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Message-ID: <20190724063229.GA1804@lst.de>
Date: Wed, 24 Jul 2019 08:32:29 +0200
From: Christoph Hellwig <hch@....de>
To: Logan Gunthorpe <logang@...tatee.com>
Cc: linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
linux-nvme@...ts.infradead.org, linux-rdma@...r.kernel.org,
Bjorn Helgaas <bhelgaas@...gle.com>,
Christoph Hellwig <hch@....de>,
Christian Koenig <Christian.Koenig@....com>,
Jason Gunthorpe <jgg@...lanox.com>,
Sagi Grimberg <sagi@...mberg.me>,
Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...com>,
Dan Williams <dan.j.williams@...el.com>,
Eric Pilmore <epilmore@...aio.com>,
Stephen Bates <sbates@...thlin.com>
Subject: Re: [PATCH 07/14] PCI/P2PDMA: Add the provider's pci_dev to the
dev_pgmap struct
On Mon, Jul 22, 2019 at 05:08:52PM -0600, Logan Gunthorpe wrote:
> diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c
> index 143e11d2a5c3..70c262b7c731 100644
> --- a/drivers/pci/p2pdma.c
> +++ b/drivers/pci/p2pdma.c
> @@ -168,6 +168,7 @@ int pci_p2pdma_add_resource(struct pci_dev *pdev, int bar, size_t size,
> pgmap->res.end = pgmap->res.start + size - 1;
> pgmap->res.flags = pci_resource_flags(pdev, bar);
> pgmap->type = MEMORY_DEVICE_PCI_P2PDMA;
> + pgmap->pci_p2pdma_provider = pdev;
> pgmap->pci_p2pdma_bus_offset = pci_bus_address(pdev, bar) -
> pci_resource_start(pdev, bar);
I think we need to bite the bullet and move the PCIe P2P specific
information out of struct dev_pagemap and into a pci-specific structure
that embedds struct dev_pagemap.
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