Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / sound / soc / intel / common / sst-ipc.h

diff --git a/kernel/sound/soc/intel/common/sst-ipc.h b/kernel/sound/soc/intel/common/sst-ipc.h
new file mode 100644 (file)
index 0000000..125ea45
--- /dev/null
+++ b/kernel/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