[PATCH v4 06/10] nvmet: add copy command support for bdev and file ns

Thu Apr 28 07:53:21 PDT 2022

Hi Nitesh,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on next-20220422]
[cannot apply to axboe-block/for-next device-mapper-dm/for-next linus/master v5.18-rc4 v5.18-rc3 v5.18-rc2 v5.18-rc4]
[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]

url:    https://github.com/intel-lab-lkp/linux/commits/Nitesh-Shetty/block-Introduce-queue-limits-for-copy-offload-support/20220426-201825
base:    e7d6987e09a328d4a949701db40ef63fbb970670
config: s390-randconfig-s032-20220427 (https://download.01.org/0day-ci/archive/20220428/202204282248.B5VfX8LS-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 11.3.0
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: v0.6.4-dirty
        # https://github.com/intel-lab-lkp/linux/commit/6a9ea8570c34a7222786ca4d129578f48426d2f2
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Nitesh-Shetty/block-Introduce-queue-limits-for-copy-offload-support/20220426-201825
        git checkout 6a9ea8570c34a7222786ca4d129578f48426d2f2
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=s390 SHELL=/bin/bash drivers/md/ drivers/nvme/target/

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

sparse warnings: (new ones prefixed by >>)
>> drivers/nvme/target/io-cmd-bdev.c:56:26: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned char [usertype] msrc @@     got restricted __le16 @@
   drivers/nvme/target/io-cmd-bdev.c:56:26: sparse:     expected unsigned char [usertype] msrc
   drivers/nvme/target/io-cmd-bdev.c:56:26: sparse:     got restricted __le16
   drivers/nvme/target/io-cmd-bdev.c:59:34: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned char [usertype] msrc @@     got restricted __le16 @@
   drivers/nvme/target/io-cmd-bdev.c:59:34: sparse:     expected unsigned char [usertype] msrc
   drivers/nvme/target/io-cmd-bdev.c:59:34: sparse:     got restricted __le16
--
>> drivers/nvme/target/admin-cmd.c:537:26: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned char [usertype] msrc @@     got restricted __le16 @@
   drivers/nvme/target/admin-cmd.c:537:26: sparse:     expected unsigned char [usertype] msrc
   drivers/nvme/target/admin-cmd.c:537:26: sparse:     got restricted __le16

vim +56 drivers/nvme/target/io-cmd-bdev.c

    12	
    13	void nvmet_bdev_set_limits(struct block_device *bdev, struct nvme_id_ns *id)
    14	{
    15		const struct queue_limits *ql = &bdev_get_queue(bdev)->limits;
    16		/* Number of logical blocks per physical block. */
    17		const u32 lpp = ql->physical_block_size / ql->logical_block_size;
    18		/* Logical blocks per physical block, 0's based. */
    19		const __le16 lpp0b = to0based(lpp);
    20	
    21		/*
    22		 * For NVMe 1.2 and later, bit 1 indicates that the fields NAWUN,
    23		 * NAWUPF, and NACWU are defined for this namespace and should be
    24		 * used by the host for this namespace instead of the AWUN, AWUPF,
    25		 * and ACWU fields in the Identify Controller data structure. If
    26		 * any of these fields are zero that means that the corresponding
    27		 * field from the identify controller data structure should be used.
    28		 */
    29		id->nsfeat |= 1 << 1;
    30		id->nawun = lpp0b;
    31		id->nawupf = lpp0b;
    32		id->nacwu = lpp0b;
    33	
    34		/*
    35		 * Bit 4 indicates that the fields NPWG, NPWA, NPDG, NPDA, and
    36		 * NOWS are defined for this namespace and should be used by
    37		 * the host for I/O optimization.
    38		 */
    39		id->nsfeat |= 1 << 4;
    40		/* NPWG = Namespace Preferred Write Granularity. 0's based */
    41		id->npwg = lpp0b;
    42		/* NPWA = Namespace Preferred Write Alignment. 0's based */
    43		id->npwa = id->npwg;
    44		/* NPDG = Namespace Preferred Deallocate Granularity. 0's based */
    45		id->npdg = to0based(ql->discard_granularity / ql->logical_block_size);
    46		/* NPDG = Namespace Preferred Deallocate Alignment */
    47		id->npda = id->npdg;
    48		/* NOWS = Namespace Optimal Write Size */
    49		id->nows = to0based(ql->io_opt / ql->logical_block_size);
    50	
    51		/*Copy limits*/
    52		if (ql->max_copy_sectors) {
    53			id->mcl = cpu_to_le32((ql->max_copy_sectors << 9) / ql->logical_block_size);
    54			id->mssrl = cpu_to_le16((ql->max_copy_range_sectors << 9) /
    55					ql->logical_block_size);
  > 56			id->msrc = to0based(ql->max_copy_nr_ranges);
    57		} else {
    58			if (ql->zoned == BLK_ZONED_NONE) {
    59				id->msrc = to0based(BIO_MAX_VECS);
    60				id->mssrl = cpu_to_le16(
    61						(BIO_MAX_VECS << PAGE_SHIFT) / ql->logical_block_size);
    62				id->mcl = cpu_to_le32(le16_to_cpu(id->mssrl) * BIO_MAX_VECS);
    63	#ifdef CONFIG_BLK_DEV_ZONED
    64			} else {
    65				/* TODO: get right values for zoned device */
    66				id->msrc = to0based(BIO_MAX_VECS);
    67				id->mssrl = cpu_to_le16(min((BIO_MAX_VECS << PAGE_SHIFT),
    68						ql->chunk_sectors) / ql->logical_block_size);
    69				id->mcl = cpu_to_le32(min(le16_to_cpu(id->mssrl) * BIO_MAX_VECS,
    70							ql->chunk_sectors));
    71	#endif
    72			}
    73		}
    74	}
    75	

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