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>

6 files changed, 25 insertions, 195 deletions

diff --git a/drivers/char/drm/drmP.h b/drivers/char/drm/drmP.h
index 6dcdceb81203..63042ca9fffe 100644
--- a/drivers/char/drm/drmP.h
+++ b/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)
diff --git a/drivers/char/drm/drm_bufs.c b/drivers/char/drm/drm_bufs.c
index 1f74fb49fa78..d917c8cb8a36 100644
--- a/drivers/char/drm/drm_bufs.c
+++ b/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) {
diff --git a/drivers/char/drm/drm_memory.c b/drivers/char/drm/drm_memory.c
index 5681cae1d404..92a867082376 100644
--- a/drivers/char/drm/drm_memory.c
+++ b/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 */
diff --git a/drivers/char/drm/drm_memory.h b/drivers/char/drm/drm_memory.h
index f1b97aff10cf..63e425b5ea82 100644
--- a/drivers/char/drm/drm_memory.h
+++ b/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);
diff --git a/drivers/char/drm/drm_memory_debug.h b/drivers/char/drm/drm_memory_debug.h
index 74581af806e1..6463271deea8 100644
--- a/drivers/char/drm/drm_memory_debug.h
+++ b/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) {
diff --git a/drivers/char/drm/drm_vm.c b/drivers/char/drm/drm_vm.c
index b9cfc077f6bc..4e480583a27f 100644
--- a/drivers/char/drm/drm_vm.c
+++ b/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);