drivers/net/wwan/iosm/iosm_ipc_trace.h

   1 /* SPDX-License-Identifier: GPL-2.0-only
   2  *
   3  * Copyright (C) 2020-2021 Intel Corporation.
   4  */
   5
   6 #ifndef IOSM_IPC_TRACE_H
   7 #define IOSM_IPC_TRACE_H
   8
   9 #include <linux/debugfs.h>
  10 #include <linux/relay.h>
  11
  12 #include "iosm_ipc_chnl_cfg.h"
  13 #include "iosm_ipc_imem_ops.h"
  14
  15 /**
  16  * enum trace_ctrl_mode - State of trace channel
  17  * @TRACE_DISABLE:      mode for disable trace
  18  * @TRACE_ENABLE:       mode for enable trace
  19  */
  20 enum trace_ctrl_mode {
  21         TRACE_DISABLE = 0,
  22         TRACE_ENABLE,
  23 };
  24
  25 /**
  26  * struct iosm_trace - Struct for trace interface
  27  * @ipc_rchan:          Pointer to relay channel
  28  * @ctrl_file:          Pointer to trace control file
  29  * @ipc_imem:           Imem instance
  30  * @dev:                Pointer to device struct
  31  * @channel:            Channel instance
  32  * @chl_id:             Channel Indentifier
  33  * @trc_mutex:          Mutex used for read and write mode
  34  * @mode:               Mode for enable and disable trace
  35  */
  36
  37 struct iosm_trace {
  38         struct rchan *ipc_rchan;
  39         struct dentry *ctrl_file;
  40         struct iosm_imem *ipc_imem;
  41         struct device *dev;
  42         struct ipc_mem_channel *channel;
  43         enum ipc_channel_id chl_id;
  44         struct mutex trc_mutex; /* Mutex used for read and write mode */
  45         enum trace_ctrl_mode mode;
  46 };
  47
  48 #ifdef CONFIG_WWAN_DEBUGFS
  49
  50 static inline bool ipc_is_trace_channel(struct iosm_imem *ipc_mem, u16 chl_id)
  51 {
  52         return ipc_mem->trace && ipc_mem->trace->chl_id == chl_id;
  53 }
  54
  55 struct iosm_trace *ipc_trace_init(struct iosm_imem *ipc_imem);
  56 void ipc_trace_deinit(struct iosm_trace *ipc_trace);
  57 void ipc_trace_port_rx(struct iosm_imem *ipc_imem, struct sk_buff *skb);
  58
  59 #else
  60
  61 static inline bool ipc_is_trace_channel(struct iosm_imem *ipc_mem, u16 chl_id)
  62 {
  63         return false;
  64 }
  65
  66 static inline void ipc_trace_port_rx(struct iosm_imem *ipc_imem,
  67                                      struct sk_buff *skb)
  68 {
  69         dev_kfree_skb(skb);
  70 }
  71
  72 #endif
  73
  74 #endif