int
msm_gem_map_vma(struct msm_gem_address_space *aspace,
struct msm_gem_vma *vma, struct sg_table *sgt, int npages)
{
int ret;
spin_lock(&aspace->lock);
if (WARN_ON(drm_mm_node_allocated(&vma->node))) {
spin_unlock(&aspace->lock);
return 0;
}
ret = drm_mm_insert_node(&aspace->mm, &vma->node, npages);
spin_unlock(&aspace->lock);
if (ret)
return ret;
vma->iova = vma->node.start << PAGE_SHIFT;
if (aspace->mmu) {
unsigned size = npages << PAGE_SHIFT;
ret = aspace->mmu->funcs->map(aspace->mmu, vma->iova, sgt,
size, IOMMU_READ | IOMMU_WRITE);
}
/* Get a reference to the aspace to keep it around */
kref_get(&aspace->kref);
return ret;
}
bool i915_gem_valid_gtt_space(struct i915_vma *vma,
unsigned long cache_level)
{
struct drm_mm_node *gtt_space = &vma->node;
struct drm_mm_node *other;
/*
* On some machines we have to be careful when putting differing types
* of snoopable memory together to avoid the prefetcher crossing memory
* domains and dying. During vm initialisation, we decide whether or not
* these constraints apply and set the drm_mm.color_adjust
* appropriately.
*/
if (vma->vm->mm.color_adjust == NULL)
return true;
if (!drm_mm_node_allocated(gtt_space))
return true;
if (list_empty(>t_space->node_list))
return true;
other = list_entry(gtt_space->node_list.prev, struct drm_mm_node, node_list);
if (other->allocated && !other->hole_follows && other->color != cache_level)
return false;
other = list_entry(gtt_space->node_list.next, struct drm_mm_node, node_list);
if (other->allocated && !gtt_space->hole_follows && other->color != cache_level)
return false;
return true;
}
bool
i915_vma_misplaced(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
{
if (!drm_mm_node_allocated(&vma->node))
return false;
if (vma->node.size < size)
return true;
if (alignment && vma->node.start & (alignment - 1))
return true;
if (flags & PIN_MAPPABLE && !i915_vma_is_map_and_fenceable(vma))
return true;
if (flags & PIN_OFFSET_BIAS &&
vma->node.start < (flags & PIN_OFFSET_MASK))
return true;
if (flags & PIN_OFFSET_FIXED &&
vma->node.start != (flags & PIN_OFFSET_MASK))
return true;
return false;
}
static int intel_fbc_alloc_cfb(struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
struct intel_fbc *fbc = &dev_priv->fbc;
struct drm_mm_node *uninitialized_var(compressed_llb);
int size, fb_cpp, ret;
WARN_ON(drm_mm_node_allocated(&fbc->compressed_fb));
size = intel_fbc_calculate_cfb_size(dev_priv, &fbc->state_cache);
fb_cpp = drm_format_plane_cpp(fbc->state_cache.fb.pixel_format, 0);
ret = find_compression_threshold(dev_priv, &fbc->compressed_fb,
size, fb_cpp);
if (!ret)
goto err_llb;
else if (ret > 1) {
DRM_INFO("Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.\n");
}
fbc->threshold = ret;
if (INTEL_INFO(dev_priv)->gen >= 5)
I915_WRITE(ILK_DPFC_CB_BASE, fbc->compressed_fb.start);
else if (IS_GM45(dev_priv)) {
I915_WRITE(DPFC_CB_BASE, fbc->compressed_fb.start);
} else {
compressed_llb = kzalloc(sizeof(*compressed_llb), GFP_KERNEL);
if (!compressed_llb)
goto err_fb;
ret = i915_gem_stolen_insert_node(dev_priv, compressed_llb,
4096, 4096);
if (ret)
goto err_fb;
fbc->compressed_llb = compressed_llb;
I915_WRITE(FBC_CFB_BASE,
dev_priv->mm.stolen_base + fbc->compressed_fb.start);
I915_WRITE(FBC_LL_BASE,
dev_priv->mm.stolen_base + compressed_llb->start);
}
DRM_DEBUG_KMS("reserved %llu bytes of contiguous stolen space for FBC, threshold: %d\n",
fbc->compressed_fb.size, fbc->threshold);
return 0;
err_fb:
kfree(compressed_llb);
i915_gem_stolen_remove_node(dev_priv, &fbc->compressed_fb);
err_llb:
pr_info_once("drm: not enough stolen space for compressed buffer (need %d more bytes), disabling. Hint: you may be able to increase stolen memory size in the BIOS to avoid this.\n", size);
return -ENOSPC;
}
static void __intel_fbc_cleanup_cfb(struct drm_i915_private *dev_priv)
{
struct intel_fbc *fbc = &dev_priv->fbc;
if (drm_mm_node_allocated(&fbc->compressed_fb))
i915_gem_stolen_remove_node(dev_priv, &fbc->compressed_fb);
if (fbc->compressed_llb) {
i915_gem_stolen_remove_node(dev_priv, fbc->compressed_llb);
kfree(fbc->compressed_llb);
}
}
/**
* drm_vma_offset_remove() - Remove offset node from manager
* @mgr: Manager object
* @node: Node to be removed
*
* Remove a node from the offset manager. If the node wasn't added before, this
* does nothing. After this call returns, the offset and size will be 0 until a
* new offset is allocated via drm_vma_offset_add() again. Helper functions like
* drm_vma_node_start() and drm_vma_node_offset_addr() will return 0 if no
* offset is allocated.
*/
void drm_vma_offset_remove(struct drm_vma_offset_manager *mgr,
struct drm_vma_offset_node *node)
{
lockmgr(&mgr->vm_lock, LK_EXCLUSIVE);
if (drm_mm_node_allocated(&node->vm_node)) {
rb_erase(&node->vm_rb, &mgr->vm_addr_space_rb);
drm_mm_remove_node(&node->vm_node);
memset(&node->vm_node, 0, sizeof(node->vm_node));
}
lockmgr(&mgr->vm_lock, LK_RELEASE);
}
static void
i915_vma_retire(struct i915_gem_active *active, struct i915_request *rq)
{
const unsigned int idx = rq->engine->id;
struct i915_vma *vma =
container_of(active, struct i915_vma, last_read[idx]);
struct drm_i915_gem_object *obj = vma->obj;
GEM_BUG_ON(!i915_vma_has_active_engine(vma, idx));
i915_vma_clear_active(vma, idx);
if (i915_vma_is_active(vma))
return;
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
list_move_tail(&vma->vm_link, &vma->vm->inactive_list);
if (unlikely(i915_vma_is_closed(vma) && !i915_vma_is_pinned(vma)))
WARN_ON(i915_vma_unbind(vma));
GEM_BUG_ON(!i915_gem_object_is_active(obj));
if (--obj->active_count)
return;
/* Prune the shared fence arrays iff completely idle (inc. external) */
if (reservation_object_trylock(obj->resv)) {
if (reservation_object_test_signaled_rcu(obj->resv, true))
reservation_object_add_excl_fence(obj->resv, NULL);
reservation_object_unlock(obj->resv);
}
/* Bump our place on the bound list to keep it roughly in LRU order
* so that we don't steal from recently used but inactive objects
* (unless we are forced to ofc!)
*/
spin_lock(&rq->i915->mm.obj_lock);
if (obj->bind_count)
list_move_tail(&obj->mm.link, &rq->i915->mm.bound_list);
spin_unlock(&rq->i915->mm.obj_lock);
obj->mm.dirty = true; /* be paranoid */
if (i915_gem_object_has_active_reference(obj)) {
i915_gem_object_clear_active_reference(obj);
i915_gem_object_put(obj);
}
}
/**
* drm_vma_offset_add() - Add offset node to manager
* @mgr: Manager object
* @node: Node to be added
* @pages: Allocation size visible to user-space (in number of pages)
*
* Add a node to the offset-manager. If the node was already added, this does
* nothing and return 0. @pages is the size of the object given in number of
* pages.
* After this call succeeds, you can access the offset of the node until it
* is removed again.
*
* If this call fails, it is safe to retry the operation or call
* drm_vma_offset_remove(), anyway. However, no cleanup is required in that
* case.
*
* @pages is not required to be the same size as the underlying memory object
* that you want to map. It only limits the size that user-space can map into
* their address space.
*
* RETURNS:
* 0 on success, negative error code on failure.
*/
int drm_vma_offset_add(struct drm_vma_offset_manager *mgr,
struct drm_vma_offset_node *node, unsigned long pages)
{
int ret;
lockmgr(&mgr->vm_lock, LK_EXCLUSIVE);
if (drm_mm_node_allocated(&node->vm_node)) {
ret = 0;
goto out_unlock;
}
ret = drm_mm_insert_node(&mgr->vm_addr_space_mm, &node->vm_node,
pages, 0, DRM_MM_SEARCH_DEFAULT);
if (ret)
goto out_unlock;
_drm_vma_offset_add_rb(mgr, node);
out_unlock:
lockmgr(&mgr->vm_lock, LK_RELEASE);
return ret;
}
struct drm_i915_gem_object *
i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *dev_priv,
resource_size_t stolen_offset,
resource_size_t gtt_offset,
resource_size_t size)
{
struct i915_ggtt *ggtt = &dev_priv->ggtt;
struct drm_i915_gem_object *obj;
struct drm_mm_node *stolen;
struct i915_vma *vma;
int ret;
if (!drm_mm_initialized(&dev_priv->mm.stolen))
return NULL;
lockdep_assert_held(&dev_priv->drm.struct_mutex);
DRM_DEBUG_DRIVER("creating preallocated stolen object: stolen_offset=%pa, gtt_offset=%pa, size=%pa\n",
&stolen_offset, >t_offset, &size);
/* KISS and expect everything to be page-aligned */
if (WARN_ON(size == 0) ||
WARN_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE)) ||
WARN_ON(!IS_ALIGNED(stolen_offset, I915_GTT_MIN_ALIGNMENT)))
return NULL;
stolen = kzalloc(sizeof(*stolen), GFP_KERNEL);
if (!stolen)
return NULL;
stolen->start = stolen_offset;
stolen->size = size;
mutex_lock(&dev_priv->mm.stolen_lock);
ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen);
mutex_unlock(&dev_priv->mm.stolen_lock);
if (ret) {
DRM_DEBUG_DRIVER("failed to allocate stolen space\n");
kfree(stolen);
return NULL;
}
obj = _i915_gem_object_create_stolen(dev_priv, stolen);
if (obj == NULL) {
DRM_DEBUG_DRIVER("failed to allocate stolen object\n");
i915_gem_stolen_remove_node(dev_priv, stolen);
kfree(stolen);
return NULL;
}
/* Some objects just need physical mem from stolen space */
if (gtt_offset == I915_GTT_OFFSET_NONE)
return obj;
ret = i915_gem_object_pin_pages(obj);
if (ret)
goto err;
vma = i915_vma_instance(obj, &ggtt->vm, NULL);
if (IS_ERR(vma)) {
ret = PTR_ERR(vma);
goto err_pages;
}
/* To simplify the initialisation sequence between KMS and GTT,
* we allow construction of the stolen object prior to
* setting up the GTT space. The actual reservation will occur
* later.
*/
ret = i915_gem_gtt_reserve(&ggtt->vm, &vma->node,
size, gtt_offset, obj->cache_level,
0);
if (ret) {
DRM_DEBUG_DRIVER("failed to allocate stolen GTT space\n");
goto err_pages;
}
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
vma->pages = obj->mm.pages;
vma->flags |= I915_VMA_GLOBAL_BIND;
__i915_vma_set_map_and_fenceable(vma);
mutex_lock(&ggtt->vm.mutex);
list_move_tail(&vma->vm_link, &ggtt->vm.bound_list);
mutex_unlock(&ggtt->vm.mutex);
spin_lock(&dev_priv->mm.obj_lock);
list_move_tail(&obj->mm.link, &dev_priv->mm.bound_list);
obj->bind_count++;
spin_unlock(&dev_priv->mm.obj_lock);
return obj;
err_pages:
i915_gem_object_unpin_pages(obj);
err:
i915_gem_object_put(obj);
return NULL;
}
/**
* i915_vma_insert - finds a slot for the vma in its address space
* @vma: the vma
* @size: requested size in bytes (can be larger than the VMA)
* @alignment: required alignment
* @flags: mask of PIN_* flags to use
*
* First we try to allocate some free space that meets the requirements for
* the VMA. Failiing that, if the flags permit, it will evict an old VMA,
* preferrably the oldest idle entry to make room for the new VMA.
*
* Returns:
* 0 on success, negative error code otherwise.
*/
static int
i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
{
struct drm_i915_private *dev_priv = to_i915(vma->vm->dev);
struct drm_i915_gem_object *obj = vma->obj;
u64 start, end;
int ret;
GEM_BUG_ON(vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND));
GEM_BUG_ON(drm_mm_node_allocated(&vma->node));
size = max(size, vma->size);
if (flags & PIN_MAPPABLE)
size = i915_gem_get_ggtt_size(dev_priv, size,
i915_gem_object_get_tiling(obj));
alignment = max(max(alignment, vma->display_alignment),
i915_gem_get_ggtt_alignment(dev_priv, size,
i915_gem_object_get_tiling(obj),
flags & PIN_MAPPABLE));
start = flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0;
end = vma->vm->total;
if (flags & PIN_MAPPABLE)
end = min_t(u64, end, dev_priv->ggtt.mappable_end);
if (flags & PIN_ZONE_4G)
end = min_t(u64, end, (1ULL << 32) - PAGE_SIZE);
/* If binding the object/GGTT view requires more space than the entire
* aperture has, reject it early before evicting everything in a vain
* attempt to find space.
*/
if (size > end) {
DRM_DEBUG("Attempting to bind an object larger than the aperture: request=%llu [object=%zd] > %s aperture=%llu\n",
size, obj->base.size,
flags & PIN_MAPPABLE ? "mappable" : "total",
end);
return -E2BIG;
}
ret = i915_gem_object_pin_pages(obj);
if (ret)
return ret;
if (flags & PIN_OFFSET_FIXED) {
u64 offset = flags & PIN_OFFSET_MASK;
if (offset & (alignment - 1) || offset > end - size) {
ret = -EINVAL;
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);
if (ret == 0)
ret = drm_mm_reserve_node(&vma->vm->mm, &vma->node);
if (ret)
goto err_unpin;
}
} else {
u32 search_flag, alloc_flag;
if (flags & PIN_HIGH) {
search_flag = DRM_MM_SEARCH_BELOW;
alloc_flag = DRM_MM_CREATE_TOP;
} else {
search_flag = DRM_MM_SEARCH_DEFAULT;
alloc_flag = DRM_MM_CREATE_DEFAULT;
}
/* We only allocate in PAGE_SIZE/GTT_PAGE_SIZE (4096) chunks,
* so we know that we always have a minimum alignment of 4096.
* The drm_mm range manager is optimised to return results
* with zero alignment, so where possible use the optimal
* path.
*/
if (alignment <= 4096)
alignment = 0;
search_free:
ret = drm_mm_insert_node_in_range_generic(&vma->vm->mm,
&vma->node,
size, alignment,
obj->cache_level,
start, end,
search_flag,
alloc_flag);
if (ret) {
ret = i915_gem_evict_something(vma->vm, size, alignment,
obj->cache_level,
start, end,
flags);
if (ret == 0)
goto search_free;
goto err_unpin;
}
GEM_BUG_ON(vma->node.start < start);
GEM_BUG_ON(vma->node.start + vma->node.size > end);
}
GEM_BUG_ON(!i915_gem_valid_gtt_space(vma, obj->cache_level));
list_move_tail(&obj->global_link, &dev_priv->mm.bound_list);
list_move_tail(&vma->vm_link, &vma->vm->inactive_list);
obj->bind_count++;
GEM_BUG_ON(atomic_read(&obj->mm.pages_pin_count) < obj->bind_count);
return 0;
err_unpin:
i915_gem_object_unpin_pages(obj);
return ret;
}
