[Intel-xe] [PATCH] drm/xe/guc: Return the lower part of blocking H2G message

[Matthew Brost]

The upper layers may need this data, an example of this is allocating
DIST doorbell.

v2 (Michal): Drop change of checking the return value.

Signed-off-by: Matthew Brost <matthew.brost at intel.com>
---
 drivers/gpu/drm/xe/xe_guc_ct.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_guc_ct.c b/drivers/gpu/drm/xe/xe_guc_ct.c
index 8b686c8b3339..092a9563f80a 100644
--- a/drivers/gpu/drm/xe/xe_guc_ct.c
+++ b/drivers/gpu/drm/xe/xe_guc_ct.c
@@ -26,6 +26,7 @@
 struct g2h_fence {
 	u32 *response_buffer;
 	u32 seqno;
+	u32 status;
 	u16 response_len;
 	u16 error;
 	u16 hint;
@@ -749,7 +750,7 @@ static int guc_ct_send_recv(struct xe_guc_ct *ct, const u32 *action, u32 len,
 		ret = -EIO;
 	}
 
-	return ret > 0 ? 0 : ret;
+	return ret > 0 ? g2h_fence.status : ret;
 }
 
 int xe_guc_ct_send_recv(struct xe_guc_ct *ct, const u32 *action, u32 len,
@@ -815,6 +816,9 @@ static int parse_g2h_response(struct xe_guc_ct *ct, u32 *msg, u32 len)
 		g2h_fence->response_len = response_len;
 		memcpy(g2h_fence->response_buffer, msg + GUC_CTB_MSG_MIN_LEN,
 		       response_len * sizeof(u32));
+	} else {
+		g2h_fence->status =
+			FIELD_GET(GUC_HXG_RESPONSE_MSG_0_DATA0, msg[1]);
 	}
 
 	g2h_release_space(ct, GUC_CTB_HXG_MSG_MAX_LEN);
-- 
2.34.1