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From:   Christoph Hellwig <hch@lst.de>
To:     Jason Gunthorpe <jgg@ziepe.ca>
Cc:     Bjorn Helgaas <bhelgaas@google.com>,
        Bernard Metzler <bmt@zurich.ibm.com>,
        Zhu Yanjun <yanjunz@nvidia.com>,
        Logan Gunthorpe <logang@deltatee.com>,
        Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>,
        Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>,
        linux-rdma@vger.kernel.org, linux-pci@vger.kernel.org,
        iommu@lists.linux-foundation.org
Subject: remove dma_virt_ops v2
Date:   Thu,  5 Nov 2020 08:41:59 +0100
Message-Id: <20201105074205.1690638-1-hch@lst.de>
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Hi Jason,

this series switches the RDMA core to opencode the special case of
devices bypassing the DMA mapping in the RDMA ULPs.  The virt ops
have caused a bit of trouble due to the P2P code node working with
them due to the fact that we'd do two dma mapping iterations for a
single I/O, but also are a bit of layering violation and lead to
more code than necessary.

Tested with nvme-rdma over rxe.

Changes since v1:
 - disable software RDMA drivers for highmem configs
 - update the PCI commit logs