From: Sepherosa Ziehau <sephe@dragonflybsd.org>
Date: Fri, 17 Aug 2012 15:13:33 +0000 (+0800)
Subject: pci: Enable PCIe memory mapped configuration again
X-Git-Tag: v3.2.0~372
X-Git-Url: https://gitweb.dragonflybsd.org/dragonfly.git/commitdiff_plain/aaa576552b475dd91f4433c99d494f3008753e98?ds=sidebyside

pci: Enable PCIe memory mapped configuration again

bd7ad9e91e71693907a00c74ab8dfc457cd655c9 should have fixed the
system hanging seen by y0netan1@
---

diff --git a/sys/bus/pci/x86_64/pci_cfgreg.c b/sys/bus/pci/x86_64/pci_cfgreg.c
index 01d9a2eacf..0d12a73b61 100644
--- a/sys/bus/pci/x86_64/pci_cfgreg.c
+++ b/sys/bus/pci/x86_64/pci_cfgreg.c
@@ -63,7 +63,7 @@ static uint32_t pcie_badslots;
 static int cfgmech;
 static struct spinlock pcicfg_spin;
 
-static int mcfg_enable = 0;
+static int mcfg_enable = 1;
 TUNABLE_INT("hw.pci.mcfg", &mcfg_enable);
 
 static uint32_t	pci_docfgregread(int bus, int slot, int func, int reg, int bytes);
@@ -273,6 +273,9 @@ pcie_cfgregopen(uint64_t base, uint8_t minbus, uint8_t maxbus)
 	if (minbus != 0)
 		return 0;
 
+	if (bootverbose)
+		kprintf("PCIe: Using Memory Mapped configuration\n");
+
 	pcie_base = (vm_offset_t)pmap_mapdev_uncacheable(base,
 	    ((unsigned)maxbus + 1) << 20);
 	pcie_minbus = minbus;