-/**
- * Read device counters table.
- *
- * @param priv
- * Pointer to private structure.
- * @param[out] stats
- * Counters table output buffer.
- *
- * @return
- * 0 on success and stats is filled, negative on error.
- */
-static int
-priv_read_dev_counters(struct priv *priv, uint64_t *stats)
-{
- struct mlx5_xstats_ctrl *xstats_ctrl = &priv->xstats_ctrl;
- unsigned int i;
- struct ifreq ifr;
- unsigned int stats_sz = (xstats_ctrl->stats_n * sizeof(uint64_t)) +
- sizeof(struct ethtool_stats);
- struct ethtool_stats et_stats[(stats_sz + (
- sizeof(struct ethtool_stats) - 1)) /
- sizeof(struct ethtool_stats)];
-
- et_stats->cmd = ETHTOOL_GSTATS;
- et_stats->n_stats = xstats_ctrl->stats_n;
- ifr.ifr_data = (caddr_t)et_stats;
- if (priv_ifreq(priv, SIOCETHTOOL, &ifr) != 0) {
- WARN("unable to read statistic values from device");
- return -1;
- }
- for (i = 0; i != xstats_n; ++i) {
- if (priv_is_ib_cntr(mlx5_counters_init[i].ctr_name))
- priv_get_cntr_sysfs(priv,
- mlx5_counters_init[i].ctr_name,
- &stats[i]);
- else
- stats[i] = (uint64_t)
- et_stats->data[xstats_ctrl->dev_table_idx[i]];
- }
- return 0;
-}
-
-/**
- * Init the structures to read device counters.
- *
- * @param priv
- * Pointer to private structure.
- */
-void
-priv_xstats_init(struct priv *priv)
-{
- struct mlx5_xstats_ctrl *xstats_ctrl = &priv->xstats_ctrl;
- unsigned int i;
- unsigned int j;
- char ifname[IF_NAMESIZE];
- struct ifreq ifr;
- struct ethtool_drvinfo drvinfo;
- struct ethtool_gstrings *strings = NULL;
- unsigned int dev_stats_n;
- unsigned int str_sz;
-
- if (priv_get_ifname(priv, &ifname)) {
- WARN("unable to get interface name");
- return;
- }
- /* How many statistics are available. */
- drvinfo.cmd = ETHTOOL_GDRVINFO;
- ifr.ifr_data = (caddr_t)&drvinfo;
- if (priv_ifreq(priv, SIOCETHTOOL, &ifr) != 0) {
- WARN("unable to get driver info");
- return;
- }
- dev_stats_n = drvinfo.n_stats;
- if (dev_stats_n < 1) {
- WARN("no extended statistics available");
- return;
- }
- xstats_ctrl->stats_n = dev_stats_n;
- /* Allocate memory to grab stat names and values. */
- str_sz = dev_stats_n * ETH_GSTRING_LEN;
- strings = (struct ethtool_gstrings *)
- rte_malloc("xstats_strings",
- str_sz + sizeof(struct ethtool_gstrings), 0);
- if (!strings) {
- WARN("unable to allocate memory for xstats");
- return;
- }
- strings->cmd = ETHTOOL_GSTRINGS;
- strings->string_set = ETH_SS_STATS;
- strings->len = dev_stats_n;
- ifr.ifr_data = (caddr_t)strings;
- if (priv_ifreq(priv, SIOCETHTOOL, &ifr) != 0) {
- WARN("unable to get statistic names");
- goto free;
- }
- for (j = 0; j != xstats_n; ++j)
- xstats_ctrl->dev_table_idx[j] = dev_stats_n;
- for (i = 0; i != dev_stats_n; ++i) {
- const char *curr_string = (const char *)
- &strings->data[i * ETH_GSTRING_LEN];
-
- for (j = 0; j != xstats_n; ++j) {
- if (!strcmp(mlx5_counters_init[j].ctr_name,
- curr_string)) {
- xstats_ctrl->dev_table_idx[j] = i;
- break;
- }
- }
- }
- for (j = 0; j != xstats_n; ++j) {
- if (priv_is_ib_cntr(mlx5_counters_init[i].ctr_name))
- continue;
- if (xstats_ctrl->dev_table_idx[j] >= dev_stats_n) {
- WARN("counter \"%s\" is not recognized",
- mlx5_counters_init[j].dpdk_name);
- goto free;
- }
- }
- /* Copy to base at first time. */
- assert(xstats_n <= MLX5_MAX_XSTATS);
- priv_read_dev_counters(priv, xstats_ctrl->base);
-free:
- rte_free(strings);
-}