Quelle  iosm_ipc_imem_ops.h   Sprache: C

/* SPDX-License-Identifier: GPL-2.0-only
 *
 * Copyright (C) 2020-21 Intel Corporation.
 */

#ifndef IOSM_IPC_IMEM_OPS_H
#define IOSM_IPC_IMEM_OPS_H

#include "iosm_ipc_mux_codec.h"

/* Maximum wait time for blocking read */
#define IPC_READ_TIMEOUT 3000

/* The delay in ms for defering the unregister */
#define SIO_UNREGISTER_DEFER_DELAY_MS 1

/* Default delay till CP PSI image is running and modem updates the
 * execution stage.
 * unit : milliseconds
 */
#define PSI_START_DEFAULT_TIMEOUT 3000

/* Default time out when closing SIO, till the modem is in
 * running state.
 * unit : milliseconds
 */
#define BOOT_CHECK_DEFAULT_TIMEOUT 400

/* IP MUX channel range */
#define IP_MUX_SESSION_START 0
#define IP_MUX_SESSION_END 7

/* Default IP MUX channel */
#define IP_MUX_SESSION_DEFAULT 0

/**
 * ipc_imem_sys_port_open - Open a port link to CP.
 * @ipc_imem: Imem instance.
 * @chl_id: Channel Identifier.
 * @hp_id: HP Identifier.
 *
 * Return: channel instance on success, NULL for failure
 */
struct ipc_mem_channel *ipc_imem_sys_port_open(struct iosm_imem *ipc_imem,
            int chl_id, int hp_id);
void ipc_imem_sys_port_close(struct iosm_imem *ipc_imem,
        struct ipc_mem_channel *channel);

/**
 * ipc_imem_sys_cdev_write - Route the uplink buffer to CP.
 * @ipc_cdev: iosm_cdev instance.
 * @skb: Pointer to skb.
 *
 * Return: 0 on success and failure value on error
 */
int ipc_imem_sys_cdev_write(struct iosm_cdev *ipc_cdev, struct sk_buff *skb);

/**
 * ipc_imem_sys_wwan_open - Open packet data online channel between network
 * layer and CP.
 * @ipc_imem: Imem instance.
 * @if_id: ip link tag of the net device.
 *
 * Return: Channel ID on success and failure value on error
 */
int ipc_imem_sys_wwan_open(struct iosm_imem *ipc_imem, int if_id);

/**
 * ipc_imem_sys_wwan_close - Close packet data online channel between network
 *  layer and CP.
 * @ipc_imem: Imem instance.
 * @if_id: IP link id net device.
 * @channel_id: Channel ID to be closed.
 */
void ipc_imem_sys_wwan_close(struct iosm_imem *ipc_imem, int if_id,
        int channel_id);

/**
 * ipc_imem_sys_wwan_transmit - Function for transfer UL data
 * @ipc_imem: Imem instance.
 * @if_id: link ID of the device.
 * @channel_id: Channel ID used
 * @skb: Pointer to sk buffer
 *
 * Return: 0 on success and failure value on error
 */
int ipc_imem_sys_wwan_transmit(struct iosm_imem *ipc_imem, int if_id,
          int channel_id, struct sk_buff *skb);
/**
 * ipc_imem_wwan_channel_init - Initializes WWAN channels and the channel for
 * MUX.
 * @ipc_imem: Pointer to iosm_imem struct.
 * @mux_type: Type of mux protocol.
 *
 * Return: 0 on success and failure value on error
 */
int ipc_imem_wwan_channel_init(struct iosm_imem *ipc_imem,
          enum ipc_mux_protocol mux_type);

/**
 * ipc_imem_sys_devlink_open - Open a Flash/CD Channel link to CP
 * @ipc_imem:   iosm_imem instance
 *
 * Return: channel instance on success, NULL for failure
 */
struct ipc_mem_channel *ipc_imem_sys_devlink_open(struct iosm_imem *ipc_imem);

/**
 * ipc_imem_sys_devlink_close - Release a Flash/CD channel link to CP
 * @ipc_devlink: Pointer to ipc_devlink data-struct
 *
 */
void ipc_imem_sys_devlink_close(struct iosm_devlink *ipc_devlink);

/**
 * ipc_imem_sys_devlink_notify_rx - Receive downlink characters from CP,
 * the downlink skbuf is added at the end of the
 * downlink or rx list
 * @ipc_devlink: Pointer to ipc_devlink data-struct
 * @skb: Pointer to sk buffer
 */
void ipc_imem_sys_devlink_notify_rx(struct iosm_devlink *ipc_devlink,
        struct sk_buff *skb);

/**
 * ipc_imem_sys_devlink_read - Copy the rx data and free the skbuf
 * @ipc_devlink: Devlink instance
 * @data: Buffer to read the data from modem
 * @bytes_to_read: Size of destination buffer
 * @bytes_read: Number of bytes read
 *
 * Return: 0 on success and failure value on error
 */
int ipc_imem_sys_devlink_read(struct iosm_devlink *ipc_devlink, u8 *data,
         u32 bytes_to_read, u32 *bytes_read);

/**
 * ipc_imem_sys_devlink_write - Route the uplink buffer to CP
 * @ipc_devlink: Devlink_sio instance
 * @buf: Pointer to buffer
 * @count: Number of data bytes to write
 * Return: 0 on success and failure value on error
 */
int ipc_imem_sys_devlink_write(struct iosm_devlink *ipc_devlink,
          unsigned char *buf, int count);

#endif