1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2015, Linaro Limited 4 */ 5 6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 7 8 #include <linux/arm-smccc.h> 9 #include <linux/errno.h> 10 #include <linux/io.h> 11 #include <linux/module.h> 12 #include <linux/of.h> 13 #include <linux/of_platform.h> 14 #include <linux/platform_device.h> 15 #include <linux/slab.h> 16 #include <linux/string.h> 17 #include <linux/tee_drv.h> 18 #include <linux/types.h> 19 #include <linux/uaccess.h> 20 #include <linux/workqueue.h> 21 #include "optee_private.h" 22 #include "optee_smc.h" 23 #include "shm_pool.h" 24 25 #define DRIVER_NAME "optee" 26 27 #define OPTEE_SHM_NUM_PRIV_PAGES CONFIG_OPTEE_SHM_NUM_PRIV_PAGES 28 29 /** 30 * optee_from_msg_param() - convert from OPTEE_MSG parameters to 31 * struct tee_param 32 * @params: subsystem internal parameter representation 33 * @num_params: number of elements in the parameter arrays 34 * @msg_params: OPTEE_MSG parameters 35 * Returns 0 on success or <0 on failure 36 */ 37 int optee_from_msg_param(struct tee_param *params, size_t num_params, 38 const struct optee_msg_param *msg_params) 39 { 40 int rc; 41 size_t n; 42 struct tee_shm *shm; 43 phys_addr_t pa; 44 45 for (n = 0; n < num_params; n++) { 46 struct tee_param *p = params + n; 47 const struct optee_msg_param *mp = msg_params + n; 48 u32 attr = mp->attr & OPTEE_MSG_ATTR_TYPE_MASK; 49 50 switch (attr) { 51 case OPTEE_MSG_ATTR_TYPE_NONE: 52 p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE; 53 memset(&p->u, 0, sizeof(p->u)); 54 break; 55 case OPTEE_MSG_ATTR_TYPE_VALUE_INPUT: 56 case OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT: 57 case OPTEE_MSG_ATTR_TYPE_VALUE_INOUT: 58 p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT + 59 attr - OPTEE_MSG_ATTR_TYPE_VALUE_INPUT; 60 p->u.value.a = mp->u.value.a; 61 p->u.value.b = mp->u.value.b; 62 p->u.value.c = mp->u.value.c; 63 break; 64 case OPTEE_MSG_ATTR_TYPE_TMEM_INPUT: 65 case OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT: 66 case OPTEE_MSG_ATTR_TYPE_TMEM_INOUT: 67 p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT + 68 attr - OPTEE_MSG_ATTR_TYPE_TMEM_INPUT; 69 p->u.memref.size = mp->u.tmem.size; 70 shm = (struct tee_shm *)(unsigned long) 71 mp->u.tmem.shm_ref; 72 if (!shm) { 73 p->u.memref.shm_offs = 0; 74 p->u.memref.shm = NULL; 75 break; 76 } 77 rc = tee_shm_get_pa(shm, 0, &pa); 78 if (rc) 79 return rc; 80 p->u.memref.shm_offs = mp->u.tmem.buf_ptr - pa; 81 p->u.memref.shm = shm; 82 break; 83 case OPTEE_MSG_ATTR_TYPE_RMEM_INPUT: 84 case OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT: 85 case OPTEE_MSG_ATTR_TYPE_RMEM_INOUT: 86 p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT + 87 attr - OPTEE_MSG_ATTR_TYPE_RMEM_INPUT; 88 p->u.memref.size = mp->u.rmem.size; 89 shm = (struct tee_shm *)(unsigned long) 90 mp->u.rmem.shm_ref; 91 92 if (!shm) { 93 p->u.memref.shm_offs = 0; 94 p->u.memref.shm = NULL; 95 break; 96 } 97 p->u.memref.shm_offs = mp->u.rmem.offs; 98 p->u.memref.shm = shm; 99 100 break; 101 102 default: 103 return -EINVAL; 104 } 105 } 106 return 0; 107 } 108 109 static int to_msg_param_tmp_mem(struct optee_msg_param *mp, 110 const struct tee_param *p) 111 { 112 int rc; 113 phys_addr_t pa; 114 115 mp->attr = OPTEE_MSG_ATTR_TYPE_TMEM_INPUT + p->attr - 116 TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT; 117 118 mp->u.tmem.shm_ref = (unsigned long)p->u.memref.shm; 119 mp->u.tmem.size = p->u.memref.size; 120 121 if (!p->u.memref.shm) { 122 mp->u.tmem.buf_ptr = 0; 123 return 0; 124 } 125 126 rc = tee_shm_get_pa(p->u.memref.shm, p->u.memref.shm_offs, &pa); 127 if (rc) 128 return rc; 129 130 mp->u.tmem.buf_ptr = pa; 131 mp->attr |= OPTEE_MSG_ATTR_CACHE_PREDEFINED << 132 OPTEE_MSG_ATTR_CACHE_SHIFT; 133 134 return 0; 135 } 136 137 static int to_msg_param_reg_mem(struct optee_msg_param *mp, 138 const struct tee_param *p) 139 { 140 mp->attr = OPTEE_MSG_ATTR_TYPE_RMEM_INPUT + p->attr - 141 TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT; 142 143 mp->u.rmem.shm_ref = (unsigned long)p->u.memref.shm; 144 mp->u.rmem.size = p->u.memref.size; 145 mp->u.rmem.offs = p->u.memref.shm_offs; 146 return 0; 147 } 148 149 /** 150 * optee_to_msg_param() - convert from struct tee_params to OPTEE_MSG parameters 151 * @msg_params: OPTEE_MSG parameters 152 * @num_params: number of elements in the parameter arrays 153 * @params: subsystem itnernal parameter representation 154 * Returns 0 on success or <0 on failure 155 */ 156 int optee_to_msg_param(struct optee_msg_param *msg_params, size_t num_params, 157 const struct tee_param *params) 158 { 159 int rc; 160 size_t n; 161 162 for (n = 0; n < num_params; n++) { 163 const struct tee_param *p = params + n; 164 struct optee_msg_param *mp = msg_params + n; 165 166 switch (p->attr) { 167 case TEE_IOCTL_PARAM_ATTR_TYPE_NONE: 168 mp->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE; 169 memset(&mp->u, 0, sizeof(mp->u)); 170 break; 171 case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT: 172 case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT: 173 case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT: 174 mp->attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT + p->attr - 175 TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT; 176 mp->u.value.a = p->u.value.a; 177 mp->u.value.b = p->u.value.b; 178 mp->u.value.c = p->u.value.c; 179 break; 180 case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT: 181 case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT: 182 case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT: 183 if (tee_shm_is_registered(p->u.memref.shm)) 184 rc = to_msg_param_reg_mem(mp, p); 185 else 186 rc = to_msg_param_tmp_mem(mp, p); 187 if (rc) 188 return rc; 189 break; 190 default: 191 return -EINVAL; 192 } 193 } 194 return 0; 195 } 196 197 static void optee_get_version(struct tee_device *teedev, 198 struct tee_ioctl_version_data *vers) 199 { 200 struct tee_ioctl_version_data v = { 201 .impl_id = TEE_IMPL_ID_OPTEE, 202 .impl_caps = TEE_OPTEE_CAP_TZ, 203 .gen_caps = TEE_GEN_CAP_GP, 204 }; 205 struct optee *optee = tee_get_drvdata(teedev); 206 207 if (optee->sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM) 208 v.gen_caps |= TEE_GEN_CAP_REG_MEM; 209 if (optee->sec_caps & OPTEE_SMC_SEC_CAP_MEMREF_NULL) 210 v.gen_caps |= TEE_GEN_CAP_MEMREF_NULL; 211 *vers = v; 212 } 213 214 static void optee_bus_scan(struct work_struct *work) 215 { 216 WARN_ON(optee_enumerate_devices(PTA_CMD_GET_DEVICES_SUPP)); 217 } 218 219 static int optee_open(struct tee_context *ctx) 220 { 221 struct optee_context_data *ctxdata; 222 struct tee_device *teedev = ctx->teedev; 223 struct optee *optee = tee_get_drvdata(teedev); 224 225 ctxdata = kzalloc(sizeof(*ctxdata), GFP_KERNEL); 226 if (!ctxdata) 227 return -ENOMEM; 228 229 if (teedev == optee->supp_teedev) { 230 bool busy = true; 231 232 mutex_lock(&optee->supp.mutex); 233 if (!optee->supp.ctx) { 234 busy = false; 235 optee->supp.ctx = ctx; 236 } 237 mutex_unlock(&optee->supp.mutex); 238 if (busy) { 239 kfree(ctxdata); 240 return -EBUSY; 241 } 242 243 if (!optee->scan_bus_done) { 244 INIT_WORK(&optee->scan_bus_work, optee_bus_scan); 245 optee->scan_bus_wq = create_workqueue("optee_bus_scan"); 246 if (!optee->scan_bus_wq) { 247 kfree(ctxdata); 248 return -ECHILD; 249 } 250 queue_work(optee->scan_bus_wq, &optee->scan_bus_work); 251 optee->scan_bus_done = true; 252 } 253 } 254 mutex_init(&ctxdata->mutex); 255 INIT_LIST_HEAD(&ctxdata->sess_list); 256 257 if (optee->sec_caps & OPTEE_SMC_SEC_CAP_MEMREF_NULL) 258 ctx->cap_memref_null = true; 259 else 260 ctx->cap_memref_null = false; 261 262 ctx->data = ctxdata; 263 return 0; 264 } 265 266 static void optee_release(struct tee_context *ctx) 267 { 268 struct optee_context_data *ctxdata = ctx->data; 269 struct tee_device *teedev = ctx->teedev; 270 struct optee *optee = tee_get_drvdata(teedev); 271 struct tee_shm *shm; 272 struct optee_msg_arg *arg = NULL; 273 phys_addr_t parg; 274 struct optee_session *sess; 275 struct optee_session *sess_tmp; 276 277 if (!ctxdata) 278 return; 279 280 shm = tee_shm_alloc(ctx, sizeof(struct optee_msg_arg), TEE_SHM_MAPPED); 281 if (!IS_ERR(shm)) { 282 arg = tee_shm_get_va(shm, 0); 283 /* 284 * If va2pa fails for some reason, we can't call into 285 * secure world, only free the memory. Secure OS will leak 286 * sessions and finally refuse more sessions, but we will 287 * at least let normal world reclaim its memory. 288 */ 289 if (!IS_ERR(arg)) 290 if (tee_shm_va2pa(shm, arg, &parg)) 291 arg = NULL; /* prevent usage of parg below */ 292 } 293 294 list_for_each_entry_safe(sess, sess_tmp, &ctxdata->sess_list, 295 list_node) { 296 list_del(&sess->list_node); 297 if (!IS_ERR_OR_NULL(arg)) { 298 memset(arg, 0, sizeof(*arg)); 299 arg->cmd = OPTEE_MSG_CMD_CLOSE_SESSION; 300 arg->session = sess->session_id; 301 optee_do_call_with_arg(ctx, parg); 302 } 303 kfree(sess); 304 } 305 kfree(ctxdata); 306 307 if (!IS_ERR(shm)) 308 tee_shm_free(shm); 309 310 ctx->data = NULL; 311 312 if (teedev == optee->supp_teedev) { 313 if (optee->scan_bus_wq) { 314 destroy_workqueue(optee->scan_bus_wq); 315 optee->scan_bus_wq = NULL; 316 } 317 optee_supp_release(&optee->supp); 318 } 319 } 320 321 static const struct tee_driver_ops optee_ops = { 322 .get_version = optee_get_version, 323 .open = optee_open, 324 .release = optee_release, 325 .open_session = optee_open_session, 326 .close_session = optee_close_session, 327 .invoke_func = optee_invoke_func, 328 .cancel_req = optee_cancel_req, 329 .shm_register = optee_shm_register, 330 .shm_unregister = optee_shm_unregister, 331 }; 332 333 static const struct tee_desc optee_desc = { 334 .name = DRIVER_NAME "-clnt", 335 .ops = &optee_ops, 336 .owner = THIS_MODULE, 337 }; 338 339 static const struct tee_driver_ops optee_supp_ops = { 340 .get_version = optee_get_version, 341 .open = optee_open, 342 .release = optee_release, 343 .supp_recv = optee_supp_recv, 344 .supp_send = optee_supp_send, 345 .shm_register = optee_shm_register_supp, 346 .shm_unregister = optee_shm_unregister_supp, 347 }; 348 349 static const struct tee_desc optee_supp_desc = { 350 .name = DRIVER_NAME "-supp", 351 .ops = &optee_supp_ops, 352 .owner = THIS_MODULE, 353 .flags = TEE_DESC_PRIVILEGED, 354 }; 355 356 static bool optee_msg_api_uid_is_optee_api(optee_invoke_fn *invoke_fn) 357 { 358 struct arm_smccc_res res; 359 360 invoke_fn(OPTEE_SMC_CALLS_UID, 0, 0, 0, 0, 0, 0, 0, &res); 361 362 if (res.a0 == OPTEE_MSG_UID_0 && res.a1 == OPTEE_MSG_UID_1 && 363 res.a2 == OPTEE_MSG_UID_2 && res.a3 == OPTEE_MSG_UID_3) 364 return true; 365 return false; 366 } 367 368 static void optee_msg_get_os_revision(optee_invoke_fn *invoke_fn) 369 { 370 union { 371 struct arm_smccc_res smccc; 372 struct optee_smc_call_get_os_revision_result result; 373 } res = { 374 .result = { 375 .build_id = 0 376 } 377 }; 378 379 invoke_fn(OPTEE_SMC_CALL_GET_OS_REVISION, 0, 0, 0, 0, 0, 0, 0, 380 &res.smccc); 381 382 if (res.result.build_id) 383 pr_info("revision %lu.%lu (%08lx)", res.result.major, 384 res.result.minor, res.result.build_id); 385 else 386 pr_info("revision %lu.%lu", res.result.major, res.result.minor); 387 } 388 389 static bool optee_msg_api_revision_is_compatible(optee_invoke_fn *invoke_fn) 390 { 391 union { 392 struct arm_smccc_res smccc; 393 struct optee_smc_calls_revision_result result; 394 } res; 395 396 invoke_fn(OPTEE_SMC_CALLS_REVISION, 0, 0, 0, 0, 0, 0, 0, &res.smccc); 397 398 if (res.result.major == OPTEE_MSG_REVISION_MAJOR && 399 (int)res.result.minor >= OPTEE_MSG_REVISION_MINOR) 400 return true; 401 return false; 402 } 403 404 static bool optee_msg_exchange_capabilities(optee_invoke_fn *invoke_fn, 405 u32 *sec_caps) 406 { 407 union { 408 struct arm_smccc_res smccc; 409 struct optee_smc_exchange_capabilities_result result; 410 } res; 411 u32 a1 = 0; 412 413 /* 414 * TODO This isn't enough to tell if it's UP system (from kernel 415 * point of view) or not, is_smp() returns the the information 416 * needed, but can't be called directly from here. 417 */ 418 if (!IS_ENABLED(CONFIG_SMP) || nr_cpu_ids == 1) 419 a1 |= OPTEE_SMC_NSEC_CAP_UNIPROCESSOR; 420 421 invoke_fn(OPTEE_SMC_EXCHANGE_CAPABILITIES, a1, 0, 0, 0, 0, 0, 0, 422 &res.smccc); 423 424 if (res.result.status != OPTEE_SMC_RETURN_OK) 425 return false; 426 427 *sec_caps = res.result.capabilities; 428 return true; 429 } 430 431 static struct tee_shm_pool *optee_config_dyn_shm(void) 432 { 433 struct tee_shm_pool_mgr *priv_mgr; 434 struct tee_shm_pool_mgr *dmabuf_mgr; 435 void *rc; 436 437 rc = optee_shm_pool_alloc_pages(); 438 if (IS_ERR(rc)) 439 return rc; 440 priv_mgr = rc; 441 442 rc = optee_shm_pool_alloc_pages(); 443 if (IS_ERR(rc)) { 444 tee_shm_pool_mgr_destroy(priv_mgr); 445 return rc; 446 } 447 dmabuf_mgr = rc; 448 449 rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr); 450 if (IS_ERR(rc)) { 451 tee_shm_pool_mgr_destroy(priv_mgr); 452 tee_shm_pool_mgr_destroy(dmabuf_mgr); 453 } 454 455 return rc; 456 } 457 458 static struct tee_shm_pool * 459 optee_config_shm_memremap(optee_invoke_fn *invoke_fn, void **memremaped_shm) 460 { 461 union { 462 struct arm_smccc_res smccc; 463 struct optee_smc_get_shm_config_result result; 464 } res; 465 unsigned long vaddr; 466 phys_addr_t paddr; 467 size_t size; 468 phys_addr_t begin; 469 phys_addr_t end; 470 void *va; 471 struct tee_shm_pool_mgr *priv_mgr; 472 struct tee_shm_pool_mgr *dmabuf_mgr; 473 void *rc; 474 const int sz = OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE; 475 476 invoke_fn(OPTEE_SMC_GET_SHM_CONFIG, 0, 0, 0, 0, 0, 0, 0, &res.smccc); 477 if (res.result.status != OPTEE_SMC_RETURN_OK) { 478 pr_err("static shm service not available\n"); 479 return ERR_PTR(-ENOENT); 480 } 481 482 if (res.result.settings != OPTEE_SMC_SHM_CACHED) { 483 pr_err("only normal cached shared memory supported\n"); 484 return ERR_PTR(-EINVAL); 485 } 486 487 begin = roundup(res.result.start, PAGE_SIZE); 488 end = rounddown(res.result.start + res.result.size, PAGE_SIZE); 489 paddr = begin; 490 size = end - begin; 491 492 if (size < 2 * OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE) { 493 pr_err("too small shared memory area\n"); 494 return ERR_PTR(-EINVAL); 495 } 496 497 va = memremap(paddr, size, MEMREMAP_WB); 498 if (!va) { 499 pr_err("shared memory ioremap failed\n"); 500 return ERR_PTR(-EINVAL); 501 } 502 vaddr = (unsigned long)va; 503 504 rc = tee_shm_pool_mgr_alloc_res_mem(vaddr, paddr, sz, 505 3 /* 8 bytes aligned */); 506 if (IS_ERR(rc)) 507 goto err_memunmap; 508 priv_mgr = rc; 509 510 vaddr += sz; 511 paddr += sz; 512 size -= sz; 513 514 rc = tee_shm_pool_mgr_alloc_res_mem(vaddr, paddr, size, PAGE_SHIFT); 515 if (IS_ERR(rc)) 516 goto err_free_priv_mgr; 517 dmabuf_mgr = rc; 518 519 rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr); 520 if (IS_ERR(rc)) 521 goto err_free_dmabuf_mgr; 522 523 *memremaped_shm = va; 524 525 return rc; 526 527 err_free_dmabuf_mgr: 528 tee_shm_pool_mgr_destroy(dmabuf_mgr); 529 err_free_priv_mgr: 530 tee_shm_pool_mgr_destroy(priv_mgr); 531 err_memunmap: 532 memunmap(va); 533 return rc; 534 } 535 536 /* Simple wrapper functions to be able to use a function pointer */ 537 static void optee_smccc_smc(unsigned long a0, unsigned long a1, 538 unsigned long a2, unsigned long a3, 539 unsigned long a4, unsigned long a5, 540 unsigned long a6, unsigned long a7, 541 struct arm_smccc_res *res) 542 { 543 arm_smccc_smc(a0, a1, a2, a3, a4, a5, a6, a7, res); 544 } 545 546 static void optee_smccc_hvc(unsigned long a0, unsigned long a1, 547 unsigned long a2, unsigned long a3, 548 unsigned long a4, unsigned long a5, 549 unsigned long a6, unsigned long a7, 550 struct arm_smccc_res *res) 551 { 552 arm_smccc_hvc(a0, a1, a2, a3, a4, a5, a6, a7, res); 553 } 554 555 static optee_invoke_fn *get_invoke_func(struct device *dev) 556 { 557 const char *method; 558 559 pr_info("probing for conduit method.\n"); 560 561 if (device_property_read_string(dev, "method", &method)) { 562 pr_warn("missing \"method\" property\n"); 563 return ERR_PTR(-ENXIO); 564 } 565 566 if (!strcmp("hvc", method)) 567 return optee_smccc_hvc; 568 else if (!strcmp("smc", method)) 569 return optee_smccc_smc; 570 571 pr_warn("invalid \"method\" property: %s\n", method); 572 return ERR_PTR(-EINVAL); 573 } 574 575 static int optee_remove(struct platform_device *pdev) 576 { 577 struct optee *optee = platform_get_drvdata(pdev); 578 579 /* 580 * Ask OP-TEE to free all cached shared memory objects to decrease 581 * reference counters and also avoid wild pointers in secure world 582 * into the old shared memory range. 583 */ 584 optee_disable_shm_cache(optee); 585 586 /* 587 * The two devices have to be unregistered before we can free the 588 * other resources. 589 */ 590 tee_device_unregister(optee->supp_teedev); 591 tee_device_unregister(optee->teedev); 592 593 tee_shm_pool_free(optee->pool); 594 if (optee->memremaped_shm) 595 memunmap(optee->memremaped_shm); 596 optee_wait_queue_exit(&optee->wait_queue); 597 optee_supp_uninit(&optee->supp); 598 mutex_destroy(&optee->call_queue.mutex); 599 600 kfree(optee); 601 602 return 0; 603 } 604 605 static int optee_probe(struct platform_device *pdev) 606 { 607 optee_invoke_fn *invoke_fn; 608 struct tee_shm_pool *pool = ERR_PTR(-EINVAL); 609 struct optee *optee = NULL; 610 void *memremaped_shm = NULL; 611 struct tee_device *teedev; 612 u32 sec_caps; 613 int rc; 614 615 invoke_fn = get_invoke_func(&pdev->dev); 616 if (IS_ERR(invoke_fn)) 617 return PTR_ERR(invoke_fn); 618 619 if (!optee_msg_api_uid_is_optee_api(invoke_fn)) { 620 pr_warn("api uid mismatch\n"); 621 return -EINVAL; 622 } 623 624 optee_msg_get_os_revision(invoke_fn); 625 626 if (!optee_msg_api_revision_is_compatible(invoke_fn)) { 627 pr_warn("api revision mismatch\n"); 628 return -EINVAL; 629 } 630 631 if (!optee_msg_exchange_capabilities(invoke_fn, &sec_caps)) { 632 pr_warn("capabilities mismatch\n"); 633 return -EINVAL; 634 } 635 636 /* 637 * Try to use dynamic shared memory if possible 638 */ 639 if (sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM) 640 pool = optee_config_dyn_shm(); 641 642 /* 643 * If dynamic shared memory is not available or failed - try static one 644 */ 645 if (IS_ERR(pool) && (sec_caps & OPTEE_SMC_SEC_CAP_HAVE_RESERVED_SHM)) 646 pool = optee_config_shm_memremap(invoke_fn, &memremaped_shm); 647 648 if (IS_ERR(pool)) 649 return PTR_ERR(pool); 650 651 optee = kzalloc(sizeof(*optee), GFP_KERNEL); 652 if (!optee) { 653 rc = -ENOMEM; 654 goto err; 655 } 656 657 optee->invoke_fn = invoke_fn; 658 optee->sec_caps = sec_caps; 659 660 teedev = tee_device_alloc(&optee_desc, NULL, pool, optee); 661 if (IS_ERR(teedev)) { 662 rc = PTR_ERR(teedev); 663 goto err; 664 } 665 optee->teedev = teedev; 666 667 teedev = tee_device_alloc(&optee_supp_desc, NULL, pool, optee); 668 if (IS_ERR(teedev)) { 669 rc = PTR_ERR(teedev); 670 goto err; 671 } 672 optee->supp_teedev = teedev; 673 674 rc = tee_device_register(optee->teedev); 675 if (rc) 676 goto err; 677 678 rc = tee_device_register(optee->supp_teedev); 679 if (rc) 680 goto err; 681 682 mutex_init(&optee->call_queue.mutex); 683 INIT_LIST_HEAD(&optee->call_queue.waiters); 684 optee_wait_queue_init(&optee->wait_queue); 685 optee_supp_init(&optee->supp); 686 optee->memremaped_shm = memremaped_shm; 687 optee->pool = pool; 688 689 optee_enable_shm_cache(optee); 690 691 if (optee->sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM) 692 pr_info("dynamic shared memory is enabled\n"); 693 694 platform_set_drvdata(pdev, optee); 695 696 rc = optee_enumerate_devices(PTA_CMD_GET_DEVICES); 697 if (rc) { 698 optee_remove(pdev); 699 return rc; 700 } 701 702 pr_info("initialized driver\n"); 703 return 0; 704 err: 705 if (optee) { 706 /* 707 * tee_device_unregister() is safe to call even if the 708 * devices hasn't been registered with 709 * tee_device_register() yet. 710 */ 711 tee_device_unregister(optee->supp_teedev); 712 tee_device_unregister(optee->teedev); 713 kfree(optee); 714 } 715 if (pool) 716 tee_shm_pool_free(pool); 717 if (memremaped_shm) 718 memunmap(memremaped_shm); 719 return rc; 720 } 721 722 static const struct of_device_id optee_dt_match[] = { 723 { .compatible = "linaro,optee-tz" }, 724 {}, 725 }; 726 MODULE_DEVICE_TABLE(of, optee_dt_match); 727 728 static struct platform_driver optee_driver = { 729 .probe = optee_probe, 730 .remove = optee_remove, 731 .driver = { 732 .name = "optee", 733 .of_match_table = optee_dt_match, 734 }, 735 }; 736 module_platform_driver(optee_driver); 737 738 MODULE_AUTHOR("Linaro"); 739 MODULE_DESCRIPTION("OP-TEE driver"); 740 MODULE_VERSION("1.0"); 741 MODULE_LICENSE("GPL v2"); 742 MODULE_ALIAS("platform:optee"); 743