[dpdk-dev] [PATCH v2 1/8] ether: refine debug compile option

[Qi Zhang <qi.z.zhang@intel.com>]

PMDs use RTE_LIBRTE_<PMD_NAME>_DEBUG_RX|TX as compile option to wrap
data path debug code. As .config has been removed since the meson build,
It is not friendly for new DPDK users to notice those debug options.

The patch introduces below compile options for specific Rx/Tx data path
debug, so PMD can choose to reuse them to avoid maintain their own.

- RTE_LIBRTE_ETHDEV_DEBUG_RX
- RTE_LIBRTE_ETHDEV_DEBUG_TX

Also, all the compile options are documented on the overview page, so
users can easily find them.

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
---
 doc/guides/nics/overview.rst   | 20 ++++++++++++++++++++
 lib/librte_ethdev/rte_ethdev.h | 16 ++++++++--------
 2 files changed, 28 insertions(+), 8 deletions(-)

diff --git a/doc/guides/nics/overview.rst b/doc/guides/nics/overview.rst
index 20cd52b097..20cf54ef32 100644
--- a/doc/guides/nics/overview.rst
+++ b/doc/guides/nics/overview.rst
@@ -32,3 +32,23 @@ More details about features can be found in :doc:`features`.
 
    Features marked with "P" are partially supported. Refer to the appropriate
    NIC guide in the following sections for details.
+
+The ethdev layer support below compile options for debug purpose:
+
+- ``RTE_LIBRTE_ETHDEV_DEBUG`` (default **disabled**)
+
+  Compile with debug code on data path.
+
+- ``RTE_LIBRTE_ETHDEV_DEBUG_RX`` (default **disabled**)
+
+  Compile with debug code on Rx data path.
+
+- ``RTE_LIBRTE_ETHDEV_DEBUG_TX`` (default **disabled**)
+
+  Compile with debug code on Tx data path.
+
+.. Note::
+
+   The lib_ethdev use above options to wrap debug code to trace invalid parameters on
+   data path APIs, so performance downgrade is expected when enable those options.
+   Each PMD can decide to reuse them to wrap their own debug code in the Rx/Tx path.
diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
index 059a061072..e4352c0c32 100644
--- a/lib/librte_ethdev/rte_ethdev.h
+++ b/lib/librte_ethdev/rte_ethdev.h
@@ -4877,7 +4877,7 @@ rte_eth_rx_burst(uint16_t port_id, uint16_t queue_id,
 	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
 	uint16_t nb_rx;
 
-#ifdef RTE_LIBRTE_ETHDEV_DEBUG
+#if defined(RTE_LIBRTE_ETHDEV_DEBUG) || defined(RTE_LIBRTE_ETHDEV_DEBUG_RX)
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, 0);
 	RTE_FUNC_PTR_OR_ERR_RET(*dev->rx_pkt_burst, 0);
 
@@ -5011,11 +5011,11 @@ rte_eth_rx_descriptor_status(uint16_t port_id, uint16_t queue_id,
 	struct rte_eth_dev *dev;
 	void *rxq;
 
-#ifdef RTE_LIBRTE_ETHDEV_DEBUG
+#if defined(RTE_LIBRTE_ETHDEV_DEBUG) || defined(RTE_LIBRTE_ETHDEV_DEBUG_RX)
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
 #endif
 	dev = &rte_eth_devices[port_id];
-#ifdef RTE_LIBRTE_ETHDEV_DEBUG
+#if defined(RTE_LIBRTE_ETHDEV_DEBUG) || defined(RTE_LIBRTE_ETHDEV_DEBUG_RX)
 	if (queue_id >= dev->data->nb_rx_queues)
 		return -ENODEV;
 #endif
@@ -5068,11 +5068,11 @@ static inline int rte_eth_tx_descriptor_status(uint16_t port_id,
 	struct rte_eth_dev *dev;
 	void *txq;
 
-#ifdef RTE_LIBRTE_ETHDEV_DEBUG
+#if defined(RTE_LIBRTE_ETHDEV_DEBUG) || defined(RTE_LIBRTE_ETHDEV_DEBUG_TX)
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
 #endif
 	dev = &rte_eth_devices[port_id];
-#ifdef RTE_LIBRTE_ETHDEV_DEBUG
+#if defined(RTE_LIBRTE_ETHDEV_DEBUG) || defined(RTE_LIBRTE_ETHDEV_DEBUG_TX)
 	if (queue_id >= dev->data->nb_tx_queues)
 		return -ENODEV;
 #endif
@@ -5154,7 +5154,7 @@ rte_eth_tx_burst(uint16_t port_id, uint16_t queue_id,
 {
 	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
 
-#ifdef RTE_LIBRTE_ETHDEV_DEBUG
+#if defined(RTE_LIBRTE_ETHDEV_DEBUG) || defined(RTE_LIBRTE_ETHDEV_DEBUG_TX)
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, 0);
 	RTE_FUNC_PTR_OR_ERR_RET(*dev->tx_pkt_burst, 0);
 
@@ -5252,7 +5252,7 @@ rte_eth_tx_prepare(uint16_t port_id, uint16_t queue_id,
 {
 	struct rte_eth_dev *dev;
 
-#ifdef RTE_LIBRTE_ETHDEV_DEBUG
+#if defined(RTE_LIBRTE_ETHDEV_DEBUG) || defined(RTE_LIBRTE_ETHDEV_DEBUG_TX)
 	if (!rte_eth_dev_is_valid_port(port_id)) {
 		RTE_ETHDEV_LOG(ERR, "Invalid TX port_id=%u\n", port_id);
 		rte_errno = ENODEV;
@@ -5262,7 +5262,7 @@ rte_eth_tx_prepare(uint16_t port_id, uint16_t queue_id,
 
 	dev = &rte_eth_devices[port_id];
 
-#ifdef RTE_LIBRTE_ETHDEV_DEBUG
+#if defined(RTE_LIBRTE_ETHDEV_DEBUG) || defined(RTE_LIBRTE_ETHDEV_DEBUG_TX)
 	if (queue_id >= dev->data->nb_tx_queues) {
 		RTE_ETHDEV_LOG(ERR, "Invalid TX queue_id=%u\n", queue_id);
 		rte_errno = EINVAL;
-- 
2.26.2