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sh: pci: Consolidate pci_iomap() and use the generic I/O base.

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This consolidates the pci_iomap() definitions and reworks how the I/O
port base is handled. PCI channels can register their own I/O map base,
or if none is provided, the system-wide generic I/O base is used instead.

Functionally nothing changes, while this allows us to kill off lots of
I/O address special casing and lookups.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2009-04-20 16:38:00 +09:00
parent 394b6d2fe6
commit 0bb34a6bf1
5 changed files with 53 additions and 94 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
arch/sh/drivers/pci/pci-lib.c
View File

@ -60,6 +60,57 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
vma->vm_page_prot);
}
static void __iomem *ioport_map_pci(struct pci_dev *dev,
unsigned long port, unsigned int nr)
{
struct pci_channel *chan = dev->sysdata;
if (!chan->io_map_base)
chan->io_map_base = generic_io_base;
return (void __iomem *)(chan->io_map_base + port);
}
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
{
resource_size_t start = pci_resource_start(dev, bar);
resource_size_t len = pci_resource_len(dev, bar);
unsigned long flags = pci_resource_flags(dev, bar);
if (unlikely(!len || !start))
return NULL;
if (maxlen && len > maxlen)
len = maxlen;
if (flags & IORESOURCE_IO)
return ioport_map_pci(dev, start, len);
/*
* Presently the IORESOURCE_MEM case is a bit special, most
* SH7751 style PCI controllers have PCI memory at a fixed
* location in the address space where no remapping is desired.
* With the IORESOURCE_MEM case more care has to be taken
* to inhibit page table mapping for legacy cores, but this is
* punted off to __ioremap().
* -- PFM.
*/
if (flags & IORESOURCE_MEM) {
if (flags & IORESOURCE_CACHEABLE)
return ioremap(start, len);
return ioremap_nocache(start, len);
}
return NULL;
}
EXPORT_SYMBOL(pci_iomap);
void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
{
iounmap(addr);
}
EXPORT_SYMBOL(pci_iounmap);
#ifdef CONFIG_HOTPLUG
EXPORT_SYMBOL(pcibios_resource_to_bus);
EXPORT_SYMBOL(pcibios_bus_to_resource);

35
arch/sh/drivers/pci/pci-new.c
View File

@ -187,39 +187,4 @@ void __init pcibios_update_irq(struct pci_dev *dev, int irq)
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
}
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
{
resource_size_t start = pci_resource_start(dev, bar);
resource_size_t len = pci_resource_len(dev, bar);
unsigned long flags = pci_resource_flags(dev, bar);
if (unlikely(!len || !start))
return NULL;
if (maxlen && len > maxlen)
len = maxlen;
/*
* Presently the IORESOURCE_MEM case is a bit special, most
* SH7751 style PCI controllers have PCI memory at a fixed
* location in the address space where no remapping is desired.
* With the IORESOURCE_MEM case more care has to be taken
* to inhibit page table mapping for legacy cores, but this is
* punted off to __ioremap().
* -- PFM.
*/
if (flags & IORESOURCE_IO)
return ioport_map(start, len);
if (flags & IORESOURCE_MEM)
return ioremap(start, len);
return NULL;
}
EXPORT_SYMBOL(pci_iomap);
void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
{
iounmap(addr);
}
EXPORT_SYMBOL(pci_iounmap);
EXPORT_SYMBOL(board_pci_channels);

35
arch/sh/drivers/pci/pci.c
View File

@ -144,39 +144,4 @@ void __init pcibios_update_irq(struct pci_dev *dev, int irq)
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
}
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
{
resource_size_t start = pci_resource_start(dev, bar);
resource_size_t len = pci_resource_len(dev, bar);
unsigned long flags = pci_resource_flags(dev, bar);
if (unlikely(!len || !start))
return NULL;
if (maxlen && len > maxlen)
len = maxlen;
/*
* Presently the IORESOURCE_MEM case is a bit special, most
* SH7751 style PCI controllers have PCI memory at a fixed
* location in the address space where no remapping is desired.
* With the IORESOURCE_MEM case more care has to be taken
* to inhibit page table mapping for legacy cores, but this is
* punted off to __ioremap().
* -- PFM.
*/
if (flags & IORESOURCE_IO)
return ioport_map(start, len);
if (flags & IORESOURCE_MEM)
return ioremap(start, len);
return NULL;
}
EXPORT_SYMBOL(pci_iomap);
void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
{
iounmap(addr);
}
EXPORT_SYMBOL(pci_iounmap);
EXPORT_SYMBOL(board_pci_channels);

22
arch/sh/include/asm/pci.h
View File

@ -26,6 +26,8 @@ struct pci_channel {
int enabled;
unsigned long reg_base;
unsigned long io_base;
unsigned long io_map_base;
};
/*
@ -110,31 +112,11 @@ static inline int __is_pci_memory(unsigned long phys_addr, unsigned long size)
}
return 0;
}
static inline void __iomem *__get_pci_io_base(unsigned long port,
unsigned long size)
{
struct pci_channel *p;
struct resource *res;
for (p = board_pci_channels; p->init; p++) {
res = p->io_resource;
if (p->enabled && (port >= res->start) &&
(port + size) <= (res->end + 1))
return (void __iomem *)(p->io_base + port);
}
return NULL;
}
#else
static inline int __is_pci_memory(unsigned long phys_addr, unsigned long size)
{
return 0;
}
static inline void __iomem *__get_pci_io_base(unsigned long port,
unsigned long size)
{
return NULL;
}
#endif
/* Board-specific fixup routines. */

4
arch/sh/kernel/io.c
View File

@ -70,10 +70,6 @@ void __iomem *ioport_map(unsigned long port, unsigned int nr)
if (ret)
return ret;
ret = __get_pci_io_base(port, nr);
if (ret)
return ret;
return __ioport_map(port, nr);
}
EXPORT_SYMBOL(ioport_map);