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[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / 3w-xxxx.c
blobc7995fc216e8ed43a572ea9e41f482fc7c6a88c8
1 /*
2 3w-xxxx.c -- 3ware Storage Controller device driver for Linux.
3
4 Written By: Adam Radford <linuxraid@amcc.com>
5 Modifications By: Joel Jacobson <linux@3ware.com>
6 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
7 Brad Strand <linux@3ware.com>
8
9 Copyright (C) 1999-2007 3ware Inc.
10
11 Kernel compatiblity By: Andre Hedrick <andre@suse.com>
12 Non-Copyright (C) 2000 Andre Hedrick <andre@suse.com>
13
14 Further tiny build fixes and trivial hoovering Alan Cox
15
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; version 2 of the License.
19
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
24
25 NO WARRANTY
26 THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
27 CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
28 LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
29 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
30 solely responsible for determining the appropriateness of using and
31 distributing the Program and assumes all risks associated with its
32 exercise of rights under this Agreement, including but not limited to
33 the risks and costs of program errors, damage to or loss of data,
34 programs or equipment, and unavailability or interruption of operations.
35
36 DISCLAIMER OF LIABILITY
37 NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
38 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39 DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
40 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
41 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
42 USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
43 HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
44
45 You should have received a copy of the GNU General Public License
46 along with this program; if not, write to the Free Software
47 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
48
49 Bugs/Comments/Suggestions should be mailed to:
50 linuxraid@amcc.com
51
52 For more information, goto:
53 http://www.amcc.com
54
55 History
56 -------
57 0.1.000 - Initial release.
58 0.4.000 - Added support for Asynchronous Event Notification through
59 ioctls for 3DM.
60 1.0.000 - Added DPO & FUA bit support for WRITE_10 & WRITE_6 cdb
61 to disable drive write-cache before writes.
62 1.1.000 - Fixed performance bug with DPO & FUA not existing for WRITE_6.
63 1.2.000 - Added support for clean shutdown notification/feature table.
64 1.02.00.001 - Added support for full command packet posts through ioctls
65 for 3DM.
66 Bug fix so hot spare drives don't show up.
67 1.02.00.002 - Fix bug with tw_setfeature() call that caused oops on some
68 systems.
69 08/21/00 - release previously allocated resources on failure at
70 tw_allocate_memory (acme)
71 1.02.00.003 - Fix tw_interrupt() to report error to scsi layer when
72 controller status is non-zero.
73 Added handling of request_sense opcode.
74 Fix possible null pointer dereference in
75 tw_reset_device_extension()
76 1.02.00.004 - Add support for device id of 3ware 7000 series controllers.
77 Make tw_setfeature() call with interrupts disabled.
78 Register interrupt handler before enabling interrupts.
79 Clear attention interrupt before draining aen queue.
80 1.02.00.005 - Allocate bounce buffers and custom queue depth for raid5 for
81 6000 and 5000 series controllers.
82 Reduce polling mdelays causing problems on some systems.
83 Fix use_sg = 1 calculation bug.
84 Check for scsi_register returning NULL.
85 Add aen count to /proc/scsi/3w-xxxx.
86 Remove aen code unit masking in tw_aen_complete().
87 1.02.00.006 - Remove unit from printk in tw_scsi_eh_abort(), causing
88 possible oops.
89 Fix possible null pointer dereference in tw_scsi_queue()
90 if done function pointer was invalid.
91 1.02.00.007 - Fix possible null pointer dereferences in tw_ioctl().
92 Remove check for invalid done function pointer from
93 tw_scsi_queue().
94 1.02.00.008 - Set max sectors per io to TW_MAX_SECTORS in tw_findcards().
95 Add tw_decode_error() for printing readable error messages.
96 Print some useful information on certain aen codes.
97 Add tw_decode_bits() for interpreting status register output.
98 Make scsi_set_pci_device() for kernels >= 2.4.4
99 Fix bug where aen's could be lost before a reset.
100 Re-add spinlocks in tw_scsi_detect().
101 Fix possible null pointer dereference in tw_aen_drain_queue()
102 during initialization.
103 Clear pci parity errors during initialization and during io.
104 1.02.00.009 - Remove redundant increment in tw_state_request_start().
105 Add ioctl support for direct ATA command passthru.
106 Add entire aen code string list.
107 1.02.00.010 - Cleanup queueing code, fix jbod thoughput.
108 Fix get_param for specific units.
109 1.02.00.011 - Fix bug in tw_aen_complete() where aen's could be lost.
110 Fix tw_aen_drain_queue() to display useful info at init.
111 Set tw_host->max_id for 12 port cards.
112 Add ioctl support for raw command packet post from userspace
113 with sglist fragments (parameter and io).
114 1.02.00.012 - Fix read capacity to under report by 1 sector to fix get
115 last sector ioctl.
116 1.02.00.013 - Fix bug where more AEN codes weren't coming out during
117 driver initialization.
118 Improved handling of PCI aborts.
119 1.02.00.014 - Fix bug in tw_findcards() where AEN code could be lost.
120 Increase timeout in tw_aen_drain_queue() to 30 seconds.
121 1.02.00.015 - Re-write raw command post with data ioctl method.
122 Remove raid5 bounce buffers for raid5 for 6XXX for kernel 2.5
123 Add tw_map/unmap_scsi_sg/single_data() for kernel 2.5
124 Replace io_request_lock with host_lock for kernel 2.5
125 Set max_cmd_len to 16 for 3dm for kernel 2.5
126 1.02.00.016 - Set host->max_sectors back up to 256.
127 1.02.00.017 - Modified pci parity error handling/clearing from config space
128 during initialization.
129 1.02.00.018 - Better handling of request sense opcode and sense information
130 for failed commands. Add tw_decode_sense().
131 Replace all mdelay()'s with scsi_sleep().
132 1.02.00.019 - Revert mdelay's and scsi_sleep's, this caused problems on
133 some SMP systems.
134 1.02.00.020 - Add pci_set_dma_mask(), rewrite kmalloc()/virt_to_bus() to
135 pci_alloc/free_consistent().
136 Better alignment checking in tw_allocate_memory().
137 Cleanup tw_initialize_device_extension().
138 1.02.00.021 - Bump cmd_per_lun in SHT to 255 for better jbod performance.
139 Improve handling of errors in tw_interrupt().
140 Add handling/clearing of controller queue error.
141 Empty stale responses before draining aen queue.
142 Fix tw_scsi_eh_abort() to not reset on every io abort.
143 Set can_queue in SHT to 255 to prevent hang from AEN.
144 1.02.00.022 - Fix possible null pointer dereference in tw_scsi_release().
145 1.02.00.023 - Fix bug in tw_aen_drain_queue() where unit # was always zero.
146 1.02.00.024 - Add severity levels to AEN strings.
147 1.02.00.025 - Fix command interrupt spurious error messages.
148 Fix bug in raw command post with data ioctl method.
149 Fix bug where rollcall sometimes failed with cable errors.
150 Print unit # on all command timeouts.
151 1.02.00.026 - Fix possible infinite retry bug with power glitch induced
152 drive timeouts.
153 Cleanup some AEN severity levels.
154 1.02.00.027 - Add drive not supported AEN code for SATA controllers.
155 Remove spurious unknown ioctl error message.
156 1.02.00.028 - Fix bug where multiple controllers with no units were the
157 same card number.
158 Fix bug where cards were being shut down more than once.
159 1.02.00.029 - Add missing pci_free_consistent() in tw_allocate_memory().
160 Replace pci_map_single() with pci_map_page() for highmem.
161 Check for tw_setfeature() failure.
162 1.02.00.030 - Make driver 64-bit clean.
163 1.02.00.031 - Cleanup polling timeouts/routines in several places.
164 Add support for mode sense opcode.
165 Add support for cache mode page.
166 Add support for synchronize cache opcode.
167 1.02.00.032 - Fix small multicard rollcall bug.
168 Make driver stay loaded with no units for hot add/swap.
169 Add support for "twe" character device for ioctls.
170 Clean up request_id queueing code.
171 Fix tw_scsi_queue() spinlocks.
172 1.02.00.033 - Fix tw_aen_complete() to not queue 'queue empty' AEN's.
173 Initialize queues correctly when loading with no valid units.
174 1.02.00.034 - Fix tw_decode_bits() to handle multiple errors.
175 Add support for user configurable cmd_per_lun.
176 Add support for sht->slave_configure().
177 1.02.00.035 - Improve tw_allocate_memory() memory allocation.
178 Fix tw_chrdev_ioctl() to sleep correctly.
179 1.02.00.036 - Increase character ioctl timeout to 60 seconds.
180 1.02.00.037 - Fix tw_ioctl() to handle all non-data ATA passthru cmds
181 for 'smartmontools' support.
182 1.26.00.038 - Roll driver minor version to 26 to denote kernel 2.6.
183 Add support for cmds_per_lun module parameter.
184 1.26.00.039 - Fix bug in tw_chrdev_ioctl() polling code.
185 Fix data_buffer_length usage in tw_chrdev_ioctl().
186 Update contact information.
187 1.26.02.000 - Convert driver to pci_driver format.
188 1.26.02.001 - Increase max ioctl buffer size to 512 sectors.
189 Make tw_scsi_queue() return 0 for 'Unknown scsi opcode'.
190 Fix tw_remove() to free irq handler/unregister_chrdev()
191 before shutting down card.
192 Change to new 'change_queue_depth' api.
193 Fix 'handled=1' ISR usage, remove bogus IRQ check.
194 1.26.02.002 - Free irq handler in __tw_shutdown().
195 Turn on RCD bit for caching mode page.
196 Serialize reset code.
197 */
198
199 #include <linux/module.h>
200 #include <linux/reboot.h>
201 #include <linux/spinlock.h>
202 #include <linux/interrupt.h>
203 #include <linux/moduleparam.h>
204 #include <linux/errno.h>
205 #include <linux/types.h>
206 #include <linux/delay.h>
207 #include <linux/pci.h>
208 #include <linux/time.h>
209 #include <linux/mutex.h>
210 #include <asm/io.h>
211 #include <asm/irq.h>
212 #include <asm/uaccess.h>
213 #include <scsi/scsi.h>
214 #include <scsi/scsi_host.h>
215 #include <scsi/scsi_tcq.h>
216 #include <scsi/scsi_cmnd.h>
217 #include "3w-xxxx.h"
218
219 /* Globals */
220 #define TW_DRIVER_VERSION "1.26.02.002"
221 static TW_Device_Extension *tw_device_extension_list[TW_MAX_SLOT];
222 static int tw_device_extension_count = 0;
223 static int twe_major = -1;
224
225 /* Module parameters */
226 MODULE_AUTHOR("AMCC");
227 MODULE_DESCRIPTION("3ware Storage Controller Linux Driver");
228 MODULE_LICENSE("GPL");
229 MODULE_VERSION(TW_DRIVER_VERSION);
230
231 /* Function prototypes */
232 static int tw_reset_device_extension(TW_Device_Extension *tw_dev);
233
234 /* Functions */
235
236 /* This function will check the status register for unexpected bits */
237 static int tw_check_bits(u32 status_reg_value)
238 {
239 if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS) {
240 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): No expected bits (0x%x).\n", status_reg_value);
241 return 1;
242 }
243 if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0) {
244 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): Found unexpected bits (0x%x).\n", status_reg_value);
245 return 1;
246 }
247
248 return 0;
249 } /* End tw_check_bits() */
250
251 /* This function will print readable messages from status register errors */
252 static int tw_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value, int print_host)
253 {
254 char host[16];
255
256 dprintk(KERN_WARNING "3w-xxxx: tw_decode_bits()\n");
257
258 if (print_host)
259 sprintf(host, " scsi%d:", tw_dev->host->host_no);
260 else
261 host[0] = '\0';
262
263 if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) {
264 printk(KERN_WARNING "3w-xxxx:%s PCI Parity Error: clearing.\n", host);
265 outl(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
266 }
267
268 if (status_reg_value & TW_STATUS_PCI_ABORT) {
269 printk(KERN_WARNING "3w-xxxx:%s PCI Abort: clearing.\n", host);
270 outl(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev));
271 pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT);
272 }
273
274 if (status_reg_value & TW_STATUS_QUEUE_ERROR) {
275 printk(KERN_WARNING "3w-xxxx:%s Controller Queue Error: clearing.\n", host);
276 outl(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
277 }
278
279 if (status_reg_value & TW_STATUS_SBUF_WRITE_ERROR) {
280 printk(KERN_WARNING "3w-xxxx:%s SBUF Write Error: clearing.\n", host);
281 outl(TW_CONTROL_CLEAR_SBUF_WRITE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
282 }
283
284 if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
285 if (tw_dev->reset_print == 0) {
286 printk(KERN_WARNING "3w-xxxx:%s Microcontroller Error: clearing.\n", host);
287 tw_dev->reset_print = 1;
288 }
289 return 1;
290 }
291
292 return 0;
293 } /* End tw_decode_bits() */
294
295 /* This function will poll the status register for a flag */
296 static int tw_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds)
297 {
298 u32 status_reg_value;
299 unsigned long before;
300 int retval = 1;
301
302 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
303 before = jiffies;
304
305 if (tw_check_bits(status_reg_value))
306 tw_decode_bits(tw_dev, status_reg_value, 0);
307
308 while ((status_reg_value & flag) != flag) {
309 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
310
311 if (tw_check_bits(status_reg_value))
312 tw_decode_bits(tw_dev, status_reg_value, 0);
313
314 if (time_after(jiffies, before + HZ * seconds))
315 goto out;
316
317 msleep(50);
318 }
319 retval = 0;
320 out:
321 return retval;
322 } /* End tw_poll_status() */
323
324 /* This function will poll the status register for disappearance of a flag */
325 static int tw_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds)
326 {
327 u32 status_reg_value;
328 unsigned long before;
329 int retval = 1;
330
331 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
332 before = jiffies;
333
334 if (tw_check_bits(status_reg_value))
335 tw_decode_bits(tw_dev, status_reg_value, 0);
336
337 while ((status_reg_value & flag) != 0) {
338 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
339
340 if (tw_check_bits(status_reg_value))
341 tw_decode_bits(tw_dev, status_reg_value, 0);
342
343 if (time_after(jiffies, before + HZ * seconds))
344 goto out;
345
346 msleep(50);
347 }
348 retval = 0;
349 out:
350 return retval;
351 } /* End tw_poll_status_gone() */
352
353 /* This function will attempt to post a command packet to the board */
354 static int tw_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
355 {
356 u32 status_reg_value;
357 unsigned long command_que_value;
358
359 dprintk(KERN_NOTICE "3w-xxxx: tw_post_command_packet()\n");
360 command_que_value = tw_dev->command_packet_physical_address[request_id];
361 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
362
363 if (tw_check_bits(status_reg_value)) {
364 dprintk(KERN_WARNING "3w-xxxx: tw_post_command_packet(): Unexpected bits.\n");
365 tw_decode_bits(tw_dev, status_reg_value, 1);
366 }
367
368 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
369 /* We successfully posted the command packet */
370 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
371 tw_dev->state[request_id] = TW_S_POSTED;
372 tw_dev->posted_request_count++;
373 if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) {
374 tw_dev->max_posted_request_count = tw_dev->posted_request_count;
375 }
376 } else {
377 /* Couldn't post the command packet, so we do it in the isr */
378 if (tw_dev->state[request_id] != TW_S_PENDING) {
379 tw_dev->state[request_id] = TW_S_PENDING;
380 tw_dev->pending_request_count++;
381 if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) {
382 tw_dev->max_pending_request_count = tw_dev->pending_request_count;
383 }
384 tw_dev->pending_queue[tw_dev->pending_tail] = request_id;
385 if (tw_dev->pending_tail == TW_Q_LENGTH-1) {
386 tw_dev->pending_tail = TW_Q_START;
387 } else {
388 tw_dev->pending_tail = tw_dev->pending_tail + 1;
389 }
390 }
391 TW_UNMASK_COMMAND_INTERRUPT(tw_dev);
392 return 1;
393 }
394 return 0;
395 } /* End tw_post_command_packet() */
396
397 /* This function will return valid sense buffer information for failed cmds */
398 static int tw_decode_sense(TW_Device_Extension *tw_dev, int request_id, int fill_sense)
399 {
400 int i;
401 TW_Command *command;
402
403 dprintk(KERN_WARNING "3w-xxxx: tw_decode_sense()\n");
404 command = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
405
406 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));
407
408 /* Attempt to return intelligent sense information */
409 if (fill_sense) {
410 if ((command->status == 0xc7) || (command->status == 0xcb)) {
411 for (i = 0; i < ARRAY_SIZE(tw_sense_table); i++) {
412 if (command->flags == tw_sense_table[i][0]) {
413
414 /* Valid bit and 'current errors' */
415 tw_dev->srb[request_id]->sense_buffer[0] = (0x1 << 7 | 0x70);
416
417 /* Sense key */
418 tw_dev->srb[request_id]->sense_buffer[2] = tw_sense_table[i][1];
419
420 /* Additional sense length */
421 tw_dev->srb[request_id]->sense_buffer[7] = 0xa; /* 10 bytes */
422
423 /* Additional sense code */
424 tw_dev->srb[request_id]->sense_buffer[12] = tw_sense_table[i][2];
425
426 /* Additional sense code qualifier */
427 tw_dev->srb[request_id]->sense_buffer[13] = tw_sense_table[i][3];
428
429 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
430 return TW_ISR_DONT_RESULT; /* Special case for isr to not over-write result */
431 }
432 }
433 }
434
435 /* If no table match, error so we get a reset */
436 return 1;
437 }
438
439 return 0;
440 } /* End tw_decode_sense() */
441
442 /* This function will report controller error status */
443 static int tw_check_errors(TW_Device_Extension *tw_dev)
444 {
445 u32 status_reg_value;
446
447 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
448
449 if (TW_STATUS_ERRORS(status_reg_value) || tw_check_bits(status_reg_value)) {
450 tw_decode_bits(tw_dev, status_reg_value, 0);
451 return 1;
452 }
453
454 return 0;
455 } /* End tw_check_errors() */
456
457 /* This function will empty the response que */
458 static void tw_empty_response_que(TW_Device_Extension *tw_dev)
459 {
460 u32 status_reg_value, response_que_value;
461
462 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
463
464 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
465 response_que_value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
466 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
467 }
468 } /* End tw_empty_response_que() */
469
470 /* This function will free a request_id */
471 static void tw_state_request_finish(TW_Device_Extension *tw_dev, int request_id)
472 {
473 tw_dev->free_queue[tw_dev->free_tail] = request_id;
474 tw_dev->state[request_id] = TW_S_FINISHED;
475 tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
476 } /* End tw_state_request_finish() */
477
478 /* This function will assign an available request_id */
479 static void tw_state_request_start(TW_Device_Extension *tw_dev, int *request_id)
480 {
481 *request_id = tw_dev->free_queue[tw_dev->free_head];
482 tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
483 tw_dev->state[*request_id] = TW_S_STARTED;
484 } /* End tw_state_request_start() */
485
486 /* Show some statistics about the card */
487 static ssize_t tw_show_stats(struct class_device *class_dev, char *buf)
488 {
489 struct Scsi_Host *host = class_to_shost(class_dev);
490 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
491 unsigned long flags = 0;
492 ssize_t len;
493
494 spin_lock_irqsave(tw_dev->host->host_lock, flags);
495 len = snprintf(buf, PAGE_SIZE, "3w-xxxx Driver version: %s\n"
496 "Current commands posted: %4d\n"
497 "Max commands posted: %4d\n"
498 "Current pending commands: %4d\n"
499 "Max pending commands: %4d\n"
500 "Last sgl length: %4d\n"
501 "Max sgl length: %4d\n"
502 "Last sector count: %4d\n"
503 "Max sector count: %4d\n"
504 "SCSI Host Resets: %4d\n"
505 "AEN's: %4d\n",
506 TW_DRIVER_VERSION,
507 tw_dev->posted_request_count,
508 tw_dev->max_posted_request_count,
509 tw_dev->pending_request_count,
510 tw_dev->max_pending_request_count,
511 tw_dev->sgl_entries,
512 tw_dev->max_sgl_entries,
513 tw_dev->sector_count,
514 tw_dev->max_sector_count,
515 tw_dev->num_resets,
516 tw_dev->aen_count);
517 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
518 return len;
519 } /* End tw_show_stats() */
520
521 /* This function will set a devices queue depth */
522 static int tw_change_queue_depth(struct scsi_device *sdev, int queue_depth)
523 {
524 if (queue_depth > TW_Q_LENGTH-2)
525 queue_depth = TW_Q_LENGTH-2;
526 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
527 return queue_depth;
528 } /* End tw_change_queue_depth() */
529
530 /* Create sysfs 'stats' entry */
531 static struct class_device_attribute tw_host_stats_attr = {
532 .attr = {
533 .name = "stats",
534 .mode = S_IRUGO,
535 },
536 .show = tw_show_stats
537 };
538
539 /* Host attributes initializer */
540 static struct class_device_attribute *tw_host_attrs[] = {
541 &tw_host_stats_attr,
542 NULL,
543 };
544
545 /* This function will read the aen queue from the isr */
546 static int tw_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
547 {
548 TW_Command *command_packet;
549 TW_Param *param;
550 unsigned long command_que_value;
551 u32 status_reg_value;
552 unsigned long param_value = 0;
553
554 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_read_queue()\n");
555
556 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
557 if (tw_check_bits(status_reg_value)) {
558 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Unexpected bits.\n");
559 tw_decode_bits(tw_dev, status_reg_value, 1);
560 return 1;
561 }
562 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
563 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet virtual address.\n");
564 return 1;
565 }
566 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
567 memset(command_packet, 0, sizeof(TW_Sector));
568 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
569 command_packet->size = 4;
570 command_packet->request_id = request_id;
571 command_packet->status = 0;
572 command_packet->flags = 0;
573 command_packet->byte6.parameter_count = 1;
574 command_que_value = tw_dev->command_packet_physical_address[request_id];
575 if (command_que_value == 0) {
576 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet physical address.\n");
577 return 1;
578 }
579 /* Now setup the param */
580 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
581 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment virtual address.\n");
582 return 1;
583 }
584 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
585 memset(param, 0, sizeof(TW_Sector));
586 param->table_id = 0x401; /* AEN table */
587 param->parameter_id = 2; /* Unit code */
588 param->parameter_size_bytes = 2;
589 param_value = tw_dev->alignment_physical_address[request_id];
590 if (param_value == 0) {
591 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment physical address.\n");
592 return 1;
593 }
594 command_packet->byte8.param.sgl[0].address = param_value;
595 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
596
597 /* Now post the command packet */
598 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
599 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post succeeded.\n");
600 tw_dev->srb[request_id] = NULL; /* Flag internal command */
601 tw_dev->state[request_id] = TW_S_POSTED;
602 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
603 } else {
604 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post failed, will retry.\n");
605 return 1;
606 }
607
608 return 0;
609 } /* End tw_aen_read_queue() */
610
611 /* This function will complete an aen request from the isr */
612 static int tw_aen_complete(TW_Device_Extension *tw_dev, int request_id)
613 {
614 TW_Param *param;
615 unsigned short aen;
616 int error = 0, table_max = 0;
617
618 dprintk(KERN_WARNING "3w-xxxx: tw_aen_complete()\n");
619 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
620 printk(KERN_WARNING "3w-xxxx: tw_aen_complete(): Bad alignment virtual address.\n");
621 return 1;
622 }
623 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
624 aen = *(unsigned short *)(param->data);
625 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_complete(): Queue'd code 0x%x\n", aen);
626
627 /* Print some useful info when certain aen codes come out */
628 if (aen == 0x0ff) {
629 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: INFO: AEN queue overflow.\n", tw_dev->host->host_no);
630 } else {
631 table_max = ARRAY_SIZE(tw_aen_string);
632 if ((aen & 0x0ff) < table_max) {
633 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
634 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s%d.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff], aen >> 8);
635 } else {
636 if (aen != 0x0)
637 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff]);
638 }
639 } else {
640 printk(KERN_WARNING "3w-xxxx: scsi%d: Received AEN %d.\n", tw_dev->host->host_no, aen);
641 }
642 }
643 if (aen != TW_AEN_QUEUE_EMPTY) {
644 tw_dev->aen_count++;
645
646 /* Now queue the code */
647 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
648 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
649 tw_dev->aen_tail = TW_Q_START;
650 } else {
651 tw_dev->aen_tail = tw_dev->aen_tail + 1;
652 }
653 if (tw_dev->aen_head == tw_dev->aen_tail) {
654 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
655 tw_dev->aen_head = TW_Q_START;
656 } else {
657 tw_dev->aen_head = tw_dev->aen_head + 1;
658 }
659 }
660
661 error = tw_aen_read_queue(tw_dev, request_id);
662 if (error) {
663 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing AEN.\n", tw_dev->host->host_no);
664 tw_dev->state[request_id] = TW_S_COMPLETED;
665 tw_state_request_finish(tw_dev, request_id);
666 }
667 } else {
668 tw_dev->state[request_id] = TW_S_COMPLETED;
669 tw_state_request_finish(tw_dev, request_id);
670 }
671
672 return 0;
673 } /* End tw_aen_complete() */
674
675 /* This function will drain the aen queue after a soft reset */
676 static int tw_aen_drain_queue(TW_Device_Extension *tw_dev)
677 {
678 TW_Command *command_packet;
679 TW_Param *param;
680 int request_id = 0;
681 unsigned long command_que_value;
682 unsigned long param_value;
683 TW_Response_Queue response_queue;
684 unsigned short aen;
685 unsigned short aen_code;
686 int finished = 0;
687 int first_reset = 0;
688 int queue = 0;
689 int found = 0, table_max = 0;
690
691 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_drain_queue()\n");
692
693 if (tw_poll_status(tw_dev, TW_STATUS_ATTENTION_INTERRUPT | TW_STATUS_MICROCONTROLLER_READY, 30)) {
694 dprintk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): No attention interrupt for card %d.\n", tw_device_extension_count);
695 return 1;
696 }
697 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
698
699 /* Empty response queue */
700 tw_empty_response_que(tw_dev);
701
702 /* Initialize command packet */
703 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
704 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet virtual address.\n");
705 return 1;
706 }
707 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
708 memset(command_packet, 0, sizeof(TW_Sector));
709 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
710 command_packet->size = 4;
711 command_packet->request_id = request_id;
712 command_packet->status = 0;
713 command_packet->flags = 0;
714 command_packet->byte6.parameter_count = 1;
715 command_que_value = tw_dev->command_packet_physical_address[request_id];
716 if (command_que_value == 0) {
717 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet physical address.\n");
718 return 1;
719 }
720
721 /* Now setup the param */
722 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
723 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment virtual address.\n");
724 return 1;
725 }
726 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
727 memset(param, 0, sizeof(TW_Sector));
728 param->table_id = 0x401; /* AEN table */
729 param->parameter_id = 2; /* Unit code */
730 param->parameter_size_bytes = 2;
731 param_value = tw_dev->alignment_physical_address[request_id];
732 if (param_value == 0) {
733 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment physical address.\n");
734 return 1;
735 }
736 command_packet->byte8.param.sgl[0].address = param_value;
737 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
738
739 /* Now drain the controller's aen queue */
740 do {
741 /* Post command packet */
742 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
743
744 /* Now poll for completion */
745 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
746 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
747 request_id = TW_RESID_OUT(response_queue.response_id);
748
749 if (request_id != 0) {
750 /* Unexpected request id */
751 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Unexpected request id.\n");
752 return 1;
753 }
754
755 if (command_packet->status != 0) {
756 if (command_packet->flags != TW_AEN_TABLE_UNDEFINED) {
757 /* Bad response */
758 tw_decode_sense(tw_dev, request_id, 0);
759 return 1;
760 } else {
761 /* We know this is a 3w-1x00, and doesn't support aen's */
762 return 0;
763 }
764 }
765
766 /* Now check the aen */
767 aen = *(unsigned short *)(param->data);
768 aen_code = (aen & 0x0ff);
769 queue = 0;
770 switch (aen_code) {
771 case TW_AEN_QUEUE_EMPTY:
772 dprintk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
773 if (first_reset != 1) {
774 return 1;
775 } else {
776 finished = 1;
777 }
778 break;
779 case TW_AEN_SOFT_RESET:
780 if (first_reset == 0) {
781 first_reset = 1;
782 } else {
783 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
784 tw_dev->aen_count++;
785 queue = 1;
786 }
787 break;
788 default:
789 if (aen == 0x0ff) {
790 printk(KERN_WARNING "3w-xxxx: AEN: INFO: AEN queue overflow.\n");
791 } else {
792 table_max = ARRAY_SIZE(tw_aen_string);
793 if ((aen & 0x0ff) < table_max) {
794 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
795 printk(KERN_WARNING "3w-xxxx: AEN: %s%d.\n", tw_aen_string[aen & 0xff], aen >> 8);
796 } else {
797 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
798 }
799 } else
800 printk(KERN_WARNING "3w-xxxx: Received AEN %d.\n", aen);
801 }
802 tw_dev->aen_count++;
803 queue = 1;
804 }
805
806 /* Now put the aen on the aen_queue */
807 if (queue == 1) {
808 tw_dev->aen_queue[tw_dev->aen_tail] = aen;
809 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
810 tw_dev->aen_tail = TW_Q_START;
811 } else {
812 tw_dev->aen_tail = tw_dev->aen_tail + 1;
813 }
814 if (tw_dev->aen_head == tw_dev->aen_tail) {
815 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
816 tw_dev->aen_head = TW_Q_START;
817 } else {
818 tw_dev->aen_head = tw_dev->aen_head + 1;
819 }
820 }
821 }
822 found = 1;
823 }
824 if (found == 0) {
825 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Response never received.\n");
826 return 1;
827 }
828 } while (finished == 0);
829
830 return 0;
831 } /* End tw_aen_drain_queue() */
832
833 /* This function will allocate memory */
834 static int tw_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
835 {
836 int i;
837 dma_addr_t dma_handle;
838 unsigned long *cpu_addr = NULL;
839
840 dprintk(KERN_NOTICE "3w-xxxx: tw_allocate_memory()\n");
841
842 cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
843 if (cpu_addr == NULL) {
844 printk(KERN_WARNING "3w-xxxx: pci_alloc_consistent() failed.\n");
845 return 1;
846 }
847
848 if ((unsigned long)cpu_addr % (tw_dev->tw_pci_dev->device == TW_DEVICE_ID ? TW_ALIGNMENT_6000 : TW_ALIGNMENT_7000)) {
849 printk(KERN_WARNING "3w-xxxx: Couldn't allocate correctly aligned memory.\n");
850 pci_free_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, cpu_addr, dma_handle);
851 return 1;
852 }
853
854 memset(cpu_addr, 0, size*TW_Q_LENGTH);
855
856 for (i=0;i<TW_Q_LENGTH;i++) {
857 switch(which) {
858 case 0:
859 tw_dev->command_packet_physical_address[i] = dma_handle+(i*size);
860 tw_dev->command_packet_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
861 break;
862 case 1:
863 tw_dev->alignment_physical_address[i] = dma_handle+(i*size);
864 tw_dev->alignment_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
865 break;
866 default:
867 printk(KERN_WARNING "3w-xxxx: tw_allocate_memory(): case slip in tw_allocate_memory()\n");
868 return 1;
869 }
870 }
871
872 return 0;
873 } /* End tw_allocate_memory() */
874
875 /* This function handles ioctl for the character device */
876 static int tw_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
877 {
878 int request_id;
879 dma_addr_t dma_handle;
880 unsigned short tw_aen_code;
881 unsigned long flags;
882 unsigned int data_buffer_length = 0;
883 unsigned long data_buffer_length_adjusted = 0;
884 unsigned long *cpu_addr;
885 long timeout;
886 TW_New_Ioctl *tw_ioctl;
887 TW_Passthru *passthru;
888 TW_Device_Extension *tw_dev = tw_device_extension_list[iminor(inode)];
889 int retval = -EFAULT;
890 void __user *argp = (void __user *)arg;
891
892 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl()\n");
893
894 /* Only let one of these through at a time */
895 if (mutex_lock_interruptible(&tw_dev->ioctl_lock))
896 return -EINTR;
897
898 /* First copy down the buffer length */
899 if (copy_from_user(&data_buffer_length, argp, sizeof(unsigned int)))
900 goto out;
901
902 /* Check size */
903 if (data_buffer_length > TW_MAX_IOCTL_SECTORS * 512) {
904 retval = -EINVAL;
905 goto out;
906 }
907
908 /* Hardware can only do multiple of 512 byte transfers */
909 data_buffer_length_adjusted = (data_buffer_length + 511) & ~511;
910
911 /* Now allocate ioctl buf memory */
912 cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, &dma_handle, GFP_KERNEL);
913 if (cpu_addr == NULL) {
914 retval = -ENOMEM;
915 goto out;
916 }
917
918 tw_ioctl = (TW_New_Ioctl *)cpu_addr;
919
920 /* Now copy down the entire ioctl */
921 if (copy_from_user(tw_ioctl, argp, data_buffer_length + sizeof(TW_New_Ioctl) - 1))
922 goto out2;
923
924 passthru = (TW_Passthru *)&tw_ioctl->firmware_command;
925
926 /* See which ioctl we are doing */
927 switch (cmd) {
928 case TW_OP_NOP:
929 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_OP_NOP.\n");
930 break;
931 case TW_OP_AEN_LISTEN:
932 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_AEN_LISTEN.\n");
933 memset(tw_ioctl->data_buffer, 0, data_buffer_length);
934
935 spin_lock_irqsave(tw_dev->host->host_lock, flags);
936 if (tw_dev->aen_head == tw_dev->aen_tail) {
937 tw_aen_code = TW_AEN_QUEUE_EMPTY;
938 } else {
939 tw_aen_code = tw_dev->aen_queue[tw_dev->aen_head];
940 if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
941 tw_dev->aen_head = TW_Q_START;
942 } else {
943 tw_dev->aen_head = tw_dev->aen_head + 1;
944 }
945 }
946 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
947 memcpy(tw_ioctl->data_buffer, &tw_aen_code, sizeof(tw_aen_code));
948 break;
949 case TW_CMD_PACKET_WITH_DATA:
950 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_CMD_PACKET_WITH_DATA.\n");
951 spin_lock_irqsave(tw_dev->host->host_lock, flags);
952
953 tw_state_request_start(tw_dev, &request_id);
954
955 /* Flag internal command */
956 tw_dev->srb[request_id] = NULL;
957
958 /* Flag chrdev ioctl */
959 tw_dev->chrdev_request_id = request_id;
960
961 tw_ioctl->firmware_command.request_id = request_id;
962
963 /* Load the sg list */
964 switch (TW_SGL_OUT(tw_ioctl->firmware_command.opcode__sgloffset)) {
965 case 2:
966 tw_ioctl->firmware_command.byte8.param.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
967 tw_ioctl->firmware_command.byte8.param.sgl[0].length = data_buffer_length_adjusted;
968 break;
969 case 3:
970 tw_ioctl->firmware_command.byte8.io.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
971 tw_ioctl->firmware_command.byte8.io.sgl[0].length = data_buffer_length_adjusted;
972 break;
973 case 5:
974 passthru->sg_list[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
975 passthru->sg_list[0].length = data_buffer_length_adjusted;
976 break;
977 }
978
979 memcpy(tw_dev->command_packet_virtual_address[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command));
980
981 /* Now post the command packet to the controller */
982 tw_post_command_packet(tw_dev, request_id);
983 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
984
985 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
986
987 /* Now wait for the command to complete */
988 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
989
990 /* We timed out, and didn't get an interrupt */
991 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
992 /* Now we need to reset the board */
993 printk(KERN_WARNING "3w-xxxx: scsi%d: Character ioctl (0x%x) timed out, resetting card.\n", tw_dev->host->host_no, cmd);
994 retval = -EIO;
995 if (tw_reset_device_extension(tw_dev)) {
996 printk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): Reset failed for card %d.\n", tw_dev->host->host_no);
997 }
998 goto out2;
999 }
1000
1001 /* Now copy in the command packet response */
1002 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virtual_address[request_id], sizeof(TW_Command));
1003
1004 /* Now complete the io */
1005 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1006 tw_dev->posted_request_count--;
1007 tw_dev->state[request_id] = TW_S_COMPLETED;
1008 tw_state_request_finish(tw_dev, request_id);
1009 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1010 break;
1011 default:
1012 retval = -ENOTTY;
1013 goto out2;
1014 }
1015
1016 /* Now copy the response to userspace */
1017 if (copy_to_user(argp, tw_ioctl, sizeof(TW_New_Ioctl) + data_buffer_length - 1))
1018 goto out2;
1019 retval = 0;
1020 out2:
1021 /* Now free ioctl buf memory */
1022 dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, cpu_addr, dma_handle);
1023 out:
1024 mutex_unlock(&tw_dev->ioctl_lock);
1025 return retval;
1026 } /* End tw_chrdev_ioctl() */
1027
1028 /* This function handles open for the character device */
1029 static int tw_chrdev_open(struct inode *inode, struct file *file)
1030 {
1031 unsigned int minor_number;
1032
1033 dprintk(KERN_WARNING "3w-xxxx: tw_ioctl_open()\n");
1034
1035 minor_number = iminor(inode);
1036 if (minor_number >= tw_device_extension_count)
1037 return -ENODEV;
1038
1039 return 0;
1040 } /* End tw_chrdev_open() */
1041
1042 /* File operations struct for character device */
1043 static const struct file_operations tw_fops = {
1044 .owner = THIS_MODULE,
1045 .ioctl = tw_chrdev_ioctl,
1046 .open = tw_chrdev_open,
1047 .release = NULL
1048 };
1049
1050 /* This function will free up device extension resources */
1051 static void tw_free_device_extension(TW_Device_Extension *tw_dev)
1052 {
1053 dprintk(KERN_NOTICE "3w-xxxx: tw_free_device_extension()\n");
1054
1055 /* Free command packet and generic buffer memory */
1056 if (tw_dev->command_packet_virtual_address[0])
1057 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]);
1058
1059 if (tw_dev->alignment_virtual_address[0])
1060 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]);
1061 } /* End tw_free_device_extension() */
1062
1063 /* This function will send an initconnection command to controller */
1064 static int tw_initconnection(TW_Device_Extension *tw_dev, int message_credits)
1065 {
1066 unsigned long command_que_value;
1067 TW_Command *command_packet;
1068 TW_Response_Queue response_queue;
1069 int request_id = 0;
1070
1071 dprintk(KERN_NOTICE "3w-xxxx: tw_initconnection()\n");
1072
1073 /* Initialize InitConnection command packet */
1074 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1075 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet virtual address.\n");
1076 return 1;
1077 }
1078
1079 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1080 memset(command_packet, 0, sizeof(TW_Sector));
1081 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_INIT_CONNECTION);
1082 command_packet->size = TW_INIT_COMMAND_PACKET_SIZE;
1083 command_packet->request_id = request_id;
1084 command_packet->status = 0x0;
1085 command_packet->flags = 0x0;
1086 command_packet->byte6.message_credits = message_credits;
1087 command_packet->byte8.init_connection.response_queue_pointer = 0x0;
1088 command_que_value = tw_dev->command_packet_physical_address[request_id];
1089
1090 if (command_que_value == 0) {
1091 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet physical address.\n");
1092 return 1;
1093 }
1094
1095 /* Send command packet to the board */
1096 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1097
1098 /* Poll for completion */
1099 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1100 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1101 request_id = TW_RESID_OUT(response_queue.response_id);
1102
1103 if (request_id != 0) {
1104 /* unexpected request id */
1105 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Unexpected request id.\n");
1106 return 1;
1107 }
1108 if (command_packet->status != 0) {
1109 /* bad response */
1110 tw_decode_sense(tw_dev, request_id, 0);
1111 return 1;
1112 }
1113 }
1114 return 0;
1115 } /* End tw_initconnection() */
1116
1117 /* Set a value in the features table */
1118 static int tw_setfeature(TW_Device_Extension *tw_dev, int parm, int param_size,
1119 unsigned char *val)
1120 {
1121 TW_Param *param;
1122 TW_Command *command_packet;
1123 TW_Response_Queue response_queue;
1124 int request_id = 0;
1125 unsigned long command_que_value;
1126 unsigned long param_value;
1127
1128 /* Initialize SetParam command packet */
1129 if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
1130 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet virtual address.\n");
1131 return 1;
1132 }
1133 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1134 memset(command_packet, 0, sizeof(TW_Sector));
1135 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1136
1137 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
1138 param->table_id = 0x404; /* Features table */
1139 param->parameter_id = parm;
1140 param->parameter_size_bytes = param_size;
1141 memcpy(param->data, val, param_size);
1142
1143 param_value = tw_dev->alignment_physical_address[request_id];
1144 if (param_value == 0) {
1145 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad alignment physical address.\n");
1146 tw_dev->state[request_id] = TW_S_COMPLETED;
1147 tw_state_request_finish(tw_dev, request_id);
1148 tw_dev->srb[request_id]->result = (DID_OK << 16);
1149 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1150 }
1151 command_packet->byte8.param.sgl[0].address = param_value;
1152 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1153
1154 command_packet->size = 4;
1155 command_packet->request_id = request_id;
1156 command_packet->byte6.parameter_count = 1;
1157
1158 command_que_value = tw_dev->command_packet_physical_address[request_id];
1159 if (command_que_value == 0) {
1160 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet physical address.\n");
1161 return 1;
1162 }
1163
1164 /* Send command packet to the board */
1165 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1166
1167 /* Poll for completion */
1168 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
1169 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1170 request_id = TW_RESID_OUT(response_queue.response_id);
1171
1172 if (request_id != 0) {
1173 /* unexpected request id */
1174 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Unexpected request id.\n");
1175 return 1;
1176 }
1177 if (command_packet->status != 0) {
1178 /* bad response */
1179 tw_decode_sense(tw_dev, request_id, 0);
1180 return 1;
1181 }
1182 }
1183
1184 return 0;
1185 } /* End tw_setfeature() */
1186
1187 /* This function will reset a controller */
1188 static int tw_reset_sequence(TW_Device_Extension *tw_dev)
1189 {
1190 int error = 0;
1191 int tries = 0;
1192 unsigned char c = 1;
1193
1194 /* Reset the board */
1195 while (tries < TW_MAX_RESET_TRIES) {
1196 TW_SOFT_RESET(tw_dev);
1197
1198 error = tw_aen_drain_queue(tw_dev);
1199 if (error) {
1200 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN drain failed, retrying.\n", tw_dev->host->host_no);
1201 tries++;
1202 continue;
1203 }
1204
1205 /* Check for controller errors */
1206 if (tw_check_errors(tw_dev)) {
1207 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors found, retrying.\n", tw_dev->host->host_no);
1208 tries++;
1209 continue;
1210 }
1211
1212 /* Now the controller is in a good state */
1213 break;
1214 }
1215
1216 if (tries >= TW_MAX_RESET_TRIES) {
1217 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors, card not responding, check all cabling.\n", tw_dev->host->host_no);
1218 return 1;
1219 }
1220
1221 error = tw_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS);
1222 if (error) {
1223 printk(KERN_WARNING "3w-xxxx: scsi%d: Connection initialization failed.\n", tw_dev->host->host_no);
1224 return 1;
1225 }
1226
1227 error = tw_setfeature(tw_dev, 2, 1, &c);
1228 if (error) {
1229 printk(KERN_WARNING "3w-xxxx: Unable to set features for card, probable old firmware or card.\n");
1230 }
1231
1232 return 0;
1233 } /* End tw_reset_sequence() */
1234
1235 /* This function will initialize the fields of a device extension */
1236 static int tw_initialize_device_extension(TW_Device_Extension *tw_dev)
1237 {
1238 int i, error=0;
1239
1240 dprintk(KERN_NOTICE "3w-xxxx: tw_initialize_device_extension()\n");
1241
1242 /* Initialize command packet buffers */
1243 error = tw_allocate_memory(tw_dev, sizeof(TW_Command), 0);
1244 if (error) {
1245 printk(KERN_WARNING "3w-xxxx: Command packet memory allocation failed.\n");
1246 return 1;
1247 }
1248
1249 /* Initialize generic buffer */
1250 error = tw_allocate_memory(tw_dev, sizeof(TW_Sector), 1);
1251 if (error) {
1252 printk(KERN_WARNING "3w-xxxx: Generic memory allocation failed.\n");
1253 return 1;
1254 }
1255
1256 for (i=0;i<TW_Q_LENGTH;i++) {
1257 tw_dev->free_queue[i] = i;
1258 tw_dev->state[i] = TW_S_INITIAL;
1259 }
1260
1261 tw_dev->pending_head = TW_Q_START;
1262 tw_dev->pending_tail = TW_Q_START;
1263 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1264
1265 mutex_init(&tw_dev->ioctl_lock);
1266 init_waitqueue_head(&tw_dev->ioctl_wqueue);
1267
1268 return 0;
1269 } /* End tw_initialize_device_extension() */
1270
1271 static int tw_map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
1272 {
1273 int use_sg;
1274
1275 dprintk(KERN_WARNING "3w-xxxx: tw_map_scsi_sg_data()\n");
1276
1277 use_sg = scsi_dma_map(cmd);
1278 if (use_sg < 0) {
1279 printk(KERN_WARNING "3w-xxxx: tw_map_scsi_sg_data(): pci_map_sg() failed.\n");
1280 return 0;
1281 }
1282
1283 cmd->SCp.phase = TW_PHASE_SGLIST;
1284 cmd->SCp.have_data_in = use_sg;
1285
1286 return use_sg;
1287 } /* End tw_map_scsi_sg_data() */
1288
1289 static void tw_unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
1290 {
1291 dprintk(KERN_WARNING "3w-xxxx: tw_unmap_scsi_data()\n");
1292
1293 scsi_dma_unmap(cmd);
1294 } /* End tw_unmap_scsi_data() */
1295
1296 /* This function will reset a device extension */
1297 static int tw_reset_device_extension(TW_Device_Extension *tw_dev)
1298 {
1299 int i = 0;
1300 struct scsi_cmnd *srb;
1301 unsigned long flags = 0;
1302
1303 dprintk(KERN_NOTICE "3w-xxxx: tw_reset_device_extension()\n");
1304
1305 set_bit(TW_IN_RESET, &tw_dev->flags);
1306 TW_DISABLE_INTERRUPTS(tw_dev);
1307 TW_MASK_COMMAND_INTERRUPT(tw_dev);
1308 spin_lock_irqsave(tw_dev->host->host_lock, flags);
1309
1310 /* Abort all requests that are in progress */
1311 for (i=0;i<TW_Q_LENGTH;i++) {
1312 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1313 (tw_dev->state[i] != TW_S_INITIAL) &&
1314 (tw_dev->state[i] != TW_S_COMPLETED)) {
1315 srb = tw_dev->srb[i];
1316 if (srb != NULL) {
1317 srb->result = (DID_RESET << 16);
1318 tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);
1319 tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[i]);
1320 }
1321 }
1322 }
1323
1324 /* Reset queues and counts */
1325 for (i=0;i<TW_Q_LENGTH;i++) {
1326 tw_dev->free_queue[i] = i;
1327 tw_dev->state[i] = TW_S_INITIAL;
1328 }
1329 tw_dev->free_head = TW_Q_START;
1330 tw_dev->free_tail = TW_Q_START;
1331 tw_dev->posted_request_count = 0;
1332 tw_dev->pending_request_count = 0;
1333 tw_dev->pending_head = TW_Q_START;
1334 tw_dev->pending_tail = TW_Q_START;
1335 tw_dev->reset_print = 0;
1336
1337 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1338
1339 if (tw_reset_sequence(tw_dev)) {
1340 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset sequence failed.\n", tw_dev->host->host_no);
1341 return 1;
1342 }
1343
1344 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
1345 clear_bit(TW_IN_RESET, &tw_dev->flags);
1346 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1347
1348 return 0;
1349 } /* End tw_reset_device_extension() */
1350
1351 /* This funciton returns unit geometry in cylinders/heads/sectors */
1352 static int tw_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev,
1353 sector_t capacity, int geom[])
1354 {
1355 int heads, sectors, cylinders;
1356 TW_Device_Extension *tw_dev;
1357
1358 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam()\n");
1359 tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
1360
1361 heads = 64;
1362 sectors = 32;
1363 cylinders = sector_div(capacity, heads * sectors);
1364
1365 if (capacity >= 0x200000) {
1366 heads = 255;
1367 sectors = 63;
1368 cylinders = sector_div(capacity, heads * sectors);
1369 }
1370
1371 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam(): heads = %d, sectors = %d, cylinders = %d\n", heads, sectors, cylinders);
1372 geom[0] = heads;
1373 geom[1] = sectors;
1374 geom[2] = cylinders;
1375
1376 return 0;
1377 } /* End tw_scsi_biosparam() */
1378
1379 /* This is the new scsi eh reset function */
1380 static int tw_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1381 {
1382 TW_Device_Extension *tw_dev=NULL;
1383 int retval = FAILED;
1384
1385 tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1386
1387 tw_dev->num_resets++;
1388
1389 sdev_printk(KERN_WARNING, SCpnt->device,
1390 "WARNING: Command (0x%x) timed out, resetting card.\n",
1391 SCpnt->cmnd[0]);
1392
1393 /* Make sure we are not issuing an ioctl or resetting from ioctl */
1394 mutex_lock(&tw_dev->ioctl_lock);
1395
1396 /* Now reset the card and some of the device extension data */
1397 if (tw_reset_device_extension(tw_dev)) {
1398 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset failed.\n", tw_dev->host->host_no);
1399 goto out;
1400 }
1401
1402 retval = SUCCESS;
1403 out:
1404 mutex_unlock(&tw_dev->ioctl_lock);
1405 return retval;
1406 } /* End tw_scsi_eh_reset() */
1407
1408 /* This function handles scsi inquiry commands */
1409 static int tw_scsiop_inquiry(TW_Device_Extension *tw_dev, int request_id)
1410 {
1411 TW_Param *param;
1412 TW_Command *command_packet;
1413 unsigned long command_que_value;
1414 unsigned long param_value;
1415
1416 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry()\n");
1417
1418 /* Initialize command packet */
1419 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1420 if (command_packet == NULL) {
1421 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet virtual address.\n");
1422 return 1;
1423 }
1424 memset(command_packet, 0, sizeof(TW_Sector));
1425 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1426 command_packet->size = 4;
1427 command_packet->request_id = request_id;
1428 command_packet->status = 0;
1429 command_packet->flags = 0;
1430 command_packet->byte6.parameter_count = 1;
1431
1432 /* Now setup the param */
1433 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1434 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment virtual address.\n");
1435 return 1;
1436 }
1437 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1438 memset(param, 0, sizeof(TW_Sector));
1439 param->table_id = 3; /* unit summary table */
1440 param->parameter_id = 3; /* unitsstatus parameter */
1441 param->parameter_size_bytes = TW_MAX_UNITS;
1442 param_value = tw_dev->alignment_physical_address[request_id];
1443 if (param_value == 0) {
1444 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment physical address.\n");
1445 return 1;
1446 }
1447
1448 command_packet->byte8.param.sgl[0].address = param_value;
1449 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1450 command_que_value = tw_dev->command_packet_physical_address[request_id];
1451 if (command_que_value == 0) {
1452 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet physical address.\n");
1453 return 1;
1454 }
1455
1456 /* Now try to post the command packet */
1457 tw_post_command_packet(tw_dev, request_id);
1458
1459 return 0;
1460 } /* End tw_scsiop_inquiry() */
1461
1462 static void tw_transfer_internal(TW_Device_Extension *tw_dev, int request_id,
1463 void *data, unsigned int len)
1464 {
1465 struct scsi_cmnd *cmd = tw_dev->srb[request_id];
1466 void *buf;
1467 unsigned int transfer_len;
1468 unsigned long flags = 0;
1469 struct scatterlist *sg = scsi_sglist(cmd);
1470
1471 local_irq_save(flags);
1472 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
1473 transfer_len = min(sg->length, len);
1474
1475 memcpy(buf, data, transfer_len);
1476
1477 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1478 local_irq_restore(flags);
1479 }
1480
1481 /* This function is called by the isr to complete an inquiry command */
1482 static int tw_scsiop_inquiry_complete(TW_Device_Extension *tw_dev, int request_id)
1483 {
1484 unsigned char *is_unit_present;
1485 unsigned char request_buffer[36];
1486 TW_Param *param;
1487
1488 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry_complete()\n");
1489
1490 memset(request_buffer, 0, sizeof(request_buffer));
1491 request_buffer[0] = TYPE_DISK; /* Peripheral device type */
1492 request_buffer[1] = 0; /* Device type modifier */
1493 request_buffer[2] = 0; /* No ansi/iso compliance */
1494 request_buffer[4] = 31; /* Additional length */
1495 memcpy(&request_buffer[8], "3ware ", 8); /* Vendor ID */
1496 sprintf(&request_buffer[16], "Logical Disk %-2d ", tw_dev->srb[request_id]->device->id);
1497 memcpy(&request_buffer[32], TW_DRIVER_VERSION, 3);
1498 tw_transfer_internal(tw_dev, request_id, request_buffer,
1499 sizeof(request_buffer));
1500
1501 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1502 if (param == NULL) {
1503 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry_complete(): Bad alignment virtual address.\n");
1504 return 1;
1505 }
1506 is_unit_present = &(param->data[0]);
1507
1508 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1509 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1510 } else {
1511 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1512 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1513 return TW_ISR_DONT_RESULT;
1514 }
1515
1516 return 0;
1517 } /* End tw_scsiop_inquiry_complete() */
1518
1519 /* This function handles scsi mode_sense commands */
1520 static int tw_scsiop_mode_sense(TW_Device_Extension *tw_dev, int request_id)
1521 {
1522 TW_Param *param;
1523 TW_Command *command_packet;
1524 unsigned long command_que_value;
1525 unsigned long param_value;
1526
1527 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense()\n");
1528
1529 /* Only page control = 0, page code = 0x8 (cache page) supported */
1530 if (tw_dev->srb[request_id]->cmnd[2] != 0x8) {
1531 tw_dev->state[request_id] = TW_S_COMPLETED;
1532 tw_state_request_finish(tw_dev, request_id);
1533 tw_dev->srb[request_id]->result = (DID_OK << 16);
1534 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1535 return 0;
1536 }
1537
1538 /* Now read firmware cache setting for this unit */
1539 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1540 if (command_packet == NULL) {
1541 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet virtual address.\n");
1542 return 1;
1543 }
1544
1545 /* Setup the command packet */
1546 memset(command_packet, 0, sizeof(TW_Sector));
1547 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1548 command_packet->size = 4;
1549 command_packet->request_id = request_id;
1550 command_packet->status = 0;
1551 command_packet->flags = 0;
1552 command_packet->byte6.parameter_count = 1;
1553
1554 /* Setup the param */
1555 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1556 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment virtual address.\n");
1557 return 1;
1558 }
1559
1560 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1561 memset(param, 0, sizeof(TW_Sector));
1562 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE + tw_dev->srb[request_id]->device->id;
1563 param->parameter_id = 7; /* unit flags */
1564 param->parameter_size_bytes = 1;
1565 param_value = tw_dev->alignment_physical_address[request_id];
1566 if (param_value == 0) {
1567 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment physical address.\n");
1568 return 1;
1569 }
1570
1571 command_packet->byte8.param.sgl[0].address = param_value;
1572 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1573 command_que_value = tw_dev->command_packet_physical_address[request_id];
1574 if (command_que_value == 0) {
1575 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet physical address.\n");
1576 return 1;
1577 }
1578
1579 /* Now try to post the command packet */
1580 tw_post_command_packet(tw_dev, request_id);
1581
1582 return 0;
1583 } /* End tw_scsiop_mode_sense() */
1584
1585 /* This function is called by the isr to complete a mode sense command */
1586 static int tw_scsiop_mode_sense_complete(TW_Device_Extension *tw_dev, int request_id)
1587 {
1588 TW_Param *param;
1589 unsigned char *flags;
1590 unsigned char request_buffer[8];
1591
1592 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense_complete()\n");
1593
1594 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1595 if (param == NULL) {
1596 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense_complete(): Bad alignment virtual address.\n");
1597 return 1;
1598 }
1599 flags = (char *)&(param->data[0]);
1600 memset(request_buffer, 0, sizeof(request_buffer));
1601
1602 request_buffer[0] = 0xf; /* mode data length */
1603 request_buffer[1] = 0; /* default medium type */
1604 request_buffer[2] = 0x10; /* dpo/fua support on */
1605 request_buffer[3] = 0; /* no block descriptors */
1606 request_buffer[4] = 0x8; /* caching page */
1607 request_buffer[5] = 0xa; /* page length */
1608 if (*flags & 0x1)
1609 request_buffer[6] = 0x5; /* WCE on, RCD on */
1610 else
1611 request_buffer[6] = 0x1; /* WCE off, RCD on */
1612 tw_transfer_internal(tw_dev, request_id, request_buffer,
1613 sizeof(request_buffer));
1614
1615 return 0;
1616 } /* End tw_scsiop_mode_sense_complete() */
1617
1618 /* This function handles scsi read_capacity commands */
1619 static int tw_scsiop_read_capacity(TW_Device_Extension *tw_dev, int request_id)
1620 {
1621 TW_Param *param;
1622 TW_Command *command_packet;
1623 unsigned long command_que_value;
1624 unsigned long param_value;
1625
1626 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity()\n");
1627
1628 /* Initialize command packet */
1629 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1630
1631 if (command_packet == NULL) {
1632 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet virtual address.\n");
1633 return 1;
1634 }
1635 memset(command_packet, 0, sizeof(TW_Sector));
1636 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1637 command_packet->size = 4;
1638 command_packet->request_id = request_id;
1639 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1640 command_packet->status = 0;
1641 command_packet->flags = 0;
1642 command_packet->byte6.block_count = 1;
1643
1644 /* Now setup the param */
1645 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1646 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment virtual address.\n");
1647 return 1;
1648 }
1649 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1650 memset(param, 0, sizeof(TW_Sector));
1651 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE +
1652 tw_dev->srb[request_id]->device->id;
1653 param->parameter_id = 4; /* unitcapacity parameter */
1654 param->parameter_size_bytes = 4;
1655 param_value = tw_dev->alignment_physical_address[request_id];
1656 if (param_value == 0) {
1657 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment physical address.\n");
1658 return 1;
1659 }
1660
1661 command_packet->byte8.param.sgl[0].address = param_value;
1662 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1663 command_que_value = tw_dev->command_packet_physical_address[request_id];
1664 if (command_que_value == 0) {
1665 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet physical address.\n");
1666 return 1;
1667 }
1668
1669 /* Now try to post the command to the board */
1670 tw_post_command_packet(tw_dev, request_id);
1671
1672 return 0;
1673 } /* End tw_scsiop_read_capacity() */
1674
1675 /* This function is called by the isr to complete a readcapacity command */
1676 static int tw_scsiop_read_capacity_complete(TW_Device_Extension *tw_dev, int request_id)
1677 {
1678 unsigned char *param_data;
1679 u32 capacity;
1680 char buff[8];
1681 TW_Param *param;
1682
1683 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete()\n");
1684
1685 memset(buff, 0, sizeof(buff));
1686 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1687 if (param == NULL) {
1688 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_capacity_complete(): Bad alignment virtual address.\n");
1689 return 1;
1690 }
1691 param_data = &(param->data[0]);
1692
1693 capacity = (param_data[3] << 24) | (param_data[2] << 16) |
1694 (param_data[1] << 8) | param_data[0];
1695
1696 /* Subtract one sector to fix get last sector ioctl */
1697 capacity -= 1;
1698
1699 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete(): Capacity = 0x%x.\n", capacity);
1700
1701 /* Number of LBA's */
1702 buff[0] = (capacity >> 24);
1703 buff[1] = (capacity >> 16) & 0xff;
1704 buff[2] = (capacity >> 8) & 0xff;
1705 buff[3] = capacity & 0xff;
1706
1707 /* Block size in bytes (512) */
1708 buff[4] = (TW_BLOCK_SIZE >> 24);
1709 buff[5] = (TW_BLOCK_SIZE >> 16) & 0xff;
1710 buff[6] = (TW_BLOCK_SIZE >> 8) & 0xff;
1711 buff[7] = TW_BLOCK_SIZE & 0xff;
1712
1713 tw_transfer_internal(tw_dev, request_id, buff, sizeof(buff));
1714
1715 return 0;
1716 } /* End tw_scsiop_read_capacity_complete() */
1717
1718 /* This function handles scsi read or write commands */
1719 static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id)
1720 {
1721 TW_Command *command_packet;
1722 unsigned long command_que_value;
1723 u32 lba = 0x0, num_sectors = 0x0;
1724 int i, use_sg;
1725 struct scsi_cmnd *srb;
1726 struct scatterlist *sglist, *sg;
1727
1728 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write()\n");
1729
1730 srb = tw_dev->srb[request_id];
1731
1732 sglist = scsi_sglist(srb);
1733 if (!sglist) {
1734 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Request buffer NULL.\n");
1735 return 1;
1736 }
1737
1738 /* Initialize command packet */
1739 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1740 if (command_packet == NULL) {
1741 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): Bad command packet virtual address.\n");
1742 return 1;
1743 }
1744
1745 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == READ_10) {
1746 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_READ);
1747 } else {
1748 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_WRITE);
1749 }
1750
1751 command_packet->size = 3;
1752 command_packet->request_id = request_id;
1753 command_packet->unit__hostid = TW_UNITHOST_IN(0, srb->device->id);
1754 command_packet->status = 0;
1755 command_packet->flags = 0;
1756
1757 if (srb->cmnd[0] == WRITE_10) {
1758 if ((srb->cmnd[1] & 0x8) || (srb->cmnd[1] & 0x10))
1759 command_packet->flags = 1;
1760 }
1761
1762 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6) {
1763 lba = ((u32)srb->cmnd[1] << 16) | ((u32)srb->cmnd[2] << 8) | (u32)srb->cmnd[3];
1764 num_sectors = (u32)srb->cmnd[4];
1765 } else {
1766 lba = ((u32)srb->cmnd[2] << 24) | ((u32)srb->cmnd[3] << 16) | ((u32)srb->cmnd[4] << 8) | (u32)srb->cmnd[5];
1767 num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
1768 }
1769
1770 /* Update sector statistic */
1771 tw_dev->sector_count = num_sectors;
1772 if (tw_dev->sector_count > tw_dev->max_sector_count)
1773 tw_dev->max_sector_count = tw_dev->sector_count;
1774
1775 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): lba = 0x%x num_sectors = 0x%x\n", lba, num_sectors);
1776 command_packet->byte8.io.lba = lba;
1777 command_packet->byte6.block_count = num_sectors;
1778
1779 use_sg = tw_map_scsi_sg_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
1780 if (!use_sg)
1781 return 1;
1782
1783 scsi_for_each_sg(tw_dev->srb[request_id], sg, use_sg, i) {
1784 command_packet->byte8.io.sgl[i].address = sg_dma_address(sg);
1785 command_packet->byte8.io.sgl[i].length = sg_dma_len(sg);
1786 command_packet->size+=2;
1787 }
1788
1789 /* Update SG statistics */
1790 tw_dev->sgl_entries = scsi_sg_count(tw_dev->srb[request_id]);
1791 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
1792 tw_dev->max_sgl_entries = tw_dev->sgl_entries;
1793
1794 command_que_value = tw_dev->command_packet_physical_address[request_id];
1795 if (command_que_value == 0) {
1796 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Bad command packet physical address.\n");
1797 return 1;
1798 }
1799
1800 /* Now try to post the command to the board */
1801 tw_post_command_packet(tw_dev, request_id);
1802
1803 return 0;
1804 } /* End tw_scsiop_read_write() */
1805
1806 /* This function will handle the request sense scsi command */
1807 static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id)
1808 {
1809 char request_buffer[18];
1810
1811 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n");
1812
1813 memset(request_buffer, 0, sizeof(request_buffer));
1814 request_buffer[0] = 0x70; /* Immediate fixed format */
1815 request_buffer[7] = 10; /* minimum size per SPC: 18 bytes */
1816 /* leave all other fields zero, giving effectively NO_SENSE return */
1817 tw_transfer_internal(tw_dev, request_id, request_buffer,
1818 sizeof(request_buffer));
1819
1820 tw_dev->state[request_id] = TW_S_COMPLETED;
1821 tw_state_request_finish(tw_dev, request_id);
1822
1823 /* If we got a request_sense, we probably want a reset, return error */
1824 tw_dev->srb[request_id]->result = (DID_ERROR << 16);
1825 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1826
1827 return 0;
1828 } /* End tw_scsiop_request_sense() */
1829
1830 /* This function will handle synchronize cache scsi command */
1831 static int tw_scsiop_synchronize_cache(TW_Device_Extension *tw_dev, int request_id)
1832 {
1833 TW_Command *command_packet;
1834 unsigned long command_que_value;
1835
1836 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_synchronize_cache()\n");
1837
1838 /* Send firmware flush command for this unit */
1839 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1840 if (command_packet == NULL) {
1841 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet virtual address.\n");
1842 return 1;
1843 }
1844
1845 /* Setup the command packet */
1846 memset(command_packet, 0, sizeof(TW_Sector));
1847 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_FLUSH_CACHE);
1848 command_packet->size = 2;
1849 command_packet->request_id = request_id;
1850 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1851 command_packet->status = 0;
1852 command_packet->flags = 0;
1853 command_packet->byte6.parameter_count = 1;
1854 command_que_value = tw_dev->command_packet_physical_address[request_id];
1855 if (command_que_value == 0) {
1856 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet physical address.\n");
1857 return 1;
1858 }
1859
1860 /* Now try to post the command packet */
1861 tw_post_command_packet(tw_dev, request_id);
1862
1863 return 0;
1864 } /* End tw_scsiop_synchronize_cache() */
1865
1866 /* This function will handle test unit ready scsi command */
1867 static int tw_scsiop_test_unit_ready(TW_Device_Extension *tw_dev, int request_id)
1868 {
1869 TW_Param *param;
1870 TW_Command *command_packet;
1871 unsigned long command_que_value;
1872 unsigned long param_value;
1873
1874 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_test_unit_ready()\n");
1875
1876 /* Initialize command packet */
1877 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1878 if (command_packet == NULL) {
1879 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet virtual address.\n");
1880 return 1;
1881 }
1882 memset(command_packet, 0, sizeof(TW_Sector));
1883 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1884 command_packet->size = 4;
1885 command_packet->request_id = request_id;
1886 command_packet->status = 0;
1887 command_packet->flags = 0;
1888 command_packet->byte6.parameter_count = 1;
1889
1890 /* Now setup the param */
1891 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1892 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment virtual address.\n");
1893 return 1;
1894 }
1895 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1896 memset(param, 0, sizeof(TW_Sector));
1897 param->table_id = 3; /* unit summary table */
1898 param->parameter_id = 3; /* unitsstatus parameter */
1899 param->parameter_size_bytes = TW_MAX_UNITS;
1900 param_value = tw_dev->alignment_physical_address[request_id];
1901 if (param_value == 0) {
1902 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment physical address.\n");
1903 return 1;
1904 }
1905
1906 command_packet->byte8.param.sgl[0].address = param_value;
1907 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1908 command_que_value = tw_dev->command_packet_physical_address[request_id];
1909 if (command_que_value == 0) {
1910 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet physical address.\n");
1911 return 1;
1912 }
1913
1914 /* Now try to post the command packet */
1915 tw_post_command_packet(tw_dev, request_id);
1916
1917 return 0;
1918 } /* End tw_scsiop_test_unit_ready() */
1919
1920 /* This function is called by the isr to complete a testunitready command */
1921 static int tw_scsiop_test_unit_ready_complete(TW_Device_Extension *tw_dev, int request_id)
1922 {
1923 unsigned char *is_unit_present;
1924 TW_Param *param;
1925
1926 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete()\n");
1927
1928 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1929 if (param == NULL) {
1930 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete(): Bad alignment virtual address.\n");
1931 return 1;
1932 }
1933 is_unit_present = &(param->data[0]);
1934
1935 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1936 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1937 } else {
1938 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1939 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1940 return TW_ISR_DONT_RESULT;
1941 }
1942
1943 return 0;
1944 } /* End tw_scsiop_test_unit_ready_complete() */
1945
1946 /* This is the main scsi queue function to handle scsi opcodes */
1947 static int tw_scsi_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
1948 {
1949 unsigned char *command = SCpnt->cmnd;
1950 int request_id = 0;
1951 int retval = 1;
1952 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1953
1954 /* If we are resetting due to timed out ioctl, report as busy */
1955 if (test_bit(TW_IN_RESET, &tw_dev->flags))
1956 return SCSI_MLQUEUE_HOST_BUSY;
1957
1958 /* Save done function into Scsi_Cmnd struct */
1959 SCpnt->scsi_done = done;
1960
1961 /* Queue the command and get a request id */
1962 tw_state_request_start(tw_dev, &request_id);
1963
1964 /* Save the scsi command for use by the ISR */
1965 tw_dev->srb[request_id] = SCpnt;
1966
1967 /* Initialize phase to zero */
1968 SCpnt->SCp.phase = TW_PHASE_INITIAL;
1969
1970 switch (*command) {
1971 case READ_10:
1972 case READ_6:
1973 case WRITE_10:
1974 case WRITE_6:
1975 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ/WRITE.\n");
1976 retval = tw_scsiop_read_write(tw_dev, request_id);
1977 break;
1978 case TEST_UNIT_READY:
1979 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught TEST_UNIT_READY.\n");
1980 retval = tw_scsiop_test_unit_ready(tw_dev, request_id);
1981 break;
1982 case INQUIRY:
1983 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught INQUIRY.\n");
1984 retval = tw_scsiop_inquiry(tw_dev, request_id);
1985 break;
1986 case READ_CAPACITY:
1987 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ_CAPACITY.\n");
1988 retval = tw_scsiop_read_capacity(tw_dev, request_id);
1989 break;
1990 case REQUEST_SENSE:
1991 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught REQUEST_SENSE.\n");
1992 retval = tw_scsiop_request_sense(tw_dev, request_id);
1993 break;
1994 case MODE_SENSE:
1995 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught MODE_SENSE.\n");
1996 retval = tw_scsiop_mode_sense(tw_dev, request_id);
1997 break;
1998 case SYNCHRONIZE_CACHE:
1999 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught SYNCHRONIZE_CACHE.\n");
2000 retval = tw_scsiop_synchronize_cache(tw_dev, request_id);
2001 break;
2002 case TW_IOCTL:
2003 printk(KERN_WARNING "3w-xxxx: SCSI_IOCTL_SEND_COMMAND deprecated, please update your 3ware tools.\n");
2004 break;
2005 default:
2006 printk(KERN_NOTICE "3w-xxxx: scsi%d: Unknown scsi opcode: 0x%x\n", tw_dev->host->host_no, *command);
2007 tw_dev->state[request_id] = TW_S_COMPLETED;
2008 tw_state_request_finish(tw_dev, request_id);
2009 SCpnt->result = (DID_BAD_TARGET << 16);
2010 done(SCpnt);
2011 retval = 0;
2012 }
2013 if (retval) {
2014 tw_dev->state[request_id] = TW_S_COMPLETED;
2015 tw_state_request_finish(tw_dev, request_id);
2016 SCpnt->result = (DID_ERROR << 16);
2017 done(SCpnt);
2018 retval = 0;
2019 }
2020 return retval;
2021 } /* End tw_scsi_queue() */
2022
2023 /* This function is the interrupt service routine */
2024 static irqreturn_t tw_interrupt(int irq, void *dev_instance)
2025 {
2026 int request_id;
2027 u32 status_reg_value;
2028 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
2029 TW_Response_Queue response_que;
2030 int error = 0, retval = 0;
2031 TW_Command *command_packet;
2032 int handled = 0;
2033
2034 /* Get the host lock for io completions */
2035 spin_lock(tw_dev->host->host_lock);
2036
2037 /* Read the registers */
2038 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2039
2040 /* Check if this is our interrupt, otherwise bail */
2041 if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
2042 goto tw_interrupt_bail;
2043
2044 handled = 1;
2045
2046 /* If we are resetting, bail */
2047 if (test_bit(TW_IN_RESET, &tw_dev->flags))
2048 goto tw_interrupt_bail;
2049
2050 /* Check controller for errors */
2051 if (tw_check_bits(status_reg_value)) {
2052 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2053 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2054 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2055 goto tw_interrupt_bail;
2056 }
2057 }
2058
2059 /* Handle host interrupt */
2060 if (status_reg_value & TW_STATUS_HOST_INTERRUPT) {
2061 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received host interrupt.\n");
2062 TW_CLEAR_HOST_INTERRUPT(tw_dev);
2063 }
2064
2065 /* Handle attention interrupt */
2066 if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
2067 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received attention interrupt.\n");
2068 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
2069 tw_state_request_start(tw_dev, &request_id);
2070 error = tw_aen_read_queue(tw_dev, request_id);
2071 if (error) {
2072 printk(KERN_WARNING "3w-xxxx: scsi%d: Error reading aen queue.\n", tw_dev->host->host_no);
2073 tw_dev->state[request_id] = TW_S_COMPLETED;
2074 tw_state_request_finish(tw_dev, request_id);
2075 }
2076 }
2077
2078 /* Handle command interrupt */
2079 if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
2080 /* Drain as many pending commands as we can */
2081 while (tw_dev->pending_request_count > 0) {
2082 request_id = tw_dev->pending_queue[tw_dev->pending_head];
2083 if (tw_dev->state[request_id] != TW_S_PENDING) {
2084 printk(KERN_WARNING "3w-xxxx: scsi%d: Found request id that wasn't pending.\n", tw_dev->host->host_no);
2085 break;
2086 }
2087 if (tw_post_command_packet(tw_dev, request_id)==0) {
2088 if (tw_dev->pending_head == TW_Q_LENGTH-1) {
2089 tw_dev->pending_head = TW_Q_START;
2090 } else {
2091 tw_dev->pending_head = tw_dev->pending_head + 1;
2092 }
2093 tw_dev->pending_request_count--;
2094 } else {
2095 /* If we get here, we will continue re-posting on the next command interrupt */
2096 break;
2097 }
2098 }
2099 /* If there are no more pending requests, we mask command interrupt */
2100 if (tw_dev->pending_request_count == 0)
2101 TW_MASK_COMMAND_INTERRUPT(tw_dev);
2102 }
2103
2104 /* Handle response interrupt */
2105 if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
2106 /* Drain the response queue from the board */
2107 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
2108 /* Read response queue register */
2109 response_que.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
2110 request_id = TW_RESID_OUT(response_que.response_id);
2111 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
2112 error = 0;
2113
2114 /* Check for bad response */
2115 if (command_packet->status != 0) {
2116 /* If internal command, don't error, don't fill sense */
2117 if (tw_dev->srb[request_id] == NULL) {
2118 tw_decode_sense(tw_dev, request_id, 0);
2119 } else {
2120 error = tw_decode_sense(tw_dev, request_id, 1);
2121 }
2122 }
2123
2124 /* Check for correct state */
2125 if (tw_dev->state[request_id] != TW_S_POSTED) {
2126 if (tw_dev->srb[request_id] != NULL) {
2127 printk(KERN_WARNING "3w-xxxx: scsi%d: Received a request id that wasn't posted.\n", tw_dev->host->host_no);
2128 error = 1;
2129 }
2130 }
2131
2132 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Response queue request id: %d.\n", request_id);
2133
2134 /* Check for internal command completion */
2135 if (tw_dev->srb[request_id] == NULL) {
2136 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Found internally posted command.\n");
2137 /* Check for chrdev ioctl completion */
2138 if (request_id != tw_dev->chrdev_request_id) {
2139 retval = tw_aen_complete(tw_dev, request_id);
2140 if (retval) {
2141 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing aen.\n", tw_dev->host->host_no);
2142 }
2143 } else {
2144 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
2145 wake_up(&tw_dev->ioctl_wqueue);
2146 }
2147 } else {
2148 switch (tw_dev->srb[request_id]->cmnd[0]) {
2149 case READ_10:
2150 case READ_6:
2151 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_10/READ_6\n");
2152 break;
2153 case WRITE_10:
2154 case WRITE_6:
2155 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught WRITE_10/WRITE_6\n");
2156 break;
2157 case TEST_UNIT_READY:
2158 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught TEST_UNIT_READY\n");
2159 error = tw_scsiop_test_unit_ready_complete(tw_dev, request_id);
2160 break;
2161 case INQUIRY:
2162 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught INQUIRY\n");
2163 error = tw_scsiop_inquiry_complete(tw_dev, request_id);
2164 break;
2165 case READ_CAPACITY:
2166 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_CAPACITY\n");
2167 error = tw_scsiop_read_capacity_complete(tw_dev, request_id);
2168 break;
2169 case MODE_SENSE:
2170 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught MODE_SENSE\n");
2171 error = tw_scsiop_mode_sense_complete(tw_dev, request_id);
2172 break;
2173 case SYNCHRONIZE_CACHE:
2174 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught SYNCHRONIZE_CACHE\n");
2175 break;
2176 default:
2177 printk(KERN_WARNING "3w-xxxx: case slip in tw_interrupt()\n");
2178 error = 1;
2179 }
2180
2181 /* If no error command was a success */
2182 if (error == 0) {
2183 tw_dev->srb[request_id]->result = (DID_OK << 16);
2184 }
2185
2186 /* If error, command failed */
2187 if (error == 1) {
2188 /* Ask for a host reset */
2189 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
2190 }
2191
2192 /* Now complete the io */
2193 if ((error != TW_ISR_DONT_COMPLETE)) {
2194 tw_dev->state[request_id] = TW_S_COMPLETED;
2195 tw_state_request_finish(tw_dev, request_id);
2196 tw_dev->posted_request_count--;
2197 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
2198
2199 tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
2200 }
2201 }
2202
2203 /* Check for valid status after each drain */
2204 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2205 if (tw_check_bits(status_reg_value)) {
2206 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2207 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2208 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2209 goto tw_interrupt_bail;
2210 }
2211 }
2212 }
2213 }
2214
2215 tw_interrupt_bail:
2216 spin_unlock(tw_dev->host->host_lock);
2217 return IRQ_RETVAL(handled);
2218 } /* End tw_interrupt() */
2219
2220 /* This function tells the controller to shut down */
2221 static void __tw_shutdown(TW_Device_Extension *tw_dev)
2222 {
2223 /* Disable interrupts */
2224 TW_DISABLE_INTERRUPTS(tw_dev);
2225
2226 /* Free up the IRQ */
2227 free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
2228
2229 printk(KERN_WARNING "3w-xxxx: Shutting down host %d.\n", tw_dev->host->host_no);
2230
2231 /* Tell the card we are shutting down */
2232 if (tw_initconnection(tw_dev, 1)) {
2233 printk(KERN_WARNING "3w-xxxx: Connection shutdown failed.\n");
2234 } else {
2235 printk(KERN_WARNING "3w-xxxx: Shutdown complete.\n");
2236 }
2237
2238 /* Clear all interrupts just before exit */
2239 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2240 } /* End __tw_shutdown() */
2241
2242 /* Wrapper for __tw_shutdown */
2243 static void tw_shutdown(struct pci_dev *pdev)
2244 {
2245 struct Scsi_Host *host = pci_get_drvdata(pdev);
2246 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2247
2248 __tw_shutdown(tw_dev);
2249 } /* End tw_shutdown() */
2250
2251 static struct scsi_host_template driver_template = {
2252 .module = THIS_MODULE,
2253 .name = "3ware Storage Controller",
2254 .queuecommand = tw_scsi_queue,
2255 .eh_host_reset_handler = tw_scsi_eh_reset,
2256 .bios_param = tw_scsi_biosparam,
2257 .change_queue_depth = tw_change_queue_depth,
2258 .can_queue = TW_Q_LENGTH-2,
2259 .this_id = -1,
2260 .sg_tablesize = TW_MAX_SGL_LENGTH,
2261 .max_sectors = TW_MAX_SECTORS,
2262 .cmd_per_lun = TW_MAX_CMDS_PER_LUN,
2263 .use_clustering = ENABLE_CLUSTERING,
2264 .shost_attrs = tw_host_attrs,
2265 .emulated = 1
2266 };
2267
2268 /* This function will probe and initialize a card */
2269 static int __devinit tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
2270 {
2271 struct Scsi_Host *host = NULL;
2272 TW_Device_Extension *tw_dev;
2273 int retval = -ENODEV;
2274
2275 retval = pci_enable_device(pdev);
2276 if (retval) {
2277 printk(KERN_WARNING "3w-xxxx: Failed to enable pci device.");
2278 goto out_disable_device;
2279 }
2280
2281 pci_set_master(pdev);
2282
2283 retval = pci_set_dma_mask(pdev, TW_DMA_MASK);
2284 if (retval) {
2285 printk(KERN_WARNING "3w-xxxx: Failed to set dma mask.");
2286 goto out_disable_device;
2287 }
2288
2289 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2290 if (!host) {
2291 printk(KERN_WARNING "3w-xxxx: Failed to allocate memory for device extension.");
2292 retval = -ENOMEM;
2293 goto out_disable_device;
2294 }
2295 tw_dev = (TW_Device_Extension *)host->hostdata;
2296
2297 memset(tw_dev, 0, sizeof(TW_Device_Extension));
2298
2299 /* Save values to device extension */
2300 tw_dev->host = host;
2301 tw_dev->tw_pci_dev = pdev;
2302
2303 if (tw_initialize_device_extension(tw_dev)) {
2304 printk(KERN_WARNING "3w-xxxx: Failed to initialize device extension.");
2305 goto out_free_device_extension;
2306 }
2307
2308 /* Request IO regions */
2309 retval = pci_request_regions(pdev, "3w-xxxx");
2310 if (retval) {
2311 printk(KERN_WARNING "3w-xxxx: Failed to get mem region.");
2312 goto out_free_device_extension;
2313 }
2314
2315 /* Save base address */
2316 tw_dev->base_addr = pci_resource_start(pdev, 0);
2317 if (!tw_dev->base_addr) {
2318 printk(KERN_WARNING "3w-xxxx: Failed to get io address.");
2319 goto out_release_mem_region;
2320 }
2321
2322 /* Disable interrupts on the card */
2323 TW_DISABLE_INTERRUPTS(tw_dev);
2324
2325 /* Initialize the card */
2326 if (tw_reset_sequence(tw_dev))
2327 goto out_release_mem_region;
2328
2329 /* Set host specific parameters */
2330 host->max_id = TW_MAX_UNITS;
2331 host->max_cmd_len = TW_MAX_CDB_LEN;
2332
2333 /* Luns and channels aren't supported by adapter */
2334 host->max_lun = 0;
2335 host->max_channel = 0;
2336
2337 /* Register the card with the kernel SCSI layer */
2338 retval = scsi_add_host(host, &pdev->dev);
2339 if (retval) {
2340 printk(KERN_WARNING "3w-xxxx: scsi add host failed");
2341 goto out_release_mem_region;
2342 }
2343
2344 pci_set_drvdata(pdev, host);
2345
2346 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);
2347
2348 /* Now setup the interrupt handler */
2349 retval = request_irq(pdev->irq, tw_interrupt, IRQF_SHARED, "3w-xxxx", tw_dev);
2350 if (retval) {
2351 printk(KERN_WARNING "3w-xxxx: Error requesting IRQ.");
2352 goto out_remove_host;
2353 }
2354
2355 tw_device_extension_list[tw_device_extension_count] = tw_dev;
2356 tw_device_extension_count++;
2357
2358 /* Re-enable interrupts on the card */
2359 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2360
2361 /* Finally, scan the host */
2362 scsi_scan_host(host);
2363
2364 if (twe_major == -1) {
2365 if ((twe_major = register_chrdev (0, "twe", &tw_fops)) < 0)
2366 printk(KERN_WARNING "3w-xxxx: Failed to register character device.");
2367 }
2368 return 0;
2369
2370 out_remove_host:
2371 scsi_remove_host(host);
2372 out_release_mem_region:
2373 pci_release_regions(pdev);
2374 out_free_device_extension:
2375 tw_free_device_extension(tw_dev);
2376 scsi_host_put(host);
2377 out_disable_device:
2378 pci_disable_device(pdev);
2379
2380 return retval;
2381 } /* End tw_probe() */
2382
2383 /* This function is called to remove a device */
2384 static void tw_remove(struct pci_dev *pdev)
2385 {
2386 struct Scsi_Host *host = pci_get_drvdata(pdev);
2387 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2388
2389 scsi_remove_host(tw_dev->host);
2390
2391 /* Unregister character device */
2392 if (twe_major >= 0) {
2393 unregister_chrdev(twe_major, "twe");
2394 twe_major = -1;
2395 }
2396
2397 /* Shutdown the card */
2398 __tw_shutdown(tw_dev);
2399
2400 /* Free up the mem region */
2401 pci_release_regions(pdev);
2402
2403 /* Free up device extension resources */
2404 tw_free_device_extension(tw_dev);
2405
2406 scsi_host_put(tw_dev->host);
2407 pci_disable_device(pdev);
2408 tw_device_extension_count--;
2409 } /* End tw_remove() */
2410
2411 /* PCI Devices supported by this driver */
2412 static struct pci_device_id tw_pci_tbl[] __devinitdata = {
2413 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_1000,
2414 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2415 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_7000,
2416 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2417 { }
2418 };
2419 MODULE_DEVICE_TABLE(pci, tw_pci_tbl);
2420
2421 /* pci_driver initializer */
2422 static struct pci_driver tw_driver = {
2423 .name = "3w-xxxx",
2424 .id_table = tw_pci_tbl,
2425 .probe = tw_probe,
2426 .remove = tw_remove,
2427 .shutdown = tw_shutdown,
2428 };
2429
2430 /* This function is called on driver initialization */
2431 static int __init tw_init(void)
2432 {
2433 printk(KERN_WARNING "3ware Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2434
2435 return pci_register_driver(&tw_driver);
2436 } /* End tw_init() */
2437
2438 /* This function is called on driver exit */
2439 static void __exit tw_exit(void)
2440 {
2441 pci_unregister_driver(&tw_driver);
2442 } /* End tw_exit() */
2443
2444 module_init(tw_init);
2445 module_exit(tw_exit);
2446
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