[PATCH v3 4/9] drm/xe: Add pat_index to properties line in VM snapshot capture

[Matthew Brost]

Add pat index to properties line in VM snapshot capture indicating
the VMA caching properites. This is useful information for debug and
will help build a robust GPU hang replay tool.

The current format is:

[<vma address>]: <permissions>|<type>|mem_region=0x%x|pat_index=%d

Permissions has two options, either "read_only" or "read_write".

Type has three options, either "userptr", "null_sparse", or "bo".

Memory region is a bit mask of where the memory is located.

Pat index corresponds to the value setup upon VM bind.

Cc: José Roberto de Souza <jose.souza at intel.com>
Signed-off-by: Matthew Brost <matthew.brost at intel.com>
---
 drivers/gpu/drm/xe/xe_vm.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index a95d5765a258..34bec27a5f45 100644
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -3714,6 +3714,7 @@ struct xe_vm_snapshot {
 #define XE_VM_SNAP_FLAG_IS_NULL		BIT(2)
 		unsigned long flags;
 		int uapi_mem_region;
+		int pat_index;
 		struct xe_bo *bo;
 		void *data;
 		struct mm_struct *mm;
@@ -3756,6 +3757,7 @@ struct xe_vm_snapshot *xe_vm_snapshot_capture(struct xe_vm *vm)
 		snap->snap[i].len = xe_vma_size(vma);
 		snap->snap[i].flags = xe_vma_read_only(vma) ?
 			XE_VM_SNAP_FLAG_READ_ONLY : 0;
+		snap->snap[i].pat_index = vma->pat_index;
 		if (bo) {
 			snap->snap[i].bo = xe_bo_get(bo);
 			snap->snap[i].bo_ofs = xe_vma_bo_offset(vma);
@@ -3857,7 +3859,7 @@ void xe_vm_snapshot_print(struct xe_vm_snapshot *snap, struct drm_printer *p)
 	for (i = 0; i < snap->num_snaps; i++) {
 		drm_printf(p, "[%llx].length: 0x%lx\n", snap->snap[i].ofs, snap->snap[i].len);
 
-		drm_printf(p, "[%llx].properties: %s|%s|mem_region=0x%lx\n",
+		drm_printf(p, "[%llx].properties: %s|%s|mem_region=0x%lx|pat_index=%d\n",
 			   snap->snap[i].ofs,
 			   snap->snap[i].flags & XE_VM_SNAP_FLAG_READ_ONLY ?
 			   "read_only" : "read_write",
@@ -3866,7 +3868,8 @@ void xe_vm_snapshot_print(struct xe_vm_snapshot *snap, struct drm_printer *p)
 			   snap->snap[i].flags & XE_VM_SNAP_FLAG_USERPTR ?
 			   "userptr" : "bo",
 			   snap->snap[i].uapi_mem_region == -1 ? 0 :
-			   BIT(snap->snap[i].uapi_mem_region));
+			   BIT(snap->snap[i].uapi_mem_region),
+			   snap->snap[i].pat_index);
 
 		if (IS_ERR(snap->snap[i].data)) {
 			drm_printf(p, "[%llx].error: %li\n", snap->snap[i].ofs,
-- 
2.34.1