[dpdk-dev] [PATCH v7 0/4] net/mlx5: implicit mempool registration

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

MLX5 hardware has its internal IOMMU where PMD registers the memory.
On the data path, PMD translates VA into a key consumed by the device
IOMMU.  It is impractical for the PMD to register all allocated memory
because of increased lookup cost both in HW and SW.  Most often mbuf
memory comes from mempools, so if PMD tracks them, it can almost always
have mbuf memory registered before an mbuf hits the PMD. This patchset
adds such tracking in the PMD and internal API to support it.

Please see [1] for the discussion of the patch 2/4
and how it can be useful outside of the MLX5 PMD.

[1]: http://inbox.dpdk.org/dev/CH0PR12MB509112FADB778AB28AF3771DB9F99@CH0PR12MB5091.namprd12.prod.outlook.com/

v7 (internal CI):
    1. Fix unit test compilation issues with GCC.
    2. Keep rte_mempool_event description non-internal: Doxygen treats
       it as not documented otherwise, "doc" target fails.
v6:
    Fix compilation issue in proc-info (CI).
v5:
    1. Change non-IO flag inference + various fixes (Andrew).
    2. Fix callback unregistration from secondary processes (Olivier).
    3. Support non-IO flag in proc-dump (David).
    4. Fix the usage of locks (Olivier).
    5. Avoid resource leaks in unit test (Olivier).
v4: (Andrew)
    1. Improve mempool event callbacks unit tests and documentation.
    2. Make MEMPOOL_F_NON_IO internal and automatically inferred.
       Add unit tests for the inference logic.
v3: Improve wording and naming; fix typos (Thomas).
v2 (internal review and testing):
    1. Change tracked mempool event from being created (CREATE) to being
       fully populated (READY), which is the state PMD is interested in.
    2. Unit test the new mempool callback API.
    3. Remove bogus "error" messages in normal conditions.
    4. Fixes in PMD.

Dmitry Kozlyuk (4):
  mempool: add event callbacks
  mempool: add non-IO flag
  common/mlx5: add mempool registration facilities
  net/mlx5: support mempool registration

 app/proc-info/main.c                   |   6 +-
 app/test/test_mempool.c                | 360 +++++++++++++++
 doc/guides/nics/mlx5.rst               |  13 +
 doc/guides/rel_notes/release_21_11.rst |   9 +
 drivers/common/mlx5/mlx5_common_mp.c   |  50 +++
 drivers/common/mlx5/mlx5_common_mp.h   |  14 +
 drivers/common/mlx5/mlx5_common_mr.c   | 580 +++++++++++++++++++++++++
 drivers/common/mlx5/mlx5_common_mr.h   |  17 +
 drivers/common/mlx5/version.map        |   5 +
 drivers/net/mlx5/linux/mlx5_mp_os.c    |  44 ++
 drivers/net/mlx5/linux/mlx5_os.c       |   4 +-
 drivers/net/mlx5/mlx5.c                | 152 +++++++
 drivers/net/mlx5/mlx5.h                |  10 +
 drivers/net/mlx5/mlx5_mr.c             | 120 ++---
 drivers/net/mlx5/mlx5_mr.h             |   2 -
 drivers/net/mlx5/mlx5_rx.h             |  21 +-
 drivers/net/mlx5/mlx5_rxq.c            |  13 +
 drivers/net/mlx5/mlx5_trigger.c        |  77 +++-
 drivers/net/mlx5/windows/mlx5_os.c     |   1 +
 lib/mempool/rte_mempool.c              | 134 ++++++
 lib/mempool/rte_mempool.h              |  64 +++
 lib/mempool/version.map                |   8 +
 22 files changed, 1586 insertions(+), 118 deletions(-)

-- 
2.25.1