[PATCH v2 4/9] drm/xe/multi_queue: Add helpers to access CS QUEUE TIMESTAMP from lrc

[Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>]

In secondary queue LRCs, the QUEUE TIMESTAMP register is saved and
restored allowing us to view the individual queue run times. Add helpers
to read this value from the LRC.

BSpec: 73988

Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
---
v2: (Matt)
- Add BSpec reference
- Make queue_timestamp snapshot 64 bit
- Add a snapshot of queue timestamp in ms
---
 drivers/gpu/drm/xe/regs/xe_lrc_layout.h |  3 ++
 drivers/gpu/drm/xe/xe_lrc.c             | 47 +++++++++++++++++++++++++
 drivers/gpu/drm/xe/xe_lrc.h             |  2 ++
 drivers/gpu/drm/xe/xe_lrc_types.h       |  3 ++
 4 files changed, 55 insertions(+)

diff --git a/drivers/gpu/drm/xe/regs/xe_lrc_layout.h b/drivers/gpu/drm/xe/regs/xe_lrc_layout.h
index b5eff383902c..4ab86fc369fd 100644
--- a/drivers/gpu/drm/xe/regs/xe_lrc_layout.h
+++ b/drivers/gpu/drm/xe/regs/xe_lrc_layout.h
@@ -34,6 +34,9 @@
 #define CTX_CS_INT_VEC_REG		0x5a
 #define CTX_CS_INT_VEC_DATA		(CTX_CS_INT_VEC_REG + 1)
 
+#define CTX_QUEUE_TIMESTAMP		(0xd0 + 1)
+#define CTX_QUEUE_TIMESTAMP_UDW		(0xd2 + 1)
+
 #define INDIRECT_CTX_RING_HEAD		(0x02 + 1)
 #define INDIRECT_CTX_RING_TAIL		(0x04 + 1)
 #define INDIRECT_CTX_RING_START		(0x06 + 1)
diff --git a/drivers/gpu/drm/xe/xe_lrc.c b/drivers/gpu/drm/xe/xe_lrc.c
index d85c712d106b..2ee52efb9219 100644
--- a/drivers/gpu/drm/xe/xe_lrc.c
+++ b/drivers/gpu/drm/xe/xe_lrc.c
@@ -789,6 +789,16 @@ static u32 __xe_lrc_ctx_timestamp_udw_offset(struct xe_lrc *lrc)
 	return __xe_lrc_regs_offset(lrc) + CTX_TIMESTAMP_UDW * sizeof(u32);
 }
 
+static u32 __xe_lrc_queue_timestamp_offset(struct xe_lrc *lrc)
+{
+	return __xe_lrc_regs_offset(lrc) + CTX_QUEUE_TIMESTAMP * sizeof(u32);
+}
+
+static u32 __xe_lrc_queue_timestamp_udw_offset(struct xe_lrc *lrc)
+{
+	return __xe_lrc_regs_offset(lrc) + CTX_QUEUE_TIMESTAMP_UDW * sizeof(u32);
+}
+
 static inline u32 __xe_lrc_indirect_ring_offset(struct xe_lrc *lrc)
 {
 	u32 offset = xe_bo_size(lrc->bo) - LRC_WA_BB_SIZE -
@@ -838,6 +848,8 @@ DECL_MAP_ADDR_HELPERS(ctx_timestamp_udw, lrc->bo)
 DECL_MAP_ADDR_HELPERS(parallel, lrc->bo)
 DECL_MAP_ADDR_HELPERS(indirect_ring, lrc->bo)
 DECL_MAP_ADDR_HELPERS(engine_id, lrc->bo)
+DECL_MAP_ADDR_HELPERS(queue_timestamp, lrc->bo)
+DECL_MAP_ADDR_HELPERS(queue_timestamp_udw, lrc->bo)
 
 #undef DECL_MAP_ADDR_HELPERS
 
@@ -886,6 +898,30 @@ static u64 xe_lrc_ctx_timestamp(struct xe_lrc *lrc)
 	return (u64)udw << 32 | ldw;
 }
 
+/**
+ * xe_lrc_queue_timestamp() - Read queue timestamp value
+ * @lrc: Pointer to the lrc.
+ *
+ * Returns: queue timestamp value
+ */
+static u64 xe_lrc_queue_timestamp(struct xe_lrc *lrc)
+{
+	struct xe_device *xe = lrc_to_xe(lrc);
+	struct iosys_map map;
+	u32 ldw, udw = 0;
+
+	if (!xe_lrc_is_multi_queue(lrc))
+		return 0;
+
+	map = __xe_lrc_queue_timestamp_map(lrc);
+	ldw = xe_map_read32(xe, &map);
+
+	map = __xe_lrc_queue_timestamp_udw_map(lrc);
+	udw = xe_map_read32(xe, &map);
+
+	return (u64)udw << 32 | ldw;
+}
+
 /**
  * xe_lrc_ctx_job_timestamp_ggtt_addr() - Get ctx job timestamp GGTT address
  * @lrc: Pointer to the lrc.
@@ -1551,6 +1587,12 @@ static int xe_lrc_ctx_init(struct xe_lrc *lrc, struct xe_hw_engine *hwe, struct
 	if (lrc_to_xe(lrc)->info.has_64bit_timestamp)
 		xe_lrc_write_ctx_reg(lrc, CTX_TIMESTAMP_UDW, 0);
 
+	if (xe_lrc_is_multi_queue(lrc)) {
+		lrc->queue_timestamp = 0;
+		xe_lrc_write_ctx_reg(lrc, CTX_QUEUE_TIMESTAMP, 0);
+		xe_lrc_write_ctx_reg(lrc, CTX_QUEUE_TIMESTAMP_UDW, 0);
+	}
+
 	if (xe->info.has_asid && vm)
 		xe_lrc_write_ctx_reg(lrc, CTX_ASID, vm->usm.asid);
 
@@ -2479,6 +2521,9 @@ struct xe_lrc_snapshot *xe_lrc_snapshot_capture(struct xe_lrc *lrc)
 	snapshot->ctx_timestamp = xe_lrc_ctx_timestamp(lrc);
 	snapshot->ctx_timestamp_ms =
 		xe_gt_clock_interval_to_ms(lrc->gt, xe_lrc_ctx_timestamp(lrc));
+	snapshot->queue_timestamp = xe_lrc_queue_timestamp(lrc);
+	snapshot->queue_timestamp_ms =
+		xe_gt_clock_interval_to_ms(lrc->gt, xe_lrc_queue_timestamp(lrc));
 	snapshot->ctx_job_timestamp = xe_lrc_ctx_job_timestamp(lrc);
 	return snapshot;
 }
@@ -2533,6 +2578,8 @@ void xe_lrc_snapshot_print(struct xe_lrc_snapshot *snapshot, struct drm_printer
 	drm_printf(p, "\tSeqno: (memory) %d\n", snapshot->seqno);
 	drm_printf(p, "\tTimestamp: 0x%016llx\n", snapshot->ctx_timestamp);
 	drm_printf(p, "\tTimestamp ms: %llu\n", snapshot->ctx_timestamp_ms);
+	drm_printf(p, "\tQueue Timestamp: 0x%016llx\n", snapshot->queue_timestamp);
+	drm_printf(p, "\tQueue Timestamp ms: %llu\n", snapshot->queue_timestamp_ms);
 	drm_printf(p, "\tJob Timestamp: 0x%08x\n", snapshot->ctx_job_timestamp);
 
 	if (!snapshot->lrc_snapshot)
diff --git a/drivers/gpu/drm/xe/xe_lrc.h b/drivers/gpu/drm/xe/xe_lrc.h
index 3d0bf4a7bfa0..12d08808ac75 100644
--- a/drivers/gpu/drm/xe/xe_lrc.h
+++ b/drivers/gpu/drm/xe/xe_lrc.h
@@ -38,8 +38,10 @@ struct xe_lrc_snapshot {
 	u32 start_seqno;
 	u32 seqno;
 	u64 ctx_timestamp;
+	u64 queue_timestamp;
 	u32 ctx_job_timestamp;
 	u64 ctx_timestamp_ms;
+	u64 queue_timestamp_ms;
 };
 
 #define LRC_PPHWSP_FLUSH_INVAL_SCRATCH_ADDR (0x34 * 4)
diff --git a/drivers/gpu/drm/xe/xe_lrc_types.h b/drivers/gpu/drm/xe/xe_lrc_types.h
index 0a5c13ec2ad7..53ef48feebfc 100644
--- a/drivers/gpu/drm/xe/xe_lrc_types.h
+++ b/drivers/gpu/drm/xe/xe_lrc_types.h
@@ -64,6 +64,9 @@ struct xe_lrc {
 	/** @ctx_timestamp: readout value of CTX_TIMESTAMP on last update */
 	u64 ctx_timestamp;
 
+	/** @queue_timestamp: value of QUEUE_TIMESTAMP on last update */
+	u64 queue_timestamp;
+
 	/** @multi_queue: Multi queue LRC related information */
 	struct {
 		/** @multi_queue.primary_lrc: Primary lrc of this multi-queue group*/
-- 
2.43.0