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Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6 

* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6:
  [PATCH] sky2: fix jumbo packet support
This commit is contained in:
Linus Torvalds 2006-05-24 08:36:03 -07:00
parent 51c4032740 a1433ac4ab
commit b8bba261e0
1 changed files with 16 additions and 3 deletions
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19
drivers/net/sky2.c
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@ -979,6 +979,7 @@ static int sky2_rx_start(struct sky2_port *sky2)
struct sky2_hw *hw = sky2->hw;
unsigned rxq = rxqaddr[sky2->port];
int i;
unsigned thresh;
sky2->rx_put = sky2->rx_next = 0;
sky2_qset(hw, rxq);
@ -1003,9 +1004,21 @@ static int sky2_rx_start(struct sky2_port *sky2)
sky2_rx_add(sky2, re->mapaddr);
}
/* Truncate oversize frames */
sky2_write16(hw, SK_REG(sky2->port, RX_GMF_TR_THR), sky2->rx_bufsize - 8);
sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T), RX_TRUNC_ON);
/*
* The receiver hangs if it receives frames larger than the
* packet buffer. As a workaround, truncate oversize frames, but
* the register is limited to 9 bits, so if you do frames > 2052
* you better get the MTU right!
*/
thresh = (sky2->rx_bufsize - 8) / sizeof(u32);
if (thresh > 0x1ff)
sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T), RX_TRUNC_OFF);
else {
sky2_write16(hw, SK_REG(sky2->port, RX_GMF_TR_THR), thresh);
sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T), RX_TRUNC_ON);
}
/* Tell chip about available buffers */
sky2_write16(hw, Y2_QADDR(rxq, PREF_UNIT_PUT_IDX), sky2->rx_put);