123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/*
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* Copyright (C) 2015 Google, Inc.
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* Copyright (c) 2016-2017, NVIDIA CORPORATION. All rights reserved.
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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 __LINUX_TRUSTY_TRUSTY_IPC_H
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#define __LINUX_TRUSTY_TRUSTY_IPC_H
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/*
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* Errnos below must be in sync with the corresponding errnos
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* defined in 3rdparty/trusty/external/lk/include/err.h
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*/
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#define NO_ERROR (0)
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#define ERR_NOT_FOUND (-2)
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struct tipc_chan;
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struct tipc_msg_buf {
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void *buf_va;
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phys_addr_t buf_pa;
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size_t buf_sz;
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size_t wpos;
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size_t rpos;
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struct list_head node;
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};
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enum tipc_chan_event {
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TIPC_CHANNEL_CONNECTED = 1,
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TIPC_CHANNEL_DISCONNECTED,
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TIPC_CHANNEL_SHUTDOWN,
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TIPC_CHANNEL_NOT_FOUND,
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};
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struct tipc_chan_ops {
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void (*handle_event)(void *cb_arg, int event);
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struct tipc_msg_buf *(*handle_msg)(void *cb_arg,
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struct tipc_msg_buf *mb);
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void (*handle_release)(void *cb_arg);
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};
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struct tipc_chan *tipc_create_channel(struct device *dev,
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const struct tipc_chan_ops *ops,
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void *cb_arg);
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int tipc_chan_connect(struct tipc_chan *chan, const char *port);
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int tipc_chan_queue_msg(struct tipc_chan *chan, struct tipc_msg_buf *mb);
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int tipc_chan_shutdown(struct tipc_chan *chan);
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void tipc_chan_destroy(struct tipc_chan *chan);
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struct tipc_msg_buf *tipc_chan_get_rxbuf(struct tipc_chan *chan);
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void tipc_chan_put_rxbuf(struct tipc_chan *chan, struct tipc_msg_buf *mb);
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struct tipc_msg_buf *
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tipc_chan_get_txbuf_timeout(struct tipc_chan *chan, long timeout);
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void tipc_chan_put_txbuf(struct tipc_chan *chan, struct tipc_msg_buf *mb);
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static inline size_t mb_avail_space(struct tipc_msg_buf *mb)
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{
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return mb->buf_sz - mb->wpos;
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}
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static inline size_t mb_avail_data(struct tipc_msg_buf *mb)
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{
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return mb->wpos - mb->rpos;
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}
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static inline void *mb_put_data(struct tipc_msg_buf *mb, size_t len)
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{
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void *pos = (u8 *)mb->buf_va + mb->wpos;
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BUG_ON(mb->wpos + len > mb->buf_sz);
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mb->wpos += len;
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return pos;
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}
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static inline void *mb_get_data(struct tipc_msg_buf *mb, size_t len)
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{
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void *pos = (u8 *)mb->buf_va + mb->rpos;
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BUG_ON(mb->rpos + len > mb->wpos);
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mb->rpos += len;
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return pos;
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}
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/* OTE-TIPC wrapper APIs*/
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/*
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* te_open_trusted_session - Establishes the session with TA
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* @name(in): name of the TA to connect to.
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* @ctx(out): pointer to the private data associated to the open session
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* Returns 0 on Success else error code.
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*/
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int te_open_trusted_session(char *name, void **ctx);
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/*
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* te_close_trusted_session - Closes the session established
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* @ctx: ctx returned by open session
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*/
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void te_close_trusted_session(void *ctx);
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/*
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* te_launch_trusted_oper - Communicate with TA to perform any operation
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* @buf: Buffer to sent to secure world.
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* @buf_len: length of the buffer.
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* @ta_cmd: command to sent to secure world.
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* @ctx: ctx returned by open session.
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* Returns 0 on Success else error code.
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*/
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int te_launch_trusted_oper(void *buf, size_t buf_len, uint32_t ta_cmd,
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void *ctx);
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#endif /* __LINUX_TRUSTY_TRUSTY_IPC_H */
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