Wind River Support Network


LIN5-18126 : lsi_pcie.c file requires a power of 2 size restriction for PCIe (Fixed available in LSI Github)

Created: Feb 18, 2014    Updated: Dec 19, 2017
Resolved Date: Mar 27, 2014
Found In Version: 5.0.1
Fix Version:
Severity: Standard
Applicable for: Wind River Linux 5
Component/s: BSP


When Axxia driver sets up DMA memory space on CPU, LSI RTE only sets memory space in power 2, thus memory space would be either, e.g. 128M, 256M, 512M, 1024M, etc. In addition, RTE requires extra space for RTE operation. Because of power of 2 and RTE memory space combination (power of 2 + RTE mem), if there is actual memory space 512, then you can only use 256M for the actual DMA memory space (256 + RTE mem). Cisco and LSI made some fix to overcome this power of 2 issue, and allow any size of memory space. 

LSI has released a fix to this in their git tree.  Please see

This needs to be fixed for the LSI_ACP34xx and the LSI_AXM55xx BSPs.


None.  Fix exists in LSI github tree.

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