3025 | } |
3026 | ||
3027 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
3028 | struct ata_timing *t, int T, int UT) | |
3029 | { | |
3030 | const struct ata_timing *s; | |
3031 | struct ata_timing p; | |
3032 | ||
3033 | /* | |
2e9edbf8 | 3034 | * Find the mode. |
75b1f2f8 | 3035 | */ |
452503f9 AC |
3036 | |
3037 | if (!(s = ata_timing_find_mode(speed))) | |
3038 | return -EINVAL; | |
3039 | ||
75b1f2f8 AL |
3040 | memcpy(t, s, sizeof(*s)); |
3041 | ||
452503f9 AC |
3042 | /* |
3043 | * If the drive is an EIDE drive, it can tell us it needs extended | |
3044 | * PIO/MW_DMA cycle timing. | |
3045 | */ | |
3046 | ||
3047 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ | |
3048 | memset(&p, 0, sizeof(p)); | |
2dcb407e | 3049 | if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { |
452503f9 AC |
3050 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; |
3051 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; | |
2dcb407e | 3052 | } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { |
452503f9 AC |
3053 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; |
3054 | } | |
3055 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); | |
3056 | } | |
3057 | ||
3058 | /* | |
3059 | * Convert the timing to bus clock counts. | |
3060 | */ | |
3061 | ||
75b1f2f8 | 3062 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
3063 | |
3064 | /* | |
c893a3ae RD |
3065 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
3066 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
3067 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
3068 | */ |
3069 | ||
fd3367af | 3070 | if (speed > XFER_PIO_6) { |
452503f9 AC |
3071 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
3072 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
3073 | } | |
3074 | ||
3075 | /* | |
c893a3ae | 3076 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
3077 | */ |
3078 | ||
3079 | if (t->act8b + t->rec8b < t->cyc8b) { | |
3080 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
3081 | t->rec8b = t->cyc8b - t->act8b; | |
3082 | } | |
3083 | ||
3084 | if (t->active + t->recover < t->cycle) { | |
3085 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
3086 | t->recover = t->cycle - t->active; | |
3087 | } | |
a617c09f | 3088 | |
4f701d1e AC |
3089 | /* In a few cases quantisation may produce enough errors to |
3090 | leave t->cycle too low for the sum of active and recovery | |
3091 | if so we must correct this */ | |
3092 | if (t->active + t->recover > t->cycle) | |
3093 | t->cycle = t->active + t->recover; | |
452503f9 AC |
3094 | |
3095 | return 0; | |
3096 | } | |
3097 | ||
a0f79b92 TH |
3098 | /** |
3099 | * ata_timing_cycle2mode - find xfer mode for the specified cycle duration | |
3100 | * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. | |
3101 | * @cycle: cycle duration in ns | |
3102 | * | |
3103 | * Return matching xfer mode for @cycle. The returned mode is of | |
3104 | * the transfer type specified by @xfer_shift. If @cycle is too | |
3105 | * slow for @xfer_shift, 0xff is returned. If @cycle is faster | |
3106 | * than the fastest known mode, the fasted mode is returned. | |
3107 | * | |
3108 | * LOCKING: | |
3109 | * None. | |
3110 | * | |
3111 | * RETURNS: | |
3112 | * Matching xfer_mode, 0xff if no match found. | |
3113 | */ | |
3114 | u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) | |
3115 | { | |
3116 | u8 base_mode = 0xff, last_mode = 0xff; | |
3117 | const struct ata_xfer_ent *ent; | |
3118 | const struct ata_timing *t; | |
3119 | ||
3120 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
3121 | if (ent->shift == xfer_shift) | |
3122 | base_mode = ent->base; | |
3123 | ||
3124 | for (t = ata_timing_find_mode(base_mode); | |
3125 | t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { | |
3126 | unsigned short this_cycle; | |
3127 | ||
3128 | switch (xfer_shift) { | |
3129 | case ATA_SHIFT_PIO: | |
3130 | case ATA_SHIFT_MWDMA: | |
3131 | this_cycle = t->cycle; | |
3132 | break; | |
3133 | case ATA_SHIFT_UDMA: | |
3134 | this_cycle = t->udma; | |
3135 | break; | |
3136 | default: | |
3137 | return 0xff; | |
3138 | } | |
3139 | ||
3140 | if (cycle > this_cycle) | |
3141 | break; | |
3142 | ||
3143 | last_mode = t->mode; | |
3144 | } | |
3145 | ||
3146 | return last_mode; | |
3147 | } | |
3148 | ||
cf176e1a TH |
3149 | /** |
3150 | * ata_down_xfermask_limit - adjust dev xfer masks downward | |
cf176e1a | 3151 | * @dev: Device to adjust xfer masks |
458337db | 3152 | * @sel: ATA_DNXFER_* selector |
cf176e1a TH |
3153 | * |
3154 | * Adjust xfer masks of @dev downward. Note that this function | |
3155 | * does not apply the change. Invoking ata_set_mode() afterwards | |
3156 | * will apply the limit. | |
3157 | * | |
3158 | * LOCKING: | |
3159 | * Inherited from caller. | |
3160 | * | |
3161 | * RETURNS: | |
3162 | * 0 on success, negative errno on failure | |
3163 | */ | |
458337db | 3164 | int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
cf176e1a | 3165 | { |
458337db | 3166 | char buf[32]; |
7dc951ae TH |
3167 | unsigned long orig_mask, xfer_mask; |
3168 | unsigned long pio_mask, mwdma_mask, udma_mask; | |
458337db | 3169 | int quiet, highbit; |
cf176e1a | 3170 | |
458337db TH |
3171 | quiet = !!(sel & ATA_DNXFER_QUIET); |
3172 | sel &= ~ATA_DNXFER_QUIET; | |
cf176e1a | 3173 | |
458337db TH |
3174 | xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
3175 | dev->mwdma_mask, | |
3176 | dev->udma_mask); | |
3177 | ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); | |
cf176e1a | 3178 | |
458337db TH |
3179 | switch (sel) { |
3180 | case ATA_DNXFER_PIO: | |
3181 | highbit = fls(pio_mask) - 1; | |
3182 | pio_mask &= ~(1 << highbit); | |
3183 | break; | |
3184 | ||
3185 | case ATA_DNXFER_DMA: | |
3186 | if (udma_mask) { | |
3187 | highbit = fls(udma_mask) - 1; | |
3188 | udma_mask &= ~(1 << highbit); | |
3189 | if (!udma_mask) | |
3190 | return -ENOENT; | |
3191 | } else if (mwdma_mask) { | |
3192 | highbit = fls(mwdma_mask) - 1; | |
3193 | mwdma_mask &= ~(1 << highbit); | |
3194 | if (!mwdma_mask) | |
3195 | return -ENOENT; | |
3196 | } | |
3197 | break; | |
3198 | ||
3199 | case ATA_DNXFER_40C: | |
3200 | udma_mask &= ATA_UDMA_MASK_40C; | |
3201 | break; | |
3202 | ||
3203 | case ATA_DNXFER_FORCE_PIO0: | |
3204 | pio_mask &= 1; | |
3205 | case ATA_DNXFER_FORCE_PIO: | |
3206 | mwdma_mask = 0; | |
3207 | udma_mask = 0; | |
3208 | break; | |
3209 | ||
458337db TH |
3210 | default: |
3211 | BUG(); | |
3212 | } | |
3213 | ||
3214 | xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
3215 | ||
3216 | if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) | |
3217 | return -ENOENT; | |
3218 | ||
3219 | if (!quiet) { | |
3220 | if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) | |
3221 | snprintf(buf, sizeof(buf), "%s:%s", | |
3222 | ata_mode_string(xfer_mask), | |
3223 | ata_mode_string(xfer_mask & ATA_MASK_PIO)); | |
3224 | else | |
3225 | snprintf(buf, sizeof(buf), "%s", | |
3226 | ata_mode_string(xfer_mask)); | |
3227 | ||
3228 | ata_dev_printk(dev, KERN_WARNING, | |
3229 | "limiting speed to %s\n", buf); | |
3230 | } | |
cf176e1a TH |
3231 | |
3232 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, | |
3233 | &dev->udma_mask); | |
3234 | ||
cf176e1a | 3235 | return 0; |
cf176e1a TH |
3236 | } |
3237 | ||
3373efd8 | 3238 | static int ata_dev_set_mode(struct ata_device *dev) |
1da177e4 | 3239 | { |
9af5c9c9 | 3240 | struct ata_eh_context *ehc = &dev->link->eh_context; |
4055dee7 TH |
3241 | const char *dev_err_whine = ""; |
3242 | int ign_dev_err = 0; | |
83206a29 TH |
3243 | unsigned int err_mask; |
3244 | int rc; | |
1da177e4 | 3245 | |
e8384607 | 3246 | dev->flags &= ~ATA_DFLAG_PIO; |
1da177e4 LT |
3247 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
3248 | dev->flags |= ATA_DFLAG_PIO; | |
3249 | ||
3373efd8 | 3250 | err_mask = ata_dev_set_xfermode(dev); |
2dcb407e | 3251 | |
4055dee7 TH |
3252 | if (err_mask & ~AC_ERR_DEV) |
3253 | goto fail; | |
3254 | ||
3255 | /* revalidate */ | |
3256 | ehc->i.flags |= ATA_EHI_POST_SETMODE; | |
3257 | rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); | |
3258 | ehc->i.flags &= ~ATA_EHI_POST_SETMODE; | |
3259 | if (rc) | |
3260 | return rc; | |
3261 | ||
b93fda12 AC |
3262 | if (dev->xfer_shift == ATA_SHIFT_PIO) { |
3263 | /* Old CFA may refuse this command, which is just fine */ | |
3264 | if (ata_id_is_cfa(dev->id)) | |
3265 | ign_dev_err = 1; | |
3266 | /* Catch several broken garbage emulations plus some pre | |
3267 | ATA devices */ | |
3268 | if (ata_id_major_version(dev->id) == 0 && | |
3269 | dev->pio_mode <= XFER_PIO_2) | |
3270 | ign_dev_err = 1; | |
3271 | /* Some very old devices and some bad newer ones fail | |
3272 | any kind of SET_XFERMODE request but support PIO0-2 | |
3273 | timings and no IORDY */ | |
3274 | if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2) | |
3275 | ign_dev_err = 1; | |
3276 | } | |
3acaf94b AC |
3277 | /* Early MWDMA devices do DMA but don't allow DMA mode setting. |
3278 | Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ | |
c5038fc0 | 3279 | if (dev->xfer_shift == ATA_SHIFT_MWDMA && |
3acaf94b AC |
3280 | dev->dma_mode == XFER_MW_DMA_0 && |
3281 | (dev->id[63] >> 8) & 1) | |
4055dee7 | 3282 | ign_dev_err = 1; |
3acaf94b | 3283 | |
4055dee7 TH |
3284 | /* if the device is actually configured correctly, ignore dev err */ |
3285 | if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) | |
3286 | ign_dev_err = 1; | |
1da177e4 | 3287 | |
4055dee7 TH |
3288 | if (err_mask & AC_ERR_DEV) { |
3289 | if (!ign_dev_err) | |
3290 | goto fail; | |
3291 | else | |
3292 | dev_err_whine = " (device error ignored)"; | |
3293 | } | |
48a8a14f | 3294 | |
23e71c3d TH |
3295 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
3296 | dev->xfer_shift, (int)dev->xfer_mode); | |
1da177e4 | 3297 | |
4055dee7 TH |
3298 | ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n", |
3299 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), | |
3300 | dev_err_whine); | |
3301 | ||
83206a29 | 3302 | return 0; |
4055dee7 TH |
3303 | |
3304 | fail: | |
3305 | ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " | |
3306 | "(err_mask=0x%x)\n", err_mask); | |
3307 | return -EIO; | |
1da177e4 LT |
3308 | } |
3309 | ||
1da177e4 | 3310 | /** |
04351821 | 3311 | * ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
0260731f | 3312 | * @link: link on which timings will be programmed |
1967b7ff | 3313 | * @r_failed_dev: out parameter for failed device |
1da177e4 | 3314 | * |
04351821 A |
3315 | * Standard implementation of the function used to tune and set |
3316 | * ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3317 | * ata_dev_set_mode() fails, pointer to the failing device is | |
e82cbdb9 | 3318 | * returned in @r_failed_dev. |
780a87f7 | 3319 | * |
1da177e4 | 3320 | * LOCKING: |
0cba632b | 3321 | * PCI/etc. bus probe sem. |
e82cbdb9 TH |
3322 | * |
3323 | * RETURNS: | |
3324 | * 0 on success, negative errno otherwise | |
1da177e4 | 3325 | */ |
04351821 | 3326 | |
0260731f | 3327 | int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
1da177e4 | 3328 | { |
0260731f | 3329 | struct ata_port *ap = link->ap; |
e8e0619f | 3330 | struct ata_device *dev; |
f58229f8 | 3331 | int rc = 0, used_dma = 0, found = 0; |
3adcebb2 | 3332 | |
a6d5a51c | 3333 | /* step 1: calculate xfer_mask */ |
f58229f8 | 3334 | ata_link_for_each_dev(dev, link) { |
7dc951ae | 3335 | unsigned long pio_mask, dma_mask; |
b3a70601 | 3336 | unsigned int mode_mask; |
a6d5a51c | 3337 | |
e1211e3f | 3338 | if (!ata_dev_enabled(dev)) |
a6d5a51c TH |
3339 | continue; |
3340 | ||
b3a70601 AC |
3341 | mode_mask = ATA_DMA_MASK_ATA; |
3342 | if (dev->class == ATA_DEV_ATAPI) | |
3343 | mode_mask = ATA_DMA_MASK_ATAPI; | |
3344 | else if (ata_id_is_cfa(dev->id)) | |
3345 | mode_mask = ATA_DMA_MASK_CFA; | |
3346 | ||
3373efd8 | 3347 | ata_dev_xfermask(dev); |
33267325 | 3348 | ata_force_xfermask(dev); |
1da177e4 | 3349 | |
acf356b1 TH |
3350 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
3351 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
b3a70601 AC |
3352 | |
3353 | if (libata_dma_mask & mode_mask) | |
3354 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
3355 | else | |
3356 | dma_mask = 0; | |
3357 | ||
acf356b1 TH |
3358 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); |
3359 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
5444a6f4 | 3360 | |
4f65977d | 3361 | found = 1; |
b15b3eba | 3362 | if (ata_dma_enabled(dev)) |
5444a6f4 | 3363 | used_dma = 1; |
a6d5a51c | 3364 | } |
4f65977d | 3365 | if (!found) |
e82cbdb9 | 3366 | goto out; |
a6d5a51c TH |
3367 | |
3368 | /* step 2: always set host PIO timings */ | |
f58229f8 | 3369 | ata_link_for_each_dev(dev, link) { |
e8e0619f TH |
3370 | if (!ata_dev_enabled(dev)) |
3371 | continue; | |
3372 | ||
70cd071e | 3373 | if (dev->pio_mode == 0xff) { |
f15a1daf | 3374 | ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); |
e8e0619f | 3375 | rc = -EINVAL; |
e82cbdb9 | 3376 | goto out; |
e8e0619f TH |
3377 | } |
3378 | ||
3379 | dev->xfer_mode = dev->pio_mode; | |
3380 | dev->xfer_shift = ATA_SHIFT_PIO; | |
3381 | if (ap->ops->set_piomode) | |
3382 | ap->ops->set_piomode(ap, dev); | |
3383 | } | |
1da177e4 | 3384 | |
a6d5a51c | 3385 | /* step 3: set host DMA timings */ |
f58229f8 | 3386 | ata_link_for_each_dev(dev, link) { |
b15b3eba | 3387 | if (!ata_dev_enabled(dev) || !ata_dma_enabled(dev)) |
e8e0619f TH |
3388 | continue; |
3389 | ||
3390 | dev->xfer_mode = dev->dma_mode; | |
3391 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
3392 | if (ap->ops->set_dmamode) | |
3393 | ap->ops->set_dmamode(ap, dev); | |
3394 | } | |
1da177e4 LT |
3395 | |
3396 | /* step 4: update devices' xfer mode */ | |
f58229f8 | 3397 | ata_link_for_each_dev(dev, link) { |
18d90deb | 3398 | /* don't update suspended devices' xfer mode */ |
9666f400 | 3399 | if (!ata_dev_enabled(dev)) |
83206a29 TH |
3400 | continue; |
3401 | ||
3373efd8 | 3402 | rc = ata_dev_set_mode(dev); |
5bbc53f4 | 3403 | if (rc) |
e82cbdb9 | 3404 | goto out; |
83206a29 | 3405 | } |
1da177e4 | 3406 | |
e8e0619f TH |
3407 | /* Record simplex status. If we selected DMA then the other |
3408 | * host channels are not permitted to do so. | |
5444a6f4 | 3409 | */ |
cca3974e | 3410 | if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
032af1ce | 3411 | ap->host->simplex_claimed = ap; |
5444a6f4 | 3412 | |
e82cbdb9 TH |
3413 | out: |
3414 | if (rc) | |
3415 | *r_failed_dev = dev; | |
3416 | return rc; | |
1da177e4 LT |
3417 | } |
3418 | ||
aa2731ad TH |
3419 | /** |
3420 | * ata_wait_ready - wait for link to become ready | |
3421 | * @link: link to be waited on | |
3422 | * @deadline: deadline jiffies for the operation | |
3423 | * @check_ready: callback to check link readiness | |
3424 | * | |
3425 | * Wait for @link to become ready. @check_ready should return | |
3426 | * positive number if @link is ready, 0 if it isn't, -ENODEV if | |
3427 | * link doesn't seem to be occupied, other errno for other error | |
3428 | * conditions. | |
3429 | * | |
3430 | * Transient -ENODEV conditions are allowed for | |
3431 | * ATA_TMOUT_FF_WAIT. | |
3432 | * | |
3433 | * LOCKING: | |
3434 | * EH context. | |
3435 | * | |
3436 | * RETURNS: | |
3437 | * 0 if @linke is ready before @deadline; otherwise, -errno. | |
3438 | */ | |
3439 | int ata_wait_ready(struct ata_link *link, unsigned long deadline, | |
3440 | int (*check_ready)(struct ata_link *link)) | |
3441 | { | |
3442 | unsigned long start = jiffies; | |
341c2c95 | 3443 | unsigned long nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT); |
aa2731ad TH |
3444 | int warned = 0; |
3445 | ||
b1c72916 TH |
3446 | /* Slave readiness can't be tested separately from master. On |
3447 | * M/S emulation configuration, this function should be called | |
3448 | * only on the master and it will handle both master and slave. | |
3449 | */ | |
3450 | WARN_ON(link == link->ap->slave_link); | |
3451 | ||
aa2731ad TH |
3452 | if (time_after(nodev_deadline, deadline)) |
3453 | nodev_deadline = deadline; | |
3454 | ||
3455 | while (1) { | |
3456 | unsigned long now = jiffies; | |
3457 | int ready, tmp; | |
3458 | ||
3459 | ready = tmp = check_ready(link); | |
3460 | if (ready > 0) | |
3461 | return 0; | |
3462 | ||
3463 | /* -ENODEV could be transient. Ignore -ENODEV if link | |
3464 | * is online. Also, some SATA devices take a long | |
3465 | * time to clear 0xff after reset. For example, | |
3466 | * HHD424020F7SV00 iVDR needs >= 800ms while Quantum | |
3467 | * GoVault needs even more than that. Wait for | |
3468 | * ATA_TMOUT_FF_WAIT on -ENODEV if link isn't offline. | |
3469 | * | |
3470 | * Note that some PATA controllers (pata_ali) explode | |
3471 | * if status register is read more than once when | |
3472 | * there's no device attached. | |
3473 | */ | |
3474 | if (ready == -ENODEV) { | |
3475 | if (ata_link_online(link)) | |
3476 | ready = 0; | |
3477 | else if ((link->ap->flags & ATA_FLAG_SATA) && | |
3478 | !ata_link_offline(link) && | |
3479 | time_before(now, nodev_deadline)) | |
3480 | ready = 0; | |
3481 | } | |
3482 | ||
3483 | if (ready) | |
3484 | return ready; | |
3485 | if (time_after(now, deadline)) | |
3486 | return -EBUSY; | |
3487 | ||
3488 | if (!warned && time_after(now, start + 5 * HZ) && | |
3489 | (deadline - now > 3 * HZ)) { | |
3490 | ata_link_printk(link, KERN_WARNING, | |
3491 | "link is slow to respond, please be patient " | |
3492 | "(ready=%d)\n", tmp); | |
3493 | warned = 1; | |
3494 | } | |
3495 | ||
3496 | msleep(50); | |
3497 | } | |
3498 | } | |
3499 | ||
3500 | /** | |
3501 | * ata_wait_after_reset - wait for link to become ready after reset | |
3502 | * @link: link to be waited on | |
3503 | * @deadline: deadline jiffies for the operation | |
3504 | * @check_ready: callback to check link readiness | |
3505 | * | |
3506 | * Wait for @link to become ready after reset. | |
3507 | * | |
3508 | * LOCKING: | |
3509 | * EH context. | |
3510 | * | |
3511 | * RETURNS: | |
3512 | * 0 if @linke is ready before @deadline; otherwise, -errno. | |
3513 | */ | |
2b4221bb | 3514 | int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, |
aa2731ad TH |
3515 | int (*check_ready)(struct ata_link *link)) |
3516 | { | |
341c2c95 | 3517 | msleep(ATA_WAIT_AFTER_RESET); |
aa2731ad TH |
3518 | |
3519 | return ata_wait_ready(link, deadline, check_ready); | |
3520 | } | |
3521 | ||
d7bb4cc7 | 3522 | /** |
936fd732 TH |
3523 | * sata_link_debounce - debounce SATA phy status |
3524 | * @link: ATA link to debounce SATA phy status for | |
d7bb4cc7 | 3525 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3526 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3527 | * |
936fd732 | 3528 | * Make sure SStatus of @link reaches stable state, determined by |
d7bb4cc7 TH |
3529 | * holding the same value where DET is not 1 for @duration polled |
3530 | * every @interval, before @timeout. Timeout constraints the | |
d4b2bab4 TH |
3531 | * beginning of the stable state. Because DET gets stuck at 1 on |
3532 | * some controllers after hot unplugging, this functions waits | |
d7bb4cc7 TH |
3533 | * until timeout then returns 0 if DET is stable at 1. |
3534 | * | |
d4b2bab4 TH |
3535 | * @timeout is further limited by @deadline. The sooner of the |
3536 | * two is used. | |
3537 | * | |
d7bb4cc7 TH |
3538 | * LOCKING: |
3539 | * Kernel thread context (may sleep) | |
3540 | * | |
3541 | * RETURNS: | |
3542 | * 0 on success, -errno on failure. | |
3543 | */ | |
936fd732 TH |
3544 | int sata_link_debounce(struct ata_link *link, const unsigned long *params, |
3545 | unsigned long deadline) | |
7a7921e8 | 3546 | { |
341c2c95 TH |
3547 | unsigned long interval = params[0]; |
3548 | unsigned long duration = params[1]; | |
d4b2bab4 | 3549 | unsigned long last_jiffies, t; |
d7bb4cc7 TH |
3550 | u32 last, cur; |
3551 | int rc; | |
3552 | ||
341c2c95 | 3553 | t = ata_deadline(jiffies, params[2]); |
d4b2bab4 TH |
3554 | if (time_before(t, deadline)) |
3555 | deadline = t; | |
3556 | ||
936fd732 | 3557 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3558 | return rc; |
3559 | cur &= 0xf; | |
3560 | ||
3561 | last = cur; | |
3562 | last_jiffies = jiffies; | |
3563 | ||
3564 | while (1) { | |
341c2c95 | 3565 | msleep(interval); |
936fd732 | 3566 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3567 | return rc; |
3568 | cur &= 0xf; | |
3569 | ||
3570 | /* DET stable? */ | |
3571 | if (cur == last) { | |
d4b2bab4 | 3572 | if (cur == 1 && time_before(jiffies, deadline)) |
d7bb4cc7 | 3573 | continue; |
341c2c95 TH |
3574 | if (time_after(jiffies, |
3575 | ata_deadline(last_jiffies, duration))) | |
d7bb4cc7 TH |
3576 | return 0; |
3577 | continue; | |
3578 | } | |
3579 | ||
3580 | /* unstable, start over */ | |
3581 | last = cur; | |
3582 | last_jiffies = jiffies; | |
3583 | ||
f1545154 TH |
3584 | /* Check deadline. If debouncing failed, return |
3585 | * -EPIPE to tell upper layer to lower link speed. | |
3586 | */ | |
d4b2bab4 | 3587 | if (time_after(jiffies, deadline)) |
f1545154 | 3588 | return -EPIPE; |
d7bb4cc7 TH |
3589 | } |
3590 | } | |
3591 | ||
3592 | /** | |
936fd732 TH |
3593 | * sata_link_resume - resume SATA link |
3594 | * @link: ATA link to resume SATA | |
d7bb4cc7 | 3595 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3596 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3597 | * |
936fd732 | 3598 | * Resume SATA phy @link and debounce it. |
d7bb4cc7 TH |
3599 | * |
3600 | * LOCKING: | |
3601 | * Kernel thread context (may sleep) | |
3602 | * | |
3603 | * RETURNS: | |
3604 | * 0 on success, -errno on failure. | |
3605 | */ | |
936fd732 TH |
3606 | int sata_link_resume(struct ata_link *link, const unsigned long *params, |
3607 | unsigned long deadline) | |
d7bb4cc7 | 3608 | { |
ac371987 | 3609 | u32 scontrol, serror; |
81952c54 TH |
3610 | int rc; |
3611 | ||
936fd732 | 3612 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 3613 | return rc; |
7a7921e8 | 3614 | |
852ee16a | 3615 | scontrol = (scontrol & 0x0f0) | 0x300; |
81952c54 | 3616 | |
936fd732 | 3617 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 | 3618 | return rc; |
7a7921e8 | 3619 | |
d7bb4cc7 TH |
3620 | /* Some PHYs react badly if SStatus is pounded immediately |
3621 | * after resuming. Delay 200ms before debouncing. | |
3622 | */ | |
3623 | msleep(200); | |
7a7921e8 | 3624 | |
ac371987 TH |
3625 | if ((rc = sata_link_debounce(link, params, deadline))) |
3626 | return rc; | |
3627 | ||
f046519f | 3628 | /* clear SError, some PHYs require this even for SRST to work */ |
ac371987 TH |
3629 | if (!(rc = sata_scr_read(link, SCR_ERROR, &serror))) |
3630 | rc = sata_scr_write(link, SCR_ERROR, serror); | |
ac371987 | 3631 | |
f046519f | 3632 | return rc != -EINVAL ? rc : 0; |
7a7921e8 TH |
3633 | } |
3634 | ||
f5914a46 | 3635 | /** |
0aa1113d | 3636 | * ata_std_prereset - prepare for reset |
cc0680a5 | 3637 | * @link: ATA link to be reset |
d4b2bab4 | 3638 | * @deadline: deadline jiffies for the operation |
f5914a46 | 3639 | * |
cc0680a5 | 3640 | * @link is about to be reset. Initialize it. Failure from |
b8cffc6a TH |
3641 | * prereset makes libata abort whole reset sequence and give up |
3642 | * that port, so prereset should be best-effort. It does its | |
3643 | * best to prepare for reset sequence but if things go wrong, it | |
3644 | * should just whine, not fail. | |
f5914a46 TH |
3645 | * |
3646 | * LOCKING: | |
3647 | * Kernel thread context (may sleep) | |
3648 | * | |
3649 | * RETURNS: | |
3650 | * 0 on success, -errno otherwise. | |
3651 | */ | |
0aa1113d | 3652 | int ata_std_prereset(struct ata_link *link, unsigned long deadline) |
f5914a46 | 3653 | { |
cc0680a5 | 3654 | struct ata_port *ap = link->ap; |
936fd732 | 3655 | struct ata_eh_context *ehc = &link->eh_context; |
e9c83914 | 3656 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
f5914a46 TH |
3657 | int rc; |
3658 | ||
f5914a46 TH |
3659 | /* if we're about to do hardreset, nothing more to do */ |
3660 | if (ehc->i.action & ATA_EH_HARDRESET) | |
3661 | return 0; | |
3662 | ||
936fd732 | 3663 | /* if SATA, resume link */ |
a16abc0b | 3664 | if (ap->flags & ATA_FLAG_SATA) { |
936fd732 | 3665 | rc = sata_link_resume(link, timing, deadline); |
b8cffc6a TH |
3666 | /* whine about phy resume failure but proceed */ |
3667 | if (rc && rc != -EOPNOTSUPP) | |
cc0680a5 | 3668 | ata_link_printk(link, KERN_WARNING, "failed to resume " |
f5914a46 | 3669 | "link for reset (errno=%d)\n", rc); |
f5914a46 TH |
3670 | } |
3671 | ||
45db2f6c | 3672 | /* no point in trying softreset on offline link */ |
b1c72916 | 3673 | if (ata_phys_link_offline(link)) |
45db2f6c TH |
3674 | ehc->i.action &= ~ATA_EH_SOFTRESET; |
3675 | ||
f5914a46 TH |
3676 | return 0; |
3677 | } | |
3678 | ||
c2bd5804 | 3679 | /** |
624d5c51 TH |
3680 | * sata_link_hardreset - reset link via SATA phy reset |
3681 | * @link: link to reset | |
3682 | * @timing: timing parameters { interval, duratinon, timeout } in msec | |
d4b2bab4 | 3683 | * @deadline: deadline jiffies for the operation |
9dadd45b TH |
3684 | * @online: optional out parameter indicating link onlineness |
3685 | * @check_ready: optional callback to check link readiness | |
c2bd5804 | 3686 | * |
624d5c51 | 3687 | * SATA phy-reset @link using DET bits of SControl register. |
9dadd45b TH |
3688 | * After hardreset, link readiness is waited upon using |
3689 | * ata_wait_ready() if @check_ready is specified. LLDs are | |
3690 | * allowed to not specify @check_ready and wait itself after this | |
3691 | * function returns. Device classification is LLD's | |
3692 | * responsibility. | |
3693 | * | |
3694 | * *@online is set to one iff reset succeeded and @link is online | |
3695 | * after reset. | |
c2bd5804 TH |
3696 | * |
3697 | * LOCKING: | |
3698 | * Kernel thread context (may sleep) | |
3699 | * | |
3700 | * RETURNS: | |
3701 | * 0 on success, -errno otherwise. | |
3702 | */ | |
624d5c51 | 3703 | int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, |
9dadd45b TH |
3704 | unsigned long deadline, |
3705 | bool *online, int (*check_ready)(struct ata_link *)) | |
c2bd5804 | 3706 | { |
624d5c51 | 3707 | u32 scontrol; |
81952c54 | 3708 | int rc; |
852ee16a | 3709 | |
c2bd5804 TH |
3710 | DPRINTK("ENTER\n"); |
3711 | ||
9dadd45b TH |
3712 | if (online) |
3713 | *online = false; | |
3714 | ||
936fd732 | 3715 | if (sata_set_spd_needed(link)) { |
1c3fae4d TH |
3716 | /* SATA spec says nothing about how to reconfigure |
3717 | * spd. To be on the safe side, turn off phy during | |
3718 | * reconfiguration. This works for at least ICH7 AHCI | |
3719 | * and Sil3124. | |
3720 | */ | |
936fd732 | 3721 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 3722 | goto out; |
81952c54 | 3723 | |
a34b6fc0 | 3724 | scontrol = (scontrol & 0x0f0) | 0x304; |
81952c54 | 3725 | |
936fd732 | 3726 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
b6103f6d | 3727 | goto out; |
1c3fae4d | 3728 | |
936fd732 | 3729 | sata_set_spd(link); |
1c3fae4d TH |
3730 | } |
3731 | ||
3732 | /* issue phy wake/reset */ | |
936fd732 | 3733 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 3734 | goto out; |
81952c54 | 3735 | |
852ee16a | 3736 | scontrol = (scontrol & 0x0f0) | 0x301; |
81952c54 | 3737 | |
936fd732 | 3738 | if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) |
b6103f6d | 3739 | goto out; |
c2bd5804 | 3740 | |
1c3fae4d | 3741 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
c2bd5804 TH |
3742 | * 10.4.2 says at least 1 ms. |
3743 | */ | |
3744 | msleep(1); | |
3745 | ||
936fd732 TH |
3746 | /* bring link back */ |
3747 | rc = sata_link_resume(link, timing, deadline); | |
9dadd45b TH |
3748 | if (rc) |
3749 | goto out; | |
3750 | /* if link is offline nothing more to do */ | |
b1c72916 | 3751 | if (ata_phys_link_offline(link)) |
9dadd45b TH |
3752 | goto out; |
3753 | ||
3754 | /* Link is online. From this point, -ENODEV too is an error. */ | |
3755 | if (online) | |
3756 | *online = true; | |
3757 | ||
071f44b1 | 3758 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) { |
9dadd45b TH |
3759 | /* If PMP is supported, we have to do follow-up SRST. |
3760 | * Some PMPs don't send D2H Reg FIS after hardreset if | |
3761 | * the first port is empty. Wait only for | |
3762 | * ATA_TMOUT_PMP_SRST_WAIT. | |
3763 | */ | |
3764 | if (check_ready) { | |
3765 | unsigned long pmp_deadline; | |
3766 | ||
341c2c95 TH |
3767 | pmp_deadline = ata_deadline(jiffies, |
3768 | ATA_TMOUT_PMP_SRST_WAIT); | |
9dadd45b TH |
3769 | if (time_after(pmp_deadline, deadline)) |
3770 | pmp_deadline = deadline; | |
3771 | ata_wait_ready(link, pmp_deadline, check_ready); | |
3772 | } | |
3773 | rc = -EAGAIN; | |
3774 | goto out; | |
3775 | } | |
3776 | ||
3777 | rc = 0; | |
3778 | if (check_ready) | |
3779 | rc = ata_wait_ready(link, deadline, check_ready); | |
b6103f6d | 3780 | out: |
0cbf0711 TH |
3781 | if (rc && rc != -EAGAIN) { |
3782 | /* online is set iff link is online && reset succeeded */ | |
3783 | if (online) | |
3784 | *online = false; | |
9dadd45b TH |
3785 | ata_link_printk(link, KERN_ERR, |
3786 | "COMRESET failed (errno=%d)\n", rc); | |
0cbf0711 | 3787 | } |
b6103f6d TH |
3788 | DPRINTK("EXIT, rc=%d\n", rc); |
3789 | return rc; | |
3790 | } | |
3791 | ||
57c9efdf TH |
3792 | /** |
3793 | * sata_std_hardreset - COMRESET w/o waiting or classification | |
3794 | * @link: link to reset | |
3795 | * @class: resulting class of attached device | |
3796 | * @deadline: deadline jiffies for the operation | |
3797 | * | |
3798 | * Standard SATA COMRESET w/o waiting or classification. | |
3799 | * | |
3800 | * LOCKING: | |
3801 | * Kernel thread context (may sleep) | |
3802 | * | |
3803 | * RETURNS: | |
3804 | * 0 if link offline, -EAGAIN if link online, -errno on errors. | |
3805 | */ | |
3806 | int sata_std_hardreset(struct ata_link *link, unsigned int *class, | |
3807 | unsigned long deadline) | |
3808 | { | |
3809 | const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); | |
3810 | bool online; | |
3811 | int rc; | |
3812 | ||
3813 | /* do hardreset */ | |
3814 | rc = sata_link_hardreset(link, timing, deadline, &online, NULL); | |
57c9efdf TH |
3815 | return online ? -EAGAIN : rc; |
3816 | } | |
3817 | ||
c2bd5804 | 3818 | /** |
203c75b8 | 3819 | * ata_std_postreset - standard postreset callback |
cc0680a5 | 3820 | * @link: the target ata_link |
c2bd5804 TH |
3821 | * @classes: classes of attached devices |
3822 | * | |
3823 | * This function is invoked after a successful reset. Note that | |
3824 | * the device might have been reset more than once using | |
3825 | * different reset methods before postreset is invoked. | |
c2bd5804 | 3826 | * |
c2bd5804 TH |
3827 | * LOCKING: |
3828 | * Kernel thread context (may sleep) | |
3829 | */ | |
203c75b8 | 3830 | void ata_std_postreset(struct ata_link *link, unsigned int *classes) |
c2bd5804 | 3831 | { |
f046519f TH |
3832 | u32 serror; |
3833 | ||
c2bd5804 TH |
3834 | DPRINTK("ENTER\n"); |
3835 | ||
f046519f TH |
3836 | /* reset complete, clear SError */ |
3837 | if (!sata_scr_read(link, SCR_ERROR, &serror)) | |
3838 | sata_scr_write(link, SCR_ERROR, serror); | |
3839 | ||
c2bd5804 | 3840 | /* print link status */ |
936fd732 | 3841 | sata_print_link_status(link); |
c2bd5804 | 3842 | |
c2bd5804 TH |
3843 | DPRINTK("EXIT\n"); |
3844 | } | |
3845 | ||
623a3128 TH |
3846 | /** |
3847 | * ata_dev_same_device - Determine whether new ID matches configured device | |
623a3128 TH |
3848 | * @dev: device to compare against |
3849 | * @new_class: class of the new device | |
3850 | * @new_id: IDENTIFY page of the new device | |
3851 | * | |
3852 | * Compare @new_class and @new_id against @dev and determine | |
3853 | * whether @dev is the device indicated by @new_class and | |
3854 | * @new_id. | |
3855 | * | |
3856 | * LOCKING: | |
3857 | * None. | |
3858 | * | |
3859 | * RETURNS: | |
3860 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
3861 | */ | |
3373efd8 TH |
3862 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
3863 | const u16 *new_id) | |
623a3128 TH |
3864 | { |
3865 | const u16 *old_id = dev->id; | |
a0cf733b TH |
3866 | unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
3867 | unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; | |
623a3128 TH |
3868 | |
3869 | if (dev->class != new_class) { | |
f15a1daf TH |
3870 | ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", |
3871 | dev->class, new_class); | |
623a3128 TH |
3872 | return 0; |
3873 | } | |
3874 | ||
a0cf733b TH |
3875 | ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
3876 | ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); | |
3877 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); | |
3878 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); | |
623a3128 TH |
3879 | |
3880 | if (strcmp(model[0], model[1])) { | |
f15a1daf TH |
3881 | ata_dev_printk(dev, KERN_INFO, "model number mismatch " |
3882 | "'%s' != '%s'\n", model[0], model[1]); | |
623a3128 TH |
3883 | return 0; |
3884 | } | |
3885 | ||
3886 | if (strcmp(serial[0], serial[1])) { | |
f15a1daf TH |
3887 | ata_dev_printk(dev, KERN_INFO, "serial number mismatch " |
3888 | "'%s' != '%s'\n", serial[0], serial[1]); | |
623a3128 TH |
3889 | return 0; |
3890 | } | |
3891 | ||
623a3128 TH |
3892 | return 1; |
3893 | } | |
3894 | ||
3895 | /** | |
fe30911b | 3896 | * ata_dev_reread_id - Re-read IDENTIFY data |
3fae450c | 3897 | * @dev: target ATA device |
bff04647 | 3898 | * @readid_flags: read ID flags |
623a3128 TH |
3899 | * |
3900 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
3901 | * the port. | |
3902 | * | |
3903 | * LOCKING: | |
3904 | * Kernel thread context (may sleep) | |
3905 | * | |
3906 | * RETURNS: | |
3907 | * 0 on success, negative errno otherwise | |
3908 | */ | |
fe30911b | 3909 | int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) |
623a3128 | 3910 | { |
5eb45c02 | 3911 | unsigned int class = dev->class; |
9af5c9c9 | 3912 | u16 *id = (void *)dev->link->ap->sector_buf; |
623a3128 TH |
3913 | int rc; |
3914 | ||
fe635c7e | 3915 | /* read ID data */ |
bff04647 | 3916 | rc = ata_dev_read_id(dev, &class, readid_flags, id); |
623a3128 | 3917 | if (rc) |
fe30911b | 3918 | return rc; |
623a3128 TH |
3919 | |
3920 | /* is the device still there? */ | |
fe30911b TH |
3921 | if (!ata_dev_same_device(dev, class, id)) |
3922 | return -ENODEV; | |
623a3128 | 3923 | |
fe635c7e | 3924 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
fe30911b TH |
3925 | return 0; |
3926 | } | |
3927 | ||
3928 | /** | |
3929 | * ata_dev_revalidate - Revalidate ATA device | |
3930 | * @dev: device to revalidate | |
422c9daa | 3931 | * @new_class: new class code |
fe30911b TH |
3932 | * @readid_flags: read ID flags |
3933 | * | |
3934 | * Re-read IDENTIFY page, make sure @dev is still attached to the | |
3935 | * port and reconfigure it according to the new IDENTIFY page. | |
3936 | * | |
3937 | * LOCKING: | |
3938 | * Kernel thread context (may sleep) | |
3939 | * | |
3940 | * RETURNS: | |
3941 | * 0 on success, negative errno otherwise | |
3942 | */ | |
422c9daa TH |
3943 | int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, |
3944 | unsigned int readid_flags) | |
fe30911b | 3945 | { |
6ddcd3b0 | 3946 | u64 n_sectors = dev->n_sectors; |
fe30911b TH |
3947 | int rc; |
3948 | ||
3949 | if (!ata_dev_enabled(dev)) | |
3950 | return -ENODEV; | |
3951 | ||
422c9daa TH |
3952 | /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ |
3953 | if (ata_class_enabled(new_class) && | |
3954 | new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) { | |
3955 | ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n", | |
3956 | dev->class, new_class); | |
3957 | rc = -ENODEV; | |
3958 | goto fail; | |
3959 | } | |
3960 | ||
fe30911b TH |
3961 | /* re-read ID */ |
3962 | rc = ata_dev_reread_id(dev, readid_flags); | |
3963 | if (rc) | |
3964 | goto fail; | |
623a3128 TH |
3965 | |
3966 | /* configure device according to the new ID */ | |
efdaedc4 | 3967 | rc = ata_dev_configure(dev); |
6ddcd3b0 TH |
3968 | if (rc) |
3969 | goto fail; | |
3970 | ||
3971 | /* verify n_sectors hasn't changed */ | |
b54eebd6 TH |
3972 | if (dev->class == ATA_DEV_ATA && n_sectors && |
3973 | dev->n_sectors != n_sectors) { | |
6ddcd3b0 TH |
3974 | ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " |
3975 | "%llu != %llu\n", | |
3976 | (unsigned long long)n_sectors, | |
3977 | (unsigned long long)dev->n_sectors); | |
8270bec4 TH |
3978 | |
3979 | /* restore original n_sectors */ | |
3980 | dev->n_sectors = n_sectors; | |
3981 | ||
6ddcd3b0 TH |
3982 | rc = -ENODEV; |
3983 | goto fail; | |
3984 | } | |
3985 | ||
3986 | return 0; | |
623a3128 TH |
3987 | |
3988 | fail: | |
f15a1daf | 3989 | ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); |
623a3128 TH |
3990 | return rc; |
3991 | } | |
3992 | ||
6919a0a6 AC |
3993 | struct ata_blacklist_entry { |
3994 | const char *model_num; | |
3995 | const char *model_rev; | |
3996 | unsigned long horkage; | |
3997 | }; | |
3998 | ||
3999 | static const struct ata_blacklist_entry ata_device_blacklist [] = { | |
4000 | /* Devices with DMA related problems under Linux */ | |
4001 | { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, | |
4002 | { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, | |
4003 | { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, | |
4004 | { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, | |
4005 | { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, | |
4006 | { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, | |
4007 | { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, | |
4008 | { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, | |
4009 | { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, | |
4010 | { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, | |
4011 | { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, | |
4012 | { "CRD-84", NULL, ATA_HORKAGE_NODMA }, | |
4013 | { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, | |
4014 | { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, | |
4015 | { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, | |
4016 | { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, | |
4017 | { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, | |
4018 | { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, | |
4019 | { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, | |
4020 | { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, | |
4021 | { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, | |
4022 | { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, | |
4023 | { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, | |
4024 | { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, | |
4025 | { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, | |
4026 | { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, | |
6919a0a6 AC |
4027 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
4028 | { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, | |
2dcb407e | 4029 | { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA }, |
39f19886 | 4030 | { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, |
3af9a77a | 4031 | /* Odd clown on sil3726/4726 PMPs */ |
50af2fa1 | 4032 | { "Config Disk", NULL, ATA_HORKAGE_DISABLE }, |
6919a0a6 | 4033 | |
18d6e9d5 | 4034 | /* Weird ATAPI devices */ |
40a1d531 | 4035 | { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, |
6a87e42e | 4036 | { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA }, |
18d6e9d5 | 4037 | |
6919a0a6 AC |
4038 | /* Devices we expect to fail diagnostics */ |
4039 | ||
4040 | /* Devices where NCQ should be avoided */ | |
4041 | /* NCQ is slow */ | |
2dcb407e | 4042 | { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, |
459ad688 | 4043 | { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, |
09125ea6 TH |
4044 | /* http://thread.gmane.org/gmane.linux.ide/14907 */ |
4045 | { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, | |
7acfaf30 | 4046 | /* NCQ is broken */ |
539cc7c7 | 4047 | { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, |
0e3dbc01 | 4048 | { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, |
da6f0ec2 | 4049 | { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, |
e41bd3e8 | 4050 | { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ }, |
539cc7c7 | 4051 | |
ac70a964 TH |
4052 | /* Seagate NCQ + FLUSH CACHE firmware bug */ |
4053 | { "ST31500341AS", "9JU138", ATA_HORKAGE_NONCQ | | |
4054 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4055 | { "ST31000333AS", "9FZ136", ATA_HORKAGE_NONCQ | | |
4056 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4057 | { "ST3640623AS", "9FZ164", ATA_HORKAGE_NONCQ | | |
4058 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4059 | { "ST3640323AS", "9FZ134", ATA_HORKAGE_NONCQ | | |
4060 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4061 | { "ST3320813AS", "9FZ182", ATA_HORKAGE_NONCQ | | |
4062 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4063 | { "ST3320613AS", "9FZ162", ATA_HORKAGE_NONCQ | | |
4064 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4065 | ||
36e337d0 RH |
4066 | /* Blacklist entries taken from Silicon Image 3124/3132 |
4067 | Windows driver .inf file - also several Linux problem reports */ | |
4068 | { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, | |
4069 | { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, | |
4070 | { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, | |
6919a0a6 | 4071 | |
16c55b03 TH |
4072 | /* devices which puke on READ_NATIVE_MAX */ |
4073 | { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, | |
4074 | { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, | |
4075 | { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, | |
4076 | { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, | |
6919a0a6 | 4077 | |
93328e11 AC |
4078 | /* Devices which report 1 sector over size HPA */ |
4079 | { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
4080 | { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
b152fcd3 | 4081 | { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, }, |
93328e11 | 4082 | |
6bbfd53d AC |
4083 | /* Devices which get the IVB wrong */ |
4084 | { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, }, | |
a79067e5 AC |
4085 | /* Maybe we should just blacklist TSSTcorp... */ |
4086 | { "TSSTcorp CDDVDW SH-S202H", "SB00", ATA_HORKAGE_IVB, }, | |
4087 | { "TSSTcorp CDDVDW SH-S202H", "SB01", ATA_HORKAGE_IVB, }, | |
6bbfd53d | 4088 | { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, }, |
e9f33406 PM |
4089 | { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, }, |
4090 | { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, }, | |
4091 | { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, }, | |
6bbfd53d | 4092 | |
9ce8e307 JA |
4093 | /* Devices that do not need bridging limits applied */ |
4094 | { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, }, | |
4095 | ||
6919a0a6 AC |
4096 | /* End Marker */ |
4097 | { } | |
1da177e4 | 4098 | }; |
2e9edbf8 | 4099 | |
741b7763 | 4100 | static int strn_pattern_cmp(const char *patt, const char *name, int wildchar) |
539cc7c7 JG |
4101 | { |
4102 | const char *p; | |
4103 | int len; | |
4104 | ||
4105 | /* | |
4106 | * check for trailing wildcard: *\0 | |
4107 | */ | |
4108 | p = strchr(patt, wildchar); | |
4109 | if (p && ((*(p + 1)) == 0)) | |
4110 | len = p - patt; | |
317b50b8 | 4111 | else { |
539cc7c7 | 4112 | len = strlen(name); |
317b50b8 AP |
4113 | if (!len) { |
4114 | if (!*patt) | |
4115 | return 0; | |
4116 | return -1; | |
4117 | } | |
4118 | } | |
539cc7c7 JG |
4119 | |
4120 | return strncmp(patt, name, len); | |
4121 | } | |
4122 | ||
75683fe7 | 4123 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev) |
1da177e4 | 4124 | { |
8bfa79fc TH |
4125 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
4126 | unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; | |
6919a0a6 | 4127 | const struct ata_blacklist_entry *ad = ata_device_blacklist; |
3a778275 | 4128 | |
8bfa79fc TH |
4129 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
4130 | ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); | |
1da177e4 | 4131 | |
6919a0a6 | 4132 | while (ad->model_num) { |
539cc7c7 | 4133 | if (!strn_pattern_cmp(ad->model_num, model_num, '*')) { |
6919a0a6 AC |
4134 | if (ad->model_rev == NULL) |
4135 | return ad->horkage; | |
539cc7c7 | 4136 | if (!strn_pattern_cmp(ad->model_rev, model_rev, '*')) |
6919a0a6 | 4137 | return ad->horkage; |
f4b15fef | 4138 | } |
6919a0a6 | 4139 | ad++; |
f4b15fef | 4140 | } |
1da177e4 LT |
4141 | return 0; |
4142 | } | |
4143 | ||
6919a0a6 AC |
4144 | static int ata_dma_blacklisted(const struct ata_device *dev) |
4145 | { | |
4146 | /* We don't support polling DMA. | |
4147 | * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) | |
4148 | * if the LLDD handles only interrupts in the HSM_ST_LAST state. | |
4149 | */ | |
9af5c9c9 | 4150 | if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && |
6919a0a6 AC |
4151 | (dev->flags & ATA_DFLAG_CDB_INTR)) |
4152 | return 1; | |
75683fe7 | 4153 | return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; |
6919a0a6 AC |
4154 | } |
4155 | ||
6bbfd53d AC |
4156 | /** |
4157 | * ata_is_40wire - check drive side detection | |
4158 | * @dev: device | |
4159 | * | |
4160 | * Perform drive side detection decoding, allowing for device vendors | |
4161 | * who can't follow the documentation. | |
4162 | */ | |
4163 | ||
4164 | static int ata_is_40wire(struct ata_device *dev) | |
4165 | { | |
4166 | if (dev->horkage & ATA_HORKAGE_IVB) | |
4167 | return ata_drive_40wire_relaxed(dev->id); | |
4168 | return ata_drive_40wire(dev->id); | |
4169 | } | |
4170 | ||
15a5551c AC |
4171 | /** |
4172 | * cable_is_40wire - 40/80/SATA decider | |
4173 | * @ap: port to consider | |
4174 | * | |
4175 | * This function encapsulates the policy for speed management | |
4176 | * in one place. At the moment we don't cache the result but | |
4177 | * there is a good case for setting ap->cbl to the result when | |
4178 | * we are called with unknown cables (and figuring out if it | |
4179 | * impacts hotplug at all). | |
4180 | * | |
4181 | * Return 1 if the cable appears to be 40 wire. | |
4182 | */ | |
4183 | ||
4184 | static int cable_is_40wire(struct ata_port *ap) | |
4185 | { | |
4186 | struct ata_link *link; | |
4187 | struct ata_device *dev; | |
4188 | ||
4a9c7b33 | 4189 | /* If the controller thinks we are 40 wire, we are. */ |
15a5551c AC |
4190 | if (ap->cbl == ATA_CBL_PATA40) |
4191 | return 1; | |
4a9c7b33 TH |
4192 | |
4193 | /* If the controller thinks we are 80 wire, we are. */ | |
15a5551c AC |
4194 | if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA) |
4195 | return 0; | |
4a9c7b33 TH |
4196 | |
4197 | /* If the system is known to be 40 wire short cable (eg | |
4198 | * laptop), then we allow 80 wire modes even if the drive | |
4199 | * isn't sure. | |
4200 | */ | |
f792068e AC |
4201 | if (ap->cbl == ATA_CBL_PATA40_SHORT) |
4202 | return 0; | |
4a9c7b33 TH |
4203 | |
4204 | /* If the controller doesn't know, we scan. | |
4205 | * | |
4206 | * Note: We look for all 40 wire detects at this point. Any | |
4207 | * 80 wire detect is taken to be 80 wire cable because | |
4208 | * - in many setups only the one drive (slave if present) will | |
4209 | * give a valid detect | |
4210 | * - if you have a non detect capable drive you don't want it | |
4211 | * to colour the choice | |
4212 | */ | |
15a5551c AC |
4213 | ata_port_for_each_link(link, ap) { |
4214 | ata_link_for_each_dev(dev, link) { | |
4a9c7b33 | 4215 | if (ata_dev_enabled(dev) && !ata_is_40wire(dev)) |
15a5551c AC |
4216 | return 0; |
4217 | } | |
4218 | } | |
4219 | return 1; | |
4220 | } | |
4221 | ||
a6d5a51c TH |
4222 | /** |
4223 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
a6d5a51c TH |
4224 | * @dev: Device to compute xfermask for |
4225 | * | |
acf356b1 TH |
4226 | * Compute supported xfermask of @dev and store it in |
4227 | * dev->*_mask. This function is responsible for applying all | |
4228 | * known limits including host controller limits, device | |
4229 | * blacklist, etc... | |
a6d5a51c TH |
4230 | * |
4231 | * LOCKING: | |
4232 | * None. | |
a6d5a51c | 4233 | */ |
3373efd8 | 4234 | static void ata_dev_xfermask(struct ata_device *dev) |
1da177e4 | 4235 | { |
9af5c9c9 TH |
4236 | struct ata_link *link = dev->link; |
4237 | struct ata_port *ap = link->ap; | |
cca3974e | 4238 | struct ata_host *host = ap->host; |
a6d5a51c | 4239 | unsigned long xfer_mask; |
1da177e4 | 4240 | |
37deecb5 | 4241 | /* controller modes available */ |
565083e1 TH |
4242 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
4243 | ap->mwdma_mask, ap->udma_mask); | |
4244 | ||
8343f889 | 4245 | /* drive modes available */ |
37deecb5 TH |
4246 | xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
4247 | dev->mwdma_mask, dev->udma_mask); | |
4248 | xfer_mask &= ata_id_xfermask(dev->id); | |
565083e1 | 4249 | |
b352e57d AC |
4250 | /* |
4251 | * CFA Advanced TrueIDE timings are not allowed on a shared | |
4252 | * cable | |
4253 | */ | |
4254 | if (ata_dev_pair(dev)) { | |
4255 | /* No PIO5 or PIO6 */ | |
4256 | xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); | |
4257 | /* No MWDMA3 or MWDMA 4 */ | |
4258 | xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); | |
4259 | } | |
4260 | ||
37deecb5 TH |
4261 | if (ata_dma_blacklisted(dev)) { |
4262 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
f15a1daf TH |
4263 | ata_dev_printk(dev, KERN_WARNING, |
4264 | "device is on DMA blacklist, disabling DMA\n"); | |
37deecb5 | 4265 | } |
a6d5a51c | 4266 | |
14d66ab7 | 4267 | if ((host->flags & ATA_HOST_SIMPLEX) && |
2dcb407e | 4268 | host->simplex_claimed && host->simplex_claimed != ap) { |
37deecb5 TH |
4269 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
4270 | ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " | |
4271 | "other device, disabling DMA\n"); | |
5444a6f4 | 4272 | } |
565083e1 | 4273 | |
e424675f JG |
4274 | if (ap->flags & ATA_FLAG_NO_IORDY) |
4275 | xfer_mask &= ata_pio_mask_no_iordy(dev); | |
4276 | ||
5444a6f4 | 4277 | if (ap->ops->mode_filter) |
a76b62ca | 4278 | xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
5444a6f4 | 4279 | |
8343f889 RH |
4280 | /* Apply cable rule here. Don't apply it early because when |
4281 | * we handle hot plug the cable type can itself change. | |
4282 | * Check this last so that we know if the transfer rate was | |
4283 | * solely limited by the cable. | |
4284 | * Unknown or 80 wire cables reported host side are checked | |
4285 | * drive side as well. Cases where we know a 40wire cable | |
4286 | * is used safely for 80 are not checked here. | |
4287 | */ | |
4288 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) | |
4289 | /* UDMA/44 or higher would be available */ | |
15a5551c | 4290 | if (cable_is_40wire(ap)) { |
2dcb407e | 4291 | ata_dev_printk(dev, KERN_WARNING, |
8343f889 RH |
4292 | "limited to UDMA/33 due to 40-wire cable\n"); |
4293 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); | |
4294 | } | |
4295 | ||
565083e1 TH |
4296 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
4297 | &dev->mwdma_mask, &dev->udma_mask); | |
1da177e4 LT |
4298 | } |
4299 | ||
1da177e4 LT |
4300 | /** |
4301 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
1da177e4 LT |
4302 | * @dev: Device to which command will be sent |
4303 | * | |
780a87f7 JG |
4304 | * Issue SET FEATURES - XFER MODE command to device @dev |
4305 | * on port @ap. | |
4306 | * | |
1da177e4 | 4307 | * LOCKING: |
0cba632b | 4308 | * PCI/etc. bus probe sem. |
83206a29 TH |
4309 | * |
4310 | * RETURNS: | |
4311 | * 0 on success, AC_ERR_* mask otherwise. | |
1da177e4 LT |
4312 | */ |
4313 | ||
3373efd8 | 4314 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
1da177e4 | 4315 | { |
a0123703 | 4316 | struct ata_taskfile tf; |
83206a29 | 4317 | unsigned int err_mask; |
1da177e4 LT |
4318 | |
4319 | /* set up set-features taskfile */ | |
4320 | DPRINTK("set features - xfer mode\n"); | |
4321 | ||
464cf177 TH |
4322 | /* Some controllers and ATAPI devices show flaky interrupt |
4323 | * behavior after setting xfer mode. Use polling instead. | |
4324 | */ | |
3373efd8 | 4325 | ata_tf_init(dev, &tf); |
a0123703 TH |
4326 | tf.command = ATA_CMD_SET_FEATURES; |
4327 | tf.feature = SETFEATURES_XFER; | |
464cf177 | 4328 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; |
a0123703 | 4329 | tf.protocol = ATA_PROT_NODATA; |
b9f8ab2d | 4330 | /* If we are using IORDY we must send the mode setting command */ |
11b7becc JG |
4331 | if (ata_pio_need_iordy(dev)) |
4332 | tf.nsect = dev->xfer_mode; | |
b9f8ab2d AC |
4333 | /* If the device has IORDY and the controller does not - turn it off */ |
4334 | else if (ata_id_has_iordy(dev->id)) | |
11b7becc | 4335 | tf.nsect = 0x01; |
b9f8ab2d AC |
4336 | else /* In the ancient relic department - skip all of this */ |
4337 | return 0; | |
1da177e4 | 4338 | |
2b789108 | 4339 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
9f45cbd3 KCA |
4340 | |
4341 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
4342 | return err_mask; | |
4343 | } | |
9f45cbd3 | 4344 | /** |
218f3d30 | 4345 | * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES |
9f45cbd3 KCA |
4346 | * @dev: Device to which command will be sent |
4347 | * @enable: Whether to enable or disable the feature | |
218f3d30 | 4348 | * @feature: The sector count represents the feature to set |
9f45cbd3 KCA |
4349 | * |
4350 | * Issue SET FEATURES - SATA FEATURES command to device @dev | |
218f3d30 | 4351 | * on port @ap with sector count |
9f45cbd3 KCA |
4352 | * |
4353 | * LOCKING: | |
4354 | * PCI/etc. bus probe sem. | |
4355 | * | |
4356 | * RETURNS: | |
4357 | * 0 on success, AC_ERR_* mask otherwise. | |
4358 | */ | |
218f3d30 JG |
4359 | static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, |
4360 | u8 feature) | |
9f45cbd3 KCA |
4361 | { |
4362 | struct ata_taskfile tf; | |
4363 | unsigned int err_mask; | |
4364 | ||
4365 | /* set up set-features taskfile */ | |
4366 | DPRINTK("set features - SATA features\n"); | |
4367 | ||
4368 | ata_tf_init(dev, &tf); | |
4369 | tf.command = ATA_CMD_SET_FEATURES; | |
4370 | tf.feature = enable; | |
4371 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4372 | tf.protocol = ATA_PROT_NODATA; | |
218f3d30 | 4373 | tf.nsect = feature; |
9f45cbd3 | 4374 | |
2b789108 | 4375 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
1da177e4 | 4376 | |
83206a29 TH |
4377 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4378 | return err_mask; | |
1da177e4 LT |
4379 | } |
4380 | ||
8bf62ece AL |
4381 | /** |
4382 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
8bf62ece | 4383 | * @dev: Device to which command will be sent |
e2a7f77a RD |
4384 | * @heads: Number of heads (taskfile parameter) |
4385 | * @sectors: Number of sectors (taskfile parameter) | |
8bf62ece AL |
4386 | * |
4387 | * LOCKING: | |
6aff8f1f TH |
4388 | * Kernel thread context (may sleep) |
4389 | * | |
4390 | * RETURNS: | |
4391 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece | 4392 | */ |
3373efd8 TH |
4393 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
4394 | u16 heads, u16 sectors) | |
8bf62ece | 4395 | { |
a0123703 | 4396 | struct ata_taskfile tf; |
6aff8f1f | 4397 | unsigned int err_mask; |
8bf62ece AL |
4398 | |
4399 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
4400 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
00b6f5e9 | 4401 | return AC_ERR_INVALID; |
8bf62ece AL |
4402 | |
4403 | /* set up init dev params taskfile */ | |
4404 | DPRINTK("init dev params \n"); | |
4405 | ||
3373efd8 | 4406 | ata_tf_init(dev, &tf); |
a0123703 TH |
4407 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
4408 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4409 | tf.protocol = ATA_PROT_NODATA; | |
4410 | tf.nsect = sectors; | |
4411 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 4412 | |
2b789108 | 4413 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
18b2466c AC |
4414 | /* A clean abort indicates an original or just out of spec drive |
4415 | and we should continue as we issue the setup based on the | |
4416 | drive reported working geometry */ | |
4417 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
4418 | err_mask = 0; | |
8bf62ece | 4419 | |
6aff8f1f TH |
4420 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4421 | return err_mask; | |
8bf62ece AL |
4422 | } |
4423 | ||
1da177e4 | 4424 | /** |
0cba632b JG |
4425 | * ata_sg_clean - Unmap DMA memory associated with command |
4426 | * @qc: Command containing DMA memory to be released | |
4427 | * | |
4428 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
4429 | * |
4430 | * LOCKING: | |
cca3974e | 4431 | * spin_lock_irqsave(host lock) |
1da177e4 | 4432 | */ |
70e6ad0c | 4433 | void ata_sg_clean(struct ata_queued_cmd *qc) |
1da177e4 LT |
4434 | { |
4435 | struct ata_port *ap = qc->ap; | |
ff2aeb1e | 4436 | struct scatterlist *sg = qc->sg; |
1da177e4 LT |
4437 | int dir = qc->dma_dir; |
4438 | ||
a4631474 | 4439 | WARN_ON(sg == NULL); |
1da177e4 | 4440 | |
dde20207 | 4441 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 4442 | |
dde20207 JB |
4443 | if (qc->n_elem) |
4444 | dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); | |
1da177e4 LT |
4445 | |
4446 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
ff2aeb1e | 4447 | qc->sg = NULL; |
1da177e4 LT |
4448 | } |
4449 | ||
1da177e4 | 4450 | /** |
5895ef9a | 4451 | * atapi_check_dma - Check whether ATAPI DMA can be supported |
1da177e4 LT |
4452 | * @qc: Metadata associated with taskfile to check |
4453 | * | |
780a87f7 JG |
4454 | * Allow low-level driver to filter ATA PACKET commands, returning |
4455 | * a status indicating whether or not it is OK to use DMA for the | |
4456 | * supplied PACKET command. | |
4457 | * | |
1da177e4 | 4458 | * LOCKING: |
624d5c51 TH |
4459 | * spin_lock_irqsave(host lock) |
4460 | * | |
4461 | * RETURNS: 0 when ATAPI DMA can be used | |
4462 | * nonzero otherwise | |
4463 | */ | |
5895ef9a | 4464 | int atapi_check_dma(struct ata_queued_cmd *qc) |
624d5c51 TH |
4465 | { |
4466 | struct ata_port *ap = qc->ap; | |
71601958 | 4467 | |
624d5c51 TH |
4468 | /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a |
4469 | * few ATAPI devices choke on such DMA requests. | |
4470 | */ | |
6a87e42e TH |
4471 | if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) && |
4472 | unlikely(qc->nbytes & 15)) | |
624d5c51 | 4473 | return 1; |
e2cec771 | 4474 | |
624d5c51 TH |
4475 | if (ap->ops->check_atapi_dma) |
4476 | return ap->ops->check_atapi_dma(qc); | |
e2cec771 | 4477 | |
624d5c51 TH |
4478 | return 0; |
4479 | } | |
1da177e4 | 4480 | |
624d5c51 TH |
4481 | /** |
4482 | * ata_std_qc_defer - Check whether a qc needs to be deferred | |
4483 | * @qc: ATA command in question | |
4484 | * | |
4485 | * Non-NCQ commands cannot run with any other command, NCQ or | |
4486 | * not. As upper layer only knows the queue depth, we are | |
4487 | * responsible for maintaining exclusion. This function checks | |
4488 | * whether a new command @qc can be issued. | |
4489 | * | |
4490 | * LOCKING: | |
4491 | * spin_lock_irqsave(host lock) | |
4492 | * | |
4493 | * RETURNS: | |
4494 | * ATA_DEFER_* if deferring is needed, 0 otherwise. | |
4495 | */ | |
4496 | int ata_std_qc_defer(struct ata_queued_cmd *qc) | |
4497 | { | |
4498 | struct ata_link *link = qc->dev->link; | |
e2cec771 | 4499 | |
624d5c51 TH |
4500 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
4501 | if (!ata_tag_valid(link->active_tag)) | |
4502 | return 0; | |
4503 | } else { | |
4504 | if (!ata_tag_valid(link->active_tag) && !link->sactive) | |
4505 | return 0; | |
4506 | } | |
e2cec771 | 4507 | |
624d5c51 TH |
4508 | return ATA_DEFER_LINK; |
4509 | } | |
6912ccd5 | 4510 | |
624d5c51 | 4511 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
1da177e4 | 4512 | |
624d5c51 TH |
4513 | /** |
4514 | * ata_sg_init - Associate command with scatter-gather table. | |
4515 | * @qc: Command to be associated | |
4516 | * @sg: Scatter-gather table. | |
4517 | * @n_elem: Number of elements in s/g table. | |
4518 | * | |
4519 | * Initialize the data-related elements of queued_cmd @qc | |
4520 | * to point to a scatter-gather table @sg, containing @n_elem | |
4521 | * elements. | |
4522 | * | |
4523 | * LOCKING: | |
4524 | * spin_lock_irqsave(host lock) | |
4525 | */ | |
4526 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, | |
4527 | unsigned int n_elem) | |
4528 | { | |
4529 | qc->sg = sg; | |
4530 | qc->n_elem = n_elem; | |
4531 | qc->cursg = qc->sg; | |
4532 | } | |
bb5cb290 | 4533 | |
624d5c51 TH |
4534 | /** |
4535 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. | |
4536 | * @qc: Command with scatter-gather table to be mapped. | |
4537 | * | |
4538 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
4539 | * | |
4540 | * LOCKING: | |
4541 | * spin_lock_irqsave(host lock) | |
4542 | * | |
4543 | * RETURNS: | |
4544 | * Zero on success, negative on error. | |
4545 | * | |
4546 | */ | |
4547 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
4548 | { | |
4549 | struct ata_port *ap = qc->ap; | |
4550 | unsigned int n_elem; | |
1da177e4 | 4551 | |
624d5c51 | 4552 | VPRINTK("ENTER, ata%u\n", ap->print_id); |
e2cec771 | 4553 | |
624d5c51 TH |
4554 | n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); |
4555 | if (n_elem < 1) | |
4556 | return -1; | |
bb5cb290 | 4557 | |
624d5c51 | 4558 | DPRINTK("%d sg elements mapped\n", n_elem); |
bb5cb290 | 4559 | |
624d5c51 TH |
4560 | qc->n_elem = n_elem; |
4561 | qc->flags |= ATA_QCFLAG_DMAMAP; | |
1da177e4 | 4562 | |
624d5c51 | 4563 | return 0; |
1da177e4 LT |
4564 | } |
4565 | ||
624d5c51 TH |
4566 | /** |
4567 | * swap_buf_le16 - swap halves of 16-bit words in place | |
4568 | * @buf: Buffer to swap | |
4569 | * @buf_words: Number of 16-bit words in buffer. | |
4570 | * | |
4571 | * Swap halves of 16-bit words if needed to convert from | |
4572 | * little-endian byte order to native cpu byte order, or | |
4573 | * vice-versa. | |
4574 | * | |
4575 | * LOCKING: | |
4576 | * Inherited from caller. | |
4577 | */ | |
4578 | void swap_buf_le16(u16 *buf, unsigned int buf_words) | |
8061f5f0 | 4579 | { |
624d5c51 TH |
4580 | #ifdef __BIG_ENDIAN |
4581 | unsigned int i; | |
8061f5f0 | 4582 | |
624d5c51 TH |
4583 | for (i = 0; i < buf_words; i++) |
4584 | buf[i] = le16_to_cpu(buf[i]); | |
4585 | #endif /* __BIG_ENDIAN */ | |
8061f5f0 TH |
4586 | } |
4587 | ||
8a8bc223 TH |
4588 | /** |
4589 | * ata_qc_new - Request an available ATA command, for queueing | |
4590 | * @ap: Port associated with device @dev | |
4591 | * @dev: Device from whom we request an available command structure | |
4592 | * | |
4593 | * LOCKING: | |
4594 | * None. | |
4595 | */ | |
4596 | ||
4597 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
4598 | { | |
4599 | struct ata_queued_cmd *qc = NULL; | |
4600 | unsigned int i; | |
4601 | ||
4602 | /* no command while frozen */ | |
4603 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) | |
4604 | return NULL; | |
4605 | ||
4606 | /* the last tag is reserved for internal command. */ | |
4607 | for (i = 0; i < ATA_MAX_QUEUE - 1; i++) | |
4608 | if (!test_and_set_bit(i, &ap->qc_allocated)) { | |
4609 | qc = __ata_qc_from_tag(ap, i); | |
4610 | break; | |
4611 | } | |
4612 | ||
4613 | if (qc) | |
4614 | qc->tag = i; | |
4615 | ||
4616 | return qc; | |
4617 | } | |
4618 | ||
1da177e4 LT |
4619 | /** |
4620 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
1da177e4 | 4621 | * @dev: Device from whom we request an available command structure |
3cd8ddbd | 4622 | * @tag: command tag |
1da177e4 LT |
4623 | * |
4624 | * LOCKING: | |
0cba632b | 4625 | * None. |
1da177e4 LT |
4626 | */ |
4627 | ||
8a8bc223 | 4628 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) |
1da177e4 | 4629 | { |
9af5c9c9 | 4630 | struct ata_port *ap = dev->link->ap; |
1da177e4 LT |
4631 | struct ata_queued_cmd *qc; |
4632 | ||
8a8bc223 | 4633 | qc = ata_qc_new(ap); |
1da177e4 | 4634 | if (qc) { |
1da177e4 LT |
4635 | qc->scsicmd = NULL; |
4636 | qc->ap = ap; | |
4637 | qc->dev = dev; | |
1da177e4 | 4638 | |
2c13b7ce | 4639 | ata_qc_reinit(qc); |
1da177e4 LT |
4640 | } |
4641 | ||
4642 | return qc; | |
4643 | } | |
4644 | ||
8a8bc223 TH |
4645 | /** |
4646 | * ata_qc_free - free unused ata_queued_cmd | |
4647 | * @qc: Command to complete | |
4648 | * | |
4649 | * Designed to free unused ata_queued_cmd object | |
4650 | * in case something prevents using it. | |
4651 | * | |
4652 | * LOCKING: | |
4653 | * spin_lock_irqsave(host lock) | |
4654 | */ | |
4655 | void ata_qc_free(struct ata_queued_cmd *qc) | |
4656 | { | |
4657 | struct ata_port *ap = qc->ap; | |
4658 | unsigned int tag; | |
4659 | ||
4660 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ | |
4661 | ||
4662 | qc->flags = 0; | |
4663 | tag = qc->tag; | |
4664 | if (likely(ata_tag_valid(tag))) { | |
4665 | qc->tag = ATA_TAG_POISON; | |
4666 | clear_bit(tag, &ap->qc_allocated); | |
4667 | } | |
4668 | } | |
4669 | ||
76014427 | 4670 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 4671 | { |
dedaf2b0 | 4672 | struct ata_port *ap = qc->ap; |
9af5c9c9 | 4673 | struct ata_link *link = qc->dev->link; |
dedaf2b0 | 4674 | |
a4631474 TH |
4675 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
4676 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
1da177e4 LT |
4677 | |
4678 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4679 | ata_sg_clean(qc); | |
4680 | ||
7401abf2 | 4681 | /* command should be marked inactive atomically with qc completion */ |
da917d69 | 4682 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
9af5c9c9 | 4683 | link->sactive &= ~(1 << qc->tag); |
da917d69 TH |
4684 | if (!link->sactive) |
4685 | ap->nr_active_links--; | |
4686 | } else { | |
9af5c9c9 | 4687 | link->active_tag = ATA_TAG_POISON; |
da917d69 TH |
4688 | ap->nr_active_links--; |
4689 | } | |
4690 | ||
4691 | /* clear exclusive status */ | |
4692 | if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && | |
4693 | ap->excl_link == link)) | |
4694 | ap->excl_link = NULL; | |
7401abf2 | 4695 | |
3f3791d3 AL |
4696 | /* atapi: mark qc as inactive to prevent the interrupt handler |
4697 | * from completing the command twice later, before the error handler | |
4698 | * is called. (when rc != 0 and atapi request sense is needed) | |
4699 | */ | |
4700 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
dedaf2b0 | 4701 | ap->qc_active &= ~(1 << qc->tag); |
3f3791d3 | 4702 | |
1da177e4 | 4703 | /* call completion callback */ |
77853bf2 | 4704 | qc->complete_fn(qc); |
1da177e4 LT |
4705 | } |
4706 | ||
39599a53 TH |
4707 | static void fill_result_tf(struct ata_queued_cmd *qc) |
4708 | { | |
4709 | struct ata_port *ap = qc->ap; | |
4710 | ||
39599a53 | 4711 | qc->result_tf.flags = qc->tf.flags; |
22183bf5 | 4712 | ap->ops->qc_fill_rtf(qc); |
39599a53 TH |
4713 | } |
4714 | ||
00115e0f TH |
4715 | static void ata_verify_xfer(struct ata_queued_cmd *qc) |
4716 | { | |
4717 | struct ata_device *dev = qc->dev; | |
4718 | ||
4719 | if (ata_tag_internal(qc->tag)) | |
4720 | return; | |
4721 | ||
4722 | if (ata_is_nodata(qc->tf.protocol)) | |
4723 | return; | |
4724 | ||
4725 | if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) | |
4726 | return; | |
4727 | ||
4728 | dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; | |
4729 | } | |
4730 | ||
f686bcb8 TH |
4731 | /** |
4732 | * ata_qc_complete - Complete an active ATA command | |
4733 | * @qc: Command to complete | |
f686bcb8 TH |
4734 | * |
4735 | * Indicate to the mid and upper layers that an ATA | |
4736 | * command has completed, with either an ok or not-ok status. | |
4737 | * | |
4738 | * LOCKING: | |
cca3974e | 4739 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
4740 | */ |
4741 | void ata_qc_complete(struct ata_queued_cmd *qc) | |
4742 | { | |
4743 | struct ata_port *ap = qc->ap; | |
4744 | ||
4745 | /* XXX: New EH and old EH use different mechanisms to | |
4746 | * synchronize EH with regular execution path. | |
4747 | * | |
4748 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. | |
4749 | * Normal execution path is responsible for not accessing a | |
4750 | * failed qc. libata core enforces the rule by returning NULL | |
4751 | * from ata_qc_from_tag() for failed qcs. | |
4752 | * | |
4753 | * Old EH depends on ata_qc_complete() nullifying completion | |
4754 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does | |
4755 | * not synchronize with interrupt handler. Only PIO task is | |
4756 | * taken care of. | |
4757 | */ | |
4758 | if (ap->ops->error_handler) { | |
4dbfa39b TH |
4759 | struct ata_device *dev = qc->dev; |
4760 | struct ata_eh_info *ehi = &dev->link->eh_info; | |
4761 | ||
b51e9e5d | 4762 | WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); |
f686bcb8 TH |
4763 | |
4764 | if (unlikely(qc->err_mask)) | |
4765 | qc->flags |= ATA_QCFLAG_FAILED; | |
4766 | ||
4767 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { | |
4768 | if (!ata_tag_internal(qc->tag)) { | |
4769 | /* always fill result TF for failed qc */ | |
39599a53 | 4770 | fill_result_tf(qc); |
f686bcb8 TH |
4771 | ata_qc_schedule_eh(qc); |
4772 | return; | |
4773 | } | |
4774 | } | |
4775 | ||
4776 | /* read result TF if requested */ | |
4777 | if (qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 4778 | fill_result_tf(qc); |
f686bcb8 | 4779 | |
4dbfa39b TH |
4780 | /* Some commands need post-processing after successful |
4781 | * completion. | |
4782 | */ | |
4783 | switch (qc->tf.command) { | |
4784 | case ATA_CMD_SET_FEATURES: | |
4785 | if (qc->tf.feature != SETFEATURES_WC_ON && | |
4786 | qc->tf.feature != SETFEATURES_WC_OFF) | |
4787 | break; | |
4788 | /* fall through */ | |
4789 | case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ | |
4790 | case ATA_CMD_SET_MULTI: /* multi_count changed */ | |
4791 | /* revalidate device */ | |
4792 | ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; | |
4793 | ata_port_schedule_eh(ap); | |
4794 | break; | |
054a5fba TH |
4795 | |
4796 | case ATA_CMD_SLEEP: | |
4797 | dev->flags |= ATA_DFLAG_SLEEPING; | |
4798 | break; | |
4dbfa39b TH |
4799 | } |
4800 | ||
00115e0f TH |
4801 | if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) |
4802 | ata_verify_xfer(qc); | |
4803 | ||
f686bcb8 TH |
4804 | __ata_qc_complete(qc); |
4805 | } else { | |
4806 | if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) | |
4807 | return; | |
4808 | ||
4809 | /* read result TF if failed or requested */ | |
4810 | if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 4811 | fill_result_tf(qc); |
f686bcb8 TH |
4812 | |
4813 | __ata_qc_complete(qc); | |
4814 | } | |
4815 | } | |
4816 | ||
dedaf2b0 TH |
4817 | /** |
4818 | * ata_qc_complete_multiple - Complete multiple qcs successfully | |
4819 | * @ap: port in question | |
4820 | * @qc_active: new qc_active mask | |
dedaf2b0 TH |
4821 | * |
4822 | * Complete in-flight commands. This functions is meant to be | |
4823 | * called from low-level driver's interrupt routine to complete | |
4824 | * requests normally. ap->qc_active and @qc_active is compared | |
4825 | * and commands are completed accordingly. | |
4826 | * | |
4827 | * LOCKING: | |
cca3974e | 4828 | * spin_lock_irqsave(host lock) |
dedaf2b0 TH |
4829 | * |
4830 | * RETURNS: | |
4831 | * Number of completed commands on success, -errno otherwise. | |
4832 | */ | |
79f97dad | 4833 | int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active) |
dedaf2b0 TH |
4834 | { |
4835 | int nr_done = 0; | |
4836 | u32 done_mask; | |
4837 | int i; | |
4838 | ||
4839 | done_mask = ap->qc_active ^ qc_active; | |
4840 | ||
4841 | if (unlikely(done_mask & qc_active)) { | |
4842 | ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " | |
4843 | "(%08x->%08x)\n", ap->qc_active, qc_active); | |
4844 | return -EINVAL; | |
4845 | } | |
4846 | ||
4847 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
4848 | struct ata_queued_cmd *qc; | |
4849 | ||
4850 | if (!(done_mask & (1 << i))) | |
4851 | continue; | |
4852 | ||
4853 | if ((qc = ata_qc_from_tag(ap, i))) { | |
dedaf2b0 TH |
4854 | ata_qc_complete(qc); |
4855 | nr_done++; | |
4856 | } | |
4857 | } | |
4858 | ||
4859 | return nr_done; | |
4860 | } | |
4861 | ||
1da177e4 LT |
4862 | /** |
4863 | * ata_qc_issue - issue taskfile to device | |
4864 | * @qc: command to issue to device | |
4865 | * | |
4866 | * Prepare an ATA command to submission to device. | |
4867 | * This includes mapping the data into a DMA-able | |
4868 | * area, filling in the S/G table, and finally | |
4869 | * writing the taskfile to hardware, starting the command. | |
4870 | * | |
4871 | * LOCKING: | |
cca3974e | 4872 | * spin_lock_irqsave(host lock) |
1da177e4 | 4873 | */ |
8e0e694a | 4874 | void ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
4875 | { |
4876 | struct ata_port *ap = qc->ap; | |
9af5c9c9 | 4877 | struct ata_link *link = qc->dev->link; |
405e66b3 | 4878 | u8 prot = qc->tf.protocol; |
1da177e4 | 4879 | |
dedaf2b0 TH |
4880 | /* Make sure only one non-NCQ command is outstanding. The |
4881 | * check is skipped for old EH because it reuses active qc to | |
4882 | * request ATAPI sense. | |
4883 | */ | |
9af5c9c9 | 4884 | WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag)); |
dedaf2b0 | 4885 | |
1973a023 | 4886 | if (ata_is_ncq(prot)) { |
9af5c9c9 | 4887 | WARN_ON(link->sactive & (1 << qc->tag)); |
da917d69 TH |
4888 | |
4889 | if (!link->sactive) | |
4890 | ap->nr_active_links++; | |
9af5c9c9 | 4891 | link->sactive |= 1 << qc->tag; |
dedaf2b0 | 4892 | } else { |
9af5c9c9 | 4893 | WARN_ON(link->sactive); |
da917d69 TH |
4894 | |
4895 | ap->nr_active_links++; | |
9af5c9c9 | 4896 | link->active_tag = qc->tag; |
dedaf2b0 TH |
4897 | } |
4898 | ||
e4a70e76 | 4899 | qc->flags |= ATA_QCFLAG_ACTIVE; |
dedaf2b0 | 4900 | ap->qc_active |= 1 << qc->tag; |
e4a70e76 | 4901 | |
f92a2636 TH |
4902 | /* We guarantee to LLDs that they will have at least one |
4903 | * non-zero sg if the command is a data command. | |
4904 | */ | |
ff2aeb1e | 4905 | BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes)); |
f92a2636 | 4906 | |
405e66b3 | 4907 | if (ata_is_dma(prot) || (ata_is_pio(prot) && |
f92a2636 | 4908 | (ap->flags & ATA_FLAG_PIO_DMA))) |
001102d7 TH |
4909 | if (ata_sg_setup(qc)) |
4910 | goto sg_err; | |
1da177e4 | 4911 | |
cf480626 | 4912 | /* if device is sleeping, schedule reset and abort the link */ |
054a5fba | 4913 | if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { |
cf480626 | 4914 | link->eh_info.action |= ATA_EH_RESET; |
054a5fba TH |
4915 | ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); |
4916 | ata_link_abort(link); | |
4917 | return; | |
4918 | } | |
4919 | ||
1da177e4 LT |
4920 | ap->ops->qc_prep(qc); |
4921 | ||
8e0e694a TH |
4922 | qc->err_mask |= ap->ops->qc_issue(qc); |
4923 | if (unlikely(qc->err_mask)) | |
4924 | goto err; | |
4925 | return; | |
1da177e4 | 4926 | |
8e436af9 | 4927 | sg_err: |
8e0e694a TH |
4928 | qc->err_mask |= AC_ERR_SYSTEM; |
4929 | err: | |
4930 | ata_qc_complete(qc); | |
1da177e4 LT |
4931 | } |
4932 | ||
34bf2170 TH |
4933 | /** |
4934 | * sata_scr_valid - test whether SCRs are accessible | |
936fd732 | 4935 | * @link: ATA link to test SCR accessibility for |
34bf2170 | 4936 | * |
936fd732 | 4937 | * Test whether SCRs are accessible for @link. |
34bf2170 TH |
4938 | * |
4939 | * LOCKING: | |
4940 | * None. | |
4941 | * | |
4942 | * RETURNS: | |
4943 | * 1 if SCRs are accessible, 0 otherwise. | |
4944 | */ | |
936fd732 | 4945 | int sata_scr_valid(struct ata_link *link) |
34bf2170 | 4946 | { |
936fd732 TH |
4947 | struct ata_port *ap = link->ap; |
4948 | ||
a16abc0b | 4949 | return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; |
34bf2170 TH |
4950 | } |
4951 | ||
4952 | /** | |
4953 | * sata_scr_read - read SCR register of the specified port | |
936fd732 | 4954 | * @link: ATA link to read SCR for |
34bf2170 TH |
4955 | * @reg: SCR to read |
4956 | * @val: Place to store read value | |
4957 | * | |
936fd732 | 4958 | * Read SCR register @reg of @link into *@val. This function is |
633273a3 TH |
4959 | * guaranteed to succeed if @link is ap->link, the cable type of |
4960 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
4961 | * |
4962 | * LOCKING: | |
633273a3 | 4963 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
4964 | * |
4965 | * RETURNS: | |
4966 | * 0 on success, negative errno on failure. | |
4967 | */ | |
936fd732 | 4968 | int sata_scr_read(struct ata_link *link, int reg, u32 *val) |
34bf2170 | 4969 | { |
633273a3 | 4970 | if (ata_is_host_link(link)) { |
633273a3 | 4971 | if (sata_scr_valid(link)) |
82ef04fb | 4972 | return link->ap->ops->scr_read(link, reg, val); |
633273a3 TH |
4973 | return -EOPNOTSUPP; |
4974 | } | |
4975 | ||
4976 | return sata_pmp_scr_read(link, reg, val); | |
34bf2170 TH |
4977 | } |
4978 | ||
4979 | /** | |
4980 | * sata_scr_write - write SCR register of the specified port | |
936fd732 | 4981 | * @link: ATA link to write SCR for |
34bf2170 TH |
4982 | * @reg: SCR to write |
4983 | * @val: value to write | |
4984 | * | |
936fd732 | 4985 | * Write @val to SCR register @reg of @link. This function is |
633273a3 TH |
4986 | * guaranteed to succeed if @link is ap->link, the cable type of |
4987 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
4988 | * |
4989 | * LOCKING: | |
633273a3 | 4990 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
4991 | * |
4992 | * RETURNS: | |
4993 | * 0 on success, negative errno on failure. | |
4994 | */ | |
936fd732 | 4995 | int sata_scr_write(struct ata_link *link, int reg, u32 val) |
34bf2170 | 4996 | { |
633273a3 | 4997 | if (ata_is_host_link(link)) { |
633273a3 | 4998 | if (sata_scr_valid(link)) |
82ef04fb | 4999 | return link->ap->ops->scr_write(link, reg, val); |
633273a3 TH |
5000 | return -EOPNOTSUPP; |
5001 | } | |
936fd732 | 5002 | |
633273a3 | 5003 | return sata_pmp_scr_write(link, reg, val); |
34bf2170 TH |
5004 | } |
5005 | ||
5006 | /** | |
5007 | * sata_scr_write_flush - write SCR register of the specified port and flush | |
936fd732 | 5008 | * @link: ATA link to write SCR for |
34bf2170 TH |
5009 | * @reg: SCR to write |
5010 | * @val: value to write | |
5011 | * | |
5012 | * This function is identical to sata_scr_write() except that this | |
5013 | * function performs flush after writing to the register. | |
5014 | * | |
5015 | * LOCKING: | |
633273a3 | 5016 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
5017 | * |
5018 | * RETURNS: | |
5019 | * 0 on success, negative errno on failure. | |
5020 | */ | |
936fd732 | 5021 | int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) |
34bf2170 | 5022 | { |
633273a3 | 5023 | if (ata_is_host_link(link)) { |
633273a3 | 5024 | int rc; |
da3dbb17 | 5025 | |
633273a3 | 5026 | if (sata_scr_valid(link)) { |
82ef04fb | 5027 | rc = link->ap->ops->scr_write(link, reg, val); |
633273a3 | 5028 | if (rc == 0) |
82ef04fb | 5029 | rc = link->ap->ops->scr_read(link, reg, &val); |
633273a3 TH |
5030 | return rc; |
5031 | } | |
5032 | return -EOPNOTSUPP; | |
34bf2170 | 5033 | } |
633273a3 TH |
5034 | |
5035 | return sata_pmp_scr_write(link, reg, val); | |
34bf2170 TH |
5036 | } |
5037 | ||
5038 | /** | |
b1c72916 | 5039 | * ata_phys_link_online - test whether the given link is online |
936fd732 | 5040 | * @link: ATA link to test |
34bf2170 | 5041 | * |
936fd732 TH |
5042 | * Test whether @link is online. Note that this function returns |
5043 | * 0 if online status of @link cannot be obtained, so | |
5044 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
5045 | * |
5046 | * LOCKING: | |
5047 | * None. | |
5048 | * | |
5049 | * RETURNS: | |
b5b3fa38 | 5050 | * True if the port online status is available and online. |
34bf2170 | 5051 | */ |
b1c72916 | 5052 | bool ata_phys_link_online(struct ata_link *link) |
34bf2170 TH |
5053 | { |
5054 | u32 sstatus; | |
5055 | ||
936fd732 TH |
5056 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
5057 | (sstatus & 0xf) == 0x3) | |
b5b3fa38 TH |
5058 | return true; |
5059 | return false; | |
34bf2170 TH |
5060 | } |
5061 | ||
5062 | /** | |
b1c72916 | 5063 | * ata_phys_link_offline - test whether the given link is offline |
936fd732 | 5064 | * @link: ATA link to test |
34bf2170 | 5065 | * |
936fd732 TH |
5066 | * Test whether @link is offline. Note that this function |
5067 | * returns 0 if offline status of @link cannot be obtained, so | |
5068 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
5069 | * |
5070 | * LOCKING: | |
5071 | * None. | |
5072 | * | |
5073 | * RETURNS: | |
b5b3fa38 | 5074 | * True if the port offline status is available and offline. |
34bf2170 | 5075 | */ |
b1c72916 | 5076 | bool ata_phys_link_offline(struct ata_link *link) |
34bf2170 TH |
5077 | { |
5078 | u32 sstatus; | |
5079 | ||
936fd732 TH |
5080 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
5081 | (sstatus & 0xf) != 0x3) | |
b5b3fa38 TH |
5082 | return true; |
5083 | return false; | |
34bf2170 | 5084 | } |
0baab86b | 5085 | |
b1c72916 TH |
5086 | /** |
5087 | * ata_link_online - test whether the given link is online | |
5088 | * @link: ATA link to test | |
5089 | * | |
5090 | * Test whether @link is online. This is identical to | |
5091 | * ata_phys_link_online() when there's no slave link. When | |
5092 | * there's a slave link, this function should only be called on | |
5093 | * the master link and will return true if any of M/S links is | |
5094 | * online. | |
5095 | * | |
5096 | * LOCKING: | |
5097 | * None. | |
5098 | * | |
5099 | * RETURNS: | |
5100 | * True if the port online status is available and online. | |
5101 | */ | |
5102 | bool ata_link_online(struct ata_link *link) | |
5103 | { | |
5104 | struct ata_link *slave = link->ap->slave_link; | |
5105 | ||
5106 | WARN_ON(link == slave); /* shouldn't be called on slave link */ | |
5107 | ||
5108 | return ata_phys_link_online(link) || | |
5109 | (slave && ata_phys_link_online(slave)); | |
5110 | } | |
5111 | ||
5112 | /** | |
5113 | * ata_link_offline - test whether the given link is offline | |
5114 | * @link: ATA link to test | |
5115 | * | |
5116 | * Test whether @link is offline. This is identical to | |
5117 | * ata_phys_link_offline() when there's no slave link. When | |
5118 | * there's a slave link, this function should only be called on | |
5119 | * the master link and will return true if both M/S links are | |
5120 | * offline. | |
5121 | * | |
5122 | * LOCKING: | |
5123 | * None. | |
5124 | * | |
5125 | * RETURNS: | |
5126 | * True if the port offline status is available and offline. | |
5127 | */ | |
5128 | bool ata_link_offline(struct ata_link *link) | |
5129 | { | |
5130 | struct ata_link *slave = link->ap->slave_link; | |
5131 | ||
5132 | WARN_ON(link == slave); /* shouldn't be called on slave link */ | |
5133 | ||
5134 | return ata_phys_link_offline(link) && | |
5135 | (!slave || ata_phys_link_offline(slave)); | |
5136 | } | |
5137 | ||
6ffa01d8 | 5138 | #ifdef CONFIG_PM |
cca3974e JG |
5139 | static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, |
5140 | unsigned int action, unsigned int ehi_flags, | |
5141 | int wait) | |
500530f6 TH |
5142 | { |
5143 | unsigned long flags; | |
5144 | int i, rc; | |
5145 | ||
cca3974e JG |
5146 | for (i = 0; i < host->n_ports; i++) { |
5147 | struct ata_port *ap = host->ports[i]; | |
e3667ebf | 5148 | struct ata_link *link; |
500530f6 TH |
5149 | |
5150 | /* Previous resume operation might still be in | |
5151 | * progress. Wait for PM_PENDING to clear. | |
5152 | */ | |
5153 | if (ap->pflags & ATA_PFLAG_PM_PENDING) { | |
5154 | ata_port_wait_eh(ap); | |
5155 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
5156 | } | |
5157 | ||
5158 | /* request PM ops to EH */ | |
5159 | spin_lock_irqsave(ap->lock, flags); | |
5160 | ||
5161 | ap->pm_mesg = mesg; | |
5162 | if (wait) { | |
5163 | rc = 0; | |
5164 | ap->pm_result = &rc; | |
5165 | } | |
5166 | ||
5167 | ap->pflags |= ATA_PFLAG_PM_PENDING; | |
e3667ebf TH |
5168 | __ata_port_for_each_link(link, ap) { |
5169 | link->eh_info.action |= action; | |
5170 | link->eh_info.flags |= ehi_flags; | |
5171 | } | |
500530f6 TH |
5172 | |
5173 | ata_port_schedule_eh(ap); | |
5174 | ||
5175 | spin_unlock_irqrestore(ap->lock, flags); | |
5176 | ||
5177 | /* wait and check result */ | |
5178 | if (wait) { | |
5179 | ata_port_wait_eh(ap); | |
5180 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
5181 | if (rc) | |
5182 | return rc; | |
5183 | } | |
5184 | } | |
5185 | ||
5186 | return 0; | |
5187 | } | |
5188 | ||
5189 | /** | |
cca3974e JG |
5190 | * ata_host_suspend - suspend host |
5191 | * @host: host to suspend | |
500530f6 TH |
5192 | * @mesg: PM message |
5193 | * | |
cca3974e | 5194 | * Suspend @host. Actual operation is performed by EH. This |
500530f6 TH |
5195 | * function requests EH to perform PM operations and waits for EH |
5196 | * to finish. | |
5197 | * | |
5198 | * LOCKING: | |
5199 | * Kernel thread context (may sleep). | |
5200 | * | |
5201 | * RETURNS: | |
5202 | * 0 on success, -errno on failure. | |
5203 | */ | |
cca3974e | 5204 | int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
500530f6 | 5205 | { |
9666f400 | 5206 | int rc; |
500530f6 | 5207 | |
ca77329f KCA |
5208 | /* |
5209 | * disable link pm on all ports before requesting | |
5210 | * any pm activity | |
5211 | */ | |
5212 | ata_lpm_enable(host); | |
5213 | ||
cca3974e | 5214 | rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); |
72ad6ec4 JG |
5215 | if (rc == 0) |
5216 | host->dev->power.power_state = mesg; | |
500530f6 TH |
5217 | return rc; |
5218 | } | |
5219 | ||
5220 | /** | |
cca3974e JG |
5221 | * ata_host_resume - resume host |
5222 | * @host: host to resume | |
500530f6 | 5223 | * |
cca3974e | 5224 | * Resume @host. Actual operation is performed by EH. This |
500530f6 TH |
5225 | * function requests EH to perform PM operations and returns. |
5226 | * Note that all resume operations are performed parallely. | |
5227 | * | |
5228 | * LOCKING: | |
5229 | * Kernel thread context (may sleep). | |
5230 | */ | |
cca3974e | 5231 | void ata_host_resume(struct ata_host *host) |
500530f6 | 5232 | { |
cf480626 | 5233 | ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET, |
cca3974e | 5234 | ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); |
72ad6ec4 | 5235 | host->dev->power.power_state = PMSG_ON; |
ca77329f KCA |
5236 | |
5237 | /* reenable link pm */ | |
5238 | ata_lpm_disable(host); | |
500530f6 | 5239 | } |
6ffa01d8 | 5240 | #endif |
500530f6 | 5241 | |
c893a3ae RD |
5242 | /** |
5243 | * ata_port_start - Set port up for dma. | |
5244 | * @ap: Port to initialize | |
5245 | * | |
5246 | * Called just after data structures for each port are | |
5247 | * initialized. Allocates space for PRD table. | |
5248 | * | |
5249 | * May be used as the port_start() entry in ata_port_operations. | |
5250 | * | |
5251 | * LOCKING: | |
5252 | * Inherited from caller. | |
5253 | */ | |
f0d36efd | 5254 | int ata_port_start(struct ata_port *ap) |
1da177e4 | 5255 | { |
2f1f610b | 5256 | struct device *dev = ap->dev; |
1da177e4 | 5257 | |
f0d36efd TH |
5258 | ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, |
5259 | GFP_KERNEL); | |
1da177e4 LT |
5260 | if (!ap->prd) |
5261 | return -ENOMEM; | |
5262 | ||
1da177e4 LT |
5263 | return 0; |
5264 | } | |
5265 | ||
3ef3b43d TH |
5266 | /** |
5267 | * ata_dev_init - Initialize an ata_device structure | |
5268 | * @dev: Device structure to initialize | |
5269 | * | |
5270 | * Initialize @dev in preparation for probing. | |
5271 | * | |
5272 | * LOCKING: | |
5273 | * Inherited from caller. | |
5274 | */ | |
5275 | void ata_dev_init(struct ata_device *dev) | |
5276 | { | |
b1c72916 | 5277 | struct ata_link *link = ata_dev_phys_link(dev); |
9af5c9c9 | 5278 | struct ata_port *ap = link->ap; |
72fa4b74 TH |
5279 | unsigned long flags; |
5280 | ||
b1c72916 | 5281 | /* SATA spd limit is bound to the attached device, reset together */ |
9af5c9c9 TH |
5282 | link->sata_spd_limit = link->hw_sata_spd_limit; |
5283 | link->sata_spd = 0; | |
5a04bf4b | 5284 | |
72fa4b74 TH |
5285 | /* High bits of dev->flags are used to record warm plug |
5286 | * requests which occur asynchronously. Synchronize using | |
cca3974e | 5287 | * host lock. |
72fa4b74 | 5288 | */ |
ba6a1308 | 5289 | spin_lock_irqsave(ap->lock, flags); |
72fa4b74 | 5290 | dev->flags &= ~ATA_DFLAG_INIT_MASK; |
3dcc323f | 5291 | dev->horkage = 0; |
ba6a1308 | 5292 | spin_unlock_irqrestore(ap->lock, flags); |
3ef3b43d | 5293 | |
72fa4b74 TH |
5294 | memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, |
5295 | sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); | |
3ef3b43d TH |
5296 | dev->pio_mask = UINT_MAX; |
5297 | dev->mwdma_mask = UINT_MAX; | |
5298 | dev->udma_mask = UINT_MAX; | |
5299 | } | |
5300 | ||
4fb37a25 TH |
5301 | /** |
5302 | * ata_link_init - Initialize an ata_link structure | |
5303 | * @ap: ATA port link is attached to | |
5304 | * @link: Link structure to initialize | |
8989805d | 5305 | * @pmp: Port multiplier port number |
4fb37a25 TH |
5306 | * |
5307 | * Initialize @link. | |
5308 | * | |
5309 | * LOCKING: | |
5310 | * Kernel thread context (may sleep) | |
5311 | */ | |
fb7fd614 | 5312 | void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) |
4fb37a25 TH |
5313 | { |
5314 | int i; | |
5315 | ||
5316 | /* clear everything except for devices */ | |
5317 | memset(link, 0, offsetof(struct ata_link, device[0])); | |
5318 | ||
5319 | link->ap = ap; | |
8989805d | 5320 | link->pmp = pmp; |
4fb37a25 TH |
5321 | link->active_tag = ATA_TAG_POISON; |
5322 | link->hw_sata_spd_limit = UINT_MAX; | |
5323 | ||
5324 | /* can't use iterator, ap isn't initialized yet */ | |
5325 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
5326 | struct ata_device *dev = &link->device[i]; | |
5327 | ||
5328 | dev->link = link; | |
5329 | dev->devno = dev - link->device; | |
5330 | ata_dev_init(dev); | |
5331 | } | |
5332 | } | |
5333 | ||
5334 | /** | |
5335 | * sata_link_init_spd - Initialize link->sata_spd_limit | |
5336 | * @link: Link to configure sata_spd_limit for | |
5337 | * | |
5338 | * Initialize @link->[hw_]sata_spd_limit to the currently | |
5339 | * configured value. | |
5340 | * | |
5341 | * LOCKING: | |
5342 | * Kernel thread context (may sleep). | |
5343 | * | |
5344 | * RETURNS: | |
5345 | * 0 on success, -errno on failure. | |
5346 | */ | |
fb7fd614 | 5347 | int sata_link_init_spd(struct ata_link *link) |
4fb37a25 | 5348 | { |
33267325 | 5349 | u8 spd; |
4fb37a25 TH |
5350 | int rc; |
5351 | ||
d127ea7b | 5352 | rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol); |
4fb37a25 TH |
5353 | if (rc) |
5354 | return rc; | |
5355 | ||
d127ea7b | 5356 | spd = (link->saved_scontrol >> 4) & 0xf; |
4fb37a25 TH |
5357 | if (spd) |
5358 | link->hw_sata_spd_limit &= (1 << spd) - 1; | |
5359 | ||
05944bdf | 5360 | ata_force_link_limits(link); |
33267325 | 5361 | |
4fb37a25 TH |
5362 | link->sata_spd_limit = link->hw_sata_spd_limit; |
5363 | ||
5364 | return 0; | |
5365 | } | |
5366 | ||
1da177e4 | 5367 | /** |
f3187195 TH |
5368 | * ata_port_alloc - allocate and initialize basic ATA port resources |
5369 | * @host: ATA host this allocated port belongs to | |
1da177e4 | 5370 | * |
f3187195 TH |
5371 | * Allocate and initialize basic ATA port resources. |
5372 | * | |
5373 | * RETURNS: | |
5374 | * Allocate ATA port on success, NULL on failure. | |
0cba632b | 5375 | * |
1da177e4 | 5376 | * LOCKING: |
f3187195 | 5377 | * Inherited from calling layer (may sleep). |
1da177e4 | 5378 | */ |
f3187195 | 5379 | struct ata_port *ata_port_alloc(struct ata_host *host) |
1da177e4 | 5380 | { |
f3187195 | 5381 | struct ata_port *ap; |
1da177e4 | 5382 | |
f3187195 TH |
5383 | DPRINTK("ENTER\n"); |
5384 | ||
5385 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); | |
5386 | if (!ap) | |
5387 | return NULL; | |
5388 | ||
f4d6d004 | 5389 | ap->pflags |= ATA_PFLAG_INITIALIZING; |
cca3974e | 5390 | ap->lock = &host->lock; |
198e0fed | 5391 | ap->flags = ATA_FLAG_DISABLED; |
f3187195 | 5392 | ap->print_id = -1; |
1da177e4 | 5393 | ap->ctl = ATA_DEVCTL_OBS; |
cca3974e | 5394 | ap->host = host; |
f3187195 | 5395 | ap->dev = host->dev; |
1da177e4 | 5396 | ap->last_ctl = 0xFF; |
bd5d825c BP |
5397 | |
5398 | #if defined(ATA_VERBOSE_DEBUG) | |
5399 | /* turn on all debugging levels */ | |
5400 | ap->msg_enable = 0x00FF; | |
5401 | #elif defined(ATA_DEBUG) | |
5402 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; | |
88574551 | 5403 | #else |
0dd4b21f | 5404 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
bd5d825c | 5405 | #endif |
1da177e4 | 5406 | |
127102ae | 5407 | #ifdef CONFIG_ATA_SFF |
442eacc3 | 5408 | INIT_DELAYED_WORK(&ap->port_task, ata_pio_task); |
f667fdbb TH |
5409 | #else |
5410 | INIT_DELAYED_WORK(&ap->port_task, NULL); | |
127102ae | 5411 | #endif |
65f27f38 DH |
5412 | INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); |
5413 | INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); | |
a72ec4ce | 5414 | INIT_LIST_HEAD(&ap->eh_done_q); |
c6cf9e99 | 5415 | init_waitqueue_head(&ap->eh_wait_q); |
45fabbb7 | 5416 | init_completion(&ap->park_req_pending); |
5ddf24c5 TH |
5417 | init_timer_deferrable(&ap->fastdrain_timer); |
5418 | ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; | |
5419 | ap->fastdrain_timer.data = (unsigned long)ap; | |
1da177e4 | 5420 | |
838df628 | 5421 | ap->cbl = ATA_CBL_NONE; |
838df628 | 5422 | |
8989805d | 5423 | ata_link_init(ap, &ap->link, 0); |
1da177e4 LT |
5424 | |
5425 | #ifdef ATA_IRQ_TRAP | |
5426 | ap->stats.unhandled_irq = 1; | |
5427 | ap->stats.idle_irq = 1; | |
5428 | #endif | |
1da177e4 | 5429 | return ap; |
1da177e4 LT |
5430 | } |
5431 | ||
f0d36efd TH |
5432 | static void ata_host_release(struct device *gendev, void *res) |
5433 | { | |
5434 | struct ata_host *host = dev_get_drvdata(gendev); | |
5435 | int i; | |
5436 | ||
1aa506e4 TH |
5437 | for (i = 0; i < host->n_ports; i++) { |
5438 | struct ata_port *ap = host->ports[i]; | |
5439 | ||
4911487a TH |
5440 | if (!ap) |
5441 | continue; | |
5442 | ||
5443 | if (ap->scsi_host) | |
1aa506e4 TH |
5444 | scsi_host_put(ap->scsi_host); |
5445 | ||
633273a3 | 5446 | kfree(ap->pmp_link); |
b1c72916 | 5447 | kfree(ap->slave_link); |
4911487a | 5448 | kfree(ap); |
1aa506e4 TH |
5449 | host->ports[i] = NULL; |
5450 | } | |
5451 | ||
1aa56cca | 5452 | dev_set_drvdata(gendev, NULL); |
f0d36efd TH |
5453 | } |
5454 | ||
f3187195 TH |
5455 | /** |
5456 | * ata_host_alloc - allocate and init basic ATA host resources | |
5457 | * @dev: generic device this host is associated with | |
5458 | * @max_ports: maximum number of ATA ports associated with this host | |
5459 | * | |
5460 | * Allocate and initialize basic ATA host resources. LLD calls | |
5461 | * this function to allocate a host, initializes it fully and | |
5462 | * attaches it using ata_host_register(). | |
5463 | * | |
5464 | * @max_ports ports are allocated and host->n_ports is | |
5465 | * initialized to @max_ports. The caller is allowed to decrease | |
5466 | * host->n_ports before calling ata_host_register(). The unused | |
5467 | * ports will be automatically freed on registration. | |
5468 | * | |
5469 | * RETURNS: | |
5470 | * Allocate ATA host on success, NULL on failure. | |
5471 | * | |
5472 | * LOCKING: | |
5473 | * Inherited from calling layer (may sleep). | |
5474 | */ | |
5475 | struct ata_host *ata_host_alloc(struct device *dev, int max_ports) | |
5476 | { | |
5477 | struct ata_host *host; | |
5478 | size_t sz; | |
5479 | int i; | |
5480 | ||
5481 | DPRINTK("ENTER\n"); | |
5482 | ||
5483 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) | |
5484 | return NULL; | |
5485 | ||
5486 | /* alloc a container for our list of ATA ports (buses) */ | |
5487 | sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); | |
5488 | /* alloc a container for our list of ATA ports (buses) */ | |
5489 | host = devres_alloc(ata_host_release, sz, GFP_KERNEL); | |
5490 | if (!host) | |
5491 | goto err_out; | |
5492 | ||
5493 | devres_add(dev, host); | |
5494 | dev_set_drvdata(dev, host); | |
5495 | ||
5496 | spin_lock_init(&host->lock); | |
5497 | host->dev = dev; | |
5498 | host->n_ports = max_ports; | |
5499 | ||
5500 | /* allocate ports bound to this host */ | |
5501 | for (i = 0; i < max_ports; i++) { | |
5502 | struct ata_port *ap; | |
5503 | ||
5504 | ap = ata_port_alloc(host); | |
5505 | if (!ap) | |
5506 | goto err_out; | |
5507 | ||
5508 | ap->port_no = i; | |
5509 | host->ports[i] = ap; | |
5510 | } | |
5511 | ||
5512 | devres_remove_group(dev, NULL); | |
5513 | return host; | |
5514 | ||
5515 | err_out: | |
5516 | devres_release_group(dev, NULL); | |
5517 | return NULL; | |
5518 | } | |
5519 | ||
f5cda257 TH |
5520 | /** |
5521 | * ata_host_alloc_pinfo - alloc host and init with port_info array | |
5522 | * @dev: generic device this host is associated with | |
5523 | * @ppi: array of ATA port_info to initialize host with | |
5524 | * @n_ports: number of ATA ports attached to this host | |
5525 | * | |
5526 | * Allocate ATA host and initialize with info from @ppi. If NULL | |
5527 | * terminated, @ppi may contain fewer entries than @n_ports. The | |
5528 | * last entry will be used for the remaining ports. | |
5529 | * | |
5530 | * RETURNS: | |
5531 | * Allocate ATA host on success, NULL on failure. | |
5532 | * | |
5533 | * LOCKING: | |
5534 | * Inherited from calling layer (may sleep). | |
5535 | */ | |
5536 | struct ata_host *ata_host_alloc_pinfo(struct device *dev, | |
5537 | const struct ata_port_info * const * ppi, | |
5538 | int n_ports) | |
5539 | { | |
5540 | const struct ata_port_info *pi; | |
5541 | struct ata_host *host; | |
5542 | int i, j; | |
5543 | ||
5544 | host = ata_host_alloc(dev, n_ports); | |
5545 | if (!host) | |
5546 | return NULL; | |
5547 | ||
5548 | for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { | |
5549 | struct ata_port *ap = host->ports[i]; | |
5550 | ||
5551 | if (ppi[j]) | |
5552 | pi = ppi[j++]; | |
5553 | ||
5554 | ap->pio_mask = pi->pio_mask; | |
5555 | ap->mwdma_mask = pi->mwdma_mask; | |
5556 | ap->udma_mask = pi->udma_mask; | |
5557 | ap->flags |= pi->flags; | |
0c88758b | 5558 | ap->link.flags |= pi->link_flags; |
f5cda257 TH |
5559 | ap->ops = pi->port_ops; |
5560 | ||
5561 | if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) | |
5562 | host->ops = pi->port_ops; | |
f5cda257 TH |
5563 | } |
5564 | ||
5565 | return host; | |
5566 | } | |
5567 | ||
b1c72916 TH |
5568 | /** |
5569 | * ata_slave_link_init - initialize slave link | |
5570 | * @ap: port to initialize slave link for | |
5571 | * | |
5572 | * Create and initialize slave link for @ap. This enables slave | |
5573 | * link handling on the port. | |
5574 | * | |
5575 | * In libata, a port contains links and a link contains devices. | |
5576 | * There is single host link but if a PMP is attached to it, | |
5577 | * there can be multiple fan-out links. On SATA, there's usually | |
5578 | * a single device connected to a link but PATA and SATA | |
5579 | * controllers emulating TF based interface can have two - master | |
5580 | * and slave. | |
5581 | * | |
5582 | * However, there are a few controllers which don't fit into this | |
5583 | * abstraction too well - SATA controllers which emulate TF | |
5584 | * interface with both master and slave devices but also have | |
5585 | * separate SCR register sets for each device. These controllers | |
5586 | * need separate links for physical link handling | |
5587 | * (e.g. onlineness, link speed) but should be treated like a | |
5588 | * traditional M/S controller for everything else (e.g. command | |
5589 | * issue, softreset). | |
5590 | * | |
5591 | * slave_link is libata's way of handling this class of | |
5592 | * controllers without impacting core layer too much. For | |
5593 | * anything other than physical link handling, the default host | |
5594 | * link is used for both master and slave. For physical link | |
5595 | * handling, separate @ap->slave_link is used. All dirty details | |
5596 | * are implemented inside libata core layer. From LLD's POV, the | |
5597 | * only difference is that prereset, hardreset and postreset are | |
5598 | * called once more for the slave link, so the reset sequence | |
5599 | * looks like the following. | |
5600 | * | |
5601 | * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) -> | |
5602 | * softreset(M) -> postreset(M) -> postreset(S) | |
5603 | * | |
5604 | * Note that softreset is called only for the master. Softreset | |
5605 | * resets both M/S by definition, so SRST on master should handle | |
5606 | * both (the standard method will work just fine). | |
5607 | * | |
5608 | * LOCKING: | |
5609 | * Should be called before host is registered. | |
5610 | * | |
5611 | * RETURNS: | |
5612 | * 0 on success, -errno on failure. | |
5613 | */ | |
5614 | int ata_slave_link_init(struct ata_port *ap) | |
5615 | { | |
5616 | struct ata_link *link; | |
5617 | ||
5618 | WARN_ON(ap->slave_link); | |
5619 | WARN_ON(ap->flags & ATA_FLAG_PMP); | |
5620 | ||
5621 | link = kzalloc(sizeof(*link), GFP_KERNEL); | |
5622 | if (!link) | |
5623 | return -ENOMEM; | |
5624 | ||
5625 | ata_link_init(ap, link, 1); | |
5626 | ap->slave_link = link; | |
5627 | return 0; | |
5628 | } | |
5629 | ||
32ebbc0c TH |
5630 | static void ata_host_stop(struct device *gendev, void *res) |
5631 | { | |
5632 | struct ata_host *host = dev_get_drvdata(gendev); | |
5633 | int i; | |
5634 | ||
5635 | WARN_ON(!(host->flags & ATA_HOST_STARTED)); | |
5636 | ||
5637 | for (i = 0; i < host->n_ports; i++) { | |
5638 | struct ata_port *ap = host->ports[i]; | |
5639 | ||
5640 | if (ap->ops->port_stop) | |
5641 | ap->ops->port_stop(ap); | |
5642 | } | |
5643 | ||
5644 | if (host->ops->host_stop) | |
5645 | host->ops->host_stop(host); | |
5646 | } | |
5647 | ||
029cfd6b TH |
5648 | /** |
5649 | * ata_finalize_port_ops - finalize ata_port_operations | |
5650 | * @ops: ata_port_operations to finalize | |
5651 | * | |
5652 | * An ata_port_operations can inherit from another ops and that | |
5653 | * ops can again inherit from another. This can go on as many | |
5654 | * times as necessary as long as there is no loop in the | |
5655 | * inheritance chain. | |
5656 | * | |
5657 | * Ops tables are finalized when the host is started. NULL or | |
5658 | * unspecified entries are inherited from the closet ancestor | |
5659 | * which has the method and the entry is populated with it. | |
5660 | * After finalization, the ops table directly points to all the | |
5661 | * methods and ->inherits is no longer necessary and cleared. | |
5662 | * | |
5663 | * Using ATA_OP_NULL, inheriting ops can force a method to NULL. | |
5664 | * | |
5665 | * LOCKING: | |
5666 | * None. | |
5667 | */ | |
5668 | static void ata_finalize_port_ops(struct ata_port_operations *ops) | |
5669 | { | |
2da67659 | 5670 | static DEFINE_SPINLOCK(lock); |
029cfd6b TH |
5671 | const struct ata_port_operations *cur; |
5672 | void **begin = (void **)ops; | |
5673 | void **end = (void **)&ops->inherits; | |
5674 | void **pp; | |
5675 | ||
5676 | if (!ops || !ops->inherits) | |
5677 | return; | |
5678 | ||
5679 | spin_lock(&lock); | |
5680 | ||
5681 | for (cur = ops->inherits; cur; cur = cur->inherits) { | |
5682 | void **inherit = (void **)cur; | |
5683 | ||
5684 | for (pp = begin; pp < end; pp++, inherit++) | |
5685 | if (!*pp) | |
5686 | *pp = *inherit; | |
5687 | } | |
5688 | ||
5689 | for (pp = begin; pp < end; pp++) | |
5690 | if (IS_ERR(*pp)) | |
5691 | *pp = NULL; | |
5692 | ||
5693 | ops->inherits = NULL; | |
5694 | ||
5695 | spin_unlock(&lock); | |
5696 | } | |
5697 | ||
ecef7253 TH |
5698 | /** |
5699 | * ata_host_start - start and freeze ports of an ATA host | |
5700 | * @host: ATA host to start ports for | |
5701 | * | |
5702 | * Start and then freeze ports of @host. Started status is | |
5703 | * recorded in host->flags, so this function can be called | |
5704 | * multiple times. Ports are guaranteed to get started only | |
f3187195 TH |
5705 | * once. If host->ops isn't initialized yet, its set to the |
5706 | * first non-dummy port ops. | |
ecef7253 TH |
5707 | * |
5708 | * LOCKING: | |
5709 | * Inherited from calling layer (may sleep). | |
5710 | * | |
5711 | * RETURNS: | |
5712 | * 0 if all ports are started successfully, -errno otherwise. | |
5713 | */ | |
5714 | int ata_host_start(struct ata_host *host) | |
5715 | { | |
32ebbc0c TH |
5716 | int have_stop = 0; |
5717 | void *start_dr = NULL; | |
ecef7253 TH |
5718 | int i, rc; |
5719 | ||
5720 | if (host->flags & ATA_HOST_STARTED) | |
5721 | return 0; | |
5722 | ||
029cfd6b TH |
5723 | ata_finalize_port_ops(host->ops); |
5724 | ||
ecef7253 TH |
5725 | for (i = 0; i < host->n_ports; i++) { |
5726 | struct ata_port *ap = host->ports[i]; | |
5727 | ||
029cfd6b TH |
5728 | ata_finalize_port_ops(ap->ops); |
5729 | ||
f3187195 TH |
5730 | if (!host->ops && !ata_port_is_dummy(ap)) |
5731 | host->ops = ap->ops; | |
5732 | ||
32ebbc0c TH |
5733 | if (ap->ops->port_stop) |
5734 | have_stop = 1; | |
5735 | } | |
5736 | ||
5737 | if (host->ops->host_stop) | |
5738 | have_stop = 1; | |
5739 | ||
5740 | if (have_stop) { | |
5741 | start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); | |
5742 | if (!start_dr) | |
5743 | return -ENOMEM; | |
5744 | } | |
5745 | ||
5746 | for (i = 0; i < host->n_ports; i++) { | |
5747 | struct ata_port *ap = host->ports[i]; | |
5748 | ||
ecef7253 TH |
5749 | if (ap->ops->port_start) { |
5750 | rc = ap->ops->port_start(ap); | |
5751 | if (rc) { | |
0f9fe9b7 | 5752 | if (rc != -ENODEV) |
0f757743 AM |
5753 | dev_printk(KERN_ERR, host->dev, |
5754 | "failed to start port %d " | |
5755 | "(errno=%d)\n", i, rc); | |
ecef7253 TH |
5756 | goto err_out; |
5757 | } | |
5758 | } | |
ecef7253 TH |
5759 | ata_eh_freeze_port(ap); |
5760 | } | |
5761 | ||
32ebbc0c TH |
5762 | if (start_dr) |
5763 | devres_add(host->dev, start_dr); | |
ecef7253 TH |
5764 | host->flags |= ATA_HOST_STARTED; |
5765 | return 0; | |
5766 | ||
5767 | err_out: | |
5768 | while (--i >= 0) { | |
5769 | struct ata_port *ap = host->ports[i]; | |
5770 | ||
5771 | if (ap->ops->port_stop) | |
5772 | ap->ops->port_stop(ap); | |
5773 | } | |
32ebbc0c | 5774 | devres_free(start_dr); |
ecef7253 TH |
5775 | return rc; |
5776 | } | |
5777 | ||
b03732f0 | 5778 | /** |
cca3974e JG |
5779 | * ata_sas_host_init - Initialize a host struct |
5780 | * @host: host to initialize | |
5781 | * @dev: device host is attached to | |
5782 | * @flags: host flags | |
5783 | * @ops: port_ops | |
b03732f0 BK |
5784 | * |
5785 | * LOCKING: | |
5786 | * PCI/etc. bus probe sem. | |
5787 | * | |
5788 | */ | |
f3187195 | 5789 | /* KILLME - the only user left is ipr */ |
cca3974e | 5790 | void ata_host_init(struct ata_host *host, struct device *dev, |
029cfd6b | 5791 | unsigned long flags, struct ata_port_operations *ops) |
b03732f0 | 5792 | { |
cca3974e JG |
5793 | spin_lock_init(&host->lock); |
5794 | host->dev = dev; | |
5795 | host->flags = flags; | |
5796 | host->ops = ops; | |
b03732f0 BK |
5797 | } |
5798 | ||
f3187195 TH |
5799 | /** |
5800 | * ata_host_register - register initialized ATA host | |
5801 | * @host: ATA host to register | |
5802 | * @sht: template for SCSI host | |
5803 | * | |
5804 | * Register initialized ATA host. @host is allocated using | |
5805 | * ata_host_alloc() and fully initialized by LLD. This function | |
5806 | * starts ports, registers @host with ATA and SCSI layers and | |
5807 | * probe registered devices. | |
5808 | * | |
5809 | * LOCKING: | |
5810 | * Inherited from calling layer (may sleep). | |
5811 | * | |
5812 | * RETURNS: | |
5813 | * 0 on success, -errno otherwise. | |
5814 | */ | |
5815 | int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) | |
5816 | { | |
5817 | int i, rc; | |
5818 | ||
5819 | /* host must have been started */ | |
5820 | if (!(host->flags & ATA_HOST_STARTED)) { | |
5821 | dev_printk(KERN_ERR, host->dev, | |
5822 | "BUG: trying to register unstarted host\n"); | |
5823 | WARN_ON(1); | |
5824 | return -EINVAL; | |
5825 | } | |
5826 | ||
5827 | /* Blow away unused ports. This happens when LLD can't | |
5828 | * determine the exact number of ports to allocate at | |
5829 | * allocation time. | |
5830 | */ | |
5831 | for (i = host->n_ports; host->ports[i]; i++) | |
5832 | kfree(host->ports[i]); | |
5833 | ||
5834 | /* give ports names and add SCSI hosts */ | |
5835 | for (i = 0; i < host->n_ports; i++) | |
5836 | host->ports[i]->print_id = ata_print_id++; | |
5837 | ||
5838 | rc = ata_scsi_add_hosts(host, sht); | |
5839 | if (rc) | |
5840 | return rc; | |
5841 | ||
fafbae87 TH |
5842 | /* associate with ACPI nodes */ |
5843 | ata_acpi_associate(host); | |
5844 | ||
f3187195 TH |
5845 | /* set cable, sata_spd_limit and report */ |
5846 | for (i = 0; i < host->n_ports; i++) { | |
5847 | struct ata_port *ap = host->ports[i]; | |
f3187195 TH |
5848 | unsigned long xfer_mask; |
5849 | ||
5850 | /* set SATA cable type if still unset */ | |
5851 | if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) | |
5852 | ap->cbl = ATA_CBL_SATA; | |
5853 | ||
5854 | /* init sata_spd_limit to the current value */ | |
4fb37a25 | 5855 | sata_link_init_spd(&ap->link); |
b1c72916 TH |
5856 | if (ap->slave_link) |
5857 | sata_link_init_spd(ap->slave_link); | |
f3187195 | 5858 | |
cbcdd875 | 5859 | /* print per-port info to dmesg */ |
f3187195 TH |
5860 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, |
5861 | ap->udma_mask); | |
5862 | ||
abf6e8ed | 5863 | if (!ata_port_is_dummy(ap)) { |
cbcdd875 TH |
5864 | ata_port_printk(ap, KERN_INFO, |
5865 | "%cATA max %s %s\n", | |
a16abc0b | 5866 | (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', |
f3187195 | 5867 | ata_mode_string(xfer_mask), |
cbcdd875 | 5868 | ap->link.eh_info.desc); |
abf6e8ed TH |
5869 | ata_ehi_clear_desc(&ap->link.eh_info); |
5870 | } else | |
f3187195 TH |
5871 | ata_port_printk(ap, KERN_INFO, "DUMMY\n"); |
5872 | } | |
5873 | ||
5874 | /* perform each probe synchronously */ | |
5875 | DPRINTK("probe begin\n"); | |
5876 | for (i = 0; i < host->n_ports; i++) { | |
5877 | struct ata_port *ap = host->ports[i]; | |
f3187195 TH |
5878 | |
5879 | /* probe */ | |
5880 | if (ap->ops->error_handler) { | |
9af5c9c9 | 5881 | struct ata_eh_info *ehi = &ap->link.eh_info; |
f3187195 TH |
5882 | unsigned long flags; |
5883 | ||
5884 | ata_port_probe(ap); | |
5885 | ||
5886 | /* kick EH for boot probing */ | |
5887 | spin_lock_irqsave(ap->lock, flags); | |
5888 | ||
b558eddd | 5889 | ehi->probe_mask |= ATA_ALL_DEVICES; |
391191c1 | 5890 | ehi->action |= ATA_EH_RESET | ATA_EH_LPM; |
f3187195 TH |
5891 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; |
5892 | ||
f4d6d004 | 5893 | ap->pflags &= ~ATA_PFLAG_INITIALIZING; |
f3187195 TH |
5894 | ap->pflags |= ATA_PFLAG_LOADING; |
5895 | ata_port_schedule_eh(ap); | |
5896 | ||
5897 | spin_unlock_irqrestore(ap->lock, flags); | |
5898 | ||
5899 | /* wait for EH to finish */ | |
5900 | ata_port_wait_eh(ap); | |
5901 | } else { | |
5902 | DPRINTK("ata%u: bus probe begin\n", ap->print_id); | |
5903 | rc = ata_bus_probe(ap); | |
5904 | DPRINTK("ata%u: bus probe end\n", ap->print_id); | |
5905 | ||
5906 | if (rc) { | |
5907 | /* FIXME: do something useful here? | |
5908 | * Current libata behavior will | |
5909 | * tear down everything when | |
5910 | * the module is removed | |
5911 | * or the h/w is unplugged. | |
5912 | */ | |
5913 | } | |
5914 | } | |
5915 | } | |
5916 | ||
5917 | /* probes are done, now scan each port's disk(s) */ | |
5918 | DPRINTK("host probe begin\n"); | |
5919 | for (i = 0; i < host->n_ports; i++) { | |
5920 | struct ata_port *ap = host->ports[i]; | |
5921 | ||
1ae46317 | 5922 | ata_scsi_scan_host(ap, 1); |
f3187195 TH |
5923 | } |
5924 | ||
5925 | return 0; | |
5926 | } | |
5927 | ||
f5cda257 TH |
5928 | /** |
5929 | * ata_host_activate - start host, request IRQ and register it | |
5930 | * @host: target ATA host | |
5931 | * @irq: IRQ to request | |
5932 | * @irq_handler: irq_handler used when requesting IRQ | |
5933 | * @irq_flags: irq_flags used when requesting IRQ | |
5934 | * @sht: scsi_host_template to use when registering the host | |
5935 | * | |
5936 | * After allocating an ATA host and initializing it, most libata | |
5937 | * LLDs perform three steps to activate the host - start host, | |
5938 | * request IRQ and register it. This helper takes necessasry | |
5939 | * arguments and performs the three steps in one go. | |
5940 | * | |
3d46b2e2 PM |
5941 | * An invalid IRQ skips the IRQ registration and expects the host to |
5942 | * have set polling mode on the port. In this case, @irq_handler | |
5943 | * should be NULL. | |
5944 | * | |
f5cda257 TH |
5945 | * LOCKING: |
5946 | * Inherited from calling layer (may sleep). | |
5947 | * | |
5948 | * RETURNS: | |
5949 | * 0 on success, -errno otherwise. | |
5950 | */ | |
5951 | int ata_host_activate(struct ata_host *host, int irq, | |
5952 | irq_handler_t irq_handler, unsigned long irq_flags, | |
5953 | struct scsi_host_template *sht) | |
5954 | { | |
cbcdd875 | 5955 | int i, rc; |
f5cda257 TH |
5956 | |
5957 | rc = ata_host_start(host); | |
5958 | if (rc) | |
5959 | return rc; | |
5960 | ||
3d46b2e2 PM |
5961 | /* Special case for polling mode */ |
5962 | if (!irq) { | |
5963 | WARN_ON(irq_handler); | |
5964 | return ata_host_register(host, sht); | |
5965 | } | |
5966 | ||
f5cda257 TH |
5967 | rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, |
5968 | dev_driver_string(host->dev), host); | |
5969 | if (rc) | |
5970 | return rc; | |
5971 | ||
cbcdd875 TH |
5972 | for (i = 0; i < host->n_ports; i++) |
5973 | ata_port_desc(host->ports[i], "irq %d", irq); | |
4031826b | 5974 | |
f5cda257 TH |
5975 | rc = ata_host_register(host, sht); |
5976 | /* if failed, just free the IRQ and leave ports alone */ | |
5977 | if (rc) | |
5978 | devm_free_irq(host->dev, irq, host); | |
5979 | ||
5980 | return rc; | |
5981 | } | |
5982 | ||
720ba126 TH |
5983 | /** |
5984 | * ata_port_detach - Detach ATA port in prepration of device removal | |
5985 | * @ap: ATA port to be detached | |
5986 | * | |
5987 | * Detach all ATA devices and the associated SCSI devices of @ap; | |
5988 | * then, remove the associated SCSI host. @ap is guaranteed to | |
5989 | * be quiescent on return from this function. | |
5990 | * | |
5991 | * LOCKING: | |
5992 | * Kernel thread context (may sleep). | |
5993 | */ | |
741b7763 | 5994 | static void ata_port_detach(struct ata_port *ap) |
720ba126 TH |
5995 | { |
5996 | unsigned long flags; | |
41bda9c9 | 5997 | struct ata_link *link; |
f58229f8 | 5998 | struct ata_device *dev; |
720ba126 TH |
5999 | |
6000 | if (!ap->ops->error_handler) | |
c3cf30a9 | 6001 | goto skip_eh; |
720ba126 TH |
6002 | |
6003 | /* tell EH we're leaving & flush EH */ | |
ba6a1308 | 6004 | spin_lock_irqsave(ap->lock, flags); |
b51e9e5d | 6005 | ap->pflags |= ATA_PFLAG_UNLOADING; |
ba6a1308 | 6006 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
6007 | |
6008 | ata_port_wait_eh(ap); | |
6009 | ||
7f9ad9b8 | 6010 | /* EH is now guaranteed to see UNLOADING - EH context belongs |
d127ea7b | 6011 | * to us. Restore SControl and disable all existing devices. |
720ba126 | 6012 | */ |
d127ea7b | 6013 | __ata_port_for_each_link(link, ap) { |
299246f9 | 6014 | sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0); |
41bda9c9 TH |
6015 | ata_link_for_each_dev(dev, link) |
6016 | ata_dev_disable(dev); | |
6017 | } | |
720ba126 | 6018 | |
720ba126 TH |
6019 | /* Final freeze & EH. All in-flight commands are aborted. EH |
6020 | * will be skipped and retrials will be terminated with bad | |
6021 | * target. | |
6022 | */ | |
ba6a1308 | 6023 | spin_lock_irqsave(ap->lock, flags); |
720ba126 | 6024 | ata_port_freeze(ap); /* won't be thawed */ |
ba6a1308 | 6025 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
6026 | |
6027 | ata_port_wait_eh(ap); | |
45a66c1c | 6028 | cancel_rearming_delayed_work(&ap->hotplug_task); |
720ba126 | 6029 | |
c3cf30a9 | 6030 | skip_eh: |
720ba126 | 6031 | /* remove the associated SCSI host */ |
cca3974e | 6032 | scsi_remove_host(ap->scsi_host); |
720ba126 TH |
6033 | } |
6034 | ||
0529c159 TH |
6035 | /** |
6036 | * ata_host_detach - Detach all ports of an ATA host | |
6037 | * @host: Host to detach | |
6038 | * | |
6039 | * Detach all ports of @host. | |
6040 | * | |
6041 | * LOCKING: | |
6042 | * Kernel thread context (may sleep). | |
6043 | */ | |
6044 | void ata_host_detach(struct ata_host *host) | |
6045 | { | |
6046 | int i; | |
6047 | ||
6048 | for (i = 0; i < host->n_ports; i++) | |
6049 | ata_port_detach(host->ports[i]); | |
562f0c2d TH |
6050 | |
6051 | /* the host is dead now, dissociate ACPI */ | |
6052 | ata_acpi_dissociate(host); | |
0529c159 TH |
6053 | } |
6054 | ||
374b1873 JG |
6055 | #ifdef CONFIG_PCI |
6056 | ||
1da177e4 LT |
6057 | /** |
6058 | * ata_pci_remove_one - PCI layer callback for device removal | |
6059 | * @pdev: PCI device that was removed | |
6060 | * | |
b878ca5d TH |
6061 | * PCI layer indicates to libata via this hook that hot-unplug or |
6062 | * module unload event has occurred. Detach all ports. Resource | |
6063 | * release is handled via devres. | |
1da177e4 LT |
6064 | * |
6065 | * LOCKING: | |
6066 | * Inherited from PCI layer (may sleep). | |
6067 | */ | |
f0d36efd | 6068 | void ata_pci_remove_one(struct pci_dev *pdev) |
1da177e4 | 6069 | { |
2855568b | 6070 | struct device *dev = &pdev->dev; |
cca3974e | 6071 | struct ata_host *host = dev_get_drvdata(dev); |
1da177e4 | 6072 | |
b878ca5d | 6073 | ata_host_detach(host); |
1da177e4 LT |
6074 | } |
6075 | ||
6076 | /* move to PCI subsystem */ | |
057ace5e | 6077 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
6078 | { |
6079 | unsigned long tmp = 0; | |
6080 | ||
6081 | switch (bits->width) { | |
6082 | case 1: { | |
6083 | u8 tmp8 = 0; | |
6084 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
6085 | tmp = tmp8; | |
6086 | break; | |
6087 | } | |
6088 | case 2: { | |
6089 | u16 tmp16 = 0; | |
6090 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
6091 | tmp = tmp16; | |
6092 | break; | |
6093 | } | |
6094 | case 4: { | |
6095 | u32 tmp32 = 0; | |
6096 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
6097 | tmp = tmp32; | |
6098 | break; | |
6099 | } | |
6100 | ||
6101 | default: | |
6102 | return -EINVAL; | |
6103 | } | |
6104 | ||
6105 | tmp &= bits->mask; | |
6106 | ||
6107 | return (tmp == bits->val) ? 1 : 0; | |
6108 | } | |
9b847548 | 6109 | |
6ffa01d8 | 6110 | #ifdef CONFIG_PM |
3c5100c1 | 6111 | void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) |
9b847548 JA |
6112 | { |
6113 | pci_save_state(pdev); | |
4c90d971 | 6114 | pci_disable_device(pdev); |
500530f6 | 6115 | |
3a2d5b70 | 6116 | if (mesg.event & PM_EVENT_SLEEP) |
500530f6 | 6117 | pci_set_power_state(pdev, PCI_D3hot); |
9b847548 JA |
6118 | } |
6119 | ||
553c4aa6 | 6120 | int ata_pci_device_do_resume(struct pci_dev *pdev) |
9b847548 | 6121 | { |
553c4aa6 TH |
6122 | int rc; |
6123 | ||
9b847548 JA |
6124 | pci_set_power_state(pdev, PCI_D0); |
6125 | pci_restore_state(pdev); | |
553c4aa6 | 6126 | |
b878ca5d | 6127 | rc = pcim_enable_device(pdev); |
553c4aa6 TH |
6128 | if (rc) { |
6129 | dev_printk(KERN_ERR, &pdev->dev, | |
6130 | "failed to enable device after resume (%d)\n", rc); | |
6131 | return rc; | |
6132 | } | |
6133 | ||
9b847548 | 6134 | pci_set_master(pdev); |
553c4aa6 | 6135 | return 0; |
500530f6 TH |
6136 | } |
6137 | ||
3c5100c1 | 6138 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) |
500530f6 | 6139 | { |
cca3974e | 6140 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
500530f6 TH |
6141 | int rc = 0; |
6142 | ||
cca3974e | 6143 | rc = ata_host_suspend(host, mesg); |
500530f6 TH |
6144 | if (rc) |
6145 | return rc; | |
6146 | ||
3c5100c1 | 6147 | ata_pci_device_do_suspend(pdev, mesg); |
500530f6 TH |
6148 | |
6149 | return 0; | |
6150 | } | |
6151 | ||
6152 | int ata_pci_device_resume(struct pci_dev *pdev) | |
6153 | { | |
cca3974e | 6154 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
553c4aa6 | 6155 | int rc; |
500530f6 | 6156 | |
553c4aa6 TH |
6157 | rc = ata_pci_device_do_resume(pdev); |
6158 | if (rc == 0) | |
6159 | ata_host_resume(host); | |
6160 | return rc; | |
9b847548 | 6161 | } |
6ffa01d8 TH |
6162 | #endif /* CONFIG_PM */ |
6163 | ||
1da177e4 LT |
6164 | #endif /* CONFIG_PCI */ |
6165 | ||
33267325 TH |
6166 | static int __init ata_parse_force_one(char **cur, |
6167 | struct ata_force_ent *force_ent, | |
6168 | const char **reason) | |
6169 | { | |
6170 | /* FIXME: Currently, there's no way to tag init const data and | |
6171 | * using __initdata causes build failure on some versions of | |
6172 | * gcc. Once __initdataconst is implemented, add const to the | |
6173 | * following structure. | |
6174 | */ | |
6175 | static struct ata_force_param force_tbl[] __initdata = { | |
6176 | { "40c", .cbl = ATA_CBL_PATA40 }, | |
6177 | { "80c", .cbl = ATA_CBL_PATA80 }, | |
6178 | { "short40c", .cbl = ATA_CBL_PATA40_SHORT }, | |
6179 | { "unk", .cbl = ATA_CBL_PATA_UNK }, | |
6180 | { "ign", .cbl = ATA_CBL_PATA_IGN }, | |
6181 | { "sata", .cbl = ATA_CBL_SATA }, | |
6182 | { "1.5Gbps", .spd_limit = 1 }, | |
6183 | { "3.0Gbps", .spd_limit = 2 }, | |
6184 | { "noncq", .horkage_on = ATA_HORKAGE_NONCQ }, | |
6185 | { "ncq", .horkage_off = ATA_HORKAGE_NONCQ }, | |
6186 | { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) }, | |
6187 | { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) }, | |
6188 | { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) }, | |
6189 | { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) }, | |
6190 | { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) }, | |
6191 | { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) }, | |
6192 | { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) }, | |
6193 | { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) }, | |
6194 | { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) }, | |
6195 | { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) }, | |
6196 | { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) }, | |
6197 | { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) }, | |
6198 | { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
6199 | { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
6200 | { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
6201 | { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
6202 | { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
6203 | { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
6204 | { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
6205 | { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
6206 | { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
6207 | { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
6208 | { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
6209 | { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
6210 | { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
6211 | { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
6212 | { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
6213 | { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
6214 | { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
6215 | { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
6216 | { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
6217 | { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
6218 | { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
6219 | { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) }, | |
05944bdf TH |
6220 | { "nohrst", .lflags = ATA_LFLAG_NO_HRST }, |
6221 | { "nosrst", .lflags = ATA_LFLAG_NO_SRST }, | |
6222 | { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST }, | |
33267325 TH |
6223 | }; |
6224 | char *start = *cur, *p = *cur; | |
6225 | char *id, *val, *endp; | |
6226 | const struct ata_force_param *match_fp = NULL; | |
6227 | int nr_matches = 0, i; | |
6228 | ||
6229 | /* find where this param ends and update *cur */ | |
6230 | while (*p != '\0' && *p != ',') | |
6231 | p++; | |
6232 | ||
6233 | if (*p == '\0') | |
6234 | *cur = p; | |
6235 | else | |
6236 | *cur = p + 1; | |
6237 | ||
6238 | *p = '\0'; | |
6239 | ||
6240 | /* parse */ | |
6241 | p = strchr(start, ':'); | |
6242 | if (!p) { | |
6243 | val = strstrip(start); | |
6244 | goto parse_val; | |
6245 | } | |
6246 | *p = '\0'; | |
6247 | ||
6248 | id = strstrip(start); | |
6249 | val = strstrip(p + 1); | |
6250 | ||
6251 | /* parse id */ | |
6252 | p = strchr(id, '.'); | |
6253 | if (p) { | |
6254 | *p++ = '\0'; | |
6255 | force_ent->device = simple_strtoul(p, &endp, 10); | |
6256 | if (p == endp || *endp != '\0') { | |
6257 | *reason = "invalid device"; | |
6258 | return -EINVAL; | |
6259 | } | |
6260 | } | |
6261 | ||
6262 | force_ent->port = simple_strtoul(id, &endp, 10); | |
6263 | if (p == endp || *endp != '\0') { | |
6264 | *reason = "invalid port/link"; | |
6265 | return -EINVAL; | |
6266 | } | |
6267 | ||
6268 | parse_val: | |
6269 | /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */ | |
6270 | for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { | |
6271 | const struct ata_force_param *fp = &force_tbl[i]; | |
6272 | ||
6273 | if (strncasecmp(val, fp->name, strlen(val))) | |
6274 | continue; | |
6275 | ||
6276 | nr_matches++; | |
6277 | match_fp = fp; | |
6278 | ||
6279 | if (strcasecmp(val, fp->name) == 0) { | |
6280 | nr_matches = 1; | |
6281 | break; | |
6282 | } | |
6283 | } | |
6284 | ||
6285 | if (!nr_matches) { | |
6286 | *reason = "unknown value"; | |
6287 | return -EINVAL; | |
6288 | } | |
6289 | if (nr_matches > 1) { | |
6290 | *reason = "ambigious value"; | |
6291 | return -EINVAL; | |
6292 | } | |
6293 | ||
6294 | force_ent->param = *match_fp; | |
6295 | ||
6296 | return 0; | |
6297 | } | |
6298 | ||
6299 | static void __init ata_parse_force_param(void) | |
6300 | { | |
6301 | int idx = 0, size = 1; | |
6302 | int last_port = -1, last_device = -1; | |
6303 | char *p, *cur, *next; | |
6304 | ||
6305 | /* calculate maximum number of params and allocate force_tbl */ | |
6306 | for (p = ata_force_param_buf; *p; p++) | |
6307 | if (*p == ',') | |
6308 | size++; | |
6309 | ||
6310 | ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL); | |
6311 | if (!ata_force_tbl) { | |
6312 | printk(KERN_WARNING "ata: failed to extend force table, " | |
6313 | "libata.force ignored\n"); | |
6314 | return; | |
6315 | } | |
6316 | ||
6317 | /* parse and populate the table */ | |
6318 | for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { | |
6319 | const char *reason = ""; | |
6320 | struct ata_force_ent te = { .port = -1, .device = -1 }; | |
6321 | ||
6322 | next = cur; | |
6323 | if (ata_parse_force_one(&next, &te, &reason)) { | |
6324 | printk(KERN_WARNING "ata: failed to parse force " | |
6325 | "parameter \"%s\" (%s)\n", | |
6326 | cur, reason); | |
6327 | continue; | |
6328 | } | |
6329 | ||
6330 | if (te.port == -1) { | |
6331 | te.port = last_port; | |
6332 | te.device = last_device; | |
6333 | } | |
6334 | ||
6335 | ata_force_tbl[idx++] = te; | |
6336 | ||
6337 | last_port = te.port; | |
6338 | last_device = te.device; | |
6339 | } | |
6340 | ||
6341 | ata_force_tbl_size = idx; | |
6342 | } | |
1da177e4 | 6343 | |
1da177e4 LT |
6344 | static int __init ata_init(void) |
6345 | { | |
33267325 TH |
6346 | ata_parse_force_param(); |
6347 | ||
1da177e4 LT |
6348 | ata_wq = create_workqueue("ata"); |
6349 | if (!ata_wq) | |
49ea3b04 | 6350 | goto free_force_tbl; |
1da177e4 | 6351 | |
453b07ac | 6352 | ata_aux_wq = create_singlethread_workqueue("ata_aux"); |
49ea3b04 EO |
6353 | if (!ata_aux_wq) |
6354 | goto free_wq; | |
453b07ac | 6355 | |
1da177e4 LT |
6356 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
6357 | return 0; | |
49ea3b04 EO |
6358 | |
6359 | free_wq: | |
6360 | destroy_workqueue(ata_wq); | |
6361 | free_force_tbl: | |
6362 | kfree(ata_force_tbl); | |
6363 | return -ENOMEM; | |
1da177e4 LT |
6364 | } |
6365 | ||
6366 | static void __exit ata_exit(void) | |
6367 | { | |
33267325 | 6368 | kfree(ata_force_tbl); |
1da177e4 | 6369 | destroy_workqueue(ata_wq); |
453b07ac | 6370 | destroy_workqueue(ata_aux_wq); |
1da177e4 LT |
6371 | } |
6372 | ||
a4625085 | 6373 | subsys_initcall(ata_init); |
1da177e4 LT |
6374 | module_exit(ata_exit); |
6375 | ||
67846b30 | 6376 | static unsigned long ratelimit_time; |
34af946a | 6377 | static DEFINE_SPINLOCK(ata_ratelimit_lock); |
67846b30 JG |
6378 | |
6379 | int ata_ratelimit(void) | |
6380 | { | |
6381 | int rc; | |
6382 | unsigned long flags; | |
6383 | ||
6384 | spin_lock_irqsave(&ata_ratelimit_lock, flags); | |
6385 | ||
6386 | if (time_after(jiffies, ratelimit_time)) { | |
6387 | rc = 1; | |
6388 | ratelimit_time = jiffies + (HZ/5); | |
6389 | } else | |
6390 | rc = 0; | |
6391 | ||
6392 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); | |
6393 | ||
6394 | return rc; | |
6395 | } | |
6396 | ||
c22daff4 TH |
6397 | /** |
6398 | * ata_wait_register - wait until register value changes | |
6399 | * @reg: IO-mapped register | |
6400 | * @mask: Mask to apply to read register value | |
6401 | * @val: Wait condition | |
341c2c95 TH |
6402 | * @interval: polling interval in milliseconds |
6403 | * @timeout: timeout in milliseconds | |
c22daff4 TH |
6404 | * |
6405 | * Waiting for some bits of register to change is a common | |
6406 | * operation for ATA controllers. This function reads 32bit LE | |
6407 | * IO-mapped register @reg and tests for the following condition. | |
6408 | * | |
6409 | * (*@reg & mask) != val | |
6410 | * | |
6411 | * If the condition is met, it returns; otherwise, the process is | |
6412 | * repeated after @interval_msec until timeout. | |
6413 | * | |
6414 | * LOCKING: | |
6415 | * Kernel thread context (may sleep) | |
6416 | * | |
6417 | * RETURNS: | |
6418 | * The final register value. | |
6419 | */ | |
6420 | u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, | |
341c2c95 | 6421 | unsigned long interval, unsigned long timeout) |
c22daff4 | 6422 | { |
341c2c95 | 6423 | unsigned long deadline; |
c22daff4 TH |
6424 | u32 tmp; |
6425 | ||
6426 | tmp = ioread32(reg); | |
6427 | ||
6428 | /* Calculate timeout _after_ the first read to make sure | |
6429 | * preceding writes reach the controller before starting to | |
6430 | * eat away the timeout. | |
6431 | */ | |
341c2c95 | 6432 | deadline = ata_deadline(jiffies, timeout); |
c22daff4 | 6433 | |
341c2c95 TH |
6434 | while ((tmp & mask) == val && time_before(jiffies, deadline)) { |
6435 | msleep(interval); | |
c22daff4 TH |
6436 | tmp = ioread32(reg); |
6437 | } | |
6438 | ||
6439 | return tmp; | |
6440 | } | |
6441 | ||
dd5b06c4 TH |
6442 | /* |
6443 | * Dummy port_ops | |
6444 | */ | |
182d7bba | 6445 | static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) |
dd5b06c4 | 6446 | { |
182d7bba | 6447 | return AC_ERR_SYSTEM; |
dd5b06c4 TH |
6448 | } |
6449 | ||
182d7bba | 6450 | static void ata_dummy_error_handler(struct ata_port *ap) |
dd5b06c4 | 6451 | { |
182d7bba | 6452 | /* truly dummy */ |
dd5b06c4 TH |
6453 | } |
6454 | ||
029cfd6b | 6455 | struct ata_port_operations ata_dummy_port_ops = { |
dd5b06c4 TH |
6456 | .qc_prep = ata_noop_qc_prep, |
6457 | .qc_issue = ata_dummy_qc_issue, | |
182d7bba | 6458 | .error_handler = ata_dummy_error_handler, |
dd5b06c4 TH |
6459 | }; |
6460 | ||
21b0ad4f TH |
6461 | const struct ata_port_info ata_dummy_port_info = { |
6462 | .port_ops = &ata_dummy_port_ops, | |
6463 | }; | |
6464 | ||
1da177e4 LT |
6465 | /* |
6466 | * libata is essentially a library of internal helper functions for | |
6467 | * low-level ATA host controller drivers. As such, the API/ABI is | |
6468 | * likely to change as new drivers are added and updated. | |
6469 | * Do not depend on ABI/API stability. | |
6470 | */ | |
e9c83914 TH |
6471 | EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
6472 | EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); | |
6473 | EXPORT_SYMBOL_GPL(sata_deb_timing_long); | |
029cfd6b TH |
6474 | EXPORT_SYMBOL_GPL(ata_base_port_ops); |
6475 | EXPORT_SYMBOL_GPL(sata_port_ops); | |
dd5b06c4 | 6476 | EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
21b0ad4f | 6477 | EXPORT_SYMBOL_GPL(ata_dummy_port_info); |
aadffb68 | 6478 | EXPORT_SYMBOL_GPL(__ata_port_next_link); |
1da177e4 | 6479 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
cca3974e | 6480 | EXPORT_SYMBOL_GPL(ata_host_init); |
f3187195 | 6481 | EXPORT_SYMBOL_GPL(ata_host_alloc); |
f5cda257 | 6482 | EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); |
b1c72916 | 6483 | EXPORT_SYMBOL_GPL(ata_slave_link_init); |
ecef7253 | 6484 | EXPORT_SYMBOL_GPL(ata_host_start); |
f3187195 | 6485 | EXPORT_SYMBOL_GPL(ata_host_register); |
f5cda257 | 6486 | EXPORT_SYMBOL_GPL(ata_host_activate); |
0529c159 | 6487 | EXPORT_SYMBOL_GPL(ata_host_detach); |
1da177e4 | 6488 | EXPORT_SYMBOL_GPL(ata_sg_init); |
f686bcb8 | 6489 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
dedaf2b0 | 6490 | EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); |
436d34b3 | 6491 | EXPORT_SYMBOL_GPL(atapi_cmd_type); |
1da177e4 LT |
6492 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
6493 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
6357357c TH |
6494 | EXPORT_SYMBOL_GPL(ata_pack_xfermask); |
6495 | EXPORT_SYMBOL_GPL(ata_unpack_xfermask); | |
6496 | EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); | |
6497 | EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); | |
6498 | EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); | |
6499 | EXPORT_SYMBOL_GPL(ata_mode_string); | |
6500 | EXPORT_SYMBOL_GPL(ata_id_xfermask); | |
1da177e4 | 6501 | EXPORT_SYMBOL_GPL(ata_port_start); |
04351821 | 6502 | EXPORT_SYMBOL_GPL(ata_do_set_mode); |
31cc23b3 | 6503 | EXPORT_SYMBOL_GPL(ata_std_qc_defer); |
e46834cd | 6504 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
1da177e4 | 6505 | EXPORT_SYMBOL_GPL(ata_port_probe); |
10305f0f | 6506 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
3c567b7d | 6507 | EXPORT_SYMBOL_GPL(sata_set_spd); |
aa2731ad | 6508 | EXPORT_SYMBOL_GPL(ata_wait_after_reset); |
936fd732 TH |
6509 | EXPORT_SYMBOL_GPL(sata_link_debounce); |
6510 | EXPORT_SYMBOL_GPL(sata_link_resume); | |
0aa1113d | 6511 | EXPORT_SYMBOL_GPL(ata_std_prereset); |
cc0680a5 | 6512 | EXPORT_SYMBOL_GPL(sata_link_hardreset); |
57c9efdf | 6513 | EXPORT_SYMBOL_GPL(sata_std_hardreset); |
203c75b8 | 6514 | EXPORT_SYMBOL_GPL(ata_std_postreset); |
2e9edbf8 JG |
6515 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
6516 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
1da177e4 | 6517 | EXPORT_SYMBOL_GPL(ata_port_disable); |
67846b30 | 6518 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
c22daff4 | 6519 | EXPORT_SYMBOL_GPL(ata_wait_register); |
1da177e4 LT |
6520 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
6521 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); | |
1da177e4 | 6522 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
83c47bcb | 6523 | EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); |
a6e6ce8e | 6524 | EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); |
34bf2170 TH |
6525 | EXPORT_SYMBOL_GPL(sata_scr_valid); |
6526 | EXPORT_SYMBOL_GPL(sata_scr_read); | |
6527 | EXPORT_SYMBOL_GPL(sata_scr_write); | |
6528 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); | |
936fd732 TH |
6529 | EXPORT_SYMBOL_GPL(ata_link_online); |
6530 | EXPORT_SYMBOL_GPL(ata_link_offline); | |
6ffa01d8 | 6531 | #ifdef CONFIG_PM |
cca3974e JG |
6532 | EXPORT_SYMBOL_GPL(ata_host_suspend); |
6533 | EXPORT_SYMBOL_GPL(ata_host_resume); | |
6ffa01d8 | 6534 | #endif /* CONFIG_PM */ |
6a62a04d TH |
6535 | EXPORT_SYMBOL_GPL(ata_id_string); |
6536 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
963e4975 | 6537 | EXPORT_SYMBOL_GPL(ata_do_dev_read_id); |
1da177e4 LT |
6538 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
6539 | ||
1bc4ccff | 6540 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
6357357c | 6541 | EXPORT_SYMBOL_GPL(ata_timing_find_mode); |
452503f9 AC |
6542 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
6543 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
a0f79b92 | 6544 | EXPORT_SYMBOL_GPL(ata_timing_cycle2mode); |
452503f9 | 6545 | |
1da177e4 LT |
6546 | #ifdef CONFIG_PCI |
6547 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
1da177e4 | 6548 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); |
6ffa01d8 | 6549 | #ifdef CONFIG_PM |
500530f6 TH |
6550 | EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
6551 | EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); | |
9b847548 JA |
6552 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
6553 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
6ffa01d8 | 6554 | #endif /* CONFIG_PM */ |
1da177e4 | 6555 | #endif /* CONFIG_PCI */ |
9b847548 | 6556 | |
b64bbc39 TH |
6557 | EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); |
6558 | EXPORT_SYMBOL_GPL(ata_ehi_push_desc); | |
6559 | EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); | |
cbcdd875 TH |
6560 | EXPORT_SYMBOL_GPL(ata_port_desc); |
6561 | #ifdef CONFIG_PCI | |
6562 | EXPORT_SYMBOL_GPL(ata_port_pbar_desc); | |
6563 | #endif /* CONFIG_PCI */ | |
7b70fc03 | 6564 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
dbd82616 | 6565 | EXPORT_SYMBOL_GPL(ata_link_abort); |
7b70fc03 | 6566 | EXPORT_SYMBOL_GPL(ata_port_abort); |
e3180499 | 6567 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
7d77b247 | 6568 | EXPORT_SYMBOL_GPL(sata_async_notification); |
e3180499 TH |
6569 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
6570 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); | |
ece1d636 TH |
6571 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
6572 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
10acf3b0 | 6573 | EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error); |
022bdb07 | 6574 | EXPORT_SYMBOL_GPL(ata_do_eh); |
a1efdaba | 6575 | EXPORT_SYMBOL_GPL(ata_std_error_handler); |
be0d18df AC |
6576 | |
6577 | EXPORT_SYMBOL_GPL(ata_cable_40wire); | |
6578 | EXPORT_SYMBOL_GPL(ata_cable_80wire); | |
6579 | EXPORT_SYMBOL_GPL(ata_cable_unknown); | |
c88f90c3 | 6580 | EXPORT_SYMBOL_GPL(ata_cable_ignore); |
be0d18df | 6581 | EXPORT_SYMBOL_GPL(ata_cable_sata); |