drm/xe/guc: Update few GuC CTB ABI definitions

In upcoming new GuC ABI definitions we will want to refer to max
number of dwords that could fit into CTB HXG message. Add explicit
definition named as GUC_CTB_MAX_DWORDS and start using it.

Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://lore.kernel.org/r/20240104222031.277-6-michal.wajdeczko@intel.com
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>

diff --git a/drivers/gpu/drm/xe/abi/guc_communication_ctb_abi.h b/drivers/gpu/drm/xe/abi/guc_communication_ctb_abi.h
index 3b83f90..4aaed1c 100644 (file)
--- a/drivers/gpu/drm/xe/abi/guc_communication_ctb_abi.h
+++ b/drivers/gpu/drm/xe/abi/guc_communication_ctb_abi.h
@@ -81,12 +81,13 @@ static_assert(sizeof(struct guc_ct_buffer_desc) == 64);
 
 #define GUC_CTB_HDR_LEN                                1u
 #define GUC_CTB_MSG_MIN_LEN                    GUC_CTB_HDR_LEN
-#define GUC_CTB_MSG_MAX_LEN                    256u
+#define GUC_CTB_MSG_MAX_LEN                    (GUC_CTB_MSG_MIN_LEN + GUC_CTB_MAX_DWORDS)
 #define GUC_CTB_MSG_0_FENCE                    (0xffff << 16)
 #define GUC_CTB_MSG_0_FORMAT                   (0xf << 12)
 #define   GUC_CTB_FORMAT_HXG                   0u
 #define GUC_CTB_MSG_0_RESERVED                 (0xf << 8)
 #define GUC_CTB_MSG_0_NUM_DWORDS               (0xff << 0)
+#define   GUC_CTB_MAX_DWORDS                   255
 
 /**
  * DOC: CTB HXG Message