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/*
* Copyright (c) 2022, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef EL3_SPMC_FFA_MEM_H
#define EL3_SPMC_FFA_MEM_H
#include <assert.h>
/*
* Subset of Arm Firmware Framework for Armv8-A
* (https://developer.arm.com/docs/den0077/a) needed for shared memory.
*/
/**
* typedef ffa_endpoint_id16_t - Endpoint ID
*
* Current implementation only supports VM IDs. FF-A spec also support stream
* endpoint ids.
*/
typedef uint16_t ffa_endpoint_id16_t;
/**
* struct ffa_cons_mrd - Constituent memory region descriptor
* @address:
* Start address of contiguous memory region. Must be 4K page aligned.
* @page_count:
* Number of 4K pages in region.
* @reserved_12_15:
* Reserve bytes 12-15 to pad struct size to 16 bytes.
*/
struct ffa_cons_mrd {
uint64_t address;
uint32_t page_count;
uint32_t reserved_12_15;
};
CASSERT(sizeof(struct ffa_cons_mrd) == 16, assert_ffa_cons_mrd_size_mismatch);
/**
* struct ffa_comp_mrd - Composite memory region descriptor
* @total_page_count:
* Number of 4k pages in memory region. Must match sum of
* @address_range_array[].page_count.
* @address_range_count:
* Number of entries in @address_range_array.
* @reserved_8_15:
* Reserve bytes 8-15 to pad struct size to 16 byte alignment and
* make @address_range_array 16 byte aligned.
* @address_range_array:
* Array of &struct ffa_cons_mrd entries.
*/
struct ffa_comp_mrd {
uint32_t total_page_count;
uint32_t address_range_count;
uint64_t reserved_8_15;
struct ffa_cons_mrd address_range_array[];
};
CASSERT(sizeof(struct ffa_comp_mrd) == 16, assert_ffa_comp_mrd_size_mismatch);
/**
* typedef ffa_mem_attr8_t - Memory region attributes v1.0.
* typedef ffa_mem_attr16_t - Memory region attributes v1.1.
*
* * @FFA_MEM_ATTR_NS_BIT:
* Memory security state.
* * @FFA_MEM_ATTR_DEVICE_NGNRNE:
* Device-nGnRnE.
* * @FFA_MEM_ATTR_DEVICE_NGNRE:
* Device-nGnRE.
* * @FFA_MEM_ATTR_DEVICE_NGRE:
* Device-nGRE.
* * @FFA_MEM_ATTR_DEVICE_GRE:
* Device-GRE.
* * @FFA_MEM_ATTR_NORMAL_MEMORY_UNCACHED
* Normal memory. Non-cacheable.
* * @FFA_MEM_ATTR_NORMAL_MEMORY_CACHED_WB
* Normal memory. Write-back cached.
* * @FFA_MEM_ATTR_NON_SHAREABLE
* Non-shareable. Combine with FFA_MEM_ATTR_NORMAL_MEMORY_*.
* * @FFA_MEM_ATTR_OUTER_SHAREABLE
* Outer Shareable. Combine with FFA_MEM_ATTR_NORMAL_MEMORY_*.
* * @FFA_MEM_ATTR_INNER_SHAREABLE
* Inner Shareable. Combine with FFA_MEM_ATTR_NORMAL_MEMORY_*.
*/
typedef uint8_t ffa_mem_attr8_t;
typedef uint16_t ffa_mem_attr16_t;
#define FFA_MEM_ATTR_NS_BIT (0x1U << 6)
#define FFA_MEM_ATTR_DEVICE_NGNRNE ((1U << 4) | (0x0U << 2))
#define FFA_MEM_ATTR_DEVICE_NGNRE ((1U << 4) | (0x1U << 2))
#define FFA_MEM_ATTR_DEVICE_NGRE ((1U << 4) | (0x2U << 2))
#define FFA_MEM_ATTR_DEVICE_GRE ((1U << 4) | (0x3U << 2))
#define FFA_MEM_ATTR_NORMAL_MEMORY_UNCACHED ((2U << 4) | (0x1U << 2))
#define FFA_MEM_ATTR_NORMAL_MEMORY_CACHED_WB ((2U << 4) | (0x3U << 2))
#define FFA_MEM_ATTR_NON_SHAREABLE (0x0U << 0)
#define FFA_MEM_ATTR_OUTER_SHAREABLE (0x2U << 0)
#define FFA_MEM_ATTR_INNER_SHAREABLE (0x3U << 0)
/**
* typedef ffa_mem_perm8_t - Memory access permissions
*
* * @FFA_MEM_ATTR_RO
* Request or specify read-only mapping.
* * @FFA_MEM_ATTR_RW
* Request or allow read-write mapping.
* * @FFA_MEM_PERM_NX
* Deny executable mapping.
* * @FFA_MEM_PERM_X
* Request executable mapping.
*/
typedef uint8_t ffa_mem_perm8_t;
#define FFA_MEM_PERM_RO (1U << 0)
#define FFA_MEM_PERM_RW (1U << 1)
#define FFA_MEM_PERM_NX (1U << 2)
#define FFA_MEM_PERM_X (1U << 3)
/**
* typedef ffa_mem_flag8_t - Endpoint memory flags
*
* * @FFA_MEM_FLAG_NON_RETRIEVAL_BORROWER
* Non-retrieval Borrower. Memory region must not be or was not retrieved on
* behalf of this endpoint.
*/
typedef uint8_t ffa_mem_flag8_t;
#define FFA_MEM_FLAG_NON_RETRIEVAL_BORROWER (1U << 0)
/**
* typedef ffa_mtd_flag32_t - Memory transaction descriptor flags
*
* * @FFA_MTD_FLAG_ZERO_MEMORY
* Zero memory after unmapping from sender (must be 0 for share).
* * @FFA_MTD_FLAG_TIME_SLICING
* Not supported by this implementation.
* * @FFA_MTD_FLAG_ZERO_MEMORY_AFTER_RELINQUISH
* Zero memory after unmapping from borrowers (must be 0 for share).
* * @FFA_MTD_FLAG_TYPE_MASK
* Bit-mask to extract memory management transaction type from flags.
* * @FFA_MTD_FLAG_TYPE_SHARE_MEMORY
* Share memory transaction flag.
* Used by @SMC_FC_FFA_MEM_RETRIEVE_RESP to indicate that memory came from
* @SMC_FC_FFA_MEM_SHARE and by @SMC_FC_FFA_MEM_RETRIEVE_REQ to specify that
* it must have.
* * @FFA_MTD_FLAG_ADDRESS_RANGE_ALIGNMENT_HINT_MASK
* Not supported by this implementation.
*/
typedef uint32_t ffa_mtd_flag32_t;
#define FFA_MTD_FLAG_ZERO_MEMORY (1U << 0)
#define FFA_MTD_FLAG_TIME_SLICING (1U << 1)
#define FFA_MTD_FLAG_ZERO_MEMORY_AFTER_RELINQUISH (1U << 2)
#define FFA_MTD_FLAG_TYPE_MASK (3U << 3)
#define FFA_MTD_FLAG_TYPE_SHARE_MEMORY (1U << 3)
#define FFA_MTD_FLAG_TYPE_LEND_MEMORY (1U << 4)
#define FFA_MTD_FLAG_ADDRESS_RANGE_ALIGNMENT_HINT_MASK (0x1FU << 5)
/**
* struct ffa_mapd - Memory access permissions descriptor
* @endpoint_id:
* Endpoint id that @memory_access_permissions and @flags apply to.
* (&typedef ffa_endpoint_id16_t).
* @memory_access_permissions:
* FFA_MEM_PERM_* values or'ed together (&typedef ffa_mem_perm8_t).
* @flags:
* FFA_MEM_FLAG_* values or'ed together (&typedef ffa_mem_flag8_t).
*/
struct ffa_mapd {
ffa_endpoint_id16_t endpoint_id;
ffa_mem_perm8_t memory_access_permissions;
ffa_mem_flag8_t flags;
};
CASSERT(sizeof(struct ffa_mapd) == 4, assert_ffa_mapd_size_mismatch);
/**
* struct ffa_emad_v1_0 - Endpoint memory access descriptor.
* @mapd: &struct ffa_mapd.
* @comp_mrd_offset:
* Offset of &struct ffa_comp_mrd from start of &struct ffa_mtd_v1_0.
* @reserved_8_15:
* Reserved bytes 8-15. Must be 0.
*/
struct ffa_emad_v1_0 {
struct ffa_mapd mapd;
uint32_t comp_mrd_offset;
uint64_t reserved_8_15;
};
CASSERT(sizeof(struct ffa_emad_v1_0) == 16, assert_ffa_emad_v1_0_size_mismatch);
/**
* struct ffa_mtd_v1_0 - Memory transaction descriptor.
* @sender_id:
* Sender endpoint id.
* @memory_region_attributes:
* FFA_MEM_ATTR_* values or'ed together (&typedef ffa_mem_attr8_t).
* @reserved_3:
* Reserved bytes 3. Must be 0.
* @flags:
* FFA_MTD_FLAG_* values or'ed together (&typedef ffa_mtd_flag32_t).
* @handle:
* Id of shared memory object. Must be 0 for MEM_SHARE or MEM_LEND.
* @tag: Client allocated tag. Must match original value.
* @reserved_24_27:
* Reserved bytes 24-27. Must be 0.
* @emad_count:
* Number of entries in @emad.
* @emad:
* Endpoint memory access descriptor array (see @struct ffa_emad_v1_0).
*/
struct ffa_mtd_v1_0 {
ffa_endpoint_id16_t sender_id;
ffa_mem_attr8_t memory_region_attributes;
uint8_t reserved_3;
ffa_mtd_flag32_t flags;
uint64_t handle;
uint64_t tag;
uint32_t reserved_24_27;
uint32_t emad_count;
struct ffa_emad_v1_0 emad[];
};
CASSERT(sizeof(struct ffa_mtd_v1_0) == 32, assert_ffa_mtd_size_v1_0_mismatch);
/**
* struct ffa_mtd - Memory transaction descriptor for FF-A v1.1.
* @sender_id:
* Sender endpoint id.
* @memory_region_attributes:
* FFA_MEM_ATTR_* values or'ed together (&typedef ffa_mem_attr16_t).
* @flags:
* FFA_MTD_FLAG_* values or'ed together (&typedef ffa_mtd_flag32_t).
* @handle:
* Id of shared memory object. Must be 0 for MEM_SHARE or MEM_LEND.
* @tag: Client allocated tag. Must match original value.
* @emad_size:
* Size of the emad descriptor.
* @emad_count:
* Number of entries in the emad array.
* @emad_offset:
* Offset from the beginning of the descriptor to the location of the
* memory access descriptor array (see @struct ffa_emad_v1_0).
* @reserved_36_39:
* Reserved bytes 36-39. Must be 0.
* @reserved_40_47:
* Reserved bytes 44-47. Must be 0.
*/
struct ffa_mtd {
ffa_endpoint_id16_t sender_id;
ffa_mem_attr16_t memory_region_attributes;
ffa_mtd_flag32_t flags;
uint64_t handle;
uint64_t tag;
uint32_t emad_size;
uint32_t emad_count;
uint32_t emad_offset;
uint32_t reserved_36_39;
uint64_t reserved_40_47;
};
CASSERT(sizeof(struct ffa_mtd) == 48, assert_ffa_mtd_size_mismatch);
#endif /* EL3_SPMC_FFA_MEM_H */
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