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Merge tag 'vmwgfx-next-2014-01-13' of git://people.freedesktop.org/~thomash/linux into drm-next

Browse Source 
Anyway, nothing big here, Three more code cleanup patches from Rashika
Kheria, and one TTM/vmwgfx patch from me that tightens security around TTM
objects enough for them to opened using prime objects from render nodes:

Previously any client could access a shared buffer using the "name", also
without actually opening it. Now a reference is required, and for render nodes
such a reference is intended to only be obtainable using a prime fd.

vmwgfx-next 2014-01-13 pull request

* tag 'vmwgfx-next-2014-01-13' of git://people.freedesktop.org/~thomash/linux:
  drivers: gpu: Mark functions as static in vmwgfx_fence.c
  drivers: gpu: Mark functions as static in vmwgfx_buffer.c
  drivers: gpu: Mark functions as static in vmwgfx_kms.c
  drm/ttm: ttm object security fixes for render nodes
This commit is contained in:
Dave Airlie 2014-01-14 10:55:36 +10:00
commit faf096ffba
6 changed files with 89 additions and 55 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

94
drivers/gpu/drm/ttm/ttm_object.c
View File

@ -68,7 +68,7 @@
struct ttm_object_file {
struct ttm_object_device *tdev;
rwlock_t lock;
spinlock_t lock;
struct list_head ref_list;
struct drm_open_hash ref_hash[TTM_REF_NUM];
struct kref refcount;
@ -118,6 +118,7 @@ struct ttm_object_device {
*/
struct ttm_ref_object {
struct rcu_head rcu_head;
struct drm_hash_item hash;
struct list_head head;
struct kref kref;
@ -210,10 +211,9 @@ static void ttm_release_base(struct kref *kref)
* call_rcu() or ttm_base_object_kfree().
*/
if (base->refcount_release) {
ttm_object_file_unref(&base->tfile);
ttm_object_file_unref(&base->tfile);
if (base->refcount_release)
base->refcount_release(&base);
}
}
void ttm_base_object_unref(struct ttm_base_object **p_base)
@ -229,33 +229,47 @@ EXPORT_SYMBOL(ttm_base_object_unref);
struct ttm_base_object *ttm_base_object_lookup(struct ttm_object_file *tfile,
uint32_t key)
{
struct ttm_object_device *tdev = tfile->tdev;
struct ttm_base_object *uninitialized_var(base);
struct ttm_base_object *base = NULL;
struct drm_hash_item *hash;
struct drm_open_hash *ht = &tfile->ref_hash[TTM_REF_USAGE];
int ret;
rcu_read_lock();
ret = drm_ht_find_item_rcu(&tdev->object_hash, key, &hash);
ret = drm_ht_find_item_rcu(ht, key, &hash);
if (likely(ret == 0)) {
base = drm_hash_entry(hash, struct ttm_base_object, hash);
ret = kref_get_unless_zero(&base->refcount) ? 0 : -EINVAL;
base = drm_hash_entry(hash, struct ttm_ref_object, hash)->obj;
if (!kref_get_unless_zero(&base->refcount))
base = NULL;
}
rcu_read_unlock();
if (unlikely(ret != 0))
return NULL;
if (tfile != base->tfile && !base->shareable) {
pr_err("Attempted access of non-shareable object\n");
ttm_base_object_unref(&base);
return NULL;
}
return base;
}
EXPORT_SYMBOL(ttm_base_object_lookup);
struct ttm_base_object *
ttm_base_object_lookup_for_ref(struct ttm_object_device *tdev, uint32_t key)
{
struct ttm_base_object *base = NULL;
struct drm_hash_item *hash;
struct drm_open_hash *ht = &tdev->object_hash;
int ret;
rcu_read_lock();
ret = drm_ht_find_item_rcu(ht, key, &hash);
if (likely(ret == 0)) {
base = drm_hash_entry(hash, struct ttm_base_object, hash);
if (!kref_get_unless_zero(&base->refcount))
base = NULL;
}
rcu_read_unlock();
return base;
}
EXPORT_SYMBOL(ttm_base_object_lookup_for_ref);
int ttm_ref_object_add(struct ttm_object_file *tfile,
struct ttm_base_object *base,
enum ttm_ref_type ref_type, bool *existed)
@ -266,21 +280,25 @@ int ttm_ref_object_add(struct ttm_object_file *tfile,
struct ttm_mem_global *mem_glob = tfile->tdev->mem_glob;
int ret = -EINVAL;
if (base->tfile != tfile && !base->shareable)
return -EPERM;
if (existed != NULL)
*existed = true;
while (ret == -EINVAL) {
read_lock(&tfile->lock);
ret = drm_ht_find_item(ht, base->hash.key, &hash);
rcu_read_lock();
ret = drm_ht_find_item_rcu(ht, base->hash.key, &hash);
if (ret == 0) {
ref = drm_hash_entry(hash, struct ttm_ref_object, hash);
kref_get(&ref->kref);
read_unlock(&tfile->lock);
break;
if (!kref_get_unless_zero(&ref->kref)) {
rcu_read_unlock();
break;
}
}
read_unlock(&tfile->lock);
rcu_read_unlock();
ret = ttm_mem_global_alloc(mem_glob, sizeof(*ref),
false, false);
if (unlikely(ret != 0))
@ -297,19 +315,19 @@ int ttm_ref_object_add(struct ttm_object_file *tfile,
ref->ref_type = ref_type;
kref_init(&ref->kref);
write_lock(&tfile->lock);
ret = drm_ht_insert_item(ht, &ref->hash);
spin_lock(&tfile->lock);
ret = drm_ht_insert_item_rcu(ht, &ref->hash);
if (likely(ret == 0)) {
list_add_tail(&ref->head, &tfile->ref_list);
kref_get(&base->refcount);
write_unlock(&tfile->lock);
spin_unlock(&tfile->lock);
if (existed != NULL)
*existed = false;
break;
}
write_unlock(&tfile->lock);
spin_unlock(&tfile->lock);
BUG_ON(ret != -EINVAL);
ttm_mem_global_free(mem_glob, sizeof(*ref));
@ -330,17 +348,17 @@ static void ttm_ref_object_release(struct kref *kref)
struct ttm_mem_global *mem_glob = tfile->tdev->mem_glob;
ht = &tfile->ref_hash[ref->ref_type];
(void)drm_ht_remove_item(ht, &ref->hash);
(void)drm_ht_remove_item_rcu(ht, &ref->hash);
list_del(&ref->head);
write_unlock(&tfile->lock);
spin_unlock(&tfile->lock);
if (ref->ref_type != TTM_REF_USAGE && base->ref_obj_release)
base->ref_obj_release(base, ref->ref_type);
ttm_base_object_unref(&ref->obj);
ttm_mem_global_free(mem_glob, sizeof(*ref));
kfree(ref);
write_lock(&tfile->lock);
kfree_rcu(ref, rcu_head);
spin_lock(&tfile->lock);
}
int ttm_ref_object_base_unref(struct ttm_object_file *tfile,
@ -351,15 +369,15 @@ int ttm_ref_object_base_unref(struct ttm_object_file *tfile,
struct drm_hash_item *hash;
int ret;
write_lock(&tfile->lock);
spin_lock(&tfile->lock);
ret = drm_ht_find_item(ht, key, &hash);
if (unlikely(ret != 0)) {
write_unlock(&tfile->lock);
spin_unlock(&tfile->lock);
return -EINVAL;
}
ref = drm_hash_entry(hash, struct ttm_ref_object, hash);
kref_put(&ref->kref, ttm_ref_object_release);
write_unlock(&tfile->lock);
spin_unlock(&tfile->lock);
return 0;
}
EXPORT_SYMBOL(ttm_ref_object_base_unref);
@ -372,7 +390,7 @@ void ttm_object_file_release(struct ttm_object_file **p_tfile)
struct ttm_object_file *tfile = *p_tfile;
*p_tfile = NULL;
write_lock(&tfile->lock);
spin_lock(&tfile->lock);
/*
* Since we release the lock within the loop, we have to
@ -388,7 +406,7 @@ void ttm_object_file_release(struct ttm_object_file **p_tfile)
for (i = 0; i < TTM_REF_NUM; ++i)
drm_ht_remove(&tfile->ref_hash[i]);
write_unlock(&tfile->lock);
spin_unlock(&tfile->lock);
ttm_object_file_unref(&tfile);
}
EXPORT_SYMBOL(ttm_object_file_release);
@ -404,7 +422,7 @@ struct ttm_object_file *ttm_object_file_init(struct ttm_object_device *tdev,
if (unlikely(tfile == NULL))
return NULL;
rwlock_init(&tfile->lock);
spin_lock_init(&tfile->lock);
tfile->tdev = tdev;
kref_init(&tfile->refcount);
INIT_LIST_HEAD(&tfile->ref_list);

8
drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
View File

@ -517,7 +517,7 @@ static struct ttm_backend_func vmw_ttm_func = {
.destroy = vmw_ttm_destroy,
};
struct ttm_tt *vmw_ttm_tt_create(struct ttm_bo_device *bdev,
static struct ttm_tt *vmw_ttm_tt_create(struct ttm_bo_device *bdev,
unsigned long size, uint32_t page_flags,
struct page *dummy_read_page)
{
@ -546,12 +546,12 @@ out_no_init:
return NULL;
}
int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
static int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
{
return 0;
}
int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
static int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
struct ttm_mem_type_manager *man)
{
switch (type) {
@ -589,7 +589,7 @@ int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
return 0;
}
void vmw_evict_flags(struct ttm_buffer_object *bo,
static void vmw_evict_flags(struct ttm_buffer_object *bo,
struct ttm_placement *placement)
{
*placement = vmw_sys_placement;

9
drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
View File

@ -271,7 +271,7 @@ void vmw_fence_obj_unreference(struct vmw_fence_obj **fence_p)
spin_unlock_irq(&fman->lock);
}
void vmw_fences_perform_actions(struct vmw_fence_manager *fman,
static void vmw_fences_perform_actions(struct vmw_fence_manager *fman,
struct list_head *list)
{
struct vmw_fence_action *action, *next_action;
@ -897,7 +897,7 @@ static void vmw_event_fence_action_cleanup(struct vmw_fence_action *action)
* Note that the action callbacks may be executed before this function
* returns.
*/
void vmw_fence_obj_add_action(struct vmw_fence_obj *fence,
static void vmw_fence_obj_add_action(struct vmw_fence_obj *fence,
struct vmw_fence_action *action)
{
struct vmw_fence_manager *fman = fence->fman;
@ -993,7 +993,7 @@ struct vmw_event_fence_pending {
struct drm_vmw_event_fence event;
};
int vmw_event_fence_action_create(struct drm_file *file_priv,
static int vmw_event_fence_action_create(struct drm_file *file_priv,
struct vmw_fence_obj *fence,
uint32_t flags,
uint64_t user_data,
@ -1080,7 +1080,8 @@ int vmw_fence_event_ioctl(struct drm_device *dev, void *data,
*/
if (arg->handle) {
struct ttm_base_object *base =
ttm_base_object_lookup(vmw_fp->tfile, arg->handle);
ttm_base_object_lookup_for_ref(dev_priv->tdev,
arg->handle);
if (unlikely(base == NULL)) {
DRM_ERROR("Fence event invalid fence object handle "

12
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
View File

@ -40,7 +40,7 @@ struct vmw_clip_rect {
* Clip @num_rects number of @rects against @clip storing the
* results in @out_rects and the number of passed rects in @out_num.
*/
void vmw_clip_cliprects(struct drm_clip_rect *rects,
static void vmw_clip_cliprects(struct drm_clip_rect *rects,
int num_rects,
struct vmw_clip_rect clip,
SVGASignedRect *out_rects,
@ -423,7 +423,7 @@ struct vmw_framebuffer_surface {
struct drm_master *master;
};
void vmw_framebuffer_surface_destroy(struct drm_framebuffer *framebuffer)
static void vmw_framebuffer_surface_destroy(struct drm_framebuffer *framebuffer)
{
struct vmw_framebuffer_surface *vfbs =
vmw_framebuffer_to_vfbs(framebuffer);
@ -589,7 +589,7 @@ out_free_tmp:
return ret;
}
int vmw_framebuffer_surface_dirty(struct drm_framebuffer *framebuffer,
static int vmw_framebuffer_surface_dirty(struct drm_framebuffer *framebuffer,
struct drm_file *file_priv,
unsigned flags, unsigned color,
struct drm_clip_rect *clips,
@ -761,7 +761,7 @@ struct vmw_framebuffer_dmabuf {
struct vmw_dma_buffer *buffer;
};
void vmw_framebuffer_dmabuf_destroy(struct drm_framebuffer *framebuffer)
static void vmw_framebuffer_dmabuf_destroy(struct drm_framebuffer *framebuffer)
{
struct vmw_framebuffer_dmabuf *vfbd =
vmw_framebuffer_to_vfbd(framebuffer);
@ -947,7 +947,7 @@ static int do_dmabuf_dirty_sou(struct drm_file *file_priv,
return ret;
}
int vmw_framebuffer_dmabuf_dirty(struct drm_framebuffer *framebuffer,
static int vmw_framebuffer_dmabuf_dirty(struct drm_framebuffer *framebuffer,
struct drm_file *file_priv,
unsigned flags, unsigned color,
struct drm_clip_rect *clips,
@ -1677,7 +1677,7 @@ void vmw_disable_vblank(struct drm_device *dev, int crtc)
* Small shared kms functions.
*/
int vmw_du_update_layout(struct vmw_private *dev_priv, unsigned num,
static int vmw_du_update_layout(struct vmw_private *dev_priv, unsigned num,
struct drm_vmw_rect *rects)
{
struct drm_device *dev = dev_priv->dev;

3
drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
View File

@ -843,6 +843,7 @@ out_unlock:
int vmw_surface_reference_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct vmw_private *dev_priv = vmw_priv(dev);
union drm_vmw_surface_reference_arg *arg =
(union drm_vmw_surface_reference_arg *)data;
struct drm_vmw_surface_arg *req = &arg->req;
@ -854,7 +855,7 @@ int vmw_surface_reference_ioctl(struct drm_device *dev, void *data,
struct ttm_base_object *base;
int ret = -EINVAL;
base = ttm_base_object_lookup(tfile, req->sid);
base = ttm_base_object_lookup_for_ref(dev_priv->tdev, req->sid);
if (unlikely(base == NULL)) {
DRM_ERROR("Could not find surface to reference.\n");
return -EINVAL;

18
include/drm/ttm/ttm_object.h
View File

@ -190,13 +190,25 @@ extern int ttm_base_object_init(struct ttm_object_file *tfile,
* @key: Hash key
*
* Looks up a struct ttm_base_object with the key @key.
* Also verifies that the object is visible to the application, by
* comparing the @tfile argument and checking the object shareable flag.
*/
extern struct ttm_base_object *ttm_base_object_lookup(struct ttm_object_file
*tfile, uint32_t key);
/**
* ttm_base_object_lookup_for_ref
*
* @tdev: Pointer to a struct ttm_object_device.
* @key: Hash key
*
* Looks up a struct ttm_base_object with the key @key.
* This function should only be used when the struct tfile associated with the
* caller doesn't yet have a reference to the base object.
*/
extern struct ttm_base_object *
ttm_base_object_lookup_for_ref(struct ttm_object_device *tdev, uint32_t key);
/**
* ttm_base_object_unref
*
@ -218,6 +230,8 @@ extern void ttm_base_object_unref(struct ttm_base_object **p_base);
* @existed: Upon completion, indicates that an identical reference object
* already existed, and the refcount was upped on that object instead.
*
* Checks that the base object is shareable and adds a ref object to it.
*
* Adding a ref object to a base object is basically like referencing the
* base object, but a user-space application holds the reference. When the
* file corresponding to @tfile is closed, all its reference objects are