mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 12:20:52 +07:00
5299709d0a
Most dma_map_ops structures are never modified. Constify these
structures such that these can be write-protected. This patch
has been generated as follows:
git grep -l 'struct dma_map_ops' |
xargs -d\\n sed -i \
-e 's/struct dma_map_ops/const struct dma_map_ops/g' \
-e 's/const struct dma_map_ops {/struct dma_map_ops {/g' \
-e 's/^const struct dma_map_ops;$/struct dma_map_ops;/' \
-e 's/const const struct dma_map_ops /const struct dma_map_ops /g';
sed -i -e 's/const \(struct dma_map_ops intel_dma_ops\)/\1/' \
$(git grep -l 'struct dma_map_ops intel_dma_ops');
sed -i -e 's/const \(struct dma_map_ops dma_iommu_ops\)/\1/' \
$(git grep -l 'struct dma_map_ops' | grep ^arch/powerpc);
sed -i -e '/^struct vmd_dev {$/,/^};$/ s/const \(struct dma_map_ops[[:blank:]]dma_ops;\)/\1/' \
-e '/^static void vmd_setup_dma_ops/,/^}$/ s/const \(struct dma_map_ops \*dest\)/\1/' \
-e 's/const \(struct dma_map_ops \*dest = \&vmd->dma_ops\)/\1/' \
drivers/pci/host/*.c
sed -i -e '/^void __init pci_iommu_alloc(void)$/,/^}$/ s/dma_ops->/intel_dma_ops./' arch/ia64/kernel/pci-dma.c
sed -i -e 's/static const struct dma_map_ops sn_dma_ops/static struct dma_map_ops sn_dma_ops/' arch/ia64/sn/pci/pci_dma.c
sed -i -e 's/(const struct dma_map_ops \*)//' drivers/misc/mic/bus/vop_bus.c
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Juergen Gross <jgross@suse.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Russell King <linux@armlinux.org.uk>
Cc: x86@kernel.org
Signed-off-by: Doug Ledford <dledford@redhat.com>
119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
/* pci-dma.c: Dynamic DMA mapping support for the FRV CPUs that have MMUs
|
|
*
|
|
* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/list.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/export.h>
|
|
#include <linux/highmem.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <asm/io.h>
|
|
|
|
static void *frv_dma_alloc(struct device *hwdev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
|
|
{
|
|
void *ret;
|
|
|
|
ret = consistent_alloc(gfp, size, dma_handle);
|
|
if (ret)
|
|
memset(ret, 0, size);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void frv_dma_free(struct device *hwdev, size_t size, void *vaddr,
|
|
dma_addr_t dma_handle, unsigned long attrs)
|
|
{
|
|
consistent_free(vaddr);
|
|
}
|
|
|
|
static int frv_dma_map_sg(struct device *dev, struct scatterlist *sglist,
|
|
int nents, enum dma_data_direction direction,
|
|
unsigned long attrs)
|
|
{
|
|
struct scatterlist *sg;
|
|
unsigned long dampr2;
|
|
void *vaddr;
|
|
int i;
|
|
|
|
BUG_ON(direction == DMA_NONE);
|
|
|
|
if (attrs & DMA_ATTR_SKIP_CPU_SYNC)
|
|
return nents;
|
|
|
|
dampr2 = __get_DAMPR(2);
|
|
|
|
for_each_sg(sglist, sg, nents, i) {
|
|
vaddr = kmap_atomic_primary(sg_page(sg));
|
|
|
|
frv_dcache_writeback((unsigned long) vaddr,
|
|
(unsigned long) vaddr + PAGE_SIZE);
|
|
|
|
}
|
|
|
|
kunmap_atomic_primary(vaddr);
|
|
if (dampr2) {
|
|
__set_DAMPR(2, dampr2);
|
|
__set_IAMPR(2, dampr2);
|
|
}
|
|
|
|
return nents;
|
|
}
|
|
|
|
static dma_addr_t frv_dma_map_page(struct device *dev, struct page *page,
|
|
unsigned long offset, size_t size,
|
|
enum dma_data_direction direction, unsigned long attrs)
|
|
{
|
|
if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
|
|
flush_dcache_page(page);
|
|
|
|
return (dma_addr_t) page_to_phys(page) + offset;
|
|
}
|
|
|
|
static void frv_dma_sync_single_for_device(struct device *dev,
|
|
dma_addr_t dma_handle, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
flush_write_buffers();
|
|
}
|
|
|
|
static void frv_dma_sync_sg_for_device(struct device *dev,
|
|
struct scatterlist *sg, int nelems,
|
|
enum dma_data_direction direction)
|
|
{
|
|
flush_write_buffers();
|
|
}
|
|
|
|
|
|
static int frv_dma_supported(struct device *dev, u64 mask)
|
|
{
|
|
/*
|
|
* we fall back to GFP_DMA when the mask isn't all 1s,
|
|
* so we can't guarantee allocations that must be
|
|
* within a tighter range than GFP_DMA..
|
|
*/
|
|
if (mask < 0x00ffffff)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
const struct dma_map_ops frv_dma_ops = {
|
|
.alloc = frv_dma_alloc,
|
|
.free = frv_dma_free,
|
|
.map_page = frv_dma_map_page,
|
|
.map_sg = frv_dma_map_sg,
|
|
.sync_single_for_device = frv_dma_sync_single_for_device,
|
|
.sync_sg_for_device = frv_dma_sync_sg_for_device,
|
|
.dma_supported = frv_dma_supported,
|
|
};
|
|
EXPORT_SYMBOL(frv_dma_ops);
|