diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_evict.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_evict.c | 93 |
1 files changed, 66 insertions, 27 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_evict.c b/drivers/gpu/drm/i915/i915_gem_evict.c index 8f3adc7d0dc..bbf4b12d842 100644 --- a/drivers/gpu/drm/i915/i915_gem_evict.c +++ b/drivers/gpu/drm/i915/i915_gem_evict.c @@ -27,14 +27,16 @@ */ #include <drm/drmP.h> -#include "i915_drv.h" #include <drm/i915_drm.h> + +#include "i915_drv.h" +#include "intel_drv.h" #include "i915_trace.h" static bool mark_free(struct i915_vma *vma, struct list_head *unwind) { - if (vma->obj->pin_count) + if (vma->pin_count) return false; if (WARN_ON(!list_empty(&vma->exec_list))) @@ -44,17 +46,37 @@ mark_free(struct i915_vma *vma, struct list_head *unwind) return drm_mm_scan_add_block(&vma->node); } +/** + * i915_gem_evict_something - Evict vmas to make room for binding a new one + * @dev: drm_device + * @vm: address space to evict from + * @size: size of the desired free space + * @alignment: alignment constraint of the desired free space + * @cache_level: cache_level for the desired space + * @mappable: whether the free space must be mappable + * @nonblocking: whether evicting active objects is allowed or not + * + * This function will try to evict vmas until a free space satisfying the + * requirements is found. Callers must check first whether any such hole exists + * already before calling this function. + * + * This function is used by the object/vma binding code. + * + * To clarify: This is for freeing up virtual address space, not for freeing + * memory in e.g. the shrinker. + */ int i915_gem_evict_something(struct drm_device *dev, struct i915_address_space *vm, int min_size, unsigned alignment, unsigned cache_level, - bool mappable, bool nonblocking) + unsigned long start, unsigned long end, + unsigned flags) { - drm_i915_private_t *dev_priv = dev->dev_private; struct list_head eviction_list, unwind_list; struct i915_vma *vma; int ret = 0; + int pass = 0; - trace_i915_gem_evict(dev, min_size, alignment, mappable); + trace_i915_gem_evict(dev, min_size, alignment, flags); /* * The goal is to evict objects and amalgamate space in LRU order. @@ -80,11 +102,10 @@ i915_gem_evict_something(struct drm_device *dev, struct i915_address_space *vm, */ INIT_LIST_HEAD(&unwind_list); - if (mappable) { - BUG_ON(!i915_is_ggtt(vm)); + if (start != 0 || end != vm->total) { drm_mm_init_scan_with_range(&vm->mm, min_size, - alignment, cache_level, 0, - dev_priv->gtt.mappable_end); + alignment, cache_level, + start, end); } else drm_mm_init_scan(&vm->mm, min_size, alignment, cache_level); @@ -95,7 +116,7 @@ search_again: goto found; } - if (nonblocking) + if (flags & PIN_NONBLOCK) goto none; /* Now merge in the soon-to-be-expired objects... */ @@ -119,14 +140,24 @@ none: /* Can we unpin some objects such as idle hw contents, * or pending flips? */ - ret = nonblocking ? -ENOSPC : i915_gpu_idle(dev); - if (ret) - return ret; + if (flags & PIN_NONBLOCK) + return -ENOSPC; /* Only idle the GPU and repeat the search once */ - i915_gem_retire_requests(dev); - nonblocking = true; - goto search_again; + if (pass++ == 0) { + ret = i915_gpu_idle(dev); + if (ret) + return ret; + + i915_gem_retire_requests(dev); + goto search_again; + } + + /* If we still have pending pageflip completions, drop + * back to userspace to give our workqueues time to + * acquire our locks and unpin the old scanouts. + */ + return intel_has_pending_fb_unpin(dev) ? -EAGAIN : -ENOSPC; found: /* drm_mm doesn't allow any other other operations while @@ -164,19 +195,19 @@ found: } /** - * i915_gem_evict_vm - Try to free up VM space + * i915_gem_evict_vm - Evict all idle vmas from a vm * - * @vm: Address space to evict from + * @vm: Address space to cleanse * @do_idle: Boolean directing whether to idle first. * - * VM eviction is about freeing up virtual address space. If one wants fine - * grained eviction, they should see evict something for more details. In terms - * of freeing up actual system memory, this function may not accomplish the - * desired result. An object may be shared in multiple address space, and this - * function will not assert those objects be freed. + * This function evicts all idles vmas from a vm. If all unpinned vmas should be + * evicted the @do_idle needs to be set to true. + * + * This is used by the execbuf code as a last-ditch effort to defragment the + * address space. * - * Using do_idle will result in a more complete eviction because it retires, and - * inactivates current BOs. + * To clarify: This is for freeing up virtual address space, not for freeing + * memory in e.g. the shrinker. */ int i915_gem_evict_vm(struct i915_address_space *vm, bool do_idle) { @@ -194,16 +225,24 @@ int i915_gem_evict_vm(struct i915_address_space *vm, bool do_idle) } list_for_each_entry_safe(vma, next, &vm->inactive_list, mm_list) - if (vma->obj->pin_count == 0) + if (vma->pin_count == 0) WARN_ON(i915_vma_unbind(vma)); return 0; } +/** + * i915_gem_evict_everything - Try to evict all objects + * @dev: Device to evict objects for + * + * This functions tries to evict all gem objects from all address spaces. Used + * by the shrinker as a last-ditch effort and for suspend, before releasing the + * backing storage of all unbound objects. + */ int i915_gem_evict_everything(struct drm_device *dev) { - drm_i915_private_t *dev_priv = dev->dev_private; + struct drm_i915_private *dev_priv = dev->dev_private; struct i915_address_space *vm; bool lists_empty = true; int ret; |