Commit 101600e7 authored by Kishon Vijay Abraham I's avatar Kishon Vijay Abraham I Committed by Lorenzo Pieralisi
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PCI: endpoint: Add support to link a physical function to a virtual function 

While the physical function has to be linked to endpoint controller, the
virtual function has to be linked to a physical function. Add support to
link a physical function to a virtual function in pci-ep-cfs.

Link: https://lore.kernel.org/r/20210819123343.1951-4-kishon@ti.com


Signed-off-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
parent 1cf362e9

drivers/pci/endpoint/pci-ep-cfs.c

+24 −0
Original line number Diff line number Diff line
@@ -475,6 +475,28 @@ static struct configfs_attribute *pci_epf_attrs[] = { 
	NULL,

};



static int pci_epf_vepf_link(struct config_item *epf_pf_item,

			     struct config_item *epf_vf_item)

{

	struct pci_epf_group *epf_vf_group = to_pci_epf_group(epf_vf_item);

	struct pci_epf_group *epf_pf_group = to_pci_epf_group(epf_pf_item);

	struct pci_epf *epf_pf = epf_pf_group->epf;

	struct pci_epf *epf_vf = epf_vf_group->epf;



	return pci_epf_add_vepf(epf_pf, epf_vf);

}



static void pci_epf_vepf_unlink(struct config_item *epf_pf_item,

				struct config_item *epf_vf_item)

{

	struct pci_epf_group *epf_vf_group = to_pci_epf_group(epf_vf_item);

	struct pci_epf_group *epf_pf_group = to_pci_epf_group(epf_pf_item);

	struct pci_epf *epf_pf = epf_pf_group->epf;

	struct pci_epf *epf_vf = epf_vf_group->epf;



	pci_epf_remove_vepf(epf_pf, epf_vf);

}



static void pci_epf_release(struct config_item *item)

{

	struct pci_epf_group *epf_group = to_pci_epf_group(item);
@@ -487,6 +509,8 @@ static void pci_epf_release(struct config_item *item) 
}



static struct configfs_item_operations pci_epf_ops = {

	.allow_link		= pci_epf_vepf_link,

	.drop_link		= pci_epf_vepf_unlink,

	.release		= pci_epf_release,

};