[v8,0/9] ethdev: support SubFunction representor

  SubFunction [1] is a portion of the PCI device, a SF netdev has its own
dedicated queues(txq, rxq). A SF netdev supports E-Switch representation
offload similar to existing PF and VF representors. A SF shares PCI
level resources with other SFs and/or with its parent PCI function.

From SmartNIC perspective, when PCI device is shared for multi-host,
representors for host controller and host PF is required.

This patch set introduces new representor types in addtion to existing
VF representor. Syntax:

[[c#]pf#]vf#: VF port representor/s from controller/pf
[[c#]pf#]sf#: SF port representor/s from controller/pf
#: VF representor - for backwards compatibility

"#" is number instance, list or range, valid examples:
  1, [1,3,5], [0-3], [0,2-4,6]

For backward compatibility, this patch also introduces new netdev
capability to indicate the capability of supportting SF representor.

Version history:
 RFC:
 	initial version [2]
 V2:
    - separate patch for represnetor infrastructure, controller, pf and
      sf.
    - replace representor ID macro with functions:
      rte_eth_representor_id_encode()
      rte_eth_representor_id_parse()
    - new patch to allow devargs with same PCI BDF but different
      representors.
    - other minor code updates according to comments, thanks Andrew!
    - update document
 V3:
    - improve probing of allowed devargs with same name.
    - parse single word of kvargs as key.
    - update kvargs test cases.
 V4:
    - split first representor refactor patch into
      1: add representor type
      2: refector representor list parsing
    - push the patch supporting multi-devargs for same device.
 V5:
    - add comments for parsing functions
    - update switch_representation.rst - Thanks Ajit
 V6:
    - split representor types into different patches, move to
      rte_ethdev.h
    - improvements of rte_eth_devargs_process_list() according to
      Andrew's suggestion
    - fixed PF probe failure for Intel i40e
    - replace ethdev SF capability with rte_eth_representor_info_get()
    - add new ethdev ops api to get representor info from PMD
    - replace representor ID encode/decode with conversion from
      representor info
    - change ethdev representor iterator to use new ID encoding
 V7:
    - error on duplicated representor argument:
      DBDF,representor=a,representor=b
    - fix pf representor type parsing
    - other small fixes suggested by Andrew.
 V8:
 	- remove the "ignore" hint from pmd representor info
 	- changed representor_id type in representor info to u32
 	- rename rte_eth_representor_id_convert() to ..._get()
 	- other small fixes suggested by Andrew
   


[1] SubFunction in kernel:
https://lore.kernel.org/netdev/20201112192424.2742-1-parav@nvidia.com/

[2] RFC:
http://patchwork.dpdk.org/project/dpdk/list/?series=14376

[3] V2:
http://patchwork.dpdk.org/project/dpdk/list/?series=14559

[4] V3:
1 http://patchwork.dpdk.org/patch/86460/
2 http://patchwork.dpdk.org/patch/86461/
3 http://patchwork.dpdk.org/patch/86462/
4 http://patchwork.dpdk.org/patch/86463/
5 http://patchwork.dpdk.org/patch/86464/
6 http://patchwork.dpdk.org/patch/86465/
7 http://patchwork.dpdk.org/patch/86467/
8 http://patchwork.dpdk.org/patch/86466/
9 http://patchwork.dpdk.org/patch/86468/

[5] V4:
http://patchwork.dpdk.org/project/dpdk/list/?series=14809

[6] V5:
http://patchwork.dpdk.org/project/dpdk/list/?series=14834

[7] V6:
http://patchwork.dpdk.org/project/dpdk/list/?series=15258

[8] v7:
http://patchwork.dpdk.org/project/dpdk/list/?series=15441

Xueming Li (9):
  ethdev: introduce representor type
  ethdev: support representor port list
  ethdev: support new VF representor syntax
  ethdev: support sub function representor
  ethdev: support PF index in representor
  ethdev: support multi-host in representor
  ethdev: new API to get representor info
  ethdev: representor iterator compare complete info
  kvargs: update parser to support lists

 app/test/test_kvargs.c                        |  46 ++++-
 config/rte_config.h                           |   1 +
 doc/guides/prog_guide/poll_mode_drv.rst       |  18 +-
 .../prog_guide/switch_representation.rst      |  35 ++--
 drivers/net/bnxt/bnxt_ethdev.c                |   7 +
 drivers/net/enic/enic_ethdev.c                |   6 +
 drivers/net/i40e/i40e_ethdev.c                |   7 +
 drivers/net/ixgbe/ixgbe_ethdev.c              |   7 +
 drivers/net/mlx5/linux/mlx5_os.c              |  11 ++
 lib/librte_ethdev/ethdev_driver.h             |  50 +++++-
 lib/librte_ethdev/ethdev_private.c            | 169 ++++++++++++------
 lib/librte_ethdev/ethdev_private.h            |   3 -
 lib/librte_ethdev/rte_class_eth.c             |  40 +++--
 lib/librte_ethdev/rte_ethdev.c                | 113 +++++++++++-
 lib/librte_ethdev/rte_ethdev.h                |  61 +++++++
 lib/librte_ethdev/version.map                 |   4 +
 lib/librte_kvargs/rte_kvargs.c                | 101 ++++++++---
 17 files changed, 554 insertions(+), 125 deletions(-)