drm: updated DRM map patch for 32/64 bit systems
I basically combined Paul's patches with additions that I had made
for PCI scatter gather.
I also tried more carefully to avoid problems with the same token
assigned multiple times while trying to use the base address in the
token if possible to gain as much backward compatibility as possible
for broken DRI clients.
From: Paul Mackerras <paulus@samba.org> and Egbert Eich <eich@suse.de>
Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/drm_vm.c b/drivers/char/drm/drm_vm.c
index 675d239..99b5c86 100644
--- a/drivers/char/drm/drm_vm.c
+++ b/drivers/char/drm/drm_vm.c
@@ -73,12 +73,13 @@
r_list = list_entry(list, drm_map_list_t, head);
map = r_list->map;
if (!map) continue;
- if (map->offset == VM_OFFSET(vma)) break;
+ if (r_list->user_token == VM_OFFSET(vma))
+ break;
}
if (map && map->type == _DRM_AGP) {
unsigned long offset = address - vma->vm_start;
- unsigned long baddr = VM_OFFSET(vma) + offset;
+ unsigned long baddr = map->offset + offset;
struct drm_agp_mem *agpmem;
struct page *page;
@@ -304,7 +305,7 @@
offset = address - vma->vm_start;
- map_offset = map->offset - dev->sg->handle;
+ map_offset = map->offset - (unsigned long)dev->sg->virtual;
page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT);
page = entry->pagelist[page_offset];
get_page(page);
@@ -568,13 +569,12 @@
for performance, even if the list was a
bit longer. */
list_for_each(list, &dev->maplist->head) {
- unsigned long off;
r_list = list_entry(list, drm_map_list_t, head);
map = r_list->map;
if (!map) continue;
- off = dev->driver->get_map_ofs(map);
- if (off == VM_OFFSET(vma)) break;
+ if (r_list->user_token == VM_OFFSET(vma))
+ break;
}
if (!map || ((map->flags&_DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN)))
@@ -613,7 +613,7 @@
/* fall through to _DRM_FRAME_BUFFER... */
case _DRM_FRAME_BUFFER:
case _DRM_REGISTERS:
- if (VM_OFFSET(vma) >= __pa(high_memory)) {
+ if (map->offset >= __pa(high_memory)) {
#if defined(__i386__) || defined(__x86_64__)
if (boot_cpu_data.x86 > 3 && map->type != _DRM_AGP) {
pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
@@ -636,12 +636,12 @@
offset = dev->driver->get_reg_ofs(dev);
#ifdef __sparc__
if (io_remap_pfn_range(DRM_RPR_ARG(vma) vma->vm_start,
- (VM_OFFSET(vma) + offset) >> PAGE_SHIFT,
+ (map->offset + offset) >> PAGE_SHIFT,
vma->vm_end - vma->vm_start,
vma->vm_page_prot))
#else
if (io_remap_pfn_range(vma, vma->vm_start,
- (VM_OFFSET(vma) + offset) >> PAGE_SHIFT,
+ (map->offset + offset) >> PAGE_SHIFT,
vma->vm_end - vma->vm_start,
vma->vm_page_prot))
#endif
@@ -649,7 +649,7 @@
DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx,"
" offset = 0x%lx\n",
map->type,
- vma->vm_start, vma->vm_end, VM_OFFSET(vma) + offset);
+ vma->vm_start, vma->vm_end, map->offset + offset);
vma->vm_ops = &drm_vm_ops;
break;
case _DRM_SHM: