Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / ABI / testing / configfs-spear-pcie-gadget

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+What:          /config/pcie-gadget
+Date:          Feb 2011
+KernelVersion: 2.6.37
+Contact:       Pratyush Anand <pratyush.anand@st.com>
+Description:
+
+       Interface is used to configure selected dual mode PCIe controller
+       as device and then program its various registers to configure it
+       as a particular device type.
+       This interfaces can be used to show spear's PCIe device capability.
+
+       Nodes are only visible when configfs is mounted. To mount configfs
+       in /config directory use:
+       # mount -t configfs none /config/
+
+       For nth PCIe Device Controller
+       /config/pcie-gadget.n/
+               link ... used to enable ltssm and read its status.
+               int_type ...used to configure and read type of supported
+                       interrupt
+               no_of_msi ... used to configure number of MSI vector needed and
+                       to read no of MSI granted.
+               inta ... write 1 to assert INTA and 0 to de-assert.
+               send_msi ... write MSI vector to be sent.
+               vendor_id ... used to write and read vendor id (hex)
+               device_id ... used to write and read device id (hex)
+               bar0_size ... used to write and read bar0_size
+               bar0_address ... used to write and read bar0 mapped area in hex.
+               bar0_rw_offset ... used to write and read offset of bar0 where
+                       bar0_data will be written or read.
+               bar0_data ... used to write and read data at bar0_rw_offset.