[PATCH v4 02/10] ethdev: skip VMDq pools unless configured

[David Marchand <david.marchand@redhat.com>]

The mac_addr_add API describes that only the 0 pool should be passed
unless VMDq has been enabled, though there was no validation so far.
Add such a check, then cleanup the MAC related operations (adding,
removing, restoring).

As a side effect, the net/cnxk does not need to manually reset the
mac_pool_sel[] array.

Signed-off-by: David Marchand <david.marchand@redhat.com>
Acked-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
---
Changes since v3:
- updated doxygen comments,

Changes since v2:
- added an entry in release notes,
- fixed duplicate mac address handling for !vmdq,
- rewrote update of eth_dev_mac_restore to isolate the !vmdq case,

---
 doc/guides/rel_notes/release_26_07.rst |  2 +
 drivers/net/cnxk/cnxk_ethdev_ops.c     |  1 -
 lib/ethdev/rte_ethdev.c                | 52 ++++++++++++++++++--------
 lib/ethdev/rte_ethdev.h                |  2 +-
 4 files changed, 39 insertions(+), 18 deletions(-)

diff --git a/doc/guides/rel_notes/release_26_07.rst b/doc/guides/rel_notes/release_26_07.rst
index 5e9178d36b..8e4e02e587 100644
--- a/doc/guides/rel_notes/release_26_07.rst
+++ b/doc/guides/rel_notes/release_26_07.rst
@@ -319,6 +319,8 @@ API Changes
   * At port configuration time, the number of VMDq pools advertised by a driver is now used to
     validate VMDq related Rx and Tx modes (``RTE_ETH_MQ_RX_VMDQ_FLAG``, ``RTE_ETH_MQ_TX_VMDQ_DCB``,
     ``RTE_ETH_MQ_TX_VMDQ_ONLY``).
+  * A check was added in ``rte_eth_dev_mac_addr_add`` to validate that the ``pool`` parameter is 0
+    when VMDq is not configured.
 
 * **mlx5: promoted driver event and steering management APIs from experimental to stable.**
 
diff --git a/drivers/net/cnxk/cnxk_ethdev_ops.c b/drivers/net/cnxk/cnxk_ethdev_ops.c
index 0ea3d7e89f..c002a93fe1 100644
--- a/drivers/net/cnxk/cnxk_ethdev_ops.c
+++ b/drivers/net/cnxk/cnxk_ethdev_ops.c
@@ -1240,7 +1240,6 @@ cnxk_nix_mc_addr_list_configure(struct rte_eth_dev *eth_dev, struct rte_ether_ad
 		/* Update address in NIC data structure */
 		rte_ether_addr_copy(&mc_addr_set[i], &data->mac_addrs[j]);
 		rte_ether_addr_copy(&mc_addr_set[i], &dev->dmac_addrs[j]);
-		data->mac_pool_sel[j] = RTE_BIT64(0);
 	}
 
 	roc_nix_npc_promisc_ena_dis(nix, true);
diff --git a/lib/ethdev/rte_ethdev.c b/lib/ethdev/rte_ethdev.c
index 9e305d98c1..f20cc514a3 100644
--- a/lib/ethdev/rte_ethdev.c
+++ b/lib/ethdev/rte_ethdev.c
@@ -1677,7 +1677,7 @@ eth_dev_mac_restore(struct rte_eth_dev *dev,
 {
 	struct rte_ether_addr *addr;
 	uint16_t i;
-	uint32_t pool = 0;
+	uint32_t pool;
 	uint64_t pool_mask;
 
 	/* replay MAC address configuration including default MAC */
@@ -1685,9 +1685,11 @@ eth_dev_mac_restore(struct rte_eth_dev *dev,
 	if (dev->dev_ops->mac_addr_set != NULL)
 		dev->dev_ops->mac_addr_set(dev, addr);
 	else if (dev->dev_ops->mac_addr_add != NULL)
-		dev->dev_ops->mac_addr_add(dev, addr, 0, pool);
+		dev->dev_ops->mac_addr_add(dev, addr, 0, 0);
 
 	if (dev->dev_ops->mac_addr_add != NULL) {
+		bool vmdq = (dev->data->dev_conf.rxmode.mq_mode & RTE_ETH_MQ_RX_VMDQ_FLAG) != 0;
+
 		for (i = 1; i < dev_info->max_mac_addrs; i++) {
 			addr = &dev->data->mac_addrs[i];
 
@@ -1695,15 +1697,19 @@ eth_dev_mac_restore(struct rte_eth_dev *dev,
 			if (rte_is_zero_ether_addr(addr))
 				continue;
 
-			pool = 0;
-			pool_mask = dev->data->mac_pool_sel[i];
-
-			do {
-				if (pool_mask & UINT64_C(1))
-					dev->dev_ops->mac_addr_add(dev, addr, i, pool);
-				pool_mask >>= 1;
-				pool++;
-			} while (pool_mask);
+			if (!vmdq) {
+				dev->dev_ops->mac_addr_add(dev, addr, i, 0);
+			} else {
+				pool = 0;
+				pool_mask = dev->data->mac_pool_sel[i];
+
+				do {
+					if (pool_mask & UINT64_C(1))
+						dev->dev_ops->mac_addr_add(dev, addr, i, pool);
+					pool_mask >>= 1;
+					pool++;
+				} while (pool_mask);
+			}
 		}
 	}
 }
@@ -5414,8 +5420,9 @@ rte_eth_dev_mac_addr_add(uint16_t port_id, struct rte_ether_addr *addr,
 			uint32_t pool)
 {
 	struct rte_eth_dev *dev;
-	int index;
 	uint64_t pool_mask;
+	bool vmdq;
+	int index;
 	int ret;
 
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
@@ -5440,6 +5447,12 @@ rte_eth_dev_mac_addr_add(uint16_t port_id, struct rte_ether_addr *addr,
 		RTE_ETHDEV_LOG_LINE(ERR, "Pool ID must be 0-%d", RTE_ETH_64_POOLS - 1);
 		return -EINVAL;
 	}
+	vmdq = (dev->data->dev_conf.rxmode.mq_mode & RTE_ETH_MQ_RX_VMDQ_FLAG) != 0;
+	if (!vmdq && pool != 0) {
+		RTE_ETHDEV_LOG_LINE(ERR, "Port %u: VMDq is not configured (pool %d)",
+			port_id, pool);
+		return -EINVAL;
+	}
 
 	index = eth_dev_get_mac_addr_index(port_id, addr);
 	if (index < 0) {
@@ -5450,6 +5463,9 @@ rte_eth_dev_mac_addr_add(uint16_t port_id, struct rte_ether_addr *addr,
 			return -ENOSPC;
 		}
 	} else {
+		if (!vmdq)
+			return 0;
+
 		pool_mask = dev->data->mac_pool_sel[index];
 
 		/* Check if both MAC address and pool is already there, and do nothing */
@@ -5464,8 +5480,10 @@ rte_eth_dev_mac_addr_add(uint16_t port_id, struct rte_ether_addr *addr,
 		/* Update address in NIC data structure */
 		rte_ether_addr_copy(addr, &dev->data->mac_addrs[index]);
 
-		/* Update pool bitmap in NIC data structure */
-		dev->data->mac_pool_sel[index] |= RTE_BIT64(pool);
+		if (vmdq) {
+			/* Update pool bitmap in NIC data structure */
+			dev->data->mac_pool_sel[index] |= RTE_BIT64(pool);
+		}
 	}
 
 	ret = eth_err(port_id, ret);
@@ -5510,8 +5528,10 @@ rte_eth_dev_mac_addr_remove(uint16_t port_id, struct rte_ether_addr *addr)
 	/* Update address in NIC data structure */
 	rte_ether_addr_copy(&null_mac_addr, &dev->data->mac_addrs[index]);
 
-	/* reset pool bitmap */
-	dev->data->mac_pool_sel[index] = 0;
+	if ((dev->data->dev_conf.rxmode.mq_mode & RTE_ETH_MQ_RX_VMDQ_FLAG) != 0) {
+		/* reset pool bitmap */
+		dev->data->mac_pool_sel[index] = 0;
+	}
 
 	rte_ethdev_trace_mac_addr_remove(port_id, addr);
 
diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
index ee400b386f..e2a5ba1549 100644
--- a/lib/ethdev/rte_ethdev.h
+++ b/lib/ethdev/rte_ethdev.h
@@ -4636,7 +4636,7 @@ int rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
  *   - (-ENODEV) if *port* is invalid.
  *   - (-EIO) if device is removed.
  *   - (-ENOSPC) if no more MAC addresses can be added.
- *   - (-EINVAL) if MAC address is invalid.
+ *   - (-EINVAL) if MAC address is invalid or a non 0 pool was passed but VMDq is not enabled.
  */
 int rte_eth_dev_mac_addr_add(uint16_t port_id, struct rte_ether_addr *mac_addr,
 				uint32_t pool);
-- 
2.54.0