1 files changed, 156 insertions, 0 deletions
diff --git a/kernel-headers/linux/rpmsg_omx.h b/kernel-headers/linux/rpmsg_omx.h
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+++ b/kernel-headers/linux/rpmsg_omx.h
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+/*
+ * OMX offloading remote processor driver
+ *
+ * Copyright(c) 2011 Texas Instruments. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in
+ *   the documentation and/or other materials provided with the
+ *   distribution.
+ * * Neither the name Texas Instruments nor the names of its
+ *   contributors may be used to endorse or promote products derived
+ *   from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef RPMSG_OMX_H
+#define RPMSG_OMX_H
+
+#include <linux/ioctl.h>
+
+/**
+ * struct omx_pvr_data - metadata passed to/from userspace for a pvr register
+ * @fd:           a file descriptor representing a pvr handle
+ * @num_handles:  field filled by driver. userspace uses this to determine
+ *                number of handles associated with fd
+ * @handles:      opaque pointers pointing to buffers
+ */
+struct omx_pvr_data {
+	int fd;
+	unsigned int num_handles;
+	void *handles[2];
+};
+
+#define OMX_IOC_MAGIC	'X'
+
+#define OMX_IOCCONNECT		_IOW(OMX_IOC_MAGIC, 1, char *)
+#define OMX_IOCIONREGISTER	_IOWR(OMX_IOC_MAGIC, 2, struct ion_fd_data)
+#define OMX_IOCIONUNREGISTER	_IOWR(OMX_IOC_MAGIC, 3, struct ion_fd_data)
+#define OMX_IOCPVRREGISTER	_IOWR(OMX_IOC_MAGIC, 4, struct omx_pvr_data)
+#define OMX_IOC_MAXNR	(4)
+#ifdef __KERNEL__
+
+/**
+ * enum omx_msg_types - various message types currently supported
+ *
+ * @OMX_CONN_REQ: a connection request message type. the message should carry
+ * the name of the OMX service which we try to connect to. An instance of
+ * that service will be created remotely, and its address will be sent as
+ * a reply.
+ *
+ * @OMX_CONN_RSP: a response to a connection request. the message will carry
+ * an error code (success/failure), and if connection established successfully,
+ * the addr field will carry the address of the newly created OMX instance.
+ *
+ * @OMX_DISCONNECT: disconnect remote OMX instance. this message tells
+ * remote processor to release the resources coupled with this connection
+ *
+ * @OMX_RAW_MSG: a message that should be propagated as-is to the user.
+ * this would immediately enable user space development to start.
+ * as we progress, most likely this message won't be needed anymore.
+ */
+enum omx_msg_types {
+	OMX_CONN_REQ = 0,
+	OMX_CONN_RSP = 1,
+	OMX_DISCONNECT = 4,
+	OMX_RAW_MSG = 5,
+	/* todo: do we need a disconnect response ? ION refcounts should allow
+	 * asynchronous release of relevant buffers */
+};
+
+/**
+ * enum omx_error_codes - various error codes that will be used
+ *
+ * @OMX_SUCCESS: success
+ *
+ * @OMX_NOTSUPP: not supported
+ *
+ * @OMX_NOMEM: remote processor is out of memory
+ */
+enum omx_error_codes {
+	OMX_SUCCESS = 0,
+	OMX_NOTSUPP = 1,
+	OMX_NOMEM = 2,
+};
+
+/* keep documenting... */
+enum omx_state {
+	OMX_UNCONNECTED,
+	OMX_CONNECTED,
+	OMX_FAIL,
+};
+
+/**
+ * struct omx_msg_hdr - common header for all OMX messages
+ * @type:	type of message, see enum omx_msg_types
+ * @flags:	currently unused, should be zero
+ * @len:	length of msg payload (in bytes)
+ * @data:	the msg payload (depends on the message type)
+ *
+ * All OMX messages will start with this common header (which will begin
+ * right after the standard rpmsg header ends).
+ */
+struct omx_msg_hdr {
+	u32 type;
+	u32 flags;
+	u32 len;
+	char data[0];
+} __packed;
+
+struct omx_conn_rsp {
+	u32 status;
+	u32 addr;
+} __packed;
+
+struct omx_disc_req {
+	u32 addr;
+} __packed;
+
+
+#endif /* __KERNEL__ */
+
+/* temporarily exposed to user space too */
+struct omx_conn_req {
+	char name[48];
+} __packed;
+
+/* the packet structure (actual message sent to omx service) */
+struct omx_packet {
+	uint16_t      desc;	/* descriptor, and omx service status */
+	uint16_t      msg_id;	/* message id */
+	uint32_t      flags;	/* Set to a fixed value for now. */
+	uint32_t      fxn_idx;	/* Index into OMX service's function table.*/
+	int32_t       result;	/* The OMX function status. */
+	uint32_t      data_size;/* Size of in/out data to/from the function. */
+	uint32_t      data[0];	/* Payload of data_size char's passed to
+				   function. */
+};
+
+#endif /* RPMSG_OMX_H */