[RFC PATCH V7 04/10] drm/xe: Link LRC BO and its execution Queue

[Tejas Upadhyay <tejas.upadhyay@intel.com>]

To establish a link between an LRC BO (Logical Ring Context
Buffer Object) and its corresponding execution Queue in the
drm/xe driver, you need to store a back-pointer to the queue
within the BO's private data structure. This allows the
driver to identify and take corrective action on the specific
queue if the LRC BO encounters an error (e.g., memory
corruption or eviction issues).

Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
---
 drivers/gpu/drm/xe/xe_bo_types.h   | 3 +++
 drivers/gpu/drm/xe/xe_exec_queue.c | 1 +
 2 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_bo_types.h b/drivers/gpu/drm/xe/xe_bo_types.h
index 9d19940b8fc0..a647b775a65c 100644
--- a/drivers/gpu/drm/xe/xe_bo_types.h
+++ b/drivers/gpu/drm/xe/xe_bo_types.h
@@ -20,6 +20,7 @@
 struct xe_device;
 struct xe_mem_pool_node;
 struct xe_vm;
+struct xe_exec_queue;
 
 #define XE_BO_MAX_PLACEMENTS	3
 
@@ -40,6 +41,8 @@ struct xe_bo {
 	u32 flags;
 	/** @vm: VM this BO is attached to, for extobj this will be NULL */
 	struct xe_vm *vm;
+	/** @q: Queue this BO is attached to, mostly for LRC BO, NULL otherwise */
+	struct xe_exec_queue *q;
 	/** @tile: Tile this BO is attached to (kernel BO only) */
 	struct xe_tile *tile;
 	/** @placements: valid placements for this BO */
diff --git a/drivers/gpu/drm/xe/xe_exec_queue.c b/drivers/gpu/drm/xe/xe_exec_queue.c
index 071b8c41df43..632c9603afc1 100644
--- a/drivers/gpu/drm/xe/xe_exec_queue.c
+++ b/drivers/gpu/drm/xe/xe_exec_queue.c
@@ -386,6 +386,7 @@ static int __xe_exec_queue_init(struct xe_exec_queue *q, u32 exec_queue_flags)
 				goto err_lrc;
 			}
 
+			lrc->bo->q = q;
 			xe_exec_queue_set_lrc(q, lrc, i);
 
 			if (__lrc)
-- 
2.52.0