linux-toradex.git/drivers/virtio/virtio_pci_common.h, branch v4.9.130

virtio_pci: Use the DMA API if enabled

2016-03-02T15:01:58+00:00

This switches to vring_create_virtqueue, simplifying the driver and
adding DMA API support.

This fixes virtio-pci on platforms and busses that have IOMMUs.  This
will break the experimental QEMU Q35 IOMMU support until QEMU is
fixed.  In exchange, it fixes physical virtio hardware as well as
virtio-pci running under Xen.

Signed-off-by: Andy Lutomirski 
Signed-off-by: Michael S. Tsirkin

virtio: make find_vqs() checkpatch.pl-friendly

2016-01-12T18:47:06+00:00

checkpatch.pl wants arrays of strings declared as follows:

  static const char * const names[] = { "vq-1", "vq-2", "vq-3" };

Currently the find_vqs() function takes a const char *names[] argument
so passing checkpatch.pl's const char * const names[] results in a
compiler error due to losing the second const.

This patch adjusts the find_vqs() prototype and updates all virtio
transports.  This makes it possible for virtio_balloon.c, virtio_input.c,
virtgpu_kms.c, and virtio_rpmsg_bus.c to use the checkpatch.pl-friendly
type.

Signed-off-by: Stefan Hajnoczi 
Signed-off-by: Michael S. Tsirkin 
Acked-by: Bjorn Andersson

virtio-pci: alloc only resources actually used.

2015-06-24T06:15:09+00:00

Move resource allocation from common code to legacy and modern code.
Only request resources actually used, i.e. bar0 in legacy mode and
the bar(s) specified by capabilities in modern mode.

Signed-off-by: Gerd Hoffmann 

Signed-off-by: Michael S. Tsirkin

virtio_pci: add an option to disable legacy driver

2015-01-21T05:58:59+00:00

Useful for testing device virtio 1 compatibility.
Based on patch by Rusty - couldn't resist putting
that flying car joke in there!

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

virtio_pci_modern: reduce number of mappings

2015-01-21T05:58:55+00:00

We don't know the # of VQs that drivers are going to use so it's hard to
predict how much memory we'll need to map. However, the relevant
capability does give us an upper limit.
If that's below a page, we can reduce the number of required
mappings by mapping it all once ahead of the time.

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

virtio_pci: modern driver

2015-01-21T05:58:53+00:00

Lightly tested against qemu.

One thing *not* implemented here is separate mappings
for descriptor/avail/used rings. That's nice to have,
will be done later after we have core support.

This also exposes the PCI layout to userspace, and
adds macros for PCI layout offsets:

QEMU wants it, so why not?  Trust, but verify.

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

virtio_pci: move probe/remove code to common

2015-01-21T05:58:51+00:00

Most of initialization is device-independent.
Let's move it to common.

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

virtio_pci: device-specific release callback

2015-01-06T14:35:36+00:00

It turns out we need to add device-specific code
in release callback. Move it to virtio_pci_legacy.c.

Signed-off-by: Michael S. Tsirkin

virtio_pci: move probe to common file

2014-12-14T13:10:30+00:00

It turns out this make everything easier.

Signed-off-by: Michael S. Tsirkin

virtio_pci_common.h: drop VIRTIO_PCI_NO_LEGACY

2014-12-11T18:04:39+00:00

Legacy drivers use virtio_pci_common.h too, we should not
define VIRTIO_PCI_NO_LEGACY there.

Signed-off-by: Michael S. Tsirkin