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PCIe HotPlug: remove tests for DL active link capability

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As of r313097, the HotPlug code requires the link to support
reporting of the data-link status.  Remove tests for this capability
from code that can now assume its presence.

Suggested by:	jhb
Reviewed by:	jhb
MFC after:	3 days
Sponsored by:	Dell EMC
Differential Revision:	https://reviews.freebsd.org/D9431
This commit is contained in:
Eric van Gyzen 2017-02-04 00:34:00 +00:00
parent c613d0c2ba
commit 3729014801
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=313180
2 changed files with 19 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
sys/dev/pci/pci_pci.c
View File

@ -918,6 +918,7 @@ static void
pcib_probe_hotplug(struct pcib_softc *sc)
{
device_t dev;
uint32_t link_cap;
uint16_t link_sta, slot_sta;
if (!pci_enable_pcie_hp)
@ -930,12 +931,12 @@ pcib_probe_hotplug(struct pcib_softc *sc)
if (!(pcie_read_config(dev, PCIER_FLAGS, 2) & PCIEM_FLAGS_SLOT))
return;
sc->pcie_link_cap = pcie_read_config(dev, PCIER_LINK_CAP, 4);
sc->pcie_slot_cap = pcie_read_config(dev, PCIER_SLOT_CAP, 4);
if ((sc->pcie_slot_cap & PCIEM_SLOT_CAP_HPC) == 0)
return;
if ((sc->pcie_link_cap & PCIEM_LINK_CAP_DL_ACTIVE) == 0)
link_cap = pcie_read_config(dev, PCIER_LINK_CAP, 4);
if ((link_cap & PCIEM_LINK_CAP_DL_ACTIVE) == 0)
return;
/*
@ -947,8 +948,7 @@ pcib_probe_hotplug(struct pcib_softc *sc)
* If there is an open MRL but the Data Link Layer is active,
* the MRL is not real.
*/
if ((sc->pcie_slot_cap & PCIEM_SLOT_CAP_MRLSP) != 0 &&
(sc->pcie_link_cap & PCIEM_LINK_CAP_DL_ACTIVE) != 0) {
if ((sc->pcie_slot_cap & PCIEM_SLOT_CAP_MRLSP) != 0) {
link_sta = pcie_read_config(dev, PCIER_LINK_STA, 2);
slot_sta = pcie_read_config(dev, PCIER_SLOT_STA, 2);
if ((slot_sta & PCIEM_SLOT_STA_MRLSS) != 0 &&
@ -1061,10 +1061,8 @@ pcib_hotplug_present(struct pcib_softc *sc)
return (0);
/* Require the Data Link Layer to be active. */
if (sc->pcie_link_cap & PCIEM_LINK_CAP_DL_ACTIVE) {
if (!(sc->pcie_link_sta & PCIEM_LINK_STA_DL_ACTIVE))
return (0);
}
if (!(sc->pcie_link_sta & PCIEM_LINK_STA_DL_ACTIVE))
return (0);
return (-1);
}
@ -1121,20 +1119,18 @@ pcib_pcie_hotplug_update(struct pcib_softc *sc, uint16_t val, uint16_t mask,
* changed on this interrupt. Stop any scheduled timer if
* the Data Link Layer is active.
*/
if (sc->pcie_link_cap & PCIEM_LINK_CAP_DL_ACTIVE) {
if (card_inserted &&
!(sc->pcie_link_sta & PCIEM_LINK_STA_DL_ACTIVE) &&
sc->pcie_slot_sta &
(PCIEM_SLOT_STA_MRLSC | PCIEM_SLOT_STA_PDC)) {
if (cold)
device_printf(sc->dev,
"Data Link Layer inactive\n");
else
callout_reset(&sc->pcie_dll_timer, hz,
pcib_pcie_dll_timeout, sc);
} else if (sc->pcie_link_sta & PCIEM_LINK_STA_DL_ACTIVE)
callout_stop(&sc->pcie_dll_timer);
}
if (card_inserted &&
!(sc->pcie_link_sta & PCIEM_LINK_STA_DL_ACTIVE) &&
sc->pcie_slot_sta &
(PCIEM_SLOT_STA_MRLSC | PCIEM_SLOT_STA_PDC)) {
if (cold)
device_printf(sc->dev,
"Data Link Layer inactive\n");
else
callout_reset(&sc->pcie_dll_timer, hz,
pcib_pcie_dll_timeout, sc);
} else if (sc->pcie_link_sta & PCIEM_LINK_STA_DL_ACTIVE)
callout_stop(&sc->pcie_dll_timer);
pcib_pcie_hotplug_command(sc, val, mask);
@ -1384,7 +1380,7 @@ pcib_setup_hotplug(struct pcib_softc *sc)
mask = PCIEM_SLOT_CTL_DLLSCE | PCIEM_SLOT_CTL_HPIE |
PCIEM_SLOT_CTL_CCIE | PCIEM_SLOT_CTL_PDCE | PCIEM_SLOT_CTL_MRLSCE |
PCIEM_SLOT_CTL_PFDE | PCIEM_SLOT_CTL_ABPE;
val = PCIEM_SLOT_CTL_PDCE | PCIEM_SLOT_CTL_HPIE;
val = PCIEM_SLOT_CTL_DLLSCE | PCIEM_SLOT_CTL_HPIE | PCIEM_SLOT_CTL_PDCE;
if (sc->pcie_slot_cap & PCIEM_SLOT_CAP_APB)
val |= PCIEM_SLOT_CTL_ABPE;
if (sc->pcie_slot_cap & PCIEM_SLOT_CAP_PCP)
@ -1393,8 +1389,6 @@ pcib_setup_hotplug(struct pcib_softc *sc)
val |= PCIEM_SLOT_CTL_MRLSCE;
if (!(sc->pcie_slot_cap & PCIEM_SLOT_CAP_NCCS))
val |= PCIEM_SLOT_CTL_CCIE;
if (sc->pcie_link_cap & PCIEM_LINK_CAP_DL_ACTIVE)
val |= PCIEM_SLOT_CTL_DLLSCE;
/* Turn the attention indicator off. */
if (sc->pcie_slot_cap & PCIEM_SLOT_CAP_AIP) {

1
sys/dev/pci/pcib_private.h
View File

@ -132,7 +132,6 @@ struct pcib_softc
uint16_t bridgectl; /* bridge control register */
uint16_t pcie_link_sta;
uint16_t pcie_slot_sta;
uint32_t pcie_link_cap;
uint32_t pcie_slot_cap;
struct resource *pcie_irq;
void *pcie_ihand;