RFC Allow parallel devlink execution

From: Leon Romanovsky <[email protected]>

Jakub, this is RFC, not fully tested and not reviewed yet. I'm sending it to show that first we need to fix internal devlink locking before even thinking of exporting it to the drivers.

-------------------------------------------------------------------
Hi,

This is final piece of devlink locking puzzle, where I remove global mutex lock (devlink_mutex) and reduce scope of devlink->lock. The last change allows us to make sure that devlink commands are called while devlink_reload is executed and protected at the same time.

All of the changes mentioned above are limited to devlink.c without any need to update drivers or expose internal details of devlink implementation.

The diffstat is misleading here, because of initial cleanup of overly engineered interfaces.

BTW, I have one extra patch that documents devlink locking.

Thanks

Leon Romanovsky (16):
devlink: Remove misleading internal_flags from health reporter dump
devlink: Delete useless checks of holding devlink lock
devlink: Simplify devlink resources unregister call
devlink: Clean registration of devlink port
devlink: Be explicit with devlink port protection
devlink: Reshuffle resource registration logic
devlink: Inline sb related functions
devlink: Protect resource list with specific lock
devlink: Protect all traps lists with specialized lock
devlink: Separate region list protection to be done with specialized
lock
devlink: Protect all rate operations with specialized lock
devlink: Protect all sb operations with specialized lock
devlink: Convert dpipe to use dpipe_lock
devlink: Require devlink lock during device reload
devlink: Use xarray locking mechanism instead big devlink lock
devlink: Open devlink to parallel operations

 .../net/ethernet/broadcom/bnxt/bnxt_devlink.c |   7 +-
 .../freescale/dpaa2/dpaa2-eth-devlink.c       |   7 +-
 drivers/net/ethernet/intel/ice/ice_devlink.c  |  18 +-
 .../marvell/prestera/prestera_devlink.c       |   7 +-
 drivers/net/ethernet/mellanox/mlx4/main.c     |   4 +-
 .../ethernet/mellanox/mlx5/core/en/devlink.c  |   5 +-
 .../ethernet/mellanox/mlx5/core/en/devlink.h  |   2 +-
 .../net/ethernet/mellanox/mlx5/core/en_main.c |   7 +-
 .../mellanox/mlx5/core/esw/devlink_port.c     |   9 +-
 drivers/net/ethernet/mellanox/mlxsw/core.c    |  15 +-
 .../net/ethernet/mellanox/mlxsw/spectrum.c    |   4 +-
 drivers/net/ethernet/mscc/ocelot_net.c        |   4 +-
 .../net/ethernet/netronome/nfp/nfp_devlink.c  |   4 +-
 .../ethernet/pensando/ionic/ionic_devlink.c   |   8 +-
 drivers/net/ethernet/ti/am65-cpsw-nuss.c      |  14 +-
 drivers/net/netdevsim/dev.c                   |  11 +-
 include/net/devlink.h                         |   9 +-
 net/core/devlink.c                            | 938 ++++++++++--------
 net/dsa/dsa.c                                 |   2 +-
 net/dsa/dsa2.c                                |   9 +-
 20 files changed, 561 insertions(+), 523 deletions(-)

2.33.1