drivers/dma/ppc4xx/adma.c:4100:31: sparse: sparse: incorrect type in assignment (different address spaces)

From: kernel test robot
Date: Tue May 18 2021 - 00:27:36 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 8ac91e6c6033ebc12c5c1e4aa171b81a662bd70f
commit: d991bb1c8da842a2a0b9dc83b1005e655783f861 include/linux/compiler-gcc.h: sparse can do constant folding of __builtin_bswap*()
date: 2 weeks ago
config: powerpc64-randconfig-s032-20210518 (attached as .config)
compiler: powerpc-linux-gcc (GCC) 9.3.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.3-341-g8af24329-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d991bb1c8da842a2a0b9dc83b1005e655783f861
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout d991bb1c8da842a2a0b9dc83b1005e655783f861
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=powerpc64

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

sparse warnings: (new ones prefixed by >>)
drivers/dma/ppc4xx/adma.c:1155:49: sparse: expected void const [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:1155:49: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:1157:38: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:1157:38: sparse: expected void [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:1157:38: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:909:25: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct dma_regs *dma_reg @@ got struct dma_regs [noderef] __iomem *dma_reg @@
drivers/dma/ppc4xx/adma.c:909:25: sparse: expected struct dma_regs *dma_reg
drivers/dma/ppc4xx/adma.c:909:25: sparse: got struct dma_regs [noderef] __iomem *dma_reg
drivers/dma/ppc4xx/adma.c:910:40: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:910:40: sparse: expected void const volatile [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:910:40: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:927:37: sparse: sparse: cast to restricted __le32
drivers/dma/ppc4xx/adma.c:972:32: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:972:32: sparse: expected void const volatile [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:972:32: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:977:40: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void volatile [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:977:40: sparse: expected void volatile [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:977:40: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:982:25: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct xor_regs *xor_reg @@ got struct xor_regs [noderef] __iomem *xor_reg @@
drivers/dma/ppc4xx/adma.c:982:25: sparse: expected struct xor_regs *xor_reg
drivers/dma/ppc4xx/adma.c:982:25: sparse: got struct xor_regs [noderef] __iomem *xor_reg
drivers/dma/ppc4xx/adma.c:983:34: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:983:34: sparse: expected void const [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:983:34: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:984:34: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:984:34: sparse: expected void [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:984:34: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:991:55: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:991:55: sparse: expected void const [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:991:55: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:993:51: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:993:51: sparse: expected void [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:993:51: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:995:51: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:995:51: sparse: expected void const [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:995:51: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:997:46: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:997:46: sparse: expected void [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:997:46: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:1006:35: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:1006:35: sparse: expected void const [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:1006:35: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:1025:25: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct dma_regs *dma_reg @@ got struct dma_regs [noderef] __iomem *dma_reg @@
drivers/dma/ppc4xx/adma.c:1025:25: sparse: expected struct dma_regs *dma_reg
drivers/dma/ppc4xx/adma.c:1025:25: sparse: got struct dma_regs [noderef] __iomem *dma_reg
drivers/dma/ppc4xx/adma.c:1029:31: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned short * @@
drivers/dma/ppc4xx/adma.c:1029:31: sparse: expected void const volatile [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:1029:31: sparse: got unsigned short *
drivers/dma/ppc4xx/adma.c:1029:60: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned short * @@
drivers/dma/ppc4xx/adma.c:1029:60: sparse: expected void const volatile [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:1029:60: sparse: got unsigned short *
drivers/dma/ppc4xx/adma.c:1030:31: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned short * @@
drivers/dma/ppc4xx/adma.c:1030:31: sparse: expected void const volatile [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:1030:31: sparse: got unsigned short *
drivers/dma/ppc4xx/adma.c:1030:60: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned short * @@
drivers/dma/ppc4xx/adma.c:1030:60: sparse: expected void const volatile [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:1030:60: sparse: got unsigned short *
drivers/dma/ppc4xx/adma.c:1036:25: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct xor_regs *xor_reg @@ got struct xor_regs [noderef] __iomem *xor_reg @@
drivers/dma/ppc4xx/adma.c:1036:25: sparse: expected struct xor_regs *xor_reg
drivers/dma/ppc4xx/adma.c:1036:25: sparse: got struct xor_regs [noderef] __iomem *xor_reg
drivers/dma/ppc4xx/adma.c:1037:37: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:1037:37: sparse: expected void const [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:1037:37: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:1051:48: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct xor_regs *xor_reg @@ got struct xor_regs [noderef] __iomem *xor_reg @@
drivers/dma/ppc4xx/adma.c:1051:48: sparse: expected struct xor_regs *xor_reg
drivers/dma/ppc4xx/adma.c:1051:48: sparse: got struct xor_regs [noderef] __iomem *xor_reg
drivers/dma/ppc4xx/adma.c:1053:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:1053:25: sparse: expected void const [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:1053:25: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:1060:41: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:1060:41: sparse: expected void [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:1060:41: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:1062:39: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:1062:39: sparse: expected void [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:1062:39: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:1063:25: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:1063:25: sparse: expected void [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:1063:25: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:1064:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:1064:33: sparse: expected void const [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:1064:33: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:1065:22: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:1065:22: sparse: expected void [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:1065:22: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:1078:48: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct dma_regs *dma_reg @@ got struct dma_regs [noderef] __iomem *dma_reg @@
drivers/dma/ppc4xx/adma.c:1078:48: sparse: expected struct dma_regs *dma_reg
drivers/dma/ppc4xx/adma.c:1078:48: sparse: got struct dma_regs [noderef] __iomem *dma_reg
drivers/dma/ppc4xx/adma.c:1088:26: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void volatile [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:1088:26: sparse: expected void volatile [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:1088:26: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:1208:25: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct xor_regs *xor_reg @@ got struct xor_regs [noderef] __iomem *xor_reg @@
drivers/dma/ppc4xx/adma.c:1208:25: sparse: expected struct xor_regs *xor_reg
drivers/dma/ppc4xx/adma.c:1208:25: sparse: got struct xor_regs [noderef] __iomem *xor_reg
drivers/dma/ppc4xx/adma.c:1212:30: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] __iomem *addr @@ got unsigned int * @@
drivers/dma/ppc4xx/adma.c:1212:30: sparse: expected void [noderef] __iomem *addr
drivers/dma/ppc4xx/adma.c:1212:30: sparse: got unsigned int *
drivers/dma/ppc4xx/adma.c:2775:62: sparse: sparse: Using plain integer as NULL pointer
drivers/dma/ppc4xx/adma.c:4092:14: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void *regs @@ got void [noderef] __iomem * @@
drivers/dma/ppc4xx/adma.c:4092:14: sparse: expected void *regs
drivers/dma/ppc4xx/adma.c:4092:14: sparse: got void [noderef] __iomem *
>> drivers/dma/ppc4xx/adma.c:4100:31: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct xor_regs [noderef] __iomem *xor_reg @@ got void *regs @@
drivers/dma/ppc4xx/adma.c:4100:31: sparse: expected struct xor_regs [noderef] __iomem *xor_reg
drivers/dma/ppc4xx/adma.c:4100:31: sparse: got void *regs
>> drivers/dma/ppc4xx/adma.c:4107:31: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct dma_regs [noderef] __iomem *dma_reg @@ got void *regs @@
drivers/dma/ppc4xx/adma.c:4107:31: sparse: expected struct dma_regs [noderef] __iomem *dma_reg
drivers/dma/ppc4xx/adma.c:4107:31: sparse: got void *regs

vim +4100 drivers/dma/ppc4xx/adma.c

12458ea06efd7b Anatolij Gustschin 2009-12-11 4001
12458ea06efd7b Anatolij Gustschin 2009-12-11 4002 /**
12458ea06efd7b Anatolij Gustschin 2009-12-11 4003 * ppc440spe_adma_probe - probe the asynch device
12458ea06efd7b Anatolij Gustschin 2009-12-11 4004 */
463a1f8b3ceebe Bill Pemberton 2012-11-19 4005 static int ppc440spe_adma_probe(struct platform_device *ofdev)
12458ea06efd7b Anatolij Gustschin 2009-12-11 4006 {
05c02542c20aa0 Anatolij Gustschin 2010-06-03 4007 struct device_node *np = ofdev->dev.of_node;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4008 struct resource res;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4009 struct ppc440spe_adma_device *adev;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4010 struct ppc440spe_adma_chan *chan;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4011 struct ppc_dma_chan_ref *ref, *_ref;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4012 int ret = 0, initcode = PPC_ADMA_INIT_OK;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4013 const u32 *idx;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4014 int len;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4015 void *regs;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4016 u32 id, pool_size;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4017
12458ea06efd7b Anatolij Gustschin 2009-12-11 4018 if (of_device_is_compatible(np, "amcc,xor-accelerator")) {
12458ea06efd7b Anatolij Gustschin 2009-12-11 4019 id = PPC440SPE_XOR_ID;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4020 /* As far as the XOR engine is concerned, it does not
12458ea06efd7b Anatolij Gustschin 2009-12-11 4021 * use FIFOs but uses linked list. So there is no dependency
12458ea06efd7b Anatolij Gustschin 2009-12-11 4022 * between pool size to allocate and the engine configuration.
12458ea06efd7b Anatolij Gustschin 2009-12-11 4023 */
12458ea06efd7b Anatolij Gustschin 2009-12-11 4024 pool_size = PAGE_SIZE << 1;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4025 } else {
12458ea06efd7b Anatolij Gustschin 2009-12-11 4026 /* it is DMA0 or DMA1 */
12458ea06efd7b Anatolij Gustschin 2009-12-11 4027 idx = of_get_property(np, "cell-index", &len);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4028 if (!idx || (len != sizeof(u32))) {
c6c93048baff25 Rob Herring 2017-07-18 4029 dev_err(&ofdev->dev, "Device node %pOF has missing "
12458ea06efd7b Anatolij Gustschin 2009-12-11 4030 "or invalid cell-index property\n",
c6c93048baff25 Rob Herring 2017-07-18 4031 np);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4032 return -EINVAL;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4033 }
12458ea06efd7b Anatolij Gustschin 2009-12-11 4034 id = *idx;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4035 /* DMA0,1 engines use FIFO to maintain CDBs, so we
12458ea06efd7b Anatolij Gustschin 2009-12-11 4036 * should allocate the pool accordingly to size of this
12458ea06efd7b Anatolij Gustschin 2009-12-11 4037 * FIFO. Thus, the pool size depends on the FIFO depth:
12458ea06efd7b Anatolij Gustschin 2009-12-11 4038 * how much CDBs pointers the FIFO may contain then so
12458ea06efd7b Anatolij Gustschin 2009-12-11 4039 * much CDBs we should provide in the pool.
12458ea06efd7b Anatolij Gustschin 2009-12-11 4040 * That is
12458ea06efd7b Anatolij Gustschin 2009-12-11 4041 * CDB size = 32B;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4042 * CDBs number = (DMA0_FIFO_SIZE >> 3);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4043 * Pool size = CDBs number * CDB size =
12458ea06efd7b Anatolij Gustschin 2009-12-11 4044 * = (DMA0_FIFO_SIZE >> 3) << 5 = DMA0_FIFO_SIZE << 2.
12458ea06efd7b Anatolij Gustschin 2009-12-11 4045 */
12458ea06efd7b Anatolij Gustschin 2009-12-11 4046 pool_size = (id == PPC440SPE_DMA0_ID) ?
12458ea06efd7b Anatolij Gustschin 2009-12-11 4047 DMA0_FIFO_SIZE : DMA1_FIFO_SIZE;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4048 pool_size <<= 2;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4049 }
12458ea06efd7b Anatolij Gustschin 2009-12-11 4050
12458ea06efd7b Anatolij Gustschin 2009-12-11 4051 if (of_address_to_resource(np, 0, &res)) {
12458ea06efd7b Anatolij Gustschin 2009-12-11 4052 dev_err(&ofdev->dev, "failed to get memory resource\n");
12458ea06efd7b Anatolij Gustschin 2009-12-11 4053 initcode = PPC_ADMA_INIT_MEMRES;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4054 ret = -ENODEV;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4055 goto out;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4056 }
12458ea06efd7b Anatolij Gustschin 2009-12-11 4057
12458ea06efd7b Anatolij Gustschin 2009-12-11 4058 if (!request_mem_region(res.start, resource_size(&res),
12458ea06efd7b Anatolij Gustschin 2009-12-11 4059 dev_driver_string(&ofdev->dev))) {
a584bff5efae8c Joe Perches 2010-11-12 4060 dev_err(&ofdev->dev, "failed to request memory region %pR\n",
a584bff5efae8c Joe Perches 2010-11-12 4061 &res);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4062 initcode = PPC_ADMA_INIT_MEMREG;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4063 ret = -EBUSY;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4064 goto out;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4065 }
12458ea06efd7b Anatolij Gustschin 2009-12-11 4066
12458ea06efd7b Anatolij Gustschin 2009-12-11 4067 /* create a device */
12458ea06efd7b Anatolij Gustschin 2009-12-11 4068 adev = kzalloc(sizeof(*adev), GFP_KERNEL);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4069 if (!adev) {
12458ea06efd7b Anatolij Gustschin 2009-12-11 4070 initcode = PPC_ADMA_INIT_ALLOC;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4071 ret = -ENOMEM;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4072 goto err_adev_alloc;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4073 }
12458ea06efd7b Anatolij Gustschin 2009-12-11 4074
12458ea06efd7b Anatolij Gustschin 2009-12-11 4075 adev->id = id;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4076 adev->pool_size = pool_size;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4077 /* allocate coherent memory for hardware descriptors */
12458ea06efd7b Anatolij Gustschin 2009-12-11 4078 adev->dma_desc_pool_virt = dma_alloc_coherent(&ofdev->dev,
12458ea06efd7b Anatolij Gustschin 2009-12-11 4079 adev->pool_size, &adev->dma_desc_pool,
12458ea06efd7b Anatolij Gustschin 2009-12-11 4080 GFP_KERNEL);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4081 if (adev->dma_desc_pool_virt == NULL) {
12458ea06efd7b Anatolij Gustschin 2009-12-11 4082 dev_err(&ofdev->dev, "failed to allocate %d bytes of coherent "
12458ea06efd7b Anatolij Gustschin 2009-12-11 4083 "memory for hardware descriptors\n",
12458ea06efd7b Anatolij Gustschin 2009-12-11 4084 adev->pool_size);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4085 initcode = PPC_ADMA_INIT_COHERENT;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4086 ret = -ENOMEM;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4087 goto err_dma_alloc;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4088 }
d73111c6d43f08 Masanari Iida 2012-08-04 4089 dev_dbg(&ofdev->dev, "allocated descriptor pool virt 0x%p phys 0x%llx\n",
12458ea06efd7b Anatolij Gustschin 2009-12-11 4090 adev->dma_desc_pool_virt, (u64)adev->dma_desc_pool);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4091
12458ea06efd7b Anatolij Gustschin 2009-12-11 4092 regs = ioremap(res.start, resource_size(&res));
12458ea06efd7b Anatolij Gustschin 2009-12-11 4093 if (!regs) {
12458ea06efd7b Anatolij Gustschin 2009-12-11 4094 dev_err(&ofdev->dev, "failed to ioremap regs!\n");
f3b77727e82722 Julia Lawall 2013-12-29 4095 ret = -ENOMEM;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4096 goto err_regs_alloc;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4097 }
12458ea06efd7b Anatolij Gustschin 2009-12-11 4098
12458ea06efd7b Anatolij Gustschin 2009-12-11 4099 if (adev->id == PPC440SPE_XOR_ID) {
12458ea06efd7b Anatolij Gustschin 2009-12-11 @4100 adev->xor_reg = regs;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4101 /* Reset XOR */
12458ea06efd7b Anatolij Gustschin 2009-12-11 4102 iowrite32be(XOR_CRSR_XASR_BIT, &adev->xor_reg->crsr);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4103 iowrite32be(XOR_CRSR_64BA_BIT, &adev->xor_reg->crrr);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4104 } else {
12458ea06efd7b Anatolij Gustschin 2009-12-11 4105 size_t fifo_size = (adev->id == PPC440SPE_DMA0_ID) ?
12458ea06efd7b Anatolij Gustschin 2009-12-11 4106 DMA0_FIFO_SIZE : DMA1_FIFO_SIZE;
12458ea06efd7b Anatolij Gustschin 2009-12-11 @4107 adev->dma_reg = regs;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4108 /* DMAx_FIFO_SIZE is defined in bytes,
12458ea06efd7b Anatolij Gustschin 2009-12-11 4109 * <fsiz> - is defined in number of CDB pointers (8byte).
12458ea06efd7b Anatolij Gustschin 2009-12-11 4110 * DMA FIFO Length = CSlength + CPlength, where
12458ea06efd7b Anatolij Gustschin 2009-12-11 4111 * CSlength = CPlength = (fsiz + 1) * 8.
12458ea06efd7b Anatolij Gustschin 2009-12-11 4112 */
12458ea06efd7b Anatolij Gustschin 2009-12-11 4113 iowrite32(DMA_FIFO_ENABLE | ((fifo_size >> 3) - 2),
12458ea06efd7b Anatolij Gustschin 2009-12-11 4114 &adev->dma_reg->fsiz);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4115 /* Configure DMA engine */
12458ea06efd7b Anatolij Gustschin 2009-12-11 4116 iowrite32(DMA_CFG_DXEPR_HP | DMA_CFG_DFMPP_HP | DMA_CFG_FALGN,
12458ea06efd7b Anatolij Gustschin 2009-12-11 4117 &adev->dma_reg->cfg);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4118 /* Clear Status */
12458ea06efd7b Anatolij Gustschin 2009-12-11 4119 iowrite32(~0, &adev->dma_reg->dsts);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4120 }
12458ea06efd7b Anatolij Gustschin 2009-12-11 4121
12458ea06efd7b Anatolij Gustschin 2009-12-11 4122 adev->dev = &ofdev->dev;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4123 adev->common.dev = &ofdev->dev;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4124 INIT_LIST_HEAD(&adev->common.channels);
dd3daca162f741 Jingoo Han 2013-05-24 4125 platform_set_drvdata(ofdev, adev);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4126
12458ea06efd7b Anatolij Gustschin 2009-12-11 4127 /* create a channel */
12458ea06efd7b Anatolij Gustschin 2009-12-11 4128 chan = kzalloc(sizeof(*chan), GFP_KERNEL);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4129 if (!chan) {
12458ea06efd7b Anatolij Gustschin 2009-12-11 4130 initcode = PPC_ADMA_INIT_CHANNEL;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4131 ret = -ENOMEM;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4132 goto err_chan_alloc;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4133 }
12458ea06efd7b Anatolij Gustschin 2009-12-11 4134
12458ea06efd7b Anatolij Gustschin 2009-12-11 4135 spin_lock_init(&chan->lock);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4136 INIT_LIST_HEAD(&chan->chain);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4137 INIT_LIST_HEAD(&chan->all_slots);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4138 chan->device = adev;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4139 chan->common.device = &adev->common;
8ac695463f37af Russell King - ARM Linux 2012-03-06 4140 dma_cookie_init(&chan->common);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4141 list_add_tail(&chan->common.device_node, &adev->common.channels);
7f8281765f9949 Allen Pais 2020-08-31 4142 tasklet_setup(&chan->irq_tasklet, ppc440spe_adma_tasklet);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4143
12458ea06efd7b Anatolij Gustschin 2009-12-11 4144 /* allocate and map helper pages for async validation or
12458ea06efd7b Anatolij Gustschin 2009-12-11 4145 * async_mult/async_sum_product operations on DMA0/1.
12458ea06efd7b Anatolij Gustschin 2009-12-11 4146 */
12458ea06efd7b Anatolij Gustschin 2009-12-11 4147 if (adev->id != PPC440SPE_XOR_ID) {
12458ea06efd7b Anatolij Gustschin 2009-12-11 4148 chan->pdest_page = alloc_page(GFP_KERNEL);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4149 chan->qdest_page = alloc_page(GFP_KERNEL);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4150 if (!chan->pdest_page ||
12458ea06efd7b Anatolij Gustschin 2009-12-11 4151 !chan->qdest_page) {
12458ea06efd7b Anatolij Gustschin 2009-12-11 4152 if (chan->pdest_page)
12458ea06efd7b Anatolij Gustschin 2009-12-11 4153 __free_page(chan->pdest_page);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4154 if (chan->qdest_page)
12458ea06efd7b Anatolij Gustschin 2009-12-11 4155 __free_page(chan->qdest_page);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4156 ret = -ENOMEM;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4157 goto err_page_alloc;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4158 }
12458ea06efd7b Anatolij Gustschin 2009-12-11 4159 chan->pdest = dma_map_page(&ofdev->dev, chan->pdest_page, 0,
12458ea06efd7b Anatolij Gustschin 2009-12-11 4160 PAGE_SIZE, DMA_BIDIRECTIONAL);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4161 chan->qdest = dma_map_page(&ofdev->dev, chan->qdest_page, 0,
12458ea06efd7b Anatolij Gustschin 2009-12-11 4162 PAGE_SIZE, DMA_BIDIRECTIONAL);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4163 }
12458ea06efd7b Anatolij Gustschin 2009-12-11 4164
12458ea06efd7b Anatolij Gustschin 2009-12-11 4165 ref = kmalloc(sizeof(*ref), GFP_KERNEL);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4166 if (ref) {
12458ea06efd7b Anatolij Gustschin 2009-12-11 4167 ref->chan = &chan->common;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4168 INIT_LIST_HEAD(&ref->node);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4169 list_add_tail(&ref->node, &ppc440spe_adma_chan_list);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4170 } else {
12458ea06efd7b Anatolij Gustschin 2009-12-11 4171 dev_err(&ofdev->dev, "failed to allocate channel reference!\n");
12458ea06efd7b Anatolij Gustschin 2009-12-11 4172 ret = -ENOMEM;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4173 goto err_ref_alloc;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4174 }
12458ea06efd7b Anatolij Gustschin 2009-12-11 4175
12458ea06efd7b Anatolij Gustschin 2009-12-11 4176 ret = ppc440spe_adma_setup_irqs(adev, chan, &initcode);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4177 if (ret)
12458ea06efd7b Anatolij Gustschin 2009-12-11 4178 goto err_irq;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4179
12458ea06efd7b Anatolij Gustschin 2009-12-11 4180 ppc440spe_adma_init_capabilities(adev);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4181
12458ea06efd7b Anatolij Gustschin 2009-12-11 4182 ret = dma_async_device_register(&adev->common);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4183 if (ret) {
12458ea06efd7b Anatolij Gustschin 2009-12-11 4184 initcode = PPC_ADMA_INIT_REGISTER;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4185 dev_err(&ofdev->dev, "failed to register dma device\n");
12458ea06efd7b Anatolij Gustschin 2009-12-11 4186 goto err_dev_reg;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4187 }
12458ea06efd7b Anatolij Gustschin 2009-12-11 4188
12458ea06efd7b Anatolij Gustschin 2009-12-11 4189 goto out;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4190
12458ea06efd7b Anatolij Gustschin 2009-12-11 4191 err_dev_reg:
12458ea06efd7b Anatolij Gustschin 2009-12-11 4192 ppc440spe_adma_release_irqs(adev, chan);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4193 err_irq:
12458ea06efd7b Anatolij Gustschin 2009-12-11 4194 list_for_each_entry_safe(ref, _ref, &ppc440spe_adma_chan_list, node) {
12458ea06efd7b Anatolij Gustschin 2009-12-11 4195 if (chan == to_ppc440spe_adma_chan(ref->chan)) {
12458ea06efd7b Anatolij Gustschin 2009-12-11 4196 list_del(&ref->node);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4197 kfree(ref);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4198 }
12458ea06efd7b Anatolij Gustschin 2009-12-11 4199 }
12458ea06efd7b Anatolij Gustschin 2009-12-11 4200 err_ref_alloc:
12458ea06efd7b Anatolij Gustschin 2009-12-11 4201 if (adev->id != PPC440SPE_XOR_ID) {
12458ea06efd7b Anatolij Gustschin 2009-12-11 4202 dma_unmap_page(&ofdev->dev, chan->pdest,
12458ea06efd7b Anatolij Gustschin 2009-12-11 4203 PAGE_SIZE, DMA_BIDIRECTIONAL);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4204 dma_unmap_page(&ofdev->dev, chan->qdest,
12458ea06efd7b Anatolij Gustschin 2009-12-11 4205 PAGE_SIZE, DMA_BIDIRECTIONAL);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4206 __free_page(chan->pdest_page);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4207 __free_page(chan->qdest_page);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4208 }
12458ea06efd7b Anatolij Gustschin 2009-12-11 4209 err_page_alloc:
12458ea06efd7b Anatolij Gustschin 2009-12-11 4210 kfree(chan);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4211 err_chan_alloc:
12458ea06efd7b Anatolij Gustschin 2009-12-11 4212 if (adev->id == PPC440SPE_XOR_ID)
12458ea06efd7b Anatolij Gustschin 2009-12-11 4213 iounmap(adev->xor_reg);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4214 else
12458ea06efd7b Anatolij Gustschin 2009-12-11 4215 iounmap(adev->dma_reg);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4216 err_regs_alloc:
12458ea06efd7b Anatolij Gustschin 2009-12-11 4217 dma_free_coherent(adev->dev, adev->pool_size,
12458ea06efd7b Anatolij Gustschin 2009-12-11 4218 adev->dma_desc_pool_virt,
12458ea06efd7b Anatolij Gustschin 2009-12-11 4219 adev->dma_desc_pool);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4220 err_dma_alloc:
12458ea06efd7b Anatolij Gustschin 2009-12-11 4221 kfree(adev);
12458ea06efd7b Anatolij Gustschin 2009-12-11 4222 err_adev_alloc:
12458ea06efd7b Anatolij Gustschin 2009-12-11 4223 release_mem_region(res.start, resource_size(&res));
12458ea06efd7b Anatolij Gustschin 2009-12-11 4224 out:
12458ea06efd7b Anatolij Gustschin 2009-12-11 4225 if (id < PPC440SPE_ADMA_ENGINES_NUM)
12458ea06efd7b Anatolij Gustschin 2009-12-11 4226 ppc440spe_adma_devices[id] = initcode;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4227
12458ea06efd7b Anatolij Gustschin 2009-12-11 4228 return ret;
12458ea06efd7b Anatolij Gustschin 2009-12-11 4229 }
12458ea06efd7b Anatolij Gustschin 2009-12-11 4230

:::::: The code at line 4100 was first introduced by commit
:::::: 12458ea06efd7b44281e68fe59c950ec7d59c649 ppc440spe-adma: adds updated ppc440spe adma driver

:::::: TO: Anatolij Gustschin <agust@xxxxxxx>
:::::: CC: Dan Williams <dan.j.williams@xxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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