[SCSI] ips: sg chaining support to the path to non I/O commands

[linux-2.6-omap-h63xx.git] / include / linux / netdevice.h

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 1e6af4f174b6cd5affaf7baf75597490e6915fce..ee81906b5164deccb24ed396f95697b4a79638b2 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -319,9 +319,15 @@ struct napi_struct {
 enum
 {
        NAPI_STATE_SCHED,       /* Poll is scheduled */
+       NAPI_STATE_DISABLE,     /* Disable pending */
 };
 
-extern void FASTCALL(__napi_schedule(struct napi_struct *n));
+extern void __napi_schedule(struct napi_struct *n);
+
+static inline int napi_disable_pending(struct napi_struct *n)
+{
+       return test_bit(NAPI_STATE_DISABLE, &n->state);
+}
 
 /**
  *     napi_schedule_prep - check if napi can be scheduled
@@ -329,11 +335,13 @@ extern void FASTCALL(__napi_schedule(struct napi_struct *n));
  *
  * Test if NAPI routine is already running, and if not mark
  * it as running.  This is used as a condition variable
- * insure only one NAPI poll instance runs
+ * insure only one NAPI poll instance runs.  We also make
+ * sure there is no pending NAPI disable.
  */
 static inline int napi_schedule_prep(struct napi_struct *n)
 {
-       return !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
+       return !napi_disable_pending(n) &&
+               !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
 }
 
 /**
@@ -375,9 +383,11 @@ static inline void __napi_complete(struct napi_struct *n)
 
 static inline void napi_complete(struct napi_struct *n)
 {
-       local_irq_disable();
+       unsigned long flags;
+
+       local_irq_save(flags);
        __napi_complete(n);
-       local_irq_enable();
+       local_irq_restore(flags);
 }
 
 /**
@@ -389,8 +399,10 @@ static inline void napi_complete(struct napi_struct *n)
  */
 static inline void napi_disable(struct napi_struct *n)
 {
+       set_bit(NAPI_STATE_DISABLE, &n->state);
        while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
                msleep(1);
+       clear_bit(NAPI_STATE_DISABLE, &n->state);
 }
 
 /**
@@ -594,6 +606,10 @@ struct net_device
 
        unsigned char           broadcast[MAX_ADDR_LEN];        /* hw bcast add */
 
+       /* ingress path synchronizer */
+       spinlock_t              ingress_lock;
+       struct Qdisc            *qdisc_ingress;
+
 /*
  * Cache line mostly used on queue transmit path (qdisc)
  */
@@ -607,10 +623,6 @@ struct net_device
        /* Partially transmitted GSO packet. */
        struct sk_buff          *gso_skb;
 
-       /* ingress path synchronizer */
-       spinlock_t              ingress_lock;
-       struct Qdisc            *qdisc_ingress;
-
 /*
  * One part is mostly used on xmit path (device)
  */
@@ -1062,12 +1074,14 @@ static inline int netif_is_multiqueue(const struct net_device *dev)
 }
 
 /* Use this variant when it is known for sure that it
- * is executing from interrupt context.
+ * is executing from hardware interrupt context or with hardware interrupts
+ * disabled.
  */
 extern void dev_kfree_skb_irq(struct sk_buff *skb);
 
 /* Use this variant in places where it could be invoked
- * either from interrupt or non-interrupt context.
+ * from either hardware interrupt or other context, with hardware interrupts
+ * either disabled or enabled.
  */
 extern void dev_kfree_skb_any(struct sk_buff *skb);
 
@@ -1268,7 +1282,7 @@ static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
 static inline int netif_rx_schedule_prep(struct net_device *dev,
                                         struct napi_struct *napi)
 {
-       return netif_running(dev) && napi_schedule_prep(napi);
+       return napi_schedule_prep(napi);
 }
 
 /* Add interface to tail of rx poll list. This assumes that _prep has
@@ -1277,7 +1291,6 @@ static inline int netif_rx_schedule_prep(struct net_device *dev,
 static inline void __netif_rx_schedule(struct net_device *dev,
                                       struct napi_struct *napi)
 {
-       dev_hold(dev);
        __napi_schedule(napi);
 }
 
@@ -1308,7 +1321,6 @@ static inline void __netif_rx_complete(struct net_device *dev,
                                       struct napi_struct *napi)
 {
        __napi_complete(napi);
-       dev_put(dev);
 }
 
 /* Remove interface from poll list: it must be in the poll list
@@ -1406,12 +1418,16 @@ extern void             dev_set_rx_mode(struct net_device *dev);
 extern void            __dev_set_rx_mode(struct net_device *dev);
 extern int             dev_unicast_delete(struct net_device *dev, void *addr, int alen);
 extern int             dev_unicast_add(struct net_device *dev, void *addr, int alen);
+extern int             dev_unicast_sync(struct net_device *to, struct net_device *from);
+extern void            dev_unicast_unsync(struct net_device *to, struct net_device *from);
 extern int             dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
 extern int             dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
 extern int             dev_mc_sync(struct net_device *to, struct net_device *from);
 extern void            dev_mc_unsync(struct net_device *to, struct net_device *from);
 extern int             __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
 extern int             __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
+extern int             __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
+extern void            __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
 extern void            dev_set_promiscuity(struct net_device *dev, int inc);
 extern void            dev_set_allmulti(struct net_device *dev, int inc);
 extern void            netdev_state_change(struct net_device *dev);