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[PATCH] ipmi: doc updates
[linux-2.6/mini2440.git] / drivers / scsi / 3w-xxxx.c
blobb6dc576da4306f28f861ffe853bb536444410627
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 tw_dev->num_resets++;
1434
1435 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]);
1436
1437 /* Now reset the card and some of the device extension data */
1438 if (tw_reset_device_extension(tw_dev, 0)) {
1439 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset failed.\n", tw_dev->host->host_no);
1440 goto out;
1441 }
1442
1443 retval = SUCCESS;
1444 out:
1445 return retval;
1446 } /* End tw_scsi_eh_reset() */
1447
1448 /* This function handles scsi inquiry commands */
1449 static int tw_scsiop_inquiry(TW_Device_Extension *tw_dev, int request_id)
1450 {
1451 TW_Param *param;
1452 TW_Command *command_packet;
1453 unsigned long command_que_value;
1454 unsigned long param_value;
1455
1456 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry()\n");
1457
1458 /* Initialize command packet */
1459 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1460 if (command_packet == NULL) {
1461 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet virtual address.\n");
1462 return 1;
1463 }
1464 memset(command_packet, 0, sizeof(TW_Sector));
1465 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1466 command_packet->size = 4;
1467 command_packet->request_id = request_id;
1468 command_packet->status = 0;
1469 command_packet->flags = 0;
1470 command_packet->byte6.parameter_count = 1;
1471
1472 /* Now setup the param */
1473 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1474 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment virtual address.\n");
1475 return 1;
1476 }
1477 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1478 memset(param, 0, sizeof(TW_Sector));
1479 param->table_id = 3; /* unit summary table */
1480 param->parameter_id = 3; /* unitsstatus parameter */
1481 param->parameter_size_bytes = TW_MAX_UNITS;
1482 param_value = tw_dev->alignment_physical_address[request_id];
1483 if (param_value == 0) {
1484 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment physical address.\n");
1485 return 1;
1486 }
1487
1488 command_packet->byte8.param.sgl[0].address = param_value;
1489 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1490 command_que_value = tw_dev->command_packet_physical_address[request_id];
1491 if (command_que_value == 0) {
1492 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet physical address.\n");
1493 return 1;
1494 }
1495
1496 /* Now try to post the command packet */
1497 tw_post_command_packet(tw_dev, request_id);
1498
1499 return 0;
1500 } /* End tw_scsiop_inquiry() */
1501
1502 /* This function is called by the isr to complete an inquiry command */
1503 static int tw_scsiop_inquiry_complete(TW_Device_Extension *tw_dev, int request_id)
1504 {
1505 unsigned char *is_unit_present;
1506 unsigned char *request_buffer;
1507 TW_Param *param;
1508
1509 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry_complete()\n");
1510
1511 /* Fill request buffer */
1512 if (tw_dev->srb[request_id]->request_buffer == NULL) {
1513 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry_complete(): Request buffer NULL.\n");
1514 return 1;
1515 }
1516 request_buffer = tw_dev->srb[request_id]->request_buffer;
1517 memset(request_buffer, 0, tw_dev->srb[request_id]->request_bufflen);
1518 request_buffer[0] = TYPE_DISK; /* Peripheral device type */
1519 request_buffer[1] = 0; /* Device type modifier */
1520 request_buffer[2] = 0; /* No ansi/iso compliance */
1521 request_buffer[4] = 31; /* Additional length */
1522 memcpy(&request_buffer[8], "3ware ", 8); /* Vendor ID */
1523 sprintf(&request_buffer[16], "Logical Disk %-2d ", tw_dev->srb[request_id]->device->id);
1524 memcpy(&request_buffer[32], TW_DRIVER_VERSION, 3);
1525
1526 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1527 if (param == NULL) {
1528 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry_complete(): Bad alignment virtual address.\n");
1529 return 1;
1530 }
1531 is_unit_present = &(param->data[0]);
1532
1533 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1534 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1535 } else {
1536 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1537 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1538 return TW_ISR_DONT_RESULT;
1539 }
1540
1541 return 0;
1542 } /* End tw_scsiop_inquiry_complete() */
1543
1544 /* This function handles scsi mode_sense commands */
1545 static int tw_scsiop_mode_sense(TW_Device_Extension *tw_dev, int request_id)
1546 {
1547 TW_Param *param;
1548 TW_Command *command_packet;
1549 unsigned long command_que_value;
1550 unsigned long param_value;
1551
1552 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense()\n");
1553
1554 /* Only page control = 0, page code = 0x8 (cache page) supported */
1555 if (tw_dev->srb[request_id]->cmnd[2] != 0x8) {
1556 tw_dev->state[request_id] = TW_S_COMPLETED;
1557 tw_state_request_finish(tw_dev, request_id);
1558 tw_dev->srb[request_id]->result = (DID_OK << 16);
1559 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1560 return 0;
1561 }
1562
1563 /* Now read firmware cache setting for this unit */
1564 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1565 if (command_packet == NULL) {
1566 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet virtual address.\n");
1567 return 1;
1568 }
1569
1570 /* Setup the command packet */
1571 memset(command_packet, 0, sizeof(TW_Sector));
1572 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1573 command_packet->size = 4;
1574 command_packet->request_id = request_id;
1575 command_packet->status = 0;
1576 command_packet->flags = 0;
1577 command_packet->byte6.parameter_count = 1;
1578
1579 /* Setup the param */
1580 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1581 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment virtual address.\n");
1582 return 1;
1583 }
1584
1585 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1586 memset(param, 0, sizeof(TW_Sector));
1587 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE + tw_dev->srb[request_id]->device->id;
1588 param->parameter_id = 7; /* unit flags */
1589 param->parameter_size_bytes = 1;
1590 param_value = tw_dev->alignment_physical_address[request_id];
1591 if (param_value == 0) {
1592 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment physical address.\n");
1593 return 1;
1594 }
1595
1596 command_packet->byte8.param.sgl[0].address = param_value;
1597 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1598 command_que_value = tw_dev->command_packet_physical_address[request_id];
1599 if (command_que_value == 0) {
1600 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet physical address.\n");
1601 return 1;
1602 }
1603
1604 /* Now try to post the command packet */
1605 tw_post_command_packet(tw_dev, request_id);
1606
1607 return 0;
1608 } /* End tw_scsiop_mode_sense() */
1609
1610 /* This function is called by the isr to complete a mode sense command */
1611 static int tw_scsiop_mode_sense_complete(TW_Device_Extension *tw_dev, int request_id)
1612 {
1613 TW_Param *param;
1614 unsigned char *flags;
1615 unsigned char *request_buffer;
1616
1617 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense_complete()\n");
1618
1619 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1620 if (param == NULL) {
1621 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense_complete(): Bad alignment virtual address.\n");
1622 return 1;
1623 }
1624 flags = (char *)&(param->data[0]);
1625 request_buffer = tw_dev->srb[request_id]->buffer;
1626 memset(request_buffer, 0, tw_dev->srb[request_id]->request_bufflen);
1627
1628 request_buffer[0] = 0xf; /* mode data length */
1629 request_buffer[1] = 0; /* default medium type */
1630 request_buffer[2] = 0x10; /* dpo/fua support on */
1631 request_buffer[3] = 0; /* no block descriptors */
1632 request_buffer[4] = 0x8; /* caching page */
1633 request_buffer[5] = 0xa; /* page length */
1634 if (*flags & 0x1)
1635 request_buffer[6] = 0x4; /* WCE on */
1636 else
1637 request_buffer[6] = 0x0; /* WCE off */
1638
1639 return 0;
1640 } /* End tw_scsiop_mode_sense_complete() */
1641
1642 /* This function handles scsi read_capacity commands */
1643 static int tw_scsiop_read_capacity(TW_Device_Extension *tw_dev, int request_id)
1644 {
1645 TW_Param *param;
1646 TW_Command *command_packet;
1647 unsigned long command_que_value;
1648 unsigned long param_value;
1649
1650 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity()\n");
1651
1652 /* Initialize command packet */
1653 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1654
1655 if (command_packet == NULL) {
1656 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet virtual address.\n");
1657 return 1;
1658 }
1659 memset(command_packet, 0, sizeof(TW_Sector));
1660 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1661 command_packet->size = 4;
1662 command_packet->request_id = request_id;
1663 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1664 command_packet->status = 0;
1665 command_packet->flags = 0;
1666 command_packet->byte6.block_count = 1;
1667
1668 /* Now setup the param */
1669 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1670 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment virtual address.\n");
1671 return 1;
1672 }
1673 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1674 memset(param, 0, sizeof(TW_Sector));
1675 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE +
1676 tw_dev->srb[request_id]->device->id;
1677 param->parameter_id = 4; /* unitcapacity parameter */
1678 param->parameter_size_bytes = 4;
1679 param_value = tw_dev->alignment_physical_address[request_id];
1680 if (param_value == 0) {
1681 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment physical address.\n");
1682 return 1;
1683 }
1684
1685 command_packet->byte8.param.sgl[0].address = param_value;
1686 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1687 command_que_value = tw_dev->command_packet_physical_address[request_id];
1688 if (command_que_value == 0) {
1689 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet physical address.\n");
1690 return 1;
1691 }
1692
1693 /* Now try to post the command to the board */
1694 tw_post_command_packet(tw_dev, request_id);
1695
1696 return 0;
1697 } /* End tw_scsiop_read_capacity() */
1698
1699 /* This function is called by the isr to complete a readcapacity command */
1700 static int tw_scsiop_read_capacity_complete(TW_Device_Extension *tw_dev, int request_id)
1701 {
1702 unsigned char *param_data;
1703 u32 capacity;
1704 char *buff;
1705 TW_Param *param;
1706
1707 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete()\n");
1708
1709 buff = tw_dev->srb[request_id]->request_buffer;
1710 if (buff == NULL) {
1711 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_capacity_complete(): Request buffer NULL.\n");
1712 return 1;
1713 }
1714 memset(buff, 0, tw_dev->srb[request_id]->request_bufflen);
1715 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1716 if (param == NULL) {
1717 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_capacity_complete(): Bad alignment virtual address.\n");
1718 return 1;
1719 }
1720 param_data = &(param->data[0]);
1721
1722 capacity = (param_data[3] << 24) | (param_data[2] << 16) |
1723 (param_data[1] << 8) | param_data[0];
1724
1725 /* Subtract one sector to fix get last sector ioctl */
1726 capacity -= 1;
1727
1728 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete(): Capacity = 0x%x.\n", capacity);
1729
1730 /* Number of LBA's */
1731 buff[0] = (capacity >> 24);
1732 buff[1] = (capacity >> 16) & 0xff;
1733 buff[2] = (capacity >> 8) & 0xff;
1734 buff[3] = capacity & 0xff;
1735
1736 /* Block size in bytes (512) */
1737 buff[4] = (TW_BLOCK_SIZE >> 24);
1738 buff[5] = (TW_BLOCK_SIZE >> 16) & 0xff;
1739 buff[6] = (TW_BLOCK_SIZE >> 8) & 0xff;
1740 buff[7] = TW_BLOCK_SIZE & 0xff;
1741
1742 return 0;
1743 } /* End tw_scsiop_read_capacity_complete() */
1744
1745 /* This function handles scsi read or write commands */
1746 static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id)
1747 {
1748 TW_Command *command_packet;
1749 unsigned long command_que_value;
1750 u32 lba = 0x0, num_sectors = 0x0, buffaddr = 0x0;
1751 int i, use_sg;
1752 struct scsi_cmnd *srb;
1753 struct scatterlist *sglist;
1754
1755 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write()\n");
1756
1757 if (tw_dev->srb[request_id]->request_buffer == NULL) {
1758 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Request buffer NULL.\n");
1759 return 1;
1760 }
1761 sglist = (struct scatterlist *)tw_dev->srb[request_id]->request_buffer;
1762 srb = tw_dev->srb[request_id];
1763
1764 /* Initialize command packet */
1765 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1766 if (command_packet == NULL) {
1767 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): Bad command packet virtual address.\n");
1768 return 1;
1769 }
1770
1771 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == READ_10) {
1772 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_READ);
1773 } else {
1774 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_WRITE);
1775 }
1776
1777 command_packet->size = 3;
1778 command_packet->request_id = request_id;
1779 command_packet->unit__hostid = TW_UNITHOST_IN(0, srb->device->id);
1780 command_packet->status = 0;
1781 command_packet->flags = 0;
1782
1783 if (srb->cmnd[0] == WRITE_10) {
1784 if ((srb->cmnd[1] & 0x8) || (srb->cmnd[1] & 0x10))
1785 command_packet->flags = 1;
1786 }
1787
1788 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6) {
1789 lba = ((u32)srb->cmnd[1] << 16) | ((u32)srb->cmnd[2] << 8) | (u32)srb->cmnd[3];
1790 num_sectors = (u32)srb->cmnd[4];
1791 } else {
1792 lba = ((u32)srb->cmnd[2] << 24) | ((u32)srb->cmnd[3] << 16) | ((u32)srb->cmnd[4] << 8) | (u32)srb->cmnd[5];
1793 num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
1794 }
1795
1796 /* Update sector statistic */
1797 tw_dev->sector_count = num_sectors;
1798 if (tw_dev->sector_count > tw_dev->max_sector_count)
1799 tw_dev->max_sector_count = tw_dev->sector_count;
1800
1801 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): lba = 0x%x num_sectors = 0x%x\n", lba, num_sectors);
1802 command_packet->byte8.io.lba = lba;
1803 command_packet->byte6.block_count = num_sectors;
1804
1805 /* Do this if there are no sg list entries */
1806 if (tw_dev->srb[request_id]->use_sg == 0) {
1807 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): SG = 0\n");
1808 buffaddr = tw_map_scsi_single_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
1809 if (buffaddr == 0)
1810 return 1;
1811
1812 command_packet->byte8.io.sgl[0].address = buffaddr;
1813 command_packet->byte8.io.sgl[0].length = tw_dev->srb[request_id]->request_bufflen;
1814 command_packet->size+=2;
1815 }
1816
1817 /* Do this if we have multiple sg list entries */
1818 if (tw_dev->srb[request_id]->use_sg > 0) {
1819 use_sg = tw_map_scsi_sg_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
1820 if (use_sg == 0)
1821 return 1;
1822
1823 for (i=0;i<use_sg; i++) {
1824 command_packet->byte8.io.sgl[i].address = sg_dma_address(&sglist[i]);
1825 command_packet->byte8.io.sgl[i].length = sg_dma_len(&sglist[i]);
1826 command_packet->size+=2;
1827 }
1828 }
1829
1830 /* Update SG statistics */
1831 tw_dev->sgl_entries = tw_dev->srb[request_id]->use_sg;
1832 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
1833 tw_dev->max_sgl_entries = tw_dev->sgl_entries;
1834
1835 command_que_value = tw_dev->command_packet_physical_address[request_id];
1836 if (command_que_value == 0) {
1837 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Bad command packet physical address.\n");
1838 return 1;
1839 }
1840
1841 /* Now try to post the command to the board */
1842 tw_post_command_packet(tw_dev, request_id);
1843
1844 return 0;
1845 } /* End tw_scsiop_read_write() */
1846
1847 /* This function will handle the request sense scsi command */
1848 static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id)
1849 {
1850 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n");
1851
1852 /* For now we just zero the request buffer */
1853 memset(tw_dev->srb[request_id]->request_buffer, 0, tw_dev->srb[request_id]->request_bufflen);
1854 tw_dev->state[request_id] = TW_S_COMPLETED;
1855 tw_state_request_finish(tw_dev, request_id);
1856
1857 /* If we got a request_sense, we probably want a reset, return error */
1858 tw_dev->srb[request_id]->result = (DID_ERROR << 16);
1859 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1860
1861 return 0;
1862 } /* End tw_scsiop_request_sense() */
1863
1864 /* This function will handle synchronize cache scsi command */
1865 static int tw_scsiop_synchronize_cache(TW_Device_Extension *tw_dev, int request_id)
1866 {
1867 TW_Command *command_packet;
1868 unsigned long command_que_value;
1869
1870 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_synchronize_cache()\n");
1871
1872 /* Send firmware flush command for this unit */
1873 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1874 if (command_packet == NULL) {
1875 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet virtual address.\n");
1876 return 1;
1877 }
1878
1879 /* Setup the command packet */
1880 memset(command_packet, 0, sizeof(TW_Sector));
1881 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_FLUSH_CACHE);
1882 command_packet->size = 2;
1883 command_packet->request_id = request_id;
1884 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
1885 command_packet->status = 0;
1886 command_packet->flags = 0;
1887 command_packet->byte6.parameter_count = 1;
1888 command_que_value = tw_dev->command_packet_physical_address[request_id];
1889 if (command_que_value == 0) {
1890 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet physical address.\n");
1891 return 1;
1892 }
1893
1894 /* Now try to post the command packet */
1895 tw_post_command_packet(tw_dev, request_id);
1896
1897 return 0;
1898 } /* End tw_scsiop_synchronize_cache() */
1899
1900 /* This function will handle test unit ready scsi command */
1901 static int tw_scsiop_test_unit_ready(TW_Device_Extension *tw_dev, int request_id)
1902 {
1903 TW_Param *param;
1904 TW_Command *command_packet;
1905 unsigned long command_que_value;
1906 unsigned long param_value;
1907
1908 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_test_unit_ready()\n");
1909
1910 /* Initialize command packet */
1911 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
1912 if (command_packet == NULL) {
1913 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet virtual address.\n");
1914 return 1;
1915 }
1916 memset(command_packet, 0, sizeof(TW_Sector));
1917 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1918 command_packet->size = 4;
1919 command_packet->request_id = request_id;
1920 command_packet->status = 0;
1921 command_packet->flags = 0;
1922 command_packet->byte6.parameter_count = 1;
1923
1924 /* Now setup the param */
1925 if (tw_dev->alignment_virtual_address[request_id] == NULL) {
1926 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment virtual address.\n");
1927 return 1;
1928 }
1929 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1930 memset(param, 0, sizeof(TW_Sector));
1931 param->table_id = 3; /* unit summary table */
1932 param->parameter_id = 3; /* unitsstatus parameter */
1933 param->parameter_size_bytes = TW_MAX_UNITS;
1934 param_value = tw_dev->alignment_physical_address[request_id];
1935 if (param_value == 0) {
1936 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment physical address.\n");
1937 return 1;
1938 }
1939
1940 command_packet->byte8.param.sgl[0].address = param_value;
1941 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
1942 command_que_value = tw_dev->command_packet_physical_address[request_id];
1943 if (command_que_value == 0) {
1944 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet physical address.\n");
1945 return 1;
1946 }
1947
1948 /* Now try to post the command packet */
1949 tw_post_command_packet(tw_dev, request_id);
1950
1951 return 0;
1952 } /* End tw_scsiop_test_unit_ready() */
1953
1954 /* This function is called by the isr to complete a testunitready command */
1955 static int tw_scsiop_test_unit_ready_complete(TW_Device_Extension *tw_dev, int request_id)
1956 {
1957 unsigned char *is_unit_present;
1958 TW_Param *param;
1959
1960 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete()\n");
1961
1962 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
1963 if (param == NULL) {
1964 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete(): Bad alignment virtual address.\n");
1965 return 1;
1966 }
1967 is_unit_present = &(param->data[0]);
1968
1969 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
1970 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
1971 } else {
1972 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
1973 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
1974 return TW_ISR_DONT_RESULT;
1975 }
1976
1977 return 0;
1978 } /* End tw_scsiop_test_unit_ready_complete() */
1979
1980 /* This is the main scsi queue function to handle scsi opcodes */
1981 static int tw_scsi_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
1982 {
1983 unsigned char *command = SCpnt->cmnd;
1984 int request_id = 0;
1985 int retval = 1;
1986 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1987
1988 /* Save done function into Scsi_Cmnd struct */
1989 SCpnt->scsi_done = done;
1990
1991 /* Queue the command and get a request id */
1992 tw_state_request_start(tw_dev, &request_id);
1993
1994 /* Save the scsi command for use by the ISR */
1995 tw_dev->srb[request_id] = SCpnt;
1996
1997 /* Initialize phase to zero */
1998 SCpnt->SCp.phase = TW_PHASE_INITIAL;
1999
2000 switch (*command) {
2001 case READ_10:
2002 case READ_6:
2003 case WRITE_10:
2004 case WRITE_6:
2005 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ/WRITE.\n");
2006 retval = tw_scsiop_read_write(tw_dev, request_id);
2007 break;
2008 case TEST_UNIT_READY:
2009 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught TEST_UNIT_READY.\n");
2010 retval = tw_scsiop_test_unit_ready(tw_dev, request_id);
2011 break;
2012 case INQUIRY:
2013 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught INQUIRY.\n");
2014 retval = tw_scsiop_inquiry(tw_dev, request_id);
2015 break;
2016 case READ_CAPACITY:
2017 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ_CAPACITY.\n");
2018 retval = tw_scsiop_read_capacity(tw_dev, request_id);
2019 break;
2020 case REQUEST_SENSE:
2021 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught REQUEST_SENSE.\n");
2022 retval = tw_scsiop_request_sense(tw_dev, request_id);
2023 break;
2024 case MODE_SENSE:
2025 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught MODE_SENSE.\n");
2026 retval = tw_scsiop_mode_sense(tw_dev, request_id);
2027 break;
2028 case SYNCHRONIZE_CACHE:
2029 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught SYNCHRONIZE_CACHE.\n");
2030 retval = tw_scsiop_synchronize_cache(tw_dev, request_id);
2031 break;
2032 case TW_IOCTL:
2033 printk(KERN_WARNING "3w-xxxx: SCSI_IOCTL_SEND_COMMAND deprecated, please update your 3ware tools.\n");
2034 break;
2035 default:
2036 printk(KERN_NOTICE "3w-xxxx: scsi%d: Unknown scsi opcode: 0x%x\n", tw_dev->host->host_no, *command);
2037 tw_dev->state[request_id] = TW_S_COMPLETED;
2038 tw_state_request_finish(tw_dev, request_id);
2039 SCpnt->result = (DID_BAD_TARGET << 16);
2040 done(SCpnt);
2041 retval = 0;
2042 }
2043 if (retval) {
2044 tw_dev->state[request_id] = TW_S_COMPLETED;
2045 tw_state_request_finish(tw_dev, request_id);
2046 SCpnt->result = (DID_ERROR << 16);
2047 done(SCpnt);
2048 retval = 0;
2049 }
2050 return retval;
2051 } /* End tw_scsi_queue() */
2052
2053 /* This function is the interrupt service routine */
2054 static irqreturn_t tw_interrupt(int irq, void *dev_instance,
2055 struct pt_regs *regs)
2056 {
2057 int request_id;
2058 u32 status_reg_value;
2059 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
2060 TW_Response_Queue response_que;
2061 int error = 0, retval = 0;
2062 TW_Command *command_packet;
2063 int handled = 0;
2064
2065 /* Get the host lock for io completions */
2066 spin_lock(tw_dev->host->host_lock);
2067
2068 /* Read the registers */
2069 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2070
2071 /* Check if this is our interrupt, otherwise bail */
2072 if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
2073 goto tw_interrupt_bail;
2074
2075 handled = 1;
2076
2077 /* Check controller for errors */
2078 if (tw_check_bits(status_reg_value)) {
2079 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2080 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2081 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2082 goto tw_interrupt_bail;
2083 }
2084 }
2085
2086 /* Handle host interrupt */
2087 if (status_reg_value & TW_STATUS_HOST_INTERRUPT) {
2088 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received host interrupt.\n");
2089 TW_CLEAR_HOST_INTERRUPT(tw_dev);
2090 }
2091
2092 /* Handle attention interrupt */
2093 if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
2094 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received attention interrupt.\n");
2095 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
2096 tw_state_request_start(tw_dev, &request_id);
2097 error = tw_aen_read_queue(tw_dev, request_id);
2098 if (error) {
2099 printk(KERN_WARNING "3w-xxxx: scsi%d: Error reading aen queue.\n", tw_dev->host->host_no);
2100 tw_dev->state[request_id] = TW_S_COMPLETED;
2101 tw_state_request_finish(tw_dev, request_id);
2102 }
2103 }
2104
2105 /* Handle command interrupt */
2106 if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
2107 /* Drain as many pending commands as we can */
2108 while (tw_dev->pending_request_count > 0) {
2109 request_id = tw_dev->pending_queue[tw_dev->pending_head];
2110 if (tw_dev->state[request_id] != TW_S_PENDING) {
2111 printk(KERN_WARNING "3w-xxxx: scsi%d: Found request id that wasn't pending.\n", tw_dev->host->host_no);
2112 break;
2113 }
2114 if (tw_post_command_packet(tw_dev, request_id)==0) {
2115 if (tw_dev->pending_head == TW_Q_LENGTH-1) {
2116 tw_dev->pending_head = TW_Q_START;
2117 } else {
2118 tw_dev->pending_head = tw_dev->pending_head + 1;
2119 }
2120 tw_dev->pending_request_count--;
2121 } else {
2122 /* If we get here, we will continue re-posting on the next command interrupt */
2123 break;
2124 }
2125 }
2126 /* If there are no more pending requests, we mask command interrupt */
2127 if (tw_dev->pending_request_count == 0)
2128 TW_MASK_COMMAND_INTERRUPT(tw_dev);
2129 }
2130
2131 /* Handle response interrupt */
2132 if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
2133 /* Drain the response queue from the board */
2134 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
2135 /* Read response queue register */
2136 response_que.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
2137 request_id = TW_RESID_OUT(response_que.response_id);
2138 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
2139 error = 0;
2140
2141 /* Check for bad response */
2142 if (command_packet->status != 0) {
2143 /* If internal command, don't error, don't fill sense */
2144 if (tw_dev->srb[request_id] == NULL) {
2145 tw_decode_sense(tw_dev, request_id, 0);
2146 } else {
2147 error = tw_decode_sense(tw_dev, request_id, 1);
2148 }
2149 }
2150
2151 /* Check for correct state */
2152 if (tw_dev->state[request_id] != TW_S_POSTED) {
2153 if (tw_dev->srb[request_id] != NULL) {
2154 printk(KERN_WARNING "3w-xxxx: scsi%d: Received a request id that wasn't posted.\n", tw_dev->host->host_no);
2155 error = 1;
2156 }
2157 }
2158
2159 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Response queue request id: %d.\n", request_id);
2160
2161 /* Check for internal command completion */
2162 if (tw_dev->srb[request_id] == NULL) {
2163 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Found internally posted command.\n");
2164 /* Check for chrdev ioctl completion */
2165 if (request_id != tw_dev->chrdev_request_id) {
2166 retval = tw_aen_complete(tw_dev, request_id);
2167 if (retval) {
2168 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing aen.\n", tw_dev->host->host_no);
2169 }
2170 } else {
2171 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
2172 wake_up(&tw_dev->ioctl_wqueue);
2173 }
2174 } else {
2175 switch (tw_dev->srb[request_id]->cmnd[0]) {
2176 case READ_10:
2177 case READ_6:
2178 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_10/READ_6\n");
2179 break;
2180 case WRITE_10:
2181 case WRITE_6:
2182 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught WRITE_10/WRITE_6\n");
2183 break;
2184 case TEST_UNIT_READY:
2185 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught TEST_UNIT_READY\n");
2186 error = tw_scsiop_test_unit_ready_complete(tw_dev, request_id);
2187 break;
2188 case INQUIRY:
2189 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught INQUIRY\n");
2190 error = tw_scsiop_inquiry_complete(tw_dev, request_id);
2191 break;
2192 case READ_CAPACITY:
2193 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_CAPACITY\n");
2194 error = tw_scsiop_read_capacity_complete(tw_dev, request_id);
2195 break;
2196 case MODE_SENSE:
2197 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught MODE_SENSE\n");
2198 error = tw_scsiop_mode_sense_complete(tw_dev, request_id);
2199 break;
2200 case SYNCHRONIZE_CACHE:
2201 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught SYNCHRONIZE_CACHE\n");
2202 break;
2203 default:
2204 printk(KERN_WARNING "3w-xxxx: case slip in tw_interrupt()\n");
2205 error = 1;
2206 }
2207
2208 /* If no error command was a success */
2209 if (error == 0) {
2210 tw_dev->srb[request_id]->result = (DID_OK << 16);
2211 }
2212
2213 /* If error, command failed */
2214 if (error == 1) {
2215 /* Ask for a host reset */
2216 tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
2217 }
2218
2219 /* Now complete the io */
2220 if ((error != TW_ISR_DONT_COMPLETE)) {
2221 tw_dev->state[request_id] = TW_S_COMPLETED;
2222 tw_state_request_finish(tw_dev, request_id);
2223 tw_dev->posted_request_count--;
2224 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
2225
2226 tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);
2227 }
2228 }
2229
2230 /* Check for valid status after each drain */
2231 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
2232 if (tw_check_bits(status_reg_value)) {
2233 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
2234 if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
2235 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2236 goto tw_interrupt_bail;
2237 }
2238 }
2239 }
2240 }
2241
2242 tw_interrupt_bail:
2243 spin_unlock(tw_dev->host->host_lock);
2244 return IRQ_RETVAL(handled);
2245 } /* End tw_interrupt() */
2246
2247 /* This function tells the controller to shut down */
2248 static void __tw_shutdown(TW_Device_Extension *tw_dev)
2249 {
2250 /* Disable interrupts */
2251 TW_DISABLE_INTERRUPTS(tw_dev);
2252
2253 printk(KERN_WARNING "3w-xxxx: Shutting down host %d.\n", tw_dev->host->host_no);
2254
2255 /* Tell the card we are shutting down */
2256 if (tw_initconnection(tw_dev, 1)) {
2257 printk(KERN_WARNING "3w-xxxx: Connection shutdown failed.\n");
2258 } else {
2259 printk(KERN_WARNING "3w-xxxx: Shutdown complete.\n");
2260 }
2261
2262 /* Clear all interrupts just before exit */
2263 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2264 } /* End __tw_shutdown() */
2265
2266 /* Wrapper for __tw_shutdown */
2267 static void tw_shutdown(struct device *dev)
2268 {
2269 struct Scsi_Host *host = pci_get_drvdata(to_pci_dev(dev));
2270 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2271
2272 __tw_shutdown(tw_dev);
2273 } /* End tw_shutdown() */
2274
2275 static struct scsi_host_template driver_template = {
2276 .module = THIS_MODULE,
2277 .name = "3ware Storage Controller",
2278 .queuecommand = tw_scsi_queue,
2279 .eh_host_reset_handler = tw_scsi_eh_reset,
2280 .bios_param = tw_scsi_biosparam,
2281 .change_queue_depth = tw_change_queue_depth,
2282 .can_queue = TW_Q_LENGTH-2,
2283 .this_id = -1,
2284 .sg_tablesize = TW_MAX_SGL_LENGTH,
2285 .max_sectors = TW_MAX_SECTORS,
2286 .cmd_per_lun = TW_MAX_CMDS_PER_LUN,
2287 .use_clustering = ENABLE_CLUSTERING,
2288 .shost_attrs = tw_host_attrs,
2289 .emulated = 1
2290 };
2291
2292 /* This function will probe and initialize a card */
2293 static int __devinit tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
2294 {
2295 struct Scsi_Host *host = NULL;
2296 TW_Device_Extension *tw_dev;
2297 int retval = -ENODEV;
2298
2299 retval = pci_enable_device(pdev);
2300 if (retval) {
2301 printk(KERN_WARNING "3w-xxxx: Failed to enable pci device.");
2302 goto out_disable_device;
2303 }
2304
2305 pci_set_master(pdev);
2306
2307 retval = pci_set_dma_mask(pdev, TW_DMA_MASK);
2308 if (retval) {
2309 printk(KERN_WARNING "3w-xxxx: Failed to set dma mask.");
2310 goto out_disable_device;
2311 }
2312
2313 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2314 if (!host) {
2315 printk(KERN_WARNING "3w-xxxx: Failed to allocate memory for device extension.");
2316 retval = -ENOMEM;
2317 goto out_disable_device;
2318 }
2319 tw_dev = (TW_Device_Extension *)host->hostdata;
2320
2321 memset(tw_dev, 0, sizeof(TW_Device_Extension));
2322
2323 /* Save values to device extension */
2324 tw_dev->host = host;
2325 tw_dev->tw_pci_dev = pdev;
2326
2327 if (tw_initialize_device_extension(tw_dev)) {
2328 printk(KERN_WARNING "3w-xxxx: Failed to initialize device extension.");
2329 goto out_free_device_extension;
2330 }
2331
2332 /* Request IO regions */
2333 retval = pci_request_regions(pdev, "3w-xxxx");
2334 if (retval) {
2335 printk(KERN_WARNING "3w-xxxx: Failed to get mem region.");
2336 goto out_free_device_extension;
2337 }
2338
2339 /* Save base address */
2340 tw_dev->base_addr = pci_resource_start(pdev, 0);
2341 if (!tw_dev->base_addr) {
2342 printk(KERN_WARNING "3w-xxxx: Failed to get io address.");
2343 goto out_release_mem_region;
2344 }
2345
2346 /* Disable interrupts on the card */
2347 TW_DISABLE_INTERRUPTS(tw_dev);
2348
2349 /* Initialize the card */
2350 if (tw_reset_sequence(tw_dev))
2351 goto out_release_mem_region;
2352
2353 /* Set host specific parameters */
2354 host->max_id = TW_MAX_UNITS;
2355 host->max_cmd_len = TW_MAX_CDB_LEN;
2356
2357 /* Luns and channels aren't supported by adapter */
2358 host->max_lun = 0;
2359 host->max_channel = 0;
2360
2361 /* Register the card with the kernel SCSI layer */
2362 retval = scsi_add_host(host, &pdev->dev);
2363 if (retval) {
2364 printk(KERN_WARNING "3w-xxxx: scsi add host failed");
2365 goto out_release_mem_region;
2366 }
2367
2368 pci_set_drvdata(pdev, host);
2369
2370 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);
2371
2372 /* Now setup the interrupt handler */
2373 retval = request_irq(pdev->irq, tw_interrupt, SA_SHIRQ, "3w-xxxx", tw_dev);
2374 if (retval) {
2375 printk(KERN_WARNING "3w-xxxx: Error requesting IRQ.");
2376 goto out_remove_host;
2377 }
2378
2379 tw_device_extension_list[tw_device_extension_count] = tw_dev;
2380 tw_device_extension_count++;
2381
2382 /* Re-enable interrupts on the card */
2383 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2384
2385 /* Finally, scan the host */
2386 scsi_scan_host(host);
2387
2388 if (twe_major == -1) {
2389 if ((twe_major = register_chrdev (0, "twe", &tw_fops)) < 0)
2390 printk(KERN_WARNING "3w-xxxx: Failed to register character device.");
2391 }
2392 return 0;
2393
2394 out_remove_host:
2395 scsi_remove_host(host);
2396 out_release_mem_region:
2397 pci_release_regions(pdev);
2398 out_free_device_extension:
2399 tw_free_device_extension(tw_dev);
2400 scsi_host_put(host);
2401 out_disable_device:
2402 pci_disable_device(pdev);
2403
2404 return retval;
2405 } /* End tw_probe() */
2406
2407 /* This function is called to remove a device */
2408 static void tw_remove(struct pci_dev *pdev)
2409 {
2410 struct Scsi_Host *host = pci_get_drvdata(pdev);
2411 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2412
2413 scsi_remove_host(tw_dev->host);
2414
2415 /* Unregister character device */
2416 if (twe_major >= 0) {
2417 unregister_chrdev(twe_major, "twe");
2418 twe_major = -1;
2419 }
2420
2421 /* Free up the IRQ */
2422 free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
2423
2424 /* Shutdown the card */
2425 __tw_shutdown(tw_dev);
2426
2427 /* Free up the mem region */
2428 pci_release_regions(pdev);
2429
2430 /* Free up device extension resources */
2431 tw_free_device_extension(tw_dev);
2432
2433 scsi_host_put(tw_dev->host);
2434 pci_disable_device(pdev);
2435 tw_device_extension_count--;
2436 } /* End tw_remove() */
2437
2438 /* PCI Devices supported by this driver */
2439 static struct pci_device_id tw_pci_tbl[] __devinitdata = {
2440 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_1000,
2441 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2442 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_7000,
2443 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2444 { }
2445 };
2446 MODULE_DEVICE_TABLE(pci, tw_pci_tbl);
2447
2448 /* pci_driver initializer */
2449 static struct pci_driver tw_driver = {
2450 .name = "3w-xxxx",
2451 .id_table = tw_pci_tbl,
2452 .probe = tw_probe,
2453 .remove = tw_remove,
2454 .driver = {
2455 .shutdown = tw_shutdown
2456 }
2457 };
2458
2459 /* This function is called on driver initialization */
2460 static int __init tw_init(void)
2461 {
2462 printk(KERN_WARNING "3ware Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2463
2464 return pci_module_init(&tw_driver);
2465 } /* End tw_init() */
2466
2467 /* This function is called on driver exit */
2468 static void __exit tw_exit(void)
2469 {
2470 pci_unregister_driver(&tw_driver);
2471 } /* End tw_exit() */
2472
2473 module_init(tw_init);
2474 module_exit(tw_exit);
2475
Support for the Chinese Samsung S3C2440 based development boards