forked from Minki/linux
2311b1f2bb
This is an updated version of Ben's fix-pci-mmap-on-ppc-and-ppc64.patch which is in 2.6.12-rc4-mm1. It fixes the patch to work on PPC iSeries, removes some debug printks at Ben's request, and incorporates your fix-pci-mmap-on-ppc-and-ppc64-fix.patch also. Originally from Benjamin Herrenschmidt <benh@kernel.crashing.org> This patch was discussed at length on linux-pci and so far, the last iteration of it didn't raise any comment. It's effect is a nop on architecture that don't define the new pci_resource_to_user() callback anyway. It allows architecture like ppc who put weird things inside of PCI resource structures to convert to some different value for user visible ones. It also fixes mmap'ing of IO space on those archs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
150 lines
4.1 KiB
C
150 lines
4.1 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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#include <asm-generic/pci-dma-compat.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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extern struct dma_mapping_ops pci_dma_ops;
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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.dac_dma_supported)
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return pci_dma_ops.dac_dma_supported(&hwdev->dev, mask);
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return 0;
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}
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extern int pci_domain_nr(struct pci_bus *bus);
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/* Decide whether to display the domain number in /proc */
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extern int pci_proc_domain(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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/* 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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struct file;
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extern pgprot_t pci_phys_mem_access_prot(struct file *file,
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unsigned long offset,
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unsigned long size,
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pgprot_t prot);
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#ifdef CONFIG_PPC_MULTIPLATFORM
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#define HAVE_ARCH_PCI_RESOURCE_TO_USER
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extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
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const struct resource *rsrc,
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u64 *start, u64 *end);
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#endif /* CONFIG_PPC_MULTIPLATFORM */
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#endif /* __KERNEL__ */
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#endif /* __PPC64_PCI_H */
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