da45d2566a
Control Port implements driver control messages such as modem-host handshaking, controls port enumeration, and handles exception messages. The handshaking process between the driver and the modem happens during the init sequence. The process involves the exchange of a list of supported runtime features to make sure that modem and host are ready to provide proper feature lists including port enumeration. Further features can be enabled and controlled in this handshaking process. Signed-off-by: Haijun Liu <haijun.liu@mediatek.com> Signed-off-by: Chandrashekar Devegowda <chandrashekar.devegowda@intel.com> Co-developed-by: Ricardo Martinez <ricardo.martinez@linux.intel.com> Signed-off-by: Ricardo Martinez <ricardo.martinez@linux.intel.com> Reviewed-by: Loic Poulain <loic.poulain@linaro.org> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Reviewed-by: Sergey Ryazanov <ryazanov.s.a@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
135 lines
3.9 KiB
C
135 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only
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*
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* Copyright (c) 2021, MediaTek Inc.
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* Copyright (c) 2021-2022, Intel Corporation.
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*
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* Authors:
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* Haijun Liu <haijun.liu@mediatek.com>
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* Moises Veleta <moises.veleta@intel.com>
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* Ricardo Martinez <ricardo.martinez@linux.intel.com>
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*
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* Contributors:
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* Amir Hanania <amir.hanania@intel.com>
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* Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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* Chandrashekar Devegowda <chandrashekar.devegowda@intel.com>
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* Eliot Lee <eliot.lee@intel.com>
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*/
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#ifndef __T7XX_PORT_H__
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#define __T7XX_PORT_H__
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#include <linux/bits.h>
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#include <linux/device.h>
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#include <linux/mutex.h>
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#include <linux/sched.h>
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#include <linux/skbuff.h>
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include <linux/wait.h>
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#include <linux/wwan.h>
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#include "t7xx_hif_cldma.h"
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#include "t7xx_pci.h"
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#define PORT_CH_ID_MASK GENMASK(7, 0)
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/* Channel ID and Message ID definitions.
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* The channel number consists of peer_id(15:12) , channel_id(11:0)
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* peer_id:
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* 0:reserved, 1: to sAP, 2: to MD
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*/
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enum port_ch {
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/* to MD */
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PORT_CH_CONTROL_RX = 0x2000,
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PORT_CH_CONTROL_TX = 0x2001,
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PORT_CH_UART1_RX = 0x2006, /* META */
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PORT_CH_UART1_TX = 0x2008,
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PORT_CH_UART2_RX = 0x200a, /* AT */
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PORT_CH_UART2_TX = 0x200c,
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PORT_CH_MD_LOG_RX = 0x202a, /* MD logging */
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PORT_CH_MD_LOG_TX = 0x202b,
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PORT_CH_LB_IT_RX = 0x203e, /* Loop back test */
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PORT_CH_LB_IT_TX = 0x203f,
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PORT_CH_STATUS_RX = 0x2043, /* Status events */
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PORT_CH_MIPC_RX = 0x20ce, /* MIPC */
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PORT_CH_MIPC_TX = 0x20cf,
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PORT_CH_MBIM_RX = 0x20d0,
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PORT_CH_MBIM_TX = 0x20d1,
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PORT_CH_DSS0_RX = 0x20d2,
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PORT_CH_DSS0_TX = 0x20d3,
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PORT_CH_DSS1_RX = 0x20d4,
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PORT_CH_DSS1_TX = 0x20d5,
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PORT_CH_DSS2_RX = 0x20d6,
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PORT_CH_DSS2_TX = 0x20d7,
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PORT_CH_DSS3_RX = 0x20d8,
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PORT_CH_DSS3_TX = 0x20d9,
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PORT_CH_DSS4_RX = 0x20da,
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PORT_CH_DSS4_TX = 0x20db,
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PORT_CH_DSS5_RX = 0x20dc,
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PORT_CH_DSS5_TX = 0x20dd,
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PORT_CH_DSS6_RX = 0x20de,
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PORT_CH_DSS6_TX = 0x20df,
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PORT_CH_DSS7_RX = 0x20e0,
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PORT_CH_DSS7_TX = 0x20e1,
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};
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struct t7xx_port;
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struct port_ops {
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int (*init)(struct t7xx_port *port);
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int (*recv_skb)(struct t7xx_port *port, struct sk_buff *skb);
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void (*md_state_notify)(struct t7xx_port *port, unsigned int md_state);
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void (*uninit)(struct t7xx_port *port);
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int (*enable_chl)(struct t7xx_port *port);
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int (*disable_chl)(struct t7xx_port *port);
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};
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struct t7xx_port_conf {
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enum port_ch tx_ch;
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enum port_ch rx_ch;
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unsigned char txq_index;
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unsigned char rxq_index;
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unsigned char txq_exp_index;
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unsigned char rxq_exp_index;
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enum cldma_id path_id;
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struct port_ops *ops;
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char *name;
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enum wwan_port_type port_type;
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};
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struct t7xx_port {
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/* Members not initialized in definition */
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const struct t7xx_port_conf *port_conf;
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struct wwan_port *wwan_port;
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struct t7xx_pci_dev *t7xx_dev;
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struct device *dev;
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u16 seq_nums[2]; /* TX/RX sequence numbers */
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atomic_t usage_cnt;
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struct list_head entry;
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struct list_head queue_entry;
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/* TX and RX flows are asymmetric since ports are multiplexed on
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* queues.
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*
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* TX: data blocks are sent directly to a queue. Each port
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* does not maintain a TX list; instead, they only provide
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* a wait_queue_head for blocking writes.
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*
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* RX: Each port uses a RX list to hold packets,
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* allowing the modem to dispatch RX packet as quickly as possible.
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*/
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struct sk_buff_head rx_skb_list;
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spinlock_t port_update_lock; /* Protects port configuration */
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wait_queue_head_t rx_wq;
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int rx_length_th;
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bool chan_enable;
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struct task_struct *thread;
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};
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struct sk_buff *t7xx_port_alloc_skb(int payload);
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struct sk_buff *t7xx_ctrl_alloc_skb(int payload);
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int t7xx_port_enqueue_skb(struct t7xx_port *port, struct sk_buff *skb);
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int t7xx_port_send_skb(struct t7xx_port *port, struct sk_buff *skb, unsigned int pkt_header,
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unsigned int ex_msg);
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int t7xx_port_send_ctl_skb(struct t7xx_port *port, struct sk_buff *skb, unsigned int msg,
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unsigned int ex_msg);
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#endif /* __T7XX_PORT_H__ */
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