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net: systemport: Simplify queue mapping logic 

The use of a bitmap speeds up the finding of the first available queue
to which we could start establishing the mapping for, but we still have
to loop over all slave network devices to set them up. Simplify the
logic to have a single loop, and use the fact that a correctly
configured ring has inspect set to true. This will make things simpler
to unwind during device unregistration.

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 2018-11-06 15:15:17 -08:00 committed by David S. Miller
parent c04a17d2a9
commit 25c4407046
2 changed files with 9 additions and 9 deletions
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17
drivers/net/ethernet/broadcom/bcmsysport.c
View File

@ -2324,7 +2324,7 @@ static int bcm_sysport_map_queues(struct notifier_block *nb,
struct bcm_sysport_priv *priv;
struct net_device *slave_dev;
unsigned int num_tx_queues;
unsigned int q, start, port;
unsigned int q, qp, port;
struct net_device *dev;
priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
@ -2363,20 +2363,21 @@ static int bcm_sysport_map_queues(struct notifier_block *nb,
priv->per_port_num_tx_queues = num_tx_queues;
start = find_first_zero_bit(&priv->queue_bitmap, dev->num_tx_queues);
for (q = 0; q < num_tx_queues; q++) {
ring = &priv->tx_rings[q + start];
for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
q++) {
ring = &priv->tx_rings[q];
if (ring->inspect)
continue;
/* Just remember the mapping actual programming done
* during bcm_sysport_init_tx_ring
*/
ring->switch_queue = q;
ring->switch_queue = qp;
ring->switch_port = port;
ring->inspect = true;
priv->ring_map[q + port * num_tx_queues] = ring;
/* Set all queues as being used now */
set_bit(q + start, &priv->queue_bitmap);
qp++;
}
return 0;

1
drivers/net/ethernet/broadcom/bcmsysport.h
View File

@ -796,7 +796,6 @@ struct bcm_sysport_priv {
/* map information between switch port queues and local queues */
struct notifier_block dsa_notifier;
unsigned int per_port_num_tx_queues;
unsigned long queue_bitmap;
struct bcm_sysport_tx_ring *ring_map[DSA_MAX_PORTS * 8];
};