On Wed, Feb 16, 2011 at 1:35 PM, David Cohen <dacohen@xxxxxxxxx> wrote:
> Add support to register an isr for IOMMU fault situations and adapt it
> to allow such (*isr)() to be used as fault callback. Drivers using IOMMU
> module might want to be informed when errors happen in order to debug it
> or react.
>
> Signed-off-by: David Cohen <dacohen@xxxxxxxxx>
> ---
> arch/arm/mach-omap2/iommu2.c | 17 +++++++++-
> arch/arm/plat-omap/include/plat/iommu.h | 14 ++++++++-
> arch/arm/plat-omap/iommu.c | 52 ++++++++++++++++++++++---------
> 3 files changed, 65 insertions(+), 18 deletions(-)
>
....
> @@ -917,6 +912,33 @@ void iommu_put(struct iommu *obj)
> }
> EXPORT_SYMBOL_GPL(iommu_put);
>
> +int iommu_set_isr(const char *name,
> + int (*isr)(struct iommu *obj, u32 da, u32 iommu_errs,
> + void *priv),
> + void *isr_priv)
> +{
> + struct device *dev;
> + struct iommu *obj;
> +
if the driver support multiple user for the same iommu why can only
one callback be registered? should it support register multiple
callback function (one per user)?
Regards,
Fernando.
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