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/workqueue.h>
  17 #include <linux/libnvdimm.h>
  18 #include <linux/vmalloc.h>
  19 #include <linux/device.h>
  20 #include <linux/module.h>
  21 #include <linux/mutex.h>
  22 #include <linux/ndctl.h>
  23 #include <linux/sizes.h>
  24 #include <linux/list.h>
  25 #include <linux/slab.h>
  26 #include <nfit.h>
  27 #include <nd.h>
  28 #include "nfit_test.h"
  29
  30 /*
  31  * Generate an NFIT table to describe the following topology:
  32  *
  33  * BUS0: Interleaved PMEM regions, and aliasing with BLK regions
  34  *
  35  *                     (a)                       (b)            DIMM   BLK-REGION
  36  *           +----------+--------------+----------+---------+
  37  * +------+  |  blk2.0  |     pm0.0    |  blk2.1  |  pm1.0  |    0      region2
  38  * | imc0 +--+- - - - - region0 - - - -+----------+         +
  39  * +--+---+  |  blk3.0  |     pm0.0    |  blk3.1  |  pm1.0  |    1      region3
  40  *    |      +----------+--------------v----------v         v
  41  * +--+---+                            |                    |
  42  * | cpu0 |                                    region1
  43  * +--+---+                            |                    |
  44  *    |      +-------------------------^----------^         ^
  45  * +--+---+  |                 blk4.0             |  pm1.0  |    2      region4
  46  * | imc1 +--+-------------------------+----------+         +
  47  * +------+  |                 blk5.0             |  pm1.0  |    3      region5
  48  *           +-------------------------+----------+-+-------+
  49  *
  50  * +--+---+
  51  * | cpu1 |
  52  * +--+---+                   (Hotplug DIMM)
  53  *    |      +----------------------------------------------+
  54  * +--+---+  |                 blk6.0/pm7.0                 |    4      region6/7
  55  * | imc0 +--+----------------------------------------------+
  56  * +------+
  57  *
  58  *
  59  * *) In this layout we have four dimms and two memory controllers in one
  60  *    socket.  Each unique interface (BLK or PMEM) to DPA space
  61  *    is identified by a region device with a dynamically assigned id.
  62  *
  63  * *) The first portion of dimm0 and dimm1 are interleaved as REGION0.
  64  *    A single PMEM namespace "pm0.0" is created using half of the
  65  *    REGION0 SPA-range.  REGION0 spans dimm0 and dimm1.  PMEM namespace
  66  *    allocate from from the bottom of a region.  The unallocated
  67  *    portion of REGION0 aliases with REGION2 and REGION3.  That
  68  *    unallacted capacity is reclaimed as BLK namespaces ("blk2.0" and
  69  *    "blk3.0") starting at the base of each DIMM to offset (a) in those
  70  *    DIMMs.  "pm0.0", "blk2.0" and "blk3.0" are free-form readable
  71  *    names that can be assigned to a namespace.
  72  *
  73  * *) In the last portion of dimm0 and dimm1 we have an interleaved
  74  *    SPA range, REGION1, that spans those two dimms as well as dimm2
  75  *    and dimm3.  Some of REGION1 allocated to a PMEM namespace named
  76  *    "pm1.0" the rest is reclaimed in 4 BLK namespaces (for each
  77  *    dimm in the interleave set), "blk2.1", "blk3.1", "blk4.0", and
  78  *    "blk5.0".
  79  *
  80  * *) The portion of dimm2 and dimm3 that do not participate in the
  81  *    REGION1 interleaved SPA range (i.e. the DPA address below offset
  82  *    (b) are also included in the "blk4.0" and "blk5.0" namespaces.
  83  *    Note, that BLK namespaces need not be contiguous in DPA-space, and
  84  *    can consume aliased capacity from multiple interleave sets.
  85  *
  86  * BUS1: Legacy NVDIMM (single contiguous range)
  87  *
  88  *  region2
  89  * +---------------------+
  90  * |---------------------|
  91  * ||       pm2.0       ||
  92  * |---------------------|
  93  * +---------------------+
  94  *
  95  * *) A NFIT-table may describe a simple system-physical-address range
  96  *    with no BLK aliasing.  This type of region may optionally
  97  *    reference an NVDIMM.
  98  */
  99 enum {
 100         NUM_PM  = 3,
 101         NUM_DCR = 5,
 102         NUM_HINTS = 8,
 103         NUM_BDW = NUM_DCR,
 104         NUM_SPA = NUM_PM + NUM_DCR + NUM_BDW,
 105         NUM_MEM = NUM_DCR + NUM_BDW + 2 /* spa0 iset */ + 4 /* spa1 iset */,
 106         DIMM_SIZE = SZ_32M,
 107         LABEL_SIZE = SZ_128K,
 108         SPA_VCD_SIZE = SZ_4M,
 109         SPA0_SIZE = DIMM_SIZE,
 110         SPA1_SIZE = DIMM_SIZE*2,
 111         SPA2_SIZE = DIMM_SIZE,
 112         BDW_SIZE = 64 << 8,
 113         DCR_SIZE = 12,
 114         NUM_NFITS = 2, /* permit testing multiple NFITs per system */
 115 };
 116
 117 struct nfit_test_dcr {
 118         __le64 bdw_addr;
 119         __le32 bdw_status;
 120         __u8 aperature[BDW_SIZE];
 121 };
 122
 123 #define NFIT_DIMM_HANDLE(node, socket, imc, chan, dimm) \
 124         (((node & 0xfff) << 16) | ((socket & 0xf) << 12) \
 125          | ((imc & 0xf) << 8) | ((chan & 0xf) << 4) | (dimm & 0xf))
 126
 127 static u32 handle[NUM_DCR] = {
 128         [0] = NFIT_DIMM_HANDLE(0, 0, 0, 0, 0),
 129         [1] = NFIT_DIMM_HANDLE(0, 0, 0, 0, 1),
 130         [2] = NFIT_DIMM_HANDLE(0, 0, 1, 0, 0),
 131         [3] = NFIT_DIMM_HANDLE(0, 0, 1, 0, 1),
 132         [4] = NFIT_DIMM_HANDLE(0, 1, 0, 0, 0),
 133 };
 134
 135 struct nfit_test {
 136         struct acpi_nfit_desc acpi_desc;
 137         struct platform_device pdev;
 138         struct list_head resources;
 139         void *nfit_buf;
 140         dma_addr_t nfit_dma;
 141         size_t nfit_size;
 142         int num_dcr;
 143         int num_pm;
 144         void **dimm;
 145         dma_addr_t *dimm_dma;
 146         void **flush;
 147         dma_addr_t *flush_dma;
 148         void **label;
 149         dma_addr_t *label_dma;
 150         void **spa_set;
 151         dma_addr_t *spa_set_dma;
 152         struct nfit_test_dcr **dcr;
 153         dma_addr_t *dcr_dma;
 154         int (*alloc)(struct nfit_test *t);
 155         void (*setup)(struct nfit_test *t);
 156         int setup_hotplug;
 157         struct ars_state {
 158                 struct nd_cmd_ars_status *ars_status;
 159                 unsigned long deadline;
 160                 spinlock_t lock;
 161         } ars_state;
 162 };
 163
 164 static struct nfit_test *to_nfit_test(struct device *dev)
 165 {
 166         struct platform_device *pdev = to_platform_device(dev);
 167
 168         return container_of(pdev, struct nfit_test, pdev);
 169 }
 170
 171 static int nfit_test_cmd_get_config_size(struct nd_cmd_get_config_size *nd_cmd,
 172                 unsigned int buf_len)
 173 {
 174         if (buf_len < sizeof(*nd_cmd))
 175                 return -EINVAL;
 176
 177         nd_cmd->status = 0;
 178         nd_cmd->config_size = LABEL_SIZE;
 179         nd_cmd->max_xfer = SZ_4K;
 180
 181         return 0;
 182 }
 183
 184 static int nfit_test_cmd_get_config_data(struct nd_cmd_get_config_data_hdr
 185                 *nd_cmd, unsigned int buf_len, void *label)
 186 {
 187         unsigned int len, offset = nd_cmd->in_offset;
 188         int rc;
 189
 190         if (buf_len < sizeof(*nd_cmd))
 191                 return -EINVAL;
 192         if (offset >= LABEL_SIZE)
 193                 return -EINVAL;
 194         if (nd_cmd->in_length + sizeof(*nd_cmd) > buf_len)
 195                 return -EINVAL;
 196
 197         nd_cmd->status = 0;
 198         len = min(nd_cmd->in_length, LABEL_SIZE - offset);
 199         memcpy(nd_cmd->out_buf, label + offset, len);
 200         rc = buf_len - sizeof(*nd_cmd) - len;
 201
 202         return rc;
 203 }
 204
 205 static int nfit_test_cmd_set_config_data(struct nd_cmd_set_config_hdr *nd_cmd,
 206                 unsigned int buf_len, void *label)
 207 {
 208         unsigned int len, offset = nd_cmd->in_offset;
 209         u32 *status;
 210         int rc;
 211
 212         if (buf_len < sizeof(*nd_cmd))
 213                 return -EINVAL;
 214         if (offset >= LABEL_SIZE)
 215                 return -EINVAL;
 216         if (nd_cmd->in_length + sizeof(*nd_cmd) + 4 > buf_len)
 217                 return -EINVAL;
 218
 219         status = (void *)nd_cmd + nd_cmd->in_length + sizeof(*nd_cmd);
 220         *status = 0;
 221         len = min(nd_cmd->in_length, LABEL_SIZE - offset);
 222         memcpy(label + offset, nd_cmd->in_buf, len);
 223         rc = buf_len - sizeof(*nd_cmd) - (len + 4);
 224
 225         return rc;
 226 }
 227
 228 #define NFIT_TEST_ARS_RECORDS 4
 229 #define NFIT_TEST_CLEAR_ERR_UNIT 256
 230
 231 static int nfit_test_cmd_ars_cap(struct nd_cmd_ars_cap *nd_cmd,
 232                 unsigned int buf_len)
 233 {
 234         if (buf_len < sizeof(*nd_cmd))
 235                 return -EINVAL;
 236
 237         nd_cmd->max_ars_out = sizeof(struct nd_cmd_ars_status)
 238                 + NFIT_TEST_ARS_RECORDS * sizeof(struct nd_ars_record);
 239         nd_cmd->status = (ND_ARS_PERSISTENT | ND_ARS_VOLATILE) << 16;
 240         nd_cmd->clear_err_unit = NFIT_TEST_CLEAR_ERR_UNIT;
 241
 242         return 0;
 243 }
 244
 245 /*
 246  * Initialize the ars_state to return an ars_result 1 second in the future with
 247  * a 4K error range in the middle of the requested address range.
 248  */
 249 static void post_ars_status(struct ars_state *ars_state, u64 addr, u64 len)
 250 {
 251         struct nd_cmd_ars_status *ars_status;
 252         struct nd_ars_record *ars_record;
 253
 254         ars_state->deadline = jiffies + 1*HZ;
 255         ars_status = ars_state->ars_status;
 256         ars_status->status = 0;
 257         ars_status->out_length = sizeof(struct nd_cmd_ars_status)
 258                 + sizeof(struct nd_ars_record);
 259         ars_status->address = addr;
 260         ars_status->length = len;
 261         ars_status->type = ND_ARS_PERSISTENT;
 262         ars_status->num_records = 1;
 263         ars_record = &ars_status->records[0];
 264         ars_record->handle = 0;
 265         ars_record->err_address = addr + len / 2;
 266         ars_record->length = SZ_4K;
 267 }
 268
 269 static int nfit_test_cmd_ars_start(struct ars_state *ars_state,
 270                 struct nd_cmd_ars_start *ars_start, unsigned int buf_len,
 271                 int *cmd_rc)
 272 {
 273         if (buf_len < sizeof(*ars_start))
 274                 return -EINVAL;
 275
 276         spin_lock(&ars_state->lock);
 277         if (time_before(jiffies, ars_state->deadline)) {
 278                 ars_start->status = NFIT_ARS_START_BUSY;
 279                 *cmd_rc = -EBUSY;
 280         } else {
 281                 ars_start->status = 0;
 282                 ars_start->scrub_time = 1;
 283                 post_ars_status(ars_state, ars_start->address,
 284                                 ars_start->length);
 285                 *cmd_rc = 0;
 286         }
 287         spin_unlock(&ars_state->lock);
 288
 289         return 0;
 290 }
 291
 292 static int nfit_test_cmd_ars_status(struct ars_state *ars_state,
 293                 struct nd_cmd_ars_status *ars_status, unsigned int buf_len,
 294                 int *cmd_rc)
 295 {
 296         if (buf_len < ars_state->ars_status->out_length)
 297                 return -EINVAL;
 298
 299         spin_lock(&ars_state->lock);
 300         if (time_before(jiffies, ars_state->deadline)) {
 301                 memset(ars_status, 0, buf_len);
 302                 ars_status->status = NFIT_ARS_STATUS_BUSY;
 303                 ars_status->out_length = sizeof(*ars_status);
 304                 *cmd_rc = -EBUSY;
 305         } else {
 306                 memcpy(ars_status, ars_state->ars_status,
 307                                 ars_state->ars_status->out_length);
 308                 *cmd_rc = 0;
 309         }
 310         spin_unlock(&ars_state->lock);
 311         return 0;
 312 }
 313
 314 static int nfit_test_cmd_clear_error(struct nd_cmd_clear_error *clear_err,
 315                 unsigned int buf_len, int *cmd_rc)
 316 {
 317         const u64 mask = NFIT_TEST_CLEAR_ERR_UNIT - 1;
 318         if (buf_len < sizeof(*clear_err))
 319                 return -EINVAL;
 320
 321         if ((clear_err->address & mask) || (clear_err->length & mask))
 322                 return -EINVAL;
 323
 324         /*
 325          * Report 'all clear' success for all commands even though a new
 326          * scrub will find errors again.  This is enough to have the
 327          * error removed from the 'badblocks' tracking in the pmem
 328          * driver.
 329          */
 330         clear_err->status = 0;
 331         clear_err->cleared = clear_err->length;
 332         *cmd_rc = 0;
 333         return 0;
 334 }
 335
 336 static int nfit_test_cmd_smart(struct nd_cmd_smart *smart, unsigned int buf_len)
 337 {
 338         static const struct nd_smart_payload smart_data = {
 339                 .flags = ND_SMART_HEALTH_VALID | ND_SMART_TEMP_VALID
 340                         | ND_SMART_SPARES_VALID | ND_SMART_ALARM_VALID
 341                         | ND_SMART_USED_VALID | ND_SMART_SHUTDOWN_VALID,
 342                 .health = ND_SMART_NON_CRITICAL_HEALTH,
 343                 .temperature = 23 * 16,
 344                 .spares = 75,
 345                 .alarm_flags = ND_SMART_SPARE_TRIP | ND_SMART_TEMP_TRIP,
 346                 .life_used = 5,
 347                 .shutdown_state = 0,
 348                 .vendor_size = 0,
 349         };
 350
 351         if (buf_len < sizeof(*smart))
 352                 return -EINVAL;
 353         memcpy(smart->data, &smart_data, sizeof(smart_data));
 354         return 0;
 355 }
 356
 357 static int nfit_test_cmd_smart_threshold(struct nd_cmd_smart_threshold *smart_t,
 358                 unsigned int buf_len)
 359 {
 360         static const struct nd_smart_threshold_payload smart_t_data = {
 361                 .alarm_control = ND_SMART_SPARE_TRIP | ND_SMART_TEMP_TRIP,
 362                 .temperature = 40 * 16,
 363                 .spares = 5,
 364         };
 365
 366         if (buf_len < sizeof(*smart_t))
 367                 return -EINVAL;
 368         memcpy(smart_t->data, &smart_t_data, sizeof(smart_t_data));
 369         return 0;
 370 }
 371
 372 static int nfit_test_ctl(struct nvdimm_bus_descriptor *nd_desc,
 373                 struct nvdimm *nvdimm, unsigned int cmd, void *buf,
 374                 unsigned int buf_len, int *cmd_rc)
 375 {
 376         struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
 377         struct nfit_test *t = container_of(acpi_desc, typeof(*t), acpi_desc);
 378         unsigned int func = cmd;
 379         int i, rc = 0, __cmd_rc;
 380
 381         if (!cmd_rc)
 382                 cmd_rc = &__cmd_rc;
 383         *cmd_rc = 0;
 384
 385         if (nvdimm) {
 386                 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
 387                 unsigned long cmd_mask = nvdimm_cmd_mask(nvdimm);
 388
 389                 if (!nfit_mem)
 390                         return -ENOTTY;
 391
 392                 if (cmd == ND_CMD_CALL) {
 393                         struct nd_cmd_pkg *call_pkg = buf;
 394
 395                         buf_len = call_pkg->nd_size_in + call_pkg->nd_size_out;
 396                         buf = (void *) call_pkg->nd_payload;
 397                         func = call_pkg->nd_command;
 398                         if (call_pkg->nd_family != nfit_mem->family)
 399                                 return -ENOTTY;
 400                 }
 401
 402                 if (!test_bit(cmd, &cmd_mask)
 403                                 || !test_bit(func, &nfit_mem->dsm_mask))
 404                         return -ENOTTY;
 405
 406                 /* lookup label space for the given dimm */
 407                 for (i = 0; i < ARRAY_SIZE(handle); i++)
 408                         if (__to_nfit_memdev(nfit_mem)->device_handle ==
 409                                         handle[i])
 410                                 break;
 411                 if (i >= ARRAY_SIZE(handle))
 412                         return -ENXIO;
 413
 414                 switch (func) {
 415                 case ND_CMD_GET_CONFIG_SIZE:
 416                         rc = nfit_test_cmd_get_config_size(buf, buf_len);
 417                         break;
 418                 case ND_CMD_GET_CONFIG_DATA:
 419                         rc = nfit_test_cmd_get_config_data(buf, buf_len,
 420                                 t->label[i]);
 421                         break;
 422                 case ND_CMD_SET_CONFIG_DATA:
 423                         rc = nfit_test_cmd_set_config_data(buf, buf_len,
 424                                 t->label[i]);
 425                         break;
 426                 case ND_CMD_SMART:
 427                         rc = nfit_test_cmd_smart(buf, buf_len);
 428                         break;
 429                 case ND_CMD_SMART_THRESHOLD:
 430                         rc = nfit_test_cmd_smart_threshold(buf, buf_len);
 431                         break;
 432                 default:
 433                         return -ENOTTY;
 434                 }
 435         } else {
 436                 struct ars_state *ars_state = &t->ars_state;
 437
 438                 if (!nd_desc || !test_bit(cmd, &nd_desc->cmd_mask))
 439                         return -ENOTTY;
 440
 441                 switch (func) {
 442                 case ND_CMD_ARS_CAP:
 443                         rc = nfit_test_cmd_ars_cap(buf, buf_len);
 444                         break;
 445                 case ND_CMD_ARS_START:
 446                         rc = nfit_test_cmd_ars_start(ars_state, buf, buf_len,
 447                                         cmd_rc);
 448                         break;
 449                 case ND_CMD_ARS_STATUS:
 450                         rc = nfit_test_cmd_ars_status(ars_state, buf, buf_len,
 451                                         cmd_rc);
 452                         break;
 453                 case ND_CMD_CLEAR_ERROR:
 454                         rc = nfit_test_cmd_clear_error(buf, buf_len, cmd_rc);
 455                         break;
 456                 default:
 457                         return -ENOTTY;
 458                 }
 459         }
 460
 461         return rc;
 462 }
 463
 464 static DEFINE_SPINLOCK(nfit_test_lock);
 465 static struct nfit_test *instances[NUM_NFITS];
 466
 467 static void release_nfit_res(void *data)
 468 {
 469         struct nfit_test_resource *nfit_res = data;
 470         struct resource *res = nfit_res->res;
 471
 472         spin_lock(&nfit_test_lock);
 473         list_del(&nfit_res->list);
 474         spin_unlock(&nfit_test_lock);
 475
 476         vfree(nfit_res->buf);
 477         kfree(res);
 478         kfree(nfit_res);
 479 }
 480
 481 static void *__test_alloc(struct nfit_test *t, size_t size, dma_addr_t *dma,
 482                 void *buf)
 483 {
 484         struct device *dev = &t->pdev.dev;
 485         struct resource *res = kzalloc(sizeof(*res) * 2, GFP_KERNEL);
 486         struct nfit_test_resource *nfit_res = kzalloc(sizeof(*nfit_res),
 487                         GFP_KERNEL);
 488         int rc;
 489
 490         if (!res || !buf || !nfit_res)
 491                 goto err;
 492         rc = devm_add_action(dev, release_nfit_res, nfit_res);
 493         if (rc)
 494                 goto err;
 495         INIT_LIST_HEAD(&nfit_res->list);
 496         memset(buf, 0, size);
 497         nfit_res->dev = dev;
 498         nfit_res->buf = buf;
 499         nfit_res->res = res;
 500         res->start = *dma;
 501         res->end = *dma + size - 1;
 502         res->name = "NFIT";
 503         spin_lock(&nfit_test_lock);
 504         list_add(&nfit_res->list, &t->resources);
 505         spin_unlock(&nfit_test_lock);
 506
 507         return nfit_res->buf;
 508  err:
 509         if (buf)
 510                 vfree(buf);
 511         kfree(res);
 512         kfree(nfit_res);
 513         return NULL;
 514 }
 515
 516 static void *test_alloc(struct nfit_test *t, size_t size, dma_addr_t *dma)
 517 {
 518         void *buf = vmalloc(size);
 519
 520         *dma = (unsigned long) buf;
 521         return __test_alloc(t, size, dma, buf);
 522 }
 523
 524 static struct nfit_test_resource *nfit_test_lookup(resource_size_t addr)
 525 {
 526         int i;
 527
 528         for (i = 0; i < ARRAY_SIZE(instances); i++) {
 529                 struct nfit_test_resource *n, *nfit_res = NULL;
 530                 struct nfit_test *t = instances[i];
 531
 532                 if (!t)
 533                         continue;
 534                 spin_lock(&nfit_test_lock);
 535                 list_for_each_entry(n, &t->resources, list) {
 536                         if (addr >= n->res->start && (addr < n->res->start
 537                                                 + resource_size(n->res))) {
 538                                 nfit_res = n;
 539                                 break;
 540                         } else if (addr >= (unsigned long) n->buf
 541                                         && (addr < (unsigned long) n->buf
 542                                                 + resource_size(n->res))) {
 543                                 nfit_res = n;
 544                                 break;
 545                         }
 546                 }
 547                 spin_unlock(&nfit_test_lock);
 548                 if (nfit_res)
 549                         return nfit_res;
 550         }
 551
 552         return NULL;
 553 }
 554
 555 static int ars_state_init(struct device *dev, struct ars_state *ars_state)
 556 {
 557         ars_state->ars_status = devm_kzalloc(dev,
 558                         sizeof(struct nd_cmd_ars_status)
 559                         + sizeof(struct nd_ars_record) * NFIT_TEST_ARS_RECORDS,
 560                         GFP_KERNEL);
 561         if (!ars_state->ars_status)
 562                 return -ENOMEM;
 563         spin_lock_init(&ars_state->lock);
 564         return 0;
 565 }
 566
 567 static int nfit_test0_alloc(struct nfit_test *t)
 568 {
 569         size_t nfit_size = sizeof(struct acpi_nfit_system_address) * NUM_SPA
 570                         + sizeof(struct acpi_nfit_memory_map) * NUM_MEM
 571                         + sizeof(struct acpi_nfit_control_region) * NUM_DCR
 572                         + offsetof(struct acpi_nfit_control_region,
 573                                         window_size) * NUM_DCR
 574                         + sizeof(struct acpi_nfit_data_region) * NUM_BDW
 575                         + (sizeof(struct acpi_nfit_flush_address)
 576                                         + sizeof(u64) * NUM_HINTS) * NUM_DCR;
 577         int i;
 578
 579         t->nfit_buf = test_alloc(t, nfit_size, &t->nfit_dma);
 580         if (!t->nfit_buf)
 581                 return -ENOMEM;
 582         t->nfit_size = nfit_size;
 583
 584         t->spa_set[0] = test_alloc(t, SPA0_SIZE, &t->spa_set_dma[0]);
 585         if (!t->spa_set[0])
 586                 return -ENOMEM;
 587
 588         t->spa_set[1] = test_alloc(t, SPA1_SIZE, &t->spa_set_dma[1]);
 589         if (!t->spa_set[1])
 590                 return -ENOMEM;
 591
 592         t->spa_set[2] = test_alloc(t, SPA0_SIZE, &t->spa_set_dma[2]);
 593         if (!t->spa_set[2])
 594                 return -ENOMEM;
 595
 596         for (i = 0; i < NUM_DCR; i++) {
 597                 t->dimm[i] = test_alloc(t, DIMM_SIZE, &t->dimm_dma[i]);
 598                 if (!t->dimm[i])
 599                         return -ENOMEM;
 600
 601                 t->label[i] = test_alloc(t, LABEL_SIZE, &t->label_dma[i]);
 602                 if (!t->label[i])
 603                         return -ENOMEM;
 604                 sprintf(t->label[i], "label%d", i);
 605
 606                 t->flush[i] = test_alloc(t, max(PAGE_SIZE,
 607                                         sizeof(u64) * NUM_HINTS),
 608                                 &t->flush_dma[i]);
 609                 if (!t->flush[i])
 610                         return -ENOMEM;
 611         }
 612
 613         for (i = 0; i < NUM_DCR; i++) {
 614                 t->dcr[i] = test_alloc(t, LABEL_SIZE, &t->dcr_dma[i]);
 615                 if (!t->dcr[i])
 616                         return -ENOMEM;
 617         }
 618
 619         return ars_state_init(&t->pdev.dev, &t->ars_state);
 620 }
 621
 622 static int nfit_test1_alloc(struct nfit_test *t)
 623 {
 624         size_t nfit_size = sizeof(struct acpi_nfit_system_address) * 2
 625                 + sizeof(struct acpi_nfit_memory_map)
 626                 + offsetof(struct acpi_nfit_control_region, window_size);
 627
 628         t->nfit_buf = test_alloc(t, nfit_size, &t->nfit_dma);
 629         if (!t->nfit_buf)
 630                 return -ENOMEM;
 631         t->nfit_size = nfit_size;
 632
 633         t->spa_set[0] = test_alloc(t, SPA2_SIZE, &t->spa_set_dma[0]);
 634         if (!t->spa_set[0])
 635                 return -ENOMEM;
 636
 637         t->spa_set[1] = test_alloc(t, SPA_VCD_SIZE, &t->spa_set_dma[1]);
 638         if (!t->spa_set[1])
 639                 return -ENOMEM;
 640
 641         return ars_state_init(&t->pdev.dev, &t->ars_state);
 642 }
 643
 644 static void dcr_common_init(struct acpi_nfit_control_region *dcr)
 645 {
 646         dcr->vendor_id = 0xabcd;
 647         dcr->device_id = 0;
 648         dcr->revision_id = 1;
 649         dcr->valid_fields = 1;
 650         dcr->manufacturing_location = 0xa;
 651         dcr->manufacturing_date = cpu_to_be16(2016);
 652 }
 653
 654 static void nfit_test0_setup(struct nfit_test *t)
 655 {
 656         const int flush_hint_size = sizeof(struct acpi_nfit_flush_address)
 657                 + (sizeof(u64) * NUM_HINTS);
 658         struct acpi_nfit_desc *acpi_desc;
 659         struct acpi_nfit_memory_map *memdev;
 660         void *nfit_buf = t->nfit_buf;
 661         struct acpi_nfit_system_address *spa;
 662         struct acpi_nfit_control_region *dcr;
 663         struct acpi_nfit_data_region *bdw;
 664         struct acpi_nfit_flush_address *flush;
 665         unsigned int offset, i;
 666
 667         /*
 668          * spa0 (interleave first half of dimm0 and dimm1, note storage
 669          * does not actually alias the related block-data-window
 670          * regions)
 671          */
 672         spa = nfit_buf;
 673         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 674         spa->header.length = sizeof(*spa);
 675         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16);
 676         spa->range_index = 0+1;
 677         spa->address = t->spa_set_dma[0];
 678         spa->length = SPA0_SIZE;
 679
 680         /*
 681          * spa1 (interleave last half of the 4 DIMMS, note storage
 682          * does not actually alias the related block-data-window
 683          * regions)
 684          */
 685         spa = nfit_buf + sizeof(*spa);
 686         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 687         spa->header.length = sizeof(*spa);
 688         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16);
 689         spa->range_index = 1+1;
 690         spa->address = t->spa_set_dma[1];
 691         spa->length = SPA1_SIZE;
 692
 693         /* spa2 (dcr0) dimm0 */
 694         spa = nfit_buf + sizeof(*spa) * 2;
 695         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 696         spa->header.length = sizeof(*spa);
 697         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
 698         spa->range_index = 2+1;
 699         spa->address = t->dcr_dma[0];
 700         spa->length = DCR_SIZE;
 701
 702         /* spa3 (dcr1) dimm1 */
 703         spa = nfit_buf + sizeof(*spa) * 3;
 704         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 705         spa->header.length = sizeof(*spa);
 706         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
 707         spa->range_index = 3+1;
 708         spa->address = t->dcr_dma[1];
 709         spa->length = DCR_SIZE;
 710
 711         /* spa4 (dcr2) dimm2 */
 712         spa = nfit_buf + sizeof(*spa) * 4;
 713         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 714         spa->header.length = sizeof(*spa);
 715         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
 716         spa->range_index = 4+1;
 717         spa->address = t->dcr_dma[2];
 718         spa->length = DCR_SIZE;
 719
 720         /* spa5 (dcr3) dimm3 */
 721         spa = nfit_buf + sizeof(*spa) * 5;
 722         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 723         spa->header.length = sizeof(*spa);
 724         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
 725         spa->range_index = 5+1;
 726         spa->address = t->dcr_dma[3];
 727         spa->length = DCR_SIZE;
 728
 729         /* spa6 (bdw for dcr0) dimm0 */
 730         spa = nfit_buf + sizeof(*spa) * 6;
 731         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 732         spa->header.length = sizeof(*spa);
 733         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
 734         spa->range_index = 6+1;
 735         spa->address = t->dimm_dma[0];
 736         spa->length = DIMM_SIZE;
 737
 738         /* spa7 (bdw for dcr1) dimm1 */
 739         spa = nfit_buf + sizeof(*spa) * 7;
 740         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 741         spa->header.length = sizeof(*spa);
 742         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
 743         spa->range_index = 7+1;
 744         spa->address = t->dimm_dma[1];
 745         spa->length = DIMM_SIZE;
 746
 747         /* spa8 (bdw for dcr2) dimm2 */
 748         spa = nfit_buf + sizeof(*spa) * 8;
 749         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 750         spa->header.length = sizeof(*spa);
 751         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
 752         spa->range_index = 8+1;
 753         spa->address = t->dimm_dma[2];
 754         spa->length = DIMM_SIZE;
 755
 756         /* spa9 (bdw for dcr3) dimm3 */
 757         spa = nfit_buf + sizeof(*spa) * 9;
 758         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 759         spa->header.length = sizeof(*spa);
 760         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
 761         spa->range_index = 9+1;
 762         spa->address = t->dimm_dma[3];
 763         spa->length = DIMM_SIZE;
 764
 765         offset = sizeof(*spa) * 10;
 766         /* mem-region0 (spa0, dimm0) */
 767         memdev = nfit_buf + offset;
 768         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 769         memdev->header.length = sizeof(*memdev);
 770         memdev->device_handle = handle[0];
 771         memdev->physical_id = 0;
 772         memdev->region_id = 0;
 773         memdev->range_index = 0+1;
 774         memdev->region_index = 4+1;
 775         memdev->region_size = SPA0_SIZE/2;
 776         memdev->region_offset = t->spa_set_dma[0];
 777         memdev->address = 0;
 778         memdev->interleave_index = 0;
 779         memdev->interleave_ways = 2;
 780
 781         /* mem-region1 (spa0, dimm1) */
 782         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map);
 783         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 784         memdev->header.length = sizeof(*memdev);
 785         memdev->device_handle = handle[1];
 786         memdev->physical_id = 1;
 787         memdev->region_id = 0;
 788         memdev->range_index = 0+1;
 789         memdev->region_index = 5+1;
 790         memdev->region_size = SPA0_SIZE/2;
 791         memdev->region_offset = t->spa_set_dma[0] + SPA0_SIZE/2;
 792         memdev->address = 0;
 793         memdev->interleave_index = 0;
 794         memdev->interleave_ways = 2;
 795
 796         /* mem-region2 (spa1, dimm0) */
 797         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 2;
 798         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 799         memdev->header.length = sizeof(*memdev);
 800         memdev->device_handle = handle[0];
 801         memdev->physical_id = 0;
 802         memdev->region_id = 1;
 803         memdev->range_index = 1+1;
 804         memdev->region_index = 4+1;
 805         memdev->region_size = SPA1_SIZE/4;
 806         memdev->region_offset = t->spa_set_dma[1];
 807         memdev->address = SPA0_SIZE/2;
 808         memdev->interleave_index = 0;
 809         memdev->interleave_ways = 4;
 810
 811         /* mem-region3 (spa1, dimm1) */
 812         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 3;
 813         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 814         memdev->header.length = sizeof(*memdev);
 815         memdev->device_handle = handle[1];
 816         memdev->physical_id = 1;
 817         memdev->region_id = 1;
 818         memdev->range_index = 1+1;
 819         memdev->region_index = 5+1;
 820         memdev->region_size = SPA1_SIZE/4;
 821         memdev->region_offset = t->spa_set_dma[1] + SPA1_SIZE/4;
 822         memdev->address = SPA0_SIZE/2;
 823         memdev->interleave_index = 0;
 824         memdev->interleave_ways = 4;
 825
 826         /* mem-region4 (spa1, dimm2) */
 827         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 4;
 828         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 829         memdev->header.length = sizeof(*memdev);
 830         memdev->device_handle = handle[2];
 831         memdev->physical_id = 2;
 832         memdev->region_id = 0;
 833         memdev->range_index = 1+1;
 834         memdev->region_index = 6+1;
 835         memdev->region_size = SPA1_SIZE/4;
 836         memdev->region_offset = t->spa_set_dma[1] + 2*SPA1_SIZE/4;
 837         memdev->address = SPA0_SIZE/2;
 838         memdev->interleave_index = 0;
 839         memdev->interleave_ways = 4;
 840
 841         /* mem-region5 (spa1, dimm3) */
 842         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 5;
 843         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 844         memdev->header.length = sizeof(*memdev);
 845         memdev->device_handle = handle[3];
 846         memdev->physical_id = 3;
 847         memdev->region_id = 0;
 848         memdev->range_index = 1+1;
 849         memdev->region_index = 7+1;
 850         memdev->region_size = SPA1_SIZE/4;
 851         memdev->region_offset = t->spa_set_dma[1] + 3*SPA1_SIZE/4;
 852         memdev->address = SPA0_SIZE/2;
 853         memdev->interleave_index = 0;
 854         memdev->interleave_ways = 4;
 855
 856         /* mem-region6 (spa/dcr0, dimm0) */
 857         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 6;
 858         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 859         memdev->header.length = sizeof(*memdev);
 860         memdev->device_handle = handle[0];
 861         memdev->physical_id = 0;
 862         memdev->region_id = 0;
 863         memdev->range_index = 2+1;
 864         memdev->region_index = 0+1;
 865         memdev->region_size = 0;
 866         memdev->region_offset = 0;
 867         memdev->address = 0;
 868         memdev->interleave_index = 0;
 869         memdev->interleave_ways = 1;
 870
 871         /* mem-region7 (spa/dcr1, dimm1) */
 872         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 7;
 873         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 874         memdev->header.length = sizeof(*memdev);
 875         memdev->device_handle = handle[1];
 876         memdev->physical_id = 1;
 877         memdev->region_id = 0;
 878         memdev->range_index = 3+1;
 879         memdev->region_index = 1+1;
 880         memdev->region_size = 0;
 881         memdev->region_offset = 0;
 882         memdev->address = 0;
 883         memdev->interleave_index = 0;
 884         memdev->interleave_ways = 1;
 885
 886         /* mem-region8 (spa/dcr2, dimm2) */
 887         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 8;
 888         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 889         memdev->header.length = sizeof(*memdev);
 890         memdev->device_handle = handle[2];
 891         memdev->physical_id = 2;
 892         memdev->region_id = 0;
 893         memdev->range_index = 4+1;
 894         memdev->region_index = 2+1;
 895         memdev->region_size = 0;
 896         memdev->region_offset = 0;
 897         memdev->address = 0;
 898         memdev->interleave_index = 0;
 899         memdev->interleave_ways = 1;
 900
 901         /* mem-region9 (spa/dcr3, dimm3) */
 902         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 9;
 903         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 904         memdev->header.length = sizeof(*memdev);
 905         memdev->device_handle = handle[3];
 906         memdev->physical_id = 3;
 907         memdev->region_id = 0;
 908         memdev->range_index = 5+1;
 909         memdev->region_index = 3+1;
 910         memdev->region_size = 0;
 911         memdev->region_offset = 0;
 912         memdev->address = 0;
 913         memdev->interleave_index = 0;
 914         memdev->interleave_ways = 1;
 915
 916         /* mem-region10 (spa/bdw0, dimm0) */
 917         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 10;
 918         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 919         memdev->header.length = sizeof(*memdev);
 920         memdev->device_handle = handle[0];
 921         memdev->physical_id = 0;
 922         memdev->region_id = 0;
 923         memdev->range_index = 6+1;
 924         memdev->region_index = 0+1;
 925         memdev->region_size = 0;
 926         memdev->region_offset = 0;
 927         memdev->address = 0;
 928         memdev->interleave_index = 0;
 929         memdev->interleave_ways = 1;
 930
 931         /* mem-region11 (spa/bdw1, dimm1) */
 932         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 11;
 933         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 934         memdev->header.length = sizeof(*memdev);
 935         memdev->device_handle = handle[1];
 936         memdev->physical_id = 1;
 937         memdev->region_id = 0;
 938         memdev->range_index = 7+1;
 939         memdev->region_index = 1+1;
 940         memdev->region_size = 0;
 941         memdev->region_offset = 0;
 942         memdev->address = 0;
 943         memdev->interleave_index = 0;
 944         memdev->interleave_ways = 1;
 945
 946         /* mem-region12 (spa/bdw2, dimm2) */
 947         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 12;
 948         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 949         memdev->header.length = sizeof(*memdev);
 950         memdev->device_handle = handle[2];
 951         memdev->physical_id = 2;
 952         memdev->region_id = 0;
 953         memdev->range_index = 8+1;
 954         memdev->region_index = 2+1;
 955         memdev->region_size = 0;
 956         memdev->region_offset = 0;
 957         memdev->address = 0;
 958         memdev->interleave_index = 0;
 959         memdev->interleave_ways = 1;
 960
 961         /* mem-region13 (spa/dcr3, dimm3) */
 962         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 13;
 963         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 964         memdev->header.length = sizeof(*memdev);
 965         memdev->device_handle = handle[3];
 966         memdev->physical_id = 3;
 967         memdev->region_id = 0;
 968         memdev->range_index = 9+1;
 969         memdev->region_index = 3+1;
 970         memdev->region_size = 0;
 971         memdev->region_offset = 0;
 972         memdev->address = 0;
 973         memdev->interleave_index = 0;
 974         memdev->interleave_ways = 1;
 975
 976         offset = offset + sizeof(struct acpi_nfit_memory_map) * 14;
 977         /* dcr-descriptor0: blk */
 978         dcr = nfit_buf + offset;
 979         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
 980         dcr->header.length = sizeof(struct acpi_nfit_control_region);
 981         dcr->region_index = 0+1;
 982         dcr_common_init(dcr);
 983         dcr->serial_number = ~handle[0];
 984         dcr->code = NFIT_FIC_BLK;
 985         dcr->windows = 1;
 986         dcr->window_size = DCR_SIZE;
 987         dcr->command_offset = 0;
 988         dcr->command_size = 8;
 989         dcr->status_offset = 8;
 990         dcr->status_size = 4;
 991
 992         /* dcr-descriptor1: blk */
 993         dcr = nfit_buf + offset + sizeof(struct acpi_nfit_control_region);
 994         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
 995         dcr->header.length = sizeof(struct acpi_nfit_control_region);
 996         dcr->region_index = 1+1;
 997         dcr_common_init(dcr);
 998         dcr->serial_number = ~handle[1];
 999         dcr->code = NFIT_FIC_BLK;
1000         dcr->windows = 1;
1001         dcr->window_size = DCR_SIZE;
1002         dcr->command_offset = 0;
1003         dcr->command_size = 8;
1004         dcr->status_offset = 8;
1005         dcr->status_size = 4;
1006
1007         /* dcr-descriptor2: blk */
1008         dcr = nfit_buf + offset + sizeof(struct acpi_nfit_control_region) * 2;
1009         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1010         dcr->header.length = sizeof(struct acpi_nfit_control_region);
1011         dcr->region_index = 2+1;
1012         dcr_common_init(dcr);
1013         dcr->serial_number = ~handle[2];
1014         dcr->code = NFIT_FIC_BLK;
1015         dcr->windows = 1;
1016         dcr->window_size = DCR_SIZE;
1017         dcr->command_offset = 0;
1018         dcr->command_size = 8;
1019         dcr->status_offset = 8;
1020         dcr->status_size = 4;
1021
1022         /* dcr-descriptor3: blk */
1023         dcr = nfit_buf + offset + sizeof(struct acpi_nfit_control_region) * 3;
1024         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1025         dcr->header.length = sizeof(struct acpi_nfit_control_region);
1026         dcr->region_index = 3+1;
1027         dcr_common_init(dcr);
1028         dcr->serial_number = ~handle[3];
1029         dcr->code = NFIT_FIC_BLK;
1030         dcr->windows = 1;
1031         dcr->window_size = DCR_SIZE;
1032         dcr->command_offset = 0;
1033         dcr->command_size = 8;
1034         dcr->status_offset = 8;
1035         dcr->status_size = 4;
1036
1037         offset = offset + sizeof(struct acpi_nfit_control_region) * 4;
1038         /* dcr-descriptor0: pmem */
1039         dcr = nfit_buf + offset;
1040         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1041         dcr->header.length = offsetof(struct acpi_nfit_control_region,
1042                         window_size);
1043         dcr->region_index = 4+1;
1044         dcr_common_init(dcr);
1045         dcr->serial_number = ~handle[0];
1046         dcr->code = NFIT_FIC_BYTEN;
1047         dcr->windows = 0;
1048
1049         /* dcr-descriptor1: pmem */
1050         dcr = nfit_buf + offset + offsetof(struct acpi_nfit_control_region,
1051                         window_size);
1052         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1053         dcr->header.length = offsetof(struct acpi_nfit_control_region,
1054                         window_size);
1055         dcr->region_index = 5+1;
1056         dcr_common_init(dcr);
1057         dcr->serial_number = ~handle[1];
1058         dcr->code = NFIT_FIC_BYTEN;
1059         dcr->windows = 0;
1060
1061         /* dcr-descriptor2: pmem */
1062         dcr = nfit_buf + offset + offsetof(struct acpi_nfit_control_region,
1063                         window_size) * 2;
1064         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1065         dcr->header.length = offsetof(struct acpi_nfit_control_region,
1066                         window_size);
1067         dcr->region_index = 6+1;
1068         dcr_common_init(dcr);
1069         dcr->serial_number = ~handle[2];
1070         dcr->code = NFIT_FIC_BYTEN;
1071         dcr->windows = 0;
1072
1073         /* dcr-descriptor3: pmem */
1074         dcr = nfit_buf + offset + offsetof(struct acpi_nfit_control_region,
1075                         window_size) * 3;
1076         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1077         dcr->header.length = offsetof(struct acpi_nfit_control_region,
1078                         window_size);
1079         dcr->region_index = 7+1;
1080         dcr_common_init(dcr);
1081         dcr->serial_number = ~handle[3];
1082         dcr->code = NFIT_FIC_BYTEN;
1083         dcr->windows = 0;
1084
1085         offset = offset + offsetof(struct acpi_nfit_control_region,
1086                         window_size) * 4;
1087         /* bdw0 (spa/dcr0, dimm0) */
1088         bdw = nfit_buf + offset;
1089         bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
1090         bdw->header.length = sizeof(struct acpi_nfit_data_region);
1091         bdw->region_index = 0+1;
1092         bdw->windows = 1;
1093         bdw->offset = 0;
1094         bdw->size = BDW_SIZE;
1095         bdw->capacity = DIMM_SIZE;
1096         bdw->start_address = 0;
1097
1098         /* bdw1 (spa/dcr1, dimm1) */
1099         bdw = nfit_buf + offset + sizeof(struct acpi_nfit_data_region);
1100         bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
1101         bdw->header.length = sizeof(struct acpi_nfit_data_region);
1102         bdw->region_index = 1+1;
1103         bdw->windows = 1;
1104         bdw->offset = 0;
1105         bdw->size = BDW_SIZE;
1106         bdw->capacity = DIMM_SIZE;
1107         bdw->start_address = 0;
1108
1109         /* bdw2 (spa/dcr2, dimm2) */
1110         bdw = nfit_buf + offset + sizeof(struct acpi_nfit_data_region) * 2;
1111         bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
1112         bdw->header.length = sizeof(struct acpi_nfit_data_region);
1113         bdw->region_index = 2+1;
1114         bdw->windows = 1;
1115         bdw->offset = 0;
1116         bdw->size = BDW_SIZE;
1117         bdw->capacity = DIMM_SIZE;
1118         bdw->start_address = 0;
1119
1120         /* bdw3 (spa/dcr3, dimm3) */
1121         bdw = nfit_buf + offset + sizeof(struct acpi_nfit_data_region) * 3;
1122         bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
1123         bdw->header.length = sizeof(struct acpi_nfit_data_region);
1124         bdw->region_index = 3+1;
1125         bdw->windows = 1;
1126         bdw->offset = 0;
1127         bdw->size = BDW_SIZE;
1128         bdw->capacity = DIMM_SIZE;
1129         bdw->start_address = 0;
1130
1131         offset = offset + sizeof(struct acpi_nfit_data_region) * 4;
1132         /* flush0 (dimm0) */
1133         flush = nfit_buf + offset;
1134         flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
1135         flush->header.length = flush_hint_size;
1136         flush->device_handle = handle[0];
1137         flush->hint_count = NUM_HINTS;
1138         for (i = 0; i < NUM_HINTS; i++)
1139                 flush->hint_address[i] = t->flush_dma[0] + i * sizeof(u64);
1140
1141         /* flush1 (dimm1) */
1142         flush = nfit_buf + offset + flush_hint_size * 1;
1143         flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
1144         flush->header.length = flush_hint_size;
1145         flush->device_handle = handle[1];
1146         flush->hint_count = NUM_HINTS;
1147         for (i = 0; i < NUM_HINTS; i++)
1148                 flush->hint_address[i] = t->flush_dma[1] + i * sizeof(u64);
1149
1150         /* flush2 (dimm2) */
1151         flush = nfit_buf + offset + flush_hint_size  * 2;
1152         flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
1153         flush->header.length = flush_hint_size;
1154         flush->device_handle = handle[2];
1155         flush->hint_count = NUM_HINTS;
1156         for (i = 0; i < NUM_HINTS; i++)
1157                 flush->hint_address[i] = t->flush_dma[2] + i * sizeof(u64);
1158
1159         /* flush3 (dimm3) */
1160         flush = nfit_buf + offset + flush_hint_size * 3;
1161         flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
1162         flush->header.length = flush_hint_size;
1163         flush->device_handle = handle[3];
1164         flush->hint_count = NUM_HINTS;
1165         for (i = 0; i < NUM_HINTS; i++)
1166                 flush->hint_address[i] = t->flush_dma[3] + i * sizeof(u64);
1167
1168         if (t->setup_hotplug) {
1169                 offset = offset + flush_hint_size * 4;
1170                 /* dcr-descriptor4: blk */
1171                 dcr = nfit_buf + offset;
1172                 dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1173                 dcr->header.length = sizeof(struct acpi_nfit_control_region);
1174                 dcr->region_index = 8+1;
1175                 dcr_common_init(dcr);
1176                 dcr->serial_number = ~handle[4];
1177                 dcr->code = NFIT_FIC_BLK;
1178                 dcr->windows = 1;
1179                 dcr->window_size = DCR_SIZE;
1180                 dcr->command_offset = 0;
1181                 dcr->command_size = 8;
1182                 dcr->status_offset = 8;
1183                 dcr->status_size = 4;
1184
1185                 offset = offset + sizeof(struct acpi_nfit_control_region);
1186                 /* dcr-descriptor4: pmem */
1187                 dcr = nfit_buf + offset;
1188                 dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1189                 dcr->header.length = offsetof(struct acpi_nfit_control_region,
1190                                 window_size);
1191                 dcr->region_index = 9+1;
1192                 dcr_common_init(dcr);
1193                 dcr->serial_number = ~handle[4];
1194                 dcr->code = NFIT_FIC_BYTEN;
1195                 dcr->windows = 0;
1196
1197                 offset = offset + offsetof(struct acpi_nfit_control_region,
1198                                 window_size);
1199                 /* bdw4 (spa/dcr4, dimm4) */
1200                 bdw = nfit_buf + offset;
1201                 bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
1202                 bdw->header.length = sizeof(struct acpi_nfit_data_region);
1203                 bdw->region_index = 8+1;
1204                 bdw->windows = 1;
1205                 bdw->offset = 0;
1206                 bdw->size = BDW_SIZE;
1207                 bdw->capacity = DIMM_SIZE;
1208                 bdw->start_address = 0;
1209
1210                 offset = offset + sizeof(struct acpi_nfit_data_region);
1211                 /* spa10 (dcr4) dimm4 */
1212                 spa = nfit_buf + offset;
1213                 spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1214                 spa->header.length = sizeof(*spa);
1215                 memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
1216                 spa->range_index = 10+1;
1217                 spa->address = t->dcr_dma[4];
1218                 spa->length = DCR_SIZE;
1219
1220                 /*
1221                  * spa11 (single-dimm interleave for hotplug, note storage
1222                  * does not actually alias the related block-data-window
1223                  * regions)
1224                  */
1225                 spa = nfit_buf + offset + sizeof(*spa);
1226                 spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1227                 spa->header.length = sizeof(*spa);
1228                 memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16);
1229                 spa->range_index = 11+1;
1230                 spa->address = t->spa_set_dma[2];
1231                 spa->length = SPA0_SIZE;
1232
1233                 /* spa12 (bdw for dcr4) dimm4 */
1234                 spa = nfit_buf + offset + sizeof(*spa) * 2;
1235                 spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1236                 spa->header.length = sizeof(*spa);
1237                 memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
1238                 spa->range_index = 12+1;
1239                 spa->address = t->dimm_dma[4];
1240                 spa->length = DIMM_SIZE;
1241
1242                 offset = offset + sizeof(*spa) * 3;
1243                 /* mem-region14 (spa/dcr4, dimm4) */
1244                 memdev = nfit_buf + offset;
1245                 memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1246                 memdev->header.length = sizeof(*memdev);
1247                 memdev->device_handle = handle[4];
1248                 memdev->physical_id = 4;
1249                 memdev->region_id = 0;
1250                 memdev->range_index = 10+1;
1251                 memdev->region_index = 8+1;
1252                 memdev->region_size = 0;
1253                 memdev->region_offset = 0;
1254                 memdev->address = 0;
1255                 memdev->interleave_index = 0;
1256                 memdev->interleave_ways = 1;
1257
1258                 /* mem-region15 (spa0, dimm4) */
1259                 memdev = nfit_buf + offset +
1260                                 sizeof(struct acpi_nfit_memory_map);
1261                 memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1262                 memdev->header.length = sizeof(*memdev);
1263                 memdev->device_handle = handle[4];
1264                 memdev->physical_id = 4;
1265                 memdev->region_id = 0;
1266                 memdev->range_index = 11+1;
1267                 memdev->region_index = 9+1;
1268                 memdev->region_size = SPA0_SIZE;
1269                 memdev->region_offset = t->spa_set_dma[2];
1270                 memdev->address = 0;
1271                 memdev->interleave_index = 0;
1272                 memdev->interleave_ways = 1;
1273
1274                 /* mem-region16 (spa/bdw4, dimm4) */
1275                 memdev = nfit_buf + offset +
1276                                 sizeof(struct acpi_nfit_memory_map) * 2;
1277                 memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1278                 memdev->header.length = sizeof(*memdev);
1279                 memdev->device_handle = handle[4];
1280                 memdev->physical_id = 4;
1281                 memdev->region_id = 0;
1282                 memdev->range_index = 12+1;
1283                 memdev->region_index = 8+1;
1284                 memdev->region_size = 0;
1285                 memdev->region_offset = 0;
1286                 memdev->address = 0;
1287                 memdev->interleave_index = 0;
1288                 memdev->interleave_ways = 1;
1289
1290                 offset = offset + sizeof(struct acpi_nfit_memory_map) * 3;
1291                 /* flush3 (dimm4) */
1292                 flush = nfit_buf + offset;
1293                 flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
1294                 flush->header.length = flush_hint_size;
1295                 flush->device_handle = handle[4];
1296                 flush->hint_count = NUM_HINTS;
1297                 for (i = 0; i < NUM_HINTS; i++)
1298                         flush->hint_address[i] = t->flush_dma[4]
1299                                 + i * sizeof(u64);
1300         }
1301
1302         post_ars_status(&t->ars_state, t->spa_set_dma[0], SPA0_SIZE);
1303
1304         acpi_desc = &t->acpi_desc;
1305         set_bit(ND_CMD_GET_CONFIG_SIZE, &acpi_desc->dimm_cmd_force_en);
1306         set_bit(ND_CMD_GET_CONFIG_DATA, &acpi_desc->dimm_cmd_force_en);
1307         set_bit(ND_CMD_SET_CONFIG_DATA, &acpi_desc->dimm_cmd_force_en);
1308         set_bit(ND_CMD_SMART, &acpi_desc->dimm_cmd_force_en);
1309         set_bit(ND_CMD_ARS_CAP, &acpi_desc->bus_cmd_force_en);
1310         set_bit(ND_CMD_ARS_START, &acpi_desc->bus_cmd_force_en);
1311         set_bit(ND_CMD_ARS_STATUS, &acpi_desc->bus_cmd_force_en);
1312         set_bit(ND_CMD_CLEAR_ERROR, &acpi_desc->bus_cmd_force_en);
1313         set_bit(ND_CMD_SMART_THRESHOLD, &acpi_desc->dimm_cmd_force_en);
1314 }
1315
1316 static void nfit_test1_setup(struct nfit_test *t)
1317 {
1318         size_t offset;
1319         void *nfit_buf = t->nfit_buf;
1320         struct acpi_nfit_memory_map *memdev;
1321         struct acpi_nfit_control_region *dcr;
1322         struct acpi_nfit_system_address *spa;
1323         struct acpi_nfit_desc *acpi_desc;
1324
1325         offset = 0;
1326         /* spa0 (flat range with no bdw aliasing) */
1327         spa = nfit_buf + offset;
1328         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1329         spa->header.length = sizeof(*spa);
1330         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16);
1331         spa->range_index = 0+1;
1332         spa->address = t->spa_set_dma[0];
1333         spa->length = SPA2_SIZE;
1334
1335         /* virtual cd region */
1336         spa = nfit_buf + sizeof(*spa);
1337         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1338         spa->header.length = sizeof(*spa);
1339         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_VCD), 16);
1340         spa->range_index = 0;
1341         spa->address = t->spa_set_dma[1];
1342         spa->length = SPA_VCD_SIZE;
1343
1344         offset += sizeof(*spa) * 2;
1345         /* mem-region0 (spa0, dimm0) */
1346         memdev = nfit_buf + offset;
1347         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1348         memdev->header.length = sizeof(*memdev);
1349         memdev->device_handle = 0;
1350         memdev->physical_id = 0;
1351         memdev->region_id = 0;
1352         memdev->range_index = 0+1;
1353         memdev->region_index = 0+1;
1354         memdev->region_size = SPA2_SIZE;
1355         memdev->region_offset = 0;
1356         memdev->address = 0;
1357         memdev->interleave_index = 0;
1358         memdev->interleave_ways = 1;
1359         memdev->flags = ACPI_NFIT_MEM_SAVE_FAILED | ACPI_NFIT_MEM_RESTORE_FAILED
1360                 | ACPI_NFIT_MEM_FLUSH_FAILED | ACPI_NFIT_MEM_HEALTH_OBSERVED
1361                 | ACPI_NFIT_MEM_NOT_ARMED;
1362
1363         offset += sizeof(*memdev);
1364         /* dcr-descriptor0 */
1365         dcr = nfit_buf + offset;
1366         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1367         dcr->header.length = offsetof(struct acpi_nfit_control_region,
1368                         window_size);
1369         dcr->region_index = 0+1;
1370         dcr_common_init(dcr);
1371         dcr->serial_number = ~0;
1372         dcr->code = NFIT_FIC_BYTE;
1373         dcr->windows = 0;
1374
1375         post_ars_status(&t->ars_state, t->spa_set_dma[0], SPA2_SIZE);
1376
1377         acpi_desc = &t->acpi_desc;
1378         set_bit(ND_CMD_ARS_CAP, &acpi_desc->bus_cmd_force_en);
1379         set_bit(ND_CMD_ARS_START, &acpi_desc->bus_cmd_force_en);
1380         set_bit(ND_CMD_ARS_STATUS, &acpi_desc->bus_cmd_force_en);
1381         set_bit(ND_CMD_CLEAR_ERROR, &acpi_desc->bus_cmd_force_en);
1382 }
1383
1384 static int nfit_test_blk_do_io(struct nd_blk_region *ndbr, resource_size_t dpa,
1385                 void *iobuf, u64 len, int rw)
1386 {
1387         struct nfit_blk *nfit_blk = ndbr->blk_provider_data;
1388         struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
1389         struct nd_region *nd_region = &ndbr->nd_region;
1390         unsigned int lane;
1391
1392         lane = nd_region_acquire_lane(nd_region);
1393         if (rw)
1394                 memcpy(mmio->addr.base + dpa, iobuf, len);
1395         else {
1396                 memcpy(iobuf, mmio->addr.base + dpa, len);
1397
1398                 /* give us some some coverage of the mmio_flush_range() API */
1399                 mmio_flush_range(mmio->addr.base + dpa, len);
1400         }
1401         nd_region_release_lane(nd_region, lane);
1402
1403         return 0;
1404 }
1405
1406 static int nfit_test_probe(struct platform_device *pdev)
1407 {
1408         struct nvdimm_bus_descriptor *nd_desc;
1409         struct acpi_nfit_desc *acpi_desc;
1410         struct device *dev = &pdev->dev;
1411         struct nfit_test *nfit_test;
1412         int rc;
1413
1414         nfit_test = to_nfit_test(&pdev->dev);
1415
1416         /* common alloc */
1417         if (nfit_test->num_dcr) {
1418                 int num = nfit_test->num_dcr;
1419
1420                 nfit_test->dimm = devm_kcalloc(dev, num, sizeof(void *),
1421                                 GFP_KERNEL);
1422                 nfit_test->dimm_dma = devm_kcalloc(dev, num, sizeof(dma_addr_t),
1423                                 GFP_KERNEL);
1424                 nfit_test->flush = devm_kcalloc(dev, num, sizeof(void *),
1425                                 GFP_KERNEL);
1426                 nfit_test->flush_dma = devm_kcalloc(dev, num, sizeof(dma_addr_t),
1427                                 GFP_KERNEL);
1428                 nfit_test->label = devm_kcalloc(dev, num, sizeof(void *),
1429                                 GFP_KERNEL);
1430                 nfit_test->label_dma = devm_kcalloc(dev, num,
1431                                 sizeof(dma_addr_t), GFP_KERNEL);
1432                 nfit_test->dcr = devm_kcalloc(dev, num,
1433                                 sizeof(struct nfit_test_dcr *), GFP_KERNEL);
1434                 nfit_test->dcr_dma = devm_kcalloc(dev, num,
1435                                 sizeof(dma_addr_t), GFP_KERNEL);
1436                 if (nfit_test->dimm && nfit_test->dimm_dma && nfit_test->label
1437                                 && nfit_test->label_dma && nfit_test->dcr
1438                                 && nfit_test->dcr_dma && nfit_test->flush
1439                                 && nfit_test->flush_dma)
1440                         /* pass */;
1441                 else
1442                         return -ENOMEM;
1443         }
1444
1445         if (nfit_test->num_pm) {
1446                 int num = nfit_test->num_pm;
1447
1448                 nfit_test->spa_set = devm_kcalloc(dev, num, sizeof(void *),
1449                                 GFP_KERNEL);
1450                 nfit_test->spa_set_dma = devm_kcalloc(dev, num,
1451                                 sizeof(dma_addr_t), GFP_KERNEL);
1452                 if (nfit_test->spa_set && nfit_test->spa_set_dma)
1453                         /* pass */;
1454                 else
1455                         return -ENOMEM;
1456         }
1457
1458         /* per-nfit specific alloc */
1459         if (nfit_test->alloc(nfit_test))
1460                 return -ENOMEM;
1461
1462         nfit_test->setup(nfit_test);
1463         acpi_desc = &nfit_test->acpi_desc;
1464         acpi_nfit_desc_init(acpi_desc, &pdev->dev);
1465         acpi_desc->blk_do_io = nfit_test_blk_do_io;
1466         nd_desc = &acpi_desc->nd_desc;
1467         nd_desc->provider_name = NULL;
1468         nd_desc->module = THIS_MODULE;
1469         nd_desc->ndctl = nfit_test_ctl;
1470
1471         rc = acpi_nfit_init(acpi_desc, nfit_test->nfit_buf,
1472                         nfit_test->nfit_size);
1473         if (rc)
1474                 return rc;
1475
1476         if (nfit_test->setup != nfit_test0_setup)
1477                 return 0;
1478
1479         flush_work(&acpi_desc->work);
1480         nfit_test->setup_hotplug = 1;
1481         nfit_test->setup(nfit_test);
1482
1483         rc = acpi_nfit_init(acpi_desc, nfit_test->nfit_buf,
1484                         nfit_test->nfit_size);
1485         if (rc)
1486                 return rc;
1487
1488         return 0;
1489 }
1490
1491 static int nfit_test_remove(struct platform_device *pdev)
1492 {
1493         return 0;
1494 }
1495
1496 static void nfit_test_release(struct device *dev)
1497 {
1498         struct nfit_test *nfit_test = to_nfit_test(dev);
1499
1500         kfree(nfit_test);
1501 }
1502
1503 static const struct platform_device_id nfit_test_id[] = {
1504         { KBUILD_MODNAME },
1505         { },
1506 };
1507
1508 static struct platform_driver nfit_test_driver = {
1509         .probe = nfit_test_probe,
1510         .remove = nfit_test_remove,
1511         .driver = {
1512                 .name = KBUILD_MODNAME,
1513         },
1514         .id_table = nfit_test_id,
1515 };
1516
1517 static __init int nfit_test_init(void)
1518 {
1519         int rc, i;
1520
1521         nfit_test_setup(nfit_test_lookup);
1522
1523         for (i = 0; i < NUM_NFITS; i++) {
1524                 struct nfit_test *nfit_test;
1525                 struct platform_device *pdev;
1526
1527                 nfit_test = kzalloc(sizeof(*nfit_test), GFP_KERNEL);
1528                 if (!nfit_test) {
1529                         rc = -ENOMEM;
1530                         goto err_register;
1531                 }
1532                 INIT_LIST_HEAD(&nfit_test->resources);
1533                 switch (i) {
1534                 case 0:
1535                         nfit_test->num_pm = NUM_PM;
1536                         nfit_test->num_dcr = NUM_DCR;
1537                         nfit_test->alloc = nfit_test0_alloc;
1538                         nfit_test->setup = nfit_test0_setup;
1539                         break;
1540                 case 1:
1541                         nfit_test->num_pm = 1;
1542                         nfit_test->alloc = nfit_test1_alloc;
1543                         nfit_test->setup = nfit_test1_setup;
1544                         break;
1545                 default:
1546                         rc = -EINVAL;
1547                         goto err_register;
1548                 }
1549                 pdev = &nfit_test->pdev;
1550                 pdev->name = KBUILD_MODNAME;
1551                 pdev->id = i;
1552                 pdev->dev.release = nfit_test_release;
1553                 rc = platform_device_register(pdev);
1554                 if (rc) {
1555                         put_device(&pdev->dev);
1556                         goto err_register;
1557                 }
1558
1559                 rc = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
1560                 if (rc)
1561                         goto err_register;
1562
1563                 instances[i] = nfit_test;
1564         }
1565
1566         rc = platform_driver_register(&nfit_test_driver);
1567         if (rc)
1568                 goto err_register;
1569         return 0;
1570
1571  err_register:
1572         for (i = 0; i < NUM_NFITS; i++)
1573                 if (instances[i])
1574                         platform_device_unregister(&instances[i]->pdev);
1575         nfit_test_teardown();
1576         return rc;
1577 }
1578
1579 static __exit void nfit_test_exit(void)
1580 {
1581         int i;
1582
1583         platform_driver_unregister(&nfit_test_driver);
1584         for (i = 0; i < NUM_NFITS; i++)
1585                 platform_device_unregister(&instances[i]->pdev);
1586         nfit_test_teardown();
1587 }
1588
1589 module_init(nfit_test_init);
1590 module_exit(nfit_test_exit);
1591 MODULE_LICENSE("GPL v2");
1592 MODULE_AUTHOR("Intel Corporation");