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authorStephen Hemminger <shemminger@linux-foundation.org>2007-10-03 19:41:36 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 19:47:45 -0400
commitbea3348eef27e6044b6161fd04c3152215f96411 (patch)
treef0990b263e5ce42505d290a4c346fe990bcd4c33 /drivers/net/chelsio/sge.h
parentdde4e47e8fe333a5649a3fa0e7db1fa7c08d6158 (diff)
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net device, and some have a single interrupt doorbell for several queues. In either case, it's easier to support layouts like that if the structure representing the poll is independant from the net device itself. The signature of the ->poll() call back goes from: int foo_poll(struct net_device *dev, int *budget) to int foo_poll(struct napi_struct *napi, int budget) The caller is returned the number of RX packets processed (or the number of "NAPI credits" consumed if you want to get abstract). The callee no longer messes around bumping dev->quota, *budget, etc. because that is all handled in the caller upon return. The napi_struct is to be embedded in the device driver private data structures. Furthermore, it is the driver's responsibility to disable all NAPI instances in it's ->stop() device close handler. Since the napi_struct is privatized into the driver's private data structures, only the driver knows how to get at all of the napi_struct instances it may have per-device. With lots of help and suggestions from Rusty Russell, Roland Dreier, Michael Chan, Jeff Garzik, and Jamal Hadi Salim. Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra, Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan. [ Ported to current tree and all drivers converted. Integrated Stephen's follow-on kerneldoc additions, and restored poll_list handling to the old style to fix mutual exclusion issues. -DaveM ] Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/chelsio/sge.h')
-rw-r--r--drivers/net/chelsio/sge.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/chelsio/sge.h b/drivers/net/chelsio/sge.h
index d132a0ef2a22..713d9c55f24d 100644
--- a/drivers/net/chelsio/sge.h
+++ b/drivers/net/chelsio/sge.h
@@ -77,7 +77,7 @@ int t1_sge_configure(struct sge *, struct sge_params *);
77int t1_sge_set_coalesce_params(struct sge *, struct sge_params *); 77int t1_sge_set_coalesce_params(struct sge *, struct sge_params *);
78void t1_sge_destroy(struct sge *); 78void t1_sge_destroy(struct sge *);
79irqreturn_t t1_interrupt(int irq, void *cookie); 79irqreturn_t t1_interrupt(int irq, void *cookie);
80int t1_poll(struct net_device *, int *); 80int t1_poll(struct napi_struct *, int);
81 81
82int t1_start_xmit(struct sk_buff *skb, struct net_device *dev); 82int t1_start_xmit(struct sk_buff *skb, struct net_device *dev);
83void t1_set_vlan_accel(struct adapter *adapter, int on_off); 83void t1_set_vlan_accel(struct adapter *adapter, int on_off);