[PATCH v2 1/2] drm/xe/guc: Capture all available bits of GuC timestamp

[John.C.Harrison@Intel.com]

From: John Harrison <John.C.Harrison@Intel.com>

The extra bits are not hugely useful because the GuC log only uses
32bit time stamps. But they exist so might as well provide them.

Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/xe/regs/xe_guc_regs.h | 3 ++-
 drivers/gpu/drm/xe/xe_guc_log.c       | 6 +++---
 drivers/gpu/drm/xe/xe_guc_log_types.h | 2 +-
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/xe/regs/xe_guc_regs.h b/drivers/gpu/drm/xe/regs/xe_guc_regs.h
index b27b73680c12..2118f7dec287 100644
--- a/drivers/gpu/drm/xe/regs/xe_guc_regs.h
+++ b/drivers/gpu/drm/xe/regs/xe_guc_regs.h
@@ -84,7 +84,8 @@
 #define   HUC_LOADING_AGENT_GUC			REG_BIT(1)
 #define   GUC_WOPCM_OFFSET_VALID		REG_BIT(0)
 #define GUC_MAX_IDLE_COUNT			XE_REG(0xc3e4)
-#define GUC_PMTIMESTAMP				XE_REG(0xc3e8)
+#define GUC_PMTIMESTAMP_LO			XE_REG(0xc3e8)
+#define GUC_PMTIMESTAMP_HI			XE_REG(0xc3ec)
 
 #define GUC_SEND_INTERRUPT			XE_REG(0xc4c8)
 #define   GUC_SEND_TRIGGER			REG_BIT(0)
diff --git a/drivers/gpu/drm/xe/xe_guc_log.c b/drivers/gpu/drm/xe/xe_guc_log.c
index fead96216243..df4cfb698cdb 100644
--- a/drivers/gpu/drm/xe/xe_guc_log.c
+++ b/drivers/gpu/drm/xe/xe_guc_log.c
@@ -171,9 +171,9 @@ struct xe_guc_log_snapshot *xe_guc_log_snapshot_capture(struct xe_guc_log *log,
 
 	fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
 	if (!fw_ref) {
-		snapshot->stamp = ~0;
+		snapshot->stamp = ~0ULL;
 	} else {
-		snapshot->stamp = xe_mmio_read32(&gt->mmio, GUC_PMTIMESTAMP);
+		snapshot->stamp = xe_mmio_read64_2x32(&gt->mmio, GUC_PMTIMESTAMP_LO);
 		xe_force_wake_put(gt_to_fw(gt), fw_ref);
 	}
 	snapshot->ktime = ktime_get_boottime_ns();
@@ -205,7 +205,7 @@ void xe_guc_log_snapshot_print(struct xe_guc_log_snapshot *snapshot, struct drm_
 		   snapshot->ver_found.major, snapshot->ver_found.minor, snapshot->ver_found.patch,
 		   snapshot->ver_want.major, snapshot->ver_want.minor, snapshot->ver_want.patch);
 	drm_printf(p, "Kernel timestamp: 0x%08llX [%llu]\n", snapshot->ktime, snapshot->ktime);
-	drm_printf(p, "GuC timestamp: 0x%08X [%u]\n", snapshot->stamp, snapshot->stamp);
+	drm_printf(p, "GuC timestamp: 0x%08llX [%llu]\n", snapshot->stamp, snapshot->stamp);
 	drm_printf(p, "Log level: %u\n", snapshot->level);
 
 	remain = snapshot->size;
diff --git a/drivers/gpu/drm/xe/xe_guc_log_types.h b/drivers/gpu/drm/xe/xe_guc_log_types.h
index 4d57f8322efc..b3d5c72ac752 100644
--- a/drivers/gpu/drm/xe/xe_guc_log_types.h
+++ b/drivers/gpu/drm/xe/xe_guc_log_types.h
@@ -27,7 +27,7 @@ struct xe_guc_log_snapshot {
 	/** @ktime: Kernel time the snapshot was taken */
 	u64 ktime;
 	/** @stamp: GuC timestamp at which the snapshot was taken */
-	u32 stamp;
+	u64 stamp;
 	/** @level: GuC log verbosity level */
 	u32 level;
 	/** @ver_found: GuC firmware version */
-- 
2.47.0