From bf2a5e717a47d042ca5f9f438cf186633f23033b Mon Sep 17 00:00:00 2001 From: Tomasz Figa Date: Fri, 23 Mar 2018 15:38:06 +0800 Subject: iommu/rockchip: Fix TLB flush of secondary IOMMUs Due to the bug in current code, only first IOMMU has the TLB lines flushed in rk_iommu_zap_lines. This patch fixes the inner loop to execute for all IOMMUs and properly flush the TLB. Signed-off-by: Tomasz Figa Signed-off-by: Jeffy Chen Signed-off-by: Joerg Roedel --- drivers/iommu/rockchip-iommu.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) (limited to 'drivers/iommu/rockchip-iommu.c') diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c index 7130d92ff79c..c3df53e480ea 100644 --- a/drivers/iommu/rockchip-iommu.c +++ b/drivers/iommu/rockchip-iommu.c @@ -274,19 +274,21 @@ static void rk_iommu_base_command(void __iomem *base, u32 command) { writel(command, base + RK_MMU_COMMAND); } -static void rk_iommu_zap_lines(struct rk_iommu *iommu, dma_addr_t iova, +static void rk_iommu_zap_lines(struct rk_iommu *iommu, dma_addr_t iova_start, size_t size) { int i; - - dma_addr_t iova_end = iova + size; + dma_addr_t iova_end = iova_start + size; /* * TODO(djkurtz): Figure out when it is more efficient to shootdown the * entire iotlb rather than iterate over individual iovas. */ - for (i = 0; i < iommu->num_mmu; i++) - for (; iova < iova_end; iova += SPAGE_SIZE) + for (i = 0; i < iommu->num_mmu; i++) { + dma_addr_t iova; + + for (iova = iova_start; iova < iova_end; iova += SPAGE_SIZE) rk_iommu_write(iommu->bases[i], RK_MMU_ZAP_ONE_LINE, iova); + } } static bool rk_iommu_is_stall_active(struct rk_iommu *iommu) -- cgit v1.2.3