linux-toradex.git/include/linux/vringh.h, branch v4.14-rc5

virtio: add explicit big-endian support to memory accessors

2015-06-01T13:48:54+00:00

The current memory accessors logic is:
- little endian if little_endian
- native endian (i.e. no byteswap) if !little_endian

If we want to fully support cross-endian vhost, we also need to be
able to convert to big endian.

Instead of changing the little_endian argument to some 3-value enum, this
patch changes the logic to:
- little endian if little_endian
- big endian if !little_endian

The native endian case is handled by all users with a trivial helper. This
patch doesn't change any functionality, nor it does add overhead.

Signed-off-by: Greg Kurz 

Signed-off-by: Michael S. Tsirkin 
Reviewed-by: Cornelia Huck 
Reviewed-by: David Gibson

vringh: introduce vringh_is_little_endian() helper

2015-06-01T13:48:52+00:00

Signed-off-by: Greg Kurz 

Signed-off-by: Michael S. Tsirkin 
Acked-by: Cornelia Huck 
Reviewed-by: David Gibson

vringh: update for virtio 1.0 APIs

2014-12-15T21:49:28+00:00

When switching everything over to virtio 1.0 memory access APIs,
I missed converting vringh.
Fortunately, it's straight-forward.

Signed-off-by: Michael S. Tsirkin

vringh: 64 bit features

2014-12-15T21:49:23+00:00

Pass u64 everywhere.

Signed-off-by: Michael S. Tsirkin

virtio: Introduce vringh wrappers in virtio_config

2013-03-20T03:36:05+00:00

Add wrappers for the host vrings to support loose
coupling between the virtio device and driver.

A new struct vringh_config_ops with the functions
find_vrhs() and del_vrhs() is added to the virtio_device
struct. This enables virtio drivers to manage virtio
host rings without detailed knowledge of how the
vrings are created and deleted.

The function vringh_notify() is added so vringh clients
can notify the other side that buffers are added to the
used-ring.

Cc: Ohad Ben-Cohen 
Signed-off-by: Sjur Brændeland 
Signed-off-by: Rusty Russell  (constified vringh_config)

vringh: host-side implementation of virtio rings.

2013-03-20T03:35:33+00:00

Getting use of virtio rings correct is tricky, and a recent patch saw
an implementation of in-kernel rings (as separate from userspace).

This abstracts the business of dealing with the virtio ring layout
from the access (userspace or direct); to do this, we use function
pointers, which gcc inlines correctly.

Signed-off-by: Rusty Russell 
Acked-by: Michael S. Tsirkin