X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fchar%2Fdrm%2Fdrm_memory.h;h=714d9aedcff5dd38200eaf18dfcf029f1a36722c;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=422b94268709caeca426018fde8e9ccfc0748493;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git

diff --git a/drivers/char/drm/drm_memory.h b/drivers/char/drm/drm_memory.h
index 422b94268..714d9aedc 100644
--- a/drivers/char/drm/drm_memory.h
+++ b/drivers/char/drm/drm_memory.h
@@ -1,12 +1,12 @@
-/** 
- * \file drm_memory.h 
+/**
+ * \file drm_memory.h
  * Memory management wrappers for DRM
  *
  * \author Rickard E. (Rik) Faith <faith@valinux.com>
  * \author Gareth Hughes <gareth@valinux.com>
  */
 
-/* 
+/*
  * Created: Thu Feb  4 14:00:34 1999 by faith@valinux.com
  *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
@@ -40,7 +40,7 @@
 
 /**
  * Cut down version of drm_memory_debug.h, which used to be called
- * drm_memory.h.  
+ * drm_memory.h.
  */
 
 #if __OS_HAS_AGP
@@ -57,141 +57,26 @@
 # endif
 #endif
 
-/*
- * Find the drm_map that covers the range [offset, offset+size).
- */
-static inline 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 inline void *
-agp_remap (unsigned long offset, unsigned long size, drm_device_t *dev)
+static inline unsigned long drm_follow_page(void *vaddr)
 {
-	unsigned long *phys_addr_map, i, num_pages = PAGE_ALIGN(size) / PAGE_SIZE;
-	struct drm_agp_mem *agpmem;
-	struct page **page_map;
-	void *addr;
-
-	size = PAGE_ALIGN(size);
-
-#ifdef __alpha__
-	offset -= dev->hose->mem_space->start;
-#endif
-
-	for (agpmem = dev->agp->memory; agpmem; agpmem = agpmem->next)
-		if (agpmem->bound <= offset
-		    && (agpmem->bound + (agpmem->pages << PAGE_SHIFT)) >= (offset + size))
-			break;
-	if (!agpmem)
-		return NULL;
-
-	/*
-	 * OK, we're mapping AGP space on a chipset/platform on which memory accesses by
-	 * the CPU do not get remapped by the GART.  We fix this by using the kernel's
-	 * page-table instead (that's probably faster anyhow...).
-	 */
-	/* note: use vmalloc() because num_pages could be large... */
-	page_map = vmalloc(num_pages * sizeof(struct page *));
-	if (!page_map)
-		return NULL;
-
-	phys_addr_map = agpmem->memory->memory + (offset - agpmem->bound) / PAGE_SIZE;
-	for (i = 0; i < num_pages; ++i)
-		page_map[i] = pfn_to_page(phys_addr_map[i] >> PAGE_SHIFT);
-	addr = vmap(page_map, num_pages, VM_IOREMAP, PAGE_AGP);
-	vfree(page_map);
-
-	return addr;
-}
-
-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);
+	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 */
+#else				/* __OS_HAS_AGP */
 
-static inline drm_map_t *drm_lookup_map(unsigned long offset, unsigned long size, drm_device_t *dev)
+static inline unsigned long drm_follow_page(void *vaddr)
 {
-  return NULL;
-}
-
-static inline void *agp_remap(unsigned long offset, unsigned long size, drm_device_t *dev)
-{
-  return NULL;
-}
-
-static inline unsigned long drm_follow_page (void *vaddr)
-{
-  return 0;
+	return 0;
 }
 
 #endif
 
-static inline 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);
-}
-
-static inline void *drm_ioremap_nocache(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_nocache(offset, size);
-}
-
-static inline void drm_ioremapfree(void *pt, unsigned long size, drm_device_t *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);
-}
-
+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);