| Upstream-Status: Inappropriate [Workaround] |
| Signed-off-by: Manoj Kumar <manoj.kumar3@arm.com> |
| |
| From 949ba3f12ec1f3177a82a9228dc402ab5d8c9d60 Mon Sep 17 00:00:00 2001 |
| From: Manoj Kumar <manoj.kumar3@arm.com> |
| Date: Mon, 1 Feb 2021 21:36:43 +0530 |
| Subject: [PATCH 1/5] iommu/arm-smmu-v3: workaround for ATC_INV_SIZE_ALL in |
| N1SDP |
| |
| ATC_INV_SIZE_ALL request should automatically translate to ATS |
| address which is not happening in SMMUv3 version gone into |
| N1SDP platform. This workaround manually sets the ATS address |
| field to proper value for ATC_INV_SIZE_ALL command. |
| |
| Change-Id: If89465be94720a62be85e1e6612f17e93fa9b8a5 |
| Signed-off-by: Manoj Kumar <manoj.kumar3@arm.com> |
| Signed-off-by: Khasim Syed Mohammed <khasim.mohammed@arm.com> |
| --- |
| drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 1 + |
| drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 1 + |
| 2 files changed, 2 insertions(+) |
| |
| diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c |
| index a388e318f86e..ceca576b0bf6 100644 |
| --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c |
| +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c |
| @@ -1724,6 +1724,7 @@ arm_smmu_atc_inv_to_cmd(int ssid, unsigned long iova, size_t size, |
| }; |
| |
| if (!size) { |
| + cmd->atc.addr = ATC_INV_ADDR_ALL; |
| cmd->atc.size = ATC_INV_SIZE_ALL; |
| return; |
| } |
| diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h |
| index 4cb136f07914..5615ffd24e46 100644 |
| --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h |
| +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h |
| @@ -473,6 +473,7 @@ struct arm_smmu_cmdq_ent { |
| |
| #define CMDQ_OP_ATC_INV 0x40 |
| #define ATC_INV_SIZE_ALL 52 |
| + #define ATC_INV_ADDR_ALL 0x7FFFFFFFFFFFF000UL |
| struct { |
| u32 sid; |
| u32 ssid; |
| -- |
| 2.17.1 |
| |