IB/qib: Remove DMA mapping code

The qib DMA mapping code is no longer built since commit eb636ac0e49e
("IB/qib: Remove dma.c and use rdmavt version of dma functions"). Hence
remove it.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Mike Marciniszyn <mike.marciniszyn@intel.com>
Cc: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

2 files changed, 1 insertions, 173 deletions

diff --git a/drivers/infiniband/hw/qib/qib_dma.c b/drivers/infiniband/hw/qib/qib_dma.c
deleted file mode 100644
index 59fe092b4b0f..000000000000
--- a/drivers/infiniband/hw/qib/qib_dma.c
+++ /dev/null
@@ -1,169 +0,0 @@
-/*
- * Copyright (c) 2006, 2009, 2010 QLogic, Corporation. 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 <linux/types.h>
-#include <linux/scatterlist.h>
-
-#include "qib_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 qib_mapping_error(struct ib_device *dev, u64 dma_addr)
-{
-        return dma_addr == BAD_DMA_ADDRESS;
-}
-
-static u64 qib_dma_map_single(struct ib_device *dev, void *cpu_addr,
-                              size_t size, enum dma_data_direction direction)
-{
-        BUG_ON(!valid_dma_direction(direction));
-        return (u64) cpu_addr;
-}
-
-static void qib_dma_unmap_single(struct ib_device *dev, u64 addr, size_t size,
-                                 enum dma_data_direction direction)
-{
-        BUG_ON(!valid_dma_direction(direction));
-}
-
-static u64 qib_dma_map_page(struct ib_device *dev, struct page *page,
-                            unsigned long offset, size_t size,
-                            enum dma_data_direction direction)
-{
-        u64 addr;
-
-        BUG_ON(!valid_dma_direction(direction));
-
-        if (offset + size > PAGE_SIZE) {
-                addr = BAD_DMA_ADDRESS;
-                goto done;
-        }
-
-        addr = (u64) page_address(page);
-        if (addr)
-                addr += offset;
-        /* TODO: handle highmem pages */
-
-done:
-        return addr;
-}
-
-static void qib_dma_unmap_page(struct ib_device *dev, u64 addr, size_t size,
-                               enum dma_data_direction direction)
-{
-        BUG_ON(!valid_dma_direction(direction));
-}
-
-static int qib_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;
-
-        BUG_ON(!valid_dma_direction(direction));
-
-        for_each_sg(sgl, sg, nents, i) {
-                addr = (u64) page_address(sg_page(sg));
-                /* TODO: handle highmem pages */
-                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 qib_unmap_sg(struct ib_device *dev,
-                         struct scatterlist *sg, int nents,
-                         enum dma_data_direction direction)
-{
-        BUG_ON(!valid_dma_direction(direction));
-}
-
-static void qib_sync_single_for_cpu(struct ib_device *dev, u64 addr,
-                                    size_t size, enum dma_data_direction dir)
-{
-}
-
-static void qib_sync_single_for_device(struct ib_device *dev, u64 addr,
-                                       size_t size,
-                                       enum dma_data_direction dir)
-{
-}
-
-static void *qib_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 qib_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 qib_dma_mapping_ops = {
-        .mapping_error = qib_mapping_error,
-        .map_single = qib_dma_map_single,
-        .unmap_single = qib_dma_unmap_single,
-        .map_page = qib_dma_map_page,
-        .unmap_page = qib_dma_unmap_page,
-        .map_sg = qib_map_sg,
-        .unmap_sg = qib_unmap_sg,
-        .sync_single_for_cpu = qib_sync_single_for_cpu,
-        .sync_single_for_device = qib_sync_single_for_device,
-        .alloc_coherent = qib_dma_alloc_coherent,
-        .free_coherent = qib_dma_free_coherent
-};
diff --git a/drivers/infiniband/hw/qib/qib_keys.c b/drivers/infiniband/hw/qib/qib_keys.c
index 2c3c93572c17..8fdf79f8d4e4 100644
--- a/drivers/infiniband/hw/qib/qib_keys.c
+++ b/drivers/infiniband/hw/qib/qib_keys.c
@@ -158,10 +158,7 @@ int qib_rkey_ok(struct rvt_qp *qp, struct rvt_sge *sge,
         unsigned n, m;
         size_t off;
 
-        /*
-         * We use RKEY == zero for kernel virtual addresses
-         * (see qib_get_dma_mr and qib_dma.c).
-         */
+        /* We use RKEY == zero for kernel virtual addresses */
         rcu_read_lock();
         if (rkey == 0) {
                 struct rvt_pd *pd = ibpd_to_rvtpd(qp->ibqp.pd);