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[NET_SCHED]: sch_htb: use hrtimer based watchdog
[linux-2.6.22.y-op.git] / drivers / scsi / 3w-xxxx.c
blob656bdb1352d8d8ee44991ecb8e2ca75f0f5b05a6
1 /*
2 3w-xxxx.c -- 3ware Storage Controller device driver for Linux.
3
4 Written By: Adam Radford <linuxraid@amcc.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) 1999-2007 3ware Inc.
10
11 Kernel compatiblity 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@amcc.com
51
52 For more information, goto:
53 http://www.amcc.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 */
198
199 #include <linux/module.h>
200 #include <linux/reboot.h>
201 #include <linux/spinlock.h>
202 #include <linux/interrupt.h>
203 #include <linux/moduleparam.h>
204 #include <linux/errno.h>
205 #include <linux/types.h>
206 #include <linux/delay.h>
207 #include <linux/pci.h>
208 #include <linux/time.h>
209 #include <linux/mutex.h>
210 #include <asm/io.h>
211 #include <asm/irq.h>
212 #include <asm/uaccess.h>
213 #include <scsi/scsi.h>
214 #include <scsi/scsi_host.h>
215 #include <scsi/scsi_tcq.h>
216 #include <scsi/scsi_cmnd.h>
217 #include "3w-xxxx.h"
218
219 /* Globals */
220 #define TW_DRIVER_VERSION "1.26.02.002"
221 static TW_Device_Extension *tw_device_extension_list[TW_MAX_SLOT];
222 static int tw_device_extension_count = 0;
223 static int twe_major = -1;
224
225 /* Module parameters */
226 MODULE_AUTHOR("AMCC");
227 MODULE_DESCRIPTION("3ware Storage Controller Linux Driver");
228 MODULE_LICENSE("GPL");
229 MODULE_VERSION(TW_DRIVER_VERSION);
230
231 /* Function prototypes */
232 static int tw_reset_device_extension(TW_Device_Extension *tw_dev);
233
234 /* Functions */
235
236 /* This function will check the status register for unexpected bits */
237 static int tw_check_bits(u32 status_reg_value)
238 {
239 if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS) {
240 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): No expected bits (0x%x).\n", status_reg_value);
241 return 1;
242 }
243 if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0) {
244 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): Found unexpected bits (0x%x).\n", status_reg_value);
245 return 1;
246 }
247
248 return 0;
249 } /* End tw_check_bits() */
250
251 /* This function will print readable messages from status register errors */
252 static int tw_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value, int print_host)
253 {
254 char host[16];
255
256 dprintk(KERN_WARNING "3w-xxxx: tw_decode_bits()\n");
257
258 if (print_host)
259 sprintf(host, " scsi%d:", tw_dev->host->host_no);
260 else
261 host[0] = '\0';
262
263 if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) {
264 printk(KERN_WARNING "3w-xxxx:%s PCI Parity Error: clearing.\n", host);
265 outl(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
266 }
267
268 if (status_reg_value & TW_STATUS_PCI_ABORT) {
269 printk(KERN_WARNING "3w-xxxx:%s PCI Abort: clearing.\n", host);
270 outl(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev));
271 pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT);
272 }
273
274 if (status_reg_value & TW_STATUS_QUEUE_ERROR) {
275 printk(KERN_WARNING "3w-xxxx:%s Controller Queue Error: clearing.\n", host);
276 outl(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
277 }
278
279 if (status_reg_value & TW_STATUS_SBUF_WRITE_ERROR) {
280 printk(KERN_WARNING "3w-xxxx:%s SBUF Write Error: clearing.\n", host);
281 outl(TW_CONTROL_CLEAR_SBUF_WRITE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
282 }
283
284 if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
285 if (tw_dev->reset_print == 0) {
286 printk(KERN_WARNING "3w-xxxx:%s Microcontroller Error: clearing.\n", host);
287 tw_dev->reset_print = 1;
288 }
289 return 1;
290 }
291
292 return 0;
293 } /* End tw_decode_bits() */
294
295 /* This function will poll the status register for a flag */
296 static int tw_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds)
297 {
298 u32 status_reg_value;
299 unsigned long before;
300 int retval = 1;
301
302 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
303 before = jiffies;
304
305 if (tw_check_bits(status_reg_value))
306 tw_decode_bits(tw_dev, status_reg_value, 0);
307
308 while ((status_reg_value & flag) != flag) {
309 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
310
311 if (tw_check_bits(status_reg_value))
312 tw_decode_bits(tw_dev, status_reg_value, 0);
313
314 if (time_after(jiffies, before + HZ * seconds))
315 goto out;
316
317 msleep(50);
318 }
319 retval = 0;
320 out:
321 return retval;
322 } /* End tw_poll_status() */
323
324 /* This function will poll the status register for disappearance of a flag */
325 static int tw_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds)
326 {
327 u32 status_reg_value;
328 unsigned long before;
329 int retval = 1;
330
331 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
332 before = jiffies;
333
334 if (tw_check_bits(status_reg_value))
335 tw_decode_bits(tw_dev, status_reg_value, 0);
336
337 while ((status_reg_value & flag) != 0) {
338 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
339
340 if (tw_check_bits(status_reg_value))
341 tw_decode_bits(tw_dev, status_reg_value, 0);
342
343 if (time_after(jiffies, before + HZ * seconds))
344 goto out;
345
346 msleep(50);
347 }
348 retval = 0;
349 out:
350 return retval;
351 } /* End tw_poll_status_gone() */
352
353 /* This function will attempt to post a command packet to the board */
354 static int tw_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
355 {
356 u32 status_reg_value;
357 unsigned long command_que_value;
358
359 dprintk(KERN_NOTICE "3w-xxxx: tw_post_command_packet()\n");
360 command_que_value = tw_dev->command_packet_physical_address[request_id];
361 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
362
363 if (tw_check_bits(status_reg_value)) {
364 dprintk(KERN_WARNING "3w-xxxx: tw_post_command_packet(): Unexpected bits.\n");
365 tw_decode_bits(tw_dev, status_reg_value, 1);
366 }
367
368 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
369 /* We successfully posted the command packet */
370 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
371 tw_dev->state[request_id] = TW_S_POSTED;
372 tw_dev->posted_request_count++;
373 if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) {
374 tw_dev->max_posted_request_count = tw_dev->posted_request_count;
375 }
376 } else {
377 /* Couldn't post the command packet, so we do it in the isr */
378 if (tw_dev->state[request_id] != TW_S_PENDING) {
379 tw_dev->state[request_id] = TW_S_PENDING;
380 tw_dev->pending_request_count++;
381 if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) {
382 tw_dev->max_pending_request_count = tw_dev->pending_request_count;
383 }
384 tw_dev->pending_queue[tw_dev->pending_tail] = request_id;
385 if (tw_dev->pending_tail == TW_Q_LENGTH-1) {
386 tw_dev->pending_tail = TW_Q_START;
387 } else {
388 tw_dev->pending_tail = tw_dev->pending_tail + 1;
389 }
390 }
391 TW_UNMASK_COMMAND_INTERRUPT(tw_dev);
392 return 1;
393 }
394 return 0;
395 } /* End tw_post_command_packet() */
396
397 /* This function will return valid sense buffer information for failed cmds */
398 static int tw_decode_sense(TW_Device_Extension *tw_dev, int request_id, int fill_sense)
399 {
400 int i;
401 TW_Command *command;
402
403 dprintk(KERN_WARNING "3w-xxxx: tw_decode_sense()\n");
404 command = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
405
406 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));
407
408 /* Attempt to return intelligent sense information */
409 if (fill_sense) {
410 if ((command->status == 0xc7) || (command->status == 0xcb)) {
411 for (i = 0; i < ARRAY_SIZE(tw_sense_table); i++) {
412 if (command->flags == tw_sense_table[i][0]) {
413
414 /* Valid bit and 'current errors' */
415 tw_dev->srb[request_id]->sense_buffer[0] = (0x1 << 7 | 0x70);
416
417 /* Sense key */
418 tw_dev->srb[request_id]->sense_buffer[2] = tw_sense_table[i][1];
419
420 /* Additional sense length */
421 tw_dev->srb[request_id]->sense_buffer[7] = 0xa; /* 10 bytes */
422
423 /* Additional sense code */
424 tw_dev->srb[request_id]->sense_buffer[12] = tw_sense_table[i][2];
425
426 /* Additional sense code qualifier */
427 tw_dev->srb[request_id]->sense_buffer[13] = tw_sense_table[i][3];
428
429 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
430 return TW_ISR_DONT_RESULT; /* Special case for isr to not over-write result */
431 }
432 }
433 }
434
435 /* If no table match, error so we get a reset */
436 return 1;
437 }
438
439 return 0;
440 } /* End tw_decode_sense() */
441
442 /* This function will report controller error status */
443 static int tw_check_errors(TW_Device_Extension *tw_dev)
444 {
445 u32 status_reg_value;
446
447 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
448
449 if (TW_STATUS_ERRORS(status_reg_value) || tw_check_bits(status_reg_value)) {
450 tw_decode_bits(tw_dev, status_reg_value, 0);
451 return 1;
452 }
453
454 return 0;
455 } /* End tw_check_errors() */
456
457 /* This function will empty the response que */
458 static void tw_empty_response_que(TW_Device_Extension *tw_dev)
459 {
460 u32 status_reg_value, response_que_value;
461
462 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
463
464 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
465 response_que_value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
466 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
467 }
468 } /* End tw_empty_response_que() */
469
470 /* This function will free a request_id */
471 static void tw_state_request_finish(TW_Device_Extension *tw_dev, int request_id)
472 {
473 tw_dev->free_queue[tw_dev->free_tail] = request_id;
474 tw_dev->state[request_id] = TW_S_FINISHED;
475 tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
476 } /* End tw_state_request_finish() */
477
478 /* This function will assign an available request_id */
479 static void tw_state_request_start(TW_Device_Extension *tw_dev, int *request_id)
480 {
481 *request_id = tw_dev->free_queue[tw_dev->free_head];
482 tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
483 tw_dev->state[*request_id] = TW_S_STARTED;
484 } /* End tw_state_request_start() */
485
486 /* Show some statistics about the card */
487 static ssize_t tw_show_stats(struct class_device *class_dev, char *buf)
488 {
489 struct Scsi_Host *host = class_to_shost(class_dev);
490 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
491 unsigned long flags = 0;
492 ssize_t len;
493
494 spin_lock_irqsave(tw_dev->host->host_lock, flags);
495 len = snprintf(buf, PAGE_SIZE, "3w-xxxx Driver version: %s\n"
496 "Current commands posted: %4d\n"
497 "Max commands posted: %4d\n"
498 "Current pending commands: %4d\n"
499 "Max pending commands: %4d\n"
500 "Last sgl length: %4d\n"
501 "Max sgl length: %4d\n"
502 "Last sector count: %4d\n"
503 "Max sector count: %4d\n"
504 "SCSI Host Resets: %4d\n"
505 "AEN's: %4d\n",
506 TW_DRIVER_VERSION,
507 tw_dev->posted_request_count,
508 tw_dev->max_posted_request_count,
509 tw_dev->pending_request_count,
510 tw_dev->max_pending_request_count,
511 tw_dev->sgl_entries,
512 tw_dev->max_sgl_entries,
513 tw_dev->sector_count,
514 tw_dev->max_sector_count,
515 tw_dev->num_resets,
516 tw_dev->aen_count);
517 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
518 return len;
519 } /* End tw_show_stats() */
520
521 /* This function will set a devices queue depth */
522 static int tw_change_queue_depth(struct scsi_device *sdev, int queue_depth)
523 {
524 if (queue_depth > TW_Q_LENGTH-2)
525 queue_depth = TW_Q_LENGTH-2;
526 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
527 return queue_depth;
528 } /* End tw_change_queue_depth() */
529
530 /* Create sysfs 'stats' entry */
531 static struct class_device_attribute tw_host_stats_attr = {
532 .attr = {
533 .name = "stats",
534 .mode = S_IRUGO,
535 },
536 .show = tw_show_stats
537 };
538
539 /* Host attributes initializer */
540 static struct class_device_attribute *tw_host_attrs[] = {
541 &tw_host_stats_attr,
542 NULL,
543 };
544
545 /* This function will read the aen queue from the isr */
546 static int tw_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
547 {
548 TW_Command *command_packet;
549 TW_Param *param;
550 unsigned long command_que_value;
551 u32 status_reg_value;
552 unsigned long param_value = 0;
553
554 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_read_queue()\n");
555
556 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
557 if (tw_check_bits(status_reg_value)) {
558 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Unexpected bits.\n");
559 tw_decode_bits(tw_dev, status_reg_value, 1);
560 return 1;
561 }
562 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
563 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet virtual address.\n");
564 return 1;
565 }
566 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
567 memset(command_packet, 0, sizeof(TW_Sector));
568 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
569 command_packet->size = 4;
570 command_packet->request_id = request_id;
571 command_packet->status = 0;
572 command_packet->flags = 0;
573 command_packet->byte6.parameter_count = 1;
574 command_que_value = tw_dev->command_packet_physical_address[request_id];
575 if (command_que_value == 0) {
576 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet physical address.\n");
577 return 1;
578 }
579 /* Now setup the param */
580 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
581 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment virtual address.\n");
582 return 1;
583 }
584 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
585 memset(param, 0, sizeof(TW_Sector));
586 param->table_id = 0x401; /* AEN table */
587 param->parameter_id = 2; /* Unit code */
588 param->parameter_size_bytes = 2;
589 param_value = tw_dev->alignment_physical_address[request_id];
590 if (param_value == 0) {
591 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment physical address.\n");
592 return 1;
593 }
594 command_packet->byte8.param.sgl[0].address = param_value;
595 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
596
597 /* Now post the command packet */
598 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
599 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post succeeded.\n");
600 tw_dev->srb[request_id] = NULL; /* Flag internal command */
601 tw_dev->state[request_id] = TW_S_POSTED;
602 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
603 } else {
604 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post failed, will retry.\n");
605 return 1;
606 }
607
608 return 0;
609 } /* End tw_aen_read_queue() */
610
611 /* This function will complete an aen request from the isr */
612 static int tw_aen_complete(TW_Device_Extension *tw_dev, int request_id)
613 {
614 TW_Param *param;
615 unsigned short aen;
616 int error = 0, table_max = 0;
617
618 dprintk(KERN_WARNING "3w-xxxx: tw_aen_complete()\n");
619 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
620 printk(KERN_WARNING "3w-xxxx: tw_aen_complete(): Bad alignment virtual address.\n");
621 return 1;
622 }
623 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
624 aen = *(unsigned short *)(param->data);
625 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_complete(): Queue'd code 0x%x\n", aen);
626
627 /* Print some useful info when certain aen codes come out */
628 if (aen == 0x0ff) {
629 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: INFO: AEN queue overflow.\n", tw_dev->host->host_no);
630 } else {
631 table_max = ARRAY_SIZE(tw_aen_string);
632 if ((aen & 0x0ff) < table_max) {
633 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
634 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s%d.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff], aen >> 8);
635 } else {
636 if (aen != 0x0)
637 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff]);
638 }
639 } else {
640 printk(KERN_WARNING "3w-xxxx: scsi%d: Received AEN %d.\n", tw_dev->host->host_no, aen);
641 }
642 }
643 if (aen != TW_AEN_QUEUE_EMPTY) {
644 tw_dev->aen_count++;
645
646 /* Now queue the code */
647 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
648 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
649 tw_dev->aen_tail = TW_Q_START;
650 } else {
651 tw_dev->aen_tail = tw_dev->aen_tail + 1;
652 }
653 if (tw_dev->aen_head == tw_dev->aen_tail) {
654 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
655 tw_dev->aen_head = TW_Q_START;
656 } else {
657 tw_dev->aen_head = tw_dev->aen_head + 1;
658 }
659 }
660
661 error = tw_aen_read_queue(tw_dev, request_id);
662 if (error) {
663 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing AEN.\n", tw_dev->host->host_no);
664 tw_dev->state[request_id] = TW_S_COMPLETED;
665 tw_state_request_finish(tw_dev, request_id);
666 }
667 } else {
668 tw_dev->state[request_id] = TW_S_COMPLETED;
669 tw_state_request_finish(tw_dev, request_id);
670 }
671
672 return 0;
673 } /* End tw_aen_complete() */
674
675 /* This function will drain the aen queue after a soft reset */
676 static int tw_aen_drain_queue(TW_Device_Extension *tw_dev)
677 {
678 TW_Command *command_packet;
679 TW_Param *param;
680 int request_id = 0;
681 unsigned long command_que_value;
682 unsigned long param_value;
683 TW_Response_Queue response_queue;
684 unsigned short aen;
685 unsigned short aen_code;
686 int finished = 0;
687 int first_reset = 0;
688 int queue = 0;
689 int found = 0, table_max = 0;
690
691 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_drain_queue()\n");
692
693 if (tw_poll_status(tw_dev, TW_STATUS_ATTENTION_INTERRUPT | TW_STATUS_MICROCONTROLLER_READY, 30)) {
694 dprintk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): No attention interrupt for card %d.\n", tw_device_extension_count);
695 return 1;
696 }
697 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
698
699 /* Empty response queue */
700 tw_empty_response_que(tw_dev);
701
702 /* Initialize command packet */
703 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
704 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet virtual address.\n");
705 return 1;
706 }
707 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
708 memset(command_packet, 0, sizeof(TW_Sector));
709 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
710 command_packet->size = 4;
711 command_packet->request_id = request_id;
712 command_packet->status = 0;
713 command_packet->flags = 0;
714 command_packet->byte6.parameter_count = 1;
715 command_que_value = tw_dev->command_packet_physical_address[request_id];
716 if (command_que_value == 0) {
717 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet physical address.\n");
718 return 1;
719 }
720
721 /* Now setup the param */
722 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
723 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment virtual address.\n");
724 return 1;
725 }
726 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
727 memset(param, 0, sizeof(TW_Sector));
728 param->table_id = 0x401; /* AEN table */
729 param->parameter_id = 2; /* Unit code */
730 param->parameter_size_bytes = 2;
731 param_value = tw_dev->alignment_physical_address[request_id];
732 if (param_value == 0) {
733 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment physical address.\n");
734 return 1;
735 }
736 command_packet->byte8.param.sgl[0].address = param_value;
737 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
738
739 /* Now drain the controller's aen queue */
740 do {
741 /* Post command packet */
742 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
743
744 /* Now poll for completion */
745 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
746 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
747 request_id = TW_RESID_OUT(response_queue.response_id);
748
749 if (request_id != 0) {
750 /* Unexpected request id */
751 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Unexpected request id.\n");
752 return 1;
753 }
754
755 if (command_packet->status != 0) {
756 if (command_packet->flags != TW_AEN_TABLE_UNDEFINED) {
757 /* Bad response */
758 tw_decode_sense(tw_dev, request_id, 0);
759 return 1;
760 } else {
761 /* We know this is a 3w-1x00, and doesn't support aen's */
762 return 0;
763 }
764 }
765
766 /* Now check the aen */
767 aen = *(unsigned short *)(param->data);
768 aen_code = (aen & 0x0ff);
769 queue = 0;
770 switch (aen_code) {
771 case TW_AEN_QUEUE_EMPTY:
772 dprintk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
773 if (first_reset != 1) {
774 return 1;
775 } else {
776 finished = 1;
777 }
778 break;
779 case TW_AEN_SOFT_RESET:
780 if (first_reset == 0) {
781 first_reset = 1;
782 } else {
783 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
784 tw_dev->aen_count++;
785 queue = 1;
786 }
787 break;
788 default:
789 if (aen == 0x0ff) {
790 printk(KERN_WARNING "3w-xxxx: AEN: INFO: AEN queue overflow.\n");
791 } else {
792 table_max = ARRAY_SIZE(tw_aen_string);
793 if ((aen & 0x0ff) < table_max) {
794 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
795 printk(KERN_WARNING "3w-xxxx: AEN: %s%d.\n", tw_aen_string[aen & 0xff], aen >> 8);
796 } else {
797 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
798 }
799 } else
800 printk(KERN_WARNING "3w-xxxx: Received AEN %d.\n", aen);
801 }
802 tw_dev->aen_count++;
803 queue = 1;
804 }
805
806 /* Now put the aen on the aen_queue */
807 if (queue == 1) {
808 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
809 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
810 tw_dev->aen_tail = TW_Q_START;
811 } else {
812 tw_dev->aen_tail = tw_dev->aen_tail + 1;
813 }
814 if (tw_dev->aen_head == tw_dev->aen_tail) {
815 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
816 tw_dev->aen_head = TW_Q_START;
817 } else {
818 tw_dev->aen_head = tw_dev->aen_head + 1;
819 }
820 }
821 }
822 found = 1;
823 }
824 if (found == 0) {
825 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Response never received.\n");
826 return 1;
827 }
828 } while (finished == 0);
829
830 return 0;
831 } /* End tw_aen_drain_queue() */
832
833 /* This function will allocate memory */
834 static int tw_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
835 {
836 int i;
837 dma_addr_t dma_handle;
838 unsigned long *cpu_addr = NULL;
839
840 dprintk(KERN_NOTICE "3w-xxxx: tw_allocate_memory()\n");
841
842 cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
843 if (cpu_addr == NULL) {
844 printk(KERN_WARNING "3w-xxxx: pci_alloc_consistent() failed.\n");
845 return 1;
846 }
847
848 if ((unsigned long)cpu_addr % (tw_dev->tw_pci_dev->device == TW_DEVICE_ID ? TW_ALIGNMENT_6000 : TW_ALIGNMENT_7000)) {
849 printk(KERN_WARNING "3w-xxxx: Couldn't allocate correctly aligned memory.\n");
850 pci_free_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, cpu_addr, dma_handle);
851 return 1;
852 }
853
854 memset(cpu_addr, 0, size*TW_Q_LENGTH);
855
856 for (i=0;i<TW_Q_LENGTH;i++) {
857 switch(which) {
858 case 0:
859 tw_dev->command_packet_physical_address[i] = dma_handle+(i*size);
860 tw_dev->command_packet_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
861 break;
862 case 1:
863 tw_dev->alignment_physical_address[i] = dma_handle+(i*size);
864 tw_dev->alignment_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
865 break;
866 default:
867 printk(KERN_WARNING "3w-xxxx: tw_allocate_memory(): case slip in tw_allocate_memory()\n");
868 return 1;
869 }
870 }
871
872 return 0;
873 } /* End tw_allocate_memory() */
874
875 /* This function handles ioctl for the character device */
876 static int tw_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
877 {
878 int request_id;
879 dma_addr_t dma_handle;
880 unsigned short tw_aen_code;
881 unsigned long flags;
882 unsigned int data_buffer_length = 0;
883 unsigned long data_buffer_length_adjusted = 0;
884 unsigned long *cpu_addr;
885 long timeout;
886 TW_New_Ioctl *tw_ioctl;
887 TW_Passthru *passthru;
888 TW_Device_Extension *tw_dev = tw_device_extension_list[iminor(inode)];
889 int retval = -EFAULT;
890 void __user *argp = (void __user *)arg;
891
892 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl()\n");
893
894 /* Only let one of these through at a time */
895 if (mutex_lock_interruptible(&tw_dev->ioctl_lock))
896 return -EINTR;
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 return retval;
1026 } /* End tw_chrdev_ioctl() */
1027
1028 /* This function handles open for the character device */
1029 static int tw_chrdev_open(struct inode *inode, struct file *file)
1030 {
1031 unsigned int minor_number;
1032
1033 dprintk(KERN_WARNING "3w-xxxx: tw_ioctl_open()\n");
1034
1035 minor_number = iminor(inode);
1036 if (minor_number >= tw_device_extension_count)
1037 return -ENODEV;
1038
1039 return 0;
1040 } /* End tw_chrdev_open() */
1041
1042 /* File operations struct for character device */
1043 static const struct file_operations tw_fops = {
1044 .owner = THIS_MODULE,
1045 .ioctl = tw_chrdev_ioctl,
1046 .open = tw_chrdev_open,
1047 .release = NULL
1048 };
1049
1050 /* This function will free up device extension resources */
1051 static void tw_free_device_extension(TW_Device_Extension *tw_dev)
1052 {
1053 dprintk(KERN_NOTICE "3w-xxxx: tw_free_device_extension()\n");
1054
1055 /* Free command packet and generic buffer memory */
1056 if (tw_dev->command_packet_virtual_address[0])
1057 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]);
1058
1059 if (tw_dev->alignment_virtual_address[0])
1060 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]);
1061 } /* End tw_free_device_extension() */
1062
1063 /* This function will send an initconnection command to controller */
1064 static int tw_initconnection(TW_Device_Extension *tw_dev, int message_credits)
1065 {
1066 unsigned long command_que_value;
1067 TW_Command *command_packet;
1068 TW_Response_Queue response_queue;
1069 int request_id = 0;
1070
1071 dprintk(KERN_NOTICE "3w-xxxx: tw_initconnection()\n");
1072
1073 /* Initialize InitConnection command packet */
1074 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1075 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet virtual address.\n");
1076 return 1;
1077 }
1078
1079 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1080 memset(command_packet, 0, sizeof(TW_Sector));
1081 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_INIT_CONNECTION);
1082 command_packet->size = TW_INIT_COMMAND_PACKET_SIZE;
1083 command_packet->request_id = request_id;
1084 command_packet->status = 0x0;
1085 command_packet->flags = 0x0;
1086 command_packet->byte6.message_credits = message_credits;
1087 command_packet->byte8.init_connection.response_queue_pointer = 0x0;
1088 command_que_value = tw_dev->command_packet_physical_address[request_id];
1089
1090 if (command_que_value == 0) {
1091 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet physical address.\n");
1092 return 1;
1093 }
1094
1095 /* Send command packet to the board */
1096 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1097
1098 /* Poll for completion */
1099 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1100 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1101 request_id = TW_RESID_OUT(response_queue.response_id);
1102
1103 if (request_id != 0) {
1104 /* unexpected request id */
1105 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Unexpected request id.\n");
1106 return 1;
1107 }
1108 if (command_packet->status != 0) {
1109 /* bad response */
1110 tw_decode_sense(tw_dev, request_id, 0);
1111 return 1;
1112 }
1113 }
1114 return 0;
1115 } /* End tw_initconnection() */
1116
1117 /* Set a value in the features table */
1118 static int tw_setfeature(TW_Device_Extension *tw_dev, int parm, int param_size,
1119 unsigned char *val)
1120 {
1121 TW_Param *param;
1122 TW_Command *command_packet;
1123 TW_Response_Queue response_queue;
1124 int request_id = 0;
1125 unsigned long command_que_value;
1126 unsigned long param_value;
1127
1128 /* Initialize SetParam command packet */
1129 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1130 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet virtual address.\n");
1131 return 1;
1132 }
1133 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1134 memset(command_packet, 0, sizeof(TW_Sector));
1135 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1136
1137 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
1138 param->table_id = 0x404; /* Features table */
1139 param->parameter_id = parm;
1140 param->parameter_size_bytes = param_size;
1141 memcpy(param->data, val, param_size);
1142
1143 param_value = tw_dev->alignment_physical_address[request_id];
1144 if (param_value == 0) {
1145 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad alignment physical address.\n");
1146 tw_dev->state[request_id] = TW_S_COMPLETED;
1147 tw_state_request_finish(tw_dev, request_id);
1148 tw_dev->srb[request_id]->result = (DID_OK << 16);
1149 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1150 }
1151 command_packet->byte8.param.sgl[0].address = param_value;
1152 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1153
1154 command_packet->size = 4;
1155 command_packet->request_id = request_id;
1156 command_packet->byte6.parameter_count = 1;
1157
1158 command_que_value = tw_dev->command_packet_physical_address[request_id];
1159 if (command_que_value == 0) {
1160 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet physical address.\n");
1161 return 1;
1162 }
1163
1164 /* Send command packet to the board */
1165 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1166
1167 /* Poll for completion */
1168 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1169 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1170 request_id = TW_RESID_OUT(response_queue.response_id);
1171
1172 if (request_id != 0) {
1173 /* unexpected request id */
1174 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Unexpected request id.\n");
1175 return 1;
1176 }
1177 if (command_packet->status != 0) {
1178 /* bad response */
1179 tw_decode_sense(tw_dev, request_id, 0);
1180 return 1;
1181 }
1182 }
1183
1184 return 0;
1185 } /* End tw_setfeature() */
1186
1187 /* This function will reset a controller */
1188 static int tw_reset_sequence(TW_Device_Extension *tw_dev)
1189 {
1190 int error = 0;
1191 int tries = 0;
1192 unsigned char c = 1;
1193
1194 /* Reset the board */
1195 while (tries < TW_MAX_RESET_TRIES) {
1196 TW_SOFT_RESET(tw_dev);
1197
1198 error = tw_aen_drain_queue(tw_dev);
1199 if (error) {
1200 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN drain failed, retrying.\n", tw_dev->host->host_no);
1201 tries++;
1202 continue;
1203 }
1204
1205 /* Check for controller errors */
1206 if (tw_check_errors(tw_dev)) {
1207 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors found, retrying.\n", tw_dev->host->host_no);
1208 tries++;
1209 continue;
1210 }
1211
1212 /* Now the controller is in a good state */
1213 break;
1214 }
1215
1216 if (tries >= TW_MAX_RESET_TRIES) {
1217 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors, card not responding, check all cabling.\n", tw_dev->host->host_no);
1218 return 1;
1219 }
1220
1221 error = tw_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS);
1222 if (error) {
1223 printk(KERN_WARNING "3w-xxxx: scsi%d: Connection initialization failed.\n", tw_dev->host->host_no);
1224 return 1;
1225 }
1226
1227 error = tw_setfeature(tw_dev, 2, 1, &c);
1228 if (error) {
1229 printk(KERN_WARNING "3w-xxxx: Unable to set features for card, probable old firmware or card.\n");
1230 }
1231
1232 return 0;
1233 } /* End tw_reset_sequence() */
1234
1235 /* This function will initialize the fields of a device extension */
1236 static int tw_initialize_device_extension(TW_Device_Extension *tw_dev)
1237 {
1238 int i, error=0;
1239
1240 dprintk(KERN_NOTICE "3w-xxxx: tw_initialize_device_extension()\n");
1241
1242 /* Initialize command packet buffers */
1243 error = tw_allocate_memory(tw_dev, sizeof(TW_Command), 0);
1244 if (error) {
1245 printk(KERN_WARNING "3w-xxxx: Command packet memory allocation failed.\n");
1246 return 1;
1247 }
1248
1249 /* Initialize generic buffer */
1250 error = tw_allocate_memory(tw_dev, sizeof(TW_Sector), 1);
1251 if (error) {
1252 printk(KERN_WARNING "3w-xxxx: Generic memory allocation failed.\n");
1253 return 1;
1254 }
1255
1256 for (i=0;i<TW_Q_LENGTH;i++) {
1257 tw_dev->free_queue[i] = i;
1258 tw_dev->state[i] = TW_S_INITIAL;
1259 }
1260
1261 tw_dev->pending_head = TW_Q_START;
1262 tw_dev->pending_tail = TW_Q_START;
1263 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1264
1265 mutex_init(&tw_dev->ioctl_lock);
1266 init_waitqueue_head(&tw_dev->ioctl_wqueue);
1267
1268 return 0;
1269 } /* End tw_initialize_device_extension() */
1270
1271 static int tw_map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
1272 {
1273 int use_sg;
1274
1275 dprintk(KERN_WARNING "3w-xxxx: tw_map_scsi_sg_data()\n");
1276
1277 if (cmd->use_sg == 0)
1278 return 0;
1279
1280 use_sg = pci_map_sg(pdev, cmd->request_buffer, cmd->use_sg, DMA_BIDIRECTIONAL);
1281
1282 if (use_sg == 0) {
1283 printk(KERN_WARNING "3w-xxxx: tw_map_scsi_sg_data(): pci_map_sg() failed.\n");
1284 return 0;
1285 }
1286
1287 cmd->SCp.phase = TW_PHASE_SGLIST;
1288 cmd->SCp.have_data_in = use_sg;
1289
1290 return use_sg;
1291 } /* End tw_map_scsi_sg_data() */
1292
1293 static u32 tw_map_scsi_single_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
1294 {
1295 dma_addr_t mapping;
1296
1297 dprintk(KERN_WARNING "3w-xxxx: tw_map_scsi_single_data()\n");
1298
1299 if (cmd->request_bufflen == 0)
1300 return 0;
1301
1302 mapping = pci_map_page(pdev, virt_to_page(cmd->request_buffer), offset_in_page(cmd->request_buffer), cmd->request_bufflen, DMA_BIDIRECTIONAL);
1303
1304 if (mapping == 0) {
1305 printk(KERN_WARNING "3w-xxxx: tw_map_scsi_single_data(): pci_map_page() failed.\n");
1306 return 0;
1307 }
1308
1309 cmd->SCp.phase = TW_PHASE_SINGLE;
1310 cmd->SCp.have_data_in = mapping;
1311
1312 return mapping;
1313 } /* End tw_map_scsi_single_data() */
1314
1315 static void tw_unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
1316 {
1317 dprintk(KERN_WARNING "3w-xxxx: tw_unmap_scsi_data()\n");
1318
1319 switch(cmd->SCp.phase) {
1320 case TW_PHASE_SINGLE:
1321 pci_unmap_page(pdev, cmd->SCp.have_data_in, cmd->request_bufflen, DMA_BIDIRECTIONAL);
1322 break;
1323 case TW_PHASE_SGLIST:
1324 pci_unmap_sg(pdev, cmd->request_buffer, cmd->use_sg, DMA_BIDIRECTIONAL);
1325 break;
1326 }
1327 } /* End tw_unmap_scsi_data() */
1328
1329 /* This function will reset a device extension */
1330 static int tw_reset_device_extension(TW_Device_Extension *tw_dev)
1331 {
1332 int i = 0;
1333 struct scsi_cmnd *srb;
1334 unsigned long flags = 0;
1335
1336 dprintk(KERN_NOTICE "3w-xxxx: tw_reset_device_extension()\n");
1337
1338 set_bit(TW_IN_RESET, &tw_dev->flags);
1339 TW_DISABLE_INTERRUPTS(tw_dev);
1340 TW_MASK_COMMAND_INTERRUPT(tw_dev);
1341 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1342
1343 /* Abort all requests that are in progress */
1344 for (i=0;i<TW_Q_LENGTH;i++) {
1345 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1346 (tw_dev->state[i] != TW_S_INITIAL) &&
1347 (tw_dev->state[i] != TW_S_COMPLETED)) {
1348 srb = tw_dev->srb[i];
1349 if (srb != NULL) {
1350 srb->result = (DID_RESET << 16);
1351 tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);
1352 tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[i]);
1353 }
1354 }
1355 }
1356
1357 /* Reset queues and counts */
1358 for (i=0;i<TW_Q_LENGTH;i++) {
1359 tw_dev->free_queue[i] = i;
1360 tw_dev->state[i] = TW_S_INITIAL;
1361 }
1362 tw_dev->free_head = TW_Q_START;
1363 tw_dev->free_tail = TW_Q_START;
1364 tw_dev->posted_request_count = 0;
1365 tw_dev->pending_request_count = 0;
1366 tw_dev->pending_head = TW_Q_START;
1367 tw_dev->pending_tail = TW_Q_START;
1368 tw_dev->reset_print = 0;
1369
1370 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1371
1372 if (tw_reset_sequence(tw_dev)) {
1373 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset sequence failed.\n", tw_dev->host->host_no);
1374 return 1;
1375 }
1376
1377 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
1378 clear_bit(TW_IN_RESET, &tw_dev->flags);
1379 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1380
1381 return 0;
1382 } /* End tw_reset_device_extension() */
1383
1384 /* This funciton returns unit geometry in cylinders/heads/sectors */
1385 static int tw_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev,
1386 sector_t capacity, int geom[])
1387 {
1388 int heads, sectors, cylinders;
1389 TW_Device_Extension *tw_dev;
1390
1391 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam()\n");
1392 tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
1393
1394 heads = 64;
1395 sectors = 32;
1396 cylinders = sector_div(capacity, heads * sectors);
1397
1398 if (capacity >= 0x200000) {
1399 heads = 255;
1400 sectors = 63;
1401 cylinders = sector_div(capacity, heads * sectors);
1402 }
1403
1404 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam(): heads = %d, sectors = %d, cylinders = %d\n", heads, sectors, cylinders);
1405 geom[0] = heads;
1406 geom[1] = sectors;
1407 geom[2] = cylinders;
1408
1409 return 0;
1410 } /* End tw_scsi_biosparam() */
1411
1412 /* This is the new scsi eh reset function */
1413 static int tw_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1414 {
1415 TW_Device_Extension *tw_dev=NULL;
1416 int retval = FAILED;
1417
1418 tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1419
1420 tw_dev->num_resets++;
1421
1422 sdev_printk(KERN_WARNING, SCpnt->device,
1423 "WARNING: Command (0x%x) timed out, resetting card.\n",
1424 SCpnt->cmnd[0]);
1425
1426 /* Make sure we are not issuing an ioctl or resetting from ioctl */
1427 mutex_lock(&tw_dev->ioctl_lock);
1428
1429 /* Now reset the card and some of the device extension data */
1430 if (tw_reset_device_extension(tw_dev)) {
1431 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset failed.\n", tw_dev->host->host_no);
1432 goto out;
1433 }
1434
1435 retval = SUCCESS;
1436 out:
1437 mutex_unlock(&tw_dev->ioctl_lock);
1438 return retval;
1439 } /* End tw_scsi_eh_reset() */
1440
1441 /* This function handles scsi inquiry commands */
1442 static int tw_scsiop_inquiry(TW_Device_Extension *tw_dev, int request_id)
1443 {
1444 TW_Param *param;
1445 TW_Command *command_packet;
1446 unsigned long command_que_value;
1447 unsigned long param_value;
1448
1449 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry()\n");
1450
1451 /* Initialize command packet */
1452 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1453 if (command_packet == NULL) {
1454 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet virtual address.\n");
1455 return 1;
1456 }
1457 memset(command_packet, 0, sizeof(TW_Sector));
1458 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1459 command_packet->size = 4;
1460 command_packet->request_id = request_id;
1461 command_packet->status = 0;
1462 command_packet->flags = 0;
1463 command_packet->byte6.parameter_count = 1;
1464
1465 /* Now setup the param */
1466 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1467 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment virtual address.\n");
1468 return 1;
1469 }
1470 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1471 memset(param, 0, sizeof(TW_Sector));
1472 param->table_id = 3; /* unit summary table */
1473 param->parameter_id = 3; /* unitsstatus parameter */
1474 param->parameter_size_bytes = TW_MAX_UNITS;
1475 param_value = tw_dev->alignment_physical_address[request_id];
1476 if (param_value == 0) {
1477 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment physical address.\n");
1478 return 1;
1479 }
1480
1481 command_packet->byte8.param.sgl[0].address = param_value;
1482 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1483 command_que_value = tw_dev->command_packet_physical_address[request_id];
1484 if (command_que_value == 0) {
1485 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet physical address.\n");
1486 return 1;
1487 }
1488
1489 /* Now try to post the command packet */
1490 tw_post_command_packet(tw_dev, request_id);
1491
1492 return 0;
1493 } /* End tw_scsiop_inquiry() */
1494
1495 static void tw_transfer_internal(TW_Device_Extension *tw_dev, int request_id,
1496 void *data, unsigned int len)
1497 {
1498 struct scsi_cmnd *cmd = tw_dev->srb[request_id];
1499 void *buf;
1500 unsigned int transfer_len;
1501 unsigned long flags = 0;
1502
1503 if (cmd->use_sg) {
1504 struct scatterlist *sg =
1505 (struct scatterlist *)cmd->request_buffer;
1506 local_irq_save(flags);
1507 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
1508 transfer_len = min(sg->length, len);
1509 } else {
1510 buf = cmd->request_buffer;
1511 transfer_len = min(cmd->request_bufflen, len);
1512 }
1513
1514 memcpy(buf, data, transfer_len);
1515
1516 if (cmd->use_sg) {
1517 struct scatterlist *sg;
1518
1519 sg = (struct scatterlist *)cmd->request_buffer;
1520 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1521 local_irq_restore(flags);
1522 }
1523 }
1524
1525 /* This function is called by the isr to complete an inquiry command */
1526 static int tw_scsiop_inquiry_complete(TW_Device_Extension *tw_dev, int request_id)
1527 {
1528 unsigned char *is_unit_present;
1529 unsigned char request_buffer[36];
1530 TW_Param *param;
1531
1532 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry_complete()\n");
1533
1534 memset(request_buffer, 0, sizeof(request_buffer));
1535 request_buffer[0] = TYPE_DISK; /* Peripheral device type */
1536 request_buffer[1] = 0; /* Device type modifier */
1537 request_buffer[2] = 0; /* No ansi/iso compliance */
1538 request_buffer[4] = 31; /* Additional length */
1539 memcpy(&request_buffer[8], "3ware ", 8); /* Vendor ID */
1540 sprintf(&request_buffer[16], "Logical Disk %-2d ", tw_dev->srb[request_id]->device->id);
1541 memcpy(&request_buffer[32], TW_DRIVER_VERSION, 3);
1542 tw_transfer_internal(tw_dev, request_id, request_buffer,
1543 sizeof(request_buffer));
1544
1545 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1546 if (param == NULL) {
1547 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry_complete(): Bad alignment virtual address.\n");
1548 return 1;
1549 }
1550 is_unit_present = &(param->data[0]);
1551
1552 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1553 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1554 } else {
1555 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1556 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1557 return TW_ISR_DONT_RESULT;
1558 }
1559
1560 return 0;
1561 } /* End tw_scsiop_inquiry_complete() */
1562
1563 /* This function handles scsi mode_sense commands */
1564 static int tw_scsiop_mode_sense(TW_Device_Extension *tw_dev, int request_id)
1565 {
1566 TW_Param *param;
1567 TW_Command *command_packet;
1568 unsigned long command_que_value;
1569 unsigned long param_value;
1570
1571 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense()\n");
1572
1573 /* Only page control = 0, page code = 0x8 (cache page) supported */
1574 if (tw_dev->srb[request_id]->cmnd[2] != 0x8) {
1575 tw_dev->state[request_id] = TW_S_COMPLETED;
1576 tw_state_request_finish(tw_dev, request_id);
1577 tw_dev->srb[request_id]->result = (DID_OK << 16);
1578 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1579 return 0;
1580 }
1581
1582 /* Now read firmware cache setting for this unit */
1583 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1584 if (command_packet == NULL) {
1585 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet virtual address.\n");
1586 return 1;
1587 }
1588
1589 /* Setup the command packet */
1590 memset(command_packet, 0, sizeof(TW_Sector));
1591 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1592 command_packet->size = 4;
1593 command_packet->request_id = request_id;
1594 command_packet->status = 0;
1595 command_packet->flags = 0;
1596 command_packet->byte6.parameter_count = 1;
1597
1598 /* Setup the param */
1599 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1600 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment virtual address.\n");
1601 return 1;
1602 }
1603
1604 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1605 memset(param, 0, sizeof(TW_Sector));
1606 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE + tw_dev->srb[request_id]->device->id;
1607 param->parameter_id = 7; /* unit flags */
1608 param->parameter_size_bytes = 1;
1609 param_value = tw_dev->alignment_physical_address[request_id];
1610 if (param_value == 0) {
1611 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment physical address.\n");
1612 return 1;
1613 }
1614
1615 command_packet->byte8.param.sgl[0].address = param_value;
1616 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1617 command_que_value = tw_dev->command_packet_physical_address[request_id];
1618 if (command_que_value == 0) {
1619 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet physical address.\n");
1620 return 1;
1621 }
1622
1623 /* Now try to post the command packet */
1624 tw_post_command_packet(tw_dev, request_id);
1625
1626 return 0;
1627 } /* End tw_scsiop_mode_sense() */
1628
1629 /* This function is called by the isr to complete a mode sense command */
1630 static int tw_scsiop_mode_sense_complete(TW_Device_Extension *tw_dev, int request_id)
1631 {
1632 TW_Param *param;
1633 unsigned char *flags;
1634 unsigned char request_buffer[8];
1635
1636 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense_complete()\n");
1637
1638 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1639 if (param == NULL) {
1640 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense_complete(): Bad alignment virtual address.\n");
1641 return 1;
1642 }
1643 flags = (char *)&(param->data[0]);
1644 memset(request_buffer, 0, sizeof(request_buffer));
1645
1646 request_buffer[0] = 0xf; /* mode data length */
1647 request_buffer[1] = 0; /* default medium type */
1648 request_buffer[2] = 0x10; /* dpo/fua support on */
1649 request_buffer[3] = 0; /* no block descriptors */
1650 request_buffer[4] = 0x8; /* caching page */
1651 request_buffer[5] = 0xa; /* page length */
1652 if (*flags & 0x1)
1653 request_buffer[6] = 0x5; /* WCE on, RCD on */
1654 else
1655 request_buffer[6] = 0x1; /* WCE off, RCD on */
1656 tw_transfer_internal(tw_dev, request_id, request_buffer,
1657 sizeof(request_buffer));
1658
1659 return 0;
1660 } /* End tw_scsiop_mode_sense_complete() */
1661
1662 /* This function handles scsi read_capacity commands */
1663 static int tw_scsiop_read_capacity(TW_Device_Extension *tw_dev, int request_id)
1664 {
1665 TW_Param *param;
1666 TW_Command *command_packet;
1667 unsigned long command_que_value;
1668 unsigned long param_value;
1669
1670 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity()\n");
1671
1672 /* Initialize command packet */
1673 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1674
1675 if (command_packet == NULL) {
1676 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet virtual address.\n");
1677 return 1;
1678 }
1679 memset(command_packet, 0, sizeof(TW_Sector));
1680 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1681 command_packet->size = 4;
1682 command_packet->request_id = request_id;
1683 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1684 command_packet->status = 0;
1685 command_packet->flags = 0;
1686 command_packet->byte6.block_count = 1;
1687
1688 /* Now setup the param */
1689 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1690 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment virtual address.\n");
1691 return 1;
1692 }
1693 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1694 memset(param, 0, sizeof(TW_Sector));
1695 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE +
1696 tw_dev->srb[request_id]->device->id;
1697 param->parameter_id = 4; /* unitcapacity parameter */
1698 param->parameter_size_bytes = 4;
1699 param_value = tw_dev->alignment_physical_address[request_id];
1700 if (param_value == 0) {
1701 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment physical address.\n");
1702 return 1;
1703 }
1704
1705 command_packet->byte8.param.sgl[0].address = param_value;
1706 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1707 command_que_value = tw_dev->command_packet_physical_address[request_id];
1708 if (command_que_value == 0) {
1709 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet physical address.\n");
1710 return 1;
1711 }
1712
1713 /* Now try to post the command to the board */
1714 tw_post_command_packet(tw_dev, request_id);
1715
1716 return 0;
1717 } /* End tw_scsiop_read_capacity() */
1718
1719 /* This function is called by the isr to complete a readcapacity command */
1720 static int tw_scsiop_read_capacity_complete(TW_Device_Extension *tw_dev, int request_id)
1721 {
1722 unsigned char *param_data;
1723 u32 capacity;
1724 char buff[8];
1725 TW_Param *param;
1726
1727 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete()\n");
1728
1729 memset(buff, 0, sizeof(buff));
1730 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1731 if (param == NULL) {
1732 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_capacity_complete(): Bad alignment virtual address.\n");
1733 return 1;
1734 }
1735 param_data = &(param->data[0]);
1736
1737 capacity = (param_data[3] << 24) | (param_data[2] << 16) |
1738 (param_data[1] << 8) | param_data[0];
1739
1740 /* Subtract one sector to fix get last sector ioctl */
1741 capacity -= 1;
1742
1743 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete(): Capacity = 0x%x.\n", capacity);
1744
1745 /* Number of LBA's */
1746 buff[0] = (capacity >> 24);
1747 buff[1] = (capacity >> 16) & 0xff;
1748 buff[2] = (capacity >> 8) & 0xff;
1749 buff[3] = capacity & 0xff;
1750
1751 /* Block size in bytes (512) */
1752 buff[4] = (TW_BLOCK_SIZE >> 24);
1753 buff[5] = (TW_BLOCK_SIZE >> 16) & 0xff;
1754 buff[6] = (TW_BLOCK_SIZE >> 8) & 0xff;
1755 buff[7] = TW_BLOCK_SIZE & 0xff;
1756
1757 tw_transfer_internal(tw_dev, request_id, buff, sizeof(buff));
1758
1759 return 0;
1760 } /* End tw_scsiop_read_capacity_complete() */
1761
1762 /* This function handles scsi read or write commands */
1763 static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id)
1764 {
1765 TW_Command *command_packet;
1766 unsigned long command_que_value;
1767 u32 lba = 0x0, num_sectors = 0x0, buffaddr = 0x0;
1768 int i, use_sg;
1769 struct scsi_cmnd *srb;
1770 struct scatterlist *sglist;
1771
1772 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write()\n");
1773
1774 if (tw_dev->srb[request_id]->request_buffer == NULL) {
1775 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Request buffer NULL.\n");
1776 return 1;
1777 }
1778 sglist = (struct scatterlist *)tw_dev->srb[request_id]->request_buffer;
1779 srb = tw_dev->srb[request_id];
1780
1781 /* Initialize command packet */
1782 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1783 if (command_packet == NULL) {
1784 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): Bad command packet virtual address.\n");
1785 return 1;
1786 }
1787
1788 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == READ_10) {
1789 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_READ);
1790 } else {
1791 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_WRITE);
1792 }
1793
1794 command_packet->size = 3;
1795 command_packet->request_id = request_id;
1796 command_packet->unit__hostid = TW_UNITHOST_IN(0, srb->device->id);
1797 command_packet->status = 0;
1798 command_packet->flags = 0;
1799
1800 if (srb->cmnd[0] == WRITE_10) {
1801 if ((srb->cmnd[1] & 0x8) || (srb->cmnd[1] & 0x10))
1802 command_packet->flags = 1;
1803 }
1804
1805 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6) {
1806 lba = ((u32)srb->cmnd[1] << 16) | ((u32)srb->cmnd[2] << 8) | (u32)srb->cmnd[3];
1807 num_sectors = (u32)srb->cmnd[4];
1808 } else {
1809 lba = ((u32)srb->cmnd[2] << 24) | ((u32)srb->cmnd[3] << 16) | ((u32)srb->cmnd[4] << 8) | (u32)srb->cmnd[5];
1810 num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
1811 }
1812
1813 /* Update sector statistic */
1814 tw_dev->sector_count = num_sectors;
1815 if (tw_dev->sector_count > tw_dev->max_sector_count)
1816 tw_dev->max_sector_count = tw_dev->sector_count;
1817
1818 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): lba = 0x%x num_sectors = 0x%x\n", lba, num_sectors);
1819 command_packet->byte8.io.lba = lba;
1820 command_packet->byte6.block_count = num_sectors;
1821
1822 /* Do this if there are no sg list entries */
1823 if (tw_dev->srb[request_id]->use_sg == 0) {
1824 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): SG = 0\n");
1825 buffaddr = tw_map_scsi_single_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
1826 if (buffaddr == 0)
1827 return 1;
1828
1829 command_packet->byte8.io.sgl[0].address = buffaddr;
1830 command_packet->byte8.io.sgl[0].length = tw_dev->srb[request_id]->request_bufflen;
1831 command_packet->size+=2;
1832 }
1833
1834 /* Do this if we have multiple sg list entries */
1835 if (tw_dev->srb[request_id]->use_sg > 0) {
1836 use_sg = tw_map_scsi_sg_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
1837 if (use_sg == 0)
1838 return 1;
1839
1840 for (i=0;i<use_sg; i++) {
1841 command_packet->byte8.io.sgl[i].address = sg_dma_address(&sglist[i]);
1842 command_packet->byte8.io.sgl[i].length = sg_dma_len(&sglist[i]);
1843 command_packet->size+=2;
1844 }
1845 }
1846
1847 /* Update SG statistics */
1848 tw_dev->sgl_entries = tw_dev->srb[request_id]->use_sg;
1849 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
1850 tw_dev->max_sgl_entries = tw_dev->sgl_entries;
1851
1852 command_que_value = tw_dev->command_packet_physical_address[request_id];
1853 if (command_que_value == 0) {
1854 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Bad command packet physical address.\n");
1855 return 1;
1856 }
1857
1858 /* Now try to post the command to the board */
1859 tw_post_command_packet(tw_dev, request_id);
1860
1861 return 0;
1862 } /* End tw_scsiop_read_write() */
1863
1864 /* This function will handle the request sense scsi command */
1865 static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id)
1866 {
1867 char request_buffer[18];
1868
1869 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n");
1870
1871 memset(request_buffer, 0, sizeof(request_buffer));
1872 request_buffer[0] = 0x70; /* Immediate fixed format */
1873 request_buffer[7] = 10; /* minimum size per SPC: 18 bytes */
1874 /* leave all other fields zero, giving effectively NO_SENSE return */
1875 tw_transfer_internal(tw_dev, request_id, request_buffer,
1876 sizeof(request_buffer));
1877
1878 tw_dev->state[request_id] = TW_S_COMPLETED;
1879 tw_state_request_finish(tw_dev, request_id);
1880
1881 /* If we got a request_sense, we probably want a reset, return error */
1882 tw_dev->srb[request_id]->result = (DID_ERROR << 16);
1883 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1884
1885 return 0;
1886 } /* End tw_scsiop_request_sense() */
1887
1888 /* This function will handle synchronize cache scsi command */
1889 static int tw_scsiop_synchronize_cache(TW_Device_Extension *tw_dev, int request_id)
1890 {
1891 TW_Command *command_packet;
1892 unsigned long command_que_value;
1893
1894 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_synchronize_cache()\n");
1895
1896 /* Send firmware flush command for this unit */
1897 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1898 if (command_packet == NULL) {
1899 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet virtual address.\n");
1900 return 1;
1901 }
1902
1903 /* Setup the command packet */
1904 memset(command_packet, 0, sizeof(TW_Sector));
1905 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_FLUSH_CACHE);
1906 command_packet->size = 2;
1907 command_packet->request_id = request_id;
1908 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1909 command_packet->status = 0;
1910 command_packet->flags = 0;
1911 command_packet->byte6.parameter_count = 1;
1912 command_que_value = tw_dev->command_packet_physical_address[request_id];
1913 if (command_que_value == 0) {
1914 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet physical address.\n");
1915 return 1;
1916 }
1917
1918 /* Now try to post the command packet */
1919 tw_post_command_packet(tw_dev, request_id);
1920
1921 return 0;
1922 } /* End tw_scsiop_synchronize_cache() */
1923
1924 /* This function will handle test unit ready scsi command */
1925 static int tw_scsiop_test_unit_ready(TW_Device_Extension *tw_dev, int request_id)
1926 {
1927 TW_Param *param;
1928 TW_Command *command_packet;
1929 unsigned long command_que_value;
1930 unsigned long param_value;
1931
1932 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_test_unit_ready()\n");
1933
1934 /* Initialize command packet */
1935 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1936 if (command_packet == NULL) {
1937 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet virtual address.\n");
1938 return 1;
1939 }
1940 memset(command_packet, 0, sizeof(TW_Sector));
1941 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1942 command_packet->size = 4;
1943 command_packet->request_id = request_id;
1944 command_packet->status = 0;
1945 command_packet->flags = 0;
1946 command_packet->byte6.parameter_count = 1;
1947
1948 /* Now setup the param */
1949 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1950 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment virtual address.\n");
1951 return 1;
1952 }
1953 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1954 memset(param, 0, sizeof(TW_Sector));
1955 param->table_id = 3; /* unit summary table */
1956 param->parameter_id = 3; /* unitsstatus parameter */
1957 param->parameter_size_bytes = TW_MAX_UNITS;
1958 param_value = tw_dev->alignment_physical_address[request_id];
1959 if (param_value == 0) {
1960 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment physical address.\n");
1961 return 1;
1962 }
1963
1964 command_packet->byte8.param.sgl[0].address = param_value;
1965 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1966 command_que_value = tw_dev->command_packet_physical_address[request_id];
1967 if (command_que_value == 0) {
1968 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet physical address.\n");
1969 return 1;
1970 }
1971
1972 /* Now try to post the command packet */
1973 tw_post_command_packet(tw_dev, request_id);
1974
1975 return 0;
1976 } /* End tw_scsiop_test_unit_ready() */
1977
1978 /* This function is called by the isr to complete a testunitready command */
1979 static int tw_scsiop_test_unit_ready_complete(TW_Device_Extension *tw_dev, int request_id)
1980 {
1981 unsigned char *is_unit_present;
1982 TW_Param *param;
1983
1984 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete()\n");
1985
1986 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1987 if (param == NULL) {
1988 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete(): Bad alignment virtual address.\n");
1989 return 1;
1990 }
1991 is_unit_present = &(param->data[0]);
1992
1993 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1994 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1995 } else {
1996 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1997 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1998 return TW_ISR_DONT_RESULT;
1999 }
2000
2001 return 0;
2002 } /* End tw_scsiop_test_unit_ready_complete() */
2003
2004 /* This is the main scsi queue function to handle scsi opcodes */
2005 static int tw_scsi_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
2006 {
2007 unsigned char *command = SCpnt->cmnd;
2008 int request_id = 0;
2009 int retval = 1;
2010 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
2011
2012 /* If we are resetting due to timed out ioctl, report as busy */
2013 if (test_bit(TW_IN_RESET, &tw_dev->flags))
2014 return SCSI_MLQUEUE_HOST_BUSY;
2015
2016 /* Save done function into Scsi_Cmnd struct */
2017 SCpnt->scsi_done = done;
2018
2019 /* Queue the command and get a request id */
2020 tw_state_request_start(tw_dev, &request_id);
2021
2022 /* Save the scsi command for use by the ISR */
2023 tw_dev->srb[request_id] = SCpnt;
2024
2025 /* Initialize phase to zero */
2026 SCpnt->SCp.phase = TW_PHASE_INITIAL;
2027
2028 switch (*command) {
2029 case READ_10:
2030 case READ_6:
2031 case WRITE_10:
2032 case WRITE_6:
2033 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ/WRITE.\n");
2034 retval = tw_scsiop_read_write(tw_dev, request_id);
2035 break;
2036 case TEST_UNIT_READY:
2037 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught TEST_UNIT_READY.\n");
2038 retval = tw_scsiop_test_unit_ready(tw_dev, request_id);
2039 break;
2040 case INQUIRY:
2041 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught INQUIRY.\n");
2042 retval = tw_scsiop_inquiry(tw_dev, request_id);
2043 break;
2044 case READ_CAPACITY:
2045 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ_CAPACITY.\n");
2046 retval = tw_scsiop_read_capacity(tw_dev, request_id);
2047 break;
2048 case REQUEST_SENSE:
2049 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught REQUEST_SENSE.\n");
2050 retval = tw_scsiop_request_sense(tw_dev, request_id);
2051 break;
2052 case MODE_SENSE:
2053 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught MODE_SENSE.\n");
2054 retval = tw_scsiop_mode_sense(tw_dev, request_id);
2055 break;
2056 case SYNCHRONIZE_CACHE:
2057 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught SYNCHRONIZE_CACHE.\n");
2058 retval = tw_scsiop_synchronize_cache(tw_dev, request_id);
2059 break;
2060 case TW_IOCTL:
2061 printk(KERN_WARNING "3w-xxxx: SCSI_IOCTL_SEND_COMMAND deprecated, please update your 3ware tools.\n");
2062 break;
2063 default:
2064 printk(KERN_NOTICE "3w-xxxx: scsi%d: Unknown scsi opcode: 0x%x\n", tw_dev->host->host_no, *command);
2065 tw_dev->state[request_id] = TW_S_COMPLETED;
2066 tw_state_request_finish(tw_dev, request_id);
2067 SCpnt->result = (DID_BAD_TARGET << 16);
2068 done(SCpnt);
2069 retval = 0;
2070 }
2071 if (retval) {
2072 tw_dev->state[request_id] = TW_S_COMPLETED;
2073 tw_state_request_finish(tw_dev, request_id);
2074 SCpnt->result = (DID_ERROR << 16);
2075 done(SCpnt);
2076 retval = 0;
2077 }
2078 return retval;
2079 } /* End tw_scsi_queue() */
2080
2081 /* This function is the interrupt service routine */
2082 static irqreturn_t tw_interrupt(int irq, void *dev_instance)
2083 {
2084 int request_id;
2085 u32 status_reg_value;
2086 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
2087 TW_Response_Queue response_que;
2088 int error = 0, retval = 0;
2089 TW_Command *command_packet;
2090 int handled = 0;
2091
2092 /* Get the host lock for io completions */
2093 spin_lock(tw_dev->host->host_lock);
2094
2095 /* Read the registers */
2096 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2097
2098 /* Check if this is our interrupt, otherwise bail */
2099 if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
2100 goto tw_interrupt_bail;
2101
2102 handled = 1;
2103
2104 /* If we are resetting, bail */
2105 if (test_bit(TW_IN_RESET, &tw_dev->flags))
2106 goto tw_interrupt_bail;
2107
2108 /* Check controller for errors */
2109 if (tw_check_bits(status_reg_value)) {
2110 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2111 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2112 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2113 goto tw_interrupt_bail;
2114 }
2115 }
2116
2117 /* Handle host interrupt */
2118 if (status_reg_value & TW_STATUS_HOST_INTERRUPT) {
2119 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received host interrupt.\n");
2120 TW_CLEAR_HOST_INTERRUPT(tw_dev);
2121 }
2122
2123 /* Handle attention interrupt */
2124 if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
2125 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received attention interrupt.\n");
2126 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
2127 tw_state_request_start(tw_dev, &request_id);
2128 error = tw_aen_read_queue(tw_dev, request_id);
2129 if (error) {
2130 printk(KERN_WARNING "3w-xxxx: scsi%d: Error reading aen queue.\n", tw_dev->host->host_no);
2131 tw_dev->state[request_id] = TW_S_COMPLETED;
2132 tw_state_request_finish(tw_dev, request_id);
2133 }
2134 }
2135
2136 /* Handle command interrupt */
2137 if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
2138 /* Drain as many pending commands as we can */
2139 while (tw_dev->pending_request_count > 0) {
2140 request_id = tw_dev->pending_queue[tw_dev->pending_head];
2141 if (tw_dev->state[request_id] != TW_S_PENDING) {
2142 printk(KERN_WARNING "3w-xxxx: scsi%d: Found request id that wasn't pending.\n", tw_dev->host->host_no);
2143 break;
2144 }
2145 if (tw_post_command_packet(tw_dev, request_id)==0) {
2146 if (tw_dev->pending_head == TW_Q_LENGTH-1) {
2147 tw_dev->pending_head = TW_Q_START;
2148 } else {
2149 tw_dev->pending_head = tw_dev->pending_head + 1;
2150 }
2151 tw_dev->pending_request_count--;
2152 } else {
2153 /* If we get here, we will continue re-posting on the next command interrupt */
2154 break;
2155 }
2156 }
2157 /* If there are no more pending requests, we mask command interrupt */
2158 if (tw_dev->pending_request_count == 0)
2159 TW_MASK_COMMAND_INTERRUPT(tw_dev);
2160 }
2161
2162 /* Handle response interrupt */
2163 if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
2164 /* Drain the response queue from the board */
2165 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
2166 /* Read response queue register */
2167 response_que.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
2168 request_id = TW_RESID_OUT(response_que.response_id);
2169 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
2170 error = 0;
2171
2172 /* Check for bad response */
2173 if (command_packet->status != 0) {
2174 /* If internal command, don't error, don't fill sense */
2175 if (tw_dev->srb[request_id] == NULL) {
2176 tw_decode_sense(tw_dev, request_id, 0);
2177 } else {
2178 error = tw_decode_sense(tw_dev, request_id, 1);
2179 }
2180 }
2181
2182 /* Check for correct state */
2183 if (tw_dev->state[request_id] != TW_S_POSTED) {
2184 if (tw_dev->srb[request_id] != NULL) {
2185 printk(KERN_WARNING "3w-xxxx: scsi%d: Received a request id that wasn't posted.\n", tw_dev->host->host_no);
2186 error = 1;
2187 }
2188 }
2189
2190 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Response queue request id: %d.\n", request_id);
2191
2192 /* Check for internal command completion */
2193 if (tw_dev->srb[request_id] == NULL) {
2194 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Found internally posted command.\n");
2195 /* Check for chrdev ioctl completion */
2196 if (request_id != tw_dev->chrdev_request_id) {
2197 retval = tw_aen_complete(tw_dev, request_id);
2198 if (retval) {
2199 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing aen.\n", tw_dev->host->host_no);
2200 }
2201 } else {
2202 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
2203 wake_up(&tw_dev->ioctl_wqueue);
2204 }
2205 } else {
2206 switch (tw_dev->srb[request_id]->cmnd[0]) {
2207 case READ_10:
2208 case READ_6:
2209 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_10/READ_6\n");
2210 break;
2211 case WRITE_10:
2212 case WRITE_6:
2213 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught WRITE_10/WRITE_6\n");
2214 break;
2215 case TEST_UNIT_READY:
2216 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught TEST_UNIT_READY\n");
2217 error = tw_scsiop_test_unit_ready_complete(tw_dev, request_id);
2218 break;
2219 case INQUIRY:
2220 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught INQUIRY\n");
2221 error = tw_scsiop_inquiry_complete(tw_dev, request_id);
2222 break;
2223 case READ_CAPACITY:
2224 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_CAPACITY\n");
2225 error = tw_scsiop_read_capacity_complete(tw_dev, request_id);
2226 break;
2227 case MODE_SENSE:
2228 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught MODE_SENSE\n");
2229 error = tw_scsiop_mode_sense_complete(tw_dev, request_id);
2230 break;
2231 case SYNCHRONIZE_CACHE:
2232 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught SYNCHRONIZE_CACHE\n");
2233 break;
2234 default:
2235 printk(KERN_WARNING "3w-xxxx: case slip in tw_interrupt()\n");
2236 error = 1;
2237 }
2238
2239 /* If no error command was a success */
2240 if (error == 0) {
2241 tw_dev->srb[request_id]->result = (DID_OK << 16);
2242 }
2243
2244 /* If error, command failed */
2245 if (error == 1) {
2246 /* Ask for a host reset */
2247 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
2248 }
2249
2250 /* Now complete the io */
2251 if ((error != TW_ISR_DONT_COMPLETE)) {
2252 tw_dev->state[request_id] = TW_S_COMPLETED;
2253 tw_state_request_finish(tw_dev, request_id);
2254 tw_dev->posted_request_count--;
2255 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
2256
2257 tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
2258 }
2259 }
2260
2261 /* Check for valid status after each drain */
2262 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2263 if (tw_check_bits(status_reg_value)) {
2264 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2265 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2266 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2267 goto tw_interrupt_bail;
2268 }
2269 }
2270 }
2271 }
2272
2273 tw_interrupt_bail:
2274 spin_unlock(tw_dev->host->host_lock);
2275 return IRQ_RETVAL(handled);
2276 } /* End tw_interrupt() */
2277
2278 /* This function tells the controller to shut down */
2279 static void __tw_shutdown(TW_Device_Extension *tw_dev)
2280 {
2281 /* Disable interrupts */
2282 TW_DISABLE_INTERRUPTS(tw_dev);
2283
2284 /* Free up the IRQ */
2285 free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
2286
2287 printk(KERN_WARNING "3w-xxxx: Shutting down host %d.\n", tw_dev->host->host_no);
2288
2289 /* Tell the card we are shutting down */
2290 if (tw_initconnection(tw_dev, 1)) {
2291 printk(KERN_WARNING "3w-xxxx: Connection shutdown failed.\n");
2292 } else {
2293 printk(KERN_WARNING "3w-xxxx: Shutdown complete.\n");
2294 }
2295
2296 /* Clear all interrupts just before exit */
2297 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2298 } /* End __tw_shutdown() */
2299
2300 /* Wrapper for __tw_shutdown */
2301 static void tw_shutdown(struct pci_dev *pdev)
2302 {
2303 struct Scsi_Host *host = pci_get_drvdata(pdev);
2304 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2305
2306 __tw_shutdown(tw_dev);
2307 } /* End tw_shutdown() */
2308
2309 static struct scsi_host_template driver_template = {
2310 .module = THIS_MODULE,
2311 .name = "3ware Storage Controller",
2312 .queuecommand = tw_scsi_queue,
2313 .eh_host_reset_handler = tw_scsi_eh_reset,
2314 .bios_param = tw_scsi_biosparam,
2315 .change_queue_depth = tw_change_queue_depth,
2316 .can_queue = TW_Q_LENGTH-2,
2317 .this_id = -1,
2318 .sg_tablesize = TW_MAX_SGL_LENGTH,
2319 .max_sectors = TW_MAX_SECTORS,
2320 .cmd_per_lun = TW_MAX_CMDS_PER_LUN,
2321 .use_clustering = ENABLE_CLUSTERING,
2322 .shost_attrs = tw_host_attrs,
2323 .emulated = 1
2324 };
2325
2326 /* This function will probe and initialize a card */
2327 static int __devinit tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
2328 {
2329 struct Scsi_Host *host = NULL;
2330 TW_Device_Extension *tw_dev;
2331 int retval = -ENODEV;
2332
2333 retval = pci_enable_device(pdev);
2334 if (retval) {
2335 printk(KERN_WARNING "3w-xxxx: Failed to enable pci device.");
2336 goto out_disable_device;
2337 }
2338
2339 pci_set_master(pdev);
2340
2341 retval = pci_set_dma_mask(pdev, TW_DMA_MASK);
2342 if (retval) {
2343 printk(KERN_WARNING "3w-xxxx: Failed to set dma mask.");
2344 goto out_disable_device;
2345 }
2346
2347 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2348 if (!host) {
2349 printk(KERN_WARNING "3w-xxxx: Failed to allocate memory for device extension.");
2350 retval = -ENOMEM;
2351 goto out_disable_device;
2352 }
2353 tw_dev = (TW_Device_Extension *)host->hostdata;
2354
2355 memset(tw_dev, 0, sizeof(TW_Device_Extension));
2356
2357 /* Save values to device extension */
2358 tw_dev->host = host;
2359 tw_dev->tw_pci_dev = pdev;
2360
2361 if (tw_initialize_device_extension(tw_dev)) {
2362 printk(KERN_WARNING "3w-xxxx: Failed to initialize device extension.");
2363 goto out_free_device_extension;
2364 }
2365
2366 /* Request IO regions */
2367 retval = pci_request_regions(pdev, "3w-xxxx");
2368 if (retval) {
2369 printk(KERN_WARNING "3w-xxxx: Failed to get mem region.");
2370 goto out_free_device_extension;
2371 }
2372
2373 /* Save base address */
2374 tw_dev->base_addr = pci_resource_start(pdev, 0);
2375 if (!tw_dev->base_addr) {
2376 printk(KERN_WARNING "3w-xxxx: Failed to get io address.");
2377 goto out_release_mem_region;
2378 }
2379
2380 /* Disable interrupts on the card */
2381 TW_DISABLE_INTERRUPTS(tw_dev);
2382
2383 /* Initialize the card */
2384 if (tw_reset_sequence(tw_dev))
2385 goto out_release_mem_region;
2386
2387 /* Set host specific parameters */
2388 host->max_id = TW_MAX_UNITS;
2389 host->max_cmd_len = TW_MAX_CDB_LEN;
2390
2391 /* Luns and channels aren't supported by adapter */
2392 host->max_lun = 0;
2393 host->max_channel = 0;
2394
2395 /* Register the card with the kernel SCSI layer */
2396 retval = scsi_add_host(host, &pdev->dev);
2397 if (retval) {
2398 printk(KERN_WARNING "3w-xxxx: scsi add host failed");
2399 goto out_release_mem_region;
2400 }
2401
2402 pci_set_drvdata(pdev, host);
2403
2404 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);
2405
2406 /* Now setup the interrupt handler */
2407 retval = request_irq(pdev->irq, tw_interrupt, IRQF_SHARED, "3w-xxxx", tw_dev);
2408 if (retval) {
2409 printk(KERN_WARNING "3w-xxxx: Error requesting IRQ.");
2410 goto out_remove_host;
2411 }
2412
2413 tw_device_extension_list[tw_device_extension_count] = tw_dev;
2414 tw_device_extension_count++;
2415
2416 /* Re-enable interrupts on the card */
2417 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2418
2419 /* Finally, scan the host */
2420 scsi_scan_host(host);
2421
2422 if (twe_major == -1) {
2423 if ((twe_major = register_chrdev (0, "twe", &tw_fops)) < 0)
2424 printk(KERN_WARNING "3w-xxxx: Failed to register character device.");
2425 }
2426 return 0;
2427
2428 out_remove_host:
2429 scsi_remove_host(host);
2430 out_release_mem_region:
2431 pci_release_regions(pdev);
2432 out_free_device_extension:
2433 tw_free_device_extension(tw_dev);
2434 scsi_host_put(host);
2435 out_disable_device:
2436 pci_disable_device(pdev);
2437
2438 return retval;
2439 } /* End tw_probe() */
2440
2441 /* This function is called to remove a device */
2442 static void tw_remove(struct pci_dev *pdev)
2443 {
2444 struct Scsi_Host *host = pci_get_drvdata(pdev);
2445 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2446
2447 scsi_remove_host(tw_dev->host);
2448
2449 /* Unregister character device */
2450 if (twe_major >= 0) {
2451 unregister_chrdev(twe_major, "twe");
2452 twe_major = -1;
2453 }
2454
2455 /* Shutdown the card */
2456 __tw_shutdown(tw_dev);
2457
2458 /* Free up the mem region */
2459 pci_release_regions(pdev);
2460
2461 /* Free up device extension resources */
2462 tw_free_device_extension(tw_dev);
2463
2464 scsi_host_put(tw_dev->host);
2465 pci_disable_device(pdev);
2466 tw_device_extension_count--;
2467 } /* End tw_remove() */
2468
2469 /* PCI Devices supported by this driver */
2470 static struct pci_device_id tw_pci_tbl[] __devinitdata = {
2471 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_1000,
2472 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2473 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_7000,
2474 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2475 { }
2476 };
2477 MODULE_DEVICE_TABLE(pci, tw_pci_tbl);
2478
2479 /* pci_driver initializer */
2480 static struct pci_driver tw_driver = {
2481 .name = "3w-xxxx",
2482 .id_table = tw_pci_tbl,
2483 .probe = tw_probe,
2484 .remove = tw_remove,
2485 .shutdown = tw_shutdown,
2486 };
2487
2488 /* This function is called on driver initialization */
2489 static int __init tw_init(void)
2490 {
2491 printk(KERN_WARNING "3ware Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2492
2493 return pci_register_driver(&tw_driver);
2494 } /* End tw_init() */
2495
2496 /* This function is called on driver exit */
2497 static void __exit tw_exit(void)
2498 {
2499 pci_unregister_driver(&tw_driver);
2500 } /* End tw_exit() */
2501
2502 module_init(tw_init);
2503 module_exit(tw_exit);
2504
linux v2.6.22.y-op