linux/arch/x86/include/asm/pci_64.h
Joerg Roedel 67796bf7dc x86/dma: unify definition of pci_unmap_addr* and pci_unmap_len macros
Impact: unification of pci-dma macros and pci_32.h removal

This patch unifies the definition of the pci_unmap_addr*, pci_unmap_len*
and DECLARE_PCI_UNMAP* macros. This makes sense because the pci_unmap
functions are no longer no-ops anymore when the kernel runs with
CONFIG_DMA_API_DEBUG. Without an iommu or DMA_API_DEBUG it is a no-op on 32 bit
because the dma mapping path returns a physical address and therefore the
dma-api implementation has no internal state which needs to be destroyed with
an unmap call.
This unification also simplifies the port of x86_64 iommu drivers to 32 bit x86
and let us get rid of pci_32.h.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
2009-04-03 13:13:45 +02:00

29 lines
687 B
C

#ifndef _ASM_X86_PCI_64_H
#define _ASM_X86_PCI_64_H
#ifdef __KERNEL__
#ifdef CONFIG_CALGARY_IOMMU
static inline void *pci_iommu(struct pci_bus *bus)
{
struct pci_sysdata *sd = bus->sysdata;
return sd->iommu;
}
static inline void set_pci_iommu(struct pci_bus *bus, void *val)
{
struct pci_sysdata *sd = bus->sysdata;
sd->iommu = val;
}
#endif /* CONFIG_CALGARY_IOMMU */
extern int (*pci_config_read)(int seg, int bus, int dev, int fn,
int reg, int len, u32 *value);
extern int (*pci_config_write)(int seg, int bus, int dev, int fn,
int reg, int len, u32 value);
extern void dma32_reserve_bootmem(void);
#endif /* __KERNEL__ */
#endif /* _ASM_X86_PCI_64_H */