summaryrefslogtreecommitdiff
path: root/Documentation/PCI
diff options
context:
space:
mode:
authorKishon Vijay Abraham I <kishon@ti.com>2021-02-02 01:27:59 +0530
committerBjorn Helgaas <bhelgaas@google.com>2021-02-23 14:10:59 -0600
commite85a2d7837622bd99c96f5bbc7f972da90c285a2 (patch)
treec74c12532bbbd0a6eda4d7bc2b51502fdc648657 /Documentation/PCI
parent63840ff5322373d665b2b9c59cd64233d5f0691e (diff)
PCI: endpoint: Add support in configfs to associate two EPCs with EPF
Now that PCI endpoint core supports to add secondary endpoint controller (EPC) with endpoint function (EPF), Add support in configfs to associate two EPCs with EPF. This creates "primary" and "secondary" directory inside the directory created by users for EPF device. Users have to add a symlink of endpoint controller (pci_ep/controllers/) to "primary" or "secondary" directory to bind EPF to primary and secondary EPF interfaces respectively. Existing method of linking directory representing EPF device to directory representing EPC device to associate a single EPC device with a EPF device will continue to work. Link: https://lore.kernel.org/r/20210201195809.7342-8-kishon@ti.com Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'Documentation/PCI')
-rw-r--r--Documentation/PCI/endpoint/pci-endpoint-cfs.rst10
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/PCI/endpoint/pci-endpoint-cfs.rst b/Documentation/PCI/endpoint/pci-endpoint-cfs.rst
index 1bbd81ed06c8..696f8eeb4738 100644
--- a/Documentation/PCI/endpoint/pci-endpoint-cfs.rst
+++ b/Documentation/PCI/endpoint/pci-endpoint-cfs.rst
@@ -68,6 +68,16 @@ created)
... subsys_vendor_id
... subsys_id
... interrupt_pin
+ ... primary/
+ ... <Symlink EPC Device1>/
+ ... secondary/
+ ... <Symlink EPC Device2>/
+
+If an EPF device has to be associated with 2 EPCs (like in the case of
+Non-transparent bridge), symlink of endpoint controller connected to primary
+interface should be added in 'primary' directory and symlink of endpoint
+controller connected to secondary interface should be added in 'secondary'
+directory.
EPC Device
==========