diff --git a/drivers/iommu/sun50i-iommu.c b/drivers/iommu/sun50i-iommu.c index e62e245060ac..5cb2d44dfb92 100644 --- a/drivers/iommu/sun50i-iommu.c +++ b/drivers/iommu/sun50i-iommu.c @@ -93,6 +93,8 @@ #define NUM_PT_ENTRIES 256 #define PT_SIZE (NUM_PT_ENTRIES * PT_ENTRY_SIZE) +#define SPAGE_SIZE 4096 + struct sun50i_iommu { struct iommu_device iommu; @@ -295,6 +297,62 @@ static void sun50i_table_flush(struct sun50i_iommu_domain *sun50i_domain, dma_sync_single_for_device(iommu->dev, dma, size, DMA_TO_DEVICE); } +static void sun50i_iommu_zap_iova(struct sun50i_iommu *iommu, + unsigned long iova) +{ + u32 reg; + int ret; + + iommu_write(iommu, IOMMU_TLB_IVLD_ADDR_REG, iova); + iommu_write(iommu, IOMMU_TLB_IVLD_ADDR_MASK_REG, GENMASK(31, 12)); + iommu_write(iommu, IOMMU_TLB_IVLD_ENABLE_REG, + IOMMU_TLB_IVLD_ENABLE_ENABLE); + + ret = readl_poll_timeout_atomic(iommu->base + IOMMU_TLB_IVLD_ENABLE_REG, + reg, !reg, 1, 2000); + if (ret) + dev_warn(iommu->dev, "TLB invalidation timed out!\n"); +} + +static void sun50i_iommu_zap_ptw_cache(struct sun50i_iommu *iommu, + unsigned long iova) +{ + u32 reg; + int ret; + + iommu_write(iommu, IOMMU_PC_IVLD_ADDR_REG, iova); + iommu_write(iommu, IOMMU_PC_IVLD_ENABLE_REG, + IOMMU_PC_IVLD_ENABLE_ENABLE); + + ret = readl_poll_timeout_atomic(iommu->base + IOMMU_PC_IVLD_ENABLE_REG, + reg, !reg, 1, 2000); + if (ret) + dev_warn(iommu->dev, "PTW cache invalidation timed out!\n"); +} + +static void sun50i_iommu_zap_range(struct sun50i_iommu *iommu, + unsigned long iova, size_t size) +{ + assert_spin_locked(&iommu->iommu_lock); + + iommu_write(iommu, IOMMU_AUTO_GATING_REG, 0); + + sun50i_iommu_zap_iova(iommu, iova); + sun50i_iommu_zap_iova(iommu, iova + SPAGE_SIZE); + if (size > SPAGE_SIZE) { + sun50i_iommu_zap_iova(iommu, iova + size); + sun50i_iommu_zap_iova(iommu, iova + size + SPAGE_SIZE); + } + sun50i_iommu_zap_ptw_cache(iommu, iova); + sun50i_iommu_zap_ptw_cache(iommu, iova + SZ_1M); + if (size > SZ_1M) { + sun50i_iommu_zap_ptw_cache(iommu, iova + size); + sun50i_iommu_zap_ptw_cache(iommu, iova + size + SZ_1M); + } + + iommu_write(iommu, IOMMU_AUTO_GATING_REG, IOMMU_AUTO_GATING_ENABLE); +} + static int sun50i_iommu_flush_all_tlb(struct sun50i_iommu *iommu) { u32 reg; @@ -344,6 +402,18 @@ static void sun50i_iommu_flush_iotlb_all(struct iommu_domain *domain) spin_unlock_irqrestore(&iommu->iommu_lock, flags); } +static void sun50i_iommu_iotlb_sync_map(struct iommu_domain *domain, + unsigned long iova, size_t size) +{ + struct sun50i_iommu_domain *sun50i_domain = to_sun50i_domain(domain); + struct sun50i_iommu *iommu = sun50i_domain->iommu; + unsigned long flags; + + spin_lock_irqsave(&iommu->iommu_lock, flags); + sun50i_iommu_zap_range(iommu, iova, size); + spin_unlock_irqrestore(&iommu->iommu_lock, flags); +} + static void sun50i_iommu_iotlb_sync(struct iommu_domain *domain, struct iommu_iotlb_gather *gather) { @@ -767,6 +837,7 @@ static const struct iommu_ops sun50i_iommu_ops = { .attach_dev = sun50i_iommu_attach_device, .detach_dev = sun50i_iommu_detach_device, .flush_iotlb_all = sun50i_iommu_flush_iotlb_all, + .iotlb_sync_map = sun50i_iommu_iotlb_sync_map, .iotlb_sync = sun50i_iommu_iotlb_sync, .iova_to_phys = sun50i_iommu_iova_to_phys, .map = sun50i_iommu_map, @@ -786,6 +857,8 @@ static void sun50i_iommu_report_fault(struct sun50i_iommu *iommu, report_iommu_fault(iommu->domain, iommu->dev, iova, prot); else dev_err(iommu->dev, "Page fault while iommu not attached to any domain?\n"); + + sun50i_iommu_zap_range(iommu, iova, SPAGE_SIZE); } static phys_addr_t sun50i_iommu_handle_pt_irq(struct sun50i_iommu *iommu,