-/**
- * \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.
* OTHER DEALINGS IN THE SOFTWARE.
*/
-#include <linux/config.h>
#include <linux/highmem.h>
+#include <linux/vmalloc.h>
#include "drmP.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
- * below.
+ * drm_memory.h.
*/
-#define DEBUG_MEMORY 0
-#if __REALLY_HAVE_AGP
+#if __OS_HAS_AGP
#include <linux/vmalloc.h>
# endif
#endif
-#include <asm/tlbflush.h>
-
-/*
- * 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)
+static inline unsigned long drm_follow_page(void *vaddr)
{
- 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);
-
-#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);
- pmd_t *pmd = pmd_offset(pgd, (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;
}
-#endif /* __REALLY_HAVE_AGP */
-
-static inline void *drm_ioremap(unsigned long offset, unsigned long size, drm_device_t *dev)
-{
-#if __REALLY_HAVE_AGP
- if (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);
- }
-#endif
-
- return ioremap(offset, size);
-}
-
-static inline void *drm_ioremap_nocache(unsigned long offset, unsigned long size,
- drm_device_t *dev)
-{
-#if __REALLY_HAVE_AGP
- if (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);
- }
-#endif
-
- return ioremap_nocache(offset, size);
-}
+#else /* __OS_HAS_AGP */
-static inline void drm_ioremapfree(void *pt, unsigned long size, drm_device_t *dev)
-{
-#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 && 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;
- }
- }
-#endif
-
- iounmap(pt);
-}
-
-#if DEBUG_MEMORY
-#include "drm_memory_debug.h"
-#else
-
-/** No-op. */
-void DRM(mem_init)(void)
-{
-}
-
-/**
- * Called when "/proc/dri/%dev%/mem" is read.
- *
- * \param buf output buffer.
- * \param start start of output data.
- * \param offset requested start offset.
- * \param len requested number of bytes.
- * \param eof whether there is no more data to return.
- * \param data private data.
- * \return number of written bytes.
- *
- * No-op.
- */
-int DRM(mem_info)(char *buf, char **start, off_t offset,
- int len, int *eof, void *data)
+static inline unsigned long drm_follow_page(void *vaddr)
{
return 0;
}
-/** Wrapper around kmalloc() */
-void *DRM(alloc)(size_t size, int area)
-{
- return kmalloc(size, GFP_KERNEL);
-}
-
-/** Wrapper around kmalloc() */
-void *DRM(calloc)(size_t size, size_t nmemb, int area)
-{
- void *addr;
-
- addr = kmalloc(size * nmemb, GFP_KERNEL);
- if (addr != NULL)
- memset((void *)addr, 0, size * nmemb);
-
- return addr;
-}
-
-/** Wrapper around kmalloc() and kfree() */
-void *DRM(realloc)(void *oldpt, size_t oldsize, size_t size, int area)
-{
- void *pt;
-
- if (!(pt = kmalloc(size, GFP_KERNEL))) return NULL;
- if (oldpt && oldsize) {
- memcpy(pt, oldpt, oldsize);
- kfree(oldpt);
- }
- return pt;
-}
-
-/** Wrapper around kfree() */
-void DRM(free)(void *pt, size_t size, int area)
-{
- kfree(pt);
-}
-
-/**
- * Allocate pages.
- *
- * \param order size order.
- * \param area memory area. (Not used.)
- * \return page address on success, or zero on failure.
- *
- * Allocate and reserve free pages.
- */
-unsigned long DRM(alloc_pages)(int order, int area)
-{
- unsigned long address;
- unsigned long bytes = PAGE_SIZE << order;
- unsigned long addr;
- unsigned int sz;
-
- address = __get_free_pages(GFP_KERNEL, order);
- if (!address)
- return 0;
-
- /* Zero */
- memset((void *)address, 0, bytes);
-
- /* Reserve */
- for (addr = address, sz = bytes;
- sz > 0;
- addr += PAGE_SIZE, sz -= PAGE_SIZE) {
- SetPageReserved(virt_to_page(addr));
- }
-
- return address;
-}
-
-/**
- * Free pages.
- *
- * \param address address of the pages to free.
- * \param order size order.
- * \param area memory area. (Not used.)
- *
- * Unreserve and free pages allocated by alloc_pages().
- */
-void DRM(free_pages)(unsigned long address, int order, int area)
-{
- unsigned long bytes = PAGE_SIZE << order;
- unsigned long addr;
- unsigned int sz;
-
- if (!address)
- return;
-
- /* Unreserve */
- for (addr = address, sz = bytes;
- sz > 0;
- addr += PAGE_SIZE, sz -= PAGE_SIZE) {
- ClearPageReserved(virt_to_page(addr));
- }
-
- free_pages(address, order);
-}
-
-/** Wrapper around drm_ioremap() */
-void *DRM(ioremap)(unsigned long offset, unsigned long size, drm_device_t *dev)
-{
- return drm_ioremap(offset, size, dev);
-}
-
-/** Wrapper around drm_ioremap_nocache() */
-void *DRM(ioremap_nocache)(unsigned long offset, unsigned long size, drm_device_t *dev)
-{
- return drm_ioremap_nocache(offset, size, dev);
-}
-
-/** Wrapper around drm_iounmap() */
-void DRM(ioremapfree)(void *pt, unsigned long size, drm_device_t *dev)
-{
- drm_ioremapfree(pt, size, dev);
-}
-
-#if __REALLY_HAVE_AGP
-/** Wrapper around agp_allocate_memory() */
-DRM_AGP_MEM *DRM(alloc_agp)(int pages, u32 type)
-{
- return DRM(agp_allocate_memory)(pages, type);
-}
-
-/** Wrapper around agp_free_memory() */
-int DRM(free_agp)(DRM_AGP_MEM *handle, int pages)
-{
- return DRM(agp_free_memory)(handle) ? 0 : -EINVAL;
-}
+#endif
-/** Wrapper around agp_bind_memory() */
-int DRM(bind_agp)(DRM_AGP_MEM *handle, unsigned int start)
-{
- return DRM(agp_bind_memory)(handle, start);
-}
+void *drm_ioremap(unsigned long offset, unsigned long size,
+ drm_device_t * dev);
-/** Wrapper around agp_unbind_memory() */
-int DRM(unbind_agp)(DRM_AGP_MEM *handle)
-{
- return DRM(agp_unbind_memory)(handle);
-}
-#endif /* agp */
-#endif /* debug_memory */
+void drm_ioremapfree(void *pt, unsigned long size,
+ drm_device_t * dev);
git://git.onelab.eu / linux-2.6.git / blobdiff