linux-kernel - [PATCH 13/15 v5] PCI: reserve bus range for the SR-IOV device

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Message-ID: <20081021115332.GN3185@yzhao12-linux.sh.intel.com>
Date:	Tue, 21 Oct 2008 19:53:32 +0800
From:	Yu Zhao <yu.zhao@...el.com>
To:	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Cc:	"jbarnes@...tuousgeek.org" <jbarnes@...tuousgeek.org>,
	"randy.dunlap@...cle.com" <randy.dunlap@...cle.com>,
	"grundler@...isc-linux.org" <grundler@...isc-linux.org>,
	"achiang@...com" <achiang@...com>,
	"matthew@....cx" <matthew@....cx>,
	"rdreier@...co.com" <rdreier@...co.com>,
	"greg@...ah.com" <greg@...ah.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"virtualization@...ts.linux-foundation.org" 
	<virtualization@...ts.linux-foundation.org>
Subject: [PATCH 13/15 v5] PCI: reserve bus range for the SR-IOV device

Reserve bus range for SR-IOV at device scanning stage.

Cc: Jesse Barnes <jbarnes@...tuousgeek.org>
Cc: Randy Dunlap <randy.dunlap@...cle.com>
Cc: Grant Grundler <grundler@...isc-linux.org>
Cc: Alex Chiang <achiang@...com>
Cc: Matthew Wilcox <matthew@....cx>
Cc: Roland Dreier <rdreier@...co.com>
Cc: Greg KH <greg@...ah.com>
Signed-off-by: Yu Zhao <yu.zhao@...el.com>

---
 drivers/pci/pci.h   |    5 +++++
 drivers/pci/probe.c |    3 +++
 2 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 7735d92..5206ae7 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -204,6 +204,7 @@ void pci_iov_remove_sysfs(struct pci_dev *dev);
 extern int pci_iov_resource_align(struct pci_dev *dev, int resno);
 extern int pci_iov_resource_bar(struct pci_dev *dev, int resno,
 				enum pci_bar_type *type);
+extern int pci_iov_bus_range(struct pci_bus *bus);
 #else
 static inline int pci_iov_init(struct pci_dev *dev)
 {
@@ -227,6 +228,10 @@ static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno,
 {
 	return 0;
 }
+extern inline int pci_iov_bus_range(struct pci_bus *bus)
+{
+	return 0;
+}
 #endif /* CONFIG_PCI_IOV */
 
 #endif /* DRIVERS_PCI_H */
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 18ce9c0..50a1380 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1068,6 +1068,9 @@ unsigned int __devinit pci_scan_child_bus(struct pci_bus *bus)
 	for (devfn = 0; devfn < 0x100; devfn += 8)
 		pci_scan_slot(bus, devfn);
 
+	/* Reserve buses for SR-IOV capability. */
+	max += pci_iov_bus_range(bus);
+
 	/*
 	 * After performing arch-dependent fixup of the bus, look behind
 	 * all PCI-to-PCI bridges on this bus.
-- 
1.5.6.4

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