DCB: Add interface to query for the DCB capabilities of an device.

Adds to the netlink interface for Data Center Bridging (DCB), allowing
the DCB capabilities supported by a device to be queried.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 41 insertions, 1 deletions

diff --git a/drivers/net/ixgbe/ixgbe_dcb_nl.c b/drivers/net/ixgbe/ixgbe_dcb_nl.c
index 50bff2af6b0..eb3a6cea1aa 100644
--- a/drivers/net/ixgbe/ixgbe_dcb_nl.c
+++ b/drivers/net/ixgbe/ixgbe_dcb_nl.c
@@ -337,6 +337,45 @@ static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
         return ret;
 }
 
+static u8 ixgbe_dcbnl_getcap(struct net_device *netdev, int capid, u8 *cap)
+{
+        struct ixgbe_adapter *adapter = netdev_priv(netdev);
+        u8 rval = 0;
+
+        if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
+                switch (capid) {
+                case DCB_CAP_ATTR_PG:
+                        *cap = true;
+                        break;
+                case DCB_CAP_ATTR_PFC:
+                        *cap = true;
+                        break;
+                case DCB_CAP_ATTR_UP2TC:
+                        *cap = false;
+                        break;
+                case DCB_CAP_ATTR_PG_TCS:
+                        *cap = 0x80;
+                        break;
+                case DCB_CAP_ATTR_PFC_TCS:
+                        *cap = 0x80;
+                        break;
+                case DCB_CAP_ATTR_GSP:
+                        *cap = true;
+                        break;
+                case DCB_CAP_ATTR_BCN:
+                        *cap = false;
+                        break;
+                default:
+                        rval = -EINVAL;
+                        break;
+                }
+        } else {
+                rval = -EINVAL;
+        }
+
+        return rval;
+}
+
 struct dcbnl_rtnl_ops dcbnl_ops = {
         .getstate       = ixgbe_dcbnl_get_state,
         .setstate       = ixgbe_dcbnl_set_state,
@@ -351,6 +390,7 @@ struct dcbnl_rtnl_ops dcbnl_ops = {
         .getpgbwgcfgrx  = ixgbe_dcbnl_get_pg_bwg_cfg_rx,
         .setpfccfg      = ixgbe_dcbnl_set_pfc_cfg,
         .getpfccfg      = ixgbe_dcbnl_get_pfc_cfg,
-        .setall         = ixgbe_dcbnl_set_all
+        .setall         = ixgbe_dcbnl_set_all,
+        .getcap         = ixgbe_dcbnl_getcap
 };