DM8168 EVM EZSDK PCIe support

David Hardwick

Hi,

We have a DM816x/C6A816x/AM389x Evaluation Module that we wish to utilse the PCIe interface.

Reading the documentation that comes with the EZSDK, it appears that the kernel supports PCIe RC by default. On boot we get:

Registered ti81xx_fb device
ti816x_pcie: Invoking PCI BIOS...
ti816x_pcie: Setting up Host Controller...
ti816x_pcie: Register base mapped @0xd0820000
ti816x_pcie: Starting PCI scan...
PCI: bus0: Fast back to back transfers enabled
bio: create slab <bio-0> at 0
vgaarb: loaded

The kernel config shows that Bus Support - PCI Support is enabled.

However, after boot, the command lscpi is no where to be found. What else do we need to do to get PCIe support?

Many thanks,

Dave

over 14 years ago

0 -Perry over 14 years ago

Intellectual 440 points

Hi Dave,

I agree with you. If TI's official document mentions "lspci", it should had been built into Linux kernel. Otherwise it lowers the quality of the documents.

I wish TI will address this in the future SDK release. BTY, you can build the pci utility from open source by yourself. But be prepared to invest time on resolving all the library and makefile issues.

Regards,

-Perry

0 -Perry over 14 years ago in reply to -Perry

Intellectual 440 points

I correct myself. lspci should be Linux file system, not the kernel. -Perry

0 David Hardwick over 14 years ago in reply to -Perry

Intellectual 260 points

Thanks Perry.

0 David Hardwick over 14 years ago in reply to David Hardwick

Intellectual 260 points

Discovered (via TI) that information on attached PCIe bus devices can be found in /sys/bus/pci/devices.

0 HemantPedanekar over 14 years ago in reply to David Hardwick

TI__Expert 5685 points

That is correct, as mentioned @ http://processors.wiki.ti.com/index.php/DM816x_C6A816x_AM389x_PCI_Express_Root_Complex_Driver_User_Guide#Ensuring_PCIe_System_Initialization

"If 'lspci' utility is not available, then /sys/bus/pci/devices/ directory can be examined to get raw information about PCI devices found, such as vendor ID, device ID etc. "

Hemant

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DM8168 EVM EZSDK PCIe support