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path: root/drivers/firewire/net.c
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2015-03-02net: Kill dev_rebuild_headerEric W. Biederman
Now that there are no more users kill dev_rebuild_header and all of it's implementations. This is long overdue. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-15net: set name_assign_type in alloc_netdev()Tom Gundersen
Extend alloc_netdev{,_mq{,s}}() to take name_assign_type as argument, and convert all users to pass NET_NAME_UNKNOWN. Coccinelle patch: @@ expression sizeof_priv, name, setup, txqs, rxqs, count; @@ ( -alloc_netdev_mqs(sizeof_priv, name, setup, txqs, rxqs) +alloc_netdev_mqs(sizeof_priv, name, NET_NAME_UNKNOWN, setup, txqs, rxqs) | -alloc_netdev_mq(sizeof_priv, name, setup, count) +alloc_netdev_mq(sizeof_priv, name, NET_NAME_UNKNOWN, setup, count) | -alloc_netdev(sizeof_priv, name, setup) +alloc_netdev(sizeof_priv, name, NET_NAME_UNKNOWN, setup) ) v9: move comments here from the wrong commit Signed-off-by: Tom Gundersen <teg@jklm.no> Reviewed-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-12firewire: net: fix NULL derefencing in fwnet_probe()Daeseok Youn
"dev" and "net" are NULL when alloc_netdev() is failed. So just unlock and return an error. Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2014-02-28firewire: net: fix use after freeStefan Richter
Commit 8408dc1c14c1 "firewire: net: use dev_printk API" introduced a use-after-free in a failure path. fwnet_transmit_packet_failed(ptask) may free ptask, then the dev_err() call dereferenced it. The fix is straightforward; simply reorder the two calls. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: stable@vger.kernel.org # v3.4+ Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2013-06-09firewire: introduce fw_driver.probe and .remove methodsStefan Richter
FireWire upper layer drivers are converted from generic struct driver.probe() and .remove() to bus-specific struct fw_driver.probe() and .remove(). The new .probe() adds a const struct ieee1394_device_id *id argument, indicating the entry in the driver's device identifiers table which matched the fw_unit to be probed. This new argument is used by the snd-firewire-speakers driver to look up device-specific parameters and methods. There is at least one other FireWire audio driver currently in development in which this will be useful too. The new .remove() drops the unused error return code. Although all in-tree drivers are being converted to the new methods, support for the old methods is left in place in this commit. This allows public developer trees to merge this commit and then move to the new fw_driver methods. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Acked-by: Clemens Ladisch <clemens@ladisch.de> (for sound/firewire/) Cc: Peter Hurley <peter@hurleysoftware.com> (for drivers/staging/fwserial/)
2013-05-09Merge tag 'firewire-updates' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394 Pull firewure updates from Stefan Richter: - fix controller removal when controller is in suspended state - fix video reception on VIA VT6306 with gstreamer, MythTV, and maybe dv4l - fix a startup issue with Agere/LSI FW643-e2 - error logging improvements and other small updates * tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394: firewire: ohci: dump_stack() for PHY regs read/write failures firewire: ohci: Improve bus reset error messages firewire: ohci: Alias dev_* log functions firewire: ohci: Fix 'failed to read phy reg' on FW643 rev8 firewire: ohci: fix VIA VT6306 video reception firewire: ohci: Check LPS before register access on pci removal firewire: ohci: Fix double free_irq() firewire: remove unnecessary alloc/OOM messages firewire: sbp2: replace BUG_ON by WARN_ON firewire: core: remove an always false test firewire: Remove two unneeded checks for macros
2013-04-28firewire: remove unnecessary alloc/OOM messagesStefan Richter
These are redundant to log messages from the mm core. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2013-03-28net: add ETH_P_802_3_MINSimon Horman
Add a new constant ETH_P_802_3_MIN, the minimum ethernet type for an 802.3 frame. Frames with a lower value in the ethernet type field are Ethernet II. Also update all the users of this value that David Miller and I could find to use the new constant. Also correct a bug in util.c. The comparison with ETH_P_802_3_MIN should be >= not >. As suggested by Jesse Gross. Compile tested only. Cc: David Miller <davem@davemloft.net> Cc: Jesse Gross <jesse@nicira.com> Cc: Karsten Keil <isdn@linux-pingi.de> Cc: John W. Linville <linville@tuxdriver.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Bart De Schuymer <bart.de.schuymer@pandora.be> Cc: Stephen Hemminger <stephen@networkplumber.org> Cc: Patrick McHardy <kaber@trash.net> Cc: Marcel Holtmann <marcel@holtmann.org> Cc: Gustavo Padovan <gustavo@padovan.org> Cc: Johan Hedberg <johan.hedberg@gmail.com> Cc: linux-bluetooth@vger.kernel.org Cc: netfilter-devel@vger.kernel.org Cc: bridge@lists.linux-foundation.org Cc: linux-wireless@vger.kernel.org Cc: linux1394-devel@lists.sourceforge.net Cc: linux-media@vger.kernel.org Cc: netdev@vger.kernel.org Cc: dev@openvswitch.org Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com> Acked-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-26firewire net, ipv6: IPv6 over Firewire (RFC3146) support.YOSHIFUJI Hideaki / 吉藤英明
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-26firewire net, ipv4 arp: Extend hardware address and remove driver-level ↵YOSHIFUJI Hideaki / 吉藤英明
packet inspection. Inspection of upper layer protocol is considered harmful, especially if it is about ARP or other stateful upper layer protocol; driver cannot (and should not) have full state of them. IPv4 over Firewire module used to inspect ARP (both in sending path and in receiving path), and record peer's GUID, max packet size, max speed and fifo address. This patch removes such inspection by extending our "hardware address" definition to include other information as well: max packet size, max speed and fifo. By doing this, The neighbour module in networking subsystem can cache them. Note: As we have started ignoring sspd and max_rec in ARP/NDP, those information will not be used in the driver when sending. When a packet is being sent, the IP layer fills our pseudo header with the extended "hardware address", including GUID and fifo. The driver can look-up node-id (the real but rather volatile low-level address) by GUID, and then the module can send the packet to the wire using parameters provided in the extendedn hardware address. This approach is realistic because IP over IEEE1394 (RFC2734) and IPv6 over IEEE1394 (RFC3146) share same "hardware address" format in their address resolution protocols. Here, extended "hardware address" is defined as follows: union fwnet_hwaddr { u8 u[16]; struct { __be64 uniq_id; /* EUI-64 */ u8 max_rec; /* max packet size */ u8 sspd; /* max speed */ __be16 fifo_hi; /* hi 16bits of FIFO addr */ __be32 fifo_lo; /* lo 32bits of FIFO addr */ } __packed uc; }; Note that Hardware address is declared as union, so that we can map full IP address into this, when implementing MCAP (Multicast Cannel Allocation Protocol) for IPv6, but IP and ARP subsystem do not need to know this format in detail. One difference between original ARP (RFC826) and 1394 ARP (RFC2734) is that 1394 ARP Request/Reply do not contain the target hardware address field (aka ar$tha). This difference is handled in the ARP subsystem. CC: Stephan Gatzka <stephan.gatzka@gmail.com> Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-26firewire net: Ignore spd and max_payload advertised by ARP.YOSHIFUJI Hideaki / 吉藤英明
Stefan Richter <stefanr@s5r6.in-berlin.de> says: | As far as I can tell, it would be best to ignore max_rec and sspd from ARP | and NDP but keep using the respective information from firewire-core | instead (handed over by fwnet_probe()). | | Why? As I noted earlier, RFC 2734:1999 and RFC 3146:2001 were apparently | written with a too simplistic notion of IEEE 1394 bus topology, resulting | in max_rec and sspd in ARP-1394 and NDP-1394 to be useless, IMO. | | Consider a bus like this: | | A ---- B ==== C | | A, B, C are all IP-over-1394 capable nodes. ---- is an S400 cable hop, | and ==== is an S800 cable hop. | | In case of unicasts or multicasts in which node A is involved as | transmitter or receiver, as well as in case of broadcasts, the speeds | S100, S200, S400 work and speed S400 is optimal. | | In case of anything else, IOW in case of unicasts or multicasts in which | only nodes B and C are involved, the speeds S100, S200, S400, S800 work | and speed S800 is optimal. | | Clearly, node A should indicate sspd = S400 in its ARP or NDP packets. | But which sspd should nodes B and C set there? Maybe they set S400, which | would work but would waste half of the available bandwidth in the second | case. Or maybe they set S800, which is OK in the second case but would | prohibit any communication with node A if blindly taken for correct. | | On the other hand, firewire-core *always* gives us the correct and optimum | peer-to-peer speed and asynchronous packet payload, no matter how simple | or complex the bus topology is and no matter in which temporal order nodes | join the bus and are discovered. CC: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-26firewire net: Allocate address handler before registering net_device.YOSHIFUJI Hideaki / 吉藤英明
Allocate FIFO address before registering net_device. This is preparation to change the pseudo hardware address format for firewire devices to include the offset of the FIFO for receipt of unicast datagrams, instead of mangling ARP/NDP messages in the driver layer. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-26firewire net: Send L2 multicast via GASP.YOSHIFUJI Hideaki / 吉藤英明
Send L2 multicast packet via GASP (Global asynchronous stream packet) by seeing the multicast bit in the L2 hardware address, not by seeing upper- layer protocol address. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-26firewire net: Accept IPv4 and ARP only.YOSHIFUJI Hideaki / 吉藤英明
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-13firewire net: Release broadcast/fifo resources on ifdown.YOSHIFUJI Hideaki
Since those resources are allocated on ifup, relsase them on ifdown. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2013-03-13firewire net: Introduce fwnet_broadcast_stop() to destroy broadcast resources.YOSHIFUJI Hideaki
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2013-03-13firewire net: Allocate dev->broadcast_rcv_buffer_ptrs early.YOSHIFUJI Hideaki
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2013-03-13firewire net: Fix leakage of kmap for broadcast receive buffer.YOSHIFUJI Hideaki
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2013-03-13firewire net: Omit checking dev->broadcast_rcv_context in ↵YOSHIFUJI Hideaki
fwnet_broadcast_start(). dev->broadcast_rcv_context is always non-NULL if dev->broadcast_state is not FWNET_BROADCAST_ERROR. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2013-03-13firewire net: Clear dev->broadcast_rcv_context and dev->broadcast_state ↵YOSHIFUJI Hideaki
after destruction of context. Clear dev->broadcast_rcv_context to NULL and set dev->broadcast_state to FWNET_BROADCAST_ERROR after descruction of broadcast context. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2013-03-13firewire net: Fix memory leakage in fwnet_remove().YOSHIFUJI Hideaki
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2013-03-13firewire net: Check dev->broadcast_state inside fwnet_broadcast_start().YOSHIFUJI Hideaki
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2013-03-13firewire net: Setup broadcast and local fifo independently.YOSHIFUJI Hideaki
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2013-03-13firewire net: Introduce fwnet_fifo_{start, stop}() helpers.YOSHIFUJI Hideaki
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2013-03-13firewire net: No need to reset dev->local_fifo after failure of ↵YOSHIFUJI Hideaki
fw_core_add_address_handler(). fwnet_broadcast_start() try to register address handler at first if it was not registered yet; dev->local_fifo == FWNET_NO_FIFO_ADDR. Since dev->local_info not changed if fw_core_add_address_hander() has failed, we do not need to set dev->local_info to FWNET_NO_FIFO_ADDR. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2013-01-20firewire net: Use LL_RESERVED_SPACE(), HH_DATA_OFF().YOSHIFUJI Hideaki / 吉藤英明
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-20firewire net: Ensure checksumming in upper layer.YOSHIFUJI Hideaki / 吉藤英明
It is wrong to set skb->ip_summed to CHECKSUM_UNNECESSARY unless the device has already checked it. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-12-03firewire: net: remove unused variable in fwnet_receive_broadcast()Wei Yongjun
The variable card is initialized but never used otherwise, so remove the unused variable. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2012-12-02firewire: net: Fix handling of fragmented multicast/broadcast packets.Stephan Gatzka
This patch fixes both the transmit and receive portion of sending fragmented mutlicast and broadcast packets. The transmit section was broken because the offset for INTFRAG and LASTFRAG packets were just miscalculated by IEEE1394_GASP_HDR_SIZE (which was reserved with skb_push() in fwnet_send_packet). The receive section was broken because in fwnet_incoming_packet is a call to fwnet_peer_find_by_node_id(). Called with generation == -1 it will not find a peer and the partial datagrams are associated to a peer. [Stefan R: The fix to use context->card->generation is not perfect. It relies on the IR tasklet which processes packets from the prior bus generation to run before the self-ID-complete worklet which sets the current card generation. Alas, there is no simple way of a race-free implementation. Let's do it this way for now.] Signed-off-by: Stephan Gatzka <stephan.gatzka@gmail.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2012-02-22firewire: net: use dev_printk APIStefan Richter
Change the log line prefix from "firewire_net: " to "net firewire0: " etc. for the case that several RFC 2734 interfaces are being used in the same machine. Note, the netdev_printk API is not very useful to firewire-net. netdev_notice(net, "abc\n") would result in irritating messages like "firewire_ohci 0000:0a:00.0: firewire0: abc". Nor would a dev_printk on the fw_unit.device to which firewire-net is being bound be useful, because there are generally multiple ones of those per interface (from all RFC 2734 peers on the bus, the local node being only one of them). In the initialization message of each interface, log the PCI device name of the card which is parent of the netdevice instead of the GUID of the peer which was semi-randomly used to establish the netdevice. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2012-02-22firewire: net: identify to driver core as "firewire_net", not "net"Stefan Richter
On second thought, there is little reason to have driver name differ from module name. Therefore, change /sys/bus/firewire/drivers/net /sys/bus/firewire/devices/fw0.0/driver -> [...]/net /sys/module/firewire_net/drivers/firewire:net to /sys/bus/firewire/drivers/firewire_net /sys/bus/firewire/devices/fw0.0/driver -> [...]/firewire_net /sys/module/firewire_net/drivers/firewire:firewire_net It is redundant but consistent with firewire-sbp2's recently changed driver name. I don't see this anywhere used, so it should not matter either way. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2011-10-09firewire: net: Use posted writesStephan Gatzka
Change memory region to ohci "middle address space". This effectively reduces the number of packets by 50%. [Stefan R.:] This eliminates 1394 ack packets and improved throughput by a few percent in some tests with an S400a connection with and without gap count optimization. Since firewire-net taxes the AR-req DMA unit of a FireWire controller much more than firewire-sbp2 (which uses the middle address space with PCI posted writes too), this commit also changes a related error printk into a ratelimited one as a precaution. Side note: The IPv4-over-1394 drivers of Mac OS X 10.4, Windows XP SP3, and the Thesycon 1394 bus driver for Windows all use the middle address space too. Signed-off-by: Stephan Gatzka <stephan@gatzka.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2011-10-09firewire: use clamp and min3 macrosStefan Richter
Use kernel.h's convenience macros. Also omit a printk that should never happen and won't matter much if it ever happened. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2011-07-22Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: firewire: document the sysfs ABIs firewire: cdev: ABI documentation enhancements firewire: cdev: prevent race between first get_info ioctl and bus reset event queuing firewire: cdev: return -ENOTTY for unimplemented ioctls, not -EINVAL firewire: ohci: skip soft reset retries after card ejection firewire: ohci: fix PHY reg access after card ejection firewire: ohci: add a comment on PHY reg access serialization firewire: ohci: reduce potential context_stop latency firewire: ohci: remove superfluous posted write flushes firewire: net: replacing deprecated __attribute__((packed)) with __packed
2011-07-13net: Push protocol type directly down to header_ops->cache()David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-02firewire: net: replacing deprecated __attribute__((packed)) with __packedAugust Lilleaas
Fixing a deprecation, replacing __attribute__((packed)) with __packed. It was deprecated for portability, specifically to avoid GCC specific code. See commit 82ddcb040570411fc2d421d96b3e69711c670328. Signed-off-by: August Lilleaas <august@augustl.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (added include compiler.h)
2011-05-10firewire: optimize iso queueing by setting wake only after the last packetClemens Ladisch
When queueing iso packets, the run time is dominated by the two MMIO accesses that set the DMA context's wake bit. Because most drivers submit packets in batches, we can save much time by removing all but the last wakeup. The internal kernel API is changed to require a call to fw_iso_context_queue_flush() after a batch of queued packets. The user space API does not change, so one call to FW_CDEV_IOC_QUEUE_ISO must specify multiple packets to take advantage of this optimization. In my measurements, this patch reduces the time needed to queue fifty skip packets from userspace to one sixth on a 2.5 GHz CPU, or to one third at 800 MHz. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2011-03-31Fix common misspellingsLucas De Marchi
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-01-21firewire: net: invalidate ARP entries of removed nodesMaxim Levitsky
This makes it possible to resume communication with a node that dropped off the bus for a brief period. Otherwise communication will only be possible after ARP cache entry timeouts. Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (rebased)
2010-12-19firewire: net: set carrier state at ifupStefan Richter
At ifup, carrier status would be shown on even if it actually was off. Also add an include for ethtool_ops rather than to rely on the one from netdevice.h. Note, we can alas not use fwnet_device_mutex to serialize access to dev->peer_count (as I originally wanted). This would cause a lock inversion: - fwnet_probe | takes fwnet_device_mutex + register_netdev | takes rtnl_mutex - devinet_ioctl | takes rtnl_mutex + fwnet_open | ...must not take fwnet_device_mutex Hence use the dev->lock spinlock for serialization. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2010-12-19firewire: net: add carrier detectionMaxim Levitsky
To make userland, e.g. NetworkManager work with firewire, we need to detect whether cable is plugged or not. Simple and correct way of doing that is just counting number of peers. No peers - no link and vice versa. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2010-12-13firewire: net: ratelimit error messagesMaxim Levitsky
Unfortunately its easy to trigger such error messages by removing the cable while sending streams of data over the link. Such errors are normal, and therefore this patch stops firewire-net from flooding the kernel log with these errors, by combining series of same errors together. Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> (Stefan R:) Eventually we should remove this logging when firewire-net and related firewire-ohci facilities have been stabilized. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2010-11-17firewire: net: throttle TX queue before running out of tlabelsStefan Richter
This prevents firewire-net from submitting write requests in fast succession until failure due to all 64 transaction labels were used up for unfinished split transactions. The netif_stop/wake_queue API is used for this purpose. Without this stop/wake mechanism, datagrams were simply lost whenever the tlabel pool was exhausted. Plus, tlabel exhaustion by firewire-net also prevented other unrelated outbound transactions to be initiated. The chosen queue depth was checked by me to hit the maximum possible throughput with an OS X peer whose receive DMA is good enough to never reject requests due to busy inbound request FIFO. Current Linux peers show a mixed picture of -5%...+15% change in bandwidth; their current bottleneck are RCODE_BUSY situations (fewer or more, depending on TX queue depth) due to too small AR buffer in firewire-ohci. Maxim Levitsky tested this change with similar watermarks with a Linux peer and some pending firewire-ohci improvements that address the RCODE_BUSY problem and confirmed that these TX queue limits are good. Note: This removes some netif_wake_queue from reception code paths. They were apparently copy&paste artefacts from a nonsensical netif_wake_queue use in the older eth1394 driver. This belongs only into the transmit path. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Tested-by: Maxim Levitsky <maximlevitsky@gmail.com>
2010-11-17firewire: net: replace lists by countersStefan Richter
The current transmit code does not at all make use of - fwnet_device.packet_list and only very limited use of - fwnet_device.broadcasted_list, - fwnet_device.queued_packets. Their current function is to track whether the TX soft-IRQ finished dealing with an skb when the AT-req tasklet takes over, and to discard pending tx datagrams (if there are any) when the local node is removed. The latter does actually contain a race condition bug with TX soft-IRQ and AT-req tasklet. Instead of these lists and the corresponding link in fwnet_packet_task, - a flag in fwnet_packet_task to track whether fwnet_tx is done, - a counter of queued datagrams in fwnet_device do the job as well. The above mentioned theoretic race condition is resolved by letting fwnet_remove sleep until all datagrams were flushed. It may sleep almost arbitrarily long since fwnet_remove is executed in the context of a multithreaded (concurrency managed) workqueue. The type of max_payload is changed to u16 here to avoid waste in struct fwnet_packet_task. This value cannot exceed 4096 per IEEE 1394:2008 table 16-18 (or 32678 per specification of packet headers, if there is ever going to be something else than beta mode). Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2010-11-17firewire: net: fix memory leaksStefan Richter
a) fwnet_transmit_packet_done used to poison ptask->pt_link by list_del. If fwnet_send_packet checked later whether it was responsible to clean up (in the border case that the TX soft IRQ was outpaced by the AT-req tasklet on another CPU), it missed this because ptask->pt_link was no longer shown as empty. b) If fwnet_write_complete got an rcode other than RCODE_COMPLETE, we missed to free the skb and ptask entirely. Also, count stats.tx_dropped and stats.tx_errors when rcode != 0. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2010-11-17firewire: net: count stats.tx_packets and stats.tx_bytesStefan Richter
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2010-09-09Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: net/mac80211/main.c
2010-08-19firewire: net: fix unicast reception RCODE in failure pathsStefan Richter
The incoming request hander fwnet_receive_packet() expects subsequent datagram handling code to return non-zero on errors. However, almost none of the failure paths did so. Fix them all. (This error reporting is used to send and RCODE_CONFLICT_ERROR to the sender node in such failure cases. Two modes of failure exist: Out of memory, or firewire-net is unaware of any peer node to which a fragment or an ARP packet belongs. However, it is unclear whether a sender can actually make use of such information. A Linux peer apparently can't. Maybe it should all be simplified to void functions.) Reported-by: Julia Lawall <julia@diku.dk> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2010-08-17ethtool: Provide a default implementation of ethtool_ops::get_drvinfoBen Hutchings
The driver name and bus address for a net_device can normally be found through the driver model now. Instead of requiring drivers to provide this information redundantly through the ethtool_ops::get_drvinfo operation, use the driver model to do so if the driver does not define the operation. Since ETHTOOL_GDRVINFO no longer requires the driver to implement any operations, do not require net_device::ethtool_ops to be set either. Remove implementations of get_drvinfo and ethtool_ops that provide only this information. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-08-02Merge firewire branches to be released post v2.6.35Stefan Richter
Conflicts: drivers/firewire/core-card.c drivers/firewire/core-cdev.c and forgotten #include <linux/time.h> in drivers/firewire/ohci.c Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>