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  1. 03 Sep, 2019 25 commits
  3. 02 Sep, 2019 10 commits
    • David S. Miller's avatar
      Merge branch 'mvpp2-per-cpu-buffers' · 67538eb5
      David S. Miller authored 
      Matteo Croce says:

====================
mvpp2: per-cpu buffers

This patchset workarounds an PP2 HW limitation which prevents to use
per-cpu rx buffers.
The first patch is just a refactor to prepare for the second one.
The second one allocates percpu buffers if the following conditions are met:
- CPU number is less or equal 4
- no port is using jumbo frames

If the following conditions are not met at load time, of jumbo frame is enabled
later on, the shared allocation is reverted.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      67538eb5
    • Matteo Croce's avatar
      mvpp2: percpu buffers · 7d04b0b1
      Matteo Croce authored 
      Every mvpp2 unit can use up to 8 buffers mapped by the BM (the HW buffer
manager). The HW will place the frames in the buffer pool depending on the
frame size: short (< 128 bytes), long (< 1664) or jumbo (up to 9856).

As any unit can have up to 4 ports, the driver allocates only 2 pools,
one for small and one long frames, and share them between ports.
When the first port MTU is set higher than 1664 bytes, a third pool is
allocated for jumbo frames.

This shared allocation makes impossible to use percpu allocators,
and creates contention between HW queues.

If possible, i.e. if the number of possible CPU are less than 8 and jumbo
frames are not used, switch to a new scheme: allocate 8 per-cpu pools for
short and long frames and bind every pool to an RXQ.

When the first port MTU is set higher than 1664 bytes, the allocation
scheme is reverted to the old behaviour (3 shared pools), and when all
ports MTU are lowered, the per-cpu buffers are allocated again.
Signed-off-by: default avatarMatteo Croce <mcroce@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      7d04b0b1
    • Matteo Croce's avatar
      mvpp2: refactor BM pool functions · 13616361
      Matteo Croce authored 
      Refactor mvpp2_bm_pool_create(), mvpp2_bm_pool_destroy() and
mvpp2_bm_pools_init() so that they accept a struct device instead
of a struct platform_device, as they just need platform_device->dev.

Removing such dependency makes the BM code more reusable in context
where we don't have a pointer to the platform_device.
Signed-off-by: default avatarMatteo Croce <mcroce@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      13616361
    • Vladimir Oltean's avatar
      net: dsa: Fix off-by-one number of calls to devlink_port_unregister · 4ba0ebbc
      Vladimir Oltean authored 
      When a function such as dsa_slave_create fails, currently the following
stack trace can be seen:

[    2.038342] sja1105 spi0.1: Probed switch chip: SJA1105T
[    2.054556] sja1105 spi0.1: Reset switch and programmed static config
[    2.063837] sja1105 spi0.1: Enabled switch tagging
[    2.068706] fsl-gianfar soc:ethernet@2d90000 eth2: error -19 setting up slave phy
[    2.076371] ------------[ cut here ]------------
[    2.080973] WARNING: CPU: 1 PID: 21 at net/core/devlink.c:6184 devlink_free+0x1b4/0x1c0
[    2.088954] Modules linked in:
[    2.092005] CPU: 1 PID: 21 Comm: kworker/1:1 Not tainted 5.3.0-rc6-01360-g41b52e38d2b6-dirty #1746
[    2.100912] Hardware name: Freescale LS1021A
[    2.105162] Workqueue: events deferred_probe_work_func
[    2.110287] [<c03133a4>] (unwind_backtrace) from [<c030d8cc>] (show_stack+0x10/0x14)
[    2.117992] [<c030d8cc>] (show_stack) from [<c10b08d8>] (dump_stack+0xb4/0xc8)
[    2.125180] [<c10b08d8>] (dump_stack) from [<c0349d04>] (__warn+0xe0/0xf8)
[    2.132018] [<c0349d04>] (__warn) from [<c0349e34>] (warn_slowpath_null+0x40/0x48)
[    2.139549] [<c0349e34>] (warn_slowpath_null) from [<c0f19d74>] (devlink_free+0x1b4/0x1c0)
[    2.147772] [<c0f19d74>] (devlink_free) from [<c1064fc0>] (dsa_switch_teardown+0x60/0x6c)
[    2.155907] [<c1064fc0>] (dsa_switch_teardown) from [<c1065950>] (dsa_register_switch+0x8e4/0xaa8)
[    2.164821] [<c1065950>] (dsa_register_switch) from [<c0ba7fe4>] (sja1105_probe+0x21c/0x2ec)
[    2.173216] [<c0ba7fe4>] (sja1105_probe) from [<c0b35948>] (spi_drv_probe+0x80/0xa4)
[    2.180920] [<c0b35948>] (spi_drv_probe) from [<c0a4c1cc>] (really_probe+0x108/0x400)
[    2.188711] [<c0a4c1cc>] (really_probe) from [<c0a4c694>] (driver_probe_device+0x78/0x1bc)
[    2.196933] [<c0a4c694>] (driver_probe_device) from [<c0a4a3dc>] (bus_for_each_drv+0x58/0xb8)
[    2.205414] [<c0a4a3dc>] (bus_for_each_drv) from [<c0a4c024>] (__device_attach+0xd0/0x168)
[    2.213637] [<c0a4c024>] (__device_attach) from [<c0a4b1d0>] (bus_probe_device+0x84/0x8c)
[    2.221772] [<c0a4b1d0>] (bus_probe_device) from [<c0a4b72c>] (deferred_probe_work_func+0x84/0xc4)
[    2.230686] [<c0a4b72c>] (deferred_probe_work_func) from [<c03650a4>] (process_one_work+0x218/0x510)
[    2.239772] [<c03650a4>] (process_one_work) from [<c03660d8>] (worker_thread+0x2a8/0x5c0)
[    2.247908] [<c03660d8>] (worker_thread) from [<c036b348>] (kthread+0x148/0x150)
[    2.255265] [<c036b348>] (kthread) from [<c03010e8>] (ret_from_fork+0x14/0x2c)
[    2.262444] Exception stack(0xea965fb0 to 0xea965ff8)
[    2.267466] 5fa0:                                     00000000 00000000 00000000 00000000
[    2.275598] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    2.283729] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    2.290333] ---[ end trace ca5d506728a0581a ]---

devlink_free is complaining right here:

	WARN_ON(!list_empty(&devlink->port_list));

This happens because devlink_port_unregister is no longer done right
away in dsa_port_setup when a DSA_PORT_TYPE_USER has failed.
Vivien said about this change that:

    Also no need to call devlink_port_unregister from within dsa_port_setup
    as this step is inconditionally handled by dsa_port_teardown on error.

which is not really true. The devlink_port_unregister function _is_
being called unconditionally from within dsa_port_setup, but not for
this port that just failed, just for the previous ones which were set
up.

ports_teardown:
	for (i = 0; i < port; i++)
		dsa_port_teardown(&ds->ports[i]);

Initially I was tempted to fix this by extending the "for" loop to also
cover the port that failed during setup. But this could have potentially
unforeseen consequences unrelated to devlink_port or even other types of
ports than user ports, which I can't really test for. For example, if
for some reason devlink_port_register itself would fail, then
unconditionally unregistering it in dsa_port_teardown would not be a
smart idea. The list might go on.

So just make dsa_port_setup undo the setup it had done upon failure, and
let the for loop undo the work of setting up the previous ports, which
are guaranteed to be brought up to a consistent state.

Fixes: 955222ca ("net: dsa: use a single switch statement for port setup")
Signed-off-by: default avatarVladimir Oltean <olteanv@gmail.com>
Reviewed-by: default avatarVivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4ba0ebbc
    • Jiri Pirko's avatar
      mlx5: Add missing init_net check in FIB notifier · a21cf11b
      Jiri Pirko authored 
      Take only FIB events that are happening in init_net into account. No other
namespaces are supported.
Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
Acked-by: default avatarRoi Dayan <roid@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a21cf11b
    • David S. Miller's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net · 765b7590
      David S. Miller authored 
      r8152 conflicts are the NAPI fixes in 'net' overlapping with
some tasklet stuff in net-next
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      765b7590
    • Linus Torvalds's avatar
      Linux 5.3-rc7 · 089cf7f6
      Linus Torvalds authored
      089cf7f6
    • Linus Torvalds's avatar
      Merge tag 'char-misc-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc · 49ffdb4c
      Linus Torvalds authored 
      Pull char/misc driver fixes from Greg KH:
 "Here are some small char and misc driver fixes for reported issues for
  5.3-rc7

  Also included in here is the documentation for how we are handling
  hardware issues under embargo that everyone has finally agreed on, as
  well as a MAINTAINERS update for the suckers who agreed to handle the
  LICENSES/ files.

  All of these have been in linux-next last week with no reported
  issues"

* tag 'char-misc-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  fsi: scom: Don't abort operations for minor errors
  vmw_balloon: Fix offline page marking with compaction
  VMCI: Release resource if the work is already queued
  Documentation/process: Embargoed hardware security issues
  lkdtm/bugs: fix build error in lkdtm_EXHAUST_STACK
  mei: me: add Tiger Lake point LP device ID
  intel_th: pci: Add Tiger Lake support
  intel_th: pci: Add support for another Lewisburg PCH
  stm class: Fix a double free of stm_source_device
  MAINTAINERS: add entry for LICENSES and SPDX stuff
  fpga: altera-ps-spi: Fix getting of optional confd gpio
      49ffdb4c
    • Linus Torvalds's avatar
      Merge tag 'usb-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · 2c248f92
      Linus Torvalds authored 
      Pull USB fixes from Greg KH:
 "Here are some small USB fixes that have been in linux-next this past
  week for 5.3-rc7

  They fix the usual xhci, syzbot reports, and other small issues that
  have come up last week.

  All have been in linux-next with no reported issues"

* tag 'usb-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: cdc-wdm: fix race between write and disconnect due to flag abuse
  usb: host: xhci: rcar: Fix typo in compatible string matching
  usb: host: xhci-tegra: Set DMA mask correctly
  USB: storage: ums-realtek: Whitelist auto-delink support
  USB: storage: ums-realtek: Update module parameter description for auto_delink_en
  usb: host: ohci: fix a race condition between shutdown and irq
  usb: hcd: use managed device resources
  typec: tcpm: fix a typo in the comparison of pdo_max_voltage
  usb-storage: Add new JMS567 revision to unusual_devs
  usb: chipidea: udc: don't do hardware access if gadget has stopped
  usbtmc: more sanity checking for packet size
  usb: udc: lpc32xx: silence fall-through warning
      2c248f92
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net · 345464fb
      Linus Torvalds authored 
      Pull networking fixes from David Miller:

 1) Fix some length checks during OGM processing in batman-adv, from
    Sven Eckelmann.

 2) Fix regression that caused netfilter conntrack sysctls to not be
    per-netns any more. From Florian Westphal.

 3) Use after free in netpoll, from Feng Sun.

 4) Guard destruction of pfifo_fast per-cpu qdisc stats with
    qdisc_is_percpu_stats(), from Davide Caratti. Similar bug is fixed
    in pfifo_fast_enqueue().

 5) Fix memory leak in mld_del_delrec(), from Eric Dumazet.

 6) Handle neigh events on internal ports correctly in nfp, from John
    Hurley.

 7) Clear SKB timestamp in NF flow table code so that it does not
    confuse fq scheduler. From Florian Westphal.

 8) taprio destroy can crash if it is invoked in a failure path of
    taprio_init(), because the list head isn't setup properly yet and
    the list del is unconditional. Perform the list add earlier to
    address this. From Vladimir Oltean.

 9) Make sure to reapply vlan filters on device up, in aquantia driver.
    From Dmitry Bogdanov.

10) sgiseeq driver releases DMA memory using free_page() instead of
    dma_free_attrs(). From Christophe JAILLET.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (58 commits)
  net: seeq: Fix the function used to release some memory in an error handling path
  enetc: Add missing call to 'pci_free_irq_vectors()' in probe and remove functions
  net: bcmgenet: use ethtool_op_get_ts_info()
  tc-testing: don't hardcode 'ip' in nsPlugin.py
  net: dsa: microchip: add KSZ8563 compatibility string
  dt-bindings: net: dsa: document additional Microchip KSZ8563 switch
  net: aquantia: fix out of memory condition on rx side
  net: aquantia: linkstate irq should be oneshot
  net: aquantia: reapply vlan filters on up
  net: aquantia: fix limit of vlan filters
  net: aquantia: fix removal of vlan 0
  net/sched: cbs: Set default link speed to 10 Mbps in cbs_set_port_rate
  taprio: Set default link speed to 10 Mbps in taprio_set_picos_per_byte
  taprio: Fix kernel panic in taprio_destroy
  net: dsa: microchip: fill regmap_config name
  rxrpc: Fix lack of conn cleanup when local endpoint is cleaned up [ver #2]
  net: stmmac: dwmac-rk: Don't fail if phy regulator is absent
  amd-xgbe: Fix error path in xgbe_mod_init()
  netfilter: nft_meta_bridge: Fix get NFT_META_BRI_IIFVPROTO in network byteorder
  mac80211: Correctly set noencrypt for PAE frames
  ...
      345464fb
  5. 01 Sep, 2019 5 commits
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