<sect1><title>Driver Support</title>
!Enet/core/dev.c
!Enet/ethernet/eth.c
+!Enet/sched/sch_generic.c
!Iinclude/linux/etherdevice.h
+!Iinclude/linux/netdevice.h
+ </sect1>
+ <sect1><title>PHY Support</title>
!Edrivers/net/phy/phy.c
!Idrivers/net/phy/phy.c
!Edrivers/net/phy/phy_device.c
!Idrivers/net/phy/phy_device.c
!Edrivers/net/phy/mdio_bus.c
!Idrivers/net/phy/mdio_bus.c
+ </sect1>
<!-- FIXME: Removed for now since no structured comments in source
+ <sect1><title>Wireless</title>
X!Enet/core/wireless.c
--->
</sect1>
+-->
<sect1><title>Synchronous PPP</title>
!Edrivers/net/wan/syncppp.c
</sect1>
+++ /dev/null
-HISTORY:
-February 16/2002 -- revision 0.2.1:
-COR typo corrected
-February 10/2002 -- revision 0.2:
-some spell checking ;->
-January 12/2002 -- revision 0.1
-This is still work in progress so may change.
-To keep up to date please watch this space.
-
-Introduction to NAPI
-====================
-
-NAPI is a proven (www.cyberus.ca/~hadi/usenix-paper.tgz) technique
-to improve network performance on Linux. For more details please
-read that paper.
-NAPI provides a "inherent mitigation" which is bound by system capacity
-as can be seen from the following data collected by Robert on Gigabit
-ethernet (e1000):
-
- Psize Ipps Tput Rxint Txint Done Ndone
- ---------------------------------------------------------------
- 60 890000 409362 17 27622 7 6823
- 128 758150 464364 21 9301 10 7738
- 256 445632 774646 42 15507 21 12906
- 512 232666 994445 241292 19147 241192 1062
- 1024 119061 1000003 872519 19258 872511 0
- 1440 85193 1000003 946576 19505 946569 0
-
-
-Legend:
-"Ipps" stands for input packets per second.
-"Tput" == packets out of total 1M that made it out.
-"txint" == transmit completion interrupts seen
-"Done" == The number of times that the poll() managed to pull all
-packets out of the rx ring. Note from this that the lower the
-load the more we could clean up the rxring
-"Ndone" == is the converse of "Done". Note again, that the higher
-the load the more times we couldn't clean up the rxring.
-
-Observe that:
-when the NIC receives 890Kpackets/sec only 17 rx interrupts are generated.
-The system cant handle the processing at 1 interrupt/packet at that load level.
-At lower rates on the other hand, rx interrupts go up and therefore the
-interrupt/packet ratio goes up (as observable from that table). So there is
-possibility that under low enough input, you get one poll call for each
-input packet caused by a single interrupt each time. And if the system
-cant handle interrupt per packet ratio of 1, then it will just have to
-chug along ....
-
-
-0) Prerequisites:
-==================
-A driver MAY continue using the old 2.4 technique for interfacing
-to the network stack and not benefit from the NAPI changes.
-NAPI additions to the kernel do not break backward compatibility.
-NAPI, however, requires the following features to be available:
-
-A) DMA ring or enough RAM to store packets in software devices.
-
-B) Ability to turn off interrupts or maybe events that send packets up
-the stack.
-
-NAPI processes packet events in what is known as dev->poll() method.
-Typically, only packet receive events are processed in dev->poll().
-The rest of the events MAY be processed by the regular interrupt handler
-to reduce processing latency (justified also because there are not that
-many of them).
-Note, however, NAPI does not enforce that dev->poll() only processes
-receive events.
-Tests with the tulip driver indicated slightly increased latency if
-all of the interrupt handler is moved to dev->poll(). Also MII handling
-gets a little trickier.
-The example used in this document is to move the receive processing only
-to dev->poll(); this is shown with the patch for the tulip driver.
-For an example of code that moves all the interrupt driver to
-dev->poll() look at the ported e1000 code.
-
-There are caveats that might force you to go with moving everything to
-dev->poll(). Different NICs work differently depending on their status/event
-acknowledgement setup.
-There are two types of event register ACK mechanisms.
- I) what is known as Clear-on-read (COR).
- when you read the status/event register, it clears everything!
- The natsemi and sunbmac NICs are known to do this.
- In this case your only choice is to move all to dev->poll()
-
- II) Clear-on-write (COW)
- i) you clear the status by writing a 1 in the bit-location you want.
- These are the majority of the NICs and work the best with NAPI.
- Put only receive events in dev->poll(); leave the rest in
- the old interrupt handler.
- ii) whatever you write in the status register clears every thing ;->
- Cant seem to find any supported by Linux which do this. If
- someone knows such a chip email us please.
- Move all to dev->poll()
-
-C) Ability to detect new work correctly.
-NAPI works by shutting down event interrupts when there's work and
-turning them on when there's none.
-New packets might show up in the small window while interrupts were being
-re-enabled (refer to appendix 2). A packet might sneak in during the period
-we are enabling interrupts. We only get to know about such a packet when the
-next new packet arrives and generates an interrupt.
-Essentially, there is a small window of opportunity for a race condition
-which for clarity we'll refer to as the "rotting packet".
-
-This is a very important topic and appendix 2 is dedicated for more
-discussion.
-
-Locking rules and environmental guarantees
-==========================================
-
--Guarantee: Only one CPU at any time can call dev->poll(); this is because
-only one CPU can pick the initial interrupt and hence the initial
-netif_rx_schedule(dev);
-- The core layer invokes devices to send packets in a round robin format.
-This implies receive is totally lockless because of the guarantee that only
-one CPU is executing it.
-- contention can only be the result of some other CPU accessing the rx
-ring. This happens only in close() and suspend() (when these methods
-try to clean the rx ring);
-****guarantee: driver authors need not worry about this; synchronization
-is taken care for them by the top net layer.
--local interrupts are enabled (if you dont move all to dev->poll()). For
-example link/MII and txcomplete continue functioning just same old way.
-This improves the latency of processing these events. It is also assumed that
-the receive interrupt is the largest cause of noise. Note this might not
-always be true.
-[according to Manfred Spraul, the winbond insists on sending one
-txmitcomplete interrupt for each packet (although this can be mitigated)].
-For these broken drivers, move all to dev->poll().
-
-For the rest of this text, we'll assume that dev->poll() only
-processes receive events.
-
-new methods introduce by NAPI
-=============================
-
-a) netif_rx_schedule(dev)
-Called by an IRQ handler to schedule a poll for device
-
-b) netif_rx_schedule_prep(dev)
-puts the device in a state which allows for it to be added to the
-CPU polling list if it is up and running. You can look at this as
-the first half of netif_rx_schedule(dev) above; the second half
-being c) below.
-
-c) __netif_rx_schedule(dev)
-Add device to the poll list for this CPU; assuming that _prep above
-has already been called and returned 1.
-
-d) netif_rx_reschedule(dev, undo)
-Called to reschedule polling for device specifically for some
-deficient hardware. Read Appendix 2 for more details.
-
-e) netif_rx_complete(dev)
-
-Remove interface from the CPU poll list: it must be in the poll list
-on current cpu. This primitive is called by dev->poll(), when
-it completes its work. The device cannot be out of poll list at this
-call, if it is then clearly it is a BUG(). You'll know ;->
-
-All of the above methods are used below, so keep reading for clarity.
-
-Device driver changes to be made when porting NAPI
-==================================================
-
-Below we describe what kind of changes are required for NAPI to work.
-
-1) introduction of dev->poll() method
-=====================================
-
-This is the method that is invoked by the network core when it requests
-for new packets from the driver. A driver is allowed to send upto
-dev->quota packets by the current CPU before yielding to the network
-subsystem (so other devices can also get opportunity to send to the stack).
-
-dev->poll() prototype looks as follows:
-int my_poll(struct net_device *dev, int *budget)
-
-budget is the remaining number of packets the network subsystem on the
-current CPU can send up the stack before yielding to other system tasks.
-*Each driver is responsible for decrementing budget by the total number of
-packets sent.
- Total number of packets cannot exceed dev->quota.
-
-dev->poll() method is invoked by the top layer, the driver just sends if it
-can to the stack the packet quantity requested.
-
-more on dev->poll() below after the interrupt changes are explained.
-
-2) registering dev->poll() method
-===================================
-
-dev->poll should be set in the dev->probe() method.
-e.g:
-dev->open = my_open;
-.
-.
-/* two new additions */
-/* first register my poll method */
-dev->poll = my_poll;
-/* next register my weight/quanta; can be overridden in /proc */
-dev->weight = 16;
-.
-.
-dev->stop = my_close;
-
-
-
-3) scheduling dev->poll()
-=============================
-This involves modifying the interrupt handler and the code
-path which takes the packet off the NIC and sends them to the
-stack.
-
-it's important at this point to introduce the classical D Becker
-interrupt processor:
-
-------------------
-static irqreturn_t
-netdevice_interrupt(int irq, void *dev_id, struct pt_regs *regs)
-{
-
- struct net_device *dev = (struct net_device *)dev_instance;
- struct my_private *tp = (struct my_private *)dev->priv;
-
- int work_count = my_work_count;
- status = read_interrupt_status_reg();
- if (status == 0)
- return IRQ_NONE; /* Shared IRQ: not us */
- if (status == 0xffff)
- return IRQ_HANDLED; /* Hot unplug */
- if (status & error)
- do_some_error_handling()
-
- do {
- acknowledge_ints_ASAP();
-
- if (status & link_interrupt) {
- spin_lock(&tp->link_lock);
- do_some_link_stat_stuff();
- spin_lock(&tp->link_lock);
- }
-
- if (status & rx_interrupt) {
- receive_packets(dev);
- }
-
- if (status & rx_nobufs) {
- make_rx_buffs_avail();
- }
-
- if (status & tx_related) {
- spin_lock(&tp->lock);
- tx_ring_free(dev);
- if (tx_died)
- restart_tx();
- spin_unlock(&tp->lock);
- }
-
- status = read_interrupt_status_reg();
-
- } while (!(status & error) || more_work_to_be_done);
- return IRQ_HANDLED;
-}
-
-----------------------------------------------------------------------
-
-We now change this to what is shown below to NAPI-enable it:
-
-----------------------------------------------------------------------
-static irqreturn_t
-netdevice_interrupt(int irq, void *dev_id, struct pt_regs *regs)
-{
- struct net_device *dev = (struct net_device *)dev_instance;
- struct my_private *tp = (struct my_private *)dev->priv;
-
- status = read_interrupt_status_reg();
- if (status == 0)
- return IRQ_NONE; /* Shared IRQ: not us */
- if (status == 0xffff)
- return IRQ_HANDLED; /* Hot unplug */
- if (status & error)
- do_some_error_handling();
-
- do {
-/************************ start note *********************************/
- acknowledge_ints_ASAP(); // dont ack rx and rxnobuff here
-/************************ end note *********************************/
-
- if (status & link_interrupt) {
- spin_lock(&tp->link_lock);
- do_some_link_stat_stuff();
- spin_unlock(&tp->link_lock);
- }
-/************************ start note *********************************/
- if (status & rx_interrupt || (status & rx_nobuffs)) {
- if (netif_rx_schedule_prep(dev)) {
-
- /* disable interrupts caused
- * by arriving packets */
- disable_rx_and_rxnobuff_ints();
- /* tell system we have work to be done. */
- __netif_rx_schedule(dev);
- } else {
- printk("driver bug! interrupt while in poll\n");
- /* FIX by disabling interrupts */
- disable_rx_and_rxnobuff_ints();
- }
- }
-/************************ end note note *********************************/
-
- if (status & tx_related) {
- spin_lock(&tp->lock);
- tx_ring_free(dev);
-
- if (tx_died)
- restart_tx();
- spin_unlock(&tp->lock);
- }
-
- status = read_interrupt_status_reg();
-
-/************************ start note *********************************/
- } while (!(status & error) || more_work_to_be_done(status));
-/************************ end note note *********************************/
- return IRQ_HANDLED;
-}
-
----------------------------------------------------------------------
-
-
-We note several things from above:
-
-I) Any interrupt source which is caused by arriving packets is now
-turned off when it occurs. Depending on the hardware, there could be
-several reasons that arriving packets would cause interrupts; these are the
-interrupt sources we wish to avoid. The two common ones are a) a packet
-arriving (rxint) b) a packet arriving and finding no DMA buffers available
-(rxnobuff) .
-This means also acknowledge_ints_ASAP() will not clear the status
-register for those two items above; clearing is done in the place where
-proper work is done within NAPI; at the poll() and refill_rx_ring()
-discussed further below.
-netif_rx_schedule_prep() returns 1 if device is in running state and
-gets successfully added to the core poll list. If we get a zero value
-we can _almost_ assume are already added to the list (instead of not running.
-Logic based on the fact that you shouldn't get interrupt if not running)
-We rectify this by disabling rx and rxnobuf interrupts.
-
-II) that receive_packets(dev) and make_rx_buffs_avail() may have disappeared.
-These functionalities are still around actually......
-
-infact, receive_packets(dev) is very close to my_poll() and
-make_rx_buffs_avail() is invoked from my_poll()
-
-4) converting receive_packets() to dev->poll()
-===============================================
-
-We need to convert the classical D Becker receive_packets(dev) to my_poll()
-
-First the typical receive_packets() below:
--------------------------------------------------------------------
-
-/* this is called by interrupt handler */
-static void receive_packets (struct net_device *dev)
-{
-
- struct my_private *tp = (struct my_private *)dev->priv;
- rx_ring = tp->rx_ring;
- cur_rx = tp->cur_rx;
- int entry = cur_rx % RX_RING_SIZE;
- int received = 0;
- int rx_work_limit = tp->dirty_rx + RX_RING_SIZE - tp->cur_rx;
-
- while (rx_ring_not_empty) {
- u32 rx_status;
- unsigned int rx_size;
- unsigned int pkt_size;
- struct sk_buff *skb;
- /* read size+status of next frame from DMA ring buffer */
- /* the number 16 and 4 are just examples */
- rx_status = le32_to_cpu (*(u32 *) (rx_ring + ring_offset));
- rx_size = rx_status >> 16;
- pkt_size = rx_size - 4;
-
- /* process errors */
- if ((rx_size > (MAX_ETH_FRAME_SIZE+4)) ||
- (!(rx_status & RxStatusOK))) {
- netdrv_rx_err (rx_status, dev, tp, ioaddr);
- return;
- }
-
- if (--rx_work_limit < 0)
- break;
-
- /* grab a skb */
- skb = dev_alloc_skb (pkt_size + 2);
- if (skb) {
- .
- .
- netif_rx (skb);
- .
- .
- } else { /* OOM */
- /*seems very driver specific ... some just pass
- whatever is on the ring already. */
- }
-
- /* move to the next skb on the ring */
- entry = (++tp->cur_rx) % RX_RING_SIZE;
- received++ ;
-
- }
-
- /* store current ring pointer state */
- tp->cur_rx = cur_rx;
-
- /* Refill the Rx ring buffers if they are needed */
- refill_rx_ring();
- .
- .
-
-}
--------------------------------------------------------------------
-We change it to a new one below; note the additional parameter in
-the call.
-
--------------------------------------------------------------------
-
-/* this is called by the network core */
-static int my_poll (struct net_device *dev, int *budget)
-{
-
- struct my_private *tp = (struct my_private *)dev->priv;
- rx_ring = tp->rx_ring;
- cur_rx = tp->cur_rx;
- int entry = cur_rx % RX_BUF_LEN;
- /* maximum packets to send to the stack */
-/************************ note note *********************************/
- int rx_work_limit = dev->quota;
-
-/************************ end note note *********************************/
- do { // outer beginning loop starts here
-
- clear_rx_status_register_bit();
-
- while (rx_ring_not_empty) {
- u32 rx_status;
- unsigned int rx_size;
- unsigned int pkt_size;
- struct sk_buff *skb;
- /* read size+status of next frame from DMA ring buffer */
- /* the number 16 and 4 are just examples */
- rx_status = le32_to_cpu (*(u32 *) (rx_ring + ring_offset));
- rx_size = rx_status >> 16;
- pkt_size = rx_size - 4;
-
- /* process errors */
- if ((rx_size > (MAX_ETH_FRAME_SIZE+4)) ||
- (!(rx_status & RxStatusOK))) {
- netdrv_rx_err (rx_status, dev, tp, ioaddr);
- return 1;
- }
-
-/************************ note note *********************************/
- if (--rx_work_limit < 0) { /* we got packets, but no quota */
- /* store current ring pointer state */
- tp->cur_rx = cur_rx;
-
- /* Refill the Rx ring buffers if they are needed */
- refill_rx_ring(dev);
- goto not_done;
- }
-/********************** end note **********************************/
-
- /* grab a skb */
- skb = dev_alloc_skb (pkt_size + 2);
- if (skb) {
- .
- .
-/************************ note note *********************************/
- netif_receive_skb (skb);
-/********************** end note **********************************/
- .
- .
- } else { /* OOM */
- /*seems very driver specific ... common is just pass
- whatever is on the ring already. */
- }
-
- /* move to the next skb on the ring */
- entry = (++tp->cur_rx) % RX_RING_SIZE;
- received++ ;
-
- }
-
- /* store current ring pointer state */
- tp->cur_rx = cur_rx;
-
- /* Refill the Rx ring buffers if they are needed */
- refill_rx_ring(dev);
-
- /* no packets on ring; but new ones can arrive since we last
- checked */
- status = read_interrupt_status_reg();
- if (rx status is not set) {
- /* If something arrives in this narrow window,
- an interrupt will be generated */
- goto done;
- }
- /* done! at least that's what it looks like ;->
- if new packets came in after our last check on status bits
- they'll be caught by the while check and we go back and clear them
- since we havent exceeded our quota */
- } while (rx_status_is_set);
-
-done:
-
-/************************ note note *********************************/
- dev->quota -= received;
- *budget -= received;
-
- /* If RX ring is not full we are out of memory. */
- if (tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb == NULL)
- goto oom;
-
- /* we are happy/done, no more packets on ring; put us back
- to where we can start processing interrupts again */
- netif_rx_complete(dev);
- enable_rx_and_rxnobuf_ints();
-
- /* The last op happens after poll completion. Which means the following:
- * 1. it can race with disabling irqs in irq handler (which are done to
- * schedule polls)
- * 2. it can race with dis/enabling irqs in other poll threads
- * 3. if an irq raised after the beginning of the outer beginning
- * loop (marked in the code above), it will be immediately
- * triggered here.
- *
- * Summarizing: the logic may result in some redundant irqs both
- * due to races in masking and due to too late acking of already
- * processed irqs. The good news: no events are ever lost.
- */
-
- return 0; /* done */
-
-not_done:
- if (tp->cur_rx - tp->dirty_rx > RX_RING_SIZE/2 ||
- tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb == NULL)
- refill_rx_ring(dev);
-
- if (!received) {
- printk("received==0\n");
- received = 1;
- }
- dev->quota -= received;
- *budget -= received;
- return 1; /* not_done */
-
-oom:
- /* Start timer, stop polling, but do not enable rx interrupts. */
- start_poll_timer(dev);
- return 0; /* we'll take it from here so tell core "done"*/
-
-/************************ End note note *********************************/
-}
--------------------------------------------------------------------
-
-From above we note that:
-0) rx_work_limit = dev->quota
-1) refill_rx_ring() is in charge of clearing the bit for rxnobuff when
-it does the work.
-2) We have a done and not_done state.
-3) instead of netif_rx() we call netif_receive_skb() to pass the skb.
-4) we have a new way of handling oom condition
-5) A new outer for (;;) loop has been added. This serves the purpose of
-ensuring that if a new packet has come in, after we are all set and done,
-and we have not exceeded our quota that we continue sending packets up.
-
-
------------------------------------------------------------
-Poll timer code will need to do the following:
-
-a)
-
- if (tp->cur_rx - tp->dirty_rx > RX_RING_SIZE/2 ||
- tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb == NULL)
- refill_rx_ring(dev);
-
- /* If RX ring is not full we are still out of memory.
- Restart the timer again. Else we re-add ourselves
- to the master poll list.
- */
-
- if (tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb == NULL)
- restart_timer();
-
- else netif_rx_schedule(dev); /* we are back on the poll list */
-
-5) dev->close() and dev->suspend() issues
-==========================================
-The driver writer needn't worry about this; the top net layer takes
-care of it.
-
-6) Adding new Stats to /proc
-=============================
-In order to debug some of the new features, we introduce new stats
-that need to be collected.
-TODO: Fill this later.
-
-APPENDIX 1: discussion on using ethernet HW FC
-==============================================
-Most chips with FC only send a pause packet when they run out of Rx buffers.
-Since packets are pulled off the DMA ring by a softirq in NAPI,
-if the system is slow in grabbing them and we have a high input
-rate (faster than the system's capacity to remove packets), then theoretically
-there will only be one rx interrupt for all packets during a given packetstorm.
-Under low load, we might have a single interrupt per packet.
-FC should be programmed to apply in the case when the system cant pull out
-packets fast enough i.e send a pause only when you run out of rx buffers.
-Note FC in itself is a good solution but we have found it to not be
-much of a commodity feature (both in NICs and switches) and hence falls
-under the same category as using NIC based mitigation. Also, experiments
-indicate that it's much harder to resolve the resource allocation
-issue (aka lazy receiving that NAPI offers) and hence quantify its usefulness
-proved harder. In any case, FC works even better with NAPI but is not
-necessary.
-
-
-APPENDIX 2: the "rotting packet" race-window avoidance scheme
-=============================================================
-
-There are two types of associations seen here
-
-1) status/int which honors level triggered IRQ
-
-If a status bit for receive or rxnobuff is set and the corresponding
-interrupt-enable bit is not on, then no interrupts will be generated. However,
-as soon as the "interrupt-enable" bit is unmasked, an immediate interrupt is
-generated. [assuming the status bit was not turned off].
-Generally the concept of level triggered IRQs in association with a status and
-interrupt-enable CSR register set is used to avoid the race.
-
-If we take the example of the tulip:
-"pending work" is indicated by the status bit(CSR5 in tulip).
-the corresponding interrupt bit (CSR7 in tulip) might be turned off (but
-the CSR5 will continue to be turned on with new packet arrivals even if
-we clear it the first time)
-Very important is the fact that if we turn on the interrupt bit on when
-status is set that an immediate irq is triggered.
-
-If we cleared the rx ring and proclaimed there was "no more work
-to be done" and then went on to do a few other things; then when we enable
-interrupts, there is a possibility that a new packet might sneak in during
-this phase. It helps to look at the pseudo code for the tulip poll
-routine:
-
---------------------------
- do {
- ACK;
- while (ring_is_not_empty()) {
- work-work-work
- if quota is exceeded: exit, no touching irq status/mask
- }
- /* No packets, but new can arrive while we are doing this*/
- CSR5 := read
- if (CSR5 is not set) {
- /* If something arrives in this narrow window here,
- * where the comments are ;-> irq will be generated */
- unmask irqs;
- exit poll;
- }
- } while (rx_status_is_set);
-------------------------
-
-CSR5 bit of interest is only the rx status.
-If you look at the last if statement:
-you just finished grabbing all the packets from the rx ring .. you check if
-status bit says there are more packets just in ... it says none; you then
-enable rx interrupts again; if a new packet just came in during this check,
-we are counting that CSR5 will be set in that small window of opportunity
-and that by re-enabling interrupts, we would actually trigger an interrupt
-to register the new packet for processing.
-
-[The above description nay be very verbose, if you have better wording
-that will make this more understandable, please suggest it.]
-
-2) non-capable hardware
-
-These do not generally respect level triggered IRQs. Normally,
-irqs may be lost while being masked and the only way to leave poll is to do
-a double check for new input after netif_rx_complete() is invoked
-and re-enable polling (after seeing this new input).
-
-Sample code:
-
----------
- .
- .
-restart_poll:
- while (ring_is_not_empty()) {
- work-work-work
- if quota is exceeded: exit, not touching irq status/mask
- }
- .
- .
- .
- enable_rx_interrupts()
- netif_rx_complete(dev);
- if (ring_has_new_packet() && netif_rx_reschedule(dev, received)) {
- disable_rx_and_rxnobufs()
- goto restart_poll
- } while (rx_status_is_set);
----------
-
-Basically netif_rx_complete() removes us from the poll list, but because a
-new packet which will never be caught due to the possibility of a race
-might come in, we attempt to re-add ourselves to the poll list.
-
-
-
-
-APPENDIX 3: Scheduling issues.
-==============================
-As seen NAPI moves processing to softirq level. Linux uses the ksoftirqd as the
-general solution to schedule softirq's to run before next interrupt and by putting
-them under scheduler control. Also this prevents consecutive softirq's from
-monopolize the CPU. This also have the effect that the priority of ksoftirq needs
-to be considered when running very CPU-intensive applications and networking to
-get the proper balance of softirq/user balance. Increasing ksoftirq priority to 0
-(eventually more) is reported cure problems with low network performance at high
-CPU load.
-
-Most used processes in a GIGE router:
-USER PID %CPU %MEM SIZE RSS TTY STAT START TIME COMMAND
-root 3 0.2 0.0 0 0 ? RWN Aug 15 602:00 (ksoftirqd_CPU0)
-root 232 0.0 7.9 41400 40884 ? S Aug 15 74:12 gated
-
---------------------------------------------------------------------
-
-relevant sites:
-==================
-ftp://robur.slu.se/pub/Linux/net-development/NAPI/
-
-
---------------------------------------------------------------------
-TODO: Write net-skeleton.c driver.
--------------------------------------------------------------
-
-Authors:
-========
-Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
-Jamal Hadi Salim <hadi@cyberus.ca>
-Robert Olsson <Robert.Olsson@data.slu.se>
-
-Acknowledgements:
-================
-People who made this document better:
-
-Lennert Buytenhek <buytenh@gnu.org>
-Andrew Morton <akpm@zip.com.au>
-Manfred Spraul <manfred@colorfullife.com>
-Donald Becker <becker@scyld.com>
-Jeff Garzik <jgarzik@pobox.com>
Synchronization: netif_tx_lock spinlock.
Context: BHs disabled
-dev->poll:
- Synchronization: __LINK_STATE_RX_SCHED bit in dev->state. See
- dev_close code and comments in net/core/dev.c for more info.
+struct napi_struct synchronization rules
+========================================
+napi->poll:
+ Synchronization: NAPI_STATE_SCHED bit in napi->state. Device
+ driver's dev->close method will invoke napi_disable() on
+ all NAPI instances which will do a sleeping poll on the
+ NAPI_STATE_SCHED napi->state bit, waiting for all pending
+ NAPI activity to cease.
Context: softirq
will be called with interrupts disabled by netconsole.
-
struct net_device *dev;
+ struct napi_struct napi;
+
unsigned long flags;
struct mutex mcast_mutex;
/* functions */
-int ipoib_poll(struct net_device *dev, int *budget);
+int ipoib_poll(struct napi_struct *napi, int budget);
void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr);
struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
wc->status, wr_id, wc->vendor_err);
}
-int ipoib_poll(struct net_device *dev, int *budget)
+int ipoib_poll(struct napi_struct *napi, int budget)
{
- struct ipoib_dev_priv *priv = netdev_priv(dev);
- int max = min(*budget, dev->quota);
+ struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv, napi);
+ struct net_device *dev = priv->dev;
int done;
int t;
- int empty;
int n, i;
done = 0;
- empty = 0;
- while (max) {
+poll_more:
+ while (done < budget) {
+ int max = (budget - done);
+
t = min(IPOIB_NUM_WC, max);
n = ib_poll_cq(priv->cq, t, priv->ibwc);
- for (i = 0; i < n; ++i) {
+ for (i = 0; i < n; i++) {
struct ib_wc *wc = priv->ibwc + i;
if (wc->wr_id & IPOIB_CM_OP_SRQ) {
++done;
- --max;
ipoib_cm_handle_rx_wc(dev, wc);
} else if (wc->wr_id & IPOIB_OP_RECV) {
++done;
- --max;
ipoib_ib_handle_rx_wc(dev, wc);
} else
ipoib_ib_handle_tx_wc(dev, wc);
}
- if (n != t) {
- empty = 1;
+ if (n != t)
break;
- }
}
- dev->quota -= done;
- *budget -= done;
-
- if (empty) {
- netif_rx_complete(dev);
+ if (done < budget) {
+ netif_rx_complete(dev, napi);
if (unlikely(ib_req_notify_cq(priv->cq,
IB_CQ_NEXT_COMP |
IB_CQ_REPORT_MISSED_EVENTS)) &&
- netif_rx_reschedule(dev, 0))
- return 1;
-
- return 0;
+ netif_rx_reschedule(dev, napi))
+ goto poll_more;
}
- return 1;
+ return done;
}
void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr)
{
- netif_rx_schedule(dev_ptr);
+ struct net_device *dev = dev_ptr;
+ struct ipoib_dev_priv *priv = netdev_priv(dev);
+
+ netif_rx_schedule(dev, &priv->napi);
}
static inline int post_send(struct ipoib_dev_priv *priv,
int i;
clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
- netif_poll_disable(dev);
ipoib_cm_dev_stop(dev);
msleep(1);
}
- netif_poll_enable(dev);
ib_req_notify_cq(priv->cq, IB_CQ_NEXT_COMP);
return 0;
ipoib_dbg(priv, "bringing up interface\n");
+ napi_enable(&priv->napi);
set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
if (ipoib_pkey_dev_delay_open(dev))
return 0;
- if (ipoib_ib_dev_open(dev))
+ if (ipoib_ib_dev_open(dev)) {
+ napi_disable(&priv->napi);
return -EINVAL;
+ }
if (ipoib_ib_dev_up(dev)) {
ipoib_ib_dev_stop(dev, 1);
+ napi_disable(&priv->napi);
return -EINVAL;
}
ipoib_dbg(priv, "stopping interface\n");
clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
+ napi_disable(&priv->napi);
netif_stop_queue(dev);
dev->hard_header = ipoib_hard_header;
dev->set_multicast_list = ipoib_set_mcast_list;
dev->neigh_setup = ipoib_neigh_setup_dev;
- dev->poll = ipoib_poll;
- dev->weight = 100;
+
+ netif_napi_add(dev, &priv->napi, ipoib_poll, 100);
dev->watchdog_timeo = HZ;
spinlock_t lock;
u32 msg_enable;
+ struct napi_struct napi;
+
struct pci_dev *pdev;
u32 rx_config;
u16 cpcmd;
return 0;
}
-static int cp_rx_poll (struct net_device *dev, int *budget)
+static int cp_rx_poll(struct napi_struct *napi, int budget)
{
- struct cp_private *cp = netdev_priv(dev);
- unsigned rx_tail = cp->rx_tail;
- unsigned rx_work = dev->quota;
- unsigned rx;
+ struct cp_private *cp = container_of(napi, struct cp_private, napi);
+ struct net_device *dev = cp->dev;
+ unsigned int rx_tail = cp->rx_tail;
+ int rx;
rx_status_loop:
rx = 0;
desc->opts1 = cpu_to_le32(DescOwn | cp->rx_buf_sz);
rx_tail = NEXT_RX(rx_tail);
- if (!rx_work--)
+ if (rx >= budget)
break;
}
cp->rx_tail = rx_tail;
- dev->quota -= rx;
- *budget -= rx;
-
/* if we did not reach work limit, then we're done with
* this round of polling
*/
- if (rx_work) {
+ if (rx < budget) {
unsigned long flags;
if (cpr16(IntrStatus) & cp_rx_intr_mask)
goto rx_status_loop;
- local_irq_save(flags);
+ spin_lock_irqsave(&cp->lock, flags);
cpw16_f(IntrMask, cp_intr_mask);
- __netif_rx_complete(dev);
- local_irq_restore(flags);
-
- return 0; /* done */
+ __netif_rx_complete(dev, napi);
+ spin_unlock_irqrestore(&cp->lock, flags);
}
- return 1; /* not done */
+ return rx;
}
static irqreturn_t cp_interrupt (int irq, void *dev_instance)
}
if (status & (RxOK | RxErr | RxEmpty | RxFIFOOvr))
- if (netif_rx_schedule_prep(dev)) {
+ if (netif_rx_schedule_prep(dev, &cp->napi)) {
cpw16_f(IntrMask, cp_norx_intr_mask);
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &cp->napi);
}
if (status & (TxOK | TxErr | TxEmpty | SWInt))
if (rc)
return rc;
+ napi_enable(&cp->napi);
+
cp_init_hw(cp);
rc = request_irq(dev->irq, cp_interrupt, IRQF_SHARED, dev->name, dev);
return 0;
err_out_hw:
+ napi_disable(&cp->napi);
cp_stop_hw(cp);
cp_free_rings(cp);
return rc;
struct cp_private *cp = netdev_priv(dev);
unsigned long flags;
+ napi_disable(&cp->napi);
+
if (netif_msg_ifdown(cp))
printk(KERN_DEBUG "%s: disabling interface\n", dev->name);
dev->hard_start_xmit = cp_start_xmit;
dev->get_stats = cp_get_stats;
dev->do_ioctl = cp_ioctl;
- dev->poll = cp_rx_poll;
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = cp_poll_controller;
#endif
- dev->weight = 16; /* arbitrary? from NAPI_HOWTO.txt. */
+ netif_napi_add(dev, &cp->napi, cp_rx_poll, 16);
#ifdef BROKEN
dev->change_mtu = cp_change_mtu;
#endif
int drv_flags;
struct pci_dev *pci_dev;
u32 msg_enable;
+ struct napi_struct napi;
+ struct net_device *dev;
struct net_device_stats stats;
unsigned char *rx_ring;
unsigned int cur_rx; /* Index into the Rx buffer of next Rx pkt. */
static void rtl8139_init_ring (struct net_device *dev);
static int rtl8139_start_xmit (struct sk_buff *skb,
struct net_device *dev);
-static int rtl8139_poll(struct net_device *dev, int *budget);
#ifdef CONFIG_NET_POLL_CONTROLLER
static void rtl8139_poll_controller(struct net_device *dev);
#endif
+static int rtl8139_poll(struct napi_struct *napi, int budget);
static irqreturn_t rtl8139_interrupt (int irq, void *dev_instance);
static int rtl8139_close (struct net_device *dev);
static int netdev_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
assert (dev != NULL);
tp = netdev_priv(dev);
+ tp->dev = dev;
ioaddr = tp->mmio_addr;
assert (ioaddr != NULL);
/* The Rtl8139-specific entries in the device structure. */
dev->open = rtl8139_open;
dev->hard_start_xmit = rtl8139_start_xmit;
- dev->poll = rtl8139_poll;
- dev->weight = 64;
+ netif_napi_add(dev, &tp->napi, rtl8139_poll, 64);
dev->stop = rtl8139_close;
dev->get_stats = rtl8139_get_stats;
dev->set_multicast_list = rtl8139_set_rx_mode;
}
+ napi_enable(&tp->napi);
+
tp->mii.full_duplex = tp->mii.force_media;
tp->tx_flag = (TX_FIFO_THRESH << 11) & 0x003f0000;
}
}
-static int rtl8139_poll(struct net_device *dev, int *budget)
+static int rtl8139_poll(struct napi_struct *napi, int budget)
{
- struct rtl8139_private *tp = netdev_priv(dev);
+ struct rtl8139_private *tp = container_of(napi, struct rtl8139_private, napi);
+ struct net_device *dev = tp->dev;
void __iomem *ioaddr = tp->mmio_addr;
- int orig_budget = min(*budget, dev->quota);
- int done = 1;
+ int work_done;
spin_lock(&tp->rx_lock);
- if (likely(RTL_R16(IntrStatus) & RxAckBits)) {
- int work_done;
-
- work_done = rtl8139_rx(dev, tp, orig_budget);
- if (likely(work_done > 0)) {
- *budget -= work_done;
- dev->quota -= work_done;
- done = (work_done < orig_budget);
- }
- }
+ work_done = 0;
+ if (likely(RTL_R16(IntrStatus) & RxAckBits))
+ work_done += rtl8139_rx(dev, tp, budget);
- if (done) {
+ if (work_done < budget) {
unsigned long flags;
/*
* Order is important since data can get interrupted
* again when we think we are done.
*/
- local_irq_save(flags);
+ spin_lock_irqsave(&tp->lock, flags);
RTL_W16_F(IntrMask, rtl8139_intr_mask);
- __netif_rx_complete(dev);
- local_irq_restore(flags);
+ __netif_rx_complete(dev, napi);
+ spin_unlock_irqrestore(&tp->lock, flags);
}
spin_unlock(&tp->rx_lock);
- return !done;
+ return work_done;
}
/* The interrupt handler does all of the Rx thread work and cleans up
/* Receive packets are processed by poll routine.
If not running start it now. */
if (status & RxAckBits){
- if (netif_rx_schedule_prep(dev)) {
+ if (netif_rx_schedule_prep(dev, &tp->napi)) {
RTL_W16_F (IntrMask, rtl8139_norx_intr_mask);
- __netif_rx_schedule (dev);
+ __netif_rx_schedule(dev, &tp->napi);
}
}
void __iomem *ioaddr = tp->mmio_addr;
unsigned long flags;
- netif_stop_queue (dev);
+ netif_stop_queue(dev);
+ napi_disable(&tp->napi);
if (netif_msg_ifdown(tp))
printk(KERN_DEBUG "%s: Shutting down ethercard, status was 0x%4.4x.\n",
#ifdef CONFIG_AMD8111E_NAPI
/* This function handles the driver receive operation in polling mode */
-static int amd8111e_rx_poll(struct net_device *dev, int * budget)
+static int amd8111e_rx_poll(struct napi_struct *napi, int budget)
{
- struct amd8111e_priv *lp = netdev_priv(dev);
+ struct amd8111e_priv *lp = container_of(napi, struct amd8111e_priv, napi);
+ struct net_device *dev = lp->amd8111e_net_dev;
int rx_index = lp->rx_idx & RX_RING_DR_MOD_MASK;
void __iomem *mmio = lp->mmio;
struct sk_buff *skb,*new_skb;
#if AMD8111E_VLAN_TAG_USED
short vtag;
#endif
- int rx_pkt_limit = dev->quota;
+ int rx_pkt_limit = budget;
unsigned long flags;
do{
} while(intr0 & RINT0);
/* Receive descriptor is empty now */
- dev->quota -= num_rx_pkt;
- *budget -= num_rx_pkt;
-
spin_lock_irqsave(&lp->lock, flags);
- netif_rx_complete(dev);
+ __netif_rx_complete(dev, napi);
writel(VAL0|RINTEN0, mmio + INTEN0);
writel(VAL2 | RDMD0, mmio + CMD0);
spin_unlock_irqrestore(&lp->lock, flags);
- return 0;
rx_not_empty:
- /* Do not call a netif_rx_complete */
- dev->quota -= num_rx_pkt;
- *budget -= num_rx_pkt;
- return 1;
+ return num_rx_pkt;
}
#else
/* Check if Receive Interrupt has occurred. */
#ifdef CONFIG_AMD8111E_NAPI
if(intr0 & RINT0){
- if(netif_rx_schedule_prep(dev)){
+ if(netif_rx_schedule_prep(dev, &lp->napi)){
/* Disable receive interupts */
writel(RINTEN0, mmio + INTEN0);
/* Schedule a polling routine */
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &lp->napi);
}
else if (intren0 & RINTEN0) {
printk("************Driver bug! \
struct amd8111e_priv *lp = netdev_priv(dev);
netif_stop_queue(dev);
+ napi_disable(&lp->napi);
+
spin_lock_irq(&lp->lock);
amd8111e_disable_interrupt(lp);
dev->name, dev))
return -EAGAIN;
+ napi_enable(&lp->napi);
+
spin_lock_irq(&lp->lock);
amd8111e_init_hw_default(lp);
if(amd8111e_restart(dev)){
spin_unlock_irq(&lp->lock);
+ napi_disable(&lp->napi);
if (dev->irq)
free_irq(dev->irq, dev);
return -ENOMEM;
dev->tx_timeout = amd8111e_tx_timeout;
dev->watchdog_timeo = AMD8111E_TX_TIMEOUT;
#ifdef CONFIG_AMD8111E_NAPI
- dev->poll = amd8111e_rx_poll;
- dev->weight = 32;
+ netif_napi_add(dev, &lp->napi, amd8111e_rx_poll, 32);
#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = amd8111e_poll;
/* Reg memory mapped address */
void __iomem *mmio;
+ struct napi_struct napi;
+
spinlock_t lock; /* Guard lock */
unsigned long rx_idx, tx_idx; /* The next free ring entry */
unsigned long tx_complete_idx;
spinlock_t tx_pending_lock;
unsigned int tx_pending;
+ struct net_device *dev;
+ struct napi_struct napi;
+
struct net_device_stats stats;
struct mii_if_info mii;
return &(ep->stats);
}
-static int ep93xx_rx(struct net_device *dev, int *budget)
+static int ep93xx_rx(struct net_device *dev, int processed, int budget)
{
struct ep93xx_priv *ep = netdev_priv(dev);
- int rx_done;
- int processed;
- rx_done = 0;
- processed = 0;
- while (*budget > 0) {
+ while (processed < budget) {
int entry;
struct ep93xx_rstat *rstat;
u32 rstat0;
rstat0 = rstat->rstat0;
rstat1 = rstat->rstat1;
- if (!(rstat0 & RSTAT0_RFP) || !(rstat1 & RSTAT1_RFP)) {
- rx_done = 1;
+ if (!(rstat0 & RSTAT0_RFP) || !(rstat1 & RSTAT1_RFP))
break;
- }
rstat->rstat0 = 0;
rstat->rstat1 = 0;
err:
ep->rx_pointer = (entry + 1) & (RX_QUEUE_ENTRIES - 1);
processed++;
- dev->quota--;
- (*budget)--;
}
if (processed) {
wrw(ep, REG_RXSTSENQ, processed);
}
- return !rx_done;
+ return processed;
}
static int ep93xx_have_more_rx(struct ep93xx_priv *ep)
return !!((rstat->rstat0 & RSTAT0_RFP) && (rstat->rstat1 & RSTAT1_RFP));
}
-static int ep93xx_poll(struct net_device *dev, int *budget)
+static int ep93xx_poll(struct napi_struct *napi, int budget)
{
- struct ep93xx_priv *ep = netdev_priv(dev);
-
- /*
- * @@@ Have to stop polling if device is downed while we
- * are polling.
- */
+ struct ep93xx_priv *ep = container_of(napi, struct ep93xx_priv, napi);
+ struct net_device *dev = ep->dev;
+ int rx = 0;
poll_some_more:
- if (ep93xx_rx(dev, budget))
- return 1;
-
- netif_rx_complete(dev);
-
- spin_lock_irq(&ep->rx_lock);
- wrl(ep, REG_INTEN, REG_INTEN_TX | REG_INTEN_RX);
- if (ep93xx_have_more_rx(ep)) {
- wrl(ep, REG_INTEN, REG_INTEN_TX);
- wrl(ep, REG_INTSTSP, REG_INTSTS_RX);
+ rx = ep93xx_rx(dev, rx, budget);
+ if (rx < budget) {
+ int more = 0;
+
+ spin_lock_irq(&ep->rx_lock);
+ __netif_rx_complete(dev, napi);
+ wrl(ep, REG_INTEN, REG_INTEN_TX | REG_INTEN_RX);
+ if (ep93xx_have_more_rx(ep)) {
+ wrl(ep, REG_INTEN, REG_INTEN_TX);
+ wrl(ep, REG_INTSTSP, REG_INTSTS_RX);
+ more = 1;
+ }
spin_unlock_irq(&ep->rx_lock);
- if (netif_rx_reschedule(dev, 0))
+ if (more && netif_rx_reschedule(dev, napi))
goto poll_some_more;
-
- return 0;
}
- spin_unlock_irq(&ep->rx_lock);
- return 0;
+ return rx;
}
static int ep93xx_xmit(struct sk_buff *skb, struct net_device *dev)
if (status & REG_INTSTS_RX) {
spin_lock(&ep->rx_lock);
- if (likely(__netif_rx_schedule_prep(dev))) {
+ if (likely(__netif_rx_schedule_prep(dev, &ep->napi))) {
wrl(ep, REG_INTEN, REG_INTEN_TX);
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &ep->napi);
}
spin_unlock(&ep->rx_lock);
}
dev->dev_addr[4], dev->dev_addr[5]);
}
+ napi_enable(&ep->napi);
+
if (ep93xx_start_hw(dev)) {
+ napi_disable(&ep->napi);
ep93xx_free_buffers(ep);
return -EIO;
}
err = request_irq(ep->irq, ep93xx_irq, IRQF_SHARED, dev->name, dev);
if (err) {
+ napi_disable(&ep->napi);
ep93xx_stop_hw(dev);
ep93xx_free_buffers(ep);
return err;
{
struct ep93xx_priv *ep = netdev_priv(dev);
+ napi_disable(&ep->napi);
netif_stop_queue(dev);
wrl(ep, REG_GIINTMSK, 0);
dev->get_stats = ep93xx_get_stats;
dev->ethtool_ops = &ep93xx_ethtool_ops;
- dev->poll = ep93xx_poll;
dev->hard_start_xmit = ep93xx_xmit;
dev->open = ep93xx_open;
dev->stop = ep93xx_close;
dev->do_ioctl = ep93xx_ioctl;
dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
- dev->weight = 64;
return dev;
}
goto err_out;
}
ep = netdev_priv(dev);
+ ep->dev = dev;
+ netif_napi_add(dev, &ep->napi, ep93xx_poll, 64);
platform_set_drvdata(pdev, dev);
return received;
}
-static int b44_poll(struct net_device *netdev, int *budget)
+static int b44_poll(struct napi_struct *napi, int budget)
{
- struct b44 *bp = netdev_priv(netdev);
- int done;
+ struct b44 *bp = container_of(napi, struct b44, napi);
+ struct net_device *netdev = bp->dev;
+ int work_done;
spin_lock_irq(&bp->lock);
}
spin_unlock_irq(&bp->lock);
- done = 1;
- if (bp->istat & ISTAT_RX) {
- int orig_budget = *budget;
- int work_done;
-
- if (orig_budget > netdev->quota)
- orig_budget = netdev->quota;
-
- work_done = b44_rx(bp, orig_budget);
-
- *budget -= work_done;
- netdev->quota -= work_done;
-
- if (work_done >= orig_budget)
- done = 0;
- }
+ work_done = 0;
+ if (bp->istat & ISTAT_RX)
+ work_done += b44_rx(bp, budget);
if (bp->istat & ISTAT_ERRORS) {
unsigned long flags;
b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
netif_wake_queue(bp->dev);
spin_unlock_irqrestore(&bp->lock, flags);
- done = 1;
+ work_done = 0;
}
- if (done) {
- netif_rx_complete(netdev);
+ if (work_done < budget) {
+ netif_rx_complete(netdev, napi);
b44_enable_ints(bp);
}
- return (done ? 0 : 1);
+ return work_done;
}
static irqreturn_t b44_interrupt(int irq, void *dev_id)
goto irq_ack;
}
- if (netif_rx_schedule_prep(dev)) {
+ if (netif_rx_schedule_prep(dev, &bp->napi)) {
/* NOTE: These writes are posted by the readback of
* the ISTAT register below.
*/
bp->istat = istat;
__b44_disable_ints(bp);
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &bp->napi);
} else {
printk(KERN_ERR PFX "%s: Error, poll already scheduled\n",
dev->name);
if (err)
goto out;
+ napi_enable(&bp->napi);
+
b44_init_rings(bp);
b44_init_hw(bp, B44_FULL_RESET);
err = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
if (unlikely(err < 0)) {
+ napi_disable(&bp->napi);
b44_chip_reset(bp);
b44_free_rings(bp);
b44_free_consistent(bp);
netif_stop_queue(dev);
- netif_poll_disable(dev);
+ napi_disable(&bp->napi);
del_timer_sync(&bp->timer);
free_irq(dev->irq, dev);
- netif_poll_enable(dev);
-
if (bp->flags & B44_FLAG_WOL_ENABLE) {
b44_init_hw(bp, B44_PARTIAL_RESET);
b44_setup_wol(bp);
dev->set_mac_address = b44_set_mac_addr;
dev->do_ioctl = b44_ioctl;
dev->tx_timeout = b44_tx_timeout;
- dev->poll = b44_poll;
- dev->weight = 64;
+ netif_napi_add(dev, &bp->napi, b44_poll, 64);
dev->watchdog_timeo = B44_TX_TIMEOUT;
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = b44_poll_controller;
struct ring_info *rx_buffers;
struct ring_info *tx_buffers;
+ struct napi_struct napi;
+
u32 dma_offset;
u32 flags;
#define B44_FLAG_B0_ANDLATER 0x00000001
{
bnx2_disable_int_sync(bp);
if (netif_running(bp->dev)) {
- netif_poll_disable(bp->dev);
+ napi_disable(&bp->napi);
netif_tx_disable(bp->dev);
bp->dev->trans_start = jiffies; /* prevent tx timeout */
}
if (atomic_dec_and_test(&bp->intr_sem)) {
if (netif_running(bp->dev)) {
netif_wake_queue(bp->dev);
- netif_poll_enable(bp->dev);
+ napi_enable(&bp->napi);
bnx2_enable_int(bp);
}
}
if (unlikely(atomic_read(&bp->intr_sem) != 0))
return IRQ_HANDLED;
- netif_rx_schedule(dev);
+ netif_rx_schedule(dev, &bp->napi);
return IRQ_HANDLED;
}
if (unlikely(atomic_read(&bp->intr_sem) != 0))
return IRQ_HANDLED;
- netif_rx_schedule(dev);
+ netif_rx_schedule(dev, &bp->napi);
return IRQ_HANDLED;
}
if (unlikely(atomic_read(&bp->intr_sem) != 0))
return IRQ_HANDLED;
- if (netif_rx_schedule_prep(dev)) {
+ if (netif_rx_schedule_prep(dev, &bp->napi)) {
bp->last_status_idx = sblk->status_idx;
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &bp->napi);
}
return IRQ_HANDLED;
}
static int
-bnx2_poll(struct net_device *dev, int *budget)
+bnx2_poll(struct napi_struct *napi, int budget)
{
- struct bnx2 *bp = netdev_priv(dev);
+ struct bnx2 *bp = container_of(napi, struct bnx2, napi);
+ struct net_device *dev = bp->dev;
struct status_block *sblk = bp->status_blk;
u32 status_attn_bits = sblk->status_attn_bits;
u32 status_attn_bits_ack = sblk->status_attn_bits_ack;
+ int work_done = 0;
if ((status_attn_bits & STATUS_ATTN_EVENTS) !=
(status_attn_bits_ack & STATUS_ATTN_EVENTS)) {
if (bp->status_blk->status_tx_quick_consumer_index0 != bp->hw_tx_cons)
bnx2_tx_int(bp);
- if (bp->status_blk->status_rx_quick_consumer_index0 != bp->hw_rx_cons) {
- int orig_budget = *budget;
- int work_done;
-
- if (orig_budget > dev->quota)
- orig_budget = dev->quota;
-
- work_done = bnx2_rx_int(bp, orig_budget);
- *budget -= work_done;
- dev->quota -= work_done;
- }
+ if (bp->status_blk->status_rx_quick_consumer_index0 != bp->hw_rx_cons)
+ work_done = bnx2_rx_int(bp, budget);
bp->last_status_idx = bp->status_blk->status_idx;
rmb();
if (!bnx2_has_work(bp)) {
- netif_rx_complete(dev);
+ netif_rx_complete(dev, napi);
if (likely(bp->flags & USING_MSI_FLAG)) {
REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD,
BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID |
REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD,
BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID |
bp->last_status_idx);
- return 0;
}
- return 1;
+ return work_done;
}
/* Called with rtnl_lock from vlan functions and also netif_tx_lock
if (rc)
return rc;
+ napi_enable(&bp->napi);
+
if ((bp->flags & MSI_CAP_FLAG) && !disable_msi) {
if (pci_enable_msi(bp->pdev) == 0) {
bp->flags |= USING_MSI_FLAG;
rc = bnx2_request_irq(bp);
if (rc) {
+ napi_disable(&bp->napi);
bnx2_free_mem(bp);
return rc;
}
rc = bnx2_init_nic(bp);
if (rc) {
+ napi_disable(&bp->napi);
bnx2_free_irq(bp);
bnx2_free_skbs(bp);
bnx2_free_mem(bp);
rc = bnx2_request_irq(bp);
if (rc) {
+ napi_disable(&bp->napi);
bnx2_free_skbs(bp);
bnx2_free_mem(bp);
del_timer_sync(&bp->timer);
while (bp->in_reset_task)
msleep(1);
- bnx2_netif_stop(bp);
+ bnx2_disable_int_sync(bp);
+ napi_disable(&bp->napi);
del_timer_sync(&bp->timer);
if (bp->flags & NO_WOL_FLAG)
reset_code = BNX2_DRV_MSG_CODE_UNLOAD_LNK_DN;
#ifdef BCM_VLAN
dev->vlan_rx_register = bnx2_vlan_rx_register;
#endif
- dev->poll = bnx2_poll;
dev->ethtool_ops = &bnx2_ethtool_ops;
- dev->weight = 64;
bp = netdev_priv(dev);
+ netif_napi_add(dev, &bp->napi, bnx2_poll, 64);
#if defined(HAVE_POLL_CONTROLLER) || defined(CONFIG_NET_POLL_CONTROLLER)
dev->poll_controller = poll_bnx2;
struct net_device *dev;
struct pci_dev *pdev;
+ struct napi_struct napi;
+
atomic_t intr_sem;
struct status_block *status_blk;
if (status & INTR_RX_DONE_ALT) { /* handle rx separately */
#ifdef USE_NAPI
cas_mask_intr(cp);
- netif_rx_schedule(dev);
+ netif_rx_schedule(dev, &cp->napi);
#else
cas_rx_ringN(cp, ring, 0);
#endif
if (status & INTR_RX_DONE_ALT) { /* handle rx separately */
#ifdef USE_NAPI
cas_mask_intr(cp);
- netif_rx_schedule(dev);
+ netif_rx_schedule(dev, &cp->napi);
#else
cas_rx_ringN(cp, 1, 0);
#endif
if (status & INTR_RX_DONE) {
#ifdef USE_NAPI
cas_mask_intr(cp);
- netif_rx_schedule(dev);
+ netif_rx_schedule(dev, &cp->napi);
#else
cas_rx_ringN(cp, 0, 0);
#endif
#ifdef USE_NAPI
-static int cas_poll(struct net_device *dev, int *budget)
+static int cas_poll(struct napi_struct *napi, int budget)
{
- struct cas *cp = netdev_priv(dev);
+ struct cas *cp = container_of(napi, struct cas, napi);
+ struct net_device *dev = cp->dev;
int i, enable_intr, todo, credits;
u32 status = readl(cp->regs + REG_INTR_STATUS);
unsigned long flags;
/* NAPI rx packets. we spread the credits across all of the
* rxc rings
- */
- todo = min(*budget, dev->quota);
-
- /* to make sure we're fair with the work we loop through each
+ *
+ * to make sure we're fair with the work we loop through each
* ring N_RX_COMP_RING times with a request of
- * todo / N_RX_COMP_RINGS
+ * budget / N_RX_COMP_RINGS
*/
enable_intr = 1;
credits = 0;
for (i = 0; i < N_RX_COMP_RINGS; i++) {
int j;
for (j = 0; j < N_RX_COMP_RINGS; j++) {
- credits += cas_rx_ringN(cp, j, todo / N_RX_COMP_RINGS);
- if (credits >= todo) {
+ credits += cas_rx_ringN(cp, j, budget / N_RX_COMP_RINGS);
+ if (credits >= budget) {
enable_intr = 0;
goto rx_comp;
}
}
rx_comp:
- *budget -= credits;
- dev->quota -= credits;
-
/* final rx completion */
spin_lock_irqsave(&cp->lock, flags);
if (status)
#endif
spin_unlock_irqrestore(&cp->lock, flags);
if (enable_intr) {
- netif_rx_complete(dev);
+ netif_rx_complete(dev, napi);
cas_unmask_intr(cp);
- return 0;
}
- return 1;
+ return credits;
}
#endif
goto err_spare;
}
+#ifdef USE_NAPI
+ napi_enable(&cp->napi);
+#endif
/* init hw */
cas_lock_all_save(cp, flags);
cas_clean_rings(cp);
unsigned long flags;
struct cas *cp = netdev_priv(dev);
+#ifdef USE_NAPI
+ napi_enable(&cp->napi);
+#endif
/* Make sure we don't get distracted by suspend/resume */
mutex_lock(&cp->pm_mutex);
dev->watchdog_timeo = CAS_TX_TIMEOUT;
dev->change_mtu = cas_change_mtu;
#ifdef USE_NAPI
- dev->poll = cas_poll;
- dev->weight = 64;
+ netif_napi_add(dev, &cp->napi, cas_poll, 64);
#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = cas_netpoll;
int rx_cur[N_RX_COMP_RINGS], rx_new[N_RX_COMP_RINGS];
int rx_last[N_RX_DESC_RINGS];
+ struct napi_struct napi;
+
/* Set when chip is actually in operational state
* (ie. not power managed) */
int hw_running;
struct peespi *espi;
struct petp *tp;
+ struct napi_struct napi;
struct port_info port[MAX_NPORTS];
struct delayed_work stats_update_task;
struct timer_list stats_update_timer;
struct adapter *adapter = dev->priv;
int other_ports = adapter->open_device_map & PORT_MASK;
- if (!adapter->open_device_map && (err = cxgb_up(adapter)) < 0)
+ napi_enable(&adapter->napi);
+ if (!adapter->open_device_map && (err = cxgb_up(adapter)) < 0) {
+ napi_disable(&adapter->napi);
return err;
+ }
__set_bit(dev->if_port, &adapter->open_device_map);
link_start(&adapter->port[dev->if_port]);
struct cmac *mac = p->mac;
netif_stop_queue(dev);
+ napi_disable(&adapter->napi);
mac->ops->disable(mac, MAC_DIRECTION_TX | MAC_DIRECTION_RX);
netif_carrier_off(dev);
netdev->poll_controller = t1_netpoll;
#endif
#ifdef CONFIG_CHELSIO_T1_NAPI
- netdev->weight = 64;
- netdev->poll = t1_poll;
+ netif_napi_add(netdev, &adapter->napi, t1_poll, 64);
#endif
SET_ETHTOOL_OPS(netdev, &t1_ethtool_ops);
* or protection from interrupts as data interrupts are off at this point and
* other adapter interrupts do not interfere.
*/
-int t1_poll(struct net_device *dev, int *budget)
+int t1_poll(struct napi_struct *napi, int budget)
{
- struct adapter *adapter = dev->priv;
+ struct adapter *adapter = container_of(napi, struct adapter, napi);
+ struct net_device *dev = adapter->port[0].dev;
int work_done;
- work_done = process_responses(adapter, min(*budget, dev->quota));
- *budget -= work_done;
- dev->quota -= work_done;
-
- if (unlikely(responses_pending(adapter)))
- return 1;
-
- netif_rx_complete(dev);
- writel(adapter->sge->respQ.cidx, adapter->regs + A_SG_SLEEPING);
-
- return 0;
+ work_done = process_responses(adapter, budget);
+ if (likely(!responses_pending(adapter))) {
+ netif_rx_complete(dev, napi);
+ writel(adapter->sge->respQ.cidx,
+ adapter->regs + A_SG_SLEEPING);
+ }
+ return work_done;
}
/*
writel(F_PL_INTR_SGE_DATA, adapter->regs + A_PL_CAUSE);
- if (__netif_rx_schedule_prep(dev)) {
+ if (napi_schedule_prep(&adapter->napi)) {
if (process_pure_responses(adapter))
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &adapter->napi);
else {
/* no data, no NAPI needed */
writel(sge->respQ.cidx, adapter->regs + A_SG_SLEEPING);
- netif_poll_enable(dev); /* undo schedule_prep */
+ napi_enable(&adapter->napi); /* undo schedule_prep */
}
}
return IRQ_HANDLED;
int t1_sge_set_coalesce_params(struct sge *, struct sge_params *);
void t1_sge_destroy(struct sge *);
irqreturn_t t1_interrupt(int irq, void *cookie);
-int t1_poll(struct net_device *, int *);
+int t1_poll(struct napi_struct *, int);
int t1_start_xmit(struct sk_buff *skb, struct net_device *dev);
void t1_set_vlan_accel(struct adapter *adapter, int on_off);
typedef irqreturn_t(*intr_handler_t) (int, void *);
struct vlan_group;
-
struct adapter;
+struct sge_qset;
+
struct port_info {
struct adapter *adapter;
struct vlan_group *vlan_grp;
+ struct sge_qset *qs;
const struct port_type_info *port_type;
u8 port_id;
u8 rx_csum_offload;
};
struct sge_qset { /* an SGE queue set */
+ struct adapter *adap;
+ struct napi_struct napi;
struct sge_rspq rspq;
struct sge_fl fl[SGE_RXQ_PER_SET];
struct sge_txq txq[SGE_TXQ_PER_SET];
- struct net_device *netdev; /* associated net device */
+ struct net_device *netdev;
unsigned long txq_stopped; /* which Tx queues are stopped */
struct timer_list tx_reclaim_timer; /* reclaims TX buffers */
unsigned long port_stats[SGE_PSTAT_MAX];
struct delayed_work adap_check_task;
struct work_struct ext_intr_handler_task;
- /*
- * Dummy netdevices are needed when using multiple receive queues with
- * NAPI as each netdevice can service only one queue.
- */
- struct net_device *dummy_netdev[SGE_QSETS - 1];
-
struct dentry *debugfs_root;
struct mutex mdio_lock;
return netdev_priv(adap->port[idx]);
}
-/*
- * We use the spare atalk_ptr to map a net device to its SGE queue set.
- * This is a macro so it can be used as l-value.
- */
-#define dev2qset(netdev) ((netdev)->atalk_ptr)
-
#define OFFLOAD_DEVMAP_BIT 15
#define tdev2adap(d) container_of(d, struct adapter, tdev)
void t3_update_qset_coalesce(struct sge_qset *qs, const struct qset_params *p);
int t3_sge_alloc_qset(struct adapter *adapter, unsigned int id, int nports,
int irq_vec_idx, const struct qset_params *p,
- int ntxq, struct net_device *netdev);
+ int ntxq, struct net_device *dev);
int t3_get_desc(const struct sge_qset *qs, unsigned int qnum, unsigned int idx,
unsigned char *data);
irqreturn_t t3_sge_intr_msix(int irq, void *cookie);
V_RRCPLCPUSIZE(6), cpus, rspq_map);
}
-/*
- * If we have multiple receive queues per port serviced by NAPI we need one
- * netdevice per queue as NAPI operates on netdevices. We already have one
- * netdevice, namely the one associated with the interface, so we use dummy
- * ones for any additional queues. Note that these netdevices exist purely
- * so that NAPI has something to work with, they do not represent network
- * ports and are not registered.
- */
-static int init_dummy_netdevs(struct adapter *adap)
+static void init_napi(struct adapter *adap)
{
- int i, j, dummy_idx = 0;
- struct net_device *nd;
-
- for_each_port(adap, i) {
- struct net_device *dev = adap->port[i];
- const struct port_info *pi = netdev_priv(dev);
-
- for (j = 0; j < pi->nqsets - 1; j++) {
- if (!adap->dummy_netdev[dummy_idx]) {
- struct port_info *p;
-
- nd = alloc_netdev(sizeof(*p), "", ether_setup);
- if (!nd)
- goto free_all;
+ int i;
- p = netdev_priv(nd);
- p->adapter = adap;
- nd->weight = 64;
- set_bit(__LINK_STATE_START, &nd->state);
- adap->dummy_netdev[dummy_idx] = nd;
- }
- strcpy(adap->dummy_netdev[dummy_idx]->name, dev->name);
- dummy_idx++;
- }
- }
- return 0;
+ for (i = 0; i < SGE_QSETS; i++) {
+ struct sge_qset *qs = &adap->sge.qs[i];
-free_all:
- while (--dummy_idx >= 0) {
- free_netdev(adap->dummy_netdev[dummy_idx]);
- adap->dummy_netdev[dummy_idx] = NULL;
+ if (qs->adap)
+ netif_napi_add(qs->netdev, &qs->napi, qs->napi.poll,
+ 64);
}
- return -ENOMEM;
}
/*
static void quiesce_rx(struct adapter *adap)
{
int i;
- struct net_device *dev;
- for_each_port(adap, i) {
- dev = adap->port[i];
- while (test_bit(__LINK_STATE_RX_SCHED, &dev->state))
- msleep(1);
- }
+ for (i = 0; i < SGE_QSETS; i++)
+ if (adap->sge.qs[i].adap)
+ napi_disable(&adap->sge.qs[i].napi);
+}
- for (i = 0; i < ARRAY_SIZE(adap->dummy_netdev); i++) {
- dev = adap->dummy_netdev[i];
- if (dev)
- while (test_bit(__LINK_STATE_RX_SCHED, &dev->state))
- msleep(1);
- }
+static void enable_all_napi(struct adapter *adap)
+{
+ int i;
+ for (i = 0; i < SGE_QSETS; i++)
+ if (adap->sge.qs[i].adap)
+ napi_enable(&adap->sge.qs[i].napi);
}
/**
*/
static int setup_sge_qsets(struct adapter *adap)
{
- int i, j, err, irq_idx = 0, qset_idx = 0, dummy_dev_idx = 0;
+ int i, j, err, irq_idx = 0, qset_idx = 0;
unsigned int ntxq = SGE_TXQ_PER_SET;
if (adap->params.rev > 0 && !(adap->flags & USING_MSI))
for_each_port(adap, i) {
struct net_device *dev = adap->port[i];
- const struct port_info *pi = netdev_priv(dev);
+ struct port_info *pi = netdev_priv(dev);
+ pi->qs = &adap->sge.qs[pi->first_qset];
for (j = 0; j < pi->nqsets; ++j, ++qset_idx) {
err = t3_sge_alloc_qset(adap, qset_idx, 1,
(adap->flags & USING_MSIX) ? qset_idx + 1 :
irq_idx,
- &adap->params.sge.qset[qset_idx], ntxq,
- j == 0 ? dev :
- adap-> dummy_netdev[dummy_dev_idx++]);
+ &adap->params.sge.qset[qset_idx], ntxq, dev);
if (err) {
t3_free_sge_resources(adap);
return err;
goto out;
}
- err = init_dummy_netdevs(adap);
- if (err)
- goto out;
-
err = t3_init_hw(adap, 0);
if (err)
goto out;
t3_write_reg(adap, A_ULPRX_TDDP_PSZ, V_HPZ0(PAGE_SHIFT - 12));
-
+
err = setup_sge_qsets(adap);
if (err)
goto out;
setup_rss(adap);
+ init_napi(adap);
adap->flags |= FULL_INIT_DONE;
}
adap->name, adap)))
goto irq_err;
+ enable_all_napi(adap);
t3_sge_start(adap);
t3_intr_enable(adap);
int other_ports = adapter->open_device_map & PORT_MASK;
int err;
- if (!adapter->open_device_map && (err = cxgb_up(adapter)) < 0)
+ if (!adapter->open_device_map && (err = cxgb_up(adapter)) < 0) {
+ quiesce_rx(adapter);
return err;
+ }
set_bit(pi->port_id, &adapter->open_device_map);
if (is_offload(adapter) && !ofld_disable) {
#ifdef CONFIG_NET_POLL_CONTROLLER
netdev->poll_controller = cxgb_netpoll;
#endif
- netdev->weight = 64;
SET_ETHTOOL_OPS(netdev, &cxgb_ethtool_ops);
}
t3_free_sge_resources(adapter);
cxgb_disable_msi(adapter);
- for (i = 0; i < ARRAY_SIZE(adapter->dummy_netdev); i++)
- if (adapter->dummy_netdev[i]) {
- free_netdev(adapter->dummy_netdev[i]);
- adapter->dummy_netdev[i] = NULL;
- }
-
for_each_port(adapter, i)
if (adapter->port[i])
free_netdev(adapter->port[i]);
q->rspq.desc, q->rspq.phys_addr);
}
- if (q->netdev)
- q->netdev->atalk_ptr = NULL;
-
memset(q, 0, sizeof(*q));
}
unsigned int ndesc, pidx, credits, gen, compl;
const struct port_info *pi = netdev_priv(dev);
struct adapter *adap = pi->adapter;
- struct sge_qset *qs = dev2qset(dev);
+ struct sge_qset *qs = pi->qs;
struct sge_txq *q = &qs->txq[TXQ_ETH];
/*
struct sk_buff *skb;
struct sge_qset *qs = (struct sge_qset *)data;
struct sge_txq *q = &qs->txq[TXQ_CTRL];
- const struct port_info *pi = netdev_priv(qs->netdev);
- struct adapter *adap = pi->adapter;
spin_lock(&q->lock);
again:reclaim_completed_tx_imm(q);
- while (q->in_use < q->size && (skb = __skb_dequeue(&q->sendq)) != NULL) {
+ while (q->in_use < q->size &&
+ (skb = __skb_dequeue(&q->sendq)) != NULL) {
write_imm(&q->desc[q->pidx], skb, skb->len, q->gen);
}
spin_unlock(&q->lock);
- t3_write_reg(adap, A_SG_KDOORBELL,
+ t3_write_reg(qs->adap, A_SG_KDOORBELL,
F_SELEGRCNTX | V_EGRCNTX(q->cntxt_id));
}
else {
struct sge_qset *qs = rspq_to_qset(q);
- if (__netif_rx_schedule_prep(qs->netdev))
- __netif_rx_schedule(qs->netdev);
+ napi_schedule(&qs->napi);
q->rx_head = skb;
}
q->rx_tail = skb;
* receive handler. Batches need to be of modest size as we do prefetches
* on the packets in each.
*/
-static int ofld_poll(struct net_device *dev, int *budget)
+static int ofld_poll(struct napi_struct *napi, int budget)
{
- const struct port_info *pi = netdev_priv(dev);
- struct adapter *adapter = pi->adapter;
- struct sge_qset *qs = dev2qset(dev);
+ struct sge_qset *qs = container_of(napi, struct sge_qset, napi);
struct sge_rspq *q = &qs->rspq;
- int work_done, limit = min(*budget, dev->quota), avail = limit;
+ struct adapter *adapter = qs->adap;
+ int work_done = 0;
- while (avail) {
+ while (work_done < budget) {
struct sk_buff *head, *tail, *skbs[RX_BUNDLE_SIZE];
int ngathered;
spin_lock_irq(&q->lock);
head = q->rx_head;
if (!head) {
- work_done = limit - avail;
- *budget -= work_done;
- dev->quota -= work_done;
- __netif_rx_complete(dev);
+ napi_complete(napi);
spin_unlock_irq(&q->lock);
- return 0;
+ return work_done;
}
tail = q->rx_tail;
q->rx_head = q->rx_tail = NULL;
spin_unlock_irq(&q->lock);
- for (ngathered = 0; avail && head; avail--) {
+ for (ngathered = 0; work_done < budget && head; work_done++) {
prefetch(head->data);
skbs[ngathered] = head;
head = head->next;
}
deliver_partial_bundle(&adapter->tdev, q, skbs, ngathered);
}
- work_done = limit - avail;
- *budget -= work_done;
- dev->quota -= work_done;
- return 1;
+
+ return work_done;
}
/**
/**
* napi_rx_handler - the NAPI handler for Rx processing
- * @dev: the net device
+ * @napi: the napi instance
* @budget: how many packets we can process in this round
*
* Handler for new data events when using NAPI.
*/
-static int napi_rx_handler(struct net_device *dev, int *budget)
+static int napi_rx_handler(struct napi_struct *napi, int budget)
{
- const struct port_info *pi = netdev_priv(dev);
- struct adapter *adap = pi->adapter;
- struct sge_qset *qs = dev2qset(dev);
- int effective_budget = min(*budget, dev->quota);
-
- int work_done = process_responses(adap, qs, effective_budget);
- *budget -= work_done;
- dev->quota -= work_done;
+ struct sge_qset *qs = container_of(napi, struct sge_qset, napi);
+ struct adapter *adap = qs->adap;
+ int work_done = process_responses(adap, qs, budget);
- if (work_done >= effective_budget)
- return 1;
-
- netif_rx_complete(dev);
+ if (likely(work_done < budget)) {
+ napi_complete(napi);
- /*
- * Because we don't atomically flush the following write it is
- * possible that in very rare cases it can reach the device in a way
- * that races with a new response being written plus an error interrupt
- * causing the NAPI interrupt handler below to return unhandled status
- * to the OS. To protect against this would require flushing the write
- * and doing both the write and the flush with interrupts off. Way too
- * expensive and unjustifiable given the rarity of the race.
- *
- * The race cannot happen at all with MSI-X.
- */
- t3_write_reg(adap, A_SG_GTS, V_RSPQ(qs->rspq.cntxt_id) |
- V_NEWTIMER(qs->rspq.next_holdoff) |
- V_NEWINDEX(qs->rspq.cidx));
- return 0;
+ /*
+ * Because we don't atomically flush the following
+ * write it is possible that in very rare cases it can
+ * reach the device in a way that races with a new
+ * response being written plus an error interrupt
+ * causing the NAPI interrupt handler below to return
+ * unhandled status to the OS. To protect against
+ * this would require flushing the write and doing
+ * both the write and the flush with interrupts off.
+ * Way too expensive and unjustifiable given the
+ * rarity of the race.
+ *
+ * The race cannot happen at all with MSI-X.
+ */
+ t3_write_reg(adap, A_SG_GTS, V_RSPQ(qs->rspq.cntxt_id) |
+ V_NEWTIMER(qs->rspq.next_holdoff) |
+ V_NEWINDEX(qs->rspq.cidx));
+ }
+ return work_done;
}
/*
* Returns true if the device is already scheduled for polling.
*/
-static inline int napi_is_scheduled(struct net_device *dev)
+static inline int napi_is_scheduled(struct napi_struct *napi)
{
- return test_bit(__LINK_STATE_RX_SCHED, &dev->state);
+ return test_bit(NAPI_STATE_SCHED, &napi->state);
}
/**
V_NEWTIMER(q->holdoff_tmr) | V_NEWINDEX(q->cidx));
return 0;
}
- if (likely(__netif_rx_schedule_prep(qs->netdev)))
- __netif_rx_schedule(qs->netdev);
+ napi_schedule(&qs->napi);
return 1;
}
irqreturn_t t3_sge_intr_msix(int irq, void *cookie)
{
struct sge_qset *qs = cookie;
- const struct port_info *pi = netdev_priv(qs->netdev);
- struct adapter *adap = pi->adapter;
+ struct adapter *adap = qs->adap;
struct sge_rspq *q = &qs->rspq;
spin_lock(&q->lock);
irqreturn_t t3_sge_intr_msix_napi(int irq, void *cookie)
{
struct sge_qset *qs = cookie;
- const struct port_info *pi = netdev_priv(qs->netdev);
- struct adapter *adap = pi->adapter;
struct sge_rspq *q = &qs->rspq;
spin_lock(&q->lock);
- if (handle_responses(adap, q) < 0)
+ if (handle_responses(qs->adap, q) < 0)
q->unhandled_irqs++;
spin_unlock(&q->lock);
return IRQ_HANDLED;
return IRQ_HANDLED;
}
-static int rspq_check_napi(struct net_device *dev, struct sge_rspq *q)
+static int rspq_check_napi(struct sge_qset *qs)
{
- if (!napi_is_scheduled(dev) && is_new_response(&q->desc[q->cidx], q)) {
- if (likely(__netif_rx_schedule_prep(dev)))
- __netif_rx_schedule(dev);
+ struct sge_rspq *q = &qs->rspq;
+
+ if (!napi_is_scheduled(&qs->napi) &&
+ is_new_response(&q->desc[q->cidx], q)) {
+ napi_schedule(&qs->napi);
return 1;
}
return 0;
spin_lock(&q->lock);
- new_packets = rspq_check_napi(adap->sge.qs[0].netdev, q);
+ new_packets = rspq_check_napi(&adap->sge.qs[0]);
if (adap->params.nports == 2)
- new_packets += rspq_check_napi(adap->sge.qs[1].netdev,
- &adap->sge.qs[1].rspq);
+ new_packets += rspq_check_napi(&adap->sge.qs[1]);
if (!new_packets && t3_slow_intr_handler(adap) == 0)
q->unhandled_irqs++;
static irqreturn_t t3b_intr_napi(int irq, void *cookie)
{
u32 map;
- struct net_device *dev;
struct adapter *adap = cookie;
- struct sge_rspq *q0 = &adap->sge.qs[0].rspq;
+ struct sge_qset *qs0 = &adap->sge.qs[0];
+ struct sge_rspq *q0 = &qs0->rspq;
t3_write_reg(adap, A_PL_CLI, 0);
map = t3_read_reg(adap, A_SG_DATA_INTR);
if (unlikely(map & F_ERRINTR))
t3_slow_intr_handler(adap);
- if (likely(map & 1)) {
- dev = adap->sge.qs[0].netdev;
-
- if (likely(__netif_rx_schedule_prep(dev)))
- __netif_rx_schedule(dev);
- }
- if (map & 2) {
- dev = adap->sge.qs[1].netdev;
+ if (likely(map & 1))
+ napi_schedule(&qs0->napi);
- if (likely(__netif_rx_schedule_prep(dev)))
- __netif_rx_schedule(dev);
- }
+ if (map & 2)
+ napi_schedule(&adap->sge.qs[1].napi);
spin_unlock(&q0->lock);
return IRQ_HANDLED;
{
spinlock_t *lock;
struct sge_qset *qs = (struct sge_qset *)data;
- const struct port_info *pi = netdev_priv(qs->netdev);
- struct adapter *adap = pi->adapter;
+ struct adapter *adap = qs->adap;
if (spin_trylock(&qs->txq[TXQ_ETH].lock)) {
reclaim_completed_tx(adap, &qs->txq[TXQ_ETH]);
spin_unlock(&qs->txq[TXQ_OFLD].lock);
}
lock = (adap->flags & USING_MSIX) ? &qs->rspq.lock :
- &adap->sge.qs[0].rspq.lock;
+ &adap->sge.qs[0].rspq.lock;
if (spin_trylock_irq(lock)) {
- if (!napi_is_scheduled(qs->netdev)) {
+ if (!napi_is_scheduled(&qs->napi)) {
u32 status = t3_read_reg(adap, A_SG_RSPQ_FL_STATUS);
if (qs->fl[0].credits < qs->fl[0].size)
*/
void t3_update_qset_coalesce(struct sge_qset *qs, const struct qset_params *p)
{
- if (!qs->netdev)
- return;
-
qs->rspq.holdoff_tmr = max(p->coalesce_usecs * 10, 1U);/* can't be 0 */
qs->rspq.polling = p->polling;
- qs->netdev->poll = p->polling ? napi_rx_handler : ofld_poll;
+ qs->napi.poll = p->polling ? napi_rx_handler : ofld_poll;
}
/**
*/
int t3_sge_alloc_qset(struct adapter *adapter, unsigned int id, int nports,
int irq_vec_idx, const struct qset_params *p,
- int ntxq, struct net_device *netdev)
+ int ntxq, struct net_device *dev)
{
int i, ret = -ENOMEM;
struct sge_qset *q = &adapter->sge.qs[id];
}
spin_unlock(&adapter->sge.reg_lock);
- q->netdev = netdev;
- t3_update_qset_coalesce(q, p);
- /*
- * We use atalk_ptr as a backpointer to a qset. In case a device is
- * associated with multiple queue sets only the first one sets
- * atalk_ptr.
- */
- if (netdev->atalk_ptr == NULL)
- netdev->atalk_ptr = q;
+ q->adap = adapter;
+ q->netdev = dev;
+ t3_update_qset_coalesce(q, p);
refill_fl(adapter, &q->fl[0], q->fl[0].size, GFP_KERNEL);
refill_fl(adapter, &q->fl[1], q->fl[1].size, GFP_KERNEL);
struct csr __iomem *csr;
enum scb_cmd_lo cuc_cmd;
unsigned int cbs_avail;
+ struct napi_struct napi;
struct cb *cbs;
struct cb *cb_to_use;
struct cb *cb_to_send;
if(stat_ack & stat_ack_rnr)
nic->ru_running = RU_SUSPENDED;
- if(likely(netif_rx_schedule_prep(netdev))) {
+ if(likely(netif_rx_schedule_prep(netdev, &nic->napi))) {
e100_disable_irq(nic);
- __netif_rx_schedule(netdev);
+ __netif_rx_schedule(netdev, &nic->napi);
}
return IRQ_HANDLED;
}
-static int e100_poll(struct net_device *netdev, int *budget)
+static int e100_poll(struct napi_struct *napi, int budget)
{
- struct nic *nic = netdev_priv(netdev);
- unsigned int work_to_do = min(netdev->quota, *budget);
- unsigned int work_done = 0;
+ struct nic *nic = container_of(napi, struct nic, napi);
+ struct net_device *netdev = nic->netdev;
+ int work_done = 0;
int tx_cleaned;
- e100_rx_clean(nic, &work_done, work_to_do);
+ e100_rx_clean(nic, &work_done, budget);
tx_cleaned = e100_tx_clean(nic);
/* If no Rx and Tx cleanup work was done, exit polling mode. */
if((!tx_cleaned && (work_done == 0)) || !netif_running(netdev)) {
- netif_rx_complete(netdev);
+ netif_rx_complete(netdev, napi);
e100_enable_irq(nic);
- return 0;
}
- *budget -= work_done;
- netdev->quota -= work_done;
-
- return 1;
+ return work_done;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
nic->netdev->name, nic->netdev)))
goto err_no_irq;
netif_wake_queue(nic->netdev);
- netif_poll_enable(nic->netdev);
+ napi_enable(&nic->napi);
/* enable ints _after_ enabling poll, preventing a race between
* disable ints+schedule */
e100_enable_irq(nic);
static void e100_down(struct nic *nic)
{
/* wait here for poll to complete */
- netif_poll_disable(nic->netdev);
+ napi_disable(&nic->napi);
netif_stop_queue(nic->netdev);
e100_hw_reset(nic);
free_irq(nic->pdev->irq, nic->netdev);
SET_ETHTOOL_OPS(netdev, &e100_ethtool_ops);
netdev->tx_timeout = e100_tx_timeout;
netdev->watchdog_timeo = E100_WATCHDOG_PERIOD;
- netdev->poll = e100_poll;
- netdev->weight = E100_NAPI_WEIGHT;
#ifdef CONFIG_NET_POLL_CONTROLLER
netdev->poll_controller = e100_netpoll;
#endif
strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
nic = netdev_priv(netdev);
+ netif_napi_add(netdev, &nic->napi, e100_poll, E100_NAPI_WEIGHT);
nic->netdev = netdev;
nic->pdev = pdev;
nic->msg_enable = (1 << debug) - 1;
struct nic *nic = netdev_priv(netdev);
if (netif_running(netdev))
- netif_poll_disable(nic->netdev);
+ napi_disable(&nic->napi);
del_timer_sync(&nic->watchdog);
netif_carrier_off(nic->netdev);
netif_device_detach(netdev);
struct nic *nic = netdev_priv(netdev);
if (netif_running(netdev))
- netif_poll_disable(nic->netdev);
+ napi_disable(&nic->napi);
del_timer_sync(&nic->watchdog);
netif_carrier_off(nic->netdev);
static pci_ers_result_t e100_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
{
struct net_device *netdev = pci_get_drvdata(pdev);
+ struct nic *nic = netdev_priv(netdev);
/* Similar to calling e100_down(), but avoids adpater I/O. */
netdev->stop(netdev);
/* Detach; put netif into state similar to hotplug unplug. */
- netif_poll_enable(netdev);
+ napi_enable(&nic->napi);
netif_device_detach(netdev);
pci_disable_device(pdev);
int cleaned_count);
struct e1000_rx_ring *rx_ring; /* One per active queue */
#ifdef CONFIG_E1000_NAPI
+ struct napi_struct napi;
struct net_device *polling_netdev; /* One per active queue */
#endif
int num_tx_queues;
static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
struct e1000_tx_ring *tx_ring);
#ifdef CONFIG_E1000_NAPI
-static int e1000_clean(struct net_device *poll_dev, int *budget);
+static int e1000_clean(struct napi_struct *napi, int budget);
static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring,
int *work_done, int work_to_do);
clear_bit(__E1000_DOWN, &adapter->flags);
#ifdef CONFIG_E1000_NAPI
- netif_poll_enable(adapter->netdev);
+ napi_enable(&adapter->napi);
#endif
e1000_irq_enable(adapter);
set_bit(__E1000_DOWN, &adapter->flags);
#ifdef CONFIG_E1000_NAPI
- netif_poll_disable(netdev);
+ napi_disable(&adapter->napi);
#endif
e1000_irq_disable(adapter);
netdev->tx_timeout = &e1000_tx_timeout;
netdev->watchdog_timeo = 5 * HZ;
#ifdef CONFIG_E1000_NAPI
- netdev->poll = &e1000_clean;
- netdev->weight = 64;
+ netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
#endif
netdev->vlan_rx_register = e1000_vlan_rx_register;
netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
/* tell the stack to leave us alone until e1000_open() is called */
netif_carrier_off(netdev);
netif_stop_queue(netdev);
-#ifdef CONFIG_E1000_NAPI
- netif_poll_disable(netdev);
-#endif
strcpy(netdev->name, "eth%d");
if ((err = register_netdev(netdev)))
* would have already happened in close and is redundant. */
e1000_release_hw_control(adapter);
- unregister_netdev(netdev);
#ifdef CONFIG_E1000_NAPI
for (i = 0; i < adapter->num_rx_queues; i++)
dev_put(&adapter->polling_netdev[i]);
#endif
+ unregister_netdev(netdev);
+
if (!e1000_check_phy_reset_block(&adapter->hw))
e1000_phy_hw_reset(&adapter->hw);
#ifdef CONFIG_E1000_NAPI
for (i = 0; i < adapter->num_rx_queues; i++) {
adapter->polling_netdev[i].priv = adapter;
- adapter->polling_netdev[i].poll = &e1000_clean;
- adapter->polling_netdev[i].weight = 64;
dev_hold(&adapter->polling_netdev[i]);
set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
}
clear_bit(__E1000_DOWN, &adapter->flags);
#ifdef CONFIG_E1000_NAPI
- netif_poll_enable(netdev);
+ napi_enable(&adapter->napi);
#endif
e1000_irq_enable(adapter);
}
#ifdef CONFIG_E1000_NAPI
- if (likely(netif_rx_schedule_prep(netdev))) {
+ if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
adapter->total_tx_bytes = 0;
adapter->total_tx_packets = 0;
adapter->total_rx_bytes = 0;
adapter->total_rx_packets = 0;
- __netif_rx_schedule(netdev);
+ __netif_rx_schedule(netdev, &adapter->napi);
} else
e1000_irq_enable(adapter);
#else
E1000_WRITE_REG(hw, IMC, ~0);
E1000_WRITE_FLUSH(hw);
}
- if (likely(netif_rx_schedule_prep(netdev))) {
+ if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
adapter->total_tx_bytes = 0;
adapter->total_tx_packets = 0;
adapter->total_rx_bytes = 0;
adapter->total_rx_packets = 0;
- __netif_rx_schedule(netdev);
+ __netif_rx_schedule(netdev, &adapter->napi);
} else
/* this really should not happen! if it does it is basically a
* bug, but not a hard error, so enable ints and continue */
**/
static int
-e1000_clean(struct net_device *poll_dev, int *budget)
+e1000_clean(struct napi_struct *napi, int budget)
{
- struct e1000_adapter *adapter;
- int work_to_do = min(*budget, poll_dev->quota);
+ struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
+ struct net_device *poll_dev = adapter->netdev;
int tx_cleaned = 0, work_done = 0;
/* Must NOT use netdev_priv macro here. */
}
adapter->clean_rx(adapter, &adapter->rx_ring[0],
- &work_done, work_to_do);
-
- *budget -= work_done;
- poll_dev->quota -= work_done;
+ &work_done, budget);
/* If no Tx and not enough Rx work done, exit the polling mode */
- if ((!tx_cleaned && (work_done == 0)) ||
+ if ((!tx_cleaned && (work_done < budget)) ||
!netif_running(poll_dev)) {
quit_polling:
if (likely(adapter->itr_setting & 3))
e1000_set_itr(adapter);
- netif_rx_complete(poll_dev);
+ netif_rx_complete(poll_dev, napi);
e1000_irq_enable(adapter);
- return 0;
}
- return 1;
+ return work_done;
}
#endif
* Port resources
*/
struct ehea_port_res {
+ struct napi_struct napi;
struct port_stats p_stats;
struct ehea_mr send_mr; /* send memory region */
struct ehea_mr recv_mr; /* receive memory region */
struct ehea_cq *send_cq;
struct ehea_cq *recv_cq;
struct ehea_eq *eq;
- struct net_device *d_netdev;
struct ehea_q_skb_arr rq1_skba;
struct ehea_q_skb_arr rq2_skba;
struct ehea_q_skb_arr rq3_skba;
return 0;
}
-static struct ehea_cqe *ehea_proc_rwqes(struct net_device *dev,
- struct ehea_port_res *pr,
- int *budget)
+static int ehea_proc_rwqes(struct net_device *dev,
+ struct ehea_port_res *pr,
+ int budget)
{
struct ehea_port *port = pr->port;
struct ehea_qp *qp = pr->qp;
int skb_arr_rq2_len = pr->rq2_skba.len;
int skb_arr_rq3_len = pr->rq3_skba.len;
int processed, processed_rq1, processed_rq2, processed_rq3;
- int wqe_index, last_wqe_index, rq, my_quota, port_reset;
+ int wqe_index, last_wqe_index, rq, port_reset;
processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
last_wqe_index = 0;
- my_quota = min(*budget, dev->quota);
cqe = ehea_poll_rq1(qp, &wqe_index);
- while ((my_quota > 0) && cqe) {
+ while ((processed < budget) && cqe) {
ehea_inc_rq1(qp);
processed_rq1++;
processed++;
- my_quota--;
if (netif_msg_rx_status(port))
ehea_dump(cqe, sizeof(*cqe), "CQE");
if (netif_msg_rx_err(port))
ehea_error("LL rq1: skb=NULL");
- skb = netdev_alloc_skb(port->netdev,
+ skb = netdev_alloc_skb(dev,
EHEA_L_PKT_SIZE);
if (!skb)
break;
}
skb_copy_to_linear_data(skb, ((char*)cqe) + 64,
cqe->num_bytes_transfered - 4);
- ehea_fill_skb(port->netdev, skb, cqe);
+ ehea_fill_skb(dev, skb, cqe);
} else if (rq == 2) { /* RQ2 */
skb = get_skb_by_index(skb_arr_rq2,
skb_arr_rq2_len, cqe);
ehea_error("rq2: skb=NULL");
break;
}
- ehea_fill_skb(port->netdev, skb, cqe);
+ ehea_fill_skb(dev, skb, cqe);
processed_rq2++;
} else { /* RQ3 */
skb = get_skb_by_index(skb_arr_rq3,
ehea_error("rq3: skb=NULL");
break;
}
- ehea_fill_skb(port->netdev, skb, cqe);
+ ehea_fill_skb(dev, skb, cqe);
processed_rq3++;
}
else
netif_receive_skb(skb);
- port->netdev->last_rx = jiffies;
+ dev->last_rx = jiffies;
} else {
pr->p_stats.poll_receive_errors++;
port_reset = ehea_treat_poll_error(pr, rq, cqe,
}
pr->rx_packets += processed;
- *budget -= processed;
ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
ehea_refill_rq2(pr, processed_rq2);
ehea_refill_rq3(pr, processed_rq3);
- cqe = ehea_poll_rq1(qp, &wqe_index);
- return cqe;
+ return processed;
}
static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
}
#define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
+#define EHEA_POLL_MAX_CQES 65535
-static int ehea_poll(struct net_device *dev, int *budget)
+static int ehea_poll(struct napi_struct *napi, int budget)
{
- struct ehea_port_res *pr = dev->priv;
+ struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, napi);
+ struct net_device *dev = pr->port->netdev;
struct ehea_cqe *cqe;
struct ehea_cqe *cqe_skb = NULL;
int force_irq, wqe_index;
-
- cqe = ehea_poll_rq1(pr->qp, &wqe_index);
- cqe_skb = ehea_poll_cq(pr->send_cq);
+ int rx = 0;
force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
+ cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
+
+ if (!force_irq)
+ rx += ehea_proc_rwqes(dev, pr, budget - rx);
- if ((!cqe && !cqe_skb) || force_irq) {
+ while ((rx != budget) || force_irq) {
pr->poll_counter = 0;
- netif_rx_complete(dev);
+ force_irq = 0;
+ netif_rx_complete(dev, napi);
ehea_reset_cq_ep(pr->recv_cq);
ehea_reset_cq_ep(pr->send_cq);
ehea_reset_cq_n1(pr->recv_cq);
cqe_skb = ehea_poll_cq(pr->send_cq);
if (!cqe && !cqe_skb)
- return 0;
+ return rx;
- if (!netif_rx_reschedule(dev, dev->quota))
- return 0;
- }
-
- cqe = ehea_proc_rwqes(dev, pr, budget);
- cqe_skb = ehea_proc_cqes(pr, 300);
+ if (!netif_rx_reschedule(dev, napi))
+ return rx;
- if (cqe || cqe_skb)
- pr->poll_counter++;
+ cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
+ rx += ehea_proc_rwqes(dev, pr, budget - rx);
+ }
- return 1;
+ pr->poll_counter++;
+ return rx;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static void ehea_netpoll(struct net_device *dev)
{
struct ehea_port *port = netdev_priv(dev);
+ int i;
- netif_rx_schedule(port->port_res[0].d_netdev);
+ for (i = 0; i < port->num_def_qps; i++)
+ netif_rx_schedule(dev, &port->port_res[i].napi);
}
#endif
-static int ehea_poll_firstqueue(struct net_device *dev, int *budget)
-{
- struct ehea_port *port = netdev_priv(dev);
- struct net_device *d_dev = port->port_res[0].d_netdev;
-
- return ehea_poll(d_dev, budget);
-}
-
static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
{
struct ehea_port_res *pr = param;
- netif_rx_schedule(pr->d_netdev);
+ netif_rx_schedule(pr->port->netdev, &pr->napi);
return IRQ_HANDLED;
}
kfree(init_attr);
- pr->d_netdev = alloc_netdev(0, "", ether_setup);
- if (!pr->d_netdev)
- goto out_free;
- pr->d_netdev->priv = pr;
- pr->d_netdev->weight = 64;
- pr->d_netdev->poll = ehea_poll;
- set_bit(__LINK_STATE_START, &pr->d_netdev->state);
- strcpy(pr->d_netdev->name, port->netdev->name);
+ netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
ret = 0;
goto out;
{
int ret, i;
- free_netdev(pr->d_netdev);
-
ret = ehea_destroy_qp(pr->qp);
if (!ret) {
return ret;
}
+static void port_napi_disable(struct ehea_port *port)
+{
+ int i;
+
+ for (i = 0; i < port->num_def_qps; i++)
+ napi_disable(&port->port_res[i].napi);
+}
+
+static void port_napi_enable(struct ehea_port *port)
+{
+ int i;
+
+ for (i = 0; i < port->num_def_qps; i++)
+ napi_enable(&port->port_res[i].napi);
+}
+
static int ehea_open(struct net_device *dev)
{
int ret;
ehea_info("enabling port %s", dev->name);
ret = ehea_up(dev);
- if (!ret)
+ if (!ret) {
+ port_napi_enable(port);
netif_start_queue(dev);
+ }
up(&port->port_lock);
static int ehea_down(struct net_device *dev)
{
- int ret, i;
+ int ret;
struct ehea_port *port = netdev_priv(dev);
if (port->state == EHEA_PORT_DOWN)
ehea_drop_multicast_list(dev);
ehea_free_interrupts(dev);
- for (i = 0; i < port->num_def_qps; i++)
- while (test_bit(__LINK_STATE_RX_SCHED,
- &port->port_res[i].d_netdev->state))
- msleep(1);
+ port_napi_disable(port);
port->state = EHEA_PORT_DOWN;
port->resets++;
down(&port->port_lock);
netif_stop_queue(dev);
- netif_poll_disable(dev);
+
+ port_napi_disable(port);
ehea_down(dev);
if (netif_msg_timer(port))
ehea_info("Device %s resetted successfully", dev->name);
- netif_poll_enable(dev);
+ port_napi_enable(port);
+
netif_wake_queue(dev);
out:
up(&port->port_lock);
dev->name);
down(&port->port_lock);
netif_stop_queue(dev);
- netif_poll_disable(dev);
+
+ port_napi_disable(port);
+
ehea_down(dev);
up(&port->port_lock);
}
ret = ehea_up(dev);
if (!ret) {
- netif_poll_enable(dev);
+ port_napi_enable(port);
netif_wake_queue(dev);
}
memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
dev->open = ehea_open;
- dev->poll = ehea_poll_firstqueue;
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = ehea_netpoll;
#endif
- dev->weight = 64;
dev->stop = ehea_stop;
dev->hard_start_xmit = ehea_start_xmit;
dev->get_stats = ehea_get_stats;
/* Ring pointers. */
spinlock_t lock; /* Group with Tx control cache line. */
spinlock_t napi_lock;
+ struct napi_struct napi;
unsigned int reschedule_in_poll;
unsigned int cur_tx, dirty_tx;
static void epic_init_ring(struct net_device *dev);
static int epic_start_xmit(struct sk_buff *skb, struct net_device *dev);
static int epic_rx(struct net_device *dev, int budget);
-static int epic_poll(struct net_device *dev, int *budget);
+static int epic_poll(struct napi_struct *napi, int budget);
static irqreturn_t epic_interrupt(int irq, void *dev_instance);
static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static const struct ethtool_ops netdev_ethtool_ops;
dev->ethtool_ops = &netdev_ethtool_ops;
dev->watchdog_timeo = TX_TIMEOUT;
dev->tx_timeout = &epic_tx_timeout;
- dev->poll = epic_poll;
- dev->weight = 64;
+ netif_napi_add(dev, &ep->napi, epic_poll, 64);
ret = register_netdev(dev);
if (ret < 0)
/* Soft reset the chip. */
outl(0x4001, ioaddr + GENCTL);
- if ((retval = request_irq(dev->irq, &epic_interrupt, IRQF_SHARED, dev->name, dev)))
+ napi_enable(&ep->napi);
+ if ((retval = request_irq(dev->irq, &epic_interrupt, IRQF_SHARED, dev->name, dev))) {
+ napi_disable(&ep->napi);
return retval;
+ }
epic_init_ring(dev);
if ((status & EpicNapiEvent) && !ep->reschedule_in_poll) {
spin_lock(&ep->napi_lock);
- if (netif_rx_schedule_prep(dev)) {
+ if (netif_rx_schedule_prep(dev, &ep->napi)) {
epic_napi_irq_off(dev, ep);
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &ep->napi);
} else
ep->reschedule_in_poll++;
spin_unlock(&ep->napi_lock);
outw(RxQueued, ioaddr + COMMAND);
}
-static int epic_poll(struct net_device *dev, int *budget)
+static int epic_poll(struct napi_struct *napi, int budget)
{
- struct epic_private *ep = dev->priv;
- int work_done = 0, orig_budget;
+ struct epic_private *ep = container_of(napi, struct epic_private, napi);
+ struct net_device *dev = ep->mii.dev;
+ int work_done = 0;
long ioaddr = dev->base_addr;
- orig_budget = (*budget > dev->quota) ? dev->quota : *budget;
-
rx_action:
epic_tx(dev, ep);
- work_done += epic_rx(dev, *budget);
+ work_done += epic_rx(dev, budget);
epic_rx_err(dev, ep);
- *budget -= work_done;
- dev->quota -= work_done;
-
- if (netif_running(dev) && (work_done < orig_budget)) {
+ if (netif_running(dev) && (work_done < budget)) {
unsigned long flags;
int more;
more = ep->reschedule_in_poll;
if (!more) {
- __netif_rx_complete(dev);
+ __netif_rx_complete(dev, napi);
outl(EpicNapiEvent, ioaddr + INTSTAT);
epic_napi_irq_on(dev, ep);
} else
goto rx_action;
}
- return (work_done >= orig_budget);
+ return work_done;
}
static int epic_close(struct net_device *dev)
int i;
netif_stop_queue(dev);
+ napi_disable(&ep->napi);
if (debug > 1)
printk(KERN_DEBUG "%s: Shutting down ethercard, status was %2.2x.\n",
struct fec_enet_private {
spinlock_t lock; /* during all ops except TX pckt processing */
spinlock_t tx_lock; /* during fec_start_xmit and fec_tx */
+ struct net_device *dev;
+ struct napi_struct napi;
int fecno;
struct fec *fecp;
const struct fec_platform_info *fpi;
}
/* common receive function */
-static int fec_enet_rx_common(struct net_device *dev, int *budget)
+static int fec_enet_rx_common(struct fec_enet_private *ep,
+ struct net_device *dev, int budget)
{
- struct fec_enet_private *fep = netdev_priv(dev);
fec_t *fecp = fep->fecp;
const struct fec_platform_info *fpi = fep->fpi;
cbd_t *bdp;
int received = 0;
__u16 pkt_len, sc;
int curidx;
- int rx_work_limit;
if (fpi->use_napi) {
- rx_work_limit = min(dev->quota, *budget);
-
if (!netif_running(dev))
return 0;
}
BUG_ON(skbn == NULL);
} else {
-
- /* napi, got packet but no quota */
- if (fpi->use_napi && --rx_work_limit < 0)
- break;
-
skb = fep->rx_skbuff[curidx];
BUG_ON(skb == NULL);
* able to keep up at the expense of system resources.
*/
FW(fecp, r_des_active, 0x01000000);
+
+ if (received >= budget)
+ break;
+
}
fep->cur_rx = bdp;
if (fpi->use_napi) {
- dev->quota -= received;
- *budget -= received;
-
- if (rx_work_limit < 0)
- return 1; /* not done */
+ if (received < budget) {
+ netif_rx_complete(dev, &fep->napi);
- /* done */
- netif_rx_complete(dev);
-
- /* enable RX interrupt bits */
- FS(fecp, imask, FEC_ENET_RXF | FEC_ENET_RXB);
+ /* enable RX interrupt bits */
+ FS(fecp, imask, FEC_ENET_RXF | FEC_ENET_RXB);
+ }
}
- return 0;
+ return received;
}
static void fec_enet_tx(struct net_device *dev)
if ((int_events & FEC_ENET_RXF) != 0) {
if (!fpi->use_napi)
- fec_enet_rx_common(dev, NULL);
+ fec_enet_rx_common(fep, dev, ~0);
else {
- if (netif_rx_schedule_prep(dev)) {
+ if (netif_rx_schedule_prep(dev, &fep->napi)) {
/* disable rx interrupts */
FC(fecp, imask, FEC_ENET_RXF | FEC_ENET_RXB);
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &fep->napi);
} else {
printk(KERN_ERR DRV_MODULE_NAME
": %s driver bug! interrupt while in poll!\n",
const struct fec_platform_info *fpi = fep->fpi;
unsigned long flags;
+ napi_enable(&fep->napi);
+
/* Install our interrupt handler. */
if (request_irq(fpi->fec_irq, fec_enet_interrupt, 0, "fec", dev) != 0) {
printk(KERN_ERR DRV_MODULE_NAME
": %s Could not allocate FEC IRQ!", dev->name);
+ napi_disable(&fep->napi);
return -EINVAL;
}
printk(KERN_ERR DRV_MODULE_NAME
": %s Could not allocate PHY IRQ!", dev->name);
free_irq(fpi->fec_irq, dev);
+ napi_disable(&fep->napi);
return -EINVAL;
}
unsigned long flags;
netif_stop_queue(dev);
+ napi_disable(&fep->napi);
netif_carrier_off(dev);
if (fpi->use_mdio)
return &fep->stats;
}
-static int fec_enet_poll(struct net_device *dev, int *budget)
+static int fec_enet_poll(struct napi_struct *napi, int budget)
{
- return fec_enet_rx_common(dev, budget);
+ struct fec_enet_private *fep = container_of(napi, struct fec_enet_private, napi);
+ struct net_device *dev = fep->dev;
+
+ return fec_enet_rx_common(fep, dev, budget);
}
/*************************************************************************/
SET_MODULE_OWNER(dev);
fep = netdev_priv(dev);
+ fep->dev = dev;
/* partial reset of FEC */
fec_whack_reset(fecp);
dev->get_stats = fec_enet_get_stats;
dev->set_multicast_list = fec_set_multicast_list;
dev->set_mac_address = fec_set_mac_address;
- if (fpi->use_napi) {
- dev->poll = fec_enet_poll;
- dev->weight = fpi->napi_weight;
- }
+ netif_napi_add(dev, &fec->napi,
+ fec_enet_poll, fpi->napi_weight);
+
dev->ethtool_ops = &fec_ethtool_ops;
dev->do_ioctl = fec_ioctl;
#define dprintk(x...) do { } while (0)
#endif
+#define TX_WORK_PER_LOOP 64
+#define RX_WORK_PER_LOOP 64
/*
* Hardware access:
struct fe_priv {
spinlock_t lock;
+ struct net_device *dev;
+ struct napi_struct napi;
+
/* General data:
* Locking: spin_lock(&np->lock); */
struct net_device_stats stats;
static void nv_do_rx_refill(unsigned long data)
{
struct net_device *dev = (struct net_device *) data;
+ struct fe_priv *np = netdev_priv(dev);
/* Just reschedule NAPI rx processing */
- netif_rx_schedule(dev);
+ netif_rx_schedule(dev, &np->napi);
}
#else
static void nv_do_rx_refill(unsigned long data)
#ifdef CONFIG_FORCEDETH_NAPI
if (events & NVREG_IRQ_RX_ALL) {
- netif_rx_schedule(dev);
+ netif_rx_schedule(dev, &np->napi);
/* Disable furthur receive irq's */
spin_lock(&np->lock);
spin_unlock(&np->lock);
}
#else
- if (nv_rx_process(dev, dev->weight)) {
+ if (nv_rx_process(dev, RX_WORK_PER_LOOP)) {
if (unlikely(nv_alloc_rx(dev))) {
spin_lock(&np->lock);
if (!np->in_shutdown)
return IRQ_RETVAL(i);
}
-#define TX_WORK_PER_LOOP 64
-#define RX_WORK_PER_LOOP 64
/**
* All _optimized functions are used to help increase performance
* (reduce CPU and increase throughput). They use descripter version 3,
#ifdef CONFIG_FORCEDETH_NAPI
if (events & NVREG_IRQ_RX_ALL) {
- netif_rx_schedule(dev);
+ netif_rx_schedule(dev, &np->napi);
/* Disable furthur receive irq's */
spin_lock(&np->lock);
spin_unlock(&np->lock);
}
#else
- if (nv_rx_process_optimized(dev, dev->weight)) {
+ if (nv_rx_process_optimized(dev, RX_WORK_PER_LOOP)) {
if (unlikely(nv_alloc_rx_optimized(dev))) {
spin_lock(&np->lock);
if (!np->in_shutdown)
}
#ifdef CONFIG_FORCEDETH_NAPI
-static int nv_napi_poll(struct net_device *dev, int *budget)
+static int nv_napi_poll(struct napi_struct *napi, int budget)
{
- int pkts, limit = min(*budget, dev->quota);
- struct fe_priv *np = netdev_priv(dev);
+ struct fe_priv *np = container_of(napi, struct fe_priv, napi);
+ struct net_device *dev = np->dev;
u8 __iomem *base = get_hwbase(dev);
unsigned long flags;
- int retcode;
+ int pkts, retcode;
if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
- pkts = nv_rx_process(dev, limit);
+ pkts = nv_rx_process(dev, budget);
retcode = nv_alloc_rx(dev);
} else {
- pkts = nv_rx_process_optimized(dev, limit);
+ pkts = nv_rx_process_optimized(dev, budget);
retcode = nv_alloc_rx_optimized(dev);
}
spin_unlock_irqrestore(&np->lock, flags);
}
- if (pkts < limit) {
- /* all done, no more packets present */
- netif_rx_complete(dev);
-
+ if (pkts < budget) {
/* re-enable receive interrupts */
spin_lock_irqsave(&np->lock, flags);
+ __netif_rx_complete(dev, napi);
+
np->irqmask |= NVREG_IRQ_RX_ALL;
if (np->msi_flags & NV_MSI_X_ENABLED)
writel(NVREG_IRQ_RX_ALL, base + NvRegIrqMask);
writel(np->irqmask, base + NvRegIrqMask);
spin_unlock_irqrestore(&np->lock, flags);
- return 0;
- } else {
- /* used up our quantum, so reschedule */
- dev->quota -= pkts;
- *budget -= pkts;
- return 1;
}
+ return pkts;
}
#endif
static irqreturn_t nv_nic_irq_rx(int foo, void *data)
{
struct net_device *dev = (struct net_device *) data;
+ struct fe_priv *np = netdev_priv(dev);
u8 __iomem *base = get_hwbase(dev);
u32 events;
writel(NVREG_IRQ_RX_ALL, base + NvRegMSIXIrqStatus);
if (events) {
- netif_rx_schedule(dev);
+ netif_rx_schedule(dev, &np->napi);
/* disable receive interrupts on the nic */
writel(NVREG_IRQ_RX_ALL, base + NvRegIrqMask);
pci_push(base);
if (!(events & np->irqmask))
break;
- if (nv_rx_process_optimized(dev, dev->weight)) {
+ if (nv_rx_process_optimized(dev, RX_WORK_PER_LOOP)) {
if (unlikely(nv_alloc_rx_optimized(dev))) {
spin_lock_irqsave(&np->lock, flags);
if (!np->in_shutdown)
if (test->flags & ETH_TEST_FL_OFFLINE) {
if (netif_running(dev)) {
netif_stop_queue(dev);
- netif_poll_disable(dev);
+#ifdef CONFIG_FORCEDETH_NAPI
+ napi_disable(&np->napi);
+#endif
netif_tx_lock_bh(dev);
spin_lock_irq(&np->lock);
nv_disable_hw_interrupts(dev, np->irqmask);
nv_start_rx(dev);
nv_start_tx(dev);
netif_start_queue(dev);
- netif_poll_enable(dev);
+#ifdef CONFIG_FORCEDETH_NAPI
+ napi_enable(&np->napi);
+#endif
nv_enable_hw_interrupts(dev, np->irqmask);
}
}
nv_start_rx(dev);
nv_start_tx(dev);
netif_start_queue(dev);
- netif_poll_enable(dev);
+#ifdef CONFIG_FORCEDETH_NAPI
+ napi_enable(&np->napi);
+#endif
if (ret) {
netif_carrier_on(dev);
spin_lock_irq(&np->lock);
np->in_shutdown = 1;
spin_unlock_irq(&np->lock);
- netif_poll_disable(dev);
+#ifdef CONFIG_FORCEDETH_NAPI
+ napi_disable(&np->napi);
+#endif
synchronize_irq(dev->irq);
del_timer_sync(&np->oom_kick);
goto out;
np = netdev_priv(dev);
+ np->dev = dev;
np->pci_dev = pci_dev;
spin_lock_init(&np->lock);
SET_MODULE_OWNER(dev);
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = nv_poll_controller;
#endif
- dev->weight = RX_WORK_PER_LOOP;
#ifdef CONFIG_FORCEDETH_NAPI
- dev->poll = nv_napi_poll;
+ netif_napi_add(dev, &np->napi, nv_napi_poll, RX_WORK_PER_LOOP);
#endif
SET_ETHTOOL_OPS(dev, &ops);
dev->tx_timeout = nv_tx_timeout;
}
/* NAPI receive function */
-static int fs_enet_rx_napi(struct net_device *dev, int *budget)
+static int fs_enet_rx_napi(struct napi_struct *napi, int budget)
{
- struct fs_enet_private *fep = netdev_priv(dev);
+ struct fs_enet_private *fep = container_of(napi, struct fs_enet_private, napi);
+ struct net_device *dev = to_net_dev(fep->dev);
const struct fs_platform_info *fpi = fep->fpi;
cbd_t *bdp;
struct sk_buff *skb, *skbn, *skbt;
int received = 0;
u16 pkt_len, sc;
int curidx;
- int rx_work_limit = 0; /* pacify gcc */
-
- rx_work_limit = min(dev->quota, *budget);
if (!netif_running(dev))
return 0;
(*fep->ops->napi_clear_rx_event)(dev);
while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0) {
-
curidx = bdp - fep->rx_bd_base;
/*
skbn = skb;
} else {
-
- /* napi, got packet but no quota */
- if (--rx_work_limit < 0)
- break;
-
skb = fep->rx_skbuff[curidx];
dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
bdp = fep->rx_bd_base;
(*fep->ops->rx_bd_done)(dev);
+
+ if (received >= budget)
+ break;
}
fep->cur_rx = bdp;
- dev->quota -= received;
- *budget -= received;
-
- if (rx_work_limit < 0)
- return 1; /* not done */
-
- /* done */
- netif_rx_complete(dev);
-
- (*fep->ops->napi_enable_rx)(dev);
-
- return 0;
+ if (received >= budget) {
+ /* done */
+ netif_rx_complete(dev, napi);
+ (*fep->ops->napi_enable_rx)(dev);
+ }
+ return received;
}
/* non NAPI receive function */
if (!fpi->use_napi)
fs_enet_rx_non_napi(dev);
else {
- napi_ok = netif_rx_schedule_prep(dev);
+ napi_ok = napi_schedule_prep(&fep->napi);
(*fep->ops->napi_disable_rx)(dev);
(*fep->ops->clear_int_events)(dev, fep->ev_napi_rx);
/* NOTE: it is possible for FCCs in NAPI mode */
/* to submit a spurious interrupt while in poll */
if (napi_ok)
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &fep->napi);
}
}
int r;
int err;
+ napi_enable(&fep->napi);
+
/* Install our interrupt handler. */
r = fs_request_irq(dev, fep->interrupt, "fs_enet-mac", fs_enet_interrupt);
if (r != 0) {
printk(KERN_ERR DRV_MODULE_NAME
": %s Could not allocate FS_ENET IRQ!", dev->name);
+ napi_disable(&fep->napi);
return -EINVAL;
}
err = fs_init_phy(dev);
- if(err)
+ if(err) {
+ napi_disable(&fep->napi);
return err;
-
+ }
phy_start(fep->phydev);
return 0;
netif_stop_queue(dev);
netif_carrier_off(dev);
+ napi_disable(&fep->napi);
phy_stop(fep->phydev);
spin_lock_irqsave(&fep->lock, flags);
ndev->stop = fs_enet_close;
ndev->get_stats = fs_enet_get_stats;
ndev->set_multicast_list = fs_set_multicast_list;
- if (fpi->use_napi) {
- ndev->poll = fs_enet_rx_napi;
- ndev->weight = fpi->napi_weight;
- }
+ netif_napi_add(ndev, &fep->napi,
+ fs_enet_rx_napi, fpi->napi_weight);
+
ndev->ethtool_ops = &fs_ethtool_ops;
ndev->do_ioctl = fs_ioctl;
};
struct fs_enet_private {
+ struct napi_struct napi;
struct device *dev; /* pointer back to the device (must be initialized first) */
spinlock_t lock; /* during all ops except TX pckt processing */
spinlock_t tx_lock; /* during fs_start_xmit and fs_tx */
extern int gfar_local_mdio_write(struct gfar_mii *regs, int mii_id, int regnum, u16 value);
extern int gfar_local_mdio_read(struct gfar_mii *regs, int mii_id, int regnum);
#ifdef CONFIG_GFAR_NAPI
-static int gfar_poll(struct net_device *dev, int *budget);
+static int gfar_poll(struct napi_struct *napi, int budget);
#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
static void gfar_netpoll(struct net_device *dev);
return -ENOMEM;
priv = netdev_priv(dev);
+ priv->dev = dev;
/* Set the info in the priv to the current info */
priv->einfo = einfo;
dev->hard_start_xmit = gfar_start_xmit;
dev->tx_timeout = gfar_timeout;
dev->watchdog_timeo = TX_TIMEOUT;
-#ifdef CONFIG_GFAR_NAPI
- dev->poll = gfar_poll;
- dev->weight = GFAR_DEV_WEIGHT;
-#endif
+ netif_napi_add(dev, &priv->napi, gfar_poll, GFAR_DEV_WEIGHT);
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = gfar_netpoll;
#endif
{
int err;
+ napi_enable(&priv->napi);
+
/* Initialize a bunch of registers */
init_registers(dev);
err = init_phy(dev);
- if(err)
+ if(err) {
+ napi_disable(&priv->napi);
return err;
+ }
err = startup_gfar(dev);
+ if (err)
+ napi_disable(&priv->napi);
netif_start_queue(dev);
static int gfar_close(struct net_device *dev)
{
struct gfar_private *priv = netdev_priv(dev);
+
+ napi_disable(&priv->napi);
+
stop_gfar(dev);
/* Disconnect from the PHY */
return NULL;
alignamount = RXBUF_ALIGNMENT -
- (((unsigned) skb->data) & (RXBUF_ALIGNMENT - 1));
+ (((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1));
/* We need the data buffer to be aligned properly. We will reserve
* as many bytes as needed to align the data properly
/* support NAPI */
#ifdef CONFIG_GFAR_NAPI
- if (netif_rx_schedule_prep(dev)) {
+ if (netif_rx_schedule_prep(dev, &priv->napi)) {
tempval = gfar_read(&priv->regs->imask);
tempval &= IMASK_RX_DISABLED;
gfar_write(&priv->regs->imask, tempval);
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &priv->napi);
} else {
if (netif_msg_rx_err(priv))
printk(KERN_DEBUG "%s: receive called twice (%x)[%x]\n",
}
#ifdef CONFIG_GFAR_NAPI
-static int gfar_poll(struct net_device *dev, int *budget)
+static int gfar_poll(struct napi_struct *napi, int budget)
{
+ struct gfar_private *priv = container_of(napi, struct gfar_private, napi);
+ struct net_device *dev = priv->dev;
int howmany;
- struct gfar_private *priv = netdev_priv(dev);
- int rx_work_limit = *budget;
-
- if (rx_work_limit > dev->quota)
- rx_work_limit = dev->quota;
- howmany = gfar_clean_rx_ring(dev, rx_work_limit);
+ howmany = gfar_clean_rx_ring(dev, budget);
- dev->quota -= howmany;
- rx_work_limit -= howmany;
- *budget -= howmany;
-
- if (rx_work_limit > 0) {
- netif_rx_complete(dev);
+ if (howmany < budget) {
+ netif_rx_complete(dev, napi);
/* Clear the halt bit in RSTAT */
gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT);
gfar_write(&priv->regs->rxic, 0);
}
- /* Return 1 if there's more work to do */
- return (rx_work_limit > 0) ? 0 : 1;
+ return howmany;
}
#endif
/* RX Locked fields */
spinlock_t rxlock;
+ struct net_device *dev;
+ struct napi_struct napi;
+
/* skb array and index */
struct sk_buff ** rx_skbuff;
u16 skb_currx;
static int ibmveth_open(struct net_device *dev);
static int ibmveth_close(struct net_device *dev);
static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
-static int ibmveth_poll(struct net_device *dev, int *budget);
+static int ibmveth_poll(struct napi_struct *napi, int budget);
static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
static struct net_device_stats *ibmveth_get_stats(struct net_device *dev);
static void ibmveth_set_multicast_list(struct net_device *dev);
ibmveth_debug_printk("open starting\n");
+ napi_enable(&adapter->napi);
+
for(i = 0; i<IbmVethNumBufferPools; i++)
rxq_entries += adapter->rx_buff_pool[i].size;
if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
ibmveth_cleanup(adapter);
+ napi_disable(&adapter->napi);
return -ENOMEM;
}
if(!adapter->rx_queue.queue_addr) {
ibmveth_error_printk("unable to allocate rx queue pages\n");
ibmveth_cleanup(adapter);
+ napi_disable(&adapter->napi);
return -ENOMEM;
}
(dma_mapping_error(adapter->rx_queue.queue_dma))) {
ibmveth_error_printk("unable to map filter or buffer list pages\n");
ibmveth_cleanup(adapter);
+ napi_disable(&adapter->napi);
return -ENOMEM;
}
rxq_desc.desc,
mac_address);
ibmveth_cleanup(adapter);
+ napi_disable(&adapter->napi);
return -ENONET;
}
ibmveth_error_printk("unable to alloc pool\n");
adapter->rx_buff_pool[i].active = 0;
ibmveth_cleanup(adapter);
+ napi_disable(&adapter->napi);
return -ENOMEM ;
}
}
} while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
ibmveth_cleanup(adapter);
+ napi_disable(&adapter->napi);
return rc;
}
ibmveth_debug_printk("close starting\n");
+ napi_disable(&adapter->napi);
+
if (!adapter->pool_config)
netif_stop_queue(netdev);
return 0;
}
-static int ibmveth_poll(struct net_device *netdev, int *budget)
+static int ibmveth_poll(struct napi_struct *napi, int budget)
{
- struct ibmveth_adapter *adapter = netdev->priv;
- int max_frames_to_process = netdev->quota;
+ struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi);
+ struct net_device *netdev = adapter->netdev;
int frames_processed = 0;
- int more_work = 1;
unsigned long lpar_rc;
restart_poll:
do {
- struct net_device *netdev = adapter->netdev;
-
- if(ibmveth_rxq_pending_buffer(adapter)) {
- struct sk_buff *skb;
+ struct sk_buff *skb;
- rmb();
+ if (!ibmveth_rxq_pending_buffer(adapter))
+ break;
- if(!ibmveth_rxq_buffer_valid(adapter)) {
- wmb(); /* suggested by larson1 */
- adapter->rx_invalid_buffer++;
- ibmveth_debug_printk("recycling invalid buffer\n");
- ibmveth_rxq_recycle_buffer(adapter);
- } else {
- int length = ibmveth_rxq_frame_length(adapter);
- int offset = ibmveth_rxq_frame_offset(adapter);
- skb = ibmveth_rxq_get_buffer(adapter);
+ rmb();
+ if (!ibmveth_rxq_buffer_valid(adapter)) {
+ wmb(); /* suggested by larson1 */
+ adapter->rx_invalid_buffer++;
+ ibmveth_debug_printk("recycling invalid buffer\n");
+ ibmveth_rxq_recycle_buffer(adapter);
+ } else {
+ int length = ibmveth_rxq_frame_length(adapter);
+ int offset = ibmveth_rxq_frame_offset(adapter);
+ skb = ibmveth_rxq_get_buffer(adapter);
- ibmveth_rxq_harvest_buffer(adapter);
+ ibmveth_rxq_harvest_buffer(adapter);
- skb_reserve(skb, offset);
- skb_put(skb, length);
- skb->protocol = eth_type_trans(skb, netdev);
+ skb_reserve(skb, offset);
+ skb_put(skb, length);
+ skb->protocol = eth_type_trans(skb, netdev);
- netif_receive_skb(skb); /* send it up */
+ netif_receive_skb(skb); /* send it up */
- adapter->stats.rx_packets++;
- adapter->stats.rx_bytes += length;
- frames_processed++;
- netdev->last_rx = jiffies;
- }
- } else {
- more_work = 0;
+ adapter->stats.rx_packets++;
+ adapter->stats.rx_bytes += length;
+ frames_processed++;
+ netdev->last_rx = jiffies;
}
- } while(more_work && (frames_processed < max_frames_to_process));
+ } while (frames_processed < budget);
ibmveth_replenish_task(adapter);
- if(more_work) {
- /* more work to do - return that we are not done yet */
- netdev->quota -= frames_processed;
- *budget -= frames_processed;
- return 1;
- }
-
- /* we think we are done - reenable interrupts, then check once more to make sure we are done */
- lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
+ if (frames_processed < budget) {
+ /* We think we are done - reenable interrupts,
+ * then check once more to make sure we are done.
+ */
+ lpar_rc = h_vio_signal(adapter->vdev->unit_address,
+ VIO_IRQ_ENABLE);
- ibmveth_assert(lpar_rc == H_SUCCESS);
+ ibmveth_assert(lpar_rc == H_SUCCESS);
- netif_rx_complete(netdev);
+ netif_rx_complete(netdev, napi);
- if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
- {
- lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
- ibmveth_assert(lpar_rc == H_SUCCESS);
- more_work = 1;
- goto restart_poll;
+ if (ibmveth_rxq_pending_buffer(adapter) &&
+ netif_rx_reschedule(netdev, napi)) {
+ lpar_rc = h_vio_signal(adapter->vdev->unit_address,
+ VIO_IRQ_DISABLE);
+ goto restart_poll;
+ }
}
- netdev->quota -= frames_processed;
- *budget -= frames_processed;
-
- /* we really are done */
- return 0;
+ return frames_processed;
}
static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
struct ibmveth_adapter *adapter = netdev->priv;
unsigned long lpar_rc;
- if(netif_rx_schedule_prep(netdev)) {
- lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
+ if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
+ lpar_rc = h_vio_signal(adapter->vdev->unit_address,
+ VIO_IRQ_DISABLE);
ibmveth_assert(lpar_rc == H_SUCCESS);
- __netif_rx_schedule(netdev);
+ __netif_rx_schedule(netdev, &adapter->napi);
}
return IRQ_HANDLED;
}
adapter->mcastFilterSize= *mcastFilterSize_p;
adapter->pool_config = 0;
+ netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
+
/* Some older boxes running PHYP non-natively have an OF that
returns a 8-byte local-mac-address field (and the first
2 bytes have to be ignored) while newer boxes' OF return
netdev->irq = dev->irq;
netdev->open = ibmveth_open;
- netdev->poll = ibmveth_poll;
- netdev->weight = 16;
netdev->stop = ibmveth_close;
netdev->hard_start_xmit = ibmveth_start_xmit;
netdev->get_stats = ibmveth_get_stats;
struct ibmveth_adapter {
struct vio_dev *vdev;
struct net_device *netdev;
+ struct napi_struct napi;
struct net_device_stats stats;
unsigned int mcastFilterSize;
unsigned long mac_addr;
boolean_t rx_csum;
/* OS defined structs */
+ struct napi_struct napi;
struct net_device *netdev;
struct pci_dev *pdev;
struct net_device_stats net_stats;
static boolean_t ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
#ifdef CONFIG_IXGB_NAPI
-static int ixgb_clean(struct net_device *netdev, int *budget);
+static int ixgb_clean(struct napi_struct *napi, int budget);
static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter,
int *work_done, int work_to_do);
#else
mod_timer(&adapter->watchdog_timer, jiffies);
#ifdef CONFIG_IXGB_NAPI
- netif_poll_enable(netdev);
+ napi_enable(&adapter->napi);
#endif
ixgb_irq_enable(adapter);
if(kill_watchdog)
del_timer_sync(&adapter->watchdog_timer);
#ifdef CONFIG_IXGB_NAPI
- netif_poll_disable(netdev);
+ napi_disable(&adapter->napi);
#endif
adapter->link_speed = 0;
adapter->link_duplex = 0;
netdev->tx_timeout = &ixgb_tx_timeout;
netdev->watchdog_timeo = 5 * HZ;
#ifdef CONFIG_IXGB_NAPI
- netdev->poll = &ixgb_clean;
- netdev->weight = 64;
+ netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
#endif
netdev->vlan_rx_register = ixgb_vlan_rx_register;
netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
}
#ifdef CONFIG_IXGB_NAPI
- if(netif_rx_schedule_prep(netdev)) {
+ if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
/* Disable interrupts and register for poll. The flush
of the posted write is intentionally left out.
atomic_inc(&adapter->irq_sem);
IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
- __netif_rx_schedule(netdev);
+ __netif_rx_schedule(netdev, &adapter->napi);
}
#else
/* yes, that is actually a & and it is meant to make sure that
**/
static int
-ixgb_clean(struct net_device *netdev, int *budget)
+ixgb_clean(struct napi_struct *napi, int budget)
{
- struct ixgb_adapter *adapter = netdev_priv(netdev);
- int work_to_do = min(*budget, netdev->quota);
+ struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
+ struct net_device *netdev = adapter->netdev;
int tx_cleaned;
int work_done = 0;
tx_cleaned = ixgb_clean_tx_irq(adapter);
- ixgb_clean_rx_irq(adapter, &work_done, work_to_do);
-
- *budget -= work_done;
- netdev->quota -= work_done;
+ ixgb_clean_rx_irq(adapter, &work_done, budget);
/* if no Tx and not enough Rx work done, exit the polling mode */
if((!tx_cleaned && (work_done == 0)) || !netif_running(netdev)) {
- netif_rx_complete(netdev);
+ netif_rx_complete(netdev, napi);
ixgb_irq_enable(adapter);
- return 0;
}
- return 1;
+ return work_done;
}
#endif
}
-static int ixpdev_rx(struct net_device *dev, int *budget)
+static int ixpdev_rx(struct net_device *dev, int processed, int budget)
{
- while (*budget > 0) {
+ while (processed < budget) {
struct ixpdev_rx_desc *desc;
struct sk_buff *skb;
void *buf;
err:
ixp2000_reg_write(RING_RX_PENDING, _desc);
- dev->quota--;
- (*budget)--;
+ processed++;
}
- return 1;
+ return processed;
}
/* dev always points to nds[0]. */
-static int ixpdev_poll(struct net_device *dev, int *budget)
+static int ixpdev_poll(struct napi_struct *napi, int budget)
{
+ struct ixpdev_priv *ip = container_of(napi, struct ixpdev_priv, napi);
+ struct net_device *dev = ip->dev;
+ int rx;
+
/* @@@ Have to stop polling when nds[0] is administratively
* downed while we are polling. */
+ rx = 0;
do {
ixp2000_reg_write(IXP2000_IRQ_THD_RAW_STATUS_A_0, 0x00ff);
- if (ixpdev_rx(dev, budget))
- return 1;
+ rx = ixpdev_rx(dev, rx, budget);
+ if (rx >= budget)
+ break;
} while (ixp2000_reg_read(IXP2000_IRQ_THD_RAW_STATUS_A_0) & 0x00ff);
- netif_rx_complete(dev);
+ netif_rx_complete(dev, napi);
ixp2000_reg_write(IXP2000_IRQ_THD_ENABLE_SET_A_0, 0x00ff);
- return 0;
+ return rx;
}
static void ixpdev_tx_complete(void)
* Any of the eight receive units signaled RX?
*/
if (status & 0x00ff) {
+ struct net_device *dev = nds[0];
+ struct ixpdev_priv *ip = netdev_priv(dev);
+
ixp2000_reg_wrb(IXP2000_IRQ_THD_ENABLE_CLEAR_A_0, 0x00ff);
- if (likely(__netif_rx_schedule_prep(nds[0]))) {
- __netif_rx_schedule(nds[0]);
+ if (likely(napi_schedule_prep(&ip->napi))) {
+ __netif_rx_schedule(dev, &ip->napi);
} else {
printk(KERN_CRIT "ixp2000: irq while polling!!\n");
}
struct ixpdev_priv *ip = netdev_priv(dev);
int err;
+ napi_enable(&ip->napi);
if (!nds_open++) {
err = request_irq(IRQ_IXP2000_THDA0, ixpdev_interrupt,
IRQF_SHARED, "ixp2000_eth", nds);
if (err) {
nds_open--;
+ napi_disable(&ip->napi);
return err;
}
struct ixpdev_priv *ip = netdev_priv(dev);
netif_stop_queue(dev);
+ napi_disable(&ip->napi);
set_port_admin_status(ip->channel, 0);
if (!--nds_open) {
return NULL;
dev->hard_start_xmit = ixpdev_xmit;
- dev->poll = ixpdev_poll;
dev->open = ixpdev_open;
dev->stop = ixpdev_close;
#ifdef CONFIG_NET_POLL_CONTROLLER
#endif
dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
- dev->weight = 64;
ip = netdev_priv(dev);
+ ip->dev = dev;
+ netif_napi_add(dev, &ip->napi, ixpdev_poll, 64);
ip->channel = channel;
ip->tx_queue_entries = 0;
struct ixpdev_priv
{
+ struct net_device *dev;
+ struct napi_struct napi;
int channel;
int tx_queue_entries;
};
return received;
}
-static int macb_poll(struct net_device *dev, int *budget)
+static int macb_poll(struct napi_struct *napi, int budget)
{
- struct macb *bp = netdev_priv(dev);
- int orig_budget, work_done, retval = 0;
+ struct macb *bp = container_of(napi, struct macb, napi);
+ struct net_device *dev = bp->dev;
+ int work_done;
u32 status;
status = macb_readl(bp, RSR);
macb_writel(bp, RSR, status);
+ work_done = 0;
if (!status) {
/*
* This may happen if an interrupt was pending before
* this function was called last time, and no packets
* have been received since.
*/
- netif_rx_complete(dev);
+ netif_rx_complete(dev, napi);
goto out;
}
dev_dbg(&bp->pdev->dev, "poll: status = %08lx, budget = %d\n",
- (unsigned long)status, *budget);
+ (unsigned long)status, budget);
if (!(status & MACB_BIT(REC))) {
dev_warn(&bp->pdev->dev,
"No RX buffers complete, status = %02lx\n",
(unsigned long)status);
- netif_rx_complete(dev);
+ netif_rx_complete(dev, napi);
goto out;
}
- orig_budget = *budget;
- if (orig_budget > dev->quota)
- orig_budget = dev->quota;
-
- work_done = macb_rx(bp, orig_budget);
- if (work_done < orig_budget) {
- netif_rx_complete(dev);
- retval = 0;
- } else {
- retval = 1;
- }
+ work_done = macb_rx(bp, budget);
+ if (work_done < budget)
+ netif_rx_complete(dev, napi);
/*
* We've done what we can to clean the buffers. Make sure we
/* TODO: Handle errors */
- return retval;
+ return work_done;
}
static irqreturn_t macb_interrupt(int irq, void *dev_id)
}
if (status & MACB_RX_INT_FLAGS) {
- if (netif_rx_schedule_prep(dev)) {
+ if (netif_rx_schedule_prep(dev, &bp->napi)) {
/*
* There's no point taking any more interrupts
* until we have processed the buffers
macb_writel(bp, IDR, MACB_RX_INT_FLAGS);
dev_dbg(&bp->pdev->dev,
"scheduling RX softirq\n");
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &bp->napi);
}
}
return err;
}
+ napi_enable(&bp->napi);
+
macb_init_rings(bp);
macb_init_hw(bp);
unsigned long flags;
netif_stop_queue(dev);
+ napi_disable(&bp->napi);
if (bp->phy_dev)
phy_stop(bp->phy_dev);
dev->get_stats = macb_get_stats;
dev->set_multicast_list = macb_set_rx_mode;
dev->do_ioctl = macb_ioctl;
- dev->poll = macb_poll;
- dev->weight = 64;
+ netif_napi_add(dev, &bp->napi, macb_poll, 64);
dev->ethtool_ops = &macb_ethtool_ops;
dev->base_addr = regs->start;
struct clk *pclk;
struct clk *hclk;
struct net_device *dev;
+ struct napi_struct napi;
struct net_device_stats stats;
struct macb_stats hw_stats;
static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *);
static void eth_port_init_mac_tables(unsigned int eth_port_num);
#ifdef MV643XX_NAPI
-static int mv643xx_poll(struct net_device *dev, int *budget);
+static int mv643xx_poll(struct napi_struct *napi, int budget);
#endif
static int ethernet_phy_get(unsigned int eth_port_num);
static void ethernet_phy_set(unsigned int eth_port_num, int phy_addr);
/* wait for previous write to complete */
mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num));
- netif_rx_schedule(dev);
+ netif_rx_schedule(dev, &mp->napi);
}
#else
if (eth_int_cause & ETH_INT_CAUSE_RX)
mv643xx_eth_rx_refill_descs(dev); /* Fill RX ring with skb's */
+#ifdef MV643XX_NAPI
+ napi_enable(&mp->napi);
+#endif
+
eth_port_start(dev);
/* Interrupt Coalescing */
mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num));
#ifdef MV643XX_NAPI
- netif_poll_disable(dev);
+ napi_disable(&mp->napi);
#endif
netif_carrier_off(dev);
netif_stop_queue(dev);
mv643xx_eth_free_tx_rings(dev);
mv643xx_eth_free_rx_rings(dev);
-#ifdef MV643XX_NAPI
- netif_poll_enable(dev);
-#endif
-
free_irq(dev->irq, dev);
return 0;
*
* This function is used in case of NAPI
*/
-static int mv643xx_poll(struct net_device *dev, int *budget)
+static int mv643xx_poll(struct napi_struct *napi, int budget)
{
- struct mv643xx_private *mp = netdev_priv(dev);
- int done = 1, orig_budget, work_done;
+ struct mv643xx_private *mp = container_of(napi, struct mv643xx_private, napi);
+ struct net_device *dev = mp->dev;
unsigned int port_num = mp->port_num;
+ int work_done;
#ifdef MV643XX_TX_FAST_REFILL
if (++mp->tx_clean_threshold > 5) {
}
#endif
+ work_done = 0;
if ((mv_read(MV643XX_ETH_RX_CURRENT_QUEUE_DESC_PTR_0(port_num)))
- != (u32) mp->rx_used_desc_q) {
- orig_budget = *budget;
- if (orig_budget > dev->quota)
- orig_budget = dev->quota;
- work_done = mv643xx_eth_receive_queue(dev, orig_budget);
- *budget -= work_done;
- dev->quota -= work_done;
- if (work_done >= orig_budget)
- done = 0;
- }
+ != (u32) mp->rx_used_desc_q)
+ work_done = mv643xx_eth_receive_queue(dev, budget);
- if (done) {
- netif_rx_complete(dev);
+ if (work_done < budget) {
+ netif_rx_complete(dev, napi);
mv_write(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num), 0);
mv_write(MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num), 0);
mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num),
ETH_INT_UNMASK_ALL);
}
- return done ? 0 : 1;
+ return work_done;
}
#endif
platform_set_drvdata(pdev, dev);
mp = netdev_priv(dev);
+ mp->dev = dev;
+#ifdef MV643XX_NAPI
+ netif_napi_add(dev, &mp->napi, mv643xx_poll, 64);
+#endif
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
BUG_ON(!res);
/* No need to Tx Timeout */
dev->tx_timeout = mv643xx_eth_tx_timeout;
-#ifdef MV643XX_NAPI
- dev->poll = mv643xx_poll;
- dev->weight = 64;
-#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = mv643xx_netpoll;
struct work_struct tx_timeout_task;
+ struct net_device *dev;
+ struct napi_struct napi;
struct net_device_stats stats;
struct mv643xx_mib_counters mib_counters;
spinlock_t lock;
int small_bytes;
int big_bytes;
struct net_device *dev;
+ struct napi_struct napi;
struct net_device_stats stats;
u8 __iomem *sram;
int sram_size;
}
}
-static inline void myri10ge_clean_rx_done(struct myri10ge_priv *mgp, int *limit)
+static inline int myri10ge_clean_rx_done(struct myri10ge_priv *mgp, int budget)
{
struct myri10ge_rx_done *rx_done = &mgp->rx_done;
unsigned long rx_bytes = 0;
int idx = rx_done->idx;
int cnt = rx_done->cnt;
+ int work_done = 0;
u16 length;
__wsum checksum;
- while (rx_done->entry[idx].length != 0 && *limit != 0) {
+ while (rx_done->entry[idx].length != 0 && work_done++ < budget) {
length = ntohs(rx_done->entry[idx].length);
rx_done->entry[idx].length = 0;
checksum = csum_unfold(rx_done->entry[idx].checksum);
rx_bytes += rx_ok * (unsigned long)length;
cnt++;
idx = cnt & (myri10ge_max_intr_slots - 1);
-
- /* limit potential for livelock by only handling a
- * limited number of frames. */
- (*limit)--;
}
rx_done->idx = idx;
rx_done->cnt = cnt;
if (mgp->rx_big.fill_cnt - mgp->rx_big.cnt < myri10ge_fill_thresh)
myri10ge_alloc_rx_pages(mgp, &mgp->rx_big, mgp->big_bytes, 0);
+ return work_done;
}
static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
}
}
-static int myri10ge_poll(struct net_device *netdev, int *budget)
+static int myri10ge_poll(struct napi_struct *napi, int budget)
{
- struct myri10ge_priv *mgp = netdev_priv(netdev);
+ struct myri10ge_priv *mgp = container_of(napi, struct myri10ge_priv, napi);
+ struct net_device *netdev = mgp->dev;
struct myri10ge_rx_done *rx_done = &mgp->rx_done;
- int limit, orig_limit, work_done;
+ int work_done;
/* process as many rx events as NAPI will allow */
- limit = min(*budget, netdev->quota);
- orig_limit = limit;
- myri10ge_clean_rx_done(mgp, &limit);
- work_done = orig_limit - limit;
- *budget -= work_done;
- netdev->quota -= work_done;
+ work_done = myri10ge_clean_rx_done(mgp, budget);
if (rx_done->entry[rx_done->idx].length == 0 || !netif_running(netdev)) {
- netif_rx_complete(netdev);
+ netif_rx_complete(netdev, napi);
put_be32(htonl(3), mgp->irq_claim);
- return 0;
}
- return 1;
+ return work_done;
}
static irqreturn_t myri10ge_intr(int irq, void *arg)
/* low bit indicates receives are present, so schedule
* napi poll handler */
if (stats->valid & 1)
- netif_rx_schedule(mgp->dev);
+ netif_rx_schedule(mgp->dev, &mgp->napi);
if (!mgp->msi_enabled) {
put_be32(0, mgp->irq_deassert);
mgp->link_state = htonl(~0U);
mgp->rdma_tags_available = 15;
- netif_poll_enable(mgp->dev); /* must happen prior to any irq */
+ napi_enable(&mgp->napi); /* must happen prior to any irq */
status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
if (status) {
del_timer_sync(&mgp->watchdog_timer);
mgp->running = MYRI10GE_ETH_STOPPING;
- netif_poll_disable(mgp->dev);
+ napi_disable(&mgp->napi);
netif_carrier_off(dev);
netif_stop_queue(dev);
old_down_cnt = mgp->down_cnt;
mgp = netdev_priv(netdev);
memset(mgp, 0, sizeof(*mgp));
mgp->dev = netdev;
+ netif_napi_add(netdev, &mgp->napi,
+ myri10ge_poll, myri10ge_napi_weight);
mgp->pdev = pdev;
mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
mgp->pause = myri10ge_flow_control;
netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
if (dac_enabled)
netdev->features |= NETIF_F_HIGHDMA;
- netdev->poll = myri10ge_poll;
- netdev->weight = myri10ge_napi_weight;
/* make sure we can get an irq, and that MSI can be
* setup (if available). Also ensure netdev->irq
/* address of a sent-in-place packet/buffer, for later free() */
struct sk_buff *tx_skbuff[TX_RING_SIZE];
dma_addr_t tx_dma[TX_RING_SIZE];
+ struct net_device *dev;
+ struct napi_struct napi;
struct net_device_stats stats;
/* Media monitoring timer */
struct timer_list timer;
static int start_tx(struct sk_buff *skb, struct net_device *dev);
static irqreturn_t intr_handler(int irq, void *dev_instance);
static void netdev_error(struct net_device *dev, int intr_status);
-static int natsemi_poll(struct net_device *dev, int *budget);
+static int natsemi_poll(struct napi_struct *napi, int budget);
static void netdev_rx(struct net_device *dev, int *work_done, int work_to_do);
static void netdev_tx_done(struct net_device *dev);
static int natsemi_change_mtu(struct net_device *dev, int new_mtu);
dev->irq = irq;
np = netdev_priv(dev);
+ netif_napi_add(dev, &np->napi, natsemi_poll, 64);
np->pci_dev = pdev;
pci_set_drvdata(pdev, dev);
dev->do_ioctl = &netdev_ioctl;
dev->tx_timeout = &tx_timeout;
dev->watchdog_timeo = TX_TIMEOUT;
- dev->poll = natsemi_poll;
- dev->weight = 64;
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = &natsemi_poll_controller;
free_irq(dev->irq, dev);
return i;
}
+ napi_enable(&np->napi);
+
init_ring(dev);
spin_lock_irq(&np->lock);
init_registers(dev);
prefetch(&np->rx_skbuff[np->cur_rx % RX_RING_SIZE]);
- if (netif_rx_schedule_prep(dev)) {
+ if (netif_rx_schedule_prep(dev, &np->napi)) {
/* Disable interrupts and register for poll */
natsemi_irq_disable(dev);
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &np->napi);
} else
printk(KERN_WARNING
"%s: Ignoring interrupt, status %#08x, mask %#08x.\n",
/* This is the NAPI poll routine. As well as the standard RX handling
* it also handles all other interrupts that the chip might raise.
*/
-static int natsemi_poll(struct net_device *dev, int *budget)
+static int natsemi_poll(struct napi_struct *napi, int budget)
{
- struct netdev_private *np = netdev_priv(dev);
+ struct netdev_private *np = container_of(napi, struct netdev_private, napi);
+ struct net_device *dev = np->dev;
void __iomem * ioaddr = ns_ioaddr(dev);
-
- int work_to_do = min(*budget, dev->quota);
int work_done = 0;
do {
if (np->intr_status &
(IntrRxDone | IntrRxIntr | RxStatusFIFOOver |
IntrRxErr | IntrRxOverrun)) {
- netdev_rx(dev, &work_done, work_to_do);
+ netdev_rx(dev, &work_done, budget);
}
if (np->intr_status &
if (np->intr_status & IntrAbnormalSummary)
netdev_error(dev, np->intr_status);
- *budget -= work_done;
- dev->quota -= work_done;
-
- if (work_done >= work_to_do)
- return 1;
+ if (work_done >= budget)
+ return work_done;
np->intr_status = readl(ioaddr + IntrStatus);
} while (np->intr_status);
- netif_rx_complete(dev);
+ netif_rx_complete(dev, napi);
/* Reenable interrupts providing nothing is trying to shut
* the chip down. */
natsemi_irq_enable(dev);
spin_unlock(&np->lock);
- return 0;
+ return work_done;
}
/* This routine is logically part of the interrupt handler, but separated
dev->name, np->cur_tx, np->dirty_tx,
np->cur_rx, np->dirty_rx);
+ napi_disable(&np->napi);
+
/*
* FIXME: what if someone tries to close a device
* that is suspended?
* disable_irq() to enforce synchronization.
* * natsemi_poll: checks before reenabling interrupts. suspend
* sets hands_off, disables interrupts and then waits with
- * netif_poll_disable().
+ * napi_disable().
*
* Interrupts must be disabled, otherwise hands_off can cause irq storms.
*/
spin_unlock_irq(&np->lock);
enable_irq(dev->irq);
- netif_poll_disable(dev);
+ napi_disable(&np->napi);
/* Update the error counts. */
__get_stats(dev);
pci_enable_device(pdev);
/* pci_power_on(pdev); */
+ napi_enable(&np->napi);
+
natsemi_reset(dev);
init_ring(dev);
disable_irq(dev->irq);
mod_timer(&np->timer, jiffies + 1*HZ);
}
netif_device_attach(dev);
- netif_poll_enable(dev);
out:
rtnl_unlock();
return 0;
struct netxen_adapter *master;
struct net_device *netdev;
struct pci_dev *pdev;
+ struct napi_struct napi;
struct net_device_stats net_stats;
unsigned char mac_addr[ETH_ALEN];
int mtu;
static void netxen_tx_timeout_task(struct work_struct *work);
static void netxen_watchdog(unsigned long);
static int netxen_handle_int(struct netxen_adapter *, struct net_device *);
-static int netxen_nic_poll(struct net_device *dev, int *budget);
+static int netxen_nic_poll(struct napi_struct *napi, int budget);
#ifdef CONFIG_NET_POLL_CONTROLLER
static void netxen_nic_poll_controller(struct net_device *netdev);
#endif
adapter->netdev = netdev;
adapter->pdev = pdev;
+ netif_napi_add(netdev, &adapter->napi,
+ netxen_nic_poll, NETXEN_NETDEV_WEIGHT);
+
/* this will be read from FW later */
adapter->intr_scheme = -1;
netxen_nic_change_mtu(netdev, netdev->mtu);
SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
- netdev->poll = netxen_nic_poll;
- netdev->weight = NETXEN_NETDEV_WEIGHT;
#ifdef CONFIG_NET_POLL_CONTROLLER
netdev->poll_controller = netxen_nic_poll_controller;
#endif
if (!adapter->driver_mismatch)
mod_timer(&adapter->watchdog_timer, jiffies);
+ napi_enable(&adapter->napi);
+
netxen_nic_enable_int(adapter);
/* Done here again so that even if phantom sw overwrote it,
del_timer_sync(&adapter->watchdog_timer);
printk(KERN_ERR "%s: Failed to initialize port %d\n",
netxen_nic_driver_name, adapter->portnum);
+ napi_disable(&adapter->napi);
return -EIO;
}
if (adapter->macaddr_set)
netif_carrier_off(netdev);
netif_stop_queue(netdev);
+ napi_disable(&adapter->napi);
netxen_nic_disable_int(adapter);
netxen_nic_disable_int(adapter);
if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
- if (netif_rx_schedule_prep(netdev)) {
+ if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
/*
* Interrupts are already disabled.
*/
- __netif_rx_schedule(netdev);
+ __netif_rx_schedule(netdev, &adapter->napi);
} else {
static unsigned int intcount = 0;
if ((++intcount & 0xfff) == 0xfff)
return IRQ_HANDLED;
}
-static int netxen_nic_poll(struct net_device *netdev, int *budget)
+static int netxen_nic_poll(struct napi_struct *napi, int budget)
{
- struct netxen_adapter *adapter = netdev_priv(netdev);
- int work_to_do = min(*budget, netdev->quota);
+ struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
+ struct net_device *netdev = adapter->netdev;
int done = 1;
int ctx;
- int this_work_done;
- int work_done = 0;
+ int work_done;
DPRINTK(INFO, "polling for %d descriptors\n", *budget);
* packets are on one context, it gets only half of the quota,
* and ends up not processing it.
*/
- this_work_done = netxen_process_rcv_ring(adapter, ctx,
- work_to_do /
- MAX_RCV_CTX);
- work_done += this_work_done;
+ work_done += netxen_process_rcv_ring(adapter, ctx,
+ budget / MAX_RCV_CTX);
}
- netdev->quota -= work_done;
- *budget -= work_done;
-
- if (work_done >= work_to_do && netxen_nic_rx_has_work(adapter) != 0)
+ if (work_done >= budget && netxen_nic_rx_has_work(adapter) != 0)
done = 0;
if (netxen_process_cmd_ring((unsigned long)adapter) == 0)
DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
work_done, work_to_do);
if (done) {
- netif_rx_complete(netdev);
+ netif_rx_complete(netdev, napi);
netxen_nic_enable_int(adapter);
}
- return !done;
+ return work_done;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
if (*mac->rx_status & PAS_STATUS_TIMER)
reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
- netif_rx_schedule(dev);
+ netif_rx_schedule(dev, &mac->napi);
pci_write_config_dword(mac->iob_pdev,
PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
netif_start_queue(dev);
- netif_poll_enable(dev);
+ napi_enable(&mac->napi);
/* Interrupts are a bit different for our DMA controller: While
* it's got one a regular PCI device header, the interrupt there
out_rx_int:
free_irq(mac->tx_irq, dev);
out_tx_int:
- netif_poll_disable(dev);
+ napi_disable(&mac->napi);
netif_stop_queue(dev);
pasemi_mac_free_tx_resources(dev);
out_tx_resources:
}
netif_stop_queue(dev);
+ napi_disable(&mac->napi);
/* Clean out any pending buffers */
pasemi_mac_clean_tx(mac);
}
-static int pasemi_mac_poll(struct net_device *dev, int *budget)
+static int pasemi_mac_poll(struct napi_struct *napi, int budget)
{
- int pkts, limit = min(*budget, dev->quota);
- struct pasemi_mac *mac = netdev_priv(dev);
-
- pkts = pasemi_mac_clean_rx(mac, limit);
+ struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi);
+ struct net_device *dev = mac->netdev;
+ int pkts;
- dev->quota -= pkts;
- *budget -= pkts;
-
- if (pkts < limit) {
+ pkts = pasemi_mac_clean_rx(mac, budget);
+ if (pkts < budget) {
/* all done, no more packets present */
- netif_rx_complete(dev);
+ netif_rx_complete(dev, napi);
pasemi_mac_restart_rx_intr(mac);
- return 0;
- } else {
- /* used up our quantum, so reschedule */
- return 1;
}
+ return pkts;
}
static int __devinit
mac->netdev = dev;
mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
+ netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64);
+
+ dev->features = NETIF_F_HW_CSUM;
+
if (!mac->dma_pdev) {
dev_err(&pdev->dev, "Can't find DMA Controller\n");
err = -ENODEV;
dev->hard_start_xmit = pasemi_mac_start_tx;
dev->get_stats = pasemi_mac_get_stats;
dev->set_multicast_list = pasemi_mac_set_rx_mode;
- dev->weight = 64;
- dev->poll = pasemi_mac_poll;
- dev->features = NETIF_F_HW_CSUM;
/* The dma status structure is located in the I/O bridge, and
* is cache coherent.
struct pci_dev *dma_pdev;
struct pci_dev *iob_pdev;
struct phy_device *phydev;
+ struct napi_struct napi;
struct net_device_stats stats;
/* Pointer to the cacheable per-channel status registers */
unsigned int dirty_rx, /* ring entries to be freed. */
dirty_tx;
+ struct net_device *dev;
+ struct napi_struct napi;
struct net_device_stats stats;
char tx_full;
char phycount; /* number of phys found */
static void pcnet32_netif_stop(struct net_device *dev)
{
+ struct pcnet32_private *lp = netdev_priv(dev);
dev->trans_start = jiffies;
- netif_poll_disable(dev);
+#ifdef CONFIG_PCNET32_NAPI
+ napi_disable(&lp->napi);
+#endif
netif_tx_disable(dev);
}
static void pcnet32_netif_start(struct net_device *dev)
{
+ struct pcnet32_private *lp = netdev_priv(dev);
netif_wake_queue(dev);
- netif_poll_enable(dev);
+#ifdef CONFIG_PCNET32_NAPI
+ napi_enable(&lp->napi);
+#endif
}
/*
if ((1 << i) != lp->rx_ring_size)
pcnet32_realloc_rx_ring(dev, lp, i);
- dev->weight = lp->rx_ring_size / 2;
+ lp->napi.weight = lp->rx_ring_size / 2;
if (netif_running(dev)) {
pcnet32_netif_start(dev);
return;
}
-static int pcnet32_rx(struct net_device *dev, int quota)
+static int pcnet32_rx(struct net_device *dev, int budget)
{
struct pcnet32_private *lp = netdev_priv(dev);
int entry = lp->cur_rx & lp->rx_mod_mask;
int npackets = 0;
/* If we own the next entry, it's a new packet. Send it up. */
- while (quota > npackets && (short)le16_to_cpu(rxp->status) >= 0) {
+ while (npackets < budget && (short)le16_to_cpu(rxp->status) >= 0) {
pcnet32_rx_entry(dev, lp, rxp, entry);
npackets += 1;
/*
}
#ifdef CONFIG_PCNET32_NAPI
-static int pcnet32_poll(struct net_device *dev, int *budget)
+static int pcnet32_poll(struct napi_struct *napi, int budget)
{
- struct pcnet32_private *lp = netdev_priv(dev);
- int quota = min(dev->quota, *budget);
+ struct pcnet32_private *lp = container_of(napi, struct pcnet32_private, napi);
+ struct net_device *dev = lp->dev;
unsigned long ioaddr = dev->base_addr;
unsigned long flags;
+ int work_done;
u16 val;
- quota = pcnet32_rx(dev, quota);
+ work_done = pcnet32_rx(dev, budget);
spin_lock_irqsave(&lp->lock, flags);
if (pcnet32_tx(dev)) {
}
spin_unlock_irqrestore(&lp->lock, flags);
- *budget -= quota;
- dev->quota -= quota;
-
- if (dev->quota == 0) {
- return 1;
- }
-
- netif_rx_complete(dev);
-
- spin_lock_irqsave(&lp->lock, flags);
+ if (work_done < budget) {
+ spin_lock_irqsave(&lp->lock, flags);
- /* clear interrupt masks */
- val = lp->a.read_csr(ioaddr, CSR3);
- val &= 0x00ff;
- lp->a.write_csr(ioaddr, CSR3, val);
+ __netif_rx_complete(dev, napi);
- /* Set interrupt enable. */
- lp->a.write_csr(ioaddr, CSR0, CSR0_INTEN);
- mmiowb();
- spin_unlock_irqrestore(&lp->lock, flags);
+ /* clear interrupt masks */
+ val = lp->a.read_csr(ioaddr, CSR3);
+ val &= 0x00ff;
+ lp->a.write_csr(ioaddr, CSR3, val);
- return 0;
+ /* Set interrupt enable. */
+ lp->a.write_csr(ioaddr, CSR0, CSR0_INTEN);
+ mmiowb();
+ spin_unlock_irqrestore(&lp->lock, flags);
+ }
+ return work_done;
}
#endif
}
lp->pci_dev = pdev;
+ lp->dev = dev;
+
spin_lock_init(&lp->lock);
SET_MODULE_OWNER(dev);
lp->mii_if.mdio_read = mdio_read;
lp->mii_if.mdio_write = mdio_write;
+#ifdef CONFIG_PCNET32_NAPI
+ netif_napi_add(dev, &lp->napi, pcnet32_poll, lp->rx_ring_size / 2);
+#endif
+
if (fdx && !(lp->options & PCNET32_PORT_ASEL) &&
((cards_found >= MAX_UNITS) || full_duplex[cards_found]))
lp->options |= PCNET32_PORT_FD;
dev->ethtool_ops = &pcnet32_ethtool_ops;
dev->tx_timeout = pcnet32_tx_timeout;
dev->watchdog_timeo = (5 * HZ);
- dev->weight = lp->rx_ring_size / 2;
-#ifdef CONFIG_PCNET32_NAPI
- dev->poll = pcnet32_poll;
-#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = pcnet32_poll_controller;
goto err_free_ring;
}
+#ifdef CONFIG_PCNET32_NAPI
+ napi_enable(&lp->napi);
+#endif
+
/* Re-initialize the PCNET32, and start it when done. */
lp->a.write_csr(ioaddr, 1, (lp->init_dma_addr & 0xffff));
lp->a.write_csr(ioaddr, 2, (lp->init_dma_addr >> 16));
/* unlike for the lance, there is no restart needed */
}
#ifdef CONFIG_PCNET32_NAPI
- if (netif_rx_schedule_prep(dev)) {
+ if (netif_rx_schedule_prep(dev, &lp->napi)) {
u16 val;
/* set interrupt masks */
val = lp->a.read_csr(ioaddr, CSR3);
val |= 0x5f00;
lp->a.write_csr(ioaddr, CSR3, val);
mmiowb();
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &lp->napi);
break;
}
#else
- pcnet32_rx(dev, dev->weight);
+ pcnet32_rx(dev, lp->napi.weight);
if (pcnet32_tx(dev)) {
/* reset the chip to clear the error condition, then restart */
lp->a.reset(ioaddr);
del_timer_sync(&lp->watchdog_timer);
netif_stop_queue(dev);
+#ifdef CONFIG_PCNET32_NAPI
+ napi_disable(&lp->napi);
+#endif
spin_lock_irqsave(&lp->lock, flags);
{
struct gelic_net_card *card = netdev_priv(netdev);
+ napi_disable(&card->napi);
netif_stop_queue(netdev);
/* turn off DMA, force end */
* if the quota is exceeded, but the driver has still packets.
*
*/
-static int gelic_net_poll(struct net_device *netdev, int *budget)
+static int gelic_net_poll(struct napi_struct *napi, int budget)
{
- struct gelic_net_card *card = netdev_priv(netdev);
- int packets_to_do, packets_done = 0;
- int no_more_packets = 0;
-
- packets_to_do = min(*budget, netdev->quota);
+ struct gelic_net_card *card = container_of(napi, struct gelic_net_card, napi);
+ struct net_device *netdev = card->netdev;
+ int packets_done = 0;
- while (packets_to_do) {
- if (gelic_net_decode_one_descr(card)) {
- packets_done++;
- packets_to_do--;
- } else {
- /* no more packets for the stack */
- no_more_packets = 1;
+ while (packets_done < budget) {
+ if (!gelic_net_decode_one_descr(card))
break;
- }
+
+ packets_done++;
}
- netdev->quota -= packets_done;
- *budget -= packets_done;
- if (no_more_packets) {
- netif_rx_complete(netdev);
+
+ if (packets_done < budget) {
+ netif_rx_complete(netdev, napi);
gelic_net_rx_irq_on(card);
- return 0;
- } else
- return 1;
+ }
+ return packets_done;
}
/**
* gelic_net_change_mtu - changes the MTU of an interface
if (status & GELIC_NET_RXINT) {
gelic_net_rx_irq_off(card);
- netif_rx_schedule(netdev);
+ netif_rx_schedule(netdev, &card->napi);
}
if (status & GELIC_NET_TXINT) {
if (gelic_net_alloc_rx_skbs(card))
goto alloc_skbs_failed;
+ napi_enable(&card->napi);
+
card->tx_dma_progress = 0;
card->ghiintmask = GELIC_NET_RXINT | GELIC_NET_TXINT;
/* tx watchdog */
netdev->tx_timeout = &gelic_net_tx_timeout;
netdev->watchdog_timeo = GELIC_NET_WATCHDOG_TIMEOUT;
- /* NAPI */
- netdev->poll = &gelic_net_poll;
- netdev->weight = GELIC_NET_NAPI_WEIGHT;
netdev->ethtool_ops = &gelic_net_ethtool_ops;
}
gelic_net_setup_netdev_ops(netdev);
+ netif_napi_add(netdev, &card->napi,
+ gelic_net_poll, GELIC_NET_NAPI_WEIGHT);
+
netdev->features = NETIF_F_IP_CSUM;
status = lv1_net_control(bus_id(card), dev_id(card),
struct gelic_net_card {
struct net_device *netdev;
+ struct napi_struct napi;
/*
* hypervisor requires irq_status should be
* 8 bytes aligned, but u64 member is
return work_done;
}
-static int ql_poll(struct net_device *ndev, int *budget)
+static int ql_poll(struct napi_struct *napi, int budget)
{
- struct ql3_adapter *qdev = netdev_priv(ndev);
- int work_to_do = min(*budget, ndev->quota);
+ struct ql3_adapter *qdev = container_of(napi, struct ql3_adapter, napi);
+ struct net_device *ndev = qdev->ndev;
int rx_cleaned = 0, tx_cleaned = 0;
unsigned long hw_flags;
struct ql3xxx_port_registers __iomem *port_regs = qdev->mem_map_registers;
if (!netif_carrier_ok(ndev))
goto quit_polling;
- ql_tx_rx_clean(qdev, &tx_cleaned, &rx_cleaned, work_to_do);
- *budget -= rx_cleaned;
- ndev->quota -= rx_cleaned;
+ ql_tx_rx_clean(qdev, &tx_cleaned, &rx_cleaned, budget);
- if( tx_cleaned + rx_cleaned != work_to_do ||
+ if (tx_cleaned + rx_cleaned != budget ||
!netif_running(ndev)) {
quit_polling:
- netif_rx_complete(ndev);
-
spin_lock_irqsave(&qdev->hw_lock, hw_flags);
+ __netif_rx_complete(ndev, napi);
ql_update_small_bufq_prod_index(qdev);
ql_update_lrg_bufq_prod_index(qdev);
writel(qdev->rsp_consumer_index,
spin_unlock_irqrestore(&qdev->hw_lock, hw_flags);
ql_enable_interrupts(qdev);
- return 0;
}
- return 1;
+ return tx_cleaned + rx_cleaned;
}
static irqreturn_t ql3xxx_isr(int irq, void *dev_id)
spin_unlock(&qdev->adapter_lock);
} else if (value & ISP_IMR_DISABLE_CMPL_INT) {
ql_disable_interrupts(qdev);
- if (likely(netif_rx_schedule_prep(ndev))) {
- __netif_rx_schedule(ndev);
+ if (likely(netif_rx_schedule_prep(ndev, &qdev->napi))) {
+ __netif_rx_schedule(ndev, &qdev->napi);
}
} else {
return IRQ_NONE;
del_timer_sync(&qdev->adapter_timer);
- netif_poll_disable(ndev);
+ napi_disable(&qdev->napi);
if (do_reset) {
int soft_reset;
mod_timer(&qdev->adapter_timer, jiffies + HZ * 1);
- netif_poll_enable(ndev);
+ napi_enable(&qdev->napi);
ql_enable_interrupts(qdev);
return 0;
ndev->tx_timeout = ql3xxx_tx_timeout;
ndev->watchdog_timeo = 5 * HZ;
- ndev->poll = &ql_poll;
- ndev->weight = 64;
+ netif_napi_add(ndev, &qdev->napi, ql_poll, 64);
ndev->irq = pdev->irq;
struct pci_dev *pdev;
struct net_device *ndev; /* Parent NET device */
+ struct napi_struct napi;
+
/* Hardware information */
u8 chip_rev_id;
u8 pci_slot;
void __iomem *mmio_addr; /* memory map physical address */
struct pci_dev *pci_dev; /* Index of PCI device */
struct net_device *dev;
+ struct napi_struct napi;
struct net_device_stats stats; /* statistics of net device */
spinlock_t lock; /* spin lock flag */
u32 msg_enable;
static void rtl8169_tx_timeout(struct net_device *dev);
static struct net_device_stats *rtl8169_get_stats(struct net_device *dev);
static int rtl8169_rx_interrupt(struct net_device *, struct rtl8169_private *,
- void __iomem *);
+ void __iomem *, u32 budget);
static int rtl8169_change_mtu(struct net_device *dev, int new_mtu);
static void rtl8169_down(struct net_device *dev);
static void rtl8169_rx_clear(struct rtl8169_private *tp);
#ifdef CONFIG_R8169_NAPI
-static int rtl8169_poll(struct net_device *dev, int *budget);
+static int rtl8169_poll(struct napi_struct *napi, int budget);
#endif
static const unsigned int rtl8169_rx_config =
dev->set_mac_address = rtl_set_mac_address;
#ifdef CONFIG_R8169_NAPI
- dev->poll = rtl8169_poll;
- dev->weight = R8169_NAPI_WEIGHT;
+ netif_napi_add(dev, &tp->napi, rtl8169_poll, R8169_NAPI_WEIGHT);
#endif
#ifdef CONFIG_R8169_VLAN
if (retval < 0)
goto err_release_ring_2;
+#ifdef CONFIG_R8169_NAPI
+ napi_enable(&tp->napi);
+#endif
+
rtl_hw_start(dev);
rtl8169_request_timer(dev);
if (ret < 0)
goto out;
- netif_poll_enable(dev);
+#ifdef CONFIG_R8169_NAPI
+ napi_enable(&tp->napi);
+#endif
rtl_hw_start(dev);
synchronize_irq(dev->irq);
/* Wait for any pending NAPI task to complete */
- netif_poll_disable(dev);
+#ifdef CONFIG_R8169_NAPI
+ napi_disable(&tp->napi);
+#endif
rtl8169_irq_mask_and_ack(ioaddr);
- netif_poll_enable(dev);
+#ifdef CONFIG_R8169_NAPI
+ napi_enable(&tp->napi);
+#endif
}
static void rtl8169_reinit_task(struct work_struct *work)
rtl8169_wait_for_quiescence(dev);
- rtl8169_rx_interrupt(dev, tp, tp->mmio_addr);
+ rtl8169_rx_interrupt(dev, tp, tp->mmio_addr, ~(u32)0);
rtl8169_tx_clear(tp);
if (tp->dirty_rx == tp->cur_rx) {
static int rtl8169_rx_interrupt(struct net_device *dev,
struct rtl8169_private *tp,
- void __iomem *ioaddr)
+ void __iomem *ioaddr, u32 budget)
{
unsigned int cur_rx, rx_left;
unsigned int delta, count;
cur_rx = tp->cur_rx;
rx_left = NUM_RX_DESC + tp->dirty_rx - cur_rx;
- rx_left = rtl8169_rx_quota(rx_left, (u32) dev->quota);
+ rx_left = rtl8169_rx_quota(rx_left, budget);
for (; rx_left > 0; rx_left--, cur_rx++) {
unsigned int entry = cur_rx % NUM_RX_DESC;
RTL_W16(IntrMask, tp->intr_event & ~tp->napi_event);
tp->intr_mask = ~tp->napi_event;
- if (likely(netif_rx_schedule_prep(dev)))
- __netif_rx_schedule(dev);
+ if (likely(netif_rx_schedule_prep(dev, &tp->napi)))
+ __netif_rx_schedule(dev, &tp->napi);
else if (netif_msg_intr(tp)) {
printk(KERN_INFO "%s: interrupt %04x in poll\n",
dev->name, status);
#else
/* Rx interrupt */
if (status & (RxOK | RxOverflow | RxFIFOOver))
- rtl8169_rx_interrupt(dev, tp, ioaddr);
+ rtl8169_rx_interrupt(dev, tp, ioaddr, ~(u32)0);
/* Tx interrupt */
if (status & (TxOK | TxErr))
}
#ifdef CONFIG_R8169_NAPI
-static int rtl8169_poll(struct net_device *dev, int *budget)
+static int rtl8169_poll(struct napi_struct *napi, int budget)
{
- unsigned int work_done, work_to_do = min(*budget, dev->quota);
- struct rtl8169_private *tp = netdev_priv(dev);
+ struct rtl8169_private *tp = container_of(napi, struct rtl8169_private, napi);
+ struct net_device *dev = tp->dev;
void __iomem *ioaddr = tp->mmio_addr;
+ int work_done;
- work_done = rtl8169_rx_interrupt(dev, tp, ioaddr);
+ work_done = rtl8169_rx_interrupt(dev, tp, ioaddr, (u32) budget);
rtl8169_tx_interrupt(dev, tp, ioaddr);
- *budget -= work_done;
- dev->quota -= work_done;
-
- if (work_done < work_to_do) {
- netif_rx_complete(dev);
+ if (work_done < budget) {
+ netif_rx_complete(dev, napi);
tp->intr_mask = 0xffff;
/*
* 20040426: the barrier is not strictly required but the
RTL_W16(IntrMask, tp->intr_event);
}
- return (work_done >= work_to_do);
+ return work_done;
}
#endif
synchronize_irq(dev->irq);
if (!poll_locked) {
- netif_poll_disable(dev);
+ napi_disable(&tp->napi);
poll_locked++;
}
free_irq(dev->irq, dev);
- netif_poll_enable(dev);
-
pci_free_consistent(pdev, R8169_RX_RING_BYTES, tp->RxDescArray,
tp->RxPhyAddr);
pci_free_consistent(pdev, R8169_TX_RING_BYTES, tp->TxDescArray,
/**
* s2io_poll - Rx interrupt handler for NAPI support
- * @dev : pointer to the device structure.
+ * @napi : pointer to the napi structure.
* @budget : The number of packets that were budgeted to be processed
* during one pass through the 'Poll" function.
* Description:
* 0 on success and 1 if there are No Rx packets to be processed.
*/
-static int s2io_poll(struct net_device *dev, int *budget)
+static int s2io_poll(struct napi_struct *napi, int budget)
{
- struct s2io_nic *nic = dev->priv;
+ struct s2io_nic *nic = container_of(napi, struct s2io_nic, napi);
+ struct net_device *dev = nic->dev;
int pkt_cnt = 0, org_pkts_to_process;
struct mac_info *mac_control;
struct config_param *config;
mac_control = &nic->mac_control;
config = &nic->config;
- nic->pkts_to_process = *budget;
- if (nic->pkts_to_process > dev->quota)
- nic->pkts_to_process = dev->quota;
+ nic->pkts_to_process = budget;
org_pkts_to_process = nic->pkts_to_process;
writeq(S2IO_MINUS_ONE, &bar0->rx_traffic_int);
goto no_rx;
}
}
- if (!pkt_cnt)
- pkt_cnt = 1;
- dev->quota -= pkt_cnt;
- *budget -= pkt_cnt;
- netif_rx_complete(dev);
+ netif_rx_complete(dev, napi);
for (i = 0; i < config->rx_ring_num; i++) {
if (fill_rx_buffers(nic, i) == -ENOMEM) {
writeq(0x0, &bar0->rx_traffic_mask);
readl(&bar0->rx_traffic_mask);
atomic_dec(&nic->isr_cnt);
- return 0;
+ return pkt_cnt;
no_rx:
- dev->quota -= pkt_cnt;
- *budget -= pkt_cnt;
-
for (i = 0; i < config->rx_ring_num; i++) {
if (fill_rx_buffers(nic, i) == -ENOMEM) {
DBG_PRINT(INFO_DBG, "%s:Out of memory", dev->name);
}
}
atomic_dec(&nic->isr_cnt);
- return 1;
+ return pkt_cnt;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
netif_carrier_off(dev);
sp->last_link_state = 0;
+ napi_enable(&sp->napi);
+
/* Initialize H/W and enable interrupts */
err = s2io_card_up(sp);
if (err) {
return 0;
hw_init_failed:
+ napi_disable(&sp->napi);
if (sp->intr_type == MSI_X) {
if (sp->entries) {
kfree(sp->entries);
struct s2io_nic *sp = dev->priv;
netif_stop_queue(dev);
+ napi_disable(&sp->napi);
/* Reset card, kill tasklet and free Tx and Rx buffers. */
s2io_card_down(sp);
if (napi) {
if (reason & GEN_INTR_RXTRAFFIC) {
- if ( likely ( netif_rx_schedule_prep(dev)) ) {
- __netif_rx_schedule(dev);
+ if (likely (netif_rx_schedule_prep(dev, &sp->napi))) {
+ __netif_rx_schedule(dev, &sp->napi);
writeq(S2IO_MINUS_ONE, &bar0->rx_traffic_mask);
}
else
* will use eth_mac_addr() for dev->set_mac_address
* mac address will be set every time dev->open() is called
*/
- dev->poll = s2io_poll;
- dev->weight = 32;
+ netif_napi_add(dev, &sp->napi, s2io_poll, 32);
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = s2io_netpoll;
*/
int pkts_to_process;
struct net_device *dev;
+ struct napi_struct napi;
struct mac_info mac_control;
struct config_param config;
struct pci_dev *pdev;
static int rx_osm_handler(struct ring_info *ring_data, struct RxD_t * rxdp);
static void s2io_link(struct s2io_nic * sp, int link);
static void s2io_reset(struct s2io_nic * sp);
-static int s2io_poll(struct net_device *dev, int *budget);
+static int s2io_poll(struct napi_struct *napi, int budget);
static void s2io_init_pci(struct s2io_nic * sp);
static int s2io_set_mac_addr(struct net_device *dev, u8 * addr);
static void s2io_alarm_handle(unsigned long data);
*/
struct net_device *sbm_dev; /* pointer to linux device */
+ struct napi_struct napi;
spinlock_t sbm_lock; /* spin lock */
struct timer_list sbm_timer; /* for monitoring MII */
struct net_device_stats sbm_stats;
static void sbmac_set_rx_mode(struct net_device *dev);
static int sbmac_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static int sbmac_close(struct net_device *dev);
-static int sbmac_poll(struct net_device *poll_dev, int *budget);
+static int sbmac_poll(struct napi_struct *napi, int budget);
static int sbmac_mii_poll(struct sbmac_softc *s,int noisy);
static int sbmac_mii_probe(struct net_device *dev);
* Transmits on channel 0
*/
- if (isr & (M_MAC_INT_CHANNEL << S_MAC_TX_CH0)) {
+ if (isr & (M_MAC_INT_CHANNEL << S_MAC_TX_CH0))
sbdma_tx_process(sc,&(sc->sbm_txdma), 0);
-#ifdef CONFIG_NETPOLL_TRAP
- if (netpoll_trap()) {
- if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
- __netif_schedule(dev);
- }
-#endif
- }
if (isr & (M_MAC_INT_CHANNEL << S_MAC_RX_CH0)) {
- if (netif_rx_schedule_prep(dev)) {
+ if (netif_rx_schedule_prep(dev, &sc->napi)) {
__raw_writeq(0, sc->sbm_imr);
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &sc->napi);
/* Depend on the exit from poll to reenable intr */
}
else {
dev->do_ioctl = sbmac_mii_ioctl;
dev->tx_timeout = sbmac_tx_timeout;
dev->watchdog_timeo = TX_TIMEOUT;
- dev->poll = sbmac_poll;
- dev->weight = 16;
+
+ netif_napi_add(dev, &sc->napi, sbmac_poll, 16);
dev->change_mtu = sb1250_change_mtu;
#ifdef CONFIG_NET_POLL_CONTROLLER
return -EINVAL;
}
+ napi_enable(&sc->napi);
+
/*
* Configure default speed
*/
unsigned long flags;
int irq;
+ napi_disable(&sc->napi);
+
sbmac_set_channel_state(sc,sbmac_state_off);
del_timer_sync(&sc->sbm_timer);
return 0;
}
-static int sbmac_poll(struct net_device *dev, int *budget)
+static int sbmac_poll(struct napi_struct *napi, int budget)
{
- int work_to_do;
+ struct sbmac_softc *sc = container_of(napi, struct sbmac_softc, napi);
+ struct net_device *dev = sc->sbm_dev;
int work_done;
- struct sbmac_softc *sc = netdev_priv(dev);
-
- work_to_do = min(*budget, dev->quota);
- work_done = sbdma_rx_process(sc, &(sc->sbm_rxdma), work_to_do, 1);
-
- if (work_done > work_to_do)
- printk(KERN_ERR "%s exceeded work_to_do budget=%d quota=%d work-done=%d\n",
- sc->sbm_dev->name, *budget, dev->quota, work_done);
+ work_done = sbdma_rx_process(sc, &(sc->sbm_rxdma), budget, 1);
sbdma_tx_process(sc, &(sc->sbm_txdma), 1);
- *budget -= work_done;
- dev->quota -= work_done;
-
- if (work_done < work_to_do) {
- netif_rx_complete(dev);
+ if (work_done < budget) {
+ netif_rx_complete(dev, napi);
#ifdef CONFIG_SBMAC_COALESCE
__raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) |
#endif
}
- return (work_done >= work_to_do);
+ return work_done;
}
#if defined(SBMAC_ETH0_HWADDR) || defined(SBMAC_ETH1_HWADDR) || defined(SBMAC_ETH2_HWADDR) || defined(SBMAC_ETH3_HWADDR)
#define PHY_ID_ANY 0x1f
#define MII_REG_ANY 0x1f
-#ifdef CONFIG_SIS190_NAPI
-#define NAPI_SUFFIX "-NAPI"
-#else
-#define NAPI_SUFFIX ""
-#endif
-
-#define DRV_VERSION "1.2" NAPI_SUFFIX
+#define DRV_VERSION "1.2"
#define DRV_NAME "sis190"
#define SIS190_DRIVER_NAME DRV_NAME " Gigabit Ethernet driver " DRV_VERSION
#define PFX DRV_NAME ": "
-#ifdef CONFIG_SIS190_NAPI
-#define sis190_rx_skb netif_receive_skb
-#define sis190_rx_quota(count, quota) min(count, quota)
-#else
#define sis190_rx_skb netif_rx
#define sis190_rx_quota(count, quota) count
-#endif
#define MAC_ADDR_LEN 6
synchronize_irq(dev->irq);
- if (!poll_locked) {
- netif_poll_disable(dev);
+ if (!poll_locked)
poll_locked++;
- }
synchronize_sched();
free_irq(dev->irq, dev);
- netif_poll_enable(dev);
-
pci_free_consistent(pdev, TX_RING_BYTES, tp->TxDescRing, tp->tx_dma);
pci_free_consistent(pdev, RX_RING_BYTES, tp->RxDescRing, tp->rx_dma);
skge_write32(hw, B0_IMSK, hw->intr_mask);
spin_unlock_irq(&hw->hw_lock);
- netif_poll_enable(dev);
+ napi_enable(&skge->napi);
return 0;
free_rx_ring:
if (hw->chip_id == CHIP_ID_GENESIS && hw->phy_type == SK_PHY_XMAC)
del_timer_sync(&skge->link_timer);
- netif_poll_disable(dev);
+ napi_disable(&skge->napi);
netif_carrier_off(dev);
spin_lock_irq(&hw->hw_lock);
}
}
-static int skge_poll(struct net_device *dev, int *budget)
+static int skge_poll(struct napi_struct *napi, int to_do)
{
- struct skge_port *skge = netdev_priv(dev);
+ struct skge_port *skge = container_of(napi, struct skge_port, napi);
+ struct net_device *dev = skge->netdev;
struct skge_hw *hw = skge->hw;
struct skge_ring *ring = &skge->rx_ring;
struct skge_element *e;
- unsigned long flags;
- int to_do = min(dev->quota, *budget);
int work_done = 0;
skge_tx_done(dev);
wmb();
skge_write8(hw, Q_ADDR(rxqaddr[skge->port], Q_CSR), CSR_START);
- *budget -= work_done;
- dev->quota -= work_done;
-
- if (work_done >= to_do)
- return 1; /* not done */
-
- spin_lock_irqsave(&hw->hw_lock, flags);
- __netif_rx_complete(dev);
- hw->intr_mask |= napimask[skge->port];
- skge_write32(hw, B0_IMSK, hw->intr_mask);
- skge_read32(hw, B0_IMSK);
- spin_unlock_irqrestore(&hw->hw_lock, flags);
+ if (work_done < to_do) {
+ spin_lock_irq(&hw->hw_lock);
+ __netif_rx_complete(dev, napi);
+ hw->intr_mask |= napimask[skge->port];
+ skge_write32(hw, B0_IMSK, hw->intr_mask);
+ skge_read32(hw, B0_IMSK);
+ spin_unlock_irq(&hw->hw_lock);
+ }
- return 0;
+ return work_done;
}
/* Parity errors seem to happen when Genesis is connected to a switch
}
if (status & (IS_XA1_F|IS_R1_F)) {
+ struct skge_port *skge = netdev_priv(hw->dev[0]);
hw->intr_mask &= ~(IS_XA1_F|IS_R1_F);
- netif_rx_schedule(hw->dev[0]);
+ netif_rx_schedule(hw->dev[0], &skge->napi);
}
if (status & IS_PA_TO_TX1)
skge_mac_intr(hw, 0);
if (hw->dev[1]) {
+ struct skge_port *skge = netdev_priv(hw->dev[1]);
+
if (status & (IS_XA2_F|IS_R2_F)) {
hw->intr_mask &= ~(IS_XA2_F|IS_R2_F);
- netif_rx_schedule(hw->dev[1]);
+ netif_rx_schedule(hw->dev[1], &skge->napi);
}
if (status & IS_PA_TO_RX2) {
- struct skge_port *skge = netdev_priv(hw->dev[1]);
++skge->net_stats.rx_over_errors;
skge_write16(hw, B3_PA_CTRL, PA_CLR_TO_RX2);
}
SET_ETHTOOL_OPS(dev, &skge_ethtool_ops);
dev->tx_timeout = skge_tx_timeout;
dev->watchdog_timeo = TX_WATCHDOG;
- dev->poll = skge_poll;
- dev->weight = NAPI_WEIGHT;
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = skge_netpoll;
#endif
dev->features |= NETIF_F_HIGHDMA;
skge = netdev_priv(dev);
+ netif_napi_add(dev, &skge->napi, skge_poll, NAPI_WEIGHT);
skge->netdev = dev;
skge->hw = hw;
skge->msg_enable = netif_msg_init(debug, default_msg);
struct skge_port {
struct skge_hw *hw;
struct net_device *netdev;
+ struct napi_struct napi;
int port;
u32 msg_enable;
u16 port = sky2->port;
netif_tx_lock_bh(dev);
- netif_poll_disable(sky2->hw->dev[0]);
+ napi_disable(&hw->napi);
sky2->vlgrp = grp;
if (grp) {
TX_VLAN_TAG_OFF);
}
- netif_poll_enable(sky2->hw->dev[0]);
+ napi_enable(&hw->napi);
netif_tx_unlock_bh(dev);
}
#endif
sky2_prefetch_init(hw, txqaddr[port], sky2->tx_le_map,
TX_RING_SIZE - 1);
+ napi_enable(&hw->napi);
+
err = sky2_rx_start(sky2);
- if (err)
+ if (err) {
+ napi_disable(&hw->napi);
goto err_out;
+ }
/* Enable interrupts from phy/mac for port */
imask = sky2_read32(hw, B0_IMSK);
/* Stop more packets from being queued */
netif_stop_queue(dev);
+ napi_disable(&hw->napi);
+
/* Disable port IRQ */
imask = sky2_read32(hw, B0_IMSK);
imask &= ~portirq_msk[port];
dev->trans_start = jiffies; /* prevent tx timeout */
netif_stop_queue(dev);
- netif_poll_disable(hw->dev[0]);
+ napi_disable(&hw->napi);
synchronize_irq(hw->pdev->irq);
err = sky2_rx_start(sky2);
sky2_write32(hw, B0_IMSK, imask);
+ /* Unconditionally re-enable NAPI because even if we
+ * call dev_close() that will do a napi_disable().
+ */
+ napi_enable(&hw->napi);
+
if (err)
dev_close(dev);
else {
gma_write16(hw, port, GM_GP_CTRL, ctl);
- netif_poll_enable(hw->dev[0]);
netif_wake_queue(dev);
}
static void sky2_watchdog(unsigned long arg)
{
struct sky2_hw *hw = (struct sky2_hw *) arg;
- struct net_device *dev;
/* Check for lost IRQ once a second */
if (sky2_read32(hw, B0_ISRC)) {
- dev = hw->dev[0];
- if (__netif_rx_schedule_prep(dev))
- __netif_rx_schedule(dev);
+ napi_schedule(&hw->napi);
} else {
int i, active = 0;
for (i = 0; i < hw->ports; i++) {
- dev = hw->dev[i];
+ struct net_device *dev = hw->dev[i];
if (!netif_running(dev))
continue;
++active;
sky2_le_error(hw, 1, Q_XA2, TX_RING_SIZE);
}
-static int sky2_poll(struct net_device *dev0, int *budget)
+static int sky2_poll(struct napi_struct *napi, int work_limit)
{
- struct sky2_hw *hw = ((struct sky2_port *) netdev_priv(dev0))->hw;
- int work_done;
+ struct sky2_hw *hw = container_of(napi, struct sky2_hw, napi);
u32 status = sky2_read32(hw, B0_Y2_SP_EISR);
+ int work_done;
if (unlikely(status & Y2_IS_ERROR))
sky2_err_intr(hw, status);
if (status & Y2_IS_IRQ_PHY2)
sky2_phy_intr(hw, 1);
- work_done = sky2_status_intr(hw, min(dev0->quota, *budget));
- *budget -= work_done;
- dev0->quota -= work_done;
+ work_done = sky2_status_intr(hw, work_limit);
/* More work? */
- if (hw->st_idx != sky2_read16(hw, STAT_PUT_IDX))
- return 1;
+ if (hw->st_idx == sky2_read16(hw, STAT_PUT_IDX)) {
+ /* Bug/Errata workaround?
+ * Need to kick the TX irq moderation timer.
+ */
+ if (sky2_read8(hw, STAT_TX_TIMER_CTRL) == TIM_START) {
+ sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_STOP);
+ sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_START);
+ }
- /* Bug/Errata workaround?
- * Need to kick the TX irq moderation timer.
- */
- if (sky2_read8(hw, STAT_TX_TIMER_CTRL) == TIM_START) {
- sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_STOP);
- sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_START);
+ napi_complete(napi);
+ sky2_read32(hw, B0_Y2_SP_LISR);
}
- netif_rx_complete(dev0);
-
- sky2_read32(hw, B0_Y2_SP_LISR);
- return 0;
+ return work_done;
}
static irqreturn_t sky2_intr(int irq, void *dev_id)
{
struct sky2_hw *hw = dev_id;
- struct net_device *dev0 = hw->dev[0];
u32 status;
/* Reading this mask interrupts as side effect */
return IRQ_NONE;
prefetch(&hw->st_le[hw->st_idx]);
- if (likely(__netif_rx_schedule_prep(dev0)))
- __netif_rx_schedule(dev0);
+
+ napi_schedule(&hw->napi);
return IRQ_HANDLED;
}
static void sky2_netpoll(struct net_device *dev)
{
struct sky2_port *sky2 = netdev_priv(dev);
- struct net_device *dev0 = sky2->hw->dev[0];
- if (netif_running(dev) && __netif_rx_schedule_prep(dev0))
- __netif_rx_schedule(dev0);
+ napi_schedule(&sky2->hw->napi);
}
#endif
sky2_write32(hw, B0_IMSK, 0);
sky2_read32(hw, B0_IMSK);
- netif_poll_disable(hw->dev[0]);
-
for (i = 0; i < hw->ports; i++) {
dev = hw->dev[i];
if (netif_running(dev))
sky2_reset(hw);
sky2_write32(hw, B0_IMSK, Y2_IS_BASE);
- netif_poll_enable(hw->dev[0]);
for (i = 0; i < hw->ports; i++) {
dev = hw->dev[i];
{
struct net_device *dev = seq->private;
const struct sky2_port *sky2 = netdev_priv(dev);
- const struct sky2_hw *hw = sky2->hw;
+ struct sky2_hw *hw = sky2->hw;
unsigned port = sky2->port;
unsigned idx, last;
int sop;
sky2_read32(hw, B0_IMSK),
sky2_read32(hw, B0_Y2_SP_ICR));
- netif_poll_disable(hw->dev[0]);
+ napi_disable(&hw->napi);
last = sky2_read16(hw, STAT_PUT_IDX);
if (hw->st_idx == last)
last = sky2_read16(hw, Y2_QADDR(rxqaddr[port], PREF_UNIT_PUT_IDX)),
sky2_read16(hw, Y2_QADDR(rxqaddr[port], PREF_UNIT_LAST_IDX)));
- netif_poll_enable(hw->dev[0]);
+ napi_enable(&hw->napi);
return 0;
}
SET_ETHTOOL_OPS(dev, &sky2_ethtool_ops);
dev->tx_timeout = sky2_tx_timeout;
dev->watchdog_timeo = TX_WATCHDOG;
- if (port == 0)
- dev->poll = sky2_poll;
- dev->weight = NAPI_WEIGHT;
#ifdef CONFIG_NET_POLL_CONTROLLER
- /* Network console (only works on port 0)
- * because netpoll makes assumptions about NAPI
- */
- if (port == 0)
- dev->poll_controller = sky2_netpoll;
+ dev->poll_controller = sky2_netpoll;
#endif
sky2 = netdev_priv(dev);
err = -ENOMEM;
goto err_out_free_pci;
}
+ netif_napi_add(dev, &hw->napi, sky2_poll, NAPI_WEIGHT);
if (!disable_msi && pci_enable_msi(pdev) == 0) {
err = sky2_test_msi(hw);
if (!hw)
return 0;
- netif_poll_disable(hw->dev[0]);
-
for (i = 0; i < hw->ports; i++) {
struct net_device *dev = hw->dev[i];
struct sky2_port *sky2 = netdev_priv(dev);
}
}
- netif_poll_enable(hw->dev[0]);
-
return 0;
out:
dev_err(&pdev->dev, "resume failed (%d)\n", err);
if (!hw)
return;
- netif_poll_disable(hw->dev[0]);
+ napi_disable(&hw->napi);
for (i = 0; i < hw->ports; i++) {
struct net_device *dev = hw->dev[i];
struct sky2_hw {
void __iomem *regs;
struct pci_dev *pdev;
+ struct napi_struct napi;
struct net_device *dev[2];
unsigned long flags;
#define SKY2_HW_USE_MSI 0x00000001
* (using netif_receive_skb). If all/enough packets are up, the driver
* reenables interrupts and returns 0. If not, 1 is returned.
*/
-static int
-spider_net_poll(struct net_device *netdev, int *budget)
+static int spider_net_poll(struct napi_struct *napi, int budget)
{
- struct spider_net_card *card = netdev_priv(netdev);
- int packets_to_do, packets_done = 0;
- int no_more_packets = 0;
-
- packets_to_do = min(*budget, netdev->quota);
-
- while (packets_to_do) {
- if (spider_net_decode_one_descr(card)) {
- packets_done++;
- packets_to_do--;
- } else {
- /* no more packets for the stack */
- no_more_packets = 1;
+ struct spider_net_card *card = container_of(napi, struct spider_net_card, napi);
+ struct net_device *netdev = card->netdev;
+ int packets_done = 0;
+
+ while (packets_done < budget) {
+ if (!spider_net_decode_one_descr(card))
break;
- }
+
+ packets_done++;
}
if ((packets_done == 0) && (card->num_rx_ints != 0)) {
- no_more_packets = spider_net_resync_tail_ptr(card);
+ if (!spider_net_resync_tail_ptr(card))
+ packets_done = budget;
spider_net_resync_head_ptr(card);
}
card->num_rx_ints = 0;
- netdev->quota -= packets_done;
- *budget -= packets_done;
spider_net_refill_rx_chain(card);
spider_net_enable_rxdmac(card);
/* if all packets are in the stack, enable interrupts and return 0 */
/* if not, return 1 */
- if (no_more_packets) {
- netif_rx_complete(netdev);
+ if (packets_done < budget) {
+ netif_rx_complete(netdev, napi);
spider_net_rx_irq_on(card);
card->ignore_rx_ramfull = 0;
- return 0;
}
- return 1;
+ return packets_done;
}
/**
spider_net_refill_rx_chain(card);
spider_net_enable_rxdmac(card);
card->num_rx_ints ++;
- netif_rx_schedule(card->netdev);
+ netif_rx_schedule(card->netdev,
+ &card->napi);
}
show_error = 0;
break;
spider_net_refill_rx_chain(card);
spider_net_enable_rxdmac(card);
card->num_rx_ints ++;
- netif_rx_schedule(card->netdev);
+ netif_rx_schedule(card->netdev,
+ &card->napi);
show_error = 0;
break;
spider_net_refill_rx_chain(card);
spider_net_enable_rxdmac(card);
card->num_rx_ints ++;
- netif_rx_schedule(card->netdev);
+ netif_rx_schedule(card->netdev,
+ &card->napi);
show_error = 0;
break;
if (status_reg & SPIDER_NET_RXINT ) {
spider_net_rx_irq_off(card);
- netif_rx_schedule(netdev);
+ netif_rx_schedule(netdev, &card->napi);
card->num_rx_ints ++;
}
if (status_reg & SPIDER_NET_TXINT)
- netif_rx_schedule(netdev);
+ netif_rx_schedule(netdev, &card->napi);
if (status_reg & SPIDER_NET_LINKINT)
spider_net_link_reset(netdev);
netif_start_queue(netdev);
netif_carrier_on(netdev);
- netif_poll_enable(netdev);
+ napi_enable(&card->napi);
spider_net_enable_interrupts(card);
{
struct spider_net_card *card = netdev_priv(netdev);
- netif_poll_disable(netdev);
+ napi_disable(&card->napi);
netif_carrier_off(netdev);
netif_stop_queue(netdev);
del_timer_sync(&card->tx_timer);
/* tx watchdog */
netdev->tx_timeout = &spider_net_tx_timeout;
netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
- /* NAPI */
- netdev->poll = &spider_net_poll;
- netdev->weight = SPIDER_NET_NAPI_WEIGHT;
/* HW VLAN */
#ifdef CONFIG_NET_POLL_CONTROLLER
/* poll controller */
card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
+ netif_napi_add(netdev, &card->napi,
+ spider_net_poll, SPIDER_NET_NAPI_WEIGHT);
+
spider_net_setup_netdev_ops(netdev);
netdev->features = NETIF_F_IP_CSUM | NETIF_F_LLTX;
struct pci_dev *pdev;
struct mii_phy phy;
+ struct napi_struct napi;
+
int medium;
void __iomem *regs;
#define skb_num_frags(skb) (skb_shinfo(skb)->nr_frags + 1)
#ifdef HAVE_NETDEV_POLL
-#define init_poll(dev) \
-do { \
- dev->poll = &netdev_poll; \
- dev->weight = max_interrupt_work; \
-} while (0)
-#define netdev_rx(dev, ioaddr) \
+#define init_poll(dev, np) \
+ netif_napi_add(dev, &np->napi, netdev_poll, max_interrupt_work)
+#define netdev_rx(dev, np, ioaddr) \
do { \
u32 intr_enable; \
- if (netif_rx_schedule_prep(dev)) { \
- __netif_rx_schedule(dev); \
+ if (netif_rx_schedule_prep(dev, &np->napi)) { \
+ __netif_rx_schedule(dev, &np->napi); \
intr_enable = readl(ioaddr + IntrEnable); \
intr_enable &= ~(IntrRxDone | IntrRxEmpty); \
writel(intr_enable, ioaddr + IntrEnable); \
} while (0)
#define netdev_receive_skb(skb) netif_receive_skb(skb)
#define vlan_netdev_receive_skb(skb, vlgrp, vlid) vlan_hwaccel_receive_skb(skb, vlgrp, vlid)
-static int netdev_poll(struct net_device *dev, int *budget);
+static int netdev_poll(struct napi_struct *napi, int budget);
#else /* not HAVE_NETDEV_POLL */
-#define init_poll(dev)
+#define init_poll(dev, np)
#define netdev_receive_skb(skb) netif_rx(skb)
#define vlan_netdev_receive_skb(skb, vlgrp, vlid) vlan_hwaccel_rx(skb, vlgrp, vlid)
-#define netdev_rx(dev, ioaddr) \
+#define netdev_rx(dev, np, ioaddr) \
do { \
int quota = np->dirty_rx + RX_RING_SIZE - np->cur_rx; \
__netdev_rx(dev, "a);\
struct tx_done_desc *tx_done_q;
dma_addr_t tx_done_q_dma;
unsigned int tx_done;
+ struct napi_struct napi;
+ struct net_device *dev;
struct net_device_stats stats;
struct pci_dev *pci_dev;
#ifdef VLAN_SUPPORT
dev->irq = irq;
np = netdev_priv(dev);
+ np->dev = dev;
np->base = base;
spin_lock_init(&np->lock);
pci_set_drvdata(pdev, dev);
dev->hard_start_xmit = &start_tx;
dev->tx_timeout = tx_timeout;
dev->watchdog_timeo = TX_TIMEOUT;
- init_poll(dev);
+ init_poll(dev, np);
dev->stop = &netdev_close;
dev->get_stats = &get_stats;
dev->set_multicast_list = &set_rx_mode;
writel(np->intr_timer_ctrl, ioaddr + IntrTimerCtrl);
+#ifdef HAVE_NETDEV_POLL
+ napi_enable(&np->napi);
+#endif
netif_start_queue(dev);
if (debug > 1)
handled = 1;
if (intr_status & (IntrRxDone | IntrRxEmpty))
- netdev_rx(dev, ioaddr);
+ netdev_rx(dev, np, ioaddr);
/* Scavenge the skbuff list based on the Tx-done queue.
There are redundant checks here that may be cleaned up
#ifdef HAVE_NETDEV_POLL
-static int netdev_poll(struct net_device *dev, int *budget)
+static int netdev_poll(struct napi_struct *napi, int budget)
{
+ struct netdev_private *np = container_of(napi, struct netdev_private, napi);
+ struct net_device *dev = np->dev;
u32 intr_status;
- struct netdev_private *np = netdev_priv(dev);
void __iomem *ioaddr = np->base;
- int retcode = 0, quota = dev->quota;
+ int quota = budget;
do {
writel(IntrRxDone | IntrRxEmpty, ioaddr + IntrClear);
- retcode = __netdev_rx(dev, "a);
- *budget -= (dev->quota - quota);
- dev->quota = quota;
- if (retcode)
+ if (__netdev_rx(dev, "a))
goto out;
intr_status = readl(ioaddr + IntrStatus);
} while (intr_status & (IntrRxDone | IntrRxEmpty));
- netif_rx_complete(dev);
+ netif_rx_complete(dev, napi);
intr_status = readl(ioaddr + IntrEnable);
intr_status |= IntrRxDone | IntrRxEmpty;
writel(intr_status, ioaddr + IntrEnable);
out:
if (debug > 5)
- printk(KERN_DEBUG " exiting netdev_poll(): %d.\n", retcode);
+ printk(KERN_DEBUG " exiting netdev_poll(): %d.\n",
+ budget - quota);
/* Restart Rx engine if stopped. */
- return retcode;
+ return budget - quota;
}
#endif /* HAVE_NETDEV_POLL */
int i;
netif_stop_queue(dev);
+#ifdef HAVE_NETDEV_POLL
+ napi_disable(&np->napi);
+#endif
if (debug > 1) {
printk(KERN_DEBUG "%s: Shutting down ethercard, Intr status %#8.8x.\n",
*
* gem_change_mtu() and gem_set_multicast() are called with a read_lock()
* help by net/core/dev.c, thus they can't schedule. That means they can't
- * call netif_poll_disable() neither, thus force gem_poll() to keep a spinlock
+ * call napi_disable() neither, thus force gem_poll() to keep a spinlock
* where it could have been dropped. change_mtu especially would love also to
* be able to msleep instead of horrid locked delays when resetting the HW,
* but that read_lock() makes it impossible, unless I defer it's action to
return work_done;
}
-static int gem_poll(struct net_device *dev, int *budget)
+static int gem_poll(struct napi_struct *napi, int budget)
{
- struct gem *gp = dev->priv;
+ struct gem *gp = container_of(napi, struct gem, napi);
+ struct net_device *dev = gp->dev;
unsigned long flags;
+ int work_done;
/*
* NAPI locking nightmare: See comment at head of driver
*/
spin_lock_irqsave(&gp->lock, flags);
+ work_done = 0;
do {
- int work_to_do, work_done;
-
/* Handle anomalies */
if (gp->status & GREG_STAT_ABNORMAL) {
if (gem_abnormal_irq(dev, gp, gp->status))
/* Run RX thread. We don't use any locking here,
* code willing to do bad things - like cleaning the
- * rx ring - must call netif_poll_disable(), which
+ * rx ring - must call napi_disable(), which
* schedule_timeout()'s if polling is already disabled.
*/
- work_to_do = min(*budget, dev->quota);
-
- work_done = gem_rx(gp, work_to_do);
-
- *budget -= work_done;
- dev->quota -= work_done;
+ work_done += gem_rx(gp, budget);
- if (work_done >= work_to_do)
- return 1;
+ if (work_done >= budget)
+ return work_done;
spin_lock_irqsave(&gp->lock, flags);
gp->status = readl(gp->regs + GREG_STAT);
} while (gp->status & GREG_STAT_NAPI);
- __netif_rx_complete(dev);
+ __netif_rx_complete(dev, napi);
gem_enable_ints(gp);
spin_unlock_irqrestore(&gp->lock, flags);
- return 0;
+
+ return work_done;
}
static irqreturn_t gem_interrupt(int irq, void *dev_id)
spin_lock_irqsave(&gp->lock, flags);
- if (netif_rx_schedule_prep(dev)) {
+ if (netif_rx_schedule_prep(dev, &gp->napi)) {
u32 gem_status = readl(gp->regs + GREG_STAT);
if (gem_status == 0) {
- netif_poll_enable(dev);
+ napi_enable(&gp->napi);
spin_unlock_irqrestore(&gp->lock, flags);
return IRQ_NONE;
}
gp->status = gem_status;
gem_disable_ints(gp);
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &gp->napi);
}
spin_unlock_irqrestore(&gp->lock, flags);
mutex_lock(&gp->pm_mutex);
- netif_poll_disable(gp->dev);
+ napi_disable(&gp->napi);
spin_lock_irq(&gp->lock);
spin_lock(&gp->tx_lock);
spin_unlock(&gp->tx_lock);
spin_unlock_irq(&gp->lock);
- netif_poll_enable(gp->dev);
+ napi_enable(&gp->napi);
mutex_unlock(&gp->pm_mutex);
}
if (!gp->asleep)
rc = gem_do_start(dev);
gp->opened = (rc == 0);
+ if (gp->opened)
+ napi_enable(&gp->napi);
mutex_unlock(&gp->pm_mutex);
{
struct gem *gp = dev->priv;
- /* Note: we don't need to call netif_poll_disable() here because
- * our caller (dev_close) already did it for us
- */
+ napi_disable(&gp->napi);
mutex_lock(&gp->pm_mutex);
mutex_lock(&gp->pm_mutex);
- netif_poll_disable(dev);
+ napi_disable(&gp->napi);
printk(KERN_INFO "%s: suspending, WakeOnLan %s\n",
dev->name,
spin_unlock(&gp->tx_lock);
spin_unlock_irqrestore(&gp->lock, flags);
- netif_poll_enable(dev);
+ napi_enable(&gp->napi);
mutex_unlock(&gp->pm_mutex);
dev->get_stats = gem_get_stats;
dev->set_multicast_list = gem_set_multicast;
dev->do_ioctl = gem_ioctl;
- dev->poll = gem_poll;
- dev->weight = 64;
+ netif_napi_add(dev, &gp->napi, gem_poll, 64);
dev->ethtool_ops = &gem_ethtool_ops;
dev->tx_timeout = gem_tx_timeout;
dev->watchdog_timeo = 5 * HZ;
u32 msg_enable;
u32 status;
+ struct napi_struct napi;
struct net_device_stats net_stats;
int tx_fifo_sz;
struct tc35815_local {
struct pci_dev *pci_dev;
+ struct net_device *dev;
+ struct napi_struct napi;
+
/* statistics */
struct net_device_stats stats;
struct {
static irqreturn_t tc35815_interrupt(int irq, void *dev_id);
#ifdef TC35815_NAPI
static int tc35815_rx(struct net_device *dev, int limit);
-static int tc35815_poll(struct net_device *dev, int *budget);
+static int tc35815_poll(struct napi_struct *napi, int budget);
#else
static void tc35815_rx(struct net_device *dev);
#endif
SET_MODULE_OWNER(dev);
SET_NETDEV_DEV(dev, &pdev->dev);
lp = dev->priv;
+ lp->dev = dev;
/* enable device (incl. PCI PM wakeup), and bus-mastering */
rc = pci_enable_device (pdev);
dev->tx_timeout = tc35815_tx_timeout;
dev->watchdog_timeo = TC35815_TX_TIMEOUT;
#ifdef TC35815_NAPI
- dev->poll = tc35815_poll;
- dev->weight = NAPI_WEIGHT;
+ netif_napi_add(dev, &lp->napi, tc35815_poll, NAPI_WEIGHT);
#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = tc35815_poll_controller;
dev->irq = pdev->irq;
dev->base_addr = (unsigned long) ioaddr;
- /* dev->priv/lp zeroed and aligned in alloc_etherdev */
- lp = dev->priv;
spin_lock_init(&lp->lock);
lp->pci_dev = pdev;
lp->boardtype = ent->driver_data;
return -EAGAIN;
}
+#ifdef TC35815_NAPI
+ napi_enable(&lp->napi);
+#endif
+
/* Reset the hardware here. Don't forget to set the station address. */
spin_lock_irq(&lp->lock);
tc35815_chip_init(dev);
static irqreturn_t tc35815_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
+ struct tc35815_local *lp = netdev_priv(dev);
struct tc35815_regs __iomem *tr =
(struct tc35815_regs __iomem *)dev->base_addr;
#ifdef TC35815_NAPI
if (!(dmactl & DMA_IntMask)) {
/* disable interrupts */
tc_writel(dmactl | DMA_IntMask, &tr->DMA_Ctl);
- if (netif_rx_schedule_prep(dev))
- __netif_rx_schedule(dev);
+ if (netif_rx_schedule_prep(dev, &lp->napi))
+ __netif_rx_schedule(dev, &lp->napi);
else {
printk(KERN_ERR "%s: interrupt taken in poll\n",
dev->name);
}
#ifdef TC35815_NAPI
-static int
-tc35815_poll(struct net_device *dev, int *budget)
+static int tc35815_poll(struct napi_struct *napi, int budget)
{
- struct tc35815_local *lp = dev->priv;
+ struct tc35815_local *lp = container_of(napi, struct tc35815_local, napi);
+ struct net_device *dev = lp->dev;
struct tc35815_regs __iomem *tr =
(struct tc35815_regs __iomem *)dev->base_addr;
- int limit = min(*budget, dev->quota);
int received = 0, handled;
u32 status;
handled = tc35815_do_interrupt(dev, status, limit);
if (handled >= 0) {
received += handled;
- limit -= handled;
- if (limit <= 0)
+ if (received >= budget)
break;
}
status = tc_readl(&tr->Int_Src);
} while (status);
spin_unlock(&lp->lock);
- dev->quota -= received;
- *budget -= received;
- if (limit <= 0)
- return 1;
-
- netif_rx_complete(dev);
- /* enable interrupts */
- tc_writel(tc_readl(&tr->DMA_Ctl) & ~DMA_IntMask, &tr->DMA_Ctl);
- return 0;
+ if (received < budget) {
+ netif_rx_complete(dev, napi);
+ /* enable interrupts */
+ tc_writel(tc_readl(&tr->DMA_Ctl) & ~DMA_IntMask, &tr->DMA_Ctl);
+ }
+ return received;
}
#endif
tc35815_close(struct net_device *dev)
{
struct tc35815_local *lp = dev->priv;
+
netif_stop_queue(dev);
+#ifdef TC35815_NAPI
+ napi_disable(&lp->napi);
+#endif
/* Flush the Tx and disable Rx here. */
static inline void tg3_netif_stop(struct tg3 *tp)
{
tp->dev->trans_start = jiffies; /* prevent tx timeout */
- netif_poll_disable(tp->dev);
+ napi_disable(&tp->napi);
netif_tx_disable(tp->dev);
}
* so long as all callers are assured to have free tx slots
* (such as after tg3_init_hw)
*/
- netif_poll_enable(tp->dev);
+ napi_enable(&tp->napi);
tp->hw_status->status |= SD_STATUS_UPDATED;
tg3_enable_ints(tp);
}
return received;
}
-static int tg3_poll(struct net_device *netdev, int *budget)
+static int tg3_poll(struct napi_struct *napi, int budget)
{
- struct tg3 *tp = netdev_priv(netdev);
+ struct tg3 *tp = container_of(napi, struct tg3, napi);
+ struct net_device *netdev = tp->dev;
struct tg3_hw_status *sblk = tp->hw_status;
- int done;
+ int work_done = 0;
/* handle link change and other phy events */
if (!(tp->tg3_flags &
if (sblk->idx[0].tx_consumer != tp->tx_cons) {
tg3_tx(tp);
if (unlikely(tp->tg3_flags & TG3_FLAG_TX_RECOVERY_PENDING)) {
- netif_rx_complete(netdev);
+ netif_rx_complete(netdev, napi);
schedule_work(&tp->reset_task);
return 0;
}
/* run RX thread, within the bounds set by NAPI.
* All RX "locking" is done by ensuring outside
- * code synchronizes with dev->poll()
+ * code synchronizes with tg3->napi.poll()
*/
- if (sblk->idx[0].rx_producer != tp->rx_rcb_ptr) {
- int orig_budget = *budget;
- int work_done;
-
- if (orig_budget > netdev->quota)
- orig_budget = netdev->quota;
-
- work_done = tg3_rx(tp, orig_budget);
-
- *budget -= work_done;
- netdev->quota -= work_done;
- }
+ if (sblk->idx[0].rx_producer != tp->rx_rcb_ptr)
+ work_done = tg3_rx(tp, budget);
if (tp->tg3_flags & TG3_FLAG_TAGGED_STATUS) {
tp->last_tag = sblk->status_tag;
sblk->status &= ~SD_STATUS_UPDATED;
/* if no more work, tell net stack and NIC we're done */
- done = !tg3_has_work(tp);
- if (done) {
- netif_rx_complete(netdev);
+ if (!tg3_has_work(tp)) {
+ netif_rx_complete(netdev, napi);
tg3_restart_ints(tp);
}
- return (done ? 0 : 1);
+ return work_done;
}
static void tg3_irq_quiesce(struct tg3 *tp)
prefetch(&tp->rx_rcb[tp->rx_rcb_ptr]);
if (likely(!tg3_irq_sync(tp)))
- netif_rx_schedule(dev); /* schedule NAPI poll */
+ netif_rx_schedule(dev, &tp->napi);
return IRQ_HANDLED;
}
*/
tw32_mailbox(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW, 0x00000001);
if (likely(!tg3_irq_sync(tp)))
- netif_rx_schedule(dev); /* schedule NAPI poll */
+ netif_rx_schedule(dev, &tp->napi);
return IRQ_RETVAL(1);
}
sblk->status &= ~SD_STATUS_UPDATED;
if (likely(tg3_has_work(tp))) {
prefetch(&tp->rx_rcb[tp->rx_rcb_ptr]);
- netif_rx_schedule(dev); /* schedule NAPI poll */
+ netif_rx_schedule(dev, &tp->napi);
} else {
/* No work, shared interrupt perhaps? re-enable
* interrupts, and flush that PCI write
tw32_mailbox_f(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW, 0x00000001);
if (tg3_irq_sync(tp))
goto out;
- if (netif_rx_schedule_prep(dev)) {
+ if (netif_rx_schedule_prep(dev, &tp->napi)) {
prefetch(&tp->rx_rcb[tp->rx_rcb_ptr]);
/* Update last_tag to mark that this status has been
* seen. Because interrupt may be shared, we may be
* if tg3_poll() is not scheduled.
*/
tp->last_tag = sblk->status_tag;
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &tp->napi);
}
out:
return IRQ_RETVAL(handled);
tg3_full_unlock(tp);
del_timer_sync(&tp->timer);
tp->irq_sync = 0;
- netif_poll_enable(tp->dev);
+ napi_enable(&tp->napi);
dev_close(tp->dev);
tg3_full_lock(tp, 0);
}
len = skb_headlen(skb);
/* We are running in BH disabled context with netif_tx_lock
- * and TX reclaim runs via tp->poll inside of a software
+ * and TX reclaim runs via tp->napi.poll inside of a software
* interrupt. Furthermore, IRQ processing runs lockless so we have
* no IRQ context deadlocks to worry about either. Rejoice!
*/
len = skb_headlen(skb);
/* We are running in BH disabled context with netif_tx_lock
- * and TX reclaim runs via tp->poll inside of a software
+ * and TX reclaim runs via tp->napi.poll inside of a software
* interrupt. Furthermore, IRQ processing runs lockless so we have
* no IRQ context deadlocks to worry about either. Rejoice!
*/
return err;
}
+ napi_enable(&tp->napi);
+
tg3_full_lock(tp, 0);
err = tg3_init_hw(tp, 1);
tg3_full_unlock(tp);
if (err) {
+ napi_disable(&tp->napi);
free_irq(tp->pdev->irq, dev);
if (tp->tg3_flags2 & TG3_FLG2_USING_MSI) {
pci_disable_msi(tp->pdev);
tg3_full_unlock(tp);
+ napi_disable(&tp->napi);
+
return err;
}
{
struct tg3 *tp = netdev_priv(dev);
+ napi_disable(&tp->napi);
cancel_work_sync(&tp->reset_task);
netif_stop_queue(dev);
dev->set_mac_address = tg3_set_mac_addr;
dev->do_ioctl = tg3_ioctl;
dev->tx_timeout = tg3_tx_timeout;
- dev->poll = tg3_poll;
+ netif_napi_add(dev, &tp->napi, tg3_poll, 64);
dev->ethtool_ops = &tg3_ethtool_ops;
- dev->weight = 64;
dev->watchdog_timeo = TG3_TX_TIMEOUT;
dev->change_mtu = tg3_change_mtu;
dev->irq = pdev->irq;
dma_addr_t tx_desc_mapping;
/* begin "rx thread" cacheline section */
+ struct napi_struct napi;
void (*write32_rx_mbox) (struct tg3 *, u32,
u32);
u32 rx_rcb_ptr;
void __iomem *regs; /* Base of normal regs */
void __iomem *phyregs; /* Base of register bank used for PHY access */
+ struct net_device *dev;
+ struct napi_struct napi;
+
unsigned int phy; /* Index of PHY for this interface */
unsigned int irq_num;
unsigned int id;
return done;
}
-static int tsi108_poll(struct net_device *dev, int *budget)
+static int tsi108_poll(struct napi_struct *napi, int budget)
{
- struct tsi108_prv_data *data = netdev_priv(dev);
+ struct tsi108_prv_data *data = container_of(napi, struct tsi108_prv_data, napi);
+ struct net_device *dev = data->dev;
u32 estat = TSI_READ(TSI108_EC_RXESTAT);
u32 intstat = TSI_READ(TSI108_EC_INTSTAT);
- int total_budget = min(*budget, dev->quota);
- int num_received = 0, num_filled = 0, budget_used;
+ int num_received = 0, num_filled = 0;
intstat &= TSI108_INT_RXQUEUE0 | TSI108_INT_RXTHRESH |
TSI108_INT_RXOVERRUN | TSI108_INT_RXERROR | TSI108_INT_RXWAIT;
TSI_WRITE(TSI108_EC_INTSTAT, intstat);
if (data->rxpending || (estat & TSI108_EC_RXESTAT_Q0_DESCINT))
- num_received = tsi108_complete_rx(dev, total_budget);
+ num_received = tsi108_complete_rx(dev, budget);
/* This should normally fill no more slots than the number of
* packets received in tsi108_complete_rx(). The exception
*/
if (data->rxfree < TSI108_RXRING_LEN)
- num_filled = tsi108_refill_rx(dev, total_budget * 2);
+ num_filled = tsi108_refill_rx(dev, budget * 2);
if (intstat & TSI108_INT_RXERROR) {
u32 err = TSI_READ(TSI108_EC_RXERR);
spin_unlock_irq(&data->misclock);
}
- budget_used = max(num_received, num_filled / 2);
-
- *budget -= budget_used;
- dev->quota -= budget_used;
-
- if (budget_used != total_budget) {
+ if (num_received < budget) {
data->rxpending = 0;
- netif_rx_complete(dev);
+ netif_rx_complete(dev, napi);
TSI_WRITE(TSI108_EC_INTMASK,
TSI_READ(TSI108_EC_INTMASK)
TSI108_INT_RXOVERRUN |
TSI108_INT_RXERROR |
TSI108_INT_RXWAIT));
-
- /* IRQs are level-triggered, so no need to re-check */
- return 0;
} else {
data->rxpending = 1;
}
- return 1;
+ return num_received;
}
static void tsi108_rx_int(struct net_device *dev)
* from tsi108_check_rxring().
*/
- if (netif_rx_schedule_prep(dev)) {
+ if (netif_rx_schedule_prep(dev, &data->napi)) {
/* Mask, rather than ack, the receive interrupts. The ack
* will happen in tsi108_poll().
*/
| TSI108_INT_RXTHRESH |
TSI108_INT_RXOVERRUN | TSI108_INT_RXERROR |
TSI108_INT_RXWAIT);
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &data->napi);
} else {
if (!netif_running(dev)) {
/* This can happen if an interrupt occurs while the
TSI_WRITE(TSI108_EC_TXQ_PTRLOW, data->txdma);
tsi108_init_phy(dev);
+ napi_enable(&data->napi);
+
setup_timer(&data->timer, tsi108_timed_checker, (unsigned long)dev);
mod_timer(&data->timer, jiffies + 1);
struct tsi108_prv_data *data = netdev_priv(dev);
netif_stop_queue(dev);
+ napi_disable(&data->napi);
del_timer_sync(&data->timer);
printk("tsi108_eth%d: probe...\n", pdev->id);
data = netdev_priv(dev);
+ data->dev = dev;
pr_debug("tsi108_eth%d:regs:phyresgs:phy:irq_num=0x%x:0x%x:0x%x:0x%x\n",
pdev->id, einfo->regs, einfo->phyregs,
dev->set_mac_address = tsi108_set_mac;
dev->set_multicast_list = tsi108_set_rx_mode;
dev->get_stats = tsi108_get_stats;
- dev->poll = tsi108_poll;
+ netif_napi_add(dev, &data->napi, tsi108_poll, 64);
dev->do_ioctl = tsi108_do_ioctl;
- dev->weight = 64; /* 64 is more suitable for GigE interface - klai */
/* Apparently, the Linux networking code won't use scatter-gather
* if the hardware doesn't do checksums. However, it's faster
void oom_timer(unsigned long data)
{
struct net_device *dev = (struct net_device *)data;
- netif_rx_schedule(dev);
+ struct tulip_private *tp = netdev_priv(dev);
+ netif_rx_schedule(dev, &tp->napi);
}
-int tulip_poll(struct net_device *dev, int *budget)
+int tulip_poll(struct napi_struct *napi, int budget)
{
- struct tulip_private *tp = netdev_priv(dev);
+ struct tulip_private *tp = container_of(napi, struct tulip_private, napi);
+ struct net_device *dev = tp->dev;
int entry = tp->cur_rx % RX_RING_SIZE;
- int rx_work_limit = *budget;
+ int work_done = 0;
+#ifdef CONFIG_TULIP_NAPI_HW_MITIGATION
int received = 0;
+#endif
if (!netif_running(dev))
goto done;
- if (rx_work_limit > dev->quota)
- rx_work_limit = dev->quota;
-
#ifdef CONFIG_TULIP_NAPI_HW_MITIGATION
/* that one buffer is needed for mit activation; or might be a
bug in the ring buffer code; check later -- JHS*/
- if (rx_work_limit >=RX_RING_SIZE) rx_work_limit--;
+ if (budget >=RX_RING_SIZE) budget--;
#endif
if (tulip_debug > 4)
while ( ! (tp->rx_ring[entry].status & cpu_to_le32(DescOwned))) {
s32 status = le32_to_cpu(tp->rx_ring[entry].status);
-
if (tp->dirty_rx + RX_RING_SIZE == tp->cur_rx)
break;
if (tulip_debug > 5)
printk(KERN_DEBUG "%s: In tulip_rx(), entry %d %8.8x.\n",
dev->name, entry, status);
- if (--rx_work_limit < 0)
+ if (work_done++ >= budget)
goto not_done;
if ((status & 0x38008300) != 0x0300) {
tp->stats.rx_packets++;
tp->stats.rx_bytes += pkt_len;
}
- received++;
+#ifdef CONFIG_TULIP_NAPI_HW_MITIGATION
+ received++;
+#endif
entry = (++tp->cur_rx) % RX_RING_SIZE;
if (tp->cur_rx - tp->dirty_rx > RX_RING_SIZE/4)
#endif /* CONFIG_TULIP_NAPI_HW_MITIGATION */
- dev->quota -= received;
- *budget -= received;
-
tulip_refill_rx(dev);
/* If RX ring is not full we are out of memory. */
- if (tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb == NULL) goto oom;
+ if (tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb == NULL)
+ goto oom;
/* Remove us from polling list and enable RX intr. */
- netif_rx_complete(dev);
+ netif_rx_complete(dev, napi);
iowrite32(tulip_tbl[tp->chip_id].valid_intrs, tp->base_addr+CSR7);
/* The last op happens after poll completion. Which means the following:
* processed irqs. But it must not result in losing events.
*/
- return 0;
+ return work_done;
not_done:
- if (!received) {
-
- received = dev->quota; /* Not to happen */
- }
- dev->quota -= received;
- *budget -= received;
-
if (tp->cur_rx - tp->dirty_rx > RX_RING_SIZE/2 ||
tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb == NULL)
tulip_refill_rx(dev);
- if (tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb == NULL) goto oom;
-
- return 1;
+ if (tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb == NULL)
+ goto oom;
+ return work_done;
oom: /* Executed with RX ints disabled */
-
/* Start timer, stop polling, but do not enable rx interrupts. */
mod_timer(&tp->oom_timer, jiffies+1);
* before we did netif_rx_complete(). See? We would lose it. */
/* remove ourselves from the polling list */
- netif_rx_complete(dev);
+ netif_rx_complete(dev, napi);
- return 0;
+ return work_done;
}
#else /* CONFIG_TULIP_NAPI */
rxd++;
/* Mask RX intrs and add the device to poll list. */
iowrite32(tulip_tbl[tp->chip_id].valid_intrs&~RxPollInt, ioaddr + CSR7);
- netif_rx_schedule(dev);
+ netif_rx_schedule(dev, &tp->napi);
if (!(csr5&~(AbnormalIntr|NormalIntr|RxPollInt|TPLnkPass)))
break;
int chip_id;
int revision;
int flags;
+ struct napi_struct napi;
struct net_device_stats stats;
struct timer_list timer; /* Media selection timer. */
struct timer_list oom_timer; /* Out of memory timer. */
irqreturn_t tulip_interrupt(int irq, void *dev_instance);
int tulip_refill_rx(struct net_device *dev);
#ifdef CONFIG_TULIP_NAPI
-int tulip_poll(struct net_device *dev, int *budget);
+int tulip_poll(struct napi_struct *napi, int budget);
#endif
int next_tick = 3*HZ;
int i;
+#ifdef CONFIG_TULIP_NAPI
+ napi_enable(&tp->napi);
+#endif
+
/* Wake the chip from sleep/snooze mode. */
tulip_set_power_state (tp, 0, 0);
flush_scheduled_work();
+#ifdef CONFIG_TULIP_NAPI
+ napi_disable(&tp->napi);
+#endif
+
del_timer_sync (&tp->timer);
#ifdef CONFIG_TULIP_NAPI
del_timer_sync (&tp->oom_timer);
dev->tx_timeout = tulip_tx_timeout;
dev->watchdog_timeo = TX_TIMEOUT;
#ifdef CONFIG_TULIP_NAPI
- dev->poll = tulip_poll;
- dev->weight = 16;
+ netif_napi_add(dev, &tp->napi, tulip_poll, 16);
#endif
dev->stop = tulip_close;
dev->get_stats = tulip_get_stats;
struct basic_ring rxLoRing;
struct pci_dev * pdev;
struct net_device * dev;
+ struct napi_struct napi;
spinlock_t state_lock;
struct vlan_group * vlgrp;
struct basic_ring rxHiRing;
}
static int
-typhoon_poll(struct net_device *dev, int *total_budget)
+typhoon_poll(struct napi_struct *napi, int budget)
{
- struct typhoon *tp = netdev_priv(dev);
+ struct typhoon *tp = container_of(napi, struct typhoon, napi);
+ struct net_device *dev = tp->dev;
struct typhoon_indexes *indexes = tp->indexes;
- int orig_budget = *total_budget;
- int budget, work_done, done;
+ int work_done;
rmb();
if(!tp->awaiting_resp && indexes->respReady != indexes->respCleared)
if(le32_to_cpu(indexes->txLoCleared) != tp->txLoRing.lastRead)
typhoon_tx_complete(tp, &tp->txLoRing, &indexes->txLoCleared);
- if(orig_budget > dev->quota)
- orig_budget = dev->quota;
-
- budget = orig_budget;
work_done = 0;
- done = 1;
if(indexes->rxHiCleared != indexes->rxHiReady) {
- work_done = typhoon_rx(tp, &tp->rxHiRing, &indexes->rxHiReady,
+ work_done += typhoon_rx(tp, &tp->rxHiRing, &indexes->rxHiReady,
&indexes->rxHiCleared, budget);
- budget -= work_done;
}
if(indexes->rxLoCleared != indexes->rxLoReady) {
work_done += typhoon_rx(tp, &tp->rxLoRing, &indexes->rxLoReady,
- &indexes->rxLoCleared, budget);
- }
-
- if(work_done) {
- *total_budget -= work_done;
- dev->quota -= work_done;
-
- if(work_done >= orig_budget)
- done = 0;
+ &indexes->rxLoCleared, budget - work_done);
}
if(le32_to_cpu(indexes->rxBuffCleared) == tp->rxBuffRing.lastWrite) {
typhoon_fill_free_ring(tp);
}
- if(done) {
- netif_rx_complete(dev);
+ if (work_done < budget) {
+ netif_rx_complete(dev, napi);
iowrite32(TYPHOON_INTR_NONE,
tp->ioaddr + TYPHOON_REG_INTR_MASK);
typhoon_post_pci_writes(tp->ioaddr);
}
- return (done ? 0 : 1);
+ return work_done;
}
static irqreturn_t
iowrite32(intr_status, ioaddr + TYPHOON_REG_INTR_STATUS);
- if(netif_rx_schedule_prep(dev)) {
+ if (netif_rx_schedule_prep(dev, &tp->napi)) {
iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_MASK);
typhoon_post_pci_writes(ioaddr);
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &tp->napi);
} else {
printk(KERN_ERR "%s: Error, poll already scheduled\n",
dev->name);
if(err < 0)
goto out_sleep;
+ napi_enable(&tp->napi);
+
err = typhoon_start_runtime(tp);
- if(err < 0)
+ if(err < 0) {
+ napi_disable(&tp->napi);
goto out_irq;
+ }
netif_start_queue(dev);
return 0;
struct typhoon *tp = netdev_priv(dev);
netif_stop_queue(dev);
+ napi_disable(&tp->napi);
if(typhoon_stop_runtime(tp, WaitSleep) < 0)
printk(KERN_ERR "%s: unable to stop runtime\n", dev->name);
dev->stop = typhoon_close;
dev->set_multicast_list = typhoon_set_rx_mode;
dev->tx_timeout = typhoon_tx_timeout;
- dev->poll = typhoon_poll;
- dev->weight = 16;
+ netif_napi_add(dev, &tp->napi, typhoon_poll, 16);
dev->watchdog_timeo = TX_TIMEOUT;
dev->get_stats = typhoon_get_stats;
dev->set_mac_address = typhoon_set_mac_address;
}
#ifdef CONFIG_UGETH_NAPI
-static int ucc_geth_poll(struct net_device *dev, int *budget)
+static int ucc_geth_poll(struct napi_struct *napi, int budget)
{
- struct ucc_geth_private *ugeth = netdev_priv(dev);
+ struct ucc_geth_private *ugeth = container_of(napi, struct ucc_geth_private, napi);
+ struct net_device *dev = ugeth->dev;
struct ucc_geth_info *ug_info;
- struct ucc_fast_private *uccf;
- int howmany;
- u8 i;
- int rx_work_limit;
- register u32 uccm;
+ int howmany, i;
ug_info = ugeth->ug_info;
- rx_work_limit = *budget;
- if (rx_work_limit > dev->quota)
- rx_work_limit = dev->quota;
-
howmany = 0;
+ for (i = 0; i < ug_info->numQueuesRx; i++)
+ howmany += ucc_geth_rx(ugeth, i, budget - howmany);
- for (i = 0; i < ug_info->numQueuesRx; i++) {
- howmany += ucc_geth_rx(ugeth, i, rx_work_limit);
- }
-
- dev->quota -= howmany;
- rx_work_limit -= howmany;
- *budget -= howmany;
+ if (howmany < budget) {
+ struct ucc_fast_private *uccf;
+ u32 uccm;
- if (rx_work_limit > 0) {
- netif_rx_complete(dev);
+ netif_rx_complete(dev, napi);
uccf = ugeth->uccf;
uccm = in_be32(uccf->p_uccm);
uccm |= UCCE_RX_EVENTS;
out_be32(uccf->p_uccm, uccm);
}
- return (rx_work_limit > 0) ? 0 : 1;
+ return howmany;
}
#endif /* CONFIG_UGETH_NAPI */
/* check for receive events that require processing */
if (ucce & UCCE_RX_EVENTS) {
#ifdef CONFIG_UGETH_NAPI
- if (netif_rx_schedule_prep(dev)) {
- uccm &= ~UCCE_RX_EVENTS;
+ if (netif_rx_schedule_prep(dev, &ugeth->napi)) {
+ uccm &= ~UCCE_RX_EVENTS;
out_be32(uccf->p_uccm, uccm);
- __netif_rx_schedule(dev);
+ __netif_rx_schedule(dev, &ugeth->napi);
}
#else
rx_mask = UCCE_RXBF_SINGLE_MASK;
return err;
}
+#ifdef CONFIG_UGETH_NAPI
+ napi_enable(&ugeth->napi);
+#endif
err = ucc_geth_startup(ugeth);
if (err) {
if (netif_msg_ifup(ugeth))
ugeth_err("%s: Cannot configure net device, aborting.",
dev->name);
- return err;
+ goto out_err;
}
err = adjust_enet_interface(ugeth);
if (netif_msg_ifup(ugeth))
ugeth_err("%s: Cannot configure net device, aborting.",
dev->name);
- return err;
+ goto out_err;
}
/* Set MACSTNADDR1, MACSTNADDR2 */
if (err) {
if (netif_msg_ifup(ugeth))
ugeth_err("%s: Cannot initialize PHY, aborting.", dev->name);
- return err;
+ goto out_err;
}
phy_start(ugeth->phydev);
ugeth_err("%s: Cannot get IRQ for net device, aborting.",
dev->name);
ucc_geth_stop(ugeth);
- return err;
+ goto out_err;
}
err = ugeth_enable(ugeth, COMM_DIR_RX_AND_TX);
if (netif_msg_ifup(ugeth))
ugeth_err("%s: Cannot enable net device, aborting.", dev->name);
ucc_geth_stop(ugeth);
- return err;
+ goto out_err;
}
netif_start_queue(dev);
return err;
+
+out_err:
+#ifdef CONFIG_UGETH_NAPI
+ napi_disable(&ugeth->napi);
+#endif
+ return err;
}
/* Stops the kernel queue, and halts the controller */
ugeth_vdbg("%s: IN", __FUNCTION__);
+#ifdef CONFIG_UGETH_NAPI
+ napi_disable(&ugeth->napi);
+#endif
+
ucc_geth_stop(ugeth);
phy_disconnect(ugeth->phydev);
dev->tx_timeout = ucc_geth_timeout;
dev->watchdog_timeo = TX_TIMEOUT;
#ifdef CONFIG_UGETH_NAPI
- dev->poll = ucc_geth_poll;
- dev->weight = UCC_GETH_DEV_WEIGHT;
+ netif_napi_add(dev, &ugeth->napi, ucc_geth_poll, UCC_GETH_DEV_WEIGHT);
#endif /* CONFIG_UGETH_NAPI */
dev->stop = ucc_geth_close;
dev->get_stats = ucc_geth_get_stats;
struct ucc_geth_info *ug_info;
struct ucc_fast_private *uccf;
struct net_device *dev;
+ struct napi_struct napi;
struct net_device_stats stats; /* linux network statistics */
struct ucc_geth *ug_regs;
struct ucc_geth_init_pram *p_init_enet_param_shadow;
struct pci_dev *pdev;
long pioaddr;
+ struct net_device *dev;
+ struct napi_struct napi;
struct net_device_stats stats;
spinlock_t lock;
#endif
#ifdef CONFIG_VIA_RHINE_NAPI
-static int rhine_napipoll(struct net_device *dev, int *budget)
+static int rhine_napipoll(struct napi_struct *napi, int budget)
{
- struct rhine_private *rp = netdev_priv(dev);
+ struct rhine_private *rp = container_of(napi, struct rhine_private, napi);
+ struct net_device *dev = rp->dev;
void __iomem *ioaddr = rp->base;
- int done, limit = min(dev->quota, *budget);
+ int work_done;
- done = rhine_rx(dev, limit);
- *budget -= done;
- dev->quota -= done;
+ work_done = rhine_rx(dev, budget);
- if (done < limit) {
- netif_rx_complete(dev);
+ if (work_done < budget) {
+ netif_rx_complete(dev, napi);
iowrite16(IntrRxDone | IntrRxErr | IntrRxEmpty| IntrRxOverflow |
IntrRxDropped | IntrRxNoBuf | IntrTxAborted |
IntrTxDone | IntrTxError | IntrTxUnderrun |
IntrPCIErr | IntrStatsMax | IntrLinkChange,
ioaddr + IntrEnable);
- return 0;
}
- else
- return 1;
+ return work_done;
}
#endif
SET_NETDEV_DEV(dev, &pdev->dev);
rp = netdev_priv(dev);
+ rp->dev = dev;
rp->quirks = quirks;
rp->pioaddr = pioaddr;
rp->pdev = pdev;
dev->poll_controller = rhine_poll;
#endif
#ifdef CONFIG_VIA_RHINE_NAPI
- dev->poll = rhine_napipoll;
- dev->weight = 64;
+ netif_napi_add(dev, &rp->napi, rhine_napipoll, 64);
#endif
if (rp->quirks & rqRhineI)
dev->features |= NETIF_F_SG|NETIF_F_HW_CSUM;
rhine_set_rx_mode(dev);
- netif_poll_enable(dev);
+#ifdef CONFIG_VIA_RHINE_NAPI
+ napi_enable(&rp->napi);
+#endif
/* Enable interrupts by setting the interrupt mask. */
iowrite16(IntrRxDone | IntrRxErr | IntrRxEmpty| IntrRxOverflow |
/* protect against concurrent rx interrupts */
disable_irq(rp->pdev->irq);
+#ifdef CONFIG_VIA_RHINE_NAPI
+ napi_disable(&rp->napi);
+#endif
+
spin_lock(&rp->lock);
/* clear all descriptors */
IntrPCIErr | IntrStatsMax | IntrLinkChange,
ioaddr + IntrEnable);
- netif_rx_schedule(dev);
+ netif_rx_schedule(dev, &rp->napi);
#else
rhine_rx(dev, RX_RING_SIZE);
#endif
spin_lock_irq(&rp->lock);
netif_stop_queue(dev);
- netif_poll_disable(dev);
+#ifdef CONFIG_VIA_RHINE_NAPI
+ napi_disable(&rp->napi);
+#endif
if (debug > 1)
printk(KERN_DEBUG "%s: Shutting down ethercard, "
if (!netif_running(dev))
return 0;
+#ifdef CONFIG_VIA_RHINE_NAPI
+ napi_disable(&rp->napi);
+#endif
netif_device_detach(dev);
pci_save_state(pdev);
struct list_head list;
struct net_device *netdev;
+ struct napi_struct napi;
struct net_device_stats stats;
struct xen_netif_tx_front_ring tx;
static void rx_refill_timeout(unsigned long data)
{
struct net_device *dev = (struct net_device *)data;
- netif_rx_schedule(dev);
+ struct netfront_info *np = netdev_priv(dev);
+ netif_rx_schedule(dev, &np->napi);
}
static int netfront_tx_slot_available(struct netfront_info *np)
memset(&np->stats, 0, sizeof(np->stats));
+ napi_enable(&np->napi);
+
spin_lock_bh(&np->rx_lock);
if (netif_carrier_ok(dev)) {
xennet_alloc_rx_buffers(dev);
np->rx.sring->rsp_event = np->rx.rsp_cons + 1;
if (RING_HAS_UNCONSUMED_RESPONSES(&np->rx))
- netif_rx_schedule(dev);
+ netif_rx_schedule(dev, &np->napi);
}
spin_unlock_bh(&np->rx_lock);
{
struct netfront_info *np = netdev_priv(dev);
netif_stop_queue(np->netdev);
+ napi_disable(&np->napi);
return 0;
}
return packets_dropped;
}
-static int xennet_poll(struct net_device *dev, int *pbudget)
+static int xennet_poll(struct napi_struct *napi, int budget)
{
- struct netfront_info *np = netdev_priv(dev);
+ struct netfront_info *np = container_of(napi, struct netfront_info, napi);
+ struct net_device *dev = np->netdev;
struct sk_buff *skb;
struct netfront_rx_info rinfo;
struct xen_netif_rx_response *rx = &rinfo.rx;
struct xen_netif_extra_info *extras = rinfo.extras;
RING_IDX i, rp;
- int work_done, budget, more_to_do = 1;
+ int work_done;
struct sk_buff_head rxq;
struct sk_buff_head errq;
struct sk_buff_head tmpq;
skb_queue_head_init(&errq);
skb_queue_head_init(&tmpq);
- budget = *pbudget;
- if (budget > dev->quota)
- budget = dev->quota;
rp = np->rx.sring->rsp_prod;
rmb(); /* Ensure we see queued responses up to 'rp'. */
xennet_alloc_rx_buffers(dev);
- *pbudget -= work_done;
- dev->quota -= work_done;
-
if (work_done < budget) {
+ int more_to_do = 0;
+
local_irq_save(flags);
RING_FINAL_CHECK_FOR_RESPONSES(&np->rx, more_to_do);
if (!more_to_do)
- __netif_rx_complete(dev);
+ __netif_rx_complete(dev, napi);
local_irq_restore(flags);
}
spin_unlock(&np->rx_lock);
- return more_to_do;
+ return work_done;
}
static int xennet_change_mtu(struct net_device *dev, int mtu)
netdev->hard_start_xmit = xennet_start_xmit;
netdev->stop = xennet_close;
netdev->get_stats = xennet_get_stats;
- netdev->poll = xennet_poll;
+ netif_napi_add(netdev, &np->napi, xennet_poll, 64);
netdev->uninit = xennet_uninit;
netdev->change_mtu = xennet_change_mtu;
- netdev->weight = 64;
netdev->features = NETIF_F_IP_CSUM;
SET_ETHTOOL_OPS(netdev, &xennet_ethtool_ops);
xennet_tx_buf_gc(dev);
/* Under tx_lock: protects access to rx shared-ring indexes. */
if (RING_HAS_UNCONSUMED_RESPONSES(&np->rx))
- netif_rx_schedule(dev);
+ netif_rx_schedule(dev, &np->napi);
}
spin_unlock_irqrestore(&np->tx_lock, flags);
#ifdef __KERNEL__
#include <linux/timer.h>
+#include <linux/delay.h>
#include <asm/atomic.h>
#include <asm/cache.h>
#include <asm/byteorder.h>
#include <linux/device.h>
#include <linux/percpu.h>
#include <linux/dmaengine.h>
+#include <linux/workqueue.h>
struct vlan_group;
struct ethtool_ops;
__LINK_STATE_PRESENT,
__LINK_STATE_SCHED,
__LINK_STATE_NOCARRIER,
- __LINK_STATE_RX_SCHED,
__LINK_STATE_LINKWATCH_PENDING,
__LINK_STATE_DORMANT,
__LINK_STATE_QDISC_RUNNING,
extern int __init netdev_boot_setup(char *str);
+/*
+ * Structure for NAPI scheduling similar to tasklet but with weighting
+ */
+struct napi_struct {
+ /* The poll_list must only be managed by the entity which
+ * changes the state of the NAPI_STATE_SCHED bit. This means
+ * whoever atomically sets that bit can add this napi_struct
+ * to the per-cpu poll_list, and whoever clears that bit
+ * can remove from the list right before clearing the bit.
+ */
+ struct list_head poll_list;
+
+ unsigned long state;
+ int weight;
+ int (*poll)(struct napi_struct *, int);
+#ifdef CONFIG_NETPOLL
+ spinlock_t poll_lock;
+ int poll_owner;
+ struct net_device *dev;
+ struct list_head dev_list;
+#endif
+};
+
+enum
+{
+ NAPI_STATE_SCHED, /* Poll is scheduled */
+};
+
+extern void FASTCALL(__napi_schedule(struct napi_struct *n));
+
+/**
+ * napi_schedule_prep - check if napi can be scheduled
+ * @n: napi context
+ *
+ * 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
+ */
+static inline int napi_schedule_prep(struct napi_struct *n)
+{
+ return !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
+}
+
+/**
+ * napi_schedule - schedule NAPI poll
+ * @n: napi context
+ *
+ * Schedule NAPI poll routine to be called if it is not already
+ * running.
+ */
+static inline void napi_schedule(struct napi_struct *n)
+{
+ if (napi_schedule_prep(n))
+ __napi_schedule(n);
+}
+
+/**
+ * napi_complete - NAPI processing complete
+ * @n: napi context
+ *
+ * Mark NAPI processing as complete.
+ */
+static inline void __napi_complete(struct napi_struct *n)
+{
+ BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
+ list_del(&n->poll_list);
+ smp_mb__before_clear_bit();
+ clear_bit(NAPI_STATE_SCHED, &n->state);
+}
+
+static inline void napi_complete(struct napi_struct *n)
+{
+ local_irq_disable();
+ __napi_complete(n);
+ local_irq_enable();
+}
+
+/**
+ * napi_disable - prevent NAPI from scheduling
+ * @n: napi context
+ *
+ * Stop NAPI from being scheduled on this context.
+ * Waits till any outstanding processing completes.
+ */
+static inline void napi_disable(struct napi_struct *n)
+{
+ while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
+ msleep_interruptible(1);
+}
+
+/**
+ * napi_enable - enable NAPI scheduling
+ * @n: napi context
+ *
+ * Resume NAPI from being scheduled on this context.
+ * Must be paired with napi_disable.
+ */
+static inline void napi_enable(struct napi_struct *n)
+{
+ BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
+ smp_mb__before_clear_bit();
+ clear_bit(NAPI_STATE_SCHED, &n->state);
+}
+
/*
* The DEVICE structure.
* Actually, this whole structure is a big mistake. It mixes I/O
unsigned long state;
struct list_head dev_list;
+#ifdef CONFIG_NETPOLL
+ struct list_head napi_list;
+#endif
/* The device initialization function. Called only once. */
int (*init)(struct net_device *dev);
/*
* Cache line mostly used on receive path (including eth_type_trans())
*/
- struct list_head poll_list ____cacheline_aligned_in_smp;
- /* Link to poll list */
-
- int (*poll) (struct net_device *dev, int *quota);
- int quota;
- int weight;
unsigned long last_rx; /* Time of last Rx */
/* Interface address info used in eth_type_trans() */
unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
#define NETDEV_ALIGN 32
#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
+/**
+ * netdev_priv - access network device private data
+ * @dev: network device
+ *
+ * Get network device private data
+ */
static inline void *netdev_priv(const struct net_device *dev)
{
return dev->priv;
*/
#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
+static inline void netif_napi_add(struct net_device *dev,
+ struct napi_struct *napi,
+ int (*poll)(struct napi_struct *, int),
+ int weight)
+{
+ INIT_LIST_HEAD(&napi->poll_list);
+ napi->poll = poll;
+ napi->weight = weight;
+#ifdef CONFIG_NETPOLL
+ napi->dev = dev;
+ list_add(&napi->dev_list, &dev->napi_list);
+ spin_lock_init(&napi->poll_lock);
+ napi->poll_owner = -1;
+#endif
+ set_bit(NAPI_STATE_SCHED, &napi->state);
+}
+
struct packet_type {
__be16 type; /* This is really htons(ether_type). */
struct net_device *dev; /* NULL is wildcarded here */
* Incoming packets are placed on per-cpu queues so that
* no locking is needed.
*/
-
struct softnet_data
{
struct net_device *output_queue;
struct list_head poll_list;
struct sk_buff *completion_queue;
- struct net_device backlog_dev; /* Sorry. 8) */
+ struct napi_struct backlog;
#ifdef CONFIG_NET_DMA
struct dma_chan *net_dma;
#endif
__netif_schedule(dev);
}
+/**
+ * netif_start_queue - allow transmit
+ * @dev: network device
+ *
+ * Allow upper layers to call the device hard_start_xmit routine.
+ */
static inline void netif_start_queue(struct net_device *dev)
{
clear_bit(__LINK_STATE_XOFF, &dev->state);
}
+/**
+ * netif_wake_queue - restart transmit
+ * @dev: network device
+ *
+ * Allow upper layers to call the device hard_start_xmit routine.
+ * Used for flow control when transmit resources are available.
+ */
static inline void netif_wake_queue(struct net_device *dev)
{
#ifdef CONFIG_NETPOLL_TRAP
__netif_schedule(dev);
}
+/**
+ * netif_stop_queue - stop transmitted packets
+ * @dev: network device
+ *
+ * Stop upper layers calling the device hard_start_xmit routine.
+ * Used for flow control when transmit resources are unavailable.
+ */
static inline void netif_stop_queue(struct net_device *dev)
{
set_bit(__LINK_STATE_XOFF, &dev->state);
}
+/**
+ * netif_queue_stopped - test if transmit queue is flowblocked
+ * @dev: network device
+ *
+ * Test if transmit queue on device is currently unable to send.
+ */
static inline int netif_queue_stopped(const struct net_device *dev)
{
return test_bit(__LINK_STATE_XOFF, &dev->state);
}
+/**
+ * netif_running - test if up
+ * @dev: network device
+ *
+ * Test if the device has been brought up.
+ */
static inline int netif_running(const struct net_device *dev)
{
return test_bit(__LINK_STATE_START, &dev->state);
* done at the overall netdevice level.
* Also test the device if we're multiqueue.
*/
+
+/**
+ * netif_start_subqueue - allow sending packets on subqueue
+ * @dev: network device
+ * @queue_index: sub queue index
+ *
+ * Start individual transmit queue of a device with multiple transmit queues.
+ */
static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
{
#ifdef CONFIG_NETDEVICES_MULTIQUEUE
#endif
}
+/**
+ * netif_stop_subqueue - stop sending packets on subqueue
+ * @dev: network device
+ * @queue_index: sub queue index
+ *
+ * Stop individual transmit queue of a device with multiple transmit queues.
+ */
static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
{
#ifdef CONFIG_NETDEVICES_MULTIQUEUE
#endif
}
+/**
+ * netif_subqueue_stopped - test status of subqueue
+ * @dev: network device
+ * @queue_index: sub queue index
+ *
+ * Check individual transmit queue of a device with multiple transmit queues.
+ */
static inline int netif_subqueue_stopped(const struct net_device *dev,
u16 queue_index)
{
#endif
}
+
+/**
+ * netif_wake_subqueue - allow sending packets on subqueue
+ * @dev: network device
+ * @queue_index: sub queue index
+ *
+ * Resume individual transmit queue of a device with multiple transmit queues.
+ */
static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
{
#ifdef CONFIG_NETDEVICES_MULTIQUEUE
#endif
}
+/**
+ * netif_is_multiqueue - test if device has multiple transmit queues
+ * @dev: network device
+ *
+ * Check if device has multiple transmit queues
+ * Always falls if NETDEVICE_MULTIQUEUE is not configured
+ */
static inline int netif_is_multiqueue(const struct net_device *dev)
{
#ifdef CONFIG_NETDEVICES_MULTIQUEUE
/* Use this variant when it is known for sure that it
* is executing from interrupt context.
*/
-static inline void dev_kfree_skb_irq(struct sk_buff *skb)
-{
- if (atomic_dec_and_test(&skb->users)) {
- struct softnet_data *sd;
- unsigned long flags;
-
- local_irq_save(flags);
- sd = &__get_cpu_var(softnet_data);
- skb->next = sd->completion_queue;
- sd->completion_queue = skb;
- raise_softirq_irqoff(NET_TX_SOFTIRQ);
- local_irq_restore(flags);
- }
-}
+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.
extern int dev_hard_start_xmit(struct sk_buff *skb,
struct net_device *dev);
-extern void dev_init(void);
-
extern int netdev_budget;
/* Called by rtnetlink.c:rtnl_unlock() */
extern void netdev_run_todo(void);
+/**
+ * dev_put - release reference to device
+ * @dev: network device
+ *
+ * Hold reference to device to keep it from being freed.
+ */
static inline void dev_put(struct net_device *dev)
{
atomic_dec(&dev->refcnt);
}
+/**
+ * dev_hold - get reference to device
+ * @dev: network device
+ *
+ * Release reference to device to allow it to be freed.
+ */
static inline void dev_hold(struct net_device *dev)
{
atomic_inc(&dev->refcnt);
extern void linkwatch_fire_event(struct net_device *dev);
+/**
+ * netif_carrier_ok - test if carrier present
+ * @dev: network device
+ *
+ * Check if carrier is present on device
+ */
static inline int netif_carrier_ok(const struct net_device *dev)
{
return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
extern void netif_carrier_off(struct net_device *dev);
+/**
+ * netif_dormant_on - mark device as dormant.
+ * @dev: network device
+ *
+ * Mark device as dormant (as per RFC2863).
+ *
+ * The dormant state indicates that the relevant interface is not
+ * actually in a condition to pass packets (i.e., it is not 'up') but is
+ * in a "pending" state, waiting for some external event. For "on-
+ * demand" interfaces, this new state identifies the situation where the
+ * interface is waiting for events to place it in the up state.
+ *
+ */
static inline void netif_dormant_on(struct net_device *dev)
{
if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
linkwatch_fire_event(dev);
}
+/**
+ * netif_dormant_off - set device as not dormant.
+ * @dev: network device
+ *
+ * Device is not in dormant state.
+ */
static inline void netif_dormant_off(struct net_device *dev)
{
if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
linkwatch_fire_event(dev);
}
+/**
+ * netif_dormant - test if carrier present
+ * @dev: network device
+ *
+ * Check if carrier is present on device
+ */
static inline int netif_dormant(const struct net_device *dev)
{
return test_bit(__LINK_STATE_DORMANT, &dev->state);
}
+/**
+ * netif_oper_up - test if device is operational
+ * @dev: network device
+ *
+ * Check if carrier is operational
+ */
static inline int netif_oper_up(const struct net_device *dev) {
return (dev->operstate == IF_OPER_UP ||
dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
}
-/* Hot-plugging. */
+/**
+ * netif_device_present - is device available or removed
+ * @dev: network device
+ *
+ * Check if device has not been removed from system.
+ */
static inline int netif_device_present(struct net_device *dev)
{
return test_bit(__LINK_STATE_PRESENT, &dev->state);
return (1 << debug_value) - 1;
}
-/* Test if receive needs to be scheduled */
-static inline int __netif_rx_schedule_prep(struct net_device *dev)
-{
- return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
-}
-
/* Test if receive needs to be scheduled but only if up */
-static inline int netif_rx_schedule_prep(struct net_device *dev)
+static inline int netif_rx_schedule_prep(struct net_device *dev,
+ struct napi_struct *napi)
{
- return netif_running(dev) && __netif_rx_schedule_prep(dev);
+ return netif_running(dev) && napi_schedule_prep(napi);
}
/* Add interface to tail of rx poll list. This assumes that _prep has
* already been called and returned 1.
*/
-
-extern void __netif_rx_schedule(struct net_device *dev);
+static inline void __netif_rx_schedule(struct net_device *dev,
+ struct napi_struct *napi)
+{
+ dev_hold(dev);
+ __napi_schedule(napi);
+}
/* Try to reschedule poll. Called by irq handler. */
-static inline void netif_rx_schedule(struct net_device *dev)
+static inline void netif_rx_schedule(struct net_device *dev,
+ struct napi_struct *napi)
{
- if (netif_rx_schedule_prep(dev))
- __netif_rx_schedule(dev);
+ if (netif_rx_schedule_prep(dev, napi))
+ __netif_rx_schedule(dev, napi);
}
-/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
- * Do not inline this?
- */
-static inline int netif_rx_reschedule(struct net_device *dev, int undo)
+/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
+static inline int netif_rx_reschedule(struct net_device *dev,
+ struct napi_struct *napi)
{
- if (netif_rx_schedule_prep(dev)) {
- unsigned long flags;
-
- dev->quota += undo;
-
- local_irq_save(flags);
- list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
- __raise_softirq_irqoff(NET_RX_SOFTIRQ);
- local_irq_restore(flags);
+ if (napi_schedule_prep(napi)) {
+ __netif_rx_schedule(dev, napi);
return 1;
}
return 0;
/* same as netif_rx_complete, except that local_irq_save(flags)
* has already been issued
*/
-static inline void __netif_rx_complete(struct net_device *dev)
+static inline void __netif_rx_complete(struct net_device *dev,
+ struct napi_struct *napi)
{
- BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
- list_del(&dev->poll_list);
- smp_mb__before_clear_bit();
- clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
+ __napi_complete(napi);
+ dev_put(dev);
}
/* Remove interface from poll list: it must be in the poll list
* it completes the work. The device cannot be out of poll list at this
* moment, it is BUG().
*/
-static inline void netif_rx_complete(struct net_device *dev)
+static inline void netif_rx_complete(struct net_device *dev,
+ struct napi_struct *napi)
{
unsigned long flags;
local_irq_save(flags);
- __netif_rx_complete(dev);
+ __netif_rx_complete(dev, napi);
local_irq_restore(flags);
}
-static inline void netif_poll_disable(struct net_device *dev)
-{
- while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
- /* No hurry. */
- schedule_timeout_interruptible(1);
-}
-
-static inline void netif_poll_enable(struct net_device *dev)
-{
- smp_mb__before_clear_bit();
- clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
-}
-
+/**
+ * netif_tx_lock - grab network device transmit lock
+ * @dev: network device
+ *
+ * Get network device transmit lock
+ */
static inline void netif_tx_lock(struct net_device *dev)
{
spin_lock(&dev->_xmit_lock);
struct netpoll_info {
atomic_t refcnt;
- spinlock_t poll_lock;
- int poll_owner;
int rx_flags;
spinlock_t rx_lock;
struct netpoll *rx_np; /* netpoll that registered an rx_hook */
return ret;
}
-static inline void *netpoll_poll_lock(struct net_device *dev)
+static inline int netpoll_receive_skb(struct sk_buff *skb)
{
+ if (!list_empty(&skb->dev->napi_list))
+ return netpoll_rx(skb);
+ return 0;
+}
+
+static inline void *netpoll_poll_lock(struct napi_struct *napi)
+{
+ struct net_device *dev = napi->dev;
+
rcu_read_lock(); /* deal with race on ->npinfo */
- if (dev->npinfo) {
- spin_lock(&dev->npinfo->poll_lock);
- dev->npinfo->poll_owner = smp_processor_id();
- return dev->npinfo;
+ if (dev && dev->npinfo) {
+ spin_lock(&napi->poll_lock);
+ napi->poll_owner = smp_processor_id();
+ return napi;
}
return NULL;
}
static inline void netpoll_poll_unlock(void *have)
{
- struct netpoll_info *npi = have;
+ struct napi_struct *napi = have;
- if (npi) {
- npi->poll_owner = -1;
- spin_unlock(&npi->poll_lock);
+ if (napi) {
+ napi->poll_owner = -1;
+ spin_unlock(&napi->poll_lock);
}
rcu_read_unlock();
}
+static inline void netpoll_netdev_init(struct net_device *dev)
+{
+ INIT_LIST_HEAD(&dev->napi_list);
+}
+
#else
-#define netpoll_rx(a) 0
-#define netpoll_poll_lock(a) NULL
-#define netpoll_poll_unlock(a)
+static inline int netpoll_rx(struct sk_buff *skb)
+{
+ return 0;
+}
+static inline int netpoll_receive_skb(struct sk_buff *skb)
+{
+ return 0;
+}
+static inline void *netpoll_poll_lock(struct napi_struct *napi)
+{
+ return NULL;
+}
+static inline void netpoll_poll_unlock(void *have)
+{
+}
+static inline void netpoll_netdev_init(struct net_device *dev)
+{
+}
#endif
#endif
* Device drivers call our routines to queue packets here. We empty the
* queue in the local softnet handler.
*/
-DEFINE_PER_CPU(struct softnet_data, softnet_data) = { NULL };
+
+DEFINE_PER_CPU(struct softnet_data, softnet_data);
#ifdef CONFIG_SYSFS
extern int netdev_sysfs_init(void);
clear_bit(__LINK_STATE_START, &dev->state);
/* Synchronize to scheduled poll. We cannot touch poll list,
- * it can be even on different cpu. So just clear netif_running(),
- * and wait when poll really will happen. Actually, the best place
- * for this is inside dev->stop() after device stopped its irq
- * engine, but this requires more changes in devices. */
-
+ * it can be even on different cpu. So just clear netif_running().
+ *
+ * dev->stop() will invoke napi_disable() on all of it's
+ * napi_struct instances on this device.
+ */
smp_mb__after_clear_bit(); /* Commit netif_running(). */
- while (test_bit(__LINK_STATE_RX_SCHED, &dev->state)) {
- /* No hurry. */
- msleep(1);
- }
/*
* Call the device specific close. This cannot fail.
}
EXPORT_SYMBOL(__netif_schedule);
-void __netif_rx_schedule(struct net_device *dev)
+void dev_kfree_skb_irq(struct sk_buff *skb)
{
- unsigned long flags;
+ if (atomic_dec_and_test(&skb->users)) {
+ struct softnet_data *sd;
+ unsigned long flags;
- local_irq_save(flags);
- dev_hold(dev);
- list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
- if (dev->quota < 0)
- dev->quota += dev->weight;
- else
- dev->quota = dev->weight;
- __raise_softirq_irqoff(NET_RX_SOFTIRQ);
- local_irq_restore(flags);
+ local_irq_save(flags);
+ sd = &__get_cpu_var(softnet_data);
+ skb->next = sd->completion_queue;
+ sd->completion_queue = skb;
+ raise_softirq_irqoff(NET_TX_SOFTIRQ);
+ local_irq_restore(flags);
+ }
}
-EXPORT_SYMBOL(__netif_rx_schedule);
+EXPORT_SYMBOL(dev_kfree_skb_irq);
void dev_kfree_skb_any(struct sk_buff *skb)
{
EXPORT_SYMBOL(dev_kfree_skb_any);
-/* Hot-plugging. */
+/**
+ * netif_device_detach - mark device as removed
+ * @dev: network device
+ *
+ * Mark device as removed from system and therefore no longer available.
+ */
void netif_device_detach(struct net_device *dev)
{
if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) &&
}
EXPORT_SYMBOL(netif_device_detach);
+/**
+ * netif_device_attach - mark device as attached
+ * @dev: network device
+ *
+ * Mark device as attached from system and restart if needed.
+ */
void netif_device_attach(struct net_device *dev)
{
if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) &&
return NET_RX_SUCCESS;
}
- netif_rx_schedule(&queue->backlog_dev);
+ napi_schedule(&queue->backlog);
goto enqueue;
}
return dev;
}
+
static void net_tx_action(struct softirq_action *h)
{
struct softnet_data *sd = &__get_cpu_var(softnet_data);
__be16 type;
/* if we've gotten here through NAPI, check netpoll */
- if (skb->dev->poll && netpoll_rx(skb))
+ if (netpoll_receive_skb(skb))
return NET_RX_DROP;
if (!skb->tstamp.tv64)
return ret;
}
-static int process_backlog(struct net_device *backlog_dev, int *budget)
+static int process_backlog(struct napi_struct *napi, int quota)
{
int work = 0;
- int quota = min(backlog_dev->quota, *budget);
struct softnet_data *queue = &__get_cpu_var(softnet_data);
unsigned long start_time = jiffies;
- backlog_dev->weight = weight_p;
- for (;;) {
+ napi->weight = weight_p;
+ do {
struct sk_buff *skb;
struct net_device *dev;
local_irq_disable();
skb = __skb_dequeue(&queue->input_pkt_queue);
- if (!skb)
- goto job_done;
+ if (!skb) {
+ __napi_complete(napi);
+ local_irq_enable();
+ break;
+ }
+
local_irq_enable();
dev = skb->dev;
netif_receive_skb(skb);
dev_put(dev);
+ } while (++work < quota && jiffies == start_time);
- work++;
-
- if (work >= quota || jiffies - start_time > 1)
- break;
-
- }
-
- backlog_dev->quota -= work;
- *budget -= work;
- return -1;
-
-job_done:
- backlog_dev->quota -= work;
- *budget -= work;
+ return work;
+}
- list_del(&backlog_dev->poll_list);
- smp_mb__before_clear_bit();
- netif_poll_enable(backlog_dev);
+/**
+ * __napi_schedule - schedule for receive
+ * @napi: entry to schedule
+ *
+ * The entry's receive function will be scheduled to run
+ */
+void fastcall __napi_schedule(struct napi_struct *n)
+{
+ unsigned long flags;
- local_irq_enable();
- return 0;
+ local_irq_save(flags);
+ list_add_tail(&n->poll_list, &__get_cpu_var(softnet_data).poll_list);
+ __raise_softirq_irqoff(NET_RX_SOFTIRQ);
+ local_irq_restore(flags);
}
+EXPORT_SYMBOL(__napi_schedule);
+
static void net_rx_action(struct softirq_action *h)
{
- struct softnet_data *queue = &__get_cpu_var(softnet_data);
+ struct list_head *list = &__get_cpu_var(softnet_data).poll_list;
unsigned long start_time = jiffies;
int budget = netdev_budget;
void *have;
local_irq_disable();
- while (!list_empty(&queue->poll_list)) {
- struct net_device *dev;
+ while (!list_empty(list)) {
+ struct napi_struct *n;
+ int work, weight;
- if (budget <= 0 || jiffies - start_time > 1)
+ /* If softirq window is exhuasted then punt.
+ *
+ * Note that this is a slight policy change from the
+ * previous NAPI code, which would allow up to 2
+ * jiffies to pass before breaking out. The test
+ * used to be "jiffies - start_time > 1".
+ */
+ if (unlikely(budget <= 0 || jiffies != start_time))
goto softnet_break;
local_irq_enable();
- dev = list_entry(queue->poll_list.next,
- struct net_device, poll_list);
- have = netpoll_poll_lock(dev);
+ /* Even though interrupts have been re-enabled, this
+ * access is safe because interrupts can only add new
+ * entries to the tail of this list, and only ->poll()
+ * calls can remove this head entry from the list.
+ */
+ n = list_entry(list->next, struct napi_struct, poll_list);
- if (dev->quota <= 0 || dev->poll(dev, &budget)) {
- netpoll_poll_unlock(have);
- local_irq_disable();
- list_move_tail(&dev->poll_list, &queue->poll_list);
- if (dev->quota < 0)
- dev->quota += dev->weight;
- else
- dev->quota = dev->weight;
- } else {
- netpoll_poll_unlock(have);
- dev_put(dev);
- local_irq_disable();
- }
+ have = netpoll_poll_lock(n);
+
+ weight = n->weight;
+
+ work = n->poll(n, weight);
+
+ WARN_ON_ONCE(work > weight);
+
+ budget -= work;
+
+ local_irq_disable();
+
+ /* Drivers must not modify the NAPI state if they
+ * consume the entire weight. In such cases this code
+ * still "owns" the NAPI instance and therefore can
+ * move the instance around on the list at-will.
+ */
+ if (unlikely(work == weight))
+ list_move_tail(&n->poll_list, list);
+
+ netpoll_poll_unlock(have);
}
out:
local_irq_enable();
+
#ifdef CONFIG_NET_DMA
/*
* There may not be any more sk_buffs coming right now, so push
}
}
#endif
+
return;
softnet_break:
dev->egress_subqueue_count = queue_count;
dev->get_stats = internal_stats;
+ netpoll_netdev_init(dev);
setup(dev);
strcpy(dev->name, name);
return dev;
skb_queue_head_init(&queue->input_pkt_queue);
queue->completion_queue = NULL;
INIT_LIST_HEAD(&queue->poll_list);
- set_bit(__LINK_STATE_START, &queue->backlog_dev.state);
- queue->backlog_dev.weight = weight_p;
- queue->backlog_dev.poll = process_backlog;
- atomic_set(&queue->backlog_dev.refcnt, 1);
+
+ queue->backlog.poll = process_backlog;
+ queue->backlog.weight = weight_p;
}
netdev_dma_register();
return netdev_store(dev, attr, buf, len, change_tx_queue_len);
}
-NETDEVICE_SHOW(weight, fmt_dec);
-
-static int change_weight(struct net_device *net, unsigned long new_weight)
-{
- net->weight = new_weight;
- return 0;
-}
-
-static ssize_t store_weight(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t len)
-{
- return netdev_store(dev, attr, buf, len, change_weight);
-}
-
static struct device_attribute net_class_attributes[] = {
__ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
__ATTR(iflink, S_IRUGO, show_iflink, NULL),
__ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags),
__ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,
store_tx_queue_len),
- __ATTR(weight, S_IRUGO | S_IWUSR, show_weight, store_weight),
{}
};
static void poll_napi(struct netpoll *np)
{
struct netpoll_info *npinfo = np->dev->npinfo;
+ struct napi_struct *napi;
int budget = 16;
- if (test_bit(__LINK_STATE_RX_SCHED, &np->dev->state) &&
- npinfo->poll_owner != smp_processor_id() &&
- spin_trylock(&npinfo->poll_lock)) {
- npinfo->rx_flags |= NETPOLL_RX_DROP;
- atomic_inc(&trapped);
+ list_for_each_entry(napi, &np->dev->napi_list, dev_list) {
+ if (test_bit(NAPI_STATE_SCHED, &napi->state) &&
+ napi->poll_owner != smp_processor_id() &&
+ spin_trylock(&napi->poll_lock)) {
+ npinfo->rx_flags |= NETPOLL_RX_DROP;
+ atomic_inc(&trapped);
- np->dev->poll(np->dev, &budget);
+ napi->poll(napi, budget);
- atomic_dec(&trapped);
- npinfo->rx_flags &= ~NETPOLL_RX_DROP;
- spin_unlock(&npinfo->poll_lock);
+ atomic_dec(&trapped);
+ npinfo->rx_flags &= ~NETPOLL_RX_DROP;
+ spin_unlock(&napi->poll_lock);
+ }
}
}
/* Process pending work on NIC */
np->dev->poll_controller(np->dev);
- if (np->dev->poll)
+ if (!list_empty(&np->dev->napi_list))
poll_napi(np);
service_arp_queue(np->dev->npinfo);
return skb;
}
+static int netpoll_owner_active(struct net_device *dev)
+{
+ struct napi_struct *napi;
+
+ list_for_each_entry(napi, &dev->napi_list, dev_list) {
+ if (napi->poll_owner == smp_processor_id())
+ return 1;
+ }
+ return 0;
+}
+
static void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
{
int status = NETDEV_TX_BUSY;
}
/* don't get messages out of order, and no recursion */
- if (skb_queue_len(&npinfo->txq) == 0 &&
- npinfo->poll_owner != smp_processor_id()) {
+ if (skb_queue_len(&npinfo->txq) == 0 && !netpoll_owner_active(dev)) {
unsigned long flags;
local_irq_save(flags);
npinfo->rx_flags = 0;
npinfo->rx_np = NULL;
- spin_lock_init(&npinfo->poll_lock);
- npinfo->poll_owner = -1;
spin_lock_init(&npinfo->rx_lock);
skb_queue_head_init(&npinfo->arp_tx);
NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len);
- NLA_PUT_U32(skb, IFLA_WEIGHT, dev->weight);
NLA_PUT_U8(skb, IFLA_OPERSTATE,
netif_running(dev) ? dev->operstate : IF_OPER_DOWN);
NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode);
if (tb[IFLA_TXQLEN])
dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
- if (tb[IFLA_WEIGHT])
- dev->weight = nla_get_u32(tb[IFLA_WEIGHT]);
-
if (tb[IFLA_OPERSTATE])
set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
nla_len(tb[IFLA_BROADCAST]));
if (tb[IFLA_TXQLEN])
dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
- if (tb[IFLA_WEIGHT])
- dev->weight = nla_get_u32(tb[IFLA_WEIGHT]);
if (tb[IFLA_OPERSTATE])
set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
if (tb[IFLA_LINKMODE])
netif_tx_unlock_bh(dev);
}
+/**
+ * netif_carrier_on - set carrier
+ * @dev: network device
+ *
+ * Device has detected that carrier.
+ */
void netif_carrier_on(struct net_device *dev)
{
if (test_and_clear_bit(__LINK_STATE_NOCARRIER, &dev->state))
__netdev_watchdog_up(dev);
}
+/**
+ * netif_carrier_off - clear carrier
+ * @dev: network device
+ *
+ * Device has detected loss of carrier.
+ */
void netif_carrier_off(struct net_device *dev)
{
if (!test_and_set_bit(__LINK_STATE_NOCARRIER, &dev->state))
projects / linux-2.6-omap-h63xx.git / commitdiff