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98d9f30c82
powerpc has two different ways of matching PCI devices to their corresponding OF node (if any) for historical reasons. The ppc64 one does a scan looking for matching bus/dev/fn, while the ppc32 one does a scan looking only for matching dev/fn on each level in order to be agnostic to busses being renumbered (which Linux does on some platforms). This removes both and instead moves the matching code to the PCI core itself. It's the most logical place to do it: when a pci_dev is created, we know the parent and thus can do a single level scan for the matching device_node (if any). The benefit is that all archs now get the matching for free. There's one hook the arch might want to provide to match a PHB bus to its device node. A default weak implementation is provided that looks for the parent device device node, but it's not entirely reliable on powerpc for various reasons so powerpc provides its own. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Michal Simek <monstr@monstr.eu> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
207 lines
5.9 KiB
C
207 lines
5.9 KiB
C
#ifndef __ASM_POWERPC_PCI_H
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#define __ASM_POWERPC_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/pci-bridge.h>
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#include <asm-generic/pci-dma-compat.h>
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/* Return values for ppc_md.pci_probe_mode function */
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#define PCI_PROBE_NONE -1 /* Don't look at this bus at all */
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#define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */
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#define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */
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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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/* 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 (don't do that on ppc64 yet !)
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*/
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#define pcibios_assign_all_busses() \
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(ppc_pci_has_flag(PPC_PCI_REASSIGN_ALL_BUS))
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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, 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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#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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#ifdef CONFIG_PCI
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extern void set_pci_dma_ops(struct dma_map_ops *dma_ops);
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extern struct dma_map_ops *get_pci_dma_ops(void);
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#else /* CONFIG_PCI */
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#define set_pci_dma_ops(d)
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#define get_pci_dma_ops() NULL
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#endif
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#ifdef CONFIG_PPC64
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/*
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* We want to avoid touching the cacheline size or MWI bit.
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* pSeries firmware sets the cacheline size (which is not the cpu cacheline
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* size in all cases) and hardware treats MWI the same as memory write.
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*/
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#define PCI_DISABLE_MWI
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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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unsigned long cacheline_size;
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u8 byte;
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pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
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if (byte == 0)
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cacheline_size = 1024;
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else
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cacheline_size = (int) byte * 4;
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*strat = PCI_DMA_BURST_MULTIPLE;
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*strategy_parameter = cacheline_size;
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}
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#endif
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#else /* 32-bit */
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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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#endif /* CONFIG_PPC64 */
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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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/* MSI arch hooks */
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#define arch_setup_msi_irqs arch_setup_msi_irqs
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#define arch_teardown_msi_irqs arch_teardown_msi_irqs
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#define arch_msi_check_device arch_msi_check_device
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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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extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
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size_t count);
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extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
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size_t count);
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extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
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struct vm_area_struct *vma,
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enum pci_mmap_state mmap_state);
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#define HAVE_PCI_LEGACY 1
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#ifdef CONFIG_PPC64
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/* The PCI address space does not equal the physical memory address
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* space (we have an IOMMU). The IDE and SCSI 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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#else /* 32-bit */
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/* The PCI address space does equal the physical memory
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* address space (no IOMMU). The IDE and SCSI 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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#endif /* CONFIG_PPC64 */
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extern void pcibios_resource_to_bus(struct pci_dev *dev,
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struct pci_bus_region *region,
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struct resource *res);
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extern void pcibios_bus_to_resource(struct pci_dev *dev,
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struct resource *res,
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struct pci_bus_region *region);
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extern void pcibios_claim_one_bus(struct pci_bus *b);
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extern void pcibios_finish_adding_to_bus(struct pci_bus *bus);
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extern void pcibios_resource_survey(void);
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extern struct pci_controller *init_phb_dynamic(struct device_node *dn);
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extern int remove_phb_dynamic(struct pci_controller *phb);
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extern struct pci_dev *of_create_pci_dev(struct device_node *node,
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struct pci_bus *bus, int devfn);
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extern void of_scan_pci_bridge(struct pci_dev *dev);
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extern void of_scan_bus(struct device_node *node, struct pci_bus *bus);
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extern void of_rescan_bus(struct device_node *node, struct pci_bus *bus);
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extern int pci_read_irq_line(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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resource_size_t *start, resource_size_t *end);
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extern void pcibios_setup_bus_devices(struct pci_bus *bus);
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extern void pcibios_setup_bus_self(struct pci_bus *bus);
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extern void pcibios_setup_phb_io_space(struct pci_controller *hose);
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extern void pcibios_scan_phb(struct pci_controller *hose);
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#endif /* __KERNEL__ */
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#endif /* __ASM_POWERPC_PCI_H */
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