bnxt_en: Store the maximum NQs available on the PF.

The PF has a pool of NQs and MSIX vectors assigned to it based on
NVRAM configurations.  The number of usable MSIX vectors on the PF
is the minimum of the NQs and MSIX vectors.  Any excess NQs without
associated MSIX may be used for the VFs, so we need to store this
max_nqs value.  max_nqs minus the NQs used by the PF will be the
available NQs for the VFs.
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -6221,7 +6221,7 @@ int bnxt_hwrm_func_resc_qcaps(struct bnxt *bp, bool all)
 	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_nqs = max_msix;
 		hw_resc->max_hw_ring_grps = hw_resc->max_rx_rings;
 	}
 
@@ -7059,6 +7059,9 @@ static unsigned int bnxt_get_max_func_irqs(struct bnxt *bp)
 {
 	struct bnxt_hw_resc *hw_resc = &bp->hw_resc;
 
+	if (bp->flags & BNXT_FLAG_CHIP_P5)
+		return min_t(unsigned int, hw_resc->max_irqs, hw_resc->max_nqs);
+
 	return min_t(unsigned int, hw_resc->max_irqs, hw_resc->max_cp_rings);
 }
 

drivers/net/ethernet/broadcom/bnxt/bnxt.h

@@ -927,6 +927,7 @@ struct bnxt_hw_resc {
 	u16	resv_vnics;
 	u16	min_stat_ctxs;
 	u16	max_stat_ctxs;
+	u16	max_nqs;
 	u16	max_irqs;
 	u16	resv_irqs;
 };