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

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

#include "iosm_ipc_protocol.h"
#include "iosm_ipc_protocol_ops.h"

/* Get the next free message element.*/
static union ipc_mem_msg_entry *
ipc_protocol_free_msg_get(struct iosm_protocol *ipc_protocol, int *index)
{ … }

/* Updates the message ring Head pointer */
void ipc_protocol_msg_hp_update(struct iosm_imem *ipc_imem)
{ … }

/* Allocate and prepare a OPEN_PIPE message.
 * This also allocates the memory for the new TDR structure and
 * updates the pipe structure referenced in the preparation arguments.
 */
static int ipc_protocol_msg_prepipe_open(struct iosm_protocol *ipc_protocol,
					 union ipc_msg_prep_args *args)
{ … }

static int ipc_protocol_msg_prepipe_close(struct iosm_protocol *ipc_protocol,
					  union ipc_msg_prep_args *args)
{ … }

static int ipc_protocol_msg_prep_sleep(struct iosm_protocol *ipc_protocol,
				       union ipc_msg_prep_args *args)
{ … }

static int ipc_protocol_msg_prep_feature_set(struct iosm_protocol *ipc_protocol,
					     union ipc_msg_prep_args *args)
{ … }

/* Processes the message consumed by CP. */
bool ipc_protocol_msg_process(struct iosm_imem *ipc_imem, int irq)
{ … }

/* Sends data from UL list to CP for the provided pipe by updating the Head
 * pointer of given pipe.
 */
bool ipc_protocol_ul_td_send(struct iosm_protocol *ipc_protocol,
			     struct ipc_pipe *pipe,
			     struct sk_buff_head *p_ul_list)
{ … }

/* Checks for Tail pointer update from CP and returns the data as SKB. */
struct sk_buff *ipc_protocol_ul_td_process(struct iosm_protocol *ipc_protocol,
					   struct ipc_pipe *pipe)
{ … }

/* Allocates an SKB for CP to send data and updates the Head Pointer
 * of the given Pipe#.
 */
bool ipc_protocol_dl_td_prepare(struct iosm_protocol *ipc_protocol,
				struct ipc_pipe *pipe)
{ … }

/* Processes DL TD's */
struct sk_buff *ipc_protocol_dl_td_process(struct iosm_protocol *ipc_protocol,
					   struct ipc_pipe *pipe)
{ … }

void ipc_protocol_get_head_tail_index(struct iosm_protocol *ipc_protocol,
				      struct ipc_pipe *pipe, u32 *head,
				      u32 *tail)
{ … }

/* Frees the TDs given to CP.  */
void ipc_protocol_pipe_cleanup(struct iosm_protocol *ipc_protocol,
			       struct ipc_pipe *pipe)
{ … }

enum ipc_mem_device_ipc_state ipc_protocol_get_ipc_status(struct iosm_protocol
							  *ipc_protocol)
{ … }

enum ipc_mem_exec_stage
ipc_protocol_get_ap_exec_stage(struct iosm_protocol *ipc_protocol)
{ … }

int ipc_protocol_msg_prep(struct iosm_imem *ipc_imem,
			  enum ipc_msg_prep_type msg_type,
			  union ipc_msg_prep_args *args)
{ … }

u32
ipc_protocol_pm_dev_get_sleep_notification(struct iosm_protocol *ipc_protocol)
{ … }