- Dec 10, 2013
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Don Skidmore authored
This patch makes it so that head, tail, next to clean, and next to use are all reset in a single function for the Tx or Rx path. Previously the code for this was spread out over several areas which could make it difficult to track what the values for these were. Signed-off-by:
Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by:
Don Skidmore <donald.c.skidmore@intel.com> Tested-by:
Phil Schmitt <phillip.j.schmitt@intel.com> Signed-off-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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Jacob Keller authored
This patch updates the ixgbevf Kconfig description, as the VF driver supports more than just the 82599 device. This patch renames the config menu item, as well as updates the help description to make it more obvious that the driver supports more than just a single device group. Signed-off-by:
Jacob Keller <jacob.e.keller@intel.com> Tested-by:
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Catherine Sullivan authored
Version updated to 0.3.13-k Signed-off-by:
Catherine Sullivan <catherine.sullivan@intel.com> Signed-off-by:
Jesse Brandeburg <jesse.brandeburg@intel.com> Tested-by:
Kavindya Deegala <kavindya.s.deegala@intel.com> Signed-off-by:
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Jesse Brandeburg authored
I40E_ITR_NONE was being used as an ITRN register index by accident because it was easily associated with the I40E_RX_ITR and friends defines. Change the name slightly in order to make it clear that I40E_ITR_NONE is really associated with the DYN_CTL register sets. Change-Id: I04702c027c7495b90a8bf2db85d3e085a2c7d02a Signed-off-by:
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Shannon Nelson authored
Instead of silently clamping the descriptor change request into the proper range, fail the request and complain in the log file. Change-Id: Id55ef59255d93c04bedffa8e25fe7ea796c90f32 Signed-off-by:
Shannon Nelson <shannon.nelson@intel.com> Signed-off-by:
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Kamil Krawczyk authored
Add information about current loopback mode to data returned from get_link_info function. Minor fix in set_loopback function and update in loopback types enum. Change-Id: I9d1c540a84ab18eef5ea6429be6331f33fc06aca Signed-off-by:
Kamil Krawczyk <kamil.krawczyk@intel.com> Signed-off-by:
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Shannon Nelson authored
Use the netif_info() macro to restrict messaging to when the HW bit is enabled in the msglvl netdev message mask. Change-Id: I83030d4402991cfb7da100da00f05ce502ada4ae Signed-off-by:
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Rafał Miłecki authored
We were already registering MDIO bus, but we were not connecting bgmac to the PHY. Add proper call and implement adjust link function to switch MAC into requested state. At the same time it's possible to drop our internal PHY management. This is a "standard" PHY, so the "Generic PHY" driver works perfectly fine with this. Don't duplicate the code. Finally make use of phy_ethtool_[gs]set functions instead implementing them from scratch. This change was successfully tested on BCM5357. I was able to autonegotiate 1000Mb/s full duplex, as well as force any of the 10/100/1000 half/full modes. Signed-off-by:
Rafał Miłecki <zajec5@gmail.com> Acked-by:
Florian Fainelli <f.fainelli@gmail.com> Acked-by:
Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Joe Perches authored
If CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is set, several is_<foo>_ether_addr functions can be slightly improved by using u32 dereferences. I believe all current uses of is_zero_ether_addr and is_broadcast_ether_addr are u16 aligned, so always use u16 references to improve those functions performance. Document the u16 alignment requirements. Signed-off-by:
Joe Perches <joe@perches.com> Signed-off-by:
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Joe Perches authored
Use the newly added generic routine ether_addr_equal_unaligned to test if possibly unaligned to u16 Ethernet addresses are equal. This slightly improves comparison time for systems with CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS. Signed-off-by:
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Joe Perches authored
Add a generic routine to test if possibly unaligned to u16 Ethernet addresses are equal. If CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is set, this uses the slightly faster generic routine ether_addr_equal, otherwise this uses memcmp. Signed-off-by:
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David S. Miller authored
Jiri Pirko says: ==================== neigh: respect default parms values This is a long standing regression. But since the patchset is bigger and the regression happened in 2007, I'm proposing this to net-next instead. Basically the problem is that if user wants to use /etc/sysctl.conf to specify default values of neigh related params, he is not able to do that. The reason is that the default values are copied to dev instance right after netdev is registered. And that is way to early. The original behaviour for ipv4 was that this happened after first address was assigned to device. For ipv6 this was apparently from the very beginning. So this patchset basically reverts the behaviour back to what it was in 2007 for ipv4 and changes the behaviour for ipv6 so they are both the same. ==================== Signed-off-by: -
Jiri Pirko authored
Make the behaviour similar to ipv4. This will allow user to set sysctl default neigh param values and these values will be respected even by devices registered before (that ones what do not have address set yet). Signed-off-by:
Jiri Pirko <jiri@resnulli.us> Signed-off-by:
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Jiri Pirko authored
Previously inet devices were only constructed when addresses are added. Therefore the default neigh parms values they get are the ones at the time of these operations. Now that we're creating inet devices earlier, this changes the behaviour of default neigh parms values in an incompatible way (see bug #8519). This patch creates a compromise by setting the default values at the same point as before but only for those that have not been explicitly set by the user since the inet device's creation. Introduced by: commit 8030f544 Author: Herbert Xu <herbert@gondor.apana.org.au> Date: Thu Feb 22 01:53:47 2007 +0900 [IPV4] devinet: Register inetdev earlier. Signed-off-by:
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Jiri Pirko authored
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Jiri Pirko authored
This will be needed later on to provide better management of default values. Signed-off-by:
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Jiri Pirko authored
This patch converts the neigh param members to an array. This allows easier manipulation which will be needed later on to provide better management of default values. Signed-off-by:
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David S. Miller authored
Florian Fainelli says: ==================== net: phy: consolidate PHY reset This patchset consolidates the PHY reset through the MII BMCR register by using a central place were this is done. This patchset resumes the work Kyle Moffett started here: https://lkml.org/lkml/2011/10/20/301 Note that at this point, drivers doing funky things after issuing a PHY reset using phy_init_hw() will still suffer from PHY state machine problems, this will be taken care of later on. ==================== Signed-off-by:
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Florian Fainelli authored
The sh_eth driver issues an uncontrolled PHY reset through the MII register BMCR but fails to wait for the reset to complete, and will also implicitely wipe out all possible PHY fixups applied. Use phy_init_hw() which remedies both problems. Signed-off-by:
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Florian Fainelli authored
Instead of open-coding the PHY reset through MII BMCR, use phy_init_hw() which does that for us and also makes sure that any PHY specific fixups are applied. Signed-off-by:
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Florian Fainelli authored
Instead of open-coding a PHY reset through the MII BMCR register, use phy_init_hw() which does this for us and ensures that PHY device fixups are also applied. We also remove a call to ethernet_phy_reset() which is now unncessary since phy_attach() calls phy_attach_direct() which in turns calls phy_init_hw(). Signed-off-by:
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Florian Fainelli authored
Instead of open-coding a PHY reset through the MII BMCR register, use phy_init_hw() which does that for us and will also make sure that PHY fixups are applied if required. We also remove a call to phy_reset() due to the following sequence of calls in the driver: phy_scan() -> phy_connect() -> phy_connect_direct() -> phy_attach_direct() -> phy_init_hw() and we only have a call to phy_init() after phy_scan(). Signed-off-by:
Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Signed-off-by:
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Florian Fainelli authored
There are quite a lot of drivers touching a PHY device MII_BMCR register to reset the PHY without taking care of: 1) ensuring that BMCR_RESET is cleared after a given timeout 2) the PHY state machine resuming to the proper state and re-applying potentially changed settings such as auto-negotiation Introduce phy_poll_reset() which will take care of polling the MII_BMCR for the BMCR_RESET bit to be cleared after a given timeout or return a timeout error code. In order to make sure the PHY is in a correct state, phy_init_hw() first issues a software reset through MII_BMCR and then applies any fixups. Signed-off-by:
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Florian Fainelli authored
The PHY is already reset during driver probing, and this manual reset after calling phy_start() will wipe out board-specific PHY fixups and driver specific configuration initialization. Remove that explicit PHY reset. Signed-off-by:
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Florian Fainelli authored
In case the greth driver is bound to anything but the Generic PHY driver or the PHY has a special read_status callback implemented, unexpected things will happen. Make sure we that we use phy_read_status() which does the proper abstraction of calling the driver specific read_status() callback for a given PHY. Signed-off-by:
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Florian Fainelli authored
Use phy_init_hw() instead of open-coding it in phy_mii_ioctl(), this improves consistenty and makes sure that we will not duplicate the same routine somewhere else. Signed-off-by:
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Florian Fainelli authored
The PHY library already reads the MII_STAT1000 and MII_LPA registers in genphy_read_status(), so extend it to also populate the PHY device link partner advertised features such that we can feed this back into ethtool when asked for it in phy_ethtool_gset(). Signed-off-by:
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Zhi Yong Wu authored
By checking related codes, it is impossible that ret > len or total_len, so we should remove some useless codes in both above functions. Signed-off-by:
Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Signed-off-by:
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Zhi Yong Wu authored
By checking related codes, it is impossible that ret > len or total_len, so we should remove some useless coeds in both above functions. Signed-off-by:
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Paul Durrant authored
The way that flow control works without this patch is that, in start_xmit() the code uses xenvif_count_skb_slots() to predict how many slots xenvif_gop_skb() will consume and then adds this to a 'req_cons_peek' counter which it then uses to determine if the shared ring has that amount of space available by checking whether 'req_prod' has passed that value. If the ring doesn't have space the tx queue is stopped. xenvif_gop_skb() will then consume slots and update 'req_cons' and issue responses, updating 'rsp_prod' as it goes. The frontend will consume those responses and post new requests, by updating req_prod. So, req_prod chases req_cons which chases rsp_prod, and can never exceed that value. Thus if xenvif_count_skb_slots() ever returns a number of slots greater than xenvif_gop_skb() uses, req_cons_peek will get to a value that req_prod cannot possibly achieve (since it's limited by the 'real' req_cons) and, if this happens enough times, req_cons_peek gets more than a ring size ahead of req_cons and the tx queue then remains stopped forever waiting for an unachievable amount of space to become available in the ring. Having two routines trying to calculate the same value is always going to be fragile, so this patch does away with that. All we essentially need to do is make sure that we have 'enough stuff' on our internal queue without letting it build up uncontrollably. So start_xmit() makes a cheap optimistic check of how much space is needed for an skb and only turns the queue off if that is unachievable. net_rx_action() is the place where we could do with an accurate predicition but, since that has proven tricky to calculate, a cheap worse-case (but not too bad) estimate is all we really need since the only thing we *must* prevent is xenvif_gop_skb() consuming more slots than are available. Without this patch I can trivially stall netback permanently by just doing a large guest to guest file copy between two Windows Server 2008R2 VMs on a single host. Patch tested with frontends in: - Windows Server 2008R2 - CentOS 6.0 - Debian Squeeze - Debian Wheezy - SLES11 Signed-off-by:
Paul Durrant <paul.durrant@citrix.com> Cc: Wei Liu <wei.liu2@citrix.com> Cc: Ian Campbell <ian.campbell@citrix.com> Cc: David Vrabel <david.vrabel@citrix.com> Cc: Annie Li <annie.li@oracle.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Acked-by:
Wei Liu <wei.liu2@citrix.com> Signed-off-by:
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Erik Hugne authored
struct 'tipc_bearer' is a generic representation of the underlying media type, and exists in a one-to-one relationship to each interface TIPC is using. The struct contains a 'blocked' flag that mirrors the operational and execution state of the represented interface, and is updated through notification calls from the latter. The users of tipc_bearer are checking this flag before each attempt to send a packet via the interface. This state mirroring serves no purpose in the current code base. TIPC links will not discover a media failure any faster through this mechanism, and in reality the flag only adds overhead at packet sending and reception. Furthermore, the fact that the flag needs to be protected by a spinlock aggregated into tipc_bearer has turned out to cause a serious and completely unnecessary deadlock problem. CPU0 CPU1 ---- ---- Time 0: bearer_disable() link_timeout() Time 1: spin_lock_bh(&b_ptr->lock) tipc_link_push_queue() Time 2: tipc_link_delete() tipc_bearer_blocked(b_ptr) Time 3: k_cancel_timer(&req->timer) spin_lock_bh(&b_ptr->lock) Time 4: del_timer_sync(&req->timer) I.e., del_timer_sync() on CPU0 never returns, because the timer handler on CPU1 is waiting for the bearer lock. We eliminate the 'blocked' flag from struct tipc_bearer, along with all tests on this flag. This not only resolves the deadlock, but also simplifies and speeds up the data path execution of TIPC. It also fits well into our ongoing effort to make the locking policy simpler and more manageable. An effect of this change is that we can get rid of functions such as tipc_bearer_blocked(), tipc_continue() and tipc_block_bearer(). We replace the latter with a new function, tipc_reset_bearer(), which resets all links associated to the bearer immediately after an interface goes down. A user might notice one slight change in link behaviour after this change. When an interface goes down, (e.g. through a NETDEV_DOWN event) all attached links will be reset immediately, instead of leaving it to each link to detect the failure through a timer-driven mechanism. We consider this an improvement, and see no obvious risks with the new behavior. Signed-off-by:
Erik Hugne <erik.hugne@ericsson.com> Reviewed-by:
Ying Xue <ying.xue@windriver.com> Reviewed-by:
Paul Gortmaker <Paul.Gortmaker@windriver.com> Signed-off-by:
Jon Maloy <jon.maloy@ericsson.com> Signed-off-by:
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wangweidong authored
use pr_<level> instead of printk(LEVEL) Suggested-by:
Wang Weidong <wangweidong1@huawei.com> Signed-off-by:
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Daniel Borkmann authored
This patch introduces a PACKET_QDISC_BYPASS socket option, that allows for using a similar xmit() function as in pktgen instead of taking the dev_queue_xmit() path. This can be very useful when PF_PACKET applications are required to be used in a similar scenario as pktgen, but with full, flexible packet payload that needs to be provided, for example. On default, nothing changes in behaviour for normal PF_PACKET TX users, so everything stays as is for applications. New users, however, can now set PACKET_QDISC_BYPASS if needed to prevent own packets from i) reentering packet_rcv() and ii) to directly push the frame to the driver. In doing so we can increase pps (here 64 byte packets) for PF_PACKET a bit: # CPUs -- QDISC_BYPASS -- qdisc path -- qdisc path[**] 1 CPU == 1,509,628 pps -- 1,208,708 -- 1,247,436 2 CPUs == 3,198,659 pps -- 2,536,012 -- 1,605,779 3 CPUs == 4,787,992 pps -- 3,788,740 -- 1,735,610 4 CPUs == 6,173,956 pps -- 4,907,799 -- 1,909,114 5 CPUs == 7,495,676 pps -- 5,956,499 -- 2,014,422 6 CPUs == 9,001,496 pps -- 7,145,064 -- 2,155,261 7 CPUs == 10,229,776 pps -- 8,190,596 -- 2,220,619 8 CPUs == 11,040,732 pps -- 9,188,544 -- 2,241,879 9 CPUs == 12,009,076 pps -- 10,275,936 -- 2,068,447 10 CPUs == 11,380,052 pps -- 11,265,337 -- 1,578,689 11 CPUs == 11,672,676 pps -- 11,845,344 -- 1,297,412 [...] 20 CPUs == 11,363,192 pps -- 11,014,933 -- 1,245,081 [**]: qdisc path with packet_rcv(), how probably most people seem to use it (hopefully not anymore if not needed) The test was done using a modified trafgen, sending a simple static 64 bytes packet, on all CPUs. The trick in the fast "qdisc path" case, is to avoid reentering packet_rcv() by setting the RAW socket protocol to zero, like: socket(PF_PACKET, SOCK_RAW, 0); Tradeoffs are documented as well in this patch, clearly, if queues are busy, we will drop more packets, tc disciplines are ignored, and these packets are not visible to taps anymore. For a pktgen like scenario, we argue that this is acceptable. The pointer to the xmit function has been placed in packet socket structure hole between cached_dev and prot_hook that is hot anyway as we're working on cached_dev in each send path. Done in joint work together with Jesper Dangaard Brouer. Signed-off-by:Daniel Borkmann <dborkman@redhat.com> Signed-off-by:
Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by:
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Daniel Borkmann authored
As we need it elsewhere, move the inline helper function of skb_needs_linearize() over to skbuff.h include file. While at it, also convert the return to 'bool' instead of 'int' and add a proper kernel doc. Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller authored
Merge 'net' into 'net-next' to get the AF_PACKET bug fix that Daniel's direct transmit changes depend upon. Signed-off-by: -
Daniel Borkmann authored
Commit e40526cb introduced a cached dev pointer, that gets hooked into register_prot_hook(), __unregister_prot_hook() to update the device used for the send path. We need to fix this up, as otherwise this will not work with sockets created with protocol = 0, plus with sll_protocol = 0 passed via sockaddr_ll when doing the bind. So instead, assign the pointer directly. The compiler can inline these helper functions automagically. While at it, also assume the cached dev fast-path as likely(), and document this variant of socket creation as it seems it is not widely used (seems not even the author of TX_RING was aware of that in his reference example [1]). Tested with reproducer from e40526cb. [1] http://wiki.ipxwarzone.com/index.php5?title=Linux_packet_mmap#Example Fixes: e40526cb ("packet: fix use after free race in send path when dev is released") Signed-off-by:
Salam Noureddine <noureddine@aristanetworks.com> Tested-by:
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Eric Dumazet authored
Commit 6da7c8fc ("qdisc: allow setting default queuing discipline") added the ability to change default qdisc from pfifo_fast to say fq But as most modern ethernet devices are multiqueue, we cant really see all the statistics from "tc -s qdisc show", as the default root qdisc is mq. This patch adds the calls to qdisc_list_add() to mq and mqprio Signed-off-by:
Eric Dumazet <edumazet@google.com> Cc: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-nextDavid S. Miller authored
Jeff Kirsher says: ==================== Intel Wired LAN Driver Updates This series contains updates to i40e only. Jacob provides a i40e patch to get 1588 work correctly by separating TSYNVALID and TSYNINDX fields in the receive descriptor. Jesse provides several i40e patches, first to correct the checking of the multi-bit state. The hash is reported correctly in the RSS field if and only if the filter status is 3. Other values of the filter status mean different things and we should not depend on a bitwise result. Then provides a patch to enable a couple of workarounds based on revision ID that allow the driver to work more fully on early hardware. Shannon provides several i40e patches as well. First sets the media type in the hardware structure based on the external connection type. Then provides a patch to only setup the rings that will be used. Lastly provides a fix where the TESTING state was still set when exiting the ethtool diagnostics. Kevin Scott provides one i40e patch to add a new flag to the i40e_add_veb() which allows the driver to request the hardware to filter on layer 2 parameters. Anjali provides four i40e patches, first refactors the reset code in order to re-size queues and vectors while the interface is still up. Then provides a patch to enable all PCTYPEs expect FCoE for RSS. Adds a message to notify the user of how many VFs are initialized on each port. Lastly adds a new variable to track the number of PF instances, this is a global counter on purpose so that each PF loaded has a unique ID. Catherine bumps the driver version. ==================== Signed-off-by: -
Jingoo Han authored
The driver core clears the driver data to NULL after device_release or on probe failure. Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by:
Jingoo Han <jg1.han@samsung.com> Signed-off-by:
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Jingoo Han authored
The driver core clears the driver data to NULL after device_release or on probe failure. Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by:
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