From: Logan Gunthorpe <logang@deltatee.com> To: linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, linux-pci@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org Cc: "Stephen Bates" <sbates@raithlin.com>, "Christoph Hellwig" <hch@lst.de>, "Dan Williams" <dan.j.williams@intel.com>, "Jason Gunthorpe" <jgg@ziepe.ca>, "Christian König" <christian.koenig@amd.com>, "John Hubbard" <jhubbard@nvidia.com>, "Don Dutile" <ddutile@redhat.com>, "Matthew Wilcox" <willy@infradead.org>, "Daniel Vetter" <daniel.vetter@ffwll.ch>, "Jakowski Andrzej" <andrzej.jakowski@intel.com>, "Minturn Dave B" <dave.b.minturn@intel.com>, "Jason Ekstrand" <jason@jlekstrand.net>, "Dave Hansen" <dave.hansen@linux.intel.com>, "Xiong Jianxin" <jianxin.xiong@intel.com>, "Bjorn Helgaas" <helgaas@kernel.org>, "Ira Weiny" <ira.weiny@intel.com>, "Robin Murphy" <robin.murphy@arm.com>, "Martin Oliveira" <martin.oliveira@eideticom.com>, "Chaitanya Kulkarni" <ckulkarnilinux@gmail.com>, "Ralph Campbell" <rcampbell@nvidia.com>, "Logan Gunthorpe" <logang@deltatee.com>, "Jason Gunthorpe" <jgg@nvidia.com> Subject: [PATCH v6 05/21] dma-mapping: allow EREMOTEIO return code for P2PDMA transfers Date: Thu, 7 Apr 2022 09:47:01 -0600 [thread overview] Message-ID: <20220407154717.7695-6-logang@deltatee.com> (raw) In-Reply-To: <20220407154717.7695-1-logang@deltatee.com> Add EREMOTEIO error return to dma_map_sgtable() which will be used by .map_sg() implementations that detect P2PDMA pages that the underlying DMA device cannot access. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> --- kernel/dma/mapping.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index db7244291b74..9f65d1041638 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -197,7 +197,7 @@ static int __dma_map_sg_attrs(struct device *dev, struct scatterlist *sg, if (ents > 0) debug_dma_map_sg(dev, sg, nents, ents, dir, attrs); else if (WARN_ON_ONCE(ents != -EINVAL && ents != -ENOMEM && - ents != -EIO)) + ents != -EIO && ents != -EREMOTEIO)) return -EIO; return ents; @@ -255,6 +255,8 @@ EXPORT_SYMBOL(dma_map_sg_attrs); * complete the mapping. Should succeed if retried later. * -EIO Legacy error code with an unknown meaning. eg. this is * returned if a lower level call returned DMA_MAPPING_ERROR. + * -EREMOTEIO The DMA device cannot access P2PDMA memory specified in + * the sg_table. This will not succeed if retried. */ int dma_map_sgtable(struct device *dev, struct sg_table *sgt, enum dma_data_direction dir, unsigned long attrs) -- 2.30.2
WARNING: multiple messages have this Message-ID (diff)
From: Logan Gunthorpe <logang@deltatee.com> To: linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, linux-pci@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org Cc: "Daniel Vetter" <daniel.vetter@ffwll.ch>, "Dave Hansen" <dave.hansen@linux.intel.com>, "Stephen Bates" <sbates@raithlin.com>, "Jason Ekstrand" <jason@jlekstrand.net>, "Ira Weiny" <ira.weiny@intel.com>, "Christoph Hellwig" <hch@lst.de>, "Minturn Dave B" <dave.b.minturn@intel.com>, "Martin Oliveira" <martin.oliveira@eideticom.com>, "Matthew Wilcox" <willy@infradead.org>, "Jason Gunthorpe" <jgg@ziepe.ca>, "Chaitanya Kulkarni" <ckulkarnilinux@gmail.com>, "Bjorn Helgaas" <helgaas@kernel.org>, "Jason Gunthorpe" <jgg@nvidia.com>, "Ralph Campbell" <rcampbell@nvidia.com>, "John Hubbard" <jhubbard@nvidia.com>, "Dan Williams" <dan.j.williams@intel.com>, "Jakowski Andrzej" <andrzej.jakowski@intel.com>, "Xiong Jianxin" <jianxin.xiong@intel.com>, "Logan Gunthorpe" <logang@deltatee.com>, "Robin Murphy" <robin.murphy@arm.com>, "Christian König" <christian.koenig@amd.com> Subject: [PATCH v6 05/21] dma-mapping: allow EREMOTEIO return code for P2PDMA transfers Date: Thu, 7 Apr 2022 09:47:01 -0600 [thread overview] Message-ID: <20220407154717.7695-6-logang@deltatee.com> (raw) In-Reply-To: <20220407154717.7695-1-logang@deltatee.com> Add EREMOTEIO error return to dma_map_sgtable() which will be used by .map_sg() implementations that detect P2PDMA pages that the underlying DMA device cannot access. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> --- kernel/dma/mapping.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index db7244291b74..9f65d1041638 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -197,7 +197,7 @@ static int __dma_map_sg_attrs(struct device *dev, struct scatterlist *sg, if (ents > 0) debug_dma_map_sg(dev, sg, nents, ents, dir, attrs); else if (WARN_ON_ONCE(ents != -EINVAL && ents != -ENOMEM && - ents != -EIO)) + ents != -EIO && ents != -EREMOTEIO)) return -EIO; return ents; @@ -255,6 +255,8 @@ EXPORT_SYMBOL(dma_map_sg_attrs); * complete the mapping. Should succeed if retried later. * -EIO Legacy error code with an unknown meaning. eg. this is * returned if a lower level call returned DMA_MAPPING_ERROR. + * -EREMOTEIO The DMA device cannot access P2PDMA memory specified in + * the sg_table. This will not succeed if retried. */ int dma_map_sgtable(struct device *dev, struct sg_table *sgt, enum dma_data_direction dir, unsigned long attrs) -- 2.30.2 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2022-04-07 17:27 UTC|newest] Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-04-07 15:46 [PATCH v6 00/21] Userspace P2PDMA with O_DIRECT NVMe devices Logan Gunthorpe 2022-04-07 15:46 ` Logan Gunthorpe 2022-04-07 15:46 ` [PATCH v6 01/21] lib/scatterlist: add flag for indicating P2PDMA segments in an SGL Logan Gunthorpe 2022-04-07 15:46 ` Logan Gunthorpe 2022-04-07 15:46 ` [PATCH v6 02/21] PCI/P2PDMA: Attempt to set map_type if it has not been set Logan Gunthorpe 2022-04-07 15:46 ` Logan Gunthorpe 2022-04-07 15:46 ` [PATCH v6 03/21] PCI/P2PDMA: Expose pci_p2pdma_map_type() Logan Gunthorpe 2022-04-07 15:46 ` Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 04/21] PCI/P2PDMA: Introduce helpers for dma_map_sg implementations Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe [this message] 2022-04-07 15:47 ` [PATCH v6 05/21] dma-mapping: allow EREMOTEIO return code for P2PDMA transfers Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 06/21] dma-direct: support PCI P2PDMA pages in dma-direct map_sg Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 07/21] dma-mapping: add flags to dma_map_ops to indicate PCI P2PDMA support Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 08/21] iommu/dma: support PCI P2PDMA pages in dma-iommu map_sg Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 09/21] nvme-pci: check DMA ops when indicating support for PCI P2PDMA Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 10/21] nvme-pci: convert to using dma_map_sgtable() Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 11/21] RDMA/core: introduce ib_dma_pci_p2p_dma_supported() Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 12/21] RDMA/rw: drop pci_p2pdma_[un]map_sg() Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 13/21] PCI/P2PDMA: Remove pci_p2pdma_[un]map_sg() Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 14/21] mm: introduce FOLL_PCI_P2PDMA to gate getting PCI P2PDMA pages Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 15/21] iov_iter: introduce iov_iter_get_pages_[alloc_]flags() Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 16/21] block: add check when merging zone device pages Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 17/21] lib/scatterlist: " Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 18/21] block: set FOLL_PCI_P2PDMA in __bio_iov_iter_get_pages() Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 19/21] block: set FOLL_PCI_P2PDMA in bio_map_user_iov() Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 20/21] PCI/P2PDMA: Introduce pci_mmap_p2pmem() Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-05-27 12:55 ` Jason Gunthorpe 2022-05-27 12:55 ` Jason Gunthorpe 2022-05-27 15:35 ` Logan Gunthorpe 2022-05-27 15:35 ` Logan Gunthorpe 2022-05-27 19:03 ` Jason Gunthorpe 2022-05-27 19:03 ` Jason Gunthorpe 2022-05-27 22:41 ` Logan Gunthorpe 2022-05-27 22:41 ` Logan Gunthorpe 2022-06-02 0:00 ` Jason Gunthorpe 2022-06-02 0:00 ` Jason Gunthorpe 2022-06-02 16:16 ` Logan Gunthorpe 2022-06-02 16:16 ` Logan Gunthorpe 2022-06-02 16:30 ` Jason Gunthorpe 2022-06-02 16:30 ` Jason Gunthorpe 2022-06-02 16:45 ` Logan Gunthorpe 2022-06-02 16:45 ` Logan Gunthorpe 2022-06-02 17:18 ` Jason Gunthorpe 2022-06-02 17:18 ` Jason Gunthorpe 2022-06-02 16:49 ` Logan Gunthorpe 2022-06-02 16:49 ` Logan Gunthorpe 2022-06-02 17:28 ` Jason Gunthorpe 2022-06-02 17:28 ` Jason Gunthorpe 2022-06-02 17:49 ` Logan Gunthorpe 2022-06-02 17:49 ` Logan Gunthorpe 2022-04-07 15:47 ` [PATCH v6 21/21] nvme-pci: allow mmaping the CMB in userspace Logan Gunthorpe 2022-04-07 15:47 ` Logan Gunthorpe 2022-05-16 22:31 ` [PATCH v6 00/21] Userspace P2PDMA with O_DIRECT NVMe devices Chaitanya Kulkarni 2022-05-16 22:31 ` Chaitanya Kulkarni via iommu 2022-05-16 22:35 ` Logan Gunthorpe 2022-05-16 22:35 ` Logan Gunthorpe
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