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Thu, 29 Jul 2021 14:15:48 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.92) (envelope-from ) id 1m9CRT-0001TQ-GA; Thu, 29 Jul 2021 14:15:43 -0600 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, iommu@lists.linux-foundation.org, linux-parisc@vger.kernel.org, xen-devel@lists.xenproject.org Cc: Christoph Hellwig , Marek Szyprowski , Robin Murphy , Stephen Bates , Martin Oliveira , Logan Gunthorpe Date: Thu, 29 Jul 2021 14:15:18 -0600 Message-Id: <20210729201539.5602-1-logang@deltatee.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-parisc@vger.kernel.org, xen-devel@lists.xenproject.org, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, sbates@raithlin.com, martin.oliveira@eideticom.com, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [PATCH v3 00/21] .map_sg() error cleanup X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210729_131549_609051_FFA2681A X-CRM114-Status: GOOD ( 15.60 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, This v3 of the series is spun out and expanded from my work to add P2PDMA support to DMA map operations[1]. v2 is at [2]. The main changes in v1 are to more carefully define the meaning of the error codes for dma_map_sgtable(). The P2PDMA work requires distinguishing different error conditions in a map_sg operation. dma_map_sgtable() already allows for returning an error code (where as dma_map_sg() is only allowed to return zero) however, it currently only returns -EINVAL when a .map_sg() call returns zero. This series cleans up all .map_sg() implementations to return appropriate error codes. After the cleanup, dma_map_sg() will still return zero, however dma_map_sgtable() will pass the error code from the .map_sg() call. Thanks go to Martn Oliveira for doing a lot of the cleanup of the obscure implementations. The patch set is based off of v5.14-rc2 and a git repo can be found here: https://github.com/sbates130272/linux-p2pmem map_sg_err_cleanup_v2 Thanks, Logan [1] https://lore.kernel.org/linux-block/20210513223203.5542-1-logang@deltatee.com/ [2] https://lore.kernel.org/linux-mips/20210723175008.22410-1-logang@deltatee.com/ --- Changes in v3: - Move the validation of errnos into __dma_map_sg_attrs() (Per Christoph) - Fix the out of date commit message in patch 21 (Per Eike) Changes in v2: - Attempt to define the meanings of the errors returned by dma_map_sgtable() and restrict the valid return codes of .map_sg implementations. (Per Christoph) - Change dma_map_sgtable() to EXPORT_SYMBOL_GPL() (Per Christoph) - Add patches to remove the erroneous setting of sg->dma_address to DMA_MAP_ERROR in a few .map_sg(0 implementations. (Per Christoph). -- Logan Gunthorpe (10): dma-mapping: Allow map_sg() ops to return negative error codes dma-direct: Return appropriate error code from dma_direct_map_sg() iommu: Return full error code from iommu_map_sg[_atomic]() dma-iommu: Return error code from iommu_dma_map_sg() ARM/dma-mapping: don't set failed sg dma_address to DMA_MAPPING_ERROR powerpc/iommu: don't set failed sg dma_address to DMA_MAPPING_ERROR s390/pci: don't set failed sg dma_address to DMA_MAPPING_ERROR sparc/iommu: don't set failed sg dma_address to DMA_MAPPING_ERROR x86/amd_gart: don't set failed sg dma_address to DMA_MAPPING_ERROR dma-mapping: Disallow .map_sg operations from returning zero on error Martin Oliveira (11): alpha: return error code from alpha_pci_map_sg() ARM/dma-mapping: return error code from .map_sg() ops ia64/sba_iommu: return error code from sba_map_sg_attrs() MIPS/jazzdma: return error code from jazz_dma_map_sg() powerpc/iommu: return error code from .map_sg() ops s390/pci: return error code from s390_dma_map_sg() sparc/iommu: return error codes from .map_sg() ops parisc: return error code from .map_sg() ops xen: swiotlb: return error code from xen_swiotlb_map_sg() x86/amd_gart: return error code from gart_map_sg() dma-mapping: return error code from dma_dummy_map_sg() arch/alpha/kernel/pci_iommu.c | 10 ++- arch/arm/mm/dma-mapping.c | 26 +++++--- arch/ia64/hp/common/sba_iommu.c | 6 +- arch/mips/jazz/jazzdma.c | 2 +- arch/powerpc/kernel/iommu.c | 6 +- arch/powerpc/platforms/ps3/system-bus.c | 2 +- arch/powerpc/platforms/pseries/vio.c | 5 +- arch/s390/pci/pci_dma.c | 13 ++-- arch/sparc/kernel/iommu.c | 6 +- arch/sparc/kernel/pci_sun4v.c | 6 +- arch/sparc/mm/iommu.c | 2 +- arch/x86/kernel/amd_gart_64.c | 18 +++--- drivers/iommu/dma-iommu.c | 23 ++++--- drivers/iommu/iommu.c | 15 +++-- drivers/parisc/ccio-dma.c | 2 +- drivers/parisc/sba_iommu.c | 2 +- drivers/xen/swiotlb-xen.c | 2 +- include/linux/dma-map-ops.h | 5 +- include/linux/dma-mapping.h | 35 +++-------- include/linux/iommu.h | 22 +++---- kernel/dma/direct.c | 2 +- kernel/dma/dummy.c | 2 +- kernel/dma/mapping.c | 82 ++++++++++++++++++++++--- 23 files changed, 177 insertions(+), 117 deletions(-) base-commit: ff1176468d368232b684f75e82563369208bc371 -- 2.20.1