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PCI: endpoint: Add support to link a physical function to a virtual function

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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: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
This commit is contained in:
Kishon Vijay Abraham I 2021-08-19 18:03:38 +05:30 committed by Lorenzo Pieralisi
parent 1cf362e907
commit 101600e790
1 changed files with 24 additions and 0 deletions
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24
drivers/pci/endpoint/pci-ep-cfs.c
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@ -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,
};