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         [6] = NFIT_DIMM_HANDLE(1, 0, 0, 0, 1),
 136 };
 137
 138 static unsigned long dimm_fail_cmd_flags[NUM_DCR];
 139
 140 struct nfit_test {
 141         struct acpi_nfit_desc acpi_desc;
 142         struct platform_device pdev;
 143         struct list_head resources;
 144         void *nfit_buf;
 145         dma_addr_t nfit_dma;
 146         size_t nfit_size;
 147         int dcr_idx;
 148         int num_dcr;
 149         int num_pm;
 150         void **dimm;
 151         dma_addr_t *dimm_dma;
 152         void **flush;
 153         dma_addr_t *flush_dma;
 154         void **label;
 155         dma_addr_t *label_dma;
 156         void **spa_set;
 157         dma_addr_t *spa_set_dma;
 158         struct nfit_test_dcr **dcr;
 159         dma_addr_t *dcr_dma;
 160         int (*alloc)(struct nfit_test *t);
 161         void (*setup)(struct nfit_test *t);
 162         int setup_hotplug;
 163         union acpi_object **_fit;
 164         dma_addr_t _fit_dma;
 165         struct ars_state {
 166                 struct nd_cmd_ars_status *ars_status;
 167                 unsigned long deadline;
 168                 spinlock_t lock;
 169         } ars_state;
 170         struct device *dimm_dev[NUM_DCR];
 171 };
 172
 173 static struct nfit_test *to_nfit_test(struct device *dev)
 174 {
 175         struct platform_device *pdev = to_platform_device(dev);
 176
 177         return container_of(pdev, struct nfit_test, pdev);
 178 }
 179
 180 static int nfit_test_cmd_get_config_size(struct nd_cmd_get_config_size *nd_cmd,
 181                 unsigned int buf_len)
 182 {
 183         if (buf_len < sizeof(*nd_cmd))
 184                 return -EINVAL;
 185
 186         nd_cmd->status = 0;
 187         nd_cmd->config_size = LABEL_SIZE;
 188         nd_cmd->max_xfer = SZ_4K;
 189
 190         return 0;
 191 }
 192
 193 static int nfit_test_cmd_get_config_data(struct nd_cmd_get_config_data_hdr
 194                 *nd_cmd, unsigned int buf_len, void *label)
 195 {
 196         unsigned int len, offset = nd_cmd->in_offset;
 197         int rc;
 198
 199         if (buf_len < sizeof(*nd_cmd))
 200                 return -EINVAL;
 201         if (offset >= LABEL_SIZE)
 202                 return -EINVAL;
 203         if (nd_cmd->in_length + sizeof(*nd_cmd) > buf_len)
 204                 return -EINVAL;
 205
 206         nd_cmd->status = 0;
 207         len = min(nd_cmd->in_length, LABEL_SIZE - offset);
 208         memcpy(nd_cmd->out_buf, label + offset, len);
 209         rc = buf_len - sizeof(*nd_cmd) - len;
 210
 211         return rc;
 212 }
 213
 214 static int nfit_test_cmd_set_config_data(struct nd_cmd_set_config_hdr *nd_cmd,
 215                 unsigned int buf_len, void *label)
 216 {
 217         unsigned int len, offset = nd_cmd->in_offset;
 218         u32 *status;
 219         int rc;
 220
 221         if (buf_len < sizeof(*nd_cmd))
 222                 return -EINVAL;
 223         if (offset >= LABEL_SIZE)
 224                 return -EINVAL;
 225         if (nd_cmd->in_length + sizeof(*nd_cmd) + 4 > buf_len)
 226                 return -EINVAL;
 227
 228         status = (void *)nd_cmd + nd_cmd->in_length + sizeof(*nd_cmd);
 229         *status = 0;
 230         len = min(nd_cmd->in_length, LABEL_SIZE - offset);
 231         memcpy(label + offset, nd_cmd->in_buf, len);
 232         rc = buf_len - sizeof(*nd_cmd) - (len + 4);
 233
 234         return rc;
 235 }
 236
 237 #define NFIT_TEST_ARS_RECORDS 4
 238 #define NFIT_TEST_CLEAR_ERR_UNIT 256
 239
 240 static int nfit_test_cmd_ars_cap(struct nd_cmd_ars_cap *nd_cmd,
 241                 unsigned int buf_len)
 242 {
 243         if (buf_len < sizeof(*nd_cmd))
 244                 return -EINVAL;
 245
 246         nd_cmd->max_ars_out = sizeof(struct nd_cmd_ars_status)
 247                 + NFIT_TEST_ARS_RECORDS * sizeof(struct nd_ars_record);
 248         nd_cmd->status = (ND_ARS_PERSISTENT | ND_ARS_VOLATILE) << 16;
 249         nd_cmd->clear_err_unit = NFIT_TEST_CLEAR_ERR_UNIT;
 250
 251         return 0;
 252 }
 253
 254 /*
 255  * Initialize the ars_state to return an ars_result 1 second in the future with
 256  * a 4K error range in the middle of the requested address range.
 257  */
 258 static void post_ars_status(struct ars_state *ars_state, u64 addr, u64 len)
 259 {
 260         struct nd_cmd_ars_status *ars_status;
 261         struct nd_ars_record *ars_record;
 262
 263         ars_state->deadline = jiffies + 1*HZ;
 264         ars_status = ars_state->ars_status;
 265         ars_status->status = 0;
 266         ars_status->out_length = sizeof(struct nd_cmd_ars_status)
 267                 + sizeof(struct nd_ars_record);
 268         ars_status->address = addr;
 269         ars_status->length = len;
 270         ars_status->type = ND_ARS_PERSISTENT;
 271         ars_status->num_records = 1;
 272         ars_record = &ars_status->records[0];
 273         ars_record->handle = 0;
 274         ars_record->err_address = addr + len / 2;
 275         ars_record->length = SZ_4K;
 276 }
 277
 278 static int nfit_test_cmd_ars_start(struct ars_state *ars_state,
 279                 struct nd_cmd_ars_start *ars_start, unsigned int buf_len,
 280                 int *cmd_rc)
 281 {
 282         if (buf_len < sizeof(*ars_start))
 283                 return -EINVAL;
 284
 285         spin_lock(&ars_state->lock);
 286         if (time_before(jiffies, ars_state->deadline)) {
 287                 ars_start->status = NFIT_ARS_START_BUSY;
 288                 *cmd_rc = -EBUSY;
 289         } else {
 290                 ars_start->status = 0;
 291                 ars_start->scrub_time = 1;
 292                 post_ars_status(ars_state, ars_start->address,
 293                                 ars_start->length);
 294                 *cmd_rc = 0;
 295         }
 296         spin_unlock(&ars_state->lock);
 297
 298         return 0;
 299 }
 300
 301 static int nfit_test_cmd_ars_status(struct ars_state *ars_state,
 302                 struct nd_cmd_ars_status *ars_status, unsigned int buf_len,
 303                 int *cmd_rc)
 304 {
 305         if (buf_len < ars_state->ars_status->out_length)
 306                 return -EINVAL;
 307
 308         spin_lock(&ars_state->lock);
 309         if (time_before(jiffies, ars_state->deadline)) {
 310                 memset(ars_status, 0, buf_len);
 311                 ars_status->status = NFIT_ARS_STATUS_BUSY;
 312                 ars_status->out_length = sizeof(*ars_status);
 313                 *cmd_rc = -EBUSY;
 314         } else {
 315                 memcpy(ars_status, ars_state->ars_status,
 316                                 ars_state->ars_status->out_length);
 317                 *cmd_rc = 0;
 318         }
 319         spin_unlock(&ars_state->lock);
 320         return 0;
 321 }
 322
 323 static int nfit_test_cmd_clear_error(struct nd_cmd_clear_error *clear_err,
 324                 unsigned int buf_len, int *cmd_rc)
 325 {
 326         const u64 mask = NFIT_TEST_CLEAR_ERR_UNIT - 1;
 327         if (buf_len < sizeof(*clear_err))
 328                 return -EINVAL;
 329
 330         if ((clear_err->address & mask) || (clear_err->length & mask))
 331                 return -EINVAL;
 332
 333         /*
 334          * Report 'all clear' success for all commands even though a new
 335          * scrub will find errors again.  This is enough to have the
 336          * error removed from the 'badblocks' tracking in the pmem
 337          * driver.
 338          */
 339         clear_err->status = 0;
 340         clear_err->cleared = clear_err->length;
 341         *cmd_rc = 0;
 342         return 0;
 343 }
 344
 345 static int nfit_test_cmd_smart(struct nd_cmd_smart *smart, unsigned int buf_len)
 346 {
 347         static const struct nd_smart_payload smart_data = {
 348                 .flags = ND_SMART_HEALTH_VALID | ND_SMART_TEMP_VALID
 349                         | ND_SMART_SPARES_VALID | ND_SMART_ALARM_VALID
 350                         | ND_SMART_USED_VALID | ND_SMART_SHUTDOWN_VALID,
 351                 .health = ND_SMART_NON_CRITICAL_HEALTH,
 352                 .temperature = 23 * 16,
 353                 .spares = 75,
 354                 .alarm_flags = ND_SMART_SPARE_TRIP | ND_SMART_TEMP_TRIP,
 355                 .life_used = 5,
 356                 .shutdown_state = 0,
 357                 .vendor_size = 0,
 358         };
 359
 360         if (buf_len < sizeof(*smart))
 361                 return -EINVAL;
 362         memcpy(smart->data, &smart_data, sizeof(smart_data));
 363         return 0;
 364 }
 365
 366 static int nfit_test_cmd_smart_threshold(struct nd_cmd_smart_threshold *smart_t,
 367                 unsigned int buf_len)
 368 {
 369         static const struct nd_smart_threshold_payload smart_t_data = {
 370                 .alarm_control = ND_SMART_SPARE_TRIP | ND_SMART_TEMP_TRIP,
 371                 .temperature = 40 * 16,
 372                 .spares = 5,
 373         };
 374
 375         if (buf_len < sizeof(*smart_t))
 376                 return -EINVAL;
 377         memcpy(smart_t->data, &smart_t_data, sizeof(smart_t_data));
 378         return 0;
 379 }
 380
 381 static int nfit_test_ctl(struct nvdimm_bus_descriptor *nd_desc,
 382                 struct nvdimm *nvdimm, unsigned int cmd, void *buf,
 383                 unsigned int buf_len, int *cmd_rc)
 384 {
 385         struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
 386         struct nfit_test *t = container_of(acpi_desc, typeof(*t), acpi_desc);
 387         unsigned int func = cmd;
 388         int i, rc = 0, __cmd_rc;
 389
 390         if (!cmd_rc)
 391                 cmd_rc = &__cmd_rc;
 392         *cmd_rc = 0;
 393
 394         if (nvdimm) {
 395                 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
 396                 unsigned long cmd_mask = nvdimm_cmd_mask(nvdimm);
 397
 398                 if (!nfit_mem)
 399                         return -ENOTTY;
 400
 401                 if (cmd == ND_CMD_CALL) {
 402                         struct nd_cmd_pkg *call_pkg = buf;
 403
 404                         buf_len = call_pkg->nd_size_in + call_pkg->nd_size_out;
 405                         buf = (void *) call_pkg->nd_payload;
 406                         func = call_pkg->nd_command;
 407                         if (call_pkg->nd_family != nfit_mem->family)
 408                                 return -ENOTTY;
 409                 }
 410
 411                 if (!test_bit(cmd, &cmd_mask)
 412                                 || !test_bit(func, &nfit_mem->dsm_mask))
 413                         return -ENOTTY;
 414
 415                 /* lookup label space for the given dimm */
 416                 for (i = 0; i < ARRAY_SIZE(handle); i++)
 417                         if (__to_nfit_memdev(nfit_mem)->device_handle ==
 418                                         handle[i])
 419                                 break;
 420                 if (i >= ARRAY_SIZE(handle))
 421                         return -ENXIO;
 422
 423                 if ((1 << func) & dimm_fail_cmd_flags[i])
 424                         return -EIO;
 425
 426                 switch (func) {
 427                 case ND_CMD_GET_CONFIG_SIZE:
 428                         rc = nfit_test_cmd_get_config_size(buf, buf_len);
 429                         break;
 430                 case ND_CMD_GET_CONFIG_DATA:
 431                         rc = nfit_test_cmd_get_config_data(buf, buf_len,
 432                                 t->label[i - t->dcr_idx]);
 433                         break;
 434                 case ND_CMD_SET_CONFIG_DATA:
 435                         rc = nfit_test_cmd_set_config_data(buf, buf_len,
 436                                 t->label[i - t->dcr_idx]);
 437                         break;
 438                 case ND_CMD_SMART:
 439                         rc = nfit_test_cmd_smart(buf, buf_len);
 440                         break;
 441                 case ND_CMD_SMART_THRESHOLD:
 442                         rc = nfit_test_cmd_smart_threshold(buf, buf_len);
 443                         device_lock(&t->pdev.dev);
 444                         __acpi_nvdimm_notify(t->dimm_dev[i], 0x81);
 445                         device_unlock(&t->pdev.dev);
 446                         break;
 447                 default:
 448                         return -ENOTTY;
 449                 }
 450         } else {
 451                 struct ars_state *ars_state = &t->ars_state;
 452
 453                 if (!nd_desc || !test_bit(cmd, &nd_desc->cmd_mask))
 454                         return -ENOTTY;
 455
 456                 switch (func) {
 457                 case ND_CMD_ARS_CAP:
 458                         rc = nfit_test_cmd_ars_cap(buf, buf_len);
 459                         break;
 460                 case ND_CMD_ARS_START:
 461                         rc = nfit_test_cmd_ars_start(ars_state, buf, buf_len,
 462                                         cmd_rc);
 463                         break;
 464                 case ND_CMD_ARS_STATUS:
 465                         rc = nfit_test_cmd_ars_status(ars_state, buf, buf_len,
 466                                         cmd_rc);
 467                         break;
 468                 case ND_CMD_CLEAR_ERROR:
 469                         rc = nfit_test_cmd_clear_error(buf, buf_len, cmd_rc);
 470                         break;
 471                 default:
 472                         return -ENOTTY;
 473                 }
 474         }
 475
 476         return rc;
 477 }
 478
 479 static DEFINE_SPINLOCK(nfit_test_lock);
 480 static struct nfit_test *instances[NUM_NFITS];
 481
 482 static void release_nfit_res(void *data)
 483 {
 484         struct nfit_test_resource *nfit_res = data;
 485
 486         spin_lock(&nfit_test_lock);
 487         list_del(&nfit_res->list);
 488         spin_unlock(&nfit_test_lock);
 489
 490         vfree(nfit_res->buf);
 491         kfree(nfit_res);
 492 }
 493
 494 static void *__test_alloc(struct nfit_test *t, size_t size, dma_addr_t *dma,
 495                 void *buf)
 496 {
 497         struct device *dev = &t->pdev.dev;
 498         struct nfit_test_resource *nfit_res = kzalloc(sizeof(*nfit_res),
 499                         GFP_KERNEL);
 500         int rc;
 501
 502         if (!buf || !nfit_res)
 503                 goto err;
 504         rc = devm_add_action(dev, release_nfit_res, nfit_res);
 505         if (rc)
 506                 goto err;
 507         INIT_LIST_HEAD(&nfit_res->list);
 508         memset(buf, 0, size);
 509         nfit_res->dev = dev;
 510         nfit_res->buf = buf;
 511         nfit_res->res.start = *dma;
 512         nfit_res->res.end = *dma + size - 1;
 513         nfit_res->res.name = "NFIT";
 514         spin_lock_init(&nfit_res->lock);
 515         INIT_LIST_HEAD(&nfit_res->requests);
 516         spin_lock(&nfit_test_lock);
 517         list_add(&nfit_res->list, &t->resources);
 518         spin_unlock(&nfit_test_lock);
 519
 520         return nfit_res->buf;
 521  err:
 522         if (buf)
 523                 vfree(buf);
 524         kfree(nfit_res);
 525         return NULL;
 526 }
 527
 528 static void *test_alloc(struct nfit_test *t, size_t size, dma_addr_t *dma)
 529 {
 530         void *buf = vmalloc(size);
 531
 532         *dma = (unsigned long) buf;
 533         return __test_alloc(t, size, dma, buf);
 534 }
 535
 536 static struct nfit_test_resource *nfit_test_lookup(resource_size_t addr)
 537 {
 538         int i;
 539
 540         for (i = 0; i < ARRAY_SIZE(instances); i++) {
 541                 struct nfit_test_resource *n, *nfit_res = NULL;
 542                 struct nfit_test *t = instances[i];
 543
 544                 if (!t)
 545                         continue;
 546                 spin_lock(&nfit_test_lock);
 547                 list_for_each_entry(n, &t->resources, list) {
 548                         if (addr >= n->res.start && (addr < n->res.start
 549                                                 + resource_size(&n->res))) {
 550                                 nfit_res = n;
 551                                 break;
 552                         } else if (addr >= (unsigned long) n->buf
 553                                         && (addr < (unsigned long) n->buf
 554                                                 + resource_size(&n->res))) {
 555                                 nfit_res = n;
 556                                 break;
 557                         }
 558                 }
 559                 spin_unlock(&nfit_test_lock);
 560                 if (nfit_res)
 561                         return nfit_res;
 562         }
 563
 564         return NULL;
 565 }
 566
 567 static int ars_state_init(struct device *dev, struct ars_state *ars_state)
 568 {
 569         ars_state->ars_status = devm_kzalloc(dev,
 570                         sizeof(struct nd_cmd_ars_status)
 571                         + sizeof(struct nd_ars_record) * NFIT_TEST_ARS_RECORDS,
 572                         GFP_KERNEL);
 573         if (!ars_state->ars_status)
 574                 return -ENOMEM;
 575         spin_lock_init(&ars_state->lock);
 576         return 0;
 577 }
 578
 579 static void put_dimms(void *data)
 580 {
 581         struct device **dimm_dev = data;
 582         int i;
 583
 584         for (i = 0; i < NUM_DCR; i++)
 585                 if (dimm_dev[i])
 586                         device_unregister(dimm_dev[i]);
 587 }
 588
 589 static struct class *nfit_test_dimm;
 590
 591 static int dimm_name_to_id(struct device *dev)
 592 {
 593         int dimm;
 594
 595         if (sscanf(dev_name(dev), "test_dimm%d", &dimm) != 1
 596                         || dimm >= NUM_DCR || dimm < 0)
 597                 return -ENXIO;
 598         return dimm;
 599 }
 600
 601
 602 static ssize_t handle_show(struct device *dev, struct device_attribute *attr,
 603                 char *buf)
 604 {
 605         int dimm = dimm_name_to_id(dev);
 606
 607         if (dimm < 0)
 608                 return dimm;
 609
 610         return sprintf(buf, "%#x", handle[dimm]);
 611 }
 612 DEVICE_ATTR_RO(handle);
 613
 614 static ssize_t fail_cmd_show(struct device *dev, struct device_attribute *attr,
 615                 char *buf)
 616 {
 617         int dimm = dimm_name_to_id(dev);
 618
 619         if (dimm < 0)
 620                 return dimm;
 621
 622         return sprintf(buf, "%#lx\n", dimm_fail_cmd_flags[dimm]);
 623 }
 624
 625 static ssize_t fail_cmd_store(struct device *dev, struct device_attribute *attr,
 626                 const char *buf, size_t size)
 627 {
 628         int dimm = dimm_name_to_id(dev);
 629         unsigned long val;
 630         ssize_t rc;
 631
 632         if (dimm < 0)
 633                 return dimm;
 634
 635         rc = kstrtol(buf, 0, &val);
 636         if (rc)
 637                 return rc;
 638
 639         dimm_fail_cmd_flags[dimm] = val;
 640         return size;
 641 }
 642 static DEVICE_ATTR_RW(fail_cmd);
 643
 644 static struct attribute *nfit_test_dimm_attributes[] = {
 645         &dev_attr_fail_cmd.attr,
 646         &dev_attr_handle.attr,
 647         NULL,
 648 };
 649
 650 static struct attribute_group nfit_test_dimm_attribute_group = {
 651         .attrs = nfit_test_dimm_attributes,
 652 };
 653
 654 static const struct attribute_group *nfit_test_dimm_attribute_groups[] = {
 655         &nfit_test_dimm_attribute_group,
 656         NULL,
 657 };
 658
 659 static int nfit_test0_alloc(struct nfit_test *t)
 660 {
 661         size_t nfit_size = sizeof(struct acpi_nfit_system_address) * NUM_SPA
 662                         + sizeof(struct acpi_nfit_memory_map) * NUM_MEM
 663                         + sizeof(struct acpi_nfit_control_region) * NUM_DCR
 664                         + offsetof(struct acpi_nfit_control_region,
 665                                         window_size) * NUM_DCR
 666                         + sizeof(struct acpi_nfit_data_region) * NUM_BDW
 667                         + (sizeof(struct acpi_nfit_flush_address)
 668                                         + sizeof(u64) * NUM_HINTS) * NUM_DCR;
 669         int i;
 670
 671         t->nfit_buf = test_alloc(t, nfit_size, &t->nfit_dma);
 672         if (!t->nfit_buf)
 673                 return -ENOMEM;
 674         t->nfit_size = nfit_size;
 675
 676         t->spa_set[0] = test_alloc(t, SPA0_SIZE, &t->spa_set_dma[0]);
 677         if (!t->spa_set[0])
 678                 return -ENOMEM;
 679
 680         t->spa_set[1] = test_alloc(t, SPA1_SIZE, &t->spa_set_dma[1]);
 681         if (!t->spa_set[1])
 682                 return -ENOMEM;
 683
 684         t->spa_set[2] = test_alloc(t, SPA0_SIZE, &t->spa_set_dma[2]);
 685         if (!t->spa_set[2])
 686                 return -ENOMEM;
 687
 688         for (i = 0; i < t->num_dcr; i++) {
 689                 t->dimm[i] = test_alloc(t, DIMM_SIZE, &t->dimm_dma[i]);
 690                 if (!t->dimm[i])
 691                         return -ENOMEM;
 692
 693                 t->label[i] = test_alloc(t, LABEL_SIZE, &t->label_dma[i]);
 694                 if (!t->label[i])
 695                         return -ENOMEM;
 696                 sprintf(t->label[i], "label%d", i);
 697
 698                 t->flush[i] = test_alloc(t, max(PAGE_SIZE,
 699                                         sizeof(u64) * NUM_HINTS),
 700                                 &t->flush_dma[i]);
 701                 if (!t->flush[i])
 702                         return -ENOMEM;
 703         }
 704
 705         for (i = 0; i < t->num_dcr; i++) {
 706                 t->dcr[i] = test_alloc(t, LABEL_SIZE, &t->dcr_dma[i]);
 707                 if (!t->dcr[i])
 708                         return -ENOMEM;
 709         }
 710
 711         t->_fit = test_alloc(t, sizeof(union acpi_object **), &t->_fit_dma);
 712         if (!t->_fit)
 713                 return -ENOMEM;
 714
 715         if (devm_add_action_or_reset(&t->pdev.dev, put_dimms, t->dimm_dev))
 716                 return -ENOMEM;
 717         for (i = 0; i < NUM_DCR; i++) {
 718                 t->dimm_dev[i] = device_create_with_groups(nfit_test_dimm,
 719                                 &t->pdev.dev, 0, NULL,
 720                                 nfit_test_dimm_attribute_groups,
 721                                 "test_dimm%d", i);
 722                 if (!t->dimm_dev[i])
 723                         return -ENOMEM;
 724         }
 725
 726         return ars_state_init(&t->pdev.dev, &t->ars_state);
 727 }
 728
 729 static int nfit_test1_alloc(struct nfit_test *t)
 730 {
 731         size_t nfit_size = sizeof(struct acpi_nfit_system_address) * 2
 732                 + sizeof(struct acpi_nfit_memory_map) * 2
 733                 + offsetof(struct acpi_nfit_control_region, window_size) * 2;
 734         int i;
 735
 736         t->nfit_buf = test_alloc(t, nfit_size, &t->nfit_dma);
 737         if (!t->nfit_buf)
 738                 return -ENOMEM;
 739         t->nfit_size = nfit_size;
 740
 741         t->spa_set[0] = test_alloc(t, SPA2_SIZE, &t->spa_set_dma[0]);
 742         if (!t->spa_set[0])
 743                 return -ENOMEM;
 744
 745         for (i = 0; i < t->num_dcr; i++) {
 746                 t->label[i] = test_alloc(t, LABEL_SIZE, &t->label_dma[i]);
 747                 if (!t->label[i])
 748                         return -ENOMEM;
 749                 sprintf(t->label[i], "label%d", i);
 750         }
 751
 752         t->spa_set[1] = test_alloc(t, SPA_VCD_SIZE, &t->spa_set_dma[1]);
 753         if (!t->spa_set[1])
 754                 return -ENOMEM;
 755
 756         return ars_state_init(&t->pdev.dev, &t->ars_state);
 757 }
 758
 759 static void dcr_common_init(struct acpi_nfit_control_region *dcr)
 760 {
 761         dcr->vendor_id = 0xabcd;
 762         dcr->device_id = 0;
 763         dcr->revision_id = 1;
 764         dcr->valid_fields = 1;
 765         dcr->manufacturing_location = 0xa;
 766         dcr->manufacturing_date = cpu_to_be16(2016);
 767 }
 768
 769 static void nfit_test0_setup(struct nfit_test *t)
 770 {
 771         const int flush_hint_size = sizeof(struct acpi_nfit_flush_address)
 772                 + (sizeof(u64) * NUM_HINTS);
 773         struct acpi_nfit_desc *acpi_desc;
 774         struct acpi_nfit_memory_map *memdev;
 775         void *nfit_buf = t->nfit_buf;
 776         struct acpi_nfit_system_address *spa;
 777         struct acpi_nfit_control_region *dcr;
 778         struct acpi_nfit_data_region *bdw;
 779         struct acpi_nfit_flush_address *flush;
 780         unsigned int offset, i;
 781
 782         /*
 783          * spa0 (interleave first half of dimm0 and dimm1, note storage
 784          * does not actually alias the related block-data-window
 785          * regions)
 786          */
 787         spa = nfit_buf;
 788         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 789         spa->header.length = sizeof(*spa);
 790         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16);
 791         spa->range_index = 0+1;
 792         spa->address = t->spa_set_dma[0];
 793         spa->length = SPA0_SIZE;
 794
 795         /*
 796          * spa1 (interleave last half of the 4 DIMMS, note storage
 797          * does not actually alias the related block-data-window
 798          * regions)
 799          */
 800         spa = nfit_buf + sizeof(*spa);
 801         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 802         spa->header.length = sizeof(*spa);
 803         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16);
 804         spa->range_index = 1+1;
 805         spa->address = t->spa_set_dma[1];
 806         spa->length = SPA1_SIZE;
 807
 808         /* spa2 (dcr0) dimm0 */
 809         spa = nfit_buf + sizeof(*spa) * 2;
 810         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 811         spa->header.length = sizeof(*spa);
 812         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
 813         spa->range_index = 2+1;
 814         spa->address = t->dcr_dma[0];
 815         spa->length = DCR_SIZE;
 816
 817         /* spa3 (dcr1) dimm1 */
 818         spa = nfit_buf + sizeof(*spa) * 3;
 819         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 820         spa->header.length = sizeof(*spa);
 821         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
 822         spa->range_index = 3+1;
 823         spa->address = t->dcr_dma[1];
 824         spa->length = DCR_SIZE;
 825
 826         /* spa4 (dcr2) dimm2 */
 827         spa = nfit_buf + sizeof(*spa) * 4;
 828         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 829         spa->header.length = sizeof(*spa);
 830         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
 831         spa->range_index = 4+1;
 832         spa->address = t->dcr_dma[2];
 833         spa->length = DCR_SIZE;
 834
 835         /* spa5 (dcr3) dimm3 */
 836         spa = nfit_buf + sizeof(*spa) * 5;
 837         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 838         spa->header.length = sizeof(*spa);
 839         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
 840         spa->range_index = 5+1;
 841         spa->address = t->dcr_dma[3];
 842         spa->length = DCR_SIZE;
 843
 844         /* spa6 (bdw for dcr0) dimm0 */
 845         spa = nfit_buf + sizeof(*spa) * 6;
 846         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 847         spa->header.length = sizeof(*spa);
 848         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
 849         spa->range_index = 6+1;
 850         spa->address = t->dimm_dma[0];
 851         spa->length = DIMM_SIZE;
 852
 853         /* spa7 (bdw for dcr1) dimm1 */
 854         spa = nfit_buf + sizeof(*spa) * 7;
 855         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 856         spa->header.length = sizeof(*spa);
 857         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
 858         spa->range_index = 7+1;
 859         spa->address = t->dimm_dma[1];
 860         spa->length = DIMM_SIZE;
 861
 862         /* spa8 (bdw for dcr2) dimm2 */
 863         spa = nfit_buf + sizeof(*spa) * 8;
 864         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 865         spa->header.length = sizeof(*spa);
 866         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
 867         spa->range_index = 8+1;
 868         spa->address = t->dimm_dma[2];
 869         spa->length = DIMM_SIZE;
 870
 871         /* spa9 (bdw for dcr3) dimm3 */
 872         spa = nfit_buf + sizeof(*spa) * 9;
 873         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
 874         spa->header.length = sizeof(*spa);
 875         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
 876         spa->range_index = 9+1;
 877         spa->address = t->dimm_dma[3];
 878         spa->length = DIMM_SIZE;
 879
 880         offset = sizeof(*spa) * 10;
 881         /* mem-region0 (spa0, dimm0) */
 882         memdev = nfit_buf + offset;
 883         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 884         memdev->header.length = sizeof(*memdev);
 885         memdev->device_handle = handle[0];
 886         memdev->physical_id = 0;
 887         memdev->region_id = 0;
 888         memdev->range_index = 0+1;
 889         memdev->region_index = 4+1;
 890         memdev->region_size = SPA0_SIZE/2;
 891         memdev->region_offset = 1;
 892         memdev->address = 0;
 893         memdev->interleave_index = 0;
 894         memdev->interleave_ways = 2;
 895
 896         /* mem-region1 (spa0, dimm1) */
 897         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map);
 898         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 899         memdev->header.length = sizeof(*memdev);
 900         memdev->device_handle = handle[1];
 901         memdev->physical_id = 1;
 902         memdev->region_id = 0;
 903         memdev->range_index = 0+1;
 904         memdev->region_index = 5+1;
 905         memdev->region_size = SPA0_SIZE/2;
 906         memdev->region_offset = (1 << 8);
 907         memdev->address = 0;
 908         memdev->interleave_index = 0;
 909         memdev->interleave_ways = 2;
 910         memdev->flags = ACPI_NFIT_MEM_HEALTH_ENABLED;
 911
 912         /* mem-region2 (spa1, dimm0) */
 913         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 2;
 914         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 915         memdev->header.length = sizeof(*memdev);
 916         memdev->device_handle = handle[0];
 917         memdev->physical_id = 0;
 918         memdev->region_id = 1;
 919         memdev->range_index = 1+1;
 920         memdev->region_index = 4+1;
 921         memdev->region_size = SPA1_SIZE/4;
 922         memdev->region_offset = (1 << 16);
 923         memdev->address = SPA0_SIZE/2;
 924         memdev->interleave_index = 0;
 925         memdev->interleave_ways = 4;
 926         memdev->flags = ACPI_NFIT_MEM_HEALTH_ENABLED;
 927
 928         /* mem-region3 (spa1, dimm1) */
 929         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 3;
 930         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 931         memdev->header.length = sizeof(*memdev);
 932         memdev->device_handle = handle[1];
 933         memdev->physical_id = 1;
 934         memdev->region_id = 1;
 935         memdev->range_index = 1+1;
 936         memdev->region_index = 5+1;
 937         memdev->region_size = SPA1_SIZE/4;
 938         memdev->region_offset = (1 << 24);
 939         memdev->address = SPA0_SIZE/2;
 940         memdev->interleave_index = 0;
 941         memdev->interleave_ways = 4;
 942
 943         /* mem-region4 (spa1, dimm2) */
 944         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 4;
 945         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 946         memdev->header.length = sizeof(*memdev);
 947         memdev->device_handle = handle[2];
 948         memdev->physical_id = 2;
 949         memdev->region_id = 0;
 950         memdev->range_index = 1+1;
 951         memdev->region_index = 6+1;
 952         memdev->region_size = SPA1_SIZE/4;
 953         memdev->region_offset = (1ULL << 32);
 954         memdev->address = SPA0_SIZE/2;
 955         memdev->interleave_index = 0;
 956         memdev->interleave_ways = 4;
 957         memdev->flags = ACPI_NFIT_MEM_HEALTH_ENABLED;
 958
 959         /* mem-region5 (spa1, dimm3) */
 960         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 5;
 961         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 962         memdev->header.length = sizeof(*memdev);
 963         memdev->device_handle = handle[3];
 964         memdev->physical_id = 3;
 965         memdev->region_id = 0;
 966         memdev->range_index = 1+1;
 967         memdev->region_index = 7+1;
 968         memdev->region_size = SPA1_SIZE/4;
 969         memdev->region_offset = (1ULL << 40);
 970         memdev->address = SPA0_SIZE/2;
 971         memdev->interleave_index = 0;
 972         memdev->interleave_ways = 4;
 973
 974         /* mem-region6 (spa/dcr0, dimm0) */
 975         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 6;
 976         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 977         memdev->header.length = sizeof(*memdev);
 978         memdev->device_handle = handle[0];
 979         memdev->physical_id = 0;
 980         memdev->region_id = 0;
 981         memdev->range_index = 2+1;
 982         memdev->region_index = 0+1;
 983         memdev->region_size = 0;
 984         memdev->region_offset = 0;
 985         memdev->address = 0;
 986         memdev->interleave_index = 0;
 987         memdev->interleave_ways = 1;
 988
 989         /* mem-region7 (spa/dcr1, dimm1) */
 990         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 7;
 991         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
 992         memdev->header.length = sizeof(*memdev);
 993         memdev->device_handle = handle[1];
 994         memdev->physical_id = 1;
 995         memdev->region_id = 0;
 996         memdev->range_index = 3+1;
 997         memdev->region_index = 1+1;
 998         memdev->region_size = 0;
 999         memdev->region_offset = 0;
1000         memdev->address = 0;
1001         memdev->interleave_index = 0;
1002         memdev->interleave_ways = 1;
1003
1004         /* mem-region8 (spa/dcr2, dimm2) */
1005         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 8;
1006         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1007         memdev->header.length = sizeof(*memdev);
1008         memdev->device_handle = handle[2];
1009         memdev->physical_id = 2;
1010         memdev->region_id = 0;
1011         memdev->range_index = 4+1;
1012         memdev->region_index = 2+1;
1013         memdev->region_size = 0;
1014         memdev->region_offset = 0;
1015         memdev->address = 0;
1016         memdev->interleave_index = 0;
1017         memdev->interleave_ways = 1;
1018
1019         /* mem-region9 (spa/dcr3, dimm3) */
1020         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 9;
1021         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1022         memdev->header.length = sizeof(*memdev);
1023         memdev->device_handle = handle[3];
1024         memdev->physical_id = 3;
1025         memdev->region_id = 0;
1026         memdev->range_index = 5+1;
1027         memdev->region_index = 3+1;
1028         memdev->region_size = 0;
1029         memdev->region_offset = 0;
1030         memdev->address = 0;
1031         memdev->interleave_index = 0;
1032         memdev->interleave_ways = 1;
1033
1034         /* mem-region10 (spa/bdw0, dimm0) */
1035         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 10;
1036         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1037         memdev->header.length = sizeof(*memdev);
1038         memdev->device_handle = handle[0];
1039         memdev->physical_id = 0;
1040         memdev->region_id = 0;
1041         memdev->range_index = 6+1;
1042         memdev->region_index = 0+1;
1043         memdev->region_size = 0;
1044         memdev->region_offset = 0;
1045         memdev->address = 0;
1046         memdev->interleave_index = 0;
1047         memdev->interleave_ways = 1;
1048
1049         /* mem-region11 (spa/bdw1, dimm1) */
1050         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 11;
1051         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1052         memdev->header.length = sizeof(*memdev);
1053         memdev->device_handle = handle[1];
1054         memdev->physical_id = 1;
1055         memdev->region_id = 0;
1056         memdev->range_index = 7+1;
1057         memdev->region_index = 1+1;
1058         memdev->region_size = 0;
1059         memdev->region_offset = 0;
1060         memdev->address = 0;
1061         memdev->interleave_index = 0;
1062         memdev->interleave_ways = 1;
1063
1064         /* mem-region12 (spa/bdw2, dimm2) */
1065         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 12;
1066         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1067         memdev->header.length = sizeof(*memdev);
1068         memdev->device_handle = handle[2];
1069         memdev->physical_id = 2;
1070         memdev->region_id = 0;
1071         memdev->range_index = 8+1;
1072         memdev->region_index = 2+1;
1073         memdev->region_size = 0;
1074         memdev->region_offset = 0;
1075         memdev->address = 0;
1076         memdev->interleave_index = 0;
1077         memdev->interleave_ways = 1;
1078
1079         /* mem-region13 (spa/dcr3, dimm3) */
1080         memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 13;
1081         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1082         memdev->header.length = sizeof(*memdev);
1083         memdev->device_handle = handle[3];
1084         memdev->physical_id = 3;
1085         memdev->region_id = 0;
1086         memdev->range_index = 9+1;
1087         memdev->region_index = 3+1;
1088         memdev->region_size = 0;
1089         memdev->region_offset = 0;
1090         memdev->address = 0;
1091         memdev->interleave_index = 0;
1092         memdev->interleave_ways = 1;
1093         memdev->flags = ACPI_NFIT_MEM_HEALTH_ENABLED;
1094
1095         offset = offset + sizeof(struct acpi_nfit_memory_map) * 14;
1096         /* dcr-descriptor0: blk */
1097         dcr = nfit_buf + offset;
1098         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1099         dcr->header.length = sizeof(struct acpi_nfit_control_region);
1100         dcr->region_index = 0+1;
1101         dcr_common_init(dcr);
1102         dcr->serial_number = ~handle[0];
1103         dcr->code = NFIT_FIC_BLK;
1104         dcr->windows = 1;
1105         dcr->window_size = DCR_SIZE;
1106         dcr->command_offset = 0;
1107         dcr->command_size = 8;
1108         dcr->status_offset = 8;
1109         dcr->status_size = 4;
1110
1111         /* dcr-descriptor1: blk */
1112         dcr = nfit_buf + offset + sizeof(struct acpi_nfit_control_region);
1113         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1114         dcr->header.length = sizeof(struct acpi_nfit_control_region);
1115         dcr->region_index = 1+1;
1116         dcr_common_init(dcr);
1117         dcr->serial_number = ~handle[1];
1118         dcr->code = NFIT_FIC_BLK;
1119         dcr->windows = 1;
1120         dcr->window_size = DCR_SIZE;
1121         dcr->command_offset = 0;
1122         dcr->command_size = 8;
1123         dcr->status_offset = 8;
1124         dcr->status_size = 4;
1125
1126         /* dcr-descriptor2: blk */
1127         dcr = nfit_buf + offset + sizeof(struct acpi_nfit_control_region) * 2;
1128         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1129         dcr->header.length = sizeof(struct acpi_nfit_control_region);
1130         dcr->region_index = 2+1;
1131         dcr_common_init(dcr);
1132         dcr->serial_number = ~handle[2];
1133         dcr->code = NFIT_FIC_BLK;
1134         dcr->windows = 1;
1135         dcr->window_size = DCR_SIZE;
1136         dcr->command_offset = 0;
1137         dcr->command_size = 8;
1138         dcr->status_offset = 8;
1139         dcr->status_size = 4;
1140
1141         /* dcr-descriptor3: blk */
1142         dcr = nfit_buf + offset + sizeof(struct acpi_nfit_control_region) * 3;
1143         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1144         dcr->header.length = sizeof(struct acpi_nfit_control_region);
1145         dcr->region_index = 3+1;
1146         dcr_common_init(dcr);
1147         dcr->serial_number = ~handle[3];
1148         dcr->code = NFIT_FIC_BLK;
1149         dcr->windows = 1;
1150         dcr->window_size = DCR_SIZE;
1151         dcr->command_offset = 0;
1152         dcr->command_size = 8;
1153         dcr->status_offset = 8;
1154         dcr->status_size = 4;
1155
1156         offset = offset + sizeof(struct acpi_nfit_control_region) * 4;
1157         /* dcr-descriptor0: pmem */
1158         dcr = nfit_buf + offset;
1159         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1160         dcr->header.length = offsetof(struct acpi_nfit_control_region,
1161                         window_size);
1162         dcr->region_index = 4+1;
1163         dcr_common_init(dcr);
1164         dcr->serial_number = ~handle[0];
1165         dcr->code = NFIT_FIC_BYTEN;
1166         dcr->windows = 0;
1167
1168         /* dcr-descriptor1: pmem */
1169         dcr = nfit_buf + offset + offsetof(struct acpi_nfit_control_region,
1170                         window_size);
1171         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1172         dcr->header.length = offsetof(struct acpi_nfit_control_region,
1173                         window_size);
1174         dcr->region_index = 5+1;
1175         dcr_common_init(dcr);
1176         dcr->serial_number = ~handle[1];
1177         dcr->code = NFIT_FIC_BYTEN;
1178         dcr->windows = 0;
1179
1180         /* dcr-descriptor2: pmem */
1181         dcr = nfit_buf + offset + offsetof(struct acpi_nfit_control_region,
1182                         window_size) * 2;
1183         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1184         dcr->header.length = offsetof(struct acpi_nfit_control_region,
1185                         window_size);
1186         dcr->region_index = 6+1;
1187         dcr_common_init(dcr);
1188         dcr->serial_number = ~handle[2];
1189         dcr->code = NFIT_FIC_BYTEN;
1190         dcr->windows = 0;
1191
1192         /* dcr-descriptor3: pmem */
1193         dcr = nfit_buf + offset + offsetof(struct acpi_nfit_control_region,
1194                         window_size) * 3;
1195         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1196         dcr->header.length = offsetof(struct acpi_nfit_control_region,
1197                         window_size);
1198         dcr->region_index = 7+1;
1199         dcr_common_init(dcr);
1200         dcr->serial_number = ~handle[3];
1201         dcr->code = NFIT_FIC_BYTEN;
1202         dcr->windows = 0;
1203
1204         offset = offset + offsetof(struct acpi_nfit_control_region,
1205                         window_size) * 4;
1206         /* bdw0 (spa/dcr0, dimm0) */
1207         bdw = nfit_buf + offset;
1208         bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
1209         bdw->header.length = sizeof(struct acpi_nfit_data_region);
1210         bdw->region_index = 0+1;
1211         bdw->windows = 1;
1212         bdw->offset = 0;
1213         bdw->size = BDW_SIZE;
1214         bdw->capacity = DIMM_SIZE;
1215         bdw->start_address = 0;
1216
1217         /* bdw1 (spa/dcr1, dimm1) */
1218         bdw = nfit_buf + offset + sizeof(struct acpi_nfit_data_region);
1219         bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
1220         bdw->header.length = sizeof(struct acpi_nfit_data_region);
1221         bdw->region_index = 1+1;
1222         bdw->windows = 1;
1223         bdw->offset = 0;
1224         bdw->size = BDW_SIZE;
1225         bdw->capacity = DIMM_SIZE;
1226         bdw->start_address = 0;
1227
1228         /* bdw2 (spa/dcr2, dimm2) */
1229         bdw = nfit_buf + offset + sizeof(struct acpi_nfit_data_region) * 2;
1230         bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
1231         bdw->header.length = sizeof(struct acpi_nfit_data_region);
1232         bdw->region_index = 2+1;
1233         bdw->windows = 1;
1234         bdw->offset = 0;
1235         bdw->size = BDW_SIZE;
1236         bdw->capacity = DIMM_SIZE;
1237         bdw->start_address = 0;
1238
1239         /* bdw3 (spa/dcr3, dimm3) */
1240         bdw = nfit_buf + offset + sizeof(struct acpi_nfit_data_region) * 3;
1241         bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
1242         bdw->header.length = sizeof(struct acpi_nfit_data_region);
1243         bdw->region_index = 3+1;
1244         bdw->windows = 1;
1245         bdw->offset = 0;
1246         bdw->size = BDW_SIZE;
1247         bdw->capacity = DIMM_SIZE;
1248         bdw->start_address = 0;
1249
1250         offset = offset + sizeof(struct acpi_nfit_data_region) * 4;
1251         /* flush0 (dimm0) */
1252         flush = nfit_buf + offset;
1253         flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
1254         flush->header.length = flush_hint_size;
1255         flush->device_handle = handle[0];
1256         flush->hint_count = NUM_HINTS;
1257         for (i = 0; i < NUM_HINTS; i++)
1258                 flush->hint_address[i] = t->flush_dma[0] + i * sizeof(u64);
1259
1260         /* flush1 (dimm1) */
1261         flush = nfit_buf + offset + flush_hint_size * 1;
1262         flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
1263         flush->header.length = flush_hint_size;
1264         flush->device_handle = handle[1];
1265         flush->hint_count = NUM_HINTS;
1266         for (i = 0; i < NUM_HINTS; i++)
1267                 flush->hint_address[i] = t->flush_dma[1] + i * sizeof(u64);
1268
1269         /* flush2 (dimm2) */
1270         flush = nfit_buf + offset + flush_hint_size  * 2;
1271         flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
1272         flush->header.length = flush_hint_size;
1273         flush->device_handle = handle[2];
1274         flush->hint_count = NUM_HINTS;
1275         for (i = 0; i < NUM_HINTS; i++)
1276                 flush->hint_address[i] = t->flush_dma[2] + i * sizeof(u64);
1277
1278         /* flush3 (dimm3) */
1279         flush = nfit_buf + offset + flush_hint_size * 3;
1280         flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
1281         flush->header.length = flush_hint_size;
1282         flush->device_handle = handle[3];
1283         flush->hint_count = NUM_HINTS;
1284         for (i = 0; i < NUM_HINTS; i++)
1285                 flush->hint_address[i] = t->flush_dma[3] + i * sizeof(u64);
1286
1287         if (t->setup_hotplug) {
1288                 offset = offset + flush_hint_size * 4;
1289                 /* dcr-descriptor4: blk */
1290                 dcr = nfit_buf + offset;
1291                 dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1292                 dcr->header.length = sizeof(struct acpi_nfit_control_region);
1293                 dcr->region_index = 8+1;
1294                 dcr_common_init(dcr);
1295                 dcr->serial_number = ~handle[4];
1296                 dcr->code = NFIT_FIC_BLK;
1297                 dcr->windows = 1;
1298                 dcr->window_size = DCR_SIZE;
1299                 dcr->command_offset = 0;
1300                 dcr->command_size = 8;
1301                 dcr->status_offset = 8;
1302                 dcr->status_size = 4;
1303
1304                 offset = offset + sizeof(struct acpi_nfit_control_region);
1305                 /* dcr-descriptor4: pmem */
1306                 dcr = nfit_buf + offset;
1307                 dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1308                 dcr->header.length = offsetof(struct acpi_nfit_control_region,
1309                                 window_size);
1310                 dcr->region_index = 9+1;
1311                 dcr_common_init(dcr);
1312                 dcr->serial_number = ~handle[4];
1313                 dcr->code = NFIT_FIC_BYTEN;
1314                 dcr->windows = 0;
1315
1316                 offset = offset + offsetof(struct acpi_nfit_control_region,
1317                                 window_size);
1318                 /* bdw4 (spa/dcr4, dimm4) */
1319                 bdw = nfit_buf + offset;
1320                 bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION;
1321                 bdw->header.length = sizeof(struct acpi_nfit_data_region);
1322                 bdw->region_index = 8+1;
1323                 bdw->windows = 1;
1324                 bdw->offset = 0;
1325                 bdw->size = BDW_SIZE;
1326                 bdw->capacity = DIMM_SIZE;
1327                 bdw->start_address = 0;
1328
1329                 offset = offset + sizeof(struct acpi_nfit_data_region);
1330                 /* spa10 (dcr4) dimm4 */
1331                 spa = nfit_buf + offset;
1332                 spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1333                 spa->header.length = sizeof(*spa);
1334                 memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16);
1335                 spa->range_index = 10+1;
1336                 spa->address = t->dcr_dma[4];
1337                 spa->length = DCR_SIZE;
1338
1339                 /*
1340                  * spa11 (single-dimm interleave for hotplug, note storage
1341                  * does not actually alias the related block-data-window
1342                  * regions)
1343                  */
1344                 spa = nfit_buf + offset + sizeof(*spa);
1345                 spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1346                 spa->header.length = sizeof(*spa);
1347                 memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16);
1348                 spa->range_index = 11+1;
1349                 spa->address = t->spa_set_dma[2];
1350                 spa->length = SPA0_SIZE;
1351
1352                 /* spa12 (bdw for dcr4) dimm4 */
1353                 spa = nfit_buf + offset + sizeof(*spa) * 2;
1354                 spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1355                 spa->header.length = sizeof(*spa);
1356                 memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16);
1357                 spa->range_index = 12+1;
1358                 spa->address = t->dimm_dma[4];
1359                 spa->length = DIMM_SIZE;
1360
1361                 offset = offset + sizeof(*spa) * 3;
1362                 /* mem-region14 (spa/dcr4, dimm4) */
1363                 memdev = nfit_buf + offset;
1364                 memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1365                 memdev->header.length = sizeof(*memdev);
1366                 memdev->device_handle = handle[4];
1367                 memdev->physical_id = 4;
1368                 memdev->region_id = 0;
1369                 memdev->range_index = 10+1;
1370                 memdev->region_index = 8+1;
1371                 memdev->region_size = 0;
1372                 memdev->region_offset = 0;
1373                 memdev->address = 0;
1374                 memdev->interleave_index = 0;
1375                 memdev->interleave_ways = 1;
1376
1377                 /* mem-region15 (spa0, dimm4) */
1378                 memdev = nfit_buf + offset +
1379                                 sizeof(struct acpi_nfit_memory_map);
1380                 memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1381                 memdev->header.length = sizeof(*memdev);
1382                 memdev->device_handle = handle[4];
1383                 memdev->physical_id = 4;
1384                 memdev->region_id = 0;
1385                 memdev->range_index = 11+1;
1386                 memdev->region_index = 9+1;
1387                 memdev->region_size = SPA0_SIZE;
1388                 memdev->region_offset = (1ULL << 48);
1389                 memdev->address = 0;
1390                 memdev->interleave_index = 0;
1391                 memdev->interleave_ways = 1;
1392                 memdev->flags = ACPI_NFIT_MEM_HEALTH_ENABLED;
1393
1394                 /* mem-region16 (spa/bdw4, dimm4) */
1395                 memdev = nfit_buf + offset +
1396                                 sizeof(struct acpi_nfit_memory_map) * 2;
1397                 memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1398                 memdev->header.length = sizeof(*memdev);
1399                 memdev->device_handle = handle[4];
1400                 memdev->physical_id = 4;
1401                 memdev->region_id = 0;
1402                 memdev->range_index = 12+1;
1403                 memdev->region_index = 8+1;
1404                 memdev->region_size = 0;
1405                 memdev->region_offset = 0;
1406                 memdev->address = 0;
1407                 memdev->interleave_index = 0;
1408                 memdev->interleave_ways = 1;
1409
1410                 offset = offset + sizeof(struct acpi_nfit_memory_map) * 3;
1411                 /* flush3 (dimm4) */
1412                 flush = nfit_buf + offset;
1413                 flush->header.type = ACPI_NFIT_TYPE_FLUSH_ADDRESS;
1414                 flush->header.length = flush_hint_size;
1415                 flush->device_handle = handle[4];
1416                 flush->hint_count = NUM_HINTS;
1417                 for (i = 0; i < NUM_HINTS; i++)
1418                         flush->hint_address[i] = t->flush_dma[4]
1419                                 + i * sizeof(u64);
1420         }
1421
1422         post_ars_status(&t->ars_state, t->spa_set_dma[0], SPA0_SIZE);
1423
1424         acpi_desc = &t->acpi_desc;
1425         set_bit(ND_CMD_GET_CONFIG_SIZE, &acpi_desc->dimm_cmd_force_en);
1426         set_bit(ND_CMD_GET_CONFIG_DATA, &acpi_desc->dimm_cmd_force_en);
1427         set_bit(ND_CMD_SET_CONFIG_DATA, &acpi_desc->dimm_cmd_force_en);
1428         set_bit(ND_CMD_SMART, &acpi_desc->dimm_cmd_force_en);
1429         set_bit(ND_CMD_ARS_CAP, &acpi_desc->bus_cmd_force_en);
1430         set_bit(ND_CMD_ARS_START, &acpi_desc->bus_cmd_force_en);
1431         set_bit(ND_CMD_ARS_STATUS, &acpi_desc->bus_cmd_force_en);
1432         set_bit(ND_CMD_CLEAR_ERROR, &acpi_desc->bus_cmd_force_en);
1433         set_bit(ND_CMD_SMART_THRESHOLD, &acpi_desc->dimm_cmd_force_en);
1434 }
1435
1436 static void nfit_test1_setup(struct nfit_test *t)
1437 {
1438         size_t offset;
1439         void *nfit_buf = t->nfit_buf;
1440         struct acpi_nfit_memory_map *memdev;
1441         struct acpi_nfit_control_region *dcr;
1442         struct acpi_nfit_system_address *spa;
1443         struct acpi_nfit_desc *acpi_desc;
1444
1445         offset = 0;
1446         /* spa0 (flat range with no bdw aliasing) */
1447         spa = nfit_buf + offset;
1448         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1449         spa->header.length = sizeof(*spa);
1450         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16);
1451         spa->range_index = 0+1;
1452         spa->address = t->spa_set_dma[0];
1453         spa->length = SPA2_SIZE;
1454
1455         /* virtual cd region */
1456         spa = nfit_buf + sizeof(*spa);
1457         spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS;
1458         spa->header.length = sizeof(*spa);
1459         memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_VCD), 16);
1460         spa->range_index = 0;
1461         spa->address = t->spa_set_dma[1];
1462         spa->length = SPA_VCD_SIZE;
1463
1464         offset += sizeof(*spa) * 2;
1465         /* mem-region0 (spa0, dimm0) */
1466         memdev = nfit_buf + offset;
1467         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1468         memdev->header.length = sizeof(*memdev);
1469         memdev->device_handle = handle[5];
1470         memdev->physical_id = 0;
1471         memdev->region_id = 0;
1472         memdev->range_index = 0+1;
1473         memdev->region_index = 0+1;
1474         memdev->region_size = SPA2_SIZE;
1475         memdev->region_offset = 0;
1476         memdev->address = 0;
1477         memdev->interleave_index = 0;
1478         memdev->interleave_ways = 1;
1479         memdev->flags = ACPI_NFIT_MEM_SAVE_FAILED | ACPI_NFIT_MEM_RESTORE_FAILED
1480                 | ACPI_NFIT_MEM_FLUSH_FAILED | ACPI_NFIT_MEM_HEALTH_OBSERVED
1481                 | ACPI_NFIT_MEM_NOT_ARMED;
1482
1483         offset += sizeof(*memdev);
1484         /* dcr-descriptor0 */
1485         dcr = nfit_buf + offset;
1486         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1487         dcr->header.length = offsetof(struct acpi_nfit_control_region,
1488                         window_size);
1489         dcr->region_index = 0+1;
1490         dcr_common_init(dcr);
1491         dcr->serial_number = ~handle[5];
1492         dcr->code = NFIT_FIC_BYTE;
1493         dcr->windows = 0;
1494
1495         offset += dcr->header.length;
1496         memdev = nfit_buf + offset;
1497         memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP;
1498         memdev->header.length = sizeof(*memdev);
1499         memdev->device_handle = handle[6];
1500         memdev->physical_id = 0;
1501         memdev->region_id = 0;
1502         memdev->range_index = 0;
1503         memdev->region_index = 0+2;
1504         memdev->region_size = SPA2_SIZE;
1505         memdev->region_offset = 0;
1506         memdev->address = 0;
1507         memdev->interleave_index = 0;
1508         memdev->interleave_ways = 1;
1509         memdev->flags = ACPI_NFIT_MEM_MAP_FAILED;
1510
1511         /* dcr-descriptor1 */
1512         offset += sizeof(*memdev);
1513         dcr = nfit_buf + offset;
1514         dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION;
1515         dcr->header.length = offsetof(struct acpi_nfit_control_region,
1516                         window_size);
1517         dcr->region_index = 0+2;
1518         dcr_common_init(dcr);
1519         dcr->serial_number = ~handle[6];
1520         dcr->code = NFIT_FIC_BYTE;
1521         dcr->windows = 0;
1522
1523         post_ars_status(&t->ars_state, t->spa_set_dma[0], SPA2_SIZE);
1524
1525         acpi_desc = &t->acpi_desc;
1526         set_bit(ND_CMD_ARS_CAP, &acpi_desc->bus_cmd_force_en);
1527         set_bit(ND_CMD_ARS_START, &acpi_desc->bus_cmd_force_en);
1528         set_bit(ND_CMD_ARS_STATUS, &acpi_desc->bus_cmd_force_en);
1529         set_bit(ND_CMD_CLEAR_ERROR, &acpi_desc->bus_cmd_force_en);
1530 }
1531
1532 static int nfit_test_blk_do_io(struct nd_blk_region *ndbr, resource_size_t dpa,
1533                 void *iobuf, u64 len, int rw)
1534 {
1535         struct nfit_blk *nfit_blk = ndbr->blk_provider_data;
1536         struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
1537         struct nd_region *nd_region = &ndbr->nd_region;
1538         unsigned int lane;
1539
1540         lane = nd_region_acquire_lane(nd_region);
1541         if (rw)
1542                 memcpy(mmio->addr.base + dpa, iobuf, len);
1543         else {
1544                 memcpy(iobuf, mmio->addr.base + dpa, len);
1545
1546                 /* give us some some coverage of the arch_invalidate_pmem() API */
1547                 arch_invalidate_pmem(mmio->addr.base + dpa, len);
1548         }
1549         nd_region_release_lane(nd_region, lane);
1550
1551         return 0;
1552 }
1553
1554 static unsigned long nfit_ctl_handle;
1555
1556 union acpi_object *result;
1557
1558 static union acpi_object *nfit_test_evaluate_dsm(acpi_handle handle,
1559                 const guid_t *guid, u64 rev, u64 func, union acpi_object *argv4)
1560 {
1561         if (handle != &nfit_ctl_handle)
1562                 return ERR_PTR(-ENXIO);
1563
1564         return result;
1565 }
1566
1567 static int setup_result(void *buf, size_t size)
1568 {
1569         result = kmalloc(sizeof(union acpi_object) + size, GFP_KERNEL);
1570         if (!result)
1571                 return -ENOMEM;
1572         result->package.type = ACPI_TYPE_BUFFER,
1573         result->buffer.pointer = (void *) (result + 1);
1574         result->buffer.length = size;
1575         memcpy(result->buffer.pointer, buf, size);
1576         memset(buf, 0, size);
1577         return 0;
1578 }
1579
1580 static int nfit_ctl_test(struct device *dev)
1581 {
1582         int rc, cmd_rc;
1583         struct nvdimm *nvdimm;
1584         struct acpi_device *adev;
1585         struct nfit_mem *nfit_mem;
1586         struct nd_ars_record *record;
1587         struct acpi_nfit_desc *acpi_desc;
1588         const u64 test_val = 0x0123456789abcdefULL;
1589         unsigned long mask, cmd_size, offset;
1590         union {
1591                 struct nd_cmd_get_config_size cfg_size;
1592                 struct nd_cmd_ars_status ars_stat;
1593                 struct nd_cmd_ars_cap ars_cap;
1594                 char buf[sizeof(struct nd_cmd_ars_status)
1595                         + sizeof(struct nd_ars_record)];
1596         } cmds;
1597
1598         adev = devm_kzalloc(dev, sizeof(*adev), GFP_KERNEL);
1599         if (!adev)
1600                 return -ENOMEM;
1601         *adev = (struct acpi_device) {
1602                 .handle = &nfit_ctl_handle,
1603                 .dev = {
1604                         .init_name = "test-adev",
1605                 },
1606         };
1607
1608         acpi_desc = devm_kzalloc(dev, sizeof(*acpi_desc), GFP_KERNEL);
1609         if (!acpi_desc)
1610                 return -ENOMEM;
1611         *acpi_desc = (struct acpi_nfit_desc) {
1612                 .nd_desc = {
1613                         .cmd_mask = 1UL << ND_CMD_ARS_CAP
1614                                 | 1UL << ND_CMD_ARS_START
1615                                 | 1UL << ND_CMD_ARS_STATUS
1616                                 | 1UL << ND_CMD_CLEAR_ERROR,
1617                         .module = THIS_MODULE,
1618                         .provider_name = "ACPI.NFIT",
1619                         .ndctl = acpi_nfit_ctl,
1620                 },
1621                 .dev = &adev->dev,
1622         };
1623
1624         nfit_mem = devm_kzalloc(dev, sizeof(*nfit_mem), GFP_KERNEL);
1625         if (!nfit_mem)
1626                 return -ENOMEM;
1627
1628         mask = 1UL << ND_CMD_SMART | 1UL << ND_CMD_SMART_THRESHOLD
1629                 | 1UL << ND_CMD_DIMM_FLAGS | 1UL << ND_CMD_GET_CONFIG_SIZE
1630                 | 1UL << ND_CMD_GET_CONFIG_DATA | 1UL << ND_CMD_SET_CONFIG_DATA
1631                 | 1UL << ND_CMD_VENDOR;
1632         *nfit_mem = (struct nfit_mem) {
1633                 .adev = adev,
1634                 .family = NVDIMM_FAMILY_INTEL,
1635                 .dsm_mask = mask,
1636         };
1637
1638         nvdimm = devm_kzalloc(dev, sizeof(*nvdimm), GFP_KERNEL);
1639         if (!nvdimm)
1640                 return -ENOMEM;
1641         *nvdimm = (struct nvdimm) {
1642                 .provider_data = nfit_mem,
1643                 .cmd_mask = mask,
1644                 .dev = {
1645                         .init_name = "test-dimm",
1646                 },
1647         };
1648
1649
1650         /* basic checkout of a typical 'get config size' command */
1651         cmd_size = sizeof(cmds.cfg_size);
1652         cmds.cfg_size = (struct nd_cmd_get_config_size) {
1653                 .status = 0,
1654                 .config_size = SZ_128K,
1655                 .max_xfer = SZ_4K,
1656         };
1657         rc = setup_result(cmds.buf, cmd_size);
1658         if (rc)
1659                 return rc;
1660         rc = acpi_nfit_ctl(&acpi_desc->nd_desc, nvdimm, ND_CMD_GET_CONFIG_SIZE,
1661                         cmds.buf, cmd_size, &cmd_rc);
1662
1663         if (rc < 0 || cmd_rc || cmds.cfg_size.status != 0
1664                         || cmds.cfg_size.config_size != SZ_128K
1665                         || cmds.cfg_size.max_xfer != SZ_4K) {
1666                 dev_dbg(dev, "%s: failed at: %d rc: %d cmd_rc: %d\n",
1667                                 __func__, __LINE__, rc, cmd_rc);
1668                 return -EIO;
1669         }
1670
1671
1672         /* test ars_status with zero output */
1673         cmd_size = offsetof(struct nd_cmd_ars_status, address);
1674         cmds.ars_stat = (struct nd_cmd_ars_status) {
1675                 .out_length = 0,
1676         };
1677         rc = setup_result(cmds.buf, cmd_size);
1678         if (rc)
1679                 return rc;
1680         rc = acpi_nfit_ctl(&acpi_desc->nd_desc, NULL, ND_CMD_ARS_STATUS,
1681                         cmds.buf, cmd_size, &cmd_rc);
1682
1683         if (rc < 0 || cmd_rc) {
1684                 dev_dbg(dev, "%s: failed at: %d rc: %d cmd_rc: %d\n",
1685                                 __func__, __LINE__, rc, cmd_rc);
1686                 return -EIO;
1687         }
1688
1689
1690         /* test ars_cap with benign extended status */
1691         cmd_size = sizeof(cmds.ars_cap);
1692         cmds.ars_cap = (struct nd_cmd_ars_cap) {
1693                 .status = ND_ARS_PERSISTENT << 16,
1694         };
1695         offset = offsetof(struct nd_cmd_ars_cap, status);
1696         rc = setup_result(cmds.buf + offset, cmd_size - offset);
1697         if (rc)
1698                 return rc;
1699         rc = acpi_nfit_ctl(&acpi_desc->nd_desc, NULL, ND_CMD_ARS_CAP,
1700                         cmds.buf, cmd_size, &cmd_rc);
1701
1702         if (rc < 0 || cmd_rc) {
1703                 dev_dbg(dev, "%s: failed at: %d rc: %d cmd_rc: %d\n",
1704                                 __func__, __LINE__, rc, cmd_rc);
1705                 return -EIO;
1706         }
1707
1708
1709         /* test ars_status with 'status' trimmed from 'out_length' */
1710         cmd_size = sizeof(cmds.ars_stat) + sizeof(struct nd_ars_record);
1711         cmds.ars_stat = (struct nd_cmd_ars_status) {
1712                 .out_length = cmd_size - 4,
1713         };
1714         record = &cmds.ars_stat.records[0];
1715         *record = (struct nd_ars_record) {
1716                 .length = test_val,
1717         };
1718         rc = setup_result(cmds.buf, cmd_size);
1719         if (rc)
1720                 return rc;
1721         rc = acpi_nfit_ctl(&acpi_desc->nd_desc, NULL, ND_CMD_ARS_STATUS,
1722                         cmds.buf, cmd_size, &cmd_rc);
1723
1724         if (rc < 0 || cmd_rc || record->length != test_val) {
1725                 dev_dbg(dev, "%s: failed at: %d rc: %d cmd_rc: %d\n",
1726                                 __func__, __LINE__, rc, cmd_rc);
1727                 return -EIO;
1728         }
1729
1730
1731         /* test ars_status with 'Output (Size)' including 'status' */
1732         cmd_size = sizeof(cmds.ars_stat) + sizeof(struct nd_ars_record);
1733         cmds.ars_stat = (struct nd_cmd_ars_status) {
1734                 .out_length = cmd_size,
1735         };
1736         record = &cmds.ars_stat.records[0];
1737         *record = (struct nd_ars_record) {
1738                 .length = test_val,
1739         };
1740         rc = setup_result(cmds.buf, cmd_size);
1741         if (rc)
1742                 return rc;
1743         rc = acpi_nfit_ctl(&acpi_desc->nd_desc, NULL, ND_CMD_ARS_STATUS,
1744                         cmds.buf, cmd_size, &cmd_rc);
1745
1746         if (rc < 0 || cmd_rc || record->length != test_val) {
1747                 dev_dbg(dev, "%s: failed at: %d rc: %d cmd_rc: %d\n",
1748                                 __func__, __LINE__, rc, cmd_rc);
1749                 return -EIO;
1750         }
1751
1752
1753         /* test extended status for get_config_size results in failure */
1754         cmd_size = sizeof(cmds.cfg_size);
1755         cmds.cfg_size = (struct nd_cmd_get_config_size) {
1756                 .status = 1 << 16,
1757         };
1758         rc = setup_result(cmds.buf, cmd_size);
1759         if (rc)
1760                 return rc;
1761         rc = acpi_nfit_ctl(&acpi_desc->nd_desc, nvdimm, ND_CMD_GET_CONFIG_SIZE,
1762                         cmds.buf, cmd_size, &cmd_rc);
1763
1764         if (rc < 0 || cmd_rc >= 0) {
1765                 dev_dbg(dev, "%s: failed at: %d rc: %d cmd_rc: %d\n",
1766                                 __func__, __LINE__, rc, cmd_rc);
1767                 return -EIO;
1768         }
1769
1770         return 0;
1771 }
1772
1773 static int nfit_test_probe(struct platform_device *pdev)
1774 {
1775         struct nvdimm_bus_descriptor *nd_desc;
1776         struct acpi_nfit_desc *acpi_desc;
1777         struct device *dev = &pdev->dev;
1778         struct nfit_test *nfit_test;
1779         struct nfit_mem *nfit_mem;
1780         union acpi_object *obj;
1781         int rc;
1782
1783         if (strcmp(dev_name(&pdev->dev), "nfit_test.0") == 0) {
1784                 rc = nfit_ctl_test(&pdev->dev);
1785                 if (rc)
1786                         return rc;
1787         }
1788
1789         nfit_test = to_nfit_test(&pdev->dev);
1790
1791         /* common alloc */
1792         if (nfit_test->num_dcr) {
1793                 int num = nfit_test->num_dcr;
1794
1795                 nfit_test->dimm = devm_kcalloc(dev, num, sizeof(void *),
1796                                 GFP_KERNEL);
1797                 nfit_test->dimm_dma = devm_kcalloc(dev, num, sizeof(dma_addr_t),
1798                                 GFP_KERNEL);
1799                 nfit_test->flush = devm_kcalloc(dev, num, sizeof(void *),
1800                                 GFP_KERNEL);
1801                 nfit_test->flush_dma = devm_kcalloc(dev, num, sizeof(dma_addr_t),
1802                                 GFP_KERNEL);
1803                 nfit_test->label = devm_kcalloc(dev, num, sizeof(void *),
1804                                 GFP_KERNEL);
1805                 nfit_test->label_dma = devm_kcalloc(dev, num,
1806                                 sizeof(dma_addr_t), GFP_KERNEL);
1807                 nfit_test->dcr = devm_kcalloc(dev, num,
1808                                 sizeof(struct nfit_test_dcr *), GFP_KERNEL);
1809                 nfit_test->dcr_dma = devm_kcalloc(dev, num,
1810                                 sizeof(dma_addr_t), GFP_KERNEL);
1811                 if (nfit_test->dimm && nfit_test->dimm_dma && nfit_test->label
1812                                 && nfit_test->label_dma && nfit_test->dcr
1813                                 && nfit_test->dcr_dma && nfit_test->flush
1814                                 && nfit_test->flush_dma)
1815                         /* pass */;
1816                 else
1817                         return -ENOMEM;
1818         }
1819
1820         if (nfit_test->num_pm) {
1821                 int num = nfit_test->num_pm;
1822
1823                 nfit_test->spa_set = devm_kcalloc(dev, num, sizeof(void *),
1824                                 GFP_KERNEL);
1825                 nfit_test->spa_set_dma = devm_kcalloc(dev, num,
1826                                 sizeof(dma_addr_t), GFP_KERNEL);
1827                 if (nfit_test->spa_set && nfit_test->spa_set_dma)
1828                         /* pass */;
1829                 else
1830                         return -ENOMEM;
1831         }
1832
1833         /* per-nfit specific alloc */
1834         if (nfit_test->alloc(nfit_test))
1835                 return -ENOMEM;
1836
1837         nfit_test->setup(nfit_test);
1838         acpi_desc = &nfit_test->acpi_desc;
1839         acpi_nfit_desc_init(acpi_desc, &pdev->dev);
1840         acpi_desc->blk_do_io = nfit_test_blk_do_io;
1841         nd_desc = &acpi_desc->nd_desc;
1842         nd_desc->provider_name = NULL;
1843         nd_desc->module = THIS_MODULE;
1844         nd_desc->ndctl = nfit_test_ctl;
1845
1846         rc = acpi_nfit_init(acpi_desc, nfit_test->nfit_buf,
1847                         nfit_test->nfit_size);
1848         if (rc)
1849                 return rc;
1850
1851         rc = devm_add_action_or_reset(&pdev->dev, acpi_nfit_shutdown, acpi_desc);
1852         if (rc)
1853                 return rc;
1854
1855         if (nfit_test->setup != nfit_test0_setup)
1856                 return 0;
1857
1858         nfit_test->setup_hotplug = 1;
1859         nfit_test->setup(nfit_test);
1860
1861         obj = kzalloc(sizeof(*obj), GFP_KERNEL);
1862         if (!obj)
1863                 return -ENOMEM;
1864         obj->type = ACPI_TYPE_BUFFER;
1865         obj->buffer.length = nfit_test->nfit_size;
1866         obj->buffer.pointer = nfit_test->nfit_buf;
1867         *(nfit_test->_fit) = obj;
1868         __acpi_nfit_notify(&pdev->dev, nfit_test, 0x80);
1869
1870         /* associate dimm devices with nfit_mem data for notification testing */
1871         mutex_lock(&acpi_desc->init_mutex);
1872         list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
1873                 u32 nfit_handle = __to_nfit_memdev(nfit_mem)->device_handle;
1874                 int i;
1875
1876                 for (i = 0; i < NUM_DCR; i++)
1877                         if (nfit_handle == handle[i])
1878                                 dev_set_drvdata(nfit_test->dimm_dev[i],
1879                                                 nfit_mem);
1880         }
1881         mutex_unlock(&acpi_desc->init_mutex);
1882
1883         return 0;
1884 }
1885
1886 static int nfit_test_remove(struct platform_device *pdev)
1887 {
1888         return 0;
1889 }
1890
1891 static void nfit_test_release(struct device *dev)
1892 {
1893         struct nfit_test *nfit_test = to_nfit_test(dev);
1894
1895         kfree(nfit_test);
1896 }
1897
1898 static const struct platform_device_id nfit_test_id[] = {
1899         { KBUILD_MODNAME },
1900         { },
1901 };
1902
1903 static struct platform_driver nfit_test_driver = {
1904         .probe = nfit_test_probe,
1905         .remove = nfit_test_remove,
1906         .driver = {
1907                 .name = KBUILD_MODNAME,
1908         },
1909         .id_table = nfit_test_id,
1910 };
1911
1912 static __init int nfit_test_init(void)
1913 {
1914         int rc, i;
1915
1916         nfit_test_setup(nfit_test_lookup, nfit_test_evaluate_dsm);
1917
1918         nfit_test_dimm = class_create(THIS_MODULE, "nfit_test_dimm");
1919         if (IS_ERR(nfit_test_dimm)) {
1920                 rc = PTR_ERR(nfit_test_dimm);
1921                 goto err_register;
1922         }
1923
1924         for (i = 0; i < NUM_NFITS; i++) {
1925                 struct nfit_test *nfit_test;
1926                 struct platform_device *pdev;
1927
1928                 nfit_test = kzalloc(sizeof(*nfit_test), GFP_KERNEL);
1929                 if (!nfit_test) {
1930                         rc = -ENOMEM;
1931                         goto err_register;
1932                 }
1933                 INIT_LIST_HEAD(&nfit_test->resources);
1934                 switch (i) {
1935                 case 0:
1936                         nfit_test->num_pm = NUM_PM;
1937                         nfit_test->dcr_idx = 0;
1938                         nfit_test->num_dcr = NUM_DCR;
1939                         nfit_test->alloc = nfit_test0_alloc;
1940                         nfit_test->setup = nfit_test0_setup;
1941                         break;
1942                 case 1:
1943                         nfit_test->num_pm = 2;
1944                         nfit_test->dcr_idx = NUM_DCR;
1945                         nfit_test->num_dcr = 2;
1946                         nfit_test->alloc = nfit_test1_alloc;
1947                         nfit_test->setup = nfit_test1_setup;
1948                         break;
1949                 default:
1950                         rc = -EINVAL;
1951                         goto err_register;
1952                 }
1953                 pdev = &nfit_test->pdev;
1954                 pdev->name = KBUILD_MODNAME;
1955                 pdev->id = i;
1956                 pdev->dev.release = nfit_test_release;
1957                 rc = platform_device_register(pdev);
1958                 if (rc) {
1959                         put_device(&pdev->dev);
1960                         goto err_register;
1961                 }
1962                 get_device(&pdev->dev);
1963
1964                 rc = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
1965                 if (rc)
1966                         goto err_register;
1967
1968                 instances[i] = nfit_test;
1969         }
1970
1971         rc = platform_driver_register(&nfit_test_driver);
1972         if (rc)
1973                 goto err_register;
1974         return 0;
1975
1976  err_register:
1977         for (i = 0; i < NUM_NFITS; i++)
1978                 if (instances[i])
1979                         platform_device_unregister(&instances[i]->pdev);
1980         nfit_test_teardown();
1981         for (i = 0; i < NUM_NFITS; i++)
1982                 if (instances[i])
1983                         put_device(&instances[i]->pdev.dev);
1984
1985         return rc;
1986 }
1987
1988 static __exit void nfit_test_exit(void)
1989 {
1990         int i;
1991
1992         for (i = 0; i < NUM_NFITS; i++)
1993                 platform_device_unregister(&instances[i]->pdev);
1994         platform_driver_unregister(&nfit_test_driver);
1995         nfit_test_teardown();
1996
1997         for (i = 0; i < NUM_NFITS; i++)
1998                 put_device(&instances[i]->pdev.dev);
1999         class_destroy(nfit_test_dimm);
2000 }
2001
2002 module_init(nfit_test_init);
2003 module_exit(nfit_test_exit);
2004 MODULE_LICENSE("GPL v2");
2005 MODULE_AUTHOR("Intel Corporation");