uio: dfl: add vendor-specific feature id

Add a Device Feature List (DFL) feature id as a generic mechanism
to expose a vendor-specific FPGA IP to user space. The feature id
is intended for use with IPs that do not need any kernel services
beyond exposure to user space through the UIO DFL driver.

The feature id is used in, e.g., Intel Oak Springs Canyon IPUs
to expose various IPs to user space, e.g., Network Controller
Sideband Interface (NC-SI), BaseNIC, and VirtIO management.

Link: https://github.com/OPAE/dfl-feature-id
Signed-off-by: Peter Colberg <peter.colberg@intel.com>
Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com>
Reviewed-by: Russ Weight <russell.h.weight@intel.com>
Link: https://lore.kernel.org/r/20230531030737.12989-1-peter.colberg@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/uio/uio_dfl.c b/drivers/uio/uio_dfl.c
index 69e93f3e7faf4bf1e1cdbd587305b198cd68be6c..6d99e5a06ae8c27a100f35f3e8076385b0d6b3d5 100644 (file)
--- a/drivers/uio/uio_dfl.c
+++ b/drivers/uio/uio_dfl.c
@@ -46,11 +46,13 @@ static int uio_dfl_probe(struct dfl_device *ddev)
 
 #define FME_FEATURE_ID_ETH_GROUP       0x10
 #define FME_FEATURE_ID_HSSI_SUBSYS     0x15
+#define FME_FEATURE_ID_VENDOR_SPECIFIC 0x23
 #define PORT_FEATURE_ID_IOPLL_USRCLK   0x14
 
 static const struct dfl_device_id uio_dfl_ids[] = {
        { FME_ID, FME_FEATURE_ID_ETH_GROUP },
        { FME_ID, FME_FEATURE_ID_HSSI_SUBSYS },
+       { FME_ID, FME_FEATURE_ID_VENDOR_SPECIFIC },
        { PORT_ID, PORT_FEATURE_ID_IOPLL_USRCLK },
        { }
 };