tools/testing/nvdimm/test/nfit.c

   1 /*
   2  * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  */
  13 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  14 #include <linux/platform_device.h>
  15 #include <linux/dma-mapping.h>
  16 #include <linux/libnvdimm.h>
  17 #include <linux/vmalloc.h>
  18 #include <linux/device.h>
  19 #include <linux/module.h>
  20 #include <linux/mutex.h>
  21 #include <linux/ndctl.h>
  22 #include <linux/sizes.h>
  23 #include <linux/list.h>
  24 #include <linux/slab.h>
  25 #include <nfit.h>
  26 #include <nd.h>
  27 #include "nfit_test.h"
  28
  29 /*
  30  * Generate an NFIT table to describe the following topology:
  31  *
  32  * BUS0: Interleaved PMEM regions, and aliasing with BLK regions
  33  *
  34  *                     (a)                       (b)            DIMM   BLK-REGION
  35  *           +----------+--------------+----------+---------+
  36  * +------+  |  blk2.0  |     pm0.0    |  blk2.1  |  pm1.0  |    0      region2
  37  * | imc0 +--+- - - - - region0 - - - -+----------+         +
  38  * +--+---+  |  blk3.0  |     pm0.0    |  blk3.1  |  pm1.0  |    1      region3
  39  *    |      +----------+--------------v----------v         v
  40  * +--+---+                            |                    |
  41  * | cpu0 |                                    region1
  42  * +--+---+                            |                    |
  43  *    |      +-------------------------^----------^         ^
  44  * +--+---+  |                 blk4.0             |  pm1.0  |    2      region4
  45  * | imc1 +--+-------------------------+----------+         +
  46  * +------+  |                 blk5.0             |  pm1.0  |    3      region5
  47  *           +-------------------------+----------+-+-------+
  48  *
  49  * +--+---+
  50  * | cpu1 |
  51  * +--+---+                   (Hotplug DIMM)
  52  *    |      +----------------------------------------------+
  53  * +--+---+  |                 blk6.0/pm7.0                 |    4      region6/7
  54  * | imc0 +--+----------------------------------------------+
  55  * +------+
  56  *
  57  *
  58  * *) In this layout we have four dimms and two memory controllers in one
  59  *    socket.  Each unique interface (BLK or PMEM) to DPA space
  60  *    is identified by a region device with a dynamically assigned id.
  61  *
  62  * *) The first portion of dimm0 and dimm1 are interleaved as REGION0.
  63  *    A single PMEM namespace "pm0.0" is created using half of the
  64  *    REGION0 SPA-range.  REGION0 spans dimm0 and dimm1.  PMEM namespace
  65  *    allocate from from the bottom of a region.  The unallocated
  66  *    portion of REGION0 aliases with REGION2 and REGION3.  That
  67  *    unallacted capacity is reclaimed as BLK namespaces ("blk2.0" and
  68  *    "blk3.0") starting at the base of each DIMM to offset (a) in those
  69  *    DIMMs.  "pm0.0", "blk2.0" and "blk3.0" are free-form readable
  70  *    names that can be assigned to a namespace.
  71  *
  72  * *) In the last portion of dimm0 and dimm1 we have an interleaved
  73  *    SPA range, REGION1, that spans those two dimms as well as dimm2
  74  *    and dimm3.  Some of REGION1 allocated to a PMEM namespace named
  75  *    "pm1.0" the rest is reclaimed in 4 BLK namespaces (for each
  76  *    dimm in the interleave set), "blk2.1", "blk3.1", "blk4.0", and
  77  *    "blk5.0".
  78  *
  79  * *) The portion of dimm2 and dimm3 that do not participate in the
  80  *    REGION1 interleaved SPA range (i.e. the DPA address below offset
  81  *    (b) are also included in the "blk4.0" and "blk5.0" namespaces.
  82  *    Note, that BLK namespaces need not be contiguous in DPA-space, and
  83  *    can consume aliased capacity from multiple interleave sets.
  84  *
  85  * BUS1: Legacy NVDIMM (single contiguous range)
  86  *
  87  *  region2
  88  * +---------------------+
  89  * |---------------------|
  90  * ||       pm2.0       ||
  91  * |---------------------|
  92  * +---------------------+
  93  *
  94  * *) A NFIT-table may describe a simple system-physical-address range
  95  *    with no BLK aliasing.  This type of region may optionally
  96  *    reference an NVDIMM.
  97  */
  98 enum {
  99         NUM_PM  = 3,
 100         NUM_DCR = 5,
 101         NUM_BDW = NUM_DCR,
 102         NUM_SPA = NUM_PM + NUM_DCR + NUM_BDW,
 103         NUM_MEM = NUM_DCR + NUM_BDW + 2 /* spa0 iset */ + 4 /* spa1 iset */,
 104         DIMM_SIZE = SZ_32M,
 105         LABEL_SIZE = SZ_128K,
 106         SPA0_SIZE = DIMM_SIZE,
 107         SPA1_SIZE = DIMM_SIZE*2,
 108         SPA2_SIZE = DIMM_SIZE,
 109         BDW_SIZE = 64 << 8,
 110         DCR_SIZE = 12,
 111         NUM_NFITS = 2, /* permit testing multiple NFITs per system */
 112 };
 113
 114 struct nfit_test_dcr {
 115         __le64 bdw_addr;
 116         __le32 bdw_status;
 117         __u8 aperature[BDW_SIZE];
 118 };
 119
 120 #define NFIT_DIMM_HANDLE(node, socket, imc, chan, dimm) \
 121         (((node & 0xfff) << 16) | ((socket & 0xf) << 12) \
 122          | ((imc & 0xf) << 8) | ((chan & 0xf) << 4) | (dimm & 0xf))
 123
 124 static u32 handle[NUM_DCR] = {
 125         [0] = NFIT_DIMM_HANDLE(0, 0, 0, 0, 0),
 126         [1] = NFIT_DIMM_HANDLE(0, 0, 0, 0, 1),
 127         [2] = NFIT_DIMM_HANDLE(0, 0, 1, 0, 0),
 128         [3] = NFIT_DIMM_HANDLE(0, 0, 1, 0, 1),
 129         [4] = NFIT_DIMM_HANDLE(0, 1, 0, 0, 0),
 130 };
 131
 132 struct nfit_test {
 133         struct acpi_nfit_desc acpi_desc;
 134         struct platform_device pdev;
 135         struct list_head resources;
 136         void *nfit_buf;
 137         dma_addr_t nfit_dma;
 138         size_t nfit_size;
 139         int num_dcr;
 140         int num_pm;
 141         void **dimm;
 142         dma_addr_t *dimm_dma;
 143         void **flush;
 144         dma_addr_t *flush_dma;
 145         void **label;
 146         dma_addr_t *label_dma;
 147         void **spa_set;
 148         dma_addr_t *spa_set_dma;
 149         struct nfit_test_dcr **dcr;
 150         dma_addr_t *dcr_dma;
 151         int (*alloc)(struct nfit_test *t);
 152         void (*setup)(struct nfit_test *t);
 153         int setup_hotplug;
 154 };
 155
 156 static struct nfit_test *to_nfit_test(struct device *dev)
 157 {
 158         struct platform_device *pdev = to_platform_device(dev);
 159
 160         return container_of(pdev, struct nfit_test, pdev);
 161 }
 162
 163 static int nfit_test_cmd_get_config_size(struct nd_cmd_get_config_size *nd_cmd,
 164                 unsigned int buf_len)
 165 {
 166         if (buf_len < sizeof(*nd_cmd))
 167                 return -EINVAL;
 168
 169         nd_cmd->status = 0;
 170         nd_cmd->config_size = LABEL_SIZE;
 171         nd_cmd->max_xfer = SZ_4K;
 172
 173         return 0;
 174 }
 175
 176 static int nfit_test_cmd_get_config_data(struct nd_cmd_get_config_data_hdr
 177                 *nd_cmd, unsigned int buf_len, void *label)
 178 {
 179         unsigned int len, offset = nd_cmd->in_offset;
 180         int rc;
 181
 182         if (buf_len < sizeof(*nd_cmd))
 183                 return -EINVAL;
 184         if (offset >= LABEL_SIZE)
 185                 return -EINVAL;
 186         if (nd_cmd->in_length + sizeof(*nd_cmd) > buf_len)
 187                 return -EINVAL;
 188
 189         nd_cmd->status = 0;
 190         len = min(nd_cmd->in_length, LABEL_SIZE - offset);
 191         memcpy(nd_cmd->out_buf, label + offset, len);
 192         rc = buf_len - sizeof(*nd_cmd) - len;
 193
 194         return rc;
 195 }
 196
 197 static int nfit_test_cmd_set_config_data(struct nd_cmd_set_config_hdr *nd_cmd,
 198                 unsigned int buf_len, void *label)
 199 {
 200         unsigned int len, offset = nd_cmd->in_offset;
 201         u32 *status;
 202         int rc;
 203
 204         if (buf_len < sizeof(*nd_cmd))
 205                 return -EINVAL;
 206         if (offset >= LABEL_SIZE)
 207                 return -EINVAL;
 208         if (nd_cmd->in_length + sizeof(*nd_cmd) + 4 > buf_len)
 209                 return -EINVAL;
 210
 211         status = (void *)nd_cmd + nd_cmd->in_length + sizeof(*nd_cmd);
 212         *status = 0;
 213         len = min(nd_cmd->in_length, LABEL_SIZE - offset);
 214         memcpy(label + offset, nd_cmd->in_buf, len);
 215         rc = buf_len - sizeof(*nd_cmd) - (len + 4);
 216
 217         return rc;
 218 }
 219
 220 static int nfit_test_cmd_ars_cap(struct nd_cmd_ars_cap *nd_cmd,
 221                 unsigned int buf_len)
 222 {
 223         if (buf_len < sizeof(*nd_cmd))
 224                 return -EINVAL;
 225
 226         nd_cmd->max_ars_out = 256;
 227         nd_cmd->status = (ND_ARS_PERSISTENT | ND_ARS_VOLATILE) << 16;
 228
 229         return 0;
 230 }
 231
 232 static int nfit_test_cmd_ars_start(struct nd_cmd_ars_start *nd_cmd,
 233                 unsigned int buf_len)
 234 {
 235         if (buf_len < sizeof(*nd_cmd))
 236                 return -EINVAL;
 237
 238         nd_cmd->status = 0;
 239
 240         return 0;
 241 }
 242
 243 static int nfit_test_cmd_ars_status(struct nd_cmd_ars_status *nd_cmd,
 244                 unsigned int buf_len)
 245 {
 246         if (buf_len < sizeof(*nd_cmd))
 247                 return -EINVAL;
 248
 249         nd_cmd->out_length = 256;
 250         nd_cmd->num_records = 0;
 251         nd_cmd->status = 0;
 252
 253         return 0;
 254 }
 255
 256 static int nfit_test_ctl(struct nvdimm_bus_descriptor *nd_desc,
 257                 struct nvdimm *nvdimm, unsigned int cmd, void *buf,
 258                 unsigned int buf_len)
 259 {
 260         struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
 261         struct nfit_test *t = container_of(acpi_desc, typeof(*t), acpi_desc);
 262         int i, rc = 0;
 263
 264         if (nvdimm) {
 265                 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
 266
 267                 if (!nfit_mem || !test_bit(cmd, &nfit_mem->dsm_mask))
 268                         return -ENOTTY;
 269
 270                 /* lookup label space for the given dimm */
 271                 for (i = 0; i < ARRAY_SIZE(handle); i++)
 272                         if (__to_nfit_memdev(nfit_mem)->device_handle ==
 273                                         handle[i])
 274                                 break;
 275                 if (i >= ARRAY_SIZE(handle))
 276                         return -ENXIO;
 277
 278                 switch (cmd) {
 279                 case ND_CMD_GET_CONFIG_SIZE:
 280                         rc = nfit_test_cmd_get_config_size(buf, buf_len);
 281                         break;
 282                 case ND_CMD_GET_CONFIG_DATA:
 283                         rc = nfit_test_cmd_get_config_data(buf, buf_len,
 284                                 t->label[i]);
 285                         break;
 286                 case ND_CMD_SET_CONFIG_DATA:
 287                         rc = nfit_test_cmd_set_config_data(buf, buf_len,
 288                                 t->label[i]);
 289                         break;
 290                 default:
 291                         return -ENOTTY;
 292                 }
 293         } else {
 294                 if (!nd_desc || !test_bit(cmd, &nd_desc->dsm_mask))
 295                         return -ENOTTY;
 296
 297                 switch (cmd) {
 298                 case ND_CMD_ARS_CAP:
 299                         rc = nfit_test_cmd_ars_cap(buf, buf_len);
 300                         break;
 301                 case ND_CMD_ARS_START:
 302                         rc = nfit_test_cmd_ars_start(buf, buf_len);
 303                         break;
 304                 case ND_CMD_ARS_STATUS:
 305                         rc = nfit_test_cmd_ars_status(buf, buf_len);
 306                         break;
 307                 default:
 308                         return -ENOTTY;
 309                 }
 310         }
 311
 312         return rc;
 313 }
 314
 315 static DEFINE_SPINLOCK(nfit_test_lock);
 316 static struct nfit_test *instances[NUM_NFITS];
 317
 318 static void release_nfit_res(void *data)
 319 {
 320         struct nfit_test_resource *nfit_res = data;
 321         struct resource *res = nfit_res->res;
 322
 323         spin_lock(&nfit_test_lock);
 324         list_del(&nfit_res->list);
 325         spin_unlock(&nfit_test_lock);
 326
 327         if (is_vmalloc_addr(nfit_res->buf))
 328                 vfree(nfit_res->buf);
 329         else
 330                 dma_free_coherent(nfit_res->dev, resource_size(res),
 331                                 nfit_res->buf, res->start);
 332         kfree(res);
 333         kfree(nfit_res);
 334 }
 335
 336 static void *__test_alloc(struct nfit_test *t, size_t size, dma_addr_t *dma,
 337                 void *buf)
 338 {
 339         struct device *dev = &t->pdev.dev;
 340         struct resource *res = kzalloc(sizeof(*res) * 2, GFP_KERNEL);
 341         struct nfit_test_resource *nfit_res = kzalloc(sizeof(*nfit_res),
 342                         GFP_KERNEL);
 343         int rc;
 344
 345         if (!res || !buf || !nfit_res)
 346                 goto err;
 347         rc = devm_add_action(dev, release_nfit_res, nfit_res);
 348         if (rc)
 349                 goto err;
 350         INIT_LIST_HEAD(&nfit_res->list);
 351         memset(buf, 0, size);
 352         nfit_res->dev = dev;
 353         nfit_res->buf = buf;
 354         nfit_res->res = res;
 355         res->start = *dma;
 356         res->end = *dma + size - 1;
 357         res->name = "NFIT";
 358         spin_lock(&nfit_test_lock);
 359         list_add(&nfit_res->list, &t->resources);
 360         spin_unlock(&nfit_test_lock);
 361
 362         return nfit_res->buf;
 363  err:
 364         if (buf && !is_vmalloc_addr(buf))
 365                 dma_free_coherent(dev, size, buf, *dma);
 366         else if (buf)
 367                 vfree(buf);
 368         kfree(res);
 369         kfree(nfit_res);
 370         return NULL;
 371 }
 372
 373 static void *test_alloc(struct nfit_test *t, size_t size, dma_addr_t *dma)
 374 {
 375         void *buf = vmalloc(size);
 376
 377         *dma = (unsigned long) buf;
 378         return __test_alloc(t, size, dma, buf);
 379 }
 380
 381 static void *test_alloc_coherent(struct nfit_test *t, size_t size,
 382                 dma_addr_t *dma)
 383 {
 384         struct device *dev = &t->pdev.dev;
 385         void *buf = dma_alloc_coherent(dev, size, dma, GFP_KERNEL);
 386
 387         return __test_alloc(t, size, dma, buf);
 388 }
 389
 390 static struct nfit_test_resource *nfit_test_lookup(resource_size_t addr)
 391 {
 392         int i;
 393
 394         for (i = 0; i < ARRAY_SIZE(instances); i++) {
 395                 struct nfit_test_resource *n, *nfit_res = NULL;
 396                 struct nfit_test *t = instances[i];
 397
 398                 if (!t)
 399                         continue;
 400                 spin_lock(&nfit_test_lock);
 401                 list_for_each_entry(n, &t->resources, list) {
 402                         if (addr >= n->res->start && (addr < n->res->start
 403                                                 + resource_size(n->res))) {
 404                                 nfit_res = n;
 405                                 break;
 406                         } else if (addr >= (unsigned long) n->buf
 407                                         && (addr < (unsigned long) n->buf
 408                                                 + resource_size(n->res))) {
 409                                 nfit_res = n;
 410                                 break;
 411                         }
 412                 }
 413                 spin_unlock(&nfit_test_lock);
 414                 if (nfit_res)
 415                         return nfit_res;
 416         }
 417
 418         return NULL;
 419 }
 420
 421 static int nfit_test0_alloc(struct nfit_test *t)
 422 {
 423         size_t nfit_size = sizeof(struct acpi_table_nfit)
 424                         + sizeof(struct acpi_nfit_system_address) * NUM_SPA
 425                         + sizeof(struct acpi_nfit_memory_map) * NUM_MEM
 426                         + sizeof(struct acpi_nfit_control_region) * NUM_DCR
 427                         + sizeof(struct acpi_nfit_data_region) * NUM_BDW
 428                         + sizeof(struct acpi_nfit_flush_address) * NUM_DCR;
 429         int i;
 430
 431         t->nfit_buf = test_alloc(t, nfit_size, &t->nfit_dma);
 432         if (!t->nfit_buf)
 433                 return -ENOMEM;
 434         t->nfit_size = nfit_size;
 435
 436         t->spa_set[0] = test_alloc_coherent(t, SPA0_SIZE, &t->spa_set_dma[0]);
 437         if (!t->spa_set[0])
 438                 return -ENOMEM;
 439
 440         t->spa_set[1] = test_alloc_coherent(t, SPA1_SIZE, &t->spa_set_dma[1]);
 441         if (!t->spa_set[1])
 442                 return -ENOMEM;
 443
 444         t->spa_set[2] = test_alloc_coherent(t, SPA0_SIZE, &t->spa_set_dma[2]);
 445         if (!t->spa_set[2])
 446                 return -ENOMEM;
 447
 448         for (i = 0; i < NUM_DCR; i++) {
 449                 t->dimm[i] = test_alloc(t, DIMM_SIZE, &t->dimm_dma[i]);
 450                 if (!t->dimm[i])
 451                         return -ENOMEM;
 452
 453                 t->label[i] = test_alloc(t, LABEL_SIZE, &t->label_dma[i]);
 454                 if (!t->label[i])
 455                         return -ENOMEM;
 456                 sprintf(t->label[i], "label%d", i);
 457
 458                 t->flush[i] = test_alloc(t, 8, &t->flush_dma[i]);
 459                 if (!t->flush[i])
 460                         return -ENOMEM;
 461         }
 462
 463         for (i = 0; i < NUM_DCR; i++) {
 464                 t->dcr[i] = test_alloc(t, LABEL_SIZE, &t->dcr_dma[i]);
 465                 if (!t->dcr[i])
 466                         return -ENOMEM;
 467         }
 468
 469         return 0;
 470 }
 471
 472 static int nfit_test1_alloc(struct nfit_test *t)
 473 {
 474         size_t nfit_size = sizeof(struct acpi_table_nfit)
 475                 + sizeof(struct acpi_nfit_system_address)
 476                 + sizeof(struct acpi_nfit_memory_map)
 477                 + sizeof(struct acpi_nfit_control_region);
 478
 479         t->nfit_buf = test_alloc(t, nfit_size, &t->nfit_dma);
 480         if (!t->nfit_buf)
 481                 return -ENOMEM;
 482         t->nfit_size = nfit_size;
 483
 484         t->spa_set[0] = test_alloc_coherent(t, SPA2_SIZE, &t->spa_set_dma[0]);
 485         if (!t->spa_set[0])
 486                 return -ENOMEM;
 487
 488         return 0;
 489 }
 490
 491 static void nfit_test_init_header(struct acpi_table_nfit *nfit, size_t size)
 492 {
 493         memcpy(nfit->header.signature, ACPI_SIG_NFIT, 4);
 494         nfit->header.length = size;
 495         nfit->header.revision = 1;
 496         memcpy(nfit->header.oem_id, "LIBND", 6);
 497         memcpy(nfit->header.oem_table_id, "TEST", 5);
 498         nfit->header.oem_revision = 1;
 499         memcpy(nfit->header.asl_compiler_id, "TST", 4);
 500         nfit->header.asl_compiler_revision = 1;
 501 }
 502
 503 static void nfit_test0_setup(struct nfit_test *t)
 504 {
 505         struct nvdimm_bus_descriptor *nd_desc;
 506         struct acpi_nfit_desc *acpi_desc;
 507         struct acpi_nfit_memory_map *memdev;
 508         void *nfit_buf = t->nfit_buf;
 509         size_t size = t->nfit_size;
 510         struct acpi_nfit_system_address *spa;
 511         struct acpi_nfit_control_region *dcr;
 512         struct acpi_nfit_data_region *bdw;
 513         struct acpi_nfit_flush_address *flush;
 514         unsigned int offset;
 515
 516         nfit_test_init_header(nfit_buf, size);
 517
 518         /*
 519          * spa0 (interleave first half of dimm0 and dimm1, note storage
 520          * does not actually alias the related block-data-window
 521          * regions)
 522          */
 523         spa = nfit_buf + sizeof(struct acpi_table_nfit);
 524         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 525         spa->header.length = sizeof(*spa);
 526         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16);
 527         spa->range_index = 0+1;
 528         spa->address = t->spa_set_dma[0];
 529         spa->length = SPA0_SIZE;
 530
 531         /*
 532          * spa1 (interleave last half of the 4 DIMMS, note storage
 533          * does not actually alias the related block-data-window
 534          * regions)
 535          */
 536         spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa);
 537         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 538         spa->header.length = sizeof(*spa);
 539         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16);
 540         spa->range_index = 1+1;
 541         spa->address = t->spa_set_dma[1];
 542         spa->length = SPA1_SIZE;
 543
 544         /* spa2 (dcr0) dimm0 */
 545         spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa) * 2;
 546         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 547         spa->header.length = sizeof(*spa);
 548         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
 549         spa->range_index = 2+1;
 550         spa->address = t->dcr_dma[0];
 551         spa->length = DCR_SIZE;
 552
 553         /* spa3 (dcr1) dimm1 */
 554         spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa) * 3;
 555         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 556         spa->header.length = sizeof(*spa);
 557         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
 558         spa->range_index = 3+1;
 559         spa->address = t->dcr_dma[1];
 560         spa->length = DCR_SIZE;
 561
 562         /* spa4 (dcr2) dimm2 */
 563         spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa) * 4;
 564         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 565         spa->header.length = sizeof(*spa);
 566         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
 567         spa->range_index = 4+1;
 568         spa->address = t->dcr_dma[2];
 569         spa->length = DCR_SIZE;
 570
 571         /* spa5 (dcr3) dimm3 */
 572         spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa) * 5;
 573         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 574         spa->header.length = sizeof(*spa);
 575         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
 576         spa->range_index = 5+1;
 577         spa->address = t->dcr_dma[3];
 578         spa->length = DCR_SIZE;
 579
 580         /* spa6 (bdw for dcr0) dimm0 */
 581         spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa) * 6;
 582         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 583         spa->header.length = sizeof(*spa);
 584         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
 585         spa->range_index = 6+1;
 586         spa->address = t->dimm_dma[0];
 587         spa->length = DIMM_SIZE;
 588
 589         /* spa7 (bdw for dcr1) dimm1 */
 590         spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa) * 7;
 591         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 592         spa->header.length = sizeof(*spa);
 593         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
 594         spa->range_index = 7+1;
 595         spa->address = t->dimm_dma[1];
 596         spa->length = DIMM_SIZE;
 597
 598         /* spa8 (bdw for dcr2) dimm2 */
 599         spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa) * 8;
 600         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 601         spa->header.length = sizeof(*spa);
 602         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
 603         spa->range_index = 8+1;
 604         spa->address = t->dimm_dma[2];
 605         spa->length = DIMM_SIZE;
 606
 607         /* spa9 (bdw for dcr3) dimm3 */
 608         spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa) * 9;
 609         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 610         spa->header.length = sizeof(*spa);
 611         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
 612         spa->range_index = 9+1;
 613         spa->address = t->dimm_dma[3];
 614         spa->length = DIMM_SIZE;
 615
 616         offset = sizeof(struct acpi_table_nfit) + sizeof(*spa) * 10;
 617         /* mem-region0 (spa0, dimm0) */
 618         memdev = nfit_buf + offset;
 619         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 620         memdev->header.length = sizeof(*memdev);
 621         memdev->device_handle = handle[0];
 622         memdev->physical_id = 0;
 623         memdev->region_id = 0;
 624         memdev->range_index = 0+1;
 625         memdev->region_index = 0+1;
 626         memdev->region_size = SPA0_SIZE/2;
 627         memdev->region_offset = t->spa_set_dma[0];
 628         memdev->address = 0;
 629         memdev->interleave_index = 0;
 630         memdev->interleave_ways = 2;
 631
 632         /* mem-region1 (spa0, dimm1) */
 633         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map);
 634         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 635         memdev->header.length = sizeof(*memdev);
 636         memdev->device_handle = handle[1];
 637         memdev->physical_id = 1;
 638         memdev->region_id = 0;
 639         memdev->range_index = 0+1;
 640         memdev->region_index = 1+1;
 641         memdev->region_size = SPA0_SIZE/2;
 642         memdev->region_offset = t->spa_set_dma[0] + SPA0_SIZE/2;
 643         memdev->address = 0;
 644         memdev->interleave_index = 0;
 645         memdev->interleave_ways = 2;
 646
 647         /* mem-region2 (spa1, dimm0) */
 648         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 2;
 649         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 650         memdev->header.length = sizeof(*memdev);
 651         memdev->device_handle = handle[0];
 652         memdev->physical_id = 0;
 653         memdev->region_id = 1;
 654         memdev->range_index = 1+1;
 655         memdev->region_index = 0+1;
 656         memdev->region_size = SPA1_SIZE/4;
 657         memdev->region_offset = t->spa_set_dma[1];
 658         memdev->address = SPA0_SIZE/2;
 659         memdev->interleave_index = 0;
 660         memdev->interleave_ways = 4;
 661
 662         /* mem-region3 (spa1, dimm1) */
 663         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 3;
 664         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 665         memdev->header.length = sizeof(*memdev);
 666         memdev->device_handle = handle[1];
 667         memdev->physical_id = 1;
 668         memdev->region_id = 1;
 669         memdev->range_index = 1+1;
 670         memdev->region_index = 1+1;
 671         memdev->region_size = SPA1_SIZE/4;
 672         memdev->region_offset = t->spa_set_dma[1] + SPA1_SIZE/4;
 673         memdev->address = SPA0_SIZE/2;
 674         memdev->interleave_index = 0;
 675         memdev->interleave_ways = 4;
 676
 677         /* mem-region4 (spa1, dimm2) */
 678         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 4;
 679         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 680         memdev->header.length = sizeof(*memdev);
 681         memdev->device_handle = handle[2];
 682         memdev->physical_id = 2;
 683         memdev->region_id = 0;
 684         memdev->range_index = 1+1;
 685         memdev->region_index = 2+1;
 686         memdev->region_size = SPA1_SIZE/4;
 687         memdev->region_offset = t->spa_set_dma[1] + 2*SPA1_SIZE/4;
 688         memdev->address = SPA0_SIZE/2;
 689         memdev->interleave_index = 0;
 690         memdev->interleave_ways = 4;
 691
 692         /* mem-region5 (spa1, dimm3) */
 693         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 5;
 694         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 695         memdev->header.length = sizeof(*memdev);
 696         memdev->device_handle = handle[3];
 697         memdev->physical_id = 3;
 698         memdev->region_id = 0;
 699         memdev->range_index = 1+1;
 700         memdev->region_index = 3+1;
 701         memdev->region_size = SPA1_SIZE/4;
 702         memdev->region_offset = t->spa_set_dma[1] + 3*SPA1_SIZE/4;
 703         memdev->address = SPA0_SIZE/2;
 704         memdev->interleave_index = 0;
 705         memdev->interleave_ways = 4;
 706
 707         /* mem-region6 (spa/dcr0, dimm0) */
 708         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 6;
 709         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 710         memdev->header.length = sizeof(*memdev);
 711         memdev->device_handle = handle[0];
 712         memdev->physical_id = 0;
 713         memdev->region_id = 0;
 714         memdev->range_index = 2+1;
 715         memdev->region_index = 0+1;
 716         memdev->region_size = 0;
 717         memdev->region_offset = 0;
 718         memdev->address = 0;
 719         memdev->interleave_index = 0;
 720         memdev->interleave_ways = 1;
 721
 722         /* mem-region7 (spa/dcr1, dimm1) */
 723         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 7;
 724         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 725         memdev->header.length = sizeof(*memdev);
 726         memdev->device_handle = handle[1];
 727         memdev->physical_id = 1;
 728         memdev->region_id = 0;
 729         memdev->range_index = 3+1;
 730         memdev->region_index = 1+1;
 731         memdev->region_size = 0;
 732         memdev->region_offset = 0;
 733         memdev->address = 0;
 734         memdev->interleave_index = 0;
 735         memdev->interleave_ways = 1;
 736
 737         /* mem-region8 (spa/dcr2, dimm2) */
 738         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 8;
 739         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 740         memdev->header.length = sizeof(*memdev);
 741         memdev->device_handle = handle[2];
 742         memdev->physical_id = 2;
 743         memdev->region_id = 0;
 744         memdev->range_index = 4+1;
 745         memdev->region_index = 2+1;
 746         memdev->region_size = 0;
 747         memdev->region_offset = 0;
 748         memdev->address = 0;
 749         memdev->interleave_index = 0;
 750         memdev->interleave_ways = 1;
 751
 752         /* mem-region9 (spa/dcr3, dimm3) */
 753         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 9;
 754         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 755         memdev->header.length = sizeof(*memdev);
 756         memdev->device_handle = handle[3];
 757         memdev->physical_id = 3;
 758         memdev->region_id = 0;
 759         memdev->range_index = 5+1;
 760         memdev->region_index = 3+1;
 761         memdev->region_size = 0;
 762         memdev->region_offset = 0;
 763         memdev->address = 0;
 764         memdev->interleave_index = 0;
 765         memdev->interleave_ways = 1;
 766
 767         /* mem-region10 (spa/bdw0, dimm0) */
 768         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 10;
 769         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 770         memdev->header.length = sizeof(*memdev);
 771         memdev->device_handle = handle[0];
 772         memdev->physical_id = 0;
 773         memdev->region_id = 0;
 774         memdev->range_index = 6+1;
 775         memdev->region_index = 0+1;
 776         memdev->region_size = 0;
 777         memdev->region_offset = 0;
 778         memdev->address = 0;
 779         memdev->interleave_index = 0;
 780         memdev->interleave_ways = 1;
 781
 782         /* mem-region11 (spa/bdw1, dimm1) */
 783         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 11;
 784         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 785         memdev->header.length = sizeof(*memdev);
 786         memdev->device_handle = handle[1];
 787         memdev->physical_id = 1;
 788         memdev->region_id = 0;
 789         memdev->range_index = 7+1;
 790         memdev->region_index = 1+1;
 791         memdev->region_size = 0;
 792         memdev->region_offset = 0;
 793         memdev->address = 0;
 794         memdev->interleave_index = 0;
 795         memdev->interleave_ways = 1;
 796
 797         /* mem-region12 (spa/bdw2, dimm2) */
 798         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 12;
 799         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 800         memdev->header.length = sizeof(*memdev);
 801         memdev->device_handle = handle[2];
 802         memdev->physical_id = 2;
 803         memdev->region_id = 0;
 804         memdev->range_index = 8+1;
 805         memdev->region_index = 2+1;
 806         memdev->region_size = 0;
 807         memdev->region_offset = 0;
 808         memdev->address = 0;
 809         memdev->interleave_index = 0;
 810         memdev->interleave_ways = 1;
 811
 812         /* mem-region13 (spa/dcr3, dimm3) */
 813         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 13;
 814         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 815         memdev->header.length = sizeof(*memdev);
 816         memdev->device_handle = handle[3];
 817         memdev->physical_id = 3;
 818         memdev->region_id = 0;
 819         memdev->range_index = 9+1;
 820         memdev->region_index = 3+1;
 821         memdev->region_size = 0;
 822         memdev->region_offset = 0;
 823         memdev->address = 0;
 824         memdev->interleave_index = 0;
 825         memdev->interleave_ways = 1;
 826
 827         offset = offset + sizeof(struct acpi_nfit_memory_map) * 14;
 828         /* dcr-descriptor0 */
 829         dcr = nfit_buf + offset;
 830         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
 831         dcr->header.length = sizeof(struct acpi_nfit_control_region);
 832         dcr->region_index = 0+1;
 833         dcr->vendor_id = 0xabcd;
 834         dcr->device_id = 0;
 835         dcr->revision_id = 1;
 836         dcr->serial_number = ~handle[0];
 837         dcr->windows = 1;
 838         dcr->window_size = DCR_SIZE;
 839         dcr->command_offset = 0;
 840         dcr->command_size = 8;
 841         dcr->status_offset = 8;
 842         dcr->status_size = 4;
 843
 844         /* dcr-descriptor1 */
 845         dcr = nfit_buf + offset + sizeof(struct acpi_nfit_control_region);
 846         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
 847         dcr->header.length = sizeof(struct acpi_nfit_control_region);
 848         dcr->region_index = 1+1;
 849         dcr->vendor_id = 0xabcd;
 850         dcr->device_id = 0;
 851         dcr->revision_id = 1;
 852         dcr->serial_number = ~handle[1];
 853         dcr->windows = 1;
 854         dcr->window_size = DCR_SIZE;
 855         dcr->command_offset = 0;
 856         dcr->command_size = 8;
 857         dcr->status_offset = 8;
 858         dcr->status_size = 4;
 859
 860         /* dcr-descriptor2 */
 861         dcr = nfit_buf + offset + sizeof(struct acpi_nfit_control_region) * 2;
 862         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
 863         dcr->header.length = sizeof(struct acpi_nfit_control_region);
 864         dcr->region_index = 2+1;
 865         dcr->vendor_id = 0xabcd;
 866         dcr->device_id = 0;
 867         dcr->revision_id = 1;
 868         dcr->serial_number = ~handle[2];
 869         dcr->windows = 1;
 870         dcr->window_size = DCR_SIZE;
 871         dcr->command_offset = 0;
 872         dcr->command_size = 8;
 873         dcr->status_offset = 8;
 874         dcr->status_size = 4;
 875
 876         /* dcr-descriptor3 */
 877         dcr = nfit_buf + offset + sizeof(struct acpi_nfit_control_region) * 3;
 878         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
 879         dcr->header.length = sizeof(struct acpi_nfit_control_region);
 880         dcr->region_index = 3+1;
 881         dcr->vendor_id = 0xabcd;
 882         dcr->device_id = 0;
 883         dcr->revision_id = 1;
 884         dcr->serial_number = ~handle[3];
 885         dcr->windows = 1;
 886         dcr->window_size = DCR_SIZE;
 887         dcr->command_offset = 0;
 888         dcr->command_size = 8;
 889         dcr->status_offset = 8;
 890         dcr->status_size = 4;
 891
 892         offset = offset + sizeof(struct acpi_nfit_control_region) * 4;
 893         /* bdw0 (spa/dcr0, dimm0) */
 894         bdw = nfit_buf + offset;
 895         bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
 896         bdw->header.length = sizeof(struct acpi_nfit_data_region);
 897         bdw->region_index = 0+1;
 898         bdw->windows = 1;
 899         bdw->offset = 0;
 900         bdw->size = BDW_SIZE;
 901         bdw->capacity = DIMM_SIZE;
 902         bdw->start_address = 0;
 903
 904         /* bdw1 (spa/dcr1, dimm1) */
 905         bdw = nfit_buf + offset + sizeof(struct acpi_nfit_data_region);
 906         bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
 907         bdw->header.length = sizeof(struct acpi_nfit_data_region);
 908         bdw->region_index = 1+1;
 909         bdw->windows = 1;
 910         bdw->offset = 0;
 911         bdw->size = BDW_SIZE;
 912         bdw->capacity = DIMM_SIZE;
 913         bdw->start_address = 0;
 914
 915         /* bdw2 (spa/dcr2, dimm2) */
 916         bdw = nfit_buf + offset + sizeof(struct acpi_nfit_data_region) * 2;
 917         bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
 918         bdw->header.length = sizeof(struct acpi_nfit_data_region);
 919         bdw->region_index = 2+1;
 920         bdw->windows = 1;
 921         bdw->offset = 0;
 922         bdw->size = BDW_SIZE;
 923         bdw->capacity = DIMM_SIZE;
 924         bdw->start_address = 0;
 925
 926         /* bdw3 (spa/dcr3, dimm3) */
 927         bdw = nfit_buf + offset + sizeof(struct acpi_nfit_data_region) * 3;
 928         bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
 929         bdw->header.length = sizeof(struct acpi_nfit_data_region);
 930         bdw->region_index = 3+1;
 931         bdw->windows = 1;
 932         bdw->offset = 0;
 933         bdw->size = BDW_SIZE;
 934         bdw->capacity = DIMM_SIZE;
 935         bdw->start_address = 0;
 936
 937         offset = offset + sizeof(struct acpi_nfit_data_region) * 4;
 938         /* flush0 (dimm0) */
 939         flush = nfit_buf + offset;
 940         flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
 941         flush->header.length = sizeof(struct acpi_nfit_flush_address);
 942         flush->device_handle = handle[0];
 943         flush->hint_count = 1;
 944         flush->hint_address[0] = t->flush_dma[0];
 945
 946         /* flush1 (dimm1) */
 947         flush = nfit_buf + offset + sizeof(struct acpi_nfit_flush_address) * 1;
 948         flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
 949         flush->header.length = sizeof(struct acpi_nfit_flush_address);
 950         flush->device_handle = handle[1];
 951         flush->hint_count = 1;
 952         flush->hint_address[0] = t->flush_dma[1];
 953
 954         /* flush2 (dimm2) */
 955         flush = nfit_buf + offset + sizeof(struct acpi_nfit_flush_address) * 2;
 956         flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
 957         flush->header.length = sizeof(struct acpi_nfit_flush_address);
 958         flush->device_handle = handle[2];
 959         flush->hint_count = 1;
 960         flush->hint_address[0] = t->flush_dma[2];
 961
 962         /* flush3 (dimm3) */
 963         flush = nfit_buf + offset + sizeof(struct acpi_nfit_flush_address) * 3;
 964         flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
 965         flush->header.length = sizeof(struct acpi_nfit_flush_address);
 966         flush->device_handle = handle[3];
 967         flush->hint_count = 1;
 968         flush->hint_address[0] = t->flush_dma[3];
 969
 970         if (t->setup_hotplug) {
 971                 offset = offset + sizeof(struct acpi_nfit_flush_address) * 4;
 972                 /* dcr-descriptor4 */
 973                 dcr = nfit_buf + offset;
 974                 dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
 975                 dcr->header.length = sizeof(struct acpi_nfit_control_region);
 976                 dcr->region_index = 4+1;
 977                 dcr->vendor_id = 0xabcd;
 978                 dcr->device_id = 0;
 979                 dcr->revision_id = 1;
 980                 dcr->serial_number = ~handle[4];
 981                 dcr->windows = 1;
 982                 dcr->window_size = DCR_SIZE;
 983                 dcr->command_offset = 0;
 984                 dcr->command_size = 8;
 985                 dcr->status_offset = 8;
 986                 dcr->status_size = 4;
 987
 988                 offset = offset + sizeof(struct acpi_nfit_control_region);
 989                 /* bdw4 (spa/dcr4, dimm4) */
 990                 bdw = nfit_buf + offset;
 991                 bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
 992                 bdw->header.length = sizeof(struct acpi_nfit_data_region);
 993                 bdw->region_index = 4+1;
 994                 bdw->windows = 1;
 995                 bdw->offset = 0;
 996                 bdw->size = BDW_SIZE;
 997                 bdw->capacity = DIMM_SIZE;
 998                 bdw->start_address = 0;
 999
1000                 offset = offset + sizeof(struct acpi_nfit_data_region);
1001                 /* spa10 (dcr4) dimm4 */
1002                 spa = nfit_buf + offset;
1003                 spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1004                 spa->header.length = sizeof(*spa);
1005                 memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
1006                 spa->range_index = 10+1;
1007                 spa->address = t->dcr_dma[4];
1008                 spa->length = DCR_SIZE;
1009
1010                 /*
1011                  * spa11 (single-dimm interleave for hotplug, note storage
1012                  * does not actually alias the related block-data-window
1013                  * regions)
1014                  */
1015                 spa = nfit_buf + offset + sizeof(*spa);
1016                 spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1017                 spa->header.length = sizeof(*spa);
1018                 memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16);
1019                 spa->range_index = 11+1;
1020                 spa->address = t->spa_set_dma[2];
1021                 spa->length = SPA0_SIZE;
1022
1023                 /* spa12 (bdw for dcr4) dimm4 */
1024                 spa = nfit_buf + offset + sizeof(*spa) * 2;
1025                 spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1026                 spa->header.length = sizeof(*spa);
1027                 memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
1028                 spa->range_index = 12+1;
1029                 spa->address = t->dimm_dma[4];
1030                 spa->length = DIMM_SIZE;
1031
1032                 offset = offset + sizeof(*spa) * 3;
1033                 /* mem-region14 (spa/dcr4, dimm4) */
1034                 memdev = nfit_buf + offset;
1035                 memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1036                 memdev->header.length = sizeof(*memdev);
1037                 memdev->device_handle = handle[4];
1038                 memdev->physical_id = 4;
1039                 memdev->region_id = 0;
1040                 memdev->range_index = 10+1;
1041                 memdev->region_index = 4+1;
1042                 memdev->region_size = 0;
1043                 memdev->region_offset = 0;
1044                 memdev->address = 0;
1045                 memdev->interleave_index = 0;
1046                 memdev->interleave_ways = 1;
1047
1048                 /* mem-region15 (spa0, dimm4) */
1049                 memdev = nfit_buf + offset +
1050                                 sizeof(struct acpi_nfit_memory_map);
1051                 memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1052                 memdev->header.length = sizeof(*memdev);
1053                 memdev->device_handle = handle[4];
1054                 memdev->physical_id = 4;
1055                 memdev->region_id = 0;
1056                 memdev->range_index = 11+1;
1057                 memdev->region_index = 4+1;
1058                 memdev->region_size = SPA0_SIZE;
1059                 memdev->region_offset = t->spa_set_dma[2];
1060                 memdev->address = 0;
1061                 memdev->interleave_index = 0;
1062                 memdev->interleave_ways = 1;
1063
1064                 /* mem-region16 (spa/dcr4, dimm4) */
1065                 memdev = nfit_buf + offset +
1066                                 sizeof(struct acpi_nfit_memory_map) * 2;
1067                 memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1068                 memdev->header.length = sizeof(*memdev);
1069                 memdev->device_handle = handle[4];
1070                 memdev->physical_id = 4;
1071                 memdev->region_id = 0;
1072                 memdev->range_index = 12+1;
1073                 memdev->region_index = 4+1;
1074                 memdev->region_size = 0;
1075                 memdev->region_offset = 0;
1076                 memdev->address = 0;
1077                 memdev->interleave_index = 0;
1078                 memdev->interleave_ways = 1;
1079
1080                 offset = offset + sizeof(struct acpi_nfit_memory_map) * 3;
1081                 /* flush3 (dimm4) */
1082                 flush = nfit_buf + offset;
1083                 flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
1084                 flush->header.length = sizeof(struct acpi_nfit_flush_address);
1085                 flush->device_handle = handle[4];
1086                 flush->hint_count = 1;
1087                 flush->hint_address[0] = t->flush_dma[4];
1088         }
1089
1090         acpi_desc = &t->acpi_desc;
1091         set_bit(ND_CMD_GET_CONFIG_SIZE, &acpi_desc->dimm_dsm_force_en);
1092         set_bit(ND_CMD_GET_CONFIG_DATA, &acpi_desc->dimm_dsm_force_en);
1093         set_bit(ND_CMD_SET_CONFIG_DATA, &acpi_desc->dimm_dsm_force_en);
1094         set_bit(ND_CMD_ARS_CAP, &acpi_desc->bus_dsm_force_en);
1095         set_bit(ND_CMD_ARS_START, &acpi_desc->bus_dsm_force_en);
1096         set_bit(ND_CMD_ARS_STATUS, &acpi_desc->bus_dsm_force_en);
1097         nd_desc = &acpi_desc->nd_desc;
1098         nd_desc->ndctl = nfit_test_ctl;
1099 }
1100
1101 static void nfit_test1_setup(struct nfit_test *t)
1102 {
1103         size_t size = t->nfit_size, offset;
1104         void *nfit_buf = t->nfit_buf;
1105         struct acpi_nfit_memory_map *memdev;
1106         struct acpi_nfit_control_region *dcr;
1107         struct acpi_nfit_system_address *spa;
1108
1109         nfit_test_init_header(nfit_buf, size);
1110
1111         offset = sizeof(struct acpi_table_nfit);
1112         /* spa0 (flat range with no bdw aliasing) */
1113         spa = nfit_buf + offset;
1114         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1115         spa->header.length = sizeof(*spa);
1116         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16);
1117         spa->range_index = 0+1;
1118         spa->address = t->spa_set_dma[0];
1119         spa->length = SPA2_SIZE;
1120
1121         offset += sizeof(*spa);
1122         /* mem-region0 (spa0, dimm0) */
1123         memdev = nfit_buf + offset;
1124         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1125         memdev->header.length = sizeof(*memdev);
1126         memdev->device_handle = 0;
1127         memdev->physical_id = 0;
1128         memdev->region_id = 0;
1129         memdev->range_index = 0+1;
1130         memdev->region_index = 0+1;
1131         memdev->region_size = SPA2_SIZE;
1132         memdev->region_offset = 0;
1133         memdev->address = 0;
1134         memdev->interleave_index = 0;
1135         memdev->interleave_ways = 1;
1136         memdev->flags = ACPI_NFIT_MEM_SAVE_FAILED | ACPI_NFIT_MEM_RESTORE_FAILED
1137                 | ACPI_NFIT_MEM_FLUSH_FAILED | ACPI_NFIT_MEM_HEALTH_OBSERVED
1138                 | ACPI_NFIT_MEM_ARMED;
1139
1140         offset += sizeof(*memdev);
1141         /* dcr-descriptor0 */
1142         dcr = nfit_buf + offset;
1143         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1144         dcr->header.length = sizeof(struct acpi_nfit_control_region);
1145         dcr->region_index = 0+1;
1146         dcr->vendor_id = 0xabcd;
1147         dcr->device_id = 0;
1148         dcr->revision_id = 1;
1149         dcr->serial_number = ~0;
1150         dcr->code = 0x201;
1151         dcr->windows = 0;
1152         dcr->window_size = 0;
1153         dcr->command_offset = 0;
1154         dcr->command_size = 0;
1155         dcr->status_offset = 0;
1156         dcr->status_size = 0;
1157 }
1158
1159 static int nfit_test_blk_do_io(struct nd_blk_region *ndbr, resource_size_t dpa,
1160                 void *iobuf, u64 len, int rw)
1161 {
1162         struct nfit_blk *nfit_blk = ndbr->blk_provider_data;
1163         struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
1164         struct nd_region *nd_region = &ndbr->nd_region;
1165         unsigned int lane;
1166
1167         lane = nd_region_acquire_lane(nd_region);
1168         if (rw)
1169                 memcpy(mmio->addr.base + dpa, iobuf, len);
1170         else {
1171                 memcpy(iobuf, mmio->addr.base + dpa, len);
1172
1173                 /* give us some some coverage of the mmio_flush_range() API */
1174                 mmio_flush_range(mmio->addr.base + dpa, len);
1175         }
1176         nd_region_release_lane(nd_region, lane);
1177
1178         return 0;
1179 }
1180
1181 static int nfit_test_probe(struct platform_device *pdev)
1182 {
1183         struct nvdimm_bus_descriptor *nd_desc;
1184         struct acpi_nfit_desc *acpi_desc;
1185         struct device *dev = &pdev->dev;
1186         struct nfit_test *nfit_test;
1187         int rc;
1188
1189         nfit_test = to_nfit_test(&pdev->dev);
1190
1191         /* common alloc */
1192         if (nfit_test->num_dcr) {
1193                 int num = nfit_test->num_dcr;
1194
1195                 nfit_test->dimm = devm_kcalloc(dev, num, sizeof(void *),
1196                                 GFP_KERNEL);
1197                 nfit_test->dimm_dma = devm_kcalloc(dev, num, sizeof(dma_addr_t),
1198                                 GFP_KERNEL);
1199                 nfit_test->flush = devm_kcalloc(dev, num, sizeof(void *),
1200                                 GFP_KERNEL);
1201                 nfit_test->flush_dma = devm_kcalloc(dev, num, sizeof(dma_addr_t),
1202                                 GFP_KERNEL);
1203                 nfit_test->label = devm_kcalloc(dev, num, sizeof(void *),
1204                                 GFP_KERNEL);
1205                 nfit_test->label_dma = devm_kcalloc(dev, num,
1206                                 sizeof(dma_addr_t), GFP_KERNEL);
1207                 nfit_test->dcr = devm_kcalloc(dev, num,
1208                                 sizeof(struct nfit_test_dcr *), GFP_KERNEL);
1209                 nfit_test->dcr_dma = devm_kcalloc(dev, num,
1210                                 sizeof(dma_addr_t), GFP_KERNEL);
1211                 if (nfit_test->dimm && nfit_test->dimm_dma && nfit_test->label
1212                                 && nfit_test->label_dma && nfit_test->dcr
1213                                 && nfit_test->dcr_dma && nfit_test->flush
1214                                 && nfit_test->flush_dma)
1215                         /* pass */;
1216                 else
1217                         return -ENOMEM;
1218         }
1219
1220         if (nfit_test->num_pm) {
1221                 int num = nfit_test->num_pm;
1222
1223                 nfit_test->spa_set = devm_kcalloc(dev, num, sizeof(void *),
1224                                 GFP_KERNEL);
1225                 nfit_test->spa_set_dma = devm_kcalloc(dev, num,
1226                                 sizeof(dma_addr_t), GFP_KERNEL);
1227                 if (nfit_test->spa_set && nfit_test->spa_set_dma)
1228                         /* pass */;
1229                 else
1230                         return -ENOMEM;
1231         }
1232
1233         /* per-nfit specific alloc */
1234         if (nfit_test->alloc(nfit_test))
1235                 return -ENOMEM;
1236
1237         nfit_test->setup(nfit_test);
1238         acpi_desc = &nfit_test->acpi_desc;
1239         acpi_desc->dev = &pdev->dev;
1240         acpi_desc->nfit = nfit_test->nfit_buf;
1241         acpi_desc->blk_do_io = nfit_test_blk_do_io;
1242         nd_desc = &acpi_desc->nd_desc;
1243         nd_desc->attr_groups = acpi_nfit_attribute_groups;
1244         acpi_desc->nvdimm_bus = nvdimm_bus_register(&pdev->dev, nd_desc);
1245         if (!acpi_desc->nvdimm_bus)
1246                 return -ENXIO;
1247
1248         INIT_LIST_HEAD(&acpi_desc->spa_maps);
1249         INIT_LIST_HEAD(&acpi_desc->spas);
1250         INIT_LIST_HEAD(&acpi_desc->dcrs);
1251         INIT_LIST_HEAD(&acpi_desc->bdws);
1252         INIT_LIST_HEAD(&acpi_desc->idts);
1253         INIT_LIST_HEAD(&acpi_desc->flushes);
1254         INIT_LIST_HEAD(&acpi_desc->memdevs);
1255         INIT_LIST_HEAD(&acpi_desc->dimms);
1256         mutex_init(&acpi_desc->spa_map_mutex);
1257         mutex_init(&acpi_desc->init_mutex);
1258
1259         rc = acpi_nfit_init(acpi_desc, nfit_test->nfit_size);
1260         if (rc) {
1261                 nvdimm_bus_unregister(acpi_desc->nvdimm_bus);
1262                 return rc;
1263         }
1264
1265         if (nfit_test->setup != nfit_test0_setup)
1266                 return 0;
1267
1268         nfit_test->setup_hotplug = 1;
1269         nfit_test->setup(nfit_test);
1270
1271         rc = acpi_nfit_init(acpi_desc, nfit_test->nfit_size);
1272         if (rc) {
1273                 nvdimm_bus_unregister(acpi_desc->nvdimm_bus);
1274                 return rc;
1275         }
1276
1277         return 0;
1278 }
1279
1280 static int nfit_test_remove(struct platform_device *pdev)
1281 {
1282         struct nfit_test *nfit_test = to_nfit_test(&pdev->dev);
1283         struct acpi_nfit_desc *acpi_desc = &nfit_test->acpi_desc;
1284
1285         nvdimm_bus_unregister(acpi_desc->nvdimm_bus);
1286
1287         return 0;
1288 }
1289
1290 static void nfit_test_release(struct device *dev)
1291 {
1292         struct nfit_test *nfit_test = to_nfit_test(dev);
1293
1294         kfree(nfit_test);
1295 }
1296
1297 static const struct platform_device_id nfit_test_id[] = {
1298         { KBUILD_MODNAME },
1299         { },
1300 };
1301
1302 static struct platform_driver nfit_test_driver = {
1303         .probe = nfit_test_probe,
1304         .remove = nfit_test_remove,
1305         .driver = {
1306                 .name = KBUILD_MODNAME,
1307         },
1308         .id_table = nfit_test_id,
1309 };
1310
1311 #ifdef CONFIG_CMA_SIZE_MBYTES
1312 #define CMA_SIZE_MBYTES CONFIG_CMA_SIZE_MBYTES
1313 #else
1314 #define CMA_SIZE_MBYTES 0
1315 #endif
1316
1317 static __init int nfit_test_init(void)
1318 {
1319         int rc, i;
1320
1321         nfit_test_setup(nfit_test_lookup);
1322
1323         for (i = 0; i < NUM_NFITS; i++) {
1324                 struct nfit_test *nfit_test;
1325                 struct platform_device *pdev;
1326                 static int once;
1327
1328                 nfit_test = kzalloc(sizeof(*nfit_test), GFP_KERNEL);
1329                 if (!nfit_test) {
1330                         rc = -ENOMEM;
1331                         goto err_register;
1332                 }
1333                 INIT_LIST_HEAD(&nfit_test->resources);
1334                 switch (i) {
1335                 case 0:
1336                         nfit_test->num_pm = NUM_PM;
1337                         nfit_test->num_dcr = NUM_DCR;
1338                         nfit_test->alloc = nfit_test0_alloc;
1339                         nfit_test->setup = nfit_test0_setup;
1340                         break;
1341                 case 1:
1342                         nfit_test->num_pm = 1;
1343                         nfit_test->alloc = nfit_test1_alloc;
1344                         nfit_test->setup = nfit_test1_setup;
1345                         break;
1346                 default:
1347                         rc = -EINVAL;
1348                         goto err_register;
1349                 }
1350                 pdev = &nfit_test->pdev;
1351                 pdev->name = KBUILD_MODNAME;
1352                 pdev->id = i;
1353                 pdev->dev.release = nfit_test_release;
1354                 rc = platform_device_register(pdev);
1355                 if (rc) {
1356                         put_device(&pdev->dev);
1357                         goto err_register;
1358                 }
1359
1360                 rc = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
1361                 if (rc)
1362                         goto err_register;
1363
1364                 instances[i] = nfit_test;
1365
1366                 if (!once++) {
1367                         dma_addr_t dma;
1368                         void *buf;
1369
1370                         buf = dma_alloc_coherent(&pdev->dev, SZ_128M, &dma,
1371                                         GFP_KERNEL);
1372                         if (!buf) {
1373                                 rc = -ENOMEM;
1374                                 dev_warn(&pdev->dev, "need 128M of free cma\n");
1375                                 goto err_register;
1376                         }
1377                         dma_free_coherent(&pdev->dev, SZ_128M, buf, dma);
1378                 }
1379         }
1380
1381         rc = platform_driver_register(&nfit_test_driver);
1382         if (rc)
1383                 goto err_register;
1384         return 0;
1385
1386  err_register:
1387         for (i = 0; i < NUM_NFITS; i++)
1388                 if (instances[i])
1389                         platform_device_unregister(&instances[i]->pdev);
1390         nfit_test_teardown();
1391         return rc;
1392 }
1393
1394 static __exit void nfit_test_exit(void)
1395 {
1396         int i;
1397
1398         platform_driver_unregister(&nfit_test_driver);
1399         for (i = 0; i < NUM_NFITS; i++)
1400                 platform_device_unregister(&instances[i]->pdev);
1401         nfit_test_teardown();
1402 }
1403
1404 module_init(nfit_test_init);
1405 module_exit(nfit_test_exit);
1406 MODULE_LICENSE("GPL v2");
1407 MODULE_AUTHOR("Intel Corporation");