[PATCH] drm/xe: Add debug messages for MMU notifier and VMA invalidate

[Matthew Brost <matthew.brost@intel.com>]

Extra debug is useful when working on VM issues.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/xe/xe_vm.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index 80d43d75b1da..e3692b7e1711 100644
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -648,6 +648,10 @@ static bool vma_userptr_invalidate(struct mmu_interval_notifier *mni,
 	if (!mmu_notifier_range_blockable(range))
 		return false;
 
+	vm_dbg(&xe_vma_vm(vma)->xe->drm,
+	       "NOTIFIER: addr=0x%016llx, range=0x%016llx",
+		xe_vma_start(vma), xe_vma_size(vma));
+
 	down_write(&vm->userptr.notifier_lock);
 	mmu_interval_set_seq(mni, cur_seq);
 
@@ -3233,6 +3237,10 @@ int xe_vm_invalidate_vma(struct xe_vma *vma)
 	xe_assert(xe, !xe_vma_is_null(vma));
 	trace_xe_vma_invalidate(vma);
 
+	vm_dbg(&xe_vma_vm(vma)->xe->drm,
+	       "INVALIDATE: addr=0x%016llx, range=0x%016llx",
+		xe_vma_start(vma), xe_vma_size(vma));
+
 	/* Check that we don't race with page-table updates */
 	if (IS_ENABLED(CONFIG_PROVE_LOCKING)) {
 		if (xe_vma_is_userptr(vma)) {
-- 
2.34.1