linux/drivers/net/wwan/iosm/iosm_ipc_imem_ops.c

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

#include <linux/delay.h>

#include "iosm_ipc_chnl_cfg.h"
#include "iosm_ipc_devlink.h"
#include "iosm_ipc_imem.h"
#include "iosm_ipc_imem_ops.h"
#include "iosm_ipc_port.h"
#include "iosm_ipc_task_queue.h"

/* Open a packet data online channel between the network layer and CP. */
int ipc_imem_sys_wwan_open(struct iosm_imem *ipc_imem, int if_id)
{ … }

/* Release a net link to CP. */
void ipc_imem_sys_wwan_close(struct iosm_imem *ipc_imem, int if_id,
			     int channel_id)
{ … }

/* Tasklet call to do uplink transfer. */
static int ipc_imem_tq_cdev_write(struct iosm_imem *ipc_imem, int arg,
				  void *msg, size_t size)
{ … }

/* Through tasklet to do sio write. */
static int ipc_imem_call_cdev_write(struct iosm_imem *ipc_imem)
{ … }

/* Function for transfer UL data */
int ipc_imem_sys_wwan_transmit(struct iosm_imem *ipc_imem,
			       int if_id, int channel_id, struct sk_buff *skb)
{ … }

/* Initialize wwan channel */
int ipc_imem_wwan_channel_init(struct iosm_imem *ipc_imem,
			       enum ipc_mux_protocol mux_type)
{ … }

/* Map SKB to DMA for transfer */
static int ipc_imem_map_skb_to_dma(struct iosm_imem *ipc_imem,
				   struct sk_buff *skb)
{ … }

/* return true if channel is ready for use */
static bool ipc_imem_is_channel_active(struct iosm_imem *ipc_imem,
				       struct ipc_mem_channel *channel)
{ … }

/**
 * ipc_imem_sys_port_close - Release a sio link to CP.
 * @ipc_imem:          Imem instance.
 * @channel:           Channel instance.
 */
void ipc_imem_sys_port_close(struct iosm_imem *ipc_imem,
			     struct ipc_mem_channel *channel)
{ … }

/* Open a PORT link to CP and return the channel */
struct ipc_mem_channel *ipc_imem_sys_port_open(struct iosm_imem *ipc_imem,
					       int chl_id, int hp_id)
{ … }

/* transfer skb to modem */
int ipc_imem_sys_cdev_write(struct iosm_cdev *ipc_cdev, struct sk_buff *skb)
{ … }

/* Open a SIO link to CP and return the channel instance */
struct ipc_mem_channel *ipc_imem_sys_devlink_open(struct iosm_imem *ipc_imem)
{ … }

/* Release a SIO channel link to CP. */
void ipc_imem_sys_devlink_close(struct iosm_devlink *ipc_devlink)
{ … }

void ipc_imem_sys_devlink_notify_rx(struct iosm_devlink *ipc_devlink,
				    struct sk_buff *skb)
{ … }

/* PSI transfer */
static int ipc_imem_sys_psi_transfer(struct iosm_imem *ipc_imem,
				     struct ipc_mem_channel *channel,
				     unsigned char *buf, int count)
{ … }

int ipc_imem_sys_devlink_write(struct iosm_devlink *ipc_devlink,
			       unsigned char *buf, int count)
{ … }

int ipc_imem_sys_devlink_read(struct iosm_devlink *devlink, u8 *data,
			      u32 bytes_to_read, u32 *bytes_read)
{ … }