2014-11-13 13:36 GMT-08:00 Andreas Herrmann
<andreas.herrm...@caviumnetworks.com>:
> ehci-octeon driver used a 64-bit dma_mask. With removal of ehci-octeon
> and usage of ehci-platform ehci dma_mask is now limited to 32 bits
> (coerced in ehci_platform_probe).
>
> Provide a flag in ehci platform data to allow use of 64 bits for
> dma_mask.
Why not just allow enforcing an arbitrary DMA mask?
>
> Cc: David Daney <david.da...@cavium.com>
> Cc: Alex Smith <alex.sm...@imgtec.com>
> Cc: Alan Stern <st...@rowland.harvard.edu>
> Signed-off-by: Andreas Herrmann <andreas.herrm...@caviumnetworks.com>
> ---
> arch/mips/cavium-octeon/octeon-platform.c | 4 +---
> drivers/usb/host/ehci-platform.c | 3 ++-
> include/linux/usb/ehci_pdriver.h | 1 +
> 3 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/arch/mips/cavium-octeon/octeon-platform.c
> b/arch/mips/cavium-octeon/octeon-platform.c
> index eea60b6..12410a2 100644
> --- a/arch/mips/cavium-octeon/octeon-platform.c
> +++ b/arch/mips/cavium-octeon/octeon-platform.c
> @@ -310,6 +310,7 @@ static struct usb_ehci_pdata octeon_ehci_pdata = {
> #ifdef __BIG_ENDIAN
> .big_endian_mmio = 1,
> #endif
> + .dma_mask_64 = 1,
> .power_on = octeon_ehci_power_on,
> .power_off = octeon_ehci_power_off,
> };
> @@ -331,8 +332,6 @@ static void __init octeon_ehci_hw_start(struct device
> *dev)
> octeon2_usb_clocks_stop();
> }
>
> -static u64 octeon_ehci_dma_mask = DMA_BIT_MASK(64);
> -
> static int __init octeon_ehci_device_init(void)
> {
> struct platform_device *pd;
> @@ -347,7 +346,6 @@ static int __init octeon_ehci_device_init(void)
> if (!pd)
> return 0;
>
> - pd->dev.dma_mask = &octeon_ehci_dma_mask;
> pd->dev.platform_data = &octeon_ehci_pdata;
> octeon_ehci_hw_start(&pd->dev);
>
> diff --git a/drivers/usb/host/ehci-platform.c
> b/drivers/usb/host/ehci-platform.c
> index 2da18ea..6df808b 100644
> --- a/drivers/usb/host/ehci-platform.c
> +++ b/drivers/usb/host/ehci-platform.c
> @@ -155,7 +155,8 @@ static int ehci_platform_probe(struct platform_device
> *dev)
> if (!pdata)
> pdata = &ehci_platform_defaults;
>
> - err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
> + err = dma_coerce_mask_and_coherent(&dev->dev,
> + pdata->dma_mask_64 ? DMA_BIT_MASK(64) : DMA_BIT_MASK(32));
> if (err)
> return err;
>
> diff --git a/include/linux/usb/ehci_pdriver.h
> b/include/linux/usb/ehci_pdriver.h
> index 7eb4dcd..f69529e 100644
> --- a/include/linux/usb/ehci_pdriver.h
> +++ b/include/linux/usb/ehci_pdriver.h
> @@ -45,6 +45,7 @@ struct usb_ehci_pdata {
> unsigned big_endian_desc:1;
> unsigned big_endian_mmio:1;
> unsigned no_io_watchdog:1;
> + unsigned dma_mask_64:1;
>
> /* Turn on all power and clocks */
> int (*power_on)(struct platform_device *pdev);
> --
> 1.7.9.5
>
>
--
Florian
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