diff options
Diffstat (limited to 'drivers/crypto/omap-sham.c')
| -rw-r--r-- | drivers/crypto/omap-sham.c | 78 |
1 files changed, 34 insertions, 44 deletions
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c index 465cde3..ba8f1ea 100644 --- a/drivers/crypto/omap-sham.c +++ b/drivers/crypto/omap-sham.c @@ -78,7 +78,6 @@ #define FLAGS_SHA1 0x0010 #define FLAGS_DMA_ACTIVE 0x0020 #define FLAGS_OUTPUT_READY 0x0040 -#define FLAGS_CLEAN 0x0080 #define FLAGS_INIT 0x0100 #define FLAGS_CPU 0x0200 #define FLAGS_HMAC 0x0400 @@ -511,26 +510,6 @@ static int omap_sham_update_dma_stop(struct omap_sham_dev *dd) return 0; } -static void omap_sham_cleanup(struct ahash_request *req) -{ - struct omap_sham_reqctx *ctx = ahash_request_ctx(req); - struct omap_sham_dev *dd = ctx->dd; - unsigned long flags; - - spin_lock_irqsave(&dd->lock, flags); - if (ctx->flags & FLAGS_CLEAN) { - spin_unlock_irqrestore(&dd->lock, flags); - return; - } - ctx->flags |= FLAGS_CLEAN; - spin_unlock_irqrestore(&dd->lock, flags); - - if (ctx->digcnt) - omap_sham_copy_ready_hash(req); - - dev_dbg(dd->dev, "digcnt: %d, bufcnt: %d\n", ctx->digcnt, ctx->bufcnt); -} - static int omap_sham_init(struct ahash_request *req) { struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); @@ -618,9 +597,8 @@ static int omap_sham_final_req(struct omap_sham_dev *dd) return err; } -static int omap_sham_finish_req_hmac(struct ahash_request *req) +static int omap_sham_finish_hmac(struct ahash_request *req) { - struct omap_sham_reqctx *ctx = ahash_request_ctx(req); struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm); struct omap_sham_hmac_ctx *bctx = tctx->base; int bs = crypto_shash_blocksize(bctx->shash); @@ -635,7 +613,24 @@ static int omap_sham_finish_req_hmac(struct ahash_request *req) return crypto_shash_init(&desc.shash) ?: crypto_shash_update(&desc.shash, bctx->opad, bs) ?: - crypto_shash_finup(&desc.shash, ctx->digest, ds, ctx->digest); + crypto_shash_finup(&desc.shash, req->result, ds, req->result); +} + +static int omap_sham_finish(struct ahash_request *req) +{ + struct omap_sham_reqctx *ctx = ahash_request_ctx(req); + struct omap_sham_dev *dd = ctx->dd; + int err = 0; + + if (ctx->digcnt) { + omap_sham_copy_ready_hash(req); + if (ctx->flags & FLAGS_HMAC) + err = omap_sham_finish_hmac(req); + } + + dev_dbg(dd->dev, "digcnt: %d, bufcnt: %d\n", ctx->digcnt, ctx->bufcnt); + + return err; } static void omap_sham_finish_req(struct ahash_request *req, int err) @@ -645,15 +640,12 @@ static void omap_sham_finish_req(struct ahash_request *req, int err) if (!err) { omap_sham_copy_hash(ctx->dd->req, 1); - if (ctx->flags & FLAGS_HMAC) - err = omap_sham_finish_req_hmac(req); + if (ctx->flags & FLAGS_FINAL) + err = omap_sham_finish(req); } else { ctx->flags |= FLAGS_ERROR; } - if ((ctx->flags & FLAGS_FINAL) || err) - omap_sham_cleanup(req); - clk_disable(dd->iclk); dd->flags &= ~FLAGS_BUSY; @@ -809,22 +801,21 @@ static int omap_sham_final_shash(struct ahash_request *req) static int omap_sham_final(struct ahash_request *req) { struct omap_sham_reqctx *ctx = ahash_request_ctx(req); - int err = 0; ctx->flags |= FLAGS_FINUP; - if (!(ctx->flags & FLAGS_ERROR)) { - /* OMAP HW accel works only with buffers >= 9 */ - /* HMAC is always >= 9 because of ipad */ - if ((ctx->digcnt + ctx->bufcnt) < 9) - err = omap_sham_final_shash(req); - else if (ctx->bufcnt) - return omap_sham_enqueue(req, OP_FINAL); - } + if (ctx->flags & FLAGS_ERROR) + return 0; /* uncompleted hash is not needed */ - omap_sham_cleanup(req); + /* OMAP HW accel works only with buffers >= 9 */ + /* HMAC is always >= 9 because ipad == block size */ + if ((ctx->digcnt + ctx->bufcnt) < 9) + return omap_sham_final_shash(req); + else if (ctx->bufcnt) + return omap_sham_enqueue(req, OP_FINAL); - return err; + /* copy ready hash (+ finalize hmac) */ + return omap_sham_finish(req); } static int omap_sham_finup(struct ahash_request *req) @@ -835,7 +826,7 @@ static int omap_sham_finup(struct ahash_request *req) ctx->flags |= FLAGS_FINUP; err1 = omap_sham_update(req); - if (err1 == -EINPROGRESS) + if (err1 == -EINPROGRESS || err1 == -EBUSY) return err1; /* * final() has to be always called to cleanup resources @@ -890,8 +881,6 @@ static int omap_sham_cra_init_alg(struct crypto_tfm *tfm, const char *alg_base) struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm); const char *alg_name = crypto_tfm_alg_name(tfm); - pr_info("enter\n"); - /* Allocate a fallback and abort if it failed. */ tctx->fallback = crypto_alloc_shash(alg_name, 0, CRYPTO_ALG_NEED_FALLBACK); @@ -1297,7 +1286,8 @@ static int __init omap_sham_mod_init(void) pr_info("loading %s driver\n", "omap-sham"); if (!cpu_class_is_omap2() || - omap_type() != OMAP2_DEVICE_TYPE_SEC) { + (omap_type() != OMAP2_DEVICE_TYPE_SEC && + omap_type() != OMAP2_DEVICE_TYPE_EMU)) { pr_err("Unsupported cpu\n"); return -ENODEV; } |