drivers/infiniband/hw/mlx5/restrack.c

   1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
   2 /*
   3  * Copyright (c) 2019, Mellanox Technologies inc.  All rights reserved.
   4  */
   5
   6 #include <uapi/rdma/rdma_netlink.h>
   7 #include <rdma/ib_umem_odp.h>
   8 #include <rdma/restrack.h>
   9 #include "mlx5_ib.h"
  10
  11 static int fill_stat_mr_entry(struct sk_buff *msg,
  12                               struct rdma_restrack_entry *res)
  13 {
  14         struct ib_mr *ibmr = container_of(res, struct ib_mr, res);
  15         struct mlx5_ib_mr *mr = to_mmr(ibmr);
  16         struct nlattr *table_attr;
  17
  18         if (!(mr->access_flags & IB_ACCESS_ON_DEMAND))
  19                 return 0;
  20
  21         table_attr = nla_nest_start(msg,
  22                                     RDMA_NLDEV_ATTR_STAT_HWCOUNTERS);
  23
  24         if (!table_attr)
  25                 goto err;
  26
  27         if (rdma_nl_stat_hwcounter_entry(msg, "page_faults",
  28                                          atomic64_read(&mr->odp_stats.faults)))
  29                 goto err_table;
  30         if (rdma_nl_stat_hwcounter_entry(
  31                     msg, "page_invalidations",
  32                     atomic64_read(&mr->odp_stats.invalidations)))
  33                 goto err_table;
  34
  35         nla_nest_end(msg, table_attr);
  36         return 0;
  37
  38 err_table:
  39         nla_nest_cancel(msg, table_attr);
  40 err:
  41         return -EMSGSIZE;
  42 }
  43
  44 static int fill_res_mr_entry(struct sk_buff *msg,
  45                              struct rdma_restrack_entry *res)
  46 {
  47         struct ib_mr *ibmr = container_of(res, struct ib_mr, res);
  48         struct mlx5_ib_mr *mr = to_mmr(ibmr);
  49         struct nlattr *table_attr;
  50
  51         if (!(mr->access_flags & IB_ACCESS_ON_DEMAND))
  52                 return 0;
  53
  54         table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_DRIVER);
  55         if (!table_attr)
  56                 goto err;
  57
  58         if (mr->is_odp_implicit) {
  59                 if (rdma_nl_put_driver_string(msg, "odp", "implicit"))
  60                         goto err;
  61         } else {
  62                 if (rdma_nl_put_driver_string(msg, "odp", "explicit"))
  63                         goto err;
  64         }
  65
  66         nla_nest_end(msg, table_attr);
  67         return 0;
  68
  69 err:
  70         nla_nest_cancel(msg, table_attr);
  71         return -EMSGSIZE;
  72 }
  73
  74 int mlx5_ib_fill_res_entry(struct sk_buff *msg,
  75                            struct rdma_restrack_entry *res)
  76 {
  77         if (res->type == RDMA_RESTRACK_MR)
  78                 return fill_res_mr_entry(msg, res);
  79
  80         return 0;
  81 }
  82
  83 int mlx5_ib_fill_stat_entry(struct sk_buff *msg,
  84                             struct rdma_restrack_entry *res)
  85 {
  86         if (res->type == RDMA_RESTRACK_MR)
  87                 return fill_stat_mr_entry(msg, res);
  88
  89         return 0;
  90 }