Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/vmware/pvscsi/pvscsi.c
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1 /*- 2 * Copyright (c) 2018 VMware, Inc. 3 * 4 * SPDX-License-Identifier: (BSD-2-Clause OR GPL-2.0) 5 */ 6 7 #include <sys/cdefs.h> 8 __FBSDID("$FreeBSD$"); 9 10 #include <sys/param.h> 11 #include <sys/bus.h> 12 #include <sys/errno.h> 13 #include <sys/kernel.h> 14 #include <sys/malloc.h> 15 #include <sys/module.h> 16 #include <sys/queue.h> 17 #include <sys/rman.h> 18 #include <sys/sysctl.h> 19 #include <sys/systm.h> 20 21 #include <machine/bus.h> 22 #include <machine/resource.h> 23 24 #include <dev/pci/pcireg.h> 25 #include <dev/pci/pcivar.h> 26 27 #include <cam/cam.h> 28 #include <cam/cam_ccb.h> 29 #include <cam/cam_debug.h> 30 #include <cam/cam_sim.h> 31 #include <cam/cam_xpt_sim.h> 32 #include <cam/scsi/scsi_message.h> 33 34 #include "pvscsi.h" 35 36 #define PVSCSI_DEFAULT_NUM_PAGES_REQ_RING 8 37 #define PVSCSI_SENSE_LENGTH 256 38 39 MALLOC_DECLARE(M_PVSCSI); 40 MALLOC_DEFINE(M_PVSCSI, "pvscsi", "PVSCSI memory"); 41 42 #ifdef PVSCSI_DEBUG_LOGGING 43 #define DEBUG_PRINTF(level, dev, fmt, ...) \ 44 do { \ 45 if (pvscsi_log_level >= (level)) { \ 46 device_printf((dev), (fmt), ##__VA_ARGS__); \ 47 } \ 48 } while(0) 49 #else 50 #define DEBUG_PRINTF(level, dev, fmt, ...) 51 #endif /* PVSCSI_DEBUG_LOGGING */ 52 53 #define ccb_pvscsi_hcb spriv_ptr0 54 #define ccb_pvscsi_sc spriv_ptr1 55 56 struct pvscsi_softc; 57 struct pvscsi_hcb; 58 struct pvscsi_dma; 59 60 static inline uint32_t pvscsi_reg_read(struct pvscsi_softc *sc, 61 uint32_t offset); 62 static inline void pvscsi_reg_write(struct pvscsi_softc *sc, uint32_t offset, 63 uint32_t val); 64 static inline uint32_t pvscsi_read_intr_status(struct pvscsi_softc *sc); 65 static inline void pvscsi_write_intr_status(struct pvscsi_softc *sc, 66 uint32_t val); 67 static inline void pvscsi_intr_enable(struct pvscsi_softc *sc); 68 static inline void pvscsi_intr_disable(struct pvscsi_softc *sc); 69 static void pvscsi_kick_io(struct pvscsi_softc *sc, uint8_t cdb0); 70 static void pvscsi_write_cmd(struct pvscsi_softc *sc, uint32_t cmd, void *data, 71 uint32_t len); 72 static uint32_t pvscsi_get_max_targets(struct pvscsi_softc *sc); 73 static int pvscsi_setup_req_call(struct pvscsi_softc *sc, uint32_t enable); 74 static void pvscsi_setup_rings(struct pvscsi_softc *sc); 75 static void pvscsi_setup_msg_ring(struct pvscsi_softc *sc); 76 static int pvscsi_hw_supports_msg(struct pvscsi_softc *sc); 77 78 static void pvscsi_timeout(void *arg); 79 static void pvscsi_freeze(struct pvscsi_softc *sc); 80 static void pvscsi_adapter_reset(struct pvscsi_softc *sc); 81 static void pvscsi_bus_reset(struct pvscsi_softc *sc); 82 static void pvscsi_device_reset(struct pvscsi_softc *sc, uint32_t target); 83 static void pvscsi_abort(struct pvscsi_softc *sc, uint32_t target, 84 union ccb *ccb); 85 86 static void pvscsi_process_completion(struct pvscsi_softc *sc, 87 struct pvscsi_ring_cmp_desc *e); 88 static void pvscsi_process_cmp_ring(struct pvscsi_softc *sc); 89 static void pvscsi_process_msg(struct pvscsi_softc *sc, 90 struct pvscsi_ring_msg_desc *e); 91 static void pvscsi_process_msg_ring(struct pvscsi_softc *sc); 92 93 static void pvscsi_intr_locked(struct pvscsi_softc *sc); 94 static void pvscsi_intr(void *xsc); 95 static void pvscsi_poll(struct cam_sim *sim); 96 97 static void pvscsi_execute_ccb(void *arg, bus_dma_segment_t *segs, int nseg, 98 int error); 99 static void pvscsi_action(struct cam_sim *sim, union ccb *ccb); 100 101 static inline uint64_t pvscsi_hcb_to_context(struct pvscsi_softc *sc, 102 struct pvscsi_hcb *hcb); 103 static inline struct pvscsi_hcb* pvscsi_context_to_hcb(struct pvscsi_softc *sc, 104 uint64_t context); 105 static struct pvscsi_hcb * pvscsi_hcb_get(struct pvscsi_softc *sc); 106 static void pvscsi_hcb_put(struct pvscsi_softc *sc, struct pvscsi_hcb *hcb); 107 108 static void pvscsi_dma_cb(void *arg, bus_dma_segment_t *segs, int nseg, 109 int error); 110 static void pvscsi_dma_free(struct pvscsi_softc *sc, struct pvscsi_dma *dma); 111 static int pvscsi_dma_alloc(struct pvscsi_softc *sc, struct pvscsi_dma *dma, 112 bus_size_t size, bus_size_t alignment); 113 static int pvscsi_dma_alloc_ppns(struct pvscsi_softc *sc, 114 struct pvscsi_dma *dma, uint64_t *ppn_list, uint32_t num_pages); 115 static void pvscsi_dma_free_per_hcb(struct pvscsi_softc *sc, 116 uint32_t hcbs_allocated); 117 static int pvscsi_dma_alloc_per_hcb(struct pvscsi_softc *sc); 118 static void pvscsi_free_rings(struct pvscsi_softc *sc); 119 static int pvscsi_allocate_rings(struct pvscsi_softc *sc); 120 static void pvscsi_free_interrupts(struct pvscsi_softc *sc); 121 static int pvscsi_setup_interrupts(struct pvscsi_softc *sc); 122 static void pvscsi_free_all(struct pvscsi_softc *sc); 123 124 static int pvscsi_attach(device_t dev); 125 static int pvscsi_detach(device_t dev); 126 static int pvscsi_probe(device_t dev); 127 static int pvscsi_shutdown(device_t dev); 128 static int pvscsi_get_tunable(struct pvscsi_softc *sc, char *name, int value); 129 130 #ifdef PVSCSI_DEBUG_LOGGING 131 static int pvscsi_log_level = 0; 132 static SYSCTL_NODE(_hw, OID_AUTO, pvscsi, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 133 "PVSCSI driver parameters"); 134 SYSCTL_INT(_hw_pvscsi, OID_AUTO, log_level, CTLFLAG_RWTUN, &pvscsi_log_level, 135 0, "PVSCSI debug log level"); 136 #endif 137 138 static int pvscsi_request_ring_pages = 0; 139 TUNABLE_INT("hw.pvscsi.request_ring_pages", &pvscsi_request_ring_pages); 140 141 static int pvscsi_use_msg = 1; 142 TUNABLE_INT("hw.pvscsi.use_msg", &pvscsi_use_msg); 143 144 static int pvscsi_use_msi = 1; 145 TUNABLE_INT("hw.pvscsi.use_msi", &pvscsi_use_msi); 146 147 static int pvscsi_use_msix = 1; 148 TUNABLE_INT("hw.pvscsi.use_msix", &pvscsi_use_msix); 149 150 static int pvscsi_use_req_call_threshold = 1; 151 TUNABLE_INT("hw.pvscsi.use_req_call_threshold", &pvscsi_use_req_call_threshold); 152 153 static int pvscsi_max_queue_depth = 0; 154 TUNABLE_INT("hw.pvscsi.max_queue_depth", &pvscsi_max_queue_depth); 155 156 struct pvscsi_sg_list { 157 struct pvscsi_sg_element sge[PVSCSI_MAX_SG_ENTRIES_PER_SEGMENT]; 158 }; 159 160 #define PVSCSI_ABORT_TIMEOUT 2 161 #define PVSCSI_RESET_TIMEOUT 10 162 163 #define PVSCSI_HCB_NONE 0 164 #define PVSCSI_HCB_ABORT 1 165 #define PVSCSI_HCB_DEVICE_RESET 2 166 #define PVSCSI_HCB_BUS_RESET 3 167 168 struct pvscsi_hcb { 169 union ccb *ccb; 170 struct pvscsi_ring_req_desc *e; 171 int recovery; 172 SLIST_ENTRY(pvscsi_hcb) links; 173 174 struct callout callout; 175 bus_dmamap_t dma_map; 176 void *sense_buffer; 177 bus_addr_t sense_buffer_paddr; 178 struct pvscsi_sg_list *sg_list; 179 bus_addr_t sg_list_paddr; 180 }; 181 182 struct pvscsi_dma 183 { 184 bus_dma_tag_t tag; 185 bus_dmamap_t map; 186 void *vaddr; 187 bus_addr_t paddr; 188 bus_size_t size; 189 }; 190 191 struct pvscsi_softc { 192 device_t dev; 193 struct mtx lock; 194 struct cam_sim *sim; 195 struct cam_path *bus_path; 196 int frozen; 197 struct pvscsi_rings_state *rings_state; 198 struct pvscsi_ring_req_desc *req_ring; 199 struct pvscsi_ring_cmp_desc *cmp_ring; 200 struct pvscsi_ring_msg_desc *msg_ring; 201 uint32_t hcb_cnt; 202 struct pvscsi_hcb *hcbs; 203 SLIST_HEAD(, pvscsi_hcb) free_list; 204 bus_dma_tag_t parent_dmat; 205 bus_dma_tag_t buffer_dmat; 206 207 bool use_msg; 208 uint32_t max_targets; 209 int mm_rid; 210 struct resource *mm_res; 211 int irq_id; 212 struct resource *irq_res; 213 void *irq_handler; 214 int use_req_call_threshold; 215 int use_msi_or_msix; 216 217 uint64_t rings_state_ppn; 218 uint32_t req_ring_num_pages; 219 uint64_t req_ring_ppn[PVSCSI_MAX_NUM_PAGES_REQ_RING]; 220 uint32_t cmp_ring_num_pages; 221 uint64_t cmp_ring_ppn[PVSCSI_MAX_NUM_PAGES_CMP_RING]; 222 uint32_t msg_ring_num_pages; 223 uint64_t msg_ring_ppn[PVSCSI_MAX_NUM_PAGES_MSG_RING]; 224 225 struct pvscsi_dma rings_state_dma; 226 struct pvscsi_dma req_ring_dma; 227 struct pvscsi_dma cmp_ring_dma; 228 struct pvscsi_dma msg_ring_dma; 229 230 struct pvscsi_dma sg_list_dma; 231 struct pvscsi_dma sense_buffer_dma; 232 }; 233 234 static int pvscsi_get_tunable(struct pvscsi_softc *sc, char *name, int value) 235 { 236 char cfg[64]; 237 238 snprintf(cfg, sizeof(cfg), "hw.pvscsi.%d.%s", device_get_unit(sc->dev), 239 name); 240 TUNABLE_INT_FETCH(cfg, &value); 241 242 return (value); 243 } 244 245 static void 246 pvscsi_freeze(struct pvscsi_softc *sc) 247 { 248 249 if (!sc->frozen) { 250 xpt_freeze_simq(sc->sim, 1); 251 sc->frozen = 1; 252 } 253 } 254 255 static inline uint32_t 256 pvscsi_reg_read(struct pvscsi_softc *sc, uint32_t offset) 257 { 258 259 return (bus_read_4(sc->mm_res, offset)); 260 } 261 262 static inline void 263 pvscsi_reg_write(struct pvscsi_softc *sc, uint32_t offset, uint32_t val) 264 { 265 266 bus_write_4(sc->mm_res, offset, val); 267 } 268 269 static inline uint32_t 270 pvscsi_read_intr_status(struct pvscsi_softc *sc) 271 { 272 273 return (pvscsi_reg_read(sc, PVSCSI_REG_OFFSET_INTR_STATUS)); 274 } 275 276 static inline void 277 pvscsi_write_intr_status(struct pvscsi_softc *sc, uint32_t val) 278 { 279 280 pvscsi_reg_write(sc, PVSCSI_REG_OFFSET_INTR_STATUS, val); 281 } 282 283 static inline void 284 pvscsi_intr_enable(struct pvscsi_softc *sc) 285 { 286 uint32_t mask; 287 288 mask = PVSCSI_INTR_CMPL_MASK; 289 if (sc->use_msg) { 290 mask |= PVSCSI_INTR_MSG_MASK; 291 } 292 293 pvscsi_reg_write(sc, PVSCSI_REG_OFFSET_INTR_MASK, mask); 294 } 295 296 static inline void 297 pvscsi_intr_disable(struct pvscsi_softc *sc) 298 { 299 300 pvscsi_reg_write(sc, PVSCSI_REG_OFFSET_INTR_MASK, 0); 301 } 302 303 static void 304 pvscsi_kick_io(struct pvscsi_softc *sc, uint8_t cdb0) 305 { 306 struct pvscsi_rings_state *s; 307 308 if (cdb0 == READ_6 || cdb0 == READ_10 || 309 cdb0 == READ_12 || cdb0 == READ_16 || 310 cdb0 == WRITE_6 || cdb0 == WRITE_10 || 311 cdb0 == WRITE_12 || cdb0 == WRITE_16) { 312 s = sc->rings_state; 313 314 if (!sc->use_req_call_threshold || 315 (s->req_prod_idx - s->req_cons_idx) >= 316 s->req_call_threshold) { 317 pvscsi_reg_write(sc, PVSCSI_REG_OFFSET_KICK_RW_IO, 0); 318 } 319 } else { 320 pvscsi_reg_write(sc, PVSCSI_REG_OFFSET_KICK_NON_RW_IO, 0); 321 } 322 } 323 324 static void 325 pvscsi_write_cmd(struct pvscsi_softc *sc, uint32_t cmd, void *data, 326 uint32_t len) 327 { 328 uint32_t *data_ptr; 329 int i; 330 331 KASSERT(len % sizeof(uint32_t) == 0, 332 ("command size not a multiple of 4")); 333 334 data_ptr = data; 335 len /= sizeof(uint32_t); 336 337 pvscsi_reg_write(sc, PVSCSI_REG_OFFSET_COMMAND, cmd); 338 for (i = 0; i < len; ++i) { 339 pvscsi_reg_write(sc, PVSCSI_REG_OFFSET_COMMAND_DATA, 340 data_ptr[i]); 341 } 342 } 343 344 static inline uint64_t pvscsi_hcb_to_context(struct pvscsi_softc *sc, 345 struct pvscsi_hcb *hcb) 346 { 347 348 /* Offset by 1 because context must not be 0 */ 349 return (hcb - sc->hcbs + 1); 350 } 351 352 static inline struct pvscsi_hcb* pvscsi_context_to_hcb(struct pvscsi_softc *sc, 353 uint64_t context) 354 { 355 356 return (sc->hcbs + (context - 1)); 357 } 358 359 static struct pvscsi_hcb * 360 pvscsi_hcb_get(struct pvscsi_softc *sc) 361 { 362 struct pvscsi_hcb *hcb; 363 364 mtx_assert(&sc->lock, MA_OWNED); 365 366 hcb = SLIST_FIRST(&sc->free_list); 367 if (hcb) { 368 SLIST_REMOVE_HEAD(&sc->free_list, links); 369 } 370 371 return (hcb); 372 } 373 374 static void 375 pvscsi_hcb_put(struct pvscsi_softc *sc, struct pvscsi_hcb *hcb) 376 { 377 378 mtx_assert(&sc->lock, MA_OWNED); 379 hcb->ccb = NULL; 380 hcb->e = NULL; 381 hcb->recovery = PVSCSI_HCB_NONE; 382 SLIST_INSERT_HEAD(&sc->free_list, hcb, links); 383 } 384 385 static uint32_t 386 pvscsi_get_max_targets(struct pvscsi_softc *sc) 387 { 388 uint32_t max_targets; 389 390 pvscsi_write_cmd(sc, PVSCSI_CMD_GET_MAX_TARGETS, NULL, 0); 391 392 max_targets = pvscsi_reg_read(sc, PVSCSI_REG_OFFSET_COMMAND_STATUS); 393 394 if (max_targets == ~0) { 395 max_targets = 16; 396 } 397 398 return (max_targets); 399 } 400 401 static int pvscsi_setup_req_call(struct pvscsi_softc *sc, uint32_t enable) 402 { 403 uint32_t status; 404 struct pvscsi_cmd_desc_setup_req_call cmd; 405 406 if (!pvscsi_get_tunable(sc, "pvscsi_use_req_call_threshold", 407 pvscsi_use_req_call_threshold)) { 408 return (0); 409 } 410 411 pvscsi_reg_write(sc, PVSCSI_REG_OFFSET_COMMAND, 412 PVSCSI_CMD_SETUP_REQCALLTHRESHOLD); 413 status = pvscsi_reg_read(sc, PVSCSI_REG_OFFSET_COMMAND_STATUS); 414 415 if (status != -1) { 416 bzero(&cmd, sizeof(cmd)); 417 cmd.enable = enable; 418 pvscsi_write_cmd(sc, PVSCSI_CMD_SETUP_REQCALLTHRESHOLD, 419 &cmd, sizeof(cmd)); 420 status = pvscsi_reg_read(sc, PVSCSI_REG_OFFSET_COMMAND_STATUS); 421 422 return (status != 0); 423 } else { 424 return (0); 425 } 426 } 427 428 static void 429 pvscsi_dma_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 430 { 431 bus_addr_t *dest; 432 433 KASSERT(nseg == 1, ("more than one segment")); 434 435 dest = arg; 436 437 if (!error) { 438 *dest = segs->ds_addr; 439 } 440 } 441 442 static void 443 pvscsi_dma_free(struct pvscsi_softc *sc, struct pvscsi_dma *dma) 444 { 445 446 if (dma->tag != NULL) { 447 if (dma->paddr != 0) { 448 bus_dmamap_unload(dma->tag, dma->map); 449 } 450 451 if (dma->vaddr != NULL) { 452 bus_dmamem_free(dma->tag, dma->vaddr, dma->map); 453 } 454 455 bus_dma_tag_destroy(dma->tag); 456 } 457 458 bzero(dma, sizeof(*dma)); 459 } 460 461 static int 462 pvscsi_dma_alloc(struct pvscsi_softc *sc, struct pvscsi_dma *dma, 463 bus_size_t size, bus_size_t alignment) 464 { 465 int error; 466 467 bzero(dma, sizeof(*dma)); 468 469 error = bus_dma_tag_create(sc->parent_dmat, alignment, 0, 470 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, size, 1, size, 471 BUS_DMA_ALLOCNOW, NULL, NULL, &dma->tag); 472 if (error) { 473 device_printf(sc->dev, "error creating dma tag, error %d\n", 474 error); 475 goto fail; 476 } 477 478 error = bus_dmamem_alloc(dma->tag, &dma->vaddr, 479 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &dma->map); 480 if (error) { 481 device_printf(sc->dev, "error allocating dma mem, error %d\n", 482 error); 483 goto fail; 484 } 485 486 error = bus_dmamap_load(dma->tag, dma->map, dma->vaddr, size, 487 pvscsi_dma_cb, &dma->paddr, BUS_DMA_NOWAIT); 488 if (error) { 489 device_printf(sc->dev, "error mapping dma mam, error %d\n", 490 error); 491 goto fail; 492 } 493 494 dma->size = size; 495 496 fail: 497 if (error) { 498 pvscsi_dma_free(sc, dma); 499 } 500 return (error); 501 } 502 503 static int 504 pvscsi_dma_alloc_ppns(struct pvscsi_softc *sc, struct pvscsi_dma *dma, 505 uint64_t *ppn_list, uint32_t num_pages) 506 { 507 int error; 508 uint32_t i; 509 uint64_t ppn; 510 511 error = pvscsi_dma_alloc(sc, dma, num_pages * PAGE_SIZE, PAGE_SIZE); 512 if (error) { 513 device_printf(sc->dev, "Error allocating pages, error %d\n", 514 error); 515 return (error); 516 } 517 518 ppn = dma->paddr >> PAGE_SHIFT; 519 for (i = 0; i < num_pages; i++) { 520 ppn_list[i] = ppn + i; 521 } 522 523 return (0); 524 } 525 526 static void 527 pvscsi_dma_free_per_hcb(struct pvscsi_softc *sc, uint32_t hcbs_allocated) 528 { 529 int i; 530 int lock_owned; 531 struct pvscsi_hcb *hcb; 532 533 lock_owned = mtx_owned(&sc->lock); 534 535 if (lock_owned) { 536 mtx_unlock(&sc->lock); 537 } 538 for (i = 0; i < hcbs_allocated; ++i) { 539 hcb = sc->hcbs + i; 540 callout_drain(&hcb->callout); 541 }; 542 if (lock_owned) { 543 mtx_lock(&sc->lock); 544 } 545 546 for (i = 0; i < hcbs_allocated; ++i) { 547 hcb = sc->hcbs + i; 548 bus_dmamap_destroy(sc->buffer_dmat, hcb->dma_map); 549 }; 550 551 pvscsi_dma_free(sc, &sc->sense_buffer_dma); 552 pvscsi_dma_free(sc, &sc->sg_list_dma); 553 } 554 555 static int 556 pvscsi_dma_alloc_per_hcb(struct pvscsi_softc *sc) 557 { 558 int i; 559 int error; 560 struct pvscsi_hcb *hcb; 561 562 i = 0; 563 564 error = pvscsi_dma_alloc(sc, &sc->sg_list_dma, 565 sizeof(struct pvscsi_sg_list) * sc->hcb_cnt, 1); 566 if (error) { 567 device_printf(sc->dev, 568 "Error allocation sg list DMA memory, error %d\n", error); 569 goto fail; 570 } 571 572 error = pvscsi_dma_alloc(sc, &sc->sense_buffer_dma, 573 PVSCSI_SENSE_LENGTH * sc->hcb_cnt, 1); 574 if (error) { 575 device_printf(sc->dev, 576 "Error allocation sg list DMA memory, error %d\n", error); 577 goto fail; 578 } 579 580 for (i = 0; i < sc->hcb_cnt; ++i) { 581 hcb = sc->hcbs + i; 582 583 error = bus_dmamap_create(sc->buffer_dmat, 0, &hcb->dma_map); 584 if (error) { 585 device_printf(sc->dev, 586 "Error creating dma map for hcb %d, error %d\n", 587 i, error); 588 goto fail; 589 } 590 591 hcb->sense_buffer = 592 (void *)((caddr_t)sc->sense_buffer_dma.vaddr + 593 PVSCSI_SENSE_LENGTH * i); 594 hcb->sense_buffer_paddr = 595 sc->sense_buffer_dma.paddr + PVSCSI_SENSE_LENGTH * i; 596 597 hcb->sg_list = 598 (struct pvscsi_sg_list *)((caddr_t)sc->sg_list_dma.vaddr + 599 sizeof(struct pvscsi_sg_list) * i); 600 hcb->sg_list_paddr = 601 sc->sg_list_dma.paddr + sizeof(struct pvscsi_sg_list) * i; 602 603 callout_init_mtx(&hcb->callout, &sc->lock, 0); 604 } 605 606 SLIST_INIT(&sc->free_list); 607 for (i = (sc->hcb_cnt - 1); i >= 0; --i) { 608 hcb = sc->hcbs + i; 609 SLIST_INSERT_HEAD(&sc->free_list, hcb, links); 610 } 611 612 fail: 613 if (error) { 614 pvscsi_dma_free_per_hcb(sc, i); 615 } 616 617 return (error); 618 } 619 620 static void 621 pvscsi_free_rings(struct pvscsi_softc *sc) 622 { 623 624 pvscsi_dma_free(sc, &sc->rings_state_dma); 625 pvscsi_dma_free(sc, &sc->req_ring_dma); 626 pvscsi_dma_free(sc, &sc->cmp_ring_dma); 627 if (sc->use_msg) { 628 pvscsi_dma_free(sc, &sc->msg_ring_dma); 629 } 630 } 631 632 static int 633 pvscsi_allocate_rings(struct pvscsi_softc *sc) 634 { 635 int error; 636 637 error = pvscsi_dma_alloc_ppns(sc, &sc->rings_state_dma, 638 &sc->rings_state_ppn, 1); 639 if (error) { 640 device_printf(sc->dev, 641 "Error allocating rings state, error = %d\n", error); 642 goto fail; 643 } 644 sc->rings_state = sc->rings_state_dma.vaddr; 645 646 error = pvscsi_dma_alloc_ppns(sc, &sc->req_ring_dma, sc->req_ring_ppn, 647 sc->req_ring_num_pages); 648 if (error) { 649 device_printf(sc->dev, 650 "Error allocating req ring pages, error = %d\n", error); 651 goto fail; 652 } 653 sc->req_ring = sc->req_ring_dma.vaddr; 654 655 error = pvscsi_dma_alloc_ppns(sc, &sc->cmp_ring_dma, sc->cmp_ring_ppn, 656 sc->cmp_ring_num_pages); 657 if (error) { 658 device_printf(sc->dev, 659 "Error allocating cmp ring pages, error = %d\n", error); 660 goto fail; 661 } 662 sc->cmp_ring = sc->cmp_ring_dma.vaddr; 663 664 sc->msg_ring = NULL; 665 if (sc->use_msg) { 666 error = pvscsi_dma_alloc_ppns(sc, &sc->msg_ring_dma, 667 sc->msg_ring_ppn, sc->msg_ring_num_pages); 668 if (error) { 669 device_printf(sc->dev, 670 "Error allocating cmp ring pages, error = %d\n", 671 error); 672 goto fail; 673 } 674 sc->msg_ring = sc->msg_ring_dma.vaddr; 675 } 676 677 DEBUG_PRINTF(1, sc->dev, "rings_state: %p\n", sc->rings_state); 678 DEBUG_PRINTF(1, sc->dev, "req_ring: %p - %u pages\n", sc->req_ring, 679 sc->req_ring_num_pages); 680 DEBUG_PRINTF(1, sc->dev, "cmp_ring: %p - %u pages\n", sc->cmp_ring, 681 sc->cmp_ring_num_pages); 682 DEBUG_PRINTF(1, sc->dev, "msg_ring: %p - %u pages\n", sc->msg_ring, 683 sc->msg_ring_num_pages); 684 685 fail: 686 if (error) { 687 pvscsi_free_rings(sc); 688 } 689 return (error); 690 } 691 692 static void 693 pvscsi_setup_rings(struct pvscsi_softc *sc) 694 { 695 struct pvscsi_cmd_desc_setup_rings cmd; 696 uint32_t i; 697 698 bzero(&cmd, sizeof(cmd)); 699 700 cmd.rings_state_ppn = sc->rings_state_ppn; 701 702 cmd.req_ring_num_pages = sc->req_ring_num_pages; 703 for (i = 0; i < sc->req_ring_num_pages; ++i) { 704 cmd.req_ring_ppns[i] = sc->req_ring_ppn[i]; 705 } 706 707 cmd.cmp_ring_num_pages = sc->cmp_ring_num_pages; 708 for (i = 0; i < sc->cmp_ring_num_pages; ++i) { 709 cmd.cmp_ring_ppns[i] = sc->cmp_ring_ppn[i]; 710 } 711 712 pvscsi_write_cmd(sc, PVSCSI_CMD_SETUP_RINGS, &cmd, sizeof(cmd)); 713 } 714 715 static int 716 pvscsi_hw_supports_msg(struct pvscsi_softc *sc) 717 { 718 uint32_t status; 719 720 pvscsi_reg_write(sc, PVSCSI_REG_OFFSET_COMMAND, 721 PVSCSI_CMD_SETUP_MSG_RING); 722 status = pvscsi_reg_read(sc, PVSCSI_REG_OFFSET_COMMAND_STATUS); 723 724 return (status != -1); 725 } 726 727 static void 728 pvscsi_setup_msg_ring(struct pvscsi_softc *sc) 729 { 730 struct pvscsi_cmd_desc_setup_msg_ring cmd; 731 uint32_t i; 732 733 KASSERT(sc->use_msg, ("msg is not being used")); 734 735 bzero(&cmd, sizeof(cmd)); 736 737 cmd.num_pages = sc->msg_ring_num_pages; 738 for (i = 0; i < sc->msg_ring_num_pages; ++i) { 739 cmd.ring_ppns[i] = sc->msg_ring_ppn[i]; 740 } 741 742 pvscsi_write_cmd(sc, PVSCSI_CMD_SETUP_MSG_RING, &cmd, sizeof(cmd)); 743 } 744 745 static void 746 pvscsi_adapter_reset(struct pvscsi_softc *sc) 747 { 748 uint32_t val __unused; 749 750 device_printf(sc->dev, "Adapter Reset\n"); 751 752 pvscsi_write_cmd(sc, PVSCSI_CMD_ADAPTER_RESET, NULL, 0); 753 val = pvscsi_read_intr_status(sc); 754 755 DEBUG_PRINTF(2, sc->dev, "adapter reset done: %u\n", val); 756 } 757 758 static void 759 pvscsi_bus_reset(struct pvscsi_softc *sc) 760 { 761 762 device_printf(sc->dev, "Bus Reset\n"); 763 764 pvscsi_write_cmd(sc, PVSCSI_CMD_RESET_BUS, NULL, 0); 765 pvscsi_process_cmp_ring(sc); 766 767 DEBUG_PRINTF(2, sc->dev, "bus reset done\n"); 768 } 769 770 static void 771 pvscsi_device_reset(struct pvscsi_softc *sc, uint32_t target) 772 { 773 struct pvscsi_cmd_desc_reset_device cmd; 774 775 memset(&cmd, 0, sizeof(cmd)); 776 777 cmd.target = target; 778 779 device_printf(sc->dev, "Device reset for target %u\n", target); 780 781 pvscsi_write_cmd(sc, PVSCSI_CMD_RESET_DEVICE, &cmd, sizeof cmd); 782 pvscsi_process_cmp_ring(sc); 783 784 DEBUG_PRINTF(2, sc->dev, "device reset done\n"); 785 } 786 787 static void 788 pvscsi_abort(struct pvscsi_softc *sc, uint32_t target, union ccb *ccb) 789 { 790 struct pvscsi_cmd_desc_abort_cmd cmd; 791 struct pvscsi_hcb *hcb; 792 uint64_t context; 793 794 pvscsi_process_cmp_ring(sc); 795 796 hcb = ccb->ccb_h.ccb_pvscsi_hcb; 797 798 if (hcb != NULL) { 799 context = pvscsi_hcb_to_context(sc, hcb); 800 801 memset(&cmd, 0, sizeof cmd); 802 cmd.target = target; 803 cmd.context = context; 804 805 device_printf(sc->dev, "Abort for target %u context %llx\n", 806 target, (unsigned long long)context); 807 808 pvscsi_write_cmd(sc, PVSCSI_CMD_ABORT_CMD, &cmd, sizeof(cmd)); 809 pvscsi_process_cmp_ring(sc); 810 811 DEBUG_PRINTF(2, sc->dev, "abort done\n"); 812 } else { 813 DEBUG_PRINTF(1, sc->dev, 814 "Target %u ccb %p not found for abort\n", target, ccb); 815 } 816 } 817 818 static int 819 pvscsi_probe(device_t dev) 820 { 821 822 if (pci_get_vendor(dev) == PCI_VENDOR_ID_VMWARE && 823 pci_get_device(dev) == PCI_DEVICE_ID_VMWARE_PVSCSI) { 824 device_set_desc(dev, "VMware Paravirtual SCSI Controller"); 825 return (BUS_PROBE_DEFAULT); 826 } 827 return (ENXIO); 828 } 829 830 static int 831 pvscsi_shutdown(device_t dev) 832 { 833 834 return (0); 835 } 836 837 static void 838 pvscsi_timeout(void *arg) 839 { 840 struct pvscsi_hcb *hcb; 841 struct pvscsi_softc *sc; 842 union ccb *ccb; 843 844 hcb = arg; 845 ccb = hcb->ccb; 846 847 if (ccb == NULL) { 848 /* Already completed */ 849 return; 850 } 851 852 sc = ccb->ccb_h.ccb_pvscsi_sc; 853 mtx_assert(&sc->lock, MA_OWNED); 854 855 device_printf(sc->dev, "Command timed out hcb=%p ccb=%p.\n", hcb, ccb); 856 857 switch (hcb->recovery) { 858 case PVSCSI_HCB_NONE: 859 hcb->recovery = PVSCSI_HCB_ABORT; 860 pvscsi_abort(sc, ccb->ccb_h.target_id, ccb); 861 callout_reset_sbt(&hcb->callout, PVSCSI_ABORT_TIMEOUT * SBT_1S, 862 0, pvscsi_timeout, hcb, 0); 863 break; 864 case PVSCSI_HCB_ABORT: 865 hcb->recovery = PVSCSI_HCB_DEVICE_RESET; 866 pvscsi_freeze(sc); 867 pvscsi_device_reset(sc, ccb->ccb_h.target_id); 868 callout_reset_sbt(&hcb->callout, PVSCSI_RESET_TIMEOUT * SBT_1S, 869 0, pvscsi_timeout, hcb, 0); 870 break; 871 case PVSCSI_HCB_DEVICE_RESET: 872 hcb->recovery = PVSCSI_HCB_BUS_RESET; 873 pvscsi_freeze(sc); 874 pvscsi_bus_reset(sc); 875 callout_reset_sbt(&hcb->callout, PVSCSI_RESET_TIMEOUT * SBT_1S, 876 0, pvscsi_timeout, hcb, 0); 877 break; 878 case PVSCSI_HCB_BUS_RESET: 879 pvscsi_freeze(sc); 880 pvscsi_adapter_reset(sc); 881 break; 882 }; 883 } 884 885 static void 886 pvscsi_process_completion(struct pvscsi_softc *sc, 887 struct pvscsi_ring_cmp_desc *e) 888 { 889 struct pvscsi_hcb *hcb; 890 union ccb *ccb; 891 uint32_t status; 892 uint32_t btstat; 893 uint32_t sdstat; 894 bus_dmasync_op_t op; 895 896 hcb = pvscsi_context_to_hcb(sc, e->context); 897 898 callout_stop(&hcb->callout); 899 900 ccb = hcb->ccb; 901 902 btstat = e->host_status; 903 sdstat = e->scsi_status; 904 905 ccb->csio.scsi_status = sdstat; 906 ccb->csio.resid = ccb->csio.dxfer_len - e->data_len; 907 908 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) { 909 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) { 910 op = BUS_DMASYNC_POSTREAD; 911 } else { 912 op = BUS_DMASYNC_POSTWRITE; 913 } 914 bus_dmamap_sync(sc->buffer_dmat, hcb->dma_map, op); 915 bus_dmamap_unload(sc->buffer_dmat, hcb->dma_map); 916 } 917 918 if (btstat == BTSTAT_SUCCESS && sdstat == SCSI_STATUS_OK) { 919 DEBUG_PRINTF(3, sc->dev, 920 "completing command context %llx success\n", 921 (unsigned long long)e->context); 922 ccb->csio.resid = 0; 923 status = CAM_REQ_CMP; 924 } else { 925 switch (btstat) { 926 case BTSTAT_SUCCESS: 927 case BTSTAT_LINKED_COMMAND_COMPLETED: 928 case BTSTAT_LINKED_COMMAND_COMPLETED_WITH_FLAG: 929 switch (sdstat) { 930 case SCSI_STATUS_OK: 931 ccb->csio.resid = 0; 932 status = CAM_REQ_CMP; 933 break; 934 case SCSI_STATUS_CHECK_COND: 935 status = CAM_SCSI_STATUS_ERROR; 936 937 if (ccb->csio.sense_len != 0) { 938 status |= CAM_AUTOSNS_VALID; 939 940 memset(&ccb->csio.sense_data, 0, 941 sizeof(ccb->csio.sense_data)); 942 memcpy(&ccb->csio.sense_data, 943 hcb->sense_buffer, 944 MIN(ccb->csio.sense_len, 945 e->sense_len)); 946 } 947 break; 948 case SCSI_STATUS_BUSY: 949 case SCSI_STATUS_QUEUE_FULL: 950 status = CAM_REQUEUE_REQ; 951 break; 952 case SCSI_STATUS_CMD_TERMINATED: 953 case SCSI_STATUS_TASK_ABORTED: 954 status = CAM_REQ_ABORTED; 955 break; 956 default: 957 DEBUG_PRINTF(1, sc->dev, 958 "ccb: %p sdstat=0x%x\n", ccb, sdstat); 959 status = CAM_SCSI_STATUS_ERROR; 960 break; 961 } 962 break; 963 case BTSTAT_SELTIMEO: 964 status = CAM_SEL_TIMEOUT; 965 break; 966 case BTSTAT_DATARUN: 967 case BTSTAT_DATA_UNDERRUN: 968 status = CAM_DATA_RUN_ERR; 969 break; 970 case BTSTAT_ABORTQUEUE: 971 case BTSTAT_HATIMEOUT: 972 status = CAM_REQUEUE_REQ; 973 break; 974 case BTSTAT_NORESPONSE: 975 case BTSTAT_SENTRST: 976 case BTSTAT_RECVRST: 977 case BTSTAT_BUSRESET: 978 status = CAM_SCSI_BUS_RESET; 979 break; 980 case BTSTAT_SCSIPARITY: 981 status = CAM_UNCOR_PARITY; 982 break; 983 case BTSTAT_BUSFREE: 984 status = CAM_UNEXP_BUSFREE; 985 break; 986 case BTSTAT_INVPHASE: 987 status = CAM_SEQUENCE_FAIL; 988 break; 989 case BTSTAT_SENSFAILED: 990 status = CAM_AUTOSENSE_FAIL; 991 break; 992 case BTSTAT_LUNMISMATCH: 993 case BTSTAT_TAGREJECT: 994 case BTSTAT_DISCONNECT: 995 case BTSTAT_BADMSG: 996 case BTSTAT_INVPARAM: 997 status = CAM_REQ_CMP_ERR; 998 break; 999 case BTSTAT_HASOFTWARE: 1000 case BTSTAT_HAHARDWARE: 1001 status = CAM_NO_HBA; 1002 break; 1003 default: 1004 device_printf(sc->dev, "unknown hba status: 0x%x\n", 1005 btstat); 1006 status = CAM_NO_HBA; 1007 break; 1008 } 1009 1010 DEBUG_PRINTF(3, sc->dev, 1011 "completing command context %llx btstat %x sdstat %x - status %x\n", 1012 (unsigned long long)e->context, btstat, sdstat, status); 1013 } 1014 1015 ccb->ccb_h.ccb_pvscsi_hcb = NULL; 1016 ccb->ccb_h.ccb_pvscsi_sc = NULL; 1017 pvscsi_hcb_put(sc, hcb); 1018 1019 ccb->ccb_h.status = 1020 status | (ccb->ccb_h.status & ~(CAM_STATUS_MASK | CAM_SIM_QUEUED)); 1021 1022 if (sc->frozen) { 1023 ccb->ccb_h.status |= CAM_RELEASE_SIMQ; 1024 sc->frozen = 0; 1025 } 1026 1027 if (status != CAM_REQ_CMP) { 1028 ccb->ccb_h.status |= CAM_DEV_QFRZN; 1029 xpt_freeze_devq(ccb->ccb_h.path, /*count*/ 1); 1030 } 1031 xpt_done(ccb); 1032 } 1033 1034 static void 1035 pvscsi_process_cmp_ring(struct pvscsi_softc *sc) 1036 { 1037 struct pvscsi_ring_cmp_desc *ring; 1038 struct pvscsi_rings_state *s; 1039 struct pvscsi_ring_cmp_desc *e; 1040 uint32_t mask; 1041 1042 mtx_assert(&sc->lock, MA_OWNED); 1043 1044 s = sc->rings_state; 1045 ring = sc->cmp_ring; 1046 mask = MASK(s->cmp_num_entries_log2); 1047 1048 while (s->cmp_cons_idx != s->cmp_prod_idx) { 1049 e = ring + (s->cmp_cons_idx & mask); 1050 1051 pvscsi_process_completion(sc, e); 1052 1053 mb(); 1054 s->cmp_cons_idx++; 1055 } 1056 } 1057 1058 static void 1059 pvscsi_process_msg(struct pvscsi_softc *sc, struct pvscsi_ring_msg_desc *e) 1060 { 1061 struct pvscsi_ring_msg_dev_status_changed *desc; 1062 1063 union ccb *ccb; 1064 switch (e->type) { 1065 case PVSCSI_MSG_DEV_ADDED: 1066 case PVSCSI_MSG_DEV_REMOVED: { 1067 desc = (struct pvscsi_ring_msg_dev_status_changed *)e; 1068 1069 device_printf(sc->dev, "MSG: device %s at scsi%u:%u:%u\n", 1070 desc->type == PVSCSI_MSG_DEV_ADDED ? "addition" : "removal", 1071 desc->bus, desc->target, desc->lun[1]); 1072 1073 ccb = xpt_alloc_ccb_nowait(); 1074 if (ccb == NULL) { 1075 device_printf(sc->dev, 1076 "Error allocating CCB for dev change.\n"); 1077 break; 1078 } 1079 1080 if (xpt_create_path(&ccb->ccb_h.path, NULL, 1081 cam_sim_path(sc->sim), desc->target, desc->lun[1]) 1082 != CAM_REQ_CMP) { 1083 device_printf(sc->dev, 1084 "Error creating path for dev change.\n"); 1085 xpt_free_ccb(ccb); 1086 break; 1087 } 1088 1089 xpt_rescan(ccb); 1090 } break; 1091 default: 1092 device_printf(sc->dev, "Unknown msg type 0x%x\n", e->type); 1093 }; 1094 } 1095 1096 static void 1097 pvscsi_process_msg_ring(struct pvscsi_softc *sc) 1098 { 1099 struct pvscsi_ring_msg_desc *ring; 1100 struct pvscsi_rings_state *s; 1101 struct pvscsi_ring_msg_desc *e; 1102 uint32_t mask; 1103 1104 mtx_assert(&sc->lock, MA_OWNED); 1105 1106 s = sc->rings_state; 1107 ring = sc->msg_ring; 1108 mask = MASK(s->msg_num_entries_log2); 1109 1110 while (s->msg_cons_idx != s->msg_prod_idx) { 1111 e = ring + (s->msg_cons_idx & mask); 1112 1113 pvscsi_process_msg(sc, e); 1114 1115 mb(); 1116 s->msg_cons_idx++; 1117 } 1118 } 1119 1120 static void 1121 pvscsi_intr_locked(struct pvscsi_softc *sc) 1122 { 1123 uint32_t val; 1124 1125 mtx_assert(&sc->lock, MA_OWNED); 1126 1127 val = pvscsi_read_intr_status(sc); 1128 1129 if ((val & PVSCSI_INTR_ALL_SUPPORTED) != 0) { 1130 pvscsi_write_intr_status(sc, val & PVSCSI_INTR_ALL_SUPPORTED); 1131 pvscsi_process_cmp_ring(sc); 1132 if (sc->use_msg) { 1133 pvscsi_process_msg_ring(sc); 1134 } 1135 } 1136 } 1137 1138 static void 1139 pvscsi_intr(void *xsc) 1140 { 1141 struct pvscsi_softc *sc; 1142 1143 sc = xsc; 1144 1145 mtx_assert(&sc->lock, MA_NOTOWNED); 1146 1147 mtx_lock(&sc->lock); 1148 pvscsi_intr_locked(xsc); 1149 mtx_unlock(&sc->lock); 1150 } 1151 1152 static void 1153 pvscsi_poll(struct cam_sim *sim) 1154 { 1155 struct pvscsi_softc *sc; 1156 1157 sc = cam_sim_softc(sim); 1158 1159 mtx_assert(&sc->lock, MA_OWNED); 1160 pvscsi_intr_locked(sc); 1161 } 1162 1163 static void 1164 pvscsi_execute_ccb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1165 { 1166 struct pvscsi_hcb *hcb; 1167 struct pvscsi_ring_req_desc *e; 1168 union ccb *ccb; 1169 struct pvscsi_softc *sc; 1170 struct pvscsi_rings_state *s; 1171 uint8_t cdb0; 1172 bus_dmasync_op_t op; 1173 1174 hcb = arg; 1175 ccb = hcb->ccb; 1176 e = hcb->e; 1177 sc = ccb->ccb_h.ccb_pvscsi_sc; 1178 s = sc->rings_state; 1179 1180 mtx_assert(&sc->lock, MA_OWNED); 1181 1182 if (error) { 1183 device_printf(sc->dev, "pvscsi_execute_ccb error %d\n", error); 1184 1185 if (error == EFBIG) { 1186 ccb->ccb_h.status = CAM_REQ_TOO_BIG; 1187 } else { 1188 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1189 } 1190 1191 pvscsi_hcb_put(sc, hcb); 1192 xpt_done(ccb); 1193 return; 1194 } 1195 1196 e->flags = 0; 1197 op = 0; 1198 switch (ccb->ccb_h.flags & CAM_DIR_MASK) { 1199 case CAM_DIR_NONE: 1200 e->flags |= PVSCSI_FLAG_CMD_DIR_NONE; 1201 break; 1202 case CAM_DIR_IN: 1203 e->flags |= PVSCSI_FLAG_CMD_DIR_TOHOST; 1204 op = BUS_DMASYNC_PREREAD; 1205 break; 1206 case CAM_DIR_OUT: 1207 e->flags |= PVSCSI_FLAG_CMD_DIR_TODEVICE; 1208 op = BUS_DMASYNC_PREWRITE; 1209 break; 1210 case CAM_DIR_BOTH: 1211 /* TODO: does this need handling? */ 1212 break; 1213 } 1214 1215 if (nseg != 0) { 1216 if (nseg > 1) { 1217 int i; 1218 struct pvscsi_sg_element *sge; 1219 1220 KASSERT(nseg <= PVSCSI_MAX_SG_ENTRIES_PER_SEGMENT, 1221 ("too many sg segments")); 1222 1223 sge = hcb->sg_list->sge; 1224 e->flags |= PVSCSI_FLAG_CMD_WITH_SG_LIST; 1225 1226 for (i = 0; i < nseg; ++i) { 1227 sge[i].addr = segs[i].ds_addr; 1228 sge[i].length = segs[i].ds_len; 1229 sge[i].flags = 0; 1230 } 1231 1232 e->data_addr = hcb->sg_list_paddr; 1233 } else { 1234 e->data_addr = segs->ds_addr; 1235 } 1236 1237 bus_dmamap_sync(sc->buffer_dmat, hcb->dma_map, op); 1238 } else { 1239 e->data_addr = 0; 1240 } 1241 1242 cdb0 = e->cdb[0]; 1243 ccb->ccb_h.status |= CAM_SIM_QUEUED; 1244 1245 if (ccb->ccb_h.timeout != CAM_TIME_INFINITY) { 1246 callout_reset_sbt(&hcb->callout, ccb->ccb_h.timeout * SBT_1MS, 1247 0, pvscsi_timeout, hcb, 0); 1248 } 1249 1250 mb(); 1251 s->req_prod_idx++; 1252 pvscsi_kick_io(sc, cdb0); 1253 } 1254 1255 static void 1256 pvscsi_action(struct cam_sim *sim, union ccb *ccb) 1257 { 1258 struct pvscsi_softc *sc; 1259 struct ccb_hdr *ccb_h; 1260 1261 sc = cam_sim_softc(sim); 1262 ccb_h = &ccb->ccb_h; 1263 1264 mtx_assert(&sc->lock, MA_OWNED); 1265 1266 switch (ccb_h->func_code) { 1267 case XPT_SCSI_IO: 1268 { 1269 struct ccb_scsiio *csio; 1270 uint32_t req_num_entries_log2; 1271 struct pvscsi_ring_req_desc *ring; 1272 struct pvscsi_ring_req_desc *e; 1273 struct pvscsi_rings_state *s; 1274 struct pvscsi_hcb *hcb; 1275 1276 csio = &ccb->csio; 1277 ring = sc->req_ring; 1278 s = sc->rings_state; 1279 1280 hcb = NULL; 1281 1282 /* 1283 * Check if it was completed already (such as aborted 1284 * by upper layers) 1285 */ 1286 if ((ccb_h->status & CAM_STATUS_MASK) != CAM_REQ_INPROG) { 1287 xpt_done(ccb); 1288 return; 1289 } 1290 1291 req_num_entries_log2 = s->req_num_entries_log2; 1292 1293 if (s->req_prod_idx - s->cmp_cons_idx >= 1294 (1 << req_num_entries_log2)) { 1295 device_printf(sc->dev, 1296 "Not enough room on completion ring.\n"); 1297 pvscsi_freeze(sc); 1298 ccb_h->status = CAM_REQUEUE_REQ; 1299 goto finish_ccb; 1300 } 1301 1302 hcb = pvscsi_hcb_get(sc); 1303 if (hcb == NULL) { 1304 device_printf(sc->dev, "No free hcbs.\n"); 1305 pvscsi_freeze(sc); 1306 ccb_h->status = CAM_REQUEUE_REQ; 1307 goto finish_ccb; 1308 } 1309 1310 hcb->ccb = ccb; 1311 ccb_h->ccb_pvscsi_hcb = hcb; 1312 ccb_h->ccb_pvscsi_sc = sc; 1313 1314 if (csio->cdb_len > sizeof(e->cdb)) { 1315 DEBUG_PRINTF(2, sc->dev, "cdb length %u too large\n", 1316 csio->cdb_len); 1317 ccb_h->status = CAM_REQ_INVALID; 1318 goto finish_ccb; 1319 } 1320 1321 if (ccb_h->flags & CAM_CDB_PHYS) { 1322 DEBUG_PRINTF(2, sc->dev, 1323 "CAM_CDB_PHYS not implemented\n"); 1324 ccb_h->status = CAM_REQ_INVALID; 1325 goto finish_ccb; 1326 } 1327 1328 e = ring + (s->req_prod_idx & MASK(req_num_entries_log2)); 1329 1330 e->bus = cam_sim_bus(sim); 1331 e->target = ccb_h->target_id; 1332 memset(e->lun, 0, sizeof(e->lun)); 1333 e->lun[1] = ccb_h->target_lun; 1334 e->data_addr = 0; 1335 e->data_len = csio->dxfer_len; 1336 e->vcpu_hint = curcpu; 1337 1338 e->cdb_len = csio->cdb_len; 1339 memcpy(e->cdb, scsiio_cdb_ptr(csio), csio->cdb_len); 1340 1341 e->sense_addr = 0; 1342 e->sense_len = csio->sense_len; 1343 if (e->sense_len > 0) { 1344 e->sense_addr = hcb->sense_buffer_paddr; 1345 } 1346 1347 e->tag = MSG_SIMPLE_Q_TAG; 1348 if (ccb_h->flags & CAM_TAG_ACTION_VALID) { 1349 e->tag = csio->tag_action; 1350 } 1351 1352 e->context = pvscsi_hcb_to_context(sc, hcb); 1353 hcb->e = e; 1354 1355 DEBUG_PRINTF(3, sc->dev, 1356 " queuing command %02x context %llx\n", e->cdb[0], 1357 (unsigned long long)e->context); 1358 bus_dmamap_load_ccb(sc->buffer_dmat, hcb->dma_map, ccb, 1359 pvscsi_execute_ccb, hcb, 0); 1360 break; 1361 1362 finish_ccb: 1363 if (hcb != NULL) { 1364 pvscsi_hcb_put(sc, hcb); 1365 } 1366 xpt_done(ccb); 1367 } break; 1368 case XPT_ABORT: 1369 { 1370 struct pvscsi_hcb *abort_hcb; 1371 union ccb *abort_ccb; 1372 1373 abort_ccb = ccb->cab.abort_ccb; 1374 abort_hcb = abort_ccb->ccb_h.ccb_pvscsi_hcb; 1375 1376 if (abort_hcb->ccb != NULL && abort_hcb->ccb == abort_ccb) { 1377 if (abort_ccb->ccb_h.func_code == XPT_SCSI_IO) { 1378 pvscsi_abort(sc, ccb_h->target_id, abort_ccb); 1379 ccb_h->status = CAM_REQ_CMP; 1380 } else { 1381 ccb_h->status = CAM_UA_ABORT; 1382 } 1383 } else { 1384 device_printf(sc->dev, 1385 "Could not find hcb for ccb %p (tgt %u)\n", 1386 ccb, ccb_h->target_id); 1387 ccb_h->status = CAM_REQ_CMP; 1388 } 1389 xpt_done(ccb); 1390 } break; 1391 case XPT_RESET_DEV: 1392 { 1393 pvscsi_device_reset(sc, ccb_h->target_id); 1394 ccb_h->status = CAM_REQ_CMP; 1395 xpt_done(ccb); 1396 } break; 1397 case XPT_RESET_BUS: 1398 { 1399 pvscsi_bus_reset(sc); 1400 ccb_h->status = CAM_REQ_CMP; 1401 xpt_done(ccb); 1402 } break; 1403 case XPT_PATH_INQ: 1404 { 1405 struct ccb_pathinq *cpi; 1406 1407 cpi = &ccb->cpi; 1408 1409 cpi->version_num = 1; 1410 cpi->hba_inquiry = PI_TAG_ABLE; 1411 cpi->target_sprt = 0; 1412 cpi->hba_misc = PIM_NOBUSRESET | PIM_UNMAPPED; 1413 cpi->hba_eng_cnt = 0; 1414 /* cpi->vuhba_flags = 0; */ 1415 cpi->max_target = sc->max_targets; 1416 cpi->max_lun = 0; 1417 cpi->async_flags = 0; 1418 cpi->hpath_id = 0; 1419 cpi->unit_number = cam_sim_unit(sim); 1420 cpi->bus_id = cam_sim_bus(sim); 1421 cpi->initiator_id = 7; 1422 cpi->base_transfer_speed = 750000; 1423 strlcpy(cpi->sim_vid, "VMware", SIM_IDLEN); 1424 strlcpy(cpi->hba_vid, "VMware", HBA_IDLEN); 1425 strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); 1426 /* Limit I/O to 256k since we can't do 512k unaligned I/O */ 1427 cpi->maxio = (PVSCSI_MAX_SG_ENTRIES_PER_SEGMENT / 2) * PAGE_SIZE; 1428 cpi->protocol = PROTO_SCSI; 1429 cpi->protocol_version = SCSI_REV_SPC2; 1430 cpi->transport = XPORT_SAS; 1431 cpi->transport_version = 0; 1432 1433 ccb_h->status = CAM_REQ_CMP; 1434 xpt_done(ccb); 1435 } break; 1436 case XPT_GET_TRAN_SETTINGS: 1437 { 1438 struct ccb_trans_settings *cts; 1439 1440 cts = &ccb->cts; 1441 1442 cts->protocol = PROTO_SCSI; 1443 cts->protocol_version = SCSI_REV_SPC2; 1444 cts->transport = XPORT_SAS; 1445 cts->transport_version = 0; 1446 1447 cts->proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB; 1448 cts->proto_specific.scsi.valid = CTS_SCSI_VALID_TQ; 1449 1450 ccb_h->status = CAM_REQ_CMP; 1451 xpt_done(ccb); 1452 } break; 1453 case XPT_CALC_GEOMETRY: 1454 { 1455 cam_calc_geometry(&ccb->ccg, 1); 1456 xpt_done(ccb); 1457 } break; 1458 default: 1459 ccb_h->status = CAM_REQ_INVALID; 1460 xpt_done(ccb); 1461 break; 1462 } 1463 } 1464 1465 static void 1466 pvscsi_free_interrupts(struct pvscsi_softc *sc) 1467 { 1468 1469 if (sc->irq_handler != NULL) { 1470 bus_teardown_intr(sc->dev, sc->irq_res, sc->irq_handler); 1471 } 1472 if (sc->irq_res != NULL) { 1473 bus_release_resource(sc->dev, SYS_RES_IRQ, sc->irq_id, 1474 sc->irq_res); 1475 } 1476 if (sc->use_msi_or_msix) { 1477 pci_release_msi(sc->dev); 1478 } 1479 } 1480 1481 static int 1482 pvscsi_setup_interrupts(struct pvscsi_softc *sc) 1483 { 1484 int error; 1485 int flags; 1486 int use_msix; 1487 int use_msi; 1488 int count; 1489 1490 sc->use_msi_or_msix = 0; 1491 1492 use_msix = pvscsi_get_tunable(sc, "use_msix", pvscsi_use_msix); 1493 use_msi = pvscsi_get_tunable(sc, "use_msi", pvscsi_use_msi); 1494 1495 if (use_msix && pci_msix_count(sc->dev) > 0) { 1496 count = 1; 1497 if (pci_alloc_msix(sc->dev, &count) == 0 && count == 1) { 1498 sc->use_msi_or_msix = 1; 1499 device_printf(sc->dev, "Interrupt: MSI-X\n"); 1500 } else { 1501 pci_release_msi(sc->dev); 1502 } 1503 } 1504 1505 if (sc->use_msi_or_msix == 0 && use_msi && pci_msi_count(sc->dev) > 0) { 1506 count = 1; 1507 if (pci_alloc_msi(sc->dev, &count) == 0 && count == 1) { 1508 sc->use_msi_or_msix = 1; 1509 device_printf(sc->dev, "Interrupt: MSI\n"); 1510 } else { 1511 pci_release_msi(sc->dev); 1512 } 1513 } 1514 1515 flags = RF_ACTIVE; 1516 if (sc->use_msi_or_msix) { 1517 sc->irq_id = 1; 1518 } else { 1519 device_printf(sc->dev, "Interrupt: INT\n"); 1520 sc->irq_id = 0; 1521 flags |= RF_SHAREABLE; 1522 } 1523 1524 sc->irq_res = bus_alloc_resource_any(sc->dev, SYS_RES_IRQ, &sc->irq_id, 1525 flags); 1526 if (sc->irq_res == NULL) { 1527 device_printf(sc->dev, "IRQ allocation failed\n"); 1528 if (sc->use_msi_or_msix) { 1529 pci_release_msi(sc->dev); 1530 } 1531 return (ENXIO); 1532 } 1533 1534 error = bus_setup_intr(sc->dev, sc->irq_res, 1535 INTR_TYPE_CAM | INTR_MPSAFE, NULL, pvscsi_intr, sc, 1536 &sc->irq_handler); 1537 if (error) { 1538 device_printf(sc->dev, "IRQ handler setup failed\n"); 1539 pvscsi_free_interrupts(sc); 1540 return (error); 1541 } 1542 1543 return (0); 1544 } 1545 1546 static void 1547 pvscsi_free_all(struct pvscsi_softc *sc) 1548 { 1549 1550 if (sc->sim) { 1551 int error; 1552 1553 if (sc->bus_path) { 1554 xpt_free_path(sc->bus_path); 1555 } 1556 1557 error = xpt_bus_deregister(cam_sim_path(sc->sim)); 1558 if (error != 0) { 1559 device_printf(sc->dev, 1560 "Error deregistering bus, error %d\n", error); 1561 } 1562 1563 cam_sim_free(sc->sim, TRUE); 1564 } 1565 1566 pvscsi_dma_free_per_hcb(sc, sc->hcb_cnt); 1567 1568 if (sc->hcbs) { 1569 free(sc->hcbs, M_PVSCSI); 1570 } 1571 1572 pvscsi_free_rings(sc); 1573 1574 pvscsi_free_interrupts(sc); 1575 1576 if (sc->buffer_dmat != NULL) { 1577 bus_dma_tag_destroy(sc->buffer_dmat); 1578 } 1579 1580 if (sc->parent_dmat != NULL) { 1581 bus_dma_tag_destroy(sc->parent_dmat); 1582 } 1583 1584 if (sc->mm_res != NULL) { 1585 bus_release_resource(sc->dev, SYS_RES_MEMORY, sc->mm_rid, 1586 sc->mm_res); 1587 } 1588 } 1589 1590 static int 1591 pvscsi_attach(device_t dev) 1592 { 1593 struct pvscsi_softc *sc; 1594 int rid; 1595 int barid; 1596 int error; 1597 int max_queue_depth; 1598 int adapter_queue_size; 1599 struct cam_devq *devq; 1600 1601 sc = device_get_softc(dev); 1602 sc->dev = dev; 1603 1604 mtx_init(&sc->lock, "pvscsi", NULL, MTX_DEF); 1605 1606 pci_enable_busmaster(dev); 1607 1608 sc->mm_rid = -1; 1609 for (barid = 0; barid <= PCIR_MAX_BAR_0; ++barid) { 1610 rid = PCIR_BAR(barid); 1611 1612 sc->mm_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 1613 RF_ACTIVE); 1614 if (sc->mm_res != NULL) { 1615 sc->mm_rid = rid; 1616 break; 1617 } 1618 } 1619 1620 if (sc->mm_res == NULL) { 1621 device_printf(dev, "could not map device memory\n"); 1622 return (ENXIO); 1623 } 1624 1625 error = bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0, 1626 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, BUS_SPACE_MAXSIZE, 1627 BUS_SPACE_UNRESTRICTED, BUS_SPACE_MAXSIZE, 0, NULL, NULL, 1628 &sc->parent_dmat); 1629 if (error) { 1630 device_printf(dev, "parent dma tag create failure, error %d\n", 1631 error); 1632 pvscsi_free_all(sc); 1633 return (ENXIO); 1634 } 1635 1636 error = bus_dma_tag_create(sc->parent_dmat, 1, 0, 1637 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 1638 PVSCSI_MAX_SG_ENTRIES_PER_SEGMENT * PAGE_SIZE, 1639 PVSCSI_MAX_SG_ENTRIES_PER_SEGMENT, PAGE_SIZE, BUS_DMA_ALLOCNOW, 1640 NULL, NULL, &sc->buffer_dmat); 1641 if (error) { 1642 device_printf(dev, "parent dma tag create failure, error %d\n", 1643 error); 1644 pvscsi_free_all(sc); 1645 return (ENXIO); 1646 } 1647 1648 error = pvscsi_setup_interrupts(sc); 1649 if (error) { 1650 device_printf(dev, "Interrupt setup failed\n"); 1651 pvscsi_free_all(sc); 1652 return (error); 1653 } 1654 1655 sc->max_targets = pvscsi_get_max_targets(sc); 1656 1657 sc->use_msg = pvscsi_get_tunable(sc, "use_msg", pvscsi_use_msg) && 1658 pvscsi_hw_supports_msg(sc); 1659 sc->msg_ring_num_pages = sc->use_msg ? 1 : 0; 1660 1661 sc->req_ring_num_pages = pvscsi_get_tunable(sc, "request_ring_pages", 1662 pvscsi_request_ring_pages); 1663 if (sc->req_ring_num_pages <= 0) { 1664 if (sc->max_targets <= 16) { 1665 sc->req_ring_num_pages = 1666 PVSCSI_DEFAULT_NUM_PAGES_REQ_RING; 1667 } else { 1668 sc->req_ring_num_pages = PVSCSI_MAX_NUM_PAGES_REQ_RING; 1669 } 1670 } else if (sc->req_ring_num_pages > PVSCSI_MAX_NUM_PAGES_REQ_RING) { 1671 sc->req_ring_num_pages = PVSCSI_MAX_NUM_PAGES_REQ_RING; 1672 } 1673 sc->cmp_ring_num_pages = sc->req_ring_num_pages; 1674 1675 max_queue_depth = pvscsi_get_tunable(sc, "max_queue_depth", 1676 pvscsi_max_queue_depth); 1677 1678 adapter_queue_size = (sc->req_ring_num_pages * PAGE_SIZE) / 1679 sizeof(struct pvscsi_ring_req_desc); 1680 if (max_queue_depth > 0) { 1681 adapter_queue_size = MIN(adapter_queue_size, max_queue_depth); 1682 } 1683 adapter_queue_size = MIN(adapter_queue_size, 1684 PVSCSI_MAX_REQ_QUEUE_DEPTH); 1685 1686 device_printf(sc->dev, "Use Msg: %d\n", sc->use_msg); 1687 device_printf(sc->dev, "REQ num pages: %d\n", sc->req_ring_num_pages); 1688 device_printf(sc->dev, "CMP num pages: %d\n", sc->cmp_ring_num_pages); 1689 device_printf(sc->dev, "MSG num pages: %d\n", sc->msg_ring_num_pages); 1690 device_printf(sc->dev, "Queue size: %d\n", adapter_queue_size); 1691 1692 if (pvscsi_allocate_rings(sc)) { 1693 device_printf(dev, "ring allocation failed\n"); 1694 pvscsi_free_all(sc); 1695 return (ENXIO); 1696 } 1697 1698 sc->hcb_cnt = adapter_queue_size; 1699 sc->hcbs = malloc(sc->hcb_cnt * sizeof(*sc->hcbs), M_PVSCSI, 1700 M_NOWAIT | M_ZERO); 1701 if (sc->hcbs == NULL) { 1702 device_printf(dev, "error allocating hcb array\n"); 1703 pvscsi_free_all(sc); 1704 return (ENXIO); 1705 } 1706 1707 if (pvscsi_dma_alloc_per_hcb(sc)) { 1708 device_printf(dev, "error allocating per hcb dma memory\n"); 1709 pvscsi_free_all(sc); 1710 return (ENXIO); 1711 } 1712 1713 pvscsi_adapter_reset(sc); 1714 1715 devq = cam_simq_alloc(adapter_queue_size); 1716 if (devq == NULL) { 1717 device_printf(dev, "cam devq alloc failed\n"); 1718 pvscsi_free_all(sc); 1719 return (ENXIO); 1720 } 1721 1722 sc->sim = cam_sim_alloc(pvscsi_action, pvscsi_poll, "pvscsi", sc, 1723 device_get_unit(dev), &sc->lock, 1, adapter_queue_size, devq); 1724 if (sc->sim == NULL) { 1725 device_printf(dev, "cam sim alloc failed\n"); 1726 cam_simq_free(devq); 1727 pvscsi_free_all(sc); 1728 return (ENXIO); 1729 } 1730 1731 mtx_lock(&sc->lock); 1732 1733 if (xpt_bus_register(sc->sim, dev, 0) != CAM_SUCCESS) { 1734 device_printf(dev, "xpt bus register failed\n"); 1735 pvscsi_free_all(sc); 1736 mtx_unlock(&sc->lock); 1737 return (ENXIO); 1738 } 1739 1740 if (xpt_create_path(&sc->bus_path, NULL, cam_sim_path(sc->sim), 1741 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 1742 device_printf(dev, "xpt create path failed\n"); 1743 pvscsi_free_all(sc); 1744 mtx_unlock(&sc->lock); 1745 return (ENXIO); 1746 } 1747 1748 pvscsi_setup_rings(sc); 1749 if (sc->use_msg) { 1750 pvscsi_setup_msg_ring(sc); 1751 } 1752 1753 sc->use_req_call_threshold = pvscsi_setup_req_call(sc, 1); 1754 1755 pvscsi_intr_enable(sc); 1756 1757 mtx_unlock(&sc->lock); 1758 1759 return (0); 1760 } 1761 1762 static int 1763 pvscsi_detach(device_t dev) 1764 { 1765 struct pvscsi_softc *sc; 1766 1767 sc = device_get_softc(dev); 1768 1769 pvscsi_intr_disable(sc); 1770 pvscsi_adapter_reset(sc); 1771 1772 if (sc->irq_handler != NULL) { 1773 bus_teardown_intr(dev, sc->irq_res, sc->irq_handler); 1774 } 1775 1776 mtx_lock(&sc->lock); 1777 pvscsi_free_all(sc); 1778 mtx_unlock(&sc->lock); 1779 1780 mtx_destroy(&sc->lock); 1781 1782 return (0); 1783 } 1784 1785 static device_method_t pvscsi_methods[] = { 1786 DEVMETHOD(device_probe, pvscsi_probe), 1787 DEVMETHOD(device_shutdown, pvscsi_shutdown), 1788 DEVMETHOD(device_attach, pvscsi_attach), 1789 DEVMETHOD(device_detach, pvscsi_detach), 1790 DEVMETHOD_END 1791 }; 1792 1793 static driver_t pvscsi_driver = { 1794 "pvscsi", pvscsi_methods, sizeof(struct pvscsi_softc) 1795 }; 1796 1797 DRIVER_MODULE(pvscsi, pci, pvscsi_driver, 0, 0); 1798 1799 MODULE_DEPEND(pvscsi, pci, 1, 1, 1); 1800 MODULE_DEPEND(pvscsi, cam, 1, 1, 1);
Cache object: c66066a8dda0f6b9cb5b108c2e35e352
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