summaryrefslogtreecommitdiff
path: root/linux-core
diff options
context:
space:
mode:
Diffstat (limited to 'linux-core')
-rw-r--r--linux-core/drm_bo.c90
-rw-r--r--linux-core/drm_objects.h23
-rw-r--r--linux-core/drm_ttm.c138
3 files changed, 201 insertions, 50 deletions
diff --git a/linux-core/drm_bo.c b/linux-core/drm_bo.c
index dc96e8aa..ea680a17 100644
--- a/linux-core/drm_bo.c
+++ b/linux-core/drm_bo.c
@@ -137,9 +137,9 @@ static int drm_bo_add_ttm(struct drm_buffer_object * bo)
{
struct drm_device *dev = bo->dev;
int ret = 0;
- bo->ttm = NULL;
DRM_ASSERT_LOCKED(&bo->mutex);
+ bo->ttm = NULL;
switch (bo->type) {
case drm_bo_type_dc:
@@ -149,6 +149,18 @@ static int drm_bo_add_ttm(struct drm_buffer_object * bo)
ret = -ENOMEM;
break;
case drm_bo_type_user:
+ bo->ttm = drm_ttm_init(dev, bo->num_pages << PAGE_SHIFT);
+ if (!bo->ttm)
+ ret = -ENOMEM;
+
+ ret = drm_ttm_set_user(bo->ttm, current,
+ bo->mem.mask & DRM_BO_FLAG_WRITE,
+ bo->buffer_start,
+ bo->num_pages,
+ dev->bm.dummy_read_page);
+ if (ret)
+ return ret;
+
break;
default:
DRM_ERROR("Illegal buffer object type\n");
@@ -784,12 +796,15 @@ static int drm_bo_mem_force_space(struct drm_device * dev,
}
static int drm_bo_mt_compatible(struct drm_mem_type_manager * man,
+ int disallow_fixed,
uint32_t mem_type,
uint64_t mask, uint32_t * res_mask)
{
uint64_t cur_flags = drm_bo_type_flags(mem_type);
uint64_t flag_diff;
+ if ((man->flags & _DRM_FLAG_MEMTYPE_FIXED) && disallow_fixed)
+ return 0;
if (man->flags & _DRM_FLAG_MEMTYPE_CACHED)
cur_flags |= DRM_BO_FLAG_CACHED;
if (man->flags & _DRM_FLAG_MEMTYPE_MAPPABLE)
@@ -854,7 +869,9 @@ int drm_bo_mem_space(struct drm_buffer_object * bo,
mem_type = prios[i];
man = &bm->man[mem_type];
- type_ok = drm_bo_mt_compatible(man, mem_type, mem->mask,
+ type_ok = drm_bo_mt_compatible(man,
+ bo->type == drm_bo_type_user,
+ mem_type, mem->mask,
&cur_flags);
if (!type_ok)
@@ -903,7 +920,11 @@ int drm_bo_mem_space(struct drm_buffer_object * bo,
if (!man->has_type)
continue;
- if (!drm_bo_mt_compatible(man, mem_type, mem->mask, &cur_flags))
+ if (!drm_bo_mt_compatible(man,
+ bo->type == drm_bo_type_user,
+ mem_type,
+ mem->mask,
+ &cur_flags))
continue;
ret = drm_bo_mem_force_space(dev, mem, mem_type, no_wait);
@@ -928,8 +949,10 @@ static int drm_bo_new_mask(struct drm_buffer_object * bo,
{
uint32_t new_props;
- if (bo->type == drm_bo_type_user) {
- DRM_ERROR("User buffers are not supported yet.\n");
+ if (bo->type == drm_bo_type_user &&
+ ((used_mask & (DRM_BO_FLAG_CACHED | DRM_BO_FLAG_FORCE_CACHING)) !=
+ (DRM_BO_FLAG_CACHED | DRM_BO_FLAG_FORCE_CACHING))) {
+ DRM_ERROR("User buffers require cache-coherent memory.\n");
return -EINVAL;
}
@@ -1120,7 +1143,12 @@ static void drm_bo_fill_rep_arg(struct drm_buffer_object * bo,
rep->flags = bo->mem.flags;
rep->size = bo->num_pages * PAGE_SIZE;
rep->offset = bo->offset;
- rep->arg_handle = bo->map_list.user_token;
+
+ if (bo->type == drm_bo_type_dc)
+ rep->arg_handle = bo->map_list.user_token;
+ else
+ rep->arg_handle = 0;
+
rep->mask = bo->mem.mask;
rep->buffer_start = bo->buffer_start;
rep->fence_flags = bo->fence_type;
@@ -1619,10 +1647,7 @@ int drm_buffer_object_create(struct drm_device *dev,
int ret = 0;
unsigned long num_pages;
- if (buffer_start & ~PAGE_MASK) {
- DRM_ERROR("Invalid buffer object start.\n");
- return -EINVAL;
- }
+ size += buffer_start & ~PAGE_MASK;
num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
if (num_pages == 0) {
DRM_ERROR("Illegal buffer object size.\n");
@@ -1648,23 +1673,20 @@ int drm_buffer_object_create(struct drm_device *dev,
INIT_LIST_HEAD(&bo->vma_list);
#endif
bo->dev = dev;
- if (buffer_start != 0)
- bo->type = drm_bo_type_user;
- else
- bo->type = type;
+ bo->type = type;
bo->num_pages = num_pages;
bo->mem.mem_type = DRM_BO_MEM_LOCAL;
bo->mem.num_pages = bo->num_pages;
bo->mem.mm_node = NULL;
bo->mem.page_alignment = page_alignment;
- bo->buffer_start = buffer_start;
+ bo->buffer_start = buffer_start & PAGE_MASK;
bo->priv_flags = 0;
- bo->mem.flags = DRM_BO_FLAG_MEM_LOCAL | DRM_BO_FLAG_CACHED |
+ bo->mem.flags = DRM_BO_FLAG_MEM_LOCAL | DRM_BO_FLAG_CACHED |
DRM_BO_FLAG_MAPPABLE;
bo->mem.mask = DRM_BO_FLAG_MEM_LOCAL | DRM_BO_FLAG_CACHED |
DRM_BO_FLAG_MAPPABLE;
atomic_inc(&bm->count);
- ret = drm_bo_new_mask(bo, mask, hint);
+ ret = drm_bo_new_mask(bo, mask, mask);
if (ret)
goto out_err;
@@ -1720,6 +1742,7 @@ int drm_bo_create_ioctl(struct drm_device *dev, void *data, struct drm_file *fil
struct drm_bo_create_req *req = &arg->d.req;
struct drm_bo_info_rep *rep = &arg->d.rep;
struct drm_buffer_object *entry;
+ enum drm_bo_type bo_type;
int ret = 0;
DRM_DEBUG("drm_bo_create_ioctl: %dkb, %dkb align\n",
@@ -1730,8 +1753,13 @@ int drm_bo_create_ioctl(struct drm_device *dev, void *data, struct drm_file *fil
return -EINVAL;
}
+ bo_type = (req->buffer_start) ? drm_bo_type_user : drm_bo_type_dc;
+
+ if (bo_type == drm_bo_type_user)
+ req->mask &= ~DRM_BO_FLAG_SHAREABLE;
+
ret = drm_buffer_object_create(file_priv->head->dev,
- req->size, drm_bo_type_dc, req->mask,
+ req->size, bo_type, req->mask,
req->hint, req->page_alignment,
req->buffer_start, &entry);
if (ret)
@@ -2186,6 +2214,13 @@ int drm_bo_driver_finish(struct drm_device * dev)
DRM_DEBUG("Unfenced list was clean\n");
}
out:
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15))
+ unlock_page(bm->dummy_read_page);
+#else
+ ClearPageReserved(bm->dummy_read_page);
+#endif
+ __free_page(bm->dummy_read_page);
mutex_unlock(&dev->struct_mutex);
return ret;
}
@@ -2203,11 +2238,24 @@ int drm_bo_driver_init(struct drm_device * dev)
struct drm_buffer_manager *bm = &dev->bm;
int ret = -EINVAL;
+ bm->dummy_read_page = NULL;
drm_bo_init_lock(&bm->bm_lock);
mutex_lock(&dev->struct_mutex);
if (!driver)
goto out_unlock;
+ bm->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
+ if (!bm->dummy_read_page) {
+ ret = -ENOMEM;
+ goto out_unlock;
+ }
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15))
+ SetPageLocked(bm->dummy_read_page);
+#else
+ SetPageReserved(bm->dummy_read_page);
+#endif
+
/*
* Initialize the system memory buffer type.
* Other types need to be driver / IOCTL initialized.
@@ -2462,11 +2510,15 @@ void drm_bo_unmap_virtual(struct drm_buffer_object * bo)
static void drm_bo_takedown_vm_locked(struct drm_buffer_object * bo)
{
- struct drm_map_list *list = &bo->map_list;
+ struct drm_map_list *list;
drm_local_map_t *map;
struct drm_device *dev = bo->dev;
DRM_ASSERT_LOCKED(&dev->struct_mutex);
+ if (bo->type != drm_bo_type_dc)
+ return;
+
+ list = &bo->map_list;
if (list->user_token) {
drm_ht_remove_item(&dev->map_hash, &list->hash);
list->user_token = 0;
diff --git a/linux-core/drm_objects.h b/linux-core/drm_objects.h
index cea811eb..0a05e5fe 100644
--- a/linux-core/drm_objects.h
+++ b/linux-core/drm_objects.h
@@ -275,6 +275,8 @@ typedef struct drm_ttm_backend {
} drm_ttm_backend_t;
struct drm_ttm {
+ struct mm_struct *user_mm;
+ struct page *dummy_read_page;
struct page **pages;
uint32_t page_flags;
unsigned long num_pages;
@@ -300,6 +302,12 @@ extern void drm_ttm_fixup_caching(struct drm_ttm * ttm);
extern struct page *drm_ttm_get_page(struct drm_ttm * ttm, int index);
extern void drm_ttm_cache_flush(void);
extern int drm_ttm_populate(struct drm_ttm * ttm);
+extern int drm_ttm_set_user(struct drm_ttm *ttm,
+ struct task_struct *tsk,
+ int write,
+ unsigned long start,
+ unsigned long num_pages,
+ struct page *dummy_read_page);
/*
* Destroy a ttm. The user normally calls drmRmMap or a similar IOCTL to do this,
@@ -320,11 +328,15 @@ extern int drm_destroy_ttm(struct drm_ttm * ttm);
* Page flags.
*/
-#define DRM_TTM_PAGE_UNCACHED 0x01
-#define DRM_TTM_PAGE_USED 0x02
-#define DRM_TTM_PAGE_BOUND 0x04
-#define DRM_TTM_PAGE_PRESENT 0x08
-#define DRM_TTM_PAGE_VMALLOC 0x10
+#define DRM_TTM_PAGE_UNCACHED (1 << 0)
+#define DRM_TTM_PAGE_USED (1 << 1)
+#define DRM_TTM_PAGE_BOUND (1 << 2)
+#define DRM_TTM_PAGE_PRESENT (1 << 3)
+#define DRM_TTM_PAGE_VMALLOC (1 << 4)
+#define DRM_TTM_PAGE_USER (1 << 5)
+#define DRM_TTM_PAGE_USER_WRITE (1 << 6)
+#define DRM_TTM_PAGE_USER_DIRTY (1 << 7)
+#define DRM_TTM_PAGE_USER_DMA (1 << 8)
/***************************************************
* Buffer objects. (drm_bo.c, drm_bo_move.c)
@@ -447,6 +459,7 @@ struct drm_buffer_manager {
uint32_t fence_type;
unsigned long cur_pages;
atomic_t count;
+ struct page *dummy_read_page;
};
struct drm_bo_driver {
diff --git a/linux-core/drm_ttm.c b/linux-core/drm_ttm.c
index fd03f6e8..4d51f9fe 100644
--- a/linux-core/drm_ttm.c
+++ b/linux-core/drm_ttm.c
@@ -139,15 +139,74 @@ static int drm_set_caching(struct drm_ttm * ttm, int noncached)
return 0;
}
+
+static void drm_ttm_free_user_pages(struct drm_ttm *ttm)
+{
+ struct mm_struct *mm = ttm->user_mm;
+ int write;
+ int dirty;
+ struct page *page;
+ int i;
+
+ BUG_ON(!(ttm->page_flags & DRM_TTM_PAGE_USER));
+ write = ((ttm->page_flags & DRM_TTM_PAGE_USER_WRITE) != 0);
+ dirty = ((ttm->page_flags & DRM_TTM_PAGE_USER_DIRTY) != 0);
+
+ down_read(&mm->mmap_sem);
+ for (i=0; i<ttm->num_pages; ++i) {
+ page = ttm->pages[i];
+ if (page == NULL)
+ continue;
+
+ if (page == ttm->dummy_read_page) {
+ BUG_ON(write);
+ continue;
+ }
+
+ if (write && dirty && !PageReserved(page))
+ SetPageDirty(page);
+
+ ttm->pages[i] = NULL;
+ page_cache_release(page);
+ }
+ up_read(&mm->mmap_sem);
+}
+
+static void drm_ttm_free_alloced_pages(struct drm_ttm *ttm)
+{
+ int i;
+ struct drm_buffer_manager *bm = &ttm->dev->bm;
+ struct page **cur_page;
+
+ for (i = 0; i < ttm->num_pages; ++i) {
+ cur_page = ttm->pages + i;
+ if (*cur_page) {
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15))
+ unlock_page(*cur_page);
+#else
+ ClearPageReserved(*cur_page);
+#endif
+ if (page_count(*cur_page) != 1) {
+ DRM_ERROR("Erroneous page count. "
+ "Leaking pages.\n");
+ }
+ if (page_mapped(*cur_page)) {
+ DRM_ERROR("Erroneous map count. "
+ "Leaking page mappings.\n");
+ }
+ __free_page(*cur_page);
+ drm_free_memctl(PAGE_SIZE);
+ --bm->cur_pages;
+ }
+ }
+}
+
/*
* Free all resources associated with a ttm.
*/
int drm_destroy_ttm(struct drm_ttm * ttm)
{
-
- int i;
- struct page **cur_page;
struct drm_ttm_backend *be;
if (!ttm)
@@ -160,31 +219,14 @@ int drm_destroy_ttm(struct drm_ttm * ttm)
}
if (ttm->pages) {
- struct drm_buffer_manager *bm = &ttm->dev->bm;
if (ttm->page_flags & DRM_TTM_PAGE_UNCACHED)
drm_set_caching(ttm, 0);
- for (i = 0; i < ttm->num_pages; ++i) {
- cur_page = ttm->pages + i;
- if (*cur_page) {
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15))
- unlock_page(*cur_page);
-#else
- ClearPageReserved(*cur_page);
-#endif
- if (page_count(*cur_page) != 1) {
- DRM_ERROR("Erroneous page count. "
- "Leaking pages.\n");
- }
- if (page_mapped(*cur_page)) {
- DRM_ERROR("Erroneous map count. "
- "Leaking page mappings.\n");
- }
- __free_page(*cur_page);
- drm_free_memctl(PAGE_SIZE);
- --bm->cur_pages;
- }
- }
+ if (ttm->page_flags & DRM_TTM_PAGE_USER)
+ drm_ttm_free_user_pages(ttm);
+ else
+ drm_ttm_free_alloced_pages(ttm);
+
ttm_free_pages(ttm);
}
@@ -209,6 +251,49 @@ struct page *drm_ttm_get_page(struct drm_ttm * ttm, int index)
}
EXPORT_SYMBOL(drm_ttm_get_page);
+
+
+
+int drm_ttm_set_user(struct drm_ttm *ttm,
+ struct task_struct *tsk,
+ int write,
+ unsigned long start,
+ unsigned long num_pages,
+ struct page *dummy_read_page)
+{
+ struct mm_struct *mm = tsk->mm;
+ int ret;
+ int i;
+
+ BUG_ON(num_pages != ttm->num_pages);
+
+ ttm->user_mm = mm;
+ ttm->dummy_read_page = dummy_read_page;
+ ttm->page_flags = DRM_TTM_PAGE_USER |
+ ((write) ? DRM_TTM_PAGE_USER_WRITE : 0);
+
+
+ down_read(&mm->mmap_sem);
+ ret = get_user_pages(tsk, mm, start, num_pages,
+ write, 0, ttm->pages, NULL);
+ up_read(&mm->mmap_sem);
+
+ if (ret != num_pages && write) {
+ drm_ttm_free_user_pages(ttm);
+ return -ENOMEM;
+ }
+
+ for (i=0; i<num_pages; ++i) {
+ if (ttm->pages[i] == NULL) {
+ ttm->pages[i] = ttm->dummy_read_page;
+ }
+ }
+
+ return 0;
+}
+
+
+
int drm_ttm_populate(struct drm_ttm * ttm)
{
struct page *page;
@@ -340,7 +425,8 @@ int drm_bind_ttm(struct drm_ttm * ttm, struct drm_bo_mem_reg *bo_mem)
}
ttm->state = ttm_bound;
-
+ if (ttm->page_flags & DRM_TTM_PAGE_USER)
+ ttm->page_flags |= DRM_TTM_PAGE_USER_DIRTY;
return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 15:22:03 +0000