linux-kernel - [PATCH 1/4] pci: Add PCI_BUS() and PCI_DEVID() interfaces to return bus number and device id

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <1360623637.2950.63.camel@lorien2>
Date:	Mon, 11 Feb 2013 16:00:37 -0700
From:	Shuah Khan <shuah.khan@...com>
To:	bhelgaas@...gle.com, Joerg Roedel <joro@...tes.org>
Cc:	paulmck@...ux.vnet.ibm.com, linasvepstas@...il.com,
	dhowells@...hat.com, davej@...hat.com, tglx@...utronix.de,
	mtk.manpages@...il.com, iommu@...ts.linux-foundation.org,
	LKML <linux-kernel@...r.kernel.org>, linux-pci@...r.kernel.org,
	shemminger@...tta.com, jiang.liu@...wei.com, wangyijing@...wei.com,
	shuahkhan@...il.com
Subject: [PATCH 1/4] pci: Add PCI_BUS() and PCI_DEVID() interfaces to return
 bus number and device id

pci defines PCI_DEVFN(), PCI_SLOT(), and PCI_FUNC() interfaces, however,
it doesn't have interfaces to return PCI bus and PCI device id. Drivers
(AMD IOMMU, and AER) implement module specific definitions for PCI_BUS()
and AMD_IOMMU driver also has a module specific interface to calculate PCI   
device id from bus number and devfn.

Add PCI_BUS and PCI_DEVID interfaces to return PCI bus number and PCI device
id respectively to avoid the need for duplicate definitions in other modules.
AER driver code and AMD IOMMU driver define PCI_BUS. AMD IOMMU driver defines
an interface to calculate device id from bus number, and devfn pair.

Signed-off-by: Shuah Khan <shuah.khan@...com>
---
 include/uapi/linux/pci.h |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/uapi/linux/pci.h b/include/uapi/linux/pci.h
index 3c292bc0..6b2c8b3 100644
--- a/include/uapi/linux/pci.h
+++ b/include/uapi/linux/pci.h
@@ -30,6 +30,10 @@
 #define PCI_DEVFN(slot, func)	((((slot) & 0x1f) << 3) | ((func) & 0x07))
 #define PCI_SLOT(devfn)		(((devfn) >> 3) & 0x1f)
 #define PCI_FUNC(devfn)		((devfn) & 0x07)
+#define PCI_DEVID(bus, devfn)	((((u16)bus) << 8) | devfn)
+
+/* return bus from PCI devid = ((u16)bus_number) << 8) | devfn */
+#define PCI_BUS(x) (((x) >> 8) & 0xff)
 
 /* Ioctls for /proc/bus/pci/X/Y nodes. */
 #define PCIIOC_BASE		('P' << 24 | 'C' << 16 | 'I' << 8)
-- 
1.7.9.5



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/