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325ef1857f
This was used by the ide, scsi and networking code in the past to determine if they should bounce payloads. Now that the dma mapping always have to support dma to all physical memory (thanks to swiotlb for non-iommu systems) there is no need to this crude hack any more. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Palmer Dabbelt <palmer@sifive.com> (for riscv) Reviewed-by: Jens Axboe <axboe@kernel.dk>
151 lines
3.9 KiB
C
151 lines
3.9 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef _ASM_PCI_H
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#define _ASM_PCI_H
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#include <linux/mm.h>
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#ifdef __KERNEL__
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/*
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* This file essentially defines the interface between board
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* specific PCI code and MIPS common PCI code. Should potentially put
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* into include/asm/pci.h file.
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*/
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#include <linux/ioport.h>
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#include <linux/list.h>
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#include <linux/of.h>
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#ifdef CONFIG_PCI_DRIVERS_LEGACY
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/*
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* Each pci channel is a top-level PCI bus seem by CPU. A machine with
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* multiple PCI channels may have multiple PCI host controllers or a
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* single controller supporting multiple channels.
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*/
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struct pci_controller {
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struct list_head list;
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struct pci_bus *bus;
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struct device_node *of_node;
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struct pci_ops *pci_ops;
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struct resource *mem_resource;
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unsigned long mem_offset;
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struct resource *io_resource;
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unsigned long io_offset;
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unsigned long io_map_base;
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struct resource *busn_resource;
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#ifndef CONFIG_PCI_DOMAINS_GENERIC
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unsigned int index;
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/* For compatibility with current (as of July 2003) pciutils
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and XFree86. Eventually will be removed. */
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unsigned int need_domain_info;
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#endif
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/* Optional access methods for reading/writing the bus number
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of the PCI controller */
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int (*get_busno)(void);
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void (*set_busno)(int busno);
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};
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/*
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* Used by boards to register their PCI busses before the actual scanning.
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*/
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extern void register_pci_controller(struct pci_controller *hose);
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/*
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* board supplied pci irq fixup routine
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*/
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extern int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
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/* Do platform specific device initialization at pci_enable_device() time */
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extern int pcibios_plat_dev_init(struct pci_dev *dev);
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extern char * (*pcibios_plat_setup)(char *str);
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#ifdef CONFIG_OF
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/* this function parses memory ranges from a device node */
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extern void pci_load_of_ranges(struct pci_controller *hose,
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struct device_node *node);
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#else
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static inline void pci_load_of_ranges(struct pci_controller *hose,
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struct device_node *node) {}
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#endif
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#ifdef CONFIG_PCI_DOMAINS_GENERIC
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static inline void set_pci_need_domain_info(struct pci_controller *hose,
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int need_domain_info)
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{
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/* nothing to do */
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}
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#elif defined(CONFIG_PCI_DOMAINS)
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static inline void set_pci_need_domain_info(struct pci_controller *hose,
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int need_domain_info)
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{
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hose->need_domain_info = need_domain_info;
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}
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#endif /* CONFIG_PCI_DOMAINS */
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#endif
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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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static inline unsigned int pcibios_assign_all_busses(void)
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{
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return 1;
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}
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extern unsigned long PCIBIOS_MIN_IO;
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extern unsigned long PCIBIOS_MIN_MEM;
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#define PCIBIOS_MIN_CARDBUS_IO 0x4000
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#define HAVE_PCI_MMAP
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#define ARCH_GENERIC_PCI_MMAP_RESOURCE
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#define HAVE_ARCH_PCI_RESOURCE_TO_USER
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/*
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* Dynamic DMA mapping stuff.
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* MIPS has everything mapped statically.
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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/scatterlist.h>
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#include <linux/string.h>
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#include <asm/io.h>
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#ifdef CONFIG_PCI_DOMAINS_GENERIC
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static inline int pci_proc_domain(struct pci_bus *bus)
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{
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return pci_domain_nr(bus);
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}
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#elif defined(CONFIG_PCI_DOMAINS)
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#define pci_domain_nr(bus) ((struct pci_controller *)(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_controller *hose = bus->sysdata;
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return hose->need_domain_info;
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}
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#endif /* CONFIG_PCI_DOMAINS */
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#endif /* __KERNEL__ */
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/* Do platform specific device initialization at pci_enable_device() time */
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extern int pcibios_plat_dev_init(struct pci_dev *dev);
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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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#endif /* _ASM_PCI_H */
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