drm/xe: Dump Indirect Ring State registers

Dump INDIRECT_RING_STATE and RING_START_UDW registers.

v2: Add bspec reference

Bspec: 67137, 67138
Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Reviewed-by: Stuart Summers <stuart.summers@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240507224255.5059-4-niranjana.vishwanathapura@intel.com

drivers/gpu/drm/xe/regs/xe_engine_regs.h

@@ -55,6 +55,8 @@
 #define   RING_CTL_SIZE(size)			((size) - PAGE_SIZE) /* in bytes -> pages */
 #define   RING_CTL_SIZE(size)			((size) - PAGE_SIZE) /* in bytes -> pages */
 
+#define RING_START_UDW(base)			XE_REG((base) + 0x48)
+
 #define RING_PSMI_CTL(base)			XE_REG((base) + 0x50, XE_REG_OPTION_MASKED)
 #define   RC_SEMA_IDLE_MSG_DISABLE		REG_BIT(12)
 #define   WAIT_FOR_EVENT_POWER_DOWN_DISABLE	REG_BIT(7)
@@ -110,6 +112,8 @@
 #define   FF_DOP_CLOCK_GATE_DISABLE		REG_BIT(1)
 #define   REPLAY_MODE_GRANULARITY		REG_BIT(0)
 
+#define INDIRECT_RING_STATE(base)		XE_REG((base) + 0x108)
+
 #define RING_BBADDR(base)			XE_REG((base) + 0x140)
 #define RING_BBADDR_UDW(base)			XE_REG((base) + 0x168)
 

drivers/gpu/drm/xe/xe_hw_engine.c

@@ -908,6 +908,13 @@ xe_hw_engine_snapshot_capture(struct xe_hw_engine *hwe)
 	snapshot->reg.ring_hwstam = hw_engine_mmio_read32(hwe, RING_HWSTAM(0));
 	snapshot->reg.ring_hws_pga = hw_engine_mmio_read32(hwe, RING_HWS_PGA(0));
 	snapshot->reg.ring_start = hw_engine_mmio_read32(hwe, RING_START(0));
+	if (xe_gt_has_indirect_ring_state(hwe->gt)) {
+		snapshot->reg.indirect_ring_state =
+			hw_engine_mmio_read32(hwe, INDIRECT_RING_STATE(0));
+		snapshot->reg.ring_start_udw =
+			hw_engine_mmio_read32(hwe, RING_START_UDW(0));
+	}
+
 	snapshot->reg.ring_head =
 		hw_engine_mmio_read32(hwe, RING_HEAD(0)) & HEAD_ADDR;
 	snapshot->reg.ring_tail =
@@ -997,6 +1004,8 @@ void xe_hw_engine_snapshot_print(struct xe_hw_engine_snapshot *snapshot,
 	drm_printf(p, "\tRING_EXECLIST_SQ_CONTENTS: 0x%016llx\n",
 		   snapshot->reg.ring_execlist_sq_contents);
 	drm_printf(p, "\tRING_START: 0x%08x\n", snapshot->reg.ring_start);
+	drm_printf(p, "\tRING_START_UDW: 0x%08x\n",
+		   snapshot->reg.ring_start_udw);
 	drm_printf(p, "\tRING_HEAD: 0x%08x\n", snapshot->reg.ring_head);
 	drm_printf(p, "\tRING_TAIL: 0x%08x\n", snapshot->reg.ring_tail);
 	drm_printf(p, "\tRING_CTL: 0x%08x\n", snapshot->reg.ring_ctl);
@@ -1010,6 +1019,8 @@ void xe_hw_engine_snapshot_print(struct xe_hw_engine_snapshot *snapshot,
 	drm_printf(p, "\tACTHD: 0x%016llx\n", snapshot->reg.ring_acthd);
 	drm_printf(p, "\tBBADDR: 0x%016llx\n", snapshot->reg.ring_bbaddr);
 	drm_printf(p, "\tDMA_FADDR: 0x%016llx\n", snapshot->reg.ring_dma_fadd);
+	drm_printf(p, "\tINDIRECT_RING_STATE: 0x%08x\n",
+		   snapshot->reg.indirect_ring_state);
 	drm_printf(p, "\tIPEHR: 0x%08x\n", snapshot->reg.ipehr);
 	xe_hw_engine_snapshot_instdone_print(snapshot, p);
 

drivers/gpu/drm/xe/xe_hw_engine_types.h

@@ -189,6 +189,8 @@ struct xe_hw_engine_snapshot {
 		u32 ring_hws_pga;
 		/** @reg.ring_start: RING_START */
 		u32 ring_start;
+		/** @reg.ring_start_udw: RING_START_UDW */
+		u32 ring_start_udw;
 		/** @reg.ring_head: RING_HEAD */
 		u32 ring_head;
 		/** @reg.ring_tail: RING_TAIL */
@@ -207,6 +209,8 @@ struct xe_hw_engine_snapshot {
 		u32 ring_emr;
 		/** @reg.ring_eir: RING_EIR */
 		u32 ring_eir;
+		/** @reg.indirect_ring_state: INDIRECT_RING_STATE */
+		u32 indirect_ring_state;
 		/** @reg.ipehr: IPEHR */
 		u32 ipehr;
 		/** @reg.rcu_mode: RCU_MODE */