net/mlx4_en: num cores tx rings for every UP
Change the TX ring scheme such that the number of rings for untagged packets
and for tagged packets (per each of the vlan priorities) is the same, unlike
the current situation where for tagged traffic there's one ring per priority
and for untagged rings as the number of core.
Queue selection is done as follows:
If the mqprio qdisc is operates on the interface, such that the core networking
code invoked the device setup_tc ndo callback, a mapping of skb->priority =>
queue set is forced - for both, tagged and untagged traffic.
Else, the egress map skb->priority => User priority is used for tagged traffic, and
all untagged traffic is sent through tx rings of UP 0.
The patch follows the convergence of discussing that issue with John Fastabend
over this thread http://comments.gmane.org/gmane.linux.network/229877
Cc: John Fastabend <john.r.fastabend@intel.com>
Cc: Liran Liss <liranl@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
index 5d87637..6ae3509 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
@@ -111,9 +111,7 @@
#define MLX4_EN_MIN_TX_SIZE (4096 / TXBB_SIZE)
#define MLX4_EN_SMALL_PKT_SIZE 64
-#define MLX4_EN_NUM_TX_RINGS 8
-#define MLX4_EN_NUM_PPP_RINGS 8
-#define MAX_TX_RINGS (MLX4_EN_NUM_TX_RINGS + MLX4_EN_NUM_PPP_RINGS)
+#define MLX4_EN_MAX_TX_RING_P_UP 32
#define MLX4_EN_NUM_UP 8
#define MLX4_EN_DEF_TX_RING_SIZE 512
#define MLX4_EN_DEF_RX_RING_SIZE 1024
@@ -339,6 +337,7 @@
u32 active_ports;
u32 small_pkt_int;
u8 no_reset;
+ u8 num_tx_rings_p_up;
struct mlx4_en_port_profile prof[MLX4_MAX_PORTS + 1];
};
@@ -477,9 +476,9 @@
u16 num_frags;
u16 log_rx_info;
- struct mlx4_en_tx_ring tx_ring[MAX_TX_RINGS];
+ struct mlx4_en_tx_ring *tx_ring;
struct mlx4_en_rx_ring rx_ring[MAX_RX_RINGS];
- struct mlx4_en_cq tx_cq[MAX_TX_RINGS];
+ struct mlx4_en_cq *tx_cq;
struct mlx4_en_cq rx_cq[MAX_RX_RINGS];
struct work_struct mcast_task;
struct work_struct mac_task;