3w-sas.c revision c45d15d24eb2b49bf734e1e5e7e103befb76b19b
1/* 2 3w-sas.c -- LSI 3ware SAS/SATA-RAID Controller device driver for Linux. 3 4 Written By: Adam Radford <linuxraid@lsi.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 linuxraid@lsi.com 47 48 For more information, goto: 49 http://www.lsi.com 50 51 History 52 ------- 53 3.26.02.000 - Initial driver release. 54*/ 55 56#include <linux/module.h> 57#include <linux/reboot.h> 58#include <linux/spinlock.h> 59#include <linux/interrupt.h> 60#include <linux/moduleparam.h> 61#include <linux/errno.h> 62#include <linux/types.h> 63#include <linux/delay.h> 64#include <linux/pci.h> 65#include <linux/time.h> 66#include <linux/mutex.h> 67#include <linux/slab.h> 68#include <asm/io.h> 69#include <asm/irq.h> 70#include <asm/uaccess.h> 71#include <scsi/scsi.h> 72#include <scsi/scsi_host.h> 73#include <scsi/scsi_tcq.h> 74#include <scsi/scsi_cmnd.h> 75#include "3w-sas.h" 76 77/* Globals */ 78#define TW_DRIVER_VERSION "3.26.02.000" 79static DEFINE_MUTEX(twl_chrdev_mutex); 80static TW_Device_Extension *twl_device_extension_list[TW_MAX_SLOT]; 81static unsigned int twl_device_extension_count; 82static int twl_major = -1; 83extern struct timezone sys_tz; 84 85/* Module parameters */ 86MODULE_AUTHOR ("LSI"); 87MODULE_DESCRIPTION ("LSI 3ware SAS/SATA-RAID Linux Driver"); 88MODULE_LICENSE("GPL"); 89MODULE_VERSION(TW_DRIVER_VERSION); 90 91static int use_msi; 92module_param(use_msi, int, S_IRUGO); 93MODULE_PARM_DESC(use_msi, "Use Message Signaled Interrupts. Default: 0"); 94 95/* Function prototypes */ 96static int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset); 97 98/* Functions */ 99 100/* This function returns AENs through sysfs */ 101static ssize_t twl_sysfs_aen_read(struct file *filp, struct kobject *kobj, 102 struct bin_attribute *bin_attr, 103 char *outbuf, loff_t offset, size_t count) 104{ 105 struct device *dev = container_of(kobj, struct device, kobj); 106 struct Scsi_Host *shost = class_to_shost(dev); 107 TW_Device_Extension *tw_dev = (TW_Device_Extension *)shost->hostdata; 108 unsigned long flags = 0; 109 ssize_t ret; 110 111 if (!capable(CAP_SYS_ADMIN)) 112 return -EACCES; 113 114 spin_lock_irqsave(tw_dev->host->host_lock, flags); 115 ret = memory_read_from_buffer(outbuf, count, &offset, tw_dev->event_queue[0], sizeof(TW_Event) * TW_Q_LENGTH); 116 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 117 118 return ret; 119} /* End twl_sysfs_aen_read() */ 120 121/* aen_read sysfs attribute initializer */ 122static struct bin_attribute twl_sysfs_aen_read_attr = { 123 .attr = { 124 .name = "3ware_aen_read", 125 .mode = S_IRUSR, 126 }, 127 .size = 0, 128 .read = twl_sysfs_aen_read 129}; 130 131/* This function returns driver compatibility info through sysfs */ 132static ssize_t twl_sysfs_compat_info(struct file *filp, struct kobject *kobj, 133 struct bin_attribute *bin_attr, 134 char *outbuf, loff_t offset, size_t count) 135{ 136 struct device *dev = container_of(kobj, struct device, kobj); 137 struct Scsi_Host *shost = class_to_shost(dev); 138 TW_Device_Extension *tw_dev = (TW_Device_Extension *)shost->hostdata; 139 unsigned long flags = 0; 140 ssize_t ret; 141 142 if (!capable(CAP_SYS_ADMIN)) 143 return -EACCES; 144 145 spin_lock_irqsave(tw_dev->host->host_lock, flags); 146 ret = memory_read_from_buffer(outbuf, count, &offset, &tw_dev->tw_compat_info, sizeof(TW_Compatibility_Info)); 147 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 148 149 return ret; 150} /* End twl_sysfs_compat_info() */ 151 152/* compat_info sysfs attribute initializer */ 153static struct bin_attribute twl_sysfs_compat_info_attr = { 154 .attr = { 155 .name = "3ware_compat_info", 156 .mode = S_IRUSR, 157 }, 158 .size = 0, 159 .read = twl_sysfs_compat_info 160}; 161 162/* Show some statistics about the card */ 163static ssize_t twl_show_stats(struct device *dev, 164 struct device_attribute *attr, char *buf) 165{ 166 struct Scsi_Host *host = class_to_shost(dev); 167 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; 168 unsigned long flags = 0; 169 ssize_t len; 170 171 spin_lock_irqsave(tw_dev->host->host_lock, flags); 172 len = snprintf(buf, PAGE_SIZE, "3w-sas Driver version: %s\n" 173 "Current commands posted: %4d\n" 174 "Max commands posted: %4d\n" 175 "Last sgl length: %4d\n" 176 "Max sgl length: %4d\n" 177 "Last sector count: %4d\n" 178 "Max sector count: %4d\n" 179 "SCSI Host Resets: %4d\n" 180 "AEN's: %4d\n", 181 TW_DRIVER_VERSION, 182 tw_dev->posted_request_count, 183 tw_dev->max_posted_request_count, 184 tw_dev->sgl_entries, 185 tw_dev->max_sgl_entries, 186 tw_dev->sector_count, 187 tw_dev->max_sector_count, 188 tw_dev->num_resets, 189 tw_dev->aen_count); 190 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 191 return len; 192} /* End twl_show_stats() */ 193 194/* This function will set a devices queue depth */ 195static int twl_change_queue_depth(struct scsi_device *sdev, int queue_depth, 196 int reason) 197{ 198 if (reason != SCSI_QDEPTH_DEFAULT) 199 return -EOPNOTSUPP; 200 201 if (queue_depth > TW_Q_LENGTH-2) 202 queue_depth = TW_Q_LENGTH-2; 203 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth); 204 return queue_depth; 205} /* End twl_change_queue_depth() */ 206 207/* stats sysfs attribute initializer */ 208static struct device_attribute twl_host_stats_attr = { 209 .attr = { 210 .name = "3ware_stats", 211 .mode = S_IRUGO, 212 }, 213 .show = twl_show_stats 214}; 215 216/* Host attributes initializer */ 217static struct device_attribute *twl_host_attrs[] = { 218 &twl_host_stats_attr, 219 NULL, 220}; 221 222/* This function will look up an AEN severity string */ 223static char *twl_aen_severity_lookup(unsigned char severity_code) 224{ 225 char *retval = NULL; 226 227 if ((severity_code < (unsigned char) TW_AEN_SEVERITY_ERROR) || 228 (severity_code > (unsigned char) TW_AEN_SEVERITY_DEBUG)) 229 goto out; 230 231 retval = twl_aen_severity_table[severity_code]; 232out: 233 return retval; 234} /* End twl_aen_severity_lookup() */ 235 236/* This function will queue an event */ 237static void twl_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header) 238{ 239 u32 local_time; 240 struct timeval time; 241 TW_Event *event; 242 unsigned short aen; 243 char host[16]; 244 char *error_str; 245 246 tw_dev->aen_count++; 247 248 /* Fill out event info */ 249 event = tw_dev->event_queue[tw_dev->error_index]; 250 251 host[0] = '\0'; 252 if (tw_dev->host) 253 sprintf(host, " scsi%d:", tw_dev->host->host_no); 254 255 aen = le16_to_cpu(header->status_block.error); 256 memset(event, 0, sizeof(TW_Event)); 257 258 event->severity = TW_SEV_OUT(header->status_block.severity__reserved); 259 do_gettimeofday(&time); 260 local_time = (u32)(time.tv_sec - (sys_tz.tz_minuteswest * 60)); 261 event->time_stamp_sec = local_time; 262 event->aen_code = aen; 263 event->retrieved = TW_AEN_NOT_RETRIEVED; 264 event->sequence_id = tw_dev->error_sequence_id; 265 tw_dev->error_sequence_id++; 266 267 /* Check for embedded error string */ 268 error_str = &(header->err_specific_desc[strlen(header->err_specific_desc)+1]); 269 270 header->err_specific_desc[sizeof(header->err_specific_desc) - 1] = '\0'; 271 event->parameter_len = strlen(header->err_specific_desc); 272 memcpy(event->parameter_data, header->err_specific_desc, event->parameter_len + 1 + strlen(error_str)); 273 if (event->severity != TW_AEN_SEVERITY_DEBUG) 274 printk(KERN_WARNING "3w-sas:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n", 275 host, 276 twl_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)), 277 TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen, error_str, 278 header->err_specific_desc); 279 else 280 tw_dev->aen_count--; 281 282 tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH; 283} /* End twl_aen_queue_event() */ 284 285/* This function will attempt to post a command packet to the board */ 286static int twl_post_command_packet(TW_Device_Extension *tw_dev, int request_id) 287{ 288 dma_addr_t command_que_value; 289 290 command_que_value = tw_dev->command_packet_phys[request_id]; 291 command_que_value += TW_COMMAND_OFFSET; 292 293 /* First write upper 4 bytes */ 294 writel((u32)((u64)command_que_value >> 32), TWL_HIBQPH_REG_ADDR(tw_dev)); 295 /* Then the lower 4 bytes */ 296 writel((u32)(command_que_value | TWL_PULL_MODE), TWL_HIBQPL_REG_ADDR(tw_dev)); 297 298 tw_dev->state[request_id] = TW_S_POSTED; 299 tw_dev->posted_request_count++; 300 if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) 301 tw_dev->max_posted_request_count = tw_dev->posted_request_count; 302 303 return 0; 304} /* End twl_post_command_packet() */ 305 306/* This function will perform a pci-dma mapping for a scatter gather list */ 307static int twl_map_scsi_sg_data(TW_Device_Extension *tw_dev, int request_id) 308{ 309 int use_sg; 310 struct scsi_cmnd *cmd = tw_dev->srb[request_id]; 311 312 use_sg = scsi_dma_map(cmd); 313 if (!use_sg) 314 return 0; 315 else if (use_sg < 0) { 316 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Failed to map scatter gather list"); 317 return 0; 318 } 319 320 cmd->SCp.phase = TW_PHASE_SGLIST; 321 cmd->SCp.have_data_in = use_sg; 322 323 return use_sg; 324} /* End twl_map_scsi_sg_data() */ 325 326/* This function hands scsi cdb's to the firmware */ 327static int twl_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry_ISO *sglistarg) 328{ 329 TW_Command_Full *full_command_packet; 330 TW_Command_Apache *command_packet; 331 int i, sg_count; 332 struct scsi_cmnd *srb = NULL; 333 struct scatterlist *sglist = NULL, *sg; 334 int retval = 1; 335 336 if (tw_dev->srb[request_id]) { 337 srb = tw_dev->srb[request_id]; 338 if (scsi_sglist(srb)) 339 sglist = scsi_sglist(srb); 340 } 341 342 /* Initialize command packet */ 343 full_command_packet = tw_dev->command_packet_virt[request_id]; 344 full_command_packet->header.header_desc.size_header = 128; 345 full_command_packet->header.status_block.error = 0; 346 full_command_packet->header.status_block.severity__reserved = 0; 347 348 command_packet = &full_command_packet->command.newcommand; 349 command_packet->status = 0; 350 command_packet->opcode__reserved = TW_OPRES_IN(0, TW_OP_EXECUTE_SCSI); 351 352 /* We forced 16 byte cdb use earlier */ 353 if (!cdb) 354 memcpy(command_packet->cdb, srb->cmnd, TW_MAX_CDB_LEN); 355 else 356 memcpy(command_packet->cdb, cdb, TW_MAX_CDB_LEN); 357 358 if (srb) { 359 command_packet->unit = srb->device->id; 360 command_packet->request_id__lunl = 361 cpu_to_le16(TW_REQ_LUN_IN(srb->device->lun, request_id)); 362 } else { 363 command_packet->request_id__lunl = 364 cpu_to_le16(TW_REQ_LUN_IN(0, request_id)); 365 command_packet->unit = 0; 366 } 367 368 command_packet->sgl_offset = 16; 369 370 if (!sglistarg) { 371 /* Map sglist from scsi layer to cmd packet */ 372 if (scsi_sg_count(srb)) { 373 sg_count = twl_map_scsi_sg_data(tw_dev, request_id); 374 if (sg_count == 0) 375 goto out; 376 377 scsi_for_each_sg(srb, sg, sg_count, i) { 378 command_packet->sg_list[i].address = TW_CPU_TO_SGL(sg_dma_address(sg)); 379 command_packet->sg_list[i].length = TW_CPU_TO_SGL(sg_dma_len(sg)); 380 } 381 command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN((srb->device->lun >> 4), scsi_sg_count(tw_dev->srb[request_id]))); 382 } 383 } else { 384 /* Internal cdb post */ 385 for (i = 0; i < use_sg; i++) { 386 command_packet->sg_list[i].address = TW_CPU_TO_SGL(sglistarg[i].address); 387 command_packet->sg_list[i].length = TW_CPU_TO_SGL(sglistarg[i].length); 388 } 389 command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN(0, use_sg)); 390 } 391 392 /* Update some stats */ 393 if (srb) { 394 tw_dev->sector_count = scsi_bufflen(srb) / 512; 395 if (tw_dev->sector_count > tw_dev->max_sector_count) 396 tw_dev->max_sector_count = tw_dev->sector_count; 397 tw_dev->sgl_entries = scsi_sg_count(srb); 398 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries) 399 tw_dev->max_sgl_entries = tw_dev->sgl_entries; 400 } 401 402 /* Now post the command to the board */ 403 retval = twl_post_command_packet(tw_dev, request_id); 404 405out: 406 return retval; 407} /* End twl_scsiop_execute_scsi() */ 408 409/* This function will read the aen queue from the isr */ 410static int twl_aen_read_queue(TW_Device_Extension *tw_dev, int request_id) 411{ 412 char cdb[TW_MAX_CDB_LEN]; 413 TW_SG_Entry_ISO sglist[1]; 414 TW_Command_Full *full_command_packet; 415 int retval = 1; 416 417 full_command_packet = tw_dev->command_packet_virt[request_id]; 418 memset(full_command_packet, 0, sizeof(TW_Command_Full)); 419 420 /* Initialize cdb */ 421 memset(&cdb, 0, TW_MAX_CDB_LEN); 422 cdb[0] = REQUEST_SENSE; /* opcode */ 423 cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */ 424 425 /* Initialize sglist */ 426 memset(&sglist, 0, sizeof(TW_SG_Entry_ISO)); 427 sglist[0].length = TW_SECTOR_SIZE; 428 sglist[0].address = tw_dev->generic_buffer_phys[request_id]; 429 430 /* Mark internal command */ 431 tw_dev->srb[request_id] = NULL; 432 433 /* Now post the command packet */ 434 if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) { 435 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Post failed while reading AEN queue"); 436 goto out; 437 } 438 retval = 0; 439out: 440 return retval; 441} /* End twl_aen_read_queue() */ 442 443/* This function will sync firmware time with the host time */ 444static void twl_aen_sync_time(TW_Device_Extension *tw_dev, int request_id) 445{ 446 u32 schedulertime; 447 struct timeval utc; 448 TW_Command_Full *full_command_packet; 449 TW_Command *command_packet; 450 TW_Param_Apache *param; 451 u32 local_time; 452 453 /* Fill out the command packet */ 454 full_command_packet = tw_dev->command_packet_virt[request_id]; 455 memset(full_command_packet, 0, sizeof(TW_Command_Full)); 456 command_packet = &full_command_packet->command.oldcommand; 457 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM); 458 command_packet->request_id = request_id; 459 command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]); 460 command_packet->byte8_offset.param.sgl[0].length = TW_CPU_TO_SGL(TW_SECTOR_SIZE); 461 command_packet->size = TW_COMMAND_SIZE; 462 command_packet->byte6_offset.parameter_count = cpu_to_le16(1); 463 464 /* Setup the param */ 465 param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id]; 466 memset(param, 0, TW_SECTOR_SIZE); 467 param->table_id = cpu_to_le16(TW_TIMEKEEP_TABLE | 0x8000); /* Controller time keep table */ 468 param->parameter_id = cpu_to_le16(0x3); /* SchedulerTime */ 469 param->parameter_size_bytes = cpu_to_le16(4); 470 471 /* Convert system time in UTC to local time seconds since last 472 Sunday 12:00AM */ 473 do_gettimeofday(&utc); 474 local_time = (u32)(utc.tv_sec - (sys_tz.tz_minuteswest * 60)); 475 schedulertime = local_time - (3 * 86400); 476 schedulertime = cpu_to_le32(schedulertime % 604800); 477 478 memcpy(param->data, &schedulertime, sizeof(u32)); 479 480 /* Mark internal command */ 481 tw_dev->srb[request_id] = NULL; 482 483 /* Now post the command */ 484 twl_post_command_packet(tw_dev, request_id); 485} /* End twl_aen_sync_time() */ 486 487/* This function will assign an available request id */ 488static void twl_get_request_id(TW_Device_Extension *tw_dev, int *request_id) 489{ 490 *request_id = tw_dev->free_queue[tw_dev->free_head]; 491 tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH; 492 tw_dev->state[*request_id] = TW_S_STARTED; 493} /* End twl_get_request_id() */ 494 495/* This function will free a request id */ 496static void twl_free_request_id(TW_Device_Extension *tw_dev, int request_id) 497{ 498 tw_dev->free_queue[tw_dev->free_tail] = request_id; 499 tw_dev->state[request_id] = TW_S_FINISHED; 500 tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH; 501} /* End twl_free_request_id() */ 502 503/* This function will complete an aen request from the isr */ 504static int twl_aen_complete(TW_Device_Extension *tw_dev, int request_id) 505{ 506 TW_Command_Full *full_command_packet; 507 TW_Command *command_packet; 508 TW_Command_Apache_Header *header; 509 unsigned short aen; 510 int retval = 1; 511 512 header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id]; 513 tw_dev->posted_request_count--; 514 aen = le16_to_cpu(header->status_block.error); 515 full_command_packet = tw_dev->command_packet_virt[request_id]; 516 command_packet = &full_command_packet->command.oldcommand; 517 518 /* First check for internal completion of set param for time sync */ 519 if (TW_OP_OUT(command_packet->opcode__sgloffset) == TW_OP_SET_PARAM) { 520 /* Keep reading the queue in case there are more aen's */ 521 if (twl_aen_read_queue(tw_dev, request_id)) 522 goto out2; 523 else { 524 retval = 0; 525 goto out; 526 } 527 } 528 529 switch (aen) { 530 case TW_AEN_QUEUE_EMPTY: 531 /* Quit reading the queue if this is the last one */ 532 break; 533 case TW_AEN_SYNC_TIME_WITH_HOST: 534 twl_aen_sync_time(tw_dev, request_id); 535 retval = 0; 536 goto out; 537 default: 538 twl_aen_queue_event(tw_dev, header); 539 540 /* If there are more aen's, keep reading the queue */ 541 if (twl_aen_read_queue(tw_dev, request_id)) 542 goto out2; 543 else { 544 retval = 0; 545 goto out; 546 } 547 } 548 retval = 0; 549out2: 550 tw_dev->state[request_id] = TW_S_COMPLETED; 551 twl_free_request_id(tw_dev, request_id); 552 clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags); 553out: 554 return retval; 555} /* End twl_aen_complete() */ 556 557/* This function will poll for a response */ 558static int twl_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds) 559{ 560 unsigned long before; 561 dma_addr_t mfa; 562 u32 regh, regl; 563 u32 response; 564 int retval = 1; 565 int found = 0; 566 567 before = jiffies; 568 569 while (!found) { 570 if (sizeof(dma_addr_t) > 4) { 571 regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev)); 572 regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev)); 573 mfa = ((u64)regh << 32) | regl; 574 } else 575 mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev)); 576 577 response = (u32)mfa; 578 579 if (TW_RESID_OUT(response) == request_id) 580 found = 1; 581 582 if (time_after(jiffies, before + HZ * seconds)) 583 goto out; 584 585 msleep(50); 586 } 587 retval = 0; 588out: 589 return retval; 590} /* End twl_poll_response() */ 591 592/* This function will drain the aen queue */ 593static int twl_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset) 594{ 595 int request_id = 0; 596 char cdb[TW_MAX_CDB_LEN]; 597 TW_SG_Entry_ISO sglist[1]; 598 int finished = 0, count = 0; 599 TW_Command_Full *full_command_packet; 600 TW_Command_Apache_Header *header; 601 unsigned short aen; 602 int first_reset = 0, queue = 0, retval = 1; 603 604 if (no_check_reset) 605 first_reset = 0; 606 else 607 first_reset = 1; 608 609 full_command_packet = tw_dev->command_packet_virt[request_id]; 610 memset(full_command_packet, 0, sizeof(TW_Command_Full)); 611 612 /* Initialize cdb */ 613 memset(&cdb, 0, TW_MAX_CDB_LEN); 614 cdb[0] = REQUEST_SENSE; /* opcode */ 615 cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */ 616 617 /* Initialize sglist */ 618 memset(&sglist, 0, sizeof(TW_SG_Entry_ISO)); 619 sglist[0].length = TW_SECTOR_SIZE; 620 sglist[0].address = tw_dev->generic_buffer_phys[request_id]; 621 622 /* Mark internal command */ 623 tw_dev->srb[request_id] = NULL; 624 625 do { 626 /* Send command to the board */ 627 if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) { 628 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "Error posting request sense"); 629 goto out; 630 } 631 632 /* Now poll for completion */ 633 if (twl_poll_response(tw_dev, request_id, 30)) { 634 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "No valid response while draining AEN queue"); 635 tw_dev->posted_request_count--; 636 goto out; 637 } 638 639 tw_dev->posted_request_count--; 640 header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id]; 641 aen = le16_to_cpu(header->status_block.error); 642 queue = 0; 643 count++; 644 645 switch (aen) { 646 case TW_AEN_QUEUE_EMPTY: 647 if (first_reset != 1) 648 goto out; 649 else 650 finished = 1; 651 break; 652 case TW_AEN_SOFT_RESET: 653 if (first_reset == 0) 654 first_reset = 1; 655 else 656 queue = 1; 657 break; 658 case TW_AEN_SYNC_TIME_WITH_HOST: 659 break; 660 default: 661 queue = 1; 662 } 663 664 /* Now queue an event info */ 665 if (queue) 666 twl_aen_queue_event(tw_dev, header); 667 } while ((finished == 0) && (count < TW_MAX_AEN_DRAIN)); 668 669 if (count == TW_MAX_AEN_DRAIN) 670 goto out; 671 672 retval = 0; 673out: 674 tw_dev->state[request_id] = TW_S_INITIAL; 675 return retval; 676} /* End twl_aen_drain_queue() */ 677 678/* This function will allocate memory and check if it is correctly aligned */ 679static int twl_allocate_memory(TW_Device_Extension *tw_dev, int size, int which) 680{ 681 int i; 682 dma_addr_t dma_handle; 683 unsigned long *cpu_addr; 684 int retval = 1; 685 686 cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle); 687 if (!cpu_addr) { 688 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed"); 689 goto out; 690 } 691 692 memset(cpu_addr, 0, size*TW_Q_LENGTH); 693 694 for (i = 0; i < TW_Q_LENGTH; i++) { 695 switch(which) { 696 case 0: 697 tw_dev->command_packet_phys[i] = dma_handle+(i*size); 698 tw_dev->command_packet_virt[i] = (TW_Command_Full *)((unsigned char *)cpu_addr + (i*size)); 699 break; 700 case 1: 701 tw_dev->generic_buffer_phys[i] = dma_handle+(i*size); 702 tw_dev->generic_buffer_virt[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size)); 703 break; 704 case 2: 705 tw_dev->sense_buffer_phys[i] = dma_handle+(i*size); 706 tw_dev->sense_buffer_virt[i] = (TW_Command_Apache_Header *)((unsigned char *)cpu_addr + (i*size)); 707 break; 708 } 709 } 710 retval = 0; 711out: 712 return retval; 713} /* End twl_allocate_memory() */ 714 715/* This function will load the request id and various sgls for ioctls */ 716static 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) 717{ 718 TW_Command *oldcommand; 719 TW_Command_Apache *newcommand; 720 TW_SG_Entry_ISO *sgl; 721 unsigned int pae = 0; 722 723 if ((sizeof(long) < 8) && (sizeof(dma_addr_t) > 4)) 724 pae = 1; 725 726 if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) { 727 newcommand = &full_command_packet->command.newcommand; 728 newcommand->request_id__lunl = 729 cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id)); 730 if (length) { 731 newcommand->sg_list[0].address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1); 732 newcommand->sg_list[0].length = TW_CPU_TO_SGL(length); 733 } 734 newcommand->sgl_entries__lunh = 735 cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), length ? 1 : 0)); 736 } else { 737 oldcommand = &full_command_packet->command.oldcommand; 738 oldcommand->request_id = request_id; 739 740 if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) { 741 /* Load the sg list */ 742 sgl = (TW_SG_Entry_ISO *)((u32 *)oldcommand+oldcommand->size - (sizeof(TW_SG_Entry_ISO)/4) + pae + (sizeof(dma_addr_t) > 4 ? 1 : 0)); 743 sgl->address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1); 744 sgl->length = TW_CPU_TO_SGL(length); 745 oldcommand->size += pae; 746 oldcommand->size += sizeof(dma_addr_t) > 4 ? 1 : 0; 747 } 748 } 749} /* End twl_load_sgl() */ 750 751/* This function handles ioctl for the character device 752 This interface is used by smartmontools open source software */ 753static long twl_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 754{ 755 long timeout; 756 unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0; 757 dma_addr_t dma_handle; 758 int request_id = 0; 759 TW_Ioctl_Driver_Command driver_command; 760 struct inode *inode = file->f_dentry->d_inode; 761 TW_Ioctl_Buf_Apache *tw_ioctl; 762 TW_Command_Full *full_command_packet; 763 TW_Device_Extension *tw_dev = twl_device_extension_list[iminor(inode)]; 764 int retval = -EFAULT; 765 void __user *argp = (void __user *)arg; 766 767 mutex_lock(&twl_chrdev_mutex); 768 769 /* Only let one of these through at a time */ 770 if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) { 771 retval = -EINTR; 772 goto out; 773 } 774 775 /* First copy down the driver command */ 776 if (copy_from_user(&driver_command, argp, sizeof(TW_Ioctl_Driver_Command))) 777 goto out2; 778 779 /* Check data buffer size */ 780 if (driver_command.buffer_length > TW_MAX_SECTORS * 2048) { 781 retval = -EINVAL; 782 goto out2; 783 } 784 785 /* Hardware can only do multiple of 512 byte transfers */ 786 data_buffer_length_adjusted = (driver_command.buffer_length + 511) & ~511; 787 788 /* Now allocate ioctl buf memory */ 789 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); 790 if (!cpu_addr) { 791 retval = -ENOMEM; 792 goto out2; 793 } 794 795 tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr; 796 797 /* Now copy down the entire ioctl */ 798 if (copy_from_user(tw_ioctl, argp, driver_command.buffer_length + sizeof(TW_Ioctl_Buf_Apache) - 1)) 799 goto out3; 800 801 /* See which ioctl we are doing */ 802 switch (cmd) { 803 case TW_IOCTL_FIRMWARE_PASS_THROUGH: 804 spin_lock_irqsave(tw_dev->host->host_lock, flags); 805 twl_get_request_id(tw_dev, &request_id); 806 807 /* Flag internal command */ 808 tw_dev->srb[request_id] = NULL; 809 810 /* Flag chrdev ioctl */ 811 tw_dev->chrdev_request_id = request_id; 812 813 full_command_packet = (TW_Command_Full *)&tw_ioctl->firmware_command; 814 815 /* Load request id and sglist for both command types */ 816 twl_load_sgl(tw_dev, full_command_packet, request_id, dma_handle, data_buffer_length_adjusted); 817 818 memcpy(tw_dev->command_packet_virt[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command_Full)); 819 820 /* Now post the command packet to the controller */ 821 twl_post_command_packet(tw_dev, request_id); 822 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 823 824 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ; 825 826 /* Now wait for command to complete */ 827 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout); 828 829 /* We timed out, and didn't get an interrupt */ 830 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) { 831 /* Now we need to reset the board */ 832 printk(KERN_WARNING "3w-sas: scsi%d: WARNING: (0x%02X:0x%04X): Character ioctl (0x%x) timed out, resetting card.\n", 833 tw_dev->host->host_no, TW_DRIVER, 0x6, 834 cmd); 835 retval = -EIO; 836 twl_reset_device_extension(tw_dev, 1); 837 goto out3; 838 } 839 840 /* Now copy in the command packet response */ 841 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virt[request_id], sizeof(TW_Command_Full)); 842 843 /* Now complete the io */ 844 spin_lock_irqsave(tw_dev->host->host_lock, flags); 845 tw_dev->posted_request_count--; 846 tw_dev->state[request_id] = TW_S_COMPLETED; 847 twl_free_request_id(tw_dev, request_id); 848 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 849 break; 850 default: 851 retval = -ENOTTY; 852 goto out3; 853 } 854 855 /* Now copy the entire response to userspace */ 856 if (copy_to_user(argp, tw_ioctl, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length - 1) == 0) 857 retval = 0; 858out3: 859 /* Now free ioctl buf memory */ 860 dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, cpu_addr, dma_handle); 861out2: 862 mutex_unlock(&tw_dev->ioctl_lock); 863out: 864 mutex_unlock(&twl_chrdev_mutex); 865 return retval; 866} /* End twl_chrdev_ioctl() */ 867 868/* This function handles open for the character device */ 869static int twl_chrdev_open(struct inode *inode, struct file *file) 870{ 871 unsigned int minor_number; 872 int retval = -ENODEV; 873 874 if (!capable(CAP_SYS_ADMIN)) { 875 retval = -EACCES; 876 goto out; 877 } 878 879 minor_number = iminor(inode); 880 if (minor_number >= twl_device_extension_count) 881 goto out; 882 retval = 0; 883out: 884 return retval; 885} /* End twl_chrdev_open() */ 886 887/* File operations struct for character device */ 888static const struct file_operations twl_fops = { 889 .owner = THIS_MODULE, 890 .unlocked_ioctl = twl_chrdev_ioctl, 891 .open = twl_chrdev_open, 892 .release = NULL 893}; 894 895/* This function passes sense data from firmware to scsi layer */ 896static int twl_fill_sense(TW_Device_Extension *tw_dev, int i, int request_id, int copy_sense, int print_host) 897{ 898 TW_Command_Apache_Header *header; 899 TW_Command_Full *full_command_packet; 900 unsigned short error; 901 char *error_str; 902 int retval = 1; 903 904 header = tw_dev->sense_buffer_virt[i]; 905 full_command_packet = tw_dev->command_packet_virt[request_id]; 906 907 /* Get embedded firmware error string */ 908 error_str = &(header->err_specific_desc[strlen(header->err_specific_desc) + 1]); 909 910 /* Don't print error for Logical unit not supported during rollcall */ 911 error = le16_to_cpu(header->status_block.error); 912 if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error != TW_ERROR_UNIT_OFFLINE) && (error != TW_ERROR_INVALID_FIELD_IN_CDB)) { 913 if (print_host) 914 printk(KERN_WARNING "3w-sas: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n", 915 tw_dev->host->host_no, 916 TW_MESSAGE_SOURCE_CONTROLLER_ERROR, 917 header->status_block.error, 918 error_str, 919 header->err_specific_desc); 920 else 921 printk(KERN_WARNING "3w-sas: ERROR: (0x%02X:0x%04X): %s:%s.\n", 922 TW_MESSAGE_SOURCE_CONTROLLER_ERROR, 923 header->status_block.error, 924 error_str, 925 header->err_specific_desc); 926 } 927 928 if (copy_sense) { 929 memcpy(tw_dev->srb[request_id]->sense_buffer, header->sense_data, TW_SENSE_DATA_LENGTH); 930 tw_dev->srb[request_id]->result = (full_command_packet->command.newcommand.status << 1); 931 goto out; 932 } 933out: 934 return retval; 935} /* End twl_fill_sense() */ 936 937/* This function will free up device extension resources */ 938static void twl_free_device_extension(TW_Device_Extension *tw_dev) 939{ 940 if (tw_dev->command_packet_virt[0]) 941 pci_free_consistent(tw_dev->tw_pci_dev, 942 sizeof(TW_Command_Full)*TW_Q_LENGTH, 943 tw_dev->command_packet_virt[0], 944 tw_dev->command_packet_phys[0]); 945 946 if (tw_dev->generic_buffer_virt[0]) 947 pci_free_consistent(tw_dev->tw_pci_dev, 948 TW_SECTOR_SIZE*TW_Q_LENGTH, 949 tw_dev->generic_buffer_virt[0], 950 tw_dev->generic_buffer_phys[0]); 951 952 if (tw_dev->sense_buffer_virt[0]) 953 pci_free_consistent(tw_dev->tw_pci_dev, 954 sizeof(TW_Command_Apache_Header)* 955 TW_Q_LENGTH, 956 tw_dev->sense_buffer_virt[0], 957 tw_dev->sense_buffer_phys[0]); 958 959 kfree(tw_dev->event_queue[0]); 960} /* End twl_free_device_extension() */ 961 962/* This function will get parameter table entries from the firmware */ 963static void *twl_get_param(TW_Device_Extension *tw_dev, int request_id, int table_id, int parameter_id, int parameter_size_bytes) 964{ 965 TW_Command_Full *full_command_packet; 966 TW_Command *command_packet; 967 TW_Param_Apache *param; 968 void *retval = NULL; 969 970 /* Setup the command packet */ 971 full_command_packet = tw_dev->command_packet_virt[request_id]; 972 memset(full_command_packet, 0, sizeof(TW_Command_Full)); 973 command_packet = &full_command_packet->command.oldcommand; 974 975 command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM); 976 command_packet->size = TW_COMMAND_SIZE; 977 command_packet->request_id = request_id; 978 command_packet->byte6_offset.block_count = cpu_to_le16(1); 979 980 /* Now setup the param */ 981 param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id]; 982 memset(param, 0, TW_SECTOR_SIZE); 983 param->table_id = cpu_to_le16(table_id | 0x8000); 984 param->parameter_id = cpu_to_le16(parameter_id); 985 param->parameter_size_bytes = cpu_to_le16(parameter_size_bytes); 986 987 command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]); 988 command_packet->byte8_offset.param.sgl[0].length = TW_CPU_TO_SGL(TW_SECTOR_SIZE); 989 990 /* Post the command packet to the board */ 991 twl_post_command_packet(tw_dev, request_id); 992 993 /* Poll for completion */ 994 if (twl_poll_response(tw_dev, request_id, 30)) 995 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "No valid response during get param") 996 else 997 retval = (void *)&(param->data[0]); 998 999 tw_dev->posted_request_count--; 1000 tw_dev->state[request_id] = TW_S_INITIAL; 1001 1002 return retval; 1003} /* End twl_get_param() */ 1004 1005/* This function will send an initconnection command to controller */ 1006static int twl_initconnection(TW_Device_Extension *tw_dev, int message_credits, 1007 u32 set_features, unsigned short current_fw_srl, 1008 unsigned short current_fw_arch_id, 1009 unsigned short current_fw_branch, 1010 unsigned short current_fw_build, 1011 unsigned short *fw_on_ctlr_srl, 1012 unsigned short *fw_on_ctlr_arch_id, 1013 unsigned short *fw_on_ctlr_branch, 1014 unsigned short *fw_on_ctlr_build, 1015 u32 *init_connect_result) 1016{ 1017 TW_Command_Full *full_command_packet; 1018 TW_Initconnect *tw_initconnect; 1019 int request_id = 0, retval = 1; 1020 1021 /* Initialize InitConnection command packet */ 1022 full_command_packet = tw_dev->command_packet_virt[request_id]; 1023 memset(full_command_packet, 0, sizeof(TW_Command_Full)); 1024 full_command_packet->header.header_desc.size_header = 128; 1025 1026 tw_initconnect = (TW_Initconnect *)&full_command_packet->command.oldcommand; 1027 tw_initconnect->opcode__reserved = TW_OPRES_IN(0, TW_OP_INIT_CONNECTION); 1028 tw_initconnect->request_id = request_id; 1029 tw_initconnect->message_credits = cpu_to_le16(message_credits); 1030 tw_initconnect->features = set_features; 1031 1032 /* Turn on 64-bit sgl support if we need to */ 1033 tw_initconnect->features |= sizeof(dma_addr_t) > 4 ? 1 : 0; 1034 1035 tw_initconnect->features = cpu_to_le32(tw_initconnect->features); 1036 1037 if (set_features & TW_EXTENDED_INIT_CONNECT) { 1038 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE_EXTENDED; 1039 tw_initconnect->fw_srl = cpu_to_le16(current_fw_srl); 1040 tw_initconnect->fw_arch_id = cpu_to_le16(current_fw_arch_id); 1041 tw_initconnect->fw_branch = cpu_to_le16(current_fw_branch); 1042 tw_initconnect->fw_build = cpu_to_le16(current_fw_build); 1043 } else 1044 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE; 1045 1046 /* Send command packet to the board */ 1047 twl_post_command_packet(tw_dev, request_id); 1048 1049 /* Poll for completion */ 1050 if (twl_poll_response(tw_dev, request_id, 30)) { 1051 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x8, "No valid response during init connection"); 1052 } else { 1053 if (set_features & TW_EXTENDED_INIT_CONNECT) { 1054 *fw_on_ctlr_srl = le16_to_cpu(tw_initconnect->fw_srl); 1055 *fw_on_ctlr_arch_id = le16_to_cpu(tw_initconnect->fw_arch_id); 1056 *fw_on_ctlr_branch = le16_to_cpu(tw_initconnect->fw_branch); 1057 *fw_on_ctlr_build = le16_to_cpu(tw_initconnect->fw_build); 1058 *init_connect_result = le32_to_cpu(tw_initconnect->result); 1059 } 1060 retval = 0; 1061 } 1062 1063 tw_dev->posted_request_count--; 1064 tw_dev->state[request_id] = TW_S_INITIAL; 1065 1066 return retval; 1067} /* End twl_initconnection() */ 1068 1069/* This function will initialize the fields of a device extension */ 1070static int twl_initialize_device_extension(TW_Device_Extension *tw_dev) 1071{ 1072 int i, retval = 1; 1073 1074 /* Initialize command packet buffers */ 1075 if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) { 1076 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x9, "Command packet memory allocation failed"); 1077 goto out; 1078 } 1079 1080 /* Initialize generic buffer */ 1081 if (twl_allocate_memory(tw_dev, TW_SECTOR_SIZE, 1)) { 1082 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xa, "Generic memory allocation failed"); 1083 goto out; 1084 } 1085 1086 /* Allocate sense buffers */ 1087 if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Apache_Header), 2)) { 1088 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xb, "Sense buffer allocation failed"); 1089 goto out; 1090 } 1091 1092 /* Allocate event info space */ 1093 tw_dev->event_queue[0] = kcalloc(TW_Q_LENGTH, sizeof(TW_Event), GFP_KERNEL); 1094 if (!tw_dev->event_queue[0]) { 1095 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xc, "Event info memory allocation failed"); 1096 goto out; 1097 } 1098 1099 for (i = 0; i < TW_Q_LENGTH; i++) { 1100 tw_dev->event_queue[i] = (TW_Event *)((unsigned char *)tw_dev->event_queue[0] + (i * sizeof(TW_Event))); 1101 tw_dev->free_queue[i] = i; 1102 tw_dev->state[i] = TW_S_INITIAL; 1103 } 1104 1105 tw_dev->free_head = TW_Q_START; 1106 tw_dev->free_tail = TW_Q_START; 1107 tw_dev->error_sequence_id = 1; 1108 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; 1109 1110 mutex_init(&tw_dev->ioctl_lock); 1111 init_waitqueue_head(&tw_dev->ioctl_wqueue); 1112 1113 retval = 0; 1114out: 1115 return retval; 1116} /* End twl_initialize_device_extension() */ 1117 1118/* This function will perform a pci-dma unmap */ 1119static void twl_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id) 1120{ 1121 struct scsi_cmnd *cmd = tw_dev->srb[request_id]; 1122 1123 if (cmd->SCp.phase == TW_PHASE_SGLIST) 1124 scsi_dma_unmap(cmd); 1125} /* End twl_unmap_scsi_data() */ 1126 1127/* This function will handle attention interrupts */ 1128static int twl_handle_attention_interrupt(TW_Device_Extension *tw_dev) 1129{ 1130 int retval = 1; 1131 u32 request_id, doorbell; 1132 1133 /* Read doorbell status */ 1134 doorbell = readl(TWL_HOBDB_REG_ADDR(tw_dev)); 1135 1136 /* Check for controller errors */ 1137 if (doorbell & TWL_DOORBELL_CONTROLLER_ERROR) { 1138 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xd, "Microcontroller Error: clearing"); 1139 goto out; 1140 } 1141 1142 /* Check if we need to perform an AEN drain */ 1143 if (doorbell & TWL_DOORBELL_ATTENTION_INTERRUPT) { 1144 if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) { 1145 twl_get_request_id(tw_dev, &request_id); 1146 if (twl_aen_read_queue(tw_dev, request_id)) { 1147 tw_dev->state[request_id] = TW_S_COMPLETED; 1148 twl_free_request_id(tw_dev, request_id); 1149 clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags); 1150 } 1151 } 1152 } 1153 1154 retval = 0; 1155out: 1156 /* Clear doorbell interrupt */ 1157 TWL_CLEAR_DB_INTERRUPT(tw_dev); 1158 1159 /* Make sure the clear was flushed by reading it back */ 1160 readl(TWL_HOBDBC_REG_ADDR(tw_dev)); 1161 1162 return retval; 1163} /* End twl_handle_attention_interrupt() */ 1164 1165/* Interrupt service routine */ 1166static irqreturn_t twl_interrupt(int irq, void *dev_instance) 1167{ 1168 TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance; 1169 int i, handled = 0, error = 0; 1170 dma_addr_t mfa = 0; 1171 u32 reg, regl, regh, response, request_id = 0; 1172 struct scsi_cmnd *cmd; 1173 TW_Command_Full *full_command_packet; 1174 1175 spin_lock(tw_dev->host->host_lock); 1176 1177 /* Read host interrupt status */ 1178 reg = readl(TWL_HISTAT_REG_ADDR(tw_dev)); 1179 1180 /* Check if this is our interrupt, otherwise bail */ 1181 if (!(reg & TWL_HISTATUS_VALID_INTERRUPT)) 1182 goto twl_interrupt_bail; 1183 1184 handled = 1; 1185 1186 /* If we are resetting, bail */ 1187 if (test_bit(TW_IN_RESET, &tw_dev->flags)) 1188 goto twl_interrupt_bail; 1189 1190 /* Attention interrupt */ 1191 if (reg & TWL_HISTATUS_ATTENTION_INTERRUPT) { 1192 if (twl_handle_attention_interrupt(tw_dev)) { 1193 TWL_MASK_INTERRUPTS(tw_dev); 1194 goto twl_interrupt_bail; 1195 } 1196 } 1197 1198 /* Response interrupt */ 1199 while (reg & TWL_HISTATUS_RESPONSE_INTERRUPT) { 1200 if (sizeof(dma_addr_t) > 4) { 1201 regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev)); 1202 regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev)); 1203 mfa = ((u64)regh << 32) | regl; 1204 } else 1205 mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev)); 1206 1207 error = 0; 1208 response = (u32)mfa; 1209 1210 /* Check for command packet error */ 1211 if (!TW_NOTMFA_OUT(response)) { 1212 for (i=0;i<TW_Q_LENGTH;i++) { 1213 if (tw_dev->sense_buffer_phys[i] == mfa) { 1214 request_id = le16_to_cpu(tw_dev->sense_buffer_virt[i]->header_desc.request_id); 1215 if (tw_dev->srb[request_id] != NULL) 1216 error = twl_fill_sense(tw_dev, i, request_id, 1, 1); 1217 else { 1218 /* Skip ioctl error prints */ 1219 if (request_id != tw_dev->chrdev_request_id) 1220 error = twl_fill_sense(tw_dev, i, request_id, 0, 1); 1221 else 1222 memcpy(tw_dev->command_packet_virt[request_id], tw_dev->sense_buffer_virt[i], sizeof(TW_Command_Apache_Header)); 1223 } 1224 1225 /* Now re-post the sense buffer */ 1226 writel((u32)((u64)tw_dev->sense_buffer_phys[i] >> 32), TWL_HOBQPH_REG_ADDR(tw_dev)); 1227 writel((u32)tw_dev->sense_buffer_phys[i], TWL_HOBQPL_REG_ADDR(tw_dev)); 1228 break; 1229 } 1230 } 1231 } else 1232 request_id = TW_RESID_OUT(response); 1233 1234 full_command_packet = tw_dev->command_packet_virt[request_id]; 1235 1236 /* Check for correct state */ 1237 if (tw_dev->state[request_id] != TW_S_POSTED) { 1238 if (tw_dev->srb[request_id] != NULL) { 1239 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xe, "Received a request id that wasn't posted"); 1240 TWL_MASK_INTERRUPTS(tw_dev); 1241 goto twl_interrupt_bail; 1242 } 1243 } 1244 1245 /* Check for internal command completion */ 1246 if (tw_dev->srb[request_id] == NULL) { 1247 if (request_id != tw_dev->chrdev_request_id) { 1248 if (twl_aen_complete(tw_dev, request_id)) 1249 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xf, "Error completing AEN during attention interrupt"); 1250 } else { 1251 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; 1252 wake_up(&tw_dev->ioctl_wqueue); 1253 } 1254 } else { 1255 cmd = tw_dev->srb[request_id]; 1256 1257 if (!error) 1258 cmd->result = (DID_OK << 16); 1259 1260 /* Report residual bytes for single sgl */ 1261 if ((scsi_sg_count(cmd) <= 1) && (full_command_packet->command.newcommand.status == 0)) { 1262 if (full_command_packet->command.newcommand.sg_list[0].length < scsi_bufflen(tw_dev->srb[request_id])) 1263 scsi_set_resid(cmd, scsi_bufflen(cmd) - full_command_packet->command.newcommand.sg_list[0].length); 1264 } 1265 1266 /* Now complete the io */ 1267 tw_dev->state[request_id] = TW_S_COMPLETED; 1268 twl_free_request_id(tw_dev, request_id); 1269 tw_dev->posted_request_count--; 1270 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]); 1271 twl_unmap_scsi_data(tw_dev, request_id); 1272 } 1273 1274 /* Check for another response interrupt */ 1275 reg = readl(TWL_HISTAT_REG_ADDR(tw_dev)); 1276 } 1277 1278twl_interrupt_bail: 1279 spin_unlock(tw_dev->host->host_lock); 1280 return IRQ_RETVAL(handled); 1281} /* End twl_interrupt() */ 1282 1283/* This function will poll for a register change */ 1284static int twl_poll_register(TW_Device_Extension *tw_dev, void *reg, u32 value, u32 result, int seconds) 1285{ 1286 unsigned long before; 1287 int retval = 1; 1288 u32 reg_value; 1289 1290 reg_value = readl(reg); 1291 before = jiffies; 1292 1293 while ((reg_value & value) != result) { 1294 reg_value = readl(reg); 1295 if (time_after(jiffies, before + HZ * seconds)) 1296 goto out; 1297 msleep(50); 1298 } 1299 retval = 0; 1300out: 1301 return retval; 1302} /* End twl_poll_register() */ 1303 1304/* This function will reset a controller */ 1305static int twl_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset) 1306{ 1307 int retval = 1; 1308 int i = 0; 1309 u32 status = 0; 1310 unsigned short fw_on_ctlr_srl = 0, fw_on_ctlr_arch_id = 0; 1311 unsigned short fw_on_ctlr_branch = 0, fw_on_ctlr_build = 0; 1312 u32 init_connect_result = 0; 1313 int tries = 0; 1314 int do_soft_reset = soft_reset; 1315 1316 while (tries < TW_MAX_RESET_TRIES) { 1317 /* Do a soft reset if one is needed */ 1318 if (do_soft_reset) { 1319 TWL_SOFT_RESET(tw_dev); 1320 1321 /* Make sure controller is in a good state */ 1322 if (twl_poll_register(tw_dev, TWL_SCRPD3_REG_ADDR(tw_dev), TWL_CONTROLLER_READY, 0x0, 30)) { 1323 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Controller never went non-ready during reset sequence"); 1324 tries++; 1325 continue; 1326 } 1327 if (twl_poll_register(tw_dev, TWL_SCRPD3_REG_ADDR(tw_dev), TWL_CONTROLLER_READY, TWL_CONTROLLER_READY, 60)) { 1328 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x11, "Controller not ready during reset sequence"); 1329 tries++; 1330 continue; 1331 } 1332 } 1333 1334 /* Initconnect */ 1335 if (twl_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS, 1336 TW_EXTENDED_INIT_CONNECT, TW_CURRENT_DRIVER_SRL, 1337 TW_9750_ARCH_ID, TW_CURRENT_DRIVER_BRANCH, 1338 TW_CURRENT_DRIVER_BUILD, &fw_on_ctlr_srl, 1339 &fw_on_ctlr_arch_id, &fw_on_ctlr_branch, 1340 &fw_on_ctlr_build, &init_connect_result)) { 1341 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x12, "Initconnection failed while checking SRL"); 1342 do_soft_reset = 1; 1343 tries++; 1344 continue; 1345 } 1346 1347 /* Load sense buffers */ 1348 while (i < TW_Q_LENGTH) { 1349 writel((u32)((u64)tw_dev->sense_buffer_phys[i] >> 32), TWL_HOBQPH_REG_ADDR(tw_dev)); 1350 writel((u32)tw_dev->sense_buffer_phys[i], TWL_HOBQPL_REG_ADDR(tw_dev)); 1351 1352 /* Check status for over-run after each write */ 1353 status = readl(TWL_STATUS_REG_ADDR(tw_dev)); 1354 if (!(status & TWL_STATUS_OVERRUN_SUBMIT)) 1355 i++; 1356 } 1357 1358 /* Now check status */ 1359 status = readl(TWL_STATUS_REG_ADDR(tw_dev)); 1360 if (status) { 1361 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x13, "Bad controller status after loading sense buffers"); 1362 do_soft_reset = 1; 1363 tries++; 1364 continue; 1365 } 1366 1367 /* Drain the AEN queue */ 1368 if (twl_aen_drain_queue(tw_dev, soft_reset)) { 1369 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x14, "AEN drain failed during reset sequence"); 1370 do_soft_reset = 1; 1371 tries++; 1372 continue; 1373 } 1374 1375 /* Load rest of compatibility struct */ 1376 strncpy(tw_dev->tw_compat_info.driver_version, TW_DRIVER_VERSION, strlen(TW_DRIVER_VERSION)); 1377 tw_dev->tw_compat_info.driver_srl_high = TW_CURRENT_DRIVER_SRL; 1378 tw_dev->tw_compat_info.driver_branch_high = TW_CURRENT_DRIVER_BRANCH; 1379 tw_dev->tw_compat_info.driver_build_high = TW_CURRENT_DRIVER_BUILD; 1380 tw_dev->tw_compat_info.driver_srl_low = TW_BASE_FW_SRL; 1381 tw_dev->tw_compat_info.driver_branch_low = TW_BASE_FW_BRANCH; 1382 tw_dev->tw_compat_info.driver_build_low = TW_BASE_FW_BUILD; 1383 tw_dev->tw_compat_info.fw_on_ctlr_srl = fw_on_ctlr_srl; 1384 tw_dev->tw_compat_info.fw_on_ctlr_branch = fw_on_ctlr_branch; 1385 tw_dev->tw_compat_info.fw_on_ctlr_build = fw_on_ctlr_build; 1386 1387 /* If we got here, controller is in a good state */ 1388 retval = 0; 1389 goto out; 1390 } 1391out: 1392 return retval; 1393} /* End twl_reset_sequence() */ 1394 1395/* This function will reset a device extension */ 1396static int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset) 1397{ 1398 int i = 0, retval = 1; 1399 unsigned long flags = 0; 1400 1401 /* Block SCSI requests while we are resetting */ 1402 if (ioctl_reset) 1403 scsi_block_requests(tw_dev->host); 1404 1405 set_bit(TW_IN_RESET, &tw_dev->flags); 1406 TWL_MASK_INTERRUPTS(tw_dev); 1407 TWL_CLEAR_DB_INTERRUPT(tw_dev); 1408 1409 spin_lock_irqsave(tw_dev->host->host_lock, flags); 1410 1411 /* Abort all requests that are in progress */ 1412 for (i = 0; i < TW_Q_LENGTH; i++) { 1413 if ((tw_dev->state[i] != TW_S_FINISHED) && 1414 (tw_dev->state[i] != TW_S_INITIAL) && 1415 (tw_dev->state[i] != TW_S_COMPLETED)) { 1416 if (tw_dev->srb[i]) { 1417 tw_dev->srb[i]->result = (DID_RESET << 16); 1418 tw_dev->srb[i]->scsi_done(tw_dev->srb[i]); 1419 twl_unmap_scsi_data(tw_dev, i); 1420 } 1421 } 1422 } 1423 1424 /* Reset queues and counts */ 1425 for (i = 0; i < TW_Q_LENGTH; i++) { 1426 tw_dev->free_queue[i] = i; 1427 tw_dev->state[i] = TW_S_INITIAL; 1428 } 1429 tw_dev->free_head = TW_Q_START; 1430 tw_dev->free_tail = TW_Q_START; 1431 tw_dev->posted_request_count = 0; 1432 1433 spin_unlock_irqrestore(tw_dev->host->host_lock, flags); 1434 1435 if (twl_reset_sequence(tw_dev, 1)) 1436 goto out; 1437 1438 TWL_UNMASK_INTERRUPTS(tw_dev); 1439 1440 clear_bit(TW_IN_RESET, &tw_dev->flags); 1441 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; 1442 1443 retval = 0; 1444out: 1445 if (ioctl_reset) 1446 scsi_unblock_requests(tw_dev->host); 1447 return retval; 1448} /* End twl_reset_device_extension() */ 1449 1450/* This funciton returns unit geometry in cylinders/heads/sectors */ 1451static int twl_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[]) 1452{ 1453 int heads, sectors; 1454 TW_Device_Extension *tw_dev; 1455 1456 tw_dev = (TW_Device_Extension *)sdev->host->hostdata; 1457 1458 if (capacity >= 0x200000) { 1459 heads = 255; 1460 sectors = 63; 1461 } else { 1462 heads = 64; 1463 sectors = 32; 1464 } 1465 1466 geom[0] = heads; 1467 geom[1] = sectors; 1468 geom[2] = sector_div(capacity, heads * sectors); /* cylinders */ 1469 1470 return 0; 1471} /* End twl_scsi_biosparam() */ 1472 1473/* This is the new scsi eh reset function */ 1474static int twl_scsi_eh_reset(struct scsi_cmnd *SCpnt) 1475{ 1476 TW_Device_Extension *tw_dev = NULL; 1477 int retval = FAILED; 1478 1479 tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata; 1480 1481 tw_dev->num_resets++; 1482 1483 sdev_printk(KERN_WARNING, SCpnt->device, 1484 "WARNING: (0x%02X:0x%04X): Command (0x%x) timed out, resetting card.\n", 1485 TW_DRIVER, 0x2c, SCpnt->cmnd[0]); 1486 1487 /* Make sure we are not issuing an ioctl or resetting from ioctl */ 1488 mutex_lock(&tw_dev->ioctl_lock); 1489 1490 /* Now reset the card and some of the device extension data */ 1491 if (twl_reset_device_extension(tw_dev, 0)) { 1492 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x15, "Controller reset failed during scsi host reset"); 1493 goto out; 1494 } 1495 1496 retval = SUCCESS; 1497out: 1498 mutex_unlock(&tw_dev->ioctl_lock); 1499 return retval; 1500} /* End twl_scsi_eh_reset() */ 1501 1502/* This is the main scsi queue function to handle scsi opcodes */ 1503static int twl_scsi_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *)) 1504{ 1505 int request_id, retval; 1506 TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata; 1507 1508 /* If we are resetting due to timed out ioctl, report as busy */ 1509 if (test_bit(TW_IN_RESET, &tw_dev->flags)) { 1510 retval = SCSI_MLQUEUE_HOST_BUSY; 1511 goto out; 1512 } 1513 1514 /* Save done function into scsi_cmnd struct */ 1515 SCpnt->scsi_done = done; 1516 1517 /* Get a free request id */ 1518 twl_get_request_id(tw_dev, &request_id); 1519 1520 /* Save the scsi command for use by the ISR */ 1521 tw_dev->srb[request_id] = SCpnt; 1522 1523 /* Initialize phase to zero */ 1524 SCpnt->SCp.phase = TW_PHASE_INITIAL; 1525 1526 retval = twl_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL); 1527 if (retval) { 1528 tw_dev->state[request_id] = TW_S_COMPLETED; 1529 twl_free_request_id(tw_dev, request_id); 1530 SCpnt->result = (DID_ERROR << 16); 1531 done(SCpnt); 1532 retval = 0; 1533 } 1534out: 1535 return retval; 1536} /* End twl_scsi_queue() */ 1537 1538/* This function tells the controller to shut down */ 1539static void __twl_shutdown(TW_Device_Extension *tw_dev) 1540{ 1541 /* Disable interrupts */ 1542 TWL_MASK_INTERRUPTS(tw_dev); 1543 1544 /* Free up the IRQ */ 1545 free_irq(tw_dev->tw_pci_dev->irq, tw_dev); 1546 1547 printk(KERN_WARNING "3w-sas: Shutting down host %d.\n", tw_dev->host->host_no); 1548 1549 /* Tell the card we are shutting down */ 1550 if (twl_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) { 1551 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x16, "Connection shutdown failed"); 1552 } else { 1553 printk(KERN_WARNING "3w-sas: Shutdown complete.\n"); 1554 } 1555 1556 /* Clear doorbell interrupt just before exit */ 1557 TWL_CLEAR_DB_INTERRUPT(tw_dev); 1558} /* End __twl_shutdown() */ 1559 1560/* Wrapper for __twl_shutdown */ 1561static void twl_shutdown(struct pci_dev *pdev) 1562{ 1563 struct Scsi_Host *host = pci_get_drvdata(pdev); 1564 TW_Device_Extension *tw_dev; 1565 1566 if (!host) 1567 return; 1568 1569 tw_dev = (TW_Device_Extension *)host->hostdata; 1570 1571 if (tw_dev->online) 1572 __twl_shutdown(tw_dev); 1573} /* End twl_shutdown() */ 1574 1575/* This function configures unit settings when a unit is coming on-line */ 1576static int twl_slave_configure(struct scsi_device *sdev) 1577{ 1578 /* Force 60 second timeout */ 1579 blk_queue_rq_timeout(sdev->request_queue, 60 * HZ); 1580 1581 return 0; 1582} /* End twl_slave_configure() */ 1583 1584/* scsi_host_template initializer */ 1585static struct scsi_host_template driver_template = { 1586 .module = THIS_MODULE, 1587 .name = "3w-sas", 1588 .queuecommand = twl_scsi_queue, 1589 .eh_host_reset_handler = twl_scsi_eh_reset, 1590 .bios_param = twl_scsi_biosparam, 1591 .change_queue_depth = twl_change_queue_depth, 1592 .can_queue = TW_Q_LENGTH-2, 1593 .slave_configure = twl_slave_configure, 1594 .this_id = -1, 1595 .sg_tablesize = TW_LIBERATOR_MAX_SGL_LENGTH, 1596 .max_sectors = TW_MAX_SECTORS, 1597 .cmd_per_lun = TW_MAX_CMDS_PER_LUN, 1598 .use_clustering = ENABLE_CLUSTERING, 1599 .shost_attrs = twl_host_attrs, 1600 .emulated = 1 1601}; 1602 1603/* This function will probe and initialize a card */ 1604static int __devinit twl_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id) 1605{ 1606 struct Scsi_Host *host = NULL; 1607 TW_Device_Extension *tw_dev; 1608 int retval = -ENODEV; 1609 int *ptr_phycount, phycount=0; 1610 1611 retval = pci_enable_device(pdev); 1612 if (retval) { 1613 TW_PRINTK(host, TW_DRIVER, 0x17, "Failed to enable pci device"); 1614 goto out_disable_device; 1615 } 1616 1617 pci_set_master(pdev); 1618 pci_try_set_mwi(pdev); 1619 1620 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) 1621 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) 1622 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) 1623 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) { 1624 TW_PRINTK(host, TW_DRIVER, 0x18, "Failed to set dma mask"); 1625 retval = -ENODEV; 1626 goto out_disable_device; 1627 } 1628 1629 host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension)); 1630 if (!host) { 1631 TW_PRINTK(host, TW_DRIVER, 0x19, "Failed to allocate memory for device extension"); 1632 retval = -ENOMEM; 1633 goto out_disable_device; 1634 } 1635 tw_dev = shost_priv(host); 1636 1637 /* Save values to device extension */ 1638 tw_dev->host = host; 1639 tw_dev->tw_pci_dev = pdev; 1640 1641 if (twl_initialize_device_extension(tw_dev)) { 1642 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Failed to initialize device extension"); 1643 goto out_free_device_extension; 1644 } 1645 1646 /* Request IO regions */ 1647 retval = pci_request_regions(pdev, "3w-sas"); 1648 if (retval) { 1649 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Failed to get mem region"); 1650 goto out_free_device_extension; 1651 } 1652 1653 /* Save base address, use region 1 */ 1654 tw_dev->base_addr = pci_iomap(pdev, 1, 0); 1655 if (!tw_dev->base_addr) { 1656 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to ioremap"); 1657 goto out_release_mem_region; 1658 } 1659 1660 /* Disable interrupts on the card */ 1661 TWL_MASK_INTERRUPTS(tw_dev); 1662 1663 /* Initialize the card */ 1664 if (twl_reset_sequence(tw_dev, 0)) { 1665 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1d, "Controller reset failed during probe"); 1666 goto out_iounmap; 1667 } 1668 1669 /* Set host specific parameters */ 1670 host->max_id = TW_MAX_UNITS; 1671 host->max_cmd_len = TW_MAX_CDB_LEN; 1672 host->max_lun = TW_MAX_LUNS; 1673 host->max_channel = 0; 1674 1675 /* Register the card with the kernel SCSI layer */ 1676 retval = scsi_add_host(host, &pdev->dev); 1677 if (retval) { 1678 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1e, "scsi add host failed"); 1679 goto out_iounmap; 1680 } 1681 1682 pci_set_drvdata(pdev, host); 1683 1684 printk(KERN_WARNING "3w-sas: scsi%d: Found an LSI 3ware %s Controller at 0x%llx, IRQ: %d.\n", 1685 host->host_no, 1686 (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE, 1687 TW_PARAM_MODEL, TW_PARAM_MODEL_LENGTH), 1688 (u64)pci_resource_start(pdev, 1), pdev->irq); 1689 1690 ptr_phycount = twl_get_param(tw_dev, 2, TW_PARAM_PHY_SUMMARY_TABLE, 1691 TW_PARAM_PHYCOUNT, TW_PARAM_PHYCOUNT_LENGTH); 1692 if (ptr_phycount) 1693 phycount = le32_to_cpu(*(int *)ptr_phycount); 1694 1695 printk(KERN_WARNING "3w-sas: scsi%d: Firmware %s, BIOS %s, Phys: %d.\n", 1696 host->host_no, 1697 (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE, 1698 TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH), 1699 (char *)twl_get_param(tw_dev, 2, TW_VERSION_TABLE, 1700 TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH), 1701 phycount); 1702 1703 /* Try to enable MSI */ 1704 if (use_msi && !pci_enable_msi(pdev)) 1705 set_bit(TW_USING_MSI, &tw_dev->flags); 1706 1707 /* Now setup the interrupt handler */ 1708 retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas", tw_dev); 1709 if (retval) { 1710 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Error requesting IRQ"); 1711 goto out_remove_host; 1712 } 1713 1714 twl_device_extension_list[twl_device_extension_count] = tw_dev; 1715 twl_device_extension_count++; 1716 1717 /* Re-enable interrupts on the card */ 1718 TWL_UNMASK_INTERRUPTS(tw_dev); 1719 1720 /* Finally, scan the host */ 1721 scsi_scan_host(host); 1722 1723 /* Add sysfs binary files */ 1724 if (sysfs_create_bin_file(&host->shost_dev.kobj, &twl_sysfs_aen_read_attr)) 1725 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x20, "Failed to create sysfs binary file: 3ware_aen_read"); 1726 if (sysfs_create_bin_file(&host->shost_dev.kobj, &twl_sysfs_compat_info_attr)) 1727 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x21, "Failed to create sysfs binary file: 3ware_compat_info"); 1728 1729 if (twl_major == -1) { 1730 if ((twl_major = register_chrdev (0, "twl", &twl_fops)) < 0) 1731 TW_PRINTK(host, TW_DRIVER, 0x22, "Failed to register character device"); 1732 } 1733 tw_dev->online = 1; 1734 return 0; 1735 1736out_remove_host: 1737 if (test_bit(TW_USING_MSI, &tw_dev->flags)) 1738 pci_disable_msi(pdev); 1739 scsi_remove_host(host); 1740out_iounmap: 1741 iounmap(tw_dev->base_addr); 1742out_release_mem_region: 1743 pci_release_regions(pdev); 1744out_free_device_extension: 1745 twl_free_device_extension(tw_dev); 1746 scsi_host_put(host); 1747out_disable_device: 1748 pci_disable_device(pdev); 1749 1750 return retval; 1751} /* End twl_probe() */ 1752 1753/* This function is called to remove a device */ 1754static void twl_remove(struct pci_dev *pdev) 1755{ 1756 struct Scsi_Host *host = pci_get_drvdata(pdev); 1757 TW_Device_Extension *tw_dev; 1758 1759 if (!host) 1760 return; 1761 1762 tw_dev = (TW_Device_Extension *)host->hostdata; 1763 1764 if (!tw_dev->online) 1765 return; 1766 1767 /* Remove sysfs binary files */ 1768 sysfs_remove_bin_file(&host->shost_dev.kobj, &twl_sysfs_aen_read_attr); 1769 sysfs_remove_bin_file(&host->shost_dev.kobj, &twl_sysfs_compat_info_attr); 1770 1771 scsi_remove_host(tw_dev->host); 1772 1773 /* Unregister character device */ 1774 if (twl_major >= 0) { 1775 unregister_chrdev(twl_major, "twl"); 1776 twl_major = -1; 1777 } 1778 1779 /* Shutdown the card */ 1780 __twl_shutdown(tw_dev); 1781 1782 /* Disable MSI if enabled */ 1783 if (test_bit(TW_USING_MSI, &tw_dev->flags)) 1784 pci_disable_msi(pdev); 1785 1786 /* Free IO remapping */ 1787 iounmap(tw_dev->base_addr); 1788 1789 /* Free up the mem region */ 1790 pci_release_regions(pdev); 1791 1792 /* Free up device extension resources */ 1793 twl_free_device_extension(tw_dev); 1794 1795 scsi_host_put(tw_dev->host); 1796 pci_disable_device(pdev); 1797 twl_device_extension_count--; 1798} /* End twl_remove() */ 1799 1800#ifdef CONFIG_PM 1801/* This function is called on PCI suspend */ 1802static int twl_suspend(struct pci_dev *pdev, pm_message_t state) 1803{ 1804 struct Scsi_Host *host = pci_get_drvdata(pdev); 1805 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; 1806 1807 printk(KERN_WARNING "3w-sas: Suspending host %d.\n", tw_dev->host->host_no); 1808 /* Disable interrupts */ 1809 TWL_MASK_INTERRUPTS(tw_dev); 1810 1811 free_irq(tw_dev->tw_pci_dev->irq, tw_dev); 1812 1813 /* Tell the card we are shutting down */ 1814 if (twl_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) { 1815 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x23, "Connection shutdown failed during suspend"); 1816 } else { 1817 printk(KERN_WARNING "3w-sas: Suspend complete.\n"); 1818 } 1819 1820 /* Clear doorbell interrupt */ 1821 TWL_CLEAR_DB_INTERRUPT(tw_dev); 1822 1823 pci_save_state(pdev); 1824 pci_disable_device(pdev); 1825 pci_set_power_state(pdev, pci_choose_state(pdev, state)); 1826 1827 return 0; 1828} /* End twl_suspend() */ 1829 1830/* This function is called on PCI resume */ 1831static int twl_resume(struct pci_dev *pdev) 1832{ 1833 int retval = 0; 1834 struct Scsi_Host *host = pci_get_drvdata(pdev); 1835 TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; 1836 1837 printk(KERN_WARNING "3w-sas: Resuming host %d.\n", tw_dev->host->host_no); 1838 pci_set_power_state(pdev, PCI_D0); 1839 pci_enable_wake(pdev, PCI_D0, 0); 1840 pci_restore_state(pdev); 1841 1842 retval = pci_enable_device(pdev); 1843 if (retval) { 1844 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x24, "Enable device failed during resume"); 1845 return retval; 1846 } 1847 1848 pci_set_master(pdev); 1849 pci_try_set_mwi(pdev); 1850 1851 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) 1852 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) 1853 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) 1854 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) { 1855 TW_PRINTK(host, TW_DRIVER, 0x25, "Failed to set dma mask during resume"); 1856 retval = -ENODEV; 1857 goto out_disable_device; 1858 } 1859 1860 /* Initialize the card */ 1861 if (twl_reset_sequence(tw_dev, 0)) { 1862 retval = -ENODEV; 1863 goto out_disable_device; 1864 } 1865 1866 /* Now setup the interrupt handler */ 1867 retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas", tw_dev); 1868 if (retval) { 1869 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x26, "Error requesting IRQ during resume"); 1870 retval = -ENODEV; 1871 goto out_disable_device; 1872 } 1873 1874 /* Now enable MSI if enabled */ 1875 if (test_bit(TW_USING_MSI, &tw_dev->flags)) 1876 pci_enable_msi(pdev); 1877 1878 /* Re-enable interrupts on the card */ 1879 TWL_UNMASK_INTERRUPTS(tw_dev); 1880 1881 printk(KERN_WARNING "3w-sas: Resume complete.\n"); 1882 return 0; 1883 1884out_disable_device: 1885 scsi_remove_host(host); 1886 pci_disable_device(pdev); 1887 1888 return retval; 1889} /* End twl_resume() */ 1890#endif 1891 1892/* PCI Devices supported by this driver */ 1893static struct pci_device_id twl_pci_tbl[] __devinitdata = { 1894 { PCI_VDEVICE(3WARE, PCI_DEVICE_ID_3WARE_9750) }, 1895 { } 1896}; 1897MODULE_DEVICE_TABLE(pci, twl_pci_tbl); 1898 1899/* pci_driver initializer */ 1900static struct pci_driver twl_driver = { 1901 .name = "3w-sas", 1902 .id_table = twl_pci_tbl, 1903 .probe = twl_probe, 1904 .remove = twl_remove, 1905#ifdef CONFIG_PM 1906 .suspend = twl_suspend, 1907 .resume = twl_resume, 1908#endif 1909 .shutdown = twl_shutdown 1910}; 1911 1912/* This function is called on driver initialization */ 1913static int __init twl_init(void) 1914{ 1915 printk(KERN_INFO "LSI 3ware SAS/SATA-RAID Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION); 1916 1917 return pci_register_driver(&twl_driver); 1918} /* End twl_init() */ 1919 1920/* This function is called on driver exit */ 1921static void __exit twl_exit(void) 1922{ 1923 pci_unregister_driver(&twl_driver); 1924} /* End twl_exit() */ 1925 1926module_init(twl_init); 1927module_exit(twl_exit); 1928 1929