mirror of
https://github.com/torvalds/linux.git
synced 2024-12-14 07:02:23 +00:00
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>
142 lines
2.8 KiB
C
142 lines
2.8 KiB
C
/*
|
|
* linux/arch/alpha/kernel/pci-noop.c
|
|
*
|
|
* Stub PCI interfaces for Jensen-specific kernels.
|
|
*/
|
|
|
|
#include <linux/pci.h>
|
|
#include <linux/init.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/gfp.h>
|
|
#include <linux/capability.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/scatterlist.h>
|
|
|
|
#include "proto.h"
|
|
|
|
|
|
/*
|
|
* The PCI controller list.
|
|
*/
|
|
|
|
struct pci_controller *hose_head, **hose_tail = &hose_head;
|
|
struct pci_controller *pci_isa_hose;
|
|
|
|
|
|
struct pci_controller * __init
|
|
alloc_pci_controller(void)
|
|
{
|
|
struct pci_controller *hose;
|
|
|
|
hose = alloc_bootmem(sizeof(*hose));
|
|
|
|
*hose_tail = hose;
|
|
hose_tail = &hose->next;
|
|
|
|
return hose;
|
|
}
|
|
|
|
struct resource * __init
|
|
alloc_resource(void)
|
|
{
|
|
struct resource *res;
|
|
|
|
res = alloc_bootmem(sizeof(*res));
|
|
|
|
return res;
|
|
}
|
|
|
|
asmlinkage long
|
|
sys_pciconfig_iobase(long which, unsigned long bus, unsigned long dfn)
|
|
{
|
|
struct pci_controller *hose;
|
|
|
|
/* from hose or from bus.devfn */
|
|
if (which & IOBASE_FROM_HOSE) {
|
|
for (hose = hose_head; hose; hose = hose->next)
|
|
if (hose->index == bus)
|
|
break;
|
|
if (!hose)
|
|
return -ENODEV;
|
|
} else {
|
|
/* Special hook for ISA access. */
|
|
if (bus == 0 && dfn == 0)
|
|
hose = pci_isa_hose;
|
|
else
|
|
return -ENODEV;
|
|
}
|
|
|
|
switch (which & ~IOBASE_FROM_HOSE) {
|
|
case IOBASE_HOSE:
|
|
return hose->index;
|
|
case IOBASE_SPARSE_MEM:
|
|
return hose->sparse_mem_base;
|
|
case IOBASE_DENSE_MEM:
|
|
return hose->dense_mem_base;
|
|
case IOBASE_SPARSE_IO:
|
|
return hose->sparse_io_base;
|
|
case IOBASE_DENSE_IO:
|
|
return hose->dense_io_base;
|
|
case IOBASE_ROOT_BUS:
|
|
return hose->bus->number;
|
|
}
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
asmlinkage long
|
|
sys_pciconfig_read(unsigned long bus, unsigned long dfn,
|
|
unsigned long off, unsigned long len, void *buf)
|
|
{
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
else
|
|
return -ENODEV;
|
|
}
|
|
|
|
asmlinkage long
|
|
sys_pciconfig_write(unsigned long bus, unsigned long dfn,
|
|
unsigned long off, unsigned long len, void *buf)
|
|
{
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
else
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void *alpha_noop_alloc_coherent(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t gfp,
|
|
unsigned long attrs)
|
|
{
|
|
void *ret;
|
|
|
|
if (!dev || *dev->dma_mask >= 0xffffffffUL)
|
|
gfp &= ~GFP_DMA;
|
|
ret = (void *)__get_free_pages(gfp, get_order(size));
|
|
if (ret) {
|
|
memset(ret, 0, size);
|
|
*dma_handle = virt_to_phys(ret);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int alpha_noop_supported(struct device *dev, u64 mask)
|
|
{
|
|
return mask < 0x00ffffffUL ? 0 : 1;
|
|
}
|
|
|
|
const struct dma_map_ops alpha_noop_ops = {
|
|
.alloc = alpha_noop_alloc_coherent,
|
|
.free = dma_noop_free_coherent,
|
|
.map_page = dma_noop_map_page,
|
|
.map_sg = dma_noop_map_sg,
|
|
.mapping_error = dma_noop_mapping_error,
|
|
.dma_supported = alpha_noop_supported,
|
|
};
|
|
|
|
const struct dma_map_ops *dma_ops = &alpha_noop_ops;
|
|
EXPORT_SYMBOL(dma_ops);
|