target/linux/layerscape/patches-5.4/809-jailhouse-0008-ivshmem-net-Add-ethtool-register-dump.patch

   1 From 65e624b3708cb35942297f699d886aa4c8a7e613 Mon Sep 17 00:00:00 2001
   2 From: Jan Kiszka <jan.kiszka@siemens.com>
   3 Date: Sun, 1 Jan 2017 15:46:26 +0100
   4 Subject: [PATCH] ivshmem-net: Add ethtool register dump
   5
   6 Helps debugging inconsistent states.
   7
   8 Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
   9 (cherry picked from commit 81674136b6936fb8219dac1dcdb6df8fe424143d)
  10 ---
  11  drivers/net/ivshmem-net.c | 31 +++++++++++++++++++++++++++++++
  12  1 file changed, 31 insertions(+)
  13
  14 --- a/drivers/net/ivshmem-net.c
  15 +++ b/drivers/net/ivshmem-net.c
  16 @@ -748,10 +748,41 @@ static void ivshm_net_get_ethtool_stats(
  17         memset(&in->stats, 0, sizeof(in->stats));
  18  }
  19
  20 +#define IVSHM_NET_REGS_LEN     (3 * sizeof(u32) + 6 * sizeof(u16))
  21 +
  22 +static int ivshm_net_get_regs_len(struct net_device *ndev)
  23 +{
  24 +       return IVSHM_NET_REGS_LEN;
  25 +}
  26 +
  27 +static void ivshm_net_get_regs(struct net_device *ndev,
  28 +                              struct ethtool_regs *regs, void *p)
  29 +{
  30 +       struct ivshm_net *in = netdev_priv(ndev);
  31 +       u32 *reg32 = p;
  32 +       u16 *reg16;
  33 +
  34 +       *reg32++ = in->lstate;
  35 +       *reg32++ = in->rstate;
  36 +       *reg32++ = in->qlen;
  37 +
  38 +       reg16 = (u16 *)reg32;
  39 +
  40 +       *reg16++ = in->tx.vr.avail ? in->tx.vr.avail->idx : 0;
  41 +       *reg16++ = in->tx.vr.used ? in->tx.vr.used->idx : 0;
  42 +       *reg16++ = in->tx.vr.avail ? vring_avail_event(&in->tx.vr) : 0;
  43 +
  44 +       *reg16++ = in->rx.vr.avail ? in->rx.vr.avail->idx : 0;
  45 +       *reg16++ = in->rx.vr.used ? in->rx.vr.used->idx : 0;
  46 +       *reg16++ = in->rx.vr.avail ? vring_avail_event(&in->rx.vr) : 0;
  47 +}
  48 +
  49  static const struct ethtool_ops ivshm_net_ethtool_ops = {
  50         .get_sset_count         = ivshm_net_get_sset_count,
  51         .get_strings            = ivshm_net_get_strings,
  52         .get_ethtool_stats      = ivshm_net_get_ethtool_stats,
  53 +       .get_regs_len           = ivshm_net_get_regs_len,
  54 +       .get_regs               = ivshm_net_get_regs,
  55  };
  56
  57  static int ivshm_net_probe(struct pci_dev *pdev,