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drm/i915/gvt: introudce intel_vgpu_reset_resource() to reset vgpu resource state

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This patch introudces a new function intel_vgpu_reset_resource() to
reset allocated vgpu resources by intel_vgpu_alloc_resource(). So far
we only need clear the fence registers. The function _clear_vgpu_fence()
will reset both virtual and physical fence registers to 0.

Signed-off-by: Changbin Du <changbin.du@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Changbin Du 2017-01-13 11:15:56 +08:00 committed by Zhenyu Wang
parent 9631739f81
commit d22a48bf73
2 changed files with 28 additions and 2 deletions
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29
drivers/gpu/drm/i915/gvt/aperture_gm.c
View File

@ -158,6 +158,14 @@ void intel_vgpu_write_fence(struct intel_vgpu *vgpu,
POSTING_READ(fence_reg_lo); POSTING_READ(fence_reg_lo);
} }
static void _clear_vgpu_fence(struct intel_vgpu *vgpu)
{
int i;
for (i = 0; i < vgpu_fence_sz(vgpu); i++)
intel_vgpu_write_fence(vgpu, i, 0);
}
static void free_vgpu_fence(struct intel_vgpu *vgpu) static void free_vgpu_fence(struct intel_vgpu *vgpu)
{ {
struct intel_gvt *gvt = vgpu->gvt; struct intel_gvt *gvt = vgpu->gvt;
@ -171,9 +179,9 @@ static void free_vgpu_fence(struct intel_vgpu *vgpu)
intel_runtime_pm_get(dev_priv); intel_runtime_pm_get(dev_priv);
mutex_lock(&dev_priv->drm.struct_mutex); mutex_lock(&dev_priv->drm.struct_mutex);
_clear_vgpu_fence(vgpu);
for (i = 0; i < vgpu_fence_sz(vgpu); i++) { for (i = 0; i < vgpu_fence_sz(vgpu); i++) {
reg = vgpu->fence.regs[i]; reg = vgpu->fence.regs[i];
intel_vgpu_write_fence(vgpu, i, 0);
list_add_tail(&reg->link, list_add_tail(&reg->link,
&dev_priv->mm.fence_list); &dev_priv->mm.fence_list);
} }
@ -201,13 +209,14 @@ static int alloc_vgpu_fence(struct intel_vgpu *vgpu)
continue; continue;
list_del(pos); list_del(pos);
vgpu->fence.regs[i] = reg; vgpu->fence.regs[i] = reg;
intel_vgpu_write_fence(vgpu, i, 0);
if (++i == vgpu_fence_sz(vgpu)) if (++i == vgpu_fence_sz(vgpu))
break; break;
} }
if (i != vgpu_fence_sz(vgpu)) if (i != vgpu_fence_sz(vgpu))
goto out_free_fence; goto out_free_fence;
_clear_vgpu_fence(vgpu);
mutex_unlock(&dev_priv->drm.struct_mutex); mutex_unlock(&dev_priv->drm.struct_mutex);
intel_runtime_pm_put(dev_priv); intel_runtime_pm_put(dev_priv);
return 0; return 0;
@ -306,6 +315,22 @@ void intel_vgpu_free_resource(struct intel_vgpu *vgpu)
free_resource(vgpu); free_resource(vgpu);
} }
/**
* intel_vgpu_reset_resource - reset resource state owned by a vGPU
* @vgpu: a vGPU
*
* This function is used to reset resource state owned by a vGPU.
*
*/
void intel_vgpu_reset_resource(struct intel_vgpu *vgpu)
{
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
intel_runtime_pm_get(dev_priv);
_clear_vgpu_fence(vgpu);
intel_runtime_pm_put(dev_priv);
}
/** /**
* intel_alloc_vgpu_resource - allocate HW resource for a vGPU * intel_alloc_vgpu_resource - allocate HW resource for a vGPU
* @vgpu: vGPU * @vgpu: vGPU

1
drivers/gpu/drm/i915/gvt/gvt.h
View File

@ -323,6 +323,7 @@ struct intel_vgpu_creation_params {
int intel_vgpu_alloc_resource(struct intel_vgpu *vgpu, int intel_vgpu_alloc_resource(struct intel_vgpu *vgpu,
struct intel_vgpu_creation_params *param); struct intel_vgpu_creation_params *param);
void intel_vgpu_reset_resource(struct intel_vgpu *vgpu);
void intel_vgpu_free_resource(struct intel_vgpu *vgpu); void intel_vgpu_free_resource(struct intel_vgpu *vgpu);
void intel_vgpu_write_fence(struct intel_vgpu *vgpu, void intel_vgpu_write_fence(struct intel_vgpu *vgpu,
u32 fence, u64 value); u32 fence, u64 value);