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Disable CLKREQ for ASPM since re(4) doesn't implement link level power saving.

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Reviewed by:  yongari
This commit is contained in:
kevlo 2016-10-27 02:20:13 +00:00
parent 271abc089d
commit 86cee3d1f6
1 changed files with 5 additions and 3 deletions
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8
sys/dev/re/if_re.c
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@ -1358,15 +1358,17 @@ re_attach(device_t dev)
CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF); CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF);
} }
/* Disable ASPM L0S/L1. */ /* Disable ASPM L0S/L1 and CLKREQ. */
if (sc->rl_expcap != 0) { if (sc->rl_expcap != 0) {
cap = pci_read_config(dev, sc->rl_expcap + cap = pci_read_config(dev, sc->rl_expcap +
PCIER_LINK_CAP, 2); PCIER_LINK_CAP, 2);
if ((cap & PCIEM_LINK_CAP_ASPM) != 0) { if ((cap & PCIEM_LINK_CAP_ASPM) != 0) {
ctl = pci_read_config(dev, sc->rl_expcap + ctl = pci_read_config(dev, sc->rl_expcap +
PCIER_LINK_CTL, 2); PCIER_LINK_CTL, 2);
if ((ctl & PCIEM_LINK_CTL_ASPMC) != 0) { if ((ctl & (PCIEM_LINK_CTL_ECPM |
ctl &= ~PCIEM_LINK_CTL_ASPMC; PCIEM_LINK_CTL_ASPMC))!= 0) {
ctl &= ~(PCIEM_LINK_CTL_ECPM |
PCIEM_LINK_CTL_ASPMC);
pci_write_config(dev, sc->rl_expcap + pci_write_config(dev, sc->rl_expcap +
PCIER_LINK_CTL, ctl, 2); PCIER_LINK_CTL, ctl, 2);
device_printf(dev, "ASPM disabled\n"); device_printf(dev, "ASPM disabled\n");