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| author |   Chris Wilson <chris@chris-wilson.co.uk> | 2017-09-06 20:24:24 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-09-07 10:41:19 +0100 |
| commit | df0700e53047662c167836bd6fdeea55d5d8dcfa (patch) | |
| tree | 49b7a7b78bc83e091a1453c6df92b127f6f5118f /drivers/gpu/drm/i915/intel_device_info.c | |
| parent | drm/i915: Update DRIVER_DATE to 20170907 (diff) | |
| download | linux-dev-df0700e53047662c167836bd6fdeea55d5d8dcfa.tar.xz linux-dev-df0700e53047662c167836bd6fdeea55d5d8dcfa.zip | |
drm/i915: Disable snooping (userptr, set-cache-level) on gen4
The original gen4 has an issue where writes (both render and blt) into
snoopable pages are lost. We've previously worked around this in
userspace (ddx, igt) by simply not requesting snoopable buffers, but upon
rediscovering this problem for a third time, make the kernel reject such
requests with -ENODEV.
This disables snooping on userspace buffers for i965g and i965gm (original
gen4) machines.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170906192424.26970-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/intel_device_info.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_device_info.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c index b17f7045c8f8..43831b09b47a 100644 --- a/drivers/gpu/drm/i915/intel_device_info.c +++ b/drivers/gpu/drm/i915/intel_device_info.c @@ -412,8 +412,6 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv) else if (INTEL_INFO(dev_priv)->gen >= 9) gen9_sseu_info_init(dev_priv); - WARN_ON(info->has_snoop != !info->has_llc); - DRM_DEBUG_DRIVER("slice mask: %04x\n", info->sseu.slice_mask); DRM_DEBUG_DRIVER("slice total: %u\n", hweight8(info->sseu.slice_mask)); DRM_DEBUG_DRIVER("subslice total: %u\n", |