[dpdk-dev] [PATCH 1/2] ethdev: avoid explicit check of valid port state

[Thomas Monjalon <thomas@monjalon.net>]

Some port iterations are manually checking against RTE_ETH_DEV_UNUSED
instead of using the iterators based on rte_eth_find_next().

A new macro RTE_ETH_FOREACH_VALID_DEV() is introduced, but kept private
because there should be no need of iterating over all devices in the API.
The public iterators have additional filters for ownership, parent device
or sibling ports.

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
---
 drivers/net/mlx5/mlx5.c        |  9 ++-------
 lib/librte_ethdev/rte_ethdev.c | 25 ++++++++++++-------------
 2 files changed, 14 insertions(+), 20 deletions(-)

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index 9ff50dfbe..4deaada5c 100644
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -1964,14 +1964,9 @@ static int
 mlx5_pci_remove(struct rte_pci_device *pci_dev)
 {
 	uint16_t port_id;
-	struct rte_eth_dev *port;
 
-	for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++) {
-		port = &rte_eth_devices[port_id];
-		if (port->state != RTE_ETH_DEV_UNUSED &&
-				port->device == &pci_dev->device)
-			rte_eth_dev_close(port_id);
-	}
+	RTE_ETH_FOREACH_DEV_OF(port_id, &pci_dev->device)
+		rte_eth_dev_close(port_id);
 	return 0;
 }
 
diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index 243beb4dd..cca15efca 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -339,6 +339,11 @@ rte_eth_find_next(uint16_t port_id)
 	return port_id;
 }
 
+#define RTE_ETH_FOREACH_VALID_DEV(port_id) \
+	for (port_id = rte_eth_find_next(0); \
+	     port_id < RTE_MAX_ETHPORTS; \
+	     port_id = rte_eth_find_next(port_id + 1))
+
 uint16_t
 rte_eth_find_next_of(uint16_t port_id, const struct rte_device *parent)
 {
@@ -584,13 +589,10 @@ rte_eth_is_valid_owner_id(uint64_t owner_id)
 uint64_t
 rte_eth_find_next_owned_by(uint16_t port_id, const uint64_t owner_id)
 {
+	port_id = rte_eth_find_next(port_id);
 	while (port_id < RTE_MAX_ETHPORTS &&
-	       (rte_eth_devices[port_id].state == RTE_ETH_DEV_UNUSED ||
-	       rte_eth_devices[port_id].data->owner.id != owner_id))
-		port_id++;
-
-	if (port_id >= RTE_MAX_ETHPORTS)
-		return RTE_MAX_ETHPORTS;
+			rte_eth_devices[port_id].data->owner.id != owner_id)
+		port_id = rte_eth_find_next(port_id + 1);
 
 	return port_id;
 }
@@ -768,9 +770,8 @@ rte_eth_dev_count_total(void)
 {
 	uint16_t port, count = 0;
 
-	for (port = 0; port < RTE_MAX_ETHPORTS; port++)
-		if (rte_eth_devices[port].state != RTE_ETH_DEV_UNUSED)
-			count++;
+	RTE_ETH_FOREACH_VALID_DEV(port)
+		count++;
 
 	return count;
 }
@@ -804,13 +805,11 @@ rte_eth_dev_get_port_by_name(const char *name, uint16_t *port_id)
 		return -EINVAL;
 	}
 
-	for (pid = 0; pid < RTE_MAX_ETHPORTS; pid++) {
-		if (rte_eth_devices[pid].state != RTE_ETH_DEV_UNUSED &&
-		    !strcmp(name, rte_eth_dev_shared_data->data[pid].name)) {
+	RTE_ETH_FOREACH_VALID_DEV(pid)
+		if (!strcmp(name, rte_eth_dev_shared_data->data[pid].name)) {
 			*port_id = pid;
 			return 0;
 		}
-	}
 
 	return -ENODEV;
 }
-- 
2.21.0