1. 24 Jul, 2018 29 commits
    • David S. Miller's avatar
      Merge tag 'mac80211-next-for-davem-2018-07-24' of... · c93622b5
      David S. Miller authored
      Merge tag 'mac80211-next-for-davem-2018-07-24' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
      
      Johannes Berg says:
      
      ====================
      Only a few things:
       * HE (802.11ax) support in HWSIM
       * bypass TXQ with NDP frames as they're special
       * convert ahash -> shash in lib80211 TKIP
       * avoid playing with tailroom counter defer unless
         needed to avoid issues in some cases
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c93622b5
    • Manikanta Pubbisetty's avatar
      mac80211: restrict delayed tailroom needed decrement · 133bf90d
      Manikanta Pubbisetty authored
      As explained in ieee80211_delayed_tailroom_dec(), during roam,
      keys of the old AP will be destroyed and new keys will be
      installed. Deletion of the old key causes
      crypto_tx_tailroom_needed_cnt to go from 1 to 0 and the new key
      installation causes a transition from 0 to 1.
      
      Whenever crypto_tx_tailroom_needed_cnt transitions from 0 to 1,
      we invoke synchronize_net(); the reason for doing this is to avoid
      a race in the TX path as explained in increment_tailroom_need_count().
      This synchronize_net() operation can be slow and can affect the station
      roam time. To avoid this, decrementing the crypto_tx_tailroom_needed_cnt
      is delayed for a while so that upon installation of new key the
      transition would be from 1 to 2 instead of 0 to 1 and thereby
      improving the roam time.
      
      This is all correct for a STA iftype, but deferring the tailroom_needed
      decrement for other iftypes may be unnecessary.
      
      For example, let's consider the case of a 4-addr client connecting to
      an AP for which AP_VLAN interface is also created, let the initial
      value for tailroom_needed on the AP be 1.
      
      * 4-addr client connects to the AP (AP: tailroom_needed = 1)
      * AP will clear old keys, delay decrement of tailroom_needed count
      * AP_VLAN is created, it takes the tailroom count from master
        (AP_VLAN: tailroom_needed = 1, AP: tailroom_needed = 1)
      * Install new key for the station, assume key is plumbed in the HW,
        there won't be any change in tailroom_needed count on AP iface
      * Delayed decrement of tailroom_needed count on AP
        (AP: tailroom_needed = 0, AP_VLAN: tailroom_needed = 1)
      
      Because of the delayed decrement on AP iface, tailroom_needed count goes
      out of sync between AP(master iface) and AP_VLAN(slave iface) and
      there would be unnecessary tailroom created for the packets going
      through AP_VLAN iface.
      
      Also, WARN_ONs were observed while trying to bring down the AP_VLAN
      interface:
      (warn_slowpath_common) (warn_slowpath_null+0x18/0x20)
      (warn_slowpath_null) (ieee80211_free_keys+0x114/0x1e4)
      (ieee80211_free_keys) (ieee80211_del_virtual_monitor+0x51c/0x850)
      (ieee80211_del_virtual_monitor) (ieee80211_stop+0x30/0x3c)
      (ieee80211_stop) (__dev_close_many+0x94/0xb8)
      (__dev_close_many) (dev_close_many+0x5c/0xc8)
      
      Restricting delayed decrement to station interface alone fixes the problem
      and it makes sense to do so because delayed decrement is done to improve
      roam time which is applicable only for client devices.
      Signed-off-by: default avatarManikanta Pubbisetty <mpubbise@codeaurora.org>
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      133bf90d
    • Kees Cook's avatar
      wireless/lib80211: Convert from ahash to shash · d17504b1
      Kees Cook authored
      In preparing to remove all stack VLA usage from the kernel[1], this
      removes the discouraged use of AHASH_REQUEST_ON_STACK in favor of
      the smaller SHASH_DESC_ON_STACK by converting from ahash-wrapped-shash
      to direct shash. The stack allocation will be made a fixed size in a
      later patch to the crypto subsystem.
      
      [1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.comSigned-off-by: default avatarKees Cook <keescook@chromium.org>
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      d17504b1
    • David S. Miller's avatar
      Merge tag 'wireless-drivers-next-for-davem-2018-07-23' of... · a527d3f7
      David S. Miller authored
      Merge tag 'wireless-drivers-next-for-davem-2018-07-23' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next
      
      Kalle Valo says:
      
      ====================
      wireless-drivers-next patches for 4.19
      
      The first set of patches for 4.19. Only smaller features and bug
      fixes, not really anything major. Also included are changes to
      include/linux/bitfield.h, we agreed with Johannes that it makes sense
      to apply them via wireless-drivers-next.
      
      Major changes:
      
      ath10k
      
      * support channel 173
      
      * fix spectral scan for QCA9984 and QCA9888 chipsets
      
      ath6kl
      
      * add support for Dell Wireless 1537
      
      ti wlcore
      
      * add support for runtime PM
      
      * enable runtime PM autosuspend support
      
      qtnfmac
      
      * support changing MAC address
      
      * enable source MAC address randomization support
      
      libertas
      
      * fix suspend and resume for SDIO cards
      
      mt76
      
      * add software DFS radar pattern detector for mt76x2 based devices
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a527d3f7
    • David S. Miller's avatar
      Merge branch 'rds-ipv6' · 176bd861
      David S. Miller authored
      Ka-Cheong Poon says:
      
      ====================
      rds: IPv6 support
      
      This patch set adds IPv6 support to the kernel RDS and related
      modules.  Existing RDS apps using IPv4 address continue to run without
      any problem.  New RDS apps which want to use IPv6 address can do so by
      passing the address in struct sockaddr_in6 to bind(), connect() or
      sendmsg().  And those apps also need to use the new IPv6 equivalents
      of some of the existing socket options as the existing options use a
      32 bit integer to store IP address.
      
      All RDS code now use struct in6_addr to store IP address.  IPv4
      address is stored as an IPv4 mapped address.
      
      Header file changes
      
      There are many data structures (RDS socket options) used by RDS apps
      which use a 32 bit integer to store IP address. To support IPv6,
      struct in6_addr needs to be used. To ensure backward compatibility, a
      new data structure is introduced for each of those data structures
      which use a 32 bit integer to represent an IP address. And new socket
      options are introduced to use those new structures. This means that
      existing apps should work without a problem with the new RDS module.
      For apps which want to use IPv6, those new data structures and socket
      options can be used. IPv4 mapped address is used to represent IPv4
      address in the new data structures.
      
      Internally, all RDS data structures which contain an IP address are
      changed to use struct in6_addr to store the address. IPv4 address is
      stored as an IPv4 mapped address. All the functions which take an IP
      address as argument are also changed to use struct in6_addr.
      
      RDS/RDMA/IB uses a private data (struct rds_ib_connect_private)
      exchange between endpoints at RDS connection establishment time to
      support RDMA. This private data exchange uses a 32 bit integer to
      represent an IP address. This needs to be changed in order to support
      IPv6. A new private data struct rds6_ib_connect_private is introduced
      to handle this. To ensure backward compatibility, an IPv6 capable RDS
      stack uses another RDMA listener port (RDS_CM_PORT) to accept IPv6
      connection. And it continues to use the original RDS_PORT for IPv4 RDS
      connections. When it needs to communicate with an IPv6 peer, it uses
      the RDS_TCP_PORT to send the connection set up request.
      
      RDS/TCP changes
      
      TCP related code is changed to support IPv6.  Note that only an IPv6
      TCP listener on port RDS_TCP_PORT is created as it can accept both
      IPv4 and IPv6 connection requests.
      
      IB/RDMA changes
      
      The initial private data exchange between IB endpoints using RDMA is
      changed to support IPv6 address instead, if the peer address is IPv6.
      To ensure backward compatibility, annother RDMA listener port
      (RDS_CM_PORT) is used to accept IPv6 connection. An IPv6 capable RDS
      module continues to use the original RDS_PORT for IPv4 RDS
      connections. When it needs to communicate with an IPv6 peer, it uses
      the RDS_CM_PORT to send the connection set up request.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      176bd861
    • Ka-Cheong Poon's avatar
      rds: Extend RDS API for IPv6 support · b7ff8b10
      Ka-Cheong Poon authored
      There are many data structures (RDS socket options) used by RDS apps
      which use a 32 bit integer to store IP address. To support IPv6,
      struct in6_addr needs to be used. To ensure backward compatibility, a
      new data structure is introduced for each of those data structures
      which use a 32 bit integer to represent an IP address. And new socket
      options are introduced to use those new structures. This means that
      existing apps should work without a problem with the new RDS module.
      For apps which want to use IPv6, those new data structures and socket
      options can be used. IPv4 mapped address is used to represent IPv4
      address in the new data structures.
      
      v4: Revert changes to SO_RDS_TRANSPORT
      Signed-off-by: default avatarKa-Cheong Poon <ka-cheong.poon@oracle.com>
      Acked-by: default avatarSantosh Shilimkar <santosh.shilimkar@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b7ff8b10
    • Ka-Cheong Poon's avatar
      rds: Enable RDS IPv6 support · 1e2b44e7
      Ka-Cheong Poon authored
      This patch enables RDS to use IPv6 addresses. For RDS/TCP, the
      listener is now an IPv6 endpoint which accepts both IPv4 and IPv6
      connection requests.  RDS/RDMA/IB uses a private data (struct
      rds_ib_connect_private) exchange between endpoints at RDS connection
      establishment time to support RDMA. This private data exchange uses a
      32 bit integer to represent an IP address. This needs to be changed in
      order to support IPv6. A new private data struct
      rds6_ib_connect_private is introduced to handle this. To ensure
      backward compatibility, an IPv6 capable RDS stack uses another RDMA
      listener port (RDS_CM_PORT) to accept IPv6 connection. And it
      continues to use the original RDS_PORT for IPv4 RDS connections. When
      it needs to communicate with an IPv6 peer, it uses the RDS_CM_PORT to
      send the connection set up request.
      
      v5: Fixed syntax problem (David Miller).
      
      v4: Changed port history comments in rds.h (Sowmini Varadhan).
      
      v3: Added support to set up IPv4 connection using mapped address
          (David Miller).
          Added support to set up connection between link local and non-link
          addresses.
          Various review comments from Santosh Shilimkar and Sowmini Varadhan.
      
      v2: Fixed bound and peer address scope mismatched issue.
          Added back rds_connect() IPv6 changes.
      Signed-off-by: default avatarKa-Cheong Poon <ka-cheong.poon@oracle.com>
      Acked-by: default avatarSantosh Shilimkar <santosh.shilimkar@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1e2b44e7
    • Ka-Cheong Poon's avatar
      rds: Changing IP address internal representation to struct in6_addr · eee2fa6a
      Ka-Cheong Poon authored
      This patch changes the internal representation of an IP address to use
      struct in6_addr.  IPv4 address is stored as an IPv4 mapped address.
      All the functions which take an IP address as argument are also
      changed to use struct in6_addr.  But RDS socket layer is not modified
      such that it still does not accept IPv6 address from an application.
      And RDS layer does not accept nor initiate IPv6 connections.
      
      v2: Fixed sparse warnings.
      Signed-off-by: default avatarKa-Cheong Poon <ka-cheong.poon@oracle.com>
      Acked-by: default avatarSantosh Shilimkar <santosh.shilimkar@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      eee2fa6a
    • David S. Miller's avatar
      Merge branch 'sched-introduce-chain-templates-support-with-offloading-to-mlxsw' · a6c90dd3
      David S. Miller authored
      Jiri Pirko says:
      
      ====================
      sched: introduce chain templates support with offloading to mlxsw
      
      For the TC clsact offload these days, some of HW drivers need
      to hold a magic ball. The reason is, with the first inserted rule inside
      HW they need to guess what fields will be used for the matching. If
      later on this guess proves to be wrong and user adds a filter with a
      different field to match, there's a problem. Mlxsw resolves it now with
      couple of patterns. Those try to cover as many match fields as possible.
      This aproach is far from optimal, both performance-wise and scale-wise.
      Also, there is a combination of filters that in certain order won't
      succeed.
      
      Most of the time, when user inserts filters in chain, he knows right away
      how the filters are going to look like - what type and option will they
      have. For example, he knows that he will only insert filters of type
      flower matching destination IP address. He can specify a template that
      would cover all the filters in the chain.
      
      This patchset is providing the possibility to user to provide such
      template to kernel and propagate it all the way down to device
      drivers.
      
      See the examples below.
      
      Create dummy device with clsact first:
      
      There is no chain present by by default:
      
      Add chain number 11 by explicit command:
      chain parent ffff: chain 11
      
      Add filter to chain number 12 which does not exist. That will create
      implicit chain 12:
      chain parent ffff: chain 11
      chain parent ffff: chain 12
      
      Delete both chains:
      
      Add a chain with template of type flower allowing to insert rules matching
      on last 2 bytes of destination mac address:
      
      The chain with template is now showed in the list:
      chain parent ffff: flower chain 0
        dst_mac 00:00:00:00:00:00/00:00:00:00:ff:ff
        eth_type ipv4
      
      Add another chain (number 22) with template:
      chain parent ffff: flower chain 0
        dst_mac 00:00:00:00:00:00/00:00:00:00:ff:ff
        eth_type ipv4
      chain parent ffff: flower chain 22
        eth_type ipv4
        dst_ip 0.0.0.0/16
      
      Add a filter that fits the template:
      
      Addition of filters that does not fit the template would fail:
      Error: cls_flower: Mask does not fit the template.
      We have an error talking to the kernel, -1
      Error: cls_flower: Mask does not fit the template.
      We have an error talking to the kernel, -1
      
      Additions of filters to chain 22:
      Error: cls_flower: Mask does not fit the template.
      We have an error talking to the kernel, -1
      Error: cls_flower: Mask does not fit the template.
      We have an error talking to the kernel, -1
      
      ---
      v3->v4:
      - patch 2:
        - new patch
      - patch 3:
        - new patch, derived from the previous v3 chaintemplate obj patch
      - patch 4:
        - only templates part as chains creation/deletion is now a separate patch
        - don't pass template priv as arg of "change" op
      - patch 6:
        - rebased on top of flower cvlan patch and ip tos/ttl patch
      - patch 7:
        - templave priv is no longer passed as an arg to "change" op
      - patch 11:
        - split from the originally single patch
      - patch 12:
        - split from the originally single patch
      v2->v3:
      - patch 7:
        - rebase on top of the reoffload patchset
      - patch 8:
        - rebase on top of the reoffload patchset
      v1->v2:
      - patch 8:
        - remove leftover extack arg in fl_hw_create_tmplt()
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a6c90dd3
    • Jiri Pirko's avatar
      selftests: forwarding: add tests for TC chain templates · d159b381
      Jiri Pirko authored
      Add basic sanity tests for TC chain templates.
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d159b381
    • Jiri Pirko's avatar
      selftests: forwarding: add tests for TC chains creation adn destruction · 2d73c887
      Jiri Pirko authored
      Add basic sanity tests for TC chains.
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2d73c887
    • Jiri Pirko's avatar
      selftests: forwarding: move shblock tc support check to a separate helper · 7f333cbf
      Jiri Pirko authored
      The shared block support is only needed for tc_shblock.sh. No need to
      require that for other test.
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      7f333cbf
    • Jiri Pirko's avatar
      mlxsw: spectrum: Implement chain template hinting · e2f2a1fd
      Jiri Pirko authored
      Since cld_flower provides information about the filter template for
      specific chain, use this information in order to prepare a region.
      Use the template to find out what elements are going to be used
      and pass that down to mlxsw_sp_acl_tcam_group_add(). Later on, when the
      first filter is inserted, the mlxsw_sp_acl_tcam_group_use_patterns()
      function would use this element usage information instead of looking
      up a pattern.
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      e2f2a1fd
    • Jiri Pirko's avatar
      net: sched: cls_flower: propagate chain teplate creation and destruction to drivers · 34738452
      Jiri Pirko authored
      Introduce a couple of flower offload commands in order to propagate
      template creation/destruction events down to device drivers.
      Drivers may use this information to prepare HW in an optimal way
      for future filter insertions.
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      34738452
    • Jiri Pirko's avatar
      net: sched: cls_flower: implement chain templates · b95ec7eb
      Jiri Pirko authored
      Use the previously introduced template extension and implement
      callback to create, destroy and dump chain template. The existing
      parsing and dumping functions are re-used. Also, check if newly added
      filters fit the template if it is set.
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b95ec7eb
    • Jiri Pirko's avatar
      net: sched: cls_flower: change fl_init_dissector to accept mask and dissector · 33fb5cba
      Jiri Pirko authored
      This function is going to be used for templates as well, so we need to
      pass the pointer separately.
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      33fb5cba
    • Jiri Pirko's avatar
      net: sched: cls_flower: move key/mask dumping into a separate function · f5749081
      Jiri Pirko authored
      Push key/mask dumping from fl_dump() into a separate function
      fl_dump_key(), that will be reused for template dumping.
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f5749081
    • Jiri Pirko's avatar
      net: sched: introduce chain templates · 9f407f17
      Jiri Pirko authored
      Allow user to set a template for newly created chains. Template lock
      down the chain for particular classifier type/options combinations.
      The classifier needs to support templates, otherwise kernel would
      reply with error.
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9f407f17
    • Jiri Pirko's avatar
      net: sched: introduce chain object to uapi · 32a4f5ec
      Jiri Pirko authored
      Allow user to create, destroy, get and dump chain objects. Do that by
      extending rtnl commands by the chain-specific ones. User will now be
      able to explicitly create or destroy chains (so far this was done only
      automatically according the filter/act needs and refcounting). Also, the
      user will receive notification about any chain creation or destuction.
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      32a4f5ec
    • Jiri Pirko's avatar
      net: sched: Avoid implicit chain 0 creation · f71e0ca4
      Jiri Pirko authored
      Currently, chain 0 is implicitly created during block creation. However
      that does not align with chain object exposure, creation and destruction
      api introduced later on. So make the chain 0 behave the same way as any
      other chain and only create it when it is needed. Since chain 0 is
      somehow special as the qdiscs need to hold pointer to the first chain
      tp, this requires to move the chain head change callback infra to the
      block structure.
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f71e0ca4
    • Jiri Pirko's avatar
      net: sched: push ops lookup bits into tcf_proto_lookup_ops() · f34e8bff
      Jiri Pirko authored
      Push all bits that take care of ops lookup, including module loading
      outside tcf_proto_create() function, into tcf_proto_lookup_ops()
      Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f34e8bff
    • David S. Miller's avatar
      Merge branch 'cpsw-add-MQPRIO-and-CBS-Qdisc-offload' · d3585edf
      David S. Miller authored
      Ivan Khoronzhuk says:
      
      ====================
      net: ethernet: ti: cpsw: add MQPRIO and CBS Qdisc offload
      
      This series adds MQPRIO and CBS Qdisc offload for TI cpsw driver.
      It potentially can be used in audio video bridging (AVB) and time
      sensitive networking (TSN).
      
      Patchset was tested on AM572x EVM and BBB boards. Last patch from this
      series adds detailed description of configuration with examples. For
      consistency reasons, in role of talker and listener, tools from
      patchset "TSN: Add qdisc based config interface for CBS" were used and
      can be seen here: https://www.spinics.net/lists/netdev/msg460869.html
      
      Based on net-next/master
      
      v5..v4:
      - corrected typo of "am57xx" board name, no functional changes
      
      v4..v3:
       - nothing, just rebase
      
      v3..v2:
       - corrected typo of "shaper" word, no functional changes
      
      v2..v1:
       - changed name cpsw.txt on ti-cpsw.txt
       - changed name cpsw_set_tc() on cpsw_set_mqprio()
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d3585edf
    • Ivan Khoronzhuk's avatar
      Documentation: networking: cpsw: add MQPRIO & CBS offload examples · ae62372f
      Ivan Khoronzhuk authored
      This document describes MQPRIO and CBS Qdisc offload configuration
      for cpsw driver based on examples. It potentially can be used in
      audio video bridging (AVB) and time sensitive networking (TSN).
      Reviewed-by: default avatarIlias Apalodimas <ilias.apalodimas@linaro.org>
      Reviewed-by: default avatarGrygorii Strashko <grygorii.strashko@ti.com>
      Signed-off-by: default avatarIvan Khoronzhuk <ivan.khoronzhuk@linaro.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ae62372f
    • Ivan Khoronzhuk's avatar
      net: ethernet: ti: cpsw: restore shaper configuration while down/up · 4b4255ed
      Ivan Khoronzhuk authored
      Need to restore shapers configuration after interface was down/up.
      This is needed as appropriate configuration is still replicated in
      kernel settings. This only shapers context restore, so vlan
      configuration should be restored by user if needed, especially for
      devices with one port where vlan frames are sent via ALE.
      Reviewed-by: default avatarIlias Apalodimas <ilias.apalodimas@linaro.org>
      Reviewed-by: default avatarGrygorii Strashko <grygorii.strashko@ti.com>
      Signed-off-by: default avatarIvan Khoronzhuk <ivan.khoronzhuk@linaro.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4b4255ed
    • Ivan Khoronzhuk's avatar
      net: ethernet: ti: cpsw: add CBS Qdisc offload · 57d90148
      Ivan Khoronzhuk authored
      The cpsw has up to 4 FIFOs per port and upper 3 FIFOs can feed rate
      limited queue with shaping. In order to set and enable shaping for
      those 3 FIFOs queues the network device with CBS qdisc attached is
      needed. The CBS configuration is added for dual-emac/single port mode
      only, but potentially can be used in switch mode also, based on
      switchdev for instance.
      
      Despite the FIFO shapers can work w/o cpdma level shapers the base
      usage must be in combine with cpdma level shapers as described in TRM,
      that are set as maximum rates for interface queues with sysfs.
      
      One of the possible configuration with txq shapers and CBS shapers:
      
                            Configured with echo RATE >
                        /sys/class/net/eth0/queues/tx-0/tx_maxrate
                   /---------------------------------------------------
                  /
                 /            cpdma level shapers
              +----+ +----+ +----+ +----+ +----+ +----+ +----+ +----+
              | c7 | | c6 | | c5 | | c4 | | c3 | | c2 | | c1 | | c0 |
              \    / \    / \    / \    / \    / \    / \    / \    /
               \  /   \  /   \  /   \  /   \  /   \  /   \  /   \  /
                \/     \/     \/     \/     \/     \/     \/     \/
      +---------|------|------|------|-------------------------------------+
      |    +----+      |      |  +---+                                     |
      |    |      +----+      |  |                                         |
      |    v      v           v  v                                         |
      | +----+ +----+ +----+ +----+ p        p+----+ +----+ +----+ +----+  |
      | |    | |    | |    | |    | o        o|    | |    | |    | |    |  |
      | | f3 | | f2 | | f1 | | f0 | r  CPSW  r| f3 | | f2 | | f1 | | f0 |  |
      | |    | |    | |    | |    | t        t|    | |    | |    | |    |  |
      | \    / \    / \    / \    / 0        1\    / \    / \    / \    /  |
      |  \  X   \  /   \  /   \  /             \  /   \  /   \  /   \  /   |
      |   \/ \   \/     \/     \/               \/     \/     \/     \/    |
      +-------\------------------------------------------------------------+
               \
                \ FIFO shaper, set with CBS offload added in this patch,
                 \ FIFO0 cannot be rate limited
                  ------------------------------------------------------
      
      CBS shaper configuration is supposed to be used with root MQPRIO Qdisc
      offload allowing to add sk_prio->tc->txq maps that direct traffic to
      appropriate tx queue and maps L2 priority to FIFO shaper.
      
      The CBS shaper is intended to be used for AVB where L2 priority
      (pcp field) is used to differentiate class of traffic. So additionally
      vlan needs to be created with appropriate egress sk_prio->l2 prio map.
      
      If CBS has several tx queues assigned to it, the sum of their
      bandwidth has not overlap bandwidth set for CBS. It's recomended the
      CBS bandwidth to be a little bit more.
      
      The CBS shaper is configured with CBS qdisc offload interface using tc
      tool from iproute2 packet.
      
      For instance:
      
      $ tc qdisc replace dev eth0 handle 100: parent root mqprio num_tc 3 \
      map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@2 hw 1
      
      $ tc -g class show dev eth0
      +---(100:ffe2) mqprio
      |    +---(100:3) mqprio
      |    +---(100:4) mqprio
      |    
      +---(100:ffe1) mqprio
      |    +---(100:2) mqprio
      |    
      +---(100:ffe0) mqprio
           +---(100:1) mqprio
      
      $ tc qdisc add dev eth0 parent 100:1 cbs locredit -1440 \
      hicredit 60 sendslope -960000 idleslope 40000 offload 1
      
      $ tc qdisc add dev eth0 parent 100:2 cbs locredit -1470 \
      hicredit 62 sendslope -980000 idleslope 20000 offload 1
      
      The above code set CBS shapers for tc0 and tc1, for that txq0 and
      txq1 is used. Pay attention, the real set bandwidth can differ a bit
      due to discreteness of configuration parameters.
      
      Here parameters like locredit, hicredit and sendslope are ignored
      internally and are supposed to be set with assumption that maximum
      frame size for frame - 1500.
      
      It's supposed that interface speed is not changed while reconnection,
      not always is true, so inform user in case speed of interface was
      changed, as it can impact on dependent shapers configuration.
      
      For more examples see Documentation.
      Reviewed-by: default avatarIlias Apalodimas <ilias.apalodimas@linaro.org>
      Reviewed-by: default avatarGrygorii Strashko <grygorii.strashko@ti.com>
      Signed-off-by: default avatarIvan Khoronzhuk <ivan.khoronzhuk@linaro.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      57d90148
    • Ivan Khoronzhuk's avatar
      net: ethernet: ti: cpsw: add MQPRIO Qdisc offload · 7929a668
      Ivan Khoronzhuk authored
      That's possible to offload vlan to tc priority mapping with
      assumption sk_prio == L2 prio.
      
      Example:
      $ ethtool -L eth0 rx 1 tx 4
      
      $ qdisc replace dev eth0 handle 100: parent root mqprio num_tc 3 \
      map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@2 hw 1
      
      $ tc -g class show dev eth0
      +---(100:ffe2) mqprio
      |    +---(100:3) mqprio
      |    +---(100:4) mqprio
      |    
      +---(100:ffe1) mqprio
      |    +---(100:2) mqprio
      |    
      +---(100:ffe0) mqprio
           +---(100:1) mqprio
      
      Here, 100:1 is txq0, 100:2 is txq1, 100:3 is txq2, 100:4 is txq3
      txq0 belongs to tc0, txq1 to tc1, txq2 and txq3 to tc2
      The offload part only maps L2 prio to classes of traffic, but not
      to transmit queues, so to direct traffic to traffic class vlan has
      to be created with appropriate egress map.
      Reviewed-by: default avatarIlias Apalodimas <ilias.apalodimas@linaro.org>
      Reviewed-by: default avatarGrygorii Strashko <grygorii.strashko@ti.com>
      Signed-off-by: default avatarIvan Khoronzhuk <ivan.khoronzhuk@linaro.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      7929a668
    • Ivan Khoronzhuk's avatar
      net: ethernet: ti: cpdma: fit rated channels in backward order · 4bb6c356
      Ivan Khoronzhuk authored
      According to TRM tx rated channels should be in 7..0 order,
      so correct it.
      Reviewed-by: default avatarIlias Apalodimas <ilias.apalodimas@linaro.org>
      Reviewed-by: default avatarGrygorii Strashko <grygorii.strashko@ti.com>
      Signed-off-by: default avatarIvan Khoronzhuk <ivan.khoronzhuk@linaro.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4bb6c356
    • Ivan Khoronzhuk's avatar
      net: ethernet: ti: cpsw: use cpdma channels in backward order for txq · 79b3325d
      Ivan Khoronzhuk authored
      The cpdma channel highest priority is from hi to lo number.
      The driver has limited number of descriptors that are shared between
      number of cpdma channels. Number of queues can be tuned with ethtool,
      that allows to not spend descriptors on not needed cpdma channels.
      In AVB usually only 2 tx queues can be enough with rate limitation.
      The rate limitation can be used only for hi priority queues. Thus, to
      use only 2 queues the 8 has to be created. It's wasteful.
      
      So, in order to allow using only needed number of rate limited
      tx queues, save resources, and be able to set rate limitation for
      them, let assign tx cpdma channels in backward order to queues.
      Reviewed-by: default avatarIlias Apalodimas <ilias.apalodimas@linaro.org>
      Reviewed-by: default avatarGrygorii Strashko <grygorii.strashko@ti.com>
      Signed-off-by: default avatarIvan Khoronzhuk <ivan.khoronzhuk@linaro.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      79b3325d
    • David S. Miller's avatar
      Merge tag 'mlx5e-updates-2018-07-18-v2' of... · b19c7bb1
      David S. Miller authored
      Merge tag 'mlx5e-updates-2018-07-18-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux
      
      Saeed Mahameed says:
      
      ====================
      mlx5e-updates-2018-07-18
      
      This series includes update for mlx5e net device driver.
      
      1) From Feras Daoud, Added the support for firmware log tracing,
      first by introducing the firmware API needed for the task and then
      For each PF do the following:
          1- Allocate memory for the tracer strings database and read it from the FW to the SW.
          2- Allocate and dma map tracer buffers.
      
          Traces that will be written into the buffer will be parsed as a group
          of one or more traces, referred to as trace message. The trace message
          represents a C-like printf string.
      Once a new trace is available  FW will generate an event indicates new trace/s are
      available and the driver will parse them and dump them using tracepoints
      event tracing
      
      Enable mlx5 fw tracing by:
      echo 1 > /sys/kernel/debug/tracing/events/mlx5/mlx5_fw/enable
      
      Read traces by:
      cat /sys/kernel/debug/tracing/trace
      
      2) From Roi Dayan, Remove redundant WARN when we cannot find neigh entry
      
      3) From Jianbo Liu, TC double vlan support
      - Support offloading tc double vlan headers match
      - Support offloading double vlan push/pop tc actions
      
      4) From Boris, re-visit UDP GSO, remove the splitting of UDP_GSO_L4 packets
      in the driver, and exposes UDP_GSO_L4 as a PARTIAL_GSO feature.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b19c7bb1
  2. 23 Jul, 2018 11 commits