linux-toradex.git/drivers/vfio/platform/vfio_platform_private.h, branch v4.4.7

vfio: platform: add dev_info on device reset

2015-11-03T19:55:05+00:00

It might be helpful for the end-user to check the device reset
function was found by the vfio platform reset framework.

Lets store a pointer to the struct device in vfio_platform_device
and trace when the reset function is called or not found.

Signed-off-by: Eric Auger 
Signed-off-by: Alex Williamson

vfio: platform: use list of registered reset function

2015-11-03T19:55:03+00:00

Remove the static lookup table and use the dynamic list of registered
reset functions instead. Also load the reset module through its alias.
The reset struct module pointer is stored in vfio_platform_device.

We also remove the useless struct device pointer parameter in
vfio_platform_get_reset.

This patch fixes the issue related to the usage of __symbol_get, which
besides from being moot, prevented compilation with CONFIG_MODULES
disabled.

Also usage of MODULE_ALIAS makes possible to add a new reset module
without needing to update the framework. This was suggested by Arnd.

Signed-off-by: Eric Auger 
Reported-by: Arnd Bergmann 
Reviewed-by: Arnd Bergmann 
Signed-off-by: Alex Williamson

vfio: platform: add compat in vfio_platform_device

2015-11-03T19:55:02+00:00

Let's retrieve the compatibility string on probe and store it
in the vfio_platform_device struct

Signed-off-by: Eric Auger 
Signed-off-by: Alex Williamson

vfio: platform: introduce module_vfio_reset_handler macro

2015-11-03T19:54:59+00:00

The module_vfio_reset_handler macro
- define a module alias
- implement module init/exit function which respectively registers
  and unregisters the reset function.

Signed-off-by: Eric Auger 
Reviewed-by: Arnd Bergmann 
Signed-off-by: Alex Williamson

vfio: platform: add capability to register a reset function

2015-11-03T19:54:57+00:00

In preparation for subsequent changes in reset function lookup,
lets introduce a dynamic list of reset combos (compat string,
reset module, reset function). The list can be populated/voided with
vfio_platform_register/unregister_reset. Those are not yet used in
this patch.

Signed-off-by: Eric Auger 
Reviewed-by: Arnd Bergmann 
Signed-off-by: Alex Williamson

vfio: platform: introduce vfio-platform-base module

2015-11-03T19:54:56+00:00

To prepare for vfio platform reset rework let's build
vfio_platform_common.c and vfio_platform_irq.c in a separate
module from vfio-platform and vfio-amba. This makes possible
to have separate module inits and works around a race between
platform driver init and vfio reset module init: that way we
make sure symbols exported by base are available when vfio-platform
driver gets probed.

The open/release being implemented in the base module, the ref
count is applied to the parent module instead.

Signed-off-by: Eric Auger 
Suggested-by: Arnd Bergmann 
Reviewed-by: Arnd Bergmann 
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/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