183 lines
5.4 KiB
C
183 lines
5.4 KiB
C
/*
|
|
* ISHTP client logic
|
|
*
|
|
* Copyright (c) 2003-2016, Intel Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
|
|
#ifndef _ISHTP_CLIENT_H_
|
|
#define _ISHTP_CLIENT_H_
|
|
|
|
#include <linux/types.h>
|
|
#include "ishtp-dev.h"
|
|
|
|
/* Client state */
|
|
enum cl_state {
|
|
ISHTP_CL_INITIALIZING = 0,
|
|
ISHTP_CL_CONNECTING,
|
|
ISHTP_CL_CONNECTED,
|
|
ISHTP_CL_DISCONNECTING,
|
|
ISHTP_CL_DISCONNECTED
|
|
};
|
|
|
|
/* Tx and Rx ring size */
|
|
#define CL_DEF_RX_RING_SIZE 2
|
|
#define CL_DEF_TX_RING_SIZE 2
|
|
#define CL_MAX_RX_RING_SIZE 32
|
|
#define CL_MAX_TX_RING_SIZE 32
|
|
|
|
#define DMA_SLOT_SIZE 4096
|
|
/* Number of IPC fragments after which it's worth sending via DMA */
|
|
#define DMA_WORTH_THRESHOLD 3
|
|
|
|
/* DMA/IPC Tx paths. Other the default means enforcement */
|
|
#define CL_TX_PATH_DEFAULT 0
|
|
#define CL_TX_PATH_IPC 1
|
|
#define CL_TX_PATH_DMA 2
|
|
|
|
/* Client Tx buffer list entry */
|
|
struct ishtp_cl_tx_ring {
|
|
struct list_head list;
|
|
struct ishtp_msg_data send_buf;
|
|
};
|
|
|
|
/* ISHTP client instance */
|
|
struct ishtp_cl {
|
|
struct list_head link;
|
|
struct ishtp_device *dev;
|
|
enum cl_state state;
|
|
int status;
|
|
|
|
/* Link to ISHTP bus device */
|
|
struct ishtp_cl_device *device;
|
|
|
|
/* ID of client connected */
|
|
uint8_t host_client_id;
|
|
uint8_t fw_client_id;
|
|
uint8_t ishtp_flow_ctrl_creds;
|
|
uint8_t out_flow_ctrl_creds;
|
|
|
|
/* dma */
|
|
int last_tx_path;
|
|
/* 0: ack wasn't received,1:ack was received */
|
|
int last_dma_acked;
|
|
unsigned char *last_dma_addr;
|
|
/* 0: ack wasn't received,1:ack was received */
|
|
int last_ipc_acked;
|
|
|
|
/* Rx ring buffer pool */
|
|
unsigned int rx_ring_size;
|
|
struct ishtp_cl_rb free_rb_list;
|
|
spinlock_t free_list_spinlock;
|
|
/* Rx in-process list */
|
|
struct ishtp_cl_rb in_process_list;
|
|
spinlock_t in_process_spinlock;
|
|
|
|
/* Client Tx buffers list */
|
|
unsigned int tx_ring_size;
|
|
struct ishtp_cl_tx_ring tx_list, tx_free_list;
|
|
spinlock_t tx_list_spinlock;
|
|
spinlock_t tx_free_list_spinlock;
|
|
size_t tx_offs; /* Offset in buffer at head of 'tx_list' */
|
|
|
|
/**
|
|
* if we get a FC, and the list is not empty, we must know whether we
|
|
* are at the middle of sending.
|
|
* if so -need to increase FC counter, otherwise, need to start sending
|
|
* the first msg in list
|
|
* (!)This is for counting-FC implementation only. Within single-FC the
|
|
* other party may NOT send FC until it receives complete message
|
|
*/
|
|
int sending;
|
|
|
|
/* Send FC spinlock */
|
|
spinlock_t fc_spinlock;
|
|
|
|
/* wait queue for connect and disconnect response from FW */
|
|
wait_queue_head_t wait_ctrl_res;
|
|
|
|
/* Error stats */
|
|
unsigned int err_send_msg;
|
|
unsigned int err_send_fc;
|
|
|
|
/* Send/recv stats */
|
|
unsigned int send_msg_cnt_ipc;
|
|
unsigned int send_msg_cnt_dma;
|
|
unsigned int recv_msg_cnt_ipc;
|
|
unsigned int recv_msg_cnt_dma;
|
|
unsigned int recv_msg_num_frags;
|
|
unsigned int ishtp_flow_ctrl_cnt;
|
|
unsigned int out_flow_ctrl_cnt;
|
|
|
|
/* Rx msg ... out FC timing */
|
|
ktime_t ts_rx;
|
|
ktime_t ts_out_fc;
|
|
ktime_t ts_max_fc_delay;
|
|
void *client_data;
|
|
};
|
|
|
|
/* Client connection managenment internal functions */
|
|
int ishtp_can_client_connect(struct ishtp_device *ishtp_dev, uuid_le *uuid);
|
|
int ishtp_fw_cl_by_id(struct ishtp_device *dev, uint8_t client_id);
|
|
void ishtp_cl_send_msg(struct ishtp_device *dev, struct ishtp_cl *cl);
|
|
void recv_ishtp_cl_msg(struct ishtp_device *dev,
|
|
struct ishtp_msg_hdr *ishtp_hdr);
|
|
int ishtp_cl_read_start(struct ishtp_cl *cl);
|
|
|
|
/* Ring Buffer I/F */
|
|
int ishtp_cl_alloc_rx_ring(struct ishtp_cl *cl);
|
|
int ishtp_cl_alloc_tx_ring(struct ishtp_cl *cl);
|
|
void ishtp_cl_free_rx_ring(struct ishtp_cl *cl);
|
|
void ishtp_cl_free_tx_ring(struct ishtp_cl *cl);
|
|
|
|
/* DMA I/F functions */
|
|
void recv_ishtp_cl_msg_dma(struct ishtp_device *dev, void *msg,
|
|
struct dma_xfer_hbm *hbm);
|
|
void ishtp_cl_alloc_dma_buf(struct ishtp_device *dev);
|
|
void ishtp_cl_free_dma_buf(struct ishtp_device *dev);
|
|
void *ishtp_cl_get_dma_send_buf(struct ishtp_device *dev,
|
|
uint32_t size);
|
|
void ishtp_cl_release_dma_acked_mem(struct ishtp_device *dev,
|
|
void *msg_addr,
|
|
uint8_t size);
|
|
|
|
/* Request blocks alloc/free I/F */
|
|
struct ishtp_cl_rb *ishtp_io_rb_init(struct ishtp_cl *cl);
|
|
void ishtp_io_rb_free(struct ishtp_cl_rb *priv_rb);
|
|
int ishtp_io_rb_alloc_buf(struct ishtp_cl_rb *rb, size_t length);
|
|
|
|
/**
|
|
* ishtp_cl_cmp_id - tells if file private data have same id
|
|
* returns true - if ids are the same and not NULL
|
|
*/
|
|
static inline bool ishtp_cl_cmp_id(const struct ishtp_cl *cl1,
|
|
const struct ishtp_cl *cl2)
|
|
{
|
|
return cl1 && cl2 &&
|
|
(cl1->host_client_id == cl2->host_client_id) &&
|
|
(cl1->fw_client_id == cl2->fw_client_id);
|
|
}
|
|
|
|
/* exported functions from ISHTP under client management scope */
|
|
struct ishtp_cl *ishtp_cl_allocate(struct ishtp_device *dev);
|
|
void ishtp_cl_free(struct ishtp_cl *cl);
|
|
int ishtp_cl_link(struct ishtp_cl *cl, int id);
|
|
void ishtp_cl_unlink(struct ishtp_cl *cl);
|
|
int ishtp_cl_disconnect(struct ishtp_cl *cl);
|
|
int ishtp_cl_connect(struct ishtp_cl *cl);
|
|
int ishtp_cl_send(struct ishtp_cl *cl, uint8_t *buf, size_t length);
|
|
int ishtp_cl_flush_queues(struct ishtp_cl *cl);
|
|
|
|
/* exported functions from ISHTP client buffer management scope */
|
|
int ishtp_cl_io_rb_recycle(struct ishtp_cl_rb *rb);
|
|
|
|
#endif /* _ISHTP_CLIENT_H_ */
|