net: dsa: Allow switch drivers to indicate number of TX queues (55199df6) · Commits · 戴 / test

Let switch drivers indicate how many TX queues they support. Some switches, such as Broadcom Starfighter 2 are designed with 8 egress queues. Future changes will allow us to leverage the queue mapping and direct the transmission towards a particular queue. Signed-off-by:

Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

include/net/dsa.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -243,6 +243,9 @@ struct dsa_switch {
		/* devlink used to represent this switch device */
		struct devlink *devlink;

		/* Number of switch port queues */
		unsigned int num_tx_queues;

		/* Dynamically allocated ports, keep last */
		size_t num_ports;
		struct dsa_port ports[];

net/dsa/slave.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -1259,8 +1259,12 @@ int dsa_slave_create(struct dsa_port port, const char name)
		cpu_dp = ds->dst->cpu_dp;
		master = cpu_dp->netdev;

		slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
		NET_NAME_UNKNOWN, ether_setup);
		if (!ds->num_tx_queues)
		ds->num_tx_queues = 1;

		slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
		NET_NAME_UNKNOWN, ether_setup,
		ds->num_tx_queues, 1);
		if (slave_dev == NULL)
		return -ENOMEM;

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