linux-kernel - [PATCH 07/14] PCI/P2PDMA: Add the provider's pci_dev to the dev

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Message-Id: <20190722230859.5436-8-logang@deltatee.com>
Date:   Mon, 22 Jul 2019 17:08:52 -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 07/14] PCI/P2PDMA: Add the provider's pci_dev to the dev_pgmap 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     | 1 +
 include/linux/memremap.h | 1 +
 2 files changed, 2 insertions(+)

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);
 
diff --git a/include/linux/memremap.h b/include/linux/memremap.h
index f8a5b2a19945..91aee61796bc 100644
--- a/include/linux/memremap.h
+++ b/include/linux/memremap.h
@@ -112,6 +112,7 @@ struct dev_pagemap {
 	struct device *dev;
 	enum memory_type type;
 	unsigned int flags;
+	struct pci_dev *pci_p2pdma_provider;
 	u64 pci_p2pdma_bus_offset;
 	const struct dev_pagemap_ops *ops;
 };
-- 
2.20.1