diff options
Diffstat (limited to 'drivers/iommu')
-rw-r--r-- | drivers/iommu/Kconfig | 2 | ||||
-rw-r--r-- | drivers/iommu/dma-iommu.c | 34 | ||||
-rw-r--r-- | drivers/iommu/iommu.c | 15 | ||||
-rw-r--r-- | drivers/iommu/s390-iommu.c | 18 |
4 files changed, 43 insertions, 26 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index f14f2e401073..8ad8618b3530 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -308,6 +308,7 @@ config APPLE_DART config ARM_SMMU tristate "ARM Ltd. System MMU (SMMU) Support" depends on ARM64 || ARM || (COMPILE_TEST && !GENERIC_ATOMIC64) + depends on QCOM_SCM || !QCOM_SCM #if QCOM_SCM=m this can't be =y select IOMMU_API select IOMMU_IO_PGTABLE_LPAE select ARM_DMA_USE_IOMMU if ARM @@ -437,6 +438,7 @@ config QCOM_IOMMU # Note: iommu drivers cannot (yet?) be built as modules bool "Qualcomm IOMMU Support" depends on ARCH_QCOM || (COMPILE_TEST && !GENERIC_ATOMIC64) + depends on QCOM_SCM=y select IOMMU_API select IOMMU_IO_PGTABLE_LPAE select ARM_DMA_USE_IOMMU diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index d0bc8c06e1a4..896bea04c347 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -523,7 +523,7 @@ static void __iommu_dma_unmap_swiotlb(struct device *dev, dma_addr_t dma_addr, __iommu_dma_unmap(dev, dma_addr, size); - if (unlikely(is_swiotlb_buffer(phys))) + if (unlikely(is_swiotlb_buffer(dev, phys))) swiotlb_tbl_unmap_single(dev, phys, size, dir, attrs); } @@ -594,7 +594,7 @@ static dma_addr_t __iommu_dma_map_swiotlb(struct device *dev, phys_addr_t phys, } iova = __iommu_dma_map(dev, phys, aligned_size, prot, dma_mask); - if (iova == DMA_MAPPING_ERROR && is_swiotlb_buffer(phys)) + if (iova == DMA_MAPPING_ERROR && is_swiotlb_buffer(dev, phys)) swiotlb_tbl_unmap_single(dev, phys, org_size, dir, attrs); return iova; } @@ -801,7 +801,7 @@ static void iommu_dma_sync_single_for_cpu(struct device *dev, if (!dev_is_dma_coherent(dev)) arch_sync_dma_for_cpu(phys, size, dir); - if (is_swiotlb_buffer(phys)) + if (is_swiotlb_buffer(dev, phys)) swiotlb_sync_single_for_cpu(dev, phys, size, dir); } @@ -814,7 +814,7 @@ static void iommu_dma_sync_single_for_device(struct device *dev, return; phys = iommu_iova_to_phys(iommu_get_dma_domain(dev), dma_handle); - if (is_swiotlb_buffer(phys)) + if (is_swiotlb_buffer(dev, phys)) swiotlb_sync_single_for_device(dev, phys, size, dir); if (!dev_is_dma_coherent(dev)) @@ -835,7 +835,7 @@ static void iommu_dma_sync_sg_for_cpu(struct device *dev, if (!dev_is_dma_coherent(dev)) arch_sync_dma_for_cpu(sg_phys(sg), sg->length, dir); - if (is_swiotlb_buffer(sg_phys(sg))) + if (is_swiotlb_buffer(dev, sg_phys(sg))) swiotlb_sync_single_for_cpu(dev, sg_phys(sg), sg->length, dir); } @@ -852,7 +852,7 @@ static void iommu_dma_sync_sg_for_device(struct device *dev, return; for_each_sg(sgl, sg, nelems, i) { - if (is_swiotlb_buffer(sg_phys(sg))) + if (is_swiotlb_buffer(dev, sg_phys(sg))) swiotlb_sync_single_for_device(dev, sg_phys(sg), sg->length, dir); @@ -990,7 +990,7 @@ static int iommu_dma_map_sg_swiotlb(struct device *dev, struct scatterlist *sg, out_unmap: iommu_dma_unmap_sg_swiotlb(dev, sg, i, dir, attrs | DMA_ATTR_SKIP_CPU_SYNC); - return 0; + return -EIO; } /* @@ -1011,11 +1011,13 @@ static int iommu_dma_map_sg(struct device *dev, struct scatterlist *sg, dma_addr_t iova; size_t iova_len = 0; unsigned long mask = dma_get_seg_boundary(dev); + ssize_t ret; int i; - if (static_branch_unlikely(&iommu_deferred_attach_enabled) && - iommu_deferred_attach(dev, domain)) - return 0; + if (static_branch_unlikely(&iommu_deferred_attach_enabled)) { + ret = iommu_deferred_attach(dev, domain); + goto out; + } if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) iommu_dma_sync_sg_for_device(dev, sg, nents, dir); @@ -1063,14 +1065,17 @@ static int iommu_dma_map_sg(struct device *dev, struct scatterlist *sg, } iova = iommu_dma_alloc_iova(domain, iova_len, dma_get_mask(dev), dev); - if (!iova) + if (!iova) { + ret = -ENOMEM; goto out_restore_sg; + } /* * We'll leave any physical concatenation to the IOMMU driver's * implementation - it knows better than we do. */ - if (iommu_map_sg_atomic(domain, iova, sg, nents, prot) < iova_len) + ret = iommu_map_sg_atomic(domain, iova, sg, nents, prot); + if (ret < iova_len) goto out_free_iova; return __finalise_sg(dev, sg, nents, iova); @@ -1079,7 +1084,10 @@ out_free_iova: iommu_dma_free_iova(cookie, iova, iova_len, NULL); out_restore_sg: __invalidate_sg(sg, nents); - return 0; +out: + if (ret != -ENOMEM) + return -EINVAL; + return ret; } static void iommu_dma_unmap_sg(struct device *dev, struct scatterlist *sg, diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index b4499b1915fa..3303d707bab4 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -2650,9 +2650,9 @@ size_t iommu_unmap_fast(struct iommu_domain *domain, } EXPORT_SYMBOL_GPL(iommu_unmap_fast); -static size_t __iommu_map_sg(struct iommu_domain *domain, unsigned long iova, - struct scatterlist *sg, unsigned int nents, int prot, - gfp_t gfp) +static ssize_t __iommu_map_sg(struct iommu_domain *domain, unsigned long iova, + struct scatterlist *sg, unsigned int nents, int prot, + gfp_t gfp) { const struct iommu_ops *ops = domain->ops; size_t len = 0, mapped = 0; @@ -2693,19 +2693,18 @@ out_err: /* undo mappings already done */ iommu_unmap(domain, iova, mapped); - return 0; - + return ret; } -size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova, - struct scatterlist *sg, unsigned int nents, int prot) +ssize_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova, + struct scatterlist *sg, unsigned int nents, int prot) { might_sleep(); return __iommu_map_sg(domain, iova, sg, nents, prot, GFP_KERNEL); } EXPORT_SYMBOL_GPL(iommu_map_sg); -size_t iommu_map_sg_atomic(struct iommu_domain *domain, unsigned long iova, +ssize_t iommu_map_sg_atomic(struct iommu_domain *domain, unsigned long iova, struct scatterlist *sg, unsigned int nents, int prot) { return __iommu_map_sg(domain, iova, sg, nents, prot, GFP_ATOMIC); diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c index 6019e58ce4fb..83df387e70a3 100644 --- a/drivers/iommu/s390-iommu.c +++ b/drivers/iommu/s390-iommu.c @@ -90,7 +90,7 @@ static int s390_iommu_attach_device(struct iommu_domain *domain, struct zpci_dev *zdev = to_zpci_dev(dev); struct s390_domain_device *domain_device; unsigned long flags; - int rc; + int cc, rc; if (!zdev) return -ENODEV; @@ -99,14 +99,21 @@ static int s390_iommu_attach_device(struct iommu_domain *domain, if (!domain_device) return -ENOMEM; - if (zdev->dma_table) - zpci_dma_exit_device(zdev); + if (zdev->dma_table) { + cc = zpci_dma_exit_device(zdev); + if (cc) { + rc = -EIO; + goto out_free; + } + } zdev->dma_table = s390_domain->dma_table; - rc = zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma, + cc = zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma, (u64) zdev->dma_table); - if (rc) + if (cc) { + rc = -EIO; goto out_restore; + } spin_lock_irqsave(&s390_domain->list_lock, flags); /* First device defines the DMA range limits */ @@ -130,6 +137,7 @@ static int s390_iommu_attach_device(struct iommu_domain *domain, out_restore: zpci_dma_init_device(zdev); +out_free: kfree(domain_device); return rc; |