1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (C) 2012-2014 Intel Corporation 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef __NVME_PRIVATE_H__ 32 #define __NVME_PRIVATE_H__ 33 34 #include <sys/param.h> 35 #include <sys/bio.h> 36 #include <sys/bus.h> 37 #include <sys/kernel.h> 38 #include <sys/lock.h> 39 #include <sys/malloc.h> 40 #include <sys/module.h> 41 #include <sys/mutex.h> 42 #include <sys/rman.h> 43 #include <sys/systm.h> 44 #include <sys/taskqueue.h> 45 46 #include <vm/uma.h> 47 48 #include <machine/bus.h> 49 50 #include "nvme.h" 51 52 #define DEVICE2SOFTC(dev) ((struct nvme_controller *) device_get_softc(dev)) 53 54 MALLOC_DECLARE(M_NVME); 55 56 #define IDT32_PCI_ID 0x80d0111d /* 32 channel board */ 57 #define IDT8_PCI_ID 0x80d2111d /* 8 channel board */ 58 59 /* 60 * For commands requiring more than 2 PRP entries, one PRP will be 61 * embedded in the command (prp1), and the rest of the PRP entries 62 * will be in a list pointed to by the command (prp2). This means 63 * that real max number of PRP entries we support is 32+1, which 64 * results in a max xfer size of 32*PAGE_SIZE. 65 */ 66 #define NVME_MAX_PRP_LIST_ENTRIES (NVME_MAX_XFER_SIZE / PAGE_SIZE) 67 68 #define NVME_ADMIN_TRACKERS (16) 69 #define NVME_ADMIN_ENTRIES (128) 70 /* min and max are defined in admin queue attributes section of spec */ 71 #define NVME_MIN_ADMIN_ENTRIES (2) 72 #define NVME_MAX_ADMIN_ENTRIES (4096) 73 74 /* 75 * NVME_IO_ENTRIES defines the size of an I/O qpair's submission and completion 76 * queues, while NVME_IO_TRACKERS defines the maximum number of I/O that we 77 * will allow outstanding on an I/O qpair at any time. The only advantage in 78 * having IO_ENTRIES > IO_TRACKERS is for debugging purposes - when dumping 79 * the contents of the submission and completion queues, it will show a longer 80 * history of data. 81 */ 82 #define NVME_IO_ENTRIES (256) 83 #define NVME_IO_TRACKERS (128) 84 #define NVME_MIN_IO_TRACKERS (4) 85 #define NVME_MAX_IO_TRACKERS (1024) 86 87 /* 88 * NVME_MAX_IO_ENTRIES is not defined, since it is specified in CC.MQES 89 * for each controller. 90 */ 91 92 #define NVME_INT_COAL_TIME (0) /* disabled */ 93 #define NVME_INT_COAL_THRESHOLD (0) /* 0-based */ 94 95 #define NVME_MAX_NAMESPACES (16) 96 #define NVME_MAX_CONSUMERS (2) 97 #define NVME_MAX_ASYNC_EVENTS (8) 98 99 #define NVME_DEFAULT_TIMEOUT_PERIOD (30) /* in seconds */ 100 #define NVME_MIN_TIMEOUT_PERIOD (5) 101 #define NVME_MAX_TIMEOUT_PERIOD (120) 102 103 #define NVME_DEFAULT_RETRY_COUNT (4) 104 105 /* Maximum log page size to fetch for AERs. */ 106 #define NVME_MAX_AER_LOG_SIZE (4096) 107 108 /* 109 * Define CACHE_LINE_SIZE here for older FreeBSD versions that do not define 110 * it. 111 */ 112 #ifndef CACHE_LINE_SIZE 113 #define CACHE_LINE_SIZE (64) 114 #endif 115 116 extern uma_zone_t nvme_request_zone; 117 extern int32_t nvme_retry_count; 118 extern bool nvme_verbose_cmd_dump; 119 120 struct nvme_completion_poll_status { 121 122 struct nvme_completion cpl; 123 int done; 124 }; 125 126 extern devclass_t nvme_devclass; 127 128 #define NVME_REQUEST_VADDR 1 129 #define NVME_REQUEST_NULL 2 /* For requests with no payload. */ 130 #define NVME_REQUEST_UIO 3 131 #define NVME_REQUEST_BIO 4 132 #define NVME_REQUEST_CCB 5 133 134 struct nvme_request { 135 136 struct nvme_command cmd; 137 struct nvme_qpair *qpair; 138 union { 139 void *payload; 140 struct bio *bio; 141 } u; 142 uint32_t type; 143 uint32_t payload_size; 144 boolean_t timeout; 145 nvme_cb_fn_t cb_fn; 146 void *cb_arg; 147 int32_t retries; 148 STAILQ_ENTRY(nvme_request) stailq; 149 }; 150 151 struct nvme_async_event_request { 152 153 struct nvme_controller *ctrlr; 154 struct nvme_request *req; 155 struct nvme_completion cpl; 156 uint32_t log_page_id; 157 uint32_t log_page_size; 158 uint8_t log_page_buffer[NVME_MAX_AER_LOG_SIZE]; 159 }; 160 161 struct nvme_tracker { 162 163 TAILQ_ENTRY(nvme_tracker) tailq; 164 struct nvme_request *req; 165 struct nvme_qpair *qpair; 166 struct callout timer; 167 bus_dmamap_t payload_dma_map; 168 uint16_t cid; 169 170 uint64_t *prp; 171 bus_addr_t prp_bus_addr; 172 }; 173 174 struct nvme_qpair { 175 176 struct nvme_controller *ctrlr; 177 uint32_t id; 178 uint32_t phase; 179 180 uint16_t vector; 181 int rid; 182 struct resource *res; 183 void *tag; 184 185 uint32_t num_entries; 186 uint32_t num_trackers; 187 uint32_t sq_tdbl_off; 188 uint32_t cq_hdbl_off; 189 190 uint32_t sq_head; 191 uint32_t sq_tail; 192 uint32_t cq_head; 193 194 int64_t num_cmds; 195 int64_t num_intr_handler_calls; 196 int64_t num_retries; 197 int64_t num_failures; 198 199 struct nvme_command *cmd; 200 struct nvme_completion *cpl; 201 202 bus_dma_tag_t dma_tag; 203 bus_dma_tag_t dma_tag_payload; 204 205 bus_dmamap_t queuemem_map; 206 uint64_t cmd_bus_addr; 207 uint64_t cpl_bus_addr; 208 209 TAILQ_HEAD(, nvme_tracker) free_tr; 210 TAILQ_HEAD(, nvme_tracker) outstanding_tr; 211 STAILQ_HEAD(, nvme_request) queued_req; 212 213 struct nvme_tracker **act_tr; 214 215 boolean_t is_enabled; 216 217 struct mtx lock __aligned(CACHE_LINE_SIZE); 218 219 } __aligned(CACHE_LINE_SIZE); 220 221 struct nvme_namespace { 222 223 struct nvme_controller *ctrlr; 224 struct nvme_namespace_data data; 225 uint32_t id; 226 uint32_t flags; 227 struct cdev *cdev; 228 void *cons_cookie[NVME_MAX_CONSUMERS]; 229 uint32_t boundary; 230 struct mtx lock; 231 }; 232 233 /* 234 * One of these per allocated PCI device. 235 */ 236 struct nvme_controller { 237 238 device_t dev; 239 240 struct mtx lock; 241 242 uint32_t ready_timeout_in_ms; 243 uint32_t quirks; 244 #define QUIRK_DELAY_B4_CHK_RDY 1 /* Can't touch MMIO on disable */ 245 #define QUIRK_DISABLE_TIMEOUT 2 /* Disable broken completion timeout feature */ 246 247 bus_space_tag_t bus_tag; 248 bus_space_handle_t bus_handle; 249 int resource_id; 250 struct resource *resource; 251 252 /* 253 * The NVMe spec allows for the MSI-X table to be placed in BAR 4/5, 254 * separate from the control registers which are in BAR 0/1. These 255 * members track the mapping of BAR 4/5 for that reason. 256 */ 257 int bar4_resource_id; 258 struct resource *bar4_resource; 259 260 uint32_t msix_enabled; 261 uint32_t force_intx; 262 uint32_t enable_aborts; 263 264 uint32_t num_io_queues; 265 uint32_t num_cpus_per_ioq; 266 uint32_t max_hw_pend_io; 267 268 /* Fields for tracking progress during controller initialization. */ 269 struct intr_config_hook config_hook; 270 uint32_t ns_identified; 271 uint32_t queues_created; 272 273 struct task reset_task; 274 struct task fail_req_task; 275 struct taskqueue *taskqueue; 276 277 /* For shared legacy interrupt. */ 278 int rid; 279 struct resource *res; 280 void *tag; 281 282 bus_dma_tag_t hw_desc_tag; 283 bus_dmamap_t hw_desc_map; 284 285 /** maximum i/o size in bytes */ 286 uint32_t max_xfer_size; 287 288 /** minimum page size supported by this controller in bytes */ 289 uint32_t min_page_size; 290 291 /** interrupt coalescing time period (in microseconds) */ 292 uint32_t int_coal_time; 293 294 /** interrupt coalescing threshold */ 295 uint32_t int_coal_threshold; 296 297 /** timeout period in seconds */ 298 uint32_t timeout_period; 299 300 /** doorbell stride */ 301 uint32_t dstrd; 302 303 struct nvme_qpair adminq; 304 struct nvme_qpair *ioq; 305 306 struct nvme_registers *regs; 307 308 struct nvme_controller_data cdata; 309 struct nvme_namespace ns[NVME_MAX_NAMESPACES]; 310 311 struct cdev *cdev; 312 313 /** bit mask of event types currently enabled for async events */ 314 uint32_t async_event_config; 315 316 uint32_t num_aers; 317 struct nvme_async_event_request aer[NVME_MAX_ASYNC_EVENTS]; 318 319 void *cons_cookie[NVME_MAX_CONSUMERS]; 320 321 uint32_t is_resetting; 322 uint32_t is_initialized; 323 uint32_t notification_sent; 324 325 boolean_t is_failed; 326 STAILQ_HEAD(, nvme_request) fail_req; 327 }; 328 329 #define nvme_mmio_offsetof(reg) \ 330 offsetof(struct nvme_registers, reg) 331 332 #define nvme_mmio_read_4(sc, reg) \ 333 bus_space_read_4((sc)->bus_tag, (sc)->bus_handle, \ 334 nvme_mmio_offsetof(reg)) 335 336 #define nvme_mmio_write_4(sc, reg, val) \ 337 bus_space_write_4((sc)->bus_tag, (sc)->bus_handle, \ 338 nvme_mmio_offsetof(reg), val) 339 340 #define nvme_mmio_write_8(sc, reg, val) \ 341 do { \ 342 bus_space_write_4((sc)->bus_tag, (sc)->bus_handle, \ 343 nvme_mmio_offsetof(reg), val & 0xFFFFFFFF); \ 344 bus_space_write_4((sc)->bus_tag, (sc)->bus_handle, \ 345 nvme_mmio_offsetof(reg)+4, \ 346 (val & 0xFFFFFFFF00000000ULL) >> 32); \ 347 } while (0); 348 349 #define nvme_printf(ctrlr, fmt, args...) \ 350 device_printf(ctrlr->dev, fmt, ##args) 351 352 void nvme_ns_test(struct nvme_namespace *ns, u_long cmd, caddr_t arg); 353 354 void nvme_ctrlr_cmd_identify_controller(struct nvme_controller *ctrlr, 355 void *payload, 356 nvme_cb_fn_t cb_fn, void *cb_arg); 357 void nvme_ctrlr_cmd_identify_namespace(struct nvme_controller *ctrlr, 358 uint32_t nsid, void *payload, 359 nvme_cb_fn_t cb_fn, void *cb_arg); 360 void nvme_ctrlr_cmd_set_interrupt_coalescing(struct nvme_controller *ctrlr, 361 uint32_t microseconds, 362 uint32_t threshold, 363 nvme_cb_fn_t cb_fn, 364 void *cb_arg); 365 void nvme_ctrlr_cmd_get_error_page(struct nvme_controller *ctrlr, 366 struct nvme_error_information_entry *payload, 367 uint32_t num_entries, /* 0 = max */ 368 nvme_cb_fn_t cb_fn, 369 void *cb_arg); 370 void nvme_ctrlr_cmd_get_health_information_page(struct nvme_controller *ctrlr, 371 uint32_t nsid, 372 struct nvme_health_information_page *payload, 373 nvme_cb_fn_t cb_fn, 374 void *cb_arg); 375 void nvme_ctrlr_cmd_get_firmware_page(struct nvme_controller *ctrlr, 376 struct nvme_firmware_page *payload, 377 nvme_cb_fn_t cb_fn, 378 void *cb_arg); 379 void nvme_ctrlr_cmd_create_io_cq(struct nvme_controller *ctrlr, 380 struct nvme_qpair *io_que, uint16_t vector, 381 nvme_cb_fn_t cb_fn, void *cb_arg); 382 void nvme_ctrlr_cmd_create_io_sq(struct nvme_controller *ctrlr, 383 struct nvme_qpair *io_que, 384 nvme_cb_fn_t cb_fn, void *cb_arg); 385 void nvme_ctrlr_cmd_delete_io_cq(struct nvme_controller *ctrlr, 386 struct nvme_qpair *io_que, 387 nvme_cb_fn_t cb_fn, void *cb_arg); 388 void nvme_ctrlr_cmd_delete_io_sq(struct nvme_controller *ctrlr, 389 struct nvme_qpair *io_que, 390 nvme_cb_fn_t cb_fn, void *cb_arg); 391 void nvme_ctrlr_cmd_set_num_queues(struct nvme_controller *ctrlr, 392 uint32_t num_queues, nvme_cb_fn_t cb_fn, 393 void *cb_arg); 394 void nvme_ctrlr_cmd_set_async_event_config(struct nvme_controller *ctrlr, 395 uint32_t state, 396 nvme_cb_fn_t cb_fn, void *cb_arg); 397 void nvme_ctrlr_cmd_abort(struct nvme_controller *ctrlr, uint16_t cid, 398 uint16_t sqid, nvme_cb_fn_t cb_fn, void *cb_arg); 399 400 void nvme_completion_poll_cb(void *arg, const struct nvme_completion *cpl); 401 402 int nvme_ctrlr_construct(struct nvme_controller *ctrlr, device_t dev); 403 void nvme_ctrlr_destruct(struct nvme_controller *ctrlr, device_t dev); 404 void nvme_ctrlr_shutdown(struct nvme_controller *ctrlr); 405 int nvme_ctrlr_hw_reset(struct nvme_controller *ctrlr); 406 void nvme_ctrlr_reset(struct nvme_controller *ctrlr); 407 /* ctrlr defined as void * to allow use with config_intrhook. */ 408 void nvme_ctrlr_start_config_hook(void *ctrlr_arg); 409 void nvme_ctrlr_submit_admin_request(struct nvme_controller *ctrlr, 410 struct nvme_request *req); 411 void nvme_ctrlr_submit_io_request(struct nvme_controller *ctrlr, 412 struct nvme_request *req); 413 void nvme_ctrlr_post_failed_request(struct nvme_controller *ctrlr, 414 struct nvme_request *req); 415 416 int nvme_qpair_construct(struct nvme_qpair *qpair, uint32_t id, 417 uint16_t vector, uint32_t num_entries, 418 uint32_t num_trackers, 419 struct nvme_controller *ctrlr); 420 void nvme_qpair_submit_tracker(struct nvme_qpair *qpair, 421 struct nvme_tracker *tr); 422 bool nvme_qpair_process_completions(struct nvme_qpair *qpair); 423 void nvme_qpair_submit_request(struct nvme_qpair *qpair, 424 struct nvme_request *req); 425 void nvme_qpair_reset(struct nvme_qpair *qpair); 426 void nvme_qpair_fail(struct nvme_qpair *qpair); 427 void nvme_qpair_manual_complete_request(struct nvme_qpair *qpair, 428 struct nvme_request *req, 429 uint32_t sct, uint32_t sc); 430 431 void nvme_admin_qpair_enable(struct nvme_qpair *qpair); 432 void nvme_admin_qpair_disable(struct nvme_qpair *qpair); 433 void nvme_admin_qpair_destroy(struct nvme_qpair *qpair); 434 435 void nvme_io_qpair_enable(struct nvme_qpair *qpair); 436 void nvme_io_qpair_disable(struct nvme_qpair *qpair); 437 void nvme_io_qpair_destroy(struct nvme_qpair *qpair); 438 439 int nvme_ns_construct(struct nvme_namespace *ns, uint32_t id, 440 struct nvme_controller *ctrlr); 441 void nvme_ns_destruct(struct nvme_namespace *ns); 442 443 void nvme_sysctl_initialize_ctrlr(struct nvme_controller *ctrlr); 444 445 void nvme_dump_command(struct nvme_command *cmd); 446 void nvme_dump_completion(struct nvme_completion *cpl); 447 448 int nvme_attach(device_t dev); 449 int nvme_shutdown(device_t dev); 450 int nvme_detach(device_t dev); 451 452 /* 453 * Wait for a command to complete using the nvme_completion_poll_cb. 454 * Used in limited contexts where the caller knows it's OK to block 455 * briefly while the command runs. The ISR will run the callback which 456 * will set status->done to true.usually within microseconds. A 1s 457 * pause means something is seriously AFU and we should panic to 458 * provide the proper context to diagnose. 459 */ 460 static __inline 461 void 462 nvme_completion_poll(struct nvme_completion_poll_status *status) 463 { 464 int sanity = hz * 1; 465 466 while (!atomic_load_acq_int(&status->done) && --sanity > 0) 467 pause("nvme", 1); 468 if (sanity <= 0) 469 panic("NVME polled command failed to complete within 1s."); 470 } 471 472 static __inline void 473 nvme_single_map(void *arg, bus_dma_segment_t *seg, int nseg, int error) 474 { 475 uint64_t *bus_addr = (uint64_t *)arg; 476 477 if (error != 0) 478 printf("nvme_single_map err %d\n", error); 479 *bus_addr = seg[0].ds_addr; 480 } 481 482 static __inline struct nvme_request * 483 _nvme_allocate_request(nvme_cb_fn_t cb_fn, void *cb_arg) 484 { 485 struct nvme_request *req; 486 487 req = uma_zalloc(nvme_request_zone, M_NOWAIT | M_ZERO); 488 if (req != NULL) { 489 req->cb_fn = cb_fn; 490 req->cb_arg = cb_arg; 491 req->timeout = TRUE; 492 } 493 return (req); 494 } 495 496 static __inline struct nvme_request * 497 nvme_allocate_request_vaddr(void *payload, uint32_t payload_size, 498 nvme_cb_fn_t cb_fn, void *cb_arg) 499 { 500 struct nvme_request *req; 501 502 req = _nvme_allocate_request(cb_fn, cb_arg); 503 if (req != NULL) { 504 req->type = NVME_REQUEST_VADDR; 505 req->u.payload = payload; 506 req->payload_size = payload_size; 507 } 508 return (req); 509 } 510 511 static __inline struct nvme_request * 512 nvme_allocate_request_null(nvme_cb_fn_t cb_fn, void *cb_arg) 513 { 514 struct nvme_request *req; 515 516 req = _nvme_allocate_request(cb_fn, cb_arg); 517 if (req != NULL) 518 req->type = NVME_REQUEST_NULL; 519 return (req); 520 } 521 522 static __inline struct nvme_request * 523 nvme_allocate_request_bio(struct bio *bio, nvme_cb_fn_t cb_fn, void *cb_arg) 524 { 525 struct nvme_request *req; 526 527 req = _nvme_allocate_request(cb_fn, cb_arg); 528 if (req != NULL) { 529 req->type = NVME_REQUEST_BIO; 530 req->u.bio = bio; 531 } 532 return (req); 533 } 534 535 static __inline struct nvme_request * 536 nvme_allocate_request_ccb(union ccb *ccb, nvme_cb_fn_t cb_fn, void *cb_arg) 537 { 538 struct nvme_request *req; 539 540 req = _nvme_allocate_request(cb_fn, cb_arg); 541 if (req != NULL) { 542 req->type = NVME_REQUEST_CCB; 543 req->u.payload = ccb; 544 } 545 546 return (req); 547 } 548 549 #define nvme_free_request(req) uma_zfree(nvme_request_zone, req) 550 551 void nvme_notify_async_consumers(struct nvme_controller *ctrlr, 552 const struct nvme_completion *async_cpl, 553 uint32_t log_page_id, void *log_page_buffer, 554 uint32_t log_page_size); 555 void nvme_notify_fail_consumers(struct nvme_controller *ctrlr); 556 void nvme_notify_new_controller(struct nvme_controller *ctrlr); 557 void nvme_notify_ns(struct nvme_controller *ctrlr, int nsid); 558 559 void nvme_ctrlr_intx_handler(void *arg); 560 void nvme_ctrlr_poll(struct nvme_controller *ctrlr); 561 562 int nvme_ctrlr_suspend(struct nvme_controller *ctrlr); 563 int nvme_ctrlr_resume(struct nvme_controller *ctrlr); 564 565 #endif /* __NVME_PRIVATE_H__ */ 566