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[TG3]: Add ASPM workaround.

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This patch adds workaround to fix performance problems caused by slow
PCIE L1->L0 transitions on ICH8 platforms.

Changed all magic numbers to constants as suggested by Jeff Garzik.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Carlson
2007-05-07 00:25:49 -07:00
committed by David S. Miller
parent 15700770ef
commit 8ed5d97e5e
2 changed files with 34 additions and 0 deletions
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24
drivers/net/tg3.c
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@@ -3019,6 +3019,16 @@ static int tg3_setup_phy(struct tg3 *tp, int force_reset)
}
}
if (tp->tg3_flags & TG3_FLAG_ASPM_WORKAROUND) {
u32 val = tr32(PCIE_PWR_MGMT_THRESH);
if (!netif_carrier_ok(tp->dev))
val = (val & ~PCIE_PWR_MGMT_L1_THRESH_MSK) |
tp->pwrmgmt_thresh;
else
val |= PCIE_PWR_MGMT_L1_THRESH_MSK;
tw32(PCIE_PWR_MGMT_THRESH, val);
}
return err;
}
@@ -10004,6 +10014,8 @@ static void __devinit tg3_get_eeprom_hw_cfg(struct tg3 *tp)
tp->tg3_flags &= ~TG3_FLAG_EEPROM_WRITE_PROT;
tp->tg3_flags2 |= TG3_FLG2_IS_NIC;
}
if (tr32(VCPU_CFGSHDW) & VCPU_CFGSHDW_ASPM_DBNC)
tp->tg3_flags |= TG3_FLAG_ASPM_WORKAROUND;
return;
}
@@ -10131,6 +10143,14 @@ static void __devinit tg3_get_eeprom_hw_cfg(struct tg3 *tp)
/* bootcode if bit 18 is set */
if (cfg2 & (1 << 18))
tp->tg3_flags2 |= TG3_FLG2_SERDES_PREEMPHASIS;
if (tp->tg3_flags2 & TG3_FLG2_PCI_EXPRESS) {
u32 cfg3;
tg3_read_mem(tp, NIC_SRAM_DATA_CFG_3, &cfg3);
if (cfg3 & NIC_SRAM_ASPM_DEBOUNCE)
tp->tg3_flags |= TG3_FLAG_ASPM_WORKAROUND;
}
}
}
@@ -10998,6 +11018,10 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
*/
tp->tg3_flags &= ~TG3_FLAG_WOL_ENABLE;
if (tp->tg3_flags & TG3_FLAG_ASPM_WORKAROUND)
tp->pwrmgmt_thresh = tr32(PCIE_PWR_MGMT_THRESH) &
PCIE_PWR_MGMT_L1_THRESH_MSK;
return err;
}