Commit 325ef185 authored by Christoph Hellwig's avatar Christoph Hellwig
Browse files

PCI: remove PCI_DMA_BUS_IS_PHYS 



This was used by the ide, scsi and networking code in the past to
determine if they should bounce payloads.  Now that the dma mapping
always have to support dma to all physical memory (thanks to swiotlb
for non-iommu systems) there is no need to this crude hack any more.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Acked-by: Palmer Dabbelt <palmer@sifive.com> (for riscv)
Reviewed-by: default avatarJens Axboe <axboe@kernel.dk>
parent ab74cfeb

arch/alpha/include/asm/pci.h

+0 −5
Original line number Diff line number Diff line
@@ -56,11 +56,6 @@ struct pci_controller { 


/* IOMMU controls.  */



/* The PCI address space does not equal the physical memory address space.

   The networking and block device layers use this boolean for bounce buffer

   decisions.  */

#define PCI_DMA_BUS_IS_PHYS  0



/* TODO: integrate with include/asm-generic/pci.h ? */

static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)

{

arch/arc/include/asm/pci.h

+0 −6
Original line number Diff line number Diff line
@@ -16,12 +16,6 @@ 
#define PCIBIOS_MIN_MEM 0x100000



#define pcibios_assign_all_busses()	1

/*

 * The PCI address space does equal the physical memory address space.

 * The networking and block device layers use this boolean for bounce

 * buffer decisions.

 */

#define PCI_DMA_BUS_IS_PHYS	1



#endif /* __KERNEL__ */

arch/arm/include/asm/pci.h

+0 −7
Original line number Diff line number Diff line
@@ -19,13 +19,6 @@ static inline int pci_proc_domain(struct pci_bus *bus) 
}

#endif /* CONFIG_PCI_DOMAINS */



/*

 * The PCI address space does equal the physical memory address space.

 * The networking and block device layers use this boolean for bounce

 * buffer decisions.

 */

#define PCI_DMA_BUS_IS_PHYS     (1)



#define HAVE_PCI_MMAP

#define ARCH_GENERIC_PCI_MMAP_RESOURCE

arch/arm64/include/asm/pci.h

+0 −5
Original line number Diff line number Diff line
@@ -18,11 +18,6 @@ 
#define pcibios_assign_all_busses() \

	(pci_has_flag(PCI_REASSIGN_ALL_BUS))



/*

 * PCI address space differs from physical memory address space

 */

#define PCI_DMA_BUS_IS_PHYS	(0)



#define ARCH_GENERIC_PCI_MMAP_RESOURCE	1



extern int isa_dma_bridge_buggy;

arch/h8300/include/asm/pci.h

+0 −2
Original line number Diff line number Diff line
@@ -15,6 +15,4 @@ static inline void pcibios_penalize_isa_irq(int irq, int active) 
	/* We don't do dynamic PCI IRQ allocation */

}



#define PCI_DMA_BUS_IS_PHYS	(1)



#endif /* _ASM_H8300_PCI_H */

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