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[SCSI] aic7xxx: fix MMIO for PPC 44x platforms 

The driver stores the PCI resource address into 'u_long' variable before
calling ioremap_nocache() on it. This warrants kernel oops when the registers
are accessed on PPC 44x platforms which (being 32-bit) have PCI memory space
mapped beyond 4 GB.

The arch/ppc/ kernel has a fixup in ioremap() that helps create an illusion
that the PCI memory resources are mapped below 4 GB, but arch/powerpc/ code
got rid of this trick, having instead CONFIG_RESOURCES_64BIT enabled.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Sergei Shtylyov 2008-04-18 23:30:45 +04:00 коммит произвёл James Bottomley
Родитель be0d67680d
Коммит 448504130f
2 изменённых файлов: 10 добавлений и 10 удалений
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2
drivers/scsi/aic7xxx/aic7xxx_osm.h
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@ -365,7 +365,7 @@ struct ahc_platform_data {
#define AHC_LINUX_NOIRQ ((uint32_t)~0)
uint32_t irq; /* IRQ for this adapter */
uint32_t bios_address;
uint32_t mem_busaddr; /* Mem Base Addr */
resource_size_t mem_busaddr; /* Mem Base Addr */
};
/************************** OS Utility Wrappers *******************************/

18
drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
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@ -344,7 +344,7 @@ ahc_linux_pci_exit(void)
}
static int
ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, u_long *base)
ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, resource_size_t *base)
{
if (aic7xxx_allow_memio == 0)
return (ENOMEM);
@ -359,10 +359,10 @@ ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, u_long *base)
static int
ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
u_long *bus_addr,
resource_size_t *bus_addr,
uint8_t __iomem **maddr)
{
u_long start;
resource_size_t start;
int error;
error = 0;
@ -387,7 +387,7 @@ int
ahc_pci_map_registers(struct ahc_softc *ahc)
{
uint32_t command;
u_long base;
resource_size_t base;
uint8_t __iomem *maddr;
int error;
@ -425,12 +425,12 @@ ahc_pci_map_registers(struct ahc_softc *ahc)
} else
command |= PCIM_CMD_MEMEN;
} else {
printf("aic7xxx: PCI%d:%d:%d MEM region 0x%lx "
printf("aic7xxx: PCI%d:%d:%d MEM region 0x%llx "
"unavailable. Cannot memory map device.\n",
ahc_get_pci_bus(ahc->dev_softc),
ahc_get_pci_slot(ahc->dev_softc),
ahc_get_pci_function(ahc->dev_softc),
base);
(unsigned long long)base);
}
/*
@ -441,15 +441,15 @@ ahc_pci_map_registers(struct ahc_softc *ahc)
error = ahc_linux_pci_reserve_io_region(ahc, &base);
if (error == 0) {
ahc->tag = BUS_SPACE_PIO;
ahc->bsh.ioport = base;
ahc->bsh.ioport = (u_long)base;
command |= PCIM_CMD_PORTEN;
} else {
printf("aic7xxx: PCI%d:%d:%d IO region 0x%lx[0..255] "
printf("aic7xxx: PCI%d:%d:%d IO region 0x%llx[0..255] "
"unavailable. Cannot map device.\n",
ahc_get_pci_bus(ahc->dev_softc),
ahc_get_pci_slot(ahc->dev_softc),
ahc_get_pci_function(ahc->dev_softc),
base);
(unsigned long long)base);
}
}
ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);