Hi, 2011/8/23 Alex Deucher <[email protected]> > > > Not sure I understand it or not, but we're using the sideport way, and > > has a dedicated 128M DDR2 memory as VRAM. > > The default behavior of the system bios is to set up sideport memory > interleaved with stolen system memory. Unless your bios only enables > sideport you'll need to respect the stolen system memory used as vram. > Also, sideport memory has really limited memory bandwidth. It's a > powersaving feature as if you un-interleave the sideport memory, you > can put the display in sideport and stop memory access via the CPU. > For decent performance, you need to use system memory or interleaved > sideport and system memory. Got it, thanks. BTW, if using 128M sideport memory, will it occupy another 128M system memory in the default behavior?
> > > > > The details are at: > > * > > http://dev.lemote.com/files/upload/software/temp/Radeon.test/radeon_test.c > > * diff with original radeon_test_moves(): > > http://dev.lemote.com/files/upload/software/temp/Radeon.test/radeon_test.diff > > > > The new bo moving test is pass, but when I changed the bo size to 4M, > > the kernel panic with unaligned access at some point after bo moving > > test. The original radeon_test_moves() is ok for 4M bo size. Could > > someone reviews the new radeon_test_moves() to find if this was caused > > by some mistakes of the code or is a potential bug of the platform? > > See if the attached patch helps. It flushes the HDP caches if the > driver uses the wait_idle callback rather than flushing in the fence > emit. The patch doesn't work for me. P.S. due to we haven't finished a solid port to a newer version of kernel, the hack was done on the old 2.6.36 kernel(http://dev.lemote.com/cgit/linux-3A.git/) I did some more hack, and found if create/reserve/pin more bo in VRAM than available, it will cause unaligned access panic. And a simpler way to trigger kernel panic(but another kind of kernel panic): struct radeon_bo **vram_obj = NULL; uint64_t *vram_addr = NULL; unsigned i, n, size; n = 31; /* 30 is the maximum num of bo can be allocated successfully */ size = 4 * 1024 * 1024; vram_obj = kzalloc(n * sizeof(*vram_obj), GFP_KERNEL); vram_addr = kzalloc(n * sizeof(*vram_addr), GFP_KERNEL); for (i = 0; i < n; i++) { int r; /* Create bo lives in VRAM */ r = radeon_bo_create(rdev, NULL, size, true, RADEON_GEM_DOMAIN_VRAM, vram_obj + i); if (r) { DRM_ERROR("Failed to create VRAM object %d\n", i); break; } r = radeon_bo_reserve(vram_obj[i], false); if (unlikely(r != 0)) break; r = radeon_bo_pin(vram_obj[i], RADEON_GEM_DOMAIN_VRAM, vram_addr + i); if (r) { DRM_ERROR("Failed to pin VRAM object %d\n", i); break; } } /* If I comment the following, no kernel panic for me */ if (vram_obj) { for (i = 0; i < n; i++) { if (vram_obj[i]) { if (radeon_bo_is_reserved(vram_obj[i])) { radeon_bo_unpin(vram_obj[i]); radeon_bo_unreserve(vram_obj[i]); } radeon_bo_unref(&vram_obj[i]); } } kfree(vram_obj); } if (vram_addr) kfree(vram_addr); ---- The corresponding dmesg log: [ 1.125000] [drm] Initialized drm 1.1.0 20060810 [ 1.128906] [drm] radeon defaulting to kernel modesetting. [ 1.136718] [drm] radeon kernel modesetting enabled. [ 1.175781] [drm] initializing kernel modesetting (RS780 0x1002:0x9615). [ 1.183593] [drm] register mmio base: 0x48000000 [ 1.187500] [drm] register mmio size: 65536 [ 1.195312] radeon 0000:01:05.0: BAR 6: can't assign [??? 0x00000000 flags 0x0] (bogus alignment) [ 1.203125] ATOM BIOS: BR041389 [ 1.207031] radeon 0000:01:05.0: VRAM: 128M 0x10000000 - 0x17FFFFFF (128M used) [ 1.214843] radeon 0000:01:05.0: GTT: 512M 0x18000000 - 0x37FFFFFF [ 1.222656] [drm] Detected VRAM RAM=128M, BAR=128M [ 1.226562] [drm] RAM width 32bits DDR [ 1.230468] [TTM] Zone kernel: Available graphics memory: 464720 kiB. [ 1.238281] [TTM] Initializing pool allocator. [ 1.242187] [drm] radeon: 128M of VRAM memory ready [ 1.246093] [drm] radeon: 512M of GTT memory ready. [ 1.250000] [drm] radeon: irq initialized. [ 1.253906] [drm] GART: num cpu pages 32768, num gpu pages 131072 [ 1.265625] [drm] Loading RS780 Microcode [ 1.343750] [drm] ring test succeeded in 0 usecs [ 1.347656] [drm] radeon: ib pool ready. [ 1.351562] [drm] ib test succeeded in 0 usecs [ 1.355468] [drm] Enabling audio support [ 1.359375] radeon 0000:01:05.0: 980000013eecbe00 pin failed [ 1.367187] [drm:radeon_test_moves] *ERROR* Failed to pin VRAM object 31 [ 1.378906] radeon 0000:01:05.0: 980000013eecbe00 unpin not necessary [ 1.386718] CPU 3 Unable to handle kernel paging request at virtual address 0000000000000008, epc == ffffffff804aff08, ra == ffffffff804aff00 [ 1.398437] Oops[#1]: [ 1.402343] Cpu 3 [ 1.402343] $ 0 : 0000000000000000 000000001400fce0 980000013eecbe00 0000000000000000 [ 1.402343] $ 4 : 980000013e5e2f50 ffffffff8047a66c 0000000000000000 0000000000000000 [ 1.402343] $ 8 : 0000000000000000 980000000161c000 00004124924d2492 ffffffff81073f20 [ 1.402343] $12 : 0000000000000007 ffffffff810f3ee0 fffffffffffffffc ffffffff81073f28 [ 1.402343] $16 : 980000013eecbe00 980000013eecbe48 980000013e8f7d40 000000000000001f [ 1.402343] $20 : 980000013e8f7e00 980000013e8f7ef8 0000000000000028 980000013e5e2000 [ 1.402343] $24 : 0000000000000000 ffffffff804afedc [ 1.402343] $28 : 980000013e044000 980000013e047af0 980000013eecbe00 ffffffff804aff00 [ 1.402343] Hi : 0000000000000000 [ 1.402343] Lo : 00000000011694a8 [ 1.402343] epc : ffffffff804aff08 radeon_ttm_bo_destroy+0x2c/0x68 [ 1.402343] Not tainted [ 1.402343] ra : ffffffff804aff00 radeon_ttm_bo_destroy+0x24/0x68 [ 1.402343] Status: 1400fce3 KX SX UX KERNEL EXL IE [ 1.402343] Cause : 0000000c [ 1.402343] BadVA : 0000000000000008 [ 1.402343] PrId : 00006305 (ICT Loongson-3) [ 1.402343] Modules linked in: [ 1.402343] Process swapper (pid: 1, threadinfo=980000013e044000, task=980000013e078000, tls=0000000000000000) [ 1.402343] Stack : 980000013eecbe8c 980000013eecbe8c ffffffff8047a66c ffffffff803f056c [ 1.402343] 0000000000000028 980000013eecbe48 980000013e5e2530 ffffffff8047b478 [ 1.402343] 0000000000070000 980000013eecbe88 ffffffff8047b418 ffffffff803f056c [ 1.402343] 000000000000001f 980000013e5e2530 980000013eecbe48 ffffffff8047a950 [ 1.402343] 000000001400fce1 980000013e8f7cf8 980000013e5e3dc0 ffffffff804b0230 [ 1.402343] 0000000000000000 ffffffff8047a554 980000013e8f7cf8 980000013e8f7cf8 [ 1.402343] 980000013e8f7c00 ffffffff804f27bc 980000013e5e2000 0000000000000000 [ 1.402343] 00000000ffffffff 0000000000c20021 980000013e5db800 980000013e5dbbb8 [ 1.402343] 0000000000000004 0000000000000000 0000000000000000 ffffffff8049b85c [ 1.402343] 980000013e5db800 980000013e5e2000 fffffffffffffff4 ffffffff8049cc08 [ 1.402343] ... [ 1.402343] Call Trace: [ 1.402343] [<ffffffff804aff08>] radeon_ttm_bo_destroy+0x2c/0x68 [ 1.402343] [<ffffffff803f056c>] kref_put+0x70/0x90 [ 1.402343] [<ffffffff8047b478>] ttm_bo_release+0x60/0x78 [ 1.402343] [<ffffffff803f056c>] kref_put+0x70/0x90 [ 1.402343] [<ffffffff8047a950>] ttm_bo_unref+0x38/0x50 [ 1.402343] [<ffffffff804b0230>] radeon_bo_unref+0x3c/0x68 [ 1.402343] [<ffffffff804f27bc>] radeon_test_moves+0x174/0x1d0 [ 1.402343] [<ffffffff8049b85c>] radeon_device_init+0x474/0x4b4 [ 1.402343] [<ffffffff8049cc08>] radeon_driver_load_kms+0xcc/0x138 [ 1.402343] [<ffffffff8046c54c>] drm_get_pci_dev+0x140/0x230 [ 1.402343] [<ffffffff80406af0>] local_pci_probe+0x5c/0xd8 [ 1.402343] [<ffffffff80406f48>] pci_device_probe+0x5c/0x9c [ 1.402343] [<ffffffff80528690>] driver_probe_device+0xe4/0x1c0 [ 1.402343] [<ffffffff805287d8>] __driver_attach+0x6c/0xa4 [ 1.402343] [<ffffffff8052764c>] bus_for_each_dev+0x54/0x94 [ 1.402343] [<ffffffff80527e48>] bus_add_driver+0xbc/0x258 [ 1.402343] [<ffffffff80528ae4>] driver_register+0xc4/0x178 [ 1.402343] [<ffffffff80407310>] __pci_register_driver+0x50/0xe0 [ 1.402343] [<ffffffff802159dc>] do_one_initcall+0x88/0x174 [ 1.402343] [<ffffffff81078c60>] kernel_init+0x208/0x2bc [ 1.402343] [<ffffffff80217c84>] kernel_thread_helper+0x10/0x18 [ 1.402343] [ 1.402343] [ 1.402343] Code: 64840f50 de020008 de23ffb8 <fc620008> fc430000 de0401e0 fe30ffb8 fe100008 0c084d49 [ 1.402343] Disabling lock debugging due to kernel taint [ 1.750000] Kernel panic - not syncing: Attempted to kill init! Regards, - Chen Jie _______________________________________________ xorg-driver-ati mailing list [email protected] http://lists.x.org/mailman/listinfo/xorg-driver-ati
