From: Gustavo Sousa <gustavo.sousa@xxxxxxxxx>
commit 6ef5a04221aaeb858d1a825b2ecb7e200cac80f8 upstream.
A recommended performance tuning for LNL related to L3 cache flushing
was recently introduced in Bspec. Implement it.
Unlike the other existing tuning settings, we limit this one for LNL
only, since there is no info about whether this would be applicable to
other platforms yet. In the future we can come back and use IP version
ranges if applicable.
v2:
- Fix reference to Bspec. (Sai Teja, Tejas)
- Use correct register name for "Tuning: L3 RW flush all Cache". (Sai
Teja)
- Use SCRATCH3_LBCF (with the underscore) for better readability.
v3:
- Limit setting to LNL only. (Matt)
Bspec: 72161
Cc: Sai Teja Pottumuttu <sai.teja.pottumuttu@xxxxxxxxx>
Cc: Tejas Upadhyay <tejas.upadhyay@xxxxxxxxx>
Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
Signed-off-by: Gustavo Sousa <gustavo.sousa@xxxxxxxxx>
Reviewed-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
Reviewed-by: Tejas Upadhyay <tejas.upadhyay@xxxxxxxxx>
Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240920211459.255181-5-gustavo.sousa@xxxxxxxxx
(cherry picked from commit 876253165f3eaaacacb8c8bed16a9df4b6081479)
Signed-off-by: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
---
drivers/gpu/drm/xe/regs/xe_gt_regs.h | 5 +++++
drivers/gpu/drm/xe/xe_tuning.c | 8 ++++++++
2 files changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/xe/regs/xe_gt_regs.h b/drivers/gpu/drm/xe/regs/xe_gt_regs.h
index d1b5be2585eda..224ab4a425258 100644
--- a/drivers/gpu/drm/xe/regs/xe_gt_regs.h
+++ b/drivers/gpu/drm/xe/regs/xe_gt_regs.h
@@ -380,6 +380,9 @@
#define L3SQCREG3 XE_REG_MCR(0xb108)
#define COMPPWOVERFETCHEN REG_BIT(28)
+#define SCRATCH3_LBCF XE_REG_MCR(0xb154)
+#define RWFLUSHALLEN REG_BIT(17)
+
#define XEHP_L3SQCREG5 XE_REG_MCR(0xb158)
#define L3_PWM_TIMER_INIT_VAL_MASK REG_GENMASK(9, 0)
@@ -397,6 +400,8 @@
#define XE2LPM_L3SQCREG3 XE_REG_MCR(0xb608)
+#define XE2LPM_SCRATCH3_LBCF XE_REG_MCR(0xb654)
+
#define XE2LPM_L3SQCREG5 XE_REG_MCR(0xb658)
#define XE2_TDF_CTRL XE_REG(0xb418)
diff --git a/drivers/gpu/drm/xe/xe_tuning.c b/drivers/gpu/drm/xe/xe_tuning.c
index c798ae1b3f750..0d5e04158917b 100644
--- a/drivers/gpu/drm/xe/xe_tuning.c
+++ b/drivers/gpu/drm/xe/xe_tuning.c
@@ -75,6 +75,14 @@ static const struct xe_rtp_entry_sr gt_tunings[] = {
XE_RTP_ACTIONS(FIELD_SET(STATELESS_COMPRESSION_CTRL, UNIFIED_COMPRESSION_FORMAT,
REG_FIELD_PREP(UNIFIED_COMPRESSION_FORMAT, 0)))
},
+ { XE_RTP_NAME("Tuning: L3 RW flush all Cache"),
+ XE_RTP_RULES(GRAPHICS_VERSION(2004)),
+ XE_RTP_ACTIONS(SET(SCRATCH3_LBCF, RWFLUSHALLEN))
+ },
+ { XE_RTP_NAME("Tuning: L3 RW flush all cache - media"),
+ XE_RTP_RULES(MEDIA_VERSION(2000)),
+ XE_RTP_ACTIONS(SET(XE2LPM_SCRATCH3_LBCF, RWFLUSHALLEN))
+ },
{}
};
--
2.47.0
