[dpdk-dev] [PATCH 8/9] net/cnxk: allow fc on lbk and enable tm bp on Rx pause

[Nithin Dabilpuram]

Allow flow control on LBK VF's and enable TM to listen on
backpressure when Rx pause is enabled.

Signed-off-by: Nithin Dabilpuram <ndabilpu...@marvell.com>
---
 drivers/net/cnxk/cnxk_ethdev.c     | 12 ++++++------
 drivers/net/cnxk/cnxk_ethdev_ops.c | 14 +++++++++++++-
 2 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/drivers/net/cnxk/cnxk_ethdev.c b/drivers/net/cnxk/cnxk_ethdev.c
index 5059fca..a62ded6 100644
--- a/drivers/net/cnxk/cnxk_ethdev.c
+++ b/drivers/net/cnxk/cnxk_ethdev.c
@@ -332,7 +332,7 @@ nix_update_flow_ctrl_config(struct rte_eth_dev *eth_dev)
        struct cnxk_fc_cfg *fc = &dev->fc_cfg;
        struct rte_eth_fc_conf fc_cfg = {0};
 
-       if (roc_nix_is_vf_or_sdp(&dev->nix))
+       if (roc_nix_is_vf_or_sdp(&dev->nix) && !roc_nix_is_lbk(&dev->nix))
                return 0;
 
        fc_cfg.mode = fc->mode;
@@ -1233,6 +1233,11 @@ cnxk_nix_configure(struct rte_eth_dev *eth_dev)
                goto cq_fini;
        }
 
+       /* Setup Inline security support */
+       rc = nix_security_setup(dev);
+       if (rc)
+               goto cq_fini;
+
        /* Init flow control configuration */
        fc_cfg.type = ROC_NIX_FC_RXCHAN_CFG;
        fc_cfg.rxchan_cfg.enable = true;
@@ -1249,11 +1254,6 @@ cnxk_nix_configure(struct rte_eth_dev *eth_dev)
                goto cq_fini;
        }
 
-       /* Setup Inline security support */
-       rc = nix_security_setup(dev);
-       if (rc)
-               goto cq_fini;
-
        /*
         * Restore queue config when reconfigure followed by
         * reconfigure and no queue configure invoked from application case.
diff --git a/drivers/net/cnxk/cnxk_ethdev_ops.c 
b/drivers/net/cnxk/cnxk_ethdev_ops.c
index baa474f..7b3ee75 100644
--- a/drivers/net/cnxk/cnxk_ethdev_ops.c
+++ b/drivers/net/cnxk/cnxk_ethdev_ops.c
@@ -250,7 +250,7 @@ cnxk_nix_flow_ctrl_set(struct rte_eth_dev *eth_dev,
        uint8_t rx_pause, tx_pause;
        int rc, i;
 
-       if (roc_nix_is_vf_or_sdp(nix)) {
+       if (roc_nix_is_vf_or_sdp(nix) && !roc_nix_is_lbk(nix)) {
                plt_err("Flow control configuration is not allowed on VFs");
                return -ENOTSUP;
        }
@@ -287,6 +287,18 @@ cnxk_nix_flow_ctrl_set(struct rte_eth_dev *eth_dev,
                }
        }
 
+       /* Check if RX pause frame is enabled or not */
+       if (fc->rx_pause ^ rx_pause) {
+               struct roc_nix_fc_cfg fc_cfg;
+
+               memset(&fc_cfg, 0, sizeof(struct roc_nix_fc_cfg));
+               fc_cfg.type = ROC_NIX_FC_TM_CFG;
+               fc_cfg.tm_cfg.enable = !!rx_pause;
+               rc = roc_nix_fc_config_set(nix, &fc_cfg);
+               if (rc)
+                       return rc;
+       }
+
        rc = roc_nix_fc_mode_set(nix, mode_map[fc_conf->mode]);
        if (rc)
                return rc;
-- 
2.8.4