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From: Md Sadre Alam <quic_mdalam@quicinc.com>
To: thara.gopinath@gmail.com, herbert@gondor.apana.org.au, davem@davemloft.net,
        agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org,
        vkoul@kernel.org, linux-crypto@vger.kernel.org,
        linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
        dmaengine@vger.kernel.org, quic_srichara@quicinc.com,
        quic_varada@quicinc.com
Cc: quic_mdalam@quicinc.com
Subject: [PATCH 03/11] crypto: qce - Convert register r/w for skcipher via BAM/DMA
Date: Thu, 14 Dec 2023 17:12:31 +0530
Message-Id: <20231214114239.2635325-4-quic_mdalam@quicinc.com>
In-Reply-To: <20231214114239.2635325-1-quic_mdalam@quicinc.com>
References: <20231214114239.2635325-1-quic_mdalam@quicinc.com>
Precedence: bulk
MIME-Version: 1.0
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Convert register read/write for skcipher via BAM/DMA.
with this change all the crypto register configuration
will be done via BAM/DMA. This change will prepare command
descriptor for all register and write it once.

Signed-off-by: Md Sadre Alam <quic_mdalam@quicinc.com>
---
 drivers/crypto/qce/common.c   | 42 +++++++++++++++++++++--------------
 drivers/crypto/qce/skcipher.c | 12 ++++++++++
 2 files changed, 37 insertions(+), 17 deletions(-)

diff --git a/drivers/crypto/qce/common.c b/drivers/crypto/qce/common.c
index 04253a8d3340..d1da6b1938f3 100644
--- a/drivers/crypto/qce/common.c
+++ b/drivers/crypto/qce/common.c
@@ -34,7 +34,7 @@ static inline void qce_write_array(struct qce_device *qce, u32 offset,
 	int i;
 
 	for (i = 0; i < len; i++)
-		qce_write(qce, offset + i * sizeof(u32), val[i]);
+		qce_write_reg_dma(qce, offset + i * sizeof(u32), val[i], 1);
 }
 
 static inline void
@@ -43,7 +43,7 @@ qce_clear_array(struct qce_device *qce, u32 offset, unsigned int len)
 	int i;
 
 	for (i = 0; i < len; i++)
-		qce_write(qce, offset + i * sizeof(u32), 0);
+		qce_write_reg_dma(qce, offset + i * sizeof(u32), 0, 1);
 }
 
 static u32 qce_config_reg(struct qce_device *qce, int little)
@@ -86,16 +86,16 @@ static void qce_setup_config(struct qce_device *qce)
 	config = qce_config_reg(qce, 0);
 
 	/* clear status */
-	qce_write(qce, REG_STATUS, 0);
-	qce_write(qce, REG_CONFIG, config);
+	qce_write_reg_dma(qce, REG_STATUS, 0, 1);
+	qce_write_reg_dma(qce, REG_CONFIG, config, 1);
 }
 
 static inline void qce_crypto_go(struct qce_device *qce, bool result_dump)
 {
 	if (result_dump)
-		qce_write(qce, REG_GOPROC, BIT(GO_SHIFT) | BIT(RESULTS_DUMP_SHIFT));
+		qce_write_reg_dma(qce, REG_GOPROC, BIT(GO_SHIFT) | BIT(RESULTS_DUMP_SHIFT), 1);
 	else
-		qce_write(qce, REG_GOPROC, BIT(GO_SHIFT));
+		qce_write_reg_dma(qce, REG_GOPROC, BIT(GO_SHIFT), 1);
 }
 
 #if defined(CONFIG_CRYPTO_DEV_QCE_SHA) || defined(CONFIG_CRYPTO_DEV_QCE_AEAD)
@@ -308,7 +308,7 @@ static void qce_xtskey(struct qce_device *qce, const u8 *enckey,
 	/* Set data unit size to cryptlen. Anything else causes
 	 * crypto engine to return back incorrect results.
 	 */
-	qce_write(qce, REG_ENCR_XTS_DU_SIZE, cryptlen);
+	qce_write_reg_dma(qce, REG_ENCR_XTS_DU_SIZE, cryptlen, 1);
 }
 
 static int qce_setup_regs_skcipher(struct crypto_async_request *async_req)
@@ -325,7 +325,9 @@ static int qce_setup_regs_skcipher(struct crypto_async_request *async_req)
 	u32 encr_cfg = 0, auth_cfg = 0, config;
 	unsigned int ivsize = rctx->ivsize;
 	unsigned long flags = rctx->flags;
+	int ret;
 
+	qce_clear_bam_transaction(qce);
 	qce_setup_config(qce);
 
 	if (IS_XTS(flags))
@@ -336,7 +338,7 @@ static int qce_setup_regs_skcipher(struct crypto_async_request *async_req)
 	qce_cpu_to_be32p_array(enckey, ctx->enc_key, keylen);
 	enckey_words = keylen / sizeof(u32);
 
-	qce_write(qce, REG_AUTH_SEG_CFG, auth_cfg);
+	qce_write_reg_dma(qce, REG_AUTH_SEG_CFG, auth_cfg, 1);
 
 	encr_cfg = qce_encr_cfg(flags, keylen);
 
@@ -369,25 +371,31 @@ static int qce_setup_regs_skcipher(struct crypto_async_request *async_req)
 	if (IS_ENCRYPT(flags))
 		encr_cfg |= BIT(ENCODE_SHIFT);
 
-	qce_write(qce, REG_ENCR_SEG_CFG, encr_cfg);
-	qce_write(qce, REG_ENCR_SEG_SIZE, rctx->cryptlen);
-	qce_write(qce, REG_ENCR_SEG_START, 0);
+	qce_write_reg_dma(qce, REG_ENCR_SEG_CFG, encr_cfg, 1);
+	qce_write_reg_dma(qce, REG_ENCR_SEG_SIZE, rctx->cryptlen, 1);
+	qce_write_reg_dma(qce, REG_ENCR_SEG_START, 0, 1);
 
 	if (IS_CTR(flags)) {
-		qce_write(qce, REG_CNTR_MASK, ~0);
-		qce_write(qce, REG_CNTR_MASK0, ~0);
-		qce_write(qce, REG_CNTR_MASK1, ~0);
-		qce_write(qce, REG_CNTR_MASK2, ~0);
+		qce_write_reg_dma(qce, REG_CNTR_MASK, ~0, 1);
+		qce_write_reg_dma(qce, REG_CNTR_MASK0, ~0, 1);
+		qce_write_reg_dma(qce, REG_CNTR_MASK1, ~0, 1);
+		qce_write_reg_dma(qce, REG_CNTR_MASK2, ~0, 1);
 	}
 
-	qce_write(qce, REG_SEG_SIZE, rctx->cryptlen);
+	qce_write_reg_dma(qce, REG_SEG_SIZE, rctx->cryptlen, 1);
 
 	/* get little endianness */
 	config = qce_config_reg(qce, 1);
-	qce_write(qce, REG_CONFIG, config);
+	qce_write_reg_dma(qce, REG_CONFIG, config, 1);
 
 	qce_crypto_go(qce, true);
 
+	ret = qce_submit_cmd_desc(qce, 0);
+	if (ret) {
+		dev_err(qce->dev, "Error in skcipher cmd descriptor\n");
+		return ret;
+	}
+
 	return 0;
 }
 #endif
diff --git a/drivers/crypto/qce/skcipher.c b/drivers/crypto/qce/skcipher.c
index 5b493fdc1e74..fa7ee5db9aa0 100644
--- a/drivers/crypto/qce/skcipher.c
+++ b/drivers/crypto/qce/skcipher.c
@@ -31,6 +31,7 @@ static void qce_skcipher_done(void *data)
 	struct qce_cipher_reqctx *rctx = skcipher_request_ctx(req);
 	struct qce_alg_template *tmpl = to_cipher_tmpl(crypto_skcipher_reqtfm(req));
 	struct qce_device *qce = tmpl->qce;
+	struct qce_bam_transaction *qce_bam_txn = qce->dma.qce_bam_txn;
 	struct qce_result_dump *result_buf = qce->dma.result_buf;
 	enum dma_data_direction dir_src, dir_dst;
 	u32 status;
@@ -52,6 +53,17 @@ static void qce_skcipher_done(void *data)
 
 	sg_free_table(&rctx->dst_tbl);
 
+	if (qce_bam_txn->qce_read_sgl_cnt)
+		dma_unmap_sg(qce->dev,
+			     qce_bam_txn->qce_reg_read_sgl,
+			qce_bam_txn->qce_read_sgl_cnt,
+			DMA_DEV_TO_MEM);
+	if (qce_bam_txn->qce_write_sgl_cnt)
+		dma_unmap_sg(qce->dev,
+			     qce_bam_txn->qce_reg_write_sgl,
+			qce_bam_txn->qce_write_sgl_cnt,
+			DMA_MEM_TO_DEV);
+
 	error = qce_check_status(qce, &status);
 	if (error < 0)
 		dev_dbg(qce->dev, "skcipher operation error (%x)\n", status);
-- 
2.34.1