Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-26 06:02:05 +00:00
Code Issues Packages Projects Releases Wiki Activity

drm/xe/xe2: Add performance tuning for L3 cache flushing

Browse Source 
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@intel.com>
Cc: Tejas Upadhyay <tejas.upadhyay@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240920211459.255181-5-gustavo.sousa@intel.com
(cherry picked from commit 876253165f)
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
This commit is contained in:
Gustavo Sousa 2024-09-20 18:13:18 -03:00 committed by Lucas De Marchi
parent 3bf90935aa
commit 6ef5a04221
2 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/gpu/drm/xe/regs/xe_gt_regs.h
View File

@ -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)

8
drivers/gpu/drm/xe/xe_tuning.c
View File

@ -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))
},
{}
};