Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1 | /* |
Demi Marie Obenour | 1f9f830 | 2022-12-30 19:14:18 -0500 | [diff] [blame] | 2 | * Copyright (c) 2022-2023, ARM Limited and Contributors. All rights reserved. |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 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> |
Demi Marie Obenour | 4ed9df4 | 2022-12-30 19:30:58 -0500 | [diff] [blame] | 8 | #include <inttypes.h> |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 9 | |
| 10 | #include <common/debug.h> |
| 11 | #include <common/runtime_svc.h> |
| 12 | #include <lib/object_pool.h> |
| 13 | #include <lib/spinlock.h> |
| 14 | #include <lib/xlat_tables/xlat_tables_v2.h> |
| 15 | #include <services/ffa_svc.h> |
| 16 | #include "spmc.h" |
| 17 | #include "spmc_shared_mem.h" |
| 18 | |
| 19 | #include <platform_def.h> |
| 20 | |
| 21 | /** |
| 22 | * struct spmc_shmem_obj - Shared memory object. |
| 23 | * @desc_size: Size of @desc. |
| 24 | * @desc_filled: Size of @desc already received. |
| 25 | * @in_use: Number of clients that have called ffa_mem_retrieve_req |
| 26 | * without a matching ffa_mem_relinquish call. |
| 27 | * @desc: FF-A memory region descriptor passed in ffa_mem_share. |
| 28 | */ |
| 29 | struct spmc_shmem_obj { |
| 30 | size_t desc_size; |
| 31 | size_t desc_filled; |
| 32 | size_t in_use; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 33 | struct ffa_mtd desc; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 34 | }; |
| 35 | |
| 36 | /* |
| 37 | * Declare our data structure to store the metadata of memory share requests. |
| 38 | * The main datastore is allocated on a per platform basis to ensure enough |
| 39 | * storage can be made available. |
| 40 | * The address of the data store will be populated by the SPMC during its |
| 41 | * initialization. |
| 42 | */ |
| 43 | |
| 44 | struct spmc_shmem_obj_state spmc_shmem_obj_state = { |
| 45 | /* Set start value for handle so top 32 bits are needed quickly. */ |
| 46 | .next_handle = 0xffffffc0U, |
| 47 | }; |
| 48 | |
| 49 | /** |
| 50 | * spmc_shmem_obj_size - Convert from descriptor size to object size. |
| 51 | * @desc_size: Size of struct ffa_memory_region_descriptor object. |
| 52 | * |
| 53 | * Return: Size of struct spmc_shmem_obj object. |
| 54 | */ |
| 55 | static size_t spmc_shmem_obj_size(size_t desc_size) |
| 56 | { |
| 57 | return desc_size + offsetof(struct spmc_shmem_obj, desc); |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * spmc_shmem_obj_alloc - Allocate struct spmc_shmem_obj. |
| 62 | * @state: Global state. |
| 63 | * @desc_size: Size of struct ffa_memory_region_descriptor object that |
| 64 | * allocated object will hold. |
| 65 | * |
| 66 | * Return: Pointer to newly allocated object, or %NULL if there not enough space |
| 67 | * left. The returned pointer is only valid while @state is locked, to |
| 68 | * used it again after unlocking @state, spmc_shmem_obj_lookup must be |
| 69 | * called. |
| 70 | */ |
| 71 | static struct spmc_shmem_obj * |
| 72 | spmc_shmem_obj_alloc(struct spmc_shmem_obj_state *state, size_t desc_size) |
| 73 | { |
| 74 | struct spmc_shmem_obj *obj; |
| 75 | size_t free = state->data_size - state->allocated; |
Marc Bonnici | b774f56 | 2022-10-18 14:03:13 +0100 | [diff] [blame] | 76 | size_t obj_size; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 77 | |
| 78 | if (state->data == NULL) { |
| 79 | ERROR("Missing shmem datastore!\n"); |
| 80 | return NULL; |
| 81 | } |
| 82 | |
Demi Marie Obenour | c39cb4c | 2023-01-15 14:15:14 -0500 | [diff] [blame] | 83 | /* Ensure that descriptor size is aligned */ |
| 84 | if (!is_aligned(desc_size, 16)) { |
| 85 | WARN("%s(0x%zx) desc_size not 16-byte aligned\n", |
| 86 | __func__, desc_size); |
| 87 | return NULL; |
| 88 | } |
| 89 | |
Marc Bonnici | b774f56 | 2022-10-18 14:03:13 +0100 | [diff] [blame] | 90 | obj_size = spmc_shmem_obj_size(desc_size); |
| 91 | |
| 92 | /* Ensure the obj size has not overflowed. */ |
| 93 | if (obj_size < desc_size) { |
| 94 | WARN("%s(0x%zx) desc_size overflow\n", |
| 95 | __func__, desc_size); |
| 96 | return NULL; |
| 97 | } |
| 98 | |
| 99 | if (obj_size > free) { |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 100 | WARN("%s(0x%zx) failed, free 0x%zx\n", |
| 101 | __func__, desc_size, free); |
| 102 | return NULL; |
| 103 | } |
| 104 | obj = (struct spmc_shmem_obj *)(state->data + state->allocated); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 105 | obj->desc = (struct ffa_mtd) {0}; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 106 | obj->desc_size = desc_size; |
| 107 | obj->desc_filled = 0; |
| 108 | obj->in_use = 0; |
Marc Bonnici | b774f56 | 2022-10-18 14:03:13 +0100 | [diff] [blame] | 109 | state->allocated += obj_size; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 110 | return obj; |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * spmc_shmem_obj_free - Free struct spmc_shmem_obj. |
| 115 | * @state: Global state. |
| 116 | * @obj: Object to free. |
| 117 | * |
| 118 | * Release memory used by @obj. Other objects may move, so on return all |
| 119 | * pointers to struct spmc_shmem_obj object should be considered invalid, not |
| 120 | * just @obj. |
| 121 | * |
| 122 | * The current implementation always compacts the remaining objects to simplify |
| 123 | * the allocator and to avoid fragmentation. |
| 124 | */ |
| 125 | |
| 126 | static void spmc_shmem_obj_free(struct spmc_shmem_obj_state *state, |
| 127 | struct spmc_shmem_obj *obj) |
| 128 | { |
| 129 | size_t free_size = spmc_shmem_obj_size(obj->desc_size); |
| 130 | uint8_t *shift_dest = (uint8_t *)obj; |
| 131 | uint8_t *shift_src = shift_dest + free_size; |
| 132 | size_t shift_size = state->allocated - (shift_src - state->data); |
| 133 | |
| 134 | if (shift_size != 0U) { |
| 135 | memmove(shift_dest, shift_src, shift_size); |
| 136 | } |
| 137 | state->allocated -= free_size; |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * spmc_shmem_obj_lookup - Lookup struct spmc_shmem_obj by handle. |
| 142 | * @state: Global state. |
| 143 | * @handle: Unique handle of object to return. |
| 144 | * |
| 145 | * Return: struct spmc_shmem_obj_state object with handle matching @handle. |
| 146 | * %NULL, if not object in @state->data has a matching handle. |
| 147 | */ |
| 148 | static struct spmc_shmem_obj * |
| 149 | spmc_shmem_obj_lookup(struct spmc_shmem_obj_state *state, uint64_t handle) |
| 150 | { |
| 151 | uint8_t *curr = state->data; |
| 152 | |
| 153 | while (curr - state->data < state->allocated) { |
| 154 | struct spmc_shmem_obj *obj = (struct spmc_shmem_obj *)curr; |
| 155 | |
| 156 | if (obj->desc.handle == handle) { |
| 157 | return obj; |
| 158 | } |
| 159 | curr += spmc_shmem_obj_size(obj->desc_size); |
| 160 | } |
| 161 | return NULL; |
| 162 | } |
| 163 | |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 164 | /** |
| 165 | * spmc_shmem_obj_get_next - Get the next memory object from an offset. |
| 166 | * @offset: Offset used to track which objects have previously been |
| 167 | * returned. |
| 168 | * |
| 169 | * Return: the next struct spmc_shmem_obj_state object from the provided |
| 170 | * offset. |
| 171 | * %NULL, if there are no more objects. |
| 172 | */ |
| 173 | static struct spmc_shmem_obj * |
| 174 | spmc_shmem_obj_get_next(struct spmc_shmem_obj_state *state, size_t *offset) |
| 175 | { |
| 176 | uint8_t *curr = state->data + *offset; |
| 177 | |
| 178 | if (curr - state->data < state->allocated) { |
| 179 | struct spmc_shmem_obj *obj = (struct spmc_shmem_obj *)curr; |
| 180 | |
| 181 | *offset += spmc_shmem_obj_size(obj->desc_size); |
| 182 | |
| 183 | return obj; |
| 184 | } |
| 185 | return NULL; |
| 186 | } |
| 187 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 188 | /******************************************************************************* |
| 189 | * FF-A memory descriptor helper functions. |
| 190 | ******************************************************************************/ |
| 191 | /** |
| 192 | * spmc_shmem_obj_get_emad - Get the emad from a given index depending on the |
| 193 | * clients FF-A version. |
| 194 | * @desc: The memory transaction descriptor. |
| 195 | * @index: The index of the emad element to be accessed. |
| 196 | * @ffa_version: FF-A version of the provided structure. |
| 197 | * @emad_size: Will be populated with the size of the returned emad |
| 198 | * descriptor. |
| 199 | * Return: A pointer to the requested emad structure. |
| 200 | */ |
| 201 | static void * |
| 202 | spmc_shmem_obj_get_emad(const struct ffa_mtd *desc, uint32_t index, |
| 203 | uint32_t ffa_version, size_t *emad_size) |
| 204 | { |
| 205 | uint8_t *emad; |
Demi Marie Obenour | 32167a0 | 2023-01-11 10:51:01 -0500 | [diff] [blame] | 206 | |
| 207 | assert(index < desc->emad_count); |
| 208 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 209 | /* |
| 210 | * If the caller is using FF-A v1.0 interpret the descriptor as a v1.0 |
| 211 | * format, otherwise assume it is a v1.1 format. |
| 212 | */ |
| 213 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
Demi Marie Obenour | 57bf10c | 2022-12-31 11:11:18 -0500 | [diff] [blame] | 214 | emad = (uint8_t *)desc + offsetof(struct ffa_mtd_v1_0, emad); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 215 | *emad_size = sizeof(struct ffa_emad_v1_0); |
| 216 | } else { |
Demi Marie Obenour | 57bf10c | 2022-12-31 11:11:18 -0500 | [diff] [blame] | 217 | assert(is_aligned(desc->emad_offset, 16)); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 218 | emad = ((uint8_t *) desc + desc->emad_offset); |
| 219 | *emad_size = desc->emad_size; |
| 220 | } |
Demi Marie Obenour | 57bf10c | 2022-12-31 11:11:18 -0500 | [diff] [blame] | 221 | |
| 222 | assert(((uint64_t)index * (uint64_t)*emad_size) <= UINT32_MAX); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 223 | return (emad + (*emad_size * index)); |
| 224 | } |
| 225 | |
| 226 | /** |
| 227 | * spmc_shmem_obj_get_comp_mrd - Get comp_mrd from a mtd struct based on the |
| 228 | * FF-A version of the descriptor. |
| 229 | * @obj: Object containing ffa_memory_region_descriptor. |
| 230 | * |
| 231 | * Return: struct ffa_comp_mrd object corresponding to the composite memory |
| 232 | * region descriptor. |
| 233 | */ |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 234 | static struct ffa_comp_mrd * |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 235 | 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] | 236 | { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 237 | size_t emad_size; |
| 238 | /* |
| 239 | * The comp_mrd_offset field of the emad descriptor remains consistent |
| 240 | * between FF-A versions therefore we can use the v1.0 descriptor here |
| 241 | * in all cases. |
| 242 | */ |
| 243 | struct ffa_emad_v1_0 *emad = spmc_shmem_obj_get_emad(&obj->desc, 0, |
| 244 | ffa_version, |
| 245 | &emad_size); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 246 | |
| 247 | /* Ensure the composite descriptor offset is aligned. */ |
| 248 | if (!is_aligned(emad->comp_mrd_offset, 8)) { |
| 249 | WARN("Unaligned composite memory region descriptor offset.\n"); |
| 250 | return NULL; |
| 251 | } |
| 252 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 253 | return (struct ffa_comp_mrd *) |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 254 | ((uint8_t *)(&obj->desc) + emad->comp_mrd_offset); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 255 | } |
| 256 | |
| 257 | /** |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 258 | * spmc_shmem_obj_validate_id - Validate a partition ID is participating in |
| 259 | * a given memory transaction. |
| 260 | * @sp_id: Partition ID to validate. |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 261 | * @obj: The shared memory object containing the descriptor |
| 262 | * of the memory transaction. |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 263 | * Return: true if ID is valid, else false. |
| 264 | */ |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 265 | 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] | 266 | { |
| 267 | bool found = false; |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 268 | struct ffa_mtd *desc = &obj->desc; |
| 269 | size_t desc_size = obj->desc_size; |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 270 | |
| 271 | /* Validate the partition is a valid participant. */ |
| 272 | for (unsigned int i = 0U; i < desc->emad_count; i++) { |
| 273 | size_t emad_size; |
| 274 | struct ffa_emad_v1_0 *emad; |
| 275 | |
| 276 | emad = spmc_shmem_obj_get_emad(desc, i, |
| 277 | MAKE_FFA_VERSION(1, 1), |
| 278 | &emad_size); |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 279 | /* |
| 280 | * Validate the calculated emad address resides within the |
| 281 | * descriptor. |
| 282 | */ |
| 283 | if ((emad == NULL) || (uintptr_t) emad >= |
| 284 | (uintptr_t)((uint8_t *) desc + desc_size)) { |
| 285 | VERBOSE("Invalid emad.\n"); |
| 286 | break; |
| 287 | } |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 288 | if (sp_id == emad->mapd.endpoint_id) { |
| 289 | found = true; |
| 290 | break; |
| 291 | } |
| 292 | } |
| 293 | return found; |
| 294 | } |
| 295 | |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 296 | /* |
| 297 | * Compare two memory regions to determine if any range overlaps with another |
| 298 | * ongoing memory transaction. |
| 299 | */ |
| 300 | static bool |
| 301 | overlapping_memory_regions(struct ffa_comp_mrd *region1, |
| 302 | struct ffa_comp_mrd *region2) |
| 303 | { |
| 304 | uint64_t region1_start; |
| 305 | uint64_t region1_size; |
| 306 | uint64_t region1_end; |
| 307 | uint64_t region2_start; |
| 308 | uint64_t region2_size; |
| 309 | uint64_t region2_end; |
| 310 | |
| 311 | assert(region1 != NULL); |
| 312 | assert(region2 != NULL); |
| 313 | |
| 314 | if (region1 == region2) { |
| 315 | return true; |
| 316 | } |
| 317 | |
| 318 | /* |
| 319 | * Check each memory region in the request against existing |
| 320 | * transactions. |
| 321 | */ |
| 322 | for (size_t i = 0; i < region1->address_range_count; i++) { |
| 323 | |
| 324 | region1_start = region1->address_range_array[i].address; |
| 325 | region1_size = |
| 326 | region1->address_range_array[i].page_count * |
| 327 | PAGE_SIZE_4KB; |
| 328 | region1_end = region1_start + region1_size; |
| 329 | |
| 330 | for (size_t j = 0; j < region2->address_range_count; j++) { |
| 331 | |
| 332 | region2_start = region2->address_range_array[j].address; |
| 333 | region2_size = |
| 334 | region2->address_range_array[j].page_count * |
| 335 | PAGE_SIZE_4KB; |
| 336 | region2_end = region2_start + region2_size; |
| 337 | |
Marc Bonnici | 79669bb | 2022-10-18 13:50:04 +0100 | [diff] [blame] | 338 | /* Check if regions are not overlapping. */ |
| 339 | if (!((region2_end <= region1_start) || |
| 340 | (region1_end <= region2_start))) { |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 341 | WARN("Overlapping mem regions 0x%lx-0x%lx & 0x%lx-0x%lx\n", |
| 342 | region1_start, region1_end, |
| 343 | region2_start, region2_end); |
| 344 | return true; |
| 345 | } |
| 346 | } |
| 347 | } |
| 348 | return false; |
| 349 | } |
| 350 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 351 | /******************************************************************************* |
| 352 | * FF-A v1.0 Memory Descriptor Conversion Helpers. |
| 353 | ******************************************************************************/ |
| 354 | /** |
| 355 | * spmc_shm_get_v1_1_descriptor_size - Calculate the required size for a v1.1 |
| 356 | * converted descriptor. |
| 357 | * @orig: The original v1.0 memory transaction descriptor. |
| 358 | * @desc_size: The size of the original v1.0 memory transaction descriptor. |
| 359 | * |
| 360 | * Return: the size required to store the descriptor store in the v1.1 format. |
| 361 | */ |
Demi Marie Obenour | 81f0adc | 2023-01-12 14:28:32 -0500 | [diff] [blame] | 362 | static uint64_t |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 363 | spmc_shm_get_v1_1_descriptor_size(struct ffa_mtd_v1_0 *orig, size_t desc_size) |
| 364 | { |
Demi Marie Obenour | 81f0adc | 2023-01-12 14:28:32 -0500 | [diff] [blame] | 365 | uint64_t size = 0; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 366 | struct ffa_comp_mrd *mrd; |
| 367 | struct ffa_emad_v1_0 *emad_array = orig->emad; |
| 368 | |
| 369 | /* Get the size of the v1.1 descriptor. */ |
| 370 | size += sizeof(struct ffa_mtd); |
| 371 | |
| 372 | /* Add the size of the emad descriptors. */ |
| 373 | size += orig->emad_count * sizeof(struct ffa_emad_v1_0); |
| 374 | |
| 375 | /* Add the size of the composite mrds. */ |
| 376 | size += sizeof(struct ffa_comp_mrd); |
| 377 | |
| 378 | /* Add the size of the constituent mrds. */ |
| 379 | mrd = (struct ffa_comp_mrd *) ((uint8_t *) orig + |
| 380 | emad_array[0].comp_mrd_offset); |
| 381 | |
Demi Marie Obenour | 81f0adc | 2023-01-12 14:28:32 -0500 | [diff] [blame] | 382 | /* Add the size of the memory region descriptors. */ |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 383 | size += mrd->address_range_count * sizeof(struct ffa_cons_mrd); |
| 384 | |
| 385 | return size; |
| 386 | } |
| 387 | |
| 388 | /** |
| 389 | * spmc_shm_get_v1_0_descriptor_size - Calculate the required size for a v1.0 |
| 390 | * converted descriptor. |
| 391 | * @orig: The original v1.1 memory transaction descriptor. |
| 392 | * @desc_size: The size of the original v1.1 memory transaction descriptor. |
| 393 | * |
| 394 | * Return: the size required to store the descriptor store in the v1.0 format. |
| 395 | */ |
| 396 | static size_t |
| 397 | spmc_shm_get_v1_0_descriptor_size(struct ffa_mtd *orig, size_t desc_size) |
| 398 | { |
| 399 | size_t size = 0; |
| 400 | struct ffa_comp_mrd *mrd; |
| 401 | struct ffa_emad_v1_0 *emad_array = (struct ffa_emad_v1_0 *) |
| 402 | ((uint8_t *) orig + |
| 403 | orig->emad_offset); |
| 404 | |
| 405 | /* Get the size of the v1.0 descriptor. */ |
| 406 | size += sizeof(struct ffa_mtd_v1_0); |
| 407 | |
| 408 | /* Add the size of the v1.0 emad descriptors. */ |
| 409 | size += orig->emad_count * sizeof(struct ffa_emad_v1_0); |
| 410 | |
| 411 | /* Add the size of the composite mrds. */ |
| 412 | size += sizeof(struct ffa_comp_mrd); |
| 413 | |
| 414 | /* Add the size of the constituent mrds. */ |
| 415 | mrd = (struct ffa_comp_mrd *) ((uint8_t *) orig + |
| 416 | emad_array[0].comp_mrd_offset); |
| 417 | |
| 418 | /* Check the calculated address is within the memory descriptor. */ |
Marc Bonnici | f744c99 | 2022-10-18 18:01:44 +0100 | [diff] [blame] | 419 | if (((uintptr_t) mrd + sizeof(struct ffa_comp_mrd)) > |
| 420 | (uintptr_t)((uint8_t *) orig + desc_size)) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 421 | return 0; |
| 422 | } |
| 423 | size += mrd->address_range_count * sizeof(struct ffa_cons_mrd); |
| 424 | |
| 425 | return size; |
| 426 | } |
| 427 | |
| 428 | /** |
| 429 | * spmc_shm_convert_shmem_obj_from_v1_0 - Converts a given v1.0 memory object. |
| 430 | * @out_obj: The shared memory object to populate the converted descriptor. |
| 431 | * @orig: The shared memory object containing the v1.0 descriptor. |
| 432 | * |
| 433 | * Return: true if the conversion is successful else false. |
| 434 | */ |
| 435 | static bool |
| 436 | spmc_shm_convert_shmem_obj_from_v1_0(struct spmc_shmem_obj *out_obj, |
| 437 | struct spmc_shmem_obj *orig) |
| 438 | { |
| 439 | struct ffa_mtd_v1_0 *mtd_orig = (struct ffa_mtd_v1_0 *) &orig->desc; |
| 440 | struct ffa_mtd *out = &out_obj->desc; |
| 441 | struct ffa_emad_v1_0 *emad_array_in; |
| 442 | struct ffa_emad_v1_0 *emad_array_out; |
| 443 | struct ffa_comp_mrd *mrd_in; |
| 444 | struct ffa_comp_mrd *mrd_out; |
| 445 | |
| 446 | size_t mrd_in_offset; |
| 447 | size_t mrd_out_offset; |
| 448 | size_t mrd_size = 0; |
| 449 | |
| 450 | /* Populate the new descriptor format from the v1.0 struct. */ |
| 451 | out->sender_id = mtd_orig->sender_id; |
| 452 | out->memory_region_attributes = mtd_orig->memory_region_attributes; |
| 453 | out->flags = mtd_orig->flags; |
| 454 | out->handle = mtd_orig->handle; |
| 455 | out->tag = mtd_orig->tag; |
| 456 | out->emad_count = mtd_orig->emad_count; |
| 457 | out->emad_size = sizeof(struct ffa_emad_v1_0); |
| 458 | |
| 459 | /* |
| 460 | * We will locate the emad descriptors directly after the ffa_mtd |
| 461 | * struct. This will be 8-byte aligned. |
| 462 | */ |
| 463 | out->emad_offset = sizeof(struct ffa_mtd); |
| 464 | |
| 465 | emad_array_in = mtd_orig->emad; |
| 466 | emad_array_out = (struct ffa_emad_v1_0 *) |
| 467 | ((uint8_t *) out + out->emad_offset); |
| 468 | |
| 469 | /* Copy across the emad structs. */ |
| 470 | for (unsigned int i = 0U; i < out->emad_count; i++) { |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 471 | /* Bound check for emad array. */ |
| 472 | if (((uint8_t *)emad_array_in + sizeof(struct ffa_emad_v1_0)) > |
| 473 | ((uint8_t *) mtd_orig + orig->desc_size)) { |
| 474 | VERBOSE("%s: Invalid mtd structure.\n", __func__); |
| 475 | return false; |
| 476 | } |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 477 | memcpy(&emad_array_out[i], &emad_array_in[i], |
| 478 | sizeof(struct ffa_emad_v1_0)); |
| 479 | } |
| 480 | |
| 481 | /* Place the mrd descriptors after the end of the emad descriptors.*/ |
| 482 | mrd_in_offset = emad_array_in->comp_mrd_offset; |
| 483 | mrd_out_offset = out->emad_offset + (out->emad_size * out->emad_count); |
| 484 | mrd_out = (struct ffa_comp_mrd *) ((uint8_t *) out + mrd_out_offset); |
| 485 | |
| 486 | /* Add the size of the composite memory region descriptor. */ |
| 487 | mrd_size += sizeof(struct ffa_comp_mrd); |
| 488 | |
| 489 | /* Find the mrd descriptor. */ |
| 490 | mrd_in = (struct ffa_comp_mrd *) ((uint8_t *) mtd_orig + mrd_in_offset); |
| 491 | |
| 492 | /* Add the size of the constituent memory region descriptors. */ |
| 493 | mrd_size += mrd_in->address_range_count * sizeof(struct ffa_cons_mrd); |
| 494 | |
| 495 | /* |
| 496 | * Update the offset in the emads by the delta between the input and |
| 497 | * output addresses. |
| 498 | */ |
| 499 | for (unsigned int i = 0U; i < out->emad_count; i++) { |
| 500 | emad_array_out[i].comp_mrd_offset = |
| 501 | emad_array_in[i].comp_mrd_offset + |
| 502 | (mrd_out_offset - mrd_in_offset); |
| 503 | } |
| 504 | |
| 505 | /* Verify that we stay within bound of the memory descriptors. */ |
| 506 | if ((uintptr_t)((uint8_t *) mrd_in + mrd_size) > |
| 507 | (uintptr_t)((uint8_t *) mtd_orig + orig->desc_size) || |
| 508 | ((uintptr_t)((uint8_t *) mrd_out + mrd_size) > |
| 509 | (uintptr_t)((uint8_t *) out + out_obj->desc_size))) { |
| 510 | ERROR("%s: Invalid mrd structure.\n", __func__); |
| 511 | return false; |
| 512 | } |
| 513 | |
| 514 | /* Copy the mrd descriptors directly. */ |
| 515 | memcpy(mrd_out, mrd_in, mrd_size); |
| 516 | |
| 517 | return true; |
| 518 | } |
| 519 | |
| 520 | /** |
| 521 | * spmc_shm_convert_mtd_to_v1_0 - Converts a given v1.1 memory object to |
| 522 | * v1.0 memory object. |
| 523 | * @out_obj: The shared memory object to populate the v1.0 descriptor. |
| 524 | * @orig: The shared memory object containing the v1.1 descriptor. |
| 525 | * |
| 526 | * Return: true if the conversion is successful else false. |
| 527 | */ |
| 528 | static bool |
| 529 | spmc_shm_convert_mtd_to_v1_0(struct spmc_shmem_obj *out_obj, |
| 530 | struct spmc_shmem_obj *orig) |
| 531 | { |
| 532 | struct ffa_mtd *mtd_orig = &orig->desc; |
| 533 | struct ffa_mtd_v1_0 *out = (struct ffa_mtd_v1_0 *) &out_obj->desc; |
| 534 | struct ffa_emad_v1_0 *emad_in; |
| 535 | struct ffa_emad_v1_0 *emad_array_in; |
| 536 | struct ffa_emad_v1_0 *emad_array_out; |
| 537 | struct ffa_comp_mrd *mrd_in; |
| 538 | struct ffa_comp_mrd *mrd_out; |
| 539 | |
| 540 | size_t mrd_in_offset; |
| 541 | size_t mrd_out_offset; |
| 542 | size_t emad_out_array_size; |
| 543 | size_t mrd_size = 0; |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 544 | size_t orig_desc_size = orig->desc_size; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 545 | |
| 546 | /* Populate the v1.0 descriptor format from the v1.1 struct. */ |
| 547 | out->sender_id = mtd_orig->sender_id; |
| 548 | out->memory_region_attributes = mtd_orig->memory_region_attributes; |
| 549 | out->flags = mtd_orig->flags; |
| 550 | out->handle = mtd_orig->handle; |
| 551 | out->tag = mtd_orig->tag; |
| 552 | out->emad_count = mtd_orig->emad_count; |
| 553 | |
| 554 | /* Determine the location of the emad array in both descriptors. */ |
| 555 | emad_array_in = (struct ffa_emad_v1_0 *) |
| 556 | ((uint8_t *) mtd_orig + mtd_orig->emad_offset); |
| 557 | emad_array_out = out->emad; |
| 558 | |
| 559 | /* Copy across the emad structs. */ |
| 560 | emad_in = emad_array_in; |
| 561 | for (unsigned int i = 0U; i < out->emad_count; i++) { |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 562 | /* Bound check for emad array. */ |
| 563 | if (((uint8_t *)emad_in + sizeof(struct ffa_emad_v1_0)) > |
| 564 | ((uint8_t *) mtd_orig + orig_desc_size)) { |
| 565 | VERBOSE("%s: Invalid mtd structure.\n", __func__); |
| 566 | return false; |
| 567 | } |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 568 | memcpy(&emad_array_out[i], emad_in, |
| 569 | sizeof(struct ffa_emad_v1_0)); |
| 570 | |
| 571 | emad_in += mtd_orig->emad_size; |
| 572 | } |
| 573 | |
| 574 | /* Place the mrd descriptors after the end of the emad descriptors. */ |
| 575 | emad_out_array_size = sizeof(struct ffa_emad_v1_0) * out->emad_count; |
| 576 | |
| 577 | mrd_out_offset = (uint8_t *) out->emad - (uint8_t *) out + |
| 578 | emad_out_array_size; |
| 579 | |
| 580 | mrd_out = (struct ffa_comp_mrd *) ((uint8_t *) out + mrd_out_offset); |
| 581 | |
| 582 | mrd_in_offset = mtd_orig->emad_offset + |
| 583 | (mtd_orig->emad_size * mtd_orig->emad_count); |
| 584 | |
| 585 | /* Add the size of the composite memory region descriptor. */ |
| 586 | mrd_size += sizeof(struct ffa_comp_mrd); |
| 587 | |
| 588 | /* Find the mrd descriptor. */ |
| 589 | mrd_in = (struct ffa_comp_mrd *) ((uint8_t *) mtd_orig + mrd_in_offset); |
| 590 | |
| 591 | /* Add the size of the constituent memory region descriptors. */ |
| 592 | mrd_size += mrd_in->address_range_count * sizeof(struct ffa_cons_mrd); |
| 593 | |
| 594 | /* |
| 595 | * Update the offset in the emads by the delta between the input and |
| 596 | * output addresses. |
| 597 | */ |
| 598 | emad_in = emad_array_in; |
| 599 | |
| 600 | for (unsigned int i = 0U; i < out->emad_count; i++) { |
| 601 | emad_array_out[i].comp_mrd_offset = emad_in->comp_mrd_offset + |
| 602 | (mrd_out_offset - |
| 603 | mrd_in_offset); |
| 604 | emad_in += mtd_orig->emad_size; |
| 605 | } |
| 606 | |
| 607 | /* Verify that we stay within bound of the memory descriptors. */ |
| 608 | if ((uintptr_t)((uint8_t *) mrd_in + mrd_size) > |
| 609 | (uintptr_t)((uint8_t *) mtd_orig + orig->desc_size) || |
| 610 | ((uintptr_t)((uint8_t *) mrd_out + mrd_size) > |
| 611 | (uintptr_t)((uint8_t *) out + out_obj->desc_size))) { |
| 612 | ERROR("%s: Invalid mrd structure.\n", __func__); |
| 613 | return false; |
| 614 | } |
| 615 | |
| 616 | /* Copy the mrd descriptors directly. */ |
| 617 | memcpy(mrd_out, mrd_in, mrd_size); |
| 618 | |
| 619 | return true; |
| 620 | } |
| 621 | |
| 622 | /** |
| 623 | * spmc_populate_ffa_v1_0_descriptor - Converts a given v1.1 memory object to |
| 624 | * the v1.0 format and populates the |
| 625 | * provided buffer. |
| 626 | * @dst: Buffer to populate v1.0 ffa_memory_region_descriptor. |
| 627 | * @orig_obj: Object containing v1.1 ffa_memory_region_descriptor. |
| 628 | * @buf_size: Size of the buffer to populate. |
| 629 | * @offset: The offset of the converted descriptor to copy. |
| 630 | * @copy_size: Will be populated with the number of bytes copied. |
| 631 | * @out_desc_size: Will be populated with the total size of the v1.0 |
| 632 | * descriptor. |
| 633 | * |
| 634 | * Return: 0 if conversion and population succeeded. |
| 635 | * Note: This function invalidates the reference to @orig therefore |
| 636 | * `spmc_shmem_obj_lookup` must be called if further usage is required. |
| 637 | */ |
| 638 | static uint32_t |
| 639 | spmc_populate_ffa_v1_0_descriptor(void *dst, struct spmc_shmem_obj *orig_obj, |
| 640 | size_t buf_size, size_t offset, |
| 641 | size_t *copy_size, size_t *v1_0_desc_size) |
| 642 | { |
| 643 | struct spmc_shmem_obj *v1_0_obj; |
| 644 | |
| 645 | /* Calculate the size that the v1.0 descriptor will require. */ |
| 646 | *v1_0_desc_size = spmc_shm_get_v1_0_descriptor_size( |
| 647 | &orig_obj->desc, orig_obj->desc_size); |
| 648 | |
| 649 | if (*v1_0_desc_size == 0) { |
| 650 | ERROR("%s: cannot determine size of descriptor.\n", |
| 651 | __func__); |
| 652 | return FFA_ERROR_INVALID_PARAMETER; |
| 653 | } |
| 654 | |
| 655 | /* Get a new obj to store the v1.0 descriptor. */ |
| 656 | v1_0_obj = spmc_shmem_obj_alloc(&spmc_shmem_obj_state, |
| 657 | *v1_0_desc_size); |
| 658 | |
| 659 | if (!v1_0_obj) { |
| 660 | return FFA_ERROR_NO_MEMORY; |
| 661 | } |
| 662 | |
| 663 | /* Perform the conversion from v1.1 to v1.0. */ |
| 664 | if (!spmc_shm_convert_mtd_to_v1_0(v1_0_obj, orig_obj)) { |
| 665 | spmc_shmem_obj_free(&spmc_shmem_obj_state, v1_0_obj); |
| 666 | return FFA_ERROR_INVALID_PARAMETER; |
| 667 | } |
| 668 | |
| 669 | *copy_size = MIN(v1_0_obj->desc_size - offset, buf_size); |
| 670 | memcpy(dst, (uint8_t *) &v1_0_obj->desc + offset, *copy_size); |
| 671 | |
| 672 | /* |
| 673 | * We're finished with the v1.0 descriptor for now so free it. |
| 674 | * Note that this will invalidate any references to the v1.1 |
| 675 | * descriptor. |
| 676 | */ |
| 677 | spmc_shmem_obj_free(&spmc_shmem_obj_state, v1_0_obj); |
| 678 | |
| 679 | return 0; |
| 680 | } |
| 681 | |
Demi Marie Obenour | 4ed9df4 | 2022-12-30 19:30:58 -0500 | [diff] [blame] | 682 | static int |
| 683 | spmc_validate_mtd_start(struct ffa_mtd *desc, uint32_t ffa_version, |
| 684 | size_t fragment_length, size_t total_length) |
| 685 | { |
| 686 | unsigned long long emad_end; |
| 687 | unsigned long long emad_size; |
| 688 | unsigned long long emad_offset; |
| 689 | unsigned int min_desc_size; |
| 690 | |
| 691 | /* Determine the appropriate minimum descriptor size. */ |
| 692 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 693 | min_desc_size = sizeof(struct ffa_mtd_v1_0); |
| 694 | } else if (ffa_version == MAKE_FFA_VERSION(1, 1)) { |
| 695 | min_desc_size = sizeof(struct ffa_mtd); |
| 696 | } else { |
| 697 | return FFA_ERROR_INVALID_PARAMETER; |
| 698 | } |
| 699 | if (fragment_length < min_desc_size) { |
| 700 | WARN("%s: invalid length %zu < %u\n", __func__, fragment_length, |
| 701 | min_desc_size); |
| 702 | return FFA_ERROR_INVALID_PARAMETER; |
| 703 | } |
| 704 | |
| 705 | if (desc->emad_count == 0U) { |
| 706 | WARN("%s: unsupported attribute desc count %u.\n", |
| 707 | __func__, desc->emad_count); |
| 708 | return FFA_ERROR_INVALID_PARAMETER; |
| 709 | } |
| 710 | |
| 711 | /* |
| 712 | * If the caller is using FF-A v1.0 interpret the descriptor as a v1.0 |
| 713 | * format, otherwise assume it is a v1.1 format. |
| 714 | */ |
| 715 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 716 | emad_offset = emad_size = sizeof(struct ffa_emad_v1_0); |
| 717 | } else { |
| 718 | if (!is_aligned(desc->emad_offset, 16)) { |
| 719 | WARN("%s: Emad offset %" PRIx32 " is not 16-byte aligned.\n", |
| 720 | __func__, desc->emad_offset); |
| 721 | return FFA_ERROR_INVALID_PARAMETER; |
| 722 | } |
| 723 | if (desc->emad_offset < sizeof(struct ffa_mtd)) { |
| 724 | WARN("%s: Emad offset too small: 0x%" PRIx32 " < 0x%zx.\n", |
| 725 | __func__, desc->emad_offset, |
| 726 | sizeof(struct ffa_mtd)); |
| 727 | return FFA_ERROR_INVALID_PARAMETER; |
| 728 | } |
| 729 | emad_offset = desc->emad_offset; |
| 730 | if (desc->emad_size < sizeof(struct ffa_emad_v1_0)) { |
| 731 | WARN("%s: Bad emad size (%" PRIu32 " < %zu).\n", __func__, |
| 732 | desc->emad_size, sizeof(struct ffa_emad_v1_0)); |
| 733 | return FFA_ERROR_INVALID_PARAMETER; |
| 734 | } |
| 735 | if (!is_aligned(desc->emad_size, 16)) { |
| 736 | WARN("%s: Emad size 0x%" PRIx32 " is not 16-byte aligned.\n", |
| 737 | __func__, desc->emad_size); |
| 738 | return FFA_ERROR_INVALID_PARAMETER; |
| 739 | } |
| 740 | emad_size = desc->emad_size; |
| 741 | } |
| 742 | |
| 743 | /* |
| 744 | * Overflow is impossible: the arithmetic happens in at least 64-bit |
| 745 | * precision, but all of the operands are bounded by UINT32_MAX, and |
Demi Marie Obenour | 7763c1b | 2023-06-12 13:15:09 -0400 | [diff] [blame] | 746 | * ((2^32 - 1) * (2^32 - 1) + (2^32 - 1) + (2^32 - 1)) |
| 747 | * = ((2^32 - 1) * ((2^32 - 1) + 1 + 1)) |
| 748 | * = ((2^32 - 1) * (2^32 + 1)) |
Demi Marie Obenour | 4ed9df4 | 2022-12-30 19:30:58 -0500 | [diff] [blame] | 749 | * = (2^64 - 1). |
| 750 | */ |
Demi Marie Obenour | 7763c1b | 2023-06-12 13:15:09 -0400 | [diff] [blame] | 751 | CASSERT(sizeof(desc->emad_count) == 4, assert_emad_count_max_too_large); |
Demi Marie Obenour | 4ed9df4 | 2022-12-30 19:30:58 -0500 | [diff] [blame] | 752 | emad_end = (desc->emad_count * (unsigned long long)emad_size) + |
| 753 | (unsigned long long)sizeof(struct ffa_comp_mrd) + |
| 754 | (unsigned long long)emad_offset; |
| 755 | |
| 756 | if (emad_end > total_length) { |
| 757 | WARN("%s: Composite memory region extends beyond descriptor: 0x%llx > 0x%zx\n", |
| 758 | __func__, emad_end, total_length); |
| 759 | return FFA_ERROR_INVALID_PARAMETER; |
| 760 | } |
| 761 | |
| 762 | return 0; |
| 763 | } |
| 764 | |
Demi Marie Obenour | 023d212 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 765 | static inline const struct ffa_emad_v1_0 * |
| 766 | emad_advance(const struct ffa_emad_v1_0 *emad, size_t offset) |
| 767 | { |
| 768 | return (const struct ffa_emad_v1_0 *)((const uint8_t *)emad + offset); |
| 769 | } |
| 770 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 771 | /** |
| 772 | * spmc_shmem_check_obj - Check that counts in descriptor match overall size. |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 773 | * @obj: Object containing ffa_memory_region_descriptor. |
| 774 | * @ffa_version: FF-A version of the provided descriptor. |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 775 | * |
Demi Marie Obenour | f215bb7 | 2023-01-12 14:40:22 -0500 | [diff] [blame] | 776 | * Return: 0 if object is valid, FFA_ERROR_INVALID_PARAMETER if |
| 777 | * constituent_memory_region_descriptor offset or count is invalid. |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 778 | */ |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 779 | static int spmc_shmem_check_obj(struct spmc_shmem_obj *obj, |
| 780 | uint32_t ffa_version) |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 781 | { |
Demi Marie Obenour | 14f1963 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 782 | unsigned long long total_page_count; |
Demi Marie Obenour | 023d212 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 783 | const struct ffa_emad_v1_0 *first_emad; |
| 784 | const struct ffa_emad_v1_0 *end_emad; |
Demi Marie Obenour | b720be7 | 2023-01-12 13:33:02 -0500 | [diff] [blame] | 785 | size_t emad_size; |
Demi Marie Obenour | 14f1963 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 786 | uint32_t comp_mrd_offset; |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 787 | size_t header_emad_size; |
| 788 | size_t size; |
| 789 | size_t count; |
| 790 | size_t expected_size; |
Demi Marie Obenour | 14f1963 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 791 | const struct ffa_comp_mrd *comp; |
Demi Marie Obenour | b720be7 | 2023-01-12 13:33:02 -0500 | [diff] [blame] | 792 | |
Demi Marie Obenour | f00e4d7 | 2023-01-12 13:25:23 -0500 | [diff] [blame] | 793 | if (obj->desc_filled != obj->desc_size) { |
| 794 | ERROR("BUG: %s called on incomplete object (%zu != %zu)\n", |
| 795 | __func__, obj->desc_filled, obj->desc_size); |
| 796 | panic(); |
| 797 | } |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 798 | |
Demi Marie Obenour | f00e4d7 | 2023-01-12 13:25:23 -0500 | [diff] [blame] | 799 | if (spmc_validate_mtd_start(&obj->desc, ffa_version, |
| 800 | obj->desc_filled, obj->desc_size)) { |
| 801 | ERROR("BUG: %s called on object with corrupt memory region descriptor\n", |
| 802 | __func__); |
| 803 | panic(); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 804 | } |
| 805 | |
Demi Marie Obenour | 023d212 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 806 | first_emad = spmc_shmem_obj_get_emad(&obj->desc, 0, |
| 807 | ffa_version, &emad_size); |
| 808 | end_emad = emad_advance(first_emad, obj->desc.emad_count * emad_size); |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 809 | comp_mrd_offset = first_emad->comp_mrd_offset; |
Demi Marie Obenour | b720be7 | 2023-01-12 13:33:02 -0500 | [diff] [blame] | 810 | |
Demi Marie Obenour | 023d212 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 811 | /* Loop through the endpoint descriptors, validating each of them. */ |
Demi Marie Obenour | 70179dc | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 812 | for (const struct ffa_emad_v1_0 *emad = first_emad; emad < end_emad;) { |
Demi Marie Obenour | b720be7 | 2023-01-12 13:33:02 -0500 | [diff] [blame] | 813 | ffa_endpoint_id16_t ep_id; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 814 | |
Demi Marie Obenour | 8711be3 | 2023-01-11 14:20:07 -0500 | [diff] [blame] | 815 | /* |
Demi Marie Obenour | b720be7 | 2023-01-12 13:33:02 -0500 | [diff] [blame] | 816 | * If a partition ID resides in the secure world validate that |
| 817 | * the partition ID is for a known partition. Ignore any |
| 818 | * partition ID belonging to the normal world as it is assumed |
| 819 | * the Hypervisor will have validated these. |
| 820 | */ |
| 821 | ep_id = emad->mapd.endpoint_id; |
| 822 | if (ffa_is_secure_world_id(ep_id)) { |
| 823 | if (spmc_get_sp_ctx(ep_id) == NULL) { |
| 824 | WARN("%s: Invalid receiver id 0x%x\n", |
| 825 | __func__, ep_id); |
Demi Marie Obenour | f215bb7 | 2023-01-12 14:40:22 -0500 | [diff] [blame] | 826 | return FFA_ERROR_INVALID_PARAMETER; |
Demi Marie Obenour | b720be7 | 2023-01-12 13:33:02 -0500 | [diff] [blame] | 827 | } |
| 828 | } |
| 829 | |
| 830 | /* |
Demi Marie Obenour | 8711be3 | 2023-01-11 14:20:07 -0500 | [diff] [blame] | 831 | * The offset provided to the composite memory region descriptor |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 832 | * should be consistent across endpoint descriptors. |
Demi Marie Obenour | 8711be3 | 2023-01-11 14:20:07 -0500 | [diff] [blame] | 833 | */ |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 834 | if (comp_mrd_offset != emad->comp_mrd_offset) { |
| 835 | ERROR("%s: mismatching offsets provided, %u != %u\n", |
| 836 | __func__, emad->comp_mrd_offset, comp_mrd_offset); |
| 837 | return FFA_ERROR_INVALID_PARAMETER; |
Demi Marie Obenour | 8711be3 | 2023-01-11 14:20:07 -0500 | [diff] [blame] | 838 | } |
Demi Marie Obenour | 70179dc | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 839 | |
| 840 | /* Advance to the next endpoint descriptor */ |
| 841 | emad = emad_advance(emad, emad_size); |
| 842 | |
| 843 | /* |
| 844 | * Ensure neither this emad nor any subsequent emads have |
| 845 | * the same partition ID as the previous emad. |
| 846 | */ |
| 847 | for (const struct ffa_emad_v1_0 *other_emad = emad; |
| 848 | other_emad < end_emad; |
| 849 | other_emad = emad_advance(other_emad, emad_size)) { |
| 850 | if (ep_id == other_emad->mapd.endpoint_id) { |
| 851 | WARN("%s: Duplicated endpoint id 0x%x\n", |
| 852 | __func__, emad->mapd.endpoint_id); |
| 853 | return FFA_ERROR_INVALID_PARAMETER; |
| 854 | } |
| 855 | } |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 856 | } |
Demi Marie Obenour | 8711be3 | 2023-01-11 14:20:07 -0500 | [diff] [blame] | 857 | |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 858 | header_emad_size = (size_t)((const uint8_t *)end_emad - |
| 859 | (const uint8_t *)&obj->desc); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 860 | |
Demi Marie Obenour | f86a738 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 861 | /* |
| 862 | * Check that the composite descriptor |
| 863 | * is after the endpoint descriptors. |
| 864 | */ |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 865 | if (comp_mrd_offset < header_emad_size) { |
| 866 | WARN("%s: invalid object, offset %u < header + emad %zu\n", |
| 867 | __func__, comp_mrd_offset, header_emad_size); |
| 868 | return FFA_ERROR_INVALID_PARAMETER; |
| 869 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 870 | |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 871 | /* Ensure the composite descriptor offset is aligned. */ |
| 872 | if (!is_aligned(comp_mrd_offset, 16)) { |
| 873 | WARN("%s: invalid object, unaligned composite memory " |
| 874 | "region descriptor offset %u.\n", |
| 875 | __func__, comp_mrd_offset); |
| 876 | return FFA_ERROR_INVALID_PARAMETER; |
| 877 | } |
Demi Marie Obenour | 05da811 | 2023-01-15 14:37:36 -0500 | [diff] [blame] | 878 | |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 879 | size = obj->desc_size; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 880 | |
Demi Marie Obenour | f86a738 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 881 | /* Check that the composite descriptor is in bounds. */ |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 882 | if (comp_mrd_offset > size) { |
| 883 | WARN("%s: invalid object, offset %u > total size %zu\n", |
| 884 | __func__, comp_mrd_offset, obj->desc_size); |
| 885 | return FFA_ERROR_INVALID_PARAMETER; |
| 886 | } |
| 887 | size -= comp_mrd_offset; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 888 | |
Demi Marie Obenour | 14f1963 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 889 | /* Check that there is enough space for the composite descriptor. */ |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 890 | if (size < sizeof(struct ffa_comp_mrd)) { |
| 891 | WARN("%s: invalid object, offset %u, total size %zu, no header space.\n", |
| 892 | __func__, comp_mrd_offset, obj->desc_size); |
| 893 | return FFA_ERROR_INVALID_PARAMETER; |
| 894 | } |
Demi Marie Obenour | 14f1963 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 895 | size -= sizeof(*comp); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 896 | |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 897 | count = size / sizeof(struct ffa_cons_mrd); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 898 | |
Demi Marie Obenour | 14f1963 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 899 | comp = (const struct ffa_comp_mrd *) |
| 900 | ((const uint8_t *)(&obj->desc) + comp_mrd_offset); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 901 | |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 902 | if (comp->address_range_count != count) { |
| 903 | WARN("%s: invalid object, desc count %u != %zu\n", |
| 904 | __func__, comp->address_range_count, count); |
| 905 | return FFA_ERROR_INVALID_PARAMETER; |
| 906 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 907 | |
Demi Marie Obenour | 14f1963 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 908 | /* Ensure that the expected and actual sizes are equal. */ |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 909 | expected_size = comp_mrd_offset + sizeof(*comp) + |
| 910 | count * sizeof(struct ffa_cons_mrd); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 911 | |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 912 | if (expected_size != obj->desc_size) { |
| 913 | WARN("%s: invalid object, computed size %zu != size %zu\n", |
| 914 | __func__, expected_size, obj->desc_size); |
| 915 | return FFA_ERROR_INVALID_PARAMETER; |
| 916 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 917 | |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 918 | total_page_count = 0; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 919 | |
Demi Marie Obenour | 14f1963 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 920 | /* |
| 921 | * comp->address_range_count is 32-bit, so 'count' must fit in a |
| 922 | * uint32_t at this point. |
| 923 | */ |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 924 | for (size_t i = 0; i < count; i++) { |
Demi Marie Obenour | 1796712 | 2023-01-15 15:31:45 -0500 | [diff] [blame] | 925 | const struct ffa_cons_mrd *mrd = comp->address_range_array + i; |
| 926 | |
| 927 | if (!is_aligned(mrd->address, PAGE_SIZE)) { |
| 928 | WARN("%s: invalid object, address in region descriptor " |
| 929 | "%zu not 4K aligned (got 0x%016llx)", |
| 930 | __func__, i, (unsigned long long)mrd->address); |
| 931 | } |
| 932 | |
Demi Marie Obenour | 14f1963 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 933 | /* |
| 934 | * No overflow possible: total_page_count can hold at |
| 935 | * least 2^64 - 1, but will be have at most 2^32 - 1. |
| 936 | * values added to it, each of which cannot exceed 2^32 - 1. |
| 937 | */ |
Demi Marie Obenour | 1796712 | 2023-01-15 15:31:45 -0500 | [diff] [blame] | 938 | total_page_count += mrd->page_count; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 939 | } |
Demi Marie Obenour | 14f1963 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 940 | |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 941 | if (comp->total_page_count != total_page_count) { |
Demi Marie Obenour | 14f1963 | 2023-01-15 14:18:13 -0500 | [diff] [blame] | 942 | WARN("%s: invalid object, desc total_page_count %u != %llu\n", |
| 943 | __func__, comp->total_page_count, total_page_count); |
Demi Marie Obenour | 07d8e2c | 2023-01-15 14:43:47 -0500 | [diff] [blame] | 944 | return FFA_ERROR_INVALID_PARAMETER; |
| 945 | } |
| 946 | |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 947 | return 0; |
| 948 | } |
| 949 | |
| 950 | /** |
| 951 | * spmc_shmem_check_state_obj - Check if the descriptor describes memory |
| 952 | * regions that are currently involved with an |
| 953 | * existing memory transactions. This implies that |
| 954 | * the memory is not in a valid state for lending. |
| 955 | * @obj: Object containing ffa_memory_region_descriptor. |
| 956 | * |
Demi Marie Obenour | f215bb7 | 2023-01-12 14:40:22 -0500 | [diff] [blame] | 957 | * Return: 0 if object is valid, FFA_ERROR_INVALID_PARAMETER if invalid memory |
| 958 | * state. |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 959 | */ |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 960 | static int spmc_shmem_check_state_obj(struct spmc_shmem_obj *obj, |
| 961 | uint32_t ffa_version) |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 962 | { |
| 963 | size_t obj_offset = 0; |
| 964 | struct spmc_shmem_obj *inflight_obj; |
| 965 | |
| 966 | struct ffa_comp_mrd *other_mrd; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 967 | struct ffa_comp_mrd *requested_mrd = spmc_shmem_obj_get_comp_mrd(obj, |
| 968 | ffa_version); |
| 969 | |
| 970 | if (requested_mrd == NULL) { |
Demi Marie Obenour | f215bb7 | 2023-01-12 14:40:22 -0500 | [diff] [blame] | 971 | return FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 972 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 973 | |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 974 | inflight_obj = spmc_shmem_obj_get_next(&spmc_shmem_obj_state, |
| 975 | &obj_offset); |
| 976 | |
| 977 | while (inflight_obj != NULL) { |
| 978 | /* |
| 979 | * Don't compare the transaction to itself or to partially |
| 980 | * transmitted descriptors. |
| 981 | */ |
| 982 | if ((obj->desc.handle != inflight_obj->desc.handle) && |
| 983 | (obj->desc_size == obj->desc_filled)) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 984 | other_mrd = spmc_shmem_obj_get_comp_mrd(inflight_obj, |
Marc Bonnici | 344ca9d | 2022-05-20 14:38:55 +0100 | [diff] [blame] | 985 | FFA_VERSION_COMPILED); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 986 | if (other_mrd == NULL) { |
Demi Marie Obenour | f215bb7 | 2023-01-12 14:40:22 -0500 | [diff] [blame] | 987 | return FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 988 | } |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 989 | if (overlapping_memory_regions(requested_mrd, |
| 990 | other_mrd)) { |
Demi Marie Obenour | f215bb7 | 2023-01-12 14:40:22 -0500 | [diff] [blame] | 991 | return FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 992 | } |
| 993 | } |
| 994 | |
| 995 | inflight_obj = spmc_shmem_obj_get_next(&spmc_shmem_obj_state, |
| 996 | &obj_offset); |
| 997 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 998 | return 0; |
| 999 | } |
| 1000 | |
| 1001 | static long spmc_ffa_fill_desc(struct mailbox *mbox, |
| 1002 | struct spmc_shmem_obj *obj, |
| 1003 | uint32_t fragment_length, |
| 1004 | ffa_mtd_flag32_t mtd_flag, |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1005 | uint32_t ffa_version, |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1006 | void *smc_handle) |
| 1007 | { |
| 1008 | int ret; |
| 1009 | uint32_t handle_low; |
| 1010 | uint32_t handle_high; |
| 1011 | |
| 1012 | if (mbox->rxtx_page_count == 0U) { |
| 1013 | WARN("%s: buffer pair not registered.\n", __func__); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1014 | ret = FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1015 | goto err_arg; |
| 1016 | } |
| 1017 | |
Demi Marie Obenour | 4a3a6d3 | 2023-01-12 14:22:18 -0500 | [diff] [blame] | 1018 | CASSERT(sizeof(mbox->rxtx_page_count) == 4, assert_bogus_page_count); |
| 1019 | if (fragment_length > (uint64_t)mbox->rxtx_page_count * PAGE_SIZE_4KB) { |
| 1020 | WARN("%s: bad fragment size %u > %" PRIu64 " buffer size\n", __func__, |
| 1021 | fragment_length, (uint64_t)mbox->rxtx_page_count * PAGE_SIZE_4KB); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1022 | ret = FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1023 | goto err_arg; |
| 1024 | } |
| 1025 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1026 | if (fragment_length > obj->desc_size - obj->desc_filled) { |
| 1027 | WARN("%s: bad fragment size %u > %zu remaining\n", __func__, |
| 1028 | fragment_length, obj->desc_size - obj->desc_filled); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1029 | ret = FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1030 | goto err_arg; |
| 1031 | } |
| 1032 | |
Marc Bonnici | f0f45dc | 2022-10-18 13:57:16 +0100 | [diff] [blame] | 1033 | memcpy((uint8_t *)&obj->desc + obj->desc_filled, |
| 1034 | (uint8_t *) mbox->tx_buffer, fragment_length); |
| 1035 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1036 | /* Ensure that the sender ID resides in the normal world. */ |
| 1037 | if (ffa_is_secure_world_id(obj->desc.sender_id)) { |
| 1038 | WARN("%s: Invalid sender ID 0x%x.\n", |
| 1039 | __func__, obj->desc.sender_id); |
| 1040 | ret = FFA_ERROR_DENIED; |
| 1041 | goto err_arg; |
| 1042 | } |
| 1043 | |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1044 | /* Ensure the NS bit is set to 0. */ |
| 1045 | if ((obj->desc.memory_region_attributes & FFA_MEM_ATTR_NS_BIT) != 0U) { |
| 1046 | WARN("%s: NS mem attributes flags MBZ.\n", __func__); |
| 1047 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1048 | goto err_arg; |
| 1049 | } |
| 1050 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1051 | /* |
| 1052 | * We don't currently support any optional flags so ensure none are |
| 1053 | * requested. |
| 1054 | */ |
| 1055 | if (obj->desc.flags != 0U && mtd_flag != 0U && |
| 1056 | (obj->desc.flags != mtd_flag)) { |
| 1057 | WARN("%s: invalid memory transaction flags %u != %u\n", |
| 1058 | __func__, obj->desc.flags, mtd_flag); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1059 | ret = FFA_ERROR_INVALID_PARAMETER; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1060 | goto err_arg; |
| 1061 | } |
| 1062 | |
| 1063 | if (obj->desc_filled == 0U) { |
| 1064 | /* First fragment, descriptor header has been copied */ |
Demi Marie Obenour | 4ed9df4 | 2022-12-30 19:30:58 -0500 | [diff] [blame] | 1065 | ret = spmc_validate_mtd_start(&obj->desc, ffa_version, |
| 1066 | fragment_length, obj->desc_size); |
| 1067 | if (ret != 0) { |
| 1068 | goto err_bad_desc; |
| 1069 | } |
| 1070 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1071 | obj->desc.handle = spmc_shmem_obj_state.next_handle++; |
| 1072 | obj->desc.flags |= mtd_flag; |
| 1073 | } |
| 1074 | |
| 1075 | obj->desc_filled += fragment_length; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1076 | |
| 1077 | handle_low = (uint32_t)obj->desc.handle; |
| 1078 | handle_high = obj->desc.handle >> 32; |
| 1079 | |
| 1080 | if (obj->desc_filled != obj->desc_size) { |
| 1081 | SMC_RET8(smc_handle, FFA_MEM_FRAG_RX, handle_low, |
| 1082 | handle_high, obj->desc_filled, |
| 1083 | (uint32_t)obj->desc.sender_id << 16, 0, 0, 0); |
| 1084 | } |
| 1085 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1086 | /* The full descriptor has been received, perform any final checks. */ |
| 1087 | |
Demi Marie Obenour | cdd3e72 | 2023-01-11 14:16:37 -0500 | [diff] [blame] | 1088 | ret = spmc_shmem_check_obj(obj, ffa_version); |
| 1089 | if (ret != 0) { |
Demi Marie Obenour | cdd3e72 | 2023-01-11 14:16:37 -0500 | [diff] [blame] | 1090 | goto err_bad_desc; |
| 1091 | } |
| 1092 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1093 | ret = spmc_shmem_check_state_obj(obj, ffa_version); |
Marc Bonnici | c31ec9e | 2022-01-21 10:34:55 +0000 | [diff] [blame] | 1094 | if (ret) { |
| 1095 | ERROR("%s: invalid memory region descriptor.\n", __func__); |
| 1096 | goto err_bad_desc; |
| 1097 | } |
| 1098 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1099 | /* |
| 1100 | * Everything checks out, if the sender was using FF-A v1.0, convert |
| 1101 | * the descriptor format to use the v1.1 structures. |
| 1102 | */ |
| 1103 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 1104 | struct spmc_shmem_obj *v1_1_obj; |
| 1105 | uint64_t mem_handle; |
| 1106 | |
| 1107 | /* Calculate the size that the v1.1 descriptor will required. */ |
Demi Marie Obenour | 81f0adc | 2023-01-12 14:28:32 -0500 | [diff] [blame] | 1108 | uint64_t v1_1_desc_size = |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1109 | spmc_shm_get_v1_1_descriptor_size((void *) &obj->desc, |
vallau01 | 46dbac2 | 2022-08-08 14:10:14 +0200 | [diff] [blame] | 1110 | obj->desc_size); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1111 | |
Demi Marie Obenour | 81f0adc | 2023-01-12 14:28:32 -0500 | [diff] [blame] | 1112 | if (v1_1_desc_size > UINT32_MAX) { |
| 1113 | ret = FFA_ERROR_NO_MEMORY; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1114 | goto err_arg; |
| 1115 | } |
| 1116 | |
| 1117 | /* Get a new obj to store the v1.1 descriptor. */ |
| 1118 | v1_1_obj = |
Demi Marie Obenour | 81f0adc | 2023-01-12 14:28:32 -0500 | [diff] [blame] | 1119 | spmc_shmem_obj_alloc(&spmc_shmem_obj_state, (size_t)v1_1_desc_size); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1120 | |
vallau01 | 8f83099 | 2022-08-09 18:03:28 +0200 | [diff] [blame] | 1121 | if (!v1_1_obj) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1122 | ret = FFA_ERROR_NO_MEMORY; |
| 1123 | goto err_arg; |
| 1124 | } |
| 1125 | |
| 1126 | /* Perform the conversion from v1.0 to v1.1. */ |
Demi Marie Obenour | 81f0adc | 2023-01-12 14:28:32 -0500 | [diff] [blame] | 1127 | v1_1_obj->desc_size = (uint32_t)v1_1_desc_size; |
| 1128 | v1_1_obj->desc_filled = (uint32_t)v1_1_desc_size; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1129 | if (!spmc_shm_convert_shmem_obj_from_v1_0(v1_1_obj, obj)) { |
| 1130 | ERROR("%s: Could not convert mtd!\n", __func__); |
| 1131 | spmc_shmem_obj_free(&spmc_shmem_obj_state, v1_1_obj); |
| 1132 | goto err_arg; |
| 1133 | } |
| 1134 | |
| 1135 | /* |
| 1136 | * We're finished with the v1.0 descriptor so free it |
| 1137 | * and continue our checks with the new v1.1 descriptor. |
| 1138 | */ |
| 1139 | mem_handle = obj->desc.handle; |
| 1140 | spmc_shmem_obj_free(&spmc_shmem_obj_state, obj); |
| 1141 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| 1142 | if (obj == NULL) { |
| 1143 | ERROR("%s: Failed to find converted descriptor.\n", |
| 1144 | __func__); |
| 1145 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1146 | return spmc_ffa_error_return(smc_handle, ret); |
| 1147 | } |
| 1148 | } |
| 1149 | |
Marc Bonnici | 503320e | 2022-02-21 15:02:36 +0000 | [diff] [blame] | 1150 | /* Allow for platform specific operations to be performed. */ |
| 1151 | ret = plat_spmc_shmem_begin(&obj->desc); |
| 1152 | if (ret != 0) { |
| 1153 | goto err_arg; |
| 1154 | } |
| 1155 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1156 | SMC_RET8(smc_handle, FFA_SUCCESS_SMC32, 0, handle_low, handle_high, 0, |
| 1157 | 0, 0, 0); |
| 1158 | |
| 1159 | err_bad_desc: |
| 1160 | err_arg: |
| 1161 | spmc_shmem_obj_free(&spmc_shmem_obj_state, obj); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1162 | return spmc_ffa_error_return(smc_handle, ret); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1163 | } |
| 1164 | |
| 1165 | /** |
| 1166 | * spmc_ffa_mem_send - FFA_MEM_SHARE/LEND implementation. |
| 1167 | * @client: Client state. |
| 1168 | * @total_length: Total length of shared memory descriptor. |
| 1169 | * @fragment_length: Length of fragment of shared memory descriptor passed in |
| 1170 | * this call. |
| 1171 | * @address: Not supported, must be 0. |
| 1172 | * @page_count: Not supported, must be 0. |
| 1173 | * @smc_handle: Handle passed to smc call. Used to return |
| 1174 | * FFA_MEM_FRAG_RX or SMC_FC_FFA_SUCCESS. |
| 1175 | * |
| 1176 | * Implements a subset of the FF-A FFA_MEM_SHARE and FFA_MEM_LEND calls needed |
| 1177 | * to share or lend memory from non-secure os to secure os (with no stream |
| 1178 | * endpoints). |
| 1179 | * |
| 1180 | * Return: 0 on success, error code on failure. |
| 1181 | */ |
| 1182 | long spmc_ffa_mem_send(uint32_t smc_fid, |
| 1183 | bool secure_origin, |
| 1184 | uint64_t total_length, |
| 1185 | uint32_t fragment_length, |
| 1186 | uint64_t address, |
| 1187 | uint32_t page_count, |
| 1188 | void *cookie, |
| 1189 | void *handle, |
| 1190 | uint64_t flags) |
| 1191 | |
| 1192 | { |
| 1193 | long ret; |
| 1194 | struct spmc_shmem_obj *obj; |
| 1195 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 1196 | ffa_mtd_flag32_t mtd_flag; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1197 | uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
Demi Marie Obenour | 1f9f830 | 2022-12-30 19:14:18 -0500 | [diff] [blame] | 1198 | size_t min_desc_size; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1199 | |
| 1200 | if (address != 0U || page_count != 0U) { |
| 1201 | WARN("%s: custom memory region for message not supported.\n", |
| 1202 | __func__); |
| 1203 | return spmc_ffa_error_return(handle, |
| 1204 | FFA_ERROR_INVALID_PARAMETER); |
| 1205 | } |
| 1206 | |
| 1207 | if (secure_origin) { |
| 1208 | WARN("%s: unsupported share direction.\n", __func__); |
| 1209 | return spmc_ffa_error_return(handle, |
| 1210 | FFA_ERROR_INVALID_PARAMETER); |
| 1211 | } |
| 1212 | |
Demi Marie Obenour | 1f9f830 | 2022-12-30 19:14:18 -0500 | [diff] [blame] | 1213 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 1214 | min_desc_size = sizeof(struct ffa_mtd_v1_0); |
| 1215 | } else if (ffa_version == MAKE_FFA_VERSION(1, 1)) { |
| 1216 | min_desc_size = sizeof(struct ffa_mtd); |
| 1217 | } else { |
| 1218 | WARN("%s: bad FF-A version.\n", __func__); |
| 1219 | return spmc_ffa_error_return(handle, |
| 1220 | FFA_ERROR_INVALID_PARAMETER); |
| 1221 | } |
| 1222 | |
| 1223 | /* Check if the descriptor is too small for the FF-A version. */ |
| 1224 | if (fragment_length < min_desc_size) { |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1225 | WARN("%s: bad first fragment size %u < %zu\n", |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1226 | __func__, fragment_length, sizeof(struct ffa_mtd_v1_0)); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1227 | return spmc_ffa_error_return(handle, |
| 1228 | FFA_ERROR_INVALID_PARAMETER); |
| 1229 | } |
| 1230 | |
| 1231 | if ((smc_fid & FUNCID_NUM_MASK) == FFA_FNUM_MEM_SHARE) { |
| 1232 | mtd_flag = FFA_MTD_FLAG_TYPE_SHARE_MEMORY; |
| 1233 | } else if ((smc_fid & FUNCID_NUM_MASK) == FFA_FNUM_MEM_LEND) { |
| 1234 | mtd_flag = FFA_MTD_FLAG_TYPE_LEND_MEMORY; |
| 1235 | } else { |
| 1236 | WARN("%s: invalid memory management operation.\n", __func__); |
| 1237 | return spmc_ffa_error_return(handle, |
| 1238 | FFA_ERROR_INVALID_PARAMETER); |
| 1239 | } |
| 1240 | |
| 1241 | spin_lock(&spmc_shmem_obj_state.lock); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1242 | obj = spmc_shmem_obj_alloc(&spmc_shmem_obj_state, total_length); |
| 1243 | if (obj == NULL) { |
| 1244 | ret = FFA_ERROR_NO_MEMORY; |
| 1245 | goto err_unlock; |
| 1246 | } |
| 1247 | |
| 1248 | spin_lock(&mbox->lock); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1249 | ret = spmc_ffa_fill_desc(mbox, obj, fragment_length, mtd_flag, |
| 1250 | ffa_version, handle); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1251 | spin_unlock(&mbox->lock); |
| 1252 | |
| 1253 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1254 | return ret; |
| 1255 | |
| 1256 | err_unlock: |
| 1257 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1258 | return spmc_ffa_error_return(handle, ret); |
| 1259 | } |
| 1260 | |
| 1261 | /** |
| 1262 | * spmc_ffa_mem_frag_tx - FFA_MEM_FRAG_TX implementation. |
| 1263 | * @client: Client state. |
| 1264 | * @handle_low: Handle_low value returned from FFA_MEM_FRAG_RX. |
| 1265 | * @handle_high: Handle_high value returned from FFA_MEM_FRAG_RX. |
| 1266 | * @fragment_length: Length of fragments transmitted. |
| 1267 | * @sender_id: Vmid of sender in bits [31:16] |
| 1268 | * @smc_handle: Handle passed to smc call. Used to return |
| 1269 | * FFA_MEM_FRAG_RX or SMC_FC_FFA_SUCCESS. |
| 1270 | * |
| 1271 | * Return: @smc_handle on success, error code on failure. |
| 1272 | */ |
| 1273 | long spmc_ffa_mem_frag_tx(uint32_t smc_fid, |
| 1274 | bool secure_origin, |
| 1275 | uint64_t handle_low, |
| 1276 | uint64_t handle_high, |
| 1277 | uint32_t fragment_length, |
| 1278 | uint32_t sender_id, |
| 1279 | void *cookie, |
| 1280 | void *handle, |
| 1281 | uint64_t flags) |
| 1282 | { |
| 1283 | long ret; |
| 1284 | uint32_t desc_sender_id; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1285 | uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1286 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 1287 | |
| 1288 | struct spmc_shmem_obj *obj; |
| 1289 | uint64_t mem_handle = handle_low | (((uint64_t)handle_high) << 32); |
| 1290 | |
| 1291 | spin_lock(&spmc_shmem_obj_state.lock); |
| 1292 | |
| 1293 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| 1294 | if (obj == NULL) { |
| 1295 | WARN("%s: invalid handle, 0x%lx, not a valid handle.\n", |
| 1296 | __func__, mem_handle); |
| 1297 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1298 | goto err_unlock; |
| 1299 | } |
| 1300 | |
| 1301 | desc_sender_id = (uint32_t)obj->desc.sender_id << 16; |
| 1302 | if (sender_id != desc_sender_id) { |
| 1303 | WARN("%s: invalid sender_id 0x%x != 0x%x\n", __func__, |
| 1304 | sender_id, desc_sender_id); |
| 1305 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1306 | goto err_unlock; |
| 1307 | } |
| 1308 | |
| 1309 | if (obj->desc_filled == obj->desc_size) { |
| 1310 | WARN("%s: object desc already filled, %zu\n", __func__, |
| 1311 | obj->desc_filled); |
| 1312 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1313 | goto err_unlock; |
| 1314 | } |
| 1315 | |
| 1316 | spin_lock(&mbox->lock); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1317 | ret = spmc_ffa_fill_desc(mbox, obj, fragment_length, 0, ffa_version, |
| 1318 | handle); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1319 | spin_unlock(&mbox->lock); |
| 1320 | |
| 1321 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1322 | return ret; |
| 1323 | |
| 1324 | err_unlock: |
| 1325 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1326 | return spmc_ffa_error_return(handle, ret); |
| 1327 | } |
| 1328 | |
| 1329 | /** |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1330 | * spmc_ffa_mem_retrieve_set_ns_bit - Set the NS bit in the response descriptor |
| 1331 | * if the caller implements a version greater |
| 1332 | * than FF-A 1.0 or if they have requested |
| 1333 | * the functionality. |
| 1334 | * TODO: We are assuming that the caller is |
| 1335 | * an SP. To support retrieval from the |
| 1336 | * normal world this function will need to be |
| 1337 | * expanded accordingly. |
| 1338 | * @resp: Descriptor populated in callers RX buffer. |
| 1339 | * @sp_ctx: Context of the calling SP. |
| 1340 | */ |
| 1341 | void spmc_ffa_mem_retrieve_set_ns_bit(struct ffa_mtd *resp, |
| 1342 | struct secure_partition_desc *sp_ctx) |
| 1343 | { |
| 1344 | if (sp_ctx->ffa_version > MAKE_FFA_VERSION(1, 0) || |
| 1345 | sp_ctx->ns_bit_requested) { |
| 1346 | /* |
| 1347 | * Currently memory senders must reside in the normal |
| 1348 | * world, and we do not have the functionlaity to change |
| 1349 | * the state of memory dynamically. Therefore we can always set |
| 1350 | * the NS bit to 1. |
| 1351 | */ |
| 1352 | resp->memory_region_attributes |= FFA_MEM_ATTR_NS_BIT; |
| 1353 | } |
| 1354 | } |
| 1355 | |
| 1356 | /** |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1357 | * spmc_ffa_mem_retrieve_req - FFA_MEM_RETRIEVE_REQ implementation. |
| 1358 | * @smc_fid: FID of SMC |
| 1359 | * @total_length: Total length of retrieve request descriptor if this is |
| 1360 | * the first call. Otherwise (unsupported) must be 0. |
| 1361 | * @fragment_length: Length of fragment of retrieve request descriptor passed |
| 1362 | * in this call. Only @fragment_length == @length is |
| 1363 | * supported by this implementation. |
| 1364 | * @address: Not supported, must be 0. |
| 1365 | * @page_count: Not supported, must be 0. |
| 1366 | * @smc_handle: Handle passed to smc call. Used to return |
| 1367 | * FFA_MEM_RETRIEVE_RESP. |
| 1368 | * |
| 1369 | * Implements a subset of the FF-A FFA_MEM_RETRIEVE_REQ call. |
| 1370 | * Used by secure os to retrieve memory already shared by non-secure os. |
| 1371 | * If the data does not fit in a single FFA_MEM_RETRIEVE_RESP message, |
| 1372 | * the client must call FFA_MEM_FRAG_RX until the full response has been |
| 1373 | * received. |
| 1374 | * |
| 1375 | * Return: @handle on success, error code on failure. |
| 1376 | */ |
| 1377 | long |
| 1378 | spmc_ffa_mem_retrieve_req(uint32_t smc_fid, |
| 1379 | bool secure_origin, |
| 1380 | uint32_t total_length, |
| 1381 | uint32_t fragment_length, |
| 1382 | uint64_t address, |
| 1383 | uint32_t page_count, |
| 1384 | void *cookie, |
| 1385 | void *handle, |
| 1386 | uint64_t flags) |
| 1387 | { |
| 1388 | int ret; |
| 1389 | size_t buf_size; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1390 | size_t copy_size = 0; |
| 1391 | size_t min_desc_size; |
| 1392 | size_t out_desc_size = 0; |
| 1393 | |
| 1394 | /* |
| 1395 | * Currently we are only accessing fields that are the same in both the |
| 1396 | * v1.0 and v1.1 mtd struct therefore we can use a v1.1 struct directly |
| 1397 | * here. We only need validate against the appropriate struct size. |
| 1398 | */ |
| 1399 | struct ffa_mtd *resp; |
| 1400 | const struct ffa_mtd *req; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1401 | struct spmc_shmem_obj *obj = NULL; |
| 1402 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1403 | uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1404 | struct secure_partition_desc *sp_ctx = spmc_get_current_sp_ctx(); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1405 | |
| 1406 | if (!secure_origin) { |
| 1407 | WARN("%s: unsupported retrieve req direction.\n", __func__); |
| 1408 | return spmc_ffa_error_return(handle, |
| 1409 | FFA_ERROR_INVALID_PARAMETER); |
| 1410 | } |
| 1411 | |
| 1412 | if (address != 0U || page_count != 0U) { |
| 1413 | WARN("%s: custom memory region not supported.\n", __func__); |
| 1414 | return spmc_ffa_error_return(handle, |
| 1415 | FFA_ERROR_INVALID_PARAMETER); |
| 1416 | } |
| 1417 | |
| 1418 | spin_lock(&mbox->lock); |
| 1419 | |
| 1420 | req = mbox->tx_buffer; |
| 1421 | resp = mbox->rx_buffer; |
| 1422 | buf_size = mbox->rxtx_page_count * FFA_PAGE_SIZE; |
| 1423 | |
| 1424 | if (mbox->rxtx_page_count == 0U) { |
| 1425 | WARN("%s: buffer pair not registered.\n", __func__); |
| 1426 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1427 | goto err_unlock_mailbox; |
| 1428 | } |
| 1429 | |
| 1430 | if (mbox->state != MAILBOX_STATE_EMPTY) { |
| 1431 | WARN("%s: RX Buffer is full! %d\n", __func__, mbox->state); |
| 1432 | ret = FFA_ERROR_DENIED; |
| 1433 | goto err_unlock_mailbox; |
| 1434 | } |
| 1435 | |
| 1436 | if (fragment_length != total_length) { |
| 1437 | WARN("%s: fragmented retrieve request not supported.\n", |
| 1438 | __func__); |
| 1439 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1440 | goto err_unlock_mailbox; |
| 1441 | } |
| 1442 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1443 | if (req->emad_count == 0U) { |
| 1444 | WARN("%s: unsupported attribute desc count %u.\n", |
| 1445 | __func__, obj->desc.emad_count); |
vallau01 | 460d396 | 2022-08-09 17:06:53 +0200 | [diff] [blame] | 1446 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1447 | goto err_unlock_mailbox; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1448 | } |
| 1449 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1450 | /* Determine the appropriate minimum descriptor size. */ |
| 1451 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 1452 | min_desc_size = sizeof(struct ffa_mtd_v1_0); |
| 1453 | } else { |
| 1454 | min_desc_size = sizeof(struct ffa_mtd); |
| 1455 | } |
| 1456 | if (total_length < min_desc_size) { |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1457 | WARN("%s: invalid length %u < %zu\n", __func__, total_length, |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1458 | min_desc_size); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1459 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1460 | goto err_unlock_mailbox; |
| 1461 | } |
| 1462 | |
| 1463 | spin_lock(&spmc_shmem_obj_state.lock); |
| 1464 | |
| 1465 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, req->handle); |
| 1466 | if (obj == NULL) { |
| 1467 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1468 | goto err_unlock_all; |
| 1469 | } |
| 1470 | |
| 1471 | if (obj->desc_filled != obj->desc_size) { |
| 1472 | WARN("%s: incomplete object desc filled %zu < size %zu\n", |
| 1473 | __func__, obj->desc_filled, obj->desc_size); |
| 1474 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1475 | goto err_unlock_all; |
| 1476 | } |
| 1477 | |
| 1478 | if (req->emad_count != 0U && req->sender_id != obj->desc.sender_id) { |
| 1479 | WARN("%s: wrong sender id 0x%x != 0x%x\n", |
| 1480 | __func__, req->sender_id, obj->desc.sender_id); |
| 1481 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1482 | goto err_unlock_all; |
| 1483 | } |
| 1484 | |
| 1485 | if (req->emad_count != 0U && req->tag != obj->desc.tag) { |
| 1486 | WARN("%s: wrong tag 0x%lx != 0x%lx\n", |
| 1487 | __func__, req->tag, obj->desc.tag); |
| 1488 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1489 | goto err_unlock_all; |
| 1490 | } |
| 1491 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1492 | if (req->emad_count != 0U && req->emad_count != obj->desc.emad_count) { |
| 1493 | WARN("%s: mistmatch of endpoint counts %u != %u\n", |
| 1494 | __func__, req->emad_count, obj->desc.emad_count); |
| 1495 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1496 | goto err_unlock_all; |
| 1497 | } |
| 1498 | |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1499 | /* Ensure the NS bit is set to 0 in the request. */ |
| 1500 | if ((req->memory_region_attributes & FFA_MEM_ATTR_NS_BIT) != 0U) { |
| 1501 | WARN("%s: NS mem attributes flags MBZ.\n", __func__); |
| 1502 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1503 | goto err_unlock_all; |
| 1504 | } |
| 1505 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1506 | if (req->flags != 0U) { |
| 1507 | if ((req->flags & FFA_MTD_FLAG_TYPE_MASK) != |
| 1508 | (obj->desc.flags & FFA_MTD_FLAG_TYPE_MASK)) { |
| 1509 | /* |
| 1510 | * If the retrieve request specifies the memory |
| 1511 | * transaction ensure it matches what we expect. |
| 1512 | */ |
| 1513 | WARN("%s: wrong mem transaction flags %x != %x\n", |
| 1514 | __func__, req->flags, obj->desc.flags); |
| 1515 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1516 | goto err_unlock_all; |
| 1517 | } |
| 1518 | |
| 1519 | if (req->flags != FFA_MTD_FLAG_TYPE_SHARE_MEMORY && |
| 1520 | req->flags != FFA_MTD_FLAG_TYPE_LEND_MEMORY) { |
| 1521 | /* |
| 1522 | * Current implementation does not support donate and |
| 1523 | * it supports no other flags. |
| 1524 | */ |
| 1525 | WARN("%s: invalid flags 0x%x\n", __func__, req->flags); |
| 1526 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1527 | goto err_unlock_all; |
| 1528 | } |
| 1529 | } |
| 1530 | |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1531 | /* Validate the caller is a valid participant. */ |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 1532 | if (!spmc_shmem_obj_validate_id(obj, sp_ctx->sp_id)) { |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1533 | WARN("%s: Invalid endpoint ID (0x%x).\n", |
| 1534 | __func__, sp_ctx->sp_id); |
| 1535 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1536 | goto err_unlock_all; |
| 1537 | } |
| 1538 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1539 | /* Validate that the provided emad offset and structure is valid.*/ |
| 1540 | for (size_t i = 0; i < req->emad_count; i++) { |
| 1541 | size_t emad_size; |
| 1542 | struct ffa_emad_v1_0 *emad; |
| 1543 | |
| 1544 | emad = spmc_shmem_obj_get_emad(req, i, ffa_version, |
| 1545 | &emad_size); |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1546 | |
| 1547 | if ((uintptr_t) emad >= (uintptr_t) |
| 1548 | ((uint8_t *) req + total_length)) { |
| 1549 | WARN("Invalid emad access.\n"); |
| 1550 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1551 | goto err_unlock_all; |
| 1552 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1553 | } |
| 1554 | |
| 1555 | /* |
| 1556 | * Validate all the endpoints match in the case of multiple |
| 1557 | * borrowers. We don't mandate that the order of the borrowers |
| 1558 | * must match in the descriptors therefore check to see if the |
| 1559 | * endpoints match in any order. |
| 1560 | */ |
| 1561 | for (size_t i = 0; i < req->emad_count; i++) { |
| 1562 | bool found = false; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1563 | size_t emad_size; |
| 1564 | struct ffa_emad_v1_0 *emad; |
| 1565 | struct ffa_emad_v1_0 *other_emad; |
| 1566 | |
| 1567 | emad = spmc_shmem_obj_get_emad(req, i, ffa_version, |
| 1568 | &emad_size); |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1569 | |
| 1570 | for (size_t j = 0; j < obj->desc.emad_count; j++) { |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1571 | other_emad = spmc_shmem_obj_get_emad( |
| 1572 | &obj->desc, j, MAKE_FFA_VERSION(1, 1), |
| 1573 | &emad_size); |
| 1574 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1575 | if (req->emad_count && |
| 1576 | emad->mapd.endpoint_id == |
| 1577 | other_emad->mapd.endpoint_id) { |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1578 | found = true; |
| 1579 | break; |
| 1580 | } |
| 1581 | } |
| 1582 | |
| 1583 | if (!found) { |
| 1584 | WARN("%s: invalid receiver id (0x%x).\n", |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1585 | __func__, emad->mapd.endpoint_id); |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1586 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1587 | goto err_unlock_all; |
| 1588 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1589 | } |
| 1590 | |
| 1591 | mbox->state = MAILBOX_STATE_FULL; |
| 1592 | |
| 1593 | if (req->emad_count != 0U) { |
| 1594 | obj->in_use++; |
| 1595 | } |
| 1596 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1597 | /* |
| 1598 | * If the caller is v1.0 convert the descriptor, otherwise copy |
| 1599 | * directly. |
| 1600 | */ |
| 1601 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 1602 | ret = spmc_populate_ffa_v1_0_descriptor(resp, obj, buf_size, 0, |
| 1603 | ©_size, |
| 1604 | &out_desc_size); |
| 1605 | if (ret != 0U) { |
| 1606 | ERROR("%s: Failed to process descriptor.\n", __func__); |
| 1607 | goto err_unlock_all; |
| 1608 | } |
| 1609 | } else { |
| 1610 | copy_size = MIN(obj->desc_size, buf_size); |
| 1611 | out_desc_size = obj->desc_size; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1612 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1613 | memcpy(resp, &obj->desc, copy_size); |
| 1614 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1615 | |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1616 | /* Set the NS bit in the response if applicable. */ |
| 1617 | spmc_ffa_mem_retrieve_set_ns_bit(resp, sp_ctx); |
| 1618 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1619 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1620 | spin_unlock(&mbox->lock); |
| 1621 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1622 | SMC_RET8(handle, FFA_MEM_RETRIEVE_RESP, out_desc_size, |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1623 | copy_size, 0, 0, 0, 0, 0); |
| 1624 | |
| 1625 | err_unlock_all: |
| 1626 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1627 | err_unlock_mailbox: |
| 1628 | spin_unlock(&mbox->lock); |
| 1629 | return spmc_ffa_error_return(handle, ret); |
| 1630 | } |
| 1631 | |
| 1632 | /** |
| 1633 | * spmc_ffa_mem_frag_rx - FFA_MEM_FRAG_RX implementation. |
| 1634 | * @client: Client state. |
| 1635 | * @handle_low: Handle passed to &FFA_MEM_RETRIEVE_REQ. Bit[31:0]. |
| 1636 | * @handle_high: Handle passed to &FFA_MEM_RETRIEVE_REQ. Bit[63:32]. |
| 1637 | * @fragment_offset: Byte offset in descriptor to resume at. |
| 1638 | * @sender_id: Bit[31:16]: Endpoint id of sender if client is a |
| 1639 | * hypervisor. 0 otherwise. |
| 1640 | * @smc_handle: Handle passed to smc call. Used to return |
| 1641 | * FFA_MEM_FRAG_TX. |
| 1642 | * |
| 1643 | * Return: @smc_handle on success, error code on failure. |
| 1644 | */ |
| 1645 | long spmc_ffa_mem_frag_rx(uint32_t smc_fid, |
| 1646 | bool secure_origin, |
| 1647 | uint32_t handle_low, |
| 1648 | uint32_t handle_high, |
| 1649 | uint32_t fragment_offset, |
| 1650 | uint32_t sender_id, |
| 1651 | void *cookie, |
| 1652 | void *handle, |
| 1653 | uint64_t flags) |
| 1654 | { |
| 1655 | int ret; |
| 1656 | void *src; |
| 1657 | size_t buf_size; |
| 1658 | size_t copy_size; |
| 1659 | size_t full_copy_size; |
| 1660 | uint32_t desc_sender_id; |
| 1661 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 1662 | uint64_t mem_handle = handle_low | (((uint64_t)handle_high) << 32); |
| 1663 | struct spmc_shmem_obj *obj; |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1664 | uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1665 | |
| 1666 | if (!secure_origin) { |
| 1667 | WARN("%s: can only be called from swld.\n", |
| 1668 | __func__); |
| 1669 | return spmc_ffa_error_return(handle, |
| 1670 | FFA_ERROR_INVALID_PARAMETER); |
| 1671 | } |
| 1672 | |
| 1673 | spin_lock(&spmc_shmem_obj_state.lock); |
| 1674 | |
| 1675 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| 1676 | if (obj == NULL) { |
| 1677 | WARN("%s: invalid handle, 0x%lx, not a valid handle.\n", |
| 1678 | __func__, mem_handle); |
| 1679 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1680 | goto err_unlock_shmem; |
| 1681 | } |
| 1682 | |
| 1683 | desc_sender_id = (uint32_t)obj->desc.sender_id << 16; |
| 1684 | if (sender_id != 0U && sender_id != desc_sender_id) { |
| 1685 | WARN("%s: invalid sender_id 0x%x != 0x%x\n", __func__, |
| 1686 | sender_id, desc_sender_id); |
| 1687 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1688 | goto err_unlock_shmem; |
| 1689 | } |
| 1690 | |
| 1691 | if (fragment_offset >= obj->desc_size) { |
| 1692 | WARN("%s: invalid fragment_offset 0x%x >= 0x%zx\n", |
| 1693 | __func__, fragment_offset, obj->desc_size); |
| 1694 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1695 | goto err_unlock_shmem; |
| 1696 | } |
| 1697 | |
| 1698 | spin_lock(&mbox->lock); |
| 1699 | |
| 1700 | if (mbox->rxtx_page_count == 0U) { |
| 1701 | WARN("%s: buffer pair not registered.\n", __func__); |
| 1702 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1703 | goto err_unlock_all; |
| 1704 | } |
| 1705 | |
| 1706 | if (mbox->state != MAILBOX_STATE_EMPTY) { |
| 1707 | WARN("%s: RX Buffer is full!\n", __func__); |
| 1708 | ret = FFA_ERROR_DENIED; |
| 1709 | goto err_unlock_all; |
| 1710 | } |
| 1711 | |
| 1712 | buf_size = mbox->rxtx_page_count * FFA_PAGE_SIZE; |
| 1713 | |
| 1714 | mbox->state = MAILBOX_STATE_FULL; |
| 1715 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1716 | /* |
| 1717 | * If the caller is v1.0 convert the descriptor, otherwise copy |
| 1718 | * directly. |
| 1719 | */ |
| 1720 | if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| 1721 | size_t out_desc_size; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1722 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1723 | ret = spmc_populate_ffa_v1_0_descriptor(mbox->rx_buffer, obj, |
| 1724 | buf_size, |
| 1725 | fragment_offset, |
| 1726 | ©_size, |
| 1727 | &out_desc_size); |
| 1728 | if (ret != 0U) { |
| 1729 | ERROR("%s: Failed to process descriptor.\n", __func__); |
| 1730 | goto err_unlock_all; |
| 1731 | } |
| 1732 | } else { |
| 1733 | full_copy_size = obj->desc_size - fragment_offset; |
| 1734 | copy_size = MIN(full_copy_size, buf_size); |
| 1735 | |
| 1736 | src = &obj->desc; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1737 | |
Marc Bonnici | d1907f0 | 2022-04-19 17:42:53 +0100 | [diff] [blame] | 1738 | memcpy(mbox->rx_buffer, src + fragment_offset, copy_size); |
| 1739 | } |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1740 | |
| 1741 | spin_unlock(&mbox->lock); |
| 1742 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1743 | |
| 1744 | SMC_RET8(handle, FFA_MEM_FRAG_TX, handle_low, handle_high, |
| 1745 | copy_size, sender_id, 0, 0, 0); |
| 1746 | |
| 1747 | err_unlock_all: |
| 1748 | spin_unlock(&mbox->lock); |
| 1749 | err_unlock_shmem: |
| 1750 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1751 | return spmc_ffa_error_return(handle, ret); |
| 1752 | } |
| 1753 | |
| 1754 | /** |
| 1755 | * spmc_ffa_mem_relinquish - FFA_MEM_RELINQUISH implementation. |
| 1756 | * @client: Client state. |
| 1757 | * |
| 1758 | * Implements a subset of the FF-A FFA_MEM_RELINQUISH call. |
| 1759 | * Used by secure os release previously shared memory to non-secure os. |
| 1760 | * |
| 1761 | * The handle to release must be in the client's (secure os's) transmit buffer. |
| 1762 | * |
| 1763 | * Return: 0 on success, error code on failure. |
| 1764 | */ |
| 1765 | int spmc_ffa_mem_relinquish(uint32_t smc_fid, |
| 1766 | bool secure_origin, |
| 1767 | uint32_t handle_low, |
| 1768 | uint32_t handle_high, |
| 1769 | uint32_t fragment_offset, |
| 1770 | uint32_t sender_id, |
| 1771 | void *cookie, |
| 1772 | void *handle, |
| 1773 | uint64_t flags) |
| 1774 | { |
| 1775 | int ret; |
| 1776 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 1777 | struct spmc_shmem_obj *obj; |
| 1778 | const struct ffa_mem_relinquish_descriptor *req; |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1779 | struct secure_partition_desc *sp_ctx = spmc_get_current_sp_ctx(); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1780 | |
| 1781 | if (!secure_origin) { |
| 1782 | WARN("%s: unsupported relinquish direction.\n", __func__); |
| 1783 | return spmc_ffa_error_return(handle, |
| 1784 | FFA_ERROR_INVALID_PARAMETER); |
| 1785 | } |
| 1786 | |
| 1787 | spin_lock(&mbox->lock); |
| 1788 | |
| 1789 | if (mbox->rxtx_page_count == 0U) { |
| 1790 | WARN("%s: buffer pair not registered.\n", __func__); |
| 1791 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1792 | goto err_unlock_mailbox; |
| 1793 | } |
| 1794 | |
| 1795 | req = mbox->tx_buffer; |
| 1796 | |
| 1797 | if (req->flags != 0U) { |
| 1798 | WARN("%s: unsupported flags 0x%x\n", __func__, req->flags); |
| 1799 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1800 | goto err_unlock_mailbox; |
| 1801 | } |
| 1802 | |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1803 | if (req->endpoint_count == 0) { |
| 1804 | WARN("%s: endpoint count cannot be 0.\n", __func__); |
| 1805 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1806 | goto err_unlock_mailbox; |
| 1807 | } |
| 1808 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1809 | spin_lock(&spmc_shmem_obj_state.lock); |
| 1810 | |
| 1811 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, req->handle); |
| 1812 | if (obj == NULL) { |
| 1813 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1814 | goto err_unlock_all; |
| 1815 | } |
| 1816 | |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1817 | /* |
| 1818 | * Validate the endpoint ID was populated correctly. We don't currently |
| 1819 | * support proxy endpoints so the endpoint count should always be 1. |
| 1820 | */ |
| 1821 | if (req->endpoint_count != 1U) { |
| 1822 | WARN("%s: unsupported endpoint count %u != 1\n", __func__, |
| 1823 | req->endpoint_count); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1824 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1825 | goto err_unlock_all; |
| 1826 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1827 | |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1828 | /* Validate provided endpoint ID matches the partition ID. */ |
| 1829 | if (req->endpoint_array[0] != sp_ctx->sp_id) { |
| 1830 | WARN("%s: invalid endpoint ID %u != %u\n", __func__, |
| 1831 | req->endpoint_array[0], sp_ctx->sp_id); |
| 1832 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1833 | goto err_unlock_all; |
| 1834 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1835 | |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1836 | /* Validate the caller is a valid participant. */ |
Shruti Gupta | 20ce06c | 2022-08-25 14:22:53 +0100 | [diff] [blame] | 1837 | if (!spmc_shmem_obj_validate_id(obj, sp_ctx->sp_id)) { |
Marc Bonnici | 9bdcb74 | 2022-06-06 14:37:57 +0100 | [diff] [blame] | 1838 | WARN("%s: Invalid endpoint ID (0x%x).\n", |
| 1839 | __func__, req->endpoint_array[0]); |
| 1840 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1841 | goto err_unlock_all; |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1842 | } |
Marc Bonnici | 336630f | 2022-01-13 11:39:10 +0000 | [diff] [blame] | 1843 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1844 | if (obj->in_use == 0U) { |
| 1845 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1846 | goto err_unlock_all; |
| 1847 | } |
| 1848 | obj->in_use--; |
| 1849 | |
| 1850 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1851 | spin_unlock(&mbox->lock); |
| 1852 | |
| 1853 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1854 | |
| 1855 | err_unlock_all: |
| 1856 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1857 | err_unlock_mailbox: |
| 1858 | spin_unlock(&mbox->lock); |
| 1859 | return spmc_ffa_error_return(handle, ret); |
| 1860 | } |
| 1861 | |
| 1862 | /** |
| 1863 | * spmc_ffa_mem_reclaim - FFA_MEM_RECLAIM implementation. |
| 1864 | * @client: Client state. |
| 1865 | * @handle_low: Unique handle of shared memory object to reclaim. Bit[31:0]. |
| 1866 | * @handle_high: Unique handle of shared memory object to reclaim. |
| 1867 | * Bit[63:32]. |
| 1868 | * @flags: Unsupported, ignored. |
| 1869 | * |
| 1870 | * Implements a subset of the FF-A FFA_MEM_RECLAIM call. |
| 1871 | * Used by non-secure os reclaim memory previously shared with secure os. |
| 1872 | * |
| 1873 | * Return: 0 on success, error code on failure. |
| 1874 | */ |
| 1875 | int spmc_ffa_mem_reclaim(uint32_t smc_fid, |
| 1876 | bool secure_origin, |
| 1877 | uint32_t handle_low, |
| 1878 | uint32_t handle_high, |
| 1879 | uint32_t mem_flags, |
| 1880 | uint64_t x4, |
| 1881 | void *cookie, |
| 1882 | void *handle, |
| 1883 | uint64_t flags) |
| 1884 | { |
| 1885 | int ret; |
| 1886 | struct spmc_shmem_obj *obj; |
| 1887 | uint64_t mem_handle = handle_low | (((uint64_t)handle_high) << 32); |
| 1888 | |
| 1889 | if (secure_origin) { |
| 1890 | WARN("%s: unsupported reclaim direction.\n", __func__); |
| 1891 | return spmc_ffa_error_return(handle, |
| 1892 | FFA_ERROR_INVALID_PARAMETER); |
| 1893 | } |
| 1894 | |
| 1895 | if (mem_flags != 0U) { |
| 1896 | WARN("%s: unsupported flags 0x%x\n", __func__, mem_flags); |
| 1897 | return spmc_ffa_error_return(handle, |
| 1898 | FFA_ERROR_INVALID_PARAMETER); |
| 1899 | } |
| 1900 | |
| 1901 | spin_lock(&spmc_shmem_obj_state.lock); |
| 1902 | |
| 1903 | obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| 1904 | if (obj == NULL) { |
| 1905 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1906 | goto err_unlock; |
| 1907 | } |
| 1908 | if (obj->in_use != 0U) { |
| 1909 | ret = FFA_ERROR_DENIED; |
| 1910 | goto err_unlock; |
| 1911 | } |
Marc Bonnici | 503320e | 2022-02-21 15:02:36 +0000 | [diff] [blame] | 1912 | |
Marc Bonnici | 82e28f1 | 2022-10-18 13:39:48 +0100 | [diff] [blame] | 1913 | if (obj->desc_filled != obj->desc_size) { |
| 1914 | WARN("%s: incomplete object desc filled %zu < size %zu\n", |
| 1915 | __func__, obj->desc_filled, obj->desc_size); |
| 1916 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1917 | goto err_unlock; |
| 1918 | } |
| 1919 | |
Marc Bonnici | 503320e | 2022-02-21 15:02:36 +0000 | [diff] [blame] | 1920 | /* Allow for platform specific operations to be performed. */ |
| 1921 | ret = plat_spmc_shmem_reclaim(&obj->desc); |
| 1922 | if (ret != 0) { |
| 1923 | goto err_unlock; |
| 1924 | } |
| 1925 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1926 | spmc_shmem_obj_free(&spmc_shmem_obj_state, obj); |
| 1927 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1928 | |
| 1929 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1930 | |
| 1931 | err_unlock: |
| 1932 | spin_unlock(&spmc_shmem_obj_state.lock); |
| 1933 | return spmc_ffa_error_return(handle, ret); |
| 1934 | } |