drm/i915: Use indirect ctx bb to mend CMD_BUF_CCTL

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Use indirect ctx bb to load cmd buffer control value
from context image to avoid corruption.

v2: add to lrc layout (Chris)
v3: end to a cacheline (Chris)
v4: add to lrc fixed (Chris)
v5: value in offset+1

Testcase: igt/i915_selftest/gt_lrc
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200424230632.30333-1-mika.kuoppala@linux.intel.com

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Mika Kuoppala 2020-04-25 02:06:32 +03:00 • committed by Chris Wilson

parent 1dd47b54ba

commit b8a1181122

3 changed files with 115 additions and 3 deletions

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112

drivers/gpu/drm/i915/gt/intel_lrc.c

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5

drivers/gpu/drm/i915/gt/selftest_lrc.c

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1

drivers/gpu/drm/i915/i915_reg.h

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