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 | */ |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 6 | #include <assert.h> |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 7 | #include <errno.h> |
| 8 | |
| 9 | #include <common/debug.h> |
| 10 | #include <common/runtime_svc.h> |
| 11 | #include <lib/object_pool.h> |
| 12 | #include <lib/spinlock.h> |
| 13 | #include <lib/xlat_tables/xlat_tables_v2.h> |
| 14 | #include <services/ffa_svc.h> |
| 15 | #include "spmc.h" |
| 16 | #include "spmc_shared_mem.h" |
| 17 | |
| 18 | #include <platform_def.h> |
| 19 | |
| 20 | /** |
| 21 | * struct spmc_shmem_obj - Shared memory object. |
| 22 | * @desc_size: Size of @desc. |
| 23 | * @desc_filled: Size of @desc already received. |
| 24 | * @in_use: Number of clients that have called ffa_mem_retrieve_req |
| 25 | * without a matching ffa_mem_relinquish call. |
| 26 | * @desc: FF-A memory region descriptor passed in ffa_mem_share. |
| 27 | */ |
| 28 | struct spmc_shmem_obj { |
| 29 | size_t desc_size; |
| 30 | size_t desc_filled; |
| 31 | size_t in_use; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 32 | struct ffa_mtd desc; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 33 | }; |
| 34 | |
| 35 | /* |
| 36 | * Declare our data structure to store the metadata of memory share requests. |
| 37 | * The main datastore is allocated on a per platform basis to ensure enough |
| 38 | * storage can be made available. |
| 39 | * The address of the data store will be populated by the SPMC during its |
| 40 | * initialization. |
| 41 | */ |
| 42 | |
| 43 | struct spmc_shmem_obj_state spmc_shmem_obj_state = { |
| 44 | /* Set start value for handle so top 32 bits are needed quickly. */ |
| 45 | .next_handle = 0xffffffc0U, |
| 46 | }; |
| 47 | |
| 48 | /** |
| 49 | * spmc_shmem_obj_size - Convert from descriptor size to object size. |
| 50 | * @desc_size: Size of struct ffa_memory_region_descriptor object. |
| 51 | * |
| 52 | * Return: Size of struct spmc_shmem_obj object. |
| 53 | */ |
| 54 | static size_t spmc_shmem_obj_size(size_t desc_size) |
| 55 | { |
| 56 | return desc_size + offsetof(struct spmc_shmem_obj, desc); |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * spmc_shmem_obj_alloc - Allocate struct spmc_shmem_obj. |
| 61 | * @state: Global state. |
| 62 | * @desc_size: Size of struct ffa_memory_region_descriptor object that |
| 63 | * allocated object will hold. |
| 64 | * |
| 65 | * Return: Pointer to newly allocated object, or %NULL if there not enough space |
| 66 | * left. The returned pointer is only valid while @state is locked, to |
| 67 | * used it again after unlocking @state, spmc_shmem_obj_lookup must be |
| 68 | * called. |
| 69 | */ |
| 70 | static struct spmc_shmem_obj * |
| 71 | spmc_shmem_obj_alloc(struct spmc_shmem_obj_state *state, size_t desc_size) |
| 72 | { |
| 73 | struct spmc_shmem_obj *obj; |
| 74 | size_t free = state->data_size - state->allocated; |
| 75 | |
| 76 | if (state->data == NULL) { |
| 77 | ERROR("Missing shmem datastore!\n"); |
| 78 | return NULL; |
| 79 | } |
| 80 | |
| 81 | if (spmc_shmem_obj_size(desc_size) > free) { |
| 82 | WARN("%s(0x%zx) failed, free 0x%zx\n", |
| 83 | __func__, desc_size, free); |
| 84 | return NULL; |
| 85 | } |
| 86 | obj = (struct spmc_shmem_obj *)(state->data + state->allocated); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 87 | obj->desc = (struct ffa_mtd) {0}; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 88 | obj->desc_size = desc_size; |
| 89 | obj->desc_filled = 0; |
| 90 | obj->in_use = 0; |
| 91 | state->allocated += spmc_shmem_obj_size(desc_size); |
| 92 | return obj; |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * spmc_shmem_obj_free - Free struct spmc_shmem_obj. |
| 97 | * @state: Global state. |
| 98 | * @obj: Object to free. |
| 99 | * |
| 100 | * Release memory used by @obj. Other objects may move, so on return all |
| 101 | * pointers to struct spmc_shmem_obj object should be considered invalid, not |
| 102 | * just @obj. |
| 103 | * |
| 104 | * The current implementation always compacts the remaining objects to simplify |
| 105 | * the allocator and to avoid fragmentation. |
| 106 | */ |
| 107 | |
| 108 | static void spmc_shmem_obj_free(struct spmc_shmem_obj_state *state, |
| 109 | struct spmc_shmem_obj *obj) |
| 110 | { |
| 111 | size_t free_size = spmc_shmem_obj_size(obj->desc_size); |
| 112 | uint8_t *shift_dest = (uint8_t *)obj; |
| 113 | uint8_t *shift_src = shift_dest + free_size; |
| 114 | size_t shift_size = state->allocated - (shift_src - state->data); |
| 115 | |
| 116 | if (shift_size != 0U) { |
| 117 | memmove(shift_dest, shift_src, shift_size); |
| 118 | } |
| 119 | state->allocated -= free_size; |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * spmc_shmem_obj_lookup - Lookup struct spmc_shmem_obj by handle. |
| 124 | * @state: Global state. |
| 125 | * @handle: Unique handle of object to return. |
| 126 | * |
| 127 | * Return: struct spmc_shmem_obj_state object with handle matching @handle. |
| 128 | * %NULL, if not object in @state->data has a matching handle. |
| 129 | */ |
| 130 | static struct spmc_shmem_obj * |
| 131 | spmc_shmem_obj_lookup(struct spmc_shmem_obj_state *state, uint64_t handle) |
| 132 | { |
| 133 | uint8_t *curr = state->data; |
| 134 | |
| 135 | while (curr - state->data < state->allocated) { |
| 136 | struct spmc_shmem_obj *obj = (struct spmc_shmem_obj *)curr; |
| 137 | |
| 138 | if (obj->desc.handle == handle) { |
| 139 | return obj; |
| 140 | } |
| 141 | curr += spmc_shmem_obj_size(obj->desc_size); |
| 142 | } |
| 143 | return NULL; |
| 144 | } |
| 145 | |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 146 | /** |
| 147 | * spmc_shmem_obj_get_next - Get the next memory object from an offset. |
| 148 | * @offset: Offset used to track which objects have previously been |
| 149 | * returned. |
| 150 | * |
| 151 | * Return: the next struct spmc_shmem_obj_state object from the provided |
| 152 | * offset. |
| 153 | * %NULL, if there are no more objects. |
| 154 | */ |
| 155 | static struct spmc_shmem_obj * |
| 156 | spmc_shmem_obj_get_next(struct spmc_shmem_obj_state *state, size_t *offset) |
| 157 | { |
| 158 | uint8_t *curr = state->data + *offset; |
| 159 | |
| 160 | if (curr - state->data < state->allocated) { |
| 161 | struct spmc_shmem_obj *obj = (struct spmc_shmem_obj *)curr; |
| 162 | |
| 163 | *offset += spmc_shmem_obj_size(obj->desc_size); |
| 164 | |
| 165 | return obj; |
| 166 | } |
| 167 | return NULL; |
| 168 | } |
| 169 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 170 | /******************************************************************************* |
| 171 | * FF-A memory descriptor helper functions. |
| 172 | ******************************************************************************/ |
| 173 | /** |
| 174 | * spmc_shmem_obj_get_emad - Get the emad from a given index depending on the |
| 175 | * clients FF-A version. |
| 176 | * @desc: The memory transaction descriptor. |
| 177 | * @index: The index of the emad element to be accessed. |
| 178 | * @ffa_version: FF-A version of the provided structure. |
| 179 | * @emad_size: Will be populated with the size of the returned emad |
| 180 | * descriptor. |
| 181 | * Return: A pointer to the requested emad structure. |
| 182 | */ |
| 183 | static void * |
| 184 | spmc_shmem_obj_get_emad(const struct ffa_mtd *desc, uint32_t index, |
| 185 | uint32_t ffa_version, size_t *emad_size) |
| 186 | { |
| 187 | uint8_t *emad; |
| 188 | /* |
| 189 | * If the caller is using FF-A v1.0 interpret the descriptor as a v1.0 |
| 190 | * format, otherwise assume it is a v1.1 format. |
| 191 | */ |
| 192 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 193 | /* Cast our descriptor to the v1.0 format. */ |
| 194 | struct ffa_mtd_v1_0 *mtd_v1_0 = |
| 195 | (struct ffa_mtd_v1_0 *) desc; |
| 196 | emad = (uint8_t *) &(mtd_v1_0->emad); |
| 197 | *emad_size = sizeof(struct ffa_emad_v1_0); |
| 198 | } else { |
| 199 | if (!is_aligned(desc->emad_offset, 16)) { |
| 200 | WARN("Emad offset is not aligned.\n"); |
| 201 | return NULL; |
| 202 | } |
| 203 | emad = ((uint8_t *) desc + desc->emad_offset); |
| 204 | *emad_size = desc->emad_size; |
| 205 | } |
| 206 | return (emad + (*emad_size * index)); |
| 207 | } |
| 208 | |
| 209 | /** |
| 210 | * spmc_shmem_obj_get_comp_mrd - Get comp_mrd from a mtd struct based on the |
| 211 | * FF-A version of the descriptor. |
| 212 | * @obj: Object containing ffa_memory_region_descriptor. |
| 213 | * |
| 214 | * Return: struct ffa_comp_mrd object corresponding to the composite memory |
| 215 | * region descriptor. |
| 216 | */ |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 217 | static struct ffa_comp_mrd * |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 218 | spmc_shmem_obj_get_comp_mrd(struct spmc_shmem_obj *obj, uint32_t ffa_version) |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 219 | { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 220 | size_t emad_size; |
| 221 | /* |
| 222 | * The comp_mrd_offset field of the emad descriptor remains consistent |
| 223 | * between FF-A versions therefore we can use the v1.0 descriptor here |
| 224 | * in all cases. |
| 225 | */ |
| 226 | struct ffa_emad_v1_0 *emad = spmc_shmem_obj_get_emad(&obj->desc, 0, |
| 227 | ffa_version, |
| 228 | &emad_size); |
| 229 | /* Ensure the emad array was found. */ |
| 230 | if (emad == NULL) { |
| 231 | return NULL; |
| 232 | } |
| 233 | |
| 234 | /* Ensure the composite descriptor offset is aligned. */ |
| 235 | if (!is_aligned(emad->comp_mrd_offset, 8)) { |
| 236 | WARN("Unaligned composite memory region descriptor offset.\n"); |
| 237 | return NULL; |
| 238 | } |
| 239 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 240 | return (struct ffa_comp_mrd *) |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 241 | ((uint8_t *)(&obj->desc) + emad->comp_mrd_offset); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | /** |
| 245 | * spmc_shmem_obj_ffa_constituent_size - Calculate variable size part of obj. |
| 246 | * @obj: Object containing ffa_memory_region_descriptor. |
| 247 | * |
| 248 | * Return: Size of ffa_constituent_memory_region_descriptors in @obj. |
| 249 | */ |
| 250 | static size_t |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 251 | spmc_shmem_obj_ffa_constituent_size(struct spmc_shmem_obj *obj, |
| 252 | uint32_t ffa_version) |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 253 | { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 254 | struct ffa_comp_mrd *comp_mrd; |
| 255 | |
| 256 | comp_mrd = spmc_shmem_obj_get_comp_mrd(obj, ffa_version); |
| 257 | if (comp_mrd == NULL) { |
| 258 | return 0; |
| 259 | } |
| 260 | return comp_mrd->address_range_count * sizeof(struct ffa_cons_mrd); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 261 | } |
| 262 | |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 263 | /** |
| 264 | * spmc_shmem_obj_validate_id - Validate a partition ID is participating in |
| 265 | * a given memory transaction. |
| 266 | * @sp_id: Partition ID to validate. |
| 267 | * @desc: Descriptor of the memory transaction. |
| 268 | * |
| 269 | * Return: true if ID is valid, else false. |
| 270 | */ |
| 271 | bool spmc_shmem_obj_validate_id(const struct ffa_mtd *desc, uint16_t sp_id) |
| 272 | { |
| 273 | bool found = false; |
| 274 | |
| 275 | /* Validate the partition is a valid participant. */ |
| 276 | for (unsigned int i = 0U; i < desc->emad_count; i++) { |
| 277 | size_t emad_size; |
| 278 | struct ffa_emad_v1_0 *emad; |
| 279 | |
| 280 | emad = spmc_shmem_obj_get_emad(desc, i, |
| 281 | MAKE_FFA_VERSION(1, 1), |
| 282 | &emad_size); |
| 283 | if (sp_id == emad->mapd.endpoint_id) { |
| 284 | found = true; |
| 285 | break; |
| 286 | } |
| 287 | } |
| 288 | return found; |
| 289 | } |
| 290 | |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 291 | /* |
| 292 | * Compare two memory regions to determine if any range overlaps with another |
| 293 | * ongoing memory transaction. |
| 294 | */ |
| 295 | static bool |
| 296 | overlapping_memory_regions(struct ffa_comp_mrd *region1, |
| 297 | struct ffa_comp_mrd *region2) |
| 298 | { |
| 299 | uint64_t region1_start; |
| 300 | uint64_t region1_size; |
| 301 | uint64_t region1_end; |
| 302 | uint64_t region2_start; |
| 303 | uint64_t region2_size; |
| 304 | uint64_t region2_end; |
| 305 | |
| 306 | assert(region1 != NULL); |
| 307 | assert(region2 != NULL); |
| 308 | |
| 309 | if (region1 == region2) { |
| 310 | return true; |
| 311 | } |
| 312 | |
| 313 | /* |
| 314 | * Check each memory region in the request against existing |
| 315 | * transactions. |
| 316 | */ |
| 317 | for (size_t i = 0; i < region1->address_range_count; i++) { |
| 318 | |
| 319 | region1_start = region1->address_range_array[i].address; |
| 320 | region1_size = |
| 321 | region1->address_range_array[i].page_count * |
| 322 | PAGE_SIZE_4KB; |
| 323 | region1_end = region1_start + region1_size; |
| 324 | |
| 325 | for (size_t j = 0; j < region2->address_range_count; j++) { |
| 326 | |
| 327 | region2_start = region2->address_range_array[j].address; |
| 328 | region2_size = |
| 329 | region2->address_range_array[j].page_count * |
| 330 | PAGE_SIZE_4KB; |
| 331 | region2_end = region2_start + region2_size; |
| 332 | |
| 333 | if ((region1_start >= region2_start && |
| 334 | region1_start < region2_end) || |
Marc Bonnici | e062337 | 2022-05-20 14:34:56 +0100 | [diff] [blame] | 335 | (region1_end > region2_start |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 336 | && region1_end < region2_end)) { |
| 337 | WARN("Overlapping mem regions 0x%lx-0x%lx & 0x%lx-0x%lx\n", |
| 338 | region1_start, region1_end, |
| 339 | region2_start, region2_end); |
| 340 | return true; |
| 341 | } |
| 342 | } |
| 343 | } |
| 344 | return false; |
| 345 | } |
| 346 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 347 | /******************************************************************************* |
| 348 | * FF-A v1.0 Memory Descriptor Conversion Helpers. |
| 349 | ******************************************************************************/ |
| 350 | /** |
| 351 | * spmc_shm_get_v1_1_descriptor_size - Calculate the required size for a v1.1 |
| 352 | * converted descriptor. |
| 353 | * @orig: The original v1.0 memory transaction descriptor. |
| 354 | * @desc_size: The size of the original v1.0 memory transaction descriptor. |
| 355 | * |
| 356 | * Return: the size required to store the descriptor store in the v1.1 format. |
| 357 | */ |
| 358 | static size_t |
| 359 | spmc_shm_get_v1_1_descriptor_size(struct ffa_mtd_v1_0 *orig, size_t desc_size) |
| 360 | { |
| 361 | size_t size = 0; |
| 362 | struct ffa_comp_mrd *mrd; |
| 363 | struct ffa_emad_v1_0 *emad_array = orig->emad; |
| 364 | |
| 365 | /* Get the size of the v1.1 descriptor. */ |
| 366 | size += sizeof(struct ffa_mtd); |
| 367 | |
| 368 | /* Add the size of the emad descriptors. */ |
| 369 | size += orig->emad_count * sizeof(struct ffa_emad_v1_0); |
| 370 | |
| 371 | /* Add the size of the composite mrds. */ |
| 372 | size += sizeof(struct ffa_comp_mrd); |
| 373 | |
| 374 | /* Add the size of the constituent mrds. */ |
| 375 | mrd = (struct ffa_comp_mrd *) ((uint8_t *) orig + |
| 376 | emad_array[0].comp_mrd_offset); |
| 377 | |
| 378 | /* Check the calculated address is within the memory descriptor. */ |
| 379 | if ((uintptr_t) mrd >= (uintptr_t)((uint8_t *) orig + desc_size)) { |
| 380 | return 0; |
| 381 | } |
| 382 | size += mrd->address_range_count * sizeof(struct ffa_cons_mrd); |
| 383 | |
| 384 | return size; |
| 385 | } |
| 386 | |
| 387 | /** |
| 388 | * spmc_shm_get_v1_0_descriptor_size - Calculate the required size for a v1.0 |
| 389 | * converted descriptor. |
| 390 | * @orig: The original v1.1 memory transaction descriptor. |
| 391 | * @desc_size: The size of the original v1.1 memory transaction descriptor. |
| 392 | * |
| 393 | * Return: the size required to store the descriptor store in the v1.0 format. |
| 394 | */ |
| 395 | static size_t |
| 396 | spmc_shm_get_v1_0_descriptor_size(struct ffa_mtd *orig, size_t desc_size) |
| 397 | { |
| 398 | size_t size = 0; |
| 399 | struct ffa_comp_mrd *mrd; |
| 400 | struct ffa_emad_v1_0 *emad_array = (struct ffa_emad_v1_0 *) |
| 401 | ((uint8_t *) orig + |
| 402 | orig->emad_offset); |
| 403 | |
| 404 | /* Get the size of the v1.0 descriptor. */ |
| 405 | size += sizeof(struct ffa_mtd_v1_0); |
| 406 | |
| 407 | /* Add the size of the v1.0 emad descriptors. */ |
| 408 | size += orig->emad_count * sizeof(struct ffa_emad_v1_0); |
| 409 | |
| 410 | /* Add the size of the composite mrds. */ |
| 411 | size += sizeof(struct ffa_comp_mrd); |
| 412 | |
| 413 | /* Add the size of the constituent mrds. */ |
| 414 | mrd = (struct ffa_comp_mrd *) ((uint8_t *) orig + |
| 415 | emad_array[0].comp_mrd_offset); |
| 416 | |
| 417 | /* Check the calculated address is within the memory descriptor. */ |
| 418 | if ((uintptr_t) mrd >= (uintptr_t)((uint8_t *) orig + desc_size)) { |
| 419 | return 0; |
| 420 | } |
| 421 | size += mrd->address_range_count * sizeof(struct ffa_cons_mrd); |
| 422 | |
| 423 | return size; |
| 424 | } |
| 425 | |
| 426 | /** |
| 427 | * spmc_shm_convert_shmem_obj_from_v1_0 - Converts a given v1.0 memory object. |
| 428 | * @out_obj: The shared memory object to populate the converted descriptor. |
| 429 | * @orig: The shared memory object containing the v1.0 descriptor. |
| 430 | * |
| 431 | * Return: true if the conversion is successful else false. |
| 432 | */ |
| 433 | static bool |
| 434 | spmc_shm_convert_shmem_obj_from_v1_0(struct spmc_shmem_obj *out_obj, |
| 435 | struct spmc_shmem_obj *orig) |
| 436 | { |
| 437 | struct ffa_mtd_v1_0 *mtd_orig = (struct ffa_mtd_v1_0 *) &orig->desc; |
| 438 | struct ffa_mtd *out = &out_obj->desc; |
| 439 | struct ffa_emad_v1_0 *emad_array_in; |
| 440 | struct ffa_emad_v1_0 *emad_array_out; |
| 441 | struct ffa_comp_mrd *mrd_in; |
| 442 | struct ffa_comp_mrd *mrd_out; |
| 443 | |
| 444 | size_t mrd_in_offset; |
| 445 | size_t mrd_out_offset; |
| 446 | size_t mrd_size = 0; |
| 447 | |
| 448 | /* Populate the new descriptor format from the v1.0 struct. */ |
| 449 | out->sender_id = mtd_orig->sender_id; |
| 450 | out->memory_region_attributes = mtd_orig->memory_region_attributes; |
| 451 | out->flags = mtd_orig->flags; |
| 452 | out->handle = mtd_orig->handle; |
| 453 | out->tag = mtd_orig->tag; |
| 454 | out->emad_count = mtd_orig->emad_count; |
| 455 | out->emad_size = sizeof(struct ffa_emad_v1_0); |
| 456 | |
| 457 | /* |
| 458 | * We will locate the emad descriptors directly after the ffa_mtd |
| 459 | * struct. This will be 8-byte aligned. |
| 460 | */ |
| 461 | out->emad_offset = sizeof(struct ffa_mtd); |
| 462 | |
| 463 | emad_array_in = mtd_orig->emad; |
| 464 | emad_array_out = (struct ffa_emad_v1_0 *) |
| 465 | ((uint8_t *) out + out->emad_offset); |
| 466 | |
| 467 | /* Copy across the emad structs. */ |
| 468 | for (unsigned int i = 0U; i < out->emad_count; i++) { |
| 469 | memcpy(&emad_array_out[i], &emad_array_in[i], |
| 470 | sizeof(struct ffa_emad_v1_0)); |
| 471 | } |
| 472 | |
| 473 | /* Place the mrd descriptors after the end of the emad descriptors.*/ |
| 474 | mrd_in_offset = emad_array_in->comp_mrd_offset; |
| 475 | mrd_out_offset = out->emad_offset + (out->emad_size * out->emad_count); |
| 476 | mrd_out = (struct ffa_comp_mrd *) ((uint8_t *) out + mrd_out_offset); |
| 477 | |
| 478 | /* Add the size of the composite memory region descriptor. */ |
| 479 | mrd_size += sizeof(struct ffa_comp_mrd); |
| 480 | |
| 481 | /* Find the mrd descriptor. */ |
| 482 | mrd_in = (struct ffa_comp_mrd *) ((uint8_t *) mtd_orig + mrd_in_offset); |
| 483 | |
| 484 | /* Add the size of the constituent memory region descriptors. */ |
| 485 | mrd_size += mrd_in->address_range_count * sizeof(struct ffa_cons_mrd); |
| 486 | |
| 487 | /* |
| 488 | * Update the offset in the emads by the delta between the input and |
| 489 | * output addresses. |
| 490 | */ |
| 491 | for (unsigned int i = 0U; i < out->emad_count; i++) { |
| 492 | emad_array_out[i].comp_mrd_offset = |
| 493 | emad_array_in[i].comp_mrd_offset + |
| 494 | (mrd_out_offset - mrd_in_offset); |
| 495 | } |
| 496 | |
| 497 | /* Verify that we stay within bound of the memory descriptors. */ |
| 498 | if ((uintptr_t)((uint8_t *) mrd_in + mrd_size) > |
| 499 | (uintptr_t)((uint8_t *) mtd_orig + orig->desc_size) || |
| 500 | ((uintptr_t)((uint8_t *) mrd_out + mrd_size) > |
| 501 | (uintptr_t)((uint8_t *) out + out_obj->desc_size))) { |
| 502 | ERROR("%s: Invalid mrd structure.\n", __func__); |
| 503 | return false; |
| 504 | } |
| 505 | |
| 506 | /* Copy the mrd descriptors directly. */ |
| 507 | memcpy(mrd_out, mrd_in, mrd_size); |
| 508 | |
| 509 | return true; |
| 510 | } |
| 511 | |
| 512 | /** |
| 513 | * spmc_shm_convert_mtd_to_v1_0 - Converts a given v1.1 memory object to |
| 514 | * v1.0 memory object. |
| 515 | * @out_obj: The shared memory object to populate the v1.0 descriptor. |
| 516 | * @orig: The shared memory object containing the v1.1 descriptor. |
| 517 | * |
| 518 | * Return: true if the conversion is successful else false. |
| 519 | */ |
| 520 | static bool |
| 521 | spmc_shm_convert_mtd_to_v1_0(struct spmc_shmem_obj *out_obj, |
| 522 | struct spmc_shmem_obj *orig) |
| 523 | { |
| 524 | struct ffa_mtd *mtd_orig = &orig->desc; |
| 525 | struct ffa_mtd_v1_0 *out = (struct ffa_mtd_v1_0 *) &out_obj->desc; |
| 526 | struct ffa_emad_v1_0 *emad_in; |
| 527 | struct ffa_emad_v1_0 *emad_array_in; |
| 528 | struct ffa_emad_v1_0 *emad_array_out; |
| 529 | struct ffa_comp_mrd *mrd_in; |
| 530 | struct ffa_comp_mrd *mrd_out; |
| 531 | |
| 532 | size_t mrd_in_offset; |
| 533 | size_t mrd_out_offset; |
| 534 | size_t emad_out_array_size; |
| 535 | size_t mrd_size = 0; |
| 536 | |
| 537 | /* Populate the v1.0 descriptor format from the v1.1 struct. */ |
| 538 | out->sender_id = mtd_orig->sender_id; |
| 539 | out->memory_region_attributes = mtd_orig->memory_region_attributes; |
| 540 | out->flags = mtd_orig->flags; |
| 541 | out->handle = mtd_orig->handle; |
| 542 | out->tag = mtd_orig->tag; |
| 543 | out->emad_count = mtd_orig->emad_count; |
| 544 | |
| 545 | /* Determine the location of the emad array in both descriptors. */ |
| 546 | emad_array_in = (struct ffa_emad_v1_0 *) |
| 547 | ((uint8_t *) mtd_orig + mtd_orig->emad_offset); |
| 548 | emad_array_out = out->emad; |
| 549 | |
| 550 | /* Copy across the emad structs. */ |
| 551 | emad_in = emad_array_in; |
| 552 | for (unsigned int i = 0U; i < out->emad_count; i++) { |
| 553 | memcpy(&emad_array_out[i], emad_in, |
| 554 | sizeof(struct ffa_emad_v1_0)); |
| 555 | |
| 556 | emad_in += mtd_orig->emad_size; |
| 557 | } |
| 558 | |
| 559 | /* Place the mrd descriptors after the end of the emad descriptors. */ |
| 560 | emad_out_array_size = sizeof(struct ffa_emad_v1_0) * out->emad_count; |
| 561 | |
| 562 | mrd_out_offset = (uint8_t *) out->emad - (uint8_t *) out + |
| 563 | emad_out_array_size; |
| 564 | |
| 565 | mrd_out = (struct ffa_comp_mrd *) ((uint8_t *) out + mrd_out_offset); |
| 566 | |
| 567 | mrd_in_offset = mtd_orig->emad_offset + |
| 568 | (mtd_orig->emad_size * mtd_orig->emad_count); |
| 569 | |
| 570 | /* Add the size of the composite memory region descriptor. */ |
| 571 | mrd_size += sizeof(struct ffa_comp_mrd); |
| 572 | |
| 573 | /* Find the mrd descriptor. */ |
| 574 | mrd_in = (struct ffa_comp_mrd *) ((uint8_t *) mtd_orig + mrd_in_offset); |
| 575 | |
| 576 | /* Add the size of the constituent memory region descriptors. */ |
| 577 | mrd_size += mrd_in->address_range_count * sizeof(struct ffa_cons_mrd); |
| 578 | |
| 579 | /* |
| 580 | * Update the offset in the emads by the delta between the input and |
| 581 | * output addresses. |
| 582 | */ |
| 583 | emad_in = emad_array_in; |
| 584 | |
| 585 | for (unsigned int i = 0U; i < out->emad_count; i++) { |
| 586 | emad_array_out[i].comp_mrd_offset = emad_in->comp_mrd_offset + |
| 587 | (mrd_out_offset - |
| 588 | mrd_in_offset); |
| 589 | emad_in += mtd_orig->emad_size; |
| 590 | } |
| 591 | |
| 592 | /* Verify that we stay within bound of the memory descriptors. */ |
| 593 | if ((uintptr_t)((uint8_t *) mrd_in + mrd_size) > |
| 594 | (uintptr_t)((uint8_t *) mtd_orig + orig->desc_size) || |
| 595 | ((uintptr_t)((uint8_t *) mrd_out + mrd_size) > |
| 596 | (uintptr_t)((uint8_t *) out + out_obj->desc_size))) { |
| 597 | ERROR("%s: Invalid mrd structure.\n", __func__); |
| 598 | return false; |
| 599 | } |
| 600 | |
| 601 | /* Copy the mrd descriptors directly. */ |
| 602 | memcpy(mrd_out, mrd_in, mrd_size); |
| 603 | |
| 604 | return true; |
| 605 | } |
| 606 | |
| 607 | /** |
| 608 | * spmc_populate_ffa_v1_0_descriptor - Converts a given v1.1 memory object to |
| 609 | * the v1.0 format and populates the |
| 610 | * provided buffer. |
| 611 | * @dst: Buffer to populate v1.0 ffa_memory_region_descriptor. |
| 612 | * @orig_obj: Object containing v1.1 ffa_memory_region_descriptor. |
| 613 | * @buf_size: Size of the buffer to populate. |
| 614 | * @offset: The offset of the converted descriptor to copy. |
| 615 | * @copy_size: Will be populated with the number of bytes copied. |
| 616 | * @out_desc_size: Will be populated with the total size of the v1.0 |
| 617 | * descriptor. |
| 618 | * |
| 619 | * Return: 0 if conversion and population succeeded. |
| 620 | * Note: This function invalidates the reference to @orig therefore |
| 621 | * `spmc_shmem_obj_lookup` must be called if further usage is required. |
| 622 | */ |
| 623 | static uint32_t |
| 624 | spmc_populate_ffa_v1_0_descriptor(void *dst, struct spmc_shmem_obj *orig_obj, |
| 625 | size_t buf_size, size_t offset, |
| 626 | size_t *copy_size, size_t *v1_0_desc_size) |
| 627 | { |
| 628 | struct spmc_shmem_obj *v1_0_obj; |
| 629 | |
| 630 | /* Calculate the size that the v1.0 descriptor will require. */ |
| 631 | *v1_0_desc_size = spmc_shm_get_v1_0_descriptor_size( |
| 632 | &orig_obj->desc, orig_obj->desc_size); |
| 633 | |
| 634 | if (*v1_0_desc_size == 0) { |
| 635 | ERROR("%s: cannot determine size of descriptor.\n", |
| 636 | __func__); |
| 637 | return FFA_ERROR_INVALID_PARAMETER; |
| 638 | } |
| 639 | |
| 640 | /* Get a new obj to store the v1.0 descriptor. */ |
| 641 | v1_0_obj = spmc_shmem_obj_alloc(&spmc_shmem_obj_state, |
| 642 | *v1_0_desc_size); |
| 643 | |
| 644 | if (!v1_0_obj) { |
| 645 | return FFA_ERROR_NO_MEMORY; |
| 646 | } |
| 647 | |
| 648 | /* Perform the conversion from v1.1 to v1.0. */ |
| 649 | if (!spmc_shm_convert_mtd_to_v1_0(v1_0_obj, orig_obj)) { |
| 650 | spmc_shmem_obj_free(&spmc_shmem_obj_state, v1_0_obj); |
| 651 | return FFA_ERROR_INVALID_PARAMETER; |
| 652 | } |
| 653 | |
| 654 | *copy_size = MIN(v1_0_obj->desc_size - offset, buf_size); |
| 655 | memcpy(dst, (uint8_t *) &v1_0_obj->desc + offset, *copy_size); |
| 656 | |
| 657 | /* |
| 658 | * We're finished with the v1.0 descriptor for now so free it. |
| 659 | * Note that this will invalidate any references to the v1.1 |
| 660 | * descriptor. |
| 661 | */ |
| 662 | spmc_shmem_obj_free(&spmc_shmem_obj_state, v1_0_obj); |
| 663 | |
| 664 | return 0; |
| 665 | } |
| 666 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 667 | /** |
| 668 | * spmc_shmem_check_obj - Check that counts in descriptor match overall size. |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 669 | * @obj: Object containing ffa_memory_region_descriptor. |
| 670 | * @ffa_version: FF-A version of the provided descriptor. |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 671 | * |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 672 | * Return: 0 if object is valid, -EINVAL if constituent_memory_region_descriptor |
| 673 | * offset or count is invalid. |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 674 | */ |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 675 | static int spmc_shmem_check_obj(struct spmc_shmem_obj *obj, |
| 676 | uint32_t ffa_version) |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 677 | { |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 678 | uint32_t comp_mrd_offset = 0; |
| 679 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 680 | if (obj->desc.emad_count == 0U) { |
| 681 | WARN("%s: unsupported attribute desc count %u.\n", |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 682 | __func__, obj->desc.emad_count); |
| 683 | return -EINVAL; |
| 684 | } |
| 685 | |
| 686 | for (size_t emad_num = 0; emad_num < obj->desc.emad_count; emad_num++) { |
| 687 | size_t size; |
| 688 | size_t count; |
| 689 | size_t expected_size; |
| 690 | size_t total_page_count; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 691 | size_t emad_size; |
| 692 | size_t desc_size; |
| 693 | size_t header_emad_size; |
| 694 | uint32_t offset; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 695 | struct ffa_comp_mrd *comp; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 696 | struct ffa_emad_v1_0 *emad; |
| 697 | |
| 698 | emad = spmc_shmem_obj_get_emad(&obj->desc, emad_num, |
| 699 | ffa_version, &emad_size); |
| 700 | if (emad == NULL) { |
| 701 | WARN("%s: invalid emad structure.\n", __func__); |
| 702 | return -EINVAL; |
| 703 | } |
| 704 | |
| 705 | /* |
| 706 | * Validate the calculated emad address resides within the |
| 707 | * descriptor. |
| 708 | */ |
| 709 | if ((uintptr_t) emad >= |
| 710 | (uintptr_t)((uint8_t *) &obj->desc + obj->desc_size)) { |
| 711 | WARN("Invalid emad access.\n"); |
| 712 | return -EINVAL; |
| 713 | } |
| 714 | |
| 715 | offset = emad->comp_mrd_offset; |
| 716 | |
| 717 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 718 | desc_size = sizeof(struct ffa_mtd_v1_0); |
| 719 | } else { |
| 720 | desc_size = sizeof(struct ffa_mtd); |
| 721 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 722 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 723 | header_emad_size = desc_size + |
| 724 | (obj->desc.emad_count * emad_size); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 725 | |
| 726 | if (offset < header_emad_size) { |
| 727 | WARN("%s: invalid object, offset %u < header + emad %zu\n", |
| 728 | __func__, offset, header_emad_size); |
| 729 | return -EINVAL; |
| 730 | } |
| 731 | |
| 732 | size = obj->desc_size; |
| 733 | |
| 734 | if (offset > size) { |
| 735 | WARN("%s: invalid object, offset %u > total size %zu\n", |
| 736 | __func__, offset, obj->desc_size); |
| 737 | return -EINVAL; |
| 738 | } |
| 739 | size -= offset; |
| 740 | |
| 741 | if (size < sizeof(struct ffa_comp_mrd)) { |
| 742 | WARN("%s: invalid object, offset %u, total size %zu, no header space.\n", |
| 743 | __func__, offset, obj->desc_size); |
| 744 | return -EINVAL; |
| 745 | } |
| 746 | size -= sizeof(struct ffa_comp_mrd); |
| 747 | |
| 748 | count = size / sizeof(struct ffa_cons_mrd); |
| 749 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 750 | comp = spmc_shmem_obj_get_comp_mrd(obj, ffa_version); |
| 751 | |
| 752 | if (comp == NULL) { |
| 753 | WARN("%s: invalid comp_mrd offset\n", __func__); |
| 754 | return -EINVAL; |
| 755 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 756 | |
| 757 | if (comp->address_range_count != count) { |
| 758 | WARN("%s: invalid object, desc count %u != %zu\n", |
| 759 | __func__, comp->address_range_count, count); |
| 760 | return -EINVAL; |
| 761 | } |
| 762 | |
| 763 | expected_size = offset + sizeof(*comp) + |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 764 | spmc_shmem_obj_ffa_constituent_size(obj, |
| 765 | ffa_version); |
| 766 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 767 | if (expected_size != obj->desc_size) { |
| 768 | WARN("%s: invalid object, computed size %zu != size %zu\n", |
| 769 | __func__, expected_size, obj->desc_size); |
| 770 | return -EINVAL; |
| 771 | } |
| 772 | |
| 773 | if (obj->desc_filled < obj->desc_size) { |
| 774 | /* |
| 775 | * The whole descriptor has not yet been received. |
| 776 | * Skip final checks. |
| 777 | */ |
| 778 | return 0; |
| 779 | } |
| 780 | |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 781 | /* |
| 782 | * The offset provided to the composite memory region descriptor |
| 783 | * should be consistent across endpoint descriptors. Store the |
| 784 | * first entry and compare against subsequent entries. |
| 785 | */ |
| 786 | if (comp_mrd_offset == 0) { |
| 787 | comp_mrd_offset = offset; |
| 788 | } else { |
| 789 | if (comp_mrd_offset != offset) { |
| 790 | ERROR("%s: mismatching offsets provided, %u != %u\n", |
| 791 | __func__, offset, comp_mrd_offset); |
| 792 | return -EINVAL; |
| 793 | } |
| 794 | } |
| 795 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 796 | total_page_count = 0; |
| 797 | |
| 798 | for (size_t i = 0; i < count; i++) { |
| 799 | total_page_count += |
| 800 | comp->address_range_array[i].page_count; |
| 801 | } |
| 802 | if (comp->total_page_count != total_page_count) { |
| 803 | WARN("%s: invalid object, desc total_page_count %u != %zu\n", |
| 804 | __func__, comp->total_page_count, |
| 805 | total_page_count); |
| 806 | return -EINVAL; |
| 807 | } |
| 808 | } |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 809 | return 0; |
| 810 | } |
| 811 | |
| 812 | /** |
| 813 | * spmc_shmem_check_state_obj - Check if the descriptor describes memory |
| 814 | * regions that are currently involved with an |
| 815 | * existing memory transactions. This implies that |
| 816 | * the memory is not in a valid state for lending. |
| 817 | * @obj: Object containing ffa_memory_region_descriptor. |
| 818 | * |
| 819 | * Return: 0 if object is valid, -EINVAL if invalid memory state. |
| 820 | */ |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 821 | static int spmc_shmem_check_state_obj(struct spmc_shmem_obj *obj, |
| 822 | uint32_t ffa_version) |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 823 | { |
| 824 | size_t obj_offset = 0; |
| 825 | struct spmc_shmem_obj *inflight_obj; |
| 826 | |
| 827 | struct ffa_comp_mrd *other_mrd; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 828 | struct ffa_comp_mrd *requested_mrd = spmc_shmem_obj_get_comp_mrd(obj, |
| 829 | ffa_version); |
| 830 | |
| 831 | if (requested_mrd == NULL) { |
| 832 | return -EINVAL; |
| 833 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 834 | |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 835 | inflight_obj = spmc_shmem_obj_get_next(&spmc_shmem_obj_state, |
| 836 | &obj_offset); |
| 837 | |
| 838 | while (inflight_obj != NULL) { |
| 839 | /* |
| 840 | * Don't compare the transaction to itself or to partially |
| 841 | * transmitted descriptors. |
| 842 | */ |
| 843 | if ((obj->desc.handle != inflight_obj->desc.handle) && |
| 844 | (obj->desc_size == obj->desc_filled)) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 845 | other_mrd = spmc_shmem_obj_get_comp_mrd(inflight_obj, |
Marc Bonnici | 344ca9d | 2022-05-20 14:38:55 +0100 | [diff] [blame] | 846 | FFA_VERSION_COMPILED); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 847 | if (other_mrd == NULL) { |
| 848 | return -EINVAL; |
| 849 | } |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 850 | if (overlapping_memory_regions(requested_mrd, |
| 851 | other_mrd)) { |
| 852 | return -EINVAL; |
| 853 | } |
| 854 | } |
| 855 | |
| 856 | inflight_obj = spmc_shmem_obj_get_next(&spmc_shmem_obj_state, |
| 857 | &obj_offset); |
| 858 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 859 | return 0; |
| 860 | } |
| 861 | |
| 862 | static long spmc_ffa_fill_desc(struct mailbox *mbox, |
| 863 | struct spmc_shmem_obj *obj, |
| 864 | uint32_t fragment_length, |
| 865 | ffa_mtd_flag32_t mtd_flag, |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 866 | uint32_t ffa_version, |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 867 | void *smc_handle) |
| 868 | { |
| 869 | int ret; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 870 | size_t emad_size; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 871 | uint32_t handle_low; |
| 872 | uint32_t handle_high; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 873 | struct ffa_emad_v1_0 *emad; |
| 874 | struct ffa_emad_v1_0 *other_emad; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 875 | |
| 876 | if (mbox->rxtx_page_count == 0U) { |
| 877 | WARN("%s: buffer pair not registered.\n", __func__); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 878 | ret = FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 879 | goto err_arg; |
| 880 | } |
| 881 | |
| 882 | if (fragment_length > mbox->rxtx_page_count * PAGE_SIZE_4KB) { |
| 883 | WARN("%s: bad fragment size %u > %u buffer size\n", __func__, |
| 884 | fragment_length, mbox->rxtx_page_count * PAGE_SIZE_4KB); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 885 | ret = FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 886 | goto err_arg; |
| 887 | } |
| 888 | |
| 889 | memcpy((uint8_t *)&obj->desc + obj->desc_filled, |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 890 | (uint8_t *) mbox->tx_buffer, fragment_length); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 891 | |
| 892 | if (fragment_length > obj->desc_size - obj->desc_filled) { |
| 893 | WARN("%s: bad fragment size %u > %zu remaining\n", __func__, |
| 894 | fragment_length, obj->desc_size - obj->desc_filled); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 895 | ret = FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 896 | goto err_arg; |
| 897 | } |
| 898 | |
| 899 | /* Ensure that the sender ID resides in the normal world. */ |
| 900 | if (ffa_is_secure_world_id(obj->desc.sender_id)) { |
| 901 | WARN("%s: Invalid sender ID 0x%x.\n", |
| 902 | __func__, obj->desc.sender_id); |
| 903 | ret = FFA_ERROR_DENIED; |
| 904 | goto err_arg; |
| 905 | } |
| 906 | |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 907 | /* Ensure the NS bit is set to 0. */ |
| 908 | if ((obj->desc.memory_region_attributes & FFA_MEM_ATTR_NS_BIT) != 0U) { |
| 909 | WARN("%s: NS mem attributes flags MBZ.\n", __func__); |
| 910 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 911 | goto err_arg; |
| 912 | } |
| 913 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 914 | /* |
| 915 | * We don't currently support any optional flags so ensure none are |
| 916 | * requested. |
| 917 | */ |
| 918 | if (obj->desc.flags != 0U && mtd_flag != 0U && |
| 919 | (obj->desc.flags != mtd_flag)) { |
| 920 | WARN("%s: invalid memory transaction flags %u != %u\n", |
| 921 | __func__, obj->desc.flags, mtd_flag); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 922 | ret = FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 923 | goto err_arg; |
| 924 | } |
| 925 | |
| 926 | if (obj->desc_filled == 0U) { |
| 927 | /* First fragment, descriptor header has been copied */ |
| 928 | obj->desc.handle = spmc_shmem_obj_state.next_handle++; |
| 929 | obj->desc.flags |= mtd_flag; |
| 930 | } |
| 931 | |
| 932 | obj->desc_filled += fragment_length; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 933 | ret = spmc_shmem_check_obj(obj, ffa_version); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 934 | if (ret != 0) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 935 | ret = FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 936 | goto err_bad_desc; |
| 937 | } |
| 938 | |
| 939 | handle_low = (uint32_t)obj->desc.handle; |
| 940 | handle_high = obj->desc.handle >> 32; |
| 941 | |
| 942 | if (obj->desc_filled != obj->desc_size) { |
| 943 | SMC_RET8(smc_handle, FFA_MEM_FRAG_RX, handle_low, |
| 944 | handle_high, obj->desc_filled, |
| 945 | (uint32_t)obj->desc.sender_id << 16, 0, 0, 0); |
| 946 | } |
| 947 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 948 | /* The full descriptor has been received, perform any final checks. */ |
| 949 | |
| 950 | /* |
| 951 | * If a partition ID resides in the secure world validate that the |
| 952 | * partition ID is for a known partition. Ignore any partition ID |
| 953 | * belonging to the normal world as it is assumed the Hypervisor will |
| 954 | * have validated these. |
| 955 | */ |
| 956 | for (size_t i = 0; i < obj->desc.emad_count; i++) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 957 | emad = spmc_shmem_obj_get_emad(&obj->desc, i, ffa_version, |
| 958 | &emad_size); |
| 959 | if (emad == NULL) { |
| 960 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 961 | goto err_bad_desc; |
| 962 | } |
| 963 | |
| 964 | ffa_endpoint_id16_t ep_id = emad->mapd.endpoint_id; |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 965 | |
| 966 | if (ffa_is_secure_world_id(ep_id)) { |
| 967 | if (spmc_get_sp_ctx(ep_id) == NULL) { |
| 968 | WARN("%s: Invalid receiver id 0x%x\n", |
| 969 | __func__, ep_id); |
| 970 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 971 | goto err_bad_desc; |
| 972 | } |
| 973 | } |
| 974 | } |
| 975 | |
| 976 | /* Ensure partition IDs are not duplicated. */ |
| 977 | for (size_t i = 0; i < obj->desc.emad_count; i++) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 978 | emad = spmc_shmem_obj_get_emad(&obj->desc, i, ffa_version, |
| 979 | &emad_size); |
| 980 | if (emad == NULL) { |
| 981 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 982 | goto err_bad_desc; |
| 983 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 984 | for (size_t j = i + 1; j < obj->desc.emad_count; j++) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 985 | other_emad = spmc_shmem_obj_get_emad(&obj->desc, j, |
| 986 | ffa_version, |
| 987 | &emad_size); |
| 988 | if (other_emad == NULL) { |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 989 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 990 | goto err_bad_desc; |
| 991 | } |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 992 | |
| 993 | if (emad->mapd.endpoint_id == |
| 994 | other_emad->mapd.endpoint_id) { |
| 995 | WARN("%s: Duplicated endpoint id 0x%x\n", |
| 996 | __func__, emad->mapd.endpoint_id); |
| 997 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 998 | goto err_bad_desc; |
| 999 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1000 | } |
| 1001 | } |
| 1002 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1003 | ret = spmc_shmem_check_state_obj(obj, ffa_version); |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 1004 | if (ret) { |
| 1005 | ERROR("%s: invalid memory region descriptor.\n", __func__); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1006 | ret = FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 1007 | goto err_bad_desc; |
| 1008 | } |
| 1009 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1010 | /* |
| 1011 | * Everything checks out, if the sender was using FF-A v1.0, convert |
| 1012 | * the descriptor format to use the v1.1 structures. |
| 1013 | */ |
| 1014 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 1015 | struct spmc_shmem_obj *v1_1_obj; |
| 1016 | uint64_t mem_handle; |
| 1017 | |
| 1018 | /* Calculate the size that the v1.1 descriptor will required. */ |
| 1019 | size_t v1_1_desc_size = |
| 1020 | spmc_shm_get_v1_1_descriptor_size((void *) &obj->desc, |
vallau01 | 46dbac2 | 2022-08-08 14:10:14 +0200 | [diff] [blame] | 1021 | obj->desc_size); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1022 | |
| 1023 | if (v1_1_desc_size == 0U) { |
| 1024 | ERROR("%s: cannot determine size of descriptor.\n", |
| 1025 | __func__); |
| 1026 | goto err_arg; |
| 1027 | } |
| 1028 | |
| 1029 | /* Get a new obj to store the v1.1 descriptor. */ |
| 1030 | v1_1_obj = |
| 1031 | spmc_shmem_obj_alloc(&spmc_shmem_obj_state, v1_1_desc_size); |
| 1032 | |
vallau01 | 8f83099 | 2022-08-09 18:03:28 +0200 | [diff] [blame] | 1033 | if (!v1_1_obj) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1034 | ret = FFA_ERROR_NO_MEMORY; |
| 1035 | goto err_arg; |
| 1036 | } |
| 1037 | |
| 1038 | /* Perform the conversion from v1.0 to v1.1. */ |
| 1039 | v1_1_obj->desc_size = v1_1_desc_size; |
| 1040 | v1_1_obj->desc_filled = v1_1_desc_size; |
| 1041 | if (!spmc_shm_convert_shmem_obj_from_v1_0(v1_1_obj, obj)) { |
| 1042 | ERROR("%s: Could not convert mtd!\n", __func__); |
| 1043 | spmc_shmem_obj_free(&spmc_shmem_obj_state, v1_1_obj); |
| 1044 | goto err_arg; |
| 1045 | } |
| 1046 | |
| 1047 | /* |
| 1048 | * We're finished with the v1.0 descriptor so free it |
| 1049 | * and continue our checks with the new v1.1 descriptor. |
| 1050 | */ |
| 1051 | mem_handle = obj->desc.handle; |
| 1052 | spmc_shmem_obj_free(&spmc_shmem_obj_state, obj); |
| 1053 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| 1054 | if (obj == NULL) { |
| 1055 | ERROR("%s: Failed to find converted descriptor.\n", |
| 1056 | __func__); |
| 1057 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1058 | return spmc_ffa_error_return(smc_handle, ret); |
| 1059 | } |
| 1060 | } |
| 1061 | |
Marc Bonnici | 503320e | 2022-02-21 15:02:36 +0000 | [diff] [blame] | 1062 | /* Allow for platform specific operations to be performed. */ |
| 1063 | ret = plat_spmc_shmem_begin(&obj->desc); |
| 1064 | if (ret != 0) { |
| 1065 | goto err_arg; |
| 1066 | } |
| 1067 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1068 | SMC_RET8(smc_handle, FFA_SUCCESS_SMC32, 0, handle_low, handle_high, 0, |
| 1069 | 0, 0, 0); |
| 1070 | |
| 1071 | err_bad_desc: |
| 1072 | err_arg: |
| 1073 | spmc_shmem_obj_free(&spmc_shmem_obj_state, obj); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1074 | return spmc_ffa_error_return(smc_handle, ret); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1075 | } |
| 1076 | |
| 1077 | /** |
| 1078 | * spmc_ffa_mem_send - FFA_MEM_SHARE/LEND implementation. |
| 1079 | * @client: Client state. |
| 1080 | * @total_length: Total length of shared memory descriptor. |
| 1081 | * @fragment_length: Length of fragment of shared memory descriptor passed in |
| 1082 | * this call. |
| 1083 | * @address: Not supported, must be 0. |
| 1084 | * @page_count: Not supported, must be 0. |
| 1085 | * @smc_handle: Handle passed to smc call. Used to return |
| 1086 | * FFA_MEM_FRAG_RX or SMC_FC_FFA_SUCCESS. |
| 1087 | * |
| 1088 | * Implements a subset of the FF-A FFA_MEM_SHARE and FFA_MEM_LEND calls needed |
| 1089 | * to share or lend memory from non-secure os to secure os (with no stream |
| 1090 | * endpoints). |
| 1091 | * |
| 1092 | * Return: 0 on success, error code on failure. |
| 1093 | */ |
| 1094 | long spmc_ffa_mem_send(uint32_t smc_fid, |
| 1095 | bool secure_origin, |
| 1096 | uint64_t total_length, |
| 1097 | uint32_t fragment_length, |
| 1098 | uint64_t address, |
| 1099 | uint32_t page_count, |
| 1100 | void *cookie, |
| 1101 | void *handle, |
| 1102 | uint64_t flags) |
| 1103 | |
| 1104 | { |
| 1105 | long ret; |
| 1106 | struct spmc_shmem_obj *obj; |
| 1107 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 1108 | ffa_mtd_flag32_t mtd_flag; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1109 | uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1110 | |
| 1111 | if (address != 0U || page_count != 0U) { |
| 1112 | WARN("%s: custom memory region for message not supported.\n", |
| 1113 | __func__); |
| 1114 | return spmc_ffa_error_return(handle, |
| 1115 | FFA_ERROR_INVALID_PARAMETER); |
| 1116 | } |
| 1117 | |
| 1118 | if (secure_origin) { |
| 1119 | WARN("%s: unsupported share direction.\n", __func__); |
| 1120 | return spmc_ffa_error_return(handle, |
| 1121 | FFA_ERROR_INVALID_PARAMETER); |
| 1122 | } |
| 1123 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1124 | /* |
| 1125 | * Check if the descriptor is smaller than the v1.0 descriptor. The |
| 1126 | * descriptor cannot be smaller than this structure. |
| 1127 | */ |
| 1128 | if (fragment_length < sizeof(struct ffa_mtd_v1_0)) { |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1129 | WARN("%s: bad first fragment size %u < %zu\n", |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1130 | __func__, fragment_length, sizeof(struct ffa_mtd_v1_0)); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1131 | return spmc_ffa_error_return(handle, |
| 1132 | FFA_ERROR_INVALID_PARAMETER); |
| 1133 | } |
| 1134 | |
| 1135 | if ((smc_fid & FUNCID_NUM_MASK) == FFA_FNUM_MEM_SHARE) { |
| 1136 | mtd_flag = FFA_MTD_FLAG_TYPE_SHARE_MEMORY; |
| 1137 | } else if ((smc_fid & FUNCID_NUM_MASK) == FFA_FNUM_MEM_LEND) { |
| 1138 | mtd_flag = FFA_MTD_FLAG_TYPE_LEND_MEMORY; |
| 1139 | } else { |
| 1140 | WARN("%s: invalid memory management operation.\n", __func__); |
| 1141 | return spmc_ffa_error_return(handle, |
| 1142 | FFA_ERROR_INVALID_PARAMETER); |
| 1143 | } |
| 1144 | |
| 1145 | spin_lock(&spmc_shmem_obj_state.lock); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1146 | obj = spmc_shmem_obj_alloc(&spmc_shmem_obj_state, total_length); |
| 1147 | if (obj == NULL) { |
| 1148 | ret = FFA_ERROR_NO_MEMORY; |
| 1149 | goto err_unlock; |
| 1150 | } |
| 1151 | |
| 1152 | spin_lock(&mbox->lock); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1153 | ret = spmc_ffa_fill_desc(mbox, obj, fragment_length, mtd_flag, |
| 1154 | ffa_version, handle); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1155 | spin_unlock(&mbox->lock); |
| 1156 | |
| 1157 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1158 | return ret; |
| 1159 | |
| 1160 | err_unlock: |
| 1161 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1162 | return spmc_ffa_error_return(handle, ret); |
| 1163 | } |
| 1164 | |
| 1165 | /** |
| 1166 | * spmc_ffa_mem_frag_tx - FFA_MEM_FRAG_TX implementation. |
| 1167 | * @client: Client state. |
| 1168 | * @handle_low: Handle_low value returned from FFA_MEM_FRAG_RX. |
| 1169 | * @handle_high: Handle_high value returned from FFA_MEM_FRAG_RX. |
| 1170 | * @fragment_length: Length of fragments transmitted. |
| 1171 | * @sender_id: Vmid of sender in bits [31:16] |
| 1172 | * @smc_handle: Handle passed to smc call. Used to return |
| 1173 | * FFA_MEM_FRAG_RX or SMC_FC_FFA_SUCCESS. |
| 1174 | * |
| 1175 | * Return: @smc_handle on success, error code on failure. |
| 1176 | */ |
| 1177 | long spmc_ffa_mem_frag_tx(uint32_t smc_fid, |
| 1178 | bool secure_origin, |
| 1179 | uint64_t handle_low, |
| 1180 | uint64_t handle_high, |
| 1181 | uint32_t fragment_length, |
| 1182 | uint32_t sender_id, |
| 1183 | void *cookie, |
| 1184 | void *handle, |
| 1185 | uint64_t flags) |
| 1186 | { |
| 1187 | long ret; |
| 1188 | uint32_t desc_sender_id; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1189 | uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1190 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 1191 | |
| 1192 | struct spmc_shmem_obj *obj; |
| 1193 | uint64_t mem_handle = handle_low | (((uint64_t)handle_high) << 32); |
| 1194 | |
| 1195 | spin_lock(&spmc_shmem_obj_state.lock); |
| 1196 | |
| 1197 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| 1198 | if (obj == NULL) { |
| 1199 | WARN("%s: invalid handle, 0x%lx, not a valid handle.\n", |
| 1200 | __func__, mem_handle); |
| 1201 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1202 | goto err_unlock; |
| 1203 | } |
| 1204 | |
| 1205 | desc_sender_id = (uint32_t)obj->desc.sender_id << 16; |
| 1206 | if (sender_id != desc_sender_id) { |
| 1207 | WARN("%s: invalid sender_id 0x%x != 0x%x\n", __func__, |
| 1208 | sender_id, desc_sender_id); |
| 1209 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1210 | goto err_unlock; |
| 1211 | } |
| 1212 | |
| 1213 | if (obj->desc_filled == obj->desc_size) { |
| 1214 | WARN("%s: object desc already filled, %zu\n", __func__, |
| 1215 | obj->desc_filled); |
| 1216 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1217 | goto err_unlock; |
| 1218 | } |
| 1219 | |
| 1220 | spin_lock(&mbox->lock); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1221 | ret = spmc_ffa_fill_desc(mbox, obj, fragment_length, 0, ffa_version, |
| 1222 | handle); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1223 | spin_unlock(&mbox->lock); |
| 1224 | |
| 1225 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1226 | return ret; |
| 1227 | |
| 1228 | err_unlock: |
| 1229 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1230 | return spmc_ffa_error_return(handle, ret); |
| 1231 | } |
| 1232 | |
| 1233 | /** |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1234 | * spmc_ffa_mem_retrieve_set_ns_bit - Set the NS bit in the response descriptor |
| 1235 | * if the caller implements a version greater |
| 1236 | * than FF-A 1.0 or if they have requested |
| 1237 | * the functionality. |
| 1238 | * TODO: We are assuming that the caller is |
| 1239 | * an SP. To support retrieval from the |
| 1240 | * normal world this function will need to be |
| 1241 | * expanded accordingly. |
| 1242 | * @resp: Descriptor populated in callers RX buffer. |
| 1243 | * @sp_ctx: Context of the calling SP. |
| 1244 | */ |
| 1245 | void spmc_ffa_mem_retrieve_set_ns_bit(struct ffa_mtd *resp, |
| 1246 | struct secure_partition_desc *sp_ctx) |
| 1247 | { |
| 1248 | if (sp_ctx->ffa_version > MAKE_FFA_VERSION(1, 0) || |
| 1249 | sp_ctx->ns_bit_requested) { |
| 1250 | /* |
| 1251 | * Currently memory senders must reside in the normal |
| 1252 | * world, and we do not have the functionlaity to change |
| 1253 | * the state of memory dynamically. Therefore we can always set |
| 1254 | * the NS bit to 1. |
| 1255 | */ |
| 1256 | resp->memory_region_attributes |= FFA_MEM_ATTR_NS_BIT; |
| 1257 | } |
| 1258 | } |
| 1259 | |
| 1260 | /** |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1261 | * spmc_ffa_mem_retrieve_req - FFA_MEM_RETRIEVE_REQ implementation. |
| 1262 | * @smc_fid: FID of SMC |
| 1263 | * @total_length: Total length of retrieve request descriptor if this is |
| 1264 | * the first call. Otherwise (unsupported) must be 0. |
| 1265 | * @fragment_length: Length of fragment of retrieve request descriptor passed |
| 1266 | * in this call. Only @fragment_length == @length is |
| 1267 | * supported by this implementation. |
| 1268 | * @address: Not supported, must be 0. |
| 1269 | * @page_count: Not supported, must be 0. |
| 1270 | * @smc_handle: Handle passed to smc call. Used to return |
| 1271 | * FFA_MEM_RETRIEVE_RESP. |
| 1272 | * |
| 1273 | * Implements a subset of the FF-A FFA_MEM_RETRIEVE_REQ call. |
| 1274 | * Used by secure os to retrieve memory already shared by non-secure os. |
| 1275 | * If the data does not fit in a single FFA_MEM_RETRIEVE_RESP message, |
| 1276 | * the client must call FFA_MEM_FRAG_RX until the full response has been |
| 1277 | * received. |
| 1278 | * |
| 1279 | * Return: @handle on success, error code on failure. |
| 1280 | */ |
| 1281 | long |
| 1282 | spmc_ffa_mem_retrieve_req(uint32_t smc_fid, |
| 1283 | bool secure_origin, |
| 1284 | uint32_t total_length, |
| 1285 | uint32_t fragment_length, |
| 1286 | uint64_t address, |
| 1287 | uint32_t page_count, |
| 1288 | void *cookie, |
| 1289 | void *handle, |
| 1290 | uint64_t flags) |
| 1291 | { |
| 1292 | int ret; |
| 1293 | size_t buf_size; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1294 | size_t copy_size = 0; |
| 1295 | size_t min_desc_size; |
| 1296 | size_t out_desc_size = 0; |
| 1297 | |
| 1298 | /* |
| 1299 | * Currently we are only accessing fields that are the same in both the |
| 1300 | * v1.0 and v1.1 mtd struct therefore we can use a v1.1 struct directly |
| 1301 | * here. We only need validate against the appropriate struct size. |
| 1302 | */ |
| 1303 | struct ffa_mtd *resp; |
| 1304 | const struct ffa_mtd *req; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1305 | struct spmc_shmem_obj *obj = NULL; |
| 1306 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1307 | uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1308 | struct secure_partition_desc *sp_ctx = spmc_get_current_sp_ctx(); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1309 | |
| 1310 | if (!secure_origin) { |
| 1311 | WARN("%s: unsupported retrieve req direction.\n", __func__); |
| 1312 | return spmc_ffa_error_return(handle, |
| 1313 | FFA_ERROR_INVALID_PARAMETER); |
| 1314 | } |
| 1315 | |
| 1316 | if (address != 0U || page_count != 0U) { |
| 1317 | WARN("%s: custom memory region not supported.\n", __func__); |
| 1318 | return spmc_ffa_error_return(handle, |
| 1319 | FFA_ERROR_INVALID_PARAMETER); |
| 1320 | } |
| 1321 | |
| 1322 | spin_lock(&mbox->lock); |
| 1323 | |
| 1324 | req = mbox->tx_buffer; |
| 1325 | resp = mbox->rx_buffer; |
| 1326 | buf_size = mbox->rxtx_page_count * FFA_PAGE_SIZE; |
| 1327 | |
| 1328 | if (mbox->rxtx_page_count == 0U) { |
| 1329 | WARN("%s: buffer pair not registered.\n", __func__); |
| 1330 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1331 | goto err_unlock_mailbox; |
| 1332 | } |
| 1333 | |
| 1334 | if (mbox->state != MAILBOX_STATE_EMPTY) { |
| 1335 | WARN("%s: RX Buffer is full! %d\n", __func__, mbox->state); |
| 1336 | ret = FFA_ERROR_DENIED; |
| 1337 | goto err_unlock_mailbox; |
| 1338 | } |
| 1339 | |
| 1340 | if (fragment_length != total_length) { |
| 1341 | WARN("%s: fragmented retrieve request not supported.\n", |
| 1342 | __func__); |
| 1343 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1344 | goto err_unlock_mailbox; |
| 1345 | } |
| 1346 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1347 | if (req->emad_count == 0U) { |
| 1348 | WARN("%s: unsupported attribute desc count %u.\n", |
| 1349 | __func__, obj->desc.emad_count); |
vallau01 | 460d396 | 2022-08-09 17:06:53 +0200 | [diff] [blame] | 1350 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1351 | goto err_unlock_mailbox; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1352 | } |
| 1353 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1354 | /* Determine the appropriate minimum descriptor size. */ |
| 1355 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 1356 | min_desc_size = sizeof(struct ffa_mtd_v1_0); |
| 1357 | } else { |
| 1358 | min_desc_size = sizeof(struct ffa_mtd); |
| 1359 | } |
| 1360 | if (total_length < min_desc_size) { |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1361 | WARN("%s: invalid length %u < %zu\n", __func__, total_length, |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1362 | min_desc_size); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1363 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1364 | goto err_unlock_mailbox; |
| 1365 | } |
| 1366 | |
| 1367 | spin_lock(&spmc_shmem_obj_state.lock); |
| 1368 | |
| 1369 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, req->handle); |
| 1370 | if (obj == NULL) { |
| 1371 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1372 | goto err_unlock_all; |
| 1373 | } |
| 1374 | |
| 1375 | if (obj->desc_filled != obj->desc_size) { |
| 1376 | WARN("%s: incomplete object desc filled %zu < size %zu\n", |
| 1377 | __func__, obj->desc_filled, obj->desc_size); |
| 1378 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1379 | goto err_unlock_all; |
| 1380 | } |
| 1381 | |
| 1382 | if (req->emad_count != 0U && req->sender_id != obj->desc.sender_id) { |
| 1383 | WARN("%s: wrong sender id 0x%x != 0x%x\n", |
| 1384 | __func__, req->sender_id, obj->desc.sender_id); |
| 1385 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1386 | goto err_unlock_all; |
| 1387 | } |
| 1388 | |
| 1389 | if (req->emad_count != 0U && req->tag != obj->desc.tag) { |
| 1390 | WARN("%s: wrong tag 0x%lx != 0x%lx\n", |
| 1391 | __func__, req->tag, obj->desc.tag); |
| 1392 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1393 | goto err_unlock_all; |
| 1394 | } |
| 1395 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1396 | if (req->emad_count != 0U && req->emad_count != obj->desc.emad_count) { |
| 1397 | WARN("%s: mistmatch of endpoint counts %u != %u\n", |
| 1398 | __func__, req->emad_count, obj->desc.emad_count); |
| 1399 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1400 | goto err_unlock_all; |
| 1401 | } |
| 1402 | |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1403 | /* Ensure the NS bit is set to 0 in the request. */ |
| 1404 | if ((req->memory_region_attributes & FFA_MEM_ATTR_NS_BIT) != 0U) { |
| 1405 | WARN("%s: NS mem attributes flags MBZ.\n", __func__); |
| 1406 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1407 | goto err_unlock_all; |
| 1408 | } |
| 1409 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1410 | if (req->flags != 0U) { |
| 1411 | if ((req->flags & FFA_MTD_FLAG_TYPE_MASK) != |
| 1412 | (obj->desc.flags & FFA_MTD_FLAG_TYPE_MASK)) { |
| 1413 | /* |
| 1414 | * If the retrieve request specifies the memory |
| 1415 | * transaction ensure it matches what we expect. |
| 1416 | */ |
| 1417 | WARN("%s: wrong mem transaction flags %x != %x\n", |
| 1418 | __func__, req->flags, obj->desc.flags); |
| 1419 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1420 | goto err_unlock_all; |
| 1421 | } |
| 1422 | |
| 1423 | if (req->flags != FFA_MTD_FLAG_TYPE_SHARE_MEMORY && |
| 1424 | req->flags != FFA_MTD_FLAG_TYPE_LEND_MEMORY) { |
| 1425 | /* |
| 1426 | * Current implementation does not support donate and |
| 1427 | * it supports no other flags. |
| 1428 | */ |
| 1429 | WARN("%s: invalid flags 0x%x\n", __func__, req->flags); |
| 1430 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1431 | goto err_unlock_all; |
| 1432 | } |
| 1433 | } |
| 1434 | |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1435 | /* Validate the caller is a valid participant. */ |
| 1436 | if (!spmc_shmem_obj_validate_id(&obj->desc, sp_ctx->sp_id)) { |
| 1437 | WARN("%s: Invalid endpoint ID (0x%x).\n", |
| 1438 | __func__, sp_ctx->sp_id); |
| 1439 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1440 | goto err_unlock_all; |
| 1441 | } |
| 1442 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1443 | /* Validate that the provided emad offset and structure is valid.*/ |
| 1444 | for (size_t i = 0; i < req->emad_count; i++) { |
| 1445 | size_t emad_size; |
| 1446 | struct ffa_emad_v1_0 *emad; |
| 1447 | |
| 1448 | emad = spmc_shmem_obj_get_emad(req, i, ffa_version, |
| 1449 | &emad_size); |
| 1450 | if (emad == NULL) { |
| 1451 | WARN("%s: invalid emad structure.\n", __func__); |
| 1452 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1453 | goto err_unlock_all; |
| 1454 | } |
| 1455 | |
| 1456 | if ((uintptr_t) emad >= (uintptr_t) |
| 1457 | ((uint8_t *) req + total_length)) { |
| 1458 | WARN("Invalid emad access.\n"); |
| 1459 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1460 | goto err_unlock_all; |
| 1461 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1462 | } |
| 1463 | |
| 1464 | /* |
| 1465 | * Validate all the endpoints match in the case of multiple |
| 1466 | * borrowers. We don't mandate that the order of the borrowers |
| 1467 | * must match in the descriptors therefore check to see if the |
| 1468 | * endpoints match in any order. |
| 1469 | */ |
| 1470 | for (size_t i = 0; i < req->emad_count; i++) { |
| 1471 | bool found = false; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1472 | size_t emad_size; |
| 1473 | struct ffa_emad_v1_0 *emad; |
| 1474 | struct ffa_emad_v1_0 *other_emad; |
| 1475 | |
| 1476 | emad = spmc_shmem_obj_get_emad(req, i, ffa_version, |
| 1477 | &emad_size); |
| 1478 | if (emad == NULL) { |
| 1479 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1480 | goto err_unlock_all; |
| 1481 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1482 | |
| 1483 | for (size_t j = 0; j < obj->desc.emad_count; j++) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1484 | other_emad = spmc_shmem_obj_get_emad( |
| 1485 | &obj->desc, j, MAKE_FFA_VERSION(1, 1), |
| 1486 | &emad_size); |
| 1487 | |
| 1488 | if (other_emad == NULL) { |
| 1489 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1490 | goto err_unlock_all; |
| 1491 | } |
| 1492 | |
| 1493 | if (req->emad_count && |
| 1494 | emad->mapd.endpoint_id == |
| 1495 | other_emad->mapd.endpoint_id) { |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1496 | found = true; |
| 1497 | break; |
| 1498 | } |
| 1499 | } |
| 1500 | |
| 1501 | if (!found) { |
| 1502 | WARN("%s: invalid receiver id (0x%x).\n", |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1503 | __func__, emad->mapd.endpoint_id); |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1504 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1505 | goto err_unlock_all; |
| 1506 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1507 | } |
| 1508 | |
| 1509 | mbox->state = MAILBOX_STATE_FULL; |
| 1510 | |
| 1511 | if (req->emad_count != 0U) { |
| 1512 | obj->in_use++; |
| 1513 | } |
| 1514 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1515 | /* |
| 1516 | * If the caller is v1.0 convert the descriptor, otherwise copy |
| 1517 | * directly. |
| 1518 | */ |
| 1519 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 1520 | ret = spmc_populate_ffa_v1_0_descriptor(resp, obj, buf_size, 0, |
| 1521 | ©_size, |
| 1522 | &out_desc_size); |
| 1523 | if (ret != 0U) { |
| 1524 | ERROR("%s: Failed to process descriptor.\n", __func__); |
| 1525 | goto err_unlock_all; |
| 1526 | } |
| 1527 | } else { |
| 1528 | copy_size = MIN(obj->desc_size, buf_size); |
| 1529 | out_desc_size = obj->desc_size; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1530 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1531 | memcpy(resp, &obj->desc, copy_size); |
| 1532 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1533 | |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1534 | /* Set the NS bit in the response if applicable. */ |
| 1535 | spmc_ffa_mem_retrieve_set_ns_bit(resp, sp_ctx); |
| 1536 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1537 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1538 | spin_unlock(&mbox->lock); |
| 1539 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1540 | SMC_RET8(handle, FFA_MEM_RETRIEVE_RESP, out_desc_size, |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1541 | copy_size, 0, 0, 0, 0, 0); |
| 1542 | |
| 1543 | err_unlock_all: |
| 1544 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1545 | err_unlock_mailbox: |
| 1546 | spin_unlock(&mbox->lock); |
| 1547 | return spmc_ffa_error_return(handle, ret); |
| 1548 | } |
| 1549 | |
| 1550 | /** |
| 1551 | * spmc_ffa_mem_frag_rx - FFA_MEM_FRAG_RX implementation. |
| 1552 | * @client: Client state. |
| 1553 | * @handle_low: Handle passed to &FFA_MEM_RETRIEVE_REQ. Bit[31:0]. |
| 1554 | * @handle_high: Handle passed to &FFA_MEM_RETRIEVE_REQ. Bit[63:32]. |
| 1555 | * @fragment_offset: Byte offset in descriptor to resume at. |
| 1556 | * @sender_id: Bit[31:16]: Endpoint id of sender if client is a |
| 1557 | * hypervisor. 0 otherwise. |
| 1558 | * @smc_handle: Handle passed to smc call. Used to return |
| 1559 | * FFA_MEM_FRAG_TX. |
| 1560 | * |
| 1561 | * Return: @smc_handle on success, error code on failure. |
| 1562 | */ |
| 1563 | long spmc_ffa_mem_frag_rx(uint32_t smc_fid, |
| 1564 | bool secure_origin, |
| 1565 | uint32_t handle_low, |
| 1566 | uint32_t handle_high, |
| 1567 | uint32_t fragment_offset, |
| 1568 | uint32_t sender_id, |
| 1569 | void *cookie, |
| 1570 | void *handle, |
| 1571 | uint64_t flags) |
| 1572 | { |
| 1573 | int ret; |
| 1574 | void *src; |
| 1575 | size_t buf_size; |
| 1576 | size_t copy_size; |
| 1577 | size_t full_copy_size; |
| 1578 | uint32_t desc_sender_id; |
| 1579 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 1580 | uint64_t mem_handle = handle_low | (((uint64_t)handle_high) << 32); |
| 1581 | struct spmc_shmem_obj *obj; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1582 | uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1583 | |
| 1584 | if (!secure_origin) { |
| 1585 | WARN("%s: can only be called from swld.\n", |
| 1586 | __func__); |
| 1587 | return spmc_ffa_error_return(handle, |
| 1588 | FFA_ERROR_INVALID_PARAMETER); |
| 1589 | } |
| 1590 | |
| 1591 | spin_lock(&spmc_shmem_obj_state.lock); |
| 1592 | |
| 1593 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| 1594 | if (obj == NULL) { |
| 1595 | WARN("%s: invalid handle, 0x%lx, not a valid handle.\n", |
| 1596 | __func__, mem_handle); |
| 1597 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1598 | goto err_unlock_shmem; |
| 1599 | } |
| 1600 | |
| 1601 | desc_sender_id = (uint32_t)obj->desc.sender_id << 16; |
| 1602 | if (sender_id != 0U && sender_id != desc_sender_id) { |
| 1603 | WARN("%s: invalid sender_id 0x%x != 0x%x\n", __func__, |
| 1604 | sender_id, desc_sender_id); |
| 1605 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1606 | goto err_unlock_shmem; |
| 1607 | } |
| 1608 | |
| 1609 | if (fragment_offset >= obj->desc_size) { |
| 1610 | WARN("%s: invalid fragment_offset 0x%x >= 0x%zx\n", |
| 1611 | __func__, fragment_offset, obj->desc_size); |
| 1612 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1613 | goto err_unlock_shmem; |
| 1614 | } |
| 1615 | |
| 1616 | spin_lock(&mbox->lock); |
| 1617 | |
| 1618 | if (mbox->rxtx_page_count == 0U) { |
| 1619 | WARN("%s: buffer pair not registered.\n", __func__); |
| 1620 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1621 | goto err_unlock_all; |
| 1622 | } |
| 1623 | |
| 1624 | if (mbox->state != MAILBOX_STATE_EMPTY) { |
| 1625 | WARN("%s: RX Buffer is full!\n", __func__); |
| 1626 | ret = FFA_ERROR_DENIED; |
| 1627 | goto err_unlock_all; |
| 1628 | } |
| 1629 | |
| 1630 | buf_size = mbox->rxtx_page_count * FFA_PAGE_SIZE; |
| 1631 | |
| 1632 | mbox->state = MAILBOX_STATE_FULL; |
| 1633 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1634 | /* |
| 1635 | * If the caller is v1.0 convert the descriptor, otherwise copy |
| 1636 | * directly. |
| 1637 | */ |
| 1638 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 1639 | size_t out_desc_size; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1640 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1641 | ret = spmc_populate_ffa_v1_0_descriptor(mbox->rx_buffer, obj, |
| 1642 | buf_size, |
| 1643 | fragment_offset, |
| 1644 | ©_size, |
| 1645 | &out_desc_size); |
| 1646 | if (ret != 0U) { |
| 1647 | ERROR("%s: Failed to process descriptor.\n", __func__); |
| 1648 | goto err_unlock_all; |
| 1649 | } |
| 1650 | } else { |
| 1651 | full_copy_size = obj->desc_size - fragment_offset; |
| 1652 | copy_size = MIN(full_copy_size, buf_size); |
| 1653 | |
| 1654 | src = &obj->desc; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1655 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1656 | memcpy(mbox->rx_buffer, src + fragment_offset, copy_size); |
| 1657 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1658 | |
| 1659 | spin_unlock(&mbox->lock); |
| 1660 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1661 | |
| 1662 | SMC_RET8(handle, FFA_MEM_FRAG_TX, handle_low, handle_high, |
| 1663 | copy_size, sender_id, 0, 0, 0); |
| 1664 | |
| 1665 | err_unlock_all: |
| 1666 | spin_unlock(&mbox->lock); |
| 1667 | err_unlock_shmem: |
| 1668 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1669 | return spmc_ffa_error_return(handle, ret); |
| 1670 | } |
| 1671 | |
| 1672 | /** |
| 1673 | * spmc_ffa_mem_relinquish - FFA_MEM_RELINQUISH implementation. |
| 1674 | * @client: Client state. |
| 1675 | * |
| 1676 | * Implements a subset of the FF-A FFA_MEM_RELINQUISH call. |
| 1677 | * Used by secure os release previously shared memory to non-secure os. |
| 1678 | * |
| 1679 | * The handle to release must be in the client's (secure os's) transmit buffer. |
| 1680 | * |
| 1681 | * Return: 0 on success, error code on failure. |
| 1682 | */ |
| 1683 | int spmc_ffa_mem_relinquish(uint32_t smc_fid, |
| 1684 | bool secure_origin, |
| 1685 | uint32_t handle_low, |
| 1686 | uint32_t handle_high, |
| 1687 | uint32_t fragment_offset, |
| 1688 | uint32_t sender_id, |
| 1689 | void *cookie, |
| 1690 | void *handle, |
| 1691 | uint64_t flags) |
| 1692 | { |
| 1693 | int ret; |
| 1694 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 1695 | struct spmc_shmem_obj *obj; |
| 1696 | const struct ffa_mem_relinquish_descriptor *req; |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1697 | struct secure_partition_desc *sp_ctx = spmc_get_current_sp_ctx(); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1698 | |
| 1699 | if (!secure_origin) { |
| 1700 | WARN("%s: unsupported relinquish direction.\n", __func__); |
| 1701 | return spmc_ffa_error_return(handle, |
| 1702 | FFA_ERROR_INVALID_PARAMETER); |
| 1703 | } |
| 1704 | |
| 1705 | spin_lock(&mbox->lock); |
| 1706 | |
| 1707 | if (mbox->rxtx_page_count == 0U) { |
| 1708 | WARN("%s: buffer pair not registered.\n", __func__); |
| 1709 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1710 | goto err_unlock_mailbox; |
| 1711 | } |
| 1712 | |
| 1713 | req = mbox->tx_buffer; |
| 1714 | |
| 1715 | if (req->flags != 0U) { |
| 1716 | WARN("%s: unsupported flags 0x%x\n", __func__, req->flags); |
| 1717 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1718 | goto err_unlock_mailbox; |
| 1719 | } |
| 1720 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1721 | if (req->endpoint_count == 0) { |
| 1722 | WARN("%s: endpoint count cannot be 0.\n", __func__); |
| 1723 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1724 | goto err_unlock_mailbox; |
| 1725 | } |
| 1726 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1727 | spin_lock(&spmc_shmem_obj_state.lock); |
| 1728 | |
| 1729 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, req->handle); |
| 1730 | if (obj == NULL) { |
| 1731 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1732 | goto err_unlock_all; |
| 1733 | } |
| 1734 | |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1735 | /* |
| 1736 | * Validate the endpoint ID was populated correctly. We don't currently |
| 1737 | * support proxy endpoints so the endpoint count should always be 1. |
| 1738 | */ |
| 1739 | if (req->endpoint_count != 1U) { |
| 1740 | WARN("%s: unsupported endpoint count %u != 1\n", __func__, |
| 1741 | req->endpoint_count); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1742 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1743 | goto err_unlock_all; |
| 1744 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1745 | |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1746 | /* Validate provided endpoint ID matches the partition ID. */ |
| 1747 | if (req->endpoint_array[0] != sp_ctx->sp_id) { |
| 1748 | WARN("%s: invalid endpoint ID %u != %u\n", __func__, |
| 1749 | req->endpoint_array[0], sp_ctx->sp_id); |
| 1750 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1751 | goto err_unlock_all; |
| 1752 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1753 | |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1754 | /* Validate the caller is a valid participant. */ |
| 1755 | if (!spmc_shmem_obj_validate_id(&obj->desc, sp_ctx->sp_id)) { |
| 1756 | WARN("%s: Invalid endpoint ID (0x%x).\n", |
| 1757 | __func__, req->endpoint_array[0]); |
| 1758 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1759 | goto err_unlock_all; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1760 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1761 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1762 | if (obj->in_use == 0U) { |
| 1763 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1764 | goto err_unlock_all; |
| 1765 | } |
| 1766 | obj->in_use--; |
| 1767 | |
| 1768 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1769 | spin_unlock(&mbox->lock); |
| 1770 | |
| 1771 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1772 | |
| 1773 | err_unlock_all: |
| 1774 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1775 | err_unlock_mailbox: |
| 1776 | spin_unlock(&mbox->lock); |
| 1777 | return spmc_ffa_error_return(handle, ret); |
| 1778 | } |
| 1779 | |
| 1780 | /** |
| 1781 | * spmc_ffa_mem_reclaim - FFA_MEM_RECLAIM implementation. |
| 1782 | * @client: Client state. |
| 1783 | * @handle_low: Unique handle of shared memory object to reclaim. Bit[31:0]. |
| 1784 | * @handle_high: Unique handle of shared memory object to reclaim. |
| 1785 | * Bit[63:32]. |
| 1786 | * @flags: Unsupported, ignored. |
| 1787 | * |
| 1788 | * Implements a subset of the FF-A FFA_MEM_RECLAIM call. |
| 1789 | * Used by non-secure os reclaim memory previously shared with secure os. |
| 1790 | * |
| 1791 | * Return: 0 on success, error code on failure. |
| 1792 | */ |
| 1793 | int spmc_ffa_mem_reclaim(uint32_t smc_fid, |
| 1794 | bool secure_origin, |
| 1795 | uint32_t handle_low, |
| 1796 | uint32_t handle_high, |
| 1797 | uint32_t mem_flags, |
| 1798 | uint64_t x4, |
| 1799 | void *cookie, |
| 1800 | void *handle, |
| 1801 | uint64_t flags) |
| 1802 | { |
| 1803 | int ret; |
| 1804 | struct spmc_shmem_obj *obj; |
| 1805 | uint64_t mem_handle = handle_low | (((uint64_t)handle_high) << 32); |
| 1806 | |
| 1807 | if (secure_origin) { |
| 1808 | WARN("%s: unsupported reclaim direction.\n", __func__); |
| 1809 | return spmc_ffa_error_return(handle, |
| 1810 | FFA_ERROR_INVALID_PARAMETER); |
| 1811 | } |
| 1812 | |
| 1813 | if (mem_flags != 0U) { |
| 1814 | WARN("%s: unsupported flags 0x%x\n", __func__, mem_flags); |
| 1815 | return spmc_ffa_error_return(handle, |
| 1816 | FFA_ERROR_INVALID_PARAMETER); |
| 1817 | } |
| 1818 | |
| 1819 | spin_lock(&spmc_shmem_obj_state.lock); |
| 1820 | |
| 1821 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| 1822 | if (obj == NULL) { |
| 1823 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1824 | goto err_unlock; |
| 1825 | } |
| 1826 | if (obj->in_use != 0U) { |
| 1827 | ret = FFA_ERROR_DENIED; |
| 1828 | goto err_unlock; |
| 1829 | } |
Marc Bonnici | 503320e | 2022-02-21 15:02:36 +0000 | [diff] [blame] | 1830 | |
| 1831 | /* Allow for platform specific operations to be performed. */ |
| 1832 | ret = plat_spmc_shmem_reclaim(&obj->desc); |
| 1833 | if (ret != 0) { |
| 1834 | goto err_unlock; |
| 1835 | } |
| 1836 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1837 | spmc_shmem_obj_free(&spmc_shmem_obj_state, obj); |
| 1838 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1839 | |
| 1840 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1841 | |
| 1842 | err_unlock: |
| 1843 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1844 | return spmc_ffa_error_return(handle, ret); |
| 1845 | } |