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[SKY2]: ethtool register reserved area blackout
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>
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1 changed files with 53 additions and 9 deletions
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@ -3569,20 +3569,64 @@ static void sky2_get_regs(struct net_device *dev, struct ethtool_regs *regs,
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{
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const struct sky2_port *sky2 = netdev_priv(dev);
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const void __iomem *io = sky2->hw->regs;
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unsigned int b;
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regs->version = 1;
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memset(p, 0, regs->len);
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memcpy_fromio(p, io, B3_RAM_ADDR);
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for (b = 0; b < 128; b++) {
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/* This complicated switch statement is to make sure and
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* only access regions that are unreserved.
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* Some blocks are only valid on dual port cards.
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* and block 3 has some special diagnostic registers that
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* are poison.
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*/
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switch (b) {
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case 3:
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/* skip diagnostic ram region */
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memcpy_fromio(p + 0x10, io + 0x10, 128 - 0x10);
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break;
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/* skip diagnostic ram region */
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memcpy_fromio(p + B3_RI_WTO_R1, io + B3_RI_WTO_R1, 0x2000 - B3_RI_WTO_R1);
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/* copy GMAC registers */
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memcpy_fromio(p + BASE_GMAC_1, io + BASE_GMAC_1, 0x1000);
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if (sky2->hw->ports > 1)
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memcpy_fromio(p + BASE_GMAC_2, io + BASE_GMAC_2, 0x1000);
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/* dual port cards only */
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case 5: /* Tx Arbiter 2 */
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case 9: /* RX2 */
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case 14 ... 15: /* TX2 */
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case 17: case 19: /* Ram Buffer 2 */
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case 22 ... 23: /* Tx Ram Buffer 2 */
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case 25: /* Rx MAC Fifo 1 */
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case 27: /* Tx MAC Fifo 2 */
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case 31: /* GPHY 2 */
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case 40 ... 47: /* Pattern Ram 2 */
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case 52: case 54: /* TCP Segmentation 2 */
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case 112 ... 116: /* GMAC 2 */
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if (sky2->hw->ports == 1)
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goto reserved;
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/* fall through */
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case 0: /* Control */
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case 2: /* Mac address */
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case 4: /* Tx Arbiter 1 */
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case 7: /* PCI express reg */
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case 8: /* RX1 */
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case 12 ... 13: /* TX1 */
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case 16: case 18:/* Rx Ram Buffer 1 */
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case 20 ... 21: /* Tx Ram Buffer 1 */
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case 24: /* Rx MAC Fifo 1 */
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case 26: /* Tx MAC Fifo 1 */
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case 28 ... 29: /* Descriptor and status unit */
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case 30: /* GPHY 1*/
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case 32 ... 39: /* Pattern Ram 1 */
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case 48: case 50: /* TCP Segmentation 1 */
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case 56 ... 60: /* PCI space */
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case 80 ... 84: /* GMAC 1 */
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memcpy_fromio(p, io, 128);
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break;
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default:
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reserved:
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memset(p, 0, 128);
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}
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p += 128;
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io += 128;
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}
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}
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/* In order to do Jumbo packets on these chips, need to turn off the
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