static struct drm_i915_gem_object *
_i915_gem_object_create_stolen(struct drm_i915_private *dev_priv,
struct drm_mm_node *stolen)
{
struct drm_i915_gem_object *obj;
unsigned int cache_level;
obj = i915_gem_object_alloc(dev_priv);
if (obj == NULL)
return NULL;
drm_gem_private_object_init(&dev_priv->drm, &obj->base, stolen->size);
i915_gem_object_init(obj, &i915_gem_object_stolen_ops);
obj->stolen = stolen;
obj->read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT;
cache_level = HAS_LLC(dev_priv) ? I915_CACHE_LLC : I915_CACHE_NONE;
i915_gem_object_set_cache_coherency(obj, cache_level);
if (i915_gem_object_pin_pages(obj))
goto cleanup;
return obj;
cleanup:
i915_gem_object_free(obj);
return NULL;
}
static struct drm_i915_gem_object *
_i915_gem_object_create_stolen(struct drm_device *dev,
struct drm_mm_node *stolen)
{
struct drm_i915_gem_object *obj;
obj = i915_gem_object_alloc(dev);
if (obj == NULL)
return NULL;
drm_gem_private_object_init(dev, &obj->base, stolen->size);
i915_gem_object_init(obj, &i915_gem_object_stolen_ops);
obj->pages = i915_pages_create_for_stolen(dev,
stolen->start, stolen->size);
if (obj->pages == NULL)
goto cleanup;
obj->has_dma_mapping = true;
i915_gem_object_pin_pages(obj);
obj->stolen = stolen;
obj->base.read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT;
obj->cache_level = HAS_LLC(dev) ? I915_CACHE_LLC : I915_CACHE_NONE;
return obj;
cleanup:
i915_gem_object_free(obj);
return NULL;
}
static struct drm_i915_gem_object *
_kos_fb_object_create(struct drm_device *dev,
struct drm_mm_node *fb_node)
{
struct drm_i915_gem_object *obj;
obj = i915_gem_object_alloc(dev);
if (obj == NULL)
return NULL;
drm_gem_private_object_init(dev, &obj->base, fb_node->size);
i915_gem_object_init(obj, &kos_fb_object_ops);
obj->pages = i915_pages_create_for_fb(dev,
fb_node->start, fb_node->size);
if (obj->pages == NULL)
goto cleanup;
obj->has_dma_mapping = true;
i915_gem_object_pin_pages(obj);
obj->stolen = fb_node;
obj->base.read_domains = I915_GEM_DOMAIN_GTT;
obj->cache_level = I915_CACHE_NONE;
obj->tiling_mode = I915_TILING_X;
return obj;
cleanup:
i915_gem_object_free(obj);
return NULL;
}
static struct sg_table *i915_gem_map_dma_buf(struct dma_buf_attachment *attachment,
enum dma_data_direction dir)
{
struct drm_i915_gem_object *obj = dma_buf_to_obj(attachment->dmabuf);
struct sg_table *st;
struct scatterlist *src, *dst;
int ret, i;
ret = i915_mutex_lock_interruptible(obj->base.dev);
if (ret)
goto err;
ret = i915_gem_object_get_pages(obj);
if (ret)
goto err_unlock;
i915_gem_object_pin_pages(obj);
/* Copy sg so that we make an independent mapping */
st = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
if (st == NULL) {
ret = -ENOMEM;
goto err_unpin;
}
ret = sg_alloc_table(st, obj->pages->nents, GFP_KERNEL);
if (ret)
goto err_free;
src = obj->pages->sgl;
dst = st->sgl;
for (i = 0; i < obj->pages->nents; i++) {
sg_set_page(dst, sg_page(src), src->length, 0);
dst = sg_next(dst);
src = sg_next(src);
}
if (!dma_map_sg(attachment->dev, st->sgl, st->nents, dir)) {
ret =-ENOMEM;
goto err_free_sg;
}
mutex_unlock(&obj->base.dev->struct_mutex);
return st;
err_free_sg:
sg_free_table(st);
err_free:
kfree(st);
err_unpin:
i915_gem_object_unpin_pages(obj);
err_unlock:
mutex_unlock(&obj->base.dev->struct_mutex);
err:
return ERR_PTR(ret);
}
/**
* i915_gem_batch_pool_get() - allocate a buffer from the pool
* @pool: the batch buffer pool
* @size: the minimum desired size of the returned buffer
*
* Returns an inactive buffer from @pool with at least @size bytes,
* with the pages pinned. The caller must i915_gem_object_unpin_pages()
* on the returned object.
*
* Note: Callers must hold the struct_mutex
*
* Return: the buffer object or an error pointer
*/
struct drm_i915_gem_object *
i915_gem_batch_pool_get(struct i915_gem_batch_pool *pool,
size_t size)
{
struct drm_i915_gem_object *obj = NULL;
struct drm_i915_gem_object *tmp, *next;
struct list_head *list;
int n;
WARN_ON(!mutex_is_locked(&pool->dev->struct_mutex));
/* Compute a power-of-two bucket, but throw everything greater than
* 16KiB into the same bucket: i.e. the the buckets hold objects of
* (1 page, 2 pages, 4 pages, 8+ pages).
*/
n = fls(size >> PAGE_SHIFT) - 1;
if (n >= ARRAY_SIZE(pool->cache_list))
n = ARRAY_SIZE(pool->cache_list) - 1;
list = &pool->cache_list[n];
list_for_each_entry_safe(tmp, next, list, batch_pool_link) {
/* The batches are strictly LRU ordered */
if (tmp->active)
break;
/* While we're looping, do some clean up */
if (tmp->madv == __I915_MADV_PURGED) {
list_del(&tmp->batch_pool_link);
drm_gem_object_unreference(&tmp->base);
continue;
}
if (tmp->base.size >= size) {
obj = tmp;
break;
}
}
if (obj == NULL) {
int ret;
obj = i915_gem_alloc_object(pool->dev, size);
if (obj == NULL)
return ERR_PTR(-ENOMEM);
ret = i915_gem_object_get_pages(obj);
if (ret)
return ERR_PTR(ret);
obj->madv = I915_MADV_DONTNEED;
}
list_move_tail(&obj->batch_pool_link, list);
i915_gem_object_pin_pages(obj);
return obj;
}
static struct sg_table *i915_gem_map_dma_buf(struct dma_buf_attachment *attachment,
enum dma_data_direction dir)
{
struct drm_i915_gem_object *obj = attachment->dmabuf->priv;
struct sg_table *st;
struct scatterlist *src, *dst;
int ret, i;
ret = i915_mutex_lock_interruptible(obj->base.dev);
if (ret)
return ERR_PTR(ret);
ret = i915_gem_object_get_pages(obj);
if (ret) {
st = ERR_PTR(ret);
goto out;
}
/* Copy sg so that we make an independent mapping */
st = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
if (st == NULL) {
st = ERR_PTR(-ENOMEM);
goto out;
}
ret = sg_alloc_table(st, obj->pages->nents, GFP_KERNEL);
if (ret) {
kfree(st);
st = ERR_PTR(ret);
goto out;
}
src = obj->pages->sgl;
dst = st->sgl;
for (i = 0; i < obj->pages->nents; i++) {
sg_set_page(dst, sg_page(src), PAGE_SIZE, 0);
dst = sg_next(dst);
src = sg_next(src);
}
if (!dma_map_sg(attachment->dev, st->sgl, st->nents, dir)) {
sg_free_table(st);
kfree(st);
st = ERR_PTR(-ENOMEM);
goto out;
}
i915_gem_object_pin_pages(obj);
out:
mutex_unlock(&obj->base.dev->struct_mutex);
return st;
}
/**
* i915_gem_batch_pool_get() - allocate a buffer from the pool
* @pool: the batch buffer pool
* @size: the minimum desired size of the returned buffer
*
* Returns an inactive buffer from @pool with at least @size bytes,
* with the pages pinned. The caller must i915_gem_object_unpin_pages()
* on the returned object.
*
* Note: Callers must hold the struct_mutex
*
* Return: the buffer object or an error pointer
*/
struct drm_i915_gem_object *
i915_gem_batch_pool_get(struct i915_gem_batch_pool *pool,
size_t size)
{
struct drm_i915_gem_object *obj = NULL;
struct drm_i915_gem_object *tmp;
struct list_head *list;
int n, ret;
lockdep_assert_held(&pool->engine->i915->drm.struct_mutex);
/* Compute a power-of-two bucket, but throw everything greater than
* 16KiB into the same bucket: i.e. the the buckets hold objects of
* (1 page, 2 pages, 4 pages, 8+ pages).
*/
n = fls(size >> PAGE_SHIFT) - 1;
if (n >= ARRAY_SIZE(pool->cache_list))
n = ARRAY_SIZE(pool->cache_list) - 1;
list = &pool->cache_list[n];
list_for_each_entry(tmp, list, batch_pool_link) {
/* The batches are strictly LRU ordered */
if (i915_gem_object_is_active(tmp))
break;
GEM_BUG_ON(!reservation_object_test_signaled_rcu(tmp->resv,
true));
if (tmp->base.size >= size) {
/* Clear the set of shared fences early */
ww_mutex_lock(&tmp->resv->lock, NULL);
reservation_object_add_excl_fence(tmp->resv, NULL);
ww_mutex_unlock(&tmp->resv->lock);
obj = tmp;
break;
}
}
if (obj == NULL) {
obj = i915_gem_object_create_internal(pool->engine->i915, size);
if (IS_ERR(obj))
return obj;
}
ret = i915_gem_object_pin_pages(obj);
if (ret)
return ERR_PTR(ret);
list_move_tail(&obj->batch_pool_link, list);
return obj;
}
static void *i915_gem_dmabuf_vmap(struct dma_buf *dma_buf)
{
struct drm_i915_gem_object *obj = dma_buf_to_obj(dma_buf);
struct drm_device *dev = obj->base.dev;
struct sg_page_iter sg_iter;
struct page **pages;
int ret, i;
ret = i915_mutex_lock_interruptible(dev);
if (ret)
return ERR_PTR(ret);
if (obj->dma_buf_vmapping) {
obj->vmapping_count++;
goto out_unlock;
}
ret = i915_gem_object_get_pages(obj);
if (ret)
goto err;
i915_gem_object_pin_pages(obj);
ret = -ENOMEM;
pages = drm_malloc_ab(obj->base.size >> PAGE_SHIFT, sizeof(*pages));
if (pages == NULL)
goto err_unpin;
i = 0;
for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, 0)
pages[i++] = sg_page_iter_page(&sg_iter);
obj->dma_buf_vmapping = vmap(pages, i, 0, PAGE_KERNEL);
drm_free_large(pages);
if (!obj->dma_buf_vmapping)
goto err_unpin;
obj->vmapping_count = 1;
out_unlock:
mutex_unlock(&dev->struct_mutex);
return obj->dma_buf_vmapping;
err_unpin:
i915_gem_object_unpin_pages(obj);
err:
mutex_unlock(&dev->struct_mutex);
return ERR_PTR(ret);
}
static int igt_dmabuf_import_ownership(void *arg)
{
struct drm_i915_private *i915 = arg;
struct drm_i915_gem_object *obj;
struct dma_buf *dmabuf;
void *ptr;
int err;
dmabuf = mock_dmabuf(1);
if (IS_ERR(dmabuf))
return PTR_ERR(dmabuf);
ptr = dma_buf_vmap(dmabuf);
if (!ptr) {
pr_err("dma_buf_vmap failed\n");
err = -ENOMEM;
goto err_dmabuf;
}
memset(ptr, 0xc5, PAGE_SIZE);
dma_buf_vunmap(dmabuf, ptr);
obj = to_intel_bo(i915_gem_prime_import(&i915->drm, dmabuf));
if (IS_ERR(obj)) {
pr_err("i915_gem_prime_import failed with err=%d\n",
(int)PTR_ERR(obj));
err = PTR_ERR(obj);
goto err_dmabuf;
}
dma_buf_put(dmabuf);
err = i915_gem_object_pin_pages(obj);
if (err) {
pr_err("i915_gem_object_pin_pages failed with err=%d\n", err);
goto out_obj;
}
err = 0;
i915_gem_object_unpin_pages(obj);
out_obj:
i915_gem_object_put(obj);
return err;
err_dmabuf:
dma_buf_put(dmabuf);
return err;
}
static void *i915_gem_dmabuf_vmap(struct dma_buf *dma_buf)
{
struct drm_i915_gem_object *obj = dma_buf->priv;
struct drm_device *dev = obj->base.dev;
struct scatterlist *sg;
struct page **pages;
int ret, i;
ret = i915_mutex_lock_interruptible(dev);
if (ret)
return ERR_PTR(ret);
if (obj->dma_buf_vmapping) {
obj->vmapping_count++;
goto out_unlock;
}
ret = i915_gem_object_get_pages(obj);
if (ret)
goto error;
ret = -ENOMEM;
pages = drm_malloc_ab(obj->pages->nents, sizeof(struct page *));
if (pages == NULL)
goto error;
for_each_sg(obj->pages->sgl, sg, obj->pages->nents, i)
pages[i] = sg_page(sg);
obj->dma_buf_vmapping = vmap(pages, obj->pages->nents, 0, PAGE_KERNEL);
drm_free_large(pages);
if (!obj->dma_buf_vmapping)
goto error;
obj->vmapping_count = 1;
i915_gem_object_pin_pages(obj);
out_unlock:
mutex_unlock(&dev->struct_mutex);
return obj->dma_buf_vmapping;
error:
mutex_unlock(&dev->struct_mutex);
return ERR_PTR(ret);
}
static void i915_clflush_work(struct work_struct *work)
{
struct clflush *clflush = container_of(work, typeof(*clflush), work);
struct drm_i915_gem_object *obj = clflush->obj;
if (i915_gem_object_pin_pages(obj)) {
DRM_ERROR("Failed to acquire obj->pages for clflushing\n");
goto out;
}
__i915_do_clflush(obj);
i915_gem_object_unpin_pages(obj);
out:
i915_gem_object_put(obj);
dma_fence_signal(&clflush->dma);
dma_fence_put(&clflush->dma);
}
static int igt_gem_huge(void *arg)
{
const unsigned int nreal = 509; /* just to be awkward */
struct drm_i915_private *i915 = arg;
struct drm_i915_gem_object *obj;
unsigned int n;
int err;
/* Basic sanitycheck of our huge fake object allocation */
obj = huge_gem_object(i915,
nreal * PAGE_SIZE,
i915->ggtt.vm.total + PAGE_SIZE);
if (IS_ERR(obj))
return PTR_ERR(obj);
err = i915_gem_object_pin_pages(obj);
if (err) {
pr_err("Failed to allocate %u pages (%lu total), err=%d\n",
nreal, obj->base.size / PAGE_SIZE, err);
goto out;
}
for (n = 0; n < obj->base.size / PAGE_SIZE; n++) {
if (i915_gem_object_get_page(obj, n) !=
i915_gem_object_get_page(obj, n % nreal)) {
pr_err("Page lookup mismatch at index %u [%u]\n",
n, n % nreal);
err = -EINVAL;
goto out_unpin;
}
}
out_unpin:
i915_gem_object_unpin_pages(obj);
out:
i915_gem_object_put(obj);
return err;
}
/**
* i915_gem_set_tiling - IOCTL handler to set tiling mode
* @dev: DRM device
* @data: data pointer for the ioctl
* @file: DRM file for the ioctl call
*
* Sets the tiling mode of an object, returning the required swizzling of
* bit 6 of addresses in the object.
*
* Called by the user via ioctl.
*
* Returns:
* Zero on success, negative errno on failure.
*/
int
i915_gem_set_tiling(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_gem_set_tiling *args = data;
struct drm_i915_private *dev_priv = to_i915(dev);
struct drm_i915_gem_object *obj;
int ret = 0;
obj = to_intel_bo(drm_gem_object_lookup(file, args->handle));
if (&obj->base == NULL)
return -ENOENT;
if (!i915_tiling_ok(dev,
args->stride, obj->base.size, args->tiling_mode)) {
drm_gem_object_unreference_unlocked(&obj->base);
return -EINVAL;
}
intel_runtime_pm_get(dev_priv);
mutex_lock(&dev->struct_mutex);
if (obj->pin_display || obj->framebuffer_references) {
ret = -EBUSY;
goto err;
}
if (args->tiling_mode == I915_TILING_NONE) {
args->swizzle_mode = I915_BIT_6_SWIZZLE_NONE;
args->stride = 0;
} else {
if (args->tiling_mode == I915_TILING_X)
args->swizzle_mode = dev_priv->mm.bit_6_swizzle_x;
else
args->swizzle_mode = dev_priv->mm.bit_6_swizzle_y;
/* Hide bit 17 swizzling from the user. This prevents old Mesa
* from aborting the application on sw fallbacks to bit 17,
* and we use the pread/pwrite bit17 paths to swizzle for it.
* If there was a user that was relying on the swizzle
* information for drm_intel_bo_map()ed reads/writes this would
* break it, but we don't have any of those.
*/
if (args->swizzle_mode == I915_BIT_6_SWIZZLE_9_17)
args->swizzle_mode = I915_BIT_6_SWIZZLE_9;
if (args->swizzle_mode == I915_BIT_6_SWIZZLE_9_10_17)
args->swizzle_mode = I915_BIT_6_SWIZZLE_9_10;
/* If we can't handle the swizzling, make it untiled. */
if (args->swizzle_mode == I915_BIT_6_SWIZZLE_UNKNOWN) {
args->tiling_mode = I915_TILING_NONE;
args->swizzle_mode = I915_BIT_6_SWIZZLE_NONE;
args->stride = 0;
}
}
if (args->tiling_mode != obj->tiling_mode ||
args->stride != obj->stride) {
/* We need to rebind the object if its current allocation
* no longer meets the alignment restrictions for its new
* tiling mode. Otherwise we can just leave it alone, but
* need to ensure that any fence register is updated before
* the next fenced (either through the GTT or by the BLT unit
* on older GPUs) access.
*
* After updating the tiling parameters, we then flag whether
* we need to update an associated fence register. Note this
* has to also include the unfenced register the GPU uses
* whilst executing a fenced command for an untiled object.
*/
if (obj->map_and_fenceable &&
!i915_gem_object_fence_ok(obj, args->tiling_mode))
ret = i915_vma_unbind(i915_gem_obj_to_ggtt(obj));
if (ret == 0) {
if (obj->pages &&
obj->madv == I915_MADV_WILLNEED &&
dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES) {
if (args->tiling_mode == I915_TILING_NONE)
i915_gem_object_unpin_pages(obj);
if (obj->tiling_mode == I915_TILING_NONE)
i915_gem_object_pin_pages(obj);
}
obj->fence_dirty =
obj->last_fenced_req ||
obj->fence_reg != I915_FENCE_REG_NONE;
obj->tiling_mode = args->tiling_mode;
obj->stride = args->stride;
/* Force the fence to be reacquired for GTT access */
i915_gem_release_mmap(obj);
}
}
/* we have to maintain this existing ABI... */
args->stride = obj->stride;
args->tiling_mode = obj->tiling_mode;
/* Try to preallocate memory required to save swizzling on put-pages */
if (i915_gem_object_needs_bit17_swizzle(obj)) {
if (obj->bit_17 == NULL) {
obj->bit_17 = kcalloc(BITS_TO_LONGS(obj->base.size >> PAGE_SHIFT),
sizeof(long), GFP_KERNEL);
}
} else {
/**
* i915_gem_batch_pool_get() - allocate a buffer from the pool
* @pool: the batch buffer pool
* @size: the minimum desired size of the returned buffer
*
* Returns an inactive buffer from @pool with at least @size bytes,
* with the pages pinned. The caller must i915_gem_object_unpin_pages()
* on the returned object.
*
* Note: Callers must hold the struct_mutex
*
* Return: the buffer object or an error pointer
*/
struct drm_i915_gem_object *
i915_gem_batch_pool_get(struct i915_gem_batch_pool *pool,
size_t size)
{
struct drm_i915_gem_object *obj;
struct list_head *list;
int n, ret;
lockdep_assert_held(&pool->engine->i915->drm.struct_mutex);
/* Compute a power-of-two bucket, but throw everything greater than
* 16KiB into the same bucket: i.e. the the buckets hold objects of
* (1 page, 2 pages, 4 pages, 8+ pages).
*/
n = fls(size >> PAGE_SHIFT) - 1;
if (n >= ARRAY_SIZE(pool->cache_list))
n = ARRAY_SIZE(pool->cache_list) - 1;
list = &pool->cache_list[n];
list_for_each_entry(obj, list, batch_pool_link) {
/* The batches are strictly LRU ordered */
if (i915_gem_object_is_active(obj)) {
struct reservation_object *resv = obj->resv;
if (!reservation_object_test_signaled_rcu(resv, true))
break;
i915_retire_requests(pool->engine->i915);
GEM_BUG_ON(i915_gem_object_is_active(obj));
/*
* The object is now idle, clear the array of shared
* fences before we add a new request. Although, we
* remain on the same engine, we may be on a different
* timeline and so may continually grow the array,
* trapping a reference to all the old fences, rather
* than replace the existing fence.
*/
if (rcu_access_pointer(resv->fence)) {
reservation_object_lock(resv, NULL);
reservation_object_add_excl_fence(resv, NULL);
reservation_object_unlock(resv);
}
}
GEM_BUG_ON(!reservation_object_test_signaled_rcu(obj->resv,
true));
if (obj->base.size >= size)
goto found;
}
obj = i915_gem_object_create_internal(pool->engine->i915, size);
if (IS_ERR(obj))
return obj;
found:
ret = i915_gem_object_pin_pages(obj);
if (ret)
return ERR_PTR(ret);
list_move_tail(&obj->batch_pool_link, list);
return obj;
}
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;
}
