mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 03:33:59 +08:00
net: allocate tx queues in register_netdevice
This patch introduces netif_alloc_netdev_queues which is called from register_device instead of alloc_netdev_mq. This makes TX queue allocation symmetric with RX allocation. Also, queue locks allocation is done in netdev_init_one_queue. Change set_real_num_tx_queues to fail if requested number < 1 or greater than number of allocated queues. Signed-off-by: Tom Herbert <therbert@google.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert
David S. Miller
parent
bd25fa7ba5
commit
e6484930d7
@ -1696,8 +1696,8 @@ static inline int netif_is_multiqueue(const struct net_device *dev)
|
||||
return dev->num_tx_queues > 1;
|
||||
}
|
||||
|
||||
extern void netif_set_real_num_tx_queues(struct net_device *dev,
|
||||
unsigned int txq);
|
||||
extern int netif_set_real_num_tx_queues(struct net_device *dev,
|
||||
unsigned int txq);
|
||||
|
||||
#ifdef CONFIG_RPS
|
||||
extern int netif_set_real_num_rx_queues(struct net_device *dev,
|
||||
|
||||
106
net/core/dev.c
106
net/core/dev.c
@ -1553,18 +1553,20 @@ static void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
|
||||
* Routine to help set real_num_tx_queues. To avoid skbs mapped to queues
|
||||
* greater then real_num_tx_queues stale skbs on the qdisc must be flushed.
|
||||
*/
|
||||
void netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq)
|
||||
int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq)
|
||||
{
|
||||
unsigned int real_num = dev->real_num_tx_queues;
|
||||
if (txq < 1 || txq > dev->num_tx_queues)
|
||||
return -EINVAL;
|
||||
|
||||
if (unlikely(txq > dev->num_tx_queues))
|
||||
;
|
||||
else if (txq > real_num)
|
||||
dev->real_num_tx_queues = txq;
|
||||
else if (txq < real_num) {
|
||||
dev->real_num_tx_queues = txq;
|
||||
qdisc_reset_all_tx_gt(dev, txq);
|
||||
if (dev->reg_state == NETREG_REGISTERED) {
|
||||
ASSERT_RTNL();
|
||||
|
||||
if (txq < dev->real_num_tx_queues)
|
||||
qdisc_reset_all_tx_gt(dev, txq);
|
||||
}
|
||||
|
||||
dev->real_num_tx_queues = txq;
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(netif_set_real_num_tx_queues);
|
||||
|
||||
@ -4928,20 +4930,6 @@ static void rollback_registered(struct net_device *dev)
|
||||
rollback_registered_many(&single);
|
||||
}
|
||||
|
||||
static void __netdev_init_queue_locks_one(struct net_device *dev,
|
||||
struct netdev_queue *dev_queue,
|
||||
void *_unused)
|
||||
{
|
||||
spin_lock_init(&dev_queue->_xmit_lock);
|
||||
netdev_set_xmit_lockdep_class(&dev_queue->_xmit_lock, dev->type);
|
||||
dev_queue->xmit_lock_owner = -1;
|
||||
}
|
||||
|
||||
static void netdev_init_queue_locks(struct net_device *dev)
|
||||
{
|
||||
netdev_for_each_tx_queue(dev, __netdev_init_queue_locks_one, NULL);
|
||||
}
|
||||
|
||||
unsigned long netdev_fix_features(unsigned long features, const char *name)
|
||||
{
|
||||
/* Fix illegal SG+CSUM combinations. */
|
||||
@ -5034,6 +5022,41 @@ static int netif_alloc_rx_queues(struct net_device *dev)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int netif_alloc_netdev_queues(struct net_device *dev)
|
||||
{
|
||||
unsigned int count = dev->num_tx_queues;
|
||||
struct netdev_queue *tx;
|
||||
|
||||
BUG_ON(count < 1);
|
||||
|
||||
tx = kcalloc(count, sizeof(struct netdev_queue), GFP_KERNEL);
|
||||
if (!tx) {
|
||||
pr_err("netdev: Unable to allocate %u tx queues.\n",
|
||||
count);
|
||||
return -ENOMEM;
|
||||
}
|
||||
dev->_tx = tx;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void netdev_init_one_queue(struct net_device *dev,
|
||||
struct netdev_queue *queue,
|
||||
void *_unused)
|
||||
{
|
||||
queue->dev = dev;
|
||||
|
||||
/* Initialize queue lock */
|
||||
spin_lock_init(&queue->_xmit_lock);
|
||||
netdev_set_xmit_lockdep_class(&queue->_xmit_lock, dev->type);
|
||||
queue->xmit_lock_owner = -1;
|
||||
}
|
||||
|
||||
static void netdev_init_queues(struct net_device *dev)
|
||||
{
|
||||
netdev_for_each_tx_queue(dev, netdev_init_one_queue, NULL);
|
||||
spin_lock_init(&dev->tx_global_lock);
|
||||
}
|
||||
|
||||
/**
|
||||
* register_netdevice - register a network device
|
||||
* @dev: device to register
|
||||
@ -5067,7 +5090,6 @@ int register_netdevice(struct net_device *dev)
|
||||
|
||||
spin_lock_init(&dev->addr_list_lock);
|
||||
netdev_set_addr_lockdep_class(dev);
|
||||
netdev_init_queue_locks(dev);
|
||||
|
||||
dev->iflink = -1;
|
||||
|
||||
@ -5075,6 +5097,12 @@ int register_netdevice(struct net_device *dev)
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
ret = netif_alloc_netdev_queues(dev);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
netdev_init_queues(dev);
|
||||
|
||||
/* Init, if this function is available */
|
||||
if (dev->netdev_ops->ndo_init) {
|
||||
ret = dev->netdev_ops->ndo_init(dev);
|
||||
@ -5456,19 +5484,6 @@ struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
|
||||
}
|
||||
EXPORT_SYMBOL(dev_get_stats);
|
||||
|
||||
static void netdev_init_one_queue(struct net_device *dev,
|
||||
struct netdev_queue *queue,
|
||||
void *_unused)
|
||||
{
|
||||
queue->dev = dev;
|
||||
}
|
||||
|
||||
static void netdev_init_queues(struct net_device *dev)
|
||||
{
|
||||
netdev_for_each_tx_queue(dev, netdev_init_one_queue, NULL);
|
||||
spin_lock_init(&dev->tx_global_lock);
|
||||
}
|
||||
|
||||
struct netdev_queue *dev_ingress_queue_create(struct net_device *dev)
|
||||
{
|
||||
struct netdev_queue *queue = dev_ingress_queue(dev);
|
||||
@ -5480,7 +5495,6 @@ struct netdev_queue *dev_ingress_queue_create(struct net_device *dev)
|
||||
if (!queue)
|
||||
return NULL;
|
||||
netdev_init_one_queue(dev, queue, NULL);
|
||||
__netdev_init_queue_locks_one(dev, queue, NULL);
|
||||
queue->qdisc = &noop_qdisc;
|
||||
queue->qdisc_sleeping = &noop_qdisc;
|
||||
rcu_assign_pointer(dev->ingress_queue, queue);
|
||||
@ -5502,7 +5516,6 @@ struct netdev_queue *dev_ingress_queue_create(struct net_device *dev)
|
||||
struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
|
||||
void (*setup)(struct net_device *), unsigned int queue_count)
|
||||
{
|
||||
struct netdev_queue *tx;
|
||||
struct net_device *dev;
|
||||
size_t alloc_size;
|
||||
struct net_device *p;
|
||||
@ -5530,20 +5543,12 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
|
||||
return NULL;
|
||||
}
|
||||
|
||||
tx = kcalloc(queue_count, sizeof(struct netdev_queue), GFP_KERNEL);
|
||||
if (!tx) {
|
||||
printk(KERN_ERR "alloc_netdev: Unable to allocate "
|
||||
"tx qdiscs.\n");
|
||||
goto free_p;
|
||||
}
|
||||
|
||||
|
||||
dev = PTR_ALIGN(p, NETDEV_ALIGN);
|
||||
dev->padded = (char *)dev - (char *)p;
|
||||
|
||||
dev->pcpu_refcnt = alloc_percpu(int);
|
||||
if (!dev->pcpu_refcnt)
|
||||
goto free_tx;
|
||||
goto free_p;
|
||||
|
||||
if (dev_addr_init(dev))
|
||||
goto free_pcpu;
|
||||
@ -5553,7 +5558,6 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
|
||||
|
||||
dev_net_set(dev, &init_net);
|
||||
|
||||
dev->_tx = tx;
|
||||
dev->num_tx_queues = queue_count;
|
||||
dev->real_num_tx_queues = queue_count;
|
||||
|
||||
@ -5564,8 +5568,6 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
|
||||
|
||||
dev->gso_max_size = GSO_MAX_SIZE;
|
||||
|
||||
netdev_init_queues(dev);
|
||||
|
||||
INIT_LIST_HEAD(&dev->ethtool_ntuple_list.list);
|
||||
dev->ethtool_ntuple_list.count = 0;
|
||||
INIT_LIST_HEAD(&dev->napi_list);
|
||||
@ -5576,8 +5578,6 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
|
||||
strcpy(dev->name, name);
|
||||
return dev;
|
||||
|
||||
free_tx:
|
||||
kfree(tx);
|
||||
free_pcpu:
|
||||
free_percpu(dev->pcpu_refcnt);
|
||||
free_p:
|
||||
|
||||
Loading…
Reference in New Issue
Block a user