[dpdk-dev] [PATCH v3] net/tap: remove queue specific offload support

[Ferruh Yigit <ferruh.yigit@intel.com>]

It is not clear if tap PMD supports queue specific offloads, removing
the related code.

Fixes: 95ae196ae10b ("net/tap: use new Rx offloads API")
Fixes: 818fe14a9891 ("net/tap: use new Tx offloads API")
Cc: motih@mellanox.com

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
---
Cc: Ophir Munk <ophirmu@mellanox.com>

v2:
* rebased

v3:
* txq->csum restored,
  - ETH_TXQ_FLAGS_IGNORE check removed since ethdev layer takes care of it
  - tx_conf != NULL check removed, this is internal api who calls this is
  ethdev and it doesn't pass null tx_conf
---
 drivers/net/tap/rte_eth_tap.c | 102 +++++-------------------------------------
 1 file changed, 10 insertions(+), 92 deletions(-)

diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index ef33aace9..61b4b5df3 100644
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -278,31 +278,6 @@ tap_rx_offload_get_port_capa(void)
 	       DEV_RX_OFFLOAD_CRC_STRIP;
 }
 
-static uint64_t
-tap_rx_offload_get_queue_capa(void)
-{
-	return DEV_RX_OFFLOAD_SCATTER |
-	       DEV_RX_OFFLOAD_IPV4_CKSUM |
-	       DEV_RX_OFFLOAD_UDP_CKSUM |
-	       DEV_RX_OFFLOAD_TCP_CKSUM |
-	       DEV_RX_OFFLOAD_CRC_STRIP;
-}
-
-static bool
-tap_rxq_are_offloads_valid(struct rte_eth_dev *dev, uint64_t offloads)
-{
-	uint64_t port_offloads = dev->data->dev_conf.rxmode.offloads;
-	uint64_t queue_supp_offloads = tap_rx_offload_get_queue_capa();
-	uint64_t port_supp_offloads = tap_rx_offload_get_port_capa();
-
-	if ((offloads & (queue_supp_offloads | port_supp_offloads)) !=
-	    offloads)
-		return false;
-	if ((port_offloads ^ offloads) & port_supp_offloads)
-		return false;
-	return true;
-}
-
 /* Callback to handle the rx burst of packets to the correct interface and
  * file descriptor(s) in a multi-queue setup.
  */
@@ -411,31 +386,6 @@ tap_tx_offload_get_port_capa(void)
 	       DEV_TX_OFFLOAD_TCP_CKSUM;
 }
 
-static uint64_t
-tap_tx_offload_get_queue_capa(void)
-{
-	return DEV_TX_OFFLOAD_MULTI_SEGS |
-	       DEV_TX_OFFLOAD_IPV4_CKSUM |
-	       DEV_TX_OFFLOAD_UDP_CKSUM |
-	       DEV_TX_OFFLOAD_TCP_CKSUM;
-}
-
-static bool
-tap_txq_are_offloads_valid(struct rte_eth_dev *dev, uint64_t offloads)
-{
-	uint64_t port_offloads = dev->data->dev_conf.txmode.offloads;
-	uint64_t queue_supp_offloads = tap_tx_offload_get_queue_capa();
-	uint64_t port_supp_offloads = tap_tx_offload_get_port_capa();
-
-	if ((offloads & (queue_supp_offloads | port_supp_offloads)) !=
-	    offloads)
-		return false;
-	/* Verify we have no conflict with port offloads */
-	if ((port_offloads ^ offloads) & port_supp_offloads)
-		return false;
-	return true;
-}
-
 static void
 tap_tx_offload(char *packet, uint64_t ol_flags, unsigned int l2_len,
 	       unsigned int l3_len)
@@ -763,12 +713,10 @@ tap_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 	dev_info->max_tx_queues = RTE_PMD_TAP_MAX_QUEUES;
 	dev_info->min_rx_bufsize = 0;
 	dev_info->speed_capa = tap_dev_speed_capa();
-	dev_info->rx_queue_offload_capa = tap_rx_offload_get_queue_capa();
-	dev_info->rx_offload_capa = tap_rx_offload_get_port_capa() |
-				    dev_info->rx_queue_offload_capa;
-	dev_info->tx_queue_offload_capa = tap_tx_offload_get_queue_capa();
-	dev_info->tx_offload_capa = tap_tx_offload_get_port_capa() |
-				    dev_info->tx_queue_offload_capa;
+	dev_info->rx_offload_capa = tap_rx_offload_get_port_capa();
+	dev_info->tx_offload_capa = tap_tx_offload_get_port_capa();
+	dev_info->rx_queue_offload_capa = 0;
+	dev_info->tx_queue_offload_capa = 0;
 }
 
 static int
@@ -1094,19 +1042,6 @@ tap_rx_queue_setup(struct rte_eth_dev *dev,
 		return -1;
 	}
 
-	/* Verify application offloads are valid for our port and queue. */
-	if (!tap_rxq_are_offloads_valid(dev, rx_conf->offloads)) {
-		rte_errno = ENOTSUP;
-		RTE_LOG(ERR, PMD,
-			"%p: Rx queue offloads 0x%" PRIx64
-			" don't match port offloads 0x%" PRIx64
-			" or supported offloads 0x%" PRIx64 "\n",
-			(void *)dev, rx_conf->offloads,
-			dev->data->dev_conf.rxmode.offloads,
-			(tap_rx_offload_get_port_capa() |
-			 tap_rx_offload_get_queue_capa()));
-		return -rte_errno;
-	}
 	rxq->mp = mp;
 	rxq->trigger_seen = 1; /* force initial burst */
 	rxq->in_port = dev->data->port_id;
@@ -1175,29 +1110,12 @@ tap_tx_queue_setup(struct rte_eth_dev *dev,
 		return -1;
 	dev->data->tx_queues[tx_queue_id] = &internals->txq[tx_queue_id];
 	txq = dev->data->tx_queues[tx_queue_id];
-	/*
-	 * Don't verify port offloads for application which
-	 * use the old API.
-	 */
-	if (tx_conf != NULL &&
-	    !!(tx_conf->txq_flags & ETH_TXQ_FLAGS_IGNORE)) {
-		if (tap_txq_are_offloads_valid(dev, tx_conf->offloads)) {
-			txq->csum = !!(tx_conf->offloads &
-					(DEV_TX_OFFLOAD_IPV4_CKSUM |
-					 DEV_TX_OFFLOAD_UDP_CKSUM |
-					 DEV_TX_OFFLOAD_TCP_CKSUM));
-		} else {
-			rte_errno = ENOTSUP;
-			RTE_LOG(ERR, PMD,
-				"%p: Tx queue offloads 0x%" PRIx64
-				" don't match port offloads 0x%" PRIx64
-				" or supported offloads 0x%" PRIx64,
-				(void *)dev, tx_conf->offloads,
-				dev->data->dev_conf.txmode.offloads,
-				tap_tx_offload_get_port_capa());
-			return -rte_errno;
-		}
-	}
+
+	txq->csum = !!(tx_conf->offloads &
+			(DEV_TX_OFFLOAD_IPV4_CKSUM |
+			 DEV_TX_OFFLOAD_UDP_CKSUM |
+			 DEV_TX_OFFLOAD_TCP_CKSUM));
+
 	ret = tap_setup_queue(dev, internals, tx_queue_id, 0);
 	if (ret == -1)
 		return -1;
-- 
2.14.3