channel.c File Reference

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/hyperv.h>
#include "hyperv_vmbus.h"

Go to the source code of this file.

Macros
#define	pr_fmt(fmt)   KBUILD_MODNAME ": " fmt
#define	NUM_PAGES_SPANNED(addr, len)   ((PAGE_ALIGN(addr + len) >> PAGE_SHIFT) - (addr >> PAGE_SHIFT))

Functions
void	vmbus_get_debug_info (struct vmbus_channel *channel, struct vmbus_channel_debug_info *debuginfo)
int	vmbus_open (struct vmbus_channel *newchannel, u32 send_ringbuffer_size, u32 recv_ringbuffer_size, void *userdata, u32 userdatalen, void(*onchannelcallback)(void *context), void *context)
	EXPORT_SYMBOL_GPL (vmbus_open)
int	vmbus_establish_gpadl (struct vmbus_channel *channel, void *kbuffer, u32 size, u32 *gpadl_handle)
	EXPORT_SYMBOL_GPL (vmbus_establish_gpadl)
int	vmbus_teardown_gpadl (struct vmbus_channel *channel, u32 gpadl_handle)
	EXPORT_SYMBOL_GPL (vmbus_teardown_gpadl)
void	vmbus_close (struct vmbus_channel *channel)
	EXPORT_SYMBOL_GPL (vmbus_close)
int	vmbus_sendpacket (struct vmbus_channel *channel, const void *buffer, u32 bufferlen, u64 requestid, enum vmbus_packet_type type, u32 flags)
	EXPORT_SYMBOL (vmbus_sendpacket)
int	vmbus_sendpacket_pagebuffer (struct vmbus_channel *channel, struct hv_page_buffer pagebuffers[], u32 pagecount, void *buffer, u32 bufferlen, u64 requestid)
	EXPORT_SYMBOL_GPL (vmbus_sendpacket_pagebuffer)
int	vmbus_sendpacket_multipagebuffer (struct vmbus_channel *channel, struct hv_multipage_buffer *multi_pagebuffer, void *buffer, u32 bufferlen, u64 requestid)
	EXPORT_SYMBOL_GPL (vmbus_sendpacket_multipagebuffer)
int	vmbus_recvpacket (struct vmbus_channel *channel, void *buffer, u32 bufferlen, u32 *buffer_actual_len, u64 *requestid)
	EXPORT_SYMBOL (vmbus_recvpacket)
int	vmbus_recvpacket_raw (struct vmbus_channel *channel, void *buffer, u32 bufferlen, u32 *buffer_actual_len, u64 *requestid)
	EXPORT_SYMBOL_GPL (vmbus_recvpacket_raw)

Macro Definition Documentation

#define NUM_PAGES_SPANNED	(		addr,
			len
	)		((PAGE_ALIGN(addr + len) >> PAGE_SHIFT) - (addr >> PAGE_SHIFT))

Definition at line 33 of file channel.c.

#define pr_fmt

(

fmt

)

KBUILD_MODNAME ": " fmt

Definition at line 21 of file channel.c.

Function Documentation

EXPORT_SYMBOL

(

vmbus_sendpacket

)

EXPORT_SYMBOL

(

vmbus_recvpacket

)

EXPORT_SYMBOL_GPL

(

vmbus_open

)

EXPORT_SYMBOL_GPL

(

vmbus_establish_gpadl

)

EXPORT_SYMBOL_GPL

(

vmbus_teardown_gpadl

)

EXPORT_SYMBOL_GPL

(

vmbus_close

)

EXPORT_SYMBOL_GPL

(

vmbus_sendpacket_pagebuffer

)

EXPORT_SYMBOL_GPL

(

vmbus_sendpacket_multipagebuffer

)

EXPORT_SYMBOL_GPL

(

vmbus_recvpacket_raw

)

void vmbus_close

(

struct vmbus_channel *

channel

)

Definition at line 514 of file channel.c.

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

Definition at line 391 of file channel.c.

void vmbus_get_debug_info	(	struct vmbus_channel *	channel,
		struct vmbus_channel_debug_info *	debuginfo
	)

Definition at line 73 of file channel.c.

int vmbus_open	(	struct vmbus_channel *	newchannel,
		u32	send_ringbuffer_size,
		u32	recv_ringbuffer_size,
		void *	userdata,
		u32	userdatalen,
		void(*)(void *context)	onchannelcallback,
		void *	context
	)

Definition at line 117 of file channel.c.

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

vmbus_recvpacket() - Retrieve the user packet on the specified channel : Pointer to vmbus_channel structure. : Pointer to the buffer you want to receive the data into. : Maximum size of what the the buffer will hold : The actual size of the data after it was received : Identifier of the request

Receives directly from the hyper-v vmbus and puts the data it received into Buffer. This will receive the data unparsed from hyper-v.

Mainly used by Hyper-V drivers.

Definition at line 736 of file channel.c.

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

Definition at line 779 of file channel.c.

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

vmbus_sendpacket() - Send the specified buffer on the given channel : Pointer to vmbus_channel structure. : Pointer to the buffer you want to receive the data into. : Maximum size of what the the buffer will hold : Identifier of the request : Type of packet that is being send e.g. negotiate, time packet etc.

Sends data in directly to hyper-v via the vmbus This will send the data unparsed to hyper-v.

Mainly used by Hyper-V drivers.

Definition at line 565 of file channel.c.

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

Definition at line 665 of file channel.c.

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

Definition at line 604 of file channel.c.

int vmbus_teardown_gpadl	(	struct vmbus_channel *	channel,
		u32	gpadl_handle
	)

Definition at line 470 of file channel.c.