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drm/i915: Cache ringbuffer GTT VMA

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Purpose is to avoid calling i915_gem_obj_ggtt_offset from the
interrupt context without the big lock held.

v2: Renamed gtt_start to gtt_offset. (Daniel Vetter)
v3: Cache the VMA instead of address. (Chris Wilson)

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1452870629-13830-2-git-send-email-tvrtko.ursulin@linux.intel.com
This commit is contained in:
Tvrtko Ursulin
2016-01-15 15:10:28 +00:00
parent ca82580c9c
commit 0eb973d31d
3 changed files with 5 additions and 2 deletions
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3
drivers/gpu/drm/i915/intel_ringbuffer.c
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@@ -1999,6 +1999,7 @@ void intel_unpin_ringbuffer_obj(struct intel_ringbuffer *ringbuf)
else
iounmap(ringbuf->virtual_start);
ringbuf->virtual_start = NULL;
ringbuf->vma = NULL;
i915_gem_object_ggtt_unpin(ringbuf->obj);
}
@@ -2065,6 +2066,8 @@ int intel_pin_and_map_ringbuffer_obj(struct drm_device *dev,
}
}
ringbuf->vma = i915_gem_obj_to_ggtt(obj);
return 0;
}