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clocksource: armada-370-xp: Get reference fixed-clock by name
[linux-2.6.git] / drivers / scsi / 3w-xxxx.c
blobb9276d10b25c2e277c05e1b6e48e196a11b38fa4
1 /*
2 3w-xxxx.c -- 3ware Storage Controller device driver for Linux.
3
4 Written By: Adam Radford <linuxraid@lsi.com>
5 Modifications By: Joel Jacobson <linux@3ware.com>
6 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
7 Brad Strand <linux@3ware.com>
8
9 Copyright (C) 1999-2010 3ware Inc.
10
11 Kernel compatibility By: Andre Hedrick <andre@suse.com>
12 Non-Copyright (C) 2000 Andre Hedrick <andre@suse.com>
13
14 Further tiny build fixes and trivial hoovering Alan Cox
15
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; version 2 of the License.
19
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
24
25 NO WARRANTY
26 THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
27 CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
28 LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
29 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
30 solely responsible for determining the appropriateness of using and
31 distributing the Program and assumes all risks associated with its
32 exercise of rights under this Agreement, including but not limited to
33 the risks and costs of program errors, damage to or loss of data,
34 programs or equipment, and unavailability or interruption of operations.
35
36 DISCLAIMER OF LIABILITY
37 NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
38 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39 DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
40 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
41 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
42 USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
43 HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
44
45 You should have received a copy of the GNU General Public License
46 along with this program; if not, write to the Free Software
47 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
48
49 Bugs/Comments/Suggestions should be mailed to:
50 linuxraid@lsi.com
51
52 For more information, goto:
53 http://www.lsi.com
54
55 History
56 -------
57 0.1.000 - Initial release.
58 0.4.000 - Added support for Asynchronous Event Notification through
59 ioctls for 3DM.
60 1.0.000 - Added DPO & FUA bit support for WRITE_10 & WRITE_6 cdb
61 to disable drive write-cache before writes.
62 1.1.000 - Fixed performance bug with DPO & FUA not existing for WRITE_6.
63 1.2.000 - Added support for clean shutdown notification/feature table.
64 1.02.00.001 - Added support for full command packet posts through ioctls
65 for 3DM.
66 Bug fix so hot spare drives don't show up.
67 1.02.00.002 - Fix bug with tw_setfeature() call that caused oops on some
68 systems.
69 08/21/00 - release previously allocated resources on failure at
70 tw_allocate_memory (acme)
71 1.02.00.003 - Fix tw_interrupt() to report error to scsi layer when
72 controller status is non-zero.
73 Added handling of request_sense opcode.
74 Fix possible null pointer dereference in
75 tw_reset_device_extension()
76 1.02.00.004 - Add support for device id of 3ware 7000 series controllers.
77 Make tw_setfeature() call with interrupts disabled.
78 Register interrupt handler before enabling interrupts.
79 Clear attention interrupt before draining aen queue.
80 1.02.00.005 - Allocate bounce buffers and custom queue depth for raid5 for
81 6000 and 5000 series controllers.
82 Reduce polling mdelays causing problems on some systems.
83 Fix use_sg = 1 calculation bug.
84 Check for scsi_register returning NULL.
85 Add aen count to /proc/scsi/3w-xxxx.
86 Remove aen code unit masking in tw_aen_complete().
87 1.02.00.006 - Remove unit from printk in tw_scsi_eh_abort(), causing
88 possible oops.
89 Fix possible null pointer dereference in tw_scsi_queue()
90 if done function pointer was invalid.
91 1.02.00.007 - Fix possible null pointer dereferences in tw_ioctl().
92 Remove check for invalid done function pointer from
93 tw_scsi_queue().
94 1.02.00.008 - Set max sectors per io to TW_MAX_SECTORS in tw_findcards().
95 Add tw_decode_error() for printing readable error messages.
96 Print some useful information on certain aen codes.
97 Add tw_decode_bits() for interpreting status register output.
98 Make scsi_set_pci_device() for kernels >= 2.4.4
99 Fix bug where aen's could be lost before a reset.
100 Re-add spinlocks in tw_scsi_detect().
101 Fix possible null pointer dereference in tw_aen_drain_queue()
102 during initialization.
103 Clear pci parity errors during initialization and during io.
104 1.02.00.009 - Remove redundant increment in tw_state_request_start().
105 Add ioctl support for direct ATA command passthru.
106 Add entire aen code string list.
107 1.02.00.010 - Cleanup queueing code, fix jbod thoughput.
108 Fix get_param for specific units.
109 1.02.00.011 - Fix bug in tw_aen_complete() where aen's could be lost.
110 Fix tw_aen_drain_queue() to display useful info at init.
111 Set tw_host->max_id for 12 port cards.
112 Add ioctl support for raw command packet post from userspace
113 with sglist fragments (parameter and io).
114 1.02.00.012 - Fix read capacity to under report by 1 sector to fix get
115 last sector ioctl.
116 1.02.00.013 - Fix bug where more AEN codes weren't coming out during
117 driver initialization.
118 Improved handling of PCI aborts.
119 1.02.00.014 - Fix bug in tw_findcards() where AEN code could be lost.
120 Increase timeout in tw_aen_drain_queue() to 30 seconds.
121 1.02.00.015 - Re-write raw command post with data ioctl method.
122 Remove raid5 bounce buffers for raid5 for 6XXX for kernel 2.5
123 Add tw_map/unmap_scsi_sg/single_data() for kernel 2.5
124 Replace io_request_lock with host_lock for kernel 2.5
125 Set max_cmd_len to 16 for 3dm for kernel 2.5
126 1.02.00.016 - Set host->max_sectors back up to 256.
127 1.02.00.017 - Modified pci parity error handling/clearing from config space
128 during initialization.
129 1.02.00.018 - Better handling of request sense opcode and sense information
130 for failed commands. Add tw_decode_sense().
131 Replace all mdelay()'s with scsi_sleep().
132 1.02.00.019 - Revert mdelay's and scsi_sleep's, this caused problems on
133 some SMP systems.
134 1.02.00.020 - Add pci_set_dma_mask(), rewrite kmalloc()/virt_to_bus() to
135 pci_alloc/free_consistent().
136 Better alignment checking in tw_allocate_memory().
137 Cleanup tw_initialize_device_extension().
138 1.02.00.021 - Bump cmd_per_lun in SHT to 255 for better jbod performance.
139 Improve handling of errors in tw_interrupt().
140 Add handling/clearing of controller queue error.
141 Empty stale responses before draining aen queue.
142 Fix tw_scsi_eh_abort() to not reset on every io abort.
143 Set can_queue in SHT to 255 to prevent hang from AEN.
144 1.02.00.022 - Fix possible null pointer dereference in tw_scsi_release().
145 1.02.00.023 - Fix bug in tw_aen_drain_queue() where unit # was always zero.
146 1.02.00.024 - Add severity levels to AEN strings.
147 1.02.00.025 - Fix command interrupt spurious error messages.
148 Fix bug in raw command post with data ioctl method.
149 Fix bug where rollcall sometimes failed with cable errors.
150 Print unit # on all command timeouts.
151 1.02.00.026 - Fix possible infinite retry bug with power glitch induced
152 drive timeouts.
153 Cleanup some AEN severity levels.
154 1.02.00.027 - Add drive not supported AEN code for SATA controllers.
155 Remove spurious unknown ioctl error message.
156 1.02.00.028 - Fix bug where multiple controllers with no units were the
157 same card number.
158 Fix bug where cards were being shut down more than once.
159 1.02.00.029 - Add missing pci_free_consistent() in tw_allocate_memory().
160 Replace pci_map_single() with pci_map_page() for highmem.
161 Check for tw_setfeature() failure.
162 1.02.00.030 - Make driver 64-bit clean.
163 1.02.00.031 - Cleanup polling timeouts/routines in several places.
164 Add support for mode sense opcode.
165 Add support for cache mode page.
166 Add support for synchronize cache opcode.
167 1.02.00.032 - Fix small multicard rollcall bug.
168 Make driver stay loaded with no units for hot add/swap.
169 Add support for "twe" character device for ioctls.
170 Clean up request_id queueing code.
171 Fix tw_scsi_queue() spinlocks.
172 1.02.00.033 - Fix tw_aen_complete() to not queue 'queue empty' AEN's.
173 Initialize queues correctly when loading with no valid units.
174 1.02.00.034 - Fix tw_decode_bits() to handle multiple errors.
175 Add support for user configurable cmd_per_lun.
176 Add support for sht->slave_configure().
177 1.02.00.035 - Improve tw_allocate_memory() memory allocation.
178 Fix tw_chrdev_ioctl() to sleep correctly.
179 1.02.00.036 - Increase character ioctl timeout to 60 seconds.
180 1.02.00.037 - Fix tw_ioctl() to handle all non-data ATA passthru cmds
181 for 'smartmontools' support.
182 1.26.00.038 - Roll driver minor version to 26 to denote kernel 2.6.
183 Add support for cmds_per_lun module parameter.
184 1.26.00.039 - Fix bug in tw_chrdev_ioctl() polling code.
185 Fix data_buffer_length usage in tw_chrdev_ioctl().
186 Update contact information.
187 1.26.02.000 - Convert driver to pci_driver format.
188 1.26.02.001 - Increase max ioctl buffer size to 512 sectors.
189 Make tw_scsi_queue() return 0 for 'Unknown scsi opcode'.
190 Fix tw_remove() to free irq handler/unregister_chrdev()
191 before shutting down card.
192 Change to new 'change_queue_depth' api.
193 Fix 'handled=1' ISR usage, remove bogus IRQ check.
194 1.26.02.002 - Free irq handler in __tw_shutdown().
195 Turn on RCD bit for caching mode page.
196 Serialize reset code.
197 1.26.02.003 - Force 60 second timeout default.
198 */
199
200 #include <linux/module.h>
201 #include <linux/reboot.h>
202 #include <linux/spinlock.h>
203 #include <linux/interrupt.h>
204 #include <linux/moduleparam.h>
205 #include <linux/errno.h>
206 #include <linux/types.h>
207 #include <linux/delay.h>
208 #include <linux/gfp.h>
209 #include <linux/pci.h>
210 #include <linux/time.h>
211 #include <linux/mutex.h>
212 #include <asm/io.h>
213 #include <asm/irq.h>
214 #include <asm/uaccess.h>
215 #include <scsi/scsi.h>
216 #include <scsi/scsi_host.h>
217 #include <scsi/scsi_tcq.h>
218 #include <scsi/scsi_cmnd.h>
219 #include <scsi/scsi_eh.h>
220 #include "3w-xxxx.h"
221
222 /* Globals */
223 #define TW_DRIVER_VERSION "1.26.02.003"
224 static DEFINE_MUTEX(tw_mutex);
225 static TW_Device_Extension *tw_device_extension_list[TW_MAX_SLOT];
226 static int tw_device_extension_count = 0;
227 static int twe_major = -1;
228
229 /* Module parameters */
230 MODULE_AUTHOR("LSI");
231 MODULE_DESCRIPTION("3ware Storage Controller Linux Driver");
232 MODULE_LICENSE("GPL");
233 MODULE_VERSION(TW_DRIVER_VERSION);
234
235 /* Function prototypes */
236 static int tw_reset_device_extension(TW_Device_Extension *tw_dev);
237
238 /* Functions */
239
240 /* This function will check the status register for unexpected bits */
241 static int tw_check_bits(u32 status_reg_value)
242 {
243 if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS) {
244 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): No expected bits (0x%x).\n", status_reg_value);
245 return 1;
246 }
247 if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0) {
248 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): Found unexpected bits (0x%x).\n", status_reg_value);
249 return 1;
250 }
251
252 return 0;
253 } /* End tw_check_bits() */
254
255 /* This function will print readable messages from status register errors */
256 static int tw_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value, int print_host)
257 {
258 char host[16];
259
260 dprintk(KERN_WARNING "3w-xxxx: tw_decode_bits()\n");
261
262 if (print_host)
263 sprintf(host, " scsi%d:", tw_dev->host->host_no);
264 else
265 host[0] = '\0';
266
267 if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) {
268 printk(KERN_WARNING "3w-xxxx:%s PCI Parity Error: clearing.\n", host);
269 outl(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
270 }
271
272 if (status_reg_value & TW_STATUS_PCI_ABORT) {
273 printk(KERN_WARNING "3w-xxxx:%s PCI Abort: clearing.\n", host);
274 outl(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev));
275 pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT);
276 }
277
278 if (status_reg_value & TW_STATUS_QUEUE_ERROR) {
279 printk(KERN_WARNING "3w-xxxx:%s Controller Queue Error: clearing.\n", host);
280 outl(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
281 }
282
283 if (status_reg_value & TW_STATUS_SBUF_WRITE_ERROR) {
284 printk(KERN_WARNING "3w-xxxx:%s SBUF Write Error: clearing.\n", host);
285 outl(TW_CONTROL_CLEAR_SBUF_WRITE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
286 }
287
288 if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
289 if (tw_dev->reset_print == 0) {
290 printk(KERN_WARNING "3w-xxxx:%s Microcontroller Error: clearing.\n", host);
291 tw_dev->reset_print = 1;
292 }
293 return 1;
294 }
295
296 return 0;
297 } /* End tw_decode_bits() */
298
299 /* This function will poll the status register for a flag */
300 static int tw_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds)
301 {
302 u32 status_reg_value;
303 unsigned long before;
304 int retval = 1;
305
306 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
307 before = jiffies;
308
309 if (tw_check_bits(status_reg_value))
310 tw_decode_bits(tw_dev, status_reg_value, 0);
311
312 while ((status_reg_value & flag) != flag) {
313 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
314
315 if (tw_check_bits(status_reg_value))
316 tw_decode_bits(tw_dev, status_reg_value, 0);
317
318 if (time_after(jiffies, before + HZ * seconds))
319 goto out;
320
321 msleep(50);
322 }
323 retval = 0;
324 out:
325 return retval;
326 } /* End tw_poll_status() */
327
328 /* This function will poll the status register for disappearance of a flag */
329 static int tw_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds)
330 {
331 u32 status_reg_value;
332 unsigned long before;
333 int retval = 1;
334
335 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
336 before = jiffies;
337
338 if (tw_check_bits(status_reg_value))
339 tw_decode_bits(tw_dev, status_reg_value, 0);
340
341 while ((status_reg_value & flag) != 0) {
342 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
343
344 if (tw_check_bits(status_reg_value))
345 tw_decode_bits(tw_dev, status_reg_value, 0);
346
347 if (time_after(jiffies, before + HZ * seconds))
348 goto out;
349
350 msleep(50);
351 }
352 retval = 0;
353 out:
354 return retval;
355 } /* End tw_poll_status_gone() */
356
357 /* This function will attempt to post a command packet to the board */
358 static int tw_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
359 {
360 u32 status_reg_value;
361 unsigned long command_que_value;
362
363 dprintk(KERN_NOTICE "3w-xxxx: tw_post_command_packet()\n");
364 command_que_value = tw_dev->command_packet_physical_address[request_id];
365 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
366
367 if (tw_check_bits(status_reg_value)) {
368 dprintk(KERN_WARNING "3w-xxxx: tw_post_command_packet(): Unexpected bits.\n");
369 tw_decode_bits(tw_dev, status_reg_value, 1);
370 }
371
372 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
373 /* We successfully posted the command packet */
374 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
375 tw_dev->state[request_id] = TW_S_POSTED;
376 tw_dev->posted_request_count++;
377 if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) {
378 tw_dev->max_posted_request_count = tw_dev->posted_request_count;
379 }
380 } else {
381 /* Couldn't post the command packet, so we do it in the isr */
382 if (tw_dev->state[request_id] != TW_S_PENDING) {
383 tw_dev->state[request_id] = TW_S_PENDING;
384 tw_dev->pending_request_count++;
385 if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) {
386 tw_dev->max_pending_request_count = tw_dev->pending_request_count;
387 }
388 tw_dev->pending_queue[tw_dev->pending_tail] = request_id;
389 if (tw_dev->pending_tail == TW_Q_LENGTH-1) {
390 tw_dev->pending_tail = TW_Q_START;
391 } else {
392 tw_dev->pending_tail = tw_dev->pending_tail + 1;
393 }
394 }
395 TW_UNMASK_COMMAND_INTERRUPT(tw_dev);
396 return 1;
397 }
398 return 0;
399 } /* End tw_post_command_packet() */
400
401 /* This function will return valid sense buffer information for failed cmds */
402 static int tw_decode_sense(TW_Device_Extension *tw_dev, int request_id, int fill_sense)
403 {
404 int i;
405 TW_Command *command;
406
407 dprintk(KERN_WARNING "3w-xxxx: tw_decode_sense()\n");
408 command = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
409
410 printk(KERN_WARNING "3w-xxxx: scsi%d: Command failed: status = 0x%x, flags = 0x%x, unit #%d.\n", tw_dev->host->host_no, command->status, command->flags, TW_UNIT_OUT(command->unit__hostid));
411
412 /* Attempt to return intelligent sense information */
413 if (fill_sense) {
414 if ((command->status == 0xc7) || (command->status == 0xcb)) {
415 for (i = 0; i < ARRAY_SIZE(tw_sense_table); i++) {
416 if (command->flags == tw_sense_table[i][0]) {
417
418 /* Valid bit and 'current errors' */
419 tw_dev->srb[request_id]->sense_buffer[0] = (0x1 << 7 | 0x70);
420
421 /* Sense key */
422 tw_dev->srb[request_id]->sense_buffer[2] = tw_sense_table[i][1];
423
424 /* Additional sense length */
425 tw_dev->srb[request_id]->sense_buffer[7] = 0xa; /* 10 bytes */
426
427 /* Additional sense code */
428 tw_dev->srb[request_id]->sense_buffer[12] = tw_sense_table[i][2];
429
430 /* Additional sense code qualifier */
431 tw_dev->srb[request_id]->sense_buffer[13] = tw_sense_table[i][3];
432
433 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
434 return TW_ISR_DONT_RESULT; /* Special case for isr to not over-write result */
435 }
436 }
437 }
438
439 /* If no table match, error so we get a reset */
440 return 1;
441 }
442
443 return 0;
444 } /* End tw_decode_sense() */
445
446 /* This function will report controller error status */
447 static int tw_check_errors(TW_Device_Extension *tw_dev)
448 {
449 u32 status_reg_value;
450
451 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
452
453 if (TW_STATUS_ERRORS(status_reg_value) || tw_check_bits(status_reg_value)) {
454 tw_decode_bits(tw_dev, status_reg_value, 0);
455 return 1;
456 }
457
458 return 0;
459 } /* End tw_check_errors() */
460
461 /* This function will empty the response que */
462 static void tw_empty_response_que(TW_Device_Extension *tw_dev)
463 {
464 u32 status_reg_value, response_que_value;
465
466 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
467
468 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
469 response_que_value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
470 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
471 }
472 } /* End tw_empty_response_que() */
473
474 /* This function will free a request_id */
475 static void tw_state_request_finish(TW_Device_Extension *tw_dev, int request_id)
476 {
477 tw_dev->free_queue[tw_dev->free_tail] = request_id;
478 tw_dev->state[request_id] = TW_S_FINISHED;
479 tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
480 } /* End tw_state_request_finish() */
481
482 /* This function will assign an available request_id */
483 static void tw_state_request_start(TW_Device_Extension *tw_dev, int *request_id)
484 {
485 *request_id = tw_dev->free_queue[tw_dev->free_head];
486 tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
487 tw_dev->state[*request_id] = TW_S_STARTED;
488 } /* End tw_state_request_start() */
489
490 /* Show some statistics about the card */
491 static ssize_t tw_show_stats(struct device *dev, struct device_attribute *attr,
492 char *buf)
493 {
494 struct Scsi_Host *host = class_to_shost(dev);
495 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
496 unsigned long flags = 0;
497 ssize_t len;
498
499 spin_lock_irqsave(tw_dev->host->host_lock, flags);
500 len = snprintf(buf, PAGE_SIZE, "3w-xxxx Driver version: %s\n"
501 "Current commands posted: %4d\n"
502 "Max commands posted: %4d\n"
503 "Current pending commands: %4d\n"
504 "Max pending commands: %4d\n"
505 "Last sgl length: %4d\n"
506 "Max sgl length: %4d\n"
507 "Last sector count: %4d\n"
508 "Max sector count: %4d\n"
509 "SCSI Host Resets: %4d\n"
510 "AEN's: %4d\n",
511 TW_DRIVER_VERSION,
512 tw_dev->posted_request_count,
513 tw_dev->max_posted_request_count,
514 tw_dev->pending_request_count,
515 tw_dev->max_pending_request_count,
516 tw_dev->sgl_entries,
517 tw_dev->max_sgl_entries,
518 tw_dev->sector_count,
519 tw_dev->max_sector_count,
520 tw_dev->num_resets,
521 tw_dev->aen_count);
522 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
523 return len;
524 } /* End tw_show_stats() */
525
526 /* This function will set a devices queue depth */
527 static int tw_change_queue_depth(struct scsi_device *sdev, int queue_depth,
528 int reason)
529 {
530 if (reason != SCSI_QDEPTH_DEFAULT)
531 return -EOPNOTSUPP;
532
533 if (queue_depth > TW_Q_LENGTH-2)
534 queue_depth = TW_Q_LENGTH-2;
535 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
536 return queue_depth;
537 } /* End tw_change_queue_depth() */
538
539 /* Create sysfs 'stats' entry */
540 static struct device_attribute tw_host_stats_attr = {
541 .attr = {
542 .name = "stats",
543 .mode = S_IRUGO,
544 },
545 .show = tw_show_stats
546 };
547
548 /* Host attributes initializer */
549 static struct device_attribute *tw_host_attrs[] = {
550 &tw_host_stats_attr,
551 NULL,
552 };
553
554 /* This function will read the aen queue from the isr */
555 static int tw_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
556 {
557 TW_Command *command_packet;
558 TW_Param *param;
559 unsigned long command_que_value;
560 u32 status_reg_value;
561 unsigned long param_value = 0;
562
563 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_read_queue()\n");
564
565 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
566 if (tw_check_bits(status_reg_value)) {
567 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Unexpected bits.\n");
568 tw_decode_bits(tw_dev, status_reg_value, 1);
569 return 1;
570 }
571 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
572 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet virtual address.\n");
573 return 1;
574 }
575 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
576 memset(command_packet, 0, sizeof(TW_Sector));
577 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
578 command_packet->size = 4;
579 command_packet->request_id = request_id;
580 command_packet->status = 0;
581 command_packet->flags = 0;
582 command_packet->byte6.parameter_count = 1;
583 command_que_value = tw_dev->command_packet_physical_address[request_id];
584 if (command_que_value == 0) {
585 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet physical address.\n");
586 return 1;
587 }
588 /* Now setup the param */
589 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
590 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment virtual address.\n");
591 return 1;
592 }
593 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
594 memset(param, 0, sizeof(TW_Sector));
595 param->table_id = 0x401; /* AEN table */
596 param->parameter_id = 2; /* Unit code */
597 param->parameter_size_bytes = 2;
598 param_value = tw_dev->alignment_physical_address[request_id];
599 if (param_value == 0) {
600 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment physical address.\n");
601 return 1;
602 }
603 command_packet->byte8.param.sgl[0].address = param_value;
604 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
605
606 /* Now post the command packet */
607 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
608 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post succeeded.\n");
609 tw_dev->srb[request_id] = NULL; /* Flag internal command */
610 tw_dev->state[request_id] = TW_S_POSTED;
611 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
612 } else {
613 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post failed, will retry.\n");
614 return 1;
615 }
616
617 return 0;
618 } /* End tw_aen_read_queue() */
619
620 /* This function will complete an aen request from the isr */
621 static int tw_aen_complete(TW_Device_Extension *tw_dev, int request_id)
622 {
623 TW_Param *param;
624 unsigned short aen;
625 int error = 0, table_max = 0;
626
627 dprintk(KERN_WARNING "3w-xxxx: tw_aen_complete()\n");
628 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
629 printk(KERN_WARNING "3w-xxxx: tw_aen_complete(): Bad alignment virtual address.\n");
630 return 1;
631 }
632 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
633 aen = *(unsigned short *)(param->data);
634 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_complete(): Queue'd code 0x%x\n", aen);
635
636 /* Print some useful info when certain aen codes come out */
637 if (aen == 0x0ff) {
638 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: INFO: AEN queue overflow.\n", tw_dev->host->host_no);
639 } else {
640 table_max = ARRAY_SIZE(tw_aen_string);
641 if ((aen & 0x0ff) < table_max) {
642 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
643 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s%d.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff], aen >> 8);
644 } else {
645 if (aen != 0x0)
646 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff]);
647 }
648 } else {
649 printk(KERN_WARNING "3w-xxxx: scsi%d: Received AEN %d.\n", tw_dev->host->host_no, aen);
650 }
651 }
652 if (aen != TW_AEN_QUEUE_EMPTY) {
653 tw_dev->aen_count++;
654
655 /* Now queue the code */
656 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
657 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
658 tw_dev->aen_tail = TW_Q_START;
659 } else {
660 tw_dev->aen_tail = tw_dev->aen_tail + 1;
661 }
662 if (tw_dev->aen_head == tw_dev->aen_tail) {
663 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
664 tw_dev->aen_head = TW_Q_START;
665 } else {
666 tw_dev->aen_head = tw_dev->aen_head + 1;
667 }
668 }
669
670 error = tw_aen_read_queue(tw_dev, request_id);
671 if (error) {
672 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing AEN.\n", tw_dev->host->host_no);
673 tw_dev->state[request_id] = TW_S_COMPLETED;
674 tw_state_request_finish(tw_dev, request_id);
675 }
676 } else {
677 tw_dev->state[request_id] = TW_S_COMPLETED;
678 tw_state_request_finish(tw_dev, request_id);
679 }
680
681 return 0;
682 } /* End tw_aen_complete() */
683
684 /* This function will drain the aen queue after a soft reset */
685 static int tw_aen_drain_queue(TW_Device_Extension *tw_dev)
686 {
687 TW_Command *command_packet;
688 TW_Param *param;
689 int request_id = 0;
690 unsigned long command_que_value;
691 unsigned long param_value;
692 TW_Response_Queue response_queue;
693 unsigned short aen;
694 unsigned short aen_code;
695 int finished = 0;
696 int first_reset = 0;
697 int queue = 0;
698 int found = 0, table_max = 0;
699
700 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_drain_queue()\n");
701
702 if (tw_poll_status(tw_dev, TW_STATUS_ATTENTION_INTERRUPT | TW_STATUS_MICROCONTROLLER_READY, 30)) {
703 dprintk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): No attention interrupt for card %d.\n", tw_device_extension_count);
704 return 1;
705 }
706 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
707
708 /* Empty response queue */
709 tw_empty_response_que(tw_dev);
710
711 /* Initialize command packet */
712 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
713 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet virtual address.\n");
714 return 1;
715 }
716 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
717 memset(command_packet, 0, sizeof(TW_Sector));
718 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
719 command_packet->size = 4;
720 command_packet->request_id = request_id;
721 command_packet->status = 0;
722 command_packet->flags = 0;
723 command_packet->byte6.parameter_count = 1;
724 command_que_value = tw_dev->command_packet_physical_address[request_id];
725 if (command_que_value == 0) {
726 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet physical address.\n");
727 return 1;
728 }
729
730 /* Now setup the param */
731 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
732 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment virtual address.\n");
733 return 1;
734 }
735 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
736 memset(param, 0, sizeof(TW_Sector));
737 param->table_id = 0x401; /* AEN table */
738 param->parameter_id = 2; /* Unit code */
739 param->parameter_size_bytes = 2;
740 param_value = tw_dev->alignment_physical_address[request_id];
741 if (param_value == 0) {
742 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment physical address.\n");
743 return 1;
744 }
745 command_packet->byte8.param.sgl[0].address = param_value;
746 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
747
748 /* Now drain the controller's aen queue */
749 do {
750 /* Post command packet */
751 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
752
753 /* Now poll for completion */
754 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
755 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
756 request_id = TW_RESID_OUT(response_queue.response_id);
757
758 if (request_id != 0) {
759 /* Unexpected request id */
760 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Unexpected request id.\n");
761 return 1;
762 }
763
764 if (command_packet->status != 0) {
765 if (command_packet->flags != TW_AEN_TABLE_UNDEFINED) {
766 /* Bad response */
767 tw_decode_sense(tw_dev, request_id, 0);
768 return 1;
769 } else {
770 /* We know this is a 3w-1x00, and doesn't support aen's */
771 return 0;
772 }
773 }
774
775 /* Now check the aen */
776 aen = *(unsigned short *)(param->data);
777 aen_code = (aen & 0x0ff);
778 queue = 0;
779 switch (aen_code) {
780 case TW_AEN_QUEUE_EMPTY:
781 dprintk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
782 if (first_reset != 1) {
783 return 1;
784 } else {
785 finished = 1;
786 }
787 break;
788 case TW_AEN_SOFT_RESET:
789 if (first_reset == 0) {
790 first_reset = 1;
791 } else {
792 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
793 tw_dev->aen_count++;
794 queue = 1;
795 }
796 break;
797 default:
798 if (aen == 0x0ff) {
799 printk(KERN_WARNING "3w-xxxx: AEN: INFO: AEN queue overflow.\n");
800 } else {
801 table_max = ARRAY_SIZE(tw_aen_string);
802 if ((aen & 0x0ff) < table_max) {
803 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
804 printk(KERN_WARNING "3w-xxxx: AEN: %s%d.\n", tw_aen_string[aen & 0xff], aen >> 8);
805 } else {
806 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
807 }
808 } else
809 printk(KERN_WARNING "3w-xxxx: Received AEN %d.\n", aen);
810 }
811 tw_dev->aen_count++;
812 queue = 1;
813 }
814
815 /* Now put the aen on the aen_queue */
816 if (queue == 1) {
817 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
818 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
819 tw_dev->aen_tail = TW_Q_START;
820 } else {
821 tw_dev->aen_tail = tw_dev->aen_tail + 1;
822 }
823 if (tw_dev->aen_head == tw_dev->aen_tail) {
824 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
825 tw_dev->aen_head = TW_Q_START;
826 } else {
827 tw_dev->aen_head = tw_dev->aen_head + 1;
828 }
829 }
830 }
831 found = 1;
832 }
833 if (found == 0) {
834 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Response never received.\n");
835 return 1;
836 }
837 } while (finished == 0);
838
839 return 0;
840 } /* End tw_aen_drain_queue() */
841
842 /* This function will allocate memory */
843 static int tw_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
844 {
845 int i;
846 dma_addr_t dma_handle;
847 unsigned long *cpu_addr = NULL;
848
849 dprintk(KERN_NOTICE "3w-xxxx: tw_allocate_memory()\n");
850
851 cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
852 if (cpu_addr == NULL) {
853 printk(KERN_WARNING "3w-xxxx: pci_alloc_consistent() failed.\n");
854 return 1;
855 }
856
857 if ((unsigned long)cpu_addr % (tw_dev->tw_pci_dev->device == TW_DEVICE_ID ? TW_ALIGNMENT_6000 : TW_ALIGNMENT_7000)) {
858 printk(KERN_WARNING "3w-xxxx: Couldn't allocate correctly aligned memory.\n");
859 pci_free_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, cpu_addr, dma_handle);
860 return 1;
861 }
862
863 memset(cpu_addr, 0, size*TW_Q_LENGTH);
864
865 for (i=0;i<TW_Q_LENGTH;i++) {
866 switch(which) {
867 case 0:
868 tw_dev->command_packet_physical_address[i] = dma_handle+(i*size);
869 tw_dev->command_packet_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
870 break;
871 case 1:
872 tw_dev->alignment_physical_address[i] = dma_handle+(i*size);
873 tw_dev->alignment_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
874 break;
875 default:
876 printk(KERN_WARNING "3w-xxxx: tw_allocate_memory(): case slip in tw_allocate_memory()\n");
877 return 1;
878 }
879 }
880
881 return 0;
882 } /* End tw_allocate_memory() */
883
884 /* This function handles ioctl for the character device */
885 static long tw_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
886 {
887 int request_id;
888 dma_addr_t dma_handle;
889 unsigned short tw_aen_code;
890 unsigned long flags;
891 unsigned int data_buffer_length = 0;
892 unsigned long data_buffer_length_adjusted = 0;
893 struct inode *inode = file_inode(file);
894 unsigned long *cpu_addr;
895 long timeout;
896 TW_New_Ioctl *tw_ioctl;
897 TW_Passthru *passthru;
898 TW_Device_Extension *tw_dev = tw_device_extension_list[iminor(inode)];
899 int retval = -EFAULT;
900 void __user *argp = (void __user *)arg;
901
902 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl()\n");
903
904 mutex_lock(&tw_mutex);
905 /* Only let one of these through at a time */
906 if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
907 mutex_unlock(&tw_mutex);
908 return -EINTR;
909 }
910
911 /* First copy down the buffer length */
912 if (copy_from_user(&data_buffer_length, argp, sizeof(unsigned int)))
913 goto out;
914
915 /* Check size */
916 if (data_buffer_length > TW_MAX_IOCTL_SECTORS * 512) {
917 retval = -EINVAL;
918 goto out;
919 }
920
921 /* Hardware can only do multiple of 512 byte transfers */
922 data_buffer_length_adjusted = (data_buffer_length + 511) & ~511;
923
924 /* Now allocate ioctl buf memory */
925 cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, &dma_handle, GFP_KERNEL);
926 if (cpu_addr == NULL) {
927 retval = -ENOMEM;
928 goto out;
929 }
930
931 tw_ioctl = (TW_New_Ioctl *)cpu_addr;
932
933 /* Now copy down the entire ioctl */
934 if (copy_from_user(tw_ioctl, argp, data_buffer_length + sizeof(TW_New_Ioctl) - 1))
935 goto out2;
936
937 passthru = (TW_Passthru *)&tw_ioctl->firmware_command;
938
939 /* See which ioctl we are doing */
940 switch (cmd) {
941 case TW_OP_NOP:
942 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_OP_NOP.\n");
943 break;
944 case TW_OP_AEN_LISTEN:
945 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_AEN_LISTEN.\n");
946 memset(tw_ioctl->data_buffer, 0, data_buffer_length);
947
948 spin_lock_irqsave(tw_dev->host->host_lock, flags);
949 if (tw_dev->aen_head == tw_dev->aen_tail) {
950 tw_aen_code = TW_AEN_QUEUE_EMPTY;
951 } else {
952 tw_aen_code = tw_dev->aen_queue[tw_dev->aen_head];
953 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
954 tw_dev->aen_head = TW_Q_START;
955 } else {
956 tw_dev->aen_head = tw_dev->aen_head + 1;
957 }
958 }
959 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
960 memcpy(tw_ioctl->data_buffer, &tw_aen_code, sizeof(tw_aen_code));
961 break;
962 case TW_CMD_PACKET_WITH_DATA:
963 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_CMD_PACKET_WITH_DATA.\n");
964 spin_lock_irqsave(tw_dev->host->host_lock, flags);
965
966 tw_state_request_start(tw_dev, &request_id);
967
968 /* Flag internal command */
969 tw_dev->srb[request_id] = NULL;
970
971 /* Flag chrdev ioctl */
972 tw_dev->chrdev_request_id = request_id;
973
974 tw_ioctl->firmware_command.request_id = request_id;
975
976 /* Load the sg list */
977 switch (TW_SGL_OUT(tw_ioctl->firmware_command.opcode__sgloffset)) {
978 case 2:
979 tw_ioctl->firmware_command.byte8.param.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
980 tw_ioctl->firmware_command.byte8.param.sgl[0].length = data_buffer_length_adjusted;
981 break;
982 case 3:
983 tw_ioctl->firmware_command.byte8.io.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
984 tw_ioctl->firmware_command.byte8.io.sgl[0].length = data_buffer_length_adjusted;
985 break;
986 case 5:
987 passthru->sg_list[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
988 passthru->sg_list[0].length = data_buffer_length_adjusted;
989 break;
990 }
991
992 memcpy(tw_dev->command_packet_virtual_address[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command));
993
994 /* Now post the command packet to the controller */
995 tw_post_command_packet(tw_dev, request_id);
996 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
997
998 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
999
1000 /* Now wait for the command to complete */
1001 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
1002
1003 /* We timed out, and didn't get an interrupt */
1004 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
1005 /* Now we need to reset the board */
1006 printk(KERN_WARNING "3w-xxxx: scsi%d: Character ioctl (0x%x) timed out, resetting card.\n", tw_dev->host->host_no, cmd);
1007 retval = -EIO;
1008 if (tw_reset_device_extension(tw_dev)) {
1009 printk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): Reset failed for card %d.\n", tw_dev->host->host_no);
1010 }
1011 goto out2;
1012 }
1013
1014 /* Now copy in the command packet response */
1015 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virtual_address[request_id], sizeof(TW_Command));
1016
1017 /* Now complete the io */
1018 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1019 tw_dev->posted_request_count--;
1020 tw_dev->state[request_id] = TW_S_COMPLETED;
1021 tw_state_request_finish(tw_dev, request_id);
1022 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1023 break;
1024 default:
1025 retval = -ENOTTY;
1026 goto out2;
1027 }
1028
1029 /* Now copy the response to userspace */
1030 if (copy_to_user(argp, tw_ioctl, sizeof(TW_New_Ioctl) + data_buffer_length - 1))
1031 goto out2;
1032 retval = 0;
1033 out2:
1034 /* Now free ioctl buf memory */
1035 dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, cpu_addr, dma_handle);
1036 out:
1037 mutex_unlock(&tw_dev->ioctl_lock);
1038 mutex_unlock(&tw_mutex);
1039 return retval;
1040 } /* End tw_chrdev_ioctl() */
1041
1042 /* This function handles open for the character device */
1043 /* NOTE that this function races with remove. */
1044 static int tw_chrdev_open(struct inode *inode, struct file *file)
1045 {
1046 unsigned int minor_number;
1047
1048 dprintk(KERN_WARNING "3w-xxxx: tw_ioctl_open()\n");
1049
1050 minor_number = iminor(inode);
1051 if (minor_number >= tw_device_extension_count)
1052 return -ENODEV;
1053
1054 return 0;
1055 } /* End tw_chrdev_open() */
1056
1057 /* File operations struct for character device */
1058 static const struct file_operations tw_fops = {
1059 .owner = THIS_MODULE,
1060 .unlocked_ioctl = tw_chrdev_ioctl,
1061 .open = tw_chrdev_open,
1062 .release = NULL,
1063 .llseek = noop_llseek,
1064 };
1065
1066 /* This function will free up device extension resources */
1067 static void tw_free_device_extension(TW_Device_Extension *tw_dev)
1068 {
1069 dprintk(KERN_NOTICE "3w-xxxx: tw_free_device_extension()\n");
1070
1071 /* Free command packet and generic buffer memory */
1072 if (tw_dev->command_packet_virtual_address[0])
1073 pci_free_consistent(tw_dev->tw_pci_dev, sizeof(TW_Command)*TW_Q_LENGTH, tw_dev->command_packet_virtual_address[0], tw_dev->command_packet_physical_address[0]);
1074
1075 if (tw_dev->alignment_virtual_address[0])
1076 pci_free_consistent(tw_dev->tw_pci_dev, sizeof(TW_Sector)*TW_Q_LENGTH, tw_dev->alignment_virtual_address[0], tw_dev->alignment_physical_address[0]);
1077 } /* End tw_free_device_extension() */
1078
1079 /* This function will send an initconnection command to controller */
1080 static int tw_initconnection(TW_Device_Extension *tw_dev, int message_credits)
1081 {
1082 unsigned long command_que_value;
1083 TW_Command *command_packet;
1084 TW_Response_Queue response_queue;
1085 int request_id = 0;
1086
1087 dprintk(KERN_NOTICE "3w-xxxx: tw_initconnection()\n");
1088
1089 /* Initialize InitConnection command packet */
1090 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1091 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet virtual address.\n");
1092 return 1;
1093 }
1094
1095 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1096 memset(command_packet, 0, sizeof(TW_Sector));
1097 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_INIT_CONNECTION);
1098 command_packet->size = TW_INIT_COMMAND_PACKET_SIZE;
1099 command_packet->request_id = request_id;
1100 command_packet->status = 0x0;
1101 command_packet->flags = 0x0;
1102 command_packet->byte6.message_credits = message_credits;
1103 command_packet->byte8.init_connection.response_queue_pointer = 0x0;
1104 command_que_value = tw_dev->command_packet_physical_address[request_id];
1105
1106 if (command_que_value == 0) {
1107 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet physical address.\n");
1108 return 1;
1109 }
1110
1111 /* Send command packet to the board */
1112 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1113
1114 /* Poll for completion */
1115 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1116 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1117 request_id = TW_RESID_OUT(response_queue.response_id);
1118
1119 if (request_id != 0) {
1120 /* unexpected request id */
1121 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Unexpected request id.\n");
1122 return 1;
1123 }
1124 if (command_packet->status != 0) {
1125 /* bad response */
1126 tw_decode_sense(tw_dev, request_id, 0);
1127 return 1;
1128 }
1129 }
1130 return 0;
1131 } /* End tw_initconnection() */
1132
1133 /* Set a value in the features table */
1134 static int tw_setfeature(TW_Device_Extension *tw_dev, int parm, int param_size,
1135 unsigned char *val)
1136 {
1137 TW_Param *param;
1138 TW_Command *command_packet;
1139 TW_Response_Queue response_queue;
1140 int request_id = 0;
1141 unsigned long command_que_value;
1142 unsigned long param_value;
1143
1144 /* Initialize SetParam command packet */
1145 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1146 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet virtual address.\n");
1147 return 1;
1148 }
1149 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1150 memset(command_packet, 0, sizeof(TW_Sector));
1151 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1152
1153 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
1154 param->table_id = 0x404; /* Features table */
1155 param->parameter_id = parm;
1156 param->parameter_size_bytes = param_size;
1157 memcpy(param->data, val, param_size);
1158
1159 param_value = tw_dev->alignment_physical_address[request_id];
1160 if (param_value == 0) {
1161 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad alignment physical address.\n");
1162 tw_dev->state[request_id] = TW_S_COMPLETED;
1163 tw_state_request_finish(tw_dev, request_id);
1164 tw_dev->srb[request_id]->result = (DID_OK << 16);
1165 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1166 }
1167 command_packet->byte8.param.sgl[0].address = param_value;
1168 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1169
1170 command_packet->size = 4;
1171 command_packet->request_id = request_id;
1172 command_packet->byte6.parameter_count = 1;
1173
1174 command_que_value = tw_dev->command_packet_physical_address[request_id];
1175 if (command_que_value == 0) {
1176 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet physical address.\n");
1177 return 1;
1178 }
1179
1180 /* Send command packet to the board */
1181 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1182
1183 /* Poll for completion */
1184 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1185 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1186 request_id = TW_RESID_OUT(response_queue.response_id);
1187
1188 if (request_id != 0) {
1189 /* unexpected request id */
1190 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Unexpected request id.\n");
1191 return 1;
1192 }
1193 if (command_packet->status != 0) {
1194 /* bad response */
1195 tw_decode_sense(tw_dev, request_id, 0);
1196 return 1;
1197 }
1198 }
1199
1200 return 0;
1201 } /* End tw_setfeature() */
1202
1203 /* This function will reset a controller */
1204 static int tw_reset_sequence(TW_Device_Extension *tw_dev)
1205 {
1206 int error = 0;
1207 int tries = 0;
1208 unsigned char c = 1;
1209
1210 /* Reset the board */
1211 while (tries < TW_MAX_RESET_TRIES) {
1212 TW_SOFT_RESET(tw_dev);
1213
1214 error = tw_aen_drain_queue(tw_dev);
1215 if (error) {
1216 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN drain failed, retrying.\n", tw_dev->host->host_no);
1217 tries++;
1218 continue;
1219 }
1220
1221 /* Check for controller errors */
1222 if (tw_check_errors(tw_dev)) {
1223 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors found, retrying.\n", tw_dev->host->host_no);
1224 tries++;
1225 continue;
1226 }
1227
1228 /* Now the controller is in a good state */
1229 break;
1230 }
1231
1232 if (tries >= TW_MAX_RESET_TRIES) {
1233 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors, card not responding, check all cabling.\n", tw_dev->host->host_no);
1234 return 1;
1235 }
1236
1237 error = tw_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS);
1238 if (error) {
1239 printk(KERN_WARNING "3w-xxxx: scsi%d: Connection initialization failed.\n", tw_dev->host->host_no);
1240 return 1;
1241 }
1242
1243 error = tw_setfeature(tw_dev, 2, 1, &c);
1244 if (error) {
1245 printk(KERN_WARNING "3w-xxxx: Unable to set features for card, probable old firmware or card.\n");
1246 }
1247
1248 return 0;
1249 } /* End tw_reset_sequence() */
1250
1251 /* This function will initialize the fields of a device extension */
1252 static int tw_initialize_device_extension(TW_Device_Extension *tw_dev)
1253 {
1254 int i, error=0;
1255
1256 dprintk(KERN_NOTICE "3w-xxxx: tw_initialize_device_extension()\n");
1257
1258 /* Initialize command packet buffers */
1259 error = tw_allocate_memory(tw_dev, sizeof(TW_Command), 0);
1260 if (error) {
1261 printk(KERN_WARNING "3w-xxxx: Command packet memory allocation failed.\n");
1262 return 1;
1263 }
1264
1265 /* Initialize generic buffer */
1266 error = tw_allocate_memory(tw_dev, sizeof(TW_Sector), 1);
1267 if (error) {
1268 printk(KERN_WARNING "3w-xxxx: Generic memory allocation failed.\n");
1269 return 1;
1270 }
1271
1272 for (i=0;i<TW_Q_LENGTH;i++) {
1273 tw_dev->free_queue[i] = i;
1274 tw_dev->state[i] = TW_S_INITIAL;
1275 }
1276
1277 tw_dev->pending_head = TW_Q_START;
1278 tw_dev->pending_tail = TW_Q_START;
1279 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1280
1281 mutex_init(&tw_dev->ioctl_lock);
1282 init_waitqueue_head(&tw_dev->ioctl_wqueue);
1283
1284 return 0;
1285 } /* End tw_initialize_device_extension() */
1286
1287 static int tw_map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
1288 {
1289 int use_sg;
1290
1291 dprintk(KERN_WARNING "3w-xxxx: tw_map_scsi_sg_data()\n");
1292
1293 use_sg = scsi_dma_map(cmd);
1294 if (use_sg < 0) {
1295 printk(KERN_WARNING "3w-xxxx: tw_map_scsi_sg_data(): pci_map_sg() failed.\n");
1296 return 0;
1297 }
1298
1299 cmd->SCp.phase = TW_PHASE_SGLIST;
1300 cmd->SCp.have_data_in = use_sg;
1301
1302 return use_sg;
1303 } /* End tw_map_scsi_sg_data() */
1304
1305 static void tw_unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
1306 {
1307 dprintk(KERN_WARNING "3w-xxxx: tw_unmap_scsi_data()\n");
1308
1309 if (cmd->SCp.phase == TW_PHASE_SGLIST)
1310 scsi_dma_unmap(cmd);
1311 } /* End tw_unmap_scsi_data() */
1312
1313 /* This function will reset a device extension */
1314 static int tw_reset_device_extension(TW_Device_Extension *tw_dev)
1315 {
1316 int i = 0;
1317 struct scsi_cmnd *srb;
1318 unsigned long flags = 0;
1319
1320 dprintk(KERN_NOTICE "3w-xxxx: tw_reset_device_extension()\n");
1321
1322 set_bit(TW_IN_RESET, &tw_dev->flags);
1323 TW_DISABLE_INTERRUPTS(tw_dev);
1324 TW_MASK_COMMAND_INTERRUPT(tw_dev);
1325 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1326
1327 /* Abort all requests that are in progress */
1328 for (i=0;i<TW_Q_LENGTH;i++) {
1329 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1330 (tw_dev->state[i] != TW_S_INITIAL) &&
1331 (tw_dev->state[i] != TW_S_COMPLETED)) {
1332 srb = tw_dev->srb[i];
1333 if (srb != NULL) {
1334 srb->result = (DID_RESET << 16);
1335 tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);
1336 tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[i]);
1337 }
1338 }
1339 }
1340
1341 /* Reset queues and counts */
1342 for (i=0;i<TW_Q_LENGTH;i++) {
1343 tw_dev->free_queue[i] = i;
1344 tw_dev->state[i] = TW_S_INITIAL;
1345 }
1346 tw_dev->free_head = TW_Q_START;
1347 tw_dev->free_tail = TW_Q_START;
1348 tw_dev->posted_request_count = 0;
1349 tw_dev->pending_request_count = 0;
1350 tw_dev->pending_head = TW_Q_START;
1351 tw_dev->pending_tail = TW_Q_START;
1352 tw_dev->reset_print = 0;
1353
1354 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1355
1356 if (tw_reset_sequence(tw_dev)) {
1357 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset sequence failed.\n", tw_dev->host->host_no);
1358 return 1;
1359 }
1360
1361 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
1362 clear_bit(TW_IN_RESET, &tw_dev->flags);
1363 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1364
1365 return 0;
1366 } /* End tw_reset_device_extension() */
1367
1368 /* This funciton returns unit geometry in cylinders/heads/sectors */
1369 static int tw_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev,
1370 sector_t capacity, int geom[])
1371 {
1372 int heads, sectors, cylinders;
1373 TW_Device_Extension *tw_dev;
1374
1375 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam()\n");
1376 tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
1377
1378 heads = 64;
1379 sectors = 32;
1380 cylinders = sector_div(capacity, heads * sectors);
1381
1382 if (capacity >= 0x200000) {
1383 heads = 255;
1384 sectors = 63;
1385 cylinders = sector_div(capacity, heads * sectors);
1386 }
1387
1388 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam(): heads = %d, sectors = %d, cylinders = %d\n", heads, sectors, cylinders);
1389 geom[0] = heads;
1390 geom[1] = sectors;
1391 geom[2] = cylinders;
1392
1393 return 0;
1394 } /* End tw_scsi_biosparam() */
1395
1396 /* This is the new scsi eh reset function */
1397 static int tw_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1398 {
1399 TW_Device_Extension *tw_dev=NULL;
1400 int retval = FAILED;
1401
1402 tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1403
1404 tw_dev->num_resets++;
1405
1406 sdev_printk(KERN_WARNING, SCpnt->device,
1407 "WARNING: Command (0x%x) timed out, resetting card.\n",
1408 SCpnt->cmnd[0]);
1409
1410 /* Make sure we are not issuing an ioctl or resetting from ioctl */
1411 mutex_lock(&tw_dev->ioctl_lock);
1412
1413 /* Now reset the card and some of the device extension data */
1414 if (tw_reset_device_extension(tw_dev)) {
1415 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset failed.\n", tw_dev->host->host_no);
1416 goto out;
1417 }
1418
1419 retval = SUCCESS;
1420 out:
1421 mutex_unlock(&tw_dev->ioctl_lock);
1422 return retval;
1423 } /* End tw_scsi_eh_reset() */
1424
1425 /* This function handles scsi inquiry commands */
1426 static int tw_scsiop_inquiry(TW_Device_Extension *tw_dev, int request_id)
1427 {
1428 TW_Param *param;
1429 TW_Command *command_packet;
1430 unsigned long command_que_value;
1431 unsigned long param_value;
1432
1433 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry()\n");
1434
1435 /* Initialize command packet */
1436 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1437 if (command_packet == NULL) {
1438 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet virtual address.\n");
1439 return 1;
1440 }
1441 memset(command_packet, 0, sizeof(TW_Sector));
1442 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1443 command_packet->size = 4;
1444 command_packet->request_id = request_id;
1445 command_packet->status = 0;
1446 command_packet->flags = 0;
1447 command_packet->byte6.parameter_count = 1;
1448
1449 /* Now setup the param */
1450 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1451 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment virtual address.\n");
1452 return 1;
1453 }
1454 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1455 memset(param, 0, sizeof(TW_Sector));
1456 param->table_id = 3; /* unit summary table */
1457 param->parameter_id = 3; /* unitsstatus parameter */
1458 param->parameter_size_bytes = TW_MAX_UNITS;
1459 param_value = tw_dev->alignment_physical_address[request_id];
1460 if (param_value == 0) {
1461 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment physical address.\n");
1462 return 1;
1463 }
1464
1465 command_packet->byte8.param.sgl[0].address = param_value;
1466 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1467 command_que_value = tw_dev->command_packet_physical_address[request_id];
1468 if (command_que_value == 0) {
1469 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet physical address.\n");
1470 return 1;
1471 }
1472
1473 /* Now try to post the command packet */
1474 tw_post_command_packet(tw_dev, request_id);
1475
1476 return 0;
1477 } /* End tw_scsiop_inquiry() */
1478
1479 static void tw_transfer_internal(TW_Device_Extension *tw_dev, int request_id,
1480 void *data, unsigned int len)
1481 {
1482 scsi_sg_copy_from_buffer(tw_dev->srb[request_id], data, len);
1483 }
1484
1485 /* This function is called by the isr to complete an inquiry command */
1486 static int tw_scsiop_inquiry_complete(TW_Device_Extension *tw_dev, int request_id)
1487 {
1488 unsigned char *is_unit_present;
1489 unsigned char request_buffer[36];
1490 TW_Param *param;
1491
1492 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry_complete()\n");
1493
1494 memset(request_buffer, 0, sizeof(request_buffer));
1495 request_buffer[0] = TYPE_DISK; /* Peripheral device type */
1496 request_buffer[1] = 0; /* Device type modifier */
1497 request_buffer[2] = 0; /* No ansi/iso compliance */
1498 request_buffer[4] = 31; /* Additional length */
1499 memcpy(&request_buffer[8], "3ware ", 8); /* Vendor ID */
1500 sprintf(&request_buffer[16], "Logical Disk %-2d ", tw_dev->srb[request_id]->device->id);
1501 memcpy(&request_buffer[32], TW_DRIVER_VERSION, 3);
1502 tw_transfer_internal(tw_dev, request_id, request_buffer,
1503 sizeof(request_buffer));
1504
1505 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1506 if (param == NULL) {
1507 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry_complete(): Bad alignment virtual address.\n");
1508 return 1;
1509 }
1510 is_unit_present = &(param->data[0]);
1511
1512 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1513 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1514 } else {
1515 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1516 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1517 return TW_ISR_DONT_RESULT;
1518 }
1519
1520 return 0;
1521 } /* End tw_scsiop_inquiry_complete() */
1522
1523 /* This function handles scsi mode_sense commands */
1524 static int tw_scsiop_mode_sense(TW_Device_Extension *tw_dev, int request_id)
1525 {
1526 TW_Param *param;
1527 TW_Command *command_packet;
1528 unsigned long command_que_value;
1529 unsigned long param_value;
1530
1531 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense()\n");
1532
1533 /* Only page control = 0, page code = 0x8 (cache page) supported */
1534 if (tw_dev->srb[request_id]->cmnd[2] != 0x8) {
1535 tw_dev->state[request_id] = TW_S_COMPLETED;
1536 tw_state_request_finish(tw_dev, request_id);
1537 tw_dev->srb[request_id]->result = (DID_OK << 16);
1538 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1539 return 0;
1540 }
1541
1542 /* Now read firmware cache setting for this unit */
1543 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1544 if (command_packet == NULL) {
1545 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet virtual address.\n");
1546 return 1;
1547 }
1548
1549 /* Setup the command packet */
1550 memset(command_packet, 0, sizeof(TW_Sector));
1551 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1552 command_packet->size = 4;
1553 command_packet->request_id = request_id;
1554 command_packet->status = 0;
1555 command_packet->flags = 0;
1556 command_packet->byte6.parameter_count = 1;
1557
1558 /* Setup the param */
1559 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1560 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment virtual address.\n");
1561 return 1;
1562 }
1563
1564 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1565 memset(param, 0, sizeof(TW_Sector));
1566 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE + tw_dev->srb[request_id]->device->id;
1567 param->parameter_id = 7; /* unit flags */
1568 param->parameter_size_bytes = 1;
1569 param_value = tw_dev->alignment_physical_address[request_id];
1570 if (param_value == 0) {
1571 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment physical address.\n");
1572 return 1;
1573 }
1574
1575 command_packet->byte8.param.sgl[0].address = param_value;
1576 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1577 command_que_value = tw_dev->command_packet_physical_address[request_id];
1578 if (command_que_value == 0) {
1579 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet physical address.\n");
1580 return 1;
1581 }
1582
1583 /* Now try to post the command packet */
1584 tw_post_command_packet(tw_dev, request_id);
1585
1586 return 0;
1587 } /* End tw_scsiop_mode_sense() */
1588
1589 /* This function is called by the isr to complete a mode sense command */
1590 static int tw_scsiop_mode_sense_complete(TW_Device_Extension *tw_dev, int request_id)
1591 {
1592 TW_Param *param;
1593 unsigned char *flags;
1594 unsigned char request_buffer[8];
1595
1596 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense_complete()\n");
1597
1598 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1599 if (param == NULL) {
1600 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense_complete(): Bad alignment virtual address.\n");
1601 return 1;
1602 }
1603 flags = (char *)&(param->data[0]);
1604 memset(request_buffer, 0, sizeof(request_buffer));
1605
1606 request_buffer[0] = 0xf; /* mode data length */
1607 request_buffer[1] = 0; /* default medium type */
1608 request_buffer[2] = 0x10; /* dpo/fua support on */
1609 request_buffer[3] = 0; /* no block descriptors */
1610 request_buffer[4] = 0x8; /* caching page */
1611 request_buffer[5] = 0xa; /* page length */
1612 if (*flags & 0x1)
1613 request_buffer[6] = 0x5; /* WCE on, RCD on */
1614 else
1615 request_buffer[6] = 0x1; /* WCE off, RCD on */
1616 tw_transfer_internal(tw_dev, request_id, request_buffer,
1617 sizeof(request_buffer));
1618
1619 return 0;
1620 } /* End tw_scsiop_mode_sense_complete() */
1621
1622 /* This function handles scsi read_capacity commands */
1623 static int tw_scsiop_read_capacity(TW_Device_Extension *tw_dev, int request_id)
1624 {
1625 TW_Param *param;
1626 TW_Command *command_packet;
1627 unsigned long command_que_value;
1628 unsigned long param_value;
1629
1630 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity()\n");
1631
1632 /* Initialize command packet */
1633 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1634
1635 if (command_packet == NULL) {
1636 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet virtual address.\n");
1637 return 1;
1638 }
1639 memset(command_packet, 0, sizeof(TW_Sector));
1640 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1641 command_packet->size = 4;
1642 command_packet->request_id = request_id;
1643 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1644 command_packet->status = 0;
1645 command_packet->flags = 0;
1646 command_packet->byte6.block_count = 1;
1647
1648 /* Now setup the param */
1649 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1650 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment virtual address.\n");
1651 return 1;
1652 }
1653 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1654 memset(param, 0, sizeof(TW_Sector));
1655 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE +
1656 tw_dev->srb[request_id]->device->id;
1657 param->parameter_id = 4; /* unitcapacity parameter */
1658 param->parameter_size_bytes = 4;
1659 param_value = tw_dev->alignment_physical_address[request_id];
1660 if (param_value == 0) {
1661 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment physical address.\n");
1662 return 1;
1663 }
1664
1665 command_packet->byte8.param.sgl[0].address = param_value;
1666 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1667 command_que_value = tw_dev->command_packet_physical_address[request_id];
1668 if (command_que_value == 0) {
1669 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet physical address.\n");
1670 return 1;
1671 }
1672
1673 /* Now try to post the command to the board */
1674 tw_post_command_packet(tw_dev, request_id);
1675
1676 return 0;
1677 } /* End tw_scsiop_read_capacity() */
1678
1679 /* This function is called by the isr to complete a readcapacity command */
1680 static int tw_scsiop_read_capacity_complete(TW_Device_Extension *tw_dev, int request_id)
1681 {
1682 unsigned char *param_data;
1683 u32 capacity;
1684 char buff[8];
1685 TW_Param *param;
1686
1687 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete()\n");
1688
1689 memset(buff, 0, sizeof(buff));
1690 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1691 if (param == NULL) {
1692 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_capacity_complete(): Bad alignment virtual address.\n");
1693 return 1;
1694 }
1695 param_data = &(param->data[0]);
1696
1697 capacity = (param_data[3] << 24) | (param_data[2] << 16) |
1698 (param_data[1] << 8) | param_data[0];
1699
1700 /* Subtract one sector to fix get last sector ioctl */
1701 capacity -= 1;
1702
1703 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete(): Capacity = 0x%x.\n", capacity);
1704
1705 /* Number of LBA's */
1706 buff[0] = (capacity >> 24);
1707 buff[1] = (capacity >> 16) & 0xff;
1708 buff[2] = (capacity >> 8) & 0xff;
1709 buff[3] = capacity & 0xff;
1710
1711 /* Block size in bytes (512) */
1712 buff[4] = (TW_BLOCK_SIZE >> 24);
1713 buff[5] = (TW_BLOCK_SIZE >> 16) & 0xff;
1714 buff[6] = (TW_BLOCK_SIZE >> 8) & 0xff;
1715 buff[7] = TW_BLOCK_SIZE & 0xff;
1716
1717 tw_transfer_internal(tw_dev, request_id, buff, sizeof(buff));
1718
1719 return 0;
1720 } /* End tw_scsiop_read_capacity_complete() */
1721
1722 /* This function handles scsi read or write commands */
1723 static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id)
1724 {
1725 TW_Command *command_packet;
1726 unsigned long command_que_value;
1727 u32 lba = 0x0, num_sectors = 0x0;
1728 int i, use_sg;
1729 struct scsi_cmnd *srb;
1730 struct scatterlist *sglist, *sg;
1731
1732 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write()\n");
1733
1734 srb = tw_dev->srb[request_id];
1735
1736 sglist = scsi_sglist(srb);
1737 if (!sglist) {
1738 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Request buffer NULL.\n");
1739 return 1;
1740 }
1741
1742 /* Initialize command packet */
1743 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1744 if (command_packet == NULL) {
1745 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): Bad command packet virtual address.\n");
1746 return 1;
1747 }
1748
1749 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == READ_10) {
1750 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_READ);
1751 } else {
1752 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_WRITE);
1753 }
1754
1755 command_packet->size = 3;
1756 command_packet->request_id = request_id;
1757 command_packet->unit__hostid = TW_UNITHOST_IN(0, srb->device->id);
1758 command_packet->status = 0;
1759 command_packet->flags = 0;
1760
1761 if (srb->cmnd[0] == WRITE_10) {
1762 if ((srb->cmnd[1] & 0x8) || (srb->cmnd[1] & 0x10))
1763 command_packet->flags = 1;
1764 }
1765
1766 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6) {
1767 lba = ((u32)srb->cmnd[1] << 16) | ((u32)srb->cmnd[2] << 8) | (u32)srb->cmnd[3];
1768 num_sectors = (u32)srb->cmnd[4];
1769 } else {
1770 lba = ((u32)srb->cmnd[2] << 24) | ((u32)srb->cmnd[3] << 16) | ((u32)srb->cmnd[4] << 8) | (u32)srb->cmnd[5];
1771 num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
1772 }
1773
1774 /* Update sector statistic */
1775 tw_dev->sector_count = num_sectors;
1776 if (tw_dev->sector_count > tw_dev->max_sector_count)
1777 tw_dev->max_sector_count = tw_dev->sector_count;
1778
1779 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): lba = 0x%x num_sectors = 0x%x\n", lba, num_sectors);
1780 command_packet->byte8.io.lba = lba;
1781 command_packet->byte6.block_count = num_sectors;
1782
1783 use_sg = tw_map_scsi_sg_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
1784 if (!use_sg)
1785 return 1;
1786
1787 scsi_for_each_sg(tw_dev->srb[request_id], sg, use_sg, i) {
1788 command_packet->byte8.io.sgl[i].address = sg_dma_address(sg);
1789 command_packet->byte8.io.sgl[i].length = sg_dma_len(sg);
1790 command_packet->size+=2;
1791 }
1792
1793 /* Update SG statistics */
1794 tw_dev->sgl_entries = scsi_sg_count(tw_dev->srb[request_id]);
1795 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
1796 tw_dev->max_sgl_entries = tw_dev->sgl_entries;
1797
1798 command_que_value = tw_dev->command_packet_physical_address[request_id];
1799 if (command_que_value == 0) {
1800 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Bad command packet physical address.\n");
1801 return 1;
1802 }
1803
1804 /* Now try to post the command to the board */
1805 tw_post_command_packet(tw_dev, request_id);
1806
1807 return 0;
1808 } /* End tw_scsiop_read_write() */
1809
1810 /* This function will handle the request sense scsi command */
1811 static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id)
1812 {
1813 char request_buffer[18];
1814
1815 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n");
1816
1817 memset(request_buffer, 0, sizeof(request_buffer));
1818 request_buffer[0] = 0x70; /* Immediate fixed format */
1819 request_buffer[7] = 10; /* minimum size per SPC: 18 bytes */
1820 /* leave all other fields zero, giving effectively NO_SENSE return */
1821 tw_transfer_internal(tw_dev, request_id, request_buffer,
1822 sizeof(request_buffer));
1823
1824 tw_dev->state[request_id] = TW_S_COMPLETED;
1825 tw_state_request_finish(tw_dev, request_id);
1826
1827 /* If we got a request_sense, we probably want a reset, return error */
1828 tw_dev->srb[request_id]->result = (DID_ERROR << 16);
1829 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1830
1831 return 0;
1832 } /* End tw_scsiop_request_sense() */
1833
1834 /* This function will handle synchronize cache scsi command */
1835 static int tw_scsiop_synchronize_cache(TW_Device_Extension *tw_dev, int request_id)
1836 {
1837 TW_Command *command_packet;
1838 unsigned long command_que_value;
1839
1840 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_synchronize_cache()\n");
1841
1842 /* Send firmware flush command for this unit */
1843 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1844 if (command_packet == NULL) {
1845 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet virtual address.\n");
1846 return 1;
1847 }
1848
1849 /* Setup the command packet */
1850 memset(command_packet, 0, sizeof(TW_Sector));
1851 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_FLUSH_CACHE);
1852 command_packet->size = 2;
1853 command_packet->request_id = request_id;
1854 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1855 command_packet->status = 0;
1856 command_packet->flags = 0;
1857 command_packet->byte6.parameter_count = 1;
1858 command_que_value = tw_dev->command_packet_physical_address[request_id];
1859 if (command_que_value == 0) {
1860 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet physical address.\n");
1861 return 1;
1862 }
1863
1864 /* Now try to post the command packet */
1865 tw_post_command_packet(tw_dev, request_id);
1866
1867 return 0;
1868 } /* End tw_scsiop_synchronize_cache() */
1869
1870 /* This function will handle test unit ready scsi command */
1871 static int tw_scsiop_test_unit_ready(TW_Device_Extension *tw_dev, int request_id)
1872 {
1873 TW_Param *param;
1874 TW_Command *command_packet;
1875 unsigned long command_que_value;
1876 unsigned long param_value;
1877
1878 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_test_unit_ready()\n");
1879
1880 /* Initialize command packet */
1881 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1882 if (command_packet == NULL) {
1883 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet virtual address.\n");
1884 return 1;
1885 }
1886 memset(command_packet, 0, sizeof(TW_Sector));
1887 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1888 command_packet->size = 4;
1889 command_packet->request_id = request_id;
1890 command_packet->status = 0;
1891 command_packet->flags = 0;
1892 command_packet->byte6.parameter_count = 1;
1893
1894 /* Now setup the param */
1895 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1896 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment virtual address.\n");
1897 return 1;
1898 }
1899 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1900 memset(param, 0, sizeof(TW_Sector));
1901 param->table_id = 3; /* unit summary table */
1902 param->parameter_id = 3; /* unitsstatus parameter */
1903 param->parameter_size_bytes = TW_MAX_UNITS;
1904 param_value = tw_dev->alignment_physical_address[request_id];
1905 if (param_value == 0) {
1906 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment physical address.\n");
1907 return 1;
1908 }
1909
1910 command_packet->byte8.param.sgl[0].address = param_value;
1911 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
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_test_unit_ready(): 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_test_unit_ready() */
1923
1924 /* This function is called by the isr to complete a testunitready command */
1925 static int tw_scsiop_test_unit_ready_complete(TW_Device_Extension *tw_dev, int request_id)
1926 {
1927 unsigned char *is_unit_present;
1928 TW_Param *param;
1929
1930 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete()\n");
1931
1932 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1933 if (param == NULL) {
1934 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete(): Bad alignment virtual address.\n");
1935 return 1;
1936 }
1937 is_unit_present = &(param->data[0]);
1938
1939 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1940 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1941 } else {
1942 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1943 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1944 return TW_ISR_DONT_RESULT;
1945 }
1946
1947 return 0;
1948 } /* End tw_scsiop_test_unit_ready_complete() */
1949
1950 /* This is the main scsi queue function to handle scsi opcodes */
1951 static int tw_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
1952 {
1953 unsigned char *command = SCpnt->cmnd;
1954 int request_id = 0;
1955 int retval = 1;
1956 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1957
1958 /* If we are resetting due to timed out ioctl, report as busy */
1959 if (test_bit(TW_IN_RESET, &tw_dev->flags))
1960 return SCSI_MLQUEUE_HOST_BUSY;
1961
1962 /* Save done function into Scsi_Cmnd struct */
1963 SCpnt->scsi_done = done;
1964
1965 /* Queue the command and get a request id */
1966 tw_state_request_start(tw_dev, &request_id);
1967
1968 /* Save the scsi command for use by the ISR */
1969 tw_dev->srb[request_id] = SCpnt;
1970
1971 /* Initialize phase to zero */
1972 SCpnt->SCp.phase = TW_PHASE_INITIAL;
1973
1974 switch (*command) {
1975 case READ_10:
1976 case READ_6:
1977 case WRITE_10:
1978 case WRITE_6:
1979 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ/WRITE.\n");
1980 retval = tw_scsiop_read_write(tw_dev, request_id);
1981 break;
1982 case TEST_UNIT_READY:
1983 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught TEST_UNIT_READY.\n");
1984 retval = tw_scsiop_test_unit_ready(tw_dev, request_id);
1985 break;
1986 case INQUIRY:
1987 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught INQUIRY.\n");
1988 retval = tw_scsiop_inquiry(tw_dev, request_id);
1989 break;
1990 case READ_CAPACITY:
1991 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ_CAPACITY.\n");
1992 retval = tw_scsiop_read_capacity(tw_dev, request_id);
1993 break;
1994 case REQUEST_SENSE:
1995 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught REQUEST_SENSE.\n");
1996 retval = tw_scsiop_request_sense(tw_dev, request_id);
1997 break;
1998 case MODE_SENSE:
1999 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught MODE_SENSE.\n");
2000 retval = tw_scsiop_mode_sense(tw_dev, request_id);
2001 break;
2002 case SYNCHRONIZE_CACHE:
2003 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught SYNCHRONIZE_CACHE.\n");
2004 retval = tw_scsiop_synchronize_cache(tw_dev, request_id);
2005 break;
2006 case TW_IOCTL:
2007 printk(KERN_WARNING "3w-xxxx: SCSI_IOCTL_SEND_COMMAND deprecated, please update your 3ware tools.\n");
2008 break;
2009 default:
2010 printk(KERN_NOTICE "3w-xxxx: scsi%d: Unknown scsi opcode: 0x%x\n", tw_dev->host->host_no, *command);
2011 tw_dev->state[request_id] = TW_S_COMPLETED;
2012 tw_state_request_finish(tw_dev, request_id);
2013 SCpnt->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2014 scsi_build_sense_buffer(1, SCpnt->sense_buffer, ILLEGAL_REQUEST, 0x20, 0);
2015 done(SCpnt);
2016 retval = 0;
2017 }
2018 if (retval) {
2019 tw_dev->state[request_id] = TW_S_COMPLETED;
2020 tw_state_request_finish(tw_dev, request_id);
2021 SCpnt->result = (DID_ERROR << 16);
2022 done(SCpnt);
2023 retval = 0;
2024 }
2025 return retval;
2026 } /* End tw_scsi_queue() */
2027
2028 static DEF_SCSI_QCMD(tw_scsi_queue)
2029
2030 /* This function is the interrupt service routine */
2031 static irqreturn_t tw_interrupt(int irq, void *dev_instance)
2032 {
2033 int request_id;
2034 u32 status_reg_value;
2035 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
2036 TW_Response_Queue response_que;
2037 int error = 0, retval = 0;
2038 TW_Command *command_packet;
2039 int handled = 0;
2040
2041 /* Get the host lock for io completions */
2042 spin_lock(tw_dev->host->host_lock);
2043
2044 /* Read the registers */
2045 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2046
2047 /* Check if this is our interrupt, otherwise bail */
2048 if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
2049 goto tw_interrupt_bail;
2050
2051 handled = 1;
2052
2053 /* If we are resetting, bail */
2054 if (test_bit(TW_IN_RESET, &tw_dev->flags))
2055 goto tw_interrupt_bail;
2056
2057 /* Check controller for errors */
2058 if (tw_check_bits(status_reg_value)) {
2059 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2060 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2061 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2062 goto tw_interrupt_bail;
2063 }
2064 }
2065
2066 /* Handle host interrupt */
2067 if (status_reg_value & TW_STATUS_HOST_INTERRUPT) {
2068 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received host interrupt.\n");
2069 TW_CLEAR_HOST_INTERRUPT(tw_dev);
2070 }
2071
2072 /* Handle attention interrupt */
2073 if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
2074 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received attention interrupt.\n");
2075 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
2076 tw_state_request_start(tw_dev, &request_id);
2077 error = tw_aen_read_queue(tw_dev, request_id);
2078 if (error) {
2079 printk(KERN_WARNING "3w-xxxx: scsi%d: Error reading aen queue.\n", tw_dev->host->host_no);
2080 tw_dev->state[request_id] = TW_S_COMPLETED;
2081 tw_state_request_finish(tw_dev, request_id);
2082 }
2083 }
2084
2085 /* Handle command interrupt */
2086 if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
2087 /* Drain as many pending commands as we can */
2088 while (tw_dev->pending_request_count > 0) {
2089 request_id = tw_dev->pending_queue[tw_dev->pending_head];
2090 if (tw_dev->state[request_id] != TW_S_PENDING) {
2091 printk(KERN_WARNING "3w-xxxx: scsi%d: Found request id that wasn't pending.\n", tw_dev->host->host_no);
2092 break;
2093 }
2094 if (tw_post_command_packet(tw_dev, request_id)==0) {
2095 if (tw_dev->pending_head == TW_Q_LENGTH-1) {
2096 tw_dev->pending_head = TW_Q_START;
2097 } else {
2098 tw_dev->pending_head = tw_dev->pending_head + 1;
2099 }
2100 tw_dev->pending_request_count--;
2101 } else {
2102 /* If we get here, we will continue re-posting on the next command interrupt */
2103 break;
2104 }
2105 }
2106 /* If there are no more pending requests, we mask command interrupt */
2107 if (tw_dev->pending_request_count == 0)
2108 TW_MASK_COMMAND_INTERRUPT(tw_dev);
2109 }
2110
2111 /* Handle response interrupt */
2112 if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
2113 /* Drain the response queue from the board */
2114 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
2115 /* Read response queue register */
2116 response_que.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
2117 request_id = TW_RESID_OUT(response_que.response_id);
2118 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
2119 error = 0;
2120
2121 /* Check for bad response */
2122 if (command_packet->status != 0) {
2123 /* If internal command, don't error, don't fill sense */
2124 if (tw_dev->srb[request_id] == NULL) {
2125 tw_decode_sense(tw_dev, request_id, 0);
2126 } else {
2127 error = tw_decode_sense(tw_dev, request_id, 1);
2128 }
2129 }
2130
2131 /* Check for correct state */
2132 if (tw_dev->state[request_id] != TW_S_POSTED) {
2133 if (tw_dev->srb[request_id] != NULL) {
2134 printk(KERN_WARNING "3w-xxxx: scsi%d: Received a request id that wasn't posted.\n", tw_dev->host->host_no);
2135 error = 1;
2136 }
2137 }
2138
2139 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Response queue request id: %d.\n", request_id);
2140
2141 /* Check for internal command completion */
2142 if (tw_dev->srb[request_id] == NULL) {
2143 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Found internally posted command.\n");
2144 /* Check for chrdev ioctl completion */
2145 if (request_id != tw_dev->chrdev_request_id) {
2146 retval = tw_aen_complete(tw_dev, request_id);
2147 if (retval) {
2148 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing aen.\n", tw_dev->host->host_no);
2149 }
2150 } else {
2151 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
2152 wake_up(&tw_dev->ioctl_wqueue);
2153 }
2154 } else {
2155 switch (tw_dev->srb[request_id]->cmnd[0]) {
2156 case READ_10:
2157 case READ_6:
2158 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_10/READ_6\n");
2159 break;
2160 case WRITE_10:
2161 case WRITE_6:
2162 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught WRITE_10/WRITE_6\n");
2163 break;
2164 case TEST_UNIT_READY:
2165 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught TEST_UNIT_READY\n");
2166 error = tw_scsiop_test_unit_ready_complete(tw_dev, request_id);
2167 break;
2168 case INQUIRY:
2169 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught INQUIRY\n");
2170 error = tw_scsiop_inquiry_complete(tw_dev, request_id);
2171 break;
2172 case READ_CAPACITY:
2173 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_CAPACITY\n");
2174 error = tw_scsiop_read_capacity_complete(tw_dev, request_id);
2175 break;
2176 case MODE_SENSE:
2177 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught MODE_SENSE\n");
2178 error = tw_scsiop_mode_sense_complete(tw_dev, request_id);
2179 break;
2180 case SYNCHRONIZE_CACHE:
2181 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught SYNCHRONIZE_CACHE\n");
2182 break;
2183 default:
2184 printk(KERN_WARNING "3w-xxxx: case slip in tw_interrupt()\n");
2185 error = 1;
2186 }
2187
2188 /* If no error command was a success */
2189 if (error == 0) {
2190 tw_dev->srb[request_id]->result = (DID_OK << 16);
2191 }
2192
2193 /* If error, command failed */
2194 if (error == 1) {
2195 /* Ask for a host reset */
2196 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
2197 }
2198
2199 /* Now complete the io */
2200 if ((error != TW_ISR_DONT_COMPLETE)) {
2201 tw_dev->state[request_id] = TW_S_COMPLETED;
2202 tw_state_request_finish(tw_dev, request_id);
2203 tw_dev->posted_request_count--;
2204 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
2205
2206 tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
2207 }
2208 }
2209
2210 /* Check for valid status after each drain */
2211 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2212 if (tw_check_bits(status_reg_value)) {
2213 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2214 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2215 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2216 goto tw_interrupt_bail;
2217 }
2218 }
2219 }
2220 }
2221
2222 tw_interrupt_bail:
2223 spin_unlock(tw_dev->host->host_lock);
2224 return IRQ_RETVAL(handled);
2225 } /* End tw_interrupt() */
2226
2227 /* This function tells the controller to shut down */
2228 static void __tw_shutdown(TW_Device_Extension *tw_dev)
2229 {
2230 /* Disable interrupts */
2231 TW_DISABLE_INTERRUPTS(tw_dev);
2232
2233 /* Free up the IRQ */
2234 free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
2235
2236 printk(KERN_WARNING "3w-xxxx: Shutting down host %d.\n", tw_dev->host->host_no);
2237
2238 /* Tell the card we are shutting down */
2239 if (tw_initconnection(tw_dev, 1)) {
2240 printk(KERN_WARNING "3w-xxxx: Connection shutdown failed.\n");
2241 } else {
2242 printk(KERN_WARNING "3w-xxxx: Shutdown complete.\n");
2243 }
2244
2245 /* Clear all interrupts just before exit */
2246 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2247 } /* End __tw_shutdown() */
2248
2249 /* Wrapper for __tw_shutdown */
2250 static void tw_shutdown(struct pci_dev *pdev)
2251 {
2252 struct Scsi_Host *host = pci_get_drvdata(pdev);
2253 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2254
2255 __tw_shutdown(tw_dev);
2256 } /* End tw_shutdown() */
2257
2258 /* This function gets called when a disk is coming online */
2259 static int tw_slave_configure(struct scsi_device *sdev)
2260 {
2261 /* Force 60 second timeout */
2262 blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
2263
2264 return 0;
2265 } /* End tw_slave_configure() */
2266
2267 static struct scsi_host_template driver_template = {
2268 .module = THIS_MODULE,
2269 .name = "3ware Storage Controller",
2270 .queuecommand = tw_scsi_queue,
2271 .eh_host_reset_handler = tw_scsi_eh_reset,
2272 .bios_param = tw_scsi_biosparam,
2273 .change_queue_depth = tw_change_queue_depth,
2274 .can_queue = TW_Q_LENGTH-2,
2275 .slave_configure = tw_slave_configure,
2276 .this_id = -1,
2277 .sg_tablesize = TW_MAX_SGL_LENGTH,
2278 .max_sectors = TW_MAX_SECTORS,
2279 .cmd_per_lun = TW_MAX_CMDS_PER_LUN,
2280 .use_clustering = ENABLE_CLUSTERING,
2281 .shost_attrs = tw_host_attrs,
2282 .emulated = 1
2283 };
2284
2285 /* This function will probe and initialize a card */
2286 static int tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
2287 {
2288 struct Scsi_Host *host = NULL;
2289 TW_Device_Extension *tw_dev;
2290 int retval = -ENODEV;
2291
2292 retval = pci_enable_device(pdev);
2293 if (retval) {
2294 printk(KERN_WARNING "3w-xxxx: Failed to enable pci device.");
2295 goto out_disable_device;
2296 }
2297
2298 pci_set_master(pdev);
2299
2300 retval = pci_set_dma_mask(pdev, TW_DMA_MASK);
2301 if (retval) {
2302 printk(KERN_WARNING "3w-xxxx: Failed to set dma mask.");
2303 goto out_disable_device;
2304 }
2305
2306 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2307 if (!host) {
2308 printk(KERN_WARNING "3w-xxxx: Failed to allocate memory for device extension.");
2309 retval = -ENOMEM;
2310 goto out_disable_device;
2311 }
2312 tw_dev = (TW_Device_Extension *)host->hostdata;
2313
2314 /* Save values to device extension */
2315 tw_dev->host = host;
2316 tw_dev->tw_pci_dev = pdev;
2317
2318 if (tw_initialize_device_extension(tw_dev)) {
2319 printk(KERN_WARNING "3w-xxxx: Failed to initialize device extension.");
2320 goto out_free_device_extension;
2321 }
2322
2323 /* Request IO regions */
2324 retval = pci_request_regions(pdev, "3w-xxxx");
2325 if (retval) {
2326 printk(KERN_WARNING "3w-xxxx: Failed to get mem region.");
2327 goto out_free_device_extension;
2328 }
2329
2330 /* Save base address */
2331 tw_dev->base_addr = pci_resource_start(pdev, 0);
2332 if (!tw_dev->base_addr) {
2333 printk(KERN_WARNING "3w-xxxx: Failed to get io address.");
2334 goto out_release_mem_region;
2335 }
2336
2337 /* Disable interrupts on the card */
2338 TW_DISABLE_INTERRUPTS(tw_dev);
2339
2340 /* Initialize the card */
2341 if (tw_reset_sequence(tw_dev))
2342 goto out_release_mem_region;
2343
2344 /* Set host specific parameters */
2345 host->max_id = TW_MAX_UNITS;
2346 host->max_cmd_len = TW_MAX_CDB_LEN;
2347
2348 /* Luns and channels aren't supported by adapter */
2349 host->max_lun = 0;
2350 host->max_channel = 0;
2351
2352 /* Register the card with the kernel SCSI layer */
2353 retval = scsi_add_host(host, &pdev->dev);
2354 if (retval) {
2355 printk(KERN_WARNING "3w-xxxx: scsi add host failed");
2356 goto out_release_mem_region;
2357 }
2358
2359 pci_set_drvdata(pdev, host);
2360
2361 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);
2362
2363 /* Now setup the interrupt handler */
2364 retval = request_irq(pdev->irq, tw_interrupt, IRQF_SHARED, "3w-xxxx", tw_dev);
2365 if (retval) {
2366 printk(KERN_WARNING "3w-xxxx: Error requesting IRQ.");
2367 goto out_remove_host;
2368 }
2369
2370 tw_device_extension_list[tw_device_extension_count] = tw_dev;
2371 tw_device_extension_count++;
2372
2373 /* Re-enable interrupts on the card */
2374 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2375
2376 /* Finally, scan the host */
2377 scsi_scan_host(host);
2378
2379 if (twe_major == -1) {
2380 if ((twe_major = register_chrdev (0, "twe", &tw_fops)) < 0)
2381 printk(KERN_WARNING "3w-xxxx: Failed to register character device.");
2382 }
2383 return 0;
2384
2385 out_remove_host:
2386 scsi_remove_host(host);
2387 out_release_mem_region:
2388 pci_release_regions(pdev);
2389 out_free_device_extension:
2390 tw_free_device_extension(tw_dev);
2391 scsi_host_put(host);
2392 out_disable_device:
2393 pci_disable_device(pdev);
2394
2395 return retval;
2396 } /* End tw_probe() */
2397
2398 /* This function is called to remove a device */
2399 static void tw_remove(struct pci_dev *pdev)
2400 {
2401 struct Scsi_Host *host = pci_get_drvdata(pdev);
2402 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2403
2404 scsi_remove_host(tw_dev->host);
2405
2406 /* Unregister character device */
2407 if (twe_major >= 0) {
2408 unregister_chrdev(twe_major, "twe");
2409 twe_major = -1;
2410 }
2411
2412 /* Shutdown the card */
2413 __tw_shutdown(tw_dev);
2414
2415 /* Free up the mem region */
2416 pci_release_regions(pdev);
2417
2418 /* Free up device extension resources */
2419 tw_free_device_extension(tw_dev);
2420
2421 scsi_host_put(tw_dev->host);
2422 pci_disable_device(pdev);
2423 tw_device_extension_count--;
2424 } /* End tw_remove() */
2425
2426 /* PCI Devices supported by this driver */
2427 static struct pci_device_id tw_pci_tbl[] = {
2428 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_1000,
2429 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2430 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_7000,
2431 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2432 { }
2433 };
2434 MODULE_DEVICE_TABLE(pci, tw_pci_tbl);
2435
2436 /* pci_driver initializer */
2437 static struct pci_driver tw_driver = {
2438 .name = "3w-xxxx",
2439 .id_table = tw_pci_tbl,
2440 .probe = tw_probe,
2441 .remove = tw_remove,
2442 .shutdown = tw_shutdown,
2443 };
2444
2445 /* This function is called on driver initialization */
2446 static int __init tw_init(void)
2447 {
2448 printk(KERN_WARNING "3ware Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2449
2450 return pci_register_driver(&tw_driver);
2451 } /* End tw_init() */
2452
2453 /* This function is called on driver exit */
2454 static void __exit tw_exit(void)
2455 {
2456 pci_unregister_driver(&tw_driver);
2457 } /* End tw_exit() */
2458
2459 module_init(tw_init);
2460 module_exit(tw_exit);
2461
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