From 40794dfd20e08118fc1a4fd6d3d885fc65cdda43 Mon Sep 17 00:00:00 2001 From: YiPeng Chai Date: Fri, 6 Jan 2023 14:04:15 +0800 Subject: drm/amdgpu: Fixed bug on error when unloading amdgpu MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Fixed bug on error when unloading amdgpu. The error message is as follows: [ 377.706202] kernel BUG at drivers/gpu/drm/drm_buddy.c:278! [ 377.706215] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [ 377.706222] CPU: 4 PID: 8610 Comm: modprobe Tainted: G IOE 6.0.0-thomas #1 [ 377.706231] Hardware name: ASUS System Product Name/PRIME Z390-A, BIOS 2004 11/02/2021 [ 377.706238] RIP: 0010:drm_buddy_free_block+0x26/0x30 [drm_buddy] [ 377.706264] Code: 00 00 00 90 0f 1f 44 00 00 48 8b 0e 89 c8 25 00 0c 00 00 3d 00 04 00 00 75 10 48 8b 47 18 48 d3 e0 48 01 47 28 e9 fa fe ff ff <0f> 0b 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 41 54 55 48 89 f5 53 [ 377.706282] RSP: 0018:ffffad2dc4683cb8 EFLAGS: 00010287 [ 377.706289] RAX: 0000000000000000 RBX: ffff8b1743bd5138 RCX: 0000000000000000 [ 377.706297] RDX: ffff8b1743bd5160 RSI: ffff8b1743bd5c78 RDI: ffff8b16d1b25f70 [ 377.706304] RBP: ffff8b1743bd59e0 R08: 0000000000000001 R09: 0000000000000001 [ 377.706311] R10: ffff8b16c8572400 R11: ffffad2dc4683cf0 R12: ffff8b16d1b25f70 [ 377.706318] R13: ffff8b16d1b25fd0 R14: ffff8b1743bd59c0 R15: ffff8b16d1b25f70 [ 377.706325] FS: 00007fec56c72c40(0000) GS:ffff8b1836500000(0000) knlGS:0000000000000000 [ 377.706334] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 377.706340] CR2: 00007f9b88c1ba50 CR3: 0000000110450004 CR4: 00000000003706e0 [ 377.706347] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 377.706354] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 377.706361] Call Trace: [ 377.706365] [ 377.706369] drm_buddy_free_list+0x2a/0x60 [drm_buddy] [ 377.706376] amdgpu_vram_mgr_fini+0xea/0x180 [amdgpu] [ 377.706572] amdgpu_ttm_fini+0x12e/0x1a0 [amdgpu] [ 377.706650] amdgpu_bo_fini+0x22/0x90 [amdgpu] [ 377.706727] gmc_v11_0_sw_fini+0x26/0x30 [amdgpu] [ 377.706821] amdgpu_device_fini_sw+0xa1/0x3c0 [amdgpu] [ 377.706897] amdgpu_driver_release_kms+0x12/0x30 [amdgpu] [ 377.706975] drm_dev_release+0x20/0x40 [drm] [ 377.707006] release_nodes+0x35/0xb0 [ 377.707014] devres_release_all+0x8b/0xc0 [ 377.707020] device_unbind_cleanup+0xe/0x70 [ 377.707027] device_release_driver_internal+0xee/0x160 [ 377.707033] driver_detach+0x44/0x90 [ 377.707039] bus_remove_driver+0x55/0xe0 [ 377.707045] pci_unregister_driver+0x3b/0x90 [ 377.707052] amdgpu_exit+0x11/0x6c [amdgpu] [ 377.707194] __x64_sys_delete_module+0x142/0x2b0 [ 377.707201] ? fpregs_assert_state_consistent+0x22/0x50 [ 377.707208] ? exit_to_user_mode_prepare+0x3e/0x190 [ 377.707215] do_syscall_64+0x38/0x90 [ 377.707221] entry_SYSCALL_64_after_hwframe+0x63/0xcd Signed-off-by: YiPeng Chai Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c index faa12146635c..9fa1d814508a 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c @@ -882,7 +882,7 @@ void amdgpu_vram_mgr_fini(struct amdgpu_device *adev) kfree(rsv); list_for_each_entry_safe(rsv, temp, &mgr->reserved_pages, blocks) { - drm_buddy_free_list(&mgr->mm, &rsv->blocks); + drm_buddy_free_list(&mgr->mm, &rsv->allocated); kfree(rsv); } drm_buddy_fini(&mgr->mm); -- cgit From 2866cc09617991cb4f9f36fbebdbba966fe5a21a Mon Sep 17 00:00:00 2001 From: Shane Xiao Date: Sat, 18 Feb 2023 11:58:45 +0800 Subject: drm/amdgpu: optimize VRAM allocation when using drm buddy Since the VRAM manager changed from drm mm to drm buddy. It's not necessary to allocate 2MB aligned VRAM for more than 2MB unaligned size, and then do trim. This method improves the allocation efficiency and reduces memory fragmentation. v2: Correct the remainder operation Signed-off-by: Shane Xiao Reviewed-by: Arunpravin Paneer Selvam Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c index 9fa1d814508a..43d6a9d6a538 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c @@ -453,7 +453,8 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man, /* Limit maximum size to 2GiB due to SG table limitations */ size = min(remaining_size, 2ULL << 30); - if (size >= (u64)pages_per_block << PAGE_SHIFT) + if ((size >= (u64)pages_per_block << PAGE_SHIFT) && + !(size & (((u64)pages_per_block << PAGE_SHIFT) - 1))) min_block_size = (u64)pages_per_block << PAGE_SHIFT; cur_size = size; -- cgit