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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Intel SST generic IPC Support4 *5 * Copyright (C) 2015, Intel Corporation6 */7 8#ifndef __SST_GENERIC_IPC_H9#define __SST_GENERIC_IPC_H10 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 18struct sst_ipc_message {19 u64 header;20 void *data;21 size_t size;22};23 24struct ipc_message {25 struct list_head list;26 struct sst_ipc_message tx;27 struct sst_ipc_message rx;28 29 wait_queue_head_t waitq;30 bool pending;31 bool complete;32 bool wait;33 int errno;34};35 36struct sst_generic_ipc;37struct sst_dsp;38 39struct sst_plat_ipc_ops {40 void (*tx_msg)(struct sst_generic_ipc *, struct ipc_message *);41 void (*shim_dbg)(struct sst_generic_ipc *, const char *);42 void (*tx_data_copy)(struct ipc_message *, char *, size_t);43 u64 (*reply_msg_match)(u64 header, u64 *mask);44 bool (*is_dsp_busy)(struct sst_dsp *dsp);45 int (*check_dsp_lp_on)(struct sst_dsp *dsp, bool state);46};47 48/* SST generic IPC data */49struct sst_generic_ipc {50 struct device *dev;51 struct sst_dsp *dsp;52 53 /* IPC messaging */54 struct list_head tx_list;55 struct list_head rx_list;56 struct list_head empty_list;57 wait_queue_head_t wait_txq;58 struct task_struct *tx_thread;59 struct work_struct kwork;60 bool pending;61 struct ipc_message *msg;62 int tx_data_max_size;63 int rx_data_max_size;64 65 struct sst_plat_ipc_ops ops;66};67 68int sst_ipc_tx_message_wait(struct sst_generic_ipc *ipc,69 struct sst_ipc_message request, struct sst_ipc_message *reply);70 71int sst_ipc_tx_message_nowait(struct sst_generic_ipc *ipc,72 struct sst_ipc_message request);73 74int sst_ipc_tx_message_nopm(struct sst_generic_ipc *ipc,75 struct sst_ipc_message request, struct sst_ipc_message *reply);76 77struct ipc_message *sst_ipc_reply_find_msg(struct sst_generic_ipc *ipc,78 u64 header);79 80void sst_ipc_tx_msg_reply_complete(struct sst_generic_ipc *ipc,81 struct ipc_message *msg);82 83int sst_ipc_init(struct sst_generic_ipc *ipc);84void sst_ipc_fini(struct sst_generic_ipc *ipc);85 86#endif87