mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-13 23:34:05 +08:00
sh: pci: Consolidate pci_iomap() and use the generic I/O base.
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:
parent
394b6d2fe6
commit
0bb34a6bf1
@ -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);
|
||||
|
@ -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);
|
||||
|
@ -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);
|
||||
|
@ -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. */
|
||||
|
@ -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);
|
||||
|
Loading…
Reference in New Issue
Block a user