tree: https://github.com/HabanaAI/linux.git habanalabs-next head: 8397964b6986225daf410b3d6b36a8ffc3691d94 commit: f6a86ac0c29702622774e63f41d5bcdebdf4a300 [41/42] habanalabs: Add an option to map CB to device MMU config: powerpc-randconfig-r011-20200909 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 0a5dc7effb191eff740e0e7ae7bd8e1f6bdb3ad9) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu git checkout f6a86ac0c29702622774e63f41d5bcdebdf4a300 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): va_block->start, bus_addr); ^~~~~~~~ include/linux/dev_printk.h:104:32: note: expanded from macro 'dev_err' _dev_err(dev, dev_fmt(fmt), ##__VA_ARGS__) ~~~ ^~~~~~~~~~~ 1 warning generated. # https://github.com/HabanaAI/linux/commit/f6a86ac0c29702622774e63f41d5bcde... git remote add habanaai https://github.com/HabanaAI/linux.git git fetch --no-tags habanaai habanalabs-next git checkout f6a86ac0c29702622774e63f41d5bcdebdf4a300 vim +77 drivers/misc/habanalabs/common/command_buffer.c 15 16 static int cb_map_mem(struct hl_ctx *ctx, struct hl_cb *cb) 17 { 18 struct hl_device *hdev = ctx->hdev; 19 struct asic_fixed_properties *prop = &hdev->asic_prop; 20 struct hl_vm_va_block *va_block, *tmp; 21 dma_addr_t bus_addr; 22 u64 virt_addr; 23 u32 page_size = prop->pmmu.page_size; 24 s32 offset; 25 int rc; 26 27 if (!hdev->supports_cb_mapping) { 28 dev_err_ratelimited(hdev->dev, 29 "Cannot map CB because no VA range is allocated for CB mapping\n"); 30 return -EINVAL; 31 } 32 33 if (!hdev->mmu_enable) { 34 dev_err_ratelimited(hdev->dev, 35 "Cannot map CB because MMU is disabled\n"); 36 return -EINVAL; 37 } 38 39 INIT_LIST_HEAD(&cb->va_block_list); 40 41 for (bus_addr = cb->bus_address; 42 bus_addr < cb->bus_address + cb->size; 43 bus_addr += page_size) { 44 45 virt_addr = (u64) gen_pool_alloc(ctx->cb_va_pool, page_size); 46 if (!virt_addr) { 47 dev_err(hdev->dev, 48 "Failed to allocate device virtual address for CB\n"); 49 rc = -ENOMEM; 50 goto err_va_pool_free; 51 } 52 53 va_block = kzalloc(sizeof(*va_block), GFP_KERNEL); 54 if (!va_block) { 55 rc = -ENOMEM; 56 gen_pool_free(ctx->cb_va_pool, virt_addr, page_size); 57 goto err_va_pool_free; 58 } 59 60 va_block->start = virt_addr; 61 va_block->end = virt_addr + page_size; 62 va_block->size = page_size; 63 list_add_tail(&va_block->node, &cb->va_block_list); 64 } 65 66 mutex_lock(&ctx->mmu_lock); 67 68 bus_addr = cb->bus_address; 69 offset = 0; 70 list_for_each_entry(va_block, &cb->va_block_list, node) { 71 rc = hl_mmu_map(ctx, va_block->start, bus_addr, va_block->size, 72 list_is_last(&va_block->node, 73 &cb->va_block_list)); 74 if (rc) { 75 dev_err(hdev->dev, 76 "Failed to map va %#llx to CB's pa %#llx\n", 78 goto err_va_umap; 79 } 80 81 bus_addr += va_block->size; 82 offset += va_block->size; 83 } 84 85 hdev->asic_funcs->mmu_invalidate_cache(hdev, false, VM_TYPE_USERPTR); 86 87 mutex_unlock(&ctx->mmu_lock); 88 89 cb->is_mmu_mapped = true; 90 91 return 0; 92 93 err_va_umap: 94 list_for_each_entry(va_block, &cb->va_block_list, node) { 95 if (offset <= 0) 96 break; 97 hl_mmu_unmap(ctx, va_block->start, va_block->size, 98 offset <= va_block->size); 99 offset -= va_block->size; 100 } 101 102 hdev->asic_funcs->mmu_invalidate_cache(hdev, true, VM_TYPE_USERPTR); 103 104 mutex_unlock(&ctx->mmu_lock); 105 106 err_va_pool_free: 107 list_for_each_entry_safe(va_block, tmp, &cb->va_block_list, node) { 108 gen_pool_free(ctx->cb_va_pool, va_block->start, va_block->size); 109 list_del(&va_block->node); 110 kfree(va_block); 111 } 112 113 return rc; 114 } 115 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org