net/mlx4_en: Fix set port ratelimit for 40GE
In 40GE we can't use the default bw units for set ratelimit (100 Mbps)
since the max is 255*100 Mbps = 25 Gbps (not suited for 40GE), thus we need 1 Gbps units.
But for 10GE 1 Gbps units might be too bruit so we use the following solution.
For user set ratelimit <= 25 Gbps:
use 100 Mbps units * user_ratelimit (* 10).
For user set ratelimit > 25 Gbps:
use 1 Gbps units * user_ratelimit.
For user set unlimited ratelimit (0 Gbps):
use 1 Gbps units * MAX_RATELIMIT_DEFAULT (57)
Note: any value > 58 will damage the FW ratelimit computation, so we allow
a max and any higher value will be pulled down to 57.
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index b12f4bb..db0aef3 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -48,6 +48,17 @@
#define MSIX_LEGACY_SZ 4
#define MIN_MSIX_P_PORT 5
+#define MLX4_NUM_UP 8
+#define MLX4_NUM_TC 8
+#define MLX4_MAX_100M_UNITS_VAL 255 /*
+ * work around: can't set values
+ * greater then this value when
+ * using 100 Mbps units.
+ */
+#define MLX4_RATELIMIT_100M_UNITS 3 /* 100 Mbps */
+#define MLX4_RATELIMIT_1G_UNITS 4 /* 1 Gbps */
+#define MLX4_RATELIMIT_DEFAULT 0x00ff
+
#define MLX4_ROCE_MAX_GIDS 128
#define MLX4_ROCE_PF_GIDS 16