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Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1m6zJN-0005Lg-Sm; Fri, 23 Jul 2021 11:50:14 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.92) (envelope-from ) id 1m6zJK-0005qW-Eh; Fri, 23 Jul 2021 11:50:10 -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 Date: Fri, 23 Jul 2021 11:49:47 -0600 Message-Id: <20210723175008.22410-1-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 v2 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) Cc: Robin Murphy , Martin Oliveira , Stephen Bates , Logan Gunthorpe , Christoph Hellwig X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Hi, This v2 of the series is spun out and expanded from my work to add P2PDMA support to DMA map operations[1]. v1 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/20210715164544.6827-1-logang@deltatee.com/ -- 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 | 86 ++++++++++++++++++++++--- 23 files changed, 181 insertions(+), 117 deletions(-) base-commit: 2734d6c1b1a089fb593ef6a23d4b70903526fe0c -- 2.20.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu