200 lines
6 KiB
C
200 lines
6 KiB
C
/*
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* Copyright (c) 2015, Linaro Limited
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef OPTEE_PRIVATE_H
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#define OPTEE_PRIVATE_H
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#include <linux/arm-smccc.h>
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#include <linux/semaphore.h>
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#include <linux/tee_drv.h>
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#include <linux/types.h>
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#include "optee_msg.h"
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#define OPTEE_MAX_ARG_SIZE 1024
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/* Some Global Platform error codes used in this driver */
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#define TEEC_SUCCESS 0x00000000
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#define TEEC_ERROR_BAD_PARAMETERS 0xFFFF0006
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#define TEEC_ERROR_COMMUNICATION 0xFFFF000E
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#define TEEC_ERROR_OUT_OF_MEMORY 0xFFFF000C
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#define TEEC_ORIGIN_COMMS 0x00000002
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typedef void (optee_invoke_fn)(unsigned long, unsigned long, unsigned long,
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unsigned long, unsigned long, unsigned long,
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unsigned long, unsigned long,
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struct arm_smccc_res *);
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struct optee_call_queue {
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/* Serializes access to this struct */
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struct mutex mutex;
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struct list_head waiters;
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};
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struct optee_wait_queue {
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/* Serializes access to this struct */
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struct mutex mu;
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struct list_head db;
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};
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/**
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* struct optee_supp - supplicant synchronization struct
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* @ctx the context of current connected supplicant.
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* if !NULL the supplicant device is available for use,
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* else busy
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* @mutex: held while accessing content of this struct
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* @req_id: current request id if supplicant is doing synchronous
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* communication, else -1
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* @reqs: queued request not yet retrieved by supplicant
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* @idr: IDR holding all requests currently being processed
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* by supplicant
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* @reqs_c: completion used by supplicant when waiting for a
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* request to be queued.
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*/
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struct optee_supp {
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/* Serializes access to this struct */
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struct mutex mutex;
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struct tee_context *ctx;
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int req_id;
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struct list_head reqs;
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struct idr idr;
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struct completion reqs_c;
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};
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/**
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* struct optee - main service struct
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* @supp_teedev: supplicant device
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* @teedev: client device
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* @invoke_fn: function to issue smc or hvc
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* @call_queue: queue of threads waiting to call @invoke_fn
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* @wait_queue: queue of threads from secure world waiting for a
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* secure world sync object
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* @supp: supplicant synchronization struct for RPC to supplicant
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* @pool: shared memory pool
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* @memremaped_shm virtual address of memory in shared memory pool
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* @sec_caps: secure world capabilities defined by
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* OPTEE_SMC_SEC_CAP_* in optee_smc.h
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*/
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struct optee {
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struct tee_device *supp_teedev;
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struct tee_device *teedev;
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optee_invoke_fn *invoke_fn;
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struct optee_call_queue call_queue;
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struct optee_wait_queue wait_queue;
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struct optee_supp supp;
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struct tee_shm_pool *pool;
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void *memremaped_shm;
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u32 sec_caps;
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};
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struct optee_session {
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struct list_head list_node;
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u32 session_id;
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};
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struct optee_context_data {
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/* Serializes access to this struct */
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struct mutex mutex;
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struct list_head sess_list;
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};
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struct optee_rpc_param {
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u32 a0;
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u32 a1;
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u32 a2;
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u32 a3;
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u32 a4;
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u32 a5;
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u32 a6;
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u32 a7;
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};
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/* Holds context that is preserved during one STD call */
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struct optee_call_ctx {
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/* information about pages list used in last allocation */
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void *pages_list;
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size_t num_entries;
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};
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void optee_handle_rpc(struct tee_context *ctx, struct optee_rpc_param *param,
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struct optee_call_ctx *call_ctx);
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void optee_rpc_finalize_call(struct optee_call_ctx *call_ctx);
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void optee_wait_queue_init(struct optee_wait_queue *wq);
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void optee_wait_queue_exit(struct optee_wait_queue *wq);
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u32 optee_supp_thrd_req(struct tee_context *ctx, u32 func, size_t num_params,
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struct tee_param *param);
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int optee_supp_read(struct tee_context *ctx, void __user *buf, size_t len);
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int optee_supp_write(struct tee_context *ctx, void __user *buf, size_t len);
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void optee_supp_init(struct optee_supp *supp);
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void optee_supp_uninit(struct optee_supp *supp);
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void optee_supp_release(struct optee_supp *supp);
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int optee_supp_recv(struct tee_context *ctx, u32 *func, u32 *num_params,
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struct tee_param *param);
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int optee_supp_send(struct tee_context *ctx, u32 ret, u32 num_params,
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struct tee_param *param);
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u32 optee_do_call_with_arg(struct tee_context *ctx, phys_addr_t parg);
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int optee_open_session(struct tee_context *ctx,
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struct tee_ioctl_open_session_arg *arg,
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struct tee_param *param);
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int optee_close_session(struct tee_context *ctx, u32 session);
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int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg,
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struct tee_param *param);
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int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session);
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void optee_enable_shm_cache(struct optee *optee);
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void optee_disable_shm_cache(struct optee *optee);
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int optee_shm_register(struct tee_context *ctx, struct tee_shm *shm,
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struct page **pages, size_t num_pages,
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unsigned long start);
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int optee_shm_unregister(struct tee_context *ctx, struct tee_shm *shm);
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int optee_shm_register_supp(struct tee_context *ctx, struct tee_shm *shm,
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struct page **pages, size_t num_pages,
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unsigned long start);
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int optee_shm_unregister_supp(struct tee_context *ctx, struct tee_shm *shm);
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int optee_from_msg_param(struct tee_param *params, size_t num_params,
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const struct optee_msg_param *msg_params);
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int optee_to_msg_param(struct optee_msg_param *msg_params, size_t num_params,
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const struct tee_param *params);
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u64 *optee_allocate_pages_list(size_t num_entries);
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void optee_free_pages_list(void *array, size_t num_entries);
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void optee_fill_pages_list(u64 *dst, struct page **pages, int num_pages,
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size_t page_offset);
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/*
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* Small helpers
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*/
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static inline void *reg_pair_to_ptr(u32 reg0, u32 reg1)
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{
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return (void *)(unsigned long)(((u64)reg0 << 32) | reg1);
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}
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static inline void reg_pair_from_64(u32 *reg0, u32 *reg1, u64 val)
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{
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*reg0 = val >> 32;
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*reg1 = val;
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}
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#endif /*OPTEE_PRIVATE_H*/
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