bnxt_en: Add a helper function to configure MRU and RSS

Add a new helper function that will configure MRU and RSS table
of a VNIC. This will be useful when we configure both on a VNIC
when resetting an RX ring.  This function will be used again in
the next bug fix patch where we have to reconfigure VNICs for RSS
contexts.

Suggested-by: Michael Chan <michael.chan@broadcom.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: David Wei <dw@davidwei.uk>
Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20250613231841.377988-3-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 869580b6f70ddf10f0f9b92c69c435b00bcec895..dfd2366d4c8ca5ae1fd0e3f8360e86377c8342bd 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -10780,6 +10780,26 @@ void bnxt_del_one_rss_ctx(struct bnxt *bp, struct bnxt_rss_ctx *rss_ctx,
        bp->num_rss_ctx--;
 }
 
+static int bnxt_set_vnic_mru_p5(struct bnxt *bp, struct bnxt_vnic_info *vnic,
+                               u16 mru)
+{
+       int rc;
+
+       if (mru) {
+               rc = bnxt_hwrm_vnic_set_rss_p5(bp, vnic, true);
+               if (rc) {
+                       netdev_err(bp->dev, "hwrm vnic %d set rss failure rc: %d\n",
+                                  vnic->vnic_id, rc);
+                       return rc;
+               }
+       }
+       vnic->mru = mru;
+       bnxt_hwrm_vnic_update(bp, vnic,
+                             VNIC_UPDATE_REQ_ENABLES_MRU_VALID);
+
+       return 0;
+}
+
 static void bnxt_hwrm_realloc_rss_ctx_vnic(struct bnxt *bp)
 {
        bool set_tpa = !!(bp->flags & BNXT_FLAG_TPA);
@@ -15927,6 +15947,7 @@ static int bnxt_queue_start(struct net_device *dev, void *qmem, int idx)
        struct bnxt_vnic_info *vnic;
        struct bnxt_napi *bnapi;
        int i, rc;
+       u16 mru;
 
        rxr = &bp->rx_ring[idx];
        clone = qmem;
@@ -15977,18 +15998,13 @@ static int bnxt_queue_start(struct net_device *dev, void *qmem, int idx)
        napi_enable_locked(&bnapi->napi);
        bnxt_db_nq_arm(bp, &cpr->cp_db, cpr->cp_raw_cons);
 
+       mru = bp->dev->mtu + ETH_HLEN + VLAN_HLEN;
        for (i = 0; i < bp->nr_vnics; i++) {
                vnic = &bp->vnic_info[i];
 
-               rc = bnxt_hwrm_vnic_set_rss_p5(bp, vnic, true);
-               if (rc) {
-                       netdev_err(bp->dev, "hwrm vnic %d set rss failure rc: %d\n",
-                                  vnic->vnic_id, rc);
+               rc = bnxt_set_vnic_mru_p5(bp, vnic, mru);
+               if (rc)
                        return rc;
-               }
-               vnic->mru = bp->dev->mtu + ETH_HLEN + VLAN_HLEN;
-               bnxt_hwrm_vnic_update(bp, vnic,
-                                     VNIC_UPDATE_REQ_ENABLES_MRU_VALID);
        }
 
        return 0;
@@ -16013,9 +16029,8 @@ static int bnxt_queue_stop(struct net_device *dev, void *qmem, int idx)
 
        for (i = 0; i < bp->nr_vnics; i++) {
                vnic = &bp->vnic_info[i];
-               vnic->mru = 0;
-               bnxt_hwrm_vnic_update(bp, vnic,
-                                     VNIC_UPDATE_REQ_ENABLES_MRU_VALID);
+
+               bnxt_set_vnic_mru_p5(bp, vnic, 0);
        }
        /* Make sure NAPI sees that the VNIC is disabled */
        synchronize_net();