linux-kernel - [PATCH v3 11/17] crypto: qce: core: Add support to initialize interconnect path

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Message-Id: <20210519143700.27392-12-bhupesh.sharma@linaro.org>
Date:   Wed, 19 May 2021 20:06:54 +0530
From:   Bhupesh Sharma <bhupesh.sharma@...aro.org>
To:     linux-arm-msm@...r.kernel.org
Cc:     bhupesh.sharma@...aro.org,
        Thara Gopinath <thara.gopinath@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S . Miller" <davem@...emloft.net>,
        Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Vinod Koul <vkoul@...nel.org>, dmaengine@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-crypto@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        bhupesh.linux@...il.com
Subject: [PATCH v3 11/17] crypto: qce: core: Add support to initialize interconnect path

From: Thara Gopinath <thara.gopinath@...aro.org>

Crypto engine on certain Snapdragon processors like sm8150, sm8250, sm8350
etc. requires interconnect path between the engine and memory to be
explicitly enabled and bandwidth set prior to any operations. Add support
in the qce core to enable the interconnect path appropriately.

Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: Andy Gross <agross@...nel.org>
Cc: Herbert Xu <herbert@...dor.apana.org.au>
Cc: David S. Miller <davem@...emloft.net>
Cc: Stephen Boyd <sboyd@...nel.org>
Cc: Michael Turquette <mturquette@...libre.com>
Cc: Vinod Koul <vkoul@...nel.org>
Cc: dmaengine@...r.kernel.org
Cc: linux-clk@...r.kernel.org
Cc: linux-crypto@...r.kernel.org
Cc: devicetree@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: bhupesh.linux@...il.com
Signed-off-by: Thara Gopinath <thara.gopinath@...aro.org>
[ bhupesh.sharma@...aro.org: Make header file inclusion alphabetical and use devm_of_icc_get() ]
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@...aro.org>
---
 drivers/crypto/qce/core.c | 12 ++++++++++++
 drivers/crypto/qce/core.h |  1 +
 2 files changed, 13 insertions(+)

diff --git a/drivers/crypto/qce/core.c b/drivers/crypto/qce/core.c
index 80b75085c265..89a17b677607 100644
--- a/drivers/crypto/qce/core.c
+++ b/drivers/crypto/qce/core.c
@@ -5,6 +5,7 @@
 
 #include <linux/clk.h>
 #include <linux/dma-mapping.h>
+#include <linux/interconnect.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
@@ -21,6 +22,8 @@
 #define QCE_MAJOR_VERSION5	0x05
 #define QCE_QUEUE_LENGTH	1
 
+#define QCE_DEFAULT_MEM_BANDWIDTH	393600
+
 static const struct qce_algo_ops *qce_ops[] = {
 #ifdef CONFIG_CRYPTO_DEV_QCE_SKCIPHER
 	&skcipher_ops,
@@ -202,6 +205,11 @@ static int qce_crypto_probe(struct platform_device *pdev)
 	if (ret < 0)
 		return ret;
 
+	qce->mem_path = devm_of_icc_get(qce->dev, "memory");
+	if (IS_ERR(qce->mem_path))
+		return dev_err_probe(dev, PTR_ERR(qce->mem_path),
+				     "Failed to get mem path\n");
+
 	qce->core = devm_clk_get(qce->dev, "core");
 	if (IS_ERR(qce->core))
 		return PTR_ERR(qce->core);
@@ -214,6 +222,10 @@ static int qce_crypto_probe(struct platform_device *pdev)
 	if (IS_ERR(qce->bus))
 		return PTR_ERR(qce->bus);
 
+	ret = icc_set_bw(qce->mem_path, QCE_DEFAULT_MEM_BANDWIDTH, QCE_DEFAULT_MEM_BANDWIDTH);
+	if (ret)
+		return ret;
+
 	ret = clk_prepare_enable(qce->core);
 	if (ret)
 		return ret;
diff --git a/drivers/crypto/qce/core.h b/drivers/crypto/qce/core.h
index 085774cdf641..228fcd69ec51 100644
--- a/drivers/crypto/qce/core.h
+++ b/drivers/crypto/qce/core.h
@@ -35,6 +35,7 @@ struct qce_device {
 	void __iomem *base;
 	struct device *dev;
 	struct clk *core, *iface, *bus;
+	struct icc_path *mem_path;
 	struct qce_dma_data dma;
 	int burst_size;
 	unsigned int pipe_pair_id;
-- 
2.31.1