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-rw-r--r--src/mesa/drivers/dri/i965/brw_device_info.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_device_info.c b/src/mesa/drivers/dri/i965/brw_device_info.c
index 2ebc0845300..45505507be7 100644
--- a/src/mesa/drivers/dri/i965/brw_device_info.c
+++ b/src/mesa/drivers/dri/i965/brw_device_info.c
@@ -337,6 +337,15 @@ static const struct brw_device_info brw_device_info_skl_gt3 = {
static const struct brw_device_info brw_device_info_skl_gt4 = {
GEN9_FEATURES, .gt = 4,
+ /* From the "L3 Allocation and Programming" documentation:
+ *
+ * "URB is limited to 1008KB due to programming restrictions. This is not a
+ * restriction of the L3 implementation, but of the FF and other clients.
+ * Therefore, in a GT4 implementation it is possible for the programmed
+ * allocation of the L3 data array to provide 3*384KB=1152KB for URB, but
+ * only 1008KB of this will be used."
+ */
+ .urb.size = 1008 / 3,
};
static const struct brw_device_info brw_device_info_bxt = {