devlink: implement shared buffer occupancy monitoring interface

User needs to monitor shared buffer occupancy. For that, he issues a
snapshot command in order to instruct hardware to catch current and
maximal occupancy values, and clear command in order to clear the
historical maximal values.

Also port-pool and tc-pool-bind command response messages are extended to
carry occupancy values.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index 9c1aa5783090..ba0073b26fa6 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -53,6 +53,10 @@ enum devlink_command {
         DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
         DEVLINK_CMD_SB_TC_POOL_BIND_DEL,
 
+        /* Shared buffer occupancy monitoring commands */
+        DEVLINK_CMD_SB_OCC_SNAPSHOT,
+        DEVLINK_CMD_SB_OCC_MAX_CLEAR,
+
         /* add new commands above here */
 
         __DEVLINK_CMD_MAX,
@@ -119,6 +123,8 @@ enum devlink_attr {
         DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,    /* u8 */
         DEVLINK_ATTR_SB_THRESHOLD,              /* u32 */
         DEVLINK_ATTR_SB_TC_INDEX,               /* u16 */
+        DEVLINK_ATTR_SB_OCC_CUR,                /* u32 */
+        DEVLINK_ATTR_SB_OCC_MAX,                /* u32 */
 
         /* add new attributes above here, update the policy in devlink.c */