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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-03 01:02:32 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-03 01:02:32 +0400
commit0b2e3b6bb4a415379f16e38fc92db42379be47a1 (patch)
treeac6af620793ecd5e4b1d5523e0f431d2d8a5ef66 /drivers/vfio/pci/vfio_pci_intrs.c
parente95893004104054d49406fd108fefa3ddc054366 (diff)
parent664e9386bd05dbdfecfb28d6cf2fde983aabc65c (diff)
downloadlinux-0b2e3b6bb4a415379f16e38fc92db42379be47a1.tar.xz
Merge tag 'vfio-for-v3.10' of git://github.com/awilliam/linux-vfio
Pull vfio updates from Alex Williamson: "Changes include extension to support PCI AER notification to userspace, byte granularity of PCI config space and access to unarchitected PCI config space, better protection around IOMMU driver accesses, default file mode fix, and a few misc cleanups." * tag 'vfio-for-v3.10' of git://github.com/awilliam/linux-vfio: vfio: Set container device mode vfio: Use down_reads to protect iommu disconnects vfio: Convert container->group_lock to rwsem PCI/VFIO: use pcie_flags_reg instead of access PCI-E Capabilities Register vfio-pci: Enable raw access to unassigned config space vfio-pci: Use byte granularity in config map vfio: make local function vfio_pci_intx_unmask_handler() static VFIO-AER: Vfio-pci driver changes for supporting AER VFIO: Wrapper for getting reference to vfio_device
Diffstat (limited to 'drivers/vfio/pci/vfio_pci_intrs.c')
-rw-r--r--drivers/vfio/pci/vfio_pci_intrs.c67
1 files changed, 66 insertions, 1 deletions
diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c
index a96509187deb..4bc704e1b7c7 100644
--- a/drivers/vfio/pci/vfio_pci_intrs.c
+++ b/drivers/vfio/pci/vfio_pci_intrs.c
@@ -287,7 +287,8 @@ 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.
*/
-int vfio_pci_intx_unmask_handler(struct vfio_pci_device *vdev, void *unused)
+static int vfio_pci_intx_unmask_handler(struct vfio_pci_device *vdev,
+ void *unused)
{
struct pci_dev *pdev = vdev->pdev;
unsigned long flags;
@@ -746,6 +747,63 @@ static int vfio_pci_set_msi_trigger(struct vfio_pci_device *vdev,
return 0;
}
+static int vfio_pci_set_err_trigger(struct vfio_pci_device *vdev,
+ unsigned index, unsigned start,
+ unsigned count, uint32_t flags, void *data)
+{
+ int32_t fd = *(int32_t *)data;
+ struct pci_dev *pdev = vdev->pdev;
+
+ if ((index != VFIO_PCI_ERR_IRQ_INDEX) ||
+ !(flags & VFIO_IRQ_SET_DATA_TYPE_MASK))
+ return -EINVAL;
+
+ /*
+ * device_lock synchronizes setting and checking of
+ * err_trigger. The vfio_pci_aer_err_detected() is also
+ * called with device_lock held.
+ */
+
+ /* DATA_NONE/DATA_BOOL enables loopback testing */
+
+ if (flags & VFIO_IRQ_SET_DATA_NONE) {
+ device_lock(&pdev->dev);
+ if (vdev->err_trigger)
+ eventfd_signal(vdev->err_trigger, 1);
+ device_unlock(&pdev->dev);
+ return 0;
+ } else if (flags & VFIO_IRQ_SET_DATA_BOOL) {
+ uint8_t trigger = *(uint8_t *)data;
+ device_lock(&pdev->dev);
+ if (trigger && vdev->err_trigger)
+ eventfd_signal(vdev->err_trigger, 1);
+ device_unlock(&pdev->dev);
+ return 0;
+ }
+
+ /* Handle SET_DATA_EVENTFD */
+
+ if (fd == -1) {
+ device_lock(&pdev->dev);
+ if (vdev->err_trigger)
+ eventfd_ctx_put(vdev->err_trigger);
+ vdev->err_trigger = NULL;
+ device_unlock(&pdev->dev);
+ return 0;
+ } else if (fd >= 0) {
+ struct eventfd_ctx *efdctx;
+ efdctx = eventfd_ctx_fdget(fd);
+ if (IS_ERR(efdctx))
+ return PTR_ERR(efdctx);
+ device_lock(&pdev->dev);
+ if (vdev->err_trigger)
+ eventfd_ctx_put(vdev->err_trigger);
+ vdev->err_trigger = efdctx;
+ device_unlock(&pdev->dev);
+ return 0;
+ } else
+ return -EINVAL;
+}
int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev, uint32_t flags,
unsigned index, unsigned start, unsigned count,
void *data)
@@ -780,6 +838,13 @@ int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev, uint32_t flags,
break;
}
break;
+ case VFIO_PCI_ERR_IRQ_INDEX:
+ switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) {
+ case VFIO_IRQ_SET_ACTION_TRIGGER:
+ if (pci_is_pcie(vdev->pdev))
+ func = vfio_pci_set_err_trigger;
+ break;
+ }
}
if (!func)