Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * dc395x.c | |
3 | * | |
4 | * Device Driver for Tekram DC395(U/UW/F), DC315(U) | |
5 | * PCI SCSI Bus Master Host Adapter | |
6 | * (SCSI chip set used Tekram ASIC TRM-S1040) | |
7 | * | |
8 | * Authors: | |
9 | * C.L. Huang <ching@tekram.com.tw> | |
10 | * Erich Chen <erich@tekram.com.tw> | |
11 | * (C) Copyright 1995-1999 Tekram Technology Co., Ltd. | |
12 | * | |
13 | * Kurt Garloff <garloff@suse.de> | |
14 | * (C) 1999-2000 Kurt Garloff | |
15 | * | |
16 | * Oliver Neukum <oliver@neukum.name> | |
17 | * Ali Akcaagac <aliakc@web.de> | |
18 | * Jamie Lenehan <lenehan@twibble.org> | |
19 | * (C) 2003 | |
20 | * | |
21 | * License: GNU GPL | |
22 | * | |
23 | ************************************************************************* | |
24 | * | |
25 | * Redistribution and use in source and binary forms, with or without | |
26 | * modification, are permitted provided that the following conditions | |
27 | * are met: | |
28 | * 1. Redistributions of source code must retain the above copyright | |
29 | * notice, this list of conditions and the following disclaimer. | |
30 | * 2. Redistributions in binary form must reproduce the above copyright | |
31 | * notice, this list of conditions and the following disclaimer in the | |
32 | * documentation and/or other materials provided with the distribution. | |
33 | * 3. The name of the author may not be used to endorse or promote products | |
34 | * derived from this software without specific prior written permission. | |
35 | * | |
36 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
37 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
38 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
39 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
40 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
41 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
42 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
43 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
44 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
45 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
46 | * | |
47 | ************************************************************************ | |
48 | */ | |
49 | #include <linux/module.h> | |
50 | #include <linux/moduleparam.h> | |
51 | #include <linux/delay.h> | |
52 | #include <linux/ctype.h> | |
53 | #include <linux/blkdev.h> | |
54 | #include <linux/interrupt.h> | |
55 | #include <linux/init.h> | |
56 | #include <linux/spinlock.h> | |
57 | #include <linux/pci.h> | |
58 | #include <linux/list.h> | |
59 | #include <linux/vmalloc.h> | |
5a0e3ad6 | 60 | #include <linux/slab.h> |
1da177e4 LT |
61 | #include <asm/io.h> |
62 | ||
63 | #include <scsi/scsi.h> | |
1da177e4 LT |
64 | #include <scsi/scsi_cmnd.h> |
65 | #include <scsi/scsi_device.h> | |
66 | #include <scsi/scsi_host.h> | |
9c2d2670 | 67 | #include <scsi/scsi_transport_spi.h> |
1da177e4 LT |
68 | |
69 | #include "dc395x.h" | |
70 | ||
71 | #define DC395X_NAME "dc395x" | |
72 | #define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040" | |
73 | #define DC395X_VERSION "v2.05, 2004/03/08" | |
74 | ||
75 | /*--------------------------------------------------------------------------- | |
76 | Features | |
77 | ---------------------------------------------------------------------------*/ | |
78 | /* | |
79 | * Set to disable parts of the driver | |
80 | */ | |
81 | /*#define DC395x_NO_DISCONNECT*/ | |
82 | /*#define DC395x_NO_TAGQ*/ | |
83 | /*#define DC395x_NO_SYNC*/ | |
84 | /*#define DC395x_NO_WIDE*/ | |
85 | ||
86 | /*--------------------------------------------------------------------------- | |
87 | Debugging | |
88 | ---------------------------------------------------------------------------*/ | |
89 | /* | |
90 | * Types of debugging that can be enabled and disabled | |
91 | */ | |
92 | #define DBG_KG 0x0001 | |
93 | #define DBG_0 0x0002 | |
94 | #define DBG_1 0x0004 | |
95 | #define DBG_SG 0x0020 | |
96 | #define DBG_FIFO 0x0040 | |
97 | #define DBG_PIO 0x0080 | |
98 | ||
99 | ||
100 | /* | |
101 | * Set set of things to output debugging for. | |
102 | * Undefine to remove all debugging | |
103 | */ | |
104 | /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/ | |
105 | /*#define DEBUG_MASK DBG_0*/ | |
106 | ||
107 | ||
108 | /* | |
109 | * Output a kernel mesage at the specified level and append the | |
110 | * driver name and a ": " to the start of the message | |
111 | */ | |
112 | #define dprintkl(level, format, arg...) \ | |
113 | printk(level DC395X_NAME ": " format , ## arg) | |
114 | ||
115 | ||
116 | #ifdef DEBUG_MASK | |
117 | /* | |
118 | * print a debug message - this is formated with KERN_DEBUG, then the | |
119 | * driver name followed by a ": " and then the message is output. | |
120 | * This also checks that the specified debug level is enabled before | |
121 | * outputing the message | |
122 | */ | |
123 | #define dprintkdbg(type, format, arg...) \ | |
124 | do { \ | |
125 | if ((type) & (DEBUG_MASK)) \ | |
126 | dprintkl(KERN_DEBUG , format , ## arg); \ | |
127 | } while (0) | |
128 | ||
129 | /* | |
130 | * Check if the specified type of debugging is enabled | |
131 | */ | |
132 | #define debug_enabled(type) ((DEBUG_MASK) & (type)) | |
133 | ||
134 | #else | |
135 | /* | |
136 | * No debugging. Do nothing | |
137 | */ | |
138 | #define dprintkdbg(type, format, arg...) \ | |
139 | do {} while (0) | |
140 | #define debug_enabled(type) (0) | |
141 | ||
142 | #endif | |
143 | ||
144 | ||
145 | #ifndef PCI_VENDOR_ID_TEKRAM | |
146 | #define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */ | |
147 | #endif | |
148 | #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040 | |
149 | #define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */ | |
150 | #endif | |
151 | ||
152 | ||
153 | #define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags) | |
154 | #define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags) | |
155 | ||
156 | #define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address))) | |
157 | #define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address))) | |
158 | #define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address))) | |
159 | #define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address)) | |
160 | #define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address)) | |
161 | #define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address)) | |
162 | ||
1da177e4 LT |
163 | #define TAG_NONE 255 |
164 | ||
165 | /* | |
166 | * srb->segement_x is the hw sg list. It is always allocated as a | |
167 | * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not | |
168 | * cross a page boundy. | |
169 | */ | |
170 | #define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY) | |
b4b08e58 | 171 | |
1da177e4 LT |
172 | |
173 | struct SGentry { | |
174 | u32 address; /* bus! address */ | |
175 | u32 length; | |
176 | }; | |
177 | ||
178 | /* The SEEPROM structure for TRM_S1040 */ | |
179 | struct NVRamTarget { | |
180 | u8 cfg0; /* Target configuration byte 0 */ | |
181 | u8 period; /* Target period */ | |
182 | u8 cfg2; /* Target configuration byte 2 */ | |
183 | u8 cfg3; /* Target configuration byte 3 */ | |
184 | }; | |
185 | ||
186 | struct NvRamType { | |
187 | u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */ | |
188 | u8 sub_sys_id[2]; /* 2,3 Sub System ID */ | |
189 | u8 sub_class; /* 4 Sub Class */ | |
190 | u8 vendor_id[2]; /* 5,6 Vendor ID */ | |
191 | u8 device_id[2]; /* 7,8 Device ID */ | |
192 | u8 reserved; /* 9 Reserved */ | |
193 | struct NVRamTarget target[DC395x_MAX_SCSI_ID]; | |
194 | /** 10,11,12,13 | |
195 | ** 14,15,16,17 | |
196 | ** .... | |
197 | ** .... | |
198 | ** 70,71,72,73 | |
199 | */ | |
200 | u8 scsi_id; /* 74 Host Adapter SCSI ID */ | |
201 | u8 channel_cfg; /* 75 Channel configuration */ | |
202 | u8 delay_time; /* 76 Power on delay time */ | |
203 | u8 max_tag; /* 77 Maximum tags */ | |
204 | u8 reserved0; /* 78 */ | |
205 | u8 boot_target; /* 79 */ | |
206 | u8 boot_lun; /* 80 */ | |
207 | u8 reserved1; /* 81 */ | |
208 | u16 reserved2[22]; /* 82,..125 */ | |
209 | u16 cksum; /* 126,127 */ | |
210 | }; | |
211 | ||
212 | struct ScsiReqBlk { | |
213 | struct list_head list; /* next/prev ptrs for srb lists */ | |
214 | struct DeviceCtlBlk *dcb; | |
215 | struct scsi_cmnd *cmd; | |
216 | ||
217 | struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */ | |
cdb8c2a6 | 218 | dma_addr_t sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */ |
1da177e4 LT |
219 | |
220 | u8 sg_count; /* No of HW sg entries for this request */ | |
221 | u8 sg_index; /* Index of HW sg entry for this request */ | |
25985edc | 222 | size_t total_xfer_length; /* Total number of bytes remaining to be transferred */ |
cdb8c2a6 | 223 | size_t request_length; /* Total number of bytes in this request */ |
1da177e4 LT |
224 | /* |
225 | * The sense buffer handling function, request_sense, uses | |
226 | * the first hw sg entry (segment_x[0]) and the transfer | |
227 | * length (total_xfer_length). While doing this it stores the | |
228 | * original values into the last sg hw list | |
229 | * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the | |
230 | * total_xfer_length in xferred. These values are restored in | |
231 | * pci_unmap_srb_sense. This is the only place xferred is used. | |
232 | */ | |
cdb8c2a6 | 233 | size_t xferred; /* Saved copy of total_xfer_length */ |
1da177e4 LT |
234 | |
235 | u16 state; | |
236 | ||
237 | u8 msgin_buf[6]; | |
238 | u8 msgout_buf[6]; | |
239 | ||
240 | u8 adapter_status; | |
241 | u8 target_status; | |
242 | u8 msg_count; | |
243 | u8 end_message; | |
244 | ||
245 | u8 tag_number; | |
246 | u8 status; | |
247 | u8 retry_count; | |
248 | u8 flag; | |
249 | ||
250 | u8 scsi_phase; | |
251 | }; | |
252 | ||
253 | struct DeviceCtlBlk { | |
254 | struct list_head list; /* next/prev ptrs for the dcb list */ | |
255 | struct AdapterCtlBlk *acb; | |
256 | struct list_head srb_going_list; /* head of going srb list */ | |
257 | struct list_head srb_waiting_list; /* head of waiting srb list */ | |
258 | ||
259 | struct ScsiReqBlk *active_srb; | |
260 | u32 tag_mask; | |
261 | ||
262 | u16 max_command; | |
263 | ||
264 | u8 target_id; /* SCSI Target ID (SCSI Only) */ | |
265 | u8 target_lun; /* SCSI Log. Unit (SCSI Only) */ | |
266 | u8 identify_msg; | |
267 | u8 dev_mode; | |
268 | ||
269 | u8 inquiry7; /* To store Inquiry flags */ | |
270 | u8 sync_mode; /* 0:async mode */ | |
271 | u8 min_nego_period; /* for nego. */ | |
272 | u8 sync_period; /* for reg. */ | |
273 | ||
274 | u8 sync_offset; /* for reg. and nego.(low nibble) */ | |
275 | u8 flag; | |
276 | u8 dev_type; | |
277 | u8 init_tcq_flag; | |
278 | }; | |
279 | ||
280 | struct AdapterCtlBlk { | |
281 | struct Scsi_Host *scsi_host; | |
282 | ||
283 | unsigned long io_port_base; | |
284 | unsigned long io_port_len; | |
285 | ||
286 | struct list_head dcb_list; /* head of going dcb list */ | |
287 | struct DeviceCtlBlk *dcb_run_robin; | |
288 | struct DeviceCtlBlk *active_dcb; | |
289 | ||
290 | struct list_head srb_free_list; /* head of free srb list */ | |
291 | struct ScsiReqBlk *tmp_srb; | |
292 | struct timer_list waiting_timer; | |
293 | struct timer_list selto_timer; | |
294 | ||
53a8936c HR |
295 | unsigned long last_reset; |
296 | ||
1da177e4 LT |
297 | u16 srb_count; |
298 | ||
299 | u8 sel_timeout; | |
300 | ||
301 | unsigned int irq_level; | |
302 | u8 tag_max_num; | |
303 | u8 acb_flag; | |
304 | u8 gmode2; | |
305 | ||
306 | u8 config; | |
307 | u8 lun_chk; | |
308 | u8 scan_devices; | |
309 | u8 hostid_bit; | |
310 | ||
311 | u8 dcb_map[DC395x_MAX_SCSI_ID]; | |
312 | struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32]; | |
313 | ||
314 | struct pci_dev *dev; | |
315 | ||
316 | u8 msg_len; | |
317 | ||
318 | struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT]; | |
319 | struct ScsiReqBlk srb; | |
320 | ||
321 | struct NvRamType eeprom; /* eeprom settings for this adapter */ | |
322 | }; | |
323 | ||
324 | ||
325 | /*--------------------------------------------------------------------------- | |
326 | Forward declarations | |
327 | ---------------------------------------------------------------------------*/ | |
328 | static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
329 | u16 *pscsi_status); | |
330 | static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
331 | u16 *pscsi_status); | |
332 | static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
333 | u16 *pscsi_status); | |
334 | static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
335 | u16 *pscsi_status); | |
336 | static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
337 | u16 *pscsi_status); | |
338 | static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
339 | u16 *pscsi_status); | |
340 | static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
341 | u16 *pscsi_status); | |
342 | static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
343 | u16 *pscsi_status); | |
344 | static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
345 | u16 *pscsi_status); | |
346 | static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
347 | u16 *pscsi_status); | |
348 | static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
349 | u16 *pscsi_status); | |
350 | static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
351 | u16 *pscsi_status); | |
352 | static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
353 | u16 *pscsi_status); | |
354 | static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
355 | u16 *pscsi_status); | |
356 | static void set_basic_config(struct AdapterCtlBlk *acb); | |
357 | static void cleanup_after_transfer(struct AdapterCtlBlk *acb, | |
358 | struct ScsiReqBlk *srb); | |
359 | static void reset_scsi_bus(struct AdapterCtlBlk *acb); | |
360 | static void data_io_transfer(struct AdapterCtlBlk *acb, | |
361 | struct ScsiReqBlk *srb, u16 io_dir); | |
362 | static void disconnect(struct AdapterCtlBlk *acb); | |
363 | static void reselect(struct AdapterCtlBlk *acb); | |
364 | static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, | |
365 | struct ScsiReqBlk *srb); | |
366 | static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, | |
367 | struct ScsiReqBlk *srb); | |
368 | static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, | |
369 | struct ScsiReqBlk *srb); | |
370 | static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code, | |
371 | struct scsi_cmnd *cmd, u8 force); | |
372 | static void scsi_reset_detect(struct AdapterCtlBlk *acb); | |
373 | static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb); | |
374 | static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, | |
375 | struct ScsiReqBlk *srb); | |
376 | static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, | |
377 | struct ScsiReqBlk *srb); | |
378 | static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, | |
379 | struct ScsiReqBlk *srb); | |
380 | static void set_xfer_rate(struct AdapterCtlBlk *acb, | |
381 | struct DeviceCtlBlk *dcb); | |
af53b89b | 382 | static void waiting_timeout(struct timer_list *t); |
1da177e4 LT |
383 | |
384 | ||
385 | /*--------------------------------------------------------------------------- | |
386 | Static Data | |
387 | ---------------------------------------------------------------------------*/ | |
388 | static u16 current_sync_offset = 0; | |
389 | ||
390 | static void *dc395x_scsi_phase0[] = { | |
391 | data_out_phase0,/* phase:0 */ | |
392 | data_in_phase0, /* phase:1 */ | |
393 | command_phase0, /* phase:2 */ | |
394 | status_phase0, /* phase:3 */ | |
395 | nop0, /* phase:4 PH_BUS_FREE .. initial phase */ | |
396 | nop0, /* phase:5 PH_BUS_FREE .. initial phase */ | |
397 | msgout_phase0, /* phase:6 */ | |
398 | msgin_phase0, /* phase:7 */ | |
399 | }; | |
400 | ||
401 | static void *dc395x_scsi_phase1[] = { | |
402 | data_out_phase1,/* phase:0 */ | |
403 | data_in_phase1, /* phase:1 */ | |
404 | command_phase1, /* phase:2 */ | |
405 | status_phase1, /* phase:3 */ | |
406 | nop1, /* phase:4 PH_BUS_FREE .. initial phase */ | |
407 | nop1, /* phase:5 PH_BUS_FREE .. initial phase */ | |
408 | msgout_phase1, /* phase:6 */ | |
409 | msgin_phase1, /* phase:7 */ | |
410 | }; | |
411 | ||
412 | /* | |
413 | *Fast20: 000 50ns, 20.0 MHz | |
414 | * 001 75ns, 13.3 MHz | |
415 | * 010 100ns, 10.0 MHz | |
416 | * 011 125ns, 8.0 MHz | |
417 | * 100 150ns, 6.6 MHz | |
418 | * 101 175ns, 5.7 MHz | |
419 | * 110 200ns, 5.0 MHz | |
420 | * 111 250ns, 4.0 MHz | |
421 | * | |
422 | *Fast40(LVDS): 000 25ns, 40.0 MHz | |
423 | * 001 50ns, 20.0 MHz | |
424 | * 010 75ns, 13.3 MHz | |
425 | * 011 100ns, 10.0 MHz | |
426 | * 100 125ns, 8.0 MHz | |
427 | * 101 150ns, 6.6 MHz | |
428 | * 110 175ns, 5.7 MHz | |
429 | * 111 200ns, 5.0 MHz | |
430 | */ | |
431 | /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/ | |
432 | ||
433 | /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */ | |
434 | static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 }; | |
435 | static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 }; | |
436 | ||
437 | ||
438 | /*--------------------------------------------------------------------------- | |
439 | Configuration | |
440 | ---------------------------------------------------------------------------*/ | |
441 | /* | |
442 | * Module/boot parameters currently effect *all* instances of the | |
443 | * card in the system. | |
444 | */ | |
445 | ||
446 | /* | |
447 | * Command line parameters are stored in a structure below. | |
448 | * These are the index's into the structure for the various | |
449 | * command line options. | |
450 | */ | |
451 | #define CFG_ADAPTER_ID 0 | |
452 | #define CFG_MAX_SPEED 1 | |
453 | #define CFG_DEV_MODE 2 | |
454 | #define CFG_ADAPTER_MODE 3 | |
455 | #define CFG_TAGS 4 | |
456 | #define CFG_RESET_DELAY 5 | |
457 | ||
458 | #define CFG_NUM 6 /* number of configuration items */ | |
459 | ||
460 | ||
461 | /* | |
462 | * Value used to indicate that a command line override | |
463 | * hasn't been used to modify the value. | |
464 | */ | |
465 | #define CFG_PARAM_UNSET -1 | |
466 | ||
467 | ||
468 | /* | |
469 | * Hold command line parameters. | |
470 | */ | |
471 | struct ParameterData { | |
472 | int value; /* value of this setting */ | |
473 | int min; /* minimum value */ | |
474 | int max; /* maximum value */ | |
475 | int def; /* default value */ | |
476 | int safe; /* safe value */ | |
477 | }; | |
6f039790 | 478 | static struct ParameterData cfg_data[] = { |
1da177e4 LT |
479 | { /* adapter id */ |
480 | CFG_PARAM_UNSET, | |
481 | 0, | |
482 | 15, | |
483 | 7, | |
484 | 7 | |
485 | }, | |
486 | { /* max speed */ | |
487 | CFG_PARAM_UNSET, | |
488 | 0, | |
489 | 7, | |
490 | 1, /* 13.3Mhz */ | |
491 | 4, /* 6.7Hmz */ | |
492 | }, | |
493 | { /* dev mode */ | |
494 | CFG_PARAM_UNSET, | |
495 | 0, | |
496 | 0x3f, | |
497 | NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO | | |
498 | NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING | | |
499 | NTC_DO_SEND_START, | |
500 | NTC_DO_PARITY_CHK | NTC_DO_SEND_START | |
501 | }, | |
502 | { /* adapter mode */ | |
503 | CFG_PARAM_UNSET, | |
504 | 0, | |
505 | 0x2f, | |
c309b351 | 506 | NAC_SCANLUN | |
1da177e4 LT |
507 | NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET |
508 | /*| NAC_ACTIVE_NEG*/, | |
509 | NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08 | |
510 | }, | |
511 | { /* tags */ | |
512 | CFG_PARAM_UNSET, | |
513 | 0, | |
514 | 5, | |
515 | 3, /* 16 tags (??) */ | |
516 | 2, | |
517 | }, | |
518 | { /* reset delay */ | |
519 | CFG_PARAM_UNSET, | |
520 | 0, | |
521 | 180, | |
522 | 1, /* 1 second */ | |
523 | 10, /* 10 seconds */ | |
524 | } | |
525 | }; | |
526 | ||
527 | ||
528 | /* | |
59c51591 | 529 | * Safe settings. If set to zero the BIOS/default values with |
1da177e4 LT |
530 | * command line overrides will be used. If set to 1 then safe and |
531 | * slow settings will be used. | |
532 | */ | |
90ab5ee9 | 533 | static bool use_safe_settings = 0; |
1da177e4 LT |
534 | module_param_named(safe, use_safe_settings, bool, 0); |
535 | MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false"); | |
536 | ||
537 | ||
538 | module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0); | |
539 | MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)"); | |
540 | ||
541 | module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0); | |
542 | MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz"); | |
543 | ||
544 | module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0); | |
545 | MODULE_PARM_DESC(dev_mode, "Device mode."); | |
546 | ||
547 | module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0); | |
548 | MODULE_PARM_DESC(adapter_mode, "Adapter mode."); | |
549 | ||
550 | module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0); | |
551 | MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)"); | |
552 | ||
553 | module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0); | |
554 | MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)"); | |
555 | ||
556 | ||
557 | /** | |
558 | * set_safe_settings - if the use_safe_settings option is set then | |
559 | * set all values to the safe and slow values. | |
560 | **/ | |
6f039790 | 561 | static void set_safe_settings(void) |
1da177e4 LT |
562 | { |
563 | if (use_safe_settings) | |
564 | { | |
565 | int i; | |
566 | ||
567 | dprintkl(KERN_INFO, "Using safe settings.\n"); | |
568 | for (i = 0; i < CFG_NUM; i++) | |
569 | { | |
570 | cfg_data[i].value = cfg_data[i].safe; | |
571 | } | |
572 | } | |
573 | } | |
574 | ||
575 | ||
576 | /** | |
577 | * fix_settings - reset any boot parameters which are out of range | |
578 | * back to the default values. | |
579 | **/ | |
6f039790 | 580 | static void fix_settings(void) |
1da177e4 LT |
581 | { |
582 | int i; | |
583 | ||
584 | dprintkdbg(DBG_1, | |
585 | "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x " | |
586 | "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n", | |
587 | cfg_data[CFG_ADAPTER_ID].value, | |
588 | cfg_data[CFG_MAX_SPEED].value, | |
589 | cfg_data[CFG_DEV_MODE].value, | |
590 | cfg_data[CFG_ADAPTER_MODE].value, | |
591 | cfg_data[CFG_TAGS].value, | |
592 | cfg_data[CFG_RESET_DELAY].value); | |
593 | for (i = 0; i < CFG_NUM; i++) | |
594 | { | |
595 | if (cfg_data[i].value < cfg_data[i].min | |
596 | || cfg_data[i].value > cfg_data[i].max) | |
597 | cfg_data[i].value = cfg_data[i].def; | |
598 | } | |
599 | } | |
600 | ||
601 | ||
602 | ||
603 | /* | |
604 | * Mapping from the eeprom delay index value (index into this array) | |
59c51591 | 605 | * to the number of actual seconds that the delay should be for. |
1da177e4 | 606 | */ |
6f039790 | 607 | static char eeprom_index_to_delay_map[] = |
1da177e4 LT |
608 | { 1, 3, 5, 10, 16, 30, 60, 120 }; |
609 | ||
610 | ||
611 | /** | |
612 | * eeprom_index_to_delay - Take the eeprom delay setting and convert it | |
613 | * into a number of seconds. | |
614 | * | |
615 | * @eeprom: The eeprom structure in which we find the delay index to map. | |
616 | **/ | |
6f039790 | 617 | static void eeprom_index_to_delay(struct NvRamType *eeprom) |
1da177e4 LT |
618 | { |
619 | eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time]; | |
620 | } | |
621 | ||
622 | ||
623 | /** | |
624 | * delay_to_eeprom_index - Take a delay in seconds and return the | |
625 | * closest eeprom index which will delay for at least that amount of | |
626 | * seconds. | |
627 | * | |
628 | * @delay: The delay, in seconds, to find the eeprom index for. | |
629 | **/ | |
6f039790 | 630 | static int delay_to_eeprom_index(int delay) |
1da177e4 LT |
631 | { |
632 | u8 idx = 0; | |
633 | while (idx < 7 && eeprom_index_to_delay_map[idx] < delay) | |
634 | idx++; | |
635 | return idx; | |
636 | } | |
637 | ||
638 | ||
639 | /** | |
640 | * eeprom_override - Override the eeprom settings, in the provided | |
641 | * eeprom structure, with values that have been set on the command | |
642 | * line. | |
643 | * | |
644 | * @eeprom: The eeprom data to override with command line options. | |
645 | **/ | |
6f039790 | 646 | static void eeprom_override(struct NvRamType *eeprom) |
1da177e4 LT |
647 | { |
648 | u8 id; | |
649 | ||
650 | /* Adapter Settings */ | |
651 | if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET) | |
652 | eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value; | |
653 | ||
654 | if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET) | |
655 | eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value; | |
656 | ||
657 | if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET) | |
658 | eeprom->delay_time = delay_to_eeprom_index( | |
659 | cfg_data[CFG_RESET_DELAY].value); | |
660 | ||
661 | if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET) | |
662 | eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value; | |
663 | ||
664 | /* Device Settings */ | |
665 | for (id = 0; id < DC395x_MAX_SCSI_ID; id++) { | |
666 | if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET) | |
667 | eeprom->target[id].cfg0 = | |
668 | (u8)cfg_data[CFG_DEV_MODE].value; | |
669 | ||
670 | if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET) | |
671 | eeprom->target[id].period = | |
672 | (u8)cfg_data[CFG_MAX_SPEED].value; | |
673 | ||
674 | } | |
675 | } | |
676 | ||
677 | ||
678 | /*--------------------------------------------------------------------------- | |
679 | ---------------------------------------------------------------------------*/ | |
680 | ||
681 | static unsigned int list_size(struct list_head *head) | |
682 | { | |
683 | unsigned int count = 0; | |
684 | struct list_head *pos; | |
685 | list_for_each(pos, head) | |
686 | count++; | |
687 | return count; | |
688 | } | |
689 | ||
690 | ||
691 | static struct DeviceCtlBlk *dcb_get_next(struct list_head *head, | |
692 | struct DeviceCtlBlk *pos) | |
693 | { | |
694 | int use_next = 0; | |
695 | struct DeviceCtlBlk* next = NULL; | |
696 | struct DeviceCtlBlk* i; | |
697 | ||
698 | if (list_empty(head)) | |
699 | return NULL; | |
700 | ||
701 | /* find supplied dcb and then select the next one */ | |
702 | list_for_each_entry(i, head, list) | |
703 | if (use_next) { | |
704 | next = i; | |
705 | break; | |
706 | } else if (i == pos) { | |
707 | use_next = 1; | |
708 | } | |
709 | /* if no next one take the head one (ie, wraparound) */ | |
710 | if (!next) | |
711 | list_for_each_entry(i, head, list) { | |
712 | next = i; | |
713 | break; | |
714 | } | |
715 | ||
716 | return next; | |
717 | } | |
718 | ||
719 | ||
720 | static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) | |
721 | { | |
722 | if (srb->tag_number < 255) { | |
723 | dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */ | |
724 | srb->tag_number = 255; | |
725 | } | |
726 | } | |
727 | ||
728 | ||
729 | /* Find cmd in SRB list */ | |
77933d72 | 730 | static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd, |
1da177e4 LT |
731 | struct list_head *head) |
732 | { | |
733 | struct ScsiReqBlk *i; | |
734 | list_for_each_entry(i, head, list) | |
735 | if (i->cmd == cmd) | |
736 | return i; | |
737 | return NULL; | |
738 | } | |
739 | ||
1da177e4 LT |
740 | /* Sets the timer to wake us up */ |
741 | static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to) | |
742 | { | |
743 | if (timer_pending(&acb->waiting_timer)) | |
744 | return; | |
53a8936c | 745 | if (time_before(jiffies + to, acb->last_reset - HZ / 2)) |
1da177e4 | 746 | acb->waiting_timer.expires = |
53a8936c | 747 | acb->last_reset - HZ / 2 + 1; |
1da177e4 LT |
748 | else |
749 | acb->waiting_timer.expires = jiffies + to + 1; | |
750 | add_timer(&acb->waiting_timer); | |
751 | } | |
752 | ||
753 | ||
754 | /* Send the next command from the waiting list to the bus */ | |
755 | static void waiting_process_next(struct AdapterCtlBlk *acb) | |
756 | { | |
757 | struct DeviceCtlBlk *start = NULL; | |
758 | struct DeviceCtlBlk *pos; | |
759 | struct DeviceCtlBlk *dcb; | |
760 | struct ScsiReqBlk *srb; | |
761 | struct list_head *dcb_list_head = &acb->dcb_list; | |
762 | ||
763 | if (acb->active_dcb | |
764 | || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) | |
765 | return; | |
766 | ||
767 | if (timer_pending(&acb->waiting_timer)) | |
768 | del_timer(&acb->waiting_timer); | |
769 | ||
770 | if (list_empty(dcb_list_head)) | |
771 | return; | |
772 | ||
773 | /* | |
774 | * Find the starting dcb. Need to find it again in the list | |
775 | * since the list may have changed since we set the ptr to it | |
776 | */ | |
777 | list_for_each_entry(dcb, dcb_list_head, list) | |
778 | if (dcb == acb->dcb_run_robin) { | |
779 | start = dcb; | |
780 | break; | |
781 | } | |
782 | if (!start) { | |
783 | /* This can happen! */ | |
784 | start = list_entry(dcb_list_head->next, typeof(*start), list); | |
785 | acb->dcb_run_robin = start; | |
786 | } | |
787 | ||
788 | ||
789 | /* | |
790 | * Loop over the dcb, but we start somewhere (potentially) in | |
791 | * the middle of the loop so we need to manully do this. | |
792 | */ | |
793 | pos = start; | |
794 | do { | |
795 | struct list_head *waiting_list_head = &pos->srb_waiting_list; | |
796 | ||
797 | /* Make sure, the next another device gets scheduled ... */ | |
798 | acb->dcb_run_robin = dcb_get_next(dcb_list_head, | |
799 | acb->dcb_run_robin); | |
800 | ||
801 | if (list_empty(waiting_list_head) || | |
802 | pos->max_command <= list_size(&pos->srb_going_list)) { | |
803 | /* move to next dcb */ | |
804 | pos = dcb_get_next(dcb_list_head, pos); | |
805 | } else { | |
806 | srb = list_entry(waiting_list_head->next, | |
807 | struct ScsiReqBlk, list); | |
808 | ||
809 | /* Try to send to the bus */ | |
810 | if (!start_scsi(acb, pos, srb)) | |
cd29660d | 811 | list_move(&srb->list, &pos->srb_going_list); |
1da177e4 LT |
812 | else |
813 | waiting_set_timer(acb, HZ/50); | |
814 | break; | |
815 | } | |
816 | } while (pos != start); | |
817 | } | |
818 | ||
819 | ||
820 | /* Wake up waiting queue */ | |
af53b89b | 821 | static void waiting_timeout(struct timer_list *t) |
1da177e4 LT |
822 | { |
823 | unsigned long flags; | |
af53b89b | 824 | struct AdapterCtlBlk *acb = from_timer(acb, t, waiting_timer); |
1da177e4 LT |
825 | dprintkdbg(DBG_1, |
826 | "waiting_timeout: Queue woken up by timer. acb=%p\n", acb); | |
827 | DC395x_LOCK_IO(acb->scsi_host, flags); | |
828 | waiting_process_next(acb); | |
829 | DC395x_UNLOCK_IO(acb->scsi_host, flags); | |
830 | } | |
831 | ||
832 | ||
833 | /* Get the DCB for a given ID/LUN combination */ | |
834 | static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun) | |
835 | { | |
836 | return acb->children[id][lun]; | |
837 | } | |
838 | ||
839 | ||
840 | /* Send SCSI Request Block (srb) to adapter (acb) */ | |
841 | static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) | |
842 | { | |
843 | struct DeviceCtlBlk *dcb = srb->dcb; | |
844 | ||
845 | if (dcb->max_command <= list_size(&dcb->srb_going_list) || | |
846 | acb->active_dcb || | |
847 | (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) { | |
cd29660d | 848 | list_add_tail(&srb->list, &dcb->srb_waiting_list); |
1da177e4 LT |
849 | waiting_process_next(acb); |
850 | return; | |
851 | } | |
852 | ||
cd29660d CH |
853 | if (!start_scsi(acb, dcb, srb)) { |
854 | list_add_tail(&srb->list, &dcb->srb_going_list); | |
855 | } else { | |
856 | list_add(&srb->list, &dcb->srb_waiting_list); | |
1da177e4 LT |
857 | waiting_set_timer(acb, HZ / 50); |
858 | } | |
859 | } | |
860 | ||
1da177e4 LT |
861 | /* Prepare SRB for being sent to Device DCB w/ command *cmd */ |
862 | static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, | |
863 | struct ScsiReqBlk *srb) | |
864 | { | |
a862ea31 | 865 | int nseg; |
1da177e4 | 866 | enum dma_data_direction dir = cmd->sc_data_direction; |
5cd049a5 CH |
867 | dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n", |
868 | cmd, dcb->target_id, dcb->target_lun); | |
1da177e4 LT |
869 | |
870 | srb->dcb = dcb; | |
871 | srb->cmd = cmd; | |
872 | srb->sg_count = 0; | |
873 | srb->total_xfer_length = 0; | |
874 | srb->sg_bus_addr = 0; | |
1da177e4 LT |
875 | srb->sg_index = 0; |
876 | srb->adapter_status = 0; | |
877 | srb->target_status = 0; | |
878 | srb->msg_count = 0; | |
879 | srb->status = 0; | |
880 | srb->flag = 0; | |
881 | srb->state = 0; | |
882 | srb->retry_count = 0; | |
883 | srb->tag_number = TAG_NONE; | |
884 | srb->scsi_phase = PH_BUS_FREE; /* initial phase */ | |
885 | srb->end_message = 0; | |
886 | ||
a862ea31 FT |
887 | nseg = scsi_dma_map(cmd); |
888 | BUG_ON(nseg < 0); | |
889 | ||
ece0eeff | 890 | if (dir == DMA_NONE || !nseg) { |
1da177e4 LT |
891 | dprintkdbg(DBG_0, |
892 | "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n", | |
a862ea31 FT |
893 | cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd), |
894 | srb->segment_x[0].address); | |
895 | } else { | |
1da177e4 | 896 | int i; |
a862ea31 FT |
897 | u32 reqlen = scsi_bufflen(cmd); |
898 | struct scatterlist *sg; | |
1da177e4 | 899 | struct SGentry *sgp = srb->segment_x; |
a862ea31 FT |
900 | |
901 | srb->sg_count = nseg; | |
902 | ||
1da177e4 | 903 | dprintkdbg(DBG_0, |
a862ea31 FT |
904 | "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n", |
905 | reqlen, scsi_sglist(cmd), scsi_sg_count(cmd), | |
906 | srb->sg_count); | |
1da177e4 | 907 | |
a862ea31 FT |
908 | scsi_for_each_sg(cmd, sg, srb->sg_count, i) { |
909 | u32 busaddr = (u32)sg_dma_address(sg); | |
910 | u32 seglen = (u32)sg->length; | |
b4b08e58 | 911 | sgp[i].address = busaddr; |
1da177e4 LT |
912 | sgp[i].length = seglen; |
913 | srb->total_xfer_length += seglen; | |
1da177e4 | 914 | } |
1da177e4 LT |
915 | sgp += srb->sg_count - 1; |
916 | ||
917 | /* | |
918 | * adjust last page if too big as it is allocated | |
919 | * on even page boundaries | |
920 | */ | |
921 | if (srb->total_xfer_length > reqlen) { | |
922 | sgp->length -= (srb->total_xfer_length - reqlen); | |
923 | srb->total_xfer_length = reqlen; | |
924 | } | |
925 | ||
926 | /* Fixup for WIDE padding - make sure length is even */ | |
927 | if (dcb->sync_period & WIDE_SYNC && | |
928 | srb->total_xfer_length % 2) { | |
929 | srb->total_xfer_length++; | |
930 | sgp->length++; | |
931 | } | |
932 | ||
dfda5e21 CH |
933 | srb->sg_bus_addr = dma_map_single(&dcb->acb->dev->dev, |
934 | srb->segment_x, SEGMENTX_LEN, DMA_TO_DEVICE); | |
1da177e4 LT |
935 | |
936 | dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n", | |
937 | srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN); | |
1da177e4 | 938 | } |
cdb8c2a6 GL |
939 | |
940 | srb->request_length = srb->total_xfer_length; | |
1da177e4 LT |
941 | } |
942 | ||
943 | ||
944 | /** | |
167b7e6b | 945 | * dc395x_queue_command_lck - queue scsi command passed from the mid |
1da177e4 LT |
946 | * layer, invoke 'done' on completion |
947 | * | |
948 | * @cmd: pointer to scsi command object | |
1da177e4 LT |
949 | * |
950 | * Returns 1 if the adapter (host) is busy, else returns 0. One | |
951 | * reason for an adapter to be busy is that the number | |
952 | * of outstanding queued commands is already equal to | |
953 | * struct Scsi_Host::can_queue . | |
954 | * | |
955 | * Required: if struct Scsi_Host::can_queue is ever non-zero | |
956 | * then this function is required. | |
957 | * | |
958 | * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave") | |
959 | * and is expected to be held on return. | |
960 | * | |
013d14ea | 961 | */ |
af049dfd | 962 | static int dc395x_queue_command_lck(struct scsi_cmnd *cmd) |
1da177e4 | 963 | { |
af049dfd | 964 | void (*done)(struct scsi_cmnd *) = scsi_done; |
1da177e4 LT |
965 | struct DeviceCtlBlk *dcb; |
966 | struct ScsiReqBlk *srb; | |
967 | struct AdapterCtlBlk *acb = | |
968 | (struct AdapterCtlBlk *)cmd->device->host->hostdata; | |
5cd049a5 | 969 | dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n", |
9cb78c16 | 970 | cmd, cmd->device->id, (u8)cmd->device->lun, cmd->cmnd[0]); |
1da177e4 LT |
971 | |
972 | /* Assume BAD_TARGET; will be cleared later */ | |
75dd4439 | 973 | set_host_byte(cmd, DID_BAD_TARGET); |
1da177e4 LT |
974 | |
975 | /* ignore invalid targets */ | |
976 | if (cmd->device->id >= acb->scsi_host->max_id || | |
977 | cmd->device->lun >= acb->scsi_host->max_lun || | |
978 | cmd->device->lun >31) { | |
979 | goto complete; | |
980 | } | |
981 | ||
982 | /* does the specified lun on the specified device exist */ | |
983 | if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) { | |
984 | dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n", | |
9cb78c16 | 985 | cmd->device->id, (u8)cmd->device->lun); |
1da177e4 LT |
986 | goto complete; |
987 | } | |
988 | ||
989 | /* do we have a DCB for the device */ | |
990 | dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); | |
991 | if (!dcb) { | |
992 | /* should never happen */ | |
993 | dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>", | |
9cb78c16 | 994 | cmd->device->id, (u8)cmd->device->lun); |
1da177e4 LT |
995 | goto complete; |
996 | } | |
997 | ||
75dd4439 HR |
998 | set_host_byte(cmd, DID_OK); |
999 | set_status_byte(cmd, SAM_STAT_GOOD); | |
1da177e4 | 1000 | |
cd29660d CH |
1001 | srb = list_first_entry_or_null(&acb->srb_free_list, |
1002 | struct ScsiReqBlk, list); | |
1003 | if (!srb) { | |
1da177e4 LT |
1004 | /* |
1005 | * Return 1 since we are unable to queue this command at this | |
1006 | * point in time. | |
1007 | */ | |
1008 | dprintkdbg(DBG_0, "queue_command: No free srb's\n"); | |
1009 | return 1; | |
1010 | } | |
cd29660d | 1011 | list_del(&srb->list); |
1da177e4 LT |
1012 | |
1013 | build_srb(cmd, dcb, srb); | |
1014 | ||
1015 | if (!list_empty(&dcb->srb_waiting_list)) { | |
1016 | /* append to waiting queue */ | |
cd29660d | 1017 | list_add_tail(&srb->list, &dcb->srb_waiting_list); |
1da177e4 LT |
1018 | waiting_process_next(acb); |
1019 | } else { | |
1020 | /* process immediately */ | |
1021 | send_srb(acb, srb); | |
1022 | } | |
5cd049a5 | 1023 | dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd); |
1da177e4 LT |
1024 | return 0; |
1025 | ||
1026 | complete: | |
1027 | /* | |
1028 | * Complete the command immediatey, and then return 0 to | |
1029 | * indicate that we have handled the command. This is usually | |
1030 | * done when the commad is for things like non existent | |
1031 | * devices. | |
1032 | */ | |
1033 | done(cmd); | |
1034 | return 0; | |
1035 | } | |
1036 | ||
f281233d | 1037 | static DEF_SCSI_QCMD(dc395x_queue_command) |
1da177e4 | 1038 | |
1da177e4 LT |
1039 | static void dump_register_info(struct AdapterCtlBlk *acb, |
1040 | struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) | |
1041 | { | |
1042 | u16 pstat; | |
1043 | struct pci_dev *dev = acb->dev; | |
1044 | pci_read_config_word(dev, PCI_STATUS, &pstat); | |
1045 | if (!dcb) | |
1046 | dcb = acb->active_dcb; | |
1047 | if (!srb && dcb) | |
1048 | srb = dcb->active_srb; | |
1049 | if (srb) { | |
1050 | if (!srb->cmd) | |
1051 | dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n", | |
1052 | srb, srb->cmd); | |
1053 | else | |
5cd049a5 | 1054 | dprintkl(KERN_INFO, "dump: srb=%p cmd=%p " |
1da177e4 | 1055 | "cmnd=0x%02x <%02i-%i>\n", |
5cd049a5 | 1056 | srb, srb->cmd, |
1da177e4 | 1057 | srb->cmd->cmnd[0], srb->cmd->device->id, |
9cb78c16 | 1058 | (u8)srb->cmd->device->lun); |
3c5c6658 | 1059 | printk(" sglist=%p cnt=%i idx=%i len=%zu\n", |
1da177e4 LT |
1060 | srb->segment_x, srb->sg_count, srb->sg_index, |
1061 | srb->total_xfer_length); | |
1062 | printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n", | |
1063 | srb->state, srb->status, srb->scsi_phase, | |
1064 | (acb->active_dcb) ? "" : "not"); | |
1065 | } | |
1066 | dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x " | |
1067 | "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x " | |
1068 | "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x " | |
1069 | "config2=0x%02x cmd=0x%02x selto=0x%02x}\n", | |
1070 | DC395x_read16(acb, TRM_S1040_SCSI_STATUS), | |
1071 | DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), | |
1072 | DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL), | |
1073 | DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS), | |
1074 | DC395x_read8(acb, TRM_S1040_SCSI_SYNC), | |
1075 | DC395x_read8(acb, TRM_S1040_SCSI_TARGETID), | |
1076 | DC395x_read8(acb, TRM_S1040_SCSI_IDMSG), | |
1077 | DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), | |
1078 | DC395x_read8(acb, TRM_S1040_SCSI_INTEN), | |
1079 | DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0), | |
1080 | DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2), | |
1081 | DC395x_read8(acb, TRM_S1040_SCSI_COMMAND), | |
1082 | DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT)); | |
1083 | dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x " | |
1084 | "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x " | |
1085 | "ctctr=0x%08x addr=0x%08x:0x%08x}\n", | |
1086 | DC395x_read16(acb, TRM_S1040_DMA_COMMAND), | |
1087 | DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), | |
1088 | DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), | |
1089 | DC395x_read8(acb, TRM_S1040_DMA_STATUS), | |
1090 | DC395x_read8(acb, TRM_S1040_DMA_INTEN), | |
1091 | DC395x_read16(acb, TRM_S1040_DMA_CONFIG), | |
1092 | DC395x_read32(acb, TRM_S1040_DMA_XCNT), | |
1093 | DC395x_read32(acb, TRM_S1040_DMA_CXCNT), | |
1094 | DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR), | |
1095 | DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR)); | |
1096 | dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} " | |
1097 | "pci{status=0x%04x}\n", | |
1098 | DC395x_read8(acb, TRM_S1040_GEN_CONTROL), | |
1099 | DC395x_read8(acb, TRM_S1040_GEN_STATUS), | |
1100 | DC395x_read8(acb, TRM_S1040_GEN_TIMER), | |
1101 | pstat); | |
1102 | } | |
1103 | ||
1104 | ||
1105 | static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt) | |
1106 | { | |
1107 | #if debug_enabled(DBG_FIFO) | |
1108 | u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); | |
1109 | u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); | |
1110 | if (!(fifocnt & 0x40)) | |
1111 | dprintkdbg(DBG_FIFO, | |
1112 | "clear_fifo: (%i bytes) on phase %02x in %s\n", | |
1113 | fifocnt & 0x3f, lines, txt); | |
1114 | #endif | |
1115 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO); | |
1116 | } | |
1117 | ||
1118 | ||
1119 | static void reset_dev_param(struct AdapterCtlBlk *acb) | |
1120 | { | |
1121 | struct DeviceCtlBlk *dcb; | |
1122 | struct NvRamType *eeprom = &acb->eeprom; | |
1123 | dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb); | |
1124 | ||
1125 | list_for_each_entry(dcb, &acb->dcb_list, list) { | |
1126 | u8 period_index; | |
1127 | ||
1128 | dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE); | |
1129 | dcb->sync_period = 0; | |
1130 | dcb->sync_offset = 0; | |
1131 | ||
1132 | dcb->dev_mode = eeprom->target[dcb->target_id].cfg0; | |
1133 | period_index = eeprom->target[dcb->target_id].period & 0x07; | |
1134 | dcb->min_nego_period = clock_period[period_index]; | |
1135 | if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO) | |
1136 | || !(acb->config & HCC_WIDE_CARD)) | |
1137 | dcb->sync_mode &= ~WIDE_NEGO_ENABLE; | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | ||
1142 | /* | |
1143 | * perform a hard reset on the SCSI bus | |
1144 | * @cmd - some command for this host (for fetching hooks) | |
1145 | * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). | |
1146 | */ | |
68b3aa7c | 1147 | static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd) |
1da177e4 LT |
1148 | { |
1149 | struct AdapterCtlBlk *acb = | |
1150 | (struct AdapterCtlBlk *)cmd->device->host->hostdata; | |
1151 | dprintkl(KERN_INFO, | |
5cd049a5 | 1152 | "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n", |
9cb78c16 | 1153 | cmd, cmd->device->id, (u8)cmd->device->lun, cmd); |
1da177e4 LT |
1154 | |
1155 | if (timer_pending(&acb->waiting_timer)) | |
1156 | del_timer(&acb->waiting_timer); | |
1157 | ||
1158 | /* | |
1159 | * disable interrupt | |
1160 | */ | |
1161 | DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); | |
1162 | DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); | |
1163 | DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); | |
1164 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); | |
1165 | ||
1166 | reset_scsi_bus(acb); | |
1167 | udelay(500); | |
1168 | ||
1169 | /* We may be in serious trouble. Wait some seconds */ | |
53a8936c | 1170 | acb->last_reset = |
1da177e4 LT |
1171 | jiffies + 3 * HZ / 2 + |
1172 | HZ * acb->eeprom.delay_time; | |
1173 | ||
1174 | /* | |
1175 | * re-enable interrupt | |
1176 | */ | |
1177 | /* Clear SCSI FIFO */ | |
1178 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); | |
1179 | clear_fifo(acb, "eh_bus_reset"); | |
1180 | /* Delete pending IRQ */ | |
1181 | DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); | |
1182 | set_basic_config(acb); | |
1183 | ||
1184 | reset_dev_param(acb); | |
1185 | doing_srb_done(acb, DID_RESET, cmd, 0); | |
1186 | acb->active_dcb = NULL; | |
1187 | acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */ | |
1188 | waiting_process_next(acb); | |
1189 | ||
1190 | return SUCCESS; | |
1191 | } | |
1192 | ||
68b3aa7c JG |
1193 | static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd) |
1194 | { | |
1195 | int rc; | |
1196 | ||
1197 | spin_lock_irq(cmd->device->host->host_lock); | |
1198 | rc = __dc395x_eh_bus_reset(cmd); | |
1199 | spin_unlock_irq(cmd->device->host->host_lock); | |
1200 | ||
1201 | return rc; | |
1202 | } | |
1da177e4 LT |
1203 | |
1204 | /* | |
1205 | * abort an errant SCSI command | |
1206 | * @cmd - command to be aborted | |
1207 | * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). | |
1208 | */ | |
1209 | static int dc395x_eh_abort(struct scsi_cmnd *cmd) | |
1210 | { | |
1211 | /* | |
1212 | * Look into our command queues: If it has not been sent already, | |
1213 | * we remove it and return success. Otherwise fail. | |
1214 | */ | |
1215 | struct AdapterCtlBlk *acb = | |
1216 | (struct AdapterCtlBlk *)cmd->device->host->hostdata; | |
1217 | struct DeviceCtlBlk *dcb; | |
1218 | struct ScsiReqBlk *srb; | |
5cd049a5 | 1219 | dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n", |
9cb78c16 | 1220 | cmd, cmd->device->id, (u8)cmd->device->lun, cmd); |
1da177e4 LT |
1221 | |
1222 | dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); | |
1223 | if (!dcb) { | |
1224 | dprintkl(KERN_DEBUG, "eh_abort: No such device\n"); | |
1225 | return FAILED; | |
1226 | } | |
1227 | ||
1228 | srb = find_cmd(cmd, &dcb->srb_waiting_list); | |
1229 | if (srb) { | |
cd29660d | 1230 | list_del(&srb->list); |
1da177e4 LT |
1231 | pci_unmap_srb_sense(acb, srb); |
1232 | pci_unmap_srb(acb, srb); | |
1233 | free_tag(dcb, srb); | |
cd29660d | 1234 | list_add_tail(&srb->list, &acb->srb_free_list); |
1da177e4 | 1235 | dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n"); |
75dd4439 | 1236 | set_host_byte(cmd, DID_ABORT); |
1da177e4 LT |
1237 | return SUCCESS; |
1238 | } | |
1239 | srb = find_cmd(cmd, &dcb->srb_going_list); | |
1240 | if (srb) { | |
cdb8c2a6 | 1241 | dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n"); |
1da177e4 LT |
1242 | /* XXX: Should abort the command here */ |
1243 | } else { | |
cdb8c2a6 | 1244 | dprintkl(KERN_DEBUG, "eh_abort: Command not found\n"); |
1da177e4 LT |
1245 | } |
1246 | return FAILED; | |
1247 | } | |
1248 | ||
1249 | ||
1250 | /* SDTR */ | |
1251 | static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, | |
1252 | struct ScsiReqBlk *srb) | |
1253 | { | |
1254 | u8 *ptr = srb->msgout_buf + srb->msg_count; | |
1255 | if (srb->msg_count > 1) { | |
1256 | dprintkl(KERN_INFO, | |
1257 | "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n", | |
1258 | srb->msg_count, srb->msgout_buf[0], | |
1259 | srb->msgout_buf[1]); | |
1260 | return; | |
1261 | } | |
1262 | if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) { | |
1263 | dcb->sync_offset = 0; | |
1264 | dcb->min_nego_period = 200 >> 2; | |
1265 | } else if (dcb->sync_offset == 0) | |
1266 | dcb->sync_offset = SYNC_NEGO_OFFSET; | |
1267 | ||
9c2d2670 HR |
1268 | srb->msg_count += spi_populate_sync_msg(ptr, dcb->min_nego_period, |
1269 | dcb->sync_offset); | |
1da177e4 LT |
1270 | srb->state |= SRB_DO_SYNC_NEGO; |
1271 | } | |
1272 | ||
1273 | ||
1274 | /* WDTR */ | |
1275 | static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, | |
1276 | struct ScsiReqBlk *srb) | |
1277 | { | |
1278 | u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) & | |
1279 | (acb->config & HCC_WIDE_CARD)) ? 1 : 0; | |
1280 | u8 *ptr = srb->msgout_buf + srb->msg_count; | |
1281 | if (srb->msg_count > 1) { | |
1282 | dprintkl(KERN_INFO, | |
1283 | "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n", | |
1284 | srb->msg_count, srb->msgout_buf[0], | |
1285 | srb->msgout_buf[1]); | |
1286 | return; | |
1287 | } | |
9c2d2670 | 1288 | srb->msg_count += spi_populate_width_msg(ptr, wide); |
1da177e4 LT |
1289 | srb->state |= SRB_DO_WIDE_NEGO; |
1290 | } | |
1291 | ||
1292 | ||
1293 | #if 0 | |
1294 | /* Timer to work around chip flaw: When selecting and the bus is | |
1295 | * busy, we sometimes miss a Selection timeout IRQ */ | |
1296 | void selection_timeout_missed(unsigned long ptr); | |
1297 | /* Sets the timer to wake us up */ | |
1298 | static void selto_timer(struct AdapterCtlBlk *acb) | |
1299 | { | |
1300 | if (timer_pending(&acb->selto_timer)) | |
1301 | return; | |
1302 | acb->selto_timer.function = selection_timeout_missed; | |
1303 | acb->selto_timer.data = (unsigned long) acb; | |
1304 | if (time_before | |
53a8936c | 1305 | (jiffies + HZ, acb->last_reset + HZ / 2)) |
1da177e4 | 1306 | acb->selto_timer.expires = |
53a8936c | 1307 | acb->last_reset + HZ / 2 + 1; |
1da177e4 LT |
1308 | else |
1309 | acb->selto_timer.expires = jiffies + HZ + 1; | |
1310 | add_timer(&acb->selto_timer); | |
1311 | } | |
1312 | ||
1313 | ||
1314 | void selection_timeout_missed(unsigned long ptr) | |
1315 | { | |
1316 | unsigned long flags; | |
1317 | struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; | |
1318 | struct ScsiReqBlk *srb; | |
1319 | dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n"); | |
1320 | if (!acb->active_dcb || !acb->active_dcb->active_srb) { | |
1321 | dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n"); | |
1322 | return; | |
1323 | } | |
1324 | DC395x_LOCK_IO(acb->scsi_host, flags); | |
1325 | srb = acb->active_dcb->active_srb; | |
1326 | disconnect(acb); | |
1327 | DC395x_UNLOCK_IO(acb->scsi_host, flags); | |
1328 | } | |
1329 | #endif | |
1330 | ||
1331 | ||
1332 | static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb, | |
1333 | struct ScsiReqBlk* srb) | |
1334 | { | |
6c22079e | 1335 | u16 __maybe_unused s_stat2, return_code; |
1da177e4 LT |
1336 | u8 s_stat, scsicommand, i, identify_message; |
1337 | u8 *ptr; | |
5cd049a5 CH |
1338 | dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n", |
1339 | dcb->target_id, dcb->target_lun, srb); | |
1da177e4 LT |
1340 | |
1341 | srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */ | |
1342 | ||
1343 | s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); | |
1344 | s_stat2 = 0; | |
1345 | s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); | |
1346 | #if 1 | |
1347 | if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) { | |
5cd049a5 CH |
1348 | dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n", |
1349 | s_stat, s_stat2); | |
1da177e4 LT |
1350 | /* |
1351 | * Try anyway? | |
1352 | * | |
1353 | * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection | |
b71a8eb0 | 1354 | * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed! |
1da177e4 LT |
1355 | * (This is likely to be a bug in the hardware. Obviously, most people |
1356 | * only have one initiator per SCSI bus.) | |
1357 | * Instead let this fail and have the timer make sure the command is | |
1358 | * tried again after a short time | |
1359 | */ | |
1360 | /*selto_timer (acb); */ | |
1361 | return 1; | |
1362 | } | |
1363 | #endif | |
1364 | if (acb->active_dcb) { | |
5cd049a5 CH |
1365 | dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a" |
1366 | "command while another command (0x%p) is active.", | |
1367 | srb->cmd, | |
1da177e4 | 1368 | acb->active_dcb->active_srb ? |
5cd049a5 | 1369 | acb->active_dcb->active_srb->cmd : 0); |
1da177e4 LT |
1370 | return 1; |
1371 | } | |
1372 | if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { | |
5cd049a5 | 1373 | dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd); |
1da177e4 LT |
1374 | return 1; |
1375 | } | |
1376 | /* Allow starting of SCSI commands half a second before we allow the mid-level | |
1377 | * to queue them again after a reset */ | |
53a8936c | 1378 | if (time_before(jiffies, acb->last_reset - HZ / 2)) { |
1da177e4 LT |
1379 | dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n"); |
1380 | return 1; | |
1381 | } | |
1382 | ||
1383 | /* Flush FIFO */ | |
1384 | clear_fifo(acb, "start_scsi"); | |
1385 | DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); | |
1386 | DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); | |
1387 | DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); | |
1388 | DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); | |
1389 | srb->scsi_phase = PH_BUS_FREE; /* initial phase */ | |
1390 | ||
1391 | identify_message = dcb->identify_msg; | |
1392 | /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */ | |
1393 | /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */ | |
1394 | if (srb->flag & AUTO_REQSENSE) | |
1395 | identify_message &= 0xBF; | |
1396 | ||
1397 | if (((srb->cmd->cmnd[0] == INQUIRY) | |
1398 | || (srb->cmd->cmnd[0] == REQUEST_SENSE) | |
1399 | || (srb->flag & AUTO_REQSENSE)) | |
1400 | && (((dcb->sync_mode & WIDE_NEGO_ENABLE) | |
1401 | && !(dcb->sync_mode & WIDE_NEGO_DONE)) | |
1402 | || ((dcb->sync_mode & SYNC_NEGO_ENABLE) | |
1403 | && !(dcb->sync_mode & SYNC_NEGO_DONE))) | |
1404 | && (dcb->target_lun == 0)) { | |
1405 | srb->msgout_buf[0] = identify_message; | |
1406 | srb->msg_count = 1; | |
1407 | scsicommand = SCMD_SEL_ATNSTOP; | |
1408 | srb->state = SRB_MSGOUT; | |
1409 | #ifndef SYNC_FIRST | |
1410 | if (dcb->sync_mode & WIDE_NEGO_ENABLE | |
1411 | && dcb->inquiry7 & SCSI_INQ_WBUS16) { | |
1412 | build_wdtr(acb, dcb, srb); | |
1413 | goto no_cmd; | |
1414 | } | |
1415 | #endif | |
1416 | if (dcb->sync_mode & SYNC_NEGO_ENABLE | |
1417 | && dcb->inquiry7 & SCSI_INQ_SYNC) { | |
1418 | build_sdtr(acb, dcb, srb); | |
1419 | goto no_cmd; | |
1420 | } | |
1421 | if (dcb->sync_mode & WIDE_NEGO_ENABLE | |
1422 | && dcb->inquiry7 & SCSI_INQ_WBUS16) { | |
1423 | build_wdtr(acb, dcb, srb); | |
1424 | goto no_cmd; | |
1425 | } | |
1426 | srb->msg_count = 0; | |
1427 | } | |
1428 | /* Send identify message */ | |
1429 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message); | |
1430 | ||
1431 | scsicommand = SCMD_SEL_ATN; | |
1432 | srb->state = SRB_START_; | |
1433 | #ifndef DC395x_NO_TAGQ | |
1434 | if ((dcb->sync_mode & EN_TAG_QUEUEING) | |
1435 | && (identify_message & 0xC0)) { | |
1436 | /* Send Tag message */ | |
1437 | u32 tag_mask = 1; | |
1438 | u8 tag_number = 0; | |
1439 | while (tag_mask & dcb->tag_mask | |
d8187b94 | 1440 | && tag_number < dcb->max_command) { |
1da177e4 LT |
1441 | tag_mask = tag_mask << 1; |
1442 | tag_number++; | |
1443 | } | |
1444 | if (tag_number >= dcb->max_command) { | |
5cd049a5 | 1445 | dprintkl(KERN_WARNING, "start_scsi: (0x%p) " |
1da177e4 | 1446 | "Out of tags target=<%02i-%i>)\n", |
5cd049a5 | 1447 | srb->cmd, srb->cmd->device->id, |
9cb78c16 | 1448 | (u8)srb->cmd->device->lun); |
1da177e4 LT |
1449 | srb->state = SRB_READY; |
1450 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, | |
1451 | DO_HWRESELECT); | |
1452 | return 1; | |
1453 | } | |
1454 | /* Send Tag id */ | |
9c2d2670 | 1455 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SIMPLE_QUEUE_TAG); |
1da177e4 LT |
1456 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number); |
1457 | dcb->tag_mask |= tag_mask; | |
1458 | srb->tag_number = tag_number; | |
1459 | scsicommand = SCMD_SEL_ATN3; | |
1460 | srb->state = SRB_START_; | |
1461 | } | |
1462 | #endif | |
1463 | /*polling:*/ | |
1464 | /* Send CDB ..command block ......... */ | |
5cd049a5 | 1465 | dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n", |
9cb78c16 | 1466 | srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun, |
1da177e4 LT |
1467 | srb->cmd->cmnd[0], srb->tag_number); |
1468 | if (srb->flag & AUTO_REQSENSE) { | |
1469 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); | |
1470 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); | |
1471 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); | |
1472 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); | |
b80ca4f7 | 1473 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE); |
1da177e4 LT |
1474 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); |
1475 | } else { | |
1476 | ptr = (u8 *)srb->cmd->cmnd; | |
1477 | for (i = 0; i < srb->cmd->cmd_len; i++) | |
1478 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); | |
1479 | } | |
1480 | no_cmd: | |
1481 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, | |
1482 | DO_HWRESELECT | DO_DATALATCH); | |
1483 | if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { | |
1484 | /* | |
1485 | * If start_scsi return 1: | |
1486 | * we caught an interrupt (must be reset or reselection ... ) | |
1487 | * : Let's process it first! | |
1488 | */ | |
5cd049a5 CH |
1489 | dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n", |
1490 | srb->cmd, dcb->target_id, dcb->target_lun); | |
1da177e4 LT |
1491 | srb->state = SRB_READY; |
1492 | free_tag(dcb, srb); | |
1493 | srb->msg_count = 0; | |
1494 | return_code = 1; | |
1495 | /* This IRQ should NOT get lost, as we did not acknowledge it */ | |
1496 | } else { | |
1497 | /* | |
1498 | * If start_scsi returns 0: | |
1499 | * we know that the SCSI processor is free | |
1500 | */ | |
1501 | srb->scsi_phase = PH_BUS_FREE; /* initial phase */ | |
1502 | dcb->active_srb = srb; | |
1503 | acb->active_dcb = dcb; | |
1504 | return_code = 0; | |
1505 | /* it's important for atn stop */ | |
1506 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, | |
1507 | DO_DATALATCH | DO_HWRESELECT); | |
1508 | /* SCSI command */ | |
1509 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand); | |
1510 | } | |
1511 | return return_code; | |
1512 | } | |
1513 | ||
1514 | ||
1515 | #define DC395x_ENABLE_MSGOUT \ | |
1516 | DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \ | |
1517 | srb->state |= SRB_MSGOUT | |
1518 | ||
1519 | ||
1520 | /* abort command */ | |
1521 | static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, | |
1522 | struct ScsiReqBlk *srb) | |
1523 | { | |
1524 | srb->msgout_buf[0] = ABORT; | |
1525 | srb->msg_count = 1; | |
1526 | DC395x_ENABLE_MSGOUT; | |
1527 | srb->state &= ~SRB_MSGIN; | |
1528 | srb->state |= SRB_MSGOUT; | |
1529 | } | |
1530 | ||
1531 | ||
1532 | /** | |
1533 | * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to | |
1534 | * have been triggered for this card. | |
1535 | * | |
1536 | * @acb: a pointer to the adpter control block | |
1537 | * @scsi_status: the status return when we checked the card | |
1538 | **/ | |
1539 | static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb, | |
1540 | u16 scsi_status) | |
1541 | { | |
1542 | struct DeviceCtlBlk *dcb; | |
1543 | struct ScsiReqBlk *srb; | |
1544 | u16 phase; | |
1545 | u8 scsi_intstatus; | |
1546 | unsigned long flags; | |
1547 | void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *, | |
1548 | u16 *); | |
1549 | ||
1550 | DC395x_LOCK_IO(acb->scsi_host, flags); | |
1551 | ||
1552 | /* This acknowledges the IRQ */ | |
1553 | scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); | |
1554 | if ((scsi_status & 0x2007) == 0x2002) | |
1555 | dprintkl(KERN_DEBUG, | |
1556 | "COP after COP completed? %04x\n", scsi_status); | |
1557 | if (debug_enabled(DBG_KG)) { | |
1558 | if (scsi_intstatus & INT_SELTIMEOUT) | |
1559 | dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n"); | |
1560 | } | |
1561 | /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */ | |
1562 | ||
1563 | if (timer_pending(&acb->selto_timer)) | |
1564 | del_timer(&acb->selto_timer); | |
1565 | ||
1566 | if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) { | |
1567 | disconnect(acb); /* bus free interrupt */ | |
1568 | goto out_unlock; | |
1569 | } | |
1570 | if (scsi_intstatus & INT_RESELECTED) { | |
1571 | reselect(acb); | |
1572 | goto out_unlock; | |
1573 | } | |
1574 | if (scsi_intstatus & INT_SELECT) { | |
1575 | dprintkl(KERN_INFO, "Host does not support target mode!\n"); | |
1576 | goto out_unlock; | |
1577 | } | |
1578 | if (scsi_intstatus & INT_SCSIRESET) { | |
1579 | scsi_reset_detect(acb); | |
1580 | goto out_unlock; | |
1581 | } | |
1582 | if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) { | |
1583 | dcb = acb->active_dcb; | |
1584 | if (!dcb) { | |
1585 | dprintkl(KERN_DEBUG, | |
1586 | "Oops: BusService (%04x %02x) w/o ActiveDCB!\n", | |
1587 | scsi_status, scsi_intstatus); | |
1588 | goto out_unlock; | |
1589 | } | |
1590 | srb = dcb->active_srb; | |
1591 | if (dcb->flag & ABORT_DEV_) { | |
1592 | dprintkdbg(DBG_0, "MsgOut Abort Device.....\n"); | |
1593 | enable_msgout_abort(acb, srb); | |
1594 | } | |
1595 | ||
1596 | /* software sequential machine */ | |
1597 | phase = (u16)srb->scsi_phase; | |
1598 | ||
1599 | /* | |
1600 | * 62037 or 62137 | |
1601 | * call dc395x_scsi_phase0[]... "phase entry" | |
1602 | * handle every phase before start transfer | |
1603 | */ | |
1604 | /* data_out_phase0, phase:0 */ | |
1605 | /* data_in_phase0, phase:1 */ | |
1606 | /* command_phase0, phase:2 */ | |
1607 | /* status_phase0, phase:3 */ | |
1608 | /* nop0, phase:4 PH_BUS_FREE .. initial phase */ | |
1609 | /* nop0, phase:5 PH_BUS_FREE .. initial phase */ | |
1610 | /* msgout_phase0, phase:6 */ | |
1611 | /* msgin_phase0, phase:7 */ | |
1612 | dc395x_statev = dc395x_scsi_phase0[phase]; | |
1613 | dc395x_statev(acb, srb, &scsi_status); | |
1614 | ||
1615 | /* | |
25985edc | 1616 | * if there were any exception occurred scsi_status |
1da177e4 LT |
1617 | * will be modify to bus free phase new scsi_status |
1618 | * transfer out from ... previous dc395x_statev | |
1619 | */ | |
1620 | srb->scsi_phase = scsi_status & PHASEMASK; | |
1621 | phase = (u16)scsi_status & PHASEMASK; | |
1622 | ||
1623 | /* | |
1624 | * call dc395x_scsi_phase1[]... "phase entry" handle | |
1625 | * every phase to do transfer | |
1626 | */ | |
1627 | /* data_out_phase1, phase:0 */ | |
1628 | /* data_in_phase1, phase:1 */ | |
1629 | /* command_phase1, phase:2 */ | |
1630 | /* status_phase1, phase:3 */ | |
1631 | /* nop1, phase:4 PH_BUS_FREE .. initial phase */ | |
1632 | /* nop1, phase:5 PH_BUS_FREE .. initial phase */ | |
1633 | /* msgout_phase1, phase:6 */ | |
1634 | /* msgin_phase1, phase:7 */ | |
1635 | dc395x_statev = dc395x_scsi_phase1[phase]; | |
1636 | dc395x_statev(acb, srb, &scsi_status); | |
1637 | } | |
1638 | out_unlock: | |
1639 | DC395x_UNLOCK_IO(acb->scsi_host, flags); | |
1640 | } | |
1641 | ||
1642 | ||
7d12e780 | 1643 | static irqreturn_t dc395x_interrupt(int irq, void *dev_id) |
1da177e4 | 1644 | { |
c7bec5ab | 1645 | struct AdapterCtlBlk *acb = dev_id; |
1da177e4 LT |
1646 | u16 scsi_status; |
1647 | u8 dma_status; | |
1648 | irqreturn_t handled = IRQ_NONE; | |
1649 | ||
1650 | /* | |
3a4fa0a2 | 1651 | * Check for pending interrupt |
1da177e4 LT |
1652 | */ |
1653 | scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); | |
1654 | dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); | |
1655 | if (scsi_status & SCSIINTERRUPT) { | |
3a4fa0a2 | 1656 | /* interrupt pending - let's process it! */ |
1da177e4 LT |
1657 | dc395x_handle_interrupt(acb, scsi_status); |
1658 | handled = IRQ_HANDLED; | |
1659 | } | |
1660 | else if (dma_status & 0x20) { | |
1661 | /* Error from the DMA engine */ | |
1662 | dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status); | |
1663 | #if 0 | |
1664 | dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n"); | |
1665 | if (acb->active_dcb) { | |
1666 | acb->active_dcb-> flag |= ABORT_DEV_; | |
1667 | if (acb->active_dcb->active_srb) | |
1668 | enable_msgout_abort(acb, acb->active_dcb->active_srb); | |
1669 | } | |
1670 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO); | |
1671 | #else | |
1672 | dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n"); | |
1673 | acb = NULL; | |
1674 | #endif | |
1675 | handled = IRQ_HANDLED; | |
1676 | } | |
1677 | ||
1678 | return handled; | |
1679 | } | |
1680 | ||
1681 | ||
1682 | static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
1683 | u16 *pscsi_status) | |
1684 | { | |
5cd049a5 | 1685 | dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd); |
1da177e4 LT |
1686 | if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT)) |
1687 | *pscsi_status = PH_BUS_FREE; /*.. initial phase */ | |
1688 | ||
1689 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ | |
1690 | srb->state &= ~SRB_MSGOUT; | |
1691 | } | |
1692 | ||
1693 | ||
1694 | static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
1695 | u16 *pscsi_status) | |
1696 | { | |
1697 | u16 i; | |
1698 | u8 *ptr; | |
5cd049a5 | 1699 | dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd); |
1da177e4 LT |
1700 | |
1701 | clear_fifo(acb, "msgout_phase1"); | |
1702 | if (!(srb->state & SRB_MSGOUT)) { | |
1703 | srb->state |= SRB_MSGOUT; | |
1704 | dprintkl(KERN_DEBUG, | |
5cd049a5 CH |
1705 | "msgout_phase1: (0x%p) Phase unexpected\n", |
1706 | srb->cmd); /* So what ? */ | |
1da177e4 LT |
1707 | } |
1708 | if (!srb->msg_count) { | |
5cd049a5 CH |
1709 | dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n", |
1710 | srb->cmd); | |
9c2d2670 HR |
1711 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, NOP); |
1712 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); | |
1713 | /* it's important for atn stop */ | |
1da177e4 LT |
1714 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); |
1715 | return; | |
1716 | } | |
1717 | ptr = (u8 *)srb->msgout_buf; | |
1718 | for (i = 0; i < srb->msg_count; i++) | |
1719 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); | |
1720 | srb->msg_count = 0; | |
9c2d2670 | 1721 | if (srb->msgout_buf[0] == ABORT_TASK_SET) |
1da177e4 LT |
1722 | srb->state = SRB_ABORT_SENT; |
1723 | ||
1724 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); | |
1725 | } | |
1726 | ||
1727 | ||
1728 | static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
1729 | u16 *pscsi_status) | |
1730 | { | |
5cd049a5 | 1731 | dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd); |
1da177e4 LT |
1732 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); |
1733 | } | |
1734 | ||
1735 | ||
1736 | static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
1737 | u16 *pscsi_status) | |
1738 | { | |
1739 | struct DeviceCtlBlk *dcb; | |
1740 | u8 *ptr; | |
1741 | u16 i; | |
5cd049a5 | 1742 | dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd); |
1da177e4 LT |
1743 | |
1744 | clear_fifo(acb, "command_phase1"); | |
1745 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN); | |
1746 | if (!(srb->flag & AUTO_REQSENSE)) { | |
1747 | ptr = (u8 *)srb->cmd->cmnd; | |
1748 | for (i = 0; i < srb->cmd->cmd_len; i++) { | |
1749 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr); | |
1750 | ptr++; | |
1751 | } | |
1752 | } else { | |
1753 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); | |
1754 | dcb = acb->active_dcb; | |
1755 | /* target id */ | |
1756 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); | |
1757 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); | |
1758 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); | |
b80ca4f7 | 1759 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE); |
1da177e4 LT |
1760 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); |
1761 | } | |
1762 | srb->state |= SRB_COMMAND; | |
1763 | /* it's important for atn stop */ | |
1764 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); | |
1765 | /* SCSI command */ | |
1766 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); | |
1767 | } | |
1768 | ||
1769 | ||
1770 | /* | |
1771 | * Verify that the remaining space in the hw sg lists is the same as | |
1772 | * the count of remaining bytes in srb->total_xfer_length | |
1773 | */ | |
1774 | static void sg_verify_length(struct ScsiReqBlk *srb) | |
1775 | { | |
1776 | if (debug_enabled(DBG_SG)) { | |
1777 | unsigned len = 0; | |
1778 | unsigned idx = srb->sg_index; | |
1779 | struct SGentry *psge = srb->segment_x + idx; | |
1780 | for (; idx < srb->sg_count; psge++, idx++) | |
1781 | len += psge->length; | |
1782 | if (len != srb->total_xfer_length) | |
1783 | dprintkdbg(DBG_SG, | |
1784 | "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n", | |
1785 | srb->total_xfer_length, len); | |
1786 | } | |
1787 | } | |
1788 | ||
1789 | ||
1790 | /* | |
1791 | * Compute the next Scatter Gather list index and adjust its length | |
cdb8c2a6 | 1792 | * and address if necessary |
1da177e4 LT |
1793 | */ |
1794 | static void sg_update_list(struct ScsiReqBlk *srb, u32 left) | |
1795 | { | |
1796 | u8 idx; | |
25985edc | 1797 | u32 xferred = srb->total_xfer_length - left; /* bytes transferred */ |
1da177e4 | 1798 | struct SGentry *psge = srb->segment_x + srb->sg_index; |
1da177e4 LT |
1799 | |
1800 | dprintkdbg(DBG_0, | |
25985edc | 1801 | "sg_update_list: Transferred %i of %i bytes, %i remain\n", |
1da177e4 LT |
1802 | xferred, srb->total_xfer_length, left); |
1803 | if (xferred == 0) { | |
1804 | /* nothing to update since we did not transfer any data */ | |
1805 | return; | |
1806 | } | |
1807 | ||
1808 | sg_verify_length(srb); | |
1809 | srb->total_xfer_length = left; /* update remaining count */ | |
1810 | for (idx = srb->sg_index; idx < srb->sg_count; idx++) { | |
1811 | if (xferred >= psge->length) { | |
1812 | /* Complete SG entries done */ | |
1813 | xferred -= psge->length; | |
1814 | } else { | |
1815 | /* Partial SG entry done */ | |
dfda5e21 CH |
1816 | dma_sync_single_for_cpu(&srb->dcb->acb->dev->dev, |
1817 | srb->sg_bus_addr, SEGMENTX_LEN, | |
1818 | DMA_TO_DEVICE); | |
1da177e4 LT |
1819 | psge->length -= xferred; |
1820 | psge->address += xferred; | |
1821 | srb->sg_index = idx; | |
dfda5e21 CH |
1822 | dma_sync_single_for_device(&srb->dcb->acb->dev->dev, |
1823 | srb->sg_bus_addr, SEGMENTX_LEN, | |
1824 | DMA_TO_DEVICE); | |
1da177e4 LT |
1825 | break; |
1826 | } | |
1827 | psge++; | |
1828 | } | |
1829 | sg_verify_length(srb); | |
1da177e4 LT |
1830 | } |
1831 | ||
1832 | ||
1833 | /* | |
25985edc | 1834 | * We have transferred a single byte (PIO mode?) and need to update |
1da177e4 LT |
1835 | * the count of bytes remaining (total_xfer_length) and update the sg |
1836 | * entry to either point to next byte in the current sg entry, or of | |
1837 | * already at the end to point to the start of the next sg entry | |
1838 | */ | |
1839 | static void sg_subtract_one(struct ScsiReqBlk *srb) | |
1840 | { | |
cdb8c2a6 | 1841 | sg_update_list(srb, srb->total_xfer_length - 1); |
1da177e4 LT |
1842 | } |
1843 | ||
1844 | ||
1845 | /* | |
1846 | * cleanup_after_transfer | |
1847 | * | |
1848 | * Makes sure, DMA and SCSI engine are empty, after the transfer has finished | |
1849 | * KG: Currently called from StatusPhase1 () | |
1850 | * Should probably also be called from other places | |
1851 | * Best might be to call it in DataXXPhase0, if new phase will differ | |
1852 | */ | |
1853 | static void cleanup_after_transfer(struct AdapterCtlBlk *acb, | |
1854 | struct ScsiReqBlk *srb) | |
1855 | { | |
1856 | /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */ | |
1857 | if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */ | |
1858 | if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) | |
1859 | clear_fifo(acb, "cleanup/in"); | |
1860 | if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) | |
1861 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); | |
1862 | } else { /* write */ | |
1863 | if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) | |
1864 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); | |
1865 | if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) | |
1866 | clear_fifo(acb, "cleanup/out"); | |
1867 | } | |
1868 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); | |
1869 | } | |
1870 | ||
1871 | ||
1872 | /* | |
25985edc | 1873 | * Those no of bytes will be transferred w/ PIO through the SCSI FIFO |
1da177e4 LT |
1874 | * Seems to be needed for unknown reasons; could be a hardware bug :-( |
1875 | */ | |
1876 | #define DC395x_LASTPIO 4 | |
1877 | ||
1878 | ||
1879 | static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
1880 | u16 *pscsi_status) | |
1881 | { | |
1882 | struct DeviceCtlBlk *dcb = srb->dcb; | |
1883 | u16 scsi_status = *pscsi_status; | |
1884 | u32 d_left_counter = 0; | |
5cd049a5 | 1885 | dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n", |
9cb78c16 | 1886 | srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); |
1da177e4 LT |
1887 | |
1888 | /* | |
1889 | * KG: We need to drain the buffers before we draw any conclusions! | |
1890 | * This means telling the DMA to push the rest into SCSI, telling | |
1891 | * SCSI to push the rest to the bus. | |
1892 | * However, the device might have been the one to stop us (phase | |
1893 | * change), and the data in transit just needs to be accounted so | |
1894 | * it can be retransmitted.) | |
1895 | */ | |
1896 | /* | |
1897 | * KG: Stop DMA engine pushing more data into the SCSI FIFO | |
1898 | * If we need more data, the DMA SG list will be freshly set up, anyway | |
1899 | */ | |
1900 | dprintkdbg(DBG_PIO, "data_out_phase0: " | |
cdb8c2a6 | 1901 | "DMA{fifocnt=0x%02x fifostat=0x%02x} " |
1da177e4 LT |
1902 | "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n", |
1903 | DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), | |
1904 | DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), | |
1905 | DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), | |
1906 | DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status, | |
1907 | srb->total_xfer_length); | |
1908 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO); | |
1909 | ||
1910 | if (!(srb->state & SRB_XFERPAD)) { | |
1911 | if (scsi_status & PARITYERROR) | |
1912 | srb->status |= PARITY_ERROR; | |
1913 | ||
1914 | /* | |
1915 | * KG: Right, we can't just rely on the SCSI_COUNTER, because this | |
1916 | * is the no of bytes it got from the DMA engine not the no it | |
1917 | * transferred successfully to the device. (And the difference could | |
1918 | * be as much as the FIFO size, I guess ...) | |
1919 | */ | |
1920 | if (!(scsi_status & SCSIXFERDONE)) { | |
1921 | /* | |
1922 | * when data transfer from DMA FIFO to SCSI FIFO | |
1923 | * if there was some data left in SCSI FIFO | |
1924 | */ | |
1925 | d_left_counter = | |
1926 | (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & | |
1927 | 0x1F); | |
1928 | if (dcb->sync_period & WIDE_SYNC) | |
1929 | d_left_counter <<= 1; | |
1930 | ||
1931 | dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n" | |
1932 | "SCSI{fifocnt=0x%02x cnt=0x%08x} " | |
1933 | "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n", | |
1934 | DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), | |
1935 | (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", | |
1936 | DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), | |
1937 | DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), | |
1938 | DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), | |
1939 | DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), | |
1940 | DC395x_read32(acb, TRM_S1040_DMA_CXCNT)); | |
1941 | } | |
1942 | /* | |
b4b08e58 | 1943 | * calculate all the residue data that not yet tranfered |
1da177e4 LT |
1944 | * SCSI transfer counter + left in SCSI FIFO data |
1945 | * | |
1946 | * .....TRM_S1040_SCSI_COUNTER (24bits) | |
1947 | * The counter always decrement by one for every SCSI byte transfer. | |
1948 | * .....TRM_S1040_SCSI_FIFOCNT ( 5bits) | |
1949 | * The counter is SCSI FIFO offset counter (in units of bytes or! words) | |
1950 | */ | |
1951 | if (srb->total_xfer_length > DC395x_LASTPIO) | |
1952 | d_left_counter += | |
1953 | DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); | |
1954 | ||
1955 | /* Is this a good idea? */ | |
1956 | /*clear_fifo(acb, "DOP1"); */ | |
1957 | /* KG: What is this supposed to be useful for? WIDE padding stuff? */ | |
1958 | if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC | |
a862ea31 | 1959 | && scsi_bufflen(srb->cmd) % 2) { |
1da177e4 LT |
1960 | d_left_counter = 0; |
1961 | dprintkl(KERN_INFO, | |
1962 | "data_out_phase0: Discard 1 byte (0x%02x)\n", | |
1963 | scsi_status); | |
1964 | } | |
1965 | /* | |
1966 | * KG: Oops again. Same thinko as above: The SCSI might have been | |
1967 | * faster than the DMA engine, so that it ran out of data. | |
1968 | * In that case, we have to do just nothing! | |
1969 | * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or? | |
1970 | */ | |
1971 | /* | |
1972 | * KG: This is nonsense: We have been WRITING data to the bus | |
1973 | * If the SCSI engine has no bytes left, how should the DMA engine? | |
1974 | */ | |
1975 | if (d_left_counter == 0) { | |
1976 | srb->total_xfer_length = 0; | |
1977 | } else { | |
1978 | /* | |
1979 | * if transfer not yet complete | |
1980 | * there were some data residue in SCSI FIFO or | |
1981 | * SCSI transfer counter not empty | |
1982 | */ | |
1983 | long oldxferred = | |
1984 | srb->total_xfer_length - d_left_counter; | |
1985 | const int diff = | |
1986 | (dcb->sync_period & WIDE_SYNC) ? 2 : 1; | |
1987 | sg_update_list(srb, d_left_counter); | |
1988 | /* KG: Most ugly hack! Apparently, this works around a chip bug */ | |
1989 | if ((srb->segment_x[srb->sg_index].length == | |
a862ea31 | 1990 | diff && scsi_sg_count(srb->cmd)) |
1da177e4 LT |
1991 | || ((oldxferred & ~PAGE_MASK) == |
1992 | (PAGE_SIZE - diff)) | |
1993 | ) { | |
1994 | dprintkl(KERN_INFO, "data_out_phase0: " | |
1995 | "Work around chip bug (%i)?\n", diff); | |
1996 | d_left_counter = | |
1997 | srb->total_xfer_length - diff; | |
1998 | sg_update_list(srb, d_left_counter); | |
1999 | /*srb->total_xfer_length -= diff; */ | |
2000 | /*srb->virt_addr += diff; */ | |
2001 | /*if (srb->cmd->use_sg) */ | |
2002 | /* srb->sg_index++; */ | |
2003 | } | |
2004 | } | |
2005 | } | |
2006 | if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) { | |
2007 | cleanup_after_transfer(acb, srb); | |
2008 | } | |
2009 | } | |
2010 | ||
2011 | ||
2012 | static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
2013 | u16 *pscsi_status) | |
2014 | { | |
5cd049a5 | 2015 | dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n", |
9cb78c16 | 2016 | srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); |
1da177e4 LT |
2017 | clear_fifo(acb, "data_out_phase1"); |
2018 | /* do prepare before transfer when data out phase */ | |
2019 | data_io_transfer(acb, srb, XFERDATAOUT); | |
2020 | } | |
2021 | ||
1da177e4 LT |
2022 | static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
2023 | u16 *pscsi_status) | |
2024 | { | |
2025 | u16 scsi_status = *pscsi_status; | |
cdb8c2a6 | 2026 | |
5cd049a5 | 2027 | dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n", |
9cb78c16 | 2028 | srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); |
1da177e4 LT |
2029 | |
2030 | /* | |
2031 | * KG: DataIn is much more tricky than DataOut. When the device is finished | |
2032 | * and switches to another phase, the SCSI engine should be finished too. | |
2033 | * But: There might still be bytes left in its FIFO to be fetched by the DMA | |
2034 | * engine and transferred to memory. | |
2035 | * We should wait for the FIFOs to be emptied by that (is there any way to | |
2036 | * enforce this?) and then stop the DMA engine, because it might think, that | |
2037 | * there are more bytes to follow. Yes, the device might disconnect prior to | |
2038 | * having all bytes transferred! | |
2039 | * Also we should make sure that all data from the DMA engine buffer's really | |
2040 | * made its way to the system memory! Some documentation on this would not | |
2041 | * seem to be a bad idea, actually. | |
2042 | */ | |
2043 | if (!(srb->state & SRB_XFERPAD)) { | |
cdb8c2a6 GL |
2044 | u32 d_left_counter; |
2045 | unsigned int sc, fc; | |
2046 | ||
1da177e4 | 2047 | if (scsi_status & PARITYERROR) { |
5cd049a5 CH |
2048 | dprintkl(KERN_INFO, "data_in_phase0: (0x%p) " |
2049 | "Parity Error\n", srb->cmd); | |
1da177e4 LT |
2050 | srb->status |= PARITY_ERROR; |
2051 | } | |
2052 | /* | |
2053 | * KG: We should wait for the DMA FIFO to be empty ... | |
2054 | * but: it would be better to wait first for the SCSI FIFO and then the | |
2055 | * the DMA FIFO to become empty? How do we know, that the device not already | |
2056 | * sent data to the FIFO in a MsgIn phase, eg.? | |
2057 | */ | |
2058 | if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) { | |
2059 | #if 0 | |
2060 | int ctr = 6000000; | |
2061 | dprintkl(KERN_DEBUG, | |
2062 | "DIP0: Wait for DMA FIFO to flush ...\n"); | |
2063 | /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */ | |
2064 | /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */ | |
2065 | /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */ | |
2066 | while (! | |
2067 | (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) & | |
2068 | 0x80) && --ctr); | |
2069 | if (ctr < 6000000 - 1) | |
2070 | dprintkl(KERN_DEBUG | |
2071 | "DIP0: Had to wait for DMA ...\n"); | |
2072 | if (!ctr) | |
2073 | dprintkl(KERN_ERR, | |
2074 | "Deadlock in DIP0 waiting for DMA FIFO empty!!\n"); | |
2075 | /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */ | |
2076 | #endif | |
2077 | dprintkdbg(DBG_KG, "data_in_phase0: " | |
2078 | "DMA{fifocnt=0x%02x fifostat=0x%02x}\n", | |
2079 | DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), | |
2080 | DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT)); | |
2081 | } | |
2082 | /* Now: Check remainig data: The SCSI counters should tell us ... */ | |
cdb8c2a6 GL |
2083 | sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); |
2084 | fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); | |
2085 | d_left_counter = sc + ((fc & 0x1f) | |
1da177e4 LT |
2086 | << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 : |
2087 | 0)); | |
2088 | dprintkdbg(DBG_KG, "data_in_phase0: " | |
2089 | "SCSI{fifocnt=0x%02x%s ctr=0x%08x} " | |
2090 | "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} " | |
2091 | "Remain{totxfer=%i scsi_fifo+ctr=%i}\n", | |
cdb8c2a6 | 2092 | fc, |
1da177e4 | 2093 | (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", |
cdb8c2a6 GL |
2094 | sc, |
2095 | fc, | |
1da177e4 LT |
2096 | DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), |
2097 | DC395x_read32(acb, TRM_S1040_DMA_CXCNT), | |
2098 | srb->total_xfer_length, d_left_counter); | |
2099 | #if DC395x_LASTPIO | |
25985edc | 2100 | /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */ |
1da177e4 LT |
2101 | if (d_left_counter |
2102 | && srb->total_xfer_length <= DC395x_LASTPIO) { | |
cdb8c2a6 GL |
2103 | size_t left_io = srb->total_xfer_length; |
2104 | ||
1da177e4 LT |
2105 | /*u32 addr = (srb->segment_x[srb->sg_index].address); */ |
2106 | /*sg_update_list (srb, d_left_counter); */ | |
cdb8c2a6 GL |
2107 | dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) " |
2108 | "for remaining %i bytes:", | |
2109 | fc & 0x1f, | |
1da177e4 LT |
2110 | (srb->dcb->sync_period & WIDE_SYNC) ? |
2111 | "words" : "bytes", | |
1da177e4 LT |
2112 | srb->total_xfer_length); |
2113 | if (srb->dcb->sync_period & WIDE_SYNC) | |
2114 | DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, | |
2115 | CFG2_WIDEFIFO); | |
cdb8c2a6 GL |
2116 | while (left_io) { |
2117 | unsigned char *virt, *base = NULL; | |
2118 | unsigned long flags = 0; | |
2119 | size_t len = left_io; | |
a862ea31 FT |
2120 | size_t offset = srb->request_length - left_io; |
2121 | ||
2122 | local_irq_save(flags); | |
2123 | /* Assumption: it's inside one page as it's at most 4 bytes and | |
2124 | I just assume it's on a 4-byte boundary */ | |
2125 | base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd), | |
2126 | srb->sg_count, &offset, &len); | |
2127 | virt = base + offset; | |
cdb8c2a6 | 2128 | |
cdb8c2a6 GL |
2129 | left_io -= len; |
2130 | ||
2131 | while (len) { | |
2132 | u8 byte; | |
2133 | byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); | |
2134 | *virt++ = byte; | |
2135 | ||
1da177e4 LT |
2136 | if (debug_enabled(DBG_PIO)) |
2137 | printk(" %02x", byte); | |
cdb8c2a6 GL |
2138 | |
2139 | d_left_counter--; | |
2140 | sg_subtract_one(srb); | |
2141 | ||
2142 | len--; | |
2143 | ||
2144 | fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); | |
2145 | ||
2146 | if (fc == 0x40) { | |
2147 | left_io = 0; | |
2148 | break; | |
2149 | } | |
2150 | } | |
2151 | ||
2152 | WARN_ON((fc != 0x40) == !d_left_counter); | |
2153 | ||
2154 | if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) { | |
2155 | /* Read the last byte ... */ | |
2156 | if (srb->total_xfer_length > 0) { | |
2157 | u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); | |
2158 | ||
2159 | *virt++ = byte; | |
2160 | srb->total_xfer_length--; | |
2161 | if (debug_enabled(DBG_PIO)) | |
2162 | printk(" %02x", byte); | |
2163 | } | |
2164 | ||
2165 | DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); | |
2166 | } | |
2167 | ||
a862ea31 FT |
2168 | scsi_kunmap_atomic_sg(base); |
2169 | local_irq_restore(flags); | |
1da177e4 LT |
2170 | } |
2171 | /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */ | |
2172 | /*srb->total_xfer_length = 0; */ | |
2173 | if (debug_enabled(DBG_PIO)) | |
2174 | printk("\n"); | |
2175 | } | |
2176 | #endif /* DC395x_LASTPIO */ | |
2177 | ||
2178 | #if 0 | |
2179 | /* | |
2180 | * KG: This was in DATAOUT. Does it also belong here? | |
2181 | * Nobody seems to know what counter and fifo_cnt count exactly ... | |
2182 | */ | |
2183 | if (!(scsi_status & SCSIXFERDONE)) { | |
2184 | /* | |
2185 | * when data transfer from DMA FIFO to SCSI FIFO | |
2186 | * if there was some data left in SCSI FIFO | |
2187 | */ | |
2188 | d_left_counter = | |
2189 | (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & | |
2190 | 0x1F); | |
2191 | if (srb->dcb->sync_period & WIDE_SYNC) | |
2192 | d_left_counter <<= 1; | |
2193 | /* | |
2194 | * if WIDE scsi SCSI FIFOCNT unit is word !!! | |
2195 | * so need to *= 2 | |
2196 | * KG: Seems to be correct ... | |
2197 | */ | |
2198 | } | |
2199 | #endif | |
2200 | /* KG: This should not be needed any more! */ | |
2201 | if (d_left_counter == 0 | |
2202 | || (scsi_status & SCSIXFERCNT_2_ZERO)) { | |
2203 | #if 0 | |
2204 | int ctr = 6000000; | |
2205 | u8 TempDMAstatus; | |
2206 | do { | |
2207 | TempDMAstatus = | |
2208 | DC395x_read8(acb, TRM_S1040_DMA_STATUS); | |
2209 | } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr); | |
2210 | if (!ctr) | |
2211 | dprintkl(KERN_ERR, | |
2212 | "Deadlock in DataInPhase0 waiting for DMA!!\n"); | |
2213 | srb->total_xfer_length = 0; | |
2214 | #endif | |
2215 | srb->total_xfer_length = d_left_counter; | |
2216 | } else { /* phase changed */ | |
2217 | /* | |
2218 | * parsing the case: | |
2219 | * when a transfer not yet complete | |
2220 | * but be disconnected by target | |
2221 | * if transfer not yet complete | |
2222 | * there were some data residue in SCSI FIFO or | |
2223 | * SCSI transfer counter not empty | |
2224 | */ | |
2225 | sg_update_list(srb, d_left_counter); | |
2226 | } | |
2227 | } | |
2228 | /* KG: The target may decide to disconnect: Empty FIFO before! */ | |
2229 | if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) { | |
2230 | cleanup_after_transfer(acb, srb); | |
2231 | } | |
2232 | } | |
2233 | ||
2234 | ||
2235 | static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
2236 | u16 *pscsi_status) | |
2237 | { | |
5cd049a5 | 2238 | dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n", |
9cb78c16 | 2239 | srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); |
1da177e4 LT |
2240 | data_io_transfer(acb, srb, XFERDATAIN); |
2241 | } | |
2242 | ||
2243 | ||
2244 | static void data_io_transfer(struct AdapterCtlBlk *acb, | |
2245 | struct ScsiReqBlk *srb, u16 io_dir) | |
2246 | { | |
2247 | struct DeviceCtlBlk *dcb = srb->dcb; | |
2248 | u8 bval; | |
2249 | dprintkdbg(DBG_0, | |
5cd049a5 | 2250 | "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n", |
9cb78c16 | 2251 | srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun, |
1da177e4 LT |
2252 | ((io_dir & DMACMD_DIR) ? 'r' : 'w'), |
2253 | srb->total_xfer_length, srb->sg_index, srb->sg_count); | |
2254 | if (srb == acb->tmp_srb) | |
2255 | dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n"); | |
2256 | if (srb->sg_index >= srb->sg_count) { | |
2257 | /* can't happen? out of bounds error */ | |
2258 | return; | |
2259 | } | |
2260 | ||
2261 | if (srb->total_xfer_length > DC395x_LASTPIO) { | |
2262 | u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); | |
2263 | /* | |
2264 | * KG: What should we do: Use SCSI Cmd 0x90/0x92? | |
2265 | * Maybe, even ABORTXFER would be appropriate | |
2266 | */ | |
2267 | if (dma_status & XFERPENDING) { | |
2268 | dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! " | |
2269 | "Expect trouble!\n"); | |
2270 | dump_register_info(acb, dcb, srb); | |
2271 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); | |
2272 | } | |
2273 | /* clear_fifo(acb, "IO"); */ | |
2274 | /* | |
2275 | * load what physical address of Scatter/Gather list table | |
2276 | * want to be transfer | |
2277 | */ | |
2278 | srb->state |= SRB_DATA_XFER; | |
2279 | DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0); | |
a862ea31 | 2280 | if (scsi_sg_count(srb->cmd)) { /* with S/G */ |
1da177e4 LT |
2281 | io_dir |= DMACMD_SG; |
2282 | DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, | |
2283 | srb->sg_bus_addr + | |
2284 | sizeof(struct SGentry) * | |
2285 | srb->sg_index); | |
2286 | /* load how many bytes in the sg list table */ | |
2287 | DC395x_write32(acb, TRM_S1040_DMA_XCNT, | |
2288 | ((u32)(srb->sg_count - | |
2289 | srb->sg_index) << 3)); | |
2290 | } else { /* without S/G */ | |
2291 | io_dir &= ~DMACMD_SG; | |
2292 | DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, | |
2293 | srb->segment_x[0].address); | |
2294 | DC395x_write32(acb, TRM_S1040_DMA_XCNT, | |
2295 | srb->segment_x[0].length); | |
2296 | } | |
2297 | /* load total transfer length (24bits) max value 16Mbyte */ | |
2298 | DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, | |
2299 | srb->total_xfer_length); | |
2300 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ | |
2301 | if (io_dir & DMACMD_DIR) { /* read */ | |
2302 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, | |
2303 | SCMD_DMA_IN); | |
2304 | DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); | |
2305 | } else { | |
2306 | DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); | |
2307 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, | |
2308 | SCMD_DMA_OUT); | |
2309 | } | |
2310 | ||
2311 | } | |
2312 | #if DC395x_LASTPIO | |
2313 | else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */ | |
2314 | /* | |
2315 | * load what physical address of Scatter/Gather list table | |
2316 | * want to be transfer | |
2317 | */ | |
2318 | srb->state |= SRB_DATA_XFER; | |
2319 | /* load total transfer length (24bits) max value 16Mbyte */ | |
2320 | DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, | |
2321 | srb->total_xfer_length); | |
2322 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ | |
2323 | if (io_dir & DMACMD_DIR) { /* read */ | |
2324 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, | |
2325 | SCMD_FIFO_IN); | |
2326 | } else { /* write */ | |
2327 | int ln = srb->total_xfer_length; | |
cdb8c2a6 GL |
2328 | size_t left_io = srb->total_xfer_length; |
2329 | ||
1da177e4 LT |
2330 | if (srb->dcb->sync_period & WIDE_SYNC) |
2331 | DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, | |
2332 | CFG2_WIDEFIFO); | |
1da177e4 | 2333 | |
cdb8c2a6 GL |
2334 | while (left_io) { |
2335 | unsigned char *virt, *base = NULL; | |
2336 | unsigned long flags = 0; | |
2337 | size_t len = left_io; | |
a862ea31 FT |
2338 | size_t offset = srb->request_length - left_io; |
2339 | ||
2340 | local_irq_save(flags); | |
2341 | /* Again, max 4 bytes */ | |
2342 | base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd), | |
2343 | srb->sg_count, &offset, &len); | |
2344 | virt = base + offset; | |
cdb8c2a6 | 2345 | |
cdb8c2a6 GL |
2346 | left_io -= len; |
2347 | ||
2348 | while (len--) { | |
2349 | if (debug_enabled(DBG_PIO)) | |
2350 | printk(" %02x", *virt); | |
1da177e4 | 2351 | |
cdb8c2a6 | 2352 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++); |
1da177e4 | 2353 | |
cdb8c2a6 GL |
2354 | sg_subtract_one(srb); |
2355 | } | |
2356 | ||
a862ea31 FT |
2357 | scsi_kunmap_atomic_sg(base); |
2358 | local_irq_restore(flags); | |
1da177e4 LT |
2359 | } |
2360 | if (srb->dcb->sync_period & WIDE_SYNC) { | |
2361 | if (ln % 2) { | |
2362 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); | |
2363 | if (debug_enabled(DBG_PIO)) | |
2364 | printk(" |00"); | |
2365 | } | |
2366 | DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); | |
2367 | } | |
2368 | /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */ | |
2369 | if (debug_enabled(DBG_PIO)) | |
2370 | printk("\n"); | |
2371 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, | |
2372 | SCMD_FIFO_OUT); | |
2373 | } | |
2374 | } | |
2375 | #endif /* DC395x_LASTPIO */ | |
2376 | else { /* xfer pad */ | |
1da177e4 LT |
2377 | if (srb->sg_count) { |
2378 | srb->adapter_status = H_OVER_UNDER_RUN; | |
2379 | srb->status |= OVER_RUN; | |
2380 | } | |
2381 | /* | |
2382 | * KG: despite the fact that we are using 16 bits I/O ops | |
2383 | * the SCSI FIFO is only 8 bits according to the docs | |
2384 | * (we can set bit 1 in 0x8f to serialize FIFO access ...) | |
2385 | */ | |
2386 | if (dcb->sync_period & WIDE_SYNC) { | |
2387 | DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2); | |
2388 | DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, | |
2389 | CFG2_WIDEFIFO); | |
2390 | if (io_dir & DMACMD_DIR) { | |
67056d90 LJ |
2391 | DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
2392 | DC395x_read8(acb, TRM_S1040_SCSI_FIFO); | |
1da177e4 LT |
2393 | } else { |
2394 | /* Danger, Robinson: If you find KGs | |
2395 | * scattered over the wide disk, the driver | |
2396 | * or chip is to blame :-( */ | |
2397 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); | |
2398 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G'); | |
2399 | } | |
2400 | DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); | |
2401 | } else { | |
2402 | DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); | |
2403 | /* Danger, Robinson: If you find a collection of Ks on your disk | |
2404 | * something broke :-( */ | |
2405 | if (io_dir & DMACMD_DIR) | |
67056d90 | 2406 | DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
1da177e4 LT |
2407 | else |
2408 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); | |
2409 | } | |
2410 | srb->state |= SRB_XFERPAD; | |
2411 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ | |
2412 | /* SCSI command */ | |
2413 | bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT; | |
2414 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval); | |
2415 | } | |
2416 | } | |
2417 | ||
2418 | ||
2419 | static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
2420 | u16 *pscsi_status) | |
2421 | { | |
5cd049a5 | 2422 | dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n", |
9cb78c16 | 2423 | srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); |
1da177e4 LT |
2424 | srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
2425 | srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */ | |
2426 | srb->state = SRB_COMPLETED; | |
2427 | *pscsi_status = PH_BUS_FREE; /*.. initial phase */ | |
2428 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ | |
2429 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); | |
2430 | } | |
2431 | ||
2432 | ||
2433 | static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
2434 | u16 *pscsi_status) | |
2435 | { | |
5cd049a5 | 2436 | dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n", |
9cb78c16 | 2437 | srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); |
1da177e4 LT |
2438 | srb->state = SRB_STATUS; |
2439 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ | |
2440 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP); | |
2441 | } | |
2442 | ||
2443 | ||
2444 | /* Check if the message is complete */ | |
2445 | static inline u8 msgin_completed(u8 * msgbuf, u32 len) | |
2446 | { | |
2447 | if (*msgbuf == EXTENDED_MESSAGE) { | |
2448 | if (len < 2) | |
2449 | return 0; | |
2450 | if (len < msgbuf[1] + 2) | |
2451 | return 0; | |
2452 | } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */ | |
2453 | if (len < 2) | |
2454 | return 0; | |
2455 | return 1; | |
2456 | } | |
2457 | ||
2458 | /* reject_msg */ | |
2459 | static inline void msgin_reject(struct AdapterCtlBlk *acb, | |
2460 | struct ScsiReqBlk *srb) | |
2461 | { | |
2462 | srb->msgout_buf[0] = MESSAGE_REJECT; | |
2463 | srb->msg_count = 1; | |
2464 | DC395x_ENABLE_MSGOUT; | |
2465 | srb->state &= ~SRB_MSGIN; | |
2466 | srb->state |= SRB_MSGOUT; | |
2467 | dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n", | |
2468 | srb->msgin_buf[0], | |
2469 | srb->dcb->target_id, srb->dcb->target_lun); | |
2470 | } | |
2471 | ||
2472 | ||
2473 | static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb, | |
2474 | struct DeviceCtlBlk *dcb, u8 tag) | |
2475 | { | |
2476 | struct ScsiReqBlk *srb = NULL; | |
2477 | struct ScsiReqBlk *i; | |
5cd049a5 CH |
2478 | dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n", |
2479 | srb->cmd, tag, srb); | |
1da177e4 LT |
2480 | |
2481 | if (!(dcb->tag_mask & (1 << tag))) | |
2482 | dprintkl(KERN_DEBUG, | |
2483 | "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n", | |
2484 | dcb->tag_mask, tag); | |
2485 | ||
2486 | if (list_empty(&dcb->srb_going_list)) | |
2487 | goto mingx0; | |
2488 | list_for_each_entry(i, &dcb->srb_going_list, list) { | |
2489 | if (i->tag_number == tag) { | |
2490 | srb = i; | |
2491 | break; | |
2492 | } | |
2493 | } | |
2494 | if (!srb) | |
2495 | goto mingx0; | |
2496 | ||
5cd049a5 CH |
2497 | dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n", |
2498 | srb->cmd, srb->dcb->target_id, srb->dcb->target_lun); | |
1da177e4 LT |
2499 | if (dcb->flag & ABORT_DEV_) { |
2500 | /*srb->state = SRB_ABORT_SENT; */ | |
2501 | enable_msgout_abort(acb, srb); | |
2502 | } | |
2503 | ||
2504 | if (!(srb->state & SRB_DISCONNECT)) | |
2505 | goto mingx0; | |
2506 | ||
2507 | memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len); | |
2508 | srb->state |= dcb->active_srb->state; | |
2509 | srb->state |= SRB_DATA_XFER; | |
2510 | dcb->active_srb = srb; | |
2511 | /* How can we make the DORS happy? */ | |
2512 | return srb; | |
2513 | ||
2514 | mingx0: | |
2515 | srb = acb->tmp_srb; | |
2516 | srb->state = SRB_UNEXPECT_RESEL; | |
2517 | dcb->active_srb = srb; | |
9c2d2670 | 2518 | srb->msgout_buf[0] = ABORT_TASK; |
1da177e4 LT |
2519 | srb->msg_count = 1; |
2520 | DC395x_ENABLE_MSGOUT; | |
2521 | dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag); | |
2522 | return srb; | |
2523 | } | |
2524 | ||
2525 | ||
2526 | static inline void reprogram_regs(struct AdapterCtlBlk *acb, | |
2527 | struct DeviceCtlBlk *dcb) | |
2528 | { | |
2529 | DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); | |
2530 | DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); | |
2531 | DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); | |
2532 | set_xfer_rate(acb, dcb); | |
2533 | } | |
2534 | ||
2535 | ||
2536 | /* set async transfer mode */ | |
2537 | static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) | |
2538 | { | |
2539 | struct DeviceCtlBlk *dcb = srb->dcb; | |
2540 | dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n", | |
2541 | dcb->target_id, dcb->target_lun); | |
2542 | ||
2543 | dcb->sync_mode &= ~(SYNC_NEGO_ENABLE); | |
2544 | dcb->sync_mode |= SYNC_NEGO_DONE; | |
2545 | /*dcb->sync_period &= 0; */ | |
2546 | dcb->sync_offset = 0; | |
2547 | dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */ | |
2548 | srb->state &= ~SRB_DO_SYNC_NEGO; | |
2549 | reprogram_regs(acb, dcb); | |
2550 | if ((dcb->sync_mode & WIDE_NEGO_ENABLE) | |
2551 | && !(dcb->sync_mode & WIDE_NEGO_DONE)) { | |
2552 | build_wdtr(acb, dcb, srb); | |
2553 | DC395x_ENABLE_MSGOUT; | |
2554 | dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n"); | |
2555 | } | |
2556 | } | |
2557 | ||
2558 | ||
2559 | /* set sync transfer mode */ | |
2560 | static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) | |
2561 | { | |
2562 | struct DeviceCtlBlk *dcb = srb->dcb; | |
2563 | u8 bval; | |
2564 | int fact; | |
2565 | dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins " | |
2566 | "(%02i.%01i MHz) Offset %i\n", | |
2567 | dcb->target_id, srb->msgin_buf[3] << 2, | |
2568 | (250 / srb->msgin_buf[3]), | |
2569 | ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3], | |
2570 | srb->msgin_buf[4]); | |
2571 | ||
2572 | if (srb->msgin_buf[4] > 15) | |
2573 | srb->msgin_buf[4] = 15; | |
2574 | if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) | |
2575 | dcb->sync_offset = 0; | |
2576 | else if (dcb->sync_offset == 0) | |
2577 | dcb->sync_offset = srb->msgin_buf[4]; | |
2578 | if (srb->msgin_buf[4] > dcb->sync_offset) | |
2579 | srb->msgin_buf[4] = dcb->sync_offset; | |
2580 | else | |
2581 | dcb->sync_offset = srb->msgin_buf[4]; | |
2582 | bval = 0; | |
2583 | while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval] | |
2584 | || dcb->min_nego_period > | |
2585 | clock_period[bval])) | |
2586 | bval++; | |
2587 | if (srb->msgin_buf[3] < clock_period[bval]) | |
2588 | dprintkl(KERN_INFO, | |
2589 | "msgin_set_sync: Increase sync nego period to %ins\n", | |
2590 | clock_period[bval] << 2); | |
2591 | srb->msgin_buf[3] = clock_period[bval]; | |
2592 | dcb->sync_period &= 0xf0; | |
2593 | dcb->sync_period |= ALT_SYNC | bval; | |
2594 | dcb->min_nego_period = srb->msgin_buf[3]; | |
2595 | ||
2596 | if (dcb->sync_period & WIDE_SYNC) | |
2597 | fact = 500; | |
2598 | else | |
2599 | fact = 250; | |
2600 | ||
2601 | dprintkl(KERN_INFO, | |
2602 | "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n", | |
2603 | dcb->target_id, (fact == 500) ? "Wide16" : "", | |
2604 | dcb->min_nego_period << 2, dcb->sync_offset, | |
2605 | (fact / dcb->min_nego_period), | |
2606 | ((fact % dcb->min_nego_period) * 10 + | |
2607 | dcb->min_nego_period / 2) / dcb->min_nego_period); | |
2608 | ||
2609 | if (!(srb->state & SRB_DO_SYNC_NEGO)) { | |
2610 | /* Reply with corrected SDTR Message */ | |
2611 | dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n", | |
2612 | srb->msgin_buf[3] << 2, srb->msgin_buf[4]); | |
2613 | ||
2614 | memcpy(srb->msgout_buf, srb->msgin_buf, 5); | |
2615 | srb->msg_count = 5; | |
2616 | DC395x_ENABLE_MSGOUT; | |
2617 | dcb->sync_mode |= SYNC_NEGO_DONE; | |
2618 | } else { | |
2619 | if ((dcb->sync_mode & WIDE_NEGO_ENABLE) | |
2620 | && !(dcb->sync_mode & WIDE_NEGO_DONE)) { | |
2621 | build_wdtr(acb, dcb, srb); | |
2622 | DC395x_ENABLE_MSGOUT; | |
2623 | dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n"); | |
2624 | } | |
2625 | } | |
2626 | srb->state &= ~SRB_DO_SYNC_NEGO; | |
2627 | dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE; | |
2628 | ||
2629 | reprogram_regs(acb, dcb); | |
2630 | } | |
2631 | ||
2632 | ||
2633 | static inline void msgin_set_nowide(struct AdapterCtlBlk *acb, | |
2634 | struct ScsiReqBlk *srb) | |
2635 | { | |
2636 | struct DeviceCtlBlk *dcb = srb->dcb; | |
2637 | dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id); | |
2638 | ||
2639 | dcb->sync_period &= ~WIDE_SYNC; | |
2640 | dcb->sync_mode &= ~(WIDE_NEGO_ENABLE); | |
2641 | dcb->sync_mode |= WIDE_NEGO_DONE; | |
2642 | srb->state &= ~SRB_DO_WIDE_NEGO; | |
2643 | reprogram_regs(acb, dcb); | |
2644 | if ((dcb->sync_mode & SYNC_NEGO_ENABLE) | |
2645 | && !(dcb->sync_mode & SYNC_NEGO_DONE)) { | |
2646 | build_sdtr(acb, dcb, srb); | |
2647 | DC395x_ENABLE_MSGOUT; | |
2648 | dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n"); | |
2649 | } | |
2650 | } | |
2651 | ||
2652 | static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) | |
2653 | { | |
2654 | struct DeviceCtlBlk *dcb = srb->dcb; | |
2655 | u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO | |
2656 | && acb->config & HCC_WIDE_CARD) ? 1 : 0; | |
2657 | dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id); | |
2658 | ||
2659 | if (srb->msgin_buf[3] > wide) | |
2660 | srb->msgin_buf[3] = wide; | |
2661 | /* Completed */ | |
2662 | if (!(srb->state & SRB_DO_WIDE_NEGO)) { | |
2663 | dprintkl(KERN_DEBUG, | |
2664 | "msgin_set_wide: Wide nego initiated <%02i>\n", | |
2665 | dcb->target_id); | |
2666 | memcpy(srb->msgout_buf, srb->msgin_buf, 4); | |
2667 | srb->msg_count = 4; | |
2668 | srb->state |= SRB_DO_WIDE_NEGO; | |
2669 | DC395x_ENABLE_MSGOUT; | |
2670 | } | |
2671 | ||
2672 | dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE); | |
2673 | if (srb->msgin_buf[3] > 0) | |
2674 | dcb->sync_period |= WIDE_SYNC; | |
2675 | else | |
2676 | dcb->sync_period &= ~WIDE_SYNC; | |
2677 | srb->state &= ~SRB_DO_WIDE_NEGO; | |
2678 | /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */ | |
2679 | dprintkdbg(DBG_1, | |
2680 | "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n", | |
2681 | (8 << srb->msgin_buf[3]), dcb->target_id); | |
2682 | reprogram_regs(acb, dcb); | |
2683 | if ((dcb->sync_mode & SYNC_NEGO_ENABLE) | |
2684 | && !(dcb->sync_mode & SYNC_NEGO_DONE)) { | |
2685 | build_sdtr(acb, dcb, srb); | |
2686 | DC395x_ENABLE_MSGOUT; | |
2687 | dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n"); | |
2688 | } | |
2689 | } | |
2690 | ||
2691 | ||
2692 | /* | |
2693 | * extended message codes: | |
2694 | * | |
2695 | * code description | |
2696 | * | |
2697 | * 02h Reserved | |
2698 | * 00h MODIFY DATA POINTER | |
2699 | * 01h SYNCHRONOUS DATA TRANSFER REQUEST | |
2700 | * 03h WIDE DATA TRANSFER REQUEST | |
2701 | * 04h - 7Fh Reserved | |
2702 | * 80h - FFh Vendor specific | |
2703 | */ | |
2704 | static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
2705 | u16 *pscsi_status) | |
2706 | { | |
2707 | struct DeviceCtlBlk *dcb = acb->active_dcb; | |
5cd049a5 | 2708 | dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd); |
1da177e4 LT |
2709 | |
2710 | srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); | |
2711 | if (msgin_completed(srb->msgin_buf, acb->msg_len)) { | |
2712 | /* Now eval the msg */ | |
2713 | switch (srb->msgin_buf[0]) { | |
2714 | case DISCONNECT: | |
2715 | srb->state = SRB_DISCONNECT; | |
2716 | break; | |
2717 | ||
2718 | case SIMPLE_QUEUE_TAG: | |
2719 | case HEAD_OF_QUEUE_TAG: | |
2720 | case ORDERED_QUEUE_TAG: | |
2721 | srb = | |
2722 | msgin_qtag(acb, dcb, | |
2723 | srb->msgin_buf[1]); | |
2724 | break; | |
2725 | ||
2726 | case MESSAGE_REJECT: | |
2727 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, | |
2728 | DO_CLRATN | DO_DATALATCH); | |
2729 | /* A sync nego message was rejected ! */ | |
2730 | if (srb->state & SRB_DO_SYNC_NEGO) { | |
2731 | msgin_set_async(acb, srb); | |
2732 | break; | |
2733 | } | |
2734 | /* A wide nego message was rejected ! */ | |
2735 | if (srb->state & SRB_DO_WIDE_NEGO) { | |
2736 | msgin_set_nowide(acb, srb); | |
2737 | break; | |
2738 | } | |
2739 | enable_msgout_abort(acb, srb); | |
2740 | /*srb->state |= SRB_ABORT_SENT */ | |
2741 | break; | |
2742 | ||
2743 | case EXTENDED_MESSAGE: | |
2744 | /* SDTR */ | |
2745 | if (srb->msgin_buf[1] == 3 | |
2746 | && srb->msgin_buf[2] == EXTENDED_SDTR) { | |
2747 | msgin_set_sync(acb, srb); | |
2748 | break; | |
2749 | } | |
2750 | /* WDTR */ | |
2751 | if (srb->msgin_buf[1] == 2 | |
2752 | && srb->msgin_buf[2] == EXTENDED_WDTR | |
2753 | && srb->msgin_buf[3] <= 2) { /* sanity check ... */ | |
2754 | msgin_set_wide(acb, srb); | |
2755 | break; | |
2756 | } | |
2757 | msgin_reject(acb, srb); | |
2758 | break; | |
2759 | ||
9c2d2670 | 2760 | case IGNORE_WIDE_RESIDUE: |
1da177e4 LT |
2761 | /* Discard wide residual */ |
2762 | dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n"); | |
2763 | break; | |
2764 | ||
2765 | case COMMAND_COMPLETE: | |
2766 | /* nothing has to be done */ | |
2767 | break; | |
2768 | ||
2769 | case SAVE_POINTERS: | |
2770 | /* | |
2771 | * SAVE POINTER may be ignored as we have the struct | |
2772 | * ScsiReqBlk* associated with the scsi command. | |
2773 | */ | |
5cd049a5 | 2774 | dprintkdbg(DBG_0, "msgin_phase0: (0x%p) " |
1da177e4 | 2775 | "SAVE POINTER rem=%i Ignore\n", |
5cd049a5 | 2776 | srb->cmd, srb->total_xfer_length); |
1da177e4 LT |
2777 | break; |
2778 | ||
2779 | case RESTORE_POINTERS: | |
2780 | dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n"); | |
2781 | break; | |
2782 | ||
2783 | case ABORT: | |
5cd049a5 | 2784 | dprintkdbg(DBG_0, "msgin_phase0: (0x%p) " |
1da177e4 | 2785 | "<%02i-%i> ABORT msg\n", |
5cd049a5 | 2786 | srb->cmd, dcb->target_id, |
1da177e4 LT |
2787 | dcb->target_lun); |
2788 | dcb->flag |= ABORT_DEV_; | |
2789 | enable_msgout_abort(acb, srb); | |
2790 | break; | |
2791 | ||
2792 | default: | |
2793 | /* reject unknown messages */ | |
2794 | if (srb->msgin_buf[0] & IDENTIFY_BASE) { | |
2795 | dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n"); | |
2796 | srb->msg_count = 1; | |
2797 | srb->msgout_buf[0] = dcb->identify_msg; | |
2798 | DC395x_ENABLE_MSGOUT; | |
2799 | srb->state |= SRB_MSGOUT; | |
2800 | /*break; */ | |
2801 | } | |
2802 | msgin_reject(acb, srb); | |
2803 | } | |
2804 | ||
2805 | /* Clear counter and MsgIn state */ | |
2806 | srb->state &= ~SRB_MSGIN; | |
2807 | acb->msg_len = 0; | |
2808 | } | |
2809 | *pscsi_status = PH_BUS_FREE; | |
2810 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */ | |
2811 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); | |
2812 | } | |
2813 | ||
2814 | ||
2815 | static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
2816 | u16 *pscsi_status) | |
2817 | { | |
5cd049a5 | 2818 | dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd); |
1da177e4 LT |
2819 | clear_fifo(acb, "msgin_phase1"); |
2820 | DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); | |
2821 | if (!(srb->state & SRB_MSGIN)) { | |
2822 | srb->state &= ~SRB_DISCONNECT; | |
2823 | srb->state |= SRB_MSGIN; | |
2824 | } | |
2825 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ | |
2826 | /* SCSI command */ | |
2827 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN); | |
2828 | } | |
2829 | ||
2830 | ||
2831 | static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
2832 | u16 *pscsi_status) | |
2833 | { | |
2834 | } | |
2835 | ||
2836 | ||
2837 | static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, | |
2838 | u16 *pscsi_status) | |
2839 | { | |
2840 | } | |
2841 | ||
2842 | ||
2843 | static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb) | |
2844 | { | |
2845 | struct DeviceCtlBlk *i; | |
2846 | ||
2847 | /* set all lun device's period, offset */ | |
2848 | if (dcb->identify_msg & 0x07) | |
2849 | return; | |
2850 | ||
2851 | if (acb->scan_devices) { | |
2852 | current_sync_offset = dcb->sync_offset; | |
2853 | return; | |
2854 | } | |
2855 | ||
2856 | list_for_each_entry(i, &acb->dcb_list, list) | |
2857 | if (i->target_id == dcb->target_id) { | |
2858 | i->sync_period = dcb->sync_period; | |
2859 | i->sync_offset = dcb->sync_offset; | |
2860 | i->sync_mode = dcb->sync_mode; | |
2861 | i->min_nego_period = dcb->min_nego_period; | |
2862 | } | |
2863 | } | |
2864 | ||
2865 | ||
2866 | static void disconnect(struct AdapterCtlBlk *acb) | |
2867 | { | |
2868 | struct DeviceCtlBlk *dcb = acb->active_dcb; | |
2869 | struct ScsiReqBlk *srb; | |
2870 | ||
2871 | if (!dcb) { | |
2872 | dprintkl(KERN_ERR, "disconnect: No such device\n"); | |
2873 | udelay(500); | |
2874 | /* Suspend queue for a while */ | |
53a8936c | 2875 | acb->last_reset = |
1da177e4 LT |
2876 | jiffies + HZ / 2 + |
2877 | HZ * acb->eeprom.delay_time; | |
2878 | clear_fifo(acb, "disconnectEx"); | |
2879 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); | |
2880 | return; | |
2881 | } | |
2882 | srb = dcb->active_srb; | |
2883 | acb->active_dcb = NULL; | |
5cd049a5 | 2884 | dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd); |
1da177e4 LT |
2885 | |
2886 | srb->scsi_phase = PH_BUS_FREE; /* initial phase */ | |
2887 | clear_fifo(acb, "disconnect"); | |
2888 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); | |
2889 | if (srb->state & SRB_UNEXPECT_RESEL) { | |
2890 | dprintkl(KERN_ERR, | |
2891 | "disconnect: Unexpected reselection <%02i-%i>\n", | |
2892 | dcb->target_id, dcb->target_lun); | |
2893 | srb->state = 0; | |
2894 | waiting_process_next(acb); | |
2895 | } else if (srb->state & SRB_ABORT_SENT) { | |
2896 | dcb->flag &= ~ABORT_DEV_; | |
53a8936c | 2897 | acb->last_reset = jiffies + HZ / 2 + 1; |
1da177e4 LT |
2898 | dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n"); |
2899 | doing_srb_done(acb, DID_ABORT, srb->cmd, 1); | |
2900 | waiting_process_next(acb); | |
2901 | } else { | |
2902 | if ((srb->state & (SRB_START_ + SRB_MSGOUT)) | |
2903 | || !(srb-> | |
973c9208 | 2904 | state & (SRB_DISCONNECT | SRB_COMPLETED))) { |
1da177e4 LT |
2905 | /* |
2906 | * Selection time out | |
2907 | * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED) | |
2908 | */ | |
2909 | /* Unexp. Disc / Sel Timeout */ | |
2910 | if (srb->state != SRB_START_ | |
2911 | && srb->state != SRB_MSGOUT) { | |
2912 | srb->state = SRB_READY; | |
2913 | dprintkl(KERN_DEBUG, | |
5cd049a5 CH |
2914 | "disconnect: (0x%p) Unexpected\n", |
2915 | srb->cmd); | |
1da177e4 LT |
2916 | srb->target_status = SCSI_STAT_SEL_TIMEOUT; |
2917 | goto disc1; | |
2918 | } else { | |
2919 | /* Normal selection timeout */ | |
5cd049a5 CH |
2920 | dprintkdbg(DBG_KG, "disconnect: (0x%p) " |
2921 | "<%02i-%i> SelTO\n", srb->cmd, | |
1da177e4 LT |
2922 | dcb->target_id, dcb->target_lun); |
2923 | if (srb->retry_count++ > DC395x_MAX_RETRIES | |
2924 | || acb->scan_devices) { | |
2925 | srb->target_status = | |
2926 | SCSI_STAT_SEL_TIMEOUT; | |
2927 | goto disc1; | |
2928 | } | |
2929 | free_tag(dcb, srb); | |
cd29660d | 2930 | list_move(&srb->list, &dcb->srb_waiting_list); |
1da177e4 | 2931 | dprintkdbg(DBG_KG, |
5cd049a5 CH |
2932 | "disconnect: (0x%p) Retry\n", |
2933 | srb->cmd); | |
1da177e4 LT |
2934 | waiting_set_timer(acb, HZ / 20); |
2935 | } | |
2936 | } else if (srb->state & SRB_DISCONNECT) { | |
2937 | u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); | |
2938 | /* | |
2939 | * SRB_DISCONNECT (This is what we expect!) | |
2940 | */ | |
2941 | if (bval & 0x40) { | |
2942 | dprintkdbg(DBG_0, "disconnect: SCSI bus stat " | |
2943 | " 0x%02x: ACK set! Other controllers?\n", | |
2944 | bval); | |
2945 | /* It could come from another initiator, therefore don't do much ! */ | |
2946 | } else | |
2947 | waiting_process_next(acb); | |
2948 | } else if (srb->state & SRB_COMPLETED) { | |
2949 | disc1: | |
2950 | /* | |
2951 | ** SRB_COMPLETED | |
2952 | */ | |
2953 | free_tag(dcb, srb); | |
2954 | dcb->active_srb = NULL; | |
2955 | srb->state = SRB_FREE; | |
2956 | srb_done(acb, dcb, srb); | |
2957 | } | |
2958 | } | |
2959 | } | |
2960 | ||
2961 | ||
2962 | static void reselect(struct AdapterCtlBlk *acb) | |
2963 | { | |
2964 | struct DeviceCtlBlk *dcb = acb->active_dcb; | |
2965 | struct ScsiReqBlk *srb = NULL; | |
2966 | u16 rsel_tar_lun_id; | |
2967 | u8 id, lun; | |
1da177e4 LT |
2968 | dprintkdbg(DBG_0, "reselect: acb=%p\n", acb); |
2969 | ||
2970 | clear_fifo(acb, "reselect"); | |
2971 | /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */ | |
2972 | /* Read Reselected Target ID and LUN */ | |
2973 | rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID); | |
2974 | if (dcb) { /* Arbitration lost but Reselection win */ | |
2975 | srb = dcb->active_srb; | |
2976 | if (!srb) { | |
2977 | dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, " | |
2978 | "but active_srb == NULL\n"); | |
2979 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ | |
2980 | return; | |
2981 | } | |
2982 | /* Why the if ? */ | |
2983 | if (!acb->scan_devices) { | |
5cd049a5 | 2984 | dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> " |
1da177e4 | 2985 | "Arb lost but Resel win rsel=%i stat=0x%04x\n", |
5cd049a5 | 2986 | srb->cmd, dcb->target_id, |
1da177e4 LT |
2987 | dcb->target_lun, rsel_tar_lun_id, |
2988 | DC395x_read16(acb, TRM_S1040_SCSI_STATUS)); | |
1da177e4 LT |
2989 | /*srb->state |= SRB_DISCONNECT; */ |
2990 | ||
2991 | srb->state = SRB_READY; | |
2992 | free_tag(dcb, srb); | |
cd29660d | 2993 | list_move(&srb->list, &dcb->srb_waiting_list); |
1da177e4 LT |
2994 | waiting_set_timer(acb, HZ / 20); |
2995 | ||
2996 | /* return; */ | |
2997 | } | |
2998 | } | |
2999 | /* Read Reselected Target Id and LUN */ | |
3000 | if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8))) | |
3001 | dprintkl(KERN_DEBUG, "reselect: Expects identify msg. " | |
3002 | "Got %i!\n", rsel_tar_lun_id); | |
3003 | id = rsel_tar_lun_id & 0xff; | |
3004 | lun = (rsel_tar_lun_id >> 8) & 7; | |
3005 | dcb = find_dcb(acb, id, lun); | |
3006 | if (!dcb) { | |
3007 | dprintkl(KERN_ERR, "reselect: From non existent device " | |
3008 | "<%02i-%i>\n", id, lun); | |
3009 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ | |
3010 | return; | |
3011 | } | |
3012 | acb->active_dcb = dcb; | |
3013 | ||
3014 | if (!(dcb->dev_mode & NTC_DO_DISCONNECT)) | |
3015 | dprintkl(KERN_DEBUG, "reselect: in spite of forbidden " | |
3016 | "disconnection? <%02i-%i>\n", | |
3017 | dcb->target_id, dcb->target_lun); | |
3018 | ||
67056d90 | 3019 | if (dcb->sync_mode & EN_TAG_QUEUEING) { |
1da177e4 LT |
3020 | srb = acb->tmp_srb; |
3021 | dcb->active_srb = srb; | |
3022 | } else { | |
3023 | /* There can be only one! */ | |
3024 | srb = dcb->active_srb; | |
3025 | if (!srb || !(srb->state & SRB_DISCONNECT)) { | |
3026 | /* | |
3027 | * abort command | |
3028 | */ | |
3029 | dprintkl(KERN_DEBUG, | |
3030 | "reselect: w/o disconnected cmds <%02i-%i>\n", | |
3031 | dcb->target_id, dcb->target_lun); | |
3032 | srb = acb->tmp_srb; | |
3033 | srb->state = SRB_UNEXPECT_RESEL; | |
3034 | dcb->active_srb = srb; | |
3035 | enable_msgout_abort(acb, srb); | |
3036 | } else { | |
3037 | if (dcb->flag & ABORT_DEV_) { | |
3038 | /*srb->state = SRB_ABORT_SENT; */ | |
3039 | enable_msgout_abort(acb, srb); | |
3040 | } else | |
3041 | srb->state = SRB_DATA_XFER; | |
3042 | ||
3043 | } | |
3044 | } | |
3045 | srb->scsi_phase = PH_BUS_FREE; /* initial phase */ | |
3046 | ||
3047 | /* Program HA ID, target ID, period and offset */ | |
3048 | dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id); | |
3049 | DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */ | |
3050 | DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */ | |
3051 | DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */ | |
3052 | DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */ | |
3053 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ | |
3054 | /* SCSI command */ | |
3055 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); | |
3056 | } | |
3057 | ||
3058 | ||
3059 | static inline u8 tagq_blacklist(char *name) | |
3060 | { | |
3061 | #ifndef DC395x_NO_TAGQ | |
3062 | #if 0 | |
3063 | u8 i; | |
3064 | for (i = 0; i < BADDEVCNT; i++) | |
3065 | if (memcmp(name, DC395x_baddevname1[i], 28) == 0) | |
3066 | return 1; | |
3067 | #endif | |
3068 | return 0; | |
3069 | #else | |
3070 | return 1; | |
3071 | #endif | |
3072 | } | |
3073 | ||
3074 | ||
3075 | static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr) | |
3076 | { | |
3077 | /* Check for SCSI format (ANSI and Response data format) */ | |
3078 | if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) { | |
3079 | if ((ptr->Flags & SCSI_INQ_CMDQUEUE) | |
3080 | && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) && | |
3081 | /*(dcb->dev_mode & NTC_DO_DISCONNECT) */ | |
3082 | /* ((dcb->dev_type == TYPE_DISK) | |
3083 | || (dcb->dev_type == TYPE_MOD)) && */ | |
3084 | !tagq_blacklist(((char *)ptr) + 8)) { | |
3085 | if (dcb->max_command == 1) | |
3086 | dcb->max_command = | |
3087 | dcb->acb->tag_max_num; | |
3088 | dcb->sync_mode |= EN_TAG_QUEUEING; | |
3089 | /*dcb->tag_mask = 0; */ | |
3090 | } else | |
3091 | dcb->max_command = 1; | |
3092 | } | |
3093 | } | |
3094 | ||
3095 | ||
3096 | static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, | |
3097 | struct ScsiInqData *ptr) | |
3098 | { | |
3099 | u8 bval1 = ptr->DevType & SCSI_DEVTYPE; | |
3100 | dcb->dev_type = bval1; | |
3101 | /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */ | |
3102 | disc_tagq_set(dcb, ptr); | |
3103 | } | |
3104 | ||
3105 | ||
3106 | /* unmap mapped pci regions from SRB */ | |
3107 | static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) | |
3108 | { | |
3109 | struct scsi_cmnd *cmd = srb->cmd; | |
3110 | enum dma_data_direction dir = cmd->sc_data_direction; | |
a862ea31 | 3111 | |
ece0eeff | 3112 | if (scsi_sg_count(cmd) && dir != DMA_NONE) { |
1da177e4 LT |
3113 | /* unmap DC395x SG list */ |
3114 | dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n", | |
3115 | srb->sg_bus_addr, SEGMENTX_LEN); | |
dfda5e21 CH |
3116 | dma_unmap_single(&acb->dev->dev, srb->sg_bus_addr, SEGMENTX_LEN, |
3117 | DMA_TO_DEVICE); | |
1da177e4 | 3118 | dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n", |
a862ea31 | 3119 | scsi_sg_count(cmd), scsi_bufflen(cmd)); |
1da177e4 | 3120 | /* unmap the sg segments */ |
a862ea31 | 3121 | scsi_dma_unmap(cmd); |
1da177e4 LT |
3122 | } |
3123 | } | |
3124 | ||
3125 | ||
3126 | /* unmap mapped pci sense buffer from SRB */ | |
3127 | static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, | |
3128 | struct ScsiReqBlk *srb) | |
3129 | { | |
3130 | if (!(srb->flag & AUTO_REQSENSE)) | |
3131 | return; | |
3132 | /* Unmap sense buffer */ | |
3133 | dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n", | |
3134 | srb->segment_x[0].address); | |
dfda5e21 CH |
3135 | dma_unmap_single(&acb->dev->dev, srb->segment_x[0].address, |
3136 | srb->segment_x[0].length, DMA_FROM_DEVICE); | |
1da177e4 LT |
3137 | /* Restore SG stuff */ |
3138 | srb->total_xfer_length = srb->xferred; | |
3139 | srb->segment_x[0].address = | |
3140 | srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address; | |
3141 | srb->segment_x[0].length = | |
3142 | srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length; | |
3143 | } | |
3144 | ||
3145 | ||
3146 | /* | |
3147 | * Complete execution of a SCSI command | |
3148 | * Signal completion to the generic SCSI driver | |
3149 | */ | |
3150 | static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, | |
3151 | struct ScsiReqBlk *srb) | |
3152 | { | |
3153 | u8 tempcnt, status; | |
3154 | struct scsi_cmnd *cmd = srb->cmd; | |
1da177e4 | 3155 | enum dma_data_direction dir = cmd->sc_data_direction; |
9dc399de | 3156 | int ckc_only = 1; |
1da177e4 | 3157 | |
5cd049a5 | 3158 | dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd, |
9cb78c16 | 3159 | srb->cmd->device->id, (u8)srb->cmd->device->lun); |
9dc399de | 3160 | dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n", |
a862ea31 FT |
3161 | srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count, |
3162 | scsi_sgtalbe(cmd)); | |
1da177e4 | 3163 | status = srb->target_status; |
75dd4439 HR |
3164 | set_host_byte(cmd, DID_OK); |
3165 | set_status_byte(cmd, SAM_STAT_GOOD); | |
1da177e4 LT |
3166 | if (srb->flag & AUTO_REQSENSE) { |
3167 | dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n"); | |
3168 | pci_unmap_srb_sense(acb, srb); | |
3169 | /* | |
3170 | ** target status.......................... | |
3171 | */ | |
3172 | srb->flag &= ~AUTO_REQSENSE; | |
3173 | srb->adapter_status = 0; | |
75dd4439 | 3174 | srb->target_status = SAM_STAT_CHECK_CONDITION; |
1da177e4 LT |
3175 | if (debug_enabled(DBG_1)) { |
3176 | switch (cmd->sense_buffer[2] & 0x0f) { | |
3177 | case NOT_READY: | |
3178 | dprintkl(KERN_DEBUG, | |
3179 | "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", | |
3180 | cmd->cmnd[0], dcb->target_id, | |
3181 | dcb->target_lun, status, acb->scan_devices); | |
3182 | break; | |
3183 | case UNIT_ATTENTION: | |
3184 | dprintkl(KERN_DEBUG, | |
3185 | "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", | |
3186 | cmd->cmnd[0], dcb->target_id, | |
3187 | dcb->target_lun, status, acb->scan_devices); | |
3188 | break; | |
3189 | case ILLEGAL_REQUEST: | |
3190 | dprintkl(KERN_DEBUG, | |
3191 | "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", | |
3192 | cmd->cmnd[0], dcb->target_id, | |
3193 | dcb->target_lun, status, acb->scan_devices); | |
3194 | break; | |
3195 | case MEDIUM_ERROR: | |
3196 | dprintkl(KERN_DEBUG, | |
3197 | "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", | |
3198 | cmd->cmnd[0], dcb->target_id, | |
3199 | dcb->target_lun, status, acb->scan_devices); | |
3200 | break; | |
3201 | case HARDWARE_ERROR: | |
3202 | dprintkl(KERN_DEBUG, | |
3203 | "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", | |
3204 | cmd->cmnd[0], dcb->target_id, | |
3205 | dcb->target_lun, status, acb->scan_devices); | |
3206 | break; | |
3207 | } | |
3208 | if (cmd->sense_buffer[7] >= 6) | |
3209 | printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x " | |
3210 | "(0x%08x 0x%08x)\n", | |
3211 | cmd->sense_buffer[2], cmd->sense_buffer[12], | |
3212 | cmd->sense_buffer[13], | |
3213 | *((unsigned int *)(cmd->sense_buffer + 3)), | |
3214 | *((unsigned int *)(cmd->sense_buffer + 8))); | |
3215 | else | |
3216 | printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n", | |
3217 | cmd->sense_buffer[2], | |
3218 | *((unsigned int *)(cmd->sense_buffer + 3))); | |
3219 | } | |
3220 | ||
75dd4439 HR |
3221 | if (status == SAM_STAT_CHECK_CONDITION) { |
3222 | set_host_byte(cmd, DID_BAD_TARGET); | |
1da177e4 LT |
3223 | goto ckc_e; |
3224 | } | |
3225 | dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n"); | |
3226 | ||
75dd4439 | 3227 | set_status_byte(cmd, SAM_STAT_CHECK_CONDITION); |
1da177e4 LT |
3228 | |
3229 | goto ckc_e; | |
3230 | } | |
3231 | ||
3232 | /*************************************************************/ | |
3233 | if (status) { | |
3234 | /* | |
3235 | * target status.......................... | |
3236 | */ | |
75dd4439 | 3237 | if (status == SAM_STAT_CHECK_CONDITION) { |
1da177e4 LT |
3238 | request_sense(acb, dcb, srb); |
3239 | return; | |
75dd4439 | 3240 | } else if (status == SAM_STAT_TASK_SET_FULL) { |
1da177e4 LT |
3241 | tempcnt = (u8)list_size(&dcb->srb_going_list); |
3242 | dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n", | |
3243 | dcb->target_id, dcb->target_lun, tempcnt); | |
3244 | if (tempcnt > 1) | |
3245 | tempcnt--; | |
3246 | dcb->max_command = tempcnt; | |
3247 | free_tag(dcb, srb); | |
cd29660d | 3248 | list_move(&srb->list, &dcb->srb_waiting_list); |
1da177e4 LT |
3249 | waiting_set_timer(acb, HZ / 20); |
3250 | srb->adapter_status = 0; | |
3251 | srb->target_status = 0; | |
3252 | return; | |
3253 | } else if (status == SCSI_STAT_SEL_TIMEOUT) { | |
3254 | srb->adapter_status = H_SEL_TIMEOUT; | |
3255 | srb->target_status = 0; | |
75dd4439 | 3256 | set_host_byte(cmd, DID_NO_CONNECT); |
1da177e4 LT |
3257 | } else { |
3258 | srb->adapter_status = 0; | |
75dd4439 | 3259 | set_host_byte(cmd, DID_ERROR); |
75dd4439 | 3260 | set_status_byte(cmd, status); |
1da177e4 LT |
3261 | } |
3262 | } else { | |
3263 | /* | |
3264 | ** process initiator status.......................... | |
3265 | */ | |
3266 | status = srb->adapter_status; | |
3267 | if (status & H_OVER_UNDER_RUN) { | |
3268 | srb->target_status = 0; | |
5bfaafb6 | 3269 | scsi_msg_to_host_byte(cmd, srb->end_message); |
1da177e4 | 3270 | } else if (srb->status & PARITY_ERROR) { |
75dd4439 | 3271 | set_host_byte(cmd, DID_PARITY); |
1da177e4 LT |
3272 | } else { /* No error */ |
3273 | ||
3274 | srb->adapter_status = 0; | |
3275 | srb->target_status = 0; | |
1da177e4 LT |
3276 | } |
3277 | } | |
3278 | ||
9dc399de | 3279 | ckc_only = 0; |
1da177e4 LT |
3280 | /* Check Error Conditions */ |
3281 | ckc_e: | |
3282 | ||
3a5bd702 CH |
3283 | pci_unmap_srb(acb, srb); |
3284 | ||
9dc399de GL |
3285 | if (cmd->cmnd[0] == INQUIRY) { |
3286 | unsigned char *base = NULL; | |
3287 | struct ScsiInqData *ptr; | |
3288 | unsigned long flags = 0; | |
a862ea31 FT |
3289 | struct scatterlist* sg = scsi_sglist(cmd); |
3290 | size_t offset = 0, len = sizeof(struct ScsiInqData); | |
9dc399de | 3291 | |
a862ea31 FT |
3292 | local_irq_save(flags); |
3293 | base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len); | |
3294 | ptr = (struct ScsiInqData *)(base + offset); | |
9dc399de | 3295 | |
75dd4439 | 3296 | if (!ckc_only && get_host_byte(cmd) == DID_OK |
a862ea31 | 3297 | && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8 |
ece0eeff | 3298 | && dir != DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2) |
9dc399de GL |
3299 | dcb->inquiry7 = ptr->Flags; |
3300 | ||
1da177e4 LT |
3301 | /*if( srb->cmd->cmnd[0] == INQUIRY && */ |
3302 | /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */ | |
75dd4439 HR |
3303 | if ((get_host_byte(cmd) == DID_OK) || |
3304 | (get_status_byte(cmd) == SAM_STAT_CHECK_CONDITION)) { | |
9dc399de GL |
3305 | if (!dcb->init_tcq_flag) { |
3306 | add_dev(acb, dcb, ptr); | |
3307 | dcb->init_tcq_flag = 1; | |
3308 | } | |
1da177e4 LT |
3309 | } |
3310 | ||
a862ea31 FT |
3311 | scsi_kunmap_atomic_sg(base); |
3312 | local_irq_restore(flags); | |
1da177e4 LT |
3313 | } |
3314 | ||
1da177e4 | 3315 | /* Here is the info for Doug Gilbert's sg3 ... */ |
a862ea31 | 3316 | scsi_set_resid(cmd, srb->total_xfer_length); |
1da177e4 LT |
3317 | if (debug_enabled(DBG_KG)) { |
3318 | if (srb->total_xfer_length) | |
5cd049a5 | 3319 | dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> " |
1da177e4 | 3320 | "cmnd=0x%02x Missed %i bytes\n", |
9cb78c16 | 3321 | cmd, cmd->device->id, (u8)cmd->device->lun, |
1da177e4 LT |
3322 | cmd->cmnd[0], srb->total_xfer_length); |
3323 | } | |
3324 | ||
cd29660d CH |
3325 | if (srb != acb->tmp_srb) { |
3326 | /* Add to free list */ | |
5cd049a5 | 3327 | dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n", |
75dd4439 | 3328 | cmd, cmd->result); |
cd29660d CH |
3329 | list_move_tail(&srb->list, &acb->srb_free_list); |
3330 | } else { | |
3331 | dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n"); | |
1da177e4 | 3332 | } |
1da177e4 | 3333 | |
6c365b88 | 3334 | scsi_done(cmd); |
1da177e4 LT |
3335 | waiting_process_next(acb); |
3336 | } | |
3337 | ||
3338 | ||
3339 | /* abort all cmds in our queues */ | |
3340 | static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag, | |
3341 | struct scsi_cmnd *cmd, u8 force) | |
3342 | { | |
3343 | struct DeviceCtlBlk *dcb; | |
3344 | dprintkl(KERN_INFO, "doing_srb_done: pids "); | |
3345 | ||
3346 | list_for_each_entry(dcb, &acb->dcb_list, list) { | |
3347 | struct ScsiReqBlk *srb; | |
3348 | struct ScsiReqBlk *tmp; | |
3349 | struct scsi_cmnd *p; | |
3350 | ||
3351 | list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) { | |
1da177e4 | 3352 | p = srb->cmd; |
5cd049a5 | 3353 | printk("G:%p(%02i-%i) ", p, |
9cb78c16 | 3354 | p->device->id, (u8)p->device->lun); |
cd29660d | 3355 | list_del(&srb->list); |
1da177e4 | 3356 | free_tag(dcb, srb); |
cd29660d | 3357 | list_add_tail(&srb->list, &acb->srb_free_list); |
75dd4439 HR |
3358 | set_host_byte(p, did_flag); |
3359 | set_status_byte(p, SAM_STAT_GOOD); | |
1da177e4 LT |
3360 | pci_unmap_srb_sense(acb, srb); |
3361 | pci_unmap_srb(acb, srb); | |
3362 | if (force) { | |
3363 | /* For new EH, we normally don't need to give commands back, | |
3364 | * as they all complete or all time out */ | |
6c365b88 | 3365 | scsi_done(p); |
1da177e4 LT |
3366 | } |
3367 | } | |
3368 | if (!list_empty(&dcb->srb_going_list)) | |
3369 | dprintkl(KERN_DEBUG, | |
3370 | "How could the ML send cmnds to the Going queue? <%02i-%i>\n", | |
3371 | dcb->target_id, dcb->target_lun); | |
3372 | if (dcb->tag_mask) | |
3373 | dprintkl(KERN_DEBUG, | |
3374 | "tag_mask for <%02i-%i> should be empty, is %08x!\n", | |
3375 | dcb->target_id, dcb->target_lun, | |
3376 | dcb->tag_mask); | |
3377 | ||
3378 | /* Waiting queue */ | |
3379 | list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) { | |
1da177e4 LT |
3380 | p = srb->cmd; |
3381 | ||
5cd049a5 | 3382 | printk("W:%p<%02i-%i>", p, p->device->id, |
9cb78c16 | 3383 | (u8)p->device->lun); |
cd29660d | 3384 | list_move_tail(&srb->list, &acb->srb_free_list); |
75dd4439 HR |
3385 | set_host_byte(p, did_flag); |
3386 | set_status_byte(p, SAM_STAT_GOOD); | |
1da177e4 LT |
3387 | pci_unmap_srb_sense(acb, srb); |
3388 | pci_unmap_srb(acb, srb); | |
3389 | if (force) { | |
3390 | /* For new EH, we normally don't need to give commands back, | |
3391 | * as they all complete or all time out */ | |
6c365b88 | 3392 | scsi_done(cmd); |
1da177e4 LT |
3393 | } |
3394 | } | |
3395 | if (!list_empty(&dcb->srb_waiting_list)) | |
3396 | dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n", | |
3397 | list_size(&dcb->srb_waiting_list), dcb->target_id, | |
3398 | dcb->target_lun); | |
3399 | dcb->flag &= ~ABORT_DEV_; | |
3400 | } | |
3401 | printk("\n"); | |
3402 | } | |
3403 | ||
3404 | ||
3405 | static void reset_scsi_bus(struct AdapterCtlBlk *acb) | |
3406 | { | |
3407 | dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb); | |
3408 | acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */ | |
3409 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); | |
3410 | ||
3411 | while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET)) | |
3412 | /* nothing */; | |
3413 | } | |
3414 | ||
3415 | ||
3416 | static void set_basic_config(struct AdapterCtlBlk *acb) | |
3417 | { | |
3418 | u8 bval; | |
3419 | u16 wval; | |
3420 | DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout); | |
3421 | if (acb->config & HCC_PARITY) | |
3422 | bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK; | |
3423 | else | |
3424 | bval = PHASELATCH | INITIATOR | BLOCKRST; | |
3425 | ||
3426 | DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval); | |
3427 | ||
3428 | /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */ | |
3429 | DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */ | |
3430 | /* program Host ID */ | |
3431 | DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); | |
3432 | /* set ansynchronous transfer */ | |
3433 | DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00); | |
3434 | /* Turn LED control off */ | |
3435 | wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F; | |
3436 | DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval); | |
3437 | /* DMA config */ | |
3438 | wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL; | |
3439 | wval |= | |
3440 | DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ; | |
3441 | DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval); | |
3442 | /* Clear pending interrupt status */ | |
3443 | DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); | |
3444 | /* Enable SCSI interrupt */ | |
3445 | DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F); | |
3446 | DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR | |
3447 | /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */ | |
3448 | ); | |
3449 | } | |
3450 | ||
3451 | ||
3452 | static void scsi_reset_detect(struct AdapterCtlBlk *acb) | |
3453 | { | |
3454 | dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb); | |
3455 | /* delay half a second */ | |
3456 | if (timer_pending(&acb->waiting_timer)) | |
3457 | del_timer(&acb->waiting_timer); | |
3458 | ||
3459 | DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); | |
3460 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); | |
3461 | /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */ | |
3462 | udelay(500); | |
3463 | /* Maybe we locked up the bus? Then lets wait even longer ... */ | |
53a8936c | 3464 | acb->last_reset = |
1da177e4 LT |
3465 | jiffies + 5 * HZ / 2 + |
3466 | HZ * acb->eeprom.delay_time; | |
3467 | ||
3468 | clear_fifo(acb, "scsi_reset_detect"); | |
3469 | set_basic_config(acb); | |
3470 | /*1.25 */ | |
3471 | /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */ | |
3472 | ||
3473 | if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */ | |
3474 | acb->acb_flag |= RESET_DONE; | |
3475 | } else { | |
3476 | acb->acb_flag |= RESET_DETECT; | |
3477 | reset_dev_param(acb); | |
3478 | doing_srb_done(acb, DID_RESET, NULL, 1); | |
3479 | /*DC395x_RecoverSRB( acb ); */ | |
3480 | acb->active_dcb = NULL; | |
3481 | acb->acb_flag = 0; | |
3482 | waiting_process_next(acb); | |
3483 | } | |
3484 | } | |
3485 | ||
3486 | ||
3487 | static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, | |
3488 | struct ScsiReqBlk *srb) | |
3489 | { | |
3490 | struct scsi_cmnd *cmd = srb->cmd; | |
5cd049a5 | 3491 | dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n", |
9cb78c16 | 3492 | cmd, cmd->device->id, (u8)cmd->device->lun); |
1da177e4 LT |
3493 | |
3494 | srb->flag |= AUTO_REQSENSE; | |
3495 | srb->adapter_status = 0; | |
3496 | srb->target_status = 0; | |
3497 | ||
3498 | /* KG: Can this prevent crap sense data ? */ | |
b80ca4f7 | 3499 | memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
1da177e4 LT |
3500 | |
3501 | /* Save some data */ | |
3502 | srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address = | |
3503 | srb->segment_x[0].address; | |
3504 | srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length = | |
3505 | srb->segment_x[0].length; | |
3506 | srb->xferred = srb->total_xfer_length; | |
3507 | /* srb->segment_x : a one entry of S/G list table */ | |
b80ca4f7 FT |
3508 | srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE; |
3509 | srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE; | |
1da177e4 | 3510 | /* Map sense buffer */ |
dfda5e21 CH |
3511 | srb->segment_x[0].address = dma_map_single(&acb->dev->dev, |
3512 | cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, | |
3513 | DMA_FROM_DEVICE); | |
1da177e4 LT |
3514 | dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n", |
3515 | cmd->sense_buffer, srb->segment_x[0].address, | |
b80ca4f7 | 3516 | SCSI_SENSE_BUFFERSIZE); |
1da177e4 LT |
3517 | srb->sg_count = 1; |
3518 | srb->sg_index = 0; | |
3519 | ||
3520 | if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */ | |
3521 | dprintkl(KERN_DEBUG, | |
5cd049a5 CH |
3522 | "request_sense: (0x%p) failed <%02i-%i>\n", |
3523 | srb->cmd, dcb->target_id, dcb->target_lun); | |
cd29660d | 3524 | list_move(&srb->list, &dcb->srb_waiting_list); |
1da177e4 LT |
3525 | waiting_set_timer(acb, HZ / 100); |
3526 | } | |
3527 | } | |
3528 | ||
3529 | ||
3530 | /** | |
3531 | * device_alloc - Allocate a new device instance. This create the | |
3532 | * devices instance and sets up all the data items. The adapter | |
3533 | * instance is required to obtain confiuration information for this | |
3534 | * device. This does *not* add this device to the adapters device | |
3535 | * list. | |
3536 | * | |
3537 | * @acb: The adapter to obtain configuration information from. | |
3538 | * @target: The target for the new device. | |
3539 | * @lun: The lun for the new device. | |
3540 | * | |
d6e05edc | 3541 | * Return the new device if successful or NULL on failure. |
1da177e4 LT |
3542 | **/ |
3543 | static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb, | |
3544 | u8 target, u8 lun) | |
3545 | { | |
3546 | struct NvRamType *eeprom = &acb->eeprom; | |
3547 | u8 period_index = eeprom->target[target].period & 0x07; | |
3548 | struct DeviceCtlBlk *dcb; | |
3549 | ||
3550 | dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC); | |
3551 | dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun); | |
3552 | if (!dcb) | |
3553 | return NULL; | |
3554 | dcb->acb = NULL; | |
3555 | INIT_LIST_HEAD(&dcb->srb_going_list); | |
3556 | INIT_LIST_HEAD(&dcb->srb_waiting_list); | |
3557 | dcb->active_srb = NULL; | |
3558 | dcb->tag_mask = 0; | |
3559 | dcb->max_command = 1; | |
3560 | dcb->target_id = target; | |
3561 | dcb->target_lun = lun; | |
208afec4 | 3562 | dcb->dev_mode = eeprom->target[target].cfg0; |
1da177e4 LT |
3563 | #ifndef DC395x_NO_DISCONNECT |
3564 | dcb->identify_msg = | |
3565 | IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun); | |
3566 | #else | |
3567 | dcb->identify_msg = IDENTIFY(0, lun); | |
3568 | #endif | |
1da177e4 LT |
3569 | dcb->inquiry7 = 0; |
3570 | dcb->sync_mode = 0; | |
3571 | dcb->min_nego_period = clock_period[period_index]; | |
3572 | dcb->sync_period = 0; | |
3573 | dcb->sync_offset = 0; | |
3574 | dcb->flag = 0; | |
3575 | ||
3576 | #ifndef DC395x_NO_WIDE | |
3577 | if ((dcb->dev_mode & NTC_DO_WIDE_NEGO) | |
3578 | && (acb->config & HCC_WIDE_CARD)) | |
3579 | dcb->sync_mode |= WIDE_NEGO_ENABLE; | |
3580 | #endif | |
3581 | #ifndef DC395x_NO_SYNC | |
3582 | if (dcb->dev_mode & NTC_DO_SYNC_NEGO) | |
3583 | if (!(lun) || current_sync_offset) | |
3584 | dcb->sync_mode |= SYNC_NEGO_ENABLE; | |
3585 | #endif | |
3586 | if (dcb->target_lun != 0) { | |
3587 | /* Copy settings */ | |
036a45aa XT |
3588 | struct DeviceCtlBlk *p = NULL, *iter; |
3589 | ||
3590 | list_for_each_entry(iter, &acb->dcb_list, list) | |
3591 | if (iter->target_id == dcb->target_id) { | |
3592 | p = iter; | |
1da177e4 | 3593 | break; |
036a45aa XT |
3594 | } |
3595 | ||
3596 | if (!p) { | |
3597 | kfree(dcb); | |
3598 | return NULL; | |
3599 | } | |
3600 | ||
1da177e4 LT |
3601 | dprintkdbg(DBG_1, |
3602 | "device_alloc: <%02i-%i> copy from <%02i-%i>\n", | |
3603 | dcb->target_id, dcb->target_lun, | |
3604 | p->target_id, p->target_lun); | |
3605 | dcb->sync_mode = p->sync_mode; | |
3606 | dcb->sync_period = p->sync_period; | |
3607 | dcb->min_nego_period = p->min_nego_period; | |
3608 | dcb->sync_offset = p->sync_offset; | |
3609 | dcb->inquiry7 = p->inquiry7; | |
3610 | } | |
3611 | return dcb; | |
3612 | } | |
3613 | ||
3614 | ||
3615 | /** | |
3616 | * adapter_add_device - Adds the device instance to the adaptor instance. | |
3617 | * | |
3618 | * @acb: The adapter device to be updated | |
b595076a | 3619 | * @dcb: A newly created and initialised device instance to add. |
1da177e4 LT |
3620 | **/ |
3621 | static void adapter_add_device(struct AdapterCtlBlk *acb, | |
3622 | struct DeviceCtlBlk *dcb) | |
3623 | { | |
3624 | /* backpointer to adapter */ | |
3625 | dcb->acb = acb; | |
3626 | ||
3627 | /* set run_robin to this device if it is currently empty */ | |
3628 | if (list_empty(&acb->dcb_list)) | |
3629 | acb->dcb_run_robin = dcb; | |
3630 | ||
3631 | /* add device to list */ | |
3632 | list_add_tail(&dcb->list, &acb->dcb_list); | |
3633 | ||
3634 | /* update device maps */ | |
3635 | acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun); | |
3636 | acb->children[dcb->target_id][dcb->target_lun] = dcb; | |
3637 | } | |
3638 | ||
3639 | ||
3640 | /** | |
3641 | * adapter_remove_device - Removes the device instance from the adaptor | |
3642 | * instance. The device instance is not check in any way or freed by this. | |
3643 | * The caller is expected to take care of that. This will simply remove the | |
3644 | * device from the adapters data strcutures. | |
3645 | * | |
3646 | * @acb: The adapter device to be updated | |
3647 | * @dcb: A device that has previously been added to the adapter. | |
3648 | **/ | |
3649 | static void adapter_remove_device(struct AdapterCtlBlk *acb, | |
3650 | struct DeviceCtlBlk *dcb) | |
3651 | { | |
3652 | struct DeviceCtlBlk *i; | |
3653 | struct DeviceCtlBlk *tmp; | |
3654 | dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n", | |
3655 | dcb->target_id, dcb->target_lun); | |
3656 | ||
3657 | /* fix up any pointers to this device that we have in the adapter */ | |
3658 | if (acb->active_dcb == dcb) | |
3659 | acb->active_dcb = NULL; | |
3660 | if (acb->dcb_run_robin == dcb) | |
3661 | acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb); | |
3662 | ||
3663 | /* unlink from list */ | |
3664 | list_for_each_entry_safe(i, tmp, &acb->dcb_list, list) | |
3665 | if (dcb == i) { | |
3666 | list_del(&i->list); | |
3667 | break; | |
3668 | } | |
3669 | ||
3670 | /* clear map and children */ | |
3671 | acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun); | |
3672 | acb->children[dcb->target_id][dcb->target_lun] = NULL; | |
3673 | dcb->acb = NULL; | |
3674 | } | |
3675 | ||
3676 | ||
3677 | /** | |
3678 | * adapter_remove_and_free_device - Removes a single device from the adapter | |
3679 | * and then frees the device information. | |
3680 | * | |
3681 | * @acb: The adapter device to be updated | |
3682 | * @dcb: A device that has previously been added to the adapter. | |
3683 | */ | |
3684 | static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb, | |
3685 | struct DeviceCtlBlk *dcb) | |
3686 | { | |
3687 | if (list_size(&dcb->srb_going_list) > 1) { | |
3688 | dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> " | |
3689 | "Won't remove because of %i active requests.\n", | |
3690 | dcb->target_id, dcb->target_lun, | |
3691 | list_size(&dcb->srb_going_list)); | |
3692 | return; | |
3693 | } | |
3694 | adapter_remove_device(acb, dcb); | |
3695 | kfree(dcb); | |
3696 | } | |
3697 | ||
3698 | ||
3699 | /** | |
3700 | * adapter_remove_and_free_all_devices - Removes and frees all of the | |
3701 | * devices associated with the specified adapter. | |
3702 | * | |
3703 | * @acb: The adapter from which all devices should be removed. | |
3704 | **/ | |
3705 | static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb) | |
3706 | { | |
3707 | struct DeviceCtlBlk *dcb; | |
3708 | struct DeviceCtlBlk *tmp; | |
3709 | dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n", | |
3710 | list_size(&acb->dcb_list)); | |
3711 | ||
3712 | list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list) | |
3713 | adapter_remove_and_free_device(acb, dcb); | |
3714 | } | |
3715 | ||
3716 | ||
3717 | /** | |
3718 | * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new | |
3719 | * scsi device that we need to deal with. We allocate a new device and then | |
3720 | * insert that device into the adapters device list. | |
3721 | * | |
3722 | * @scsi_device: The new scsi device that we need to handle. | |
3723 | **/ | |
3724 | static int dc395x_slave_alloc(struct scsi_device *scsi_device) | |
3725 | { | |
3726 | struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; | |
3727 | struct DeviceCtlBlk *dcb; | |
3728 | ||
3729 | dcb = device_alloc(acb, scsi_device->id, scsi_device->lun); | |
3730 | if (!dcb) | |
3731 | return -ENOMEM; | |
3732 | adapter_add_device(acb, dcb); | |
3733 | ||
3734 | return 0; | |
3735 | } | |
3736 | ||
3737 | ||
3738 | /** | |
3739 | * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a | |
3740 | * device that is going away. | |
3741 | * | |
3742 | * @scsi_device: The new scsi device that we need to handle. | |
3743 | **/ | |
3744 | static void dc395x_slave_destroy(struct scsi_device *scsi_device) | |
3745 | { | |
3746 | struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; | |
3747 | struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun); | |
3748 | if (dcb) | |
3749 | adapter_remove_and_free_device(acb, dcb); | |
3750 | } | |
3751 | ||
3752 | ||
3753 | ||
3754 | ||
3755 | /** | |
3756 | * trms1040_wait_30us: wait for 30 us | |
3757 | * | |
3758 | * Waits for 30us (using the chip by the looks of it..) | |
3759 | * | |
3760 | * @io_port: base I/O address | |
3761 | **/ | |
6f039790 | 3762 | static void trms1040_wait_30us(unsigned long io_port) |
1da177e4 LT |
3763 | { |
3764 | /* ScsiPortStallExecution(30); wait 30 us */ | |
3765 | outb(5, io_port + TRM_S1040_GEN_TIMER); | |
3766 | while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT)) | |
3767 | /* nothing */ ; | |
3768 | } | |
3769 | ||
3770 | ||
3771 | /** | |
3772 | * trms1040_write_cmd - write the secified command and address to | |
3773 | * chip | |
3774 | * | |
3775 | * @io_port: base I/O address | |
3776 | * @cmd: SB + op code (command) to send | |
3777 | * @addr: address to send | |
3778 | **/ | |
6f039790 | 3779 | static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr) |
1da177e4 LT |
3780 | { |
3781 | int i; | |
3782 | u8 send_data; | |
3783 | ||
3784 | /* program SB + OP code */ | |
3785 | for (i = 0; i < 3; i++, cmd <<= 1) { | |
3786 | send_data = NVR_SELECT; | |
3787 | if (cmd & 0x04) /* Start from bit 2 */ | |
3788 | send_data |= NVR_BITOUT; | |
3789 | ||
3790 | outb(send_data, io_port + TRM_S1040_GEN_NVRAM); | |
3791 | trms1040_wait_30us(io_port); | |
3792 | outb((send_data | NVR_CLOCK), | |
3793 | io_port + TRM_S1040_GEN_NVRAM); | |
3794 | trms1040_wait_30us(io_port); | |
3795 | } | |
3796 | ||
3797 | /* send address */ | |
3798 | for (i = 0; i < 7; i++, addr <<= 1) { | |
3799 | send_data = NVR_SELECT; | |
3800 | if (addr & 0x40) /* Start from bit 6 */ | |
3801 | send_data |= NVR_BITOUT; | |
3802 | ||
3803 | outb(send_data, io_port + TRM_S1040_GEN_NVRAM); | |
3804 | trms1040_wait_30us(io_port); | |
3805 | outb((send_data | NVR_CLOCK), | |
3806 | io_port + TRM_S1040_GEN_NVRAM); | |
3807 | trms1040_wait_30us(io_port); | |
3808 | } | |
3809 | outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); | |
3810 | trms1040_wait_30us(io_port); | |
3811 | } | |
3812 | ||
3813 | ||
3814 | /** | |
3815 | * trms1040_set_data - store a single byte in the eeprom | |
3816 | * | |
3817 | * Called from write all to write a single byte into the SSEEPROM | |
3818 | * Which is done one bit at a time. | |
3819 | * | |
3820 | * @io_port: base I/O address | |
3821 | * @addr: offset into EEPROM | |
3822 | * @byte: bytes to write | |
3823 | **/ | |
6f039790 | 3824 | static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte) |
1da177e4 LT |
3825 | { |
3826 | int i; | |
3827 | u8 send_data; | |
3828 | ||
3829 | /* Send write command & address */ | |
3830 | trms1040_write_cmd(io_port, 0x05, addr); | |
3831 | ||
3832 | /* Write data */ | |
3833 | for (i = 0; i < 8; i++, byte <<= 1) { | |
3834 | send_data = NVR_SELECT; | |
3835 | if (byte & 0x80) /* Start from bit 7 */ | |
3836 | send_data |= NVR_BITOUT; | |
3837 | ||
3838 | outb(send_data, io_port + TRM_S1040_GEN_NVRAM); | |
3839 | trms1040_wait_30us(io_port); | |
3840 | outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); | |
3841 | trms1040_wait_30us(io_port); | |
3842 | } | |
3843 | outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); | |
3844 | trms1040_wait_30us(io_port); | |
3845 | ||
3846 | /* Disable chip select */ | |
3847 | outb(0, io_port + TRM_S1040_GEN_NVRAM); | |
3848 | trms1040_wait_30us(io_port); | |
3849 | ||
3850 | outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); | |
3851 | trms1040_wait_30us(io_port); | |
3852 | ||
3853 | /* Wait for write ready */ | |
3854 | while (1) { | |
3855 | outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); | |
3856 | trms1040_wait_30us(io_port); | |
3857 | ||
3858 | outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); | |
3859 | trms1040_wait_30us(io_port); | |
3860 | ||
3861 | if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN) | |
3862 | break; | |
3863 | } | |
3864 | ||
3865 | /* Disable chip select */ | |
3866 | outb(0, io_port + TRM_S1040_GEN_NVRAM); | |
3867 | } | |
3868 | ||
3869 | ||
3870 | /** | |
3871 | * trms1040_write_all - write 128 bytes to the eeprom | |
3872 | * | |
3873 | * Write the supplied 128 bytes to the chips SEEPROM | |
3874 | * | |
3875 | * @eeprom: the data to write | |
3876 | * @io_port: the base io port | |
3877 | **/ | |
6f039790 | 3878 | static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port) |
1da177e4 LT |
3879 | { |
3880 | u8 *b_eeprom = (u8 *)eeprom; | |
3881 | u8 addr; | |
3882 | ||
3883 | /* Enable SEEPROM */ | |
3884 | outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), | |
3885 | io_port + TRM_S1040_GEN_CONTROL); | |
3886 | ||
3887 | /* write enable */ | |
3888 | trms1040_write_cmd(io_port, 0x04, 0xFF); | |
3889 | outb(0, io_port + TRM_S1040_GEN_NVRAM); | |
3890 | trms1040_wait_30us(io_port); | |
3891 | ||
3892 | /* write */ | |
3893 | for (addr = 0; addr < 128; addr++, b_eeprom++) | |
3894 | trms1040_set_data(io_port, addr, *b_eeprom); | |
3895 | ||
3896 | /* write disable */ | |
3897 | trms1040_write_cmd(io_port, 0x04, 0x00); | |
3898 | outb(0, io_port + TRM_S1040_GEN_NVRAM); | |
3899 | trms1040_wait_30us(io_port); | |
3900 | ||
3901 | /* Disable SEEPROM */ | |
3902 | outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), | |
3903 | io_port + TRM_S1040_GEN_CONTROL); | |
3904 | } | |
3905 | ||
3906 | ||
3907 | /** | |
3908 | * trms1040_get_data - get a single byte from the eeprom | |
3909 | * | |
3910 | * Called from read all to read a single byte into the SSEEPROM | |
3911 | * Which is done one bit at a time. | |
3912 | * | |
3913 | * @io_port: base I/O address | |
3914 | * @addr: offset into SEEPROM | |
3915 | * | |
59c51591 | 3916 | * Returns the byte read. |
1da177e4 | 3917 | **/ |
6f039790 | 3918 | static u8 trms1040_get_data(unsigned long io_port, u8 addr) |
1da177e4 LT |
3919 | { |
3920 | int i; | |
3921 | u8 read_byte; | |
3922 | u8 result = 0; | |
3923 | ||
3924 | /* Send read command & address */ | |
3925 | trms1040_write_cmd(io_port, 0x06, addr); | |
3926 | ||
3927 | /* read data */ | |
3928 | for (i = 0; i < 8; i++) { | |
3929 | outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); | |
3930 | trms1040_wait_30us(io_port); | |
3931 | outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); | |
3932 | ||
3933 | /* Get data bit while falling edge */ | |
3934 | read_byte = inb(io_port + TRM_S1040_GEN_NVRAM); | |
3935 | result <<= 1; | |
3936 | if (read_byte & NVR_BITIN) | |
3937 | result |= 1; | |
3938 | ||
3939 | trms1040_wait_30us(io_port); | |
3940 | } | |
3941 | ||
3942 | /* Disable chip select */ | |
3943 | outb(0, io_port + TRM_S1040_GEN_NVRAM); | |
3944 | return result; | |
3945 | } | |
3946 | ||
3947 | ||
3948 | /** | |
3949 | * trms1040_read_all - read all bytes from the eeprom | |
3950 | * | |
3951 | * Read the 128 bytes from the SEEPROM. | |
3952 | * | |
3953 | * @eeprom: where to store the data | |
3954 | * @io_port: the base io port | |
3955 | **/ | |
6f039790 | 3956 | static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port) |
1da177e4 LT |
3957 | { |
3958 | u8 *b_eeprom = (u8 *)eeprom; | |
3959 | u8 addr; | |
3960 | ||
3961 | /* Enable SEEPROM */ | |
3962 | outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), | |
3963 | io_port + TRM_S1040_GEN_CONTROL); | |
3964 | ||
3965 | /* read details */ | |
3966 | for (addr = 0; addr < 128; addr++, b_eeprom++) | |
3967 | *b_eeprom = trms1040_get_data(io_port, addr); | |
3968 | ||
3969 | /* Disable SEEPROM */ | |
3970 | outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), | |
3971 | io_port + TRM_S1040_GEN_CONTROL); | |
3972 | } | |
3973 | ||
3974 | ||
3975 | ||
3976 | /** | |
3977 | * check_eeprom - get and check contents of the eeprom | |
3978 | * | |
3979 | * Read seeprom 128 bytes into the memory provider in eeprom. | |
3980 | * Checks the checksum and if it's not correct it uses a set of default | |
3981 | * values. | |
3982 | * | |
3983 | * @eeprom: caller allocated strcuture to read the eeprom data into | |
3984 | * @io_port: io port to read from | |
3985 | **/ | |
6f039790 | 3986 | static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port) |
1da177e4 LT |
3987 | { |
3988 | u16 *w_eeprom = (u16 *)eeprom; | |
3989 | u16 w_addr; | |
3990 | u16 cksum; | |
3991 | u32 d_addr; | |
3992 | u32 *d_eeprom; | |
3993 | ||
3994 | trms1040_read_all(eeprom, io_port); /* read eeprom */ | |
3995 | ||
3996 | cksum = 0; | |
3997 | for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64; | |
3998 | w_addr++, w_eeprom++) | |
3999 | cksum += *w_eeprom; | |
4000 | if (cksum != 0x1234) { | |
4001 | /* | |
4002 | * Checksum is wrong. | |
4003 | * Load a set of defaults into the eeprom buffer | |
4004 | */ | |
4005 | dprintkl(KERN_WARNING, | |
4006 | "EEProm checksum error: using default values and options.\n"); | |
4007 | eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; | |
4008 | eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); | |
4009 | eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; | |
4010 | eeprom->sub_sys_id[1] = | |
4011 | (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); | |
4012 | eeprom->sub_class = 0x00; | |
4013 | eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; | |
4014 | eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); | |
4015 | eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; | |
4016 | eeprom->device_id[1] = | |
4017 | (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); | |
4018 | eeprom->reserved = 0x00; | |
4019 | ||
4020 | for (d_addr = 0, d_eeprom = (u32 *)eeprom->target; | |
4021 | d_addr < 16; d_addr++, d_eeprom++) | |
4022 | *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */ | |
4023 | ||
4024 | *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */ | |
4025 | *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */ | |
4026 | for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++) | |
4027 | *d_eeprom = 0x00; | |
4028 | ||
4029 | /* Now load defaults (maybe set by boot/module params) */ | |
4030 | set_safe_settings(); | |
4031 | fix_settings(); | |
4032 | eeprom_override(eeprom); | |
4033 | ||
4034 | eeprom->cksum = 0x00; | |
4035 | for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom; | |
4036 | w_addr < 63; w_addr++, w_eeprom++) | |
4037 | cksum += *w_eeprom; | |
4038 | ||
4039 | *w_eeprom = 0x1234 - cksum; | |
4040 | trms1040_write_all(eeprom, io_port); | |
4041 | eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value; | |
4042 | } else { | |
4043 | set_safe_settings(); | |
4044 | eeprom_index_to_delay(eeprom); | |
4045 | eeprom_override(eeprom); | |
4046 | } | |
4047 | } | |
4048 | ||
4049 | ||
4050 | /** | |
4051 | * print_eeprom_settings - output the eeprom settings | |
4052 | * to the kernel log so people can see what they were. | |
4053 | * | |
4054 | * @eeprom: The eeprom data strucutre to show details for. | |
4055 | **/ | |
6f039790 | 4056 | static void print_eeprom_settings(struct NvRamType *eeprom) |
1da177e4 LT |
4057 | { |
4058 | dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n", | |
4059 | eeprom->scsi_id, | |
4060 | eeprom->target[0].period, | |
4061 | clock_speed[eeprom->target[0].period] / 10, | |
4062 | clock_speed[eeprom->target[0].period] % 10, | |
4063 | eeprom->target[0].cfg0); | |
4064 | dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n", | |
4065 | eeprom->channel_cfg, eeprom->max_tag, | |
4066 | 1 << eeprom->max_tag, eeprom->delay_time); | |
4067 | } | |
4068 | ||
4069 | ||
4070 | /* Free SG tables */ | |
4071 | static void adapter_sg_tables_free(struct AdapterCtlBlk *acb) | |
4072 | { | |
4073 | int i; | |
4074 | const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; | |
4075 | ||
4076 | for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page) | |
c9475cb0 | 4077 | kfree(acb->srb_array[i].segment_x); |
1da177e4 LT |
4078 | } |
4079 | ||
4080 | ||
4081 | /* | |
4082 | * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*) | |
4083 | * should never cross a page boundary */ | |
6f039790 | 4084 | static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb) |
1da177e4 LT |
4085 | { |
4086 | const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1) | |
4087 | *SEGMENTX_LEN; | |
4088 | int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE; | |
4089 | const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; | |
4090 | int srb_idx = 0; | |
4091 | unsigned i = 0; | |
3f649ab7 | 4092 | struct SGentry *ptr; |
1da177e4 | 4093 | |
b4b08e58 | 4094 | for (i = 0; i < DC395x_MAX_SRB_CNT; i++) |
1da177e4 | 4095 | acb->srb_array[i].segment_x = NULL; |
1da177e4 LT |
4096 | |
4097 | dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages); | |
4098 | while (pages--) { | |
5cbded58 | 4099 | ptr = kmalloc(PAGE_SIZE, GFP_KERNEL); |
1da177e4 LT |
4100 | if (!ptr) { |
4101 | adapter_sg_tables_free(acb); | |
4102 | return 1; | |
4103 | } | |
4104 | dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n", | |
4105 | PAGE_SIZE, ptr, srb_idx); | |
4106 | i = 0; | |
4107 | while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT) | |
4108 | acb->srb_array[srb_idx++].segment_x = | |
4109 | ptr + (i++ * DC395x_MAX_SG_LISTENTRY); | |
4110 | } | |
4111 | if (i < srbs_per_page) | |
4112 | acb->srb.segment_x = | |
4113 | ptr + (i * DC395x_MAX_SG_LISTENTRY); | |
4114 | else | |
4115 | dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n"); | |
1da177e4 LT |
4116 | return 0; |
4117 | } | |
4118 | ||
4119 | ||
4120 | ||
4121 | /** | |
4122 | * adapter_print_config - print adapter connection and termination | |
4123 | * config | |
4124 | * | |
4125 | * The io port in the adapter needs to have been set before calling | |
4126 | * this function. | |
4127 | * | |
4128 | * @acb: The adapter to print the information for. | |
4129 | **/ | |
6f039790 | 4130 | static void adapter_print_config(struct AdapterCtlBlk *acb) |
1da177e4 LT |
4131 | { |
4132 | u8 bval; | |
4133 | ||
4134 | bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS); | |
4135 | dprintkl(KERN_INFO, "%sConnectors: ", | |
4136 | ((bval & WIDESCSI) ? "(Wide) " : "")); | |
4137 | if (!(bval & CON5068)) | |
4138 | printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50"); | |
4139 | if (!(bval & CON68)) | |
4140 | printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)"); | |
4141 | if (!(bval & CON50)) | |
4142 | printk("int50 "); | |
4143 | if ((bval & (CON5068 | CON50 | CON68)) == | |
4144 | 0 /*(CON5068 | CON50 | CON68) */ ) | |
4145 | printk(" Oops! (All 3?) "); | |
4146 | bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL); | |
4147 | printk(" Termination: "); | |
4148 | if (bval & DIS_TERM) | |
4149 | printk("Disabled\n"); | |
4150 | else { | |
4151 | if (bval & AUTOTERM) | |
4152 | printk("Auto "); | |
4153 | if (bval & LOW8TERM) | |
4154 | printk("Low "); | |
4155 | if (bval & UP8TERM) | |
4156 | printk("High "); | |
4157 | printk("\n"); | |
4158 | } | |
4159 | } | |
4160 | ||
4161 | ||
4162 | /** | |
4163 | * adapter_init_params - Initialize the various parameters in the | |
4164 | * adapter structure. Note that the pointer to the scsi_host is set | |
4165 | * early (when this instance is created) and the io_port and irq | |
4166 | * values are set later after they have been reserved. This just gets | |
4167 | * everything set to a good starting position. | |
4168 | * | |
4169 | * The eeprom structure in the adapter needs to have been set before | |
4170 | * calling this function. | |
4171 | * | |
4172 | * @acb: The adapter to initialize. | |
4173 | **/ | |
6f039790 | 4174 | static void adapter_init_params(struct AdapterCtlBlk *acb) |
1da177e4 LT |
4175 | { |
4176 | struct NvRamType *eeprom = &acb->eeprom; | |
4177 | int i; | |
4178 | ||
4179 | /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */ | |
4180 | /* NOTE: acb->io_port_base is set at port registration time */ | |
4181 | /* NOTE: acb->io_port_len is set at port registration time */ | |
4182 | ||
4183 | INIT_LIST_HEAD(&acb->dcb_list); | |
4184 | acb->dcb_run_robin = NULL; | |
4185 | acb->active_dcb = NULL; | |
4186 | ||
4187 | INIT_LIST_HEAD(&acb->srb_free_list); | |
4188 | /* temp SRB for Q tag used or abort command used */ | |
4189 | acb->tmp_srb = &acb->srb; | |
af53b89b KC |
4190 | timer_setup(&acb->waiting_timer, waiting_timeout, 0); |
4191 | timer_setup(&acb->selto_timer, NULL, 0); | |
1da177e4 LT |
4192 | |
4193 | acb->srb_count = DC395x_MAX_SRB_CNT; | |
4194 | ||
4195 | acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */ | |
4196 | /* NOTE: acb->irq_level is set at IRQ registration time */ | |
4197 | ||
4198 | acb->tag_max_num = 1 << eeprom->max_tag; | |
4199 | if (acb->tag_max_num > 30) | |
4200 | acb->tag_max_num = 30; | |
4201 | ||
4202 | acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */ | |
4203 | acb->gmode2 = eeprom->channel_cfg; | |
4204 | acb->config = 0; /* NOTE: actually set in adapter_init_chip */ | |
4205 | ||
4206 | if (eeprom->channel_cfg & NAC_SCANLUN) | |
4207 | acb->lun_chk = 1; | |
4208 | acb->scan_devices = 1; | |
4209 | ||
4210 | acb->scsi_host->this_id = eeprom->scsi_id; | |
4211 | acb->hostid_bit = (1 << acb->scsi_host->this_id); | |
4212 | ||
4213 | for (i = 0; i < DC395x_MAX_SCSI_ID; i++) | |
4214 | acb->dcb_map[i] = 0; | |
4215 | ||
4216 | acb->msg_len = 0; | |
4217 | ||
4218 | /* link static array of srbs into the srb free list */ | |
4219 | for (i = 0; i < acb->srb_count - 1; i++) | |
cd29660d | 4220 | list_add_tail(&acb->srb_array[i].list, &acb->srb_free_list); |
1da177e4 LT |
4221 | } |
4222 | ||
4223 | ||
4224 | /** | |
167b7e6b | 4225 | * adapter_init_scsi_host - Initialize the scsi host instance based on |
1da177e4 LT |
4226 | * values that we have already stored in the adapter instance. There's |
4227 | * some mention that a lot of these are deprecated, so we won't use | |
4228 | * them (we'll use the ones in the adapter instance) but we'll fill | |
4229 | * them in in case something else needs them. | |
4230 | * | |
4231 | * The eeprom structure, irq and io ports in the adapter need to have | |
4232 | * been set before calling this function. | |
4233 | * | |
4234 | * @host: The scsi host instance to fill in the values for. | |
4235 | **/ | |
6f039790 | 4236 | static void adapter_init_scsi_host(struct Scsi_Host *host) |
1da177e4 LT |
4237 | { |
4238 | struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; | |
4239 | struct NvRamType *eeprom = &acb->eeprom; | |
4240 | ||
4241 | host->max_cmd_len = 24; | |
4242 | host->can_queue = DC395x_MAX_CMD_QUEUE; | |
4243 | host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN; | |
4244 | host->this_id = (int)eeprom->scsi_id; | |
4245 | host->io_port = acb->io_port_base; | |
4246 | host->n_io_port = acb->io_port_len; | |
4247 | host->dma_channel = -1; | |
4248 | host->unique_id = acb->io_port_base; | |
4249 | host->irq = acb->irq_level; | |
53a8936c | 4250 | acb->last_reset = jiffies; |
1da177e4 LT |
4251 | |
4252 | host->max_id = 16; | |
4253 | if (host->max_id - 1 == eeprom->scsi_id) | |
4254 | host->max_id--; | |
4255 | ||
1da177e4 LT |
4256 | if (eeprom->channel_cfg & NAC_SCANLUN) |
4257 | host->max_lun = 8; | |
4258 | else | |
4259 | host->max_lun = 1; | |
1da177e4 LT |
4260 | } |
4261 | ||
4262 | ||
4263 | /** | |
4264 | * adapter_init_chip - Get the chip into a know state and figure out | |
4265 | * some of the settings that apply to this adapter. | |
4266 | * | |
4267 | * The io port in the adapter needs to have been set before calling | |
4268 | * this function. The config will be configured correctly on return. | |
4269 | * | |
4270 | * @acb: The adapter which we are to init. | |
4271 | **/ | |
6f039790 | 4272 | static void adapter_init_chip(struct AdapterCtlBlk *acb) |
1da177e4 LT |
4273 | { |
4274 | struct NvRamType *eeprom = &acb->eeprom; | |
4275 | ||
4276 | /* Mask all the interrupt */ | |
4277 | DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); | |
4278 | DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); | |
4279 | ||
4280 | /* Reset SCSI module */ | |
4281 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); | |
4282 | ||
4283 | /* Reset PCI/DMA module */ | |
4284 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); | |
4285 | udelay(20); | |
4286 | ||
4287 | /* program configuration 0 */ | |
4288 | acb->config = HCC_AUTOTERM | HCC_PARITY; | |
4289 | if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI) | |
4290 | acb->config |= HCC_WIDE_CARD; | |
4291 | ||
4292 | if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET) | |
4293 | acb->config |= HCC_SCSI_RESET; | |
4294 | ||
4295 | if (acb->config & HCC_SCSI_RESET) { | |
4296 | dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n"); | |
4297 | DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); | |
4298 | ||
4299 | /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */ | |
4300 | /*spin_unlock_irq (&io_request_lock); */ | |
4301 | udelay(500); | |
4302 | ||
53a8936c | 4303 | acb->last_reset = |
1da177e4 LT |
4304 | jiffies + HZ / 2 + |
4305 | HZ * acb->eeprom.delay_time; | |
4306 | ||
4307 | /*spin_lock_irq (&io_request_lock); */ | |
4308 | } | |
4309 | } | |
4310 | ||
4311 | ||
4312 | /** | |
167b7e6b | 4313 | * adapter_init - Grab the resource for the card, setup the adapter |
1da177e4 LT |
4314 | * information, set the card into a known state, create the various |
4315 | * tables etc etc. This basically gets all adapter information all up | |
b595076a | 4316 | * to date, initialised and gets the chip in sync with it. |
1da177e4 | 4317 | * |
33c8ef95 | 4318 | * @acb: The adapter which we are to init. |
1da177e4 | 4319 | * @io_port: The base I/O port |
33c8ef95 | 4320 | * @io_port_len: The I/O port size |
1da177e4 LT |
4321 | * @irq: IRQ |
4322 | * | |
4323 | * Returns 0 if the initialization succeeds, any other value on | |
4324 | * failure. | |
4325 | **/ | |
6f039790 GKH |
4326 | static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port, |
4327 | u32 io_port_len, unsigned int irq) | |
1da177e4 LT |
4328 | { |
4329 | if (!request_region(io_port, io_port_len, DC395X_NAME)) { | |
4330 | dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port); | |
4331 | goto failed; | |
4332 | } | |
4333 | /* store port base to indicate we have registered it */ | |
4334 | acb->io_port_base = io_port; | |
4335 | acb->io_port_len = io_port_len; | |
4336 | ||
1d6f359a | 4337 | if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) { |
1da177e4 LT |
4338 | /* release the region we just claimed */ |
4339 | dprintkl(KERN_INFO, "Failed to register IRQ\n"); | |
4340 | goto failed; | |
4341 | } | |
4342 | /* store irq to indicate we have registered it */ | |
4343 | acb->irq_level = irq; | |
4344 | ||
4345 | /* get eeprom configuration information and command line settings etc */ | |
4346 | check_eeprom(&acb->eeprom, io_port); | |
4347 | print_eeprom_settings(&acb->eeprom); | |
4348 | ||
4349 | /* setup adapter control block */ | |
4350 | adapter_init_params(acb); | |
4351 | ||
4352 | /* display card connectors/termination settings */ | |
4353 | adapter_print_config(acb); | |
4354 | ||
4355 | if (adapter_sg_tables_alloc(acb)) { | |
4356 | dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n"); | |
4357 | goto failed; | |
4358 | } | |
4359 | adapter_init_scsi_host(acb->scsi_host); | |
4360 | adapter_init_chip(acb); | |
4361 | set_basic_config(acb); | |
4362 | ||
4363 | dprintkdbg(DBG_0, | |
4364 | "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p " | |
4365 | "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n", | |
4366 | acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk), | |
4367 | sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk)); | |
4368 | return 0; | |
4369 | ||
4370 | failed: | |
4371 | if (acb->irq_level) | |
4372 | free_irq(acb->irq_level, acb); | |
4373 | if (acb->io_port_base) | |
4374 | release_region(acb->io_port_base, acb->io_port_len); | |
4375 | adapter_sg_tables_free(acb); | |
4376 | ||
4377 | return 1; | |
4378 | } | |
4379 | ||
4380 | ||
4381 | /** | |
4382 | * adapter_uninit_chip - cleanly shut down the scsi controller chip, | |
4383 | * stopping all operations and disabling interrupt generation on the | |
4384 | * card. | |
4385 | * | |
4386 | * @acb: The adapter which we are to shutdown. | |
4387 | **/ | |
4388 | static void adapter_uninit_chip(struct AdapterCtlBlk *acb) | |
4389 | { | |
4390 | /* disable interrupts */ | |
4391 | DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0); | |
4392 | DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0); | |
4393 | ||
4394 | /* reset the scsi bus */ | |
4395 | if (acb->config & HCC_SCSI_RESET) | |
4396 | reset_scsi_bus(acb); | |
4397 | ||
3a4fa0a2 | 4398 | /* clear any pending interrupt state */ |
1da177e4 LT |
4399 | DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); |
4400 | } | |
4401 | ||
4402 | ||
4403 | ||
4404 | /** | |
4405 | * adapter_uninit - Shut down the chip and release any resources that | |
4406 | * we had allocated. Once this returns the adapter should not be used | |
4407 | * anymore. | |
4408 | * | |
4409 | * @acb: The adapter which we are to un-initialize. | |
4410 | **/ | |
4411 | static void adapter_uninit(struct AdapterCtlBlk *acb) | |
4412 | { | |
4413 | unsigned long flags; | |
4414 | DC395x_LOCK_IO(acb->scsi_host, flags); | |
4415 | ||
4416 | /* remove timers */ | |
4417 | if (timer_pending(&acb->waiting_timer)) | |
4418 | del_timer(&acb->waiting_timer); | |
4419 | if (timer_pending(&acb->selto_timer)) | |
4420 | del_timer(&acb->selto_timer); | |
4421 | ||
4422 | adapter_uninit_chip(acb); | |
4423 | adapter_remove_and_free_all_devices(acb); | |
4424 | DC395x_UNLOCK_IO(acb->scsi_host, flags); | |
4425 | ||
4426 | if (acb->irq_level) | |
4427 | free_irq(acb->irq_level, acb); | |
4428 | if (acb->io_port_base) | |
4429 | release_region(acb->io_port_base, acb->io_port_len); | |
4430 | ||
4431 | adapter_sg_tables_free(acb); | |
4432 | } | |
4433 | ||
4434 | ||
1da177e4 LT |
4435 | #undef YESNO |
4436 | #define YESNO(YN) \ | |
0c3de38f RV |
4437 | if (YN) seq_printf(m, " Yes ");\ |
4438 | else seq_printf(m, " No ") | |
1da177e4 | 4439 | |
d32812ae | 4440 | static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host) |
1da177e4 LT |
4441 | { |
4442 | struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; | |
4443 | int spd, spd1; | |
1da177e4 LT |
4444 | struct DeviceCtlBlk *dcb; |
4445 | unsigned long flags; | |
4446 | int dev; | |
4447 | ||
3d30079c RV |
4448 | seq_puts(m, DC395X_BANNER " PCI SCSI Host Adapter\n" |
4449 | " Driver Version " DC395X_VERSION "\n"); | |
1da177e4 LT |
4450 | |
4451 | DC395x_LOCK_IO(acb->scsi_host, flags); | |
4452 | ||
0c3de38f RV |
4453 | seq_printf(m, "SCSI Host Nr %i, ", host->host_no); |
4454 | seq_printf(m, "DC395U/UW/F DC315/U %s\n", | |
1da177e4 | 4455 | (acb->config & HCC_WIDE_CARD) ? "Wide" : ""); |
0c3de38f RV |
4456 | seq_printf(m, "io_port_base 0x%04lx, ", acb->io_port_base); |
4457 | seq_printf(m, "irq_level 0x%04x, ", acb->irq_level); | |
4458 | seq_printf(m, " SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000); | |
1da177e4 | 4459 | |
0c3de38f RV |
4460 | seq_printf(m, "MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun); |
4461 | seq_printf(m, "AdapterID %i\n", host->this_id); | |
1da177e4 | 4462 | |
0c3de38f RV |
4463 | seq_printf(m, "tag_max_num %i", acb->tag_max_num); |
4464 | /*seq_printf(m, ", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */ | |
4465 | seq_printf(m, ", FilterCfg 0x%02x", | |
1da177e4 | 4466 | DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1)); |
0c3de38f RV |
4467 | seq_printf(m, ", DelayReset %is\n", acb->eeprom.delay_time); |
4468 | /*seq_printf(m, "\n"); */ | |
1da177e4 | 4469 | |
0c3de38f | 4470 | seq_printf(m, "Nr of DCBs: %i\n", list_size(&acb->dcb_list)); |
ca358af1 AS |
4471 | seq_printf(m, "Map of attached LUNs: %8ph\n", &acb->dcb_map[0]); |
4472 | seq_printf(m, " %8ph\n", &acb->dcb_map[8]); | |
1da177e4 | 4473 | |
91c40f24 RV |
4474 | seq_puts(m, |
4475 | "Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n"); | |
1da177e4 LT |
4476 | |
4477 | dev = 0; | |
4478 | list_for_each_entry(dcb, &acb->dcb_list, list) { | |
4479 | int nego_period; | |
0c3de38f | 4480 | seq_printf(m, "%02i %02i %02i ", dev, dcb->target_id, |
1da177e4 LT |
4481 | dcb->target_lun); |
4482 | YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK); | |
4483 | YESNO(dcb->sync_offset); | |
4484 | YESNO(dcb->sync_period & WIDE_SYNC); | |
4485 | YESNO(dcb->dev_mode & NTC_DO_DISCONNECT); | |
4486 | YESNO(dcb->dev_mode & NTC_DO_SEND_START); | |
4487 | YESNO(dcb->sync_mode & EN_TAG_QUEUEING); | |
4488 | nego_period = clock_period[dcb->sync_period & 0x07] << 2; | |
4489 | if (dcb->sync_offset) | |
0c3de38f | 4490 | seq_printf(m, " %03i ns ", nego_period); |
1da177e4 | 4491 | else |
0c3de38f | 4492 | seq_printf(m, " (%03i ns)", (dcb->min_nego_period << 2)); |
1da177e4 LT |
4493 | |
4494 | if (dcb->sync_offset & 0x0f) { | |
4495 | spd = 1000 / (nego_period); | |
4496 | spd1 = 1000 % (nego_period); | |
4497 | spd1 = (spd1 * 10 + nego_period / 2) / (nego_period); | |
0c3de38f | 4498 | seq_printf(m, " %2i.%1i M %02i ", spd, spd1, |
1da177e4 LT |
4499 | (dcb->sync_offset & 0x0f)); |
4500 | } else | |
91c40f24 | 4501 | seq_puts(m, " "); |
1da177e4 LT |
4502 | |
4503 | /* Add more info ... */ | |
0c3de38f | 4504 | seq_printf(m, " %02i\n", dcb->max_command); |
1da177e4 LT |
4505 | dev++; |
4506 | } | |
4507 | ||
4508 | if (timer_pending(&acb->waiting_timer)) | |
91c40f24 | 4509 | seq_puts(m, "Waiting queue timer running\n"); |
1da177e4 | 4510 | else |
f50332ff | 4511 | seq_putc(m, '\n'); |
1da177e4 LT |
4512 | |
4513 | list_for_each_entry(dcb, &acb->dcb_list, list) { | |
4514 | struct ScsiReqBlk *srb; | |
4515 | if (!list_empty(&dcb->srb_waiting_list)) | |
0c3de38f | 4516 | seq_printf(m, "DCB (%02i-%i): Waiting: %i:", |
1da177e4 LT |
4517 | dcb->target_id, dcb->target_lun, |
4518 | list_size(&dcb->srb_waiting_list)); | |
4519 | list_for_each_entry(srb, &dcb->srb_waiting_list, list) | |
0c3de38f | 4520 | seq_printf(m, " %p", srb->cmd); |
1da177e4 | 4521 | if (!list_empty(&dcb->srb_going_list)) |
0c3de38f | 4522 | seq_printf(m, "\nDCB (%02i-%i): Going : %i:", |
1da177e4 LT |
4523 | dcb->target_id, dcb->target_lun, |
4524 | list_size(&dcb->srb_going_list)); | |
4525 | list_for_each_entry(srb, &dcb->srb_going_list, list) | |
0c3de38f | 4526 | seq_printf(m, " %p", srb->cmd); |
1da177e4 | 4527 | if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list)) |
f50332ff | 4528 | seq_putc(m, '\n'); |
1da177e4 LT |
4529 | } |
4530 | ||
4531 | if (debug_enabled(DBG_1)) { | |
0c3de38f | 4532 | seq_printf(m, "DCB list for ACB %p:\n", acb); |
1da177e4 | 4533 | list_for_each_entry(dcb, &acb->dcb_list, list) { |
0c3de38f | 4534 | seq_printf(m, "%p -> ", dcb); |
1da177e4 | 4535 | } |
91c40f24 | 4536 | seq_puts(m, "END\n"); |
1da177e4 LT |
4537 | } |
4538 | ||
1da177e4 | 4539 | DC395x_UNLOCK_IO(acb->scsi_host, flags); |
d32812ae | 4540 | return 0; |
1da177e4 LT |
4541 | } |
4542 | ||
4543 | ||
4544 | static struct scsi_host_template dc395x_driver_template = { | |
4545 | .module = THIS_MODULE, | |
4546 | .proc_name = DC395X_NAME, | |
d32812ae | 4547 | .show_info = dc395x_show_info, |
1da177e4 LT |
4548 | .name = DC395X_BANNER " " DC395X_VERSION, |
4549 | .queuecommand = dc395x_queue_command, | |
1da177e4 LT |
4550 | .slave_alloc = dc395x_slave_alloc, |
4551 | .slave_destroy = dc395x_slave_destroy, | |
4552 | .can_queue = DC395x_MAX_CAN_QUEUE, | |
4553 | .this_id = 7, | |
4554 | .sg_tablesize = DC395x_MAX_SG_TABLESIZE, | |
4555 | .cmd_per_lun = DC395x_MAX_CMD_PER_LUN, | |
4556 | .eh_abort_handler = dc395x_eh_abort, | |
4557 | .eh_bus_reset_handler = dc395x_eh_bus_reset, | |
4af14d11 | 4558 | .dma_boundary = PAGE_SIZE - 1, |
1da177e4 LT |
4559 | }; |
4560 | ||
4561 | ||
4562 | /** | |
4563 | * banner_display - Display banner on first instance of driver | |
4564 | * initialized. | |
4565 | **/ | |
4566 | static void banner_display(void) | |
4567 | { | |
4568 | static int banner_done = 0; | |
4569 | if (!banner_done) | |
4570 | { | |
4571 | dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION); | |
4572 | banner_done = 1; | |
4573 | } | |
4574 | } | |
4575 | ||
4576 | ||
4577 | /** | |
4578 | * dc395x_init_one - Initialise a single instance of the adapter. | |
4579 | * | |
4580 | * The PCI layer will call this once for each instance of the adapter | |
4581 | * that it finds in the system. The pci_dev strcuture indicates which | |
4582 | * instance we are being called from. | |
4583 | * | |
b595076a | 4584 | * @dev: The PCI device to initialize. |
1da177e4 LT |
4585 | * @id: Looks like a pointer to the entry in our pci device table |
4586 | * that was actually matched by the PCI subsystem. | |
4587 | * | |
4588 | * Returns 0 on success, or an error code (-ve) on failure. | |
4589 | **/ | |
6f039790 | 4590 | static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id) |
1da177e4 LT |
4591 | { |
4592 | struct Scsi_Host *scsi_host = NULL; | |
4593 | struct AdapterCtlBlk *acb = NULL; | |
4594 | unsigned long io_port_base; | |
4595 | unsigned int io_port_len; | |
4596 | unsigned int irq; | |
4597 | ||
4598 | dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev)); | |
4599 | banner_display(); | |
4600 | ||
4601 | if (pci_enable_device(dev)) | |
4602 | { | |
4603 | dprintkl(KERN_INFO, "PCI Enable device failed.\n"); | |
4604 | return -ENODEV; | |
4605 | } | |
4606 | io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK; | |
4607 | io_port_len = pci_resource_len(dev, 0); | |
4608 | irq = dev->irq; | |
4609 | dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq); | |
4610 | ||
4611 | /* allocate scsi host information (includes out adapter) */ | |
4612 | scsi_host = scsi_host_alloc(&dc395x_driver_template, | |
4613 | sizeof(struct AdapterCtlBlk)); | |
4614 | if (!scsi_host) { | |
4615 | dprintkl(KERN_INFO, "scsi_host_alloc failed\n"); | |
4616 | goto fail; | |
4617 | } | |
4618 | acb = (struct AdapterCtlBlk*)scsi_host->hostdata; | |
4619 | acb->scsi_host = scsi_host; | |
4620 | acb->dev = dev; | |
4621 | ||
4622 | /* initialise the adapter and everything we need */ | |
4623 | if (adapter_init(acb, io_port_base, io_port_len, irq)) { | |
4624 | dprintkl(KERN_INFO, "adapter init failed\n"); | |
cbd9a334 | 4625 | acb = NULL; |
1da177e4 LT |
4626 | goto fail; |
4627 | } | |
4628 | ||
4629 | pci_set_master(dev); | |
4630 | ||
4631 | /* get the scsi mid level to scan for new devices on the bus */ | |
4632 | if (scsi_add_host(scsi_host, &dev->dev)) { | |
4633 | dprintkl(KERN_ERR, "scsi_add_host failed\n"); | |
4634 | goto fail; | |
4635 | } | |
4636 | pci_set_drvdata(dev, scsi_host); | |
4637 | scsi_scan_host(scsi_host); | |
4638 | ||
4639 | return 0; | |
4640 | ||
4641 | fail: | |
4642 | if (acb != NULL) | |
4643 | adapter_uninit(acb); | |
4644 | if (scsi_host != NULL) | |
4645 | scsi_host_put(scsi_host); | |
4646 | pci_disable_device(dev); | |
4647 | return -ENODEV; | |
4648 | } | |
4649 | ||
4650 | ||
4651 | /** | |
4652 | * dc395x_remove_one - Called to remove a single instance of the | |
4653 | * adapter. | |
4654 | * | |
b595076a | 4655 | * @dev: The PCI device to initialize. |
1da177e4 | 4656 | **/ |
6f039790 | 4657 | static void dc395x_remove_one(struct pci_dev *dev) |
1da177e4 LT |
4658 | { |
4659 | struct Scsi_Host *scsi_host = pci_get_drvdata(dev); | |
4660 | struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata); | |
4661 | ||
4662 | dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb); | |
4663 | ||
4664 | scsi_remove_host(scsi_host); | |
4665 | adapter_uninit(acb); | |
4666 | pci_disable_device(dev); | |
4667 | scsi_host_put(scsi_host); | |
1da177e4 LT |
4668 | } |
4669 | ||
4670 | ||
4671 | static struct pci_device_id dc395x_pci_table[] = { | |
4672 | { | |
4673 | .vendor = PCI_VENDOR_ID_TEKRAM, | |
4674 | .device = PCI_DEVICE_ID_TEKRAM_TRMS1040, | |
4675 | .subvendor = PCI_ANY_ID, | |
4676 | .subdevice = PCI_ANY_ID, | |
4677 | }, | |
4678 | {} /* Terminating entry */ | |
4679 | }; | |
4680 | MODULE_DEVICE_TABLE(pci, dc395x_pci_table); | |
4681 | ||
4682 | ||
4683 | static struct pci_driver dc395x_driver = { | |
4684 | .name = DC395X_NAME, | |
4685 | .id_table = dc395x_pci_table, | |
4686 | .probe = dc395x_init_one, | |
6f039790 | 4687 | .remove = dc395x_remove_one, |
1da177e4 | 4688 | }; |
75c31c80 | 4689 | module_pci_driver(dc395x_driver); |
1da177e4 LT |
4690 | |
4691 | MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff"); | |
4692 | MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series"); | |
4693 | MODULE_LICENSE("GPL"); |