Commit ec3d41c4 authored by Rusty Russell's avatar Rusty Russell
Browse files

Virtio interface 



This attempts to implement a "virtual I/O" layer which should allow
common drivers to be efficiently used across most virtual I/O
mechanisms.  It will no-doubt need further enhancement.

The virtio drivers add buffers to virtio queues; as the buffers are consumed
the driver "interrupt" callbacks are invoked.

There is also a generic implementation of config space which drivers can query
to get setup information from the host.

Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
Cc: Dor Laor <dor.laor@qumranet.com>
Cc: Arnd Bergmann <arnd@arndb.de>
parent 47436aa4

drivers/Kconfig

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@@ -93,4 +93,6 @@ source "drivers/auxdisplay/Kconfig" 
source "drivers/kvm/Kconfig"



source "drivers/uio/Kconfig"



source "drivers/virtio/Kconfig"

endmenu

drivers/Makefile

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@@ -91,3 +91,4 @@ obj-$(CONFIG_HID) += hid/ 
obj-$(CONFIG_PPC_PS3)		+= ps3/

obj-$(CONFIG_OF)		+= of/

obj-$(CONFIG_SSB)		+= ssb/

obj-$(CONFIG_VIRTIO)		+= virtio/

drivers/virtio/Kconfig

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# Virtio always gets selected by whoever wants it.

config VIRTIO

	bool

drivers/virtio/Makefile

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obj-$(CONFIG_VIRTIO) += virtio.o

drivers/virtio/config.c

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/* Configuration space parsing helpers for virtio.

 *

 * The configuration is [type][len][... len bytes ...] fields.

 *

 * Copyright 2007 Rusty Russell, IBM Corporation.

 * GPL v2 or later.

 */

#include <linux/err.h>

#include <linux/virtio.h>

#include <linux/virtio_config.h>

#include <linux/bug.h>

#include <asm/system.h>

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