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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>
100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ALPHA_PCI_H
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#define __ALPHA_PCI_H
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#ifdef __KERNEL__
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#include <linux/spinlock.h>
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#include <linux/dma-mapping.h>
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#include <linux/scatterlist.h>
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#include <asm/machvec.h>
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/*
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* The following structure is used to manage multiple PCI busses.
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*/
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struct pci_iommu_arena;
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struct page;
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/* A controller. Used to manage multiple PCI busses. */
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struct pci_controller {
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struct pci_controller *next;
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struct pci_bus *bus;
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struct resource *io_space;
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struct resource *mem_space;
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/* The following are for reporting to userland. The invariant is
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that if we report a BWX-capable dense memory, we do not report
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a sparse memory at all, even if it exists. */
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unsigned long sparse_mem_base;
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unsigned long dense_mem_base;
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unsigned long sparse_io_base;
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unsigned long dense_io_base;
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/* This one's for the kernel only. It's in KSEG somewhere. */
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unsigned long config_space_base;
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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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struct pci_iommu_arena *sg_pci;
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struct pci_iommu_arena *sg_isa;
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void *sysdata;
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};
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/* Override the logic in pci_scan_bus for skipping already-configured
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bus numbers. */
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#define pcibios_assign_all_busses() 1
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#define PCIBIOS_MIN_IO alpha_mv.min_io_address
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#define PCIBIOS_MIN_MEM alpha_mv.min_mem_address
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/* IOMMU controls. */
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/* TODO: integrate with include/asm-generic/pci.h ? */
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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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#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 /* __KERNEL__ */
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/* Values for the `which' argument to sys_pciconfig_iobase. */
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#define IOBASE_HOSE 0
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#define IOBASE_SPARSE_MEM 1
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#define IOBASE_DENSE_MEM 2
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#define IOBASE_SPARSE_IO 3
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#define IOBASE_DENSE_IO 4
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#define IOBASE_ROOT_BUS 5
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#define IOBASE_FROM_HOSE 0x10000
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extern struct pci_dev *isa_bridge;
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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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extern void pci_adjust_legacy_attr(struct pci_bus *bus,
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enum pci_mmap_state mmap_type);
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#define HAVE_PCI_LEGACY 1
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extern int pci_create_resource_files(struct pci_dev *dev);
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extern void pci_remove_resource_files(struct pci_dev *dev);
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#endif /* __ALPHA_PCI_H */
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