39a90865f0
This copies the pci_config_lock idea from x86 over, allowing us to kill off a couple of existing private locks. At the same time, these need to be converted to raw spinlocks for -rt kernels, so we make that change at the same time. This should make it easier for future parts to get the locking right instead of inevitable ending up with lock type mismatches. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
142 lines
4.1 KiB
C
142 lines
4.1 KiB
C
#ifndef __ASM_SH_PCI_H
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#define __ASM_SH_PCI_H
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#ifdef __KERNEL__
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/* Can be used to override the logic in pci_scan_bus for skipping
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already-configured bus numbers - to be used for buggy BIOSes
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or architectures with incomplete PCI setup by the loader */
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#define pcibios_assign_all_busses() 1
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/*
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* A board can define one or more PCI channels that represent built-in (or
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* external) PCI controllers.
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*/
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struct pci_channel {
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struct pci_channel *next;
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struct pci_bus *bus;
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struct pci_ops *pci_ops;
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struct resource *resources;
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unsigned int nr_resources;
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unsigned long io_offset;
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unsigned long mem_offset;
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unsigned long reg_base;
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unsigned long io_map_base;
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unsigned int index;
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unsigned int need_domain_info;
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/* Optional error handling */
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struct timer_list err_timer, serr_timer;
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unsigned int err_irq, serr_irq;
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};
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/* arch/sh/drivers/pci/pci.c */
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extern raw_spinlock_t pci_config_lock;
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extern int register_pci_controller(struct pci_channel *hose);
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extern void pcibios_report_status(unsigned int status_mask, int warn);
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/* arch/sh/drivers/pci/common.c */
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extern int early_read_config_byte(struct pci_channel *hose, int top_bus,
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int bus, int devfn, int offset, u8 *value);
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extern int early_read_config_word(struct pci_channel *hose, int top_bus,
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int bus, int devfn, int offset, u16 *value);
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extern int early_read_config_dword(struct pci_channel *hose, int top_bus,
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int bus, int devfn, int offset, u32 *value);
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extern int early_write_config_byte(struct pci_channel *hose, int top_bus,
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int bus, int devfn, int offset, u8 value);
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extern int early_write_config_word(struct pci_channel *hose, int top_bus,
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int bus, int devfn, int offset, u16 value);
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extern int early_write_config_dword(struct pci_channel *hose, int top_bus,
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int bus, int devfn, int offset, u32 value);
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extern void pcibios_enable_timers(struct pci_channel *hose);
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extern unsigned int pcibios_handle_status_errors(unsigned long addr,
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unsigned int status, struct pci_channel *hose);
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extern int pci_is_66mhz_capable(struct pci_channel *hose,
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int top_bus, int current_bus);
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extern unsigned long PCIBIOS_MIN_IO, PCIBIOS_MIN_MEM;
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struct pci_dev;
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#define HAVE_PCI_MMAP
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extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
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enum pci_mmap_state mmap_state, int write_combine);
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extern void pcibios_set_master(struct pci_dev *dev);
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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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/* Dynamic DMA mapping stuff.
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* SuperH has everything mapped statically like x86.
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*/
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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 (dma_ops->is_phys)
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#ifdef CONFIG_PCI
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/*
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* None of the SH PCI controllers support MWI, it is always treated as a
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* direct memory write.
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*/
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#define PCI_DISABLE_MWI
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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 = L1_CACHE_BYTES;
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else
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cacheline_size = byte << 2;
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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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/* Board-specific fixup routines. */
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int pcibios_map_platform_irq(struct pci_dev *dev, u8 slot, u8 pin);
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extern void pcibios_resource_to_bus(struct pci_dev *dev,
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struct pci_bus_region *region, struct resource *res);
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extern void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
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struct pci_bus_region *region);
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#define pci_domain_nr(bus) ((struct pci_channel *)(bus)->sysdata)->index
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static inline int pci_proc_domain(struct pci_bus *bus)
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{
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struct pci_channel *hose = bus->sysdata;
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return hose->need_domain_info;
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}
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/* Chances are this interrupt is wired PC-style ... */
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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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return channel ? 15 : 14;
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}
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/* generic DMA-mapping stuff */
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#include <asm-generic/pci-dma-compat.h>
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#endif /* __KERNEL__ */
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#endif /* __ASM_SH_PCI_H */
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