sys/dev/nvme/nvme_private.h

   1 /*-
   2  * Copyright (C) 2012 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/kernel.h>
  34 #include <sys/lock.h>
  35 #include <sys/malloc.h>
  36 #include <sys/mutex.h>
  37 #include <sys/rman.h>
  38 #include <sys/systm.h>
  39
  40 #include <vm/uma.h>
  41
  42 #include <machine/bus.h>
  43
  44 #include "nvme.h"
  45
  46 #define DEVICE2SOFTC(dev) ((struct nvme_controller *) device_get_softc(dev))
  47
  48 MALLOC_DECLARE(M_NVME);
  49
  50 #define CHATHAM2
  51
  52 #ifdef CHATHAM2
  53 #define CHATHAM_PCI_ID          0x20118086
  54 #define CHATHAM_CONTROL_BAR     0
  55 #endif
  56
  57 #define IDT32_PCI_ID            0x80d0111d /* 32 channel board */
  58 #define IDT8_PCI_ID             0x80d2111d /* 8 channel board */
  59
  60 #define NVME_MAX_PRP_LIST_ENTRIES       (32)
  61
  62 /*
  63  * For commands requiring more than 2 PRP entries, one PRP will be
  64  *  embedded in the command (prp1), and the rest of the PRP entries
  65  *  will be in a list pointed to by the command (prp2).  This means
  66  *  that real max number of PRP entries we support is 32+1, which
  67  *  results in a max xfer size of 32*PAGE_SIZE.
  68  */
  69 #define NVME_MAX_XFER_SIZE      NVME_MAX_PRP_LIST_ENTRIES * PAGE_SIZE
  70
  71 #define NVME_ADMIN_TRACKERS     (16)
  72 #define NVME_ADMIN_ENTRIES      (128)
  73 /* min and max are defined in admin queue attributes section of spec */
  74 #define NVME_MIN_ADMIN_ENTRIES  (2)
  75 #define NVME_MAX_ADMIN_ENTRIES  (4096)
  76
  77 /*
  78  * NVME_IO_ENTRIES defines the size of an I/O qpair's submission and completion
  79  *  queues, while NVME_IO_TRACKERS defines the maximum number of I/O that we
  80  *  will allow outstanding on an I/O qpair at any time.  The only advantage in
  81  *  having IO_ENTRIES > IO_TRACKERS is for debugging purposes - when dumping
  82  *  the contents of the submission and completion queues, it will show a longer
  83  *  history of data.
  84  */
  85 #define NVME_IO_ENTRIES         (256)
  86 #define NVME_IO_TRACKERS        (128)
  87 #define NVME_MIN_IO_TRACKERS    (16)
  88 #define NVME_MAX_IO_TRACKERS    (1024)
  89
  90 /*
  91  * NVME_MAX_IO_ENTRIES is not defined, since it is specified in CC.MQES
  92  *  for each controller.
  93  */
  94
  95 #define NVME_INT_COAL_TIME      (0)     /* disabled */
  96 #define NVME_INT_COAL_THRESHOLD (0)     /* 0-based */
  97
  98 #define NVME_MAX_NAMESPACES     (16)
  99 #define NVME_MAX_CONSUMERS      (2)
 100 #define NVME_MAX_ASYNC_EVENTS   (4)
 101
 102 #define NVME_TIMEOUT_IN_SEC     (30)
 103
 104 #ifndef CACHE_LINE_SIZE
 105 #define CACHE_LINE_SIZE         (64)
 106 #endif
 107
 108 extern uma_zone_t nvme_request_zone;
 109
 110 struct nvme_request {
 111
 112         struct nvme_command             cmd;
 113         void                            *payload;
 114         uint32_t                        payload_size;
 115         struct uio                      *uio;
 116         nvme_cb_fn_t                    cb_fn;
 117         void                            *cb_arg;
 118         STAILQ_ENTRY(nvme_request)      stailq;
 119 };
 120
 121 struct nvme_tracker {
 122
 123         SLIST_ENTRY(nvme_tracker)       slist;
 124         struct nvme_request             *req;
 125         struct nvme_qpair               *qpair;
 126         struct callout                  timer;
 127         bus_dmamap_t                    payload_dma_map;
 128         uint16_t                        cid;
 129
 130         uint64_t                        prp[NVME_MAX_PRP_LIST_ENTRIES];
 131         bus_addr_t                      prp_bus_addr;
 132         bus_dmamap_t                    prp_dma_map;
 133 };
 134
 135 struct nvme_qpair {
 136
 137         struct nvme_controller  *ctrlr;
 138         uint32_t                id;
 139         uint32_t                phase;
 140
 141         uint16_t                vector;
 142         int                     rid;
 143         struct resource         *res;
 144         void                    *tag;
 145
 146         uint32_t                max_xfer_size;
 147         uint32_t                num_entries;
 148         uint32_t                num_trackers;
 149         uint32_t                sq_tdbl_off;
 150         uint32_t                cq_hdbl_off;
 151
 152         uint32_t                sq_head;
 153         uint32_t                sq_tail;
 154         uint32_t                cq_head;
 155
 156         int64_t                 num_cmds;
 157         int64_t                 num_intr_handler_calls;
 158
 159         struct nvme_command     *cmd;
 160         struct nvme_completion  *cpl;
 161
 162         bus_dma_tag_t           dma_tag;
 163
 164         bus_dmamap_t            cmd_dma_map;
 165         uint64_t                cmd_bus_addr;
 166
 167         bus_dmamap_t            cpl_dma_map;
 168         uint64_t                cpl_bus_addr;
 169
 170         SLIST_HEAD(, nvme_tracker)      free_tr;
 171         STAILQ_HEAD(, nvme_request)     queued_req;
 172
 173         struct nvme_tracker     **act_tr;
 174
 175         struct mtx              lock __aligned(CACHE_LINE_SIZE);
 176
 177 } __aligned(CACHE_LINE_SIZE);
 178
 179 struct nvme_namespace {
 180
 181         struct nvme_controller          *ctrlr;
 182         struct nvme_namespace_data      data;
 183         uint16_t                        id;
 184         uint16_t                        flags;
 185         struct cdev                     *cdev;
 186 };
 187
 188 /*
 189  * One of these per allocated PCI device.
 190  */
 191 struct nvme_controller {
 192
 193         device_t                dev;
 194
 195         uint32_t                ready_timeout_in_ms;
 196
 197         bus_space_tag_t         bus_tag;
 198         bus_space_handle_t      bus_handle;
 199         int                     resource_id;
 200         struct resource         *resource;
 201
 202         /*
 203          * The NVMe spec allows for the MSI-X table to be placed in BAR 4/5,
 204          *  separate from the control registers which are in BAR 0/1.  These
 205          *  members track the mapping of BAR 4/5 for that reason.
 206          */
 207         int                     bar4_resource_id;
 208         struct resource         *bar4_resource;
 209
 210 #ifdef CHATHAM2
 211         bus_space_tag_t         chatham_bus_tag;
 212         bus_space_handle_t      chatham_bus_handle;
 213         int                     chatham_resource_id;
 214         struct resource         *chatham_resource;
 215 #endif
 216
 217         uint32_t                msix_enabled;
 218         uint32_t                force_intx;
 219
 220         uint32_t                num_io_queues;
 221         boolean_t               per_cpu_io_queues;
 222
 223         /* Fields for tracking progress during controller initialization. */
 224         struct intr_config_hook config_hook;
 225         uint32_t                ns_identified;
 226         uint32_t                queues_created;
 227
 228         /* For shared legacy interrupt. */
 229         int                     rid;
 230         struct resource         *res;
 231         void                    *tag;
 232
 233         bus_dma_tag_t           hw_desc_tag;
 234         bus_dmamap_t            hw_desc_map;
 235
 236         /** maximum i/o size in bytes */
 237         uint32_t                max_xfer_size;
 238
 239         /** interrupt coalescing time period (in microseconds) */
 240         uint32_t                int_coal_time;
 241
 242         /** interrupt coalescing threshold */
 243         uint32_t                int_coal_threshold;
 244
 245         struct nvme_qpair       adminq;
 246         struct nvme_qpair       *ioq;
 247
 248         struct nvme_registers           *regs;
 249
 250         struct nvme_controller_data     cdata;
 251         struct nvme_namespace           ns[NVME_MAX_NAMESPACES];
 252
 253         struct cdev                     *cdev;
 254
 255         boolean_t                       is_started;
 256
 257 #ifdef CHATHAM2
 258         uint64_t                chatham_size;
 259         uint64_t                chatham_lbas;
 260 #endif
 261 };
 262
 263 #define nvme_mmio_offsetof(reg)                                                \
 264         offsetof(struct nvme_registers, reg)
 265
 266 #define nvme_mmio_read_4(sc, reg)                                              \
 267         bus_space_read_4((sc)->bus_tag, (sc)->bus_handle,                      \
 268             nvme_mmio_offsetof(reg))
 269
 270 #define nvme_mmio_write_4(sc, reg, val)                                        \
 271         bus_space_write_4((sc)->bus_tag, (sc)->bus_handle,                     \
 272             nvme_mmio_offsetof(reg), val)
 273
 274 #define nvme_mmio_write_8(sc, reg, val) \
 275         do {                                                                   \
 276                 bus_space_write_4((sc)->bus_tag, (sc)->bus_handle,             \
 277                     nvme_mmio_offsetof(reg), val & 0xFFFFFFFF);                \
 278                 bus_space_write_4((sc)->bus_tag, (sc)->bus_handle,             \
 279                     nvme_mmio_offsetof(reg)+4,                                 \
 280                     (val & 0xFFFFFFFF00000000UL) >> 32);                       \
 281         } while (0);
 282
 283 #ifdef CHATHAM2
 284 #define chatham_read_4(softc, reg) \
 285         bus_space_read_4((softc)->chatham_bus_tag,                             \
 286             (softc)->chatham_bus_handle, reg)
 287
 288 #define chatham_write_8(sc, reg, val)                                          \
 289         do {                                                                   \
 290                 bus_space_write_4((sc)->chatham_bus_tag,                       \
 291                     (sc)->chatham_bus_handle, reg, val & 0xffffffff);          \
 292                 bus_space_write_4((sc)->chatham_bus_tag,                       \
 293                     (sc)->chatham_bus_handle, reg+4,                           \
 294                     (val & 0xFFFFFFFF00000000UL) >> 32);                       \
 295         } while (0);
 296
 297 #endif /* CHATHAM2 */
 298
 299 #if __FreeBSD_version < 800054
 300 #define wmb()   __asm volatile("sfence" ::: "memory")
 301 #define mb()    __asm volatile("mfence" ::: "memory")
 302 #endif
 303
 304 void    nvme_ns_test(struct nvme_namespace *ns, u_long cmd, caddr_t arg);
 305
 306 void    nvme_ctrlr_cmd_set_feature(struct nvme_controller *ctrlr,
 307                                    uint8_t feature, uint32_t cdw11,
 308                                    void *payload, uint32_t payload_size,
 309                                    nvme_cb_fn_t cb_fn, void *cb_arg);
 310 void    nvme_ctrlr_cmd_get_feature(struct nvme_controller *ctrlr,
 311                                    uint8_t feature, uint32_t cdw11,
 312                                    void *payload, uint32_t payload_size,
 313                                    nvme_cb_fn_t cb_fn, void *cb_arg);
 314 void    nvme_ctrlr_cmd_identify_controller(struct nvme_controller *ctrlr,
 315                                            void *payload,
 316                                            nvme_cb_fn_t cb_fn, void *cb_arg);
 317 void    nvme_ctrlr_cmd_identify_namespace(struct nvme_controller *ctrlr,
 318                                           uint16_t nsid, void *payload,
 319                                           nvme_cb_fn_t cb_fn, void *cb_arg);
 320 void    nvme_ctrlr_cmd_set_interrupt_coalescing(struct nvme_controller *ctrlr,
 321                                                 uint32_t microseconds,
 322                                                 uint32_t threshold,
 323                                                 nvme_cb_fn_t cb_fn,
 324                                                 void *cb_arg);
 325 void    nvme_ctrlr_cmd_get_health_information_page(struct nvme_controller *ctrlr,
 326                                                    uint32_t nsid,
 327                                                    struct nvme_health_information_page *payload,
 328                                                    nvme_cb_fn_t cb_fn,
 329                                                    void *cb_arg);
 330 void    nvme_ctrlr_cmd_create_io_cq(struct nvme_controller *ctrlr,
 331                                     struct nvme_qpair *io_que, uint16_t vector,
 332                                     nvme_cb_fn_t cb_fn, void *cb_arg);
 333 void    nvme_ctrlr_cmd_create_io_sq(struct nvme_controller *ctrlr,
 334                                     struct nvme_qpair *io_que,
 335                                     nvme_cb_fn_t cb_fn, void *cb_arg);
 336 void    nvme_ctrlr_cmd_delete_io_cq(struct nvme_controller *ctrlr,
 337                                     struct nvme_qpair *io_que,
 338                                     nvme_cb_fn_t cb_fn, void *cb_arg);
 339 void    nvme_ctrlr_cmd_delete_io_sq(struct nvme_controller *ctrlr,
 340                                     struct nvme_qpair *io_que,
 341                                     nvme_cb_fn_t cb_fn, void *cb_arg);
 342 void    nvme_ctrlr_cmd_set_num_queues(struct nvme_controller *ctrlr,
 343                                       uint32_t num_queues, nvme_cb_fn_t cb_fn,
 344                                       void *cb_arg);
 345 void    nvme_ctrlr_cmd_set_asynchronous_event_config(struct nvme_controller *ctrlr,
 346                                            union nvme_critical_warning_state state,
 347                                            nvme_cb_fn_t cb_fn, void *cb_arg);
 348 void    nvme_ctrlr_cmd_asynchronous_event_request(struct nvme_controller *ctrlr,
 349                                                   nvme_cb_fn_t cb_fn,
 350                                                   void *cb_arg);
 351
 352 void    nvme_payload_map(void *arg, bus_dma_segment_t *seg, int nseg,
 353                          int error);
 354 void    nvme_payload_map_uio(void *arg, bus_dma_segment_t *seg, int nseg,
 355                              bus_size_t mapsize, int error);
 356
 357 int     nvme_ctrlr_construct(struct nvme_controller *ctrlr, device_t dev);
 358 int     nvme_ctrlr_reset(struct nvme_controller *ctrlr);
 359 /* ctrlr defined as void * to allow use with config_intrhook. */
 360 void    nvme_ctrlr_start(void *ctrlr_arg);
 361 void    nvme_ctrlr_submit_admin_request(struct nvme_controller *ctrlr,
 362                                         struct nvme_request *req);
 363 void    nvme_ctrlr_submit_io_request(struct nvme_controller *ctrlr,
 364                                      struct nvme_request *req);
 365
 366 void    nvme_qpair_construct(struct nvme_qpair *qpair, uint32_t id,
 367                              uint16_t vector, uint32_t num_entries,
 368                              uint32_t num_trackers, uint32_t max_xfer_size,
 369                              struct nvme_controller *ctrlr);
 370 void    nvme_qpair_submit_cmd(struct nvme_qpair *qpair,
 371                               struct nvme_tracker *tr);
 372 void    nvme_qpair_process_completions(struct nvme_qpair *qpair);
 373 void    nvme_qpair_submit_request(struct nvme_qpair *qpair,
 374                                   struct nvme_request *req);
 375
 376 void    nvme_admin_qpair_destroy(struct nvme_qpair *qpair);
 377
 378 void    nvme_io_qpair_destroy(struct nvme_qpair *qpair);
 379
 380 int     nvme_ns_construct(struct nvme_namespace *ns, uint16_t id,
 381                           struct nvme_controller *ctrlr);
 382
 383 int     nvme_ns_physio(struct cdev *dev, struct uio *uio, int ioflag);
 384
 385 void    nvme_sysctl_initialize_ctrlr(struct nvme_controller *ctrlr);
 386
 387 void    nvme_dump_command(struct nvme_command *cmd);
 388 void    nvme_dump_completion(struct nvme_completion *cpl);
 389
 390 static __inline void
 391 nvme_single_map(void *arg, bus_dma_segment_t *seg, int nseg, int error)
 392 {
 393         uint64_t *bus_addr = (uint64_t *)arg;
 394
 395         *bus_addr = seg[0].ds_addr;
 396 }
 397
 398 static __inline struct nvme_request *
 399 nvme_allocate_request(void *payload, uint32_t payload_size, nvme_cb_fn_t cb_fn,
 400                       void *cb_arg)
 401 {
 402         struct nvme_request *req;
 403
 404         req = uma_zalloc(nvme_request_zone, M_NOWAIT | M_ZERO);
 405         if (req == NULL)
 406                 return (NULL);
 407
 408         req->payload = payload;
 409         req->payload_size = payload_size;
 410         req->cb_fn = cb_fn;
 411         req->cb_arg = cb_arg;
 412
 413         return (req);
 414 }
 415
 416 static __inline struct nvme_request *
 417 nvme_allocate_request_uio(struct uio *uio, nvme_cb_fn_t cb_fn, void *cb_arg)
 418 {
 419         struct nvme_request *req;
 420
 421         req = uma_zalloc(nvme_request_zone, M_NOWAIT | M_ZERO);
 422         if (req == NULL)
 423                 return (NULL);
 424
 425         req->uio = uio;
 426         req->cb_fn = cb_fn;
 427         req->cb_arg = cb_arg;
 428
 429         return (req);
 430 }
 431
 432 #define nvme_free_request(req)  uma_zfree(nvme_request_zone, req)
 433
 434 #endif /* __NVME_PRIVATE_H__ */