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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / scsi / 3w-xxxx.c
blobfb6444d0409cfeaad58433fe1d34f0bd865bdb9e
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 .compat_ioctl = compat_ptr_ioctl,
1053 .open = tw_chrdev_open,
1054 .release = NULL,
1055 .llseek = noop_llseek,
1056 };
1057
1058 /* This function will free up device extension resources */
1059 static void tw_free_device_extension(TW_Device_Extension *tw_dev)
1060 {
1061 dprintk(KERN_NOTICE "3w-xxxx: tw_free_device_extension()\n");
1062
1063 /* Free command packet and generic buffer memory */
1064 if (tw_dev->command_packet_virtual_address[0])
1065 dma_free_coherent(&tw_dev->tw_pci_dev->dev,
1066 sizeof(TW_Command) * TW_Q_LENGTH,
1067 tw_dev->command_packet_virtual_address[0],
1068 tw_dev->command_packet_physical_address[0]);
1069
1070 if (tw_dev->alignment_virtual_address[0])
1071 dma_free_coherent(&tw_dev->tw_pci_dev->dev,
1072 sizeof(TW_Sector) * TW_Q_LENGTH,
1073 tw_dev->alignment_virtual_address[0],
1074 tw_dev->alignment_physical_address[0]);
1075 } /* End tw_free_device_extension() */
1076
1077 /* This function will send an initconnection command to controller */
1078 static int tw_initconnection(TW_Device_Extension *tw_dev, int message_credits)
1079 {
1080 unsigned long command_que_value;
1081 TW_Command *command_packet;
1082 TW_Response_Queue response_queue;
1083 int request_id = 0;
1084
1085 dprintk(KERN_NOTICE "3w-xxxx: tw_initconnection()\n");
1086
1087 /* Initialize InitConnection command packet */
1088 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1089 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet virtual address.\n");
1090 return 1;
1091 }
1092
1093 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1094 memset(command_packet, 0, sizeof(TW_Sector));
1095 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_INIT_CONNECTION);
1096 command_packet->size = TW_INIT_COMMAND_PACKET_SIZE;
1097 command_packet->request_id = request_id;
1098 command_packet->status = 0x0;
1099 command_packet->flags = 0x0;
1100 command_packet->byte6.message_credits = message_credits;
1101 command_packet->byte8.init_connection.response_queue_pointer = 0x0;
1102 command_que_value = tw_dev->command_packet_physical_address[request_id];
1103
1104 if (command_que_value == 0) {
1105 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet physical address.\n");
1106 return 1;
1107 }
1108
1109 /* Send command packet to the board */
1110 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1111
1112 /* Poll for completion */
1113 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1114 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1115 request_id = TW_RESID_OUT(response_queue.response_id);
1116
1117 if (request_id != 0) {
1118 /* unexpected request id */
1119 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Unexpected request id.\n");
1120 return 1;
1121 }
1122 if (command_packet->status != 0) {
1123 /* bad response */
1124 tw_decode_sense(tw_dev, request_id, 0);
1125 return 1;
1126 }
1127 }
1128 return 0;
1129 } /* End tw_initconnection() */
1130
1131 /* Set a value in the features table */
1132 static int tw_setfeature(TW_Device_Extension *tw_dev, int parm, int param_size,
1133 unsigned char *val)
1134 {
1135 TW_Param *param;
1136 TW_Command *command_packet;
1137 TW_Response_Queue response_queue;
1138 int request_id = 0;
1139 unsigned long command_que_value;
1140 unsigned long param_value;
1141
1142 /* Initialize SetParam command packet */
1143 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1144 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet virtual address.\n");
1145 return 1;
1146 }
1147 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1148 memset(command_packet, 0, sizeof(TW_Sector));
1149 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1150
1151 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
1152 param->table_id = 0x404; /* Features table */
1153 param->parameter_id = parm;
1154 param->parameter_size_bytes = param_size;
1155 memcpy(param->data, val, param_size);
1156
1157 param_value = tw_dev->alignment_physical_address[request_id];
1158 if (param_value == 0) {
1159 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad alignment physical address.\n");
1160 tw_dev->state[request_id] = TW_S_COMPLETED;
1161 tw_state_request_finish(tw_dev, request_id);
1162 tw_dev->srb[request_id]->result = (DID_OK << 16);
1163 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1164 }
1165 command_packet->byte8.param.sgl[0].address = param_value;
1166 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1167
1168 command_packet->size = 4;
1169 command_packet->request_id = request_id;
1170 command_packet->byte6.parameter_count = 1;
1171
1172 command_que_value = tw_dev->command_packet_physical_address[request_id];
1173 if (command_que_value == 0) {
1174 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet physical address.\n");
1175 return 1;
1176 }
1177
1178 /* Send command packet to the board */
1179 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1180
1181 /* Poll for completion */
1182 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1183 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1184 request_id = TW_RESID_OUT(response_queue.response_id);
1185
1186 if (request_id != 0) {
1187 /* unexpected request id */
1188 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Unexpected request id.\n");
1189 return 1;
1190 }
1191 if (command_packet->status != 0) {
1192 /* bad response */
1193 tw_decode_sense(tw_dev, request_id, 0);
1194 return 1;
1195 }
1196 }
1197
1198 return 0;
1199 } /* End tw_setfeature() */
1200
1201 /* This function will reset a controller */
1202 static int tw_reset_sequence(TW_Device_Extension *tw_dev)
1203 {
1204 int error = 0;
1205 int tries = 0;
1206 unsigned char c = 1;
1207
1208 /* Reset the board */
1209 while (tries < TW_MAX_RESET_TRIES) {
1210 TW_SOFT_RESET(tw_dev);
1211
1212 error = tw_aen_drain_queue(tw_dev);
1213 if (error) {
1214 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN drain failed, retrying.\n", tw_dev->host->host_no);
1215 tries++;
1216 continue;
1217 }
1218
1219 /* Check for controller errors */
1220 if (tw_check_errors(tw_dev)) {
1221 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors found, retrying.\n", tw_dev->host->host_no);
1222 tries++;
1223 continue;
1224 }
1225
1226 /* Now the controller is in a good state */
1227 break;
1228 }
1229
1230 if (tries >= TW_MAX_RESET_TRIES) {
1231 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors, card not responding, check all cabling.\n", tw_dev->host->host_no);
1232 return 1;
1233 }
1234
1235 error = tw_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS);
1236 if (error) {
1237 printk(KERN_WARNING "3w-xxxx: scsi%d: Connection initialization failed.\n", tw_dev->host->host_no);
1238 return 1;
1239 }
1240
1241 error = tw_setfeature(tw_dev, 2, 1, &c);
1242 if (error) {
1243 printk(KERN_WARNING "3w-xxxx: Unable to set features for card, probable old firmware or card.\n");
1244 }
1245
1246 return 0;
1247 } /* End tw_reset_sequence() */
1248
1249 /* This function will initialize the fields of a device extension */
1250 static int tw_initialize_device_extension(TW_Device_Extension *tw_dev)
1251 {
1252 int i, error=0;
1253
1254 dprintk(KERN_NOTICE "3w-xxxx: tw_initialize_device_extension()\n");
1255
1256 /* Initialize command packet buffers */
1257 error = tw_allocate_memory(tw_dev, sizeof(TW_Command), 0);
1258 if (error) {
1259 printk(KERN_WARNING "3w-xxxx: Command packet memory allocation failed.\n");
1260 return 1;
1261 }
1262
1263 /* Initialize generic buffer */
1264 error = tw_allocate_memory(tw_dev, sizeof(TW_Sector), 1);
1265 if (error) {
1266 printk(KERN_WARNING "3w-xxxx: Generic memory allocation failed.\n");
1267 return 1;
1268 }
1269
1270 for (i=0;i<TW_Q_LENGTH;i++) {
1271 tw_dev->free_queue[i] = i;
1272 tw_dev->state[i] = TW_S_INITIAL;
1273 }
1274
1275 tw_dev->pending_head = TW_Q_START;
1276 tw_dev->pending_tail = TW_Q_START;
1277 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1278
1279 mutex_init(&tw_dev->ioctl_lock);
1280 init_waitqueue_head(&tw_dev->ioctl_wqueue);
1281
1282 return 0;
1283 } /* End tw_initialize_device_extension() */
1284
1285 /* This function will reset a device extension */
1286 static int tw_reset_device_extension(TW_Device_Extension *tw_dev)
1287 {
1288 int i = 0;
1289 struct scsi_cmnd *srb;
1290 unsigned long flags = 0;
1291
1292 dprintk(KERN_NOTICE "3w-xxxx: tw_reset_device_extension()\n");
1293
1294 set_bit(TW_IN_RESET, &tw_dev->flags);
1295 TW_DISABLE_INTERRUPTS(tw_dev);
1296 TW_MASK_COMMAND_INTERRUPT(tw_dev);
1297 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1298
1299 /* Abort all requests that are in progress */
1300 for (i=0;i<TW_Q_LENGTH;i++) {
1301 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1302 (tw_dev->state[i] != TW_S_INITIAL) &&
1303 (tw_dev->state[i] != TW_S_COMPLETED)) {
1304 srb = tw_dev->srb[i];
1305 if (srb != NULL) {
1306 srb->result = (DID_RESET << 16);
1307 scsi_dma_unmap(srb);
1308 srb->scsi_done(srb);
1309 }
1310 }
1311 }
1312
1313 /* Reset queues and counts */
1314 for (i=0;i<TW_Q_LENGTH;i++) {
1315 tw_dev->free_queue[i] = i;
1316 tw_dev->state[i] = TW_S_INITIAL;
1317 }
1318 tw_dev->free_head = TW_Q_START;
1319 tw_dev->free_tail = TW_Q_START;
1320 tw_dev->posted_request_count = 0;
1321 tw_dev->pending_request_count = 0;
1322 tw_dev->pending_head = TW_Q_START;
1323 tw_dev->pending_tail = TW_Q_START;
1324 tw_dev->reset_print = 0;
1325
1326 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1327
1328 if (tw_reset_sequence(tw_dev)) {
1329 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset sequence failed.\n", tw_dev->host->host_no);
1330 return 1;
1331 }
1332
1333 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
1334 clear_bit(TW_IN_RESET, &tw_dev->flags);
1335 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1336
1337 return 0;
1338 } /* End tw_reset_device_extension() */
1339
1340 /* This funciton returns unit geometry in cylinders/heads/sectors */
1341 static int tw_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev,
1342 sector_t capacity, int geom[])
1343 {
1344 int heads, sectors, cylinders;
1345 TW_Device_Extension *tw_dev;
1346
1347 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam()\n");
1348 tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
1349
1350 heads = 64;
1351 sectors = 32;
1352 cylinders = sector_div(capacity, heads * sectors);
1353
1354 if (capacity >= 0x200000) {
1355 heads = 255;
1356 sectors = 63;
1357 cylinders = sector_div(capacity, heads * sectors);
1358 }
1359
1360 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam(): heads = %d, sectors = %d, cylinders = %d\n", heads, sectors, cylinders);
1361 geom[0] = heads;
1362 geom[1] = sectors;
1363 geom[2] = cylinders;
1364
1365 return 0;
1366 } /* End tw_scsi_biosparam() */
1367
1368 /* This is the new scsi eh reset function */
1369 static int tw_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1370 {
1371 TW_Device_Extension *tw_dev=NULL;
1372 int retval = FAILED;
1373
1374 tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1375
1376 tw_dev->num_resets++;
1377
1378 sdev_printk(KERN_WARNING, SCpnt->device,
1379 "WARNING: Command (0x%x) timed out, resetting card.\n",
1380 SCpnt->cmnd[0]);
1381
1382 /* Make sure we are not issuing an ioctl or resetting from ioctl */
1383 mutex_lock(&tw_dev->ioctl_lock);
1384
1385 /* Now reset the card and some of the device extension data */
1386 if (tw_reset_device_extension(tw_dev)) {
1387 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset failed.\n", tw_dev->host->host_no);
1388 goto out;
1389 }
1390
1391 retval = SUCCESS;
1392 out:
1393 mutex_unlock(&tw_dev->ioctl_lock);
1394 return retval;
1395 } /* End tw_scsi_eh_reset() */
1396
1397 /* This function handles scsi inquiry commands */
1398 static int tw_scsiop_inquiry(TW_Device_Extension *tw_dev, int request_id)
1399 {
1400 TW_Param *param;
1401 TW_Command *command_packet;
1402 unsigned long command_que_value;
1403 unsigned long param_value;
1404
1405 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry()\n");
1406
1407 /* Initialize command packet */
1408 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1409 if (command_packet == NULL) {
1410 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet virtual address.\n");
1411 return 1;
1412 }
1413 memset(command_packet, 0, sizeof(TW_Sector));
1414 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1415 command_packet->size = 4;
1416 command_packet->request_id = request_id;
1417 command_packet->status = 0;
1418 command_packet->flags = 0;
1419 command_packet->byte6.parameter_count = 1;
1420
1421 /* Now setup the param */
1422 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1423 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment virtual address.\n");
1424 return 1;
1425 }
1426 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1427 memset(param, 0, sizeof(TW_Sector));
1428 param->table_id = 3; /* unit summary table */
1429 param->parameter_id = 3; /* unitsstatus parameter */
1430 param->parameter_size_bytes = TW_MAX_UNITS;
1431 param_value = tw_dev->alignment_physical_address[request_id];
1432 if (param_value == 0) {
1433 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment physical address.\n");
1434 return 1;
1435 }
1436
1437 command_packet->byte8.param.sgl[0].address = param_value;
1438 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1439 command_que_value = tw_dev->command_packet_physical_address[request_id];
1440 if (command_que_value == 0) {
1441 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet physical address.\n");
1442 return 1;
1443 }
1444
1445 /* Now try to post the command packet */
1446 tw_post_command_packet(tw_dev, request_id);
1447
1448 return 0;
1449 } /* End tw_scsiop_inquiry() */
1450
1451 static void tw_transfer_internal(TW_Device_Extension *tw_dev, int request_id,
1452 void *data, unsigned int len)
1453 {
1454 scsi_sg_copy_from_buffer(tw_dev->srb[request_id], data, len);
1455 }
1456
1457 /* This function is called by the isr to complete an inquiry command */
1458 static int tw_scsiop_inquiry_complete(TW_Device_Extension *tw_dev, int request_id)
1459 {
1460 unsigned char *is_unit_present;
1461 unsigned char request_buffer[36];
1462 TW_Param *param;
1463
1464 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry_complete()\n");
1465
1466 memset(request_buffer, 0, sizeof(request_buffer));
1467 request_buffer[0] = TYPE_DISK; /* Peripheral device type */
1468 request_buffer[1] = 0; /* Device type modifier */
1469 request_buffer[2] = 0; /* No ansi/iso compliance */
1470 request_buffer[4] = 31; /* Additional length */
1471 memcpy(&request_buffer[8], "3ware ", 8); /* Vendor ID */
1472 sprintf(&request_buffer[16], "Logical Disk %-2d ", tw_dev->srb[request_id]->device->id);
1473 memcpy(&request_buffer[32], TW_DRIVER_VERSION, 3);
1474 tw_transfer_internal(tw_dev, request_id, request_buffer,
1475 sizeof(request_buffer));
1476
1477 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1478 if (param == NULL) {
1479 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry_complete(): Bad alignment virtual address.\n");
1480 return 1;
1481 }
1482 is_unit_present = &(param->data[0]);
1483
1484 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1485 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1486 } else {
1487 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1488 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1489 return TW_ISR_DONT_RESULT;
1490 }
1491
1492 return 0;
1493 } /* End tw_scsiop_inquiry_complete() */
1494
1495 /* This function handles scsi mode_sense commands */
1496 static int tw_scsiop_mode_sense(TW_Device_Extension *tw_dev, int request_id)
1497 {
1498 TW_Param *param;
1499 TW_Command *command_packet;
1500 unsigned long command_que_value;
1501 unsigned long param_value;
1502
1503 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense()\n");
1504
1505 /* Only page control = 0, page code = 0x8 (cache page) supported */
1506 if (tw_dev->srb[request_id]->cmnd[2] != 0x8) {
1507 tw_dev->state[request_id] = TW_S_COMPLETED;
1508 tw_state_request_finish(tw_dev, request_id);
1509 tw_dev->srb[request_id]->result = (DID_OK << 16);
1510 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1511 return 0;
1512 }
1513
1514 /* Now read firmware cache setting for this unit */
1515 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1516 if (command_packet == NULL) {
1517 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet virtual address.\n");
1518 return 1;
1519 }
1520
1521 /* Setup the command packet */
1522 memset(command_packet, 0, sizeof(TW_Sector));
1523 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1524 command_packet->size = 4;
1525 command_packet->request_id = request_id;
1526 command_packet->status = 0;
1527 command_packet->flags = 0;
1528 command_packet->byte6.parameter_count = 1;
1529
1530 /* Setup the param */
1531 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1532 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment virtual address.\n");
1533 return 1;
1534 }
1535
1536 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1537 memset(param, 0, sizeof(TW_Sector));
1538 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE + tw_dev->srb[request_id]->device->id;
1539 param->parameter_id = 7; /* unit flags */
1540 param->parameter_size_bytes = 1;
1541 param_value = tw_dev->alignment_physical_address[request_id];
1542 if (param_value == 0) {
1543 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment physical address.\n");
1544 return 1;
1545 }
1546
1547 command_packet->byte8.param.sgl[0].address = param_value;
1548 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1549 command_que_value = tw_dev->command_packet_physical_address[request_id];
1550 if (command_que_value == 0) {
1551 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet physical address.\n");
1552 return 1;
1553 }
1554
1555 /* Now try to post the command packet */
1556 tw_post_command_packet(tw_dev, request_id);
1557
1558 return 0;
1559 } /* End tw_scsiop_mode_sense() */
1560
1561 /* This function is called by the isr to complete a mode sense command */
1562 static int tw_scsiop_mode_sense_complete(TW_Device_Extension *tw_dev, int request_id)
1563 {
1564 TW_Param *param;
1565 unsigned char *flags;
1566 unsigned char request_buffer[8];
1567
1568 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense_complete()\n");
1569
1570 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1571 if (param == NULL) {
1572 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense_complete(): Bad alignment virtual address.\n");
1573 return 1;
1574 }
1575 flags = (char *)&(param->data[0]);
1576 memset(request_buffer, 0, sizeof(request_buffer));
1577
1578 request_buffer[0] = 0xf; /* mode data length */
1579 request_buffer[1] = 0; /* default medium type */
1580 request_buffer[2] = 0x10; /* dpo/fua support on */
1581 request_buffer[3] = 0; /* no block descriptors */
1582 request_buffer[4] = 0x8; /* caching page */
1583 request_buffer[5] = 0xa; /* page length */
1584 if (*flags & 0x1)
1585 request_buffer[6] = 0x5; /* WCE on, RCD on */
1586 else
1587 request_buffer[6] = 0x1; /* WCE off, RCD on */
1588 tw_transfer_internal(tw_dev, request_id, request_buffer,
1589 sizeof(request_buffer));
1590
1591 return 0;
1592 } /* End tw_scsiop_mode_sense_complete() */
1593
1594 /* This function handles scsi read_capacity commands */
1595 static int tw_scsiop_read_capacity(TW_Device_Extension *tw_dev, int request_id)
1596 {
1597 TW_Param *param;
1598 TW_Command *command_packet;
1599 unsigned long command_que_value;
1600 unsigned long param_value;
1601
1602 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity()\n");
1603
1604 /* Initialize command packet */
1605 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1606
1607 if (command_packet == NULL) {
1608 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet virtual address.\n");
1609 return 1;
1610 }
1611 memset(command_packet, 0, sizeof(TW_Sector));
1612 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1613 command_packet->size = 4;
1614 command_packet->request_id = request_id;
1615 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1616 command_packet->status = 0;
1617 command_packet->flags = 0;
1618 command_packet->byte6.block_count = 1;
1619
1620 /* Now setup the param */
1621 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1622 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment virtual address.\n");
1623 return 1;
1624 }
1625 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1626 memset(param, 0, sizeof(TW_Sector));
1627 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE +
1628 tw_dev->srb[request_id]->device->id;
1629 param->parameter_id = 4; /* unitcapacity parameter */
1630 param->parameter_size_bytes = 4;
1631 param_value = tw_dev->alignment_physical_address[request_id];
1632 if (param_value == 0) {
1633 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment physical address.\n");
1634 return 1;
1635 }
1636
1637 command_packet->byte8.param.sgl[0].address = param_value;
1638 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1639 command_que_value = tw_dev->command_packet_physical_address[request_id];
1640 if (command_que_value == 0) {
1641 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet physical address.\n");
1642 return 1;
1643 }
1644
1645 /* Now try to post the command to the board */
1646 tw_post_command_packet(tw_dev, request_id);
1647
1648 return 0;
1649 } /* End tw_scsiop_read_capacity() */
1650
1651 /* This function is called by the isr to complete a readcapacity command */
1652 static int tw_scsiop_read_capacity_complete(TW_Device_Extension *tw_dev, int request_id)
1653 {
1654 unsigned char *param_data;
1655 u32 capacity;
1656 char buff[8];
1657 TW_Param *param;
1658
1659 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete()\n");
1660
1661 memset(buff, 0, sizeof(buff));
1662 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1663 if (param == NULL) {
1664 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_capacity_complete(): Bad alignment virtual address.\n");
1665 return 1;
1666 }
1667 param_data = &(param->data[0]);
1668
1669 capacity = (param_data[3] << 24) | (param_data[2] << 16) |
1670 (param_data[1] << 8) | param_data[0];
1671
1672 /* Subtract one sector to fix get last sector ioctl */
1673 capacity -= 1;
1674
1675 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete(): Capacity = 0x%x.\n", capacity);
1676
1677 /* Number of LBA's */
1678 buff[0] = (capacity >> 24);
1679 buff[1] = (capacity >> 16) & 0xff;
1680 buff[2] = (capacity >> 8) & 0xff;
1681 buff[3] = capacity & 0xff;
1682
1683 /* Block size in bytes (512) */
1684 buff[4] = (TW_BLOCK_SIZE >> 24);
1685 buff[5] = (TW_BLOCK_SIZE >> 16) & 0xff;
1686 buff[6] = (TW_BLOCK_SIZE >> 8) & 0xff;
1687 buff[7] = TW_BLOCK_SIZE & 0xff;
1688
1689 tw_transfer_internal(tw_dev, request_id, buff, sizeof(buff));
1690
1691 return 0;
1692 } /* End tw_scsiop_read_capacity_complete() */
1693
1694 /* This function handles scsi read or write commands */
1695 static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id)
1696 {
1697 TW_Command *command_packet;
1698 unsigned long command_que_value;
1699 u32 lba = 0x0, num_sectors = 0x0;
1700 int i, use_sg;
1701 struct scsi_cmnd *srb;
1702 struct scatterlist *sglist, *sg;
1703
1704 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write()\n");
1705
1706 srb = tw_dev->srb[request_id];
1707
1708 sglist = scsi_sglist(srb);
1709 if (!sglist) {
1710 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Request buffer NULL.\n");
1711 return 1;
1712 }
1713
1714 /* Initialize command packet */
1715 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1716 if (command_packet == NULL) {
1717 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): Bad command packet virtual address.\n");
1718 return 1;
1719 }
1720
1721 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == READ_10) {
1722 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_READ);
1723 } else {
1724 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_WRITE);
1725 }
1726
1727 command_packet->size = 3;
1728 command_packet->request_id = request_id;
1729 command_packet->unit__hostid = TW_UNITHOST_IN(0, srb->device->id);
1730 command_packet->status = 0;
1731 command_packet->flags = 0;
1732
1733 if (srb->cmnd[0] == WRITE_10) {
1734 if ((srb->cmnd[1] & 0x8) || (srb->cmnd[1] & 0x10))
1735 command_packet->flags = 1;
1736 }
1737
1738 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6) {
1739 lba = ((u32)srb->cmnd[1] << 16) | ((u32)srb->cmnd[2] << 8) | (u32)srb->cmnd[3];
1740 num_sectors = (u32)srb->cmnd[4];
1741 } else {
1742 lba = ((u32)srb->cmnd[2] << 24) | ((u32)srb->cmnd[3] << 16) | ((u32)srb->cmnd[4] << 8) | (u32)srb->cmnd[5];
1743 num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
1744 }
1745
1746 /* Update sector statistic */
1747 tw_dev->sector_count = num_sectors;
1748 if (tw_dev->sector_count > tw_dev->max_sector_count)
1749 tw_dev->max_sector_count = tw_dev->sector_count;
1750
1751 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): lba = 0x%x num_sectors = 0x%x\n", lba, num_sectors);
1752 command_packet->byte8.io.lba = lba;
1753 command_packet->byte6.block_count = num_sectors;
1754
1755 use_sg = scsi_dma_map(srb);
1756 if (use_sg <= 0)
1757 return 1;
1758
1759 scsi_for_each_sg(tw_dev->srb[request_id], sg, use_sg, i) {
1760 command_packet->byte8.io.sgl[i].address = sg_dma_address(sg);
1761 command_packet->byte8.io.sgl[i].length = sg_dma_len(sg);
1762 command_packet->size+=2;
1763 }
1764
1765 /* Update SG statistics */
1766 tw_dev->sgl_entries = scsi_sg_count(tw_dev->srb[request_id]);
1767 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
1768 tw_dev->max_sgl_entries = tw_dev->sgl_entries;
1769
1770 command_que_value = tw_dev->command_packet_physical_address[request_id];
1771 if (command_que_value == 0) {
1772 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Bad command packet physical address.\n");
1773 return 1;
1774 }
1775
1776 /* Now try to post the command to the board */
1777 tw_post_command_packet(tw_dev, request_id);
1778
1779 return 0;
1780 } /* End tw_scsiop_read_write() */
1781
1782 /* This function will handle the request sense scsi command */
1783 static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id)
1784 {
1785 char request_buffer[18];
1786
1787 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n");
1788
1789 memset(request_buffer, 0, sizeof(request_buffer));
1790 request_buffer[0] = 0x70; /* Immediate fixed format */
1791 request_buffer[7] = 10; /* minimum size per SPC: 18 bytes */
1792 /* leave all other fields zero, giving effectively NO_SENSE return */
1793 tw_transfer_internal(tw_dev, request_id, request_buffer,
1794 sizeof(request_buffer));
1795
1796 tw_dev->state[request_id] = TW_S_COMPLETED;
1797 tw_state_request_finish(tw_dev, request_id);
1798
1799 /* If we got a request_sense, we probably want a reset, return error */
1800 tw_dev->srb[request_id]->result = (DID_ERROR << 16);
1801 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1802
1803 return 0;
1804 } /* End tw_scsiop_request_sense() */
1805
1806 /* This function will handle synchronize cache scsi command */
1807 static int tw_scsiop_synchronize_cache(TW_Device_Extension *tw_dev, int request_id)
1808 {
1809 TW_Command *command_packet;
1810 unsigned long command_que_value;
1811
1812 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_synchronize_cache()\n");
1813
1814 /* Send firmware flush command for this unit */
1815 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1816 if (command_packet == NULL) {
1817 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet virtual address.\n");
1818 return 1;
1819 }
1820
1821 /* Setup the command packet */
1822 memset(command_packet, 0, sizeof(TW_Sector));
1823 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_FLUSH_CACHE);
1824 command_packet->size = 2;
1825 command_packet->request_id = request_id;
1826 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1827 command_packet->status = 0;
1828 command_packet->flags = 0;
1829 command_packet->byte6.parameter_count = 1;
1830 command_que_value = tw_dev->command_packet_physical_address[request_id];
1831 if (command_que_value == 0) {
1832 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet physical address.\n");
1833 return 1;
1834 }
1835
1836 /* Now try to post the command packet */
1837 tw_post_command_packet(tw_dev, request_id);
1838
1839 return 0;
1840 } /* End tw_scsiop_synchronize_cache() */
1841
1842 /* This function will handle test unit ready scsi command */
1843 static int tw_scsiop_test_unit_ready(TW_Device_Extension *tw_dev, int request_id)
1844 {
1845 TW_Param *param;
1846 TW_Command *command_packet;
1847 unsigned long command_que_value;
1848 unsigned long param_value;
1849
1850 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_test_unit_ready()\n");
1851
1852 /* Initialize command packet */
1853 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1854 if (command_packet == NULL) {
1855 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet virtual address.\n");
1856 return 1;
1857 }
1858 memset(command_packet, 0, sizeof(TW_Sector));
1859 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1860 command_packet->size = 4;
1861 command_packet->request_id = request_id;
1862 command_packet->status = 0;
1863 command_packet->flags = 0;
1864 command_packet->byte6.parameter_count = 1;
1865
1866 /* Now setup the param */
1867 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1868 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment virtual address.\n");
1869 return 1;
1870 }
1871 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1872 memset(param, 0, sizeof(TW_Sector));
1873 param->table_id = 3; /* unit summary table */
1874 param->parameter_id = 3; /* unitsstatus parameter */
1875 param->parameter_size_bytes = TW_MAX_UNITS;
1876 param_value = tw_dev->alignment_physical_address[request_id];
1877 if (param_value == 0) {
1878 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment physical address.\n");
1879 return 1;
1880 }
1881
1882 command_packet->byte8.param.sgl[0].address = param_value;
1883 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1884 command_que_value = tw_dev->command_packet_physical_address[request_id];
1885 if (command_que_value == 0) {
1886 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet physical address.\n");
1887 return 1;
1888 }
1889
1890 /* Now try to post the command packet */
1891 tw_post_command_packet(tw_dev, request_id);
1892
1893 return 0;
1894 } /* End tw_scsiop_test_unit_ready() */
1895
1896 /* This function is called by the isr to complete a testunitready command */
1897 static int tw_scsiop_test_unit_ready_complete(TW_Device_Extension *tw_dev, int request_id)
1898 {
1899 unsigned char *is_unit_present;
1900 TW_Param *param;
1901
1902 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete()\n");
1903
1904 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1905 if (param == NULL) {
1906 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete(): Bad alignment virtual address.\n");
1907 return 1;
1908 }
1909 is_unit_present = &(param->data[0]);
1910
1911 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1912 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1913 } else {
1914 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1915 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1916 return TW_ISR_DONT_RESULT;
1917 }
1918
1919 return 0;
1920 } /* End tw_scsiop_test_unit_ready_complete() */
1921
1922 /* This is the main scsi queue function to handle scsi opcodes */
1923 static int tw_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
1924 {
1925 unsigned char *command = SCpnt->cmnd;
1926 int request_id = 0;
1927 int retval = 1;
1928 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1929
1930 /* If we are resetting due to timed out ioctl, report as busy */
1931 if (test_bit(TW_IN_RESET, &tw_dev->flags))
1932 return SCSI_MLQUEUE_HOST_BUSY;
1933
1934 /* Save done function into struct scsi_cmnd */
1935 SCpnt->scsi_done = done;
1936
1937 /* Queue the command and get a request id */
1938 tw_state_request_start(tw_dev, &request_id);
1939
1940 /* Save the scsi command for use by the ISR */
1941 tw_dev->srb[request_id] = SCpnt;
1942
1943 switch (*command) {
1944 case READ_10:
1945 case READ_6:
1946 case WRITE_10:
1947 case WRITE_6:
1948 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ/WRITE.\n");
1949 retval = tw_scsiop_read_write(tw_dev, request_id);
1950 break;
1951 case TEST_UNIT_READY:
1952 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught TEST_UNIT_READY.\n");
1953 retval = tw_scsiop_test_unit_ready(tw_dev, request_id);
1954 break;
1955 case INQUIRY:
1956 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught INQUIRY.\n");
1957 retval = tw_scsiop_inquiry(tw_dev, request_id);
1958 break;
1959 case READ_CAPACITY:
1960 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ_CAPACITY.\n");
1961 retval = tw_scsiop_read_capacity(tw_dev, request_id);
1962 break;
1963 case REQUEST_SENSE:
1964 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught REQUEST_SENSE.\n");
1965 retval = tw_scsiop_request_sense(tw_dev, request_id);
1966 break;
1967 case MODE_SENSE:
1968 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught MODE_SENSE.\n");
1969 retval = tw_scsiop_mode_sense(tw_dev, request_id);
1970 break;
1971 case SYNCHRONIZE_CACHE:
1972 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught SYNCHRONIZE_CACHE.\n");
1973 retval = tw_scsiop_synchronize_cache(tw_dev, request_id);
1974 break;
1975 case TW_IOCTL:
1976 printk(KERN_WARNING "3w-xxxx: SCSI_IOCTL_SEND_COMMAND deprecated, please update your 3ware tools.\n");
1977 break;
1978 default:
1979 printk(KERN_NOTICE "3w-xxxx: scsi%d: Unknown scsi opcode: 0x%x\n", tw_dev->host->host_no, *command);
1980 tw_dev->state[request_id] = TW_S_COMPLETED;
1981 tw_state_request_finish(tw_dev, request_id);
1982 SCpnt->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1983 scsi_build_sense_buffer(1, SCpnt->sense_buffer, ILLEGAL_REQUEST, 0x20, 0);
1984 done(SCpnt);
1985 retval = 0;
1986 }
1987 if (retval) {
1988 tw_dev->state[request_id] = TW_S_COMPLETED;
1989 tw_state_request_finish(tw_dev, request_id);
1990 SCpnt->result = (DID_ERROR << 16);
1991 done(SCpnt);
1992 retval = 0;
1993 }
1994 return retval;
1995 } /* End tw_scsi_queue() */
1996
1997 static DEF_SCSI_QCMD(tw_scsi_queue)
1998
1999 /* This function is the interrupt service routine */
2000 static irqreturn_t tw_interrupt(int irq, void *dev_instance)
2001 {
2002 int request_id;
2003 u32 status_reg_value;
2004 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
2005 TW_Response_Queue response_que;
2006 int error = 0, retval = 0;
2007 TW_Command *command_packet;
2008 int handled = 0;
2009
2010 /* Get the host lock for io completions */
2011 spin_lock(tw_dev->host->host_lock);
2012
2013 /* Read the registers */
2014 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2015
2016 /* Check if this is our interrupt, otherwise bail */
2017 if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
2018 goto tw_interrupt_bail;
2019
2020 handled = 1;
2021
2022 /* If we are resetting, bail */
2023 if (test_bit(TW_IN_RESET, &tw_dev->flags))
2024 goto tw_interrupt_bail;
2025
2026 /* Check controller for errors */
2027 if (tw_check_bits(status_reg_value)) {
2028 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2029 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2030 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2031 goto tw_interrupt_bail;
2032 }
2033 }
2034
2035 /* Handle host interrupt */
2036 if (status_reg_value & TW_STATUS_HOST_INTERRUPT) {
2037 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received host interrupt.\n");
2038 TW_CLEAR_HOST_INTERRUPT(tw_dev);
2039 }
2040
2041 /* Handle attention interrupt */
2042 if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
2043 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received attention interrupt.\n");
2044 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
2045 tw_state_request_start(tw_dev, &request_id);
2046 error = tw_aen_read_queue(tw_dev, request_id);
2047 if (error) {
2048 printk(KERN_WARNING "3w-xxxx: scsi%d: Error reading aen queue.\n", tw_dev->host->host_no);
2049 tw_dev->state[request_id] = TW_S_COMPLETED;
2050 tw_state_request_finish(tw_dev, request_id);
2051 }
2052 }
2053
2054 /* Handle command interrupt */
2055 if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
2056 /* Drain as many pending commands as we can */
2057 while (tw_dev->pending_request_count > 0) {
2058 request_id = tw_dev->pending_queue[tw_dev->pending_head];
2059 if (tw_dev->state[request_id] != TW_S_PENDING) {
2060 printk(KERN_WARNING "3w-xxxx: scsi%d: Found request id that wasn't pending.\n", tw_dev->host->host_no);
2061 break;
2062 }
2063 if (tw_post_command_packet(tw_dev, request_id)==0) {
2064 if (tw_dev->pending_head == TW_Q_LENGTH-1) {
2065 tw_dev->pending_head = TW_Q_START;
2066 } else {
2067 tw_dev->pending_head = tw_dev->pending_head + 1;
2068 }
2069 tw_dev->pending_request_count--;
2070 } else {
2071 /* If we get here, we will continue re-posting on the next command interrupt */
2072 break;
2073 }
2074 }
2075 /* If there are no more pending requests, we mask command interrupt */
2076 if (tw_dev->pending_request_count == 0)
2077 TW_MASK_COMMAND_INTERRUPT(tw_dev);
2078 }
2079
2080 /* Handle response interrupt */
2081 if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
2082 /* Drain the response queue from the board */
2083 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
2084 /* Read response queue register */
2085 response_que.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
2086 request_id = TW_RESID_OUT(response_que.response_id);
2087 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
2088 error = 0;
2089
2090 /* Check for bad response */
2091 if (command_packet->status != 0) {
2092 /* If internal command, don't error, don't fill sense */
2093 if (tw_dev->srb[request_id] == NULL) {
2094 tw_decode_sense(tw_dev, request_id, 0);
2095 } else {
2096 error = tw_decode_sense(tw_dev, request_id, 1);
2097 }
2098 }
2099
2100 /* Check for correct state */
2101 if (tw_dev->state[request_id] != TW_S_POSTED) {
2102 if (tw_dev->srb[request_id] != NULL) {
2103 printk(KERN_WARNING "3w-xxxx: scsi%d: Received a request id that wasn't posted.\n", tw_dev->host->host_no);
2104 error = 1;
2105 }
2106 }
2107
2108 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Response queue request id: %d.\n", request_id);
2109
2110 /* Check for internal command completion */
2111 if (tw_dev->srb[request_id] == NULL) {
2112 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Found internally posted command.\n");
2113 /* Check for chrdev ioctl completion */
2114 if (request_id != tw_dev->chrdev_request_id) {
2115 retval = tw_aen_complete(tw_dev, request_id);
2116 if (retval) {
2117 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing aen.\n", tw_dev->host->host_no);
2118 }
2119 } else {
2120 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
2121 wake_up(&tw_dev->ioctl_wqueue);
2122 }
2123 } else {
2124 switch (tw_dev->srb[request_id]->cmnd[0]) {
2125 case READ_10:
2126 case READ_6:
2127 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_10/READ_6\n");
2128 break;
2129 case WRITE_10:
2130 case WRITE_6:
2131 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught WRITE_10/WRITE_6\n");
2132 break;
2133 case TEST_UNIT_READY:
2134 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught TEST_UNIT_READY\n");
2135 error = tw_scsiop_test_unit_ready_complete(tw_dev, request_id);
2136 break;
2137 case INQUIRY:
2138 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught INQUIRY\n");
2139 error = tw_scsiop_inquiry_complete(tw_dev, request_id);
2140 break;
2141 case READ_CAPACITY:
2142 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_CAPACITY\n");
2143 error = tw_scsiop_read_capacity_complete(tw_dev, request_id);
2144 break;
2145 case MODE_SENSE:
2146 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught MODE_SENSE\n");
2147 error = tw_scsiop_mode_sense_complete(tw_dev, request_id);
2148 break;
2149 case SYNCHRONIZE_CACHE:
2150 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught SYNCHRONIZE_CACHE\n");
2151 break;
2152 default:
2153 printk(KERN_WARNING "3w-xxxx: case slip in tw_interrupt()\n");
2154 error = 1;
2155 }
2156
2157 /* If no error command was a success */
2158 if (error == 0) {
2159 tw_dev->srb[request_id]->result = (DID_OK << 16);
2160 }
2161
2162 /* If error, command failed */
2163 if (error == 1) {
2164 /* Ask for a host reset */
2165 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
2166 }
2167
2168 /* Now complete the io */
2169 if ((error != TW_ISR_DONT_COMPLETE)) {
2170 scsi_dma_unmap(tw_dev->srb[request_id]);
2171 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
2172 tw_dev->state[request_id] = TW_S_COMPLETED;
2173 tw_state_request_finish(tw_dev, request_id);
2174 tw_dev->posted_request_count--;
2175 }
2176 }
2177
2178 /* Check for valid status after each drain */
2179 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2180 if (tw_check_bits(status_reg_value)) {
2181 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2182 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2183 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2184 goto tw_interrupt_bail;
2185 }
2186 }
2187 }
2188 }
2189
2190 tw_interrupt_bail:
2191 spin_unlock(tw_dev->host->host_lock);
2192 return IRQ_RETVAL(handled);
2193 } /* End tw_interrupt() */
2194
2195 /* This function tells the controller to shut down */
2196 static void __tw_shutdown(TW_Device_Extension *tw_dev)
2197 {
2198 /* Disable interrupts */
2199 TW_DISABLE_INTERRUPTS(tw_dev);
2200
2201 /* Free up the IRQ */
2202 free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
2203
2204 printk(KERN_WARNING "3w-xxxx: Shutting down host %d.\n", tw_dev->host->host_no);
2205
2206 /* Tell the card we are shutting down */
2207 if (tw_initconnection(tw_dev, 1)) {
2208 printk(KERN_WARNING "3w-xxxx: Connection shutdown failed.\n");
2209 } else {
2210 printk(KERN_WARNING "3w-xxxx: Shutdown complete.\n");
2211 }
2212
2213 /* Clear all interrupts just before exit */
2214 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2215 } /* End __tw_shutdown() */
2216
2217 /* Wrapper for __tw_shutdown */
2218 static void tw_shutdown(struct pci_dev *pdev)
2219 {
2220 struct Scsi_Host *host = pci_get_drvdata(pdev);
2221 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2222
2223 __tw_shutdown(tw_dev);
2224 } /* End tw_shutdown() */
2225
2226 /* This function gets called when a disk is coming online */
2227 static int tw_slave_configure(struct scsi_device *sdev)
2228 {
2229 /* Force 60 second timeout */
2230 blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
2231
2232 return 0;
2233 } /* End tw_slave_configure() */
2234
2235 static struct scsi_host_template driver_template = {
2236 .module = THIS_MODULE,
2237 .name = "3ware Storage Controller",
2238 .queuecommand = tw_scsi_queue,
2239 .eh_host_reset_handler = tw_scsi_eh_reset,
2240 .bios_param = tw_scsi_biosparam,
2241 .change_queue_depth = scsi_change_queue_depth,
2242 .can_queue = TW_Q_LENGTH-2,
2243 .slave_configure = tw_slave_configure,
2244 .this_id = -1,
2245 .sg_tablesize = TW_MAX_SGL_LENGTH,
2246 .max_sectors = TW_MAX_SECTORS,
2247 .cmd_per_lun = TW_MAX_CMDS_PER_LUN,
2248 .shost_attrs = tw_host_attrs,
2249 .emulated = 1,
2250 .no_write_same = 1,
2251 };
2252
2253 /* This function will probe and initialize a card */
2254 static int tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
2255 {
2256 struct Scsi_Host *host = NULL;
2257 TW_Device_Extension *tw_dev;
2258 int retval = -ENODEV;
2259
2260 retval = pci_enable_device(pdev);
2261 if (retval) {
2262 printk(KERN_WARNING "3w-xxxx: Failed to enable pci device.");
2263 goto out_disable_device;
2264 }
2265
2266 pci_set_master(pdev);
2267
2268 retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2269 if (retval) {
2270 printk(KERN_WARNING "3w-xxxx: Failed to set dma mask.");
2271 goto out_disable_device;
2272 }
2273
2274 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2275 if (!host) {
2276 printk(KERN_WARNING "3w-xxxx: Failed to allocate memory for device extension.");
2277 retval = -ENOMEM;
2278 goto out_disable_device;
2279 }
2280 tw_dev = (TW_Device_Extension *)host->hostdata;
2281
2282 /* Save values to device extension */
2283 tw_dev->host = host;
2284 tw_dev->tw_pci_dev = pdev;
2285
2286 if (tw_initialize_device_extension(tw_dev)) {
2287 printk(KERN_WARNING "3w-xxxx: Failed to initialize device extension.");
2288 retval = -ENOMEM;
2289 goto out_free_device_extension;
2290 }
2291
2292 /* Request IO regions */
2293 retval = pci_request_regions(pdev, "3w-xxxx");
2294 if (retval) {
2295 printk(KERN_WARNING "3w-xxxx: Failed to get mem region.");
2296 goto out_free_device_extension;
2297 }
2298
2299 /* Save base address */
2300 tw_dev->base_addr = pci_resource_start(pdev, 0);
2301 if (!tw_dev->base_addr) {
2302 printk(KERN_WARNING "3w-xxxx: Failed to get io address.");
2303 retval = -ENOMEM;
2304 goto out_release_mem_region;
2305 }
2306
2307 /* Disable interrupts on the card */
2308 TW_DISABLE_INTERRUPTS(tw_dev);
2309
2310 /* Initialize the card */
2311 if (tw_reset_sequence(tw_dev))
2312 goto out_release_mem_region;
2313
2314 /* Set host specific parameters */
2315 host->max_id = TW_MAX_UNITS;
2316 host->max_cmd_len = TW_MAX_CDB_LEN;
2317
2318 /* Luns and channels aren't supported by adapter */
2319 host->max_lun = 0;
2320 host->max_channel = 0;
2321
2322 /* Register the card with the kernel SCSI layer */
2323 retval = scsi_add_host(host, &pdev->dev);
2324 if (retval) {
2325 printk(KERN_WARNING "3w-xxxx: scsi add host failed");
2326 goto out_release_mem_region;
2327 }
2328
2329 pci_set_drvdata(pdev, host);
2330
2331 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);
2332
2333 /* Now setup the interrupt handler */
2334 retval = request_irq(pdev->irq, tw_interrupt, IRQF_SHARED, "3w-xxxx", tw_dev);
2335 if (retval) {
2336 printk(KERN_WARNING "3w-xxxx: Error requesting IRQ.");
2337 goto out_remove_host;
2338 }
2339
2340 tw_device_extension_list[tw_device_extension_count] = tw_dev;
2341 tw_device_extension_count++;
2342
2343 /* Re-enable interrupts on the card */
2344 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2345
2346 /* Finally, scan the host */
2347 scsi_scan_host(host);
2348
2349 if (twe_major == -1) {
2350 if ((twe_major = register_chrdev (0, "twe", &tw_fops)) < 0)
2351 printk(KERN_WARNING "3w-xxxx: Failed to register character device.");
2352 }
2353 return 0;
2354
2355 out_remove_host:
2356 scsi_remove_host(host);
2357 out_release_mem_region:
2358 pci_release_regions(pdev);
2359 out_free_device_extension:
2360 tw_free_device_extension(tw_dev);
2361 scsi_host_put(host);
2362 out_disable_device:
2363 pci_disable_device(pdev);
2364
2365 return retval;
2366 } /* End tw_probe() */
2367
2368 /* This function is called to remove a device */
2369 static void tw_remove(struct pci_dev *pdev)
2370 {
2371 struct Scsi_Host *host = pci_get_drvdata(pdev);
2372 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2373
2374 scsi_remove_host(tw_dev->host);
2375
2376 /* Unregister character device */
2377 if (twe_major >= 0) {
2378 unregister_chrdev(twe_major, "twe");
2379 twe_major = -1;
2380 }
2381
2382 /* Shutdown the card */
2383 __tw_shutdown(tw_dev);
2384
2385 /* Free up the mem region */
2386 pci_release_regions(pdev);
2387
2388 /* Free up device extension resources */
2389 tw_free_device_extension(tw_dev);
2390
2391 scsi_host_put(tw_dev->host);
2392 pci_disable_device(pdev);
2393 tw_device_extension_count--;
2394 } /* End tw_remove() */
2395
2396 /* PCI Devices supported by this driver */
2397 static struct pci_device_id tw_pci_tbl[] = {
2398 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_1000,
2399 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2400 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_7000,
2401 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2402 { }
2403 };
2404 MODULE_DEVICE_TABLE(pci, tw_pci_tbl);
2405
2406 /* pci_driver initializer */
2407 static struct pci_driver tw_driver = {
2408 .name = "3w-xxxx",
2409 .id_table = tw_pci_tbl,
2410 .probe = tw_probe,
2411 .remove = tw_remove,
2412 .shutdown = tw_shutdown,
2413 };
2414
2415 /* This function is called on driver initialization */
2416 static int __init tw_init(void)
2417 {
2418 printk(KERN_WARNING "3ware Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2419
2420 return pci_register_driver(&tw_driver);
2421 } /* End tw_init() */
2422
2423 /* This function is called on driver exit */
2424 static void __exit tw_exit(void)
2425 {
2426 pci_unregister_driver(&tw_driver);
2427 } /* End tw_exit() */
2428
2429 module_init(tw_init);
2430 module_exit(tw_exit);
2431
Linux with added FPC-III support