net/ethtool: introduce a new ioctl for per queue setting

Introduce a new ioctl ETHTOOL_PERQUEUE for per queue parameters setting.
The following patches will enable some SUB_COMMANDs for per queue
setting.

Signed-off-by: Kan Liang <kan.liang@intel.com>
Reviewed-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 17 insertions, 0 deletions

diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index 190aea0faaf4..f15ae02621a1 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -1202,6 +1202,21 @@ enum ethtool_sfeatures_retval_bits {
 #define ETHTOOL_F_WISH          (1 << ETHTOOL_F_WISH__BIT)
 #define ETHTOOL_F_COMPAT        (1 << ETHTOOL_F_COMPAT__BIT)
 
+#define MAX_NUM_QUEUE           4096
+
+/**
+ * struct ethtool_per_queue_op - apply sub command to the queues in mask.
+ * @cmd: ETHTOOL_PERQUEUE
+ * @sub_command: the sub command which apply to each queues
+ * @queue_mask: Bitmap of the queues which sub command apply to
+ * @data: A complete command structure following for each of the queues addressed
+ */
+struct ethtool_per_queue_op {
+        __u32   cmd;
+        __u32   sub_command;
+        __u32   queue_mask[DIV_ROUND_UP(MAX_NUM_QUEUE, 32)];
+        char    data[];
+};
 
 /* CMDs currently supported */
 #define ETHTOOL_GSET            0x00000001 /* Get settings. */
@@ -1285,6 +1300,8 @@ enum ethtool_sfeatures_retval_bits {
 #define ETHTOOL_STUNABLE        0x00000049 /* Set tunable configuration */
 #define ETHTOOL_GPHYSTATS       0x0000004a /* get PHY-specific statistics */
 
+#define ETHTOOL_PERQUEUE        0x0000004b /* Set per queue options */
+
 /* compatibility with older code */
 #define SPARC_ETH_GSET          ETHTOOL_GSET
 #define SPARC_ETH_SSET          ETHTOOL_SSET