1 /* SPDX-License-Identifier: BSD-2-Clause */ 2 /* 3 * Copyright (c) 2021-2022, Arm Limited. 4 */ 5 6 #ifndef __MM_SP_MEM_H 7 #define __MM_SP_MEM_H 8 9 #include <ffa.h> 10 #include <mm/fobj.h> 11 #include <sys/queue.h> 12 13 struct sp_mem; 14 15 /* 16 * struct sp_mem_receiver - Memory object instance for a FF-A receiver endpoint 17 * 18 * @perm: Receiver permission on the shared memory 19 * @ref_count: Count retrieve requests from endpoint 20 * @smem: Shared memory reference 21 * @link: Link in related list 22 */ 23 struct sp_mem_receiver { 24 struct ffa_mem_access_perm perm; 25 uint8_t ref_count; 26 struct sp_mem *smem; 27 28 SLIST_ENTRY(sp_mem_receiver) link; 29 }; 30 31 /* 32 * sp_mem_map_region represents the memory address when using FF-A shares. 33 * Instead of storing the physical addresses and the size of the region, we use 34 * the mobj's which were already used by the SPs. The offset is used to point 35 * to the specific location inside the mobj memory range. 36 */ 37 struct sp_mem_map_region { 38 struct mobj *mobj; 39 /* 40 * Offset (in pages) inside the mobj which is used to retrieve the 41 * location. 42 */ 43 uint32_t page_offset; 44 uint32_t page_count; 45 46 SLIST_ENTRY(sp_mem_map_region) link; 47 }; 48 49 SLIST_HEAD(sp_mem_receiver_head, sp_mem_receiver); 50 SLIST_HEAD(sp_mem_regions_head, sp_mem_map_region); 51 52 /* 53 * sp_mem is used as the main place to store the FF-A shares information. 54 * For each FFA_SHARE message a new sp_mem object is created. 55 * The receivers field is used to store all receiver specific information. 56 * The regions field is used to store all data needed for retrieving the 57 * shared addresses. 58 */ 59 struct sp_mem { 60 struct sp_mem_regions_head regions; 61 struct sp_mem_receiver_head receivers; 62 /* Data which was passed inside struct ffa_mem_transaction */ 63 uint16_t sender_id; 64 uint8_t mem_reg_attr; 65 uint32_t flags; 66 uint64_t global_handle; 67 uint64_t tag; 68 69 SLIST_ENTRY(sp_mem) link; 70 }; 71 72 struct sp_mem *sp_mem_new(void); 73 struct sp_mem_receiver *sp_mem_get_receiver(uint32_t s_id, struct sp_mem *smem); 74 struct sp_mem *sp_mem_get(uint64_t handle); 75 76 bool sp_mem_is_shared(struct sp_mem_map_region *new_reg); 77 void *sp_mem_get_va(const struct user_mode_ctx *uctx, size_t offset, 78 struct mobj *mobj); 79 void sp_mem_remove(struct sp_mem *s_mem); 80 void sp_mem_add(struct sp_mem *smem); 81 struct mobj *sp_mem_new_mobj(uint64_t pages, uint32_t mem_type, bool is_secure); 82 int sp_mem_add_pages(struct mobj *mobj, unsigned int *idx, 83 paddr_t pa, unsigned int num_pages); 84 #endif /*__MM_SP_MEM_H*/ 85