linux-toradex.git/drivers/virtio, branch v4.0-rc1

virtio: don't set VIRTIO_CONFIG_S_DRIVER_OK twice.

2015-02-17T05:49:29+00:00

I noticed this with the console device.  It's not *wrong*, just a bit
weird.

Signed-off-by: Rusty Russell

virtio_pci: use 16-bit accessor for queue_enable.

2015-02-11T04:33:16+00:00

Since PCI is little endian, 8-bit access might work, but the spec section
is very clear on this:

  4.1.3.1 Driver Requirements: PCI Device Layout

  The driver MUST access each field using the “natural” access method,
  i.e. 32-bit accesses for 32-bit fields, 16-bit accesses for 16-bit
  fields and 8-bit accesses for 8-bit fields.

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

virtio: Avoid possible kernel panic if DEBUG is enabled.

2015-02-11T04:33:14+00:00

The virtqueue_add() calls START_USE() upon entry. The virtqueue_kick() is
called if vq->num_added == (1 << 16) - 1 before calling END_USE().
The virtqueue_kick_prepare() called via virtqueue_kick() calls START_USE()
upon entry, and will call panic() if DEBUG is enabled.
Move this virtqueue_kick() call to after END_USE() call.

Signed-off-by: Tetsuo Handa 
Signed-off-by: Rusty Russell

virtio-mmio: Update the device to OASIS spec version

2015-01-23T04:27:10+00:00

This patch add a support for second version of the virtio-mmio device,
which follows OASIS "Virtual I/O Device (VIRTIO) Version 1.0"
specification.

Main changes:

1. The control register symbolic names use the new device/driver
   nomenclature rather than the old guest/host one.

2. The driver detect the device version (version 1 is the pre-OASIS
   spec, version 2 is compatible with fist revision of the OASIS spec)
   and drives the device accordingly.

3. New version uses direct addressing (64 bit address split into two
   low/high register) instead of the guest page size based one,
   and addresses each part of the queue (descriptors, available, used)
   separately.

4. The device activity is now explicitly triggered by writing to the
   "queue ready" register.

5. Whole 64 bit features are properly handled now (both ways).

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

virtio_pci_modern: drop an unused function

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

release function in modern driver is unused:
it's a left-over from when each driver had
to have its own release.

Signed-off-by: Michael S. Tsirkin

virtio_pci: add module param to force legacy mode

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

If set, try legacy interface first, modern one if that fails.  Useful to
work around device/driver bugs, and for compatibility testing.

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

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: drop Kconfig warnings

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

The ABI *is* stable, and has been for a while now.
Drop Kconfig warning saying that it's not guaranteed
to work.

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

virtio_pci: Kconfig grammar fix

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

This drivers -> this driver.

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

virtio_ring: coding style fix

2015-01-21T05:58:57+00:00

Most of our code has
struct foo {
}

Fix one instances where ring is inconsistent.

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