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tcp: fix lockdep splat in tcp_snd_una_update()
[linux/fpc-iii.git] / drivers / scsi / 3w-xxxx.c
blob25aba1613e2157f7a2e468007c202a16015b3f40
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 /* Create sysfs 'stats' entry */
527 static struct device_attribute tw_host_stats_attr = {
528 .attr = {
529 .name = "stats",
530 .mode = S_IRUGO,
531 },
532 .show = tw_show_stats
533 };
534
535 /* Host attributes initializer */
536 static struct device_attribute *tw_host_attrs[] = {
537 &tw_host_stats_attr,
538 NULL,
539 };
540
541 /* This function will read the aen queue from the isr */
542 static int tw_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
543 {
544 TW_Command *command_packet;
545 TW_Param *param;
546 unsigned long command_que_value;
547 u32 status_reg_value;
548 unsigned long param_value = 0;
549
550 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_read_queue()\n");
551
552 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
553 if (tw_check_bits(status_reg_value)) {
554 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Unexpected bits.\n");
555 tw_decode_bits(tw_dev, status_reg_value, 1);
556 return 1;
557 }
558 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
559 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet virtual address.\n");
560 return 1;
561 }
562 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
563 memset(command_packet, 0, sizeof(TW_Sector));
564 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
565 command_packet->size = 4;
566 command_packet->request_id = request_id;
567 command_packet->status = 0;
568 command_packet->flags = 0;
569 command_packet->byte6.parameter_count = 1;
570 command_que_value = tw_dev->command_packet_physical_address[request_id];
571 if (command_que_value == 0) {
572 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet physical address.\n");
573 return 1;
574 }
575 /* Now setup the param */
576 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
577 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment virtual address.\n");
578 return 1;
579 }
580 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
581 memset(param, 0, sizeof(TW_Sector));
582 param->table_id = 0x401; /* AEN table */
583 param->parameter_id = 2; /* Unit code */
584 param->parameter_size_bytes = 2;
585 param_value = tw_dev->alignment_physical_address[request_id];
586 if (param_value == 0) {
587 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment physical address.\n");
588 return 1;
589 }
590 command_packet->byte8.param.sgl[0].address = param_value;
591 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
592
593 /* Now post the command packet */
594 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
595 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post succeeded.\n");
596 tw_dev->srb[request_id] = NULL; /* Flag internal command */
597 tw_dev->state[request_id] = TW_S_POSTED;
598 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
599 } else {
600 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post failed, will retry.\n");
601 return 1;
602 }
603
604 return 0;
605 } /* End tw_aen_read_queue() */
606
607 /* This function will complete an aen request from the isr */
608 static int tw_aen_complete(TW_Device_Extension *tw_dev, int request_id)
609 {
610 TW_Param *param;
611 unsigned short aen;
612 int error = 0, table_max = 0;
613
614 dprintk(KERN_WARNING "3w-xxxx: tw_aen_complete()\n");
615 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
616 printk(KERN_WARNING "3w-xxxx: tw_aen_complete(): Bad alignment virtual address.\n");
617 return 1;
618 }
619 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
620 aen = *(unsigned short *)(param->data);
621 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_complete(): Queue'd code 0x%x\n", aen);
622
623 /* Print some useful info when certain aen codes come out */
624 if (aen == 0x0ff) {
625 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: INFO: AEN queue overflow.\n", tw_dev->host->host_no);
626 } else {
627 table_max = ARRAY_SIZE(tw_aen_string);
628 if ((aen & 0x0ff) < table_max) {
629 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
630 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s%d.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff], aen >> 8);
631 } else {
632 if (aen != 0x0)
633 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff]);
634 }
635 } else {
636 printk(KERN_WARNING "3w-xxxx: scsi%d: Received AEN %d.\n", tw_dev->host->host_no, aen);
637 }
638 }
639 if (aen != TW_AEN_QUEUE_EMPTY) {
640 tw_dev->aen_count++;
641
642 /* Now queue the code */
643 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
644 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
645 tw_dev->aen_tail = TW_Q_START;
646 } else {
647 tw_dev->aen_tail = tw_dev->aen_tail + 1;
648 }
649 if (tw_dev->aen_head == tw_dev->aen_tail) {
650 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
651 tw_dev->aen_head = TW_Q_START;
652 } else {
653 tw_dev->aen_head = tw_dev->aen_head + 1;
654 }
655 }
656
657 error = tw_aen_read_queue(tw_dev, request_id);
658 if (error) {
659 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing AEN.\n", tw_dev->host->host_no);
660 tw_dev->state[request_id] = TW_S_COMPLETED;
661 tw_state_request_finish(tw_dev, request_id);
662 }
663 } else {
664 tw_dev->state[request_id] = TW_S_COMPLETED;
665 tw_state_request_finish(tw_dev, request_id);
666 }
667
668 return 0;
669 } /* End tw_aen_complete() */
670
671 /* This function will drain the aen queue after a soft reset */
672 static int tw_aen_drain_queue(TW_Device_Extension *tw_dev)
673 {
674 TW_Command *command_packet;
675 TW_Param *param;
676 int request_id = 0;
677 unsigned long command_que_value;
678 unsigned long param_value;
679 TW_Response_Queue response_queue;
680 unsigned short aen;
681 unsigned short aen_code;
682 int finished = 0;
683 int first_reset = 0;
684 int queue = 0;
685 int found = 0, table_max = 0;
686
687 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_drain_queue()\n");
688
689 if (tw_poll_status(tw_dev, TW_STATUS_ATTENTION_INTERRUPT | TW_STATUS_MICROCONTROLLER_READY, 30)) {
690 dprintk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): No attention interrupt for card %d.\n", tw_device_extension_count);
691 return 1;
692 }
693 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
694
695 /* Empty response queue */
696 tw_empty_response_que(tw_dev);
697
698 /* Initialize command packet */
699 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
700 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet virtual address.\n");
701 return 1;
702 }
703 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
704 memset(command_packet, 0, sizeof(TW_Sector));
705 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
706 command_packet->size = 4;
707 command_packet->request_id = request_id;
708 command_packet->status = 0;
709 command_packet->flags = 0;
710 command_packet->byte6.parameter_count = 1;
711 command_que_value = tw_dev->command_packet_physical_address[request_id];
712 if (command_que_value == 0) {
713 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet physical address.\n");
714 return 1;
715 }
716
717 /* Now setup the param */
718 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
719 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment virtual address.\n");
720 return 1;
721 }
722 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
723 memset(param, 0, sizeof(TW_Sector));
724 param->table_id = 0x401; /* AEN table */
725 param->parameter_id = 2; /* Unit code */
726 param->parameter_size_bytes = 2;
727 param_value = tw_dev->alignment_physical_address[request_id];
728 if (param_value == 0) {
729 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment physical address.\n");
730 return 1;
731 }
732 command_packet->byte8.param.sgl[0].address = param_value;
733 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
734
735 /* Now drain the controller's aen queue */
736 do {
737 /* Post command packet */
738 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
739
740 /* Now poll for completion */
741 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
742 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
743 request_id = TW_RESID_OUT(response_queue.response_id);
744
745 if (request_id != 0) {
746 /* Unexpected request id */
747 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Unexpected request id.\n");
748 return 1;
749 }
750
751 if (command_packet->status != 0) {
752 if (command_packet->flags != TW_AEN_TABLE_UNDEFINED) {
753 /* Bad response */
754 tw_decode_sense(tw_dev, request_id, 0);
755 return 1;
756 } else {
757 /* We know this is a 3w-1x00, and doesn't support aen's */
758 return 0;
759 }
760 }
761
762 /* Now check the aen */
763 aen = *(unsigned short *)(param->data);
764 aen_code = (aen & 0x0ff);
765 queue = 0;
766 switch (aen_code) {
767 case TW_AEN_QUEUE_EMPTY:
768 dprintk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
769 if (first_reset != 1) {
770 return 1;
771 } else {
772 finished = 1;
773 }
774 break;
775 case TW_AEN_SOFT_RESET:
776 if (first_reset == 0) {
777 first_reset = 1;
778 } else {
779 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
780 tw_dev->aen_count++;
781 queue = 1;
782 }
783 break;
784 default:
785 if (aen == 0x0ff) {
786 printk(KERN_WARNING "3w-xxxx: AEN: INFO: AEN queue overflow.\n");
787 } else {
788 table_max = ARRAY_SIZE(tw_aen_string);
789 if ((aen & 0x0ff) < table_max) {
790 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
791 printk(KERN_WARNING "3w-xxxx: AEN: %s%d.\n", tw_aen_string[aen & 0xff], aen >> 8);
792 } else {
793 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
794 }
795 } else
796 printk(KERN_WARNING "3w-xxxx: Received AEN %d.\n", aen);
797 }
798 tw_dev->aen_count++;
799 queue = 1;
800 }
801
802 /* Now put the aen on the aen_queue */
803 if (queue == 1) {
804 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
805 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
806 tw_dev->aen_tail = TW_Q_START;
807 } else {
808 tw_dev->aen_tail = tw_dev->aen_tail + 1;
809 }
810 if (tw_dev->aen_head == tw_dev->aen_tail) {
811 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
812 tw_dev->aen_head = TW_Q_START;
813 } else {
814 tw_dev->aen_head = tw_dev->aen_head + 1;
815 }
816 }
817 }
818 found = 1;
819 }
820 if (found == 0) {
821 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Response never received.\n");
822 return 1;
823 }
824 } while (finished == 0);
825
826 return 0;
827 } /* End tw_aen_drain_queue() */
828
829 /* This function will allocate memory */
830 static int tw_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
831 {
832 int i;
833 dma_addr_t dma_handle;
834 unsigned long *cpu_addr = NULL;
835
836 dprintk(KERN_NOTICE "3w-xxxx: tw_allocate_memory()\n");
837
838 cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
839 if (cpu_addr == NULL) {
840 printk(KERN_WARNING "3w-xxxx: pci_alloc_consistent() failed.\n");
841 return 1;
842 }
843
844 if ((unsigned long)cpu_addr % (tw_dev->tw_pci_dev->device == TW_DEVICE_ID ? TW_ALIGNMENT_6000 : TW_ALIGNMENT_7000)) {
845 printk(KERN_WARNING "3w-xxxx: Couldn't allocate correctly aligned memory.\n");
846 pci_free_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, cpu_addr, dma_handle);
847 return 1;
848 }
849
850 memset(cpu_addr, 0, size*TW_Q_LENGTH);
851
852 for (i=0;i<TW_Q_LENGTH;i++) {
853 switch(which) {
854 case 0:
855 tw_dev->command_packet_physical_address[i] = dma_handle+(i*size);
856 tw_dev->command_packet_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
857 break;
858 case 1:
859 tw_dev->alignment_physical_address[i] = dma_handle+(i*size);
860 tw_dev->alignment_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
861 break;
862 default:
863 printk(KERN_WARNING "3w-xxxx: tw_allocate_memory(): case slip in tw_allocate_memory()\n");
864 return 1;
865 }
866 }
867
868 return 0;
869 } /* End tw_allocate_memory() */
870
871 /* This function handles ioctl for the character device */
872 static long tw_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
873 {
874 int request_id;
875 dma_addr_t dma_handle;
876 unsigned short tw_aen_code;
877 unsigned long flags;
878 unsigned int data_buffer_length = 0;
879 unsigned long data_buffer_length_adjusted = 0;
880 struct inode *inode = file_inode(file);
881 unsigned long *cpu_addr;
882 long timeout;
883 TW_New_Ioctl *tw_ioctl;
884 TW_Passthru *passthru;
885 TW_Device_Extension *tw_dev = tw_device_extension_list[iminor(inode)];
886 int retval = -EFAULT;
887 void __user *argp = (void __user *)arg;
888
889 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl()\n");
890
891 mutex_lock(&tw_mutex);
892 /* Only let one of these through at a time */
893 if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
894 mutex_unlock(&tw_mutex);
895 return -EINTR;
896 }
897
898 /* First copy down the buffer length */
899 if (copy_from_user(&data_buffer_length, argp, sizeof(unsigned int)))
900 goto out;
901
902 /* Check size */
903 if (data_buffer_length > TW_MAX_IOCTL_SECTORS * 512) {
904 retval = -EINVAL;
905 goto out;
906 }
907
908 /* Hardware can only do multiple of 512 byte transfers */
909 data_buffer_length_adjusted = (data_buffer_length + 511) & ~511;
910
911 /* Now allocate ioctl buf memory */
912 cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, &dma_handle, GFP_KERNEL);
913 if (cpu_addr == NULL) {
914 retval = -ENOMEM;
915 goto out;
916 }
917
918 tw_ioctl = (TW_New_Ioctl *)cpu_addr;
919
920 /* Now copy down the entire ioctl */
921 if (copy_from_user(tw_ioctl, argp, data_buffer_length + sizeof(TW_New_Ioctl) - 1))
922 goto out2;
923
924 passthru = (TW_Passthru *)&tw_ioctl->firmware_command;
925
926 /* See which ioctl we are doing */
927 switch (cmd) {
928 case TW_OP_NOP:
929 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_OP_NOP.\n");
930 break;
931 case TW_OP_AEN_LISTEN:
932 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_AEN_LISTEN.\n");
933 memset(tw_ioctl->data_buffer, 0, data_buffer_length);
934
935 spin_lock_irqsave(tw_dev->host->host_lock, flags);
936 if (tw_dev->aen_head == tw_dev->aen_tail) {
937 tw_aen_code = TW_AEN_QUEUE_EMPTY;
938 } else {
939 tw_aen_code = tw_dev->aen_queue[tw_dev->aen_head];
940 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
941 tw_dev->aen_head = TW_Q_START;
942 } else {
943 tw_dev->aen_head = tw_dev->aen_head + 1;
944 }
945 }
946 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
947 memcpy(tw_ioctl->data_buffer, &tw_aen_code, sizeof(tw_aen_code));
948 break;
949 case TW_CMD_PACKET_WITH_DATA:
950 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_CMD_PACKET_WITH_DATA.\n");
951 spin_lock_irqsave(tw_dev->host->host_lock, flags);
952
953 tw_state_request_start(tw_dev, &request_id);
954
955 /* Flag internal command */
956 tw_dev->srb[request_id] = NULL;
957
958 /* Flag chrdev ioctl */
959 tw_dev->chrdev_request_id = request_id;
960
961 tw_ioctl->firmware_command.request_id = request_id;
962
963 /* Load the sg list */
964 switch (TW_SGL_OUT(tw_ioctl->firmware_command.opcode__sgloffset)) {
965 case 2:
966 tw_ioctl->firmware_command.byte8.param.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
967 tw_ioctl->firmware_command.byte8.param.sgl[0].length = data_buffer_length_adjusted;
968 break;
969 case 3:
970 tw_ioctl->firmware_command.byte8.io.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
971 tw_ioctl->firmware_command.byte8.io.sgl[0].length = data_buffer_length_adjusted;
972 break;
973 case 5:
974 passthru->sg_list[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
975 passthru->sg_list[0].length = data_buffer_length_adjusted;
976 break;
977 }
978
979 memcpy(tw_dev->command_packet_virtual_address[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command));
980
981 /* Now post the command packet to the controller */
982 tw_post_command_packet(tw_dev, request_id);
983 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
984
985 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
986
987 /* Now wait for the command to complete */
988 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
989
990 /* We timed out, and didn't get an interrupt */
991 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
992 /* Now we need to reset the board */
993 printk(KERN_WARNING "3w-xxxx: scsi%d: Character ioctl (0x%x) timed out, resetting card.\n", tw_dev->host->host_no, cmd);
994 retval = -EIO;
995 if (tw_reset_device_extension(tw_dev)) {
996 printk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): Reset failed for card %d.\n", tw_dev->host->host_no);
997 }
998 goto out2;
999 }
1000
1001 /* Now copy in the command packet response */
1002 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virtual_address[request_id], sizeof(TW_Command));
1003
1004 /* Now complete the io */
1005 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1006 tw_dev->posted_request_count--;
1007 tw_dev->state[request_id] = TW_S_COMPLETED;
1008 tw_state_request_finish(tw_dev, request_id);
1009 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1010 break;
1011 default:
1012 retval = -ENOTTY;
1013 goto out2;
1014 }
1015
1016 /* Now copy the response to userspace */
1017 if (copy_to_user(argp, tw_ioctl, sizeof(TW_New_Ioctl) + data_buffer_length - 1))
1018 goto out2;
1019 retval = 0;
1020 out2:
1021 /* Now free ioctl buf memory */
1022 dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, cpu_addr, dma_handle);
1023 out:
1024 mutex_unlock(&tw_dev->ioctl_lock);
1025 mutex_unlock(&tw_mutex);
1026 return retval;
1027 } /* End tw_chrdev_ioctl() */
1028
1029 /* This function handles open for the character device */
1030 /* NOTE that this function races with remove. */
1031 static int tw_chrdev_open(struct inode *inode, struct file *file)
1032 {
1033 unsigned int minor_number;
1034
1035 dprintk(KERN_WARNING "3w-xxxx: tw_ioctl_open()\n");
1036
1037 minor_number = iminor(inode);
1038 if (minor_number >= tw_device_extension_count)
1039 return -ENODEV;
1040
1041 return 0;
1042 } /* End tw_chrdev_open() */
1043
1044 /* File operations struct for character device */
1045 static const struct file_operations tw_fops = {
1046 .owner = THIS_MODULE,
1047 .unlocked_ioctl = tw_chrdev_ioctl,
1048 #ifdef CONFIG_COMPAT
1049 .compat_ioctl = tw_chrdev_ioctl,
1050 #endif
1051 .open = tw_chrdev_open,
1052 .release = NULL,
1053 .llseek = noop_llseek,
1054 };
1055
1056 /* This function will free up device extension resources */
1057 static void tw_free_device_extension(TW_Device_Extension *tw_dev)
1058 {
1059 dprintk(KERN_NOTICE "3w-xxxx: tw_free_device_extension()\n");
1060
1061 /* Free command packet and generic buffer memory */
1062 if (tw_dev->command_packet_virtual_address[0])
1063 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]);
1064
1065 if (tw_dev->alignment_virtual_address[0])
1066 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]);
1067 } /* End tw_free_device_extension() */
1068
1069 /* This function will send an initconnection command to controller */
1070 static int tw_initconnection(TW_Device_Extension *tw_dev, int message_credits)
1071 {
1072 unsigned long command_que_value;
1073 TW_Command *command_packet;
1074 TW_Response_Queue response_queue;
1075 int request_id = 0;
1076
1077 dprintk(KERN_NOTICE "3w-xxxx: tw_initconnection()\n");
1078
1079 /* Initialize InitConnection command packet */
1080 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1081 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet virtual address.\n");
1082 return 1;
1083 }
1084
1085 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1086 memset(command_packet, 0, sizeof(TW_Sector));
1087 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_INIT_CONNECTION);
1088 command_packet->size = TW_INIT_COMMAND_PACKET_SIZE;
1089 command_packet->request_id = request_id;
1090 command_packet->status = 0x0;
1091 command_packet->flags = 0x0;
1092 command_packet->byte6.message_credits = message_credits;
1093 command_packet->byte8.init_connection.response_queue_pointer = 0x0;
1094 command_que_value = tw_dev->command_packet_physical_address[request_id];
1095
1096 if (command_que_value == 0) {
1097 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet physical address.\n");
1098 return 1;
1099 }
1100
1101 /* Send command packet to the board */
1102 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1103
1104 /* Poll for completion */
1105 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1106 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1107 request_id = TW_RESID_OUT(response_queue.response_id);
1108
1109 if (request_id != 0) {
1110 /* unexpected request id */
1111 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Unexpected request id.\n");
1112 return 1;
1113 }
1114 if (command_packet->status != 0) {
1115 /* bad response */
1116 tw_decode_sense(tw_dev, request_id, 0);
1117 return 1;
1118 }
1119 }
1120 return 0;
1121 } /* End tw_initconnection() */
1122
1123 /* Set a value in the features table */
1124 static int tw_setfeature(TW_Device_Extension *tw_dev, int parm, int param_size,
1125 unsigned char *val)
1126 {
1127 TW_Param *param;
1128 TW_Command *command_packet;
1129 TW_Response_Queue response_queue;
1130 int request_id = 0;
1131 unsigned long command_que_value;
1132 unsigned long param_value;
1133
1134 /* Initialize SetParam command packet */
1135 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1136 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet virtual address.\n");
1137 return 1;
1138 }
1139 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1140 memset(command_packet, 0, sizeof(TW_Sector));
1141 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1142
1143 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
1144 param->table_id = 0x404; /* Features table */
1145 param->parameter_id = parm;
1146 param->parameter_size_bytes = param_size;
1147 memcpy(param->data, val, param_size);
1148
1149 param_value = tw_dev->alignment_physical_address[request_id];
1150 if (param_value == 0) {
1151 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad alignment physical address.\n");
1152 tw_dev->state[request_id] = TW_S_COMPLETED;
1153 tw_state_request_finish(tw_dev, request_id);
1154 tw_dev->srb[request_id]->result = (DID_OK << 16);
1155 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1156 }
1157 command_packet->byte8.param.sgl[0].address = param_value;
1158 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1159
1160 command_packet->size = 4;
1161 command_packet->request_id = request_id;
1162 command_packet->byte6.parameter_count = 1;
1163
1164 command_que_value = tw_dev->command_packet_physical_address[request_id];
1165 if (command_que_value == 0) {
1166 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet physical address.\n");
1167 return 1;
1168 }
1169
1170 /* Send command packet to the board */
1171 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1172
1173 /* Poll for completion */
1174 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1175 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1176 request_id = TW_RESID_OUT(response_queue.response_id);
1177
1178 if (request_id != 0) {
1179 /* unexpected request id */
1180 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Unexpected request id.\n");
1181 return 1;
1182 }
1183 if (command_packet->status != 0) {
1184 /* bad response */
1185 tw_decode_sense(tw_dev, request_id, 0);
1186 return 1;
1187 }
1188 }
1189
1190 return 0;
1191 } /* End tw_setfeature() */
1192
1193 /* This function will reset a controller */
1194 static int tw_reset_sequence(TW_Device_Extension *tw_dev)
1195 {
1196 int error = 0;
1197 int tries = 0;
1198 unsigned char c = 1;
1199
1200 /* Reset the board */
1201 while (tries < TW_MAX_RESET_TRIES) {
1202 TW_SOFT_RESET(tw_dev);
1203
1204 error = tw_aen_drain_queue(tw_dev);
1205 if (error) {
1206 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN drain failed, retrying.\n", tw_dev->host->host_no);
1207 tries++;
1208 continue;
1209 }
1210
1211 /* Check for controller errors */
1212 if (tw_check_errors(tw_dev)) {
1213 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors found, retrying.\n", tw_dev->host->host_no);
1214 tries++;
1215 continue;
1216 }
1217
1218 /* Now the controller is in a good state */
1219 break;
1220 }
1221
1222 if (tries >= TW_MAX_RESET_TRIES) {
1223 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors, card not responding, check all cabling.\n", tw_dev->host->host_no);
1224 return 1;
1225 }
1226
1227 error = tw_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS);
1228 if (error) {
1229 printk(KERN_WARNING "3w-xxxx: scsi%d: Connection initialization failed.\n", tw_dev->host->host_no);
1230 return 1;
1231 }
1232
1233 error = tw_setfeature(tw_dev, 2, 1, &c);
1234 if (error) {
1235 printk(KERN_WARNING "3w-xxxx: Unable to set features for card, probable old firmware or card.\n");
1236 }
1237
1238 return 0;
1239 } /* End tw_reset_sequence() */
1240
1241 /* This function will initialize the fields of a device extension */
1242 static int tw_initialize_device_extension(TW_Device_Extension *tw_dev)
1243 {
1244 int i, error=0;
1245
1246 dprintk(KERN_NOTICE "3w-xxxx: tw_initialize_device_extension()\n");
1247
1248 /* Initialize command packet buffers */
1249 error = tw_allocate_memory(tw_dev, sizeof(TW_Command), 0);
1250 if (error) {
1251 printk(KERN_WARNING "3w-xxxx: Command packet memory allocation failed.\n");
1252 return 1;
1253 }
1254
1255 /* Initialize generic buffer */
1256 error = tw_allocate_memory(tw_dev, sizeof(TW_Sector), 1);
1257 if (error) {
1258 printk(KERN_WARNING "3w-xxxx: Generic memory allocation failed.\n");
1259 return 1;
1260 }
1261
1262 for (i=0;i<TW_Q_LENGTH;i++) {
1263 tw_dev->free_queue[i] = i;
1264 tw_dev->state[i] = TW_S_INITIAL;
1265 }
1266
1267 tw_dev->pending_head = TW_Q_START;
1268 tw_dev->pending_tail = TW_Q_START;
1269 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1270
1271 mutex_init(&tw_dev->ioctl_lock);
1272 init_waitqueue_head(&tw_dev->ioctl_wqueue);
1273
1274 return 0;
1275 } /* End tw_initialize_device_extension() */
1276
1277 /* This function will reset a device extension */
1278 static int tw_reset_device_extension(TW_Device_Extension *tw_dev)
1279 {
1280 int i = 0;
1281 struct scsi_cmnd *srb;
1282 unsigned long flags = 0;
1283
1284 dprintk(KERN_NOTICE "3w-xxxx: tw_reset_device_extension()\n");
1285
1286 set_bit(TW_IN_RESET, &tw_dev->flags);
1287 TW_DISABLE_INTERRUPTS(tw_dev);
1288 TW_MASK_COMMAND_INTERRUPT(tw_dev);
1289 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1290
1291 /* Abort all requests that are in progress */
1292 for (i=0;i<TW_Q_LENGTH;i++) {
1293 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1294 (tw_dev->state[i] != TW_S_INITIAL) &&
1295 (tw_dev->state[i] != TW_S_COMPLETED)) {
1296 srb = tw_dev->srb[i];
1297 if (srb != NULL) {
1298 srb->result = (DID_RESET << 16);
1299 scsi_dma_unmap(srb);
1300 srb->scsi_done(srb);
1301 }
1302 }
1303 }
1304
1305 /* Reset queues and counts */
1306 for (i=0;i<TW_Q_LENGTH;i++) {
1307 tw_dev->free_queue[i] = i;
1308 tw_dev->state[i] = TW_S_INITIAL;
1309 }
1310 tw_dev->free_head = TW_Q_START;
1311 tw_dev->free_tail = TW_Q_START;
1312 tw_dev->posted_request_count = 0;
1313 tw_dev->pending_request_count = 0;
1314 tw_dev->pending_head = TW_Q_START;
1315 tw_dev->pending_tail = TW_Q_START;
1316 tw_dev->reset_print = 0;
1317
1318 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1319
1320 if (tw_reset_sequence(tw_dev)) {
1321 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset sequence failed.\n", tw_dev->host->host_no);
1322 return 1;
1323 }
1324
1325 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
1326 clear_bit(TW_IN_RESET, &tw_dev->flags);
1327 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1328
1329 return 0;
1330 } /* End tw_reset_device_extension() */
1331
1332 /* This funciton returns unit geometry in cylinders/heads/sectors */
1333 static int tw_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev,
1334 sector_t capacity, int geom[])
1335 {
1336 int heads, sectors, cylinders;
1337 TW_Device_Extension *tw_dev;
1338
1339 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam()\n");
1340 tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
1341
1342 heads = 64;
1343 sectors = 32;
1344 cylinders = sector_div(capacity, heads * sectors);
1345
1346 if (capacity >= 0x200000) {
1347 heads = 255;
1348 sectors = 63;
1349 cylinders = sector_div(capacity, heads * sectors);
1350 }
1351
1352 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam(): heads = %d, sectors = %d, cylinders = %d\n", heads, sectors, cylinders);
1353 geom[0] = heads;
1354 geom[1] = sectors;
1355 geom[2] = cylinders;
1356
1357 return 0;
1358 } /* End tw_scsi_biosparam() */
1359
1360 /* This is the new scsi eh reset function */
1361 static int tw_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1362 {
1363 TW_Device_Extension *tw_dev=NULL;
1364 int retval = FAILED;
1365
1366 tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1367
1368 tw_dev->num_resets++;
1369
1370 sdev_printk(KERN_WARNING, SCpnt->device,
1371 "WARNING: Command (0x%x) timed out, resetting card.\n",
1372 SCpnt->cmnd[0]);
1373
1374 /* Make sure we are not issuing an ioctl or resetting from ioctl */
1375 mutex_lock(&tw_dev->ioctl_lock);
1376
1377 /* Now reset the card and some of the device extension data */
1378 if (tw_reset_device_extension(tw_dev)) {
1379 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset failed.\n", tw_dev->host->host_no);
1380 goto out;
1381 }
1382
1383 retval = SUCCESS;
1384 out:
1385 mutex_unlock(&tw_dev->ioctl_lock);
1386 return retval;
1387 } /* End tw_scsi_eh_reset() */
1388
1389 /* This function handles scsi inquiry commands */
1390 static int tw_scsiop_inquiry(TW_Device_Extension *tw_dev, int request_id)
1391 {
1392 TW_Param *param;
1393 TW_Command *command_packet;
1394 unsigned long command_que_value;
1395 unsigned long param_value;
1396
1397 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry()\n");
1398
1399 /* Initialize command packet */
1400 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1401 if (command_packet == NULL) {
1402 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet virtual address.\n");
1403 return 1;
1404 }
1405 memset(command_packet, 0, sizeof(TW_Sector));
1406 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1407 command_packet->size = 4;
1408 command_packet->request_id = request_id;
1409 command_packet->status = 0;
1410 command_packet->flags = 0;
1411 command_packet->byte6.parameter_count = 1;
1412
1413 /* Now setup the param */
1414 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1415 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment virtual address.\n");
1416 return 1;
1417 }
1418 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1419 memset(param, 0, sizeof(TW_Sector));
1420 param->table_id = 3; /* unit summary table */
1421 param->parameter_id = 3; /* unitsstatus parameter */
1422 param->parameter_size_bytes = TW_MAX_UNITS;
1423 param_value = tw_dev->alignment_physical_address[request_id];
1424 if (param_value == 0) {
1425 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment physical address.\n");
1426 return 1;
1427 }
1428
1429 command_packet->byte8.param.sgl[0].address = param_value;
1430 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1431 command_que_value = tw_dev->command_packet_physical_address[request_id];
1432 if (command_que_value == 0) {
1433 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet physical address.\n");
1434 return 1;
1435 }
1436
1437 /* Now try to post the command packet */
1438 tw_post_command_packet(tw_dev, request_id);
1439
1440 return 0;
1441 } /* End tw_scsiop_inquiry() */
1442
1443 static void tw_transfer_internal(TW_Device_Extension *tw_dev, int request_id,
1444 void *data, unsigned int len)
1445 {
1446 scsi_sg_copy_from_buffer(tw_dev->srb[request_id], data, len);
1447 }
1448
1449 /* This function is called by the isr to complete an inquiry command */
1450 static int tw_scsiop_inquiry_complete(TW_Device_Extension *tw_dev, int request_id)
1451 {
1452 unsigned char *is_unit_present;
1453 unsigned char request_buffer[36];
1454 TW_Param *param;
1455
1456 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry_complete()\n");
1457
1458 memset(request_buffer, 0, sizeof(request_buffer));
1459 request_buffer[0] = TYPE_DISK; /* Peripheral device type */
1460 request_buffer[1] = 0; /* Device type modifier */
1461 request_buffer[2] = 0; /* No ansi/iso compliance */
1462 request_buffer[4] = 31; /* Additional length */
1463 memcpy(&request_buffer[8], "3ware ", 8); /* Vendor ID */
1464 sprintf(&request_buffer[16], "Logical Disk %-2d ", tw_dev->srb[request_id]->device->id);
1465 memcpy(&request_buffer[32], TW_DRIVER_VERSION, 3);
1466 tw_transfer_internal(tw_dev, request_id, request_buffer,
1467 sizeof(request_buffer));
1468
1469 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1470 if (param == NULL) {
1471 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry_complete(): Bad alignment virtual address.\n");
1472 return 1;
1473 }
1474 is_unit_present = &(param->data[0]);
1475
1476 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1477 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1478 } else {
1479 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1480 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1481 return TW_ISR_DONT_RESULT;
1482 }
1483
1484 return 0;
1485 } /* End tw_scsiop_inquiry_complete() */
1486
1487 /* This function handles scsi mode_sense commands */
1488 static int tw_scsiop_mode_sense(TW_Device_Extension *tw_dev, int request_id)
1489 {
1490 TW_Param *param;
1491 TW_Command *command_packet;
1492 unsigned long command_que_value;
1493 unsigned long param_value;
1494
1495 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense()\n");
1496
1497 /* Only page control = 0, page code = 0x8 (cache page) supported */
1498 if (tw_dev->srb[request_id]->cmnd[2] != 0x8) {
1499 tw_dev->state[request_id] = TW_S_COMPLETED;
1500 tw_state_request_finish(tw_dev, request_id);
1501 tw_dev->srb[request_id]->result = (DID_OK << 16);
1502 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1503 return 0;
1504 }
1505
1506 /* Now read firmware cache setting for this unit */
1507 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1508 if (command_packet == NULL) {
1509 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet virtual address.\n");
1510 return 1;
1511 }
1512
1513 /* Setup the command packet */
1514 memset(command_packet, 0, sizeof(TW_Sector));
1515 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1516 command_packet->size = 4;
1517 command_packet->request_id = request_id;
1518 command_packet->status = 0;
1519 command_packet->flags = 0;
1520 command_packet->byte6.parameter_count = 1;
1521
1522 /* Setup the param */
1523 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1524 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment virtual address.\n");
1525 return 1;
1526 }
1527
1528 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1529 memset(param, 0, sizeof(TW_Sector));
1530 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE + tw_dev->srb[request_id]->device->id;
1531 param->parameter_id = 7; /* unit flags */
1532 param->parameter_size_bytes = 1;
1533 param_value = tw_dev->alignment_physical_address[request_id];
1534 if (param_value == 0) {
1535 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment physical address.\n");
1536 return 1;
1537 }
1538
1539 command_packet->byte8.param.sgl[0].address = param_value;
1540 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1541 command_que_value = tw_dev->command_packet_physical_address[request_id];
1542 if (command_que_value == 0) {
1543 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet physical address.\n");
1544 return 1;
1545 }
1546
1547 /* Now try to post the command packet */
1548 tw_post_command_packet(tw_dev, request_id);
1549
1550 return 0;
1551 } /* End tw_scsiop_mode_sense() */
1552
1553 /* This function is called by the isr to complete a mode sense command */
1554 static int tw_scsiop_mode_sense_complete(TW_Device_Extension *tw_dev, int request_id)
1555 {
1556 TW_Param *param;
1557 unsigned char *flags;
1558 unsigned char request_buffer[8];
1559
1560 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense_complete()\n");
1561
1562 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1563 if (param == NULL) {
1564 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense_complete(): Bad alignment virtual address.\n");
1565 return 1;
1566 }
1567 flags = (char *)&(param->data[0]);
1568 memset(request_buffer, 0, sizeof(request_buffer));
1569
1570 request_buffer[0] = 0xf; /* mode data length */
1571 request_buffer[1] = 0; /* default medium type */
1572 request_buffer[2] = 0x10; /* dpo/fua support on */
1573 request_buffer[3] = 0; /* no block descriptors */
1574 request_buffer[4] = 0x8; /* caching page */
1575 request_buffer[5] = 0xa; /* page length */
1576 if (*flags & 0x1)
1577 request_buffer[6] = 0x5; /* WCE on, RCD on */
1578 else
1579 request_buffer[6] = 0x1; /* WCE off, RCD on */
1580 tw_transfer_internal(tw_dev, request_id, request_buffer,
1581 sizeof(request_buffer));
1582
1583 return 0;
1584 } /* End tw_scsiop_mode_sense_complete() */
1585
1586 /* This function handles scsi read_capacity commands */
1587 static int tw_scsiop_read_capacity(TW_Device_Extension *tw_dev, int request_id)
1588 {
1589 TW_Param *param;
1590 TW_Command *command_packet;
1591 unsigned long command_que_value;
1592 unsigned long param_value;
1593
1594 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity()\n");
1595
1596 /* Initialize command packet */
1597 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1598
1599 if (command_packet == NULL) {
1600 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet virtual address.\n");
1601 return 1;
1602 }
1603 memset(command_packet, 0, sizeof(TW_Sector));
1604 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1605 command_packet->size = 4;
1606 command_packet->request_id = request_id;
1607 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1608 command_packet->status = 0;
1609 command_packet->flags = 0;
1610 command_packet->byte6.block_count = 1;
1611
1612 /* Now setup the param */
1613 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1614 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment virtual address.\n");
1615 return 1;
1616 }
1617 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1618 memset(param, 0, sizeof(TW_Sector));
1619 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE +
1620 tw_dev->srb[request_id]->device->id;
1621 param->parameter_id = 4; /* unitcapacity parameter */
1622 param->parameter_size_bytes = 4;
1623 param_value = tw_dev->alignment_physical_address[request_id];
1624 if (param_value == 0) {
1625 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment physical address.\n");
1626 return 1;
1627 }
1628
1629 command_packet->byte8.param.sgl[0].address = param_value;
1630 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1631 command_que_value = tw_dev->command_packet_physical_address[request_id];
1632 if (command_que_value == 0) {
1633 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet physical address.\n");
1634 return 1;
1635 }
1636
1637 /* Now try to post the command to the board */
1638 tw_post_command_packet(tw_dev, request_id);
1639
1640 return 0;
1641 } /* End tw_scsiop_read_capacity() */
1642
1643 /* This function is called by the isr to complete a readcapacity command */
1644 static int tw_scsiop_read_capacity_complete(TW_Device_Extension *tw_dev, int request_id)
1645 {
1646 unsigned char *param_data;
1647 u32 capacity;
1648 char buff[8];
1649 TW_Param *param;
1650
1651 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete()\n");
1652
1653 memset(buff, 0, sizeof(buff));
1654 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1655 if (param == NULL) {
1656 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_capacity_complete(): Bad alignment virtual address.\n");
1657 return 1;
1658 }
1659 param_data = &(param->data[0]);
1660
1661 capacity = (param_data[3] << 24) | (param_data[2] << 16) |
1662 (param_data[1] << 8) | param_data[0];
1663
1664 /* Subtract one sector to fix get last sector ioctl */
1665 capacity -= 1;
1666
1667 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete(): Capacity = 0x%x.\n", capacity);
1668
1669 /* Number of LBA's */
1670 buff[0] = (capacity >> 24);
1671 buff[1] = (capacity >> 16) & 0xff;
1672 buff[2] = (capacity >> 8) & 0xff;
1673 buff[3] = capacity & 0xff;
1674
1675 /* Block size in bytes (512) */
1676 buff[4] = (TW_BLOCK_SIZE >> 24);
1677 buff[5] = (TW_BLOCK_SIZE >> 16) & 0xff;
1678 buff[6] = (TW_BLOCK_SIZE >> 8) & 0xff;
1679 buff[7] = TW_BLOCK_SIZE & 0xff;
1680
1681 tw_transfer_internal(tw_dev, request_id, buff, sizeof(buff));
1682
1683 return 0;
1684 } /* End tw_scsiop_read_capacity_complete() */
1685
1686 /* This function handles scsi read or write commands */
1687 static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id)
1688 {
1689 TW_Command *command_packet;
1690 unsigned long command_que_value;
1691 u32 lba = 0x0, num_sectors = 0x0;
1692 int i, use_sg;
1693 struct scsi_cmnd *srb;
1694 struct scatterlist *sglist, *sg;
1695
1696 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write()\n");
1697
1698 srb = tw_dev->srb[request_id];
1699
1700 sglist = scsi_sglist(srb);
1701 if (!sglist) {
1702 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Request buffer NULL.\n");
1703 return 1;
1704 }
1705
1706 /* Initialize command packet */
1707 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1708 if (command_packet == NULL) {
1709 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): Bad command packet virtual address.\n");
1710 return 1;
1711 }
1712
1713 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == READ_10) {
1714 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_READ);
1715 } else {
1716 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_WRITE);
1717 }
1718
1719 command_packet->size = 3;
1720 command_packet->request_id = request_id;
1721 command_packet->unit__hostid = TW_UNITHOST_IN(0, srb->device->id);
1722 command_packet->status = 0;
1723 command_packet->flags = 0;
1724
1725 if (srb->cmnd[0] == WRITE_10) {
1726 if ((srb->cmnd[1] & 0x8) || (srb->cmnd[1] & 0x10))
1727 command_packet->flags = 1;
1728 }
1729
1730 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6) {
1731 lba = ((u32)srb->cmnd[1] << 16) | ((u32)srb->cmnd[2] << 8) | (u32)srb->cmnd[3];
1732 num_sectors = (u32)srb->cmnd[4];
1733 } else {
1734 lba = ((u32)srb->cmnd[2] << 24) | ((u32)srb->cmnd[3] << 16) | ((u32)srb->cmnd[4] << 8) | (u32)srb->cmnd[5];
1735 num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
1736 }
1737
1738 /* Update sector statistic */
1739 tw_dev->sector_count = num_sectors;
1740 if (tw_dev->sector_count > tw_dev->max_sector_count)
1741 tw_dev->max_sector_count = tw_dev->sector_count;
1742
1743 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): lba = 0x%x num_sectors = 0x%x\n", lba, num_sectors);
1744 command_packet->byte8.io.lba = lba;
1745 command_packet->byte6.block_count = num_sectors;
1746
1747 use_sg = scsi_dma_map(srb);
1748 if (use_sg <= 0)
1749 return 1;
1750
1751 scsi_for_each_sg(tw_dev->srb[request_id], sg, use_sg, i) {
1752 command_packet->byte8.io.sgl[i].address = sg_dma_address(sg);
1753 command_packet->byte8.io.sgl[i].length = sg_dma_len(sg);
1754 command_packet->size+=2;
1755 }
1756
1757 /* Update SG statistics */
1758 tw_dev->sgl_entries = scsi_sg_count(tw_dev->srb[request_id]);
1759 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
1760 tw_dev->max_sgl_entries = tw_dev->sgl_entries;
1761
1762 command_que_value = tw_dev->command_packet_physical_address[request_id];
1763 if (command_que_value == 0) {
1764 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Bad command packet physical address.\n");
1765 return 1;
1766 }
1767
1768 /* Now try to post the command to the board */
1769 tw_post_command_packet(tw_dev, request_id);
1770
1771 return 0;
1772 } /* End tw_scsiop_read_write() */
1773
1774 /* This function will handle the request sense scsi command */
1775 static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id)
1776 {
1777 char request_buffer[18];
1778
1779 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n");
1780
1781 memset(request_buffer, 0, sizeof(request_buffer));
1782 request_buffer[0] = 0x70; /* Immediate fixed format */
1783 request_buffer[7] = 10; /* minimum size per SPC: 18 bytes */
1784 /* leave all other fields zero, giving effectively NO_SENSE return */
1785 tw_transfer_internal(tw_dev, request_id, request_buffer,
1786 sizeof(request_buffer));
1787
1788 tw_dev->state[request_id] = TW_S_COMPLETED;
1789 tw_state_request_finish(tw_dev, request_id);
1790
1791 /* If we got a request_sense, we probably want a reset, return error */
1792 tw_dev->srb[request_id]->result = (DID_ERROR << 16);
1793 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1794
1795 return 0;
1796 } /* End tw_scsiop_request_sense() */
1797
1798 /* This function will handle synchronize cache scsi command */
1799 static int tw_scsiop_synchronize_cache(TW_Device_Extension *tw_dev, int request_id)
1800 {
1801 TW_Command *command_packet;
1802 unsigned long command_que_value;
1803
1804 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_synchronize_cache()\n");
1805
1806 /* Send firmware flush command for this unit */
1807 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1808 if (command_packet == NULL) {
1809 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet virtual address.\n");
1810 return 1;
1811 }
1812
1813 /* Setup the command packet */
1814 memset(command_packet, 0, sizeof(TW_Sector));
1815 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_FLUSH_CACHE);
1816 command_packet->size = 2;
1817 command_packet->request_id = request_id;
1818 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1819 command_packet->status = 0;
1820 command_packet->flags = 0;
1821 command_packet->byte6.parameter_count = 1;
1822 command_que_value = tw_dev->command_packet_physical_address[request_id];
1823 if (command_que_value == 0) {
1824 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet physical address.\n");
1825 return 1;
1826 }
1827
1828 /* Now try to post the command packet */
1829 tw_post_command_packet(tw_dev, request_id);
1830
1831 return 0;
1832 } /* End tw_scsiop_synchronize_cache() */
1833
1834 /* This function will handle test unit ready scsi command */
1835 static int tw_scsiop_test_unit_ready(TW_Device_Extension *tw_dev, int request_id)
1836 {
1837 TW_Param *param;
1838 TW_Command *command_packet;
1839 unsigned long command_que_value;
1840 unsigned long param_value;
1841
1842 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_test_unit_ready()\n");
1843
1844 /* Initialize command packet */
1845 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1846 if (command_packet == NULL) {
1847 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet virtual address.\n");
1848 return 1;
1849 }
1850 memset(command_packet, 0, sizeof(TW_Sector));
1851 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1852 command_packet->size = 4;
1853 command_packet->request_id = request_id;
1854 command_packet->status = 0;
1855 command_packet->flags = 0;
1856 command_packet->byte6.parameter_count = 1;
1857
1858 /* Now setup the param */
1859 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1860 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment virtual address.\n");
1861 return 1;
1862 }
1863 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1864 memset(param, 0, sizeof(TW_Sector));
1865 param->table_id = 3; /* unit summary table */
1866 param->parameter_id = 3; /* unitsstatus parameter */
1867 param->parameter_size_bytes = TW_MAX_UNITS;
1868 param_value = tw_dev->alignment_physical_address[request_id];
1869 if (param_value == 0) {
1870 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment physical address.\n");
1871 return 1;
1872 }
1873
1874 command_packet->byte8.param.sgl[0].address = param_value;
1875 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1876 command_que_value = tw_dev->command_packet_physical_address[request_id];
1877 if (command_que_value == 0) {
1878 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet physical address.\n");
1879 return 1;
1880 }
1881
1882 /* Now try to post the command packet */
1883 tw_post_command_packet(tw_dev, request_id);
1884
1885 return 0;
1886 } /* End tw_scsiop_test_unit_ready() */
1887
1888 /* This function is called by the isr to complete a testunitready command */
1889 static int tw_scsiop_test_unit_ready_complete(TW_Device_Extension *tw_dev, int request_id)
1890 {
1891 unsigned char *is_unit_present;
1892 TW_Param *param;
1893
1894 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete()\n");
1895
1896 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1897 if (param == NULL) {
1898 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete(): Bad alignment virtual address.\n");
1899 return 1;
1900 }
1901 is_unit_present = &(param->data[0]);
1902
1903 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1904 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1905 } else {
1906 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1907 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1908 return TW_ISR_DONT_RESULT;
1909 }
1910
1911 return 0;
1912 } /* End tw_scsiop_test_unit_ready_complete() */
1913
1914 /* This is the main scsi queue function to handle scsi opcodes */
1915 static int tw_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
1916 {
1917 unsigned char *command = SCpnt->cmnd;
1918 int request_id = 0;
1919 int retval = 1;
1920 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1921
1922 /* If we are resetting due to timed out ioctl, report as busy */
1923 if (test_bit(TW_IN_RESET, &tw_dev->flags))
1924 return SCSI_MLQUEUE_HOST_BUSY;
1925
1926 /* Save done function into Scsi_Cmnd struct */
1927 SCpnt->scsi_done = done;
1928
1929 /* Queue the command and get a request id */
1930 tw_state_request_start(tw_dev, &request_id);
1931
1932 /* Save the scsi command for use by the ISR */
1933 tw_dev->srb[request_id] = SCpnt;
1934
1935 switch (*command) {
1936 case READ_10:
1937 case READ_6:
1938 case WRITE_10:
1939 case WRITE_6:
1940 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ/WRITE.\n");
1941 retval = tw_scsiop_read_write(tw_dev, request_id);
1942 break;
1943 case TEST_UNIT_READY:
1944 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught TEST_UNIT_READY.\n");
1945 retval = tw_scsiop_test_unit_ready(tw_dev, request_id);
1946 break;
1947 case INQUIRY:
1948 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught INQUIRY.\n");
1949 retval = tw_scsiop_inquiry(tw_dev, request_id);
1950 break;
1951 case READ_CAPACITY:
1952 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ_CAPACITY.\n");
1953 retval = tw_scsiop_read_capacity(tw_dev, request_id);
1954 break;
1955 case REQUEST_SENSE:
1956 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught REQUEST_SENSE.\n");
1957 retval = tw_scsiop_request_sense(tw_dev, request_id);
1958 break;
1959 case MODE_SENSE:
1960 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught MODE_SENSE.\n");
1961 retval = tw_scsiop_mode_sense(tw_dev, request_id);
1962 break;
1963 case SYNCHRONIZE_CACHE:
1964 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught SYNCHRONIZE_CACHE.\n");
1965 retval = tw_scsiop_synchronize_cache(tw_dev, request_id);
1966 break;
1967 case TW_IOCTL:
1968 printk(KERN_WARNING "3w-xxxx: SCSI_IOCTL_SEND_COMMAND deprecated, please update your 3ware tools.\n");
1969 break;
1970 default:
1971 printk(KERN_NOTICE "3w-xxxx: scsi%d: Unknown scsi opcode: 0x%x\n", tw_dev->host->host_no, *command);
1972 tw_dev->state[request_id] = TW_S_COMPLETED;
1973 tw_state_request_finish(tw_dev, request_id);
1974 SCpnt->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1975 scsi_build_sense_buffer(1, SCpnt->sense_buffer, ILLEGAL_REQUEST, 0x20, 0);
1976 done(SCpnt);
1977 retval = 0;
1978 }
1979 if (retval) {
1980 tw_dev->state[request_id] = TW_S_COMPLETED;
1981 tw_state_request_finish(tw_dev, request_id);
1982 SCpnt->result = (DID_ERROR << 16);
1983 done(SCpnt);
1984 retval = 0;
1985 }
1986 return retval;
1987 } /* End tw_scsi_queue() */
1988
1989 static DEF_SCSI_QCMD(tw_scsi_queue)
1990
1991 /* This function is the interrupt service routine */
1992 static irqreturn_t tw_interrupt(int irq, void *dev_instance)
1993 {
1994 int request_id;
1995 u32 status_reg_value;
1996 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
1997 TW_Response_Queue response_que;
1998 int error = 0, retval = 0;
1999 TW_Command *command_packet;
2000 int handled = 0;
2001
2002 /* Get the host lock for io completions */
2003 spin_lock(tw_dev->host->host_lock);
2004
2005 /* Read the registers */
2006 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2007
2008 /* Check if this is our interrupt, otherwise bail */
2009 if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
2010 goto tw_interrupt_bail;
2011
2012 handled = 1;
2013
2014 /* If we are resetting, bail */
2015 if (test_bit(TW_IN_RESET, &tw_dev->flags))
2016 goto tw_interrupt_bail;
2017
2018 /* Check controller for errors */
2019 if (tw_check_bits(status_reg_value)) {
2020 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2021 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2022 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2023 goto tw_interrupt_bail;
2024 }
2025 }
2026
2027 /* Handle host interrupt */
2028 if (status_reg_value & TW_STATUS_HOST_INTERRUPT) {
2029 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received host interrupt.\n");
2030 TW_CLEAR_HOST_INTERRUPT(tw_dev);
2031 }
2032
2033 /* Handle attention interrupt */
2034 if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
2035 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received attention interrupt.\n");
2036 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
2037 tw_state_request_start(tw_dev, &request_id);
2038 error = tw_aen_read_queue(tw_dev, request_id);
2039 if (error) {
2040 printk(KERN_WARNING "3w-xxxx: scsi%d: Error reading aen queue.\n", tw_dev->host->host_no);
2041 tw_dev->state[request_id] = TW_S_COMPLETED;
2042 tw_state_request_finish(tw_dev, request_id);
2043 }
2044 }
2045
2046 /* Handle command interrupt */
2047 if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
2048 /* Drain as many pending commands as we can */
2049 while (tw_dev->pending_request_count > 0) {
2050 request_id = tw_dev->pending_queue[tw_dev->pending_head];
2051 if (tw_dev->state[request_id] != TW_S_PENDING) {
2052 printk(KERN_WARNING "3w-xxxx: scsi%d: Found request id that wasn't pending.\n", tw_dev->host->host_no);
2053 break;
2054 }
2055 if (tw_post_command_packet(tw_dev, request_id)==0) {
2056 if (tw_dev->pending_head == TW_Q_LENGTH-1) {
2057 tw_dev->pending_head = TW_Q_START;
2058 } else {
2059 tw_dev->pending_head = tw_dev->pending_head + 1;
2060 }
2061 tw_dev->pending_request_count--;
2062 } else {
2063 /* If we get here, we will continue re-posting on the next command interrupt */
2064 break;
2065 }
2066 }
2067 /* If there are no more pending requests, we mask command interrupt */
2068 if (tw_dev->pending_request_count == 0)
2069 TW_MASK_COMMAND_INTERRUPT(tw_dev);
2070 }
2071
2072 /* Handle response interrupt */
2073 if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
2074 /* Drain the response queue from the board */
2075 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
2076 /* Read response queue register */
2077 response_que.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
2078 request_id = TW_RESID_OUT(response_que.response_id);
2079 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
2080 error = 0;
2081
2082 /* Check for bad response */
2083 if (command_packet->status != 0) {
2084 /* If internal command, don't error, don't fill sense */
2085 if (tw_dev->srb[request_id] == NULL) {
2086 tw_decode_sense(tw_dev, request_id, 0);
2087 } else {
2088 error = tw_decode_sense(tw_dev, request_id, 1);
2089 }
2090 }
2091
2092 /* Check for correct state */
2093 if (tw_dev->state[request_id] != TW_S_POSTED) {
2094 if (tw_dev->srb[request_id] != NULL) {
2095 printk(KERN_WARNING "3w-xxxx: scsi%d: Received a request id that wasn't posted.\n", tw_dev->host->host_no);
2096 error = 1;
2097 }
2098 }
2099
2100 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Response queue request id: %d.\n", request_id);
2101
2102 /* Check for internal command completion */
2103 if (tw_dev->srb[request_id] == NULL) {
2104 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Found internally posted command.\n");
2105 /* Check for chrdev ioctl completion */
2106 if (request_id != tw_dev->chrdev_request_id) {
2107 retval = tw_aen_complete(tw_dev, request_id);
2108 if (retval) {
2109 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing aen.\n", tw_dev->host->host_no);
2110 }
2111 } else {
2112 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
2113 wake_up(&tw_dev->ioctl_wqueue);
2114 }
2115 } else {
2116 switch (tw_dev->srb[request_id]->cmnd[0]) {
2117 case READ_10:
2118 case READ_6:
2119 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_10/READ_6\n");
2120 break;
2121 case WRITE_10:
2122 case WRITE_6:
2123 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught WRITE_10/WRITE_6\n");
2124 break;
2125 case TEST_UNIT_READY:
2126 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught TEST_UNIT_READY\n");
2127 error = tw_scsiop_test_unit_ready_complete(tw_dev, request_id);
2128 break;
2129 case INQUIRY:
2130 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught INQUIRY\n");
2131 error = tw_scsiop_inquiry_complete(tw_dev, request_id);
2132 break;
2133 case READ_CAPACITY:
2134 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_CAPACITY\n");
2135 error = tw_scsiop_read_capacity_complete(tw_dev, request_id);
2136 break;
2137 case MODE_SENSE:
2138 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught MODE_SENSE\n");
2139 error = tw_scsiop_mode_sense_complete(tw_dev, request_id);
2140 break;
2141 case SYNCHRONIZE_CACHE:
2142 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught SYNCHRONIZE_CACHE\n");
2143 break;
2144 default:
2145 printk(KERN_WARNING "3w-xxxx: case slip in tw_interrupt()\n");
2146 error = 1;
2147 }
2148
2149 /* If no error command was a success */
2150 if (error == 0) {
2151 tw_dev->srb[request_id]->result = (DID_OK << 16);
2152 }
2153
2154 /* If error, command failed */
2155 if (error == 1) {
2156 /* Ask for a host reset */
2157 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
2158 }
2159
2160 /* Now complete the io */
2161 if ((error != TW_ISR_DONT_COMPLETE)) {
2162 scsi_dma_unmap(tw_dev->srb[request_id]);
2163 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
2164 tw_dev->state[request_id] = TW_S_COMPLETED;
2165 tw_state_request_finish(tw_dev, request_id);
2166 tw_dev->posted_request_count--;
2167 }
2168 }
2169
2170 /* Check for valid status after each drain */
2171 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2172 if (tw_check_bits(status_reg_value)) {
2173 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2174 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2175 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2176 goto tw_interrupt_bail;
2177 }
2178 }
2179 }
2180 }
2181
2182 tw_interrupt_bail:
2183 spin_unlock(tw_dev->host->host_lock);
2184 return IRQ_RETVAL(handled);
2185 } /* End tw_interrupt() */
2186
2187 /* This function tells the controller to shut down */
2188 static void __tw_shutdown(TW_Device_Extension *tw_dev)
2189 {
2190 /* Disable interrupts */
2191 TW_DISABLE_INTERRUPTS(tw_dev);
2192
2193 /* Free up the IRQ */
2194 free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
2195
2196 printk(KERN_WARNING "3w-xxxx: Shutting down host %d.\n", tw_dev->host->host_no);
2197
2198 /* Tell the card we are shutting down */
2199 if (tw_initconnection(tw_dev, 1)) {
2200 printk(KERN_WARNING "3w-xxxx: Connection shutdown failed.\n");
2201 } else {
2202 printk(KERN_WARNING "3w-xxxx: Shutdown complete.\n");
2203 }
2204
2205 /* Clear all interrupts just before exit */
2206 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2207 } /* End __tw_shutdown() */
2208
2209 /* Wrapper for __tw_shutdown */
2210 static void tw_shutdown(struct pci_dev *pdev)
2211 {
2212 struct Scsi_Host *host = pci_get_drvdata(pdev);
2213 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2214
2215 __tw_shutdown(tw_dev);
2216 } /* End tw_shutdown() */
2217
2218 /* This function gets called when a disk is coming online */
2219 static int tw_slave_configure(struct scsi_device *sdev)
2220 {
2221 /* Force 60 second timeout */
2222 blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
2223
2224 return 0;
2225 } /* End tw_slave_configure() */
2226
2227 static struct scsi_host_template driver_template = {
2228 .module = THIS_MODULE,
2229 .name = "3ware Storage Controller",
2230 .queuecommand = tw_scsi_queue,
2231 .eh_host_reset_handler = tw_scsi_eh_reset,
2232 .bios_param = tw_scsi_biosparam,
2233 .change_queue_depth = scsi_change_queue_depth,
2234 .can_queue = TW_Q_LENGTH-2,
2235 .slave_configure = tw_slave_configure,
2236 .this_id = -1,
2237 .sg_tablesize = TW_MAX_SGL_LENGTH,
2238 .max_sectors = TW_MAX_SECTORS,
2239 .cmd_per_lun = TW_MAX_CMDS_PER_LUN,
2240 .use_clustering = ENABLE_CLUSTERING,
2241 .shost_attrs = tw_host_attrs,
2242 .emulated = 1,
2243 .no_write_same = 1,
2244 };
2245
2246 /* This function will probe and initialize a card */
2247 static int tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
2248 {
2249 struct Scsi_Host *host = NULL;
2250 TW_Device_Extension *tw_dev;
2251 int retval = -ENODEV;
2252
2253 retval = pci_enable_device(pdev);
2254 if (retval) {
2255 printk(KERN_WARNING "3w-xxxx: Failed to enable pci device.");
2256 goto out_disable_device;
2257 }
2258
2259 pci_set_master(pdev);
2260
2261 retval = pci_set_dma_mask(pdev, TW_DMA_MASK);
2262 if (retval) {
2263 printk(KERN_WARNING "3w-xxxx: Failed to set dma mask.");
2264 goto out_disable_device;
2265 }
2266
2267 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2268 if (!host) {
2269 printk(KERN_WARNING "3w-xxxx: Failed to allocate memory for device extension.");
2270 retval = -ENOMEM;
2271 goto out_disable_device;
2272 }
2273 tw_dev = (TW_Device_Extension *)host->hostdata;
2274
2275 /* Save values to device extension */
2276 tw_dev->host = host;
2277 tw_dev->tw_pci_dev = pdev;
2278
2279 if (tw_initialize_device_extension(tw_dev)) {
2280 printk(KERN_WARNING "3w-xxxx: Failed to initialize device extension.");
2281 goto out_free_device_extension;
2282 }
2283
2284 /* Request IO regions */
2285 retval = pci_request_regions(pdev, "3w-xxxx");
2286 if (retval) {
2287 printk(KERN_WARNING "3w-xxxx: Failed to get mem region.");
2288 goto out_free_device_extension;
2289 }
2290
2291 /* Save base address */
2292 tw_dev->base_addr = pci_resource_start(pdev, 0);
2293 if (!tw_dev->base_addr) {
2294 printk(KERN_WARNING "3w-xxxx: Failed to get io address.");
2295 goto out_release_mem_region;
2296 }
2297
2298 /* Disable interrupts on the card */
2299 TW_DISABLE_INTERRUPTS(tw_dev);
2300
2301 /* Initialize the card */
2302 if (tw_reset_sequence(tw_dev))
2303 goto out_release_mem_region;
2304
2305 /* Set host specific parameters */
2306 host->max_id = TW_MAX_UNITS;
2307 host->max_cmd_len = TW_MAX_CDB_LEN;
2308
2309 /* Luns and channels aren't supported by adapter */
2310 host->max_lun = 0;
2311 host->max_channel = 0;
2312
2313 /* Register the card with the kernel SCSI layer */
2314 retval = scsi_add_host(host, &pdev->dev);
2315 if (retval) {
2316 printk(KERN_WARNING "3w-xxxx: scsi add host failed");
2317 goto out_release_mem_region;
2318 }
2319
2320 pci_set_drvdata(pdev, host);
2321
2322 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);
2323
2324 /* Now setup the interrupt handler */
2325 retval = request_irq(pdev->irq, tw_interrupt, IRQF_SHARED, "3w-xxxx", tw_dev);
2326 if (retval) {
2327 printk(KERN_WARNING "3w-xxxx: Error requesting IRQ.");
2328 goto out_remove_host;
2329 }
2330
2331 tw_device_extension_list[tw_device_extension_count] = tw_dev;
2332 tw_device_extension_count++;
2333
2334 /* Re-enable interrupts on the card */
2335 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2336
2337 /* Finally, scan the host */
2338 scsi_scan_host(host);
2339
2340 if (twe_major == -1) {
2341 if ((twe_major = register_chrdev (0, "twe", &tw_fops)) < 0)
2342 printk(KERN_WARNING "3w-xxxx: Failed to register character device.");
2343 }
2344 return 0;
2345
2346 out_remove_host:
2347 scsi_remove_host(host);
2348 out_release_mem_region:
2349 pci_release_regions(pdev);
2350 out_free_device_extension:
2351 tw_free_device_extension(tw_dev);
2352 scsi_host_put(host);
2353 out_disable_device:
2354 pci_disable_device(pdev);
2355
2356 return retval;
2357 } /* End tw_probe() */
2358
2359 /* This function is called to remove a device */
2360 static void tw_remove(struct pci_dev *pdev)
2361 {
2362 struct Scsi_Host *host = pci_get_drvdata(pdev);
2363 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2364
2365 scsi_remove_host(tw_dev->host);
2366
2367 /* Unregister character device */
2368 if (twe_major >= 0) {
2369 unregister_chrdev(twe_major, "twe");
2370 twe_major = -1;
2371 }
2372
2373 /* Shutdown the card */
2374 __tw_shutdown(tw_dev);
2375
2376 /* Free up the mem region */
2377 pci_release_regions(pdev);
2378
2379 /* Free up device extension resources */
2380 tw_free_device_extension(tw_dev);
2381
2382 scsi_host_put(tw_dev->host);
2383 pci_disable_device(pdev);
2384 tw_device_extension_count--;
2385 } /* End tw_remove() */
2386
2387 /* PCI Devices supported by this driver */
2388 static struct pci_device_id tw_pci_tbl[] = {
2389 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_1000,
2390 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2391 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_7000,
2392 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2393 { }
2394 };
2395 MODULE_DEVICE_TABLE(pci, tw_pci_tbl);
2396
2397 /* pci_driver initializer */
2398 static struct pci_driver tw_driver = {
2399 .name = "3w-xxxx",
2400 .id_table = tw_pci_tbl,
2401 .probe = tw_probe,
2402 .remove = tw_remove,
2403 .shutdown = tw_shutdown,
2404 };
2405
2406 /* This function is called on driver initialization */
2407 static int __init tw_init(void)
2408 {
2409 printk(KERN_WARNING "3ware Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2410
2411 return pci_register_driver(&tw_driver);
2412 } /* End tw_init() */
2413
2414 /* This function is called on driver exit */
2415 static void __exit tw_exit(void)
2416 {
2417 pci_unregister_driver(&tw_driver);
2418 } /* End tw_exit() */
2419
2420 module_init(tw_init);
2421 module_exit(tw_exit);
2422
Linux with added FPC-III support