From: Christoph Hellwig <hch@lst.de>
To: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Zhu Yanjun <yanjunz@nvidia.com>,
Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>,
linux-rdma@vger.kernel.org, linux-pci@vger.kernel.org,
Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>,
iommu@lists.linux-foundation.org,
Bjorn Helgaas <bhelgaas@google.com>,
Bernard Metzler <bmt@zurich.ibm.com>,
Logan Gunthorpe <logang@deltatee.com>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH 4/6] PCI/P2PDMA: Remove the DMA_VIRT_OPS hacks
Date: Thu, 5 Nov 2020 18:43:06 +0100 [thread overview]
Message-ID: <20201105174306.GA10757@lst.de> (raw)
In-Reply-To: <20201105173930.GF36674@ziepe.ca>
On Thu, Nov 05, 2020 at 01:39:30PM -0400, Jason Gunthorpe wrote:
> Hmm. This works for real devices like mlx5, but it means the three SW
> devices will also resolve to a real PCI device that is not the DMA
> device.
Does it? When I followed the links on my system rxe was a virtual
device without a physical parent. Weird.
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WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Christoph Hellwig <hch@lst.de>,
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: Re: [PATCH 4/6] PCI/P2PDMA: Remove the DMA_VIRT_OPS hacks
Date: Thu, 5 Nov 2020 18:43:06 +0100 [thread overview]
Message-ID: <20201105174306.GA10757@lst.de> (raw)
In-Reply-To: <20201105173930.GF36674@ziepe.ca>
On Thu, Nov 05, 2020 at 01:39:30PM -0400, Jason Gunthorpe wrote:
> Hmm. This works for real devices like mlx5, but it means the three SW
> devices will also resolve to a real PCI device that is not the DMA
> device.
Does it? When I followed the links on my system rxe was a virtual
device without a physical parent. Weird.
next prev parent reply other threads:[~2020-11-05 17:43 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-05 7:41 remove dma_virt_ops v2 Christoph Hellwig
2020-11-05 7:41 ` Christoph Hellwig
2020-11-05 7:42 ` [PATCH 1/6] RMDA/sw: don't allow drivers using dma_virt_ops on highmem configs Christoph Hellwig
2020-11-05 7:42 ` Christoph Hellwig
2020-11-05 12:15 ` Robin Murphy
2020-11-05 12:15 ` Robin Murphy
2020-11-05 17:00 ` Christoph Hellwig
2020-11-05 17:00 ` Christoph Hellwig
2020-11-05 14:41 ` Jason Gunthorpe
2020-11-05 14:41 ` Jason Gunthorpe
2020-11-05 15:29 ` Robin Murphy
2020-11-05 15:29 ` Robin Murphy
2020-11-05 17:03 ` Christoph Hellwig
2020-11-05 17:03 ` Christoph Hellwig
2020-11-05 20:32 ` Bernard Metzler
2020-11-05 20:32 ` Bernard Metzler
2020-11-05 7:42 ` [PATCH 2/6] RDMA/core: remove ib_dma_{alloc,free}_coherent Christoph Hellwig
2020-11-05 7:42 ` Christoph Hellwig
2020-11-05 7:42 ` [PATCH 3/6] RDMA/core: remove use of dma_virt_ops Christoph Hellwig
2020-11-05 7:42 ` Christoph Hellwig
2020-11-05 14:34 ` Jason Gunthorpe
2020-11-05 14:34 ` Jason Gunthorpe
2020-11-05 17:09 ` Christoph Hellwig
2020-11-05 17:09 ` Christoph Hellwig
2020-11-05 17:52 ` Jason Gunthorpe
2020-11-05 17:52 ` Jason Gunthorpe
2020-11-05 17:58 ` Jason Gunthorpe
2020-11-05 17:58 ` Jason Gunthorpe
2020-11-06 14:18 ` Christoph Hellwig
2020-11-06 14:18 ` Christoph Hellwig
2020-11-06 10:01 ` Christoph Hellwig
2020-11-06 10:01 ` Christoph Hellwig
2020-11-05 7:42 ` [PATCH 4/6] PCI/P2PDMA: Remove the DMA_VIRT_OPS hacks Christoph Hellwig
2020-11-05 7:42 ` Christoph Hellwig
2020-11-05 14:34 ` Jason Gunthorpe
2020-11-05 14:34 ` Jason Gunthorpe
2020-11-05 17:08 ` Christoph Hellwig
2020-11-05 17:08 ` Christoph Hellwig
2020-11-05 17:23 ` Jason Gunthorpe
2020-11-05 17:23 ` Jason Gunthorpe
2020-11-05 17:29 ` Christoph Hellwig
2020-11-05 17:29 ` Christoph Hellwig
2020-11-05 17:39 ` Jason Gunthorpe
2020-11-05 17:39 ` Jason Gunthorpe
2020-11-05 17:43 ` Christoph Hellwig [this message]
2020-11-05 17:43 ` Christoph Hellwig
2020-11-05 17:56 ` Jason Gunthorpe
2020-11-05 17:56 ` Jason Gunthorpe
2020-11-05 7:42 ` [PATCH 5/6] PCI/P2PDMA: Cleanup __pci_p2pdma_map_sg a bit Christoph Hellwig
2020-11-05 7:42 ` Christoph Hellwig
2020-11-05 7:42 ` [PATCH 6/6] dma-mapping: remove dma_virt_ops Christoph Hellwig
2020-11-05 7:42 ` Christoph Hellwig
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