目标
我正在尝试以编程方式找出特定PCIe设备连接在哪个物理插槽上。前提是我有一张卡的PCI-ID,该卡肯定正在占用一个插槽,解决方案是找出哪个卡。
请注意,我只对PCI Express总线上的工作感兴趣,尽管我认为设备标识/枚举过程与旧的PCI相同。
尝试
SMBIOS包含有关可用主板插槽的信息。可以从linux命令行检查此信息:
$ sudo dmidecode -t slot
# dmidecode 2.11
SMBIOS 2.7 present.
Handle 0x003A, DMI type 9, 17 bytes
System Slot Information
Designation: PCIEX16_1
Type: x16 PCI Express x16
Current Usage: In Use
Length: Short
ID: 1
Characteristics:
3.3 V is provided
Opening is shared
PME signal is supported
Bus Address: 0000:03:02.0
Handle 0x003B, DMI type 9, 17 bytes
System Slot Information
Designation: PCIEX16_2
Type: x8 PCI Express x8
Current Usage: In Use
Length: Short
ID: 2
Characteristics:
3.3 V is provided
Opening is shared
PME signal is supported
Bus Address: 0000:04:02.2
Handle 0x003C, DMI type 9, 17 bytes
System Slot Information
Designation: PCIEX16_3
Type: x16 PCI Express x16
Current Usage: In Use
Length: Short
ID: 3
Characteristics:
3.3 V is provided
Opening is shared
PME signal is supported
Bus Address: 0000:05:03.0
但是,我在PCI bus (lspci
)中找不到任何PCI为0000:03:02.0
、0000:04:02.2
或0000:05:03.0
的设备。我通过人工检查了解到的情况如下:
0000:03:00.0
位于第一个插槽中。PCI桥似乎位于第二个插槽中的0000:00:02.0
0000:04:00.0
。PCI桥似乎位于第三个插槽中的0000:00:02.2
0000:05:00.0
。PCI网桥显示为0000:00:03.0
。
所以这里出现了一种模式。从SMBIOS结构来看,总线编号是提供给插入的卡的总线编号,但设备/功能编号与相应的PCI网桥相同。
这种模式在我的主板上只是一个巧合,还是有其背后的原因?它是一块华硕主板,带有AMI BIOS。我读到过一些BIOSes不能提供关于它们插槽的准确信息,所以我想知道我能实现多大的通用性。
任何指向参考文档的提示或指针也是非常受欢迎的。
发布于 2016-02-05 07:40:50
您可能会发现lspci
命令很有帮助。以下是示例输出:
# lspci -v -t
-[0000:00]-+-00.0 Intel Corporation 5500 I/O Hub to ESI Port
+-01.0-[01]--+-00.0 Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet
| \-00.1 Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet
+-03.0-[02]--+-00.0 Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet
| \-00.1 Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet
+-07.0-[04]----00.0 LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator]
+-09.0-[05]----00.0 LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator]
+-14.0 Intel Corporation 7500/5520/5500/X58 I/O Hub System Management Registers
+-14.1 Intel Corporation 7500/5520/5500/X58 I/O Hub GPIO and Scratch Pad Registers
+-14.2 Intel Corporation 7500/5520/5500/X58 I/O Hub Control Status and RAS Registers
+-1a.0 Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4
+-1a.1 Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5
+-1a.7 Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2
+-1c.0-[03]----00.0 LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator]
+-1d.0 Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1
+-1d.1 Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2
+-1d.7 Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1
+-1e.0-[06]----03.0 Matrox Electronics Systems Ltd. MGA G200eW WPCM450
+-1f.0 Intel Corporation 82801IB (ICH9) LPC Interface Controller
\-1f.2 Intel Corporation 82801IB (ICH9) 2 port SATA Controller [IDE mode]
https://stackoverflow.com/questions/20974691
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