1. 01 Aug, 2017 8 commits
  2. 31 Jul, 2017 32 commits
    • Marc Gonzalez's avatar
      net: phy: Log only PHY state transitions · 6a95befc
      Marc Gonzalez authored
      In the current code, old and new PHY states are always logged.
      >From now on, log only PHY state transitions.
      Signed-off-by: default avatarMarc Gonzalez <marc_gonzalez@sigmadesigns.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6a95befc
    • David S. Miller's avatar
      Merge branch 'mlxsw-Various-small-fixes' · 6e729175
      David S. Miller authored
      Jiri Pirko says:
      
      ====================
      mlxsw: Various small fixes
      
      This patch series is to contribute several fixes for nits that I noticed while
      working on mlxsw. The changes range from typo fixes to local improvements of
      the code and have little in common besides being small in scope.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6e729175
    • Petr Machata's avatar
      mlxsw: spectrum_router: Simplify a piece of code · 213666a3
      Petr Machata authored
      Express the same logic more succinctly.
      Signed-off-by: default avatarPetr Machata <petrm@mellanox.com>
      Reviewed-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      213666a3
    • Petr Machata's avatar
      mlxsw: spectrum_router: Clarify a piece of code · 56b8a9ed
      Petr Machata authored
      Prefer logical operator that expresses the intent to bitwise one that
      happens to give the same result.
      Signed-off-by: default avatarPetr Machata <petrm@mellanox.com>
      Reviewed-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      56b8a9ed
    • Petr Machata's avatar
    • Petr Machata's avatar
      mlxsw: reg.h: Namespace IP2ME registers · 83930cd7
      Petr Machata authored
      This renames IP2ME-specific registers reg_ralue_v and
      reg_ralue_tunnel_ptr to reg_ralue_ip2me_*.
      Signed-off-by: default avatarPetr Machata <petrm@mellanox.com>
      Reviewed-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      83930cd7
    • Petr Machata's avatar
      mlxsw: Update specification of reg_ritr_type · 78676ad4
      Petr Machata authored
      The comments really belong to the individual enumerators. The comment
      at the register should instead reference the enum.
      Signed-off-by: default avatarPetr Machata <petrm@mellanox.com>
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      78676ad4
    • Petr Machata's avatar
      8de3c178
    • Petr Machata's avatar
      mlxsw: reg.h: Fix a typo · 806a1c1a
      Petr Machata authored
      Signed-off-by: default avatarPetr Machata <petrm@mellanox.com>
      Reviewed-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      806a1c1a
    • Petr Machata's avatar
      mlxsw: spectrum_acl: Fix a typo · 4bb51bd6
      Petr Machata authored
      Signed-off-by: default avatarPetr Machata <petrm@mellanox.com>
      Reviewed-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4bb51bd6
    • David S. Miller's avatar
      Merge branch 'bcmgenet-utilize-MDIO-unimac-driver' · 73a1ff59
      David S. Miller authored
      Florian Fainelli says:
      
      ====================
      net: bcmgenet: utilize MDIO unimac driver
      
      This patch series migrates the Broadcom GENET driver to use the mdio-bcm-unimac
      driver. This MDIO HW is the same as the one GENET internally embedds, yet for
      historical reasons the two drivers lived their own lives. Because of the GENET
      interrupt situation, we let it specify how it wants to signal MDIO operations
      completion using its driver-private waitqueue.
      
      The diffstat is not super impressive, but it's still negative! This would
      make it easier in the future to absorb possible workarounds/bugs/features
      within the same location.
      
      This was tested on BCM7260 (GENETv5, single instance), BCM7439 (GENETv4, triple
      instance) and BCM7445 (bcm_sf2 + mdio-bcm-unimac).
      
      We also now have a nice /proc/iomem output:
      
      f0b00000-f0b0fc4b : /rdb/ethernet@f0b00000
        f0b00e14-f0b00e1c : unimac-mdio.0
      f0b20000-f0b2fc4b : /rdb/ethernet@f0b20000
        f0b20e14-f0b20e1c : unimac-mdio.1
      f0b40000-f0b4fc4b : /rdb/ethernet@f0b40000
        f0b40e14-f0b40e1c : unimac-mdio.2
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      73a1ff59
    • Florian Fainelli's avatar
      net: bcmgenet: Utilize bcmgenet_mii_exit() for error path · 6f24b85e
      Florian Fainelli authored
      bcmgenet_mii_init() has an error path which is strictly identical to the
      unwinding that bcmgenet_mii_exit() does, so have bcmgenet_mii_init()
      utilize bcmgenet_mii_exit() for that.
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6f24b85e
    • Florian Fainelli's avatar
      net: bcmgenet: Drop legacy MDIO code · 2b13c3ae
      Florian Fainelli authored
      Now that we have fully migrated to the mdio-bcm-unimac driver, drop the
      legacy MDIO bus code which did duplicate a fair amount of code.
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2b13c3ae
    • Florian Fainelli's avatar
      net: bcmgenet: utilize generic Broadcom UniMAC MDIO controller driver · 9a4e7969
      Florian Fainelli authored
      Update the GENET driver to register an UniMAC MDIO bus controller for
      the GENET internal MDIO bus, update the platform data code to attach the
      PHY to the correct MDIO bus controller.
      
      The Device Tree portion of the code is mostly left unmodified since the
      lookup/binding is done via phandles and Device Tree nodes which are much
      more flexible in locating and binding PHYs to their respective MDIO bus
      controllers.
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9a4e7969
    • Florian Fainelli's avatar
      net: phy: mdio-bcm-unimac: Allow specifying platform data · f248aff8
      Florian Fainelli authored
      In preparation for having the bcmgenet driver migrate over the
      mdio-bcm-unimac driver, add a platform data structure which allows
      passing integrating specific details like bus name, wait function to
      complete MDIO operations and PHY mask.
      
      We also define what the platform device name contract is by defining
      UNIMAC_MDIO_DRV_NAME and moving it to the platform_data header.
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f248aff8
    • Florian Fainelli's avatar
      net: phy: mdio-bcm-unimac: Add debug print for PHY workaround · e23597f7
      Florian Fainelli authored
      In order to be stricly identical to what bcmgenet does, add a debug
      print when a PHY workaround during bus->reset() is executed. Preliminary
      change to moving bcmgenet towards mdio-bcm-unimac.
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      e23597f7
    • Florian Fainelli's avatar
      net: phy: mdio-bcm-unimac: create unique bus names · d782f7c9
      Florian Fainelli authored
      In preparation for having multiple GENET instances in a system (up to
      3), make sure that we do include the bus instance number in the name of
      the MDIO bus such that we change it from "unimac-mdio" to
      "unimac-mdio-0" for instance.
      
      So far, the only user of this driver is using Device Tree, which uses a
      lookup/parenting based technique to map PHY devices to their respective
      MDIO bus controllers, hence causing no additional changes.
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d782f7c9
    • Florian Fainelli's avatar
      net: phy: mdio-bcm-unimac: factor busy polling loop · 69a60b05
      Florian Fainelli authored
      Factor the code that does the busy polling on the MDIO_BUSY bit since we
      will have different code-paths for for completion depending on whether
      we are using interrupts or polling.
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      69a60b05
    • David S. Miller's avatar
      Merge branch 'tcp-remove-prequeue-and-header-prediction' · 834e0ecf
      David S. Miller authored
      Florian Westphal says:
      
      ====================
      tcp: remove prequeue and header prediction
      
      During a hallway discussion with Eric Dumazet at Netdev 1.2 in
      Tokyo some maybe-not-so-useful-anymore TCP stack features came up,
      among these header prediction and prequeueing.
      
      In brief, TCP prequeue assumes a single-process-blocking-read design,
      which is not that common anymore. The most frequently used high-performance
      networking program that is an excellent fit for these features is netperf.
      
      The idea behind prequeueing is to move part of tcp processing, including
      retransmit queue cleaning, to process context.
      
      With (e)poll designs, prequeue is always skipped, so for such programs
      this is dead-code removal.
      
      Header prediction is also less useful nowadays.
      For packet trains, GRO will do packet aggregation so we do not get the
      per-packet benefit that this had before GRO anymore.
      
      Because of SACK, header prediction also will be ineffective once
      a connection suffers even light packet losses.
      
      code removal aside, after this change processing always occurs in BH
      context, this allows to experiment e.g. with doing bulk freeing of
      skb heads when incoming ACKs clean packets from the retransmit queue.
      
      There are no changes since the RFC, except in last patch (i missed
      another no-longer-used mib counter). I also edited a few commit messages.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      834e0ecf
    • Florian Westphal's avatar
      tcp: remove unused mib counters · 3282e655
      Florian Westphal authored
      was used by tcp prequeue and header prediction.
      TCPFORWARDRETRANS use was removed in january.
      Signed-off-by: default avatarFlorian Westphal <fw@strlen.de>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      3282e655
    • Florian Westphal's avatar
      tcp: remove CA_ACK_SLOWPATH · 573aeb04
      Florian Westphal authored
      re-indent tcp_ack, and remove CA_ACK_SLOWPATH; it is always set now.
      Signed-off-by: default avatarFlorian Westphal <fw@strlen.de>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      573aeb04
    • Florian Westphal's avatar
      tcp: remove header prediction · 45f119bf
      Florian Westphal authored
      Like prequeue, I am not sure this is overly useful nowadays.
      
      If we receive a train of packets, GRO will aggregate them if the
      headers are the same (HP predates GRO by several years) so we don't
      get a per-packet benefit, only a per-aggregated-packet one.
      Signed-off-by: default avatarFlorian Westphal <fw@strlen.de>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      45f119bf
    • Florian Westphal's avatar
      tcp: remove low_latency sysctl · b6690b14
      Florian Westphal authored
      Was only checked by the removed prequeue code.
      Signed-off-by: default avatarFlorian Westphal <fw@strlen.de>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b6690b14
    • Florian Westphal's avatar
      tcp: reindent two spots after prequeue removal · c13ee2a4
      Florian Westphal authored
      These two branches are now always true, remove the conditional.
      objdiff shows no changes.
      Signed-off-by: default avatarFlorian Westphal <fw@strlen.de>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c13ee2a4
    • Florian Westphal's avatar
      tcp: remove prequeue support · e7942d06
      Florian Westphal authored
      prequeue is a tcp receive optimization that moves part of rx processing
      from bh to process context.
      
      This only works if the socket being processed belongs to a process that
      is blocked in recv on that socket.
      
      In practice, this doesn't happen anymore that often because nowadays
      servers tend to use an event driven (epoll) model.
      
      Even normal client applications (web browsers) commonly use many tcp
      connections in parallel.
      
      This has measureable impact only in netperf (which uses plain recv and
      thus allows prequeue use) from host to locally running vm (~4%), however,
      there were no changes when using netperf between two physical hosts with
      ixgbe interfaces.
      Signed-off-by: default avatarFlorian Westphal <fw@strlen.de>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      e7942d06
    • David S. Miller's avatar
      Merge branch 'net-sched-actions-improve-dump-performance' · 764646b0
      David S. Miller authored
      Jamal Hadi Salim says:
      
      ====================
      net sched actions: improve dump performance
      
      Changes since v11:
      ------------------
      1) Jiri - renames: nla_value to value and nla_selector to selector
      2) Jiri - rename: validate_nla_bitfield_32 to validate_nla_bitfield_32
      3) Jiri - rename: NLA_BITFIELD_32 to NLA_BITFIELD32
      4) Jiri - remove unnecessary break when we return in case statement
      5) Jiri - rename and move nla_get_bitfield_32 to an earlier patch
      6) Jiri - xmas tree alignment of var declaration
      7) Jiri - rename all declarations of bitfield 32 vars to be consistent ("bf")
      8) Jiri - improve validate_nla_bitfield32() validation to disallow valid
                bit values that are not selected by the selector
      
      Changes since v10:
      -----------------
      1) Jiri: move type->validate_content() to its own patch
      Jamal: decided to remove it altogether so we can get this patch set in.
      
      2) Change name of NLA_FLAG_BITS to NLA_BITFIELD_32 based on discussions
      with D. Ahern and Jiri. D. Ahern suggests to make this a variable bitmap size.
      My analysis at this point is it too complex and i only need a few bit
      flags. If we run out of bits someone else can create a new NLA_BITFIELD_XXX
      and start using that. So please let this go.
      
      3) Jamal - Add Suggested-by: Jiri for type NLA_BITFIELD_32
      
      4) Jiri: Change name allowed_flags to tcaa_root_flags_allowed
      
      5) Jiri: Introduce nla_get_flag_bits_values() helper instead of using
      memcpy for retrieving nla_bitfield_32 fields.
      
      Changes since v9:
      -----------------
      
      1) General consensus:
      - remove again the use of BIT() to maintain uapi consistency ;->
      
      1) Jiri:
      - Add a new netlink type NLA_FLAG_BITS to check for valid bits
        and use it instead of inline vetting (patch 4/4 now)
      
      Changes since v8:
      -----------------
      
      1) Jiri:
      - Add back the use of BIT(). Eventually fix iproute2 instead
      - Rename VALID_TCA_FLAGS to VALID_TCA_ROOT_FLAGS
      
      Changes since v7:
      -----------------
      
      Jamal:
      No changes.
      Patch 1 went out twice. Resend without two copies of patch 1
      
      changes since v6:
      -----------------
      
      1) DaveM:
      New rules for netlink messages. From now on we are going to start
      checking for bits that are not used and rejecting anything we dont
      understand. In the future this is going to require major changes
      to user space code (tc etc). This is just a start.
      
      To quote, David:
      "
       Again, bits you aren't using now, make sure userspace doesn't
         set them.  And if it does, reject.
      "
      Added checks for ensuring things work as above.
      
      2) Jiri:
      a)Fix the commit message to properly use "Fixes" description
      b)Align assignments for nla_policy
      
      Changes since v5:
      ----------------
      
      0)
      Remove use of BIT() because it is kernel specific. Requires a separate
      patch (Jiri can submit that in his cleanups)
      
      1)To paraphrase Eric D.
      
      "memcpy(nla_data(count_attr), &cb->args[1], sizeof(u32));
      wont work on 64bit BE machines because cb->args[1]
      (which is 64 bit is larger in size than sizeof(u32))"
      
      Fixed
      
      2) Jiri Pirko
      
      i) Spotted a bug fix mixed in the patch for wrong TLV
      fix. Add patch 1/3 to address this. Make part of this
      series because of dependencies.
      
      ii) Rename ACT_LARGE_DUMP_ON -> TCA_FLAG_LARGE_DUMP_ON
      
      iii) Satisfy Jiri's obsession against the noun "tcaa"
      a)Rename struct nlattr *tcaa --> struct nlattr *tb
      b)Rename TCAA_ACT_XXX -> TCA_ROOT_XXX
      
      Changes since v4:
      -----------------
      
      1) Eric D.
      
      pointed out that when all skb space is used up by the dump
      there will be no space to insert the TCAA_ACT_COUNT attribute.
      
      2) Jiri:
      
      i) Change:
      
      enum {
              TCAA_UNSPEC,
              TCAA_ACT_TAB,
              TCAA_ACT_FLAGS,
              TCAA_ACT_COUNT,
              TCAA_ACT_TIME_FILTER,
              __TCAA_MAX
      };
      
      to:
      enum {
             TCAA_UNSPEC,
             TCAA_ACT_TAB,
             TCAA_ACT_FLAGS,
             TCAA_ACT_COUNT,
             __TCAA_MAX,
      };
      
      Jiri plans to followup with the rest of the code to make the
      style consistent.
      
      ii) Rename attribute TCAA_ACT_TIME_FILTER --> TCAA_ACT_TIME_DELTA
      
      iii) Rename variable jiffy_filter --> jiffy_since
      iv) Rename msecs_filter --> msecs_since
      v) get rid of unused cb->args[0] and rename cb->args[4] to cb->args[0]
      
      Earlier Changes
      ----------------
      - Jiri mostly on names of things.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      764646b0
    • Jamal Hadi Salim's avatar
      net sched actions: add time filter for action dumping · e62e484d
      Jamal Hadi Salim authored
      This patch adds support for filtering based on time since last used.
      When we are dumping a large number of actions it is useful to
      have the option of filtering based on when the action was last
      used to reduce the amount of data crossing to user space.
      
      With this patch the user space app sets the TCA_ROOT_TIME_DELTA
      attribute with the value in milliseconds with "time of interest
      since now".  The kernel converts this to jiffies and does the
      filtering comparison matching entries that have seen activity
      since then and returns them to user space.
      Old kernels and old tc continue to work in legacy mode since
      they dont specify this attribute.
      
      Some example (we have 400 actions bound to 400 filters); at
      installation time. Using updated when tc setting the time of
      interest to 120 seconds earlier (we see 400 actions):
      prompt$ hackedtc actions ls action gact since 120000| grep index | wc -l
      400
      
      go get some coffee and wait for > 120 seconds and try again:
      
      prompt$ hackedtc actions ls action gact since 120000 | grep index | wc -l
      0
      
      Lets see a filter bound to one of these actions:
      ....
      filter pref 10 u32
      filter pref 10 u32 fh 800: ht divisor 1
      filter pref 10 u32 fh 800::800 order 2048 key ht 800 bkt 0 flowid 1:10  (rule hit 2 success 1)
        match 7f000002/ffffffff at 12 (success 1 )
          action order 1: gact action pass
           random type none pass val 0
           index 23 ref 2 bind 1 installed 1145 sec used 802 sec
          Action statistics:
          Sent 84 bytes 1 pkt (dropped 0, overlimits 0 requeues 0)
          backlog 0b 0p requeues 0
      ....
      
      that coffee took long, no? It was good.
      
      Now lets ping -c 1 127.0.0.2, then run the actions again:
      prompt$ hackedtc actions ls action gact since 120 | grep index | wc -l
      1
      
      More details please:
      prompt$ hackedtc -s actions ls action gact since 120000
      
          action order 0: gact action pass
           random type none pass val 0
           index 23 ref 2 bind 1 installed 1270 sec used 30 sec
          Action statistics:
          Sent 168 bytes 2 pkt (dropped 0, overlimits 0 requeues 0)
          backlog 0b 0p requeues 0
      
      And the filter?
      
      filter pref 10 u32
      filter pref 10 u32 fh 800: ht divisor 1
      filter pref 10 u32 fh 800::800 order 2048 key ht 800 bkt 0 flowid 1:10  (rule hit 4 success 2)
        match 7f000002/ffffffff at 12 (success 2 )
          action order 1: gact action pass
           random type none pass val 0
           index 23 ref 2 bind 1 installed 1324 sec used 84 sec
          Action statistics:
          Sent 168 bytes 2 pkt (dropped 0, overlimits 0 requeues 0)
          backlog 0b 0p requeues 0
      Signed-off-by: default avatarJamal Hadi Salim <jhs@mojatatu.com>
      Reviewed-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      e62e484d
    • Jamal Hadi Salim's avatar
      net sched actions: dump more than TCA_ACT_MAX_PRIO actions per batch · 90825b23
      Jamal Hadi Salim authored
      When you dump hundreds of thousands of actions, getting only 32 per
      dump batch even when the socket buffer and memory allocations allow
      is inefficient.
      
      With this change, the user will get as many as possibly fitting
      within the given constraints available to the kernel.
      
      The top level action TLV space is extended. An attribute
      TCA_ROOT_FLAGS is used to carry flags; flag TCA_FLAG_LARGE_DUMP_ON
      is set by the user indicating the user is capable of processing
      these large dumps. Older user space which doesnt set this flag
      doesnt get the large (than 32) batches.
      The kernel uses the TCA_ROOT_COUNT attribute to tell the user how many
      actions are put in a single batch. As such user space app knows how long
      to iterate (independent of the type of action being dumped)
      instead of hardcoded maximum of 32 thus maintaining backward compat.
      
      Some results dumping 1.5M actions below:
      first an unpatched tc which doesnt understand these features...
      
      prompt$ time -p tc actions ls action gact | grep index | wc -l
      1500000
      real 1388.43
      user 2.07
      sys 1386.79
      
      Now lets see a patched tc which sets the correct flags when requesting
      a dump:
      
      prompt$ time -p updatedtc actions ls action gact | grep index | wc -l
      1500000
      real 178.13
      user 2.02
      sys 176.96
      
      That is about 8x performance improvement for tc app which sets its
      receive buffer to about 32K.
      Signed-off-by: default avatarJamal Hadi Salim <jhs@mojatatu.com>
      Reviewed-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      90825b23
    • Jamal Hadi Salim's avatar
      net sched actions: Use proper root attribute table for actions · df823b02
      Jamal Hadi Salim authored
      Bug fix for an issue which has been around for about a decade.
      We got away with it because the enumeration was larger than needed.
      
      Fixes: 7ba699c6 ("[NET_SCHED]: Convert actions from rtnetlink to new netlink API")
      Suggested-by: default avatarJiri Pirko <jiri@mellanox.com>
      Reviewed-by: default avatarSimon Horman <simon.horman@netronome.com>
      Signed-off-by: default avatarJamal Hadi Salim <jhs@mojatatu.com>
      Reviewed-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      df823b02
    • Jamal Hadi Salim's avatar
      net netlink: Add new type NLA_BITFIELD32 · 64c83d83
      Jamal Hadi Salim authored
      Generic bitflags attribute content sent to the kernel by user.
      With this netlink attr type the user can either set or unset a
      flag in the kernel.
      
      The value is a bitmap that defines the bit values being set
      The selector is a bitmask that defines which value bit is to be
      considered.
      
      A check is made to ensure the rules that a kernel subsystem always
      conforms to bitflags the kernel already knows about. i.e
      if the user tries to set a bit flag that is not understood then
      the _it will be rejected_.
      
      In the most basic form, the user specifies the attribute policy as:
      [ATTR_GOO] = { .type = NLA_BITFIELD32, .validation_data = &myvalidflags },
      
      where myvalidflags is the bit mask of the flags the kernel understands.
      
      If the user _does not_ provide myvalidflags then the attribute will
      also be rejected.
      
      Examples:
      value = 0x0, and selector = 0x1
      implies we are selecting bit 1 and we want to set its value to 0.
      
      value = 0x2, and selector = 0x2
      implies we are selecting bit 2 and we want to set its value to 1.
      Suggested-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarJamal Hadi Salim <jhs@mojatatu.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      64c83d83
    • Andrew Lunn's avatar
      net: fec: Allow reception of frames bigger than 1522 bytes · fbbeefdd
      Andrew Lunn authored
      The FEC Receive Control Register has a 14 bit field indicating the
      longest frame that may be received. It is being set to 1522. Frames
      longer than this are discarded, but counted as being in error.
      
      When using DSA, frames from the switch has an additional header,
      either 4 or 8 bytes if a Marvell switch is used. Thus a full MTU frame
      of 1522 bytes received by the switch on a port becomes 1530 bytes when
      passed to the host via the FEC interface.
      
      Change the maximum receive size to 2048 - 64, where 64 is the maximum
      rx_alignment applied on the receive buffer for AVB capable FEC
      cores. Use this value also for the maximum receive buffer size. The
      driver is already allocating a receive SKB of 2048 bytes, so this
      change should not have any significant effects.
      
      Tested on imx51, imx6, vf610.
      Signed-off-by: default avatarAndrew Lunn <andrew@lunn.ch>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      fbbeefdd
    • Andrew Lunn's avatar
      net: fec: Issue error for missing but expected PHY · 9558df3a
      Andrew Lunn authored
      If the PHY is missing but expected, e.g. because of a typ0 in the dt
      file, it is not possible to open the interface. ip link returns:
      
      RTNETLINK answers: No such device
      
      It is not very obvious what the problem is. Add a netdev_err() in this
      case to make it easier to debug the issue.
      
      [   21.409385] fec 2188000.ethernet eth0: Unable to connect to phy
      RTNETLINK answers: No such device
      Signed-off-by: default avatarAndrew Lunn <andrew@lunn.ch>
      Acked-by: default avatarFugang Duan <fugang.duan@nxp.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9558df3a