linux-kernel - [PATCH v6 04/12] crypto: qce - Add support for crypto address read

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Message-ID: <20250115103004.3350561-5-quic_mdalam@quicinc.com>
Date: Wed, 15 Jan 2025 15:59:56 +0530
From: Md Sadre Alam <quic_mdalam@...cinc.com>
To: <vkoul@...nel.org>, <corbet@....net>, <thara.gopinath@...il.com>,
        <herbert@...dor.apana.org.au>, <davem@...emloft.net>,
        <martin.petersen@...cle.com>, <enghua.yu@...el.com>,
        <u.kleine-koenig@...libre.com>, <dmaengine@...r.kernel.org>,
        <linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-crypto@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>
CC: <quic_mdalam@...cinc.com>, <quic_utiwari@...cinc.com>,
        <quic_srichara@...cinc.com>, <quic_varada@...cinc.com>
Subject: [PATCH v6 04/12] crypto: qce - Add support for crypto address read

Get crypto base address from DT. This will use for
command descriptor support for crypto register r/w
via BAM/DMA.

Signed-off-by: Md Sadre Alam <quic_mdalam@...cinc.com>
---

Change in [v6]

* No Change

Change in [v5]

* No Change

Change in [v4]

* Added error handling path for dma_map_resource()

Change in [v3]

* Added dma_unmap_resource() in qce_crypto_remove()

Change in [v2]

* Added crypto added read from device tree

Change in [v1]

* This patch was not included in [v1]

 drivers/crypto/qce/core.c | 16 ++++++++++++++--
 drivers/crypto/qce/core.h |  1 +
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/qce/core.c b/drivers/crypto/qce/core.c
index e95e84486d9a..ba856cd0c2d8 100644
--- a/drivers/crypto/qce/core.c
+++ b/drivers/crypto/qce/core.c
@@ -191,6 +191,7 @@ static int qce_crypto_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct qce_device *qce;
+	struct resource *res;
 	int ret;
 
 	qce = devm_kzalloc(dev, sizeof(*qce), GFP_KERNEL);
@@ -200,7 +201,7 @@ static int qce_crypto_probe(struct platform_device *pdev)
 	qce->dev = dev;
 	platform_set_drvdata(pdev, qce);
 
-	qce->base = devm_platform_ioremap_resource(pdev, 0);
+	qce->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
 	if (IS_ERR(qce->base))
 		return PTR_ERR(qce->base);
 
@@ -246,7 +247,18 @@ static int qce_crypto_probe(struct platform_device *pdev)
 	qce->async_req_enqueue = qce_async_request_enqueue;
 	qce->async_req_done = qce_async_request_done;
 
-	return devm_qce_register_algs(qce);
+	ret = devm_qce_register_algs(qce);
+	if (ret)
+		return ret;
+
+	qce->base_dma = dma_map_resource(dev, res->start,
+					 resource_size(res),
+					 DMA_BIDIRECTIONAL, 0);
+	ret = dma_mapping_error(dev, qce->base_dma);
+	if (ret)
+		return ret;
+
+	return 0;
 }
 
 static const struct of_device_id qce_crypto_of_match[] = {
diff --git a/drivers/crypto/qce/core.h b/drivers/crypto/qce/core.h
index eb6fa7a8b64a..0b6350b6076e 100644
--- a/drivers/crypto/qce/core.h
+++ b/drivers/crypto/qce/core.h
@@ -42,6 +42,7 @@ struct qce_device {
 	struct qce_dma_data dma;
 	int burst_size;
 	unsigned int pipe_pair_id;
+	dma_addr_t base_dma;
 	int (*async_req_enqueue)(struct qce_device *qce,
 				 struct crypto_async_request *req);
 	void (*async_req_done)(struct qce_device *qce, int ret);
-- 
2.34.1