[deliverable/linux.git] / drivers / staging / hv / channel.h

/*
 *
 * Copyright (c) 2009, Microsoft Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307 USA.
 *
 * Authors:
 *   Haiyang Zhang <haiyangz@microsoft.com>
 *   Hank Janssen  <hjanssen@microsoft.com>
 *
 */


#ifndef _CHANNEL_H_
#define _CHANNEL_H_

#include "channel_mgmt.h"

/* The format must be the same as struct vmdata_gpa_direct */
struct vmbus_channel_packet_page_buffer {
	u16 type;
	u16 dataoffset8;
	u16 length8;
	u16 flags;
	u64 transactionid;
	u32 reserved;
	u32 rangecount;
	struct hv_page_buffer range[MAX_PAGE_BUFFER_COUNT];
} __attribute__((packed));

/* The format must be the same as struct vmdata_gpa_direct */
struct vmbus_channel_packet_multipage_buffer {
	u16 type;
	u16 dataoffset8;
	u16 length8;
	u16 flags;
	u64 transactionid;
	u32 reserved;
	u32 rangecount;		/* Always 1 in this case */
	struct hv_multipage_buffer range;
} __attribute__((packed));


extern int vmbus_open(struct vmbus_channel *channel,
			    u32 send_ringbuffersize,
			    u32 recv_ringbuffersize,
			    void *userdata,
			    u32 userdatalen,
			    void(*onchannel_callback)(void *context),
			    void *context);

extern void vmbus_close(struct vmbus_channel *channel);

extern int vmbus_sendpacket(struct vmbus_channel *channel,
				  const void *buffer,
				  u32 bufferLen,
				  u64 requestid,
				  enum vmbus_packet_type type,
				  u32 flags);

extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
					    struct hv_page_buffer pagebuffers[],
					    u32 pagecount,
					    void *buffer,
					    u32 bufferlen,
					    u64 requestid);

extern int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel,
					struct hv_multipage_buffer *mpb,
					void *buffer,
					u32 bufferlen,
					u64 requestid);

extern int vmbus_establish_gpadl(struct vmbus_channel *channel,
				      void *kbuffer,
				      u32 size,
				      u32 *gpadl_handle);

extern int vmbus_teardown_gpadl(struct vmbus_channel *channel,
				     u32 gpadl_handle);

extern int vmbus_recvpacket(struct vmbus_channel *channel,
				  void *buffer,
				  u32 bufferlen,
				  u32 *buffer_actual_len,
				  u64 *requestid);

extern int vmbus_recvpacket_raw(struct vmbus_channel *channel,
				     void *buffer,
				     u32 bufferlen,
				     u32 *buffer_actual_len,
				     u64 *requestid);

extern void vmbus_onchannel_event(struct vmbus_channel *channel);

extern void vmbus_get_debug_info(struct vmbus_channel *channel,
				     struct vmbus_channel_debug_info *debug);

extern void vmbus_ontimer(unsigned long data);

#endif /* _CHANNEL_H_ */
Commit	Line	Data
3e7ee490 HJ	1	/*
	2	*
	3	* Copyright (c) 2009, Microsoft Corporation.
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms and conditions of the GNU General Public License,
	7	* version 2, as published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along with
	15	* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
	16	* Place - Suite 330, Boston, MA 02111-1307 USA.
	17	*
	18	* Authors:
	19	* Haiyang Zhang <haiyangz@microsoft.com>
	20	* Hank Janssen <hjanssen@microsoft.com>
	21	*
	22	*/
	23
	24
	25	#ifndef _CHANNEL_H_
	26	#define _CHANNEL_H_
	27
ff39524b	28	#include "channel_mgmt.h"
3e7ee490	29
8dc0a06a	30	/* The format must be the same as struct vmdata_gpa_direct */
430a8e9a HZ	31	struct vmbus_channel_packet_page_buffer {
	32	u16 type;
	33	u16 dataoffset8;
	34	u16 length8;
	35	u16 flags;
	36	u64 transactionid;
	37	u32 reserved;
	38	u32 rangecount;
	39	struct hv_page_buffer range[MAX_PAGE_BUFFER_COUNT];
46a05253	40	} __attribute__((packed));
3e7ee490	41
8dc0a06a	42	/* The format must be the same as struct vmdata_gpa_direct */
430a8e9a HZ	43	struct vmbus_channel_packet_multipage_buffer {
	44	u16 type;
	45	u16 dataoffset8;
	46	u16 length8;
	47	u16 flags;
	48	u64 transactionid;
	49	u32 reserved;
	50	u32 rangecount; /* Always 1 in this case */
	51	struct hv_multipage_buffer range;
46a05253 GKH	52	} __attribute__((packed));
	53
	54
fff41b2e HZ	55	extern int vmbus_open(struct vmbus_channel *channel,
	56	u32 send_ringbuffersize,
	57	u32 recv_ringbuffersize,
	58	void *userdata,
	59	u32 userdatalen,
	60	void(onchannel_callback)(void context),
	61	void *context);
	62
	63	extern void vmbus_close(struct vmbus_channel *channel);
	64
	65	extern int vmbus_sendpacket(struct vmbus_channel *channel,
	66	const void *buffer,
	67	u32 bufferLen,
	68	u64 requestid,
	69	enum vmbus_packet_type type,
	70	u32 flags);
	71
	72	extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
	73	struct hv_page_buffer pagebuffers[],
	74	u32 pagecount,
	75	void *buffer,
	76	u32 bufferlen,
	77	u64 requestid);
	78
	79	extern int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel,
ee3d7ddf	80	struct hv_multipage_buffer *mpb,
fff41b2e HZ	81	void *buffer,
	82	u32 bufferlen,
	83	u64 requestid);
46a05253	84
fff41b2e HZ	85	extern int vmbus_establish_gpadl(struct vmbus_channel *channel,
	86	void *kbuffer,
	87	u32 size,
	88	u32 *gpadl_handle);
46a05253	89
fff41b2e HZ	90	extern int vmbus_teardown_gpadl(struct vmbus_channel *channel,
fff41b2e HZ	91	u32 gpadl_handle);
46a05253	92
fff41b2e HZ	93	extern int vmbus_recvpacket(struct vmbus_channel *channel,
	94	void *buffer,
	95	u32 bufferlen,
	96	u32 *buffer_actual_len,
	97	u64 *requestid);
46a05253	98
fff41b2e HZ	99	extern int vmbus_recvpacket_raw(struct vmbus_channel *channel,
	100	void *buffer,
	101	u32 bufferlen,
	102	u32 *buffer_actual_len,
	103	u64 *requestid);
46a05253	104
fff41b2e	105	extern void vmbus_onchannel_event(struct vmbus_channel *channel);
46a05253	106
fff41b2e	107	extern void vmbus_get_debug_info(struct vmbus_channel *channel,
aded7165	108	struct vmbus_channel_debug_info *debug);
46a05253	109
fff41b2e	110	extern void vmbus_ontimer(unsigned long data);
46a05253	111
454f18a9	112	#endif /* _CHANNEL_H_ */