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Linux-2.6.12-rc2
[linux-2.6/next.git] / drivers / scsi / 3w-xxxx.c
blob48f9ece1cbd0912237a3150c19410db31c6400a8
1 /*
2 3w-xxxx.c -- 3ware Storage Controller device driver for Linux.
3
4 Written By: Adam Radford <linuxraid@amcc.com>
5 Modifications By: Joel Jacobson <linux@3ware.com>
6 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
7 Brad Strand <linux@3ware.com>
8
9 Copyright (C) 1999-2005 3ware Inc.
10
11 Kernel compatiblity By: Andre Hedrick <andre@suse.com>
12 Non-Copyright (C) 2000 Andre Hedrick <andre@suse.com>
13
14 Further tiny build fixes and trivial hoovering Alan Cox
15
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; version 2 of the License.
19
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
24
25 NO WARRANTY
26 THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
27 CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
28 LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
29 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
30 solely responsible for determining the appropriateness of using and
31 distributing the Program and assumes all risks associated with its
32 exercise of rights under this Agreement, including but not limited to
33 the risks and costs of program errors, damage to or loss of data,
34 programs or equipment, and unavailability or interruption of operations.
35
36 DISCLAIMER OF LIABILITY
37 NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
38 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39 DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
40 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
41 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
42 USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
43 HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
44
45 You should have received a copy of the GNU General Public License
46 along with this program; if not, write to the Free Software
47 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
48
49 Bugs/Comments/Suggestions should be mailed to:
50 linuxraid@amcc.com
51
52 For more information, goto:
53 http://www.amcc.com
54
55 History
56 -------
57 0.1.000 - Initial release.
58 0.4.000 - Added support for Asynchronous Event Notification through
59 ioctls for 3DM.
60 1.0.000 - Added DPO & FUA bit support for WRITE_10 & WRITE_6 cdb
61 to disable drive write-cache before writes.
62 1.1.000 - Fixed performance bug with DPO & FUA not existing for WRITE_6.
63 1.2.000 - Added support for clean shutdown notification/feature table.
64 1.02.00.001 - Added support for full command packet posts through ioctls
65 for 3DM.
66 Bug fix so hot spare drives don't show up.
67 1.02.00.002 - Fix bug with tw_setfeature() call that caused oops on some
68 systems.
69 08/21/00 - release previously allocated resources on failure at
70 tw_allocate_memory (acme)
71 1.02.00.003 - Fix tw_interrupt() to report error to scsi layer when
72 controller status is non-zero.
73 Added handling of request_sense opcode.
74 Fix possible null pointer dereference in
75 tw_reset_device_extension()
76 1.02.00.004 - Add support for device id of 3ware 7000 series controllers.
77 Make tw_setfeature() call with interrupts disabled.
78 Register interrupt handler before enabling interrupts.
79 Clear attention interrupt before draining aen queue.
80 1.02.00.005 - Allocate bounce buffers and custom queue depth for raid5 for
81 6000 and 5000 series controllers.
82 Reduce polling mdelays causing problems on some systems.
83 Fix use_sg = 1 calculation bug.
84 Check for scsi_register returning NULL.
85 Add aen count to /proc/scsi/3w-xxxx.
86 Remove aen code unit masking in tw_aen_complete().
87 1.02.00.006 - Remove unit from printk in tw_scsi_eh_abort(), causing
88 possible oops.
89 Fix possible null pointer dereference in tw_scsi_queue()
90 if done function pointer was invalid.
91 1.02.00.007 - Fix possible null pointer dereferences in tw_ioctl().
92 Remove check for invalid done function pointer from
93 tw_scsi_queue().
94 1.02.00.008 - Set max sectors per io to TW_MAX_SECTORS in tw_findcards().
95 Add tw_decode_error() for printing readable error messages.
96 Print some useful information on certain aen codes.
97 Add tw_decode_bits() for interpreting status register output.
98 Make scsi_set_pci_device() for kernels >= 2.4.4
99 Fix bug where aen's could be lost before a reset.
100 Re-add spinlocks in tw_scsi_detect().
101 Fix possible null pointer dereference in tw_aen_drain_queue()
102 during initialization.
103 Clear pci parity errors during initialization and during io.
104 1.02.00.009 - Remove redundant increment in tw_state_request_start().
105 Add ioctl support for direct ATA command passthru.
106 Add entire aen code string list.
107 1.02.00.010 - Cleanup queueing code, fix jbod thoughput.
108 Fix get_param for specific units.
109 1.02.00.011 - Fix bug in tw_aen_complete() where aen's could be lost.
110 Fix tw_aen_drain_queue() to display useful info at init.
111 Set tw_host->max_id for 12 port cards.
112 Add ioctl support for raw command packet post from userspace
113 with sglist fragments (parameter and io).
114 1.02.00.012 - Fix read capacity to under report by 1 sector to fix get
115 last sector ioctl.
116 1.02.00.013 - Fix bug where more AEN codes weren't coming out during
117 driver initialization.
118 Improved handling of PCI aborts.
119 1.02.00.014 - Fix bug in tw_findcards() where AEN code could be lost.
120 Increase timeout in tw_aen_drain_queue() to 30 seconds.
121 1.02.00.015 - Re-write raw command post with data ioctl method.
122 Remove raid5 bounce buffers for raid5 for 6XXX for kernel 2.5
123 Add tw_map/unmap_scsi_sg/single_data() for kernel 2.5
124 Replace io_request_lock with host_lock for kernel 2.5
125 Set max_cmd_len to 16 for 3dm for kernel 2.5
126 1.02.00.016 - Set host->max_sectors back up to 256.
127 1.02.00.017 - Modified pci parity error handling/clearing from config space
128 during initialization.
129 1.02.00.018 - Better handling of request sense opcode and sense information
130 for failed commands. Add tw_decode_sense().
131 Replace all mdelay()'s with scsi_sleep().
132 1.02.00.019 - Revert mdelay's and scsi_sleep's, this caused problems on
133 some SMP systems.
134 1.02.00.020 - Add pci_set_dma_mask(), rewrite kmalloc()/virt_to_bus() to
135 pci_alloc/free_consistent().
136 Better alignment checking in tw_allocate_memory().
137 Cleanup tw_initialize_device_extension().
138 1.02.00.021 - Bump cmd_per_lun in SHT to 255 for better jbod performance.
139 Improve handling of errors in tw_interrupt().
140 Add handling/clearing of controller queue error.
141 Empty stale responses before draining aen queue.
142 Fix tw_scsi_eh_abort() to not reset on every io abort.
143 Set can_queue in SHT to 255 to prevent hang from AEN.
144 1.02.00.022 - Fix possible null pointer dereference in tw_scsi_release().
145 1.02.00.023 - Fix bug in tw_aen_drain_queue() where unit # was always zero.
146 1.02.00.024 - Add severity levels to AEN strings.
147 1.02.00.025 - Fix command interrupt spurious error messages.
148 Fix bug in raw command post with data ioctl method.
149 Fix bug where rollcall sometimes failed with cable errors.
150 Print unit # on all command timeouts.
151 1.02.00.026 - Fix possible infinite retry bug with power glitch induced
152 drive timeouts.
153 Cleanup some AEN severity levels.
154 1.02.00.027 - Add drive not supported AEN code for SATA controllers.
155 Remove spurious unknown ioctl error message.
156 1.02.00.028 - Fix bug where multiple controllers with no units were the
157 same card number.
158 Fix bug where cards were being shut down more than once.
159 1.02.00.029 - Add missing pci_free_consistent() in tw_allocate_memory().
160 Replace pci_map_single() with pci_map_page() for highmem.
161 Check for tw_setfeature() failure.
162 1.02.00.030 - Make driver 64-bit clean.
163 1.02.00.031 - Cleanup polling timeouts/routines in several places.
164 Add support for mode sense opcode.
165 Add support for cache mode page.
166 Add support for synchronize cache opcode.
167 1.02.00.032 - Fix small multicard rollcall bug.
168 Make driver stay loaded with no units for hot add/swap.
169 Add support for "twe" character device for ioctls.
170 Clean up request_id queueing code.
171 Fix tw_scsi_queue() spinlocks.
172 1.02.00.033 - Fix tw_aen_complete() to not queue 'queue empty' AEN's.
173 Initialize queues correctly when loading with no valid units.
174 1.02.00.034 - Fix tw_decode_bits() to handle multiple errors.
175 Add support for user configurable cmd_per_lun.
176 Add support for sht->slave_configure().
177 1.02.00.035 - Improve tw_allocate_memory() memory allocation.
178 Fix tw_chrdev_ioctl() to sleep correctly.
179 1.02.00.036 - Increase character ioctl timeout to 60 seconds.
180 1.02.00.037 - Fix tw_ioctl() to handle all non-data ATA passthru cmds
181 for 'smartmontools' support.
182 1.26.00.038 - Roll driver minor version to 26 to denote kernel 2.6.
183 Add support for cmds_per_lun module parameter.
184 1.26.00.039 - Fix bug in tw_chrdev_ioctl() polling code.
185 Fix data_buffer_length usage in tw_chrdev_ioctl().
186 Update contact information.
187 1.26.02.000 - Convert driver to pci_driver format.
188 1.26.02.001 - Increase max ioctl buffer size to 512 sectors.
189 Make tw_scsi_queue() return 0 for 'Unknown scsi opcode'.
190 Fix tw_remove() to free irq handler/unregister_chrdev()
191 before shutting down card.
192 Change to new 'change_queue_depth' api.
193 Fix 'handled=1' ISR usage, remove bogus IRQ check.
194 */
195
196 #include <linux/module.h>
197 #include <linux/reboot.h>
198 #include <linux/spinlock.h>
199 #include <linux/interrupt.h>
200 #include <linux/moduleparam.h>
201 #include <linux/errno.h>
202 #include <linux/types.h>
203 #include <linux/delay.h>
204 #include <linux/pci.h>
205 #include <linux/time.h>
206 #include <asm/io.h>
207 #include <asm/irq.h>
208 #include <asm/uaccess.h>
209 #include <scsi/scsi.h>
210 #include <scsi/scsi_host.h>
211 #include <scsi/scsi_tcq.h>
212 #include <scsi/scsi_cmnd.h>
213 #include "3w-xxxx.h"
214
215 /* Globals */
216 #define TW_DRIVER_VERSION "1.26.02.001"
217 static TW_Device_Extension *tw_device_extension_list[TW_MAX_SLOT];
218 static int tw_device_extension_count = 0;
219 static int twe_major = -1;
220
221 /* Module parameters */
222 MODULE_AUTHOR("AMCC");
223 MODULE_DESCRIPTION("3ware Storage Controller Linux Driver");
224 MODULE_LICENSE("GPL");
225 MODULE_VERSION(TW_DRIVER_VERSION);
226
227 /* Function prototypes */
228 static int tw_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset);
229
230 /* Functions */
231
232 /* This function will check the status register for unexpected bits */
233 static int tw_check_bits(u32 status_reg_value)
234 {
235 if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS) {
236 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): No expected bits (0x%x).\n", status_reg_value);
237 return 1;
238 }
239 if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0) {
240 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): Found unexpected bits (0x%x).\n", status_reg_value);
241 return 1;
242 }
243
244 return 0;
245 } /* End tw_check_bits() */
246
247 /* This function will print readable messages from status register errors */
248 static int tw_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value, int print_host)
249 {
250 char host[16];
251
252 dprintk(KERN_WARNING "3w-xxxx: tw_decode_bits()\n");
253
254 if (print_host)
255 sprintf(host, " scsi%d:", tw_dev->host->host_no);
256 else
257 host[0] = '\0';
258
259 if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) {
260 printk(KERN_WARNING "3w-xxxx:%s PCI Parity Error: clearing.\n", host);
261 outl(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
262 }
263
264 if (status_reg_value & TW_STATUS_PCI_ABORT) {
265 printk(KERN_WARNING "3w-xxxx:%s PCI Abort: clearing.\n", host);
266 outl(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev));
267 pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT);
268 }
269
270 if (status_reg_value & TW_STATUS_QUEUE_ERROR) {
271 printk(KERN_WARNING "3w-xxxx:%s Controller Queue Error: clearing.\n", host);
272 outl(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
273 }
274
275 if (status_reg_value & TW_STATUS_SBUF_WRITE_ERROR) {
276 printk(KERN_WARNING "3w-xxxx:%s SBUF Write Error: clearing.\n", host);
277 outl(TW_CONTROL_CLEAR_SBUF_WRITE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
278 }
279
280 if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
281 if (tw_dev->reset_print == 0) {
282 printk(KERN_WARNING "3w-xxxx:%s Microcontroller Error: clearing.\n", host);
283 tw_dev->reset_print = 1;
284 }
285 return 1;
286 }
287
288 return 0;
289 } /* End tw_decode_bits() */
290
291 /* This function will poll the status register for a flag */
292 static int tw_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds)
293 {
294 u32 status_reg_value;
295 unsigned long before;
296 int retval = 1;
297
298 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
299 before = jiffies;
300
301 if (tw_check_bits(status_reg_value))
302 tw_decode_bits(tw_dev, status_reg_value, 0);
303
304 while ((status_reg_value & flag) != flag) {
305 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
306
307 if (tw_check_bits(status_reg_value))
308 tw_decode_bits(tw_dev, status_reg_value, 0);
309
310 if (time_after(jiffies, before + HZ * seconds))
311 goto out;
312
313 msleep(50);
314 }
315 retval = 0;
316 out:
317 return retval;
318 } /* End tw_poll_status() */
319
320 /* This function will poll the status register for disappearance of a flag */
321 static int tw_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds)
322 {
323 u32 status_reg_value;
324 unsigned long before;
325 int retval = 1;
326
327 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
328 before = jiffies;
329
330 if (tw_check_bits(status_reg_value))
331 tw_decode_bits(tw_dev, status_reg_value, 0);
332
333 while ((status_reg_value & flag) != 0) {
334 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
335
336 if (tw_check_bits(status_reg_value))
337 tw_decode_bits(tw_dev, status_reg_value, 0);
338
339 if (time_after(jiffies, before + HZ * seconds))
340 goto out;
341
342 msleep(50);
343 }
344 retval = 0;
345 out:
346 return retval;
347 } /* End tw_poll_status_gone() */
348
349 /* This function will attempt to post a command packet to the board */
350 static int tw_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
351 {
352 u32 status_reg_value;
353 unsigned long command_que_value;
354
355 dprintk(KERN_NOTICE "3w-xxxx: tw_post_command_packet()\n");
356 command_que_value = tw_dev->command_packet_physical_address[request_id];
357 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
358
359 if (tw_check_bits(status_reg_value)) {
360 dprintk(KERN_WARNING "3w-xxxx: tw_post_command_packet(): Unexpected bits.\n");
361 tw_decode_bits(tw_dev, status_reg_value, 1);
362 }
363
364 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
365 /* We successfully posted the command packet */
366 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
367 tw_dev->state[request_id] = TW_S_POSTED;
368 tw_dev->posted_request_count++;
369 if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) {
370 tw_dev->max_posted_request_count = tw_dev->posted_request_count;
371 }
372 } else {
373 /* Couldn't post the command packet, so we do it in the isr */
374 if (tw_dev->state[request_id] != TW_S_PENDING) {
375 tw_dev->state[request_id] = TW_S_PENDING;
376 tw_dev->pending_request_count++;
377 if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) {
378 tw_dev->max_pending_request_count = tw_dev->pending_request_count;
379 }
380 tw_dev->pending_queue[tw_dev->pending_tail] = request_id;
381 if (tw_dev->pending_tail == TW_Q_LENGTH-1) {
382 tw_dev->pending_tail = TW_Q_START;
383 } else {
384 tw_dev->pending_tail = tw_dev->pending_tail + 1;
385 }
386 }
387 TW_UNMASK_COMMAND_INTERRUPT(tw_dev);
388 return 1;
389 }
390 return 0;
391 } /* End tw_post_command_packet() */
392
393 /* This function will return valid sense buffer information for failed cmds */
394 static int tw_decode_sense(TW_Device_Extension *tw_dev, int request_id, int fill_sense)
395 {
396 int i;
397 TW_Command *command;
398
399 dprintk(KERN_WARNING "3w-xxxx: tw_decode_sense()\n");
400 command = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
401
402 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));
403
404 /* Attempt to return intelligent sense information */
405 if (fill_sense) {
406 if ((command->status == 0xc7) || (command->status == 0xcb)) {
407 for (i=0;i<(sizeof(tw_sense_table)/sizeof(tw_sense_table[0]));i++) {
408 if (command->flags == tw_sense_table[i][0]) {
409
410 /* Valid bit and 'current errors' */
411 tw_dev->srb[request_id]->sense_buffer[0] = (0x1 << 7 | 0x70);
412
413 /* Sense key */
414 tw_dev->srb[request_id]->sense_buffer[2] = tw_sense_table[i][1];
415
416 /* Additional sense length */
417 tw_dev->srb[request_id]->sense_buffer[7] = 0xa; /* 10 bytes */
418
419 /* Additional sense code */
420 tw_dev->srb[request_id]->sense_buffer[12] = tw_sense_table[i][2];
421
422 /* Additional sense code qualifier */
423 tw_dev->srb[request_id]->sense_buffer[13] = tw_sense_table[i][3];
424
425 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
426 return TW_ISR_DONT_RESULT; /* Special case for isr to not over-write result */
427 }
428 }
429 }
430
431 /* If no table match, error so we get a reset */
432 return 1;
433 }
434
435 return 0;
436 } /* End tw_decode_sense() */
437
438 /* This function will report controller error status */
439 static int tw_check_errors(TW_Device_Extension *tw_dev)
440 {
441 u32 status_reg_value;
442
443 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
444
445 if (TW_STATUS_ERRORS(status_reg_value) || tw_check_bits(status_reg_value)) {
446 tw_decode_bits(tw_dev, status_reg_value, 0);
447 return 1;
448 }
449
450 return 0;
451 } /* End tw_check_errors() */
452
453 /* This function will empty the response que */
454 static void tw_empty_response_que(TW_Device_Extension *tw_dev)
455 {
456 u32 status_reg_value, response_que_value;
457
458 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
459
460 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
461 response_que_value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
462 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
463 }
464 } /* End tw_empty_response_que() */
465
466 /* This function will free a request_id */
467 static void tw_state_request_finish(TW_Device_Extension *tw_dev, int request_id)
468 {
469 tw_dev->free_queue[tw_dev->free_tail] = request_id;
470 tw_dev->state[request_id] = TW_S_FINISHED;
471 tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
472 } /* End tw_state_request_finish() */
473
474 /* This function will assign an available request_id */
475 static void tw_state_request_start(TW_Device_Extension *tw_dev, int *request_id)
476 {
477 *request_id = tw_dev->free_queue[tw_dev->free_head];
478 tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
479 tw_dev->state[*request_id] = TW_S_STARTED;
480 } /* End tw_state_request_start() */
481
482 /* Show some statistics about the card */
483 static ssize_t tw_show_stats(struct class_device *class_dev, char *buf)
484 {
485 struct Scsi_Host *host = class_to_shost(class_dev);
486 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
487 unsigned long flags = 0;
488 ssize_t len;
489
490 spin_lock_irqsave(tw_dev->host->host_lock, flags);
491 len = snprintf(buf, PAGE_SIZE, "3w-xxxx Driver version: %s\n"
492 "Current commands posted: %4d\n"
493 "Max commands posted: %4d\n"
494 "Current pending commands: %4d\n"
495 "Max pending commands: %4d\n"
496 "Last sgl length: %4d\n"
497 "Max sgl length: %4d\n"
498 "Last sector count: %4d\n"
499 "Max sector count: %4d\n"
500 "SCSI Host Resets: %4d\n"
501 "AEN's: %4d\n",
502 TW_DRIVER_VERSION,
503 tw_dev->posted_request_count,
504 tw_dev->max_posted_request_count,
505 tw_dev->pending_request_count,
506 tw_dev->max_pending_request_count,
507 tw_dev->sgl_entries,
508 tw_dev->max_sgl_entries,
509 tw_dev->sector_count,
510 tw_dev->max_sector_count,
511 tw_dev->num_resets,
512 tw_dev->aen_count);
513 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
514 return len;
515 } /* End tw_show_stats() */
516
517 /* This function will set a devices queue depth */
518 static int tw_change_queue_depth(struct scsi_device *sdev, int queue_depth)
519 {
520 if (queue_depth > TW_Q_LENGTH-2)
521 queue_depth = TW_Q_LENGTH-2;
522 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
523 return queue_depth;
524 } /* End tw_change_queue_depth() */
525
526 /* Create sysfs 'stats' entry */
527 static struct class_device_attribute tw_host_stats_attr = {
528 .attr = {
529 .name = "stats",
530 .mode = S_IRUGO,
531 },
532 .show = tw_show_stats
533 };
534
535 /* Host attributes initializer */
536 static struct class_device_attribute *tw_host_attrs[] = {
537 &tw_host_stats_attr,
538 NULL,
539 };
540
541 /* This function will read the aen queue from the isr */
542 static int tw_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
543 {
544 TW_Command *command_packet;
545 TW_Param *param;
546 unsigned long command_que_value;
547 u32 status_reg_value;
548 unsigned long param_value = 0;
549
550 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_read_queue()\n");
551
552 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
553 if (tw_check_bits(status_reg_value)) {
554 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Unexpected bits.\n");
555 tw_decode_bits(tw_dev, status_reg_value, 1);
556 return 1;
557 }
558 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
559 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet virtual address.\n");
560 return 1;
561 }
562 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
563 memset(command_packet, 0, sizeof(TW_Sector));
564 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
565 command_packet->size = 4;
566 command_packet->request_id = request_id;
567 command_packet->status = 0;
568 command_packet->flags = 0;
569 command_packet->byte6.parameter_count = 1;
570 command_que_value = tw_dev->command_packet_physical_address[request_id];
571 if (command_que_value == 0) {
572 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet physical address.\n");
573 return 1;
574 }
575 /* Now setup the param */
576 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
577 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment virtual address.\n");
578 return 1;
579 }
580 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
581 memset(param, 0, sizeof(TW_Sector));
582 param->table_id = 0x401; /* AEN table */
583 param->parameter_id = 2; /* Unit code */
584 param->parameter_size_bytes = 2;
585 param_value = tw_dev->alignment_physical_address[request_id];
586 if (param_value == 0) {
587 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment physical address.\n");
588 return 1;
589 }
590 command_packet->byte8.param.sgl[0].address = param_value;
591 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
592
593 /* Now post the command packet */
594 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
595 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post succeeded.\n");
596 tw_dev->srb[request_id] = NULL; /* Flag internal command */
597 tw_dev->state[request_id] = TW_S_POSTED;
598 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
599 } else {
600 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post failed, will retry.\n");
601 return 1;
602 }
603
604 return 0;
605 } /* End tw_aen_read_queue() */
606
607 /* This function will complete an aen request from the isr */
608 static int tw_aen_complete(TW_Device_Extension *tw_dev, int request_id)
609 {
610 TW_Param *param;
611 unsigned short aen;
612 int error = 0, table_max = 0;
613
614 dprintk(KERN_WARNING "3w-xxxx: tw_aen_complete()\n");
615 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
616 printk(KERN_WARNING "3w-xxxx: tw_aen_complete(): Bad alignment virtual address.\n");
617 return 1;
618 }
619 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
620 aen = *(unsigned short *)(param->data);
621 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_complete(): Queue'd code 0x%x\n", aen);
622
623 /* Print some useful info when certain aen codes come out */
624 if (aen == 0x0ff) {
625 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: INFO: AEN queue overflow.\n", tw_dev->host->host_no);
626 } else {
627 table_max = sizeof(tw_aen_string)/sizeof(char *);
628 if ((aen & 0x0ff) < table_max) {
629 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
630 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s%d.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff], aen >> 8);
631 } else {
632 if (aen != 0x0)
633 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff]);
634 }
635 } else {
636 printk(KERN_WARNING "3w-xxxx: scsi%d: Received AEN %d.\n", tw_dev->host->host_no, aen);
637 }
638 }
639 if (aen != TW_AEN_QUEUE_EMPTY) {
640 tw_dev->aen_count++;
641
642 /* Now queue the code */
643 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
644 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
645 tw_dev->aen_tail = TW_Q_START;
646 } else {
647 tw_dev->aen_tail = tw_dev->aen_tail + 1;
648 }
649 if (tw_dev->aen_head == tw_dev->aen_tail) {
650 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
651 tw_dev->aen_head = TW_Q_START;
652 } else {
653 tw_dev->aen_head = tw_dev->aen_head + 1;
654 }
655 }
656
657 error = tw_aen_read_queue(tw_dev, request_id);
658 if (error) {
659 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing AEN.\n", tw_dev->host->host_no);
660 tw_dev->state[request_id] = TW_S_COMPLETED;
661 tw_state_request_finish(tw_dev, request_id);
662 }
663 } else {
664 tw_dev->state[request_id] = TW_S_COMPLETED;
665 tw_state_request_finish(tw_dev, request_id);
666 }
667
668 return 0;
669 } /* End tw_aen_complete() */
670
671 /* This function will drain the aen queue after a soft reset */
672 static int tw_aen_drain_queue(TW_Device_Extension *tw_dev)
673 {
674 TW_Command *command_packet;
675 TW_Param *param;
676 int request_id = 0;
677 unsigned long command_que_value;
678 unsigned long param_value;
679 TW_Response_Queue response_queue;
680 unsigned short aen;
681 unsigned short aen_code;
682 int finished = 0;
683 int first_reset = 0;
684 int queue = 0;
685 int found = 0, table_max = 0;
686
687 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_drain_queue()\n");
688
689 if (tw_poll_status(tw_dev, TW_STATUS_ATTENTION_INTERRUPT | TW_STATUS_MICROCONTROLLER_READY, 30)) {
690 dprintk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): No attention interrupt for card %d.\n", tw_device_extension_count);
691 return 1;
692 }
693 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
694
695 /* Empty response queue */
696 tw_empty_response_que(tw_dev);
697
698 /* Initialize command packet */
699 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
700 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet virtual address.\n");
701 return 1;
702 }
703 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
704 memset(command_packet, 0, sizeof(TW_Sector));
705 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
706 command_packet->size = 4;
707 command_packet->request_id = request_id;
708 command_packet->status = 0;
709 command_packet->flags = 0;
710 command_packet->byte6.parameter_count = 1;
711 command_que_value = tw_dev->command_packet_physical_address[request_id];
712 if (command_que_value == 0) {
713 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet physical address.\n");
714 return 1;
715 }
716
717 /* Now setup the param */
718 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
719 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment virtual address.\n");
720 return 1;
721 }
722 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
723 memset(param, 0, sizeof(TW_Sector));
724 param->table_id = 0x401; /* AEN table */
725 param->parameter_id = 2; /* Unit code */
726 param->parameter_size_bytes = 2;
727 param_value = tw_dev->alignment_physical_address[request_id];
728 if (param_value == 0) {
729 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment physical address.\n");
730 return 1;
731 }
732 command_packet->byte8.param.sgl[0].address = param_value;
733 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
734
735 /* Now drain the controller's aen queue */
736 do {
737 /* Post command packet */
738 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
739
740 /* Now poll for completion */
741 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
742 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
743 request_id = TW_RESID_OUT(response_queue.response_id);
744
745 if (request_id != 0) {
746 /* Unexpected request id */
747 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Unexpected request id.\n");
748 return 1;
749 }
750
751 if (command_packet->status != 0) {
752 if (command_packet->flags != TW_AEN_TABLE_UNDEFINED) {
753 /* Bad response */
754 tw_decode_sense(tw_dev, request_id, 0);
755 return 1;
756 } else {
757 /* We know this is a 3w-1x00, and doesn't support aen's */
758 return 0;
759 }
760 }
761
762 /* Now check the aen */
763 aen = *(unsigned short *)(param->data);
764 aen_code = (aen & 0x0ff);
765 queue = 0;
766 switch (aen_code) {
767 case TW_AEN_QUEUE_EMPTY:
768 dprintk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
769 if (first_reset != 1) {
770 return 1;
771 } else {
772 finished = 1;
773 }
774 break;
775 case TW_AEN_SOFT_RESET:
776 if (first_reset == 0) {
777 first_reset = 1;
778 } else {
779 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
780 tw_dev->aen_count++;
781 queue = 1;
782 }
783 break;
784 default:
785 if (aen == 0x0ff) {
786 printk(KERN_WARNING "3w-xxxx: AEN: INFO: AEN queue overflow.\n");
787 } else {
788 table_max = sizeof(tw_aen_string)/sizeof(char *);
789 if ((aen & 0x0ff) < table_max) {
790 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
791 printk(KERN_WARNING "3w-xxxx: AEN: %s%d.\n", tw_aen_string[aen & 0xff], aen >> 8);
792 } else {
793 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
794 }
795 } else
796 printk(KERN_WARNING "3w-xxxx: Received AEN %d.\n", aen);
797 }
798 tw_dev->aen_count++;
799 queue = 1;
800 }
801
802 /* Now put the aen on the aen_queue */
803 if (queue == 1) {
804 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
805 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
806 tw_dev->aen_tail = TW_Q_START;
807 } else {
808 tw_dev->aen_tail = tw_dev->aen_tail + 1;
809 }
810 if (tw_dev->aen_head == tw_dev->aen_tail) {
811 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
812 tw_dev->aen_head = TW_Q_START;
813 } else {
814 tw_dev->aen_head = tw_dev->aen_head + 1;
815 }
816 }
817 }
818 found = 1;
819 }
820 if (found == 0) {
821 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Response never received.\n");
822 return 1;
823 }
824 } while (finished == 0);
825
826 return 0;
827 } /* End tw_aen_drain_queue() */
828
829 /* This function will allocate memory */
830 static int tw_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
831 {
832 int i;
833 dma_addr_t dma_handle;
834 unsigned long *cpu_addr = NULL;
835
836 dprintk(KERN_NOTICE "3w-xxxx: tw_allocate_memory()\n");
837
838 cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
839 if (cpu_addr == NULL) {
840 printk(KERN_WARNING "3w-xxxx: pci_alloc_consistent() 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 pci_free_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, cpu_addr, dma_handle);
847 return 1;
848 }
849
850 memset(cpu_addr, 0, size*TW_Q_LENGTH);
851
852 for (i=0;i<TW_Q_LENGTH;i++) {
853 switch(which) {
854 case 0:
855 tw_dev->command_packet_physical_address[i] = dma_handle+(i*size);
856 tw_dev->command_packet_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
857 break;
858 case 1:
859 tw_dev->alignment_physical_address[i] = dma_handle+(i*size);
860 tw_dev->alignment_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
861 break;
862 default:
863 printk(KERN_WARNING "3w-xxxx: tw_allocate_memory(): case slip in tw_allocate_memory()\n");
864 return 1;
865 }
866 }
867
868 return 0;
869 } /* End tw_allocate_memory() */
870
871 /* This function handles ioctl for the character device */
872 static int tw_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
873 {
874 int request_id;
875 dma_addr_t dma_handle;
876 unsigned short tw_aen_code;
877 unsigned long flags;
878 unsigned int data_buffer_length = 0;
879 unsigned long data_buffer_length_adjusted = 0;
880 unsigned long *cpu_addr;
881 long timeout;
882 TW_New_Ioctl *tw_ioctl;
883 TW_Passthru *passthru;
884 TW_Device_Extension *tw_dev = tw_device_extension_list[iminor(inode)];
885 int retval = -EFAULT;
886 void __user *argp = (void __user *)arg;
887
888 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl()\n");
889
890 /* Only let one of these through at a time */
891 if (down_interruptible(&tw_dev->ioctl_sem))
892 return -EINTR;
893
894 /* First copy down the buffer length */
895 if (copy_from_user(&data_buffer_length, argp, sizeof(unsigned int)))
896 goto out;
897
898 /* Check size */
899 if (data_buffer_length > TW_MAX_IOCTL_SECTORS * 512) {
900 retval = -EINVAL;
901 goto out;
902 }
903
904 /* Hardware can only do multiple of 512 byte transfers */
905 data_buffer_length_adjusted = (data_buffer_length + 511) & ~511;
906
907 /* Now allocate ioctl buf memory */
908 cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, &dma_handle, GFP_KERNEL);
909 if (cpu_addr == NULL) {
910 retval = -ENOMEM;
911 goto out;
912 }
913
914 tw_ioctl = (TW_New_Ioctl *)cpu_addr;
915
916 /* Now copy down the entire ioctl */
917 if (copy_from_user(tw_ioctl, argp, data_buffer_length + sizeof(TW_New_Ioctl) - 1))
918 goto out2;
919
920 passthru = (TW_Passthru *)&tw_ioctl->firmware_command;
921
922 /* See which ioctl we are doing */
923 switch (cmd) {
924 case TW_OP_NOP:
925 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_OP_NOP.\n");
926 break;
927 case TW_OP_AEN_LISTEN:
928 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_AEN_LISTEN.\n");
929 memset(tw_ioctl->data_buffer, 0, data_buffer_length);
930
931 spin_lock_irqsave(tw_dev->host->host_lock, flags);
932 if (tw_dev->aen_head == tw_dev->aen_tail) {
933 tw_aen_code = TW_AEN_QUEUE_EMPTY;
934 } else {
935 tw_aen_code = tw_dev->aen_queue[tw_dev->aen_head];
936 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
937 tw_dev->aen_head = TW_Q_START;
938 } else {
939 tw_dev->aen_head = tw_dev->aen_head + 1;
940 }
941 }
942 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
943 memcpy(tw_ioctl->data_buffer, &tw_aen_code, sizeof(tw_aen_code));
944 break;
945 case TW_CMD_PACKET_WITH_DATA:
946 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_CMD_PACKET_WITH_DATA.\n");
947 spin_lock_irqsave(tw_dev->host->host_lock, flags);
948
949 tw_state_request_start(tw_dev, &request_id);
950
951 /* Flag internal command */
952 tw_dev->srb[request_id] = NULL;
953
954 /* Flag chrdev ioctl */
955 tw_dev->chrdev_request_id = request_id;
956
957 tw_ioctl->firmware_command.request_id = request_id;
958
959 /* Load the sg list */
960 switch (TW_SGL_OUT(tw_ioctl->firmware_command.opcode__sgloffset)) {
961 case 2:
962 tw_ioctl->firmware_command.byte8.param.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
963 tw_ioctl->firmware_command.byte8.param.sgl[0].length = data_buffer_length_adjusted;
964 break;
965 case 3:
966 tw_ioctl->firmware_command.byte8.io.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
967 tw_ioctl->firmware_command.byte8.io.sgl[0].length = data_buffer_length_adjusted;
968 break;
969 case 5:
970 passthru->sg_list[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
971 passthru->sg_list[0].length = data_buffer_length_adjusted;
972 break;
973 }
974
975 memcpy(tw_dev->command_packet_virtual_address[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command));
976
977 /* Now post the command packet to the controller */
978 tw_post_command_packet(tw_dev, request_id);
979 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
980
981 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
982
983 /* Now wait for the command to complete */
984 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
985
986 /* See if we reset while waiting for the ioctl to complete */
987 if (test_bit(TW_IN_RESET, &tw_dev->flags)) {
988 clear_bit(TW_IN_RESET, &tw_dev->flags);
989 retval = -ERESTARTSYS;
990 goto out2;
991 }
992
993 /* We timed out, and didn't get an interrupt */
994 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
995 /* Now we need to reset the board */
996 printk(KERN_WARNING "3w-xxxx: scsi%d: Character ioctl (0x%x) timed out, resetting card.\n", tw_dev->host->host_no, cmd);
997 retval = -EIO;
998 spin_lock_irqsave(tw_dev->host->host_lock, flags);
999 tw_dev->state[request_id] = TW_S_COMPLETED;
1000 tw_state_request_finish(tw_dev, request_id);
1001 tw_dev->posted_request_count--;
1002 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1003 if (tw_reset_device_extension(tw_dev, 1)) {
1004 printk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): Reset failed for card %d.\n", tw_dev->host->host_no);
1005 }
1006 goto out2;
1007 }
1008
1009 /* Now copy in the command packet response */
1010 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virtual_address[request_id], sizeof(TW_Command));
1011
1012 /* Now complete the io */
1013 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1014 tw_dev->posted_request_count--;
1015 tw_dev->state[request_id] = TW_S_COMPLETED;
1016 tw_state_request_finish(tw_dev, request_id);
1017 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1018 break;
1019 default:
1020 retval = -ENOTTY;
1021 goto out2;
1022 }
1023
1024 /* Now copy the response to userspace */
1025 if (copy_to_user(argp, tw_ioctl, sizeof(TW_New_Ioctl) + data_buffer_length - 1))
1026 goto out2;
1027 retval = 0;
1028 out2:
1029 /* Now free ioctl buf memory */
1030 dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, cpu_addr, dma_handle);
1031 out:
1032 up(&tw_dev->ioctl_sem);
1033 return retval;
1034 } /* End tw_chrdev_ioctl() */
1035
1036 /* This function handles open for the character device */
1037 static int tw_chrdev_open(struct inode *inode, struct file *file)
1038 {
1039 unsigned int minor_number;
1040
1041 dprintk(KERN_WARNING "3w-xxxx: tw_ioctl_open()\n");
1042
1043 minor_number = iminor(inode);
1044 if (minor_number >= tw_device_extension_count)
1045 return -ENODEV;
1046
1047 return 0;
1048 } /* End tw_chrdev_open() */
1049
1050 /* File operations struct for character device */
1051 static struct file_operations tw_fops = {
1052 .owner = THIS_MODULE,
1053 .ioctl = tw_chrdev_ioctl,
1054 .open = tw_chrdev_open,
1055 .release = NULL
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 pci_free_consistent(tw_dev->tw_pci_dev, sizeof(TW_Command)*TW_Q_LENGTH, tw_dev->command_packet_virtual_address[0], tw_dev->command_packet_physical_address[0]);
1066
1067 if (tw_dev->alignment_virtual_address[0])
1068 pci_free_consistent(tw_dev->tw_pci_dev, sizeof(TW_Sector)*TW_Q_LENGTH, tw_dev->alignment_virtual_address[0], tw_dev->alignment_physical_address[0]);
1069 } /* End tw_free_device_extension() */
1070
1071 /* This function will send an initconnection command to controller */
1072 static int tw_initconnection(TW_Device_Extension *tw_dev, int message_credits)
1073 {
1074 unsigned long command_que_value;
1075 TW_Command *command_packet;
1076 TW_Response_Queue response_queue;
1077 int request_id = 0;
1078
1079 dprintk(KERN_NOTICE "3w-xxxx: tw_initconnection()\n");
1080
1081 /* Initialize InitConnection command packet */
1082 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1083 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet virtual address.\n");
1084 return 1;
1085 }
1086
1087 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1088 memset(command_packet, 0, sizeof(TW_Sector));
1089 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_INIT_CONNECTION);
1090 command_packet->size = TW_INIT_COMMAND_PACKET_SIZE;
1091 command_packet->request_id = request_id;
1092 command_packet->status = 0x0;
1093 command_packet->flags = 0x0;
1094 command_packet->byte6.message_credits = message_credits;
1095 command_packet->byte8.init_connection.response_queue_pointer = 0x0;
1096 command_que_value = tw_dev->command_packet_physical_address[request_id];
1097
1098 if (command_que_value == 0) {
1099 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet physical address.\n");
1100 return 1;
1101 }
1102
1103 /* Send command packet to the board */
1104 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1105
1106 /* Poll for completion */
1107 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1108 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1109 request_id = TW_RESID_OUT(response_queue.response_id);
1110
1111 if (request_id != 0) {
1112 /* unexpected request id */
1113 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Unexpected request id.\n");
1114 return 1;
1115 }
1116 if (command_packet->status != 0) {
1117 /* bad response */
1118 tw_decode_sense(tw_dev, request_id, 0);
1119 return 1;
1120 }
1121 }
1122 return 0;
1123 } /* End tw_initconnection() */
1124
1125 /* Set a value in the features table */
1126 static int tw_setfeature(TW_Device_Extension *tw_dev, int parm, int param_size,
1127 unsigned char *val)
1128 {
1129 TW_Param *param;
1130 TW_Command *command_packet;
1131 TW_Response_Queue response_queue;
1132 int request_id = 0;
1133 unsigned long command_que_value;
1134 unsigned long param_value;
1135
1136 /* Initialize SetParam command packet */
1137 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1138 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet virtual address.\n");
1139 return 1;
1140 }
1141 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1142 memset(command_packet, 0, sizeof(TW_Sector));
1143 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1144
1145 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
1146 param->table_id = 0x404; /* Features table */
1147 param->parameter_id = parm;
1148 param->parameter_size_bytes = param_size;
1149 memcpy(param->data, val, param_size);
1150
1151 param_value = tw_dev->alignment_physical_address[request_id];
1152 if (param_value == 0) {
1153 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad alignment physical address.\n");
1154 tw_dev->state[request_id] = TW_S_COMPLETED;
1155 tw_state_request_finish(tw_dev, request_id);
1156 tw_dev->srb[request_id]->result = (DID_OK << 16);
1157 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1158 }
1159 command_packet->byte8.param.sgl[0].address = param_value;
1160 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1161
1162 command_packet->size = 4;
1163 command_packet->request_id = request_id;
1164 command_packet->byte6.parameter_count = 1;
1165
1166 command_que_value = tw_dev->command_packet_physical_address[request_id];
1167 if (command_que_value == 0) {
1168 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet physical address.\n");
1169 return 1;
1170 }
1171
1172 /* Send command packet to the board */
1173 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1174
1175 /* Poll for completion */
1176 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1177 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1178 request_id = TW_RESID_OUT(response_queue.response_id);
1179
1180 if (request_id != 0) {
1181 /* unexpected request id */
1182 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Unexpected request id.\n");
1183 return 1;
1184 }
1185 if (command_packet->status != 0) {
1186 /* bad response */
1187 tw_decode_sense(tw_dev, request_id, 0);
1188 return 1;
1189 }
1190 }
1191
1192 return 0;
1193 } /* End tw_setfeature() */
1194
1195 /* This function will reset a controller */
1196 static int tw_reset_sequence(TW_Device_Extension *tw_dev)
1197 {
1198 int error = 0;
1199 int tries = 0;
1200 unsigned char c = 1;
1201
1202 /* Reset the board */
1203 while (tries < TW_MAX_RESET_TRIES) {
1204 TW_SOFT_RESET(tw_dev);
1205
1206 error = tw_aen_drain_queue(tw_dev);
1207 if (error) {
1208 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN drain failed, retrying.\n", tw_dev->host->host_no);
1209 tries++;
1210 continue;
1211 }
1212
1213 /* Check for controller errors */
1214 if (tw_check_errors(tw_dev)) {
1215 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors found, retrying.\n", tw_dev->host->host_no);
1216 tries++;
1217 continue;
1218 }
1219
1220 /* Now the controller is in a good state */
1221 break;
1222 }
1223
1224 if (tries >= TW_MAX_RESET_TRIES) {
1225 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors, card not responding, check all cabling.\n", tw_dev->host->host_no);
1226 return 1;
1227 }
1228
1229 error = tw_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS);
1230 if (error) {
1231 printk(KERN_WARNING "3w-xxxx: scsi%d: Connection initialization failed.\n", tw_dev->host->host_no);
1232 return 1;
1233 }
1234
1235 error = tw_setfeature(tw_dev, 2, 1, &c);
1236 if (error) {
1237 printk(KERN_WARNING "3w-xxxx: Unable to set features for card, probable old firmware or card.\n");
1238 }
1239
1240 return 0;
1241 } /* End tw_reset_sequence() */
1242
1243 /* This function will initialize the fields of a device extension */
1244 static int tw_initialize_device_extension(TW_Device_Extension *tw_dev)
1245 {
1246 int i, error=0;
1247
1248 dprintk(KERN_NOTICE "3w-xxxx: tw_initialize_device_extension()\n");
1249
1250 /* Initialize command packet buffers */
1251 error = tw_allocate_memory(tw_dev, sizeof(TW_Command), 0);
1252 if (error) {
1253 printk(KERN_WARNING "3w-xxxx: Command packet memory allocation failed.\n");
1254 return 1;
1255 }
1256
1257 /* Initialize generic buffer */
1258 error = tw_allocate_memory(tw_dev, sizeof(TW_Sector), 1);
1259 if (error) {
1260 printk(KERN_WARNING "3w-xxxx: Generic memory allocation failed.\n");
1261 return 1;
1262 }
1263
1264 for (i=0;i<TW_Q_LENGTH;i++) {
1265 tw_dev->free_queue[i] = i;
1266 tw_dev->state[i] = TW_S_INITIAL;
1267 }
1268
1269 tw_dev->pending_head = TW_Q_START;
1270 tw_dev->pending_tail = TW_Q_START;
1271 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1272
1273 init_MUTEX(&tw_dev->ioctl_sem);
1274 init_waitqueue_head(&tw_dev->ioctl_wqueue);
1275
1276 return 0;
1277 } /* End tw_initialize_device_extension() */
1278
1279 static int tw_map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
1280 {
1281 int use_sg;
1282
1283 dprintk(KERN_WARNING "3w-xxxx: tw_map_scsi_sg_data()\n");
1284
1285 if (cmd->use_sg == 0)
1286 return 0;
1287
1288 use_sg = pci_map_sg(pdev, cmd->buffer, cmd->use_sg, DMA_BIDIRECTIONAL);
1289
1290 if (use_sg == 0) {
1291 printk(KERN_WARNING "3w-xxxx: tw_map_scsi_sg_data(): pci_map_sg() failed.\n");
1292 return 0;
1293 }
1294
1295 cmd->SCp.phase = TW_PHASE_SGLIST;
1296 cmd->SCp.have_data_in = use_sg;
1297
1298 return use_sg;
1299 } /* End tw_map_scsi_sg_data() */
1300
1301 static u32 tw_map_scsi_single_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
1302 {
1303 dma_addr_t mapping;
1304
1305 dprintk(KERN_WARNING "3w-xxxx: tw_map_scsi_single_data()\n");
1306
1307 if (cmd->request_bufflen == 0)
1308 return 0;
1309
1310 mapping = pci_map_page(pdev, virt_to_page(cmd->request_buffer), offset_in_page(cmd->request_buffer), cmd->request_bufflen, DMA_BIDIRECTIONAL);
1311
1312 if (mapping == 0) {
1313 printk(KERN_WARNING "3w-xxxx: tw_map_scsi_single_data(): pci_map_page() failed.\n");
1314 return 0;
1315 }
1316
1317 cmd->SCp.phase = TW_PHASE_SINGLE;
1318 cmd->SCp.have_data_in = mapping;
1319
1320 return mapping;
1321 } /* End tw_map_scsi_single_data() */
1322
1323 static void tw_unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
1324 {
1325 dprintk(KERN_WARNING "3w-xxxx: tw_unmap_scsi_data()\n");
1326
1327 switch(cmd->SCp.phase) {
1328 case TW_PHASE_SINGLE:
1329 pci_unmap_page(pdev, cmd->SCp.have_data_in, cmd->request_bufflen, DMA_BIDIRECTIONAL);
1330 break;
1331 case TW_PHASE_SGLIST:
1332 pci_unmap_sg(pdev, cmd->request_buffer, cmd->use_sg, DMA_BIDIRECTIONAL);
1333 break;
1334 }
1335 } /* End tw_unmap_scsi_data() */
1336
1337 /* This function will reset a device extension */
1338 static int tw_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset)
1339 {
1340 int i = 0;
1341 struct scsi_cmnd *srb;
1342 unsigned long flags = 0;
1343
1344 dprintk(KERN_NOTICE "3w-xxxx: tw_reset_device_extension()\n");
1345
1346 set_bit(TW_IN_RESET, &tw_dev->flags);
1347 TW_DISABLE_INTERRUPTS(tw_dev);
1348 TW_MASK_COMMAND_INTERRUPT(tw_dev);
1349 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1350
1351 /* Abort all requests that are in progress */
1352 for (i=0;i<TW_Q_LENGTH;i++) {
1353 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1354 (tw_dev->state[i] != TW_S_INITIAL) &&
1355 (tw_dev->state[i] != TW_S_COMPLETED)) {
1356 srb = tw_dev->srb[i];
1357 if (srb != NULL) {
1358 srb->result = (DID_RESET << 16);
1359 tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);
1360 tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[i]);
1361 }
1362 }
1363 }
1364
1365 /* Reset queues and counts */
1366 for (i=0;i<TW_Q_LENGTH;i++) {
1367 tw_dev->free_queue[i] = i;
1368 tw_dev->state[i] = TW_S_INITIAL;
1369 }
1370 tw_dev->free_head = TW_Q_START;
1371 tw_dev->free_tail = TW_Q_START;
1372 tw_dev->posted_request_count = 0;
1373 tw_dev->pending_request_count = 0;
1374 tw_dev->pending_head = TW_Q_START;
1375 tw_dev->pending_tail = TW_Q_START;
1376 tw_dev->reset_print = 0;
1377
1378 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1379
1380 if (tw_reset_sequence(tw_dev)) {
1381 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset sequence failed.\n", tw_dev->host->host_no);
1382 return 1;
1383 }
1384 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
1385
1386 /* Wake up any ioctl that was pending before the reset */
1387 if ((tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE) || (ioctl_reset)) {
1388 clear_bit(TW_IN_RESET, &tw_dev->flags);
1389 } else {
1390 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1391 wake_up(&tw_dev->ioctl_wqueue);
1392 }
1393
1394 return 0;
1395 } /* End tw_reset_device_extension() */
1396
1397 /* This funciton returns unit geometry in cylinders/heads/sectors */
1398 static int tw_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev,
1399 sector_t capacity, int geom[])
1400 {
1401 int heads, sectors, cylinders;
1402 TW_Device_Extension *tw_dev;
1403
1404 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam()\n");
1405 tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
1406
1407 heads = 64;
1408 sectors = 32;
1409 cylinders = sector_div(capacity, heads * sectors);
1410
1411 if (capacity >= 0x200000) {
1412 heads = 255;
1413 sectors = 63;
1414 cylinders = sector_div(capacity, heads * sectors);
1415 }
1416
1417 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam(): heads = %d, sectors = %d, cylinders = %d\n", heads, sectors, cylinders);
1418 geom[0] = heads;
1419 geom[1] = sectors;
1420 geom[2] = cylinders;
1421
1422 return 0;
1423 } /* End tw_scsi_biosparam() */
1424
1425 /* This is the new scsi eh reset function */
1426 static int tw_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1427 {
1428 TW_Device_Extension *tw_dev=NULL;
1429 int retval = FAILED;
1430
1431 tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1432
1433 spin_unlock_irq(tw_dev->host->host_lock);
1434
1435 tw_dev->num_resets++;
1436
1437 printk(KERN_WARNING "3w-xxxx: scsi%d: WARNING: Unit #%d: Command (0x%x) timed out, resetting card.\n", tw_dev->host->host_no, SCpnt->device->id, SCpnt->cmnd[0]);
1438
1439 /* Now reset the card and some of the device extension data */
1440 if (tw_reset_device_extension(tw_dev, 0)) {
1441 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset failed.\n", tw_dev->host->host_no);
1442 goto out;
1443 }
1444
1445 retval = SUCCESS;
1446 out:
1447 spin_lock_irq(tw_dev->host->host_lock);
1448 return retval;
1449 } /* End tw_scsi_eh_reset() */
1450
1451 /* This function handles scsi inquiry commands */
1452 static int tw_scsiop_inquiry(TW_Device_Extension *tw_dev, int request_id)
1453 {
1454 TW_Param *param;
1455 TW_Command *command_packet;
1456 unsigned long command_que_value;
1457 unsigned long param_value;
1458
1459 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry()\n");
1460
1461 /* Initialize command packet */
1462 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1463 if (command_packet == NULL) {
1464 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet virtual address.\n");
1465 return 1;
1466 }
1467 memset(command_packet, 0, sizeof(TW_Sector));
1468 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1469 command_packet->size = 4;
1470 command_packet->request_id = request_id;
1471 command_packet->status = 0;
1472 command_packet->flags = 0;
1473 command_packet->byte6.parameter_count = 1;
1474
1475 /* Now setup the param */
1476 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1477 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment virtual address.\n");
1478 return 1;
1479 }
1480 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1481 memset(param, 0, sizeof(TW_Sector));
1482 param->table_id = 3; /* unit summary table */
1483 param->parameter_id = 3; /* unitsstatus parameter */
1484 param->parameter_size_bytes = TW_MAX_UNITS;
1485 param_value = tw_dev->alignment_physical_address[request_id];
1486 if (param_value == 0) {
1487 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment physical address.\n");
1488 return 1;
1489 }
1490
1491 command_packet->byte8.param.sgl[0].address = param_value;
1492 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1493 command_que_value = tw_dev->command_packet_physical_address[request_id];
1494 if (command_que_value == 0) {
1495 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet physical address.\n");
1496 return 1;
1497 }
1498
1499 /* Now try to post the command packet */
1500 tw_post_command_packet(tw_dev, request_id);
1501
1502 return 0;
1503 } /* End tw_scsiop_inquiry() */
1504
1505 /* This function is called by the isr to complete an inquiry command */
1506 static int tw_scsiop_inquiry_complete(TW_Device_Extension *tw_dev, int request_id)
1507 {
1508 unsigned char *is_unit_present;
1509 unsigned char *request_buffer;
1510 TW_Param *param;
1511
1512 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry_complete()\n");
1513
1514 /* Fill request buffer */
1515 if (tw_dev->srb[request_id]->request_buffer == NULL) {
1516 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry_complete(): Request buffer NULL.\n");
1517 return 1;
1518 }
1519 request_buffer = tw_dev->srb[request_id]->request_buffer;
1520 memset(request_buffer, 0, tw_dev->srb[request_id]->request_bufflen);
1521 request_buffer[0] = TYPE_DISK; /* Peripheral device type */
1522 request_buffer[1] = 0; /* Device type modifier */
1523 request_buffer[2] = 0; /* No ansi/iso compliance */
1524 request_buffer[4] = 31; /* Additional length */
1525 memcpy(&request_buffer[8], "3ware ", 8); /* Vendor ID */
1526 sprintf(&request_buffer[16], "Logical Disk %-2d ", tw_dev->srb[request_id]->device->id);
1527 memcpy(&request_buffer[32], TW_DRIVER_VERSION, 3);
1528
1529 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1530 if (param == NULL) {
1531 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry_complete(): Bad alignment virtual address.\n");
1532 return 1;
1533 }
1534 is_unit_present = &(param->data[0]);
1535
1536 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1537 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1538 } else {
1539 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1540 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1541 return TW_ISR_DONT_RESULT;
1542 }
1543
1544 return 0;
1545 } /* End tw_scsiop_inquiry_complete() */
1546
1547 /* This function handles scsi mode_sense commands */
1548 static int tw_scsiop_mode_sense(TW_Device_Extension *tw_dev, int request_id)
1549 {
1550 TW_Param *param;
1551 TW_Command *command_packet;
1552 unsigned long command_que_value;
1553 unsigned long param_value;
1554
1555 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense()\n");
1556
1557 /* Only page control = 0, page code = 0x8 (cache page) supported */
1558 if (tw_dev->srb[request_id]->cmnd[2] != 0x8) {
1559 tw_dev->state[request_id] = TW_S_COMPLETED;
1560 tw_state_request_finish(tw_dev, request_id);
1561 tw_dev->srb[request_id]->result = (DID_OK << 16);
1562 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1563 return 0;
1564 }
1565
1566 /* Now read firmware cache setting for this unit */
1567 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1568 if (command_packet == NULL) {
1569 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet virtual address.\n");
1570 return 1;
1571 }
1572
1573 /* Setup the command packet */
1574 memset(command_packet, 0, sizeof(TW_Sector));
1575 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1576 command_packet->size = 4;
1577 command_packet->request_id = request_id;
1578 command_packet->status = 0;
1579 command_packet->flags = 0;
1580 command_packet->byte6.parameter_count = 1;
1581
1582 /* Setup the param */
1583 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1584 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment virtual address.\n");
1585 return 1;
1586 }
1587
1588 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1589 memset(param, 0, sizeof(TW_Sector));
1590 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE + tw_dev->srb[request_id]->device->id;
1591 param->parameter_id = 7; /* unit flags */
1592 param->parameter_size_bytes = 1;
1593 param_value = tw_dev->alignment_physical_address[request_id];
1594 if (param_value == 0) {
1595 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment physical address.\n");
1596 return 1;
1597 }
1598
1599 command_packet->byte8.param.sgl[0].address = param_value;
1600 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1601 command_que_value = tw_dev->command_packet_physical_address[request_id];
1602 if (command_que_value == 0) {
1603 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet physical address.\n");
1604 return 1;
1605 }
1606
1607 /* Now try to post the command packet */
1608 tw_post_command_packet(tw_dev, request_id);
1609
1610 return 0;
1611 } /* End tw_scsiop_mode_sense() */
1612
1613 /* This function is called by the isr to complete a mode sense command */
1614 static int tw_scsiop_mode_sense_complete(TW_Device_Extension *tw_dev, int request_id)
1615 {
1616 TW_Param *param;
1617 unsigned char *flags;
1618 unsigned char *request_buffer;
1619
1620 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense_complete()\n");
1621
1622 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1623 if (param == NULL) {
1624 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense_complete(): Bad alignment virtual address.\n");
1625 return 1;
1626 }
1627 flags = (char *)&(param->data[0]);
1628 request_buffer = tw_dev->srb[request_id]->buffer;
1629 memset(request_buffer, 0, tw_dev->srb[request_id]->request_bufflen);
1630
1631 request_buffer[0] = 0xf; /* mode data length */
1632 request_buffer[1] = 0; /* default medium type */
1633 request_buffer[2] = 0x10; /* dpo/fua support on */
1634 request_buffer[3] = 0; /* no block descriptors */
1635 request_buffer[4] = 0x8; /* caching page */
1636 request_buffer[5] = 0xa; /* page length */
1637 if (*flags & 0x1)
1638 request_buffer[6] = 0x4; /* WCE on */
1639 else
1640 request_buffer[6] = 0x0; /* WCE off */
1641
1642 return 0;
1643 } /* End tw_scsiop_mode_sense_complete() */
1644
1645 /* This function handles scsi read_capacity commands */
1646 static int tw_scsiop_read_capacity(TW_Device_Extension *tw_dev, int request_id)
1647 {
1648 TW_Param *param;
1649 TW_Command *command_packet;
1650 unsigned long command_que_value;
1651 unsigned long param_value;
1652
1653 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity()\n");
1654
1655 /* Initialize command packet */
1656 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1657
1658 if (command_packet == NULL) {
1659 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet virtual address.\n");
1660 return 1;
1661 }
1662 memset(command_packet, 0, sizeof(TW_Sector));
1663 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1664 command_packet->size = 4;
1665 command_packet->request_id = request_id;
1666 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1667 command_packet->status = 0;
1668 command_packet->flags = 0;
1669 command_packet->byte6.block_count = 1;
1670
1671 /* Now setup the param */
1672 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1673 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment virtual address.\n");
1674 return 1;
1675 }
1676 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1677 memset(param, 0, sizeof(TW_Sector));
1678 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE +
1679 tw_dev->srb[request_id]->device->id;
1680 param->parameter_id = 4; /* unitcapacity parameter */
1681 param->parameter_size_bytes = 4;
1682 param_value = tw_dev->alignment_physical_address[request_id];
1683 if (param_value == 0) {
1684 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment physical address.\n");
1685 return 1;
1686 }
1687
1688 command_packet->byte8.param.sgl[0].address = param_value;
1689 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1690 command_que_value = tw_dev->command_packet_physical_address[request_id];
1691 if (command_que_value == 0) {
1692 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet physical address.\n");
1693 return 1;
1694 }
1695
1696 /* Now try to post the command to the board */
1697 tw_post_command_packet(tw_dev, request_id);
1698
1699 return 0;
1700 } /* End tw_scsiop_read_capacity() */
1701
1702 /* This function is called by the isr to complete a readcapacity command */
1703 static int tw_scsiop_read_capacity_complete(TW_Device_Extension *tw_dev, int request_id)
1704 {
1705 unsigned char *param_data;
1706 u32 capacity;
1707 char *buff;
1708 TW_Param *param;
1709
1710 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete()\n");
1711
1712 buff = tw_dev->srb[request_id]->request_buffer;
1713 if (buff == NULL) {
1714 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_capacity_complete(): Request buffer NULL.\n");
1715 return 1;
1716 }
1717 memset(buff, 0, tw_dev->srb[request_id]->request_bufflen);
1718 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1719 if (param == NULL) {
1720 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_capacity_complete(): Bad alignment virtual address.\n");
1721 return 1;
1722 }
1723 param_data = &(param->data[0]);
1724
1725 capacity = (param_data[3] << 24) | (param_data[2] << 16) |
1726 (param_data[1] << 8) | param_data[0];
1727
1728 /* Subtract one sector to fix get last sector ioctl */
1729 capacity -= 1;
1730
1731 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete(): Capacity = 0x%x.\n", capacity);
1732
1733 /* Number of LBA's */
1734 buff[0] = (capacity >> 24);
1735 buff[1] = (capacity >> 16) & 0xff;
1736 buff[2] = (capacity >> 8) & 0xff;
1737 buff[3] = capacity & 0xff;
1738
1739 /* Block size in bytes (512) */
1740 buff[4] = (TW_BLOCK_SIZE >> 24);
1741 buff[5] = (TW_BLOCK_SIZE >> 16) & 0xff;
1742 buff[6] = (TW_BLOCK_SIZE >> 8) & 0xff;
1743 buff[7] = TW_BLOCK_SIZE & 0xff;
1744
1745 return 0;
1746 } /* End tw_scsiop_read_capacity_complete() */
1747
1748 /* This function handles scsi read or write commands */
1749 static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id)
1750 {
1751 TW_Command *command_packet;
1752 unsigned long command_que_value;
1753 u32 lba = 0x0, num_sectors = 0x0, buffaddr = 0x0;
1754 int i, use_sg;
1755 struct scsi_cmnd *srb;
1756 struct scatterlist *sglist;
1757
1758 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write()\n");
1759
1760 if (tw_dev->srb[request_id]->request_buffer == NULL) {
1761 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Request buffer NULL.\n");
1762 return 1;
1763 }
1764 sglist = (struct scatterlist *)tw_dev->srb[request_id]->request_buffer;
1765 srb = tw_dev->srb[request_id];
1766
1767 /* Initialize command packet */
1768 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1769 if (command_packet == NULL) {
1770 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): Bad command packet virtual address.\n");
1771 return 1;
1772 }
1773
1774 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == READ_10) {
1775 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_READ);
1776 } else {
1777 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_WRITE);
1778 }
1779
1780 command_packet->size = 3;
1781 command_packet->request_id = request_id;
1782 command_packet->unit__hostid = TW_UNITHOST_IN(0, srb->device->id);
1783 command_packet->status = 0;
1784 command_packet->flags = 0;
1785
1786 if (srb->cmnd[0] == WRITE_10) {
1787 if ((srb->cmnd[1] & 0x8) || (srb->cmnd[1] & 0x10))
1788 command_packet->flags = 1;
1789 }
1790
1791 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6) {
1792 lba = ((u32)srb->cmnd[1] << 16) | ((u32)srb->cmnd[2] << 8) | (u32)srb->cmnd[3];
1793 num_sectors = (u32)srb->cmnd[4];
1794 } else {
1795 lba = ((u32)srb->cmnd[2] << 24) | ((u32)srb->cmnd[3] << 16) | ((u32)srb->cmnd[4] << 8) | (u32)srb->cmnd[5];
1796 num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
1797 }
1798
1799 /* Update sector statistic */
1800 tw_dev->sector_count = num_sectors;
1801 if (tw_dev->sector_count > tw_dev->max_sector_count)
1802 tw_dev->max_sector_count = tw_dev->sector_count;
1803
1804 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): lba = 0x%x num_sectors = 0x%x\n", lba, num_sectors);
1805 command_packet->byte8.io.lba = lba;
1806 command_packet->byte6.block_count = num_sectors;
1807
1808 /* Do this if there are no sg list entries */
1809 if (tw_dev->srb[request_id]->use_sg == 0) {
1810 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): SG = 0\n");
1811 buffaddr = tw_map_scsi_single_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
1812 if (buffaddr == 0)
1813 return 1;
1814
1815 command_packet->byte8.io.sgl[0].address = buffaddr;
1816 command_packet->byte8.io.sgl[0].length = tw_dev->srb[request_id]->request_bufflen;
1817 command_packet->size+=2;
1818 }
1819
1820 /* Do this if we have multiple sg list entries */
1821 if (tw_dev->srb[request_id]->use_sg > 0) {
1822 use_sg = tw_map_scsi_sg_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
1823 if (use_sg == 0)
1824 return 1;
1825
1826 for (i=0;i<use_sg; i++) {
1827 command_packet->byte8.io.sgl[i].address = sg_dma_address(&sglist[i]);
1828 command_packet->byte8.io.sgl[i].length = sg_dma_len(&sglist[i]);
1829 command_packet->size+=2;
1830 }
1831 }
1832
1833 /* Update SG statistics */
1834 tw_dev->sgl_entries = tw_dev->srb[request_id]->use_sg;
1835 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
1836 tw_dev->max_sgl_entries = tw_dev->sgl_entries;
1837
1838 command_que_value = tw_dev->command_packet_physical_address[request_id];
1839 if (command_que_value == 0) {
1840 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Bad command packet physical address.\n");
1841 return 1;
1842 }
1843
1844 /* Now try to post the command to the board */
1845 tw_post_command_packet(tw_dev, request_id);
1846
1847 return 0;
1848 } /* End tw_scsiop_read_write() */
1849
1850 /* This function will handle the request sense scsi command */
1851 static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id)
1852 {
1853 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n");
1854
1855 /* For now we just zero the request buffer */
1856 memset(tw_dev->srb[request_id]->request_buffer, 0, tw_dev->srb[request_id]->request_bufflen);
1857 tw_dev->state[request_id] = TW_S_COMPLETED;
1858 tw_state_request_finish(tw_dev, request_id);
1859
1860 /* If we got a request_sense, we probably want a reset, return error */
1861 tw_dev->srb[request_id]->result = (DID_ERROR << 16);
1862 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1863
1864 return 0;
1865 } /* End tw_scsiop_request_sense() */
1866
1867 /* This function will handle synchronize cache scsi command */
1868 static int tw_scsiop_synchronize_cache(TW_Device_Extension *tw_dev, int request_id)
1869 {
1870 TW_Command *command_packet;
1871 unsigned long command_que_value;
1872
1873 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_synchronize_cache()\n");
1874
1875 /* Send firmware flush command for this unit */
1876 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1877 if (command_packet == NULL) {
1878 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet virtual address.\n");
1879 return 1;
1880 }
1881
1882 /* Setup the command packet */
1883 memset(command_packet, 0, sizeof(TW_Sector));
1884 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_FLUSH_CACHE);
1885 command_packet->size = 2;
1886 command_packet->request_id = request_id;
1887 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1888 command_packet->status = 0;
1889 command_packet->flags = 0;
1890 command_packet->byte6.parameter_count = 1;
1891 command_que_value = tw_dev->command_packet_physical_address[request_id];
1892 if (command_que_value == 0) {
1893 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet physical address.\n");
1894 return 1;
1895 }
1896
1897 /* Now try to post the command packet */
1898 tw_post_command_packet(tw_dev, request_id);
1899
1900 return 0;
1901 } /* End tw_scsiop_synchronize_cache() */
1902
1903 /* This function will handle test unit ready scsi command */
1904 static int tw_scsiop_test_unit_ready(TW_Device_Extension *tw_dev, int request_id)
1905 {
1906 TW_Param *param;
1907 TW_Command *command_packet;
1908 unsigned long command_que_value;
1909 unsigned long param_value;
1910
1911 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_test_unit_ready()\n");
1912
1913 /* Initialize command packet */
1914 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1915 if (command_packet == NULL) {
1916 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet virtual address.\n");
1917 return 1;
1918 }
1919 memset(command_packet, 0, sizeof(TW_Sector));
1920 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1921 command_packet->size = 4;
1922 command_packet->request_id = request_id;
1923 command_packet->status = 0;
1924 command_packet->flags = 0;
1925 command_packet->byte6.parameter_count = 1;
1926
1927 /* Now setup the param */
1928 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1929 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment virtual address.\n");
1930 return 1;
1931 }
1932 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1933 memset(param, 0, sizeof(TW_Sector));
1934 param->table_id = 3; /* unit summary table */
1935 param->parameter_id = 3; /* unitsstatus parameter */
1936 param->parameter_size_bytes = TW_MAX_UNITS;
1937 param_value = tw_dev->alignment_physical_address[request_id];
1938 if (param_value == 0) {
1939 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment physical address.\n");
1940 return 1;
1941 }
1942
1943 command_packet->byte8.param.sgl[0].address = param_value;
1944 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1945 command_que_value = tw_dev->command_packet_physical_address[request_id];
1946 if (command_que_value == 0) {
1947 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet physical address.\n");
1948 return 1;
1949 }
1950
1951 /* Now try to post the command packet */
1952 tw_post_command_packet(tw_dev, request_id);
1953
1954 return 0;
1955 } /* End tw_scsiop_test_unit_ready() */
1956
1957 /* This function is called by the isr to complete a testunitready command */
1958 static int tw_scsiop_test_unit_ready_complete(TW_Device_Extension *tw_dev, int request_id)
1959 {
1960 unsigned char *is_unit_present;
1961 TW_Param *param;
1962
1963 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete()\n");
1964
1965 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1966 if (param == NULL) {
1967 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete(): Bad alignment virtual address.\n");
1968 return 1;
1969 }
1970 is_unit_present = &(param->data[0]);
1971
1972 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1973 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1974 } else {
1975 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1976 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1977 return TW_ISR_DONT_RESULT;
1978 }
1979
1980 return 0;
1981 } /* End tw_scsiop_test_unit_ready_complete() */
1982
1983 /* This is the main scsi queue function to handle scsi opcodes */
1984 static int tw_scsi_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
1985 {
1986 unsigned char *command = SCpnt->cmnd;
1987 int request_id = 0;
1988 int retval = 1;
1989 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1990
1991 /* Save done function into Scsi_Cmnd struct */
1992 SCpnt->scsi_done = done;
1993
1994 /* Queue the command and get a request id */
1995 tw_state_request_start(tw_dev, &request_id);
1996
1997 /* Save the scsi command for use by the ISR */
1998 tw_dev->srb[request_id] = SCpnt;
1999
2000 /* Initialize phase to zero */
2001 SCpnt->SCp.phase = TW_PHASE_INITIAL;
2002
2003 switch (*command) {
2004 case READ_10:
2005 case READ_6:
2006 case WRITE_10:
2007 case WRITE_6:
2008 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ/WRITE.\n");
2009 retval = tw_scsiop_read_write(tw_dev, request_id);
2010 break;
2011 case TEST_UNIT_READY:
2012 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught TEST_UNIT_READY.\n");
2013 retval = tw_scsiop_test_unit_ready(tw_dev, request_id);
2014 break;
2015 case INQUIRY:
2016 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught INQUIRY.\n");
2017 retval = tw_scsiop_inquiry(tw_dev, request_id);
2018 break;
2019 case READ_CAPACITY:
2020 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ_CAPACITY.\n");
2021 retval = tw_scsiop_read_capacity(tw_dev, request_id);
2022 break;
2023 case REQUEST_SENSE:
2024 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught REQUEST_SENSE.\n");
2025 retval = tw_scsiop_request_sense(tw_dev, request_id);
2026 break;
2027 case MODE_SENSE:
2028 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught MODE_SENSE.\n");
2029 retval = tw_scsiop_mode_sense(tw_dev, request_id);
2030 break;
2031 case SYNCHRONIZE_CACHE:
2032 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught SYNCHRONIZE_CACHE.\n");
2033 retval = tw_scsiop_synchronize_cache(tw_dev, request_id);
2034 break;
2035 case TW_IOCTL:
2036 printk(KERN_WARNING "3w-xxxx: SCSI_IOCTL_SEND_COMMAND deprecated, please update your 3ware tools.\n");
2037 break;
2038 default:
2039 printk(KERN_NOTICE "3w-xxxx: scsi%d: Unknown scsi opcode: 0x%x\n", tw_dev->host->host_no, *command);
2040 tw_dev->state[request_id] = TW_S_COMPLETED;
2041 tw_state_request_finish(tw_dev, request_id);
2042 SCpnt->result = (DID_BAD_TARGET << 16);
2043 done(SCpnt);
2044 retval = 0;
2045 }
2046 if (retval) {
2047 tw_dev->state[request_id] = TW_S_COMPLETED;
2048 tw_state_request_finish(tw_dev, request_id);
2049 SCpnt->result = (DID_ERROR << 16);
2050 done(SCpnt);
2051 retval = 0;
2052 }
2053 return retval;
2054 } /* End tw_scsi_queue() */
2055
2056 /* This function is the interrupt service routine */
2057 static irqreturn_t tw_interrupt(int irq, void *dev_instance,
2058 struct pt_regs *regs)
2059 {
2060 int request_id;
2061 u32 status_reg_value;
2062 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
2063 TW_Response_Queue response_que;
2064 int error = 0, retval = 0;
2065 TW_Command *command_packet;
2066 int handled = 0;
2067
2068 /* Get the host lock for io completions */
2069 spin_lock(tw_dev->host->host_lock);
2070
2071 /* Read the registers */
2072 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2073
2074 /* Check if this is our interrupt, otherwise bail */
2075 if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
2076 goto tw_interrupt_bail;
2077
2078 handled = 1;
2079
2080 /* Check controller for errors */
2081 if (tw_check_bits(status_reg_value)) {
2082 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2083 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2084 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2085 goto tw_interrupt_bail;
2086 }
2087 }
2088
2089 /* Handle host interrupt */
2090 if (status_reg_value & TW_STATUS_HOST_INTERRUPT) {
2091 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received host interrupt.\n");
2092 TW_CLEAR_HOST_INTERRUPT(tw_dev);
2093 }
2094
2095 /* Handle attention interrupt */
2096 if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
2097 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received attention interrupt.\n");
2098 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
2099 tw_state_request_start(tw_dev, &request_id);
2100 error = tw_aen_read_queue(tw_dev, request_id);
2101 if (error) {
2102 printk(KERN_WARNING "3w-xxxx: scsi%d: Error reading aen queue.\n", tw_dev->host->host_no);
2103 tw_dev->state[request_id] = TW_S_COMPLETED;
2104 tw_state_request_finish(tw_dev, request_id);
2105 }
2106 }
2107
2108 /* Handle command interrupt */
2109 if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
2110 /* Drain as many pending commands as we can */
2111 while (tw_dev->pending_request_count > 0) {
2112 request_id = tw_dev->pending_queue[tw_dev->pending_head];
2113 if (tw_dev->state[request_id] != TW_S_PENDING) {
2114 printk(KERN_WARNING "3w-xxxx: scsi%d: Found request id that wasn't pending.\n", tw_dev->host->host_no);
2115 break;
2116 }
2117 if (tw_post_command_packet(tw_dev, request_id)==0) {
2118 if (tw_dev->pending_head == TW_Q_LENGTH-1) {
2119 tw_dev->pending_head = TW_Q_START;
2120 } else {
2121 tw_dev->pending_head = tw_dev->pending_head + 1;
2122 }
2123 tw_dev->pending_request_count--;
2124 } else {
2125 /* If we get here, we will continue re-posting on the next command interrupt */
2126 break;
2127 }
2128 }
2129 /* If there are no more pending requests, we mask command interrupt */
2130 if (tw_dev->pending_request_count == 0)
2131 TW_MASK_COMMAND_INTERRUPT(tw_dev);
2132 }
2133
2134 /* Handle response interrupt */
2135 if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
2136 /* Drain the response queue from the board */
2137 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
2138 /* Read response queue register */
2139 response_que.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
2140 request_id = TW_RESID_OUT(response_que.response_id);
2141 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
2142 error = 0;
2143
2144 /* Check for bad response */
2145 if (command_packet->status != 0) {
2146 /* If internal command, don't error, don't fill sense */
2147 if (tw_dev->srb[request_id] == NULL) {
2148 tw_decode_sense(tw_dev, request_id, 0);
2149 } else {
2150 error = tw_decode_sense(tw_dev, request_id, 1);
2151 }
2152 }
2153
2154 /* Check for correct state */
2155 if (tw_dev->state[request_id] != TW_S_POSTED) {
2156 if (tw_dev->srb[request_id] != NULL) {
2157 printk(KERN_WARNING "3w-xxxx: scsi%d: Received a request id that wasn't posted.\n", tw_dev->host->host_no);
2158 error = 1;
2159 }
2160 }
2161
2162 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Response queue request id: %d.\n", request_id);
2163
2164 /* Check for internal command completion */
2165 if (tw_dev->srb[request_id] == NULL) {
2166 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Found internally posted command.\n");
2167 /* Check for chrdev ioctl completion */
2168 if (request_id != tw_dev->chrdev_request_id) {
2169 retval = tw_aen_complete(tw_dev, request_id);
2170 if (retval) {
2171 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing aen.\n", tw_dev->host->host_no);
2172 }
2173 } else {
2174 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
2175 wake_up(&tw_dev->ioctl_wqueue);
2176 }
2177 } else {
2178 switch (tw_dev->srb[request_id]->cmnd[0]) {
2179 case READ_10:
2180 case READ_6:
2181 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_10/READ_6\n");
2182 break;
2183 case WRITE_10:
2184 case WRITE_6:
2185 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught WRITE_10/WRITE_6\n");
2186 break;
2187 case TEST_UNIT_READY:
2188 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught TEST_UNIT_READY\n");
2189 error = tw_scsiop_test_unit_ready_complete(tw_dev, request_id);
2190 break;
2191 case INQUIRY:
2192 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught INQUIRY\n");
2193 error = tw_scsiop_inquiry_complete(tw_dev, request_id);
2194 break;
2195 case READ_CAPACITY:
2196 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_CAPACITY\n");
2197 error = tw_scsiop_read_capacity_complete(tw_dev, request_id);
2198 break;
2199 case MODE_SENSE:
2200 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught MODE_SENSE\n");
2201 error = tw_scsiop_mode_sense_complete(tw_dev, request_id);
2202 break;
2203 case SYNCHRONIZE_CACHE:
2204 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught SYNCHRONIZE_CACHE\n");
2205 break;
2206 default:
2207 printk(KERN_WARNING "3w-xxxx: case slip in tw_interrupt()\n");
2208 error = 1;
2209 }
2210
2211 /* If no error command was a success */
2212 if (error == 0) {
2213 tw_dev->srb[request_id]->result = (DID_OK << 16);
2214 }
2215
2216 /* If error, command failed */
2217 if (error == 1) {
2218 /* Ask for a host reset */
2219 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
2220 }
2221
2222 /* Now complete the io */
2223 if ((error != TW_ISR_DONT_COMPLETE)) {
2224 tw_dev->state[request_id] = TW_S_COMPLETED;
2225 tw_state_request_finish(tw_dev, request_id);
2226 tw_dev->posted_request_count--;
2227 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
2228
2229 tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
2230 }
2231 }
2232
2233 /* Check for valid status after each drain */
2234 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2235 if (tw_check_bits(status_reg_value)) {
2236 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2237 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2238 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2239 goto tw_interrupt_bail;
2240 }
2241 }
2242 }
2243 }
2244
2245 tw_interrupt_bail:
2246 spin_unlock(tw_dev->host->host_lock);
2247 return IRQ_RETVAL(handled);
2248 } /* End tw_interrupt() */
2249
2250 /* This function tells the controller to shut down */
2251 static void __tw_shutdown(TW_Device_Extension *tw_dev)
2252 {
2253 /* Disable interrupts */
2254 TW_DISABLE_INTERRUPTS(tw_dev);
2255
2256 printk(KERN_WARNING "3w-xxxx: Shutting down host %d.\n", tw_dev->host->host_no);
2257
2258 /* Tell the card we are shutting down */
2259 if (tw_initconnection(tw_dev, 1)) {
2260 printk(KERN_WARNING "3w-xxxx: Connection shutdown failed.\n");
2261 } else {
2262 printk(KERN_WARNING "3w-xxxx: Shutdown complete.\n");
2263 }
2264
2265 /* Clear all interrupts just before exit */
2266 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2267 } /* End __tw_shutdown() */
2268
2269 /* Wrapper for __tw_shutdown */
2270 static void tw_shutdown(struct device *dev)
2271 {
2272 struct Scsi_Host *host = pci_get_drvdata(to_pci_dev(dev));
2273 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2274
2275 __tw_shutdown(tw_dev);
2276 } /* End tw_shutdown() */
2277
2278 static struct scsi_host_template driver_template = {
2279 .module = THIS_MODULE,
2280 .name = "3ware Storage Controller",
2281 .queuecommand = tw_scsi_queue,
2282 .eh_host_reset_handler = tw_scsi_eh_reset,
2283 .bios_param = tw_scsi_biosparam,
2284 .change_queue_depth = tw_change_queue_depth,
2285 .can_queue = TW_Q_LENGTH-2,
2286 .this_id = -1,
2287 .sg_tablesize = TW_MAX_SGL_LENGTH,
2288 .max_sectors = TW_MAX_SECTORS,
2289 .cmd_per_lun = TW_MAX_CMDS_PER_LUN,
2290 .use_clustering = ENABLE_CLUSTERING,
2291 .shost_attrs = tw_host_attrs,
2292 .emulated = 1
2293 };
2294
2295 /* This function will probe and initialize a card */
2296 static int __devinit tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
2297 {
2298 struct Scsi_Host *host = NULL;
2299 TW_Device_Extension *tw_dev;
2300 int retval = -ENODEV;
2301
2302 retval = pci_enable_device(pdev);
2303 if (retval) {
2304 printk(KERN_WARNING "3w-xxxx: Failed to enable pci device.");
2305 goto out_disable_device;
2306 }
2307
2308 pci_set_master(pdev);
2309
2310 retval = pci_set_dma_mask(pdev, TW_DMA_MASK);
2311 if (retval) {
2312 printk(KERN_WARNING "3w-xxxx: Failed to set dma mask.");
2313 goto out_disable_device;
2314 }
2315
2316 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2317 if (!host) {
2318 printk(KERN_WARNING "3w-xxxx: Failed to allocate memory for device extension.");
2319 retval = -ENOMEM;
2320 goto out_disable_device;
2321 }
2322 tw_dev = (TW_Device_Extension *)host->hostdata;
2323
2324 memset(tw_dev, 0, sizeof(TW_Device_Extension));
2325
2326 /* Save values to device extension */
2327 tw_dev->host = host;
2328 tw_dev->tw_pci_dev = pdev;
2329
2330 if (tw_initialize_device_extension(tw_dev)) {
2331 printk(KERN_WARNING "3w-xxxx: Failed to initialize device extension.");
2332 goto out_free_device_extension;
2333 }
2334
2335 /* Request IO regions */
2336 retval = pci_request_regions(pdev, "3w-xxxx");
2337 if (retval) {
2338 printk(KERN_WARNING "3w-xxxx: Failed to get mem region.");
2339 goto out_free_device_extension;
2340 }
2341
2342 /* Save base address */
2343 tw_dev->base_addr = pci_resource_start(pdev, 0);
2344 if (!tw_dev->base_addr) {
2345 printk(KERN_WARNING "3w-xxxx: Failed to get io address.");
2346 goto out_release_mem_region;
2347 }
2348
2349 /* Disable interrupts on the card */
2350 TW_DISABLE_INTERRUPTS(tw_dev);
2351
2352 /* Initialize the card */
2353 if (tw_reset_sequence(tw_dev))
2354 goto out_release_mem_region;
2355
2356 /* Set host specific parameters */
2357 host->max_id = TW_MAX_UNITS;
2358 host->max_cmd_len = TW_MAX_CDB_LEN;
2359
2360 /* Luns and channels aren't supported by adapter */
2361 host->max_lun = 0;
2362 host->max_channel = 0;
2363
2364 /* Register the card with the kernel SCSI layer */
2365 retval = scsi_add_host(host, &pdev->dev);
2366 if (retval) {
2367 printk(KERN_WARNING "3w-xxxx: scsi add host failed");
2368 goto out_release_mem_region;
2369 }
2370
2371 pci_set_drvdata(pdev, host);
2372
2373 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);
2374
2375 /* Now setup the interrupt handler */
2376 retval = request_irq(pdev->irq, tw_interrupt, SA_SHIRQ, "3w-xxxx", tw_dev);
2377 if (retval) {
2378 printk(KERN_WARNING "3w-xxxx: Error requesting IRQ.");
2379 goto out_remove_host;
2380 }
2381
2382 tw_device_extension_list[tw_device_extension_count] = tw_dev;
2383 tw_device_extension_count++;
2384
2385 /* Re-enable interrupts on the card */
2386 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2387
2388 /* Finally, scan the host */
2389 scsi_scan_host(host);
2390
2391 if (twe_major == -1) {
2392 if ((twe_major = register_chrdev (0, "twe", &tw_fops)) < 0)
2393 printk(KERN_WARNING "3w-xxxx: Failed to register character device.");
2394 }
2395 return 0;
2396
2397 out_remove_host:
2398 scsi_remove_host(host);
2399 out_release_mem_region:
2400 pci_release_regions(pdev);
2401 out_free_device_extension:
2402 tw_free_device_extension(tw_dev);
2403 scsi_host_put(host);
2404 out_disable_device:
2405 pci_disable_device(pdev);
2406
2407 return retval;
2408 } /* End tw_probe() */
2409
2410 /* This function is called to remove a device */
2411 static void tw_remove(struct pci_dev *pdev)
2412 {
2413 struct Scsi_Host *host = pci_get_drvdata(pdev);
2414 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2415
2416 scsi_remove_host(tw_dev->host);
2417
2418 /* Unregister character device */
2419 if (twe_major >= 0) {
2420 unregister_chrdev(twe_major, "twe");
2421 twe_major = -1;
2422 }
2423
2424 /* Free up the IRQ */
2425 free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
2426
2427 /* Shutdown the card */
2428 __tw_shutdown(tw_dev);
2429
2430 /* Free up the mem region */
2431 pci_release_regions(pdev);
2432
2433 /* Free up device extension resources */
2434 tw_free_device_extension(tw_dev);
2435
2436 scsi_host_put(tw_dev->host);
2437 pci_disable_device(pdev);
2438 tw_device_extension_count--;
2439 } /* End tw_remove() */
2440
2441 /* PCI Devices supported by this driver */
2442 static struct pci_device_id tw_pci_tbl[] __devinitdata = {
2443 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_1000,
2444 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2445 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_7000,
2446 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2447 { }
2448 };
2449 MODULE_DEVICE_TABLE(pci, tw_pci_tbl);
2450
2451 /* pci_driver initializer */
2452 static struct pci_driver tw_driver = {
2453 .name = "3w-xxxx",
2454 .id_table = tw_pci_tbl,
2455 .probe = tw_probe,
2456 .remove = tw_remove,
2457 .driver = {
2458 .shutdown = tw_shutdown
2459 }
2460 };
2461
2462 /* This function is called on driver initialization */
2463 static int __init tw_init(void)
2464 {
2465 printk(KERN_WARNING "3ware Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2466
2467 return pci_module_init(&tw_driver);
2468 } /* End tw_init() */
2469
2470 /* This function is called on driver exit */
2471 static void __exit tw_exit(void)
2472 {
2473 pci_unregister_driver(&tw_driver);
2474 } /* End tw_exit() */
2475
2476 module_init(tw_init);
2477 module_exit(tw_exit);
2478
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