On 2/24/2011 5:36 AM, Andrew Morton wrote: > On Mon, 21 Feb 2011 13:50:55 +0530 > Pratyush Anand <pratyush.anand@xxxxxx> wrote: > >> This is a configurable gadget. can be configured by configfs interface. Any >> IP available at PCIE bus can be programmed to be used by host >> controller.It supoorts both INTX and MSI. >> By default, gadget is configured for INTX and SYSRAM1 is mapped to BAR0 >> with size 0x1000 >> >> Changes since V4: >> - All documentation related comments incorporated >> >> Changes since V3: >> - support for multiple instances of such device > > ^^ This doesn't seem to agree with the documentation. > Will add a line in documentation for it. >> ... >> >> --- /dev/null >> +++ b/Documentation/ABI/testing/configfs-spear-pcie-gadget >> @@ -0,0 +1,30 @@ >> +What: /config/pcie-gadget >> +Date: Feb 2011 >> +KernelVersion: 2.6.37 >> +Contact: Pratyush Anand <pratyush.anand@xxxxxx> >> +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/ >> + >> + /config/pcie-gadget/ >> + 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. > > What's the configfs naming scheme for the second and later devices? > there would be pcie-gadget.n directory under /config for nth PCIe Device Controller. Regards Pratyush > > . > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
