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drm/radeon: fix VM IB handling 

Calling radeon_vm_bo_find on the IB BO during CS
is illegal and can lead to an crash.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2014-07-18 13:48:10 +02:00 committed by Alex Deucher
parent 036bf46a39
commit cc9e67e3d7
4 changed files with 19 additions and 16 deletions
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2
drivers/gpu/drm/radeon/radeon.h
View File

@ -879,6 +879,8 @@ struct radeon_vm {
/* array of page tables, one for each page directory entry */
struct radeon_vm_pt *page_tables;
struct radeon_bo_va *ib_bo_va;
struct mutex mutex;
/* last fence for cs using this vm */
struct radeon_fence *fence;

6
drivers/gpu/drm/radeon/radeon_cs.c
View File

@ -472,13 +472,13 @@ static int radeon_bo_vm_update_pte(struct radeon_cs_parser *p,
if (r)
return r;
bo_va = radeon_vm_bo_find(vm, rdev->ring_tmp_bo.bo);
if (bo_va == NULL) {
if (vm->ib_bo_va == NULL) {
DRM_ERROR("Tmp BO not in VM!\n");
return -EINVAL;
}
r = radeon_vm_bo_update(rdev, bo_va, &rdev->ring_tmp_bo.bo->tbo.mem);
r = radeon_vm_bo_update(rdev, vm->ib_bo_va,
&rdev->ring_tmp_bo.bo->tbo.mem);
if (r)
return r;

26
drivers/gpu/drm/radeon/radeon_kms.c
View File

@ -579,7 +579,7 @@ int radeon_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
/* new gpu have virtual address space support */
if (rdev->family >= CHIP_CAYMAN) {
struct radeon_fpriv *fpriv;
struct radeon_bo_va *bo_va;
struct radeon_vm *vm;
int r;
fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
@ -587,7 +587,8 @@ int radeon_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
return -ENOMEM;
}
r = radeon_vm_init(rdev, &fpriv->vm);
vm = &fpriv->vm;
r = radeon_vm_init(rdev, vm);
if (r) {
kfree(fpriv);
return r;
@ -596,22 +597,23 @@ int radeon_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
if (rdev->accel_working) {
r = radeon_bo_reserve(rdev->ring_tmp_bo.bo, false);
if (r) {
radeon_vm_fini(rdev, &fpriv->vm);
radeon_vm_fini(rdev, vm);
kfree(fpriv);
return r;
}
/* map the ib pool buffer read only into
* virtual address space */
bo_va = radeon_vm_bo_add(rdev, &fpriv->vm,
rdev->ring_tmp_bo.bo);
r = radeon_vm_bo_set_addr(rdev, bo_va, RADEON_VA_IB_OFFSET,
vm->ib_bo_va = radeon_vm_bo_add(rdev, vm,
rdev->ring_tmp_bo.bo);
r = radeon_vm_bo_set_addr(rdev, vm->ib_bo_va,
RADEON_VA_IB_OFFSET,
RADEON_VM_PAGE_READABLE |
RADEON_VM_PAGE_SNOOPED);
radeon_bo_unreserve(rdev->ring_tmp_bo.bo);
if (r) {
radeon_vm_fini(rdev, &fpriv->vm);
radeon_vm_fini(rdev, vm);
kfree(fpriv);
return r;
}
@ -640,21 +642,19 @@ void radeon_driver_postclose_kms(struct drm_device *dev,
/* new gpu have virtual address space support */
if (rdev->family >= CHIP_CAYMAN && file_priv->driver_priv) {
struct radeon_fpriv *fpriv = file_priv->driver_priv;
struct radeon_bo_va *bo_va;
struct radeon_vm *vm = &fpriv->vm;
int r;
if (rdev->accel_working) {
r = radeon_bo_reserve(rdev->ring_tmp_bo.bo, false);
if (!r) {
bo_va = radeon_vm_bo_find(&fpriv->vm,
rdev->ring_tmp_bo.bo);
if (bo_va)
radeon_vm_bo_rmv(rdev, bo_va);
if (vm->ib_bo_va)
radeon_vm_bo_rmv(rdev, vm->ib_bo_va);
radeon_bo_unreserve(rdev->ring_tmp_bo.bo);
}
}
radeon_vm_fini(rdev, &fpriv->vm);
radeon_vm_fini(rdev, vm);
kfree(fpriv);
file_priv->driver_priv = NULL;
}

1
drivers/gpu/drm/radeon/radeon_vm.c
View File

@ -1007,6 +1007,7 @@ int radeon_vm_init(struct radeon_device *rdev, struct radeon_vm *vm)
int r;
vm->id = 0;
vm->ib_bo_va = NULL;
vm->fence = NULL;
vm->last_flush = NULL;
vm->last_id_use = NULL;