[PATCH v3 2/2] OMAP: IOMMU: add support to callback during fault handling
From: Guzman Lugo, Fernando <hidden>
Date: 2011-02-23 01:17:26
Also in:
linux-omap
On Wed, Feb 16, 2011 at 1:35 PM, David Cohen [off-list ref] 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 <redacted> --- ?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(-)
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quoted hunk ↗ jump to hunk
@@ -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.