Axel Dörfler wrote:
Rob Judd <haiqu@xxxxxxxxxx> wrote:Axel Dörfler wrote:The current driver appropriates a small chunk of ISA memory for DMA. Here's a comment from the cm.c file:Rob Judd <haiqu@xxxxxxxxxx> wrote:I thought this was a PCI driver? Are you sure there are any actual limits imposed by that chip?Oops, looks like we need some kernel support for ISA memory here./* We use the SV chip in ISA DMA addressing mode, which is 24 bits */ /* so we need to find suitable, locked, contiguous memory in that */ /* physical address range. */Patches against the kernel to allow for that are welcome, too :-)We need something like this (ie. a page allocation strategy) that allows for more control for the DMA buffer stuff, anyway.
I'll give that some consideration and get back to you. Long time since I looked at the kernel code...
Rob