Messages in this thread | | | Date | Mon, 01 Sep 2014 07:22:32 +0200 | From | Marek Szyprowski <> | Subject | Re: [PATCH 10/29] drivers: add DRIVER_HAS_OWN_IOMMU_MANAGER flag |
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Hi Greg,
On 2014-08-05 12:47, Marek Szyprowski wrote: > This patch adds a new flags for device drivers. This flag instructs > kernel that the device driver does it own management of IOMMU assisted > IO address space translations, so no default dma-mapping structures > should be initialized. > > Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> > --- > include/linux/device.h | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/include/linux/device.h b/include/linux/device.h > index 5f4ff02..2e62371 100644 > --- a/include/linux/device.h > +++ b/include/linux/device.h > @@ -253,6 +253,8 @@ struct device_driver { > > /* disables bind/unbind via sysfs */ > #define DRIVER_SUPPRESS_BIND_ATTRS (1 << 0) > +/* driver uses own methods to manage IO address space */ > +#define DRIVER_HAS_OWN_IOMMU_MANAGER (1 << 1) > > extern int __must_check driver_register(struct device_driver *drv); > extern void driver_unregister(struct device_driver *drv);
Could you comment if the approach of using flags in the struct driver could be accepted? I've converted suppress_bind_attrs entry to flags to avoid extending the structure, please see patch "[PATCH 05/29] drivers: convert suppress_bind_attrs parameter into flags".
Best regards -- Marek Szyprowski, PhD Samsung R&D Institute Poland
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