linux-kernel - [PATCH rdma-next 0/6] Use ib_umem_find_best

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Date:   Mon, 26 Oct 2020 15:26:29 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...dia.com>
Cc:     Leon Romanovsky <leonro@...dia.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eli Cohen <eli@...lanox.com>,
        Haggai Abramonvsky <hagaya@...lanox.com>,
        Jack Morgenstein <jackm@....mellanox.co.il>,
        linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org,
        "majd@...lanox.com" <majd@...lanox.com>,
        Matan Barak <matanb@...lanox.com>,
        Or Gerlitz <ogerlitz@...lanox.com>,
        Roland Dreier <roland@...estorage.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Yishai Hadas <yishaih@...lanox.com>
Subject: [PATCH rdma-next 0/6] Use ib_umem_find_best_pgsz() for all umems

From: Leon Romanovsky <leonro@...dia.com>

>From Jason:

Move the remaining cases working with umems to use versions of
ib_umem_find_best_pgsz() tailored to the calculations the devices
requires.

Unlike a MR there is no IOVA, instead a page offset from the starting page
is possible, with various restrictions.

Compute the best page size to meet the page_offset restrictions.

Thanks

Jason Gunthorpe (6):
  RDMA/mlx5: Use ib_umem_find_best_pgsz() for devx
  RDMA/mlx5: Use ib_umem_find_best_pgoff() for SRQ
  RDMA/mlx5: Use mlx5_umem_find_best_quantized_pgoff() for WQ
  RDMA/mlx5: Use mlx5_umem_find_best_quantized_pgoff() for QP
  RDMA/mlx5: mlx5_umem_find_best_quantized_pgoff() for CQ
  RDMA/mlx5: Lower setting the umem's PAS for SRQ

 drivers/infiniband/hw/mlx5/cq.c      |  48 ++++++++---
 drivers/infiniband/hw/mlx5/devx.c    |  56 ++++++------
 drivers/infiniband/hw/mlx5/mem.c     | 115 +++++++++----------------
 drivers/infiniband/hw/mlx5/mlx5_ib.h |  56 ++++++++++--
 drivers/infiniband/hw/mlx5/qp.c      | 124 ++++++++++++---------------
 drivers/infiniband/hw/mlx5/srq.c     |  27 +-----
 drivers/infiniband/hw/mlx5/srq.h     |   1 +
 drivers/infiniband/hw/mlx5/srq_cmd.c |  80 ++++++++++++++++-
 include/rdma/ib_umem.h               |  42 +++++++++
 9 files changed, 326 insertions(+), 223 deletions(-)

--
2.26.2