Linux 5.1.15
[linux/fpc-iii.git] / drivers / tee / optee / optee_private.h
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1 /*
2 * Copyright (c) 2015, Linaro Limited
4 * This software is licensed under the terms of the GNU General Public
5 * License version 2, as published by the Free Software Foundation, and
6 * may be copied, distributed, and modified under those terms.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
15 #ifndef OPTEE_PRIVATE_H
16 #define OPTEE_PRIVATE_H
18 #include <linux/arm-smccc.h>
19 #include <linux/semaphore.h>
20 #include <linux/tee_drv.h>
21 #include <linux/types.h>
22 #include "optee_msg.h"
24 #define OPTEE_MAX_ARG_SIZE 1024
26 /* Some Global Platform error codes used in this driver */
27 #define TEEC_SUCCESS 0x00000000
28 #define TEEC_ERROR_BAD_PARAMETERS 0xFFFF0006
29 #define TEEC_ERROR_COMMUNICATION 0xFFFF000E
30 #define TEEC_ERROR_OUT_OF_MEMORY 0xFFFF000C
31 #define TEEC_ERROR_SHORT_BUFFER 0xFFFF0010
33 #define TEEC_ORIGIN_COMMS 0x00000002
35 typedef void (optee_invoke_fn)(unsigned long, unsigned long, unsigned long,
36 unsigned long, unsigned long, unsigned long,
37 unsigned long, unsigned long,
38 struct arm_smccc_res *);
40 struct optee_call_queue {
41 /* Serializes access to this struct */
42 struct mutex mutex;
43 struct list_head waiters;
46 struct optee_wait_queue {
47 /* Serializes access to this struct */
48 struct mutex mu;
49 struct list_head db;
52 /**
53 * struct optee_supp - supplicant synchronization struct
54 * @ctx the context of current connected supplicant.
55 * if !NULL the supplicant device is available for use,
56 * else busy
57 * @mutex: held while accessing content of this struct
58 * @req_id: current request id if supplicant is doing synchronous
59 * communication, else -1
60 * @reqs: queued request not yet retrieved by supplicant
61 * @idr: IDR holding all requests currently being processed
62 * by supplicant
63 * @reqs_c: completion used by supplicant when waiting for a
64 * request to be queued.
66 struct optee_supp {
67 /* Serializes access to this struct */
68 struct mutex mutex;
69 struct tee_context *ctx;
71 int req_id;
72 struct list_head reqs;
73 struct idr idr;
74 struct completion reqs_c;
77 /**
78 * struct optee - main service struct
79 * @supp_teedev: supplicant device
80 * @teedev: client device
81 * @invoke_fn: function to issue smc or hvc
82 * @call_queue: queue of threads waiting to call @invoke_fn
83 * @wait_queue: queue of threads from secure world waiting for a
84 * secure world sync object
85 * @supp: supplicant synchronization struct for RPC to supplicant
86 * @pool: shared memory pool
87 * @memremaped_shm virtual address of memory in shared memory pool
88 * @sec_caps: secure world capabilities defined by
89 * OPTEE_SMC_SEC_CAP_* in optee_smc.h
91 struct optee {
92 struct tee_device *supp_teedev;
93 struct tee_device *teedev;
94 optee_invoke_fn *invoke_fn;
95 struct optee_call_queue call_queue;
96 struct optee_wait_queue wait_queue;
97 struct optee_supp supp;
98 struct tee_shm_pool *pool;
99 void *memremaped_shm;
100 u32 sec_caps;
103 struct optee_session {
104 struct list_head list_node;
105 u32 session_id;
108 struct optee_context_data {
109 /* Serializes access to this struct */
110 struct mutex mutex;
111 struct list_head sess_list;
114 struct optee_rpc_param {
115 u32 a0;
116 u32 a1;
117 u32 a2;
118 u32 a3;
119 u32 a4;
120 u32 a5;
121 u32 a6;
122 u32 a7;
125 /* Holds context that is preserved during one STD call */
126 struct optee_call_ctx {
127 /* information about pages list used in last allocation */
128 void *pages_list;
129 size_t num_entries;
132 void optee_handle_rpc(struct tee_context *ctx, struct optee_rpc_param *param,
133 struct optee_call_ctx *call_ctx);
134 void optee_rpc_finalize_call(struct optee_call_ctx *call_ctx);
136 void optee_wait_queue_init(struct optee_wait_queue *wq);
137 void optee_wait_queue_exit(struct optee_wait_queue *wq);
139 u32 optee_supp_thrd_req(struct tee_context *ctx, u32 func, size_t num_params,
140 struct tee_param *param);
142 int optee_supp_read(struct tee_context *ctx, void __user *buf, size_t len);
143 int optee_supp_write(struct tee_context *ctx, void __user *buf, size_t len);
144 void optee_supp_init(struct optee_supp *supp);
145 void optee_supp_uninit(struct optee_supp *supp);
146 void optee_supp_release(struct optee_supp *supp);
148 int optee_supp_recv(struct tee_context *ctx, u32 *func, u32 *num_params,
149 struct tee_param *param);
150 int optee_supp_send(struct tee_context *ctx, u32 ret, u32 num_params,
151 struct tee_param *param);
153 u32 optee_do_call_with_arg(struct tee_context *ctx, phys_addr_t parg);
154 int optee_open_session(struct tee_context *ctx,
155 struct tee_ioctl_open_session_arg *arg,
156 struct tee_param *param);
157 int optee_close_session(struct tee_context *ctx, u32 session);
158 int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg,
159 struct tee_param *param);
160 int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session);
162 void optee_enable_shm_cache(struct optee *optee);
163 void optee_disable_shm_cache(struct optee *optee);
165 int optee_shm_register(struct tee_context *ctx, struct tee_shm *shm,
166 struct page **pages, size_t num_pages,
167 unsigned long start);
168 int optee_shm_unregister(struct tee_context *ctx, struct tee_shm *shm);
170 int optee_shm_register_supp(struct tee_context *ctx, struct tee_shm *shm,
171 struct page **pages, size_t num_pages,
172 unsigned long start);
173 int optee_shm_unregister_supp(struct tee_context *ctx, struct tee_shm *shm);
175 int optee_from_msg_param(struct tee_param *params, size_t num_params,
176 const struct optee_msg_param *msg_params);
177 int optee_to_msg_param(struct optee_msg_param *msg_params, size_t num_params,
178 const struct tee_param *params);
180 u64 *optee_allocate_pages_list(size_t num_entries);
181 void optee_free_pages_list(void *array, size_t num_entries);
182 void optee_fill_pages_list(u64 *dst, struct page **pages, int num_pages,
183 size_t page_offset);
185 int optee_enumerate_devices(void);
188 * Small helpers
191 static inline void *reg_pair_to_ptr(u32 reg0, u32 reg1)
193 return (void *)(unsigned long)(((u64)reg0 << 32) | reg1);
196 static inline void reg_pair_from_64(u32 *reg0, u32 *reg1, u64 val)
198 *reg0 = val >> 32;
199 *reg1 = val;
202 #endif /*OPTEE_PRIVATE_H*/