[Qemu-devel] [PATCH v6 0/9] e1000: Various fixes and registers' implementation

[Leonid Bloch]

This series fixes issues with packet/octet counting in e1000's Statistic
registers, fixes a bug in the packet address filtering procedure, and
implements many MAC registers that were absent before, some Statistic
counters among them.

Besides this, the series introduces a parameter which, if set to "on"
(default), will cause the entire MAC registers' array to migrate during
live migration (please see patches #2 and #9 for details). The rational
behind this is the ability to implement additional MAC registers in the
future, without worrying about migration compatibility between future
versions. For compatibility with previous versions, the above mentioned
parameter can be set to "off".

Also, a new array is introduced to control the access to the various MAC
registers. This takes care of situations when a MAC register requires a
certain parameter to be accessed, or is partially implemented, and
requires a debug warning to be printed on access attempts.

Additionally, several cosmetic changes are made.

Differences v1-2:
--------------------
* Wording of several commit messages corrected.
* For trivially implemented Diagnostic registers, a debug message is
  added on read/write attempts, alerting of incomplete implementation.
* Following testing on a physical device, only the lower 16 bits can now
  be read from AIT, and only the lower 4 - from FFMT*.
* The grow_8reg_if_not_full function is rewritten.
* inc_tx_bcast_or_mcast_count and increase_size_stats are now called
  from within e1000_send_packet, to avoid code duplication.

Differences v2-3:
--------------------
* Minor rewordings of some commit messages (0002, 0003).
* Live migration capability is added to the newly implemented registers.

Differences v3-4:
--------------------
* Introduction of the "full_mac_registers" parameter (see above).
* Reversion of the live migration handling introduced in v3.
* Small alignment changes in patch #1 to correspond with the following
  patches.

Differences v4-v5:
--------------------
* Introduction of an array to control the access to the MAC registers.
* Removal of the specific functions that warned of partial
  implementation on read/write from patch 4.
* Adequate changes to patches 4 and 8: mainly adding the registers
  introduced there to the new array.

Differences v5-v6:
--------------------
* The access control array now does not contain an "always accessible"
  bit. The assumption that a register is always accessible is based now
  solely on the facts that it has a read or write handler, and it does
  not require a flag to be set. That also makes place for 6 possible
  flag bits in the access control array, instead of 5 in v5.
* The support for backward compatibility, nor the new registers
  introduced in this series, can not be turned on now until the last
  patch in this series is applied. This is done to preserve
  compatibility if bisection in-between the patches of this series will
  be needed.

The majority of these changes result from Jason Wang's review - thank
you, Jason!

Leonid Bloch (9):
  e1000: Cosmetic and alignment fixes
  e1000: Add support for migrating the entire MAC registers' array
  e1000: Introduced an array to control the access to the MAC registers
  e1000: Trivial implementation of various MAC registers
  e1000: Fixing the received/transmitted packets' counters
  e1000: Fixing the received/transmitted octets' counters
  e1000: Fixing the packet address filtering procedure
  e1000: Implementing various counters
  e1000: Introducing backward compatibility command line parameter

 hw/net/e1000.c      | 476 ++++++++++++++++++++++++++++++++++++++++------------
 hw/net/e1000_regs.h |   8 +-
 include/hw/compat.h |   4 +
 3 files changed, 379 insertions(+), 109 deletions(-)

-- 
2.4.3