drm/xe: Add MI_SEMAPHORE_WAIT command definition

This command supports memory based Semaphore WAIT. Memory based
semaphores will be used for synchronization between the Producer
and the Consumer contexts. Producer and Consumer Contexts could
be running on different engines or on the same engine inside GT.

Bspec: 45749, 60244
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
Link: https://patch.msgid.link/20260303201354.17948-3-michal.wajdeczko@intel.com

diff --git a/drivers/gpu/drm/xe/instructions/xe_mi_commands.h b/drivers/gpu/drm/xe/instructions/xe_mi_commands.h
index c47b290e0e9f6b10ed28e261fa1c7979c8020fb9..29569eff1af3bace4df593ae1935f19d40ea1228 100644 (file)
--- a/drivers/gpu/drm/xe/instructions/xe_mi_commands.h
+++ b/drivers/gpu/drm/xe/instructions/xe_mi_commands.h
@@ -34,6 +34,19 @@
 #define MI_FORCE_WAKEUP                        __MI_INSTR(0x1D)
 #define MI_MATH(n)                     (__MI_INSTR(0x1A) | XE_INSTR_NUM_DW((n) + 1))
 
+#define MI_SEMAPHORE_WAIT              (__MI_INSTR(0x1c) | XE_INSTR_NUM_DW(5))
+#define   MI_SEMW_GGTT                 REG_BIT(22)
+#define   MI_SEMW_POLL                 REG_BIT(15)
+#define   MI_SEMW_COMPARE_OP_MASK      REG_GENMASK(14, 12)
+#define     COMPARE_OP_SAD_GT_SDD      0
+#define     COMPARE_OP_SAD_GTE_SDD     1
+#define     COMPARE_OP_SAD_LT_SDD      2
+#define     COMPARE_OP_SAD_LTE_SDD     3
+#define     COMPARE_OP_SAD_EQ_SDD      4
+#define     COMPARE_OP_SAD_NEQ_SDD     5
+#define   MI_SEMW_COMPARE(OP)          REG_FIELD_PREP(MI_SEMW_COMPARE_OP_MASK, COMPARE_OP_##OP)
+#define   MI_SEMW_TOKEN(token)         REG_FIELD_PREP(REG_GENMASK(9, 2), (token))
+
 #define MI_STORE_DATA_IMM              __MI_INSTR(0x20)
 #define   MI_SDI_GGTT                  REG_BIT(22)
 #define   MI_SDI_LEN_DW                        GENMASK(9, 0)