1 /* 2 3w-sas.c -- LSI 3ware SAS/SATA-RAID Controller device driver for Linux. 3 4 Written By: Adam Radford <aradford@gmail.com> 5 6 Copyright (C) 2009 LSI Corporation. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; version 2 of the License. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 NO WARRANTY 18 THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR 19 CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT 20 LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, 21 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is 22 solely responsible for determining the appropriateness of using and 23 distributing the Program and assumes all risks associated with its 24 exercise of rights under this Agreement, including but not limited to 25 the risks and costs of program errors, damage to or loss of data, 26 programs or equipment, and unavailability or interruption of operations. 27 28 DISCLAIMER OF LIABILITY 29 NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY 30 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND 32 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 33 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 34 USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED 35 HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES 36 37 You should have received a copy of the GNU General Public License 38 along with this program; if not, write to the Free Software 39 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 40 41 Controllers supported by this driver: 42 43 LSI 3ware 9750 6Gb/s SAS/SATA-RAID 44 45 Bugs/Comments/Suggestions should be mailed to: 46 aradford@gmail.com 47 48 History 49 ------- 50 3.26.02.000 - Initial driver release. 51 */ 52 53 #include <linux/module.h> 54 #include <linux/reboot.h> 55 #include <linux/spinlock.h> 56 #include <linux/interrupt.h> 57 #include <linux/moduleparam.h> 58 #include <linux/errno.h> 59 #include <linux/types.h> 60 #include <linux/delay.h> 61 #include <linux/pci.h> 62 #include <linux/time.h> 63 #include <linux/mutex.h> 64 #include <linux/slab.h> 65 #include <asm/io.h> 66 #include <asm/irq.h> 67 #include <linux/uaccess.h> 68 #include <scsi/scsi.h> 69 #include <scsi/scsi_host.h> 70 #include <scsi/scsi_tcq.h> 71 #include <scsi/scsi_cmnd.h> 72 #include "3w-sas.h" 73 74 /* Globals */ 75 #define TW_DRIVER_VERSION "3.26.02.000" 76 static DEFINE_MUTEX(twl_chrdev_mutex); 77 static TW_Device_Extension *twl_device_extension_list[TW_MAX_SLOT]; 78 static unsigned int twl_device_extension_count; 79 static int twl_major = -1; 80 extern struct timezone sys_tz; 81 82 /* Module parameters */ 83 MODULE_AUTHOR ("LSI"); 84 MODULE_DESCRIPTION ("LSI 3ware SAS/SATA-RAID Linux Driver"); 85 MODULE_LICENSE("GPL"); 86 MODULE_VERSION(TW_DRIVER_VERSION); 87 88 static int use_msi; 89 module_param(use_msi, int, S_IRUGO); 90 MODULE_PARM_DESC(use_msi, "Use Message Signaled Interrupts. Default: 0"); 91 92 /* Function prototypes */ 93 static int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset); 94 95 /* Functions */ 96 97 /* This function returns AENs through sysfs */ 98 static ssize_t twl_sysfs_aen_read(struct file *filp, struct kobject *kobj, 99 struct bin_attribute *bin_attr, 100 char *outbuf, loff_t offset, size_t count) 101 { 102 struct device *dev = container_of(kobj, struct device, kobj); 103 struct Scsi_Host *shost = class_to_shost(dev); 104 TW_Device_Extension *tw_dev = (TW_Device_Extension *)shost->hostdata; 105 unsigned long flags = 0; 106 ssize_t ret; 107 108 if (!capable(CAP_SYS_ADMIN)) 109 return -EACCES; 110 111 spin_lock_irqsave(tw_dev->host->host_lock, flags); 112 ret = memory_read_from_buffer(outbuf, count, &offset, tw_dev->event_queue[0], sizeof(TW_Event) * TW_Q_LENGTH); 113 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 114 115 return ret; 116 } /* End twl_sysfs_aen_read() */ 117 118 /* aen_read sysfs attribute initializer */ 119 static struct bin_attribute twl_sysfs_aen_read_attr = { 120 .attr = { 121 .name = "3ware_aen_read", 122 .mode = S_IRUSR, 123 }, 124 .size = 0, 125 .read = twl_sysfs_aen_read 126 }; 127 128 /* This function returns driver compatibility info through sysfs */ 129 static ssize_t twl_sysfs_compat_info(struct file *filp, struct kobject *kobj, 130 struct bin_attribute *bin_attr, 131 char *outbuf, loff_t offset, size_t count) 132 { 133 struct device *dev = container_of(kobj, struct device, kobj); 134 struct Scsi_Host *shost = class_to_shost(dev); 135 TW_Device_Extension *tw_dev = (TW_Device_Extension *)shost->hostdata; 136 unsigned long flags = 0; 137 ssize_t ret; 138 139 if (!capable(CAP_SYS_ADMIN)) 140 return -EACCES; 141 142 spin_lock_irqsave(tw_dev->host->host_lock, flags); 143 ret = memory_read_from_buffer(outbuf, count, &offset, &tw_dev->tw_compat_info, sizeof(TW_Compatibility_Info)); 144 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 145 146 return ret; 147 } /* End twl_sysfs_compat_info() */ 148 149 /* compat_info sysfs attribute initializer */ 150 static struct bin_attribute twl_sysfs_compat_info_attr = { 151 .attr = { 152 .name = "3ware_compat_info", 153 .mode = S_IRUSR, 154 }, 155 .size = 0, 156 .read = twl_sysfs_compat_info 157 }; 158 159 /* Show some statistics about the card */ 160 static ssize_t twl_show_stats(struct device *dev, 161 struct device_attribute *attr, char *buf) 162 { 163 struct Scsi_Host *host = class_to_shost(dev); 164 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; 165 unsigned long flags = 0; 166 ssize_t len; 167 168 spin_lock_irqsave(tw_dev->host->host_lock, flags); 169 len = snprintf(buf, PAGE_SIZE, "3w-sas Driver version: %s\n" 170 "Current commands posted: %4d\n" 171 "Max commands posted: %4d\n" 172 "Last sgl length: %4d\n" 173 "Max sgl length: %4d\n" 174 "Last sector count: %4d\n" 175 "Max sector count: %4d\n" 176 "SCSI Host Resets: %4d\n" 177 "AEN's: %4d\n", 178 TW_DRIVER_VERSION, 179 tw_dev->posted_request_count, 180 tw_dev->max_posted_request_count, 181 tw_dev->sgl_entries, 182 tw_dev->max_sgl_entries, 183 tw_dev->sector_count, 184 tw_dev->max_sector_count, 185 tw_dev->num_resets, 186 tw_dev->aen_count); 187 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 188 return len; 189 } /* End twl_show_stats() */ 190 191 /* stats sysfs attribute initializer */ 192 static struct device_attribute twl_host_stats_attr = { 193 .attr = { 194 .name = "3ware_stats", 195 .mode = S_IRUGO, 196 }, 197 .show = twl_show_stats 198 }; 199 200 /* Host attributes initializer */ 201 static struct device_attribute *twl_host_attrs[] = { 202 &twl_host_stats_attr, 203 NULL, 204 }; 205 206 /* This function will look up an AEN severity string */ 207 static char *twl_aen_severity_lookup(unsigned char severity_code) 208 { 209 char *retval = NULL; 210 211 if ((severity_code < (unsigned char) TW_AEN_SEVERITY_ERROR) || 212 (severity_code > (unsigned char) TW_AEN_SEVERITY_DEBUG)) 213 goto out; 214 215 retval = twl_aen_severity_table[severity_code]; 216 out: 217 return retval; 218 } /* End twl_aen_severity_lookup() */ 219 220 /* This function will queue an event */ 221 static void twl_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header) 222 { 223 u32 local_time; 224 TW_Event *event; 225 unsigned short aen; 226 char host[16]; 227 char *error_str; 228 229 tw_dev->aen_count++; 230 231 /* Fill out event info */ 232 event = tw_dev->event_queue[tw_dev->error_index]; 233 234 host[0] = '\0'; 235 if (tw_dev->host) 236 sprintf(host, " scsi%d:", tw_dev->host->host_no); 237 238 aen = le16_to_cpu(header->status_block.error); 239 memset(event, 0, sizeof(TW_Event)); 240 241 event->severity = TW_SEV_OUT(header->status_block.severity__reserved); 242 /* event->time_stamp_sec overflows in y2106 */ 243 local_time = (u32)(ktime_get_real_seconds() - (sys_tz.tz_minuteswest * 60)); 244 event->time_stamp_sec = local_time; 245 event->aen_code = aen; 246 event->retrieved = TW_AEN_NOT_RETRIEVED; 247 event->sequence_id = tw_dev->error_sequence_id; 248 tw_dev->error_sequence_id++; 249 250 /* Check for embedded error string */ 251 error_str = &(header->err_specific_desc[strlen(header->err_specific_desc)+1]); 252 253 header->err_specific_desc[sizeof(header->err_specific_desc) - 1] = '\0'; 254 event->parameter_len = strlen(header->err_specific_desc); 255 memcpy(event->parameter_data, header->err_specific_desc, event->parameter_len + 1 + strlen(error_str)); 256 if (event->severity != TW_AEN_SEVERITY_DEBUG) 257 printk(KERN_WARNING "3w-sas:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n", 258 host, 259 twl_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)), 260 TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen, error_str, 261 header->err_specific_desc); 262 else 263 tw_dev->aen_count--; 264 265 tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH; 266 } /* End twl_aen_queue_event() */ 267 268 /* This function will attempt to post a command packet to the board */ 269 static int twl_post_command_packet(TW_Device_Extension *tw_dev, int request_id) 270 { 271 dma_addr_t command_que_value; 272 273 command_que_value = tw_dev->command_packet_phys[request_id]; 274 command_que_value += TW_COMMAND_OFFSET; 275 276 /* First write upper 4 bytes */ 277 writel((u32)((u64)command_que_value >> 32), TWL_HIBQPH_REG_ADDR(tw_dev)); 278 /* Then the lower 4 bytes */ 279 writel((u32)(command_que_value | TWL_PULL_MODE), TWL_HIBQPL_REG_ADDR(tw_dev)); 280 281 tw_dev->state[request_id] = TW_S_POSTED; 282 tw_dev->posted_request_count++; 283 if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) 284 tw_dev->max_posted_request_count = tw_dev->posted_request_count; 285 286 return 0; 287 } /* End twl_post_command_packet() */ 288 289 /* This function hands scsi cdb's to the firmware */ 290 static int twl_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, 291 unsigned char *cdb, int use_sg, 292 TW_SG_Entry_ISO *sglistarg) 293 { 294 TW_Command_Full *full_command_packet; 295 TW_Command_Apache *command_packet; 296 int i, sg_count; 297 struct scsi_cmnd *srb = NULL; 298 struct scatterlist *sglist = NULL, *sg; 299 int retval = 1; 300 301 if (tw_dev->srb[request_id]) { 302 srb = tw_dev->srb[request_id]; 303 if (scsi_sglist(srb)) 304 sglist = scsi_sglist(srb); 305 } 306 307 /* Initialize command packet */ 308 full_command_packet = tw_dev->command_packet_virt[request_id]; 309 full_command_packet->header.header_desc.size_header = 128; 310 full_command_packet->header.status_block.error = 0; 311 full_command_packet->header.status_block.severity__reserved = 0; 312 313 command_packet = &full_command_packet->command.newcommand; 314 command_packet->status = 0; 315 command_packet->opcode__reserved = TW_OPRES_IN(0, TW_OP_EXECUTE_SCSI); 316 317 /* We forced 16 byte cdb use earlier */ 318 if (!cdb) 319 memcpy(command_packet->cdb, srb->cmnd, TW_MAX_CDB_LEN); 320 else 321 memcpy(command_packet->cdb, cdb, TW_MAX_CDB_LEN); 322 323 if (srb) { 324 command_packet->unit = srb->device->id; 325 command_packet->request_id__lunl = 326 cpu_to_le16(TW_REQ_LUN_IN(srb->device->lun, request_id)); 327 } else { 328 command_packet->request_id__lunl = 329 cpu_to_le16(TW_REQ_LUN_IN(0, request_id)); 330 command_packet->unit = 0; 331 } 332 333 command_packet->sgl_offset = 16; 334 335 if (!sglistarg) { 336 /* Map sglist from scsi layer to cmd packet */ 337 if (scsi_sg_count(srb)) { 338 sg_count = scsi_dma_map(srb); 339 if (sg_count <= 0) 340 goto out; 341 342 scsi_for_each_sg(srb, sg, sg_count, i) { 343 command_packet->sg_list[i].address = TW_CPU_TO_SGL(sg_dma_address(sg)); 344 command_packet->sg_list[i].length = TW_CPU_TO_SGL(sg_dma_len(sg)); 345 } 346 command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN((srb->device->lun >> 4), scsi_sg_count(tw_dev->srb[request_id]))); 347 } 348 } else { 349 /* Internal cdb post */ 350 for (i = 0; i < use_sg; i++) { 351 command_packet->sg_list[i].address = TW_CPU_TO_SGL(sglistarg[i].address); 352 command_packet->sg_list[i].length = TW_CPU_TO_SGL(sglistarg[i].length); 353 } 354 command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN(0, use_sg)); 355 } 356 357 /* Update some stats */ 358 if (srb) { 359 tw_dev->sector_count = scsi_bufflen(srb) / 512; 360 if (tw_dev->sector_count > tw_dev->max_sector_count) 361 tw_dev->max_sector_count = tw_dev->sector_count; 362 tw_dev->sgl_entries = scsi_sg_count(srb); 363 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries) 364 tw_dev->max_sgl_entries = tw_dev->sgl_entries; 365 } 366 367 /* Now post the command to the board */ 368 retval = twl_post_command_packet(tw_dev, request_id); 369 370 out: 371 return retval; 372 } /* End twl_scsiop_execute_scsi() */ 373 374 /* This function will read the aen queue from the isr */ 375 static int twl_aen_read_queue(TW_Device_Extension *tw_dev, int request_id) 376 { 377 unsigned char cdb[TW_MAX_CDB_LEN]; 378 TW_SG_Entry_ISO sglist[1]; 379 TW_Command_Full *full_command_packet; 380 int retval = 1; 381 382 full_command_packet = tw_dev->command_packet_virt[request_id]; 383 memset(full_command_packet, 0, sizeof(TW_Command_Full)); 384 385 /* Initialize cdb */ 386 memset(&cdb, 0, TW_MAX_CDB_LEN); 387 cdb[0] = REQUEST_SENSE; /* opcode */ 388 cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */ 389 390 /* Initialize sglist */ 391 memset(&sglist, 0, sizeof(TW_SG_Entry_ISO)); 392 sglist[0].length = TW_SECTOR_SIZE; 393 sglist[0].address = tw_dev->generic_buffer_phys[request_id]; 394 395 /* Mark internal command */ 396 tw_dev->srb[request_id] = NULL; 397 398 /* Now post the command packet */ 399 if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) { 400 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Post failed while reading AEN queue"); 401 goto out; 402 } 403 retval = 0; 404 out: 405 return retval; 406 } /* End twl_aen_read_queue() */ 407 408 /* This function will sync firmware time with the host time */ 409 static void twl_aen_sync_time(TW_Device_Extension *tw_dev, int request_id) 410 { 411 u32 schedulertime; 412 TW_Command_Full *full_command_packet; 413 TW_Command *command_packet; 414 TW_Param_Apache *param; 415 time64_t local_time; 416 417 /* Fill out the command packet */ 418 full_command_packet = tw_dev->command_packet_virt[request_id]; 419 memset(full_command_packet, 0, sizeof(TW_Command_Full)); 420 command_packet = &full_command_packet->command.oldcommand; 421 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM); 422 command_packet->request_id = request_id; 423 command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]); 424 command_packet->byte8_offset.param.sgl[0].length = TW_CPU_TO_SGL(TW_SECTOR_SIZE); 425 command_packet->size = TW_COMMAND_SIZE; 426 command_packet->byte6_offset.parameter_count = cpu_to_le16(1); 427 428 /* Setup the param */ 429 param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id]; 430 memset(param, 0, TW_SECTOR_SIZE); 431 param->table_id = cpu_to_le16(TW_TIMEKEEP_TABLE | 0x8000); /* Controller time keep table */ 432 param->parameter_id = cpu_to_le16(0x3); /* SchedulerTime */ 433 param->parameter_size_bytes = cpu_to_le16(4); 434 435 /* Convert system time in UTC to local time seconds since last 436 Sunday 12:00AM */ 437 local_time = (ktime_get_real_seconds() - (sys_tz.tz_minuteswest * 60)); 438 div_u64_rem(local_time - (3 * 86400), 604800, &schedulertime); 439 schedulertime = cpu_to_le32(schedulertime); 440 441 memcpy(param->data, &schedulertime, sizeof(u32)); 442 443 /* Mark internal command */ 444 tw_dev->srb[request_id] = NULL; 445 446 /* Now post the command */ 447 twl_post_command_packet(tw_dev, request_id); 448 } /* End twl_aen_sync_time() */ 449 450 /* This function will assign an available request id */ 451 static void twl_get_request_id(TW_Device_Extension *tw_dev, int *request_id) 452 { 453 *request_id = tw_dev->free_queue[tw_dev->free_head]; 454 tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH; 455 tw_dev->state[*request_id] = TW_S_STARTED; 456 } /* End twl_get_request_id() */ 457 458 /* This function will free a request id */ 459 static void twl_free_request_id(TW_Device_Extension *tw_dev, int request_id) 460 { 461 tw_dev->free_queue[tw_dev->free_tail] = request_id; 462 tw_dev->state[request_id] = TW_S_FINISHED; 463 tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH; 464 } /* End twl_free_request_id() */ 465 466 /* This function will complete an aen request from the isr */ 467 static int twl_aen_complete(TW_Device_Extension *tw_dev, int request_id) 468 { 469 TW_Command_Full *full_command_packet; 470 TW_Command *command_packet; 471 TW_Command_Apache_Header *header; 472 unsigned short aen; 473 int retval = 1; 474 475 header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id]; 476 tw_dev->posted_request_count--; 477 aen = le16_to_cpu(header->status_block.error); 478 full_command_packet = tw_dev->command_packet_virt[request_id]; 479 command_packet = &full_command_packet->command.oldcommand; 480 481 /* First check for internal completion of set param for time sync */ 482 if (TW_OP_OUT(command_packet->opcode__sgloffset) == TW_OP_SET_PARAM) { 483 /* Keep reading the queue in case there are more aen's */ 484 if (twl_aen_read_queue(tw_dev, request_id)) 485 goto out2; 486 else { 487 retval = 0; 488 goto out; 489 } 490 } 491 492 switch (aen) { 493 case TW_AEN_QUEUE_EMPTY: 494 /* Quit reading the queue if this is the last one */ 495 break; 496 case TW_AEN_SYNC_TIME_WITH_HOST: 497 twl_aen_sync_time(tw_dev, request_id); 498 retval = 0; 499 goto out; 500 default: 501 twl_aen_queue_event(tw_dev, header); 502 503 /* If there are more aen's, keep reading the queue */ 504 if (twl_aen_read_queue(tw_dev, request_id)) 505 goto out2; 506 else { 507 retval = 0; 508 goto out; 509 } 510 } 511 retval = 0; 512 out2: 513 tw_dev->state[request_id] = TW_S_COMPLETED; 514 twl_free_request_id(tw_dev, request_id); 515 clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags); 516 out: 517 return retval; 518 } /* End twl_aen_complete() */ 519 520 /* This function will poll for a response */ 521 static int twl_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds) 522 { 523 unsigned long before; 524 dma_addr_t mfa; 525 u32 regh, regl; 526 u32 response; 527 int retval = 1; 528 int found = 0; 529 530 before = jiffies; 531 532 while (!found) { 533 if (sizeof(dma_addr_t) > 4) { 534 regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev)); 535 regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev)); 536 mfa = ((u64)regh << 32) | regl; 537 } else 538 mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev)); 539 540 response = (u32)mfa; 541 542 if (TW_RESID_OUT(response) == request_id) 543 found = 1; 544 545 if (time_after(jiffies, before + HZ * seconds)) 546 goto out; 547 548 msleep(50); 549 } 550 retval = 0; 551 out: 552 return retval; 553 } /* End twl_poll_response() */ 554 555 /* This function will drain the aen queue */ 556 static int twl_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset) 557 { 558 int request_id = 0; 559 unsigned char cdb[TW_MAX_CDB_LEN]; 560 TW_SG_Entry_ISO sglist[1]; 561 int finished = 0, count = 0; 562 TW_Command_Full *full_command_packet; 563 TW_Command_Apache_Header *header; 564 unsigned short aen; 565 int first_reset = 0, queue = 0, retval = 1; 566 567 if (no_check_reset) 568 first_reset = 0; 569 else 570 first_reset = 1; 571 572 full_command_packet = tw_dev->command_packet_virt[request_id]; 573 memset(full_command_packet, 0, sizeof(TW_Command_Full)); 574 575 /* Initialize cdb */ 576 memset(&cdb, 0, TW_MAX_CDB_LEN); 577 cdb[0] = REQUEST_SENSE; /* opcode */ 578 cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */ 579 580 /* Initialize sglist */ 581 memset(&sglist, 0, sizeof(TW_SG_Entry_ISO)); 582 sglist[0].length = TW_SECTOR_SIZE; 583 sglist[0].address = tw_dev->generic_buffer_phys[request_id]; 584 585 /* Mark internal command */ 586 tw_dev->srb[request_id] = NULL; 587 588 do { 589 /* Send command to the board */ 590 if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) { 591 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "Error posting request sense"); 592 goto out; 593 } 594 595 /* Now poll for completion */ 596 if (twl_poll_response(tw_dev, request_id, 30)) { 597 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "No valid response while draining AEN queue"); 598 tw_dev->posted_request_count--; 599 goto out; 600 } 601 602 tw_dev->posted_request_count--; 603 header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id]; 604 aen = le16_to_cpu(header->status_block.error); 605 queue = 0; 606 count++; 607 608 switch (aen) { 609 case TW_AEN_QUEUE_EMPTY: 610 if (first_reset != 1) 611 goto out; 612 else 613 finished = 1; 614 break; 615 case TW_AEN_SOFT_RESET: 616 if (first_reset == 0) 617 first_reset = 1; 618 else 619 queue = 1; 620 break; 621 case TW_AEN_SYNC_TIME_WITH_HOST: 622 break; 623 default: 624 queue = 1; 625 } 626 627 /* Now queue an event info */ 628 if (queue) 629 twl_aen_queue_event(tw_dev, header); 630 } while ((finished == 0) && (count < TW_MAX_AEN_DRAIN)); 631 632 if (count == TW_MAX_AEN_DRAIN) 633 goto out; 634 635 retval = 0; 636 out: 637 tw_dev->state[request_id] = TW_S_INITIAL; 638 return retval; 639 } /* End twl_aen_drain_queue() */ 640 641 /* This function will allocate memory and check if it is correctly aligned */ 642 static int twl_allocate_memory(TW_Device_Extension *tw_dev, int size, int which) 643 { 644 int i; 645 dma_addr_t dma_handle; 646 unsigned long *cpu_addr; 647 int retval = 1; 648 649 cpu_addr = dma_zalloc_coherent(&tw_dev->tw_pci_dev->dev, 650 size * TW_Q_LENGTH, &dma_handle, GFP_KERNEL); 651 if (!cpu_addr) { 652 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed"); 653 goto out; 654 } 655 656 for (i = 0; i < TW_Q_LENGTH; i++) { 657 switch(which) { 658 case 0: 659 tw_dev->command_packet_phys[i] = dma_handle+(i*size); 660 tw_dev->command_packet_virt[i] = (TW_Command_Full *)((unsigned char *)cpu_addr + (i*size)); 661 break; 662 case 1: 663 tw_dev->generic_buffer_phys[i] = dma_handle+(i*size); 664 tw_dev->generic_buffer_virt[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size)); 665 break; 666 case 2: 667 tw_dev->sense_buffer_phys[i] = dma_handle+(i*size); 668 tw_dev->sense_buffer_virt[i] = (TW_Command_Apache_Header *)((unsigned char *)cpu_addr + (i*size)); 669 break; 670 } 671 } 672 retval = 0; 673 out: 674 return retval; 675 } /* End twl_allocate_memory() */ 676 677 /* This function will load the request id and various sgls for ioctls */ 678 static void twl_load_sgl(TW_Device_Extension *tw_dev, TW_Command_Full *full_command_packet, int request_id, dma_addr_t dma_handle, int length) 679 { 680 TW_Command *oldcommand; 681 TW_Command_Apache *newcommand; 682 TW_SG_Entry_ISO *sgl; 683 unsigned int pae = 0; 684 685 if ((sizeof(long) < 8) && (sizeof(dma_addr_t) > 4)) 686 pae = 1; 687 688 if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) { 689 newcommand = &full_command_packet->command.newcommand; 690 newcommand->request_id__lunl = 691 cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id)); 692 if (length) { 693 newcommand->sg_list[0].address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1); 694 newcommand->sg_list[0].length = TW_CPU_TO_SGL(length); 695 } 696 newcommand->sgl_entries__lunh = 697 cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), length ? 1 : 0)); 698 } else { 699 oldcommand = &full_command_packet->command.oldcommand; 700 oldcommand->request_id = request_id; 701 702 if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) { 703 /* Load the sg list */ 704 sgl = (TW_SG_Entry_ISO *)((u32 *)oldcommand+oldcommand->size - (sizeof(TW_SG_Entry_ISO)/4) + pae + (sizeof(dma_addr_t) > 4 ? 1 : 0)); 705 sgl->address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1); 706 sgl->length = TW_CPU_TO_SGL(length); 707 oldcommand->size += pae; 708 oldcommand->size += sizeof(dma_addr_t) > 4 ? 1 : 0; 709 } 710 } 711 } /* End twl_load_sgl() */ 712 713 /* This function handles ioctl for the character device 714 This interface is used by smartmontools open source software */ 715 static long twl_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 716 { 717 long timeout; 718 unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0; 719 dma_addr_t dma_handle; 720 int request_id = 0; 721 TW_Ioctl_Driver_Command driver_command; 722 struct inode *inode = file_inode(file); 723 TW_Ioctl_Buf_Apache *tw_ioctl; 724 TW_Command_Full *full_command_packet; 725 TW_Device_Extension *tw_dev = twl_device_extension_list[iminor(inode)]; 726 int retval = -EFAULT; 727 void __user *argp = (void __user *)arg; 728 729 mutex_lock(&twl_chrdev_mutex); 730 731 /* Only let one of these through at a time */ 732 if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) { 733 retval = -EINTR; 734 goto out; 735 } 736 737 /* First copy down the driver command */ 738 if (copy_from_user(&driver_command, argp, sizeof(TW_Ioctl_Driver_Command))) 739 goto out2; 740 741 /* Check data buffer size */ 742 if (driver_command.buffer_length > TW_MAX_SECTORS * 2048) { 743 retval = -EINVAL; 744 goto out2; 745 } 746 747 /* Hardware can only do multiple of 512 byte transfers */ 748 data_buffer_length_adjusted = (driver_command.buffer_length + 511) & ~511; 749 750 /* Now allocate ioctl buf memory */ 751 cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, &dma_handle, GFP_KERNEL); 752 if (!cpu_addr) { 753 retval = -ENOMEM; 754 goto out2; 755 } 756 757 tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr; 758 759 /* Now copy down the entire ioctl */ 760 if (copy_from_user(tw_ioctl, argp, driver_command.buffer_length + sizeof(TW_Ioctl_Buf_Apache) - 1)) 761 goto out3; 762 763 /* See which ioctl we are doing */ 764 switch (cmd) { 765 case TW_IOCTL_FIRMWARE_PASS_THROUGH: 766 spin_lock_irqsave(tw_dev->host->host_lock, flags); 767 twl_get_request_id(tw_dev, &request_id); 768 769 /* Flag internal command */ 770 tw_dev->srb[request_id] = NULL; 771 772 /* Flag chrdev ioctl */ 773 tw_dev->chrdev_request_id = request_id; 774 775 full_command_packet = (TW_Command_Full *)&tw_ioctl->firmware_command; 776 777 /* Load request id and sglist for both command types */ 778 twl_load_sgl(tw_dev, full_command_packet, request_id, dma_handle, data_buffer_length_adjusted); 779 780 memcpy(tw_dev->command_packet_virt[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command_Full)); 781 782 /* Now post the command packet to the controller */ 783 twl_post_command_packet(tw_dev, request_id); 784 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 785 786 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ; 787 788 /* Now wait for command to complete */ 789 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout); 790 791 /* We timed out, and didn't get an interrupt */ 792 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) { 793 /* Now we need to reset the board */ 794 printk(KERN_WARNING "3w-sas: scsi%d: WARNING: (0x%02X:0x%04X): Character ioctl (0x%x) timed out, resetting card.\n", 795 tw_dev->host->host_no, TW_DRIVER, 0x6, 796 cmd); 797 retval = -EIO; 798 twl_reset_device_extension(tw_dev, 1); 799 goto out3; 800 } 801 802 /* Now copy in the command packet response */ 803 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virt[request_id], sizeof(TW_Command_Full)); 804 805 /* Now complete the io */ 806 spin_lock_irqsave(tw_dev->host->host_lock, flags); 807 tw_dev->posted_request_count--; 808 tw_dev->state[request_id] = TW_S_COMPLETED; 809 twl_free_request_id(tw_dev, request_id); 810 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 811 break; 812 default: 813 retval = -ENOTTY; 814 goto out3; 815 } 816 817 /* Now copy the entire response to userspace */ 818 if (copy_to_user(argp, tw_ioctl, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length - 1) == 0) 819 retval = 0; 820 out3: 821 /* Now free ioctl buf memory */ 822 dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, cpu_addr, dma_handle); 823 out2: 824 mutex_unlock(&tw_dev->ioctl_lock); 825 out: 826 mutex_unlock(&twl_chrdev_mutex); 827 return retval; 828 } /* End twl_chrdev_ioctl() */ 829 830 /* This function handles open for the character device */ 831 static int twl_chrdev_open(struct inode *inode, struct file *file) 832 { 833 unsigned int minor_number; 834 int retval = -ENODEV; 835 836 if (!capable(CAP_SYS_ADMIN)) { 837 retval = -EACCES; 838 goto out; 839 } 840 841 minor_number = iminor(inode); 842 if (minor_number >= twl_device_extension_count) 843 goto out; 844 retval = 0; 845 out: 846 return retval; 847 } /* End twl_chrdev_open() */ 848 849 /* File operations struct for character device */ 850 static const struct file_operations twl_fops = { 851 .owner = THIS_MODULE, 852 .unlocked_ioctl = twl_chrdev_ioctl, 853 .open = twl_chrdev_open, 854 .release = NULL, 855 .llseek = noop_llseek, 856 }; 857 858 /* This function passes sense data from firmware to scsi layer */ 859 static int twl_fill_sense(TW_Device_Extension *tw_dev, int i, int request_id, int copy_sense, int print_host) 860 { 861 TW_Command_Apache_Header *header; 862 TW_Command_Full *full_command_packet; 863 unsigned short error; 864 char *error_str; 865 int retval = 1; 866 867 header = tw_dev->sense_buffer_virt[i]; 868 full_command_packet = tw_dev->command_packet_virt[request_id]; 869 870 /* Get embedded firmware error string */ 871 error_str = &(header->err_specific_desc[strlen(header->err_specific_desc) + 1]); 872 873 /* Don't print error for Logical unit not supported during rollcall */ 874 error = le16_to_cpu(header->status_block.error); 875 if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error != TW_ERROR_UNIT_OFFLINE) && (error != TW_ERROR_INVALID_FIELD_IN_CDB)) { 876 if (print_host) 877 printk(KERN_WARNING "3w-sas: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n", 878 tw_dev->host->host_no, 879 TW_MESSAGE_SOURCE_CONTROLLER_ERROR, 880 header->status_block.error, 881 error_str, 882 header->err_specific_desc); 883 else 884 printk(KERN_WARNING "3w-sas: ERROR: (0x%02X:0x%04X): %s:%s.\n", 885 TW_MESSAGE_SOURCE_CONTROLLER_ERROR, 886 header->status_block.error, 887 error_str, 888 header->err_specific_desc); 889 } 890 891 if (copy_sense) { 892 memcpy(tw_dev->srb[request_id]->sense_buffer, header->sense_data, TW_SENSE_DATA_LENGTH); 893 tw_dev->srb[request_id]->result = (full_command_packet->command.newcommand.status << 1); 894 goto out; 895 } 896 out: 897 return retval; 898 } /* End twl_fill_sense() */ 899 900 /* This function will free up device extension resources */ 901 static void twl_free_device_extension(TW_Device_Extension *tw_dev) 902 { 903 if (tw_dev->command_packet_virt[0]) 904 dma_free_coherent(&tw_dev->tw_pci_dev->dev, 905 sizeof(TW_Command_Full)*TW_Q_LENGTH, 906 tw_dev->command_packet_virt[0], 907 tw_dev->command_packet_phys[0]); 908 909 if (tw_dev->generic_buffer_virt[0]) 910 dma_free_coherent(&tw_dev->tw_pci_dev->dev, 911 TW_SECTOR_SIZE*TW_Q_LENGTH, 912 tw_dev->generic_buffer_virt[0], 913 tw_dev->generic_buffer_phys[0]); 914 915 if (tw_dev->sense_buffer_virt[0]) 916 dma_free_coherent(&tw_dev->tw_pci_dev->dev, 917 sizeof(TW_Command_Apache_Header)* 918 TW_Q_LENGTH, 919 tw_dev->sense_buffer_virt[0], 920 tw_dev->sense_buffer_phys[0]); 921 922 kfree(tw_dev->event_queue[0]); 923 } /* End twl_free_device_extension() */ 924 925 /* This function will get parameter table entries from the firmware */ 926 static void *twl_get_param(TW_Device_Extension *tw_dev, int request_id, int table_id, int parameter_id, int parameter_size_bytes) 927 { 928 TW_Command_Full *full_command_packet; 929 TW_Command *command_packet; 930 TW_Param_Apache *param; 931 void *retval = NULL; 932 933 /* Setup the command packet */ 934 full_command_packet = tw_dev->command_packet_virt[request_id]; 935 memset(full_command_packet, 0, sizeof(TW_Command_Full)); 936 command_packet = &full_command_packet->command.oldcommand; 937 938 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM); 939 command_packet->size = TW_COMMAND_SIZE; 940 command_packet->request_id = request_id; 941 command_packet->byte6_offset.block_count = cpu_to_le16(1); 942 943 /* Now setup the param */ 944 param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id]; 945 memset(param, 0, TW_SECTOR_SIZE); 946 param->table_id = cpu_to_le16(table_id | 0x8000); 947 param->parameter_id = cpu_to_le16(parameter_id); 948 param->parameter_size_bytes = cpu_to_le16(parameter_size_bytes); 949 950 command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]); 951 command_packet->byte8_offset.param.sgl[0].length = TW_CPU_TO_SGL(TW_SECTOR_SIZE); 952 953 /* Post the command packet to the board */ 954 twl_post_command_packet(tw_dev, request_id); 955 956 /* Poll for completion */ 957 if (twl_poll_response(tw_dev, request_id, 30)) 958 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "No valid response during get param") 959 else 960 retval = (void *)&(param->data[0]); 961 962 tw_dev->posted_request_count--; 963 tw_dev->state[request_id] = TW_S_INITIAL; 964 965 return retval; 966 } /* End twl_get_param() */ 967 968 /* This function will send an initconnection command to controller */ 969 static int twl_initconnection(TW_Device_Extension *tw_dev, int message_credits, 970 u32 set_features, unsigned short current_fw_srl, 971 unsigned short current_fw_arch_id, 972 unsigned short current_fw_branch, 973 unsigned short current_fw_build, 974 unsigned short *fw_on_ctlr_srl, 975 unsigned short *fw_on_ctlr_arch_id, 976 unsigned short *fw_on_ctlr_branch, 977 unsigned short *fw_on_ctlr_build, 978 u32 *init_connect_result) 979 { 980 TW_Command_Full *full_command_packet; 981 TW_Initconnect *tw_initconnect; 982 int request_id = 0, retval = 1; 983 984 /* Initialize InitConnection command packet */ 985 full_command_packet = tw_dev->command_packet_virt[request_id]; 986 memset(full_command_packet, 0, sizeof(TW_Command_Full)); 987 full_command_packet->header.header_desc.size_header = 128; 988 989 tw_initconnect = (TW_Initconnect *)&full_command_packet->command.oldcommand; 990 tw_initconnect->opcode__reserved = TW_OPRES_IN(0, TW_OP_INIT_CONNECTION); 991 tw_initconnect->request_id = request_id; 992 tw_initconnect->message_credits = cpu_to_le16(message_credits); 993 tw_initconnect->features = set_features; 994 995 /* Turn on 64-bit sgl support if we need to */ 996 tw_initconnect->features |= sizeof(dma_addr_t) > 4 ? 1 : 0; 997 998 tw_initconnect->features = cpu_to_le32(tw_initconnect->features); 999 1000 if (set_features & TW_EXTENDED_INIT_CONNECT) { 1001 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE_EXTENDED; 1002 tw_initconnect->fw_srl = cpu_to_le16(current_fw_srl); 1003 tw_initconnect->fw_arch_id = cpu_to_le16(current_fw_arch_id); 1004 tw_initconnect->fw_branch = cpu_to_le16(current_fw_branch); 1005 tw_initconnect->fw_build = cpu_to_le16(current_fw_build); 1006 } else 1007 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE; 1008 1009 /* Send command packet to the board */ 1010 twl_post_command_packet(tw_dev, request_id); 1011 1012 /* Poll for completion */ 1013 if (twl_poll_response(tw_dev, request_id, 30)) { 1014 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x8, "No valid response during init connection"); 1015 } else { 1016 if (set_features & TW_EXTENDED_INIT_CONNECT) { 1017 *fw_on_ctlr_srl = le16_to_cpu(tw_initconnect->fw_srl); 1018 *fw_on_ctlr_arch_id = le16_to_cpu(tw_initconnect->fw_arch_id); 1019 *fw_on_ctlr_branch = le16_to_cpu(tw_initconnect->fw_branch); 1020 *fw_on_ctlr_build = le16_to_cpu(tw_initconnect->fw_build); 1021 *init_connect_result = le32_to_cpu(tw_initconnect->result); 1022 } 1023 retval = 0; 1024 } 1025 1026 tw_dev->posted_request_count--; 1027 tw_dev->state[request_id] = TW_S_INITIAL; 1028 1029 return retval; 1030 } /* End twl_initconnection() */ 1031 1032 /* This function will initialize the fields of a device extension */ 1033 static int twl_initialize_device_extension(TW_Device_Extension *tw_dev) 1034 { 1035 int i, retval = 1; 1036 1037 /* Initialize command packet buffers */ 1038 if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) { 1039 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x9, "Command packet memory allocation failed"); 1040 goto out; 1041 } 1042 1043 /* Initialize generic buffer */ 1044 if (twl_allocate_memory(tw_dev, TW_SECTOR_SIZE, 1)) { 1045 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xa, "Generic memory allocation failed"); 1046 goto out; 1047 } 1048 1049 /* Allocate sense buffers */ 1050 if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Apache_Header), 2)) { 1051 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xb, "Sense buffer allocation failed"); 1052 goto out; 1053 } 1054 1055 /* Allocate event info space */ 1056 tw_dev->event_queue[0] = kcalloc(TW_Q_LENGTH, sizeof(TW_Event), GFP_KERNEL); 1057 if (!tw_dev->event_queue[0]) { 1058 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xc, "Event info memory allocation failed"); 1059 goto out; 1060 } 1061 1062 for (i = 0; i < TW_Q_LENGTH; i++) { 1063 tw_dev->event_queue[i] = (TW_Event *)((unsigned char *)tw_dev->event_queue[0] + (i * sizeof(TW_Event))); 1064 tw_dev->free_queue[i] = i; 1065 tw_dev->state[i] = TW_S_INITIAL; 1066 } 1067 1068 tw_dev->free_head = TW_Q_START; 1069 tw_dev->free_tail = TW_Q_START; 1070 tw_dev->error_sequence_id = 1; 1071 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; 1072 1073 mutex_init(&tw_dev->ioctl_lock); 1074 init_waitqueue_head(&tw_dev->ioctl_wqueue); 1075 1076 retval = 0; 1077 out: 1078 return retval; 1079 } /* End twl_initialize_device_extension() */ 1080 1081 /* This function will handle attention interrupts */ 1082 static int twl_handle_attention_interrupt(TW_Device_Extension *tw_dev) 1083 { 1084 int retval = 1; 1085 u32 request_id, doorbell; 1086 1087 /* Read doorbell status */ 1088 doorbell = readl(TWL_HOBDB_REG_ADDR(tw_dev)); 1089 1090 /* Check for controller errors */ 1091 if (doorbell & TWL_DOORBELL_CONTROLLER_ERROR) { 1092 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xd, "Microcontroller Error: clearing"); 1093 goto out; 1094 } 1095 1096 /* Check if we need to perform an AEN drain */ 1097 if (doorbell & TWL_DOORBELL_ATTENTION_INTERRUPT) { 1098 if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) { 1099 twl_get_request_id(tw_dev, &request_id); 1100 if (twl_aen_read_queue(tw_dev, request_id)) { 1101 tw_dev->state[request_id] = TW_S_COMPLETED; 1102 twl_free_request_id(tw_dev, request_id); 1103 clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags); 1104 } 1105 } 1106 } 1107 1108 retval = 0; 1109 out: 1110 /* Clear doorbell interrupt */ 1111 TWL_CLEAR_DB_INTERRUPT(tw_dev); 1112 1113 /* Make sure the clear was flushed by reading it back */ 1114 readl(TWL_HOBDBC_REG_ADDR(tw_dev)); 1115 1116 return retval; 1117 } /* End twl_handle_attention_interrupt() */ 1118 1119 /* Interrupt service routine */ 1120 static irqreturn_t twl_interrupt(int irq, void *dev_instance) 1121 { 1122 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance; 1123 int i, handled = 0, error = 0; 1124 dma_addr_t mfa = 0; 1125 u32 reg, regl, regh, response, request_id = 0; 1126 struct scsi_cmnd *cmd; 1127 TW_Command_Full *full_command_packet; 1128 1129 spin_lock(tw_dev->host->host_lock); 1130 1131 /* Read host interrupt status */ 1132 reg = readl(TWL_HISTAT_REG_ADDR(tw_dev)); 1133 1134 /* Check if this is our interrupt, otherwise bail */ 1135 if (!(reg & TWL_HISTATUS_VALID_INTERRUPT)) 1136 goto twl_interrupt_bail; 1137 1138 handled = 1; 1139 1140 /* If we are resetting, bail */ 1141 if (test_bit(TW_IN_RESET, &tw_dev->flags)) 1142 goto twl_interrupt_bail; 1143 1144 /* Attention interrupt */ 1145 if (reg & TWL_HISTATUS_ATTENTION_INTERRUPT) { 1146 if (twl_handle_attention_interrupt(tw_dev)) { 1147 TWL_MASK_INTERRUPTS(tw_dev); 1148 goto twl_interrupt_bail; 1149 } 1150 } 1151 1152 /* Response interrupt */ 1153 while (reg & TWL_HISTATUS_RESPONSE_INTERRUPT) { 1154 if (sizeof(dma_addr_t) > 4) { 1155 regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev)); 1156 regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev)); 1157 mfa = ((u64)regh << 32) | regl; 1158 } else 1159 mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev)); 1160 1161 error = 0; 1162 response = (u32)mfa; 1163 1164 /* Check for command packet error */ 1165 if (!TW_NOTMFA_OUT(response)) { 1166 for (i=0;i<TW_Q_LENGTH;i++) { 1167 if (tw_dev->sense_buffer_phys[i] == mfa) { 1168 request_id = le16_to_cpu(tw_dev->sense_buffer_virt[i]->header_desc.request_id); 1169 if (tw_dev->srb[request_id] != NULL) 1170 error = twl_fill_sense(tw_dev, i, request_id, 1, 1); 1171 else { 1172 /* Skip ioctl error prints */ 1173 if (request_id != tw_dev->chrdev_request_id) 1174 error = twl_fill_sense(tw_dev, i, request_id, 0, 1); 1175 else 1176 memcpy(tw_dev->command_packet_virt[request_id], tw_dev->sense_buffer_virt[i], sizeof(TW_Command_Apache_Header)); 1177 } 1178 1179 /* Now re-post the sense buffer */ 1180 writel((u32)((u64)tw_dev->sense_buffer_phys[i] >> 32), TWL_HOBQPH_REG_ADDR(tw_dev)); 1181 writel((u32)tw_dev->sense_buffer_phys[i], TWL_HOBQPL_REG_ADDR(tw_dev)); 1182 break; 1183 } 1184 } 1185 } else 1186 request_id = TW_RESID_OUT(response); 1187 1188 full_command_packet = tw_dev->command_packet_virt[request_id]; 1189 1190 /* Check for correct state */ 1191 if (tw_dev->state[request_id] != TW_S_POSTED) { 1192 if (tw_dev->srb[request_id] != NULL) { 1193 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xe, "Received a request id that wasn't posted"); 1194 TWL_MASK_INTERRUPTS(tw_dev); 1195 goto twl_interrupt_bail; 1196 } 1197 } 1198 1199 /* Check for internal command completion */ 1200 if (tw_dev->srb[request_id] == NULL) { 1201 if (request_id != tw_dev->chrdev_request_id) { 1202 if (twl_aen_complete(tw_dev, request_id)) 1203 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xf, "Error completing AEN during attention interrupt"); 1204 } else { 1205 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; 1206 wake_up(&tw_dev->ioctl_wqueue); 1207 } 1208 } else { 1209 cmd = tw_dev->srb[request_id]; 1210 1211 if (!error) 1212 cmd->result = (DID_OK << 16); 1213 1214 /* Report residual bytes for single sgl */ 1215 if ((scsi_sg_count(cmd) <= 1) && (full_command_packet->command.newcommand.status == 0)) { 1216 if (full_command_packet->command.newcommand.sg_list[0].length < scsi_bufflen(tw_dev->srb[request_id])) 1217 scsi_set_resid(cmd, scsi_bufflen(cmd) - full_command_packet->command.newcommand.sg_list[0].length); 1218 } 1219 1220 /* Now complete the io */ 1221 scsi_dma_unmap(cmd); 1222 cmd->scsi_done(cmd); 1223 tw_dev->state[request_id] = TW_S_COMPLETED; 1224 twl_free_request_id(tw_dev, request_id); 1225 tw_dev->posted_request_count--; 1226 } 1227 1228 /* Check for another response interrupt */ 1229 reg = readl(TWL_HISTAT_REG_ADDR(tw_dev)); 1230 } 1231 1232 twl_interrupt_bail: 1233 spin_unlock(tw_dev->host->host_lock); 1234 return IRQ_RETVAL(handled); 1235 } /* End twl_interrupt() */ 1236 1237 /* This function will poll for a register change */ 1238 static int twl_poll_register(TW_Device_Extension *tw_dev, void *reg, u32 value, u32 result, int seconds) 1239 { 1240 unsigned long before; 1241 int retval = 1; 1242 u32 reg_value; 1243 1244 reg_value = readl(reg); 1245 before = jiffies; 1246 1247 while ((reg_value & value) != result) { 1248 reg_value = readl(reg); 1249 if (time_after(jiffies, before + HZ * seconds)) 1250 goto out; 1251 msleep(50); 1252 } 1253 retval = 0; 1254 out: 1255 return retval; 1256 } /* End twl_poll_register() */ 1257 1258 /* This function will reset a controller */ 1259 static int twl_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset) 1260 { 1261 int retval = 1; 1262 int i = 0; 1263 u32 status = 0; 1264 unsigned short fw_on_ctlr_srl = 0, fw_on_ctlr_arch_id = 0; 1265 unsigned short fw_on_ctlr_branch = 0, fw_on_ctlr_build = 0; 1266 u32 init_connect_result = 0; 1267 int tries = 0; 1268 int do_soft_reset = soft_reset; 1269 1270 while (tries < TW_MAX_RESET_TRIES) { 1271 /* Do a soft reset if one is needed */ 1272 if (do_soft_reset) { 1273 TWL_SOFT_RESET(tw_dev); 1274 1275 /* Make sure controller is in a good state */ 1276 if (twl_poll_register(tw_dev, TWL_SCRPD3_REG_ADDR(tw_dev), TWL_CONTROLLER_READY, 0x0, 30)) { 1277 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Controller never went non-ready during reset sequence"); 1278 tries++; 1279 continue; 1280 } 1281 if (twl_poll_register(tw_dev, TWL_SCRPD3_REG_ADDR(tw_dev), TWL_CONTROLLER_READY, TWL_CONTROLLER_READY, 60)) { 1282 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x11, "Controller not ready during reset sequence"); 1283 tries++; 1284 continue; 1285 } 1286 } 1287 1288 /* Initconnect */ 1289 if (twl_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS, 1290 TW_EXTENDED_INIT_CONNECT, TW_CURRENT_DRIVER_SRL, 1291 TW_9750_ARCH_ID, TW_CURRENT_DRIVER_BRANCH, 1292 TW_CURRENT_DRIVER_BUILD, &fw_on_ctlr_srl, 1293 &fw_on_ctlr_arch_id, &fw_on_ctlr_branch, 1294 &fw_on_ctlr_build, &init_connect_result)) { 1295 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x12, "Initconnection failed while checking SRL"); 1296 do_soft_reset = 1; 1297 tries++; 1298 continue; 1299 } 1300 1301 /* Load sense buffers */ 1302 while (i < TW_Q_LENGTH) { 1303 writel((u32)((u64)tw_dev->sense_buffer_phys[i] >> 32), TWL_HOBQPH_REG_ADDR(tw_dev)); 1304 writel((u32)tw_dev->sense_buffer_phys[i], TWL_HOBQPL_REG_ADDR(tw_dev)); 1305 1306 /* Check status for over-run after each write */ 1307 status = readl(TWL_STATUS_REG_ADDR(tw_dev)); 1308 if (!(status & TWL_STATUS_OVERRUN_SUBMIT)) 1309 i++; 1310 } 1311 1312 /* Now check status */ 1313 status = readl(TWL_STATUS_REG_ADDR(tw_dev)); 1314 if (status) { 1315 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x13, "Bad controller status after loading sense buffers"); 1316 do_soft_reset = 1; 1317 tries++; 1318 continue; 1319 } 1320 1321 /* Drain the AEN queue */ 1322 if (twl_aen_drain_queue(tw_dev, soft_reset)) { 1323 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x14, "AEN drain failed during reset sequence"); 1324 do_soft_reset = 1; 1325 tries++; 1326 continue; 1327 } 1328 1329 /* Load rest of compatibility struct */ 1330 strncpy(tw_dev->tw_compat_info.driver_version, TW_DRIVER_VERSION, strlen(TW_DRIVER_VERSION)); 1331 tw_dev->tw_compat_info.driver_srl_high = TW_CURRENT_DRIVER_SRL; 1332 tw_dev->tw_compat_info.driver_branch_high = TW_CURRENT_DRIVER_BRANCH; 1333 tw_dev->tw_compat_info.driver_build_high = TW_CURRENT_DRIVER_BUILD; 1334 tw_dev->tw_compat_info.driver_srl_low = TW_BASE_FW_SRL; 1335 tw_dev->tw_compat_info.driver_branch_low = TW_BASE_FW_BRANCH; 1336 tw_dev->tw_compat_info.driver_build_low = TW_BASE_FW_BUILD; 1337 tw_dev->tw_compat_info.fw_on_ctlr_srl = fw_on_ctlr_srl; 1338 tw_dev->tw_compat_info.fw_on_ctlr_branch = fw_on_ctlr_branch; 1339 tw_dev->tw_compat_info.fw_on_ctlr_build = fw_on_ctlr_build; 1340 1341 /* If we got here, controller is in a good state */ 1342 retval = 0; 1343 goto out; 1344 } 1345 out: 1346 return retval; 1347 } /* End twl_reset_sequence() */ 1348 1349 /* This function will reset a device extension */ 1350 static int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset) 1351 { 1352 int i = 0, retval = 1; 1353 unsigned long flags = 0; 1354 1355 /* Block SCSI requests while we are resetting */ 1356 if (ioctl_reset) 1357 scsi_block_requests(tw_dev->host); 1358 1359 set_bit(TW_IN_RESET, &tw_dev->flags); 1360 TWL_MASK_INTERRUPTS(tw_dev); 1361 TWL_CLEAR_DB_INTERRUPT(tw_dev); 1362 1363 spin_lock_irqsave(tw_dev->host->host_lock, flags); 1364 1365 /* Abort all requests that are in progress */ 1366 for (i = 0; i < TW_Q_LENGTH; i++) { 1367 if ((tw_dev->state[i] != TW_S_FINISHED) && 1368 (tw_dev->state[i] != TW_S_INITIAL) && 1369 (tw_dev->state[i] != TW_S_COMPLETED)) { 1370 struct scsi_cmnd *cmd = tw_dev->srb[i]; 1371 1372 if (cmd) { 1373 cmd->result = (DID_RESET << 16); 1374 scsi_dma_unmap(cmd); 1375 cmd->scsi_done(cmd); 1376 } 1377 } 1378 } 1379 1380 /* Reset queues and counts */ 1381 for (i = 0; i < TW_Q_LENGTH; i++) { 1382 tw_dev->free_queue[i] = i; 1383 tw_dev->state[i] = TW_S_INITIAL; 1384 } 1385 tw_dev->free_head = TW_Q_START; 1386 tw_dev->free_tail = TW_Q_START; 1387 tw_dev->posted_request_count = 0; 1388 1389 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 1390 1391 if (twl_reset_sequence(tw_dev, 1)) 1392 goto out; 1393 1394 TWL_UNMASK_INTERRUPTS(tw_dev); 1395 1396 clear_bit(TW_IN_RESET, &tw_dev->flags); 1397 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; 1398 1399 retval = 0; 1400 out: 1401 if (ioctl_reset) 1402 scsi_unblock_requests(tw_dev->host); 1403 return retval; 1404 } /* End twl_reset_device_extension() */ 1405 1406 /* This funciton returns unit geometry in cylinders/heads/sectors */ 1407 static int twl_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[]) 1408 { 1409 int heads, sectors; 1410 TW_Device_Extension *tw_dev; 1411 1412 tw_dev = (TW_Device_Extension *)sdev->host->hostdata; 1413 1414 if (capacity >= 0x200000) { 1415 heads = 255; 1416 sectors = 63; 1417 } else { 1418 heads = 64; 1419 sectors = 32; 1420 } 1421 1422 geom[0] = heads; 1423 geom[1] = sectors; 1424 geom[2] = sector_div(capacity, heads * sectors); /* cylinders */ 1425 1426 return 0; 1427 } /* End twl_scsi_biosparam() */ 1428 1429 /* This is the new scsi eh reset function */ 1430 static int twl_scsi_eh_reset(struct scsi_cmnd *SCpnt) 1431 { 1432 TW_Device_Extension *tw_dev = NULL; 1433 int retval = FAILED; 1434 1435 tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata; 1436 1437 tw_dev->num_resets++; 1438 1439 sdev_printk(KERN_WARNING, SCpnt->device, 1440 "WARNING: (0x%02X:0x%04X): Command (0x%x) timed out, resetting card.\n", 1441 TW_DRIVER, 0x2c, SCpnt->cmnd[0]); 1442 1443 /* Make sure we are not issuing an ioctl or resetting from ioctl */ 1444 mutex_lock(&tw_dev->ioctl_lock); 1445 1446 /* Now reset the card and some of the device extension data */ 1447 if (twl_reset_device_extension(tw_dev, 0)) { 1448 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x15, "Controller reset failed during scsi host reset"); 1449 goto out; 1450 } 1451 1452 retval = SUCCESS; 1453 out: 1454 mutex_unlock(&tw_dev->ioctl_lock); 1455 return retval; 1456 } /* End twl_scsi_eh_reset() */ 1457 1458 /* This is the main scsi queue function to handle scsi opcodes */ 1459 static int twl_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *)) 1460 { 1461 int request_id, retval; 1462 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata; 1463 1464 /* If we are resetting due to timed out ioctl, report as busy */ 1465 if (test_bit(TW_IN_RESET, &tw_dev->flags)) { 1466 retval = SCSI_MLQUEUE_HOST_BUSY; 1467 goto out; 1468 } 1469 1470 /* Save done function into scsi_cmnd struct */ 1471 SCpnt->scsi_done = done; 1472 1473 /* Get a free request id */ 1474 twl_get_request_id(tw_dev, &request_id); 1475 1476 /* Save the scsi command for use by the ISR */ 1477 tw_dev->srb[request_id] = SCpnt; 1478 1479 retval = twl_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL); 1480 if (retval) { 1481 tw_dev->state[request_id] = TW_S_COMPLETED; 1482 twl_free_request_id(tw_dev, request_id); 1483 SCpnt->result = (DID_ERROR << 16); 1484 done(SCpnt); 1485 retval = 0; 1486 } 1487 out: 1488 return retval; 1489 } /* End twl_scsi_queue() */ 1490 1491 static DEF_SCSI_QCMD(twl_scsi_queue) 1492 1493 /* This function tells the controller to shut down */ 1494 static void __twl_shutdown(TW_Device_Extension *tw_dev) 1495 { 1496 /* Disable interrupts */ 1497 TWL_MASK_INTERRUPTS(tw_dev); 1498 1499 /* Free up the IRQ */ 1500 free_irq(tw_dev->tw_pci_dev->irq, tw_dev); 1501 1502 printk(KERN_WARNING "3w-sas: Shutting down host %d.\n", tw_dev->host->host_no); 1503 1504 /* Tell the card we are shutting down */ 1505 if (twl_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) { 1506 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x16, "Connection shutdown failed"); 1507 } else { 1508 printk(KERN_WARNING "3w-sas: Shutdown complete.\n"); 1509 } 1510 1511 /* Clear doorbell interrupt just before exit */ 1512 TWL_CLEAR_DB_INTERRUPT(tw_dev); 1513 } /* End __twl_shutdown() */ 1514 1515 /* Wrapper for __twl_shutdown */ 1516 static void twl_shutdown(struct pci_dev *pdev) 1517 { 1518 struct Scsi_Host *host = pci_get_drvdata(pdev); 1519 TW_Device_Extension *tw_dev; 1520 1521 if (!host) 1522 return; 1523 1524 tw_dev = (TW_Device_Extension *)host->hostdata; 1525 1526 if (tw_dev->online) 1527 __twl_shutdown(tw_dev); 1528 } /* End twl_shutdown() */ 1529 1530 /* This function configures unit settings when a unit is coming on-line */ 1531 static int twl_slave_configure(struct scsi_device *sdev) 1532 { 1533 /* Force 60 second timeout */ 1534 blk_queue_rq_timeout(sdev->request_queue, 60 * HZ); 1535 1536 return 0; 1537 } /* End twl_slave_configure() */ 1538 1539 /* scsi_host_template initializer */ 1540 static struct scsi_host_template driver_template = { 1541 .module = THIS_MODULE, 1542 .name = "3w-sas", 1543 .queuecommand = twl_scsi_queue, 1544 .eh_host_reset_handler = twl_scsi_eh_reset, 1545 .bios_param = twl_scsi_biosparam, 1546 .change_queue_depth = scsi_change_queue_depth, 1547 .can_queue = TW_Q_LENGTH-2, 1548 .slave_configure = twl_slave_configure, 1549 .this_id = -1, 1550 .sg_tablesize = TW_LIBERATOR_MAX_SGL_LENGTH, 1551 .max_sectors = TW_MAX_SECTORS, 1552 .cmd_per_lun = TW_MAX_CMDS_PER_LUN, 1553 .shost_attrs = twl_host_attrs, 1554 .emulated = 1, 1555 .no_write_same = 1, 1556 }; 1557 1558 /* This function will probe and initialize a card */ 1559 static int twl_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id) 1560 { 1561 struct Scsi_Host *host = NULL; 1562 TW_Device_Extension *tw_dev; 1563 int retval = -ENODEV; 1564 int *ptr_phycount, phycount=0; 1565 1566 retval = pci_enable_device(pdev); 1567 if (retval) { 1568 TW_PRINTK(host, TW_DRIVER, 0x17, "Failed to enable pci device"); 1569 goto out_disable_device; 1570 } 1571 1572 pci_set_master(pdev); 1573 pci_try_set_mwi(pdev); 1574 1575 if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) || 1576 dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) { 1577 TW_PRINTK(host, TW_DRIVER, 0x18, "Failed to set dma mask"); 1578 retval = -ENODEV; 1579 goto out_disable_device; 1580 } 1581 1582 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension)); 1583 if (!host) { 1584 TW_PRINTK(host, TW_DRIVER, 0x19, "Failed to allocate memory for device extension"); 1585 retval = -ENOMEM; 1586 goto out_disable_device; 1587 } 1588 tw_dev = shost_priv(host); 1589 1590 /* Save values to device extension */ 1591 tw_dev->host = host; 1592 tw_dev->tw_pci_dev = pdev; 1593 1594 if (twl_initialize_device_extension(tw_dev)) { 1595 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Failed to initialize device extension"); 1596 retval = -ENOMEM; 1597 goto out_free_device_extension; 1598 } 1599 1600 /* Request IO regions */ 1601 retval = pci_request_regions(pdev, "3w-sas"); 1602 if (retval) { 1603 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Failed to get mem region"); 1604 goto out_free_device_extension; 1605 } 1606 1607 /* Save base address, use region 1 */ 1608 tw_dev->base_addr = pci_iomap(pdev, 1, 0); 1609 if (!tw_dev->base_addr) { 1610 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to ioremap"); 1611 retval = -ENOMEM; 1612 goto out_release_mem_region; 1613 } 1614 1615 /* Disable interrupts on the card */ 1616 TWL_MASK_INTERRUPTS(tw_dev); 1617 1618 /* Initialize the card */ 1619 if (twl_reset_sequence(tw_dev, 0)) { 1620 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1d, "Controller reset failed during probe"); 1621 retval = -ENOMEM; 1622 goto out_iounmap; 1623 } 1624 1625 /* Set host specific parameters */ 1626 host->max_id = TW_MAX_UNITS; 1627 host->max_cmd_len = TW_MAX_CDB_LEN; 1628 host->max_lun = TW_MAX_LUNS; 1629 host->max_channel = 0; 1630 1631 /* Register the card with the kernel SCSI layer */ 1632 retval = scsi_add_host(host, &pdev->dev); 1633 if (retval) { 1634 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1e, "scsi add host failed"); 1635 goto out_iounmap; 1636 } 1637 1638 pci_set_drvdata(pdev, host); 1639 1640 printk(KERN_WARNING "3w-sas: scsi%d: Found an LSI 3ware %s Controller at 0x%llx, IRQ: %d.\n", 1641 host->host_no, 1642 (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE, 1643 TW_PARAM_MODEL, TW_PARAM_MODEL_LENGTH), 1644 (u64)pci_resource_start(pdev, 1), pdev->irq); 1645 1646 ptr_phycount = twl_get_param(tw_dev, 2, TW_PARAM_PHY_SUMMARY_TABLE, 1647 TW_PARAM_PHYCOUNT, TW_PARAM_PHYCOUNT_LENGTH); 1648 if (ptr_phycount) 1649 phycount = le32_to_cpu(*(int *)ptr_phycount); 1650 1651 printk(KERN_WARNING "3w-sas: scsi%d: Firmware %s, BIOS %s, Phys: %d.\n", 1652 host->host_no, 1653 (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE, 1654 TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH), 1655 (char *)twl_get_param(tw_dev, 2, TW_VERSION_TABLE, 1656 TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH), 1657 phycount); 1658 1659 /* Try to enable MSI */ 1660 if (use_msi && !pci_enable_msi(pdev)) 1661 set_bit(TW_USING_MSI, &tw_dev->flags); 1662 1663 /* Now setup the interrupt handler */ 1664 retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas", tw_dev); 1665 if (retval) { 1666 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Error requesting IRQ"); 1667 goto out_remove_host; 1668 } 1669 1670 twl_device_extension_list[twl_device_extension_count] = tw_dev; 1671 twl_device_extension_count++; 1672 1673 /* Re-enable interrupts on the card */ 1674 TWL_UNMASK_INTERRUPTS(tw_dev); 1675 1676 /* Finally, scan the host */ 1677 scsi_scan_host(host); 1678 1679 /* Add sysfs binary files */ 1680 if (sysfs_create_bin_file(&host->shost_dev.kobj, &twl_sysfs_aen_read_attr)) 1681 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x20, "Failed to create sysfs binary file: 3ware_aen_read"); 1682 if (sysfs_create_bin_file(&host->shost_dev.kobj, &twl_sysfs_compat_info_attr)) 1683 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x21, "Failed to create sysfs binary file: 3ware_compat_info"); 1684 1685 if (twl_major == -1) { 1686 if ((twl_major = register_chrdev (0, "twl", &twl_fops)) < 0) 1687 TW_PRINTK(host, TW_DRIVER, 0x22, "Failed to register character device"); 1688 } 1689 tw_dev->online = 1; 1690 return 0; 1691 1692 out_remove_host: 1693 if (test_bit(TW_USING_MSI, &tw_dev->flags)) 1694 pci_disable_msi(pdev); 1695 scsi_remove_host(host); 1696 out_iounmap: 1697 iounmap(tw_dev->base_addr); 1698 out_release_mem_region: 1699 pci_release_regions(pdev); 1700 out_free_device_extension: 1701 twl_free_device_extension(tw_dev); 1702 scsi_host_put(host); 1703 out_disable_device: 1704 pci_disable_device(pdev); 1705 1706 return retval; 1707 } /* End twl_probe() */ 1708 1709 /* This function is called to remove a device */ 1710 static void twl_remove(struct pci_dev *pdev) 1711 { 1712 struct Scsi_Host *host = pci_get_drvdata(pdev); 1713 TW_Device_Extension *tw_dev; 1714 1715 if (!host) 1716 return; 1717 1718 tw_dev = (TW_Device_Extension *)host->hostdata; 1719 1720 if (!tw_dev->online) 1721 return; 1722 1723 /* Remove sysfs binary files */ 1724 sysfs_remove_bin_file(&host->shost_dev.kobj, &twl_sysfs_aen_read_attr); 1725 sysfs_remove_bin_file(&host->shost_dev.kobj, &twl_sysfs_compat_info_attr); 1726 1727 scsi_remove_host(tw_dev->host); 1728 1729 /* Unregister character device */ 1730 if (twl_major >= 0) { 1731 unregister_chrdev(twl_major, "twl"); 1732 twl_major = -1; 1733 } 1734 1735 /* Shutdown the card */ 1736 __twl_shutdown(tw_dev); 1737 1738 /* Disable MSI if enabled */ 1739 if (test_bit(TW_USING_MSI, &tw_dev->flags)) 1740 pci_disable_msi(pdev); 1741 1742 /* Free IO remapping */ 1743 iounmap(tw_dev->base_addr); 1744 1745 /* Free up the mem region */ 1746 pci_release_regions(pdev); 1747 1748 /* Free up device extension resources */ 1749 twl_free_device_extension(tw_dev); 1750 1751 scsi_host_put(tw_dev->host); 1752 pci_disable_device(pdev); 1753 twl_device_extension_count--; 1754 } /* End twl_remove() */ 1755 1756 #ifdef CONFIG_PM 1757 /* This function is called on PCI suspend */ 1758 static int twl_suspend(struct pci_dev *pdev, pm_message_t state) 1759 { 1760 struct Scsi_Host *host = pci_get_drvdata(pdev); 1761 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; 1762 1763 printk(KERN_WARNING "3w-sas: Suspending host %d.\n", tw_dev->host->host_no); 1764 /* Disable interrupts */ 1765 TWL_MASK_INTERRUPTS(tw_dev); 1766 1767 free_irq(tw_dev->tw_pci_dev->irq, tw_dev); 1768 1769 /* Tell the card we are shutting down */ 1770 if (twl_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) { 1771 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x23, "Connection shutdown failed during suspend"); 1772 } else { 1773 printk(KERN_WARNING "3w-sas: Suspend complete.\n"); 1774 } 1775 1776 /* Clear doorbell interrupt */ 1777 TWL_CLEAR_DB_INTERRUPT(tw_dev); 1778 1779 pci_save_state(pdev); 1780 pci_disable_device(pdev); 1781 pci_set_power_state(pdev, pci_choose_state(pdev, state)); 1782 1783 return 0; 1784 } /* End twl_suspend() */ 1785 1786 /* This function is called on PCI resume */ 1787 static int twl_resume(struct pci_dev *pdev) 1788 { 1789 int retval = 0; 1790 struct Scsi_Host *host = pci_get_drvdata(pdev); 1791 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; 1792 1793 printk(KERN_WARNING "3w-sas: Resuming host %d.\n", tw_dev->host->host_no); 1794 pci_set_power_state(pdev, PCI_D0); 1795 pci_enable_wake(pdev, PCI_D0, 0); 1796 pci_restore_state(pdev); 1797 1798 retval = pci_enable_device(pdev); 1799 if (retval) { 1800 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x24, "Enable device failed during resume"); 1801 return retval; 1802 } 1803 1804 pci_set_master(pdev); 1805 pci_try_set_mwi(pdev); 1806 1807 if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) || 1808 dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) { 1809 TW_PRINTK(host, TW_DRIVER, 0x25, "Failed to set dma mask during resume"); 1810 retval = -ENODEV; 1811 goto out_disable_device; 1812 } 1813 1814 /* Initialize the card */ 1815 if (twl_reset_sequence(tw_dev, 0)) { 1816 retval = -ENODEV; 1817 goto out_disable_device; 1818 } 1819 1820 /* Now setup the interrupt handler */ 1821 retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas", tw_dev); 1822 if (retval) { 1823 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x26, "Error requesting IRQ during resume"); 1824 retval = -ENODEV; 1825 goto out_disable_device; 1826 } 1827 1828 /* Now enable MSI if enabled */ 1829 if (test_bit(TW_USING_MSI, &tw_dev->flags)) 1830 pci_enable_msi(pdev); 1831 1832 /* Re-enable interrupts on the card */ 1833 TWL_UNMASK_INTERRUPTS(tw_dev); 1834 1835 printk(KERN_WARNING "3w-sas: Resume complete.\n"); 1836 return 0; 1837 1838 out_disable_device: 1839 scsi_remove_host(host); 1840 pci_disable_device(pdev); 1841 1842 return retval; 1843 } /* End twl_resume() */ 1844 #endif 1845 1846 /* PCI Devices supported by this driver */ 1847 static struct pci_device_id twl_pci_tbl[] = { 1848 { PCI_VDEVICE(3WARE, PCI_DEVICE_ID_3WARE_9750) }, 1849 { } 1850 }; 1851 MODULE_DEVICE_TABLE(pci, twl_pci_tbl); 1852 1853 /* pci_driver initializer */ 1854 static struct pci_driver twl_driver = { 1855 .name = "3w-sas", 1856 .id_table = twl_pci_tbl, 1857 .probe = twl_probe, 1858 .remove = twl_remove, 1859 #ifdef CONFIG_PM 1860 .suspend = twl_suspend, 1861 .resume = twl_resume, 1862 #endif 1863 .shutdown = twl_shutdown 1864 }; 1865 1866 /* This function is called on driver initialization */ 1867 static int __init twl_init(void) 1868 { 1869 printk(KERN_INFO "LSI 3ware SAS/SATA-RAID Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION); 1870 1871 return pci_register_driver(&twl_driver); 1872 } /* End twl_init() */ 1873 1874 /* This function is called on driver exit */ 1875 static void __exit twl_exit(void) 1876 { 1877 pci_unregister_driver(&twl_driver); 1878 } /* End twl_exit() */ 1879 1880 module_init(twl_init); 1881 module_exit(twl_exit); 1882 1883