target/linux/mxs/patches-4.4/100-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 diff --git a/drivers/crypto/mxs-dcp.c b/drivers/crypto/mxs-dcp.c
  25 index 59ed54e..1e2017f 100644
  26 --- a/drivers/crypto/mxs-dcp.c
  27 +++ b/drivers/crypto/mxs-dcp.c
  28 @@ -775,6 +775,24 @@ static void dcp_sha_cra_exit(struct crypto_tfm *tfm)
  29  {
  30  }
  31
  32 +static int dcp_sha_export(struct ahash_request *req, void *out)
  33 +{
  34 +       struct dcp_sha_req_ctx *rctx = ahash_request_ctx(req);
  35 +
  36 +       memcpy(out, rctx, sizeof(struct dcp_sha_req_ctx));
  37 +
  38 +       return 0;
  39 +}
  40 +
  41 +static int dcp_sha_import(struct ahash_request *req, const void *in)
  42 +{
  43 +       struct dcp_sha_req_ctx *rctx = ahash_request_ctx(req);
  44 +
  45 +       memcpy(rctx, in, sizeof(struct dcp_sha_req_ctx));
  46 +
  47 +       return 0;
  48 +}
  49 +
  50  /* AES 128 ECB and AES 128 CBC */
  51  static struct crypto_alg dcp_aes_algs[] = {
  52         {
  53 @@ -834,8 +852,11 @@ static struct ahash_alg dcp_sha1_alg = {
  54         .final  = dcp_sha_final,
  55         .finup  = dcp_sha_finup,
  56         .digest = dcp_sha_digest,
  57 +       .import = dcp_sha_import,
  58 +       .export = dcp_sha_export,
  59         .halg   = {
  60                 .digestsize     = SHA1_DIGEST_SIZE,
  61 +               .statesize      = sizeof(struct dcp_sha_req_ctx),
  62                 .base           = {
  63                         .cra_name               = "sha1",
  64                         .cra_driver_name        = "sha1-dcp",
  65 @@ -858,8 +879,11 @@ static struct ahash_alg dcp_sha256_alg = {
  66         .final  = dcp_sha_final,
  67         .finup  = dcp_sha_finup,
  68         .digest = dcp_sha_digest,
  69 +       .import = dcp_sha_import,
  70 +       .export = dcp_sha_export,
  71         .halg   = {
  72                 .digestsize     = SHA256_DIGEST_SIZE,
  73 +               .statesize      = sizeof(struct dcp_sha_req_ctx),
  74                 .base           = {
  75                         .cra_name               = "sha256",
  76                         .cra_driver_name        = "sha256-dcp",
  77 --
  78 1.9.1
  79
  80 --