On Tue, Jun 09, 2015 at 12:20:43AM +0800, Jiang Liu wrote: > Enhance ACPI resource parsing interfaces to support sparse IO space, > which will be used to share common code between x86 and IA64 later. > > Tested-by: Tony Luck <tony.luck@xxxxxxxxx> > Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx> > Reviewed-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx> > --- > drivers/acpi/resource.c | 9 ++++++--- > include/linux/ioport.h | 1 + > 2 files changed, 7 insertions(+), 3 deletions(-) > > diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c > index 8244f013f210..fdcc73dad2c1 100644 > --- a/drivers/acpi/resource.c > +++ b/drivers/acpi/resource.c > @@ -123,7 +123,7 @@ bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res) > EXPORT_SYMBOL_GPL(acpi_dev_resource_memory); > > static void acpi_dev_ioresource_flags(struct resource *res, u64 len, > - u8 io_decode) > + u8 io_decode, u8 translation_type) > { > res->flags = IORESOURCE_IO; > > @@ -135,6 +135,8 @@ static void acpi_dev_ioresource_flags(struct resource *res, u64 len, > > if (io_decode == ACPI_DECODE_16) > res->flags |= IORESOURCE_IO_16BIT_ADDR; > + if (translation_type == ACPI_SPARSE_TRANSLATION) > + res->flags |= IORESOURCE_IO_SPARSE; > } > > static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len, > @@ -142,7 +144,7 @@ static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len, > { > res->start = start; > res->end = start + len - 1; > - acpi_dev_ioresource_flags(res, len, io_decode); > + acpi_dev_ioresource_flags(res, len, io_decode, 0); > } > > /** > @@ -227,7 +229,8 @@ static bool acpi_decode_space(struct resource_win *win, > acpi_dev_memresource_flags(res, len, wp); > break; > case ACPI_IO_RANGE: > - acpi_dev_ioresource_flags(res, len, iodec); > + acpi_dev_ioresource_flags(res, len, iodec, > + addr->info.io.translation_type); > break; > case ACPI_BUS_NUMBER_RANGE: > res->flags = IORESOURCE_BUS; > diff --git a/include/linux/ioport.h b/include/linux/ioport.h > index 388e3ae94f7a..24bea087e7af 100644 > --- a/include/linux/ioport.h > +++ b/include/linux/ioport.h > @@ -94,6 +94,7 @@ struct resource { > /* PnP I/O specific bits (IORESOURCE_BITS) */ > #define IORESOURCE_IO_16BIT_ADDR (1<<0) > #define IORESOURCE_IO_FIXED (1<<1) > +#define IORESOURCE_IO_SPARSE (1<<2) I don't really like this bit. We adding a new generic IORESOURCE_* bit just for a special case, and it's only used in one place, for one arch, during enumeration. Don't we have a similar problem (struct resource can't express all the information from an ACPI resource) for the _TRA value for bridge windows? If it's a similar issue, we should solve it in a similar way. > /* PCI ROM control bits (IORESOURCE_BITS) */ > #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ > -- > 1.7.10.4 > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html