1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (c) 2015-2021, Linaro Limited
6 #ifndef OPTEE_PRIVATE_H
7 #define OPTEE_PRIVATE_H
9 #include <linux/arm-smccc.h>
10 #include <linux/rhashtable.h>
11 #include <linux/semaphore.h>
12 #include <linux/tee_drv.h>
13 #include <linux/types.h>
14 #include "optee_msg.h"
16 #define DRIVER_NAME "optee"
18 #define OPTEE_MAX_ARG_SIZE 1024
20 /* Some Global Platform error codes used in this driver */
21 #define TEEC_SUCCESS 0x00000000
22 #define TEEC_ERROR_BAD_PARAMETERS 0xFFFF0006
23 #define TEEC_ERROR_NOT_SUPPORTED 0xFFFF000A
24 #define TEEC_ERROR_COMMUNICATION 0xFFFF000E
25 #define TEEC_ERROR_OUT_OF_MEMORY 0xFFFF000C
26 #define TEEC_ERROR_BUSY 0xFFFF000D
27 #define TEEC_ERROR_SHORT_BUFFER 0xFFFF0010
29 #define TEEC_ORIGIN_COMMS 0x00000002
32 * This value should be larger than the number threads in secure world to
33 * meet the need from secure world. The number of threads in secure world
34 * are usually not even close to 255 so we should be safe for now.
36 #define OPTEE_DEFAULT_MAX_NOTIF_VALUE 255
38 typedef void (optee_invoke_fn)(unsigned long, unsigned long, unsigned long,
39 unsigned long, unsigned long, unsigned long,
40 unsigned long, unsigned long,
41 struct arm_smccc_res *);
43 struct optee_call_waiter {
44 struct list_head list_node;
48 struct optee_call_queue {
49 /* Serializes access to this struct */
51 struct list_head waiters;
56 /* Serializes access to the elements below in this struct */
63 * struct optee_supp - supplicant synchronization struct
64 * @ctx the context of current connected supplicant.
65 * if !NULL the supplicant device is available for use,
67 * @mutex: held while accessing content of this struct
68 * @req_id: current request id if supplicant is doing synchronous
69 * communication, else -1
70 * @reqs: queued request not yet retrieved by supplicant
71 * @idr: IDR holding all requests currently being processed
73 * @reqs_c: completion used by supplicant when waiting for a
74 * request to be queued.
77 /* Serializes access to this struct */
79 struct tee_context *ctx;
82 struct list_head reqs;
84 struct completion reqs_c;
88 optee_invoke_fn *invoke_fn;
91 unsigned int notif_irq;
95 * struct optee_ffa_data - FFA communication struct
96 * @ffa_dev FFA device, contains the destination id, the id of
97 * OP-TEE in secure world
98 * @ffa_ops FFA operations
99 * @mutex Serializes access to @global_ids
100 * @global_ids FF-A shared memory global handle translation
103 struct ffa_device *ffa_dev;
104 const struct ffa_dev_ops *ffa_ops;
105 /* Serializes access to @global_ids */
107 struct rhashtable global_ids;
113 * struct optee_ops - OP-TEE driver internal operations
114 * @do_call_with_arg: enters OP-TEE in secure world
115 * @to_msg_param: converts from struct tee_param to OPTEE_MSG parameters
116 * @from_msg_param: converts from OPTEE_MSG parameters to struct tee_param
118 * These OPs are only supposed to be used internally in the OP-TEE driver
119 * as a way of abstracting the different methogs of entering OP-TEE in
123 int (*do_call_with_arg)(struct tee_context *ctx,
124 struct tee_shm *shm_arg);
125 int (*to_msg_param)(struct optee *optee,
126 struct optee_msg_param *msg_params,
127 size_t num_params, const struct tee_param *params);
128 int (*from_msg_param)(struct optee *optee, struct tee_param *params,
130 const struct optee_msg_param *msg_params);
134 * struct optee - main service struct
135 * @supp_teedev: supplicant device
136 * @teedev: client device
137 * @ops: internal callbacks for different ways to reach secure
139 * @ctx: driver internal TEE context
140 * @smc: specific to SMC ABI
141 * @ffa: specific to FF-A ABI
142 * @call_queue: queue of threads waiting to call @invoke_fn
143 * @notif: notification synchronization struct
144 * @supp: supplicant synchronization struct for RPC to supplicant
145 * @pool: shared memory pool
146 * @rpc_arg_count: If > 0 number of RPC parameters to make room for
147 * @scan_bus_done flag if device registation was already done.
148 * @scan_bus_wq workqueue to scan optee bus and register optee drivers
149 * @scan_bus_work workq to scan optee bus and register optee drivers
152 struct tee_device *supp_teedev;
153 struct tee_device *teedev;
154 const struct optee_ops *ops;
155 struct tee_context *ctx;
157 struct optee_smc smc;
158 struct optee_ffa ffa;
160 struct optee_call_queue call_queue;
161 struct optee_notif notif;
162 struct optee_supp supp;
163 struct tee_shm_pool *pool;
164 unsigned int rpc_arg_count;
166 struct workqueue_struct *scan_bus_wq;
167 struct work_struct scan_bus_work;
170 struct optee_session {
171 struct list_head list_node;
175 struct optee_context_data {
176 /* Serializes access to this struct */
178 struct list_head sess_list;
181 struct optee_rpc_param {
192 /* Holds context that is preserved during one STD call */
193 struct optee_call_ctx {
194 /* information about pages list used in last allocation */
199 int optee_notif_init(struct optee *optee, u_int max_key);
200 void optee_notif_uninit(struct optee *optee);
201 int optee_notif_wait(struct optee *optee, u_int key);
202 int optee_notif_send(struct optee *optee, u_int key);
204 u32 optee_supp_thrd_req(struct tee_context *ctx, u32 func, size_t num_params,
205 struct tee_param *param);
207 int optee_supp_read(struct tee_context *ctx, void __user *buf, size_t len);
208 int optee_supp_write(struct tee_context *ctx, void __user *buf, size_t len);
209 void optee_supp_init(struct optee_supp *supp);
210 void optee_supp_uninit(struct optee_supp *supp);
211 void optee_supp_release(struct optee_supp *supp);
213 int optee_supp_recv(struct tee_context *ctx, u32 *func, u32 *num_params,
214 struct tee_param *param);
215 int optee_supp_send(struct tee_context *ctx, u32 ret, u32 num_params,
216 struct tee_param *param);
218 int optee_open_session(struct tee_context *ctx,
219 struct tee_ioctl_open_session_arg *arg,
220 struct tee_param *param);
221 int optee_close_session_helper(struct tee_context *ctx, u32 session);
222 int optee_close_session(struct tee_context *ctx, u32 session);
223 int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg,
224 struct tee_param *param);
225 int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session);
227 #define PTA_CMD_GET_DEVICES 0x0
228 #define PTA_CMD_GET_DEVICES_SUPP 0x1
229 int optee_enumerate_devices(u32 func);
230 void optee_unregister_devices(void);
232 int optee_pool_op_alloc_helper(struct tee_shm_pool_mgr *poolm,
233 struct tee_shm *shm, size_t size,
234 int (*shm_register)(struct tee_context *ctx,
238 unsigned long start));
241 void optee_remove_common(struct optee *optee);
242 int optee_open(struct tee_context *ctx, bool cap_memref_null);
243 void optee_release(struct tee_context *ctx);
244 void optee_release_supp(struct tee_context *ctx);
246 static inline void optee_from_msg_param_value(struct tee_param *p, u32 attr,
247 const struct optee_msg_param *mp)
249 p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT +
250 attr - OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
251 p->u.value.a = mp->u.value.a;
252 p->u.value.b = mp->u.value.b;
253 p->u.value.c = mp->u.value.c;
256 static inline void optee_to_msg_param_value(struct optee_msg_param *mp,
257 const struct tee_param *p)
259 mp->attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT + p->attr -
260 TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT;
261 mp->u.value.a = p->u.value.a;
262 mp->u.value.b = p->u.value.b;
263 mp->u.value.c = p->u.value.c;
266 void optee_cq_wait_init(struct optee_call_queue *cq,
267 struct optee_call_waiter *w);
268 void optee_cq_wait_for_completion(struct optee_call_queue *cq,
269 struct optee_call_waiter *w);
270 void optee_cq_wait_final(struct optee_call_queue *cq,
271 struct optee_call_waiter *w);
272 int optee_check_mem_type(unsigned long start, size_t num_pages);
273 struct tee_shm *optee_get_msg_arg(struct tee_context *ctx, size_t num_params,
274 struct optee_msg_arg **msg_arg);
276 struct tee_shm *optee_rpc_cmd_alloc_suppl(struct tee_context *ctx, size_t sz);
277 void optee_rpc_cmd_free_suppl(struct tee_context *ctx, struct tee_shm *shm);
278 void optee_rpc_cmd(struct tee_context *ctx, struct optee *optee,
279 struct optee_msg_arg *arg);
285 static inline void *reg_pair_to_ptr(u32 reg0, u32 reg1)
287 return (void *)(unsigned long)(((u64)reg0 << 32) | reg1);
290 static inline void reg_pair_from_64(u32 *reg0, u32 *reg1, u64 val)
296 /* Registration of the ABIs */
297 int optee_smc_abi_register(void);
298 void optee_smc_abi_unregister(void);
299 int optee_ffa_abi_register(void);
300 void optee_ffa_abi_unregister(void);
302 #endif /*OPTEE_PRIVATE_H*/