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virtio: add clear_feature hook. 

Change-Id: I282ffc65a7bd692145626ab4272c5df4a792e9d4
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2383
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
This commit is contained in:
Jérôme Duval 2020-03-18 10:05:50 +01:00 committed by waddlesplash
parent 58b3e18891
commit d8e1fd6eda
4 changed files with 22 additions and 0 deletions
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2
headers/private/virtio/virtio.h
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@ -101,6 +101,8 @@ typedef struct {
status_t (*negotiate_features)(virtio_device cookie, uint32 supported,
uint32* negotiated, const char* (*get_feature_name)(uint32));
status_t (*clear_feature)(virtio_device cookie, uint32 feature);
status_t (*read_device_config)(virtio_device cookie, uint8 offset,
void* buffer, size_t bufferSize);
status_t (*write_device_config)(virtio_device cookie, uint8 offset,

8
src/add-ons/kernel/bus_managers/virtio/VirtioDevice.cpp
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@ -126,6 +126,14 @@ VirtioDevice::NegotiateFeatures(uint32 supported, uint32* negotiated,
}
status_t
VirtioDevice::ClearFeature(uint32 feature)
{
fFeatures &= ~feature;
return fController->write_guest_features(fCookie, fFeatures);
}
status_t
VirtioDevice::ReadDeviceConfig(uint8 offset, void* buffer, size_t bufferSize)
{

11
src/add-ons/kernel/bus_managers/virtio/VirtioModule.cpp
View File

@ -63,6 +63,16 @@ virtio_negotiate_features(void* _device, uint32 supported,
}
status_t
virtio_clear_feature(void* _device, uint32 feature)
{
CALLED();
VirtioDevice *device = (VirtioDevice *)_device;
return device->ClearFeature(feature);
}
status_t
virtio_read_device_config(void* _device, uint8 offset, void* buffer,
size_t bufferSize)
@ -275,6 +285,7 @@ virtio_device_interface virtio_device_module = {
},
virtio_negotiate_features,
virtio_clear_feature,
virtio_read_device_config,
virtio_write_device_config,
virtio_alloc_queues,

1
src/add-ons/kernel/bus_managers/virtio/VirtioPrivate.h
View File

@ -48,6 +48,7 @@ public:
status_t NegotiateFeatures(uint32 supported,
uint32* negotiated,
const char* (*get_feature_name)(uint32));
status_t ClearFeature(uint32 feature);
status_t ReadDeviceConfig(uint8 offset, void* buffer,
size_t bufferSize);