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[RFC,v1,1/5] vfio: Register/unregister irq_bypass_producer

Message ID 1436497207-4786-2-git-send-email-feng.wu@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Wu, Feng July 10, 2015, 3 a.m. UTC 
This patch adds the registration/unregistration of an
irq_bypass_producer for MSI/MSIx on vfio pci devices.

Signed-off-by: Feng Wu <feng.wu@intel.com>
---
 drivers/vfio/pci/vfio_pci_intrs.c   | 8 ++++++--
 drivers/vfio/pci/vfio_pci_private.h | 2 ++
 2 files changed, 8 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c
index 4e053be..6e86292 100644
--- a/drivers/vfio/pci/vfio_pci_intrs.c
+++ b/drivers/vfio/pci/vfio_pci_intrs.c
@@ -322,7 +322,7 @@  static int vfio_msi_set_vector_signal(struct vfio_pci_device *vdev,
 
 	if (vdev->ctx[vector].trigger) {
 		free_irq(irq, vdev->ctx[vector].trigger);
-		/* irq_bypass_unregister_producer(); */
+		irq_bypass_unregister_producer(&vdev->ctx[vector].producer);
 		kfree(vdev->ctx[vector].name);
 		eventfd_ctx_put(vdev->ctx[vector].trigger);
 		vdev->ctx[vector].trigger = NULL;
@@ -364,7 +364,11 @@  static int vfio_msi_set_vector_signal(struct vfio_pci_device *vdev,
 		return ret;
 	}
 
-	/* irq_bypass_register_producer(); */
+	INIT_LIST_HEAD(&vdev->ctx[vector].producer.node);
+	vdev->ctx[vector].producer.token = trigger;
+	vdev->ctx[vector].producer.irq = irq;
+	ret = irq_bypass_register_producer(&vdev->ctx[vector].producer);
+	WARN_ON(ret);
 
 	vdev->ctx[vector].trigger = trigger;
 
diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h
index ae0e1b4..0e7394f 100644
--- a/drivers/vfio/pci/vfio_pci_private.h
+++ b/drivers/vfio/pci/vfio_pci_private.h
@@ -13,6 +13,7 @@ 
 
 #include <linux/mutex.h>
 #include <linux/pci.h>
+#include <linux/irqbypass.h>
 
 #ifndef VFIO_PCI_PRIVATE_H
 #define VFIO_PCI_PRIVATE_H
@@ -29,6 +30,7 @@  struct vfio_pci_irq_ctx {
 	struct virqfd		*mask;
 	char			*name;
 	bool			masked;
+	struct irq_bypass_producer	producer;
 };
 
 struct vfio_pci_device {