[patch 11/16] sky2: ethtool register reserved area blackout

Greg KH
2007-11-15T06:48:19Z

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-stable review patch. If anyone has any objections, please let us know.

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From: Stephen Hemminger <shemminger@linux-foundation.org>

patch 295b54c4902c52cd00d7c837d50a86e39e26caec in mainline.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/net/sky2.c | 62 +++++++++++++++++++++++++++++++++++++++++++++--------
1 file changed, 53 insertions(+), 9 deletions(-)

--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -3570,20 +3570,64 @@ static void sky2_get_regs(struct net_dev
{
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);
-
- /* skip diagnostic ram region */
- memcpy_fromio(p + B3_RI_WTO_R1, io + B3_RI_WTO_R1, 0x2000 - B3_RI_WTO_R1);
+ 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;

- /* 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

--