diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index bda151788f3f..188ea94cfe2e 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -123,6 +123,20 @@ config PCI_PASID
 
 	  If unsure, say N.
 
+config PCI_P2P
+	bool "PCI Peer to Peer transfer support"
+	depends on ZONE_DEVICE
+	select GENERIC_ALLOCATOR
+	help
+	  Enableѕ drivers to do PCI peer to peer transactions to and from
+	  bars that are exposed to other devices in the same domain.
+
+	  Many PCIe root complexes do not support P2P transactions and
+	  it's hard to tell which support it with good performance, so
+	  at this time you will need a PCIe switch.
+
+	  If unsure, say N.
+
 config PCI_LABEL
 	def_bool y if (DMI || ACPI)
 	select NLS
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index c7819b973df7..749858201400 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_PCI_MSI) += msi.o
 
 obj-$(CONFIG_PCI_ATS) += ats.o
 obj-$(CONFIG_PCI_IOV) += iov.o
+obj-$(CONFIG_PCI_P2P) += p2p.o
 
 #
 # ACPI Related PCI FW Functions
diff --git a/drivers/pci/p2p.c b/drivers/pci/p2p.c
new file mode 100644
index 000000000000..aa465ac9273d
--- /dev/null
+++ b/drivers/pci/p2p.c
@@ -0,0 +1,549 @@
+/*
+ * Peer 2 Peer Memory support.
+ *
+ * Copyright (c) 2016-2017, Microsemi Corporation
+ * Copyright (c) 2017, Christoph Hellwig.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/pci-p2p.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/genalloc.h>
+#include <linux/memremap.h>
+#include <linux/percpu-refcount.h>
+
+struct pci_p2p {
+	struct percpu_ref devmap_ref;
+	struct completion devmap_ref_done;
+	struct gen_pool *pool;
+	bool published;
+};
+
+static void pci_p2pmem_percpu_release(struct percpu_ref *ref)
+{
+	struct pci_p2p *p2p =
+		container_of(ref, struct pci_p2p, devmap_ref);
+
+	complete_all(&p2p->devmap_ref_done);
+}
+
+static void pci_p2pmem_percpu_kill(void *data)
+{
+	struct percpu_ref *ref = data;
+
+	if (percpu_ref_is_dying(ref))
+		return;
+
+	percpu_ref_kill(ref);
+}
+
+static void pci_p2pmem_release(void *data)
+{
+	struct pci_dev *pdev = data;
+
+	wait_for_completion(&pdev->p2p->devmap_ref_done);
+	percpu_ref_exit(&pdev->p2p->devmap_ref);
+
+	gen_pool_destroy(pdev->p2p->pool);
+	pdev->p2p = NULL;
+}
+
+static int pci_p2pmem_setup(struct pci_dev *pdev)
+{
+	int error = -ENOMEM;
+	struct pci_p2p *p2p;
+
+	p2p = devm_kzalloc(&pdev->dev, sizeof(*p2p), GFP_KERNEL);
+	if (!p2p)
+		return -ENOMEM;
+
+	p2p->pool = gen_pool_create(PAGE_SHIFT, dev_to_node(&pdev->dev));
+	if (!p2p->pool)
+		goto out;
+
+	init_completion(&p2p->devmap_ref_done);
+	error = percpu_ref_init(&p2p->devmap_ref,
+			pci_p2pmem_percpu_release, 0, GFP_KERNEL);
+	if (error)
+		goto out_pool_destroy;
+
+	percpu_ref_switch_to_atomic_sync(&p2p->devmap_ref);
+
+	error = devm_add_action_or_reset(&pdev->dev, pci_p2pmem_release, pdev);
+	if (error)
+		goto out_pool_destroy;
+
+	pdev->p2p = p2p;
+
+	return 0;
+
+out_pool_destroy:
+	gen_pool_destroy(p2p->pool);
+out:
+	devm_kfree(&pdev->dev, p2p);
+	return error;
+}
+
+/**
+ * pci_p2pmem_add_resource - add memory for use as p2p memory
+ * @pci: the device to add the memory to
+ * @bar: PCI bar to add
+ * @size: size of the memory to add, may be zero to use the whole bar
+ * @offset: offset into the PCI bar
+ *
+ * The memory will be given ZONE_DEVICE struct pages so that it may
+ * be used with any dma request.
+ */
+int pci_p2pmem_add_resource(struct pci_dev *pdev, int bar, size_t size,
+			    u64 offset)
+{
+	struct dev_pagemap *pgmap;
+	void *addr;
+	int error;
+
+	if (WARN_ON(offset >= pci_resource_len(pdev, bar)))
+		return -EINVAL;
+
+	if (!size)
+		size = pci_resource_len(pdev, bar) - offset;
+
+	if (WARN_ON(size + offset > pci_resource_len(pdev, bar)))
+		return -EINVAL;
+
+	if (!pdev->p2p) {
+		error = pci_p2pmem_setup(pdev);
+		if (error)
+			return error;
+	}
+
+	pgmap = devm_kzalloc(&pdev->dev, sizeof(*pgmap), GFP_KERNEL);
+	if (!pgmap)
+		return -ENOMEM;
+
+	pgmap->res.start = pci_resource_start(pdev, bar) + offset;
+	pgmap->res.end = pgmap->res.start + size - 1;
+	pgmap->ref = &pdev->p2p->devmap_ref;
+	pgmap->type = MEMORY_DEVICE_PCI_P2P;
+
+	addr = devm_memremap_pages(&pdev->dev, pgmap);
+	if (IS_ERR(addr))
+		return PTR_ERR(addr);
+
+	error = gen_pool_add_virt(pdev->p2p->pool, (uintptr_t)addr,
+			pci_bus_address(pdev, bar) + offset,
+			resource_size(&pgmap->res), dev_to_node(&pdev->dev));
+	if (error)
+		return error;
+
+	error = devm_add_action_or_reset(&pdev->dev, pci_p2pmem_percpu_kill,
+					  &pdev->p2p->devmap_ref);
+	if (error)
+		return error;
+
+	dev_info(&pdev->dev, "added %zdB of p2p memory\n", size);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(pci_p2pmem_add_resource);
+
+static struct pci_dev *find_parent_pci_dev(struct device *dev)
+{
+	struct device *parent;
+
+	dev = get_device(dev);
+
+	while (dev) {
+		if (dev_is_pci(dev))
+			return to_pci_dev(dev);
+
+		parent = get_device(dev->parent);
+		put_device(dev);
+		dev = parent;
+	}
+
+	return NULL;
+}
+
+/*
+ * If a device is behind a switch, we try to find the upstream bridge
+ * port of the switch. This requires two calls to pci_upstream_bridge:
+ * one for the upstream port on the switch, one on the upstream port
+ * for the next level in the hierarchy. Because of this, devices connected
+ * to the root port will be rejected.
+ */
+static struct pci_dev *get_upstream_switch_port(struct pci_dev *pdev)
+{
+	struct pci_dev *up1, *up2;
+
+	if (!pdev)
+		return NULL;
+
+	up1 = pci_dev_get(pci_upstream_bridge(pdev));
+	if (!up1)
+		return NULL;
+
+	up2 = pci_dev_get(pci_upstream_bridge(up1));
+	pci_dev_put(up1);
+
+	return up2;
+}
+
+static bool __upstream_bridges_match(struct pci_dev *upstream,
+				     struct pci_dev *client)
+{
+	struct pci_dev *dma_up;
+	bool ret = true;
+
+	dma_up = get_upstream_switch_port(client);
+
+	if (!dma_up) {
+		dev_dbg(&client->dev, "not a pci device behind a switch\n");
+		ret = false;
+		goto out;
+	}
+
+	if (upstream != dma_up) {
+		dev_dbg(&client->dev,
+			"does not reside on the same upstream bridge\n");
+		ret = false;
+		goto out;
+	}
+
+out:
+	pci_dev_put(dma_up);
+	return ret;
+}
+
+static bool upstream_bridges_match(struct pci_dev *pdev,
+				   struct pci_dev *client)
+{
+	struct pci_dev *upstream;
+	bool ret;
+
+	upstream = get_upstream_switch_port(pdev);
+	if (!upstream) {
+		dev_warn(&pdev->dev, "not behind a pci switch\n");
+		return false;
+	}
+
+	ret = __upstream_bridges_match(upstream, client);
+
+	pci_dev_put(upstream);
+
+	return ret;
+}
+
+struct pci_p2pmem_client {
+	struct list_head list;
+	struct pci_dev *client;
+	struct pci_dev *p2pmem;
+};
+
+/**
+ * pci_p2pmem_add_client - allocate a new element in a client device list
+ * @head: list head of p2pmem clients
+ * @dev: device to add to the list
+ *
+ * This adds @dev to a list of clients used by a p2pmem device.
+ * This list should be passed to p2pmem_find(). Once p2pmem_find() has
+ * been called successfully, the list will be bound to a specific p2pmem
+ * device and new clients can only be added to the list if they are
+ * supported by that p2pmem device.
+ *
+ * The caller is expected to have a lock which protects @head as necessary
+ * so that none of the pci_p2pmem functions can be called concurrently
+ * on that list.
+ *
+ * Returns 0 if the client was successfully added.
+ */
+int pci_p2pmem_add_client(struct list_head *head, struct device *dev)
+{
+	struct pci_p2pmem_client *item, *new_item;
+	struct pci_dev *p2pmem = NULL;
+	struct pci_dev *client;
+	int ret;
+
+	client = find_parent_pci_dev(dev);
+	if (!client) {
+		dev_warn(dev,
+			 "cannot be used for p2p as it is not a pci device\n");
+		return -ENODEV;
+	}
+
+	item = list_first_entry_or_null(head, struct pci_p2pmem_client, list);
+	if (item && item->p2pmem) {
+		p2pmem = item->p2pmem;
+
+		if (!upstream_bridges_match(p2pmem, client)) {
+			ret = -EXDEV;
+			goto put_client;
+		}
+	}
+
+	new_item = kzalloc(sizeof(*new_item), GFP_KERNEL);
+	if (!new_item) {
+		ret = -ENOMEM;
+		goto put_client;
+	}
+
+	new_item->client = client;
+	new_item->p2pmem = pci_dev_get(p2pmem);
+
+	list_add_tail(&new_item->list, head);
+
+	return 0;
+
+put_client:
+	pci_dev_put(client);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(pci_p2pmem_add_client);
+
+static void pci_p2pmem_client_free(struct pci_p2pmem_client *item)
+{
+	list_del(&item->list);
+	pci_dev_put(item->client);
+	pci_dev_put(item->p2pmem);
+	kfree(item);
+}
+
+/**
+ * pci_p2pmem_remove_client - remove and free a new p2pmem client
+ * @head: list head of p2pmem clients
+ * @dev: device to remove from the list
+ *
+ * This removes @dev from a list of clients used by a p2pmem device.
+ * The caller is expected to have a lock which protects @head as necessary
+ * so that none of the pci_p2pmem functions can be called concurrently
+ * on that list.
+ */
+void pci_p2pmem_remove_client(struct list_head *head, struct device *dev)
+{
+	struct pci_p2pmem_client *pos, *tmp;
+	struct pci_dev *pdev;
+
+	pdev = find_parent_pci_dev(dev);
+	if (!pdev)
+		return;
+
+	list_for_each_entry_safe(pos, tmp, head, list) {
+		if (pos->client != pdev)
+			continue;
+
+		pci_p2pmem_client_free(pos);
+	}
+
+	pci_dev_put(pdev);
+}
+EXPORT_SYMBOL_GPL(pci_p2pmem_remove_client);
+
+/**
+ * pci_p2pmem_client_list_free - free an entire list of p2pmem clients
+ * @head: list head of p2pmem clients
+ *
+ * This removes all devices in a list of clients used by a p2pmem device.
+ * The caller is expected to have a lock which protects @head as necessary
+ * so that none of the pci_p2pmem functions can be called concurrently
+ * on that list.
+ */
+void pci_p2pmem_client_list_free(struct list_head *head)
+{
+	struct pci_p2pmem_client *pos, *tmp;
+
+	list_for_each_entry_safe(pos, tmp, head, list)
+		pci_p2pmem_client_free(pos);
+}
+EXPORT_SYMBOL_GPL(pci_p2pmem_client_list_free);
+
+static bool upstream_bridges_match_list(struct pci_dev *pdev,
+					struct list_head *head)
+{
+	struct pci_p2pmem_client *pos;
+	struct pci_dev *upstream;
+	bool ret;
+
+	upstream = get_upstream_switch_port(pdev);
+	if (!upstream) {
+		dev_warn(&pdev->dev, "not behind a pci switch\n");
+		return false;
+	}
+
+	list_for_each_entry(pos, head, list) {
+		ret = __upstream_bridges_match(upstream, pos->client);
+		if (!ret)
+			break;
+	}
+
+	pci_dev_put(upstream);
+	return ret;
+}
+
+/**
+ * pci_p2pmem_find - find a p2p mem device compatible with the specified device
+ * @dev: list of device to check (NULL-terminated)
+ *
+ * For now, we only support cases where the devices that will transfer to the
+ * p2pmem device are on the same switch.  This cuts out cases that may work but
+ * is safest for the user.
+ *
+ * Returns a pointer to the PCI device with a reference taken (use pci_dev_put
+ * to return the reference) or NULL if no compatible device is found.
+ */
+struct pci_dev *pci_p2pmem_find(struct list_head *clients)
+{
+	struct pci_dev *pdev = NULL;
+	struct pci_p2pmem_client *pos;
+
+	while ((pdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pdev))) {
+		if (!pdev->p2p || !pdev->p2p->published)
+			continue;
+
+		if (!upstream_bridges_match_list(pdev, clients))
+			continue;
+
+		list_for_each_entry(pos, clients, list)
+			pos->p2pmem = pdev;
+
+		return pdev;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(pci_p2pmem_find);
+
+/**
+ * pci_alloc_p2p_mem - allocate p2p memory
+ * @pdev:	the device to allocate memory from
+ * @size:	number of bytes to allocate
+ *
+ * Returns the allocated memory or NULL on error.
+ */
+void *pci_alloc_p2pmem(struct pci_dev *pdev, size_t size)
+{
+	void *ret;
+
+	if (unlikely(!pdev->p2p))
+		return NULL;
+
+	if (unlikely(!percpu_ref_tryget_live(&pdev->p2p->devmap_ref)))
+		return NULL;
+
+	ret = (void *)(uintptr_t)gen_pool_alloc(pdev->p2p->pool, size);
+
+	if (unlikely(!ret))
+		percpu_ref_put(&pdev->p2p->devmap_ref);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(pci_alloc_p2pmem);
+
+/**
+ * pci_free_p2pmem - allocate p2p memory
+ * @pdev:	the device the memory was allocated from
+ * @addr:	address of the memory that was allocated
+ * @size:	number of bytes that was allocated
+ */
+void pci_free_p2pmem(struct pci_dev *pdev, void *addr, size_t size)
+{
+	gen_pool_free(pdev->p2p->pool, (uintptr_t)addr, size);
+	percpu_ref_put(&pdev->p2p->devmap_ref);
+}
+EXPORT_SYMBOL_GPL(pci_free_p2pmem);
+
+/**
+ * pci_virt_to_bus - return the pci bus address for a given virtual
+ *	address obtained with pci_alloc_p2pmem
+ * @pdev:	the device the memory was allocated from
+ * @addr:	address of the memory that was allocated
+ */
+pci_bus_addr_t pci_p2pmem_virt_to_bus(struct pci_dev *pdev, void *addr)
+{
+	if (!addr)
+		return 0;
+	if (!pdev->p2p)
+		return 0;
+
+	return gen_pool_virt_to_phys(pdev->p2p->pool, (unsigned long)addr);
+}
+EXPORT_SYMBOL_GPL(pci_p2pmem_virt_to_bus);
+
+/**
+ * pci_p2pmem_alloc_sgl - allocate p2p memory in an sgl
+ * @pdev:	the device to allocate memory from
+ * @sgl:	the allocated sgl
+ * @nents:      the number of sgs in the list
+ * @length:     number of bytes to allocate
+ *
+ * Returns 0 on success
+ */
+int pci_p2pmem_alloc_sgl(struct pci_dev *pdev, struct scatterlist **sgl,
+			 unsigned int *nents, u32 length)
+{
+	struct scatterlist *sg;
+	void *addr;
+
+	sg = kzalloc(sizeof(*sg), GFP_KERNEL);
+	if (!sg)
+		return -ENOMEM;
+
+	sg_init_table(sg, 1);
+
+	addr = pci_alloc_p2pmem(pdev, length);
+	if (!addr)
+		goto out_free_sg;
+
+	sg_set_buf(sg, addr, length);
+	*sgl = sg;
+	*nents = 1;
+	return 0;
+
+out_free_sg:
+	kfree(sg);
+	return -ENOMEM;
+}
+EXPORT_SYMBOL_GPL(pci_p2pmem_alloc_sgl);
+
+/**
+ * pci_p2pmem_free_sgl - free an sgl allocated by pci_p2pmem_alloc_sgl
+ * @pdev:	the device to allocate memory from
+ * @sgl:	the allocated sgl
+ * @nents:      the number of sgs in the list
+ */
+void pci_p2pmem_free_sgl(struct pci_dev *pdev, struct scatterlist *sgl,
+			 unsigned int nents)
+{
+	struct scatterlist *sg;
+	int count;
+
+	if (!sgl || !nents)
+		return;
+
+	for_each_sg(sgl, sg, nents, count)
+		pci_free_p2pmem(pdev, sg_virt(sg), sg->length);
+	kfree(sgl);
+}
+EXPORT_SYMBOL_GPL(pci_p2pmem_free_sgl);
+
+/**
+ * pci_p2pmem_publish - publish the p2p memory for use by other devices
+ *	with pci_p2pmem_find
+ * @pdev:	the device with p2p memory to publish
+ * @publish:	set to true to publish the memory, false to unpublish it
+ */
+void pci_p2pmem_publish(struct pci_dev *pdev, bool publish)
+{
+	if (WARN_ON(publish && !pdev->p2p))
+		return;
+
+	pdev->p2p->published = publish;
+}
+EXPORT_SYMBOL_GPL(pci_p2pmem_publish);
diff --git a/include/linux/memremap.h b/include/linux/memremap.h
index 7b4899c06f49..c17a6d167d48 100644
--- a/include/linux/memremap.h
+++ b/include/linux/memremap.h
@@ -53,11 +53,16 @@ struct vmem_altmap {
  * driver can hotplug the device memory using ZONE_DEVICE and with that memory
  * type. Any page of a process can be migrated to such memory. However no one
  * should be allow to pin such memory so that it can always be evicted.
+ *
+ * MEMORY_DEVICE_PCI_P2P:
+ * Device memory residing in a PCI BAR intended for use with Peer-to-Peer
+ * transactions.
  */
 enum memory_type {
 	MEMORY_DEVICE_HOST = 0,
 	MEMORY_DEVICE_PRIVATE,
 	MEMORY_DEVICE_PUBLIC,
+	MEMORY_DEVICE_PCI_P2P,
 };
 
 /*
@@ -161,6 +166,19 @@ static inline void vmem_altmap_free(struct vmem_altmap *altmap,
 }
 #endif /* CONFIG_ZONE_DEVICE */
 
+#ifdef CONFIG_PCI_P2P
+static inline bool is_pci_p2p_page(const struct page *page)
+{
+	return is_zone_device_page(page) &&
+		page->pgmap->type == MEMORY_DEVICE_PCI_P2P;
+}
+#else
+static inline bool is_pci_p2p_page(const struct page *page)
+{
+	return false;
+}
+#endif
+
 #if defined(CONFIG_DEVICE_PRIVATE) || defined(CONFIG_DEVICE_PUBLIC)
 static inline bool is_device_private_page(const struct page *page)
 {
diff --git a/include/linux/pci-p2p.h b/include/linux/pci-p2p.h
new file mode 100644
index 000000000000..f811c97a5886
--- /dev/null
+++ b/include/linux/pci-p2p.h
@@ -0,0 +1,85 @@
+#ifndef _LINUX_PCI_P2P_H
+#define _LINUX_PCI_P2P_H
+/*
+ * Copyright (c) 2016-2017, Microsemi Corporation
+ * Copyright (c) 2017, Christoph Hellwig.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/pci.h>
+
+struct block_device;
+struct scatterlist;
+
+#ifdef CONFIG_PCI_P2P
+int pci_p2pmem_add_resource(struct pci_dev *pdev, int bar, size_t size,
+		u64 offset);
+int pci_p2pmem_add_client(struct list_head *head, struct device *dev);
+void pci_p2pmem_remove_client(struct list_head *head, struct device *dev);
+void pci_p2pmem_client_list_free(struct list_head *head);
+struct pci_dev *pci_p2pmem_find(struct list_head *clients);
+void *pci_alloc_p2pmem(struct pci_dev *pdev, size_t size);
+void pci_free_p2pmem(struct pci_dev *pdev, void *addr, size_t size);
+pci_bus_addr_t pci_p2pmem_virt_to_bus(struct pci_dev *pdev, void *addr);
+int pci_p2pmem_alloc_sgl(struct pci_dev *pdev, struct scatterlist **sgl,
+		unsigned int *nents, u32 length);
+void pci_p2pmem_free_sgl(struct pci_dev *pdev, struct scatterlist *sgl,
+		unsigned int nents);
+void pci_p2pmem_publish(struct pci_dev *pdev, bool publish);
+#else /* CONFIG_PCI_P2P */
+static inline int pci_p2pmem_add_resource(struct pci_dev *pdev, int bar,
+		size_t size, u64 offset)
+{
+	return 0;
+}
+static inline int pci_p2pmem_add_client(struct list_head *head,
+		struct device *dev)
+{
+	return 0;
+}
+static inline void pci_p2pmem_remove_client(struct list_head *head,
+		struct device *dev)
+{
+}
+static inline void pci_p2pmem_client_list_free(struct list_head *head)
+{
+}
+static inline struct pci_dev *pci_p2pmem_find(struct list_head *clients)
+{
+	return NULL;
+}
+static inline void *pci_alloc_p2pmem(struct pci_dev *pdev, size_t size)
+{
+	return NULL;
+}
+static inline void pci_free_p2pmem(struct pci_dev *pdev, void *addr,
+		size_t size)
+{
+}
+static inline pci_bus_addr_t pci_p2pmem_virt_to_bus(struct pci_dev *pdev,
+						    void *addr)
+{
+	return 0;
+}
+static inline int pci_p2pmem_alloc_sgl(struct pci_dev *pdev,
+		struct scatterlist **sgl, unsigned int *nents, u32 length)
+{
+	return -ENODEV;
+}
+static inline void pci_p2pmem_free_sgl(struct pci_dev *pdev,
+		struct scatterlist *sgl, unsigned int nents)
+{
+}
+static inline void pci_p2pmem_publish(struct pci_dev *pdev, bool publish)
+{
+}
+#endif /* CONFIG_PCI_P2P */
+#endif /* _LINUX_PCI_P2P_H */
diff --git a/include/linux/pci.h b/include/linux/pci.h
index c170c9250c8b..047aea679e87 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -279,6 +279,7 @@ struct pcie_link_state;
 struct pci_vpd;
 struct pci_sriov;
 struct pci_ats;
+struct pci_p2p;
 
 /*
  * The pci_dev structure is used to describe PCI devices.
@@ -432,6 +433,9 @@ struct pci_dev {
 #ifdef CONFIG_PCI_PASID
 	u16		pasid_features;
 #endif
+#ifdef CONFIG_PCI_P2P
+	struct pci_p2p *p2p;
+#endif
 	phys_addr_t rom; /* Physical address of ROM if it's not from the BAR */
 	size_t romlen; /* Length of ROM if it's not from the BAR */
 	char *driver_override; /* Driver name to force a match */
