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; |
Marc Bonnici | b774f56 | 2022-10-18 14:03:13 +0100 | [diff] [blame] | 75 | size_t obj_size; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 76 | |
| 77 | if (state->data == NULL) { |
| 78 | ERROR("Missing shmem datastore!\n"); |
| 79 | return NULL; |
| 80 | } |
| 81 | |
Marc Bonnici | b774f56 | 2022-10-18 14:03:13 +0100 | [diff] [blame] | 82 | obj_size = spmc_shmem_obj_size(desc_size); |
| 83 | |
| 84 | /* Ensure the obj size has not overflowed. */ |
| 85 | if (obj_size < desc_size) { |
| 86 | WARN("%s(0x%zx) desc_size overflow\n", |
| 87 | __func__, desc_size); |
| 88 | return NULL; |
| 89 | } |
| 90 | |
| 91 | if (obj_size > free) { |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 92 | WARN("%s(0x%zx) failed, free 0x%zx\n", |
| 93 | __func__, desc_size, free); |
| 94 | return NULL; |
| 95 | } |
| 96 | obj = (struct spmc_shmem_obj *)(state->data + state->allocated); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 97 | obj->desc = (struct ffa_mtd) {0}; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 98 | obj->desc_size = desc_size; |
| 99 | obj->desc_filled = 0; |
| 100 | obj->in_use = 0; |
Marc Bonnici | b774f56 | 2022-10-18 14:03:13 +0100 | [diff] [blame] | 101 | state->allocated += obj_size; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 102 | return obj; |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * spmc_shmem_obj_free - Free struct spmc_shmem_obj. |
| 107 | * @state: Global state. |
| 108 | * @obj: Object to free. |
| 109 | * |
| 110 | * Release memory used by @obj. Other objects may move, so on return all |
| 111 | * pointers to struct spmc_shmem_obj object should be considered invalid, not |
| 112 | * just @obj. |
| 113 | * |
| 114 | * The current implementation always compacts the remaining objects to simplify |
| 115 | * the allocator and to avoid fragmentation. |
| 116 | */ |
| 117 | |
| 118 | static void spmc_shmem_obj_free(struct spmc_shmem_obj_state *state, |
| 119 | struct spmc_shmem_obj *obj) |
| 120 | { |
| 121 | size_t free_size = spmc_shmem_obj_size(obj->desc_size); |
| 122 | uint8_t *shift_dest = (uint8_t *)obj; |
| 123 | uint8_t *shift_src = shift_dest + free_size; |
| 124 | size_t shift_size = state->allocated - (shift_src - state->data); |
| 125 | |
| 126 | if (shift_size != 0U) { |
| 127 | memmove(shift_dest, shift_src, shift_size); |
| 128 | } |
| 129 | state->allocated -= free_size; |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * spmc_shmem_obj_lookup - Lookup struct spmc_shmem_obj by handle. |
| 134 | * @state: Global state. |
| 135 | * @handle: Unique handle of object to return. |
| 136 | * |
| 137 | * Return: struct spmc_shmem_obj_state object with handle matching @handle. |
| 138 | * %NULL, if not object in @state->data has a matching handle. |
| 139 | */ |
| 140 | static struct spmc_shmem_obj * |
| 141 | spmc_shmem_obj_lookup(struct spmc_shmem_obj_state *state, uint64_t handle) |
| 142 | { |
| 143 | uint8_t *curr = state->data; |
| 144 | |
| 145 | while (curr - state->data < state->allocated) { |
| 146 | struct spmc_shmem_obj *obj = (struct spmc_shmem_obj *)curr; |
| 147 | |
| 148 | if (obj->desc.handle == handle) { |
| 149 | return obj; |
| 150 | } |
| 151 | curr += spmc_shmem_obj_size(obj->desc_size); |
| 152 | } |
| 153 | return NULL; |
| 154 | } |
| 155 | |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 156 | /** |
| 157 | * spmc_shmem_obj_get_next - Get the next memory object from an offset. |
| 158 | * @offset: Offset used to track which objects have previously been |
| 159 | * returned. |
| 160 | * |
| 161 | * Return: the next struct spmc_shmem_obj_state object from the provided |
| 162 | * offset. |
| 163 | * %NULL, if there are no more objects. |
| 164 | */ |
| 165 | static struct spmc_shmem_obj * |
| 166 | spmc_shmem_obj_get_next(struct spmc_shmem_obj_state *state, size_t *offset) |
| 167 | { |
| 168 | uint8_t *curr = state->data + *offset; |
| 169 | |
| 170 | if (curr - state->data < state->allocated) { |
| 171 | struct spmc_shmem_obj *obj = (struct spmc_shmem_obj *)curr; |
| 172 | |
| 173 | *offset += spmc_shmem_obj_size(obj->desc_size); |
| 174 | |
| 175 | return obj; |
| 176 | } |
| 177 | return NULL; |
| 178 | } |
| 179 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 180 | /******************************************************************************* |
| 181 | * FF-A memory descriptor helper functions. |
| 182 | ******************************************************************************/ |
| 183 | /** |
| 184 | * spmc_shmem_obj_get_emad - Get the emad from a given index depending on the |
| 185 | * clients FF-A version. |
| 186 | * @desc: The memory transaction descriptor. |
| 187 | * @index: The index of the emad element to be accessed. |
| 188 | * @ffa_version: FF-A version of the provided structure. |
| 189 | * @emad_size: Will be populated with the size of the returned emad |
| 190 | * descriptor. |
| 191 | * Return: A pointer to the requested emad structure. |
| 192 | */ |
| 193 | static void * |
| 194 | spmc_shmem_obj_get_emad(const struct ffa_mtd *desc, uint32_t index, |
| 195 | uint32_t ffa_version, size_t *emad_size) |
| 196 | { |
| 197 | uint8_t *emad; |
| 198 | /* |
| 199 | * If the caller is using FF-A v1.0 interpret the descriptor as a v1.0 |
| 200 | * format, otherwise assume it is a v1.1 format. |
| 201 | */ |
| 202 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 203 | /* Cast our descriptor to the v1.0 format. */ |
| 204 | struct ffa_mtd_v1_0 *mtd_v1_0 = |
| 205 | (struct ffa_mtd_v1_0 *) desc; |
| 206 | emad = (uint8_t *) &(mtd_v1_0->emad); |
| 207 | *emad_size = sizeof(struct ffa_emad_v1_0); |
| 208 | } else { |
| 209 | if (!is_aligned(desc->emad_offset, 16)) { |
| 210 | WARN("Emad offset is not aligned.\n"); |
| 211 | return NULL; |
| 212 | } |
| 213 | emad = ((uint8_t *) desc + desc->emad_offset); |
| 214 | *emad_size = desc->emad_size; |
| 215 | } |
| 216 | return (emad + (*emad_size * index)); |
| 217 | } |
| 218 | |
| 219 | /** |
| 220 | * spmc_shmem_obj_get_comp_mrd - Get comp_mrd from a mtd struct based on the |
| 221 | * FF-A version of the descriptor. |
| 222 | * @obj: Object containing ffa_memory_region_descriptor. |
| 223 | * |
| 224 | * Return: struct ffa_comp_mrd object corresponding to the composite memory |
| 225 | * region descriptor. |
| 226 | */ |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 227 | static struct ffa_comp_mrd * |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 228 | 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] | 229 | { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 230 | size_t emad_size; |
| 231 | /* |
| 232 | * The comp_mrd_offset field of the emad descriptor remains consistent |
| 233 | * between FF-A versions therefore we can use the v1.0 descriptor here |
| 234 | * in all cases. |
| 235 | */ |
| 236 | struct ffa_emad_v1_0 *emad = spmc_shmem_obj_get_emad(&obj->desc, 0, |
| 237 | ffa_version, |
| 238 | &emad_size); |
| 239 | /* Ensure the emad array was found. */ |
| 240 | if (emad == NULL) { |
| 241 | return NULL; |
| 242 | } |
| 243 | |
| 244 | /* Ensure the composite descriptor offset is aligned. */ |
| 245 | if (!is_aligned(emad->comp_mrd_offset, 8)) { |
| 246 | WARN("Unaligned composite memory region descriptor offset.\n"); |
| 247 | return NULL; |
| 248 | } |
| 249 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 250 | return (struct ffa_comp_mrd *) |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 251 | ((uint8_t *)(&obj->desc) + emad->comp_mrd_offset); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | /** |
| 255 | * spmc_shmem_obj_ffa_constituent_size - Calculate variable size part of obj. |
| 256 | * @obj: Object containing ffa_memory_region_descriptor. |
| 257 | * |
| 258 | * Return: Size of ffa_constituent_memory_region_descriptors in @obj. |
| 259 | */ |
| 260 | static size_t |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 261 | spmc_shmem_obj_ffa_constituent_size(struct spmc_shmem_obj *obj, |
| 262 | uint32_t ffa_version) |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 263 | { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 264 | struct ffa_comp_mrd *comp_mrd; |
| 265 | |
| 266 | comp_mrd = spmc_shmem_obj_get_comp_mrd(obj, ffa_version); |
| 267 | if (comp_mrd == NULL) { |
| 268 | return 0; |
| 269 | } |
| 270 | return comp_mrd->address_range_count * sizeof(struct ffa_cons_mrd); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 271 | } |
| 272 | |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 273 | /** |
| 274 | * spmc_shmem_obj_validate_id - Validate a partition ID is participating in |
| 275 | * a given memory transaction. |
| 276 | * @sp_id: Partition ID to validate. |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 277 | * @obj: The shared memory object containing the descriptor |
| 278 | * of the memory transaction. |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 279 | * Return: true if ID is valid, else false. |
| 280 | */ |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 281 | bool spmc_shmem_obj_validate_id(struct spmc_shmem_obj *obj, uint16_t sp_id) |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 282 | { |
| 283 | bool found = false; |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 284 | struct ffa_mtd *desc = &obj->desc; |
| 285 | size_t desc_size = obj->desc_size; |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 286 | |
| 287 | /* Validate the partition is a valid participant. */ |
| 288 | for (unsigned int i = 0U; i < desc->emad_count; i++) { |
| 289 | size_t emad_size; |
| 290 | struct ffa_emad_v1_0 *emad; |
| 291 | |
| 292 | emad = spmc_shmem_obj_get_emad(desc, i, |
| 293 | MAKE_FFA_VERSION(1, 1), |
| 294 | &emad_size); |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 295 | /* |
| 296 | * Validate the calculated emad address resides within the |
| 297 | * descriptor. |
| 298 | */ |
| 299 | if ((emad == NULL) || (uintptr_t) emad >= |
| 300 | (uintptr_t)((uint8_t *) desc + desc_size)) { |
| 301 | VERBOSE("Invalid emad.\n"); |
| 302 | break; |
| 303 | } |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 304 | if (sp_id == emad->mapd.endpoint_id) { |
| 305 | found = true; |
| 306 | break; |
| 307 | } |
| 308 | } |
| 309 | return found; |
| 310 | } |
| 311 | |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 312 | /* |
| 313 | * Compare two memory regions to determine if any range overlaps with another |
| 314 | * ongoing memory transaction. |
| 315 | */ |
| 316 | static bool |
| 317 | overlapping_memory_regions(struct ffa_comp_mrd *region1, |
| 318 | struct ffa_comp_mrd *region2) |
| 319 | { |
| 320 | uint64_t region1_start; |
| 321 | uint64_t region1_size; |
| 322 | uint64_t region1_end; |
| 323 | uint64_t region2_start; |
| 324 | uint64_t region2_size; |
| 325 | uint64_t region2_end; |
| 326 | |
| 327 | assert(region1 != NULL); |
| 328 | assert(region2 != NULL); |
| 329 | |
| 330 | if (region1 == region2) { |
| 331 | return true; |
| 332 | } |
| 333 | |
| 334 | /* |
| 335 | * Check each memory region in the request against existing |
| 336 | * transactions. |
| 337 | */ |
| 338 | for (size_t i = 0; i < region1->address_range_count; i++) { |
| 339 | |
| 340 | region1_start = region1->address_range_array[i].address; |
| 341 | region1_size = |
| 342 | region1->address_range_array[i].page_count * |
| 343 | PAGE_SIZE_4KB; |
| 344 | region1_end = region1_start + region1_size; |
| 345 | |
| 346 | for (size_t j = 0; j < region2->address_range_count; j++) { |
| 347 | |
| 348 | region2_start = region2->address_range_array[j].address; |
| 349 | region2_size = |
| 350 | region2->address_range_array[j].page_count * |
| 351 | PAGE_SIZE_4KB; |
| 352 | region2_end = region2_start + region2_size; |
| 353 | |
Marc Bonnici | 79669bb | 2022-10-18 13:50:04 +0100 | [diff] [blame] | 354 | /* Check if regions are not overlapping. */ |
| 355 | if (!((region2_end <= region1_start) || |
| 356 | (region1_end <= region2_start))) { |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 357 | WARN("Overlapping mem regions 0x%lx-0x%lx & 0x%lx-0x%lx\n", |
| 358 | region1_start, region1_end, |
| 359 | region2_start, region2_end); |
| 360 | return true; |
| 361 | } |
| 362 | } |
| 363 | } |
| 364 | return false; |
| 365 | } |
| 366 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 367 | /******************************************************************************* |
| 368 | * FF-A v1.0 Memory Descriptor Conversion Helpers. |
| 369 | ******************************************************************************/ |
| 370 | /** |
| 371 | * spmc_shm_get_v1_1_descriptor_size - Calculate the required size for a v1.1 |
| 372 | * converted descriptor. |
| 373 | * @orig: The original v1.0 memory transaction descriptor. |
| 374 | * @desc_size: The size of the original v1.0 memory transaction descriptor. |
| 375 | * |
| 376 | * Return: the size required to store the descriptor store in the v1.1 format. |
| 377 | */ |
| 378 | static size_t |
| 379 | spmc_shm_get_v1_1_descriptor_size(struct ffa_mtd_v1_0 *orig, size_t desc_size) |
| 380 | { |
| 381 | size_t size = 0; |
| 382 | struct ffa_comp_mrd *mrd; |
| 383 | struct ffa_emad_v1_0 *emad_array = orig->emad; |
| 384 | |
| 385 | /* Get the size of the v1.1 descriptor. */ |
| 386 | size += sizeof(struct ffa_mtd); |
| 387 | |
| 388 | /* Add the size of the emad descriptors. */ |
| 389 | size += orig->emad_count * sizeof(struct ffa_emad_v1_0); |
| 390 | |
| 391 | /* Add the size of the composite mrds. */ |
| 392 | size += sizeof(struct ffa_comp_mrd); |
| 393 | |
| 394 | /* Add the size of the constituent mrds. */ |
| 395 | mrd = (struct ffa_comp_mrd *) ((uint8_t *) orig + |
| 396 | emad_array[0].comp_mrd_offset); |
| 397 | |
| 398 | /* Check the calculated address is within the memory descriptor. */ |
Marc Bonnici | f744c99 | 2022-10-18 18:01:44 +0100 | [diff] [blame] | 399 | if (((uintptr_t) mrd + sizeof(struct ffa_comp_mrd)) > |
| 400 | (uintptr_t)((uint8_t *) orig + desc_size)) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 401 | return 0; |
| 402 | } |
| 403 | size += mrd->address_range_count * sizeof(struct ffa_cons_mrd); |
| 404 | |
| 405 | return size; |
| 406 | } |
| 407 | |
| 408 | /** |
| 409 | * spmc_shm_get_v1_0_descriptor_size - Calculate the required size for a v1.0 |
| 410 | * converted descriptor. |
| 411 | * @orig: The original v1.1 memory transaction descriptor. |
| 412 | * @desc_size: The size of the original v1.1 memory transaction descriptor. |
| 413 | * |
| 414 | * Return: the size required to store the descriptor store in the v1.0 format. |
| 415 | */ |
| 416 | static size_t |
| 417 | spmc_shm_get_v1_0_descriptor_size(struct ffa_mtd *orig, size_t desc_size) |
| 418 | { |
| 419 | size_t size = 0; |
| 420 | struct ffa_comp_mrd *mrd; |
| 421 | struct ffa_emad_v1_0 *emad_array = (struct ffa_emad_v1_0 *) |
| 422 | ((uint8_t *) orig + |
| 423 | orig->emad_offset); |
| 424 | |
| 425 | /* Get the size of the v1.0 descriptor. */ |
| 426 | size += sizeof(struct ffa_mtd_v1_0); |
| 427 | |
| 428 | /* Add the size of the v1.0 emad descriptors. */ |
| 429 | size += orig->emad_count * sizeof(struct ffa_emad_v1_0); |
| 430 | |
| 431 | /* Add the size of the composite mrds. */ |
| 432 | size += sizeof(struct ffa_comp_mrd); |
| 433 | |
| 434 | /* Add the size of the constituent mrds. */ |
| 435 | mrd = (struct ffa_comp_mrd *) ((uint8_t *) orig + |
| 436 | emad_array[0].comp_mrd_offset); |
| 437 | |
| 438 | /* Check the calculated address is within the memory descriptor. */ |
Marc Bonnici | f744c99 | 2022-10-18 18:01:44 +0100 | [diff] [blame] | 439 | if (((uintptr_t) mrd + sizeof(struct ffa_comp_mrd)) > |
| 440 | (uintptr_t)((uint8_t *) orig + desc_size)) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 441 | return 0; |
| 442 | } |
| 443 | size += mrd->address_range_count * sizeof(struct ffa_cons_mrd); |
| 444 | |
| 445 | return size; |
| 446 | } |
| 447 | |
| 448 | /** |
| 449 | * spmc_shm_convert_shmem_obj_from_v1_0 - Converts a given v1.0 memory object. |
| 450 | * @out_obj: The shared memory object to populate the converted descriptor. |
| 451 | * @orig: The shared memory object containing the v1.0 descriptor. |
| 452 | * |
| 453 | * Return: true if the conversion is successful else false. |
| 454 | */ |
| 455 | static bool |
| 456 | spmc_shm_convert_shmem_obj_from_v1_0(struct spmc_shmem_obj *out_obj, |
| 457 | struct spmc_shmem_obj *orig) |
| 458 | { |
| 459 | struct ffa_mtd_v1_0 *mtd_orig = (struct ffa_mtd_v1_0 *) &orig->desc; |
| 460 | struct ffa_mtd *out = &out_obj->desc; |
| 461 | struct ffa_emad_v1_0 *emad_array_in; |
| 462 | struct ffa_emad_v1_0 *emad_array_out; |
| 463 | struct ffa_comp_mrd *mrd_in; |
| 464 | struct ffa_comp_mrd *mrd_out; |
| 465 | |
| 466 | size_t mrd_in_offset; |
| 467 | size_t mrd_out_offset; |
| 468 | size_t mrd_size = 0; |
| 469 | |
| 470 | /* Populate the new descriptor format from the v1.0 struct. */ |
| 471 | out->sender_id = mtd_orig->sender_id; |
| 472 | out->memory_region_attributes = mtd_orig->memory_region_attributes; |
| 473 | out->flags = mtd_orig->flags; |
| 474 | out->handle = mtd_orig->handle; |
| 475 | out->tag = mtd_orig->tag; |
| 476 | out->emad_count = mtd_orig->emad_count; |
| 477 | out->emad_size = sizeof(struct ffa_emad_v1_0); |
| 478 | |
| 479 | /* |
| 480 | * We will locate the emad descriptors directly after the ffa_mtd |
| 481 | * struct. This will be 8-byte aligned. |
| 482 | */ |
| 483 | out->emad_offset = sizeof(struct ffa_mtd); |
| 484 | |
| 485 | emad_array_in = mtd_orig->emad; |
| 486 | emad_array_out = (struct ffa_emad_v1_0 *) |
| 487 | ((uint8_t *) out + out->emad_offset); |
| 488 | |
| 489 | /* Copy across the emad structs. */ |
| 490 | for (unsigned int i = 0U; i < out->emad_count; i++) { |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 491 | /* Bound check for emad array. */ |
| 492 | if (((uint8_t *)emad_array_in + sizeof(struct ffa_emad_v1_0)) > |
| 493 | ((uint8_t *) mtd_orig + orig->desc_size)) { |
| 494 | VERBOSE("%s: Invalid mtd structure.\n", __func__); |
| 495 | return false; |
| 496 | } |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 497 | memcpy(&emad_array_out[i], &emad_array_in[i], |
| 498 | sizeof(struct ffa_emad_v1_0)); |
| 499 | } |
| 500 | |
| 501 | /* Place the mrd descriptors after the end of the emad descriptors.*/ |
| 502 | mrd_in_offset = emad_array_in->comp_mrd_offset; |
| 503 | mrd_out_offset = out->emad_offset + (out->emad_size * out->emad_count); |
| 504 | mrd_out = (struct ffa_comp_mrd *) ((uint8_t *) out + mrd_out_offset); |
| 505 | |
| 506 | /* Add the size of the composite memory region descriptor. */ |
| 507 | mrd_size += sizeof(struct ffa_comp_mrd); |
| 508 | |
| 509 | /* Find the mrd descriptor. */ |
| 510 | mrd_in = (struct ffa_comp_mrd *) ((uint8_t *) mtd_orig + mrd_in_offset); |
| 511 | |
| 512 | /* Add the size of the constituent memory region descriptors. */ |
| 513 | mrd_size += mrd_in->address_range_count * sizeof(struct ffa_cons_mrd); |
| 514 | |
| 515 | /* |
| 516 | * Update the offset in the emads by the delta between the input and |
| 517 | * output addresses. |
| 518 | */ |
| 519 | for (unsigned int i = 0U; i < out->emad_count; i++) { |
| 520 | emad_array_out[i].comp_mrd_offset = |
| 521 | emad_array_in[i].comp_mrd_offset + |
| 522 | (mrd_out_offset - mrd_in_offset); |
| 523 | } |
| 524 | |
| 525 | /* Verify that we stay within bound of the memory descriptors. */ |
| 526 | if ((uintptr_t)((uint8_t *) mrd_in + mrd_size) > |
| 527 | (uintptr_t)((uint8_t *) mtd_orig + orig->desc_size) || |
| 528 | ((uintptr_t)((uint8_t *) mrd_out + mrd_size) > |
| 529 | (uintptr_t)((uint8_t *) out + out_obj->desc_size))) { |
| 530 | ERROR("%s: Invalid mrd structure.\n", __func__); |
| 531 | return false; |
| 532 | } |
| 533 | |
| 534 | /* Copy the mrd descriptors directly. */ |
| 535 | memcpy(mrd_out, mrd_in, mrd_size); |
| 536 | |
| 537 | return true; |
| 538 | } |
| 539 | |
| 540 | /** |
| 541 | * spmc_shm_convert_mtd_to_v1_0 - Converts a given v1.1 memory object to |
| 542 | * v1.0 memory object. |
| 543 | * @out_obj: The shared memory object to populate the v1.0 descriptor. |
| 544 | * @orig: The shared memory object containing the v1.1 descriptor. |
| 545 | * |
| 546 | * Return: true if the conversion is successful else false. |
| 547 | */ |
| 548 | static bool |
| 549 | spmc_shm_convert_mtd_to_v1_0(struct spmc_shmem_obj *out_obj, |
| 550 | struct spmc_shmem_obj *orig) |
| 551 | { |
| 552 | struct ffa_mtd *mtd_orig = &orig->desc; |
| 553 | struct ffa_mtd_v1_0 *out = (struct ffa_mtd_v1_0 *) &out_obj->desc; |
| 554 | struct ffa_emad_v1_0 *emad_in; |
| 555 | struct ffa_emad_v1_0 *emad_array_in; |
| 556 | struct ffa_emad_v1_0 *emad_array_out; |
| 557 | struct ffa_comp_mrd *mrd_in; |
| 558 | struct ffa_comp_mrd *mrd_out; |
| 559 | |
| 560 | size_t mrd_in_offset; |
| 561 | size_t mrd_out_offset; |
| 562 | size_t emad_out_array_size; |
| 563 | size_t mrd_size = 0; |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 564 | size_t orig_desc_size = orig->desc_size; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 565 | |
| 566 | /* Populate the v1.0 descriptor format from the v1.1 struct. */ |
| 567 | out->sender_id = mtd_orig->sender_id; |
| 568 | out->memory_region_attributes = mtd_orig->memory_region_attributes; |
| 569 | out->flags = mtd_orig->flags; |
| 570 | out->handle = mtd_orig->handle; |
| 571 | out->tag = mtd_orig->tag; |
| 572 | out->emad_count = mtd_orig->emad_count; |
| 573 | |
| 574 | /* Determine the location of the emad array in both descriptors. */ |
| 575 | emad_array_in = (struct ffa_emad_v1_0 *) |
| 576 | ((uint8_t *) mtd_orig + mtd_orig->emad_offset); |
| 577 | emad_array_out = out->emad; |
| 578 | |
| 579 | /* Copy across the emad structs. */ |
| 580 | emad_in = emad_array_in; |
| 581 | for (unsigned int i = 0U; i < out->emad_count; i++) { |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 582 | /* Bound check for emad array. */ |
| 583 | if (((uint8_t *)emad_in + sizeof(struct ffa_emad_v1_0)) > |
| 584 | ((uint8_t *) mtd_orig + orig_desc_size)) { |
| 585 | VERBOSE("%s: Invalid mtd structure.\n", __func__); |
| 586 | return false; |
| 587 | } |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 588 | memcpy(&emad_array_out[i], emad_in, |
| 589 | sizeof(struct ffa_emad_v1_0)); |
| 590 | |
| 591 | emad_in += mtd_orig->emad_size; |
| 592 | } |
| 593 | |
| 594 | /* Place the mrd descriptors after the end of the emad descriptors. */ |
| 595 | emad_out_array_size = sizeof(struct ffa_emad_v1_0) * out->emad_count; |
| 596 | |
| 597 | mrd_out_offset = (uint8_t *) out->emad - (uint8_t *) out + |
| 598 | emad_out_array_size; |
| 599 | |
| 600 | mrd_out = (struct ffa_comp_mrd *) ((uint8_t *) out + mrd_out_offset); |
| 601 | |
| 602 | mrd_in_offset = mtd_orig->emad_offset + |
| 603 | (mtd_orig->emad_size * mtd_orig->emad_count); |
| 604 | |
| 605 | /* Add the size of the composite memory region descriptor. */ |
| 606 | mrd_size += sizeof(struct ffa_comp_mrd); |
| 607 | |
| 608 | /* Find the mrd descriptor. */ |
| 609 | mrd_in = (struct ffa_comp_mrd *) ((uint8_t *) mtd_orig + mrd_in_offset); |
| 610 | |
| 611 | /* Add the size of the constituent memory region descriptors. */ |
| 612 | mrd_size += mrd_in->address_range_count * sizeof(struct ffa_cons_mrd); |
| 613 | |
| 614 | /* |
| 615 | * Update the offset in the emads by the delta between the input and |
| 616 | * output addresses. |
| 617 | */ |
| 618 | emad_in = emad_array_in; |
| 619 | |
| 620 | for (unsigned int i = 0U; i < out->emad_count; i++) { |
| 621 | emad_array_out[i].comp_mrd_offset = emad_in->comp_mrd_offset + |
| 622 | (mrd_out_offset - |
| 623 | mrd_in_offset); |
| 624 | emad_in += mtd_orig->emad_size; |
| 625 | } |
| 626 | |
| 627 | /* Verify that we stay within bound of the memory descriptors. */ |
| 628 | if ((uintptr_t)((uint8_t *) mrd_in + mrd_size) > |
| 629 | (uintptr_t)((uint8_t *) mtd_orig + orig->desc_size) || |
| 630 | ((uintptr_t)((uint8_t *) mrd_out + mrd_size) > |
| 631 | (uintptr_t)((uint8_t *) out + out_obj->desc_size))) { |
| 632 | ERROR("%s: Invalid mrd structure.\n", __func__); |
| 633 | return false; |
| 634 | } |
| 635 | |
| 636 | /* Copy the mrd descriptors directly. */ |
| 637 | memcpy(mrd_out, mrd_in, mrd_size); |
| 638 | |
| 639 | return true; |
| 640 | } |
| 641 | |
| 642 | /** |
| 643 | * spmc_populate_ffa_v1_0_descriptor - Converts a given v1.1 memory object to |
| 644 | * the v1.0 format and populates the |
| 645 | * provided buffer. |
| 646 | * @dst: Buffer to populate v1.0 ffa_memory_region_descriptor. |
| 647 | * @orig_obj: Object containing v1.1 ffa_memory_region_descriptor. |
| 648 | * @buf_size: Size of the buffer to populate. |
| 649 | * @offset: The offset of the converted descriptor to copy. |
| 650 | * @copy_size: Will be populated with the number of bytes copied. |
| 651 | * @out_desc_size: Will be populated with the total size of the v1.0 |
| 652 | * descriptor. |
| 653 | * |
| 654 | * Return: 0 if conversion and population succeeded. |
| 655 | * Note: This function invalidates the reference to @orig therefore |
| 656 | * `spmc_shmem_obj_lookup` must be called if further usage is required. |
| 657 | */ |
| 658 | static uint32_t |
| 659 | spmc_populate_ffa_v1_0_descriptor(void *dst, struct spmc_shmem_obj *orig_obj, |
| 660 | size_t buf_size, size_t offset, |
| 661 | size_t *copy_size, size_t *v1_0_desc_size) |
| 662 | { |
| 663 | struct spmc_shmem_obj *v1_0_obj; |
| 664 | |
| 665 | /* Calculate the size that the v1.0 descriptor will require. */ |
| 666 | *v1_0_desc_size = spmc_shm_get_v1_0_descriptor_size( |
| 667 | &orig_obj->desc, orig_obj->desc_size); |
| 668 | |
| 669 | if (*v1_0_desc_size == 0) { |
| 670 | ERROR("%s: cannot determine size of descriptor.\n", |
| 671 | __func__); |
| 672 | return FFA_ERROR_INVALID_PARAMETER; |
| 673 | } |
| 674 | |
| 675 | /* Get a new obj to store the v1.0 descriptor. */ |
| 676 | v1_0_obj = spmc_shmem_obj_alloc(&spmc_shmem_obj_state, |
| 677 | *v1_0_desc_size); |
| 678 | |
| 679 | if (!v1_0_obj) { |
| 680 | return FFA_ERROR_NO_MEMORY; |
| 681 | } |
| 682 | |
| 683 | /* Perform the conversion from v1.1 to v1.0. */ |
| 684 | if (!spmc_shm_convert_mtd_to_v1_0(v1_0_obj, orig_obj)) { |
| 685 | spmc_shmem_obj_free(&spmc_shmem_obj_state, v1_0_obj); |
| 686 | return FFA_ERROR_INVALID_PARAMETER; |
| 687 | } |
| 688 | |
| 689 | *copy_size = MIN(v1_0_obj->desc_size - offset, buf_size); |
| 690 | memcpy(dst, (uint8_t *) &v1_0_obj->desc + offset, *copy_size); |
| 691 | |
| 692 | /* |
| 693 | * We're finished with the v1.0 descriptor for now so free it. |
| 694 | * Note that this will invalidate any references to the v1.1 |
| 695 | * descriptor. |
| 696 | */ |
| 697 | spmc_shmem_obj_free(&spmc_shmem_obj_state, v1_0_obj); |
| 698 | |
| 699 | return 0; |
| 700 | } |
| 701 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 702 | /** |
| 703 | * spmc_shmem_check_obj - Check that counts in descriptor match overall size. |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 704 | * @obj: Object containing ffa_memory_region_descriptor. |
| 705 | * @ffa_version: FF-A version of the provided descriptor. |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 706 | * |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 707 | * Return: 0 if object is valid, -EINVAL if constituent_memory_region_descriptor |
| 708 | * offset or count is invalid. |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 709 | */ |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 710 | static int spmc_shmem_check_obj(struct spmc_shmem_obj *obj, |
| 711 | uint32_t ffa_version) |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 712 | { |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 713 | uint32_t comp_mrd_offset = 0; |
| 714 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 715 | if (obj->desc.emad_count == 0U) { |
| 716 | WARN("%s: unsupported attribute desc count %u.\n", |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 717 | __func__, obj->desc.emad_count); |
| 718 | return -EINVAL; |
| 719 | } |
| 720 | |
| 721 | for (size_t emad_num = 0; emad_num < obj->desc.emad_count; emad_num++) { |
| 722 | size_t size; |
| 723 | size_t count; |
| 724 | size_t expected_size; |
| 725 | size_t total_page_count; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 726 | size_t emad_size; |
| 727 | size_t desc_size; |
| 728 | size_t header_emad_size; |
| 729 | uint32_t offset; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 730 | struct ffa_comp_mrd *comp; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 731 | struct ffa_emad_v1_0 *emad; |
| 732 | |
| 733 | emad = spmc_shmem_obj_get_emad(&obj->desc, emad_num, |
| 734 | ffa_version, &emad_size); |
| 735 | if (emad == NULL) { |
| 736 | WARN("%s: invalid emad structure.\n", __func__); |
| 737 | return -EINVAL; |
| 738 | } |
| 739 | |
| 740 | /* |
| 741 | * Validate the calculated emad address resides within the |
| 742 | * descriptor. |
| 743 | */ |
| 744 | if ((uintptr_t) emad >= |
| 745 | (uintptr_t)((uint8_t *) &obj->desc + obj->desc_size)) { |
| 746 | WARN("Invalid emad access.\n"); |
| 747 | return -EINVAL; |
| 748 | } |
| 749 | |
| 750 | offset = emad->comp_mrd_offset; |
| 751 | |
| 752 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 753 | desc_size = sizeof(struct ffa_mtd_v1_0); |
| 754 | } else { |
| 755 | desc_size = sizeof(struct ffa_mtd); |
| 756 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 757 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 758 | header_emad_size = desc_size + |
| 759 | (obj->desc.emad_count * emad_size); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 760 | |
| 761 | if (offset < header_emad_size) { |
| 762 | WARN("%s: invalid object, offset %u < header + emad %zu\n", |
| 763 | __func__, offset, header_emad_size); |
| 764 | return -EINVAL; |
| 765 | } |
| 766 | |
| 767 | size = obj->desc_size; |
| 768 | |
| 769 | if (offset > size) { |
| 770 | WARN("%s: invalid object, offset %u > total size %zu\n", |
| 771 | __func__, offset, obj->desc_size); |
| 772 | return -EINVAL; |
| 773 | } |
| 774 | size -= offset; |
| 775 | |
| 776 | if (size < sizeof(struct ffa_comp_mrd)) { |
| 777 | WARN("%s: invalid object, offset %u, total size %zu, no header space.\n", |
| 778 | __func__, offset, obj->desc_size); |
| 779 | return -EINVAL; |
| 780 | } |
| 781 | size -= sizeof(struct ffa_comp_mrd); |
| 782 | |
| 783 | count = size / sizeof(struct ffa_cons_mrd); |
| 784 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 785 | comp = spmc_shmem_obj_get_comp_mrd(obj, ffa_version); |
| 786 | |
| 787 | if (comp == NULL) { |
| 788 | WARN("%s: invalid comp_mrd offset\n", __func__); |
| 789 | return -EINVAL; |
| 790 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 791 | |
| 792 | if (comp->address_range_count != count) { |
| 793 | WARN("%s: invalid object, desc count %u != %zu\n", |
| 794 | __func__, comp->address_range_count, count); |
| 795 | return -EINVAL; |
| 796 | } |
| 797 | |
| 798 | expected_size = offset + sizeof(*comp) + |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 799 | spmc_shmem_obj_ffa_constituent_size(obj, |
| 800 | ffa_version); |
| 801 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 802 | if (expected_size != obj->desc_size) { |
| 803 | WARN("%s: invalid object, computed size %zu != size %zu\n", |
| 804 | __func__, expected_size, obj->desc_size); |
| 805 | return -EINVAL; |
| 806 | } |
| 807 | |
| 808 | if (obj->desc_filled < obj->desc_size) { |
| 809 | /* |
| 810 | * The whole descriptor has not yet been received. |
| 811 | * Skip final checks. |
| 812 | */ |
| 813 | return 0; |
| 814 | } |
| 815 | |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 816 | /* |
| 817 | * The offset provided to the composite memory region descriptor |
| 818 | * should be consistent across endpoint descriptors. Store the |
| 819 | * first entry and compare against subsequent entries. |
| 820 | */ |
| 821 | if (comp_mrd_offset == 0) { |
| 822 | comp_mrd_offset = offset; |
| 823 | } else { |
| 824 | if (comp_mrd_offset != offset) { |
| 825 | ERROR("%s: mismatching offsets provided, %u != %u\n", |
| 826 | __func__, offset, comp_mrd_offset); |
| 827 | return -EINVAL; |
| 828 | } |
| 829 | } |
| 830 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 831 | total_page_count = 0; |
| 832 | |
| 833 | for (size_t i = 0; i < count; i++) { |
| 834 | total_page_count += |
| 835 | comp->address_range_array[i].page_count; |
| 836 | } |
| 837 | if (comp->total_page_count != total_page_count) { |
| 838 | WARN("%s: invalid object, desc total_page_count %u != %zu\n", |
| 839 | __func__, comp->total_page_count, |
| 840 | total_page_count); |
| 841 | return -EINVAL; |
| 842 | } |
| 843 | } |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 844 | return 0; |
| 845 | } |
| 846 | |
| 847 | /** |
| 848 | * spmc_shmem_check_state_obj - Check if the descriptor describes memory |
| 849 | * regions that are currently involved with an |
| 850 | * existing memory transactions. This implies that |
| 851 | * the memory is not in a valid state for lending. |
| 852 | * @obj: Object containing ffa_memory_region_descriptor. |
| 853 | * |
| 854 | * Return: 0 if object is valid, -EINVAL if invalid memory state. |
| 855 | */ |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 856 | static int spmc_shmem_check_state_obj(struct spmc_shmem_obj *obj, |
| 857 | uint32_t ffa_version) |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 858 | { |
| 859 | size_t obj_offset = 0; |
| 860 | struct spmc_shmem_obj *inflight_obj; |
| 861 | |
| 862 | struct ffa_comp_mrd *other_mrd; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 863 | struct ffa_comp_mrd *requested_mrd = spmc_shmem_obj_get_comp_mrd(obj, |
| 864 | ffa_version); |
| 865 | |
| 866 | if (requested_mrd == NULL) { |
| 867 | return -EINVAL; |
| 868 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 869 | |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 870 | inflight_obj = spmc_shmem_obj_get_next(&spmc_shmem_obj_state, |
| 871 | &obj_offset); |
| 872 | |
| 873 | while (inflight_obj != NULL) { |
| 874 | /* |
| 875 | * Don't compare the transaction to itself or to partially |
| 876 | * transmitted descriptors. |
| 877 | */ |
| 878 | if ((obj->desc.handle != inflight_obj->desc.handle) && |
| 879 | (obj->desc_size == obj->desc_filled)) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 880 | other_mrd = spmc_shmem_obj_get_comp_mrd(inflight_obj, |
Marc Bonnici | 344ca9d | 2022-05-20 14:38:55 +0100 | [diff] [blame] | 881 | FFA_VERSION_COMPILED); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 882 | if (other_mrd == NULL) { |
| 883 | return -EINVAL; |
| 884 | } |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 885 | if (overlapping_memory_regions(requested_mrd, |
| 886 | other_mrd)) { |
| 887 | return -EINVAL; |
| 888 | } |
| 889 | } |
| 890 | |
| 891 | inflight_obj = spmc_shmem_obj_get_next(&spmc_shmem_obj_state, |
| 892 | &obj_offset); |
| 893 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 894 | return 0; |
| 895 | } |
| 896 | |
| 897 | static long spmc_ffa_fill_desc(struct mailbox *mbox, |
| 898 | struct spmc_shmem_obj *obj, |
| 899 | uint32_t fragment_length, |
| 900 | ffa_mtd_flag32_t mtd_flag, |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 901 | uint32_t ffa_version, |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 902 | void *smc_handle) |
| 903 | { |
| 904 | int ret; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 905 | size_t emad_size; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 906 | uint32_t handle_low; |
| 907 | uint32_t handle_high; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 908 | struct ffa_emad_v1_0 *emad; |
| 909 | struct ffa_emad_v1_0 *other_emad; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 910 | |
| 911 | if (mbox->rxtx_page_count == 0U) { |
| 912 | WARN("%s: buffer pair not registered.\n", __func__); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 913 | ret = FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 914 | goto err_arg; |
| 915 | } |
| 916 | |
| 917 | if (fragment_length > mbox->rxtx_page_count * PAGE_SIZE_4KB) { |
| 918 | WARN("%s: bad fragment size %u > %u buffer size\n", __func__, |
| 919 | fragment_length, mbox->rxtx_page_count * PAGE_SIZE_4KB); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 920 | ret = FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 921 | goto err_arg; |
| 922 | } |
| 923 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 924 | if (fragment_length > obj->desc_size - obj->desc_filled) { |
| 925 | WARN("%s: bad fragment size %u > %zu remaining\n", __func__, |
| 926 | fragment_length, obj->desc_size - obj->desc_filled); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 927 | ret = FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 928 | goto err_arg; |
| 929 | } |
| 930 | |
Marc Bonnici | f0f45dc | 2022-10-18 13:57:16 +0100 | [diff] [blame] | 931 | memcpy((uint8_t *)&obj->desc + obj->desc_filled, |
| 932 | (uint8_t *) mbox->tx_buffer, fragment_length); |
| 933 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 934 | /* Ensure that the sender ID resides in the normal world. */ |
| 935 | if (ffa_is_secure_world_id(obj->desc.sender_id)) { |
| 936 | WARN("%s: Invalid sender ID 0x%x.\n", |
| 937 | __func__, obj->desc.sender_id); |
| 938 | ret = FFA_ERROR_DENIED; |
| 939 | goto err_arg; |
| 940 | } |
| 941 | |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 942 | /* Ensure the NS bit is set to 0. */ |
| 943 | if ((obj->desc.memory_region_attributes & FFA_MEM_ATTR_NS_BIT) != 0U) { |
| 944 | WARN("%s: NS mem attributes flags MBZ.\n", __func__); |
| 945 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 946 | goto err_arg; |
| 947 | } |
| 948 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 949 | /* |
| 950 | * We don't currently support any optional flags so ensure none are |
| 951 | * requested. |
| 952 | */ |
| 953 | if (obj->desc.flags != 0U && mtd_flag != 0U && |
| 954 | (obj->desc.flags != mtd_flag)) { |
| 955 | WARN("%s: invalid memory transaction flags %u != %u\n", |
| 956 | __func__, obj->desc.flags, mtd_flag); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 957 | ret = FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 958 | goto err_arg; |
| 959 | } |
| 960 | |
| 961 | if (obj->desc_filled == 0U) { |
| 962 | /* First fragment, descriptor header has been copied */ |
| 963 | obj->desc.handle = spmc_shmem_obj_state.next_handle++; |
| 964 | obj->desc.flags |= mtd_flag; |
| 965 | } |
| 966 | |
| 967 | obj->desc_filled += fragment_length; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 968 | ret = spmc_shmem_check_obj(obj, ffa_version); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 969 | if (ret != 0) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 970 | ret = FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 971 | goto err_bad_desc; |
| 972 | } |
| 973 | |
| 974 | handle_low = (uint32_t)obj->desc.handle; |
| 975 | handle_high = obj->desc.handle >> 32; |
| 976 | |
| 977 | if (obj->desc_filled != obj->desc_size) { |
| 978 | SMC_RET8(smc_handle, FFA_MEM_FRAG_RX, handle_low, |
| 979 | handle_high, obj->desc_filled, |
| 980 | (uint32_t)obj->desc.sender_id << 16, 0, 0, 0); |
| 981 | } |
| 982 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 983 | /* The full descriptor has been received, perform any final checks. */ |
| 984 | |
| 985 | /* |
| 986 | * If a partition ID resides in the secure world validate that the |
| 987 | * partition ID is for a known partition. Ignore any partition ID |
| 988 | * belonging to the normal world as it is assumed the Hypervisor will |
| 989 | * have validated these. |
| 990 | */ |
| 991 | for (size_t i = 0; i < obj->desc.emad_count; i++) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 992 | emad = spmc_shmem_obj_get_emad(&obj->desc, i, ffa_version, |
| 993 | &emad_size); |
| 994 | if (emad == NULL) { |
| 995 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 996 | goto err_bad_desc; |
| 997 | } |
| 998 | |
| 999 | ffa_endpoint_id16_t ep_id = emad->mapd.endpoint_id; |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1000 | |
| 1001 | if (ffa_is_secure_world_id(ep_id)) { |
| 1002 | if (spmc_get_sp_ctx(ep_id) == NULL) { |
| 1003 | WARN("%s: Invalid receiver id 0x%x\n", |
| 1004 | __func__, ep_id); |
| 1005 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1006 | goto err_bad_desc; |
| 1007 | } |
| 1008 | } |
| 1009 | } |
| 1010 | |
| 1011 | /* Ensure partition IDs are not duplicated. */ |
| 1012 | for (size_t i = 0; i < obj->desc.emad_count; i++) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1013 | emad = spmc_shmem_obj_get_emad(&obj->desc, i, ffa_version, |
| 1014 | &emad_size); |
| 1015 | if (emad == NULL) { |
| 1016 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1017 | goto err_bad_desc; |
| 1018 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1019 | for (size_t j = i + 1; j < obj->desc.emad_count; j++) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1020 | other_emad = spmc_shmem_obj_get_emad(&obj->desc, j, |
| 1021 | ffa_version, |
| 1022 | &emad_size); |
| 1023 | if (other_emad == NULL) { |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1024 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1025 | goto err_bad_desc; |
| 1026 | } |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1027 | |
| 1028 | if (emad->mapd.endpoint_id == |
| 1029 | other_emad->mapd.endpoint_id) { |
| 1030 | WARN("%s: Duplicated endpoint id 0x%x\n", |
| 1031 | __func__, emad->mapd.endpoint_id); |
| 1032 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1033 | goto err_bad_desc; |
| 1034 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1035 | } |
| 1036 | } |
| 1037 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1038 | ret = spmc_shmem_check_state_obj(obj, ffa_version); |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 1039 | if (ret) { |
| 1040 | ERROR("%s: invalid memory region descriptor.\n", __func__); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1041 | ret = FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 1042 | goto err_bad_desc; |
| 1043 | } |
| 1044 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1045 | /* |
| 1046 | * Everything checks out, if the sender was using FF-A v1.0, convert |
| 1047 | * the descriptor format to use the v1.1 structures. |
| 1048 | */ |
| 1049 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 1050 | struct spmc_shmem_obj *v1_1_obj; |
| 1051 | uint64_t mem_handle; |
| 1052 | |
| 1053 | /* Calculate the size that the v1.1 descriptor will required. */ |
| 1054 | size_t v1_1_desc_size = |
| 1055 | spmc_shm_get_v1_1_descriptor_size((void *) &obj->desc, |
vallau01 | 46dbac2 | 2022-08-08 14:10:14 +0200 | [diff] [blame] | 1056 | obj->desc_size); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1057 | |
| 1058 | if (v1_1_desc_size == 0U) { |
| 1059 | ERROR("%s: cannot determine size of descriptor.\n", |
| 1060 | __func__); |
| 1061 | goto err_arg; |
| 1062 | } |
| 1063 | |
| 1064 | /* Get a new obj to store the v1.1 descriptor. */ |
| 1065 | v1_1_obj = |
| 1066 | spmc_shmem_obj_alloc(&spmc_shmem_obj_state, v1_1_desc_size); |
| 1067 | |
vallau01 | 8f83099 | 2022-08-09 18:03:28 +0200 | [diff] [blame] | 1068 | if (!v1_1_obj) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1069 | ret = FFA_ERROR_NO_MEMORY; |
| 1070 | goto err_arg; |
| 1071 | } |
| 1072 | |
| 1073 | /* Perform the conversion from v1.0 to v1.1. */ |
| 1074 | v1_1_obj->desc_size = v1_1_desc_size; |
| 1075 | v1_1_obj->desc_filled = v1_1_desc_size; |
| 1076 | if (!spmc_shm_convert_shmem_obj_from_v1_0(v1_1_obj, obj)) { |
| 1077 | ERROR("%s: Could not convert mtd!\n", __func__); |
| 1078 | spmc_shmem_obj_free(&spmc_shmem_obj_state, v1_1_obj); |
| 1079 | goto err_arg; |
| 1080 | } |
| 1081 | |
| 1082 | /* |
| 1083 | * We're finished with the v1.0 descriptor so free it |
| 1084 | * and continue our checks with the new v1.1 descriptor. |
| 1085 | */ |
| 1086 | mem_handle = obj->desc.handle; |
| 1087 | spmc_shmem_obj_free(&spmc_shmem_obj_state, obj); |
| 1088 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| 1089 | if (obj == NULL) { |
| 1090 | ERROR("%s: Failed to find converted descriptor.\n", |
| 1091 | __func__); |
| 1092 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1093 | return spmc_ffa_error_return(smc_handle, ret); |
| 1094 | } |
| 1095 | } |
| 1096 | |
Marc Bonnici | 503320e | 2022-02-21 15:02:36 +0000 | [diff] [blame] | 1097 | /* Allow for platform specific operations to be performed. */ |
| 1098 | ret = plat_spmc_shmem_begin(&obj->desc); |
| 1099 | if (ret != 0) { |
| 1100 | goto err_arg; |
| 1101 | } |
| 1102 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1103 | SMC_RET8(smc_handle, FFA_SUCCESS_SMC32, 0, handle_low, handle_high, 0, |
| 1104 | 0, 0, 0); |
| 1105 | |
| 1106 | err_bad_desc: |
| 1107 | err_arg: |
| 1108 | spmc_shmem_obj_free(&spmc_shmem_obj_state, obj); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1109 | return spmc_ffa_error_return(smc_handle, ret); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1110 | } |
| 1111 | |
| 1112 | /** |
| 1113 | * spmc_ffa_mem_send - FFA_MEM_SHARE/LEND implementation. |
| 1114 | * @client: Client state. |
| 1115 | * @total_length: Total length of shared memory descriptor. |
| 1116 | * @fragment_length: Length of fragment of shared memory descriptor passed in |
| 1117 | * this call. |
| 1118 | * @address: Not supported, must be 0. |
| 1119 | * @page_count: Not supported, must be 0. |
| 1120 | * @smc_handle: Handle passed to smc call. Used to return |
| 1121 | * FFA_MEM_FRAG_RX or SMC_FC_FFA_SUCCESS. |
| 1122 | * |
| 1123 | * Implements a subset of the FF-A FFA_MEM_SHARE and FFA_MEM_LEND calls needed |
| 1124 | * to share or lend memory from non-secure os to secure os (with no stream |
| 1125 | * endpoints). |
| 1126 | * |
| 1127 | * Return: 0 on success, error code on failure. |
| 1128 | */ |
| 1129 | long spmc_ffa_mem_send(uint32_t smc_fid, |
| 1130 | bool secure_origin, |
| 1131 | uint64_t total_length, |
| 1132 | uint32_t fragment_length, |
| 1133 | uint64_t address, |
| 1134 | uint32_t page_count, |
| 1135 | void *cookie, |
| 1136 | void *handle, |
| 1137 | uint64_t flags) |
| 1138 | |
| 1139 | { |
| 1140 | long ret; |
| 1141 | struct spmc_shmem_obj *obj; |
| 1142 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 1143 | ffa_mtd_flag32_t mtd_flag; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1144 | uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1145 | |
| 1146 | if (address != 0U || page_count != 0U) { |
| 1147 | WARN("%s: custom memory region for message not supported.\n", |
| 1148 | __func__); |
| 1149 | return spmc_ffa_error_return(handle, |
| 1150 | FFA_ERROR_INVALID_PARAMETER); |
| 1151 | } |
| 1152 | |
| 1153 | if (secure_origin) { |
| 1154 | WARN("%s: unsupported share direction.\n", __func__); |
| 1155 | return spmc_ffa_error_return(handle, |
| 1156 | FFA_ERROR_INVALID_PARAMETER); |
| 1157 | } |
| 1158 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1159 | /* |
| 1160 | * Check if the descriptor is smaller than the v1.0 descriptor. The |
| 1161 | * descriptor cannot be smaller than this structure. |
| 1162 | */ |
| 1163 | if (fragment_length < sizeof(struct ffa_mtd_v1_0)) { |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1164 | WARN("%s: bad first fragment size %u < %zu\n", |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1165 | __func__, fragment_length, sizeof(struct ffa_mtd_v1_0)); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1166 | return spmc_ffa_error_return(handle, |
| 1167 | FFA_ERROR_INVALID_PARAMETER); |
| 1168 | } |
| 1169 | |
| 1170 | if ((smc_fid & FUNCID_NUM_MASK) == FFA_FNUM_MEM_SHARE) { |
| 1171 | mtd_flag = FFA_MTD_FLAG_TYPE_SHARE_MEMORY; |
| 1172 | } else if ((smc_fid & FUNCID_NUM_MASK) == FFA_FNUM_MEM_LEND) { |
| 1173 | mtd_flag = FFA_MTD_FLAG_TYPE_LEND_MEMORY; |
| 1174 | } else { |
| 1175 | WARN("%s: invalid memory management operation.\n", __func__); |
| 1176 | return spmc_ffa_error_return(handle, |
| 1177 | FFA_ERROR_INVALID_PARAMETER); |
| 1178 | } |
| 1179 | |
| 1180 | spin_lock(&spmc_shmem_obj_state.lock); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1181 | obj = spmc_shmem_obj_alloc(&spmc_shmem_obj_state, total_length); |
| 1182 | if (obj == NULL) { |
| 1183 | ret = FFA_ERROR_NO_MEMORY; |
| 1184 | goto err_unlock; |
| 1185 | } |
| 1186 | |
| 1187 | spin_lock(&mbox->lock); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1188 | ret = spmc_ffa_fill_desc(mbox, obj, fragment_length, mtd_flag, |
| 1189 | ffa_version, handle); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1190 | spin_unlock(&mbox->lock); |
| 1191 | |
| 1192 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1193 | return ret; |
| 1194 | |
| 1195 | err_unlock: |
| 1196 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1197 | return spmc_ffa_error_return(handle, ret); |
| 1198 | } |
| 1199 | |
| 1200 | /** |
| 1201 | * spmc_ffa_mem_frag_tx - FFA_MEM_FRAG_TX implementation. |
| 1202 | * @client: Client state. |
| 1203 | * @handle_low: Handle_low value returned from FFA_MEM_FRAG_RX. |
| 1204 | * @handle_high: Handle_high value returned from FFA_MEM_FRAG_RX. |
| 1205 | * @fragment_length: Length of fragments transmitted. |
| 1206 | * @sender_id: Vmid of sender in bits [31:16] |
| 1207 | * @smc_handle: Handle passed to smc call. Used to return |
| 1208 | * FFA_MEM_FRAG_RX or SMC_FC_FFA_SUCCESS. |
| 1209 | * |
| 1210 | * Return: @smc_handle on success, error code on failure. |
| 1211 | */ |
| 1212 | long spmc_ffa_mem_frag_tx(uint32_t smc_fid, |
| 1213 | bool secure_origin, |
| 1214 | uint64_t handle_low, |
| 1215 | uint64_t handle_high, |
| 1216 | uint32_t fragment_length, |
| 1217 | uint32_t sender_id, |
| 1218 | void *cookie, |
| 1219 | void *handle, |
| 1220 | uint64_t flags) |
| 1221 | { |
| 1222 | long ret; |
| 1223 | uint32_t desc_sender_id; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1224 | uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1225 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 1226 | |
| 1227 | struct spmc_shmem_obj *obj; |
| 1228 | uint64_t mem_handle = handle_low | (((uint64_t)handle_high) << 32); |
| 1229 | |
| 1230 | spin_lock(&spmc_shmem_obj_state.lock); |
| 1231 | |
| 1232 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| 1233 | if (obj == NULL) { |
| 1234 | WARN("%s: invalid handle, 0x%lx, not a valid handle.\n", |
| 1235 | __func__, mem_handle); |
| 1236 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1237 | goto err_unlock; |
| 1238 | } |
| 1239 | |
| 1240 | desc_sender_id = (uint32_t)obj->desc.sender_id << 16; |
| 1241 | if (sender_id != desc_sender_id) { |
| 1242 | WARN("%s: invalid sender_id 0x%x != 0x%x\n", __func__, |
| 1243 | sender_id, desc_sender_id); |
| 1244 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1245 | goto err_unlock; |
| 1246 | } |
| 1247 | |
| 1248 | if (obj->desc_filled == obj->desc_size) { |
| 1249 | WARN("%s: object desc already filled, %zu\n", __func__, |
| 1250 | obj->desc_filled); |
| 1251 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1252 | goto err_unlock; |
| 1253 | } |
| 1254 | |
| 1255 | spin_lock(&mbox->lock); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1256 | ret = spmc_ffa_fill_desc(mbox, obj, fragment_length, 0, ffa_version, |
| 1257 | handle); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1258 | spin_unlock(&mbox->lock); |
| 1259 | |
| 1260 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1261 | return ret; |
| 1262 | |
| 1263 | err_unlock: |
| 1264 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1265 | return spmc_ffa_error_return(handle, ret); |
| 1266 | } |
| 1267 | |
| 1268 | /** |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1269 | * spmc_ffa_mem_retrieve_set_ns_bit - Set the NS bit in the response descriptor |
| 1270 | * if the caller implements a version greater |
| 1271 | * than FF-A 1.0 or if they have requested |
| 1272 | * the functionality. |
| 1273 | * TODO: We are assuming that the caller is |
| 1274 | * an SP. To support retrieval from the |
| 1275 | * normal world this function will need to be |
| 1276 | * expanded accordingly. |
| 1277 | * @resp: Descriptor populated in callers RX buffer. |
| 1278 | * @sp_ctx: Context of the calling SP. |
| 1279 | */ |
| 1280 | void spmc_ffa_mem_retrieve_set_ns_bit(struct ffa_mtd *resp, |
| 1281 | struct secure_partition_desc *sp_ctx) |
| 1282 | { |
| 1283 | if (sp_ctx->ffa_version > MAKE_FFA_VERSION(1, 0) || |
| 1284 | sp_ctx->ns_bit_requested) { |
| 1285 | /* |
| 1286 | * Currently memory senders must reside in the normal |
| 1287 | * world, and we do not have the functionlaity to change |
| 1288 | * the state of memory dynamically. Therefore we can always set |
| 1289 | * the NS bit to 1. |
| 1290 | */ |
| 1291 | resp->memory_region_attributes |= FFA_MEM_ATTR_NS_BIT; |
| 1292 | } |
| 1293 | } |
| 1294 | |
| 1295 | /** |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1296 | * spmc_ffa_mem_retrieve_req - FFA_MEM_RETRIEVE_REQ implementation. |
| 1297 | * @smc_fid: FID of SMC |
| 1298 | * @total_length: Total length of retrieve request descriptor if this is |
| 1299 | * the first call. Otherwise (unsupported) must be 0. |
| 1300 | * @fragment_length: Length of fragment of retrieve request descriptor passed |
| 1301 | * in this call. Only @fragment_length == @length is |
| 1302 | * supported by this implementation. |
| 1303 | * @address: Not supported, must be 0. |
| 1304 | * @page_count: Not supported, must be 0. |
| 1305 | * @smc_handle: Handle passed to smc call. Used to return |
| 1306 | * FFA_MEM_RETRIEVE_RESP. |
| 1307 | * |
| 1308 | * Implements a subset of the FF-A FFA_MEM_RETRIEVE_REQ call. |
| 1309 | * Used by secure os to retrieve memory already shared by non-secure os. |
| 1310 | * If the data does not fit in a single FFA_MEM_RETRIEVE_RESP message, |
| 1311 | * the client must call FFA_MEM_FRAG_RX until the full response has been |
| 1312 | * received. |
| 1313 | * |
| 1314 | * Return: @handle on success, error code on failure. |
| 1315 | */ |
| 1316 | long |
| 1317 | spmc_ffa_mem_retrieve_req(uint32_t smc_fid, |
| 1318 | bool secure_origin, |
| 1319 | uint32_t total_length, |
| 1320 | uint32_t fragment_length, |
| 1321 | uint64_t address, |
| 1322 | uint32_t page_count, |
| 1323 | void *cookie, |
| 1324 | void *handle, |
| 1325 | uint64_t flags) |
| 1326 | { |
| 1327 | int ret; |
| 1328 | size_t buf_size; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1329 | size_t copy_size = 0; |
| 1330 | size_t min_desc_size; |
| 1331 | size_t out_desc_size = 0; |
| 1332 | |
| 1333 | /* |
| 1334 | * Currently we are only accessing fields that are the same in both the |
| 1335 | * v1.0 and v1.1 mtd struct therefore we can use a v1.1 struct directly |
| 1336 | * here. We only need validate against the appropriate struct size. |
| 1337 | */ |
| 1338 | struct ffa_mtd *resp; |
| 1339 | const struct ffa_mtd *req; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1340 | struct spmc_shmem_obj *obj = NULL; |
| 1341 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1342 | uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1343 | struct secure_partition_desc *sp_ctx = spmc_get_current_sp_ctx(); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1344 | |
| 1345 | if (!secure_origin) { |
| 1346 | WARN("%s: unsupported retrieve req direction.\n", __func__); |
| 1347 | return spmc_ffa_error_return(handle, |
| 1348 | FFA_ERROR_INVALID_PARAMETER); |
| 1349 | } |
| 1350 | |
| 1351 | if (address != 0U || page_count != 0U) { |
| 1352 | WARN("%s: custom memory region not supported.\n", __func__); |
| 1353 | return spmc_ffa_error_return(handle, |
| 1354 | FFA_ERROR_INVALID_PARAMETER); |
| 1355 | } |
| 1356 | |
| 1357 | spin_lock(&mbox->lock); |
| 1358 | |
| 1359 | req = mbox->tx_buffer; |
| 1360 | resp = mbox->rx_buffer; |
| 1361 | buf_size = mbox->rxtx_page_count * FFA_PAGE_SIZE; |
| 1362 | |
| 1363 | if (mbox->rxtx_page_count == 0U) { |
| 1364 | WARN("%s: buffer pair not registered.\n", __func__); |
| 1365 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1366 | goto err_unlock_mailbox; |
| 1367 | } |
| 1368 | |
| 1369 | if (mbox->state != MAILBOX_STATE_EMPTY) { |
| 1370 | WARN("%s: RX Buffer is full! %d\n", __func__, mbox->state); |
| 1371 | ret = FFA_ERROR_DENIED; |
| 1372 | goto err_unlock_mailbox; |
| 1373 | } |
| 1374 | |
| 1375 | if (fragment_length != total_length) { |
| 1376 | WARN("%s: fragmented retrieve request not supported.\n", |
| 1377 | __func__); |
| 1378 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1379 | goto err_unlock_mailbox; |
| 1380 | } |
| 1381 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1382 | if (req->emad_count == 0U) { |
| 1383 | WARN("%s: unsupported attribute desc count %u.\n", |
| 1384 | __func__, obj->desc.emad_count); |
vallau01 | 460d396 | 2022-08-09 17:06:53 +0200 | [diff] [blame] | 1385 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1386 | goto err_unlock_mailbox; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1387 | } |
| 1388 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1389 | /* Determine the appropriate minimum descriptor size. */ |
| 1390 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 1391 | min_desc_size = sizeof(struct ffa_mtd_v1_0); |
| 1392 | } else { |
| 1393 | min_desc_size = sizeof(struct ffa_mtd); |
| 1394 | } |
| 1395 | if (total_length < min_desc_size) { |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1396 | WARN("%s: invalid length %u < %zu\n", __func__, total_length, |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1397 | min_desc_size); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1398 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1399 | goto err_unlock_mailbox; |
| 1400 | } |
| 1401 | |
| 1402 | spin_lock(&spmc_shmem_obj_state.lock); |
| 1403 | |
| 1404 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, req->handle); |
| 1405 | if (obj == NULL) { |
| 1406 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1407 | goto err_unlock_all; |
| 1408 | } |
| 1409 | |
| 1410 | if (obj->desc_filled != obj->desc_size) { |
| 1411 | WARN("%s: incomplete object desc filled %zu < size %zu\n", |
| 1412 | __func__, obj->desc_filled, obj->desc_size); |
| 1413 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1414 | goto err_unlock_all; |
| 1415 | } |
| 1416 | |
| 1417 | if (req->emad_count != 0U && req->sender_id != obj->desc.sender_id) { |
| 1418 | WARN("%s: wrong sender id 0x%x != 0x%x\n", |
| 1419 | __func__, req->sender_id, obj->desc.sender_id); |
| 1420 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1421 | goto err_unlock_all; |
| 1422 | } |
| 1423 | |
| 1424 | if (req->emad_count != 0U && req->tag != obj->desc.tag) { |
| 1425 | WARN("%s: wrong tag 0x%lx != 0x%lx\n", |
| 1426 | __func__, req->tag, obj->desc.tag); |
| 1427 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1428 | goto err_unlock_all; |
| 1429 | } |
| 1430 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1431 | if (req->emad_count != 0U && req->emad_count != obj->desc.emad_count) { |
| 1432 | WARN("%s: mistmatch of endpoint counts %u != %u\n", |
| 1433 | __func__, req->emad_count, obj->desc.emad_count); |
| 1434 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1435 | goto err_unlock_all; |
| 1436 | } |
| 1437 | |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1438 | /* Ensure the NS bit is set to 0 in the request. */ |
| 1439 | if ((req->memory_region_attributes & FFA_MEM_ATTR_NS_BIT) != 0U) { |
| 1440 | WARN("%s: NS mem attributes flags MBZ.\n", __func__); |
| 1441 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1442 | goto err_unlock_all; |
| 1443 | } |
| 1444 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1445 | if (req->flags != 0U) { |
| 1446 | if ((req->flags & FFA_MTD_FLAG_TYPE_MASK) != |
| 1447 | (obj->desc.flags & FFA_MTD_FLAG_TYPE_MASK)) { |
| 1448 | /* |
| 1449 | * If the retrieve request specifies the memory |
| 1450 | * transaction ensure it matches what we expect. |
| 1451 | */ |
| 1452 | WARN("%s: wrong mem transaction flags %x != %x\n", |
| 1453 | __func__, req->flags, obj->desc.flags); |
| 1454 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1455 | goto err_unlock_all; |
| 1456 | } |
| 1457 | |
| 1458 | if (req->flags != FFA_MTD_FLAG_TYPE_SHARE_MEMORY && |
| 1459 | req->flags != FFA_MTD_FLAG_TYPE_LEND_MEMORY) { |
| 1460 | /* |
| 1461 | * Current implementation does not support donate and |
| 1462 | * it supports no other flags. |
| 1463 | */ |
| 1464 | WARN("%s: invalid flags 0x%x\n", __func__, req->flags); |
| 1465 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1466 | goto err_unlock_all; |
| 1467 | } |
| 1468 | } |
| 1469 | |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1470 | /* Validate the caller is a valid participant. */ |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 1471 | if (!spmc_shmem_obj_validate_id(obj, sp_ctx->sp_id)) { |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1472 | WARN("%s: Invalid endpoint ID (0x%x).\n", |
| 1473 | __func__, sp_ctx->sp_id); |
| 1474 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1475 | goto err_unlock_all; |
| 1476 | } |
| 1477 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1478 | /* Validate that the provided emad offset and structure is valid.*/ |
| 1479 | for (size_t i = 0; i < req->emad_count; i++) { |
| 1480 | size_t emad_size; |
| 1481 | struct ffa_emad_v1_0 *emad; |
| 1482 | |
| 1483 | emad = spmc_shmem_obj_get_emad(req, i, ffa_version, |
| 1484 | &emad_size); |
| 1485 | if (emad == NULL) { |
| 1486 | WARN("%s: invalid emad structure.\n", __func__); |
| 1487 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1488 | goto err_unlock_all; |
| 1489 | } |
| 1490 | |
| 1491 | if ((uintptr_t) emad >= (uintptr_t) |
| 1492 | ((uint8_t *) req + total_length)) { |
| 1493 | WARN("Invalid emad access.\n"); |
| 1494 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1495 | goto err_unlock_all; |
| 1496 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1497 | } |
| 1498 | |
| 1499 | /* |
| 1500 | * Validate all the endpoints match in the case of multiple |
| 1501 | * borrowers. We don't mandate that the order of the borrowers |
| 1502 | * must match in the descriptors therefore check to see if the |
| 1503 | * endpoints match in any order. |
| 1504 | */ |
| 1505 | for (size_t i = 0; i < req->emad_count; i++) { |
| 1506 | bool found = false; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1507 | size_t emad_size; |
| 1508 | struct ffa_emad_v1_0 *emad; |
| 1509 | struct ffa_emad_v1_0 *other_emad; |
| 1510 | |
| 1511 | emad = spmc_shmem_obj_get_emad(req, i, ffa_version, |
| 1512 | &emad_size); |
| 1513 | if (emad == NULL) { |
| 1514 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1515 | goto err_unlock_all; |
| 1516 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1517 | |
| 1518 | for (size_t j = 0; j < obj->desc.emad_count; j++) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1519 | other_emad = spmc_shmem_obj_get_emad( |
| 1520 | &obj->desc, j, MAKE_FFA_VERSION(1, 1), |
| 1521 | &emad_size); |
| 1522 | |
| 1523 | if (other_emad == NULL) { |
| 1524 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1525 | goto err_unlock_all; |
| 1526 | } |
| 1527 | |
| 1528 | if (req->emad_count && |
| 1529 | emad->mapd.endpoint_id == |
| 1530 | other_emad->mapd.endpoint_id) { |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1531 | found = true; |
| 1532 | break; |
| 1533 | } |
| 1534 | } |
| 1535 | |
| 1536 | if (!found) { |
| 1537 | WARN("%s: invalid receiver id (0x%x).\n", |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1538 | __func__, emad->mapd.endpoint_id); |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1539 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1540 | goto err_unlock_all; |
| 1541 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1542 | } |
| 1543 | |
| 1544 | mbox->state = MAILBOX_STATE_FULL; |
| 1545 | |
| 1546 | if (req->emad_count != 0U) { |
| 1547 | obj->in_use++; |
| 1548 | } |
| 1549 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1550 | /* |
| 1551 | * If the caller is v1.0 convert the descriptor, otherwise copy |
| 1552 | * directly. |
| 1553 | */ |
| 1554 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 1555 | ret = spmc_populate_ffa_v1_0_descriptor(resp, obj, buf_size, 0, |
| 1556 | ©_size, |
| 1557 | &out_desc_size); |
| 1558 | if (ret != 0U) { |
| 1559 | ERROR("%s: Failed to process descriptor.\n", __func__); |
| 1560 | goto err_unlock_all; |
| 1561 | } |
| 1562 | } else { |
| 1563 | copy_size = MIN(obj->desc_size, buf_size); |
| 1564 | out_desc_size = obj->desc_size; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1565 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1566 | memcpy(resp, &obj->desc, copy_size); |
| 1567 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1568 | |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1569 | /* Set the NS bit in the response if applicable. */ |
| 1570 | spmc_ffa_mem_retrieve_set_ns_bit(resp, sp_ctx); |
| 1571 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1572 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1573 | spin_unlock(&mbox->lock); |
| 1574 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1575 | SMC_RET8(handle, FFA_MEM_RETRIEVE_RESP, out_desc_size, |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1576 | copy_size, 0, 0, 0, 0, 0); |
| 1577 | |
| 1578 | err_unlock_all: |
| 1579 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1580 | err_unlock_mailbox: |
| 1581 | spin_unlock(&mbox->lock); |
| 1582 | return spmc_ffa_error_return(handle, ret); |
| 1583 | } |
| 1584 | |
| 1585 | /** |
| 1586 | * spmc_ffa_mem_frag_rx - FFA_MEM_FRAG_RX implementation. |
| 1587 | * @client: Client state. |
| 1588 | * @handle_low: Handle passed to &FFA_MEM_RETRIEVE_REQ. Bit[31:0]. |
| 1589 | * @handle_high: Handle passed to &FFA_MEM_RETRIEVE_REQ. Bit[63:32]. |
| 1590 | * @fragment_offset: Byte offset in descriptor to resume at. |
| 1591 | * @sender_id: Bit[31:16]: Endpoint id of sender if client is a |
| 1592 | * hypervisor. 0 otherwise. |
| 1593 | * @smc_handle: Handle passed to smc call. Used to return |
| 1594 | * FFA_MEM_FRAG_TX. |
| 1595 | * |
| 1596 | * Return: @smc_handle on success, error code on failure. |
| 1597 | */ |
| 1598 | long spmc_ffa_mem_frag_rx(uint32_t smc_fid, |
| 1599 | bool secure_origin, |
| 1600 | uint32_t handle_low, |
| 1601 | uint32_t handle_high, |
| 1602 | uint32_t fragment_offset, |
| 1603 | uint32_t sender_id, |
| 1604 | void *cookie, |
| 1605 | void *handle, |
| 1606 | uint64_t flags) |
| 1607 | { |
| 1608 | int ret; |
| 1609 | void *src; |
| 1610 | size_t buf_size; |
| 1611 | size_t copy_size; |
| 1612 | size_t full_copy_size; |
| 1613 | uint32_t desc_sender_id; |
| 1614 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 1615 | uint64_t mem_handle = handle_low | (((uint64_t)handle_high) << 32); |
| 1616 | struct spmc_shmem_obj *obj; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1617 | uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1618 | |
| 1619 | if (!secure_origin) { |
| 1620 | WARN("%s: can only be called from swld.\n", |
| 1621 | __func__); |
| 1622 | return spmc_ffa_error_return(handle, |
| 1623 | FFA_ERROR_INVALID_PARAMETER); |
| 1624 | } |
| 1625 | |
| 1626 | spin_lock(&spmc_shmem_obj_state.lock); |
| 1627 | |
| 1628 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| 1629 | if (obj == NULL) { |
| 1630 | WARN("%s: invalid handle, 0x%lx, not a valid handle.\n", |
| 1631 | __func__, mem_handle); |
| 1632 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1633 | goto err_unlock_shmem; |
| 1634 | } |
| 1635 | |
| 1636 | desc_sender_id = (uint32_t)obj->desc.sender_id << 16; |
| 1637 | if (sender_id != 0U && sender_id != desc_sender_id) { |
| 1638 | WARN("%s: invalid sender_id 0x%x != 0x%x\n", __func__, |
| 1639 | sender_id, desc_sender_id); |
| 1640 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1641 | goto err_unlock_shmem; |
| 1642 | } |
| 1643 | |
| 1644 | if (fragment_offset >= obj->desc_size) { |
| 1645 | WARN("%s: invalid fragment_offset 0x%x >= 0x%zx\n", |
| 1646 | __func__, fragment_offset, obj->desc_size); |
| 1647 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1648 | goto err_unlock_shmem; |
| 1649 | } |
| 1650 | |
| 1651 | spin_lock(&mbox->lock); |
| 1652 | |
| 1653 | if (mbox->rxtx_page_count == 0U) { |
| 1654 | WARN("%s: buffer pair not registered.\n", __func__); |
| 1655 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1656 | goto err_unlock_all; |
| 1657 | } |
| 1658 | |
| 1659 | if (mbox->state != MAILBOX_STATE_EMPTY) { |
| 1660 | WARN("%s: RX Buffer is full!\n", __func__); |
| 1661 | ret = FFA_ERROR_DENIED; |
| 1662 | goto err_unlock_all; |
| 1663 | } |
| 1664 | |
| 1665 | buf_size = mbox->rxtx_page_count * FFA_PAGE_SIZE; |
| 1666 | |
| 1667 | mbox->state = MAILBOX_STATE_FULL; |
| 1668 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1669 | /* |
| 1670 | * If the caller is v1.0 convert the descriptor, otherwise copy |
| 1671 | * directly. |
| 1672 | */ |
| 1673 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 1674 | size_t out_desc_size; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1675 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1676 | ret = spmc_populate_ffa_v1_0_descriptor(mbox->rx_buffer, obj, |
| 1677 | buf_size, |
| 1678 | fragment_offset, |
| 1679 | ©_size, |
| 1680 | &out_desc_size); |
| 1681 | if (ret != 0U) { |
| 1682 | ERROR("%s: Failed to process descriptor.\n", __func__); |
| 1683 | goto err_unlock_all; |
| 1684 | } |
| 1685 | } else { |
| 1686 | full_copy_size = obj->desc_size - fragment_offset; |
| 1687 | copy_size = MIN(full_copy_size, buf_size); |
| 1688 | |
| 1689 | src = &obj->desc; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1690 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1691 | memcpy(mbox->rx_buffer, src + fragment_offset, copy_size); |
| 1692 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1693 | |
| 1694 | spin_unlock(&mbox->lock); |
| 1695 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1696 | |
| 1697 | SMC_RET8(handle, FFA_MEM_FRAG_TX, handle_low, handle_high, |
| 1698 | copy_size, sender_id, 0, 0, 0); |
| 1699 | |
| 1700 | err_unlock_all: |
| 1701 | spin_unlock(&mbox->lock); |
| 1702 | err_unlock_shmem: |
| 1703 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1704 | return spmc_ffa_error_return(handle, ret); |
| 1705 | } |
| 1706 | |
| 1707 | /** |
| 1708 | * spmc_ffa_mem_relinquish - FFA_MEM_RELINQUISH implementation. |
| 1709 | * @client: Client state. |
| 1710 | * |
| 1711 | * Implements a subset of the FF-A FFA_MEM_RELINQUISH call. |
| 1712 | * Used by secure os release previously shared memory to non-secure os. |
| 1713 | * |
| 1714 | * The handle to release must be in the client's (secure os's) transmit buffer. |
| 1715 | * |
| 1716 | * Return: 0 on success, error code on failure. |
| 1717 | */ |
| 1718 | int spmc_ffa_mem_relinquish(uint32_t smc_fid, |
| 1719 | bool secure_origin, |
| 1720 | uint32_t handle_low, |
| 1721 | uint32_t handle_high, |
| 1722 | uint32_t fragment_offset, |
| 1723 | uint32_t sender_id, |
| 1724 | void *cookie, |
| 1725 | void *handle, |
| 1726 | uint64_t flags) |
| 1727 | { |
| 1728 | int ret; |
| 1729 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 1730 | struct spmc_shmem_obj *obj; |
| 1731 | const struct ffa_mem_relinquish_descriptor *req; |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1732 | struct secure_partition_desc *sp_ctx = spmc_get_current_sp_ctx(); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1733 | |
| 1734 | if (!secure_origin) { |
| 1735 | WARN("%s: unsupported relinquish direction.\n", __func__); |
| 1736 | return spmc_ffa_error_return(handle, |
| 1737 | FFA_ERROR_INVALID_PARAMETER); |
| 1738 | } |
| 1739 | |
| 1740 | spin_lock(&mbox->lock); |
| 1741 | |
| 1742 | if (mbox->rxtx_page_count == 0U) { |
| 1743 | WARN("%s: buffer pair not registered.\n", __func__); |
| 1744 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1745 | goto err_unlock_mailbox; |
| 1746 | } |
| 1747 | |
| 1748 | req = mbox->tx_buffer; |
| 1749 | |
| 1750 | if (req->flags != 0U) { |
| 1751 | WARN("%s: unsupported flags 0x%x\n", __func__, req->flags); |
| 1752 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1753 | goto err_unlock_mailbox; |
| 1754 | } |
| 1755 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1756 | if (req->endpoint_count == 0) { |
| 1757 | WARN("%s: endpoint count cannot be 0.\n", __func__); |
| 1758 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1759 | goto err_unlock_mailbox; |
| 1760 | } |
| 1761 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1762 | spin_lock(&spmc_shmem_obj_state.lock); |
| 1763 | |
| 1764 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, req->handle); |
| 1765 | if (obj == NULL) { |
| 1766 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1767 | goto err_unlock_all; |
| 1768 | } |
| 1769 | |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1770 | /* |
| 1771 | * Validate the endpoint ID was populated correctly. We don't currently |
| 1772 | * support proxy endpoints so the endpoint count should always be 1. |
| 1773 | */ |
| 1774 | if (req->endpoint_count != 1U) { |
| 1775 | WARN("%s: unsupported endpoint count %u != 1\n", __func__, |
| 1776 | req->endpoint_count); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1777 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1778 | goto err_unlock_all; |
| 1779 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1780 | |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1781 | /* Validate provided endpoint ID matches the partition ID. */ |
| 1782 | if (req->endpoint_array[0] != sp_ctx->sp_id) { |
| 1783 | WARN("%s: invalid endpoint ID %u != %u\n", __func__, |
| 1784 | req->endpoint_array[0], sp_ctx->sp_id); |
| 1785 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1786 | goto err_unlock_all; |
| 1787 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1788 | |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1789 | /* Validate the caller is a valid participant. */ |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 1790 | if (!spmc_shmem_obj_validate_id(obj, sp_ctx->sp_id)) { |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1791 | WARN("%s: Invalid endpoint ID (0x%x).\n", |
| 1792 | __func__, req->endpoint_array[0]); |
| 1793 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1794 | goto err_unlock_all; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1795 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1796 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1797 | if (obj->in_use == 0U) { |
| 1798 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1799 | goto err_unlock_all; |
| 1800 | } |
| 1801 | obj->in_use--; |
| 1802 | |
| 1803 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1804 | spin_unlock(&mbox->lock); |
| 1805 | |
| 1806 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1807 | |
| 1808 | err_unlock_all: |
| 1809 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1810 | err_unlock_mailbox: |
| 1811 | spin_unlock(&mbox->lock); |
| 1812 | return spmc_ffa_error_return(handle, ret); |
| 1813 | } |
| 1814 | |
| 1815 | /** |
| 1816 | * spmc_ffa_mem_reclaim - FFA_MEM_RECLAIM implementation. |
| 1817 | * @client: Client state. |
| 1818 | * @handle_low: Unique handle of shared memory object to reclaim. Bit[31:0]. |
| 1819 | * @handle_high: Unique handle of shared memory object to reclaim. |
| 1820 | * Bit[63:32]. |
| 1821 | * @flags: Unsupported, ignored. |
| 1822 | * |
| 1823 | * Implements a subset of the FF-A FFA_MEM_RECLAIM call. |
| 1824 | * Used by non-secure os reclaim memory previously shared with secure os. |
| 1825 | * |
| 1826 | * Return: 0 on success, error code on failure. |
| 1827 | */ |
| 1828 | int spmc_ffa_mem_reclaim(uint32_t smc_fid, |
| 1829 | bool secure_origin, |
| 1830 | uint32_t handle_low, |
| 1831 | uint32_t handle_high, |
| 1832 | uint32_t mem_flags, |
| 1833 | uint64_t x4, |
| 1834 | void *cookie, |
| 1835 | void *handle, |
| 1836 | uint64_t flags) |
| 1837 | { |
| 1838 | int ret; |
| 1839 | struct spmc_shmem_obj *obj; |
| 1840 | uint64_t mem_handle = handle_low | (((uint64_t)handle_high) << 32); |
| 1841 | |
| 1842 | if (secure_origin) { |
| 1843 | WARN("%s: unsupported reclaim direction.\n", __func__); |
| 1844 | return spmc_ffa_error_return(handle, |
| 1845 | FFA_ERROR_INVALID_PARAMETER); |
| 1846 | } |
| 1847 | |
| 1848 | if (mem_flags != 0U) { |
| 1849 | WARN("%s: unsupported flags 0x%x\n", __func__, mem_flags); |
| 1850 | return spmc_ffa_error_return(handle, |
| 1851 | FFA_ERROR_INVALID_PARAMETER); |
| 1852 | } |
| 1853 | |
| 1854 | spin_lock(&spmc_shmem_obj_state.lock); |
| 1855 | |
| 1856 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| 1857 | if (obj == NULL) { |
| 1858 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1859 | goto err_unlock; |
| 1860 | } |
| 1861 | if (obj->in_use != 0U) { |
| 1862 | ret = FFA_ERROR_DENIED; |
| 1863 | goto err_unlock; |
| 1864 | } |
Marc Bonnici | 503320e | 2022-02-21 15:02:36 +0000 | [diff] [blame] | 1865 | |
Marc Bonnici | 82e28f1 | 2022-10-18 13:39:48 +0100 | [diff] [blame] | 1866 | if (obj->desc_filled != obj->desc_size) { |
| 1867 | WARN("%s: incomplete object desc filled %zu < size %zu\n", |
| 1868 | __func__, obj->desc_filled, obj->desc_size); |
| 1869 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1870 | goto err_unlock; |
| 1871 | } |
| 1872 | |
Marc Bonnici | 503320e | 2022-02-21 15:02:36 +0000 | [diff] [blame] | 1873 | /* Allow for platform specific operations to be performed. */ |
| 1874 | ret = plat_spmc_shmem_reclaim(&obj->desc); |
| 1875 | if (ret != 0) { |
| 1876 | goto err_unlock; |
| 1877 | } |
| 1878 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1879 | spmc_shmem_obj_free(&spmc_shmem_obj_state, obj); |
| 1880 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1881 | |
| 1882 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1883 | |
| 1884 | err_unlock: |
| 1885 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1886 | return spmc_ffa_error_return(handle, ret); |
| 1887 | } |