Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless

[karo-tx-linux.git] / drivers / iommu / amd_iommu_init.c

diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index c7a5d7e14547e2292ac70e81f1f4a1395f40c292..bdea288dc185c619e7e944a2959ed215e2a22c10 100644 (file)
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -306,6 +306,16 @@ static void iommu_feature_disable(struct amd_iommu *iommu, u8 bit)
        writel(ctrl, iommu->mmio_base + MMIO_CONTROL_OFFSET);
 }
 
+static void iommu_set_inv_tlb_timeout(struct amd_iommu *iommu, int timeout)
+{
+       u32 ctrl;
+
+       ctrl = readl(iommu->mmio_base + MMIO_CONTROL_OFFSET);
+       ctrl &= ~CTRL_INV_TO_MASK;
+       ctrl |= (timeout << CONTROL_INV_TIMEOUT) & CTRL_INV_TO_MASK;
+       writel(ctrl, iommu->mmio_base + MMIO_CONTROL_OFFSET);
+}
+
 /* Function to enable the hardware */
 static void iommu_enable(struct amd_iommu *iommu)
 {
@@ -1300,6 +1310,9 @@ static void iommu_init_flags(struct amd_iommu *iommu)
         * make IOMMU memory accesses cache coherent
         */
        iommu_feature_enable(iommu, CONTROL_COHERENT_EN);
+
+       /* Set IOTLB invalidation timeout to 1s */
+       iommu_set_inv_tlb_timeout(iommu, CTRL_INV_TO_1S);
 }
 
 static void iommu_apply_resume_quirks(struct amd_iommu *iommu)
@@ -1396,13 +1409,6 @@ static void amd_iommu_resume(void)
 
        /* re-load the hardware */
        enable_iommus();
-
-       /*
-        * we have to flush after the IOMMUs are enabled because a
-        * disabled IOMMU will never execute the commands we send
-        */
-       for_each_iommu(iommu)
-               iommu_flush_all_caches(iommu);
 }
 
 static int amd_iommu_suspend(void)