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Date: Tue, 19 Jul 2016 15:52:45 +0800
From: Zhou Jie <zhoujie2011@...fujitsu.com>
To: <alex.williamson@...hat.com>
CC: <linux-kernel@...r.kernel.org>, <qemu-devel@...gnu.org>,
<izumi.taku@...fujitsu.com>, <fan.chen@...ystack.cn>,
Chen Fan <chen.fan.fnst@...fujitsu.com>
Subject: [PATCH v2 1/2] vfio : resume notifier
From: Chen Fan <chen.fan.fnst@...fujitsu.com>
---
drivers/vfio/pci/vfio_pci.c | 28 +++++++++++++++++++++++++++-
drivers/vfio/pci/vfio_pci_intrs.c | 18 ++++++++++++++++++
drivers/vfio/pci/vfio_pci_private.h | 1 +
include/uapi/linux/vfio.h | 1 +
4 files changed, 47 insertions(+), 1 deletion(-)
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index 188b1ff..2d12b03 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -363,7 +363,8 @@ static int vfio_pci_get_irq_count(struct vfio_pci_device *vdev, int irq_type)
return (flags & PCI_MSIX_FLAGS_QSIZE) + 1;
}
- } else if (irq_type == VFIO_PCI_ERR_IRQ_INDEX) {
+ } else if (irq_type == VFIO_PCI_ERR_IRQ_INDEX ||
+ irq_type == VFIO_PCI_RESUME_IRQ_INDEX) {
if (pci_is_pcie(vdev->pdev))
return 1;
} else if (irq_type == VFIO_PCI_REQ_IRQ_INDEX) {
@@ -731,6 +732,7 @@ static long vfio_pci_ioctl(void *device_data,
case VFIO_PCI_REQ_IRQ_INDEX:
break;
case VFIO_PCI_ERR_IRQ_INDEX:
+ case VFIO_PCI_RESUME_IRQ_INDEX:
if (pci_is_pcie(vdev->pdev))
break;
/* pass thru to return error */
@@ -1234,8 +1236,32 @@ static pci_ers_result_t vfio_pci_aer_err_detected(struct pci_dev *pdev,
return PCI_ERS_RESULT_CAN_RECOVER;
}
+static void vfio_pci_aer_resume(struct pci_dev *pdev)
+{
+ struct vfio_pci_device *vdev;
+ struct vfio_device *device;
+
+ device = vfio_device_get_from_dev(&pdev->dev);
+ if (device == NULL)
+ return;
+
+ vdev = vfio_device_data(device);
+ if (vdev == NULL) {
+ vfio_device_put(device);
+ return;
+ }
+
+ mutex_lock(&vdev->igate);
+ if (vdev->resume_trigger)
+ eventfd_signal(vdev->resume_trigger, 1);
+
+ mutex_unlock(&vdev->igate);
+ vfio_device_put(device);
+}
+
static const struct pci_error_handlers vfio_err_handlers = {
.error_detected = vfio_pci_aer_err_detected,
+ .resume = vfio_pci_aer_resume,
};
static struct pci_driver vfio_pci_driver = {
diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c
index 15ecfc9..3a01a62 100644
--- a/drivers/vfio/pci/vfio_pci_intrs.c
+++ b/drivers/vfio/pci/vfio_pci_intrs.c
@@ -617,6 +617,16 @@ static int vfio_pci_set_err_trigger(struct vfio_pci_device *vdev,
return vfio_pci_set_ctx_trigger_single(&vdev->err_trigger, flags, data);
}
+static int vfio_pci_set_resume_trigger(struct vfio_pci_device *vdev,
+ unsigned index, unsigned start,
+ unsigned count, uint32_t flags, void *data)
+{
+ if (index != VFIO_PCI_RESUME_IRQ_INDEX)
+ return -EINVAL;
+
+ return vfio_pci_set_ctx_trigger_single(&vdev->resume_trigger, flags, data);
+}
+
static int vfio_pci_set_req_trigger(struct vfio_pci_device *vdev,
unsigned index, unsigned start,
unsigned count, uint32_t flags, void *data)
@@ -676,6 +686,14 @@ int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev, uint32_t flags,
break;
}
break;
+ case VFIO_PCI_RESUME_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_resume_trigger;
+ break;
+ }
+ break;
}
if (!func)
diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h
index 016c14a..80d4ddd 100644
--- a/drivers/vfio/pci/vfio_pci_private.h
+++ b/drivers/vfio/pci/vfio_pci_private.h
@@ -88,6 +88,7 @@ struct vfio_pci_device {
int refcnt;
struct eventfd_ctx *err_trigger;
struct eventfd_ctx *req_trigger;
+ struct eventfd_ctx *resume_trigger;
};
#define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX)
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 255a211..34ab138 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -433,6 +433,7 @@ enum {
VFIO_PCI_MSIX_IRQ_INDEX,
VFIO_PCI_ERR_IRQ_INDEX,
VFIO_PCI_REQ_IRQ_INDEX,
+ VFIO_PCI_RESUME_IRQ_INDEX,
VFIO_PCI_NUM_IRQS
};
--
1.8.3.1
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