1 // SPDX-License-Identifier: BSD-2-Clause 2 /* 3 * Copyright (c) 2020-2021, Linaro Limited. 4 * Copyright (c) 2019-2021, Arm Limited. All rights reserved. 5 */ 6 7 #include <assert.h> 8 #include <ffa.h> 9 #include <initcall.h> 10 #include <io.h> 11 #include <kernel/interrupt.h> 12 #include <kernel/panic.h> 13 #include <kernel/secure_partition.h> 14 #include <kernel/spinlock.h> 15 #include <kernel/spmc_sp_handler.h> 16 #include <kernel/tee_misc.h> 17 #include <kernel/thread.h> 18 #include <kernel/thread_private.h> 19 #include <kernel/thread_spmc.h> 20 #include <mm/core_mmu.h> 21 #include <mm/mobj.h> 22 #include <optee_ffa.h> 23 #include <optee_msg.h> 24 #include <optee_rpc_cmd.h> 25 #include <string.h> 26 #include <sys/queue.h> 27 #include <tee/entry_std.h> 28 #include <tee/uuid.h> 29 #include <util.h> 30 31 #if defined(CFG_CORE_SEL1_SPMC) 32 struct mem_share_state { 33 struct mobj_ffa *mf; 34 unsigned int page_count; 35 unsigned int region_count; 36 unsigned int current_page_idx; 37 }; 38 39 struct mem_frag_state { 40 struct mem_share_state share; 41 tee_mm_entry_t *mm; 42 unsigned int frag_offset; 43 SLIST_ENTRY(mem_frag_state) link; 44 }; 45 #endif 46 47 /* Initialized in spmc_init() below */ 48 static uint16_t my_endpoint_id; 49 50 /* 51 * If struct ffa_rxtx::size is 0 RX/TX buffers are not mapped or initialized. 52 * 53 * struct ffa_rxtx::spin_lock protects the variables below from concurrent 54 * access this includes the use of content of struct ffa_rxtx::rx and 55 * @frag_state_head. 56 * 57 * struct ffa_rxtx::tx_buf_is_mine is true when we may write to struct 58 * ffa_rxtx::tx and false when it is owned by normal world. 59 * 60 * Note that we can't prevent normal world from updating the content of 61 * these buffers so we must always be careful when reading. while we hold 62 * the lock. 63 */ 64 65 #ifdef CFG_CORE_SEL1_SPMC 66 static struct ffa_rxtx nw_rxtx; 67 68 static bool is_nw_buf(struct ffa_rxtx *rxtx) 69 { 70 return rxtx == &nw_rxtx; 71 } 72 73 static SLIST_HEAD(mem_frag_state_head, mem_frag_state) frag_state_head = 74 SLIST_HEAD_INITIALIZER(&frag_state_head); 75 #else 76 static uint8_t __rx_buf[SMALL_PAGE_SIZE] __aligned(SMALL_PAGE_SIZE); 77 static uint8_t __tx_buf[SMALL_PAGE_SIZE] __aligned(SMALL_PAGE_SIZE); 78 static struct ffa_rxtx nw_rxtx = { .rx = __rx_buf, .tx = __tx_buf }; 79 #endif 80 81 static uint32_t swap_src_dst(uint32_t src_dst) 82 { 83 return (src_dst >> 16) | (src_dst << 16); 84 } 85 86 void spmc_set_args(struct thread_smc_args *args, uint32_t fid, uint32_t src_dst, 87 uint32_t w2, uint32_t w3, uint32_t w4, uint32_t w5) 88 { 89 *args = (struct thread_smc_args){ .a0 = fid, 90 .a1 = src_dst, 91 .a2 = w2, 92 .a3 = w3, 93 .a4 = w4, 94 .a5 = w5, }; 95 } 96 97 #if defined(CFG_CORE_SEL1_SPMC) 98 void spmc_handle_version(struct thread_smc_args *args) 99 { 100 /* 101 * We currently only support one version, 1.0 so let's keep it 102 * simple. 103 */ 104 spmc_set_args(args, 105 MAKE_FFA_VERSION(FFA_VERSION_MAJOR, FFA_VERSION_MINOR), 106 FFA_PARAM_MBZ, FFA_PARAM_MBZ, FFA_PARAM_MBZ, 107 FFA_PARAM_MBZ, FFA_PARAM_MBZ); 108 } 109 110 static void handle_features(struct thread_smc_args *args) 111 { 112 uint32_t ret_fid = 0; 113 uint32_t ret_w2 = FFA_PARAM_MBZ; 114 115 switch (args->a1) { 116 #ifdef ARM64 117 case FFA_RXTX_MAP_64: 118 #endif 119 case FFA_RXTX_MAP_32: 120 ret_fid = FFA_SUCCESS_32; 121 ret_w2 = 0; /* 4kB Minimum buffer size and alignment boundary */ 122 break; 123 #ifdef ARM64 124 case FFA_MEM_SHARE_64: 125 #endif 126 case FFA_MEM_SHARE_32: 127 ret_fid = FFA_SUCCESS_32; 128 /* 129 * Partition manager supports transmission of a memory 130 * transaction descriptor in a buffer dynamically allocated 131 * by the endpoint. 132 */ 133 ret_w2 = BIT(0); 134 break; 135 136 case FFA_ERROR: 137 case FFA_VERSION: 138 case FFA_SUCCESS_32: 139 #ifdef ARM64 140 case FFA_SUCCESS_64: 141 #endif 142 case FFA_MEM_FRAG_TX: 143 case FFA_MEM_RECLAIM: 144 case FFA_MSG_SEND_DIRECT_REQ_32: 145 case FFA_INTERRUPT: 146 case FFA_PARTITION_INFO_GET: 147 case FFA_RX_RELEASE: 148 ret_fid = FFA_SUCCESS_32; 149 break; 150 default: 151 ret_fid = FFA_ERROR; 152 ret_w2 = FFA_NOT_SUPPORTED; 153 break; 154 } 155 156 spmc_set_args(args, ret_fid, FFA_PARAM_MBZ, ret_w2, FFA_PARAM_MBZ, 157 FFA_PARAM_MBZ, FFA_PARAM_MBZ); 158 } 159 160 static int map_buf(paddr_t pa, unsigned int sz, void **va_ret) 161 { 162 tee_mm_entry_t *mm = NULL; 163 164 if (!core_pbuf_is(CORE_MEM_NON_SEC, pa, sz)) 165 return FFA_INVALID_PARAMETERS; 166 167 mm = tee_mm_alloc(&tee_mm_shm, sz); 168 if (!mm) 169 return FFA_NO_MEMORY; 170 171 if (core_mmu_map_contiguous_pages(tee_mm_get_smem(mm), pa, 172 sz / SMALL_PAGE_SIZE, 173 MEM_AREA_NSEC_SHM)) { 174 tee_mm_free(mm); 175 return FFA_INVALID_PARAMETERS; 176 } 177 178 *va_ret = (void *)tee_mm_get_smem(mm); 179 return 0; 180 } 181 182 static void unmap_buf(void *va, size_t sz) 183 { 184 tee_mm_entry_t *mm = tee_mm_find(&tee_mm_shm, (vaddr_t)va); 185 186 assert(mm); 187 core_mmu_unmap_pages(tee_mm_get_smem(mm), sz / SMALL_PAGE_SIZE); 188 tee_mm_free(mm); 189 } 190 191 void spmc_handle_rxtx_map(struct thread_smc_args *args, struct ffa_rxtx *rxtx) 192 { 193 int rc = 0; 194 uint32_t ret_fid = FFA_ERROR; 195 unsigned int sz = 0; 196 paddr_t rx_pa = 0; 197 paddr_t tx_pa = 0; 198 void *rx = NULL; 199 void *tx = NULL; 200 201 cpu_spin_lock(&rxtx->spinlock); 202 203 if (args->a3 & GENMASK_64(63, 6)) { 204 rc = FFA_INVALID_PARAMETERS; 205 goto out; 206 } 207 208 sz = args->a3 * SMALL_PAGE_SIZE; 209 if (!sz) { 210 rc = FFA_INVALID_PARAMETERS; 211 goto out; 212 } 213 /* TX/RX are swapped compared to the caller */ 214 tx_pa = args->a2; 215 rx_pa = args->a1; 216 217 if (rxtx->size) { 218 rc = FFA_DENIED; 219 goto out; 220 } 221 222 /* 223 * If the buffer comes from a SP the address is virtual and already 224 * mapped. 225 */ 226 if (is_nw_buf(rxtx)) { 227 rc = map_buf(tx_pa, sz, &tx); 228 if (rc) 229 goto out; 230 rc = map_buf(rx_pa, sz, &rx); 231 if (rc) { 232 unmap_buf(tx, sz); 233 goto out; 234 } 235 rxtx->tx = tx; 236 rxtx->rx = rx; 237 } else { 238 if ((tx_pa & SMALL_PAGE_MASK) || (rx_pa & SMALL_PAGE_MASK)) { 239 rc = FFA_INVALID_PARAMETERS; 240 goto out; 241 } 242 243 if (!virt_to_phys((void *)tx_pa) || 244 !virt_to_phys((void *)rx_pa)) { 245 rc = FFA_INVALID_PARAMETERS; 246 goto out; 247 } 248 249 rxtx->tx = (void *)tx_pa; 250 rxtx->rx = (void *)rx_pa; 251 } 252 253 rxtx->size = sz; 254 rxtx->tx_is_mine = true; 255 ret_fid = FFA_SUCCESS_32; 256 DMSG("Mapped tx %#"PRIxPA" size %#x @ %p", tx_pa, sz, tx); 257 DMSG("Mapped rx %#"PRIxPA" size %#x @ %p", rx_pa, sz, rx); 258 out: 259 cpu_spin_unlock(&rxtx->spinlock); 260 spmc_set_args(args, ret_fid, FFA_PARAM_MBZ, rc, FFA_PARAM_MBZ, 261 FFA_PARAM_MBZ, FFA_PARAM_MBZ); 262 } 263 264 void spmc_handle_rxtx_unmap(struct thread_smc_args *args, struct ffa_rxtx *rxtx) 265 { 266 uint32_t ret_fid = FFA_ERROR; 267 int rc = FFA_INVALID_PARAMETERS; 268 269 cpu_spin_lock(&rxtx->spinlock); 270 271 if (!rxtx->size) 272 goto out; 273 274 /* We don't unmap the SP memory as the SP might still use it */ 275 if (is_nw_buf(rxtx)) { 276 unmap_buf(rxtx->rx, rxtx->size); 277 unmap_buf(rxtx->tx, rxtx->size); 278 } 279 rxtx->size = 0; 280 rxtx->rx = NULL; 281 rxtx->tx = NULL; 282 ret_fid = FFA_SUCCESS_32; 283 rc = 0; 284 out: 285 cpu_spin_unlock(&rxtx->spinlock); 286 spmc_set_args(args, ret_fid, FFA_PARAM_MBZ, rc, FFA_PARAM_MBZ, 287 FFA_PARAM_MBZ, FFA_PARAM_MBZ); 288 } 289 290 void spmc_handle_rx_release(struct thread_smc_args *args, struct ffa_rxtx *rxtx) 291 { 292 uint32_t ret_fid = 0; 293 int rc = 0; 294 295 cpu_spin_lock(&rxtx->spinlock); 296 /* The senders RX is our TX */ 297 if (!rxtx->size || rxtx->tx_is_mine) { 298 ret_fid = FFA_ERROR; 299 rc = FFA_DENIED; 300 } else { 301 ret_fid = FFA_SUCCESS_32; 302 rc = 0; 303 rxtx->tx_is_mine = true; 304 } 305 cpu_spin_unlock(&rxtx->spinlock); 306 307 spmc_set_args(args, ret_fid, FFA_PARAM_MBZ, rc, FFA_PARAM_MBZ, 308 FFA_PARAM_MBZ, FFA_PARAM_MBZ); 309 } 310 311 static bool is_nil_uuid(uint32_t w0, uint32_t w1, uint32_t w2, uint32_t w3) 312 { 313 return !w0 && !w1 && !w2 && !w3; 314 } 315 316 static bool is_my_uuid(uint32_t w0, uint32_t w1, uint32_t w2, uint32_t w3) 317 { 318 /* 319 * This depends on which UUID we have been assigned. 320 * TODO add a generic mechanism to obtain our UUID. 321 * 322 * The test below is for the hard coded UUID 323 * 486178e0-e7f8-11e3-bc5e-0002a5d5c51b 324 */ 325 return w0 == 0xe0786148 && w1 == 0xe311f8e7 && 326 w2 == 0x02005ebc && w3 == 0x1bc5d5a5; 327 } 328 329 void spmc_fill_partition_entry(struct ffa_partition_info *fpi, 330 uint16_t endpoint_id, uint16_t execution_context) 331 { 332 fpi->id = endpoint_id; 333 /* Number of execution contexts implemented by this partition */ 334 fpi->execution_context = execution_context; 335 336 fpi->partition_properties = FFA_PARTITION_DIRECT_REQ_RECV_SUPPORT | 337 FFA_PARTITION_DIRECT_REQ_SEND_SUPPORT; 338 } 339 340 static uint32_t handle_partition_info_get_all(size_t *elem_count, 341 struct ffa_rxtx *rxtx) 342 { 343 struct ffa_partition_info *fpi = rxtx->tx; 344 345 /* Add OP-TEE SP */ 346 spmc_fill_partition_entry(fpi, my_endpoint_id, CFG_TEE_CORE_NB_CORE); 347 rxtx->tx_is_mine = false; 348 *elem_count = 1; 349 fpi++; 350 351 if (IS_ENABLED(CFG_SECURE_PARTITION)) { 352 size_t count = (rxtx->size / sizeof(*fpi)) - 1; 353 354 if (sp_partition_info_get_all(fpi, &count)) 355 return FFA_NO_MEMORY; 356 *elem_count += count; 357 } 358 359 return FFA_OK; 360 } 361 362 void spmc_handle_partition_info_get(struct thread_smc_args *args, 363 struct ffa_rxtx *rxtx) 364 { 365 uint32_t ret_fid = FFA_ERROR; 366 uint32_t rc = 0; 367 uint32_t endpoint_id = my_endpoint_id; 368 struct ffa_partition_info *fpi = NULL; 369 370 cpu_spin_lock(&rxtx->spinlock); 371 372 if (!rxtx->size || !rxtx->tx_is_mine) { 373 if (rxtx->size) 374 rc = FFA_BUSY; 375 else 376 rc = FFA_DENIED; /* TX buffer not setup yet */ 377 goto out; 378 } 379 380 fpi = rxtx->tx; 381 382 if (rxtx->size < sizeof(*fpi)) { 383 ret_fid = FFA_ERROR; 384 rc = FFA_NO_MEMORY; 385 goto out; 386 } 387 388 if (is_nil_uuid(args->a1, args->a2, args->a3, args->a4)) { 389 size_t elem_count = 0; 390 391 ret_fid = handle_partition_info_get_all(&elem_count, rxtx); 392 393 if (ret_fid) { 394 rc = ret_fid; 395 ret_fid = FFA_ERROR; 396 } else { 397 ret_fid = FFA_SUCCESS_32; 398 rc = elem_count; 399 } 400 401 goto out; 402 } 403 404 if (is_my_uuid(args->a1, args->a2, args->a3, args->a4)) { 405 spmc_fill_partition_entry(fpi, endpoint_id, 406 CFG_TEE_CORE_NB_CORE); 407 } else if (IS_ENABLED(CFG_SECURE_PARTITION)) { 408 uint32_t uuid_array[4] = { 0 }; 409 TEE_UUID uuid = { }; 410 TEE_Result res = TEE_SUCCESS; 411 412 uuid_array[0] = args->a1; 413 uuid_array[1] = args->a2; 414 uuid_array[2] = args->a3; 415 uuid_array[3] = args->a4; 416 tee_uuid_from_octets(&uuid, (uint8_t *)uuid_array); 417 418 res = sp_find_session_id(&uuid, &endpoint_id); 419 if (res != TEE_SUCCESS) { 420 ret_fid = FFA_ERROR; 421 rc = FFA_INVALID_PARAMETERS; 422 goto out; 423 } 424 spmc_fill_partition_entry(fpi, endpoint_id, 1); 425 } else { 426 ret_fid = FFA_ERROR; 427 rc = FFA_INVALID_PARAMETERS; 428 goto out; 429 } 430 431 ret_fid = FFA_SUCCESS_32; 432 rxtx->tx_is_mine = false; 433 rc = 1; 434 435 out: 436 spmc_set_args(args, ret_fid, FFA_PARAM_MBZ, rc, FFA_PARAM_MBZ, 437 FFA_PARAM_MBZ, FFA_PARAM_MBZ); 438 cpu_spin_unlock(&rxtx->spinlock); 439 } 440 #endif /*CFG_CORE_SEL1_SPMC*/ 441 442 static void handle_yielding_call(struct thread_smc_args *args) 443 { 444 TEE_Result res = 0; 445 446 thread_check_canaries(); 447 448 if (args->a3 == OPTEE_FFA_YIELDING_CALL_RESUME) { 449 /* Note connection to struct thread_rpc_arg::ret */ 450 thread_resume_from_rpc(args->a7, args->a4, args->a5, args->a6, 451 0); 452 res = TEE_ERROR_BAD_PARAMETERS; 453 } else { 454 thread_alloc_and_run(args->a1, args->a3, args->a4, args->a5, 455 args->a6, args->a7); 456 res = TEE_ERROR_BUSY; 457 } 458 spmc_set_args(args, FFA_MSG_SEND_DIRECT_RESP_32, 459 swap_src_dst(args->a1), 0, res, 0, 0); 460 } 461 462 static uint32_t handle_unregister_shm(uint32_t a4, uint32_t a5) 463 { 464 uint64_t cookie = reg_pair_to_64(a5, a4); 465 uint32_t res = 0; 466 467 res = mobj_ffa_unregister_by_cookie(cookie); 468 switch (res) { 469 case TEE_SUCCESS: 470 case TEE_ERROR_ITEM_NOT_FOUND: 471 return 0; 472 case TEE_ERROR_BUSY: 473 EMSG("res %#"PRIx32, res); 474 return FFA_BUSY; 475 default: 476 EMSG("res %#"PRIx32, res); 477 return FFA_INVALID_PARAMETERS; 478 } 479 } 480 481 static void handle_blocking_call(struct thread_smc_args *args) 482 { 483 switch (args->a3) { 484 case OPTEE_FFA_GET_API_VERSION: 485 spmc_set_args(args, FFA_MSG_SEND_DIRECT_RESP_32, 486 swap_src_dst(args->a1), 0, 487 OPTEE_FFA_VERSION_MAJOR, OPTEE_FFA_VERSION_MINOR, 488 0); 489 break; 490 case OPTEE_FFA_GET_OS_VERSION: 491 spmc_set_args(args, FFA_MSG_SEND_DIRECT_RESP_32, 492 swap_src_dst(args->a1), 0, 493 CFG_OPTEE_REVISION_MAJOR, 494 CFG_OPTEE_REVISION_MINOR, TEE_IMPL_GIT_SHA1); 495 break; 496 case OPTEE_FFA_EXCHANGE_CAPABILITIES: 497 spmc_set_args(args, FFA_MSG_SEND_DIRECT_RESP_32, 498 swap_src_dst(args->a1), 0, 0, 499 THREAD_RPC_MAX_NUM_PARAMS, 0); 500 break; 501 case OPTEE_FFA_UNREGISTER_SHM: 502 spmc_set_args(args, FFA_MSG_SEND_DIRECT_RESP_32, 503 swap_src_dst(args->a1), 0, 504 handle_unregister_shm(args->a4, args->a5), 0, 0); 505 break; 506 default: 507 EMSG("Unhandled blocking service ID %#"PRIx32, 508 (uint32_t)args->a3); 509 panic(); 510 } 511 } 512 513 #if defined(CFG_CORE_SEL1_SPMC) 514 static int get_acc_perms(struct ffa_mem_access *mem_acc, 515 unsigned int num_mem_accs, uint8_t *acc_perms, 516 unsigned int *region_offs) 517 { 518 unsigned int n = 0; 519 520 for (n = 0; n < num_mem_accs; n++) { 521 struct ffa_mem_access_perm *descr = &mem_acc[n].access_perm; 522 523 if (READ_ONCE(descr->endpoint_id) == my_endpoint_id) { 524 *acc_perms = READ_ONCE(descr->perm); 525 *region_offs = READ_ONCE(mem_acc[n].region_offs); 526 return 0; 527 } 528 } 529 530 return FFA_INVALID_PARAMETERS; 531 } 532 533 static int mem_share_init(void *buf, size_t blen, unsigned int *page_count, 534 unsigned int *region_count, size_t *addr_range_offs) 535 { 536 const uint8_t exp_mem_reg_attr = FFA_NORMAL_MEM_REG_ATTR; 537 const uint8_t exp_mem_acc_perm = FFA_MEM_ACC_RW; 538 struct ffa_mem_region *region_descr = NULL; 539 struct ffa_mem_transaction *descr = NULL; 540 unsigned int num_mem_accs = 0; 541 uint8_t mem_acc_perm = 0; 542 unsigned int region_descr_offs = 0; 543 size_t n = 0; 544 545 if (!IS_ALIGNED_WITH_TYPE(buf, struct ffa_mem_transaction) || 546 blen < sizeof(struct ffa_mem_transaction)) 547 return FFA_INVALID_PARAMETERS; 548 549 descr = buf; 550 551 /* Check that the endpoint memory access descriptor array fits */ 552 num_mem_accs = READ_ONCE(descr->mem_access_count); 553 if (MUL_OVERFLOW(sizeof(struct ffa_mem_access), num_mem_accs, &n) || 554 ADD_OVERFLOW(sizeof(*descr), n, &n) || n > blen) 555 return FFA_INVALID_PARAMETERS; 556 557 if (READ_ONCE(descr->mem_reg_attr) != exp_mem_reg_attr) 558 return FFA_INVALID_PARAMETERS; 559 560 /* Check that the access permissions matches what's expected */ 561 if (get_acc_perms(descr->mem_access_array, 562 num_mem_accs, &mem_acc_perm, ®ion_descr_offs) || 563 mem_acc_perm != exp_mem_acc_perm) 564 return FFA_INVALID_PARAMETERS; 565 566 /* Check that the Composite memory region descriptor fits */ 567 if (ADD_OVERFLOW(region_descr_offs, sizeof(*region_descr), &n) || 568 n > blen) 569 return FFA_INVALID_PARAMETERS; 570 571 if (!IS_ALIGNED_WITH_TYPE((vaddr_t)descr + region_descr_offs, 572 struct ffa_mem_region)) 573 return FFA_INVALID_PARAMETERS; 574 575 region_descr = (struct ffa_mem_region *)((vaddr_t)descr + 576 region_descr_offs); 577 *page_count = READ_ONCE(region_descr->total_page_count); 578 *region_count = READ_ONCE(region_descr->address_range_count); 579 *addr_range_offs = n; 580 return 0; 581 } 582 583 static int add_mem_share_helper(struct mem_share_state *s, void *buf, 584 size_t flen) 585 { 586 unsigned int region_count = flen / sizeof(struct ffa_address_range); 587 struct ffa_address_range *arange = NULL; 588 unsigned int n = 0; 589 590 if (region_count > s->region_count) 591 region_count = s->region_count; 592 593 if (!IS_ALIGNED_WITH_TYPE(buf, struct ffa_address_range)) 594 return FFA_INVALID_PARAMETERS; 595 arange = buf; 596 597 for (n = 0; n < region_count; n++) { 598 unsigned int page_count = READ_ONCE(arange[n].page_count); 599 uint64_t addr = READ_ONCE(arange[n].address); 600 601 if (mobj_ffa_add_pages_at(s->mf, &s->current_page_idx, 602 addr, page_count)) 603 return FFA_INVALID_PARAMETERS; 604 } 605 606 s->region_count -= region_count; 607 if (s->region_count) 608 return region_count * sizeof(*arange); 609 610 if (s->current_page_idx != s->page_count) 611 return FFA_INVALID_PARAMETERS; 612 613 return 0; 614 } 615 616 static int add_mem_share_frag(struct mem_frag_state *s, void *buf, size_t flen) 617 { 618 int rc = 0; 619 620 rc = add_mem_share_helper(&s->share, buf, flen); 621 if (rc >= 0) { 622 if (!ADD_OVERFLOW(s->frag_offset, rc, &s->frag_offset)) { 623 if (s->share.region_count) 624 return s->frag_offset; 625 /* We're done, return the number of consumed bytes */ 626 rc = s->frag_offset; 627 } else { 628 rc = FFA_INVALID_PARAMETERS; 629 } 630 } 631 632 SLIST_REMOVE(&frag_state_head, s, mem_frag_state, link); 633 if (rc < 0) 634 mobj_ffa_sel1_spmc_delete(s->share.mf); 635 else 636 mobj_ffa_push_to_inactive(s->share.mf); 637 free(s); 638 639 return rc; 640 } 641 642 static bool is_sp_share(void *buf) 643 { 644 struct ffa_mem_transaction *input_descr = NULL; 645 struct ffa_mem_access_perm *perm = NULL; 646 647 if (!IS_ENABLED(CFG_SECURE_PARTITION)) 648 return false; 649 650 input_descr = buf; 651 perm = &input_descr->mem_access_array[0].access_perm; 652 653 /* 654 * perm->endpoint_id is read here only to check if the endpoint is 655 * OP-TEE. We do read it later on again, but there are some additional 656 * checks there to make sure that the data is correct. 657 */ 658 return READ_ONCE(perm->endpoint_id) != my_endpoint_id; 659 } 660 661 static int add_mem_share(tee_mm_entry_t *mm, void *buf, size_t blen, 662 size_t flen, uint64_t *global_handle) 663 { 664 int rc = 0; 665 struct mem_share_state share = { }; 666 size_t addr_range_offs = 0; 667 size_t n = 0; 668 669 if (flen > blen) 670 return FFA_INVALID_PARAMETERS; 671 672 rc = mem_share_init(buf, flen, &share.page_count, &share.region_count, 673 &addr_range_offs); 674 if (rc) 675 return rc; 676 677 if (MUL_OVERFLOW(share.region_count, 678 sizeof(struct ffa_address_range), &n) || 679 ADD_OVERFLOW(n, addr_range_offs, &n) || n > blen) 680 return FFA_INVALID_PARAMETERS; 681 682 share.mf = mobj_ffa_sel1_spmc_new(share.page_count); 683 if (!share.mf) 684 return FFA_NO_MEMORY; 685 686 if (flen != blen) { 687 struct mem_frag_state *s = calloc(sizeof(*s), 1); 688 689 if (!s) { 690 rc = FFA_NO_MEMORY; 691 goto err; 692 } 693 s->share = share; 694 s->mm = mm; 695 s->frag_offset = addr_range_offs; 696 697 SLIST_INSERT_HEAD(&frag_state_head, s, link); 698 rc = add_mem_share_frag(s, (char *)buf + addr_range_offs, 699 flen - addr_range_offs); 700 701 if (rc >= 0) 702 *global_handle = mobj_ffa_get_cookie(share.mf); 703 704 return rc; 705 } 706 707 rc = add_mem_share_helper(&share, (char *)buf + addr_range_offs, 708 flen - addr_range_offs); 709 if (rc) { 710 /* 711 * Number of consumed bytes may be returned instead of 0 for 712 * done. 713 */ 714 rc = FFA_INVALID_PARAMETERS; 715 goto err; 716 } 717 718 *global_handle = mobj_ffa_push_to_inactive(share.mf); 719 720 return 0; 721 err: 722 mobj_ffa_sel1_spmc_delete(share.mf); 723 return rc; 724 } 725 726 static int handle_mem_share_tmem(paddr_t pbuf, size_t blen, size_t flen, 727 unsigned int page_count, 728 uint64_t *global_handle, struct ffa_rxtx *rxtx) 729 { 730 int rc = 0; 731 size_t len = 0; 732 tee_mm_entry_t *mm = NULL; 733 vaddr_t offs = pbuf & SMALL_PAGE_MASK; 734 735 if (MUL_OVERFLOW(page_count, SMALL_PAGE_SIZE, &len)) 736 return FFA_INVALID_PARAMETERS; 737 if (!core_pbuf_is(CORE_MEM_NON_SEC, pbuf, len)) 738 return FFA_INVALID_PARAMETERS; 739 740 /* 741 * Check that the length reported in blen is covered by len even 742 * if the offset is taken into account. 743 */ 744 if (len < blen || len - offs < blen) 745 return FFA_INVALID_PARAMETERS; 746 747 mm = tee_mm_alloc(&tee_mm_shm, len); 748 if (!mm) 749 return FFA_NO_MEMORY; 750 751 if (core_mmu_map_contiguous_pages(tee_mm_get_smem(mm), pbuf, 752 page_count, MEM_AREA_NSEC_SHM)) { 753 rc = FFA_INVALID_PARAMETERS; 754 goto out; 755 } 756 757 cpu_spin_lock(&rxtx->spinlock); 758 rc = add_mem_share(mm, (void *)(tee_mm_get_smem(mm) + offs), blen, flen, 759 global_handle); 760 cpu_spin_unlock(&rxtx->spinlock); 761 if (rc > 0) 762 return rc; 763 764 core_mmu_unmap_pages(tee_mm_get_smem(mm), page_count); 765 out: 766 tee_mm_free(mm); 767 return rc; 768 } 769 770 static int handle_mem_share_rxbuf(size_t blen, size_t flen, 771 uint64_t *global_handle, 772 struct ffa_rxtx *rxtx) 773 { 774 int rc = FFA_DENIED; 775 776 cpu_spin_lock(&rxtx->spinlock); 777 778 if (rxtx->rx && flen <= rxtx->size) { 779 if (is_sp_share(rxtx->rx)) { 780 rc = spmc_sp_add_share(rxtx, blen, 781 global_handle, NULL); 782 } else { 783 rc = add_mem_share(NULL, rxtx->rx, blen, flen, 784 global_handle); 785 } 786 } 787 788 cpu_spin_unlock(&rxtx->spinlock); 789 790 return rc; 791 } 792 793 static void handle_mem_share(struct thread_smc_args *args, 794 struct ffa_rxtx *rxtx) 795 { 796 uint32_t ret_w1 = 0; 797 uint32_t ret_w2 = FFA_INVALID_PARAMETERS; 798 uint32_t ret_w3 = 0; 799 uint32_t ret_fid = FFA_ERROR; 800 uint64_t global_handle = 0; 801 int rc = 0; 802 803 /* Check that the MBZs are indeed 0 */ 804 if (args->a5 || args->a6 || args->a7) 805 goto out; 806 807 if (!args->a3) { 808 /* 809 * The memory transaction descriptor is passed via our rx 810 * buffer. 811 */ 812 if (args->a4) 813 goto out; 814 rc = handle_mem_share_rxbuf(args->a1, args->a2, &global_handle, 815 rxtx); 816 } else { 817 rc = handle_mem_share_tmem(args->a3, args->a1, args->a2, 818 args->a4, &global_handle, rxtx); 819 } 820 if (rc < 0) { 821 ret_w2 = rc; 822 goto out; 823 } 824 if (rc > 0) { 825 ret_fid = FFA_MEM_FRAG_RX; 826 ret_w3 = rc; 827 reg_pair_from_64(global_handle, &ret_w2, &ret_w1); 828 } 829 ret_fid = FFA_SUCCESS_32; 830 reg_pair_from_64(global_handle, &ret_w3, &ret_w2); 831 out: 832 spmc_set_args(args, ret_fid, ret_w1, ret_w2, ret_w3, 0, 0); 833 } 834 835 static struct mem_frag_state *get_frag_state(uint64_t global_handle) 836 { 837 struct mem_frag_state *s = NULL; 838 839 SLIST_FOREACH(s, &frag_state_head, link) 840 if (mobj_ffa_get_cookie(s->share.mf) == global_handle) 841 return s; 842 843 return NULL; 844 } 845 846 static void handle_mem_frag_tx(struct thread_smc_args *args, 847 struct ffa_rxtx *rxtx) 848 { 849 int rc = 0; 850 uint64_t global_handle = reg_pair_to_64(READ_ONCE(args->a2), 851 READ_ONCE(args->a1)); 852 size_t flen = READ_ONCE(args->a3); 853 struct mem_frag_state *s = NULL; 854 tee_mm_entry_t *mm = NULL; 855 unsigned int page_count = 0; 856 void *buf = NULL; 857 uint32_t ret_w1 = 0; 858 uint32_t ret_w2 = 0; 859 uint32_t ret_w3 = 0; 860 uint32_t ret_fid = 0; 861 862 /* 863 * Currently we're only doing this for fragmented FFA_MEM_SHARE_* 864 * requests. 865 */ 866 867 cpu_spin_lock(&rxtx->spinlock); 868 869 s = get_frag_state(global_handle); 870 if (!s) { 871 rc = FFA_INVALID_PARAMETERS; 872 goto out; 873 } 874 875 mm = s->mm; 876 if (mm) { 877 if (flen > tee_mm_get_bytes(mm)) { 878 rc = FFA_INVALID_PARAMETERS; 879 goto out; 880 } 881 page_count = s->share.page_count; 882 buf = (void *)tee_mm_get_smem(mm); 883 } else { 884 if (flen > rxtx->size) { 885 rc = FFA_INVALID_PARAMETERS; 886 goto out; 887 } 888 buf = rxtx->rx; 889 } 890 891 rc = add_mem_share_frag(s, buf, flen); 892 out: 893 cpu_spin_unlock(&rxtx->spinlock); 894 895 if (rc <= 0 && mm) { 896 core_mmu_unmap_pages(tee_mm_get_smem(mm), page_count); 897 tee_mm_free(mm); 898 } 899 900 if (rc < 0) { 901 ret_fid = FFA_ERROR; 902 ret_w2 = rc; 903 } else if (rc > 0) { 904 ret_fid = FFA_MEM_FRAG_RX; 905 ret_w3 = rc; 906 reg_pair_from_64(global_handle, &ret_w2, &ret_w1); 907 } else { 908 ret_fid = FFA_SUCCESS_32; 909 reg_pair_from_64(global_handle, &ret_w3, &ret_w2); 910 } 911 912 spmc_set_args(args, ret_fid, ret_w1, ret_w2, ret_w3, 0, 0); 913 } 914 915 static void handle_mem_reclaim(struct thread_smc_args *args) 916 { 917 uint32_t ret_val = FFA_INVALID_PARAMETERS; 918 uint32_t ret_fid = FFA_ERROR; 919 uint64_t cookie = 0; 920 921 if (args->a3 || args->a4 || args->a5 || args->a6 || args->a7) 922 goto out; 923 924 cookie = reg_pair_to_64(args->a2, args->a1); 925 switch (mobj_ffa_sel1_spmc_reclaim(cookie)) { 926 case TEE_SUCCESS: 927 ret_fid = FFA_SUCCESS_32; 928 ret_val = 0; 929 break; 930 case TEE_ERROR_ITEM_NOT_FOUND: 931 DMSG("cookie %#"PRIx64" not found", cookie); 932 ret_val = FFA_INVALID_PARAMETERS; 933 break; 934 default: 935 DMSG("cookie %#"PRIx64" busy", cookie); 936 ret_val = FFA_DENIED; 937 break; 938 } 939 out: 940 spmc_set_args(args, ret_fid, ret_val, 0, 0, 0, 0); 941 } 942 #endif 943 944 /* Only called from assembly */ 945 void thread_spmc_msg_recv(struct thread_smc_args *args); 946 void thread_spmc_msg_recv(struct thread_smc_args *args) 947 { 948 assert((thread_get_exceptions() & THREAD_EXCP_ALL) == THREAD_EXCP_ALL); 949 switch (args->a0) { 950 #if defined(CFG_CORE_SEL1_SPMC) 951 case FFA_VERSION: 952 spmc_handle_version(args); 953 break; 954 case FFA_FEATURES: 955 handle_features(args); 956 break; 957 #ifdef ARM64 958 case FFA_RXTX_MAP_64: 959 #endif 960 case FFA_RXTX_MAP_32: 961 spmc_handle_rxtx_map(args, &nw_rxtx); 962 break; 963 case FFA_RXTX_UNMAP: 964 spmc_handle_rxtx_unmap(args, &nw_rxtx); 965 break; 966 case FFA_RX_RELEASE: 967 spmc_handle_rx_release(args, &nw_rxtx); 968 break; 969 case FFA_PARTITION_INFO_GET: 970 spmc_handle_partition_info_get(args, &nw_rxtx); 971 break; 972 #endif /*CFG_CORE_SEL1_SPMC*/ 973 case FFA_INTERRUPT: 974 itr_core_handler(); 975 spmc_set_args(args, FFA_MSG_WAIT, 0, 0, 0, 0, 0); 976 break; 977 case FFA_MSG_SEND_DIRECT_REQ_32: 978 if (IS_ENABLED(CFG_SECURE_PARTITION) && 979 FFA_DST(args->a1) != my_endpoint_id) { 980 spmc_sp_start_thread(args); 981 break; 982 } 983 984 if (args->a3 & BIT32(OPTEE_FFA_YIELDING_CALL_BIT)) 985 handle_yielding_call(args); 986 else 987 handle_blocking_call(args); 988 break; 989 #if defined(CFG_CORE_SEL1_SPMC) 990 #ifdef ARM64 991 case FFA_MEM_SHARE_64: 992 #endif 993 case FFA_MEM_SHARE_32: 994 handle_mem_share(args, &nw_rxtx); 995 break; 996 case FFA_MEM_RECLAIM: 997 if (!IS_ENABLED(CFG_SECURE_PARTITION) || 998 !ffa_mem_reclaim(args, NULL)) 999 handle_mem_reclaim(args); 1000 break; 1001 case FFA_MEM_FRAG_TX: 1002 handle_mem_frag_tx(args, &nw_rxtx); 1003 break; 1004 #endif /*CFG_CORE_SEL1_SPMC*/ 1005 default: 1006 EMSG("Unhandled FFA function ID %#"PRIx32, (uint32_t)args->a0); 1007 spmc_set_args(args, FFA_ERROR, FFA_PARAM_MBZ, FFA_NOT_SUPPORTED, 1008 FFA_PARAM_MBZ, FFA_PARAM_MBZ, FFA_PARAM_MBZ); 1009 } 1010 } 1011 1012 static TEE_Result yielding_call_with_arg(uint64_t cookie, uint32_t offset) 1013 { 1014 size_t sz_rpc = OPTEE_MSG_GET_ARG_SIZE(THREAD_RPC_MAX_NUM_PARAMS); 1015 struct thread_ctx *thr = threads + thread_get_id(); 1016 TEE_Result res = TEE_ERROR_BAD_PARAMETERS; 1017 struct optee_msg_arg *arg = NULL; 1018 struct mobj *mobj = NULL; 1019 uint32_t num_params = 0; 1020 size_t sz = 0; 1021 1022 mobj = mobj_ffa_get_by_cookie(cookie, 0); 1023 if (!mobj) { 1024 EMSG("Can't find cookie %#"PRIx64, cookie); 1025 return TEE_ERROR_BAD_PARAMETERS; 1026 } 1027 1028 res = mobj_inc_map(mobj); 1029 if (res) 1030 goto out_put_mobj; 1031 1032 res = TEE_ERROR_BAD_PARAMETERS; 1033 arg = mobj_get_va(mobj, offset, sizeof(*arg)); 1034 if (!arg) 1035 goto out_dec_map; 1036 1037 num_params = READ_ONCE(arg->num_params); 1038 if (num_params > OPTEE_MSG_MAX_NUM_PARAMS) 1039 goto out_dec_map; 1040 1041 sz = OPTEE_MSG_GET_ARG_SIZE(num_params); 1042 1043 thr->rpc_arg = mobj_get_va(mobj, offset + sz, sz_rpc); 1044 if (!thr->rpc_arg) 1045 goto out_dec_map; 1046 1047 res = tee_entry_std(arg, num_params); 1048 1049 thread_rpc_shm_cache_clear(&thr->shm_cache); 1050 thr->rpc_arg = NULL; 1051 1052 out_dec_map: 1053 mobj_dec_map(mobj); 1054 out_put_mobj: 1055 mobj_put(mobj); 1056 return res; 1057 } 1058 1059 /* 1060 * Helper routine for the assembly function thread_std_smc_entry() 1061 * 1062 * Note: this function is weak just to make it possible to exclude it from 1063 * the unpaged area. 1064 */ 1065 uint32_t __weak __thread_std_smc_entry(uint32_t a0, uint32_t a1, 1066 uint32_t a2, uint32_t a3, 1067 uint32_t a4, uint32_t a5 __unused) 1068 { 1069 /* 1070 * Arguments are supplied from handle_yielding_call() as: 1071 * a0 <- w1 1072 * a1 <- w3 1073 * a2 <- w4 1074 * a3 <- w5 1075 * a4 <- w6 1076 * a5 <- w7 1077 */ 1078 thread_get_tsd()->rpc_target_info = swap_src_dst(a0); 1079 if (a1 == OPTEE_FFA_YIELDING_CALL_WITH_ARG) 1080 return yielding_call_with_arg(reg_pair_to_64(a3, a2), a4); 1081 return FFA_DENIED; 1082 } 1083 1084 static bool set_fmem(struct optee_msg_param *param, struct thread_param *tpm) 1085 { 1086 uint64_t offs = tpm->u.memref.offs; 1087 1088 param->attr = tpm->attr - THREAD_PARAM_ATTR_MEMREF_IN + 1089 OPTEE_MSG_ATTR_TYPE_FMEM_INPUT; 1090 1091 param->u.fmem.offs_low = offs; 1092 param->u.fmem.offs_high = offs >> 32; 1093 if (param->u.fmem.offs_high != offs >> 32) 1094 return false; 1095 1096 param->u.fmem.size = tpm->u.memref.size; 1097 if (tpm->u.memref.mobj) { 1098 uint64_t cookie = mobj_get_cookie(tpm->u.memref.mobj); 1099 1100 /* If a mobj is passed it better be one with a valid cookie. */ 1101 if (cookie == OPTEE_MSG_FMEM_INVALID_GLOBAL_ID) 1102 return false; 1103 param->u.fmem.global_id = cookie; 1104 } else { 1105 param->u.fmem.global_id = OPTEE_MSG_FMEM_INVALID_GLOBAL_ID; 1106 } 1107 1108 return true; 1109 } 1110 1111 static uint32_t get_rpc_arg(uint32_t cmd, size_t num_params, 1112 struct thread_param *params, 1113 struct optee_msg_arg **arg_ret) 1114 { 1115 size_t sz = OPTEE_MSG_GET_ARG_SIZE(THREAD_RPC_MAX_NUM_PARAMS); 1116 struct thread_ctx *thr = threads + thread_get_id(); 1117 struct optee_msg_arg *arg = thr->rpc_arg; 1118 1119 if (num_params > THREAD_RPC_MAX_NUM_PARAMS) 1120 return TEE_ERROR_BAD_PARAMETERS; 1121 1122 if (!arg) { 1123 EMSG("rpc_arg not set"); 1124 return TEE_ERROR_GENERIC; 1125 } 1126 1127 memset(arg, 0, sz); 1128 arg->cmd = cmd; 1129 arg->num_params = num_params; 1130 arg->ret = TEE_ERROR_GENERIC; /* in case value isn't updated */ 1131 1132 for (size_t n = 0; n < num_params; n++) { 1133 switch (params[n].attr) { 1134 case THREAD_PARAM_ATTR_NONE: 1135 arg->params[n].attr = OPTEE_MSG_ATTR_TYPE_NONE; 1136 break; 1137 case THREAD_PARAM_ATTR_VALUE_IN: 1138 case THREAD_PARAM_ATTR_VALUE_OUT: 1139 case THREAD_PARAM_ATTR_VALUE_INOUT: 1140 arg->params[n].attr = params[n].attr - 1141 THREAD_PARAM_ATTR_VALUE_IN + 1142 OPTEE_MSG_ATTR_TYPE_VALUE_INPUT; 1143 arg->params[n].u.value.a = params[n].u.value.a; 1144 arg->params[n].u.value.b = params[n].u.value.b; 1145 arg->params[n].u.value.c = params[n].u.value.c; 1146 break; 1147 case THREAD_PARAM_ATTR_MEMREF_IN: 1148 case THREAD_PARAM_ATTR_MEMREF_OUT: 1149 case THREAD_PARAM_ATTR_MEMREF_INOUT: 1150 if (!set_fmem(arg->params + n, params + n)) 1151 return TEE_ERROR_BAD_PARAMETERS; 1152 break; 1153 default: 1154 return TEE_ERROR_BAD_PARAMETERS; 1155 } 1156 } 1157 1158 if (arg_ret) 1159 *arg_ret = arg; 1160 1161 return TEE_SUCCESS; 1162 } 1163 1164 static uint32_t get_rpc_arg_res(struct optee_msg_arg *arg, size_t num_params, 1165 struct thread_param *params) 1166 { 1167 for (size_t n = 0; n < num_params; n++) { 1168 switch (params[n].attr) { 1169 case THREAD_PARAM_ATTR_VALUE_OUT: 1170 case THREAD_PARAM_ATTR_VALUE_INOUT: 1171 params[n].u.value.a = arg->params[n].u.value.a; 1172 params[n].u.value.b = arg->params[n].u.value.b; 1173 params[n].u.value.c = arg->params[n].u.value.c; 1174 break; 1175 case THREAD_PARAM_ATTR_MEMREF_OUT: 1176 case THREAD_PARAM_ATTR_MEMREF_INOUT: 1177 params[n].u.memref.size = arg->params[n].u.fmem.size; 1178 break; 1179 default: 1180 break; 1181 } 1182 } 1183 1184 return arg->ret; 1185 } 1186 1187 uint32_t thread_rpc_cmd(uint32_t cmd, size_t num_params, 1188 struct thread_param *params) 1189 { 1190 struct thread_rpc_arg rpc_arg = { .call = { 1191 .w1 = thread_get_tsd()->rpc_target_info, 1192 .w4 = OPTEE_FFA_YIELDING_CALL_RETURN_RPC_CMD, 1193 }, 1194 }; 1195 struct optee_msg_arg *arg = NULL; 1196 uint32_t ret = 0; 1197 1198 ret = get_rpc_arg(cmd, num_params, params, &arg); 1199 if (ret) 1200 return ret; 1201 1202 thread_rpc(&rpc_arg); 1203 1204 return get_rpc_arg_res(arg, num_params, params); 1205 } 1206 1207 static void thread_rpc_free(unsigned int bt, uint64_t cookie, struct mobj *mobj) 1208 { 1209 struct thread_rpc_arg rpc_arg = { .call = { 1210 .w1 = thread_get_tsd()->rpc_target_info, 1211 .w4 = OPTEE_FFA_YIELDING_CALL_RETURN_RPC_CMD, 1212 }, 1213 }; 1214 struct thread_param param = THREAD_PARAM_VALUE(IN, bt, cookie, 0); 1215 uint32_t res2 = 0; 1216 uint32_t res = 0; 1217 1218 DMSG("freeing cookie %#"PRIx64, cookie); 1219 1220 res = get_rpc_arg(OPTEE_RPC_CMD_SHM_FREE, 1, ¶m, NULL); 1221 1222 mobj_put(mobj); 1223 res2 = mobj_ffa_unregister_by_cookie(cookie); 1224 if (res2) 1225 DMSG("mobj_ffa_unregister_by_cookie(%#"PRIx64"): %#"PRIx32, 1226 cookie, res2); 1227 if (!res) 1228 thread_rpc(&rpc_arg); 1229 } 1230 1231 static struct mobj *thread_rpc_alloc(size_t size, size_t align, unsigned int bt) 1232 { 1233 struct thread_rpc_arg rpc_arg = { .call = { 1234 .w1 = thread_get_tsd()->rpc_target_info, 1235 .w4 = OPTEE_FFA_YIELDING_CALL_RETURN_RPC_CMD, 1236 }, 1237 }; 1238 struct thread_param param = THREAD_PARAM_VALUE(IN, bt, size, align); 1239 struct optee_msg_arg *arg = NULL; 1240 unsigned int internal_offset = 0; 1241 struct mobj *mobj = NULL; 1242 uint64_t cookie = 0; 1243 1244 if (get_rpc_arg(OPTEE_RPC_CMD_SHM_ALLOC, 1, ¶m, &arg)) 1245 return NULL; 1246 1247 thread_rpc(&rpc_arg); 1248 1249 if (arg->num_params != 1 || 1250 arg->params->attr != OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT) 1251 return NULL; 1252 1253 internal_offset = READ_ONCE(arg->params->u.fmem.internal_offs); 1254 cookie = READ_ONCE(arg->params->u.fmem.global_id); 1255 mobj = mobj_ffa_get_by_cookie(cookie, internal_offset); 1256 if (!mobj) { 1257 DMSG("mobj_ffa_get_by_cookie(%#"PRIx64", %#x): failed", 1258 cookie, internal_offset); 1259 return NULL; 1260 } 1261 1262 assert(mobj_is_nonsec(mobj)); 1263 1264 if (mobj->size < size) { 1265 DMSG("Mobj %#"PRIx64": wrong size", cookie); 1266 mobj_put(mobj); 1267 return NULL; 1268 } 1269 1270 if (mobj_inc_map(mobj)) { 1271 DMSG("mobj_inc_map(%#"PRIx64"): failed", cookie); 1272 mobj_put(mobj); 1273 return NULL; 1274 } 1275 1276 return mobj; 1277 } 1278 1279 struct mobj *thread_rpc_alloc_payload(size_t size) 1280 { 1281 return thread_rpc_alloc(size, 8, OPTEE_RPC_SHM_TYPE_APPL); 1282 } 1283 1284 struct mobj *thread_rpc_alloc_kernel_payload(size_t size) 1285 { 1286 return thread_rpc_alloc(size, 8, OPTEE_RPC_SHM_TYPE_KERNEL); 1287 } 1288 1289 void thread_rpc_free_kernel_payload(struct mobj *mobj) 1290 { 1291 thread_rpc_free(OPTEE_RPC_SHM_TYPE_KERNEL, mobj_get_cookie(mobj), mobj); 1292 } 1293 1294 void thread_rpc_free_payload(struct mobj *mobj) 1295 { 1296 thread_rpc_free(OPTEE_RPC_SHM_TYPE_APPL, mobj_get_cookie(mobj), 1297 mobj); 1298 } 1299 1300 struct mobj *thread_rpc_alloc_global_payload(size_t size) 1301 { 1302 return thread_rpc_alloc(size, 8, OPTEE_RPC_SHM_TYPE_GLOBAL); 1303 } 1304 1305 void thread_rpc_free_global_payload(struct mobj *mobj) 1306 { 1307 thread_rpc_free(OPTEE_RPC_SHM_TYPE_GLOBAL, mobj_get_cookie(mobj), 1308 mobj); 1309 } 1310 1311 void thread_spmc_register_secondary_ep(vaddr_t ep) 1312 { 1313 unsigned long ret = 0; 1314 1315 /* Let the SPM know the entry point for secondary CPUs */ 1316 ret = thread_smc(FFA_SECONDARY_EP_REGISTER_64, ep, 0, 0); 1317 1318 if (ret != FFA_SUCCESS_32 && ret != FFA_SUCCESS_64) 1319 EMSG("FFA_SECONDARY_EP_REGISTER_64 ret %#lx", ret); 1320 } 1321 1322 #if defined(CFG_CORE_SEL1_SPMC) 1323 static TEE_Result spmc_init(void) 1324 { 1325 my_endpoint_id = SPMC_ENDPOINT_ID; 1326 DMSG("My endpoint ID %#x", my_endpoint_id); 1327 1328 return TEE_SUCCESS; 1329 } 1330 #else /* !defined(CFG_CORE_SEL1_SPMC) */ 1331 static bool is_ffa_success(uint32_t fid) 1332 { 1333 #ifdef ARM64 1334 if (fid == FFA_SUCCESS_64) 1335 return true; 1336 #endif 1337 return fid == FFA_SUCCESS_32; 1338 } 1339 1340 static void spmc_rxtx_map(struct ffa_rxtx *rxtx) 1341 { 1342 struct thread_smc_args args = { 1343 #ifdef ARM64 1344 .a0 = FFA_RXTX_MAP_64, 1345 #else 1346 .a0 = FFA_RXTX_MAP_32, 1347 #endif 1348 .a1 = virt_to_phys(rxtx->tx), 1349 .a2 = virt_to_phys(rxtx->rx), 1350 .a3 = 1, 1351 }; 1352 1353 thread_smccc(&args); 1354 if (!is_ffa_success(args.a0)) { 1355 if (args.a0 == FFA_ERROR) 1356 EMSG("rxtx map failed with error %ld", args.a2); 1357 else 1358 EMSG("rxtx map failed"); 1359 panic(); 1360 } 1361 } 1362 1363 static uint16_t spmc_get_id(void) 1364 { 1365 struct thread_smc_args args = { 1366 .a0 = FFA_ID_GET, 1367 }; 1368 1369 thread_smccc(&args); 1370 if (!is_ffa_success(args.a0)) { 1371 if (args.a0 == FFA_ERROR) 1372 EMSG("Get id failed with error %ld", args.a2); 1373 else 1374 EMSG("Get id failed"); 1375 panic(); 1376 } 1377 1378 return args.a2; 1379 } 1380 1381 static struct ffa_mem_transaction *spmc_retrieve_req(uint64_t cookie) 1382 { 1383 struct ffa_mem_transaction *trans_descr = nw_rxtx.tx; 1384 struct ffa_mem_access *acc_descr_array = NULL; 1385 struct ffa_mem_access_perm *perm_descr = NULL; 1386 size_t size = sizeof(*trans_descr) + 1387 1 * sizeof(struct ffa_mem_access); 1388 struct thread_smc_args args = { 1389 .a0 = FFA_MEM_RETRIEVE_REQ_32, 1390 .a1 = size, /* Total Length */ 1391 .a2 = size, /* Frag Length == Total length */ 1392 .a3 = 0, /* Address, Using TX -> MBZ */ 1393 .a4 = 0, /* Using TX -> MBZ */ 1394 }; 1395 1396 memset(trans_descr, 0, size); 1397 trans_descr->sender_id = thread_get_tsd()->rpc_target_info; 1398 trans_descr->mem_reg_attr = FFA_NORMAL_MEM_REG_ATTR; 1399 trans_descr->global_handle = cookie; 1400 trans_descr->flags = FFA_MEMORY_REGION_TRANSACTION_TYPE_SHARE | 1401 FFA_MEMORY_REGION_FLAG_ANY_ALIGNMENT; 1402 trans_descr->mem_access_count = 1; 1403 acc_descr_array = trans_descr->mem_access_array; 1404 acc_descr_array->region_offs = 0; 1405 acc_descr_array->reserved = 0; 1406 perm_descr = &acc_descr_array->access_perm; 1407 perm_descr->endpoint_id = my_endpoint_id; 1408 perm_descr->perm = FFA_MEM_ACC_RW; 1409 perm_descr->flags = 0; 1410 1411 thread_smccc(&args); 1412 if (args.a0 != FFA_MEM_RETRIEVE_RESP) { 1413 if (args.a0 == FFA_ERROR) 1414 EMSG("Failed to fetch cookie %#"PRIx64" error code %d", 1415 cookie, (int)args.a2); 1416 else 1417 EMSG("Failed to fetch cookie %#"PRIx64" a0 %#"PRIx64, 1418 cookie, args.a0); 1419 return NULL; 1420 } 1421 1422 return nw_rxtx.rx; 1423 } 1424 1425 void thread_spmc_relinquish(uint64_t cookie) 1426 { 1427 struct ffa_mem_relinquish *relinquish_desc = nw_rxtx.tx; 1428 struct thread_smc_args args = { 1429 .a0 = FFA_MEM_RELINQUISH, 1430 }; 1431 1432 memset(relinquish_desc, 0, sizeof(*relinquish_desc)); 1433 relinquish_desc->handle = cookie; 1434 relinquish_desc->flags = 0; 1435 relinquish_desc->endpoint_count = 1; 1436 relinquish_desc->endpoint_id_array[0] = my_endpoint_id; 1437 thread_smccc(&args); 1438 if (!is_ffa_success(args.a0)) 1439 EMSG("Failed to relinquish cookie %#"PRIx64, cookie); 1440 } 1441 1442 static int set_pages(struct ffa_address_range *regions, 1443 unsigned int num_regions, unsigned int num_pages, 1444 struct mobj_ffa *mf) 1445 { 1446 unsigned int n = 0; 1447 unsigned int idx = 0; 1448 1449 for (n = 0; n < num_regions; n++) { 1450 unsigned int page_count = READ_ONCE(regions[n].page_count); 1451 uint64_t addr = READ_ONCE(regions[n].address); 1452 1453 if (mobj_ffa_add_pages_at(mf, &idx, addr, page_count)) 1454 return FFA_INVALID_PARAMETERS; 1455 } 1456 1457 if (idx != num_pages) 1458 return FFA_INVALID_PARAMETERS; 1459 1460 return 0; 1461 } 1462 1463 struct mobj_ffa *thread_spmc_populate_mobj_from_rx(uint64_t cookie) 1464 { 1465 struct mobj_ffa *ret = NULL; 1466 struct ffa_mem_transaction *retrieve_desc = NULL; 1467 struct ffa_mem_access *descr_array = NULL; 1468 struct ffa_mem_region *descr = NULL; 1469 struct mobj_ffa *mf = NULL; 1470 unsigned int num_pages = 0; 1471 unsigned int offs = 0; 1472 struct thread_smc_args ffa_rx_release_args = { 1473 .a0 = FFA_RX_RELEASE 1474 }; 1475 1476 /* 1477 * OP-TEE is only supporting a single mem_region while the 1478 * specification allows for more than one. 1479 */ 1480 retrieve_desc = spmc_retrieve_req(cookie); 1481 if (!retrieve_desc) { 1482 EMSG("Failed to retrieve cookie from rx buffer %#"PRIx64, 1483 cookie); 1484 return NULL; 1485 } 1486 1487 descr_array = retrieve_desc->mem_access_array; 1488 offs = READ_ONCE(descr_array->region_offs); 1489 descr = (struct ffa_mem_region *)((vaddr_t)retrieve_desc + offs); 1490 1491 num_pages = READ_ONCE(descr->total_page_count); 1492 mf = mobj_ffa_spmc_new(cookie, num_pages); 1493 if (!mf) 1494 goto out; 1495 1496 if (set_pages(descr->address_range_array, 1497 READ_ONCE(descr->address_range_count), num_pages, mf)) { 1498 mobj_ffa_spmc_delete(mf); 1499 goto out; 1500 } 1501 1502 ret = mf; 1503 1504 out: 1505 /* Release RX buffer after the mem retrieve request. */ 1506 thread_smccc(&ffa_rx_release_args); 1507 1508 return ret; 1509 } 1510 1511 static TEE_Result spmc_init(void) 1512 { 1513 spmc_rxtx_map(&nw_rxtx); 1514 my_endpoint_id = spmc_get_id(); 1515 DMSG("My endpoint ID %#x", my_endpoint_id); 1516 1517 return TEE_SUCCESS; 1518 } 1519 #endif /* !defined(CFG_CORE_SEL1_SPMC) */ 1520 1521 service_init(spmc_init); 1522