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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c5611df968
Introduce 2 Kconfig symbols, CONFIG_PCI_DRIVERS_GENERIC & CONFIG_PCI_DRIVERS_LEGACY, which indicate whether the system should be built to for PCI drivers using the MIPS-specific struct pci_controller API (hereafter "legacy" drivers) or more generic drivers using only functionality provided by the PCI core (hereafter "generic" drivers). The Kconfig entries are created such that platforms have to select CONFIG_PCI_DRIVERS_GENERIC if they wish to use it - that is, the default is CONFIG_PCI_DRIVERS_LEGACY so that existing platforms need no modification. The functions declared in pci.h are rearranged with those provided only by pci-legacy.c being guarded by an #ifdef CONFIG_PCI_DRIVERS_LEGACY to ensure they are only used in configurations where they are implemented. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14345/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
/*
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* Implement the default iomap interfaces
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*
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* (C) Copyright 2004 Linus Torvalds
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* (C) Copyright 2006 Ralf Baechle <ralf@linux-mips.org>
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* (C) Copyright 2007 MIPS Technologies, Inc.
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* written by Ralf Baechle <ralf@linux-mips.org>
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*/
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#include <linux/pci.h>
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#include <linux/export.h>
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#include <asm/io.h>
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#ifdef CONFIG_PCI_DRIVERS_LEGACY
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void __iomem *__pci_ioport_map(struct pci_dev *dev,
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unsigned long port, unsigned int nr)
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{
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struct pci_controller *ctrl = dev->bus->sysdata;
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unsigned long base = ctrl->io_map_base;
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/* This will eventually become a BUG_ON but for now be gentle */
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if (unlikely(!ctrl->io_map_base)) {
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struct pci_bus *bus = dev->bus;
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char name[8];
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while (bus->parent)
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bus = bus->parent;
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ctrl->io_map_base = base = mips_io_port_base;
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sprintf(name, "%04x:%02x", pci_domain_nr(bus), bus->number);
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printk(KERN_WARNING "io_map_base of root PCI bus %s unset. "
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"Trying to continue but you better\nfix this issue or "
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"report it to linux-mips@linux-mips.org or your "
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"vendor.\n", name);
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#ifdef CONFIG_PCI_DOMAINS
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panic("To avoid data corruption io_map_base MUST be set with "
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"multiple PCI domains.");
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#endif
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}
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return (void __iomem *) (ctrl->io_map_base + port);
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}
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#endif /* CONFIG_PCI_DRIVERS_LEGACY */
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void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
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{
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iounmap(addr);
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}
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EXPORT_SYMBOL(pci_iounmap);
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