[PATCH v2] remoteproc: imx_dsp_rproc: add custom memory copy implementation for i.MX DSP Cores

[kernel test robot]

Hi Iuliana,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on remoteproc/rproc-next]
[also build test WARNING on linus/master v6.2-rc6]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Iuliana-Prodan-OSS/remoteproc-imx_dsp_rproc-add-custom-memory-copy-implementation-for-i-MX-DSP-Cores/20230201-011011
base:   git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux.git rproc-next
patch link:    https://lore.kernel.org/r/20230131170436.31280-1-iuliana.prodan%40oss.nxp.com
patch subject: [PATCH v2] remoteproc: imx_dsp_rproc: add custom memory copy implementation for i.MX DSP Cores
config: arm-allyesconfig (https://download.01.org/0day-ci/archive/20230204/202302041520.m9CY8p6U-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0
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
        # https://github.com/intel-lab-lkp/linux/commit/65bca8739891378a92cf6a5774e2ad72630a4276
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Iuliana-Prodan-OSS/remoteproc-imx_dsp_rproc-add-custom-memory-copy-implementation-for-i-MX-DSP-Cores/20230201-011011
        git checkout 65bca8739891378a92cf6a5774e2ad72630a4276
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/remoteproc/

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

All warnings (new ones prefixed by >>):

   In file included from include/linux/kernel.h:15,
                    from include/linux/clk.h:13,
                    from drivers/remoteproc/imx_dsp_rproc.c:6:
   drivers/remoteproc/imx_dsp_rproc.c: In function 'imx_dsp_rproc_memcpy':
>> drivers/remoteproc/imx_dsp_rproc.c:732:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     732 |         if (!IS_ALIGNED((u64)dest, 4))
         |                         ^
   include/linux/align.h:13:44: note: in definition of macro 'IS_ALIGNED'
      13 | #define IS_ALIGNED(x, a)                (((x) & ((typeof(x))(a) - 1)) == 0)
         |                                            ^
>> drivers/remoteproc/imx_dsp_rproc.c:732:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     732 |         if (!IS_ALIGNED((u64)dest, 4))
         |                         ^
   include/linux/align.h:13:58: note: in definition of macro 'IS_ALIGNED'
      13 | #define IS_ALIGNED(x, a)                (((x) & ((typeof(x))(a) - 1)) == 0)
         |                                                          ^
   drivers/remoteproc/imx_dsp_rproc.c: In function 'imx_dsp_rproc_memset':
   drivers/remoteproc/imx_dsp_rproc.c:776:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     776 |         if (!IS_ALIGNED((u64)addr, 4))
         |                         ^
   include/linux/align.h:13:44: note: in definition of macro 'IS_ALIGNED'
      13 | #define IS_ALIGNED(x, a)                (((x) & ((typeof(x))(a) - 1)) == 0)
         |                                            ^
   drivers/remoteproc/imx_dsp_rproc.c:776:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     776 |         if (!IS_ALIGNED((u64)addr, 4))
         |                         ^
   include/linux/align.h:13:58: note: in definition of macro 'IS_ALIGNED'
      13 | #define IS_ALIGNED(x, a)                (((x) & ((typeof(x))(a) - 1)) == 0)
         |                                                          ^


vim +732 drivers/remoteproc/imx_dsp_rproc.c

   717	
   718	/*
   719	 * Custom memory copy implementation for i.MX DSP Cores
   720	 *
   721	 * The IRAM is part of the HiFi DSP.
   722	 * According to hw specs only 32-bits writes are allowed.
   723	 */
   724	static int imx_dsp_rproc_memcpy(void *dest, const void *src, size_t size)
   725	{
   726		const u8 *src_byte = src;
   727		u32 affected_mask;
   728		u32 tmp;
   729		int i, q, r;
   730	
   731		/* destination must be 32bit aligned */
 > 732		if (!IS_ALIGNED((u64)dest, 4))
   733			return -EINVAL;
   734	
   735		q = size / 4;
   736		r = size % 4;
   737	
   738		/* __iowrite32_copy use 32bit size values so divide by 4 */
   739		__iowrite32_copy(dest, src, q);
   740	
   741		if (r) {
   742			affected_mask = (1 << (8 * r)) - 1;
   743	
   744			/* first read the 32bit data of dest, then change affected
   745			 * bytes, and write back to dest.
   746			 * For unaffected bytes, it should not be changed
   747			 */
   748			tmp = ioread32(dest + q * 4);
   749			tmp &= ~affected_mask;
   750	
   751			/* avoid reading after end of source */
   752			for (i = 0; i < r; i++)
   753				tmp |= (src_byte[q * 4 + i] << (8 * i));
   754	
   755			iowrite32(tmp, dest + q * 4);
   756		}
   757	
   758		return 0;
   759	}
   760	

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