sys/dev/nvdimm/nvdimm_spa.c

   1 /*-
   2  * Copyright (c) 2017, 2018 The FreeBSD Foundation
   3  * All rights reserved.
   4  * Copyright (c) 2018, 2019 Intel Corporation
   5  *
   6  * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
   7  * under sponsorship from the FreeBSD Foundation.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include "opt_acpi.h"
  35 #include "opt_ddb.h"
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/bio.h>
  40 #include <sys/bus.h>
  41 #include <sys/conf.h>
  42 #include <sys/devicestat.h>
  43 #include <sys/disk.h>
  44 #include <sys/efi.h>
  45 #include <sys/kernel.h>
  46 #include <sys/kthread.h>
  47 #include <sys/limits.h>
  48 #include <sys/lock.h>
  49 #include <sys/malloc.h>
  50 #include <sys/module.h>
  51 #include <sys/rwlock.h>
  52 #include <sys/sglist.h>
  53 #include <sys/uio.h>
  54 #include <sys/uuid.h>
  55 #include <geom/geom.h>
  56 #include <geom/geom_int.h>
  57 #include <machine/vmparam.h>
  58 #include <vm/vm.h>
  59 #include <vm/vm_object.h>
  60 #include <vm/vm_page.h>
  61 #include <vm/vm_pager.h>
  62 #include <contrib/dev/acpica/include/acpi.h>
  63 #include <contrib/dev/acpica/include/accommon.h>
  64 #include <contrib/dev/acpica/include/acuuid.h>
  65 #include <dev/acpica/acpivar.h>
  66 #include <dev/nvdimm/nvdimm_var.h>
  67
  68 #define UUID_INITIALIZER_VOLATILE_MEMORY \
  69     {0x7305944f,0xfdda,0x44e3,0xb1,0x6c,{0x3f,0x22,0xd2,0x52,0xe5,0xd0}}
  70 #define UUID_INITIALIZER_PERSISTENT_MEMORY \
  71     {0x66f0d379,0xb4f3,0x4074,0xac,0x43,{0x0d,0x33,0x18,0xb7,0x8c,0xdb}}
  72 #define UUID_INITIALIZER_CONTROL_REGION \
  73     {0x92f701f6,0x13b4,0x405d,0x91,0x0b,{0x29,0x93,0x67,0xe8,0x23,0x4c}}
  74 #define UUID_INITIALIZER_DATA_REGION \
  75     {0x91af0530,0x5d86,0x470e,0xa6,0xb0,{0x0a,0x2d,0xb9,0x40,0x82,0x49}}
  76 #define UUID_INITIALIZER_VOLATILE_VIRTUAL_DISK \
  77     {0x77ab535a,0x45fc,0x624b,0x55,0x60,{0xf7,0xb2,0x81,0xd1,0xf9,0x6e}}
  78 #define UUID_INITIALIZER_VOLATILE_VIRTUAL_CD \
  79     {0x3d5abd30,0x4175,0x87ce,0x6d,0x64,{0xd2,0xad,0xe5,0x23,0xc4,0xbb}}
  80 #define UUID_INITIALIZER_PERSISTENT_VIRTUAL_DISK \
  81     {0x5cea02c9,0x4d07,0x69d3,0x26,0x9f,{0x44,0x96,0xfb,0xe0,0x96,0xf9}}
  82 #define UUID_INITIALIZER_PERSISTENT_VIRTUAL_CD \
  83     {0x08018188,0x42cd,0xbb48,0x10,0x0f,{0x53,0x87,0xd5,0x3d,0xed,0x3d}}
  84
  85 static struct nvdimm_SPA_uuid_list_elm {
  86         const char              *u_name;
  87         struct uuid             u_id;
  88         const bool              u_usr_acc;
  89 } nvdimm_SPA_uuid_list[] = {
  90         [SPA_TYPE_VOLATILE_MEMORY] = {
  91                 .u_name =       "VOLA MEM ",
  92                 .u_id =         UUID_INITIALIZER_VOLATILE_MEMORY,
  93                 .u_usr_acc =    true,
  94         },
  95         [SPA_TYPE_PERSISTENT_MEMORY] = {
  96                 .u_name =       "PERS MEM",
  97                 .u_id =         UUID_INITIALIZER_PERSISTENT_MEMORY,
  98                 .u_usr_acc =    true,
  99         },
 100         [SPA_TYPE_CONTROL_REGION] = {
 101                 .u_name =       "CTRL RG ",
 102                 .u_id =         UUID_INITIALIZER_CONTROL_REGION,
 103                 .u_usr_acc =    false,
 104         },
 105         [SPA_TYPE_DATA_REGION] = {
 106                 .u_name =       "DATA RG ",
 107                 .u_id =         UUID_INITIALIZER_DATA_REGION,
 108                 .u_usr_acc =    true,
 109         },
 110         [SPA_TYPE_VOLATILE_VIRTUAL_DISK] = {
 111                 .u_name =       "VIRT DSK",
 112                 .u_id =         UUID_INITIALIZER_VOLATILE_VIRTUAL_DISK,
 113                 .u_usr_acc =    true,
 114         },
 115         [SPA_TYPE_VOLATILE_VIRTUAL_CD] = {
 116                 .u_name =       "VIRT CD ",
 117                 .u_id =         UUID_INITIALIZER_VOLATILE_VIRTUAL_CD,
 118                 .u_usr_acc =    true,
 119         },
 120         [SPA_TYPE_PERSISTENT_VIRTUAL_DISK] = {
 121                 .u_name =       "PV DSK  ",
 122                 .u_id =         UUID_INITIALIZER_PERSISTENT_VIRTUAL_DISK,
 123                 .u_usr_acc =    true,
 124         },
 125         [SPA_TYPE_PERSISTENT_VIRTUAL_CD] = {
 126                 .u_name =       "PV CD   ",
 127                 .u_id =         UUID_INITIALIZER_PERSISTENT_VIRTUAL_CD,
 128                 .u_usr_acc =    true,
 129         },
 130 };
 131
 132 enum SPA_mapping_type
 133 nvdimm_spa_type_from_name(const char *name)
 134 {
 135         int j;
 136
 137         for (j = 0; j < nitems(nvdimm_SPA_uuid_list); j++) {
 138                 if (strcmp(name, nvdimm_SPA_uuid_list[j].u_name) != 0)
 139                         continue;
 140                 return (j);
 141         }
 142         return (SPA_TYPE_UNKNOWN);
 143 }
 144
 145 enum SPA_mapping_type
 146 nvdimm_spa_type_from_uuid(struct uuid *uuid)
 147 {
 148         int j;
 149
 150         for (j = 0; j < nitems(nvdimm_SPA_uuid_list); j++) {
 151                 if (uuidcmp(uuid, &nvdimm_SPA_uuid_list[j].u_id) != 0)
 152                         continue;
 153                 return (j);
 154         }
 155         return (SPA_TYPE_UNKNOWN);
 156 }
 157
 158 bool
 159 nvdimm_spa_type_user_accessible(enum SPA_mapping_type spa_type)
 160 {
 161
 162         if ((int)spa_type < 0 || spa_type >= nitems(nvdimm_SPA_uuid_list))
 163                 return (false);
 164         return (nvdimm_SPA_uuid_list[spa_type].u_usr_acc);
 165 }
 166
 167 static vm_memattr_t
 168 nvdimm_spa_memattr(uint64_t efi_mem_flags)
 169 {
 170         vm_memattr_t mode;
 171
 172         if ((efi_mem_flags & EFI_MD_ATTR_WB) != 0)
 173                 mode = VM_MEMATTR_WRITE_BACK;
 174         else if ((efi_mem_flags & EFI_MD_ATTR_WT) != 0)
 175                 mode = VM_MEMATTR_WRITE_THROUGH;
 176         else if ((efi_mem_flags & EFI_MD_ATTR_WC) != 0)
 177                 mode = VM_MEMATTR_WRITE_COMBINING;
 178         else if ((efi_mem_flags & EFI_MD_ATTR_WP) != 0)
 179                 mode = VM_MEMATTR_WRITE_PROTECTED;
 180         else if ((efi_mem_flags & EFI_MD_ATTR_UC) != 0)
 181                 mode = VM_MEMATTR_UNCACHEABLE;
 182         else {
 183                 if (bootverbose)
 184                         printf("SPA mapping attr %#lx unsupported\n",
 185                             efi_mem_flags);
 186                 mode = VM_MEMATTR_UNCACHEABLE;
 187         }
 188         return (mode);
 189 }
 190
 191 static int
 192 nvdimm_spa_uio(struct nvdimm_spa_dev *dev, struct uio *uio)
 193 {
 194         struct vm_page m, *ma;
 195         off_t off;
 196         vm_memattr_t mattr;
 197         int error, n;
 198
 199         error = 0;
 200         if (dev->spa_kva == NULL) {
 201                 mattr = dev->spa_memattr;
 202                 bzero(&m, sizeof(m));
 203                 vm_page_initfake(&m, 0, mattr);
 204                 ma = &m;
 205                 while (uio->uio_resid > 0) {
 206                         if (uio->uio_offset >= dev->spa_len)
 207                                 break;
 208                         off = dev->spa_phys_base + uio->uio_offset;
 209                         vm_page_updatefake(&m, trunc_page(off), mattr);
 210                         n = PAGE_SIZE;
 211                         if (n > uio->uio_resid)
 212                                 n = uio->uio_resid;
 213                         error = uiomove_fromphys(&ma, off & PAGE_MASK, n, uio);
 214                         if (error != 0)
 215                                 break;
 216                 }
 217         } else {
 218                 while (uio->uio_resid > 0) {
 219                         if (uio->uio_offset >= dev->spa_len)
 220                                 break;
 221                         n = INT_MAX;
 222                         if (n > uio->uio_resid)
 223                                 n = uio->uio_resid;
 224                         if (uio->uio_offset + n > dev->spa_len)
 225                                 n = dev->spa_len - uio->uio_offset;
 226                         error = uiomove((char *)dev->spa_kva + uio->uio_offset,
 227                             n, uio);
 228                         if (error != 0)
 229                                 break;
 230                 }
 231         }
 232         return (error);
 233 }
 234
 235 static int
 236 nvdimm_spa_rw(struct cdev *dev, struct uio *uio, int ioflag)
 237 {
 238
 239         return (nvdimm_spa_uio(dev->si_drv1, uio));
 240 }
 241
 242 static int
 243 nvdimm_spa_ioctl(struct cdev *cdev, u_long cmd, caddr_t data, int fflag,
 244     struct thread *td)
 245 {
 246         struct nvdimm_spa_dev *dev;
 247         int error;
 248
 249         dev = cdev->si_drv1;
 250         error = 0;
 251         switch (cmd) {
 252         case DIOCGSECTORSIZE:
 253                 *(u_int *)data = DEV_BSIZE;
 254                 break;
 255         case DIOCGMEDIASIZE:
 256                 *(off_t *)data = dev->spa_len;
 257                 break;
 258         default:
 259                 error = ENOTTY;
 260                 break;
 261         }
 262         return (error);
 263 }
 264
 265 static int
 266 nvdimm_spa_mmap_single(struct cdev *cdev, vm_ooffset_t *offset, vm_size_t size,
 267     vm_object_t *objp, int nprot)
 268 {
 269         struct nvdimm_spa_dev *dev;
 270
 271         dev = cdev->si_drv1;
 272         if (dev->spa_obj == NULL)
 273                 return (ENXIO);
 274         if (*offset >= dev->spa_len || *offset + size < *offset ||
 275             *offset + size > dev->spa_len)
 276                 return (EINVAL);
 277         vm_object_reference(dev->spa_obj);
 278         *objp = dev->spa_obj;
 279         return (0);
 280 }
 281
 282 static struct cdevsw spa_cdevsw = {
 283         .d_version =    D_VERSION,
 284         .d_flags =      D_DISK,
 285         .d_name =       "nvdimm_spa",
 286         .d_read =       nvdimm_spa_rw,
 287         .d_write =      nvdimm_spa_rw,
 288         .d_ioctl =      nvdimm_spa_ioctl,
 289         .d_mmap_single = nvdimm_spa_mmap_single,
 290 };
 291
 292 static void
 293 nvdimm_spa_g_all_unmapped(struct nvdimm_spa_dev *dev, struct bio *bp, int rw)
 294 {
 295         struct vm_page maa[bp->bio_ma_n];
 296         vm_page_t ma[bp->bio_ma_n];
 297         vm_memattr_t mattr;
 298         int i;
 299
 300         mattr = dev->spa_memattr;
 301         for (i = 0; i < nitems(ma); i++) {
 302                 bzero(&maa[i], sizeof(maa[i]));
 303                 vm_page_initfake(&maa[i], dev->spa_phys_base +
 304                     trunc_page(bp->bio_offset) + PAGE_SIZE * i, mattr);
 305                 ma[i] = &maa[i];
 306         }
 307         if (rw == BIO_READ)
 308                 pmap_copy_pages(ma, bp->bio_offset & PAGE_MASK, bp->bio_ma,
 309                     bp->bio_ma_offset, bp->bio_length);
 310         else
 311                 pmap_copy_pages(bp->bio_ma, bp->bio_ma_offset, ma,
 312                     bp->bio_offset & PAGE_MASK, bp->bio_length);
 313 }
 314
 315 static void
 316 nvdimm_spa_g_thread(void *arg)
 317 {
 318         struct g_spa *sc;
 319         struct bio *bp;
 320         struct uio auio;
 321         struct iovec aiovec;
 322         int error;
 323
 324         sc = arg;
 325         for (;;) {
 326                 mtx_lock(&sc->spa_g_mtx);
 327                 for (;;) {
 328                         bp = bioq_takefirst(&sc->spa_g_queue);
 329                         if (bp != NULL)
 330                                 break;
 331                         msleep(&sc->spa_g_queue, &sc->spa_g_mtx, PRIBIO,
 332                             "spa_g", 0);
 333                         if (!sc->spa_g_proc_run) {
 334                                 sc->spa_g_proc_exiting = true;
 335                                 wakeup(&sc->spa_g_queue);
 336                                 mtx_unlock(&sc->spa_g_mtx);
 337                                 kproc_exit(0);
 338                         }
 339                         continue;
 340                 }
 341                 mtx_unlock(&sc->spa_g_mtx);
 342                 if (bp->bio_cmd != BIO_READ && bp->bio_cmd != BIO_WRITE &&
 343                     bp->bio_cmd != BIO_FLUSH) {
 344                         error = EOPNOTSUPP;
 345                         goto completed;
 346                 }
 347
 348                 error = 0;
 349                 if (bp->bio_cmd == BIO_FLUSH) {
 350                         if (sc->dev->spa_kva != NULL) {
 351                                 pmap_large_map_wb(sc->dev->spa_kva,
 352                                     sc->dev->spa_len);
 353                         } else {
 354                                 pmap_flush_cache_phys_range(
 355                                     (vm_paddr_t)sc->dev->spa_phys_base,
 356                                     (vm_paddr_t)sc->dev->spa_phys_base +
 357                                     sc->dev->spa_len, sc->dev->spa_memattr);
 358                         }
 359                         /*
 360                          * XXX flush IMC
 361                          */
 362                         goto completed;
 363                 }
 364
 365                 if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
 366                         if (sc->dev->spa_kva != NULL) {
 367                                 aiovec.iov_base = (char *)sc->dev->spa_kva +
 368                                     bp->bio_offset;
 369                                 aiovec.iov_len = bp->bio_length;
 370                                 auio.uio_iov = &aiovec;
 371                                 auio.uio_iovcnt = 1;
 372                                 auio.uio_resid = bp->bio_length;
 373                                 auio.uio_offset = bp->bio_offset;
 374                                 auio.uio_segflg = UIO_SYSSPACE;
 375                                 auio.uio_rw = bp->bio_cmd == BIO_READ ?
 376                                     UIO_WRITE : UIO_READ;
 377                                 auio.uio_td = curthread;
 378                                 error = uiomove_fromphys(bp->bio_ma,
 379                                     bp->bio_ma_offset, bp->bio_length, &auio);
 380                                 bp->bio_resid = auio.uio_resid;
 381                         } else {
 382                                 nvdimm_spa_g_all_unmapped(sc->dev, bp,
 383                                     bp->bio_cmd);
 384                                 bp->bio_resid = bp->bio_length;
 385                                 error = 0;
 386                         }
 387                 } else {
 388                         aiovec.iov_base = bp->bio_data;
 389                         aiovec.iov_len = bp->bio_length;
 390                         auio.uio_iov = &aiovec;
 391                         auio.uio_iovcnt = 1;
 392                         auio.uio_resid = bp->bio_length;
 393                         auio.uio_offset = bp->bio_offset;
 394                         auio.uio_segflg = UIO_SYSSPACE;
 395                         auio.uio_rw = bp->bio_cmd == BIO_READ ? UIO_READ :
 396                             UIO_WRITE;
 397                         auio.uio_td = curthread;
 398                         error = nvdimm_spa_uio(sc->dev, &auio);
 399                         bp->bio_resid = auio.uio_resid;
 400                 }
 401                 bp->bio_bcount = bp->bio_length;
 402                 devstat_end_transaction_bio(sc->spa_g_devstat, bp);
 403 completed:
 404                 bp->bio_completed = bp->bio_length;
 405                 g_io_deliver(bp, error);
 406         }
 407 }
 408
 409 static void
 410 nvdimm_spa_g_start(struct bio *bp)
 411 {
 412         struct g_spa *sc;
 413
 414         sc = bp->bio_to->geom->softc;
 415         if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) {
 416                 devstat_start_transaction_bio(sc->spa_g_devstat, bp);
 417         }
 418         mtx_lock(&sc->spa_g_mtx);
 419         bioq_disksort(&sc->spa_g_queue, bp);
 420         wakeup(&sc->spa_g_queue);
 421         mtx_unlock(&sc->spa_g_mtx);
 422 }
 423
 424 static int
 425 nvdimm_spa_g_access(struct g_provider *pp, int r, int w, int e)
 426 {
 427
 428         return (0);
 429 }
 430
 431 static struct g_geom * nvdimm_spa_g_create(struct nvdimm_spa_dev *dev,
 432     const char *name);
 433 static g_ctl_destroy_geom_t nvdimm_spa_g_destroy_geom;
 434
 435 struct g_class nvdimm_spa_g_class = {
 436         .name =         "SPA",
 437         .version =      G_VERSION,
 438         .start =        nvdimm_spa_g_start,
 439         .access =       nvdimm_spa_g_access,
 440         .destroy_geom = nvdimm_spa_g_destroy_geom,
 441 };
 442 DECLARE_GEOM_CLASS(nvdimm_spa_g_class, g_spa);
 443
 444 int
 445 nvdimm_spa_init(struct SPA_mapping *spa, ACPI_NFIT_SYSTEM_ADDRESS *nfitaddr,
 446     enum SPA_mapping_type spa_type)
 447 {
 448         char *name;
 449         int error;
 450
 451         spa->spa_type = spa_type;
 452         spa->spa_nfit_idx = nfitaddr->RangeIndex;
 453         spa->dev.spa_domain =
 454             ((nfitaddr->Flags & ACPI_NFIT_PROXIMITY_VALID) != 0) ?
 455             nfitaddr->ProximityDomain : -1;
 456         spa->dev.spa_phys_base = nfitaddr->Address;
 457         spa->dev.spa_len = nfitaddr->Length;
 458         spa->dev.spa_efi_mem_flags = nfitaddr->MemoryMapping;
 459         if (bootverbose) {
 460                 printf("NVDIMM SPA%d base %#016jx len %#016jx %s fl %#jx\n",
 461                     spa->spa_nfit_idx,
 462                     (uintmax_t)spa->dev.spa_phys_base,
 463                     (uintmax_t)spa->dev.spa_len,
 464                     nvdimm_SPA_uuid_list[spa_type].u_name,
 465                     spa->dev.spa_efi_mem_flags);
 466         }
 467         spa->dev.spa_memattr = nvdimm_spa_memattr(nfitaddr->MemoryMapping);
 468         if (!nvdimm_SPA_uuid_list[spa_type].u_usr_acc)
 469                 return (0);
 470
 471         asprintf(&name, M_NVDIMM, "spa%d", spa->spa_nfit_idx);
 472         error = nvdimm_spa_dev_init(&spa->dev, name, spa->spa_nfit_idx);
 473         free(name, M_NVDIMM);
 474         return (error);
 475 }
 476
 477 int
 478 nvdimm_spa_dev_init(struct nvdimm_spa_dev *dev, const char *name, int unit)
 479 {
 480         struct make_dev_args mda;
 481         struct sglist *spa_sg;
 482         char *devname;
 483         int error, error1;
 484
 485         error1 = pmap_large_map(dev->spa_phys_base, dev->spa_len,
 486             &dev->spa_kva, dev->spa_memattr);
 487         if (error1 != 0) {
 488                 printf("NVDIMM %s cannot map into KVA, error %d\n", name,
 489                     error1);
 490                 dev->spa_kva = NULL;
 491         }
 492
 493         spa_sg = sglist_alloc(1, M_WAITOK);
 494         error = sglist_append_phys(spa_sg, dev->spa_phys_base,
 495             dev->spa_len);
 496         if (error == 0) {
 497                 dev->spa_obj = vm_pager_allocate(OBJT_SG, spa_sg, dev->spa_len,
 498                     VM_PROT_ALL, 0, NULL);
 499                 if (dev->spa_obj == NULL) {
 500                         printf("NVDIMM %s failed to alloc vm object", name);
 501                         sglist_free(spa_sg);
 502                 }
 503         } else {
 504                 printf("NVDIMM %s failed to init sglist, error %d", name,
 505                     error);
 506                 sglist_free(spa_sg);
 507         }
 508
 509         make_dev_args_init(&mda);
 510         mda.mda_flags = MAKEDEV_WAITOK | MAKEDEV_CHECKNAME;
 511         mda.mda_devsw = &spa_cdevsw;
 512         mda.mda_cr = NULL;
 513         mda.mda_uid = UID_ROOT;
 514         mda.mda_gid = GID_OPERATOR;
 515         mda.mda_mode = 0660;
 516         mda.mda_si_drv1 = dev;
 517         mda.mda_unit = unit;
 518         asprintf(&devname, M_NVDIMM, "nvdimm_%s", name);
 519         error = make_dev_s(&mda, &dev->spa_dev, "%s", devname);
 520         free(devname, M_NVDIMM);
 521         if (error != 0) {
 522                 printf("NVDIMM %s cannot create devfs node, error %d\n", name,
 523                     error);
 524                 if (error1 == 0)
 525                         error1 = error;
 526         }
 527         dev->spa_g = nvdimm_spa_g_create(dev, name);
 528         if (dev->spa_g == NULL && error1 == 0)
 529                 error1 = ENXIO;
 530         return (error1);
 531 }
 532
 533 static struct g_geom *
 534 nvdimm_spa_g_create(struct nvdimm_spa_dev *dev, const char *name)
 535 {
 536         struct g_geom *gp;
 537         struct g_spa *sc;
 538         int error;
 539
 540         gp = NULL;
 541         sc = malloc(sizeof(struct g_spa), M_NVDIMM, M_WAITOK | M_ZERO);
 542         sc->dev = dev;
 543         bioq_init(&sc->spa_g_queue);
 544         mtx_init(&sc->spa_g_mtx, "spag", NULL, MTX_DEF);
 545         sc->spa_g_proc_run = true;
 546         sc->spa_g_proc_exiting = false;
 547         error = kproc_create(nvdimm_spa_g_thread, sc, &sc->spa_g_proc, 0, 0,
 548             "g_spa");
 549         if (error != 0) {
 550                 mtx_destroy(&sc->spa_g_mtx);
 551                 free(sc, M_NVDIMM);
 552                 printf("NVDIMM %s cannot create geom worker, error %d\n", name,
 553                     error);
 554         } else {
 555                 g_topology_lock();
 556                 gp = g_new_geomf(&nvdimm_spa_g_class, "%s", name);
 557                 gp->softc = sc;
 558                 sc->spa_p = g_new_providerf(gp, "%s", name);
 559                 sc->spa_p->mediasize = dev->spa_len;
 560                 sc->spa_p->sectorsize = DEV_BSIZE;
 561                 sc->spa_p->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE |
 562                     G_PF_ACCEPT_UNMAPPED;
 563                 g_error_provider(sc->spa_p, 0);
 564                 sc->spa_g_devstat = devstat_new_entry("spa", -1, DEV_BSIZE,
 565                     DEVSTAT_ALL_SUPPORTED, DEVSTAT_TYPE_DIRECT,
 566                     DEVSTAT_PRIORITY_MAX);
 567                 g_topology_unlock();
 568         }
 569         return (gp);
 570 }
 571
 572 void
 573 nvdimm_spa_fini(struct SPA_mapping *spa)
 574 {
 575
 576         nvdimm_spa_dev_fini(&spa->dev);
 577 }
 578
 579 void
 580 nvdimm_spa_dev_fini(struct nvdimm_spa_dev *dev)
 581 {
 582
 583         if (dev->spa_g != NULL) {
 584                 g_topology_lock();
 585                 nvdimm_spa_g_destroy_geom(NULL, dev->spa_g->class, dev->spa_g);
 586                 g_topology_unlock();
 587         }
 588         if (dev->spa_dev != NULL) {
 589                 destroy_dev(dev->spa_dev);
 590                 dev->spa_dev = NULL;
 591         }
 592         vm_object_deallocate(dev->spa_obj);
 593         if (dev->spa_kva != NULL) {
 594                 pmap_large_unmap(dev->spa_kva, dev->spa_len);
 595                 dev->spa_kva = NULL;
 596         }
 597 }
 598
 599 static int
 600 nvdimm_spa_g_destroy_geom(struct gctl_req *req, struct g_class *cp,
 601     struct g_geom *gp)
 602 {
 603         struct g_spa *sc;
 604
 605         sc = gp->softc;
 606         mtx_lock(&sc->spa_g_mtx);
 607         sc->spa_g_proc_run = false;
 608         wakeup(&sc->spa_g_queue);
 609         while (!sc->spa_g_proc_exiting)
 610                 msleep(&sc->spa_g_queue, &sc->spa_g_mtx, PRIBIO, "spa_e", 0);
 611         mtx_unlock(&sc->spa_g_mtx);
 612         g_topology_assert();
 613         g_wither_geom(gp, ENXIO);
 614         sc->spa_p = NULL;
 615         if (sc->spa_g_devstat != NULL) {
 616                 devstat_remove_entry(sc->spa_g_devstat);
 617                 sc->spa_g_devstat = NULL;
 618         }
 619         mtx_destroy(&sc->spa_g_mtx);
 620         free(sc, M_NVDIMM);
 621         return (0);
 622 }