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