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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"
224static DEFINE_MUTEX(tw_mutex);
225static TW_Device_Extension *tw_device_extension_list[TW_MAX_SLOT];
226static int tw_device_extension_count = 0;
227static int twe_major = -1;
228
229/* Module parameters */
230MODULE_AUTHOR("LSI");
231MODULE_DESCRIPTION("3ware Storage Controller Linux Driver");
232MODULE_LICENSE("GPL");
233MODULE_VERSION(TW_DRIVER_VERSION);
234
235/* Function prototypes */
236static 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 */
241static 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 */
256static 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 */
300static 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;
324out:
325 return retval;
326} /* End tw_poll_status() */
327
328/* This function will poll the status register for disappearance of a flag */
329static 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;
353out:
354 return retval;
355} /* End tw_poll_status_gone() */
356
357/* This function will attempt to post a command packet to the board */
358static 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 */
402static 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 */
447static 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 */
462static 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 */
475static 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 */
483static 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 */
491static 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 */
527static 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 */
540static 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 */
549static 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 */
555static 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 */
621static 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 */
685static 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 */
843static 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 */
885static 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;
1033out2:
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);
1036out:
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. */
1044static 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 */
1058static 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 */
1067static 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 */
1080static 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 */
1134static 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 */
1204static 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 */
1252static 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
1287static 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
1305static 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 */
1314static 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 */
1369static 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 */
1397static 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;
1420out:
1421 mutex_unlock(&tw_dev->ioctl_lock);
1422 return retval;
1423} /* End tw_scsi_eh_reset() */
1424
1425/* This function handles scsi inquiry commands */
1426static 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
1479static 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 */
1486static 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 */
1524static 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 */
1590static 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 */
1623static 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 */
1680static 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 */
1723static 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 */
1811static 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 */
1835static 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 */
1871static 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 */
1925static 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 */
1951static 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
2028static DEF_SCSI_QCMD(tw_scsi_queue)
2029
2030/* This function is the interrupt service routine */
2031static 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
2222tw_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 */
2228static 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 */
2250static 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 */
2259static 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
2267static 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 .no_write_same = 1,
2284};
2285
2286/* This function will probe and initialize a card */
2287static int tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
2288{
2289 struct Scsi_Host *host = NULL;
2290 TW_Device_Extension *tw_dev;
2291 int retval = -ENODEV;
2292
2293 retval = pci_enable_device(pdev);
2294 if (retval) {
2295 printk(KERN_WARNING "3w-xxxx: Failed to enable pci device.");
2296 goto out_disable_device;
2297 }
2298
2299 pci_set_master(pdev);
2300
2301 retval = pci_set_dma_mask(pdev, TW_DMA_MASK);
2302 if (retval) {
2303 printk(KERN_WARNING "3w-xxxx: Failed to set dma mask.");
2304 goto out_disable_device;
2305 }
2306
2307 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2308 if (!host) {
2309 printk(KERN_WARNING "3w-xxxx: Failed to allocate memory for device extension.");
2310 retval = -ENOMEM;
2311 goto out_disable_device;
2312 }
2313 tw_dev = (TW_Device_Extension *)host->hostdata;
2314
2315 /* Save values to device extension */
2316 tw_dev->host = host;
2317 tw_dev->tw_pci_dev = pdev;
2318
2319 if (tw_initialize_device_extension(tw_dev)) {
2320 printk(KERN_WARNING "3w-xxxx: Failed to initialize device extension.");
2321 goto out_free_device_extension;
2322 }
2323
2324 /* Request IO regions */
2325 retval = pci_request_regions(pdev, "3w-xxxx");
2326 if (retval) {
2327 printk(KERN_WARNING "3w-xxxx: Failed to get mem region.");
2328 goto out_free_device_extension;
2329 }
2330
2331 /* Save base address */
2332 tw_dev->base_addr = pci_resource_start(pdev, 0);
2333 if (!tw_dev->base_addr) {
2334 printk(KERN_WARNING "3w-xxxx: Failed to get io address.");
2335 goto out_release_mem_region;
2336 }
2337
2338 /* Disable interrupts on the card */
2339 TW_DISABLE_INTERRUPTS(tw_dev);
2340
2341 /* Initialize the card */
2342 if (tw_reset_sequence(tw_dev))
2343 goto out_release_mem_region;
2344
2345 /* Set host specific parameters */
2346 host->max_id = TW_MAX_UNITS;
2347 host->max_cmd_len = TW_MAX_CDB_LEN;
2348
2349 /* Luns and channels aren't supported by adapter */
2350 host->max_lun = 0;
2351 host->max_channel = 0;
2352
2353 /* Register the card with the kernel SCSI layer */
2354 retval = scsi_add_host(host, &pdev->dev);
2355 if (retval) {
2356 printk(KERN_WARNING "3w-xxxx: scsi add host failed");
2357 goto out_release_mem_region;
2358 }
2359
2360 pci_set_drvdata(pdev, host);
2361
2362 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);
2363
2364 /* Now setup the interrupt handler */
2365 retval = request_irq(pdev->irq, tw_interrupt, IRQF_SHARED, "3w-xxxx", tw_dev);
2366 if (retval) {
2367 printk(KERN_WARNING "3w-xxxx: Error requesting IRQ.");
2368 goto out_remove_host;
2369 }
2370
2371 tw_device_extension_list[tw_device_extension_count] = tw_dev;
2372 tw_device_extension_count++;
2373
2374 /* Re-enable interrupts on the card */
2375 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2376
2377 /* Finally, scan the host */
2378 scsi_scan_host(host);
2379
2380 if (twe_major == -1) {
2381 if ((twe_major = register_chrdev (0, "twe", &tw_fops)) < 0)
2382 printk(KERN_WARNING "3w-xxxx: Failed to register character device.");
2383 }
2384 return 0;
2385
2386out_remove_host:
2387 scsi_remove_host(host);
2388out_release_mem_region:
2389 pci_release_regions(pdev);
2390out_free_device_extension:
2391 tw_free_device_extension(tw_dev);
2392 scsi_host_put(host);
2393out_disable_device:
2394 pci_disable_device(pdev);
2395
2396 return retval;
2397} /* End tw_probe() */
2398
2399/* This function is called to remove a device */
2400static void tw_remove(struct pci_dev *pdev)
2401{
2402 struct Scsi_Host *host = pci_get_drvdata(pdev);
2403 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2404
2405 scsi_remove_host(tw_dev->host);
2406
2407 /* Unregister character device */
2408 if (twe_major >= 0) {
2409 unregister_chrdev(twe_major, "twe");
2410 twe_major = -1;
2411 }
2412
2413 /* Shutdown the card */
2414 __tw_shutdown(tw_dev);
2415
2416 /* Free up the mem region */
2417 pci_release_regions(pdev);
2418
2419 /* Free up device extension resources */
2420 tw_free_device_extension(tw_dev);
2421
2422 scsi_host_put(tw_dev->host);
2423 pci_disable_device(pdev);
2424 tw_device_extension_count--;
2425} /* End tw_remove() */
2426
2427/* PCI Devices supported by this driver */
2428static struct pci_device_id tw_pci_tbl[] = {
2429 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_1000,
2430 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2431 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_7000,
2432 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2433 { }
2434};
2435MODULE_DEVICE_TABLE(pci, tw_pci_tbl);
2436
2437/* pci_driver initializer */
2438static struct pci_driver tw_driver = {
2439 .name = "3w-xxxx",
2440 .id_table = tw_pci_tbl,
2441 .probe = tw_probe,
2442 .remove = tw_remove,
2443 .shutdown = tw_shutdown,
2444};
2445
2446/* This function is called on driver initialization */
2447static int __init tw_init(void)
2448{
2449 printk(KERN_WARNING "3ware Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2450
2451 return pci_register_driver(&tw_driver);
2452} /* End tw_init() */
2453
2454/* This function is called on driver exit */
2455static void __exit tw_exit(void)
2456{
2457 pci_unregister_driver(&tw_driver);
2458} /* End tw_exit() */
2459
2460module_init(tw_init);
2461module_exit(tw_exit);
2462
1/*
2 3w-xxxx.c -- 3ware Storage Controller device driver for Linux.
3
4 Written By: Adam Radford <aradford@gmail.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
51 aradford@gmail.com
52
53
54 History
55 -------
56 0.1.000 - Initial release.
57 0.4.000 - Added support for Asynchronous Event Notification through
58 ioctls for 3DM.
59 1.0.000 - Added DPO & FUA bit support for WRITE_10 & WRITE_6 cdb
60 to disable drive write-cache before writes.
61 1.1.000 - Fixed performance bug with DPO & FUA not existing for WRITE_6.
62 1.2.000 - Added support for clean shutdown notification/feature table.
63 1.02.00.001 - Added support for full command packet posts through ioctls
64 for 3DM.
65 Bug fix so hot spare drives don't show up.
66 1.02.00.002 - Fix bug with tw_setfeature() call that caused oops on some
67 systems.
68 08/21/00 - release previously allocated resources on failure at
69 tw_allocate_memory (acme)
70 1.02.00.003 - Fix tw_interrupt() to report error to scsi layer when
71 controller status is non-zero.
72 Added handling of request_sense opcode.
73 Fix possible null pointer dereference in
74 tw_reset_device_extension()
75 1.02.00.004 - Add support for device id of 3ware 7000 series controllers.
76 Make tw_setfeature() call with interrupts disabled.
77 Register interrupt handler before enabling interrupts.
78 Clear attention interrupt before draining aen queue.
79 1.02.00.005 - Allocate bounce buffers and custom queue depth for raid5 for
80 6000 and 5000 series controllers.
81 Reduce polling mdelays causing problems on some systems.
82 Fix use_sg = 1 calculation bug.
83 Check for scsi_register returning NULL.
84 Add aen count to /proc/scsi/3w-xxxx.
85 Remove aen code unit masking in tw_aen_complete().
86 1.02.00.006 - Remove unit from printk in tw_scsi_eh_abort(), causing
87 possible oops.
88 Fix possible null pointer dereference in tw_scsi_queue()
89 if done function pointer was invalid.
90 1.02.00.007 - Fix possible null pointer dereferences in tw_ioctl().
91 Remove check for invalid done function pointer from
92 tw_scsi_queue().
93 1.02.00.008 - Set max sectors per io to TW_MAX_SECTORS in tw_findcards().
94 Add tw_decode_error() for printing readable error messages.
95 Print some useful information on certain aen codes.
96 Add tw_decode_bits() for interpreting status register output.
97 Make scsi_set_pci_device() for kernels >= 2.4.4
98 Fix bug where aen's could be lost before a reset.
99 Re-add spinlocks in tw_scsi_detect().
100 Fix possible null pointer dereference in tw_aen_drain_queue()
101 during initialization.
102 Clear pci parity errors during initialization and during io.
103 1.02.00.009 - Remove redundant increment in tw_state_request_start().
104 Add ioctl support for direct ATA command passthru.
105 Add entire aen code string list.
106 1.02.00.010 - Cleanup queueing code, fix jbod thoughput.
107 Fix get_param for specific units.
108 1.02.00.011 - Fix bug in tw_aen_complete() where aen's could be lost.
109 Fix tw_aen_drain_queue() to display useful info at init.
110 Set tw_host->max_id for 12 port cards.
111 Add ioctl support for raw command packet post from userspace
112 with sglist fragments (parameter and io).
113 1.02.00.012 - Fix read capacity to under report by 1 sector to fix get
114 last sector ioctl.
115 1.02.00.013 - Fix bug where more AEN codes weren't coming out during
116 driver initialization.
117 Improved handling of PCI aborts.
118 1.02.00.014 - Fix bug in tw_findcards() where AEN code could be lost.
119 Increase timeout in tw_aen_drain_queue() to 30 seconds.
120 1.02.00.015 - Re-write raw command post with data ioctl method.
121 Remove raid5 bounce buffers for raid5 for 6XXX for kernel 2.5
122 Add tw_map/unmap_scsi_sg/single_data() for kernel 2.5
123 Replace io_request_lock with host_lock for kernel 2.5
124 Set max_cmd_len to 16 for 3dm for kernel 2.5
125 1.02.00.016 - Set host->max_sectors back up to 256.
126 1.02.00.017 - Modified pci parity error handling/clearing from config space
127 during initialization.
128 1.02.00.018 - Better handling of request sense opcode and sense information
129 for failed commands. Add tw_decode_sense().
130 Replace all mdelay()'s with scsi_sleep().
131 1.02.00.019 - Revert mdelay's and scsi_sleep's, this caused problems on
132 some SMP systems.
133 1.02.00.020 - Add pci_set_dma_mask(), rewrite kmalloc()/virt_to_bus() to
134 pci_alloc/free_consistent().
135 Better alignment checking in tw_allocate_memory().
136 Cleanup tw_initialize_device_extension().
137 1.02.00.021 - Bump cmd_per_lun in SHT to 255 for better jbod performance.
138 Improve handling of errors in tw_interrupt().
139 Add handling/clearing of controller queue error.
140 Empty stale responses before draining aen queue.
141 Fix tw_scsi_eh_abort() to not reset on every io abort.
142 Set can_queue in SHT to 255 to prevent hang from AEN.
143 1.02.00.022 - Fix possible null pointer dereference in tw_scsi_release().
144 1.02.00.023 - Fix bug in tw_aen_drain_queue() where unit # was always zero.
145 1.02.00.024 - Add severity levels to AEN strings.
146 1.02.00.025 - Fix command interrupt spurious error messages.
147 Fix bug in raw command post with data ioctl method.
148 Fix bug where rollcall sometimes failed with cable errors.
149 Print unit # on all command timeouts.
150 1.02.00.026 - Fix possible infinite retry bug with power glitch induced
151 drive timeouts.
152 Cleanup some AEN severity levels.
153 1.02.00.027 - Add drive not supported AEN code for SATA controllers.
154 Remove spurious unknown ioctl error message.
155 1.02.00.028 - Fix bug where multiple controllers with no units were the
156 same card number.
157 Fix bug where cards were being shut down more than once.
158 1.02.00.029 - Add missing pci_free_consistent() in tw_allocate_memory().
159 Replace pci_map_single() with pci_map_page() for highmem.
160 Check for tw_setfeature() failure.
161 1.02.00.030 - Make driver 64-bit clean.
162 1.02.00.031 - Cleanup polling timeouts/routines in several places.
163 Add support for mode sense opcode.
164 Add support for cache mode page.
165 Add support for synchronize cache opcode.
166 1.02.00.032 - Fix small multicard rollcall bug.
167 Make driver stay loaded with no units for hot add/swap.
168 Add support for "twe" character device for ioctls.
169 Clean up request_id queueing code.
170 Fix tw_scsi_queue() spinlocks.
171 1.02.00.033 - Fix tw_aen_complete() to not queue 'queue empty' AEN's.
172 Initialize queues correctly when loading with no valid units.
173 1.02.00.034 - Fix tw_decode_bits() to handle multiple errors.
174 Add support for user configurable cmd_per_lun.
175 Add support for sht->slave_configure().
176 1.02.00.035 - Improve tw_allocate_memory() memory allocation.
177 Fix tw_chrdev_ioctl() to sleep correctly.
178 1.02.00.036 - Increase character ioctl timeout to 60 seconds.
179 1.02.00.037 - Fix tw_ioctl() to handle all non-data ATA passthru cmds
180 for 'smartmontools' support.
181 1.26.00.038 - Roll driver minor version to 26 to denote kernel 2.6.
182 Add support for cmds_per_lun module parameter.
183 1.26.00.039 - Fix bug in tw_chrdev_ioctl() polling code.
184 Fix data_buffer_length usage in tw_chrdev_ioctl().
185 Update contact information.
186 1.26.02.000 - Convert driver to pci_driver format.
187 1.26.02.001 - Increase max ioctl buffer size to 512 sectors.
188 Make tw_scsi_queue() return 0 for 'Unknown scsi opcode'.
189 Fix tw_remove() to free irq handler/unregister_chrdev()
190 before shutting down card.
191 Change to new 'change_queue_depth' api.
192 Fix 'handled=1' ISR usage, remove bogus IRQ check.
193 1.26.02.002 - Free irq handler in __tw_shutdown().
194 Turn on RCD bit for caching mode page.
195 Serialize reset code.
196 1.26.02.003 - Force 60 second timeout default.
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/gfp.h>
208#include <linux/pci.h>
209#include <linux/time.h>
210#include <linux/mutex.h>
211#include <asm/io.h>
212#include <asm/irq.h>
213#include <linux/uaccess.h>
214#include <scsi/scsi.h>
215#include <scsi/scsi_host.h>
216#include <scsi/scsi_tcq.h>
217#include <scsi/scsi_cmnd.h>
218#include <scsi/scsi_eh.h>
219#include "3w-xxxx.h"
220
221/* Globals */
222#define TW_DRIVER_VERSION "1.26.02.003"
223static DEFINE_MUTEX(tw_mutex);
224static TW_Device_Extension *tw_device_extension_list[TW_MAX_SLOT];
225static int tw_device_extension_count = 0;
226static int twe_major = -1;
227
228/* Module parameters */
229MODULE_AUTHOR("LSI");
230MODULE_DESCRIPTION("3ware Storage Controller Linux Driver");
231MODULE_LICENSE("GPL");
232MODULE_VERSION(TW_DRIVER_VERSION);
233
234/* Function prototypes */
235static int tw_reset_device_extension(TW_Device_Extension *tw_dev);
236
237/* Functions */
238
239/* This function will check the status register for unexpected bits */
240static int tw_check_bits(u32 status_reg_value)
241{
242 if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS) {
243 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): No expected bits (0x%x).\n", status_reg_value);
244 return 1;
245 }
246 if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0) {
247 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): Found unexpected bits (0x%x).\n", status_reg_value);
248 return 1;
249 }
250
251 return 0;
252} /* End tw_check_bits() */
253
254/* This function will print readable messages from status register errors */
255static int tw_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value, int print_host)
256{
257 char host[16];
258
259 dprintk(KERN_WARNING "3w-xxxx: tw_decode_bits()\n");
260
261 if (print_host)
262 sprintf(host, " scsi%d:", tw_dev->host->host_no);
263 else
264 host[0] = '\0';
265
266 if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) {
267 printk(KERN_WARNING "3w-xxxx:%s PCI Parity Error: clearing.\n", host);
268 outl(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
269 }
270
271 if (status_reg_value & TW_STATUS_PCI_ABORT) {
272 printk(KERN_WARNING "3w-xxxx:%s PCI Abort: clearing.\n", host);
273 outl(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev));
274 pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT);
275 }
276
277 if (status_reg_value & TW_STATUS_QUEUE_ERROR) {
278 printk(KERN_WARNING "3w-xxxx:%s Controller Queue Error: clearing.\n", host);
279 outl(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
280 }
281
282 if (status_reg_value & TW_STATUS_SBUF_WRITE_ERROR) {
283 printk(KERN_WARNING "3w-xxxx:%s SBUF Write Error: clearing.\n", host);
284 outl(TW_CONTROL_CLEAR_SBUF_WRITE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
285 }
286
287 if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
288 if (tw_dev->reset_print == 0) {
289 printk(KERN_WARNING "3w-xxxx:%s Microcontroller Error: clearing.\n", host);
290 tw_dev->reset_print = 1;
291 }
292 return 1;
293 }
294
295 return 0;
296} /* End tw_decode_bits() */
297
298/* This function will poll the status register for a flag */
299static int tw_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds)
300{
301 u32 status_reg_value;
302 unsigned long before;
303 int retval = 1;
304
305 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
306 before = jiffies;
307
308 if (tw_check_bits(status_reg_value))
309 tw_decode_bits(tw_dev, status_reg_value, 0);
310
311 while ((status_reg_value & flag) != flag) {
312 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
313
314 if (tw_check_bits(status_reg_value))
315 tw_decode_bits(tw_dev, status_reg_value, 0);
316
317 if (time_after(jiffies, before + HZ * seconds))
318 goto out;
319
320 msleep(50);
321 }
322 retval = 0;
323out:
324 return retval;
325} /* End tw_poll_status() */
326
327/* This function will poll the status register for disappearance of a flag */
328static int tw_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds)
329{
330 u32 status_reg_value;
331 unsigned long before;
332 int retval = 1;
333
334 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
335 before = jiffies;
336
337 if (tw_check_bits(status_reg_value))
338 tw_decode_bits(tw_dev, status_reg_value, 0);
339
340 while ((status_reg_value & flag) != 0) {
341 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
342
343 if (tw_check_bits(status_reg_value))
344 tw_decode_bits(tw_dev, status_reg_value, 0);
345
346 if (time_after(jiffies, before + HZ * seconds))
347 goto out;
348
349 msleep(50);
350 }
351 retval = 0;
352out:
353 return retval;
354} /* End tw_poll_status_gone() */
355
356/* This function will attempt to post a command packet to the board */
357static int tw_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
358{
359 u32 status_reg_value;
360 unsigned long command_que_value;
361
362 dprintk(KERN_NOTICE "3w-xxxx: tw_post_command_packet()\n");
363 command_que_value = tw_dev->command_packet_physical_address[request_id];
364 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
365
366 if (tw_check_bits(status_reg_value)) {
367 dprintk(KERN_WARNING "3w-xxxx: tw_post_command_packet(): Unexpected bits.\n");
368 tw_decode_bits(tw_dev, status_reg_value, 1);
369 }
370
371 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
372 /* We successfully posted the command packet */
373 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
374 tw_dev->state[request_id] = TW_S_POSTED;
375 tw_dev->posted_request_count++;
376 if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) {
377 tw_dev->max_posted_request_count = tw_dev->posted_request_count;
378 }
379 } else {
380 /* Couldn't post the command packet, so we do it in the isr */
381 if (tw_dev->state[request_id] != TW_S_PENDING) {
382 tw_dev->state[request_id] = TW_S_PENDING;
383 tw_dev->pending_request_count++;
384 if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) {
385 tw_dev->max_pending_request_count = tw_dev->pending_request_count;
386 }
387 tw_dev->pending_queue[tw_dev->pending_tail] = request_id;
388 if (tw_dev->pending_tail == TW_Q_LENGTH-1) {
389 tw_dev->pending_tail = TW_Q_START;
390 } else {
391 tw_dev->pending_tail = tw_dev->pending_tail + 1;
392 }
393 }
394 TW_UNMASK_COMMAND_INTERRUPT(tw_dev);
395 return 1;
396 }
397 return 0;
398} /* End tw_post_command_packet() */
399
400/* This function will return valid sense buffer information for failed cmds */
401static int tw_decode_sense(TW_Device_Extension *tw_dev, int request_id, int fill_sense)
402{
403 int i;
404 TW_Command *command;
405
406 dprintk(KERN_WARNING "3w-xxxx: tw_decode_sense()\n");
407 command = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
408
409 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));
410
411 /* Attempt to return intelligent sense information */
412 if (fill_sense) {
413 if ((command->status == 0xc7) || (command->status == 0xcb)) {
414 for (i = 0; i < ARRAY_SIZE(tw_sense_table); i++) {
415 if (command->flags == tw_sense_table[i][0]) {
416
417 /* Valid bit and 'current errors' */
418 tw_dev->srb[request_id]->sense_buffer[0] = (0x1 << 7 | 0x70);
419
420 /* Sense key */
421 tw_dev->srb[request_id]->sense_buffer[2] = tw_sense_table[i][1];
422
423 /* Additional sense length */
424 tw_dev->srb[request_id]->sense_buffer[7] = 0xa; /* 10 bytes */
425
426 /* Additional sense code */
427 tw_dev->srb[request_id]->sense_buffer[12] = tw_sense_table[i][2];
428
429 /* Additional sense code qualifier */
430 tw_dev->srb[request_id]->sense_buffer[13] = tw_sense_table[i][3];
431
432 tw_dev->srb[request_id]->result = (DID_OK << 16) | SAM_STAT_CHECK_CONDITION;
433 return TW_ISR_DONT_RESULT; /* Special case for isr to not over-write result */
434 }
435 }
436 }
437
438 /* If no table match, error so we get a reset */
439 return 1;
440 }
441
442 return 0;
443} /* End tw_decode_sense() */
444
445/* This function will report controller error status */
446static int tw_check_errors(TW_Device_Extension *tw_dev)
447{
448 u32 status_reg_value;
449
450 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
451
452 if (TW_STATUS_ERRORS(status_reg_value) || tw_check_bits(status_reg_value)) {
453 tw_decode_bits(tw_dev, status_reg_value, 0);
454 return 1;
455 }
456
457 return 0;
458} /* End tw_check_errors() */
459
460/* This function will empty the response que */
461static void tw_empty_response_que(TW_Device_Extension *tw_dev)
462{
463 u32 status_reg_value;
464
465 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
466
467 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
468 inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
469 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
470 }
471} /* End tw_empty_response_que() */
472
473/* This function will free a request_id */
474static void tw_state_request_finish(TW_Device_Extension *tw_dev, int request_id)
475{
476 tw_dev->free_queue[tw_dev->free_tail] = request_id;
477 tw_dev->state[request_id] = TW_S_FINISHED;
478 tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
479} /* End tw_state_request_finish() */
480
481/* This function will assign an available request_id */
482static void tw_state_request_start(TW_Device_Extension *tw_dev, int *request_id)
483{
484 *request_id = tw_dev->free_queue[tw_dev->free_head];
485 tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
486 tw_dev->state[*request_id] = TW_S_STARTED;
487} /* End tw_state_request_start() */
488
489/* Show some statistics about the card */
490static ssize_t tw_show_stats(struct device *dev, struct device_attribute *attr,
491 char *buf)
492{
493 struct Scsi_Host *host = class_to_shost(dev);
494 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
495 unsigned long flags = 0;
496 ssize_t len;
497
498 spin_lock_irqsave(tw_dev->host->host_lock, flags);
499 len = sysfs_emit(buf, "3w-xxxx Driver version: %s\n"
500 "Current commands posted: %4d\n"
501 "Max commands posted: %4d\n"
502 "Current pending commands: %4d\n"
503 "Max pending commands: %4d\n"
504 "Last sgl length: %4d\n"
505 "Max sgl length: %4d\n"
506 "Last sector count: %4d\n"
507 "Max sector count: %4d\n"
508 "SCSI Host Resets: %4d\n"
509 "AEN's: %4d\n",
510 TW_DRIVER_VERSION,
511 tw_dev->posted_request_count,
512 tw_dev->max_posted_request_count,
513 tw_dev->pending_request_count,
514 tw_dev->max_pending_request_count,
515 tw_dev->sgl_entries,
516 tw_dev->max_sgl_entries,
517 tw_dev->sector_count,
518 tw_dev->max_sector_count,
519 tw_dev->num_resets,
520 tw_dev->aen_count);
521 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
522 return len;
523} /* End tw_show_stats() */
524
525/* Create sysfs 'stats' entry */
526static struct device_attribute tw_host_stats_attr = {
527 .attr = {
528 .name = "stats",
529 .mode = S_IRUGO,
530 },
531 .show = tw_show_stats
532};
533
534/* Host attributes initializer */
535static struct attribute *tw_host_attrs[] = {
536 &tw_host_stats_attr.attr,
537 NULL,
538};
539
540ATTRIBUTE_GROUPS(tw_host);
541
542/* This function will read the aen queue from the isr */
543static int tw_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
544{
545 TW_Command *command_packet;
546 TW_Param *param;
547 unsigned long command_que_value;
548 u32 status_reg_value;
549 unsigned long param_value = 0;
550
551 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_read_queue()\n");
552
553 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
554 if (tw_check_bits(status_reg_value)) {
555 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Unexpected bits.\n");
556 tw_decode_bits(tw_dev, status_reg_value, 1);
557 return 1;
558 }
559 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
560 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet virtual address.\n");
561 return 1;
562 }
563 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
564 memset(command_packet, 0, sizeof(TW_Sector));
565 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
566 command_packet->size = 4;
567 command_packet->request_id = request_id;
568 command_packet->status = 0;
569 command_packet->flags = 0;
570 command_packet->byte6.parameter_count = 1;
571 command_que_value = tw_dev->command_packet_physical_address[request_id];
572 if (command_que_value == 0) {
573 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet physical address.\n");
574 return 1;
575 }
576 /* Now setup the param */
577 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
578 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment virtual address.\n");
579 return 1;
580 }
581 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
582 memset(param, 0, sizeof(TW_Sector));
583 param->table_id = 0x401; /* AEN table */
584 param->parameter_id = 2; /* Unit code */
585 param->parameter_size_bytes = 2;
586 param_value = tw_dev->alignment_physical_address[request_id];
587 if (param_value == 0) {
588 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment physical address.\n");
589 return 1;
590 }
591 command_packet->byte8.param.sgl[0].address = param_value;
592 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
593
594 /* Now post the command packet */
595 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
596 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post succeeded.\n");
597 tw_dev->srb[request_id] = NULL; /* Flag internal command */
598 tw_dev->state[request_id] = TW_S_POSTED;
599 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
600 } else {
601 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post failed, will retry.\n");
602 return 1;
603 }
604
605 return 0;
606} /* End tw_aen_read_queue() */
607
608/* This function will complete an aen request from the isr */
609static int tw_aen_complete(TW_Device_Extension *tw_dev, int request_id)
610{
611 TW_Param *param;
612 unsigned short aen;
613 int error = 0, table_max = 0;
614
615 dprintk(KERN_WARNING "3w-xxxx: tw_aen_complete()\n");
616 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
617 printk(KERN_WARNING "3w-xxxx: tw_aen_complete(): Bad alignment virtual address.\n");
618 return 1;
619 }
620 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
621 aen = *(unsigned short *)(param->data);
622 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_complete(): Queue'd code 0x%x\n", aen);
623
624 /* Print some useful info when certain aen codes come out */
625 if (aen == 0x0ff) {
626 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: INFO: AEN queue overflow.\n", tw_dev->host->host_no);
627 } else {
628 table_max = ARRAY_SIZE(tw_aen_string);
629 if ((aen & 0x0ff) < table_max) {
630 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
631 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s%d.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff], aen >> 8);
632 } else {
633 if (aen != 0x0)
634 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff]);
635 }
636 } else {
637 printk(KERN_WARNING "3w-xxxx: scsi%d: Received AEN %d.\n", tw_dev->host->host_no, aen);
638 }
639 }
640 if (aen != TW_AEN_QUEUE_EMPTY) {
641 tw_dev->aen_count++;
642
643 /* Now queue the code */
644 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
645 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
646 tw_dev->aen_tail = TW_Q_START;
647 } else {
648 tw_dev->aen_tail = tw_dev->aen_tail + 1;
649 }
650 if (tw_dev->aen_head == tw_dev->aen_tail) {
651 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
652 tw_dev->aen_head = TW_Q_START;
653 } else {
654 tw_dev->aen_head = tw_dev->aen_head + 1;
655 }
656 }
657
658 error = tw_aen_read_queue(tw_dev, request_id);
659 if (error) {
660 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing AEN.\n", tw_dev->host->host_no);
661 tw_dev->state[request_id] = TW_S_COMPLETED;
662 tw_state_request_finish(tw_dev, request_id);
663 }
664 } else {
665 tw_dev->state[request_id] = TW_S_COMPLETED;
666 tw_state_request_finish(tw_dev, request_id);
667 }
668
669 return 0;
670} /* End tw_aen_complete() */
671
672/* This function will drain the aen queue after a soft reset */
673static int tw_aen_drain_queue(TW_Device_Extension *tw_dev)
674{
675 TW_Command *command_packet;
676 TW_Param *param;
677 int request_id = 0;
678 unsigned long command_que_value;
679 unsigned long param_value;
680 TW_Response_Queue response_queue;
681 unsigned short aen;
682 unsigned short aen_code;
683 int finished = 0;
684 int first_reset = 0;
685 int queue = 0;
686 int found = 0, table_max = 0;
687
688 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_drain_queue()\n");
689
690 if (tw_poll_status(tw_dev, TW_STATUS_ATTENTION_INTERRUPT | TW_STATUS_MICROCONTROLLER_READY, 30)) {
691 dprintk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): No attention interrupt for card %d.\n", tw_device_extension_count);
692 return 1;
693 }
694 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
695
696 /* Empty response queue */
697 tw_empty_response_que(tw_dev);
698
699 /* Initialize command packet */
700 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
701 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet virtual address.\n");
702 return 1;
703 }
704 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
705 memset(command_packet, 0, sizeof(TW_Sector));
706 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
707 command_packet->size = 4;
708 command_packet->request_id = request_id;
709 command_packet->status = 0;
710 command_packet->flags = 0;
711 command_packet->byte6.parameter_count = 1;
712 command_que_value = tw_dev->command_packet_physical_address[request_id];
713 if (command_que_value == 0) {
714 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet physical address.\n");
715 return 1;
716 }
717
718 /* Now setup the param */
719 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
720 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment virtual address.\n");
721 return 1;
722 }
723 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
724 memset(param, 0, sizeof(TW_Sector));
725 param->table_id = 0x401; /* AEN table */
726 param->parameter_id = 2; /* Unit code */
727 param->parameter_size_bytes = 2;
728 param_value = tw_dev->alignment_physical_address[request_id];
729 if (param_value == 0) {
730 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment physical address.\n");
731 return 1;
732 }
733 command_packet->byte8.param.sgl[0].address = param_value;
734 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
735
736 /* Now drain the controller's aen queue */
737 do {
738 /* Post command packet */
739 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
740
741 /* Now poll for completion */
742 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
743 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
744 request_id = TW_RESID_OUT(response_queue.response_id);
745
746 if (request_id != 0) {
747 /* Unexpected request id */
748 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Unexpected request id.\n");
749 return 1;
750 }
751
752 if (command_packet->status != 0) {
753 if (command_packet->flags != TW_AEN_TABLE_UNDEFINED) {
754 /* Bad response */
755 tw_decode_sense(tw_dev, request_id, 0);
756 return 1;
757 } else {
758 /* We know this is a 3w-1x00, and doesn't support aen's */
759 return 0;
760 }
761 }
762
763 /* Now check the aen */
764 aen = *(unsigned short *)(param->data);
765 aen_code = (aen & 0x0ff);
766 queue = 0;
767 switch (aen_code) {
768 case TW_AEN_QUEUE_EMPTY:
769 dprintk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
770 if (first_reset != 1) {
771 return 1;
772 } else {
773 finished = 1;
774 }
775 break;
776 case TW_AEN_SOFT_RESET:
777 if (first_reset == 0) {
778 first_reset = 1;
779 } else {
780 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
781 tw_dev->aen_count++;
782 queue = 1;
783 }
784 break;
785 default:
786 if (aen == 0x0ff) {
787 printk(KERN_WARNING "3w-xxxx: AEN: INFO: AEN queue overflow.\n");
788 } else {
789 table_max = ARRAY_SIZE(tw_aen_string);
790 if ((aen & 0x0ff) < table_max) {
791 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
792 printk(KERN_WARNING "3w-xxxx: AEN: %s%d.\n", tw_aen_string[aen & 0xff], aen >> 8);
793 } else {
794 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
795 }
796 } else
797 printk(KERN_WARNING "3w-xxxx: Received AEN %d.\n", aen);
798 }
799 tw_dev->aen_count++;
800 queue = 1;
801 }
802
803 /* Now put the aen on the aen_queue */
804 if (queue == 1) {
805 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
806 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
807 tw_dev->aen_tail = TW_Q_START;
808 } else {
809 tw_dev->aen_tail = tw_dev->aen_tail + 1;
810 }
811 if (tw_dev->aen_head == tw_dev->aen_tail) {
812 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
813 tw_dev->aen_head = TW_Q_START;
814 } else {
815 tw_dev->aen_head = tw_dev->aen_head + 1;
816 }
817 }
818 }
819 found = 1;
820 }
821 if (found == 0) {
822 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Response never received.\n");
823 return 1;
824 }
825 } while (finished == 0);
826
827 return 0;
828} /* End tw_aen_drain_queue() */
829
830/* This function will allocate memory */
831static int tw_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
832{
833 int i;
834 dma_addr_t dma_handle;
835 unsigned long *cpu_addr = NULL;
836
837 dprintk(KERN_NOTICE "3w-xxxx: tw_allocate_memory()\n");
838
839 cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev,
840 size * TW_Q_LENGTH, &dma_handle, GFP_KERNEL);
841 if (cpu_addr == NULL) {
842 printk(KERN_WARNING "3w-xxxx: dma_alloc_coherent() failed.\n");
843 return 1;
844 }
845
846 if ((unsigned long)cpu_addr % (tw_dev->tw_pci_dev->device == TW_DEVICE_ID ? TW_ALIGNMENT_6000 : TW_ALIGNMENT_7000)) {
847 printk(KERN_WARNING "3w-xxxx: Couldn't allocate correctly aligned memory.\n");
848 dma_free_coherent(&tw_dev->tw_pci_dev->dev, size * TW_Q_LENGTH,
849 cpu_addr, dma_handle);
850 return 1;
851 }
852
853 memset(cpu_addr, 0, size*TW_Q_LENGTH);
854
855 for (i=0;i<TW_Q_LENGTH;i++) {
856 switch(which) {
857 case 0:
858 tw_dev->command_packet_physical_address[i] = dma_handle+(i*size);
859 tw_dev->command_packet_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
860 break;
861 case 1:
862 tw_dev->alignment_physical_address[i] = dma_handle+(i*size);
863 tw_dev->alignment_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
864 break;
865 default:
866 printk(KERN_WARNING "3w-xxxx: tw_allocate_memory(): case slip in tw_allocate_memory()\n");
867 return 1;
868 }
869 }
870
871 return 0;
872} /* End tw_allocate_memory() */
873
874/* This function handles ioctl for the character device */
875static long tw_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
876{
877 int request_id;
878 dma_addr_t dma_handle;
879 unsigned short tw_aen_code;
880 unsigned long flags;
881 unsigned int data_buffer_length = 0;
882 unsigned long data_buffer_length_adjusted = 0;
883 struct inode *inode = file_inode(file);
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 mutex_lock(&tw_mutex);
895 /* Only let one of these through at a time */
896 if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
897 mutex_unlock(&tw_mutex);
898 return -EINTR;
899 }
900
901 /* First copy down the buffer length */
902 if (copy_from_user(&data_buffer_length, argp, sizeof(unsigned int)))
903 goto out;
904
905 /* Check size */
906 if (data_buffer_length > TW_MAX_IOCTL_SECTORS * 512) {
907 retval = -EINVAL;
908 goto out;
909 }
910
911 /* Hardware can only do multiple of 512 byte transfers */
912 data_buffer_length_adjusted = (data_buffer_length + 511) & ~511;
913
914 /* Now allocate ioctl buf memory */
915 cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted + sizeof(TW_New_Ioctl), &dma_handle, GFP_KERNEL);
916 if (cpu_addr == NULL) {
917 retval = -ENOMEM;
918 goto out;
919 }
920
921 tw_ioctl = (TW_New_Ioctl *)cpu_addr;
922
923 /* Now copy down the entire ioctl */
924 if (copy_from_user(tw_ioctl, argp, data_buffer_length + sizeof(TW_New_Ioctl)))
925 goto out2;
926
927 passthru = (TW_Passthru *)&tw_ioctl->firmware_command;
928
929 /* See which ioctl we are doing */
930 switch (cmd) {
931 case TW_OP_NOP:
932 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_OP_NOP.\n");
933 break;
934 case TW_OP_AEN_LISTEN:
935 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_AEN_LISTEN.\n");
936 memset(tw_ioctl->data_buffer, 0, data_buffer_length);
937
938 spin_lock_irqsave(tw_dev->host->host_lock, flags);
939 if (tw_dev->aen_head == tw_dev->aen_tail) {
940 tw_aen_code = TW_AEN_QUEUE_EMPTY;
941 } else {
942 tw_aen_code = tw_dev->aen_queue[tw_dev->aen_head];
943 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
944 tw_dev->aen_head = TW_Q_START;
945 } else {
946 tw_dev->aen_head = tw_dev->aen_head + 1;
947 }
948 }
949 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
950 memcpy(tw_ioctl->data_buffer, &tw_aen_code, sizeof(tw_aen_code));
951 break;
952 case TW_CMD_PACKET_WITH_DATA:
953 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_CMD_PACKET_WITH_DATA.\n");
954 spin_lock_irqsave(tw_dev->host->host_lock, flags);
955
956 tw_state_request_start(tw_dev, &request_id);
957
958 /* Flag internal command */
959 tw_dev->srb[request_id] = NULL;
960
961 /* Flag chrdev ioctl */
962 tw_dev->chrdev_request_id = request_id;
963
964 tw_ioctl->firmware_command.request_id = request_id;
965
966 /* Load the sg list */
967 switch (TW_SGL_OUT(tw_ioctl->firmware_command.opcode__sgloffset)) {
968 case 2:
969 tw_ioctl->firmware_command.byte8.param.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl);
970 tw_ioctl->firmware_command.byte8.param.sgl[0].length = data_buffer_length_adjusted;
971 break;
972 case 3:
973 tw_ioctl->firmware_command.byte8.io.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl);
974 tw_ioctl->firmware_command.byte8.io.sgl[0].length = data_buffer_length_adjusted;
975 break;
976 case 5:
977 passthru->sg_list[0].address = dma_handle + sizeof(TW_New_Ioctl);
978 passthru->sg_list[0].length = data_buffer_length_adjusted;
979 break;
980 }
981
982 memcpy(tw_dev->command_packet_virtual_address[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command));
983
984 /* Now post the command packet to the controller */
985 tw_post_command_packet(tw_dev, request_id);
986 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
987
988 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
989
990 /* Now wait for the command to complete */
991 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
992
993 /* We timed out, and didn't get an interrupt */
994 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
995 /* Now we need to reset the board */
996 printk(KERN_WARNING "3w-xxxx: scsi%d: Character ioctl (0x%x) timed out, resetting card.\n", tw_dev->host->host_no, cmd);
997 retval = -EIO;
998 if (tw_reset_device_extension(tw_dev)) {
999 printk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): Reset failed for card %d.\n", tw_dev->host->host_no);
1000 }
1001 goto out2;
1002 }
1003
1004 /* Now copy in the command packet response */
1005 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virtual_address[request_id], sizeof(TW_Command));
1006
1007 /* Now complete the io */
1008 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1009 tw_dev->posted_request_count--;
1010 tw_dev->state[request_id] = TW_S_COMPLETED;
1011 tw_state_request_finish(tw_dev, request_id);
1012 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1013 break;
1014 default:
1015 retval = -ENOTTY;
1016 goto out2;
1017 }
1018
1019 /* Now copy the response to userspace */
1020 if (copy_to_user(argp, tw_ioctl, sizeof(TW_New_Ioctl) + data_buffer_length))
1021 goto out2;
1022 retval = 0;
1023out2:
1024 /* Now free ioctl buf memory */
1025 dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted + sizeof(TW_New_Ioctl), cpu_addr, dma_handle);
1026out:
1027 mutex_unlock(&tw_dev->ioctl_lock);
1028 mutex_unlock(&tw_mutex);
1029 return retval;
1030} /* End tw_chrdev_ioctl() */
1031
1032/* This function handles open for the character device */
1033/* NOTE that this function races with remove. */
1034static int tw_chrdev_open(struct inode *inode, struct file *file)
1035{
1036 unsigned int minor_number;
1037
1038 dprintk(KERN_WARNING "3w-xxxx: tw_ioctl_open()\n");
1039
1040 if (!capable(CAP_SYS_ADMIN))
1041 return -EACCES;
1042
1043 minor_number = iminor(inode);
1044 if (minor_number >= tw_device_extension_count)
1045 return -ENODEV;
1046
1047 return 0;
1048} /* End tw_chrdev_open() */
1049
1050/* File operations struct for character device */
1051static const struct file_operations tw_fops = {
1052 .owner = THIS_MODULE,
1053 .unlocked_ioctl = tw_chrdev_ioctl,
1054 .compat_ioctl = compat_ptr_ioctl,
1055 .open = tw_chrdev_open,
1056 .release = NULL,
1057 .llseek = noop_llseek,
1058};
1059
1060/* This function will free up device extension resources */
1061static void tw_free_device_extension(TW_Device_Extension *tw_dev)
1062{
1063 dprintk(KERN_NOTICE "3w-xxxx: tw_free_device_extension()\n");
1064
1065 /* Free command packet and generic buffer memory */
1066 if (tw_dev->command_packet_virtual_address[0])
1067 dma_free_coherent(&tw_dev->tw_pci_dev->dev,
1068 sizeof(TW_Command) * TW_Q_LENGTH,
1069 tw_dev->command_packet_virtual_address[0],
1070 tw_dev->command_packet_physical_address[0]);
1071
1072 if (tw_dev->alignment_virtual_address[0])
1073 dma_free_coherent(&tw_dev->tw_pci_dev->dev,
1074 sizeof(TW_Sector) * TW_Q_LENGTH,
1075 tw_dev->alignment_virtual_address[0],
1076 tw_dev->alignment_physical_address[0]);
1077} /* End tw_free_device_extension() */
1078
1079/* This function will send an initconnection command to controller */
1080static 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 */
1134static 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 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 */
1204static 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 */
1252static int tw_initialize_device_extension(TW_Device_Extension *tw_dev)
1253{
1254 int i, error=0;
1255
1256 dprintk(KERN_NOTICE "3w-xxxx: tw_initialize_device_extension()\n");
1257
1258 /* Initialize command packet buffers */
1259 error = tw_allocate_memory(tw_dev, sizeof(TW_Command), 0);
1260 if (error) {
1261 printk(KERN_WARNING "3w-xxxx: Command packet memory allocation failed.\n");
1262 return 1;
1263 }
1264
1265 /* Initialize generic buffer */
1266 error = tw_allocate_memory(tw_dev, sizeof(TW_Sector), 1);
1267 if (error) {
1268 printk(KERN_WARNING "3w-xxxx: Generic memory allocation failed.\n");
1269 return 1;
1270 }
1271
1272 for (i=0;i<TW_Q_LENGTH;i++) {
1273 tw_dev->free_queue[i] = i;
1274 tw_dev->state[i] = TW_S_INITIAL;
1275 }
1276
1277 tw_dev->pending_head = TW_Q_START;
1278 tw_dev->pending_tail = TW_Q_START;
1279 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1280
1281 mutex_init(&tw_dev->ioctl_lock);
1282 init_waitqueue_head(&tw_dev->ioctl_wqueue);
1283
1284 return 0;
1285} /* End tw_initialize_device_extension() */
1286
1287/* This function will reset a device extension */
1288static int tw_reset_device_extension(TW_Device_Extension *tw_dev)
1289{
1290 int i = 0;
1291 struct scsi_cmnd *srb;
1292 unsigned long flags = 0;
1293
1294 dprintk(KERN_NOTICE "3w-xxxx: tw_reset_device_extension()\n");
1295
1296 set_bit(TW_IN_RESET, &tw_dev->flags);
1297 TW_DISABLE_INTERRUPTS(tw_dev);
1298 TW_MASK_COMMAND_INTERRUPT(tw_dev);
1299 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1300
1301 /* Abort all requests that are in progress */
1302 for (i=0;i<TW_Q_LENGTH;i++) {
1303 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1304 (tw_dev->state[i] != TW_S_INITIAL) &&
1305 (tw_dev->state[i] != TW_S_COMPLETED)) {
1306 srb = tw_dev->srb[i];
1307 if (srb != NULL) {
1308 srb->result = (DID_RESET << 16);
1309 scsi_dma_unmap(srb);
1310 scsi_done(srb);
1311 }
1312 }
1313 }
1314
1315 /* Reset queues and counts */
1316 for (i=0;i<TW_Q_LENGTH;i++) {
1317 tw_dev->free_queue[i] = i;
1318 tw_dev->state[i] = TW_S_INITIAL;
1319 }
1320 tw_dev->free_head = TW_Q_START;
1321 tw_dev->free_tail = TW_Q_START;
1322 tw_dev->posted_request_count = 0;
1323 tw_dev->pending_request_count = 0;
1324 tw_dev->pending_head = TW_Q_START;
1325 tw_dev->pending_tail = TW_Q_START;
1326 tw_dev->reset_print = 0;
1327
1328 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1329
1330 if (tw_reset_sequence(tw_dev)) {
1331 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset sequence failed.\n", tw_dev->host->host_no);
1332 return 1;
1333 }
1334
1335 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
1336 clear_bit(TW_IN_RESET, &tw_dev->flags);
1337 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1338
1339 return 0;
1340} /* End tw_reset_device_extension() */
1341
1342/* This funciton returns unit geometry in cylinders/heads/sectors */
1343static int tw_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev,
1344 sector_t capacity, int geom[])
1345{
1346 int heads, sectors, cylinders;
1347
1348 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam()\n");
1349
1350 heads = 64;
1351 sectors = 32;
1352 cylinders = sector_div(capacity, heads * sectors);
1353
1354 if (capacity >= 0x200000) {
1355 heads = 255;
1356 sectors = 63;
1357 cylinders = sector_div(capacity, heads * sectors);
1358 }
1359
1360 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam(): heads = %d, sectors = %d, cylinders = %d\n", heads, sectors, cylinders);
1361 geom[0] = heads;
1362 geom[1] = sectors;
1363 geom[2] = cylinders;
1364
1365 return 0;
1366} /* End tw_scsi_biosparam() */
1367
1368/* This is the new scsi eh reset function */
1369static int tw_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1370{
1371 TW_Device_Extension *tw_dev=NULL;
1372 int retval = FAILED;
1373
1374 tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1375
1376 tw_dev->num_resets++;
1377
1378 sdev_printk(KERN_WARNING, SCpnt->device,
1379 "WARNING: Command (0x%x) timed out, resetting card.\n",
1380 SCpnt->cmnd[0]);
1381
1382 /* Make sure we are not issuing an ioctl or resetting from ioctl */
1383 mutex_lock(&tw_dev->ioctl_lock);
1384
1385 /* Now reset the card and some of the device extension data */
1386 if (tw_reset_device_extension(tw_dev)) {
1387 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset failed.\n", tw_dev->host->host_no);
1388 goto out;
1389 }
1390
1391 retval = SUCCESS;
1392out:
1393 mutex_unlock(&tw_dev->ioctl_lock);
1394 return retval;
1395} /* End tw_scsi_eh_reset() */
1396
1397/* This function handles scsi inquiry commands */
1398static int tw_scsiop_inquiry(TW_Device_Extension *tw_dev, int request_id)
1399{
1400 TW_Param *param;
1401 TW_Command *command_packet;
1402 unsigned long command_que_value;
1403 unsigned long param_value;
1404
1405 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry()\n");
1406
1407 /* Initialize command packet */
1408 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1409 if (command_packet == NULL) {
1410 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet virtual address.\n");
1411 return 1;
1412 }
1413 memset(command_packet, 0, sizeof(TW_Sector));
1414 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1415 command_packet->size = 4;
1416 command_packet->request_id = request_id;
1417 command_packet->status = 0;
1418 command_packet->flags = 0;
1419 command_packet->byte6.parameter_count = 1;
1420
1421 /* Now setup the param */
1422 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1423 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment virtual address.\n");
1424 return 1;
1425 }
1426 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1427 memset(param, 0, sizeof(TW_Sector));
1428 param->table_id = 3; /* unit summary table */
1429 param->parameter_id = 3; /* unitsstatus parameter */
1430 param->parameter_size_bytes = TW_MAX_UNITS;
1431 param_value = tw_dev->alignment_physical_address[request_id];
1432 if (param_value == 0) {
1433 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment physical address.\n");
1434 return 1;
1435 }
1436
1437 command_packet->byte8.param.sgl[0].address = param_value;
1438 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1439 command_que_value = tw_dev->command_packet_physical_address[request_id];
1440 if (command_que_value == 0) {
1441 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet physical address.\n");
1442 return 1;
1443 }
1444
1445 /* Now try to post the command packet */
1446 tw_post_command_packet(tw_dev, request_id);
1447
1448 return 0;
1449} /* End tw_scsiop_inquiry() */
1450
1451static void tw_transfer_internal(TW_Device_Extension *tw_dev, int request_id,
1452 void *data, unsigned int len)
1453{
1454 scsi_sg_copy_from_buffer(tw_dev->srb[request_id], data, len);
1455}
1456
1457/* This function is called by the isr to complete an inquiry command */
1458static int tw_scsiop_inquiry_complete(TW_Device_Extension *tw_dev, int request_id)
1459{
1460 unsigned char *is_unit_present;
1461 unsigned char request_buffer[36];
1462 TW_Param *param;
1463
1464 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry_complete()\n");
1465
1466 memset(request_buffer, 0, sizeof(request_buffer));
1467 request_buffer[0] = TYPE_DISK; /* Peripheral device type */
1468 request_buffer[1] = 0; /* Device type modifier */
1469 request_buffer[2] = 0; /* No ansi/iso compliance */
1470 request_buffer[4] = 31; /* Additional length */
1471 memcpy(&request_buffer[8], "3ware ", 8); /* Vendor ID */
1472 sprintf(&request_buffer[16], "Logical Disk %-2d ", tw_dev->srb[request_id]->device->id);
1473 memcpy(&request_buffer[32], TW_DRIVER_VERSION, 3);
1474 tw_transfer_internal(tw_dev, request_id, request_buffer,
1475 sizeof(request_buffer));
1476
1477 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1478 if (param == NULL) {
1479 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry_complete(): Bad alignment virtual address.\n");
1480 return 1;
1481 }
1482 is_unit_present = &(param->data[0]);
1483
1484 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1485 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1486 } else {
1487 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1488 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1489 return TW_ISR_DONT_RESULT;
1490 }
1491
1492 return 0;
1493} /* End tw_scsiop_inquiry_complete() */
1494
1495/* This function handles scsi mode_sense commands */
1496static int tw_scsiop_mode_sense(TW_Device_Extension *tw_dev, int request_id)
1497{
1498 TW_Param *param;
1499 TW_Command *command_packet;
1500 unsigned long command_que_value;
1501 unsigned long param_value;
1502
1503 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense()\n");
1504
1505 /* Only page control = 0, page code = 0x8 (cache page) supported */
1506 if (tw_dev->srb[request_id]->cmnd[2] != 0x8) {
1507 tw_dev->state[request_id] = TW_S_COMPLETED;
1508 tw_state_request_finish(tw_dev, request_id);
1509 tw_dev->srb[request_id]->result = (DID_OK << 16);
1510 scsi_done(tw_dev->srb[request_id]);
1511 return 0;
1512 }
1513
1514 /* Now read firmware cache setting for this unit */
1515 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1516 if (command_packet == NULL) {
1517 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet virtual address.\n");
1518 return 1;
1519 }
1520
1521 /* Setup the command packet */
1522 memset(command_packet, 0, sizeof(TW_Sector));
1523 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1524 command_packet->size = 4;
1525 command_packet->request_id = request_id;
1526 command_packet->status = 0;
1527 command_packet->flags = 0;
1528 command_packet->byte6.parameter_count = 1;
1529
1530 /* Setup the param */
1531 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1532 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment virtual address.\n");
1533 return 1;
1534 }
1535
1536 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1537 memset(param, 0, sizeof(TW_Sector));
1538 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE + tw_dev->srb[request_id]->device->id;
1539 param->parameter_id = 7; /* unit flags */
1540 param->parameter_size_bytes = 1;
1541 param_value = tw_dev->alignment_physical_address[request_id];
1542 if (param_value == 0) {
1543 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment physical address.\n");
1544 return 1;
1545 }
1546
1547 command_packet->byte8.param.sgl[0].address = param_value;
1548 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1549 command_que_value = tw_dev->command_packet_physical_address[request_id];
1550 if (command_que_value == 0) {
1551 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet physical address.\n");
1552 return 1;
1553 }
1554
1555 /* Now try to post the command packet */
1556 tw_post_command_packet(tw_dev, request_id);
1557
1558 return 0;
1559} /* End tw_scsiop_mode_sense() */
1560
1561/* This function is called by the isr to complete a mode sense command */
1562static int tw_scsiop_mode_sense_complete(TW_Device_Extension *tw_dev, int request_id)
1563{
1564 TW_Param *param;
1565 unsigned char *flags;
1566 unsigned char request_buffer[8];
1567
1568 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense_complete()\n");
1569
1570 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1571 if (param == NULL) {
1572 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense_complete(): Bad alignment virtual address.\n");
1573 return 1;
1574 }
1575 flags = (char *)&(param->data[0]);
1576 memset(request_buffer, 0, sizeof(request_buffer));
1577
1578 request_buffer[0] = 0xf; /* mode data length */
1579 request_buffer[1] = 0; /* default medium type */
1580 request_buffer[2] = 0x10; /* dpo/fua support on */
1581 request_buffer[3] = 0; /* no block descriptors */
1582 request_buffer[4] = 0x8; /* caching page */
1583 request_buffer[5] = 0xa; /* page length */
1584 if (*flags & 0x1)
1585 request_buffer[6] = 0x5; /* WCE on, RCD on */
1586 else
1587 request_buffer[6] = 0x1; /* WCE off, RCD on */
1588 tw_transfer_internal(tw_dev, request_id, request_buffer,
1589 sizeof(request_buffer));
1590
1591 return 0;
1592} /* End tw_scsiop_mode_sense_complete() */
1593
1594/* This function handles scsi read_capacity commands */
1595static int tw_scsiop_read_capacity(TW_Device_Extension *tw_dev, int request_id)
1596{
1597 TW_Param *param;
1598 TW_Command *command_packet;
1599 unsigned long command_que_value;
1600 unsigned long param_value;
1601
1602 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity()\n");
1603
1604 /* Initialize command packet */
1605 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1606
1607 if (command_packet == NULL) {
1608 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet virtual address.\n");
1609 return 1;
1610 }
1611 memset(command_packet, 0, sizeof(TW_Sector));
1612 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1613 command_packet->size = 4;
1614 command_packet->request_id = request_id;
1615 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1616 command_packet->status = 0;
1617 command_packet->flags = 0;
1618 command_packet->byte6.block_count = 1;
1619
1620 /* Now setup the param */
1621 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1622 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment virtual address.\n");
1623 return 1;
1624 }
1625 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1626 memset(param, 0, sizeof(TW_Sector));
1627 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE +
1628 tw_dev->srb[request_id]->device->id;
1629 param->parameter_id = 4; /* unitcapacity parameter */
1630 param->parameter_size_bytes = 4;
1631 param_value = tw_dev->alignment_physical_address[request_id];
1632 if (param_value == 0) {
1633 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment physical address.\n");
1634 return 1;
1635 }
1636
1637 command_packet->byte8.param.sgl[0].address = param_value;
1638 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1639 command_que_value = tw_dev->command_packet_physical_address[request_id];
1640 if (command_que_value == 0) {
1641 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet physical address.\n");
1642 return 1;
1643 }
1644
1645 /* Now try to post the command to the board */
1646 tw_post_command_packet(tw_dev, request_id);
1647
1648 return 0;
1649} /* End tw_scsiop_read_capacity() */
1650
1651/* This function is called by the isr to complete a readcapacity command */
1652static int tw_scsiop_read_capacity_complete(TW_Device_Extension *tw_dev, int request_id)
1653{
1654 unsigned char *param_data;
1655 u32 capacity;
1656 char buff[8];
1657 TW_Param *param;
1658
1659 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete()\n");
1660
1661 memset(buff, 0, sizeof(buff));
1662 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1663 if (param == NULL) {
1664 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_capacity_complete(): Bad alignment virtual address.\n");
1665 return 1;
1666 }
1667 param_data = &(param->data[0]);
1668
1669 capacity = (param_data[3] << 24) | (param_data[2] << 16) |
1670 (param_data[1] << 8) | param_data[0];
1671
1672 /* Subtract one sector to fix get last sector ioctl */
1673 capacity -= 1;
1674
1675 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete(): Capacity = 0x%x.\n", capacity);
1676
1677 /* Number of LBA's */
1678 buff[0] = (capacity >> 24);
1679 buff[1] = (capacity >> 16) & 0xff;
1680 buff[2] = (capacity >> 8) & 0xff;
1681 buff[3] = capacity & 0xff;
1682
1683 /* Block size in bytes (512) */
1684 buff[4] = (TW_BLOCK_SIZE >> 24);
1685 buff[5] = (TW_BLOCK_SIZE >> 16) & 0xff;
1686 buff[6] = (TW_BLOCK_SIZE >> 8) & 0xff;
1687 buff[7] = TW_BLOCK_SIZE & 0xff;
1688
1689 tw_transfer_internal(tw_dev, request_id, buff, sizeof(buff));
1690
1691 return 0;
1692} /* End tw_scsiop_read_capacity_complete() */
1693
1694/* This function handles scsi read or write commands */
1695static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id)
1696{
1697 TW_Command *command_packet;
1698 unsigned long command_que_value;
1699 u32 lba = 0x0, num_sectors = 0x0;
1700 int i, use_sg;
1701 struct scsi_cmnd *srb;
1702 struct scatterlist *sglist, *sg;
1703
1704 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write()\n");
1705
1706 srb = tw_dev->srb[request_id];
1707
1708 sglist = scsi_sglist(srb);
1709 if (!sglist) {
1710 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Request buffer NULL.\n");
1711 return 1;
1712 }
1713
1714 /* Initialize command packet */
1715 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1716 if (command_packet == NULL) {
1717 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): Bad command packet virtual address.\n");
1718 return 1;
1719 }
1720
1721 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == READ_10) {
1722 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_READ);
1723 } else {
1724 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_WRITE);
1725 }
1726
1727 command_packet->size = 3;
1728 command_packet->request_id = request_id;
1729 command_packet->unit__hostid = TW_UNITHOST_IN(0, srb->device->id);
1730 command_packet->status = 0;
1731 command_packet->flags = 0;
1732
1733 if (srb->cmnd[0] == WRITE_10) {
1734 if ((srb->cmnd[1] & 0x8) || (srb->cmnd[1] & 0x10))
1735 command_packet->flags = 1;
1736 }
1737
1738 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6) {
1739 lba = ((u32)srb->cmnd[1] << 16) | ((u32)srb->cmnd[2] << 8) | (u32)srb->cmnd[3];
1740 num_sectors = (u32)srb->cmnd[4];
1741 } else {
1742 lba = ((u32)srb->cmnd[2] << 24) | ((u32)srb->cmnd[3] << 16) | ((u32)srb->cmnd[4] << 8) | (u32)srb->cmnd[5];
1743 num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
1744 }
1745
1746 /* Update sector statistic */
1747 tw_dev->sector_count = num_sectors;
1748 if (tw_dev->sector_count > tw_dev->max_sector_count)
1749 tw_dev->max_sector_count = tw_dev->sector_count;
1750
1751 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): lba = 0x%x num_sectors = 0x%x\n", lba, num_sectors);
1752 command_packet->byte8.io.lba = lba;
1753 command_packet->byte6.block_count = num_sectors;
1754
1755 use_sg = scsi_dma_map(srb);
1756 if (use_sg <= 0)
1757 return 1;
1758
1759 scsi_for_each_sg(tw_dev->srb[request_id], sg, use_sg, i) {
1760 command_packet->byte8.io.sgl[i].address = sg_dma_address(sg);
1761 command_packet->byte8.io.sgl[i].length = sg_dma_len(sg);
1762 command_packet->size+=2;
1763 }
1764
1765 /* Update SG statistics */
1766 tw_dev->sgl_entries = scsi_sg_count(tw_dev->srb[request_id]);
1767 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
1768 tw_dev->max_sgl_entries = tw_dev->sgl_entries;
1769
1770 command_que_value = tw_dev->command_packet_physical_address[request_id];
1771 if (command_que_value == 0) {
1772 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Bad command packet physical address.\n");
1773 return 1;
1774 }
1775
1776 /* Now try to post the command to the board */
1777 tw_post_command_packet(tw_dev, request_id);
1778
1779 return 0;
1780} /* End tw_scsiop_read_write() */
1781
1782/* This function will handle the request sense scsi command */
1783static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id)
1784{
1785 char request_buffer[18];
1786
1787 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n");
1788
1789 memset(request_buffer, 0, sizeof(request_buffer));
1790 request_buffer[0] = 0x70; /* Immediate fixed format */
1791 request_buffer[7] = 10; /* minimum size per SPC: 18 bytes */
1792 /* leave all other fields zero, giving effectively NO_SENSE return */
1793 tw_transfer_internal(tw_dev, request_id, request_buffer,
1794 sizeof(request_buffer));
1795
1796 tw_dev->state[request_id] = TW_S_COMPLETED;
1797 tw_state_request_finish(tw_dev, request_id);
1798
1799 /* If we got a request_sense, we probably want a reset, return error */
1800 tw_dev->srb[request_id]->result = (DID_ERROR << 16);
1801 scsi_done(tw_dev->srb[request_id]);
1802
1803 return 0;
1804} /* End tw_scsiop_request_sense() */
1805
1806/* This function will handle synchronize cache scsi command */
1807static int tw_scsiop_synchronize_cache(TW_Device_Extension *tw_dev, int request_id)
1808{
1809 TW_Command *command_packet;
1810 unsigned long command_que_value;
1811
1812 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_synchronize_cache()\n");
1813
1814 /* Send firmware flush command for this unit */
1815 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1816 if (command_packet == NULL) {
1817 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet virtual address.\n");
1818 return 1;
1819 }
1820
1821 /* Setup the command packet */
1822 memset(command_packet, 0, sizeof(TW_Sector));
1823 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_FLUSH_CACHE);
1824 command_packet->size = 2;
1825 command_packet->request_id = request_id;
1826 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1827 command_packet->status = 0;
1828 command_packet->flags = 0;
1829 command_packet->byte6.parameter_count = 1;
1830 command_que_value = tw_dev->command_packet_physical_address[request_id];
1831 if (command_que_value == 0) {
1832 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet physical address.\n");
1833 return 1;
1834 }
1835
1836 /* Now try to post the command packet */
1837 tw_post_command_packet(tw_dev, request_id);
1838
1839 return 0;
1840} /* End tw_scsiop_synchronize_cache() */
1841
1842/* This function will handle test unit ready scsi command */
1843static int tw_scsiop_test_unit_ready(TW_Device_Extension *tw_dev, int request_id)
1844{
1845 TW_Param *param;
1846 TW_Command *command_packet;
1847 unsigned long command_que_value;
1848 unsigned long param_value;
1849
1850 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_test_unit_ready()\n");
1851
1852 /* Initialize command packet */
1853 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1854 if (command_packet == NULL) {
1855 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet virtual address.\n");
1856 return 1;
1857 }
1858 memset(command_packet, 0, sizeof(TW_Sector));
1859 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1860 command_packet->size = 4;
1861 command_packet->request_id = request_id;
1862 command_packet->status = 0;
1863 command_packet->flags = 0;
1864 command_packet->byte6.parameter_count = 1;
1865
1866 /* Now setup the param */
1867 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1868 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment virtual address.\n");
1869 return 1;
1870 }
1871 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1872 memset(param, 0, sizeof(TW_Sector));
1873 param->table_id = 3; /* unit summary table */
1874 param->parameter_id = 3; /* unitsstatus parameter */
1875 param->parameter_size_bytes = TW_MAX_UNITS;
1876 param_value = tw_dev->alignment_physical_address[request_id];
1877 if (param_value == 0) {
1878 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment physical address.\n");
1879 return 1;
1880 }
1881
1882 command_packet->byte8.param.sgl[0].address = param_value;
1883 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1884 command_que_value = tw_dev->command_packet_physical_address[request_id];
1885 if (command_que_value == 0) {
1886 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet physical address.\n");
1887 return 1;
1888 }
1889
1890 /* Now try to post the command packet */
1891 tw_post_command_packet(tw_dev, request_id);
1892
1893 return 0;
1894} /* End tw_scsiop_test_unit_ready() */
1895
1896/* This function is called by the isr to complete a testunitready command */
1897static int tw_scsiop_test_unit_ready_complete(TW_Device_Extension *tw_dev, int request_id)
1898{
1899 unsigned char *is_unit_present;
1900 TW_Param *param;
1901
1902 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete()\n");
1903
1904 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1905 if (param == NULL) {
1906 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete(): Bad alignment virtual address.\n");
1907 return 1;
1908 }
1909 is_unit_present = &(param->data[0]);
1910
1911 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1912 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1913 } else {
1914 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1915 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1916 return TW_ISR_DONT_RESULT;
1917 }
1918
1919 return 0;
1920} /* End tw_scsiop_test_unit_ready_complete() */
1921
1922/* This is the main scsi queue function to handle scsi opcodes */
1923static int tw_scsi_queue_lck(struct scsi_cmnd *SCpnt)
1924{
1925 void (*done)(struct scsi_cmnd *) = scsi_done;
1926 unsigned char *command = SCpnt->cmnd;
1927 int request_id = 0;
1928 int retval = 1;
1929 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1930
1931 /* If we are resetting due to timed out ioctl, report as busy */
1932 if (test_bit(TW_IN_RESET, &tw_dev->flags))
1933 return SCSI_MLQUEUE_HOST_BUSY;
1934
1935 /* Queue the command and get a request id */
1936 tw_state_request_start(tw_dev, &request_id);
1937
1938 /* Save the scsi command for use by the ISR */
1939 tw_dev->srb[request_id] = SCpnt;
1940
1941 switch (*command) {
1942 case READ_10:
1943 case READ_6:
1944 case WRITE_10:
1945 case WRITE_6:
1946 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ/WRITE.\n");
1947 retval = tw_scsiop_read_write(tw_dev, request_id);
1948 break;
1949 case TEST_UNIT_READY:
1950 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught TEST_UNIT_READY.\n");
1951 retval = tw_scsiop_test_unit_ready(tw_dev, request_id);
1952 break;
1953 case INQUIRY:
1954 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught INQUIRY.\n");
1955 retval = tw_scsiop_inquiry(tw_dev, request_id);
1956 break;
1957 case READ_CAPACITY:
1958 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ_CAPACITY.\n");
1959 retval = tw_scsiop_read_capacity(tw_dev, request_id);
1960 break;
1961 case REQUEST_SENSE:
1962 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught REQUEST_SENSE.\n");
1963 retval = tw_scsiop_request_sense(tw_dev, request_id);
1964 break;
1965 case MODE_SENSE:
1966 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught MODE_SENSE.\n");
1967 retval = tw_scsiop_mode_sense(tw_dev, request_id);
1968 break;
1969 case SYNCHRONIZE_CACHE:
1970 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught SYNCHRONIZE_CACHE.\n");
1971 retval = tw_scsiop_synchronize_cache(tw_dev, request_id);
1972 break;
1973 case TW_IOCTL:
1974 printk(KERN_WARNING "3w-xxxx: SCSI_IOCTL_SEND_COMMAND deprecated, please update your 3ware tools.\n");
1975 break;
1976 default:
1977 printk(KERN_NOTICE "3w-xxxx: scsi%d: Unknown scsi opcode: 0x%x\n", tw_dev->host->host_no, *command);
1978 tw_dev->state[request_id] = TW_S_COMPLETED;
1979 tw_state_request_finish(tw_dev, request_id);
1980 scsi_build_sense(SCpnt, 1, ILLEGAL_REQUEST, 0x20, 0);
1981 done(SCpnt);
1982 retval = 0;
1983 }
1984 if (retval) {
1985 tw_dev->state[request_id] = TW_S_COMPLETED;
1986 tw_state_request_finish(tw_dev, request_id);
1987 SCpnt->result = (DID_ERROR << 16);
1988 done(SCpnt);
1989 retval = 0;
1990 }
1991 return retval;
1992} /* End tw_scsi_queue() */
1993
1994static DEF_SCSI_QCMD(tw_scsi_queue)
1995
1996/* This function is the interrupt service routine */
1997static irqreturn_t tw_interrupt(int irq, void *dev_instance)
1998{
1999 int request_id;
2000 u32 status_reg_value;
2001 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
2002 TW_Response_Queue response_que;
2003 int error = 0, retval = 0;
2004 TW_Command *command_packet;
2005 int handled = 0;
2006
2007 /* Get the host lock for io completions */
2008 spin_lock(tw_dev->host->host_lock);
2009
2010 /* Read the registers */
2011 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2012
2013 /* Check if this is our interrupt, otherwise bail */
2014 if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
2015 goto tw_interrupt_bail;
2016
2017 handled = 1;
2018
2019 /* If we are resetting, bail */
2020 if (test_bit(TW_IN_RESET, &tw_dev->flags))
2021 goto tw_interrupt_bail;
2022
2023 /* Check controller for errors */
2024 if (tw_check_bits(status_reg_value)) {
2025 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2026 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2027 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2028 goto tw_interrupt_bail;
2029 }
2030 }
2031
2032 /* Handle host interrupt */
2033 if (status_reg_value & TW_STATUS_HOST_INTERRUPT) {
2034 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received host interrupt.\n");
2035 TW_CLEAR_HOST_INTERRUPT(tw_dev);
2036 }
2037
2038 /* Handle attention interrupt */
2039 if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
2040 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received attention interrupt.\n");
2041 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
2042 tw_state_request_start(tw_dev, &request_id);
2043 error = tw_aen_read_queue(tw_dev, request_id);
2044 if (error) {
2045 printk(KERN_WARNING "3w-xxxx: scsi%d: Error reading aen queue.\n", tw_dev->host->host_no);
2046 tw_dev->state[request_id] = TW_S_COMPLETED;
2047 tw_state_request_finish(tw_dev, request_id);
2048 }
2049 }
2050
2051 /* Handle command interrupt */
2052 if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
2053 /* Drain as many pending commands as we can */
2054 while (tw_dev->pending_request_count > 0) {
2055 request_id = tw_dev->pending_queue[tw_dev->pending_head];
2056 if (tw_dev->state[request_id] != TW_S_PENDING) {
2057 printk(KERN_WARNING "3w-xxxx: scsi%d: Found request id that wasn't pending.\n", tw_dev->host->host_no);
2058 break;
2059 }
2060 if (tw_post_command_packet(tw_dev, request_id)==0) {
2061 if (tw_dev->pending_head == TW_Q_LENGTH-1) {
2062 tw_dev->pending_head = TW_Q_START;
2063 } else {
2064 tw_dev->pending_head = tw_dev->pending_head + 1;
2065 }
2066 tw_dev->pending_request_count--;
2067 } else {
2068 /* If we get here, we will continue re-posting on the next command interrupt */
2069 break;
2070 }
2071 }
2072 /* If there are no more pending requests, we mask command interrupt */
2073 if (tw_dev->pending_request_count == 0)
2074 TW_MASK_COMMAND_INTERRUPT(tw_dev);
2075 }
2076
2077 /* Handle response interrupt */
2078 if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
2079 /* Drain the response queue from the board */
2080 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
2081 /* Read response queue register */
2082 response_que.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
2083 request_id = TW_RESID_OUT(response_que.response_id);
2084 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
2085 error = 0;
2086
2087 /* Check for bad response */
2088 if (command_packet->status != 0) {
2089 /* If internal command, don't error, don't fill sense */
2090 if (tw_dev->srb[request_id] == NULL) {
2091 tw_decode_sense(tw_dev, request_id, 0);
2092 } else {
2093 error = tw_decode_sense(tw_dev, request_id, 1);
2094 }
2095 }
2096
2097 /* Check for correct state */
2098 if (tw_dev->state[request_id] != TW_S_POSTED) {
2099 if (tw_dev->srb[request_id] != NULL) {
2100 printk(KERN_WARNING "3w-xxxx: scsi%d: Received a request id that wasn't posted.\n", tw_dev->host->host_no);
2101 error = 1;
2102 }
2103 }
2104
2105 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Response queue request id: %d.\n", request_id);
2106
2107 /* Check for internal command completion */
2108 if (tw_dev->srb[request_id] == NULL) {
2109 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Found internally posted command.\n");
2110 /* Check for chrdev ioctl completion */
2111 if (request_id != tw_dev->chrdev_request_id) {
2112 retval = tw_aen_complete(tw_dev, request_id);
2113 if (retval) {
2114 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing aen.\n", tw_dev->host->host_no);
2115 }
2116 } else {
2117 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
2118 wake_up(&tw_dev->ioctl_wqueue);
2119 }
2120 } else {
2121 switch (tw_dev->srb[request_id]->cmnd[0]) {
2122 case READ_10:
2123 case READ_6:
2124 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_10/READ_6\n");
2125 break;
2126 case WRITE_10:
2127 case WRITE_6:
2128 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught WRITE_10/WRITE_6\n");
2129 break;
2130 case TEST_UNIT_READY:
2131 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught TEST_UNIT_READY\n");
2132 error = tw_scsiop_test_unit_ready_complete(tw_dev, request_id);
2133 break;
2134 case INQUIRY:
2135 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught INQUIRY\n");
2136 error = tw_scsiop_inquiry_complete(tw_dev, request_id);
2137 break;
2138 case READ_CAPACITY:
2139 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_CAPACITY\n");
2140 error = tw_scsiop_read_capacity_complete(tw_dev, request_id);
2141 break;
2142 case MODE_SENSE:
2143 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught MODE_SENSE\n");
2144 error = tw_scsiop_mode_sense_complete(tw_dev, request_id);
2145 break;
2146 case SYNCHRONIZE_CACHE:
2147 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught SYNCHRONIZE_CACHE\n");
2148 break;
2149 default:
2150 printk(KERN_WARNING "3w-xxxx: case slip in tw_interrupt()\n");
2151 error = 1;
2152 }
2153
2154 /* If no error command was a success */
2155 if (error == 0) {
2156 tw_dev->srb[request_id]->result = (DID_OK << 16);
2157 }
2158
2159 /* If error, command failed */
2160 if (error == 1) {
2161 /* Ask for a host reset */
2162 tw_dev->srb[request_id]->result = (DID_OK << 16) | SAM_STAT_CHECK_CONDITION;
2163 }
2164
2165 /* Now complete the io */
2166 if ((error != TW_ISR_DONT_COMPLETE)) {
2167 scsi_dma_unmap(tw_dev->srb[request_id]);
2168 scsi_done(tw_dev->srb[request_id]);
2169 tw_dev->state[request_id] = TW_S_COMPLETED;
2170 tw_state_request_finish(tw_dev, request_id);
2171 tw_dev->posted_request_count--;
2172 }
2173 }
2174
2175 /* Check for valid status after each drain */
2176 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2177 if (tw_check_bits(status_reg_value)) {
2178 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2179 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2180 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2181 goto tw_interrupt_bail;
2182 }
2183 }
2184 }
2185 }
2186
2187tw_interrupt_bail:
2188 spin_unlock(tw_dev->host->host_lock);
2189 return IRQ_RETVAL(handled);
2190} /* End tw_interrupt() */
2191
2192/* This function tells the controller to shut down */
2193static void __tw_shutdown(TW_Device_Extension *tw_dev)
2194{
2195 /* Disable interrupts */
2196 TW_DISABLE_INTERRUPTS(tw_dev);
2197
2198 /* Free up the IRQ */
2199 free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
2200
2201 printk(KERN_WARNING "3w-xxxx: Shutting down host %d.\n", tw_dev->host->host_no);
2202
2203 /* Tell the card we are shutting down */
2204 if (tw_initconnection(tw_dev, 1)) {
2205 printk(KERN_WARNING "3w-xxxx: Connection shutdown failed.\n");
2206 } else {
2207 printk(KERN_WARNING "3w-xxxx: Shutdown complete.\n");
2208 }
2209
2210 /* Clear all interrupts just before exit */
2211 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2212} /* End __tw_shutdown() */
2213
2214/* Wrapper for __tw_shutdown */
2215static void tw_shutdown(struct pci_dev *pdev)
2216{
2217 struct Scsi_Host *host = pci_get_drvdata(pdev);
2218 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2219
2220 __tw_shutdown(tw_dev);
2221} /* End tw_shutdown() */
2222
2223/* This function gets called when a disk is coming online */
2224static int tw_slave_configure(struct scsi_device *sdev)
2225{
2226 /* Force 60 second timeout */
2227 blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
2228
2229 return 0;
2230} /* End tw_slave_configure() */
2231
2232static const struct scsi_host_template driver_template = {
2233 .module = THIS_MODULE,
2234 .name = "3ware Storage Controller",
2235 .queuecommand = tw_scsi_queue,
2236 .eh_host_reset_handler = tw_scsi_eh_reset,
2237 .bios_param = tw_scsi_biosparam,
2238 .change_queue_depth = scsi_change_queue_depth,
2239 .can_queue = TW_Q_LENGTH-2,
2240 .slave_configure = tw_slave_configure,
2241 .this_id = -1,
2242 .sg_tablesize = TW_MAX_SGL_LENGTH,
2243 .max_sectors = TW_MAX_SECTORS,
2244 .cmd_per_lun = TW_MAX_CMDS_PER_LUN,
2245 .shost_groups = tw_host_groups,
2246 .emulated = 1,
2247 .no_write_same = 1,
2248};
2249
2250/* This function will probe and initialize a card */
2251static int tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
2252{
2253 struct Scsi_Host *host = NULL;
2254 TW_Device_Extension *tw_dev;
2255 int retval;
2256
2257 retval = pci_enable_device(pdev);
2258 if (retval) {
2259 printk(KERN_WARNING "3w-xxxx: Failed to enable pci device.");
2260 goto out_disable_device;
2261 }
2262
2263 pci_set_master(pdev);
2264
2265 retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2266 if (retval) {
2267 printk(KERN_WARNING "3w-xxxx: Failed to set dma mask.");
2268 goto out_disable_device;
2269 }
2270
2271 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2272 if (!host) {
2273 printk(KERN_WARNING "3w-xxxx: Failed to allocate memory for device extension.");
2274 retval = -ENOMEM;
2275 goto out_disable_device;
2276 }
2277 tw_dev = (TW_Device_Extension *)host->hostdata;
2278
2279 /* Save values to device extension */
2280 tw_dev->host = host;
2281 tw_dev->tw_pci_dev = pdev;
2282
2283 if (tw_initialize_device_extension(tw_dev)) {
2284 printk(KERN_WARNING "3w-xxxx: Failed to initialize device extension.");
2285 retval = -ENOMEM;
2286 goto out_free_device_extension;
2287 }
2288
2289 /* Request IO regions */
2290 retval = pci_request_regions(pdev, "3w-xxxx");
2291 if (retval) {
2292 printk(KERN_WARNING "3w-xxxx: Failed to get mem region.");
2293 goto out_free_device_extension;
2294 }
2295
2296 /* Save base address */
2297 tw_dev->base_addr = pci_resource_start(pdev, 0);
2298 if (!tw_dev->base_addr) {
2299 printk(KERN_WARNING "3w-xxxx: Failed to get io address.");
2300 retval = -ENOMEM;
2301 goto out_release_mem_region;
2302 }
2303
2304 /* Disable interrupts on the card */
2305 TW_DISABLE_INTERRUPTS(tw_dev);
2306
2307 /* Initialize the card */
2308 if (tw_reset_sequence(tw_dev)) {
2309 retval = -EINVAL;
2310 goto out_release_mem_region;
2311 }
2312
2313 /* Set host specific parameters */
2314 host->max_id = TW_MAX_UNITS;
2315 host->max_cmd_len = TW_MAX_CDB_LEN;
2316
2317 /* Luns and channels aren't supported by adapter */
2318 host->max_lun = 0;
2319 host->max_channel = 0;
2320
2321 /* Register the card with the kernel SCSI layer */
2322 retval = scsi_add_host(host, &pdev->dev);
2323 if (retval) {
2324 printk(KERN_WARNING "3w-xxxx: scsi add host failed");
2325 goto out_release_mem_region;
2326 }
2327
2328 pci_set_drvdata(pdev, host);
2329
2330 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);
2331
2332 /* Now setup the interrupt handler */
2333 retval = request_irq(pdev->irq, tw_interrupt, IRQF_SHARED, "3w-xxxx", tw_dev);
2334 if (retval) {
2335 printk(KERN_WARNING "3w-xxxx: Error requesting IRQ.");
2336 goto out_remove_host;
2337 }
2338
2339 tw_device_extension_list[tw_device_extension_count] = tw_dev;
2340 tw_device_extension_count++;
2341
2342 /* Re-enable interrupts on the card */
2343 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2344
2345 /* Finally, scan the host */
2346 scsi_scan_host(host);
2347
2348 if (twe_major == -1) {
2349 if ((twe_major = register_chrdev (0, "twe", &tw_fops)) < 0)
2350 printk(KERN_WARNING "3w-xxxx: Failed to register character device.");
2351 }
2352 return 0;
2353
2354out_remove_host:
2355 scsi_remove_host(host);
2356out_release_mem_region:
2357 pci_release_regions(pdev);
2358out_free_device_extension:
2359 tw_free_device_extension(tw_dev);
2360 scsi_host_put(host);
2361out_disable_device:
2362 pci_disable_device(pdev);
2363
2364 return retval;
2365} /* End tw_probe() */
2366
2367/* This function is called to remove a device */
2368static void tw_remove(struct pci_dev *pdev)
2369{
2370 struct Scsi_Host *host = pci_get_drvdata(pdev);
2371 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2372
2373 scsi_remove_host(tw_dev->host);
2374
2375 /* Unregister character device */
2376 if (twe_major >= 0) {
2377 unregister_chrdev(twe_major, "twe");
2378 twe_major = -1;
2379 }
2380
2381 /* Shutdown the card */
2382 __tw_shutdown(tw_dev);
2383
2384 /* Free up the mem region */
2385 pci_release_regions(pdev);
2386
2387 /* Free up device extension resources */
2388 tw_free_device_extension(tw_dev);
2389
2390 scsi_host_put(tw_dev->host);
2391 pci_disable_device(pdev);
2392 tw_device_extension_count--;
2393} /* End tw_remove() */
2394
2395/* PCI Devices supported by this driver */
2396static struct pci_device_id tw_pci_tbl[] = {
2397 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_1000,
2398 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2399 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_7000,
2400 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2401 { }
2402};
2403MODULE_DEVICE_TABLE(pci, tw_pci_tbl);
2404
2405/* pci_driver initializer */
2406static struct pci_driver tw_driver = {
2407 .name = "3w-xxxx",
2408 .id_table = tw_pci_tbl,
2409 .probe = tw_probe,
2410 .remove = tw_remove,
2411 .shutdown = tw_shutdown,
2412};
2413
2414/* This function is called on driver initialization */
2415static int __init tw_init(void)
2416{
2417 printk(KERN_WARNING "3ware Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2418
2419 return pci_register_driver(&tw_driver);
2420} /* End tw_init() */
2421
2422/* This function is called on driver exit */
2423static void __exit tw_exit(void)
2424{
2425 pci_unregister_driver(&tw_driver);
2426} /* End tw_exit() */
2427
2428module_init(tw_init);
2429module_exit(tw_exit);
2430