linux-toradex.git/include/linux/virtio_blk.h, branch tegra-9.12.15

virtio_blk: Revert serial number support

2009-10-22T06:09:30+00:00

This reverts "Add serial number support for virtio_blk, V4a".

Turns out that virtio_pci, lguest and s/390 all have an 8 bit limit
on virtio config space, so noone could ever use this.

This is coming back later in a cleaner form.

Signed-off-by: Rusty Russell 
Cc: john cooper 
Cc: Jens Axboe

virtio: let header files include virtio_ids.h

2009-10-22T06:09:28+00:00

Rusty,

commit 3ca4f5ca73057a617f9444a91022d7127041970a
    virtio: add virtio IDs file
moved all device IDs into a single file. While the change itself is
a very good one, it can break userspace applications. For example
if a userspace tool wanted to get the ID of virtio_net it used to
include virtio_net.h. This does no longer work, since virtio_net.h
does not include virtio_ids.h.
This patch moves all "#include " from the C
files into the header files, making the header files compatible with
the old ones.

In addition, this patch exports virtio_ids.h to userspace.

CC: Fernando Luis Vazquez Cao 
Signed-off-by: Christian Borntraeger 
Signed-off-by: Rusty Russell

virtio_blk: add support for cache flush

2009-09-23T12:56:36+00:00

Recent qemu has added a VIRTIO_BLK_F_FLUSH flag to advertise that the
virtual disk has a volatile write cache that needs to be flushed.  In case
we see this feature implement tell the Linux block layer about the fact
and use the new VIRTIO_BLK_T_FLUSH to flush the cache when required.  This
allows for an correct and simple implementation of write barriers.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Rusty Russell

virtio: add virtio IDs file

2009-09-23T12:56:32+00:00

Virtio IDs are spread all over the tree which makes assigning new IDs
bothersome. Putting them together should make the process less error-prone.

Signed-off-by: Fernando Luis Vazquez Cao 
Signed-off-by: Rusty Russell

lguest and virtio: cleanup struct definitions to Linux style.

2009-07-30T06:33:46+00:00

I've been doing this for years, and akpm picked me up on it about 12
months ago.  lguest partly serves as example code, so let's do it Right.

Also, remove two unused fields in struct vblk_info in the example launcher.

Signed-off-by: Rusty Russell 
Cc: Ingo Molnar

Add serial number support for virtio_blk, V4a

2009-06-09T12:41:40+00:00

This patch extracts the opaque data from pci i/o
region 0 via the added VIRTIO_BLK_F_IDENTIFY
field.  By convention this data takes the form of
that returned by an ATA IDENTIFY DEVICE command,
however the driver (except for structure size)
makes no interpretation of the data.  The structure
data is copied wholesale to userspace via a
HDIO_GET_IDENTITY ioctl command (eg: hdparm -i ).

Signed-off-by: john cooper 
Signed-off-by: Rusty Russell 
Signed-off-by: Jens Axboe

virtio_blk: SG_IO passthru support

2009-05-18T12:41:30+00:00

Add support for SG_IO passthru to virtio_blk.  We add the scsi command
block after the normal outhdr, and the scsi inhdr with full status
information aswell as the sense buffer before the regular inhdr.

[hch: forward ported, added the VIRTIO_BLK_F_SCSI flags, some comments
 and tested the whole beast]
[axboe: updated to use ->resid and not dual-path the byte count]

Signed-off-by: Hannes Reinecke 
Signed-off-by: Christoph Hellwig 
Signed-off-by: Rusty Russell  (+ checkpatch.pl tweak)
Signed-off-by: Jens Axboe

headers_check fix: linux/virtio_blk.h

2009-01-30T18:41:25+00:00

fix the following 'make headers_check' warning:

  usr/include/linux/virtio_blk.h:21: found __[us]{8,16,32,64} type without #include 

Signed-off-by: Jaswinder Singh Rajput

virtio_blk: check for hardsector size from host

2008-07-25T02:06:05+00:00

Currently virtio_blk assumes a 512 byte hard sector size. This can cause
trouble / performance issues if the backing has a different block size
(like a file on an ext3 file system formatted with 4k block size or a dasd).

Lets add a feature flag that tells the guest to use a different hard sector
size than 512 byte.

Signed-off-by: Christian Borntraeger 
Signed-off-by: Rusty Russell

virtio: clarify that ABI is usable by any implementations

2008-07-25T02:06:04+00:00

We want others to implement and use virtio, so it makes sense to BSD
license the non-__KERNEL__ parts of the headers to make this crystal
clear.

Signed-off-by: Rusty Russell 
Acked-by: Christian Borntraeger 
Acked-by: Mark McLoughlin 
Acked-by: Ryan Harper 
Acked-by: Eric Van Hensbergen 
Acked-by: Anthony Liguori