target/linux/mxs/patches-4.4/110-crypto-mxsdcp-provide-importexport.patch

   1 From: Fabio Estevam <fabio.estevam@nxp.com>
   2
   3 Currently the mxs-dcp driver fails to probe:
   4
   5 mxs-dcp 80028000.dcp: Failed to register sha1 hash!
   6 mxs-dcp: probe of 80028000.dcp failed with error -22
   7
   8 This happens since commit 8996eafdcbad ("crypto: ahash - ensure statesize
   9 is non-zero"), which requires statesize to be filled.
  10
  11 Other than filling statesize, we also need to provide the import/export
  12 functions.
  13
  14 Based on the implementation of the sahara and caam drivers.
  15
  16 Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
  17 ---
  18 Changes since v2:
  19 - Newly introduced in this series
  20
  21  drivers/crypto/mxs-dcp.c | 24 ++++++++++++++++++++++++
  22  1 file changed, 24 insertions(+)
  23
  24 --- a/drivers/crypto/mxs-dcp.c
  25 +++ b/drivers/crypto/mxs-dcp.c
  26 @@ -775,6 +775,24 @@ static void dcp_sha_cra_exit(struct cryp
  27  {
  28  }
  29
  30 +static int dcp_sha_export(struct ahash_request *req, void *out)
  31 +{
  32 +       struct dcp_sha_req_ctx *rctx = ahash_request_ctx(req);
  33 +
  34 +       memcpy(out, rctx, sizeof(struct dcp_sha_req_ctx));
  35 +
  36 +       return 0;
  37 +}
  38 +
  39 +static int dcp_sha_import(struct ahash_request *req, const void *in)
  40 +{
  41 +       struct dcp_sha_req_ctx *rctx = ahash_request_ctx(req);
  42 +
  43 +       memcpy(rctx, in, sizeof(struct dcp_sha_req_ctx));
  44 +
  45 +       return 0;
  46 +}
  47 +
  48  /* AES 128 ECB and AES 128 CBC */
  49  static struct crypto_alg dcp_aes_algs[] = {
  50         {
  51 @@ -834,8 +852,11 @@ static struct ahash_alg dcp_sha1_alg = {
  52         .final  = dcp_sha_final,
  53         .finup  = dcp_sha_finup,
  54         .digest = dcp_sha_digest,
  55 +       .import = dcp_sha_import,
  56 +       .export = dcp_sha_export,
  57         .halg   = {
  58                 .digestsize     = SHA1_DIGEST_SIZE,
  59 +               .statesize      = sizeof(struct dcp_sha_req_ctx),
  60                 .base           = {
  61                         .cra_name               = "sha1",
  62                         .cra_driver_name        = "sha1-dcp",
  63 @@ -858,8 +879,11 @@ static struct ahash_alg dcp_sha256_alg =
  64         .final  = dcp_sha_final,
  65         .finup  = dcp_sha_finup,
  66         .digest = dcp_sha_digest,
  67 +       .import = dcp_sha_import,
  68 +       .export = dcp_sha_export,
  69         .halg   = {
  70                 .digestsize     = SHA256_DIGEST_SIZE,
  71 +               .statesize      = sizeof(struct dcp_sha_req_ctx),
  72                 .base           = {
  73                         .cra_name               = "sha256",
  74                         .cra_driver_name        = "sha256-dcp",