net/bnxt: add access to NAT global register

Add support to enable or disable the NAT global registers.
The NAT feature is enabled in hardware during initialization
and disabled at deinitialization of the application.

Signed-off-by: Kishore Padmanabha <kishore.padmanabha@broadcom.com>
Reviewed-by: Mike Baucom <michael.baucom@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>

diff --git a/drivers/net/bnxt/tf_ulp/bnxt_ulp.c b/drivers/net/bnxt/tf_ulp/bnxt_ulp.c
index 0869231..7c65a4b 100644 (file)
--- a/drivers/net/bnxt/tf_ulp/bnxt_ulp.c
+++ b/drivers/net/bnxt/tf_ulp/bnxt_ulp.c
@@ -596,6 +596,52 @@ ulp_session_deinit(struct bnxt_ulp_session_state *session)
        }
 }
 
+/*
+ * Internal api to enable NAT feature.
+ * Set set_flag to 1 to set the value or zero to reset the value.
+ * returns 0 on success.
+ */
+static int32_t
+bnxt_ulp_global_cfg_update(struct bnxt *bp,
+                          enum tf_dir dir,
+                          enum tf_global_config_type type,
+                          uint32_t offset,
+                          uint32_t value,
+                          uint32_t set_flag)
+{
+       uint32_t global_cfg = 0;
+       int rc;
+       struct tf_global_cfg_parms parms;
+
+       /* Initialize the params */
+       parms.dir = dir,
+       parms.type = type,
+       parms.offset = offset,
+       parms.config = (uint8_t *)&global_cfg,
+       parms.config_sz_in_bytes = sizeof(global_cfg);
+
+       rc = tf_get_global_cfg(&bp->tfp, &parms);
+       if (rc) {
+               BNXT_TF_DBG(ERR, "Failed to get global cfg 0x%x rc:%d\n",
+                           type, rc);
+               return rc;
+       }
+
+       if (set_flag)
+               global_cfg |= value;
+       else
+               global_cfg &= ~value;
+
+       /* SET the register RE_CFA_REG_ACT_TECT */
+       rc = tf_set_global_cfg(&bp->tfp, &parms);
+       if (rc) {
+               BNXT_TF_DBG(ERR, "Failed to set global cfg 0x%x rc:%d\n",
+                           type, rc);
+               return rc;
+       }
+       return rc;
+}
+
 /*
  * When a port is initialized by dpdk. This functions is called
  * and this function initializes the ULP context and rest of the
@@ -732,6 +778,29 @@ bnxt_ulp_init(struct bnxt *bp)
                goto jump_to_error;
        }
 
+       /*
+        * Enable NAT feature. Set the global configuration register
+        * Tunnel encap to enable NAT with the reuse of existing inner
+        * L2 header smac and dmac
+        */
+       rc = bnxt_ulp_global_cfg_update(bp, TF_DIR_RX, TF_TUNNEL_ENCAP,
+                                       TF_TUNNEL_ENCAP_NAT,
+                                       (BNXT_ULP_NAT_INNER_L2_HEADER_SMAC |
+                                       BNXT_ULP_NAT_INNER_L2_HEADER_DMAC), 1);
+       if (rc) {
+               BNXT_TF_DBG(ERR, "Failed to set rx global configuration\n");
+               goto jump_to_error;
+       }
+
+       rc = bnxt_ulp_global_cfg_update(bp, TF_DIR_TX, TF_TUNNEL_ENCAP,
+                                       TF_TUNNEL_ENCAP_NAT,
+                                       (BNXT_ULP_NAT_INNER_L2_HEADER_SMAC |
+                                       BNXT_ULP_NAT_INNER_L2_HEADER_DMAC), 1);
+       if (rc) {
+               BNXT_TF_DBG(ERR, "Failed to set tx global configuration\n");
+               goto jump_to_error;
+       }
+
        return rc;
 
 jump_to_error:
@@ -785,6 +854,19 @@ bnxt_ulp_deinit(struct bnxt *bp)
        /* Delete the Port database */
        ulp_port_db_deinit(bp->ulp_ctx);
 
+       /* Disable NAT feature */
+       (void)bnxt_ulp_global_cfg_update(bp, TF_DIR_RX, TF_TUNNEL_ENCAP,
+                                        TF_TUNNEL_ENCAP_NAT,
+                                        (BNXT_ULP_NAT_INNER_L2_HEADER_SMAC |
+                                         BNXT_ULP_NAT_INNER_L2_HEADER_DMAC),
+                                        0);
+
+       (void)bnxt_ulp_global_cfg_update(bp, TF_DIR_TX, TF_TUNNEL_ENCAP,
+                                        TF_TUNNEL_ENCAP_NAT,
+                                        (BNXT_ULP_NAT_INNER_L2_HEADER_SMAC |
+                                         BNXT_ULP_NAT_INNER_L2_HEADER_DMAC),
+                                        0);
+
        /* Delete the ulp context and tf session */
        ulp_ctx_detach(bp, session);
 
@@ -942,6 +1024,7 @@ bnxt_ulp_eth_dev_ptr2_cntxt_get(struct rte_eth_dev *dev)
 
        if (BNXT_ETH_DEV_IS_REPRESENTOR(dev)) {
                struct bnxt_vf_representor *vfr = dev->data->dev_private;
+
                bp = vfr->parent_dev->data->dev_private;
        }
 

diff --git a/drivers/net/bnxt/tf_ulp/bnxt_ulp.h b/drivers/net/bnxt/tf_ulp/bnxt_ulp.h
index f9e5e2b..7c95ead 100644 (file)
--- a/drivers/net/bnxt/tf_ulp/bnxt_ulp.h
+++ b/drivers/net/bnxt/tf_ulp/bnxt_ulp.h
@@ -14,6 +14,10 @@
 
 #include "ulp_template_db_enum.h"
 
+/* NAT defines to reuse existing inner L2 SMAC and DMAC */
+#define BNXT_ULP_NAT_INNER_L2_HEADER_SMAC      0x2000
+#define BNXT_ULP_NAT_INNER_L2_HEADER_DMAC      0x100
+
 /* defines for the ulp_flags */
 #define BNXT_ULP_VF_REP_ENABLED                0x1
 #define ULP_VF_REP_IS_ENABLED(flag)    ((flag) & BNXT_ULP_VF_REP_ENABLED)