net: thunderx: Configure RED and backpressure levels
This patch enables moving average calculation of Rx pkt's resources
and configures RED and backpressure levels for both CQ and RBDR.
Also initialize SQ's CQ_LIMIT properly.
Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/cavium/thunder/nic_main.c b/drivers/net/ethernet/cavium/thunder/nic_main.c
index b87d416..17490ec 100644
--- a/drivers/net/ethernet/cavium/thunder/nic_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nic_main.c
@@ -809,6 +809,15 @@ static int nic_config_loopback(struct nicpf *nic, struct set_loopback *lbk)
bgx_lmac_internal_loopback(nic->node, bgx_idx, lmac_idx, lbk->enable);
+ /* Enable moving average calculation.
+ * Keep the LVL/AVG delay to HW enforced minimum so that, not too many
+ * packets sneek in between average calculations.
+ */
+ nic_reg_write(nic, NIC_PF_CQ_AVG_CFG,
+ (BIT_ULL(20) | 0x2ull << 14 | 0x1));
+ nic_reg_write(nic, NIC_PF_RRM_AVG_CFG,
+ (BIT_ULL(20) | 0x3ull << 14 | 0x1));
+
return 0;
}