linux-kernel - [PATCH v5 04/12] crypto: qce - Add support for crypto address read

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Message-ID: <20241212041639.4109039-5-quic_mdalam@quicinc.com>
Date: Thu, 12 Dec 2024 09:46:31 +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>,
        <kees@...nel.org>, <dave.jiang@...el.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_srichara@...cinc.com>, <quic_varada@...cinc.com>,
        <quic_mdalam@...cinc.com>, <quic_utiwari@...cinc.com>
Subject: [PATCH v5 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 [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 | 14 ++++++++++++--
 drivers/crypto/qce/core.h |  1 +
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/qce/core.c b/drivers/crypto/qce/core.c
index e228a31fe28d..9306e09d0d80 100644
--- a/drivers/crypto/qce/core.c
+++ b/drivers/crypto/qce/core.c
@@ -192,6 +192,7 @@ 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);
@@ -201,7 +202,7 @@ 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);
 
@@ -261,7 +262,12 @@ static int qce_crypto_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_dma;
 
-	return 0;
+	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 0;
 
 err_dma:
 	qce_dma_release(&qce->dma);
@@ -280,6 +286,7 @@ static int qce_crypto_probe(struct platform_device *pdev)
 static void qce_crypto_remove(struct platform_device *pdev)
 {
 	struct qce_device *qce = platform_get_drvdata(pdev);
+	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
 	tasklet_kill(&qce->done_tasklet);
 	qce_unregister_algs(qce);
@@ -287,6 +294,9 @@ static void qce_crypto_remove(struct platform_device *pdev)
 	clk_disable_unprepare(qce->bus);
 	clk_disable_unprepare(qce->iface);
 	clk_disable_unprepare(qce->core);
+
+	dma_unmap_resource(&pdev->dev, qce->base_dma, resource_size(res),
+			   DMA_BIDIRECTIONAL, 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 228fcd69ec51..25e2af45c047 100644
--- a/drivers/crypto/qce/core.h
+++ b/drivers/crypto/qce/core.h
@@ -39,6 +39,7 @@ 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