[dpdk-dev] [PATCH v4 0/3] Fix incorrect max TX queue numbers for ixgbe

[Pablo de Lara]

IXGBE supports 128 TX queues. However, the full 128 queues
are only available in VT and DCB mode.
In normal default "none" mode (VT/DCB off) the maximum number
of available queues is only 64.
IXGBE doesn't check the mode when reporting the available
number of queues. If a queue larger than 64 is used in default mode,
the TX packets will be dropped silently.

This patchset:

- Modifies the device info to show the correct maximum number of available TX queues,
  depending on the mode.

- Adds a check to forbid using a queue number larger than 64
  during device configuration (in default mode), so that the problem is
  reported as early as possible.

- It also changes the order of where the dev_conf parameters are copied
  into the dev structure so that the correct maximum number of queues
  is reported for the correct mode.

Changes in v4:
- Split the patch in three smaller patches
- Updated release notes document

Changes in v3:
- Fixed wrong set of TX queues for 82596EB

Changes in v2:

- Reorder memcpy of device configuration in rte_eth_dev_configure(),
  so function gets the correct maximum number of queues
  (depending on the operation mode), before checking the
  requested number of queues.
- Renamed new macro
- Reworded/wrapped commit message

Pablo de Lara (1):
  ethdev: copy device configuration earlier

Wenzhuo Lu (2):
  ixgbe: fix incorrect tx queue number assignment
  ixgbe: fix incorrect max tx queue number

 doc/guides/rel_notes/release_16_04.rst |  6 ++++++
 drivers/net/ixgbe/ixgbe_ethdev.c       | 22 +++++++++++++++++++++-
 drivers/net/ixgbe/ixgbe_ethdev.h       |  1 +
 lib/librte_ether/rte_ethdev.c          |  6 +++---
 4 files changed, 31 insertions(+), 4 deletions(-)

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2.5.5