diff options
Diffstat (limited to 'arch/arm/plat-omap/iommu.c')
| -rw-r--r-- | arch/arm/plat-omap/iommu.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/arch/arm/plat-omap/iommu.c b/arch/arm/plat-omap/iommu.c index bc094dbacee6..a202a2ce6e3d 100644 --- a/arch/arm/plat-omap/iommu.c +++ b/arch/arm/plat-omap/iommu.c @@ -370,6 +370,23 @@ void flush_iotlb_all(struct iommu *obj) } EXPORT_SYMBOL_GPL(flush_iotlb_all); +/** + * iommu_set_twl - enable/disable table walking logic + * @obj: target iommu + * @on: enable/disable + * + * Function used to enable/disable TWL. If one wants to work + * exclusively with locked TLB entries and receive notifications + * for TLB miss then call this function to disable TWL. + */ +void iommu_set_twl(struct iommu *obj, bool on) +{ + clk_enable(obj->clk); + arch_iommu->set_twl(obj, on); + clk_disable(obj->clk); +} +EXPORT_SYMBOL_GPL(iommu_set_twl); + #if defined(CONFIG_OMAP_IOMMU_DEBUG_MODULE) ssize_t iommu_dump_ctx(struct iommu *obj, char *buf, ssize_t bytes) @@ -653,7 +670,7 @@ void iopgtable_lookup_entry(struct iommu *obj, u32 da, u32 **ppgd, u32 **ppte) if (!*iopgd) goto out; - if (*iopgd & IOPGD_TABLE) + if (iopgd_is_table(*iopgd)) iopte = iopte_offset(iopgd, da); out: *ppgd = iopgd; @@ -670,7 +687,7 @@ static size_t iopgtable_clear_entry_core(struct iommu *obj, u32 da) if (!*iopgd) return 0; - if (*iopgd & IOPGD_TABLE) { + if (iopgd_is_table(*iopgd)) { int i; u32 *iopte = iopte_offset(iopgd, da); @@ -745,7 +762,7 @@ static void iopgtable_clear_entry_all(struct iommu *obj) if (!*iopgd) continue; - if (*iopgd & IOPGD_TABLE) + if (iopgd_is_table(*iopgd)) iopte_free(iopte_offset(iopgd, 0)); *iopgd = 0; @@ -783,9 +800,11 @@ static irqreturn_t iommu_fault_handler(int irq, void *data) if (!stat) return IRQ_HANDLED; + iommu_disable(obj); + iopgd = iopgd_offset(obj, da); - if (!(*iopgd & IOPGD_TABLE)) { + if (!iopgd_is_table(*iopgd)) { dev_err(obj->dev, "%s: da:%08x pgd:%p *pgd:%08x\n", __func__, da, iopgd, *iopgd); return IRQ_NONE; |