On Wed, Jun 13, 2012 at 09:44:19AM +0800, llittle了了 wrote: > > HI,all > Now, my lab is using radeon_ati card。And, I need ati_card dma function。But, I do not clear that how the ati card know the dma address which alloced by kernel?? By using the PCI API. > > Can any kernel drivers for radeon card give me some advise or explain the answer? > > I have read the radeon driver in kernel (/driver/gpu/drm/randeon/xxx ）and the TTM manager. So, as I know, If I use GFP_KERNEL sign to alloc memory, the radeon_card work right, but any other palce ,it failed. Why and how this happened? > Is there any way to tell the dma address and ring buffer address in kernel to the radeon_card ? > > It`s so confused! Hope for your answer! > > > Thanks so much! > zhiyig Si > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/dri-devel _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
