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https://github.com/torvalds/linux
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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>
134 lines
4 KiB
C
134 lines
4 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 <linux/scatterlist.h>
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#include <asm/machdep.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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/* Return values for pci_controller_ops.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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/* 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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(pci_has_flag(PCI_REASSIGN_ALL_BUS))
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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(const struct dma_map_ops *dma_ops);
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extern const 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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#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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struct vm_area_struct;
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/* Tell PCI code what kind of PCI resource mappings we support */
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#define HAVE_PCI_MMAP 1
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#define ARCH_GENERIC_PCI_MMAP_RESOURCE 1
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#define arch_can_pci_mmap_io() 1
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#define arch_can_pci_mmap_wc() 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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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 unsigned int pci_parse_of_flags(u32 addr0, int bridge);
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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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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 resource_size_t pcibios_io_space_offset(struct pci_controller *hose);
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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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extern struct pci_dev *pnv_pci_get_gpu_dev(struct pci_dev *npdev);
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extern struct pci_dev *pnv_pci_get_npu_dev(struct pci_dev *gpdev, int index);
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#endif /* __ASM_POWERPC_PCI_H */
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