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| author | David Cohen <dacohen@gmail.com> | 2011-02-16 19:35:51 +0000 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2011-02-24 14:23:17 -0800 |
| commit | d594f1f31afe13edd8c02f3854a65cc58cfb3b74 (patch) | |
| tree | 8986a9af7302b214316f9498d153be46c9c4df38 /arch/arm/plat-omap/include/plat/iommu.h | |
| parent | 92e753d7984db36f0a3c0bbf0f377da114768775 (diff) | |
| download | op-kernel-dev-d594f1f31afe13edd8c02f3854a65cc58cfb3b74.zip op-kernel-dev-d594f1f31afe13edd8c02f3854a65cc58cfb3b74.tar.gz | |
omap: IOMMU: add support to callback during fault handling
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@gmail.com>
Acked-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/plat-omap/include/plat/iommu.h')
| -rw-r--r-- | arch/arm/plat-omap/include/plat/iommu.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/arm/plat-omap/include/plat/iommu.h b/arch/arm/plat-omap/include/plat/iommu.h index 19cbb5e..174f1b9 100644 --- a/arch/arm/plat-omap/include/plat/iommu.h +++ b/arch/arm/plat-omap/include/plat/iommu.h @@ -31,6 +31,7 @@ struct iommu { struct clk *clk; void __iomem *regbase; struct device *dev; + void *isr_priv; unsigned int refcount; struct mutex iommu_lock; /* global for this whole object */ @@ -47,7 +48,7 @@ struct iommu { struct list_head mmap; struct mutex mmap_lock; /* protect mmap */ - int (*isr)(struct iommu *obj); + int (*isr)(struct iommu *obj, u32 da, u32 iommu_errs, void *priv); void *ctx; /* iommu context: registres saved area */ u32 da_start; @@ -109,6 +110,13 @@ struct iommu_platform_data { u32 da_end; }; +/* IOMMU errors */ +#define OMAP_IOMMU_ERR_TLB_MISS (1 << 0) +#define OMAP_IOMMU_ERR_TRANS_FAULT (1 << 1) +#define OMAP_IOMMU_ERR_EMU_MISS (1 << 2) +#define OMAP_IOMMU_ERR_TBLWALK_FAULT (1 << 3) +#define OMAP_IOMMU_ERR_MULTIHIT_FAULT (1 << 4) + #if defined(CONFIG_ARCH_OMAP1) #error "iommu for this processor not implemented yet" #else @@ -161,6 +169,10 @@ extern size_t iopgtable_clear_entry(struct iommu *obj, u32 iova); extern int iommu_set_da_range(struct iommu *obj, u32 start, u32 end); extern struct iommu *iommu_get(const char *name); extern void iommu_put(struct iommu *obj); +extern int iommu_set_isr(const char *name, + int (*isr)(struct iommu *obj, u32 da, u32 iommu_errs, + void *priv), + void *isr_priv); extern void iommu_save_ctx(struct iommu *obj); extern void iommu_restore_ctx(struct iommu *obj); |
