250 lines
7.4 KiB
C
250 lines
7.4 KiB
C
#ifndef __PPC64_PCI_H
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#define __PPC64_PCI_H
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#ifdef __KERNEL__
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/dma-mapping.h>
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#include <asm/machdep.h>
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#include <asm/scatterlist.h>
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#include <asm/io.h>
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#include <asm/prom.h>
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#define PCIBIOS_MIN_IO 0x1000
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#define PCIBIOS_MIN_MEM 0x10000000
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struct pci_dev;
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#ifdef CONFIG_PPC_ISERIES
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#define pcibios_scan_all_fns(a, b) 0
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#else
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extern int pcibios_scan_all_fns(struct pci_bus *bus, int devfn);
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#endif
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static inline void pcibios_set_master(struct pci_dev *dev)
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{
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/* No special bus mastering setup handling */
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}
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static inline void pcibios_penalize_isa_irq(int irq)
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{
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/* We don't do dynamic PCI IRQ allocation */
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}
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#define HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
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static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
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{
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if (ppc_md.pci_get_legacy_ide_irq)
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return ppc_md.pci_get_legacy_ide_irq(dev, channel);
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return channel ? 15 : 14;
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}
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#define HAVE_ARCH_PCI_MWI 1
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static inline int pcibios_prep_mwi(struct pci_dev *dev)
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{
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/*
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* We would like to avoid touching the cacheline size or MWI bit
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* but we cant do that with the current pcibios_prep_mwi
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* interface. pSeries firmware sets the cacheline size (which is not
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* the cpu cacheline size in all cases) and hardware treats MWI
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* the same as memory write. So we dont touch the cacheline size
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* here and allow the generic code to set the MWI bit.
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*/
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return 0;
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}
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extern unsigned int pcibios_assign_all_busses(void);
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/*
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* PCI DMA operations are abstracted for G5 vs. i/pSeries
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*/
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struct pci_dma_ops {
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void * (*pci_alloc_consistent)(struct pci_dev *hwdev, size_t size,
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dma_addr_t *dma_handle);
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void (*pci_free_consistent)(struct pci_dev *hwdev, size_t size,
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void *vaddr, dma_addr_t dma_handle);
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dma_addr_t (*pci_map_single)(struct pci_dev *hwdev, void *ptr,
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size_t size, enum dma_data_direction direction);
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void (*pci_unmap_single)(struct pci_dev *hwdev, dma_addr_t dma_addr,
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size_t size, enum dma_data_direction direction);
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int (*pci_map_sg)(struct pci_dev *hwdev, struct scatterlist *sg,
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int nents, enum dma_data_direction direction);
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void (*pci_unmap_sg)(struct pci_dev *hwdev, struct scatterlist *sg,
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int nents, enum dma_data_direction direction);
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int (*pci_dma_supported)(struct pci_dev *hwdev, u64 mask);
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int (*pci_dac_dma_supported)(struct pci_dev *hwdev, u64 mask);
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};
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extern struct pci_dma_ops pci_dma_ops;
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static inline void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
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dma_addr_t *dma_handle)
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{
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return pci_dma_ops.pci_alloc_consistent(hwdev, size, dma_handle);
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}
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static inline void pci_free_consistent(struct pci_dev *hwdev, size_t size,
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void *vaddr, dma_addr_t dma_handle)
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{
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pci_dma_ops.pci_free_consistent(hwdev, size, vaddr, dma_handle);
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}
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static inline dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr,
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size_t size, int direction)
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{
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return pci_dma_ops.pci_map_single(hwdev, ptr, size,
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(enum dma_data_direction)direction);
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}
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static inline void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr,
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size_t size, int direction)
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{
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pci_dma_ops.pci_unmap_single(hwdev, dma_addr, size,
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(enum dma_data_direction)direction);
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}
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static inline int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg,
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int nents, int direction)
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{
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return pci_dma_ops.pci_map_sg(hwdev, sg, nents,
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(enum dma_data_direction)direction);
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}
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static inline void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg,
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int nents, int direction)
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{
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pci_dma_ops.pci_unmap_sg(hwdev, sg, nents,
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(enum dma_data_direction)direction);
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}
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static inline void pci_dma_sync_single_for_cpu(struct pci_dev *hwdev,
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dma_addr_t dma_handle,
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size_t size, int direction)
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{
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BUG_ON(direction == PCI_DMA_NONE);
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/* nothing to do */
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}
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static inline void pci_dma_sync_single_for_device(struct pci_dev *hwdev,
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dma_addr_t dma_handle,
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size_t size, int direction)
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{
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BUG_ON(direction == PCI_DMA_NONE);
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/* nothing to do */
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}
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static inline void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev,
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struct scatterlist *sg,
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int nelems, int direction)
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{
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BUG_ON(direction == PCI_DMA_NONE);
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/* nothing to do */
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}
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static inline void pci_dma_sync_sg_for_device(struct pci_dev *hwdev,
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struct scatterlist *sg,
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int nelems, int direction)
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{
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BUG_ON(direction == PCI_DMA_NONE);
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/* nothing to do */
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}
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/* Return whether the given PCI device DMA address mask can
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* be supported properly. For example, if your device can
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* only drive the low 24-bits during PCI bus mastering, then
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* you would pass 0x00ffffff as the mask to this function.
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* We default to supporting only 32 bits DMA unless we have
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* an explicit override of this function in pci_dma_ops for
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* the platform
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*/
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static inline int pci_dma_supported(struct pci_dev *hwdev, u64 mask)
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{
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if (pci_dma_ops.pci_dma_supported)
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return pci_dma_ops.pci_dma_supported(hwdev, mask);
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return (mask < 0x100000000ull);
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}
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/* For DAC DMA, we currently don't support it by default, but
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* we let the platform override this
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*/
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static inline int pci_dac_dma_supported(struct pci_dev *hwdev,u64 mask)
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{
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if (pci_dma_ops.pci_dac_dma_supported)
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return pci_dma_ops.pci_dac_dma_supported(hwdev, mask);
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return 0;
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}
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static inline int pci_dma_mapping_error(dma_addr_t dma_addr)
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{
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return dma_mapping_error(dma_addr);
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}
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extern int pci_domain_nr(struct pci_bus *bus);
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/* Set the name of the bus as it appears in /proc/bus/pci */
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extern int pci_name_bus(char *name, struct pci_bus *bus);
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struct vm_area_struct;
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/* Map a range of PCI memory or I/O space for a device into user space */
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int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
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enum pci_mmap_state mmap_state, int write_combine);
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/* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */
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#define HAVE_PCI_MMAP 1
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#define pci_map_page(dev, page, off, size, dir) \
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pci_map_single(dev, (page_address(page) + (off)), size, dir)
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#define pci_unmap_page(dev,addr,sz,dir) pci_unmap_single(dev,addr,sz,dir)
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/* pci_unmap_{single,page} is not a nop, thus... */
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#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
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dma_addr_t ADDR_NAME;
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#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
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__u32 LEN_NAME;
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#define pci_unmap_addr(PTR, ADDR_NAME) \
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((PTR)->ADDR_NAME)
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#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
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(((PTR)->ADDR_NAME) = (VAL))
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#define pci_unmap_len(PTR, LEN_NAME) \
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((PTR)->LEN_NAME)
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#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
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(((PTR)->LEN_NAME) = (VAL))
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/* The PCI address space does equal the physical memory
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* address space. The networking and block device layers use
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* this boolean for bounce buffer decisions.
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*/
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#define PCI_DMA_BUS_IS_PHYS (0)
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extern void
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pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
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struct resource *res);
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extern int
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unmap_bus_range(struct pci_bus *bus);
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extern int
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remap_bus_range(struct pci_bus *bus);
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extern void
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pcibios_fixup_device_resources(struct pci_dev *dev, struct pci_bus *bus);
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extern struct pci_controller *init_phb_dynamic(struct device_node *dn);
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extern int pci_read_irq_line(struct pci_dev *dev);
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extern void pcibios_add_platform_entries(struct pci_dev *dev);
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#endif /* __KERNEL__ */
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#endif /* __PPC64_PCI_H */
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