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Date: Sun, 9 Jan 2011 21:36:31 -0800 (PST)
From: Tom Herbert <therbert@...gle.com>
To: davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH 1/2] 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@...gle.com>
---
include/linux/etherdevice.h | 4 +++-
include/linux/netdevice.h | 10 +++++++---
net/core/dev.c | 32 +++++++++++++++++++++-----------
net/ethernet/eth.c | 12 +++++++-----
4 files changed, 38 insertions(+), 20 deletions(-)
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index f16a010..bec8b82 100644
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -48,8 +48,10 @@ extern int eth_validate_addr(struct net_device *dev);
-extern struct net_device *alloc_etherdev_mq(int sizeof_priv, unsigned int queue_count);
+extern struct net_device *alloc_etherdev_mqs(int sizeof_priv, unsigned int txqs,
+ unsigned int rxqs);
#define alloc_etherdev(sizeof_priv) alloc_etherdev_mq(sizeof_priv, 1)
+#define alloc_etherdev_mq(sizeof_priv, count) alloc_etherdev_mqs(sizeof_priv, count, count)
/**
* is_zero_ether_addr - Determine if give Ethernet address is all zeros.
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 0f6b1c9..132baf4 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2191,11 +2191,15 @@ static inline void netif_addr_unlock_bh(struct net_device *dev)
extern void ether_setup(struct net_device *dev);
/* Support for loadable net-drivers */
-extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
+extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
void (*setup)(struct net_device *),
- unsigned int queue_count);
+ unsigned int txqs, unsigned int rxqs);
#define alloc_netdev(sizeof_priv, name, setup) \
- alloc_netdev_mq(sizeof_priv, name, setup, 1)
+ alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
+
+#define alloc_netdev_mq(sizeof_priv, name, setup, count) \
+ alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
+
extern int register_netdev(struct net_device *dev);
extern void unregister_netdev(struct net_device *dev);
diff --git a/net/core/dev.c b/net/core/dev.c
index a215269..d13cd64 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5621,18 +5621,20 @@ 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;
@@ -5640,12 +5642,20 @@ 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 */
@@ -5676,14 +5686,14 @@ 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
@@ -5711,7 +5721,7 @@ free_p:
kfree(p);
return NULL;
}
-EXPORT_SYMBOL(alloc_netdev_mq);
+EXPORT_SYMBOL(alloc_netdev_mqs);
/**
* free_netdev - free network device
diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index f00ef2f..f9d7ac9 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -347,10 +347,11 @@ void ether_setup(struct net_device *dev)
EXPORT_SYMBOL(ether_setup);
/**
- * alloc_etherdev_mq - Allocates and sets up an Ethernet device
+ * alloc_etherdev_mqs - Allocates and sets up an Ethernet device
* @sizeof_priv: Size of additional driver-private structure to be allocated
* for this Ethernet device
- * @queue_count: The number of queues this device has.
+ * @txqs: The number of TX queues this device has.
+ * @txqs: The number of RX queues this device has.
*
* Fill in the fields of the device structure with Ethernet-generic
* values. Basically does everything except registering the device.
@@ -360,11 +361,12 @@ EXPORT_SYMBOL(ether_setup);
* this private data area.
*/
-struct net_device *alloc_etherdev_mq(int sizeof_priv, unsigned int queue_count)
+struct net_device *alloc_etherdev_mqs(int sizeof_priv, unsigned int txqs,
+ unsigned int rxqs)
{
- return alloc_netdev_mq(sizeof_priv, "eth%d", ether_setup, queue_count);
+ return alloc_netdev_mqs(sizeof_priv, "eth%d", ether_setup, txqs, rxqs);
}
-EXPORT_SYMBOL(alloc_etherdev_mq);
+EXPORT_SYMBOL(alloc_etherdev_mqs);
static size_t _format_mac_addr(char *buf, int buflen,
const unsigned char *addr, int len)
--
1.7.3.1
--
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