forked from Minki/linux
drm: convert drm from nopage to fault.
Remove redundant vma range checks. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Airlie <airlied@linux.ie>
This commit is contained in:
Nick Piggin
Dave Airlie
parent
b39d50e53b
commit
ca0b07d9a9
@ -66,7 +66,7 @@ static pgprot_t drm_io_prot(uint32_t map_type, struct vm_area_struct *vma)
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}
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/**
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* \c nopage method for AGP virtual memory.
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* \c fault method for AGP virtual memory.
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*
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* \param vma virtual memory area.
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* \param address access address.
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@ -76,8 +76,7 @@ static pgprot_t drm_io_prot(uint32_t map_type, struct vm_area_struct *vma)
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* map, get the page, increment the use count and return it.
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*/
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#if __OS_HAS_AGP
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static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma,
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unsigned long address)
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static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
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{
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struct drm_file *priv = vma->vm_file->private_data;
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struct drm_device *dev = priv->head->dev;
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@ -89,19 +88,24 @@ static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma,
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* Find the right map
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*/
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if (!drm_core_has_AGP(dev))
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goto vm_nopage_error;
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goto vm_fault_error;
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if (!dev->agp || !dev->agp->cant_use_aperture)
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goto vm_nopage_error;
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goto vm_fault_error;
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if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash))
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goto vm_nopage_error;
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goto vm_fault_error;
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r_list = drm_hash_entry(hash, struct drm_map_list, hash);
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map = r_list->map;
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if (map && map->type == _DRM_AGP) {
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unsigned long offset = address - vma->vm_start;
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/*
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* Using vm_pgoff as a selector forces us to use this unusual
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* addressing scheme.
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*/
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unsigned long offset = (unsigned long)vmf->virtual_address -
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vma->vm_start;
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unsigned long baddr = map->offset + offset;
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struct drm_agp_mem *agpmem;
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struct page *page;
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@ -123,7 +127,7 @@ static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma,
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}
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if (!agpmem)
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goto vm_nopage_error;
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goto vm_fault_error;
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/*
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* Get the page, inc the use count, and return it
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@ -131,22 +135,21 @@ static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma,
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offset = (baddr - agpmem->bound) >> PAGE_SHIFT;
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page = virt_to_page(__va(agpmem->memory->memory[offset]));
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get_page(page);
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vmf->page = page;
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DRM_DEBUG
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("baddr = 0x%lx page = 0x%p, offset = 0x%lx, count=%d\n",
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baddr, __va(agpmem->memory->memory[offset]), offset,
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page_count(page));
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return page;
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return 0;
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}
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vm_nopage_error:
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return NOPAGE_SIGBUS; /* Disallow mremap */
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vm_fault_error:
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return VM_FAULT_SIGBUS; /* Disallow mremap */
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}
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#else /* __OS_HAS_AGP */
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static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma,
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unsigned long address)
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static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
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{
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return NOPAGE_SIGBUS;
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return VM_FAULT_SIGBUS;
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}
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#endif /* __OS_HAS_AGP */
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@ -160,28 +163,26 @@ static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma,
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* Get the mapping, find the real physical page to map, get the page, and
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* return it.
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*/
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static __inline__ struct page *drm_do_vm_shm_nopage(struct vm_area_struct *vma,
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unsigned long address)
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static int drm_do_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
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{
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struct drm_map *map = (struct drm_map *) vma->vm_private_data;
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unsigned long offset;
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unsigned long i;
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struct page *page;
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if (address > vma->vm_end)
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return NOPAGE_SIGBUS; /* Disallow mremap */
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if (!map)
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return NOPAGE_SIGBUS; /* Nothing allocated */
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return VM_FAULT_SIGBUS; /* Nothing allocated */
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offset = address - vma->vm_start;
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offset = (unsigned long)vmf->virtual_address - vma->vm_start;
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i = (unsigned long)map->handle + offset;
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page = vmalloc_to_page((void *)i);
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if (!page)
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return NOPAGE_SIGBUS;
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return VM_FAULT_SIGBUS;
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get_page(page);
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vmf->page = page;
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DRM_DEBUG("0x%lx\n", address);
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return page;
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DRM_DEBUG("shm_fault 0x%lx\n", offset);
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return 0;
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}
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/**
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@ -263,7 +264,7 @@ static void drm_vm_shm_close(struct vm_area_struct *vma)
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}
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/**
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* \c nopage method for DMA virtual memory.
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* \c fault method for DMA virtual memory.
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*
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* \param vma virtual memory area.
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* \param address access address.
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@ -271,8 +272,7 @@ static void drm_vm_shm_close(struct vm_area_struct *vma)
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*
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* Determine the page number from the page offset and get it from drm_device_dma::pagelist.
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*/
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static __inline__ struct page *drm_do_vm_dma_nopage(struct vm_area_struct *vma,
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unsigned long address)
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static int drm_do_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
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{
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struct drm_file *priv = vma->vm_file->private_data;
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struct drm_device *dev = priv->head->dev;
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@ -282,24 +282,23 @@ static __inline__ struct page *drm_do_vm_dma_nopage(struct vm_area_struct *vma,
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struct page *page;
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if (!dma)
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return NOPAGE_SIGBUS; /* Error */
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if (address > vma->vm_end)
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return NOPAGE_SIGBUS; /* Disallow mremap */
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return VM_FAULT_SIGBUS; /* Error */
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if (!dma->pagelist)
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return NOPAGE_SIGBUS; /* Nothing allocated */
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return VM_FAULT_SIGBUS; /* Nothing allocated */
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offset = address - vma->vm_start; /* vm_[pg]off[set] should be 0 */
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page_nr = offset >> PAGE_SHIFT;
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offset = (unsigned long)vmf->virtual_address - vma->vm_start; /* vm_[pg]off[set] should be 0 */
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page_nr = offset >> PAGE_SHIFT; /* page_nr could just be vmf->pgoff */
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page = virt_to_page((dma->pagelist[page_nr] + (offset & (~PAGE_MASK))));
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get_page(page);
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vmf->page = page;
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DRM_DEBUG("0x%lx (page %lu)\n", address, page_nr);
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return page;
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DRM_DEBUG("dma_fault 0x%lx (page %lu)\n", offset, page_nr);
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return 0;
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}
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/**
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* \c nopage method for scatter-gather virtual memory.
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* \c fault method for scatter-gather virtual memory.
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*
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* \param vma virtual memory area.
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* \param address access address.
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@ -307,8 +306,7 @@ static __inline__ struct page *drm_do_vm_dma_nopage(struct vm_area_struct *vma,
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*
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* Determine the map offset from the page offset and get it from drm_sg_mem::pagelist.
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*/
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static __inline__ struct page *drm_do_vm_sg_nopage(struct vm_area_struct *vma,
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unsigned long address)
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static int drm_do_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
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{
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struct drm_map *map = (struct drm_map *) vma->vm_private_data;
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struct drm_file *priv = vma->vm_file->private_data;
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@ -320,77 +318,64 @@ static __inline__ struct page *drm_do_vm_sg_nopage(struct vm_area_struct *vma,
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struct page *page;
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if (!entry)
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return NOPAGE_SIGBUS; /* Error */
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if (address > vma->vm_end)
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return NOPAGE_SIGBUS; /* Disallow mremap */
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return VM_FAULT_SIGBUS; /* Error */
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if (!entry->pagelist)
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return NOPAGE_SIGBUS; /* Nothing allocated */
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return VM_FAULT_SIGBUS; /* Nothing allocated */
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offset = address - vma->vm_start;
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offset = (unsigned long)vmf->virtual_address - vma->vm_start;
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map_offset = map->offset - (unsigned long)dev->sg->virtual;
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page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT);
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page = entry->pagelist[page_offset];
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get_page(page);
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vmf->page = page;
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return page;
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return 0;
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}
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static struct page *drm_vm_nopage(struct vm_area_struct *vma,
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unsigned long address, int *type)
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static int drm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
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{
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if (type)
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*type = VM_FAULT_MINOR;
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return drm_do_vm_nopage(vma, address);
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return drm_do_vm_fault(vma, vmf);
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}
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static struct page *drm_vm_shm_nopage(struct vm_area_struct *vma,
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unsigned long address, int *type)
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static int drm_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
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{
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if (type)
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*type = VM_FAULT_MINOR;
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return drm_do_vm_shm_nopage(vma, address);
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return drm_do_vm_shm_fault(vma, vmf);
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}
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static struct page *drm_vm_dma_nopage(struct vm_area_struct *vma,
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unsigned long address, int *type)
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static int drm_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
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{
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if (type)
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*type = VM_FAULT_MINOR;
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return drm_do_vm_dma_nopage(vma, address);
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return drm_do_vm_dma_fault(vma, vmf);
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}
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static struct page *drm_vm_sg_nopage(struct vm_area_struct *vma,
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unsigned long address, int *type)
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static int drm_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
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{
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if (type)
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*type = VM_FAULT_MINOR;
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return drm_do_vm_sg_nopage(vma, address);
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return drm_do_vm_sg_fault(vma, vmf);
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}
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/** AGP virtual memory operations */
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static struct vm_operations_struct drm_vm_ops = {
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.nopage = drm_vm_nopage,
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.fault = drm_vm_fault,
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.open = drm_vm_open,
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.close = drm_vm_close,
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};
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/** Shared virtual memory operations */
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static struct vm_operations_struct drm_vm_shm_ops = {
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.nopage = drm_vm_shm_nopage,
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.fault = drm_vm_shm_fault,
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.open = drm_vm_open,
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.close = drm_vm_shm_close,
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};
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/** DMA virtual memory operations */
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static struct vm_operations_struct drm_vm_dma_ops = {
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.nopage = drm_vm_dma_nopage,
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.fault = drm_vm_dma_fault,
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.open = drm_vm_open,
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.close = drm_vm_close,
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};
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/** Scatter-gather virtual memory operations */
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static struct vm_operations_struct drm_vm_sg_ops = {
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.nopage = drm_vm_sg_nopage,
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.fault = drm_vm_sg_fault,
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.open = drm_vm_open,
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.close = drm_vm_close,
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};
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@ -604,7 +589,7 @@ static int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma)
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/*
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* On some platforms we can't talk to bus dma address from the CPU, so for
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* memory of type DRM_AGP, we'll deal with sorting out the real physical
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* pages and mappings in nopage()
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* pages and mappings in fault()
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*/
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#if defined(__powerpc__)
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pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
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@ -634,7 +619,7 @@ static int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma)
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break;
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case _DRM_CONSISTENT:
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/* Consistent memory is really like shared memory. But
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* it's allocated in a different way, so avoid nopage */
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* it's allocated in a different way, so avoid fault */
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if (remap_pfn_range(vma, vma->vm_start,
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page_to_pfn(virt_to_page(map->handle)),
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vma->vm_end - vma->vm_start, vma->vm_page_prot))
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