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net/macb: ethtool interface: add register dump feature

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Add macb_get_regs() ethtool function and its helper function:
macb_get_regs_len().
The version field is deduced from the IP revision which gives the
"MACB or GEM" information. An additional version field is reserved.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Reviewed-by: Ben Hutchings <bhutchings@solarflare.com>
Tested-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nicolas Ferre 2012-10-31 06:04:56 +00:00 committed by David S. Miller
parent 55054a16a5
commit d1d1b53d9d
2 changed files with 43 additions and 0 deletions
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40
drivers/net/ethernet/cadence/macb.c
View file

@ -1273,9 +1273,49 @@ static int macb_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
return phy_ethtool_sset(phydev, cmd);
}
static int macb_get_regs_len(struct net_device *netdev)
{
return MACB_GREGS_NBR * sizeof(u32);
}
static void macb_get_regs(struct net_device *dev, struct ethtool_regs *regs,
void *p)
{
struct macb *bp = netdev_priv(dev);
unsigned int tail, head;
u32 *regs_buff = p;
regs->version = (macb_readl(bp, MID) & ((1 << MACB_REV_SIZE) - 1))
| MACB_GREGS_VERSION;
tail = macb_tx_ring_wrap(bp->tx_tail);
head = macb_tx_ring_wrap(bp->tx_head);
regs_buff[0] = macb_readl(bp, NCR);
regs_buff[1] = macb_or_gem_readl(bp, NCFGR);
regs_buff[2] = macb_readl(bp, NSR);
regs_buff[3] = macb_readl(bp, TSR);
regs_buff[4] = macb_readl(bp, RBQP);
regs_buff[5] = macb_readl(bp, TBQP);
regs_buff[6] = macb_readl(bp, RSR);
regs_buff[7] = macb_readl(bp, IMR);
regs_buff[8] = tail;
regs_buff[9] = head;
regs_buff[10] = macb_tx_dma(bp, tail);
regs_buff[11] = macb_tx_dma(bp, head);
if (macb_is_gem(bp)) {
regs_buff[12] = gem_readl(bp, USRIO);
regs_buff[13] = gem_readl(bp, DMACFG);
}
}
const struct ethtool_ops macb_ethtool_ops = {
.get_settings = macb_get_settings,
.set_settings = macb_set_settings,
.get_regs_len = macb_get_regs_len,
.get_regs = macb_get_regs,
.get_link = ethtool_op_get_link,
.get_ts_info = ethtool_op_get_ts_info,
};

3
drivers/net/ethernet/cadence/macb.h
View file

@ -10,6 +10,9 @@
#ifndef _MACB_H
#define _MACB_H
#define MACB_GREGS_NBR 16
#define MACB_GREGS_VERSION 1
/* MACB register offsets */
#define MACB_NCR 0x0000
#define MACB_NCFGR 0x0004