DM8168的PCIE问题

您好，我使用的是DM8168，使用demo板的PCI2插槽，插上我的PCI2板卡，DM8168的demo板启动后运行lspci命令显示如下：

root@seed_dvs8168:~# lspci
00:00.0 Class 0604: 104c:8888

我试过不同类型的PCIE板卡，读出来的Vendorid都是104c:8888，这个是不对的，查看kernel的启动打印如下

谁能帮忙分析一下这是什么原因，应该如何修改。

Starting kernel …

Uncompressing Linux… done, booting the kernel.
map_mux_get_by_name: Could not find signal i2c2_sda.i2c2_sda
registered ti816x_vpss device
registered ti816x_gpio_vr device
registered TI816x on-chip HDMI device
registered ti816x_sr device
registered ti81xx_vidout device
pm_dbg_init: only OMAP3 supported
ti81xx_pcie: Invoking PCI BIOS…
ti81xx_pcie: Setting up Host Controller…
ti81xx_pcie: Register base mapped @0xd0820000
ti81xx_pcie: Starting PCI scan…
PCI: bus0: Fast back to back transfers disabled
PCI: bus1: Fast back to back transfers disabled
PCI: bus2: Fast back to back transfers disabled
PCI: bus3: Fast back to back transfers enabled
PCI: bus4: Fast back to back transfers enabled
PCI: bus5: Fast back to back transfers enabled
PCI: bus6: Fast back to back transfers enabled
PCI: bus7: Fast back to back transfers enabled
PCI: bus8: Fast back to back transfers enabled
pci 0000:00:00.0: BAR 8: assigned [mem 0x20000000-0x206fffff]
pci 0000:00:00.0: BAR 9: assigned [mem 0x20700000-0x20cfffff pref]
pci 0000:00:00.0: BAR 7: can't assign io (size 0x3000)
pci 0000:01:00.0: BAR 8: assigned [mem 0x20000000-0x205fffff]
pci 0000:01:00.0: BAR 9: assigned [mem 0x20700000-0x20cfffff 64bit pref]
pci 0000:01:00.0: BAR 0: assigned [mem 0x20600000-0x2061ffff]
pci 0000:01:00.0: BAR 0: set to [mem 0x20600000-0x2061ffff] (PCI address [0x20600000-0x2061ffff])
pci 0000:01:00.0: BAR 7: can't assign io (size 0x3000)
pci 0000:02:01.0: BAR 8: assigned [mem 0x20000000-0x201fffff]
pci 0000:02:01.0: BAR 9: assigned [mem 0x20700000-0x208fffff 64bit pref]
pci 0000:02:05.0: BAR 8: assigned [mem 0x20200000-0x203fffff]
pci 0000:02:05.0: BAR 9: assigned [mem 0x20900000-0x20afffff 64bit pref]
pci 0000:02:09.0: BAR 8: assigned [mem 0x20400000-0x205fffff]
pci 0000:02:09.0: BAR 9: assigned [mem 0x20b00000-0x20cfffff 64bit pref]
pci 0000:02:01.0: BAR 7: can't assign io (size 0x1000)
pci 0000:02:05.0: BAR 7: can't assign io (size 0x1000)
pci 0000:02:09.0: BAR 7: can't assign io (size 0x1000)
pci 0000:02:01.0: PCI bridge to [bus 03-03]
pci 0000:02:01.0: bridge window [io disabled]
pci 0000:02:01.0: bridge window [mem 0x20000000-0x201fffff]
pci 0000:02:01.0: bridge window [mem 0x20700000-0x208fffff 64bit pref]
pci 0000:02:04.0: PCI bridge to [bus 04-04]
pci 0000:02:04.0: bridge window [io disabled]
pci 0000:02:04.0: bridge window [mem disabled]
pci 0000:02:04.0: bridge window [mem pref disabled]
pci 0000:02:05.0: PCI bridge to [bus 05-05]
pci 0000:02:05.0: bridge window [io disabled]
pci 0000:02:05.0: bridge window [mem 0x20200000-0x203fffff]
pci 0000:02:05.0: bridge window [mem 0x20900000-0x20afffff 64bit pref]
pci 0000:02:06.0: PCI bridge to [bus 06-06]
pci 0000:02:06.0: bridge window [io disabled]
pci 0000:02:06.0: bridge window [mem disabled]
pci 0000:02:06.0: bridge window [mem pref disabled]
pci 0000:02:08.0: PCI bridge to [bus 07-07]
pci 0000:02:08.0: bridge window [io disabled]
pci 0000:02:08.0: bridge window [mem disabled]
pci 0000:02:08.0: bridge window [mem pref disabled]
pci 0000:02:09.0: PCI bridge to [bus 08-08]
pci 0000:02:09.0: bridge window [io disabled]
pci 0000:02:09.0: bridge window [mem 0x20400000-0x205fffff]
pci 0000:02:09.0: bridge window [mem 0x20b00000-0x20cfffff 64bit pref]
pci 0000:01:00.0: PCI bridge to [bus 02-08]
pci 0000:01:00.0: bridge window [io disabled]
pci 0000:01:00.0: bridge window [mem 0x20000000-0x205fffff]
pci 0000:01:00.0: bridge window [mem 0x20700000-0x20cfffff 64bit pref]
pci 0000:00:00.0: PCI bridge to [bus 01-08]
pci 0000:00:00.0: bridge window [io disabled]
pci 0000:00:00.0: bridge window [mem 0x20000000-0x206fffff]
pci 0000:00:00.0: bridge window [mem 0x20700000-0x20cfffff pref]
PCI: enabling device 0000:00:00.0 (0140 -> 0143)
PCI: enabling device 0000:01:00.0 (0140 -> 0143)
PCI: enabling device 0000:02:01.0 (0140 -> 0143)
PCI: enabling device 0000:02:04.0 (0140 -> 0143)
PCI: enabling device 0000:02:05.0 (0140 -> 0143)
PCI: enabling device 0000:02:06.0 (0140 -> 0143)
PCI: enabling device 0000:02:08.0 (0140 -> 0143)
PCI: enabling device 0000:02:09.0 (0140 -> 0143)
pci 0000:00:00.0: BAR 7: can't assign io (size 0x3000)
pci 0000:01:00.0: BAR 7: can't assign io (size 0x3000)
pci 0000:02:01.0: BAR 7: can't assign io (size 0x1000)
pci 0000:02:05.0: BAR 7: can't assign io (size 0x1000)
pci 0000:02:09.0: BAR 7: can't assign io (size 0x1000)
bio: create slab <bio-0> at 0
regulator: VFB: 800 <–> 1025 mV at 920 mVvgaarb: loaded

lucky2：

您好

我想请问下：8168 PCIe配置是在应用代码中配置，还是驱动中？

比如我配置8168为EP设备，则需要配置寄存器PCIE_CFG的PCIE_DEVTYPE 字段，我在ep_drv驱动中没有看到Z这方面的配置

或者配置成RC设备，应该在哪里配置呢？

我在网上下载的demo里，没有见到这方面的配置，在驱动代码中也没有看到，不知。类似下面的那些配置，没有看到相关代码，那应该是怎样操作的呢

谢谢

xavier：

回复 lucky2:

顶下楼主，现在这个有答案了吗？

知道的也回复下

rain li：

回复 xavier:

你好，想问一下。我用sd卡启动了uboot，linux也跑起来了。现在想要查看一下与板子通过pcie 连接的fpga的设备号，不过输入指令lspci，显示command not found. 我该如何解决这个问题？

xavier：

回复 rain li:

自己网上下载，编译就可以了

rain li：

回复 xavier:

是不是在x86结构编译的结果，不能用到arm的架构上。有没有什么交叉编译的资料等？或者是下载的网址等可以推荐？太感谢了。

xavier：

回复 rain li:

当然需要交叉编译

sichang fu：

回复 rain li:

请问，你的问题解决了吗？我也遇到了同样的问题，能说一下怎么解决的吗？

rain li：

回复 lucky2:

TI8168板子的PCIE搜索设备号的问题 ？

1，linux内核启动之后，输入lspci命令，没有任何的打印信息，包括其TI816X其本身的 host的信息也没有。按照pcie user guide 将 PCIe
     debugging enabled，之后就有No link/device的信息出现。
2，系统启动过程中，关于PCIE的打印信息只有如下内容：

    我们的打印信息中：ti81xx_pcie: Register base mapped @0xcb820000，而看网上别人的打印信息是，Register base mapped @0xd0820000.是否是     这个地址映射出了问题。
3，在内核中加入两句话，
       pci_bus_write_config_dword(bus,devfn,PCI_VENDOR_ID,0x66);//added 
       pci_bus_read_config_dword(bus,devfn,PCI_VENDOR_ID,&l);
       发现人为写入的0X66，在下面的读语句中l=-1.这又是什么原因造成的？

weifeng liang：

回复 rain li:

请问你这个问题有解决吗？