| /* |
| * Copyright (c) 2022-2023, ARM Limited and Contributors. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| #include <assert.h> |
| #include <errno.h> |
| #include <inttypes.h> |
| |
| #include <common/debug.h> |
| #include <common/runtime_svc.h> |
| #include <lib/object_pool.h> |
| #include <lib/spinlock.h> |
| #include <lib/xlat_tables/xlat_tables_v2.h> |
| #include <services/ffa_svc.h> |
| #include "spmc.h" |
| #include "spmc_shared_mem.h" |
| |
| #include <platform_def.h> |
| |
| /** |
| * struct spmc_shmem_obj - Shared memory object. |
| * @desc_size: Size of @desc. |
| * @desc_filled: Size of @desc already received. |
| * @in_use: Number of clients that have called ffa_mem_retrieve_req |
| * without a matching ffa_mem_relinquish call. |
| * @desc: FF-A memory region descriptor passed in ffa_mem_share. |
| */ |
| struct spmc_shmem_obj { |
| size_t desc_size; |
| size_t desc_filled; |
| size_t in_use; |
| struct ffa_mtd desc; |
| }; |
| |
| /* |
| * Declare our data structure to store the metadata of memory share requests. |
| * The main datastore is allocated on a per platform basis to ensure enough |
| * storage can be made available. |
| * The address of the data store will be populated by the SPMC during its |
| * initialization. |
| */ |
| |
| struct spmc_shmem_obj_state spmc_shmem_obj_state = { |
| /* Set start value for handle so top 32 bits are needed quickly. */ |
| .next_handle = 0xffffffc0U, |
| }; |
| |
| /** |
| * spmc_shmem_obj_size - Convert from descriptor size to object size. |
| * @desc_size: Size of struct ffa_memory_region_descriptor object. |
| * |
| * Return: Size of struct spmc_shmem_obj object. |
| */ |
| static size_t spmc_shmem_obj_size(size_t desc_size) |
| { |
| return desc_size + offsetof(struct spmc_shmem_obj, desc); |
| } |
| |
| /** |
| * spmc_shmem_obj_alloc - Allocate struct spmc_shmem_obj. |
| * @state: Global state. |
| * @desc_size: Size of struct ffa_memory_region_descriptor object that |
| * allocated object will hold. |
| * |
| * Return: Pointer to newly allocated object, or %NULL if there not enough space |
| * left. The returned pointer is only valid while @state is locked, to |
| * used it again after unlocking @state, spmc_shmem_obj_lookup must be |
| * called. |
| */ |
| static struct spmc_shmem_obj * |
| spmc_shmem_obj_alloc(struct spmc_shmem_obj_state *state, size_t desc_size) |
| { |
| struct spmc_shmem_obj *obj; |
| size_t free = state->data_size - state->allocated; |
| size_t obj_size; |
| |
| if (state->data == NULL) { |
| ERROR("Missing shmem datastore!\n"); |
| return NULL; |
| } |
| |
| /* Ensure that descriptor size is aligned */ |
| if (!is_aligned(desc_size, 16)) { |
| WARN("%s(0x%zx) desc_size not 16-byte aligned\n", |
| __func__, desc_size); |
| return NULL; |
| } |
| |
| obj_size = spmc_shmem_obj_size(desc_size); |
| |
| /* Ensure the obj size has not overflowed. */ |
| if (obj_size < desc_size) { |
| WARN("%s(0x%zx) desc_size overflow\n", |
| __func__, desc_size); |
| return NULL; |
| } |
| |
| if (obj_size > free) { |
| WARN("%s(0x%zx) failed, free 0x%zx\n", |
| __func__, desc_size, free); |
| return NULL; |
| } |
| obj = (struct spmc_shmem_obj *)(state->data + state->allocated); |
| obj->desc = (struct ffa_mtd) {0}; |
| obj->desc_size = desc_size; |
| obj->desc_filled = 0; |
| obj->in_use = 0; |
| state->allocated += obj_size; |
| return obj; |
| } |
| |
| /** |
| * spmc_shmem_obj_free - Free struct spmc_shmem_obj. |
| * @state: Global state. |
| * @obj: Object to free. |
| * |
| * Release memory used by @obj. Other objects may move, so on return all |
| * pointers to struct spmc_shmem_obj object should be considered invalid, not |
| * just @obj. |
| * |
| * The current implementation always compacts the remaining objects to simplify |
| * the allocator and to avoid fragmentation. |
| */ |
| |
| static void spmc_shmem_obj_free(struct spmc_shmem_obj_state *state, |
| struct spmc_shmem_obj *obj) |
| { |
| size_t free_size = spmc_shmem_obj_size(obj->desc_size); |
| uint8_t *shift_dest = (uint8_t *)obj; |
| uint8_t *shift_src = shift_dest + free_size; |
| size_t shift_size = state->allocated - (shift_src - state->data); |
| |
| if (shift_size != 0U) { |
| memmove(shift_dest, shift_src, shift_size); |
| } |
| state->allocated -= free_size; |
| } |
| |
| /** |
| * spmc_shmem_obj_lookup - Lookup struct spmc_shmem_obj by handle. |
| * @state: Global state. |
| * @handle: Unique handle of object to return. |
| * |
| * Return: struct spmc_shmem_obj_state object with handle matching @handle. |
| * %NULL, if not object in @state->data has a matching handle. |
| */ |
| static struct spmc_shmem_obj * |
| spmc_shmem_obj_lookup(struct spmc_shmem_obj_state *state, uint64_t handle) |
| { |
| uint8_t *curr = state->data; |
| |
| while (curr - state->data < state->allocated) { |
| struct spmc_shmem_obj *obj = (struct spmc_shmem_obj *)curr; |
| |
| if (obj->desc.handle == handle) { |
| return obj; |
| } |
| curr += spmc_shmem_obj_size(obj->desc_size); |
| } |
| return NULL; |
| } |
| |
| /** |
| * spmc_shmem_obj_get_next - Get the next memory object from an offset. |
| * @offset: Offset used to track which objects have previously been |
| * returned. |
| * |
| * Return: the next struct spmc_shmem_obj_state object from the provided |
| * offset. |
| * %NULL, if there are no more objects. |
| */ |
| static struct spmc_shmem_obj * |
| spmc_shmem_obj_get_next(struct spmc_shmem_obj_state *state, size_t *offset) |
| { |
| uint8_t *curr = state->data + *offset; |
| |
| if (curr - state->data < state->allocated) { |
| struct spmc_shmem_obj *obj = (struct spmc_shmem_obj *)curr; |
| |
| *offset += spmc_shmem_obj_size(obj->desc_size); |
| |
| return obj; |
| } |
| return NULL; |
| } |
| |
| /******************************************************************************* |
| * FF-A memory descriptor helper functions. |
| ******************************************************************************/ |
| /** |
| * spmc_shmem_obj_get_emad - Get the emad from a given index depending on the |
| * clients FF-A version. |
| * @desc: The memory transaction descriptor. |
| * @index: The index of the emad element to be accessed. |
| * @ffa_version: FF-A version of the provided structure. |
| * @emad_size: Will be populated with the size of the returned emad |
| * descriptor. |
| * Return: A pointer to the requested emad structure. |
| */ |
| static void * |
| spmc_shmem_obj_get_emad(const struct ffa_mtd *desc, uint32_t index, |
| uint32_t ffa_version, size_t *emad_size) |
| { |
| uint8_t *emad; |
| |
| assert(index < desc->emad_count); |
| |
| /* |
| * If the caller is using FF-A v1.0 interpret the descriptor as a v1.0 |
| * format, otherwise assume it is a v1.1 format. |
| */ |
| if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| emad = (uint8_t *)desc + offsetof(struct ffa_mtd_v1_0, emad); |
| *emad_size = sizeof(struct ffa_emad_v1_0); |
| } else { |
| assert(is_aligned(desc->emad_offset, 16)); |
| emad = ((uint8_t *) desc + desc->emad_offset); |
| *emad_size = desc->emad_size; |
| } |
| |
| assert(((uint64_t)index * (uint64_t)*emad_size) <= UINT32_MAX); |
| return (emad + (*emad_size * index)); |
| } |
| |
| /** |
| * spmc_shmem_obj_get_comp_mrd - Get comp_mrd from a mtd struct based on the |
| * FF-A version of the descriptor. |
| * @obj: Object containing ffa_memory_region_descriptor. |
| * |
| * Return: struct ffa_comp_mrd object corresponding to the composite memory |
| * region descriptor. |
| */ |
| static struct ffa_comp_mrd * |
| spmc_shmem_obj_get_comp_mrd(struct spmc_shmem_obj *obj, uint32_t ffa_version) |
| { |
| size_t emad_size; |
| /* |
| * The comp_mrd_offset field of the emad descriptor remains consistent |
| * between FF-A versions therefore we can use the v1.0 descriptor here |
| * in all cases. |
| */ |
| struct ffa_emad_v1_0 *emad = spmc_shmem_obj_get_emad(&obj->desc, 0, |
| ffa_version, |
| &emad_size); |
| |
| /* Ensure the composite descriptor offset is aligned. */ |
| if (!is_aligned(emad->comp_mrd_offset, 8)) { |
| WARN("Unaligned composite memory region descriptor offset.\n"); |
| return NULL; |
| } |
| |
| return (struct ffa_comp_mrd *) |
| ((uint8_t *)(&obj->desc) + emad->comp_mrd_offset); |
| } |
| |
| /** |
| * spmc_shmem_obj_validate_id - Validate a partition ID is participating in |
| * a given memory transaction. |
| * @sp_id: Partition ID to validate. |
| * @obj: The shared memory object containing the descriptor |
| * of the memory transaction. |
| * Return: true if ID is valid, else false. |
| */ |
| bool spmc_shmem_obj_validate_id(struct spmc_shmem_obj *obj, uint16_t sp_id) |
| { |
| bool found = false; |
| struct ffa_mtd *desc = &obj->desc; |
| size_t desc_size = obj->desc_size; |
| |
| /* Validate the partition is a valid participant. */ |
| for (unsigned int i = 0U; i < desc->emad_count; i++) { |
| size_t emad_size; |
| struct ffa_emad_v1_0 *emad; |
| |
| emad = spmc_shmem_obj_get_emad(desc, i, |
| MAKE_FFA_VERSION(1, 1), |
| &emad_size); |
| /* |
| * Validate the calculated emad address resides within the |
| * descriptor. |
| */ |
| if ((emad == NULL) || (uintptr_t) emad >= |
| (uintptr_t)((uint8_t *) desc + desc_size)) { |
| VERBOSE("Invalid emad.\n"); |
| break; |
| } |
| if (sp_id == emad->mapd.endpoint_id) { |
| found = true; |
| break; |
| } |
| } |
| return found; |
| } |
| |
| /* |
| * Compare two memory regions to determine if any range overlaps with another |
| * ongoing memory transaction. |
| */ |
| static bool |
| overlapping_memory_regions(struct ffa_comp_mrd *region1, |
| struct ffa_comp_mrd *region2) |
| { |
| uint64_t region1_start; |
| uint64_t region1_size; |
| uint64_t region1_end; |
| uint64_t region2_start; |
| uint64_t region2_size; |
| uint64_t region2_end; |
| |
| assert(region1 != NULL); |
| assert(region2 != NULL); |
| |
| if (region1 == region2) { |
| return true; |
| } |
| |
| /* |
| * Check each memory region in the request against existing |
| * transactions. |
| */ |
| for (size_t i = 0; i < region1->address_range_count; i++) { |
| |
| region1_start = region1->address_range_array[i].address; |
| region1_size = |
| region1->address_range_array[i].page_count * |
| PAGE_SIZE_4KB; |
| region1_end = region1_start + region1_size; |
| |
| for (size_t j = 0; j < region2->address_range_count; j++) { |
| |
| region2_start = region2->address_range_array[j].address; |
| region2_size = |
| region2->address_range_array[j].page_count * |
| PAGE_SIZE_4KB; |
| region2_end = region2_start + region2_size; |
| |
| /* Check if regions are not overlapping. */ |
| if (!((region2_end <= region1_start) || |
| (region1_end <= region2_start))) { |
| WARN("Overlapping mem regions 0x%lx-0x%lx & 0x%lx-0x%lx\n", |
| region1_start, region1_end, |
| region2_start, region2_end); |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| /******************************************************************************* |
| * FF-A v1.0 Memory Descriptor Conversion Helpers. |
| ******************************************************************************/ |
| /** |
| * spmc_shm_get_v1_1_descriptor_size - Calculate the required size for a v1.1 |
| * converted descriptor. |
| * @orig: The original v1.0 memory transaction descriptor. |
| * @desc_size: The size of the original v1.0 memory transaction descriptor. |
| * |
| * Return: the size required to store the descriptor store in the v1.1 format. |
| */ |
| static uint64_t |
| spmc_shm_get_v1_1_descriptor_size(struct ffa_mtd_v1_0 *orig, size_t desc_size) |
| { |
| uint64_t size = 0; |
| struct ffa_comp_mrd *mrd; |
| struct ffa_emad_v1_0 *emad_array = orig->emad; |
| |
| /* Get the size of the v1.1 descriptor. */ |
| size += sizeof(struct ffa_mtd); |
| |
| /* Add the size of the emad descriptors. */ |
| size += orig->emad_count * sizeof(struct ffa_emad_v1_0); |
| |
| /* Add the size of the composite mrds. */ |
| size += sizeof(struct ffa_comp_mrd); |
| |
| /* Add the size of the constituent mrds. */ |
| mrd = (struct ffa_comp_mrd *) ((uint8_t *) orig + |
| emad_array[0].comp_mrd_offset); |
| |
| /* Add the size of the memory region descriptors. */ |
| size += mrd->address_range_count * sizeof(struct ffa_cons_mrd); |
| |
| return size; |
| } |
| |
| /** |
| * spmc_shm_get_v1_0_descriptor_size - Calculate the required size for a v1.0 |
| * converted descriptor. |
| * @orig: The original v1.1 memory transaction descriptor. |
| * @desc_size: The size of the original v1.1 memory transaction descriptor. |
| * |
| * Return: the size required to store the descriptor store in the v1.0 format. |
| */ |
| static size_t |
| spmc_shm_get_v1_0_descriptor_size(struct ffa_mtd *orig, size_t desc_size) |
| { |
| size_t size = 0; |
| struct ffa_comp_mrd *mrd; |
| struct ffa_emad_v1_0 *emad_array = (struct ffa_emad_v1_0 *) |
| ((uint8_t *) orig + |
| orig->emad_offset); |
| |
| /* Get the size of the v1.0 descriptor. */ |
| size += sizeof(struct ffa_mtd_v1_0); |
| |
| /* Add the size of the v1.0 emad descriptors. */ |
| size += orig->emad_count * sizeof(struct ffa_emad_v1_0); |
| |
| /* Add the size of the composite mrds. */ |
| size += sizeof(struct ffa_comp_mrd); |
| |
| /* Add the size of the constituent mrds. */ |
| mrd = (struct ffa_comp_mrd *) ((uint8_t *) orig + |
| emad_array[0].comp_mrd_offset); |
| |
| /* Check the calculated address is within the memory descriptor. */ |
| if (((uintptr_t) mrd + sizeof(struct ffa_comp_mrd)) > |
| (uintptr_t)((uint8_t *) orig + desc_size)) { |
| return 0; |
| } |
| size += mrd->address_range_count * sizeof(struct ffa_cons_mrd); |
| |
| return size; |
| } |
| |
| /** |
| * spmc_shm_convert_shmem_obj_from_v1_0 - Converts a given v1.0 memory object. |
| * @out_obj: The shared memory object to populate the converted descriptor. |
| * @orig: The shared memory object containing the v1.0 descriptor. |
| * |
| * Return: true if the conversion is successful else false. |
| */ |
| static bool |
| spmc_shm_convert_shmem_obj_from_v1_0(struct spmc_shmem_obj *out_obj, |
| struct spmc_shmem_obj *orig) |
| { |
| struct ffa_mtd_v1_0 *mtd_orig = (struct ffa_mtd_v1_0 *) &orig->desc; |
| struct ffa_mtd *out = &out_obj->desc; |
| struct ffa_emad_v1_0 *emad_array_in; |
| struct ffa_emad_v1_0 *emad_array_out; |
| struct ffa_comp_mrd *mrd_in; |
| struct ffa_comp_mrd *mrd_out; |
| |
| size_t mrd_in_offset; |
| size_t mrd_out_offset; |
| size_t mrd_size = 0; |
| |
| /* Populate the new descriptor format from the v1.0 struct. */ |
| out->sender_id = mtd_orig->sender_id; |
| out->memory_region_attributes = mtd_orig->memory_region_attributes; |
| out->flags = mtd_orig->flags; |
| out->handle = mtd_orig->handle; |
| out->tag = mtd_orig->tag; |
| out->emad_count = mtd_orig->emad_count; |
| out->emad_size = sizeof(struct ffa_emad_v1_0); |
| |
| /* |
| * We will locate the emad descriptors directly after the ffa_mtd |
| * struct. This will be 8-byte aligned. |
| */ |
| out->emad_offset = sizeof(struct ffa_mtd); |
| |
| emad_array_in = mtd_orig->emad; |
| emad_array_out = (struct ffa_emad_v1_0 *) |
| ((uint8_t *) out + out->emad_offset); |
| |
| /* Copy across the emad structs. */ |
| for (unsigned int i = 0U; i < out->emad_count; i++) { |
| /* Bound check for emad array. */ |
| if (((uint8_t *)emad_array_in + sizeof(struct ffa_emad_v1_0)) > |
| ((uint8_t *) mtd_orig + orig->desc_size)) { |
| VERBOSE("%s: Invalid mtd structure.\n", __func__); |
| return false; |
| } |
| memcpy(&emad_array_out[i], &emad_array_in[i], |
| sizeof(struct ffa_emad_v1_0)); |
| } |
| |
| /* Place the mrd descriptors after the end of the emad descriptors.*/ |
| mrd_in_offset = emad_array_in->comp_mrd_offset; |
| mrd_out_offset = out->emad_offset + (out->emad_size * out->emad_count); |
| mrd_out = (struct ffa_comp_mrd *) ((uint8_t *) out + mrd_out_offset); |
| |
| /* Add the size of the composite memory region descriptor. */ |
| mrd_size += sizeof(struct ffa_comp_mrd); |
| |
| /* Find the mrd descriptor. */ |
| mrd_in = (struct ffa_comp_mrd *) ((uint8_t *) mtd_orig + mrd_in_offset); |
| |
| /* Add the size of the constituent memory region descriptors. */ |
| mrd_size += mrd_in->address_range_count * sizeof(struct ffa_cons_mrd); |
| |
| /* |
| * Update the offset in the emads by the delta between the input and |
| * output addresses. |
| */ |
| for (unsigned int i = 0U; i < out->emad_count; i++) { |
| emad_array_out[i].comp_mrd_offset = |
| emad_array_in[i].comp_mrd_offset + |
| (mrd_out_offset - mrd_in_offset); |
| } |
| |
| /* Verify that we stay within bound of the memory descriptors. */ |
| if ((uintptr_t)((uint8_t *) mrd_in + mrd_size) > |
| (uintptr_t)((uint8_t *) mtd_orig + orig->desc_size) || |
| ((uintptr_t)((uint8_t *) mrd_out + mrd_size) > |
| (uintptr_t)((uint8_t *) out + out_obj->desc_size))) { |
| ERROR("%s: Invalid mrd structure.\n", __func__); |
| return false; |
| } |
| |
| /* Copy the mrd descriptors directly. */ |
| memcpy(mrd_out, mrd_in, mrd_size); |
| |
| return true; |
| } |
| |
| /** |
| * spmc_shm_convert_mtd_to_v1_0 - Converts a given v1.1 memory object to |
| * v1.0 memory object. |
| * @out_obj: The shared memory object to populate the v1.0 descriptor. |
| * @orig: The shared memory object containing the v1.1 descriptor. |
| * |
| * Return: true if the conversion is successful else false. |
| */ |
| static bool |
| spmc_shm_convert_mtd_to_v1_0(struct spmc_shmem_obj *out_obj, |
| struct spmc_shmem_obj *orig) |
| { |
| struct ffa_mtd *mtd_orig = &orig->desc; |
| struct ffa_mtd_v1_0 *out = (struct ffa_mtd_v1_0 *) &out_obj->desc; |
| struct ffa_emad_v1_0 *emad_in; |
| struct ffa_emad_v1_0 *emad_array_in; |
| struct ffa_emad_v1_0 *emad_array_out; |
| struct ffa_comp_mrd *mrd_in; |
| struct ffa_comp_mrd *mrd_out; |
| |
| size_t mrd_in_offset; |
| size_t mrd_out_offset; |
| size_t emad_out_array_size; |
| size_t mrd_size = 0; |
| size_t orig_desc_size = orig->desc_size; |
| |
| /* Populate the v1.0 descriptor format from the v1.1 struct. */ |
| out->sender_id = mtd_orig->sender_id; |
| out->memory_region_attributes = mtd_orig->memory_region_attributes; |
| out->flags = mtd_orig->flags; |
| out->handle = mtd_orig->handle; |
| out->tag = mtd_orig->tag; |
| out->emad_count = mtd_orig->emad_count; |
| |
| /* Determine the location of the emad array in both descriptors. */ |
| emad_array_in = (struct ffa_emad_v1_0 *) |
| ((uint8_t *) mtd_orig + mtd_orig->emad_offset); |
| emad_array_out = out->emad; |
| |
| /* Copy across the emad structs. */ |
| emad_in = emad_array_in; |
| for (unsigned int i = 0U; i < out->emad_count; i++) { |
| /* Bound check for emad array. */ |
| if (((uint8_t *)emad_in + sizeof(struct ffa_emad_v1_0)) > |
| ((uint8_t *) mtd_orig + orig_desc_size)) { |
| VERBOSE("%s: Invalid mtd structure.\n", __func__); |
| return false; |
| } |
| memcpy(&emad_array_out[i], emad_in, |
| sizeof(struct ffa_emad_v1_0)); |
| |
| emad_in += mtd_orig->emad_size; |
| } |
| |
| /* Place the mrd descriptors after the end of the emad descriptors. */ |
| emad_out_array_size = sizeof(struct ffa_emad_v1_0) * out->emad_count; |
| |
| mrd_out_offset = (uint8_t *) out->emad - (uint8_t *) out + |
| emad_out_array_size; |
| |
| mrd_out = (struct ffa_comp_mrd *) ((uint8_t *) out + mrd_out_offset); |
| |
| mrd_in_offset = mtd_orig->emad_offset + |
| (mtd_orig->emad_size * mtd_orig->emad_count); |
| |
| /* Add the size of the composite memory region descriptor. */ |
| mrd_size += sizeof(struct ffa_comp_mrd); |
| |
| /* Find the mrd descriptor. */ |
| mrd_in = (struct ffa_comp_mrd *) ((uint8_t *) mtd_orig + mrd_in_offset); |
| |
| /* Add the size of the constituent memory region descriptors. */ |
| mrd_size += mrd_in->address_range_count * sizeof(struct ffa_cons_mrd); |
| |
| /* |
| * Update the offset in the emads by the delta between the input and |
| * output addresses. |
| */ |
| emad_in = emad_array_in; |
| |
| for (unsigned int i = 0U; i < out->emad_count; i++) { |
| emad_array_out[i].comp_mrd_offset = emad_in->comp_mrd_offset + |
| (mrd_out_offset - |
| mrd_in_offset); |
| emad_in += mtd_orig->emad_size; |
| } |
| |
| /* Verify that we stay within bound of the memory descriptors. */ |
| if ((uintptr_t)((uint8_t *) mrd_in + mrd_size) > |
| (uintptr_t)((uint8_t *) mtd_orig + orig->desc_size) || |
| ((uintptr_t)((uint8_t *) mrd_out + mrd_size) > |
| (uintptr_t)((uint8_t *) out + out_obj->desc_size))) { |
| ERROR("%s: Invalid mrd structure.\n", __func__); |
| return false; |
| } |
| |
| /* Copy the mrd descriptors directly. */ |
| memcpy(mrd_out, mrd_in, mrd_size); |
| |
| return true; |
| } |
| |
| /** |
| * spmc_populate_ffa_v1_0_descriptor - Converts a given v1.1 memory object to |
| * the v1.0 format and populates the |
| * provided buffer. |
| * @dst: Buffer to populate v1.0 ffa_memory_region_descriptor. |
| * @orig_obj: Object containing v1.1 ffa_memory_region_descriptor. |
| * @buf_size: Size of the buffer to populate. |
| * @offset: The offset of the converted descriptor to copy. |
| * @copy_size: Will be populated with the number of bytes copied. |
| * @out_desc_size: Will be populated with the total size of the v1.0 |
| * descriptor. |
| * |
| * Return: 0 if conversion and population succeeded. |
| * Note: This function invalidates the reference to @orig therefore |
| * `spmc_shmem_obj_lookup` must be called if further usage is required. |
| */ |
| static uint32_t |
| spmc_populate_ffa_v1_0_descriptor(void *dst, struct spmc_shmem_obj *orig_obj, |
| size_t buf_size, size_t offset, |
| size_t *copy_size, size_t *v1_0_desc_size) |
| { |
| struct spmc_shmem_obj *v1_0_obj; |
| |
| /* Calculate the size that the v1.0 descriptor will require. */ |
| *v1_0_desc_size = spmc_shm_get_v1_0_descriptor_size( |
| &orig_obj->desc, orig_obj->desc_size); |
| |
| if (*v1_0_desc_size == 0) { |
| ERROR("%s: cannot determine size of descriptor.\n", |
| __func__); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| |
| /* Get a new obj to store the v1.0 descriptor. */ |
| v1_0_obj = spmc_shmem_obj_alloc(&spmc_shmem_obj_state, |
| *v1_0_desc_size); |
| |
| if (!v1_0_obj) { |
| return FFA_ERROR_NO_MEMORY; |
| } |
| |
| /* Perform the conversion from v1.1 to v1.0. */ |
| if (!spmc_shm_convert_mtd_to_v1_0(v1_0_obj, orig_obj)) { |
| spmc_shmem_obj_free(&spmc_shmem_obj_state, v1_0_obj); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| |
| *copy_size = MIN(v1_0_obj->desc_size - offset, buf_size); |
| memcpy(dst, (uint8_t *) &v1_0_obj->desc + offset, *copy_size); |
| |
| /* |
| * We're finished with the v1.0 descriptor for now so free it. |
| * Note that this will invalidate any references to the v1.1 |
| * descriptor. |
| */ |
| spmc_shmem_obj_free(&spmc_shmem_obj_state, v1_0_obj); |
| |
| return 0; |
| } |
| |
| static int |
| spmc_validate_mtd_start(struct ffa_mtd *desc, uint32_t ffa_version, |
| size_t fragment_length, size_t total_length) |
| { |
| unsigned long long emad_end; |
| unsigned long long emad_size; |
| unsigned long long emad_offset; |
| unsigned int min_desc_size; |
| |
| /* Determine the appropriate minimum descriptor size. */ |
| if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| min_desc_size = sizeof(struct ffa_mtd_v1_0); |
| } else if (ffa_version == MAKE_FFA_VERSION(1, 1)) { |
| min_desc_size = sizeof(struct ffa_mtd); |
| } else { |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| if (fragment_length < min_desc_size) { |
| WARN("%s: invalid length %zu < %u\n", __func__, fragment_length, |
| min_desc_size); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| |
| if (desc->emad_count == 0U) { |
| WARN("%s: unsupported attribute desc count %u.\n", |
| __func__, desc->emad_count); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| |
| /* |
| * If the caller is using FF-A v1.0 interpret the descriptor as a v1.0 |
| * format, otherwise assume it is a v1.1 format. |
| */ |
| if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| emad_offset = emad_size = sizeof(struct ffa_emad_v1_0); |
| } else { |
| if (!is_aligned(desc->emad_offset, 16)) { |
| WARN("%s: Emad offset %" PRIx32 " is not 16-byte aligned.\n", |
| __func__, desc->emad_offset); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| if (desc->emad_offset < sizeof(struct ffa_mtd)) { |
| WARN("%s: Emad offset too small: 0x%" PRIx32 " < 0x%zx.\n", |
| __func__, desc->emad_offset, |
| sizeof(struct ffa_mtd)); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| emad_offset = desc->emad_offset; |
| if (desc->emad_size < sizeof(struct ffa_emad_v1_0)) { |
| WARN("%s: Bad emad size (%" PRIu32 " < %zu).\n", __func__, |
| desc->emad_size, sizeof(struct ffa_emad_v1_0)); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| if (!is_aligned(desc->emad_size, 16)) { |
| WARN("%s: Emad size 0x%" PRIx32 " is not 16-byte aligned.\n", |
| __func__, desc->emad_size); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| emad_size = desc->emad_size; |
| } |
| |
| /* |
| * Overflow is impossible: the arithmetic happens in at least 64-bit |
| * precision, but all of the operands are bounded by UINT32_MAX, and |
| * ((2^32 - 1) * (2^32 - 1) + (2^32 - 1) + (2^32 - 1)) |
| * = ((2^32 - 1) * ((2^32 - 1) + 1 + 1)) |
| * = ((2^32 - 1) * (2^32 + 1)) |
| * = (2^64 - 1). |
| */ |
| CASSERT(sizeof(desc->emad_count) == 4, assert_emad_count_max_too_large); |
| emad_end = (desc->emad_count * (unsigned long long)emad_size) + |
| (unsigned long long)sizeof(struct ffa_comp_mrd) + |
| (unsigned long long)emad_offset; |
| |
| if (emad_end > total_length) { |
| WARN("%s: Composite memory region extends beyond descriptor: 0x%llx > 0x%zx\n", |
| __func__, emad_end, total_length); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| |
| return 0; |
| } |
| |
| static inline const struct ffa_emad_v1_0 * |
| emad_advance(const struct ffa_emad_v1_0 *emad, size_t offset) |
| { |
| return (const struct ffa_emad_v1_0 *)((const uint8_t *)emad + offset); |
| } |
| |
| /** |
| * spmc_shmem_check_obj - Check that counts in descriptor match overall size. |
| * @obj: Object containing ffa_memory_region_descriptor. |
| * @ffa_version: FF-A version of the provided descriptor. |
| * |
| * Return: 0 if object is valid, FFA_ERROR_INVALID_PARAMETER if |
| * constituent_memory_region_descriptor offset or count is invalid. |
| */ |
| static int spmc_shmem_check_obj(struct spmc_shmem_obj *obj, |
| uint32_t ffa_version) |
| { |
| unsigned long long total_page_count; |
| const struct ffa_emad_v1_0 *first_emad; |
| const struct ffa_emad_v1_0 *end_emad; |
| size_t emad_size; |
| uint32_t comp_mrd_offset; |
| size_t header_emad_size; |
| size_t size; |
| size_t count; |
| size_t expected_size; |
| const struct ffa_comp_mrd *comp; |
| |
| if (obj->desc_filled != obj->desc_size) { |
| ERROR("BUG: %s called on incomplete object (%zu != %zu)\n", |
| __func__, obj->desc_filled, obj->desc_size); |
| panic(); |
| } |
| |
| if (spmc_validate_mtd_start(&obj->desc, ffa_version, |
| obj->desc_filled, obj->desc_size)) { |
| ERROR("BUG: %s called on object with corrupt memory region descriptor\n", |
| __func__); |
| panic(); |
| } |
| |
| first_emad = spmc_shmem_obj_get_emad(&obj->desc, 0, |
| ffa_version, &emad_size); |
| end_emad = emad_advance(first_emad, obj->desc.emad_count * emad_size); |
| comp_mrd_offset = first_emad->comp_mrd_offset; |
| |
| /* Loop through the endpoint descriptors, validating each of them. */ |
| for (const struct ffa_emad_v1_0 *emad = first_emad; emad < end_emad;) { |
| ffa_endpoint_id16_t ep_id; |
| |
| /* |
| * If a partition ID resides in the secure world validate that |
| * the partition ID is for a known partition. Ignore any |
| * partition ID belonging to the normal world as it is assumed |
| * the Hypervisor will have validated these. |
| */ |
| ep_id = emad->mapd.endpoint_id; |
| if (ffa_is_secure_world_id(ep_id)) { |
| if (spmc_get_sp_ctx(ep_id) == NULL) { |
| WARN("%s: Invalid receiver id 0x%x\n", |
| __func__, ep_id); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| } |
| |
| /* |
| * The offset provided to the composite memory region descriptor |
| * should be consistent across endpoint descriptors. |
| */ |
| if (comp_mrd_offset != emad->comp_mrd_offset) { |
| ERROR("%s: mismatching offsets provided, %u != %u\n", |
| __func__, emad->comp_mrd_offset, comp_mrd_offset); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| |
| /* Advance to the next endpoint descriptor */ |
| emad = emad_advance(emad, emad_size); |
| |
| /* |
| * Ensure neither this emad nor any subsequent emads have |
| * the same partition ID as the previous emad. |
| */ |
| for (const struct ffa_emad_v1_0 *other_emad = emad; |
| other_emad < end_emad; |
| other_emad = emad_advance(other_emad, emad_size)) { |
| if (ep_id == other_emad->mapd.endpoint_id) { |
| WARN("%s: Duplicated endpoint id 0x%x\n", |
| __func__, emad->mapd.endpoint_id); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| } |
| } |
| |
| header_emad_size = (size_t)((const uint8_t *)end_emad - |
| (const uint8_t *)&obj->desc); |
| |
| /* |
| * Check that the composite descriptor |
| * is after the endpoint descriptors. |
| */ |
| if (comp_mrd_offset < header_emad_size) { |
| WARN("%s: invalid object, offset %u < header + emad %zu\n", |
| __func__, comp_mrd_offset, header_emad_size); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| |
| /* Ensure the composite descriptor offset is aligned. */ |
| if (!is_aligned(comp_mrd_offset, 16)) { |
| WARN("%s: invalid object, unaligned composite memory " |
| "region descriptor offset %u.\n", |
| __func__, comp_mrd_offset); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| |
| size = obj->desc_size; |
| |
| /* Check that the composite descriptor is in bounds. */ |
| if (comp_mrd_offset > size) { |
| WARN("%s: invalid object, offset %u > total size %zu\n", |
| __func__, comp_mrd_offset, obj->desc_size); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| size -= comp_mrd_offset; |
| |
| /* Check that there is enough space for the composite descriptor. */ |
| if (size < sizeof(struct ffa_comp_mrd)) { |
| WARN("%s: invalid object, offset %u, total size %zu, no header space.\n", |
| __func__, comp_mrd_offset, obj->desc_size); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| size -= sizeof(*comp); |
| |
| count = size / sizeof(struct ffa_cons_mrd); |
| |
| comp = (const struct ffa_comp_mrd *) |
| ((const uint8_t *)(&obj->desc) + comp_mrd_offset); |
| |
| if (comp->address_range_count != count) { |
| WARN("%s: invalid object, desc count %u != %zu\n", |
| __func__, comp->address_range_count, count); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| |
| /* Ensure that the expected and actual sizes are equal. */ |
| expected_size = comp_mrd_offset + sizeof(*comp) + |
| count * sizeof(struct ffa_cons_mrd); |
| |
| if (expected_size != obj->desc_size) { |
| WARN("%s: invalid object, computed size %zu != size %zu\n", |
| __func__, expected_size, obj->desc_size); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| |
| total_page_count = 0; |
| |
| /* |
| * comp->address_range_count is 32-bit, so 'count' must fit in a |
| * uint32_t at this point. |
| */ |
| for (size_t i = 0; i < count; i++) { |
| const struct ffa_cons_mrd *mrd = comp->address_range_array + i; |
| |
| if (!is_aligned(mrd->address, PAGE_SIZE)) { |
| WARN("%s: invalid object, address in region descriptor " |
| "%zu not 4K aligned (got 0x%016llx)", |
| __func__, i, (unsigned long long)mrd->address); |
| } |
| |
| /* |
| * No overflow possible: total_page_count can hold at |
| * least 2^64 - 1, but will be have at most 2^32 - 1. |
| * values added to it, each of which cannot exceed 2^32 - 1. |
| */ |
| total_page_count += mrd->page_count; |
| } |
| |
| if (comp->total_page_count != total_page_count) { |
| WARN("%s: invalid object, desc total_page_count %u != %llu\n", |
| __func__, comp->total_page_count, total_page_count); |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * spmc_shmem_check_state_obj - Check if the descriptor describes memory |
| * regions that are currently involved with an |
| * existing memory transactions. This implies that |
| * the memory is not in a valid state for lending. |
| * @obj: Object containing ffa_memory_region_descriptor. |
| * |
| * Return: 0 if object is valid, FFA_ERROR_INVALID_PARAMETER if invalid memory |
| * state. |
| */ |
| static int spmc_shmem_check_state_obj(struct spmc_shmem_obj *obj, |
| uint32_t ffa_version) |
| { |
| size_t obj_offset = 0; |
| struct spmc_shmem_obj *inflight_obj; |
| |
| struct ffa_comp_mrd *other_mrd; |
| struct ffa_comp_mrd *requested_mrd = spmc_shmem_obj_get_comp_mrd(obj, |
| ffa_version); |
| |
| if (requested_mrd == NULL) { |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| |
| inflight_obj = spmc_shmem_obj_get_next(&spmc_shmem_obj_state, |
| &obj_offset); |
| |
| while (inflight_obj != NULL) { |
| /* |
| * Don't compare the transaction to itself or to partially |
| * transmitted descriptors. |
| */ |
| if ((obj->desc.handle != inflight_obj->desc.handle) && |
| (obj->desc_size == obj->desc_filled)) { |
| other_mrd = spmc_shmem_obj_get_comp_mrd(inflight_obj, |
| FFA_VERSION_COMPILED); |
| if (other_mrd == NULL) { |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| if (overlapping_memory_regions(requested_mrd, |
| other_mrd)) { |
| return FFA_ERROR_INVALID_PARAMETER; |
| } |
| } |
| |
| inflight_obj = spmc_shmem_obj_get_next(&spmc_shmem_obj_state, |
| &obj_offset); |
| } |
| return 0; |
| } |
| |
| static long spmc_ffa_fill_desc(struct mailbox *mbox, |
| struct spmc_shmem_obj *obj, |
| uint32_t fragment_length, |
| ffa_mtd_flag32_t mtd_flag, |
| uint32_t ffa_version, |
| void *smc_handle) |
| { |
| int ret; |
| uint32_t handle_low; |
| uint32_t handle_high; |
| |
| if (mbox->rxtx_page_count == 0U) { |
| WARN("%s: buffer pair not registered.\n", __func__); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_arg; |
| } |
| |
| CASSERT(sizeof(mbox->rxtx_page_count) == 4, assert_bogus_page_count); |
| if (fragment_length > (uint64_t)mbox->rxtx_page_count * PAGE_SIZE_4KB) { |
| WARN("%s: bad fragment size %u > %" PRIu64 " buffer size\n", __func__, |
| fragment_length, (uint64_t)mbox->rxtx_page_count * PAGE_SIZE_4KB); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_arg; |
| } |
| |
| if (fragment_length > obj->desc_size - obj->desc_filled) { |
| WARN("%s: bad fragment size %u > %zu remaining\n", __func__, |
| fragment_length, obj->desc_size - obj->desc_filled); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_arg; |
| } |
| |
| memcpy((uint8_t *)&obj->desc + obj->desc_filled, |
| (uint8_t *) mbox->tx_buffer, fragment_length); |
| |
| /* Ensure that the sender ID resides in the normal world. */ |
| if (ffa_is_secure_world_id(obj->desc.sender_id)) { |
| WARN("%s: Invalid sender ID 0x%x.\n", |
| __func__, obj->desc.sender_id); |
| ret = FFA_ERROR_DENIED; |
| goto err_arg; |
| } |
| |
| /* Ensure the NS bit is set to 0. */ |
| if ((obj->desc.memory_region_attributes & FFA_MEM_ATTR_NS_BIT) != 0U) { |
| WARN("%s: NS mem attributes flags MBZ.\n", __func__); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_arg; |
| } |
| |
| /* |
| * We don't currently support any optional flags so ensure none are |
| * requested. |
| */ |
| if (obj->desc.flags != 0U && mtd_flag != 0U && |
| (obj->desc.flags != mtd_flag)) { |
| WARN("%s: invalid memory transaction flags %u != %u\n", |
| __func__, obj->desc.flags, mtd_flag); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_arg; |
| } |
| |
| if (obj->desc_filled == 0U) { |
| /* First fragment, descriptor header has been copied */ |
| ret = spmc_validate_mtd_start(&obj->desc, ffa_version, |
| fragment_length, obj->desc_size); |
| if (ret != 0) { |
| goto err_bad_desc; |
| } |
| |
| obj->desc.handle = spmc_shmem_obj_state.next_handle++; |
| obj->desc.flags |= mtd_flag; |
| } |
| |
| obj->desc_filled += fragment_length; |
| |
| handle_low = (uint32_t)obj->desc.handle; |
| handle_high = obj->desc.handle >> 32; |
| |
| if (obj->desc_filled != obj->desc_size) { |
| SMC_RET8(smc_handle, FFA_MEM_FRAG_RX, handle_low, |
| handle_high, obj->desc_filled, |
| (uint32_t)obj->desc.sender_id << 16, 0, 0, 0); |
| } |
| |
| /* The full descriptor has been received, perform any final checks. */ |
| |
| ret = spmc_shmem_check_obj(obj, ffa_version); |
| if (ret != 0) { |
| goto err_bad_desc; |
| } |
| |
| ret = spmc_shmem_check_state_obj(obj, ffa_version); |
| if (ret) { |
| ERROR("%s: invalid memory region descriptor.\n", __func__); |
| goto err_bad_desc; |
| } |
| |
| /* |
| * Everything checks out, if the sender was using FF-A v1.0, convert |
| * the descriptor format to use the v1.1 structures. |
| */ |
| if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| struct spmc_shmem_obj *v1_1_obj; |
| uint64_t mem_handle; |
| |
| /* Calculate the size that the v1.1 descriptor will required. */ |
| uint64_t v1_1_desc_size = |
| spmc_shm_get_v1_1_descriptor_size((void *) &obj->desc, |
| obj->desc_size); |
| |
| if (v1_1_desc_size > UINT32_MAX) { |
| ret = FFA_ERROR_NO_MEMORY; |
| goto err_arg; |
| } |
| |
| /* Get a new obj to store the v1.1 descriptor. */ |
| v1_1_obj = |
| spmc_shmem_obj_alloc(&spmc_shmem_obj_state, (size_t)v1_1_desc_size); |
| |
| if (!v1_1_obj) { |
| ret = FFA_ERROR_NO_MEMORY; |
| goto err_arg; |
| } |
| |
| /* Perform the conversion from v1.0 to v1.1. */ |
| v1_1_obj->desc_size = (uint32_t)v1_1_desc_size; |
| v1_1_obj->desc_filled = (uint32_t)v1_1_desc_size; |
| if (!spmc_shm_convert_shmem_obj_from_v1_0(v1_1_obj, obj)) { |
| ERROR("%s: Could not convert mtd!\n", __func__); |
| spmc_shmem_obj_free(&spmc_shmem_obj_state, v1_1_obj); |
| goto err_arg; |
| } |
| |
| /* |
| * We're finished with the v1.0 descriptor so free it |
| * and continue our checks with the new v1.1 descriptor. |
| */ |
| mem_handle = obj->desc.handle; |
| spmc_shmem_obj_free(&spmc_shmem_obj_state, obj); |
| obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| if (obj == NULL) { |
| ERROR("%s: Failed to find converted descriptor.\n", |
| __func__); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| return spmc_ffa_error_return(smc_handle, ret); |
| } |
| } |
| |
| /* Allow for platform specific operations to be performed. */ |
| ret = plat_spmc_shmem_begin(&obj->desc); |
| if (ret != 0) { |
| goto err_arg; |
| } |
| |
| SMC_RET8(smc_handle, FFA_SUCCESS_SMC32, 0, handle_low, handle_high, 0, |
| 0, 0, 0); |
| |
| err_bad_desc: |
| err_arg: |
| spmc_shmem_obj_free(&spmc_shmem_obj_state, obj); |
| return spmc_ffa_error_return(smc_handle, ret); |
| } |
| |
| /** |
| * spmc_ffa_mem_send - FFA_MEM_SHARE/LEND implementation. |
| * @client: Client state. |
| * @total_length: Total length of shared memory descriptor. |
| * @fragment_length: Length of fragment of shared memory descriptor passed in |
| * this call. |
| * @address: Not supported, must be 0. |
| * @page_count: Not supported, must be 0. |
| * @smc_handle: Handle passed to smc call. Used to return |
| * FFA_MEM_FRAG_RX or SMC_FC_FFA_SUCCESS. |
| * |
| * Implements a subset of the FF-A FFA_MEM_SHARE and FFA_MEM_LEND calls needed |
| * to share or lend memory from non-secure os to secure os (with no stream |
| * endpoints). |
| * |
| * Return: 0 on success, error code on failure. |
| */ |
| long spmc_ffa_mem_send(uint32_t smc_fid, |
| bool secure_origin, |
| uint64_t total_length, |
| uint32_t fragment_length, |
| uint64_t address, |
| uint32_t page_count, |
| void *cookie, |
| void *handle, |
| uint64_t flags) |
| |
| { |
| long ret; |
| struct spmc_shmem_obj *obj; |
| struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| ffa_mtd_flag32_t mtd_flag; |
| uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
| size_t min_desc_size; |
| |
| if (address != 0U || page_count != 0U) { |
| WARN("%s: custom memory region for message not supported.\n", |
| __func__); |
| return spmc_ffa_error_return(handle, |
| FFA_ERROR_INVALID_PARAMETER); |
| } |
| |
| if (secure_origin) { |
| WARN("%s: unsupported share direction.\n", __func__); |
| return spmc_ffa_error_return(handle, |
| FFA_ERROR_INVALID_PARAMETER); |
| } |
| |
| if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| min_desc_size = sizeof(struct ffa_mtd_v1_0); |
| } else if (ffa_version == MAKE_FFA_VERSION(1, 1)) { |
| min_desc_size = sizeof(struct ffa_mtd); |
| } else { |
| WARN("%s: bad FF-A version.\n", __func__); |
| return spmc_ffa_error_return(handle, |
| FFA_ERROR_INVALID_PARAMETER); |
| } |
| |
| /* Check if the descriptor is too small for the FF-A version. */ |
| if (fragment_length < min_desc_size) { |
| WARN("%s: bad first fragment size %u < %zu\n", |
| __func__, fragment_length, sizeof(struct ffa_mtd_v1_0)); |
| return spmc_ffa_error_return(handle, |
| FFA_ERROR_INVALID_PARAMETER); |
| } |
| |
| if ((smc_fid & FUNCID_NUM_MASK) == FFA_FNUM_MEM_SHARE) { |
| mtd_flag = FFA_MTD_FLAG_TYPE_SHARE_MEMORY; |
| } else if ((smc_fid & FUNCID_NUM_MASK) == FFA_FNUM_MEM_LEND) { |
| mtd_flag = FFA_MTD_FLAG_TYPE_LEND_MEMORY; |
| } else { |
| WARN("%s: invalid memory management operation.\n", __func__); |
| return spmc_ffa_error_return(handle, |
| FFA_ERROR_INVALID_PARAMETER); |
| } |
| |
| spin_lock(&spmc_shmem_obj_state.lock); |
| obj = spmc_shmem_obj_alloc(&spmc_shmem_obj_state, total_length); |
| if (obj == NULL) { |
| ret = FFA_ERROR_NO_MEMORY; |
| goto err_unlock; |
| } |
| |
| spin_lock(&mbox->lock); |
| ret = spmc_ffa_fill_desc(mbox, obj, fragment_length, mtd_flag, |
| ffa_version, handle); |
| spin_unlock(&mbox->lock); |
| |
| spin_unlock(&spmc_shmem_obj_state.lock); |
| return ret; |
| |
| err_unlock: |
| spin_unlock(&spmc_shmem_obj_state.lock); |
| return spmc_ffa_error_return(handle, ret); |
| } |
| |
| /** |
| * spmc_ffa_mem_frag_tx - FFA_MEM_FRAG_TX implementation. |
| * @client: Client state. |
| * @handle_low: Handle_low value returned from FFA_MEM_FRAG_RX. |
| * @handle_high: Handle_high value returned from FFA_MEM_FRAG_RX. |
| * @fragment_length: Length of fragments transmitted. |
| * @sender_id: Vmid of sender in bits [31:16] |
| * @smc_handle: Handle passed to smc call. Used to return |
| * FFA_MEM_FRAG_RX or SMC_FC_FFA_SUCCESS. |
| * |
| * Return: @smc_handle on success, error code on failure. |
| */ |
| long spmc_ffa_mem_frag_tx(uint32_t smc_fid, |
| bool secure_origin, |
| uint64_t handle_low, |
| uint64_t handle_high, |
| uint32_t fragment_length, |
| uint32_t sender_id, |
| void *cookie, |
| void *handle, |
| uint64_t flags) |
| { |
| long ret; |
| uint32_t desc_sender_id; |
| uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
| struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| |
| struct spmc_shmem_obj *obj; |
| uint64_t mem_handle = handle_low | (((uint64_t)handle_high) << 32); |
| |
| spin_lock(&spmc_shmem_obj_state.lock); |
| |
| obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| if (obj == NULL) { |
| WARN("%s: invalid handle, 0x%lx, not a valid handle.\n", |
| __func__, mem_handle); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock; |
| } |
| |
| desc_sender_id = (uint32_t)obj->desc.sender_id << 16; |
| if (sender_id != desc_sender_id) { |
| WARN("%s: invalid sender_id 0x%x != 0x%x\n", __func__, |
| sender_id, desc_sender_id); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock; |
| } |
| |
| if (obj->desc_filled == obj->desc_size) { |
| WARN("%s: object desc already filled, %zu\n", __func__, |
| obj->desc_filled); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock; |
| } |
| |
| spin_lock(&mbox->lock); |
| ret = spmc_ffa_fill_desc(mbox, obj, fragment_length, 0, ffa_version, |
| handle); |
| spin_unlock(&mbox->lock); |
| |
| spin_unlock(&spmc_shmem_obj_state.lock); |
| return ret; |
| |
| err_unlock: |
| spin_unlock(&spmc_shmem_obj_state.lock); |
| return spmc_ffa_error_return(handle, ret); |
| } |
| |
| /** |
| * spmc_ffa_mem_retrieve_set_ns_bit - Set the NS bit in the response descriptor |
| * if the caller implements a version greater |
| * than FF-A 1.0 or if they have requested |
| * the functionality. |
| * TODO: We are assuming that the caller is |
| * an SP. To support retrieval from the |
| * normal world this function will need to be |
| * expanded accordingly. |
| * @resp: Descriptor populated in callers RX buffer. |
| * @sp_ctx: Context of the calling SP. |
| */ |
| void spmc_ffa_mem_retrieve_set_ns_bit(struct ffa_mtd *resp, |
| struct secure_partition_desc *sp_ctx) |
| { |
| if (sp_ctx->ffa_version > MAKE_FFA_VERSION(1, 0) || |
| sp_ctx->ns_bit_requested) { |
| /* |
| * Currently memory senders must reside in the normal |
| * world, and we do not have the functionlaity to change |
| * the state of memory dynamically. Therefore we can always set |
| * the NS bit to 1. |
| */ |
| resp->memory_region_attributes |= FFA_MEM_ATTR_NS_BIT; |
| } |
| } |
| |
| /** |
| * spmc_ffa_mem_retrieve_req - FFA_MEM_RETRIEVE_REQ implementation. |
| * @smc_fid: FID of SMC |
| * @total_length: Total length of retrieve request descriptor if this is |
| * the first call. Otherwise (unsupported) must be 0. |
| * @fragment_length: Length of fragment of retrieve request descriptor passed |
| * in this call. Only @fragment_length == @length is |
| * supported by this implementation. |
| * @address: Not supported, must be 0. |
| * @page_count: Not supported, must be 0. |
| * @smc_handle: Handle passed to smc call. Used to return |
| * FFA_MEM_RETRIEVE_RESP. |
| * |
| * Implements a subset of the FF-A FFA_MEM_RETRIEVE_REQ call. |
| * Used by secure os to retrieve memory already shared by non-secure os. |
| * If the data does not fit in a single FFA_MEM_RETRIEVE_RESP message, |
| * the client must call FFA_MEM_FRAG_RX until the full response has been |
| * received. |
| * |
| * Return: @handle on success, error code on failure. |
| */ |
| long |
| spmc_ffa_mem_retrieve_req(uint32_t smc_fid, |
| bool secure_origin, |
| uint32_t total_length, |
| uint32_t fragment_length, |
| uint64_t address, |
| uint32_t page_count, |
| void *cookie, |
| void *handle, |
| uint64_t flags) |
| { |
| int ret; |
| size_t buf_size; |
| size_t copy_size = 0; |
| size_t min_desc_size; |
| size_t out_desc_size = 0; |
| |
| /* |
| * Currently we are only accessing fields that are the same in both the |
| * v1.0 and v1.1 mtd struct therefore we can use a v1.1 struct directly |
| * here. We only need validate against the appropriate struct size. |
| */ |
| struct ffa_mtd *resp; |
| const struct ffa_mtd *req; |
| struct spmc_shmem_obj *obj = NULL; |
| struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
| struct secure_partition_desc *sp_ctx = spmc_get_current_sp_ctx(); |
| |
| if (!secure_origin) { |
| WARN("%s: unsupported retrieve req direction.\n", __func__); |
| return spmc_ffa_error_return(handle, |
| FFA_ERROR_INVALID_PARAMETER); |
| } |
| |
| if (address != 0U || page_count != 0U) { |
| WARN("%s: custom memory region not supported.\n", __func__); |
| return spmc_ffa_error_return(handle, |
| FFA_ERROR_INVALID_PARAMETER); |
| } |
| |
| spin_lock(&mbox->lock); |
| |
| req = mbox->tx_buffer; |
| resp = mbox->rx_buffer; |
| buf_size = mbox->rxtx_page_count * FFA_PAGE_SIZE; |
| |
| if (mbox->rxtx_page_count == 0U) { |
| WARN("%s: buffer pair not registered.\n", __func__); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_mailbox; |
| } |
| |
| if (mbox->state != MAILBOX_STATE_EMPTY) { |
| WARN("%s: RX Buffer is full! %d\n", __func__, mbox->state); |
| ret = FFA_ERROR_DENIED; |
| goto err_unlock_mailbox; |
| } |
| |
| if (fragment_length != total_length) { |
| WARN("%s: fragmented retrieve request not supported.\n", |
| __func__); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_mailbox; |
| } |
| |
| if (req->emad_count == 0U) { |
| WARN("%s: unsupported attribute desc count %u.\n", |
| __func__, obj->desc.emad_count); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_mailbox; |
| } |
| |
| /* Determine the appropriate minimum descriptor size. */ |
| if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| min_desc_size = sizeof(struct ffa_mtd_v1_0); |
| } else { |
| min_desc_size = sizeof(struct ffa_mtd); |
| } |
| if (total_length < min_desc_size) { |
| WARN("%s: invalid length %u < %zu\n", __func__, total_length, |
| min_desc_size); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_mailbox; |
| } |
| |
| spin_lock(&spmc_shmem_obj_state.lock); |
| |
| obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, req->handle); |
| if (obj == NULL) { |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| |
| if (obj->desc_filled != obj->desc_size) { |
| WARN("%s: incomplete object desc filled %zu < size %zu\n", |
| __func__, obj->desc_filled, obj->desc_size); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| |
| if (req->emad_count != 0U && req->sender_id != obj->desc.sender_id) { |
| WARN("%s: wrong sender id 0x%x != 0x%x\n", |
| __func__, req->sender_id, obj->desc.sender_id); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| |
| if (req->emad_count != 0U && req->tag != obj->desc.tag) { |
| WARN("%s: wrong tag 0x%lx != 0x%lx\n", |
| __func__, req->tag, obj->desc.tag); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| |
| if (req->emad_count != 0U && req->emad_count != obj->desc.emad_count) { |
| WARN("%s: mistmatch of endpoint counts %u != %u\n", |
| __func__, req->emad_count, obj->desc.emad_count); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| |
| /* Ensure the NS bit is set to 0 in the request. */ |
| if ((req->memory_region_attributes & FFA_MEM_ATTR_NS_BIT) != 0U) { |
| WARN("%s: NS mem attributes flags MBZ.\n", __func__); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| |
| if (req->flags != 0U) { |
| if ((req->flags & FFA_MTD_FLAG_TYPE_MASK) != |
| (obj->desc.flags & FFA_MTD_FLAG_TYPE_MASK)) { |
| /* |
| * If the retrieve request specifies the memory |
| * transaction ensure it matches what we expect. |
| */ |
| WARN("%s: wrong mem transaction flags %x != %x\n", |
| __func__, req->flags, obj->desc.flags); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| |
| if (req->flags != FFA_MTD_FLAG_TYPE_SHARE_MEMORY && |
| req->flags != FFA_MTD_FLAG_TYPE_LEND_MEMORY) { |
| /* |
| * Current implementation does not support donate and |
| * it supports no other flags. |
| */ |
| WARN("%s: invalid flags 0x%x\n", __func__, req->flags); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| } |
| |
| /* Validate the caller is a valid participant. */ |
| if (!spmc_shmem_obj_validate_id(obj, sp_ctx->sp_id)) { |
| WARN("%s: Invalid endpoint ID (0x%x).\n", |
| __func__, sp_ctx->sp_id); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| |
| /* Validate that the provided emad offset and structure is valid.*/ |
| for (size_t i = 0; i < req->emad_count; i++) { |
| size_t emad_size; |
| struct ffa_emad_v1_0 *emad; |
| |
| emad = spmc_shmem_obj_get_emad(req, i, ffa_version, |
| &emad_size); |
| |
| if ((uintptr_t) emad >= (uintptr_t) |
| ((uint8_t *) req + total_length)) { |
| WARN("Invalid emad access.\n"); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| } |
| |
| /* |
| * Validate all the endpoints match in the case of multiple |
| * borrowers. We don't mandate that the order of the borrowers |
| * must match in the descriptors therefore check to see if the |
| * endpoints match in any order. |
| */ |
| for (size_t i = 0; i < req->emad_count; i++) { |
| bool found = false; |
| size_t emad_size; |
| struct ffa_emad_v1_0 *emad; |
| struct ffa_emad_v1_0 *other_emad; |
| |
| emad = spmc_shmem_obj_get_emad(req, i, ffa_version, |
| &emad_size); |
| |
| for (size_t j = 0; j < obj->desc.emad_count; j++) { |
| other_emad = spmc_shmem_obj_get_emad( |
| &obj->desc, j, MAKE_FFA_VERSION(1, 1), |
| &emad_size); |
| |
| if (req->emad_count && |
| emad->mapd.endpoint_id == |
| other_emad->mapd.endpoint_id) { |
| found = true; |
| break; |
| } |
| } |
| |
| if (!found) { |
| WARN("%s: invalid receiver id (0x%x).\n", |
| __func__, emad->mapd.endpoint_id); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| } |
| |
| mbox->state = MAILBOX_STATE_FULL; |
| |
| if (req->emad_count != 0U) { |
| obj->in_use++; |
| } |
| |
| /* |
| * If the caller is v1.0 convert the descriptor, otherwise copy |
| * directly. |
| */ |
| if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| ret = spmc_populate_ffa_v1_0_descriptor(resp, obj, buf_size, 0, |
| ©_size, |
| &out_desc_size); |
| if (ret != 0U) { |
| ERROR("%s: Failed to process descriptor.\n", __func__); |
| goto err_unlock_all; |
| } |
| } else { |
| copy_size = MIN(obj->desc_size, buf_size); |
| out_desc_size = obj->desc_size; |
| |
| memcpy(resp, &obj->desc, copy_size); |
| } |
| |
| /* Set the NS bit in the response if applicable. */ |
| spmc_ffa_mem_retrieve_set_ns_bit(resp, sp_ctx); |
| |
| spin_unlock(&spmc_shmem_obj_state.lock); |
| spin_unlock(&mbox->lock); |
| |
| SMC_RET8(handle, FFA_MEM_RETRIEVE_RESP, out_desc_size, |
| copy_size, 0, 0, 0, 0, 0); |
| |
| err_unlock_all: |
| spin_unlock(&spmc_shmem_obj_state.lock); |
| err_unlock_mailbox: |
| spin_unlock(&mbox->lock); |
| return spmc_ffa_error_return(handle, ret); |
| } |
| |
| /** |
| * spmc_ffa_mem_frag_rx - FFA_MEM_FRAG_RX implementation. |
| * @client: Client state. |
| * @handle_low: Handle passed to &FFA_MEM_RETRIEVE_REQ. Bit[31:0]. |
| * @handle_high: Handle passed to &FFA_MEM_RETRIEVE_REQ. Bit[63:32]. |
| * @fragment_offset: Byte offset in descriptor to resume at. |
| * @sender_id: Bit[31:16]: Endpoint id of sender if client is a |
| * hypervisor. 0 otherwise. |
| * @smc_handle: Handle passed to smc call. Used to return |
| * FFA_MEM_FRAG_TX. |
| * |
| * Return: @smc_handle on success, error code on failure. |
| */ |
| long spmc_ffa_mem_frag_rx(uint32_t smc_fid, |
| bool secure_origin, |
| uint32_t handle_low, |
| uint32_t handle_high, |
| uint32_t fragment_offset, |
| uint32_t sender_id, |
| void *cookie, |
| void *handle, |
| uint64_t flags) |
| { |
| int ret; |
| void *src; |
| size_t buf_size; |
| size_t copy_size; |
| size_t full_copy_size; |
| uint32_t desc_sender_id; |
| struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| uint64_t mem_handle = handle_low | (((uint64_t)handle_high) << 32); |
| struct spmc_shmem_obj *obj; |
| uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
| |
| if (!secure_origin) { |
| WARN("%s: can only be called from swld.\n", |
| __func__); |
| return spmc_ffa_error_return(handle, |
| FFA_ERROR_INVALID_PARAMETER); |
| } |
| |
| spin_lock(&spmc_shmem_obj_state.lock); |
| |
| obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| if (obj == NULL) { |
| WARN("%s: invalid handle, 0x%lx, not a valid handle.\n", |
| __func__, mem_handle); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_shmem; |
| } |
| |
| desc_sender_id = (uint32_t)obj->desc.sender_id << 16; |
| if (sender_id != 0U && sender_id != desc_sender_id) { |
| WARN("%s: invalid sender_id 0x%x != 0x%x\n", __func__, |
| sender_id, desc_sender_id); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_shmem; |
| } |
| |
| if (fragment_offset >= obj->desc_size) { |
| WARN("%s: invalid fragment_offset 0x%x >= 0x%zx\n", |
| __func__, fragment_offset, obj->desc_size); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_shmem; |
| } |
| |
| spin_lock(&mbox->lock); |
| |
| if (mbox->rxtx_page_count == 0U) { |
| WARN("%s: buffer pair not registered.\n", __func__); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| |
| if (mbox->state != MAILBOX_STATE_EMPTY) { |
| WARN("%s: RX Buffer is full!\n", __func__); |
| ret = FFA_ERROR_DENIED; |
| goto err_unlock_all; |
| } |
| |
| buf_size = mbox->rxtx_page_count * FFA_PAGE_SIZE; |
| |
| mbox->state = MAILBOX_STATE_FULL; |
| |
| /* |
| * If the caller is v1.0 convert the descriptor, otherwise copy |
| * directly. |
| */ |
| if (ffa_version == MAKE_FFA_VERSION(1, 0)) { |
| size_t out_desc_size; |
| |
| ret = spmc_populate_ffa_v1_0_descriptor(mbox->rx_buffer, obj, |
| buf_size, |
| fragment_offset, |
| ©_size, |
| &out_desc_size); |
| if (ret != 0U) { |
| ERROR("%s: Failed to process descriptor.\n", __func__); |
| goto err_unlock_all; |
| } |
| } else { |
| full_copy_size = obj->desc_size - fragment_offset; |
| copy_size = MIN(full_copy_size, buf_size); |
| |
| src = &obj->desc; |
| |
| memcpy(mbox->rx_buffer, src + fragment_offset, copy_size); |
| } |
| |
| spin_unlock(&mbox->lock); |
| spin_unlock(&spmc_shmem_obj_state.lock); |
| |
| SMC_RET8(handle, FFA_MEM_FRAG_TX, handle_low, handle_high, |
| copy_size, sender_id, 0, 0, 0); |
| |
| err_unlock_all: |
| spin_unlock(&mbox->lock); |
| err_unlock_shmem: |
| spin_unlock(&spmc_shmem_obj_state.lock); |
| return spmc_ffa_error_return(handle, ret); |
| } |
| |
| /** |
| * spmc_ffa_mem_relinquish - FFA_MEM_RELINQUISH implementation. |
| * @client: Client state. |
| * |
| * Implements a subset of the FF-A FFA_MEM_RELINQUISH call. |
| * Used by secure os release previously shared memory to non-secure os. |
| * |
| * The handle to release must be in the client's (secure os's) transmit buffer. |
| * |
| * Return: 0 on success, error code on failure. |
| */ |
| int spmc_ffa_mem_relinquish(uint32_t smc_fid, |
| bool secure_origin, |
| uint32_t handle_low, |
| uint32_t handle_high, |
| uint32_t fragment_offset, |
| uint32_t sender_id, |
| void *cookie, |
| void *handle, |
| uint64_t flags) |
| { |
| int ret; |
| struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| struct spmc_shmem_obj *obj; |
| const struct ffa_mem_relinquish_descriptor *req; |
| struct secure_partition_desc *sp_ctx = spmc_get_current_sp_ctx(); |
| |
| if (!secure_origin) { |
| WARN("%s: unsupported relinquish direction.\n", __func__); |
| return spmc_ffa_error_return(handle, |
| FFA_ERROR_INVALID_PARAMETER); |
| } |
| |
| spin_lock(&mbox->lock); |
| |
| if (mbox->rxtx_page_count == 0U) { |
| WARN("%s: buffer pair not registered.\n", __func__); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_mailbox; |
| } |
| |
| req = mbox->tx_buffer; |
| |
| if (req->flags != 0U) { |
| WARN("%s: unsupported flags 0x%x\n", __func__, req->flags); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_mailbox; |
| } |
| |
| if (req->endpoint_count == 0) { |
| WARN("%s: endpoint count cannot be 0.\n", __func__); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_mailbox; |
| } |
| |
| spin_lock(&spmc_shmem_obj_state.lock); |
| |
| obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, req->handle); |
| if (obj == NULL) { |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| |
| /* |
| * Validate the endpoint ID was populated correctly. We don't currently |
| * support proxy endpoints so the endpoint count should always be 1. |
| */ |
| if (req->endpoint_count != 1U) { |
| WARN("%s: unsupported endpoint count %u != 1\n", __func__, |
| req->endpoint_count); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| |
| /* Validate provided endpoint ID matches the partition ID. */ |
| if (req->endpoint_array[0] != sp_ctx->sp_id) { |
| WARN("%s: invalid endpoint ID %u != %u\n", __func__, |
| req->endpoint_array[0], sp_ctx->sp_id); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| |
| /* Validate the caller is a valid participant. */ |
| if (!spmc_shmem_obj_validate_id(obj, sp_ctx->sp_id)) { |
| WARN("%s: Invalid endpoint ID (0x%x).\n", |
| __func__, req->endpoint_array[0]); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| |
| if (obj->in_use == 0U) { |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock_all; |
| } |
| obj->in_use--; |
| |
| spin_unlock(&spmc_shmem_obj_state.lock); |
| spin_unlock(&mbox->lock); |
| |
| SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| |
| err_unlock_all: |
| spin_unlock(&spmc_shmem_obj_state.lock); |
| err_unlock_mailbox: |
| spin_unlock(&mbox->lock); |
| return spmc_ffa_error_return(handle, ret); |
| } |
| |
| /** |
| * spmc_ffa_mem_reclaim - FFA_MEM_RECLAIM implementation. |
| * @client: Client state. |
| * @handle_low: Unique handle of shared memory object to reclaim. Bit[31:0]. |
| * @handle_high: Unique handle of shared memory object to reclaim. |
| * Bit[63:32]. |
| * @flags: Unsupported, ignored. |
| * |
| * Implements a subset of the FF-A FFA_MEM_RECLAIM call. |
| * Used by non-secure os reclaim memory previously shared with secure os. |
| * |
| * Return: 0 on success, error code on failure. |
| */ |
| int spmc_ffa_mem_reclaim(uint32_t smc_fid, |
| bool secure_origin, |
| uint32_t handle_low, |
| uint32_t handle_high, |
| uint32_t mem_flags, |
| uint64_t x4, |
| void *cookie, |
| void *handle, |
| uint64_t flags) |
| { |
| int ret; |
| struct spmc_shmem_obj *obj; |
| uint64_t mem_handle = handle_low | (((uint64_t)handle_high) << 32); |
| |
| if (secure_origin) { |
| WARN("%s: unsupported reclaim direction.\n", __func__); |
| return spmc_ffa_error_return(handle, |
| FFA_ERROR_INVALID_PARAMETER); |
| } |
| |
| if (mem_flags != 0U) { |
| WARN("%s: unsupported flags 0x%x\n", __func__, mem_flags); |
| return spmc_ffa_error_return(handle, |
| FFA_ERROR_INVALID_PARAMETER); |
| } |
| |
| spin_lock(&spmc_shmem_obj_state.lock); |
| |
| obj = spmc_shmem_obj_lookup(&spmc_shmem_obj_state, mem_handle); |
| if (obj == NULL) { |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock; |
| } |
| if (obj->in_use != 0U) { |
| ret = FFA_ERROR_DENIED; |
| goto err_unlock; |
| } |
| |
| if (obj->desc_filled != obj->desc_size) { |
| WARN("%s: incomplete object desc filled %zu < size %zu\n", |
| __func__, obj->desc_filled, obj->desc_size); |
| ret = FFA_ERROR_INVALID_PARAMETER; |
| goto err_unlock; |
| } |
| |
| /* Allow for platform specific operations to be performed. */ |
| ret = plat_spmc_shmem_reclaim(&obj->desc); |
| if (ret != 0) { |
| goto err_unlock; |
| } |
| |
| spmc_shmem_obj_free(&spmc_shmem_obj_state, obj); |
| spin_unlock(&spmc_shmem_obj_state.lock); |
| |
| SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| |
| err_unlock: |
| spin_unlock(&spmc_shmem_obj_state.lock); |
| return spmc_ffa_error_return(handle, ret); |
| } |