/* SPDX-License-Identifier: GPL-2.0-only */ /* * Intel SST generic IPC Support * * Copyright (C) 2015, Intel Corporation. All rights reserved. */ #ifndef __SST_GENERIC_IPC_H #define __SST_GENERIC_IPC_H #include <linux/types.h> #include <linux/kernel.h> #include <linux/wait.h> #include <linux/list.h> #include <linux/workqueue.h> #include <linux/sched.h> struct sst_ipc_message { u64 header; void *data; size_t size; }; struct ipc_message { struct list_head list; struct sst_ipc_message tx; struct sst_ipc_message rx; wait_queue_head_t waitq; bool pending; bool complete; bool wait; int errno; }; struct sst_generic_ipc; struct sst_dsp; struct sst_plat_ipc_ops { void (*tx_msg)(struct sst_generic_ipc *, struct ipc_message *); void (*shim_dbg)(struct sst_generic_ipc *, const char *); void (*tx_data_copy)(struct ipc_message *, char *, size_t); u64 (*reply_msg_match)(u64 header, u64 *mask); bool (*is_dsp_busy)(struct sst_dsp *dsp); int (*check_dsp_lp_on)(struct sst_dsp *dsp, bool state); }; /* SST generic IPC data */ struct sst_generic_ipc { struct device *dev; struct sst_dsp *dsp; /* IPC messaging */ struct list_head tx_list; struct list_head rx_list; struct list_head empty_list; wait_queue_head_t wait_txq; struct task_struct *tx_thread; struct work_struct kwork; bool pending; struct ipc_message *msg; int tx_data_max_size; int rx_data_max_size; struct sst_plat_ipc_ops ops; }; int sst_ipc_tx_message_wait(struct sst_generic_ipc *ipc, struct sst_ipc_message request, struct sst_ipc_message *reply); int sst_ipc_tx_message_nowait(struct sst_generic_ipc *ipc, struct sst_ipc_message request); int sst_ipc_tx_message_nopm(struct sst_generic_ipc *ipc, struct sst_ipc_message request, struct sst_ipc_message *reply); struct ipc_message *sst_ipc_reply_find_msg(struct sst_generic_ipc *ipc, u64 header); void sst_ipc_tx_msg_reply_complete(struct sst_generic_ipc *ipc, struct ipc_message *msg); int sst_ipc_init(struct sst_generic_ipc *ipc); void sst_ipc_fini(struct sst_generic_ipc *ipc); #endif