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