[RFC PATCH v2 00/26] add meson config options for queues per port

[Bruce Richardson]

There are a number of issues with the current RTE_MAX_QUEUES_PER_PORT
setting in DPDK that are addressed by this patchset:

* The name does not make it clear that this is intended as an
  ethdev-only setting
* A number of other libraries are using this define rather than having
  more relevant defines for the particular usecase.
* The define is hard-coded in DPDK source code and is not adjustable via
  a build-time/meson option
* Because of the lack of configurability, the max is therefore set to a
  conservatively-high value, wasting memory.
* There is an assumption that the number of Rx queues and Tx queues
  should have the same maximum value. Depending on application, it may
  be desirable to have fan-in with multiple Rx queues e.g. for
  classification/filtering, feed a single Tx queue, or the opposite
  where, e.g. for QoS Tx scheduling, a few Rx queues feeds a very large
  number of Tx queues.

This patchset therefore addresses these by:

* replacing the single define for max queues with independent defines
  for Rx and Tx queues.
* adjusts the name to ensure that it is clear the defines are for
  ethports only. [ethports being used in the RTE_MAX_ETHPORTS setting].
* replaces occurances of RTE_MAX_QUEUES_PER_PORT with appropriate
  defines for non-ethdev use cases
* replaces all other internal occurances of the define with the new
  per-Rx and per-Tx definitions.
* adds meson config options to allow build-time configuration of the max
  Rx and Tx queue values.

Naming Note:
* The new meson config options are called "max_ethport_rx_queues" and
  "max_ethport_tx_queues" so that in the meson options list they appear
  alphabetically beside the existing "max_ethports" option.
* For naming consistency, the new C defines are therefore
  RTE_MAX_ETHPORT_RX_QUEUES and RTE_MAX_ETHPORT_TX_QUEUES.

V2:
* What was a single patch with "3 insertions(+), 1 deletion(-)" has now
  become a 26-patch set! :-)
* Created separate Rx and Tx defines
* Ensured that the name makes it clear that the define is for ethdev
* When updating internal use, created one patch per component for easier
  maintainer review. In most cases it was obvious whether Rx or Tx
  define should be used, but a few cases were less clear.
* Added documentation updates for the changes (release notes and
  deprecation notice), spread across 3 of the patches.

Bruce Richardson (26):
  cryptodev: remove use of ethdev max queues definition
  eventdev: remove use of ethev queues define
  app/test-bbdev: remove use of ethdev queue count value
  config: add separate defines for max Rx and Tx queues
  ethdev: use separate Rx and Tx queue limits
  bpf: use separate Rx and Tx queue limits
  latencystats: use separate Rx and Tx queue limits
  pdump: use separate Rx and Tx queue limits
  power: use separate Rx and Tx queue limits
  net/af_xdp: use separate Rx and Tx queue limits
  net/cnxk: use separate Rx and Tx queue limits
  net/failsafe: use separate Rx and Tx queue limits
  net/hns3: use separate Rx and Tx queue limits
  net/mlx5: use separate Rx and Tx queue limits
  net/null: use separate Rx and Tx queue limits
  net/sfc: use separate Rx and Tx queue limits
  net/thunderx: use separate Rx and Tx queue limits
  net/vhost: use separate Rx and Tx queue limits
  app/dumpcap: use separate Rx and Tx queue limits
  app/test-pmd: use separate Rx and Tx queue limits
  examples/ipsec-secgw: use separate Rx and Tx queue limits
  examples/l3fwd-power: use separate Rx and Tx queue limits
  examples/l3fwd: use separate Rx and Tx queue limits
  examples/vhost: use separate Rx and Tx queue limits
  config: make queues per port a meson config option
  config: add computed max queues define for compatibility

 app/dumpcap/main.c                     |  2 +-
 app/test-bbdev/test_bbdev.c            |  4 ++--
 app/test-pmd/testpmd.c                 |  7 ++++---
 app/test-pmd/testpmd.h                 | 16 ++++++++--------
 config/meson.build                     | 10 ++++++++++
 config/rte_config.h                    |  2 +-
 doc/guides/rel_notes/deprecation.rst   | 11 +++++++++++
 doc/guides/rel_notes/release_24_11.rst | 21 +++++++++++++++++++++
 drivers/net/af_xdp/rte_eth_af_xdp.c    |  2 +-
 drivers/net/cnxk/cnxk_ethdev_ops.c     |  4 ++--
 drivers/net/failsafe/failsafe_ops.c    |  4 ++--
 drivers/net/hns3/hns3_tm.c             |  2 +-
 drivers/net/mlx5/mlx5_flow.c           |  2 +-
 drivers/net/mlx5/mlx5_flow_hw.c        |  2 +-
 drivers/net/null/rte_eth_null.c        |  4 ++--
 drivers/net/sfc/sfc_sw_stats.c         |  6 ++++--
 drivers/net/thunderx/nicvf_ethdev.c    |  2 +-
 drivers/net/vhost/rte_eth_vhost.c      |  7 ++++---
 examples/ipsec-secgw/ipsec-secgw.c     |  2 +-
 examples/ipsec-secgw/ipsec.c           |  2 +-
 examples/l3fwd-power/main.c            |  2 +-
 examples/l3fwd-power/perf_core.c       |  2 +-
 examples/l3fwd/main.c                  |  2 +-
 examples/vhost/main.c                  |  2 +-
 examples/vhost/main.h                  |  2 +-
 lib/bpf/bpf_pkt.c                      |  3 ++-
 lib/cryptodev/cryptodev_pmd.c          |  4 ++--
 lib/ethdev/ethdev_driver.h             |  8 ++++----
 lib/ethdev/ethdev_private.c            | 24 ++++++++++++++----------
 lib/ethdev/rte_ethdev.c                | 16 +++++++---------
 lib/ethdev/rte_ethdev.h                | 18 +++++++++---------
 lib/eventdev/eventdev_private.c        |  2 +-
 lib/latencystats/rte_latencystats.c    |  4 ++--
 lib/pdump/rte_pdump.c                  | 18 +++++++++---------
 lib/power/rte_power_pmd_mgmt.c         |  4 ++--
 meson_options.txt                      |  4 ++++
 36 files changed, 140 insertions(+), 87 deletions(-)

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2.43.0