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drm/i915/gvt: Handle orphan dmabuf_objs

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dmabuf_obj's destruction relys on GEM release operation, which is managed
in i915 driver. And there is a time window between vgpu's destruction and
its dmabuf_objs' destruction. This patch is to free the orphan dmabuf_objs
correctly after the vgpu passes away.

Signed-off-by: Tina Zhang <tina.zhang@intel.com>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Tina Zhang 2017-11-23 16:26:37 +08:00 committed by Zhenyu Wang
parent e546e281d3
commit dfb6ae4e14
1 changed files with 35 additions and 21 deletions
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36
drivers/gpu/drm/i915/gvt/dmabuf.c
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@ -88,20 +88,27 @@ static void dmabuf_gem_object_free(struct kref *kref)
container_of(kref, struct intel_vgpu_dmabuf_obj, kref);
struct intel_vgpu *vgpu = obj->vgpu;
struct list_head *pos;
struct intel_vgpu_dmabuf_obj *dmabuf_obj;
if (vgpu) {
list_for_each(pos, &vgpu->dmabuf_obj_list_head) {
dmabuf_obj = container_of(pos, struct intel_vgpu_dmabuf_obj,
list);
dmabuf_obj = container_of(pos,
struct intel_vgpu_dmabuf_obj, list);
if (dmabuf_obj == obj) {
idr_remove(&vgpu->object_idr, dmabuf_obj->dmabuf_id);
intel_gvt_hypervisor_put_vfio_device(vgpu);
idr_remove(&vgpu->object_idr,
dmabuf_obj->dmabuf_id);
kfree(dmabuf_obj->info);
kfree(dmabuf_obj);
list_del(pos);
break;
}
}
} else {
/* Free the orphan dmabuf_objs here */
kfree(obj->info);
kfree(obj);
}
}
@ -122,11 +129,16 @@ static void vgpu_gem_release(struct drm_i915_gem_object *gem_obj)
struct intel_vgpu_dmabuf_obj *obj = fb_info->obj;
struct intel_vgpu *vgpu = obj->vgpu;
if (vgpu) {
mutex_lock(&vgpu->dmabuf_lock);
gem_obj->base.dma_buf = NULL;
dmabuf_obj_put(obj);
intel_gvt_hypervisor_put_vfio_device(vgpu);
mutex_unlock(&vgpu->dmabuf_lock);
} else {
/* vgpu is NULL, as it has been removed already */
gem_obj->base.dma_buf = NULL;
dmabuf_obj_put(obj);
}
}
static const struct drm_i915_gem_object_ops intel_vgpu_gem_ops = {
@ -471,12 +483,6 @@ int intel_vgpu_get_dmabuf(struct intel_vgpu *vgpu, unsigned int dmabuf_id)
}
dmabuf_fd = ret;
if (intel_gvt_hypervisor_get_vfio_device(vgpu)) {
gvt_vgpu_err("get vfio device failed\n");
put_unused_fd(ret);
goto out_free_dmabuf;
}
dmabuf_obj_get(dmabuf_obj);
if (dmabuf_obj->initref) {
@ -518,6 +524,14 @@ void intel_vgpu_dmabuf_cleanup(struct intel_vgpu *vgpu)
dmabuf_obj->initref = false;
dmabuf_obj_put(dmabuf_obj);
}
idr_remove(&vgpu->object_idr, dmabuf_obj->dmabuf_id);
if (dmabuf_obj->vgpu)
intel_gvt_hypervisor_put_vfio_device(vgpu);
dmabuf_obj->vgpu = NULL;
}
mutex_unlock(&vgpu->dmabuf_lock);
}