From f10d528250cd9f698778f3c4c6cb771479d8a3fa Mon Sep 17 00:00:00 2001
From: Ajit Khaparde <ajit.khaparde@broadcom.com>
Date: Mon, 8 Jan 2018 12:24:37 -0800
Subject: [PATCH] net/bnxt: check on-chip resources

Check for availability of on-chip resources - like Queue count,
number stat context, number of ring groups before inheriting and
initializing as per application requirements.
Also check before creating a Tx or Rx queue make sure there are
enough resources to complete the request.

Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
---
 drivers/net/bnxt/bnxt_ethdev.c | 20 ++++++++++++++++++++
 drivers/net/bnxt/bnxt_rxq.c    |  7 +++++++
 drivers/net/bnxt/bnxt_txq.c    |  7 +++++++
 3 files changed, 34 insertions(+)

diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 41b23cc4f5..36c01fa694 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -530,6 +530,26 @@ static int bnxt_dev_configure_op(struct rte_eth_dev *eth_dev)
 	bp->tx_queues = (void *)eth_dev->data->tx_queues;
 
 	/* Inherit new configurations */
+	if (eth_dev->data->nb_rx_queues > bp->max_rx_rings ||
+	    eth_dev->data->nb_tx_queues > bp->max_tx_rings ||
+	    eth_dev->data->nb_rx_queues + eth_dev->data->nb_tx_queues + 1 >
+	    bp->max_cp_rings ||
+	    eth_dev->data->nb_rx_queues + eth_dev->data->nb_tx_queues >
+	    bp->max_stat_ctx ||
+	    (uint32_t)(eth_dev->data->nb_rx_queues + 1) > bp->max_ring_grps) {
+		RTE_LOG(ERR, PMD,
+			"Insufficient resources to support requested config\n");
+		RTE_LOG(ERR, PMD,
+			"Num Queues Requested: Tx %d, Rx %d\n",
+			eth_dev->data->nb_tx_queues,
+			eth_dev->data->nb_rx_queues);
+		RTE_LOG(ERR, PMD,
+			"Res available: TxQ %d, RxQ %d, CQ %d Stat %d, Grp %d\n",
+			bp->max_tx_rings, bp->max_rx_rings, bp->max_cp_rings,
+			bp->max_stat_ctx, bp->max_ring_grps);
+		return -ENOSPC;
+	}
+
 	bp->rx_nr_rings = eth_dev->data->nb_rx_queues;
 	bp->tx_nr_rings = eth_dev->data->nb_tx_queues;
 	bp->rx_cp_nr_rings = bp->rx_nr_rings;
diff --git a/drivers/net/bnxt/bnxt_rxq.c b/drivers/net/bnxt/bnxt_rxq.c
index c4da474e91..f7fbb28561 100644
--- a/drivers/net/bnxt/bnxt_rxq.c
+++ b/drivers/net/bnxt/bnxt_rxq.c
@@ -311,6 +311,13 @@ int bnxt_rx_queue_setup_op(struct rte_eth_dev *eth_dev,
 	struct bnxt_rx_queue *rxq;
 	int rc = 0;
 
+	if (queue_idx >= bp->max_rx_rings) {
+		RTE_LOG(ERR, PMD,
+			"Cannot create Rx ring %d. Only %d rings available\n",
+			queue_idx, bp->max_rx_rings);
+		return -ENOSPC;
+	}
+
 	if (!nb_desc || nb_desc > MAX_RX_DESC_CNT) {
 		RTE_LOG(ERR, PMD, "nb_desc %d is invalid\n", nb_desc);
 		rc = -EINVAL;
diff --git a/drivers/net/bnxt/bnxt_txq.c b/drivers/net/bnxt/bnxt_txq.c
index 99dddddfc5..25c33f5e43 100644
--- a/drivers/net/bnxt/bnxt_txq.c
+++ b/drivers/net/bnxt/bnxt_txq.c
@@ -108,6 +108,13 @@ int bnxt_tx_queue_setup_op(struct rte_eth_dev *eth_dev,
 	struct bnxt_tx_queue *txq;
 	int rc = 0;
 
+	if (queue_idx >= bp->max_tx_rings) {
+		RTE_LOG(ERR, PMD,
+			"Cannot create Tx ring %d. Only %d rings available\n",
+			queue_idx, bp->max_tx_rings);
+		return -ENOSPC;
+	}
+
 	if (!nb_desc || nb_desc > MAX_TX_DESC_CNT) {
 		RTE_LOG(ERR, PMD, "nb_desc %d is invalid", nb_desc);
 		rc = -EINVAL;