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ivshmem-net: Add ethtool register dump 

Helps debugging inconsistent states.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
(cherry picked from commit 81674136b6936fb8219dac1dcdb6df8fe424143d)
5.4-rM2-2.2.x-imx-squashed
Jan Kiszka 2017-01-01 15:46:26 +01:00 committed by Dong Aisheng
parent 2219bf0ef9
commit 9daf55a918
1 changed files with 31 additions and 0 deletions
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31
drivers/net/ivshmem-net.c
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@ -748,10 +748,41 @@ static void ivshm_net_get_ethtool_stats(struct net_device *ndev,
memset(&in->stats, 0, sizeof(in->stats));
}
#define IVSHM_NET_REGS_LEN (3 * sizeof(u32) + 6 * sizeof(u16))
static int ivshm_net_get_regs_len(struct net_device *ndev)
{
return IVSHM_NET_REGS_LEN;
}
static void ivshm_net_get_regs(struct net_device *ndev,
struct ethtool_regs *regs, void *p)
{
struct ivshm_net *in = netdev_priv(ndev);
u32 *reg32 = p;
u16 *reg16;
*reg32++ = in->lstate;
*reg32++ = in->rstate;
*reg32++ = in->qlen;
reg16 = (u16 *)reg32;
*reg16++ = in->tx.vr.avail ? in->tx.vr.avail->idx : 0;
*reg16++ = in->tx.vr.used ? in->tx.vr.used->idx : 0;
*reg16++ = in->tx.vr.avail ? vring_avail_event(&in->tx.vr) : 0;
*reg16++ = in->rx.vr.avail ? in->rx.vr.avail->idx : 0;
*reg16++ = in->rx.vr.used ? in->rx.vr.used->idx : 0;
*reg16++ = in->rx.vr.avail ? vring_avail_event(&in->rx.vr) : 0;
}
static const struct ethtool_ops ivshm_net_ethtool_ops = {
.get_sset_count = ivshm_net_get_sset_count,
.get_strings = ivshm_net_get_strings,
.get_ethtool_stats = ivshm_net_get_ethtool_stats,
.get_regs_len = ivshm_net_get_regs_len,
.get_regs = ivshm_net_get_regs,
};
static int ivshm_net_probe(struct pci_dev *pdev,