1 files changed, 186 insertions, 101 deletions
diff --git a/drivers/crypto/tegra/tegra-se-hash.c b/drivers/crypto/tegra/tegra-se-hash.c
index 0b5cdd5676b1..42d007b7af45 100644
--- a/drivers/crypto/tegra/tegra-se-hash.c
+++ b/drivers/crypto/tegra/tegra-se-hash.c
@@ -34,6 +34,7 @@ struct tegra_sha_reqctx {
 	struct tegra_se_datbuf datbuf;
 	struct tegra_se_datbuf residue;
 	struct tegra_se_datbuf digest;
+	struct tegra_se_datbuf intr_res;
 	unsigned int alg;
 	unsigned int config;
 	unsigned int total_len;
@@ -211,9 +212,62 @@ static int tegra_sha_fallback_export(struct ahash_request *req, void *out)
 	return crypto_ahash_export(&rctx->fallback_req, out);
 }
 
-static int tegra_sha_prep_cmd(struct tegra_se *se, u32 *cpuvaddr,
+static int tegra_se_insert_hash_result(struct tegra_sha_ctx *ctx, u32 *cpuvaddr,
+				       struct tegra_sha_reqctx *rctx)
+{
+	__be32 *res_be = (__be32 *)rctx->intr_res.buf;
+	u32 *res = (u32 *)rctx->intr_res.buf;
+	int i = 0, j;
+
+	cpuvaddr[i++] = 0;
+	cpuvaddr[i++] = host1x_opcode_setpayload(HASH_RESULT_REG_COUNT);
+	cpuvaddr[i++] = se_host1x_opcode_incr_w(SE_SHA_HASH_RESULT);
+
+	for (j = 0; j < HASH_RESULT_REG_COUNT; j++) {
+		int idx = j;
+
+		/*
+		 * The initial, intermediate and final hash value of SHA-384, SHA-512
+		 * in SHA_HASH_RESULT registers follow the below layout of bytes.
+		 *
+		 * +---------------+------------+
+		 * | HASH_RESULT_0 | B4...B7    |
+		 * +---------------+------------+
+		 * | HASH_RESULT_1 | B0...B3    |
+		 * +---------------+------------+
+		 * | HASH_RESULT_2 | B12...B15  |
+		 * +---------------+------------+
+		 * | HASH_RESULT_3 | B8...B11   |
+		 * +---------------+------------+
+		 * |            ......          |
+		 * +---------------+------------+
+		 * | HASH_RESULT_14| B60...B63  |
+		 * +---------------+------------+
+		 * | HASH_RESULT_15| B56...B59  |
+		 * +---------------+------------+
+		 *
+		 */
+		if (ctx->alg == SE_ALG_SHA384 || ctx->alg == SE_ALG_SHA512)
+			idx = (j % 2) ? j - 1 : j + 1;
+
+		/* For SHA-1, SHA-224, SHA-256, SHA-384, SHA-512 the initial
+		 * intermediate and final hash value when stored in
+		 * SHA_HASH_RESULT registers, the byte order is NOT in
+		 * little-endian.
+		 */
+		if (ctx->alg <= SE_ALG_SHA512)
+			cpuvaddr[i++] = be32_to_cpu(res_be[idx]);
+		else
+			cpuvaddr[i++] = res[idx];
+	}
+
+	return i;
+}
+
+static int tegra_sha_prep_cmd(struct tegra_sha_ctx *ctx, u32 *cpuvaddr,
 			      struct tegra_sha_reqctx *rctx)
 {
+	struct tegra_se *se = ctx->se;
 	u64 msg_len, msg_left;
 	int i = 0;
 
@@ -241,7 +295,7 @@ static int tegra_sha_prep_cmd(struct tegra_se *se, u32 *cpuvaddr,
 	cpuvaddr[i++] = upper_32_bits(msg_left);
 	cpuvaddr[i++] = 0;
 	cpuvaddr[i++] = 0;
-	cpuvaddr[i++] = host1x_opcode_setpayload(6);
+	cpuvaddr[i++] = host1x_opcode_setpayload(2);
 	cpuvaddr[i++] = se_host1x_opcode_incr_w(SE_SHA_CFG);
 	cpuvaddr[i++] = rctx->config;
 
@@ -249,15 +303,29 @@ static int tegra_sha_prep_cmd(struct tegra_se *se, u32 *cpuvaddr,
 		cpuvaddr[i++] = SE_SHA_TASK_HASH_INIT;
 		rctx->task &= ~SHA_FIRST;
 	} else {
-		cpuvaddr[i++] = 0;
+		/*
+		 * If it isn't the first task, program the HASH_RESULT register
+		 * with the intermediate result from the previous task
+		 */
+		i += tegra_se_insert_hash_result(ctx, cpuvaddr + i, rctx);
 	}
 
+	cpuvaddr[i++] = host1x_opcode_setpayload(4);
+	cpuvaddr[i++] = se_host1x_opcode_incr_w(SE_SHA_IN_ADDR);
 	cpuvaddr[i++] = rctx->datbuf.addr;
 	cpuvaddr[i++] = (u32)(SE_ADDR_HI_MSB(upper_32_bits(rctx->datbuf.addr)) |
 				SE_ADDR_HI_SZ(rctx->datbuf.size));
-	cpuvaddr[i++] = rctx->digest.addr;
-	cpuvaddr[i++] = (u32)(SE_ADDR_HI_MSB(upper_32_bits(rctx->digest.addr)) |
-				SE_ADDR_HI_SZ(rctx->digest.size));
+
+	if (rctx->task & SHA_UPDATE) {
+		cpuvaddr[i++] = rctx->intr_res.addr;
+		cpuvaddr[i++] = (u32)(SE_ADDR_HI_MSB(upper_32_bits(rctx->intr_res.addr)) |
+					SE_ADDR_HI_SZ(rctx->intr_res.size));
+	} else {
+		cpuvaddr[i++] = rctx->digest.addr;
+		cpuvaddr[i++] = (u32)(SE_ADDR_HI_MSB(upper_32_bits(rctx->digest.addr)) |
+					SE_ADDR_HI_SZ(rctx->digest.size));
+	}
+
 	if (rctx->key_id) {
 		cpuvaddr[i++] = host1x_opcode_setpayload(1);
 		cpuvaddr[i++] = se_host1x_opcode_nonincr_w(SE_SHA_CRYPTO_CFG);
@@ -266,42 +334,72 @@ static int tegra_sha_prep_cmd(struct tegra_se *se, u32 *cpuvaddr,
 
 	cpuvaddr[i++] = host1x_opcode_setpayload(1);
 	cpuvaddr[i++] = se_host1x_opcode_nonincr_w(SE_SHA_OPERATION);
-	cpuvaddr[i++] = SE_SHA_OP_WRSTALL |
-			SE_SHA_OP_START |
+	cpuvaddr[i++] = SE_SHA_OP_WRSTALL | SE_SHA_OP_START |
 			SE_SHA_OP_LASTBUF;
 	cpuvaddr[i++] = se_host1x_opcode_nonincr(host1x_uclass_incr_syncpt_r(), 1);
 	cpuvaddr[i++] = host1x_uclass_incr_syncpt_cond_f(1) |
 			host1x_uclass_incr_syncpt_indx_f(se->syncpt_id);
 
-	dev_dbg(se->dev, "msg len %llu msg left %llu cfg %#x",
-		msg_len, msg_left, rctx->config);
+	dev_dbg(se->dev, "msg len %llu msg left %llu sz %zd cfg %#x",
+		msg_len, msg_left, rctx->datbuf.size, rctx->config);
 
 	return i;
 }
 
-static void tegra_sha_copy_hash_result(struct tegra_se *se, struct tegra_sha_reqctx *rctx)
+static int tegra_sha_do_init(struct ahash_request *req)
 {
-	int i;
+	struct tegra_sha_reqctx *rctx = ahash_request_ctx(req);
+	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+	struct tegra_sha_ctx *ctx = crypto_ahash_ctx(tfm);
+	struct tegra_se *se = ctx->se;
 
-	for (i = 0; i < HASH_RESULT_REG_COUNT; i++)
-		rctx->result[i] = readl(se->base + se->hw->regs->result + (i * 4));
-}
+	if (ctx->fallback)
+		return tegra_sha_fallback_init(req);
 
-static void tegra_sha_paste_hash_result(struct tegra_se *se, struct tegra_sha_reqctx *rctx)
-{
-	int i;
+	rctx->total_len = 0;
+	rctx->datbuf.size = 0;
+	rctx->residue.size = 0;
+	rctx->key_id = ctx->key_id;
+	rctx->task |= SHA_FIRST;
+	rctx->alg = ctx->alg;
+	rctx->blk_size = crypto_ahash_blocksize(tfm);
+	rctx->digest.size = crypto_ahash_digestsize(tfm);
+
+	rctx->digest.buf = dma_alloc_coherent(se->dev, rctx->digest.size,
+					      &rctx->digest.addr, GFP_KERNEL);
+	if (!rctx->digest.buf)
+		goto digbuf_fail;
+
+	rctx->residue.buf = dma_alloc_coherent(se->dev, rctx->blk_size,
+					       &rctx->residue.addr, GFP_KERNEL);
+	if (!rctx->residue.buf)
+		goto resbuf_fail;
+
+	rctx->intr_res.size = HASH_RESULT_REG_COUNT * 4;
+	rctx->intr_res.buf = dma_alloc_coherent(se->dev, rctx->intr_res.size,
+						&rctx->intr_res.addr, GFP_KERNEL);
+	if (!rctx->intr_res.buf)
+		goto intr_res_fail;
+
+	return 0;
 
-	for (i = 0; i < HASH_RESULT_REG_COUNT; i++)
-		writel(rctx->result[i],
-		       se->base + se->hw->regs->result + (i * 4));
+intr_res_fail:
+	dma_free_coherent(se->dev, rctx->residue.size, rctx->residue.buf,
+			  rctx->residue.addr);
+resbuf_fail:
+	dma_free_coherent(se->dev, rctx->digest.size, rctx->digest.buf,
+			  rctx->digest.addr);
+digbuf_fail:
+	return -ENOMEM;
 }
 
 static int tegra_sha_do_update(struct ahash_request *req)
 {
 	struct tegra_sha_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
 	struct tegra_sha_reqctx *rctx = ahash_request_ctx(req);
+	struct tegra_se *se = ctx->se;
 	unsigned int nblks, nresidue, size, ret;
-	u32 *cpuvaddr = ctx->se->cmdbuf->addr;
+	u32 *cpuvaddr = se->cmdbuf->addr;
 
 	nresidue = (req->nbytes + rctx->residue.size) % rctx->blk_size;
 	nblks = (req->nbytes + rctx->residue.size) / rctx->blk_size;
@@ -317,7 +415,6 @@ static int tegra_sha_do_update(struct ahash_request *req)
 
 	rctx->src_sg = req->src;
 	rctx->datbuf.size = (req->nbytes + rctx->residue.size) - nresidue;
-	rctx->total_len += rctx->datbuf.size;
 
 	/*
 	 * If nbytes are less than a block size, copy it residue and
@@ -326,11 +423,16 @@ static int tegra_sha_do_update(struct ahash_request *req)
 	if (nblks < 1) {
 		scatterwalk_map_and_copy(rctx->residue.buf + rctx->residue.size,
 					 rctx->src_sg, 0, req->nbytes, 0);
-
 		rctx->residue.size += req->nbytes;
+
 		return 0;
 	}
 
+	rctx->datbuf.buf = dma_alloc_coherent(se->dev, rctx->datbuf.size,
+					      &rctx->datbuf.addr, GFP_KERNEL);
+	if (!rctx->datbuf.buf)
+		return -ENOMEM;
+
 	/* Copy the previous residue first */
 	if (rctx->residue.size)
 		memcpy(rctx->datbuf.buf, rctx->residue.buf, rctx->residue.size);
@@ -343,29 +445,16 @@ static int tegra_sha_do_update(struct ahash_request *req)
 
 	/* Update residue value with the residue after current block */
 	rctx->residue.size = nresidue;
+	rctx->total_len += rctx->datbuf.size;
 
 	rctx->config = tegra_sha_get_config(rctx->alg) |
-			SE_SHA_DST_HASH_REG;
-
-	/*
-	 * If this is not the first 'update' call, paste the previous copied
-	 * intermediate results to the registers so that it gets picked up.
-	 * This is to support the import/export functionality.
-	 */
-	if (!(rctx->task & SHA_FIRST))
-		tegra_sha_paste_hash_result(ctx->se, rctx);
+			SE_SHA_DST_MEMORY;
 
-	size = tegra_sha_prep_cmd(ctx->se, cpuvaddr, rctx);
+	size = tegra_sha_prep_cmd(ctx, cpuvaddr, rctx);
+	ret = tegra_se_host1x_submit(se, se->cmdbuf, size);
 
-	ret = tegra_se_host1x_submit(ctx->se, size);
-
-	/*
-	 * If this is not the final update, copy the intermediate results
-	 * from the registers so that it can be used in the next 'update'
-	 * call. This is to support the import/export functionality.
-	 */
-	if (!(rctx->task & SHA_FINAL))
-		tegra_sha_copy_hash_result(ctx->se, rctx);
+	dma_free_coherent(se->dev, rctx->datbuf.size,
+			  rctx->datbuf.buf, rctx->datbuf.addr);
 
 	return ret;
 }
@@ -379,16 +468,25 @@ static int tegra_sha_do_final(struct ahash_request *req)
 	u32 *cpuvaddr = se->cmdbuf->addr;
 	int size, ret = 0;
 
-	memcpy(rctx->datbuf.buf, rctx->residue.buf, rctx->residue.size);
+	if (rctx->residue.size) {
+		rctx->datbuf.buf = dma_alloc_coherent(se->dev, rctx->residue.size,
+						      &rctx->datbuf.addr, GFP_KERNEL);
+		if (!rctx->datbuf.buf) {
+			ret = -ENOMEM;
+			goto out_free;
+		}
+
+		memcpy(rctx->datbuf.buf, rctx->residue.buf, rctx->residue.size);
+	}
+
 	rctx->datbuf.size = rctx->residue.size;
 	rctx->total_len += rctx->residue.size;
 
 	rctx->config = tegra_sha_get_config(rctx->alg) |
 		       SE_SHA_DST_MEMORY;
 
-	size = tegra_sha_prep_cmd(se, cpuvaddr, rctx);
-
-	ret = tegra_se_host1x_submit(se, size);
+	size = tegra_sha_prep_cmd(ctx, cpuvaddr, rctx);
+	ret = tegra_se_host1x_submit(se, se->cmdbuf, size);
 	if (ret)
 		goto out;
 
@@ -396,12 +494,18 @@ static int tegra_sha_do_final(struct ahash_request *req)
 	memcpy(req->result, rctx->digest.buf, rctx->digest.size);
 
 out:
-	dma_free_coherent(se->dev, SE_SHA_BUFLEN,
-			  rctx->datbuf.buf, rctx->datbuf.addr);
+	if (rctx->residue.size)
+		dma_free_coherent(se->dev, rctx->datbuf.size,
+				  rctx->datbuf.buf, rctx->datbuf.addr);
+out_free:
 	dma_free_coherent(se->dev, crypto_ahash_blocksize(tfm),
 			  rctx->residue.buf, rctx->residue.addr);
 	dma_free_coherent(se->dev, rctx->digest.size, rctx->digest.buf,
 			  rctx->digest.addr);
+
+	dma_free_coherent(se->dev, rctx->intr_res.size, rctx->intr_res.buf,
+			  rctx->intr_res.addr);
+
 	return ret;
 }
 
@@ -414,16 +518,31 @@ static int tegra_sha_do_one_req(struct crypto_engine *engine, void *areq)
 	struct tegra_se *se = ctx->se;
 	int ret = 0;
 
+	if (rctx->task & SHA_INIT) {
+		ret = tegra_sha_do_init(req);
+		if (ret)
+			goto out;
+
+		rctx->task &= ~SHA_INIT;
+	}
+
 	if (rctx->task & SHA_UPDATE) {
 		ret = tegra_sha_do_update(req);
+		if (ret)
+			goto out;
+
 		rctx->task &= ~SHA_UPDATE;
 	}
 
 	if (rctx->task & SHA_FINAL) {
 		ret = tegra_sha_do_final(req);
+		if (ret)
+			goto out;
+
 		rctx->task &= ~SHA_FINAL;
 	}
 
+out:
 	crypto_finalize_hash_request(se->engine, req, ret);
 
 	return 0;
@@ -497,52 +616,6 @@ static void tegra_sha_cra_exit(struct crypto_tfm *tfm)
 	tegra_key_invalidate(ctx->se, ctx->key_id, ctx->alg);
 }
 
-static int tegra_sha_init(struct ahash_request *req)
-{
-	struct tegra_sha_reqctx *rctx = ahash_request_ctx(req);
-	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
-	struct tegra_sha_ctx *ctx = crypto_ahash_ctx(tfm);
-	struct tegra_se *se = ctx->se;
-
-	if (ctx->fallback)
-		return tegra_sha_fallback_init(req);
-
-	rctx->total_len = 0;
-	rctx->datbuf.size = 0;
-	rctx->residue.size = 0;
-	rctx->key_id = ctx->key_id;
-	rctx->task = SHA_FIRST;
-	rctx->alg = ctx->alg;
-	rctx->blk_size = crypto_ahash_blocksize(tfm);
-	rctx->digest.size = crypto_ahash_digestsize(tfm);
-
-	rctx->digest.buf = dma_alloc_coherent(se->dev, rctx->digest.size,
-					      &rctx->digest.addr, GFP_KERNEL);
-	if (!rctx->digest.buf)
-		goto digbuf_fail;
-
-	rctx->residue.buf = dma_alloc_coherent(se->dev, rctx->blk_size,
-					       &rctx->residue.addr, GFP_KERNEL);
-	if (!rctx->residue.buf)
-		goto resbuf_fail;
-
-	rctx->datbuf.buf = dma_alloc_coherent(se->dev, SE_SHA_BUFLEN,
-					      &rctx->datbuf.addr, GFP_KERNEL);
-	if (!rctx->datbuf.buf)
-		goto datbuf_fail;
-
-	return 0;
-
-datbuf_fail:
-	dma_free_coherent(se->dev, rctx->blk_size, rctx->residue.buf,
-			  rctx->residue.addr);
-resbuf_fail:
-	dma_free_coherent(se->dev, SE_SHA_BUFLEN, rctx->datbuf.buf,
-			  rctx->datbuf.addr);
-digbuf_fail:
-	return -ENOMEM;
-}
-
 static int tegra_hmac_fallback_setkey(struct tegra_sha_ctx *ctx, const u8 *key,
 				      unsigned int keylen)
 {
@@ -559,13 +632,29 @@ static int tegra_hmac_setkey(struct crypto_ahash *tfm, const u8 *key,
 			     unsigned int keylen)
 {
 	struct tegra_sha_ctx *ctx = crypto_ahash_ctx(tfm);
+	int ret;
 
 	if (aes_check_keylen(keylen))
 		return tegra_hmac_fallback_setkey(ctx, key, keylen);
 
+	ret = tegra_key_submit(ctx->se, key, keylen, ctx->alg, &ctx->key_id);
+	if (ret)
+		return tegra_hmac_fallback_setkey(ctx, key, keylen);
+
 	ctx->fallback = false;
 
-	return tegra_key_submit(ctx->se, key, keylen, ctx->alg, &ctx->key_id);
+	return 0;
+}
+
+static int tegra_sha_init(struct ahash_request *req)
+{
+	struct tegra_sha_reqctx *rctx = ahash_request_ctx(req);
+	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+	struct tegra_sha_ctx *ctx = crypto_ahash_ctx(tfm);
+
+	rctx->task = SHA_INIT;
+
+	return crypto_transfer_hash_request_to_engine(ctx->se->engine, req);
 }
 
 static int tegra_sha_update(struct ahash_request *req)
@@ -615,16 +704,12 @@ static int tegra_sha_digest(struct ahash_request *req)
 	struct tegra_sha_reqctx *rctx = ahash_request_ctx(req);
 	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
 	struct tegra_sha_ctx *ctx = crypto_ahash_ctx(tfm);
-	int ret;
 
 	if (ctx->fallback)
 		return tegra_sha_fallback_digest(req);
 
-	ret = tegra_sha_init(req);
-	if (ret)
-		return ret;
+	rctx->task |= SHA_INIT | SHA_UPDATE | SHA_FINAL;
 
-	rctx->task |= SHA_UPDATE | SHA_FINAL;
 	return crypto_transfer_hash_request_to_engine(ctx->se->engine, req);
 }