net/bnxt: fix MTU calculation

We were not considering the case of nested VLANs while
calculating MTU. This patch takes care of the same.

Fixes: daef48efe5e5 ("net/bnxt: support set MTU")
Cc: stable@dpdk.org
Signed-off-by: Qingmin Liu <qingmin.liu@broadcom.com>
Signed-off-by: Scott Branden <scott.branden@broadcom.com>
Reviewed-by: Jay Ding <jay.ding@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Randy Schacher <stuart.schacher@broadcom.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>

diff --git a/drivers/net/bnxt/bnxt.h b/drivers/net/bnxt/bnxt.h
index 97b0e08..110cdb9 100644 (file)
--- a/drivers/net/bnxt/bnxt.h
+++ b/drivers/net/bnxt/bnxt.h
@@ -23,6 +23,7 @@
 #define BNXT_MAX_MTU           9500
 #define VLAN_TAG_SIZE          4
 #define BNXT_MAX_LED           4
+#define BNXT_NUM_VLANS         2
 
 struct bnxt_led_info {
        uint8_t      led_id;

diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index df4bed4..cd5acc6 100644 (file)
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -552,7 +552,8 @@ static int bnxt_dev_configure_op(struct rte_eth_dev *eth_dev)
        if (rx_offloads & DEV_RX_OFFLOAD_JUMBO_FRAME) {
                eth_dev->data->mtu =
                                eth_dev->data->dev_conf.rxmode.max_rx_pkt_len -
-                               ETHER_HDR_LEN - ETHER_CRC_LEN - VLAN_TAG_SIZE;
+                               ETHER_HDR_LEN - ETHER_CRC_LEN - VLAN_TAG_SIZE *
+                               BNXT_NUM_VLANS;
                bnxt_mtu_set_op(eth_dev, eth_dev->data->mtu);
        }
        return 0;

diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index bc87735..c136edc 100644 (file)
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -2360,7 +2360,8 @@ static int bnxt_hwrm_pf_func_cfg(struct bnxt *bp, int tx_rings)
        req.flags = rte_cpu_to_le_32(bp->pf.func_cfg_flags);
        req.mtu = rte_cpu_to_le_16(BNXT_MAX_MTU);
        req.mru = rte_cpu_to_le_16(bp->eth_dev->data->mtu + ETHER_HDR_LEN +
-                                  ETHER_CRC_LEN + VLAN_TAG_SIZE);
+                                  ETHER_CRC_LEN + VLAN_TAG_SIZE *
+                                  BNXT_NUM_VLANS);
        req.num_rsscos_ctxs = rte_cpu_to_le_16(bp->max_rsscos_ctx);
        req.num_stat_ctxs = rte_cpu_to_le_16(bp->max_stat_ctx);
        req.num_cmpl_rings = rte_cpu_to_le_16(bp->max_cp_rings);
@@ -2397,9 +2398,11 @@ static void populate_vf_func_cfg_req(struct bnxt *bp,
                        HWRM_FUNC_CFG_INPUT_ENABLES_NUM_HW_RING_GRPS);
 
        req->mtu = rte_cpu_to_le_16(bp->eth_dev->data->mtu + ETHER_HDR_LEN +
-                                   ETHER_CRC_LEN + VLAN_TAG_SIZE);
+                                   ETHER_CRC_LEN + VLAN_TAG_SIZE *
+                                   BNXT_NUM_VLANS);
        req->mru = rte_cpu_to_le_16(bp->eth_dev->data->mtu + ETHER_HDR_LEN +
-                                   ETHER_CRC_LEN + VLAN_TAG_SIZE);
+                                   ETHER_CRC_LEN + VLAN_TAG_SIZE *
+                                   BNXT_NUM_VLANS);
        req->num_rsscos_ctxs = rte_cpu_to_le_16(bp->max_rsscos_ctx /
                                                (num_vfs + 1));
        req->num_stat_ctxs = rte_cpu_to_le_16(bp->max_stat_ctx / (num_vfs + 1));