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authorAntonios Motakis <a.motakis@virtualopensystems.com>2015-03-16 23:08:53 +0300
committerAlex Williamson <alex.williamson@redhat.com>2015-03-16 23:08:53 +0300
commit09bbcb8810c4673cb96477e0e83c9bcdfadc7741 (patch)
tree73ad0b7630c6287f949b803089fb162973c8c13e /drivers/vfio
parent9269c393e7a971f98c0f54d7fc350ac7636d1fa5 (diff)
downloadlinux-09bbcb8810c4673cb96477e0e83c9bcdfadc7741.tar.xz
vfio: pass an opaque pointer on virqfd initialization
VFIO_PCI passes the VFIO device structure *vdev via eventfd to the handler that implements masking/unmasking of IRQs via an eventfd. We can replace it in the virqfd infrastructure with an opaque type so we can make use of the mechanism from other VFIO bus drivers. Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com> Signed-off-by: Baptiste Reynal <b.reynal@virtualopensystems.com> Reviewed-by: Eric Auger <eric.auger@linaro.org> Tested-by: Eric Auger <eric.auger@linaro.org> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio')
-rw-r--r--drivers/vfio/pci/vfio_pci_intrs.c30
1 files changed, 16 insertions, 14 deletions
diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c
index de069796b2fd..c84a129cc527 100644
--- a/drivers/vfio/pci/vfio_pci_intrs.c
+++ b/drivers/vfio/pci/vfio_pci_intrs.c
@@ -31,10 +31,10 @@
* IRQfd - generic
*/
struct virqfd {
- struct vfio_pci_device *vdev;
+ void *opaque;
struct eventfd_ctx *eventfd;
- int (*handler)(struct vfio_pci_device *, void *);
- void (*thread)(struct vfio_pci_device *, void *);
+ int (*handler)(void *, void *);
+ void (*thread)(void *, void *);
void *data;
struct work_struct inject;
wait_queue_t wait;
@@ -74,7 +74,7 @@ static int virqfd_wakeup(wait_queue_t *wait, unsigned mode, int sync, void *key)
if (flags & POLLIN) {
/* An event has been signaled, call function */
if ((!virqfd->handler ||
- virqfd->handler(virqfd->vdev, virqfd->data)) &&
+ virqfd->handler(virqfd->opaque, virqfd->data)) &&
virqfd->thread)
schedule_work(&virqfd->inject);
}
@@ -124,12 +124,12 @@ static void virqfd_inject(struct work_struct *work)
{
struct virqfd *virqfd = container_of(work, struct virqfd, inject);
if (virqfd->thread)
- virqfd->thread(virqfd->vdev, virqfd->data);
+ virqfd->thread(virqfd->opaque, virqfd->data);
}
-int vfio_virqfd_enable(struct vfio_pci_device *vdev,
- int (*handler)(struct vfio_pci_device *, void *),
- void (*thread)(struct vfio_pci_device *, void *),
+int vfio_virqfd_enable(void *opaque,
+ int (*handler)(void *, void *),
+ void (*thread)(void *, void *),
void *data, struct virqfd **pvirqfd, int fd)
{
struct fd irqfd;
@@ -143,7 +143,7 @@ int vfio_virqfd_enable(struct vfio_pci_device *vdev,
return -ENOMEM;
virqfd->pvirqfd = pvirqfd;
- virqfd->vdev = vdev;
+ virqfd->opaque = opaque;
virqfd->handler = handler;
virqfd->thread = thread;
virqfd->data = data;
@@ -196,7 +196,7 @@ int vfio_virqfd_enable(struct vfio_pci_device *vdev,
* before we registered and trigger it as if we didn't miss it.
*/
if (events & POLLIN) {
- if ((!handler || handler(vdev, data)) && thread)
+ if ((!handler || handler(opaque, data)) && thread)
schedule_work(&virqfd->inject);
}
@@ -243,8 +243,10 @@ EXPORT_SYMBOL_GPL(vfio_virqfd_disable);
/*
* INTx
*/
-static void vfio_send_intx_eventfd(struct vfio_pci_device *vdev, void *unused)
+static void vfio_send_intx_eventfd(void *opaque, void *unused)
{
+ struct vfio_pci_device *vdev = opaque;
+
if (likely(is_intx(vdev) && !vdev->virq_disabled))
eventfd_signal(vdev->ctx[0].trigger, 1);
}
@@ -287,9 +289,9 @@ void vfio_pci_intx_mask(struct vfio_pci_device *vdev)
* a signal is necessary, which can then be handled via a work queue
* or directly depending on the caller.
*/
-static int vfio_pci_intx_unmask_handler(struct vfio_pci_device *vdev,
- void *unused)
+static int vfio_pci_intx_unmask_handler(void *opaque, void *unused)
{
+ struct vfio_pci_device *vdev = opaque;
struct pci_dev *pdev = vdev->pdev;
unsigned long flags;
int ret = 0;
@@ -641,7 +643,7 @@ static int vfio_pci_set_intx_unmask(struct vfio_pci_device *vdev,
} else if (flags & VFIO_IRQ_SET_DATA_EVENTFD) {
int32_t fd = *(int32_t *)data;
if (fd >= 0)
- return vfio_virqfd_enable(vdev,
+ return vfio_virqfd_enable((void *) vdev,
vfio_pci_intx_unmask_handler,
vfio_send_intx_eventfd, NULL,
&vdev->ctx[0].unmask, fd);