Commit 694ff00c authored by Thara Gopinath's avatar Thara Gopinath Committed by Herbert Xu
Browse files

crypto: qce - Add support to initialize interconnect path 



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.

Tested-by: default avatarJordan Crouse <jorcrous@amazon.com>
Signed-off-by: default avatarThara Gopinath <thara.gopinath@gmail.com>
[Bhupesh: Make header file inclusion alphabetical and use devm_of_icc_get()]
Signed-off-by: default avatarBhupesh Sharma <bhupesh.sharma@linaro.org>
[vladimir: moved icc bandwidth setup closer to its acquisition]
Signed-off-by: default avatarVladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Reviewed-by: default avatarKonrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent e47a8078

drivers/crypto/qce/core.c

+15 −1
Original line number Diff line number Diff line
@@ -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>
@@ -22,6 +23,8 @@ 
#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,
@@ -218,10 +221,18 @@ static int qce_crypto_probe(struct platform_device *pdev) 
	if (IS_ERR(qce->bus))

		return PTR_ERR(qce->bus);



	ret = clk_prepare_enable(qce->core);

	qce->mem_path = devm_of_icc_get(qce->dev, "memory");

	if (IS_ERR(qce->mem_path))

		return PTR_ERR(qce->mem_path);



	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)

		goto err_mem_path_disable;



	ret = clk_prepare_enable(qce->iface);

	if (ret)

		goto err_clks_core;
@@ -260,6 +271,9 @@ static int qce_crypto_probe(struct platform_device *pdev) 
	clk_disable_unprepare(qce->iface);

err_clks_core:

	clk_disable_unprepare(qce->core);

err_mem_path_disable:

	icc_set_bw(qce->mem_path, 0, 0);



	return ret;

}

drivers/crypto/qce/core.h

+1 −0
Original line number Diff line number Diff line
@@ -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;