[dpdk-dev] [PATCH] net/octeontx2: fix driver reconfiguration

[<kkanas@marvell.com>]

From: Krzysztof Kanas <kkanas@marvell.com>

When configure returns error, e.g. in case not supported offloads (outer ip
and sctp) driver released Rx,Tx queues. Then in case of correct
configuration the driver could not start due to queues already released but
the driver thought it was configured correctly.

Secondly if driver returns error from configuration librte_ethdev will
release, rx queues and tx queues, without chaining driver configured state.

Fix that by 'releasing' configuration and changing driver state when error
is returned from otx2_nix_configure.

Fixes: 548b5839a32b ("net/octeontx2: add device configure operation")

Signed-off-by: Krzysztof Kanas <kkanas@marvell.com>
Reviewed-by: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
Reviewed-by: Nithin Kumar Dabilpuram <ndabilpuram@marvell.com>
---
 drivers/net/octeontx2/otx2_ethdev.c | 65 +++++++++++++++++------------
 1 file changed, 38 insertions(+), 27 deletions(-)

diff --git a/drivers/net/octeontx2/otx2_ethdev.c b/drivers/net/octeontx2/otx2_ethdev.c
index fcb1869d5871..e6f81c4c9fec 100644
--- a/drivers/net/octeontx2/otx2_ethdev.c
+++ b/drivers/net/octeontx2/otx2_ethdev.c
@@ -1185,38 +1185,46 @@ otx2_nix_configure(struct rte_eth_dev *eth_dev)
 	/* Sanity checks */
 	if (rte_eal_has_hugepages() == 0) {
 		otx2_err("Huge page is not configured");
-		goto fail;
+		goto fail_configure;
 	}
 
 	if (rte_eal_iova_mode() != RTE_IOVA_VA) {
 		otx2_err("iova mode should be va");
-		goto fail;
+		goto fail_configure;
 	}
 
 	if (conf->link_speeds & ETH_LINK_SPEED_FIXED) {
 		otx2_err("Setting link speed/duplex not supported");
-		goto fail;
+		goto fail_configure;
 	}
 
 	if (conf->dcb_capability_en == 1) {
 		otx2_err("dcb enable is not supported");
-		goto fail;
+		goto fail_configure;
 	}
 
 	if (conf->fdir_conf.mode != RTE_FDIR_MODE_NONE) {
 		otx2_err("Flow director is not supported");
-		goto fail;
+		goto fail_configure;
 	}
 
 	if (rxmode->mq_mode != ETH_MQ_RX_NONE &&
 	    rxmode->mq_mode != ETH_MQ_RX_RSS) {
 		otx2_err("Unsupported mq rx mode %d", rxmode->mq_mode);
-		goto fail;
+		goto fail_configure;
 	}
 
 	if (txmode->mq_mode != ETH_MQ_TX_NONE) {
 		otx2_err("Unsupported mq tx mode %d", txmode->mq_mode);
-		goto fail;
+		goto fail_configure;
+	}
+
+	if (otx2_dev_is_A0(dev) &&
+	    (txmode->offloads & DEV_TX_OFFLOAD_SCTP_CKSUM) &&
+	    ((txmode->offloads & DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
+	    (txmode->offloads & DEV_TX_OFFLOAD_OUTER_UDP_CKSUM))) {
+		otx2_err("Outer IP and SCTP checksum unsupported");
+		goto fail_configure;
 	}
 
 	/* Free the resources allocated from the previous configure */
@@ -1230,20 +1238,11 @@ otx2_nix_configure(struct rte_eth_dev *eth_dev)
 		nix_set_nop_rxtx_function(eth_dev);
 		rc = nix_store_queue_cfg_and_then_release(eth_dev);
 		if (rc)
-			goto fail;
+			goto fail_configure;
 		otx2_nix_tm_fini(eth_dev);
 		nix_lf_free(dev);
 	}
 
-	if (otx2_dev_is_Ax(dev) &&
-	    (txmode->offloads & DEV_TX_OFFLOAD_SCTP_CKSUM) &&
-	    ((txmode->offloads & DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
-	    (txmode->offloads & DEV_TX_OFFLOAD_OUTER_UDP_CKSUM))) {
-		otx2_err("Outer IP and SCTP checksum unsupported");
-		rc = -EINVAL;
-		goto fail;
-	}
-
 	dev->rx_offloads = rxmode->offloads;
 	dev->tx_offloads = txmode->offloads;
 	dev->rx_offload_flags |= nix_rx_offload_flags(eth_dev);
@@ -1257,7 +1256,7 @@ otx2_nix_configure(struct rte_eth_dev *eth_dev)
 	rc = nix_lf_alloc(dev, nb_rxq, nb_txq);
 	if (rc) {
 		otx2_err("Failed to init nix_lf rc=%d", rc);
-		goto fail;
+		goto fail_offloads;
 	}
 
 	/* Configure RSS */
@@ -1277,14 +1276,14 @@ otx2_nix_configure(struct rte_eth_dev *eth_dev)
 	rc = otx2_nix_vlan_offload_init(eth_dev);
 	if (rc) {
 		otx2_err("Failed to init vlan offload rc=%d", rc);
-		goto free_nix_lf;
+		goto tm_fini;
 	}
 
 	/* Register queue IRQs */
 	rc = oxt2_nix_register_queue_irqs(eth_dev);
 	if (rc) {
 		otx2_err("Failed to register queue interrupts rc=%d", rc);
-		goto free_nix_lf;
+		goto vlan_fini;
 	}
 
 	/* Register cq IRQs */
@@ -1292,7 +1291,7 @@ otx2_nix_configure(struct rte_eth_dev *eth_dev)
 		if (eth_dev->data->nb_rx_queues > dev->cints) {
 			otx2_err("Rx interrupt cannot be enabled, rxq > %d",
 				 dev->cints);
-			goto free_nix_lf;
+			goto q_irq_fini;
 		}
 		/* Rx interrupt feature cannot work with vector mode because,
 		 * vector mode doesn't process packets unless min 4 pkts are
@@ -1304,7 +1303,7 @@ otx2_nix_configure(struct rte_eth_dev *eth_dev)
 		rc = oxt2_nix_register_cq_irqs(eth_dev);
 		if (rc) {
 			otx2_err("Failed to register CQ interrupts rc=%d", rc);
-			goto free_nix_lf;
+			goto q_irq_fini;
 		}
 	}
 
@@ -1312,13 +1311,13 @@ otx2_nix_configure(struct rte_eth_dev *eth_dev)
 	rc = cgx_intlbk_enable(dev, eth_dev->data->dev_conf.lpbk_mode);
 	if (rc) {
 		otx2_err("Failed to configure cgx loop back mode rc=%d", rc);
-		goto free_nix_lf;
+		goto q_irq_fini;
 	}
 
 	rc = otx2_nix_rxchan_bpid_cfg(eth_dev, true);
 	if (rc) {
 		otx2_err("Failed to configure nix rx chan bpid cfg rc=%d", rc);
-		goto free_nix_lf;
+		goto q_irq_fini;
 	}
 
 	/* Enable PTP if it was requested by the app or if it is already
@@ -1338,7 +1337,7 @@ otx2_nix_configure(struct rte_eth_dev *eth_dev)
 	if (dev->configured == 1) {
 		rc = nix_restore_queue_cfg(eth_dev);
 		if (rc)
-			goto free_nix_lf;
+			goto cq_fini;
 	}
 
 	/* Update the mac address */
@@ -1362,9 +1361,21 @@ otx2_nix_configure(struct rte_eth_dev *eth_dev)
 	dev->configured_nb_tx_qs = data->nb_tx_queues;
 	return 0;
 
+cq_fini:
+	oxt2_nix_unregister_cq_irqs(eth_dev);
+q_irq_fini:
+	oxt2_nix_unregister_queue_irqs(eth_dev);
+vlan_fini:
+	otx2_nix_vlan_fini(eth_dev);
+tm_fini:
+	otx2_nix_tm_fini(eth_dev);
 free_nix_lf:
-	rc = nix_lf_free(dev);
-fail:
+	nix_lf_free(dev);
+fail_offloads:
+	dev->rx_offload_flags &= ~nix_rx_offload_flags(eth_dev);
+	dev->tx_offload_flags &= ~nix_tx_offload_flags(eth_dev);
+fail_configure:
+	dev->configured = 0;
 	return rc;
 }
 
-- 
2.21.0