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net: dsa: Allow switch drivers to indicate number of TX queues 

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>
This commit is contained in:
Florian Fainelli 2017-09-03 20:27:00 -07:00 committed by David S. Miller
parent f1c2eddf4c
commit 55199df6d2
2 changed files with 9 additions and 2 deletions
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3
include/net/dsa.h
View File

@ -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[];

8
net/dsa/slave.c
View File

@ -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;