| Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 1 | Upstream-Status: Inappropriate [Workaround] |
| 2 | Signed-off-by: Manoj Kumar <manoj.kumar3@arm.com> |
| 3 | |
| 4 | From 949ba3f12ec1f3177a82a9228dc402ab5d8c9d60 Mon Sep 17 00:00:00 2001 |
| 5 | From: Manoj Kumar <manoj.kumar3@arm.com> |
| 6 | Date: Mon, 1 Feb 2021 21:36:43 +0530 |
| 7 | Subject: [PATCH 1/5] iommu/arm-smmu-v3: workaround for ATC_INV_SIZE_ALL in |
| 8 | N1SDP |
| 9 | |
| 10 | ATC_INV_SIZE_ALL request should automatically translate to ATS |
| 11 | address which is not happening in SMMUv3 version gone into |
| 12 | N1SDP platform. This workaround manually sets the ATS address |
| 13 | field to proper value for ATC_INV_SIZE_ALL command. |
| 14 | |
| 15 | Change-Id: If89465be94720a62be85e1e6612f17e93fa9b8a5 |
| 16 | Signed-off-by: Manoj Kumar <manoj.kumar3@arm.com> |
| 17 | Signed-off-by: Khasim Syed Mohammed <khasim.mohammed@arm.com> |
| 18 | --- |
| 19 | drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 1 + |
| 20 | drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 1 + |
| 21 | 2 files changed, 2 insertions(+) |
| 22 | |
| 23 | diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c |
| 24 | index a388e318f86e..ceca576b0bf6 100644 |
| 25 | --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c |
| 26 | +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c |
| 27 | @@ -1724,6 +1724,7 @@ arm_smmu_atc_inv_to_cmd(int ssid, unsigned long iova, size_t size, |
| 28 | }; |
| 29 | |
| 30 | if (!size) { |
| 31 | + cmd->atc.addr = ATC_INV_ADDR_ALL; |
| 32 | cmd->atc.size = ATC_INV_SIZE_ALL; |
| 33 | return; |
| 34 | } |
| 35 | diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h |
| 36 | index 4cb136f07914..5615ffd24e46 100644 |
| 37 | --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h |
| 38 | +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h |
| 39 | @@ -473,6 +473,7 @@ struct arm_smmu_cmdq_ent { |
| 40 | |
| 41 | #define CMDQ_OP_ATC_INV 0x40 |
| 42 | #define ATC_INV_SIZE_ALL 52 |
| 43 | + #define ATC_INV_ADDR_ALL 0x7FFFFFFFFFFFF000UL |
| 44 | struct { |
| 45 | u32 sid; |
| 46 | u32 ssid; |
| 47 | -- |
| 48 | 2.17.1 |
| 49 | |