[PATCH v5 1/3] drm/xe: Take ref to VM in delayed snapshot
Matthew Brost
matthew.brost at intel.com
Thu Aug 1 15:41:16 UTC 2024
Kernel BO's don't take a ref to the VM, we need the VM for the
delayed snapshot, so take a ref to the VM in delayed snapshot.
v2:
- Check for lrc_bo before taking a VM ref (CI)
- Check lrc_bo->vm before taking / dropping a VM ref (CI)
- Drop VM in xe_lrc_snapshot_free
v5:
- Fix commit message wording (Johnathan)
47058633d9c5 ("drm/xe: Move lrc snapshot capturing to xe_lrc.c")
Cc: Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Signed-off-by: Matthew Brost <matthew.brost at intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt at intel.com>
---
drivers/gpu/drm/xe/xe_lrc.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/xe/xe_lrc.c b/drivers/gpu/drm/xe/xe_lrc.c
index 94ff62e1d95e..58121821f081 100644
--- a/drivers/gpu/drm/xe/xe_lrc.c
+++ b/drivers/gpu/drm/xe/xe_lrc.c
@@ -1634,6 +1634,9 @@ struct xe_lrc_snapshot *xe_lrc_snapshot_capture(struct xe_lrc *lrc)
if (!snapshot)
return NULL;
+ if (lrc->bo && lrc->bo->vm)
+ xe_vm_get(lrc->bo->vm);
+
snapshot->context_desc = xe_lrc_ggtt_addr(lrc);
snapshot->indirect_context_desc = xe_lrc_indirect_ring_ggtt_addr(lrc);
snapshot->head = xe_lrc_ring_head(lrc);
@@ -1653,12 +1656,14 @@ struct xe_lrc_snapshot *xe_lrc_snapshot_capture(struct xe_lrc *lrc)
void xe_lrc_snapshot_capture_delayed(struct xe_lrc_snapshot *snapshot)
{
struct xe_bo *bo;
+ struct xe_vm *vm;
struct iosys_map src;
if (!snapshot)
return;
bo = snapshot->lrc_bo;
+ vm = bo->vm;
snapshot->lrc_bo = NULL;
snapshot->lrc_snapshot = kvmalloc(snapshot->lrc_size, GFP_KERNEL);
@@ -1678,6 +1683,8 @@ void xe_lrc_snapshot_capture_delayed(struct xe_lrc_snapshot *snapshot)
xe_bo_unlock(bo);
put_bo:
xe_bo_put(bo);
+ if (vm)
+ xe_vm_put(vm);
}
void xe_lrc_snapshot_print(struct xe_lrc_snapshot *snapshot, struct drm_printer *p)
@@ -1727,8 +1734,14 @@ void xe_lrc_snapshot_free(struct xe_lrc_snapshot *snapshot)
return;
kvfree(snapshot->lrc_snapshot);
- if (snapshot->lrc_bo)
+ if (snapshot->lrc_bo) {
+ struct xe_vm *vm;
+
+ vm = snapshot->lrc_bo->vm;
xe_bo_put(snapshot->lrc_bo);
+ if (vm)
+ xe_vm_put(vm);
+ }
kfree(snapshot);
}
--
2.34.1
More information about the dri-devel
mailing list