drivers/iommu/bcm2712-iommu.c:151:24: error: implicit declaration of function 'FIELD_GET'

drivers/iommu/bcm2712-iommu.c:151:24: error: implicit declaration of function 'FIELD_GET'

[kernel test robot]

:::::: 
:::::: Manual check reason: "bisect to a FBC not belonging to original linux-review patches: branch: linux-review/Daniel-Drake/generic_pt-allow-missing-sw-bit-in-DMA_INCOHERENT-case/20260728-104924, commit: 0ee3a30c51b6df9d40444e59dde79947e9be7e09"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: Daniel Drake <dan@reactivated.net>
CC: 0day robot <lkp@intel.com>

tree:   https://github.com/intel-lab-lkp/linux/commits/Daniel-Drake/generic_pt-allow-missing-sw-bit-in-DMA_INCOHERENT-case/20260728-104924
head:   dfd34af1fe7ce4108ac5744c4953720d46fad45e
commit: 0ee3a30c51b6df9d40444e59dde79947e9be7e09 iommu: Add Broadcom BCM2712 IOMMU driver
date:   7 days ago
:::::: branch date: 7 days ago
:::::: commit date: 7 days ago
config: nios2-allmodconfig (https://download.01.org/0day-ci/archive/20260804/202608041236.1JgQmtPX-lkp@intel.com/config)
compiler: nios2-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260804/202608041236.1JgQmtPX-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202608041236.1JgQmtPX-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

   drivers/iommu/bcm2712-iommu.c: In function 'bcm2712_iommu_init':
>> drivers/iommu/bcm2712-iommu.c:151:24: error: implicit declaration of function 'FIELD_GET' [-Werror=implicit-function-declaration]
     151 |         u32 pa_width = FIELD_GET(MMMU_DEBUG_INFO_PA_WIDTH_MASK, u);
         |                        ^~~~~~~~~
   In file included from drivers/iommu/bcm2712-iommu.c:42:
   drivers/iommu/bcm2712-iommu.c: In function 'bcm2712_iommu_domain_alloc':
>> drivers/iommu/bcm2712-iommu.h:18:34: warning: conversion from 'long long unsigned int' to 'dma_addr_t' {aka 'unsigned int'} changes value from '42949672960' to '0' [-Woverflow]
      18 | #define BCM2712_APERTURE_BASE    (40ULL << 30)
         |                                  ^
   drivers/iommu/bcm2712-iommu.c:437:48: note: in expansion of macro 'BCM2712_APERTURE_BASE'
     437 |         domain->base.geometry.aperture_start = BCM2712_APERTURE_BASE;
         |                                                ^~~~~~~~~~~~~~~~~~~~~
   drivers/iommu/bcm2712-iommu.h:20:34: warning: conversion from 'long long unsigned int' to 'dma_addr_t' {aka 'unsigned int'} changes value from '47244640255' to '4294967295' [-Woverflow]
      20 | #define BCM2712_APERTURE_END     (BCM2712_APERTURE_BASE + BCM2712_APERTURE_SIZE)
         |                                  ^
   drivers/iommu/bcm2712-iommu.c:438:46: note: in expansion of macro 'BCM2712_APERTURE_END'
     438 |         domain->base.geometry.aperture_end = BCM2712_APERTURE_END - 1;
         |                                              ^~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/FIELD_GET +151 drivers/iommu/bcm2712-iommu.c

0ee3a30c51b6df Daniel Drake 2026-07-27  146  
0ee3a30c51b6df Daniel Drake 2026-07-27  147  static void bcm2712_iommu_init(struct bcm2712_iommu *mmu)
0ee3a30c51b6df Daniel Drake 2026-07-27  148  {
0ee3a30c51b6df Daniel Drake 2026-07-27  149  	unsigned int bigpage_width, superpage_width;
0ee3a30c51b6df Daniel Drake 2026-07-27  150  	u32 u = MMU_RD(MMMU_DEBUG_INFO_OFFSET);
0ee3a30c51b6df Daniel Drake 2026-07-27 @151  	u32 pa_width = FIELD_GET(MMMU_DEBUG_INFO_PA_WIDTH_MASK, u);
0ee3a30c51b6df Daniel Drake 2026-07-27  152  
0ee3a30c51b6df Daniel Drake 2026-07-27  153  	dev_dbg(mmu->dev, "DEBUG_INFO = 0x%08x\n", u);
0ee3a30c51b6df Daniel Drake 2026-07-27  154  	WARN_ON(FIELD_GET(MMMU_DEBUG_INFO_VERSION_MASK, u) < 4 ||
0ee3a30c51b6df Daniel Drake 2026-07-27  155  		FIELD_GET(MMMU_DEBUG_INFO_VA_WIDTH_MASK, u) < 6 ||
0ee3a30c51b6df Daniel Drake 2026-07-27  156  		pa_width < 6 || !(u & MMMU_DEBUG_INFO_BYPASS));
0ee3a30c51b6df Daniel Drake 2026-07-27  157  
0ee3a30c51b6df Daniel Drake 2026-07-27  158  	dma_set_mask_and_coherent(mmu->dev, DMA_BIT_MASK(pa_width + 30u));
0ee3a30c51b6df Daniel Drake 2026-07-27  159  
0ee3a30c51b6df Daniel Drake 2026-07-27  160  	bigpage_width = FIELD_GET(MMMU_DEBUG_INFO_BIGPAGE_WIDTH_MASK, u);
0ee3a30c51b6df Daniel Drake 2026-07-27  161  	if (bigpage_width)
0ee3a30c51b6df Daniel Drake 2026-07-27  162  		mmu->bigpage_size = IOMMU_PAGE_SIZE << bigpage_width;
0ee3a30c51b6df Daniel Drake 2026-07-27  163  
0ee3a30c51b6df Daniel Drake 2026-07-27  164  	superpage_width = FIELD_GET(MMMU_DEBUG_INFO_SUPERPAGE_WIDTH_MASK, u);
0ee3a30c51b6df Daniel Drake 2026-07-27  165  	if (superpage_width)
0ee3a30c51b6df Daniel Drake 2026-07-27  166  		mmu->superpage_size = IOMMU_PAGE_SIZE << superpage_width;
0ee3a30c51b6df Daniel Drake 2026-07-27  167  
0ee3a30c51b6df Daniel Drake 2026-07-27  168  	/* Disable MMU and clear sticky flags; meanwhile flush the TLB */
0ee3a30c51b6df Daniel Drake 2026-07-27  169  	MMU_WR(MMMU_CTRL_OFFSET, MMMU_CTRL_CAP_EXCEEDED | MMMU_CTRL_PT_INVALID |
0ee3a30c51b6df Daniel Drake 2026-07-27  170  					 MMMU_CTRL_WRITE_VIOLATION |
0ee3a30c51b6df Daniel Drake 2026-07-27  171  					 MMMU_CTRL_STATS_CLEAR |
0ee3a30c51b6df Daniel Drake 2026-07-27  172  					 MMMU_CTRL_TLB_CLEAR);
0ee3a30c51b6df Daniel Drake 2026-07-27  173  
0ee3a30c51b6df Daniel Drake 2026-07-27  174  	/* Put MMU into 2-level mode */
0ee3a30c51b6df Daniel Drake 2026-07-27  175  	MMU_WR(MMMU_MISC_OFFSET,
0ee3a30c51b6df Daniel Drake 2026-07-27  176  	       MMU_RD(MMMU_MISC_OFFSET) & ~MMMU_MISC_SINGLE_TABLE);
0ee3a30c51b6df Daniel Drake 2026-07-27  177  }
0ee3a30c51b6df Daniel Drake 2026-07-27  178  

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