rdma/res-cq.c

   1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
   2 /*
   3  * res-cq.c     RDMA tool
   4  * Authors:     Leon Romanovsky <leonro@mellanox.com>
   5  */
   6
   7 #include "res.h"
   8 #include <inttypes.h>
   9
  10 static void print_cqe(struct rd *rd, uint32_t val)
  11 {
  12         if (rd->json_output)
  13                 jsonw_uint_field(rd->jw, "cqe", val);
  14         else
  15                 pr_out("cqe %u ", val);
  16 }
  17
  18 static const char *poll_ctx_to_str(uint8_t idx)
  19 {
  20         static const char * const cm_id_states_str[] = {
  21                 "DIRECT", "SOFTIRQ", "WORKQUEUE", "UNBOUND_WORKQUEUE"};
  22
  23         if (idx < ARRAY_SIZE(cm_id_states_str))
  24                 return cm_id_states_str[idx];
  25         return "UNKNOWN";
  26 }
  27
  28 static void print_poll_ctx(struct rd *rd, uint8_t poll_ctx)
  29 {
  30         if (rd->json_output) {
  31                 jsonw_string_field(rd->jw, "poll-ctx",
  32                                    poll_ctx_to_str(poll_ctx));
  33                 return;
  34         }
  35         pr_out("poll-ctx %s ", poll_ctx_to_str(poll_ctx));
  36 }
  37
  38 int res_cq_parse_cb(const struct nlmsghdr *nlh, void *data)
  39 {
  40         struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
  41         struct nlattr *nla_table, *nla_entry;
  42         struct rd *rd = data;
  43         const char *name;
  44         uint32_t idx;
  45
  46         mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
  47         if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_DEV_NAME] ||
  48             !tb[RDMA_NLDEV_ATTR_RES_CQ])
  49                 return MNL_CB_ERROR;
  50
  51         name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]);
  52         idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
  53         nla_table = tb[RDMA_NLDEV_ATTR_RES_CQ];
  54
  55         mnl_attr_for_each_nested(nla_entry, nla_table) {
  56                 struct nlattr *nla_line[RDMA_NLDEV_ATTR_MAX] = {};
  57                 char *comm = NULL;
  58                 uint32_t pid = 0;
  59                 uint8_t poll_ctx = 0;
  60                 uint32_t ctxn = 0;
  61                 uint32_t cqn = 0;
  62                 uint64_t users;
  63                 uint32_t cqe;
  64                 int err;
  65
  66                 err = mnl_attr_parse_nested(nla_entry, rd_attr_cb, nla_line);
  67                 if (err != MNL_CB_OK)
  68                         return MNL_CB_ERROR;
  69
  70                 if (!nla_line[RDMA_NLDEV_ATTR_RES_CQE] ||
  71                     !nla_line[RDMA_NLDEV_ATTR_RES_USECNT] ||
  72                     (!nla_line[RDMA_NLDEV_ATTR_RES_PID] &&
  73                      !nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME])) {
  74                         return MNL_CB_ERROR;
  75                 }
  76
  77                 cqe = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_CQE]);
  78
  79                 users = mnl_attr_get_u64(nla_line[RDMA_NLDEV_ATTR_RES_USECNT]);
  80                 if (rd_check_is_filtered(rd, "users", users))
  81                         continue;
  82
  83                 if (nla_line[RDMA_NLDEV_ATTR_RES_POLL_CTX]) {
  84                         poll_ctx = mnl_attr_get_u8(
  85                                 nla_line[RDMA_NLDEV_ATTR_RES_POLL_CTX]);
  86                         if (rd_check_is_string_filtered(
  87                                     rd, "poll-ctx", poll_ctx_to_str(poll_ctx)))
  88                                 continue;
  89                 }
  90
  91                 if (nla_line[RDMA_NLDEV_ATTR_RES_PID]) {
  92                         pid = mnl_attr_get_u32(
  93                                 nla_line[RDMA_NLDEV_ATTR_RES_PID]);
  94                         comm = get_task_name(pid);
  95                 }
  96
  97                 if (rd_check_is_filtered(rd, "pid", pid)) {
  98                         free(comm);
  99                         continue;
 100                 }
 101
 102                 if (nla_line[RDMA_NLDEV_ATTR_RES_CQN])
 103                         cqn = mnl_attr_get_u32(
 104                                 nla_line[RDMA_NLDEV_ATTR_RES_CQN]);
 105                 if (rd_check_is_filtered(rd, "cqn", cqn))
 106                         continue;
 107
 108                 if (nla_line[RDMA_NLDEV_ATTR_RES_CTXN])
 109                         ctxn = mnl_attr_get_u32(
 110                                 nla_line[RDMA_NLDEV_ATTR_RES_CTXN]);
 111                 if (rd_check_is_filtered(rd, "ctxn", ctxn))
 112                         continue;
 113
 114                 if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME])
 115                         /* discard const from mnl_attr_get_str */
 116                         comm = (char *)mnl_attr_get_str(
 117                                 nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
 118
 119                 if (rd->json_output)
 120                         jsonw_start_array(rd->jw);
 121
 122                 print_dev(rd, idx, name);
 123                 print_cqe(rd, cqe);
 124                 print_users(rd, users);
 125                 if (nla_line[RDMA_NLDEV_ATTR_RES_POLL_CTX])
 126                         print_poll_ctx(rd, poll_ctx);
 127                 print_pid(rd, pid);
 128                 print_comm(rd, comm, nla_line);
 129
 130                 if (nla_line[RDMA_NLDEV_ATTR_RES_CQN])
 131                         res_print_uint(rd, "cqn", cqn);
 132                 if (nla_line[RDMA_NLDEV_ATTR_RES_CTXN])
 133                         res_print_uint(rd, "ctxn", ctxn);
 134
 135                 if (nla_line[RDMA_NLDEV_ATTR_RES_PID])
 136                         free(comm);
 137
 138                 print_driver_table(rd, nla_line[RDMA_NLDEV_ATTR_DRIVER]);
 139                 newline(rd);
 140         }
 141         return MNL_CB_OK;
 142 }
 143