Am Fr, den 15.10.2004 schrieb Vladimir Dergachev um 5:27: > On Fri, 15 Oct 2004, Felix [ISO-8859-1] Kühling wrote: > > > Am Fr, den 15.10.2004 schrieb Jon Smirl um 3:58: > >> On Fri, 15 Oct 2004 03:55:37 +0200, Felix Kühling <[EMAIL PROTECTED]> wrote: > >>> I'm trying to get Shadow status working in the savage driver. I'd like > >>> to put the status page into locked shared memory and tell the Savage > >>> chips about its physical address. I used a drmAddMap call copied from > >>> the MGA driver that looked like it did what I wanted. But I had to find > >>> out that the handle returned by drmAddMap is a kernel virtual address, > >>> not a physical address. Later I saw that the status page seems to be > >>> unused in the MGA driver. The code to get the physical address from the > >>> kernel virtual address is #if-ed out, probably for portability reasons. > >> > >> Does the code in drm_pci.c apply? It's only used by the via driver. > >> I'm not sure what it does. > > > > I guess if I was only going to use that memory in kernel drm_pci_alloc > > would be fine. But I want to map the status page at least in the > > Xserver, maybe also in clients. > > Take a look at km or v4l drivers - maybe there is something you can use. > > With 2.4 I used rvmalloc - I don't recall whether there is a standard > mechanism for this in 2.6.
The point is that I'm not just looking for a way to get a physical address in Linux. In that case I'd just use virt_to_bus on the map handle. Since I only need a single page I also don't need to worry about allocating consistent memory. However, I want to use the mechanisms available in the DRM abstraction layer so that the savage driver stays (at least theoretically) portable to BSD and so that I can use drmMap/drmMapBufs to map the status page in the Xserver and/or in DRI clients. > > best > > Vladimir Dergachev Thanks, Felix -- | Felix Kühling <[EMAIL PROTECTED]> http://fxk.de.vu | | PGP Fingerprint: 6A3C 9566 5B30 DDED 73C3 B152 151C 5CC1 D888 E595 | ------------------------------------------------------- This SF.net email is sponsored by: IT Product Guide on ITManagersJournal Use IT products in your business? Tell us what you think of them. Give us Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more http://productguide.itmanagersjournal.com/guidepromo.tmpl -- _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
