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cgroups: fix a race between cgroup_clone and umount
[linux-2.6/mini2440.git] / drivers / scsi / 3w-xxxx.c
blobc03f1d2c9e2ec1f08e1f37d1ab389bc68d517fc6
1 /*
2 3w-xxxx.c -- 3ware Storage Controller device driver for Linux.
3
4 Written By: Adam Radford <linuxraid@amcc.com>
5 Modifications By: Joel Jacobson <linux@3ware.com>
6 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
7 Brad Strand <linux@3ware.com>
8
9 Copyright (C) 1999-2007 3ware Inc.
10
11 Kernel compatiblity By: Andre Hedrick <andre@suse.com>
12 Non-Copyright (C) 2000 Andre Hedrick <andre@suse.com>
13
14 Further tiny build fixes and trivial hoovering Alan Cox
15
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; version 2 of the License.
19
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
24
25 NO WARRANTY
26 THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
27 CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
28 LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
29 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
30 solely responsible for determining the appropriateness of using and
31 distributing the Program and assumes all risks associated with its
32 exercise of rights under this Agreement, including but not limited to
33 the risks and costs of program errors, damage to or loss of data,
34 programs or equipment, and unavailability or interruption of operations.
35
36 DISCLAIMER OF LIABILITY
37 NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
38 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39 DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
40 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
41 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
42 USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
43 HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
44
45 You should have received a copy of the GNU General Public License
46 along with this program; if not, write to the Free Software
47 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
48
49 Bugs/Comments/Suggestions should be mailed to:
50 linuxraid@amcc.com
51
52 For more information, goto:
53 http://www.amcc.com
54
55 History
56 -------
57 0.1.000 - Initial release.
58 0.4.000 - Added support for Asynchronous Event Notification through
59 ioctls for 3DM.
60 1.0.000 - Added DPO & FUA bit support for WRITE_10 & WRITE_6 cdb
61 to disable drive write-cache before writes.
62 1.1.000 - Fixed performance bug with DPO & FUA not existing for WRITE_6.
63 1.2.000 - Added support for clean shutdown notification/feature table.
64 1.02.00.001 - Added support for full command packet posts through ioctls
65 for 3DM.
66 Bug fix so hot spare drives don't show up.
67 1.02.00.002 - Fix bug with tw_setfeature() call that caused oops on some
68 systems.
69 08/21/00 - release previously allocated resources on failure at
70 tw_allocate_memory (acme)
71 1.02.00.003 - Fix tw_interrupt() to report error to scsi layer when
72 controller status is non-zero.
73 Added handling of request_sense opcode.
74 Fix possible null pointer dereference in
75 tw_reset_device_extension()
76 1.02.00.004 - Add support for device id of 3ware 7000 series controllers.
77 Make tw_setfeature() call with interrupts disabled.
78 Register interrupt handler before enabling interrupts.
79 Clear attention interrupt before draining aen queue.
80 1.02.00.005 - Allocate bounce buffers and custom queue depth for raid5 for
81 6000 and 5000 series controllers.
82 Reduce polling mdelays causing problems on some systems.
83 Fix use_sg = 1 calculation bug.
84 Check for scsi_register returning NULL.
85 Add aen count to /proc/scsi/3w-xxxx.
86 Remove aen code unit masking in tw_aen_complete().
87 1.02.00.006 - Remove unit from printk in tw_scsi_eh_abort(), causing
88 possible oops.
89 Fix possible null pointer dereference in tw_scsi_queue()
90 if done function pointer was invalid.
91 1.02.00.007 - Fix possible null pointer dereferences in tw_ioctl().
92 Remove check for invalid done function pointer from
93 tw_scsi_queue().
94 1.02.00.008 - Set max sectors per io to TW_MAX_SECTORS in tw_findcards().
95 Add tw_decode_error() for printing readable error messages.
96 Print some useful information on certain aen codes.
97 Add tw_decode_bits() for interpreting status register output.
98 Make scsi_set_pci_device() for kernels >= 2.4.4
99 Fix bug where aen's could be lost before a reset.
100 Re-add spinlocks in tw_scsi_detect().
101 Fix possible null pointer dereference in tw_aen_drain_queue()
102 during initialization.
103 Clear pci parity errors during initialization and during io.
104 1.02.00.009 - Remove redundant increment in tw_state_request_start().
105 Add ioctl support for direct ATA command passthru.
106 Add entire aen code string list.
107 1.02.00.010 - Cleanup queueing code, fix jbod thoughput.
108 Fix get_param for specific units.
109 1.02.00.011 - Fix bug in tw_aen_complete() where aen's could be lost.
110 Fix tw_aen_drain_queue() to display useful info at init.
111 Set tw_host->max_id for 12 port cards.
112 Add ioctl support for raw command packet post from userspace
113 with sglist fragments (parameter and io).
114 1.02.00.012 - Fix read capacity to under report by 1 sector to fix get
115 last sector ioctl.
116 1.02.00.013 - Fix bug where more AEN codes weren't coming out during
117 driver initialization.
118 Improved handling of PCI aborts.
119 1.02.00.014 - Fix bug in tw_findcards() where AEN code could be lost.
120 Increase timeout in tw_aen_drain_queue() to 30 seconds.
121 1.02.00.015 - Re-write raw command post with data ioctl method.
122 Remove raid5 bounce buffers for raid5 for 6XXX for kernel 2.5
123 Add tw_map/unmap_scsi_sg/single_data() for kernel 2.5
124 Replace io_request_lock with host_lock for kernel 2.5
125 Set max_cmd_len to 16 for 3dm for kernel 2.5
126 1.02.00.016 - Set host->max_sectors back up to 256.
127 1.02.00.017 - Modified pci parity error handling/clearing from config space
128 during initialization.
129 1.02.00.018 - Better handling of request sense opcode and sense information
130 for failed commands. Add tw_decode_sense().
131 Replace all mdelay()'s with scsi_sleep().
132 1.02.00.019 - Revert mdelay's and scsi_sleep's, this caused problems on
133 some SMP systems.
134 1.02.00.020 - Add pci_set_dma_mask(), rewrite kmalloc()/virt_to_bus() to
135 pci_alloc/free_consistent().
136 Better alignment checking in tw_allocate_memory().
137 Cleanup tw_initialize_device_extension().
138 1.02.00.021 - Bump cmd_per_lun in SHT to 255 for better jbod performance.
139 Improve handling of errors in tw_interrupt().
140 Add handling/clearing of controller queue error.
141 Empty stale responses before draining aen queue.
142 Fix tw_scsi_eh_abort() to not reset on every io abort.
143 Set can_queue in SHT to 255 to prevent hang from AEN.
144 1.02.00.022 - Fix possible null pointer dereference in tw_scsi_release().
145 1.02.00.023 - Fix bug in tw_aen_drain_queue() where unit # was always zero.
146 1.02.00.024 - Add severity levels to AEN strings.
147 1.02.00.025 - Fix command interrupt spurious error messages.
148 Fix bug in raw command post with data ioctl method.
149 Fix bug where rollcall sometimes failed with cable errors.
150 Print unit # on all command timeouts.
151 1.02.00.026 - Fix possible infinite retry bug with power glitch induced
152 drive timeouts.
153 Cleanup some AEN severity levels.
154 1.02.00.027 - Add drive not supported AEN code for SATA controllers.
155 Remove spurious unknown ioctl error message.
156 1.02.00.028 - Fix bug where multiple controllers with no units were the
157 same card number.
158 Fix bug where cards were being shut down more than once.
159 1.02.00.029 - Add missing pci_free_consistent() in tw_allocate_memory().
160 Replace pci_map_single() with pci_map_page() for highmem.
161 Check for tw_setfeature() failure.
162 1.02.00.030 - Make driver 64-bit clean.
163 1.02.00.031 - Cleanup polling timeouts/routines in several places.
164 Add support for mode sense opcode.
165 Add support for cache mode page.
166 Add support for synchronize cache opcode.
167 1.02.00.032 - Fix small multicard rollcall bug.
168 Make driver stay loaded with no units for hot add/swap.
169 Add support for "twe" character device for ioctls.
170 Clean up request_id queueing code.
171 Fix tw_scsi_queue() spinlocks.
172 1.02.00.033 - Fix tw_aen_complete() to not queue 'queue empty' AEN's.
173 Initialize queues correctly when loading with no valid units.
174 1.02.00.034 - Fix tw_decode_bits() to handle multiple errors.
175 Add support for user configurable cmd_per_lun.
176 Add support for sht->slave_configure().
177 1.02.00.035 - Improve tw_allocate_memory() memory allocation.
178 Fix tw_chrdev_ioctl() to sleep correctly.
179 1.02.00.036 - Increase character ioctl timeout to 60 seconds.
180 1.02.00.037 - Fix tw_ioctl() to handle all non-data ATA passthru cmds
181 for 'smartmontools' support.
182 1.26.00.038 - Roll driver minor version to 26 to denote kernel 2.6.
183 Add support for cmds_per_lun module parameter.
184 1.26.00.039 - Fix bug in tw_chrdev_ioctl() polling code.
185 Fix data_buffer_length usage in tw_chrdev_ioctl().
186 Update contact information.
187 1.26.02.000 - Convert driver to pci_driver format.
188 1.26.02.001 - Increase max ioctl buffer size to 512 sectors.
189 Make tw_scsi_queue() return 0 for 'Unknown scsi opcode'.
190 Fix tw_remove() to free irq handler/unregister_chrdev()
191 before shutting down card.
192 Change to new 'change_queue_depth' api.
193 Fix 'handled=1' ISR usage, remove bogus IRQ check.
194 1.26.02.002 - Free irq handler in __tw_shutdown().
195 Turn on RCD bit for caching mode page.
196 Serialize reset code.
197 */
198
199 #include <linux/module.h>
200 #include <linux/reboot.h>
201 #include <linux/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 scsi_dma_unmap(cmd);
1298 } /* End tw_unmap_scsi_data() */
1299
1300 /* This function will reset a device extension */
1301 static int tw_reset_device_extension(TW_Device_Extension *tw_dev)
1302 {
1303 int i = 0;
1304 struct scsi_cmnd *srb;
1305 unsigned long flags = 0;
1306
1307 dprintk(KERN_NOTICE "3w-xxxx: tw_reset_device_extension()\n");
1308
1309 set_bit(TW_IN_RESET, &tw_dev->flags);
1310 TW_DISABLE_INTERRUPTS(tw_dev);
1311 TW_MASK_COMMAND_INTERRUPT(tw_dev);
1312 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1313
1314 /* Abort all requests that are in progress */
1315 for (i=0;i<TW_Q_LENGTH;i++) {
1316 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1317 (tw_dev->state[i] != TW_S_INITIAL) &&
1318 (tw_dev->state[i] != TW_S_COMPLETED)) {
1319 srb = tw_dev->srb[i];
1320 if (srb != NULL) {
1321 srb->result = (DID_RESET << 16);
1322 tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);
1323 tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[i]);
1324 }
1325 }
1326 }
1327
1328 /* Reset queues and counts */
1329 for (i=0;i<TW_Q_LENGTH;i++) {
1330 tw_dev->free_queue[i] = i;
1331 tw_dev->state[i] = TW_S_INITIAL;
1332 }
1333 tw_dev->free_head = TW_Q_START;
1334 tw_dev->free_tail = TW_Q_START;
1335 tw_dev->posted_request_count = 0;
1336 tw_dev->pending_request_count = 0;
1337 tw_dev->pending_head = TW_Q_START;
1338 tw_dev->pending_tail = TW_Q_START;
1339 tw_dev->reset_print = 0;
1340
1341 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1342
1343 if (tw_reset_sequence(tw_dev)) {
1344 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset sequence failed.\n", tw_dev->host->host_no);
1345 return 1;
1346 }
1347
1348 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
1349 clear_bit(TW_IN_RESET, &tw_dev->flags);
1350 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1351
1352 return 0;
1353 } /* End tw_reset_device_extension() */
1354
1355 /* This funciton returns unit geometry in cylinders/heads/sectors */
1356 static int tw_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev,
1357 sector_t capacity, int geom[])
1358 {
1359 int heads, sectors, cylinders;
1360 TW_Device_Extension *tw_dev;
1361
1362 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam()\n");
1363 tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
1364
1365 heads = 64;
1366 sectors = 32;
1367 cylinders = sector_div(capacity, heads * sectors);
1368
1369 if (capacity >= 0x200000) {
1370 heads = 255;
1371 sectors = 63;
1372 cylinders = sector_div(capacity, heads * sectors);
1373 }
1374
1375 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam(): heads = %d, sectors = %d, cylinders = %d\n", heads, sectors, cylinders);
1376 geom[0] = heads;
1377 geom[1] = sectors;
1378 geom[2] = cylinders;
1379
1380 return 0;
1381 } /* End tw_scsi_biosparam() */
1382
1383 /* This is the new scsi eh reset function */
1384 static int tw_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1385 {
1386 TW_Device_Extension *tw_dev=NULL;
1387 int retval = FAILED;
1388
1389 tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1390
1391 tw_dev->num_resets++;
1392
1393 sdev_printk(KERN_WARNING, SCpnt->device,
1394 "WARNING: Command (0x%x) timed out, resetting card.\n",
1395 SCpnt->cmnd[0]);
1396
1397 /* Make sure we are not issuing an ioctl or resetting from ioctl */
1398 mutex_lock(&tw_dev->ioctl_lock);
1399
1400 /* Now reset the card and some of the device extension data */
1401 if (tw_reset_device_extension(tw_dev)) {
1402 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset failed.\n", tw_dev->host->host_no);
1403 goto out;
1404 }
1405
1406 retval = SUCCESS;
1407 out:
1408 mutex_unlock(&tw_dev->ioctl_lock);
1409 return retval;
1410 } /* End tw_scsi_eh_reset() */
1411
1412 /* This function handles scsi inquiry commands */
1413 static int tw_scsiop_inquiry(TW_Device_Extension *tw_dev, int request_id)
1414 {
1415 TW_Param *param;
1416 TW_Command *command_packet;
1417 unsigned long command_que_value;
1418 unsigned long param_value;
1419
1420 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry()\n");
1421
1422 /* Initialize command packet */
1423 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1424 if (command_packet == NULL) {
1425 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet virtual address.\n");
1426 return 1;
1427 }
1428 memset(command_packet, 0, sizeof(TW_Sector));
1429 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1430 command_packet->size = 4;
1431 command_packet->request_id = request_id;
1432 command_packet->status = 0;
1433 command_packet->flags = 0;
1434 command_packet->byte6.parameter_count = 1;
1435
1436 /* Now setup the param */
1437 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1438 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment virtual address.\n");
1439 return 1;
1440 }
1441 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1442 memset(param, 0, sizeof(TW_Sector));
1443 param->table_id = 3; /* unit summary table */
1444 param->parameter_id = 3; /* unitsstatus parameter */
1445 param->parameter_size_bytes = TW_MAX_UNITS;
1446 param_value = tw_dev->alignment_physical_address[request_id];
1447 if (param_value == 0) {
1448 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment physical address.\n");
1449 return 1;
1450 }
1451
1452 command_packet->byte8.param.sgl[0].address = param_value;
1453 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1454 command_que_value = tw_dev->command_packet_physical_address[request_id];
1455 if (command_que_value == 0) {
1456 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet physical address.\n");
1457 return 1;
1458 }
1459
1460 /* Now try to post the command packet */
1461 tw_post_command_packet(tw_dev, request_id);
1462
1463 return 0;
1464 } /* End tw_scsiop_inquiry() */
1465
1466 static void tw_transfer_internal(TW_Device_Extension *tw_dev, int request_id,
1467 void *data, unsigned int len)
1468 {
1469 scsi_sg_copy_from_buffer(tw_dev->srb[request_id], data, len);
1470 }
1471
1472 /* This function is called by the isr to complete an inquiry command */
1473 static int tw_scsiop_inquiry_complete(TW_Device_Extension *tw_dev, int request_id)
1474 {
1475 unsigned char *is_unit_present;
1476 unsigned char request_buffer[36];
1477 TW_Param *param;
1478
1479 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry_complete()\n");
1480
1481 memset(request_buffer, 0, sizeof(request_buffer));
1482 request_buffer[0] = TYPE_DISK; /* Peripheral device type */
1483 request_buffer[1] = 0; /* Device type modifier */
1484 request_buffer[2] = 0; /* No ansi/iso compliance */
1485 request_buffer[4] = 31; /* Additional length */
1486 memcpy(&request_buffer[8], "3ware ", 8); /* Vendor ID */
1487 sprintf(&request_buffer[16], "Logical Disk %-2d ", tw_dev->srb[request_id]->device->id);
1488 memcpy(&request_buffer[32], TW_DRIVER_VERSION, 3);
1489 tw_transfer_internal(tw_dev, request_id, request_buffer,
1490 sizeof(request_buffer));
1491
1492 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1493 if (param == NULL) {
1494 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry_complete(): Bad alignment virtual address.\n");
1495 return 1;
1496 }
1497 is_unit_present = &(param->data[0]);
1498
1499 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1500 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1501 } else {
1502 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1503 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1504 return TW_ISR_DONT_RESULT;
1505 }
1506
1507 return 0;
1508 } /* End tw_scsiop_inquiry_complete() */
1509
1510 /* This function handles scsi mode_sense commands */
1511 static int tw_scsiop_mode_sense(TW_Device_Extension *tw_dev, int request_id)
1512 {
1513 TW_Param *param;
1514 TW_Command *command_packet;
1515 unsigned long command_que_value;
1516 unsigned long param_value;
1517
1518 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense()\n");
1519
1520 /* Only page control = 0, page code = 0x8 (cache page) supported */
1521 if (tw_dev->srb[request_id]->cmnd[2] != 0x8) {
1522 tw_dev->state[request_id] = TW_S_COMPLETED;
1523 tw_state_request_finish(tw_dev, request_id);
1524 tw_dev->srb[request_id]->result = (DID_OK << 16);
1525 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1526 return 0;
1527 }
1528
1529 /* Now read firmware cache setting for this unit */
1530 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1531 if (command_packet == NULL) {
1532 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet virtual address.\n");
1533 return 1;
1534 }
1535
1536 /* Setup the command packet */
1537 memset(command_packet, 0, sizeof(TW_Sector));
1538 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1539 command_packet->size = 4;
1540 command_packet->request_id = request_id;
1541 command_packet->status = 0;
1542 command_packet->flags = 0;
1543 command_packet->byte6.parameter_count = 1;
1544
1545 /* Setup the param */
1546 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1547 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment virtual address.\n");
1548 return 1;
1549 }
1550
1551 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1552 memset(param, 0, sizeof(TW_Sector));
1553 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE + tw_dev->srb[request_id]->device->id;
1554 param->parameter_id = 7; /* unit flags */
1555 param->parameter_size_bytes = 1;
1556 param_value = tw_dev->alignment_physical_address[request_id];
1557 if (param_value == 0) {
1558 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment physical address.\n");
1559 return 1;
1560 }
1561
1562 command_packet->byte8.param.sgl[0].address = param_value;
1563 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1564 command_que_value = tw_dev->command_packet_physical_address[request_id];
1565 if (command_que_value == 0) {
1566 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet physical address.\n");
1567 return 1;
1568 }
1569
1570 /* Now try to post the command packet */
1571 tw_post_command_packet(tw_dev, request_id);
1572
1573 return 0;
1574 } /* End tw_scsiop_mode_sense() */
1575
1576 /* This function is called by the isr to complete a mode sense command */
1577 static int tw_scsiop_mode_sense_complete(TW_Device_Extension *tw_dev, int request_id)
1578 {
1579 TW_Param *param;
1580 unsigned char *flags;
1581 unsigned char request_buffer[8];
1582
1583 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense_complete()\n");
1584
1585 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1586 if (param == NULL) {
1587 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense_complete(): Bad alignment virtual address.\n");
1588 return 1;
1589 }
1590 flags = (char *)&(param->data[0]);
1591 memset(request_buffer, 0, sizeof(request_buffer));
1592
1593 request_buffer[0] = 0xf; /* mode data length */
1594 request_buffer[1] = 0; /* default medium type */
1595 request_buffer[2] = 0x10; /* dpo/fua support on */
1596 request_buffer[3] = 0; /* no block descriptors */
1597 request_buffer[4] = 0x8; /* caching page */
1598 request_buffer[5] = 0xa; /* page length */
1599 if (*flags & 0x1)
1600 request_buffer[6] = 0x5; /* WCE on, RCD on */
1601 else
1602 request_buffer[6] = 0x1; /* WCE off, RCD on */
1603 tw_transfer_internal(tw_dev, request_id, request_buffer,
1604 sizeof(request_buffer));
1605
1606 return 0;
1607 } /* End tw_scsiop_mode_sense_complete() */
1608
1609 /* This function handles scsi read_capacity commands */
1610 static int tw_scsiop_read_capacity(TW_Device_Extension *tw_dev, int request_id)
1611 {
1612 TW_Param *param;
1613 TW_Command *command_packet;
1614 unsigned long command_que_value;
1615 unsigned long param_value;
1616
1617 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity()\n");
1618
1619 /* Initialize command packet */
1620 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1621
1622 if (command_packet == NULL) {
1623 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet virtual address.\n");
1624 return 1;
1625 }
1626 memset(command_packet, 0, sizeof(TW_Sector));
1627 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1628 command_packet->size = 4;
1629 command_packet->request_id = request_id;
1630 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1631 command_packet->status = 0;
1632 command_packet->flags = 0;
1633 command_packet->byte6.block_count = 1;
1634
1635 /* Now setup the param */
1636 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1637 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment virtual address.\n");
1638 return 1;
1639 }
1640 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1641 memset(param, 0, sizeof(TW_Sector));
1642 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE +
1643 tw_dev->srb[request_id]->device->id;
1644 param->parameter_id = 4; /* unitcapacity parameter */
1645 param->parameter_size_bytes = 4;
1646 param_value = tw_dev->alignment_physical_address[request_id];
1647 if (param_value == 0) {
1648 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment physical address.\n");
1649 return 1;
1650 }
1651
1652 command_packet->byte8.param.sgl[0].address = param_value;
1653 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1654 command_que_value = tw_dev->command_packet_physical_address[request_id];
1655 if (command_que_value == 0) {
1656 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet physical address.\n");
1657 return 1;
1658 }
1659
1660 /* Now try to post the command to the board */
1661 tw_post_command_packet(tw_dev, request_id);
1662
1663 return 0;
1664 } /* End tw_scsiop_read_capacity() */
1665
1666 /* This function is called by the isr to complete a readcapacity command */
1667 static int tw_scsiop_read_capacity_complete(TW_Device_Extension *tw_dev, int request_id)
1668 {
1669 unsigned char *param_data;
1670 u32 capacity;
1671 char buff[8];
1672 TW_Param *param;
1673
1674 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete()\n");
1675
1676 memset(buff, 0, sizeof(buff));
1677 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1678 if (param == NULL) {
1679 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_capacity_complete(): Bad alignment virtual address.\n");
1680 return 1;
1681 }
1682 param_data = &(param->data[0]);
1683
1684 capacity = (param_data[3] << 24) | (param_data[2] << 16) |
1685 (param_data[1] << 8) | param_data[0];
1686
1687 /* Subtract one sector to fix get last sector ioctl */
1688 capacity -= 1;
1689
1690 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete(): Capacity = 0x%x.\n", capacity);
1691
1692 /* Number of LBA's */
1693 buff[0] = (capacity >> 24);
1694 buff[1] = (capacity >> 16) & 0xff;
1695 buff[2] = (capacity >> 8) & 0xff;
1696 buff[3] = capacity & 0xff;
1697
1698 /* Block size in bytes (512) */
1699 buff[4] = (TW_BLOCK_SIZE >> 24);
1700 buff[5] = (TW_BLOCK_SIZE >> 16) & 0xff;
1701 buff[6] = (TW_BLOCK_SIZE >> 8) & 0xff;
1702 buff[7] = TW_BLOCK_SIZE & 0xff;
1703
1704 tw_transfer_internal(tw_dev, request_id, buff, sizeof(buff));
1705
1706 return 0;
1707 } /* End tw_scsiop_read_capacity_complete() */
1708
1709 /* This function handles scsi read or write commands */
1710 static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id)
1711 {
1712 TW_Command *command_packet;
1713 unsigned long command_que_value;
1714 u32 lba = 0x0, num_sectors = 0x0;
1715 int i, use_sg;
1716 struct scsi_cmnd *srb;
1717 struct scatterlist *sglist, *sg;
1718
1719 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write()\n");
1720
1721 srb = tw_dev->srb[request_id];
1722
1723 sglist = scsi_sglist(srb);
1724 if (!sglist) {
1725 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Request buffer NULL.\n");
1726 return 1;
1727 }
1728
1729 /* Initialize command packet */
1730 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1731 if (command_packet == NULL) {
1732 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): Bad command packet virtual address.\n");
1733 return 1;
1734 }
1735
1736 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == READ_10) {
1737 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_READ);
1738 } else {
1739 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_WRITE);
1740 }
1741
1742 command_packet->size = 3;
1743 command_packet->request_id = request_id;
1744 command_packet->unit__hostid = TW_UNITHOST_IN(0, srb->device->id);
1745 command_packet->status = 0;
1746 command_packet->flags = 0;
1747
1748 if (srb->cmnd[0] == WRITE_10) {
1749 if ((srb->cmnd[1] & 0x8) || (srb->cmnd[1] & 0x10))
1750 command_packet->flags = 1;
1751 }
1752
1753 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6) {
1754 lba = ((u32)srb->cmnd[1] << 16) | ((u32)srb->cmnd[2] << 8) | (u32)srb->cmnd[3];
1755 num_sectors = (u32)srb->cmnd[4];
1756 } else {
1757 lba = ((u32)srb->cmnd[2] << 24) | ((u32)srb->cmnd[3] << 16) | ((u32)srb->cmnd[4] << 8) | (u32)srb->cmnd[5];
1758 num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
1759 }
1760
1761 /* Update sector statistic */
1762 tw_dev->sector_count = num_sectors;
1763 if (tw_dev->sector_count > tw_dev->max_sector_count)
1764 tw_dev->max_sector_count = tw_dev->sector_count;
1765
1766 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): lba = 0x%x num_sectors = 0x%x\n", lba, num_sectors);
1767 command_packet->byte8.io.lba = lba;
1768 command_packet->byte6.block_count = num_sectors;
1769
1770 use_sg = tw_map_scsi_sg_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
1771 if (!use_sg)
1772 return 1;
1773
1774 scsi_for_each_sg(tw_dev->srb[request_id], sg, use_sg, i) {
1775 command_packet->byte8.io.sgl[i].address = sg_dma_address(sg);
1776 command_packet->byte8.io.sgl[i].length = sg_dma_len(sg);
1777 command_packet->size+=2;
1778 }
1779
1780 /* Update SG statistics */
1781 tw_dev->sgl_entries = scsi_sg_count(tw_dev->srb[request_id]);
1782 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
1783 tw_dev->max_sgl_entries = tw_dev->sgl_entries;
1784
1785 command_que_value = tw_dev->command_packet_physical_address[request_id];
1786 if (command_que_value == 0) {
1787 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Bad command packet physical address.\n");
1788 return 1;
1789 }
1790
1791 /* Now try to post the command to the board */
1792 tw_post_command_packet(tw_dev, request_id);
1793
1794 return 0;
1795 } /* End tw_scsiop_read_write() */
1796
1797 /* This function will handle the request sense scsi command */
1798 static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id)
1799 {
1800 char request_buffer[18];
1801
1802 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n");
1803
1804 memset(request_buffer, 0, sizeof(request_buffer));
1805 request_buffer[0] = 0x70; /* Immediate fixed format */
1806 request_buffer[7] = 10; /* minimum size per SPC: 18 bytes */
1807 /* leave all other fields zero, giving effectively NO_SENSE return */
1808 tw_transfer_internal(tw_dev, request_id, request_buffer,
1809 sizeof(request_buffer));
1810
1811 tw_dev->state[request_id] = TW_S_COMPLETED;
1812 tw_state_request_finish(tw_dev, request_id);
1813
1814 /* If we got a request_sense, we probably want a reset, return error */
1815 tw_dev->srb[request_id]->result = (DID_ERROR << 16);
1816 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1817
1818 return 0;
1819 } /* End tw_scsiop_request_sense() */
1820
1821 /* This function will handle synchronize cache scsi command */
1822 static int tw_scsiop_synchronize_cache(TW_Device_Extension *tw_dev, int request_id)
1823 {
1824 TW_Command *command_packet;
1825 unsigned long command_que_value;
1826
1827 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_synchronize_cache()\n");
1828
1829 /* Send firmware flush command for this unit */
1830 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1831 if (command_packet == NULL) {
1832 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet virtual address.\n");
1833 return 1;
1834 }
1835
1836 /* Setup the command packet */
1837 memset(command_packet, 0, sizeof(TW_Sector));
1838 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_FLUSH_CACHE);
1839 command_packet->size = 2;
1840 command_packet->request_id = request_id;
1841 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1842 command_packet->status = 0;
1843 command_packet->flags = 0;
1844 command_packet->byte6.parameter_count = 1;
1845 command_que_value = tw_dev->command_packet_physical_address[request_id];
1846 if (command_que_value == 0) {
1847 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet physical address.\n");
1848 return 1;
1849 }
1850
1851 /* Now try to post the command packet */
1852 tw_post_command_packet(tw_dev, request_id);
1853
1854 return 0;
1855 } /* End tw_scsiop_synchronize_cache() */
1856
1857 /* This function will handle test unit ready scsi command */
1858 static int tw_scsiop_test_unit_ready(TW_Device_Extension *tw_dev, int request_id)
1859 {
1860 TW_Param *param;
1861 TW_Command *command_packet;
1862 unsigned long command_que_value;
1863 unsigned long param_value;
1864
1865 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_test_unit_ready()\n");
1866
1867 /* Initialize command packet */
1868 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1869 if (command_packet == NULL) {
1870 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet virtual address.\n");
1871 return 1;
1872 }
1873 memset(command_packet, 0, sizeof(TW_Sector));
1874 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1875 command_packet->size = 4;
1876 command_packet->request_id = request_id;
1877 command_packet->status = 0;
1878 command_packet->flags = 0;
1879 command_packet->byte6.parameter_count = 1;
1880
1881 /* Now setup the param */
1882 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1883 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment virtual address.\n");
1884 return 1;
1885 }
1886 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1887 memset(param, 0, sizeof(TW_Sector));
1888 param->table_id = 3; /* unit summary table */
1889 param->parameter_id = 3; /* unitsstatus parameter */
1890 param->parameter_size_bytes = TW_MAX_UNITS;
1891 param_value = tw_dev->alignment_physical_address[request_id];
1892 if (param_value == 0) {
1893 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment physical address.\n");
1894 return 1;
1895 }
1896
1897 command_packet->byte8.param.sgl[0].address = param_value;
1898 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1899 command_que_value = tw_dev->command_packet_physical_address[request_id];
1900 if (command_que_value == 0) {
1901 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet physical address.\n");
1902 return 1;
1903 }
1904
1905 /* Now try to post the command packet */
1906 tw_post_command_packet(tw_dev, request_id);
1907
1908 return 0;
1909 } /* End tw_scsiop_test_unit_ready() */
1910
1911 /* This function is called by the isr to complete a testunitready command */
1912 static int tw_scsiop_test_unit_ready_complete(TW_Device_Extension *tw_dev, int request_id)
1913 {
1914 unsigned char *is_unit_present;
1915 TW_Param *param;
1916
1917 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete()\n");
1918
1919 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1920 if (param == NULL) {
1921 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete(): Bad alignment virtual address.\n");
1922 return 1;
1923 }
1924 is_unit_present = &(param->data[0]);
1925
1926 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1927 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1928 } else {
1929 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1930 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1931 return TW_ISR_DONT_RESULT;
1932 }
1933
1934 return 0;
1935 } /* End tw_scsiop_test_unit_ready_complete() */
1936
1937 /* This is the main scsi queue function to handle scsi opcodes */
1938 static int tw_scsi_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
1939 {
1940 unsigned char *command = SCpnt->cmnd;
1941 int request_id = 0;
1942 int retval = 1;
1943 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1944
1945 /* If we are resetting due to timed out ioctl, report as busy */
1946 if (test_bit(TW_IN_RESET, &tw_dev->flags))
1947 return SCSI_MLQUEUE_HOST_BUSY;
1948
1949 /* Save done function into Scsi_Cmnd struct */
1950 SCpnt->scsi_done = done;
1951
1952 /* Queue the command and get a request id */
1953 tw_state_request_start(tw_dev, &request_id);
1954
1955 /* Save the scsi command for use by the ISR */
1956 tw_dev->srb[request_id] = SCpnt;
1957
1958 /* Initialize phase to zero */
1959 SCpnt->SCp.phase = TW_PHASE_INITIAL;
1960
1961 switch (*command) {
1962 case READ_10:
1963 case READ_6:
1964 case WRITE_10:
1965 case WRITE_6:
1966 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ/WRITE.\n");
1967 retval = tw_scsiop_read_write(tw_dev, request_id);
1968 break;
1969 case TEST_UNIT_READY:
1970 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught TEST_UNIT_READY.\n");
1971 retval = tw_scsiop_test_unit_ready(tw_dev, request_id);
1972 break;
1973 case INQUIRY:
1974 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught INQUIRY.\n");
1975 retval = tw_scsiop_inquiry(tw_dev, request_id);
1976 break;
1977 case READ_CAPACITY:
1978 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ_CAPACITY.\n");
1979 retval = tw_scsiop_read_capacity(tw_dev, request_id);
1980 break;
1981 case REQUEST_SENSE:
1982 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught REQUEST_SENSE.\n");
1983 retval = tw_scsiop_request_sense(tw_dev, request_id);
1984 break;
1985 case MODE_SENSE:
1986 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught MODE_SENSE.\n");
1987 retval = tw_scsiop_mode_sense(tw_dev, request_id);
1988 break;
1989 case SYNCHRONIZE_CACHE:
1990 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught SYNCHRONIZE_CACHE.\n");
1991 retval = tw_scsiop_synchronize_cache(tw_dev, request_id);
1992 break;
1993 case TW_IOCTL:
1994 printk(KERN_WARNING "3w-xxxx: SCSI_IOCTL_SEND_COMMAND deprecated, please update your 3ware tools.\n");
1995 break;
1996 default:
1997 printk(KERN_NOTICE "3w-xxxx: scsi%d: Unknown scsi opcode: 0x%x\n", tw_dev->host->host_no, *command);
1998 tw_dev->state[request_id] = TW_S_COMPLETED;
1999 tw_state_request_finish(tw_dev, request_id);
2000 SCpnt->result = (DID_BAD_TARGET << 16);
2001 done(SCpnt);
2002 retval = 0;
2003 }
2004 if (retval) {
2005 tw_dev->state[request_id] = TW_S_COMPLETED;
2006 tw_state_request_finish(tw_dev, request_id);
2007 SCpnt->result = (DID_ERROR << 16);
2008 done(SCpnt);
2009 retval = 0;
2010 }
2011 return retval;
2012 } /* End tw_scsi_queue() */
2013
2014 /* This function is the interrupt service routine */
2015 static irqreturn_t tw_interrupt(int irq, void *dev_instance)
2016 {
2017 int request_id;
2018 u32 status_reg_value;
2019 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
2020 TW_Response_Queue response_que;
2021 int error = 0, retval = 0;
2022 TW_Command *command_packet;
2023 int handled = 0;
2024
2025 /* Get the host lock for io completions */
2026 spin_lock(tw_dev->host->host_lock);
2027
2028 /* Read the registers */
2029 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2030
2031 /* Check if this is our interrupt, otherwise bail */
2032 if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
2033 goto tw_interrupt_bail;
2034
2035 handled = 1;
2036
2037 /* If we are resetting, bail */
2038 if (test_bit(TW_IN_RESET, &tw_dev->flags))
2039 goto tw_interrupt_bail;
2040
2041 /* Check controller for errors */
2042 if (tw_check_bits(status_reg_value)) {
2043 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2044 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2045 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2046 goto tw_interrupt_bail;
2047 }
2048 }
2049
2050 /* Handle host interrupt */
2051 if (status_reg_value & TW_STATUS_HOST_INTERRUPT) {
2052 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received host interrupt.\n");
2053 TW_CLEAR_HOST_INTERRUPT(tw_dev);
2054 }
2055
2056 /* Handle attention interrupt */
2057 if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
2058 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received attention interrupt.\n");
2059 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
2060 tw_state_request_start(tw_dev, &request_id);
2061 error = tw_aen_read_queue(tw_dev, request_id);
2062 if (error) {
2063 printk(KERN_WARNING "3w-xxxx: scsi%d: Error reading aen queue.\n", tw_dev->host->host_no);
2064 tw_dev->state[request_id] = TW_S_COMPLETED;
2065 tw_state_request_finish(tw_dev, request_id);
2066 }
2067 }
2068
2069 /* Handle command interrupt */
2070 if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
2071 /* Drain as many pending commands as we can */
2072 while (tw_dev->pending_request_count > 0) {
2073 request_id = tw_dev->pending_queue[tw_dev->pending_head];
2074 if (tw_dev->state[request_id] != TW_S_PENDING) {
2075 printk(KERN_WARNING "3w-xxxx: scsi%d: Found request id that wasn't pending.\n", tw_dev->host->host_no);
2076 break;
2077 }
2078 if (tw_post_command_packet(tw_dev, request_id)==0) {
2079 if (tw_dev->pending_head == TW_Q_LENGTH-1) {
2080 tw_dev->pending_head = TW_Q_START;
2081 } else {
2082 tw_dev->pending_head = tw_dev->pending_head + 1;
2083 }
2084 tw_dev->pending_request_count--;
2085 } else {
2086 /* If we get here, we will continue re-posting on the next command interrupt */
2087 break;
2088 }
2089 }
2090 /* If there are no more pending requests, we mask command interrupt */
2091 if (tw_dev->pending_request_count == 0)
2092 TW_MASK_COMMAND_INTERRUPT(tw_dev);
2093 }
2094
2095 /* Handle response interrupt */
2096 if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
2097 /* Drain the response queue from the board */
2098 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
2099 /* Read response queue register */
2100 response_que.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
2101 request_id = TW_RESID_OUT(response_que.response_id);
2102 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
2103 error = 0;
2104
2105 /* Check for bad response */
2106 if (command_packet->status != 0) {
2107 /* If internal command, don't error, don't fill sense */
2108 if (tw_dev->srb[request_id] == NULL) {
2109 tw_decode_sense(tw_dev, request_id, 0);
2110 } else {
2111 error = tw_decode_sense(tw_dev, request_id, 1);
2112 }
2113 }
2114
2115 /* Check for correct state */
2116 if (tw_dev->state[request_id] != TW_S_POSTED) {
2117 if (tw_dev->srb[request_id] != NULL) {
2118 printk(KERN_WARNING "3w-xxxx: scsi%d: Received a request id that wasn't posted.\n", tw_dev->host->host_no);
2119 error = 1;
2120 }
2121 }
2122
2123 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Response queue request id: %d.\n", request_id);
2124
2125 /* Check for internal command completion */
2126 if (tw_dev->srb[request_id] == NULL) {
2127 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Found internally posted command.\n");
2128 /* Check for chrdev ioctl completion */
2129 if (request_id != tw_dev->chrdev_request_id) {
2130 retval = tw_aen_complete(tw_dev, request_id);
2131 if (retval) {
2132 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing aen.\n", tw_dev->host->host_no);
2133 }
2134 } else {
2135 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
2136 wake_up(&tw_dev->ioctl_wqueue);
2137 }
2138 } else {
2139 switch (tw_dev->srb[request_id]->cmnd[0]) {
2140 case READ_10:
2141 case READ_6:
2142 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_10/READ_6\n");
2143 break;
2144 case WRITE_10:
2145 case WRITE_6:
2146 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught WRITE_10/WRITE_6\n");
2147 break;
2148 case TEST_UNIT_READY:
2149 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught TEST_UNIT_READY\n");
2150 error = tw_scsiop_test_unit_ready_complete(tw_dev, request_id);
2151 break;
2152 case INQUIRY:
2153 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught INQUIRY\n");
2154 error = tw_scsiop_inquiry_complete(tw_dev, request_id);
2155 break;
2156 case READ_CAPACITY:
2157 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_CAPACITY\n");
2158 error = tw_scsiop_read_capacity_complete(tw_dev, request_id);
2159 break;
2160 case MODE_SENSE:
2161 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught MODE_SENSE\n");
2162 error = tw_scsiop_mode_sense_complete(tw_dev, request_id);
2163 break;
2164 case SYNCHRONIZE_CACHE:
2165 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught SYNCHRONIZE_CACHE\n");
2166 break;
2167 default:
2168 printk(KERN_WARNING "3w-xxxx: case slip in tw_interrupt()\n");
2169 error = 1;
2170 }
2171
2172 /* If no error command was a success */
2173 if (error == 0) {
2174 tw_dev->srb[request_id]->result = (DID_OK << 16);
2175 }
2176
2177 /* If error, command failed */
2178 if (error == 1) {
2179 /* Ask for a host reset */
2180 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
2181 }
2182
2183 /* Now complete the io */
2184 if ((error != TW_ISR_DONT_COMPLETE)) {
2185 tw_dev->state[request_id] = TW_S_COMPLETED;
2186 tw_state_request_finish(tw_dev, request_id);
2187 tw_dev->posted_request_count--;
2188 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
2189
2190 tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
2191 }
2192 }
2193
2194 /* Check for valid status after each drain */
2195 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2196 if (tw_check_bits(status_reg_value)) {
2197 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2198 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2199 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2200 goto tw_interrupt_bail;
2201 }
2202 }
2203 }
2204 }
2205
2206 tw_interrupt_bail:
2207 spin_unlock(tw_dev->host->host_lock);
2208 return IRQ_RETVAL(handled);
2209 } /* End tw_interrupt() */
2210
2211 /* This function tells the controller to shut down */
2212 static void __tw_shutdown(TW_Device_Extension *tw_dev)
2213 {
2214 /* Disable interrupts */
2215 TW_DISABLE_INTERRUPTS(tw_dev);
2216
2217 /* Free up the IRQ */
2218 free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
2219
2220 printk(KERN_WARNING "3w-xxxx: Shutting down host %d.\n", tw_dev->host->host_no);
2221
2222 /* Tell the card we are shutting down */
2223 if (tw_initconnection(tw_dev, 1)) {
2224 printk(KERN_WARNING "3w-xxxx: Connection shutdown failed.\n");
2225 } else {
2226 printk(KERN_WARNING "3w-xxxx: Shutdown complete.\n");
2227 }
2228
2229 /* Clear all interrupts just before exit */
2230 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2231 } /* End __tw_shutdown() */
2232
2233 /* Wrapper for __tw_shutdown */
2234 static void tw_shutdown(struct pci_dev *pdev)
2235 {
2236 struct Scsi_Host *host = pci_get_drvdata(pdev);
2237 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2238
2239 __tw_shutdown(tw_dev);
2240 } /* End tw_shutdown() */
2241
2242 static struct scsi_host_template driver_template = {
2243 .module = THIS_MODULE,
2244 .name = "3ware Storage Controller",
2245 .queuecommand = tw_scsi_queue,
2246 .eh_host_reset_handler = tw_scsi_eh_reset,
2247 .bios_param = tw_scsi_biosparam,
2248 .change_queue_depth = tw_change_queue_depth,
2249 .can_queue = TW_Q_LENGTH-2,
2250 .this_id = -1,
2251 .sg_tablesize = TW_MAX_SGL_LENGTH,
2252 .max_sectors = TW_MAX_SECTORS,
2253 .cmd_per_lun = TW_MAX_CMDS_PER_LUN,
2254 .use_clustering = ENABLE_CLUSTERING,
2255 .shost_attrs = tw_host_attrs,
2256 .emulated = 1
2257 };
2258
2259 /* This function will probe and initialize a card */
2260 static int __devinit tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
2261 {
2262 struct Scsi_Host *host = NULL;
2263 TW_Device_Extension *tw_dev;
2264 int retval = -ENODEV;
2265
2266 retval = pci_enable_device(pdev);
2267 if (retval) {
2268 printk(KERN_WARNING "3w-xxxx: Failed to enable pci device.");
2269 goto out_disable_device;
2270 }
2271
2272 pci_set_master(pdev);
2273
2274 retval = pci_set_dma_mask(pdev, TW_DMA_MASK);
2275 if (retval) {
2276 printk(KERN_WARNING "3w-xxxx: Failed to set dma mask.");
2277 goto out_disable_device;
2278 }
2279
2280 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2281 if (!host) {
2282 printk(KERN_WARNING "3w-xxxx: Failed to allocate memory for device extension.");
2283 retval = -ENOMEM;
2284 goto out_disable_device;
2285 }
2286 tw_dev = (TW_Device_Extension *)host->hostdata;
2287
2288 /* Save values to device extension */
2289 tw_dev->host = host;
2290 tw_dev->tw_pci_dev = pdev;
2291
2292 if (tw_initialize_device_extension(tw_dev)) {
2293 printk(KERN_WARNING "3w-xxxx: Failed to initialize device extension.");
2294 goto out_free_device_extension;
2295 }
2296
2297 /* Request IO regions */
2298 retval = pci_request_regions(pdev, "3w-xxxx");
2299 if (retval) {
2300 printk(KERN_WARNING "3w-xxxx: Failed to get mem region.");
2301 goto out_free_device_extension;
2302 }
2303
2304 /* Save base address */
2305 tw_dev->base_addr = pci_resource_start(pdev, 0);
2306 if (!tw_dev->base_addr) {
2307 printk(KERN_WARNING "3w-xxxx: Failed to get io address.");
2308 goto out_release_mem_region;
2309 }
2310
2311 /* Disable interrupts on the card */
2312 TW_DISABLE_INTERRUPTS(tw_dev);
2313
2314 /* Initialize the card */
2315 if (tw_reset_sequence(tw_dev))
2316 goto out_release_mem_region;
2317
2318 /* Set host specific parameters */
2319 host->max_id = TW_MAX_UNITS;
2320 host->max_cmd_len = TW_MAX_CDB_LEN;
2321
2322 /* Luns and channels aren't supported by adapter */
2323 host->max_lun = 0;
2324 host->max_channel = 0;
2325
2326 /* Register the card with the kernel SCSI layer */
2327 retval = scsi_add_host(host, &pdev->dev);
2328 if (retval) {
2329 printk(KERN_WARNING "3w-xxxx: scsi add host failed");
2330 goto out_release_mem_region;
2331 }
2332
2333 pci_set_drvdata(pdev, host);
2334
2335 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);
2336
2337 /* Now setup the interrupt handler */
2338 retval = request_irq(pdev->irq, tw_interrupt, IRQF_SHARED, "3w-xxxx", tw_dev);
2339 if (retval) {
2340 printk(KERN_WARNING "3w-xxxx: Error requesting IRQ.");
2341 goto out_remove_host;
2342 }
2343
2344 tw_device_extension_list[tw_device_extension_count] = tw_dev;
2345 tw_device_extension_count++;
2346
2347 /* Re-enable interrupts on the card */
2348 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2349
2350 /* Finally, scan the host */
2351 scsi_scan_host(host);
2352
2353 if (twe_major == -1) {
2354 if ((twe_major = register_chrdev (0, "twe", &tw_fops)) < 0)
2355 printk(KERN_WARNING "3w-xxxx: Failed to register character device.");
2356 }
2357 return 0;
2358
2359 out_remove_host:
2360 scsi_remove_host(host);
2361 out_release_mem_region:
2362 pci_release_regions(pdev);
2363 out_free_device_extension:
2364 tw_free_device_extension(tw_dev);
2365 scsi_host_put(host);
2366 out_disable_device:
2367 pci_disable_device(pdev);
2368
2369 return retval;
2370 } /* End tw_probe() */
2371
2372 /* This function is called to remove a device */
2373 static void tw_remove(struct pci_dev *pdev)
2374 {
2375 struct Scsi_Host *host = pci_get_drvdata(pdev);
2376 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2377
2378 scsi_remove_host(tw_dev->host);
2379
2380 /* Unregister character device */
2381 if (twe_major >= 0) {
2382 unregister_chrdev(twe_major, "twe");
2383 twe_major = -1;
2384 }
2385
2386 /* Shutdown the card */
2387 __tw_shutdown(tw_dev);
2388
2389 /* Free up the mem region */
2390 pci_release_regions(pdev);
2391
2392 /* Free up device extension resources */
2393 tw_free_device_extension(tw_dev);
2394
2395 scsi_host_put(tw_dev->host);
2396 pci_disable_device(pdev);
2397 tw_device_extension_count--;
2398 } /* End tw_remove() */
2399
2400 /* PCI Devices supported by this driver */
2401 static struct pci_device_id tw_pci_tbl[] __devinitdata = {
2402 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_1000,
2403 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2404 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_7000,
2405 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2406 { }
2407 };
2408 MODULE_DEVICE_TABLE(pci, tw_pci_tbl);
2409
2410 /* pci_driver initializer */
2411 static struct pci_driver tw_driver = {
2412 .name = "3w-xxxx",
2413 .id_table = tw_pci_tbl,
2414 .probe = tw_probe,
2415 .remove = tw_remove,
2416 .shutdown = tw_shutdown,
2417 };
2418
2419 /* This function is called on driver initialization */
2420 static int __init tw_init(void)
2421 {
2422 printk(KERN_WARNING "3ware Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2423
2424 return pci_register_driver(&tw_driver);
2425 } /* End tw_init() */
2426
2427 /* This function is called on driver exit */
2428 static void __exit tw_exit(void)
2429 {
2430 pci_unregister_driver(&tw_driver);
2431 } /* End tw_exit() */
2432
2433 module_init(tw_init);
2434 module_exit(tw_exit);
2435
Support for the Chinese Samsung S3C2440 based development boards