netdev - [PATCH net-next 07/12] bnxt_en: Simplify bnxt_rfs

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Message-Id: <20240325222902.220712-8-michael.chan@broadcom.com>
Date: Mon, 25 Mar 2024 15:28:57 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	pavan.chebbi@...adcom.com,
	andrew.gospodarek@...adcom.com
Subject: [PATCH net-next 07/12] bnxt_en: Simplify bnxt_rfs_capable()

bnxt_rfs_capable() determines the number of VNICs and RSS_CTXs
required to support aRFS and then reserves the resources.  We already
have functions bnxt_get_total_vnics() and bnxt_get_total_rss_ctxs()
to do that.  Simplify the code by calling these functions.  It is
also more correct to do the resource reservation after
bnxt_can_reserve_rings() returns true.

Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 80ccb5a54dae..e968684ccb1d 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -12479,28 +12479,19 @@ static bool bnxt_rfs_capable(struct bnxt *bp)
 	struct bnxt_hw_rings hwr = {0};
 	int max_vnics, max_rss_ctxs;
 
-	hwr.rss_ctx = 1;
-	if (BNXT_SUPPORTS_NTUPLE_VNIC(bp)) {
-		/* 2 VNICS: default + Ntuple */
-		hwr.vnic = 2;
-		hwr.rss_ctx = bnxt_get_nr_rss_ctxs(bp, bp->rx_nr_rings) *
-			      hwr.vnic;
-		goto check_reserve_vnic;
-	}
-	if (bp->flags & BNXT_FLAG_CHIP_P5_PLUS)
+	if ((bp->flags & BNXT_FLAG_CHIP_P5_PLUS) &&
+	    !BNXT_SUPPORTS_NTUPLE_VNIC(bp))
 		return bnxt_rfs_supported(bp);
+
 	if (!(bp->flags & BNXT_FLAG_MSIX_CAP) || !bnxt_can_reserve_rings(bp) || !bp->rx_nr_rings)
 		return false;
 
-	hwr.vnic = 1 + bp->rx_nr_rings;
-check_reserve_vnic:
+	hwr.grp = bp->rx_nr_rings;
+	hwr.vnic = bnxt_get_total_vnics(bp, bp->rx_nr_rings);
+	hwr.rss_ctx = bnxt_get_total_rss_ctxs(bp, &hwr);
 	max_vnics = bnxt_get_max_func_vnics(bp);
 	max_rss_ctxs = bnxt_get_max_func_rss_ctxs(bp);
 
-	if (!(bp->flags & BNXT_FLAG_CHIP_P5_PLUS) &&
-	    !(bp->rss_cap & BNXT_RSS_CAP_NEW_RSS_CAP))
-		hwr.rss_ctx = hwr.vnic;
-
 	if (hwr.vnic > max_vnics || hwr.rss_ctx > max_rss_ctxs) {
 		if (bp->rx_nr_rings > 1)
 			netdev_warn(bp->dev,
-- 
2.30.1


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