linux-kernel - [PATCH v4 19/25] firmware: xilinx: Remove eemi ops for aes engine

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Date:   Thu,  9 Apr 2020 12:12:08 -0700
From:   Jolly Shah <jolly.shah@...inx.com>
To:     ard.biesheuvel@...aro.org, mingo@...nel.org,
        gregkh@...uxfoundation.org, matt@...eblueprint.co.uk,
        sudeep.holla@....com, hkallweit1@...il.com, keescook@...omium.org,
        dmitry.torokhov@...il.com, michal.simek@...inx.com
Cc:     rajanv@...inx.com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Rajan Vaja <rajan.vaja@...inx.com>,
        Jolly Shah <jolly.shah@...inx.com>
Subject: [PATCH v4 19/25] firmware: xilinx: Remove eemi ops for aes engine

From: Rajan Vaja <rajan.vaja@...inx.com>

Use direct function call for aes engine instead of using eemi ops.

Signed-off-by: Rajan Vaja <rajan.vaja@...inx.com>
Signed-off-by: Jolly Shah <jolly.shah@...inx.com>
---
 drivers/crypto/xilinx/zynqmp-aes-gcm.c | 12 +-----------
 drivers/firmware/xilinx/zynqmp.c       |  4 ++--
 include/linux/firmware/xlnx-zynqmp.h   |  6 +++++-
 3 files changed, 8 insertions(+), 14 deletions(-)

diff --git a/drivers/crypto/xilinx/zynqmp-aes-gcm.c b/drivers/crypto/xilinx/zynqmp-aes-gcm.c
index 09f7f46..d0a0daf 100644
--- a/drivers/crypto/xilinx/zynqmp-aes-gcm.c
+++ b/drivers/crypto/xilinx/zynqmp-aes-gcm.c
@@ -46,7 +46,6 @@ struct zynqmp_aead_drv_ctx {
 	} alg;
 	struct device *dev;
 	struct crypto_engine *engine;
-	const struct zynqmp_eemi_ops *eemi_ops;
 };
 
 struct zynqmp_aead_hw_req {
@@ -92,9 +91,6 @@ static int zynqmp_aes_aead_cipher(struct aead_request *req)
 
 	drv_ctx = container_of(alg, struct zynqmp_aead_drv_ctx, alg.aead);
 
-	if (!drv_ctx->eemi_ops->aes)
-		return -ENOTSUPP;
-
 	if (tfm_ctx->keysrc == ZYNQMP_AES_KUP_KEY)
 		dma_size = req->cryptlen + ZYNQMP_AES_KEY_SIZE
 			   + GCM_AES_IV_SIZE;
@@ -136,7 +132,7 @@ static int zynqmp_aes_aead_cipher(struct aead_request *req)
 		hwreq->key = 0;
 	}
 
-	drv_ctx->eemi_ops->aes(dma_addr_hw_req, &status);
+	zynqmp_pm_aes_engine(dma_addr_hw_req, &status);
 
 	if (status) {
 		switch (status) {
@@ -388,12 +384,6 @@ static int zynqmp_aes_aead_probe(struct platform_device *pdev)
 	else
 		return -ENODEV;
 
-	aes_drv_ctx.eemi_ops = zynqmp_pm_get_eemi_ops();
-	if (IS_ERR(aes_drv_ctx.eemi_ops)) {
-		dev_err(dev, "Failed to get ZynqMP EEMI interface\n");
-		return PTR_ERR(aes_drv_ctx.eemi_ops);
-	}
-
 	err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(ZYNQMP_DMA_BIT_MASK));
 	if (err < 0) {
 		dev_err(dev, "No usable DMA configuration\n");
diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 0c5c8bc..e6e7b63 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -795,7 +795,7 @@ EXPORT_SYMBOL_GPL(zynqmp_pm_set_requirement);
  *
  * Return:	Returns status, either success or error code.
  */
-static int zynqmp_pm_aes_engine(const u64 address, u32 *out)
+int zynqmp_pm_aes_engine(const u64 address, u32 *out)
 {
 	u32 ret_payload[PAYLOAD_ARG_CNT];
 	int ret;
@@ -810,11 +810,11 @@ static int zynqmp_pm_aes_engine(const u64 address, u32 *out)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(zynqmp_pm_aes_engine);
 
 static const struct zynqmp_eemi_ops eemi_ops = {
 	.fpga_load = zynqmp_pm_fpga_load,
 	.fpga_get_status = zynqmp_pm_fpga_get_status,
-	.aes = zynqmp_pm_aes_engine,
 };
 
 /**
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 5927f6f..11d7aef 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -296,7 +296,6 @@ struct zynqmp_pm_query_data {
 struct zynqmp_eemi_ops {
 	int (*fpga_load)(const u64 address, const u32 size, const u32 flags);
 	int (*fpga_get_status)(u32 *value);
-	int (*aes)(const u64 address, u32 *out);
 };
 
 int zynqmp_pm_invoke_fn(u32 pm_api_id, u32 arg0, u32 arg1,
@@ -333,6 +332,7 @@ int zynqmp_pm_release_node(const u32 node);
 int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities,
 			      const u32 qos,
 			      const enum zynqmp_pm_request_ack ack);
+int zynqmp_pm_aes_engine(const u64 address, u32 *out);
 #else
 static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void)
 {
@@ -446,6 +446,10 @@ static inline int zynqmp_pm_set_requirement(const u32 node,
 {
 	return -ENODEV;
 }
+static inline int zynqmp_pm_aes_engine(const u64 address, u32 *out)
+{
+	return -ENODEV;
+}
 #endif
 
 #endif /* __FIRMWARE_ZYNQMP_H__ */
-- 
2.7.4