root/sound/soc/intel/common/sst-ipc.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Intel SST generic IPC Support
   4  *
   5  * Copyright (C) 2015, Intel Corporation. All rights reserved.
   6  */
   7 
   8 #ifndef __SST_GENERIC_IPC_H
   9 #define __SST_GENERIC_IPC_H
  10 
  11 #include <linux/types.h>
  12 #include <linux/kernel.h>
  13 #include <linux/wait.h>
  14 #include <linux/list.h>
  15 #include <linux/workqueue.h>
  16 #include <linux/sched.h>
  17 
  18 #define IPC_MAX_MAILBOX_BYTES   256
  19 
  20 struct sst_ipc_message {
  21         u64 header;
  22         void *data;
  23         size_t size;
  24 };
  25 
  26 struct ipc_message {
  27         struct list_head list;
  28         struct sst_ipc_message tx;
  29         struct sst_ipc_message rx;
  30 
  31         wait_queue_head_t waitq;
  32         bool pending;
  33         bool complete;
  34         bool wait;
  35         int errno;
  36 };
  37 
  38 struct sst_generic_ipc;
  39 struct sst_dsp;
  40 
  41 struct sst_plat_ipc_ops {
  42         void (*tx_msg)(struct sst_generic_ipc *, struct ipc_message *);
  43         void (*shim_dbg)(struct sst_generic_ipc *, const char *);
  44         void (*tx_data_copy)(struct ipc_message *, char *, size_t);
  45         u64  (*reply_msg_match)(u64 header, u64 *mask);
  46         bool (*is_dsp_busy)(struct sst_dsp *dsp);
  47         int (*check_dsp_lp_on)(struct sst_dsp *dsp, bool state);
  48 };
  49 
  50 /* SST generic IPC data */
  51 struct sst_generic_ipc {
  52         struct device *dev;
  53         struct sst_dsp *dsp;
  54 
  55         /* IPC messaging */
  56         struct list_head tx_list;
  57         struct list_head rx_list;
  58         struct list_head empty_list;
  59         wait_queue_head_t wait_txq;
  60         struct task_struct *tx_thread;
  61         struct work_struct kwork;
  62         bool pending;
  63         struct ipc_message *msg;
  64         int tx_data_max_size;
  65         int rx_data_max_size;
  66 
  67         struct sst_plat_ipc_ops ops;
  68 };
  69 
  70 int sst_ipc_tx_message_wait(struct sst_generic_ipc *ipc,
  71         struct sst_ipc_message request, struct sst_ipc_message *reply);
  72 
  73 int sst_ipc_tx_message_nowait(struct sst_generic_ipc *ipc,
  74         struct sst_ipc_message request);
  75 
  76 int sst_ipc_tx_message_nopm(struct sst_generic_ipc *ipc,
  77         struct sst_ipc_message request, struct sst_ipc_message *reply);
  78 
  79 struct ipc_message *sst_ipc_reply_find_msg(struct sst_generic_ipc *ipc,
  80         u64 header);
  81 
  82 void sst_ipc_tx_msg_reply_complete(struct sst_generic_ipc *ipc,
  83         struct ipc_message *msg);
  84 
  85 void sst_ipc_drop_all(struct sst_generic_ipc *ipc);
  86 int sst_ipc_init(struct sst_generic_ipc *ipc);
  87 void sst_ipc_fini(struct sst_generic_ipc *ipc);
  88 
  89 #endif