From: Chris Wilson Date: Thu, 18 Feb 2010 10:24:56 +0000 (+0000) Subject: drm/i915: Record batch buffer following GPU error X-Git-Tag: v2.6.34-rc1~209^2~11^2~24^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9df30794f609d9412f14cfd0eb7b45dd64d0b14e;p=pandora-kernel.git drm/i915: Record batch buffer following GPU error In order to improve our diagnostic capabilities following a GPU hang and subsequent reset, we need to record the batch buffer that triggered the error. We assume that the current batch buffer, plus a few details about what else is on the active list, will be sufficient -- at the very least an improvement over nothing. The extra information is stored in /debug/dri/.../i915_error_state following an error, and may be decoded using intel_gpu_tools/tools/intel_error_decode. v2: Avoid excessive work under spinlocks. v3: Include ringbuffer for later analysis. v4: Use kunmap correctly and record more buffer state. v5: Search ringbuffer for current batch buffer v6: Use a work fn for the impossible IRQ error case. v7: Avoid non-atomic paths whilst in IRQ context. Signed-off-by: Chris Wilson Signed-off-by: Eric Anholt --- Reading git-diff-tree failed