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linux-next/arch/mips/lib/iomap-pci.c
Michael S. Tsirkin 0f3b3956c4 mips: use the the PCI controller's io_map_base
commit eab90291d3
(mips: switch to GENERIC_PCI_IOMAP)
failed to take into account the PCI controller's
io_map_base for mapping IO BARs.
This also caused a new warning on mips.

Fix this, without re-introducing code duplication,
by setting NO_GENERIC_PCI_IOPORT_MAP
and supplying a mips-specific __pci_ioport_map.

Reported-by: Kevin Cernekee <cernekee@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2012-01-31 23:20:30 +02:00

49 lines
1.3 KiB
C

/*
* Implement the default iomap interfaces
*
* (C) Copyright 2004 Linus Torvalds
* (C) Copyright 2006 Ralf Baechle <ralf@linux-mips.org>
* (C) Copyright 2007 MIPS Technologies, Inc.
* written by Ralf Baechle <ralf@linux-mips.org>
*/
#include <linux/pci.h>
#include <linux/module.h>
#include <asm/io.h>
void __iomem *__pci_ioport_map(struct pci_dev *dev,
unsigned long port, unsigned int nr)
{
struct pci_controller *ctrl = dev->bus->sysdata;
unsigned long base = ctrl->io_map_base;
/* This will eventually become a BUG_ON but for now be gentle */
if (unlikely(!ctrl->io_map_base)) {
struct pci_bus *bus = dev->bus;
char name[8];
while (bus->parent)
bus = bus->parent;
ctrl->io_map_base = base = mips_io_port_base;
sprintf(name, "%04x:%02x", pci_domain_nr(bus), bus->number);
printk(KERN_WARNING "io_map_base of root PCI bus %s unset. "
"Trying to continue but you better\nfix this issue or "
"report it to linux-mips@linux-mips.org or your "
"vendor.\n", name);
#ifdef CONFIG_PCI_DOMAINS
panic("To avoid data corruption io_map_base MUST be set with "
"multiple PCI domains.");
#endif
}
return (void __iomem *) (ctrl->io_map_base + port);
}
void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
{
iounmap(addr);
}
EXPORT_SYMBOL(pci_iounmap);