[dpdk-dev] [PATCH v3 0/6] Flow entites behavior on port restart

[Dmitry Kozlyuk <dkozlyuk@oss.nvidia.com>]

It is unspecified whether flow rules and indirect actions are kept
when a port is stopped, possibly reconfigured, and started again.
Vendors approach the topic differently, e.g. mlx5 and i40e PMD
disagree in whether flow rules can be kept, and mlx5 PMD would keep
indirect actions. In the end, applications are greatly affected
by whatever contract there is and need to know it.

It is proposed to advertise capabilities of keeping flow rules
and indirect actions (as a special case of shared object)
using a combination of ethdev info and rte_flow calls.
Then a bug is fixed in mlx5 PMD that prevented indirect RSS action
from being kept, and the driver starts advertising the new capability.

Prior discussions:
1) http://inbox.dpdk.org/dev/20210727073121.895620-1-dkozlyuk@nvidia.com/
2) http://inbox.dpdk.org/dev/20210901085516.3647814-1-dkozlyuk@nvidia.com/

v3:  1. Add a patch 3/6 to update all PMDs that implement rte_flow
        with an explicit reset of the new capability (Ferruh).
     2. Change how the support of keeping particular kinds
        of flow rules is determined, improve wording (Andrew).
     3. Do not require keeping rules and indirect actions
        across reconfiguration (Qi Zhang).
     4. Improve wording (Ori).

Dmitry Kozlyuk (6):
  ethdev: add capability to keep flow rules on restart
  ethdev: add capability to keep shared objects on restart
  net: advertise no support for keeping flow rules
  net/mlx5: discover max flow priority using DevX
  net/mlx5: create drop queue using DevX
  net/mlx5: preserve indirect actions on restart

 doc/guides/prog_guide/rte_flow.rst      |  49 ++++
 drivers/net/bnxt/bnxt_ethdev.c          |   1 +
 drivers/net/bnxt/bnxt_reps.c            |   1 +
 drivers/net/cnxk/cnxk_ethdev_ops.c      |   1 +
 drivers/net/cxgbe/cxgbe_ethdev.c        |   2 +
 drivers/net/dpaa2/dpaa2_ethdev.c        |   1 +
 drivers/net/e1000/em_ethdev.c           |   2 +
 drivers/net/e1000/igb_ethdev.c          |   1 +
 drivers/net/enic/enic_ethdev.c          |   1 +
 drivers/net/failsafe/failsafe_ops.c     |   1 +
 drivers/net/hinic/hinic_pmd_ethdev.c    |   2 +
 drivers/net/hns3/hns3_ethdev.c          |   1 +
 drivers/net/hns3/hns3_ethdev_vf.c       |   1 +
 drivers/net/i40e/i40e_ethdev.c          |   1 +
 drivers/net/i40e/i40e_vf_representor.c  |   2 +
 drivers/net/iavf/iavf_ethdev.c          |   1 +
 drivers/net/ice/ice_dcf_ethdev.c        |   1 +
 drivers/net/igc/igc_ethdev.c            |   1 +
 drivers/net/ipn3ke/ipn3ke_representor.c |   1 +
 drivers/net/mlx5/linux/mlx5_os.c        |   5 -
 drivers/net/mlx5/mlx5_devx.c            | 211 ++++++++++++++---
 drivers/net/mlx5/mlx5_ethdev.c          |   1 +
 drivers/net/mlx5/mlx5_flow.c            | 292 ++++++++++++++++++++++--
 drivers/net/mlx5/mlx5_flow.h            |   6 +
 drivers/net/mlx5/mlx5_flow_dv.c         | 103 +++++++++
 drivers/net/mlx5/mlx5_flow_verbs.c      |  77 +------
 drivers/net/mlx5/mlx5_rx.h              |   4 +
 drivers/net/mlx5/mlx5_rxq.c             |  99 +++++++-
 drivers/net/mlx5/mlx5_trigger.c         |  10 +
 drivers/net/mvpp2/mrvl_ethdev.c         |   2 +
 drivers/net/octeontx2/otx2_ethdev_ops.c |   1 +
 drivers/net/qede/qede_ethdev.c          |   1 +
 drivers/net/sfc/sfc_ethdev.c            |   1 +
 drivers/net/softnic/rte_eth_softnic.c   |   1 +
 drivers/net/tap/rte_eth_tap.c           |   1 +
 drivers/net/txgbe/txgbe_ethdev.c        |   1 +
 drivers/net/txgbe/txgbe_ethdev_vf.c     |   1 +
 lib/ethdev/rte_ethdev.h                 |  10 +
 lib/ethdev/rte_flow.h                   |   1 +
 39 files changed, 762 insertions(+), 137 deletions(-)

-- 
2.25.1