linux-toradex.git/drivers/vfio/platform, branch v4.2.1

VFIO: platform: enable ARM64 build

2015-06-22T15:35:47+00:00

This patch enables building VFIO platform and derivatives on ARM64.

Signed-off-by: Eric Auger 
Acked-by: Baptiste Reynal 
Tested-by: Baptiste Reynal 
Signed-off-by: Alex Williamson

VFIO: platform: Calxeda xgmac reset module

2015-06-22T15:35:38+00:00

This patch introduces a module that registers and implements a basic
reset function for the Calxeda xgmac device. This latter basically disables
interrupts and stops DMA transfers.

The reset function code is inherited from the native calxeda xgmac driver.

Signed-off-by: Eric Auger 
Acked-by: Baptiste Reynal 
Tested-by: Baptiste Reynal 
Signed-off-by: Alex Williamson

VFIO: platform: populate the reset function on probe

2015-06-22T15:35:30+00:00

The reset function lookup happens on vfio-platform probe. The reset
module load is requested  and a reference to the function symbol is
hold. The reference is released on vfio-platform remove.

Signed-off-by: Eric Auger 
Acked-by: Baptiste Reynal 
Tested-by: Baptiste Reynal 
Signed-off-by: Alex Williamson

VFIO: platform: add reset callback

2015-06-22T15:35:22+00:00

A new reset callback is introduced. If this callback is populated,
the reset is invoked on device first open/last close or upon userspace
ioctl.  The modality is exposed on VFIO_DEVICE_GET_INFO.

Signed-off-by: Eric Auger 
Acked-by: Baptiste Reynal 
Tested-by: Baptiste Reynal 
Signed-off-by: Alex Williamson

VFIO: platform: add reset struct and lookup table

2015-06-17T21:39:09+00:00

This patch introduces the vfio_platform_reset_combo struct that
stores all the information useful to handle the reset modality:
compat string, name of the reset function, name of the module that
implements the reset function. A lookup table of such structures
is added, currently void.

Signed-off-by: Eric Auger 
Acked-by: Baptiste Reynal 
Tested-by: Baptiste Reynal 
Signed-off-by: Alex Williamson

vfio: Split virqfd into a separate module for vfio bus drivers

2015-03-17T14:33:38+00:00

An unintended consequence of commit 42ac9bd18d4f ("vfio: initialize
the virqfd workqueue in VFIO generic code") is that the vfio module
is renamed to vfio_core so that it can include both vfio and virqfd.
That's a user visible change that may break module loading scritps
and it imposes eventfd support as a dependency on the core vfio code,
which it's really not.  virqfd is intended to be provided as a service
to vfio bus drivers, so instead of wrapping it into vfio.ko, we can
make it a stand-alone module toggled by vfio bus drivers.  This has
the additional benefit of removing initialization and exit from the
core vfio code.

Signed-off-by: Alex Williamson

vfio/platform: implement IRQ masking/unmasking via an eventfd

2015-03-16T20:08:55+00:00

With this patch the VFIO user will be able to set an eventfd that can be
used in order to mask and unmask IRQs of platform devices.

Signed-off-by: Antonios Motakis 
Signed-off-by: Baptiste Reynal 
Reviewed-by: Eric Auger 
Tested-by: Eric Auger 
Signed-off-by: Alex Williamson

vfio/platform: support for level sensitive interrupts

2015-03-16T20:08:50+00:00

Level sensitive interrupts are exposed as maskable and automasked
interrupts and are masked and disabled automatically when they fire.

Signed-off-by: Antonios Motakis 
[Baptiste Reynal: Move masked interrupt initialization from "vfio/platform:
trigger an interrupt via eventfd"]
Signed-off-by: Baptiste Reynal 
Reviewed-by: Eric Auger 
Tested-by: Eric Auger 
Signed-off-by: Alex Williamson

vfio/platform: trigger an interrupt via eventfd

2015-03-16T20:08:50+00:00

This patch allows to set an eventfd for a platform device's interrupt,
and also to trigger the interrupt eventfd from userspace for testing.
Level sensitive interrupts are marked as maskable and are handled in
a later patch. Edge triggered interrupts are not advertised as maskable
and are implemented here using a simple and efficient IRQ handler.

Signed-off-by: Antonios Motakis 
[Baptiste Reynal: fix masked interrupt initialization]
Signed-off-by: Baptiste Reynal 
Reviewed-by: Eric Auger 
Tested-by: Eric Auger 
Signed-off-by: Alex Williamson

vfio/platform: initial interrupts support code

2015-03-16T20:08:49+00:00

This patch is a skeleton for the VFIO_DEVICE_SET_IRQS IOCTL, around which
most IRQ functionality is implemented in VFIO.

Signed-off-by: Antonios Motakis 
Signed-off-by: Baptiste Reynal 
Reviewed-by: Eric Auger 
Tested-by: Eric Auger 
Signed-off-by: Alex Williamson