diff options
Diffstat (limited to 'arch/cris/arch-v32/drivers/pci/dma.c')
-rw-r--r-- | arch/cris/arch-v32/drivers/pci/dma.c | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/arch/cris/arch-v32/drivers/pci/dma.c b/arch/cris/arch-v32/drivers/pci/dma.c deleted file mode 100644 index dbbd3816cc0b..000000000000 --- a/arch/cris/arch-v32/drivers/pci/dma.c +++ /dev/null @@ -1,80 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Dynamic DMA mapping support. - * - * On cris there is no hardware dynamic DMA address translation, - * so consistent alloc/free are merely page allocation/freeing. - * The rest of the dynamic DMA mapping interface is implemented - * in asm/pci.h. - * - * Borrowed from i386. - */ - -#include <linux/types.h> -#include <linux/mm.h> -#include <linux/string.h> -#include <linux/pci.h> -#include <linux/gfp.h> -#include <asm/io.h> - -static void *v32_dma_alloc(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) -{ - void *ret; - - /* ignore region specifiers */ - gfp &= ~(__GFP_DMA | __GFP_HIGHMEM); - - if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff)) - gfp |= GFP_DMA; - - ret = (void *)__get_free_pages(gfp, get_order(size)); - - if (ret != NULL) { - memset(ret, 0, size); - *dma_handle = virt_to_phys(ret); - } - return ret; -} - -static void v32_dma_free(struct device *dev, size_t size, void *vaddr, - dma_addr_t dma_handle, unsigned long attrs) -{ - free_pages((unsigned long)vaddr, get_order(size)); -} - -static inline dma_addr_t v32_dma_map_page(struct device *dev, - struct page *page, unsigned long offset, size_t size, - enum dma_data_direction direction, unsigned long attrs) -{ - return page_to_phys(page) + offset; -} - -static inline int v32_dma_map_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction direction, - unsigned long attrs) -{ - printk("Map sg\n"); - return nents; -} - -static inline int v32_dma_supported(struct device *dev, u64 mask) -{ - /* - * we fall back to GFP_DMA when the mask isn't all 1s, - * so we can't guarantee allocations that must be - * within a tighter range than GFP_DMA.. - */ - if (mask < 0x00ffffff) - return 0; - return 1; -} - -const struct dma_map_ops v32_dma_ops = { - .alloc = v32_dma_alloc, - .free = v32_dma_free, - .map_page = v32_dma_map_page, - .map_sg = v32_dma_map_sg, - .dma_supported = v32_dma_supported, -}; -EXPORT_SYMBOL(v32_dma_ops); |