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-rw-r--r--linux-core/drmP.h3
-rw-r--r--linux-core/drm_bufs.c55
-rw-r--r--linux-core/drm_hashtab.h2
-rw-r--r--linux-core/drm_stub.c4
-rw-r--r--linux-core/drm_vm.c42
5 files changed, 37 insertions, 69 deletions
diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index 6c56b7d4..fb0ba482 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -153,6 +153,7 @@
#define DRM_MEM_HASHTAB 23
#define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)
+#define DRM_MAP_HASH_OFFSET 0x10000000
/*@}*/
@@ -502,6 +503,7 @@ typedef struct drm_sigdata {
*/
typedef struct drm_map_list {
struct list_head head; /**< list head */
+ drm_hash_item_t hash;
drm_map_t *map; /**< mapping */
unsigned int user_token;
} drm_map_list_t;
@@ -679,6 +681,7 @@ typedef struct drm_device {
/*@{ */
drm_map_list_t *maplist; /**< Linked list of regions */
int map_count; /**< Number of mappable regions */
+ drm_open_hash_t map_hash; /**< User token hash table for maps */
/** \name Context handle management */
/*@{ */
diff --git a/linux-core/drm_bufs.c b/linux-core/drm_bufs.c
index eb478ba2..44705259 100644
--- a/linux-core/drm_bufs.c
+++ b/linux-core/drm_bufs.c
@@ -65,44 +65,6 @@ static drm_map_list_t *drm_find_matching_map(drm_device_t *dev,
return NULL;
}
-/*
- * Used to allocate 32-bit handles for mappings.
- */
-#define START_RANGE 0x10000000
-#define END_RANGE 0x40000000
-
-#ifdef _LP64
-static __inline__ unsigned int HandleID(unsigned long lhandle,
- drm_device_t *dev)
-{
- static unsigned int map32_handle = START_RANGE;
- unsigned int hash;
-
- if (lhandle & 0xffffffff00000000) {
- hash = map32_handle;
- map32_handle += PAGE_SIZE;
- if (map32_handle > END_RANGE)
- map32_handle = START_RANGE;
- } else
- hash = lhandle;
-
- while (1) {
- drm_map_list_t *_entry;
- list_for_each_entry(_entry, &dev->maplist->head, head) {
- if (_entry->user_token == hash)
- break;
- }
- if (&_entry->head == &dev->maplist->head)
- return hash;
-
- hash += PAGE_SIZE;
- map32_handle += PAGE_SIZE;
- }
-}
-#else
-# define HandleID(x,dev) (unsigned int)(x)
-#endif
-
/**
* Ioctl to specify a range of memory that is available for mapping by a non-root process.
*
@@ -300,9 +262,18 @@ static int drm_addmap_core(drm_device_t * dev, unsigned int offset,
list_add(&list->head, &dev->maplist->head);
/* Assign a 32-bit handle */
/* We do it here so that dev->struct_sem protects the increment */
- list->user_token = HandleID(map->type == _DRM_SHM
- ? (unsigned long)map->handle
- : map->offset, dev);
+
+ if (drm_ht_just_insert_please(&dev->map_hash, &list->hash,
+ ((map->type == _DRM_SHM) ? (unsigned long)map->handle :
+ map->offset) >> PAGE_SHIFT,
+ 32 - PAGE_SHIFT - 1)) {
+ drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+ drm_free(list, sizeof(*list), DRM_MEM_MAPS);
+ up(&dev->struct_sem);
+ return -ENOMEM;
+ }
+
+ list->user_token = (list->hash.key << PAGE_SHIFT) + DRM_MAP_HASH_OFFSET;
up(&dev->struct_sem);
*maplist = list;
@@ -387,6 +358,8 @@ int drm_rmmap_locked(drm_device_t *dev, drm_local_map_t *map)
if (r_list->map == map) {
list_del(list);
+ drm_ht_remove_key(&dev->map_hash,
+ (r_list->user_token - DRM_MAP_HASH_OFFSET) >> PAGE_SHIFT);
drm_free(list, sizeof(*list), DRM_MEM_MAPS);
break;
}
diff --git a/linux-core/drm_hashtab.h b/linux-core/drm_hashtab.h
index 580a02ed..d792499e 100644
--- a/linux-core/drm_hashtab.h
+++ b/linux-core/drm_hashtab.h
@@ -35,7 +35,7 @@
#ifndef DRM_HASHTAB_H
#define DRM_HASHTAB_H
-#define drm_hash_entry(_a1, _a2, _a3) list_entry(_a1, _a2, _a3)
+#define drm_hash_entry(_ptr, _type, _member) container_of(_ptr, _type, _member)
typedef struct drm_hash_item{
struct hlist_node head;
diff --git a/linux-core/drm_stub.c b/linux-core/drm_stub.c
index 6ba6f6e1..24955634 100644
--- a/linux-core/drm_stub.c
+++ b/linux-core/drm_stub.c
@@ -82,6 +82,10 @@ static int drm_fill_in_dev(drm_device_t * dev, struct pci_dev *pdev,
if (dev->maplist == NULL)
return -ENOMEM;
INIT_LIST_HEAD(&dev->maplist->head);
+ if (drm_ht_create(&dev->map_hash, 12)) {
+ drm_free(dev->maplist, sizeof(*dev->maplist), DRM_MEM_MAPS);
+ return -ENOMEM;
+ }
/* the DRM has 6 counters */
dev->counters = 6;
diff --git a/linux-core/drm_vm.c b/linux-core/drm_vm.c
index b92552e6..93037bda 100644
--- a/linux-core/drm_vm.c
+++ b/linux-core/drm_vm.c
@@ -59,7 +59,7 @@ static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma,
drm_device_t *dev = priv->head->dev;
drm_map_t *map = NULL;
drm_map_list_t *r_list;
- struct list_head *list;
+ drm_hash_item_t *hash;
/*
* Find the right map
@@ -70,14 +70,12 @@ static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma,
if (!dev->agp || !dev->agp->cant_use_aperture)
goto vm_nopage_error;
- list_for_each(list, &dev->maplist->head) {
- r_list = list_entry(list, drm_map_list_t, head);
- map = r_list->map;
- if (!map)
- continue;
- if (r_list->user_token == VM_OFFSET(vma))
- break;
- }
+ if (drm_ht_find_item(&dev->map_hash, (VM_OFFSET(vma) - DRM_MAP_HASH_OFFSET) >> PAGE_SHIFT,
+ &hash))
+ goto vm_nopage_error;
+
+ r_list = drm_hash_entry(hash, drm_map_list_t, hash);
+ map = r_list->map;
if (map && map->type == _DRM_AGP) {
unsigned long offset = address - vma->vm_start;
@@ -556,9 +554,8 @@ int drm_mmap(struct file *filp, struct vm_area_struct *vma)
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->head->dev;
drm_map_t *map = NULL;
- drm_map_list_t *r_list;
unsigned long offset = 0;
- struct list_head *list;
+ drm_hash_item_t *hash;
DRM_DEBUG("start = 0x%lx, end = 0x%lx, offset = 0x%lx\n",
vma->vm_start, vma->vm_end, VM_OFFSET(vma));
@@ -578,22 +575,13 @@ int drm_mmap(struct file *filp, struct vm_area_struct *vma)
)
return drm_mmap_dma(filp, vma);
- /* A sequential search of a linked list is
- fine here because: 1) there will only be
- about 5-10 entries in the list and, 2) a
- DRI client only has to do this mapping
- once, so it doesn't have to be optimized
- for performance, even if the list was a
- bit longer. */
- list_for_each(list, &dev->maplist->head) {
-
- r_list = list_entry(list, drm_map_list_t, head);
- map = r_list->map;
- if (!map)
- continue;
- if (r_list->user_token == VM_OFFSET(vma))
- break;
- }
+ if (drm_ht_find_item(&dev->map_hash, (VM_OFFSET(vma) - DRM_MAP_HASH_OFFSET) >> PAGE_SHIFT,
+ &hash)) {
+ DRM_ERROR("Could not find map\n");
+ return -EINVAL;
+ }
+
+ map = drm_hash_entry(hash,drm_map_list_t, hash)->map;
if (!map || ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN)))
return -EPERM;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-24 18:00:43 +0000