/* SPDX-License-Identifier: GPL-2.0-only
*
* Copyright (c) 2021, MediaTek Inc.
* Copyright (c) 2021-2022, Intel Corporation.
*
* Authors:
* Haijun Liu <[email protected]>
* Moises Veleta <[email protected]>
* Ricardo Martinez <[email protected]>
*
* Contributors:
* Amir Hanania <[email protected]>
* Andy Shevchenko <[email protected]>
* Chandrashekar Devegowda <[email protected]>
* Eliot Lee <[email protected]>
*/
#ifndef __T7XX_PORT_H__
#define __T7XX_PORT_H__
#include <linux/bits.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/sched.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/wait.h>
#include <linux/wwan.h>
#include "t7xx_hif_cldma.h"
#include "t7xx_pci.h"
#define PORT_CH_ID_MASK GENMASK(7, 0)
/* Channel ID and Message ID definitions.
* The channel number consists of peer_id(15:12) , channel_id(11:0)
* peer_id:
* 0:reserved, 1: to AP, 2: to MD
*/
enum port_ch {
/* to AP */
PORT_CH_AP_CONTROL_RX = 0x1000,
PORT_CH_AP_CONTROL_TX = 0x1001,
/* to MD */
PORT_CH_CONTROL_RX = 0x2000,
PORT_CH_CONTROL_TX = 0x2001,
PORT_CH_UART1_RX = 0x2006, /* META */
PORT_CH_UART1_TX = 0x2008,
PORT_CH_UART2_RX = 0x200a, /* AT */
PORT_CH_UART2_TX = 0x200c,
PORT_CH_MD_LOG_RX = 0x202a, /* MD logging */
PORT_CH_MD_LOG_TX = 0x202b,
PORT_CH_LB_IT_RX = 0x203e, /* Loop back test */
PORT_CH_LB_IT_TX = 0x203f,
PORT_CH_STATUS_RX = 0x2043, /* Status events */
PORT_CH_MIPC_RX = 0x20ce, /* MIPC */
PORT_CH_MIPC_TX = 0x20cf,
PORT_CH_MBIM_RX = 0x20d0,
PORT_CH_MBIM_TX = 0x20d1,
PORT_CH_DSS0_RX = 0x20d2,
PORT_CH_DSS0_TX = 0x20d3,
PORT_CH_DSS1_RX = 0x20d4,
PORT_CH_DSS1_TX = 0x20d5,
PORT_CH_DSS2_RX = 0x20d6,
PORT_CH_DSS2_TX = 0x20d7,
PORT_CH_DSS3_RX = 0x20d8,
PORT_CH_DSS3_TX = 0x20d9,
PORT_CH_DSS4_RX = 0x20da,
PORT_CH_DSS4_TX = 0x20db,
PORT_CH_DSS5_RX = 0x20dc,
PORT_CH_DSS5_TX = 0x20dd,
PORT_CH_DSS6_RX = 0x20de,
PORT_CH_DSS6_TX = 0x20df,
PORT_CH_DSS7_RX = 0x20e0,
PORT_CH_DSS7_TX = 0x20e1,
PORT_CH_UNIMPORTANT = 0xffff,
};
struct t7xx_port;
struct port_ops {
int (*init)(struct t7xx_port *port);
int (*recv_skb)(struct t7xx_port *port, struct sk_buff *skb);
void (*md_state_notify)(struct t7xx_port *port, unsigned int md_state);
void (*uninit)(struct t7xx_port *port);
int (*enable_chl)(struct t7xx_port *port);
int (*disable_chl)(struct t7xx_port *port);
};
struct t7xx_port_conf {
enum port_ch tx_ch;
enum port_ch rx_ch;
unsigned char txq_index;
unsigned char rxq_index;
unsigned char txq_exp_index;
unsigned char rxq_exp_index;
enum cldma_id path_id;
struct port_ops *ops;
char *name;
enum wwan_port_type port_type;
};
struct t7xx_port {
/* Members not initialized in definition */
const struct t7xx_port_conf *port_conf;
struct t7xx_pci_dev *t7xx_dev;
struct device *dev;
u16 seq_nums[2]; /* TX/RX sequence numbers */
atomic_t usage_cnt;
struct list_head entry;
struct list_head queue_entry;
/* TX and RX flows are asymmetric since ports are multiplexed on
* queues.
*
* TX: data blocks are sent directly to a queue. Each port
* does not maintain a TX list; instead, they only provide
* a wait_queue_head for blocking writes.
*
* RX: Each port uses a RX list to hold packets,
* allowing the modem to dispatch RX packet as quickly as possible.
*/
struct sk_buff_head rx_skb_list;
spinlock_t port_update_lock; /* Protects port configuration */
wait_queue_head_t rx_wq;
int rx_length_th;
bool chan_enable;
struct task_struct *thread;
union {
struct {
struct wwan_port *wwan_port;
} wwan;
struct {
struct rchan *relaych;
} log;
};
};
int t7xx_get_port_mtu(struct t7xx_port *port);
struct sk_buff *t7xx_port_alloc_skb(int payload);
struct sk_buff *t7xx_ctrl_alloc_skb(int payload);
int t7xx_port_enqueue_skb(struct t7xx_port *port, struct sk_buff *skb);
int t7xx_port_send_skb(struct t7xx_port *port, struct sk_buff *skb, unsigned int pkt_header,
unsigned int ex_msg);
int t7xx_port_send_raw_skb(struct t7xx_port *port, struct sk_buff *skb);
int t7xx_port_send_ctl_skb(struct t7xx_port *port, struct sk_buff *skb, unsigned int msg,
unsigned int ex_msg);
#endif /* __T7XX_PORT_H__ */
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