Change Details

Further investigation of issues with 32-bit DMA on PowerNV revealed that its window is hardcoded by OPAL (at least in skiboot version 5.4.9) and cannot be changed by the OS. Thus, now jhb suggestion of limiting the range in PCI DMA tag seems the best way to deal with it. This was done in opal_pci.c. This commit also reverts 2 previous hacks, in AHCI and bge(4).

Further investigation of issues with 32-bit DMA on PowerNV revealed that its window is hardcoded by OPAL (at least in skiboot version 5.4.9) and cannot be changed by the OS. Thus, now jhb suggestion of limiting the range in PCI DMA tag seems the best way to deal with it.

Further investigation of issues with 32-bit DMA on PowerNV revealed that its window is hardcoded by OPAL (at least in skiboot version 5.4.9) and cannot be changed by the OS. Thus, now jhb suggestion of limiting the range in PCI DMA tag seems the best way to deal with it. This was done in opal_pci.c. This commit also reverts 2 previous hacks, in AHCI and bge(4).