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| author | Nirmoy Das <nirmoy.das@intel.com> | 2024-01-04 19:26:15 +0100 |
|---|---|---|
| committer | Matt Roper <matthew.d.roper@intel.com> | 2024-01-08 11:43:19 -0800 |
| commit | ddb5bade29de7a3e1e1ce42df33f4a98f8a9f323 (patch) | |
| tree | 253c1ba2693cd3b1778de2740fbdff625934b014 /drivers/gpu/drm/xe/regs/xe_gt_regs.h | |
| parent | be8755a0a81866bbf89bf3fb03ae180978b5a91f (diff) | |
| download | linux-stable-ddb5bade29de7a3e1e1ce42df33f4a98f8a9f323.tar.gz linux-stable-ddb5bade29de7a3e1e1ce42df33f4a98f8a9f323.tar.bz2 linux-stable-ddb5bade29de7a3e1e1ce42df33f4a98f8a9f323.zip | |
drm/xe/xe2: synchronise CS_CHICKEN1 with WMTP support
Recommendation is to read FUSE4 register to check if WMTP has been
enabled/disabled by HW. If enabled we don't need to do anything special,
however if disabled recommendation is to also disable the WMTP mode in
the FF_SLICE_CS_CHICKEN2 register, falling back to thread-group and
mid-batch preemption only. However on Linux, the per-context CS_CHICKEN1
is how userspace controls pre-emption, so instead use the default lrc to
disable WMTP using CS_CHICKEN1, if disabled by HW. Userspace is still
free to set CS_CHICKEN1 to whatever they want later.
v2: remove redundant version check and also add descriptive name(Matt)
v3: remove usage of REG_FIELD_GET(Matt)
Cc: Matt Roper <matthew.d.roper@intel.com>
Co-developed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20240104182615.21327-1-nirmoy.das@intel.com
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Diffstat (limited to 'drivers/gpu/drm/xe/regs/xe_gt_regs.h')
| -rw-r--r-- | drivers/gpu/drm/xe/regs/xe_gt_regs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/regs/xe_gt_regs.h b/drivers/gpu/drm/xe/regs/xe_gt_regs.h index 6aaaf1f63c72..6dfad86aaea6 100644 --- a/drivers/gpu/drm/xe/regs/xe_gt_regs.h +++ b/drivers/gpu/drm/xe/regs/xe_gt_regs.h @@ -146,6 +146,7 @@ /* Fuse readout registers for GT */ #define XEHP_FUSE4 XE_REG(0x9114) +#define CFEG_WMTP_DISABLE REG_BIT(20) #define CCS_EN_MASK REG_GENMASK(19, 16) #define GT_L3_EXC_MASK REG_GENMASK(6, 4) |