[PATCH v14 5/6] firmware: imx: device context dedicated to priv

[Pankaj Gupta]

Add priv_dev_ctx to prepare enabling misc-device context
based send-receive path, to communicate with FW.

No functionality change.

Signed-off-by: Pankaj Gupta <pankaj.gupta at nxp.com>
---
 drivers/firmware/imx/ele_base_msg.c | 10 +++++-----
 drivers/firmware/imx/ele_common.c   |  3 ++-
 drivers/firmware/imx/ele_common.h   |  2 +-
 drivers/firmware/imx/se_ctrl.c      | 31 +++++++++++++++++++++++++++++++
 drivers/firmware/imx/se_ctrl.h      |  8 ++++++++
 5 files changed, 47 insertions(+), 7 deletions(-)

diff --git a/drivers/firmware/imx/ele_base_msg.c b/drivers/firmware/imx/ele_base_msg.c
index 3839c93f8212..c07c21f1fbbd 100644
--- a/drivers/firmware/imx/ele_base_msg.c
+++ b/drivers/firmware/imx/ele_base_msg.c
@@ -62,7 +62,7 @@ int ele_get_info(struct se_if_priv *priv, struct ele_dev_info *s_info)
 	tx_msg->data[0] = upper_32_bits(get_info_addr);
 	tx_msg->data[1] = lower_32_bits(get_info_addr);
 	tx_msg->data[2] = sizeof(*s_info);
-	ret = ele_msg_send_rcv(priv,
+	ret = ele_msg_send_rcv(priv->priv_dev_ctx,
 			       tx_msg,
 			       ELE_GET_INFO_REQ_MSG_SZ,
 			       rx_msg,
@@ -122,7 +122,7 @@ int ele_ping(struct se_if_priv *priv)
 		return ret;
 	}
 
-	ret = ele_msg_send_rcv(priv,
+	ret = ele_msg_send_rcv(priv->priv_dev_ctx,
 			       tx_msg,
 			       ELE_PING_REQ_SZ,
 			       rx_msg,
@@ -174,7 +174,7 @@ int ele_service_swap(struct se_if_priv *priv,
 	if (!tx_msg->data[4])
 		return -EINVAL;
 
-	ret = ele_msg_send_rcv(priv,
+	ret = ele_msg_send_rcv(priv->priv_dev_ctx,
 			       tx_msg,
 			       ELE_SERVICE_SWAP_REQ_MSG_SZ,
 			       rx_msg,
@@ -227,7 +227,7 @@ int ele_fw_authenticate(struct se_if_priv *priv, phys_addr_t addr)
 	tx_msg->data[0] = lower_32_bits(addr);
 	tx_msg->data[2] = addr;
 
-	ret = ele_msg_send_rcv(priv,
+	ret = ele_msg_send_rcv(priv->priv_dev_ctx,
 			       tx_msg,
 			       ELE_FW_AUTH_REQ_SZ,
 			       rx_msg,
@@ -275,7 +275,7 @@ int ele_debug_dump(struct se_if_priv *priv)
 	do {
 		memset(rx_msg, 0x0, ELE_DEBUG_DUMP_RSP_SZ);
 
-		ret = ele_msg_send_rcv(priv,
+		ret = ele_msg_send_rcv(priv->priv_dev_ctx,
 				       tx_msg,
 				       ELE_DEBUG_DUMP_REQ_SZ,
 				       rx_msg,
diff --git a/drivers/firmware/imx/ele_common.c b/drivers/firmware/imx/ele_common.c
index be4dabeeb64c..f75a8237e353 100644
--- a/drivers/firmware/imx/ele_common.c
+++ b/drivers/firmware/imx/ele_common.c
@@ -89,12 +89,13 @@ int ele_msg_send(struct se_if_priv *priv,
 }
 
 /* API used for send/receive blocking call. */
-int ele_msg_send_rcv(struct se_if_priv *priv,
+int ele_msg_send_rcv(struct se_if_device_ctx *dev_ctx,
 		     void *tx_msg,
 		     int tx_msg_sz,
 		     void *rx_msg,
 		     int exp_rx_msg_sz)
 {
+	struct se_if_priv *priv = dev_ctx->priv;
 	int err;
 
 	guard(mutex)(&priv->se_if_cmd_lock);
diff --git a/drivers/firmware/imx/ele_common.h b/drivers/firmware/imx/ele_common.h
index c95e45123b5b..a6bf93f0048f 100644
--- a/drivers/firmware/imx/ele_common.h
+++ b/drivers/firmware/imx/ele_common.h
@@ -18,7 +18,7 @@ int ele_msg_rcv(struct se_if_priv *priv,
 int ele_msg_send(struct se_if_priv *priv,
 		 void *tx_msg,
 		 int tx_msg_sz);
-int ele_msg_send_rcv(struct se_if_priv *priv,
+int ele_msg_send_rcv(struct se_if_device_ctx *dev_ctx,
 		     void *tx_msg,
 		     int tx_msg_sz,
 		     void *rx_msg,
diff --git a/drivers/firmware/imx/se_ctrl.c b/drivers/firmware/imx/se_ctrl.c
index be381980fec0..144a727bbfe0 100644
--- a/drivers/firmware/imx/se_ctrl.c
+++ b/drivers/firmware/imx/se_ctrl.c
@@ -191,6 +191,31 @@ static int get_se_soc_info(struct se_if_priv *priv, const struct se_soc_info *se
 	return 0;
 }
 
+static int init_misc_device_context(struct se_if_priv *priv, int ch_id,
+				    struct se_if_device_ctx **new_dev_ctx)
+{
+	struct se_if_device_ctx *dev_ctx;
+	int ret = 0;
+
+	dev_ctx = devm_kzalloc(priv->dev, sizeof(*dev_ctx), GFP_KERNEL);
+
+	if (!dev_ctx)
+		return -ENOMEM;
+
+	dev_ctx->priv = priv;
+
+	dev_ctx->devname = devm_kasprintf(priv->dev, GFP_KERNEL, "%s%d_ch%d",
+					  SE_TYPE_STR_HSM,
+					  priv->if_defs->se_instance_id,
+					  ch_id);
+	if (!dev_ctx->devname)
+		return -ENOMEM;
+
+	*new_dev_ctx = dev_ctx;
+
+	return ret;
+}
+
 /* interface for managed res to free a mailbox channel */
 static void if_mbox_free_channel(void *mbox_chan)
 {
@@ -317,6 +342,12 @@ static int se_if_probe(struct platform_device *pdev)
 					    "Failed to init reserved memory region.");
 	}
 
+	ret = init_misc_device_context(priv, 0, &priv->priv_dev_ctx);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed[0x%x] to create device contexts.",
+				     ret);
+
 	if (if_node->if_defs.se_if_type == SE_TYPE_ID_HSM) {
 		ret = get_se_soc_info(priv, se_info);
 		if (ret)
diff --git a/drivers/firmware/imx/se_ctrl.h b/drivers/firmware/imx/se_ctrl.h
index 177623f3890e..f0893c5c9145 100644
--- a/drivers/firmware/imx/se_ctrl.h
+++ b/drivers/firmware/imx/se_ctrl.h
@@ -35,6 +35,12 @@ struct se_imem_buf {
 	u32 state;
 };
 
+/* Private struct for each char device instance. */
+struct se_if_device_ctx {
+	struct se_if_priv *priv;
+	const char *devname;
+};
+
 /* Header of the messages exchange with the EdgeLock Enclave */
 struct se_msg_hdr {
 	u8 ver;
@@ -79,6 +85,8 @@ struct se_if_priv {
 
 	struct gen_pool *mem_pool;
 	const struct se_if_defines *if_defs;
+
+	struct se_if_device_ctx *priv_dev_ctx;
 };
 
 #endif

-- 
2.43.0