[asahilinux:bits/020-t6000-dart 6/21] drivers/iommu/apple-dart.c:610:34: warning: implicit conversion from 'unsigned long long' to 'dma_addr_t' (aka 'unsigned int') changes value from 18446744073709551615 to 4294967295

[asahilinux:bits/020-t6000-dart 6/21] drivers/iommu/apple-dart.c:610:34: warning: implicit conversion from 'unsigned long long' to 'dma_addr_t' (aka 'unsigned int') changes value from 18446744073709551615 to 4294967295

[kernel test robot]

tree:   https://github.com/AsahiLinux/linux bits/020-t6000-dart
head:   05458bcb879b99768bb4621c212651a1316a4e95
commit: da75d5ce709f288f6e4902dcf6fe5d7113995bdd [6/21] iommu: dart: Add t8110 DART support
config: arm-randconfig-r046-20230206 (https://download.01.org/0day-ci/archive/20230206/202302060829.LqIe1phI-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 4196ca3278f78c6e19246e54ab0ecb364e37d66a)
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 arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://github.com/AsahiLinux/linux/commit/da75d5ce709f288f6e4902dcf6fe5d7113995bdd
        git remote add asahilinux https://github.com/AsahiLinux/linux
        git fetch --no-tags asahilinux bits/020-t6000-dart
        git checkout da75d5ce709f288f6e4902dcf6fe5d7113995bdd
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/iommu/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/iommu/apple-dart.c:610:34: warning: implicit conversion from 'unsigned long long' to 'dma_addr_t' (aka 'unsigned int') changes value from 18446744073709551615 to 4294967295 [-Wconstant-conversion]
           domain->geometry.aperture_end = DMA_BIT_MASK(dart->ias);
                                         ~ ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/dma-mapping.h:76:40: note: expanded from macro 'DMA_BIT_MASK'
   #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
                                          ^~~~~
   1 warning generated.


vim +610 drivers/iommu/apple-dart.c

   571	
   572	static int apple_dart_finalize_domain(struct iommu_domain *domain,
   573					      struct apple_dart_master_cfg *cfg)
   574	{
   575		struct apple_dart_domain *dart_domain = to_dart_domain(domain);
   576		struct apple_dart *dart = cfg->stream_maps[0].dart;
   577		struct io_pgtable_cfg pgtbl_cfg;
   578		int ret = 0;
   579		int i, j;
   580	
   581		mutex_lock(&dart_domain->init_lock);
   582	
   583		if (dart_domain->finalized)
   584			goto done;
   585	
   586		for (i = 0; i < MAX_DARTS_PER_DEVICE; ++i) {
   587			dart_domain->stream_maps[i].dart = cfg->stream_maps[i].dart;
   588			for (j = 0; j < BITS_TO_LONGS(dart->num_streams); j++)
   589				atomic_long_set(&dart_domain->stream_maps[i].sidmap[j],
   590						cfg->stream_maps[i].sidmap[j]);
   591		}
   592	
   593		pgtbl_cfg = (struct io_pgtable_cfg){
   594			.pgsize_bitmap = dart->pgsize,
   595			.ias = dart->ias,
   596			.oas = dart->oas,
   597			.coherent_walk = 1,
   598			.iommu_dev = dart->dev,
   599		};
   600	
   601		dart_domain->pgtbl_ops =
   602			alloc_io_pgtable_ops(dart->hw->fmt, &pgtbl_cfg, domain);
   603		if (!dart_domain->pgtbl_ops) {
   604			ret = -ENOMEM;
   605			goto done;
   606		}
   607	
   608		domain->pgsize_bitmap = pgtbl_cfg.pgsize_bitmap;
   609		domain->geometry.aperture_start = 0;
 > 610		domain->geometry.aperture_end = DMA_BIT_MASK(dart->ias);
   611		domain->geometry.force_aperture = true;
   612	
   613		dart_domain->finalized = true;
   614	
   615	done:
   616		mutex_unlock(&dart_domain->init_lock);
   617		return ret;
   618	}
   619	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests