[Bug 195078] em tx_dma_fails and dropped packets

Wed Jan 27 22:32:09 UTC 2016

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195078

--- Comment #6 from commit-hook at freebsd.org ---
A commit references this bug:

Author: marius
Date: Wed Jan 27 22:31:09 UTC 2016
New revision: 294958
URL: https://svnweb.freebsd.org/changeset/base/294958

Log:
  Sync the e1000 drivers with what's in head as of r294327, modulo parts
  that don't apply to stable/10 (driver API, if_inc_counter(), RSS changes
  etc.) and modulo r287465 (which reportedly breaks igb(4)), i. e. assorted
  fixes and improvements only:

  o MFC r267385 (partial):
    - Don't compare bus_dma map pointers for static DMA allocations against
      NULL to determine if bus_dmamap_unload() or bus_dmamem_free() should be
      called. Instead, check the associated bus and virtual addresses.
    - Don't clear static DMA maps to NULL.
  o MFC r284933:
    Delete the refernce to VLAN handling being disabled by default. This is
    no longer the case. [1]
  o MFC r285639:
    Add an adapter CORE lock in the DDB hook em_dump_queue to avoid WITNESS
    panic in em_init_locked() while debugging.
  o MFC r285879:
    - Remove unused txd_saved.
    - Intialize txd_upper, txd_lower and txd_used at declaration.
  o MFC r286162:
    Free mbufs when busdma loading fails.
  o MFC r286829:
    Add capability to disable CRC stripping as it breaks IPMI/BMC capabilities
    on certain adatpers. [2]
  o MFC r286831: [3]
    - Increase EM_MAX_SCATTER to 64 such that the size of em_xmit()::
      segs[EM_MAX_SCATTER] doesn't get overrun by things like NFS that can
      and do shove more than 32 segs when being used with em(4) and TSO4.
    - Update tso handling code in em_xmit() with update from jhb@
    - Set if_hw_tsomax, if_hw_tsomaxsegcount and if_hw_tsomaxsegsize to
      appropriate values.
    - Define a TSO workaround "magic" number of 4 that is used to avoid an
      alignment issue in hardware.
    - Change a couple of integer values that were used as booleans to actual
      bool types.
    - Ensure that em_enable_intr() enables the appropriate mask of interrupts
      and not just a hardcoded define of values.
  o MFC r286832:
    e1000/if_lem.c bump to 1.1.0
  o MFC r286833:
    Bump all copywrite dates to 2015.
  o MFC r287112:
    Style/whitespace cleanup in shared/common code.
  o MFC r293331:
    - Switch em(4) to the extended RX descriptor format.
    - Split rxbuffer and txbuffer apart to support the new RX descriptor
      format structures. Move rxbuffer manipulation to em_setup_rxdesc() to
      unify the new behavior changes.
    - Add a RSSKEYLEN macro for help in generating the RSSKEY data structures
      in the card.
    - Change em_receive_checksum() to process the new rxdescriptor format
      status bit.
  o MFC r293332:
    Disable the reuse of checksum offload context descriptors in the case
    of multiple queues in em(4). Document errata in the code.
  o MFC r293854:
    Given that em(4), lem(4) and igb(4) hardware doesn't require the
    alignment guarantees provided by m_defrag(9), use m_collapse(9)
    instead for performance reasons.
    While at it, sanitize the statistics softc members, i. e. retire
    unused ones and add SYSCTL nodes missing for actually used ones.

  PR:   118693 [1], 161277 [2], 195078 [3], 199174 [3], 200221 [3]

Changes:
_U  stable/10/
  stable/10/share/man/man4/em.4
  stable/10/sys/dev/e1000/e1000_80003es2lan.c
  stable/10/sys/dev/e1000/e1000_80003es2lan.h
  stable/10/sys/dev/e1000/e1000_82540.c
  stable/10/sys/dev/e1000/e1000_82541.c
  stable/10/sys/dev/e1000/e1000_82541.h
  stable/10/sys/dev/e1000/e1000_82542.c
  stable/10/sys/dev/e1000/e1000_82543.c
  stable/10/sys/dev/e1000/e1000_82543.h
  stable/10/sys/dev/e1000/e1000_82571.c
  stable/10/sys/dev/e1000/e1000_82571.h
  stable/10/sys/dev/e1000/e1000_82575.c
  stable/10/sys/dev/e1000/e1000_82575.h
  stable/10/sys/dev/e1000/e1000_api.c
  stable/10/sys/dev/e1000/e1000_api.h
  stable/10/sys/dev/e1000/e1000_defines.h
  stable/10/sys/dev/e1000/e1000_hw.h
  stable/10/sys/dev/e1000/e1000_i210.c
  stable/10/sys/dev/e1000/e1000_i210.h
  stable/10/sys/dev/e1000/e1000_ich8lan.c
  stable/10/sys/dev/e1000/e1000_ich8lan.h
  stable/10/sys/dev/e1000/e1000_mac.c
  stable/10/sys/dev/e1000/e1000_mac.h
  stable/10/sys/dev/e1000/e1000_manage.c
  stable/10/sys/dev/e1000/e1000_manage.h
  stable/10/sys/dev/e1000/e1000_mbx.c
  stable/10/sys/dev/e1000/e1000_mbx.h
  stable/10/sys/dev/e1000/e1000_nvm.c
  stable/10/sys/dev/e1000/e1000_nvm.h
  stable/10/sys/dev/e1000/e1000_osdep.c
  stable/10/sys/dev/e1000/e1000_osdep.h
  stable/10/sys/dev/e1000/e1000_phy.c
  stable/10/sys/dev/e1000/e1000_phy.h
  stable/10/sys/dev/e1000/e1000_regs.h
  stable/10/sys/dev/e1000/e1000_vf.c
  stable/10/sys/dev/e1000/e1000_vf.h
  stable/10/sys/dev/e1000/if_em.c
  stable/10/sys/dev/e1000/if_em.h
  stable/10/sys/dev/e1000/if_igb.c
  stable/10/sys/dev/e1000/if_igb.h
  stable/10/sys/dev/e1000/if_lem.c
  stable/10/sys/dev/e1000/if_lem.h
  stable/10/sys/dev/ixgb/if_ixgb.c
  stable/10/sys/dev/netmap/if_em_netmap.h

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