1 // SPDX-License-Identifier: GPL-2.0-only 2 // Copyright(c) 2021 Intel Corporation. All rights reserved. 3 4 #include <linux/platform_device.h> 5 #include <linux/mod_devicetable.h> 6 #include <linux/module.h> 7 #include <linux/delay.h> 8 #include <linux/sizes.h> 9 #include <linux/bits.h> 10 #include <asm/unaligned.h> 11 #include <cxlmem.h> 12 13 #include "trace.h" 14 15 #define LSA_SIZE SZ_128K 16 #define DEV_SIZE SZ_2G 17 #define EFFECT(x) (1U << x) 18 19 #define MOCK_INJECT_DEV_MAX 8 20 #define MOCK_INJECT_TEST_MAX 128 21 22 static unsigned int poison_inject_dev_max = MOCK_INJECT_DEV_MAX; 23 24 static struct cxl_cel_entry mock_cel[] = { 25 { 26 .opcode = cpu_to_le16(CXL_MBOX_OP_GET_SUPPORTED_LOGS), 27 .effect = cpu_to_le16(0), 28 }, 29 { 30 .opcode = cpu_to_le16(CXL_MBOX_OP_IDENTIFY), 31 .effect = cpu_to_le16(0), 32 }, 33 { 34 .opcode = cpu_to_le16(CXL_MBOX_OP_GET_LSA), 35 .effect = cpu_to_le16(0), 36 }, 37 { 38 .opcode = cpu_to_le16(CXL_MBOX_OP_GET_PARTITION_INFO), 39 .effect = cpu_to_le16(0), 40 }, 41 { 42 .opcode = cpu_to_le16(CXL_MBOX_OP_SET_LSA), 43 .effect = cpu_to_le16(EFFECT(1) | EFFECT(2)), 44 }, 45 { 46 .opcode = cpu_to_le16(CXL_MBOX_OP_GET_HEALTH_INFO), 47 .effect = cpu_to_le16(0), 48 }, 49 { 50 .opcode = cpu_to_le16(CXL_MBOX_OP_GET_POISON), 51 .effect = cpu_to_le16(0), 52 }, 53 { 54 .opcode = cpu_to_le16(CXL_MBOX_OP_INJECT_POISON), 55 .effect = cpu_to_le16(0), 56 }, 57 { 58 .opcode = cpu_to_le16(CXL_MBOX_OP_CLEAR_POISON), 59 .effect = cpu_to_le16(0), 60 }, 61 }; 62 63 /* See CXL 2.0 Table 181 Get Health Info Output Payload */ 64 struct cxl_mbox_health_info { 65 u8 health_status; 66 u8 media_status; 67 u8 ext_status; 68 u8 life_used; 69 __le16 temperature; 70 __le32 dirty_shutdowns; 71 __le32 volatile_errors; 72 __le32 pmem_errors; 73 } __packed; 74 75 static struct { 76 struct cxl_mbox_get_supported_logs gsl; 77 struct cxl_gsl_entry entry; 78 } mock_gsl_payload = { 79 .gsl = { 80 .entries = cpu_to_le16(1), 81 }, 82 .entry = { 83 .uuid = DEFINE_CXL_CEL_UUID, 84 .size = cpu_to_le32(sizeof(mock_cel)), 85 }, 86 }; 87 88 #define PASS_TRY_LIMIT 3 89 90 #define CXL_TEST_EVENT_CNT_MAX 15 91 92 /* Set a number of events to return at a time for simulation. */ 93 #define CXL_TEST_EVENT_CNT 3 94 95 struct mock_event_log { 96 u16 clear_idx; 97 u16 cur_idx; 98 u16 nr_events; 99 u16 nr_overflow; 100 u16 overflow_reset; 101 struct cxl_event_record_raw *events[CXL_TEST_EVENT_CNT_MAX]; 102 }; 103 104 struct mock_event_store { 105 struct cxl_dev_state *cxlds; 106 struct mock_event_log mock_logs[CXL_EVENT_TYPE_MAX]; 107 u32 ev_status; 108 }; 109 110 struct cxl_mockmem_data { 111 void *lsa; 112 u32 security_state; 113 u8 user_pass[NVDIMM_PASSPHRASE_LEN]; 114 u8 master_pass[NVDIMM_PASSPHRASE_LEN]; 115 int user_limit; 116 int master_limit; 117 struct mock_event_store mes; 118 u8 event_buf[SZ_4K]; 119 u64 timestamp; 120 }; 121 122 static struct mock_event_log *event_find_log(struct device *dev, int log_type) 123 { 124 struct cxl_mockmem_data *mdata = dev_get_drvdata(dev); 125 126 if (log_type >= CXL_EVENT_TYPE_MAX) 127 return NULL; 128 return &mdata->mes.mock_logs[log_type]; 129 } 130 131 static struct cxl_event_record_raw *event_get_current(struct mock_event_log *log) 132 { 133 return log->events[log->cur_idx]; 134 } 135 136 static void event_reset_log(struct mock_event_log *log) 137 { 138 log->cur_idx = 0; 139 log->clear_idx = 0; 140 log->nr_overflow = log->overflow_reset; 141 } 142 143 /* Handle can never be 0 use 1 based indexing for handle */ 144 static u16 event_get_clear_handle(struct mock_event_log *log) 145 { 146 return log->clear_idx + 1; 147 } 148 149 /* Handle can never be 0 use 1 based indexing for handle */ 150 static __le16 event_get_cur_event_handle(struct mock_event_log *log) 151 { 152 u16 cur_handle = log->cur_idx + 1; 153 154 return cpu_to_le16(cur_handle); 155 } 156 157 static bool event_log_empty(struct mock_event_log *log) 158 { 159 return log->cur_idx == log->nr_events; 160 } 161 162 static void mes_add_event(struct mock_event_store *mes, 163 enum cxl_event_log_type log_type, 164 struct cxl_event_record_raw *event) 165 { 166 struct mock_event_log *log; 167 168 if (WARN_ON(log_type >= CXL_EVENT_TYPE_MAX)) 169 return; 170 171 log = &mes->mock_logs[log_type]; 172 173 if ((log->nr_events + 1) > CXL_TEST_EVENT_CNT_MAX) { 174 log->nr_overflow++; 175 log->overflow_reset = log->nr_overflow; 176 return; 177 } 178 179 log->events[log->nr_events] = event; 180 log->nr_events++; 181 } 182 183 static int mock_get_event(struct cxl_dev_state *cxlds, 184 struct cxl_mbox_cmd *cmd) 185 { 186 struct cxl_get_event_payload *pl; 187 struct mock_event_log *log; 188 u16 nr_overflow; 189 u8 log_type; 190 int i; 191 192 if (cmd->size_in != sizeof(log_type)) 193 return -EINVAL; 194 195 if (cmd->size_out < struct_size(pl, records, CXL_TEST_EVENT_CNT)) 196 return -EINVAL; 197 198 log_type = *((u8 *)cmd->payload_in); 199 if (log_type >= CXL_EVENT_TYPE_MAX) 200 return -EINVAL; 201 202 memset(cmd->payload_out, 0, cmd->size_out); 203 204 log = event_find_log(cxlds->dev, log_type); 205 if (!log || event_log_empty(log)) 206 return 0; 207 208 pl = cmd->payload_out; 209 210 for (i = 0; i < CXL_TEST_EVENT_CNT && !event_log_empty(log); i++) { 211 memcpy(&pl->records[i], event_get_current(log), 212 sizeof(pl->records[i])); 213 pl->records[i].hdr.handle = event_get_cur_event_handle(log); 214 log->cur_idx++; 215 } 216 217 pl->record_count = cpu_to_le16(i); 218 if (!event_log_empty(log)) 219 pl->flags |= CXL_GET_EVENT_FLAG_MORE_RECORDS; 220 221 if (log->nr_overflow) { 222 u64 ns; 223 224 pl->flags |= CXL_GET_EVENT_FLAG_OVERFLOW; 225 pl->overflow_err_count = cpu_to_le16(nr_overflow); 226 ns = ktime_get_real_ns(); 227 ns -= 5000000000; /* 5s ago */ 228 pl->first_overflow_timestamp = cpu_to_le64(ns); 229 ns = ktime_get_real_ns(); 230 ns -= 1000000000; /* 1s ago */ 231 pl->last_overflow_timestamp = cpu_to_le64(ns); 232 } 233 234 return 0; 235 } 236 237 static int mock_clear_event(struct cxl_dev_state *cxlds, 238 struct cxl_mbox_cmd *cmd) 239 { 240 struct cxl_mbox_clear_event_payload *pl = cmd->payload_in; 241 struct mock_event_log *log; 242 u8 log_type = pl->event_log; 243 u16 handle; 244 int nr; 245 246 if (log_type >= CXL_EVENT_TYPE_MAX) 247 return -EINVAL; 248 249 log = event_find_log(cxlds->dev, log_type); 250 if (!log) 251 return 0; /* No mock data in this log */ 252 253 /* 254 * This check is technically not invalid per the specification AFAICS. 255 * (The host could 'guess' handles and clear them in order). 256 * However, this is not good behavior for the host so test it. 257 */ 258 if (log->clear_idx + pl->nr_recs > log->cur_idx) { 259 dev_err(cxlds->dev, 260 "Attempting to clear more events than returned!\n"); 261 return -EINVAL; 262 } 263 264 /* Check handle order prior to clearing events */ 265 for (nr = 0, handle = event_get_clear_handle(log); 266 nr < pl->nr_recs; 267 nr++, handle++) { 268 if (handle != le16_to_cpu(pl->handles[nr])) { 269 dev_err(cxlds->dev, "Clearing events out of order\n"); 270 return -EINVAL; 271 } 272 } 273 274 if (log->nr_overflow) 275 log->nr_overflow = 0; 276 277 /* Clear events */ 278 log->clear_idx += pl->nr_recs; 279 return 0; 280 } 281 282 static void cxl_mock_event_trigger(struct device *dev) 283 { 284 struct cxl_mockmem_data *mdata = dev_get_drvdata(dev); 285 struct mock_event_store *mes = &mdata->mes; 286 int i; 287 288 for (i = CXL_EVENT_TYPE_INFO; i < CXL_EVENT_TYPE_MAX; i++) { 289 struct mock_event_log *log; 290 291 log = event_find_log(dev, i); 292 if (log) 293 event_reset_log(log); 294 } 295 296 cxl_mem_get_event_records(mes->cxlds, mes->ev_status); 297 } 298 299 struct cxl_event_record_raw maint_needed = { 300 .hdr = { 301 .id = UUID_INIT(0xBA5EBA11, 0xABCD, 0xEFEB, 302 0xa5, 0x5a, 0xa5, 0x5a, 0xa5, 0xa5, 0x5a, 0xa5), 303 .length = sizeof(struct cxl_event_record_raw), 304 .flags[0] = CXL_EVENT_RECORD_FLAG_MAINT_NEEDED, 305 /* .handle = Set dynamically */ 306 .related_handle = cpu_to_le16(0xa5b6), 307 }, 308 .data = { 0xDE, 0xAD, 0xBE, 0xEF }, 309 }; 310 311 struct cxl_event_record_raw hardware_replace = { 312 .hdr = { 313 .id = UUID_INIT(0xABCDEFEB, 0xBA11, 0xBA5E, 314 0xa5, 0x5a, 0xa5, 0x5a, 0xa5, 0xa5, 0x5a, 0xa5), 315 .length = sizeof(struct cxl_event_record_raw), 316 .flags[0] = CXL_EVENT_RECORD_FLAG_HW_REPLACE, 317 /* .handle = Set dynamically */ 318 .related_handle = cpu_to_le16(0xb6a5), 319 }, 320 .data = { 0xDE, 0xAD, 0xBE, 0xEF }, 321 }; 322 323 struct cxl_event_gen_media gen_media = { 324 .hdr = { 325 .id = UUID_INIT(0xfbcd0a77, 0xc260, 0x417f, 326 0x85, 0xa9, 0x08, 0x8b, 0x16, 0x21, 0xeb, 0xa6), 327 .length = sizeof(struct cxl_event_gen_media), 328 .flags[0] = CXL_EVENT_RECORD_FLAG_PERMANENT, 329 /* .handle = Set dynamically */ 330 .related_handle = cpu_to_le16(0), 331 }, 332 .phys_addr = cpu_to_le64(0x2000), 333 .descriptor = CXL_GMER_EVT_DESC_UNCORECTABLE_EVENT, 334 .type = CXL_GMER_MEM_EVT_TYPE_DATA_PATH_ERROR, 335 .transaction_type = CXL_GMER_TRANS_HOST_WRITE, 336 /* .validity_flags = <set below> */ 337 .channel = 1, 338 .rank = 30 339 }; 340 341 struct cxl_event_dram dram = { 342 .hdr = { 343 .id = UUID_INIT(0x601dcbb3, 0x9c06, 0x4eab, 344 0xb8, 0xaf, 0x4e, 0x9b, 0xfb, 0x5c, 0x96, 0x24), 345 .length = sizeof(struct cxl_event_dram), 346 .flags[0] = CXL_EVENT_RECORD_FLAG_PERF_DEGRADED, 347 /* .handle = Set dynamically */ 348 .related_handle = cpu_to_le16(0), 349 }, 350 .phys_addr = cpu_to_le64(0x8000), 351 .descriptor = CXL_GMER_EVT_DESC_THRESHOLD_EVENT, 352 .type = CXL_GMER_MEM_EVT_TYPE_INV_ADDR, 353 .transaction_type = CXL_GMER_TRANS_INTERNAL_MEDIA_SCRUB, 354 /* .validity_flags = <set below> */ 355 .channel = 1, 356 .bank_group = 5, 357 .bank = 2, 358 .column = {0xDE, 0xAD}, 359 }; 360 361 struct cxl_event_mem_module mem_module = { 362 .hdr = { 363 .id = UUID_INIT(0xfe927475, 0xdd59, 0x4339, 364 0xa5, 0x86, 0x79, 0xba, 0xb1, 0x13, 0xb7, 0x74), 365 .length = sizeof(struct cxl_event_mem_module), 366 /* .handle = Set dynamically */ 367 .related_handle = cpu_to_le16(0), 368 }, 369 .event_type = CXL_MMER_TEMP_CHANGE, 370 .info = { 371 .health_status = CXL_DHI_HS_PERFORMANCE_DEGRADED, 372 .media_status = CXL_DHI_MS_ALL_DATA_LOST, 373 .add_status = (CXL_DHI_AS_CRITICAL << 2) | 374 (CXL_DHI_AS_WARNING << 4) | 375 (CXL_DHI_AS_WARNING << 5), 376 .device_temp = { 0xDE, 0xAD}, 377 .dirty_shutdown_cnt = { 0xde, 0xad, 0xbe, 0xef }, 378 .cor_vol_err_cnt = { 0xde, 0xad, 0xbe, 0xef }, 379 .cor_per_err_cnt = { 0xde, 0xad, 0xbe, 0xef }, 380 } 381 }; 382 383 static int mock_set_timestamp(struct cxl_dev_state *cxlds, 384 struct cxl_mbox_cmd *cmd) 385 { 386 struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev); 387 struct cxl_mbox_set_timestamp_in *ts = cmd->payload_in; 388 389 if (cmd->size_in != sizeof(*ts)) 390 return -EINVAL; 391 392 if (cmd->size_out != 0) 393 return -EINVAL; 394 395 mdata->timestamp = le64_to_cpu(ts->timestamp); 396 return 0; 397 } 398 399 static void cxl_mock_add_event_logs(struct mock_event_store *mes) 400 { 401 put_unaligned_le16(CXL_GMER_VALID_CHANNEL | CXL_GMER_VALID_RANK, 402 &gen_media.validity_flags); 403 404 put_unaligned_le16(CXL_DER_VALID_CHANNEL | CXL_DER_VALID_BANK_GROUP | 405 CXL_DER_VALID_BANK | CXL_DER_VALID_COLUMN, 406 &dram.validity_flags); 407 408 mes_add_event(mes, CXL_EVENT_TYPE_INFO, &maint_needed); 409 mes_add_event(mes, CXL_EVENT_TYPE_INFO, 410 (struct cxl_event_record_raw *)&gen_media); 411 mes_add_event(mes, CXL_EVENT_TYPE_INFO, 412 (struct cxl_event_record_raw *)&mem_module); 413 mes->ev_status |= CXLDEV_EVENT_STATUS_INFO; 414 415 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &maint_needed); 416 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace); 417 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, 418 (struct cxl_event_record_raw *)&dram); 419 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, 420 (struct cxl_event_record_raw *)&gen_media); 421 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, 422 (struct cxl_event_record_raw *)&mem_module); 423 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace); 424 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, 425 (struct cxl_event_record_raw *)&dram); 426 /* Overflow this log */ 427 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace); 428 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace); 429 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace); 430 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace); 431 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace); 432 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace); 433 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace); 434 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace); 435 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace); 436 mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace); 437 mes->ev_status |= CXLDEV_EVENT_STATUS_FAIL; 438 439 mes_add_event(mes, CXL_EVENT_TYPE_FATAL, &hardware_replace); 440 mes_add_event(mes, CXL_EVENT_TYPE_FATAL, 441 (struct cxl_event_record_raw *)&dram); 442 mes->ev_status |= CXLDEV_EVENT_STATUS_FATAL; 443 } 444 445 static int mock_gsl(struct cxl_mbox_cmd *cmd) 446 { 447 if (cmd->size_out < sizeof(mock_gsl_payload)) 448 return -EINVAL; 449 450 memcpy(cmd->payload_out, &mock_gsl_payload, sizeof(mock_gsl_payload)); 451 cmd->size_out = sizeof(mock_gsl_payload); 452 453 return 0; 454 } 455 456 static int mock_get_log(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd) 457 { 458 struct cxl_mbox_get_log *gl = cmd->payload_in; 459 u32 offset = le32_to_cpu(gl->offset); 460 u32 length = le32_to_cpu(gl->length); 461 uuid_t uuid = DEFINE_CXL_CEL_UUID; 462 void *data = &mock_cel; 463 464 if (cmd->size_in < sizeof(*gl)) 465 return -EINVAL; 466 if (length > cxlds->payload_size) 467 return -EINVAL; 468 if (offset + length > sizeof(mock_cel)) 469 return -EINVAL; 470 if (!uuid_equal(&gl->uuid, &uuid)) 471 return -EINVAL; 472 if (length > cmd->size_out) 473 return -EINVAL; 474 475 memcpy(cmd->payload_out, data + offset, length); 476 477 return 0; 478 } 479 480 static int mock_rcd_id(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd) 481 { 482 struct cxl_mbox_identify id = { 483 .fw_revision = { "mock fw v1 " }, 484 .total_capacity = 485 cpu_to_le64(DEV_SIZE / CXL_CAPACITY_MULTIPLIER), 486 .volatile_capacity = 487 cpu_to_le64(DEV_SIZE / CXL_CAPACITY_MULTIPLIER), 488 }; 489 490 if (cmd->size_out < sizeof(id)) 491 return -EINVAL; 492 493 memcpy(cmd->payload_out, &id, sizeof(id)); 494 495 return 0; 496 } 497 498 static int mock_id(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd) 499 { 500 struct cxl_mbox_identify id = { 501 .fw_revision = { "mock fw v1 " }, 502 .lsa_size = cpu_to_le32(LSA_SIZE), 503 .partition_align = 504 cpu_to_le64(SZ_256M / CXL_CAPACITY_MULTIPLIER), 505 .total_capacity = 506 cpu_to_le64(DEV_SIZE / CXL_CAPACITY_MULTIPLIER), 507 .inject_poison_limit = cpu_to_le16(MOCK_INJECT_TEST_MAX), 508 }; 509 510 put_unaligned_le24(CXL_POISON_LIST_MAX, id.poison_list_max_mer); 511 512 if (cmd->size_out < sizeof(id)) 513 return -EINVAL; 514 515 memcpy(cmd->payload_out, &id, sizeof(id)); 516 517 return 0; 518 } 519 520 static int mock_partition_info(struct cxl_dev_state *cxlds, 521 struct cxl_mbox_cmd *cmd) 522 { 523 struct cxl_mbox_get_partition_info pi = { 524 .active_volatile_cap = 525 cpu_to_le64(DEV_SIZE / 2 / CXL_CAPACITY_MULTIPLIER), 526 .active_persistent_cap = 527 cpu_to_le64(DEV_SIZE / 2 / CXL_CAPACITY_MULTIPLIER), 528 }; 529 530 if (cmd->size_out < sizeof(pi)) 531 return -EINVAL; 532 533 memcpy(cmd->payload_out, &pi, sizeof(pi)); 534 535 return 0; 536 } 537 538 static int mock_sanitize(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd) 539 { 540 struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev); 541 542 if (cmd->size_in != 0) 543 return -EINVAL; 544 545 if (cmd->size_out != 0) 546 return -EINVAL; 547 548 if (mdata->security_state & CXL_PMEM_SEC_STATE_USER_PASS_SET) { 549 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 550 return -ENXIO; 551 } 552 if (mdata->security_state & CXL_PMEM_SEC_STATE_LOCKED) { 553 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 554 return -ENXIO; 555 } 556 557 return 0; /* assume less than 2 secs, no bg */ 558 } 559 560 static int mock_get_security_state(struct cxl_dev_state *cxlds, 561 struct cxl_mbox_cmd *cmd) 562 { 563 struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev); 564 565 if (cmd->size_in) 566 return -EINVAL; 567 568 if (cmd->size_out != sizeof(u32)) 569 return -EINVAL; 570 571 memcpy(cmd->payload_out, &mdata->security_state, sizeof(u32)); 572 573 return 0; 574 } 575 576 static void master_plimit_check(struct cxl_mockmem_data *mdata) 577 { 578 if (mdata->master_limit == PASS_TRY_LIMIT) 579 return; 580 mdata->master_limit++; 581 if (mdata->master_limit == PASS_TRY_LIMIT) 582 mdata->security_state |= CXL_PMEM_SEC_STATE_MASTER_PLIMIT; 583 } 584 585 static void user_plimit_check(struct cxl_mockmem_data *mdata) 586 { 587 if (mdata->user_limit == PASS_TRY_LIMIT) 588 return; 589 mdata->user_limit++; 590 if (mdata->user_limit == PASS_TRY_LIMIT) 591 mdata->security_state |= CXL_PMEM_SEC_STATE_USER_PLIMIT; 592 } 593 594 static int mock_set_passphrase(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd) 595 { 596 struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev); 597 struct cxl_set_pass *set_pass; 598 599 if (cmd->size_in != sizeof(*set_pass)) 600 return -EINVAL; 601 602 if (cmd->size_out != 0) 603 return -EINVAL; 604 605 if (mdata->security_state & CXL_PMEM_SEC_STATE_FROZEN) { 606 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 607 return -ENXIO; 608 } 609 610 set_pass = cmd->payload_in; 611 switch (set_pass->type) { 612 case CXL_PMEM_SEC_PASS_MASTER: 613 if (mdata->security_state & CXL_PMEM_SEC_STATE_MASTER_PLIMIT) { 614 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 615 return -ENXIO; 616 } 617 /* 618 * CXL spec rev3.0 8.2.9.8.6.2, The master pasphrase shall only be set in 619 * the security disabled state when the user passphrase is not set. 620 */ 621 if (mdata->security_state & CXL_PMEM_SEC_STATE_USER_PASS_SET) { 622 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 623 return -ENXIO; 624 } 625 if (memcmp(mdata->master_pass, set_pass->old_pass, NVDIMM_PASSPHRASE_LEN)) { 626 master_plimit_check(mdata); 627 cmd->return_code = CXL_MBOX_CMD_RC_PASSPHRASE; 628 return -ENXIO; 629 } 630 memcpy(mdata->master_pass, set_pass->new_pass, NVDIMM_PASSPHRASE_LEN); 631 mdata->security_state |= CXL_PMEM_SEC_STATE_MASTER_PASS_SET; 632 return 0; 633 634 case CXL_PMEM_SEC_PASS_USER: 635 if (mdata->security_state & CXL_PMEM_SEC_STATE_USER_PLIMIT) { 636 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 637 return -ENXIO; 638 } 639 if (memcmp(mdata->user_pass, set_pass->old_pass, NVDIMM_PASSPHRASE_LEN)) { 640 user_plimit_check(mdata); 641 cmd->return_code = CXL_MBOX_CMD_RC_PASSPHRASE; 642 return -ENXIO; 643 } 644 memcpy(mdata->user_pass, set_pass->new_pass, NVDIMM_PASSPHRASE_LEN); 645 mdata->security_state |= CXL_PMEM_SEC_STATE_USER_PASS_SET; 646 return 0; 647 648 default: 649 cmd->return_code = CXL_MBOX_CMD_RC_INPUT; 650 } 651 return -EINVAL; 652 } 653 654 static int mock_disable_passphrase(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd) 655 { 656 struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev); 657 struct cxl_disable_pass *dis_pass; 658 659 if (cmd->size_in != sizeof(*dis_pass)) 660 return -EINVAL; 661 662 if (cmd->size_out != 0) 663 return -EINVAL; 664 665 if (mdata->security_state & CXL_PMEM_SEC_STATE_FROZEN) { 666 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 667 return -ENXIO; 668 } 669 670 dis_pass = cmd->payload_in; 671 switch (dis_pass->type) { 672 case CXL_PMEM_SEC_PASS_MASTER: 673 if (mdata->security_state & CXL_PMEM_SEC_STATE_MASTER_PLIMIT) { 674 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 675 return -ENXIO; 676 } 677 678 if (!(mdata->security_state & CXL_PMEM_SEC_STATE_MASTER_PASS_SET)) { 679 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 680 return -ENXIO; 681 } 682 683 if (memcmp(dis_pass->pass, mdata->master_pass, NVDIMM_PASSPHRASE_LEN)) { 684 master_plimit_check(mdata); 685 cmd->return_code = CXL_MBOX_CMD_RC_PASSPHRASE; 686 return -ENXIO; 687 } 688 689 mdata->master_limit = 0; 690 memset(mdata->master_pass, 0, NVDIMM_PASSPHRASE_LEN); 691 mdata->security_state &= ~CXL_PMEM_SEC_STATE_MASTER_PASS_SET; 692 return 0; 693 694 case CXL_PMEM_SEC_PASS_USER: 695 if (mdata->security_state & CXL_PMEM_SEC_STATE_USER_PLIMIT) { 696 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 697 return -ENXIO; 698 } 699 700 if (!(mdata->security_state & CXL_PMEM_SEC_STATE_USER_PASS_SET)) { 701 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 702 return -ENXIO; 703 } 704 705 if (memcmp(dis_pass->pass, mdata->user_pass, NVDIMM_PASSPHRASE_LEN)) { 706 user_plimit_check(mdata); 707 cmd->return_code = CXL_MBOX_CMD_RC_PASSPHRASE; 708 return -ENXIO; 709 } 710 711 mdata->user_limit = 0; 712 memset(mdata->user_pass, 0, NVDIMM_PASSPHRASE_LEN); 713 mdata->security_state &= ~(CXL_PMEM_SEC_STATE_USER_PASS_SET | 714 CXL_PMEM_SEC_STATE_LOCKED); 715 return 0; 716 717 default: 718 cmd->return_code = CXL_MBOX_CMD_RC_INPUT; 719 return -EINVAL; 720 } 721 722 return 0; 723 } 724 725 static int mock_freeze_security(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd) 726 { 727 struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev); 728 729 if (cmd->size_in != 0) 730 return -EINVAL; 731 732 if (cmd->size_out != 0) 733 return -EINVAL; 734 735 if (mdata->security_state & CXL_PMEM_SEC_STATE_FROZEN) 736 return 0; 737 738 mdata->security_state |= CXL_PMEM_SEC_STATE_FROZEN; 739 return 0; 740 } 741 742 static int mock_unlock_security(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd) 743 { 744 struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev); 745 746 if (cmd->size_in != NVDIMM_PASSPHRASE_LEN) 747 return -EINVAL; 748 749 if (cmd->size_out != 0) 750 return -EINVAL; 751 752 if (mdata->security_state & CXL_PMEM_SEC_STATE_FROZEN) { 753 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 754 return -ENXIO; 755 } 756 757 if (!(mdata->security_state & CXL_PMEM_SEC_STATE_USER_PASS_SET)) { 758 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 759 return -ENXIO; 760 } 761 762 if (mdata->security_state & CXL_PMEM_SEC_STATE_USER_PLIMIT) { 763 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 764 return -ENXIO; 765 } 766 767 if (!(mdata->security_state & CXL_PMEM_SEC_STATE_LOCKED)) { 768 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 769 return -ENXIO; 770 } 771 772 if (memcmp(cmd->payload_in, mdata->user_pass, NVDIMM_PASSPHRASE_LEN)) { 773 if (++mdata->user_limit == PASS_TRY_LIMIT) 774 mdata->security_state |= CXL_PMEM_SEC_STATE_USER_PLIMIT; 775 cmd->return_code = CXL_MBOX_CMD_RC_PASSPHRASE; 776 return -ENXIO; 777 } 778 779 mdata->user_limit = 0; 780 mdata->security_state &= ~CXL_PMEM_SEC_STATE_LOCKED; 781 return 0; 782 } 783 784 static int mock_passphrase_secure_erase(struct cxl_dev_state *cxlds, 785 struct cxl_mbox_cmd *cmd) 786 { 787 struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev); 788 struct cxl_pass_erase *erase; 789 790 if (cmd->size_in != sizeof(*erase)) 791 return -EINVAL; 792 793 if (cmd->size_out != 0) 794 return -EINVAL; 795 796 erase = cmd->payload_in; 797 if (mdata->security_state & CXL_PMEM_SEC_STATE_FROZEN) { 798 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 799 return -ENXIO; 800 } 801 802 if (mdata->security_state & CXL_PMEM_SEC_STATE_USER_PLIMIT && 803 erase->type == CXL_PMEM_SEC_PASS_USER) { 804 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 805 return -ENXIO; 806 } 807 808 if (mdata->security_state & CXL_PMEM_SEC_STATE_MASTER_PLIMIT && 809 erase->type == CXL_PMEM_SEC_PASS_MASTER) { 810 cmd->return_code = CXL_MBOX_CMD_RC_SECURITY; 811 return -ENXIO; 812 } 813 814 switch (erase->type) { 815 case CXL_PMEM_SEC_PASS_MASTER: 816 /* 817 * The spec does not clearly define the behavior of the scenario 818 * where a master passphrase is passed in while the master 819 * passphrase is not set and user passphrase is not set. The 820 * code will take the assumption that it will behave the same 821 * as a CXL secure erase command without passphrase (0x4401). 822 */ 823 if (mdata->security_state & CXL_PMEM_SEC_STATE_MASTER_PASS_SET) { 824 if (memcmp(mdata->master_pass, erase->pass, 825 NVDIMM_PASSPHRASE_LEN)) { 826 master_plimit_check(mdata); 827 cmd->return_code = CXL_MBOX_CMD_RC_PASSPHRASE; 828 return -ENXIO; 829 } 830 mdata->master_limit = 0; 831 mdata->user_limit = 0; 832 mdata->security_state &= ~CXL_PMEM_SEC_STATE_USER_PASS_SET; 833 memset(mdata->user_pass, 0, NVDIMM_PASSPHRASE_LEN); 834 mdata->security_state &= ~CXL_PMEM_SEC_STATE_LOCKED; 835 } else { 836 /* 837 * CXL rev3 8.2.9.8.6.3 Disable Passphrase 838 * When master passphrase is disabled, the device shall 839 * return Invalid Input for the Passphrase Secure Erase 840 * command with master passphrase. 841 */ 842 return -EINVAL; 843 } 844 /* Scramble encryption keys so that data is effectively erased */ 845 break; 846 case CXL_PMEM_SEC_PASS_USER: 847 /* 848 * The spec does not clearly define the behavior of the scenario 849 * where a user passphrase is passed in while the user 850 * passphrase is not set. The code will take the assumption that 851 * it will behave the same as a CXL secure erase command without 852 * passphrase (0x4401). 853 */ 854 if (mdata->security_state & CXL_PMEM_SEC_STATE_USER_PASS_SET) { 855 if (memcmp(mdata->user_pass, erase->pass, 856 NVDIMM_PASSPHRASE_LEN)) { 857 user_plimit_check(mdata); 858 cmd->return_code = CXL_MBOX_CMD_RC_PASSPHRASE; 859 return -ENXIO; 860 } 861 mdata->user_limit = 0; 862 mdata->security_state &= ~CXL_PMEM_SEC_STATE_USER_PASS_SET; 863 memset(mdata->user_pass, 0, NVDIMM_PASSPHRASE_LEN); 864 } 865 866 /* 867 * CXL rev3 Table 8-118 868 * If user passphrase is not set or supported by device, current 869 * passphrase value is ignored. Will make the assumption that 870 * the operation will proceed as secure erase w/o passphrase 871 * since spec is not explicit. 872 */ 873 874 /* Scramble encryption keys so that data is effectively erased */ 875 break; 876 default: 877 return -EINVAL; 878 } 879 880 return 0; 881 } 882 883 static int mock_get_lsa(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd) 884 { 885 struct cxl_mbox_get_lsa *get_lsa = cmd->payload_in; 886 struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev); 887 void *lsa = mdata->lsa; 888 u32 offset, length; 889 890 if (sizeof(*get_lsa) > cmd->size_in) 891 return -EINVAL; 892 offset = le32_to_cpu(get_lsa->offset); 893 length = le32_to_cpu(get_lsa->length); 894 if (offset + length > LSA_SIZE) 895 return -EINVAL; 896 if (length > cmd->size_out) 897 return -EINVAL; 898 899 memcpy(cmd->payload_out, lsa + offset, length); 900 return 0; 901 } 902 903 static int mock_set_lsa(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd) 904 { 905 struct cxl_mbox_set_lsa *set_lsa = cmd->payload_in; 906 struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev); 907 void *lsa = mdata->lsa; 908 u32 offset, length; 909 910 if (sizeof(*set_lsa) > cmd->size_in) 911 return -EINVAL; 912 offset = le32_to_cpu(set_lsa->offset); 913 length = cmd->size_in - sizeof(*set_lsa); 914 if (offset + length > LSA_SIZE) 915 return -EINVAL; 916 917 memcpy(lsa + offset, &set_lsa->data[0], length); 918 return 0; 919 } 920 921 static int mock_health_info(struct cxl_dev_state *cxlds, 922 struct cxl_mbox_cmd *cmd) 923 { 924 struct cxl_mbox_health_info health_info = { 925 /* set flags for maint needed, perf degraded, hw replacement */ 926 .health_status = 0x7, 927 /* set media status to "All Data Lost" */ 928 .media_status = 0x3, 929 /* 930 * set ext_status flags for: 931 * ext_life_used: normal, 932 * ext_temperature: critical, 933 * ext_corrected_volatile: warning, 934 * ext_corrected_persistent: normal, 935 */ 936 .ext_status = 0x18, 937 .life_used = 15, 938 .temperature = cpu_to_le16(25), 939 .dirty_shutdowns = cpu_to_le32(10), 940 .volatile_errors = cpu_to_le32(20), 941 .pmem_errors = cpu_to_le32(30), 942 }; 943 944 if (cmd->size_out < sizeof(health_info)) 945 return -EINVAL; 946 947 memcpy(cmd->payload_out, &health_info, sizeof(health_info)); 948 return 0; 949 } 950 951 static struct mock_poison { 952 struct cxl_dev_state *cxlds; 953 u64 dpa; 954 } mock_poison_list[MOCK_INJECT_TEST_MAX]; 955 956 static struct cxl_mbox_poison_out * 957 cxl_get_injected_po(struct cxl_dev_state *cxlds, u64 offset, u64 length) 958 { 959 struct cxl_mbox_poison_out *po; 960 int nr_records = 0; 961 u64 dpa; 962 963 po = kzalloc(struct_size(po, record, poison_inject_dev_max), GFP_KERNEL); 964 if (!po) 965 return NULL; 966 967 for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) { 968 if (mock_poison_list[i].cxlds != cxlds) 969 continue; 970 if (mock_poison_list[i].dpa < offset || 971 mock_poison_list[i].dpa > offset + length - 1) 972 continue; 973 974 dpa = mock_poison_list[i].dpa + CXL_POISON_SOURCE_INJECTED; 975 po->record[nr_records].address = cpu_to_le64(dpa); 976 po->record[nr_records].length = cpu_to_le32(1); 977 nr_records++; 978 if (nr_records == poison_inject_dev_max) 979 break; 980 } 981 982 /* Always return count, even when zero */ 983 po->count = cpu_to_le16(nr_records); 984 985 return po; 986 } 987 988 static int mock_get_poison(struct cxl_dev_state *cxlds, 989 struct cxl_mbox_cmd *cmd) 990 { 991 struct cxl_mbox_poison_in *pi = cmd->payload_in; 992 struct cxl_mbox_poison_out *po; 993 u64 offset = le64_to_cpu(pi->offset); 994 u64 length = le64_to_cpu(pi->length); 995 int nr_records; 996 997 po = cxl_get_injected_po(cxlds, offset, length); 998 if (!po) 999 return -ENOMEM; 1000 nr_records = le16_to_cpu(po->count); 1001 memcpy(cmd->payload_out, po, struct_size(po, record, nr_records)); 1002 cmd->size_out = struct_size(po, record, nr_records); 1003 kfree(po); 1004 1005 return 0; 1006 } 1007 1008 static bool mock_poison_dev_max_injected(struct cxl_dev_state *cxlds) 1009 { 1010 int count = 0; 1011 1012 for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) { 1013 if (mock_poison_list[i].cxlds == cxlds) 1014 count++; 1015 } 1016 return (count >= poison_inject_dev_max); 1017 } 1018 1019 static bool mock_poison_add(struct cxl_dev_state *cxlds, u64 dpa) 1020 { 1021 if (mock_poison_dev_max_injected(cxlds)) { 1022 dev_dbg(cxlds->dev, 1023 "Device poison injection limit has been reached: %d\n", 1024 MOCK_INJECT_DEV_MAX); 1025 return false; 1026 } 1027 1028 for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) { 1029 if (!mock_poison_list[i].cxlds) { 1030 mock_poison_list[i].cxlds = cxlds; 1031 mock_poison_list[i].dpa = dpa; 1032 return true; 1033 } 1034 } 1035 dev_dbg(cxlds->dev, 1036 "Mock test poison injection limit has been reached: %d\n", 1037 MOCK_INJECT_TEST_MAX); 1038 1039 return false; 1040 } 1041 1042 static bool mock_poison_found(struct cxl_dev_state *cxlds, u64 dpa) 1043 { 1044 for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) { 1045 if (mock_poison_list[i].cxlds == cxlds && 1046 mock_poison_list[i].dpa == dpa) 1047 return true; 1048 } 1049 return false; 1050 } 1051 1052 static int mock_inject_poison(struct cxl_dev_state *cxlds, 1053 struct cxl_mbox_cmd *cmd) 1054 { 1055 struct cxl_mbox_inject_poison *pi = cmd->payload_in; 1056 u64 dpa = le64_to_cpu(pi->address); 1057 1058 if (mock_poison_found(cxlds, dpa)) { 1059 /* Not an error to inject poison if already poisoned */ 1060 dev_dbg(cxlds->dev, "DPA: 0x%llx already poisoned\n", dpa); 1061 return 0; 1062 } 1063 if (!mock_poison_add(cxlds, dpa)) 1064 return -ENXIO; 1065 1066 return 0; 1067 } 1068 1069 static bool mock_poison_del(struct cxl_dev_state *cxlds, u64 dpa) 1070 { 1071 for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) { 1072 if (mock_poison_list[i].cxlds == cxlds && 1073 mock_poison_list[i].dpa == dpa) { 1074 mock_poison_list[i].cxlds = NULL; 1075 return true; 1076 } 1077 } 1078 return false; 1079 } 1080 1081 static int mock_clear_poison(struct cxl_dev_state *cxlds, 1082 struct cxl_mbox_cmd *cmd) 1083 { 1084 struct cxl_mbox_clear_poison *pi = cmd->payload_in; 1085 u64 dpa = le64_to_cpu(pi->address); 1086 1087 /* 1088 * A real CXL device will write pi->write_data to the address 1089 * being cleared. In this mock, just delete this address from 1090 * the mock poison list. 1091 */ 1092 if (!mock_poison_del(cxlds, dpa)) 1093 dev_dbg(cxlds->dev, "DPA: 0x%llx not in poison list\n", dpa); 1094 1095 return 0; 1096 } 1097 1098 static bool mock_poison_list_empty(void) 1099 { 1100 for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) { 1101 if (mock_poison_list[i].cxlds) 1102 return false; 1103 } 1104 return true; 1105 } 1106 1107 static ssize_t poison_inject_max_show(struct device_driver *drv, char *buf) 1108 { 1109 return sysfs_emit(buf, "%u\n", poison_inject_dev_max); 1110 } 1111 1112 static ssize_t poison_inject_max_store(struct device_driver *drv, 1113 const char *buf, size_t len) 1114 { 1115 int val; 1116 1117 if (kstrtoint(buf, 0, &val) < 0) 1118 return -EINVAL; 1119 1120 if (!mock_poison_list_empty()) 1121 return -EBUSY; 1122 1123 if (val <= MOCK_INJECT_TEST_MAX) 1124 poison_inject_dev_max = val; 1125 else 1126 return -EINVAL; 1127 1128 return len; 1129 } 1130 1131 static DRIVER_ATTR_RW(poison_inject_max); 1132 1133 static struct attribute *cxl_mock_mem_core_attrs[] = { 1134 &driver_attr_poison_inject_max.attr, 1135 NULL 1136 }; 1137 ATTRIBUTE_GROUPS(cxl_mock_mem_core); 1138 1139 static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd) 1140 { 1141 struct device *dev = cxlds->dev; 1142 int rc = -EIO; 1143 1144 switch (cmd->opcode) { 1145 case CXL_MBOX_OP_SET_TIMESTAMP: 1146 rc = mock_set_timestamp(cxlds, cmd); 1147 break; 1148 case CXL_MBOX_OP_GET_SUPPORTED_LOGS: 1149 rc = mock_gsl(cmd); 1150 break; 1151 case CXL_MBOX_OP_GET_LOG: 1152 rc = mock_get_log(cxlds, cmd); 1153 break; 1154 case CXL_MBOX_OP_IDENTIFY: 1155 if (cxlds->rcd) 1156 rc = mock_rcd_id(cxlds, cmd); 1157 else 1158 rc = mock_id(cxlds, cmd); 1159 break; 1160 case CXL_MBOX_OP_GET_LSA: 1161 rc = mock_get_lsa(cxlds, cmd); 1162 break; 1163 case CXL_MBOX_OP_GET_PARTITION_INFO: 1164 rc = mock_partition_info(cxlds, cmd); 1165 break; 1166 case CXL_MBOX_OP_GET_EVENT_RECORD: 1167 rc = mock_get_event(cxlds, cmd); 1168 break; 1169 case CXL_MBOX_OP_CLEAR_EVENT_RECORD: 1170 rc = mock_clear_event(cxlds, cmd); 1171 break; 1172 case CXL_MBOX_OP_SET_LSA: 1173 rc = mock_set_lsa(cxlds, cmd); 1174 break; 1175 case CXL_MBOX_OP_GET_HEALTH_INFO: 1176 rc = mock_health_info(cxlds, cmd); 1177 break; 1178 case CXL_MBOX_OP_SANITIZE: 1179 rc = mock_sanitize(cxlds, cmd); 1180 break; 1181 case CXL_MBOX_OP_GET_SECURITY_STATE: 1182 rc = mock_get_security_state(cxlds, cmd); 1183 break; 1184 case CXL_MBOX_OP_SET_PASSPHRASE: 1185 rc = mock_set_passphrase(cxlds, cmd); 1186 break; 1187 case CXL_MBOX_OP_DISABLE_PASSPHRASE: 1188 rc = mock_disable_passphrase(cxlds, cmd); 1189 break; 1190 case CXL_MBOX_OP_FREEZE_SECURITY: 1191 rc = mock_freeze_security(cxlds, cmd); 1192 break; 1193 case CXL_MBOX_OP_UNLOCK: 1194 rc = mock_unlock_security(cxlds, cmd); 1195 break; 1196 case CXL_MBOX_OP_PASSPHRASE_SECURE_ERASE: 1197 rc = mock_passphrase_secure_erase(cxlds, cmd); 1198 break; 1199 case CXL_MBOX_OP_GET_POISON: 1200 rc = mock_get_poison(cxlds, cmd); 1201 break; 1202 case CXL_MBOX_OP_INJECT_POISON: 1203 rc = mock_inject_poison(cxlds, cmd); 1204 break; 1205 case CXL_MBOX_OP_CLEAR_POISON: 1206 rc = mock_clear_poison(cxlds, cmd); 1207 break; 1208 default: 1209 break; 1210 } 1211 1212 dev_dbg(dev, "opcode: %#x sz_in: %zd sz_out: %zd rc: %d\n", cmd->opcode, 1213 cmd->size_in, cmd->size_out, rc); 1214 1215 return rc; 1216 } 1217 1218 static void label_area_release(void *lsa) 1219 { 1220 vfree(lsa); 1221 } 1222 1223 static bool is_rcd(struct platform_device *pdev) 1224 { 1225 const struct platform_device_id *id = platform_get_device_id(pdev); 1226 1227 return !!id->driver_data; 1228 } 1229 1230 static ssize_t event_trigger_store(struct device *dev, 1231 struct device_attribute *attr, 1232 const char *buf, size_t count) 1233 { 1234 cxl_mock_event_trigger(dev); 1235 return count; 1236 } 1237 static DEVICE_ATTR_WO(event_trigger); 1238 1239 static int cxl_mock_mem_probe(struct platform_device *pdev) 1240 { 1241 struct device *dev = &pdev->dev; 1242 struct cxl_memdev *cxlmd; 1243 struct cxl_dev_state *cxlds; 1244 struct cxl_mockmem_data *mdata; 1245 int rc; 1246 1247 mdata = devm_kzalloc(dev, sizeof(*mdata), GFP_KERNEL); 1248 if (!mdata) 1249 return -ENOMEM; 1250 dev_set_drvdata(dev, mdata); 1251 1252 mdata->lsa = vmalloc(LSA_SIZE); 1253 if (!mdata->lsa) 1254 return -ENOMEM; 1255 rc = devm_add_action_or_reset(dev, label_area_release, mdata->lsa); 1256 if (rc) 1257 return rc; 1258 1259 cxlds = cxl_dev_state_create(dev); 1260 if (IS_ERR(cxlds)) 1261 return PTR_ERR(cxlds); 1262 1263 cxlds->serial = pdev->id; 1264 cxlds->mbox_send = cxl_mock_mbox_send; 1265 cxlds->payload_size = SZ_4K; 1266 cxlds->event.buf = (struct cxl_get_event_payload *) mdata->event_buf; 1267 if (is_rcd(pdev)) { 1268 cxlds->rcd = true; 1269 cxlds->component_reg_phys = CXL_RESOURCE_NONE; 1270 } 1271 1272 rc = cxl_enumerate_cmds(cxlds); 1273 if (rc) 1274 return rc; 1275 1276 rc = cxl_poison_state_init(cxlds); 1277 if (rc) 1278 return rc; 1279 1280 rc = cxl_set_timestamp(cxlds); 1281 if (rc) 1282 return rc; 1283 1284 cxlds->media_ready = true; 1285 rc = cxl_dev_state_identify(cxlds); 1286 if (rc) 1287 return rc; 1288 1289 rc = cxl_mem_create_range_info(cxlds); 1290 if (rc) 1291 return rc; 1292 1293 mdata->mes.cxlds = cxlds; 1294 cxl_mock_add_event_logs(&mdata->mes); 1295 1296 cxlmd = devm_cxl_add_memdev(cxlds); 1297 if (IS_ERR(cxlmd)) 1298 return PTR_ERR(cxlmd); 1299 1300 cxl_mem_get_event_records(cxlds, CXLDEV_EVENT_STATUS_ALL); 1301 1302 return 0; 1303 } 1304 1305 static ssize_t security_lock_show(struct device *dev, 1306 struct device_attribute *attr, char *buf) 1307 { 1308 struct cxl_mockmem_data *mdata = dev_get_drvdata(dev); 1309 1310 return sysfs_emit(buf, "%u\n", 1311 !!(mdata->security_state & CXL_PMEM_SEC_STATE_LOCKED)); 1312 } 1313 1314 static ssize_t security_lock_store(struct device *dev, struct device_attribute *attr, 1315 const char *buf, size_t count) 1316 { 1317 struct cxl_mockmem_data *mdata = dev_get_drvdata(dev); 1318 u32 mask = CXL_PMEM_SEC_STATE_FROZEN | CXL_PMEM_SEC_STATE_USER_PLIMIT | 1319 CXL_PMEM_SEC_STATE_MASTER_PLIMIT; 1320 int val; 1321 1322 if (kstrtoint(buf, 0, &val) < 0) 1323 return -EINVAL; 1324 1325 if (val == 1) { 1326 if (!(mdata->security_state & CXL_PMEM_SEC_STATE_USER_PASS_SET)) 1327 return -ENXIO; 1328 mdata->security_state |= CXL_PMEM_SEC_STATE_LOCKED; 1329 mdata->security_state &= ~mask; 1330 } else { 1331 return -EINVAL; 1332 } 1333 return count; 1334 } 1335 1336 static DEVICE_ATTR_RW(security_lock); 1337 1338 static struct attribute *cxl_mock_mem_attrs[] = { 1339 &dev_attr_security_lock.attr, 1340 &dev_attr_event_trigger.attr, 1341 NULL 1342 }; 1343 ATTRIBUTE_GROUPS(cxl_mock_mem); 1344 1345 static const struct platform_device_id cxl_mock_mem_ids[] = { 1346 { .name = "cxl_mem", 0 }, 1347 { .name = "cxl_rcd", 1 }, 1348 { }, 1349 }; 1350 MODULE_DEVICE_TABLE(platform, cxl_mock_mem_ids); 1351 1352 static struct platform_driver cxl_mock_mem_driver = { 1353 .probe = cxl_mock_mem_probe, 1354 .id_table = cxl_mock_mem_ids, 1355 .driver = { 1356 .name = KBUILD_MODNAME, 1357 .dev_groups = cxl_mock_mem_groups, 1358 .groups = cxl_mock_mem_core_groups, 1359 }, 1360 }; 1361 1362 module_platform_driver(cxl_mock_mem_driver); 1363 MODULE_LICENSE("GPL v2"); 1364 MODULE_IMPORT_NS(CXL); 1365