On Tue, 2009-10-27 at 11:02 +0100, Fortini Matteo wrote: > The simple_map_init() works at a higher level, what I'm redefining is a > function called by mtd->read()
not sure I follow. What you want to do is change the access to the flash. You do this by turning on MTD_COMPLEX_MAPPINGS and then setting up the function pointers like is done in simple_map_init() but point to your own functions. Now every access to the NOR flash will be done using your functions and you can do whatever optimization you like. > The block size for e.g. a dd if=/dev/mtd0 of=/dev/null > with the default block size (I believe it's 512Bytes), fetches from > /dev/mtd0 4096 Bytes at a time. > I'd prefer the kernel to be scheduling other tasks meanwhile, instead of > busy-waiting on completion. > > Regards > > Kenneth Johansson ha scritto: > > On Mon, 2009-10-19 at 09:52 +0200, Fortini Matteo wrote: > > > > > >> I didn't find a cleaner way than just #ifdef'ing the map_copy_from call > >> and substitute with my call on relevant cases. I wonder if there is a > >> cleaner way. > >> > > > > Remove the call to simple_map_init() and do it manually in your driver > > with your own functions. > > > > > >> And yes, as soon as I've cleaned up the code a little bit, I will > >> definitely post a patch about it. > >> > >> Moreover: a huge benefit would come from exploiting DMA on these > >> transfers, > >> > > > > probably depends on the block size if it's a gain or not. What is the > > size you normally see. > > > > > > > > _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
