#include <linux/config.h>
#include "drmP.h"
-#include <linux/vmalloc.h>
-
-#include <asm/agp.h>
-#include <asm/tlbflush.h>
/* Cut down version of drm_memory_debug.h, which used to be called
* drm_memory.h. If you want the debug functionality, change 0 to 1
*/
#define DEBUG_MEMORY 0
-#if __REALLY_HAVE_AGP
-
-/*
- * 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)
-{
- 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);
-
- 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);
- if (!addr)
- return NULL;
-
- flush_tlb_kernel_range((unsigned long) addr, (unsigned long) addr + size);
- return addr;
-}
-
-static inline unsigned long
-drm_follow_page (void *vaddr)
-{
- pgd_t *pgd = pgd_offset_k((unsigned long) vaddr);
- pmd_t *pmd = pmd_offset(pgd, (unsigned long) vaddr);
- pte_t *ptep = pte_offset_kernel(pmd, (unsigned long) vaddr);
- return pte_pfn(*ptep) << PAGE_SHIFT;
-}
-
-#else /* !__REALLY_HAVE_AGP */
-
-static inline void *
-agp_remap (unsigned long offset, unsigned long size, drm_device_t *dev)
-{
- return NULL;
-}
-
-#endif /* !__REALLY_HAVE_AGP */
-
-static inline void *drm_ioremap(unsigned long offset, unsigned long size, drm_device_t *dev)
-{
- int remap_aperture = 0;
-
-#if __REALLY_HAVE_AGP
- if (dev->agp->cant_use_aperture) {
- drm_map_t *map = drm_lookup_map(offset, size, dev);
-
- if (map && map->type == _DRM_AGP)
- remap_aperture = 1;
- }
-#endif
- if (remap_aperture)
- return agp_remap(offset, size, dev);
- else
- return ioremap(offset, size);
-}
-
-static inline void *drm_ioremap_nocache(unsigned long offset, unsigned long size,
- drm_device_t *dev)
-{
- int remap_aperture = 0;
-
-#if __REALLY_HAVE_AGP
- if (dev->agp->cant_use_aperture) {
- drm_map_t *map = drm_lookup_map(offset, size, dev);
-
- if (map && map->type == _DRM_AGP)
- remap_aperture = 1;
- }
-#endif
- if (remap_aperture)
- return agp_remap(offset, size, dev);
- else
- return ioremap_nocache(offset, size);
-}
-
-static inline void drm_ioremapfree(void *pt, unsigned long size, drm_device_t *dev)
-{
- int unmap_aperture = 0;
-#if __REALLY_HAVE_AGP
- /*
- * 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 (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)
- unmap_aperture = 1;
- }
-#endif
- if (unmap_aperture)
- vunmap(pt);
- else
- iounmap(pt);
-}
#if DEBUG_MEMORY
#include "drm_memory_debug.h"
free_pages(address, order);
}
-void *DRM(ioremap)(unsigned long offset, unsigned long size, drm_device_t *dev)
+void *DRM(ioremap)(unsigned long offset, unsigned long size)
{
- return drm_ioremap(offset, size, dev);
+ return ioremap(offset, size);
}
-void *DRM(ioremap_nocache)(unsigned long offset, unsigned long size, drm_device_t *dev)
+void *DRM(ioremap_nocache)(unsigned long offset, unsigned long size)
{
- return drm_ioremap_nocache(offset, size, dev);
+ return ioremap_nocache(offset, size);
}
-void DRM(ioremapfree)(void *pt, unsigned long size, drm_device_t *dev)
+void DRM(ioremapfree)(void *pt, unsigned long size)
{
- drm_ioremapfree(pt, size, dev);
+ iounmap(pt);
}
#if __REALLY_HAVE_AGP
projects / linux-flexiantxendom0-3.2.10.git / blobdiff