linux-kernel - [rmk-arm:cex7 160/170] drivers/bus/fsl-mc/fsl-mc-bus.c:1111:39: error: implicit declaration of function 'iommu_get_dma_domain'; did you mean 'iommu_is_dma

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Date:   Thu, 20 Jan 2022 06:25:27 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [rmk-arm:cex7 160/170] drivers/bus/fsl-mc/fsl-mc-bus.c:1111:39:
 error: implicit declaration of function 'iommu_get_dma_domain'; did you mean
 'iommu_is_dma_domain'?

tree:   git://git.armlinux.org.uk/~rmk/linux-arm cex7
head:   cdfacabed5a40f44a694e4254ef37fcb4fee1e62
commit: 9d9cfaf6528a80634c1aa12d94112e3adb05bdbb [160/170] bus: fsl-mc: add IOMMU mappings for MC firmware and DCFG
config: arm-randconfig-r004-20220119 (https://download.01.org/0day-ci/archive/20220120/202201200604.v1t4HdLH-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0
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
        git remote add rmk-arm git://git.armlinux.org.uk/~rmk/linux-arm
        git fetch --no-tags rmk-arm cex7
        git checkout 9d9cfaf6528a80634c1aa12d94112e3adb05bdbb
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash drivers/bus/fsl-mc/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

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

   drivers/bus/fsl-mc/fsl-mc-bus.c: In function 'fsl_mc_setup_iommu':
>> drivers/bus/fsl-mc/fsl-mc-bus.c:1111:39: error: implicit declaration of function 'iommu_get_dma_domain'; did you mean 'iommu_is_dma_domain'? [-Werror=implicit-function-declaration]
    1111 |         struct iommu_domain *domain = iommu_get_dma_domain(dev);
         |                                       ^~~~~~~~~~~~~~~~~~~~
         |                                       iommu_is_dma_domain
>> drivers/bus/fsl-mc/fsl-mc-bus.c:1111:39: warning: initialization of 'struct iommu_domain *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
   cc1: some warnings being treated as errors


vim +1111 drivers/bus/fsl-mc/fsl-mc-bus.c

  1108	
  1109	static void fsl_mc_setup_iommu(struct device *dev, struct fsl_mc *mc)
  1110	{
> 1111		struct iommu_domain *domain = iommu_get_dma_domain(dev);
  1112		struct resource dcfg_res = DEFINE_RES_MEM(0x01e00000, 0x10000);
  1113		struct device_node *np;
  1114		u64 firmware_base;
  1115		u64 mc_ram_base;
  1116		u32 mc_ram_size;
  1117		u32 mcfbalr;
  1118		u32 mcfbahr;
  1119		int ret;
  1120	
  1121		if (!domain) {
  1122			dev_err(dev, "Missing IOMMU domain - MC firmware will crash\n");
  1123			return;
  1124		}
  1125	
  1126		mcfbalr = readl(mc->fsl_mc_regs + FSL_MC_FBALR);
  1127		mcfbahr = readl(mc->fsl_mc_regs + FSL_MC_FBAHR);
  1128	
  1129		firmware_base = mcfbalr & MCFBAR_LOW;
  1130		firmware_base |= (u64)(mcfbahr & MCFBAR_HIGH) << 32;
  1131	
  1132		/* Calculate the size of MC RAM. */
  1133		mc_ram_size = mcfbalr & MCFBAR_MEMSZ;
  1134		if (mc_ram_size != 255)
  1135			mc_ram_size = (mc_ram_size + 1) * SZ_256M;
  1136		else
  1137			mc_ram_size = SZ_128M;
  1138	
  1139		/*
  1140		 * Calculate base address of MC RAM. U-Boot says:
  1141		 * "As per MC design document, MC initial base address should be least
  1142		 * significant 512MB address of MC private memory, i.e. address should
  1143		 * point to end address masked with 512MB offset in private DRAM block."
  1144		 * and uses the following calculation:
  1145		 *
  1146		 *    (gd->arch.resv_ram + mc_ram_size - 1) &
  1147		 *       MC_RAM_BASE_ADDR_ALIGNMENT_MASK
  1148		 *
  1149		 * where gd->arch.resv_ram is the start of the MC reserved RAM block,
  1150		 * and is itself aligned to 512MB.
  1151		 *
  1152		 * Hence, if the reserved RAM starts at 0x2780000000 and is 0x70000000
  1153		 * in size, then the firmware address will be 0x27e0000000. However,
  1154		 * if it is 512M, then the reserved RAM and the firmware base addresses
  1155		 * will be identical.
  1156		 */
  1157		mc_ram_base = ALIGN(firmware_base - mc_ram_size + 1, SZ_512M);
  1158	
  1159		/*
  1160		 * Give MC firmware access to the MC RAM, which includes the MC
  1161		 * firmware image itself.
  1162		 */
  1163		ret = iommu_map(domain, mc_ram_base, mc_ram_base, mc_ram_size,
  1164				IOMMU_CACHE | IOMMU_WRITE | IOMMU_READ);
  1165		if (ret)
  1166			dev_err(dev, "Failed to setup IOMMU mapping for MC RAM: %pe\n",
  1167				ERR_PTR(ret));
  1168	
  1169		/* Give firmware access to the DCFG so it can read the SVR register */
  1170		np = of_find_compatible_node(NULL, NULL, "fsl,lx2160a-dcfg");
  1171		if (np) {
  1172			ret = of_address_to_resource(np, 0, &dcfg_res);
  1173			if (ret) {
  1174				dev_err(dev, "Failed to get dcfg resource: %pe\n",
  1175					ERR_PTR(ret));
  1176				return;
  1177			}
  1178		} else {
  1179			dev_warn(dev,
  1180				 "Failed to find dcfg node - using default addresses\n");
  1181		}
  1182	
  1183		ret = iommu_map(domain, dcfg_res.start, dcfg_res.start,
  1184				resource_size(&dcfg_res), IOMMU_READ);
  1185		if (ret)
  1186			dev_err(dev, "Failed to setup IOMMU mapping for DCFG: %pe\n",
  1187				ERR_PTR(ret));
  1188	}
  1189	

---
0-DAY CI Kernel Test Service, Intel Corporation
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