diff options
Diffstat (limited to 'linux-core/drm_vm.c')
| -rw-r--r-- | linux-core/drm_vm.c | 74 |
1 files changed, 70 insertions, 4 deletions
diff --git a/linux-core/drm_vm.c b/linux-core/drm_vm.c index fb51926b..771c11bd 100644 --- a/linux-core/drm_vm.c +++ b/linux-core/drm_vm.c @@ -50,6 +50,12 @@ struct vm_operations_struct drm_vm_dma_ops = { close: DRM(vm_close), }; +struct vm_operations_struct drm_vm_sg_ops = { + nopage: DRM(vm_sg_nopage), + open: DRM(vm_open), + close: DRM(vm_close), +}; + #if LINUX_VERSION_CODE < 0x020317 unsigned long DRM(vm_nopage)(struct vm_area_struct *vma, unsigned long address, @@ -93,7 +99,7 @@ struct page *DRM(vm_shm_nopage)(struct vm_area_struct *vma, offset = address - vma->vm_start; i = (unsigned long)map->handle + offset; /* We have to walk page tables here because we need large SAREA's, and - * they need to be virtually contigious in kernel space. + * they need to be virtually contiguous in kernel space. */ pgd = pgd_offset_k( i ); if( !pgd_present( *pgd ) ) return NOPAGE_OOM; @@ -187,6 +193,7 @@ void DRM(vm_shm_close)(struct vm_area_struct *vma) vfree(map->handle); break; case _DRM_AGP: + case _DRM_SCATTER_GATHER: break; } DRM(free)(map, sizeof(*map), DRM_MEM_MAPS); @@ -230,6 +237,48 @@ struct page *DRM(vm_dma_nopage)(struct vm_area_struct *vma, #endif } +#if LINUX_VERSION_CODE < 0x020317 +unsigned long DRM(vm_sg_nopage)(struct vm_area_struct *vma, + unsigned long address, + int write_access) +#else + /* Return type changed in 2.3.23 */ +struct page *DRM(vm_sg_nopage)(struct vm_area_struct *vma, + unsigned long address, + int write_access) +#endif +{ +#if LINUX_VERSION_CODE >= 0x020300 + drm_map_t *map = (drm_map_t *)vma->vm_private_data; +#else + drm_map_t *map = (drm_map_t *)vma->vm_pte; +#endif + drm_file_t *priv = vma->vm_file->private_data; + drm_device_t *dev = priv->dev; + drm_sg_mem_t *entry = dev->sg; + unsigned long offset; + unsigned long map_offset; + unsigned long page_offset; + struct page *page; + + if (!entry) return NOPAGE_SIGBUS; /* Error */ + if (address > vma->vm_end) return NOPAGE_SIGBUS; /* Disallow mremap */ + if (!entry->pagelist) return NOPAGE_OOM ; /* Nothing allocated */ + + + offset = address - vma->vm_start; + map_offset = map->offset - dev->sg->handle; + page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT); + page = entry->pagelist[page_offset]; + atomic_inc(&page->count); /* Dec. by kernel */ + +#if LINUX_VERSION_CODE < 0x020317 + return (unsigned long)virt_to_phys(page->virtual); +#else + return page; +#endif +} + void DRM(vm_open)(struct vm_area_struct *vma) { drm_file_t *priv = vma->vm_file->private_data; @@ -322,6 +371,7 @@ int DRM(mmap)(struct file *filp, struct vm_area_struct *vma) drm_device_t *dev = priv->dev; drm_map_t *map = NULL; drm_map_list_t *r_list; + unsigned long offset = 0; struct list_head *list; DRM_DEBUG("start = 0x%lx, end = 0x%lx, offset = 0x%lx\n", @@ -374,19 +424,26 @@ int DRM(mmap)(struct file *filp, struct vm_area_struct *vma) } #elif defined(__ia64__) if (map->type != _DRM_AGP) - vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); + vma->vm_page_prot = + pgprot_writecombine(vma->vm_page_prot); +#elif defined(__powerpc__) + pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE | _PAGE_GUARDED; #endif vma->vm_flags |= VM_IO; /* not in core dump */ } +#ifdef __alpha__ + offset = dev->hose->dense_mem_base - + dev->hose->mem_space->start; +#endif if (remap_page_range(vma->vm_start, - VM_OFFSET(vma), + VM_OFFSET(vma) + offset, vma->vm_end - vma->vm_start, vma->vm_page_prot)) return -EAGAIN; 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)); + vma->vm_start, vma->vm_end, VM_OFFSET(vma) + offset); vma->vm_ops = &drm_vm_ops; break; case _DRM_SHM: @@ -400,6 +457,15 @@ int DRM(mmap)(struct file *filp, struct vm_area_struct *vma) DRM_KERNEL advisory is supported. */ vma->vm_flags |= VM_LOCKED; break; + case _DRM_SCATTER_GATHER: + vma->vm_ops = &drm_vm_sg_ops; +#if LINUX_VERSION_CODE >= 0x020300 + vma->vm_private_data = (void *)map; +#else + vma->vm_pte = (unsigned long)map; +#endif + vma->vm_flags |= VM_LOCKED; + break; default: return -EINVAL; /* This should never happen. */ } |