IB/hf1: Remove DMA mapping code

The hfi1 DMA mapping code has never been built in any upstream kernel.
Hence remove it.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Dennis Dalessandro <dennis.dalessandro@intel.com>
Cc: Dean Luick <dean.luick@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/hfi1/dma.c b/drivers/infiniband/hw/hfi1/dma.c
deleted file mode 100644 (file)
index 7e8dab8..0000000
--- a/drivers/infiniband/hw/hfi1/dma.c
+++ /dev/null
@@ -1,183 +0,0 @@
-/*
- * Copyright(c) 2015, 2016 Intel Corporation.
- *
- * This file is provided under a dual BSD/GPLv2 license.  When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * BSD LICENSE
- *
- * 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.
- *  - Neither the name of Intel Corporation nor the names of its
- *    contributors may be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-#include <linux/types.h>
-#include <linux/scatterlist.h>
-
-#include "verbs.h"
-
-#define BAD_DMA_ADDRESS ((u64)0)
-
-/*
- * The following functions implement driver specific replacements
- * for the ib_dma_*() functions.
- *
- * These functions return kernel virtual addresses instead of
- * device bus addresses since the driver uses the CPU to copy
- * data instead of using hardware DMA.
- */
-
-static int hfi1_mapping_error(struct ib_device *dev, u64 dma_addr)
-{
-       return dma_addr == BAD_DMA_ADDRESS;
-}
-
-static u64 hfi1_dma_map_single(struct ib_device *dev, void *cpu_addr,
-                              size_t size, enum dma_data_direction direction)
-{
-       if (WARN_ON(!valid_dma_direction(direction)))
-               return BAD_DMA_ADDRESS;
-
-       return (u64)cpu_addr;
-}
-
-static void hfi1_dma_unmap_single(struct ib_device *dev, u64 addr, size_t size,
-                                 enum dma_data_direction direction)
-{
-       /* This is a stub, nothing to be done here */
-}
-
-static u64 hfi1_dma_map_page(struct ib_device *dev, struct page *page,
-                            unsigned long offset, size_t size,
-                           enum dma_data_direction direction)
-{
-       u64 addr;
-
-       if (WARN_ON(!valid_dma_direction(direction)))
-               return BAD_DMA_ADDRESS;
-
-       if (offset + size > PAGE_SIZE)
-               return BAD_DMA_ADDRESS;
-
-       addr = (u64)page_address(page);
-       if (addr)
-               addr += offset;
-
-       return addr;
-}
-
-static void hfi1_dma_unmap_page(struct ib_device *dev, u64 addr, size_t size,
-                               enum dma_data_direction direction)
-{
-       /* This is a stub, nothing to be done here */
-}
-
-static int hfi1_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;
-
-       if (WARN_ON(!valid_dma_direction(direction)))
-               return BAD_DMA_ADDRESS;
-
-       for_each_sg(sgl, sg, nents, i) {
-               addr = (u64)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 hfi1_unmap_sg(struct ib_device *dev,
-                         struct scatterlist *sg, int nents,
-                        enum dma_data_direction direction)
-{
-       /* This is a stub, nothing to be done here */
-}
-
-static void hfi1_sync_single_for_cpu(struct ib_device *dev, u64 addr,
-                                    size_t size, enum dma_data_direction dir)
-{
-}
-
-static void hfi1_sync_single_for_device(struct ib_device *dev, u64 addr,
-                                       size_t size,
-                                       enum dma_data_direction dir)
-{
-}
-
-static void *hfi1_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 = (u64)addr;
-       return addr;
-}
-
-static void hfi1_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 hfi1_dma_mapping_ops = {
-       .mapping_error = hfi1_mapping_error,
-       .map_single = hfi1_dma_map_single,
-       .unmap_single = hfi1_dma_unmap_single,
-       .map_page = hfi1_dma_map_page,
-       .unmap_page = hfi1_dma_unmap_page,
-       .map_sg = hfi1_map_sg,
-       .unmap_sg = hfi1_unmap_sg,
-       .sync_single_for_cpu = hfi1_sync_single_for_cpu,
-       .sync_single_for_device = hfi1_sync_single_for_device,
-       .alloc_coherent = hfi1_dma_alloc_coherent,
-       .free_coherent = hfi1_dma_free_coherent
-};