Commit Graph

9 Commits

Author SHA1 Message Date
Gerd Hoffmann 59a5b0f7bf virtio-pci: alloc only resources actually used.
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 <kraxel@redhat.com>

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-06-24 08:15:09 +02:00
Michael S. Tsirkin 46506da5f3 virtio_pci: add an option to disable legacy driver
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 <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2015-01-21 16:28:59 +10:30
Michael S. Tsirkin 3909213cfd virtio_pci_modern: reduce number of mappings
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 <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2015-01-21 16:28:55 +10:30
Michael S. Tsirkin 1fcf0512c9 virtio_pci: modern driver
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 <rusty@rustcorp.com.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-01-21 16:28:53 +10:30
Michael S. Tsirkin ff31d2e285 virtio_pci: move probe/remove code to common
Most of initialization is device-independent.
Let's move it to common.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2015-01-21 16:28:51 +10:30
Michael S. Tsirkin 945399a8c7 virtio_pci: device-specific release callback
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 <mst@redhat.com>
2015-01-06 16:35:36 +02:00
Michael S. Tsirkin 9a4253db0c virtio_pci: move probe to common file
It turns out this make everything easier.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-12-14 15:10:30 +02:00
Michael S. Tsirkin de2b48d581 virtio_pci_common.h: drop VIRTIO_PCI_NO_LEGACY
Legacy drivers use virtio_pci_common.h too, we should not
define VIRTIO_PCI_NO_LEGACY there.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-12-11 20:04:39 +02:00
Michael S. Tsirkin 5f4c976089 virtio_pci: rename virtio_pci -> virtio_pci_common
kbuild does not seem to like it when we name source
files same as the module.
Let's rename virtio_pci -> virtio_pci_common,
and get rid of #include-ing c files.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-12-09 21:42:05 +02:00