diff options
Diffstat (limited to 'drivers/infiniband/sw/rxe/rxe_dma.c')
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe_dma.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_dma.c b/drivers/infiniband/sw/rxe/rxe_dma.c deleted file mode 100644 index a0f8af5851ae..000000000000 --- a/drivers/infiniband/sw/rxe/rxe_dma.c +++ /dev/null @@ -1,183 +0,0 @@ -/* - * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. - * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. - * - * This software is available to you under a choice of one of two - * licenses. You may choose to be licensed under the terms of the GNU - * General Public License (GPL) Version 2, available from the file - * COPYING in the main directory of this source tree, or the - * OpenIB.org BSD license below: - * - * Redistribution and use in source and binary forms, with or - * without modification, are permitted provided that the following - * conditions are met: - * - * - Redistributions of source code must retain the above - * copyright notice, this list of conditions and the following - * disclaimer. - * - * - Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following - * disclaimer in the documentation and/or other materials - * provided with the distribution. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS - * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN - * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -#include "rxe.h" -#include "rxe_loc.h" - -#define DMA_BAD_ADDER ((u64)0) - -static int rxe_mapping_error(struct ib_device *dev, u64 dma_addr) -{ - return dma_addr == DMA_BAD_ADDER; -} - -static u64 rxe_dma_map_single(struct ib_device *dev, - void *cpu_addr, size_t size, - enum dma_data_direction direction) -{ - WARN_ON(!valid_dma_direction(direction)); - return (uintptr_t)cpu_addr; -} - -static void rxe_dma_unmap_single(struct ib_device *dev, - u64 addr, size_t size, - enum dma_data_direction direction) -{ - WARN_ON(!valid_dma_direction(direction)); -} - -static u64 rxe_dma_map_page(struct ib_device *dev, - struct page *page, - unsigned long offset, - size_t size, enum dma_data_direction direction) -{ - u64 addr; - - WARN_ON(!valid_dma_direction(direction)); - - if (offset + size > PAGE_SIZE) { - addr = DMA_BAD_ADDER; - goto done; - } - - addr = (uintptr_t)page_address(page); - if (addr) - addr += offset; - -done: - return addr; -} - -static void rxe_dma_unmap_page(struct ib_device *dev, - u64 addr, size_t size, - enum dma_data_direction direction) -{ - WARN_ON(!valid_dma_direction(direction)); -} - -static int rxe_map_sg(struct ib_device *dev, struct scatterlist *sgl, - int nents, enum dma_data_direction direction) -{ - struct scatterlist *sg; - u64 addr; - int i; - int ret = nents; - - WARN_ON(!valid_dma_direction(direction)); - - for_each_sg(sgl, sg, nents, i) { - addr = (uintptr_t)page_address(sg_page(sg)); - if (!addr) { - ret = 0; - break; - } - sg->dma_address = addr + sg->offset; -#ifdef CONFIG_NEED_SG_DMA_LENGTH - sg->dma_length = sg->length; -#endif - } - - return ret; -} - -static void rxe_unmap_sg(struct ib_device *dev, - struct scatterlist *sg, int nents, - enum dma_data_direction direction) -{ - WARN_ON(!valid_dma_direction(direction)); -} - -static int rxe_map_sg_attrs(struct ib_device *dev, struct scatterlist *sgl, - int nents, enum dma_data_direction direction, - unsigned long attrs) -{ - return rxe_map_sg(dev, sgl, nents, direction); -} - -static void rxe_unmap_sg_attrs(struct ib_device *dev, - struct scatterlist *sg, int nents, - enum dma_data_direction direction, - unsigned long attrs) -{ - rxe_unmap_sg(dev, sg, nents, direction); -} - -static void rxe_sync_single_for_cpu(struct ib_device *dev, - u64 addr, - size_t size, enum dma_data_direction dir) -{ -} - -static void rxe_sync_single_for_device(struct ib_device *dev, - u64 addr, - size_t size, enum dma_data_direction dir) -{ -} - -static void *rxe_dma_alloc_coherent(struct ib_device *dev, size_t size, - u64 *dma_handle, gfp_t flag) -{ - struct page *p; - void *addr = NULL; - - p = alloc_pages(flag, get_order(size)); - if (p) - addr = page_address(p); - - if (dma_handle) - *dma_handle = (uintptr_t)addr; - - return addr; -} - -static void rxe_dma_free_coherent(struct ib_device *dev, size_t size, - void *cpu_addr, u64 dma_handle) -{ - free_pages((unsigned long)cpu_addr, get_order(size)); -} - -struct ib_dma_mapping_ops rxe_dma_mapping_ops = { - .mapping_error = rxe_mapping_error, - .map_single = rxe_dma_map_single, - .unmap_single = rxe_dma_unmap_single, - .map_page = rxe_dma_map_page, - .unmap_page = rxe_dma_unmap_page, - .map_sg = rxe_map_sg, - .unmap_sg = rxe_unmap_sg, - .map_sg_attrs = rxe_map_sg_attrs, - .unmap_sg_attrs = rxe_unmap_sg_attrs, - .sync_single_for_cpu = rxe_sync_single_for_cpu, - .sync_single_for_device = rxe_sync_single_for_device, - .alloc_coherent = rxe_dma_alloc_coherent, - .free_coherent = rxe_dma_free_coherent -}; |