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

diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index cee7376ba39d00f8ef577454f3ef3be2abbbf68f..eee530453aa6772d94ea095dfe46bce3db8c7256 100644 (file)
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -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);