Re: AMD gpu RX 6600 not recognized

[Jonathan Gray]

On Fri, Sep 29, 2023 at 10:09:17PM +0200, Solène Rapenne wrote:
> amdgpu_bar_sizes: RBCAP0 0x3f000 sizes: 256M 512M 1G 2G 4G 8G
> amdgpu_bar_sizes: RBCTRL0 0xd40 8G
> GMC real 0x1ff000000 vis 0x1ff000000, FB off 0x7c00000000 size 0x200000000,
> gart size 0x20000000

Does limiting to a 32-bit size help?

Index: sys/dev/pci/drm/amd/amdgpu/amdgpu_ttm.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/drm/amd/amdgpu/amdgpu_ttm.c,v
retrieving revision 1.14
diff -u -p -r1.14 amdgpu_ttm.c
--- sys/dev/pci/drm/amd/amdgpu/amdgpu_ttm.c     13 Aug 2023 10:36:26 -0000      
1.14
+++ sys/dev/pci/drm/amd/amdgpu/amdgpu_ttm.c     2 Oct 2023 10:48:45 -0000
@@ -1791,6 +1791,13 @@ int amdgpu_ttm_init(struct amdgpu_device
                return r;
        }
 
+#ifdef __OpenBSD__
+       if (amdgpu_vis_vram_limit == 0 && ((adev->flags & AMD_IS_APU) == 0)) {
+               if (amdgpu_vis_vram_limit > 4096)
+                       amdgpu_vis_vram_limit = 4096;
+       }
+#endif
+
        /* Reduce size of CPU-visible VRAM if requested */
        vis_vram_limit = (u64)amdgpu_vis_vram_limit * 1024 * 1024;
        if (amdgpu_vis_vram_limit > 0 &&
@@ -1810,11 +1817,13 @@ int amdgpu_ttm_init(struct amdgpu_device
                adev->mman.aper_base_kaddr = ioremap_wc(adev->gmc.aper_base,
                                adev->gmc.visible_vram_size);
 #else
-       if (bus_space_map(adev->memt, adev->gmc.aper_base,
+       r = bus_space_map(adev->memt, adev->gmc.aper_base,
            adev->gmc.visible_vram_size,
            BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE,
-           &adev->mman.aper_bsh)) {
+           &adev->mman.aper_bsh);
+       if (r) {
                adev->mman.aper_base_kaddr = NULL;
+               printf("bus_space_map ret %d\n", r);
        } else {
                adev->mman.aper_base_kaddr = bus_space_vaddr(adev->memt,
                    adev->mman.aper_bsh);