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Commit 52aee3e8 authored by Christoph Hellwig's avatar Christoph Hellwig
Browse files

ia64/sba_iommu: improve internal map_page users 



Remove the odd sba_{un,}map_single_attrs wrappers, check errors
everywhere.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Acked-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent a20388be

arch/ia64/hp/common/sba_iommu.c

+29 −44
Original line number Diff line number Diff line
@@ -907,11 +907,12 @@ sba_mark_invalid(struct ioc *ioc, dma_addr_t iova, size_t byte_cnt) 
}



/**

 * sba_map_single_attrs - map one buffer and return IOVA for DMA

 * sba_map_page - map one buffer and return IOVA for DMA

 * @dev: instance of PCI owned by the driver that's asking.

 * @addr:  driver buffer to map.

 * @size:  number of bytes to map in driver buffer.

 * @dir:  R/W or both.

 * @page: page to map

 * @poff: offset into page

 * @size: number of bytes to map

 * @dir: dma direction

 * @attrs: optional dma attributes

 *

 * See Documentation/DMA-API-HOWTO.txt
@@ -944,7 +945,7 @@ static dma_addr_t sba_map_page(struct device *dev, struct page *page, 
 		** Device is bit capable of DMA'ing to the buffer...

		** just return the PCI address of ptr

 		*/

		DBG_BYPASS("sba_map_single_attrs() bypass mask/addr: "

		DBG_BYPASS("sba_map_page() bypass mask/addr: "

			   "0x%lx/0x%lx\n",

		           to_pci_dev(dev)->dma_mask, pci_addr);

		return pci_addr;
@@ -966,7 +967,7 @@ static dma_addr_t sba_map_page(struct device *dev, struct page *page, 


#ifdef ASSERT_PDIR_SANITY

	spin_lock_irqsave(&ioc->res_lock, flags);

	if (sba_check_pdir(ioc,"Check before sba_map_single_attrs()"))

	if (sba_check_pdir(ioc,"Check before sba_map_page()"))

		panic("Sanity check failed");

	spin_unlock_irqrestore(&ioc->res_lock, flags);

#endif
@@ -997,20 +998,12 @@ static dma_addr_t sba_map_page(struct device *dev, struct page *page, 
	/* form complete address */

#ifdef ASSERT_PDIR_SANITY

	spin_lock_irqsave(&ioc->res_lock, flags);

	sba_check_pdir(ioc,"Check after sba_map_single_attrs()");

	sba_check_pdir(ioc,"Check after sba_map_page()");

	spin_unlock_irqrestore(&ioc->res_lock, flags);

#endif

	return SBA_IOVA(ioc, iovp, offset);

}



static dma_addr_t sba_map_single_attrs(struct device *dev, void *addr,

				       size_t size, enum dma_data_direction dir,

				       unsigned long attrs)

{

	return sba_map_page(dev, virt_to_page(addr),

			    (unsigned long)addr & ~PAGE_MASK, size, dir, attrs);

}



#ifdef ENABLE_MARK_CLEAN

static SBA_INLINE void

sba_mark_clean(struct ioc *ioc, dma_addr_t iova, size_t size)
@@ -1036,7 +1029,7 @@ sba_mark_clean(struct ioc *ioc, dma_addr_t iova, size_t size) 
#endif



/**

 * sba_unmap_single_attrs - unmap one IOVA and free resources

 * sba_unmap_page - unmap one IOVA and free resources

 * @dev: instance of PCI owned by the driver that's asking.

 * @iova:  IOVA of driver buffer previously mapped.

 * @size:  number of bytes mapped in driver buffer.
@@ -1063,7 +1056,7 @@ static void sba_unmap_page(struct device *dev, dma_addr_t iova, size_t size, 
		/*

		** Address does not fall w/in IOVA, must be bypassing

		*/

		DBG_BYPASS("sba_unmap_single_attrs() bypass addr: 0x%lx\n",

		DBG_BYPASS("sba_unmap_page() bypass addr: 0x%lx\n",

			   iova);



#ifdef ENABLE_MARK_CLEAN
@@ -1114,12 +1107,6 @@ static void sba_unmap_page(struct device *dev, dma_addr_t iova, size_t size, 
#endif /* DELAYED_RESOURCE_CNT == 0 */

}



void sba_unmap_single_attrs(struct device *dev, dma_addr_t iova, size_t size,

			    enum dma_data_direction dir, unsigned long attrs)

{

	sba_unmap_page(dev, iova, size, dir, attrs);

}



/**

 * sba_alloc_coherent - allocate/map shared mem for DMA

 * @dev: instance of PCI owned by the driver that's asking.
@@ -1132,30 +1119,24 @@ static void * 
sba_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,

		   gfp_t flags, unsigned long attrs)

{

	struct page *page;

	struct ioc *ioc;

	int node = -1;

	void *addr;



	ioc = GET_IOC(dev);

	ASSERT(ioc);



#ifdef CONFIG_NUMA

	{

		struct page *page;

	node = ioc->node;

#endif



		page = alloc_pages_node(ioc->node, flags, get_order(size));

	page = alloc_pages_node(node, flags, get_order(size));

	if (unlikely(!page))

		return NULL;



	addr = page_address(page);

	}

#else

	addr = (void *) __get_free_pages(flags, get_order(size));

#endif

	if (unlikely(!addr))

		return NULL;



	memset(addr, 0, size);

	*dma_handle = virt_to_phys(addr);

	*dma_handle = page_to_phys(page);



#ifdef ALLOW_IOV_BYPASS

	ASSERT(dev->coherent_dma_mask);
@@ -1174,9 +1155,10 @@ sba_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, 
	 * If device can't bypass or bypass is disabled, pass the 32bit fake

	 * device to map single to get an iova mapping.

	 */

	*dma_handle = sba_map_single_attrs(&ioc->sac_only_dev->dev, addr,

					   size, 0, 0);



	*dma_handle = sba_map_page(&ioc->sac_only_dev->dev, page, 0, size,

			DMA_BIDIRECTIONAL, 0);

	if (dma_mapping_error(dev, *dma_handle))

		return NULL;

	return addr;

}
@@ -1193,7 +1175,7 @@ sba_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, 
static void sba_free_coherent(struct device *dev, size_t size, void *vaddr,

			      dma_addr_t dma_handle, unsigned long attrs)

{

	sba_unmap_single_attrs(dev, dma_handle, size, 0, 0);

	sba_unmap_page(dev, dma_handle, size, 0, 0);

	free_pages((unsigned long) vaddr, get_order(size));

}
@@ -1483,7 +1465,10 @@ static int sba_map_sg_attrs(struct device *dev, struct scatterlist *sglist, 
	/* Fast path single entry scatterlists. */

	if (nents == 1) {

		sglist->dma_length = sglist->length;

		sglist->dma_address = sba_map_single_attrs(dev, sba_sg_address(sglist), sglist->length, dir, attrs);

		sglist->dma_address = sba_map_page(dev, sg_page(sglist),

				sglist->offset, sglist->length, dir, attrs);

		if (dma_mapping_error(dev, sglist->dma_address))

			return 0;

		return 1;

	}
@@ -1572,8 +1557,8 @@ static void sba_unmap_sg_attrs(struct device *dev, struct scatterlist *sglist, 


	while (nents && sglist->dma_length) {



		sba_unmap_single_attrs(dev, sglist->dma_address,

				       sglist->dma_length, dir, attrs);

		sba_unmap_page(dev, sglist->dma_address, sglist->dma_length,

			       dir, attrs);

		sglist = sg_next(sglist);

		nents--;

	}