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net/netlabel: Add kmalloc NULL tests
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / 3w-xxxx.c
blobfaa0fcfed71e3e2ddd258c87feb9a7283365b86c
1 /*
2 3w-xxxx.c -- 3ware Storage Controller device driver for Linux.
3
4 Written By: Adam Radford <linuxraid@amcc.com>
5 Modifications By: Joel Jacobson <linux@3ware.com>
6 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
7 Brad Strand <linux@3ware.com>
8
9 Copyright (C) 1999-2009 3ware Inc.
10
11 Kernel compatiblity By: Andre Hedrick <andre@suse.com>
12 Non-Copyright (C) 2000 Andre Hedrick <andre@suse.com>
13
14 Further tiny build fixes and trivial hoovering Alan Cox
15
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; version 2 of the License.
19
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
24
25 NO WARRANTY
26 THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
27 CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
28 LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
29 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
30 solely responsible for determining the appropriateness of using and
31 distributing the Program and assumes all risks associated with its
32 exercise of rights under this Agreement, including but not limited to
33 the risks and costs of program errors, damage to or loss of data,
34 programs or equipment, and unavailability or interruption of operations.
35
36 DISCLAIMER OF LIABILITY
37 NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
38 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39 DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
40 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
41 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
42 USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
43 HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
44
45 You should have received a copy of the GNU General Public License
46 along with this program; if not, write to the Free Software
47 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
48
49 Bugs/Comments/Suggestions should be mailed to:
50 linuxraid@amcc.com
51
52 For more information, goto:
53 http://www.amcc.com
54
55 History
56 -------
57 0.1.000 - Initial release.
58 0.4.000 - Added support for Asynchronous Event Notification through
59 ioctls for 3DM.
60 1.0.000 - Added DPO & FUA bit support for WRITE_10 & WRITE_6 cdb
61 to disable drive write-cache before writes.
62 1.1.000 - Fixed performance bug with DPO & FUA not existing for WRITE_6.
63 1.2.000 - Added support for clean shutdown notification/feature table.
64 1.02.00.001 - Added support for full command packet posts through ioctls
65 for 3DM.
66 Bug fix so hot spare drives don't show up.
67 1.02.00.002 - Fix bug with tw_setfeature() call that caused oops on some
68 systems.
69 08/21/00 - release previously allocated resources on failure at
70 tw_allocate_memory (acme)
71 1.02.00.003 - Fix tw_interrupt() to report error to scsi layer when
72 controller status is non-zero.
73 Added handling of request_sense opcode.
74 Fix possible null pointer dereference in
75 tw_reset_device_extension()
76 1.02.00.004 - Add support for device id of 3ware 7000 series controllers.
77 Make tw_setfeature() call with interrupts disabled.
78 Register interrupt handler before enabling interrupts.
79 Clear attention interrupt before draining aen queue.
80 1.02.00.005 - Allocate bounce buffers and custom queue depth for raid5 for
81 6000 and 5000 series controllers.
82 Reduce polling mdelays causing problems on some systems.
83 Fix use_sg = 1 calculation bug.
84 Check for scsi_register returning NULL.
85 Add aen count to /proc/scsi/3w-xxxx.
86 Remove aen code unit masking in tw_aen_complete().
87 1.02.00.006 - Remove unit from printk in tw_scsi_eh_abort(), causing
88 possible oops.
89 Fix possible null pointer dereference in tw_scsi_queue()
90 if done function pointer was invalid.
91 1.02.00.007 - Fix possible null pointer dereferences in tw_ioctl().
92 Remove check for invalid done function pointer from
93 tw_scsi_queue().
94 1.02.00.008 - Set max sectors per io to TW_MAX_SECTORS in tw_findcards().
95 Add tw_decode_error() for printing readable error messages.
96 Print some useful information on certain aen codes.
97 Add tw_decode_bits() for interpreting status register output.
98 Make scsi_set_pci_device() for kernels >= 2.4.4
99 Fix bug where aen's could be lost before a reset.
100 Re-add spinlocks in tw_scsi_detect().
101 Fix possible null pointer dereference in tw_aen_drain_queue()
102 during initialization.
103 Clear pci parity errors during initialization and during io.
104 1.02.00.009 - Remove redundant increment in tw_state_request_start().
105 Add ioctl support for direct ATA command passthru.
106 Add entire aen code string list.
107 1.02.00.010 - Cleanup queueing code, fix jbod thoughput.
108 Fix get_param for specific units.
109 1.02.00.011 - Fix bug in tw_aen_complete() where aen's could be lost.
110 Fix tw_aen_drain_queue() to display useful info at init.
111 Set tw_host->max_id for 12 port cards.
112 Add ioctl support for raw command packet post from userspace
113 with sglist fragments (parameter and io).
114 1.02.00.012 - Fix read capacity to under report by 1 sector to fix get
115 last sector ioctl.
116 1.02.00.013 - Fix bug where more AEN codes weren't coming out during
117 driver initialization.
118 Improved handling of PCI aborts.
119 1.02.00.014 - Fix bug in tw_findcards() where AEN code could be lost.
120 Increase timeout in tw_aen_drain_queue() to 30 seconds.
121 1.02.00.015 - Re-write raw command post with data ioctl method.
122 Remove raid5 bounce buffers for raid5 for 6XXX for kernel 2.5
123 Add tw_map/unmap_scsi_sg/single_data() for kernel 2.5
124 Replace io_request_lock with host_lock for kernel 2.5
125 Set max_cmd_len to 16 for 3dm for kernel 2.5
126 1.02.00.016 - Set host->max_sectors back up to 256.
127 1.02.00.017 - Modified pci parity error handling/clearing from config space
128 during initialization.
129 1.02.00.018 - Better handling of request sense opcode and sense information
130 for failed commands. Add tw_decode_sense().
131 Replace all mdelay()'s with scsi_sleep().
132 1.02.00.019 - Revert mdelay's and scsi_sleep's, this caused problems on
133 some SMP systems.
134 1.02.00.020 - Add pci_set_dma_mask(), rewrite kmalloc()/virt_to_bus() to
135 pci_alloc/free_consistent().
136 Better alignment checking in tw_allocate_memory().
137 Cleanup tw_initialize_device_extension().
138 1.02.00.021 - Bump cmd_per_lun in SHT to 255 for better jbod performance.
139 Improve handling of errors in tw_interrupt().
140 Add handling/clearing of controller queue error.
141 Empty stale responses before draining aen queue.
142 Fix tw_scsi_eh_abort() to not reset on every io abort.
143 Set can_queue in SHT to 255 to prevent hang from AEN.
144 1.02.00.022 - Fix possible null pointer dereference in tw_scsi_release().
145 1.02.00.023 - Fix bug in tw_aen_drain_queue() where unit # was always zero.
146 1.02.00.024 - Add severity levels to AEN strings.
147 1.02.00.025 - Fix command interrupt spurious error messages.
148 Fix bug in raw command post with data ioctl method.
149 Fix bug where rollcall sometimes failed with cable errors.
150 Print unit # on all command timeouts.
151 1.02.00.026 - Fix possible infinite retry bug with power glitch induced
152 drive timeouts.
153 Cleanup some AEN severity levels.
154 1.02.00.027 - Add drive not supported AEN code for SATA controllers.
155 Remove spurious unknown ioctl error message.
156 1.02.00.028 - Fix bug where multiple controllers with no units were the
157 same card number.
158 Fix bug where cards were being shut down more than once.
159 1.02.00.029 - Add missing pci_free_consistent() in tw_allocate_memory().
160 Replace pci_map_single() with pci_map_page() for highmem.
161 Check for tw_setfeature() failure.
162 1.02.00.030 - Make driver 64-bit clean.
163 1.02.00.031 - Cleanup polling timeouts/routines in several places.
164 Add support for mode sense opcode.
165 Add support for cache mode page.
166 Add support for synchronize cache opcode.
167 1.02.00.032 - Fix small multicard rollcall bug.
168 Make driver stay loaded with no units for hot add/swap.
169 Add support for "twe" character device for ioctls.
170 Clean up request_id queueing code.
171 Fix tw_scsi_queue() spinlocks.
172 1.02.00.033 - Fix tw_aen_complete() to not queue 'queue empty' AEN's.
173 Initialize queues correctly when loading with no valid units.
174 1.02.00.034 - Fix tw_decode_bits() to handle multiple errors.
175 Add support for user configurable cmd_per_lun.
176 Add support for sht->slave_configure().
177 1.02.00.035 - Improve tw_allocate_memory() memory allocation.
178 Fix tw_chrdev_ioctl() to sleep correctly.
179 1.02.00.036 - Increase character ioctl timeout to 60 seconds.
180 1.02.00.037 - Fix tw_ioctl() to handle all non-data ATA passthru cmds
181 for 'smartmontools' support.
182 1.26.00.038 - Roll driver minor version to 26 to denote kernel 2.6.
183 Add support for cmds_per_lun module parameter.
184 1.26.00.039 - Fix bug in tw_chrdev_ioctl() polling code.
185 Fix data_buffer_length usage in tw_chrdev_ioctl().
186 Update contact information.
187 1.26.02.000 - Convert driver to pci_driver format.
188 1.26.02.001 - Increase max ioctl buffer size to 512 sectors.
189 Make tw_scsi_queue() return 0 for 'Unknown scsi opcode'.
190 Fix tw_remove() to free irq handler/unregister_chrdev()
191 before shutting down card.
192 Change to new 'change_queue_depth' api.
193 Fix 'handled=1' ISR usage, remove bogus IRQ check.
194 1.26.02.002 - Free irq handler in __tw_shutdown().
195 Turn on RCD bit for caching mode page.
196 Serialize reset code.
197 */
198
199 #include <linux/module.h>
200 #include <linux/reboot.h>
201 #include <linux/smp_lock.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/pci.h>
209 #include <linux/time.h>
210 #include <linux/mutex.h>
211 #include <asm/io.h>
212 #include <asm/irq.h>
213 #include <asm/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 "3w-xxxx.h"
219
220 /* Globals */
221 #define TW_DRIVER_VERSION "1.26.02.002"
222 static TW_Device_Extension *tw_device_extension_list[TW_MAX_SLOT];
223 static int tw_device_extension_count = 0;
224 static int twe_major = -1;
225
226 /* Module parameters */
227 MODULE_AUTHOR("AMCC");
228 MODULE_DESCRIPTION("3ware Storage Controller Linux Driver");
229 MODULE_LICENSE("GPL");
230 MODULE_VERSION(TW_DRIVER_VERSION);
231
232 /* Function prototypes */
233 static int tw_reset_device_extension(TW_Device_Extension *tw_dev);
234
235 /* Functions */
236
237 /* This function will check the status register for unexpected bits */
238 static int tw_check_bits(u32 status_reg_value)
239 {
240 if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS) {
241 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): No expected bits (0x%x).\n", status_reg_value);
242 return 1;
243 }
244 if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0) {
245 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): Found unexpected bits (0x%x).\n", status_reg_value);
246 return 1;
247 }
248
249 return 0;
250 } /* End tw_check_bits() */
251
252 /* This function will print readable messages from status register errors */
253 static int tw_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value, int print_host)
254 {
255 char host[16];
256
257 dprintk(KERN_WARNING "3w-xxxx: tw_decode_bits()\n");
258
259 if (print_host)
260 sprintf(host, " scsi%d:", tw_dev->host->host_no);
261 else
262 host[0] = '\0';
263
264 if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) {
265 printk(KERN_WARNING "3w-xxxx:%s PCI Parity Error: clearing.\n", host);
266 outl(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
267 }
268
269 if (status_reg_value & TW_STATUS_PCI_ABORT) {
270 printk(KERN_WARNING "3w-xxxx:%s PCI Abort: clearing.\n", host);
271 outl(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev));
272 pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT);
273 }
274
275 if (status_reg_value & TW_STATUS_QUEUE_ERROR) {
276 printk(KERN_WARNING "3w-xxxx:%s Controller Queue Error: clearing.\n", host);
277 outl(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
278 }
279
280 if (status_reg_value & TW_STATUS_SBUF_WRITE_ERROR) {
281 printk(KERN_WARNING "3w-xxxx:%s SBUF Write Error: clearing.\n", host);
282 outl(TW_CONTROL_CLEAR_SBUF_WRITE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
283 }
284
285 if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
286 if (tw_dev->reset_print == 0) {
287 printk(KERN_WARNING "3w-xxxx:%s Microcontroller Error: clearing.\n", host);
288 tw_dev->reset_print = 1;
289 }
290 return 1;
291 }
292
293 return 0;
294 } /* End tw_decode_bits() */
295
296 /* This function will poll the status register for a flag */
297 static int tw_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds)
298 {
299 u32 status_reg_value;
300 unsigned long before;
301 int retval = 1;
302
303 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
304 before = jiffies;
305
306 if (tw_check_bits(status_reg_value))
307 tw_decode_bits(tw_dev, status_reg_value, 0);
308
309 while ((status_reg_value & flag) != flag) {
310 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
311
312 if (tw_check_bits(status_reg_value))
313 tw_decode_bits(tw_dev, status_reg_value, 0);
314
315 if (time_after(jiffies, before + HZ * seconds))
316 goto out;
317
318 msleep(50);
319 }
320 retval = 0;
321 out:
322 return retval;
323 } /* End tw_poll_status() */
324
325 /* This function will poll the status register for disappearance of a flag */
326 static int tw_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds)
327 {
328 u32 status_reg_value;
329 unsigned long before;
330 int retval = 1;
331
332 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
333 before = jiffies;
334
335 if (tw_check_bits(status_reg_value))
336 tw_decode_bits(tw_dev, status_reg_value, 0);
337
338 while ((status_reg_value & flag) != 0) {
339 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
340
341 if (tw_check_bits(status_reg_value))
342 tw_decode_bits(tw_dev, status_reg_value, 0);
343
344 if (time_after(jiffies, before + HZ * seconds))
345 goto out;
346
347 msleep(50);
348 }
349 retval = 0;
350 out:
351 return retval;
352 } /* End tw_poll_status_gone() */
353
354 /* This function will attempt to post a command packet to the board */
355 static int tw_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
356 {
357 u32 status_reg_value;
358 unsigned long command_que_value;
359
360 dprintk(KERN_NOTICE "3w-xxxx: tw_post_command_packet()\n");
361 command_que_value = tw_dev->command_packet_physical_address[request_id];
362 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
363
364 if (tw_check_bits(status_reg_value)) {
365 dprintk(KERN_WARNING "3w-xxxx: tw_post_command_packet(): Unexpected bits.\n");
366 tw_decode_bits(tw_dev, status_reg_value, 1);
367 }
368
369 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
370 /* We successfully posted the command packet */
371 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
372 tw_dev->state[request_id] = TW_S_POSTED;
373 tw_dev->posted_request_count++;
374 if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) {
375 tw_dev->max_posted_request_count = tw_dev->posted_request_count;
376 }
377 } else {
378 /* Couldn't post the command packet, so we do it in the isr */
379 if (tw_dev->state[request_id] != TW_S_PENDING) {
380 tw_dev->state[request_id] = TW_S_PENDING;
381 tw_dev->pending_request_count++;
382 if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) {
383 tw_dev->max_pending_request_count = tw_dev->pending_request_count;
384 }
385 tw_dev->pending_queue[tw_dev->pending_tail] = request_id;
386 if (tw_dev->pending_tail == TW_Q_LENGTH-1) {
387 tw_dev->pending_tail = TW_Q_START;
388 } else {
389 tw_dev->pending_tail = tw_dev->pending_tail + 1;
390 }
391 }
392 TW_UNMASK_COMMAND_INTERRUPT(tw_dev);
393 return 1;
394 }
395 return 0;
396 } /* End tw_post_command_packet() */
397
398 /* This function will return valid sense buffer information for failed cmds */
399 static int tw_decode_sense(TW_Device_Extension *tw_dev, int request_id, int fill_sense)
400 {
401 int i;
402 TW_Command *command;
403
404 dprintk(KERN_WARNING "3w-xxxx: tw_decode_sense()\n");
405 command = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
406
407 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));
408
409 /* Attempt to return intelligent sense information */
410 if (fill_sense) {
411 if ((command->status == 0xc7) || (command->status == 0xcb)) {
412 for (i = 0; i < ARRAY_SIZE(tw_sense_table); i++) {
413 if (command->flags == tw_sense_table[i][0]) {
414
415 /* Valid bit and 'current errors' */
416 tw_dev->srb[request_id]->sense_buffer[0] = (0x1 << 7 | 0x70);
417
418 /* Sense key */
419 tw_dev->srb[request_id]->sense_buffer[2] = tw_sense_table[i][1];
420
421 /* Additional sense length */
422 tw_dev->srb[request_id]->sense_buffer[7] = 0xa; /* 10 bytes */
423
424 /* Additional sense code */
425 tw_dev->srb[request_id]->sense_buffer[12] = tw_sense_table[i][2];
426
427 /* Additional sense code qualifier */
428 tw_dev->srb[request_id]->sense_buffer[13] = tw_sense_table[i][3];
429
430 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
431 return TW_ISR_DONT_RESULT; /* Special case for isr to not over-write result */
432 }
433 }
434 }
435
436 /* If no table match, error so we get a reset */
437 return 1;
438 }
439
440 return 0;
441 } /* End tw_decode_sense() */
442
443 /* This function will report controller error status */
444 static int tw_check_errors(TW_Device_Extension *tw_dev)
445 {
446 u32 status_reg_value;
447
448 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
449
450 if (TW_STATUS_ERRORS(status_reg_value) || tw_check_bits(status_reg_value)) {
451 tw_decode_bits(tw_dev, status_reg_value, 0);
452 return 1;
453 }
454
455 return 0;
456 } /* End tw_check_errors() */
457
458 /* This function will empty the response que */
459 static void tw_empty_response_que(TW_Device_Extension *tw_dev)
460 {
461 u32 status_reg_value, response_que_value;
462
463 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
464
465 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
466 response_que_value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
467 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
468 }
469 } /* End tw_empty_response_que() */
470
471 /* This function will free a request_id */
472 static void tw_state_request_finish(TW_Device_Extension *tw_dev, int request_id)
473 {
474 tw_dev->free_queue[tw_dev->free_tail] = request_id;
475 tw_dev->state[request_id] = TW_S_FINISHED;
476 tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
477 } /* End tw_state_request_finish() */
478
479 /* This function will assign an available request_id */
480 static void tw_state_request_start(TW_Device_Extension *tw_dev, int *request_id)
481 {
482 *request_id = tw_dev->free_queue[tw_dev->free_head];
483 tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
484 tw_dev->state[*request_id] = TW_S_STARTED;
485 } /* End tw_state_request_start() */
486
487 /* Show some statistics about the card */
488 static ssize_t tw_show_stats(struct device *dev, struct device_attribute *attr,
489 char *buf)
490 {
491 struct Scsi_Host *host = class_to_shost(dev);
492 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
493 unsigned long flags = 0;
494 ssize_t len;
495
496 spin_lock_irqsave(tw_dev->host->host_lock, flags);
497 len = snprintf(buf, PAGE_SIZE, "3w-xxxx Driver version: %s\n"
498 "Current commands posted: %4d\n"
499 "Max commands posted: %4d\n"
500 "Current pending commands: %4d\n"
501 "Max pending commands: %4d\n"
502 "Last sgl length: %4d\n"
503 "Max sgl length: %4d\n"
504 "Last sector count: %4d\n"
505 "Max sector count: %4d\n"
506 "SCSI Host Resets: %4d\n"
507 "AEN's: %4d\n",
508 TW_DRIVER_VERSION,
509 tw_dev->posted_request_count,
510 tw_dev->max_posted_request_count,
511 tw_dev->pending_request_count,
512 tw_dev->max_pending_request_count,
513 tw_dev->sgl_entries,
514 tw_dev->max_sgl_entries,
515 tw_dev->sector_count,
516 tw_dev->max_sector_count,
517 tw_dev->num_resets,
518 tw_dev->aen_count);
519 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
520 return len;
521 } /* End tw_show_stats() */
522
523 /* This function will set a devices queue depth */
524 static int tw_change_queue_depth(struct scsi_device *sdev, int queue_depth)
525 {
526 if (queue_depth > TW_Q_LENGTH-2)
527 queue_depth = TW_Q_LENGTH-2;
528 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
529 return queue_depth;
530 } /* End tw_change_queue_depth() */
531
532 /* Create sysfs 'stats' entry */
533 static struct device_attribute tw_host_stats_attr = {
534 .attr = {
535 .name = "stats",
536 .mode = S_IRUGO,
537 },
538 .show = tw_show_stats
539 };
540
541 /* Host attributes initializer */
542 static struct device_attribute *tw_host_attrs[] = {
543 &tw_host_stats_attr,
544 NULL,
545 };
546
547 /* This function will read the aen queue from the isr */
548 static int tw_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
549 {
550 TW_Command *command_packet;
551 TW_Param *param;
552 unsigned long command_que_value;
553 u32 status_reg_value;
554 unsigned long param_value = 0;
555
556 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_read_queue()\n");
557
558 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
559 if (tw_check_bits(status_reg_value)) {
560 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Unexpected bits.\n");
561 tw_decode_bits(tw_dev, status_reg_value, 1);
562 return 1;
563 }
564 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
565 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet virtual address.\n");
566 return 1;
567 }
568 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
569 memset(command_packet, 0, sizeof(TW_Sector));
570 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
571 command_packet->size = 4;
572 command_packet->request_id = request_id;
573 command_packet->status = 0;
574 command_packet->flags = 0;
575 command_packet->byte6.parameter_count = 1;
576 command_que_value = tw_dev->command_packet_physical_address[request_id];
577 if (command_que_value == 0) {
578 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet physical address.\n");
579 return 1;
580 }
581 /* Now setup the param */
582 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
583 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment virtual address.\n");
584 return 1;
585 }
586 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
587 memset(param, 0, sizeof(TW_Sector));
588 param->table_id = 0x401; /* AEN table */
589 param->parameter_id = 2; /* Unit code */
590 param->parameter_size_bytes = 2;
591 param_value = tw_dev->alignment_physical_address[request_id];
592 if (param_value == 0) {
593 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment physical address.\n");
594 return 1;
595 }
596 command_packet->byte8.param.sgl[0].address = param_value;
597 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
598
599 /* Now post the command packet */
600 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
601 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post succeeded.\n");
602 tw_dev->srb[request_id] = NULL; /* Flag internal command */
603 tw_dev->state[request_id] = TW_S_POSTED;
604 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
605 } else {
606 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post failed, will retry.\n");
607 return 1;
608 }
609
610 return 0;
611 } /* End tw_aen_read_queue() */
612
613 /* This function will complete an aen request from the isr */
614 static int tw_aen_complete(TW_Device_Extension *tw_dev, int request_id)
615 {
616 TW_Param *param;
617 unsigned short aen;
618 int error = 0, table_max = 0;
619
620 dprintk(KERN_WARNING "3w-xxxx: tw_aen_complete()\n");
621 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
622 printk(KERN_WARNING "3w-xxxx: tw_aen_complete(): Bad alignment virtual address.\n");
623 return 1;
624 }
625 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
626 aen = *(unsigned short *)(param->data);
627 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_complete(): Queue'd code 0x%x\n", aen);
628
629 /* Print some useful info when certain aen codes come out */
630 if (aen == 0x0ff) {
631 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: INFO: AEN queue overflow.\n", tw_dev->host->host_no);
632 } else {
633 table_max = ARRAY_SIZE(tw_aen_string);
634 if ((aen & 0x0ff) < table_max) {
635 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
636 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s%d.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff], aen >> 8);
637 } else {
638 if (aen != 0x0)
639 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff]);
640 }
641 } else {
642 printk(KERN_WARNING "3w-xxxx: scsi%d: Received AEN %d.\n", tw_dev->host->host_no, aen);
643 }
644 }
645 if (aen != TW_AEN_QUEUE_EMPTY) {
646 tw_dev->aen_count++;
647
648 /* Now queue the code */
649 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
650 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
651 tw_dev->aen_tail = TW_Q_START;
652 } else {
653 tw_dev->aen_tail = tw_dev->aen_tail + 1;
654 }
655 if (tw_dev->aen_head == tw_dev->aen_tail) {
656 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
657 tw_dev->aen_head = TW_Q_START;
658 } else {
659 tw_dev->aen_head = tw_dev->aen_head + 1;
660 }
661 }
662
663 error = tw_aen_read_queue(tw_dev, request_id);
664 if (error) {
665 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing AEN.\n", tw_dev->host->host_no);
666 tw_dev->state[request_id] = TW_S_COMPLETED;
667 tw_state_request_finish(tw_dev, request_id);
668 }
669 } else {
670 tw_dev->state[request_id] = TW_S_COMPLETED;
671 tw_state_request_finish(tw_dev, request_id);
672 }
673
674 return 0;
675 } /* End tw_aen_complete() */
676
677 /* This function will drain the aen queue after a soft reset */
678 static int tw_aen_drain_queue(TW_Device_Extension *tw_dev)
679 {
680 TW_Command *command_packet;
681 TW_Param *param;
682 int request_id = 0;
683 unsigned long command_que_value;
684 unsigned long param_value;
685 TW_Response_Queue response_queue;
686 unsigned short aen;
687 unsigned short aen_code;
688 int finished = 0;
689 int first_reset = 0;
690 int queue = 0;
691 int found = 0, table_max = 0;
692
693 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_drain_queue()\n");
694
695 if (tw_poll_status(tw_dev, TW_STATUS_ATTENTION_INTERRUPT | TW_STATUS_MICROCONTROLLER_READY, 30)) {
696 dprintk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): No attention interrupt for card %d.\n", tw_device_extension_count);
697 return 1;
698 }
699 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
700
701 /* Empty response queue */
702 tw_empty_response_que(tw_dev);
703
704 /* Initialize command packet */
705 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
706 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet virtual address.\n");
707 return 1;
708 }
709 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
710 memset(command_packet, 0, sizeof(TW_Sector));
711 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
712 command_packet->size = 4;
713 command_packet->request_id = request_id;
714 command_packet->status = 0;
715 command_packet->flags = 0;
716 command_packet->byte6.parameter_count = 1;
717 command_que_value = tw_dev->command_packet_physical_address[request_id];
718 if (command_que_value == 0) {
719 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet physical address.\n");
720 return 1;
721 }
722
723 /* Now setup the param */
724 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
725 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment virtual address.\n");
726 return 1;
727 }
728 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
729 memset(param, 0, sizeof(TW_Sector));
730 param->table_id = 0x401; /* AEN table */
731 param->parameter_id = 2; /* Unit code */
732 param->parameter_size_bytes = 2;
733 param_value = tw_dev->alignment_physical_address[request_id];
734 if (param_value == 0) {
735 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment physical address.\n");
736 return 1;
737 }
738 command_packet->byte8.param.sgl[0].address = param_value;
739 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
740
741 /* Now drain the controller's aen queue */
742 do {
743 /* Post command packet */
744 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
745
746 /* Now poll for completion */
747 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
748 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
749 request_id = TW_RESID_OUT(response_queue.response_id);
750
751 if (request_id != 0) {
752 /* Unexpected request id */
753 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Unexpected request id.\n");
754 return 1;
755 }
756
757 if (command_packet->status != 0) {
758 if (command_packet->flags != TW_AEN_TABLE_UNDEFINED) {
759 /* Bad response */
760 tw_decode_sense(tw_dev, request_id, 0);
761 return 1;
762 } else {
763 /* We know this is a 3w-1x00, and doesn't support aen's */
764 return 0;
765 }
766 }
767
768 /* Now check the aen */
769 aen = *(unsigned short *)(param->data);
770 aen_code = (aen & 0x0ff);
771 queue = 0;
772 switch (aen_code) {
773 case TW_AEN_QUEUE_EMPTY:
774 dprintk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
775 if (first_reset != 1) {
776 return 1;
777 } else {
778 finished = 1;
779 }
780 break;
781 case TW_AEN_SOFT_RESET:
782 if (first_reset == 0) {
783 first_reset = 1;
784 } else {
785 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
786 tw_dev->aen_count++;
787 queue = 1;
788 }
789 break;
790 default:
791 if (aen == 0x0ff) {
792 printk(KERN_WARNING "3w-xxxx: AEN: INFO: AEN queue overflow.\n");
793 } else {
794 table_max = ARRAY_SIZE(tw_aen_string);
795 if ((aen & 0x0ff) < table_max) {
796 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
797 printk(KERN_WARNING "3w-xxxx: AEN: %s%d.\n", tw_aen_string[aen & 0xff], aen >> 8);
798 } else {
799 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
800 }
801 } else
802 printk(KERN_WARNING "3w-xxxx: Received AEN %d.\n", aen);
803 }
804 tw_dev->aen_count++;
805 queue = 1;
806 }
807
808 /* Now put the aen on the aen_queue */
809 if (queue == 1) {
810 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
811 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
812 tw_dev->aen_tail = TW_Q_START;
813 } else {
814 tw_dev->aen_tail = tw_dev->aen_tail + 1;
815 }
816 if (tw_dev->aen_head == tw_dev->aen_tail) {
817 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
818 tw_dev->aen_head = TW_Q_START;
819 } else {
820 tw_dev->aen_head = tw_dev->aen_head + 1;
821 }
822 }
823 }
824 found = 1;
825 }
826 if (found == 0) {
827 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Response never received.\n");
828 return 1;
829 }
830 } while (finished == 0);
831
832 return 0;
833 } /* End tw_aen_drain_queue() */
834
835 /* This function will allocate memory */
836 static int tw_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
837 {
838 int i;
839 dma_addr_t dma_handle;
840 unsigned long *cpu_addr = NULL;
841
842 dprintk(KERN_NOTICE "3w-xxxx: tw_allocate_memory()\n");
843
844 cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
845 if (cpu_addr == NULL) {
846 printk(KERN_WARNING "3w-xxxx: pci_alloc_consistent() failed.\n");
847 return 1;
848 }
849
850 if ((unsigned long)cpu_addr % (tw_dev->tw_pci_dev->device == TW_DEVICE_ID ? TW_ALIGNMENT_6000 : TW_ALIGNMENT_7000)) {
851 printk(KERN_WARNING "3w-xxxx: Couldn't allocate correctly aligned memory.\n");
852 pci_free_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, cpu_addr, dma_handle);
853 return 1;
854 }
855
856 memset(cpu_addr, 0, size*TW_Q_LENGTH);
857
858 for (i=0;i<TW_Q_LENGTH;i++) {
859 switch(which) {
860 case 0:
861 tw_dev->command_packet_physical_address[i] = dma_handle+(i*size);
862 tw_dev->command_packet_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
863 break;
864 case 1:
865 tw_dev->alignment_physical_address[i] = dma_handle+(i*size);
866 tw_dev->alignment_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
867 break;
868 default:
869 printk(KERN_WARNING "3w-xxxx: tw_allocate_memory(): case slip in tw_allocate_memory()\n");
870 return 1;
871 }
872 }
873
874 return 0;
875 } /* End tw_allocate_memory() */
876
877 /* This function handles ioctl for the character device */
878 static int tw_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
879 {
880 int request_id;
881 dma_addr_t dma_handle;
882 unsigned short tw_aen_code;
883 unsigned long flags;
884 unsigned int data_buffer_length = 0;
885 unsigned long data_buffer_length_adjusted = 0;
886 unsigned long *cpu_addr;
887 long timeout;
888 TW_New_Ioctl *tw_ioctl;
889 TW_Passthru *passthru;
890 TW_Device_Extension *tw_dev = tw_device_extension_list[iminor(inode)];
891 int retval = -EFAULT;
892 void __user *argp = (void __user *)arg;
893
894 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl()\n");
895
896 /* Only let one of these through at a time */
897 if (mutex_lock_interruptible(&tw_dev->ioctl_lock))
898 return -EINTR;
899
900 /* First copy down the buffer length */
901 if (copy_from_user(&data_buffer_length, argp, sizeof(unsigned int)))
902 goto out;
903
904 /* Check size */
905 if (data_buffer_length > TW_MAX_IOCTL_SECTORS * 512) {
906 retval = -EINVAL;
907 goto out;
908 }
909
910 /* Hardware can only do multiple of 512 byte transfers */
911 data_buffer_length_adjusted = (data_buffer_length + 511) & ~511;
912
913 /* Now allocate ioctl buf memory */
914 cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, &dma_handle, GFP_KERNEL);
915 if (cpu_addr == NULL) {
916 retval = -ENOMEM;
917 goto out;
918 }
919
920 tw_ioctl = (TW_New_Ioctl *)cpu_addr;
921
922 /* Now copy down the entire ioctl */
923 if (copy_from_user(tw_ioctl, argp, data_buffer_length + sizeof(TW_New_Ioctl) - 1))
924 goto out2;
925
926 passthru = (TW_Passthru *)&tw_ioctl->firmware_command;
927
928 /* See which ioctl we are doing */
929 switch (cmd) {
930 case TW_OP_NOP:
931 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_OP_NOP.\n");
932 break;
933 case TW_OP_AEN_LISTEN:
934 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_AEN_LISTEN.\n");
935 memset(tw_ioctl->data_buffer, 0, data_buffer_length);
936
937 spin_lock_irqsave(tw_dev->host->host_lock, flags);
938 if (tw_dev->aen_head == tw_dev->aen_tail) {
939 tw_aen_code = TW_AEN_QUEUE_EMPTY;
940 } else {
941 tw_aen_code = tw_dev->aen_queue[tw_dev->aen_head];
942 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
943 tw_dev->aen_head = TW_Q_START;
944 } else {
945 tw_dev->aen_head = tw_dev->aen_head + 1;
946 }
947 }
948 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
949 memcpy(tw_ioctl->data_buffer, &tw_aen_code, sizeof(tw_aen_code));
950 break;
951 case TW_CMD_PACKET_WITH_DATA:
952 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_CMD_PACKET_WITH_DATA.\n");
953 spin_lock_irqsave(tw_dev->host->host_lock, flags);
954
955 tw_state_request_start(tw_dev, &request_id);
956
957 /* Flag internal command */
958 tw_dev->srb[request_id] = NULL;
959
960 /* Flag chrdev ioctl */
961 tw_dev->chrdev_request_id = request_id;
962
963 tw_ioctl->firmware_command.request_id = request_id;
964
965 /* Load the sg list */
966 switch (TW_SGL_OUT(tw_ioctl->firmware_command.opcode__sgloffset)) {
967 case 2:
968 tw_ioctl->firmware_command.byte8.param.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
969 tw_ioctl->firmware_command.byte8.param.sgl[0].length = data_buffer_length_adjusted;
970 break;
971 case 3:
972 tw_ioctl->firmware_command.byte8.io.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
973 tw_ioctl->firmware_command.byte8.io.sgl[0].length = data_buffer_length_adjusted;
974 break;
975 case 5:
976 passthru->sg_list[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
977 passthru->sg_list[0].length = data_buffer_length_adjusted;
978 break;
979 }
980
981 memcpy(tw_dev->command_packet_virtual_address[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command));
982
983 /* Now post the command packet to the controller */
984 tw_post_command_packet(tw_dev, request_id);
985 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
986
987 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
988
989 /* Now wait for the command to complete */
990 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
991
992 /* We timed out, and didn't get an interrupt */
993 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
994 /* Now we need to reset the board */
995 printk(KERN_WARNING "3w-xxxx: scsi%d: Character ioctl (0x%x) timed out, resetting card.\n", tw_dev->host->host_no, cmd);
996 retval = -EIO;
997 if (tw_reset_device_extension(tw_dev)) {
998 printk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): Reset failed for card %d.\n", tw_dev->host->host_no);
999 }
1000 goto out2;
1001 }
1002
1003 /* Now copy in the command packet response */
1004 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virtual_address[request_id], sizeof(TW_Command));
1005
1006 /* Now complete the io */
1007 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1008 tw_dev->posted_request_count--;
1009 tw_dev->state[request_id] = TW_S_COMPLETED;
1010 tw_state_request_finish(tw_dev, request_id);
1011 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1012 break;
1013 default:
1014 retval = -ENOTTY;
1015 goto out2;
1016 }
1017
1018 /* Now copy the response to userspace */
1019 if (copy_to_user(argp, tw_ioctl, sizeof(TW_New_Ioctl) + data_buffer_length - 1))
1020 goto out2;
1021 retval = 0;
1022 out2:
1023 /* Now free ioctl buf memory */
1024 dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, cpu_addr, dma_handle);
1025 out:
1026 mutex_unlock(&tw_dev->ioctl_lock);
1027 return retval;
1028 } /* End tw_chrdev_ioctl() */
1029
1030 /* This function handles open for the character device */
1031 /* NOTE that this function races with remove. */
1032 static int tw_chrdev_open(struct inode *inode, struct file *file)
1033 {
1034 unsigned int minor_number;
1035
1036 cycle_kernel_lock();
1037 dprintk(KERN_WARNING "3w-xxxx: tw_ioctl_open()\n");
1038
1039 minor_number = iminor(inode);
1040 if (minor_number >= tw_device_extension_count)
1041 return -ENODEV;
1042
1043 return 0;
1044 } /* End tw_chrdev_open() */
1045
1046 /* File operations struct for character device */
1047 static const struct file_operations tw_fops = {
1048 .owner = THIS_MODULE,
1049 .ioctl = tw_chrdev_ioctl,
1050 .open = tw_chrdev_open,
1051 .release = NULL
1052 };
1053
1054 /* This function will free up device extension resources */
1055 static void tw_free_device_extension(TW_Device_Extension *tw_dev)
1056 {
1057 dprintk(KERN_NOTICE "3w-xxxx: tw_free_device_extension()\n");
1058
1059 /* Free command packet and generic buffer memory */
1060 if (tw_dev->command_packet_virtual_address[0])
1061 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]);
1062
1063 if (tw_dev->alignment_virtual_address[0])
1064 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]);
1065 } /* End tw_free_device_extension() */
1066
1067 /* This function will send an initconnection command to controller */
1068 static int tw_initconnection(TW_Device_Extension *tw_dev, int message_credits)
1069 {
1070 unsigned long command_que_value;
1071 TW_Command *command_packet;
1072 TW_Response_Queue response_queue;
1073 int request_id = 0;
1074
1075 dprintk(KERN_NOTICE "3w-xxxx: tw_initconnection()\n");
1076
1077 /* Initialize InitConnection command packet */
1078 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1079 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet virtual address.\n");
1080 return 1;
1081 }
1082
1083 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1084 memset(command_packet, 0, sizeof(TW_Sector));
1085 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_INIT_CONNECTION);
1086 command_packet->size = TW_INIT_COMMAND_PACKET_SIZE;
1087 command_packet->request_id = request_id;
1088 command_packet->status = 0x0;
1089 command_packet->flags = 0x0;
1090 command_packet->byte6.message_credits = message_credits;
1091 command_packet->byte8.init_connection.response_queue_pointer = 0x0;
1092 command_que_value = tw_dev->command_packet_physical_address[request_id];
1093
1094 if (command_que_value == 0) {
1095 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet physical address.\n");
1096 return 1;
1097 }
1098
1099 /* Send command packet to the board */
1100 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1101
1102 /* Poll for completion */
1103 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1104 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1105 request_id = TW_RESID_OUT(response_queue.response_id);
1106
1107 if (request_id != 0) {
1108 /* unexpected request id */
1109 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Unexpected request id.\n");
1110 return 1;
1111 }
1112 if (command_packet->status != 0) {
1113 /* bad response */
1114 tw_decode_sense(tw_dev, request_id, 0);
1115 return 1;
1116 }
1117 }
1118 return 0;
1119 } /* End tw_initconnection() */
1120
1121 /* Set a value in the features table */
1122 static int tw_setfeature(TW_Device_Extension *tw_dev, int parm, int param_size,
1123 unsigned char *val)
1124 {
1125 TW_Param *param;
1126 TW_Command *command_packet;
1127 TW_Response_Queue response_queue;
1128 int request_id = 0;
1129 unsigned long command_que_value;
1130 unsigned long param_value;
1131
1132 /* Initialize SetParam command packet */
1133 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1134 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet virtual address.\n");
1135 return 1;
1136 }
1137 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1138 memset(command_packet, 0, sizeof(TW_Sector));
1139 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1140
1141 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
1142 param->table_id = 0x404; /* Features table */
1143 param->parameter_id = parm;
1144 param->parameter_size_bytes = param_size;
1145 memcpy(param->data, val, param_size);
1146
1147 param_value = tw_dev->alignment_physical_address[request_id];
1148 if (param_value == 0) {
1149 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad alignment physical address.\n");
1150 tw_dev->state[request_id] = TW_S_COMPLETED;
1151 tw_state_request_finish(tw_dev, request_id);
1152 tw_dev->srb[request_id]->result = (DID_OK << 16);
1153 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1154 }
1155 command_packet->byte8.param.sgl[0].address = param_value;
1156 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1157
1158 command_packet->size = 4;
1159 command_packet->request_id = request_id;
1160 command_packet->byte6.parameter_count = 1;
1161
1162 command_que_value = tw_dev->command_packet_physical_address[request_id];
1163 if (command_que_value == 0) {
1164 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet physical address.\n");
1165 return 1;
1166 }
1167
1168 /* Send command packet to the board */
1169 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1170
1171 /* Poll for completion */
1172 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1173 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1174 request_id = TW_RESID_OUT(response_queue.response_id);
1175
1176 if (request_id != 0) {
1177 /* unexpected request id */
1178 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Unexpected request id.\n");
1179 return 1;
1180 }
1181 if (command_packet->status != 0) {
1182 /* bad response */
1183 tw_decode_sense(tw_dev, request_id, 0);
1184 return 1;
1185 }
1186 }
1187
1188 return 0;
1189 } /* End tw_setfeature() */
1190
1191 /* This function will reset a controller */
1192 static int tw_reset_sequence(TW_Device_Extension *tw_dev)
1193 {
1194 int error = 0;
1195 int tries = 0;
1196 unsigned char c = 1;
1197
1198 /* Reset the board */
1199 while (tries < TW_MAX_RESET_TRIES) {
1200 TW_SOFT_RESET(tw_dev);
1201
1202 error = tw_aen_drain_queue(tw_dev);
1203 if (error) {
1204 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN drain failed, retrying.\n", tw_dev->host->host_no);
1205 tries++;
1206 continue;
1207 }
1208
1209 /* Check for controller errors */
1210 if (tw_check_errors(tw_dev)) {
1211 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors found, retrying.\n", tw_dev->host->host_no);
1212 tries++;
1213 continue;
1214 }
1215
1216 /* Now the controller is in a good state */
1217 break;
1218 }
1219
1220 if (tries >= TW_MAX_RESET_TRIES) {
1221 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors, card not responding, check all cabling.\n", tw_dev->host->host_no);
1222 return 1;
1223 }
1224
1225 error = tw_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS);
1226 if (error) {
1227 printk(KERN_WARNING "3w-xxxx: scsi%d: Connection initialization failed.\n", tw_dev->host->host_no);
1228 return 1;
1229 }
1230
1231 error = tw_setfeature(tw_dev, 2, 1, &c);
1232 if (error) {
1233 printk(KERN_WARNING "3w-xxxx: Unable to set features for card, probable old firmware or card.\n");
1234 }
1235
1236 return 0;
1237 } /* End tw_reset_sequence() */
1238
1239 /* This function will initialize the fields of a device extension */
1240 static int tw_initialize_device_extension(TW_Device_Extension *tw_dev)
1241 {
1242 int i, error=0;
1243
1244 dprintk(KERN_NOTICE "3w-xxxx: tw_initialize_device_extension()\n");
1245
1246 /* Initialize command packet buffers */
1247 error = tw_allocate_memory(tw_dev, sizeof(TW_Command), 0);
1248 if (error) {
1249 printk(KERN_WARNING "3w-xxxx: Command packet memory allocation failed.\n");
1250 return 1;
1251 }
1252
1253 /* Initialize generic buffer */
1254 error = tw_allocate_memory(tw_dev, sizeof(TW_Sector), 1);
1255 if (error) {
1256 printk(KERN_WARNING "3w-xxxx: Generic memory allocation failed.\n");
1257 return 1;
1258 }
1259
1260 for (i=0;i<TW_Q_LENGTH;i++) {
1261 tw_dev->free_queue[i] = i;
1262 tw_dev->state[i] = TW_S_INITIAL;
1263 }
1264
1265 tw_dev->pending_head = TW_Q_START;
1266 tw_dev->pending_tail = TW_Q_START;
1267 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1268
1269 mutex_init(&tw_dev->ioctl_lock);
1270 init_waitqueue_head(&tw_dev->ioctl_wqueue);
1271
1272 return 0;
1273 } /* End tw_initialize_device_extension() */
1274
1275 static int tw_map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
1276 {
1277 int use_sg;
1278
1279 dprintk(KERN_WARNING "3w-xxxx: tw_map_scsi_sg_data()\n");
1280
1281 use_sg = scsi_dma_map(cmd);
1282 if (use_sg < 0) {
1283 printk(KERN_WARNING "3w-xxxx: tw_map_scsi_sg_data(): pci_map_sg() failed.\n");
1284 return 0;
1285 }
1286
1287 cmd->SCp.phase = TW_PHASE_SGLIST;
1288 cmd->SCp.have_data_in = use_sg;
1289
1290 return use_sg;
1291 } /* End tw_map_scsi_sg_data() */
1292
1293 static void tw_unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
1294 {
1295 dprintk(KERN_WARNING "3w-xxxx: tw_unmap_scsi_data()\n");
1296
1297 if (cmd->SCp.phase == TW_PHASE_SGLIST)
1298 scsi_dma_unmap(cmd);
1299 } /* End tw_unmap_scsi_data() */
1300
1301 /* This function will reset a device extension */
1302 static int tw_reset_device_extension(TW_Device_Extension *tw_dev)
1303 {
1304 int i = 0;
1305 struct scsi_cmnd *srb;
1306 unsigned long flags = 0;
1307
1308 dprintk(KERN_NOTICE "3w-xxxx: tw_reset_device_extension()\n");
1309
1310 set_bit(TW_IN_RESET, &tw_dev->flags);
1311 TW_DISABLE_INTERRUPTS(tw_dev);
1312 TW_MASK_COMMAND_INTERRUPT(tw_dev);
1313 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1314
1315 /* Abort all requests that are in progress */
1316 for (i=0;i<TW_Q_LENGTH;i++) {
1317 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1318 (tw_dev->state[i] != TW_S_INITIAL) &&
1319 (tw_dev->state[i] != TW_S_COMPLETED)) {
1320 srb = tw_dev->srb[i];
1321 if (srb != NULL) {
1322 srb->result = (DID_RESET << 16);
1323 tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);
1324 tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[i]);
1325 }
1326 }
1327 }
1328
1329 /* Reset queues and counts */
1330 for (i=0;i<TW_Q_LENGTH;i++) {
1331 tw_dev->free_queue[i] = i;
1332 tw_dev->state[i] = TW_S_INITIAL;
1333 }
1334 tw_dev->free_head = TW_Q_START;
1335 tw_dev->free_tail = TW_Q_START;
1336 tw_dev->posted_request_count = 0;
1337 tw_dev->pending_request_count = 0;
1338 tw_dev->pending_head = TW_Q_START;
1339 tw_dev->pending_tail = TW_Q_START;
1340 tw_dev->reset_print = 0;
1341
1342 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1343
1344 if (tw_reset_sequence(tw_dev)) {
1345 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset sequence failed.\n", tw_dev->host->host_no);
1346 return 1;
1347 }
1348
1349 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
1350 clear_bit(TW_IN_RESET, &tw_dev->flags);
1351 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1352
1353 return 0;
1354 } /* End tw_reset_device_extension() */
1355
1356 /* This funciton returns unit geometry in cylinders/heads/sectors */
1357 static int tw_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev,
1358 sector_t capacity, int geom[])
1359 {
1360 int heads, sectors, cylinders;
1361 TW_Device_Extension *tw_dev;
1362
1363 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam()\n");
1364 tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
1365
1366 heads = 64;
1367 sectors = 32;
1368 cylinders = sector_div(capacity, heads * sectors);
1369
1370 if (capacity >= 0x200000) {
1371 heads = 255;
1372 sectors = 63;
1373 cylinders = sector_div(capacity, heads * sectors);
1374 }
1375
1376 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam(): heads = %d, sectors = %d, cylinders = %d\n", heads, sectors, cylinders);
1377 geom[0] = heads;
1378 geom[1] = sectors;
1379 geom[2] = cylinders;
1380
1381 return 0;
1382 } /* End tw_scsi_biosparam() */
1383
1384 /* This is the new scsi eh reset function */
1385 static int tw_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1386 {
1387 TW_Device_Extension *tw_dev=NULL;
1388 int retval = FAILED;
1389
1390 tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1391
1392 tw_dev->num_resets++;
1393
1394 sdev_printk(KERN_WARNING, SCpnt->device,
1395 "WARNING: Command (0x%x) timed out, resetting card.\n",
1396 SCpnt->cmnd[0]);
1397
1398 /* Make sure we are not issuing an ioctl or resetting from ioctl */
1399 mutex_lock(&tw_dev->ioctl_lock);
1400
1401 /* Now reset the card and some of the device extension data */
1402 if (tw_reset_device_extension(tw_dev)) {
1403 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset failed.\n", tw_dev->host->host_no);
1404 goto out;
1405 }
1406
1407 retval = SUCCESS;
1408 out:
1409 mutex_unlock(&tw_dev->ioctl_lock);
1410 return retval;
1411 } /* End tw_scsi_eh_reset() */
1412
1413 /* This function handles scsi inquiry commands */
1414 static int tw_scsiop_inquiry(TW_Device_Extension *tw_dev, int request_id)
1415 {
1416 TW_Param *param;
1417 TW_Command *command_packet;
1418 unsigned long command_que_value;
1419 unsigned long param_value;
1420
1421 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry()\n");
1422
1423 /* Initialize command packet */
1424 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1425 if (command_packet == NULL) {
1426 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet virtual address.\n");
1427 return 1;
1428 }
1429 memset(command_packet, 0, sizeof(TW_Sector));
1430 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1431 command_packet->size = 4;
1432 command_packet->request_id = request_id;
1433 command_packet->status = 0;
1434 command_packet->flags = 0;
1435 command_packet->byte6.parameter_count = 1;
1436
1437 /* Now setup the param */
1438 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1439 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment virtual address.\n");
1440 return 1;
1441 }
1442 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1443 memset(param, 0, sizeof(TW_Sector));
1444 param->table_id = 3; /* unit summary table */
1445 param->parameter_id = 3; /* unitsstatus parameter */
1446 param->parameter_size_bytes = TW_MAX_UNITS;
1447 param_value = tw_dev->alignment_physical_address[request_id];
1448 if (param_value == 0) {
1449 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment physical address.\n");
1450 return 1;
1451 }
1452
1453 command_packet->byte8.param.sgl[0].address = param_value;
1454 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1455 command_que_value = tw_dev->command_packet_physical_address[request_id];
1456 if (command_que_value == 0) {
1457 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet physical address.\n");
1458 return 1;
1459 }
1460
1461 /* Now try to post the command packet */
1462 tw_post_command_packet(tw_dev, request_id);
1463
1464 return 0;
1465 } /* End tw_scsiop_inquiry() */
1466
1467 static void tw_transfer_internal(TW_Device_Extension *tw_dev, int request_id,
1468 void *data, unsigned int len)
1469 {
1470 scsi_sg_copy_from_buffer(tw_dev->srb[request_id], data, len);
1471 }
1472
1473 /* This function is called by the isr to complete an inquiry command */
1474 static int tw_scsiop_inquiry_complete(TW_Device_Extension *tw_dev, int request_id)
1475 {
1476 unsigned char *is_unit_present;
1477 unsigned char request_buffer[36];
1478 TW_Param *param;
1479
1480 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry_complete()\n");
1481
1482 memset(request_buffer, 0, sizeof(request_buffer));
1483 request_buffer[0] = TYPE_DISK; /* Peripheral device type */
1484 request_buffer[1] = 0; /* Device type modifier */
1485 request_buffer[2] = 0; /* No ansi/iso compliance */
1486 request_buffer[4] = 31; /* Additional length */
1487 memcpy(&request_buffer[8], "3ware ", 8); /* Vendor ID */
1488 sprintf(&request_buffer[16], "Logical Disk %-2d ", tw_dev->srb[request_id]->device->id);
1489 memcpy(&request_buffer[32], TW_DRIVER_VERSION, 3);
1490 tw_transfer_internal(tw_dev, request_id, request_buffer,
1491 sizeof(request_buffer));
1492
1493 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1494 if (param == NULL) {
1495 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry_complete(): Bad alignment virtual address.\n");
1496 return 1;
1497 }
1498 is_unit_present = &(param->data[0]);
1499
1500 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1501 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1502 } else {
1503 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1504 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1505 return TW_ISR_DONT_RESULT;
1506 }
1507
1508 return 0;
1509 } /* End tw_scsiop_inquiry_complete() */
1510
1511 /* This function handles scsi mode_sense commands */
1512 static int tw_scsiop_mode_sense(TW_Device_Extension *tw_dev, int request_id)
1513 {
1514 TW_Param *param;
1515 TW_Command *command_packet;
1516 unsigned long command_que_value;
1517 unsigned long param_value;
1518
1519 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense()\n");
1520
1521 /* Only page control = 0, page code = 0x8 (cache page) supported */
1522 if (tw_dev->srb[request_id]->cmnd[2] != 0x8) {
1523 tw_dev->state[request_id] = TW_S_COMPLETED;
1524 tw_state_request_finish(tw_dev, request_id);
1525 tw_dev->srb[request_id]->result = (DID_OK << 16);
1526 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1527 return 0;
1528 }
1529
1530 /* Now read firmware cache setting for this unit */
1531 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1532 if (command_packet == NULL) {
1533 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet virtual address.\n");
1534 return 1;
1535 }
1536
1537 /* Setup the command packet */
1538 memset(command_packet, 0, sizeof(TW_Sector));
1539 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1540 command_packet->size = 4;
1541 command_packet->request_id = request_id;
1542 command_packet->status = 0;
1543 command_packet->flags = 0;
1544 command_packet->byte6.parameter_count = 1;
1545
1546 /* Setup the param */
1547 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1548 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment virtual address.\n");
1549 return 1;
1550 }
1551
1552 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1553 memset(param, 0, sizeof(TW_Sector));
1554 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE + tw_dev->srb[request_id]->device->id;
1555 param->parameter_id = 7; /* unit flags */
1556 param->parameter_size_bytes = 1;
1557 param_value = tw_dev->alignment_physical_address[request_id];
1558 if (param_value == 0) {
1559 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment physical address.\n");
1560 return 1;
1561 }
1562
1563 command_packet->byte8.param.sgl[0].address = param_value;
1564 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1565 command_que_value = tw_dev->command_packet_physical_address[request_id];
1566 if (command_que_value == 0) {
1567 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet physical address.\n");
1568 return 1;
1569 }
1570
1571 /* Now try to post the command packet */
1572 tw_post_command_packet(tw_dev, request_id);
1573
1574 return 0;
1575 } /* End tw_scsiop_mode_sense() */
1576
1577 /* This function is called by the isr to complete a mode sense command */
1578 static int tw_scsiop_mode_sense_complete(TW_Device_Extension *tw_dev, int request_id)
1579 {
1580 TW_Param *param;
1581 unsigned char *flags;
1582 unsigned char request_buffer[8];
1583
1584 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense_complete()\n");
1585
1586 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1587 if (param == NULL) {
1588 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense_complete(): Bad alignment virtual address.\n");
1589 return 1;
1590 }
1591 flags = (char *)&(param->data[0]);
1592 memset(request_buffer, 0, sizeof(request_buffer));
1593
1594 request_buffer[0] = 0xf; /* mode data length */
1595 request_buffer[1] = 0; /* default medium type */
1596 request_buffer[2] = 0x10; /* dpo/fua support on */
1597 request_buffer[3] = 0; /* no block descriptors */
1598 request_buffer[4] = 0x8; /* caching page */
1599 request_buffer[5] = 0xa; /* page length */
1600 if (*flags & 0x1)
1601 request_buffer[6] = 0x5; /* WCE on, RCD on */
1602 else
1603 request_buffer[6] = 0x1; /* WCE off, RCD on */
1604 tw_transfer_internal(tw_dev, request_id, request_buffer,
1605 sizeof(request_buffer));
1606
1607 return 0;
1608 } /* End tw_scsiop_mode_sense_complete() */
1609
1610 /* This function handles scsi read_capacity commands */
1611 static int tw_scsiop_read_capacity(TW_Device_Extension *tw_dev, int request_id)
1612 {
1613 TW_Param *param;
1614 TW_Command *command_packet;
1615 unsigned long command_que_value;
1616 unsigned long param_value;
1617
1618 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity()\n");
1619
1620 /* Initialize command packet */
1621 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1622
1623 if (command_packet == NULL) {
1624 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet virtual address.\n");
1625 return 1;
1626 }
1627 memset(command_packet, 0, sizeof(TW_Sector));
1628 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1629 command_packet->size = 4;
1630 command_packet->request_id = request_id;
1631 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1632 command_packet->status = 0;
1633 command_packet->flags = 0;
1634 command_packet->byte6.block_count = 1;
1635
1636 /* Now setup the param */
1637 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1638 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment virtual address.\n");
1639 return 1;
1640 }
1641 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1642 memset(param, 0, sizeof(TW_Sector));
1643 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE +
1644 tw_dev->srb[request_id]->device->id;
1645 param->parameter_id = 4; /* unitcapacity parameter */
1646 param->parameter_size_bytes = 4;
1647 param_value = tw_dev->alignment_physical_address[request_id];
1648 if (param_value == 0) {
1649 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment physical address.\n");
1650 return 1;
1651 }
1652
1653 command_packet->byte8.param.sgl[0].address = param_value;
1654 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1655 command_que_value = tw_dev->command_packet_physical_address[request_id];
1656 if (command_que_value == 0) {
1657 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet physical address.\n");
1658 return 1;
1659 }
1660
1661 /* Now try to post the command to the board */
1662 tw_post_command_packet(tw_dev, request_id);
1663
1664 return 0;
1665 } /* End tw_scsiop_read_capacity() */
1666
1667 /* This function is called by the isr to complete a readcapacity command */
1668 static int tw_scsiop_read_capacity_complete(TW_Device_Extension *tw_dev, int request_id)
1669 {
1670 unsigned char *param_data;
1671 u32 capacity;
1672 char buff[8];
1673 TW_Param *param;
1674
1675 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete()\n");
1676
1677 memset(buff, 0, sizeof(buff));
1678 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1679 if (param == NULL) {
1680 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_capacity_complete(): Bad alignment virtual address.\n");
1681 return 1;
1682 }
1683 param_data = &(param->data[0]);
1684
1685 capacity = (param_data[3] << 24) | (param_data[2] << 16) |
1686 (param_data[1] << 8) | param_data[0];
1687
1688 /* Subtract one sector to fix get last sector ioctl */
1689 capacity -= 1;
1690
1691 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete(): Capacity = 0x%x.\n", capacity);
1692
1693 /* Number of LBA's */
1694 buff[0] = (capacity >> 24);
1695 buff[1] = (capacity >> 16) & 0xff;
1696 buff[2] = (capacity >> 8) & 0xff;
1697 buff[3] = capacity & 0xff;
1698
1699 /* Block size in bytes (512) */
1700 buff[4] = (TW_BLOCK_SIZE >> 24);
1701 buff[5] = (TW_BLOCK_SIZE >> 16) & 0xff;
1702 buff[6] = (TW_BLOCK_SIZE >> 8) & 0xff;
1703 buff[7] = TW_BLOCK_SIZE & 0xff;
1704
1705 tw_transfer_internal(tw_dev, request_id, buff, sizeof(buff));
1706
1707 return 0;
1708 } /* End tw_scsiop_read_capacity_complete() */
1709
1710 /* This function handles scsi read or write commands */
1711 static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id)
1712 {
1713 TW_Command *command_packet;
1714 unsigned long command_que_value;
1715 u32 lba = 0x0, num_sectors = 0x0;
1716 int i, use_sg;
1717 struct scsi_cmnd *srb;
1718 struct scatterlist *sglist, *sg;
1719
1720 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write()\n");
1721
1722 srb = tw_dev->srb[request_id];
1723
1724 sglist = scsi_sglist(srb);
1725 if (!sglist) {
1726 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Request buffer NULL.\n");
1727 return 1;
1728 }
1729
1730 /* Initialize command packet */
1731 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1732 if (command_packet == NULL) {
1733 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): Bad command packet virtual address.\n");
1734 return 1;
1735 }
1736
1737 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == READ_10) {
1738 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_READ);
1739 } else {
1740 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_WRITE);
1741 }
1742
1743 command_packet->size = 3;
1744 command_packet->request_id = request_id;
1745 command_packet->unit__hostid = TW_UNITHOST_IN(0, srb->device->id);
1746 command_packet->status = 0;
1747 command_packet->flags = 0;
1748
1749 if (srb->cmnd[0] == WRITE_10) {
1750 if ((srb->cmnd[1] & 0x8) || (srb->cmnd[1] & 0x10))
1751 command_packet->flags = 1;
1752 }
1753
1754 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6) {
1755 lba = ((u32)srb->cmnd[1] << 16) | ((u32)srb->cmnd[2] << 8) | (u32)srb->cmnd[3];
1756 num_sectors = (u32)srb->cmnd[4];
1757 } else {
1758 lba = ((u32)srb->cmnd[2] << 24) | ((u32)srb->cmnd[3] << 16) | ((u32)srb->cmnd[4] << 8) | (u32)srb->cmnd[5];
1759 num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
1760 }
1761
1762 /* Update sector statistic */
1763 tw_dev->sector_count = num_sectors;
1764 if (tw_dev->sector_count > tw_dev->max_sector_count)
1765 tw_dev->max_sector_count = tw_dev->sector_count;
1766
1767 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): lba = 0x%x num_sectors = 0x%x\n", lba, num_sectors);
1768 command_packet->byte8.io.lba = lba;
1769 command_packet->byte6.block_count = num_sectors;
1770
1771 use_sg = tw_map_scsi_sg_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
1772 if (!use_sg)
1773 return 1;
1774
1775 scsi_for_each_sg(tw_dev->srb[request_id], sg, use_sg, i) {
1776 command_packet->byte8.io.sgl[i].address = sg_dma_address(sg);
1777 command_packet->byte8.io.sgl[i].length = sg_dma_len(sg);
1778 command_packet->size+=2;
1779 }
1780
1781 /* Update SG statistics */
1782 tw_dev->sgl_entries = scsi_sg_count(tw_dev->srb[request_id]);
1783 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
1784 tw_dev->max_sgl_entries = tw_dev->sgl_entries;
1785
1786 command_que_value = tw_dev->command_packet_physical_address[request_id];
1787 if (command_que_value == 0) {
1788 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Bad command packet physical address.\n");
1789 return 1;
1790 }
1791
1792 /* Now try to post the command to the board */
1793 tw_post_command_packet(tw_dev, request_id);
1794
1795 return 0;
1796 } /* End tw_scsiop_read_write() */
1797
1798 /* This function will handle the request sense scsi command */
1799 static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id)
1800 {
1801 char request_buffer[18];
1802
1803 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n");
1804
1805 memset(request_buffer, 0, sizeof(request_buffer));
1806 request_buffer[0] = 0x70; /* Immediate fixed format */
1807 request_buffer[7] = 10; /* minimum size per SPC: 18 bytes */
1808 /* leave all other fields zero, giving effectively NO_SENSE return */
1809 tw_transfer_internal(tw_dev, request_id, request_buffer,
1810 sizeof(request_buffer));
1811
1812 tw_dev->state[request_id] = TW_S_COMPLETED;
1813 tw_state_request_finish(tw_dev, request_id);
1814
1815 /* If we got a request_sense, we probably want a reset, return error */
1816 tw_dev->srb[request_id]->result = (DID_ERROR << 16);
1817 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1818
1819 return 0;
1820 } /* End tw_scsiop_request_sense() */
1821
1822 /* This function will handle synchronize cache scsi command */
1823 static int tw_scsiop_synchronize_cache(TW_Device_Extension *tw_dev, int request_id)
1824 {
1825 TW_Command *command_packet;
1826 unsigned long command_que_value;
1827
1828 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_synchronize_cache()\n");
1829
1830 /* Send firmware flush command for this unit */
1831 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1832 if (command_packet == NULL) {
1833 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet virtual address.\n");
1834 return 1;
1835 }
1836
1837 /* Setup the command packet */
1838 memset(command_packet, 0, sizeof(TW_Sector));
1839 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_FLUSH_CACHE);
1840 command_packet->size = 2;
1841 command_packet->request_id = request_id;
1842 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1843 command_packet->status = 0;
1844 command_packet->flags = 0;
1845 command_packet->byte6.parameter_count = 1;
1846 command_que_value = tw_dev->command_packet_physical_address[request_id];
1847 if (command_que_value == 0) {
1848 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet physical address.\n");
1849 return 1;
1850 }
1851
1852 /* Now try to post the command packet */
1853 tw_post_command_packet(tw_dev, request_id);
1854
1855 return 0;
1856 } /* End tw_scsiop_synchronize_cache() */
1857
1858 /* This function will handle test unit ready scsi command */
1859 static int tw_scsiop_test_unit_ready(TW_Device_Extension *tw_dev, int request_id)
1860 {
1861 TW_Param *param;
1862 TW_Command *command_packet;
1863 unsigned long command_que_value;
1864 unsigned long param_value;
1865
1866 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_test_unit_ready()\n");
1867
1868 /* Initialize command packet */
1869 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1870 if (command_packet == NULL) {
1871 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet virtual address.\n");
1872 return 1;
1873 }
1874 memset(command_packet, 0, sizeof(TW_Sector));
1875 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1876 command_packet->size = 4;
1877 command_packet->request_id = request_id;
1878 command_packet->status = 0;
1879 command_packet->flags = 0;
1880 command_packet->byte6.parameter_count = 1;
1881
1882 /* Now setup the param */
1883 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1884 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment virtual address.\n");
1885 return 1;
1886 }
1887 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1888 memset(param, 0, sizeof(TW_Sector));
1889 param->table_id = 3; /* unit summary table */
1890 param->parameter_id = 3; /* unitsstatus parameter */
1891 param->parameter_size_bytes = TW_MAX_UNITS;
1892 param_value = tw_dev->alignment_physical_address[request_id];
1893 if (param_value == 0) {
1894 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment physical address.\n");
1895 return 1;
1896 }
1897
1898 command_packet->byte8.param.sgl[0].address = param_value;
1899 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1900 command_que_value = tw_dev->command_packet_physical_address[request_id];
1901 if (command_que_value == 0) {
1902 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet physical address.\n");
1903 return 1;
1904 }
1905
1906 /* Now try to post the command packet */
1907 tw_post_command_packet(tw_dev, request_id);
1908
1909 return 0;
1910 } /* End tw_scsiop_test_unit_ready() */
1911
1912 /* This function is called by the isr to complete a testunitready command */
1913 static int tw_scsiop_test_unit_ready_complete(TW_Device_Extension *tw_dev, int request_id)
1914 {
1915 unsigned char *is_unit_present;
1916 TW_Param *param;
1917
1918 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete()\n");
1919
1920 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1921 if (param == NULL) {
1922 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete(): Bad alignment virtual address.\n");
1923 return 1;
1924 }
1925 is_unit_present = &(param->data[0]);
1926
1927 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1928 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1929 } else {
1930 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1931 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1932 return TW_ISR_DONT_RESULT;
1933 }
1934
1935 return 0;
1936 } /* End tw_scsiop_test_unit_ready_complete() */
1937
1938 /* This is the main scsi queue function to handle scsi opcodes */
1939 static int tw_scsi_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
1940 {
1941 unsigned char *command = SCpnt->cmnd;
1942 int request_id = 0;
1943 int retval = 1;
1944 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1945
1946 /* If we are resetting due to timed out ioctl, report as busy */
1947 if (test_bit(TW_IN_RESET, &tw_dev->flags))
1948 return SCSI_MLQUEUE_HOST_BUSY;
1949
1950 /* Save done function into Scsi_Cmnd struct */
1951 SCpnt->scsi_done = done;
1952
1953 /* Queue the command and get a request id */
1954 tw_state_request_start(tw_dev, &request_id);
1955
1956 /* Save the scsi command for use by the ISR */
1957 tw_dev->srb[request_id] = SCpnt;
1958
1959 /* Initialize phase to zero */
1960 SCpnt->SCp.phase = TW_PHASE_INITIAL;
1961
1962 switch (*command) {
1963 case READ_10:
1964 case READ_6:
1965 case WRITE_10:
1966 case WRITE_6:
1967 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ/WRITE.\n");
1968 retval = tw_scsiop_read_write(tw_dev, request_id);
1969 break;
1970 case TEST_UNIT_READY:
1971 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught TEST_UNIT_READY.\n");
1972 retval = tw_scsiop_test_unit_ready(tw_dev, request_id);
1973 break;
1974 case INQUIRY:
1975 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught INQUIRY.\n");
1976 retval = tw_scsiop_inquiry(tw_dev, request_id);
1977 break;
1978 case READ_CAPACITY:
1979 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ_CAPACITY.\n");
1980 retval = tw_scsiop_read_capacity(tw_dev, request_id);
1981 break;
1982 case REQUEST_SENSE:
1983 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught REQUEST_SENSE.\n");
1984 retval = tw_scsiop_request_sense(tw_dev, request_id);
1985 break;
1986 case MODE_SENSE:
1987 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught MODE_SENSE.\n");
1988 retval = tw_scsiop_mode_sense(tw_dev, request_id);
1989 break;
1990 case SYNCHRONIZE_CACHE:
1991 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught SYNCHRONIZE_CACHE.\n");
1992 retval = tw_scsiop_synchronize_cache(tw_dev, request_id);
1993 break;
1994 case TW_IOCTL:
1995 printk(KERN_WARNING "3w-xxxx: SCSI_IOCTL_SEND_COMMAND deprecated, please update your 3ware tools.\n");
1996 break;
1997 default:
1998 printk(KERN_NOTICE "3w-xxxx: scsi%d: Unknown scsi opcode: 0x%x\n", tw_dev->host->host_no, *command);
1999 tw_dev->state[request_id] = TW_S_COMPLETED;
2000 tw_state_request_finish(tw_dev, request_id);
2001 SCpnt->result = (DID_BAD_TARGET << 16);
2002 done(SCpnt);
2003 retval = 0;
2004 }
2005 if (retval) {
2006 tw_dev->state[request_id] = TW_S_COMPLETED;
2007 tw_state_request_finish(tw_dev, request_id);
2008 SCpnt->result = (DID_ERROR << 16);
2009 done(SCpnt);
2010 retval = 0;
2011 }
2012 return retval;
2013 } /* End tw_scsi_queue() */
2014
2015 /* This function is the interrupt service routine */
2016 static irqreturn_t tw_interrupt(int irq, void *dev_instance)
2017 {
2018 int request_id;
2019 u32 status_reg_value;
2020 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
2021 TW_Response_Queue response_que;
2022 int error = 0, retval = 0;
2023 TW_Command *command_packet;
2024 int handled = 0;
2025
2026 /* Get the host lock for io completions */
2027 spin_lock(tw_dev->host->host_lock);
2028
2029 /* Read the registers */
2030 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2031
2032 /* Check if this is our interrupt, otherwise bail */
2033 if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
2034 goto tw_interrupt_bail;
2035
2036 handled = 1;
2037
2038 /* If we are resetting, bail */
2039 if (test_bit(TW_IN_RESET, &tw_dev->flags))
2040 goto tw_interrupt_bail;
2041
2042 /* Check controller for errors */
2043 if (tw_check_bits(status_reg_value)) {
2044 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2045 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2046 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2047 goto tw_interrupt_bail;
2048 }
2049 }
2050
2051 /* Handle host interrupt */
2052 if (status_reg_value & TW_STATUS_HOST_INTERRUPT) {
2053 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received host interrupt.\n");
2054 TW_CLEAR_HOST_INTERRUPT(tw_dev);
2055 }
2056
2057 /* Handle attention interrupt */
2058 if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
2059 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received attention interrupt.\n");
2060 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
2061 tw_state_request_start(tw_dev, &request_id);
2062 error = tw_aen_read_queue(tw_dev, request_id);
2063 if (error) {
2064 printk(KERN_WARNING "3w-xxxx: scsi%d: Error reading aen queue.\n", tw_dev->host->host_no);
2065 tw_dev->state[request_id] = TW_S_COMPLETED;
2066 tw_state_request_finish(tw_dev, request_id);
2067 }
2068 }
2069
2070 /* Handle command interrupt */
2071 if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
2072 /* Drain as many pending commands as we can */
2073 while (tw_dev->pending_request_count > 0) {
2074 request_id = tw_dev->pending_queue[tw_dev->pending_head];
2075 if (tw_dev->state[request_id] != TW_S_PENDING) {
2076 printk(KERN_WARNING "3w-xxxx: scsi%d: Found request id that wasn't pending.\n", tw_dev->host->host_no);
2077 break;
2078 }
2079 if (tw_post_command_packet(tw_dev, request_id)==0) {
2080 if (tw_dev->pending_head == TW_Q_LENGTH-1) {
2081 tw_dev->pending_head = TW_Q_START;
2082 } else {
2083 tw_dev->pending_head = tw_dev->pending_head + 1;
2084 }
2085 tw_dev->pending_request_count--;
2086 } else {
2087 /* If we get here, we will continue re-posting on the next command interrupt */
2088 break;
2089 }
2090 }
2091 /* If there are no more pending requests, we mask command interrupt */
2092 if (tw_dev->pending_request_count == 0)
2093 TW_MASK_COMMAND_INTERRUPT(tw_dev);
2094 }
2095
2096 /* Handle response interrupt */
2097 if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
2098 /* Drain the response queue from the board */
2099 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
2100 /* Read response queue register */
2101 response_que.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
2102 request_id = TW_RESID_OUT(response_que.response_id);
2103 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
2104 error = 0;
2105
2106 /* Check for bad response */
2107 if (command_packet->status != 0) {
2108 /* If internal command, don't error, don't fill sense */
2109 if (tw_dev->srb[request_id] == NULL) {
2110 tw_decode_sense(tw_dev, request_id, 0);
2111 } else {
2112 error = tw_decode_sense(tw_dev, request_id, 1);
2113 }
2114 }
2115
2116 /* Check for correct state */
2117 if (tw_dev->state[request_id] != TW_S_POSTED) {
2118 if (tw_dev->srb[request_id] != NULL) {
2119 printk(KERN_WARNING "3w-xxxx: scsi%d: Received a request id that wasn't posted.\n", tw_dev->host->host_no);
2120 error = 1;
2121 }
2122 }
2123
2124 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Response queue request id: %d.\n", request_id);
2125
2126 /* Check for internal command completion */
2127 if (tw_dev->srb[request_id] == NULL) {
2128 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Found internally posted command.\n");
2129 /* Check for chrdev ioctl completion */
2130 if (request_id != tw_dev->chrdev_request_id) {
2131 retval = tw_aen_complete(tw_dev, request_id);
2132 if (retval) {
2133 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing aen.\n", tw_dev->host->host_no);
2134 }
2135 } else {
2136 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
2137 wake_up(&tw_dev->ioctl_wqueue);
2138 }
2139 } else {
2140 switch (tw_dev->srb[request_id]->cmnd[0]) {
2141 case READ_10:
2142 case READ_6:
2143 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_10/READ_6\n");
2144 break;
2145 case WRITE_10:
2146 case WRITE_6:
2147 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught WRITE_10/WRITE_6\n");
2148 break;
2149 case TEST_UNIT_READY:
2150 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught TEST_UNIT_READY\n");
2151 error = tw_scsiop_test_unit_ready_complete(tw_dev, request_id);
2152 break;
2153 case INQUIRY:
2154 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught INQUIRY\n");
2155 error = tw_scsiop_inquiry_complete(tw_dev, request_id);
2156 break;
2157 case READ_CAPACITY:
2158 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_CAPACITY\n");
2159 error = tw_scsiop_read_capacity_complete(tw_dev, request_id);
2160 break;
2161 case MODE_SENSE:
2162 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught MODE_SENSE\n");
2163 error = tw_scsiop_mode_sense_complete(tw_dev, request_id);
2164 break;
2165 case SYNCHRONIZE_CACHE:
2166 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught SYNCHRONIZE_CACHE\n");
2167 break;
2168 default:
2169 printk(KERN_WARNING "3w-xxxx: case slip in tw_interrupt()\n");
2170 error = 1;
2171 }
2172
2173 /* If no error command was a success */
2174 if (error == 0) {
2175 tw_dev->srb[request_id]->result = (DID_OK << 16);
2176 }
2177
2178 /* If error, command failed */
2179 if (error == 1) {
2180 /* Ask for a host reset */
2181 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
2182 }
2183
2184 /* Now complete the io */
2185 if ((error != TW_ISR_DONT_COMPLETE)) {
2186 tw_dev->state[request_id] = TW_S_COMPLETED;
2187 tw_state_request_finish(tw_dev, request_id);
2188 tw_dev->posted_request_count--;
2189 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
2190
2191 tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
2192 }
2193 }
2194
2195 /* Check for valid status after each drain */
2196 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2197 if (tw_check_bits(status_reg_value)) {
2198 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2199 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2200 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2201 goto tw_interrupt_bail;
2202 }
2203 }
2204 }
2205 }
2206
2207 tw_interrupt_bail:
2208 spin_unlock(tw_dev->host->host_lock);
2209 return IRQ_RETVAL(handled);
2210 } /* End tw_interrupt() */
2211
2212 /* This function tells the controller to shut down */
2213 static void __tw_shutdown(TW_Device_Extension *tw_dev)
2214 {
2215 /* Disable interrupts */
2216 TW_DISABLE_INTERRUPTS(tw_dev);
2217
2218 /* Free up the IRQ */
2219 free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
2220
2221 printk(KERN_WARNING "3w-xxxx: Shutting down host %d.\n", tw_dev->host->host_no);
2222
2223 /* Tell the card we are shutting down */
2224 if (tw_initconnection(tw_dev, 1)) {
2225 printk(KERN_WARNING "3w-xxxx: Connection shutdown failed.\n");
2226 } else {
2227 printk(KERN_WARNING "3w-xxxx: Shutdown complete.\n");
2228 }
2229
2230 /* Clear all interrupts just before exit */
2231 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2232 } /* End __tw_shutdown() */
2233
2234 /* Wrapper for __tw_shutdown */
2235 static void tw_shutdown(struct pci_dev *pdev)
2236 {
2237 struct Scsi_Host *host = pci_get_drvdata(pdev);
2238 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2239
2240 __tw_shutdown(tw_dev);
2241 } /* End tw_shutdown() */
2242
2243 static struct scsi_host_template driver_template = {
2244 .module = THIS_MODULE,
2245 .name = "3ware Storage Controller",
2246 .queuecommand = tw_scsi_queue,
2247 .eh_host_reset_handler = tw_scsi_eh_reset,
2248 .bios_param = tw_scsi_biosparam,
2249 .change_queue_depth = tw_change_queue_depth,
2250 .can_queue = TW_Q_LENGTH-2,
2251 .this_id = -1,
2252 .sg_tablesize = TW_MAX_SGL_LENGTH,
2253 .max_sectors = TW_MAX_SECTORS,
2254 .cmd_per_lun = TW_MAX_CMDS_PER_LUN,
2255 .use_clustering = ENABLE_CLUSTERING,
2256 .shost_attrs = tw_host_attrs,
2257 .emulated = 1
2258 };
2259
2260 /* This function will probe and initialize a card */
2261 static int __devinit tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
2262 {
2263 struct Scsi_Host *host = NULL;
2264 TW_Device_Extension *tw_dev;
2265 int retval = -ENODEV;
2266
2267 retval = pci_enable_device(pdev);
2268 if (retval) {
2269 printk(KERN_WARNING "3w-xxxx: Failed to enable pci device.");
2270 goto out_disable_device;
2271 }
2272
2273 pci_set_master(pdev);
2274
2275 retval = pci_set_dma_mask(pdev, TW_DMA_MASK);
2276 if (retval) {
2277 printk(KERN_WARNING "3w-xxxx: Failed to set dma mask.");
2278 goto out_disable_device;
2279 }
2280
2281 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2282 if (!host) {
2283 printk(KERN_WARNING "3w-xxxx: Failed to allocate memory for device extension.");
2284 retval = -ENOMEM;
2285 goto out_disable_device;
2286 }
2287 tw_dev = (TW_Device_Extension *)host->hostdata;
2288
2289 /* Save values to device extension */
2290 tw_dev->host = host;
2291 tw_dev->tw_pci_dev = pdev;
2292
2293 if (tw_initialize_device_extension(tw_dev)) {
2294 printk(KERN_WARNING "3w-xxxx: Failed to initialize device extension.");
2295 goto out_free_device_extension;
2296 }
2297
2298 /* Request IO regions */
2299 retval = pci_request_regions(pdev, "3w-xxxx");
2300 if (retval) {
2301 printk(KERN_WARNING "3w-xxxx: Failed to get mem region.");
2302 goto out_free_device_extension;
2303 }
2304
2305 /* Save base address */
2306 tw_dev->base_addr = pci_resource_start(pdev, 0);
2307 if (!tw_dev->base_addr) {
2308 printk(KERN_WARNING "3w-xxxx: Failed to get io address.");
2309 goto out_release_mem_region;
2310 }
2311
2312 /* Disable interrupts on the card */
2313 TW_DISABLE_INTERRUPTS(tw_dev);
2314
2315 /* Initialize the card */
2316 if (tw_reset_sequence(tw_dev))
2317 goto out_release_mem_region;
2318
2319 /* Set host specific parameters */
2320 host->max_id = TW_MAX_UNITS;
2321 host->max_cmd_len = TW_MAX_CDB_LEN;
2322
2323 /* Luns and channels aren't supported by adapter */
2324 host->max_lun = 0;
2325 host->max_channel = 0;
2326
2327 /* Register the card with the kernel SCSI layer */
2328 retval = scsi_add_host(host, &pdev->dev);
2329 if (retval) {
2330 printk(KERN_WARNING "3w-xxxx: scsi add host failed");
2331 goto out_release_mem_region;
2332 }
2333
2334 pci_set_drvdata(pdev, host);
2335
2336 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);
2337
2338 /* Now setup the interrupt handler */
2339 retval = request_irq(pdev->irq, tw_interrupt, IRQF_SHARED, "3w-xxxx", tw_dev);
2340 if (retval) {
2341 printk(KERN_WARNING "3w-xxxx: Error requesting IRQ.");
2342 goto out_remove_host;
2343 }
2344
2345 tw_device_extension_list[tw_device_extension_count] = tw_dev;
2346 tw_device_extension_count++;
2347
2348 /* Re-enable interrupts on the card */
2349 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2350
2351 /* Finally, scan the host */
2352 scsi_scan_host(host);
2353
2354 if (twe_major == -1) {
2355 if ((twe_major = register_chrdev (0, "twe", &tw_fops)) < 0)
2356 printk(KERN_WARNING "3w-xxxx: Failed to register character device.");
2357 }
2358 return 0;
2359
2360 out_remove_host:
2361 scsi_remove_host(host);
2362 out_release_mem_region:
2363 pci_release_regions(pdev);
2364 out_free_device_extension:
2365 tw_free_device_extension(tw_dev);
2366 scsi_host_put(host);
2367 out_disable_device:
2368 pci_disable_device(pdev);
2369
2370 return retval;
2371 } /* End tw_probe() */
2372
2373 /* This function is called to remove a device */
2374 static void tw_remove(struct pci_dev *pdev)
2375 {
2376 struct Scsi_Host *host = pci_get_drvdata(pdev);
2377 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2378
2379 scsi_remove_host(tw_dev->host);
2380
2381 /* Unregister character device */
2382 if (twe_major >= 0) {
2383 unregister_chrdev(twe_major, "twe");
2384 twe_major = -1;
2385 }
2386
2387 /* Shutdown the card */
2388 __tw_shutdown(tw_dev);
2389
2390 /* Free up the mem region */
2391 pci_release_regions(pdev);
2392
2393 /* Free up device extension resources */
2394 tw_free_device_extension(tw_dev);
2395
2396 scsi_host_put(tw_dev->host);
2397 pci_disable_device(pdev);
2398 tw_device_extension_count--;
2399 } /* End tw_remove() */
2400
2401 /* PCI Devices supported by this driver */
2402 static struct pci_device_id tw_pci_tbl[] __devinitdata = {
2403 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_1000,
2404 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2405 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_7000,
2406 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2407 { }
2408 };
2409 MODULE_DEVICE_TABLE(pci, tw_pci_tbl);
2410
2411 /* pci_driver initializer */
2412 static struct pci_driver tw_driver = {
2413 .name = "3w-xxxx",
2414 .id_table = tw_pci_tbl,
2415 .probe = tw_probe,
2416 .remove = tw_remove,
2417 .shutdown = tw_shutdown,
2418 };
2419
2420 /* This function is called on driver initialization */
2421 static int __init tw_init(void)
2422 {
2423 printk(KERN_WARNING "3ware Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2424
2425 return pci_register_driver(&tw_driver);
2426 } /* End tw_init() */
2427
2428 /* This function is called on driver exit */
2429 static void __exit tw_exit(void)
2430 {
2431 pci_unregister_driver(&tw_driver);
2432 } /* End tw_exit() */
2433
2434 module_init(tw_init);
2435 module_exit(tw_exit);
2436
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