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drm/i915/gvt: clear the vGPU reset logic

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Releasing shadow PPGTT pages is not enough when vGPU reset, the
guest page table tracking data should has same life-cycle with
all the shadow PPGTT pages; Otherwise there is no chance to
re-shadow the PPGTT pages without free the guest page table
tracking data.

This patch clear the PPGTT reset logic and make the vGPU reset in
working order.

v2: refactor some logic to avoid code duplicated.
v3: remove useless macro and add comments from Christophe.
v4: keep reset logic in reset function.

Signed-off-by: Ping Gao <ping.a.gao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Ping Gao 2017-02-21 15:52:56 +08:00 committed by Zhenyu Wang
parent bab0593043
commit da9cc8de22
1 changed files with 25 additions and 10 deletions
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35
drivers/gpu/drm/i915/gvt/gtt.c
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@ -2015,6 +2015,22 @@ int intel_vgpu_init_gtt(struct intel_vgpu *vgpu)
return create_scratch_page_tree(vgpu);
}
static void intel_vgpu_free_mm(struct intel_vgpu *vgpu, int type)
{
struct list_head *pos, *n;
struct intel_vgpu_mm *mm;
list_for_each_safe(pos, n, &vgpu->gtt.mm_list_head) {
mm = container_of(pos, struct intel_vgpu_mm, list);
if (mm->type == type) {
vgpu->gvt->gtt.mm_free_page_table(mm);
list_del(&mm->list);
list_del(&mm->lru_list);
kfree(mm);
}
}
}
/**
* intel_vgpu_clean_gtt - clean up per-vGPU graphics memory virulization
* @vgpu: a vGPU
@ -2027,19 +2043,11 @@ int intel_vgpu_init_gtt(struct intel_vgpu *vgpu)
*/
void intel_vgpu_clean_gtt(struct intel_vgpu *vgpu)
{
struct list_head *pos, *n;
struct intel_vgpu_mm *mm;
ppgtt_free_all_shadow_page(vgpu);
release_scratch_page_tree(vgpu);
list_for_each_safe(pos, n, &vgpu->gtt.mm_list_head) {
mm = container_of(pos, struct intel_vgpu_mm, list);
vgpu->gvt->gtt.mm_free_page_table(mm);
list_del(&mm->list);
list_del(&mm->lru_list);
kfree(mm);
}
intel_vgpu_free_mm(vgpu, INTEL_GVT_MM_PPGTT);
intel_vgpu_free_mm(vgpu, INTEL_GVT_MM_GGTT);
}
static void clean_spt_oos(struct intel_gvt *gvt)
@ -2322,6 +2330,13 @@ void intel_vgpu_reset_gtt(struct intel_vgpu *vgpu, bool dmlr)
int i;
ppgtt_free_all_shadow_page(vgpu);
/* Shadow pages are only created when there is no page
* table tracking data, so remove page tracking data after
* removing the shadow pages.
*/
intel_vgpu_free_mm(vgpu, INTEL_GVT_MM_PPGTT);
if (!dmlr)
return;