diff options
Diffstat (limited to 'sound/soc/intel/common/sst-ipc.h')
-rw-r--r-- | sound/soc/intel/common/sst-ipc.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/sound/soc/intel/common/sst-ipc.h b/sound/soc/intel/common/sst-ipc.h new file mode 100644 index 000000000000..125ea451a373 --- /dev/null +++ b/sound/soc/intel/common/sst-ipc.h @@ -0,0 +1,91 @@ +/* + * Intel SST generic IPC Support + * + * Copyright (C) 2015, Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version + * 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#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> +#include <linux/kthread.h> + +#define IPC_MAX_MAILBOX_BYTES 256 + +struct ipc_message { + struct list_head list; + u64 header; + + /* direction wrt host CPU */ + char tx_data[IPC_MAX_MAILBOX_BYTES]; + size_t tx_size; + char rx_data[IPC_MAX_MAILBOX_BYTES]; + size_t rx_size; + + wait_queue_head_t waitq; + bool pending; + bool complete; + bool wait; + int errno; +}; + +struct sst_generic_ipc; + +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); +}; + +/* 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 kthread_worker kworker; + struct kthread_work kwork; + bool pending; + struct ipc_message *msg; + + struct sst_plat_ipc_ops ops; +}; + +int sst_ipc_tx_message_wait(struct sst_generic_ipc *ipc, u64 header, + void *tx_data, size_t tx_bytes, void *rx_data, size_t rx_bytes); + +int sst_ipc_tx_message_nowait(struct sst_generic_ipc *ipc, u64 header, + void *tx_data, size_t tx_bytes); + +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); + +void sst_ipc_drop_all(struct sst_generic_ipc *ipc); +int sst_ipc_init(struct sst_generic_ipc *ipc); +void sst_ipc_fini(struct sst_generic_ipc *ipc); + +#endif |