<html> <head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> <div class="moz-cite-prefix">Am 15.11.2013 09:27, schrieb Michel Dänzer: </div> <blockquote cite="mid:1384504050.20465.9.camel@thor.local" type="cite"> <pre wrap="">On Fre, 2013-11-15 at 08:49 +0100, Jochen Rollwagen wrote: </pre> <blockquote type="cite"> <pre wrap="">I think there are two issues here: the first is the missing alignment workaround, since i'll be upgrading to 3.4.69 anyway i'll insert some diagnostic messages in radeon_device.c and see what happens. </pre> </blockquote> <pre wrap=""> Yes, please do that before speculating more about the problem. </pre> <blockquote type="cite"> <pre wrap="">But i'm pretty certain now that this isn't the cause for the lockups. They are probably (quite certainly) caused by the dynamic binding/unbinding of AGP memory which the Uninorth chipset used in 32-bit powermacs obviously doesn't support. </pre> </blockquote> <pre wrap=""> "doesn't support" is too strong; it's working fine on this PowerBook5,8. But the older the revision of UniNorth, the more quirks. </pre> <blockquote type="cite"> <pre wrap="">All it supports seems to be statically allocating a 256 MB contigouous non-cacheable AGP aperture and using that (since the chipset doesn't do any address mapping via the GART as indicated in the OpenBSD code). </pre> </blockquote> <pre wrap=""> It does address mapping for the GPU, that's the whole point of the GART. What UniNorth doesn't do in contrast to most AGP bridges is provide a linear aperture to the CPU as well. But that shouldn't be an issue per se. </pre> <blockquote type="cite"> <pre wrap="">So to get AGP mode working again on those machines one would have to disable the dynamic memory stuff. Question: Would that require changes in the driver only or also in the DRM ? </pre> </blockquote> <pre wrap=""> It's not really possible with radeon KMS. </pre> </blockquote> Here are the dmesg output for PCI and AGP mode with kernel 3.4.69: PCI mode: [ 0.852172] Linux agpgart interface v0.103 [ 0.852198] agpgart-uninorth 0000:00:0b.0: Apple UniNorth 2 chipset [ 0.853260] agpgart-uninorth 0000:00:0b.0: configuring for size idx: 64 [ 0.853339] agpgart-uninorth 0000:00:0b.0: AGP aperture is 256M @ 0x0 ... [ 2.542722] [drm] Initialized drm 1.1.0 20060810 ... [ 2.747123] [drm] radeon kernel modesetting enabled. [ 2.747234] radeon 0000:00:10.0: enabling device (0006 -> 0007) [ 2.748887] [drm] initializing kernel modesetting (RV280 0x1002:0x5962 0x1002:0x5962). [ 2.748898] [drm] Forcing AGP to PCI mode [ 2.748913] [drm] register mmio base: 0x90000000 [ 2.748916] [drm] register mmio size: 65536 [ 2.748966] radeon 0000:00:10.0: Invalid ROM contents [ 2.748991] radeon 0000:00:10.0: Invalid ROM contents [ 2.749002] [drm:radeon_get_bios] *ERROR* Unable to locate a BIOS ROM [ 2.749022] [drm] Using device-tree clock info [ 2.749028] [drm] Generation 2 PCI interface, using max accessible memory [ 2.749035] radeon 0000:00:10.0: RADEON_CONFIG_APER_0_BASE: 0x9800000098000000 (my message) [ 2.749041] radeon 0000:00:10.0: VRAM: 128M 0x0000000098000000 - 0x000000009FFFFFFF (64M used) [ 2.749046] radeon 0000:00:10.0: GTT in radeon_vram_location: 512M 0x0000000000000000 - 0x0000000000000000 (my message) [ 2.749053] radeon 0000:00:10.0: GTT: 512M 0x0000000078000000 - 0x0000000097FFFFFF [ 2.749066] [drm] Detected VRAM RAM=128M, BAR=128M [ 2.749070] [drm] RAM width 64bits DDR [ 2.752299] [TTM] Zone kernel: Available graphics memory: 381972 kiB [ 2.752305] [TTM] Zone highmem: Available graphics memory: 513044 kiB [ 2.752309] [TTM] Initializing pool allocator [ 2.752318] [TTM] Initializing DMA pool allocator [ 2.752391] [drm] radeon: 64M of VRAM memory ready [ 2.752396] [drm] radeon: 512M of GTT memory ready. [ 2.752438] [drm] GART: num cpu pages 131072, num gpu pages 131072 [ 2.762558] [drm] radeon: ib pool ready. [ 2.855566] [drm] PCIE GART of 512M enabled (table at 0x0000000002880000). ... [ 2.874349] radeon 0000:00:10.0: WB disabled [ 2.874367] [drm] fence driver on ring 0 use gpu addr 0x78000000 and cpu addr 0xc256e000 [ 2.875151] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [ 2.875158] [drm] Driver supports precise vblank timestamp query. [ 2.875194] [drm] radeon: irq initialized. [ 2.876030] [drm] Loading R200 Microcode [ 2.895607] [drm] radeon: ring at 0x0000000078001000 [ 2.895634] [drm] ring test succeeded in 0 usecs AGP mode 1: [ 0.852235] Linux agpgart interface v0.103 [ 0.852262] agpgart-uninorth 0000:00:0b.0: Apple UniNorth 2 chipset [ 0.853324] agpgart-uninorth 0000:00:0b.0: configuring for size idx: 64 [ 0.853404] agpgart-uninorth 0000:00:0b.0: AGP aperture is 256M @ 0x0 ... [ 2.548750] [drm] Initialized drm 1.1.0 20060810 ... [ 2.751298] [drm] radeon kernel modesetting enabled. [ 2.751414] radeon 0000:00:10.0: enabling device (0006 -> 0007) [ 2.760316] [drm] initializing kernel modesetting (RV280 0x1002:0x5962 0x1002:0x5962). [ 2.760667] [drm] register mmio base: 0x90000000 [ 2.760671] [drm] register mmio size: 65536 [ 2.761003] radeon 0000:00:10.0: Invalid ROM contents [ 2.761331] radeon 0000:00:10.0: Invalid ROM contents [ 2.761347] [drm:radeon_get_bios] *ERROR* Unable to locate a BIOS ROM [ 2.761368] [drm] Using device-tree clock info [ 2.761398] [drm] AGP mode requested: 1 [ 2.761502] agpgart-uninorth 0000:00:0b.0: putting AGP V2 device into 1x mode [ 2.761510] radeon 0000:00:10.0: putting AGP V2 device into 1x mode [ 2.763545] radeon 0000:00:10.0: GTT: 256M 0x00000000 - 0x0FFFFFFF [ 2.763576] [drm] Generation 2 PCI interface, using max accessible memory [ 2.763583] radeon 0000:00:10.0: RADEON_CONFIG_APER_0_BASE: 0x9800000098000000 (my message) [ 2.763590] radeon 0000:00:10.0: VRAM: 128M 0x0000000098000000 - 0x000000009FFFFFFF (64M used) [ 2.763595] radeon 0000:00:10.0: GTT in radeon_vram_location: 256M 0x0000000000000000 - 0x000000000FFFFFFF (my message) [ 2.763697] [drm] Detected VRAM RAM=128M, BAR=128M [ 2.763702] [drm] RAM width 64bits DDR [ 2.766293] [TTM] Zone kernel: Available graphics memory: 381972 kiB [ 2.766299] [TTM] Zone highmem: Available graphics memory: 513044 kiB [ 2.766303] [TTM] Initializing pool allocator [ 2.766313] [TTM] Initializing DMA pool allocator [ 2.766405] [drm] radeon: 64M of VRAM memory ready [ 2.766499] [drm] radeon: 256M of GTT memory ready. [ 2.766655] [drm] radeon: ib pool ready. ... [ 2.876427] [drm] fence driver on ring 0 use gpu addr 0x00000000 and cpu addr 0xf137c000 [ 2.876435] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [ 2.876439] [drm] Driver supports precise vblank timestamp query. [ 2.876472] [drm] radeon: irq initialized. [ 2.877451] [drm] Loading R200 Microcode [ 2.884498] [drm] radeon: ring at 0x0000000000001000 [ 2.884572] [drm] ring test succeeded in 1 usecs [ 2.885156] [drm] ib test succeeded in 0 usecs i'm not certain whether gpu addr 0 is okay for the fence driver or whether the gtt location is okay (according to the comment in radeon_gtt_location it should be placed before or after VRAM) In PCI mode it ends at 0x0000000097FFFFFF and VRAM starts directly after at <big><big>0x0000000098000000</big>.</big> <big><big>In AGP mode GTT and VRAM are completely unrelated.</big></big> Other than that it looks like the alignment thing isn't the problem. Cheers Jochen </body> </html>