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