On Wed, Apr 20, 2016 at 03:23:10PM +0100, Robert Bragg wrote:
> +static int alloc_oa_buffer(struct drm_i915_private *dev_priv)
> +{
> + struct drm_i915_gem_object *bo;
> + int ret;
> +
> + BUG_ON(dev_priv->perf.oa.oa_buffer.obj);
> +
> + ret = i915_mutex_lock_interruptible(dev_priv->dev);
> + if (ret)
> + return ret;
> +
> + bo = i915_gem_alloc_object(dev_priv->dev, OA_BUFFER_SIZE);
> + if (bo == NULL) {
> + DRM_ERROR("Failed to allocate OA buffer\n");
> + ret = -ENOMEM;
> + goto unlock;
> + }
> + dev_priv->perf.oa.oa_buffer.obj = bo;
> +
> + ret = i915_gem_object_set_cache_level(bo, I915_CACHE_LLC);
> + if (ret)
> + goto err_unref;
> +
> + /* PreHSW required 512K alignment, HSW requires 16M */
> + ret = i915_gem_obj_ggtt_pin(bo, SZ_16M, 0);
> + if (ret)
> + goto err_unref;
> +
> + dev_priv->perf.oa.oa_buffer.gtt_offset = i915_gem_obj_ggtt_offset(bo);
> + dev_priv->perf.oa.oa_buffer.addr = vmap_oa_buffer(bo);
Now i915_gem_object_pin_map(bo) instead of manually vmapping it, and
i915_gem_object_unpin_map() to release.
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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