drivers/net/wwan/iosm/iosm_ipc_imem_ops.h

   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  */
  44 struct ipc_mem_channel *ipc_imem_sys_port_open(struct iosm_imem *ipc_imem,
  45                                                int chl_id, int hp_id);
  46 void 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  */
  56 int 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  */
  66 int 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  */
  75 void 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  */
  87 int 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  */
  95 void 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  */
 104 struct 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  */
 111 void 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  */
 120 void 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  */
 132 int 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  */
 142 int ipc_imem_sys_devlink_write(struct iosm_devlink *ipc_devlink,
 143                                unsigned char *buf, int count);
 144
 145 #endif