I am implementing a network driver for a DMA device on a custom 405GP/GPr based board. The networking device is attached over PCI bus. Kernel is currently 2.4.21. BIOS is PPCBoot 1.2.0.
To map the data buffers from skb the driver uses pci_map_single(). When starting the kernel with SDRAM size configurations other than 32MByte the device is unable to transfer data (currupted data) - descriptor dword read/write-back works (set up with pci_alloc_consistent()). For the kernel start option mem=32MB everything is fine (descriptor + correct data). I am wondering if someone has stumbled over this too - any advice appreciated. Thanks, Oliver ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
