From: Michael Chan <michael.chan@broadcom.com>
Date: Sun, 14 Oct 2018 07:02:47 -0400
Subject: bnxt_en: Adjust MSIX and ring groups for 57500 series chips.
Patch-mainline: v4.20-rc1
Git-commit: 9c1fabdf424f27370790f1e0868b35cf63b70981
References: bsc#1104745 FATE#325918

Store the maximum MSIX capability in PCIe config. space earlier.  When
we call firmware to query capability, we need to compare the PCIe
MSIX max count with the firmware count and use the smaller one as
the MSIX count for 57500 (P5) chips.

The new chips don't use ring groups.  But previous chips do and
the existing logic limits the available rings based on resource
calculations including ring groups.  Setting the max ring groups to
the max rx rings will work on the new chips without changing the
existing logic.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -5677,6 +5677,13 @@ int bnxt_hwrm_func_resc_qcaps(struct bnx
 	hw_resc->min_stat_ctxs = le16_to_cpu(resp->min_stat_ctx);
 	hw_resc->max_stat_ctxs = le16_to_cpu(resp->max_stat_ctx);
 
+	if (bp->flags & BNXT_FLAG_CHIP_P5) {
+		u16 max_msix = le16_to_cpu(resp->max_msix);
+
+		hw_resc->max_irqs = min_t(u16, hw_resc->max_irqs, max_msix);
+		hw_resc->max_hw_ring_grps = hw_resc->max_rx_rings;
+	}
+
 	if (BNXT_PF(bp)) {
 		struct bnxt_pf_info *pf = &bp->pf;
 
@@ -9382,6 +9389,7 @@ static int bnxt_init_one(struct pci_dev
 		return -ENOMEM;
 
 	bp = netdev_priv(dev);
+	bnxt_set_max_func_irqs(bp, max_irqs);
 
 	if (bnxt_vf_pciid(ent->driver_data))
 		bp->flags |= BNXT_FLAG_VF;
@@ -9513,7 +9521,6 @@ static int bnxt_init_one(struct pci_dev
 	bnxt_set_rx_skb_mode(bp, false);
 	bnxt_set_tpa_flags(bp);
 	bnxt_set_ring_params(bp);
-	bnxt_set_max_func_irqs(bp, max_irqs);
 	rc = bnxt_set_dflt_rings(bp, true);
 	if (rc) {
 		netdev_err(bp->dev, "Not enough rings available.\n");