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powerpc: Better split CONFIG_PPC_INDIRECT_PIO and CONFIG_PPC_INDIRECT_MMIO

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Remove the generic PPC_INDIRECT_IO and ensure we only add overhead
to the right accessors. IE. If only CONFIG_PPC_INDIRECT_PIO is set,
we don't add overhead to all MMIO accessors.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt
2013-07-15 13:03:08 +10:00
parent de021bb79c
commit ecd73cc5c9
5 changed files with 37 additions and 21 deletions
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19
arch/powerpc/kernel/io-workarounds.c
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@@ -53,6 +53,7 @@ static struct iowa_bus *iowa_pci_find(unsigned long vaddr, unsigned long paddr)
return NULL;
}
#ifdef CONFIG_PPC_INDIRECT_MMIO
struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR addr)
{
unsigned hugepage_shift;
@@ -90,13 +91,25 @@ struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR addr)
return bus;
}
#else /* CONFIG_PPC_INDIRECT_MMIO */
struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR addr)
{
return NULL;
}
#endif /* !CONFIG_PPC_INDIRECT_MMIO */
#ifdef CONFIG_PPC_INDIRECT_PIO
struct iowa_bus *iowa_pio_find_bus(unsigned long port)
{
unsigned long vaddr = (unsigned long)pci_io_base + port;
return iowa_pci_find(vaddr, 0);
}
#else
struct iowa_bus *iowa_pio_find_bus(unsigned long port)
{
return NULL;
}
#endif
#define DEF_PCI_AC_RET(name, ret, at, al, space, aa) \
static ret iowa_##name at \
@@ -137,6 +150,7 @@ static const struct ppc_pci_io iowa_pci_io = {
};
#ifdef CONFIG_PPC_INDIRECT_MMIO
static void __iomem *iowa_ioremap(phys_addr_t addr, unsigned long size,
unsigned long flags, void *caller)
{
@@ -151,6 +165,9 @@ static void __iomem *iowa_ioremap(phys_addr_t addr, unsigned long size,
}
return res;
}
#else /* CONFIG_PPC_INDIRECT_MMIO */
#define iowa_ioremap NULL
#endif /* !CONFIG_PPC_INDIRECT_MMIO */
/* Enable IO workaround */
static void io_workaround_init(void)