net/bnxt: inform firmware about host MTU

This enables device firmware to respond appropriately to BMC queries
about the driver's configured MTU.

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Lance Richardson <lance.richardson@broadcom.com>

diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 19d52fa..de34a2f 100644 (file)
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -3062,6 +3062,9 @@ int bnxt_mtu_set_op(struct rte_eth_dev *eth_dev, uint16_t new_mtu)
        if (!rc)
                eth_dev->data->dev_conf.rxmode.max_rx_pkt_len = new_pkt_size;
 
+       if (bnxt_hwrm_config_host_mtu(bp))
+               PMD_DRV_LOG(WARNING, "Failed to configure host MTU\n");
+
        PMD_DRV_LOG(INFO, "New MTU is %d\n", new_mtu);
 
        return rc;

diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index 0568476..d583839 100644 (file)
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -3469,6 +3469,7 @@ static int bnxt_hwrm_pf_func_cfg(struct bnxt *bp,
        int rc;
 
        enables = HWRM_FUNC_CFG_INPUT_ENABLES_ADMIN_MTU |
+                 HWRM_FUNC_CFG_INPUT_ENABLES_HOST_MTU |
                  HWRM_FUNC_CFG_INPUT_ENABLES_MRU |
                  HWRM_FUNC_CFG_INPUT_ENABLES_NUM_RSSCOS_CTXS |
                  HWRM_FUNC_CFG_INPUT_ENABLES_NUM_STAT_CTXS |
@@ -3489,6 +3490,7 @@ static int bnxt_hwrm_pf_func_cfg(struct bnxt *bp,
 
        req.flags = rte_cpu_to_le_32(bp->pf->func_cfg_flags);
        req.admin_mtu = rte_cpu_to_le_16(BNXT_MAX_MTU);
+       req.host_mtu = rte_cpu_to_le_16(bp->eth_dev->data->mtu);
        req.mru = rte_cpu_to_le_16(BNXT_VNIC_MRU(bp->eth_dev->data->mtu));
        req.num_rsscos_ctxs = rte_cpu_to_le_16(pf_resc->num_rsscos_ctxs);
        req.num_stat_ctxs = rte_cpu_to_le_16(pf_resc->num_stat_ctxs);
@@ -6203,3 +6205,25 @@ void bnxt_free_hwrm_tx_ring(struct bnxt *bp, int queue_index)
 
        bnxt_free_cp_ring(bp, cpr);
 }
+
+int bnxt_hwrm_config_host_mtu(struct bnxt *bp)
+{
+       struct hwrm_func_cfg_input req = {0};
+       struct hwrm_func_cfg_output *resp = bp->hwrm_cmd_resp_addr;
+       int rc;
+
+       if (!BNXT_PF(bp))
+               return 0;
+
+       HWRM_PREP(&req, HWRM_FUNC_CFG, BNXT_USE_CHIMP_MB);
+
+       req.fid = rte_cpu_to_le_16(0xffff);
+       req.enables = rte_cpu_to_le_32(HWRM_FUNC_CFG_INPUT_ENABLES_HOST_MTU);
+       req.host_mtu = rte_cpu_to_le_16(bp->eth_dev->data->mtu);
+
+       rc = bnxt_hwrm_send_message(bp, &req, sizeof(req), BNXT_USE_CHIMP_MB);
+       HWRM_CHECK_RESULT();
+       HWRM_UNLOCK();
+
+       return rc;
+}

diff --git a/drivers/net/bnxt/bnxt_hwrm.h b/drivers/net/bnxt/bnxt_hwrm.h
index ec3414f..80e3128 100644 (file)
--- a/drivers/net/bnxt/bnxt_hwrm.h
+++ b/drivers/net/bnxt/bnxt_hwrm.h
@@ -307,4 +307,5 @@ int bnxt_hwrm_read_sfp_module_eeprom_info(struct bnxt *bp, uint16_t i2c_addr,
 int bnxt_hwrm_stat_ctx_alloc(struct bnxt *bp, struct bnxt_cp_ring_info *cpr);
 void bnxt_free_hwrm_tx_ring(struct bnxt *bp, int queue_index);
 int bnxt_alloc_hwrm_tx_ring(struct bnxt *bp, int queue_index);
+int bnxt_hwrm_config_host_mtu(struct bnxt *bp);
 #endif