diff options
| -rw-r--r-- | drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 42 | ||||
| -rw-r--r-- | drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 1 |
2 files changed, 18 insertions, 25 deletions
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 c69d50e39b21..3c33ebffbe62 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -1217,29 +1217,17 @@ static void arm_smmu_sync_cd(struct arm_smmu_master *master, arm_smmu_cmdq_batch_submit(smmu, &cmds); } -static int arm_smmu_alloc_cd_leaf_table(struct arm_smmu_device *smmu, - struct arm_smmu_l1_ctx_desc *l1_desc) +static void arm_smmu_write_cd_l1_desc(__le64 *dst, dma_addr_t l2ptr_dma) { - size_t size = CTXDESC_L2_ENTRIES * (CTXDESC_CD_DWORDS << 3); + u64 val = (l2ptr_dma & CTXDESC_L1_DESC_L2PTR_MASK) | CTXDESC_L1_DESC_V; - l1_desc->l2ptr = dma_alloc_coherent(smmu->dev, size, - &l1_desc->l2ptr_dma, GFP_KERNEL); - if (!l1_desc->l2ptr) { - dev_warn(smmu->dev, - "failed to allocate context descriptor table\n"); - return -ENOMEM; - } - return 0; + /* The HW has 64 bit atomicity with stores to the L2 CD table */ + WRITE_ONCE(*dst, cpu_to_le64(val)); } -static void arm_smmu_write_cd_l1_desc(__le64 *dst, - struct arm_smmu_l1_ctx_desc *l1_desc) +static dma_addr_t arm_smmu_cd_l1_get_desc(const __le64 *src) { - u64 val = (l1_desc->l2ptr_dma & CTXDESC_L1_DESC_L2PTR_MASK) | - CTXDESC_L1_DESC_V; - - /* The HW has 64 bit atomicity with stores to the L2 CD table */ - WRITE_ONCE(*dst, cpu_to_le64(val)); + return le64_to_cpu(*src) & CTXDESC_L1_DESC_L2PTR_MASK; } struct arm_smmu_cd *arm_smmu_get_cd_ptr(struct arm_smmu_master *master, @@ -1281,13 +1269,18 @@ static struct arm_smmu_cd *arm_smmu_alloc_cd_ptr(struct arm_smmu_master *master, l1_desc = &cd_table->l1_desc[idx]; if (!l1_desc->l2ptr) { - __le64 *l1ptr; - - if (arm_smmu_alloc_cd_leaf_table(smmu, l1_desc)) + dma_addr_t l2ptr_dma; + size_t size; + + size = CTXDESC_L2_ENTRIES * sizeof(struct arm_smmu_cd); + l1_desc->l2ptr = dma_alloc_coherent(smmu->dev, size, + &l2ptr_dma, + GFP_KERNEL); + if (!l1_desc->l2ptr) return NULL; - l1ptr = cd_table->cdtab + idx * CTXDESC_L1_DESC_DWORDS; - arm_smmu_write_cd_l1_desc(l1ptr, l1_desc); + arm_smmu_write_cd_l1_desc(&cd_table->cdtab[idx], + l2ptr_dma); /* An invalid L1CD can be cached */ arm_smmu_sync_cd(master, ssid, false); } @@ -1480,7 +1473,8 @@ static void arm_smmu_free_cd_tables(struct arm_smmu_master *master) dma_free_coherent(smmu->dev, size, cd_table->l1_desc[i].l2ptr, - cd_table->l1_desc[i].l2ptr_dma); + arm_smmu_cd_l1_get_desc( + &cd_table->cdtab[i])); } kfree(cd_table->l1_desc); 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 33a8bee1b82e..8b5628771b96 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h @@ -619,7 +619,6 @@ struct arm_smmu_ctx_desc { struct arm_smmu_l1_ctx_desc { struct arm_smmu_cd *l2ptr; - dma_addr_t l2ptr_dma; }; struct arm_smmu_ctx_desc_cfg { |