diff options
Diffstat (limited to 'Documentation/PCI/endpoint/pci-endpoint-cfs.rst')
| -rw-r--r-- | Documentation/PCI/endpoint/pci-endpoint-cfs.rst | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/Documentation/PCI/endpoint/pci-endpoint-cfs.rst b/Documentation/PCI/endpoint/pci-endpoint-cfs.rst index 696f8eeb4738..fb73345cfb8a 100644 --- a/Documentation/PCI/endpoint/pci-endpoint-cfs.rst +++ b/Documentation/PCI/endpoint/pci-endpoint-cfs.rst @@ -43,6 +43,7 @@ entries corresponding to EPF driver will be created by the EPF core. .. <EPF Driver1>/ ... <EPF Device 11>/ ... <EPF Device 21>/ + ... <EPF Device 31>/ .. <EPF Driver2>/ ... <EPF Device 12>/ ... <EPF Device 22>/ @@ -68,6 +69,7 @@ created) ... subsys_vendor_id ... subsys_id ... interrupt_pin + ... <Symlink EPF Device 31>/ ... primary/ ... <Symlink EPC Device1>/ ... secondary/ @@ -79,6 +81,13 @@ interface should be added in 'primary' directory and symlink of endpoint controller connected to secondary interface should be added in 'secondary' directory. +The <EPF Device> directory can have a list of symbolic links +(<Symlink EPF Device 31>) to other <EPF Device>. These symbolic links should +be created by the user to represent the virtual functions that are bound to +the physical function. In the above directory structure <EPF Device 11> is a +physical function and <EPF Device 31> is a virtual function. An EPF device once +it's linked to another EPF device, cannot be linked to a EPC device. + EPC Device ========== @@ -98,7 +107,8 @@ entries corresponding to EPC device will be created by the EPC core. The <EPC Device> directory will have a list of symbolic links to <EPF Device>. These symbolic links should be created by the user to -represent the functions present in the endpoint device. +represent the functions present in the endpoint device. Only <EPF Device> +that represents a physical function can be linked to a EPC device. The <EPC Device> directory will also have a *start* field. Once "1" is written to this field, the endpoint device will be ready to @@ -125,4 +135,4 @@ all the EPF devices are created and linked with the EPC device. | interrupt_pin | function -[1] :doc:`pci-endpoint` +[1] Documentation/PCI/endpoint/pci-endpoint.rst |