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Message-ID: <202009061641.svGczCRM%lkp@intel.com>
Date:   Sun, 6 Sep 2020 16:28:43 +0800
From:   kernel test robot <lkp@...el.com>
To:     Corentin Labbe <clabbe.montjoie@...il.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Herbert Xu <herbert@...dor.apana.org.au>
Subject: drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c:412:28: sparse:
 sparse: invalid assignment: &=

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   dd9fb9bb3340c791a2be106fdc895db75f177343
commit: d1d787bcebfe122a5bd443ae565696661e2e9656 crypto: sun4i-ss - fix big endian issues
date:   10 months ago
config: arm64-randconfig-s031-20200906 (attached as .config)
compiler: aarch64-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: v0.6.2-191-g10164920-dirty
        git checkout d1d787bcebfe122a5bd443ae565696661e2e9656
        # 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__' ARCH=arm64 

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


sparse warnings: (new ones prefixed by >>)

>> drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c:412:28: sparse: sparse: invalid assignment: &=
>> drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c:412:28: sparse:    left side has type restricted __le32
>> drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c:412:28: sparse:    right side has type unsigned long
   drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c:419:12: sparse: sparse: invalid assignment: |=
   drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c:419:12: sparse:    left side has type restricted __le32
>> drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c:419:12: sparse:    right side has type int
   drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c:482:27: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned int [assigned] [usertype] v @@     got restricted __be32 [usertype] @@
   drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c:482:27: sparse:     expected unsigned int [assigned] [usertype] v
   drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c:482:27: sparse:     got restricted __be32 [usertype]
>> drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c:487:27: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned int [addressable] [assigned] [usertype] v @@     got restricted __le32 [usertype] @@
>> drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c:487:27: sparse:     expected unsigned int [addressable] [assigned] [usertype] v
>> drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c:487:27: sparse:     got restricted __le32 [usertype]

# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1d787bcebfe122a5bd443ae565696661e2e9656
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout d1d787bcebfe122a5bd443ae565696661e2e9656
vim +412 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c

477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  148  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  149  /*
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  150   * sun4i_hash_update: update hash engine
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  151   *
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  152   * Could be used for both SHA1 and MD5
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  153   * Write data by step of 32bits and put then in the SS.
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  154   *
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  155   * Since we cannot leave partial data and hash state in the engine,
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  156   * we need to get the hash state at the end of this function.
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  157   * We can get the hash state every 64 bytes
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  158   *
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  159   * So the first work is to get the number of bytes to write to SS modulo 64
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  160   * The extra bytes will go to a temporary buffer op->buf storing op->len bytes
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  161   *
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  162   * So at the begin of update()
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  163   * if op->len + areq->nbytes < 64
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  164   * => all data will be written to wait buffer (op->buf) and end=0
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  165   * if not, write all data from op->buf to the device and position end to
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  166   * complete to 64bytes
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  167   *
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  168   * example 1:
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  169   * update1 60o => op->len=60
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  170   * update2 60o => need one more word to have 64 bytes
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  171   * end=4
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  172   * so write all data from op->buf and one word of SGs
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  173   * write remaining data in op->buf
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  174   * final state op->len=56
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  175   */
8d46a5c872946a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Baoyou Xie     2016-09-18  176  static int sun4i_hash(struct ahash_request *areq)
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  177  {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  178  	/*
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  179  	 * i is the total bytes read from SGs, to be compared to areq->nbytes
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  180  	 * i is important because we cannot rely on SG length since the sum of
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  181  	 * SG->length could be greater than areq->nbytes
e3f9490e89c224 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  182  	 *
e3f9490e89c224 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  183  	 * end is the position when we need to stop writing to the device,
e3f9490e89c224 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  184  	 * to be compared to i
e3f9490e89c224 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  185  	 *
e3f9490e89c224 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  186  	 * in_i: advancement in the current SG
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  187  	 */
214a9bd0f8dec4 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  188  	unsigned int i = 0, end, fill, min_fill, nwait, nbw = 0, j = 0, todo;
e3f9490e89c224 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  189  	unsigned int in_i = 0;
d1d787bcebfe12 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  190  	u32 spaces, rx_cnt = SS_RX_DEFAULT, bf[32] = {0}, v, ivmode = 0;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  191  	struct sun4i_req_ctx *op = ahash_request_ctx(areq);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  192  	struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
9b17e5ad7831cd drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  193  	struct sun4i_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm);
9b17e5ad7831cd drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  194  	struct sun4i_ss_ctx *ss = tfmctx->ss;
e3f9490e89c224 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  195  	struct scatterlist *in_sg = areq->src;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  196  	struct sg_mapping_iter mi;
214a9bd0f8dec4 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  197  	int in_r, err = 0;
e3f9490e89c224 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  198  	size_t copied = 0;
d1d787bcebfe12 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  199  	__le32 wb = 0;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  200  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  201  	dev_dbg(ss->dev, "%s %s bc=%llu len=%u mode=%x wl=%u h0=%0x",
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  202  		__func__, crypto_tfm_alg_name(areq->base.tfm),
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  203  		op->byte_count, areq->nbytes, op->mode,
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  204  		op->len, op->hash[0]);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  205  
a595e60a70c0d0 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  206  	if (unlikely(!areq->nbytes) && !(op->flags & SS_HASH_FINAL))
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  207  		return 0;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  208  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  209  	/* protect against overflow */
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  210  	if (unlikely(areq->nbytes > UINT_MAX - op->len)) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  211  		dev_err(ss->dev, "Cannot process too large request\n");
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  212  		return -EINVAL;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  213  	}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  214  
a595e60a70c0d0 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  215  	if (op->len + areq->nbytes < 64 && !(op->flags & SS_HASH_FINAL)) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  216  		/* linearize data to op->buf */
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  217  		copied = sg_pcopy_to_buffer(areq->src, sg_nents(areq->src),
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  218  					    op->buf + op->len, areq->nbytes, 0);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  219  		op->len += copied;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  220  		return 0;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  221  	}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  222  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  223  	spin_lock_bh(&ss->slock);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  224  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  225  	/*
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  226  	 * if some data have been processed before,
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  227  	 * we need to restore the partial hash state
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  228  	 */
a595e60a70c0d0 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  229  	if (op->byte_count) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  230  		ivmode = SS_IV_ARBITRARY;
626abd3125e02d drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  231  		for (i = 0; i < crypto_ahash_digestsize(tfm) / 4; i++)
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  232  			writel(op->hash[i], ss->base + SS_IV0 + i * 4);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  233  	}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  234  	/* Enable the device */
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  235  	writel(op->mode | SS_ENABLED | ivmode, ss->base + SS_CTL);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  236  
a595e60a70c0d0 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  237  	if (!(op->flags & SS_HASH_UPDATE))
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  238  		goto hash_final;
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  239  
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  240  	/* start of handling data */
a595e60a70c0d0 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  241  	if (!(op->flags & SS_HASH_FINAL)) {
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  242  		end = ((areq->nbytes + op->len) / 64) * 64 - op->len;
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  243  
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  244  		if (end > areq->nbytes || areq->nbytes - end > 63) {
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  245  			dev_err(ss->dev, "ERROR: Bound error %u %u\n",
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  246  				end, areq->nbytes);
b46b9d1aadf7f3 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Wei Yongjun    2016-08-20  247  			err = -EINVAL;
b46b9d1aadf7f3 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Wei Yongjun    2016-08-20  248  			goto release_ss;
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  249  		}
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  250  	} else {
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  251  		/* Since we have the flag final, we can go up to modulo 4 */
f87391558acf81 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin Labbe 2019-04-18  252  		if (areq->nbytes < 4)
f87391558acf81 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin Labbe 2019-04-18  253  			end = 0;
f87391558acf81 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin Labbe 2019-04-18  254  		else
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  255  			end = ((areq->nbytes + op->len) / 4) * 4 - op->len;
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  256  	}
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  257  
a595e60a70c0d0 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  258  	/* TODO if SGlen % 4 and !op->len then DMA */
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  259  	i = 1;
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  260  	while (in_sg && i == 1) {
a595e60a70c0d0 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  261  		if (in_sg->length % 4)
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  262  			i = 0;
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  263  		in_sg = sg_next(in_sg);
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  264  	}
0f52ddaed6500d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  265  	if (i == 1 && !op->len && areq->nbytes)
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  266  		dev_dbg(ss->dev, "We can DMA\n");
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  267  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  268  	i = 0;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  269  	sg_miter_start(&mi, areq->src, sg_nents(areq->src),
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  270  		       SG_MITER_FROM_SG | SG_MITER_ATOMIC);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  271  	sg_miter_next(&mi);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  272  	in_i = 0;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  273  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  274  	do {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  275  		/*
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  276  		 * we need to linearize in two case:
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  277  		 * - the buffer is already used
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  278  		 * - the SG does not have enough byte remaining ( < 4)
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  279  		 */
a595e60a70c0d0 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  280  		if (op->len || (mi.length - in_i) < 4) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  281  			/*
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  282  			 * if we have entered here we have two reason to stop
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  283  			 * - the buffer is full
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  284  			 * - reach the end
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  285  			 */
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  286  			while (op->len < 64 && i < end) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  287  				/* how many bytes we can read from current SG */
a7126603d46fe8 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  288  				in_r = min(end - i, 64 - op->len);
a7126603d46fe8 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  289  				in_r = min_t(size_t, mi.length - in_i, in_r);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  290  				memcpy(op->buf + op->len, mi.addr + in_i, in_r);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  291  				op->len += in_r;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  292  				i += in_r;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  293  				in_i += in_r;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  294  				if (in_i == mi.length) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  295  					sg_miter_next(&mi);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  296  					in_i = 0;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  297  				}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  298  			}
a595e60a70c0d0 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  299  			if (op->len > 3 && !(op->len % 4)) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  300  				/* write buf to the device */
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  301  				writesl(ss->base + SS_RXFIFO, op->buf,
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  302  					op->len / 4);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  303  				op->byte_count += op->len;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  304  				op->len = 0;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  305  			}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  306  		}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  307  		if (mi.length - in_i > 3 && i < end) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  308  			/* how many bytes we can read from current SG */
a7126603d46fe8 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  309  			in_r = min_t(size_t, mi.length - in_i, areq->nbytes - i);
a7126603d46fe8 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  310  			in_r = min_t(size_t, ((mi.length - in_i) / 4) * 4, in_r);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  311  			/* how many bytes we can write in the device*/
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  312  			todo = min3((u32)(end - i) / 4, rx_cnt, (u32)in_r / 4);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  313  			writesl(ss->base + SS_RXFIFO, mi.addr + in_i, todo);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  314  			op->byte_count += todo * 4;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  315  			i += todo * 4;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  316  			in_i += todo * 4;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  317  			rx_cnt -= todo;
a595e60a70c0d0 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  318  			if (!rx_cnt) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  319  				spaces = readl(ss->base + SS_FCSR);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  320  				rx_cnt = SS_RXFIFO_SPACES(spaces);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  321  			}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  322  			if (in_i == mi.length) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  323  				sg_miter_next(&mi);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  324  				in_i = 0;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  325  			}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  326  		}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  327  	} while (i < end);
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  328  
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  329  	/*
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  330  	 * Now we have written to the device all that we can,
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  331  	 * store the remaining bytes in op->buf
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  332  	 */
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  333  	if ((areq->nbytes - i) < 64) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  334  		while (i < areq->nbytes && in_i < mi.length && op->len < 64) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  335  			/* how many bytes we can read from current SG */
a7126603d46fe8 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  336  			in_r = min(areq->nbytes - i, 64 - op->len);
a7126603d46fe8 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  337  			in_r = min_t(size_t, mi.length - in_i, in_r);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  338  			memcpy(op->buf + op->len, mi.addr + in_i, in_r);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  339  			op->len += in_r;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  340  			i += in_r;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  341  			in_i += in_r;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  342  			if (in_i == mi.length) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  343  				sg_miter_next(&mi);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  344  				in_i = 0;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  345  			}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  346  		}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  347  	}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  348  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  349  	sg_miter_stop(&mi);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  350  
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  351  	/*
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  352  	 * End of data process
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  353  	 * Now if we have the flag final go to finalize part
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  354  	 * If not, store the partial hash
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  355  	 */
a595e60a70c0d0 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  356  	if (op->flags & SS_HASH_FINAL)
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  357  		goto hash_final;
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  358  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  359  	writel(op->mode | SS_ENABLED | SS_DATA_END, ss->base + SS_CTL);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  360  	i = 0;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  361  	do {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  362  		v = readl(ss->base + SS_CTL);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  363  		i++;
a595e60a70c0d0 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  364  	} while (i < SS_TIMEOUT && (v & SS_DATA_END));
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  365  	if (unlikely(i >= SS_TIMEOUT)) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  366  		dev_err_ratelimited(ss->dev,
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  367  				    "ERROR: hash end timeout %d>%d ctl=%x len=%u\n",
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  368  				    i, SS_TIMEOUT, v, areq->nbytes);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  369  		err = -EIO;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  370  		goto release_ss;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  371  	}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  372  
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  373  	/*
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  374  	 * The datasheet isn't very clear about when to retrieve the digest. The
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  375  	 * bit SS_DATA_END is cleared when the engine has processed the data and
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  376  	 * when the digest is computed *but* it doesn't mean the digest is
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  377  	 * available in the digest registers. Hence the delay to be sure we can
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  378  	 * read it.
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  379  	 */
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  380  	ndelay(1);
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  381  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  382  	for (i = 0; i < crypto_ahash_digestsize(tfm) / 4; i++)
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  383  		op->hash[i] = readl(ss->base + SS_MD0 + i * 4);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  384  
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  385  	goto release_ss;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  386  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  387  /*
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  388   * hash_final: finalize hashing operation
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  389   *
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  390   * If we have some remaining bytes, we write them.
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  391   * Then ask the SS for finalizing the hashing operation
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  392   *
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  393   * I do not check RX FIFO size in this function since the size is 32
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  394   * after each enabling and this function neither write more than 32 words.
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  395   * If we come from the update part, we cannot have more than
933e7e3ab239fe drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  396   * 3 remaining bytes to write and SS is fast enough to not care about it.
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  397   */
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  398  
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  399  hash_final:
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  400  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  401  	/* write the remaining words of the wait buffer */
a595e60a70c0d0 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  402  	if (op->len) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  403  		nwait = op->len / 4;
a595e60a70c0d0 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  404  		if (nwait) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  405  			writesl(ss->base + SS_RXFIFO, op->buf, nwait);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  406  			op->byte_count += 4 * nwait;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  407  		}
d78867a94ea74b drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  408  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  409  		nbw = op->len - 4 * nwait;
d78867a94ea74b drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  410  		if (nbw) {
d1d787bcebfe12 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  411  			wb = cpu_to_le32(*(u32 *)(op->buf + nwait * 4));
d78867a94ea74b drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01 @412  			wb &= GENMASK((nbw * 8) - 1, 0);
214a9bd0f8dec4 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  413  
214a9bd0f8dec4 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  414  			op->byte_count += nbw;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  415  		}
d78867a94ea74b drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  416  	}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  417  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  418  	/* write the remaining bytes of the nbw buffer */
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17 @419  	wb |= ((1 << 7) << (nbw * 8));
d1d787bcebfe12 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  420  	bf[j++] = le32_to_cpu(wb);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  421  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  422  	/*
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  423  	 * number of space to pad to obtain 64o minus 8(size) minus 4 (final 1)
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  424  	 * I take the operations from other MD5/SHA1 implementations
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  425  	 */
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  426  
214a9bd0f8dec4 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  427  	/* last block size */
214a9bd0f8dec4 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  428  	fill = 64 - (op->byte_count % 64);
214a9bd0f8dec4 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  429  	min_fill = 2 * sizeof(u32) + (nbw ? 0 : sizeof(u32));
214a9bd0f8dec4 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  430  
214a9bd0f8dec4 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  431  	/* if we can't fill all data, jump to the next 64 block */
214a9bd0f8dec4 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  432  	if (fill < min_fill)
214a9bd0f8dec4 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  433  		fill += 64;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  434  
214a9bd0f8dec4 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  435  	j += (fill - min_fill) / sizeof(u32);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  436  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  437  	/* write the length of data */
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  438  	if (op->mode == SS_OP_SHA1) {
d1d787bcebfe12 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  439  		__be64 *bits = (__be64 *)&bf[j];
d1d787bcebfe12 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  440  		*bits = cpu_to_be64(op->byte_count << 3);
d1d787bcebfe12 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  441  		j += 2;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  442  	} else {
d1d787bcebfe12 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  443  		__le64 *bits = (__le64 *)&bf[j];
d1d787bcebfe12 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  444  		*bits = cpu_to_le64(op->byte_count << 3);
d1d787bcebfe12 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14  445  		j += 2;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  446  	}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  447  	writesl(ss->base + SS_RXFIFO, bf, j);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  448  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  449  	/* Tell the SS to stop the hashing */
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  450  	writel(op->mode | SS_ENABLED | SS_DATA_END, ss->base + SS_CTL);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  451  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  452  	/*
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  453  	 * Wait for SS to finish the hash.
933e7e3ab239fe drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  454  	 * The timeout could happen only in case of bad overclocking
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  455  	 * or driver bug.
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  456  	 */
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  457  	i = 0;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  458  	do {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  459  		v = readl(ss->base + SS_CTL);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  460  		i++;
a595e60a70c0d0 drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  461  	} while (i < SS_TIMEOUT && (v & SS_DATA_END));
477d9b2e591b8d drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Corentin LABBE 2016-08-10  462  	if (unlikely(i >= SS_TIMEOUT)) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  463  		dev_err_ratelimited(ss->dev,
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  464  				    "ERROR: hash end timeout %d>%d ctl=%x len=%u\n",
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  465  				    i, SS_TIMEOUT, v, areq->nbytes);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  466  		err = -EIO;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  467  		goto release_ss;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  468  	}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  469  
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  470  	/*
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  471  	 * The datasheet isn't very clear about when to retrieve the digest. The
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  472  	 * bit SS_DATA_END is cleared when the engine has processed the data and
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  473  	 * when the digest is computed *but* it doesn't mean the digest is
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  474  	 * available in the digest registers. Hence the delay to be sure we can
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  475  	 * read it.
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  476  	 */
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  477  	ndelay(1);
049655499e2ecc drivers/crypto/sunxi-ss/sun4i-ss-hash.c           Antoine Tenart 2017-06-01  478  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  479  	/* Get the hash from the device */
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  480  	if (op->mode == SS_OP_SHA1) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  481  		for (i = 0; i < 5; i++) {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  482  			v = cpu_to_be32(readl(ss->base + SS_MD0 + i * 4));
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  483  			memcpy(areq->result + i * 4, &v, 4);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  484  		}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  485  	} else {
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  486  		for (i = 0; i < 4; i++) {
d1d787bcebfe12 drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c Corentin Labbe 2019-11-14 @487  			v = cpu_to_le32(readl(ss->base + SS_MD0 + i * 4));
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  488  			memcpy(areq->result + i * 4, &v, 4);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  489  		}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  490  	}
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  491  
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  492  release_ss:
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  493  	writel(0, ss->base + SS_CTL);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  494  	spin_unlock_bh(&ss->slock);
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  495  	return err;
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  496  }
6298e948215f2a drivers/crypto/sunxi-ss/sun4i-ss-hash.c           LABBE Corentin 2015-07-17  497  

:::::: The code at line 412 was first introduced by commit
:::::: d78867a94ea74b8d2dafdbf370e0707f37a58f4a crypto: sun4i-ss - use GENMASK to generate masks

:::::: TO: Antoine Ténart <antoine.tenart@...e-electrons.com>
:::::: CC: Herbert Xu <herbert@...dor.apana.org.au>

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

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