svn commit: r189400 - head/sys/dev/pci
John Baldwin
jhb at FreeBSD.org
Thu Mar 5 07:28:47 PST 2009
Author: jhb
Date: Thu Mar 5 15:28:46 2009
New Revision: 189400
URL: http://svn.freebsd.org/changeset/base/189400
Log:
Honor the prefetchable flag in memory BARs by setting the RF_PREFETCHABLE
flag when calling bus_alloc_resource() to allocate resources from a parent
PCI bridge. For PCI-PCI bridges this asks the bridge to satisfy the
request using the prefetchable memory range rather than the normal
memory range.
Reviewed by: imp
Reported by: scottl
MFC after: 1 week
Modified:
head/sys/dev/pci/pci.c
Modified: head/sys/dev/pci/pci.c
==============================================================================
--- head/sys/dev/pci/pci.c Thu Mar 5 12:04:42 2009 (r189399)
+++ head/sys/dev/pci/pci.c Thu Mar 5 15:28:46 2009 (r189400)
@@ -2313,9 +2313,11 @@ pci_add_map(device_t pcib, device_t bus,
PCIB_WRITE_CONFIG(pcib, b, s, f, reg, map, 4);
PCIB_WRITE_CONFIG(pcib, b, s, f, PCIR_COMMAND, cmd, 2);
- if (PCI_BAR_MEM(map))
+ if (PCI_BAR_MEM(map)) {
type = SYS_RES_MEMORY;
- else
+ if (map & PCIM_BAR_MEM_PREFETCH)
+ prefetch = 1;
+ } else
type = SYS_RES_IOPORT;
ln2size = pci_mapsize(testval);
ln2range = pci_maprange(testval);
@@ -3488,6 +3490,8 @@ pci_alloc_map(device_t dev, device_t chi
count = 1UL << mapsize;
if (RF_ALIGNMENT(flags) < mapsize)
flags = (flags & ~RF_ALIGNMENT_MASK) | RF_ALIGNMENT_LOG2(mapsize);
+ if (PCI_BAR_MEM(testval) && (testval & PCIM_BAR_MEM_PREFETCH))
+ flags |= RF_PREFETCHABLE;
/*
* Allocate enough resource, and then write back the
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