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2014-11-05net: Add and use skb_copy_datagram_msg() helper.David S. Miller43-57/+58
This encapsulates all of the skb_copy_datagram_iovec() callers with call argument signature "skb, offset, msghdr->msg_iov, length". When we move to iov_iters in the networking, the iov_iter object will sit in the msghdr. Having a helper like this means there will be less places to touch during that transformation. Based upon descriptions and patch from Al Viro. Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-05Merge branch 'gue-next'David S. Miller15-118/+565
Tom Herbert says: ==================== gue: Remote checksum offload This patch set implements remote checksum offload for GUE, which is a mechanism that provides checksum offload of encapsulated packets using rudimentary offload capabilities found in most Network Interface Card (NIC) devices. The outer header checksum for UDP is enabled in packets and, with some additional meta information in the GUE header, a receiver is able to deduce the checksum to be set for an inner encapsulated packet. Effectively this offloads the computation of the inner checksum. Enabling the outer checksum in encapsulation has the additional advantage that it covers more of the packet than the inner checksum including the encapsulation headers. Remote checksum offload is described in: http://tools.ietf.org/html/draft-herbert-remotecsumoffload-01 The GUE transmit and receive paths are modified to support the remote checksum offload option. The option contains a checksum offset and checksum start which are directly derived from values set in stack when doing CHECKSUM_PARTIAL. On receipt of the option, the operation is to calculate the packet checksum from "start" to end of the packet (normally derived for checksum complete), and then set the resultant value at checksum "offset" (the checksum field has already been primed with the pseudo header). This emulates a NIC that implements NETIF_F_HW_CSUM. The primary purpose of this feature is to eliminate cost of performing checksum calculation over a packet when encpasulating. In this patch set: - Move fou_build_header into fou.c and split it into a couple of functions - Enable offloading of outer UDP checksum in encapsulation - Change udp_offload to support remote checksum offload, includes new GSO type and ensuring encapsulated layers (TCP) doesn't try to set a checksum covered by RCO - TX support for RCO with GUE. This is configured through ip_tunnel and set the option on transmit when packet being encapsulated is CHECKSUM_PARTIAL - RX support for RCO with GUE for normal and GRO paths. Includes resolving the offloaded checksum v2: Address comments from davem: Move accounting for private option field in gue_encap_hlen to patch in which we add the remote checksum offload option. Testing: I ran performance numbers using netperf TCP_STREAM and TCP_RR with 200 streams, comparing GUE with and without remote checksum offload (doing checksum-unnecessary to complete conversion in both cases). These were run on mlnx4 and bnx2x. Some mlnx4 results are below. GRE/GUE TCP_STREAM IPv4, with remote checksum offload 9.71% TX CPU utilization 7.42% RX CPU utilization 36380 Mbps IPv4, without remote checksum offload 12.40% TX CPU utilization 7.36% RX CPU utilization 36591 Mbps TCP_RR IPv4, with remote checksum offload 77.79% CPU utilization 91/144/216 90/95/99% latencies 1.95127e+06 tps IPv4, without remote checksum offload 78.70% CPU utilization 89/152/297 90/95/99% latencies 1.95458e+06 tps IPIP/GUE TCP_STREAM With remote checksum offload 10.30% TX CPU utilization 7.43% RX CPU utilization 36486 Mbps Without remote checksum offload 12.47% TX CPU utilization 7.49% RX CPU utilization 36694 Mbps TCP_RR With remote checksum offload 77.80% CPU utilization 87/153/270 90/95/99% latencies 1.98735e+06 tps Without remote checksum offload 77.98% CPU utilization 87/150/287 90/95/99% latencies 1.98737e+06 tps SIT/GUE TCP_STREAM With remote checksum offload 9.68% TX CPU utilization 7.36% RX CPU utilization 35971 Mbps Without remote checksum offload 12.95% TX CPU utilization 8.04% RX CPU utilization 36177 Mbps TCP_RR With remote checksum offload 79.32% CPU utilization 94/158/295 90/95/99% latencies 1.88842e+06 tps Without remote checksum offload 80.23% CPU utilization 94/149/226 90/95/99% latencies 1.90338e+06 tps VXLAN TCP_STREAM 35.03% TX CPU utilization 20.85% RX CPU utilization 36230 Mbps TCP_RR 77.36% CPU utilization 84/146/270 90/95/99% latencies 2.08063e+06 tps We can also look at CPU time in csum_partial using perf (with bnx2x setup). For GRE with TCP_STREAM I see: With remote checksum offload 0.33% TX 1.81% RX Without remote checksum offload 6.00% TX 0.51% RX I suspect the fact that time in csum_partial noticably increases with remote checksum offload for RX is due to taking the cache miss on the encapsulated header in that function. By similar reasoning, if on the TX side the packet were not in cache (say we did a splice from a file whose data was never touched by the CPU) the CPU savings for TX would probably be more pronounced. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-05gue: Receive side of remote checksum offloadTom Herbert1-9/+161
Add processing of the remote checksum offload option in both the normal path as well as the GRO path. The implements patching the affected checksum to derive the offloaded checksum. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-05gue: TX support for using remote checksum offload optionTom Herbert3-4/+46
Add if_tunnel flag TUNNEL_ENCAP_FLAG_REMCSUM to configure remote checksum offload on an IP tunnel. Add logic in gue_build_header to insert remote checksum offload option. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-05gue: Protocol constants for remote checksum offloadTom Herbert1-1/+4
Define a private flag for remote checksun offload as well as a length for the option. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-05udp: Changes to udp_offload to support remote checksum offloadTom Herbert9-6/+29
Add a new GSO type, SKB_GSO_TUNNEL_REMCSUM, which indicates remote checksum offload being done (in this case inner checksum must not be offloaded to the NIC). Added logic in __skb_udp_tunnel_segment to handle remote checksum offload case. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-05gue: Add infrastructure for flags and optionsTom Herbert2-53/+189
Add functions and basic definitions for processing standard flags, private flags, and control messages. This includes definitions to compute length of optional fields corresponding to a set of flags. Flag validation is in validate_gue_flags function. This checks for unknown flags, and that length of optional fields is <= length in guehdr hlen. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-05udp: Offload outer UDP tunnel csum if availableTom Herbert1-16/+36
In __skb_udp_tunnel_segment if outer UDP checksums are enabled and ip_summed is not already CHECKSUM_PARTIAL, set up checksum offload if device features allow it. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-05net: Move fou_build_header into fou.c and refactorTom Herbert4-49/+120
Move fou_build_header out of ip_tunnel.c and into fou.c splitting it up into fou_build_header, gue_build_header, and fou_build_udp. This allows for other users for TX of FOU or GUE. Change ip_tunnel_encap to call fou_build_header or gue_build_header based on the tunnel encapsulation type. Similarly, added fou_encap_hlen and gue_encap_hlen functions which are called by ip_encap_hlen. New net/fou.h has prototypes and defines for this. Added NET_FOU_IP_TUNNELS configuration. When this is set, IP tunnels can use FOU/GUE and fou module is also selected. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-05Merge branch 'stmmac-next'David S. Miller6-97/+16
Giuseppe Cavallaro says: ==================== stmmac: review driver Koptions Recently many Koption options have been added to have new glue logic on several platforms. The main goal behind this work is to guarantee that the driver built fine on all the branches where it is present independently of which glue logic is selected. IMHO, it is better to remove all the not necessary Koption(s) that can hide build problems when something changes in the driver and especially when the DT compatibility allows us to manage all the platform data. I compiled the driver w/o any issue on net-next Git for: x86, arm and sh4. In case of there are build problems on some repos now it will be easy to catch them and cherry-pick patches from mainstream. For sure, do not hesitate to contact me in case of issue. Also this set removes STMMAC_DEBUG_FS and BUS_MODE_DA. The latter is useless and the former can be replaced by DEBUG_FS (always to make safe the build). V2: patch-set re-based on top of the latest updates for net-next ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-05stmmac: remove BUS_MODE_DAGiuseppe CAVALLARO2-14/+0
This is a very old and often unused option to configure a bit in a register inside the DMA. This support should not stay under Koption and should be extended for new chips too. This will be do later maybe via device-tree parameters. Also no performance impact when remove this setting on STi platforms. Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-05stmmac: remove STMMAC_DEBUG_FSGiuseppe CAVALLARO2-15/+7
the STMMAC_DEBUG_FS Koption is now removed from the driver configuration and this support will be built by default when DEBUG_FS is present. This can also be useful on building driver verification. Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-05stmmac: remove specific SoC Koption from platform.Giuseppe CAVALLARO4-68/+9
This patch removes all the Koptions added to build the glue-logic files for all different architectures: DWMAC_MESON, DWMAC_SUNXI, DWMAC_STI ... Nowadays the stmmac needs to be compiled on several platforms; in some case it very convenient to guarantee that its build is always completed with success on all the branches where the driver is present. Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04net: phy: spi_ks8995: remove sysfs bin file by registered attributeVladimir Zapolskiy1-1/+3
When a sysfs binary file is asked to be removed, it is found by attribute name, so strictly speaking this change is not a fix, but just in case when attribute name is changed in the driver or sysfs internals are changed, it might be better to remove the previously created file using right the same binary attribute. Signed-off-by: Vladimir Zapolskiy <vz@mleia.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: David S. Miller <davem@davemloft.net> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04udp: remove blank line between set and testFabian Frederick1-1/+0
Suggested-by: Joe Perches <joe@perches.com> Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04ipv6: trivial, add bracket for the if blockFlorent Fourcot1-2/+2
The "else" block is on several lines and use bracket. Signed-off-by: Florent Fourcot <florent.fourcot@enst-bretagne.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04esp4: remove assignment in if conditionFabian Frederick1-1/+3
Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04Merge branch 'ecn_via_routing_table'David S. Miller5-44/+87
Florian Westphal says: ==================== net: allow setting ecn via routing table Here is v4 of the patchset, its exactly the same as v3 except in patch3/3 where I added the missing 'const' qualifier to a function argument that Eric spotted during review. I preserved Erics Acks so that he doesn't have to resend them. v3 cover letter: When using syn cookies, then do not simply trust that the echoed timestamp was not modified to make sure that ecn is not turned on magically when it is disabled on the host. The first two patches, which were not part of earlier series, prepare the cookie code for the ecn route metrics change by allowing is to more easily use the existing dst object for ecn validation. The 3rd patch adds the ecn route metric feature support. It is almost the same as in v2, except that we'll now also test the dst_features when decoding a syn cookie timestamp that indicates ecn support. These three patches then allow turning on explicit congestion notification based on the destination network. For example, assuming the default tcp_ecn sysctl '2', the following will enable ecn (tcp_ecn=1 behaviour, i.e. request ecn to be enabled for a tcp connection) for all connections to hosts inside the 192.168.2/24 network: ip route change 192.168.2.0/24 dev eth0 features ecn Having a more fine-grained per-route setting can be beneficial for various reasons, for example 1) within data centers, or 2) local ISPs may deploy ECN support for their own video/streaming services [1], etc. Joint work with Daniel Borkmann, feature suggested by Hannes Frederic Sowa. The patch to enable this in iproute2 will be posted shortly, it is currently also available here: http://git.breakpoint.cc/cgit/fw/iproute2.git/commit/?h=iproute_features&id=8843d2d8973fb81c78a7efe6d42e3a17d739003e [1] http://www.ietf.org/proceedings/89/slides/slides-89-tsvarea-1.pdf, p.15 ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04net: allow setting ecn via routing tableFlorian Westphal5-17/+31
This patch allows to set ECN on a per-route basis in case the sysctl tcp_ecn is not set to 1. In other words, when ECN is set for specific routes, it provides a tcp_ecn=1 behaviour for that route while the rest of the stack acts according to the global settings. One can use 'ip route change dev $dev $net features ecn' to toggle this. Having a more fine-grained per-route setting can be beneficial for various reasons, for example, 1) within data centers, or 2) local ISPs may deploy ECN support for their own video/streaming services [1], etc. There was a recent measurement study/paper [2] which scanned the Alexa's publicly available top million websites list from a vantage point in US, Europe and Asia: Half of the Alexa list will now happily use ECN (tcp_ecn=2, most likely blamed to commit 255cac91c3 ("tcp: extend ECN sysctl to allow server-side only ECN") ;)); the break in connectivity on-path was found is about 1 in 10,000 cases. Timeouts rather than receiving back RSTs were much more common in the negotiation phase (and mostly seen in the Alexa middle band, ranks around 50k-150k): from 12-thousand hosts on which there _may_ be ECN-linked connection failures, only 79 failed with RST when _not_ failing with RST when ECN is not requested. It's unclear though, how much equipment in the wild actually marks CE when buffers start to fill up. We thought about a fallback to non-ECN for retransmitted SYNs as another global option (which could perhaps one day be made default), but as Eric points out, there's much more work needed to detect broken middleboxes. Two examples Eric mentioned are buggy firewalls that accept only a single SYN per flow, and middleboxes that successfully let an ECN flow establish, but later mark CE for all packets (so cwnd converges to 1). [1] http://www.ietf.org/proceedings/89/slides/slides-89-tsvarea-1.pdf, p.15 [2] http://ecn.ethz.ch/ Joint work with Daniel Borkmann. Reference: http://thread.gmane.org/gmane.linux.network/335797 Suggested-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04syncookies: split cookie_check_timestamp() into two functionsFlorian Westphal3-18/+27
The function cookie_check_timestamp(), both called from IPv4/6 context, is being used to decode the echoed timestamp from the SYN/ACK into TCP options used for follow-up communication with the peer. We can remove ECN handling from that function, split it into a separate one, and simply rename the original function into cookie_decode_options(). cookie_decode_options() just fills in tcp_option struct based on the echoed timestamp received from the peer. Anything that fails in this function will actually discard the request socket. While this is the natural place for decoding options such as ECN which commit 172d69e63c7f ("syncookies: add support for ECN") added, we argue that in particular for ECN handling, it can be checked at a later point in time as the request sock would actually not need to be dropped from this, but just ECN support turned off. Therefore, we split this functionality into cookie_ecn_ok(), which tells us if the timestamp indicates ECN support AND the tcp_ecn sysctl is enabled. This prepares for per-route ECN support: just looking at the tcp_ecn sysctl won't be enough anymore at that point; if the timestamp indicates ECN and sysctl tcp_ecn == 0, we will also need to check the ECN dst metric. This would mean adding a route lookup to cookie_check_timestamp(), which we definitely want to avoid. As we already do a route lookup at a later point in cookie_{v4,v6}_check(), we can simply make use of that as well for the new cookie_ecn_ok() function w/o any additional cost. Joint work with Daniel Borkmann. Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04syncookies: avoid magic values and document which-bit-is-what-optionFlorian Westphal1-15/+35
Was a bit more difficult to read than needed due to magic shifts; add defines and document the used encoding scheme. Joint work with Daniel Borkmann. Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04igmp: remove camel case definitionsFabian Frederick1-14/+14
use standard uppercase for definitions Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04udp: remove else after returnFabian Frederick1-6/+6
else is unnecessary after return 0 in __udp4_lib_rcv() Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04inet: frags: remove inline on static in c fileFabian Frederick1-8/+8
remove __inline__ / inline and let compiler decide what to do with static functions Inspired-by: "David S. Miller" <davem@davemloft.net> Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04ipv4: remove 0/NULL assignment on staticFabian Frederick1-8/+8
static values are automatically initialized to 0 Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04ipv4: use seq_puts instead of seq_printf where possibleFabian Frederick1-3/+3
Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04tcp: spelling s/plugable/pluggableFabian Frederick1-1/+1
Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04cipso: remove NULL assignment on staticFabian Frederick1-1/+3
Also add blank line after structure declarations Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04ipv4: include linux/bug.h instead of asm/bug.hFabian Frederick1-1/+1
Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-04cipso: kerneldoc warning fixFabian Frederick1-1/+1
Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-03net: add rbnode to struct sk_buffEric Dumazet2-27/+20
Yaogong replaces TCP out of order receive queue by an RB tree. As netem already does a private skb->{next/prev/tstamp} union with a 'struct rb_node', lets do this in a cleaner way. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Yaogong Wang <wygivan@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-03Merge branch 'master' of ↵David S. Miller6-117/+51
git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-next Jeff Kirsher says: ==================== Intel Wired LAN Driver Updates 2014-11-03 This series contains updates to i40e and i40evf. Akeem adds a check for i40e so that flow director flush and reinit are not done when flow director is not enabled. Mitch fixes the i40evf driver to properly handle multiple admin queue messages, by reinit the msg_size field each time we go through the loop. Without this, we may receive truncated messages due to the firmware thinking we have insufficient buffer size. Also fixes the link checking logic to only check the carrier state if the interface is actually open, which allows link changes to be reported correctly without spamming the VFs. Updates i40e to inset the VSI ID in the QTX_CTL register when configuring queues for VMDq VSIs. Paul adds support for 10G-base-T in i40evf. Jesse fixes i40e where the call to irq_dynamic_disable() was turning off the interrupt completely when trying to set ITR to 0 (for lowest moderation). Shannon removes debugfs dump stats function, since it was not being kept up-to-date and was redundant with the ethtool output. Also, scales back the LAN MSIx usage to force queue/vector sharing and leave some vectors for Flow Director, VMDq, etc. when there are more cores than vectors available to the PF. Cleans up the error reporting for get_lump() resource tracking errors. Also adds a check for the debug module parameter earlier to be able to catch the early configuration phase admin queue messages. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-03hamradio: 6pack: remove unnecessary checkSudip Mukherjee1-2/+1
this is check for dev is unnecessary, as we are already checking dev after allocating it via alloc_netdev, and jumping to label: out if it is NULL. Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-03PPC: bpf_jit_comp: add SKF_AD_PKTTYPE instructionDenis Kirjanov3-0/+13
Add BPF extension SKF_AD_PKTTYPE to ppc JIT to load skb->pkt_type field. Before: [ 88.262622] test_bpf: #11 LD_IND_NET 86 97 99 PASS [ 88.265740] test_bpf: #12 LD_PKTTYPE 109 107 PASS After: [ 80.605964] test_bpf: #11 LD_IND_NET 44 40 39 PASS [ 80.607370] test_bpf: #12 LD_PKTTYPE 9 9 PASS CC: Alexei Starovoitov<alexei.starovoitov@gmail.com> CC: Michael Ellerman<mpe@ellerman.id.au> Cc: Matt Evans <matt@ozlabs.org> Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org> v2: Added test rusults Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-03Merge branch 'mlx4-next'David S. Miller9-26/+190
Or Gerlitz says: ==================== Mellanox ethernet driver update Oct-30-2014 The 1st patch from Saeed fixes a bug in the last net-next batch where a VF could get access to set port configuration, the next patch from Amir fixes a race in the port VPI logic. Next are two performance patches from Ido. The patch to add checksum complete status on GRE and such packets was preceded with a patch that converted the driver to only use napi_gro_receive vs. the current code which goes through napi_gro_frags on it's usual track. Eric D. has some thoughts and suggestions on that change for which we want to take the time and consider, so for the time being dropped that patch and the ones that depend on it. Changes from V0: - have the caller to provide the __GFP_COLD hint to the service function - dropped the patch that changes the GRO logic and the subsequent dependent patches. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-03net/mlx4_core: Add retrieval of CONFIG_DEV parametersMatan Barak6-7/+139
Add code to issue CONFIG_DEV "get" firmware command. This command is used in order to obtain certain parameters used for supporting various RX checksumming options and vxlan UDP port. The GET operation is allowed for VFs too. Signed-off-by: Matan Barak <matanb@mellanox.com> Signed-off-by: Shani Michaeli <shanim@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-03net/mlx4_en: Add __GFP_COLD gfp flags in alloc_pagesIdo Shamay1-3/+4
Needed in order to get cache cold pages (L3 flushed) for HW scatter. Otherwise memory may flush those entries when the packet comes from PCI, causing back pressure resulting in BW decrease. Signed-off-by: Ido Shamay <idos@mellanox.com> Signed-off-by: Amir Vadai <amirv@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-03net/mlx4_en: Remove RX buffers alignment to IP_ALIGNIdo Shamay2-13/+4
When IP_ALIGN has a non zero value, hardware will write to a non aligned address. The only reader from this address is when copying the header from the first frag into the linear buffer (further access to the IP address will be from the linear buffer, in which the headers are aligned). Since the penalty of non align access by the hardware is greater than the software memcpy, changing the frag_align to always be 0. Signed-off-by: Ido Shamay <idos@mellanox.com> Signed-off-by: Amir Vadai <amirv@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-03net/mlx4_core: Protect port type setting by mutexAmir Vadai1-1/+8
We need to protect set_port_type() for concurrency, as the sysfs code could call it from mutliple contexts in parallel. The port_mutex is not enough because we need to protect from concurrent modification of 'info' and stopping of the port sensing work. Signed-off-by: Amir Vadai <amirv@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-03net/mlx4_core: Prevent VF from changing port configurationSaeed Mahameed3-2/+35
Added wrapper to the ACCESS_REG command for handling guest HW registers access, preventing write operations, but do allow reads. This will prevent SRIOV guests to change port PTYS configuration, such as speed/advertised link modes. Fixes: adbc7ac5c15e ('net/mlx4_core: Introduce ACCESS_REG CMD [...]') Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Amir Vadai <amirv@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-03net: less interrupt masking in NAPIEric Dumazet1-25/+43
net_rx_action() can mask irqs a single time to transfert sd->poll_list into a private list, for a very short duration. Then, napi_complete() can avoid masking irqs again, and net_rx_action() only needs to mask irq again in slow path. This patch removes 2 couples of irq mask/unmask per typical NAPI run, more if multiple napi were triggered. Note this also allows to give control back to caller (do_softirq()) more often, so that other softirq handlers can be called a bit earlier, or ksoftirqd can be wakeup earlier under pressure. This was developed while testing an alternative to RX interrupt mitigation to reduce latencies while keeping or improving GRO aggregation on fast NIC. Idea is to test napi->gro_list at the end of a napi->poll() and reschedule one NAPI poll, but after servicing a full round of softirqs (timers, TX, rcu, ...). This will be allowed only if softirq is currently serviced by idle task or ksoftirqd, and resched not needed. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-03net: shrink struct softnet_dataEric Dumazet1-7/+8
flow_limit in struct softnet_data is only read from local cpu and can be moved to fill a hole, reducing softnet_data size by 64 bytes on x86_64 While we are at it, move output_queue, output_queue_tailp and completion_queue, so that rx / tx paths touch a single cache line. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-03i40e: properly parse MDET registersMitch Williams1-5/+7
Fix a few problems with our parsing of the MDET registers: * Queue IDs are longer than 8 bits * Queue IDs are absolute for the device and the base queue must be subtracted out. * VF IDs are longer than 8 bits * Use the MASK define to mask the event value, instead of the SHIFT define. Change-ID: I3dc7237f480c02e1192a2a8ea782f8a02ab2a8b7 Reported-by: Marc Neustadter <marc.neustadter@intel.com> Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Signed-off-by: Patrick Lu <patrick.lu@intel.com> Tested-by: Jim Young <jamesx.m.young@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2014-11-03i40e: configure VM ID in qtx_ctlMitch Williams1-2/+6
We must insert the VSI ID in the QTX_CTL register when configuring queues for VMDQ VSIs. Change-ID: Iedfe36bd42ca0adc90a7cc2b7cf04795a98f4761 Reported-by: Marc Neustadter <marc.neustadter@intel.com> Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Signed-off-by: Patrick Lu <patrick.lu@intel.com> Tested-by: Jim Young <jamesx.m.young@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2014-11-03i40e: enable debug earlierShannon Nelson1-0/+5
Check the debug module parameter earlier to be able to catch the early configuration phase adminq messages. Change-ID: Ic84fabd72393489bbf96042de770790a80fd8468 Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Signed-off-by: Patrick Lu <patrick.lu@intel.com> Tested-by: Jim Young <jamesx.m.young@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2014-11-03i40e: better wording for resource tracking errorsShannon Nelson1-6/+8
Tweak and homogenize the error reporting for get_lump() resource tracking errors. Change-ID: I11330161cc6ad8d04371c499c63071c816171c3b Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Signed-off-by: Patrick Lu <patrick.lu@intel.com> Tested-by: Jim Young <jamesx.m.young@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2014-11-03i40e: scale msix vector use when more cores than vectorsShannon Nelson1-4/+7
When there are more cores than vectors available to the PF, scale back the LAN msix usage to force queue/vector sharing and leave some vectors for Flow Director, VMDq, etc. Change-ID: Ie0317732eb85ad8d851d7da7d9af86b1bf8c21ad Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Signed-off-by: Patrick Lu <patrick.lu@intel.com> Tested-by: Jim Young <jamesx.m.young@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2014-11-03i40e: remove debugfs dump statsShannon Nelson1-91/+2
The debugfs dump stats wasn't being kept up-to-date, was redundant with the ethtool output, and didn't offer any useful additional info. Rather than continue trying to keep them aligned, just remove the debugfs command. Change-ID: Id130ed9aef01c6369ab662c7b4c5ec5b1dbc5b40 Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Signed-off-by: Patrick Lu <patrick.lu@intel.com> Tested-by: Jim Young <Jamesx.m.young@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2014-11-03i40e: avoid disable of interrupt when changing ITRJesse Brandeburg1-2/+0
The call to irq_dynamic_disable was turning off the interrupt completely when trying to set ITR to 0 (for lowest moderation). Just remove the call as setting the values to 0 later in this function will suffice. Change-ID: I47caf1ecbe65653cf63ec833db93094cd83fd84d Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by: Patrick Lu <patrick.lu@intel.com> Tested-By: Jim Young <jamesx.m.young@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2014-11-03i40evf: Add support for 10G base T partsPaul M Stillwell Jr2-0/+2
Add 10G-Base-T support in i40evf. Change-ID: I98a1c3138d7d6572fe7903a7c1c4692cae3260d5 Signed-off-by: Paul M Stillwell Jr <paul.m.stillwell.jr@intel.com> Signed-off-by: Patrick Lu <patrick.lu@intel.com> Tested-by: Jim Young <jamesx.m.young@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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