mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-20 14:16:02 +00:00
![Al Viro](/assets/img/avatar_default.png)
taken exports to actual definitions of symbols being exported. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
216 lines
3.9 KiB
C
216 lines
3.9 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/capability.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/dma-mapping.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;
|
|
}
|
|
|
|
/* Stubs for the routines in pci_iommu.c: */
|
|
|
|
void *
|
|
pci_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
void
|
|
pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu_addr,
|
|
dma_addr_t dma_addr)
|
|
{
|
|
}
|
|
|
|
dma_addr_t
|
|
pci_map_single(struct pci_dev *pdev, void *cpu_addr, size_t size,
|
|
int direction)
|
|
{
|
|
return (dma_addr_t) 0;
|
|
}
|
|
|
|
void
|
|
pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size,
|
|
int direction)
|
|
{
|
|
}
|
|
|
|
int
|
|
pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
|
|
int direction)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
|
|
int direction)
|
|
{
|
|
}
|
|
|
|
int
|
|
pci_dma_supported(struct pci_dev *hwdev, dma_addr_t mask)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* Generic DMA mapping functions: */
|
|
|
|
void *
|
|
dma_alloc_coherent(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t gfp)
|
|
{
|
|
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_bus(ret);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
EXPORT_SYMBOL(dma_alloc_coherent);
|
|
|
|
int
|
|
dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
|
|
enum dma_data_direction direction)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < nents; i++ ) {
|
|
void *va;
|
|
|
|
BUG_ON(!sg[i].page);
|
|
va = page_address(sg[i].page) + sg[i].offset;
|
|
sg_dma_address(sg + i) = (dma_addr_t)virt_to_bus(va);
|
|
sg_dma_len(sg + i) = sg[i].length;
|
|
}
|
|
|
|
return nents;
|
|
}
|
|
|
|
EXPORT_SYMBOL(dma_map_sg);
|
|
|
|
int
|
|
dma_set_mask(struct device *dev, u64 mask)
|
|
{
|
|
if (!dev->dma_mask || !dma_supported(dev, mask))
|
|
return -EIO;
|
|
|
|
*dev->dma_mask = mask;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(dma_set_mask);
|
|
|
|
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
|
|
{
|
|
}
|
|
|
|
EXPORT_SYMBOL(pci_iomap);
|
|
EXPORT_SYMBOL(pci_iounmap);
|