sas_expander.c revision 354cf82980e2449e71fdaa3c6f170357ebd65467
1/* 2 * Serial Attached SCSI (SAS) Expander discovery and configuration 3 * 4 * Copyright (C) 2005 Adaptec, Inc. All rights reserved. 5 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> 6 * 7 * This file is licensed under GPLv2. 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License as 11 * published by the Free Software Foundation; either version 2 of the 12 * License, or (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, but 15 * WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 22 * 23 */ 24 25#include <linux/scatterlist.h> 26#include <linux/blkdev.h> 27#include <linux/slab.h> 28 29#include "sas_internal.h" 30 31#include <scsi/sas_ata.h> 32#include <scsi/scsi_transport.h> 33#include <scsi/scsi_transport_sas.h> 34#include "../scsi_sas_internal.h" 35 36static int sas_discover_expander(struct domain_device *dev); 37static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr); 38static int sas_configure_phy(struct domain_device *dev, int phy_id, 39 u8 *sas_addr, int include); 40static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr); 41 42/* ---------- SMP task management ---------- */ 43 44static void smp_task_timedout(unsigned long _task) 45{ 46 struct sas_task *task = (void *) _task; 47 unsigned long flags; 48 49 spin_lock_irqsave(&task->task_state_lock, flags); 50 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) 51 task->task_state_flags |= SAS_TASK_STATE_ABORTED; 52 spin_unlock_irqrestore(&task->task_state_lock, flags); 53 54 complete(&task->completion); 55} 56 57static void smp_task_done(struct sas_task *task) 58{ 59 if (!del_timer(&task->timer)) 60 return; 61 complete(&task->completion); 62} 63 64/* Give it some long enough timeout. In seconds. */ 65#define SMP_TIMEOUT 10 66 67static int smp_execute_task(struct domain_device *dev, void *req, int req_size, 68 void *resp, int resp_size) 69{ 70 int res, retry; 71 struct sas_task *task = NULL; 72 struct sas_internal *i = 73 to_sas_internal(dev->port->ha->core.shost->transportt); 74 75 mutex_lock(&dev->ex_dev.cmd_mutex); 76 for (retry = 0; retry < 3; retry++) { 77 if (test_bit(SAS_DEV_GONE, &dev->state)) { 78 res = -ECOMM; 79 break; 80 } 81 82 task = sas_alloc_task(GFP_KERNEL); 83 if (!task) { 84 res = -ENOMEM; 85 break; 86 } 87 task->dev = dev; 88 task->task_proto = dev->tproto; 89 sg_init_one(&task->smp_task.smp_req, req, req_size); 90 sg_init_one(&task->smp_task.smp_resp, resp, resp_size); 91 92 task->task_done = smp_task_done; 93 94 task->timer.data = (unsigned long) task; 95 task->timer.function = smp_task_timedout; 96 task->timer.expires = jiffies + SMP_TIMEOUT*HZ; 97 add_timer(&task->timer); 98 99 res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); 100 101 if (res) { 102 del_timer(&task->timer); 103 SAS_DPRINTK("executing SMP task failed:%d\n", res); 104 break; 105 } 106 107 wait_for_completion(&task->completion); 108 res = -ECOMM; 109 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { 110 SAS_DPRINTK("smp task timed out or aborted\n"); 111 i->dft->lldd_abort_task(task); 112 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { 113 SAS_DPRINTK("SMP task aborted and not done\n"); 114 break; 115 } 116 } 117 if (task->task_status.resp == SAS_TASK_COMPLETE && 118 task->task_status.stat == SAM_STAT_GOOD) { 119 res = 0; 120 break; 121 } 122 if (task->task_status.resp == SAS_TASK_COMPLETE && 123 task->task_status.stat == SAS_DATA_UNDERRUN) { 124 /* no error, but return the number of bytes of 125 * underrun */ 126 res = task->task_status.residual; 127 break; 128 } 129 if (task->task_status.resp == SAS_TASK_COMPLETE && 130 task->task_status.stat == SAS_DATA_OVERRUN) { 131 res = -EMSGSIZE; 132 break; 133 } 134 if (task->task_status.resp == SAS_TASK_UNDELIVERED && 135 task->task_status.stat == SAS_DEVICE_UNKNOWN) 136 break; 137 else { 138 SAS_DPRINTK("%s: task to dev %016llx response: 0x%x " 139 "status 0x%x\n", __func__, 140 SAS_ADDR(dev->sas_addr), 141 task->task_status.resp, 142 task->task_status.stat); 143 sas_free_task(task); 144 task = NULL; 145 } 146 } 147 mutex_unlock(&dev->ex_dev.cmd_mutex); 148 149 BUG_ON(retry == 3 && task != NULL); 150 sas_free_task(task); 151 return res; 152} 153 154/* ---------- Allocations ---------- */ 155 156static inline void *alloc_smp_req(int size) 157{ 158 u8 *p = kzalloc(size, GFP_KERNEL); 159 if (p) 160 p[0] = SMP_REQUEST; 161 return p; 162} 163 164static inline void *alloc_smp_resp(int size) 165{ 166 return kzalloc(size, GFP_KERNEL); 167} 168 169static char sas_route_char(struct domain_device *dev, struct ex_phy *phy) 170{ 171 switch (phy->routing_attr) { 172 case TABLE_ROUTING: 173 if (dev->ex_dev.t2t_supp) 174 return 'U'; 175 else 176 return 'T'; 177 case DIRECT_ROUTING: 178 return 'D'; 179 case SUBTRACTIVE_ROUTING: 180 return 'S'; 181 default: 182 return '?'; 183 } 184} 185 186static enum sas_dev_type to_dev_type(struct discover_resp *dr) 187{ 188 /* This is detecting a failure to transmit initial dev to host 189 * FIS as described in section J.5 of sas-2 r16 190 */ 191 if (dr->attached_dev_type == NO_DEVICE && dr->attached_sata_dev && 192 dr->linkrate >= SAS_LINK_RATE_1_5_GBPS) 193 return SATA_PENDING; 194 else 195 return dr->attached_dev_type; 196} 197 198static void sas_set_ex_phy(struct domain_device *dev, int phy_id, void *rsp) 199{ 200 enum sas_dev_type dev_type; 201 enum sas_linkrate linkrate; 202 u8 sas_addr[SAS_ADDR_SIZE]; 203 struct smp_resp *resp = rsp; 204 struct discover_resp *dr = &resp->disc; 205 struct expander_device *ex = &dev->ex_dev; 206 struct ex_phy *phy = &ex->ex_phy[phy_id]; 207 struct sas_rphy *rphy = dev->rphy; 208 bool new_phy = !phy->phy; 209 char *type; 210 211 if (new_phy) { 212 phy->phy = sas_phy_alloc(&rphy->dev, phy_id); 213 214 /* FIXME: error_handling */ 215 BUG_ON(!phy->phy); 216 } 217 218 switch (resp->result) { 219 case SMP_RESP_PHY_VACANT: 220 phy->phy_state = PHY_VACANT; 221 break; 222 default: 223 phy->phy_state = PHY_NOT_PRESENT; 224 break; 225 case SMP_RESP_FUNC_ACC: 226 phy->phy_state = PHY_EMPTY; /* do not know yet */ 227 break; 228 } 229 230 /* check if anything important changed to squelch debug */ 231 dev_type = phy->attached_dev_type; 232 linkrate = phy->linkrate; 233 memcpy(sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); 234 235 phy->attached_dev_type = to_dev_type(dr); 236 phy->phy_id = phy_id; 237 phy->linkrate = dr->linkrate; 238 phy->attached_sata_host = dr->attached_sata_host; 239 phy->attached_sata_dev = dr->attached_sata_dev; 240 phy->attached_sata_ps = dr->attached_sata_ps; 241 phy->attached_iproto = dr->iproto << 1; 242 phy->attached_tproto = dr->tproto << 1; 243 memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE); 244 phy->attached_phy_id = dr->attached_phy_id; 245 phy->phy_change_count = dr->change_count; 246 phy->routing_attr = dr->routing_attr; 247 phy->virtual = dr->virtual; 248 phy->last_da_index = -1; 249 250 phy->phy->identify.sas_address = SAS_ADDR(phy->attached_sas_addr); 251 phy->phy->identify.device_type = dr->attached_dev_type; 252 phy->phy->identify.initiator_port_protocols = phy->attached_iproto; 253 phy->phy->identify.target_port_protocols = phy->attached_tproto; 254 phy->phy->identify.phy_identifier = phy_id; 255 phy->phy->minimum_linkrate_hw = dr->hmin_linkrate; 256 phy->phy->maximum_linkrate_hw = dr->hmax_linkrate; 257 phy->phy->minimum_linkrate = dr->pmin_linkrate; 258 phy->phy->maximum_linkrate = dr->pmax_linkrate; 259 phy->phy->negotiated_linkrate = phy->linkrate; 260 261 if (new_phy) 262 if (sas_phy_add(phy->phy)) { 263 sas_phy_free(phy->phy); 264 return; 265 } 266 267 switch (phy->attached_dev_type) { 268 case SATA_PENDING: 269 type = "stp pending"; 270 break; 271 case NO_DEVICE: 272 type = "no device"; 273 break; 274 case SAS_END_DEV: 275 if (phy->attached_iproto) { 276 if (phy->attached_tproto) 277 type = "host+target"; 278 else 279 type = "host"; 280 } else { 281 if (dr->attached_sata_dev) 282 type = "stp"; 283 else 284 type = "ssp"; 285 } 286 break; 287 case EDGE_DEV: 288 case FANOUT_DEV: 289 type = "smp"; 290 break; 291 default: 292 type = "unknown"; 293 } 294 295 /* this routine is polled by libata error recovery so filter 296 * unimportant messages 297 */ 298 if (new_phy || phy->attached_dev_type != dev_type || 299 phy->linkrate != linkrate || 300 SAS_ADDR(phy->attached_sas_addr) != SAS_ADDR(sas_addr)) 301 /* pass */; 302 else 303 return; 304 305 SAS_DPRINTK("ex %016llx phy%02d:%c:%X attached: %016llx (%s)\n", 306 SAS_ADDR(dev->sas_addr), phy->phy_id, 307 sas_route_char(dev, phy), phy->linkrate, 308 SAS_ADDR(phy->attached_sas_addr), type); 309} 310 311/* check if we have an existing attached ata device on this expander phy */ 312struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id) 313{ 314 struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy_id]; 315 struct domain_device *dev; 316 struct sas_rphy *rphy; 317 318 if (!ex_phy->port) 319 return NULL; 320 321 rphy = ex_phy->port->rphy; 322 if (!rphy) 323 return NULL; 324 325 dev = sas_find_dev_by_rphy(rphy); 326 327 if (dev && dev_is_sata(dev)) 328 return dev; 329 330 return NULL; 331} 332 333#define DISCOVER_REQ_SIZE 16 334#define DISCOVER_RESP_SIZE 56 335 336static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req, 337 u8 *disc_resp, int single) 338{ 339 struct discover_resp *dr; 340 int res; 341 342 disc_req[9] = single; 343 344 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, 345 disc_resp, DISCOVER_RESP_SIZE); 346 if (res) 347 return res; 348 dr = &((struct smp_resp *)disc_resp)->disc; 349 if (memcmp(dev->sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE) == 0) { 350 sas_printk("Found loopback topology, just ignore it!\n"); 351 return 0; 352 } 353 sas_set_ex_phy(dev, single, disc_resp); 354 return 0; 355} 356 357int sas_ex_phy_discover(struct domain_device *dev, int single) 358{ 359 struct expander_device *ex = &dev->ex_dev; 360 int res = 0; 361 u8 *disc_req; 362 u8 *disc_resp; 363 364 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); 365 if (!disc_req) 366 return -ENOMEM; 367 368 disc_resp = alloc_smp_req(DISCOVER_RESP_SIZE); 369 if (!disc_resp) { 370 kfree(disc_req); 371 return -ENOMEM; 372 } 373 374 disc_req[1] = SMP_DISCOVER; 375 376 if (0 <= single && single < ex->num_phys) { 377 res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single); 378 } else { 379 int i; 380 381 for (i = 0; i < ex->num_phys; i++) { 382 res = sas_ex_phy_discover_helper(dev, disc_req, 383 disc_resp, i); 384 if (res) 385 goto out_err; 386 } 387 } 388out_err: 389 kfree(disc_resp); 390 kfree(disc_req); 391 return res; 392} 393 394static int sas_expander_discover(struct domain_device *dev) 395{ 396 struct expander_device *ex = &dev->ex_dev; 397 int res = -ENOMEM; 398 399 ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL); 400 if (!ex->ex_phy) 401 return -ENOMEM; 402 403 res = sas_ex_phy_discover(dev, -1); 404 if (res) 405 goto out_err; 406 407 return 0; 408 out_err: 409 kfree(ex->ex_phy); 410 ex->ex_phy = NULL; 411 return res; 412} 413 414#define MAX_EXPANDER_PHYS 128 415 416static void ex_assign_report_general(struct domain_device *dev, 417 struct smp_resp *resp) 418{ 419 struct report_general_resp *rg = &resp->rg; 420 421 dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count); 422 dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes); 423 dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS); 424 dev->ex_dev.t2t_supp = rg->t2t_supp; 425 dev->ex_dev.conf_route_table = rg->conf_route_table; 426 dev->ex_dev.configuring = rg->configuring; 427 memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8); 428} 429 430#define RG_REQ_SIZE 8 431#define RG_RESP_SIZE 32 432 433static int sas_ex_general(struct domain_device *dev) 434{ 435 u8 *rg_req; 436 struct smp_resp *rg_resp; 437 int res; 438 int i; 439 440 rg_req = alloc_smp_req(RG_REQ_SIZE); 441 if (!rg_req) 442 return -ENOMEM; 443 444 rg_resp = alloc_smp_resp(RG_RESP_SIZE); 445 if (!rg_resp) { 446 kfree(rg_req); 447 return -ENOMEM; 448 } 449 450 rg_req[1] = SMP_REPORT_GENERAL; 451 452 for (i = 0; i < 5; i++) { 453 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, 454 RG_RESP_SIZE); 455 456 if (res) { 457 SAS_DPRINTK("RG to ex %016llx failed:0x%x\n", 458 SAS_ADDR(dev->sas_addr), res); 459 goto out; 460 } else if (rg_resp->result != SMP_RESP_FUNC_ACC) { 461 SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n", 462 SAS_ADDR(dev->sas_addr), rg_resp->result); 463 res = rg_resp->result; 464 goto out; 465 } 466 467 ex_assign_report_general(dev, rg_resp); 468 469 if (dev->ex_dev.configuring) { 470 SAS_DPRINTK("RG: ex %llx self-configuring...\n", 471 SAS_ADDR(dev->sas_addr)); 472 schedule_timeout_interruptible(5*HZ); 473 } else 474 break; 475 } 476out: 477 kfree(rg_req); 478 kfree(rg_resp); 479 return res; 480} 481 482static void ex_assign_manuf_info(struct domain_device *dev, void 483 *_mi_resp) 484{ 485 u8 *mi_resp = _mi_resp; 486 struct sas_rphy *rphy = dev->rphy; 487 struct sas_expander_device *edev = rphy_to_expander_device(rphy); 488 489 memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN); 490 memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN); 491 memcpy(edev->product_rev, mi_resp + 36, 492 SAS_EXPANDER_PRODUCT_REV_LEN); 493 494 if (mi_resp[8] & 1) { 495 memcpy(edev->component_vendor_id, mi_resp + 40, 496 SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN); 497 edev->component_id = mi_resp[48] << 8 | mi_resp[49]; 498 edev->component_revision_id = mi_resp[50]; 499 } 500} 501 502#define MI_REQ_SIZE 8 503#define MI_RESP_SIZE 64 504 505static int sas_ex_manuf_info(struct domain_device *dev) 506{ 507 u8 *mi_req; 508 u8 *mi_resp; 509 int res; 510 511 mi_req = alloc_smp_req(MI_REQ_SIZE); 512 if (!mi_req) 513 return -ENOMEM; 514 515 mi_resp = alloc_smp_resp(MI_RESP_SIZE); 516 if (!mi_resp) { 517 kfree(mi_req); 518 return -ENOMEM; 519 } 520 521 mi_req[1] = SMP_REPORT_MANUF_INFO; 522 523 res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE); 524 if (res) { 525 SAS_DPRINTK("MI: ex %016llx failed:0x%x\n", 526 SAS_ADDR(dev->sas_addr), res); 527 goto out; 528 } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) { 529 SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n", 530 SAS_ADDR(dev->sas_addr), mi_resp[2]); 531 goto out; 532 } 533 534 ex_assign_manuf_info(dev, mi_resp); 535out: 536 kfree(mi_req); 537 kfree(mi_resp); 538 return res; 539} 540 541#define PC_REQ_SIZE 44 542#define PC_RESP_SIZE 8 543 544int sas_smp_phy_control(struct domain_device *dev, int phy_id, 545 enum phy_func phy_func, 546 struct sas_phy_linkrates *rates) 547{ 548 u8 *pc_req; 549 u8 *pc_resp; 550 int res; 551 552 pc_req = alloc_smp_req(PC_REQ_SIZE); 553 if (!pc_req) 554 return -ENOMEM; 555 556 pc_resp = alloc_smp_resp(PC_RESP_SIZE); 557 if (!pc_resp) { 558 kfree(pc_req); 559 return -ENOMEM; 560 } 561 562 pc_req[1] = SMP_PHY_CONTROL; 563 pc_req[9] = phy_id; 564 pc_req[10]= phy_func; 565 if (rates) { 566 pc_req[32] = rates->minimum_linkrate << 4; 567 pc_req[33] = rates->maximum_linkrate << 4; 568 } 569 570 res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE); 571 572 kfree(pc_resp); 573 kfree(pc_req); 574 return res; 575} 576 577static void sas_ex_disable_phy(struct domain_device *dev, int phy_id) 578{ 579 struct expander_device *ex = &dev->ex_dev; 580 struct ex_phy *phy = &ex->ex_phy[phy_id]; 581 582 sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL); 583 phy->linkrate = SAS_PHY_DISABLED; 584} 585 586static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr) 587{ 588 struct expander_device *ex = &dev->ex_dev; 589 int i; 590 591 for (i = 0; i < ex->num_phys; i++) { 592 struct ex_phy *phy = &ex->ex_phy[i]; 593 594 if (phy->phy_state == PHY_VACANT || 595 phy->phy_state == PHY_NOT_PRESENT) 596 continue; 597 598 if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr)) 599 sas_ex_disable_phy(dev, i); 600 } 601} 602 603static int sas_dev_present_in_domain(struct asd_sas_port *port, 604 u8 *sas_addr) 605{ 606 struct domain_device *dev; 607 608 if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr)) 609 return 1; 610 list_for_each_entry(dev, &port->dev_list, dev_list_node) { 611 if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr)) 612 return 1; 613 } 614 return 0; 615} 616 617#define RPEL_REQ_SIZE 16 618#define RPEL_RESP_SIZE 32 619int sas_smp_get_phy_events(struct sas_phy *phy) 620{ 621 int res; 622 u8 *req; 623 u8 *resp; 624 struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); 625 struct domain_device *dev = sas_find_dev_by_rphy(rphy); 626 627 req = alloc_smp_req(RPEL_REQ_SIZE); 628 if (!req) 629 return -ENOMEM; 630 631 resp = alloc_smp_resp(RPEL_RESP_SIZE); 632 if (!resp) { 633 kfree(req); 634 return -ENOMEM; 635 } 636 637 req[1] = SMP_REPORT_PHY_ERR_LOG; 638 req[9] = phy->number; 639 640 res = smp_execute_task(dev, req, RPEL_REQ_SIZE, 641 resp, RPEL_RESP_SIZE); 642 643 if (!res) 644 goto out; 645 646 phy->invalid_dword_count = scsi_to_u32(&resp[12]); 647 phy->running_disparity_error_count = scsi_to_u32(&resp[16]); 648 phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]); 649 phy->phy_reset_problem_count = scsi_to_u32(&resp[24]); 650 651 out: 652 kfree(resp); 653 return res; 654 655} 656 657#ifdef CONFIG_SCSI_SAS_ATA 658 659#define RPS_REQ_SIZE 16 660#define RPS_RESP_SIZE 60 661 662int sas_get_report_phy_sata(struct domain_device *dev, int phy_id, 663 struct smp_resp *rps_resp) 664{ 665 int res; 666 u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE); 667 u8 *resp = (u8 *)rps_resp; 668 669 if (!rps_req) 670 return -ENOMEM; 671 672 rps_req[1] = SMP_REPORT_PHY_SATA; 673 rps_req[9] = phy_id; 674 675 res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE, 676 rps_resp, RPS_RESP_SIZE); 677 678 /* 0x34 is the FIS type for the D2H fis. There's a potential 679 * standards cockup here. sas-2 explicitly specifies the FIS 680 * should be encoded so that FIS type is in resp[24]. 681 * However, some expanders endian reverse this. Undo the 682 * reversal here */ 683 if (!res && resp[27] == 0x34 && resp[24] != 0x34) { 684 int i; 685 686 for (i = 0; i < 5; i++) { 687 int j = 24 + (i*4); 688 u8 a, b; 689 a = resp[j + 0]; 690 b = resp[j + 1]; 691 resp[j + 0] = resp[j + 3]; 692 resp[j + 1] = resp[j + 2]; 693 resp[j + 2] = b; 694 resp[j + 3] = a; 695 } 696 } 697 698 kfree(rps_req); 699 return res; 700} 701#endif 702 703static void sas_ex_get_linkrate(struct domain_device *parent, 704 struct domain_device *child, 705 struct ex_phy *parent_phy) 706{ 707 struct expander_device *parent_ex = &parent->ex_dev; 708 struct sas_port *port; 709 int i; 710 711 child->pathways = 0; 712 713 port = parent_phy->port; 714 715 for (i = 0; i < parent_ex->num_phys; i++) { 716 struct ex_phy *phy = &parent_ex->ex_phy[i]; 717 718 if (phy->phy_state == PHY_VACANT || 719 phy->phy_state == PHY_NOT_PRESENT) 720 continue; 721 722 if (SAS_ADDR(phy->attached_sas_addr) == 723 SAS_ADDR(child->sas_addr)) { 724 725 child->min_linkrate = min(parent->min_linkrate, 726 phy->linkrate); 727 child->max_linkrate = max(parent->max_linkrate, 728 phy->linkrate); 729 child->pathways++; 730 sas_port_add_phy(port, phy->phy); 731 } 732 } 733 child->linkrate = min(parent_phy->linkrate, child->max_linkrate); 734 child->pathways = min(child->pathways, parent->pathways); 735} 736 737static struct domain_device *sas_ex_discover_end_dev( 738 struct domain_device *parent, int phy_id) 739{ 740 struct expander_device *parent_ex = &parent->ex_dev; 741 struct ex_phy *phy = &parent_ex->ex_phy[phy_id]; 742 struct domain_device *child = NULL; 743 struct sas_rphy *rphy; 744 int res; 745 746 if (phy->attached_sata_host || phy->attached_sata_ps) 747 return NULL; 748 749 child = sas_alloc_device(); 750 if (!child) 751 return NULL; 752 753 kref_get(&parent->kref); 754 child->parent = parent; 755 child->port = parent->port; 756 child->iproto = phy->attached_iproto; 757 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); 758 sas_hash_addr(child->hashed_sas_addr, child->sas_addr); 759 if (!phy->port) { 760 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); 761 if (unlikely(!phy->port)) 762 goto out_err; 763 if (unlikely(sas_port_add(phy->port) != 0)) { 764 sas_port_free(phy->port); 765 goto out_err; 766 } 767 } 768 sas_ex_get_linkrate(parent, child, phy); 769 sas_device_set_phy(child, phy->port); 770 771#ifdef CONFIG_SCSI_SAS_ATA 772 if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) { 773 res = sas_get_ata_info(child, phy); 774 if (res) 775 goto out_free; 776 777 rphy = sas_end_device_alloc(phy->port); 778 if (unlikely(!rphy)) 779 goto out_free; 780 781 sas_init_dev(child); 782 783 child->rphy = rphy; 784 785 list_add_tail(&child->disco_list_node, &parent->port->disco_list); 786 787 res = sas_discover_sata(child); 788 if (res) { 789 SAS_DPRINTK("sas_discover_sata() for device %16llx at " 790 "%016llx:0x%x returned 0x%x\n", 791 SAS_ADDR(child->sas_addr), 792 SAS_ADDR(parent->sas_addr), phy_id, res); 793 goto out_list_del; 794 } 795 } else 796#endif 797 if (phy->attached_tproto & SAS_PROTOCOL_SSP) { 798 child->dev_type = SAS_END_DEV; 799 rphy = sas_end_device_alloc(phy->port); 800 /* FIXME: error handling */ 801 if (unlikely(!rphy)) 802 goto out_free; 803 child->tproto = phy->attached_tproto; 804 sas_init_dev(child); 805 806 child->rphy = rphy; 807 sas_fill_in_rphy(child, rphy); 808 809 spin_lock_irq(&parent->port->dev_list_lock); 810 list_add_tail(&child->dev_list_node, &parent->port->dev_list); 811 spin_unlock_irq(&parent->port->dev_list_lock); 812 813 res = sas_discover_end_dev(child); 814 if (res) { 815 SAS_DPRINTK("sas_discover_end_dev() for device %16llx " 816 "at %016llx:0x%x returned 0x%x\n", 817 SAS_ADDR(child->sas_addr), 818 SAS_ADDR(parent->sas_addr), phy_id, res); 819 goto out_list_del; 820 } 821 } else { 822 SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n", 823 phy->attached_tproto, SAS_ADDR(parent->sas_addr), 824 phy_id); 825 goto out_free; 826 } 827 828 list_add_tail(&child->siblings, &parent_ex->children); 829 return child; 830 831 out_list_del: 832 sas_rphy_free(child->rphy); 833 child->rphy = NULL; 834 835 list_del(&child->disco_list_node); 836 spin_lock_irq(&parent->port->dev_list_lock); 837 list_del(&child->dev_list_node); 838 spin_unlock_irq(&parent->port->dev_list_lock); 839 out_free: 840 sas_port_delete(phy->port); 841 out_err: 842 phy->port = NULL; 843 sas_put_device(child); 844 return NULL; 845} 846 847/* See if this phy is part of a wide port */ 848static int sas_ex_join_wide_port(struct domain_device *parent, int phy_id) 849{ 850 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; 851 int i; 852 853 for (i = 0; i < parent->ex_dev.num_phys; i++) { 854 struct ex_phy *ephy = &parent->ex_dev.ex_phy[i]; 855 856 if (ephy == phy) 857 continue; 858 859 if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr, 860 SAS_ADDR_SIZE) && ephy->port) { 861 sas_port_add_phy(ephy->port, phy->phy); 862 phy->port = ephy->port; 863 phy->phy_state = PHY_DEVICE_DISCOVERED; 864 return 0; 865 } 866 } 867 868 return -ENODEV; 869} 870 871static struct domain_device *sas_ex_discover_expander( 872 struct domain_device *parent, int phy_id) 873{ 874 struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy); 875 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; 876 struct domain_device *child = NULL; 877 struct sas_rphy *rphy; 878 struct sas_expander_device *edev; 879 struct asd_sas_port *port; 880 int res; 881 882 if (phy->routing_attr == DIRECT_ROUTING) { 883 SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not " 884 "allowed\n", 885 SAS_ADDR(parent->sas_addr), phy_id, 886 SAS_ADDR(phy->attached_sas_addr), 887 phy->attached_phy_id); 888 return NULL; 889 } 890 child = sas_alloc_device(); 891 if (!child) 892 return NULL; 893 894 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); 895 /* FIXME: better error handling */ 896 BUG_ON(sas_port_add(phy->port) != 0); 897 898 899 switch (phy->attached_dev_type) { 900 case EDGE_DEV: 901 rphy = sas_expander_alloc(phy->port, 902 SAS_EDGE_EXPANDER_DEVICE); 903 break; 904 case FANOUT_DEV: 905 rphy = sas_expander_alloc(phy->port, 906 SAS_FANOUT_EXPANDER_DEVICE); 907 break; 908 default: 909 rphy = NULL; /* shut gcc up */ 910 BUG(); 911 } 912 port = parent->port; 913 child->rphy = rphy; 914 edev = rphy_to_expander_device(rphy); 915 child->dev_type = phy->attached_dev_type; 916 kref_get(&parent->kref); 917 child->parent = parent; 918 child->port = port; 919 child->iproto = phy->attached_iproto; 920 child->tproto = phy->attached_tproto; 921 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); 922 sas_hash_addr(child->hashed_sas_addr, child->sas_addr); 923 sas_ex_get_linkrate(parent, child, phy); 924 edev->level = parent_ex->level + 1; 925 parent->port->disc.max_level = max(parent->port->disc.max_level, 926 edev->level); 927 sas_init_dev(child); 928 sas_fill_in_rphy(child, rphy); 929 sas_rphy_add(rphy); 930 931 spin_lock_irq(&parent->port->dev_list_lock); 932 list_add_tail(&child->dev_list_node, &parent->port->dev_list); 933 spin_unlock_irq(&parent->port->dev_list_lock); 934 935 res = sas_discover_expander(child); 936 if (res) { 937 spin_lock_irq(&parent->port->dev_list_lock); 938 list_del(&child->dev_list_node); 939 spin_unlock_irq(&parent->port->dev_list_lock); 940 sas_put_device(child); 941 return NULL; 942 } 943 list_add_tail(&child->siblings, &parent->ex_dev.children); 944 return child; 945} 946 947static int sas_ex_discover_dev(struct domain_device *dev, int phy_id) 948{ 949 struct expander_device *ex = &dev->ex_dev; 950 struct ex_phy *ex_phy = &ex->ex_phy[phy_id]; 951 struct domain_device *child = NULL; 952 int res = 0; 953 954 /* Phy state */ 955 if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) { 956 if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL)) 957 res = sas_ex_phy_discover(dev, phy_id); 958 if (res) 959 return res; 960 } 961 962 /* Parent and domain coherency */ 963 if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == 964 SAS_ADDR(dev->port->sas_addr))) { 965 sas_add_parent_port(dev, phy_id); 966 return 0; 967 } 968 if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == 969 SAS_ADDR(dev->parent->sas_addr))) { 970 sas_add_parent_port(dev, phy_id); 971 if (ex_phy->routing_attr == TABLE_ROUTING) 972 sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1); 973 return 0; 974 } 975 976 if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr)) 977 sas_ex_disable_port(dev, ex_phy->attached_sas_addr); 978 979 if (ex_phy->attached_dev_type == NO_DEVICE) { 980 if (ex_phy->routing_attr == DIRECT_ROUTING) { 981 memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE); 982 sas_configure_routing(dev, ex_phy->attached_sas_addr); 983 } 984 return 0; 985 } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN) 986 return 0; 987 988 if (ex_phy->attached_dev_type != SAS_END_DEV && 989 ex_phy->attached_dev_type != FANOUT_DEV && 990 ex_phy->attached_dev_type != EDGE_DEV && 991 ex_phy->attached_dev_type != SATA_PENDING) { 992 SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx " 993 "phy 0x%x\n", ex_phy->attached_dev_type, 994 SAS_ADDR(dev->sas_addr), 995 phy_id); 996 return 0; 997 } 998 999 res = sas_configure_routing(dev, ex_phy->attached_sas_addr); 1000 if (res) { 1001 SAS_DPRINTK("configure routing for dev %016llx " 1002 "reported 0x%x. Forgotten\n", 1003 SAS_ADDR(ex_phy->attached_sas_addr), res); 1004 sas_disable_routing(dev, ex_phy->attached_sas_addr); 1005 return res; 1006 } 1007 1008 res = sas_ex_join_wide_port(dev, phy_id); 1009 if (!res) { 1010 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n", 1011 phy_id, SAS_ADDR(ex_phy->attached_sas_addr)); 1012 return res; 1013 } 1014 1015 switch (ex_phy->attached_dev_type) { 1016 case SAS_END_DEV: 1017 case SATA_PENDING: 1018 child = sas_ex_discover_end_dev(dev, phy_id); 1019 break; 1020 case FANOUT_DEV: 1021 if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) { 1022 SAS_DPRINTK("second fanout expander %016llx phy 0x%x " 1023 "attached to ex %016llx phy 0x%x\n", 1024 SAS_ADDR(ex_phy->attached_sas_addr), 1025 ex_phy->attached_phy_id, 1026 SAS_ADDR(dev->sas_addr), 1027 phy_id); 1028 sas_ex_disable_phy(dev, phy_id); 1029 break; 1030 } else 1031 memcpy(dev->port->disc.fanout_sas_addr, 1032 ex_phy->attached_sas_addr, SAS_ADDR_SIZE); 1033 /* fallthrough */ 1034 case EDGE_DEV: 1035 child = sas_ex_discover_expander(dev, phy_id); 1036 break; 1037 default: 1038 break; 1039 } 1040 1041 if (child) { 1042 int i; 1043 1044 for (i = 0; i < ex->num_phys; i++) { 1045 if (ex->ex_phy[i].phy_state == PHY_VACANT || 1046 ex->ex_phy[i].phy_state == PHY_NOT_PRESENT) 1047 continue; 1048 /* 1049 * Due to races, the phy might not get added to the 1050 * wide port, so we add the phy to the wide port here. 1051 */ 1052 if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) == 1053 SAS_ADDR(child->sas_addr)) { 1054 ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED; 1055 res = sas_ex_join_wide_port(dev, i); 1056 if (!res) 1057 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n", 1058 i, SAS_ADDR(ex->ex_phy[i].attached_sas_addr)); 1059 1060 } 1061 } 1062 } 1063 1064 return res; 1065} 1066 1067static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr) 1068{ 1069 struct expander_device *ex = &dev->ex_dev; 1070 int i; 1071 1072 for (i = 0; i < ex->num_phys; i++) { 1073 struct ex_phy *phy = &ex->ex_phy[i]; 1074 1075 if (phy->phy_state == PHY_VACANT || 1076 phy->phy_state == PHY_NOT_PRESENT) 1077 continue; 1078 1079 if ((phy->attached_dev_type == EDGE_DEV || 1080 phy->attached_dev_type == FANOUT_DEV) && 1081 phy->routing_attr == SUBTRACTIVE_ROUTING) { 1082 1083 memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE); 1084 1085 return 1; 1086 } 1087 } 1088 return 0; 1089} 1090 1091static int sas_check_level_subtractive_boundary(struct domain_device *dev) 1092{ 1093 struct expander_device *ex = &dev->ex_dev; 1094 struct domain_device *child; 1095 u8 sub_addr[8] = {0, }; 1096 1097 list_for_each_entry(child, &ex->children, siblings) { 1098 if (child->dev_type != EDGE_DEV && 1099 child->dev_type != FANOUT_DEV) 1100 continue; 1101 if (sub_addr[0] == 0) { 1102 sas_find_sub_addr(child, sub_addr); 1103 continue; 1104 } else { 1105 u8 s2[8]; 1106 1107 if (sas_find_sub_addr(child, s2) && 1108 (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) { 1109 1110 SAS_DPRINTK("ex %016llx->%016llx-?->%016llx " 1111 "diverges from subtractive " 1112 "boundary %016llx\n", 1113 SAS_ADDR(dev->sas_addr), 1114 SAS_ADDR(child->sas_addr), 1115 SAS_ADDR(s2), 1116 SAS_ADDR(sub_addr)); 1117 1118 sas_ex_disable_port(child, s2); 1119 } 1120 } 1121 } 1122 return 0; 1123} 1124/** 1125 * sas_ex_discover_devices -- discover devices attached to this expander 1126 * dev: pointer to the expander domain device 1127 * single: if you want to do a single phy, else set to -1; 1128 * 1129 * Configure this expander for use with its devices and register the 1130 * devices of this expander. 1131 */ 1132static int sas_ex_discover_devices(struct domain_device *dev, int single) 1133{ 1134 struct expander_device *ex = &dev->ex_dev; 1135 int i = 0, end = ex->num_phys; 1136 int res = 0; 1137 1138 if (0 <= single && single < end) { 1139 i = single; 1140 end = i+1; 1141 } 1142 1143 for ( ; i < end; i++) { 1144 struct ex_phy *ex_phy = &ex->ex_phy[i]; 1145 1146 if (ex_phy->phy_state == PHY_VACANT || 1147 ex_phy->phy_state == PHY_NOT_PRESENT || 1148 ex_phy->phy_state == PHY_DEVICE_DISCOVERED) 1149 continue; 1150 1151 switch (ex_phy->linkrate) { 1152 case SAS_PHY_DISABLED: 1153 case SAS_PHY_RESET_PROBLEM: 1154 case SAS_SATA_PORT_SELECTOR: 1155 continue; 1156 default: 1157 res = sas_ex_discover_dev(dev, i); 1158 if (res) 1159 break; 1160 continue; 1161 } 1162 } 1163 1164 if (!res) 1165 sas_check_level_subtractive_boundary(dev); 1166 1167 return res; 1168} 1169 1170static int sas_check_ex_subtractive_boundary(struct domain_device *dev) 1171{ 1172 struct expander_device *ex = &dev->ex_dev; 1173 int i; 1174 u8 *sub_sas_addr = NULL; 1175 1176 if (dev->dev_type != EDGE_DEV) 1177 return 0; 1178 1179 for (i = 0; i < ex->num_phys; i++) { 1180 struct ex_phy *phy = &ex->ex_phy[i]; 1181 1182 if (phy->phy_state == PHY_VACANT || 1183 phy->phy_state == PHY_NOT_PRESENT) 1184 continue; 1185 1186 if ((phy->attached_dev_type == FANOUT_DEV || 1187 phy->attached_dev_type == EDGE_DEV) && 1188 phy->routing_attr == SUBTRACTIVE_ROUTING) { 1189 1190 if (!sub_sas_addr) 1191 sub_sas_addr = &phy->attached_sas_addr[0]; 1192 else if (SAS_ADDR(sub_sas_addr) != 1193 SAS_ADDR(phy->attached_sas_addr)) { 1194 1195 SAS_DPRINTK("ex %016llx phy 0x%x " 1196 "diverges(%016llx) on subtractive " 1197 "boundary(%016llx). Disabled\n", 1198 SAS_ADDR(dev->sas_addr), i, 1199 SAS_ADDR(phy->attached_sas_addr), 1200 SAS_ADDR(sub_sas_addr)); 1201 sas_ex_disable_phy(dev, i); 1202 } 1203 } 1204 } 1205 return 0; 1206} 1207 1208static void sas_print_parent_topology_bug(struct domain_device *child, 1209 struct ex_phy *parent_phy, 1210 struct ex_phy *child_phy) 1211{ 1212 static const char *ex_type[] = { 1213 [EDGE_DEV] = "edge", 1214 [FANOUT_DEV] = "fanout", 1215 }; 1216 struct domain_device *parent = child->parent; 1217 1218 sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx " 1219 "phy 0x%x has %c:%c routing link!\n", 1220 1221 ex_type[parent->dev_type], 1222 SAS_ADDR(parent->sas_addr), 1223 parent_phy->phy_id, 1224 1225 ex_type[child->dev_type], 1226 SAS_ADDR(child->sas_addr), 1227 child_phy->phy_id, 1228 1229 sas_route_char(parent, parent_phy), 1230 sas_route_char(child, child_phy)); 1231} 1232 1233static int sas_check_eeds(struct domain_device *child, 1234 struct ex_phy *parent_phy, 1235 struct ex_phy *child_phy) 1236{ 1237 int res = 0; 1238 struct domain_device *parent = child->parent; 1239 1240 if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) { 1241 res = -ENODEV; 1242 SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx " 1243 "phy S:0x%x, while there is a fanout ex %016llx\n", 1244 SAS_ADDR(parent->sas_addr), 1245 parent_phy->phy_id, 1246 SAS_ADDR(child->sas_addr), 1247 child_phy->phy_id, 1248 SAS_ADDR(parent->port->disc.fanout_sas_addr)); 1249 } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) { 1250 memcpy(parent->port->disc.eeds_a, parent->sas_addr, 1251 SAS_ADDR_SIZE); 1252 memcpy(parent->port->disc.eeds_b, child->sas_addr, 1253 SAS_ADDR_SIZE); 1254 } else if (((SAS_ADDR(parent->port->disc.eeds_a) == 1255 SAS_ADDR(parent->sas_addr)) || 1256 (SAS_ADDR(parent->port->disc.eeds_a) == 1257 SAS_ADDR(child->sas_addr))) 1258 && 1259 ((SAS_ADDR(parent->port->disc.eeds_b) == 1260 SAS_ADDR(parent->sas_addr)) || 1261 (SAS_ADDR(parent->port->disc.eeds_b) == 1262 SAS_ADDR(child->sas_addr)))) 1263 ; 1264 else { 1265 res = -ENODEV; 1266 SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx " 1267 "phy 0x%x link forms a third EEDS!\n", 1268 SAS_ADDR(parent->sas_addr), 1269 parent_phy->phy_id, 1270 SAS_ADDR(child->sas_addr), 1271 child_phy->phy_id); 1272 } 1273 1274 return res; 1275} 1276 1277/* Here we spill over 80 columns. It is intentional. 1278 */ 1279static int sas_check_parent_topology(struct domain_device *child) 1280{ 1281 struct expander_device *child_ex = &child->ex_dev; 1282 struct expander_device *parent_ex; 1283 int i; 1284 int res = 0; 1285 1286 if (!child->parent) 1287 return 0; 1288 1289 if (child->parent->dev_type != EDGE_DEV && 1290 child->parent->dev_type != FANOUT_DEV) 1291 return 0; 1292 1293 parent_ex = &child->parent->ex_dev; 1294 1295 for (i = 0; i < parent_ex->num_phys; i++) { 1296 struct ex_phy *parent_phy = &parent_ex->ex_phy[i]; 1297 struct ex_phy *child_phy; 1298 1299 if (parent_phy->phy_state == PHY_VACANT || 1300 parent_phy->phy_state == PHY_NOT_PRESENT) 1301 continue; 1302 1303 if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr)) 1304 continue; 1305 1306 child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id]; 1307 1308 switch (child->parent->dev_type) { 1309 case EDGE_DEV: 1310 if (child->dev_type == FANOUT_DEV) { 1311 if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING || 1312 child_phy->routing_attr != TABLE_ROUTING) { 1313 sas_print_parent_topology_bug(child, parent_phy, child_phy); 1314 res = -ENODEV; 1315 } 1316 } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) { 1317 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) { 1318 res = sas_check_eeds(child, parent_phy, child_phy); 1319 } else if (child_phy->routing_attr != TABLE_ROUTING) { 1320 sas_print_parent_topology_bug(child, parent_phy, child_phy); 1321 res = -ENODEV; 1322 } 1323 } else if (parent_phy->routing_attr == TABLE_ROUTING) { 1324 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING || 1325 (child_phy->routing_attr == TABLE_ROUTING && 1326 child_ex->t2t_supp && parent_ex->t2t_supp)) { 1327 /* All good */; 1328 } else { 1329 sas_print_parent_topology_bug(child, parent_phy, child_phy); 1330 res = -ENODEV; 1331 } 1332 } 1333 break; 1334 case FANOUT_DEV: 1335 if (parent_phy->routing_attr != TABLE_ROUTING || 1336 child_phy->routing_attr != SUBTRACTIVE_ROUTING) { 1337 sas_print_parent_topology_bug(child, parent_phy, child_phy); 1338 res = -ENODEV; 1339 } 1340 break; 1341 default: 1342 break; 1343 } 1344 } 1345 1346 return res; 1347} 1348 1349#define RRI_REQ_SIZE 16 1350#define RRI_RESP_SIZE 44 1351 1352static int sas_configure_present(struct domain_device *dev, int phy_id, 1353 u8 *sas_addr, int *index, int *present) 1354{ 1355 int i, res = 0; 1356 struct expander_device *ex = &dev->ex_dev; 1357 struct ex_phy *phy = &ex->ex_phy[phy_id]; 1358 u8 *rri_req; 1359 u8 *rri_resp; 1360 1361 *present = 0; 1362 *index = 0; 1363 1364 rri_req = alloc_smp_req(RRI_REQ_SIZE); 1365 if (!rri_req) 1366 return -ENOMEM; 1367 1368 rri_resp = alloc_smp_resp(RRI_RESP_SIZE); 1369 if (!rri_resp) { 1370 kfree(rri_req); 1371 return -ENOMEM; 1372 } 1373 1374 rri_req[1] = SMP_REPORT_ROUTE_INFO; 1375 rri_req[9] = phy_id; 1376 1377 for (i = 0; i < ex->max_route_indexes ; i++) { 1378 *(__be16 *)(rri_req+6) = cpu_to_be16(i); 1379 res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp, 1380 RRI_RESP_SIZE); 1381 if (res) 1382 goto out; 1383 res = rri_resp[2]; 1384 if (res == SMP_RESP_NO_INDEX) { 1385 SAS_DPRINTK("overflow of indexes: dev %016llx " 1386 "phy 0x%x index 0x%x\n", 1387 SAS_ADDR(dev->sas_addr), phy_id, i); 1388 goto out; 1389 } else if (res != SMP_RESP_FUNC_ACC) { 1390 SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x " 1391 "result 0x%x\n", __func__, 1392 SAS_ADDR(dev->sas_addr), phy_id, i, res); 1393 goto out; 1394 } 1395 if (SAS_ADDR(sas_addr) != 0) { 1396 if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) { 1397 *index = i; 1398 if ((rri_resp[12] & 0x80) == 0x80) 1399 *present = 0; 1400 else 1401 *present = 1; 1402 goto out; 1403 } else if (SAS_ADDR(rri_resp+16) == 0) { 1404 *index = i; 1405 *present = 0; 1406 goto out; 1407 } 1408 } else if (SAS_ADDR(rri_resp+16) == 0 && 1409 phy->last_da_index < i) { 1410 phy->last_da_index = i; 1411 *index = i; 1412 *present = 0; 1413 goto out; 1414 } 1415 } 1416 res = -1; 1417out: 1418 kfree(rri_req); 1419 kfree(rri_resp); 1420 return res; 1421} 1422 1423#define CRI_REQ_SIZE 44 1424#define CRI_RESP_SIZE 8 1425 1426static int sas_configure_set(struct domain_device *dev, int phy_id, 1427 u8 *sas_addr, int index, int include) 1428{ 1429 int res; 1430 u8 *cri_req; 1431 u8 *cri_resp; 1432 1433 cri_req = alloc_smp_req(CRI_REQ_SIZE); 1434 if (!cri_req) 1435 return -ENOMEM; 1436 1437 cri_resp = alloc_smp_resp(CRI_RESP_SIZE); 1438 if (!cri_resp) { 1439 kfree(cri_req); 1440 return -ENOMEM; 1441 } 1442 1443 cri_req[1] = SMP_CONF_ROUTE_INFO; 1444 *(__be16 *)(cri_req+6) = cpu_to_be16(index); 1445 cri_req[9] = phy_id; 1446 if (SAS_ADDR(sas_addr) == 0 || !include) 1447 cri_req[12] |= 0x80; 1448 memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE); 1449 1450 res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp, 1451 CRI_RESP_SIZE); 1452 if (res) 1453 goto out; 1454 res = cri_resp[2]; 1455 if (res == SMP_RESP_NO_INDEX) { 1456 SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x " 1457 "index 0x%x\n", 1458 SAS_ADDR(dev->sas_addr), phy_id, index); 1459 } 1460out: 1461 kfree(cri_req); 1462 kfree(cri_resp); 1463 return res; 1464} 1465 1466static int sas_configure_phy(struct domain_device *dev, int phy_id, 1467 u8 *sas_addr, int include) 1468{ 1469 int index; 1470 int present; 1471 int res; 1472 1473 res = sas_configure_present(dev, phy_id, sas_addr, &index, &present); 1474 if (res) 1475 return res; 1476 if (include ^ present) 1477 return sas_configure_set(dev, phy_id, sas_addr, index,include); 1478 1479 return res; 1480} 1481 1482/** 1483 * sas_configure_parent -- configure routing table of parent 1484 * parent: parent expander 1485 * child: child expander 1486 * sas_addr: SAS port identifier of device directly attached to child 1487 */ 1488static int sas_configure_parent(struct domain_device *parent, 1489 struct domain_device *child, 1490 u8 *sas_addr, int include) 1491{ 1492 struct expander_device *ex_parent = &parent->ex_dev; 1493 int res = 0; 1494 int i; 1495 1496 if (parent->parent) { 1497 res = sas_configure_parent(parent->parent, parent, sas_addr, 1498 include); 1499 if (res) 1500 return res; 1501 } 1502 1503 if (ex_parent->conf_route_table == 0) { 1504 SAS_DPRINTK("ex %016llx has self-configuring routing table\n", 1505 SAS_ADDR(parent->sas_addr)); 1506 return 0; 1507 } 1508 1509 for (i = 0; i < ex_parent->num_phys; i++) { 1510 struct ex_phy *phy = &ex_parent->ex_phy[i]; 1511 1512 if ((phy->routing_attr == TABLE_ROUTING) && 1513 (SAS_ADDR(phy->attached_sas_addr) == 1514 SAS_ADDR(child->sas_addr))) { 1515 res = sas_configure_phy(parent, i, sas_addr, include); 1516 if (res) 1517 return res; 1518 } 1519 } 1520 1521 return res; 1522} 1523 1524/** 1525 * sas_configure_routing -- configure routing 1526 * dev: expander device 1527 * sas_addr: port identifier of device directly attached to the expander device 1528 */ 1529static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr) 1530{ 1531 if (dev->parent) 1532 return sas_configure_parent(dev->parent, dev, sas_addr, 1); 1533 return 0; 1534} 1535 1536static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr) 1537{ 1538 if (dev->parent) 1539 return sas_configure_parent(dev->parent, dev, sas_addr, 0); 1540 return 0; 1541} 1542 1543/** 1544 * sas_discover_expander -- expander discovery 1545 * @ex: pointer to expander domain device 1546 * 1547 * See comment in sas_discover_sata(). 1548 */ 1549static int sas_discover_expander(struct domain_device *dev) 1550{ 1551 int res; 1552 1553 res = sas_notify_lldd_dev_found(dev); 1554 if (res) 1555 return res; 1556 1557 res = sas_ex_general(dev); 1558 if (res) 1559 goto out_err; 1560 res = sas_ex_manuf_info(dev); 1561 if (res) 1562 goto out_err; 1563 1564 res = sas_expander_discover(dev); 1565 if (res) { 1566 SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n", 1567 SAS_ADDR(dev->sas_addr), res); 1568 goto out_err; 1569 } 1570 1571 sas_check_ex_subtractive_boundary(dev); 1572 res = sas_check_parent_topology(dev); 1573 if (res) 1574 goto out_err; 1575 return 0; 1576out_err: 1577 sas_notify_lldd_dev_gone(dev); 1578 return res; 1579} 1580 1581static int sas_ex_level_discovery(struct asd_sas_port *port, const int level) 1582{ 1583 int res = 0; 1584 struct domain_device *dev; 1585 1586 list_for_each_entry(dev, &port->dev_list, dev_list_node) { 1587 if (dev->dev_type == EDGE_DEV || 1588 dev->dev_type == FANOUT_DEV) { 1589 struct sas_expander_device *ex = 1590 rphy_to_expander_device(dev->rphy); 1591 1592 if (level == ex->level) 1593 res = sas_ex_discover_devices(dev, -1); 1594 else if (level > 0) 1595 res = sas_ex_discover_devices(port->port_dev, -1); 1596 1597 } 1598 } 1599 1600 return res; 1601} 1602 1603static int sas_ex_bfs_disc(struct asd_sas_port *port) 1604{ 1605 int res; 1606 int level; 1607 1608 do { 1609 level = port->disc.max_level; 1610 res = sas_ex_level_discovery(port, level); 1611 mb(); 1612 } while (level < port->disc.max_level); 1613 1614 return res; 1615} 1616 1617int sas_discover_root_expander(struct domain_device *dev) 1618{ 1619 int res; 1620 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); 1621 1622 res = sas_rphy_add(dev->rphy); 1623 if (res) 1624 goto out_err; 1625 1626 ex->level = dev->port->disc.max_level; /* 0 */ 1627 res = sas_discover_expander(dev); 1628 if (res) 1629 goto out_err2; 1630 1631 sas_ex_bfs_disc(dev->port); 1632 1633 return res; 1634 1635out_err2: 1636 sas_rphy_remove(dev->rphy); 1637out_err: 1638 return res; 1639} 1640 1641/* ---------- Domain revalidation ---------- */ 1642 1643static int sas_get_phy_discover(struct domain_device *dev, 1644 int phy_id, struct smp_resp *disc_resp) 1645{ 1646 int res; 1647 u8 *disc_req; 1648 1649 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); 1650 if (!disc_req) 1651 return -ENOMEM; 1652 1653 disc_req[1] = SMP_DISCOVER; 1654 disc_req[9] = phy_id; 1655 1656 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, 1657 disc_resp, DISCOVER_RESP_SIZE); 1658 if (res) 1659 goto out; 1660 else if (disc_resp->result != SMP_RESP_FUNC_ACC) { 1661 res = disc_resp->result; 1662 goto out; 1663 } 1664out: 1665 kfree(disc_req); 1666 return res; 1667} 1668 1669static int sas_get_phy_change_count(struct domain_device *dev, 1670 int phy_id, int *pcc) 1671{ 1672 int res; 1673 struct smp_resp *disc_resp; 1674 1675 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); 1676 if (!disc_resp) 1677 return -ENOMEM; 1678 1679 res = sas_get_phy_discover(dev, phy_id, disc_resp); 1680 if (!res) 1681 *pcc = disc_resp->disc.change_count; 1682 1683 kfree(disc_resp); 1684 return res; 1685} 1686 1687static int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id, 1688 u8 *sas_addr, enum sas_dev_type *type) 1689{ 1690 int res; 1691 struct smp_resp *disc_resp; 1692 struct discover_resp *dr; 1693 1694 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); 1695 if (!disc_resp) 1696 return -ENOMEM; 1697 dr = &disc_resp->disc; 1698 1699 res = sas_get_phy_discover(dev, phy_id, disc_resp); 1700 if (res == 0) { 1701 memcpy(sas_addr, disc_resp->disc.attached_sas_addr, 8); 1702 *type = to_dev_type(dr); 1703 if (*type == 0) 1704 memset(sas_addr, 0, 8); 1705 } 1706 kfree(disc_resp); 1707 return res; 1708} 1709 1710static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id, 1711 int from_phy, bool update) 1712{ 1713 struct expander_device *ex = &dev->ex_dev; 1714 int res = 0; 1715 int i; 1716 1717 for (i = from_phy; i < ex->num_phys; i++) { 1718 int phy_change_count = 0; 1719 1720 res = sas_get_phy_change_count(dev, i, &phy_change_count); 1721 if (res) 1722 goto out; 1723 else if (phy_change_count != ex->ex_phy[i].phy_change_count) { 1724 if (update) 1725 ex->ex_phy[i].phy_change_count = 1726 phy_change_count; 1727 *phy_id = i; 1728 return 0; 1729 } 1730 } 1731out: 1732 return res; 1733} 1734 1735static int sas_get_ex_change_count(struct domain_device *dev, int *ecc) 1736{ 1737 int res; 1738 u8 *rg_req; 1739 struct smp_resp *rg_resp; 1740 1741 rg_req = alloc_smp_req(RG_REQ_SIZE); 1742 if (!rg_req) 1743 return -ENOMEM; 1744 1745 rg_resp = alloc_smp_resp(RG_RESP_SIZE); 1746 if (!rg_resp) { 1747 kfree(rg_req); 1748 return -ENOMEM; 1749 } 1750 1751 rg_req[1] = SMP_REPORT_GENERAL; 1752 1753 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, 1754 RG_RESP_SIZE); 1755 if (res) 1756 goto out; 1757 if (rg_resp->result != SMP_RESP_FUNC_ACC) { 1758 res = rg_resp->result; 1759 goto out; 1760 } 1761 1762 *ecc = be16_to_cpu(rg_resp->rg.change_count); 1763out: 1764 kfree(rg_resp); 1765 kfree(rg_req); 1766 return res; 1767} 1768/** 1769 * sas_find_bcast_dev - find the device issue BROADCAST(CHANGE). 1770 * @dev:domain device to be detect. 1771 * @src_dev: the device which originated BROADCAST(CHANGE). 1772 * 1773 * Add self-configuration expander suport. Suppose two expander cascading, 1774 * when the first level expander is self-configuring, hotplug the disks in 1775 * second level expander, BROADCAST(CHANGE) will not only be originated 1776 * in the second level expander, but also be originated in the first level 1777 * expander (see SAS protocol SAS 2r-14, 7.11 for detail), it is to say, 1778 * expander changed count in two level expanders will all increment at least 1779 * once, but the phy which chang count has changed is the source device which 1780 * we concerned. 1781 */ 1782 1783static int sas_find_bcast_dev(struct domain_device *dev, 1784 struct domain_device **src_dev) 1785{ 1786 struct expander_device *ex = &dev->ex_dev; 1787 int ex_change_count = -1; 1788 int phy_id = -1; 1789 int res; 1790 struct domain_device *ch; 1791 1792 res = sas_get_ex_change_count(dev, &ex_change_count); 1793 if (res) 1794 goto out; 1795 if (ex_change_count != -1 && ex_change_count != ex->ex_change_count) { 1796 /* Just detect if this expander phys phy change count changed, 1797 * in order to determine if this expander originate BROADCAST, 1798 * and do not update phy change count field in our structure. 1799 */ 1800 res = sas_find_bcast_phy(dev, &phy_id, 0, false); 1801 if (phy_id != -1) { 1802 *src_dev = dev; 1803 ex->ex_change_count = ex_change_count; 1804 SAS_DPRINTK("Expander phy change count has changed\n"); 1805 return res; 1806 } else 1807 SAS_DPRINTK("Expander phys DID NOT change\n"); 1808 } 1809 list_for_each_entry(ch, &ex->children, siblings) { 1810 if (ch->dev_type == EDGE_DEV || ch->dev_type == FANOUT_DEV) { 1811 res = sas_find_bcast_dev(ch, src_dev); 1812 if (*src_dev) 1813 return res; 1814 } 1815 } 1816out: 1817 return res; 1818} 1819 1820static void sas_unregister_ex_tree(struct asd_sas_port *port, struct domain_device *dev) 1821{ 1822 struct expander_device *ex = &dev->ex_dev; 1823 struct domain_device *child, *n; 1824 1825 list_for_each_entry_safe(child, n, &ex->children, siblings) { 1826 set_bit(SAS_DEV_GONE, &child->state); 1827 if (child->dev_type == EDGE_DEV || 1828 child->dev_type == FANOUT_DEV) 1829 sas_unregister_ex_tree(port, child); 1830 else 1831 sas_unregister_dev(port, child); 1832 } 1833 sas_unregister_dev(port, dev); 1834} 1835 1836static void sas_unregister_devs_sas_addr(struct domain_device *parent, 1837 int phy_id, bool last) 1838{ 1839 struct expander_device *ex_dev = &parent->ex_dev; 1840 struct ex_phy *phy = &ex_dev->ex_phy[phy_id]; 1841 struct domain_device *child, *n, *found = NULL; 1842 if (last) { 1843 list_for_each_entry_safe(child, n, 1844 &ex_dev->children, siblings) { 1845 if (SAS_ADDR(child->sas_addr) == 1846 SAS_ADDR(phy->attached_sas_addr)) { 1847 set_bit(SAS_DEV_GONE, &child->state); 1848 if (child->dev_type == EDGE_DEV || 1849 child->dev_type == FANOUT_DEV) 1850 sas_unregister_ex_tree(parent->port, child); 1851 else 1852 sas_unregister_dev(parent->port, child); 1853 found = child; 1854 break; 1855 } 1856 } 1857 sas_disable_routing(parent, phy->attached_sas_addr); 1858 } 1859 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); 1860 if (phy->port) { 1861 sas_port_delete_phy(phy->port, phy->phy); 1862 sas_device_set_phy(found, phy->port); 1863 if (phy->port->num_phys == 0) 1864 sas_port_delete(phy->port); 1865 phy->port = NULL; 1866 } 1867} 1868 1869static int sas_discover_bfs_by_root_level(struct domain_device *root, 1870 const int level) 1871{ 1872 struct expander_device *ex_root = &root->ex_dev; 1873 struct domain_device *child; 1874 int res = 0; 1875 1876 list_for_each_entry(child, &ex_root->children, siblings) { 1877 if (child->dev_type == EDGE_DEV || 1878 child->dev_type == FANOUT_DEV) { 1879 struct sas_expander_device *ex = 1880 rphy_to_expander_device(child->rphy); 1881 1882 if (level > ex->level) 1883 res = sas_discover_bfs_by_root_level(child, 1884 level); 1885 else if (level == ex->level) 1886 res = sas_ex_discover_devices(child, -1); 1887 } 1888 } 1889 return res; 1890} 1891 1892static int sas_discover_bfs_by_root(struct domain_device *dev) 1893{ 1894 int res; 1895 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); 1896 int level = ex->level+1; 1897 1898 res = sas_ex_discover_devices(dev, -1); 1899 if (res) 1900 goto out; 1901 do { 1902 res = sas_discover_bfs_by_root_level(dev, level); 1903 mb(); 1904 level += 1; 1905 } while (level <= dev->port->disc.max_level); 1906out: 1907 return res; 1908} 1909 1910static int sas_discover_new(struct domain_device *dev, int phy_id) 1911{ 1912 struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id]; 1913 struct domain_device *child; 1914 bool found = false; 1915 int res, i; 1916 1917 SAS_DPRINTK("ex %016llx phy%d new device attached\n", 1918 SAS_ADDR(dev->sas_addr), phy_id); 1919 res = sas_ex_phy_discover(dev, phy_id); 1920 if (res) 1921 goto out; 1922 /* to support the wide port inserted */ 1923 for (i = 0; i < dev->ex_dev.num_phys; i++) { 1924 struct ex_phy *ex_phy_temp = &dev->ex_dev.ex_phy[i]; 1925 if (i == phy_id) 1926 continue; 1927 if (SAS_ADDR(ex_phy_temp->attached_sas_addr) == 1928 SAS_ADDR(ex_phy->attached_sas_addr)) { 1929 found = true; 1930 break; 1931 } 1932 } 1933 if (found) { 1934 sas_ex_join_wide_port(dev, phy_id); 1935 return 0; 1936 } 1937 res = sas_ex_discover_devices(dev, phy_id); 1938 if (!res) 1939 goto out; 1940 list_for_each_entry(child, &dev->ex_dev.children, siblings) { 1941 if (SAS_ADDR(child->sas_addr) == 1942 SAS_ADDR(ex_phy->attached_sas_addr)) { 1943 if (child->dev_type == EDGE_DEV || 1944 child->dev_type == FANOUT_DEV) 1945 res = sas_discover_bfs_by_root(child); 1946 break; 1947 } 1948 } 1949out: 1950 return res; 1951} 1952 1953static bool dev_type_flutter(enum sas_dev_type new, enum sas_dev_type old) 1954{ 1955 if (old == new) 1956 return true; 1957 1958 /* treat device directed resets as flutter, if we went 1959 * SAS_END_DEV to SATA_PENDING the link needs recovery 1960 */ 1961 if ((old == SATA_PENDING && new == SAS_END_DEV) || 1962 (old == SAS_END_DEV && new == SATA_PENDING)) 1963 return true; 1964 1965 return false; 1966} 1967 1968static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last) 1969{ 1970 struct expander_device *ex = &dev->ex_dev; 1971 struct ex_phy *phy = &ex->ex_phy[phy_id]; 1972 enum sas_dev_type type = NO_DEVICE; 1973 u8 sas_addr[8]; 1974 int res; 1975 1976 res = sas_get_phy_attached_dev(dev, phy_id, sas_addr, &type); 1977 switch (res) { 1978 case SMP_RESP_NO_PHY: 1979 phy->phy_state = PHY_NOT_PRESENT; 1980 sas_unregister_devs_sas_addr(dev, phy_id, last); 1981 return res; 1982 case SMP_RESP_PHY_VACANT: 1983 phy->phy_state = PHY_VACANT; 1984 sas_unregister_devs_sas_addr(dev, phy_id, last); 1985 return res; 1986 case SMP_RESP_FUNC_ACC: 1987 break; 1988 } 1989 1990 if (SAS_ADDR(sas_addr) == 0) { 1991 phy->phy_state = PHY_EMPTY; 1992 sas_unregister_devs_sas_addr(dev, phy_id, last); 1993 return res; 1994 } else if (SAS_ADDR(sas_addr) == SAS_ADDR(phy->attached_sas_addr) && 1995 dev_type_flutter(type, phy->attached_dev_type)) { 1996 struct domain_device *ata_dev = sas_ex_to_ata(dev, phy_id); 1997 char *action = ""; 1998 1999 sas_ex_phy_discover(dev, phy_id); 2000 2001 if (ata_dev && phy->attached_dev_type == SATA_PENDING) 2002 action = ", needs recovery"; 2003 SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter%s\n", 2004 SAS_ADDR(dev->sas_addr), phy_id, action); 2005 return res; 2006 } 2007 2008 return sas_discover_new(dev, phy_id); 2009} 2010 2011/** 2012 * sas_rediscover - revalidate the domain. 2013 * @dev:domain device to be detect. 2014 * @phy_id: the phy id will be detected. 2015 * 2016 * NOTE: this process _must_ quit (return) as soon as any connection 2017 * errors are encountered. Connection recovery is done elsewhere. 2018 * Discover process only interrogates devices in order to discover the 2019 * domain.For plugging out, we un-register the device only when it is 2020 * the last phy in the port, for other phys in this port, we just delete it 2021 * from the port.For inserting, we do discovery when it is the 2022 * first phy,for other phys in this port, we add it to the port to 2023 * forming the wide-port. 2024 */ 2025static int sas_rediscover(struct domain_device *dev, const int phy_id) 2026{ 2027 struct expander_device *ex = &dev->ex_dev; 2028 struct ex_phy *changed_phy = &ex->ex_phy[phy_id]; 2029 int res = 0; 2030 int i; 2031 bool last = true; /* is this the last phy of the port */ 2032 2033 SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n", 2034 SAS_ADDR(dev->sas_addr), phy_id); 2035 2036 if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) { 2037 for (i = 0; i < ex->num_phys; i++) { 2038 struct ex_phy *phy = &ex->ex_phy[i]; 2039 2040 if (i == phy_id) 2041 continue; 2042 if (SAS_ADDR(phy->attached_sas_addr) == 2043 SAS_ADDR(changed_phy->attached_sas_addr)) { 2044 SAS_DPRINTK("phy%d part of wide port with " 2045 "phy%d\n", phy_id, i); 2046 last = false; 2047 break; 2048 } 2049 } 2050 res = sas_rediscover_dev(dev, phy_id, last); 2051 } else 2052 res = sas_discover_new(dev, phy_id); 2053 return res; 2054} 2055 2056/** 2057 * sas_revalidate_domain -- revalidate the domain 2058 * @port: port to the domain of interest 2059 * 2060 * NOTE: this process _must_ quit (return) as soon as any connection 2061 * errors are encountered. Connection recovery is done elsewhere. 2062 * Discover process only interrogates devices in order to discover the 2063 * domain. 2064 */ 2065int sas_ex_revalidate_domain(struct domain_device *port_dev) 2066{ 2067 int res; 2068 struct domain_device *dev = NULL; 2069 2070 res = sas_find_bcast_dev(port_dev, &dev); 2071 if (res) 2072 goto out; 2073 if (dev) { 2074 struct expander_device *ex = &dev->ex_dev; 2075 int i = 0, phy_id; 2076 2077 do { 2078 phy_id = -1; 2079 res = sas_find_bcast_phy(dev, &phy_id, i, true); 2080 if (phy_id == -1) 2081 break; 2082 res = sas_rediscover(dev, phy_id); 2083 i = phy_id + 1; 2084 } while (i < ex->num_phys); 2085 } 2086out: 2087 return res; 2088} 2089 2090int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy, 2091 struct request *req) 2092{ 2093 struct domain_device *dev; 2094 int ret, type; 2095 struct request *rsp = req->next_rq; 2096 2097 if (!rsp) { 2098 printk("%s: space for a smp response is missing\n", 2099 __func__); 2100 return -EINVAL; 2101 } 2102 2103 /* no rphy means no smp target support (ie aic94xx host) */ 2104 if (!rphy) 2105 return sas_smp_host_handler(shost, req, rsp); 2106 2107 type = rphy->identify.device_type; 2108 2109 if (type != SAS_EDGE_EXPANDER_DEVICE && 2110 type != SAS_FANOUT_EXPANDER_DEVICE) { 2111 printk("%s: can we send a smp request to a device?\n", 2112 __func__); 2113 return -EINVAL; 2114 } 2115 2116 dev = sas_find_dev_by_rphy(rphy); 2117 if (!dev) { 2118 printk("%s: fail to find a domain_device?\n", __func__); 2119 return -EINVAL; 2120 } 2121 2122 /* do we need to support multiple segments? */ 2123 if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) { 2124 printk("%s: multiple segments req %u %u, rsp %u %u\n", 2125 __func__, req->bio->bi_vcnt, blk_rq_bytes(req), 2126 rsp->bio->bi_vcnt, blk_rq_bytes(rsp)); 2127 return -EINVAL; 2128 } 2129 2130 ret = smp_execute_task(dev, bio_data(req->bio), blk_rq_bytes(req), 2131 bio_data(rsp->bio), blk_rq_bytes(rsp)); 2132 if (ret > 0) { 2133 /* positive number is the untransferred residual */ 2134 rsp->resid_len = ret; 2135 req->resid_len = 0; 2136 ret = 0; 2137 } else if (ret == 0) { 2138 rsp->resid_len = 0; 2139 req->resid_len = 0; 2140 } 2141 2142 return ret; 2143} 2144