sys/dev/nvme/nvme.c

   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
  29 #include <sys/cdefs.h>
  30 __FBSDID("$FreeBSD$");
  31
  32 #include <sys/param.h>
  33 #include <sys/bus.h>
  34 #include <sys/conf.h>
  35 #include <sys/module.h>
  36
  37 #include <vm/uma.h>
  38
  39 #include <dev/pci/pcireg.h>
  40 #include <dev/pci/pcivar.h>
  41
  42 #include "nvme_private.h"
  43
  44 struct nvme_consumer {
  45         uint32_t                id;
  46         nvme_cons_ns_fn_t       ns_fn;
  47         nvme_cons_ctrlr_fn_t    ctrlr_fn;
  48         nvme_cons_async_fn_t    async_fn;
  49         nvme_cons_fail_fn_t     fail_fn;
  50 };
  51
  52 struct nvme_consumer nvme_consumer[NVME_MAX_CONSUMERS];
  53 #define INVALID_CONSUMER_ID     0xFFFF
  54
  55 uma_zone_t      nvme_request_zone;
  56 int32_t         nvme_retry_count;
  57
  58 MALLOC_DEFINE(M_NVME, "nvme", "nvme(4) memory allocations");
  59
  60 static int    nvme_probe(device_t);
  61 static int    nvme_attach(device_t);
  62 static int    nvme_detach(device_t);
  63 static int    nvme_shutdown(device_t);
  64 static int    nvme_modevent(module_t mod, int type, void *arg);
  65
  66 static devclass_t nvme_devclass;
  67
  68 static device_method_t nvme_pci_methods[] = {
  69         /* Device interface */
  70         DEVMETHOD(device_probe,     nvme_probe),
  71         DEVMETHOD(device_attach,    nvme_attach),
  72         DEVMETHOD(device_detach,    nvme_detach),
  73         DEVMETHOD(device_shutdown,  nvme_shutdown),
  74         { 0, 0 }
  75 };
  76
  77 static driver_t nvme_pci_driver = {
  78         "nvme",
  79         nvme_pci_methods,
  80         sizeof(struct nvme_controller),
  81 };
  82
  83 DRIVER_MODULE(nvme, pci, nvme_pci_driver, nvme_devclass, nvme_modevent, 0);
  84 MODULE_VERSION(nvme, 1);
  85 MODULE_DEPEND(nvme, cam, 1, 1, 1);
  86
  87 static struct _pcsid
  88 {
  89         uint32_t        devid;
  90         int             match_subdevice;
  91         uint16_t        subdevice;
  92         const char      *desc;
  93         uint32_t        quirks;
  94 } pci_ids[] = {
  95         { 0x01118086,           0, 0, "NVMe Controller"  },
  96         { IDT32_PCI_ID,         0, 0, "IDT NVMe Controller (32 channel)"  },
  97         { IDT8_PCI_ID,          0, 0, "IDT NVMe Controller (8 channel)" },
  98         { 0x09538086,           1, 0x3702, "DC P3700 SSD" },
  99         { 0x09538086,           1, 0x3703, "DC P3700 SSD [2.5\" SFF]" },
 100         { 0x09538086,           1, 0x3704, "DC P3500 SSD [Add-in Card]" },
 101         { 0x09538086,           1, 0x3705, "DC P3500 SSD [2.5\" SFF]" },
 102         { 0x09538086,           1, 0x3709, "DC P3600 SSD [Add-in Card]" },
 103         { 0x09538086,           1, 0x370a, "DC P3600 SSD [2.5\" SFF]" },
 104         { 0x00031c58,           0, 0, "HGST SN100",     QUIRK_DELAY_B4_CHK_RDY },
 105         { 0x00231c58,           0, 0, "WDC SN200",      QUIRK_DELAY_B4_CHK_RDY },
 106         { 0x05401c5f,           0, 0, "Memblaze Pblaze4", QUIRK_DELAY_B4_CHK_RDY },
 107         { 0xa821144d,           0, 0, "Samsung PM1725", QUIRK_DELAY_B4_CHK_RDY },
 108         { 0xa822144d,           0, 0, "Samsung PM1725a", QUIRK_DELAY_B4_CHK_RDY },
 109         { 0x00000000,           0, 0, NULL  }
 110 };
 111
 112 static int
 113 nvme_match(uint32_t devid, uint16_t subdevice, struct _pcsid *ep)
 114 {
 115         if (devid != ep->devid)
 116                 return 0;
 117
 118         if (!ep->match_subdevice)
 119                 return 1;
 120
 121         if (subdevice == ep->subdevice)
 122                 return 1;
 123         else
 124                 return 0;
 125 }
 126
 127 static int
 128 nvme_probe (device_t device)
 129 {
 130         struct _pcsid   *ep;
 131         uint32_t        devid;
 132         uint16_t        subdevice;
 133
 134         devid = pci_get_devid(device);
 135         subdevice = pci_get_subdevice(device);
 136         ep = pci_ids;
 137
 138         while (ep->devid) {
 139                 if (nvme_match(devid, subdevice, ep))
 140                         break;
 141                 ++ep;
 142         }
 143
 144         if (ep->desc) {
 145                 device_set_desc(device, ep->desc);
 146                 return (BUS_PROBE_DEFAULT);
 147         }
 148
 149 #if defined(PCIS_STORAGE_NVM)
 150         if (pci_get_class(device)    == PCIC_STORAGE &&
 151             pci_get_subclass(device) == PCIS_STORAGE_NVM &&
 152             pci_get_progif(device)   == PCIP_STORAGE_NVM_ENTERPRISE_NVMHCI_1_0) {
 153                 device_set_desc(device, "Generic NVMe Device");
 154                 return (BUS_PROBE_GENERIC);
 155         }
 156 #endif
 157
 158         return (ENXIO);
 159 }
 160
 161 static void
 162 nvme_init(void)
 163 {
 164         uint32_t        i;
 165
 166         nvme_request_zone = uma_zcreate("nvme_request",
 167             sizeof(struct nvme_request), NULL, NULL, NULL, NULL, 0, 0);
 168
 169         for (i = 0; i < NVME_MAX_CONSUMERS; i++)
 170                 nvme_consumer[i].id = INVALID_CONSUMER_ID;
 171 }
 172
 173 SYSINIT(nvme_register, SI_SUB_DRIVERS, SI_ORDER_SECOND, nvme_init, NULL);
 174
 175 static void
 176 nvme_uninit(void)
 177 {
 178         uma_zdestroy(nvme_request_zone);
 179 }
 180
 181 SYSUNINIT(nvme_unregister, SI_SUB_DRIVERS, SI_ORDER_SECOND, nvme_uninit, NULL);
 182
 183 static void
 184 nvme_load(void)
 185 {
 186 }
 187
 188 static void
 189 nvme_unload(void)
 190 {
 191 }
 192
 193 static int
 194 nvme_shutdown(device_t dev)
 195 {
 196         struct nvme_controller  *ctrlr;
 197
 198         ctrlr = DEVICE2SOFTC(dev);
 199         nvme_ctrlr_shutdown(ctrlr);
 200
 201         return (0);
 202 }
 203
 204 static int
 205 nvme_modevent(module_t mod, int type, void *arg)
 206 {
 207
 208         switch (type) {
 209         case MOD_LOAD:
 210                 nvme_load();
 211                 break;
 212         case MOD_UNLOAD:
 213                 nvme_unload();
 214                 break;
 215         default:
 216                 break;
 217         }
 218
 219         return (0);
 220 }
 221
 222 void
 223 nvme_dump_command(struct nvme_command *cmd)
 224 {
 225         printf(
 226 "opc:%x f:%x r1:%x cid:%x nsid:%x r2:%x r3:%x mptr:%jx prp1:%jx prp2:%jx cdw:%x %x %x %x %x %x\n",
 227             cmd->opc, cmd->fuse, cmd->rsvd1, cmd->cid, cmd->nsid,
 228             cmd->rsvd2, cmd->rsvd3,
 229             (uintmax_t)cmd->mptr, (uintmax_t)cmd->prp1, (uintmax_t)cmd->prp2,
 230             cmd->cdw10, cmd->cdw11, cmd->cdw12, cmd->cdw13, cmd->cdw14,
 231             cmd->cdw15);
 232 }
 233
 234 void
 235 nvme_dump_completion(struct nvme_completion *cpl)
 236 {
 237         printf("cdw0:%08x sqhd:%04x sqid:%04x "
 238             "cid:%04x p:%x sc:%02x sct:%x m:%x dnr:%x\n",
 239             cpl->cdw0, cpl->sqhd, cpl->sqid,
 240             cpl->cid, cpl->status.p, cpl->status.sc, cpl->status.sct,
 241             cpl->status.m, cpl->status.dnr);
 242 }
 243
 244 static int
 245 nvme_attach(device_t dev)
 246 {
 247         struct nvme_controller  *ctrlr = DEVICE2SOFTC(dev);
 248         int                     status;
 249         struct _pcsid           *ep;
 250         uint32_t                devid;
 251         uint16_t                subdevice;
 252
 253         devid = pci_get_devid(dev);
 254         subdevice = pci_get_subdevice(dev);
 255         ep = pci_ids;
 256         while (ep->devid) {
 257                 if (nvme_match(devid, subdevice, ep))
 258                         break;
 259                 ++ep;
 260         }
 261         ctrlr->quirks = ep->quirks;
 262
 263         status = nvme_ctrlr_construct(ctrlr, dev);
 264
 265         if (status != 0) {
 266                 nvme_ctrlr_destruct(ctrlr, dev);
 267                 return (status);
 268         }
 269
 270         /*
 271          * Enable busmastering so the completion status messages can
 272          * be busmastered back to the host.
 273          */
 274         pci_enable_busmaster(dev);
 275
 276         /*
 277          * Reset controller twice to ensure we do a transition from cc.en==1
 278          *  to cc.en==0.  This is because we don't really know what status
 279          *  the controller was left in when boot handed off to OS.
 280          */
 281         status = nvme_ctrlr_hw_reset(ctrlr);
 282         if (status != 0) {
 283                 nvme_ctrlr_destruct(ctrlr, dev);
 284                 return (status);
 285         }
 286
 287         status = nvme_ctrlr_hw_reset(ctrlr);
 288         if (status != 0) {
 289                 nvme_ctrlr_destruct(ctrlr, dev);
 290                 return (status);
 291         }
 292
 293         ctrlr->config_hook.ich_func = nvme_ctrlr_start_config_hook;
 294         ctrlr->config_hook.ich_arg = ctrlr;
 295
 296         config_intrhook_establish(&ctrlr->config_hook);
 297
 298         return (0);
 299 }
 300
 301 static int
 302 nvme_detach (device_t dev)
 303 {
 304         struct nvme_controller  *ctrlr = DEVICE2SOFTC(dev);
 305
 306         nvme_ctrlr_destruct(ctrlr, dev);
 307         pci_disable_busmaster(dev);
 308         return (0);
 309 }
 310
 311 static void
 312 nvme_notify(struct nvme_consumer *cons,
 313             struct nvme_controller *ctrlr)
 314 {
 315         struct nvme_namespace   *ns;
 316         void                    *ctrlr_cookie;
 317         int                     cmpset, ns_idx;
 318
 319         /*
 320          * The consumer may register itself after the nvme devices
 321          *  have registered with the kernel, but before the
 322          *  driver has completed initialization.  In that case,
 323          *  return here, and when initialization completes, the
 324          *  controller will make sure the consumer gets notified.
 325          */
 326         if (!ctrlr->is_initialized)
 327                 return;
 328
 329         cmpset = atomic_cmpset_32(&ctrlr->notification_sent, 0, 1);
 330
 331         if (cmpset == 0)
 332                 return;
 333
 334         if (cons->ctrlr_fn != NULL)
 335                 ctrlr_cookie = (*cons->ctrlr_fn)(ctrlr);
 336         else
 337                 ctrlr_cookie = NULL;
 338         ctrlr->cons_cookie[cons->id] = ctrlr_cookie;
 339         if (ctrlr->is_failed) {
 340                 if (cons->fail_fn != NULL)
 341                         (*cons->fail_fn)(ctrlr_cookie);
 342                 /*
 343                  * Do not notify consumers about the namespaces of a
 344                  *  failed controller.
 345                  */
 346                 return;
 347         }
 348         for (ns_idx = 0; ns_idx < min(ctrlr->cdata.nn, NVME_MAX_NAMESPACES); ns_idx++) {
 349                 ns = &ctrlr->ns[ns_idx];
 350                 if (ns->data.nsze == 0)
 351                         continue;
 352                 if (cons->ns_fn != NULL)
 353                         ns->cons_cookie[cons->id] =
 354                             (*cons->ns_fn)(ns, ctrlr_cookie);
 355         }
 356 }
 357
 358 void
 359 nvme_notify_new_controller(struct nvme_controller *ctrlr)
 360 {
 361         int i;
 362
 363         for (i = 0; i < NVME_MAX_CONSUMERS; i++) {
 364                 if (nvme_consumer[i].id != INVALID_CONSUMER_ID) {
 365                         nvme_notify(&nvme_consumer[i], ctrlr);
 366                 }
 367         }
 368 }
 369
 370 static void
 371 nvme_notify_new_consumer(struct nvme_consumer *cons)
 372 {
 373         device_t                *devlist;
 374         struct nvme_controller  *ctrlr;
 375         int                     dev_idx, devcount;
 376
 377         if (devclass_get_devices(nvme_devclass, &devlist, &devcount))
 378                 return;
 379
 380         for (dev_idx = 0; dev_idx < devcount; dev_idx++) {
 381                 ctrlr = DEVICE2SOFTC(devlist[dev_idx]);
 382                 nvme_notify(cons, ctrlr);
 383         }
 384
 385         free(devlist, M_TEMP);
 386 }
 387
 388 void
 389 nvme_notify_async_consumers(struct nvme_controller *ctrlr,
 390                             const struct nvme_completion *async_cpl,
 391                             uint32_t log_page_id, void *log_page_buffer,
 392                             uint32_t log_page_size)
 393 {
 394         struct nvme_consumer    *cons;
 395         uint32_t                i;
 396
 397         for (i = 0; i < NVME_MAX_CONSUMERS; i++) {
 398                 cons = &nvme_consumer[i];
 399                 if (cons->id != INVALID_CONSUMER_ID && cons->async_fn != NULL)
 400                         (*cons->async_fn)(ctrlr->cons_cookie[i], async_cpl,
 401                             log_page_id, log_page_buffer, log_page_size);
 402         }
 403 }
 404
 405 void
 406 nvme_notify_fail_consumers(struct nvme_controller *ctrlr)
 407 {
 408         struct nvme_consumer    *cons;
 409         uint32_t                i;
 410
 411         /*
 412          * This controller failed during initialization (i.e. IDENTIFY
 413          *  command failed or timed out).  Do not notify any nvme
 414          *  consumers of the failure here, since the consumer does not
 415          *  even know about the controller yet.
 416          */
 417         if (!ctrlr->is_initialized)
 418                 return;
 419
 420         for (i = 0; i < NVME_MAX_CONSUMERS; i++) {
 421                 cons = &nvme_consumer[i];
 422                 if (cons->id != INVALID_CONSUMER_ID && cons->fail_fn != NULL)
 423                         cons->fail_fn(ctrlr->cons_cookie[i]);
 424         }
 425 }
 426
 427 struct nvme_consumer *
 428 nvme_register_consumer(nvme_cons_ns_fn_t ns_fn, nvme_cons_ctrlr_fn_t ctrlr_fn,
 429                        nvme_cons_async_fn_t async_fn,
 430                        nvme_cons_fail_fn_t fail_fn)
 431 {
 432         int i;
 433
 434         /*
 435          * TODO: add locking around consumer registration.  Not an issue
 436          *  right now since we only have one nvme consumer - nvd(4).
 437          */
 438         for (i = 0; i < NVME_MAX_CONSUMERS; i++)
 439                 if (nvme_consumer[i].id == INVALID_CONSUMER_ID) {
 440                         nvme_consumer[i].id = i;
 441                         nvme_consumer[i].ns_fn = ns_fn;
 442                         nvme_consumer[i].ctrlr_fn = ctrlr_fn;
 443                         nvme_consumer[i].async_fn = async_fn;
 444                         nvme_consumer[i].fail_fn = fail_fn;
 445
 446                         nvme_notify_new_consumer(&nvme_consumer[i]);
 447                         return (&nvme_consumer[i]);
 448                 }
 449
 450         printf("nvme(4): consumer not registered - no slots available\n");
 451         return (NULL);
 452 }
 453
 454 void
 455 nvme_unregister_consumer(struct nvme_consumer *consumer)
 456 {
 457
 458         consumer->id = INVALID_CONSUMER_ID;
 459 }
 460
 461 void
 462 nvme_completion_poll_cb(void *arg, const struct nvme_completion *cpl)
 463 {
 464         struct nvme_completion_poll_status      *status = arg;
 465
 466         /*
 467          * Copy status into the argument passed by the caller, so that
 468          *  the caller can check the status to determine if the
 469          *  the request passed or failed.
 470          */
 471         memcpy(&status->cpl, cpl, sizeof(*cpl));
 472         wmb();
 473         status->done = TRUE;
 474 }