Massive indirection through a hashtable for a simple key->pointer
look-up actually just adds bloat.
Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
drivers/gpu/drm/via/via_drv.h | 2 +
drivers/gpu/drm/via/via_map.c | 1 +
drivers/gpu/drm/via/via_mm.c | 61 +++++++++++++++++++++++++++++++----------
3 files changed, 49 insertions(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/via/via_drv.h b/drivers/gpu/drm/via/via_drv.h
index 9cf87d9..108ea71 100644
--- a/drivers/gpu/drm/via/via_drv.h
+++ b/drivers/gpu/drm/via/via_drv.h
@@ -91,6 +91,8 @@ typedef struct drm_via_private {
struct drm_sman sman;
int vram_initialized;
int agp_initialized;
+ /** Mapping of userspace keys to mm objects */
+ struct idr object_idr;
unsigned long vram_offset;
unsigned long agp_offset;
drm_via_blitq_t blit_queues[VIA_NUM_BLIT_ENGINES];
diff --git a/drivers/gpu/drm/via/via_map.c b/drivers/gpu/drm/via/via_map.c
index 6cca9a7..b09f659 100644
--- a/drivers/gpu/drm/via/via_map.c
+++ b/drivers/gpu/drm/via/via_map.c
@@ -104,6 +104,7 @@ int via_driver_load(struct drm_device *dev, unsigned long
chipset)
dev_priv->chipset = chipset;
+ idr_init(&dev->object_name_idr);
ret = drm_sman_init(&dev_priv->sman, 2, 12, 8);
if (ret) {
kfree(dev_priv);
diff --git a/drivers/gpu/drm/via/via_mm.c b/drivers/gpu/drm/via/via_mm.c
index ea3d621..af9e771 100644
--- a/drivers/gpu/drm/via/via_mm.c
+++ b/drivers/gpu/drm/via/via_mm.c
@@ -118,7 +118,7 @@ int via_mem_alloc(struct drm_device *dev, void *data,
struct drm_file *file)
{
drm_via_mem_t *mem = data;
- int retval = 0;
+ int retval = 0, user_key;
struct drm_memblock_item *item;
drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
struct via_file_private *file_priv = file->driver_priv;
@@ -139,24 +139,46 @@ int via_mem_alloc(struct drm_device *dev, void *data,
tmpSize = (mem->size + VIA_MM_ALIGN_MASK) >> VIA_MM_ALIGN_SHIFT;
item = drm_sman_alloc(&dev_priv->sman, mem->type, tmpSize, 0, 0);
+ if (!item) {
+ retval = -ENOMEM;
+ goto fail_alloc;
+ }
- if (item) {
- INIT_LIST_HEAD(&item->owner_list);
- list_add(&item->owner_list, &file_priv->obj_list);
- mem->offset = ((mem->type == VIA_MEM_VIDEO) ?
- dev_priv->vram_offset : dev_priv->agp_offset) +
- (item->mm->
- offset(item->mm, item->mm_info) << VIA_MM_ALIGN_SHIFT);
- mem->index = item->user_hash.key;
- } else {
- mem->offset = 0;
- mem->size = 0;
- mem->index = 0;
- DRM_DEBUG("Video memory allocation failed\n");
+again:
+ if (idr_pre_get(&dev_priv->object_idr, GFP_KERNEL) == 0) {
retval = -ENOMEM;
+ goto fail_idr;
}
+
+ /* do the allocation under our spinlock */
+ retval = idr_get_new_above(&dev_priv->object_idr, item, 1, &user_key);
+ if (retval == -EAGAIN)
+ goto again;
+ if (retval)
+ goto fail_idr;
+
+ INIT_LIST_HEAD(&item->owner_list);
+ list_add(&item->owner_list, &file_priv->obj_list);
mutex_unlock(&dev->struct_mutex);
+ mem->offset = ((mem->type == VIA_MEM_VIDEO) ?
+ dev_priv->vram_offset : dev_priv->agp_offset) +
+ (item->mm->
+ offset(item->mm, item->mm_info) << VIA_MM_ALIGN_SHIFT);
+ mem->index = user_key;
+
+ return 0;
+
+fail_idr:
+ drm_sman_free(item);
+fail_alloc:
+ mutex_unlock(&dev->struct_mutex);
+
+ mem->offset = 0;
+ mem->size = 0;
+ mem->index = 0;
+ DRM_DEBUG("Video memory allocation failed\n");
+
return retval;
}
@@ -164,11 +186,20 @@ int via_mem_free(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_via_private_t *dev_priv = dev->dev_private;
drm_via_mem_t *mem = data;
+ struct drm_memblock_item *obj;
int ret;
mutex_lock(&dev->struct_mutex);
- ret = drm_sman_free_key(&dev_priv->sman, mem->index);
+ obj = idr_find(&dev_priv->object_idr, mem->index);
+ if (obj == NULL) {
+ mutex_unlock(&dev->struct_mutex);
+ return -EINVAL;
+ }
+
+ idr_remove(&dev_priv->object_idr, mem->index);
+ drm_sman_free(obj);
mutex_unlock(&dev->struct_mutex);
+
DRM_DEBUG("free = 0x%lx\n", mem->index);
return ret;
--
1.7.7.1
