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[SKY2]: ethtool register reserved area blackout

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Make sure and not dump reserved areas of device space.
Touching some of these causes machine check exceptions on boards
like D-Link DGE-550SX.

Coding note, used a complex switch statement rather than bitmap
because it is easier to relate the block values to the documentation
rather than looking at a encoded bitmask.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2007-10-11 19:47:22 -07:00 committed by David S. Miller
parent e86908614f
commit 295b54c490
1 changed files with 53 additions and 9 deletions
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62
drivers/net/sky2.c
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@ -3569,20 +3569,64 @@ static void sky2_get_regs(struct net_device *dev, struct ethtool_regs *regs,
{
const struct sky2_port *sky2 = netdev_priv(dev);
const void __iomem *io = sky2->hw->regs;
unsigned int b;
regs->version = 1;
memset(p, 0, regs->len);
memcpy_fromio(p, io, B3_RAM_ADDR);
for (b = 0; b < 128; b++) {
/* This complicated switch statement is to make sure and
* only access regions that are unreserved.
* Some blocks are only valid on dual port cards.
* and block 3 has some special diagnostic registers that
* are poison.
*/
switch (b) {
case 3:
/* skip diagnostic ram region */
memcpy_fromio(p + 0x10, io + 0x10, 128 - 0x10);
break;
/* skip diagnostic ram region */
memcpy_fromio(p + B3_RI_WTO_R1, io + B3_RI_WTO_R1, 0x2000 - B3_RI_WTO_R1);
/* copy GMAC registers */
memcpy_fromio(p + BASE_GMAC_1, io + BASE_GMAC_1, 0x1000);
if (sky2->hw->ports > 1)
memcpy_fromio(p + BASE_GMAC_2, io + BASE_GMAC_2, 0x1000);
/* dual port cards only */
case 5: /* Tx Arbiter 2 */
case 9: /* RX2 */
case 14 ... 15: /* TX2 */
case 17: case 19: /* Ram Buffer 2 */
case 22 ... 23: /* Tx Ram Buffer 2 */
case 25: /* Rx MAC Fifo 1 */
case 27: /* Tx MAC Fifo 2 */
case 31: /* GPHY 2 */
case 40 ... 47: /* Pattern Ram 2 */
case 52: case 54: /* TCP Segmentation 2 */
case 112 ... 116: /* GMAC 2 */
if (sky2->hw->ports == 1)
goto reserved;
/* fall through */
case 0: /* Control */
case 2: /* Mac address */
case 4: /* Tx Arbiter 1 */
case 7: /* PCI express reg */
case 8: /* RX1 */
case 12 ... 13: /* TX1 */
case 16: case 18:/* Rx Ram Buffer 1 */
case 20 ... 21: /* Tx Ram Buffer 1 */
case 24: /* Rx MAC Fifo 1 */
case 26: /* Tx MAC Fifo 1 */
case 28 ... 29: /* Descriptor and status unit */
case 30: /* GPHY 1*/
case 32 ... 39: /* Pattern Ram 1 */
case 48: case 50: /* TCP Segmentation 1 */
case 56 ... 60: /* PCI space */
case 80 ... 84: /* GMAC 1 */
memcpy_fromio(p, io, 128);
break;
default:
reserved:
memset(p, 0, 128);
}
p += 128;
io += 128;
}
}
/* In order to do Jumbo packets on these chips, need to turn off the