[dpdk-dev] [PATCH 2/4] net/bnxt: inform firmware about host MTU

[Kalesh A P]

From: Kalesh AP <kalesh-anakkur.purayil at broadcom.com>

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

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil at broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde at broadcom.com>
Reviewed-by: Lance Richardson <lance.richardson at broadcom.com>
---
 drivers/net/bnxt/bnxt_ethdev.c |  3 +++
 drivers/net/bnxt/bnxt_hwrm.c   | 24 ++++++++++++++++++++++++
 drivers/net/bnxt/bnxt_hwrm.h   |  1 +
 3 files changed, 28 insertions(+)

diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index ed09f1b..7147f17 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -3067,6 +3067,9 @@ 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
--- 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
--- 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
-- 
2.10.1