You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
97 lines
3.4 KiB
97 lines
3.4 KiB
/*
|
|
* Copyright (C) 2003-2013 Broadcom 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 Broadcom
|
|
* license below:
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY BROADCOM ``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 BROADCOM 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/dma-mapping.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/export.h>
|
|
#include <linux/swiotlb.h>
|
|
#include <linux/types.h>
|
|
#include <linux/init.h>
|
|
#include <linux/mm.h>
|
|
|
|
#include <asm/bootinfo.h>
|
|
|
|
static char *nlm_swiotlb;
|
|
|
|
static void *nlm_dma_alloc_coherent(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
|
|
{
|
|
/* ignore region specifiers */
|
|
gfp &= ~(__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM);
|
|
|
|
#ifdef CONFIG_ZONE_DMA32
|
|
if (dev->coherent_dma_mask <= DMA_BIT_MASK(32))
|
|
gfp |= __GFP_DMA32;
|
|
#endif
|
|
|
|
/* Don't invoke OOM killer */
|
|
gfp |= __GFP_NORETRY;
|
|
|
|
return swiotlb_alloc_coherent(dev, size, dma_handle, gfp);
|
|
}
|
|
|
|
static void nlm_dma_free_coherent(struct device *dev, size_t size,
|
|
void *vaddr, dma_addr_t dma_handle, unsigned long attrs)
|
|
{
|
|
swiotlb_free_coherent(dev, size, vaddr, dma_handle);
|
|
}
|
|
|
|
struct dma_map_ops nlm_swiotlb_dma_ops = {
|
|
.alloc = nlm_dma_alloc_coherent,
|
|
.free = nlm_dma_free_coherent,
|
|
.map_page = swiotlb_map_page,
|
|
.unmap_page = swiotlb_unmap_page,
|
|
.map_sg = swiotlb_map_sg_attrs,
|
|
.unmap_sg = swiotlb_unmap_sg_attrs,
|
|
.sync_single_for_cpu = swiotlb_sync_single_for_cpu,
|
|
.sync_single_for_device = swiotlb_sync_single_for_device,
|
|
.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
|
|
.sync_sg_for_device = swiotlb_sync_sg_for_device,
|
|
.mapping_error = swiotlb_dma_mapping_error,
|
|
.dma_supported = swiotlb_dma_supported
|
|
};
|
|
|
|
void __init plat_swiotlb_setup(void)
|
|
{
|
|
size_t swiotlbsize;
|
|
unsigned long swiotlb_nslabs;
|
|
|
|
swiotlbsize = 1 << 20; /* 1 MB for now */
|
|
swiotlb_nslabs = swiotlbsize >> IO_TLB_SHIFT;
|
|
swiotlb_nslabs = ALIGN(swiotlb_nslabs, IO_TLB_SEGSIZE);
|
|
swiotlbsize = swiotlb_nslabs << IO_TLB_SHIFT;
|
|
|
|
nlm_swiotlb = alloc_bootmem_low_pages(swiotlbsize);
|
|
swiotlb_init_with_tbl(nlm_swiotlb, swiotlb_nslabs, 1);
|
|
}
|
|
|