linux-kernel - [PATCH v2 02/14] PCI/P2PDMA: Add the provider's pci_dev to the pci_p2pdma

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Message-Id: <20190730163545.4915-3-logang@deltatee.com>
Date:   Tue, 30 Jul 2019 10:35:33 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-nvme@...ts.infradead.org, linux-rdma@...r.kernel.org
Cc:     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>,
        Logan Gunthorpe <logang@...tatee.com>
Subject: [PATCH v2 02/14] PCI/P2PDMA: Add the provider's pci_dev to the pci_p2pdma_pagemap struct

The provider will be needed to figure out how to properly map
a device.

Signed-off-by: Logan Gunthorpe <logang@...tatee.com>
---
 drivers/pci/p2pdma.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c
index 03e9c887bdfb..93fbda14f4a9 100644
--- a/drivers/pci/p2pdma.c
+++ b/drivers/pci/p2pdma.c
@@ -27,6 +27,7 @@ struct pci_p2pdma {
 
 struct pci_p2pdma_pagemap {
 	struct dev_pagemap pgmap;
+	struct pci_dev *provider;
 	u64 bus_offset;
 };
 
@@ -178,6 +179,7 @@ int pci_p2pdma_add_resource(struct pci_dev *pdev, int bar, size_t size,
 	pgmap->res.flags = pci_resource_flags(pdev, bar);
 	pgmap->type = MEMORY_DEVICE_PCI_P2PDMA;
 
+	p2p_pgmap->provider = pdev;
 	p2p_pgmap->bus_offset = pci_bus_address(pdev, bar) -
 		pci_resource_start(pdev, bar);
 
-- 
2.20.1