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blk-mq: always free hctx after request queue is freed
[linux/fpc-iii.git] / drivers / scsi / 3w-xxxx.c
blob2b1e0d5030201c4bb4538d8d84569b17c99cde9d
1 /*
2 3w-xxxx.c -- 3ware Storage Controller device driver for Linux.
3
4 Written By: Adam Radford <aradford@gmail.com>
5 Modifications By: Joel Jacobson <linux@3ware.com>
6 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
7 Brad Strand <linux@3ware.com>
8
9 Copyright (C) 1999-2010 3ware Inc.
10
11 Kernel compatibility By: Andre Hedrick <andre@suse.com>
12 Non-Copyright (C) 2000 Andre Hedrick <andre@suse.com>
13
14 Further tiny build fixes and trivial hoovering Alan Cox
15
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; version 2 of the License.
19
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
24
25 NO WARRANTY
26 THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
27 CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
28 LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
29 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
30 solely responsible for determining the appropriateness of using and
31 distributing the Program and assumes all risks associated with its
32 exercise of rights under this Agreement, including but not limited to
33 the risks and costs of program errors, damage to or loss of data,
34 programs or equipment, and unavailability or interruption of operations.
35
36 DISCLAIMER OF LIABILITY
37 NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
38 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39 DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
40 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
41 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
42 USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
43 HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
44
45 You should have received a copy of the GNU General Public License
46 along with this program; if not, write to the Free Software
47 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
48
49 Bugs/Comments/Suggestions should be mailed to:
50
51 aradford@gmail.com
52
53
54 History
55 -------
56 0.1.000 - Initial release.
57 0.4.000 - Added support for Asynchronous Event Notification through
58 ioctls for 3DM.
59 1.0.000 - Added DPO & FUA bit support for WRITE_10 & WRITE_6 cdb
60 to disable drive write-cache before writes.
61 1.1.000 - Fixed performance bug with DPO & FUA not existing for WRITE_6.
62 1.2.000 - Added support for clean shutdown notification/feature table.
63 1.02.00.001 - Added support for full command packet posts through ioctls
64 for 3DM.
65 Bug fix so hot spare drives don't show up.
66 1.02.00.002 - Fix bug with tw_setfeature() call that caused oops on some
67 systems.
68 08/21/00 - release previously allocated resources on failure at
69 tw_allocate_memory (acme)
70 1.02.00.003 - Fix tw_interrupt() to report error to scsi layer when
71 controller status is non-zero.
72 Added handling of request_sense opcode.
73 Fix possible null pointer dereference in
74 tw_reset_device_extension()
75 1.02.00.004 - Add support for device id of 3ware 7000 series controllers.
76 Make tw_setfeature() call with interrupts disabled.
77 Register interrupt handler before enabling interrupts.
78 Clear attention interrupt before draining aen queue.
79 1.02.00.005 - Allocate bounce buffers and custom queue depth for raid5 for
80 6000 and 5000 series controllers.
81 Reduce polling mdelays causing problems on some systems.
82 Fix use_sg = 1 calculation bug.
83 Check for scsi_register returning NULL.
84 Add aen count to /proc/scsi/3w-xxxx.
85 Remove aen code unit masking in tw_aen_complete().
86 1.02.00.006 - Remove unit from printk in tw_scsi_eh_abort(), causing
87 possible oops.
88 Fix possible null pointer dereference in tw_scsi_queue()
89 if done function pointer was invalid.
90 1.02.00.007 - Fix possible null pointer dereferences in tw_ioctl().
91 Remove check for invalid done function pointer from
92 tw_scsi_queue().
93 1.02.00.008 - Set max sectors per io to TW_MAX_SECTORS in tw_findcards().
94 Add tw_decode_error() for printing readable error messages.
95 Print some useful information on certain aen codes.
96 Add tw_decode_bits() for interpreting status register output.
97 Make scsi_set_pci_device() for kernels >= 2.4.4
98 Fix bug where aen's could be lost before a reset.
99 Re-add spinlocks in tw_scsi_detect().
100 Fix possible null pointer dereference in tw_aen_drain_queue()
101 during initialization.
102 Clear pci parity errors during initialization and during io.
103 1.02.00.009 - Remove redundant increment in tw_state_request_start().
104 Add ioctl support for direct ATA command passthru.
105 Add entire aen code string list.
106 1.02.00.010 - Cleanup queueing code, fix jbod thoughput.
107 Fix get_param for specific units.
108 1.02.00.011 - Fix bug in tw_aen_complete() where aen's could be lost.
109 Fix tw_aen_drain_queue() to display useful info at init.
110 Set tw_host->max_id for 12 port cards.
111 Add ioctl support for raw command packet post from userspace
112 with sglist fragments (parameter and io).
113 1.02.00.012 - Fix read capacity to under report by 1 sector to fix get
114 last sector ioctl.
115 1.02.00.013 - Fix bug where more AEN codes weren't coming out during
116 driver initialization.
117 Improved handling of PCI aborts.
118 1.02.00.014 - Fix bug in tw_findcards() where AEN code could be lost.
119 Increase timeout in tw_aen_drain_queue() to 30 seconds.
120 1.02.00.015 - Re-write raw command post with data ioctl method.
121 Remove raid5 bounce buffers for raid5 for 6XXX for kernel 2.5
122 Add tw_map/unmap_scsi_sg/single_data() for kernel 2.5
123 Replace io_request_lock with host_lock for kernel 2.5
124 Set max_cmd_len to 16 for 3dm for kernel 2.5
125 1.02.00.016 - Set host->max_sectors back up to 256.
126 1.02.00.017 - Modified pci parity error handling/clearing from config space
127 during initialization.
128 1.02.00.018 - Better handling of request sense opcode and sense information
129 for failed commands. Add tw_decode_sense().
130 Replace all mdelay()'s with scsi_sleep().
131 1.02.00.019 - Revert mdelay's and scsi_sleep's, this caused problems on
132 some SMP systems.
133 1.02.00.020 - Add pci_set_dma_mask(), rewrite kmalloc()/virt_to_bus() to
134 pci_alloc/free_consistent().
135 Better alignment checking in tw_allocate_memory().
136 Cleanup tw_initialize_device_extension().
137 1.02.00.021 - Bump cmd_per_lun in SHT to 255 for better jbod performance.
138 Improve handling of errors in tw_interrupt().
139 Add handling/clearing of controller queue error.
140 Empty stale responses before draining aen queue.
141 Fix tw_scsi_eh_abort() to not reset on every io abort.
142 Set can_queue in SHT to 255 to prevent hang from AEN.
143 1.02.00.022 - Fix possible null pointer dereference in tw_scsi_release().
144 1.02.00.023 - Fix bug in tw_aen_drain_queue() where unit # was always zero.
145 1.02.00.024 - Add severity levels to AEN strings.
146 1.02.00.025 - Fix command interrupt spurious error messages.
147 Fix bug in raw command post with data ioctl method.
148 Fix bug where rollcall sometimes failed with cable errors.
149 Print unit # on all command timeouts.
150 1.02.00.026 - Fix possible infinite retry bug with power glitch induced
151 drive timeouts.
152 Cleanup some AEN severity levels.
153 1.02.00.027 - Add drive not supported AEN code for SATA controllers.
154 Remove spurious unknown ioctl error message.
155 1.02.00.028 - Fix bug where multiple controllers with no units were the
156 same card number.
157 Fix bug where cards were being shut down more than once.
158 1.02.00.029 - Add missing pci_free_consistent() in tw_allocate_memory().
159 Replace pci_map_single() with pci_map_page() for highmem.
160 Check for tw_setfeature() failure.
161 1.02.00.030 - Make driver 64-bit clean.
162 1.02.00.031 - Cleanup polling timeouts/routines in several places.
163 Add support for mode sense opcode.
164 Add support for cache mode page.
165 Add support for synchronize cache opcode.
166 1.02.00.032 - Fix small multicard rollcall bug.
167 Make driver stay loaded with no units for hot add/swap.
168 Add support for "twe" character device for ioctls.
169 Clean up request_id queueing code.
170 Fix tw_scsi_queue() spinlocks.
171 1.02.00.033 - Fix tw_aen_complete() to not queue 'queue empty' AEN's.
172 Initialize queues correctly when loading with no valid units.
173 1.02.00.034 - Fix tw_decode_bits() to handle multiple errors.
174 Add support for user configurable cmd_per_lun.
175 Add support for sht->slave_configure().
176 1.02.00.035 - Improve tw_allocate_memory() memory allocation.
177 Fix tw_chrdev_ioctl() to sleep correctly.
178 1.02.00.036 - Increase character ioctl timeout to 60 seconds.
179 1.02.00.037 - Fix tw_ioctl() to handle all non-data ATA passthru cmds
180 for 'smartmontools' support.
181 1.26.00.038 - Roll driver minor version to 26 to denote kernel 2.6.
182 Add support for cmds_per_lun module parameter.
183 1.26.00.039 - Fix bug in tw_chrdev_ioctl() polling code.
184 Fix data_buffer_length usage in tw_chrdev_ioctl().
185 Update contact information.
186 1.26.02.000 - Convert driver to pci_driver format.
187 1.26.02.001 - Increase max ioctl buffer size to 512 sectors.
188 Make tw_scsi_queue() return 0 for 'Unknown scsi opcode'.
189 Fix tw_remove() to free irq handler/unregister_chrdev()
190 before shutting down card.
191 Change to new 'change_queue_depth' api.
192 Fix 'handled=1' ISR usage, remove bogus IRQ check.
193 1.26.02.002 - Free irq handler in __tw_shutdown().
194 Turn on RCD bit for caching mode page.
195 Serialize reset code.
196 1.26.02.003 - Force 60 second timeout default.
197 */
198
199 #include <linux/module.h>
200 #include <linux/reboot.h>
201 #include <linux/spinlock.h>
202 #include <linux/interrupt.h>
203 #include <linux/moduleparam.h>
204 #include <linux/errno.h>
205 #include <linux/types.h>
206 #include <linux/delay.h>
207 #include <linux/gfp.h>
208 #include <linux/pci.h>
209 #include <linux/time.h>
210 #include <linux/mutex.h>
211 #include <asm/io.h>
212 #include <asm/irq.h>
213 #include <linux/uaccess.h>
214 #include <scsi/scsi.h>
215 #include <scsi/scsi_host.h>
216 #include <scsi/scsi_tcq.h>
217 #include <scsi/scsi_cmnd.h>
218 #include <scsi/scsi_eh.h>
219 #include "3w-xxxx.h"
220
221 /* Globals */
222 #define TW_DRIVER_VERSION "1.26.02.003"
223 static DEFINE_MUTEX(tw_mutex);
224 static TW_Device_Extension *tw_device_extension_list[TW_MAX_SLOT];
225 static int tw_device_extension_count = 0;
226 static int twe_major = -1;
227
228 /* Module parameters */
229 MODULE_AUTHOR("LSI");
230 MODULE_DESCRIPTION("3ware Storage Controller Linux Driver");
231 MODULE_LICENSE("GPL");
232 MODULE_VERSION(TW_DRIVER_VERSION);
233
234 /* Function prototypes */
235 static int tw_reset_device_extension(TW_Device_Extension *tw_dev);
236
237 /* Functions */
238
239 /* This function will check the status register for unexpected bits */
240 static int tw_check_bits(u32 status_reg_value)
241 {
242 if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS) {
243 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): No expected bits (0x%x).\n", status_reg_value);
244 return 1;
245 }
246 if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0) {
247 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): Found unexpected bits (0x%x).\n", status_reg_value);
248 return 1;
249 }
250
251 return 0;
252 } /* End tw_check_bits() */
253
254 /* This function will print readable messages from status register errors */
255 static int tw_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value, int print_host)
256 {
257 char host[16];
258
259 dprintk(KERN_WARNING "3w-xxxx: tw_decode_bits()\n");
260
261 if (print_host)
262 sprintf(host, " scsi%d:", tw_dev->host->host_no);
263 else
264 host[0] = '\0';
265
266 if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) {
267 printk(KERN_WARNING "3w-xxxx:%s PCI Parity Error: clearing.\n", host);
268 outl(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
269 }
270
271 if (status_reg_value & TW_STATUS_PCI_ABORT) {
272 printk(KERN_WARNING "3w-xxxx:%s PCI Abort: clearing.\n", host);
273 outl(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev));
274 pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT);
275 }
276
277 if (status_reg_value & TW_STATUS_QUEUE_ERROR) {
278 printk(KERN_WARNING "3w-xxxx:%s Controller Queue Error: clearing.\n", host);
279 outl(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
280 }
281
282 if (status_reg_value & TW_STATUS_SBUF_WRITE_ERROR) {
283 printk(KERN_WARNING "3w-xxxx:%s SBUF Write Error: clearing.\n", host);
284 outl(TW_CONTROL_CLEAR_SBUF_WRITE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
285 }
286
287 if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
288 if (tw_dev->reset_print == 0) {
289 printk(KERN_WARNING "3w-xxxx:%s Microcontroller Error: clearing.\n", host);
290 tw_dev->reset_print = 1;
291 }
292 return 1;
293 }
294
295 return 0;
296 } /* End tw_decode_bits() */
297
298 /* This function will poll the status register for a flag */
299 static int tw_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds)
300 {
301 u32 status_reg_value;
302 unsigned long before;
303 int retval = 1;
304
305 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
306 before = jiffies;
307
308 if (tw_check_bits(status_reg_value))
309 tw_decode_bits(tw_dev, status_reg_value, 0);
310
311 while ((status_reg_value & flag) != flag) {
312 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
313
314 if (tw_check_bits(status_reg_value))
315 tw_decode_bits(tw_dev, status_reg_value, 0);
316
317 if (time_after(jiffies, before + HZ * seconds))
318 goto out;
319
320 msleep(50);
321 }
322 retval = 0;
323 out:
324 return retval;
325 } /* End tw_poll_status() */
326
327 /* This function will poll the status register for disappearance of a flag */
328 static int tw_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds)
329 {
330 u32 status_reg_value;
331 unsigned long before;
332 int retval = 1;
333
334 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
335 before = jiffies;
336
337 if (tw_check_bits(status_reg_value))
338 tw_decode_bits(tw_dev, status_reg_value, 0);
339
340 while ((status_reg_value & flag) != 0) {
341 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
342
343 if (tw_check_bits(status_reg_value))
344 tw_decode_bits(tw_dev, status_reg_value, 0);
345
346 if (time_after(jiffies, before + HZ * seconds))
347 goto out;
348
349 msleep(50);
350 }
351 retval = 0;
352 out:
353 return retval;
354 } /* End tw_poll_status_gone() */
355
356 /* This function will attempt to post a command packet to the board */
357 static int tw_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
358 {
359 u32 status_reg_value;
360 unsigned long command_que_value;
361
362 dprintk(KERN_NOTICE "3w-xxxx: tw_post_command_packet()\n");
363 command_que_value = tw_dev->command_packet_physical_address[request_id];
364 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
365
366 if (tw_check_bits(status_reg_value)) {
367 dprintk(KERN_WARNING "3w-xxxx: tw_post_command_packet(): Unexpected bits.\n");
368 tw_decode_bits(tw_dev, status_reg_value, 1);
369 }
370
371 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
372 /* We successfully posted the command packet */
373 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
374 tw_dev->state[request_id] = TW_S_POSTED;
375 tw_dev->posted_request_count++;
376 if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) {
377 tw_dev->max_posted_request_count = tw_dev->posted_request_count;
378 }
379 } else {
380 /* Couldn't post the command packet, so we do it in the isr */
381 if (tw_dev->state[request_id] != TW_S_PENDING) {
382 tw_dev->state[request_id] = TW_S_PENDING;
383 tw_dev->pending_request_count++;
384 if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) {
385 tw_dev->max_pending_request_count = tw_dev->pending_request_count;
386 }
387 tw_dev->pending_queue[tw_dev->pending_tail] = request_id;
388 if (tw_dev->pending_tail == TW_Q_LENGTH-1) {
389 tw_dev->pending_tail = TW_Q_START;
390 } else {
391 tw_dev->pending_tail = tw_dev->pending_tail + 1;
392 }
393 }
394 TW_UNMASK_COMMAND_INTERRUPT(tw_dev);
395 return 1;
396 }
397 return 0;
398 } /* End tw_post_command_packet() */
399
400 /* This function will return valid sense buffer information for failed cmds */
401 static int tw_decode_sense(TW_Device_Extension *tw_dev, int request_id, int fill_sense)
402 {
403 int i;
404 TW_Command *command;
405
406 dprintk(KERN_WARNING "3w-xxxx: tw_decode_sense()\n");
407 command = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
408
409 printk(KERN_WARNING "3w-xxxx: scsi%d: Command failed: status = 0x%x, flags = 0x%x, unit #%d.\n", tw_dev->host->host_no, command->status, command->flags, TW_UNIT_OUT(command->unit__hostid));
410
411 /* Attempt to return intelligent sense information */
412 if (fill_sense) {
413 if ((command->status == 0xc7) || (command->status == 0xcb)) {
414 for (i = 0; i < ARRAY_SIZE(tw_sense_table); i++) {
415 if (command->flags == tw_sense_table[i][0]) {
416
417 /* Valid bit and 'current errors' */
418 tw_dev->srb[request_id]->sense_buffer[0] = (0x1 << 7 | 0x70);
419
420 /* Sense key */
421 tw_dev->srb[request_id]->sense_buffer[2] = tw_sense_table[i][1];
422
423 /* Additional sense length */
424 tw_dev->srb[request_id]->sense_buffer[7] = 0xa; /* 10 bytes */
425
426 /* Additional sense code */
427 tw_dev->srb[request_id]->sense_buffer[12] = tw_sense_table[i][2];
428
429 /* Additional sense code qualifier */
430 tw_dev->srb[request_id]->sense_buffer[13] = tw_sense_table[i][3];
431
432 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
433 return TW_ISR_DONT_RESULT; /* Special case for isr to not over-write result */
434 }
435 }
436 }
437
438 /* If no table match, error so we get a reset */
439 return 1;
440 }
441
442 return 0;
443 } /* End tw_decode_sense() */
444
445 /* This function will report controller error status */
446 static int tw_check_errors(TW_Device_Extension *tw_dev)
447 {
448 u32 status_reg_value;
449
450 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
451
452 if (TW_STATUS_ERRORS(status_reg_value) || tw_check_bits(status_reg_value)) {
453 tw_decode_bits(tw_dev, status_reg_value, 0);
454 return 1;
455 }
456
457 return 0;
458 } /* End tw_check_errors() */
459
460 /* This function will empty the response que */
461 static void tw_empty_response_que(TW_Device_Extension *tw_dev)
462 {
463 u32 status_reg_value, response_que_value;
464
465 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
466
467 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
468 response_que_value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
469 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
470 }
471 } /* End tw_empty_response_que() */
472
473 /* This function will free a request_id */
474 static void tw_state_request_finish(TW_Device_Extension *tw_dev, int request_id)
475 {
476 tw_dev->free_queue[tw_dev->free_tail] = request_id;
477 tw_dev->state[request_id] = TW_S_FINISHED;
478 tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
479 } /* End tw_state_request_finish() */
480
481 /* This function will assign an available request_id */
482 static void tw_state_request_start(TW_Device_Extension *tw_dev, int *request_id)
483 {
484 *request_id = tw_dev->free_queue[tw_dev->free_head];
485 tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
486 tw_dev->state[*request_id] = TW_S_STARTED;
487 } /* End tw_state_request_start() */
488
489 /* Show some statistics about the card */
490 static ssize_t tw_show_stats(struct device *dev, struct device_attribute *attr,
491 char *buf)
492 {
493 struct Scsi_Host *host = class_to_shost(dev);
494 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
495 unsigned long flags = 0;
496 ssize_t len;
497
498 spin_lock_irqsave(tw_dev->host->host_lock, flags);
499 len = snprintf(buf, PAGE_SIZE, "3w-xxxx Driver version: %s\n"
500 "Current commands posted: %4d\n"
501 "Max commands posted: %4d\n"
502 "Current pending commands: %4d\n"
503 "Max pending commands: %4d\n"
504 "Last sgl length: %4d\n"
505 "Max sgl length: %4d\n"
506 "Last sector count: %4d\n"
507 "Max sector count: %4d\n"
508 "SCSI Host Resets: %4d\n"
509 "AEN's: %4d\n",
510 TW_DRIVER_VERSION,
511 tw_dev->posted_request_count,
512 tw_dev->max_posted_request_count,
513 tw_dev->pending_request_count,
514 tw_dev->max_pending_request_count,
515 tw_dev->sgl_entries,
516 tw_dev->max_sgl_entries,
517 tw_dev->sector_count,
518 tw_dev->max_sector_count,
519 tw_dev->num_resets,
520 tw_dev->aen_count);
521 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
522 return len;
523 } /* End tw_show_stats() */
524
525 /* Create sysfs 'stats' entry */
526 static struct device_attribute tw_host_stats_attr = {
527 .attr = {
528 .name = "stats",
529 .mode = S_IRUGO,
530 },
531 .show = tw_show_stats
532 };
533
534 /* Host attributes initializer */
535 static struct device_attribute *tw_host_attrs[] = {
536 &tw_host_stats_attr,
537 NULL,
538 };
539
540 /* This function will read the aen queue from the isr */
541 static int tw_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
542 {
543 TW_Command *command_packet;
544 TW_Param *param;
545 unsigned long command_que_value;
546 u32 status_reg_value;
547 unsigned long param_value = 0;
548
549 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_read_queue()\n");
550
551 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
552 if (tw_check_bits(status_reg_value)) {
553 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Unexpected bits.\n");
554 tw_decode_bits(tw_dev, status_reg_value, 1);
555 return 1;
556 }
557 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
558 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet virtual address.\n");
559 return 1;
560 }
561 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
562 memset(command_packet, 0, sizeof(TW_Sector));
563 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
564 command_packet->size = 4;
565 command_packet->request_id = request_id;
566 command_packet->status = 0;
567 command_packet->flags = 0;
568 command_packet->byte6.parameter_count = 1;
569 command_que_value = tw_dev->command_packet_physical_address[request_id];
570 if (command_que_value == 0) {
571 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet physical address.\n");
572 return 1;
573 }
574 /* Now setup the param */
575 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
576 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment virtual address.\n");
577 return 1;
578 }
579 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
580 memset(param, 0, sizeof(TW_Sector));
581 param->table_id = 0x401; /* AEN table */
582 param->parameter_id = 2; /* Unit code */
583 param->parameter_size_bytes = 2;
584 param_value = tw_dev->alignment_physical_address[request_id];
585 if (param_value == 0) {
586 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment physical address.\n");
587 return 1;
588 }
589 command_packet->byte8.param.sgl[0].address = param_value;
590 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
591
592 /* Now post the command packet */
593 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
594 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post succeeded.\n");
595 tw_dev->srb[request_id] = NULL; /* Flag internal command */
596 tw_dev->state[request_id] = TW_S_POSTED;
597 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
598 } else {
599 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post failed, will retry.\n");
600 return 1;
601 }
602
603 return 0;
604 } /* End tw_aen_read_queue() */
605
606 /* This function will complete an aen request from the isr */
607 static int tw_aen_complete(TW_Device_Extension *tw_dev, int request_id)
608 {
609 TW_Param *param;
610 unsigned short aen;
611 int error = 0, table_max = 0;
612
613 dprintk(KERN_WARNING "3w-xxxx: tw_aen_complete()\n");
614 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
615 printk(KERN_WARNING "3w-xxxx: tw_aen_complete(): Bad alignment virtual address.\n");
616 return 1;
617 }
618 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
619 aen = *(unsigned short *)(param->data);
620 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_complete(): Queue'd code 0x%x\n", aen);
621
622 /* Print some useful info when certain aen codes come out */
623 if (aen == 0x0ff) {
624 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: INFO: AEN queue overflow.\n", tw_dev->host->host_no);
625 } else {
626 table_max = ARRAY_SIZE(tw_aen_string);
627 if ((aen & 0x0ff) < table_max) {
628 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
629 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s%d.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff], aen >> 8);
630 } else {
631 if (aen != 0x0)
632 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff]);
633 }
634 } else {
635 printk(KERN_WARNING "3w-xxxx: scsi%d: Received AEN %d.\n", tw_dev->host->host_no, aen);
636 }
637 }
638 if (aen != TW_AEN_QUEUE_EMPTY) {
639 tw_dev->aen_count++;
640
641 /* Now queue the code */
642 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
643 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
644 tw_dev->aen_tail = TW_Q_START;
645 } else {
646 tw_dev->aen_tail = tw_dev->aen_tail + 1;
647 }
648 if (tw_dev->aen_head == tw_dev->aen_tail) {
649 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
650 tw_dev->aen_head = TW_Q_START;
651 } else {
652 tw_dev->aen_head = tw_dev->aen_head + 1;
653 }
654 }
655
656 error = tw_aen_read_queue(tw_dev, request_id);
657 if (error) {
658 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing AEN.\n", tw_dev->host->host_no);
659 tw_dev->state[request_id] = TW_S_COMPLETED;
660 tw_state_request_finish(tw_dev, request_id);
661 }
662 } else {
663 tw_dev->state[request_id] = TW_S_COMPLETED;
664 tw_state_request_finish(tw_dev, request_id);
665 }
666
667 return 0;
668 } /* End tw_aen_complete() */
669
670 /* This function will drain the aen queue after a soft reset */
671 static int tw_aen_drain_queue(TW_Device_Extension *tw_dev)
672 {
673 TW_Command *command_packet;
674 TW_Param *param;
675 int request_id = 0;
676 unsigned long command_que_value;
677 unsigned long param_value;
678 TW_Response_Queue response_queue;
679 unsigned short aen;
680 unsigned short aen_code;
681 int finished = 0;
682 int first_reset = 0;
683 int queue = 0;
684 int found = 0, table_max = 0;
685
686 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_drain_queue()\n");
687
688 if (tw_poll_status(tw_dev, TW_STATUS_ATTENTION_INTERRUPT | TW_STATUS_MICROCONTROLLER_READY, 30)) {
689 dprintk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): No attention interrupt for card %d.\n", tw_device_extension_count);
690 return 1;
691 }
692 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
693
694 /* Empty response queue */
695 tw_empty_response_que(tw_dev);
696
697 /* Initialize command packet */
698 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
699 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet virtual address.\n");
700 return 1;
701 }
702 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
703 memset(command_packet, 0, sizeof(TW_Sector));
704 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
705 command_packet->size = 4;
706 command_packet->request_id = request_id;
707 command_packet->status = 0;
708 command_packet->flags = 0;
709 command_packet->byte6.parameter_count = 1;
710 command_que_value = tw_dev->command_packet_physical_address[request_id];
711 if (command_que_value == 0) {
712 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet physical address.\n");
713 return 1;
714 }
715
716 /* Now setup the param */
717 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
718 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment virtual address.\n");
719 return 1;
720 }
721 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
722 memset(param, 0, sizeof(TW_Sector));
723 param->table_id = 0x401; /* AEN table */
724 param->parameter_id = 2; /* Unit code */
725 param->parameter_size_bytes = 2;
726 param_value = tw_dev->alignment_physical_address[request_id];
727 if (param_value == 0) {
728 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment physical address.\n");
729 return 1;
730 }
731 command_packet->byte8.param.sgl[0].address = param_value;
732 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
733
734 /* Now drain the controller's aen queue */
735 do {
736 /* Post command packet */
737 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
738
739 /* Now poll for completion */
740 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
741 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
742 request_id = TW_RESID_OUT(response_queue.response_id);
743
744 if (request_id != 0) {
745 /* Unexpected request id */
746 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Unexpected request id.\n");
747 return 1;
748 }
749
750 if (command_packet->status != 0) {
751 if (command_packet->flags != TW_AEN_TABLE_UNDEFINED) {
752 /* Bad response */
753 tw_decode_sense(tw_dev, request_id, 0);
754 return 1;
755 } else {
756 /* We know this is a 3w-1x00, and doesn't support aen's */
757 return 0;
758 }
759 }
760
761 /* Now check the aen */
762 aen = *(unsigned short *)(param->data);
763 aen_code = (aen & 0x0ff);
764 queue = 0;
765 switch (aen_code) {
766 case TW_AEN_QUEUE_EMPTY:
767 dprintk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
768 if (first_reset != 1) {
769 return 1;
770 } else {
771 finished = 1;
772 }
773 break;
774 case TW_AEN_SOFT_RESET:
775 if (first_reset == 0) {
776 first_reset = 1;
777 } else {
778 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
779 tw_dev->aen_count++;
780 queue = 1;
781 }
782 break;
783 default:
784 if (aen == 0x0ff) {
785 printk(KERN_WARNING "3w-xxxx: AEN: INFO: AEN queue overflow.\n");
786 } else {
787 table_max = ARRAY_SIZE(tw_aen_string);
788 if ((aen & 0x0ff) < table_max) {
789 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
790 printk(KERN_WARNING "3w-xxxx: AEN: %s%d.\n", tw_aen_string[aen & 0xff], aen >> 8);
791 } else {
792 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
793 }
794 } else
795 printk(KERN_WARNING "3w-xxxx: Received AEN %d.\n", aen);
796 }
797 tw_dev->aen_count++;
798 queue = 1;
799 }
800
801 /* Now put the aen on the aen_queue */
802 if (queue == 1) {
803 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
804 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
805 tw_dev->aen_tail = TW_Q_START;
806 } else {
807 tw_dev->aen_tail = tw_dev->aen_tail + 1;
808 }
809 if (tw_dev->aen_head == tw_dev->aen_tail) {
810 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
811 tw_dev->aen_head = TW_Q_START;
812 } else {
813 tw_dev->aen_head = tw_dev->aen_head + 1;
814 }
815 }
816 }
817 found = 1;
818 }
819 if (found == 0) {
820 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Response never received.\n");
821 return 1;
822 }
823 } while (finished == 0);
824
825 return 0;
826 } /* End tw_aen_drain_queue() */
827
828 /* This function will allocate memory */
829 static int tw_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
830 {
831 int i;
832 dma_addr_t dma_handle;
833 unsigned long *cpu_addr = NULL;
834
835 dprintk(KERN_NOTICE "3w-xxxx: tw_allocate_memory()\n");
836
837 cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev,
838 size * TW_Q_LENGTH, &dma_handle, GFP_KERNEL);
839 if (cpu_addr == NULL) {
840 printk(KERN_WARNING "3w-xxxx: dma_alloc_coherent() failed.\n");
841 return 1;
842 }
843
844 if ((unsigned long)cpu_addr % (tw_dev->tw_pci_dev->device == TW_DEVICE_ID ? TW_ALIGNMENT_6000 : TW_ALIGNMENT_7000)) {
845 printk(KERN_WARNING "3w-xxxx: Couldn't allocate correctly aligned memory.\n");
846 dma_free_coherent(&tw_dev->tw_pci_dev->dev, size * TW_Q_LENGTH,
847 cpu_addr, dma_handle);
848 return 1;
849 }
850
851 memset(cpu_addr, 0, size*TW_Q_LENGTH);
852
853 for (i=0;i<TW_Q_LENGTH;i++) {
854 switch(which) {
855 case 0:
856 tw_dev->command_packet_physical_address[i] = dma_handle+(i*size);
857 tw_dev->command_packet_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
858 break;
859 case 1:
860 tw_dev->alignment_physical_address[i] = dma_handle+(i*size);
861 tw_dev->alignment_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
862 break;
863 default:
864 printk(KERN_WARNING "3w-xxxx: tw_allocate_memory(): case slip in tw_allocate_memory()\n");
865 return 1;
866 }
867 }
868
869 return 0;
870 } /* End tw_allocate_memory() */
871
872 /* This function handles ioctl for the character device */
873 static long tw_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
874 {
875 int request_id;
876 dma_addr_t dma_handle;
877 unsigned short tw_aen_code;
878 unsigned long flags;
879 unsigned int data_buffer_length = 0;
880 unsigned long data_buffer_length_adjusted = 0;
881 struct inode *inode = file_inode(file);
882 unsigned long *cpu_addr;
883 long timeout;
884 TW_New_Ioctl *tw_ioctl;
885 TW_Passthru *passthru;
886 TW_Device_Extension *tw_dev = tw_device_extension_list[iminor(inode)];
887 int retval = -EFAULT;
888 void __user *argp = (void __user *)arg;
889
890 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl()\n");
891
892 mutex_lock(&tw_mutex);
893 /* Only let one of these through at a time */
894 if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
895 mutex_unlock(&tw_mutex);
896 return -EINTR;
897 }
898
899 /* First copy down the buffer length */
900 if (copy_from_user(&data_buffer_length, argp, sizeof(unsigned int)))
901 goto out;
902
903 /* Check size */
904 if (data_buffer_length > TW_MAX_IOCTL_SECTORS * 512) {
905 retval = -EINVAL;
906 goto out;
907 }
908
909 /* Hardware can only do multiple of 512 byte transfers */
910 data_buffer_length_adjusted = (data_buffer_length + 511) & ~511;
911
912 /* Now allocate ioctl buf memory */
913 cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, &dma_handle, GFP_KERNEL);
914 if (cpu_addr == NULL) {
915 retval = -ENOMEM;
916 goto out;
917 }
918
919 tw_ioctl = (TW_New_Ioctl *)cpu_addr;
920
921 /* Now copy down the entire ioctl */
922 if (copy_from_user(tw_ioctl, argp, data_buffer_length + sizeof(TW_New_Ioctl) - 1))
923 goto out2;
924
925 passthru = (TW_Passthru *)&tw_ioctl->firmware_command;
926
927 /* See which ioctl we are doing */
928 switch (cmd) {
929 case TW_OP_NOP:
930 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_OP_NOP.\n");
931 break;
932 case TW_OP_AEN_LISTEN:
933 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_AEN_LISTEN.\n");
934 memset(tw_ioctl->data_buffer, 0, data_buffer_length);
935
936 spin_lock_irqsave(tw_dev->host->host_lock, flags);
937 if (tw_dev->aen_head == tw_dev->aen_tail) {
938 tw_aen_code = TW_AEN_QUEUE_EMPTY;
939 } else {
940 tw_aen_code = tw_dev->aen_queue[tw_dev->aen_head];
941 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
942 tw_dev->aen_head = TW_Q_START;
943 } else {
944 tw_dev->aen_head = tw_dev->aen_head + 1;
945 }
946 }
947 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
948 memcpy(tw_ioctl->data_buffer, &tw_aen_code, sizeof(tw_aen_code));
949 break;
950 case TW_CMD_PACKET_WITH_DATA:
951 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_CMD_PACKET_WITH_DATA.\n");
952 spin_lock_irqsave(tw_dev->host->host_lock, flags);
953
954 tw_state_request_start(tw_dev, &request_id);
955
956 /* Flag internal command */
957 tw_dev->srb[request_id] = NULL;
958
959 /* Flag chrdev ioctl */
960 tw_dev->chrdev_request_id = request_id;
961
962 tw_ioctl->firmware_command.request_id = request_id;
963
964 /* Load the sg list */
965 switch (TW_SGL_OUT(tw_ioctl->firmware_command.opcode__sgloffset)) {
966 case 2:
967 tw_ioctl->firmware_command.byte8.param.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
968 tw_ioctl->firmware_command.byte8.param.sgl[0].length = data_buffer_length_adjusted;
969 break;
970 case 3:
971 tw_ioctl->firmware_command.byte8.io.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
972 tw_ioctl->firmware_command.byte8.io.sgl[0].length = data_buffer_length_adjusted;
973 break;
974 case 5:
975 passthru->sg_list[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
976 passthru->sg_list[0].length = data_buffer_length_adjusted;
977 break;
978 }
979
980 memcpy(tw_dev->command_packet_virtual_address[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command));
981
982 /* Now post the command packet to the controller */
983 tw_post_command_packet(tw_dev, request_id);
984 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
985
986 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
987
988 /* Now wait for the command to complete */
989 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
990
991 /* We timed out, and didn't get an interrupt */
992 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
993 /* Now we need to reset the board */
994 printk(KERN_WARNING "3w-xxxx: scsi%d: Character ioctl (0x%x) timed out, resetting card.\n", tw_dev->host->host_no, cmd);
995 retval = -EIO;
996 if (tw_reset_device_extension(tw_dev)) {
997 printk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): Reset failed for card %d.\n", tw_dev->host->host_no);
998 }
999 goto out2;
1000 }
1001
1002 /* Now copy in the command packet response */
1003 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virtual_address[request_id], sizeof(TW_Command));
1004
1005 /* Now complete the io */
1006 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1007 tw_dev->posted_request_count--;
1008 tw_dev->state[request_id] = TW_S_COMPLETED;
1009 tw_state_request_finish(tw_dev, request_id);
1010 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1011 break;
1012 default:
1013 retval = -ENOTTY;
1014 goto out2;
1015 }
1016
1017 /* Now copy the response to userspace */
1018 if (copy_to_user(argp, tw_ioctl, sizeof(TW_New_Ioctl) + data_buffer_length - 1))
1019 goto out2;
1020 retval = 0;
1021 out2:
1022 /* Now free ioctl buf memory */
1023 dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, cpu_addr, dma_handle);
1024 out:
1025 mutex_unlock(&tw_dev->ioctl_lock);
1026 mutex_unlock(&tw_mutex);
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 dprintk(KERN_WARNING "3w-xxxx: tw_ioctl_open()\n");
1037
1038 if (!capable(CAP_SYS_ADMIN))
1039 return -EACCES;
1040
1041 minor_number = iminor(inode);
1042 if (minor_number >= tw_device_extension_count)
1043 return -ENODEV;
1044
1045 return 0;
1046 } /* End tw_chrdev_open() */
1047
1048 /* File operations struct for character device */
1049 static const struct file_operations tw_fops = {
1050 .owner = THIS_MODULE,
1051 .unlocked_ioctl = tw_chrdev_ioctl,
1052 #ifdef CONFIG_COMPAT
1053 .compat_ioctl = tw_chrdev_ioctl,
1054 #endif
1055 .open = tw_chrdev_open,
1056 .release = NULL,
1057 .llseek = noop_llseek,
1058 };
1059
1060 /* This function will free up device extension resources */
1061 static void tw_free_device_extension(TW_Device_Extension *tw_dev)
1062 {
1063 dprintk(KERN_NOTICE "3w-xxxx: tw_free_device_extension()\n");
1064
1065 /* Free command packet and generic buffer memory */
1066 if (tw_dev->command_packet_virtual_address[0])
1067 dma_free_coherent(&tw_dev->tw_pci_dev->dev,
1068 sizeof(TW_Command) * TW_Q_LENGTH,
1069 tw_dev->command_packet_virtual_address[0],
1070 tw_dev->command_packet_physical_address[0]);
1071
1072 if (tw_dev->alignment_virtual_address[0])
1073 dma_free_coherent(&tw_dev->tw_pci_dev->dev,
1074 sizeof(TW_Sector) * TW_Q_LENGTH,
1075 tw_dev->alignment_virtual_address[0],
1076 tw_dev->alignment_physical_address[0]);
1077 } /* End tw_free_device_extension() */
1078
1079 /* This function will send an initconnection command to controller */
1080 static int tw_initconnection(TW_Device_Extension *tw_dev, int message_credits)
1081 {
1082 unsigned long command_que_value;
1083 TW_Command *command_packet;
1084 TW_Response_Queue response_queue;
1085 int request_id = 0;
1086
1087 dprintk(KERN_NOTICE "3w-xxxx: tw_initconnection()\n");
1088
1089 /* Initialize InitConnection command packet */
1090 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1091 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet virtual address.\n");
1092 return 1;
1093 }
1094
1095 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1096 memset(command_packet, 0, sizeof(TW_Sector));
1097 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_INIT_CONNECTION);
1098 command_packet->size = TW_INIT_COMMAND_PACKET_SIZE;
1099 command_packet->request_id = request_id;
1100 command_packet->status = 0x0;
1101 command_packet->flags = 0x0;
1102 command_packet->byte6.message_credits = message_credits;
1103 command_packet->byte8.init_connection.response_queue_pointer = 0x0;
1104 command_que_value = tw_dev->command_packet_physical_address[request_id];
1105
1106 if (command_que_value == 0) {
1107 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet physical address.\n");
1108 return 1;
1109 }
1110
1111 /* Send command packet to the board */
1112 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1113
1114 /* Poll for completion */
1115 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1116 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1117 request_id = TW_RESID_OUT(response_queue.response_id);
1118
1119 if (request_id != 0) {
1120 /* unexpected request id */
1121 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Unexpected request id.\n");
1122 return 1;
1123 }
1124 if (command_packet->status != 0) {
1125 /* bad response */
1126 tw_decode_sense(tw_dev, request_id, 0);
1127 return 1;
1128 }
1129 }
1130 return 0;
1131 } /* End tw_initconnection() */
1132
1133 /* Set a value in the features table */
1134 static int tw_setfeature(TW_Device_Extension *tw_dev, int parm, int param_size,
1135 unsigned char *val)
1136 {
1137 TW_Param *param;
1138 TW_Command *command_packet;
1139 TW_Response_Queue response_queue;
1140 int request_id = 0;
1141 unsigned long command_que_value;
1142 unsigned long param_value;
1143
1144 /* Initialize SetParam command packet */
1145 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1146 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet virtual address.\n");
1147 return 1;
1148 }
1149 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1150 memset(command_packet, 0, sizeof(TW_Sector));
1151 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1152
1153 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
1154 param->table_id = 0x404; /* Features table */
1155 param->parameter_id = parm;
1156 param->parameter_size_bytes = param_size;
1157 memcpy(param->data, val, param_size);
1158
1159 param_value = tw_dev->alignment_physical_address[request_id];
1160 if (param_value == 0) {
1161 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad alignment physical address.\n");
1162 tw_dev->state[request_id] = TW_S_COMPLETED;
1163 tw_state_request_finish(tw_dev, request_id);
1164 tw_dev->srb[request_id]->result = (DID_OK << 16);
1165 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1166 }
1167 command_packet->byte8.param.sgl[0].address = param_value;
1168 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1169
1170 command_packet->size = 4;
1171 command_packet->request_id = request_id;
1172 command_packet->byte6.parameter_count = 1;
1173
1174 command_que_value = tw_dev->command_packet_physical_address[request_id];
1175 if (command_que_value == 0) {
1176 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet physical address.\n");
1177 return 1;
1178 }
1179
1180 /* Send command packet to the board */
1181 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1182
1183 /* Poll for completion */
1184 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1185 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1186 request_id = TW_RESID_OUT(response_queue.response_id);
1187
1188 if (request_id != 0) {
1189 /* unexpected request id */
1190 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Unexpected request id.\n");
1191 return 1;
1192 }
1193 if (command_packet->status != 0) {
1194 /* bad response */
1195 tw_decode_sense(tw_dev, request_id, 0);
1196 return 1;
1197 }
1198 }
1199
1200 return 0;
1201 } /* End tw_setfeature() */
1202
1203 /* This function will reset a controller */
1204 static int tw_reset_sequence(TW_Device_Extension *tw_dev)
1205 {
1206 int error = 0;
1207 int tries = 0;
1208 unsigned char c = 1;
1209
1210 /* Reset the board */
1211 while (tries < TW_MAX_RESET_TRIES) {
1212 TW_SOFT_RESET(tw_dev);
1213
1214 error = tw_aen_drain_queue(tw_dev);
1215 if (error) {
1216 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN drain failed, retrying.\n", tw_dev->host->host_no);
1217 tries++;
1218 continue;
1219 }
1220
1221 /* Check for controller errors */
1222 if (tw_check_errors(tw_dev)) {
1223 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors found, retrying.\n", tw_dev->host->host_no);
1224 tries++;
1225 continue;
1226 }
1227
1228 /* Now the controller is in a good state */
1229 break;
1230 }
1231
1232 if (tries >= TW_MAX_RESET_TRIES) {
1233 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors, card not responding, check all cabling.\n", tw_dev->host->host_no);
1234 return 1;
1235 }
1236
1237 error = tw_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS);
1238 if (error) {
1239 printk(KERN_WARNING "3w-xxxx: scsi%d: Connection initialization failed.\n", tw_dev->host->host_no);
1240 return 1;
1241 }
1242
1243 error = tw_setfeature(tw_dev, 2, 1, &c);
1244 if (error) {
1245 printk(KERN_WARNING "3w-xxxx: Unable to set features for card, probable old firmware or card.\n");
1246 }
1247
1248 return 0;
1249 } /* End tw_reset_sequence() */
1250
1251 /* This function will initialize the fields of a device extension */
1252 static int tw_initialize_device_extension(TW_Device_Extension *tw_dev)
1253 {
1254 int i, error=0;
1255
1256 dprintk(KERN_NOTICE "3w-xxxx: tw_initialize_device_extension()\n");
1257
1258 /* Initialize command packet buffers */
1259 error = tw_allocate_memory(tw_dev, sizeof(TW_Command), 0);
1260 if (error) {
1261 printk(KERN_WARNING "3w-xxxx: Command packet memory allocation failed.\n");
1262 return 1;
1263 }
1264
1265 /* Initialize generic buffer */
1266 error = tw_allocate_memory(tw_dev, sizeof(TW_Sector), 1);
1267 if (error) {
1268 printk(KERN_WARNING "3w-xxxx: Generic memory allocation failed.\n");
1269 return 1;
1270 }
1271
1272 for (i=0;i<TW_Q_LENGTH;i++) {
1273 tw_dev->free_queue[i] = i;
1274 tw_dev->state[i] = TW_S_INITIAL;
1275 }
1276
1277 tw_dev->pending_head = TW_Q_START;
1278 tw_dev->pending_tail = TW_Q_START;
1279 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1280
1281 mutex_init(&tw_dev->ioctl_lock);
1282 init_waitqueue_head(&tw_dev->ioctl_wqueue);
1283
1284 return 0;
1285 } /* End tw_initialize_device_extension() */
1286
1287 /* This function will reset a device extension */
1288 static int tw_reset_device_extension(TW_Device_Extension *tw_dev)
1289 {
1290 int i = 0;
1291 struct scsi_cmnd *srb;
1292 unsigned long flags = 0;
1293
1294 dprintk(KERN_NOTICE "3w-xxxx: tw_reset_device_extension()\n");
1295
1296 set_bit(TW_IN_RESET, &tw_dev->flags);
1297 TW_DISABLE_INTERRUPTS(tw_dev);
1298 TW_MASK_COMMAND_INTERRUPT(tw_dev);
1299 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1300
1301 /* Abort all requests that are in progress */
1302 for (i=0;i<TW_Q_LENGTH;i++) {
1303 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1304 (tw_dev->state[i] != TW_S_INITIAL) &&
1305 (tw_dev->state[i] != TW_S_COMPLETED)) {
1306 srb = tw_dev->srb[i];
1307 if (srb != NULL) {
1308 srb->result = (DID_RESET << 16);
1309 scsi_dma_unmap(srb);
1310 srb->scsi_done(srb);
1311 }
1312 }
1313 }
1314
1315 /* Reset queues and counts */
1316 for (i=0;i<TW_Q_LENGTH;i++) {
1317 tw_dev->free_queue[i] = i;
1318 tw_dev->state[i] = TW_S_INITIAL;
1319 }
1320 tw_dev->free_head = TW_Q_START;
1321 tw_dev->free_tail = TW_Q_START;
1322 tw_dev->posted_request_count = 0;
1323 tw_dev->pending_request_count = 0;
1324 tw_dev->pending_head = TW_Q_START;
1325 tw_dev->pending_tail = TW_Q_START;
1326 tw_dev->reset_print = 0;
1327
1328 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1329
1330 if (tw_reset_sequence(tw_dev)) {
1331 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset sequence failed.\n", tw_dev->host->host_no);
1332 return 1;
1333 }
1334
1335 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
1336 clear_bit(TW_IN_RESET, &tw_dev->flags);
1337 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1338
1339 return 0;
1340 } /* End tw_reset_device_extension() */
1341
1342 /* This funciton returns unit geometry in cylinders/heads/sectors */
1343 static int tw_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev,
1344 sector_t capacity, int geom[])
1345 {
1346 int heads, sectors, cylinders;
1347 TW_Device_Extension *tw_dev;
1348
1349 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam()\n");
1350 tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
1351
1352 heads = 64;
1353 sectors = 32;
1354 cylinders = sector_div(capacity, heads * sectors);
1355
1356 if (capacity >= 0x200000) {
1357 heads = 255;
1358 sectors = 63;
1359 cylinders = sector_div(capacity, heads * sectors);
1360 }
1361
1362 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam(): heads = %d, sectors = %d, cylinders = %d\n", heads, sectors, cylinders);
1363 geom[0] = heads;
1364 geom[1] = sectors;
1365 geom[2] = cylinders;
1366
1367 return 0;
1368 } /* End tw_scsi_biosparam() */
1369
1370 /* This is the new scsi eh reset function */
1371 static int tw_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1372 {
1373 TW_Device_Extension *tw_dev=NULL;
1374 int retval = FAILED;
1375
1376 tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1377
1378 tw_dev->num_resets++;
1379
1380 sdev_printk(KERN_WARNING, SCpnt->device,
1381 "WARNING: Command (0x%x) timed out, resetting card.\n",
1382 SCpnt->cmnd[0]);
1383
1384 /* Make sure we are not issuing an ioctl or resetting from ioctl */
1385 mutex_lock(&tw_dev->ioctl_lock);
1386
1387 /* Now reset the card and some of the device extension data */
1388 if (tw_reset_device_extension(tw_dev)) {
1389 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset failed.\n", tw_dev->host->host_no);
1390 goto out;
1391 }
1392
1393 retval = SUCCESS;
1394 out:
1395 mutex_unlock(&tw_dev->ioctl_lock);
1396 return retval;
1397 } /* End tw_scsi_eh_reset() */
1398
1399 /* This function handles scsi inquiry commands */
1400 static int tw_scsiop_inquiry(TW_Device_Extension *tw_dev, int request_id)
1401 {
1402 TW_Param *param;
1403 TW_Command *command_packet;
1404 unsigned long command_que_value;
1405 unsigned long param_value;
1406
1407 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry()\n");
1408
1409 /* Initialize command packet */
1410 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1411 if (command_packet == NULL) {
1412 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet virtual address.\n");
1413 return 1;
1414 }
1415 memset(command_packet, 0, sizeof(TW_Sector));
1416 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1417 command_packet->size = 4;
1418 command_packet->request_id = request_id;
1419 command_packet->status = 0;
1420 command_packet->flags = 0;
1421 command_packet->byte6.parameter_count = 1;
1422
1423 /* Now setup the param */
1424 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1425 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment virtual address.\n");
1426 return 1;
1427 }
1428 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1429 memset(param, 0, sizeof(TW_Sector));
1430 param->table_id = 3; /* unit summary table */
1431 param->parameter_id = 3; /* unitsstatus parameter */
1432 param->parameter_size_bytes = TW_MAX_UNITS;
1433 param_value = tw_dev->alignment_physical_address[request_id];
1434 if (param_value == 0) {
1435 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment physical address.\n");
1436 return 1;
1437 }
1438
1439 command_packet->byte8.param.sgl[0].address = param_value;
1440 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1441 command_que_value = tw_dev->command_packet_physical_address[request_id];
1442 if (command_que_value == 0) {
1443 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet physical address.\n");
1444 return 1;
1445 }
1446
1447 /* Now try to post the command packet */
1448 tw_post_command_packet(tw_dev, request_id);
1449
1450 return 0;
1451 } /* End tw_scsiop_inquiry() */
1452
1453 static void tw_transfer_internal(TW_Device_Extension *tw_dev, int request_id,
1454 void *data, unsigned int len)
1455 {
1456 scsi_sg_copy_from_buffer(tw_dev->srb[request_id], data, len);
1457 }
1458
1459 /* This function is called by the isr to complete an inquiry command */
1460 static int tw_scsiop_inquiry_complete(TW_Device_Extension *tw_dev, int request_id)
1461 {
1462 unsigned char *is_unit_present;
1463 unsigned char request_buffer[36];
1464 TW_Param *param;
1465
1466 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry_complete()\n");
1467
1468 memset(request_buffer, 0, sizeof(request_buffer));
1469 request_buffer[0] = TYPE_DISK; /* Peripheral device type */
1470 request_buffer[1] = 0; /* Device type modifier */
1471 request_buffer[2] = 0; /* No ansi/iso compliance */
1472 request_buffer[4] = 31; /* Additional length */
1473 memcpy(&request_buffer[8], "3ware ", 8); /* Vendor ID */
1474 sprintf(&request_buffer[16], "Logical Disk %-2d ", tw_dev->srb[request_id]->device->id);
1475 memcpy(&request_buffer[32], TW_DRIVER_VERSION, 3);
1476 tw_transfer_internal(tw_dev, request_id, request_buffer,
1477 sizeof(request_buffer));
1478
1479 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1480 if (param == NULL) {
1481 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry_complete(): Bad alignment virtual address.\n");
1482 return 1;
1483 }
1484 is_unit_present = &(param->data[0]);
1485
1486 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1487 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1488 } else {
1489 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1490 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1491 return TW_ISR_DONT_RESULT;
1492 }
1493
1494 return 0;
1495 } /* End tw_scsiop_inquiry_complete() */
1496
1497 /* This function handles scsi mode_sense commands */
1498 static int tw_scsiop_mode_sense(TW_Device_Extension *tw_dev, int request_id)
1499 {
1500 TW_Param *param;
1501 TW_Command *command_packet;
1502 unsigned long command_que_value;
1503 unsigned long param_value;
1504
1505 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense()\n");
1506
1507 /* Only page control = 0, page code = 0x8 (cache page) supported */
1508 if (tw_dev->srb[request_id]->cmnd[2] != 0x8) {
1509 tw_dev->state[request_id] = TW_S_COMPLETED;
1510 tw_state_request_finish(tw_dev, request_id);
1511 tw_dev->srb[request_id]->result = (DID_OK << 16);
1512 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1513 return 0;
1514 }
1515
1516 /* Now read firmware cache setting for this unit */
1517 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1518 if (command_packet == NULL) {
1519 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet virtual address.\n");
1520 return 1;
1521 }
1522
1523 /* Setup the command packet */
1524 memset(command_packet, 0, sizeof(TW_Sector));
1525 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1526 command_packet->size = 4;
1527 command_packet->request_id = request_id;
1528 command_packet->status = 0;
1529 command_packet->flags = 0;
1530 command_packet->byte6.parameter_count = 1;
1531
1532 /* Setup the param */
1533 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1534 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment virtual address.\n");
1535 return 1;
1536 }
1537
1538 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1539 memset(param, 0, sizeof(TW_Sector));
1540 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE + tw_dev->srb[request_id]->device->id;
1541 param->parameter_id = 7; /* unit flags */
1542 param->parameter_size_bytes = 1;
1543 param_value = tw_dev->alignment_physical_address[request_id];
1544 if (param_value == 0) {
1545 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment physical address.\n");
1546 return 1;
1547 }
1548
1549 command_packet->byte8.param.sgl[0].address = param_value;
1550 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1551 command_que_value = tw_dev->command_packet_physical_address[request_id];
1552 if (command_que_value == 0) {
1553 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet physical address.\n");
1554 return 1;
1555 }
1556
1557 /* Now try to post the command packet */
1558 tw_post_command_packet(tw_dev, request_id);
1559
1560 return 0;
1561 } /* End tw_scsiop_mode_sense() */
1562
1563 /* This function is called by the isr to complete a mode sense command */
1564 static int tw_scsiop_mode_sense_complete(TW_Device_Extension *tw_dev, int request_id)
1565 {
1566 TW_Param *param;
1567 unsigned char *flags;
1568 unsigned char request_buffer[8];
1569
1570 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense_complete()\n");
1571
1572 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1573 if (param == NULL) {
1574 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense_complete(): Bad alignment virtual address.\n");
1575 return 1;
1576 }
1577 flags = (char *)&(param->data[0]);
1578 memset(request_buffer, 0, sizeof(request_buffer));
1579
1580 request_buffer[0] = 0xf; /* mode data length */
1581 request_buffer[1] = 0; /* default medium type */
1582 request_buffer[2] = 0x10; /* dpo/fua support on */
1583 request_buffer[3] = 0; /* no block descriptors */
1584 request_buffer[4] = 0x8; /* caching page */
1585 request_buffer[5] = 0xa; /* page length */
1586 if (*flags & 0x1)
1587 request_buffer[6] = 0x5; /* WCE on, RCD on */
1588 else
1589 request_buffer[6] = 0x1; /* WCE off, RCD on */
1590 tw_transfer_internal(tw_dev, request_id, request_buffer,
1591 sizeof(request_buffer));
1592
1593 return 0;
1594 } /* End tw_scsiop_mode_sense_complete() */
1595
1596 /* This function handles scsi read_capacity commands */
1597 static int tw_scsiop_read_capacity(TW_Device_Extension *tw_dev, int request_id)
1598 {
1599 TW_Param *param;
1600 TW_Command *command_packet;
1601 unsigned long command_que_value;
1602 unsigned long param_value;
1603
1604 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity()\n");
1605
1606 /* Initialize command packet */
1607 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1608
1609 if (command_packet == NULL) {
1610 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet virtual address.\n");
1611 return 1;
1612 }
1613 memset(command_packet, 0, sizeof(TW_Sector));
1614 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1615 command_packet->size = 4;
1616 command_packet->request_id = request_id;
1617 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1618 command_packet->status = 0;
1619 command_packet->flags = 0;
1620 command_packet->byte6.block_count = 1;
1621
1622 /* Now setup the param */
1623 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1624 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment virtual address.\n");
1625 return 1;
1626 }
1627 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1628 memset(param, 0, sizeof(TW_Sector));
1629 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE +
1630 tw_dev->srb[request_id]->device->id;
1631 param->parameter_id = 4; /* unitcapacity parameter */
1632 param->parameter_size_bytes = 4;
1633 param_value = tw_dev->alignment_physical_address[request_id];
1634 if (param_value == 0) {
1635 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment physical address.\n");
1636 return 1;
1637 }
1638
1639 command_packet->byte8.param.sgl[0].address = param_value;
1640 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1641 command_que_value = tw_dev->command_packet_physical_address[request_id];
1642 if (command_que_value == 0) {
1643 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet physical address.\n");
1644 return 1;
1645 }
1646
1647 /* Now try to post the command to the board */
1648 tw_post_command_packet(tw_dev, request_id);
1649
1650 return 0;
1651 } /* End tw_scsiop_read_capacity() */
1652
1653 /* This function is called by the isr to complete a readcapacity command */
1654 static int tw_scsiop_read_capacity_complete(TW_Device_Extension *tw_dev, int request_id)
1655 {
1656 unsigned char *param_data;
1657 u32 capacity;
1658 char buff[8];
1659 TW_Param *param;
1660
1661 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete()\n");
1662
1663 memset(buff, 0, sizeof(buff));
1664 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1665 if (param == NULL) {
1666 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_capacity_complete(): Bad alignment virtual address.\n");
1667 return 1;
1668 }
1669 param_data = &(param->data[0]);
1670
1671 capacity = (param_data[3] << 24) | (param_data[2] << 16) |
1672 (param_data[1] << 8) | param_data[0];
1673
1674 /* Subtract one sector to fix get last sector ioctl */
1675 capacity -= 1;
1676
1677 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete(): Capacity = 0x%x.\n", capacity);
1678
1679 /* Number of LBA's */
1680 buff[0] = (capacity >> 24);
1681 buff[1] = (capacity >> 16) & 0xff;
1682 buff[2] = (capacity >> 8) & 0xff;
1683 buff[3] = capacity & 0xff;
1684
1685 /* Block size in bytes (512) */
1686 buff[4] = (TW_BLOCK_SIZE >> 24);
1687 buff[5] = (TW_BLOCK_SIZE >> 16) & 0xff;
1688 buff[6] = (TW_BLOCK_SIZE >> 8) & 0xff;
1689 buff[7] = TW_BLOCK_SIZE & 0xff;
1690
1691 tw_transfer_internal(tw_dev, request_id, buff, sizeof(buff));
1692
1693 return 0;
1694 } /* End tw_scsiop_read_capacity_complete() */
1695
1696 /* This function handles scsi read or write commands */
1697 static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id)
1698 {
1699 TW_Command *command_packet;
1700 unsigned long command_que_value;
1701 u32 lba = 0x0, num_sectors = 0x0;
1702 int i, use_sg;
1703 struct scsi_cmnd *srb;
1704 struct scatterlist *sglist, *sg;
1705
1706 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write()\n");
1707
1708 srb = tw_dev->srb[request_id];
1709
1710 sglist = scsi_sglist(srb);
1711 if (!sglist) {
1712 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Request buffer NULL.\n");
1713 return 1;
1714 }
1715
1716 /* Initialize command packet */
1717 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1718 if (command_packet == NULL) {
1719 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): Bad command packet virtual address.\n");
1720 return 1;
1721 }
1722
1723 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == READ_10) {
1724 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_READ);
1725 } else {
1726 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_WRITE);
1727 }
1728
1729 command_packet->size = 3;
1730 command_packet->request_id = request_id;
1731 command_packet->unit__hostid = TW_UNITHOST_IN(0, srb->device->id);
1732 command_packet->status = 0;
1733 command_packet->flags = 0;
1734
1735 if (srb->cmnd[0] == WRITE_10) {
1736 if ((srb->cmnd[1] & 0x8) || (srb->cmnd[1] & 0x10))
1737 command_packet->flags = 1;
1738 }
1739
1740 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6) {
1741 lba = ((u32)srb->cmnd[1] << 16) | ((u32)srb->cmnd[2] << 8) | (u32)srb->cmnd[3];
1742 num_sectors = (u32)srb->cmnd[4];
1743 } else {
1744 lba = ((u32)srb->cmnd[2] << 24) | ((u32)srb->cmnd[3] << 16) | ((u32)srb->cmnd[4] << 8) | (u32)srb->cmnd[5];
1745 num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
1746 }
1747
1748 /* Update sector statistic */
1749 tw_dev->sector_count = num_sectors;
1750 if (tw_dev->sector_count > tw_dev->max_sector_count)
1751 tw_dev->max_sector_count = tw_dev->sector_count;
1752
1753 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): lba = 0x%x num_sectors = 0x%x\n", lba, num_sectors);
1754 command_packet->byte8.io.lba = lba;
1755 command_packet->byte6.block_count = num_sectors;
1756
1757 use_sg = scsi_dma_map(srb);
1758 if (use_sg <= 0)
1759 return 1;
1760
1761 scsi_for_each_sg(tw_dev->srb[request_id], sg, use_sg, i) {
1762 command_packet->byte8.io.sgl[i].address = sg_dma_address(sg);
1763 command_packet->byte8.io.sgl[i].length = sg_dma_len(sg);
1764 command_packet->size+=2;
1765 }
1766
1767 /* Update SG statistics */
1768 tw_dev->sgl_entries = scsi_sg_count(tw_dev->srb[request_id]);
1769 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
1770 tw_dev->max_sgl_entries = tw_dev->sgl_entries;
1771
1772 command_que_value = tw_dev->command_packet_physical_address[request_id];
1773 if (command_que_value == 0) {
1774 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Bad command packet physical address.\n");
1775 return 1;
1776 }
1777
1778 /* Now try to post the command to the board */
1779 tw_post_command_packet(tw_dev, request_id);
1780
1781 return 0;
1782 } /* End tw_scsiop_read_write() */
1783
1784 /* This function will handle the request sense scsi command */
1785 static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id)
1786 {
1787 char request_buffer[18];
1788
1789 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n");
1790
1791 memset(request_buffer, 0, sizeof(request_buffer));
1792 request_buffer[0] = 0x70; /* Immediate fixed format */
1793 request_buffer[7] = 10; /* minimum size per SPC: 18 bytes */
1794 /* leave all other fields zero, giving effectively NO_SENSE return */
1795 tw_transfer_internal(tw_dev, request_id, request_buffer,
1796 sizeof(request_buffer));
1797
1798 tw_dev->state[request_id] = TW_S_COMPLETED;
1799 tw_state_request_finish(tw_dev, request_id);
1800
1801 /* If we got a request_sense, we probably want a reset, return error */
1802 tw_dev->srb[request_id]->result = (DID_ERROR << 16);
1803 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1804
1805 return 0;
1806 } /* End tw_scsiop_request_sense() */
1807
1808 /* This function will handle synchronize cache scsi command */
1809 static int tw_scsiop_synchronize_cache(TW_Device_Extension *tw_dev, int request_id)
1810 {
1811 TW_Command *command_packet;
1812 unsigned long command_que_value;
1813
1814 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_synchronize_cache()\n");
1815
1816 /* Send firmware flush command for this unit */
1817 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1818 if (command_packet == NULL) {
1819 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet virtual address.\n");
1820 return 1;
1821 }
1822
1823 /* Setup the command packet */
1824 memset(command_packet, 0, sizeof(TW_Sector));
1825 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_FLUSH_CACHE);
1826 command_packet->size = 2;
1827 command_packet->request_id = request_id;
1828 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1829 command_packet->status = 0;
1830 command_packet->flags = 0;
1831 command_packet->byte6.parameter_count = 1;
1832 command_que_value = tw_dev->command_packet_physical_address[request_id];
1833 if (command_que_value == 0) {
1834 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet physical address.\n");
1835 return 1;
1836 }
1837
1838 /* Now try to post the command packet */
1839 tw_post_command_packet(tw_dev, request_id);
1840
1841 return 0;
1842 } /* End tw_scsiop_synchronize_cache() */
1843
1844 /* This function will handle test unit ready scsi command */
1845 static int tw_scsiop_test_unit_ready(TW_Device_Extension *tw_dev, int request_id)
1846 {
1847 TW_Param *param;
1848 TW_Command *command_packet;
1849 unsigned long command_que_value;
1850 unsigned long param_value;
1851
1852 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_test_unit_ready()\n");
1853
1854 /* Initialize command packet */
1855 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1856 if (command_packet == NULL) {
1857 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet virtual address.\n");
1858 return 1;
1859 }
1860 memset(command_packet, 0, sizeof(TW_Sector));
1861 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1862 command_packet->size = 4;
1863 command_packet->request_id = request_id;
1864 command_packet->status = 0;
1865 command_packet->flags = 0;
1866 command_packet->byte6.parameter_count = 1;
1867
1868 /* Now setup the param */
1869 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1870 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment virtual address.\n");
1871 return 1;
1872 }
1873 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1874 memset(param, 0, sizeof(TW_Sector));
1875 param->table_id = 3; /* unit summary table */
1876 param->parameter_id = 3; /* unitsstatus parameter */
1877 param->parameter_size_bytes = TW_MAX_UNITS;
1878 param_value = tw_dev->alignment_physical_address[request_id];
1879 if (param_value == 0) {
1880 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment physical address.\n");
1881 return 1;
1882 }
1883
1884 command_packet->byte8.param.sgl[0].address = param_value;
1885 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1886 command_que_value = tw_dev->command_packet_physical_address[request_id];
1887 if (command_que_value == 0) {
1888 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet physical address.\n");
1889 return 1;
1890 }
1891
1892 /* Now try to post the command packet */
1893 tw_post_command_packet(tw_dev, request_id);
1894
1895 return 0;
1896 } /* End tw_scsiop_test_unit_ready() */
1897
1898 /* This function is called by the isr to complete a testunitready command */
1899 static int tw_scsiop_test_unit_ready_complete(TW_Device_Extension *tw_dev, int request_id)
1900 {
1901 unsigned char *is_unit_present;
1902 TW_Param *param;
1903
1904 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete()\n");
1905
1906 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1907 if (param == NULL) {
1908 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete(): Bad alignment virtual address.\n");
1909 return 1;
1910 }
1911 is_unit_present = &(param->data[0]);
1912
1913 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1914 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1915 } else {
1916 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1917 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1918 return TW_ISR_DONT_RESULT;
1919 }
1920
1921 return 0;
1922 } /* End tw_scsiop_test_unit_ready_complete() */
1923
1924 /* This is the main scsi queue function to handle scsi opcodes */
1925 static int tw_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
1926 {
1927 unsigned char *command = SCpnt->cmnd;
1928 int request_id = 0;
1929 int retval = 1;
1930 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1931
1932 /* If we are resetting due to timed out ioctl, report as busy */
1933 if (test_bit(TW_IN_RESET, &tw_dev->flags))
1934 return SCSI_MLQUEUE_HOST_BUSY;
1935
1936 /* Save done function into struct scsi_cmnd */
1937 SCpnt->scsi_done = done;
1938
1939 /* Queue the command and get a request id */
1940 tw_state_request_start(tw_dev, &request_id);
1941
1942 /* Save the scsi command for use by the ISR */
1943 tw_dev->srb[request_id] = SCpnt;
1944
1945 switch (*command) {
1946 case READ_10:
1947 case READ_6:
1948 case WRITE_10:
1949 case WRITE_6:
1950 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ/WRITE.\n");
1951 retval = tw_scsiop_read_write(tw_dev, request_id);
1952 break;
1953 case TEST_UNIT_READY:
1954 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught TEST_UNIT_READY.\n");
1955 retval = tw_scsiop_test_unit_ready(tw_dev, request_id);
1956 break;
1957 case INQUIRY:
1958 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught INQUIRY.\n");
1959 retval = tw_scsiop_inquiry(tw_dev, request_id);
1960 break;
1961 case READ_CAPACITY:
1962 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ_CAPACITY.\n");
1963 retval = tw_scsiop_read_capacity(tw_dev, request_id);
1964 break;
1965 case REQUEST_SENSE:
1966 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught REQUEST_SENSE.\n");
1967 retval = tw_scsiop_request_sense(tw_dev, request_id);
1968 break;
1969 case MODE_SENSE:
1970 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught MODE_SENSE.\n");
1971 retval = tw_scsiop_mode_sense(tw_dev, request_id);
1972 break;
1973 case SYNCHRONIZE_CACHE:
1974 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught SYNCHRONIZE_CACHE.\n");
1975 retval = tw_scsiop_synchronize_cache(tw_dev, request_id);
1976 break;
1977 case TW_IOCTL:
1978 printk(KERN_WARNING "3w-xxxx: SCSI_IOCTL_SEND_COMMAND deprecated, please update your 3ware tools.\n");
1979 break;
1980 default:
1981 printk(KERN_NOTICE "3w-xxxx: scsi%d: Unknown scsi opcode: 0x%x\n", tw_dev->host->host_no, *command);
1982 tw_dev->state[request_id] = TW_S_COMPLETED;
1983 tw_state_request_finish(tw_dev, request_id);
1984 SCpnt->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1985 scsi_build_sense_buffer(1, SCpnt->sense_buffer, ILLEGAL_REQUEST, 0x20, 0);
1986 done(SCpnt);
1987 retval = 0;
1988 }
1989 if (retval) {
1990 tw_dev->state[request_id] = TW_S_COMPLETED;
1991 tw_state_request_finish(tw_dev, request_id);
1992 SCpnt->result = (DID_ERROR << 16);
1993 done(SCpnt);
1994 retval = 0;
1995 }
1996 return retval;
1997 } /* End tw_scsi_queue() */
1998
1999 static DEF_SCSI_QCMD(tw_scsi_queue)
2000
2001 /* This function is the interrupt service routine */
2002 static irqreturn_t tw_interrupt(int irq, void *dev_instance)
2003 {
2004 int request_id;
2005 u32 status_reg_value;
2006 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
2007 TW_Response_Queue response_que;
2008 int error = 0, retval = 0;
2009 TW_Command *command_packet;
2010 int handled = 0;
2011
2012 /* Get the host lock for io completions */
2013 spin_lock(tw_dev->host->host_lock);
2014
2015 /* Read the registers */
2016 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2017
2018 /* Check if this is our interrupt, otherwise bail */
2019 if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
2020 goto tw_interrupt_bail;
2021
2022 handled = 1;
2023
2024 /* If we are resetting, bail */
2025 if (test_bit(TW_IN_RESET, &tw_dev->flags))
2026 goto tw_interrupt_bail;
2027
2028 /* Check controller for errors */
2029 if (tw_check_bits(status_reg_value)) {
2030 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2031 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2032 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2033 goto tw_interrupt_bail;
2034 }
2035 }
2036
2037 /* Handle host interrupt */
2038 if (status_reg_value & TW_STATUS_HOST_INTERRUPT) {
2039 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received host interrupt.\n");
2040 TW_CLEAR_HOST_INTERRUPT(tw_dev);
2041 }
2042
2043 /* Handle attention interrupt */
2044 if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
2045 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received attention interrupt.\n");
2046 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
2047 tw_state_request_start(tw_dev, &request_id);
2048 error = tw_aen_read_queue(tw_dev, request_id);
2049 if (error) {
2050 printk(KERN_WARNING "3w-xxxx: scsi%d: Error reading aen queue.\n", tw_dev->host->host_no);
2051 tw_dev->state[request_id] = TW_S_COMPLETED;
2052 tw_state_request_finish(tw_dev, request_id);
2053 }
2054 }
2055
2056 /* Handle command interrupt */
2057 if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
2058 /* Drain as many pending commands as we can */
2059 while (tw_dev->pending_request_count > 0) {
2060 request_id = tw_dev->pending_queue[tw_dev->pending_head];
2061 if (tw_dev->state[request_id] != TW_S_PENDING) {
2062 printk(KERN_WARNING "3w-xxxx: scsi%d: Found request id that wasn't pending.\n", tw_dev->host->host_no);
2063 break;
2064 }
2065 if (tw_post_command_packet(tw_dev, request_id)==0) {
2066 if (tw_dev->pending_head == TW_Q_LENGTH-1) {
2067 tw_dev->pending_head = TW_Q_START;
2068 } else {
2069 tw_dev->pending_head = tw_dev->pending_head + 1;
2070 }
2071 tw_dev->pending_request_count--;
2072 } else {
2073 /* If we get here, we will continue re-posting on the next command interrupt */
2074 break;
2075 }
2076 }
2077 /* If there are no more pending requests, we mask command interrupt */
2078 if (tw_dev->pending_request_count == 0)
2079 TW_MASK_COMMAND_INTERRUPT(tw_dev);
2080 }
2081
2082 /* Handle response interrupt */
2083 if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
2084 /* Drain the response queue from the board */
2085 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
2086 /* Read response queue register */
2087 response_que.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
2088 request_id = TW_RESID_OUT(response_que.response_id);
2089 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
2090 error = 0;
2091
2092 /* Check for bad response */
2093 if (command_packet->status != 0) {
2094 /* If internal command, don't error, don't fill sense */
2095 if (tw_dev->srb[request_id] == NULL) {
2096 tw_decode_sense(tw_dev, request_id, 0);
2097 } else {
2098 error = tw_decode_sense(tw_dev, request_id, 1);
2099 }
2100 }
2101
2102 /* Check for correct state */
2103 if (tw_dev->state[request_id] != TW_S_POSTED) {
2104 if (tw_dev->srb[request_id] != NULL) {
2105 printk(KERN_WARNING "3w-xxxx: scsi%d: Received a request id that wasn't posted.\n", tw_dev->host->host_no);
2106 error = 1;
2107 }
2108 }
2109
2110 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Response queue request id: %d.\n", request_id);
2111
2112 /* Check for internal command completion */
2113 if (tw_dev->srb[request_id] == NULL) {
2114 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Found internally posted command.\n");
2115 /* Check for chrdev ioctl completion */
2116 if (request_id != tw_dev->chrdev_request_id) {
2117 retval = tw_aen_complete(tw_dev, request_id);
2118 if (retval) {
2119 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing aen.\n", tw_dev->host->host_no);
2120 }
2121 } else {
2122 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
2123 wake_up(&tw_dev->ioctl_wqueue);
2124 }
2125 } else {
2126 switch (tw_dev->srb[request_id]->cmnd[0]) {
2127 case READ_10:
2128 case READ_6:
2129 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_10/READ_6\n");
2130 break;
2131 case WRITE_10:
2132 case WRITE_6:
2133 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught WRITE_10/WRITE_6\n");
2134 break;
2135 case TEST_UNIT_READY:
2136 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught TEST_UNIT_READY\n");
2137 error = tw_scsiop_test_unit_ready_complete(tw_dev, request_id);
2138 break;
2139 case INQUIRY:
2140 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught INQUIRY\n");
2141 error = tw_scsiop_inquiry_complete(tw_dev, request_id);
2142 break;
2143 case READ_CAPACITY:
2144 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_CAPACITY\n");
2145 error = tw_scsiop_read_capacity_complete(tw_dev, request_id);
2146 break;
2147 case MODE_SENSE:
2148 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught MODE_SENSE\n");
2149 error = tw_scsiop_mode_sense_complete(tw_dev, request_id);
2150 break;
2151 case SYNCHRONIZE_CACHE:
2152 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught SYNCHRONIZE_CACHE\n");
2153 break;
2154 default:
2155 printk(KERN_WARNING "3w-xxxx: case slip in tw_interrupt()\n");
2156 error = 1;
2157 }
2158
2159 /* If no error command was a success */
2160 if (error == 0) {
2161 tw_dev->srb[request_id]->result = (DID_OK << 16);
2162 }
2163
2164 /* If error, command failed */
2165 if (error == 1) {
2166 /* Ask for a host reset */
2167 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
2168 }
2169
2170 /* Now complete the io */
2171 if ((error != TW_ISR_DONT_COMPLETE)) {
2172 scsi_dma_unmap(tw_dev->srb[request_id]);
2173 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
2174 tw_dev->state[request_id] = TW_S_COMPLETED;
2175 tw_state_request_finish(tw_dev, request_id);
2176 tw_dev->posted_request_count--;
2177 }
2178 }
2179
2180 /* Check for valid status after each drain */
2181 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2182 if (tw_check_bits(status_reg_value)) {
2183 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2184 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2185 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2186 goto tw_interrupt_bail;
2187 }
2188 }
2189 }
2190 }
2191
2192 tw_interrupt_bail:
2193 spin_unlock(tw_dev->host->host_lock);
2194 return IRQ_RETVAL(handled);
2195 } /* End tw_interrupt() */
2196
2197 /* This function tells the controller to shut down */
2198 static void __tw_shutdown(TW_Device_Extension *tw_dev)
2199 {
2200 /* Disable interrupts */
2201 TW_DISABLE_INTERRUPTS(tw_dev);
2202
2203 /* Free up the IRQ */
2204 free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
2205
2206 printk(KERN_WARNING "3w-xxxx: Shutting down host %d.\n", tw_dev->host->host_no);
2207
2208 /* Tell the card we are shutting down */
2209 if (tw_initconnection(tw_dev, 1)) {
2210 printk(KERN_WARNING "3w-xxxx: Connection shutdown failed.\n");
2211 } else {
2212 printk(KERN_WARNING "3w-xxxx: Shutdown complete.\n");
2213 }
2214
2215 /* Clear all interrupts just before exit */
2216 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2217 } /* End __tw_shutdown() */
2218
2219 /* Wrapper for __tw_shutdown */
2220 static void tw_shutdown(struct pci_dev *pdev)
2221 {
2222 struct Scsi_Host *host = pci_get_drvdata(pdev);
2223 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2224
2225 __tw_shutdown(tw_dev);
2226 } /* End tw_shutdown() */
2227
2228 /* This function gets called when a disk is coming online */
2229 static int tw_slave_configure(struct scsi_device *sdev)
2230 {
2231 /* Force 60 second timeout */
2232 blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
2233
2234 return 0;
2235 } /* End tw_slave_configure() */
2236
2237 static struct scsi_host_template driver_template = {
2238 .module = THIS_MODULE,
2239 .name = "3ware Storage Controller",
2240 .queuecommand = tw_scsi_queue,
2241 .eh_host_reset_handler = tw_scsi_eh_reset,
2242 .bios_param = tw_scsi_biosparam,
2243 .change_queue_depth = scsi_change_queue_depth,
2244 .can_queue = TW_Q_LENGTH-2,
2245 .slave_configure = tw_slave_configure,
2246 .this_id = -1,
2247 .sg_tablesize = TW_MAX_SGL_LENGTH,
2248 .max_sectors = TW_MAX_SECTORS,
2249 .cmd_per_lun = TW_MAX_CMDS_PER_LUN,
2250 .shost_attrs = tw_host_attrs,
2251 .emulated = 1,
2252 .no_write_same = 1,
2253 };
2254
2255 /* This function will probe and initialize a card */
2256 static int tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
2257 {
2258 struct Scsi_Host *host = NULL;
2259 TW_Device_Extension *tw_dev;
2260 int retval = -ENODEV;
2261
2262 retval = pci_enable_device(pdev);
2263 if (retval) {
2264 printk(KERN_WARNING "3w-xxxx: Failed to enable pci device.");
2265 goto out_disable_device;
2266 }
2267
2268 pci_set_master(pdev);
2269
2270 retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2271 if (retval) {
2272 printk(KERN_WARNING "3w-xxxx: Failed to set dma mask.");
2273 goto out_disable_device;
2274 }
2275
2276 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2277 if (!host) {
2278 printk(KERN_WARNING "3w-xxxx: Failed to allocate memory for device extension.");
2279 retval = -ENOMEM;
2280 goto out_disable_device;
2281 }
2282 tw_dev = (TW_Device_Extension *)host->hostdata;
2283
2284 /* Save values to device extension */
2285 tw_dev->host = host;
2286 tw_dev->tw_pci_dev = pdev;
2287
2288 if (tw_initialize_device_extension(tw_dev)) {
2289 printk(KERN_WARNING "3w-xxxx: Failed to initialize device extension.");
2290 retval = -ENOMEM;
2291 goto out_free_device_extension;
2292 }
2293
2294 /* Request IO regions */
2295 retval = pci_request_regions(pdev, "3w-xxxx");
2296 if (retval) {
2297 printk(KERN_WARNING "3w-xxxx: Failed to get mem region.");
2298 goto out_free_device_extension;
2299 }
2300
2301 /* Save base address */
2302 tw_dev->base_addr = pci_resource_start(pdev, 0);
2303 if (!tw_dev->base_addr) {
2304 printk(KERN_WARNING "3w-xxxx: Failed to get io address.");
2305 retval = -ENOMEM;
2306 goto out_release_mem_region;
2307 }
2308
2309 /* Disable interrupts on the card */
2310 TW_DISABLE_INTERRUPTS(tw_dev);
2311
2312 /* Initialize the card */
2313 if (tw_reset_sequence(tw_dev))
2314 goto out_release_mem_region;
2315
2316 /* Set host specific parameters */
2317 host->max_id = TW_MAX_UNITS;
2318 host->max_cmd_len = TW_MAX_CDB_LEN;
2319
2320 /* Luns and channels aren't supported by adapter */
2321 host->max_lun = 0;
2322 host->max_channel = 0;
2323
2324 /* Register the card with the kernel SCSI layer */
2325 retval = scsi_add_host(host, &pdev->dev);
2326 if (retval) {
2327 printk(KERN_WARNING "3w-xxxx: scsi add host failed");
2328 goto out_release_mem_region;
2329 }
2330
2331 pci_set_drvdata(pdev, host);
2332
2333 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);
2334
2335 /* Now setup the interrupt handler */
2336 retval = request_irq(pdev->irq, tw_interrupt, IRQF_SHARED, "3w-xxxx", tw_dev);
2337 if (retval) {
2338 printk(KERN_WARNING "3w-xxxx: Error requesting IRQ.");
2339 goto out_remove_host;
2340 }
2341
2342 tw_device_extension_list[tw_device_extension_count] = tw_dev;
2343 tw_device_extension_count++;
2344
2345 /* Re-enable interrupts on the card */
2346 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2347
2348 /* Finally, scan the host */
2349 scsi_scan_host(host);
2350
2351 if (twe_major == -1) {
2352 if ((twe_major = register_chrdev (0, "twe", &tw_fops)) < 0)
2353 printk(KERN_WARNING "3w-xxxx: Failed to register character device.");
2354 }
2355 return 0;
2356
2357 out_remove_host:
2358 scsi_remove_host(host);
2359 out_release_mem_region:
2360 pci_release_regions(pdev);
2361 out_free_device_extension:
2362 tw_free_device_extension(tw_dev);
2363 scsi_host_put(host);
2364 out_disable_device:
2365 pci_disable_device(pdev);
2366
2367 return retval;
2368 } /* End tw_probe() */
2369
2370 /* This function is called to remove a device */
2371 static void tw_remove(struct pci_dev *pdev)
2372 {
2373 struct Scsi_Host *host = pci_get_drvdata(pdev);
2374 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2375
2376 scsi_remove_host(tw_dev->host);
2377
2378 /* Unregister character device */
2379 if (twe_major >= 0) {
2380 unregister_chrdev(twe_major, "twe");
2381 twe_major = -1;
2382 }
2383
2384 /* Shutdown the card */
2385 __tw_shutdown(tw_dev);
2386
2387 /* Free up the mem region */
2388 pci_release_regions(pdev);
2389
2390 /* Free up device extension resources */
2391 tw_free_device_extension(tw_dev);
2392
2393 scsi_host_put(tw_dev->host);
2394 pci_disable_device(pdev);
2395 tw_device_extension_count--;
2396 } /* End tw_remove() */
2397
2398 /* PCI Devices supported by this driver */
2399 static struct pci_device_id tw_pci_tbl[] = {
2400 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_1000,
2401 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2402 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_7000,
2403 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2404 { }
2405 };
2406 MODULE_DEVICE_TABLE(pci, tw_pci_tbl);
2407
2408 /* pci_driver initializer */
2409 static struct pci_driver tw_driver = {
2410 .name = "3w-xxxx",
2411 .id_table = tw_pci_tbl,
2412 .probe = tw_probe,
2413 .remove = tw_remove,
2414 .shutdown = tw_shutdown,
2415 };
2416
2417 /* This function is called on driver initialization */
2418 static int __init tw_init(void)
2419 {
2420 printk(KERN_WARNING "3ware Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2421
2422 return pci_register_driver(&tw_driver);
2423 } /* End tw_init() */
2424
2425 /* This function is called on driver exit */
2426 static void __exit tw_exit(void)
2427 {
2428 pci_unregister_driver(&tw_driver);
2429 } /* End tw_exit() */
2430
2431 module_init(tw_init);
2432 module_exit(tw_exit);
2433
Linux with added FPC-III support