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powerpc/pci: Make IO workarounds init implicit when first bus is registered 

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Michael Ellerman 2011-04-11 21:25:02 +00:00 committed by Benjamin Herrenschmidt
parent 3cc30d0726
commit d1109b7529
4 changed files with 20 additions and 28 deletions
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1
arch/powerpc/include/asm/io-workarounds.h
View File

@ -31,7 +31,6 @@ struct iowa_bus {
void *private;
};
void __devinit io_workaround_init(void);
void __devinit iowa_register_bus(struct pci_controller *, struct ppc_pci_io *,
int (*)(struct iowa_bus *, void *), void *);
struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR);

27
arch/powerpc/kernel/io-workarounds.c
View File

@ -144,7 +144,19 @@ static void __iomem *iowa_ioremap(phys_addr_t addr, unsigned long size,
return res;
}
/* Regist new bus to support workaround */
/* Enable IO workaround */
static void __devinit io_workaround_init(void)
{
static int io_workaround_inited;
if (io_workaround_inited)
return;
ppc_pci_io = iowa_pci_io;
ppc_md.ioremap = iowa_ioremap;
io_workaround_inited = 1;
}
/* Register new bus to support workaround */
void __devinit iowa_register_bus(struct pci_controller *phb,
struct ppc_pci_io *ops,
int (*initfunc)(struct iowa_bus *, void *), void *data)
@ -152,6 +164,8 @@ void __devinit iowa_register_bus(struct pci_controller *phb,
struct iowa_bus *bus;
struct device_node *np = phb->dn;
io_workaround_init();
if (iowa_bus_count >= IOWA_MAX_BUS) {
pr_err("IOWA:Too many pci bridges, "
"workarounds disabled for %s\n", np->full_name);
@ -171,14 +185,3 @@ void __devinit iowa_register_bus(struct pci_controller *phb,
pr_debug("IOWA:[%d]Add bus, %s.\n", iowa_bus_count-1, np->full_name);
}
/* enable IO workaround */
void __devinit io_workaround_init(void)
{
static int io_workaround_inited;
if (io_workaround_inited)
return;
ppc_pci_io = iowa_pci_io;
ppc_md.ioremap = iowa_ioremap;
io_workaround_inited = 1;
}

18
arch/powerpc/platforms/cell/celleb_pci.c
View File

@ -468,18 +468,6 @@ static struct of_device_id celleb_phb_match[] __initdata = {
},
};
static int __init celleb_io_workaround_init(struct pci_controller *phb,
struct celleb_phb_spec *phb_spec)
{
if (phb_spec->ops) {
iowa_register_bus(phb, phb_spec->ops, phb_spec->iowa_init,
phb_spec->iowa_data);
io_workaround_init();
}
return 0;
}
int __init celleb_setup_phb(struct pci_controller *phb)
{
struct device_node *dev = phb->dn;
@ -499,7 +487,11 @@ int __init celleb_setup_phb(struct pci_controller *phb)
if (rc)
return 1;
return celleb_io_workaround_init(phb, phb_spec);
if (phb_spec->ops)
iowa_register_bus(phb, phb_spec->ops,
phb_spec->iowa_init,
phb_spec->iowa_data);
return 0;
}
int celleb_pci_probe_mode(struct pci_bus *bus)

2
arch/powerpc/platforms/cell/setup.c
View File

@ -136,8 +136,6 @@ static int __devinit cell_setup_phb(struct pci_controller *phb)
iowa_register_bus(phb, &spiderpci_ops, &spiderpci_iowa_init,
(void *)SPIDER_PCI_REG_BASE);
io_workaround_init();
return 0;
}