sys/dev/nvme/nvme_private.h

   1 /*-
   2  * Copyright (C) 2012-2013 Intel Corporation
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD$
  27  */
  28
  29 #ifndef __NVME_PRIVATE_H__
  30 #define __NVME_PRIVATE_H__
  31
  32 #include <sys/param.h>
  33 #include <sys/bio.h>
  34 #include <sys/bus.h>
  35 #include <sys/kernel.h>
  36 #include <sys/lock.h>
  37 #include <sys/malloc.h>
  38 #include <sys/mutex.h>
  39 #include <sys/rman.h>
  40 #include <sys/systm.h>
  41 #include <sys/taskqueue.h>
  42
  43 #include <vm/uma.h>
  44
  45 #include <machine/bus.h>
  46
  47 #include "nvme.h"
  48
  49 #define DEVICE2SOFTC(dev) ((struct nvme_controller *) device_get_softc(dev))
  50
  51 MALLOC_DECLARE(M_NVME);
  52
  53 #define CHATHAM2
  54
  55 #ifdef CHATHAM2
  56 #define CHATHAM_PCI_ID          0x20118086
  57 #define CHATHAM_CONTROL_BAR     0
  58 #endif
  59
  60 #define IDT32_PCI_ID            0x80d0111d /* 32 channel board */
  61 #define IDT8_PCI_ID             0x80d2111d /* 8 channel board */
  62
  63 /*
  64  * For commands requiring more than 2 PRP entries, one PRP will be
  65  *  embedded in the command (prp1), and the rest of the PRP entries
  66  *  will be in a list pointed to by the command (prp2).  This means
  67  *  that real max number of PRP entries we support is 32+1, which
  68  *  results in a max xfer size of 32*PAGE_SIZE.
  69  */
  70 #define NVME_MAX_PRP_LIST_ENTRIES       (NVME_MAX_XFER_SIZE / PAGE_SIZE)
  71
  72 #define NVME_ADMIN_TRACKERS     (16)
  73 #define NVME_ADMIN_ENTRIES      (128)
  74 /* min and max are defined in admin queue attributes section of spec */
  75 #define NVME_MIN_ADMIN_ENTRIES  (2)
  76 #define NVME_MAX_ADMIN_ENTRIES  (4096)
  77
  78 /*
  79  * NVME_IO_ENTRIES defines the size of an I/O qpair's submission and completion
  80  *  queues, while NVME_IO_TRACKERS defines the maximum number of I/O that we
  81  *  will allow outstanding on an I/O qpair at any time.  The only advantage in
  82  *  having IO_ENTRIES > IO_TRACKERS is for debugging purposes - when dumping
  83  *  the contents of the submission and completion queues, it will show a longer
  84  *  history of data.
  85  */
  86 #define NVME_IO_ENTRIES         (256)
  87 #define NVME_IO_TRACKERS        (128)
  88 #define NVME_MIN_IO_TRACKERS    (4)
  89 #define NVME_MAX_IO_TRACKERS    (1024)
  90
  91 /*
  92  * NVME_MAX_IO_ENTRIES is not defined, since it is specified in CC.MQES
  93  *  for each controller.
  94  */
  95
  96 #define NVME_INT_COAL_TIME      (0)     /* disabled */
  97 #define NVME_INT_COAL_THRESHOLD (0)     /* 0-based */
  98
  99 #define NVME_MAX_NAMESPACES     (16)
 100 #define NVME_MAX_CONSUMERS      (2)
 101 #define NVME_MAX_ASYNC_EVENTS   (8)
 102
 103 #define NVME_DEFAULT_TIMEOUT_PERIOD     (30)    /* in seconds */
 104 #define NVME_MIN_TIMEOUT_PERIOD         (5)
 105 #define NVME_MAX_TIMEOUT_PERIOD         (120)
 106
 107 #define NVME_DEFAULT_RETRY_COUNT        (4)
 108
 109 /* Maximum log page size to fetch for AERs. */
 110 #define NVME_MAX_AER_LOG_SIZE           (4096)
 111
 112 /*
 113  * Define CACHE_LINE_SIZE here for older FreeBSD versions that do not define
 114  *  it.
 115  */
 116 #ifndef CACHE_LINE_SIZE
 117 #define CACHE_LINE_SIZE         (64)
 118 #endif
 119
 120 /*
 121  * Use presence of the BIO_UNMAPPED flag to determine whether unmapped I/O
 122  *  support and the bus_dmamap_load_bio API are available on the target
 123  *  kernel.  This will ease porting back to earlier stable branches at a
 124  *  later point.
 125  */
 126 #ifdef BIO_UNMAPPED
 127 #define NVME_UNMAPPED_BIO_SUPPORT
 128 #endif
 129
 130 extern uma_zone_t       nvme_request_zone;
 131 extern int32_t          nvme_retry_count;
 132
 133 struct nvme_completion_poll_status {
 134
 135         struct nvme_completion  cpl;
 136         boolean_t               done;
 137 };
 138
 139 #define NVME_REQUEST_VADDR      1
 140 #define NVME_REQUEST_NULL       2 /* For requests with no payload. */
 141 #define NVME_REQUEST_UIO        3
 142 #ifdef NVME_UNMAPPED_BIO_SUPPORT
 143 #define NVME_REQUEST_BIO        4
 144 #endif
 145
 146 struct nvme_request {
 147
 148         struct nvme_command             cmd;
 149         struct nvme_qpair               *qpair;
 150         union {
 151                 void                    *payload;
 152                 struct bio              *bio;
 153         } u;
 154         uint32_t                        type;
 155         uint32_t                        payload_size;
 156         boolean_t                       timeout;
 157         nvme_cb_fn_t                    cb_fn;
 158         void                            *cb_arg;
 159         int32_t                         retries;
 160         STAILQ_ENTRY(nvme_request)      stailq;
 161 };
 162
 163 struct nvme_async_event_request {
 164
 165         struct nvme_controller          *ctrlr;
 166         struct nvme_request             *req;
 167         struct nvme_completion          cpl;
 168         uint32_t                        log_page_id;
 169         uint32_t                        log_page_size;
 170         uint8_t                         log_page_buffer[NVME_MAX_AER_LOG_SIZE];
 171 };
 172
 173 struct nvme_tracker {
 174
 175         TAILQ_ENTRY(nvme_tracker)       tailq;
 176         struct nvme_request             *req;
 177         struct nvme_qpair               *qpair;
 178         struct callout                  timer;
 179         bus_dmamap_t                    payload_dma_map;
 180         uint16_t                        cid;
 181
 182         uint64_t                        prp[NVME_MAX_PRP_LIST_ENTRIES];
 183         bus_addr_t                      prp_bus_addr;
 184         bus_dmamap_t                    prp_dma_map;
 185 };
 186
 187 struct nvme_qpair {
 188
 189         struct nvme_controller  *ctrlr;
 190         uint32_t                id;
 191         uint32_t                phase;
 192
 193         uint16_t                vector;
 194         int                     rid;
 195         struct resource         *res;
 196         void                    *tag;
 197
 198         uint32_t                num_entries;
 199         uint32_t                num_trackers;
 200         uint32_t                sq_tdbl_off;
 201         uint32_t                cq_hdbl_off;
 202
 203         uint32_t                sq_head;
 204         uint32_t                sq_tail;
 205         uint32_t                cq_head;
 206
 207         int64_t                 num_cmds;
 208         int64_t                 num_intr_handler_calls;
 209
 210         struct nvme_command     *cmd;
 211         struct nvme_completion  *cpl;
 212
 213         bus_dma_tag_t           dma_tag;
 214
 215         bus_dmamap_t            cmd_dma_map;
 216         uint64_t                cmd_bus_addr;
 217
 218         bus_dmamap_t            cpl_dma_map;
 219         uint64_t                cpl_bus_addr;
 220
 221         TAILQ_HEAD(, nvme_tracker)      free_tr;
 222         TAILQ_HEAD(, nvme_tracker)      outstanding_tr;
 223         STAILQ_HEAD(, nvme_request)     queued_req;
 224
 225         struct nvme_tracker     **act_tr;
 226
 227         boolean_t               is_enabled;
 228
 229         struct mtx              lock __aligned(CACHE_LINE_SIZE);
 230
 231 } __aligned(CACHE_LINE_SIZE);
 232
 233 struct nvme_namespace {
 234
 235         struct nvme_controller          *ctrlr;
 236         struct nvme_namespace_data      data;
 237         uint16_t                        id;
 238         uint16_t                        flags;
 239         struct cdev                     *cdev;
 240         void                            *cons_cookie[NVME_MAX_CONSUMERS];
 241         struct mtx                      lock;
 242 };
 243
 244 /*
 245  * One of these per allocated PCI device.
 246  */
 247 struct nvme_controller {
 248
 249         device_t                dev;
 250
 251         struct mtx              lock;
 252
 253         uint32_t                ready_timeout_in_ms;
 254
 255         bus_space_tag_t         bus_tag;
 256         bus_space_handle_t      bus_handle;
 257         int                     resource_id;
 258         struct resource         *resource;
 259
 260         /*
 261          * The NVMe spec allows for the MSI-X table to be placed in BAR 4/5,
 262          *  separate from the control registers which are in BAR 0/1.  These
 263          *  members track the mapping of BAR 4/5 for that reason.
 264          */
 265         int                     bar4_resource_id;
 266         struct resource         *bar4_resource;
 267
 268 #ifdef CHATHAM2
 269         bus_space_tag_t         chatham_bus_tag;
 270         bus_space_handle_t      chatham_bus_handle;
 271         int                     chatham_resource_id;
 272         struct resource         *chatham_resource;
 273 #endif
 274
 275         uint32_t                msix_enabled;
 276         uint32_t                force_intx;
 277         uint32_t                enable_aborts;
 278
 279         uint32_t                num_io_queues;
 280         boolean_t               per_cpu_io_queues;
 281
 282         /* Fields for tracking progress during controller initialization. */
 283         struct intr_config_hook config_hook;
 284         uint32_t                ns_identified;
 285         uint32_t                queues_created;
 286
 287         struct task             reset_task;
 288         struct task             fail_req_task;
 289         struct taskqueue        *taskqueue;
 290
 291         /* For shared legacy interrupt. */
 292         int                     rid;
 293         struct resource         *res;
 294         void                    *tag;
 295
 296         bus_dma_tag_t           hw_desc_tag;
 297         bus_dmamap_t            hw_desc_map;
 298
 299         /** maximum i/o size in bytes */
 300         uint32_t                max_xfer_size;
 301
 302         /** minimum page size supported by this controller in bytes */
 303         uint32_t                min_page_size;
 304
 305         /** interrupt coalescing time period (in microseconds) */
 306         uint32_t                int_coal_time;
 307
 308         /** interrupt coalescing threshold */
 309         uint32_t                int_coal_threshold;
 310
 311         /** timeout period in seconds */
 312         uint32_t                timeout_period;
 313
 314         struct nvme_qpair       adminq;
 315         struct nvme_qpair       *ioq;
 316
 317         struct nvme_registers           *regs;
 318
 319         struct nvme_controller_data     cdata;
 320         struct nvme_namespace           ns[NVME_MAX_NAMESPACES];
 321
 322         struct cdev                     *cdev;
 323
 324         uint32_t                        num_aers;
 325         struct nvme_async_event_request aer[NVME_MAX_ASYNC_EVENTS];
 326
 327         void                            *cons_cookie[NVME_MAX_CONSUMERS];
 328
 329         uint32_t                is_resetting;
 330
 331         boolean_t                       is_failed;
 332         STAILQ_HEAD(, nvme_request)     fail_req;
 333
 334 #ifdef CHATHAM2
 335         uint64_t                chatham_size;
 336         uint64_t                chatham_lbas;
 337 #endif
 338 };
 339
 340 #define nvme_mmio_offsetof(reg)                                                \
 341         offsetof(struct nvme_registers, reg)
 342
 343 #define nvme_mmio_read_4(sc, reg)                                              \
 344         bus_space_read_4((sc)->bus_tag, (sc)->bus_handle,                      \
 345             nvme_mmio_offsetof(reg))
 346
 347 #define nvme_mmio_write_4(sc, reg, val)                                        \
 348         bus_space_write_4((sc)->bus_tag, (sc)->bus_handle,                     \
 349             nvme_mmio_offsetof(reg), val)
 350
 351 #define nvme_mmio_write_8(sc, reg, val) \
 352         do {                                                                   \
 353                 bus_space_write_4((sc)->bus_tag, (sc)->bus_handle,             \
 354                     nvme_mmio_offsetof(reg), val & 0xFFFFFFFF);                \
 355                 bus_space_write_4((sc)->bus_tag, (sc)->bus_handle,             \
 356                     nvme_mmio_offsetof(reg)+4,                                 \
 357                     (val & 0xFFFFFFFF00000000UL) >> 32);                       \
 358         } while (0);
 359
 360 #ifdef CHATHAM2
 361 #define chatham_read_4(softc, reg) \
 362         bus_space_read_4((softc)->chatham_bus_tag,                             \
 363             (softc)->chatham_bus_handle, reg)
 364
 365 #define chatham_write_8(sc, reg, val)                                          \
 366         do {                                                                   \
 367                 bus_space_write_4((sc)->chatham_bus_tag,                       \
 368                     (sc)->chatham_bus_handle, reg, val & 0xffffffff);          \
 369                 bus_space_write_4((sc)->chatham_bus_tag,                       \
 370                     (sc)->chatham_bus_handle, reg+4,                           \
 371                     (val & 0xFFFFFFFF00000000UL) >> 32);                       \
 372         } while (0);
 373
 374 #endif /* CHATHAM2 */
 375
 376 #if __FreeBSD_version < 800054
 377 #define wmb()   __asm volatile("sfence" ::: "memory")
 378 #define mb()    __asm volatile("mfence" ::: "memory")
 379 #endif
 380
 381 #define nvme_printf(ctrlr, fmt, args...)        \
 382     device_printf(ctrlr->dev, fmt, ##args)
 383
 384 void    nvme_ns_test(struct nvme_namespace *ns, u_long cmd, caddr_t arg);
 385
 386 void    nvme_ctrlr_cmd_identify_controller(struct nvme_controller *ctrlr,
 387                                            void *payload,
 388                                            nvme_cb_fn_t cb_fn, void *cb_arg);
 389 void    nvme_ctrlr_cmd_identify_namespace(struct nvme_controller *ctrlr,
 390                                           uint16_t nsid, void *payload,
 391                                           nvme_cb_fn_t cb_fn, void *cb_arg);
 392 void    nvme_ctrlr_cmd_set_interrupt_coalescing(struct nvme_controller *ctrlr,
 393                                                 uint32_t microseconds,
 394                                                 uint32_t threshold,
 395                                                 nvme_cb_fn_t cb_fn,
 396                                                 void *cb_arg);
 397 void    nvme_ctrlr_cmd_get_error_page(struct nvme_controller *ctrlr,
 398                                       struct nvme_error_information_entry *payload,
 399                                       uint32_t num_entries, /* 0 = max */
 400                                       nvme_cb_fn_t cb_fn,
 401                                       void *cb_arg);
 402 void    nvme_ctrlr_cmd_get_health_information_page(struct nvme_controller *ctrlr,
 403                                                    uint32_t nsid,
 404                                                    struct nvme_health_information_page *payload,
 405                                                    nvme_cb_fn_t cb_fn,
 406                                                    void *cb_arg);
 407 void    nvme_ctrlr_cmd_get_firmware_page(struct nvme_controller *ctrlr,
 408                                          struct nvme_firmware_page *payload,
 409                                          nvme_cb_fn_t cb_fn,
 410                                          void *cb_arg);
 411 void    nvme_ctrlr_cmd_create_io_cq(struct nvme_controller *ctrlr,
 412                                     struct nvme_qpair *io_que, uint16_t vector,
 413                                     nvme_cb_fn_t cb_fn, void *cb_arg);
 414 void    nvme_ctrlr_cmd_create_io_sq(struct nvme_controller *ctrlr,
 415                                     struct nvme_qpair *io_que,
 416                                     nvme_cb_fn_t cb_fn, void *cb_arg);
 417 void    nvme_ctrlr_cmd_delete_io_cq(struct nvme_controller *ctrlr,
 418                                     struct nvme_qpair *io_que,
 419                                     nvme_cb_fn_t cb_fn, void *cb_arg);
 420 void    nvme_ctrlr_cmd_delete_io_sq(struct nvme_controller *ctrlr,
 421                                     struct nvme_qpair *io_que,
 422                                     nvme_cb_fn_t cb_fn, void *cb_arg);
 423 void    nvme_ctrlr_cmd_set_num_queues(struct nvme_controller *ctrlr,
 424                                       uint32_t num_queues, nvme_cb_fn_t cb_fn,
 425                                       void *cb_arg);
 426 void    nvme_ctrlr_cmd_set_async_event_config(struct nvme_controller *ctrlr,
 427                                               union nvme_critical_warning_state state,
 428                                               nvme_cb_fn_t cb_fn, void *cb_arg);
 429 void    nvme_ctrlr_cmd_abort(struct nvme_controller *ctrlr, uint16_t cid,
 430                              uint16_t sqid, nvme_cb_fn_t cb_fn, void *cb_arg);
 431
 432 void    nvme_completion_poll_cb(void *arg, const struct nvme_completion *cpl);
 433
 434 int     nvme_ctrlr_construct(struct nvme_controller *ctrlr, device_t dev);
 435 void    nvme_ctrlr_destruct(struct nvme_controller *ctrlr, device_t dev);
 436 int     nvme_ctrlr_hw_reset(struct nvme_controller *ctrlr);
 437 void    nvme_ctrlr_reset(struct nvme_controller *ctrlr);
 438 /* ctrlr defined as void * to allow use with config_intrhook. */
 439 void    nvme_ctrlr_start_config_hook(void *ctrlr_arg);
 440 void    nvme_ctrlr_submit_admin_request(struct nvme_controller *ctrlr,
 441                                         struct nvme_request *req);
 442 void    nvme_ctrlr_submit_io_request(struct nvme_controller *ctrlr,
 443                                      struct nvme_request *req);
 444 void    nvme_ctrlr_post_failed_request(struct nvme_controller *ctrlr,
 445                                        struct nvme_request *req);
 446
 447 void    nvme_qpair_construct(struct nvme_qpair *qpair, uint32_t id,
 448                              uint16_t vector, uint32_t num_entries,
 449                              uint32_t num_trackers,
 450                              struct nvme_controller *ctrlr);
 451 void    nvme_qpair_submit_tracker(struct nvme_qpair *qpair,
 452                                   struct nvme_tracker *tr);
 453 void    nvme_qpair_process_completions(struct nvme_qpair *qpair);
 454 void    nvme_qpair_submit_request(struct nvme_qpair *qpair,
 455                                   struct nvme_request *req);
 456 void    nvme_qpair_reset(struct nvme_qpair *qpair);
 457 void    nvme_qpair_fail(struct nvme_qpair *qpair);
 458 void    nvme_qpair_manual_complete_request(struct nvme_qpair *qpair,
 459                                            struct nvme_request *req,
 460                                            uint32_t sct, uint32_t sc,
 461                                            boolean_t print_on_error);
 462
 463 void    nvme_admin_qpair_enable(struct nvme_qpair *qpair);
 464 void    nvme_admin_qpair_disable(struct nvme_qpair *qpair);
 465 void    nvme_admin_qpair_destroy(struct nvme_qpair *qpair);
 466
 467 void    nvme_io_qpair_enable(struct nvme_qpair *qpair);
 468 void    nvme_io_qpair_disable(struct nvme_qpair *qpair);
 469 void    nvme_io_qpair_destroy(struct nvme_qpair *qpair);
 470
 471 int     nvme_ns_construct(struct nvme_namespace *ns, uint16_t id,
 472                           struct nvme_controller *ctrlr);
 473 void    nvme_ns_destruct(struct nvme_namespace *ns);
 474
 475 void    nvme_sysctl_initialize_ctrlr(struct nvme_controller *ctrlr);
 476
 477 void    nvme_dump_command(struct nvme_command *cmd);
 478 void    nvme_dump_completion(struct nvme_completion *cpl);
 479
 480 static __inline void
 481 nvme_single_map(void *arg, bus_dma_segment_t *seg, int nseg, int error)
 482 {
 483         uint64_t *bus_addr = (uint64_t *)arg;
 484
 485         *bus_addr = seg[0].ds_addr;
 486 }
 487
 488 static __inline struct nvme_request *
 489 _nvme_allocate_request(nvme_cb_fn_t cb_fn, void *cb_arg)
 490 {
 491         struct nvme_request *req;
 492
 493         req = uma_zalloc(nvme_request_zone, M_NOWAIT | M_ZERO);
 494         if (req != NULL) {
 495                 req->cb_fn = cb_fn;
 496                 req->cb_arg = cb_arg;
 497                 req->timeout = TRUE;
 498         }
 499         return (req);
 500 }
 501
 502 static __inline struct nvme_request *
 503 nvme_allocate_request_vaddr(void *payload, uint32_t payload_size,
 504     nvme_cb_fn_t cb_fn, void *cb_arg)
 505 {
 506         struct nvme_request *req;
 507
 508         req = _nvme_allocate_request(cb_fn, cb_arg);
 509         if (req != NULL) {
 510                 req->type = NVME_REQUEST_VADDR;
 511                 req->u.payload = payload;
 512                 req->payload_size = payload_size;
 513         }
 514         return (req);
 515 }
 516
 517 static __inline struct nvme_request *
 518 nvme_allocate_request_null(nvme_cb_fn_t cb_fn, void *cb_arg)
 519 {
 520         struct nvme_request *req;
 521
 522         req = _nvme_allocate_request(cb_fn, cb_arg);
 523         if (req != NULL)
 524                 req->type = NVME_REQUEST_NULL;
 525         return (req);
 526 }
 527
 528 static __inline struct nvme_request *
 529 nvme_allocate_request_bio(struct bio *bio, nvme_cb_fn_t cb_fn, void *cb_arg)
 530 {
 531         struct nvme_request *req;
 532
 533         req = _nvme_allocate_request(cb_fn, cb_arg);
 534         if (req != NULL) {
 535 #ifdef NVME_UNMAPPED_BIO_SUPPORT
 536                 req->type = NVME_REQUEST_BIO;
 537                 req->u.bio = bio;
 538 #else
 539                 req->type = NVME_REQUEST_VADDR;
 540                 req->u.payload = bio->bio_data;
 541                 req->payload_size = bio->bio_bcount;
 542 #endif
 543         }
 544         return (req);
 545 }
 546
 547 #define nvme_free_request(req)  uma_zfree(nvme_request_zone, req)
 548
 549 void    nvme_notify_async_consumers(struct nvme_controller *ctrlr,
 550                                     const struct nvme_completion *async_cpl,
 551                                     uint32_t log_page_id, void *log_page_buffer,
 552                                     uint32_t log_page_size);
 553 void    nvme_notify_fail_consumers(struct nvme_controller *ctrlr);
 554
 555 #endif /* __NVME_PRIVATE_H__ */