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path: root/drivers/crypto/omap-sham.c
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Diffstat (limited to 'drivers/crypto/omap-sham.c')
-rw-r--r--drivers/crypto/omap-sham.c78
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;
}
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