sys/dev/nvdimm/nvdimm_spa.c

   1 /*-
   2  * Copyright (c) 2017, 2018 The FreeBSD Foundation
   3  * All rights reserved.
   4  *
   5  * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
   6  * under sponsorship from the FreeBSD Foundation.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include "opt_acpi.h"
  34 #include "opt_ddb.h"
  35
  36 #include <sys/param.h>
  37 #include <sys/systm.h>
  38 #include <sys/bio.h>
  39 #include <sys/bus.h>
  40 #include <sys/conf.h>
  41 #include <sys/devicestat.h>
  42 #include <sys/disk.h>
  43 #include <sys/efi.h>
  44 #include <sys/kernel.h>
  45 #include <sys/kthread.h>
  46 #include <sys/limits.h>
  47 #include <sys/lock.h>
  48 #include <sys/malloc.h>
  49 #include <sys/module.h>
  50 #include <sys/rwlock.h>
  51 #include <sys/sglist.h>
  52 #include <sys/uio.h>
  53 #include <sys/uuid.h>
  54 #include <geom/geom.h>
  55 #include <geom/geom_int.h>
  56 #include <machine/vmparam.h>
  57 #include <vm/vm.h>
  58 #include <vm/vm_object.h>
  59 #include <vm/vm_page.h>
  60 #include <vm/vm_pager.h>
  61 #include <contrib/dev/acpica/include/acpi.h>
  62 #include <contrib/dev/acpica/include/accommon.h>
  63 #include <contrib/dev/acpica/include/acuuid.h>
  64 #include <dev/acpica/acpivar.h>
  65 #include <dev/nvdimm/nvdimm_var.h>
  66
  67 struct SPA_mapping *spa_mappings;
  68 int spa_mappings_cnt;
  69
  70 static int
  71 nvdimm_spa_count(void *nfitsubtbl __unused, void *arg)
  72 {
  73         int *cnt;
  74
  75         cnt = arg;
  76         (*cnt)++;
  77         return (0);
  78 }
  79
  80 static struct nvdimm_SPA_uuid_list_elm {
  81         const char              *u_name;
  82         const char              *u_id_str;
  83         struct uuid             u_id;
  84         const bool              u_usr_acc;
  85 } nvdimm_SPA_uuid_list[] = {
  86         [SPA_TYPE_VOLATILE_MEMORY] = {
  87                 .u_name =       "VOLA MEM ",
  88                 .u_id_str =     UUID_VOLATILE_MEMORY,
  89                 .u_usr_acc =    true,
  90         },
  91         [SPA_TYPE_PERSISTENT_MEMORY] = {
  92                 .u_name =       "PERS MEM",
  93                 .u_id_str =     UUID_PERSISTENT_MEMORY,
  94                 .u_usr_acc =    true,
  95         },
  96         [SPA_TYPE_CONTROL_REGION] = {
  97                 .u_name =       "CTRL RG ",
  98                 .u_id_str =     UUID_CONTROL_REGION,
  99                 .u_usr_acc =    false,
 100         },
 101         [SPA_TYPE_DATA_REGION] = {
 102                 .u_name =       "DATA RG ",
 103                 .u_id_str =     UUID_DATA_REGION,
 104                 .u_usr_acc =    true,
 105         },
 106         [SPA_TYPE_VOLATILE_VIRTUAL_DISK] = {
 107                 .u_name =       "VIRT DSK",
 108                 .u_id_str =     UUID_VOLATILE_VIRTUAL_DISK,
 109                 .u_usr_acc =    true,
 110         },
 111         [SPA_TYPE_VOLATILE_VIRTUAL_CD] = {
 112                 .u_name =       "VIRT CD ",
 113                 .u_id_str =     UUID_VOLATILE_VIRTUAL_CD,
 114                 .u_usr_acc =    true,
 115         },
 116         [SPA_TYPE_PERSISTENT_VIRTUAL_DISK] = {
 117                 .u_name =       "PV DSK  ",
 118                 .u_id_str =     UUID_PERSISTENT_VIRTUAL_DISK,
 119                 .u_usr_acc =    true,
 120         },
 121         [SPA_TYPE_PERSISTENT_VIRTUAL_CD] = {
 122                 .u_name =       "PV CD   ",
 123                 .u_id_str =     UUID_PERSISTENT_VIRTUAL_CD,
 124                 .u_usr_acc =    true,
 125         },
 126 };
 127
 128 static vm_memattr_t
 129 nvdimm_spa_memattr(struct SPA_mapping *spa)
 130 {
 131         vm_memattr_t mode;
 132
 133         if ((spa->spa_efi_mem_flags & EFI_MD_ATTR_WB) != 0)
 134                 mode = VM_MEMATTR_WRITE_BACK;
 135         else if ((spa->spa_efi_mem_flags & EFI_MD_ATTR_WT) != 0)
 136                 mode = VM_MEMATTR_WRITE_THROUGH;
 137         else if ((spa->spa_efi_mem_flags & EFI_MD_ATTR_WC) != 0)
 138                 mode = VM_MEMATTR_WRITE_COMBINING;
 139         else if ((spa->spa_efi_mem_flags & EFI_MD_ATTR_WP) != 0)
 140                 mode = VM_MEMATTR_WRITE_PROTECTED;
 141         else if ((spa->spa_efi_mem_flags & EFI_MD_ATTR_UC) != 0)
 142                 mode = VM_MEMATTR_UNCACHEABLE;
 143         else {
 144                 if (bootverbose)
 145                         printf("SPA%d mapping attr unsupported\n",
 146                             spa->spa_nfit_idx);
 147                 mode = VM_MEMATTR_UNCACHEABLE;
 148         }
 149         return (mode);
 150 }
 151
 152 static int
 153 nvdimm_spa_uio(struct SPA_mapping *spa, struct uio *uio)
 154 {
 155         struct vm_page m, *ma;
 156         off_t off;
 157         vm_memattr_t mattr;
 158         int error, n;
 159
 160         error = 0;
 161         if (spa->spa_kva == NULL) {
 162                 mattr = nvdimm_spa_memattr(spa);
 163                 vm_page_initfake(&m, 0, mattr);
 164                 ma = &m;
 165                 while (uio->uio_resid > 0) {
 166                         if (uio->uio_offset >= spa->spa_len)
 167                                 break;
 168                         off = spa->spa_phys_base + uio->uio_offset;
 169                         vm_page_updatefake(&m, trunc_page(off), mattr);
 170                         n = PAGE_SIZE;
 171                         if (n > uio->uio_resid)
 172                                 n = uio->uio_resid;
 173                         error = uiomove_fromphys(&ma, off & PAGE_MASK, n, uio);
 174                         if (error != 0)
 175                                 break;
 176                 }
 177         } else {
 178                 while (uio->uio_resid > 0) {
 179                         if (uio->uio_offset >= spa->spa_len)
 180                                 break;
 181                         n = INT_MAX;
 182                         if (n > uio->uio_resid)
 183                                 n = uio->uio_resid;
 184                         if (uio->uio_offset + n > spa->spa_len)
 185                                 n = spa->spa_len - uio->uio_offset;
 186                         error = uiomove((char *)spa->spa_kva + uio->uio_offset,
 187                             n, uio);
 188                         if (error != 0)
 189                                 break;
 190                 }
 191         }
 192         return (error);
 193 }
 194
 195 static int
 196 nvdimm_spa_rw(struct cdev *dev, struct uio *uio, int ioflag)
 197 {
 198
 199         return (nvdimm_spa_uio(dev->si_drv1, uio));
 200 }
 201
 202 static int
 203 nvdimm_spa_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
 204     struct thread *td)
 205 {
 206         struct SPA_mapping *spa;
 207         int error;
 208
 209         spa = dev->si_drv1;
 210         error = 0;
 211         switch (cmd) {
 212         case DIOCGSECTORSIZE:
 213                 *(u_int *)data = DEV_BSIZE;
 214                 break;
 215         case DIOCGMEDIASIZE:
 216                 *(off_t *)data = spa->spa_len;
 217                 break;
 218         default:
 219                 error = ENOTTY;
 220                 break;
 221         }
 222         return (error);
 223 }
 224
 225 static int
 226 nvdimm_spa_mmap_single(struct cdev *dev, vm_ooffset_t *offset, vm_size_t size,
 227     vm_object_t *objp, int nprot)
 228 {
 229         struct SPA_mapping *spa;
 230
 231         spa = dev->si_drv1;
 232         if (spa->spa_obj == NULL)
 233                 return (ENXIO);
 234         if (*offset >= spa->spa_len || *offset + size < *offset ||
 235             *offset + size > spa->spa_len)
 236                 return (EINVAL);
 237         vm_object_reference(spa->spa_obj);
 238         *objp = spa->spa_obj;
 239         return (0);
 240 }
 241
 242 static struct cdevsw spa_cdevsw = {
 243         .d_version =    D_VERSION,
 244         .d_flags =      D_DISK,
 245         .d_name =       "nvdimm_spa",
 246         .d_read =       nvdimm_spa_rw,
 247         .d_write =      nvdimm_spa_rw,
 248         .d_ioctl =      nvdimm_spa_ioctl,
 249         .d_mmap_single = nvdimm_spa_mmap_single,
 250 };
 251
 252 static void
 253 nvdimm_spa_g_all_unmapped(struct SPA_mapping *spa, struct bio *bp,
 254     int rw)
 255 {
 256         struct vm_page maa[bp->bio_ma_n];
 257         vm_page_t ma[bp->bio_ma_n];
 258         vm_memattr_t mattr;
 259         int i;
 260
 261         mattr = nvdimm_spa_memattr(spa);
 262         for (i = 0; i < nitems(ma); i++) {
 263                 maa[i].flags = 0;
 264                 vm_page_initfake(&maa[i], spa->spa_phys_base +
 265                     trunc_page(bp->bio_offset) + PAGE_SIZE * i, mattr);
 266                 ma[i] = &maa[i];
 267         }
 268         if (rw == BIO_READ)
 269                 pmap_copy_pages(ma, bp->bio_offset & PAGE_MASK, bp->bio_ma,
 270                     bp->bio_ma_offset, bp->bio_length);
 271         else
 272                 pmap_copy_pages(bp->bio_ma, bp->bio_ma_offset, ma,
 273                     bp->bio_offset & PAGE_MASK, bp->bio_length);
 274 }
 275
 276 static void
 277 nvdimm_spa_g_thread(void *arg)
 278 {
 279         struct SPA_mapping *spa;
 280         struct bio *bp;
 281         struct uio auio;
 282         struct iovec aiovec;
 283         int error;
 284
 285         spa = arg;
 286         for (;;) {
 287                 mtx_lock(&spa->spa_g_mtx);
 288                 for (;;) {
 289                         bp = bioq_takefirst(&spa->spa_g_queue);
 290                         if (bp != NULL)
 291                                 break;
 292                         msleep(&spa->spa_g_queue, &spa->spa_g_mtx, PRIBIO,
 293                             "spa_g", 0);
 294                         if (!spa->spa_g_proc_run) {
 295                                 spa->spa_g_proc_exiting = true;
 296                                 wakeup(&spa->spa_g_queue);
 297                                 mtx_unlock(&spa->spa_g_mtx);
 298                                 kproc_exit(0);
 299                         }
 300                         continue;
 301                 }
 302                 mtx_unlock(&spa->spa_g_mtx);
 303                 if (bp->bio_cmd != BIO_READ && bp->bio_cmd != BIO_WRITE &&
 304                     bp->bio_cmd != BIO_FLUSH) {
 305                         error = EOPNOTSUPP;
 306                         goto completed;
 307                 }
 308
 309                 error = 0;
 310                 if (bp->bio_cmd == BIO_FLUSH) {
 311                         if (spa->spa_kva != NULL) {
 312                                 pmap_large_map_wb(spa->spa_kva, spa->spa_len);
 313                         } else {
 314                                 pmap_flush_cache_phys_range(
 315                                     (vm_paddr_t)spa->spa_phys_base,
 316                                     (vm_paddr_t)spa->spa_phys_base +
 317                                     spa->spa_len, nvdimm_spa_memattr(spa));
 318                         }
 319                         /*
 320                          * XXX flush IMC
 321                          */
 322                         goto completed;
 323                 }
 324
 325                 if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
 326                         if (spa->spa_kva != NULL) {
 327                                 aiovec.iov_base = (char *)spa->spa_kva +
 328                                     bp->bio_offset;
 329                                 aiovec.iov_len = bp->bio_length;
 330                                 auio.uio_iov = &aiovec;
 331                                 auio.uio_iovcnt = 1;
 332                                 auio.uio_resid = bp->bio_length;
 333                                 auio.uio_offset = bp->bio_offset;
 334                                 auio.uio_segflg = UIO_SYSSPACE;
 335                                 auio.uio_rw = bp->bio_cmd == BIO_READ ?
 336                                     UIO_WRITE : UIO_READ;
 337                                 auio.uio_td = curthread;
 338                                 error = uiomove_fromphys(bp->bio_ma,
 339                                     bp->bio_ma_offset, bp->bio_length, &auio);
 340                                 bp->bio_resid = auio.uio_resid;
 341                         } else {
 342                                 nvdimm_spa_g_all_unmapped(spa, bp, bp->bio_cmd);
 343                                 bp->bio_resid = bp->bio_length;
 344                                 error = 0;
 345                         }
 346                 } else {
 347                         aiovec.iov_base = bp->bio_data;
 348                         aiovec.iov_len = bp->bio_length;
 349                         auio.uio_iov = &aiovec;
 350                         auio.uio_iovcnt = 1;
 351                         auio.uio_resid = bp->bio_length;
 352                         auio.uio_offset = bp->bio_offset;
 353                         auio.uio_segflg = UIO_SYSSPACE;
 354                         auio.uio_rw = bp->bio_cmd == BIO_READ ? UIO_READ :
 355                             UIO_WRITE;
 356                         auio.uio_td = curthread;
 357                         error = nvdimm_spa_uio(spa, &auio);
 358                         bp->bio_resid = auio.uio_resid;
 359                 }
 360                 bp->bio_bcount = bp->bio_length;
 361                 devstat_end_transaction_bio(spa->spa_g_devstat, bp);
 362 completed:
 363                 bp->bio_completed = bp->bio_length;
 364                 g_io_deliver(bp, error);
 365         }
 366 }
 367
 368 static void
 369 nvdimm_spa_g_start(struct bio *bp)
 370 {
 371         struct SPA_mapping *spa;
 372
 373         spa = bp->bio_to->geom->softc;
 374         if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) {
 375                 mtx_lock(&spa->spa_g_stat_mtx);
 376                 devstat_start_transaction_bio(spa->spa_g_devstat, bp);
 377                 mtx_unlock(&spa->spa_g_stat_mtx);
 378         }
 379         mtx_lock(&spa->spa_g_mtx);
 380         bioq_disksort(&spa->spa_g_queue, bp);
 381         wakeup(&spa->spa_g_queue);
 382         mtx_unlock(&spa->spa_g_mtx);
 383 }
 384
 385 static int
 386 nvdimm_spa_g_access(struct g_provider *pp, int r, int w, int e)
 387 {
 388
 389         return (0);
 390 }
 391
 392 static g_init_t nvdimm_spa_g_init;
 393 static g_fini_t nvdimm_spa_g_fini;
 394
 395 struct g_class nvdimm_spa_g_class = {
 396         .name =         "SPA",
 397         .version =      G_VERSION,
 398         .start =        nvdimm_spa_g_start,
 399         .access =       nvdimm_spa_g_access,
 400         .init =         nvdimm_spa_g_init,
 401         .fini =         nvdimm_spa_g_fini,
 402 };
 403 DECLARE_GEOM_CLASS(nvdimm_spa_g_class, g_spa);
 404
 405 static int
 406 nvdimm_spa_init_one(struct SPA_mapping *spa, ACPI_NFIT_SYSTEM_ADDRESS *nfitaddr,
 407     int spa_type)
 408 {
 409         struct make_dev_args mda;
 410         struct sglist *spa_sg;
 411         int error, error1;
 412
 413         spa->spa_type = spa_type;
 414         spa->spa_domain = ((nfitaddr->Flags & ACPI_NFIT_PROXIMITY_VALID) != 0) ?
 415             nfitaddr->ProximityDomain : -1;
 416         spa->spa_nfit_idx = nfitaddr->RangeIndex;
 417         spa->spa_phys_base = nfitaddr->Address;
 418         spa->spa_len = nfitaddr->Length;
 419         spa->spa_efi_mem_flags = nfitaddr->MemoryMapping;
 420         if (bootverbose) {
 421                 printf("NVDIMM SPA%d base %#016jx len %#016jx %s fl %#jx\n",
 422                     spa->spa_nfit_idx,
 423                     (uintmax_t)spa->spa_phys_base, (uintmax_t)spa->spa_len,
 424                     nvdimm_SPA_uuid_list[spa_type].u_name,
 425                     spa->spa_efi_mem_flags);
 426         }
 427         if (!nvdimm_SPA_uuid_list[spa_type].u_usr_acc)
 428                 return (0);
 429
 430         error1 = pmap_large_map(spa->spa_phys_base, spa->spa_len,
 431             &spa->spa_kva, nvdimm_spa_memattr(spa));
 432         if (error1 != 0) {
 433                 printf("NVDIMM SPA%d cannot map into KVA, error %d\n",
 434                     spa->spa_nfit_idx, error1);
 435                 spa->spa_kva = NULL;
 436         }
 437
 438         spa_sg = sglist_alloc(1, M_WAITOK);
 439         error = sglist_append_phys(spa_sg, spa->spa_phys_base,
 440             spa->spa_len);
 441         if (error == 0) {
 442                 spa->spa_obj = vm_pager_allocate(OBJT_SG, spa_sg, spa->spa_len,
 443                     VM_PROT_ALL, 0, NULL);
 444                 if (spa->spa_obj == NULL) {
 445                         printf("NVDIMM SPA%d failed to alloc vm object",
 446                             spa->spa_nfit_idx);
 447                         sglist_free(spa_sg);
 448                 }
 449         } else {
 450                 printf("NVDIMM SPA%d failed to init sglist, error %d",
 451                     spa->spa_nfit_idx, error);
 452                 sglist_free(spa_sg);
 453         }
 454
 455         make_dev_args_init(&mda);
 456         mda.mda_flags = MAKEDEV_WAITOK | MAKEDEV_CHECKNAME;
 457         mda.mda_devsw = &spa_cdevsw;
 458         mda.mda_cr = NULL;
 459         mda.mda_uid = UID_ROOT;
 460         mda.mda_gid = GID_OPERATOR;
 461         mda.mda_mode = 0660;
 462         mda.mda_si_drv1 = spa;
 463         error = make_dev_s(&mda, &spa->spa_dev, "nvdimm_spa%d",
 464             spa->spa_nfit_idx);
 465         if (error != 0) {
 466                 printf("NVDIMM SPA%d cannot create devfs node, error %d\n",
 467                     spa->spa_nfit_idx, error);
 468                 if (error1 == 0)
 469                         error1 = error;
 470         }
 471
 472         bioq_init(&spa->spa_g_queue);
 473         mtx_init(&spa->spa_g_mtx, "spag", NULL, MTX_DEF);
 474         mtx_init(&spa->spa_g_stat_mtx, "spagst", NULL, MTX_DEF);
 475         spa->spa_g_proc_run = true;
 476         spa->spa_g_proc_exiting = false;
 477         error = kproc_create(nvdimm_spa_g_thread, spa, &spa->spa_g_proc, 0, 0,
 478             "g_spa%d", spa->spa_nfit_idx);
 479         if (error != 0) {
 480                 printf("NVDIMM SPA%d cannot create geom worker, error %d\n",
 481                     spa->spa_nfit_idx, error);
 482                 if (error1 == 0)
 483                         error1 = error;
 484         } else {
 485                 g_topology_assert();
 486                 spa->spa_g = g_new_geomf(&nvdimm_spa_g_class, "spa%d",
 487                     spa->spa_nfit_idx);
 488                 spa->spa_g->softc = spa;
 489                 spa->spa_p = g_new_providerf(spa->spa_g, "spa%d",
 490                     spa->spa_nfit_idx);
 491                 spa->spa_p->mediasize = spa->spa_len;
 492                 spa->spa_p->sectorsize = DEV_BSIZE;
 493                 spa->spa_p->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE |
 494                     G_PF_ACCEPT_UNMAPPED;
 495                 g_error_provider(spa->spa_p, 0);
 496                 spa->spa_g_devstat = devstat_new_entry("spa", spa->spa_nfit_idx,
 497                     DEV_BSIZE, DEVSTAT_ALL_SUPPORTED, DEVSTAT_TYPE_DIRECT,
 498                     DEVSTAT_PRIORITY_MAX);
 499         }
 500         return (error1);
 501 }
 502
 503 static void
 504 nvdimm_spa_fini_one(struct SPA_mapping *spa)
 505 {
 506
 507         mtx_lock(&spa->spa_g_mtx);
 508         spa->spa_g_proc_run = false;
 509         wakeup(&spa->spa_g_queue);
 510         while (!spa->spa_g_proc_exiting)
 511                 msleep(&spa->spa_g_queue, &spa->spa_g_mtx, PRIBIO, "spa_e", 0);
 512         mtx_unlock(&spa->spa_g_mtx);
 513         if (spa->spa_g != NULL) {
 514                 g_topology_lock();
 515                 g_wither_geom(spa->spa_g, ENXIO);
 516                 g_topology_unlock();
 517                 spa->spa_g = NULL;
 518                 spa->spa_p = NULL;
 519         }
 520         if (spa->spa_g_devstat != NULL) {
 521                 devstat_remove_entry(spa->spa_g_devstat);
 522                 spa->spa_g_devstat = NULL;
 523         }
 524         if (spa->spa_dev != NULL) {
 525                 destroy_dev(spa->spa_dev);
 526                 spa->spa_dev = NULL;
 527         }
 528         vm_object_deallocate(spa->spa_obj);
 529         if (spa->spa_kva != NULL) {
 530                 pmap_large_unmap(spa->spa_kva, spa->spa_len);
 531                 spa->spa_kva = NULL;
 532         }
 533         mtx_destroy(&spa->spa_g_mtx);
 534         mtx_destroy(&spa->spa_g_stat_mtx);
 535 }
 536
 537 static int
 538 nvdimm_spa_parse(void *nfitsubtbl, void *arg)
 539 {
 540         ACPI_NFIT_SYSTEM_ADDRESS *nfitaddr;
 541         struct SPA_mapping *spa;
 542         int error, *i, j;
 543
 544         i = arg;
 545         spa = &spa_mappings[*i];
 546         nfitaddr = nfitsubtbl;
 547
 548         for (j = 0; j < nitems(nvdimm_SPA_uuid_list); j++) {
 549                 /* XXXKIB: is ACPI UUID representation compatible ? */
 550                 if (uuidcmp((struct uuid *)&nfitaddr->RangeGuid,
 551                     &nvdimm_SPA_uuid_list[j].u_id) != 0)
 552                         continue;
 553                 error = nvdimm_spa_init_one(spa, nfitaddr, j);
 554                 if (error != 0)
 555                         nvdimm_spa_fini_one(spa);
 556                 break;
 557         }
 558         if (j == nitems(nvdimm_SPA_uuid_list) && bootverbose) {
 559                 printf("Unknown SPA UUID %d ", nfitaddr->RangeIndex);
 560                 printf_uuid((struct uuid *)&nfitaddr->RangeGuid);
 561                 printf("\n");
 562         }
 563         (*i)++;
 564         return (0);
 565 }
 566
 567 static int
 568 nvdimm_spa_init1(ACPI_TABLE_NFIT *nfitbl)
 569 {
 570         struct nvdimm_SPA_uuid_list_elm *sle;
 571         int error, i;
 572
 573         for (i = 0; i < nitems(nvdimm_SPA_uuid_list); i++) {
 574                 sle = &nvdimm_SPA_uuid_list[i];
 575                 error = parse_uuid(sle->u_id_str, &sle->u_id);
 576                 if (error != 0) {
 577                         if (bootverbose)
 578                                 printf("nvdimm_identify: error %d parsing "
 579                                     "known SPA UUID %d %s\n", error, i,
 580                                     sle->u_id_str);
 581                         return (error);
 582                 }
 583         }
 584
 585         error = nvdimm_iterate_nfit(nfitbl, ACPI_NFIT_TYPE_SYSTEM_ADDRESS,
 586             nvdimm_spa_count, &spa_mappings_cnt);
 587         if (error != 0)
 588                 return (error);
 589         spa_mappings = malloc(sizeof(struct SPA_mapping) * spa_mappings_cnt,
 590             M_NVDIMM, M_WAITOK | M_ZERO);
 591         i = 0;
 592         error = nvdimm_iterate_nfit(nfitbl, ACPI_NFIT_TYPE_SYSTEM_ADDRESS,
 593             nvdimm_spa_parse, &i);
 594         if (error != 0) {
 595                 free(spa_mappings, M_NVDIMM);
 596                 spa_mappings = NULL;
 597                 return (error);
 598         }
 599         return (0);
 600 }
 601
 602 static void
 603 nvdimm_spa_g_init(struct g_class *mp __unused)
 604 {
 605         ACPI_TABLE_NFIT *nfitbl;
 606         ACPI_STATUS status;
 607         int error;
 608
 609         spa_mappings_cnt = 0;
 610         spa_mappings = NULL;
 611         if (acpi_disabled("nvdimm"))
 612                 return;
 613         status = AcpiGetTable(ACPI_SIG_NFIT, 1, (ACPI_TABLE_HEADER **)&nfitbl);
 614         if (ACPI_FAILURE(status)) {
 615                 if (bootverbose)
 616                         printf("nvdimm_spa_g_init: cannot find NFIT\n");
 617                 return;
 618         }
 619         error = nvdimm_spa_init1(nfitbl);
 620         if (error != 0)
 621                 printf("nvdimm_spa_g_init: error %d\n", error);
 622         AcpiPutTable(&nfitbl->Header);
 623 }
 624
 625 static void
 626 nvdimm_spa_g_fini(struct g_class *mp __unused)
 627 {
 628         int i;
 629
 630         if (spa_mappings == NULL)
 631                 return;
 632         for (i = 0; i < spa_mappings_cnt; i++)
 633                 nvdimm_spa_fini_one(&spa_mappings[i]);
 634         free(spa_mappings, M_NVDIMM);
 635         spa_mappings = NULL;
 636         spa_mappings_cnt = 0;
 637 }