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drm/i915/gvt: switch to user vfio_group_pin/upin_pages 

substitute vfio_pin_pages() and vfio_unpin_pages() with
vfio_group_pin_pages() and vfio_group_unpin_pages(), so that
it will not go through looking up, checking, referencing,
dereferencing of VFIO group in each call.

Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200313031151.8042-1-yan.y.zhao@intel.com
This commit is contained in:
Yan Zhao 2020-03-12 23:11:51 -04:00 committed by Zhenyu Wang
parent b59b2a3ee5
commit ec7301d514
1 changed files with 5 additions and 3 deletions
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8
drivers/gpu/drm/i915/gvt/kvmgt.c
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@ -152,6 +152,7 @@ static void gvt_unpin_guest_page(struct intel_vgpu *vgpu, unsigned long gfn,
unsigned long size)
{
struct drm_i915_private *i915 = vgpu->gvt->gt->i915;
struct kvmgt_vdev *vdev = kvmgt_vdev(vgpu);
int total_pages;
int npage;
int ret;
@ -161,7 +162,7 @@ static void gvt_unpin_guest_page(struct intel_vgpu *vgpu, unsigned long gfn,
for (npage = 0; npage < total_pages; npage++) {
unsigned long cur_gfn = gfn + npage;
ret = vfio_unpin_pages(mdev_dev(kvmgt_vdev(vgpu)->mdev), &cur_gfn, 1);
ret = vfio_group_unpin_pages(vdev->vfio_group, &cur_gfn, 1);
drm_WARN_ON(&i915->drm, ret != 1);
}
}
@ -170,6 +171,7 @@ static void gvt_unpin_guest_page(struct intel_vgpu *vgpu, unsigned long gfn,
static int gvt_pin_guest_page(struct intel_vgpu *vgpu, unsigned long gfn,
unsigned long size, struct page **page)
{
struct kvmgt_vdev *vdev = kvmgt_vdev(vgpu);
unsigned long base_pfn = 0;
int total_pages;
int npage;
@ -184,8 +186,8 @@ static int gvt_pin_guest_page(struct intel_vgpu *vgpu, unsigned long gfn,
unsigned long cur_gfn = gfn + npage;
unsigned long pfn;
ret = vfio_pin_pages(mdev_dev(kvmgt_vdev(vgpu)->mdev), &cur_gfn, 1,
IOMMU_READ | IOMMU_WRITE, &pfn);
ret = vfio_group_pin_pages(vdev->vfio_group, &cur_gfn, 1,
IOMMU_READ | IOMMU_WRITE, &pfn);
if (ret != 1) {
gvt_vgpu_err("vfio_pin_pages failed for gfn 0x%lx, ret %d\n",
cur_gfn, ret);