1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (c) 2015, Linaro Limited 4 */ 5 6 #ifndef OPTEE_PRIVATE_H 7 #define OPTEE_PRIVATE_H 8 9 #include <linux/arm-smccc.h> 10 #include <linux/semaphore.h> 11 #include <linux/tee_drv.h> 12 #include <linux/types.h> 13 #include "optee_msg.h" 14 15 #define OPTEE_MAX_ARG_SIZE 1024 16 17 /* Some Global Platform error codes used in this driver */ 18 #define TEEC_SUCCESS 0x00000000 19 #define TEEC_ERROR_BAD_PARAMETERS 0xFFFF0006 20 #define TEEC_ERROR_NOT_SUPPORTED 0xFFFF000A 21 #define TEEC_ERROR_COMMUNICATION 0xFFFF000E 22 #define TEEC_ERROR_OUT_OF_MEMORY 0xFFFF000C 23 #define TEEC_ERROR_SHORT_BUFFER 0xFFFF0010 24 25 #define TEEC_ORIGIN_COMMS 0x00000002 26 27 typedef void (optee_invoke_fn)(unsigned long, unsigned long, unsigned long, 28 unsigned long, unsigned long, unsigned long, 29 unsigned long, unsigned long, 30 struct arm_smccc_res *); 31 32 struct optee_call_queue { 33 /* Serializes access to this struct */ 34 struct mutex mutex; 35 struct list_head waiters; 36 }; 37 38 struct optee_wait_queue { 39 /* Serializes access to this struct */ 40 struct mutex mu; 41 struct list_head db; 42 }; 43 44 /** 45 * struct optee_supp - supplicant synchronization struct 46 * @ctx the context of current connected supplicant. 47 * if !NULL the supplicant device is available for use, 48 * else busy 49 * @mutex: held while accessing content of this struct 50 * @req_id: current request id if supplicant is doing synchronous 51 * communication, else -1 52 * @reqs: queued request not yet retrieved by supplicant 53 * @idr: IDR holding all requests currently being processed 54 * by supplicant 55 * @reqs_c: completion used by supplicant when waiting for a 56 * request to be queued. 57 */ 58 struct optee_supp { 59 /* Serializes access to this struct */ 60 struct mutex mutex; 61 struct tee_context *ctx; 62 63 int req_id; 64 struct list_head reqs; 65 struct idr idr; 66 struct completion reqs_c; 67 }; 68 69 /** 70 * struct optee - main service struct 71 * @supp_teedev: supplicant device 72 * @teedev: client device 73 * @invoke_fn: function to issue smc or hvc 74 * @call_queue: queue of threads waiting to call @invoke_fn 75 * @wait_queue: queue of threads from secure world waiting for a 76 * secure world sync object 77 * @supp: supplicant synchronization struct for RPC to supplicant 78 * @pool: shared memory pool 79 * @memremaped_shm virtual address of memory in shared memory pool 80 * @sec_caps: secure world capabilities defined by 81 * OPTEE_SMC_SEC_CAP_* in optee_smc.h 82 * @scan_bus_done flag if device registation was already done. 83 * @scan_bus_wq workqueue to scan optee bus and register optee drivers 84 * @scan_bus_work workq to scan optee bus and register optee drivers 85 */ 86 struct optee { 87 struct tee_device *supp_teedev; 88 struct tee_device *teedev; 89 optee_invoke_fn *invoke_fn; 90 struct optee_call_queue call_queue; 91 struct optee_wait_queue wait_queue; 92 struct optee_supp supp; 93 struct tee_shm_pool *pool; 94 void *memremaped_shm; 95 u32 sec_caps; 96 bool scan_bus_done; 97 struct workqueue_struct *scan_bus_wq; 98 struct work_struct scan_bus_work; 99 }; 100 101 struct optee_session { 102 struct list_head list_node; 103 u32 session_id; 104 }; 105 106 struct optee_context_data { 107 /* Serializes access to this struct */ 108 struct mutex mutex; 109 struct list_head sess_list; 110 }; 111 112 struct optee_rpc_param { 113 u32 a0; 114 u32 a1; 115 u32 a2; 116 u32 a3; 117 u32 a4; 118 u32 a5; 119 u32 a6; 120 u32 a7; 121 }; 122 123 /* Holds context that is preserved during one STD call */ 124 struct optee_call_ctx { 125 /* information about pages list used in last allocation */ 126 void *pages_list; 127 size_t num_entries; 128 }; 129 130 void optee_handle_rpc(struct tee_context *ctx, struct optee_rpc_param *param, 131 struct optee_call_ctx *call_ctx); 132 void optee_rpc_finalize_call(struct optee_call_ctx *call_ctx); 133 134 void optee_wait_queue_init(struct optee_wait_queue *wq); 135 void optee_wait_queue_exit(struct optee_wait_queue *wq); 136 137 u32 optee_supp_thrd_req(struct tee_context *ctx, u32 func, size_t num_params, 138 struct tee_param *param); 139 140 int optee_supp_read(struct tee_context *ctx, void __user *buf, size_t len); 141 int optee_supp_write(struct tee_context *ctx, void __user *buf, size_t len); 142 void optee_supp_init(struct optee_supp *supp); 143 void optee_supp_uninit(struct optee_supp *supp); 144 void optee_supp_release(struct optee_supp *supp); 145 146 int optee_supp_recv(struct tee_context *ctx, u32 *func, u32 *num_params, 147 struct tee_param *param); 148 int optee_supp_send(struct tee_context *ctx, u32 ret, u32 num_params, 149 struct tee_param *param); 150 151 u32 optee_do_call_with_arg(struct tee_context *ctx, phys_addr_t parg); 152 int optee_open_session(struct tee_context *ctx, 153 struct tee_ioctl_open_session_arg *arg, 154 struct tee_param *param); 155 int optee_close_session(struct tee_context *ctx, u32 session); 156 int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg, 157 struct tee_param *param); 158 int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session); 159 160 void optee_enable_shm_cache(struct optee *optee); 161 void optee_disable_shm_cache(struct optee *optee); 162 163 int optee_shm_register(struct tee_context *ctx, struct tee_shm *shm, 164 struct page **pages, size_t num_pages, 165 unsigned long start); 166 int optee_shm_unregister(struct tee_context *ctx, struct tee_shm *shm); 167 168 int optee_shm_register_supp(struct tee_context *ctx, struct tee_shm *shm, 169 struct page **pages, size_t num_pages, 170 unsigned long start); 171 int optee_shm_unregister_supp(struct tee_context *ctx, struct tee_shm *shm); 172 173 int optee_from_msg_param(struct tee_param *params, size_t num_params, 174 const struct optee_msg_param *msg_params); 175 int optee_to_msg_param(struct optee_msg_param *msg_params, size_t num_params, 176 const struct tee_param *params); 177 178 u64 *optee_allocate_pages_list(size_t num_entries); 179 void optee_free_pages_list(void *array, size_t num_entries); 180 void optee_fill_pages_list(u64 *dst, struct page **pages, int num_pages, 181 size_t page_offset); 182 183 #define PTA_CMD_GET_DEVICES 0x0 184 #define PTA_CMD_GET_DEVICES_SUPP 0x1 185 int optee_enumerate_devices(u32 func); 186 187 /* 188 * Small helpers 189 */ 190 191 static inline void *reg_pair_to_ptr(u32 reg0, u32 reg1) 192 { 193 return (void *)(unsigned long)(((u64)reg0 << 32) | reg1); 194 } 195 196 static inline void reg_pair_from_64(u32 *reg0, u32 *reg1, u64 val) 197 { 198 *reg0 = val >> 32; 199 *reg1 = val; 200 } 201 202 #endif /*OPTEE_PRIVATE_H*/ 203