Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2022, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | #include <errno.h> |
| 7 | |
| 8 | #include <common/debug.h> |
| 9 | #include <common/runtime_svc.h> |
| 10 | #include <lib/object_pool.h> |
| 11 | #include <lib/spinlock.h> |
| 12 | #include <lib/xlat_tables/xlat_tables_v2.h> |
| 13 | #include <services/ffa_svc.h> |
| 14 | #include "spmc.h" |
| 15 | #include "spmc_shared_mem.h" |
| 16 | |
| 17 | #include <platform_def.h> |
| 18 | |
| 19 | /** |
| 20 | * struct spmc_shmem_obj - Shared memory object. |
| 21 | * @desc_size: Size of @desc. |
| 22 | * @desc_filled: Size of @desc already received. |
| 23 | * @in_use: Number of clients that have called ffa_mem_retrieve_req |
| 24 | * without a matching ffa_mem_relinquish call. |
| 25 | * @desc: FF-A memory region descriptor passed in ffa_mem_share. |
| 26 | */ |
| 27 | struct spmc_shmem_obj { |
| 28 | size_t desc_size; |
| 29 | size_t desc_filled; |
| 30 | size_t in_use; |
| 31 | struct ffa_mtd_v1_0 desc; |
| 32 | }; |
| 33 | |
| 34 | /* |
| 35 | * Declare our data structure to store the metadata of memory share requests. |
| 36 | * The main datastore is allocated on a per platform basis to ensure enough |
| 37 | * storage can be made available. |
| 38 | * The address of the data store will be populated by the SPMC during its |
| 39 | * initialization. |
| 40 | */ |
| 41 | |
| 42 | struct spmc_shmem_obj_state spmc_shmem_obj_state = { |
| 43 | /* Set start value for handle so top 32 bits are needed quickly. */ |
| 44 | .next_handle = 0xffffffc0U, |
| 45 | }; |
| 46 | |
| 47 | /** |
| 48 | * spmc_shmem_obj_size - Convert from descriptor size to object size. |
| 49 | * @desc_size: Size of struct ffa_memory_region_descriptor object. |
| 50 | * |
| 51 | * Return: Size of struct spmc_shmem_obj object. |
| 52 | */ |
| 53 | static size_t spmc_shmem_obj_size(size_t desc_size) |
| 54 | { |
| 55 | return desc_size + offsetof(struct spmc_shmem_obj, desc); |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * spmc_shmem_obj_alloc - Allocate struct spmc_shmem_obj. |
| 60 | * @state: Global state. |
| 61 | * @desc_size: Size of struct ffa_memory_region_descriptor object that |
| 62 | * allocated object will hold. |
| 63 | * |
| 64 | * Return: Pointer to newly allocated object, or %NULL if there not enough space |
| 65 | * left. The returned pointer is only valid while @state is locked, to |
| 66 | * used it again after unlocking @state, spmc_shmem_obj_lookup must be |
| 67 | * called. |
| 68 | */ |
| 69 | static struct spmc_shmem_obj * |
| 70 | spmc_shmem_obj_alloc(struct spmc_shmem_obj_state *state, size_t desc_size) |
| 71 | { |
| 72 | struct spmc_shmem_obj *obj; |
| 73 | size_t free = state->data_size - state->allocated; |
| 74 | |
| 75 | if (state->data == NULL) { |
| 76 | ERROR("Missing shmem datastore!\n"); |
| 77 | return NULL; |
| 78 | } |
| 79 | |
| 80 | if (spmc_shmem_obj_size(desc_size) > free) { |
| 81 | WARN("%s(0x%zx) failed, free 0x%zx\n", |
| 82 | __func__, desc_size, free); |
| 83 | return NULL; |
| 84 | } |
| 85 | obj = (struct spmc_shmem_obj *)(state->data + state->allocated); |
| 86 | obj->desc = (struct ffa_mtd_v1_0) {0}; |
| 87 | obj->desc_size = desc_size; |
| 88 | obj->desc_filled = 0; |
| 89 | obj->in_use = 0; |
| 90 | state->allocated += spmc_shmem_obj_size(desc_size); |
| 91 | return obj; |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * spmc_shmem_obj_free - Free struct spmc_shmem_obj. |
| 96 | * @state: Global state. |
| 97 | * @obj: Object to free. |
| 98 | * |
| 99 | * Release memory used by @obj. Other objects may move, so on return all |
| 100 | * pointers to struct spmc_shmem_obj object should be considered invalid, not |
| 101 | * just @obj. |
| 102 | * |
| 103 | * The current implementation always compacts the remaining objects to simplify |
| 104 | * the allocator and to avoid fragmentation. |
| 105 | */ |
| 106 | |
| 107 | static void spmc_shmem_obj_free(struct spmc_shmem_obj_state *state, |
| 108 | struct spmc_shmem_obj *obj) |
| 109 | { |
| 110 | size_t free_size = spmc_shmem_obj_size(obj->desc_size); |
| 111 | uint8_t *shift_dest = (uint8_t *)obj; |
| 112 | uint8_t *shift_src = shift_dest + free_size; |
| 113 | size_t shift_size = state->allocated - (shift_src - state->data); |
| 114 | |
| 115 | if (shift_size != 0U) { |
| 116 | memmove(shift_dest, shift_src, shift_size); |
| 117 | } |
| 118 | state->allocated -= free_size; |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * spmc_shmem_obj_lookup - Lookup struct spmc_shmem_obj by handle. |
| 123 | * @state: Global state. |
| 124 | * @handle: Unique handle of object to return. |
| 125 | * |
| 126 | * Return: struct spmc_shmem_obj_state object with handle matching @handle. |
| 127 | * %NULL, if not object in @state->data has a matching handle. |
| 128 | */ |
| 129 | static struct spmc_shmem_obj * |
| 130 | spmc_shmem_obj_lookup(struct spmc_shmem_obj_state *state, uint64_t handle) |
| 131 | { |
| 132 | uint8_t *curr = state->data; |
| 133 | |
| 134 | while (curr - state->data < state->allocated) { |
| 135 | struct spmc_shmem_obj *obj = (struct spmc_shmem_obj *)curr; |
| 136 | |
| 137 | if (obj->desc.handle == handle) { |
| 138 | return obj; |
| 139 | } |
| 140 | curr += spmc_shmem_obj_size(obj->desc_size); |
| 141 | } |
| 142 | return NULL; |
| 143 | } |
| 144 | |
| 145 | static struct ffa_comp_mrd * |
| 146 | spmc_shmem_obj_get_comp_mrd(struct spmc_shmem_obj *obj) |
| 147 | { |
| 148 | return (struct ffa_comp_mrd *) |
| 149 | ((uint8_t *)(&obj->desc) + obj->desc.emad[0].comp_mrd_offset); |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * spmc_shmem_obj_ffa_constituent_size - Calculate variable size part of obj. |
| 154 | * @obj: Object containing ffa_memory_region_descriptor. |
| 155 | * |
| 156 | * Return: Size of ffa_constituent_memory_region_descriptors in @obj. |
| 157 | */ |
| 158 | static size_t |
| 159 | spmc_shmem_obj_ffa_constituent_size(struct spmc_shmem_obj *obj) |
| 160 | { |
| 161 | return spmc_shmem_obj_get_comp_mrd(obj)->address_range_count * |
| 162 | sizeof(struct ffa_cons_mrd); |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * spmc_shmem_check_obj - Check that counts in descriptor match overall size. |
| 167 | * @obj: Object containing ffa_memory_region_descriptor. |
| 168 | * |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame^] | 169 | * Return: 0 if object is valid, -EINVAL if constituent_memory_region_descriptor |
| 170 | * offset or count is invalid. |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 171 | */ |
| 172 | static int spmc_shmem_check_obj(struct spmc_shmem_obj *obj) |
| 173 | { |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame^] | 174 | if (obj->desc.emad_count == 0U) { |
| 175 | WARN("%s: unsupported attribute desc count %u.\n", |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 176 | __func__, obj->desc.emad_count); |
| 177 | return -EINVAL; |
| 178 | } |
| 179 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame^] | 180 | /* |
| 181 | * Ensure the emad array lies within the bounds of the descriptor by |
| 182 | * checking the address of the element past the end of the array. |
| 183 | */ |
| 184 | if ((uintptr_t) &obj->desc.emad[obj->desc.emad_count] > |
| 185 | (uintptr_t)((uint8_t *) &obj->desc + obj->desc_size)) { |
| 186 | WARN("Invalid emad access.\n"); |
| 187 | return -EINVAL; |
| 188 | } |
| 189 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 190 | for (size_t emad_num = 0; emad_num < obj->desc.emad_count; emad_num++) { |
| 191 | size_t size; |
| 192 | size_t count; |
| 193 | size_t expected_size; |
| 194 | size_t total_page_count; |
| 195 | struct ffa_comp_mrd *comp; |
| 196 | |
| 197 | uint32_t offset = obj->desc.emad[emad_num].comp_mrd_offset; |
| 198 | size_t header_emad_size = sizeof(obj->desc) + |
| 199 | obj->desc.emad_count * sizeof(obj->desc.emad[emad_num]); |
| 200 | |
| 201 | if (offset < header_emad_size) { |
| 202 | WARN("%s: invalid object, offset %u < header + emad %zu\n", |
| 203 | __func__, offset, header_emad_size); |
| 204 | return -EINVAL; |
| 205 | } |
| 206 | |
| 207 | size = obj->desc_size; |
| 208 | |
| 209 | if (offset > size) { |
| 210 | WARN("%s: invalid object, offset %u > total size %zu\n", |
| 211 | __func__, offset, obj->desc_size); |
| 212 | return -EINVAL; |
| 213 | } |
| 214 | size -= offset; |
| 215 | |
| 216 | if (size < sizeof(struct ffa_comp_mrd)) { |
| 217 | WARN("%s: invalid object, offset %u, total size %zu, no header space.\n", |
| 218 | __func__, offset, obj->desc_size); |
| 219 | return -EINVAL; |
| 220 | } |
| 221 | size -= sizeof(struct ffa_comp_mrd); |
| 222 | |
| 223 | count = size / sizeof(struct ffa_cons_mrd); |
| 224 | |
| 225 | comp = spmc_shmem_obj_get_comp_mrd(obj); |
| 226 | |
| 227 | if (comp->address_range_count != count) { |
| 228 | WARN("%s: invalid object, desc count %u != %zu\n", |
| 229 | __func__, comp->address_range_count, count); |
| 230 | return -EINVAL; |
| 231 | } |
| 232 | |
| 233 | expected_size = offset + sizeof(*comp) + |
| 234 | spmc_shmem_obj_ffa_constituent_size(obj); |
| 235 | if (expected_size != obj->desc_size) { |
| 236 | WARN("%s: invalid object, computed size %zu != size %zu\n", |
| 237 | __func__, expected_size, obj->desc_size); |
| 238 | return -EINVAL; |
| 239 | } |
| 240 | |
| 241 | if (obj->desc_filled < obj->desc_size) { |
| 242 | /* |
| 243 | * The whole descriptor has not yet been received. |
| 244 | * Skip final checks. |
| 245 | */ |
| 246 | return 0; |
| 247 | } |
| 248 | |
| 249 | total_page_count = 0; |
| 250 | |
| 251 | for (size_t i = 0; i < count; i++) { |
| 252 | total_page_count += |
| 253 | comp->address_range_array[i].page_count; |
| 254 | } |
| 255 | if (comp->total_page_count != total_page_count) { |
| 256 | WARN("%s: invalid object, desc total_page_count %u != %zu\n", |
| 257 | __func__, comp->total_page_count, |
| 258 | total_page_count); |
| 259 | return -EINVAL; |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | static long spmc_ffa_fill_desc(struct mailbox *mbox, |
| 267 | struct spmc_shmem_obj *obj, |
| 268 | uint32_t fragment_length, |
| 269 | ffa_mtd_flag32_t mtd_flag, |
| 270 | void *smc_handle) |
| 271 | { |
| 272 | int ret; |
| 273 | uint32_t handle_low; |
| 274 | uint32_t handle_high; |
| 275 | |
| 276 | if (mbox->rxtx_page_count == 0U) { |
| 277 | WARN("%s: buffer pair not registered.\n", __func__); |
| 278 | ret = -EINVAL; |
| 279 | goto err_arg; |
| 280 | } |
| 281 | |
| 282 | if (fragment_length > mbox->rxtx_page_count * PAGE_SIZE_4KB) { |
| 283 | WARN("%s: bad fragment size %u > %u buffer size\n", __func__, |
| 284 | fragment_length, mbox->rxtx_page_count * PAGE_SIZE_4KB); |
| 285 | ret = -EINVAL; |
| 286 | goto err_arg; |
| 287 | } |
| 288 | |
| 289 | memcpy((uint8_t *)&obj->desc + obj->desc_filled, |
| 290 | (uint8_t *) mbox->tx_buffer, |
| 291 | fragment_length); |
| 292 | |
| 293 | if (fragment_length > obj->desc_size - obj->desc_filled) { |
| 294 | WARN("%s: bad fragment size %u > %zu remaining\n", __func__, |
| 295 | fragment_length, obj->desc_size - obj->desc_filled); |
| 296 | ret = -EINVAL; |
| 297 | goto err_arg; |
| 298 | } |
| 299 | |
| 300 | /* Ensure that the sender ID resides in the normal world. */ |
| 301 | if (ffa_is_secure_world_id(obj->desc.sender_id)) { |
| 302 | WARN("%s: Invalid sender ID 0x%x.\n", |
| 303 | __func__, obj->desc.sender_id); |
| 304 | ret = FFA_ERROR_DENIED; |
| 305 | goto err_arg; |
| 306 | } |
| 307 | |
| 308 | /* |
| 309 | * We don't currently support any optional flags so ensure none are |
| 310 | * requested. |
| 311 | */ |
| 312 | if (obj->desc.flags != 0U && mtd_flag != 0U && |
| 313 | (obj->desc.flags != mtd_flag)) { |
| 314 | WARN("%s: invalid memory transaction flags %u != %u\n", |
| 315 | __func__, obj->desc.flags, mtd_flag); |
| 316 | ret = -EINVAL; |
| 317 | goto err_arg; |
| 318 | } |
| 319 | |
| 320 | if (obj->desc_filled == 0U) { |
| 321 | /* First fragment, descriptor header has been copied */ |
| 322 | obj->desc.handle = spmc_shmem_obj_state.next_handle++; |
| 323 | obj->desc.flags |= mtd_flag; |
| 324 | } |
| 325 | |
| 326 | obj->desc_filled += fragment_length; |
| 327 | |
| 328 | ret = spmc_shmem_check_obj(obj); |
| 329 | if (ret != 0) { |
| 330 | goto err_bad_desc; |
| 331 | } |
| 332 | |
| 333 | handle_low = (uint32_t)obj->desc.handle; |
| 334 | handle_high = obj->desc.handle >> 32; |
| 335 | |
| 336 | if (obj->desc_filled != obj->desc_size) { |
| 337 | SMC_RET8(smc_handle, FFA_MEM_FRAG_RX, handle_low, |
| 338 | handle_high, obj->desc_filled, |
| 339 | (uint32_t)obj->desc.sender_id << 16, 0, 0, 0); |
| 340 | } |
| 341 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame^] | 342 | /* The full descriptor has been received, perform any final checks. */ |
| 343 | |
| 344 | /* |
| 345 | * If a partition ID resides in the secure world validate that the |
| 346 | * partition ID is for a known partition. Ignore any partition ID |
| 347 | * belonging to the normal world as it is assumed the Hypervisor will |
| 348 | * have validated these. |
| 349 | */ |
| 350 | for (size_t i = 0; i < obj->desc.emad_count; i++) { |
| 351 | ffa_endpoint_id16_t ep_id = obj->desc.emad[i].mapd.endpoint_id; |
| 352 | |
| 353 | if (ffa_is_secure_world_id(ep_id)) { |
| 354 | if (spmc_get_sp_ctx(ep_id) == NULL) { |
| 355 | WARN("%s: Invalid receiver id 0x%x\n", |
| 356 | __func__, ep_id); |
| 357 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 358 | goto err_bad_desc; |
| 359 | } |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | /* Ensure partition IDs are not duplicated. */ |
| 364 | for (size_t i = 0; i < obj->desc.emad_count; i++) { |
| 365 | for (size_t j = i + 1; j < obj->desc.emad_count; j++) { |
| 366 | if (obj->desc.emad[i].mapd.endpoint_id == |
| 367 | obj->desc.emad[j].mapd.endpoint_id) { |
| 368 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 369 | goto err_bad_desc; |
| 370 | } |
| 371 | } |
| 372 | } |
| 373 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 374 | SMC_RET8(smc_handle, FFA_SUCCESS_SMC32, 0, handle_low, handle_high, 0, |
| 375 | 0, 0, 0); |
| 376 | |
| 377 | err_bad_desc: |
| 378 | err_arg: |
| 379 | spmc_shmem_obj_free(&spmc_shmem_obj_state, obj); |
| 380 | return spmc_ffa_error_return(smc_handle, FFA_ERROR_INVALID_PARAMETER); |
| 381 | } |
| 382 | |
| 383 | /** |
| 384 | * spmc_ffa_mem_send - FFA_MEM_SHARE/LEND implementation. |
| 385 | * @client: Client state. |
| 386 | * @total_length: Total length of shared memory descriptor. |
| 387 | * @fragment_length: Length of fragment of shared memory descriptor passed in |
| 388 | * this call. |
| 389 | * @address: Not supported, must be 0. |
| 390 | * @page_count: Not supported, must be 0. |
| 391 | * @smc_handle: Handle passed to smc call. Used to return |
| 392 | * FFA_MEM_FRAG_RX or SMC_FC_FFA_SUCCESS. |
| 393 | * |
| 394 | * Implements a subset of the FF-A FFA_MEM_SHARE and FFA_MEM_LEND calls needed |
| 395 | * to share or lend memory from non-secure os to secure os (with no stream |
| 396 | * endpoints). |
| 397 | * |
| 398 | * Return: 0 on success, error code on failure. |
| 399 | */ |
| 400 | long spmc_ffa_mem_send(uint32_t smc_fid, |
| 401 | bool secure_origin, |
| 402 | uint64_t total_length, |
| 403 | uint32_t fragment_length, |
| 404 | uint64_t address, |
| 405 | uint32_t page_count, |
| 406 | void *cookie, |
| 407 | void *handle, |
| 408 | uint64_t flags) |
| 409 | |
| 410 | { |
| 411 | long ret; |
| 412 | struct spmc_shmem_obj *obj; |
| 413 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 414 | ffa_mtd_flag32_t mtd_flag; |
| 415 | |
| 416 | if (address != 0U || page_count != 0U) { |
| 417 | WARN("%s: custom memory region for message not supported.\n", |
| 418 | __func__); |
| 419 | return spmc_ffa_error_return(handle, |
| 420 | FFA_ERROR_INVALID_PARAMETER); |
| 421 | } |
| 422 | |
| 423 | if (secure_origin) { |
| 424 | WARN("%s: unsupported share direction.\n", __func__); |
| 425 | return spmc_ffa_error_return(handle, |
| 426 | FFA_ERROR_INVALID_PARAMETER); |
| 427 | } |
| 428 | |
| 429 | if (fragment_length < sizeof(obj->desc)) { |
| 430 | WARN("%s: bad first fragment size %u < %zu\n", |
| 431 | __func__, fragment_length, sizeof(obj->desc)); |
| 432 | return spmc_ffa_error_return(handle, |
| 433 | FFA_ERROR_INVALID_PARAMETER); |
| 434 | } |
| 435 | |
| 436 | if ((smc_fid & FUNCID_NUM_MASK) == FFA_FNUM_MEM_SHARE) { |
| 437 | mtd_flag = FFA_MTD_FLAG_TYPE_SHARE_MEMORY; |
| 438 | } else if ((smc_fid & FUNCID_NUM_MASK) == FFA_FNUM_MEM_LEND) { |
| 439 | mtd_flag = FFA_MTD_FLAG_TYPE_LEND_MEMORY; |
| 440 | } else { |
| 441 | WARN("%s: invalid memory management operation.\n", __func__); |
| 442 | return spmc_ffa_error_return(handle, |
| 443 | FFA_ERROR_INVALID_PARAMETER); |
| 444 | } |
| 445 | |
| 446 | spin_lock(&spmc_shmem_obj_state.lock); |
| 447 | |
| 448 | obj = spmc_shmem_obj_alloc(&spmc_shmem_obj_state, total_length); |
| 449 | if (obj == NULL) { |
| 450 | ret = FFA_ERROR_NO_MEMORY; |
| 451 | goto err_unlock; |
| 452 | } |
| 453 | |
| 454 | spin_lock(&mbox->lock); |
| 455 | ret = spmc_ffa_fill_desc(mbox, obj, fragment_length, mtd_flag, handle); |
| 456 | spin_unlock(&mbox->lock); |
| 457 | |
| 458 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 459 | return ret; |
| 460 | |
| 461 | err_unlock: |
| 462 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 463 | return spmc_ffa_error_return(handle, ret); |
| 464 | } |
| 465 | |
| 466 | /** |
| 467 | * spmc_ffa_mem_frag_tx - FFA_MEM_FRAG_TX implementation. |
| 468 | * @client: Client state. |
| 469 | * @handle_low: Handle_low value returned from FFA_MEM_FRAG_RX. |
| 470 | * @handle_high: Handle_high value returned from FFA_MEM_FRAG_RX. |
| 471 | * @fragment_length: Length of fragments transmitted. |
| 472 | * @sender_id: Vmid of sender in bits [31:16] |
| 473 | * @smc_handle: Handle passed to smc call. Used to return |
| 474 | * FFA_MEM_FRAG_RX or SMC_FC_FFA_SUCCESS. |
| 475 | * |
| 476 | * Return: @smc_handle on success, error code on failure. |
| 477 | */ |
| 478 | long spmc_ffa_mem_frag_tx(uint32_t smc_fid, |
| 479 | bool secure_origin, |
| 480 | uint64_t handle_low, |
| 481 | uint64_t handle_high, |
| 482 | uint32_t fragment_length, |
| 483 | uint32_t sender_id, |
| 484 | void *cookie, |
| 485 | void *handle, |
| 486 | uint64_t flags) |
| 487 | { |
| 488 | long ret; |
| 489 | uint32_t desc_sender_id; |
| 490 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 491 | |
| 492 | struct spmc_shmem_obj *obj; |
| 493 | uint64_t mem_handle = handle_low | (((uint64_t)handle_high) << 32); |
| 494 | |
| 495 | spin_lock(&spmc_shmem_obj_state.lock); |
| 496 | |
| 497 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| 498 | if (obj == NULL) { |
| 499 | WARN("%s: invalid handle, 0x%lx, not a valid handle.\n", |
| 500 | __func__, mem_handle); |
| 501 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 502 | goto err_unlock; |
| 503 | } |
| 504 | |
| 505 | desc_sender_id = (uint32_t)obj->desc.sender_id << 16; |
| 506 | if (sender_id != desc_sender_id) { |
| 507 | WARN("%s: invalid sender_id 0x%x != 0x%x\n", __func__, |
| 508 | sender_id, desc_sender_id); |
| 509 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 510 | goto err_unlock; |
| 511 | } |
| 512 | |
| 513 | if (obj->desc_filled == obj->desc_size) { |
| 514 | WARN("%s: object desc already filled, %zu\n", __func__, |
| 515 | obj->desc_filled); |
| 516 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 517 | goto err_unlock; |
| 518 | } |
| 519 | |
| 520 | spin_lock(&mbox->lock); |
| 521 | ret = spmc_ffa_fill_desc(mbox, obj, fragment_length, 0, handle); |
| 522 | spin_unlock(&mbox->lock); |
| 523 | |
| 524 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 525 | return ret; |
| 526 | |
| 527 | err_unlock: |
| 528 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 529 | return spmc_ffa_error_return(handle, ret); |
| 530 | } |
| 531 | |
| 532 | /** |
| 533 | * spmc_ffa_mem_retrieve_req - FFA_MEM_RETRIEVE_REQ implementation. |
| 534 | * @smc_fid: FID of SMC |
| 535 | * @total_length: Total length of retrieve request descriptor if this is |
| 536 | * the first call. Otherwise (unsupported) must be 0. |
| 537 | * @fragment_length: Length of fragment of retrieve request descriptor passed |
| 538 | * in this call. Only @fragment_length == @length is |
| 539 | * supported by this implementation. |
| 540 | * @address: Not supported, must be 0. |
| 541 | * @page_count: Not supported, must be 0. |
| 542 | * @smc_handle: Handle passed to smc call. Used to return |
| 543 | * FFA_MEM_RETRIEVE_RESP. |
| 544 | * |
| 545 | * Implements a subset of the FF-A FFA_MEM_RETRIEVE_REQ call. |
| 546 | * Used by secure os to retrieve memory already shared by non-secure os. |
| 547 | * If the data does not fit in a single FFA_MEM_RETRIEVE_RESP message, |
| 548 | * the client must call FFA_MEM_FRAG_RX until the full response has been |
| 549 | * received. |
| 550 | * |
| 551 | * Return: @handle on success, error code on failure. |
| 552 | */ |
| 553 | long |
| 554 | spmc_ffa_mem_retrieve_req(uint32_t smc_fid, |
| 555 | bool secure_origin, |
| 556 | uint32_t total_length, |
| 557 | uint32_t fragment_length, |
| 558 | uint64_t address, |
| 559 | uint32_t page_count, |
| 560 | void *cookie, |
| 561 | void *handle, |
| 562 | uint64_t flags) |
| 563 | { |
| 564 | int ret; |
| 565 | size_t buf_size; |
| 566 | size_t copy_size; |
| 567 | struct ffa_mtd_v1_0 *resp; |
| 568 | const struct ffa_mtd_v1_0 *req; |
| 569 | struct spmc_shmem_obj *obj = NULL; |
| 570 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 571 | |
| 572 | if (!secure_origin) { |
| 573 | WARN("%s: unsupported retrieve req direction.\n", __func__); |
| 574 | return spmc_ffa_error_return(handle, |
| 575 | FFA_ERROR_INVALID_PARAMETER); |
| 576 | } |
| 577 | |
| 578 | if (address != 0U || page_count != 0U) { |
| 579 | WARN("%s: custom memory region not supported.\n", __func__); |
| 580 | return spmc_ffa_error_return(handle, |
| 581 | FFA_ERROR_INVALID_PARAMETER); |
| 582 | } |
| 583 | |
| 584 | spin_lock(&mbox->lock); |
| 585 | |
| 586 | req = mbox->tx_buffer; |
| 587 | resp = mbox->rx_buffer; |
| 588 | buf_size = mbox->rxtx_page_count * FFA_PAGE_SIZE; |
| 589 | |
| 590 | if (mbox->rxtx_page_count == 0U) { |
| 591 | WARN("%s: buffer pair not registered.\n", __func__); |
| 592 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 593 | goto err_unlock_mailbox; |
| 594 | } |
| 595 | |
| 596 | if (mbox->state != MAILBOX_STATE_EMPTY) { |
| 597 | WARN("%s: RX Buffer is full! %d\n", __func__, mbox->state); |
| 598 | ret = FFA_ERROR_DENIED; |
| 599 | goto err_unlock_mailbox; |
| 600 | } |
| 601 | |
| 602 | if (fragment_length != total_length) { |
| 603 | WARN("%s: fragmented retrieve request not supported.\n", |
| 604 | __func__); |
| 605 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 606 | goto err_unlock_mailbox; |
| 607 | } |
| 608 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame^] | 609 | if (req->emad_count == 0U) { |
| 610 | WARN("%s: unsupported attribute desc count %u.\n", |
| 611 | __func__, obj->desc.emad_count); |
| 612 | return -EINVAL; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 613 | } |
| 614 | |
| 615 | if (total_length < sizeof(*req)) { |
| 616 | WARN("%s: invalid length %u < %zu\n", __func__, total_length, |
| 617 | sizeof(*req)); |
| 618 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 619 | goto err_unlock_mailbox; |
| 620 | } |
| 621 | |
| 622 | spin_lock(&spmc_shmem_obj_state.lock); |
| 623 | |
| 624 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, req->handle); |
| 625 | if (obj == NULL) { |
| 626 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 627 | goto err_unlock_all; |
| 628 | } |
| 629 | |
| 630 | if (obj->desc_filled != obj->desc_size) { |
| 631 | WARN("%s: incomplete object desc filled %zu < size %zu\n", |
| 632 | __func__, obj->desc_filled, obj->desc_size); |
| 633 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 634 | goto err_unlock_all; |
| 635 | } |
| 636 | |
| 637 | if (req->emad_count != 0U && req->sender_id != obj->desc.sender_id) { |
| 638 | WARN("%s: wrong sender id 0x%x != 0x%x\n", |
| 639 | __func__, req->sender_id, obj->desc.sender_id); |
| 640 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 641 | goto err_unlock_all; |
| 642 | } |
| 643 | |
| 644 | if (req->emad_count != 0U && req->tag != obj->desc.tag) { |
| 645 | WARN("%s: wrong tag 0x%lx != 0x%lx\n", |
| 646 | __func__, req->tag, obj->desc.tag); |
| 647 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 648 | goto err_unlock_all; |
| 649 | } |
| 650 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame^] | 651 | if (req->emad_count != 0U && req->emad_count != obj->desc.emad_count) { |
| 652 | WARN("%s: mistmatch of endpoint counts %u != %u\n", |
| 653 | __func__, req->emad_count, obj->desc.emad_count); |
| 654 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 655 | goto err_unlock_all; |
| 656 | } |
| 657 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 658 | if (req->flags != 0U) { |
| 659 | if ((req->flags & FFA_MTD_FLAG_TYPE_MASK) != |
| 660 | (obj->desc.flags & FFA_MTD_FLAG_TYPE_MASK)) { |
| 661 | /* |
| 662 | * If the retrieve request specifies the memory |
| 663 | * transaction ensure it matches what we expect. |
| 664 | */ |
| 665 | WARN("%s: wrong mem transaction flags %x != %x\n", |
| 666 | __func__, req->flags, obj->desc.flags); |
| 667 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 668 | goto err_unlock_all; |
| 669 | } |
| 670 | |
| 671 | if (req->flags != FFA_MTD_FLAG_TYPE_SHARE_MEMORY && |
| 672 | req->flags != FFA_MTD_FLAG_TYPE_LEND_MEMORY) { |
| 673 | /* |
| 674 | * Current implementation does not support donate and |
| 675 | * it supports no other flags. |
| 676 | */ |
| 677 | WARN("%s: invalid flags 0x%x\n", __func__, req->flags); |
| 678 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 679 | goto err_unlock_all; |
| 680 | } |
| 681 | } |
| 682 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame^] | 683 | /* |
| 684 | * Ensure the emad array lies within the bounds of the descriptor by |
| 685 | * checking the address of the element past the end of the array. |
| 686 | */ |
| 687 | if ((uintptr_t) &req->emad[req->emad_count] > |
| 688 | (uintptr_t)((uint8_t *) &req + total_length)) { |
| 689 | WARN("Invalid emad access.\n"); |
| 690 | return -EINVAL; |
| 691 | } |
| 692 | |
| 693 | /* |
| 694 | * Validate all the endpoints match in the case of multiple |
| 695 | * borrowers. We don't mandate that the order of the borrowers |
| 696 | * must match in the descriptors therefore check to see if the |
| 697 | * endpoints match in any order. |
| 698 | */ |
| 699 | for (size_t i = 0; i < req->emad_count; i++) { |
| 700 | bool found = false; |
| 701 | |
| 702 | for (size_t j = 0; j < obj->desc.emad_count; j++) { |
| 703 | if (req->emad[i].mapd.endpoint_id == |
| 704 | obj->desc.emad[j].mapd.endpoint_id) { |
| 705 | found = true; |
| 706 | break; |
| 707 | } |
| 708 | } |
| 709 | |
| 710 | if (!found) { |
| 711 | WARN("%s: invalid receiver id (0x%x).\n", |
| 712 | __func__, req->emad[i].mapd.endpoint_id); |
| 713 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 714 | goto err_unlock_all; |
| 715 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 716 | } |
| 717 | |
| 718 | mbox->state = MAILBOX_STATE_FULL; |
| 719 | |
| 720 | if (req->emad_count != 0U) { |
| 721 | obj->in_use++; |
| 722 | } |
| 723 | |
| 724 | copy_size = MIN(obj->desc_size, buf_size); |
| 725 | |
| 726 | memcpy(resp, &obj->desc, copy_size); |
| 727 | |
| 728 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 729 | spin_unlock(&mbox->lock); |
| 730 | |
| 731 | SMC_RET8(handle, FFA_MEM_RETRIEVE_RESP, obj->desc_size, |
| 732 | copy_size, 0, 0, 0, 0, 0); |
| 733 | |
| 734 | err_unlock_all: |
| 735 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 736 | err_unlock_mailbox: |
| 737 | spin_unlock(&mbox->lock); |
| 738 | return spmc_ffa_error_return(handle, ret); |
| 739 | } |
| 740 | |
| 741 | /** |
| 742 | * spmc_ffa_mem_frag_rx - FFA_MEM_FRAG_RX implementation. |
| 743 | * @client: Client state. |
| 744 | * @handle_low: Handle passed to &FFA_MEM_RETRIEVE_REQ. Bit[31:0]. |
| 745 | * @handle_high: Handle passed to &FFA_MEM_RETRIEVE_REQ. Bit[63:32]. |
| 746 | * @fragment_offset: Byte offset in descriptor to resume at. |
| 747 | * @sender_id: Bit[31:16]: Endpoint id of sender if client is a |
| 748 | * hypervisor. 0 otherwise. |
| 749 | * @smc_handle: Handle passed to smc call. Used to return |
| 750 | * FFA_MEM_FRAG_TX. |
| 751 | * |
| 752 | * Return: @smc_handle on success, error code on failure. |
| 753 | */ |
| 754 | long spmc_ffa_mem_frag_rx(uint32_t smc_fid, |
| 755 | bool secure_origin, |
| 756 | uint32_t handle_low, |
| 757 | uint32_t handle_high, |
| 758 | uint32_t fragment_offset, |
| 759 | uint32_t sender_id, |
| 760 | void *cookie, |
| 761 | void *handle, |
| 762 | uint64_t flags) |
| 763 | { |
| 764 | int ret; |
| 765 | void *src; |
| 766 | size_t buf_size; |
| 767 | size_t copy_size; |
| 768 | size_t full_copy_size; |
| 769 | uint32_t desc_sender_id; |
| 770 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 771 | uint64_t mem_handle = handle_low | (((uint64_t)handle_high) << 32); |
| 772 | struct spmc_shmem_obj *obj; |
| 773 | |
| 774 | if (!secure_origin) { |
| 775 | WARN("%s: can only be called from swld.\n", |
| 776 | __func__); |
| 777 | return spmc_ffa_error_return(handle, |
| 778 | FFA_ERROR_INVALID_PARAMETER); |
| 779 | } |
| 780 | |
| 781 | spin_lock(&spmc_shmem_obj_state.lock); |
| 782 | |
| 783 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| 784 | if (obj == NULL) { |
| 785 | WARN("%s: invalid handle, 0x%lx, not a valid handle.\n", |
| 786 | __func__, mem_handle); |
| 787 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 788 | goto err_unlock_shmem; |
| 789 | } |
| 790 | |
| 791 | desc_sender_id = (uint32_t)obj->desc.sender_id << 16; |
| 792 | if (sender_id != 0U && sender_id != desc_sender_id) { |
| 793 | WARN("%s: invalid sender_id 0x%x != 0x%x\n", __func__, |
| 794 | sender_id, desc_sender_id); |
| 795 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 796 | goto err_unlock_shmem; |
| 797 | } |
| 798 | |
| 799 | if (fragment_offset >= obj->desc_size) { |
| 800 | WARN("%s: invalid fragment_offset 0x%x >= 0x%zx\n", |
| 801 | __func__, fragment_offset, obj->desc_size); |
| 802 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 803 | goto err_unlock_shmem; |
| 804 | } |
| 805 | |
| 806 | spin_lock(&mbox->lock); |
| 807 | |
| 808 | if (mbox->rxtx_page_count == 0U) { |
| 809 | WARN("%s: buffer pair not registered.\n", __func__); |
| 810 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 811 | goto err_unlock_all; |
| 812 | } |
| 813 | |
| 814 | if (mbox->state != MAILBOX_STATE_EMPTY) { |
| 815 | WARN("%s: RX Buffer is full!\n", __func__); |
| 816 | ret = FFA_ERROR_DENIED; |
| 817 | goto err_unlock_all; |
| 818 | } |
| 819 | |
| 820 | buf_size = mbox->rxtx_page_count * FFA_PAGE_SIZE; |
| 821 | |
| 822 | mbox->state = MAILBOX_STATE_FULL; |
| 823 | |
| 824 | full_copy_size = obj->desc_size - fragment_offset; |
| 825 | copy_size = MIN(full_copy_size, buf_size); |
| 826 | |
| 827 | src = &obj->desc; |
| 828 | |
| 829 | memcpy(mbox->rx_buffer, src + fragment_offset, copy_size); |
| 830 | |
| 831 | spin_unlock(&mbox->lock); |
| 832 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 833 | |
| 834 | SMC_RET8(handle, FFA_MEM_FRAG_TX, handle_low, handle_high, |
| 835 | copy_size, sender_id, 0, 0, 0); |
| 836 | |
| 837 | err_unlock_all: |
| 838 | spin_unlock(&mbox->lock); |
| 839 | err_unlock_shmem: |
| 840 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 841 | return spmc_ffa_error_return(handle, ret); |
| 842 | } |
| 843 | |
| 844 | /** |
| 845 | * spmc_ffa_mem_relinquish - FFA_MEM_RELINQUISH implementation. |
| 846 | * @client: Client state. |
| 847 | * |
| 848 | * Implements a subset of the FF-A FFA_MEM_RELINQUISH call. |
| 849 | * Used by secure os release previously shared memory to non-secure os. |
| 850 | * |
| 851 | * The handle to release must be in the client's (secure os's) transmit buffer. |
| 852 | * |
| 853 | * Return: 0 on success, error code on failure. |
| 854 | */ |
| 855 | int spmc_ffa_mem_relinquish(uint32_t smc_fid, |
| 856 | bool secure_origin, |
| 857 | uint32_t handle_low, |
| 858 | uint32_t handle_high, |
| 859 | uint32_t fragment_offset, |
| 860 | uint32_t sender_id, |
| 861 | void *cookie, |
| 862 | void *handle, |
| 863 | uint64_t flags) |
| 864 | { |
| 865 | int ret; |
| 866 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 867 | struct spmc_shmem_obj *obj; |
| 868 | const struct ffa_mem_relinquish_descriptor *req; |
| 869 | |
| 870 | if (!secure_origin) { |
| 871 | WARN("%s: unsupported relinquish direction.\n", __func__); |
| 872 | return spmc_ffa_error_return(handle, |
| 873 | FFA_ERROR_INVALID_PARAMETER); |
| 874 | } |
| 875 | |
| 876 | spin_lock(&mbox->lock); |
| 877 | |
| 878 | if (mbox->rxtx_page_count == 0U) { |
| 879 | WARN("%s: buffer pair not registered.\n", __func__); |
| 880 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 881 | goto err_unlock_mailbox; |
| 882 | } |
| 883 | |
| 884 | req = mbox->tx_buffer; |
| 885 | |
| 886 | if (req->flags != 0U) { |
| 887 | WARN("%s: unsupported flags 0x%x\n", __func__, req->flags); |
| 888 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 889 | goto err_unlock_mailbox; |
| 890 | } |
| 891 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame^] | 892 | if (req->endpoint_count == 0) { |
| 893 | WARN("%s: endpoint count cannot be 0.\n", __func__); |
| 894 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 895 | goto err_unlock_mailbox; |
| 896 | } |
| 897 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 898 | spin_lock(&spmc_shmem_obj_state.lock); |
| 899 | |
| 900 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, req->handle); |
| 901 | if (obj == NULL) { |
| 902 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 903 | goto err_unlock_all; |
| 904 | } |
| 905 | |
| 906 | if (obj->desc.emad_count != req->endpoint_count) { |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame^] | 907 | WARN("%s: mismatch of endpoint count %u != %u\n", __func__, |
| 908 | obj->desc.emad_count, req->endpoint_count); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 909 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 910 | goto err_unlock_all; |
| 911 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame^] | 912 | |
| 913 | /* Validate requested endpoint IDs match descriptor. */ |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 914 | for (size_t i = 0; i < req->endpoint_count; i++) { |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame^] | 915 | bool found = false; |
| 916 | |
| 917 | for (unsigned int j = 0; j < obj->desc.emad_count; j++) { |
| 918 | if (req->endpoint_array[i] == |
| 919 | obj->desc.emad[j].mapd.endpoint_id) { |
| 920 | found = true; |
| 921 | break; |
| 922 | } |
| 923 | } |
| 924 | |
| 925 | if (!found) { |
| 926 | WARN("%s: Invalid endpoint ID (0x%x).\n", |
| 927 | __func__, req->endpoint_array[i]); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 928 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 929 | goto err_unlock_all; |
| 930 | } |
| 931 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame^] | 932 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 933 | if (obj->in_use == 0U) { |
| 934 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 935 | goto err_unlock_all; |
| 936 | } |
| 937 | obj->in_use--; |
| 938 | |
| 939 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 940 | spin_unlock(&mbox->lock); |
| 941 | |
| 942 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 943 | |
| 944 | err_unlock_all: |
| 945 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 946 | err_unlock_mailbox: |
| 947 | spin_unlock(&mbox->lock); |
| 948 | return spmc_ffa_error_return(handle, ret); |
| 949 | } |
| 950 | |
| 951 | /** |
| 952 | * spmc_ffa_mem_reclaim - FFA_MEM_RECLAIM implementation. |
| 953 | * @client: Client state. |
| 954 | * @handle_low: Unique handle of shared memory object to reclaim. Bit[31:0]. |
| 955 | * @handle_high: Unique handle of shared memory object to reclaim. |
| 956 | * Bit[63:32]. |
| 957 | * @flags: Unsupported, ignored. |
| 958 | * |
| 959 | * Implements a subset of the FF-A FFA_MEM_RECLAIM call. |
| 960 | * Used by non-secure os reclaim memory previously shared with secure os. |
| 961 | * |
| 962 | * Return: 0 on success, error code on failure. |
| 963 | */ |
| 964 | int spmc_ffa_mem_reclaim(uint32_t smc_fid, |
| 965 | bool secure_origin, |
| 966 | uint32_t handle_low, |
| 967 | uint32_t handle_high, |
| 968 | uint32_t mem_flags, |
| 969 | uint64_t x4, |
| 970 | void *cookie, |
| 971 | void *handle, |
| 972 | uint64_t flags) |
| 973 | { |
| 974 | int ret; |
| 975 | struct spmc_shmem_obj *obj; |
| 976 | uint64_t mem_handle = handle_low | (((uint64_t)handle_high) << 32); |
| 977 | |
| 978 | if (secure_origin) { |
| 979 | WARN("%s: unsupported reclaim direction.\n", __func__); |
| 980 | return spmc_ffa_error_return(handle, |
| 981 | FFA_ERROR_INVALID_PARAMETER); |
| 982 | } |
| 983 | |
| 984 | if (mem_flags != 0U) { |
| 985 | WARN("%s: unsupported flags 0x%x\n", __func__, mem_flags); |
| 986 | return spmc_ffa_error_return(handle, |
| 987 | FFA_ERROR_INVALID_PARAMETER); |
| 988 | } |
| 989 | |
| 990 | spin_lock(&spmc_shmem_obj_state.lock); |
| 991 | |
| 992 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| 993 | if (obj == NULL) { |
| 994 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 995 | goto err_unlock; |
| 996 | } |
| 997 | if (obj->in_use != 0U) { |
| 998 | ret = FFA_ERROR_DENIED; |
| 999 | goto err_unlock; |
| 1000 | } |
| 1001 | spmc_shmem_obj_free(&spmc_shmem_obj_state, obj); |
| 1002 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1003 | |
| 1004 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1005 | |
| 1006 | err_unlock: |
| 1007 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1008 | return spmc_ffa_error_return(handle, ret); |
| 1009 | } |