1 /* 2 3w-xxxx.c -- 3ware Storage Controller device driver for Linux. 3 4 Written By: Adam Radford <aradford@gmail.com> 5 Modifications By: Joel Jacobson <linux@3ware.com> 6 Arnaldo Carvalho de Melo <acme@conectiva.com.br> 7 Brad Strand <linux@3ware.com> 8 9 Copyright (C) 1999-2010 3ware Inc. 10 11 Kernel compatibility By: Andre Hedrick <andre@suse.com> 12 Non-Copyright (C) 2000 Andre Hedrick <andre@suse.com> 13 14 Further tiny build fixes and trivial hoovering Alan Cox 15 16 This program is free software; you can redistribute it and/or modify 17 it under the terms of the GNU General Public License as published by 18 the Free Software Foundation; version 2 of the License. 19 20 This program is distributed in the hope that it will be useful, 21 but WITHOUT ANY WARRANTY; without even the implied warranty of 22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 GNU General Public License for more details. 24 25 NO WARRANTY 26 THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR 27 CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT 28 LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, 29 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is 30 solely responsible for determining the appropriateness of using and 31 distributing the Program and assumes all risks associated with its 32 exercise of rights under this Agreement, including but not limited to 33 the risks and costs of program errors, damage to or loss of data, 34 programs or equipment, and unavailability or interruption of operations. 35 36 DISCLAIMER OF LIABILITY 37 NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY 38 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 39 DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND 40 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 41 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 42 USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED 43 HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES 44 45 You should have received a copy of the GNU General Public License 46 along with this program; if not, write to the Free Software 47 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 48 49 Bugs/Comments/Suggestions should be mailed to: 50 51 aradford@gmail.com 52 53 54 History 55 ------- 56 0.1.000 - Initial release. 57 0.4.000 - Added support for Asynchronous Event Notification through 58 ioctls for 3DM. 59 1.0.000 - Added DPO & FUA bit support for WRITE_10 & WRITE_6 cdb 60 to disable drive write-cache before writes. 61 1.1.000 - Fixed performance bug with DPO & FUA not existing for WRITE_6. 62 1.2.000 - Added support for clean shutdown notification/feature table. 63 1.02.00.001 - Added support for full command packet posts through ioctls 64 for 3DM. 65 Bug fix so hot spare drives don't show up. 66 1.02.00.002 - Fix bug with tw_setfeature() call that caused oops on some 67 systems. 68 08/21/00 - release previously allocated resources on failure at 69 tw_allocate_memory (acme) 70 1.02.00.003 - Fix tw_interrupt() to report error to scsi layer when 71 controller status is non-zero. 72 Added handling of request_sense opcode. 73 Fix possible null pointer dereference in 74 tw_reset_device_extension() 75 1.02.00.004 - Add support for device id of 3ware 7000 series controllers. 76 Make tw_setfeature() call with interrupts disabled. 77 Register interrupt handler before enabling interrupts. 78 Clear attention interrupt before draining aen queue. 79 1.02.00.005 - Allocate bounce buffers and custom queue depth for raid5 for 80 6000 and 5000 series controllers. 81 Reduce polling mdelays causing problems on some systems. 82 Fix use_sg = 1 calculation bug. 83 Check for scsi_register returning NULL. 84 Add aen count to /proc/scsi/3w-xxxx. 85 Remove aen code unit masking in tw_aen_complete(). 86 1.02.00.006 - Remove unit from printk in tw_scsi_eh_abort(), causing 87 possible oops. 88 Fix possible null pointer dereference in tw_scsi_queue() 89 if done function pointer was invalid. 90 1.02.00.007 - Fix possible null pointer dereferences in tw_ioctl(). 91 Remove check for invalid done function pointer from 92 tw_scsi_queue(). 93 1.02.00.008 - Set max sectors per io to TW_MAX_SECTORS in tw_findcards(). 94 Add tw_decode_error() for printing readable error messages. 95 Print some useful information on certain aen codes. 96 Add tw_decode_bits() for interpreting status register output. 97 Make scsi_set_pci_device() for kernels >= 2.4.4 98 Fix bug where aen's could be lost before a reset. 99 Re-add spinlocks in tw_scsi_detect(). 100 Fix possible null pointer dereference in tw_aen_drain_queue() 101 during initialization. 102 Clear pci parity errors during initialization and during io. 103 1.02.00.009 - Remove redundant increment in tw_state_request_start(). 104 Add ioctl support for direct ATA command passthru. 105 Add entire aen code string list. 106 1.02.00.010 - Cleanup queueing code, fix jbod thoughput. 107 Fix get_param for specific units. 108 1.02.00.011 - Fix bug in tw_aen_complete() where aen's could be lost. 109 Fix tw_aen_drain_queue() to display useful info at init. 110 Set tw_host->max_id for 12 port cards. 111 Add ioctl support for raw command packet post from userspace 112 with sglist fragments (parameter and io). 113 1.02.00.012 - Fix read capacity to under report by 1 sector to fix get 114 last sector ioctl. 115 1.02.00.013 - Fix bug where more AEN codes weren't coming out during 116 driver initialization. 117 Improved handling of PCI aborts. 118 1.02.00.014 - Fix bug in tw_findcards() where AEN code could be lost. 119 Increase timeout in tw_aen_drain_queue() to 30 seconds. 120 1.02.00.015 - Re-write raw command post with data ioctl method. 121 Remove raid5 bounce buffers for raid5 for 6XXX for kernel 2.5 122 Add tw_map/unmap_scsi_sg/single_data() for kernel 2.5 123 Replace io_request_lock with host_lock for kernel 2.5 124 Set max_cmd_len to 16 for 3dm for kernel 2.5 125 1.02.00.016 - Set host->max_sectors back up to 256. 126 1.02.00.017 - Modified pci parity error handling/clearing from config space 127 during initialization. 128 1.02.00.018 - Better handling of request sense opcode and sense information 129 for failed commands. Add tw_decode_sense(). 130 Replace all mdelay()'s with scsi_sleep(). 131 1.02.00.019 - Revert mdelay's and scsi_sleep's, this caused problems on 132 some SMP systems. 133 1.02.00.020 - Add pci_set_dma_mask(), rewrite kmalloc()/virt_to_bus() to 134 pci_alloc/free_consistent(). 135 Better alignment checking in tw_allocate_memory(). 136 Cleanup tw_initialize_device_extension(). 137 1.02.00.021 - Bump cmd_per_lun in SHT to 255 for better jbod performance. 138 Improve handling of errors in tw_interrupt(). 139 Add handling/clearing of controller queue error. 140 Empty stale responses before draining aen queue. 141 Fix tw_scsi_eh_abort() to not reset on every io abort. 142 Set can_queue in SHT to 255 to prevent hang from AEN. 143 1.02.00.022 - Fix possible null pointer dereference in tw_scsi_release(). 144 1.02.00.023 - Fix bug in tw_aen_drain_queue() where unit # was always zero. 145 1.02.00.024 - Add severity levels to AEN strings. 146 1.02.00.025 - Fix command interrupt spurious error messages. 147 Fix bug in raw command post with data ioctl method. 148 Fix bug where rollcall sometimes failed with cable errors. 149 Print unit # on all command timeouts. 150 1.02.00.026 - Fix possible infinite retry bug with power glitch induced 151 drive timeouts. 152 Cleanup some AEN severity levels. 153 1.02.00.027 - Add drive not supported AEN code for SATA controllers. 154 Remove spurious unknown ioctl error message. 155 1.02.00.028 - Fix bug where multiple controllers with no units were the 156 same card number. 157 Fix bug where cards were being shut down more than once. 158 1.02.00.029 - Add missing pci_free_consistent() in tw_allocate_memory(). 159 Replace pci_map_single() with pci_map_page() for highmem. 160 Check for tw_setfeature() failure. 161 1.02.00.030 - Make driver 64-bit clean. 162 1.02.00.031 - Cleanup polling timeouts/routines in several places. 163 Add support for mode sense opcode. 164 Add support for cache mode page. 165 Add support for synchronize cache opcode. 166 1.02.00.032 - Fix small multicard rollcall bug. 167 Make driver stay loaded with no units for hot add/swap. 168 Add support for "twe" character device for ioctls. 169 Clean up request_id queueing code. 170 Fix tw_scsi_queue() spinlocks. 171 1.02.00.033 - Fix tw_aen_complete() to not queue 'queue empty' AEN's. 172 Initialize queues correctly when loading with no valid units. 173 1.02.00.034 - Fix tw_decode_bits() to handle multiple errors. 174 Add support for user configurable cmd_per_lun. 175 Add support for sht->slave_configure(). 176 1.02.00.035 - Improve tw_allocate_memory() memory allocation. 177 Fix tw_chrdev_ioctl() to sleep correctly. 178 1.02.00.036 - Increase character ioctl timeout to 60 seconds. 179 1.02.00.037 - Fix tw_ioctl() to handle all non-data ATA passthru cmds 180 for 'smartmontools' support. 181 1.26.00.038 - Roll driver minor version to 26 to denote kernel 2.6. 182 Add support for cmds_per_lun module parameter. 183 1.26.00.039 - Fix bug in tw_chrdev_ioctl() polling code. 184 Fix data_buffer_length usage in tw_chrdev_ioctl(). 185 Update contact information. 186 1.26.02.000 - Convert driver to pci_driver format. 187 1.26.02.001 - Increase max ioctl buffer size to 512 sectors. 188 Make tw_scsi_queue() return 0 for 'Unknown scsi opcode'. 189 Fix tw_remove() to free irq handler/unregister_chrdev() 190 before shutting down card. 191 Change to new 'change_queue_depth' api. 192 Fix 'handled=1' ISR usage, remove bogus IRQ check. 193 1.26.02.002 - Free irq handler in __tw_shutdown(). 194 Turn on RCD bit for caching mode page. 195 Serialize reset code. 196 1.26.02.003 - Force 60 second timeout default. 197 */ 198 199 #include <linux/module.h> 200 #include <linux/reboot.h> 201 #include <linux/spinlock.h> 202 #include <linux/interrupt.h> 203 #include <linux/moduleparam.h> 204 #include <linux/errno.h> 205 #include <linux/types.h> 206 #include <linux/delay.h> 207 #include <linux/gfp.h> 208 #include <linux/pci.h> 209 #include <linux/time.h> 210 #include <linux/mutex.h> 211 #include <asm/io.h> 212 #include <asm/irq.h> 213 #include <linux/uaccess.h> 214 #include <scsi/scsi.h> 215 #include <scsi/scsi_host.h> 216 #include <scsi/scsi_tcq.h> 217 #include <scsi/scsi_cmnd.h> 218 #include <scsi/scsi_eh.h> 219 #include "3w-xxxx.h" 220 221 /* Globals */ 222 #define TW_DRIVER_VERSION "1.26.02.003" 223 static DEFINE_MUTEX(tw_mutex); 224 static TW_Device_Extension *tw_device_extension_list[TW_MAX_SLOT]; 225 static int tw_device_extension_count = 0; 226 static int twe_major = -1; 227 228 /* Module parameters */ 229 MODULE_AUTHOR("LSI"); 230 MODULE_DESCRIPTION("3ware Storage Controller Linux Driver"); 231 MODULE_LICENSE("GPL"); 232 MODULE_VERSION(TW_DRIVER_VERSION); 233 234 /* Function prototypes */ 235 static int tw_reset_device_extension(TW_Device_Extension *tw_dev); 236 237 /* Functions */ 238 239 /* This function will check the status register for unexpected bits */ 240 static int tw_check_bits(u32 status_reg_value) 241 { 242 if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS) { 243 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): No expected bits (0x%x).\n", status_reg_value); 244 return 1; 245 } 246 if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0) { 247 dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): Found unexpected bits (0x%x).\n", status_reg_value); 248 return 1; 249 } 250 251 return 0; 252 } /* End tw_check_bits() */ 253 254 /* This function will print readable messages from status register errors */ 255 static int tw_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value, int print_host) 256 { 257 char host[16]; 258 259 dprintk(KERN_WARNING "3w-xxxx: tw_decode_bits()\n"); 260 261 if (print_host) 262 sprintf(host, " scsi%d:", tw_dev->host->host_no); 263 else 264 host[0] = '\0'; 265 266 if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) { 267 printk(KERN_WARNING "3w-xxxx:%s PCI Parity Error: clearing.\n", host); 268 outl(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev)); 269 } 270 271 if (status_reg_value & TW_STATUS_PCI_ABORT) { 272 printk(KERN_WARNING "3w-xxxx:%s PCI Abort: clearing.\n", host); 273 outl(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev)); 274 pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT); 275 } 276 277 if (status_reg_value & TW_STATUS_QUEUE_ERROR) { 278 printk(KERN_WARNING "3w-xxxx:%s Controller Queue Error: clearing.\n", host); 279 outl(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev)); 280 } 281 282 if (status_reg_value & TW_STATUS_SBUF_WRITE_ERROR) { 283 printk(KERN_WARNING "3w-xxxx:%s SBUF Write Error: clearing.\n", host); 284 outl(TW_CONTROL_CLEAR_SBUF_WRITE_ERROR, TW_CONTROL_REG_ADDR(tw_dev)); 285 } 286 287 if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) { 288 if (tw_dev->reset_print == 0) { 289 printk(KERN_WARNING "3w-xxxx:%s Microcontroller Error: clearing.\n", host); 290 tw_dev->reset_print = 1; 291 } 292 return 1; 293 } 294 295 return 0; 296 } /* End tw_decode_bits() */ 297 298 /* This function will poll the status register for a flag */ 299 static int tw_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds) 300 { 301 u32 status_reg_value; 302 unsigned long before; 303 int retval = 1; 304 305 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev)); 306 before = jiffies; 307 308 if (tw_check_bits(status_reg_value)) 309 tw_decode_bits(tw_dev, status_reg_value, 0); 310 311 while ((status_reg_value & flag) != flag) { 312 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev)); 313 314 if (tw_check_bits(status_reg_value)) 315 tw_decode_bits(tw_dev, status_reg_value, 0); 316 317 if (time_after(jiffies, before + HZ * seconds)) 318 goto out; 319 320 msleep(50); 321 } 322 retval = 0; 323 out: 324 return retval; 325 } /* End tw_poll_status() */ 326 327 /* This function will poll the status register for disappearance of a flag */ 328 static int tw_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds) 329 { 330 u32 status_reg_value; 331 unsigned long before; 332 int retval = 1; 333 334 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev)); 335 before = jiffies; 336 337 if (tw_check_bits(status_reg_value)) 338 tw_decode_bits(tw_dev, status_reg_value, 0); 339 340 while ((status_reg_value & flag) != 0) { 341 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev)); 342 343 if (tw_check_bits(status_reg_value)) 344 tw_decode_bits(tw_dev, status_reg_value, 0); 345 346 if (time_after(jiffies, before + HZ * seconds)) 347 goto out; 348 349 msleep(50); 350 } 351 retval = 0; 352 out: 353 return retval; 354 } /* End tw_poll_status_gone() */ 355 356 /* This function will attempt to post a command packet to the board */ 357 static int tw_post_command_packet(TW_Device_Extension *tw_dev, int request_id) 358 { 359 u32 status_reg_value; 360 unsigned long command_que_value; 361 362 dprintk(KERN_NOTICE "3w-xxxx: tw_post_command_packet()\n"); 363 command_que_value = tw_dev->command_packet_physical_address[request_id]; 364 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev)); 365 366 if (tw_check_bits(status_reg_value)) { 367 dprintk(KERN_WARNING "3w-xxxx: tw_post_command_packet(): Unexpected bits.\n"); 368 tw_decode_bits(tw_dev, status_reg_value, 1); 369 } 370 371 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) { 372 /* We successfully posted the command packet */ 373 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev)); 374 tw_dev->state[request_id] = TW_S_POSTED; 375 tw_dev->posted_request_count++; 376 if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) { 377 tw_dev->max_posted_request_count = tw_dev->posted_request_count; 378 } 379 } else { 380 /* Couldn't post the command packet, so we do it in the isr */ 381 if (tw_dev->state[request_id] != TW_S_PENDING) { 382 tw_dev->state[request_id] = TW_S_PENDING; 383 tw_dev->pending_request_count++; 384 if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) { 385 tw_dev->max_pending_request_count = tw_dev->pending_request_count; 386 } 387 tw_dev->pending_queue[tw_dev->pending_tail] = request_id; 388 if (tw_dev->pending_tail == TW_Q_LENGTH-1) { 389 tw_dev->pending_tail = TW_Q_START; 390 } else { 391 tw_dev->pending_tail = tw_dev->pending_tail + 1; 392 } 393 } 394 TW_UNMASK_COMMAND_INTERRUPT(tw_dev); 395 return 1; 396 } 397 return 0; 398 } /* End tw_post_command_packet() */ 399 400 /* This function will return valid sense buffer information for failed cmds */ 401 static int tw_decode_sense(TW_Device_Extension *tw_dev, int request_id, int fill_sense) 402 { 403 int i; 404 TW_Command *command; 405 406 dprintk(KERN_WARNING "3w-xxxx: tw_decode_sense()\n"); 407 command = (TW_Command *)tw_dev->command_packet_virtual_address[request_id]; 408 409 printk(KERN_WARNING "3w-xxxx: scsi%d: Command failed: status = 0x%x, flags = 0x%x, unit #%d.\n", tw_dev->host->host_no, command->status, command->flags, TW_UNIT_OUT(command->unit__hostid)); 410 411 /* Attempt to return intelligent sense information */ 412 if (fill_sense) { 413 if ((command->status == 0xc7) || (command->status == 0xcb)) { 414 for (i = 0; i < ARRAY_SIZE(tw_sense_table); i++) { 415 if (command->flags == tw_sense_table[i][0]) { 416 417 /* Valid bit and 'current errors' */ 418 tw_dev->srb[request_id]->sense_buffer[0] = (0x1 << 7 | 0x70); 419 420 /* Sense key */ 421 tw_dev->srb[request_id]->sense_buffer[2] = tw_sense_table[i][1]; 422 423 /* Additional sense length */ 424 tw_dev->srb[request_id]->sense_buffer[7] = 0xa; /* 10 bytes */ 425 426 /* Additional sense code */ 427 tw_dev->srb[request_id]->sense_buffer[12] = tw_sense_table[i][2]; 428 429 /* Additional sense code qualifier */ 430 tw_dev->srb[request_id]->sense_buffer[13] = tw_sense_table[i][3]; 431 432 tw_dev->srb[request_id]->result = (DID_OK << 16) | SAM_STAT_CHECK_CONDITION; 433 return TW_ISR_DONT_RESULT; /* Special case for isr to not over-write result */ 434 } 435 } 436 } 437 438 /* If no table match, error so we get a reset */ 439 return 1; 440 } 441 442 return 0; 443 } /* End tw_decode_sense() */ 444 445 /* This function will report controller error status */ 446 static int tw_check_errors(TW_Device_Extension *tw_dev) 447 { 448 u32 status_reg_value; 449 450 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev)); 451 452 if (TW_STATUS_ERRORS(status_reg_value) || tw_check_bits(status_reg_value)) { 453 tw_decode_bits(tw_dev, status_reg_value, 0); 454 return 1; 455 } 456 457 return 0; 458 } /* End tw_check_errors() */ 459 460 /* This function will empty the response que */ 461 static void tw_empty_response_que(TW_Device_Extension *tw_dev) 462 { 463 u32 status_reg_value; 464 465 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev)); 466 467 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) { 468 inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev)); 469 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev)); 470 } 471 } /* End tw_empty_response_que() */ 472 473 /* This function will free a request_id */ 474 static void tw_state_request_finish(TW_Device_Extension *tw_dev, int request_id) 475 { 476 tw_dev->free_queue[tw_dev->free_tail] = request_id; 477 tw_dev->state[request_id] = TW_S_FINISHED; 478 tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH; 479 } /* End tw_state_request_finish() */ 480 481 /* This function will assign an available request_id */ 482 static void tw_state_request_start(TW_Device_Extension *tw_dev, int *request_id) 483 { 484 *request_id = tw_dev->free_queue[tw_dev->free_head]; 485 tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH; 486 tw_dev->state[*request_id] = TW_S_STARTED; 487 } /* End tw_state_request_start() */ 488 489 /* Show some statistics about the card */ 490 static ssize_t tw_show_stats(struct device *dev, struct device_attribute *attr, 491 char *buf) 492 { 493 struct Scsi_Host *host = class_to_shost(dev); 494 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; 495 unsigned long flags = 0; 496 ssize_t len; 497 498 spin_lock_irqsave(tw_dev->host->host_lock, flags); 499 len = snprintf(buf, PAGE_SIZE, "3w-xxxx Driver version: %s\n" 500 "Current commands posted: %4d\n" 501 "Max commands posted: %4d\n" 502 "Current pending commands: %4d\n" 503 "Max pending commands: %4d\n" 504 "Last sgl length: %4d\n" 505 "Max sgl length: %4d\n" 506 "Last sector count: %4d\n" 507 "Max sector count: %4d\n" 508 "SCSI Host Resets: %4d\n" 509 "AEN's: %4d\n", 510 TW_DRIVER_VERSION, 511 tw_dev->posted_request_count, 512 tw_dev->max_posted_request_count, 513 tw_dev->pending_request_count, 514 tw_dev->max_pending_request_count, 515 tw_dev->sgl_entries, 516 tw_dev->max_sgl_entries, 517 tw_dev->sector_count, 518 tw_dev->max_sector_count, 519 tw_dev->num_resets, 520 tw_dev->aen_count); 521 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 522 return len; 523 } /* End tw_show_stats() */ 524 525 /* Create sysfs 'stats' entry */ 526 static struct device_attribute tw_host_stats_attr = { 527 .attr = { 528 .name = "stats", 529 .mode = S_IRUGO, 530 }, 531 .show = tw_show_stats 532 }; 533 534 /* Host attributes initializer */ 535 static struct device_attribute *tw_host_attrs[] = { 536 &tw_host_stats_attr, 537 NULL, 538 }; 539 540 /* This function will read the aen queue from the isr */ 541 static int tw_aen_read_queue(TW_Device_Extension *tw_dev, int request_id) 542 { 543 TW_Command *command_packet; 544 TW_Param *param; 545 unsigned long command_que_value; 546 u32 status_reg_value; 547 unsigned long param_value = 0; 548 549 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_read_queue()\n"); 550 551 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev)); 552 if (tw_check_bits(status_reg_value)) { 553 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Unexpected bits.\n"); 554 tw_decode_bits(tw_dev, status_reg_value, 1); 555 return 1; 556 } 557 if (tw_dev->command_packet_virtual_address[request_id] == NULL) { 558 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet virtual address.\n"); 559 return 1; 560 } 561 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id]; 562 memset(command_packet, 0, sizeof(TW_Sector)); 563 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM); 564 command_packet->size = 4; 565 command_packet->request_id = request_id; 566 command_packet->status = 0; 567 command_packet->flags = 0; 568 command_packet->byte6.parameter_count = 1; 569 command_que_value = tw_dev->command_packet_physical_address[request_id]; 570 if (command_que_value == 0) { 571 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet physical address.\n"); 572 return 1; 573 } 574 /* Now setup the param */ 575 if (tw_dev->alignment_virtual_address[request_id] == NULL) { 576 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment virtual address.\n"); 577 return 1; 578 } 579 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id]; 580 memset(param, 0, sizeof(TW_Sector)); 581 param->table_id = 0x401; /* AEN table */ 582 param->parameter_id = 2; /* Unit code */ 583 param->parameter_size_bytes = 2; 584 param_value = tw_dev->alignment_physical_address[request_id]; 585 if (param_value == 0) { 586 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment physical address.\n"); 587 return 1; 588 } 589 command_packet->byte8.param.sgl[0].address = param_value; 590 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector); 591 592 /* Now post the command packet */ 593 if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) { 594 dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post succeeded.\n"); 595 tw_dev->srb[request_id] = NULL; /* Flag internal command */ 596 tw_dev->state[request_id] = TW_S_POSTED; 597 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev)); 598 } else { 599 printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post failed, will retry.\n"); 600 return 1; 601 } 602 603 return 0; 604 } /* End tw_aen_read_queue() */ 605 606 /* This function will complete an aen request from the isr */ 607 static int tw_aen_complete(TW_Device_Extension *tw_dev, int request_id) 608 { 609 TW_Param *param; 610 unsigned short aen; 611 int error = 0, table_max = 0; 612 613 dprintk(KERN_WARNING "3w-xxxx: tw_aen_complete()\n"); 614 if (tw_dev->alignment_virtual_address[request_id] == NULL) { 615 printk(KERN_WARNING "3w-xxxx: tw_aen_complete(): Bad alignment virtual address.\n"); 616 return 1; 617 } 618 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id]; 619 aen = *(unsigned short *)(param->data); 620 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_complete(): Queue'd code 0x%x\n", aen); 621 622 /* Print some useful info when certain aen codes come out */ 623 if (aen == 0x0ff) { 624 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: INFO: AEN queue overflow.\n", tw_dev->host->host_no); 625 } else { 626 table_max = ARRAY_SIZE(tw_aen_string); 627 if ((aen & 0x0ff) < table_max) { 628 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') { 629 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s%d.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff], aen >> 8); 630 } else { 631 if (aen != 0x0) 632 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff]); 633 } 634 } else { 635 printk(KERN_WARNING "3w-xxxx: scsi%d: Received AEN %d.\n", tw_dev->host->host_no, aen); 636 } 637 } 638 if (aen != TW_AEN_QUEUE_EMPTY) { 639 tw_dev->aen_count++; 640 641 /* Now queue the code */ 642 tw_dev->aen_queue[tw_dev->aen_tail] = aen; 643 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) { 644 tw_dev->aen_tail = TW_Q_START; 645 } else { 646 tw_dev->aen_tail = tw_dev->aen_tail + 1; 647 } 648 if (tw_dev->aen_head == tw_dev->aen_tail) { 649 if (tw_dev->aen_head == TW_Q_LENGTH - 1) { 650 tw_dev->aen_head = TW_Q_START; 651 } else { 652 tw_dev->aen_head = tw_dev->aen_head + 1; 653 } 654 } 655 656 error = tw_aen_read_queue(tw_dev, request_id); 657 if (error) { 658 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing AEN.\n", tw_dev->host->host_no); 659 tw_dev->state[request_id] = TW_S_COMPLETED; 660 tw_state_request_finish(tw_dev, request_id); 661 } 662 } else { 663 tw_dev->state[request_id] = TW_S_COMPLETED; 664 tw_state_request_finish(tw_dev, request_id); 665 } 666 667 return 0; 668 } /* End tw_aen_complete() */ 669 670 /* This function will drain the aen queue after a soft reset */ 671 static int tw_aen_drain_queue(TW_Device_Extension *tw_dev) 672 { 673 TW_Command *command_packet; 674 TW_Param *param; 675 int request_id = 0; 676 unsigned long command_que_value; 677 unsigned long param_value; 678 TW_Response_Queue response_queue; 679 unsigned short aen; 680 unsigned short aen_code; 681 int finished = 0; 682 int first_reset = 0; 683 int queue = 0; 684 int found = 0, table_max = 0; 685 686 dprintk(KERN_NOTICE "3w-xxxx: tw_aen_drain_queue()\n"); 687 688 if (tw_poll_status(tw_dev, TW_STATUS_ATTENTION_INTERRUPT | TW_STATUS_MICROCONTROLLER_READY, 30)) { 689 dprintk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): No attention interrupt for card %d.\n", tw_device_extension_count); 690 return 1; 691 } 692 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev); 693 694 /* Empty response queue */ 695 tw_empty_response_que(tw_dev); 696 697 /* Initialize command packet */ 698 if (tw_dev->command_packet_virtual_address[request_id] == NULL) { 699 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet virtual address.\n"); 700 return 1; 701 } 702 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id]; 703 memset(command_packet, 0, sizeof(TW_Sector)); 704 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM); 705 command_packet->size = 4; 706 command_packet->request_id = request_id; 707 command_packet->status = 0; 708 command_packet->flags = 0; 709 command_packet->byte6.parameter_count = 1; 710 command_que_value = tw_dev->command_packet_physical_address[request_id]; 711 if (command_que_value == 0) { 712 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet physical address.\n"); 713 return 1; 714 } 715 716 /* Now setup the param */ 717 if (tw_dev->alignment_virtual_address[request_id] == NULL) { 718 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment virtual address.\n"); 719 return 1; 720 } 721 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id]; 722 memset(param, 0, sizeof(TW_Sector)); 723 param->table_id = 0x401; /* AEN table */ 724 param->parameter_id = 2; /* Unit code */ 725 param->parameter_size_bytes = 2; 726 param_value = tw_dev->alignment_physical_address[request_id]; 727 if (param_value == 0) { 728 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment physical address.\n"); 729 return 1; 730 } 731 command_packet->byte8.param.sgl[0].address = param_value; 732 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector); 733 734 /* Now drain the controller's aen queue */ 735 do { 736 /* Post command packet */ 737 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev)); 738 739 /* Now poll for completion */ 740 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) { 741 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev)); 742 request_id = TW_RESID_OUT(response_queue.response_id); 743 744 if (request_id != 0) { 745 /* Unexpected request id */ 746 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Unexpected request id.\n"); 747 return 1; 748 } 749 750 if (command_packet->status != 0) { 751 if (command_packet->flags != TW_AEN_TABLE_UNDEFINED) { 752 /* Bad response */ 753 tw_decode_sense(tw_dev, request_id, 0); 754 return 1; 755 } else { 756 /* We know this is a 3w-1x00, and doesn't support aen's */ 757 return 0; 758 } 759 } 760 761 /* Now check the aen */ 762 aen = *(unsigned short *)(param->data); 763 aen_code = (aen & 0x0ff); 764 queue = 0; 765 switch (aen_code) { 766 case TW_AEN_QUEUE_EMPTY: 767 dprintk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]); 768 if (first_reset != 1) { 769 return 1; 770 } else { 771 finished = 1; 772 } 773 break; 774 case TW_AEN_SOFT_RESET: 775 if (first_reset == 0) { 776 first_reset = 1; 777 } else { 778 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]); 779 tw_dev->aen_count++; 780 queue = 1; 781 } 782 break; 783 default: 784 if (aen == 0x0ff) { 785 printk(KERN_WARNING "3w-xxxx: AEN: INFO: AEN queue overflow.\n"); 786 } else { 787 table_max = ARRAY_SIZE(tw_aen_string); 788 if ((aen & 0x0ff) < table_max) { 789 if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') { 790 printk(KERN_WARNING "3w-xxxx: AEN: %s%d.\n", tw_aen_string[aen & 0xff], aen >> 8); 791 } else { 792 printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]); 793 } 794 } else 795 printk(KERN_WARNING "3w-xxxx: Received AEN %d.\n", aen); 796 } 797 tw_dev->aen_count++; 798 queue = 1; 799 } 800 801 /* Now put the aen on the aen_queue */ 802 if (queue == 1) { 803 tw_dev->aen_queue[tw_dev->aen_tail] = aen; 804 if (tw_dev->aen_tail == TW_Q_LENGTH - 1) { 805 tw_dev->aen_tail = TW_Q_START; 806 } else { 807 tw_dev->aen_tail = tw_dev->aen_tail + 1; 808 } 809 if (tw_dev->aen_head == tw_dev->aen_tail) { 810 if (tw_dev->aen_head == TW_Q_LENGTH - 1) { 811 tw_dev->aen_head = TW_Q_START; 812 } else { 813 tw_dev->aen_head = tw_dev->aen_head + 1; 814 } 815 } 816 } 817 found = 1; 818 } 819 if (found == 0) { 820 printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Response never received.\n"); 821 return 1; 822 } 823 } while (finished == 0); 824 825 return 0; 826 } /* End tw_aen_drain_queue() */ 827 828 /* This function will allocate memory */ 829 static int tw_allocate_memory(TW_Device_Extension *tw_dev, int size, int which) 830 { 831 int i; 832 dma_addr_t dma_handle; 833 unsigned long *cpu_addr = NULL; 834 835 dprintk(KERN_NOTICE "3w-xxxx: tw_allocate_memory()\n"); 836 837 cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, 838 size * TW_Q_LENGTH, &dma_handle, GFP_KERNEL); 839 if (cpu_addr == NULL) { 840 printk(KERN_WARNING "3w-xxxx: dma_alloc_coherent() failed.\n"); 841 return 1; 842 } 843 844 if ((unsigned long)cpu_addr % (tw_dev->tw_pci_dev->device == TW_DEVICE_ID ? TW_ALIGNMENT_6000 : TW_ALIGNMENT_7000)) { 845 printk(KERN_WARNING "3w-xxxx: Couldn't allocate correctly aligned memory.\n"); 846 dma_free_coherent(&tw_dev->tw_pci_dev->dev, size * TW_Q_LENGTH, 847 cpu_addr, dma_handle); 848 return 1; 849 } 850 851 memset(cpu_addr, 0, size*TW_Q_LENGTH); 852 853 for (i=0;i<TW_Q_LENGTH;i++) { 854 switch(which) { 855 case 0: 856 tw_dev->command_packet_physical_address[i] = dma_handle+(i*size); 857 tw_dev->command_packet_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size)); 858 break; 859 case 1: 860 tw_dev->alignment_physical_address[i] = dma_handle+(i*size); 861 tw_dev->alignment_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size)); 862 break; 863 default: 864 printk(KERN_WARNING "3w-xxxx: tw_allocate_memory(): case slip in tw_allocate_memory()\n"); 865 return 1; 866 } 867 } 868 869 return 0; 870 } /* End tw_allocate_memory() */ 871 872 /* This function handles ioctl for the character device */ 873 static long tw_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 874 { 875 int request_id; 876 dma_addr_t dma_handle; 877 unsigned short tw_aen_code; 878 unsigned long flags; 879 unsigned int data_buffer_length = 0; 880 unsigned long data_buffer_length_adjusted = 0; 881 struct inode *inode = file_inode(file); 882 unsigned long *cpu_addr; 883 long timeout; 884 TW_New_Ioctl *tw_ioctl; 885 TW_Passthru *passthru; 886 TW_Device_Extension *tw_dev = tw_device_extension_list[iminor(inode)]; 887 int retval = -EFAULT; 888 void __user *argp = (void __user *)arg; 889 890 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl()\n"); 891 892 mutex_lock(&tw_mutex); 893 /* Only let one of these through at a time */ 894 if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) { 895 mutex_unlock(&tw_mutex); 896 return -EINTR; 897 } 898 899 /* First copy down the buffer length */ 900 if (copy_from_user(&data_buffer_length, argp, sizeof(unsigned int))) 901 goto out; 902 903 /* Check size */ 904 if (data_buffer_length > TW_MAX_IOCTL_SECTORS * 512) { 905 retval = -EINVAL; 906 goto out; 907 } 908 909 /* Hardware can only do multiple of 512 byte transfers */ 910 data_buffer_length_adjusted = (data_buffer_length + 511) & ~511; 911 912 /* Now allocate ioctl buf memory */ 913 cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, &dma_handle, GFP_KERNEL); 914 if (cpu_addr == NULL) { 915 retval = -ENOMEM; 916 goto out; 917 } 918 919 tw_ioctl = (TW_New_Ioctl *)cpu_addr; 920 921 /* Now copy down the entire ioctl */ 922 if (copy_from_user(tw_ioctl, argp, data_buffer_length + sizeof(TW_New_Ioctl) - 1)) 923 goto out2; 924 925 passthru = (TW_Passthru *)&tw_ioctl->firmware_command; 926 927 /* See which ioctl we are doing */ 928 switch (cmd) { 929 case TW_OP_NOP: 930 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_OP_NOP.\n"); 931 break; 932 case TW_OP_AEN_LISTEN: 933 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_AEN_LISTEN.\n"); 934 memset(tw_ioctl->data_buffer, 0, data_buffer_length); 935 936 spin_lock_irqsave(tw_dev->host->host_lock, flags); 937 if (tw_dev->aen_head == tw_dev->aen_tail) { 938 tw_aen_code = TW_AEN_QUEUE_EMPTY; 939 } else { 940 tw_aen_code = tw_dev->aen_queue[tw_dev->aen_head]; 941 if (tw_dev->aen_head == TW_Q_LENGTH - 1) { 942 tw_dev->aen_head = TW_Q_START; 943 } else { 944 tw_dev->aen_head = tw_dev->aen_head + 1; 945 } 946 } 947 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 948 memcpy(tw_ioctl->data_buffer, &tw_aen_code, sizeof(tw_aen_code)); 949 break; 950 case TW_CMD_PACKET_WITH_DATA: 951 dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_CMD_PACKET_WITH_DATA.\n"); 952 spin_lock_irqsave(tw_dev->host->host_lock, flags); 953 954 tw_state_request_start(tw_dev, &request_id); 955 956 /* Flag internal command */ 957 tw_dev->srb[request_id] = NULL; 958 959 /* Flag chrdev ioctl */ 960 tw_dev->chrdev_request_id = request_id; 961 962 tw_ioctl->firmware_command.request_id = request_id; 963 964 /* Load the sg list */ 965 switch (TW_SGL_OUT(tw_ioctl->firmware_command.opcode__sgloffset)) { 966 case 2: 967 tw_ioctl->firmware_command.byte8.param.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1; 968 tw_ioctl->firmware_command.byte8.param.sgl[0].length = data_buffer_length_adjusted; 969 break; 970 case 3: 971 tw_ioctl->firmware_command.byte8.io.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1; 972 tw_ioctl->firmware_command.byte8.io.sgl[0].length = data_buffer_length_adjusted; 973 break; 974 case 5: 975 passthru->sg_list[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1; 976 passthru->sg_list[0].length = data_buffer_length_adjusted; 977 break; 978 } 979 980 memcpy(tw_dev->command_packet_virtual_address[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command)); 981 982 /* Now post the command packet to the controller */ 983 tw_post_command_packet(tw_dev, request_id); 984 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 985 986 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ; 987 988 /* Now wait for the command to complete */ 989 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout); 990 991 /* We timed out, and didn't get an interrupt */ 992 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) { 993 /* Now we need to reset the board */ 994 printk(KERN_WARNING "3w-xxxx: scsi%d: Character ioctl (0x%x) timed out, resetting card.\n", tw_dev->host->host_no, cmd); 995 retval = -EIO; 996 if (tw_reset_device_extension(tw_dev)) { 997 printk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): Reset failed for card %d.\n", tw_dev->host->host_no); 998 } 999 goto out2; 1000 } 1001 1002 /* Now copy in the command packet response */ 1003 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virtual_address[request_id], sizeof(TW_Command)); 1004 1005 /* Now complete the io */ 1006 spin_lock_irqsave(tw_dev->host->host_lock, flags); 1007 tw_dev->posted_request_count--; 1008 tw_dev->state[request_id] = TW_S_COMPLETED; 1009 tw_state_request_finish(tw_dev, request_id); 1010 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 1011 break; 1012 default: 1013 retval = -ENOTTY; 1014 goto out2; 1015 } 1016 1017 /* Now copy the response to userspace */ 1018 if (copy_to_user(argp, tw_ioctl, sizeof(TW_New_Ioctl) + data_buffer_length - 1)) 1019 goto out2; 1020 retval = 0; 1021 out2: 1022 /* Now free ioctl buf memory */ 1023 dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, cpu_addr, dma_handle); 1024 out: 1025 mutex_unlock(&tw_dev->ioctl_lock); 1026 mutex_unlock(&tw_mutex); 1027 return retval; 1028 } /* End tw_chrdev_ioctl() */ 1029 1030 /* This function handles open for the character device */ 1031 /* NOTE that this function races with remove. */ 1032 static int tw_chrdev_open(struct inode *inode, struct file *file) 1033 { 1034 unsigned int minor_number; 1035 1036 dprintk(KERN_WARNING "3w-xxxx: tw_ioctl_open()\n"); 1037 1038 if (!capable(CAP_SYS_ADMIN)) 1039 return -EACCES; 1040 1041 minor_number = iminor(inode); 1042 if (minor_number >= tw_device_extension_count) 1043 return -ENODEV; 1044 1045 return 0; 1046 } /* End tw_chrdev_open() */ 1047 1048 /* File operations struct for character device */ 1049 static const struct file_operations tw_fops = { 1050 .owner = THIS_MODULE, 1051 .unlocked_ioctl = tw_chrdev_ioctl, 1052 .compat_ioctl = compat_ptr_ioctl, 1053 .open = tw_chrdev_open, 1054 .release = NULL, 1055 .llseek = noop_llseek, 1056 }; 1057 1058 /* This function will free up device extension resources */ 1059 static void tw_free_device_extension(TW_Device_Extension *tw_dev) 1060 { 1061 dprintk(KERN_NOTICE "3w-xxxx: tw_free_device_extension()\n"); 1062 1063 /* Free command packet and generic buffer memory */ 1064 if (tw_dev->command_packet_virtual_address[0]) 1065 dma_free_coherent(&tw_dev->tw_pci_dev->dev, 1066 sizeof(TW_Command) * TW_Q_LENGTH, 1067 tw_dev->command_packet_virtual_address[0], 1068 tw_dev->command_packet_physical_address[0]); 1069 1070 if (tw_dev->alignment_virtual_address[0]) 1071 dma_free_coherent(&tw_dev->tw_pci_dev->dev, 1072 sizeof(TW_Sector) * TW_Q_LENGTH, 1073 tw_dev->alignment_virtual_address[0], 1074 tw_dev->alignment_physical_address[0]); 1075 } /* End tw_free_device_extension() */ 1076 1077 /* This function will send an initconnection command to controller */ 1078 static int tw_initconnection(TW_Device_Extension *tw_dev, int message_credits) 1079 { 1080 unsigned long command_que_value; 1081 TW_Command *command_packet; 1082 TW_Response_Queue response_queue; 1083 int request_id = 0; 1084 1085 dprintk(KERN_NOTICE "3w-xxxx: tw_initconnection()\n"); 1086 1087 /* Initialize InitConnection command packet */ 1088 if (tw_dev->command_packet_virtual_address[request_id] == NULL) { 1089 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet virtual address.\n"); 1090 return 1; 1091 } 1092 1093 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id]; 1094 memset(command_packet, 0, sizeof(TW_Sector)); 1095 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_INIT_CONNECTION); 1096 command_packet->size = TW_INIT_COMMAND_PACKET_SIZE; 1097 command_packet->request_id = request_id; 1098 command_packet->status = 0x0; 1099 command_packet->flags = 0x0; 1100 command_packet->byte6.message_credits = message_credits; 1101 command_packet->byte8.init_connection.response_queue_pointer = 0x0; 1102 command_que_value = tw_dev->command_packet_physical_address[request_id]; 1103 1104 if (command_que_value == 0) { 1105 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet physical address.\n"); 1106 return 1; 1107 } 1108 1109 /* Send command packet to the board */ 1110 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev)); 1111 1112 /* Poll for completion */ 1113 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) { 1114 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev)); 1115 request_id = TW_RESID_OUT(response_queue.response_id); 1116 1117 if (request_id != 0) { 1118 /* unexpected request id */ 1119 printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Unexpected request id.\n"); 1120 return 1; 1121 } 1122 if (command_packet->status != 0) { 1123 /* bad response */ 1124 tw_decode_sense(tw_dev, request_id, 0); 1125 return 1; 1126 } 1127 } 1128 return 0; 1129 } /* End tw_initconnection() */ 1130 1131 /* Set a value in the features table */ 1132 static int tw_setfeature(TW_Device_Extension *tw_dev, int parm, int param_size, 1133 unsigned char *val) 1134 { 1135 TW_Param *param; 1136 TW_Command *command_packet; 1137 TW_Response_Queue response_queue; 1138 int request_id = 0; 1139 unsigned long command_que_value; 1140 unsigned long param_value; 1141 1142 /* Initialize SetParam command packet */ 1143 if (tw_dev->command_packet_virtual_address[request_id] == NULL) { 1144 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet virtual address.\n"); 1145 return 1; 1146 } 1147 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id]; 1148 memset(command_packet, 0, sizeof(TW_Sector)); 1149 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id]; 1150 1151 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM); 1152 param->table_id = 0x404; /* Features table */ 1153 param->parameter_id = parm; 1154 param->parameter_size_bytes = param_size; 1155 memcpy(param->data, val, param_size); 1156 1157 param_value = tw_dev->alignment_physical_address[request_id]; 1158 if (param_value == 0) { 1159 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad alignment physical address.\n"); 1160 tw_dev->state[request_id] = TW_S_COMPLETED; 1161 tw_state_request_finish(tw_dev, request_id); 1162 tw_dev->srb[request_id]->result = (DID_OK << 16); 1163 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]); 1164 } 1165 command_packet->byte8.param.sgl[0].address = param_value; 1166 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector); 1167 1168 command_packet->size = 4; 1169 command_packet->request_id = request_id; 1170 command_packet->byte6.parameter_count = 1; 1171 1172 command_que_value = tw_dev->command_packet_physical_address[request_id]; 1173 if (command_que_value == 0) { 1174 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad command packet physical address.\n"); 1175 return 1; 1176 } 1177 1178 /* Send command packet to the board */ 1179 outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev)); 1180 1181 /* Poll for completion */ 1182 if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) { 1183 response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev)); 1184 request_id = TW_RESID_OUT(response_queue.response_id); 1185 1186 if (request_id != 0) { 1187 /* unexpected request id */ 1188 printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Unexpected request id.\n"); 1189 return 1; 1190 } 1191 if (command_packet->status != 0) { 1192 /* bad response */ 1193 tw_decode_sense(tw_dev, request_id, 0); 1194 return 1; 1195 } 1196 } 1197 1198 return 0; 1199 } /* End tw_setfeature() */ 1200 1201 /* This function will reset a controller */ 1202 static int tw_reset_sequence(TW_Device_Extension *tw_dev) 1203 { 1204 int error = 0; 1205 int tries = 0; 1206 unsigned char c = 1; 1207 1208 /* Reset the board */ 1209 while (tries < TW_MAX_RESET_TRIES) { 1210 TW_SOFT_RESET(tw_dev); 1211 1212 error = tw_aen_drain_queue(tw_dev); 1213 if (error) { 1214 printk(KERN_WARNING "3w-xxxx: scsi%d: AEN drain failed, retrying.\n", tw_dev->host->host_no); 1215 tries++; 1216 continue; 1217 } 1218 1219 /* Check for controller errors */ 1220 if (tw_check_errors(tw_dev)) { 1221 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors found, retrying.\n", tw_dev->host->host_no); 1222 tries++; 1223 continue; 1224 } 1225 1226 /* Now the controller is in a good state */ 1227 break; 1228 } 1229 1230 if (tries >= TW_MAX_RESET_TRIES) { 1231 printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors, card not responding, check all cabling.\n", tw_dev->host->host_no); 1232 return 1; 1233 } 1234 1235 error = tw_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS); 1236 if (error) { 1237 printk(KERN_WARNING "3w-xxxx: scsi%d: Connection initialization failed.\n", tw_dev->host->host_no); 1238 return 1; 1239 } 1240 1241 error = tw_setfeature(tw_dev, 2, 1, &c); 1242 if (error) { 1243 printk(KERN_WARNING "3w-xxxx: Unable to set features for card, probable old firmware or card.\n"); 1244 } 1245 1246 return 0; 1247 } /* End tw_reset_sequence() */ 1248 1249 /* This function will initialize the fields of a device extension */ 1250 static int tw_initialize_device_extension(TW_Device_Extension *tw_dev) 1251 { 1252 int i, error=0; 1253 1254 dprintk(KERN_NOTICE "3w-xxxx: tw_initialize_device_extension()\n"); 1255 1256 /* Initialize command packet buffers */ 1257 error = tw_allocate_memory(tw_dev, sizeof(TW_Command), 0); 1258 if (error) { 1259 printk(KERN_WARNING "3w-xxxx: Command packet memory allocation failed.\n"); 1260 return 1; 1261 } 1262 1263 /* Initialize generic buffer */ 1264 error = tw_allocate_memory(tw_dev, sizeof(TW_Sector), 1); 1265 if (error) { 1266 printk(KERN_WARNING "3w-xxxx: Generic memory allocation failed.\n"); 1267 return 1; 1268 } 1269 1270 for (i=0;i<TW_Q_LENGTH;i++) { 1271 tw_dev->free_queue[i] = i; 1272 tw_dev->state[i] = TW_S_INITIAL; 1273 } 1274 1275 tw_dev->pending_head = TW_Q_START; 1276 tw_dev->pending_tail = TW_Q_START; 1277 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; 1278 1279 mutex_init(&tw_dev->ioctl_lock); 1280 init_waitqueue_head(&tw_dev->ioctl_wqueue); 1281 1282 return 0; 1283 } /* End tw_initialize_device_extension() */ 1284 1285 /* This function will reset a device extension */ 1286 static int tw_reset_device_extension(TW_Device_Extension *tw_dev) 1287 { 1288 int i = 0; 1289 struct scsi_cmnd *srb; 1290 unsigned long flags = 0; 1291 1292 dprintk(KERN_NOTICE "3w-xxxx: tw_reset_device_extension()\n"); 1293 1294 set_bit(TW_IN_RESET, &tw_dev->flags); 1295 TW_DISABLE_INTERRUPTS(tw_dev); 1296 TW_MASK_COMMAND_INTERRUPT(tw_dev); 1297 spin_lock_irqsave(tw_dev->host->host_lock, flags); 1298 1299 /* Abort all requests that are in progress */ 1300 for (i=0;i<TW_Q_LENGTH;i++) { 1301 if ((tw_dev->state[i] != TW_S_FINISHED) && 1302 (tw_dev->state[i] != TW_S_INITIAL) && 1303 (tw_dev->state[i] != TW_S_COMPLETED)) { 1304 srb = tw_dev->srb[i]; 1305 if (srb != NULL) { 1306 srb->result = (DID_RESET << 16); 1307 scsi_dma_unmap(srb); 1308 srb->scsi_done(srb); 1309 } 1310 } 1311 } 1312 1313 /* Reset queues and counts */ 1314 for (i=0;i<TW_Q_LENGTH;i++) { 1315 tw_dev->free_queue[i] = i; 1316 tw_dev->state[i] = TW_S_INITIAL; 1317 } 1318 tw_dev->free_head = TW_Q_START; 1319 tw_dev->free_tail = TW_Q_START; 1320 tw_dev->posted_request_count = 0; 1321 tw_dev->pending_request_count = 0; 1322 tw_dev->pending_head = TW_Q_START; 1323 tw_dev->pending_tail = TW_Q_START; 1324 tw_dev->reset_print = 0; 1325 1326 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 1327 1328 if (tw_reset_sequence(tw_dev)) { 1329 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset sequence failed.\n", tw_dev->host->host_no); 1330 return 1; 1331 } 1332 1333 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev); 1334 clear_bit(TW_IN_RESET, &tw_dev->flags); 1335 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; 1336 1337 return 0; 1338 } /* End tw_reset_device_extension() */ 1339 1340 /* This funciton returns unit geometry in cylinders/heads/sectors */ 1341 static int tw_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev, 1342 sector_t capacity, int geom[]) 1343 { 1344 int heads, sectors, cylinders; 1345 1346 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam()\n"); 1347 1348 heads = 64; 1349 sectors = 32; 1350 cylinders = sector_div(capacity, heads * sectors); 1351 1352 if (capacity >= 0x200000) { 1353 heads = 255; 1354 sectors = 63; 1355 cylinders = sector_div(capacity, heads * sectors); 1356 } 1357 1358 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam(): heads = %d, sectors = %d, cylinders = %d\n", heads, sectors, cylinders); 1359 geom[0] = heads; 1360 geom[1] = sectors; 1361 geom[2] = cylinders; 1362 1363 return 0; 1364 } /* End tw_scsi_biosparam() */ 1365 1366 /* This is the new scsi eh reset function */ 1367 static int tw_scsi_eh_reset(struct scsi_cmnd *SCpnt) 1368 { 1369 TW_Device_Extension *tw_dev=NULL; 1370 int retval = FAILED; 1371 1372 tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata; 1373 1374 tw_dev->num_resets++; 1375 1376 sdev_printk(KERN_WARNING, SCpnt->device, 1377 "WARNING: Command (0x%x) timed out, resetting card.\n", 1378 SCpnt->cmnd[0]); 1379 1380 /* Make sure we are not issuing an ioctl or resetting from ioctl */ 1381 mutex_lock(&tw_dev->ioctl_lock); 1382 1383 /* Now reset the card and some of the device extension data */ 1384 if (tw_reset_device_extension(tw_dev)) { 1385 printk(KERN_WARNING "3w-xxxx: scsi%d: Reset failed.\n", tw_dev->host->host_no); 1386 goto out; 1387 } 1388 1389 retval = SUCCESS; 1390 out: 1391 mutex_unlock(&tw_dev->ioctl_lock); 1392 return retval; 1393 } /* End tw_scsi_eh_reset() */ 1394 1395 /* This function handles scsi inquiry commands */ 1396 static int tw_scsiop_inquiry(TW_Device_Extension *tw_dev, int request_id) 1397 { 1398 TW_Param *param; 1399 TW_Command *command_packet; 1400 unsigned long command_que_value; 1401 unsigned long param_value; 1402 1403 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry()\n"); 1404 1405 /* Initialize command packet */ 1406 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id]; 1407 if (command_packet == NULL) { 1408 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet virtual address.\n"); 1409 return 1; 1410 } 1411 memset(command_packet, 0, sizeof(TW_Sector)); 1412 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM); 1413 command_packet->size = 4; 1414 command_packet->request_id = request_id; 1415 command_packet->status = 0; 1416 command_packet->flags = 0; 1417 command_packet->byte6.parameter_count = 1; 1418 1419 /* Now setup the param */ 1420 if (tw_dev->alignment_virtual_address[request_id] == NULL) { 1421 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment virtual address.\n"); 1422 return 1; 1423 } 1424 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id]; 1425 memset(param, 0, sizeof(TW_Sector)); 1426 param->table_id = 3; /* unit summary table */ 1427 param->parameter_id = 3; /* unitsstatus parameter */ 1428 param->parameter_size_bytes = TW_MAX_UNITS; 1429 param_value = tw_dev->alignment_physical_address[request_id]; 1430 if (param_value == 0) { 1431 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad alignment physical address.\n"); 1432 return 1; 1433 } 1434 1435 command_packet->byte8.param.sgl[0].address = param_value; 1436 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector); 1437 command_que_value = tw_dev->command_packet_physical_address[request_id]; 1438 if (command_que_value == 0) { 1439 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet physical address.\n"); 1440 return 1; 1441 } 1442 1443 /* Now try to post the command packet */ 1444 tw_post_command_packet(tw_dev, request_id); 1445 1446 return 0; 1447 } /* End tw_scsiop_inquiry() */ 1448 1449 static void tw_transfer_internal(TW_Device_Extension *tw_dev, int request_id, 1450 void *data, unsigned int len) 1451 { 1452 scsi_sg_copy_from_buffer(tw_dev->srb[request_id], data, len); 1453 } 1454 1455 /* This function is called by the isr to complete an inquiry command */ 1456 static int tw_scsiop_inquiry_complete(TW_Device_Extension *tw_dev, int request_id) 1457 { 1458 unsigned char *is_unit_present; 1459 unsigned char request_buffer[36]; 1460 TW_Param *param; 1461 1462 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry_complete()\n"); 1463 1464 memset(request_buffer, 0, sizeof(request_buffer)); 1465 request_buffer[0] = TYPE_DISK; /* Peripheral device type */ 1466 request_buffer[1] = 0; /* Device type modifier */ 1467 request_buffer[2] = 0; /* No ansi/iso compliance */ 1468 request_buffer[4] = 31; /* Additional length */ 1469 memcpy(&request_buffer[8], "3ware ", 8); /* Vendor ID */ 1470 sprintf(&request_buffer[16], "Logical Disk %-2d ", tw_dev->srb[request_id]->device->id); 1471 memcpy(&request_buffer[32], TW_DRIVER_VERSION, 3); 1472 tw_transfer_internal(tw_dev, request_id, request_buffer, 1473 sizeof(request_buffer)); 1474 1475 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id]; 1476 if (param == NULL) { 1477 printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry_complete(): Bad alignment virtual address.\n"); 1478 return 1; 1479 } 1480 is_unit_present = &(param->data[0]); 1481 1482 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) { 1483 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1; 1484 } else { 1485 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0; 1486 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16); 1487 return TW_ISR_DONT_RESULT; 1488 } 1489 1490 return 0; 1491 } /* End tw_scsiop_inquiry_complete() */ 1492 1493 /* This function handles scsi mode_sense commands */ 1494 static int tw_scsiop_mode_sense(TW_Device_Extension *tw_dev, int request_id) 1495 { 1496 TW_Param *param; 1497 TW_Command *command_packet; 1498 unsigned long command_que_value; 1499 unsigned long param_value; 1500 1501 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense()\n"); 1502 1503 /* Only page control = 0, page code = 0x8 (cache page) supported */ 1504 if (tw_dev->srb[request_id]->cmnd[2] != 0x8) { 1505 tw_dev->state[request_id] = TW_S_COMPLETED; 1506 tw_state_request_finish(tw_dev, request_id); 1507 tw_dev->srb[request_id]->result = (DID_OK << 16); 1508 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]); 1509 return 0; 1510 } 1511 1512 /* Now read firmware cache setting for this unit */ 1513 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id]; 1514 if (command_packet == NULL) { 1515 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet virtual address.\n"); 1516 return 1; 1517 } 1518 1519 /* Setup the command packet */ 1520 memset(command_packet, 0, sizeof(TW_Sector)); 1521 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM); 1522 command_packet->size = 4; 1523 command_packet->request_id = request_id; 1524 command_packet->status = 0; 1525 command_packet->flags = 0; 1526 command_packet->byte6.parameter_count = 1; 1527 1528 /* Setup the param */ 1529 if (tw_dev->alignment_virtual_address[request_id] == NULL) { 1530 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment virtual address.\n"); 1531 return 1; 1532 } 1533 1534 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id]; 1535 memset(param, 0, sizeof(TW_Sector)); 1536 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE + tw_dev->srb[request_id]->device->id; 1537 param->parameter_id = 7; /* unit flags */ 1538 param->parameter_size_bytes = 1; 1539 param_value = tw_dev->alignment_physical_address[request_id]; 1540 if (param_value == 0) { 1541 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad alignment physical address.\n"); 1542 return 1; 1543 } 1544 1545 command_packet->byte8.param.sgl[0].address = param_value; 1546 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector); 1547 command_que_value = tw_dev->command_packet_physical_address[request_id]; 1548 if (command_que_value == 0) { 1549 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet physical address.\n"); 1550 return 1; 1551 } 1552 1553 /* Now try to post the command packet */ 1554 tw_post_command_packet(tw_dev, request_id); 1555 1556 return 0; 1557 } /* End tw_scsiop_mode_sense() */ 1558 1559 /* This function is called by the isr to complete a mode sense command */ 1560 static int tw_scsiop_mode_sense_complete(TW_Device_Extension *tw_dev, int request_id) 1561 { 1562 TW_Param *param; 1563 unsigned char *flags; 1564 unsigned char request_buffer[8]; 1565 1566 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense_complete()\n"); 1567 1568 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id]; 1569 if (param == NULL) { 1570 printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense_complete(): Bad alignment virtual address.\n"); 1571 return 1; 1572 } 1573 flags = (char *)&(param->data[0]); 1574 memset(request_buffer, 0, sizeof(request_buffer)); 1575 1576 request_buffer[0] = 0xf; /* mode data length */ 1577 request_buffer[1] = 0; /* default medium type */ 1578 request_buffer[2] = 0x10; /* dpo/fua support on */ 1579 request_buffer[3] = 0; /* no block descriptors */ 1580 request_buffer[4] = 0x8; /* caching page */ 1581 request_buffer[5] = 0xa; /* page length */ 1582 if (*flags & 0x1) 1583 request_buffer[6] = 0x5; /* WCE on, RCD on */ 1584 else 1585 request_buffer[6] = 0x1; /* WCE off, RCD on */ 1586 tw_transfer_internal(tw_dev, request_id, request_buffer, 1587 sizeof(request_buffer)); 1588 1589 return 0; 1590 } /* End tw_scsiop_mode_sense_complete() */ 1591 1592 /* This function handles scsi read_capacity commands */ 1593 static int tw_scsiop_read_capacity(TW_Device_Extension *tw_dev, int request_id) 1594 { 1595 TW_Param *param; 1596 TW_Command *command_packet; 1597 unsigned long command_que_value; 1598 unsigned long param_value; 1599 1600 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity()\n"); 1601 1602 /* Initialize command packet */ 1603 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id]; 1604 1605 if (command_packet == NULL) { 1606 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet virtual address.\n"); 1607 return 1; 1608 } 1609 memset(command_packet, 0, sizeof(TW_Sector)); 1610 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM); 1611 command_packet->size = 4; 1612 command_packet->request_id = request_id; 1613 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id); 1614 command_packet->status = 0; 1615 command_packet->flags = 0; 1616 command_packet->byte6.block_count = 1; 1617 1618 /* Now setup the param */ 1619 if (tw_dev->alignment_virtual_address[request_id] == NULL) { 1620 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment virtual address.\n"); 1621 return 1; 1622 } 1623 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id]; 1624 memset(param, 0, sizeof(TW_Sector)); 1625 param->table_id = TW_UNIT_INFORMATION_TABLE_BASE + 1626 tw_dev->srb[request_id]->device->id; 1627 param->parameter_id = 4; /* unitcapacity parameter */ 1628 param->parameter_size_bytes = 4; 1629 param_value = tw_dev->alignment_physical_address[request_id]; 1630 if (param_value == 0) { 1631 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad alignment physical address.\n"); 1632 return 1; 1633 } 1634 1635 command_packet->byte8.param.sgl[0].address = param_value; 1636 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector); 1637 command_que_value = tw_dev->command_packet_physical_address[request_id]; 1638 if (command_que_value == 0) { 1639 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet physical address.\n"); 1640 return 1; 1641 } 1642 1643 /* Now try to post the command to the board */ 1644 tw_post_command_packet(tw_dev, request_id); 1645 1646 return 0; 1647 } /* End tw_scsiop_read_capacity() */ 1648 1649 /* This function is called by the isr to complete a readcapacity command */ 1650 static int tw_scsiop_read_capacity_complete(TW_Device_Extension *tw_dev, int request_id) 1651 { 1652 unsigned char *param_data; 1653 u32 capacity; 1654 char buff[8]; 1655 TW_Param *param; 1656 1657 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete()\n"); 1658 1659 memset(buff, 0, sizeof(buff)); 1660 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id]; 1661 if (param == NULL) { 1662 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_capacity_complete(): Bad alignment virtual address.\n"); 1663 return 1; 1664 } 1665 param_data = &(param->data[0]); 1666 1667 capacity = (param_data[3] << 24) | (param_data[2] << 16) | 1668 (param_data[1] << 8) | param_data[0]; 1669 1670 /* Subtract one sector to fix get last sector ioctl */ 1671 capacity -= 1; 1672 1673 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete(): Capacity = 0x%x.\n", capacity); 1674 1675 /* Number of LBA's */ 1676 buff[0] = (capacity >> 24); 1677 buff[1] = (capacity >> 16) & 0xff; 1678 buff[2] = (capacity >> 8) & 0xff; 1679 buff[3] = capacity & 0xff; 1680 1681 /* Block size in bytes (512) */ 1682 buff[4] = (TW_BLOCK_SIZE >> 24); 1683 buff[5] = (TW_BLOCK_SIZE >> 16) & 0xff; 1684 buff[6] = (TW_BLOCK_SIZE >> 8) & 0xff; 1685 buff[7] = TW_BLOCK_SIZE & 0xff; 1686 1687 tw_transfer_internal(tw_dev, request_id, buff, sizeof(buff)); 1688 1689 return 0; 1690 } /* End tw_scsiop_read_capacity_complete() */ 1691 1692 /* This function handles scsi read or write commands */ 1693 static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id) 1694 { 1695 TW_Command *command_packet; 1696 unsigned long command_que_value; 1697 u32 lba = 0x0, num_sectors = 0x0; 1698 int i, use_sg; 1699 struct scsi_cmnd *srb; 1700 struct scatterlist *sglist, *sg; 1701 1702 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write()\n"); 1703 1704 srb = tw_dev->srb[request_id]; 1705 1706 sglist = scsi_sglist(srb); 1707 if (!sglist) { 1708 printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Request buffer NULL.\n"); 1709 return 1; 1710 } 1711 1712 /* Initialize command packet */ 1713 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id]; 1714 if (command_packet == NULL) { 1715 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): Bad command packet virtual address.\n"); 1716 return 1; 1717 } 1718 1719 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == READ_10) { 1720 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_READ); 1721 } else { 1722 command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_WRITE); 1723 } 1724 1725 command_packet->size = 3; 1726 command_packet->request_id = request_id; 1727 command_packet->unit__hostid = TW_UNITHOST_IN(0, srb->device->id); 1728 command_packet->status = 0; 1729 command_packet->flags = 0; 1730 1731 if (srb->cmnd[0] == WRITE_10) { 1732 if ((srb->cmnd[1] & 0x8) || (srb->cmnd[1] & 0x10)) 1733 command_packet->flags = 1; 1734 } 1735 1736 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6) { 1737 lba = ((u32)srb->cmnd[1] << 16) | ((u32)srb->cmnd[2] << 8) | (u32)srb->cmnd[3]; 1738 num_sectors = (u32)srb->cmnd[4]; 1739 } else { 1740 lba = ((u32)srb->cmnd[2] << 24) | ((u32)srb->cmnd[3] << 16) | ((u32)srb->cmnd[4] << 8) | (u32)srb->cmnd[5]; 1741 num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8); 1742 } 1743 1744 /* Update sector statistic */ 1745 tw_dev->sector_count = num_sectors; 1746 if (tw_dev->sector_count > tw_dev->max_sector_count) 1747 tw_dev->max_sector_count = tw_dev->sector_count; 1748 1749 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): lba = 0x%x num_sectors = 0x%x\n", lba, num_sectors); 1750 command_packet->byte8.io.lba = lba; 1751 command_packet->byte6.block_count = num_sectors; 1752 1753 use_sg = scsi_dma_map(srb); 1754 if (use_sg <= 0) 1755 return 1; 1756 1757 scsi_for_each_sg(tw_dev->srb[request_id], sg, use_sg, i) { 1758 command_packet->byte8.io.sgl[i].address = sg_dma_address(sg); 1759 command_packet->byte8.io.sgl[i].length = sg_dma_len(sg); 1760 command_packet->size+=2; 1761 } 1762 1763 /* Update SG statistics */ 1764 tw_dev->sgl_entries = scsi_sg_count(tw_dev->srb[request_id]); 1765 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries) 1766 tw_dev->max_sgl_entries = tw_dev->sgl_entries; 1767 1768 command_que_value = tw_dev->command_packet_physical_address[request_id]; 1769 if (command_que_value == 0) { 1770 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Bad command packet physical address.\n"); 1771 return 1; 1772 } 1773 1774 /* Now try to post the command to the board */ 1775 tw_post_command_packet(tw_dev, request_id); 1776 1777 return 0; 1778 } /* End tw_scsiop_read_write() */ 1779 1780 /* This function will handle the request sense scsi command */ 1781 static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id) 1782 { 1783 char request_buffer[18]; 1784 1785 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n"); 1786 1787 memset(request_buffer, 0, sizeof(request_buffer)); 1788 request_buffer[0] = 0x70; /* Immediate fixed format */ 1789 request_buffer[7] = 10; /* minimum size per SPC: 18 bytes */ 1790 /* leave all other fields zero, giving effectively NO_SENSE return */ 1791 tw_transfer_internal(tw_dev, request_id, request_buffer, 1792 sizeof(request_buffer)); 1793 1794 tw_dev->state[request_id] = TW_S_COMPLETED; 1795 tw_state_request_finish(tw_dev, request_id); 1796 1797 /* If we got a request_sense, we probably want a reset, return error */ 1798 tw_dev->srb[request_id]->result = (DID_ERROR << 16); 1799 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]); 1800 1801 return 0; 1802 } /* End tw_scsiop_request_sense() */ 1803 1804 /* This function will handle synchronize cache scsi command */ 1805 static int tw_scsiop_synchronize_cache(TW_Device_Extension *tw_dev, int request_id) 1806 { 1807 TW_Command *command_packet; 1808 unsigned long command_que_value; 1809 1810 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_synchronize_cache()\n"); 1811 1812 /* Send firmware flush command for this unit */ 1813 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id]; 1814 if (command_packet == NULL) { 1815 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet virtual address.\n"); 1816 return 1; 1817 } 1818 1819 /* Setup the command packet */ 1820 memset(command_packet, 0, sizeof(TW_Sector)); 1821 command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_FLUSH_CACHE); 1822 command_packet->size = 2; 1823 command_packet->request_id = request_id; 1824 command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id); 1825 command_packet->status = 0; 1826 command_packet->flags = 0; 1827 command_packet->byte6.parameter_count = 1; 1828 command_que_value = tw_dev->command_packet_physical_address[request_id]; 1829 if (command_que_value == 0) { 1830 printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet physical address.\n"); 1831 return 1; 1832 } 1833 1834 /* Now try to post the command packet */ 1835 tw_post_command_packet(tw_dev, request_id); 1836 1837 return 0; 1838 } /* End tw_scsiop_synchronize_cache() */ 1839 1840 /* This function will handle test unit ready scsi command */ 1841 static int tw_scsiop_test_unit_ready(TW_Device_Extension *tw_dev, int request_id) 1842 { 1843 TW_Param *param; 1844 TW_Command *command_packet; 1845 unsigned long command_que_value; 1846 unsigned long param_value; 1847 1848 dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_test_unit_ready()\n"); 1849 1850 /* Initialize command packet */ 1851 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id]; 1852 if (command_packet == NULL) { 1853 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet virtual address.\n"); 1854 return 1; 1855 } 1856 memset(command_packet, 0, sizeof(TW_Sector)); 1857 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM); 1858 command_packet->size = 4; 1859 command_packet->request_id = request_id; 1860 command_packet->status = 0; 1861 command_packet->flags = 0; 1862 command_packet->byte6.parameter_count = 1; 1863 1864 /* Now setup the param */ 1865 if (tw_dev->alignment_virtual_address[request_id] == NULL) { 1866 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment virtual address.\n"); 1867 return 1; 1868 } 1869 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id]; 1870 memset(param, 0, sizeof(TW_Sector)); 1871 param->table_id = 3; /* unit summary table */ 1872 param->parameter_id = 3; /* unitsstatus parameter */ 1873 param->parameter_size_bytes = TW_MAX_UNITS; 1874 param_value = tw_dev->alignment_physical_address[request_id]; 1875 if (param_value == 0) { 1876 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad alignment physical address.\n"); 1877 return 1; 1878 } 1879 1880 command_packet->byte8.param.sgl[0].address = param_value; 1881 command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector); 1882 command_que_value = tw_dev->command_packet_physical_address[request_id]; 1883 if (command_que_value == 0) { 1884 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet physical address.\n"); 1885 return 1; 1886 } 1887 1888 /* Now try to post the command packet */ 1889 tw_post_command_packet(tw_dev, request_id); 1890 1891 return 0; 1892 } /* End tw_scsiop_test_unit_ready() */ 1893 1894 /* This function is called by the isr to complete a testunitready command */ 1895 static int tw_scsiop_test_unit_ready_complete(TW_Device_Extension *tw_dev, int request_id) 1896 { 1897 unsigned char *is_unit_present; 1898 TW_Param *param; 1899 1900 dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete()\n"); 1901 1902 param = (TW_Param *)tw_dev->alignment_virtual_address[request_id]; 1903 if (param == NULL) { 1904 printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete(): Bad alignment virtual address.\n"); 1905 return 1; 1906 } 1907 is_unit_present = &(param->data[0]); 1908 1909 if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) { 1910 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1; 1911 } else { 1912 tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0; 1913 tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16); 1914 return TW_ISR_DONT_RESULT; 1915 } 1916 1917 return 0; 1918 } /* End tw_scsiop_test_unit_ready_complete() */ 1919 1920 /* This is the main scsi queue function to handle scsi opcodes */ 1921 static int tw_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *)) 1922 { 1923 unsigned char *command = SCpnt->cmnd; 1924 int request_id = 0; 1925 int retval = 1; 1926 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata; 1927 1928 /* If we are resetting due to timed out ioctl, report as busy */ 1929 if (test_bit(TW_IN_RESET, &tw_dev->flags)) 1930 return SCSI_MLQUEUE_HOST_BUSY; 1931 1932 /* Save done function into struct scsi_cmnd */ 1933 SCpnt->scsi_done = done; 1934 1935 /* Queue the command and get a request id */ 1936 tw_state_request_start(tw_dev, &request_id); 1937 1938 /* Save the scsi command for use by the ISR */ 1939 tw_dev->srb[request_id] = SCpnt; 1940 1941 switch (*command) { 1942 case READ_10: 1943 case READ_6: 1944 case WRITE_10: 1945 case WRITE_6: 1946 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ/WRITE.\n"); 1947 retval = tw_scsiop_read_write(tw_dev, request_id); 1948 break; 1949 case TEST_UNIT_READY: 1950 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught TEST_UNIT_READY.\n"); 1951 retval = tw_scsiop_test_unit_ready(tw_dev, request_id); 1952 break; 1953 case INQUIRY: 1954 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught INQUIRY.\n"); 1955 retval = tw_scsiop_inquiry(tw_dev, request_id); 1956 break; 1957 case READ_CAPACITY: 1958 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ_CAPACITY.\n"); 1959 retval = tw_scsiop_read_capacity(tw_dev, request_id); 1960 break; 1961 case REQUEST_SENSE: 1962 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught REQUEST_SENSE.\n"); 1963 retval = tw_scsiop_request_sense(tw_dev, request_id); 1964 break; 1965 case MODE_SENSE: 1966 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught MODE_SENSE.\n"); 1967 retval = tw_scsiop_mode_sense(tw_dev, request_id); 1968 break; 1969 case SYNCHRONIZE_CACHE: 1970 dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught SYNCHRONIZE_CACHE.\n"); 1971 retval = tw_scsiop_synchronize_cache(tw_dev, request_id); 1972 break; 1973 case TW_IOCTL: 1974 printk(KERN_WARNING "3w-xxxx: SCSI_IOCTL_SEND_COMMAND deprecated, please update your 3ware tools.\n"); 1975 break; 1976 default: 1977 printk(KERN_NOTICE "3w-xxxx: scsi%d: Unknown scsi opcode: 0x%x\n", tw_dev->host->host_no, *command); 1978 tw_dev->state[request_id] = TW_S_COMPLETED; 1979 tw_state_request_finish(tw_dev, request_id); 1980 scsi_build_sense(SCpnt, 1, ILLEGAL_REQUEST, 0x20, 0); 1981 done(SCpnt); 1982 retval = 0; 1983 } 1984 if (retval) { 1985 tw_dev->state[request_id] = TW_S_COMPLETED; 1986 tw_state_request_finish(tw_dev, request_id); 1987 SCpnt->result = (DID_ERROR << 16); 1988 done(SCpnt); 1989 retval = 0; 1990 } 1991 return retval; 1992 } /* End tw_scsi_queue() */ 1993 1994 static DEF_SCSI_QCMD(tw_scsi_queue) 1995 1996 /* This function is the interrupt service routine */ 1997 static irqreturn_t tw_interrupt(int irq, void *dev_instance) 1998 { 1999 int request_id; 2000 u32 status_reg_value; 2001 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance; 2002 TW_Response_Queue response_que; 2003 int error = 0, retval = 0; 2004 TW_Command *command_packet; 2005 int handled = 0; 2006 2007 /* Get the host lock for io completions */ 2008 spin_lock(tw_dev->host->host_lock); 2009 2010 /* Read the registers */ 2011 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev)); 2012 2013 /* Check if this is our interrupt, otherwise bail */ 2014 if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT)) 2015 goto tw_interrupt_bail; 2016 2017 handled = 1; 2018 2019 /* If we are resetting, bail */ 2020 if (test_bit(TW_IN_RESET, &tw_dev->flags)) 2021 goto tw_interrupt_bail; 2022 2023 /* Check controller for errors */ 2024 if (tw_check_bits(status_reg_value)) { 2025 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n"); 2026 if (tw_decode_bits(tw_dev, status_reg_value, 1)) { 2027 TW_CLEAR_ALL_INTERRUPTS(tw_dev); 2028 goto tw_interrupt_bail; 2029 } 2030 } 2031 2032 /* Handle host interrupt */ 2033 if (status_reg_value & TW_STATUS_HOST_INTERRUPT) { 2034 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received host interrupt.\n"); 2035 TW_CLEAR_HOST_INTERRUPT(tw_dev); 2036 } 2037 2038 /* Handle attention interrupt */ 2039 if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) { 2040 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received attention interrupt.\n"); 2041 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev); 2042 tw_state_request_start(tw_dev, &request_id); 2043 error = tw_aen_read_queue(tw_dev, request_id); 2044 if (error) { 2045 printk(KERN_WARNING "3w-xxxx: scsi%d: Error reading aen queue.\n", tw_dev->host->host_no); 2046 tw_dev->state[request_id] = TW_S_COMPLETED; 2047 tw_state_request_finish(tw_dev, request_id); 2048 } 2049 } 2050 2051 /* Handle command interrupt */ 2052 if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) { 2053 /* Drain as many pending commands as we can */ 2054 while (tw_dev->pending_request_count > 0) { 2055 request_id = tw_dev->pending_queue[tw_dev->pending_head]; 2056 if (tw_dev->state[request_id] != TW_S_PENDING) { 2057 printk(KERN_WARNING "3w-xxxx: scsi%d: Found request id that wasn't pending.\n", tw_dev->host->host_no); 2058 break; 2059 } 2060 if (tw_post_command_packet(tw_dev, request_id)==0) { 2061 if (tw_dev->pending_head == TW_Q_LENGTH-1) { 2062 tw_dev->pending_head = TW_Q_START; 2063 } else { 2064 tw_dev->pending_head = tw_dev->pending_head + 1; 2065 } 2066 tw_dev->pending_request_count--; 2067 } else { 2068 /* If we get here, we will continue re-posting on the next command interrupt */ 2069 break; 2070 } 2071 } 2072 /* If there are no more pending requests, we mask command interrupt */ 2073 if (tw_dev->pending_request_count == 0) 2074 TW_MASK_COMMAND_INTERRUPT(tw_dev); 2075 } 2076 2077 /* Handle response interrupt */ 2078 if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) { 2079 /* Drain the response queue from the board */ 2080 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) { 2081 /* Read response queue register */ 2082 response_que.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev)); 2083 request_id = TW_RESID_OUT(response_que.response_id); 2084 command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id]; 2085 error = 0; 2086 2087 /* Check for bad response */ 2088 if (command_packet->status != 0) { 2089 /* If internal command, don't error, don't fill sense */ 2090 if (tw_dev->srb[request_id] == NULL) { 2091 tw_decode_sense(tw_dev, request_id, 0); 2092 } else { 2093 error = tw_decode_sense(tw_dev, request_id, 1); 2094 } 2095 } 2096 2097 /* Check for correct state */ 2098 if (tw_dev->state[request_id] != TW_S_POSTED) { 2099 if (tw_dev->srb[request_id] != NULL) { 2100 printk(KERN_WARNING "3w-xxxx: scsi%d: Received a request id that wasn't posted.\n", tw_dev->host->host_no); 2101 error = 1; 2102 } 2103 } 2104 2105 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Response queue request id: %d.\n", request_id); 2106 2107 /* Check for internal command completion */ 2108 if (tw_dev->srb[request_id] == NULL) { 2109 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Found internally posted command.\n"); 2110 /* Check for chrdev ioctl completion */ 2111 if (request_id != tw_dev->chrdev_request_id) { 2112 retval = tw_aen_complete(tw_dev, request_id); 2113 if (retval) { 2114 printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing aen.\n", tw_dev->host->host_no); 2115 } 2116 } else { 2117 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; 2118 wake_up(&tw_dev->ioctl_wqueue); 2119 } 2120 } else { 2121 switch (tw_dev->srb[request_id]->cmnd[0]) { 2122 case READ_10: 2123 case READ_6: 2124 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_10/READ_6\n"); 2125 break; 2126 case WRITE_10: 2127 case WRITE_6: 2128 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught WRITE_10/WRITE_6\n"); 2129 break; 2130 case TEST_UNIT_READY: 2131 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught TEST_UNIT_READY\n"); 2132 error = tw_scsiop_test_unit_ready_complete(tw_dev, request_id); 2133 break; 2134 case INQUIRY: 2135 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught INQUIRY\n"); 2136 error = tw_scsiop_inquiry_complete(tw_dev, request_id); 2137 break; 2138 case READ_CAPACITY: 2139 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_CAPACITY\n"); 2140 error = tw_scsiop_read_capacity_complete(tw_dev, request_id); 2141 break; 2142 case MODE_SENSE: 2143 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught MODE_SENSE\n"); 2144 error = tw_scsiop_mode_sense_complete(tw_dev, request_id); 2145 break; 2146 case SYNCHRONIZE_CACHE: 2147 dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught SYNCHRONIZE_CACHE\n"); 2148 break; 2149 default: 2150 printk(KERN_WARNING "3w-xxxx: case slip in tw_interrupt()\n"); 2151 error = 1; 2152 } 2153 2154 /* If no error command was a success */ 2155 if (error == 0) { 2156 tw_dev->srb[request_id]->result = (DID_OK << 16); 2157 } 2158 2159 /* If error, command failed */ 2160 if (error == 1) { 2161 /* Ask for a host reset */ 2162 tw_dev->srb[request_id]->result = (DID_OK << 16) | SAM_STAT_CHECK_CONDITION; 2163 } 2164 2165 /* Now complete the io */ 2166 if ((error != TW_ISR_DONT_COMPLETE)) { 2167 scsi_dma_unmap(tw_dev->srb[request_id]); 2168 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]); 2169 tw_dev->state[request_id] = TW_S_COMPLETED; 2170 tw_state_request_finish(tw_dev, request_id); 2171 tw_dev->posted_request_count--; 2172 } 2173 } 2174 2175 /* Check for valid status after each drain */ 2176 status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev)); 2177 if (tw_check_bits(status_reg_value)) { 2178 dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n"); 2179 if (tw_decode_bits(tw_dev, status_reg_value, 1)) { 2180 TW_CLEAR_ALL_INTERRUPTS(tw_dev); 2181 goto tw_interrupt_bail; 2182 } 2183 } 2184 } 2185 } 2186 2187 tw_interrupt_bail: 2188 spin_unlock(tw_dev->host->host_lock); 2189 return IRQ_RETVAL(handled); 2190 } /* End tw_interrupt() */ 2191 2192 /* This function tells the controller to shut down */ 2193 static void __tw_shutdown(TW_Device_Extension *tw_dev) 2194 { 2195 /* Disable interrupts */ 2196 TW_DISABLE_INTERRUPTS(tw_dev); 2197 2198 /* Free up the IRQ */ 2199 free_irq(tw_dev->tw_pci_dev->irq, tw_dev); 2200 2201 printk(KERN_WARNING "3w-xxxx: Shutting down host %d.\n", tw_dev->host->host_no); 2202 2203 /* Tell the card we are shutting down */ 2204 if (tw_initconnection(tw_dev, 1)) { 2205 printk(KERN_WARNING "3w-xxxx: Connection shutdown failed.\n"); 2206 } else { 2207 printk(KERN_WARNING "3w-xxxx: Shutdown complete.\n"); 2208 } 2209 2210 /* Clear all interrupts just before exit */ 2211 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev); 2212 } /* End __tw_shutdown() */ 2213 2214 /* Wrapper for __tw_shutdown */ 2215 static void tw_shutdown(struct pci_dev *pdev) 2216 { 2217 struct Scsi_Host *host = pci_get_drvdata(pdev); 2218 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; 2219 2220 __tw_shutdown(tw_dev); 2221 } /* End tw_shutdown() */ 2222 2223 /* This function gets called when a disk is coming online */ 2224 static int tw_slave_configure(struct scsi_device *sdev) 2225 { 2226 /* Force 60 second timeout */ 2227 blk_queue_rq_timeout(sdev->request_queue, 60 * HZ); 2228 2229 return 0; 2230 } /* End tw_slave_configure() */ 2231 2232 static struct scsi_host_template driver_template = { 2233 .module = THIS_MODULE, 2234 .name = "3ware Storage Controller", 2235 .queuecommand = tw_scsi_queue, 2236 .eh_host_reset_handler = tw_scsi_eh_reset, 2237 .bios_param = tw_scsi_biosparam, 2238 .change_queue_depth = scsi_change_queue_depth, 2239 .can_queue = TW_Q_LENGTH-2, 2240 .slave_configure = tw_slave_configure, 2241 .this_id = -1, 2242 .sg_tablesize = TW_MAX_SGL_LENGTH, 2243 .max_sectors = TW_MAX_SECTORS, 2244 .cmd_per_lun = TW_MAX_CMDS_PER_LUN, 2245 .shost_attrs = tw_host_attrs, 2246 .emulated = 1, 2247 .no_write_same = 1, 2248 }; 2249 2250 /* This function will probe and initialize a card */ 2251 static int tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id) 2252 { 2253 struct Scsi_Host *host = NULL; 2254 TW_Device_Extension *tw_dev; 2255 int retval = -ENODEV; 2256 2257 retval = pci_enable_device(pdev); 2258 if (retval) { 2259 printk(KERN_WARNING "3w-xxxx: Failed to enable pci device."); 2260 goto out_disable_device; 2261 } 2262 2263 pci_set_master(pdev); 2264 2265 retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 2266 if (retval) { 2267 printk(KERN_WARNING "3w-xxxx: Failed to set dma mask."); 2268 goto out_disable_device; 2269 } 2270 2271 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension)); 2272 if (!host) { 2273 printk(KERN_WARNING "3w-xxxx: Failed to allocate memory for device extension."); 2274 retval = -ENOMEM; 2275 goto out_disable_device; 2276 } 2277 tw_dev = (TW_Device_Extension *)host->hostdata; 2278 2279 /* Save values to device extension */ 2280 tw_dev->host = host; 2281 tw_dev->tw_pci_dev = pdev; 2282 2283 if (tw_initialize_device_extension(tw_dev)) { 2284 printk(KERN_WARNING "3w-xxxx: Failed to initialize device extension."); 2285 retval = -ENOMEM; 2286 goto out_free_device_extension; 2287 } 2288 2289 /* Request IO regions */ 2290 retval = pci_request_regions(pdev, "3w-xxxx"); 2291 if (retval) { 2292 printk(KERN_WARNING "3w-xxxx: Failed to get mem region."); 2293 goto out_free_device_extension; 2294 } 2295 2296 /* Save base address */ 2297 tw_dev->base_addr = pci_resource_start(pdev, 0); 2298 if (!tw_dev->base_addr) { 2299 printk(KERN_WARNING "3w-xxxx: Failed to get io address."); 2300 retval = -ENOMEM; 2301 goto out_release_mem_region; 2302 } 2303 2304 /* Disable interrupts on the card */ 2305 TW_DISABLE_INTERRUPTS(tw_dev); 2306 2307 /* Initialize the card */ 2308 if (tw_reset_sequence(tw_dev)) 2309 goto out_release_mem_region; 2310 2311 /* Set host specific parameters */ 2312 host->max_id = TW_MAX_UNITS; 2313 host->max_cmd_len = TW_MAX_CDB_LEN; 2314 2315 /* Luns and channels aren't supported by adapter */ 2316 host->max_lun = 0; 2317 host->max_channel = 0; 2318 2319 /* Register the card with the kernel SCSI layer */ 2320 retval = scsi_add_host(host, &pdev->dev); 2321 if (retval) { 2322 printk(KERN_WARNING "3w-xxxx: scsi add host failed"); 2323 goto out_release_mem_region; 2324 } 2325 2326 pci_set_drvdata(pdev, host); 2327 2328 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); 2329 2330 /* Now setup the interrupt handler */ 2331 retval = request_irq(pdev->irq, tw_interrupt, IRQF_SHARED, "3w-xxxx", tw_dev); 2332 if (retval) { 2333 printk(KERN_WARNING "3w-xxxx: Error requesting IRQ."); 2334 goto out_remove_host; 2335 } 2336 2337 tw_device_extension_list[tw_device_extension_count] = tw_dev; 2338 tw_device_extension_count++; 2339 2340 /* Re-enable interrupts on the card */ 2341 TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev); 2342 2343 /* Finally, scan the host */ 2344 scsi_scan_host(host); 2345 2346 if (twe_major == -1) { 2347 if ((twe_major = register_chrdev (0, "twe", &tw_fops)) < 0) 2348 printk(KERN_WARNING "3w-xxxx: Failed to register character device."); 2349 } 2350 return 0; 2351 2352 out_remove_host: 2353 scsi_remove_host(host); 2354 out_release_mem_region: 2355 pci_release_regions(pdev); 2356 out_free_device_extension: 2357 tw_free_device_extension(tw_dev); 2358 scsi_host_put(host); 2359 out_disable_device: 2360 pci_disable_device(pdev); 2361 2362 return retval; 2363 } /* End tw_probe() */ 2364 2365 /* This function is called to remove a device */ 2366 static void tw_remove(struct pci_dev *pdev) 2367 { 2368 struct Scsi_Host *host = pci_get_drvdata(pdev); 2369 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; 2370 2371 scsi_remove_host(tw_dev->host); 2372 2373 /* Unregister character device */ 2374 if (twe_major >= 0) { 2375 unregister_chrdev(twe_major, "twe"); 2376 twe_major = -1; 2377 } 2378 2379 /* Shutdown the card */ 2380 __tw_shutdown(tw_dev); 2381 2382 /* Free up the mem region */ 2383 pci_release_regions(pdev); 2384 2385 /* Free up device extension resources */ 2386 tw_free_device_extension(tw_dev); 2387 2388 scsi_host_put(tw_dev->host); 2389 pci_disable_device(pdev); 2390 tw_device_extension_count--; 2391 } /* End tw_remove() */ 2392 2393 /* PCI Devices supported by this driver */ 2394 static struct pci_device_id tw_pci_tbl[] = { 2395 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_1000, 2396 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 2397 { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_7000, 2398 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 2399 { } 2400 }; 2401 MODULE_DEVICE_TABLE(pci, tw_pci_tbl); 2402 2403 /* pci_driver initializer */ 2404 static struct pci_driver tw_driver = { 2405 .name = "3w-xxxx", 2406 .id_table = tw_pci_tbl, 2407 .probe = tw_probe, 2408 .remove = tw_remove, 2409 .shutdown = tw_shutdown, 2410 }; 2411 2412 /* This function is called on driver initialization */ 2413 static int __init tw_init(void) 2414 { 2415 printk(KERN_WARNING "3ware Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION); 2416 2417 return pci_register_driver(&tw_driver); 2418 } /* End tw_init() */ 2419 2420 /* This function is called on driver exit */ 2421 static void __exit tw_exit(void) 2422 { 2423 pci_unregister_driver(&tw_driver); 2424 } /* End tw_exit() */ 2425 2426 module_init(tw_init); 2427 module_exit(tw_exit); 2428 2429