netdev - [PATCH net-next 4/9] bnxt_en: Deprecate support for legacy INTX mode

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Message-ID: <20240713234339.70293-5-michael.chan@broadcom.com>
Date: Sat, 13 Jul 2024 16:43:34 -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,
	Hongguang Gao <hongguang.gao@...adcom.com>,
	Kalesh AP <kalesh-anakkur.purayil@...adcom.com>,
	Somnath Kotur <somnath.kotur@...adcom.com>
Subject: [PATCH net-next 4/9] bnxt_en: Deprecate support for legacy INTX mode

Firmware has deprecated support for legacy INTX in 2022 and INTX hasn't
been tested for many years before that.  If MSIX capability is not
found in probe, abort.

Reviewed-by: Hongguang Gao <hongguang.gao@...adcom.com>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@...adcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 41 ++++-------------------
 drivers/net/ethernet/broadcom/bnxt/bnxt.h |  1 -
 2 files changed, 7 insertions(+), 35 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 4f9d9a1d9c88..7599fc3f8e27 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -10745,7 +10745,7 @@ static int bnxt_get_num_msix(struct bnxt *bp)
 	return bnxt_nq_rings_in_use(bp);
 }
 
-static int bnxt_init_msix(struct bnxt *bp)
+static int bnxt_init_int_mode(struct bnxt *bp)
 {
 	int i, total_vecs, max, rc = 0, min = 1, ulp_msix, tx_cp;
 	struct msix_entry *msix_ent;
@@ -10803,7 +10803,7 @@ static int bnxt_init_msix(struct bnxt *bp)
 	return 0;
 
 msix_setup_exit:
-	netdev_err(bp->dev, "bnxt_init_msix err: %x\n", rc);
+	netdev_err(bp->dev, "bnxt_init_int_mode err: %x\n", rc);
 	kfree(bp->irq_tbl);
 	bp->irq_tbl = NULL;
 	pci_disable_msix(bp->pdev);
@@ -10811,35 +10811,6 @@ static int bnxt_init_msix(struct bnxt *bp)
 	return rc;
 }
 
-static int bnxt_init_inta(struct bnxt *bp)
-{
-	bp->irq_tbl = kzalloc(sizeof(struct bnxt_irq), GFP_KERNEL);
-	if (!bp->irq_tbl)
-		return -ENOMEM;
-
-	bp->total_irqs = 1;
-	bp->rx_nr_rings = 1;
-	bp->tx_nr_rings = 1;
-	bp->cp_nr_rings = 1;
-	bp->flags |= BNXT_FLAG_SHARED_RINGS;
-	bp->irq_tbl[0].vector = bp->pdev->irq;
-	return 0;
-}
-
-static int bnxt_init_int_mode(struct bnxt *bp)
-{
-	int rc = -ENODEV;
-
-	if (bp->flags & BNXT_FLAG_MSIX_CAP)
-		rc = bnxt_init_msix(bp);
-
-	if (!(bp->flags & BNXT_FLAG_USING_MSIX) && BNXT_PF(bp)) {
-		/* fallback to INTA */
-		rc = bnxt_init_inta(bp);
-	}
-	return rc;
-}
-
 static void bnxt_clear_int_mode(struct bnxt *bp)
 {
 	if (bp->flags & BNXT_FLAG_USING_MSIX)
@@ -12885,7 +12856,7 @@ bool bnxt_rfs_capable(struct bnxt *bp, bool new_rss_ctx)
 	    !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)
+	if (!bnxt_can_reserve_rings(bp) || !bp->rx_nr_rings)
 		return false;
 
 	hwr.grp = bp->rx_nr_rings;
@@ -15743,8 +15714,10 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (BNXT_PF(bp))
 		SET_NETDEV_DEVLINK_PORT(dev, &bp->dl_port);
 
-	if (pdev->msix_cap)
-		bp->flags |= BNXT_FLAG_MSIX_CAP;
+	if (!pdev->msix_cap) {
+		dev_err(&pdev->dev, "MSIX capability not found, aborting\n");
+		return -ENODEV;
+	}
 
 	rc = bnxt_init_board(pdev, dev);
 	if (rc < 0)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index af4d9bb947b3..06030244d740 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -2199,7 +2199,6 @@ struct bnxt {
 	#define BNXT_FLAG_AGG_RINGS	(BNXT_FLAG_JUMBO | BNXT_FLAG_GRO | \
 					 BNXT_FLAG_LRO)
 	#define BNXT_FLAG_USING_MSIX	0x40
-	#define BNXT_FLAG_MSIX_CAP	0x80
 	#define BNXT_FLAG_RFS		0x100
 	#define BNXT_FLAG_SHARED_RINGS	0x200
 	#define BNXT_FLAG_PORT_STATS	0x400
-- 
2.30.1


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