unsigned cache_level,
u64 start, u64 end,
unsigned flags);
-int __must_check i915_gem_evict_for_vma(struct i915_vma *vma,
- unsigned int flags);
+int __must_check i915_gem_evict_for_node(struct i915_address_space *vm,
+ struct drm_mm_node *node,
+ unsigned int flags);
int i915_gem_evict_vm(struct i915_address_space *vm, bool do_idle);
/* belongs in i915_gem_gtt.h */
/**
* i915_gem_evict_for_vma - Evict vmas to make room for binding a new one
- * @target: address space and range to evict for
+ * @vm: address space to evict from
+ * @target: range (and color) to evict for
* @flags: additional flags to control the eviction algorithm
*
* This function will try to evict vmas that overlap the target node.
* To clarify: This is for freeing up virtual address space, not for freeing
* memory in e.g. the shrinker.
*/
-int i915_gem_evict_for_vma(struct i915_vma *target, unsigned int flags)
+int i915_gem_evict_for_node(struct i915_address_space *vm,
+ struct drm_mm_node *target,
+ unsigned int flags)
{
LIST_HEAD(eviction_list);
struct drm_mm_node *node;
- u64 start = target->node.start;
- u64 end = start + target->node.size;
+ u64 start = target->start;
+ u64 end = start + target->size;
struct i915_vma *vma, *next;
bool check_color;
int ret = 0;
- lockdep_assert_held(&target->vm->i915->drm.struct_mutex);
- trace_i915_gem_evict_vma(target, flags);
+ lockdep_assert_held(&vm->i915->drm.struct_mutex);
+ trace_i915_gem_evict_node(vm, target, flags);
/* Retire before we search the active list. Although we have
* reasonable accuracy in our retirement lists, we may have
* retiring.
*/
if (!(flags & PIN_NONBLOCK))
- i915_gem_retire_requests(target->vm->i915);
+ i915_gem_retire_requests(vm->i915);
- check_color = target->vm->mm.color_adjust;
+ check_color = vm->mm.color_adjust;
if (check_color) {
/* Expand search to cover neighbouring guard pages (or lack!) */
- if (start > target->vm->start)
+ if (start > vm->start)
start -= I915_GTT_PAGE_SIZE;
- if (end < target->vm->start + target->vm->total)
+ if (end < vm->start + vm->total)
end += I915_GTT_PAGE_SIZE;
}
- drm_mm_for_each_node_in_range(node, &target->vm->mm, start, end) {
+ drm_mm_for_each_node_in_range(node, &vm->mm, start, end) {
/* If we find any non-objects (!vma), we cannot evict them */
if (node->color == I915_COLOR_UNEVICTABLE) {
ret = -ENOSPC;
* those as well to make room for our guard pages.
*/
if (check_color) {
- if (vma->node.start + vma->node.size == target->node.start) {
- if (vma->node.color == target->node.color)
+ if (vma->node.start + vma->node.size == node->start) {
+ if (vma->node.color == node->color)
continue;
}
- if (vma->node.start == target->node.start + target->node.size) {
- if (vma->node.color == target->node.color)
+ if (vma->node.start == node->start + node->size) {
+ if (vma->node.color == node->color)
continue;
}
}
}
/**
+ * i915_gem_gtt_reserve - reserve a node in an address_space (GTT)
+ * @vm - the &struct i915_address_space
+ * @node - the &struct drm_mm_node (typically i915_vma.mode)
+ * @size - how much space to allocate inside the GTT,
+ * must be #I915_GTT_PAGE_SIZE aligned
+ * @offset - where to insert inside the GTT,
+ * must be #I915_GTT_MIN_ALIGNMENT aligned, and the node
+ * (@offset + @size) must fit within the address space
+ * @color - color to apply to node, if this node is not from a VMA,
+ * color must be #I915_COLOR_UNEVICTABLE
+ * @flags - control search and eviction behaviour
+ *
+ * i915_gem_gtt_reserve() tries to insert the @node at the exact @offset inside
+ * the address space (using @size and @color). If the @node does not fit, it
+ * tries to evict any overlapping nodes from the GTT, including any
+ * neighbouring nodes if the colors do not match (to ensure guard pages between
+ * differing domains). See i915_gem_evict_for_node() for the gory details
+ * on the eviction algorithm. #PIN_NONBLOCK may used to prevent waiting on
+ * evicting active overlapping objects, and any overlapping node that is pinned
+ * or marked as unevictable will also result in failure.
+ *
+ * Returns: 0 on success, -ENOSPC if no suitable hole is found, -EINTR if
+ * asked to wait for eviction and interrupted.
+ */
+int i915_gem_gtt_reserve(struct i915_address_space *vm,
+ struct drm_mm_node *node,
+ u64 size, u64 offset, unsigned long color,
+ unsigned int flags)
+{
+ int err;
+
+ GEM_BUG_ON(!size);
+ GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE));
+ GEM_BUG_ON(!IS_ALIGNED(offset, I915_GTT_MIN_ALIGNMENT));
+ GEM_BUG_ON(range_overflows(offset, size, vm->total));
+
+ node->size = size;
+ node->start = offset;
+ node->color = color;
+
+ err = drm_mm_reserve_node(&vm->mm, node);
+ if (err != -ENOSPC)
+ return err;
+
+ err = i915_gem_evict_for_node(vm, node, flags);
+ if (err == 0)
+ err = drm_mm_reserve_node(&vm->mm, node);
+
+ return err;
+}
+
+/**
* i915_gem_gtt_insert - insert a node into an address_space (GTT)
* @vm - the &struct i915_address_space
* @node - the &struct drm_mm_node (typically i915_vma.node)
void i915_gem_gtt_finish_pages(struct drm_i915_gem_object *obj,
struct sg_table *pages);
+int i915_gem_gtt_reserve(struct i915_address_space *vm,
+ struct drm_mm_node *node,
+ u64 size, u64 offset, unsigned long color,
+ unsigned int flags);
+
int i915_gem_gtt_insert(struct i915_address_space *vm,
struct drm_mm_node *node,
u64 size, u64 alignment, unsigned long color,
* setting up the GTT space. The actual reservation will occur
* later.
*/
- vma->node.start = gtt_offset;
- vma->node.size = size;
-
- ret = drm_mm_reserve_node(&ggtt->base.mm, &vma->node);
+ ret = i915_gem_gtt_reserve(&ggtt->base, &vma->node,
+ size, gtt_offset, obj->cache_level,
+ 0);
if (ret) {
DRM_DEBUG_KMS("failed to allocate stolen GTT space\n");
goto err_pages;
TP_printk("dev=%d, vm=%p", __entry->dev, __entry->vm)
);
-TRACE_EVENT(i915_gem_evict_vma,
- TP_PROTO(struct i915_vma *vma, unsigned int flags),
- TP_ARGS(vma, flags),
+TRACE_EVENT(i915_gem_evict_node,
+ TP_PROTO(struct i915_address_space *vm, struct drm_mm_node *node, unsigned int flags),
+ TP_ARGS(vm, node, flags),
TP_STRUCT__entry(
__field(u32, dev)
),
TP_fast_assign(
- __entry->dev = vma->vm->i915->drm.primary->index;
- __entry->vm = vma->vm;
- __entry->start = vma->node.start;
- __entry->size = vma->node.size;
- __entry->color = vma->node.color;
+ __entry->dev = vm->i915->drm.primary->index;
+ __entry->vm = vm;
+ __entry->start = node->start;
+ __entry->size = node->size;
+ __entry->color = node->color;
__entry->flags = flags;
),
memset(&bl_info, 0, sizeof(bl_info));
}
-static int vgt_balloon_space(struct drm_mm *mm,
+static int vgt_balloon_space(struct i915_ggtt *ggtt,
struct drm_mm_node *node,
unsigned long start, unsigned long end)
{
unsigned long size = end - start;
- if (start == end)
+ if (start <= end)
return -EINVAL;
DRM_INFO("balloon space: range [ 0x%lx - 0x%lx ] %lu KiB.\n",
start, end, size / 1024);
-
- node->start = start;
- node->size = size;
-
- return drm_mm_reserve_node(mm, node);
+ return i915_gem_gtt_reserve(&ggtt->base, node,
+ size, start, I915_COLOR_UNEVICTABLE,
+ 0);
}
/**
/* Unmappable graphic memory ballooning */
if (unmappable_base > ggtt->mappable_end) {
- ret = vgt_balloon_space(&ggtt->base.mm,
- &bl_info.space[2],
- ggtt->mappable_end,
- unmappable_base);
+ ret = vgt_balloon_space(ggtt, &bl_info.space[2],
+ ggtt->mappable_end, unmappable_base);
if (ret)
goto err;
* because it is reserved to the guard page.
*/
if (unmappable_end < ggtt_end - PAGE_SIZE) {
- ret = vgt_balloon_space(&ggtt->base.mm,
- &bl_info.space[3],
- unmappable_end,
- ggtt_end - PAGE_SIZE);
+ ret = vgt_balloon_space(ggtt, &bl_info.space[3],
+ unmappable_end, ggtt_end - PAGE_SIZE);
if (ret)
goto err;
}
/* Mappable graphic memory ballooning */
if (mappable_base > ggtt->base.start) {
- ret = vgt_balloon_space(&ggtt->base.mm,
- &bl_info.space[0],
+ ret = vgt_balloon_space(ggtt, &bl_info.space[0],
ggtt->base.start, mappable_base);
if (ret)
}
if (mappable_end < ggtt->mappable_end) {
- ret = vgt_balloon_space(&ggtt->base.mm,
- &bl_info.space[1],
- mappable_end,
- ggtt->mappable_end);
+ ret = vgt_balloon_space(ggtt, &bl_info.space[1],
+ mappable_end, ggtt->mappable_end);
if (ret)
goto err;
goto err_unpin;
}
- vma->node.start = offset;
- vma->node.size = size;
- vma->node.color = obj->cache_level;
- ret = drm_mm_reserve_node(&vma->vm->mm, &vma->node);
- if (ret) {
- ret = i915_gem_evict_for_vma(vma, flags);
- if (ret == 0)
- ret = drm_mm_reserve_node(&vma->vm->mm, &vma->node);
- if (ret)
- goto err_unpin;
- }
+ ret = i915_gem_gtt_reserve(vma->vm, &vma->node,
+ size, offset, obj->cache_level,
+ flags);
+ if (ret)
+ goto err_unpin;
} else {
ret = i915_gem_gtt_insert(vma->vm, &vma->node,
size, alignment, obj->cache_level,
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