linux/drivers/net/wwan/t7xx/t7xx_port_proxy.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2021, MediaTek Inc.
 * Copyright (c) 2021-2022, Intel Corporation.
 *
 * Authors:
 *  Amir Hanania <[email protected]>
 *  Haijun Liu <[email protected]>
 *  Moises Veleta <[email protected]>
 *  Ricardo Martinez <[email protected]>
 *
 * Contributors:
 *  Andy Shevchenko <[email protected]>
 *  Chandrashekar Devegowda <[email protected]>
 *  Chiranjeevi Rapolu <[email protected]>
 *  Eliot Lee <[email protected]>
 *  Sreehari Kancharla <[email protected]>
 */

#include <linux/bits.h>
#include <linux/bitfield.h>
#include <linux/device.h>
#include <linux/gfp.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
#include <linux/wwan.h>

#include "t7xx_hif_cldma.h"
#include "t7xx_modem_ops.h"
#include "t7xx_port.h"
#include "t7xx_port_proxy.h"
#include "t7xx_state_monitor.h"

#define Q_IDX_CTRL …
#define Q_IDX_MBIM …
#define Q_IDX_AT_CMD …

#define INVALID_SEQ_NUM …

#define for_each_proxy_port(i, p, proxy) …

#define T7XX_MAX_POSSIBLE_PORTS_NUM …

static const struct t7xx_port_conf t7xx_port_conf[] = …;

static const struct t7xx_port_conf t7xx_early_port_conf[] = …;

static struct t7xx_port *t7xx_proxy_get_port_by_ch(struct port_proxy *port_prox, enum port_ch ch)
{ … }

static u16 t7xx_port_next_rx_seq_num(struct t7xx_port *port, struct ccci_header *ccci_h)
{ … }

void t7xx_port_proxy_reset(struct port_proxy *port_prox)
{ … }

static int t7xx_port_get_queue_no(struct t7xx_port *port)
{ … }

static void t7xx_port_struct_init(struct t7xx_port *port)
{ … }

struct sk_buff *t7xx_port_alloc_skb(int payload)
{ … }

struct sk_buff *t7xx_ctrl_alloc_skb(int payload)
{ … }

/**
 * t7xx_port_enqueue_skb() - Enqueue the received skb into the port's rx_skb_list.
 * @port: port context.
 * @skb: received skb.
 *
 * Return:
 * * 0		- Success.
 * * -ENOBUFS	- Not enough buffer space. Caller will try again later, skb is not consumed.
 */
int t7xx_port_enqueue_skb(struct t7xx_port *port, struct sk_buff *skb)
{ … }

int t7xx_get_port_mtu(struct t7xx_port *port)
{ … }

int t7xx_port_send_raw_skb(struct t7xx_port *port, struct sk_buff *skb)
{ … }

static int t7xx_port_send_ccci_skb(struct t7xx_port *port, struct sk_buff *skb,
				   unsigned int pkt_header, unsigned int ex_msg)
{ … }

int t7xx_port_send_ctl_skb(struct t7xx_port *port, struct sk_buff *skb, unsigned int msg,
			   unsigned int ex_msg)
{ … }

int t7xx_port_send_skb(struct t7xx_port *port, struct sk_buff *skb, unsigned int pkt_header,
		       unsigned int ex_msg)
{ … }

static void t7xx_proxy_setup_ch_mapping(struct port_proxy *port_prox)
{ … }

/**
 * t7xx_port_proxy_recv_skb_from_dedicated_queue() - Dispatch early port received skb.
 * @queue: CLDMA queue.
 * @skb: Socket buffer.
 *
 * Return:
 ** 0		- Packet consumed.
 ** -ERROR	- Failed to process skb.
 */
int t7xx_port_proxy_recv_skb_from_dedicated_queue(struct cldma_queue *queue, struct sk_buff *skb)
{ … }

static struct t7xx_port *t7xx_port_proxy_find_port(struct t7xx_pci_dev *t7xx_dev,
						   struct cldma_queue *queue, u16 channel)
{ … }

/**
 * t7xx_port_proxy_recv_skb() - Dispatch received skb.
 * @queue: CLDMA queue.
 * @skb: Socket buffer.
 *
 * Return:
 ** 0		- Packet consumed.
 ** -ERROR	- Failed to process skb.
 */
int t7xx_port_proxy_recv_skb(struct cldma_queue *queue, struct sk_buff *skb)
{ … }

/**
 * t7xx_port_proxy_md_status_notify() - Notify all ports of state.
 *@port_prox: The port_proxy pointer.
 *@state: State.
 *
 * Called by t7xx_fsm. Used to dispatch modem status for all ports,
 * which want to know MD state transition.
 */
void t7xx_port_proxy_md_status_notify(struct port_proxy *port_prox, unsigned int state)
{ … }

static void t7xx_proxy_init_all_ports(struct t7xx_modem *md)
{ … }

void t7xx_port_proxy_set_cfg(struct t7xx_modem *md, enum port_cfg_id cfg_id)
{ … }

static int t7xx_proxy_alloc(struct t7xx_modem *md)
{ … }

/**
 * t7xx_port_proxy_init() - Initialize ports.
 * @md: Modem.
 *
 * Create all port instances.
 *
 * Return:
 * * 0		- Success.
 * * -ERROR	- Error code from failure sub-initializations.
 */
int t7xx_port_proxy_init(struct t7xx_modem *md)
{ … }

void t7xx_port_proxy_uninit(struct port_proxy *port_prox)
{ … }

int t7xx_port_proxy_chl_enable_disable(struct port_proxy *port_prox, unsigned int ch_id,
				       bool en_flag)
{ … }