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 83 /* Check that the memref is covered by the shm object */ 84 if (p->u.memref.size) { 85 size_t o = p->u.memref.shm_offs + 86 p->u.memref.size - 1; 87 88 rc = tee_shm_get_pa(shm, o, NULL); 89 if (rc) 90 return rc; 91 } 92 break; 93 case OPTEE_MSG_ATTR_TYPE_RMEM_INPUT: 94 case OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT: 95 case OPTEE_MSG_ATTR_TYPE_RMEM_INOUT: 96 p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT + 97 attr - OPTEE_MSG_ATTR_TYPE_RMEM_INPUT; 98 p->u.memref.size = mp->u.rmem.size; 99 shm = (struct tee_shm *)(unsigned long) 100 mp->u.rmem.shm_ref; 101 102 if (!shm) { 103 p->u.memref.shm_offs = 0; 104 p->u.memref.shm = NULL; 105 break; 106 } 107 p->u.memref.shm_offs = mp->u.rmem.offs; 108 p->u.memref.shm = shm; 109 110 break; 111 112 default: 113 return -EINVAL; 114 } 115 } 116 return 0; 117 } 118 119 static int to_msg_param_tmp_mem(struct optee_msg_param *mp, 120 const struct tee_param *p) 121 { 122 int rc; 123 phys_addr_t pa; 124 125 mp->attr = OPTEE_MSG_ATTR_TYPE_TMEM_INPUT + p->attr - 126 TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT; 127 128 mp->u.tmem.shm_ref = (unsigned long)p->u.memref.shm; 129 mp->u.tmem.size = p->u.memref.size; 130 131 if (!p->u.memref.shm) { 132 mp->u.tmem.buf_ptr = 0; 133 return 0; 134 } 135 136 rc = tee_shm_get_pa(p->u.memref.shm, p->u.memref.shm_offs, &pa); 137 if (rc) 138 return rc; 139 140 mp->u.tmem.buf_ptr = pa; 141 mp->attr |= OPTEE_MSG_ATTR_CACHE_PREDEFINED << 142 OPTEE_MSG_ATTR_CACHE_SHIFT; 143 144 return 0; 145 } 146 147 static int to_msg_param_reg_mem(struct optee_msg_param *mp, 148 const struct tee_param *p) 149 { 150 mp->attr = OPTEE_MSG_ATTR_TYPE_RMEM_INPUT + p->attr - 151 TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT; 152 153 mp->u.rmem.shm_ref = (unsigned long)p->u.memref.shm; 154 mp->u.rmem.size = p->u.memref.size; 155 mp->u.rmem.offs = p->u.memref.shm_offs; 156 return 0; 157 } 158 159 /** 160 * optee_to_msg_param() - convert from struct tee_params to OPTEE_MSG parameters 161 * @msg_params: OPTEE_MSG parameters 162 * @num_params: number of elements in the parameter arrays 163 * @params: subsystem itnernal parameter representation 164 * Returns 0 on success or <0 on failure 165 */ 166 int optee_to_msg_param(struct optee_msg_param *msg_params, size_t num_params, 167 const struct tee_param *params) 168 { 169 int rc; 170 size_t n; 171 172 for (n = 0; n < num_params; n++) { 173 const struct tee_param *p = params + n; 174 struct optee_msg_param *mp = msg_params + n; 175 176 switch (p->attr) { 177 case TEE_IOCTL_PARAM_ATTR_TYPE_NONE: 178 mp->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE; 179 memset(&mp->u, 0, sizeof(mp->u)); 180 break; 181 case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT: 182 case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT: 183 case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT: 184 mp->attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT + p->attr - 185 TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT; 186 mp->u.value.a = p->u.value.a; 187 mp->u.value.b = p->u.value.b; 188 mp->u.value.c = p->u.value.c; 189 break; 190 case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT: 191 case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT: 192 case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT: 193 if (tee_shm_is_registered(p->u.memref.shm)) 194 rc = to_msg_param_reg_mem(mp, p); 195 else 196 rc = to_msg_param_tmp_mem(mp, p); 197 if (rc) 198 return rc; 199 break; 200 default: 201 return -EINVAL; 202 } 203 } 204 return 0; 205 } 206 207 static void optee_get_version(struct tee_device *teedev, 208 struct tee_ioctl_version_data *vers) 209 { 210 struct tee_ioctl_version_data v = { 211 .impl_id = TEE_IMPL_ID_OPTEE, 212 .impl_caps = TEE_OPTEE_CAP_TZ, 213 .gen_caps = TEE_GEN_CAP_GP, 214 }; 215 struct optee *optee = tee_get_drvdata(teedev); 216 217 if (optee->sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM) 218 v.gen_caps |= TEE_GEN_CAP_REG_MEM; 219 *vers = v; 220 } 221 222 static void optee_bus_scan(struct work_struct *work) 223 { 224 WARN_ON(optee_enumerate_devices(PTA_CMD_GET_DEVICES_SUPP)); 225 } 226 227 static int optee_open(struct tee_context *ctx) 228 { 229 struct optee_context_data *ctxdata; 230 struct tee_device *teedev = ctx->teedev; 231 struct optee *optee = tee_get_drvdata(teedev); 232 233 ctxdata = kzalloc(sizeof(*ctxdata), GFP_KERNEL); 234 if (!ctxdata) 235 return -ENOMEM; 236 237 if (teedev == optee->supp_teedev) { 238 bool busy = true; 239 240 mutex_lock(&optee->supp.mutex); 241 if (!optee->supp.ctx) { 242 busy = false; 243 optee->supp.ctx = ctx; 244 } 245 mutex_unlock(&optee->supp.mutex); 246 if (busy) { 247 kfree(ctxdata); 248 return -EBUSY; 249 } 250 251 if (!optee->scan_bus_done) { 252 INIT_WORK(&optee->scan_bus_work, optee_bus_scan); 253 optee->scan_bus_wq = create_workqueue("optee_bus_scan"); 254 if (!optee->scan_bus_wq) { 255 kfree(ctxdata); 256 return -ECHILD; 257 } 258 queue_work(optee->scan_bus_wq, &optee->scan_bus_work); 259 optee->scan_bus_done = true; 260 } 261 } 262 mutex_init(&ctxdata->mutex); 263 INIT_LIST_HEAD(&ctxdata->sess_list); 264 265 ctx->data = ctxdata; 266 return 0; 267 } 268 269 static void optee_release(struct tee_context *ctx) 270 { 271 struct optee_context_data *ctxdata = ctx->data; 272 struct tee_device *teedev = ctx->teedev; 273 struct optee *optee = tee_get_drvdata(teedev); 274 struct tee_shm *shm; 275 struct optee_msg_arg *arg = NULL; 276 phys_addr_t parg; 277 struct optee_session *sess; 278 struct optee_session *sess_tmp; 279 280 if (!ctxdata) 281 return; 282 283 shm = tee_shm_alloc(ctx, sizeof(struct optee_msg_arg), TEE_SHM_MAPPED); 284 if (!IS_ERR(shm)) { 285 arg = tee_shm_get_va(shm, 0); 286 /* 287 * If va2pa fails for some reason, we can't call into 288 * secure world, only free the memory. Secure OS will leak 289 * sessions and finally refuse more sessions, but we will 290 * at least let normal world reclaim its memory. 291 */ 292 if (!IS_ERR(arg)) 293 if (tee_shm_va2pa(shm, arg, &parg)) 294 arg = NULL; /* prevent usage of parg below */ 295 } 296 297 list_for_each_entry_safe(sess, sess_tmp, &ctxdata->sess_list, 298 list_node) { 299 list_del(&sess->list_node); 300 if (!IS_ERR_OR_NULL(arg)) { 301 memset(arg, 0, sizeof(*arg)); 302 arg->cmd = OPTEE_MSG_CMD_CLOSE_SESSION; 303 arg->session = sess->session_id; 304 optee_do_call_with_arg(ctx, parg); 305 } 306 kfree(sess); 307 } 308 kfree(ctxdata); 309 310 if (!IS_ERR(shm)) 311 tee_shm_free(shm); 312 313 ctx->data = NULL; 314 315 if (teedev == optee->supp_teedev) { 316 if (optee->scan_bus_wq) { 317 destroy_workqueue(optee->scan_bus_wq); 318 optee->scan_bus_wq = NULL; 319 } 320 optee_supp_release(&optee->supp); 321 } 322 } 323 324 static const struct tee_driver_ops optee_ops = { 325 .get_version = optee_get_version, 326 .open = optee_open, 327 .release = optee_release, 328 .open_session = optee_open_session, 329 .close_session = optee_close_session, 330 .invoke_func = optee_invoke_func, 331 .cancel_req = optee_cancel_req, 332 .shm_register = optee_shm_register, 333 .shm_unregister = optee_shm_unregister, 334 }; 335 336 static const struct tee_desc optee_desc = { 337 .name = DRIVER_NAME "-clnt", 338 .ops = &optee_ops, 339 .owner = THIS_MODULE, 340 }; 341 342 static const struct tee_driver_ops optee_supp_ops = { 343 .get_version = optee_get_version, 344 .open = optee_open, 345 .release = optee_release, 346 .supp_recv = optee_supp_recv, 347 .supp_send = optee_supp_send, 348 .shm_register = optee_shm_register_supp, 349 .shm_unregister = optee_shm_unregister_supp, 350 }; 351 352 static const struct tee_desc optee_supp_desc = { 353 .name = DRIVER_NAME "-supp", 354 .ops = &optee_supp_ops, 355 .owner = THIS_MODULE, 356 .flags = TEE_DESC_PRIVILEGED, 357 }; 358 359 static bool optee_msg_api_uid_is_optee_api(optee_invoke_fn *invoke_fn) 360 { 361 struct arm_smccc_res res; 362 363 invoke_fn(OPTEE_SMC_CALLS_UID, 0, 0, 0, 0, 0, 0, 0, &res); 364 365 if (res.a0 == OPTEE_MSG_UID_0 && res.a1 == OPTEE_MSG_UID_1 && 366 res.a2 == OPTEE_MSG_UID_2 && res.a3 == OPTEE_MSG_UID_3) 367 return true; 368 return false; 369 } 370 371 static void optee_msg_get_os_revision(optee_invoke_fn *invoke_fn) 372 { 373 union { 374 struct arm_smccc_res smccc; 375 struct optee_smc_call_get_os_revision_result result; 376 } res = { 377 .result = { 378 .build_id = 0 379 } 380 }; 381 382 invoke_fn(OPTEE_SMC_CALL_GET_OS_REVISION, 0, 0, 0, 0, 0, 0, 0, 383 &res.smccc); 384 385 if (res.result.build_id) 386 pr_info("revision %lu.%lu (%08lx)", res.result.major, 387 res.result.minor, res.result.build_id); 388 else 389 pr_info("revision %lu.%lu", res.result.major, res.result.minor); 390 } 391 392 static bool optee_msg_api_revision_is_compatible(optee_invoke_fn *invoke_fn) 393 { 394 union { 395 struct arm_smccc_res smccc; 396 struct optee_smc_calls_revision_result result; 397 } res; 398 399 invoke_fn(OPTEE_SMC_CALLS_REVISION, 0, 0, 0, 0, 0, 0, 0, &res.smccc); 400 401 if (res.result.major == OPTEE_MSG_REVISION_MAJOR && 402 (int)res.result.minor >= OPTEE_MSG_REVISION_MINOR) 403 return true; 404 return false; 405 } 406 407 static bool optee_msg_exchange_capabilities(optee_invoke_fn *invoke_fn, 408 u32 *sec_caps) 409 { 410 union { 411 struct arm_smccc_res smccc; 412 struct optee_smc_exchange_capabilities_result result; 413 } res; 414 u32 a1 = 0; 415 416 /* 417 * TODO This isn't enough to tell if it's UP system (from kernel 418 * point of view) or not, is_smp() returns the the information 419 * needed, but can't be called directly from here. 420 */ 421 if (!IS_ENABLED(CONFIG_SMP) || nr_cpu_ids == 1) 422 a1 |= OPTEE_SMC_NSEC_CAP_UNIPROCESSOR; 423 424 invoke_fn(OPTEE_SMC_EXCHANGE_CAPABILITIES, a1, 0, 0, 0, 0, 0, 0, 425 &res.smccc); 426 427 if (res.result.status != OPTEE_SMC_RETURN_OK) 428 return false; 429 430 *sec_caps = res.result.capabilities; 431 return true; 432 } 433 434 static struct tee_shm_pool *optee_config_dyn_shm(void) 435 { 436 struct tee_shm_pool_mgr *priv_mgr; 437 struct tee_shm_pool_mgr *dmabuf_mgr; 438 void *rc; 439 440 rc = optee_shm_pool_alloc_pages(); 441 if (IS_ERR(rc)) 442 return rc; 443 priv_mgr = rc; 444 445 rc = optee_shm_pool_alloc_pages(); 446 if (IS_ERR(rc)) { 447 tee_shm_pool_mgr_destroy(priv_mgr); 448 return rc; 449 } 450 dmabuf_mgr = rc; 451 452 rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr); 453 if (IS_ERR(rc)) { 454 tee_shm_pool_mgr_destroy(priv_mgr); 455 tee_shm_pool_mgr_destroy(dmabuf_mgr); 456 } 457 458 return rc; 459 } 460 461 static struct tee_shm_pool * 462 optee_config_shm_memremap(optee_invoke_fn *invoke_fn, void **memremaped_shm) 463 { 464 union { 465 struct arm_smccc_res smccc; 466 struct optee_smc_get_shm_config_result result; 467 } res; 468 unsigned long vaddr; 469 phys_addr_t paddr; 470 size_t size; 471 phys_addr_t begin; 472 phys_addr_t end; 473 void *va; 474 struct tee_shm_pool_mgr *priv_mgr; 475 struct tee_shm_pool_mgr *dmabuf_mgr; 476 void *rc; 477 const int sz = OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE; 478 479 invoke_fn(OPTEE_SMC_GET_SHM_CONFIG, 0, 0, 0, 0, 0, 0, 0, &res.smccc); 480 if (res.result.status != OPTEE_SMC_RETURN_OK) { 481 pr_err("static shm service not available\n"); 482 return ERR_PTR(-ENOENT); 483 } 484 485 if (res.result.settings != OPTEE_SMC_SHM_CACHED) { 486 pr_err("only normal cached shared memory supported\n"); 487 return ERR_PTR(-EINVAL); 488 } 489 490 begin = roundup(res.result.start, PAGE_SIZE); 491 end = rounddown(res.result.start + res.result.size, PAGE_SIZE); 492 paddr = begin; 493 size = end - begin; 494 495 if (size < 2 * OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE) { 496 pr_err("too small shared memory area\n"); 497 return ERR_PTR(-EINVAL); 498 } 499 500 va = memremap(paddr, size, MEMREMAP_WB); 501 if (!va) { 502 pr_err("shared memory ioremap failed\n"); 503 return ERR_PTR(-EINVAL); 504 } 505 vaddr = (unsigned long)va; 506 507 rc = tee_shm_pool_mgr_alloc_res_mem(vaddr, paddr, sz, 508 3 /* 8 bytes aligned */); 509 if (IS_ERR(rc)) 510 goto err_memunmap; 511 priv_mgr = rc; 512 513 vaddr += sz; 514 paddr += sz; 515 size -= sz; 516 517 rc = tee_shm_pool_mgr_alloc_res_mem(vaddr, paddr, size, PAGE_SHIFT); 518 if (IS_ERR(rc)) 519 goto err_free_priv_mgr; 520 dmabuf_mgr = rc; 521 522 rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr); 523 if (IS_ERR(rc)) 524 goto err_free_dmabuf_mgr; 525 526 *memremaped_shm = va; 527 528 return rc; 529 530 err_free_dmabuf_mgr: 531 tee_shm_pool_mgr_destroy(dmabuf_mgr); 532 err_free_priv_mgr: 533 tee_shm_pool_mgr_destroy(priv_mgr); 534 err_memunmap: 535 memunmap(va); 536 return rc; 537 } 538 539 /* Simple wrapper functions to be able to use a function pointer */ 540 static void optee_smccc_smc(unsigned long a0, unsigned long a1, 541 unsigned long a2, unsigned long a3, 542 unsigned long a4, unsigned long a5, 543 unsigned long a6, unsigned long a7, 544 struct arm_smccc_res *res) 545 { 546 arm_smccc_smc(a0, a1, a2, a3, a4, a5, a6, a7, res); 547 } 548 549 static void optee_smccc_hvc(unsigned long a0, unsigned long a1, 550 unsigned long a2, unsigned long a3, 551 unsigned long a4, unsigned long a5, 552 unsigned long a6, unsigned long a7, 553 struct arm_smccc_res *res) 554 { 555 arm_smccc_hvc(a0, a1, a2, a3, a4, a5, a6, a7, res); 556 } 557 558 static optee_invoke_fn *get_invoke_func(struct device *dev) 559 { 560 const char *method; 561 562 pr_info("probing for conduit method.\n"); 563 564 if (device_property_read_string(dev, "method", &method)) { 565 pr_warn("missing \"method\" property\n"); 566 return ERR_PTR(-ENXIO); 567 } 568 569 if (!strcmp("hvc", method)) 570 return optee_smccc_hvc; 571 else if (!strcmp("smc", method)) 572 return optee_smccc_smc; 573 574 pr_warn("invalid \"method\" property: %s\n", method); 575 return ERR_PTR(-EINVAL); 576 } 577 578 static int optee_remove(struct platform_device *pdev) 579 { 580 struct optee *optee = platform_get_drvdata(pdev); 581 582 /* 583 * Ask OP-TEE to free all cached shared memory objects to decrease 584 * reference counters and also avoid wild pointers in secure world 585 * into the old shared memory range. 586 */ 587 optee_disable_shm_cache(optee); 588 589 /* 590 * The two devices have to be unregistered before we can free the 591 * other resources. 592 */ 593 tee_device_unregister(optee->supp_teedev); 594 tee_device_unregister(optee->teedev); 595 596 tee_shm_pool_free(optee->pool); 597 if (optee->memremaped_shm) 598 memunmap(optee->memremaped_shm); 599 optee_wait_queue_exit(&optee->wait_queue); 600 optee_supp_uninit(&optee->supp); 601 mutex_destroy(&optee->call_queue.mutex); 602 603 kfree(optee); 604 605 return 0; 606 } 607 608 static int optee_probe(struct platform_device *pdev) 609 { 610 optee_invoke_fn *invoke_fn; 611 struct tee_shm_pool *pool = ERR_PTR(-EINVAL); 612 struct optee *optee = NULL; 613 void *memremaped_shm = NULL; 614 struct tee_device *teedev; 615 u32 sec_caps; 616 int rc; 617 618 invoke_fn = get_invoke_func(&pdev->dev); 619 if (IS_ERR(invoke_fn)) 620 return PTR_ERR(invoke_fn); 621 622 if (!optee_msg_api_uid_is_optee_api(invoke_fn)) { 623 pr_warn("api uid mismatch\n"); 624 return -EINVAL; 625 } 626 627 optee_msg_get_os_revision(invoke_fn); 628 629 if (!optee_msg_api_revision_is_compatible(invoke_fn)) { 630 pr_warn("api revision mismatch\n"); 631 return -EINVAL; 632 } 633 634 if (!optee_msg_exchange_capabilities(invoke_fn, &sec_caps)) { 635 pr_warn("capabilities mismatch\n"); 636 return -EINVAL; 637 } 638 639 /* 640 * Try to use dynamic shared memory if possible 641 */ 642 if (sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM) 643 pool = optee_config_dyn_shm(); 644 645 /* 646 * If dynamic shared memory is not available or failed - try static one 647 */ 648 if (IS_ERR(pool) && (sec_caps & OPTEE_SMC_SEC_CAP_HAVE_RESERVED_SHM)) 649 pool = optee_config_shm_memremap(invoke_fn, &memremaped_shm); 650 651 if (IS_ERR(pool)) 652 return PTR_ERR(pool); 653 654 optee = kzalloc(sizeof(*optee), GFP_KERNEL); 655 if (!optee) { 656 rc = -ENOMEM; 657 goto err; 658 } 659 660 optee->invoke_fn = invoke_fn; 661 optee->sec_caps = sec_caps; 662 663 teedev = tee_device_alloc(&optee_desc, NULL, pool, optee); 664 if (IS_ERR(teedev)) { 665 rc = PTR_ERR(teedev); 666 goto err; 667 } 668 optee->teedev = teedev; 669 670 teedev = tee_device_alloc(&optee_supp_desc, NULL, pool, optee); 671 if (IS_ERR(teedev)) { 672 rc = PTR_ERR(teedev); 673 goto err; 674 } 675 optee->supp_teedev = teedev; 676 677 rc = tee_device_register(optee->teedev); 678 if (rc) 679 goto err; 680 681 rc = tee_device_register(optee->supp_teedev); 682 if (rc) 683 goto err; 684 685 mutex_init(&optee->call_queue.mutex); 686 INIT_LIST_HEAD(&optee->call_queue.waiters); 687 optee_wait_queue_init(&optee->wait_queue); 688 optee_supp_init(&optee->supp); 689 optee->memremaped_shm = memremaped_shm; 690 optee->pool = pool; 691 692 optee_enable_shm_cache(optee); 693 694 if (optee->sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM) 695 pr_info("dynamic shared memory is enabled\n"); 696 697 platform_set_drvdata(pdev, optee); 698 699 rc = optee_enumerate_devices(PTA_CMD_GET_DEVICES); 700 if (rc) { 701 optee_remove(pdev); 702 return rc; 703 } 704 705 pr_info("initialized driver\n"); 706 return 0; 707 err: 708 if (optee) { 709 /* 710 * tee_device_unregister() is safe to call even if the 711 * devices hasn't been registered with 712 * tee_device_register() yet. 713 */ 714 tee_device_unregister(optee->supp_teedev); 715 tee_device_unregister(optee->teedev); 716 kfree(optee); 717 } 718 if (pool) 719 tee_shm_pool_free(pool); 720 if (memremaped_shm) 721 memunmap(memremaped_shm); 722 return rc; 723 } 724 725 static const struct of_device_id optee_dt_match[] = { 726 { .compatible = "linaro,optee-tz" }, 727 {}, 728 }; 729 MODULE_DEVICE_TABLE(of, optee_dt_match); 730 731 static struct platform_driver optee_driver = { 732 .probe = optee_probe, 733 .remove = optee_remove, 734 .driver = { 735 .name = "optee", 736 .of_match_table = optee_dt_match, 737 }, 738 }; 739 module_platform_driver(optee_driver); 740 741 MODULE_AUTHOR("Linaro"); 742 MODULE_DESCRIPTION("OP-TEE driver"); 743 MODULE_SUPPORTED_DEVICE(""); 744 MODULE_VERSION("1.0"); 745 MODULE_LICENSE("GPL v2"); 746 MODULE_ALIAS("platform:optee"); 747