Merge tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

Pull rdma DMA mapping updates from Doug Ledford:
 "Drop IB DMA mapping code and use core DMA code instead.

  Bart Van Assche noted that the ib DMA mapping code was significantly
  similar enough to the core DMA mapping code that with a few changes it
  was possible to remove the IB DMA mapping code entirely and switch the
  RDMA stack to use the core DMA mapping code.

  This resulted in a nice set of cleanups, but touched the entire tree
  and has been kept separate for that reason."

* tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (37 commits)
  IB/rxe, IB/rdmavt: Use dma_virt_ops instead of duplicating it
  IB/core: Remove ib_device.dma_device
  nvme-rdma: Switch from dma_device to dev.parent
  RDS: net: Switch from dma_device to dev.parent
  IB/srpt: Modify a debug statement
  IB/srp: Switch from dma_device to dev.parent
  IB/iser: Switch from dma_device to dev.parent
  IB/IPoIB: Switch from dma_device to dev.parent
  IB/rxe: Switch from dma_device to dev.parent
  IB/vmw_pvrdma: Switch from dma_device to dev.parent
  IB/usnic: Switch from dma_device to dev.parent
  IB/qib: Switch from dma_device to dev.parent
  IB/qedr: Switch from dma_device to dev.parent
  IB/ocrdma: Switch from dma_device to dev.parent
  IB/nes: Remove a superfluous assignment statement
  IB/mthca: Switch from dma_device to dev.parent
  IB/mlx5: Switch from dma_device to dev.parent
  IB/mlx4: Switch from dma_device to dev.parent
  IB/i40iw: Remove a superfluous assignment statement
  IB/hns: Switch from dma_device to dev.parent
  ...

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
-};