drm/i915: Create a global list of vms
After we plumb our code to support multiple address spaces (VMs), there are a few situations where we want to be able to traverse the list of all address spaces in the system. Cases like eviction, or error state collection are obvious example. v2: Delete the global link instead of the list head. While this in and of itself shouldn't be really be a problem, doing this allows us to WARN on an non-empty list, which is a problem. (Daniel) Signed-off-by: Ben Widawsky <ben@bwidawsk.net> Reviewed-by: Imre Deak <imre.deak@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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@ -1492,6 +1492,10 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
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i915_dump_device_info(dev_priv);
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INIT_LIST_HEAD(&dev_priv->vm_list);
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INIT_LIST_HEAD(&dev_priv->gtt.base.global_link);
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list_add(&dev_priv->gtt.base.global_link, &dev_priv->vm_list);
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if (i915_get_bridge_dev(dev)) {
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ret = -EIO;
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goto free_priv;
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@ -1758,6 +1762,8 @@ int i915_driver_unload(struct drm_device *dev)
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i915_free_hws(dev);
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}
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list_del(&dev_priv->gtt.base.global_link);
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WARN_ON(!list_empty(&dev_priv->vm_list));
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drm_mm_takedown(&dev_priv->gtt.base.mm);
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if (dev_priv->regs != NULL)
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pci_iounmap(dev->pdev, dev_priv->regs);
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@ -449,6 +449,7 @@ typedef uint32_t gen6_gtt_pte_t;
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struct i915_address_space {
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struct drm_mm mm;
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struct drm_device *dev;
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struct list_head global_link;
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unsigned long start; /* Start offset always 0 for dri2 */
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size_t total; /* size addr space maps (ex. 2GB for ggtt) */
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@ -1120,6 +1121,7 @@ typedef struct drm_i915_private {
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enum modeset_restore modeset_restore;
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struct mutex modeset_restore_lock;
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struct list_head vm_list; /* Global list of all address spaces */
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struct i915_gtt gtt; /* VMA representing the global address space */
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struct i915_gem_mm mm;
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