From: Leon Romanovsky <leon@kernel.org>
To: Jens Axboe <axboe@kernel.dk>, Jason Gunthorpe <jgg@ziepe.ca>,
Robin Murphy <robin.murphy@arm.com>,
Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Keith Busch <kbusch@kernel.org>, Christoph Hellwig <hch@lst.de>,
"Zeng, Oak" <oak.zeng@intel.com>,
Chaitanya Kulkarni <kch@nvidia.com>
Cc: "Leon Romanovsky" <leonro@nvidia.com>,
"Sagi Grimberg" <sagi@grimberg.me>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Logan Gunthorpe" <logang@deltatee.com>,
"Yishai Hadas" <yishaih@nvidia.com>,
"Shameer Kolothum" <shameerali.kolothum.thodi@huawei.com>,
"Kevin Tian" <kevin.tian@intel.com>,
"Alex Williamson" <alex.williamson@redhat.com>,
"Marek Szyprowski" <m.szyprowski@samsung.com>,
"Jérôme Glisse" <jglisse@redhat.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-rdma@vger.kernel.org, iommu@lists.linux.dev,
linux-nvme@lists.infradead.org, linux-pci@vger.kernel.org,
kvm@vger.kernel.org, linux-mm@kvack.org
Subject: [RFC v2 21/21] nvme-pci: don't allow mapping of bvecs with offset
Date: Thu, 12 Sep 2024 14:15:56 +0300 [thread overview]
Message-ID: <63cdbb87e1b08464705fa343b65e561eb3abd5f9.1726138681.git.leon@kernel.org> (raw)
In-Reply-To: <cover.1726138681.git.leon@kernel.org>
From: Leon Romanovsky <leonro@nvidia.com>
It is a hack, but direct DMA works now.
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
drivers/nvme/host/pci.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 881cbf2c0cac..1872fa91ac76 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -791,6 +791,9 @@ static blk_status_t nvme_map_data(struct nvme_dev *dev, struct request *req,
return BLK_STS_RESOURCE;
rq_for_each_bvec(bv, req, iter) {
+ if (bv.bv_offset != 0)
+ goto out_free;
+
dma_addr = dma_map_bvec(dev->dev, &bv, rq_dma_dir(req), 0);
if (dma_mapping_error(dev->dev, dma_addr))
goto out_free;
--
2.46.0
prev parent reply other threads:[~2024-09-12 11:17 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-12 11:15 [RFC v2 00/21] Provide a new two step DMA API mapping API Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 01/21] iommu/dma: Provide an interface to allow preallocate IOVA Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 02/21] iommu/dma: Implement link/unlink ranges callbacks Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 03/21] iommu/dma: Add check if IOVA can be used Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 04/21] dma-mapping: initialize IOVA state struct Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 05/21] dma-mapping: provide an interface to allocate IOVA Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 06/21] dma-mapping: set and query DMA IOVA state Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 07/21] dma-mapping: implement link range API Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 08/21] mm/hmm: let users to tag specific PFN with DMA mapped bit Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 09/21] dma-mapping: provide callbacks to link/unlink HMM PFNs to specific IOVA Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 10/21] RDMA/umem: Preallocate and cache IOVA for UMEM ODP Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 11/21] RDMA/umem: Store ODP access mask information in PFN Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 12/21] RDMA/core: Separate DMA mapping to caching IOVA and page linkage Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 13/21] RDMA/umem: Prevent UMEM ODP creation with SWIOTLB Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 14/21] vfio/mlx5: Explicitly use number of pages instead of allocated length Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 15/21] vfio/mlx5: Rewrite create mkey flow to allow better code reuse Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 16/21] vfio/mlx5: Explicitly store page list Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 17/21] vfio/mlx5: Convert vfio to use DMA link API Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 18/21] nvme-pci: remove optimizations for single DMA entry Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 19/21] nvme-pci: precalculate number of DMA entries for each command Leon Romanovsky
2024-09-12 11:15 ` [RFC v2 20/21] nvme-pci: use new dma API Leon Romanovsky
2024-09-12 11:15 ` Leon Romanovsky [this message]
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