target/linux/layerscape/patches-5.4/701-net-0207-dpaa2-eth-Add-reset-controls-for-debugfs-stats.patch

   1 From aa80ddbb30e9ffd75e2dcaa58abf6383a5520942 Mon Sep 17 00:00:00 2001
   2 From: Ioana Radulescu <ruxandra.radulescu@nxp.com>
   3 Date: Wed, 13 Feb 2019 12:23:41 +0200
   4 Subject: [PATCH] dpaa2-eth: Add reset controls for debugfs stats
   5
   6 Allow the user to reset statistics counters through debugfs entries.
   7
   8 Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
   9 ---
  10  .../ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c   | 64 ++++++++++++++++++++++
  11  1 file changed, 64 insertions(+)
  12
  13 --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c
  14 +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c
  15 @@ -167,6 +167,62 @@ static const struct file_operations dpaa
  16         .release = single_release,
  17  };
  18
  19 +static ssize_t dpaa2_dbg_reset_write(struct file *file, const char __user *buf,
  20 +                                    size_t count, loff_t *offset)
  21 +{
  22 +       struct dpaa2_eth_priv *priv = file->private_data;
  23 +       struct rtnl_link_stats64 *percpu_stats;
  24 +       struct dpaa2_eth_drv_stats *percpu_extras;
  25 +       struct dpaa2_eth_fq *fq;
  26 +       struct dpaa2_eth_channel *ch;
  27 +       int i;
  28 +
  29 +       for_each_online_cpu(i) {
  30 +               percpu_stats = per_cpu_ptr(priv->percpu_stats, i);
  31 +               memset(percpu_stats, 0, sizeof(*percpu_stats));
  32 +
  33 +               percpu_extras = per_cpu_ptr(priv->percpu_extras, i);
  34 +               memset(percpu_extras, 0, sizeof(*percpu_extras));
  35 +       }
  36 +
  37 +       for (i = 0; i < priv->num_fqs; i++) {
  38 +               fq = &priv->fq[i];
  39 +               memset(&fq->stats, 0, sizeof(fq->stats));
  40 +       }
  41 +
  42 +       for (i = 0; i < priv->num_channels; i++) {
  43 +               ch = priv->channel[i];
  44 +               memset(&ch->stats, 0, sizeof(ch->stats));
  45 +       }
  46 +
  47 +       return count;
  48 +}
  49 +
  50 +static const struct file_operations dpaa2_dbg_reset_ops = {
  51 +       .open = simple_open,
  52 +       .write = dpaa2_dbg_reset_write,
  53 +};
  54 +
  55 +static ssize_t dpaa2_dbg_reset_mc_write(struct file *file,
  56 +                                       const char __user *buf,
  57 +                                       size_t count, loff_t *offset)
  58 +{
  59 +       struct dpaa2_eth_priv *priv = file->private_data;
  60 +       int err;
  61 +
  62 +       err = dpni_reset_statistics(priv->mc_io, 0, priv->mc_token);
  63 +       if (err)
  64 +               netdev_err(priv->net_dev,
  65 +                          "dpni_reset_statistics() failed %d\n", err);
  66 +
  67 +       return count;
  68 +}
  69 +
  70 +static const struct file_operations dpaa2_dbg_reset_mc_ops = {
  71 +       .open = simple_open,
  72 +       .write = dpaa2_dbg_reset_mc_write,
  73 +};
  74 +
  75  void dpaa2_dbg_add(struct dpaa2_eth_priv *priv)
  76  {
  77         struct dentry *dir;
  78 @@ -183,6 +239,14 @@ void dpaa2_dbg_add(struct dpaa2_eth_priv
  79
  80         /* per-fq stats file */
  81         debugfs_create_file("ch_stats", 0444, dir, priv, &dpaa2_dbg_ch_ops);
  82 +
  83 +       /* reset stats */
  84 +       debugfs_create_file("reset_stats", 0200, dir, priv,
  85 +                           &dpaa2_dbg_reset_ops);
  86 +
  87 +       /* reset MC stats */
  88 +       debugfs_create_file("reset_mc_stats", 0222, dir, priv,
  89 +                           &dpaa2_dbg_reset_mc_ops);
  90  }
  91
  92  void dpaa2_dbg_remove(struct dpaa2_eth_priv *priv)