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_uuid(struct uuid *uuid)
 134 {
 135         int j;
 136
 137         for (j = 0; j < nitems(nvdimm_SPA_uuid_list); j++) {
 138                 if (uuidcmp(uuid, &nvdimm_SPA_uuid_list[j].u_id) != 0)
 139                         continue;
 140                 return (j);
 141         }
 142         return (SPA_TYPE_UNKNOWN);
 143 }
 144
 145 static vm_memattr_t
 146 nvdimm_spa_memattr(struct nvdimm_spa_dev *dev)
 147 {
 148         vm_memattr_t mode;
 149
 150         if ((dev->spa_efi_mem_flags & EFI_MD_ATTR_WB) != 0)
 151                 mode = VM_MEMATTR_WRITE_BACK;
 152         else if ((dev->spa_efi_mem_flags & EFI_MD_ATTR_WT) != 0)
 153                 mode = VM_MEMATTR_WRITE_THROUGH;
 154         else if ((dev->spa_efi_mem_flags & EFI_MD_ATTR_WC) != 0)
 155                 mode = VM_MEMATTR_WRITE_COMBINING;
 156         else if ((dev->spa_efi_mem_flags & EFI_MD_ATTR_WP) != 0)
 157                 mode = VM_MEMATTR_WRITE_PROTECTED;
 158         else if ((dev->spa_efi_mem_flags & EFI_MD_ATTR_UC) != 0)
 159                 mode = VM_MEMATTR_UNCACHEABLE;
 160         else {
 161                 if (bootverbose)
 162                         printf("SPA mapping attr %#lx unsupported\n",
 163                             dev->spa_efi_mem_flags);
 164                 mode = VM_MEMATTR_UNCACHEABLE;
 165         }
 166         return (mode);
 167 }
 168
 169 static int
 170 nvdimm_spa_uio(struct nvdimm_spa_dev *dev, struct uio *uio)
 171 {
 172         struct vm_page m, *ma;
 173         off_t off;
 174         vm_memattr_t mattr;
 175         int error, n;
 176
 177         error = 0;
 178         if (dev->spa_kva == NULL) {
 179                 mattr = nvdimm_spa_memattr(dev);
 180                 vm_page_initfake(&m, 0, mattr);
 181                 ma = &m;
 182                 while (uio->uio_resid > 0) {
 183                         if (uio->uio_offset >= dev->spa_len)
 184                                 break;
 185                         off = dev->spa_phys_base + uio->uio_offset;
 186                         vm_page_updatefake(&m, trunc_page(off), mattr);
 187                         n = PAGE_SIZE;
 188                         if (n > uio->uio_resid)
 189                                 n = uio->uio_resid;
 190                         error = uiomove_fromphys(&ma, off & PAGE_MASK, n, uio);
 191                         if (error != 0)
 192                                 break;
 193                 }
 194         } else {
 195                 while (uio->uio_resid > 0) {
 196                         if (uio->uio_offset >= dev->spa_len)
 197                                 break;
 198                         n = INT_MAX;
 199                         if (n > uio->uio_resid)
 200                                 n = uio->uio_resid;
 201                         if (uio->uio_offset + n > dev->spa_len)
 202                                 n = dev->spa_len - uio->uio_offset;
 203                         error = uiomove((char *)dev->spa_kva + uio->uio_offset,
 204                             n, uio);
 205                         if (error != 0)
 206                                 break;
 207                 }
 208         }
 209         return (error);
 210 }
 211
 212 static int
 213 nvdimm_spa_rw(struct cdev *dev, struct uio *uio, int ioflag)
 214 {
 215
 216         return (nvdimm_spa_uio(dev->si_drv1, uio));
 217 }
 218
 219 static int
 220 nvdimm_spa_ioctl(struct cdev *cdev, u_long cmd, caddr_t data, int fflag,
 221     struct thread *td)
 222 {
 223         struct nvdimm_spa_dev *dev;
 224         int error;
 225
 226         dev = cdev->si_drv1;
 227         error = 0;
 228         switch (cmd) {
 229         case DIOCGSECTORSIZE:
 230                 *(u_int *)data = DEV_BSIZE;
 231                 break;
 232         case DIOCGMEDIASIZE:
 233                 *(off_t *)data = dev->spa_len;
 234                 break;
 235         default:
 236                 error = ENOTTY;
 237                 break;
 238         }
 239         return (error);
 240 }
 241
 242 static int
 243 nvdimm_spa_mmap_single(struct cdev *cdev, vm_ooffset_t *offset, vm_size_t size,
 244     vm_object_t *objp, int nprot)
 245 {
 246         struct nvdimm_spa_dev *dev;
 247
 248         dev = cdev->si_drv1;
 249         if (dev->spa_obj == NULL)
 250                 return (ENXIO);
 251         if (*offset >= dev->spa_len || *offset + size < *offset ||
 252             *offset + size > dev->spa_len)
 253                 return (EINVAL);
 254         vm_object_reference(dev->spa_obj);
 255         *objp = dev->spa_obj;
 256         return (0);
 257 }
 258
 259 static struct cdevsw spa_cdevsw = {
 260         .d_version =    D_VERSION,
 261         .d_flags =      D_DISK,
 262         .d_name =       "nvdimm_spa",
 263         .d_read =       nvdimm_spa_rw,
 264         .d_write =      nvdimm_spa_rw,
 265         .d_ioctl =      nvdimm_spa_ioctl,
 266         .d_mmap_single = nvdimm_spa_mmap_single,
 267 };
 268
 269 static void
 270 nvdimm_spa_g_all_unmapped(struct nvdimm_spa_dev *dev, struct bio *bp, int rw)
 271 {
 272         struct vm_page maa[bp->bio_ma_n];
 273         vm_page_t ma[bp->bio_ma_n];
 274         vm_memattr_t mattr;
 275         int i;
 276
 277         mattr = nvdimm_spa_memattr(dev);
 278         for (i = 0; i < nitems(ma); i++) {
 279                 maa[i].flags = 0;
 280                 vm_page_initfake(&maa[i], dev->spa_phys_base +
 281                     trunc_page(bp->bio_offset) + PAGE_SIZE * i, mattr);
 282                 ma[i] = &maa[i];
 283         }
 284         if (rw == BIO_READ)
 285                 pmap_copy_pages(ma, bp->bio_offset & PAGE_MASK, bp->bio_ma,
 286                     bp->bio_ma_offset, bp->bio_length);
 287         else
 288                 pmap_copy_pages(bp->bio_ma, bp->bio_ma_offset, ma,
 289                     bp->bio_offset & PAGE_MASK, bp->bio_length);
 290 }
 291
 292 static void
 293 nvdimm_spa_g_thread(void *arg)
 294 {
 295         struct g_spa *sc;
 296         struct bio *bp;
 297         struct uio auio;
 298         struct iovec aiovec;
 299         int error;
 300
 301         sc = arg;
 302         for (;;) {
 303                 mtx_lock(&sc->spa_g_mtx);
 304                 for (;;) {
 305                         bp = bioq_takefirst(&sc->spa_g_queue);
 306                         if (bp != NULL)
 307                                 break;
 308                         msleep(&sc->spa_g_queue, &sc->spa_g_mtx, PRIBIO,
 309                             "spa_g", 0);
 310                         if (!sc->spa_g_proc_run) {
 311                                 sc->spa_g_proc_exiting = true;
 312                                 wakeup(&sc->spa_g_queue);
 313                                 mtx_unlock(&sc->spa_g_mtx);
 314                                 kproc_exit(0);
 315                         }
 316                         continue;
 317                 }
 318                 mtx_unlock(&sc->spa_g_mtx);
 319                 if (bp->bio_cmd != BIO_READ && bp->bio_cmd != BIO_WRITE &&
 320                     bp->bio_cmd != BIO_FLUSH) {
 321                         error = EOPNOTSUPP;
 322                         goto completed;
 323                 }
 324
 325                 error = 0;
 326                 if (bp->bio_cmd == BIO_FLUSH) {
 327                         if (sc->dev->spa_kva != NULL) {
 328                                 pmap_large_map_wb(sc->dev->spa_kva,
 329                                     sc->dev->spa_len);
 330                         } else {
 331                                 pmap_flush_cache_phys_range(
 332                                     (vm_paddr_t)sc->dev->spa_phys_base,
 333                                     (vm_paddr_t)sc->dev->spa_phys_base +
 334                                     sc->dev->spa_len,
 335                                     nvdimm_spa_memattr(sc->dev));
 336                         }
 337                         /*
 338                          * XXX flush IMC
 339                          */
 340                         goto completed;
 341                 }
 342
 343                 if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
 344                         if (sc->dev->spa_kva != NULL) {
 345                                 aiovec.iov_base = (char *)sc->dev->spa_kva +
 346                                     bp->bio_offset;
 347                                 aiovec.iov_len = bp->bio_length;
 348                                 auio.uio_iov = &aiovec;
 349                                 auio.uio_iovcnt = 1;
 350                                 auio.uio_resid = bp->bio_length;
 351                                 auio.uio_offset = bp->bio_offset;
 352                                 auio.uio_segflg = UIO_SYSSPACE;
 353                                 auio.uio_rw = bp->bio_cmd == BIO_READ ?
 354                                     UIO_WRITE : UIO_READ;
 355                                 auio.uio_td = curthread;
 356                                 error = uiomove_fromphys(bp->bio_ma,
 357                                     bp->bio_ma_offset, bp->bio_length, &auio);
 358                                 bp->bio_resid = auio.uio_resid;
 359                         } else {
 360                                 nvdimm_spa_g_all_unmapped(sc->dev, bp,
 361                                     bp->bio_cmd);
 362                                 bp->bio_resid = bp->bio_length;
 363                                 error = 0;
 364                         }
 365                 } else {
 366                         aiovec.iov_base = bp->bio_data;
 367                         aiovec.iov_len = bp->bio_length;
 368                         auio.uio_iov = &aiovec;
 369                         auio.uio_iovcnt = 1;
 370                         auio.uio_resid = bp->bio_length;
 371                         auio.uio_offset = bp->bio_offset;
 372                         auio.uio_segflg = UIO_SYSSPACE;
 373                         auio.uio_rw = bp->bio_cmd == BIO_READ ? UIO_READ :
 374                             UIO_WRITE;
 375                         auio.uio_td = curthread;
 376                         error = nvdimm_spa_uio(sc->dev, &auio);
 377                         bp->bio_resid = auio.uio_resid;
 378                 }
 379                 bp->bio_bcount = bp->bio_length;
 380                 devstat_end_transaction_bio(sc->spa_g_devstat, bp);
 381 completed:
 382                 bp->bio_completed = bp->bio_length;
 383                 g_io_deliver(bp, error);
 384         }
 385 }
 386
 387 static void
 388 nvdimm_spa_g_start(struct bio *bp)
 389 {
 390         struct g_spa *sc;
 391
 392         sc = bp->bio_to->geom->softc;
 393         if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) {
 394                 mtx_lock(&sc->spa_g_stat_mtx);
 395                 devstat_start_transaction_bio(sc->spa_g_devstat, bp);
 396                 mtx_unlock(&sc->spa_g_stat_mtx);
 397         }
 398         mtx_lock(&sc->spa_g_mtx);
 399         bioq_disksort(&sc->spa_g_queue, bp);
 400         wakeup(&sc->spa_g_queue);
 401         mtx_unlock(&sc->spa_g_mtx);
 402 }
 403
 404 static int
 405 nvdimm_spa_g_access(struct g_provider *pp, int r, int w, int e)
 406 {
 407
 408         return (0);
 409 }
 410
 411 static struct g_geom * nvdimm_spa_g_create(struct nvdimm_spa_dev *dev,
 412     const char *name);
 413 static g_ctl_destroy_geom_t nvdimm_spa_g_destroy_geom;
 414
 415 struct g_class nvdimm_spa_g_class = {
 416         .name =         "SPA",
 417         .version =      G_VERSION,
 418         .start =        nvdimm_spa_g_start,
 419         .access =       nvdimm_spa_g_access,
 420         .destroy_geom = nvdimm_spa_g_destroy_geom,
 421 };
 422 DECLARE_GEOM_CLASS(nvdimm_spa_g_class, g_spa);
 423
 424 int
 425 nvdimm_spa_init(struct SPA_mapping *spa, ACPI_NFIT_SYSTEM_ADDRESS *nfitaddr,
 426     enum SPA_mapping_type spa_type)
 427 {
 428         char *name;
 429         int error;
 430
 431         spa->spa_type = spa_type;
 432         spa->spa_nfit_idx = nfitaddr->RangeIndex;
 433         spa->dev.spa_domain =
 434             ((nfitaddr->Flags & ACPI_NFIT_PROXIMITY_VALID) != 0) ?
 435             nfitaddr->ProximityDomain : -1;
 436         spa->dev.spa_phys_base = nfitaddr->Address;
 437         spa->dev.spa_len = nfitaddr->Length;
 438         spa->dev.spa_efi_mem_flags = nfitaddr->MemoryMapping;
 439         if (bootverbose) {
 440                 printf("NVDIMM SPA%d base %#016jx len %#016jx %s fl %#jx\n",
 441                     spa->spa_nfit_idx,
 442                     (uintmax_t)spa->dev.spa_phys_base,
 443                     (uintmax_t)spa->dev.spa_len,
 444                     nvdimm_SPA_uuid_list[spa_type].u_name,
 445                     spa->dev.spa_efi_mem_flags);
 446         }
 447         if (!nvdimm_SPA_uuid_list[spa_type].u_usr_acc)
 448                 return (0);
 449
 450         asprintf(&name, M_NVDIMM, "spa%d", spa->spa_nfit_idx);
 451         error = nvdimm_spa_dev_init(&spa->dev, name);
 452         free(name, M_NVDIMM);
 453         return (error);
 454 }
 455
 456 int
 457 nvdimm_spa_dev_init(struct nvdimm_spa_dev *dev, const char *name)
 458 {
 459         struct make_dev_args mda;
 460         struct sglist *spa_sg;
 461         char *devname;
 462         int error, error1;
 463
 464         error1 = pmap_large_map(dev->spa_phys_base, dev->spa_len,
 465             &dev->spa_kva, nvdimm_spa_memattr(dev));
 466         if (error1 != 0) {
 467                 printf("NVDIMM %s cannot map into KVA, error %d\n", name,
 468                     error1);
 469                 dev->spa_kva = NULL;
 470         }
 471
 472         spa_sg = sglist_alloc(1, M_WAITOK);
 473         error = sglist_append_phys(spa_sg, dev->spa_phys_base,
 474             dev->spa_len);
 475         if (error == 0) {
 476                 dev->spa_obj = vm_pager_allocate(OBJT_SG, spa_sg, dev->spa_len,
 477                     VM_PROT_ALL, 0, NULL);
 478                 if (dev->spa_obj == NULL) {
 479                         printf("NVDIMM %s failed to alloc vm object", name);
 480                         sglist_free(spa_sg);
 481                 }
 482         } else {
 483                 printf("NVDIMM %s failed to init sglist, error %d", name,
 484                     error);
 485                 sglist_free(spa_sg);
 486         }
 487
 488         make_dev_args_init(&mda);
 489         mda.mda_flags = MAKEDEV_WAITOK | MAKEDEV_CHECKNAME;
 490         mda.mda_devsw = &spa_cdevsw;
 491         mda.mda_cr = NULL;
 492         mda.mda_uid = UID_ROOT;
 493         mda.mda_gid = GID_OPERATOR;
 494         mda.mda_mode = 0660;
 495         mda.mda_si_drv1 = dev;
 496         asprintf(&devname, M_NVDIMM, "nvdimm_%s", name);
 497         error = make_dev_s(&mda, &dev->spa_dev, "%s", devname);
 498         free(devname, M_NVDIMM);
 499         if (error != 0) {
 500                 printf("NVDIMM %s cannot create devfs node, error %d\n", name,
 501                     error);
 502                 if (error1 == 0)
 503                         error1 = error;
 504         }
 505         dev->spa_g = nvdimm_spa_g_create(dev, name);
 506         if (dev->spa_g == NULL && error1 == 0)
 507                 error1 = ENXIO;
 508         return (error1);
 509 }
 510
 511 static struct g_geom *
 512 nvdimm_spa_g_create(struct nvdimm_spa_dev *dev, const char *name)
 513 {
 514         struct g_geom *gp;
 515         struct g_spa *sc;
 516         int error;
 517
 518         gp = NULL;
 519         sc = malloc(sizeof(struct g_spa), M_NVDIMM, M_WAITOK | M_ZERO);
 520         sc->dev = dev;
 521         bioq_init(&sc->spa_g_queue);
 522         mtx_init(&sc->spa_g_mtx, "spag", NULL, MTX_DEF);
 523         mtx_init(&sc->spa_g_stat_mtx, "spagst", NULL, MTX_DEF);
 524         sc->spa_g_proc_run = true;
 525         sc->spa_g_proc_exiting = false;
 526         error = kproc_create(nvdimm_spa_g_thread, sc, &sc->spa_g_proc, 0, 0,
 527             "g_spa");
 528         if (error != 0) {
 529                 mtx_destroy(&sc->spa_g_mtx);
 530                 mtx_destroy(&sc->spa_g_stat_mtx);
 531                 free(sc, M_NVDIMM);
 532                 printf("NVDIMM %s cannot create geom worker, error %d\n", name,
 533                     error);
 534         } else {
 535                 g_topology_lock();
 536                 gp = g_new_geomf(&nvdimm_spa_g_class, "%s", name);
 537                 gp->softc = sc;
 538                 sc->spa_p = g_new_providerf(gp, "%s", name);
 539                 sc->spa_p->mediasize = dev->spa_len;
 540                 sc->spa_p->sectorsize = DEV_BSIZE;
 541                 sc->spa_p->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE |
 542                     G_PF_ACCEPT_UNMAPPED;
 543                 g_error_provider(sc->spa_p, 0);
 544                 sc->spa_g_devstat = devstat_new_entry("spa", -1, DEV_BSIZE,
 545                     DEVSTAT_ALL_SUPPORTED, DEVSTAT_TYPE_DIRECT,
 546                     DEVSTAT_PRIORITY_MAX);
 547                 g_topology_unlock();
 548         }
 549         return (gp);
 550 }
 551
 552 void
 553 nvdimm_spa_fini(struct SPA_mapping *spa)
 554 {
 555
 556         nvdimm_spa_dev_fini(&spa->dev);
 557 }
 558
 559 void
 560 nvdimm_spa_dev_fini(struct nvdimm_spa_dev *dev)
 561 {
 562
 563         if (dev->spa_g != NULL) {
 564                 g_topology_lock();
 565                 nvdimm_spa_g_destroy_geom(NULL, dev->spa_g->class, dev->spa_g);
 566                 g_topology_unlock();
 567         }
 568         if (dev->spa_dev != NULL) {
 569                 destroy_dev(dev->spa_dev);
 570                 dev->spa_dev = NULL;
 571         }
 572         vm_object_deallocate(dev->spa_obj);
 573         if (dev->spa_kva != NULL) {
 574                 pmap_large_unmap(dev->spa_kva, dev->spa_len);
 575                 dev->spa_kva = NULL;
 576         }
 577 }
 578
 579 static int
 580 nvdimm_spa_g_destroy_geom(struct gctl_req *req, struct g_class *cp,
 581     struct g_geom *gp)
 582 {
 583         struct g_spa *sc;
 584
 585         sc = gp->softc;
 586         mtx_lock(&sc->spa_g_mtx);
 587         sc->spa_g_proc_run = false;
 588         wakeup(&sc->spa_g_queue);
 589         while (!sc->spa_g_proc_exiting)
 590                 msleep(&sc->spa_g_queue, &sc->spa_g_mtx, PRIBIO, "spa_e", 0);
 591         mtx_unlock(&sc->spa_g_mtx);
 592         g_topology_assert();
 593         g_wither_geom(gp, ENXIO);
 594         sc->spa_p = NULL;
 595         if (sc->spa_g_devstat != NULL) {
 596                 devstat_remove_entry(sc->spa_g_devstat);
 597                 sc->spa_g_devstat = NULL;
 598         }
 599         mtx_destroy(&sc->spa_g_mtx);
 600         mtx_destroy(&sc->spa_g_stat_mtx);
 601         free(sc, M_NVDIMM);
 602         return (0);
 603 }