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authorJesse Barnes <jbarnes@virtuousgeek.org>2008-11-05 10:31:53 -0800
committerDave Airlie <airlied@linux.ie>2008-12-29 17:47:22 +1000
commita2c0a97b784f837300f7b0869c82ab712c600952 (patch)
treeaca1cdf3d32e1cfa7387350483f6a70c74a24ffd /include/drm
parenta9587470f753d670d910293ecbf1c7b66c99de50 (diff)
drm: GEM mmap support
Add core support for mapping of GEM objects. Drivers should provide a vm_operations_struct if they want to support page faulting of objects. The code for handling GEM object offsets was taken from TTM, which was written by Thomas Hellström. Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'include/drm')
-rw-r--r--include/drm/drm.h1
-rw-r--r--include/drm/drmP.h21
2 files changed, 22 insertions, 0 deletions
diff --git a/include/drm/drm.h b/include/drm/drm.h
index 3fb173c5af3..3a66252456b 100644
--- a/include/drm/drm.h
+++ b/include/drm/drm.h
@@ -173,6 +173,7 @@ enum drm_map_type {
_DRM_AGP = 3, /**< AGP/GART */
_DRM_SCATTER_GATHER = 4, /**< Scatter/gather memory for PCI DMA */
_DRM_CONSISTENT = 5, /**< Consistent memory for PCI DMA */
+ _DRM_GEM = 6, /**< GEM object */
};
/**
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index c9cc618dbcf..ae42a6a5c24 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -528,6 +528,7 @@ struct drm_map_list {
struct drm_map *map; /**< mapping */
uint64_t user_token;
struct drm_master *master;
+ struct drm_mm_node *file_offset_node; /**< fake offset */
};
typedef struct drm_map drm_local_map_t;
@@ -568,6 +569,14 @@ struct drm_ati_pcigart_info {
};
/**
+ * GEM specific mm private for tracking GEM objects
+ */
+struct drm_gem_mm {
+ struct drm_mm offset_manager; /**< Offset mgmt for buffer objects */
+ struct drm_open_hash offset_hash; /**< User token hash table for maps */
+};
+
+/**
* This structure defines the drm_mm memory object, which will be used by the
* DRM for its buffer objects.
*/
@@ -584,6 +593,9 @@ struct drm_gem_object {
/** File representing the shmem storage */
struct file *filp;
+ /* Mapping info for this object */
+ struct drm_map_list map_list;
+
/**
* Size of the object, in bytes. Immutable over the object's
* lifetime.
@@ -758,6 +770,9 @@ struct drm_driver {
int (*gem_init_object) (struct drm_gem_object *obj);
void (*gem_free_object) (struct drm_gem_object *obj);
+ /* Driver private ops for this object */
+ struct vm_operations_struct *gem_vm_ops;
+
int major;
int minor;
int patchlevel;
@@ -910,6 +925,8 @@ struct drm_device {
struct drm_sg_mem *sg; /**< Scatter gather memory */
int num_crtcs; /**< Number of CRTCs on this device */
void *dev_private; /**< device private data */
+ void *mm_private;
+ struct address_space *dev_mapping;
struct drm_sigdata sigdata; /**< For block_all_signals */
sigset_t sigmask;
@@ -1026,6 +1043,8 @@ extern int drm_release(struct inode *inode, struct file *filp);
/* Mapping support (drm_vm.h) */
extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
+extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
+extern void drm_vm_open_locked(struct vm_area_struct *vma);
extern unsigned long drm_core_get_map_ofs(struct drm_map * map);
extern unsigned long drm_core_get_reg_ofs(struct drm_device *dev);
extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
@@ -1287,10 +1306,12 @@ extern int drm_mm_add_space_to_tail(struct drm_mm *mm, unsigned long size);
/* Graphics Execution Manager library functions (drm_gem.c) */
int drm_gem_init(struct drm_device *dev);
+void drm_gem_destroy(struct drm_device *dev);
void drm_gem_object_free(struct kref *kref);
struct drm_gem_object *drm_gem_object_alloc(struct drm_device *dev,
size_t size);
void drm_gem_object_handle_free(struct kref *kref);
+int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
static inline void
drm_gem_object_reference(struct drm_gem_object *obj)