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ALSA: seq: Fix copy_from_user() call inside lock
[linux/fpc-iii.git] / drivers / scsi / 3w-xxxx.c
blobb327742b95ef82e31ecd09a5193f48772b235970
1 /*
2 3w-xxxx.c -- 3ware Storage Controller device driver for Linux.
3
4 Written By: Adam Radford <linuxraid@lsi.com>
5 Modifications By: Joel Jacobson <linux@3ware.com>
6 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
7 Brad Strand <linux@3ware.com>
8
9 Copyright (C) 1999-2010 3ware Inc.
10
11 Kernel compatibility By: Andre Hedrick <andre@suse.com>
12 Non-Copyright (C) 2000 Andre Hedrick <andre@suse.com>
13
14 Further tiny build fixes and trivial hoovering Alan Cox
15
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; version 2 of the License.
19
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
24
25 NO WARRANTY
26 THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
27 CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
28 LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
29 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
30 solely responsible for determining the appropriateness of using and
31 distributing the Program and assumes all risks associated with its
32 exercise of rights under this Agreement, including but not limited to
33 the risks and costs of program errors, damage to or loss of data,
34 programs or equipment, and unavailability or interruption of operations.
35
36 DISCLAIMER OF LIABILITY
37 NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
38 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39 DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
40 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
41 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
42 USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
43 HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
44
45 You should have received a copy of the GNU General Public License
46 along with this program; if not, write to the Free Software
47 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
48
49 Bugs/Comments/Suggestions should be mailed to:
50 linuxraid@lsi.com
51
52 For more information, goto:
53 http://www.lsi.com
54
55 History
56 -------
57 0.1.000 - Initial release.
58 0.4.000 - Added support for Asynchronous Event Notification through
59 ioctls for 3DM.
60 1.0.000 - Added DPO & FUA bit support for WRITE_10 & WRITE_6 cdb
61 to disable drive write-cache before writes.
62 1.1.000 - Fixed performance bug with DPO & FUA not existing for WRITE_6.
63 1.2.000 - Added support for clean shutdown notification/feature table.
64 1.02.00.001 - Added support for full command packet posts through ioctls
65 for 3DM.
66 Bug fix so hot spare drives don't show up.
67 1.02.00.002 - Fix bug with tw_setfeature() call that caused oops on some
68 systems.
69 08/21/00 - release previously allocated resources on failure at
70 tw_allocate_memory (acme)
71 1.02.00.003 - Fix tw_interrupt() to report error to scsi layer when
72 controller status is non-zero.
73 Added handling of request_sense opcode.
74 Fix possible null pointer dereference in
75 tw_reset_device_extension()
76 1.02.00.004 - Add support for device id of 3ware 7000 series controllers.
77 Make tw_setfeature() call with interrupts disabled.
78 Register interrupt handler before enabling interrupts.
79 Clear attention interrupt before draining aen queue.
80 1.02.00.005 - Allocate bounce buffers and custom queue depth for raid5 for
81 6000 and 5000 series controllers.
82 Reduce polling mdelays causing problems on some systems.
83 Fix use_sg = 1 calculation bug.
84 Check for scsi_register returning NULL.
85 Add aen count to /proc/scsi/3w-xxxx.
86 Remove aen code unit masking in tw_aen_complete().
87 1.02.00.006 - Remove unit from printk in tw_scsi_eh_abort(), causing
88 possible oops.
89 Fix possible null pointer dereference in tw_scsi_queue()
90 if done function pointer was invalid.
91 1.02.00.007 - Fix possible null pointer dereferences in tw_ioctl().
92 Remove check for invalid done function pointer from
93 tw_scsi_queue().
94 1.02.00.008 - Set max sectors per io to TW_MAX_SECTORS in tw_findcards().
95 Add tw_decode_error() for printing readable error messages.
96 Print some useful information on certain aen codes.
97 Add tw_decode_bits() for interpreting status register output.
98 Make scsi_set_pci_device() for kernels >= 2.4.4
99 Fix bug where aen's could be lost before a reset.
100 Re-add spinlocks in tw_scsi_detect().
101 Fix possible null pointer dereference in tw_aen_drain_queue()
102 during initialization.
103 Clear pci parity errors during initialization and during io.
104 1.02.00.009 - Remove redundant increment in tw_state_request_start().
105 Add ioctl support for direct ATA command passthru.
106 Add entire aen code string list.
107 1.02.00.010 - Cleanup queueing code, fix jbod thoughput.
108 Fix get_param for specific units.
109 1.02.00.011 - Fix bug in tw_aen_complete() where aen's could be lost.
110 Fix tw_aen_drain_queue() to display useful info at init.
111 Set tw_host->max_id for 12 port cards.
112 Add ioctl support for raw command packet post from userspace
113 with sglist fragments (parameter and io).
114 1.02.00.012 - Fix read capacity to under report by 1 sector to fix get
115 last sector ioctl.
116 1.02.00.013 - Fix bug where more AEN codes weren't coming out during
117 driver initialization.
118 Improved handling of PCI aborts.
119 1.02.00.014 - Fix bug in tw_findcards() where AEN code could be lost.
120 Increase timeout in tw_aen_drain_queue() to 30 seconds.
121 1.02.00.015 - Re-write raw command post with data ioctl method.
122 Remove raid5 bounce buffers for raid5 for 6XXX for kernel 2.5
123 Add tw_map/unmap_scsi_sg/single_data() for kernel 2.5
124 Replace io_request_lock with host_lock for kernel 2.5
125 Set max_cmd_len to 16 for 3dm for kernel 2.5
126 1.02.00.016 - Set host->max_sectors back up to 256.
127 1.02.00.017 - Modified pci parity error handling/clearing from config space
128 during initialization.
129 1.02.00.018 - Better handling of request sense opcode and sense information
130 for failed commands. Add tw_decode_sense().
131 Replace all mdelay()'s with scsi_sleep().
132 1.02.00.019 - Revert mdelay's and scsi_sleep's, this caused problems on
133 some SMP systems.
134 1.02.00.020 - Add pci_set_dma_mask(), rewrite kmalloc()/virt_to_bus() to
135 pci_alloc/free_consistent().
136 Better alignment checking in tw_allocate_memory().
137 Cleanup tw_initialize_device_extension().
138 1.02.00.021 - Bump cmd_per_lun in SHT to 255 for better jbod performance.
139 Improve handling of errors in tw_interrupt().
140 Add handling/clearing of controller queue error.
141 Empty stale responses before draining aen queue.
142 Fix tw_scsi_eh_abort() to not reset on every io abort.
143 Set can_queue in SHT to 255 to prevent hang from AEN.
144 1.02.00.022 - Fix possible null pointer dereference in tw_scsi_release().
145 1.02.00.023 - Fix bug in tw_aen_drain_queue() where unit # was always zero.
146 1.02.00.024 - Add severity levels to AEN strings.
147 1.02.00.025 - Fix command interrupt spurious error messages.
148 Fix bug in raw command post with data ioctl method.
149 Fix bug where rollcall sometimes failed with cable errors.
150 Print unit # on all command timeouts.
151 1.02.00.026 - Fix possible infinite retry bug with power glitch induced
152 drive timeouts.
153 Cleanup some AEN severity levels.
154 1.02.00.027 - Add drive not supported AEN code for SATA controllers.
155 Remove spurious unknown ioctl error message.
156 1.02.00.028 - Fix bug where multiple controllers with no units were the
157 same card number.
158 Fix bug where cards were being shut down more than once.
159 1.02.00.029 - Add missing pci_free_consistent() in tw_allocate_memory().
160 Replace pci_map_single() with pci_map_page() for highmem.
161 Check for tw_setfeature() failure.
162 1.02.00.030 - Make driver 64-bit clean.
163 1.02.00.031 - Cleanup polling timeouts/routines in several places.
164 Add support for mode sense opcode.
165 Add support for cache mode page.
166 Add support for synchronize cache opcode.
167 1.02.00.032 - Fix small multicard rollcall bug.
168 Make driver stay loaded with no units for hot add/swap.
169 Add support for "twe" character device for ioctls.
170 Clean up request_id queueing code.
171 Fix tw_scsi_queue() spinlocks.
172 1.02.00.033 - Fix tw_aen_complete() to not queue 'queue empty' AEN's.
173 Initialize queues correctly when loading with no valid units.
174 1.02.00.034 - Fix tw_decode_bits() to handle multiple errors.
175 Add support for user configurable cmd_per_lun.
176 Add support for sht->slave_configure().
177 1.02.00.035 - Improve tw_allocate_memory() memory allocation.
178 Fix tw_chrdev_ioctl() to sleep correctly.
179 1.02.00.036 - Increase character ioctl timeout to 60 seconds.
180 1.02.00.037 - Fix tw_ioctl() to handle all non-data ATA passthru cmds
181 for 'smartmontools' support.
182 1.26.00.038 - Roll driver minor version to 26 to denote kernel 2.6.
183 Add support for cmds_per_lun module parameter.
184 1.26.00.039 - Fix bug in tw_chrdev_ioctl() polling code.
185 Fix data_buffer_length usage in tw_chrdev_ioctl().
186 Update contact information.
187 1.26.02.000 - Convert driver to pci_driver format.
188 1.26.02.001 - Increase max ioctl buffer size to 512 sectors.
189 Make tw_scsi_queue() return 0 for 'Unknown scsi opcode'.
190 Fix tw_remove() to free irq handler/unregister_chrdev()
191 before shutting down card.
192 Change to new 'change_queue_depth' api.
193 Fix 'handled=1' ISR usage, remove bogus IRQ check.
194 1.26.02.002 - Free irq handler in __tw_shutdown().
195 Turn on RCD bit for caching mode page.
196 Serialize reset code.
197 1.26.02.003 - Force 60 second timeout default.
198 */
199
200 #include <linux/module.h>
201 #include <linux/reboot.h>
202 #include <linux/spinlock.h>
203 #include <linux/interrupt.h>
204 #include <linux/moduleparam.h>
205 #include <linux/errno.h>
206 #include <linux/types.h>
207 #include <linux/delay.h>
208 #include <linux/gfp.h>
209 #include <linux/pci.h>
210 #include <linux/time.h>
211 #include <linux/mutex.h>
212 #include <asm/io.h>
213 #include <asm/irq.h>
214 #include <asm/uaccess.h>
215 #include <scsi/scsi.h>
216 #include <scsi/scsi_host.h>
217 #include <scsi/scsi_tcq.h>
218 #include <scsi/scsi_cmnd.h>
219 #include <scsi/scsi_eh.h>
220 #include "3w-xxxx.h"
221
222 /* Globals */
223 #define TW_DRIVER_VERSION "1.26.02.003"
224 static DEFINE_MUTEX(tw_mutex);
225 static TW_Device_Extension *tw_device_extension_list[TW_MAX_SLOT];
226 static int tw_device_extension_count = 0;
227 static int twe_major = -1;
228
229 /* Module parameters */
230 MODULE_AUTHOR("LSI");
231 MODULE_DESCRIPTION("3ware Storage Controller Linux Driver");
232 MODULE_LICENSE("GPL");
233 MODULE_VERSION(TW_DRIVER_VERSION);
234
235 /* Function prototypes */
236 static int tw_reset_device_extension(TW_Device_Extension *tw_dev);
237
238 /* Functions */
239
240 /* This function will check the status register for unexpected bits */
241 static int tw_check_bits(u32 status_reg_value)
242 {
243 if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS) {
244 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): No expected bits (0x%x).\n", status_reg_value);
245 return 1;
246 }
247 if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0) {
248 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): Found unexpected bits (0x%x).\n", status_reg_value);
249 return 1;
250 }
251
252 return 0;
253 } /* End tw_check_bits() */
254
255 /* This function will print readable messages from status register errors */
256 static int tw_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value, int print_host)
257 {
258 char host[16];
259
260 dprintk(KERN_WARNING "3w-xxxx: tw_decode_bits()\n");
261
262 if (print_host)
263 sprintf(host, " scsi%d:", tw_dev->host->host_no);
264 else
265 host[0] = '\0';
266
267 if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) {
268 printk(KERN_WARNING "3w-xxxx:%s PCI Parity Error: clearing.\n", host);
269 outl(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
270 }
271
272 if (status_reg_value & TW_STATUS_PCI_ABORT) {
273 printk(KERN_WARNING "3w-xxxx:%s PCI Abort: clearing.\n", host);
274 outl(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev));
275 pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT);
276 }
277
278 if (status_reg_value & TW_STATUS_QUEUE_ERROR) {
279 printk(KERN_WARNING "3w-xxxx:%s Controller Queue Error: clearing.\n", host);
280 outl(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
281 }
282
283 if (status_reg_value & TW_STATUS_SBUF_WRITE_ERROR) {
284 printk(KERN_WARNING "3w-xxxx:%s SBUF Write Error: clearing.\n", host);
285 outl(TW_CONTROL_CLEAR_SBUF_WRITE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
286 }
287
288 if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
289 if (tw_dev->reset_print == 0) {
290 printk(KERN_WARNING "3w-xxxx:%s Microcontroller Error: clearing.\n", host);
291 tw_dev->reset_print = 1;
292 }
293 return 1;
294 }
295
296 return 0;
297 } /* End tw_decode_bits() */
298
299 /* This function will poll the status register for a flag */
300 static int tw_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds)
301 {
302 u32 status_reg_value;
303 unsigned long before;
304 int retval = 1;
305
306 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
307 before = jiffies;
308
309 if (tw_check_bits(status_reg_value))
310 tw_decode_bits(tw_dev, status_reg_value, 0);
311
312 while ((status_reg_value & flag) != flag) {
313 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
314
315 if (tw_check_bits(status_reg_value))
316 tw_decode_bits(tw_dev, status_reg_value, 0);
317
318 if (time_after(jiffies, before + HZ * seconds))
319 goto out;
320
321 msleep(50);
322 }
323 retval = 0;
324 out:
325 return retval;
326 } /* End tw_poll_status() */
327
328 /* This function will poll the status register for disappearance of a flag */
329 static int tw_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds)
330 {
331 u32 status_reg_value;
332 unsigned long before;
333 int retval = 1;
334
335 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
336 before = jiffies;
337
338 if (tw_check_bits(status_reg_value))
339 tw_decode_bits(tw_dev, status_reg_value, 0);
340
341 while ((status_reg_value & flag) != 0) {
342 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
343
344 if (tw_check_bits(status_reg_value))
345 tw_decode_bits(tw_dev, status_reg_value, 0);
346
347 if (time_after(jiffies, before + HZ * seconds))
348 goto out;
349
350 msleep(50);
351 }
352 retval = 0;
353 out:
354 return retval;
355 } /* End tw_poll_status_gone() */
356
357 /* This function will attempt to post a command packet to the board */
358 static int tw_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
359 {
360 u32 status_reg_value;
361 unsigned long command_que_value;
362
363 dprintk(KERN_NOTICE "3w-xxxx: tw_post_command_packet()\n");
364 command_que_value = tw_dev->command_packet_physical_address[request_id];
365 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
366
367 if (tw_check_bits(status_reg_value)) {
368 dprintk(KERN_WARNING "3w-xxxx: tw_post_command_packet(): Unexpected bits.\n");
369 tw_decode_bits(tw_dev, status_reg_value, 1);
370 }
371
372 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
373 /* We successfully posted the command packet */
374 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
375 tw_dev->state[request_id] = TW_S_POSTED;
376 tw_dev->posted_request_count++;
377 if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) {
378 tw_dev->max_posted_request_count = tw_dev->posted_request_count;
379 }
380 } else {
381 /* Couldn't post the command packet, so we do it in the isr */
382 if (tw_dev->state[request_id] != TW_S_PENDING) {
383 tw_dev->state[request_id] = TW_S_PENDING;
384 tw_dev->pending_request_count++;
385 if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) {
386 tw_dev->max_pending_request_count = tw_dev->pending_request_count;
387 }
388 tw_dev->pending_queue[tw_dev->pending_tail] = request_id;
389 if (tw_dev->pending_tail == TW_Q_LENGTH-1) {
390 tw_dev->pending_tail = TW_Q_START;
391 } else {
392 tw_dev->pending_tail = tw_dev->pending_tail + 1;
393 }
394 }
395 TW_UNMASK_COMMAND_INTERRUPT(tw_dev);
396 return 1;
397 }
398 return 0;
399 } /* End tw_post_command_packet() */
400
401 /* This function will return valid sense buffer information for failed cmds */
402 static int tw_decode_sense(TW_Device_Extension *tw_dev, int request_id, int fill_sense)
403 {
404 int i;
405 TW_Command *command;
406
407 dprintk(KERN_WARNING "3w-xxxx: tw_decode_sense()\n");
408 command = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
409
410 printk(KERN_WARNING "3w-xxxx: scsi%d: Command failed: status = 0x%x, flags = 0x%x, unit #%d.\n", tw_dev->host->host_no, command->status, command->flags, TW_UNIT_OUT(command->unit__hostid));
411
412 /* Attempt to return intelligent sense information */
413 if (fill_sense) {
414 if ((command->status == 0xc7) || (command->status == 0xcb)) {
415 for (i = 0; i < ARRAY_SIZE(tw_sense_table); i++) {
416 if (command->flags == tw_sense_table[i][0]) {
417
418 /* Valid bit and 'current errors' */
419 tw_dev->srb[request_id]->sense_buffer[0] = (0x1 << 7 | 0x70);
420
421 /* Sense key */
422 tw_dev->srb[request_id]->sense_buffer[2] = tw_sense_table[i][1];
423
424 /* Additional sense length */
425 tw_dev->srb[request_id]->sense_buffer[7] = 0xa; /* 10 bytes */
426
427 /* Additional sense code */
428 tw_dev->srb[request_id]->sense_buffer[12] = tw_sense_table[i][2];
429
430 /* Additional sense code qualifier */
431 tw_dev->srb[request_id]->sense_buffer[13] = tw_sense_table[i][3];
432
433 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
434 return TW_ISR_DONT_RESULT; /* Special case for isr to not over-write result */
435 }
436 }
437 }
438
439 /* If no table match, error so we get a reset */
440 return 1;
441 }
442
443 return 0;
444 } /* End tw_decode_sense() */
445
446 /* This function will report controller error status */
447 static int tw_check_errors(TW_Device_Extension *tw_dev)
448 {
449 u32 status_reg_value;
450
451 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
452
453 if (TW_STATUS_ERRORS(status_reg_value) || tw_check_bits(status_reg_value)) {
454 tw_decode_bits(tw_dev, status_reg_value, 0);
455 return 1;
456 }
457
458 return 0;
459 } /* End tw_check_errors() */
460
461 /* This function will empty the response que */
462 static void tw_empty_response_que(TW_Device_Extension *tw_dev)
463 {
464 u32 status_reg_value, response_que_value;
465
466 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
467
468 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
469 response_que_value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
470 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
471 }
472 } /* End tw_empty_response_que() */
473
474 /* This function will free a request_id */
475 static void tw_state_request_finish(TW_Device_Extension *tw_dev, int request_id)
476 {
477 tw_dev->free_queue[tw_dev->free_tail] = request_id;
478 tw_dev->state[request_id] = TW_S_FINISHED;
479 tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
480 } /* End tw_state_request_finish() */
481
482 /* This function will assign an available request_id */
483 static void tw_state_request_start(TW_Device_Extension *tw_dev, int *request_id)
484 {
485 *request_id = tw_dev->free_queue[tw_dev->free_head];
486 tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
487 tw_dev->state[*request_id] = TW_S_STARTED;
488 } /* End tw_state_request_start() */
489
490 /* Show some statistics about the card */
491 static ssize_t tw_show_stats(struct device *dev, struct device_attribute *attr,
492 char *buf)
493 {
494 struct Scsi_Host *host = class_to_shost(dev);
495 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
496 unsigned long flags = 0;
497 ssize_t len;
498
499 spin_lock_irqsave(tw_dev->host->host_lock, flags);
500 len = snprintf(buf, PAGE_SIZE, "3w-xxxx Driver version: %s\n"
501 "Current commands posted: %4d\n"
502 "Max commands posted: %4d\n"
503 "Current pending commands: %4d\n"
504 "Max pending commands: %4d\n"
505 "Last sgl length: %4d\n"
506 "Max sgl length: %4d\n"
507 "Last sector count: %4d\n"
508 "Max sector count: %4d\n"
509 "SCSI Host Resets: %4d\n"
510 "AEN's: %4d\n",
511 TW_DRIVER_VERSION,
512 tw_dev->posted_request_count,
513 tw_dev->max_posted_request_count,
514 tw_dev->pending_request_count,
515 tw_dev->max_pending_request_count,
516 tw_dev->sgl_entries,
517 tw_dev->max_sgl_entries,
518 tw_dev->sector_count,
519 tw_dev->max_sector_count,
520 tw_dev->num_resets,
521 tw_dev->aen_count);
522 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
523 return len;
524 } /* End tw_show_stats() */
525
526 /* This function will set a devices queue depth */
527 static int tw_change_queue_depth(struct scsi_device *sdev, int queue_depth,
528 int reason)
529 {
530 if (reason != SCSI_QDEPTH_DEFAULT)
531 return -EOPNOTSUPP;
532
533 if (queue_depth > TW_Q_LENGTH-2)
534 queue_depth = TW_Q_LENGTH-2;
535 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
536 return queue_depth;
537 } /* End tw_change_queue_depth() */
538
539 /* Create sysfs 'stats' entry */
540 static struct device_attribute tw_host_stats_attr = {
541 .attr = {
542 .name = "stats",
543 .mode = S_IRUGO,
544 },
545 .show = tw_show_stats
546 };
547
548 /* Host attributes initializer */
549 static struct device_attribute *tw_host_attrs[] = {
550 &tw_host_stats_attr,
551 NULL,
552 };
553
554 /* This function will read the aen queue from the isr */
555 static int tw_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
556 {
557 TW_Command *command_packet;
558 TW_Param *param;
559 unsigned long command_que_value;
560 u32 status_reg_value;
561 unsigned long param_value = 0;
562
563 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_read_queue()\n");
564
565 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
566 if (tw_check_bits(status_reg_value)) {
567 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Unexpected bits.\n");
568 tw_decode_bits(tw_dev, status_reg_value, 1);
569 return 1;
570 }
571 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
572 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet virtual address.\n");
573 return 1;
574 }
575 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
576 memset(command_packet, 0, sizeof(TW_Sector));
577 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
578 command_packet->size = 4;
579 command_packet->request_id = request_id;
580 command_packet->status = 0;
581 command_packet->flags = 0;
582 command_packet->byte6.parameter_count = 1;
583 command_que_value = tw_dev->command_packet_physical_address[request_id];
584 if (command_que_value == 0) {
585 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet physical address.\n");
586 return 1;
587 }
588 /* Now setup the param */
589 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
590 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment virtual address.\n");
591 return 1;
592 }
593 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
594 memset(param, 0, sizeof(TW_Sector));
595 param->table_id = 0x401; /* AEN table */
596 param->parameter_id = 2; /* Unit code */
597 param->parameter_size_bytes = 2;
598 param_value = tw_dev->alignment_physical_address[request_id];
599 if (param_value == 0) {
600 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment physical address.\n");
601 return 1;
602 }
603 command_packet->byte8.param.sgl[0].address = param_value;
604 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
605
606 /* Now post the command packet */
607 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
608 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post succeeded.\n");
609 tw_dev->srb[request_id] = NULL; /* Flag internal command */
610 tw_dev->state[request_id] = TW_S_POSTED;
611 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
612 } else {
613 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post failed, will retry.\n");
614 return 1;
615 }
616
617 return 0;
618 } /* End tw_aen_read_queue() */
619
620 /* This function will complete an aen request from the isr */
621 static int tw_aen_complete(TW_Device_Extension *tw_dev, int request_id)
622 {
623 TW_Param *param;
624 unsigned short aen;
625 int error = 0, table_max = 0;
626
627 dprintk(KERN_WARNING "3w-xxxx: tw_aen_complete()\n");
628 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
629 printk(KERN_WARNING "3w-xxxx: tw_aen_complete(): Bad alignment virtual address.\n");
630 return 1;
631 }
632 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
633 aen = *(unsigned short *)(param->data);
634 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_complete(): Queue'd code 0x%x\n", aen);
635
636 /* Print some useful info when certain aen codes come out */
637 if (aen == 0x0ff) {
638 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: INFO: AEN queue overflow.\n", tw_dev->host->host_no);
639 } else {
640 table_max = ARRAY_SIZE(tw_aen_string);
641 if ((aen & 0x0ff) < table_max) {
642 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
643 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s%d.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff], aen >> 8);
644 } else {
645 if (aen != 0x0)
646 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff]);
647 }
648 } else {
649 printk(KERN_WARNING "3w-xxxx: scsi%d: Received AEN %d.\n", tw_dev->host->host_no, aen);
650 }
651 }
652 if (aen != TW_AEN_QUEUE_EMPTY) {
653 tw_dev->aen_count++;
654
655 /* Now queue the code */
656 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
657 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
658 tw_dev->aen_tail = TW_Q_START;
659 } else {
660 tw_dev->aen_tail = tw_dev->aen_tail + 1;
661 }
662 if (tw_dev->aen_head == tw_dev->aen_tail) {
663 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
664 tw_dev->aen_head = TW_Q_START;
665 } else {
666 tw_dev->aen_head = tw_dev->aen_head + 1;
667 }
668 }
669
670 error = tw_aen_read_queue(tw_dev, request_id);
671 if (error) {
672 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing AEN.\n", tw_dev->host->host_no);
673 tw_dev->state[request_id] = TW_S_COMPLETED;
674 tw_state_request_finish(tw_dev, request_id);
675 }
676 } else {
677 tw_dev->state[request_id] = TW_S_COMPLETED;
678 tw_state_request_finish(tw_dev, request_id);
679 }
680
681 return 0;
682 } /* End tw_aen_complete() */
683
684 /* This function will drain the aen queue after a soft reset */
685 static int tw_aen_drain_queue(TW_Device_Extension *tw_dev)
686 {
687 TW_Command *command_packet;
688 TW_Param *param;
689 int request_id = 0;
690 unsigned long command_que_value;
691 unsigned long param_value;
692 TW_Response_Queue response_queue;
693 unsigned short aen;
694 unsigned short aen_code;
695 int finished = 0;
696 int first_reset = 0;
697 int queue = 0;
698 int found = 0, table_max = 0;
699
700 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_drain_queue()\n");
701
702 if (tw_poll_status(tw_dev, TW_STATUS_ATTENTION_INTERRUPT | TW_STATUS_MICROCONTROLLER_READY, 30)) {
703 dprintk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): No attention interrupt for card %d.\n", tw_device_extension_count);
704 return 1;
705 }
706 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
707
708 /* Empty response queue */
709 tw_empty_response_que(tw_dev);
710
711 /* Initialize command packet */
712 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
713 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet virtual address.\n");
714 return 1;
715 }
716 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
717 memset(command_packet, 0, sizeof(TW_Sector));
718 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
719 command_packet->size = 4;
720 command_packet->request_id = request_id;
721 command_packet->status = 0;
722 command_packet->flags = 0;
723 command_packet->byte6.parameter_count = 1;
724 command_que_value = tw_dev->command_packet_physical_address[request_id];
725 if (command_que_value == 0) {
726 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet physical address.\n");
727 return 1;
728 }
729
730 /* Now setup the param */
731 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
732 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment virtual address.\n");
733 return 1;
734 }
735 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
736 memset(param, 0, sizeof(TW_Sector));
737 param->table_id = 0x401; /* AEN table */
738 param->parameter_id = 2; /* Unit code */
739 param->parameter_size_bytes = 2;
740 param_value = tw_dev->alignment_physical_address[request_id];
741 if (param_value == 0) {
742 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment physical address.\n");
743 return 1;
744 }
745 command_packet->byte8.param.sgl[0].address = param_value;
746 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
747
748 /* Now drain the controller's aen queue */
749 do {
750 /* Post command packet */
751 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
752
753 /* Now poll for completion */
754 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
755 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
756 request_id = TW_RESID_OUT(response_queue.response_id);
757
758 if (request_id != 0) {
759 /* Unexpected request id */
760 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Unexpected request id.\n");
761 return 1;
762 }
763
764 if (command_packet->status != 0) {
765 if (command_packet->flags != TW_AEN_TABLE_UNDEFINED) {
766 /* Bad response */
767 tw_decode_sense(tw_dev, request_id, 0);
768 return 1;
769 } else {
770 /* We know this is a 3w-1x00, and doesn't support aen's */
771 return 0;
772 }
773 }
774
775 /* Now check the aen */
776 aen = *(unsigned short *)(param->data);
777 aen_code = (aen & 0x0ff);
778 queue = 0;
779 switch (aen_code) {
780 case TW_AEN_QUEUE_EMPTY:
781 dprintk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
782 if (first_reset != 1) {
783 return 1;
784 } else {
785 finished = 1;
786 }
787 break;
788 case TW_AEN_SOFT_RESET:
789 if (first_reset == 0) {
790 first_reset = 1;
791 } else {
792 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
793 tw_dev->aen_count++;
794 queue = 1;
795 }
796 break;
797 default:
798 if (aen == 0x0ff) {
799 printk(KERN_WARNING "3w-xxxx: AEN: INFO: AEN queue overflow.\n");
800 } else {
801 table_max = ARRAY_SIZE(tw_aen_string);
802 if ((aen & 0x0ff) < table_max) {
803 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
804 printk(KERN_WARNING "3w-xxxx: AEN: %s%d.\n", tw_aen_string[aen & 0xff], aen >> 8);
805 } else {
806 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
807 }
808 } else
809 printk(KERN_WARNING "3w-xxxx: Received AEN %d.\n", aen);
810 }
811 tw_dev->aen_count++;
812 queue = 1;
813 }
814
815 /* Now put the aen on the aen_queue */
816 if (queue == 1) {
817 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
818 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
819 tw_dev->aen_tail = TW_Q_START;
820 } else {
821 tw_dev->aen_tail = tw_dev->aen_tail + 1;
822 }
823 if (tw_dev->aen_head == tw_dev->aen_tail) {
824 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
825 tw_dev->aen_head = TW_Q_START;
826 } else {
827 tw_dev->aen_head = tw_dev->aen_head + 1;
828 }
829 }
830 }
831 found = 1;
832 }
833 if (found == 0) {
834 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Response never received.\n");
835 return 1;
836 }
837 } while (finished == 0);
838
839 return 0;
840 } /* End tw_aen_drain_queue() */
841
842 /* This function will allocate memory */
843 static int tw_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
844 {
845 int i;
846 dma_addr_t dma_handle;
847 unsigned long *cpu_addr = NULL;
848
849 dprintk(KERN_NOTICE "3w-xxxx: tw_allocate_memory()\n");
850
851 cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
852 if (cpu_addr == NULL) {
853 printk(KERN_WARNING "3w-xxxx: pci_alloc_consistent() failed.\n");
854 return 1;
855 }
856
857 if ((unsigned long)cpu_addr % (tw_dev->tw_pci_dev->device == TW_DEVICE_ID ? TW_ALIGNMENT_6000 : TW_ALIGNMENT_7000)) {
858 printk(KERN_WARNING "3w-xxxx: Couldn't allocate correctly aligned memory.\n");
859 pci_free_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, cpu_addr, dma_handle);
860 return 1;
861 }
862
863 memset(cpu_addr, 0, size*TW_Q_LENGTH);
864
865 for (i=0;i<TW_Q_LENGTH;i++) {
866 switch(which) {
867 case 0:
868 tw_dev->command_packet_physical_address[i] = dma_handle+(i*size);
869 tw_dev->command_packet_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
870 break;
871 case 1:
872 tw_dev->alignment_physical_address[i] = dma_handle+(i*size);
873 tw_dev->alignment_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
874 break;
875 default:
876 printk(KERN_WARNING "3w-xxxx: tw_allocate_memory(): case slip in tw_allocate_memory()\n");
877 return 1;
878 }
879 }
880
881 return 0;
882 } /* End tw_allocate_memory() */
883
884 /* This function handles ioctl for the character device */
885 static long tw_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
886 {
887 int request_id;
888 dma_addr_t dma_handle;
889 unsigned short tw_aen_code;
890 unsigned long flags;
891 unsigned int data_buffer_length = 0;
892 unsigned long data_buffer_length_adjusted = 0;
893 struct inode *inode = file_inode(file);
894 unsigned long *cpu_addr;
895 long timeout;
896 TW_New_Ioctl *tw_ioctl;
897 TW_Passthru *passthru;
898 TW_Device_Extension *tw_dev = tw_device_extension_list[iminor(inode)];
899 int retval = -EFAULT;
900 void __user *argp = (void __user *)arg;
901
902 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl()\n");
903
904 mutex_lock(&tw_mutex);
905 /* Only let one of these through at a time */
906 if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
907 mutex_unlock(&tw_mutex);
908 return -EINTR;
909 }
910
911 /* First copy down the buffer length */
912 if (copy_from_user(&data_buffer_length, argp, sizeof(unsigned int)))
913 goto out;
914
915 /* Check size */
916 if (data_buffer_length > TW_MAX_IOCTL_SECTORS * 512) {
917 retval = -EINVAL;
918 goto out;
919 }
920
921 /* Hardware can only do multiple of 512 byte transfers */
922 data_buffer_length_adjusted = (data_buffer_length + 511) & ~511;
923
924 /* Now allocate ioctl buf memory */
925 cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, &dma_handle, GFP_KERNEL);
926 if (cpu_addr == NULL) {
927 retval = -ENOMEM;
928 goto out;
929 }
930
931 tw_ioctl = (TW_New_Ioctl *)cpu_addr;
932
933 /* Now copy down the entire ioctl */
934 if (copy_from_user(tw_ioctl, argp, data_buffer_length + sizeof(TW_New_Ioctl) - 1))
935 goto out2;
936
937 passthru = (TW_Passthru *)&tw_ioctl->firmware_command;
938
939 /* See which ioctl we are doing */
940 switch (cmd) {
941 case TW_OP_NOP:
942 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_OP_NOP.\n");
943 break;
944 case TW_OP_AEN_LISTEN:
945 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_AEN_LISTEN.\n");
946 memset(tw_ioctl->data_buffer, 0, data_buffer_length);
947
948 spin_lock_irqsave(tw_dev->host->host_lock, flags);
949 if (tw_dev->aen_head == tw_dev->aen_tail) {
950 tw_aen_code = TW_AEN_QUEUE_EMPTY;
951 } else {
952 tw_aen_code = tw_dev->aen_queue[tw_dev->aen_head];
953 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
954 tw_dev->aen_head = TW_Q_START;
955 } else {
956 tw_dev->aen_head = tw_dev->aen_head + 1;
957 }
958 }
959 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
960 memcpy(tw_ioctl->data_buffer, &tw_aen_code, sizeof(tw_aen_code));
961 break;
962 case TW_CMD_PACKET_WITH_DATA:
963 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_CMD_PACKET_WITH_DATA.\n");
964 spin_lock_irqsave(tw_dev->host->host_lock, flags);
965
966 tw_state_request_start(tw_dev, &request_id);
967
968 /* Flag internal command */
969 tw_dev->srb[request_id] = NULL;
970
971 /* Flag chrdev ioctl */
972 tw_dev->chrdev_request_id = request_id;
973
974 tw_ioctl->firmware_command.request_id = request_id;
975
976 /* Load the sg list */
977 switch (TW_SGL_OUT(tw_ioctl->firmware_command.opcode__sgloffset)) {
978 case 2:
979 tw_ioctl->firmware_command.byte8.param.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
980 tw_ioctl->firmware_command.byte8.param.sgl[0].length = data_buffer_length_adjusted;
981 break;
982 case 3:
983 tw_ioctl->firmware_command.byte8.io.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
984 tw_ioctl->firmware_command.byte8.io.sgl[0].length = data_buffer_length_adjusted;
985 break;
986 case 5:
987 passthru->sg_list[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
988 passthru->sg_list[0].length = data_buffer_length_adjusted;
989 break;
990 }
991
992 memcpy(tw_dev->command_packet_virtual_address[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command));
993
994 /* Now post the command packet to the controller */
995 tw_post_command_packet(tw_dev, request_id);
996 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
997
998 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
999
1000 /* Now wait for the command to complete */
1001 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
1002
1003 /* We timed out, and didn't get an interrupt */
1004 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
1005 /* Now we need to reset the board */
1006 printk(KERN_WARNING "3w-xxxx: scsi%d: Character ioctl (0x%x) timed out, resetting card.\n", tw_dev->host->host_no, cmd);
1007 retval = -EIO;
1008 if (tw_reset_device_extension(tw_dev)) {
1009 printk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): Reset failed for card %d.\n", tw_dev->host->host_no);
1010 }
1011 goto out2;
1012 }
1013
1014 /* Now copy in the command packet response */
1015 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virtual_address[request_id], sizeof(TW_Command));
1016
1017 /* Now complete the io */
1018 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1019 tw_dev->posted_request_count--;
1020 tw_dev->state[request_id] = TW_S_COMPLETED;
1021 tw_state_request_finish(tw_dev, request_id);
1022 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1023 break;
1024 default:
1025 retval = -ENOTTY;
1026 goto out2;
1027 }
1028
1029 /* Now copy the response to userspace */
1030 if (copy_to_user(argp, tw_ioctl, sizeof(TW_New_Ioctl) + data_buffer_length - 1))
1031 goto out2;
1032 retval = 0;
1033 out2:
1034 /* Now free ioctl buf memory */
1035 dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, cpu_addr, dma_handle);
1036 out:
1037 mutex_unlock(&tw_dev->ioctl_lock);
1038 mutex_unlock(&tw_mutex);
1039 return retval;
1040 } /* End tw_chrdev_ioctl() */
1041
1042 /* This function handles open for the character device */
1043 /* NOTE that this function races with remove. */
1044 static int tw_chrdev_open(struct inode *inode, struct file *file)
1045 {
1046 unsigned int minor_number;
1047
1048 dprintk(KERN_WARNING "3w-xxxx: tw_ioctl_open()\n");
1049
1050 minor_number = iminor(inode);
1051 if (minor_number >= tw_device_extension_count)
1052 return -ENODEV;
1053
1054 return 0;
1055 } /* End tw_chrdev_open() */
1056
1057 /* File operations struct for character device */
1058 static const struct file_operations tw_fops = {
1059 .owner = THIS_MODULE,
1060 .unlocked_ioctl = tw_chrdev_ioctl,
1061 .open = tw_chrdev_open,
1062 .release = NULL,
1063 .llseek = noop_llseek,
1064 };
1065
1066 /* This function will free up device extension resources */
1067 static void tw_free_device_extension(TW_Device_Extension *tw_dev)
1068 {
1069 dprintk(KERN_NOTICE "3w-xxxx: tw_free_device_extension()\n");
1070
1071 /* Free command packet and generic buffer memory */
1072 if (tw_dev->command_packet_virtual_address[0])
1073 pci_free_consistent(tw_dev->tw_pci_dev, sizeof(TW_Command)*TW_Q_LENGTH, tw_dev->command_packet_virtual_address[0], tw_dev->command_packet_physical_address[0]);
1074
1075 if (tw_dev->alignment_virtual_address[0])
1076 pci_free_consistent(tw_dev->tw_pci_dev, sizeof(TW_Sector)*TW_Q_LENGTH, tw_dev->alignment_virtual_address[0], tw_dev->alignment_physical_address[0]);
1077 } /* End tw_free_device_extension() */
1078
1079 /* This function will send an initconnection command to controller */
1080 static int tw_initconnection(TW_Device_Extension *tw_dev, int message_credits)
1081 {
1082 unsigned long command_que_value;
1083 TW_Command *command_packet;
1084 TW_Response_Queue response_queue;
1085 int request_id = 0;
1086
1087 dprintk(KERN_NOTICE "3w-xxxx: tw_initconnection()\n");
1088
1089 /* Initialize InitConnection command packet */
1090 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1091 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet virtual address.\n");
1092 return 1;
1093 }
1094
1095 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1096 memset(command_packet, 0, sizeof(TW_Sector));
1097 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_INIT_CONNECTION);
1098 command_packet->size = TW_INIT_COMMAND_PACKET_SIZE;
1099 command_packet->request_id = request_id;
1100 command_packet->status = 0x0;
1101 command_packet->flags = 0x0;
1102 command_packet->byte6.message_credits = message_credits;
1103 command_packet->byte8.init_connection.response_queue_pointer = 0x0;
1104 command_que_value = tw_dev->command_packet_physical_address[request_id];
1105
1106 if (command_que_value == 0) {
1107 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet physical address.\n");
1108 return 1;
1109 }
1110
1111 /* Send command packet to the board */
1112 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1113
1114 /* Poll for completion */
1115 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1116 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1117 request_id = TW_RESID_OUT(response_queue.response_id);
1118
1119 if (request_id != 0) {
1120 /* unexpected request id */
1121 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Unexpected request id.\n");
1122 return 1;
1123 }
1124 if (command_packet->status != 0) {
1125 /* bad response */
1126 tw_decode_sense(tw_dev, request_id, 0);
1127 return 1;
1128 }
1129 }
1130 return 0;
1131 } /* End tw_initconnection() */
1132
1133 /* Set a value in the features table */
1134 static int tw_setfeature(TW_Device_Extension *tw_dev, int parm, int param_size,
1135 unsigned char *val)
1136 {
1137 TW_Param *param;
1138 TW_Command *command_packet;
1139 TW_Response_Queue response_queue;
1140 int request_id = 0;
1141 unsigned long command_que_value;
1142 unsigned long param_value;
1143
1144 /* Initialize SetParam command packet */
1145 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1146 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet virtual address.\n");
1147 return 1;
1148 }
1149 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1150 memset(command_packet, 0, sizeof(TW_Sector));
1151 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1152
1153 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
1154 param->table_id = 0x404; /* Features table */
1155 param->parameter_id = parm;
1156 param->parameter_size_bytes = param_size;
1157 memcpy(param->data, val, param_size);
1158
1159 param_value = tw_dev->alignment_physical_address[request_id];
1160 if (param_value == 0) {
1161 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad alignment physical address.\n");
1162 tw_dev->state[request_id] = TW_S_COMPLETED;
1163 tw_state_request_finish(tw_dev, request_id);
1164 tw_dev->srb[request_id]->result = (DID_OK << 16);
1165 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1166 }
1167 command_packet->byte8.param.sgl[0].address = param_value;
1168 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1169
1170 command_packet->size = 4;
1171 command_packet->request_id = request_id;
1172 command_packet->byte6.parameter_count = 1;
1173
1174 command_que_value = tw_dev->command_packet_physical_address[request_id];
1175 if (command_que_value == 0) {
1176 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet physical address.\n");
1177 return 1;
1178 }
1179
1180 /* Send command packet to the board */
1181 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1182
1183 /* Poll for completion */
1184 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1185 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1186 request_id = TW_RESID_OUT(response_queue.response_id);
1187
1188 if (request_id != 0) {
1189 /* unexpected request id */
1190 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Unexpected request id.\n");
1191 return 1;
1192 }
1193 if (command_packet->status != 0) {
1194 /* bad response */
1195 tw_decode_sense(tw_dev, request_id, 0);
1196 return 1;
1197 }
1198 }
1199
1200 return 0;
1201 } /* End tw_setfeature() */
1202
1203 /* This function will reset a controller */
1204 static int tw_reset_sequence(TW_Device_Extension *tw_dev)
1205 {
1206 int error = 0;
1207 int tries = 0;
1208 unsigned char c = 1;
1209
1210 /* Reset the board */
1211 while (tries < TW_MAX_RESET_TRIES) {
1212 TW_SOFT_RESET(tw_dev);
1213
1214 error = tw_aen_drain_queue(tw_dev);
1215 if (error) {
1216 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN drain failed, retrying.\n", tw_dev->host->host_no);
1217 tries++;
1218 continue;
1219 }
1220
1221 /* Check for controller errors */
1222 if (tw_check_errors(tw_dev)) {
1223 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors found, retrying.\n", tw_dev->host->host_no);
1224 tries++;
1225 continue;
1226 }
1227
1228 /* Now the controller is in a good state */
1229 break;
1230 }
1231
1232 if (tries >= TW_MAX_RESET_TRIES) {
1233 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors, card not responding, check all cabling.\n", tw_dev->host->host_no);
1234 return 1;
1235 }
1236
1237 error = tw_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS);
1238 if (error) {
1239 printk(KERN_WARNING "3w-xxxx: scsi%d: Connection initialization failed.\n", tw_dev->host->host_no);
1240 return 1;
1241 }
1242
1243 error = tw_setfeature(tw_dev, 2, 1, &c);
1244 if (error) {
1245 printk(KERN_WARNING "3w-xxxx: Unable to set features for card, probable old firmware or card.\n");
1246 }
1247
1248 return 0;
1249 } /* End tw_reset_sequence() */
1250
1251 /* This function will initialize the fields of a device extension */
1252 static int tw_initialize_device_extension(TW_Device_Extension *tw_dev)
1253 {
1254 int i, error=0;
1255
1256 dprintk(KERN_NOTICE "3w-xxxx: tw_initialize_device_extension()\n");
1257
1258 /* Initialize command packet buffers */
1259 error = tw_allocate_memory(tw_dev, sizeof(TW_Command), 0);
1260 if (error) {
1261 printk(KERN_WARNING "3w-xxxx: Command packet memory allocation failed.\n");
1262 return 1;
1263 }
1264
1265 /* Initialize generic buffer */
1266 error = tw_allocate_memory(tw_dev, sizeof(TW_Sector), 1);
1267 if (error) {
1268 printk(KERN_WARNING "3w-xxxx: Generic memory allocation failed.\n");
1269 return 1;
1270 }
1271
1272 for (i=0;i<TW_Q_LENGTH;i++) {
1273 tw_dev->free_queue[i] = i;
1274 tw_dev->state[i] = TW_S_INITIAL;
1275 }
1276
1277 tw_dev->pending_head = TW_Q_START;
1278 tw_dev->pending_tail = TW_Q_START;
1279 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1280
1281 mutex_init(&tw_dev->ioctl_lock);
1282 init_waitqueue_head(&tw_dev->ioctl_wqueue);
1283
1284 return 0;
1285 } /* End tw_initialize_device_extension() */
1286
1287 /* This function will reset a device extension */
1288 static int tw_reset_device_extension(TW_Device_Extension *tw_dev)
1289 {
1290 int i = 0;
1291 struct scsi_cmnd *srb;
1292 unsigned long flags = 0;
1293
1294 dprintk(KERN_NOTICE "3w-xxxx: tw_reset_device_extension()\n");
1295
1296 set_bit(TW_IN_RESET, &tw_dev->flags);
1297 TW_DISABLE_INTERRUPTS(tw_dev);
1298 TW_MASK_COMMAND_INTERRUPT(tw_dev);
1299 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1300
1301 /* Abort all requests that are in progress */
1302 for (i=0;i<TW_Q_LENGTH;i++) {
1303 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1304 (tw_dev->state[i] != TW_S_INITIAL) &&
1305 (tw_dev->state[i] != TW_S_COMPLETED)) {
1306 srb = tw_dev->srb[i];
1307 if (srb != NULL) {
1308 srb->result = (DID_RESET << 16);
1309 scsi_dma_unmap(srb);
1310 srb->scsi_done(srb);
1311 }
1312 }
1313 }
1314
1315 /* Reset queues and counts */
1316 for (i=0;i<TW_Q_LENGTH;i++) {
1317 tw_dev->free_queue[i] = i;
1318 tw_dev->state[i] = TW_S_INITIAL;
1319 }
1320 tw_dev->free_head = TW_Q_START;
1321 tw_dev->free_tail = TW_Q_START;
1322 tw_dev->posted_request_count = 0;
1323 tw_dev->pending_request_count = 0;
1324 tw_dev->pending_head = TW_Q_START;
1325 tw_dev->pending_tail = TW_Q_START;
1326 tw_dev->reset_print = 0;
1327
1328 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1329
1330 if (tw_reset_sequence(tw_dev)) {
1331 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset sequence failed.\n", tw_dev->host->host_no);
1332 return 1;
1333 }
1334
1335 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
1336 clear_bit(TW_IN_RESET, &tw_dev->flags);
1337 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1338
1339 return 0;
1340 } /* End tw_reset_device_extension() */
1341
1342 /* This funciton returns unit geometry in cylinders/heads/sectors */
1343 static int tw_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev,
1344 sector_t capacity, int geom[])
1345 {
1346 int heads, sectors, cylinders;
1347 TW_Device_Extension *tw_dev;
1348
1349 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam()\n");
1350 tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
1351
1352 heads = 64;
1353 sectors = 32;
1354 cylinders = sector_div(capacity, heads * sectors);
1355
1356 if (capacity >= 0x200000) {
1357 heads = 255;
1358 sectors = 63;
1359 cylinders = sector_div(capacity, heads * sectors);
1360 }
1361
1362 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam(): heads = %d, sectors = %d, cylinders = %d\n", heads, sectors, cylinders);
1363 geom[0] = heads;
1364 geom[1] = sectors;
1365 geom[2] = cylinders;
1366
1367 return 0;
1368 } /* End tw_scsi_biosparam() */
1369
1370 /* This is the new scsi eh reset function */
1371 static int tw_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1372 {
1373 TW_Device_Extension *tw_dev=NULL;
1374 int retval = FAILED;
1375
1376 tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1377
1378 tw_dev->num_resets++;
1379
1380 sdev_printk(KERN_WARNING, SCpnt->device,
1381 "WARNING: Command (0x%x) timed out, resetting card.\n",
1382 SCpnt->cmnd[0]);
1383
1384 /* Make sure we are not issuing an ioctl or resetting from ioctl */
1385 mutex_lock(&tw_dev->ioctl_lock);
1386
1387 /* Now reset the card and some of the device extension data */
1388 if (tw_reset_device_extension(tw_dev)) {
1389 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset failed.\n", tw_dev->host->host_no);
1390 goto out;
1391 }
1392
1393 retval = SUCCESS;
1394 out:
1395 mutex_unlock(&tw_dev->ioctl_lock);
1396 return retval;
1397 } /* End tw_scsi_eh_reset() */
1398
1399 /* This function handles scsi inquiry commands */
1400 static int tw_scsiop_inquiry(TW_Device_Extension *tw_dev, int request_id)
1401 {
1402 TW_Param *param;
1403 TW_Command *command_packet;
1404 unsigned long command_que_value;
1405 unsigned long param_value;
1406
1407 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry()\n");
1408
1409 /* Initialize command packet */
1410 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1411 if (command_packet == NULL) {
1412 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet virtual address.\n");
1413 return 1;
1414 }
1415 memset(command_packet, 0, sizeof(TW_Sector));
1416 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1417 command_packet->size = 4;
1418 command_packet->request_id = request_id;
1419 command_packet->status = 0;
1420 command_packet->flags = 0;
1421 command_packet->byte6.parameter_count = 1;
1422
1423 /* Now setup the param */
1424 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1425 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment virtual address.\n");
1426 return 1;
1427 }
1428 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1429 memset(param, 0, sizeof(TW_Sector));
1430 param->table_id = 3; /* unit summary table */
1431 param->parameter_id = 3; /* unitsstatus parameter */
1432 param->parameter_size_bytes = TW_MAX_UNITS;
1433 param_value = tw_dev->alignment_physical_address[request_id];
1434 if (param_value == 0) {
1435 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment physical address.\n");
1436 return 1;
1437 }
1438
1439 command_packet->byte8.param.sgl[0].address = param_value;
1440 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1441 command_que_value = tw_dev->command_packet_physical_address[request_id];
1442 if (command_que_value == 0) {
1443 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet physical address.\n");
1444 return 1;
1445 }
1446
1447 /* Now try to post the command packet */
1448 tw_post_command_packet(tw_dev, request_id);
1449
1450 return 0;
1451 } /* End tw_scsiop_inquiry() */
1452
1453 static void tw_transfer_internal(TW_Device_Extension *tw_dev, int request_id,
1454 void *data, unsigned int len)
1455 {
1456 scsi_sg_copy_from_buffer(tw_dev->srb[request_id], data, len);
1457 }
1458
1459 /* This function is called by the isr to complete an inquiry command */
1460 static int tw_scsiop_inquiry_complete(TW_Device_Extension *tw_dev, int request_id)
1461 {
1462 unsigned char *is_unit_present;
1463 unsigned char request_buffer[36];
1464 TW_Param *param;
1465
1466 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry_complete()\n");
1467
1468 memset(request_buffer, 0, sizeof(request_buffer));
1469 request_buffer[0] = TYPE_DISK; /* Peripheral device type */
1470 request_buffer[1] = 0; /* Device type modifier */
1471 request_buffer[2] = 0; /* No ansi/iso compliance */
1472 request_buffer[4] = 31; /* Additional length */
1473 memcpy(&request_buffer[8], "3ware ", 8); /* Vendor ID */
1474 sprintf(&request_buffer[16], "Logical Disk %-2d ", tw_dev->srb[request_id]->device->id);
1475 memcpy(&request_buffer[32], TW_DRIVER_VERSION, 3);
1476 tw_transfer_internal(tw_dev, request_id, request_buffer,
1477 sizeof(request_buffer));
1478
1479 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1480 if (param == NULL) {
1481 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry_complete(): Bad alignment virtual address.\n");
1482 return 1;
1483 }
1484 is_unit_present = &(param->data[0]);
1485
1486 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1487 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1488 } else {
1489 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1490 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1491 return TW_ISR_DONT_RESULT;
1492 }
1493
1494 return 0;
1495 } /* End tw_scsiop_inquiry_complete() */
1496
1497 /* This function handles scsi mode_sense commands */
1498 static int tw_scsiop_mode_sense(TW_Device_Extension *tw_dev, int request_id)
1499 {
1500 TW_Param *param;
1501 TW_Command *command_packet;
1502 unsigned long command_que_value;
1503 unsigned long param_value;
1504
1505 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense()\n");
1506
1507 /* Only page control = 0, page code = 0x8 (cache page) supported */
1508 if (tw_dev->srb[request_id]->cmnd[2] != 0x8) {
1509 tw_dev->state[request_id] = TW_S_COMPLETED;
1510 tw_state_request_finish(tw_dev, request_id);
1511 tw_dev->srb[request_id]->result = (DID_OK << 16);
1512 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1513 return 0;
1514 }
1515
1516 /* Now read firmware cache setting for this unit */
1517 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1518 if (command_packet == NULL) {
1519 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet virtual address.\n");
1520 return 1;
1521 }
1522
1523 /* Setup the command packet */
1524 memset(command_packet, 0, sizeof(TW_Sector));
1525 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1526 command_packet->size = 4;
1527 command_packet->request_id = request_id;
1528 command_packet->status = 0;
1529 command_packet->flags = 0;
1530 command_packet->byte6.parameter_count = 1;
1531
1532 /* Setup the param */
1533 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1534 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment virtual address.\n");
1535 return 1;
1536 }
1537
1538 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1539 memset(param, 0, sizeof(TW_Sector));
1540 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE + tw_dev->srb[request_id]->device->id;
1541 param->parameter_id = 7; /* unit flags */
1542 param->parameter_size_bytes = 1;
1543 param_value = tw_dev->alignment_physical_address[request_id];
1544 if (param_value == 0) {
1545 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment physical address.\n");
1546 return 1;
1547 }
1548
1549 command_packet->byte8.param.sgl[0].address = param_value;
1550 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1551 command_que_value = tw_dev->command_packet_physical_address[request_id];
1552 if (command_que_value == 0) {
1553 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet physical address.\n");
1554 return 1;
1555 }
1556
1557 /* Now try to post the command packet */
1558 tw_post_command_packet(tw_dev, request_id);
1559
1560 return 0;
1561 } /* End tw_scsiop_mode_sense() */
1562
1563 /* This function is called by the isr to complete a mode sense command */
1564 static int tw_scsiop_mode_sense_complete(TW_Device_Extension *tw_dev, int request_id)
1565 {
1566 TW_Param *param;
1567 unsigned char *flags;
1568 unsigned char request_buffer[8];
1569
1570 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense_complete()\n");
1571
1572 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1573 if (param == NULL) {
1574 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense_complete(): Bad alignment virtual address.\n");
1575 return 1;
1576 }
1577 flags = (char *)&(param->data[0]);
1578 memset(request_buffer, 0, sizeof(request_buffer));
1579
1580 request_buffer[0] = 0xf; /* mode data length */
1581 request_buffer[1] = 0; /* default medium type */
1582 request_buffer[2] = 0x10; /* dpo/fua support on */
1583 request_buffer[3] = 0; /* no block descriptors */
1584 request_buffer[4] = 0x8; /* caching page */
1585 request_buffer[5] = 0xa; /* page length */
1586 if (*flags & 0x1)
1587 request_buffer[6] = 0x5; /* WCE on, RCD on */
1588 else
1589 request_buffer[6] = 0x1; /* WCE off, RCD on */
1590 tw_transfer_internal(tw_dev, request_id, request_buffer,
1591 sizeof(request_buffer));
1592
1593 return 0;
1594 } /* End tw_scsiop_mode_sense_complete() */
1595
1596 /* This function handles scsi read_capacity commands */
1597 static int tw_scsiop_read_capacity(TW_Device_Extension *tw_dev, int request_id)
1598 {
1599 TW_Param *param;
1600 TW_Command *command_packet;
1601 unsigned long command_que_value;
1602 unsigned long param_value;
1603
1604 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity()\n");
1605
1606 /* Initialize command packet */
1607 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1608
1609 if (command_packet == NULL) {
1610 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet virtual address.\n");
1611 return 1;
1612 }
1613 memset(command_packet, 0, sizeof(TW_Sector));
1614 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1615 command_packet->size = 4;
1616 command_packet->request_id = request_id;
1617 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1618 command_packet->status = 0;
1619 command_packet->flags = 0;
1620 command_packet->byte6.block_count = 1;
1621
1622 /* Now setup the param */
1623 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1624 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment virtual address.\n");
1625 return 1;
1626 }
1627 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1628 memset(param, 0, sizeof(TW_Sector));
1629 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE +
1630 tw_dev->srb[request_id]->device->id;
1631 param->parameter_id = 4; /* unitcapacity parameter */
1632 param->parameter_size_bytes = 4;
1633 param_value = tw_dev->alignment_physical_address[request_id];
1634 if (param_value == 0) {
1635 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment physical address.\n");
1636 return 1;
1637 }
1638
1639 command_packet->byte8.param.sgl[0].address = param_value;
1640 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1641 command_que_value = tw_dev->command_packet_physical_address[request_id];
1642 if (command_que_value == 0) {
1643 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet physical address.\n");
1644 return 1;
1645 }
1646
1647 /* Now try to post the command to the board */
1648 tw_post_command_packet(tw_dev, request_id);
1649
1650 return 0;
1651 } /* End tw_scsiop_read_capacity() */
1652
1653 /* This function is called by the isr to complete a readcapacity command */
1654 static int tw_scsiop_read_capacity_complete(TW_Device_Extension *tw_dev, int request_id)
1655 {
1656 unsigned char *param_data;
1657 u32 capacity;
1658 char buff[8];
1659 TW_Param *param;
1660
1661 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete()\n");
1662
1663 memset(buff, 0, sizeof(buff));
1664 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1665 if (param == NULL) {
1666 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_capacity_complete(): Bad alignment virtual address.\n");
1667 return 1;
1668 }
1669 param_data = &(param->data[0]);
1670
1671 capacity = (param_data[3] << 24) | (param_data[2] << 16) |
1672 (param_data[1] << 8) | param_data[0];
1673
1674 /* Subtract one sector to fix get last sector ioctl */
1675 capacity -= 1;
1676
1677 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete(): Capacity = 0x%x.\n", capacity);
1678
1679 /* Number of LBA's */
1680 buff[0] = (capacity >> 24);
1681 buff[1] = (capacity >> 16) & 0xff;
1682 buff[2] = (capacity >> 8) & 0xff;
1683 buff[3] = capacity & 0xff;
1684
1685 /* Block size in bytes (512) */
1686 buff[4] = (TW_BLOCK_SIZE >> 24);
1687 buff[5] = (TW_BLOCK_SIZE >> 16) & 0xff;
1688 buff[6] = (TW_BLOCK_SIZE >> 8) & 0xff;
1689 buff[7] = TW_BLOCK_SIZE & 0xff;
1690
1691 tw_transfer_internal(tw_dev, request_id, buff, sizeof(buff));
1692
1693 return 0;
1694 } /* End tw_scsiop_read_capacity_complete() */
1695
1696 /* This function handles scsi read or write commands */
1697 static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id)
1698 {
1699 TW_Command *command_packet;
1700 unsigned long command_que_value;
1701 u32 lba = 0x0, num_sectors = 0x0;
1702 int i, use_sg;
1703 struct scsi_cmnd *srb;
1704 struct scatterlist *sglist, *sg;
1705
1706 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write()\n");
1707
1708 srb = tw_dev->srb[request_id];
1709
1710 sglist = scsi_sglist(srb);
1711 if (!sglist) {
1712 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Request buffer NULL.\n");
1713 return 1;
1714 }
1715
1716 /* Initialize command packet */
1717 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1718 if (command_packet == NULL) {
1719 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): Bad command packet virtual address.\n");
1720 return 1;
1721 }
1722
1723 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == READ_10) {
1724 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_READ);
1725 } else {
1726 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_WRITE);
1727 }
1728
1729 command_packet->size = 3;
1730 command_packet->request_id = request_id;
1731 command_packet->unit__hostid = TW_UNITHOST_IN(0, srb->device->id);
1732 command_packet->status = 0;
1733 command_packet->flags = 0;
1734
1735 if (srb->cmnd[0] == WRITE_10) {
1736 if ((srb->cmnd[1] & 0x8) || (srb->cmnd[1] & 0x10))
1737 command_packet->flags = 1;
1738 }
1739
1740 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6) {
1741 lba = ((u32)srb->cmnd[1] << 16) | ((u32)srb->cmnd[2] << 8) | (u32)srb->cmnd[3];
1742 num_sectors = (u32)srb->cmnd[4];
1743 } else {
1744 lba = ((u32)srb->cmnd[2] << 24) | ((u32)srb->cmnd[3] << 16) | ((u32)srb->cmnd[4] << 8) | (u32)srb->cmnd[5];
1745 num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
1746 }
1747
1748 /* Update sector statistic */
1749 tw_dev->sector_count = num_sectors;
1750 if (tw_dev->sector_count > tw_dev->max_sector_count)
1751 tw_dev->max_sector_count = tw_dev->sector_count;
1752
1753 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): lba = 0x%x num_sectors = 0x%x\n", lba, num_sectors);
1754 command_packet->byte8.io.lba = lba;
1755 command_packet->byte6.block_count = num_sectors;
1756
1757 use_sg = scsi_dma_map(srb);
1758 if (use_sg <= 0)
1759 return 1;
1760
1761 scsi_for_each_sg(tw_dev->srb[request_id], sg, use_sg, i) {
1762 command_packet->byte8.io.sgl[i].address = sg_dma_address(sg);
1763 command_packet->byte8.io.sgl[i].length = sg_dma_len(sg);
1764 command_packet->size+=2;
1765 }
1766
1767 /* Update SG statistics */
1768 tw_dev->sgl_entries = scsi_sg_count(tw_dev->srb[request_id]);
1769 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
1770 tw_dev->max_sgl_entries = tw_dev->sgl_entries;
1771
1772 command_que_value = tw_dev->command_packet_physical_address[request_id];
1773 if (command_que_value == 0) {
1774 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Bad command packet physical address.\n");
1775 return 1;
1776 }
1777
1778 /* Now try to post the command to the board */
1779 tw_post_command_packet(tw_dev, request_id);
1780
1781 return 0;
1782 } /* End tw_scsiop_read_write() */
1783
1784 /* This function will handle the request sense scsi command */
1785 static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id)
1786 {
1787 char request_buffer[18];
1788
1789 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n");
1790
1791 memset(request_buffer, 0, sizeof(request_buffer));
1792 request_buffer[0] = 0x70; /* Immediate fixed format */
1793 request_buffer[7] = 10; /* minimum size per SPC: 18 bytes */
1794 /* leave all other fields zero, giving effectively NO_SENSE return */
1795 tw_transfer_internal(tw_dev, request_id, request_buffer,
1796 sizeof(request_buffer));
1797
1798 tw_dev->state[request_id] = TW_S_COMPLETED;
1799 tw_state_request_finish(tw_dev, request_id);
1800
1801 /* If we got a request_sense, we probably want a reset, return error */
1802 tw_dev->srb[request_id]->result = (DID_ERROR << 16);
1803 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1804
1805 return 0;
1806 } /* End tw_scsiop_request_sense() */
1807
1808 /* This function will handle synchronize cache scsi command */
1809 static int tw_scsiop_synchronize_cache(TW_Device_Extension *tw_dev, int request_id)
1810 {
1811 TW_Command *command_packet;
1812 unsigned long command_que_value;
1813
1814 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_synchronize_cache()\n");
1815
1816 /* Send firmware flush command for this unit */
1817 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1818 if (command_packet == NULL) {
1819 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet virtual address.\n");
1820 return 1;
1821 }
1822
1823 /* Setup the command packet */
1824 memset(command_packet, 0, sizeof(TW_Sector));
1825 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_FLUSH_CACHE);
1826 command_packet->size = 2;
1827 command_packet->request_id = request_id;
1828 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1829 command_packet->status = 0;
1830 command_packet->flags = 0;
1831 command_packet->byte6.parameter_count = 1;
1832 command_que_value = tw_dev->command_packet_physical_address[request_id];
1833 if (command_que_value == 0) {
1834 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet physical address.\n");
1835 return 1;
1836 }
1837
1838 /* Now try to post the command packet */
1839 tw_post_command_packet(tw_dev, request_id);
1840
1841 return 0;
1842 } /* End tw_scsiop_synchronize_cache() */
1843
1844 /* This function will handle test unit ready scsi command */
1845 static int tw_scsiop_test_unit_ready(TW_Device_Extension *tw_dev, int request_id)
1846 {
1847 TW_Param *param;
1848 TW_Command *command_packet;
1849 unsigned long command_que_value;
1850 unsigned long param_value;
1851
1852 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_test_unit_ready()\n");
1853
1854 /* Initialize command packet */
1855 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1856 if (command_packet == NULL) {
1857 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet virtual address.\n");
1858 return 1;
1859 }
1860 memset(command_packet, 0, sizeof(TW_Sector));
1861 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1862 command_packet->size = 4;
1863 command_packet->request_id = request_id;
1864 command_packet->status = 0;
1865 command_packet->flags = 0;
1866 command_packet->byte6.parameter_count = 1;
1867
1868 /* Now setup the param */
1869 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1870 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment virtual address.\n");
1871 return 1;
1872 }
1873 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1874 memset(param, 0, sizeof(TW_Sector));
1875 param->table_id = 3; /* unit summary table */
1876 param->parameter_id = 3; /* unitsstatus parameter */
1877 param->parameter_size_bytes = TW_MAX_UNITS;
1878 param_value = tw_dev->alignment_physical_address[request_id];
1879 if (param_value == 0) {
1880 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment physical address.\n");
1881 return 1;
1882 }
1883
1884 command_packet->byte8.param.sgl[0].address = param_value;
1885 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1886 command_que_value = tw_dev->command_packet_physical_address[request_id];
1887 if (command_que_value == 0) {
1888 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet physical address.\n");
1889 return 1;
1890 }
1891
1892 /* Now try to post the command packet */
1893 tw_post_command_packet(tw_dev, request_id);
1894
1895 return 0;
1896 } /* End tw_scsiop_test_unit_ready() */
1897
1898 /* This function is called by the isr to complete a testunitready command */
1899 static int tw_scsiop_test_unit_ready_complete(TW_Device_Extension *tw_dev, int request_id)
1900 {
1901 unsigned char *is_unit_present;
1902 TW_Param *param;
1903
1904 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete()\n");
1905
1906 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1907 if (param == NULL) {
1908 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete(): Bad alignment virtual address.\n");
1909 return 1;
1910 }
1911 is_unit_present = &(param->data[0]);
1912
1913 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1914 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1915 } else {
1916 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1917 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1918 return TW_ISR_DONT_RESULT;
1919 }
1920
1921 return 0;
1922 } /* End tw_scsiop_test_unit_ready_complete() */
1923
1924 /* This is the main scsi queue function to handle scsi opcodes */
1925 static int tw_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
1926 {
1927 unsigned char *command = SCpnt->cmnd;
1928 int request_id = 0;
1929 int retval = 1;
1930 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1931
1932 /* If we are resetting due to timed out ioctl, report as busy */
1933 if (test_bit(TW_IN_RESET, &tw_dev->flags))
1934 return SCSI_MLQUEUE_HOST_BUSY;
1935
1936 /* Save done function into Scsi_Cmnd struct */
1937 SCpnt->scsi_done = done;
1938
1939 /* Queue the command and get a request id */
1940 tw_state_request_start(tw_dev, &request_id);
1941
1942 /* Save the scsi command for use by the ISR */
1943 tw_dev->srb[request_id] = SCpnt;
1944
1945 switch (*command) {
1946 case READ_10:
1947 case READ_6:
1948 case WRITE_10:
1949 case WRITE_6:
1950 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ/WRITE.\n");
1951 retval = tw_scsiop_read_write(tw_dev, request_id);
1952 break;
1953 case TEST_UNIT_READY:
1954 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught TEST_UNIT_READY.\n");
1955 retval = tw_scsiop_test_unit_ready(tw_dev, request_id);
1956 break;
1957 case INQUIRY:
1958 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught INQUIRY.\n");
1959 retval = tw_scsiop_inquiry(tw_dev, request_id);
1960 break;
1961 case READ_CAPACITY:
1962 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ_CAPACITY.\n");
1963 retval = tw_scsiop_read_capacity(tw_dev, request_id);
1964 break;
1965 case REQUEST_SENSE:
1966 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught REQUEST_SENSE.\n");
1967 retval = tw_scsiop_request_sense(tw_dev, request_id);
1968 break;
1969 case MODE_SENSE:
1970 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught MODE_SENSE.\n");
1971 retval = tw_scsiop_mode_sense(tw_dev, request_id);
1972 break;
1973 case SYNCHRONIZE_CACHE:
1974 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught SYNCHRONIZE_CACHE.\n");
1975 retval = tw_scsiop_synchronize_cache(tw_dev, request_id);
1976 break;
1977 case TW_IOCTL:
1978 printk(KERN_WARNING "3w-xxxx: SCSI_IOCTL_SEND_COMMAND deprecated, please update your 3ware tools.\n");
1979 break;
1980 default:
1981 printk(KERN_NOTICE "3w-xxxx: scsi%d: Unknown scsi opcode: 0x%x\n", tw_dev->host->host_no, *command);
1982 tw_dev->state[request_id] = TW_S_COMPLETED;
1983 tw_state_request_finish(tw_dev, request_id);
1984 SCpnt->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1985 scsi_build_sense_buffer(1, SCpnt->sense_buffer, ILLEGAL_REQUEST, 0x20, 0);
1986 done(SCpnt);
1987 retval = 0;
1988 }
1989 if (retval) {
1990 tw_dev->state[request_id] = TW_S_COMPLETED;
1991 tw_state_request_finish(tw_dev, request_id);
1992 SCpnt->result = (DID_ERROR << 16);
1993 done(SCpnt);
1994 retval = 0;
1995 }
1996 return retval;
1997 } /* End tw_scsi_queue() */
1998
1999 static DEF_SCSI_QCMD(tw_scsi_queue)
2000
2001 /* This function is the interrupt service routine */
2002 static irqreturn_t tw_interrupt(int irq, void *dev_instance)
2003 {
2004 int request_id;
2005 u32 status_reg_value;
2006 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
2007 TW_Response_Queue response_que;
2008 int error = 0, retval = 0;
2009 TW_Command *command_packet;
2010 int handled = 0;
2011
2012 /* Get the host lock for io completions */
2013 spin_lock(tw_dev->host->host_lock);
2014
2015 /* Read the registers */
2016 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2017
2018 /* Check if this is our interrupt, otherwise bail */
2019 if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
2020 goto tw_interrupt_bail;
2021
2022 handled = 1;
2023
2024 /* If we are resetting, bail */
2025 if (test_bit(TW_IN_RESET, &tw_dev->flags))
2026 goto tw_interrupt_bail;
2027
2028 /* Check controller for errors */
2029 if (tw_check_bits(status_reg_value)) {
2030 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2031 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2032 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2033 goto tw_interrupt_bail;
2034 }
2035 }
2036
2037 /* Handle host interrupt */
2038 if (status_reg_value & TW_STATUS_HOST_INTERRUPT) {
2039 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received host interrupt.\n");
2040 TW_CLEAR_HOST_INTERRUPT(tw_dev);
2041 }
2042
2043 /* Handle attention interrupt */
2044 if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
2045 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received attention interrupt.\n");
2046 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
2047 tw_state_request_start(tw_dev, &request_id);
2048 error = tw_aen_read_queue(tw_dev, request_id);
2049 if (error) {
2050 printk(KERN_WARNING "3w-xxxx: scsi%d: Error reading aen queue.\n", tw_dev->host->host_no);
2051 tw_dev->state[request_id] = TW_S_COMPLETED;
2052 tw_state_request_finish(tw_dev, request_id);
2053 }
2054 }
2055
2056 /* Handle command interrupt */
2057 if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
2058 /* Drain as many pending commands as we can */
2059 while (tw_dev->pending_request_count > 0) {
2060 request_id = tw_dev->pending_queue[tw_dev->pending_head];
2061 if (tw_dev->state[request_id] != TW_S_PENDING) {
2062 printk(KERN_WARNING "3w-xxxx: scsi%d: Found request id that wasn't pending.\n", tw_dev->host->host_no);
2063 break;
2064 }
2065 if (tw_post_command_packet(tw_dev, request_id)==0) {
2066 if (tw_dev->pending_head == TW_Q_LENGTH-1) {
2067 tw_dev->pending_head = TW_Q_START;
2068 } else {
2069 tw_dev->pending_head = tw_dev->pending_head + 1;
2070 }
2071 tw_dev->pending_request_count--;
2072 } else {
2073 /* If we get here, we will continue re-posting on the next command interrupt */
2074 break;
2075 }
2076 }
2077 /* If there are no more pending requests, we mask command interrupt */
2078 if (tw_dev->pending_request_count == 0)
2079 TW_MASK_COMMAND_INTERRUPT(tw_dev);
2080 }
2081
2082 /* Handle response interrupt */
2083 if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
2084 /* Drain the response queue from the board */
2085 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
2086 /* Read response queue register */
2087 response_que.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
2088 request_id = TW_RESID_OUT(response_que.response_id);
2089 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
2090 error = 0;
2091
2092 /* Check for bad response */
2093 if (command_packet->status != 0) {
2094 /* If internal command, don't error, don't fill sense */
2095 if (tw_dev->srb[request_id] == NULL) {
2096 tw_decode_sense(tw_dev, request_id, 0);
2097 } else {
2098 error = tw_decode_sense(tw_dev, request_id, 1);
2099 }
2100 }
2101
2102 /* Check for correct state */
2103 if (tw_dev->state[request_id] != TW_S_POSTED) {
2104 if (tw_dev->srb[request_id] != NULL) {
2105 printk(KERN_WARNING "3w-xxxx: scsi%d: Received a request id that wasn't posted.\n", tw_dev->host->host_no);
2106 error = 1;
2107 }
2108 }
2109
2110 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Response queue request id: %d.\n", request_id);
2111
2112 /* Check for internal command completion */
2113 if (tw_dev->srb[request_id] == NULL) {
2114 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Found internally posted command.\n");
2115 /* Check for chrdev ioctl completion */
2116 if (request_id != tw_dev->chrdev_request_id) {
2117 retval = tw_aen_complete(tw_dev, request_id);
2118 if (retval) {
2119 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing aen.\n", tw_dev->host->host_no);
2120 }
2121 } else {
2122 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
2123 wake_up(&tw_dev->ioctl_wqueue);
2124 }
2125 } else {
2126 switch (tw_dev->srb[request_id]->cmnd[0]) {
2127 case READ_10:
2128 case READ_6:
2129 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_10/READ_6\n");
2130 break;
2131 case WRITE_10:
2132 case WRITE_6:
2133 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught WRITE_10/WRITE_6\n");
2134 break;
2135 case TEST_UNIT_READY:
2136 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught TEST_UNIT_READY\n");
2137 error = tw_scsiop_test_unit_ready_complete(tw_dev, request_id);
2138 break;
2139 case INQUIRY:
2140 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught INQUIRY\n");
2141 error = tw_scsiop_inquiry_complete(tw_dev, request_id);
2142 break;
2143 case READ_CAPACITY:
2144 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_CAPACITY\n");
2145 error = tw_scsiop_read_capacity_complete(tw_dev, request_id);
2146 break;
2147 case MODE_SENSE:
2148 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught MODE_SENSE\n");
2149 error = tw_scsiop_mode_sense_complete(tw_dev, request_id);
2150 break;
2151 case SYNCHRONIZE_CACHE:
2152 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught SYNCHRONIZE_CACHE\n");
2153 break;
2154 default:
2155 printk(KERN_WARNING "3w-xxxx: case slip in tw_interrupt()\n");
2156 error = 1;
2157 }
2158
2159 /* If no error command was a success */
2160 if (error == 0) {
2161 tw_dev->srb[request_id]->result = (DID_OK << 16);
2162 }
2163
2164 /* If error, command failed */
2165 if (error == 1) {
2166 /* Ask for a host reset */
2167 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
2168 }
2169
2170 /* Now complete the io */
2171 if ((error != TW_ISR_DONT_COMPLETE)) {
2172 scsi_dma_unmap(tw_dev->srb[request_id]);
2173 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
2174 tw_dev->state[request_id] = TW_S_COMPLETED;
2175 tw_state_request_finish(tw_dev, request_id);
2176 tw_dev->posted_request_count--;
2177 }
2178 }
2179
2180 /* Check for valid status after each drain */
2181 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2182 if (tw_check_bits(status_reg_value)) {
2183 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2184 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2185 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2186 goto tw_interrupt_bail;
2187 }
2188 }
2189 }
2190 }
2191
2192 tw_interrupt_bail:
2193 spin_unlock(tw_dev->host->host_lock);
2194 return IRQ_RETVAL(handled);
2195 } /* End tw_interrupt() */
2196
2197 /* This function tells the controller to shut down */
2198 static void __tw_shutdown(TW_Device_Extension *tw_dev)
2199 {
2200 /* Disable interrupts */
2201 TW_DISABLE_INTERRUPTS(tw_dev);
2202
2203 /* Free up the IRQ */
2204 free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
2205
2206 printk(KERN_WARNING "3w-xxxx: Shutting down host %d.\n", tw_dev->host->host_no);
2207
2208 /* Tell the card we are shutting down */
2209 if (tw_initconnection(tw_dev, 1)) {
2210 printk(KERN_WARNING "3w-xxxx: Connection shutdown failed.\n");
2211 } else {
2212 printk(KERN_WARNING "3w-xxxx: Shutdown complete.\n");
2213 }
2214
2215 /* Clear all interrupts just before exit */
2216 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2217 } /* End __tw_shutdown() */
2218
2219 /* Wrapper for __tw_shutdown */
2220 static void tw_shutdown(struct pci_dev *pdev)
2221 {
2222 struct Scsi_Host *host = pci_get_drvdata(pdev);
2223 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2224
2225 __tw_shutdown(tw_dev);
2226 } /* End tw_shutdown() */
2227
2228 /* This function gets called when a disk is coming online */
2229 static int tw_slave_configure(struct scsi_device *sdev)
2230 {
2231 /* Force 60 second timeout */
2232 blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
2233
2234 return 0;
2235 } /* End tw_slave_configure() */
2236
2237 static struct scsi_host_template driver_template = {
2238 .module = THIS_MODULE,
2239 .name = "3ware Storage Controller",
2240 .queuecommand = tw_scsi_queue,
2241 .eh_host_reset_handler = tw_scsi_eh_reset,
2242 .bios_param = tw_scsi_biosparam,
2243 .change_queue_depth = tw_change_queue_depth,
2244 .can_queue = TW_Q_LENGTH-2,
2245 .slave_configure = tw_slave_configure,
2246 .this_id = -1,
2247 .sg_tablesize = TW_MAX_SGL_LENGTH,
2248 .max_sectors = TW_MAX_SECTORS,
2249 .cmd_per_lun = TW_MAX_CMDS_PER_LUN,
2250 .use_clustering = ENABLE_CLUSTERING,
2251 .shost_attrs = tw_host_attrs,
2252 .emulated = 1,
2253 .no_write_same = 1,
2254 };
2255
2256 /* This function will probe and initialize a card */
2257 static int tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
2258 {
2259 struct Scsi_Host *host = NULL;
2260 TW_Device_Extension *tw_dev;
2261 int retval = -ENODEV;
2262
2263 retval = pci_enable_device(pdev);
2264 if (retval) {
2265 printk(KERN_WARNING "3w-xxxx: Failed to enable pci device.");
2266 goto out_disable_device;
2267 }
2268
2269 pci_set_master(pdev);
2270
2271 retval = pci_set_dma_mask(pdev, TW_DMA_MASK);
2272 if (retval) {
2273 printk(KERN_WARNING "3w-xxxx: Failed to set dma mask.");
2274 goto out_disable_device;
2275 }
2276
2277 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2278 if (!host) {
2279 printk(KERN_WARNING "3w-xxxx: Failed to allocate memory for device extension.");
2280 retval = -ENOMEM;
2281 goto out_disable_device;
2282 }
2283 tw_dev = (TW_Device_Extension *)host->hostdata;
2284
2285 /* Save values to device extension */
2286 tw_dev->host = host;
2287 tw_dev->tw_pci_dev = pdev;
2288
2289 if (tw_initialize_device_extension(tw_dev)) {
2290 printk(KERN_WARNING "3w-xxxx: Failed to initialize device extension.");
2291 goto out_free_device_extension;
2292 }
2293
2294 /* Request IO regions */
2295 retval = pci_request_regions(pdev, "3w-xxxx");
2296 if (retval) {
2297 printk(KERN_WARNING "3w-xxxx: Failed to get mem region.");
2298 goto out_free_device_extension;
2299 }
2300
2301 /* Save base address */
2302 tw_dev->base_addr = pci_resource_start(pdev, 0);
2303 if (!tw_dev->base_addr) {
2304 printk(KERN_WARNING "3w-xxxx: Failed to get io address.");
2305 goto out_release_mem_region;
2306 }
2307
2308 /* Disable interrupts on the card */
2309 TW_DISABLE_INTERRUPTS(tw_dev);
2310
2311 /* Initialize the card */
2312 if (tw_reset_sequence(tw_dev))
2313 goto out_release_mem_region;
2314
2315 /* Set host specific parameters */
2316 host->max_id = TW_MAX_UNITS;
2317 host->max_cmd_len = TW_MAX_CDB_LEN;
2318
2319 /* Luns and channels aren't supported by adapter */
2320 host->max_lun = 0;
2321 host->max_channel = 0;
2322
2323 /* Register the card with the kernel SCSI layer */
2324 retval = scsi_add_host(host, &pdev->dev);
2325 if (retval) {
2326 printk(KERN_WARNING "3w-xxxx: scsi add host failed");
2327 goto out_release_mem_region;
2328 }
2329
2330 pci_set_drvdata(pdev, host);
2331
2332 printk(KERN_WARNING "3w-xxxx: scsi%d: Found a 3ware Storage Controller at 0x%x, IRQ: %d.\n", host->host_no, tw_dev->base_addr, pdev->irq);
2333
2334 /* Now setup the interrupt handler */
2335 retval = request_irq(pdev->irq, tw_interrupt, IRQF_SHARED, "3w-xxxx", tw_dev);
2336 if (retval) {
2337 printk(KERN_WARNING "3w-xxxx: Error requesting IRQ.");
2338 goto out_remove_host;
2339 }
2340
2341 tw_device_extension_list[tw_device_extension_count] = tw_dev;
2342 tw_device_extension_count++;
2343
2344 /* Re-enable interrupts on the card */
2345 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2346
2347 /* Finally, scan the host */
2348 scsi_scan_host(host);
2349
2350 if (twe_major == -1) {
2351 if ((twe_major = register_chrdev (0, "twe", &tw_fops)) < 0)
2352 printk(KERN_WARNING "3w-xxxx: Failed to register character device.");
2353 }
2354 return 0;
2355
2356 out_remove_host:
2357 scsi_remove_host(host);
2358 out_release_mem_region:
2359 pci_release_regions(pdev);
2360 out_free_device_extension:
2361 tw_free_device_extension(tw_dev);
2362 scsi_host_put(host);
2363 out_disable_device:
2364 pci_disable_device(pdev);
2365
2366 return retval;
2367 } /* End tw_probe() */
2368
2369 /* This function is called to remove a device */
2370 static void tw_remove(struct pci_dev *pdev)
2371 {
2372 struct Scsi_Host *host = pci_get_drvdata(pdev);
2373 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2374
2375 scsi_remove_host(tw_dev->host);
2376
2377 /* Unregister character device */
2378 if (twe_major >= 0) {
2379 unregister_chrdev(twe_major, "twe");
2380 twe_major = -1;
2381 }
2382
2383 /* Shutdown the card */
2384 __tw_shutdown(tw_dev);
2385
2386 /* Free up the mem region */
2387 pci_release_regions(pdev);
2388
2389 /* Free up device extension resources */
2390 tw_free_device_extension(tw_dev);
2391
2392 scsi_host_put(tw_dev->host);
2393 pci_disable_device(pdev);
2394 tw_device_extension_count--;
2395 } /* End tw_remove() */
2396
2397 /* PCI Devices supported by this driver */
2398 static struct pci_device_id tw_pci_tbl[] = {
2399 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_1000,
2400 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2401 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_7000,
2402 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2403 { }
2404 };
2405 MODULE_DEVICE_TABLE(pci, tw_pci_tbl);
2406
2407 /* pci_driver initializer */
2408 static struct pci_driver tw_driver = {
2409 .name = "3w-xxxx",
2410 .id_table = tw_pci_tbl,
2411 .probe = tw_probe,
2412 .remove = tw_remove,
2413 .shutdown = tw_shutdown,
2414 };
2415
2416 /* This function is called on driver initialization */
2417 static int __init tw_init(void)
2418 {
2419 printk(KERN_WARNING "3ware Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2420
2421 return pci_register_driver(&tw_driver);
2422 } /* End tw_init() */
2423
2424 /* This function is called on driver exit */
2425 static void __exit tw_exit(void)
2426 {
2427 pci_unregister_driver(&tw_driver);
2428 } /* End tw_exit() */
2429
2430 module_init(tw_init);
2431 module_exit(tw_exit);
2432
Linux with added FPC-III support