dcbnl: add support for retrieving peer configuration - cee

This patch adds the support for retrieving the remote or peer DCBX
configuration via dcbnl for embedded DCBX stacks supporting the CEE DCBX
standard.

Signed-off-by: Shmulik Ravid <shmulikr@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 74 insertions, 0 deletions

diff --git a/include/linux/dcbnl.h b/include/linux/dcbnl.h
index 2542685f8b3e..a3680a16718f 100644
--- a/include/linux/dcbnl.h
+++ b/include/linux/dcbnl.h
@@ -87,6 +87,45 @@ struct ieee_pfc {
         __u64   indications[IEEE_8021QAZ_MAX_TCS];
 };
 
+/* CEE DCBX std supported values */
+#define CEE_DCBX_MAX_PGS        8
+#define CEE_DCBX_MAX_PRIO       8
+
+/**
+ * struct cee_pg - CEE Prioity-Group managed object
+ *
+ * @willing: willing bit in the PG tlv
+ * @error: error bit in the PG tlv
+ * @pg_en: enable bit of the PG feature
+ * @tcs_supported: number of traffic classes supported
+ * @pg_bw: bandwidth percentage for each priority group
+ * @prio_pg: priority to PG mapping indexed by priority
+ */
+struct cee_pg {
+        __u8    willing;
+        __u8    error;
+        __u8    pg_en;
+        __u8    tcs_supported;
+        __u8    pg_bw[CEE_DCBX_MAX_PGS];
+        __u8    prio_pg[CEE_DCBX_MAX_PGS];
+};
+
+/**
+ * struct cee_pfc - CEE PFC managed object
+ *
+ * @willing: willing bit in the PFC tlv
+ * @error: error bit in the PFC tlv
+ * @pfc_en: bitmap indicating pfc enabled traffic classes
+ * @tcs_supported: number of traffic classes supported
+ */
+struct cee_pfc {
+        __u8    willing;
+        __u8    error;
+        __u8    pfc_en;
+        __u8    tcs_supported;
+};
+
+
 /* This structure contains the IEEE 802.1Qaz APP managed object. This
  * object is also used for the CEE std as well. There is no difference
  * between the objects.
@@ -158,6 +197,7 @@ struct dcbmsg {
  * @DCB_CMD_SDCBX: set DCBX engine configuration
  * @DCB_CMD_GFEATCFG: get DCBX features flags
  * @DCB_CMD_SFEATCFG: set DCBX features negotiation flags
+ * @DCB_CMD_CEE_GET: get CEE aggregated configuration
  */
 enum dcbnl_commands {
         DCB_CMD_UNDEFINED,
@@ -200,6 +240,8 @@ enum dcbnl_commands {
         DCB_CMD_GFEATCFG,
         DCB_CMD_SFEATCFG,
 
+        DCB_CMD_CEE_GET,
+
         __DCB_CMD_ENUM_MAX,
         DCB_CMD_MAX = __DCB_CMD_ENUM_MAX - 1,
 };
@@ -222,6 +264,7 @@ enum dcbnl_commands {
  * @DCB_ATTR_IEEE: IEEE 802.1Qaz supported attributes (NLA_NESTED)
  * @DCB_ATTR_DCBX: DCBX engine configuration in the device (NLA_U8)
  * @DCB_ATTR_FEATCFG: DCBX features flags (NLA_NESTED)
+ * @DCB_ATTR_CEE: CEE std supported attributes (NLA_NESTED)
  */
 enum dcbnl_attrs {
         DCB_ATTR_UNDEFINED,
@@ -245,6 +288,9 @@ enum dcbnl_attrs {
         DCB_ATTR_DCBX,
         DCB_ATTR_FEATCFG,
 
+        /* CEE nested attributes */
+        DCB_ATTR_CEE,
+
         __DCB_ATTR_ENUM_MAX,
         DCB_ATTR_MAX = __DCB_ATTR_ENUM_MAX - 1,
 };
@@ -280,6 +326,31 @@ enum ieee_attrs_app {
 #define DCB_ATTR_IEEE_APP_MAX (__DCB_ATTR_IEEE_APP_MAX - 1)
 
 /**
+ * enum cee_attrs - CEE DCBX get attributes
+ *
+ * @DCB_ATTR_CEE_UNSPEC: unspecified
+ * @DCB_ATTR_CEE_PEER_PG: peer PG configuration - get only
+ * @DCB_ATTR_CEE_PEER_PFC: peer PFC configuration - get only
+ * @DCB_ATTR_CEE_PEER_APP: peer APP tlv - get only
+ */
+enum cee_attrs {
+        DCB_ATTR_CEE_UNSPEC,
+        DCB_ATTR_CEE_PEER_PG,
+        DCB_ATTR_CEE_PEER_PFC,
+        DCB_ATTR_CEE_PEER_APP_TABLE,
+        __DCB_ATTR_CEE_MAX
+};
+#define DCB_ATTR_CEE_MAX (__DCB_ATTR_CEE_MAX - 1)
+
+enum peer_app_attr {
+        DCB_ATTR_CEE_PEER_APP_UNSPEC,
+        DCB_ATTR_CEE_PEER_APP_INFO,
+        DCB_ATTR_CEE_PEER_APP,
+        __DCB_ATTR_CEE_PEER_APP_MAX
+};
+#define DCB_ATTR_CEE_PEER_APP_MAX (__DCB_ATTR_CEE_PEER_APP_MAX - 1)
+
+/**
  * enum dcbnl_pfc_attrs - DCB Priority Flow Control user priority nested attrs
  *
  * @DCB_PFC_UP_ATTR_UNDEFINED: unspecified attribute to catch errors
diff --git a/include/net/dcbnl.h b/include/net/dcbnl.h
index 7b7180e692ef..e5983c9053dc 100644
--- a/include/net/dcbnl.h
+++ b/include/net/dcbnl.h
@@ -84,6 +84,9 @@ struct dcbnl_rtnl_ops {
                                u16 *);
         int (*peer_getapptable)(struct net_device *, struct dcb_app *);
 
+        /* CEE peer */
+        int (*cee_peer_getpg) (struct net_device *, struct cee_pg *);
+        int (*cee_peer_getpfc) (struct net_device *, struct cee_pfc *);
 };
 
 #endif /* __NET_DCBNL_H__ */