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authorTom Herbert <therbert@google.com>2011-01-09 19:36:31 +0000
committerDavid S. Miller <davem@davemloft.net>2011-01-10 16:05:30 -0800
commit36909ea43814cba34f7c921e99cba33d770a54e1 (patch)
tree294b44411dc7939e152aa1002f9f5fe9868751f6 /net/core
parent91b5c98c2e062f982423686c77b8bf31f37fa196 (diff)
net: Add alloc_netdev_mqs function
Added alloc_netdev_mqs function which allows the number of transmit and receive queues to be specified independenty. alloc_netdev_mq was changed to a macro to call the new function. Also added alloc_etherdev_mqs with same purpose. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/dev.c32
1 files changed, 21 insertions, 11 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 3fe443be4b1..3295b94884a 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5617,18 +5617,20 @@ struct netdev_queue *dev_ingress_queue_create(struct net_device *dev)
}
/**
- * alloc_netdev_mq - allocate network device
+ * alloc_netdev_mqs - allocate network device
* @sizeof_priv: size of private data to allocate space for
* @name: device name format string
* @setup: callback to initialize device
- * @queue_count: the number of subqueues to allocate
+ * @txqs: the number of TX subqueues to allocate
+ * @rxqs: the number of RX subqueues to allocate
*
* Allocates a struct net_device with private data area for driver use
* and performs basic initialization. Also allocates subquue structs
- * for each queue on the device at the end of the netdevice.
+ * for each queue on the device.
*/
-struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
- void (*setup)(struct net_device *), unsigned int queue_count)
+struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
+ void (*setup)(struct net_device *),
+ unsigned int txqs, unsigned int rxqs)
{
struct net_device *dev;
size_t alloc_size;
@@ -5636,12 +5638,20 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
BUG_ON(strlen(name) >= sizeof(dev->name));
- if (queue_count < 1) {
+ if (txqs < 1) {
pr_err("alloc_netdev: Unable to allocate device "
"with zero queues.\n");
return NULL;
}
+#ifdef CONFIG_RPS
+ if (rxqs < 1) {
+ pr_err("alloc_netdev: Unable to allocate device "
+ "with zero RX queues.\n");
+ return NULL;
+ }
+#endif
+
alloc_size = sizeof(struct net_device);
if (sizeof_priv) {
/* ensure 32-byte alignment of private area */
@@ -5672,14 +5682,14 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
dev_net_set(dev, &init_net);
- dev->num_tx_queues = queue_count;
- dev->real_num_tx_queues = queue_count;
+ dev->num_tx_queues = txqs;
+ dev->real_num_tx_queues = txqs;
if (netif_alloc_netdev_queues(dev))
goto free_pcpu;
#ifdef CONFIG_RPS
- dev->num_rx_queues = queue_count;
- dev->real_num_rx_queues = queue_count;
+ dev->num_rx_queues = rxqs;
+ dev->real_num_rx_queues = rxqs;
if (netif_alloc_rx_queues(dev))
goto free_pcpu;
#endif
@@ -5707,7 +5717,7 @@ free_p:
kfree(p);
return NULL;
}
-EXPORT_SYMBOL(alloc_netdev_mq);
+EXPORT_SYMBOL(alloc_netdev_mqs);
/**
* free_netdev - free network device