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 <nd-core.h>
  27 #include <nfit.h>
  28 #include <nd.h>
  29 #include "nfit_test.h"
  30
  31 /*
  32  * Generate an NFIT table to describe the following topology:
  33  *
  34  * BUS0: Interleaved PMEM regions, and aliasing with BLK regions
  35  *
  36  *                     (a)                       (b)            DIMM   BLK-REGION
  37  *           +----------+--------------+----------+---------+
  38  * +------+  |  blk2.0  |     pm0.0    |  blk2.1  |  pm1.0  |    0      region2
  39  * | imc0 +--+- - - - - region0 - - - -+----------+         +
  40  * +--+---+  |  blk3.0  |     pm0.0    |  blk3.1  |  pm1.0  |    1      region3
  41  *    |      +----------+--------------v----------v         v
  42  * +--+---+                            |                    |
  43  * | cpu0 |                                    region1
  44  * +--+---+                            |                    |
  45  *    |      +-------------------------^----------^         ^
  46  * +--+---+  |                 blk4.0             |  pm1.0  |    2      region4
  47  * | imc1 +--+-------------------------+----------+         +
  48  * +------+  |                 blk5.0             |  pm1.0  |    3      region5
  49  *           +-------------------------+----------+-+-------+
  50  *
  51  * +--+---+
  52  * | cpu1 |
  53  * +--+---+                   (Hotplug DIMM)
  54  *    |      +----------------------------------------------+
  55  * +--+---+  |                 blk6.0/pm7.0                 |    4      region6/7
  56  * | imc0 +--+----------------------------------------------+
  57  * +------+
  58  *
  59  *
  60  * *) In this layout we have four dimms and two memory controllers in one
  61  *    socket.  Each unique interface (BLK or PMEM) to DPA space
  62  *    is identified by a region device with a dynamically assigned id.
  63  *
  64  * *) The first portion of dimm0 and dimm1 are interleaved as REGION0.
  65  *    A single PMEM namespace "pm0.0" is created using half of the
  66  *    REGION0 SPA-range.  REGION0 spans dimm0 and dimm1.  PMEM namespace
  67  *    allocate from from the bottom of a region.  The unallocated
  68  *    portion of REGION0 aliases with REGION2 and REGION3.  That
  69  *    unallacted capacity is reclaimed as BLK namespaces ("blk2.0" and
  70  *    "blk3.0") starting at the base of each DIMM to offset (a) in those
  71  *    DIMMs.  "pm0.0", "blk2.0" and "blk3.0" are free-form readable
  72  *    names that can be assigned to a namespace.
  73  *
  74  * *) In the last portion of dimm0 and dimm1 we have an interleaved
  75  *    SPA range, REGION1, that spans those two dimms as well as dimm2
  76  *    and dimm3.  Some of REGION1 allocated to a PMEM namespace named
  77  *    "pm1.0" the rest is reclaimed in 4 BLK namespaces (for each
  78  *    dimm in the interleave set), "blk2.1", "blk3.1", "blk4.0", and
  79  *    "blk5.0".
  80  *
  81  * *) The portion of dimm2 and dimm3 that do not participate in the
  82  *    REGION1 interleaved SPA range (i.e. the DPA address below offset
  83  *    (b) are also included in the "blk4.0" and "blk5.0" namespaces.
  84  *    Note, that BLK namespaces need not be contiguous in DPA-space, and
  85  *    can consume aliased capacity from multiple interleave sets.
  86  *
  87  * BUS1: Legacy NVDIMM (single contiguous range)
  88  *
  89  *  region2
  90  * +---------------------+
  91  * |---------------------|
  92  * ||       pm2.0       ||
  93  * |---------------------|
  94  * +---------------------+
  95  *
  96  * *) A NFIT-table may describe a simple system-physical-address range
  97  *    with no BLK aliasing.  This type of region may optionally
  98  *    reference an NVDIMM.
  99  */
 100 enum {
 101         NUM_PM  = 3,
 102         NUM_DCR = 5,
 103         NUM_HINTS = 8,
 104         NUM_BDW = NUM_DCR,
 105         NUM_SPA = NUM_PM + NUM_DCR + NUM_BDW,
 106         NUM_MEM = NUM_DCR + NUM_BDW + 2 /* spa0 iset */ + 4 /* spa1 iset */,
 107         DIMM_SIZE = SZ_32M,
 108         LABEL_SIZE = SZ_128K,
 109         SPA_VCD_SIZE = SZ_4M,
 110         SPA0_SIZE = DIMM_SIZE,
 111         SPA1_SIZE = DIMM_SIZE*2,
 112         SPA2_SIZE = DIMM_SIZE,
 113         BDW_SIZE = 64 << 8,
 114         DCR_SIZE = 12,
 115         NUM_NFITS = 2, /* permit testing multiple NFITs per system */
 116 };
 117
 118 struct nfit_test_dcr {
 119         __le64 bdw_addr;
 120         __le32 bdw_status;
 121         __u8 aperature[BDW_SIZE];
 122 };
 123
 124 #define NFIT_DIMM_HANDLE(node, socket, imc, chan, dimm) \
 125         (((node & 0xfff) << 16) | ((socket & 0xf) << 12) \
 126          | ((imc & 0xf) << 8) | ((chan & 0xf) << 4) | (dimm & 0xf))
 127
 128 static u32 handle[] = {
 129         [0] = NFIT_DIMM_HANDLE(0, 0, 0, 0, 0),
 130         [1] = NFIT_DIMM_HANDLE(0, 0, 0, 0, 1),
 131         [2] = NFIT_DIMM_HANDLE(0, 0, 1, 0, 0),
 132         [3] = NFIT_DIMM_HANDLE(0, 0, 1, 0, 1),
 133         [4] = NFIT_DIMM_HANDLE(0, 1, 0, 0, 0),
 134         [5] = NFIT_DIMM_HANDLE(1, 0, 0, 0, 0),
 135 };
 136
 137 static unsigned long dimm_fail_cmd_flags[NUM_DCR];
 138
 139 struct nfit_test {
 140         struct acpi_nfit_desc acpi_desc;
 141         struct platform_device pdev;
 142         struct list_head resources;
 143         void *nfit_buf;
 144         dma_addr_t nfit_dma;
 145         size_t nfit_size;
 146         int dcr_idx;
 147         int num_dcr;
 148         int num_pm;
 149         void **dimm;
 150         dma_addr_t *dimm_dma;
 151         void **flush;
 152         dma_addr_t *flush_dma;
 153         void **label;
 154         dma_addr_t *label_dma;
 155         void **spa_set;
 156         dma_addr_t *spa_set_dma;
 157         struct nfit_test_dcr **dcr;
 158         dma_addr_t *dcr_dma;
 159         int (*alloc)(struct nfit_test *t);
 160         void (*setup)(struct nfit_test *t);
 161         int setup_hotplug;
 162         union acpi_object **_fit;
 163         dma_addr_t _fit_dma;
 164         struct ars_state {
 165                 struct nd_cmd_ars_status *ars_status;
 166                 unsigned long deadline;
 167                 spinlock_t lock;
 168         } ars_state;
 169         struct device *dimm_dev[NUM_DCR];
 170 };
 171
 172 static struct nfit_test *to_nfit_test(struct device *dev)
 173 {
 174         struct platform_device *pdev = to_platform_device(dev);
 175
 176         return container_of(pdev, struct nfit_test, pdev);
 177 }
 178
 179 static int nfit_test_cmd_get_config_size(struct nd_cmd_get_config_size *nd_cmd,
 180                 unsigned int buf_len)
 181 {
 182         if (buf_len < sizeof(*nd_cmd))
 183                 return -EINVAL;
 184
 185         nd_cmd->status = 0;
 186         nd_cmd->config_size = LABEL_SIZE;
 187         nd_cmd->max_xfer = SZ_4K;
 188
 189         return 0;
 190 }
 191
 192 static int nfit_test_cmd_get_config_data(struct nd_cmd_get_config_data_hdr
 193                 *nd_cmd, unsigned int buf_len, void *label)
 194 {
 195         unsigned int len, offset = nd_cmd->in_offset;
 196         int rc;
 197
 198         if (buf_len < sizeof(*nd_cmd))
 199                 return -EINVAL;
 200         if (offset >= LABEL_SIZE)
 201                 return -EINVAL;
 202         if (nd_cmd->in_length + sizeof(*nd_cmd) > buf_len)
 203                 return -EINVAL;
 204
 205         nd_cmd->status = 0;
 206         len = min(nd_cmd->in_length, LABEL_SIZE - offset);
 207         memcpy(nd_cmd->out_buf, label + offset, len);
 208         rc = buf_len - sizeof(*nd_cmd) - len;
 209
 210         return rc;
 211 }
 212
 213 static int nfit_test_cmd_set_config_data(struct nd_cmd_set_config_hdr *nd_cmd,
 214                 unsigned int buf_len, void *label)
 215 {
 216         unsigned int len, offset = nd_cmd->in_offset;
 217         u32 *status;
 218         int rc;
 219
 220         if (buf_len < sizeof(*nd_cmd))
 221                 return -EINVAL;
 222         if (offset >= LABEL_SIZE)
 223                 return -EINVAL;
 224         if (nd_cmd->in_length + sizeof(*nd_cmd) + 4 > buf_len)
 225                 return -EINVAL;
 226
 227         status = (void *)nd_cmd + nd_cmd->in_length + sizeof(*nd_cmd);
 228         *status = 0;
 229         len = min(nd_cmd->in_length, LABEL_SIZE - offset);
 230         memcpy(label + offset, nd_cmd->in_buf, len);
 231         rc = buf_len - sizeof(*nd_cmd) - (len + 4);
 232
 233         return rc;
 234 }
 235
 236 #define NFIT_TEST_ARS_RECORDS 4
 237 #define NFIT_TEST_CLEAR_ERR_UNIT 256
 238
 239 static int nfit_test_cmd_ars_cap(struct nd_cmd_ars_cap *nd_cmd,
 240                 unsigned int buf_len)
 241 {
 242         if (buf_len < sizeof(*nd_cmd))
 243                 return -EINVAL;
 244
 245         nd_cmd->max_ars_out = sizeof(struct nd_cmd_ars_status)
 246                 + NFIT_TEST_ARS_RECORDS * sizeof(struct nd_ars_record);
 247         nd_cmd->status = (ND_ARS_PERSISTENT | ND_ARS_VOLATILE) << 16;
 248         nd_cmd->clear_err_unit = NFIT_TEST_CLEAR_ERR_UNIT;
 249
 250         return 0;
 251 }
 252
 253 /*
 254  * Initialize the ars_state to return an ars_result 1 second in the future with
 255  * a 4K error range in the middle of the requested address range.
 256  */
 257 static void post_ars_status(struct ars_state *ars_state, u64 addr, u64 len)
 258 {
 259         struct nd_cmd_ars_status *ars_status;
 260         struct nd_ars_record *ars_record;
 261
 262         ars_state->deadline = jiffies + 1*HZ;
 263         ars_status = ars_state->ars_status;
 264         ars_status->status = 0;
 265         ars_status->out_length = sizeof(struct nd_cmd_ars_status)
 266                 + sizeof(struct nd_ars_record);
 267         ars_status->address = addr;
 268         ars_status->length = len;
 269         ars_status->type = ND_ARS_PERSISTENT;
 270         ars_status->num_records = 1;
 271         ars_record = &ars_status->records[0];
 272         ars_record->handle = 0;
 273         ars_record->err_address = addr + len / 2;
 274         ars_record->length = SZ_4K;
 275 }
 276
 277 static int nfit_test_cmd_ars_start(struct ars_state *ars_state,
 278                 struct nd_cmd_ars_start *ars_start, unsigned int buf_len,
 279                 int *cmd_rc)
 280 {
 281         if (buf_len < sizeof(*ars_start))
 282                 return -EINVAL;
 283
 284         spin_lock(&ars_state->lock);
 285         if (time_before(jiffies, ars_state->deadline)) {
 286                 ars_start->status = NFIT_ARS_START_BUSY;
 287                 *cmd_rc = -EBUSY;
 288         } else {
 289                 ars_start->status = 0;
 290                 ars_start->scrub_time = 1;
 291                 post_ars_status(ars_state, ars_start->address,
 292                                 ars_start->length);
 293                 *cmd_rc = 0;
 294         }
 295         spin_unlock(&ars_state->lock);
 296
 297         return 0;
 298 }
 299
 300 static int nfit_test_cmd_ars_status(struct ars_state *ars_state,
 301                 struct nd_cmd_ars_status *ars_status, unsigned int buf_len,
 302                 int *cmd_rc)
 303 {
 304         if (buf_len < ars_state->ars_status->out_length)
 305                 return -EINVAL;
 306
 307         spin_lock(&ars_state->lock);
 308         if (time_before(jiffies, ars_state->deadline)) {
 309                 memset(ars_status, 0, buf_len);
 310                 ars_status->status = NFIT_ARS_STATUS_BUSY;
 311                 ars_status->out_length = sizeof(*ars_status);
 312                 *cmd_rc = -EBUSY;
 313         } else {
 314                 memcpy(ars_status, ars_state->ars_status,
 315                                 ars_state->ars_status->out_length);
 316                 *cmd_rc = 0;
 317         }
 318         spin_unlock(&ars_state->lock);
 319         return 0;
 320 }
 321
 322 static int nfit_test_cmd_clear_error(struct nd_cmd_clear_error *clear_err,
 323                 unsigned int buf_len, int *cmd_rc)
 324 {
 325         const u64 mask = NFIT_TEST_CLEAR_ERR_UNIT - 1;
 326         if (buf_len < sizeof(*clear_err))
 327                 return -EINVAL;
 328
 329         if ((clear_err->address & mask) || (clear_err->length & mask))
 330                 return -EINVAL;
 331
 332         /*
 333          * Report 'all clear' success for all commands even though a new
 334          * scrub will find errors again.  This is enough to have the
 335          * error removed from the 'badblocks' tracking in the pmem
 336          * driver.
 337          */
 338         clear_err->status = 0;
 339         clear_err->cleared = clear_err->length;
 340         *cmd_rc = 0;
 341         return 0;
 342 }
 343
 344 static int nfit_test_cmd_smart(struct nd_cmd_smart *smart, unsigned int buf_len)
 345 {
 346         static const struct nd_smart_payload smart_data = {
 347                 .flags = ND_SMART_HEALTH_VALID | ND_SMART_TEMP_VALID
 348                         | ND_SMART_SPARES_VALID | ND_SMART_ALARM_VALID
 349                         | ND_SMART_USED_VALID | ND_SMART_SHUTDOWN_VALID,
 350                 .health = ND_SMART_NON_CRITICAL_HEALTH,
 351                 .temperature = 23 * 16,
 352                 .spares = 75,
 353                 .alarm_flags = ND_SMART_SPARE_TRIP | ND_SMART_TEMP_TRIP,
 354                 .life_used = 5,
 355                 .shutdown_state = 0,
 356                 .vendor_size = 0,
 357         };
 358
 359         if (buf_len < sizeof(*smart))
 360                 return -EINVAL;
 361         memcpy(smart->data, &smart_data, sizeof(smart_data));
 362         return 0;
 363 }
 364
 365 static int nfit_test_cmd_smart_threshold(struct nd_cmd_smart_threshold *smart_t,
 366                 unsigned int buf_len)
 367 {
 368         static const struct nd_smart_threshold_payload smart_t_data = {
 369                 .alarm_control = ND_SMART_SPARE_TRIP | ND_SMART_TEMP_TRIP,
 370                 .temperature = 40 * 16,
 371                 .spares = 5,
 372         };
 373
 374         if (buf_len < sizeof(*smart_t))
 375                 return -EINVAL;
 376         memcpy(smart_t->data, &smart_t_data, sizeof(smart_t_data));
 377         return 0;
 378 }
 379
 380 static int nfit_test_ctl(struct nvdimm_bus_descriptor *nd_desc,
 381                 struct nvdimm *nvdimm, unsigned int cmd, void *buf,
 382                 unsigned int buf_len, int *cmd_rc)
 383 {
 384         struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
 385         struct nfit_test *t = container_of(acpi_desc, typeof(*t), acpi_desc);
 386         unsigned int func = cmd;
 387         int i, rc = 0, __cmd_rc;
 388
 389         if (!cmd_rc)
 390                 cmd_rc = &__cmd_rc;
 391         *cmd_rc = 0;
 392
 393         if (nvdimm) {
 394                 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
 395                 unsigned long cmd_mask = nvdimm_cmd_mask(nvdimm);
 396
 397                 if (!nfit_mem)
 398                         return -ENOTTY;
 399
 400                 if (cmd == ND_CMD_CALL) {
 401                         struct nd_cmd_pkg *call_pkg = buf;
 402
 403                         buf_len = call_pkg->nd_size_in + call_pkg->nd_size_out;
 404                         buf = (void *) call_pkg->nd_payload;
 405                         func = call_pkg->nd_command;
 406                         if (call_pkg->nd_family != nfit_mem->family)
 407                                 return -ENOTTY;
 408                 }
 409
 410                 if (!test_bit(cmd, &cmd_mask)
 411                                 || !test_bit(func, &nfit_mem->dsm_mask))
 412                         return -ENOTTY;
 413
 414                 /* lookup label space for the given dimm */
 415                 for (i = 0; i < ARRAY_SIZE(handle); i++)
 416                         if (__to_nfit_memdev(nfit_mem)->device_handle ==
 417                                         handle[i])
 418                                 break;
 419                 if (i >= ARRAY_SIZE(handle))
 420                         return -ENXIO;
 421
 422                 if ((1 << func) & dimm_fail_cmd_flags[i])
 423                         return -EIO;
 424
 425                 switch (func) {
 426                 case ND_CMD_GET_CONFIG_SIZE:
 427                         rc = nfit_test_cmd_get_config_size(buf, buf_len);
 428                         break;
 429                 case ND_CMD_GET_CONFIG_DATA:
 430                         rc = nfit_test_cmd_get_config_data(buf, buf_len,
 431                                 t->label[i - t->dcr_idx]);
 432                         break;
 433                 case ND_CMD_SET_CONFIG_DATA:
 434                         rc = nfit_test_cmd_set_config_data(buf, buf_len,
 435                                 t->label[i - t->dcr_idx]);
 436                         break;
 437                 case ND_CMD_SMART:
 438                         rc = nfit_test_cmd_smart(buf, buf_len);
 439                         break;
 440                 case ND_CMD_SMART_THRESHOLD:
 441                         rc = nfit_test_cmd_smart_threshold(buf, buf_len);
 442                         device_lock(&t->pdev.dev);
 443                         __acpi_nvdimm_notify(t->dimm_dev[i], 0x81);
 444                         device_unlock(&t->pdev.dev);
 445                         break;
 446                 default:
 447                         return -ENOTTY;
 448                 }
 449         } else {
 450                 struct ars_state *ars_state = &t->ars_state;
 451
 452                 if (!nd_desc || !test_bit(cmd, &nd_desc->cmd_mask))
 453                         return -ENOTTY;
 454
 455                 switch (func) {
 456                 case ND_CMD_ARS_CAP:
 457                         rc = nfit_test_cmd_ars_cap(buf, buf_len);
 458                         break;
 459                 case ND_CMD_ARS_START:
 460                         rc = nfit_test_cmd_ars_start(ars_state, buf, buf_len,
 461                                         cmd_rc);
 462                         break;
 463                 case ND_CMD_ARS_STATUS:
 464                         rc = nfit_test_cmd_ars_status(ars_state, buf, buf_len,
 465                                         cmd_rc);
 466                         break;
 467                 case ND_CMD_CLEAR_ERROR:
 468                         rc = nfit_test_cmd_clear_error(buf, buf_len, cmd_rc);
 469                         break;
 470                 default:
 471                         return -ENOTTY;
 472                 }
 473         }
 474
 475         return rc;
 476 }
 477
 478 static DEFINE_SPINLOCK(nfit_test_lock);
 479 static struct nfit_test *instances[NUM_NFITS];
 480
 481 static void release_nfit_res(void *data)
 482 {
 483         struct nfit_test_resource *nfit_res = data;
 484
 485         spin_lock(&nfit_test_lock);
 486         list_del(&nfit_res->list);
 487         spin_unlock(&nfit_test_lock);
 488
 489         vfree(nfit_res->buf);
 490         kfree(nfit_res);
 491 }
 492
 493 static void *__test_alloc(struct nfit_test *t, size_t size, dma_addr_t *dma,
 494                 void *buf)
 495 {
 496         struct device *dev = &t->pdev.dev;
 497         struct nfit_test_resource *nfit_res = kzalloc(sizeof(*nfit_res),
 498                         GFP_KERNEL);
 499         int rc;
 500
 501         if (!buf || !nfit_res)
 502                 goto err;
 503         rc = devm_add_action(dev, release_nfit_res, nfit_res);
 504         if (rc)
 505                 goto err;
 506         INIT_LIST_HEAD(&nfit_res->list);
 507         memset(buf, 0, size);
 508         nfit_res->dev = dev;
 509         nfit_res->buf = buf;
 510         nfit_res->res.start = *dma;
 511         nfit_res->res.end = *dma + size - 1;
 512         nfit_res->res.name = "NFIT";
 513         spin_lock_init(&nfit_res->lock);
 514         INIT_LIST_HEAD(&nfit_res->requests);
 515         spin_lock(&nfit_test_lock);
 516         list_add(&nfit_res->list, &t->resources);
 517         spin_unlock(&nfit_test_lock);
 518
 519         return nfit_res->buf;
 520  err:
 521         if (buf)
 522                 vfree(buf);
 523         kfree(nfit_res);
 524         return NULL;
 525 }
 526
 527 static void *test_alloc(struct nfit_test *t, size_t size, dma_addr_t *dma)
 528 {
 529         void *buf = vmalloc(size);
 530
 531         *dma = (unsigned long) buf;
 532         return __test_alloc(t, size, dma, buf);
 533 }
 534
 535 static struct nfit_test_resource *nfit_test_lookup(resource_size_t addr)
 536 {
 537         int i;
 538
 539         for (i = 0; i < ARRAY_SIZE(instances); i++) {
 540                 struct nfit_test_resource *n, *nfit_res = NULL;
 541                 struct nfit_test *t = instances[i];
 542
 543                 if (!t)
 544                         continue;
 545                 spin_lock(&nfit_test_lock);
 546                 list_for_each_entry(n, &t->resources, list) {
 547                         if (addr >= n->res.start && (addr < n->res.start
 548                                                 + resource_size(&n->res))) {
 549                                 nfit_res = n;
 550                                 break;
 551                         } else if (addr >= (unsigned long) n->buf
 552                                         && (addr < (unsigned long) n->buf
 553                                                 + resource_size(&n->res))) {
 554                                 nfit_res = n;
 555                                 break;
 556                         }
 557                 }
 558                 spin_unlock(&nfit_test_lock);
 559                 if (nfit_res)
 560                         return nfit_res;
 561         }
 562
 563         return NULL;
 564 }
 565
 566 static int ars_state_init(struct device *dev, struct ars_state *ars_state)
 567 {
 568         ars_state->ars_status = devm_kzalloc(dev,
 569                         sizeof(struct nd_cmd_ars_status)
 570                         + sizeof(struct nd_ars_record) * NFIT_TEST_ARS_RECORDS,
 571                         GFP_KERNEL);
 572         if (!ars_state->ars_status)
 573                 return -ENOMEM;
 574         spin_lock_init(&ars_state->lock);
 575         return 0;
 576 }
 577
 578 static void put_dimms(void *data)
 579 {
 580         struct device **dimm_dev = data;
 581         int i;
 582
 583         for (i = 0; i < NUM_DCR; i++)
 584                 if (dimm_dev[i])
 585                         device_unregister(dimm_dev[i]);
 586 }
 587
 588 static struct class *nfit_test_dimm;
 589
 590 static int dimm_name_to_id(struct device *dev)
 591 {
 592         int dimm;
 593
 594         if (sscanf(dev_name(dev), "test_dimm%d", &dimm) != 1
 595                         || dimm >= NUM_DCR || dimm < 0)
 596                 return -ENXIO;
 597         return dimm;
 598 }
 599
 600
 601 static ssize_t handle_show(struct device *dev, struct device_attribute *attr,
 602                 char *buf)
 603 {
 604         int dimm = dimm_name_to_id(dev);
 605
 606         if (dimm < 0)
 607                 return dimm;
 608
 609         return sprintf(buf, "%#x", handle[dimm]);
 610 }
 611 DEVICE_ATTR_RO(handle);
 612
 613 static ssize_t fail_cmd_show(struct device *dev, struct device_attribute *attr,
 614                 char *buf)
 615 {
 616         int dimm = dimm_name_to_id(dev);
 617
 618         if (dimm < 0)
 619                 return dimm;
 620
 621         return sprintf(buf, "%#lx\n", dimm_fail_cmd_flags[dimm]);
 622 }
 623
 624 static ssize_t fail_cmd_store(struct device *dev, struct device_attribute *attr,
 625                 const char *buf, size_t size)
 626 {
 627         int dimm = dimm_name_to_id(dev);
 628         unsigned long val;
 629         ssize_t rc;
 630
 631         if (dimm < 0)
 632                 return dimm;
 633
 634         rc = kstrtol(buf, 0, &val);
 635         if (rc)
 636                 return rc;
 637
 638         dimm_fail_cmd_flags[dimm] = val;
 639         return size;
 640 }
 641 static DEVICE_ATTR_RW(fail_cmd);
 642
 643 static struct attribute *nfit_test_dimm_attributes[] = {
 644         &dev_attr_fail_cmd.attr,
 645         &dev_attr_handle.attr,
 646         NULL,
 647 };
 648
 649 static struct attribute_group nfit_test_dimm_attribute_group = {
 650         .attrs = nfit_test_dimm_attributes,
 651 };
 652
 653 static const struct attribute_group *nfit_test_dimm_attribute_groups[] = {
 654         &nfit_test_dimm_attribute_group,
 655         NULL,
 656 };
 657
 658 static int nfit_test0_alloc(struct nfit_test *t)
 659 {
 660         size_t nfit_size = sizeof(struct acpi_nfit_system_address) * NUM_SPA
 661                         + sizeof(struct acpi_nfit_memory_map) * NUM_MEM
 662                         + sizeof(struct acpi_nfit_control_region) * NUM_DCR
 663                         + offsetof(struct acpi_nfit_control_region,
 664                                         window_size) * NUM_DCR
 665                         + sizeof(struct acpi_nfit_data_region) * NUM_BDW
 666                         + (sizeof(struct acpi_nfit_flush_address)
 667                                         + sizeof(u64) * NUM_HINTS) * NUM_DCR;
 668         int i;
 669
 670         t->nfit_buf = test_alloc(t, nfit_size, &t->nfit_dma);
 671         if (!t->nfit_buf)
 672                 return -ENOMEM;
 673         t->nfit_size = nfit_size;
 674
 675         t->spa_set[0] = test_alloc(t, SPA0_SIZE, &t->spa_set_dma[0]);
 676         if (!t->spa_set[0])
 677                 return -ENOMEM;
 678
 679         t->spa_set[1] = test_alloc(t, SPA1_SIZE, &t->spa_set_dma[1]);
 680         if (!t->spa_set[1])
 681                 return -ENOMEM;
 682
 683         t->spa_set[2] = test_alloc(t, SPA0_SIZE, &t->spa_set_dma[2]);
 684         if (!t->spa_set[2])
 685                 return -ENOMEM;
 686
 687         for (i = 0; i < t->num_dcr; i++) {
 688                 t->dimm[i] = test_alloc(t, DIMM_SIZE, &t->dimm_dma[i]);
 689                 if (!t->dimm[i])
 690                         return -ENOMEM;
 691
 692                 t->label[i] = test_alloc(t, LABEL_SIZE, &t->label_dma[i]);
 693                 if (!t->label[i])
 694                         return -ENOMEM;
 695                 sprintf(t->label[i], "label%d", i);
 696
 697                 t->flush[i] = test_alloc(t, max(PAGE_SIZE,
 698                                         sizeof(u64) * NUM_HINTS),
 699                                 &t->flush_dma[i]);
 700                 if (!t->flush[i])
 701                         return -ENOMEM;
 702         }
 703
 704         for (i = 0; i < t->num_dcr; i++) {
 705                 t->dcr[i] = test_alloc(t, LABEL_SIZE, &t->dcr_dma[i]);
 706                 if (!t->dcr[i])
 707                         return -ENOMEM;
 708         }
 709
 710         t->_fit = test_alloc(t, sizeof(union acpi_object **), &t->_fit_dma);
 711         if (!t->_fit)
 712                 return -ENOMEM;
 713
 714         if (devm_add_action_or_reset(&t->pdev.dev, put_dimms, t->dimm_dev))
 715                 return -ENOMEM;
 716         for (i = 0; i < NUM_DCR; i++) {
 717                 t->dimm_dev[i] = device_create_with_groups(nfit_test_dimm,
 718                                 &t->pdev.dev, 0, NULL,
 719                                 nfit_test_dimm_attribute_groups,
 720                                 "test_dimm%d", i);
 721                 if (!t->dimm_dev[i])
 722                         return -ENOMEM;
 723         }
 724
 725         return ars_state_init(&t->pdev.dev, &t->ars_state);
 726 }
 727
 728 static int nfit_test1_alloc(struct nfit_test *t)
 729 {
 730         size_t nfit_size = sizeof(struct acpi_nfit_system_address) * 2
 731                 + sizeof(struct acpi_nfit_memory_map)
 732                 + offsetof(struct acpi_nfit_control_region, window_size);
 733         int i;
 734
 735         t->nfit_buf = test_alloc(t, nfit_size, &t->nfit_dma);
 736         if (!t->nfit_buf)
 737                 return -ENOMEM;
 738         t->nfit_size = nfit_size;
 739
 740         t->spa_set[0] = test_alloc(t, SPA2_SIZE, &t->spa_set_dma[0]);
 741         if (!t->spa_set[0])
 742                 return -ENOMEM;
 743
 744         for (i = 0; i < t->num_dcr; i++) {
 745                 t->label[i] = test_alloc(t, LABEL_SIZE, &t->label_dma[i]);
 746                 if (!t->label[i])
 747                         return -ENOMEM;
 748                 sprintf(t->label[i], "label%d", i);
 749         }
 750
 751         t->spa_set[1] = test_alloc(t, SPA_VCD_SIZE, &t->spa_set_dma[1]);
 752         if (!t->spa_set[1])
 753                 return -ENOMEM;
 754
 755         return ars_state_init(&t->pdev.dev, &t->ars_state);
 756 }
 757
 758 static void dcr_common_init(struct acpi_nfit_control_region *dcr)
 759 {
 760         dcr->vendor_id = 0xabcd;
 761         dcr->device_id = 0;
 762         dcr->revision_id = 1;
 763         dcr->valid_fields = 1;
 764         dcr->manufacturing_location = 0xa;
 765         dcr->manufacturing_date = cpu_to_be16(2016);
 766 }
 767
 768 static void nfit_test0_setup(struct nfit_test *t)
 769 {
 770         const int flush_hint_size = sizeof(struct acpi_nfit_flush_address)
 771                 + (sizeof(u64) * NUM_HINTS);
 772         struct acpi_nfit_desc *acpi_desc;
 773         struct acpi_nfit_memory_map *memdev;
 774         void *nfit_buf = t->nfit_buf;
 775         struct acpi_nfit_system_address *spa;
 776         struct acpi_nfit_control_region *dcr;
 777         struct acpi_nfit_data_region *bdw;
 778         struct acpi_nfit_flush_address *flush;
 779         unsigned int offset, i;
 780
 781         /*
 782          * spa0 (interleave first half of dimm0 and dimm1, note storage
 783          * does not actually alias the related block-data-window
 784          * regions)
 785          */
 786         spa = nfit_buf;
 787         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 788         spa->header.length = sizeof(*spa);
 789         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16);
 790         spa->range_index = 0+1;
 791         spa->address = t->spa_set_dma[0];
 792         spa->length = SPA0_SIZE;
 793
 794         /*
 795          * spa1 (interleave last half of the 4 DIMMS, note storage
 796          * does not actually alias the related block-data-window
 797          * regions)
 798          */
 799         spa = nfit_buf + sizeof(*spa);
 800         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 801         spa->header.length = sizeof(*spa);
 802         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16);
 803         spa->range_index = 1+1;
 804         spa->address = t->spa_set_dma[1];
 805         spa->length = SPA1_SIZE;
 806
 807         /* spa2 (dcr0) dimm0 */
 808         spa = nfit_buf + sizeof(*spa) * 2;
 809         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 810         spa->header.length = sizeof(*spa);
 811         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
 812         spa->range_index = 2+1;
 813         spa->address = t->dcr_dma[0];
 814         spa->length = DCR_SIZE;
 815
 816         /* spa3 (dcr1) dimm1 */
 817         spa = nfit_buf + sizeof(*spa) * 3;
 818         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 819         spa->header.length = sizeof(*spa);
 820         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
 821         spa->range_index = 3+1;
 822         spa->address = t->dcr_dma[1];
 823         spa->length = DCR_SIZE;
 824
 825         /* spa4 (dcr2) dimm2 */
 826         spa = nfit_buf + sizeof(*spa) * 4;
 827         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 828         spa->header.length = sizeof(*spa);
 829         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
 830         spa->range_index = 4+1;
 831         spa->address = t->dcr_dma[2];
 832         spa->length = DCR_SIZE;
 833
 834         /* spa5 (dcr3) dimm3 */
 835         spa = nfit_buf + sizeof(*spa) * 5;
 836         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 837         spa->header.length = sizeof(*spa);
 838         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
 839         spa->range_index = 5+1;
 840         spa->address = t->dcr_dma[3];
 841         spa->length = DCR_SIZE;
 842
 843         /* spa6 (bdw for dcr0) dimm0 */
 844         spa = nfit_buf + sizeof(*spa) * 6;
 845         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 846         spa->header.length = sizeof(*spa);
 847         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
 848         spa->range_index = 6+1;
 849         spa->address = t->dimm_dma[0];
 850         spa->length = DIMM_SIZE;
 851
 852         /* spa7 (bdw for dcr1) dimm1 */
 853         spa = nfit_buf + sizeof(*spa) * 7;
 854         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 855         spa->header.length = sizeof(*spa);
 856         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
 857         spa->range_index = 7+1;
 858         spa->address = t->dimm_dma[1];
 859         spa->length = DIMM_SIZE;
 860
 861         /* spa8 (bdw for dcr2) dimm2 */
 862         spa = nfit_buf + sizeof(*spa) * 8;
 863         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 864         spa->header.length = sizeof(*spa);
 865         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
 866         spa->range_index = 8+1;
 867         spa->address = t->dimm_dma[2];
 868         spa->length = DIMM_SIZE;
 869
 870         /* spa9 (bdw for dcr3) dimm3 */
 871         spa = nfit_buf + sizeof(*spa) * 9;
 872         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 873         spa->header.length = sizeof(*spa);
 874         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
 875         spa->range_index = 9+1;
 876         spa->address = t->dimm_dma[3];
 877         spa->length = DIMM_SIZE;
 878
 879         offset = sizeof(*spa) * 10;
 880         /* mem-region0 (spa0, dimm0) */
 881         memdev = nfit_buf + offset;
 882         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 883         memdev->header.length = sizeof(*memdev);
 884         memdev->device_handle = handle[0];
 885         memdev->physical_id = 0;
 886         memdev->region_id = 0;
 887         memdev->range_index = 0+1;
 888         memdev->region_index = 4+1;
 889         memdev->region_size = SPA0_SIZE/2;
 890         memdev->region_offset = 1;
 891         memdev->address = 0;
 892         memdev->interleave_index = 0;
 893         memdev->interleave_ways = 2;
 894
 895         /* mem-region1 (spa0, dimm1) */
 896         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map);
 897         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 898         memdev->header.length = sizeof(*memdev);
 899         memdev->device_handle = handle[1];
 900         memdev->physical_id = 1;
 901         memdev->region_id = 0;
 902         memdev->range_index = 0+1;
 903         memdev->region_index = 5+1;
 904         memdev->region_size = SPA0_SIZE/2;
 905         memdev->region_offset = (1 << 8);
 906         memdev->address = 0;
 907         memdev->interleave_index = 0;
 908         memdev->interleave_ways = 2;
 909
 910         /* mem-region2 (spa1, dimm0) */
 911         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 2;
 912         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 913         memdev->header.length = sizeof(*memdev);
 914         memdev->device_handle = handle[0];
 915         memdev->physical_id = 0;
 916         memdev->region_id = 1;
 917         memdev->range_index = 1+1;
 918         memdev->region_index = 4+1;
 919         memdev->region_size = SPA1_SIZE/4;
 920         memdev->region_offset = (1 << 16);
 921         memdev->address = SPA0_SIZE/2;
 922         memdev->interleave_index = 0;
 923         memdev->interleave_ways = 4;
 924
 925         /* mem-region3 (spa1, dimm1) */
 926         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 3;
 927         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 928         memdev->header.length = sizeof(*memdev);
 929         memdev->device_handle = handle[1];
 930         memdev->physical_id = 1;
 931         memdev->region_id = 1;
 932         memdev->range_index = 1+1;
 933         memdev->region_index = 5+1;
 934         memdev->region_size = SPA1_SIZE/4;
 935         memdev->region_offset = (1 << 24);
 936         memdev->address = SPA0_SIZE/2;
 937         memdev->interleave_index = 0;
 938         memdev->interleave_ways = 4;
 939
 940         /* mem-region4 (spa1, dimm2) */
 941         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 4;
 942         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 943         memdev->header.length = sizeof(*memdev);
 944         memdev->device_handle = handle[2];
 945         memdev->physical_id = 2;
 946         memdev->region_id = 0;
 947         memdev->range_index = 1+1;
 948         memdev->region_index = 6+1;
 949         memdev->region_size = SPA1_SIZE/4;
 950         memdev->region_offset = (1ULL << 32);
 951         memdev->address = SPA0_SIZE/2;
 952         memdev->interleave_index = 0;
 953         memdev->interleave_ways = 4;
 954
 955         /* mem-region5 (spa1, dimm3) */
 956         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 5;
 957         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 958         memdev->header.length = sizeof(*memdev);
 959         memdev->device_handle = handle[3];
 960         memdev->physical_id = 3;
 961         memdev->region_id = 0;
 962         memdev->range_index = 1+1;
 963         memdev->region_index = 7+1;
 964         memdev->region_size = SPA1_SIZE/4;
 965         memdev->region_offset = (1ULL << 40);
 966         memdev->address = SPA0_SIZE/2;
 967         memdev->interleave_index = 0;
 968         memdev->interleave_ways = 4;
 969
 970         /* mem-region6 (spa/dcr0, dimm0) */
 971         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 6;
 972         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 973         memdev->header.length = sizeof(*memdev);
 974         memdev->device_handle = handle[0];
 975         memdev->physical_id = 0;
 976         memdev->region_id = 0;
 977         memdev->range_index = 2+1;
 978         memdev->region_index = 0+1;
 979         memdev->region_size = 0;
 980         memdev->region_offset = 0;
 981         memdev->address = 0;
 982         memdev->interleave_index = 0;
 983         memdev->interleave_ways = 1;
 984
 985         /* mem-region7 (spa/dcr1, dimm1) */
 986         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 7;
 987         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 988         memdev->header.length = sizeof(*memdev);
 989         memdev->device_handle = handle[1];
 990         memdev->physical_id = 1;
 991         memdev->region_id = 0;
 992         memdev->range_index = 3+1;
 993         memdev->region_index = 1+1;
 994         memdev->region_size = 0;
 995         memdev->region_offset = 0;
 996         memdev->address = 0;
 997         memdev->interleave_index = 0;
 998         memdev->interleave_ways = 1;
 999
1000         /* mem-region8 (spa/dcr2, dimm2) */
1001         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 8;
1002         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1003         memdev->header.length = sizeof(*memdev);
1004         memdev->device_handle = handle[2];
1005         memdev->physical_id = 2;
1006         memdev->region_id = 0;
1007         memdev->range_index = 4+1;
1008         memdev->region_index = 2+1;
1009         memdev->region_size = 0;
1010         memdev->region_offset = 0;
1011         memdev->address = 0;
1012         memdev->interleave_index = 0;
1013         memdev->interleave_ways = 1;
1014
1015         /* mem-region9 (spa/dcr3, dimm3) */
1016         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 9;
1017         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1018         memdev->header.length = sizeof(*memdev);
1019         memdev->device_handle = handle[3];
1020         memdev->physical_id = 3;
1021         memdev->region_id = 0;
1022         memdev->range_index = 5+1;
1023         memdev->region_index = 3+1;
1024         memdev->region_size = 0;
1025         memdev->region_offset = 0;
1026         memdev->address = 0;
1027         memdev->interleave_index = 0;
1028         memdev->interleave_ways = 1;
1029
1030         /* mem-region10 (spa/bdw0, dimm0) */
1031         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 10;
1032         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1033         memdev->header.length = sizeof(*memdev);
1034         memdev->device_handle = handle[0];
1035         memdev->physical_id = 0;
1036         memdev->region_id = 0;
1037         memdev->range_index = 6+1;
1038         memdev->region_index = 0+1;
1039         memdev->region_size = 0;
1040         memdev->region_offset = 0;
1041         memdev->address = 0;
1042         memdev->interleave_index = 0;
1043         memdev->interleave_ways = 1;
1044
1045         /* mem-region11 (spa/bdw1, dimm1) */
1046         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 11;
1047         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1048         memdev->header.length = sizeof(*memdev);
1049         memdev->device_handle = handle[1];
1050         memdev->physical_id = 1;
1051         memdev->region_id = 0;
1052         memdev->range_index = 7+1;
1053         memdev->region_index = 1+1;
1054         memdev->region_size = 0;
1055         memdev->region_offset = 0;
1056         memdev->address = 0;
1057         memdev->interleave_index = 0;
1058         memdev->interleave_ways = 1;
1059
1060         /* mem-region12 (spa/bdw2, dimm2) */
1061         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 12;
1062         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1063         memdev->header.length = sizeof(*memdev);
1064         memdev->device_handle = handle[2];
1065         memdev->physical_id = 2;
1066         memdev->region_id = 0;
1067         memdev->range_index = 8+1;
1068         memdev->region_index = 2+1;
1069         memdev->region_size = 0;
1070         memdev->region_offset = 0;
1071         memdev->address = 0;
1072         memdev->interleave_index = 0;
1073         memdev->interleave_ways = 1;
1074
1075         /* mem-region13 (spa/dcr3, dimm3) */
1076         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 13;
1077         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1078         memdev->header.length = sizeof(*memdev);
1079         memdev->device_handle = handle[3];
1080         memdev->physical_id = 3;
1081         memdev->region_id = 0;
1082         memdev->range_index = 9+1;
1083         memdev->region_index = 3+1;
1084         memdev->region_size = 0;
1085         memdev->region_offset = 0;
1086         memdev->address = 0;
1087         memdev->interleave_index = 0;
1088         memdev->interleave_ways = 1;
1089
1090         offset = offset + sizeof(struct acpi_nfit_memory_map) * 14;
1091         /* dcr-descriptor0: blk */
1092         dcr = nfit_buf + offset;
1093         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1094         dcr->header.length = sizeof(struct acpi_nfit_control_region);
1095         dcr->region_index = 0+1;
1096         dcr_common_init(dcr);
1097         dcr->serial_number = ~handle[0];
1098         dcr->code = NFIT_FIC_BLK;
1099         dcr->windows = 1;
1100         dcr->window_size = DCR_SIZE;
1101         dcr->command_offset = 0;
1102         dcr->command_size = 8;
1103         dcr->status_offset = 8;
1104         dcr->status_size = 4;
1105
1106         /* dcr-descriptor1: blk */
1107         dcr = nfit_buf + offset + sizeof(struct acpi_nfit_control_region);
1108         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1109         dcr->header.length = sizeof(struct acpi_nfit_control_region);
1110         dcr->region_index = 1+1;
1111         dcr_common_init(dcr);
1112         dcr->serial_number = ~handle[1];
1113         dcr->code = NFIT_FIC_BLK;
1114         dcr->windows = 1;
1115         dcr->window_size = DCR_SIZE;
1116         dcr->command_offset = 0;
1117         dcr->command_size = 8;
1118         dcr->status_offset = 8;
1119         dcr->status_size = 4;
1120
1121         /* dcr-descriptor2: blk */
1122         dcr = nfit_buf + offset + sizeof(struct acpi_nfit_control_region) * 2;
1123         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1124         dcr->header.length = sizeof(struct acpi_nfit_control_region);
1125         dcr->region_index = 2+1;
1126         dcr_common_init(dcr);
1127         dcr->serial_number = ~handle[2];
1128         dcr->code = NFIT_FIC_BLK;
1129         dcr->windows = 1;
1130         dcr->window_size = DCR_SIZE;
1131         dcr->command_offset = 0;
1132         dcr->command_size = 8;
1133         dcr->status_offset = 8;
1134         dcr->status_size = 4;
1135
1136         /* dcr-descriptor3: blk */
1137         dcr = nfit_buf + offset + sizeof(struct acpi_nfit_control_region) * 3;
1138         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1139         dcr->header.length = sizeof(struct acpi_nfit_control_region);
1140         dcr->region_index = 3+1;
1141         dcr_common_init(dcr);
1142         dcr->serial_number = ~handle[3];
1143         dcr->code = NFIT_FIC_BLK;
1144         dcr->windows = 1;
1145         dcr->window_size = DCR_SIZE;
1146         dcr->command_offset = 0;
1147         dcr->command_size = 8;
1148         dcr->status_offset = 8;
1149         dcr->status_size = 4;
1150
1151         offset = offset + sizeof(struct acpi_nfit_control_region) * 4;
1152         /* dcr-descriptor0: pmem */
1153         dcr = nfit_buf + offset;
1154         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1155         dcr->header.length = offsetof(struct acpi_nfit_control_region,
1156                         window_size);
1157         dcr->region_index = 4+1;
1158         dcr_common_init(dcr);
1159         dcr->serial_number = ~handle[0];
1160         dcr->code = NFIT_FIC_BYTEN;
1161         dcr->windows = 0;
1162
1163         /* dcr-descriptor1: pmem */
1164         dcr = nfit_buf + offset + offsetof(struct acpi_nfit_control_region,
1165                         window_size);
1166         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1167         dcr->header.length = offsetof(struct acpi_nfit_control_region,
1168                         window_size);
1169         dcr->region_index = 5+1;
1170         dcr_common_init(dcr);
1171         dcr->serial_number = ~handle[1];
1172         dcr->code = NFIT_FIC_BYTEN;
1173         dcr->windows = 0;
1174
1175         /* dcr-descriptor2: pmem */
1176         dcr = nfit_buf + offset + offsetof(struct acpi_nfit_control_region,
1177                         window_size) * 2;
1178         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1179         dcr->header.length = offsetof(struct acpi_nfit_control_region,
1180                         window_size);
1181         dcr->region_index = 6+1;
1182         dcr_common_init(dcr);
1183         dcr->serial_number = ~handle[2];
1184         dcr->code = NFIT_FIC_BYTEN;
1185         dcr->windows = 0;
1186
1187         /* dcr-descriptor3: pmem */
1188         dcr = nfit_buf + offset + offsetof(struct acpi_nfit_control_region,
1189                         window_size) * 3;
1190         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1191         dcr->header.length = offsetof(struct acpi_nfit_control_region,
1192                         window_size);
1193         dcr->region_index = 7+1;
1194         dcr_common_init(dcr);
1195         dcr->serial_number = ~handle[3];
1196         dcr->code = NFIT_FIC_BYTEN;
1197         dcr->windows = 0;
1198
1199         offset = offset + offsetof(struct acpi_nfit_control_region,
1200                         window_size) * 4;
1201         /* bdw0 (spa/dcr0, dimm0) */
1202         bdw = nfit_buf + offset;
1203         bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
1204         bdw->header.length = sizeof(struct acpi_nfit_data_region);
1205         bdw->region_index = 0+1;
1206         bdw->windows = 1;
1207         bdw->offset = 0;
1208         bdw->size = BDW_SIZE;
1209         bdw->capacity = DIMM_SIZE;
1210         bdw->start_address = 0;
1211
1212         /* bdw1 (spa/dcr1, dimm1) */
1213         bdw = nfit_buf + offset + sizeof(struct acpi_nfit_data_region);
1214         bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
1215         bdw->header.length = sizeof(struct acpi_nfit_data_region);
1216         bdw->region_index = 1+1;
1217         bdw->windows = 1;
1218         bdw->offset = 0;
1219         bdw->size = BDW_SIZE;
1220         bdw->capacity = DIMM_SIZE;
1221         bdw->start_address = 0;
1222
1223         /* bdw2 (spa/dcr2, dimm2) */
1224         bdw = nfit_buf + offset + sizeof(struct acpi_nfit_data_region) * 2;
1225         bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
1226         bdw->header.length = sizeof(struct acpi_nfit_data_region);
1227         bdw->region_index = 2+1;
1228         bdw->windows = 1;
1229         bdw->offset = 0;
1230         bdw->size = BDW_SIZE;
1231         bdw->capacity = DIMM_SIZE;
1232         bdw->start_address = 0;
1233
1234         /* bdw3 (spa/dcr3, dimm3) */
1235         bdw = nfit_buf + offset + sizeof(struct acpi_nfit_data_region) * 3;
1236         bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
1237         bdw->header.length = sizeof(struct acpi_nfit_data_region);
1238         bdw->region_index = 3+1;
1239         bdw->windows = 1;
1240         bdw->offset = 0;
1241         bdw->size = BDW_SIZE;
1242         bdw->capacity = DIMM_SIZE;
1243         bdw->start_address = 0;
1244
1245         offset = offset + sizeof(struct acpi_nfit_data_region) * 4;
1246         /* flush0 (dimm0) */
1247         flush = nfit_buf + offset;
1248         flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
1249         flush->header.length = flush_hint_size;
1250         flush->device_handle = handle[0];
1251         flush->hint_count = NUM_HINTS;
1252         for (i = 0; i < NUM_HINTS; i++)
1253                 flush->hint_address[i] = t->flush_dma[0] + i * sizeof(u64);
1254
1255         /* flush1 (dimm1) */
1256         flush = nfit_buf + offset + flush_hint_size * 1;
1257         flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
1258         flush->header.length = flush_hint_size;
1259         flush->device_handle = handle[1];
1260         flush->hint_count = NUM_HINTS;
1261         for (i = 0; i < NUM_HINTS; i++)
1262                 flush->hint_address[i] = t->flush_dma[1] + i * sizeof(u64);
1263
1264         /* flush2 (dimm2) */
1265         flush = nfit_buf + offset + flush_hint_size  * 2;
1266         flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
1267         flush->header.length = flush_hint_size;
1268         flush->device_handle = handle[2];
1269         flush->hint_count = NUM_HINTS;
1270         for (i = 0; i < NUM_HINTS; i++)
1271                 flush->hint_address[i] = t->flush_dma[2] + i * sizeof(u64);
1272
1273         /* flush3 (dimm3) */
1274         flush = nfit_buf + offset + flush_hint_size * 3;
1275         flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
1276         flush->header.length = flush_hint_size;
1277         flush->device_handle = handle[3];
1278         flush->hint_count = NUM_HINTS;
1279         for (i = 0; i < NUM_HINTS; i++)
1280                 flush->hint_address[i] = t->flush_dma[3] + i * sizeof(u64);
1281
1282         if (t->setup_hotplug) {
1283                 offset = offset + flush_hint_size * 4;
1284                 /* dcr-descriptor4: blk */
1285                 dcr = nfit_buf + offset;
1286                 dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1287                 dcr->header.length = sizeof(struct acpi_nfit_control_region);
1288                 dcr->region_index = 8+1;
1289                 dcr_common_init(dcr);
1290                 dcr->serial_number = ~handle[4];
1291                 dcr->code = NFIT_FIC_BLK;
1292                 dcr->windows = 1;
1293                 dcr->window_size = DCR_SIZE;
1294                 dcr->command_offset = 0;
1295                 dcr->command_size = 8;
1296                 dcr->status_offset = 8;
1297                 dcr->status_size = 4;
1298
1299                 offset = offset + sizeof(struct acpi_nfit_control_region);
1300                 /* dcr-descriptor4: pmem */
1301                 dcr = nfit_buf + offset;
1302                 dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1303                 dcr->header.length = offsetof(struct acpi_nfit_control_region,
1304                                 window_size);
1305                 dcr->region_index = 9+1;
1306                 dcr_common_init(dcr);
1307                 dcr->serial_number = ~handle[4];
1308                 dcr->code = NFIT_FIC_BYTEN;
1309                 dcr->windows = 0;
1310
1311                 offset = offset + offsetof(struct acpi_nfit_control_region,
1312                                 window_size);
1313                 /* bdw4 (spa/dcr4, dimm4) */
1314                 bdw = nfit_buf + offset;
1315                 bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
1316                 bdw->header.length = sizeof(struct acpi_nfit_data_region);
1317                 bdw->region_index = 8+1;
1318                 bdw->windows = 1;
1319                 bdw->offset = 0;
1320                 bdw->size = BDW_SIZE;
1321                 bdw->capacity = DIMM_SIZE;
1322                 bdw->start_address = 0;
1323
1324                 offset = offset + sizeof(struct acpi_nfit_data_region);
1325                 /* spa10 (dcr4) dimm4 */
1326                 spa = nfit_buf + offset;
1327                 spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1328                 spa->header.length = sizeof(*spa);
1329                 memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
1330                 spa->range_index = 10+1;
1331                 spa->address = t->dcr_dma[4];
1332                 spa->length = DCR_SIZE;
1333
1334                 /*
1335                  * spa11 (single-dimm interleave for hotplug, note storage
1336                  * does not actually alias the related block-data-window
1337                  * regions)
1338                  */
1339                 spa = nfit_buf + offset + sizeof(*spa);
1340                 spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1341                 spa->header.length = sizeof(*spa);
1342                 memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16);
1343                 spa->range_index = 11+1;
1344                 spa->address = t->spa_set_dma[2];
1345                 spa->length = SPA0_SIZE;
1346
1347                 /* spa12 (bdw for dcr4) dimm4 */
1348                 spa = nfit_buf + offset + sizeof(*spa) * 2;
1349                 spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1350                 spa->header.length = sizeof(*spa);
1351                 memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
1352                 spa->range_index = 12+1;
1353                 spa->address = t->dimm_dma[4];
1354                 spa->length = DIMM_SIZE;
1355
1356                 offset = offset + sizeof(*spa) * 3;
1357                 /* mem-region14 (spa/dcr4, dimm4) */
1358                 memdev = nfit_buf + offset;
1359                 memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1360                 memdev->header.length = sizeof(*memdev);
1361                 memdev->device_handle = handle[4];
1362                 memdev->physical_id = 4;
1363                 memdev->region_id = 0;
1364                 memdev->range_index = 10+1;
1365                 memdev->region_index = 8+1;
1366                 memdev->region_size = 0;
1367                 memdev->region_offset = 0;
1368                 memdev->address = 0;
1369                 memdev->interleave_index = 0;
1370                 memdev->interleave_ways = 1;
1371
1372                 /* mem-region15 (spa0, dimm4) */
1373                 memdev = nfit_buf + offset +
1374                                 sizeof(struct acpi_nfit_memory_map);
1375                 memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1376                 memdev->header.length = sizeof(*memdev);
1377                 memdev->device_handle = handle[4];
1378                 memdev->physical_id = 4;
1379                 memdev->region_id = 0;
1380                 memdev->range_index = 11+1;
1381                 memdev->region_index = 9+1;
1382                 memdev->region_size = SPA0_SIZE;
1383                 memdev->region_offset = (1ULL << 48);
1384                 memdev->address = 0;
1385                 memdev->interleave_index = 0;
1386                 memdev->interleave_ways = 1;
1387
1388                 /* mem-region16 (spa/bdw4, dimm4) */
1389                 memdev = nfit_buf + offset +
1390                                 sizeof(struct acpi_nfit_memory_map) * 2;
1391                 memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1392                 memdev->header.length = sizeof(*memdev);
1393                 memdev->device_handle = handle[4];
1394                 memdev->physical_id = 4;
1395                 memdev->region_id = 0;
1396                 memdev->range_index = 12+1;
1397                 memdev->region_index = 8+1;
1398                 memdev->region_size = 0;
1399                 memdev->region_offset = 0;
1400                 memdev->address = 0;
1401                 memdev->interleave_index = 0;
1402                 memdev->interleave_ways = 1;
1403
1404                 offset = offset + sizeof(struct acpi_nfit_memory_map) * 3;
1405                 /* flush3 (dimm4) */
1406                 flush = nfit_buf + offset;
1407                 flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
1408                 flush->header.length = flush_hint_size;
1409                 flush->device_handle = handle[4];
1410                 flush->hint_count = NUM_HINTS;
1411                 for (i = 0; i < NUM_HINTS; i++)
1412                         flush->hint_address[i] = t->flush_dma[4]
1413                                 + i * sizeof(u64);
1414         }
1415
1416         post_ars_status(&t->ars_state, t->spa_set_dma[0], SPA0_SIZE);
1417
1418         acpi_desc = &t->acpi_desc;
1419         set_bit(ND_CMD_GET_CONFIG_SIZE, &acpi_desc->dimm_cmd_force_en);
1420         set_bit(ND_CMD_GET_CONFIG_DATA, &acpi_desc->dimm_cmd_force_en);
1421         set_bit(ND_CMD_SET_CONFIG_DATA, &acpi_desc->dimm_cmd_force_en);
1422         set_bit(ND_CMD_SMART, &acpi_desc->dimm_cmd_force_en);
1423         set_bit(ND_CMD_ARS_CAP, &acpi_desc->bus_cmd_force_en);
1424         set_bit(ND_CMD_ARS_START, &acpi_desc->bus_cmd_force_en);
1425         set_bit(ND_CMD_ARS_STATUS, &acpi_desc->bus_cmd_force_en);
1426         set_bit(ND_CMD_CLEAR_ERROR, &acpi_desc->bus_cmd_force_en);
1427         set_bit(ND_CMD_SMART_THRESHOLD, &acpi_desc->dimm_cmd_force_en);
1428 }
1429
1430 static void nfit_test1_setup(struct nfit_test *t)
1431 {
1432         size_t offset;
1433         void *nfit_buf = t->nfit_buf;
1434         struct acpi_nfit_memory_map *memdev;
1435         struct acpi_nfit_control_region *dcr;
1436         struct acpi_nfit_system_address *spa;
1437         struct acpi_nfit_desc *acpi_desc;
1438
1439         offset = 0;
1440         /* spa0 (flat range with no bdw aliasing) */
1441         spa = nfit_buf + offset;
1442         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1443         spa->header.length = sizeof(*spa);
1444         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16);
1445         spa->range_index = 0+1;
1446         spa->address = t->spa_set_dma[0];
1447         spa->length = SPA2_SIZE;
1448
1449         /* virtual cd region */
1450         spa = nfit_buf + sizeof(*spa);
1451         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1452         spa->header.length = sizeof(*spa);
1453         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_VCD), 16);
1454         spa->range_index = 0;
1455         spa->address = t->spa_set_dma[1];
1456         spa->length = SPA_VCD_SIZE;
1457
1458         offset += sizeof(*spa) * 2;
1459         /* mem-region0 (spa0, dimm0) */
1460         memdev = nfit_buf + offset;
1461         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1462         memdev->header.length = sizeof(*memdev);
1463         memdev->device_handle = handle[5];
1464         memdev->physical_id = 0;
1465         memdev->region_id = 0;
1466         memdev->range_index = 0+1;
1467         memdev->region_index = 0+1;
1468         memdev->region_size = SPA2_SIZE;
1469         memdev->region_offset = 0;
1470         memdev->address = 0;
1471         memdev->interleave_index = 0;
1472         memdev->interleave_ways = 1;
1473         memdev->flags = ACPI_NFIT_MEM_SAVE_FAILED | ACPI_NFIT_MEM_RESTORE_FAILED
1474                 | ACPI_NFIT_MEM_FLUSH_FAILED | ACPI_NFIT_MEM_HEALTH_OBSERVED
1475                 | ACPI_NFIT_MEM_NOT_ARMED;
1476
1477         offset += sizeof(*memdev);
1478         /* dcr-descriptor0 */
1479         dcr = nfit_buf + offset;
1480         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1481         dcr->header.length = offsetof(struct acpi_nfit_control_region,
1482                         window_size);
1483         dcr->region_index = 0+1;
1484         dcr_common_init(dcr);
1485         dcr->serial_number = ~handle[5];
1486         dcr->code = NFIT_FIC_BYTE;
1487         dcr->windows = 0;
1488
1489         post_ars_status(&t->ars_state, t->spa_set_dma[0], SPA2_SIZE);
1490
1491         acpi_desc = &t->acpi_desc;
1492         set_bit(ND_CMD_ARS_CAP, &acpi_desc->bus_cmd_force_en);
1493         set_bit(ND_CMD_ARS_START, &acpi_desc->bus_cmd_force_en);
1494         set_bit(ND_CMD_ARS_STATUS, &acpi_desc->bus_cmd_force_en);
1495         set_bit(ND_CMD_CLEAR_ERROR, &acpi_desc->bus_cmd_force_en);
1496         set_bit(ND_CMD_GET_CONFIG_SIZE, &acpi_desc->dimm_cmd_force_en);
1497         set_bit(ND_CMD_GET_CONFIG_DATA, &acpi_desc->dimm_cmd_force_en);
1498         set_bit(ND_CMD_SET_CONFIG_DATA, &acpi_desc->dimm_cmd_force_en);
1499 }
1500
1501 static int nfit_test_blk_do_io(struct nd_blk_region *ndbr, resource_size_t dpa,
1502                 void *iobuf, u64 len, int rw)
1503 {
1504         struct nfit_blk *nfit_blk = ndbr->blk_provider_data;
1505         struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
1506         struct nd_region *nd_region = &ndbr->nd_region;
1507         unsigned int lane;
1508
1509         lane = nd_region_acquire_lane(nd_region);
1510         if (rw)
1511                 memcpy(mmio->addr.base + dpa, iobuf, len);
1512         else {
1513                 memcpy(iobuf, mmio->addr.base + dpa, len);
1514
1515                 /* give us some some coverage of the mmio_flush_range() API */
1516                 mmio_flush_range(mmio->addr.base + dpa, len);
1517         }
1518         nd_region_release_lane(nd_region, lane);
1519
1520         return 0;
1521 }
1522
1523 static unsigned long nfit_ctl_handle;
1524
1525 union acpi_object *result;
1526
1527 static union acpi_object *nfit_test_evaluate_dsm(acpi_handle handle,
1528                 const u8 *uuid, u64 rev, u64 func, union acpi_object *argv4)
1529 {
1530         if (handle != &nfit_ctl_handle)
1531                 return ERR_PTR(-ENXIO);
1532
1533         return result;
1534 }
1535
1536 static int setup_result(void *buf, size_t size)
1537 {
1538         result = kmalloc(sizeof(union acpi_object) + size, GFP_KERNEL);
1539         if (!result)
1540                 return -ENOMEM;
1541         result->package.type = ACPI_TYPE_BUFFER,
1542         result->buffer.pointer = (void *) (result + 1);
1543         result->buffer.length = size;
1544         memcpy(result->buffer.pointer, buf, size);
1545         memset(buf, 0, size);
1546         return 0;
1547 }
1548
1549 static int nfit_ctl_test(struct device *dev)
1550 {
1551         int rc, cmd_rc;
1552         struct nvdimm *nvdimm;
1553         struct acpi_device *adev;
1554         struct nfit_mem *nfit_mem;
1555         struct nd_ars_record *record;
1556         struct acpi_nfit_desc *acpi_desc;
1557         const u64 test_val = 0x0123456789abcdefULL;
1558         unsigned long mask, cmd_size, offset;
1559         union {
1560                 struct nd_cmd_get_config_size cfg_size;
1561                 struct nd_cmd_ars_status ars_stat;
1562                 struct nd_cmd_ars_cap ars_cap;
1563                 char buf[sizeof(struct nd_cmd_ars_status)
1564                         + sizeof(struct nd_ars_record)];
1565         } cmds;
1566
1567         adev = devm_kzalloc(dev, sizeof(*adev), GFP_KERNEL);
1568         if (!adev)
1569                 return -ENOMEM;
1570         *adev = (struct acpi_device) {
1571                 .handle = &nfit_ctl_handle,
1572                 .dev = {
1573                         .init_name = "test-adev",
1574                 },
1575         };
1576
1577         acpi_desc = devm_kzalloc(dev, sizeof(*acpi_desc), GFP_KERNEL);
1578         if (!acpi_desc)
1579                 return -ENOMEM;
1580         *acpi_desc = (struct acpi_nfit_desc) {
1581                 .nd_desc = {
1582                         .cmd_mask = 1UL << ND_CMD_ARS_CAP
1583                                 | 1UL << ND_CMD_ARS_START
1584                                 | 1UL << ND_CMD_ARS_STATUS
1585                                 | 1UL << ND_CMD_CLEAR_ERROR,
1586                         .module = THIS_MODULE,
1587                         .provider_name = "ACPI.NFIT",
1588                         .ndctl = acpi_nfit_ctl,
1589                 },
1590                 .dev = &adev->dev,
1591         };
1592
1593         nfit_mem = devm_kzalloc(dev, sizeof(*nfit_mem), GFP_KERNEL);
1594         if (!nfit_mem)
1595                 return -ENOMEM;
1596
1597         mask = 1UL << ND_CMD_SMART | 1UL << ND_CMD_SMART_THRESHOLD
1598                 | 1UL << ND_CMD_DIMM_FLAGS | 1UL << ND_CMD_GET_CONFIG_SIZE
1599                 | 1UL << ND_CMD_GET_CONFIG_DATA | 1UL << ND_CMD_SET_CONFIG_DATA
1600                 | 1UL << ND_CMD_VENDOR;
1601         *nfit_mem = (struct nfit_mem) {
1602                 .adev = adev,
1603                 .family = NVDIMM_FAMILY_INTEL,
1604                 .dsm_mask = mask,
1605         };
1606
1607         nvdimm = devm_kzalloc(dev, sizeof(*nvdimm), GFP_KERNEL);
1608         if (!nvdimm)
1609                 return -ENOMEM;
1610         *nvdimm = (struct nvdimm) {
1611                 .provider_data = nfit_mem,
1612                 .cmd_mask = mask,
1613                 .dev = {
1614                         .init_name = "test-dimm",
1615                 },
1616         };
1617
1618
1619         /* basic checkout of a typical 'get config size' command */
1620         cmd_size = sizeof(cmds.cfg_size);
1621         cmds.cfg_size = (struct nd_cmd_get_config_size) {
1622                 .status = 0,
1623                 .config_size = SZ_128K,
1624                 .max_xfer = SZ_4K,
1625         };
1626         rc = setup_result(cmds.buf, cmd_size);
1627         if (rc)
1628                 return rc;
1629         rc = acpi_nfit_ctl(&acpi_desc->nd_desc, nvdimm, ND_CMD_GET_CONFIG_SIZE,
1630                         cmds.buf, cmd_size, &cmd_rc);
1631
1632         if (rc < 0 || cmd_rc || cmds.cfg_size.status != 0
1633                         || cmds.cfg_size.config_size != SZ_128K
1634                         || cmds.cfg_size.max_xfer != SZ_4K) {
1635                 dev_dbg(dev, "%s: failed at: %d rc: %d cmd_rc: %d\n",
1636                                 __func__, __LINE__, rc, cmd_rc);
1637                 return -EIO;
1638         }
1639
1640
1641         /* test ars_status with zero output */
1642         cmd_size = offsetof(struct nd_cmd_ars_status, address);
1643         cmds.ars_stat = (struct nd_cmd_ars_status) {
1644                 .out_length = 0,
1645         };
1646         rc = setup_result(cmds.buf, cmd_size);
1647         if (rc)
1648                 return rc;
1649         rc = acpi_nfit_ctl(&acpi_desc->nd_desc, NULL, ND_CMD_ARS_STATUS,
1650                         cmds.buf, cmd_size, &cmd_rc);
1651
1652         if (rc < 0 || cmd_rc) {
1653                 dev_dbg(dev, "%s: failed at: %d rc: %d cmd_rc: %d\n",
1654                                 __func__, __LINE__, rc, cmd_rc);
1655                 return -EIO;
1656         }
1657
1658
1659         /* test ars_cap with benign extended status */
1660         cmd_size = sizeof(cmds.ars_cap);
1661         cmds.ars_cap = (struct nd_cmd_ars_cap) {
1662                 .status = ND_ARS_PERSISTENT << 16,
1663         };
1664         offset = offsetof(struct nd_cmd_ars_cap, status);
1665         rc = setup_result(cmds.buf + offset, cmd_size - offset);
1666         if (rc)
1667                 return rc;
1668         rc = acpi_nfit_ctl(&acpi_desc->nd_desc, NULL, ND_CMD_ARS_CAP,
1669                         cmds.buf, cmd_size, &cmd_rc);
1670
1671         if (rc < 0 || cmd_rc) {
1672                 dev_dbg(dev, "%s: failed at: %d rc: %d cmd_rc: %d\n",
1673                                 __func__, __LINE__, rc, cmd_rc);
1674                 return -EIO;
1675         }
1676
1677
1678         /* test ars_status with 'status' trimmed from 'out_length' */
1679         cmd_size = sizeof(cmds.ars_stat) + sizeof(struct nd_ars_record);
1680         cmds.ars_stat = (struct nd_cmd_ars_status) {
1681                 .out_length = cmd_size - 4,
1682         };
1683         record = &cmds.ars_stat.records[0];
1684         *record = (struct nd_ars_record) {
1685                 .length = test_val,
1686         };
1687         rc = setup_result(cmds.buf, cmd_size);
1688         if (rc)
1689                 return rc;
1690         rc = acpi_nfit_ctl(&acpi_desc->nd_desc, NULL, ND_CMD_ARS_STATUS,
1691                         cmds.buf, cmd_size, &cmd_rc);
1692
1693         if (rc < 0 || cmd_rc || record->length != test_val) {
1694                 dev_dbg(dev, "%s: failed at: %d rc: %d cmd_rc: %d\n",
1695                                 __func__, __LINE__, rc, cmd_rc);
1696                 return -EIO;
1697         }
1698
1699
1700         /* test ars_status with 'Output (Size)' including 'status' */
1701         cmd_size = sizeof(cmds.ars_stat) + sizeof(struct nd_ars_record);
1702         cmds.ars_stat = (struct nd_cmd_ars_status) {
1703                 .out_length = cmd_size,
1704         };
1705         record = &cmds.ars_stat.records[0];
1706         *record = (struct nd_ars_record) {
1707                 .length = test_val,
1708         };
1709         rc = setup_result(cmds.buf, cmd_size);
1710         if (rc)
1711                 return rc;
1712         rc = acpi_nfit_ctl(&acpi_desc->nd_desc, NULL, ND_CMD_ARS_STATUS,
1713                         cmds.buf, cmd_size, &cmd_rc);
1714
1715         if (rc < 0 || cmd_rc || record->length != test_val) {
1716                 dev_dbg(dev, "%s: failed at: %d rc: %d cmd_rc: %d\n",
1717                                 __func__, __LINE__, rc, cmd_rc);
1718                 return -EIO;
1719         }
1720
1721
1722         /* test extended status for get_config_size results in failure */
1723         cmd_size = sizeof(cmds.cfg_size);
1724         cmds.cfg_size = (struct nd_cmd_get_config_size) {
1725                 .status = 1 << 16,
1726         };
1727         rc = setup_result(cmds.buf, cmd_size);
1728         if (rc)
1729                 return rc;
1730         rc = acpi_nfit_ctl(&acpi_desc->nd_desc, nvdimm, ND_CMD_GET_CONFIG_SIZE,
1731                         cmds.buf, cmd_size, &cmd_rc);
1732
1733         if (rc < 0 || cmd_rc >= 0) {
1734                 dev_dbg(dev, "%s: failed at: %d rc: %d cmd_rc: %d\n",
1735                                 __func__, __LINE__, rc, cmd_rc);
1736                 return -EIO;
1737         }
1738
1739         return 0;
1740 }
1741
1742 static int nfit_test_probe(struct platform_device *pdev)
1743 {
1744         struct nvdimm_bus_descriptor *nd_desc;
1745         struct acpi_nfit_desc *acpi_desc;
1746         struct device *dev = &pdev->dev;
1747         struct nfit_test *nfit_test;
1748         struct nfit_mem *nfit_mem;
1749         union acpi_object *obj;
1750         int rc;
1751
1752         if (strcmp(dev_name(&pdev->dev), "nfit_test.0") == 0) {
1753                 rc = nfit_ctl_test(&pdev->dev);
1754                 if (rc)
1755                         return rc;
1756         }
1757
1758         nfit_test = to_nfit_test(&pdev->dev);
1759
1760         /* common alloc */
1761         if (nfit_test->num_dcr) {
1762                 int num = nfit_test->num_dcr;
1763
1764                 nfit_test->dimm = devm_kcalloc(dev, num, sizeof(void *),
1765                                 GFP_KERNEL);
1766                 nfit_test->dimm_dma = devm_kcalloc(dev, num, sizeof(dma_addr_t),
1767                                 GFP_KERNEL);
1768                 nfit_test->flush = devm_kcalloc(dev, num, sizeof(void *),
1769                                 GFP_KERNEL);
1770                 nfit_test->flush_dma = devm_kcalloc(dev, num, sizeof(dma_addr_t),
1771                                 GFP_KERNEL);
1772                 nfit_test->label = devm_kcalloc(dev, num, sizeof(void *),
1773                                 GFP_KERNEL);
1774                 nfit_test->label_dma = devm_kcalloc(dev, num,
1775                                 sizeof(dma_addr_t), GFP_KERNEL);
1776                 nfit_test->dcr = devm_kcalloc(dev, num,
1777                                 sizeof(struct nfit_test_dcr *), GFP_KERNEL);
1778                 nfit_test->dcr_dma = devm_kcalloc(dev, num,
1779                                 sizeof(dma_addr_t), GFP_KERNEL);
1780                 if (nfit_test->dimm && nfit_test->dimm_dma && nfit_test->label
1781                                 && nfit_test->label_dma && nfit_test->dcr
1782                                 && nfit_test->dcr_dma && nfit_test->flush
1783                                 && nfit_test->flush_dma)
1784                         /* pass */;
1785                 else
1786                         return -ENOMEM;
1787         }
1788
1789         if (nfit_test->num_pm) {
1790                 int num = nfit_test->num_pm;
1791
1792                 nfit_test->spa_set = devm_kcalloc(dev, num, sizeof(void *),
1793                                 GFP_KERNEL);
1794                 nfit_test->spa_set_dma = devm_kcalloc(dev, num,
1795                                 sizeof(dma_addr_t), GFP_KERNEL);
1796                 if (nfit_test->spa_set && nfit_test->spa_set_dma)
1797                         /* pass */;
1798                 else
1799                         return -ENOMEM;
1800         }
1801
1802         /* per-nfit specific alloc */
1803         if (nfit_test->alloc(nfit_test))
1804                 return -ENOMEM;
1805
1806         nfit_test->setup(nfit_test);
1807         acpi_desc = &nfit_test->acpi_desc;
1808         acpi_nfit_desc_init(acpi_desc, &pdev->dev);
1809         acpi_desc->blk_do_io = nfit_test_blk_do_io;
1810         nd_desc = &acpi_desc->nd_desc;
1811         nd_desc->provider_name = NULL;
1812         nd_desc->module = THIS_MODULE;
1813         nd_desc->ndctl = nfit_test_ctl;
1814
1815         rc = acpi_nfit_init(acpi_desc, nfit_test->nfit_buf,
1816                         nfit_test->nfit_size);
1817         if (rc)
1818                 return rc;
1819
1820         if (nfit_test->setup != nfit_test0_setup)
1821                 return 0;
1822
1823         nfit_test->setup_hotplug = 1;
1824         nfit_test->setup(nfit_test);
1825
1826         obj = kzalloc(sizeof(*obj), GFP_KERNEL);
1827         if (!obj)
1828                 return -ENOMEM;
1829         obj->type = ACPI_TYPE_BUFFER;
1830         obj->buffer.length = nfit_test->nfit_size;
1831         obj->buffer.pointer = nfit_test->nfit_buf;
1832         *(nfit_test->_fit) = obj;
1833         __acpi_nfit_notify(&pdev->dev, nfit_test, 0x80);
1834
1835         /* associate dimm devices with nfit_mem data for notification testing */
1836         mutex_lock(&acpi_desc->init_mutex);
1837         list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
1838                 u32 nfit_handle = __to_nfit_memdev(nfit_mem)->device_handle;
1839                 int i;
1840
1841                 for (i = 0; i < NUM_DCR; i++)
1842                         if (nfit_handle == handle[i])
1843                                 dev_set_drvdata(nfit_test->dimm_dev[i],
1844                                                 nfit_mem);
1845         }
1846         mutex_unlock(&acpi_desc->init_mutex);
1847
1848         return 0;
1849 }
1850
1851 static int nfit_test_remove(struct platform_device *pdev)
1852 {
1853         return 0;
1854 }
1855
1856 static void nfit_test_release(struct device *dev)
1857 {
1858         struct nfit_test *nfit_test = to_nfit_test(dev);
1859
1860         kfree(nfit_test);
1861 }
1862
1863 static const struct platform_device_id nfit_test_id[] = {
1864         { KBUILD_MODNAME },
1865         { },
1866 };
1867
1868 static struct platform_driver nfit_test_driver = {
1869         .probe = nfit_test_probe,
1870         .remove = nfit_test_remove,
1871         .driver = {
1872                 .name = KBUILD_MODNAME,
1873         },
1874         .id_table = nfit_test_id,
1875 };
1876
1877 static __init int nfit_test_init(void)
1878 {
1879         int rc, i;
1880
1881         nfit_test_setup(nfit_test_lookup, nfit_test_evaluate_dsm);
1882
1883         nfit_test_dimm = class_create(THIS_MODULE, "nfit_test_dimm");
1884         if (IS_ERR(nfit_test_dimm)) {
1885                 rc = PTR_ERR(nfit_test_dimm);
1886                 goto err_register;
1887         }
1888
1889         for (i = 0; i < NUM_NFITS; i++) {
1890                 struct nfit_test *nfit_test;
1891                 struct platform_device *pdev;
1892
1893                 nfit_test = kzalloc(sizeof(*nfit_test), GFP_KERNEL);
1894                 if (!nfit_test) {
1895                         rc = -ENOMEM;
1896                         goto err_register;
1897                 }
1898                 INIT_LIST_HEAD(&nfit_test->resources);
1899                 switch (i) {
1900                 case 0:
1901                         nfit_test->num_pm = NUM_PM;
1902                         nfit_test->dcr_idx = 0;
1903                         nfit_test->num_dcr = NUM_DCR;
1904                         nfit_test->alloc = nfit_test0_alloc;
1905                         nfit_test->setup = nfit_test0_setup;
1906                         break;
1907                 case 1:
1908                         nfit_test->num_pm = 1;
1909                         nfit_test->dcr_idx = NUM_DCR;
1910                         nfit_test->num_dcr = 1;
1911                         nfit_test->alloc = nfit_test1_alloc;
1912                         nfit_test->setup = nfit_test1_setup;
1913                         break;
1914                 default:
1915                         rc = -EINVAL;
1916                         goto err_register;
1917                 }
1918                 pdev = &nfit_test->pdev;
1919                 pdev->name = KBUILD_MODNAME;
1920                 pdev->id = i;
1921                 pdev->dev.release = nfit_test_release;
1922                 rc = platform_device_register(pdev);
1923                 if (rc) {
1924                         put_device(&pdev->dev);
1925                         goto err_register;
1926                 }
1927
1928                 rc = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
1929                 if (rc)
1930                         goto err_register;
1931
1932                 instances[i] = nfit_test;
1933         }
1934
1935         rc = platform_driver_register(&nfit_test_driver);
1936         if (rc)
1937                 goto err_register;
1938         return 0;
1939
1940  err_register:
1941         for (i = 0; i < NUM_NFITS; i++)
1942                 if (instances[i])
1943                         platform_device_unregister(&instances[i]->pdev);
1944         nfit_test_teardown();
1945         return rc;
1946 }
1947
1948 static __exit void nfit_test_exit(void)
1949 {
1950         int i;
1951
1952         platform_driver_unregister(&nfit_test_driver);
1953         for (i = 0; i < NUM_NFITS; i++)
1954                 platform_device_unregister(&instances[i]->pdev);
1955         nfit_test_teardown();
1956         class_destroy(nfit_test_dimm);
1957 }
1958
1959 module_init(nfit_test_init);
1960 module_exit(nfit_test_exit);
1961 MODULE_LICENSE("GPL v2");
1962 MODULE_AUTHOR("Intel Corporation");