return 0;
}
-/**
- * Pin an object to the GTT and evaluate the relocations landing in it.
- */
static int
-i915_gem_execbuffer_relocate(struct drm_i915_gem_object *obj,
- struct drm_file *file_priv,
- struct drm_i915_gem_exec_object2 *entry)
+i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj,
+ struct drm_file *file_priv,
+ struct drm_i915_gem_exec_object2 *entry,
+ struct drm_i915_gem_relocation_entry *reloc)
{
struct drm_device *dev = obj->base.dev;
- drm_i915_private_t *dev_priv = dev->dev_private;
- struct drm_i915_gem_relocation_entry __user *user_relocs;
- struct drm_gem_object *target_obj = NULL;
- uint32_t target_handle = 0;
- int i, ret = 0;
+ struct drm_gem_object *target_obj;
+ uint32_t target_offset;
+ int ret = -EINVAL;
- user_relocs = (void __user *)(uintptr_t)entry->relocs_ptr;
- for (i = 0; i < entry->relocation_count; i++) {
- struct drm_i915_gem_relocation_entry reloc;
- uint32_t target_offset;
+ target_obj = drm_gem_object_lookup(dev, file_priv,
+ reloc->target_handle);
+ if (target_obj == NULL)
+ return -ENOENT;
- if (__copy_from_user_inatomic(&reloc,
- user_relocs+i,
- sizeof(reloc))) {
- ret = -EFAULT;
- break;
- }
+ target_offset = to_intel_bo(target_obj)->gtt_offset;
- if (reloc.target_handle != target_handle) {
- drm_gem_object_unreference(target_obj);
+#if WATCH_RELOC
+ DRM_INFO("%s: obj %p offset %08x target %d "
+ "read %08x write %08x gtt %08x "
+ "presumed %08x delta %08x\n",
+ __func__,
+ obj,
+ (int) reloc->offset,
+ (int) reloc->target_handle,
+ (int) reloc->read_domains,
+ (int) reloc->write_domain,
+ (int) target_offset,
+ (int) reloc->presumed_offset,
+ reloc->delta);
+#endif
- target_obj = drm_gem_object_lookup(dev, file_priv,
- reloc.target_handle);
- if (target_obj == NULL) {
- ret = -ENOENT;
- break;
- }
+ /* The target buffer should have appeared before us in the
+ * exec_object list, so it should have a GTT space bound by now.
+ */
+ if (target_offset == 0) {
+ DRM_ERROR("No GTT space found for object %d\n",
+ reloc->target_handle);
+ goto err;
+ }
- target_handle = reloc.target_handle;
- }
- target_offset = to_intel_bo(target_obj)->gtt_offset;
+ /* Validate that the target is in a valid r/w GPU domain */
+ if (reloc->write_domain & (reloc->write_domain - 1)) {
+ DRM_ERROR("reloc with multiple write domains: "
+ "obj %p target %d offset %d "
+ "read %08x write %08x",
+ obj, reloc->target_handle,
+ (int) reloc->offset,
+ reloc->read_domains,
+ reloc->write_domain);
+ goto err;
+ }
+ if (reloc->write_domain & I915_GEM_DOMAIN_CPU ||
+ reloc->read_domains & I915_GEM_DOMAIN_CPU) {
+ DRM_ERROR("reloc with read/write CPU domains: "
+ "obj %p target %d offset %d "
+ "read %08x write %08x",
+ obj, reloc->target_handle,
+ (int) reloc->offset,
+ reloc->read_domains,
+ reloc->write_domain);
+ goto err;
+ }
+ if (reloc->write_domain && target_obj->pending_write_domain &&
+ reloc->write_domain != target_obj->pending_write_domain) {
+ DRM_ERROR("Write domain conflict: "
+ "obj %p target %d offset %d "
+ "new %08x old %08x\n",
+ obj, reloc->target_handle,
+ (int) reloc->offset,
+ reloc->write_domain,
+ target_obj->pending_write_domain);
+ goto err;
+ }
-#if WATCH_RELOC
- DRM_INFO("%s: obj %p offset %08x target %d "
- "read %08x write %08x gtt %08x "
- "presumed %08x delta %08x\n",
- __func__,
- obj,
- (int) reloc.offset,
- (int) reloc.target_handle,
- (int) reloc.read_domains,
- (int) reloc.write_domain,
- (int) target_offset,
- (int) reloc.presumed_offset,
- reloc.delta);
-#endif
+ target_obj->pending_read_domains |= reloc->read_domains;
+ target_obj->pending_write_domain |= reloc->write_domain;
- /* The target buffer should have appeared before us in the
- * exec_object list, so it should have a GTT space bound by now.
- */
- if (target_offset == 0) {
- DRM_ERROR("No GTT space found for object %d\n",
- reloc.target_handle);
- ret = -EINVAL;
- break;
- }
+ /* If the relocation already has the right value in it, no
+ * more work needs to be done.
+ */
+ if (target_offset == reloc->presumed_offset)
+ goto out;
- /* Validate that the target is in a valid r/w GPU domain */
- if (reloc.write_domain & (reloc.write_domain - 1)) {
- DRM_ERROR("reloc with multiple write domains: "
- "obj %p target %d offset %d "
- "read %08x write %08x",
- obj, reloc.target_handle,
- (int) reloc.offset,
- reloc.read_domains,
- reloc.write_domain);
- ret = -EINVAL;
- break;
- }
- if (reloc.write_domain & I915_GEM_DOMAIN_CPU ||
- reloc.read_domains & I915_GEM_DOMAIN_CPU) {
- DRM_ERROR("reloc with read/write CPU domains: "
- "obj %p target %d offset %d "
- "read %08x write %08x",
- obj, reloc.target_handle,
- (int) reloc.offset,
- reloc.read_domains,
- reloc.write_domain);
- ret = -EINVAL;
- break;
- }
- if (reloc.write_domain && target_obj->pending_write_domain &&
- reloc.write_domain != target_obj->pending_write_domain) {
- DRM_ERROR("Write domain conflict: "
- "obj %p target %d offset %d "
- "new %08x old %08x\n",
- obj, reloc.target_handle,
- (int) reloc.offset,
- reloc.write_domain,
- target_obj->pending_write_domain);
- ret = -EINVAL;
- break;
- }
+ /* Check that the relocation address is valid... */
+ if (reloc->offset > obj->base.size - 4) {
+ DRM_ERROR("Relocation beyond object bounds: "
+ "obj %p target %d offset %d size %d.\n",
+ obj, reloc->target_handle,
+ (int) reloc->offset,
+ (int) obj->base.size);
+ goto err;
+ }
+ if (reloc->offset & 3) {
+ DRM_ERROR("Relocation not 4-byte aligned: "
+ "obj %p target %d offset %d.\n",
+ obj, reloc->target_handle,
+ (int) reloc->offset);
+ goto err;
+ }
- target_obj->pending_read_domains |= reloc.read_domains;
- target_obj->pending_write_domain |= reloc.write_domain;
+ /* and points to somewhere within the target object. */
+ if (reloc->delta >= target_obj->size) {
+ DRM_ERROR("Relocation beyond target object bounds: "
+ "obj %p target %d delta %d size %d.\n",
+ obj, reloc->target_handle,
+ (int) reloc->delta,
+ (int) target_obj->size);
+ goto err;
+ }
- /* If the relocation already has the right value in it, no
- * more work needs to be done.
- */
- if (target_offset == reloc.presumed_offset)
- continue;
+ reloc->delta += target_offset;
+ if (obj->base.write_domain == I915_GEM_DOMAIN_CPU) {
+ uint32_t page_offset = reloc->offset & ~PAGE_MASK;
+ char *vaddr;
- /* Check that the relocation address is valid... */
- if (reloc.offset > obj->base.size - 4) {
- DRM_ERROR("Relocation beyond object bounds: "
- "obj %p target %d offset %d size %d.\n",
- obj, reloc.target_handle,
- (int) reloc.offset, (int) obj->base.size);
- ret = -EINVAL;
- break;
- }
- if (reloc.offset & 3) {
- DRM_ERROR("Relocation not 4-byte aligned: "
- "obj %p target %d offset %d.\n",
- obj, reloc.target_handle,
- (int) reloc.offset);
- ret = -EINVAL;
- break;
- }
+ vaddr = kmap_atomic(obj->pages[reloc->offset >> PAGE_SHIFT]);
+ *(uint32_t *)(vaddr + page_offset) = reloc->delta;
+ kunmap_atomic(vaddr);
+ } else {
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ uint32_t __iomem *reloc_entry;
+ void __iomem *reloc_page;
- /* and points to somewhere within the target object. */
- if (reloc.delta >= target_obj->size) {
- DRM_ERROR("Relocation beyond target object bounds: "
- "obj %p target %d delta %d size %d.\n",
- obj, reloc.target_handle,
- (int) reloc.delta, (int) target_obj->size);
- ret = -EINVAL;
- break;
- }
+ ret = i915_gem_object_set_to_gtt_domain(&obj->base, 1);
+ if (ret)
+ goto err;
- reloc.delta += target_offset;
- if (obj->base.write_domain == I915_GEM_DOMAIN_CPU) {
- uint32_t page_offset = reloc.offset & ~PAGE_MASK;
- char *vaddr;
+ /* Map the page containing the relocation we're going to perform. */
+ reloc->offset += obj->gtt_offset;
+ reloc_page = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping,
+ reloc->offset & PAGE_MASK);
+ reloc_entry = (uint32_t __iomem *)
+ (reloc_page + (reloc->offset & ~PAGE_MASK));
+ iowrite32(reloc->delta, reloc_entry);
+ io_mapping_unmap_atomic(reloc_page);
+ }
- vaddr = kmap_atomic(obj->pages[reloc.offset >> PAGE_SHIFT]);
- *(uint32_t *)(vaddr + page_offset) = reloc.delta;
- kunmap_atomic(vaddr);
- } else {
- uint32_t __iomem *reloc_entry;
- void __iomem *reloc_page;
+ /* and update the user's relocation entry */
+ reloc->presumed_offset = target_offset;
- ret = i915_gem_object_set_to_gtt_domain(&obj->base, 1);
- if (ret)
- break;
+out:
+ ret = 0;
+err:
+ drm_gem_object_unreference(target_obj);
+ return ret;
+}
- /* Map the page containing the relocation we're going to perform. */
- reloc.offset += obj->gtt_offset;
- reloc_page = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping,
- reloc.offset & PAGE_MASK);
- reloc_entry = (uint32_t __iomem *)
- (reloc_page + (reloc.offset & ~PAGE_MASK));
- iowrite32(reloc.delta, reloc_entry);
- io_mapping_unmap_atomic(reloc_page);
- }
+static int
+i915_gem_execbuffer_relocate_object(struct drm_i915_gem_object *obj,
+ struct drm_file *file_priv,
+ struct drm_i915_gem_exec_object2 *entry)
+{
+ struct drm_i915_gem_relocation_entry __user *user_relocs;
+ int i, ret;
+
+ user_relocs = (void __user *)(uintptr_t)entry->relocs_ptr;
+ for (i = 0; i < entry->relocation_count; i++) {
+ struct drm_i915_gem_relocation_entry reloc;
+
+ if (__copy_from_user_inatomic(&reloc,
+ user_relocs+i,
+ sizeof(reloc)))
+ return -EFAULT;
+
+ ret = i915_gem_execbuffer_relocate_entry(obj, file_priv, entry, &reloc);
+ if (ret)
+ return ret;
- /* and update the user's relocation entry */
- reloc.presumed_offset = target_offset;
if (__copy_to_user_inatomic(&user_relocs[i].presumed_offset,
- &reloc.presumed_offset,
- sizeof(reloc.presumed_offset))) {
- ret = -EFAULT;
- break;
- }
+ &reloc.presumed_offset,
+ sizeof(reloc.presumed_offset)))
+ return -EFAULT;
}
- drm_gem_object_unreference(target_obj);
- return ret;
+ return 0;
}
static int
-i915_gem_execbuffer_pin(struct drm_device *dev,
- struct drm_file *file,
- struct drm_gem_object **object_list,
- struct drm_i915_gem_exec_object2 *exec_list,
- int count)
+i915_gem_execbuffer_relocate_object_slow(struct drm_i915_gem_object *obj,
+ struct drm_file *file_priv,
+ struct drm_i915_gem_exec_object2 *entry,
+ struct drm_i915_gem_relocation_entry *relocs)
+{
+ int i, ret;
+
+ for (i = 0; i < entry->relocation_count; i++) {
+ ret = i915_gem_execbuffer_relocate_entry(obj, file_priv, entry, &relocs[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int
+i915_gem_execbuffer_relocate(struct drm_device *dev,
+ struct drm_file *file,
+ struct drm_gem_object **object_list,
+ struct drm_i915_gem_exec_object2 *exec_list,
+ int count)
+{
+ int i, ret;
+
+ for (i = 0; i < count; i++) {
+ struct drm_i915_gem_object *obj = to_intel_bo(object_list[i]);
+ obj->base.pending_read_domains = 0;
+ obj->base.pending_write_domain = 0;
+ ret = i915_gem_execbuffer_relocate_object(obj, file,
+ &exec_list[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int
+i915_gem_execbuffer_reserve(struct drm_device *dev,
+ struct drm_file *file,
+ struct drm_gem_object **object_list,
+ struct drm_i915_gem_exec_object2 *exec_list,
+ int count)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int ret, i, retry;
} while (1);
}
+static int
+i915_gem_execbuffer_relocate_slow(struct drm_device *dev,
+ struct drm_file *file,
+ struct drm_gem_object **object_list,
+ struct drm_i915_gem_exec_object2 *exec_list,
+ int count)
+{
+ struct drm_i915_gem_relocation_entry *reloc;
+ int i, total, ret;
+
+ for (i = 0; i < count; i++) {
+ struct drm_i915_gem_object *obj = to_intel_bo(object_list[i]);
+ obj->in_execbuffer = false;
+ }
+
+ mutex_unlock(&dev->struct_mutex);
+
+ total = 0;
+ for (i = 0; i < count; i++)
+ total += exec_list[i].relocation_count;
+
+ reloc = drm_malloc_ab(total, sizeof(*reloc));
+ if (reloc == NULL) {
+ mutex_lock(&dev->struct_mutex);
+ return -ENOMEM;
+ }
+
+ total = 0;
+ for (i = 0; i < count; i++) {
+ struct drm_i915_gem_relocation_entry __user *user_relocs;
+
+ user_relocs = (void __user *)(uintptr_t)exec_list[i].relocs_ptr;
+
+ if (copy_from_user(reloc+total, user_relocs,
+ exec_list[i].relocation_count *
+ sizeof(*reloc))) {
+ ret = -EFAULT;
+ mutex_lock(&dev->struct_mutex);
+ goto err;
+ }
+
+ total += exec_list[i].relocation_count;
+ }
+
+ ret = i915_mutex_lock_interruptible(dev);
+ if (ret) {
+ mutex_lock(&dev->struct_mutex);
+ goto err;
+ }
+
+ ret = i915_gem_execbuffer_reserve(dev, file,
+ object_list, exec_list,
+ count);
+ if (ret)
+ goto err;
+
+ total = 0;
+ for (i = 0; i < count; i++) {
+ struct drm_i915_gem_object *obj = to_intel_bo(object_list[i]);
+ obj->base.pending_read_domains = 0;
+ obj->base.pending_write_domain = 0;
+ ret = i915_gem_execbuffer_relocate_object_slow(obj, file,
+ &exec_list[i],
+ reloc + total);
+ if (ret)
+ goto err;
+
+ total += exec_list[i].relocation_count;
+ }
+
+ /* Leave the user relocations as are, this is the painfully slow path,
+ * and we want to avoid the complication of dropping the lock whilst
+ * having buffers reserved in the aperture and so causing spurious
+ * ENOSPC for random operations.
+ */
+
+err:
+ drm_free_large(reloc);
+ return ret;
+}
+
static int
i915_gem_execbuffer_move_to_gpu(struct drm_device *dev,
struct drm_file *file,
}
/* Move the objects en-masse into the GTT, evicting if necessary. */
- ret = i915_gem_execbuffer_pin(dev, file,
- object_list, exec_list,
- args->buffer_count);
+ ret = i915_gem_execbuffer_reserve(dev, file,
+ object_list, exec_list,
+ args->buffer_count);
if (ret)
goto err;
/* The objects are in their final locations, apply the relocations. */
- for (i = 0; i < args->buffer_count; i++) {
- struct drm_i915_gem_object *obj = to_intel_bo(object_list[i]);
- obj->base.pending_read_domains = 0;
- obj->base.pending_write_domain = 0;
- ret = i915_gem_execbuffer_relocate(obj, file, &exec_list[i]);
+ ret = i915_gem_execbuffer_relocate(dev, file,
+ object_list, exec_list,
+ args->buffer_count);
+ if (ret) {
+ if (ret == -EFAULT) {
+ ret = i915_gem_execbuffer_relocate_slow(dev, file,
+ object_list,
+ exec_list,
+ args->buffer_count);
+ BUG_ON(!mutex_is_locked(&dev->struct_mutex));
+ }
if (ret)
goto err;
}
projects / cascardo / linux.git / blobdiff