drm: remove drm_ioremap and drm_ioremapfree

hch originally submitted this for paravirt ops work, airlied took it
and cleaned up a lot of unused code caused by using this.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Airlie <airlied@linux.ie>

drivers/char/drm/drmP.h

@@ -843,9 +843,6 @@ extern void drm_mem_init(void);
 extern int drm_mem_info(char *buf, char **start, off_t offset,
 			int request, int *eof, void *data);
 extern void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area);
-extern void *drm_ioremap(unsigned long offset, unsigned long size,
-			 drm_device_t * dev);
-extern void drm_ioremapfree(void *pt, unsigned long size, drm_device_t * dev);
 
 extern DRM_AGP_MEM *drm_alloc_agp(drm_device_t * dev, int pages, u32 type);
 extern int drm_free_agp(DRM_AGP_MEM * handle, int pages);
@@ -1059,27 +1056,8 @@ extern drm_mm_node_t *drm_mm_search_free(const drm_mm_t *mm, unsigned long size,
 extern int drm_mm_init(drm_mm_t *mm, unsigned long start, unsigned long size);
 extern void drm_mm_takedown(drm_mm_t *mm);
 
-/* Inline replacements for DRM_IOREMAP macros */
-static __inline__ void drm_core_ioremap(struct drm_map *map,
-					struct drm_device *dev)
-{
-	map->handle = drm_ioremap(map->offset, map->size, dev);
-}
-
-#if 0
-static __inline__ void drm_core_ioremap_nocache(struct drm_map *map,
-						struct drm_device *dev)
-{
-	map->handle = drm_ioremap_nocache(map->offset, map->size, dev);
-}
-#endif  /*  0  */
-
-static __inline__ void drm_core_ioremapfree(struct drm_map *map,
-					    struct drm_device *dev)
-{
-	if (map->handle && map->size)
-		drm_ioremapfree(map->handle, map->size, dev);
-}
+extern void drm_core_ioremap(struct drm_map *map, struct drm_device *dev);
+extern void drm_core_ioremapfree(struct drm_map *map, struct drm_device *dev);
 
 static __inline__ struct drm_map *drm_core_findmap(struct drm_device *dev,
 						   unsigned int token)

drivers/char/drm/drm_bufs.c

@@ -178,7 +178,7 @@ static int drm_addmap_core(drm_device_t * dev, unsigned int offset,
 			}
 		}
 		if (map->type == _DRM_REGISTERS)
-			map->handle = drm_ioremap(map->offset, map->size, dev);
+			map->handle = ioremap(map->offset, map->size);
 		break;
 
 	case _DRM_SHM:
@@ -238,7 +238,7 @@ static int drm_addmap_core(drm_device_t * dev, unsigned int offset,
 	list = drm_alloc(sizeof(*list), DRM_MEM_MAPS);
 	if (!list) {
 		if (map->type == _DRM_REGISTERS)
-			drm_ioremapfree(map->handle, map->size, dev);
+			iounmap(map->handle);
 		drm_free(map, sizeof(*map), DRM_MEM_MAPS);
 		return -EINVAL;
 	}
@@ -255,7 +255,7 @@ static int drm_addmap_core(drm_device_t * dev, unsigned int offset,
 	ret = drm_map_handle(dev, &list->hash, user_token, 0);
 	if (ret) {
 		if (map->type == _DRM_REGISTERS)
-			drm_ioremapfree(map->handle, map->size, dev);
+			iounmap(map->handle);
 		drm_free(map, sizeof(*map), DRM_MEM_MAPS);
 		drm_free(list, sizeof(*list), DRM_MEM_MAPS);
 		mutex_unlock(&dev->struct_mutex);
@@ -362,7 +362,7 @@ int drm_rmmap_locked(drm_device_t *dev, drm_local_map_t *map)
 
 	switch (map->type) {
 	case _DRM_REGISTERS:
-		drm_ioremapfree(map->handle, map->size, dev);
+		iounmap(map->handle);
 		/* FALLTHROUGH */
 	case _DRM_FRAME_BUFFER:
 		if (drm_core_has_MTRR(dev) && map->mtrr >= 0) {

drivers/char/drm/drm_memory.c

@@ -79,28 +79,6 @@ void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area)
 }
 
 #if __OS_HAS_AGP
-/*
- * Find the drm_map that covers the range [offset, offset+size).
- */
-static drm_map_t *drm_lookup_map(unsigned long offset,
-				 unsigned long size, drm_device_t * dev)
-{
-	struct list_head *list;
-	drm_map_list_t *r_list;
-	drm_map_t *map;
-
-	list_for_each(list, &dev->maplist->head) {
-		r_list = (drm_map_list_t *) list;
-		map = r_list->map;
-		if (!map)
-			continue;
-		if (map->offset <= offset
-		    && (offset + size) <= (map->offset + map->size))
-			return map;
-	}
-	return NULL;
-}
-
 static void *agp_remap(unsigned long offset, unsigned long size,
 		       drm_device_t * dev)
 {
@@ -169,13 +147,6 @@ int drm_unbind_agp(DRM_AGP_MEM * handle)
 }
 
 #else  /*  __OS_HAS_AGP  */
-
-static inline drm_map_t *drm_lookup_map(unsigned long offset,
-					unsigned long size, drm_device_t * dev)
-{
-	return NULL;
-}
-
 static inline void *agp_remap(unsigned long offset, unsigned long size,
 			      drm_device_t * dev)
 {
@@ -184,57 +155,28 @@ static inline void *agp_remap(unsigned long offset, unsigned long size,
 
 #endif				/* agp */
 
-void *drm_ioremap(unsigned long offset, unsigned long size,
-				drm_device_t * dev)
-{
-	if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture) {
-		drm_map_t *map = drm_lookup_map(offset, size, dev);
-
-		if (map && map->type == _DRM_AGP)
-			return agp_remap(offset, size, dev);
-	}
-	return ioremap(offset, size);
-}
-EXPORT_SYMBOL(drm_ioremap);
+#endif				/* debug_memory */
 
-#if 0
-void *drm_ioremap_nocache(unsigned long offset,
-					unsigned long size, drm_device_t * dev)
+void drm_core_ioremap(struct drm_map *map, struct drm_device *dev)
 {
-	if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture) {
-		drm_map_t *map = drm_lookup_map(offset, size, dev);
-
-		if (map && map->type == _DRM_AGP)
-			return agp_remap(offset, size, dev);
-	}
-	return ioremap_nocache(offset, size);
+	if (drm_core_has_AGP(dev) &&
+	    dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
+		map->handle = agp_remap(map->offset, map->size, dev);
+	else
+		map->handle = ioremap(map->offset, map->size);
 }
-#endif  /*  0  */
+EXPORT_SYMBOL(drm_core_ioremap);
 
-void drm_ioremapfree(void *pt, unsigned long size,
-				   drm_device_t * dev)
+void drm_core_ioremapfree(struct drm_map *map, struct drm_device *dev)
 {
-	/*
-	 * This is a bit ugly.  It would be much cleaner if the DRM API would use separate
-	 * routines for handling mappings in the AGP space.  Hopefully this can be done in
-	 * a future revision of the interface...
-	 */
-	if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture
-	    && ((unsigned long)pt >= VMALLOC_START
-		&& (unsigned long)pt < VMALLOC_END)) {
-		unsigned long offset;
-		drm_map_t *map;
-
-		offset = drm_follow_page(pt) | ((unsigned long)pt & ~PAGE_MASK);
-		map = drm_lookup_map(offset, size, dev);
-		if (map && map->type == _DRM_AGP) {
-			vunmap(pt);
-			return;
-		}
-	}
-
-	iounmap(pt);
+	if (!map->handle || !map->size)
+		return;
+
+	if (drm_core_has_AGP(dev) &&
+	    dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
+		vunmap(map->handle);
+	else
+		iounmap(map->handle);
 }
-EXPORT_SYMBOL(drm_ioremapfree);
+EXPORT_SYMBOL(drm_core_ioremapfree);
 
-#endif				/* debug_memory */

drivers/char/drm/drm_memory.h

@@ -56,26 +56,6 @@
 # endif
 #endif
 
-static inline unsigned long drm_follow_page(void *vaddr)
-{
-	pgd_t *pgd = pgd_offset_k((unsigned long)vaddr);
-	pud_t *pud = pud_offset(pgd, (unsigned long)vaddr);
-	pmd_t *pmd = pmd_offset(pud, (unsigned long)vaddr);
-	pte_t *ptep = pte_offset_kernel(pmd, (unsigned long)vaddr);
-	return pte_pfn(*ptep) << PAGE_SHIFT;
-}
-
 #else				/* __OS_HAS_AGP */
 
-static inline unsigned long drm_follow_page(void *vaddr)
-{
-	return 0;
-}
-
 #endif
-
-void *drm_ioremap(unsigned long offset, unsigned long size,
-				drm_device_t * dev);
-
-void drm_ioremapfree(void *pt, unsigned long size,
-				   drm_device_t * dev);

drivers/char/drm/drm_memory_debug.h

@@ -205,76 +205,6 @@ void drm_free (void *pt, size_t size, int area) {
 	}
 }
 
-void *drm_ioremap (unsigned long offset, unsigned long size,
-		    drm_device_t * dev) {
-	void *pt;
-
-	if (!size) {
-		DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
-			      "Mapping 0 bytes at 0x%08lx\n", offset);
-		return NULL;
-	}
-
-	if (!(pt = drm_ioremap(offset, size, dev))) {
-		spin_lock(&drm_mem_lock);
-		++drm_mem_stats[DRM_MEM_MAPPINGS].fail_count;
-		spin_unlock(&drm_mem_lock);
-		return NULL;
-	}
-	spin_lock(&drm_mem_lock);
-	++drm_mem_stats[DRM_MEM_MAPPINGS].succeed_count;
-	drm_mem_stats[DRM_MEM_MAPPINGS].bytes_allocated += size;
-	spin_unlock(&drm_mem_lock);
-	return pt;
-}
-
-#if 0
-void *drm_ioremap_nocache (unsigned long offset, unsigned long size,
-			    drm_device_t * dev) {
-	void *pt;
-
-	if (!size) {
-		DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
-			      "Mapping 0 bytes at 0x%08lx\n", offset);
-		return NULL;
-	}
-
-	if (!(pt = drm_ioremap_nocache(offset, size, dev))) {
-		spin_lock(&drm_mem_lock);
-		++drm_mem_stats[DRM_MEM_MAPPINGS].fail_count;
-		spin_unlock(&drm_mem_lock);
-		return NULL;
-	}
-	spin_lock(&drm_mem_lock);
-	++drm_mem_stats[DRM_MEM_MAPPINGS].succeed_count;
-	drm_mem_stats[DRM_MEM_MAPPINGS].bytes_allocated += size;
-	spin_unlock(&drm_mem_lock);
-	return pt;
-}
-#endif  /*  0  */
-
-void drm_ioremapfree (void *pt, unsigned long size, drm_device_t * dev) {
-	int alloc_count;
-	int free_count;
-
-	if (!pt)
-		DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
-			      "Attempt to free NULL pointer\n");
-	else
-		drm_ioremapfree(pt, size, dev);
-
-	spin_lock(&drm_mem_lock);
-	drm_mem_stats[DRM_MEM_MAPPINGS].bytes_freed += size;
-	free_count = ++drm_mem_stats[DRM_MEM_MAPPINGS].free_count;
-	alloc_count = drm_mem_stats[DRM_MEM_MAPPINGS].succeed_count;
-	spin_unlock(&drm_mem_lock);
-	if (free_count > alloc_count) {
-		DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
-			      "Excess frees: %d frees, %d allocs\n",
-			      free_count, alloc_count);
-	}
-}
-
 #if __OS_HAS_AGP
 
 DRM_AGP_MEM *drm_alloc_agp (drm_device_t *dev, int pages, u32 type) {

drivers/char/drm/drm_vm.c

@@ -227,7 +227,7 @@ static void drm_vm_shm_close(struct vm_area_struct *vma)
 							   map->size);
 					DRM_DEBUG("mtrr_del = %d\n", retcode);
 				}
-				drm_ioremapfree(map->handle, map->size, dev);
+				iounmap(map->handle);
 				break;
 			case _DRM_SHM:
 				vfree(map->handle);