drm: Split drm_map and drm_local_map

Once upon a time, the DRM made the distinction between the drm_map
data structure exchanged with user space and the drm_local_map used
in the kernel.

For some reasons, while the BSD port still has that "feature", the
linux part abused drm_map for kernel internal usage as the local
map only existed as a typedef of the struct drm_map.

This patch fixes it by declaring struct drm_local_map separately
(though its content is currently identical to the userspace variant),
and changing the kernel code to only use that, except when it's a
user<->kernel interface (ie. ioctl).

This allows subsequent changes to the in-kernel format

I've also replaced the use of drm_local_map_t with struct drm_local_map
in a couple of places. Mostly by accident but they are the same (the
former is a typedef of the later) and I have some remote plans and
half finished patch to completely kill the drm_local_map_t typedef
so I left those bits in.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 30 insertions, 17 deletions

diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 34e1676b53d1..03a7c11cb24d 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -523,19 +523,32 @@ struct drm_mm {
 
 
 /**
+ * Kernel side of a mapping
+ */
+struct drm_local_map {
+        unsigned long offset;    /**< Requested physical address (0 for SAREA)*/
+        unsigned long size;      /**< Requested physical size (bytes) */
+        enum drm_map_type type;  /**< Type of memory to map */
+        enum drm_map_flags flags;        /**< Flags */
+        void *handle;            /**< User-space: "Handle" to pass to mmap() */
+                                 /**< Kernel-space: kernel-virtual address */
+        int mtrr;                /**< MTRR slot used */
+};
+
+typedef struct drm_local_map drm_local_map_t;
+
+/**
  * Mappings list
  */
 struct drm_map_list {
         struct list_head head;          /**< list head */
         struct drm_hash_item hash;
-        struct drm_map *map;                    /**< mapping */
+        struct drm_local_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;
-
 /**
  * Context handle list
  */
@@ -560,7 +573,7 @@ struct drm_ati_pcigart_info {
         dma_addr_t bus_addr;
         dma_addr_t table_mask;
         struct drm_dma_handle *table_handle;
-        drm_local_map_t mapping;
+        struct drm_local_map mapping;
         int table_size;
 };
 
@@ -747,7 +760,7 @@ struct drm_driver {
                                         struct drm_file *file_priv);
         void (*reclaim_buffers_idlelocked) (struct drm_device *dev,
                                             struct drm_file *file_priv);
-        unsigned long (*get_map_ofs) (struct drm_map * map);
+        unsigned long (*get_map_ofs) (struct drm_local_map * map);
         unsigned long (*get_reg_ofs) (struct drm_device *dev);
         void (*set_version) (struct drm_device *dev,
                              struct drm_set_version *sv);
@@ -932,7 +945,7 @@ struct drm_device {
         sigset_t sigmask;
 
         struct drm_driver *driver;
-        drm_local_map_t *agp_buffer_map;
+        struct drm_local_map *agp_buffer_map;
         unsigned int agp_buffer_token;
         struct drm_minor *control;              /**< Control node for card */
         struct drm_minor *primary;              /**< render type primary screen head */
@@ -1049,7 +1062,7 @@ extern int drm_release(struct inode *inode, struct file *filp);
 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_map_ofs(struct drm_local_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);
 
@@ -1155,11 +1168,11 @@ extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request
 extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
 extern int drm_addmap(struct drm_device *dev, unsigned int offset,
                       unsigned int size, enum drm_map_type type,
-                      enum drm_map_flags flags, drm_local_map_t ** map_ptr);
+                      enum drm_map_flags flags, struct drm_local_map **map_ptr);
 extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
                             struct drm_file *file_priv);
-extern int drm_rmmap(struct drm_device *dev, drm_local_map_t *map);
-extern int drm_rmmap_locked(struct drm_device *dev, drm_local_map_t *map);
+extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
+extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
 extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
                            struct drm_file *file_priv);
 extern int drm_addbufs(struct drm_device *dev, void *data,
@@ -1261,7 +1274,7 @@ extern struct proc_dir_entry *drm_proc_root;
 
 extern struct idr drm_minors_idr;
 
-extern drm_local_map_t *drm_getsarea(struct drm_device *dev);
+extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
 
                                 /* Proc support (drm_proc.h) */
 extern int drm_proc_init(struct drm_minor *minor, int minor_id,
@@ -1378,12 +1391,12 @@ int drm_gem_open_ioctl(struct drm_device *dev, void *data,
 void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
 void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
 
-extern void drm_core_ioremap(struct drm_map *map, struct drm_device *dev);
-extern void drm_core_ioremap_wc(struct drm_map *map, struct drm_device *dev);
-extern void drm_core_ioremapfree(struct drm_map *map, struct drm_device *dev);
+extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
+extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
+extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
 
-static __inline__ struct drm_map *drm_core_findmap(struct drm_device *dev,
-                                                   unsigned int token)
+static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
+                                                         unsigned int token)
 {
         struct drm_map_list *_entry;
         list_for_each_entry(_entry, &dev->maplist, head)
@@ -1410,7 +1423,7 @@ static __inline__ int drm_device_is_pcie(struct drm_device *dev)
         return pci_find_capability(dev->pdev, PCI_CAP_ID_EXP);
 }
 
-static __inline__ void drm_core_dropmap(struct drm_map *map)
+static __inline__ void drm_core_dropmap(struct drm_local_map *map)
 {
 }