[v7] ethdev: TEST support single queue per port

Message ID 20241024211133.1042791-1-mb@smartsharesystems.com (mailing list archive)
State Superseded, archived
Delegated to: Thomas Monjalon
Headers
Series [v7] ethdev: TEST support single queue per port |

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Commit Message

Morten Brørup Oct. 24, 2024, 9:11 p.m. UTC
Configuring one queue per port (#define RTE_MAX_QUEUES_PER_PORT 1) fails
compilation with e.g.:

../drivers/net/bnxt/bnxt_rxq.c: In function 'bnxt_rx_queue_stop':
../drivers/net/bnxt/bnxt_rxq.c:587:34: error: array subscript 1 is above array bounds of 'uint8_t[1]' {aka 'unsigned char[1]'} [-Werror=array-bounds=]
  587 |         dev->data->rx_queue_state[q_id] = RTE_ETH_QUEUE_STATE_STOPPED;
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
In file included from ../drivers/net/bnxt/bnxt.h:16,
                 from ../drivers/net/bnxt/bnxt_rxq.c:10:
../lib/ethdev/ethdev_driver.h:168:17: note: while referencing 'rx_queue_state'
  168 |         uint8_t rx_queue_state[RTE_MAX_QUEUES_PER_PORT];
      |                 ^~~~~~~~~~~~~~

Use the CI to test my ideas to fix this.

Signed-off-by: Morten Brørup <mb@smartsharesystems.com>
---
v7:
* Introduce __rte_assume(e) in rte_common.h, and use this instead.
v6:
* Use __attribute__((assume(i < RTE_MAX_QUEUES_PER_PORT))) where the
  indexing warning occurs, instead of pragma GCC optimize("no-peel-loops")
  for the entire function.
v5:
* Wrap GCC optimizer pragmas in if defined(RTE_TOOLCHAIN_GCC).
v4:
* Workaound GCC optimizer incorrectly throwing a warning in these network
  drivers:
  * bnxt
  * e1000
  * failsafe
  * hns3
v3:
* Fix net/ixgbe driver.
v2:
* Fix net/vmxnet3 driver.
---
 config/rte_config.h                  |  4 ++--
 drivers/net/bnxt/bnxt_ethdev.c       |  2 ++
 drivers/net/bnxt/bnxt_rxq.c          |  1 +
 drivers/net/e1000/igb_rxtx.c         |  2 ++
 drivers/net/failsafe/failsafe_ops.c  | 10 +++++++--
 drivers/net/hns3/hns3_rxtx.c         |  2 ++
 drivers/net/ixgbe/ixgbe_ethdev.c     |  3 ++-
 drivers/net/mana/tx.c                |  1 +
 drivers/net/vmxnet3/vmxnet3_ethdev.c | 32 +++++++++++++++++-----------
 lib/eal/include/rte_common.h         | 11 ++++++++++
 10 files changed, 51 insertions(+), 17 deletions(-)
  

Patch

diff --git a/config/rte_config.h b/config/rte_config.h
index fd6f8a2f1a..924192c71c 100644
--- a/config/rte_config.h
+++ b/config/rte_config.h
@@ -65,8 +65,8 @@ 
 #define RTE_MBUF_DEFAULT_MEMPOOL_OPS "ring_mp_mc"
 
 /* ether defines */
-#define RTE_MAX_QUEUES_PER_PORT 1024
-#define RTE_ETHDEV_QUEUE_STAT_CNTRS 16 /* max 256 */
+#define RTE_MAX_QUEUES_PER_PORT 1 /* default 1024 */
+#define RTE_ETHDEV_QUEUE_STAT_CNTRS 1 /* max 256, default 16 */
 #define RTE_ETHDEV_RXTX_CALLBACKS 1
 #define RTE_MAX_MULTI_HOST_CTRLS 4
 
diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 1f7c0d77d5..136e308437 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -910,6 +910,7 @@  static int bnxt_start_nic(struct bnxt *bp)
 		struct bnxt_rx_queue *rxq = bp->rx_queues[j];
 
 		if (!rxq->rx_deferred_start) {
+			__rte_assume(j < RTE_MAX_QUEUES_PER_PORT);
 			bp->eth_dev->data->rx_queue_state[j] =
 				RTE_ETH_QUEUE_STATE_STARTED;
 			rxq->rx_started = true;
@@ -930,6 +931,7 @@  static int bnxt_start_nic(struct bnxt *bp)
 		struct bnxt_tx_queue *txq = bp->tx_queues[j];
 
 		if (!txq->tx_deferred_start) {
+			__rte_assume(j < RTE_MAX_QUEUES_PER_PORT);
 			bp->eth_dev->data->tx_queue_state[j] =
 				RTE_ETH_QUEUE_STATE_STARTED;
 			txq->tx_started = true;
diff --git a/drivers/net/bnxt/bnxt_rxq.c b/drivers/net/bnxt/bnxt_rxq.c
index 1c25c57ca6..1651c26545 100644
--- a/drivers/net/bnxt/bnxt_rxq.c
+++ b/drivers/net/bnxt/bnxt_rxq.c
@@ -584,6 +584,7 @@  int bnxt_rx_queue_stop(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 		return -EINVAL;
 	}
 
+	__rte_assume(q_id < RTE_MAX_QUEUES_PER_PORT);
 	dev->data->rx_queue_state[q_id] = RTE_ETH_QUEUE_STATE_STOPPED;
 	rxq->rx_started = false;
 	PMD_DRV_LOG_LINE(DEBUG, "Rx queue stopped");
diff --git a/drivers/net/e1000/igb_rxtx.c b/drivers/net/e1000/igb_rxtx.c
index d61eaad2de..4276bb6d31 100644
--- a/drivers/net/e1000/igb_rxtx.c
+++ b/drivers/net/e1000/igb_rxtx.c
@@ -1868,6 +1868,7 @@  igb_dev_clear_queues(struct rte_eth_dev *dev)
 	struct igb_rx_queue *rxq;
 
 	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		__rte_assume(i < RTE_MAX_QUEUES_PER_PORT);
 		txq = dev->data->tx_queues[i];
 		if (txq != NULL) {
 			igb_tx_queue_release_mbufs(txq);
@@ -1877,6 +1878,7 @@  igb_dev_clear_queues(struct rte_eth_dev *dev)
 	}
 
 	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		__rte_assume(i < RTE_MAX_QUEUES_PER_PORT);
 		rxq = dev->data->rx_queues[i];
 		if (rxq != NULL) {
 			igb_rx_queue_release_mbufs(rxq);
diff --git a/drivers/net/failsafe/failsafe_ops.c b/drivers/net/failsafe/failsafe_ops.c
index 9c013e0419..5321c3385c 100644
--- a/drivers/net/failsafe/failsafe_ops.c
+++ b/drivers/net/failsafe/failsafe_ops.c
@@ -111,12 +111,14 @@  fs_set_queues_state_start(struct rte_eth_dev *dev)
 	uint16_t i;
 
 	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		__rte_assume(i < RTE_MAX_QUEUES_PER_PORT);
 		rxq = dev->data->rx_queues[i];
 		if (rxq != NULL && !rxq->info.conf.rx_deferred_start)
 			dev->data->rx_queue_state[i] =
 						RTE_ETH_QUEUE_STATE_STARTED;
 	}
 	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		__rte_assume(i < RTE_MAX_QUEUES_PER_PORT);
 		txq = dev->data->tx_queues[i];
 		if (txq != NULL && !txq->info.conf.tx_deferred_start)
 			dev->data->tx_queue_state[i] =
@@ -176,14 +178,18 @@  fs_set_queues_state_stop(struct rte_eth_dev *dev)
 {
 	uint16_t i;
 
-	for (i = 0; i < dev->data->nb_rx_queues; i++)
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		__rte_assume(i < RTE_MAX_QUEUES_PER_PORT);
 		if (dev->data->rx_queues[i] != NULL)
 			dev->data->rx_queue_state[i] =
 						RTE_ETH_QUEUE_STATE_STOPPED;
-	for (i = 0; i < dev->data->nb_tx_queues; i++)
+	}
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		__rte_assume(i < RTE_MAX_QUEUES_PER_PORT);
 		if (dev->data->tx_queues[i] != NULL)
 			dev->data->tx_queue_state[i] =
 						RTE_ETH_QUEUE_STATE_STOPPED;
+	}
 }
 
 static int
diff --git a/drivers/net/hns3/hns3_rxtx.c b/drivers/net/hns3/hns3_rxtx.c
index 5941b966e0..03bbbc435f 100644
--- a/drivers/net/hns3/hns3_rxtx.c
+++ b/drivers/net/hns3/hns3_rxtx.c
@@ -1309,6 +1309,7 @@  hns3_start_tqps(struct hns3_hw *hw)
 	hns3_enable_all_queues(hw, true);
 
 	for (i = 0; i < hw->data->nb_tx_queues; i++) {
+		__rte_assume(i < RTE_MAX_QUEUES_PER_PORT);
 		txq = hw->data->tx_queues[i];
 		if (txq->enabled)
 			hw->data->tx_queue_state[i] =
@@ -1316,6 +1317,7 @@  hns3_start_tqps(struct hns3_hw *hw)
 	}
 
 	for (i = 0; i < hw->data->nb_rx_queues; i++) {
+		__rte_assume(i < RTE_MAX_QUEUES_PER_PORT);
 		rxq = hw->data->rx_queues[i];
 		if (rxq->enabled)
 			hw->data->rx_queue_state[i] =
diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index ab37c37469..09d648af6d 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -3385,7 +3385,8 @@  ixgbe_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 	stats->opackets = hw_stats->gptc;
 	stats->obytes = hw_stats->gotc;
 
-	for (i = 0; i < IXGBE_QUEUE_STAT_COUNTERS; i++) {
+	for (i = 0; i < RTE_MIN_T(IXGBE_QUEUE_STAT_COUNTERS,
+			RTE_ETHDEV_QUEUE_STAT_CNTRS, typeof(i)); i++) {
 		stats->q_ipackets[i] = hw_stats->qprc[i];
 		stats->q_opackets[i] = hw_stats->qptc[i];
 		stats->q_ibytes[i] = hw_stats->qbrc[i];
diff --git a/drivers/net/mana/tx.c b/drivers/net/mana/tx.c
index 272a28bcba..40931ac027 100644
--- a/drivers/net/mana/tx.c
+++ b/drivers/net/mana/tx.c
@@ -154,6 +154,7 @@  mana_start_tx_queues(struct rte_eth_dev *dev)
 			txq->gdma_cq.count, txq->gdma_cq.size,
 			txq->gdma_cq.head);
 
+		__rte_assume(i < RTE_MAX_QUEUES_PER_PORT);
 		dev->data->tx_queue_state[i] = RTE_ETH_QUEUE_STATE_STARTED;
 	}
 
diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c b/drivers/net/vmxnet3/vmxnet3_ethdev.c
index 78fac63ab6..8a9bb452c6 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
@@ -1470,42 +1470,52 @@  vmxnet3_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 	struct vmxnet3_hw *hw = dev->data->dev_private;
 	struct UPT1_TxStats txStats;
 	struct UPT1_RxStats rxStats;
+	uint64_t packets, bytes;
 
 	VMXNET3_WRITE_BAR1_REG(hw, VMXNET3_REG_CMD, VMXNET3_CMD_GET_STATS);
 
 	for (i = 0; i < hw->num_tx_queues; i++) {
 		vmxnet3_tx_stats_get(hw, i, &txStats);
 
-		stats->q_opackets[i] = txStats.ucastPktsTxOK +
+		packets = txStats.ucastPktsTxOK +
 			txStats.mcastPktsTxOK +
 			txStats.bcastPktsTxOK;
 
-		stats->q_obytes[i] = txStats.ucastBytesTxOK +
+		bytes = txStats.ucastBytesTxOK +
 			txStats.mcastBytesTxOK +
 			txStats.bcastBytesTxOK;
 
-		stats->opackets += stats->q_opackets[i];
-		stats->obytes += stats->q_obytes[i];
+		stats->opackets += packets;
+		stats->obytes += bytes;
 		stats->oerrors += txStats.pktsTxError + txStats.pktsTxDiscard;
+
+		if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+			stats->q_opackets[i] = packets;
+			stats->q_obytes[i] = bytes;
+		}
 	}
 
 	for (i = 0; i < hw->num_rx_queues; i++) {
 		vmxnet3_rx_stats_get(hw, i, &rxStats);
 
-		stats->q_ipackets[i] = rxStats.ucastPktsRxOK +
+		packets = rxStats.ucastPktsRxOK +
 			rxStats.mcastPktsRxOK +
 			rxStats.bcastPktsRxOK;
 
-		stats->q_ibytes[i] = rxStats.ucastBytesRxOK +
+		bytes = rxStats.ucastBytesRxOK +
 			rxStats.mcastBytesRxOK +
 			rxStats.bcastBytesRxOK;
 
-		stats->ipackets += stats->q_ipackets[i];
-		stats->ibytes += stats->q_ibytes[i];
-
-		stats->q_errors[i] = rxStats.pktsRxError;
+		stats->ipackets += packets;
+		stats->ibytes += bytes;
 		stats->ierrors += rxStats.pktsRxError;
 		stats->imissed += rxStats.pktsRxOutOfBuf;
+
+		if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+			stats->q_ipackets[i] = packets;
+			stats->q_ibytes[i] = bytes;
+			stats->q_errors[i] = rxStats.pktsRxError;
+		}
 	}
 
 	return 0;
@@ -1521,8 +1531,6 @@  vmxnet3_dev_stats_reset(struct rte_eth_dev *dev)
 
 	VMXNET3_WRITE_BAR1_REG(hw, VMXNET3_REG_CMD, VMXNET3_CMD_GET_STATS);
 
-	RTE_BUILD_BUG_ON(RTE_ETHDEV_QUEUE_STAT_CNTRS < VMXNET3_MAX_TX_QUEUES);
-
 	for (i = 0; i < hw->num_tx_queues; i++) {
 		vmxnet3_hw_tx_stats_get(hw, i, &txStats);
 		memcpy(&hw->snapshot_tx_stats[i], &txStats,
diff --git a/lib/eal/include/rte_common.h b/lib/eal/include/rte_common.h
index c79f9ed319..2e741062fa 100644
--- a/lib/eal/include/rte_common.h
+++ b/lib/eal/include/rte_common.h
@@ -50,6 +50,17 @@  extern "C" {
 #define __rte_constant(e) __extension__(__builtin_constant_p(e))
 #endif
 
+/**
+ * Hint to the optimizer.
+ */
+#if defined(RTE_TOOLCHAIN_GCC)
+#define __rte_assume(e) __attribute__((assume(e)))
+#elif defined(RTE_TOOLCHAIN_CLANG)
+#define __rte_assume(e) __extension__(__builtin_assume(e))
+#else
+#define __rte_assume(e) do {} while (0)
+#endif
+
 /*
  * RTE_TOOLCHAIN_GCC is defined if the target is built with GCC,
  * while a host application (like pmdinfogen) may have another compiler.