cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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iosm_ipc_imem_ops.h (4292B)

      1/* SPDX-License-Identifier: GPL-2.0-only
      2 *
      3 * Copyright (C) 2020-21 Intel Corporation.
      4 */
      5
      6#ifndef IOSM_IPC_IMEM_OPS_H
      7#define IOSM_IPC_IMEM_OPS_H
      8
      9#include "iosm_ipc_mux_codec.h"
     10
     11/* Maximum wait time for blocking read */
     12#define IPC_READ_TIMEOUT 3000
     13
     14/* The delay in ms for defering the unregister */
     15#define SIO_UNREGISTER_DEFER_DELAY_MS 1
     16
     17/* Default delay till CP PSI image is running and modem updates the
     18 * execution stage.
     19 * unit : milliseconds
     20 */
     21#define PSI_START_DEFAULT_TIMEOUT 3000
     22
     23/* Default time out when closing SIO, till the modem is in
     24 * running state.
     25 * unit : milliseconds
     26 */
     27#define BOOT_CHECK_DEFAULT_TIMEOUT 400
     28
     29/* IP MUX channel range */
     30#define IP_MUX_SESSION_START 0
     31#define IP_MUX_SESSION_END 7
     32
     33/* Default IP MUX channel */
     34#define IP_MUX_SESSION_DEFAULT	0
     35
     36/**
     37 * ipc_imem_sys_port_open - Open a port link to CP.
     38 * @ipc_imem:	Imem instance.
     39 * @chl_id:	Channel Indentifier.
     40 * @hp_id:	HP Indentifier.
     41 *
     42 * Return: channel instance on success, NULL for failure
     43 */
     44struct ipc_mem_channel *ipc_imem_sys_port_open(struct iosm_imem *ipc_imem,
     45					       int chl_id, int hp_id);
     46void ipc_imem_sys_port_close(struct iosm_imem *ipc_imem,
     47			     struct ipc_mem_channel *channel);
     48
     49/**
     50 * ipc_imem_sys_cdev_write - Route the uplink buffer to CP.
     51 * @ipc_cdev:		iosm_cdev instance.
     52 * @skb:		Pointer to skb.
     53 *
     54 * Return: 0 on success and failure value on error
     55 */
     56int ipc_imem_sys_cdev_write(struct iosm_cdev *ipc_cdev, struct sk_buff *skb);
     57
     58/**
     59 * ipc_imem_sys_wwan_open - Open packet data online channel between network
     60 *			layer and CP.
     61 * @ipc_imem:		Imem instance.
     62 * @if_id:		ip link tag of the net device.
     63 *
     64 * Return: Channel ID on success and failure value on error
     65 */
     66int ipc_imem_sys_wwan_open(struct iosm_imem *ipc_imem, int if_id);
     67
     68/**
     69 * ipc_imem_sys_wwan_close - Close packet data online channel between network
     70 *			 layer and CP.
     71 * @ipc_imem:		Imem instance.
     72 * @if_id:		IP link id net device.
     73 * @channel_id:		Channel ID to be closed.
     74 */
     75void ipc_imem_sys_wwan_close(struct iosm_imem *ipc_imem, int if_id,
     76			     int channel_id);
     77
     78/**
     79 * ipc_imem_sys_wwan_transmit - Function for transfer UL data
     80 * @ipc_imem:		Imem instance.
     81 * @if_id:		link ID of the device.
     82 * @channel_id:		Channel ID used
     83 * @skb:		Pointer to sk buffer
     84 *
     85 * Return: 0 on success and failure value on error
     86 */
     87int ipc_imem_sys_wwan_transmit(struct iosm_imem *ipc_imem, int if_id,
     88			       int channel_id, struct sk_buff *skb);
     89/**
     90 * ipc_imem_wwan_channel_init - Initializes WWAN channels and the channel for
     91 *				MUX.
     92 * @ipc_imem:		Pointer to iosm_imem struct.
     93 * @mux_type:		Type of mux protocol.
     94 */
     95void ipc_imem_wwan_channel_init(struct iosm_imem *ipc_imem,
     96				enum ipc_mux_protocol mux_type);
     97
     98/**
     99 * ipc_imem_sys_devlink_open - Open a Flash/CD Channel link to CP
    100 * @ipc_imem:   iosm_imem instance
    101 *
    102 * Return:	channel instance on success, NULL for failure
    103 */
    104struct ipc_mem_channel *ipc_imem_sys_devlink_open(struct iosm_imem *ipc_imem);
    105
    106/**
    107 * ipc_imem_sys_devlink_close - Release a Flash/CD channel link to CP
    108 * @ipc_devlink:	Pointer to ipc_devlink data-struct
    109 *
    110 */
    111void ipc_imem_sys_devlink_close(struct iosm_devlink *ipc_devlink);
    112
    113/**
    114 * ipc_imem_sys_devlink_notify_rx - Receive downlink characters from CP,
    115 *				the downlink skbuf is added at the end of the
    116 *				downlink or rx list
    117 * @ipc_devlink:	Pointer to ipc_devlink data-struct
    118 * @skb:		Pointer to sk buffer
    119 */
    120void ipc_imem_sys_devlink_notify_rx(struct iosm_devlink *ipc_devlink,
    121				    struct sk_buff *skb);
    122
    123/**
    124 * ipc_imem_sys_devlink_read - Copy the rx data and free the skbuf
    125 * @ipc_devlink:	Devlink instance
    126 * @data:		Buffer to read the data from modem
    127 * @bytes_to_read:	Size of destination buffer
    128 * @bytes_read:		Number of bytes read
    129 *
    130 * Return: 0 on success and failure value on error
    131 */
    132int ipc_imem_sys_devlink_read(struct iosm_devlink *ipc_devlink, u8 *data,
    133			      u32 bytes_to_read, u32 *bytes_read);
    134
    135/**
    136 * ipc_imem_sys_devlink_write - Route the uplink buffer to CP
    137 * @ipc_devlink:	Devlink_sio instance
    138 * @buf:		Pointer to buffer
    139 * @count:		Number of data bytes to write
    140 * Return:		0 on success and failure value on error
    141 */
    142int ipc_imem_sys_devlink_write(struct iosm_devlink *ipc_devlink,
    143			       unsigned char *buf, int count);
    144
    145#endif