8b150478ae
Change the phys_mem_access_prot() function to take a pfn instead of an address. This allows mmap64() to work on /dev/mem for addresses above 4G on 32-bit architectures. We start with a pfn in mmap_mem(), so there's no need to convert to an address; in fact, it's actively bad, since the conversion can overflow when the address is above 4G. Similarly fix the ppc32 page_is_ram() function to avoid a conversion to an address by directly comparing to max_pfn. Working with max_pfn instead of high_memory fixes page_is_ram() to give the right answer for highmem pages. Signed-off-by: Roland Dreier <rolandd@cisco.com> Cc: Anton Blanchard <anton@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
142 lines
3.9 KiB
C
142 lines
3.9 KiB
C
#ifndef __PPC_PCI_H
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#define __PPC_PCI_H
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#ifdef __KERNEL__
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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/mm.h>
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#include <asm/scatterlist.h>
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#include <asm/io.h>
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#include <asm/pci-bridge.h>
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#include <asm-generic/pci-dma-compat.h>
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struct pci_dev;
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/* Values for the `which' argument to sys_pciconfig_iobase syscall. */
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#define IOBASE_BRIDGE_NUMBER 0
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#define IOBASE_MEMORY 1
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#define IOBASE_IO 2
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#define IOBASE_ISA_IO 3
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#define IOBASE_ISA_MEM 4
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/*
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* Set this to 1 if you want the kernel to re-assign all PCI
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* bus numbers
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*/
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extern int pci_assign_all_buses;
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#define pcibios_assign_all_busses() (pci_assign_all_buses)
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#define pcibios_scan_all_fns(a, b) 0
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#define PCIBIOS_MIN_IO 0x1000
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#define PCIBIOS_MIN_MEM 0x10000000
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extern 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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extern inline void pcibios_penalize_isa_irq(int irq, int active)
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{
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/* We don't do dynamic PCI IRQ allocation */
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}
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extern unsigned long pci_resource_to_bus(struct pci_dev *pdev, struct resource *res);
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/*
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* The PCI bus bridge can translate addresses issued by the processor(s)
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* into a different address on the PCI bus. On 32-bit cpus, we assume
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* this mapping is 1-1, but on 64-bit systems it often isn't.
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*
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* Obsolete ! Drivers should now use pci_resource_to_bus
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*/
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extern unsigned long phys_to_bus(unsigned long pa);
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extern unsigned long pci_phys_to_bus(unsigned long pa, int busnr);
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extern unsigned long pci_bus_to_phys(unsigned int ba, int busnr);
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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 (1)
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/* pci_unmap_{page,single} is a nop so... */
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#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
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#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
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#define pci_unmap_addr(PTR, ADDR_NAME) (0)
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#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
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#define pci_unmap_len(PTR, LEN_NAME) (0)
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#define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
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#ifdef CONFIG_PCI
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static inline void pci_dma_burst_advice(struct pci_dev *pdev,
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enum pci_dma_burst_strategy *strat,
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unsigned long *strategy_parameter)
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{
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*strat = PCI_DMA_BURST_INFINITY;
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*strategy_parameter = ~0UL;
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}
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#endif
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/*
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* At present there are very few 32-bit PPC machines that can have
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* memory above the 4GB point, and we don't support that.
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*/
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#define pci_dac_dma_supported(pci_dev, mask) (0)
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/* Return the index of the PCI controller for device PDEV. */
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#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
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/* Set the name of the bus as it appears in /proc/bus/pci */
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static inline int pci_proc_domain(struct pci_bus *bus)
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{
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return 0;
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}
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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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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 void
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pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
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struct pci_bus_region *region);
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static inline struct resource *
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pcibios_select_root(struct pci_dev *pdev, struct resource *res)
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{
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struct resource *root = NULL;
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if (res->flags & IORESOURCE_IO)
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root = &ioport_resource;
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if (res->flags & IORESOURCE_MEM)
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root = &iomem_resource;
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return root;
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}
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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 pfn,
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unsigned long size,
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pgprot_t prot);
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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 /* __KERNEL__ */
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#endif /* __PPC_PCI_H */
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