From: Jason Gunthorpe <jgg@nvidia.com>
To: Alexander Gordeev <agordeev@linux.ibm.com>,
David Airlie <airlied@linux.ie>,
Alex Williamson <alex.williamson@redhat.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Cornelia Huck <cohuck@redhat.com>,
Jonathan Corbet <corbet@lwn.net>, Daniel Vetter <daniel@ffwll.ch>,
dri-devel@lists.freedesktop.org,
Harald Freudenberger <freude@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Heiko Carstens <hca@linux.ibm.com>,
intel-gfx@lists.freedesktop.org,
intel-gvt-dev@lists.freedesktop.org,
Jani Nikula <jani.nikula@linux.intel.com>,
Jason Herne <jjherne@linux.ibm.com>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
kvm@vger.kernel.org, Kirti Wankhede <kwankhede@nvidia.com>,
linux-doc@vger.kernel.org, linux-s390@vger.kernel.org,
Matthew Rosato <mjrosato@linux.ibm.com>,
Peter Oberparleiter <oberpar@linux.ibm.com>,
Halil Pasic <pasic@linux.ibm.com>,
Rodrigo Vivi <rodrigo.vivi@intel.com>,
Sven Schnelle <svens@linux.ibm.com>,
Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
Vineeth Vijayan <vneethv@linux.ibm.com>,
Zhenyu Wang <zhenyuw@linux.intel.com>,
Zhi Wang <zhi.a.wang@intel.com>
Cc: Tony Krowiak <akrowiak@linux.ibm.com>,
Eric Farman <farman@linux.ibm.com>,
Christoph Hellwig <hch@lst.de>, Kevin Tian <kevin.tian@intel.com>,
"Liu, Yi L" <yi.l.liu@intel.com>
Subject: [PATCH v4 1/7] vfio: Make vfio_(un)register_notifier accept a vfio_device
Date: Thu, 5 May 2022 21:08:39 -0300 [thread overview]
Message-ID: <1-v4-8045e76bf00b+13d-vfio_mdev_no_group_jgg@nvidia.com> (raw)
In-Reply-To: <0-v4-8045e76bf00b+13d-vfio_mdev_no_group_jgg@nvidia.com>
All callers have a struct vfio_device trivially available, pass it in
directly and avoid calling the expensive vfio_group_get_from_dev().
Acked-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
drivers/gpu/drm/i915/gvt/kvmgt.c | 24 ++++++++++++------------
drivers/s390/cio/vfio_ccw_ops.c | 7 +++----
drivers/s390/crypto/vfio_ap_ops.c | 14 +++++++-------
drivers/vfio/vfio.c | 28 +++++++++-------------------
include/linux/vfio.h | 4 ++--
5 files changed, 33 insertions(+), 44 deletions(-)
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index 0787ba5c301f5e..1cec4f1fdfaced 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -810,8 +810,8 @@ static int intel_vgpu_open_device(struct vfio_device *vfio_dev)
vgpu->group_notifier.notifier_call = intel_vgpu_group_notifier;
events = VFIO_IOMMU_NOTIFY_DMA_UNMAP;
- ret = vfio_register_notifier(vfio_dev->dev, VFIO_IOMMU_NOTIFY, &events,
- &vgpu->iommu_notifier);
+ ret = vfio_register_notifier(vfio_dev, VFIO_IOMMU_NOTIFY, &events,
+ &vgpu->iommu_notifier);
if (ret != 0) {
gvt_vgpu_err("vfio_register_notifier for iommu failed: %d\n",
ret);
@@ -819,8 +819,8 @@ static int intel_vgpu_open_device(struct vfio_device *vfio_dev)
}
events = VFIO_GROUP_NOTIFY_SET_KVM;
- ret = vfio_register_notifier(vfio_dev->dev, VFIO_GROUP_NOTIFY, &events,
- &vgpu->group_notifier);
+ ret = vfio_register_notifier(vfio_dev, VFIO_GROUP_NOTIFY, &events,
+ &vgpu->group_notifier);
if (ret != 0) {
gvt_vgpu_err("vfio_register_notifier for group failed: %d\n",
ret);
@@ -873,12 +873,12 @@ static int intel_vgpu_open_device(struct vfio_device *vfio_dev)
vgpu->vfio_group = NULL;
undo_register:
- vfio_unregister_notifier(vfio_dev->dev, VFIO_GROUP_NOTIFY,
- &vgpu->group_notifier);
+ vfio_unregister_notifier(vfio_dev, VFIO_GROUP_NOTIFY,
+ &vgpu->group_notifier);
undo_iommu:
- vfio_unregister_notifier(vfio_dev->dev, VFIO_IOMMU_NOTIFY,
- &vgpu->iommu_notifier);
+ vfio_unregister_notifier(vfio_dev, VFIO_IOMMU_NOTIFY,
+ &vgpu->iommu_notifier);
out:
return ret;
}
@@ -907,13 +907,13 @@ static void __intel_vgpu_release(struct intel_vgpu *vgpu)
intel_gvt_release_vgpu(vgpu);
- ret = vfio_unregister_notifier(vgpu->vfio_device.dev, VFIO_IOMMU_NOTIFY,
- &vgpu->iommu_notifier);
+ ret = vfio_unregister_notifier(&vgpu->vfio_device, VFIO_IOMMU_NOTIFY,
+ &vgpu->iommu_notifier);
drm_WARN(&i915->drm, ret,
"vfio_unregister_notifier for iommu failed: %d\n", ret);
- ret = vfio_unregister_notifier(vgpu->vfio_device.dev, VFIO_GROUP_NOTIFY,
- &vgpu->group_notifier);
+ ret = vfio_unregister_notifier(&vgpu->vfio_device, VFIO_GROUP_NOTIFY,
+ &vgpu->group_notifier);
drm_WARN(&i915->drm, ret,
"vfio_unregister_notifier for group failed: %d\n", ret);
diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c
index c4d60cdbf247bf..b49e2e9db2dc6f 100644
--- a/drivers/s390/cio/vfio_ccw_ops.c
+++ b/drivers/s390/cio/vfio_ccw_ops.c
@@ -183,7 +183,7 @@ static int vfio_ccw_mdev_open_device(struct vfio_device *vdev)
private->nb.notifier_call = vfio_ccw_mdev_notifier;
- ret = vfio_register_notifier(vdev->dev, VFIO_IOMMU_NOTIFY,
+ ret = vfio_register_notifier(vdev, VFIO_IOMMU_NOTIFY,
&events, &private->nb);
if (ret)
return ret;
@@ -204,8 +204,7 @@ static int vfio_ccw_mdev_open_device(struct vfio_device *vdev)
out_unregister:
vfio_ccw_unregister_dev_regions(private);
- vfio_unregister_notifier(vdev->dev, VFIO_IOMMU_NOTIFY,
- &private->nb);
+ vfio_unregister_notifier(vdev, VFIO_IOMMU_NOTIFY, &private->nb);
return ret;
}
@@ -223,7 +222,7 @@ static void vfio_ccw_mdev_close_device(struct vfio_device *vdev)
cp_free(&private->cp);
vfio_ccw_unregister_dev_regions(private);
- vfio_unregister_notifier(vdev->dev, VFIO_IOMMU_NOTIFY, &private->nb);
+ vfio_unregister_notifier(vdev, VFIO_IOMMU_NOTIFY, &private->nb);
}
static ssize_t vfio_ccw_mdev_read_io_region(struct vfio_ccw_private *private,
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
index ee0a3bf8f476ca..bfa7ee6ef532d9 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -1406,21 +1406,21 @@ static int vfio_ap_mdev_open_device(struct vfio_device *vdev)
matrix_mdev->group_notifier.notifier_call = vfio_ap_mdev_group_notifier;
events = VFIO_GROUP_NOTIFY_SET_KVM;
- ret = vfio_register_notifier(vdev->dev, VFIO_GROUP_NOTIFY,
- &events, &matrix_mdev->group_notifier);
+ ret = vfio_register_notifier(vdev, VFIO_GROUP_NOTIFY, &events,
+ &matrix_mdev->group_notifier);
if (ret)
return ret;
matrix_mdev->iommu_notifier.notifier_call = vfio_ap_mdev_iommu_notifier;
events = VFIO_IOMMU_NOTIFY_DMA_UNMAP;
- ret = vfio_register_notifier(vdev->dev, VFIO_IOMMU_NOTIFY,
- &events, &matrix_mdev->iommu_notifier);
+ ret = vfio_register_notifier(vdev, VFIO_IOMMU_NOTIFY, &events,
+ &matrix_mdev->iommu_notifier);
if (ret)
goto out_unregister_group;
return 0;
out_unregister_group:
- vfio_unregister_notifier(vdev->dev, VFIO_GROUP_NOTIFY,
+ vfio_unregister_notifier(vdev, VFIO_GROUP_NOTIFY,
&matrix_mdev->group_notifier);
return ret;
}
@@ -1430,9 +1430,9 @@ static void vfio_ap_mdev_close_device(struct vfio_device *vdev)
struct ap_matrix_mdev *matrix_mdev =
container_of(vdev, struct ap_matrix_mdev, vdev);
- vfio_unregister_notifier(vdev->dev, VFIO_IOMMU_NOTIFY,
+ vfio_unregister_notifier(vdev, VFIO_IOMMU_NOTIFY,
&matrix_mdev->iommu_notifier);
- vfio_unregister_notifier(vdev->dev, VFIO_GROUP_NOTIFY,
+ vfio_unregister_notifier(vdev, VFIO_GROUP_NOTIFY,
&matrix_mdev->group_notifier);
vfio_ap_mdev_unset_kvm(matrix_mdev);
}
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 0c766384cee0f8..d70890ab9cea92 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -2269,19 +2269,16 @@ static int vfio_unregister_group_notifier(struct vfio_group *group,
return ret;
}
-int vfio_register_notifier(struct device *dev, enum vfio_notify_type type,
- unsigned long *events, struct notifier_block *nb)
+int vfio_register_notifier(struct vfio_device *device,
+ enum vfio_notify_type type, unsigned long *events,
+ struct notifier_block *nb)
{
- struct vfio_group *group;
+ struct vfio_group *group = device->group;
int ret;
- if (!dev || !nb || !events || (*events == 0))
+ if (!nb || !events || (*events == 0))
return -EINVAL;
- group = vfio_group_get_from_dev(dev);
- if (!group)
- return -ENODEV;
-
switch (type) {
case VFIO_IOMMU_NOTIFY:
ret = vfio_register_iommu_notifier(group, events, nb);
@@ -2292,25 +2289,20 @@ int vfio_register_notifier(struct device *dev, enum vfio_notify_type type,
default:
ret = -EINVAL;
}
-
- vfio_group_put(group);
return ret;
}
EXPORT_SYMBOL(vfio_register_notifier);
-int vfio_unregister_notifier(struct device *dev, enum vfio_notify_type type,
+int vfio_unregister_notifier(struct vfio_device *device,
+ enum vfio_notify_type type,
struct notifier_block *nb)
{
- struct vfio_group *group;
+ struct vfio_group *group = device->group;
int ret;
- if (!dev || !nb)
+ if (!nb)
return -EINVAL;
- group = vfio_group_get_from_dev(dev);
- if (!group)
- return -ENODEV;
-
switch (type) {
case VFIO_IOMMU_NOTIFY:
ret = vfio_unregister_iommu_notifier(group, nb);
@@ -2321,8 +2313,6 @@ int vfio_unregister_notifier(struct device *dev, enum vfio_notify_type type,
default:
ret = -EINVAL;
}
-
- vfio_group_put(group);
return ret;
}
EXPORT_SYMBOL(vfio_unregister_notifier);
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 66dda06ec42d1b..a00fd722f044b0 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -178,11 +178,11 @@ enum vfio_notify_type {
/* events for VFIO_GROUP_NOTIFY */
#define VFIO_GROUP_NOTIFY_SET_KVM BIT(0)
-extern int vfio_register_notifier(struct device *dev,
+extern int vfio_register_notifier(struct vfio_device *device,
enum vfio_notify_type type,
unsigned long *required_events,
struct notifier_block *nb);
-extern int vfio_unregister_notifier(struct device *dev,
+extern int vfio_unregister_notifier(struct vfio_device *device,
enum vfio_notify_type type,
struct notifier_block *nb);
--
2.36.0
next prev parent reply other threads:[~2022-05-06 0:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-06 0:08 [PATCH v4 0/7] Make the rest of the VFIO driver interface use vfio_device Jason Gunthorpe
2022-05-06 0:08 ` Jason Gunthorpe [this message]
2022-05-06 0:08 ` [PATCH v4 2/7] vfio/ccw: Remove mdev from struct channel_program Jason Gunthorpe
2022-05-06 0:08 ` [PATCH v4 3/7] vfio/mdev: Pass in a struct vfio_device * to vfio_pin/unpin_pages() Jason Gunthorpe
2022-05-06 0:08 ` [PATCH v4 4/7] vfio/mdev: Pass in a struct vfio_device * to vfio_dma_rw() Jason Gunthorpe
2022-05-06 0:08 ` [PATCH v4 5/7] drm/i915/gvt: Change from vfio_group_(un)pin_pages to vfio_(un)pin_pages Jason Gunthorpe
2022-05-11 16:09 ` Wang, Zhi A
2022-05-06 0:08 ` [PATCH v4 6/7] vfio: Remove dead code Jason Gunthorpe
2022-05-06 0:08 ` [PATCH v4 7/7] vfio: Remove calls to vfio_group_add_container_user() Jason Gunthorpe
2022-05-12 18:21 ` [PATCH v4 0/7] Make the rest of the VFIO driver interface use vfio_device Alex Williamson
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