Merge tag 'dma-mapping-5.3' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping updates from Christoph Hellwig:

 - move the USB special case that bounced DMA through a device bar into
   the USB code instead of handling it in the common DMA code (Laurentiu
   Tudor and Fredrik Noring)

 - don't dip into the global CMA pool for single page allocations
   (Nicolin Chen)

 - fix a crash when allocating memory for the atomic pool failed during
   boot (Florian Fainelli)

 - move support for MIPS-style uncached segments to the common code and
   use that for MIPS and nios2 (me)

 - make support for DMA_ATTR_NON_CONSISTENT and
   DMA_ATTR_NO_KERNEL_MAPPING generic (me)

 - convert nds32 to the generic remapping allocator (me)

* tag 'dma-mapping-5.3' of git://git.infradead.org/users/hch/dma-mapping: (29 commits)
  dma-mapping: mark dma_alloc_need_uncached as __always_inline
  MIPS: only select ARCH_HAS_UNCACHED_SEGMENT for non-coherent platforms
  usb: host: Fix excessive alignment restriction for local memory allocations
  lib/genalloc.c: Add algorithm, align and zeroed family of DMA allocators
  nios2: use the generic uncached segment support in dma-direct
  nds32: use the generic remapping allocator for coherent DMA allocations
  arc: use the generic remapping allocator for coherent DMA allocations
  dma-direct: handle DMA_ATTR_NO_KERNEL_MAPPING in common code
  dma-direct: handle DMA_ATTR_NON_CONSISTENT in common code
  dma-mapping: add a dma_alloc_need_uncached helper
  openrisc: remove the partial DMA_ATTR_NON_CONSISTENT support
  arc: remove the partial DMA_ATTR_NON_CONSISTENT support
  arm-nommu: remove the partial DMA_ATTR_NON_CONSISTENT support
  ARM: dma-mapping: allow larger DMA mask than supported
  dma-mapping: truncate dma masks to what dma_addr_t can hold
  iommu/dma: Apply dma_{alloc,free}_contiguous functions
  dma-remap: Avoid de-referencing NULL atomic_pool
  MIPS: use the generic uncached segment support in dma-direct
  dma-direct: provide generic support for uncached kernel segments
  au1100fb: fix DMA API abuse
  ...

2 files changed, 5 insertions, 20 deletions

diff --git a/drivers/video/fbdev/au1100fb.c b/drivers/video/fbdev/au1100fb.c
index 0adf0683cf08..99941ae1f3a1 100644
--- a/drivers/video/fbdev/au1100fb.c
+++ b/drivers/video/fbdev/au1100fb.c
@@ -340,14 +340,12 @@ int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
  */
 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
 {
-	struct au1100fb_device *fbdev;
-
-	fbdev = to_au1100fb_device(fbi);
+	struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 
-	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 	pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
 
-	return vm_iomap_memory(vma, fbdev->fb_phys, fbdev->fb_len);
+	return dma_mmap_coherent(fbdev->dev, vma, fbdev->fb_mem, fbdev->fb_phys,
+			fbdev->fb_len);
 }
 
 static struct fb_ops au1100fb_ops =
@@ -412,7 +410,6 @@ static int au1100fb_drv_probe(struct platform_device *dev)
 {
 	struct au1100fb_device *fbdev;
 	struct resource *regs_res;
-	unsigned long page;
 	struct clk *c;
 
 	/* Allocate new device private */
@@ -424,6 +421,7 @@ static int au1100fb_drv_probe(struct platform_device *dev)
 		goto failed;
 
 	platform_set_drvdata(dev, (void *)fbdev);
+	fbdev->dev = &dev->dev;
 
 	/* Allocate region for our registers and map them */
 	regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
@@ -472,20 +470,6 @@ static int au1100fb_drv_probe(struct platform_device *dev)
 	au1100fb_fix.smem_start = fbdev->fb_phys;
 	au1100fb_fix.smem_len = fbdev->fb_len;
 
-	/*
-	 * Set page reserved so that mmap will work. This is necessary
-	 * since we'll be remapping normal memory.
-	 */
-	for (page = (unsigned long)fbdev->fb_mem;
-	     page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
-	     page += PAGE_SIZE) {
-#ifdef CONFIG_DMA_NONCOHERENT
-		SetPageReserved(virt_to_page(CAC_ADDR((void *)page)));
-#else
-		SetPageReserved(virt_to_page(page));
-#endif
-	}
-
 	print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
 	print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
 
diff --git a/drivers/video/fbdev/au1100fb.h b/drivers/video/fbdev/au1100fb.h
index 9af19939a9c6..e7239bceefd3 100644
--- a/drivers/video/fbdev/au1100fb.h
+++ b/drivers/video/fbdev/au1100fb.h
@@ -110,6 +110,7 @@ struct au1100fb_device {
 	dma_addr_t    		fb_phys;
 	int			panel_idx;
 	struct clk		*lcdclk;
+	struct device		*dev;
 };
 
 /********************************************************************/