[PATCH 1/2] powerpc/powernv: Fix endian issues with OPAL async code

[PATCH 1/2] powerpc/powernv: Fix endian issues with OPAL async code

[Anton Blanchard]

Byteswap struct opal_msg in one place instead of requiring all the
callers to do it.

Signed-off-by: Anton Blanchard <anton@samba.org>
---

Index: b/arch/powerpc/include/asm/opal.h
===================================================================
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -421,6 +421,12 @@ enum OpalSysparamPerm {
 	OPAL_SYSPARAM_RW        = (OPAL_SYSPARAM_READ | OPAL_SYSPARAM_WRITE),
 };
 
+struct raw_opal_msg {
+	__be32 msg_type;
+	__be32 reserved;
+	__be64 params[8];
+};
+
 struct opal_msg {
 	uint32_t msg_type;
 	uint32_t reserved;
Index: b/arch/powerpc/platforms/powernv/opal.c
===================================================================
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -288,9 +288,11 @@ static void opal_handle_message(void)
 	 * TODO: pre-allocate a message buffer depending on opal-msg-size
 	 * value in /proc/device-tree.
 	 */
+	static struct raw_opal_msg raw_msg;
 	static struct opal_msg msg;
+	int i;
 
-	ret = opal_get_msg(__pa(&msg), sizeof(msg));
+	ret = opal_get_msg(__pa(&raw_msg), sizeof(raw_msg));
 	/* No opal message pending. */
 	if (ret == OPAL_RESOURCE)
 		return;
@@ -302,6 +304,11 @@ static void opal_handle_message(void)
 		return;
 	}
 
+	msg.msg_type = be32_to_cpu(raw_msg.msg_type);
+	msg.reserved = be32_to_cpu(raw_msg.reserved);
+	for (i = 0; i < ARRAY_SIZE(raw_msg.params); i++)
+		msg.params[i] = be64_to_cpu(raw_msg.params[i]);
+
 	/* Sanity check */
 	if (msg.msg_type > OPAL_MSG_TYPE_MAX) {
 		pr_warning("%s: Unknown message type: %u\n",

[PATCH 2/2] powerpc/powernv: Fix endian issues with sensor code

[Anton Blanchard]

One OPAL call and one device tree property needed byte swapping.

Signed-off-by: Anton Blanchard <anton@samba.org>
---

Index: b/arch/powerpc/platforms/powernv/opal-sensor.c
===================================================================
--- a/arch/powerpc/platforms/powernv/opal-sensor.c
+++ b/arch/powerpc/platforms/powernv/opal-sensor.c
@@ -33,6 +33,7 @@ int opal_get_sensor_data(u32 sensor_hndl
 {
 	int ret, token;
 	struct opal_msg msg;
+	__be32 data;
 
 	token = opal_async_get_token_interruptible();
 	if (token < 0) {
@@ -42,7 +43,7 @@ int opal_get_sensor_data(u32 sensor_hndl
 	}
 
 	mutex_lock(&opal_sensor_mutex);
-	ret = opal_sensor_read(sensor_hndl, token, sensor_data);
+	ret = opal_sensor_read(sensor_hndl, token, &data);
 	if (ret != OPAL_ASYNC_COMPLETION)
 		goto out_token;
 
@@ -53,6 +54,7 @@ int opal_get_sensor_data(u32 sensor_hndl
 		goto out_token;
 	}
 
+	*sensor_data = be32_to_cpu(data);
 	ret = msg.params[1];
 
 out_token:
Index: b/arch/powerpc/include/asm/opal.h
===================================================================
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -886,8 +886,7 @@ int64_t opal_get_param(uint64_t token, u
 		uint64_t length);
 int64_t opal_set_param(uint64_t token, uint32_t param_id, uint64_t buffer,
 		uint64_t length);
-int64_t opal_sensor_read(uint32_t sensor_hndl, int token,
-		uint32_t *sensor_data);
+int64_t opal_sensor_read(uint32_t sensor_hndl, int token, __be32 *sensor_data);
 
 /* Internal functions */
 extern int early_init_dt_scan_opal(unsigned long node, const char *uname,
Index: b/drivers/hwmon/ibmpowernv.c
===================================================================
--- a/drivers/hwmon/ibmpowernv.c
+++ b/drivers/hwmon/ibmpowernv.c
@@ -471,7 +471,7 @@ static int __init powernv_hwmon_init(voi
 	struct device_node *opal, *np = NULL;
 	enum attributes attr_type;
 	enum sensors type;
-	const u32 *sensor_id;
+	u32 sensor_id;
 	u32 sensor_index;
 	int err;
 
@@ -497,14 +497,13 @@ static int __init powernv_hwmon_init(voi
 				&sensor_index))
 			continue;
 
-		sensor_id = of_get_property(np, "sensor-id", NULL);
-		if (!sensor_id) {
+		if (of_property_read_u32(np, "sensor-id", &sensor_id)) {
 			pr_info("%s: %s doesn't have sensor-id\n", __func__,
 					np->name);
 			continue;
 		}
 
-		err = powernv_sensor_init(*sensor_id, np, type, attr_type,
+		err = powernv_sensor_init(sensor_id, np, type, attr_type,
 				sensor_index);
 		if (err) {
 			of_node_put(opal);

Re: [PATCH 1/2] powerpc/powernv: Fix endian issues with OPAL async code

[Benjamin Herrenschmidt]

On Fri, 2014-03-28 at 09:17 +1100, Anton Blanchard wrote:
> Byteswap struct opal_msg in one place instead of requiring all the
> callers to do it.

This will clash with us making opal.h something clean and identical
between OPAL and clients.

Can you rename the converted version instead ? (yeah I know, it suck
to find a good name ...)

Cheers,
Ben.

> Signed-off-by: Anton Blanchard <anton@samba.org>
> ---
> 
> Index: b/arch/powerpc/include/asm/opal.h
> ===================================================================
> --- a/arch/powerpc/include/asm/opal.h
> +++ b/arch/powerpc/include/asm/opal.h
> @@ -421,6 +421,12 @@ enum OpalSysparamPerm {
>  	OPAL_SYSPARAM_RW        = (OPAL_SYSPARAM_READ | OPAL_SYSPARAM_WRITE),
>  };
>  
> +struct raw_opal_msg {
> +	__be32 msg_type;
> +	__be32 reserved;
> +	__be64 params[8];
> +};
> +
>  struct opal_msg {
>  	uint32_t msg_type;
>  	uint32_t reserved;
> Index: b/arch/powerpc/platforms/powernv/opal.c
> ===================================================================
> --- a/arch/powerpc/platforms/powernv/opal.c
> +++ b/arch/powerpc/platforms/powernv/opal.c
> @@ -288,9 +288,11 @@ static void opal_handle_message(void)
>  	 * TODO: pre-allocate a message buffer depending on opal-msg-size
>  	 * value in /proc/device-tree.
>  	 */
> +	static struct raw_opal_msg raw_msg;
>  	static struct opal_msg msg;
> +	int i;
>  
> -	ret = opal_get_msg(__pa(&msg), sizeof(msg));
> +	ret = opal_get_msg(__pa(&raw_msg), sizeof(raw_msg));
>  	/* No opal message pending. */
>  	if (ret == OPAL_RESOURCE)
>  		return;
> @@ -302,6 +304,11 @@ static void opal_handle_message(void)
>  		return;
>  	}
>  
> +	msg.msg_type = be32_to_cpu(raw_msg.msg_type);
> +	msg.reserved = be32_to_cpu(raw_msg.reserved);
> +	for (i = 0; i < ARRAY_SIZE(raw_msg.params); i++)
> +		msg.params[i] = be64_to_cpu(raw_msg.params[i]);
> +
>  	/* Sanity check */
>  	if (msg.msg_type > OPAL_MSG_TYPE_MAX) {
>  		pr_warning("%s: Unknown message type: %u\n",

[PATCH 1/2] powerpc/powernv: Fix endian issues with OPAL async code

[Anton Blanchard]

OPAL defines opal_msg as a big endian struct so we have to
byte swap it on little endian builds.

Signed-off-by: Anton Blanchard <anton@samba.org>
---

Index: b/arch/powerpc/include/asm/opal.h
===================================================================
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -422,9 +422,9 @@ enum OpalSysparamPerm {
 };
 
 struct opal_msg {
-	uint32_t msg_type;
-	uint32_t reserved;
-	uint64_t params[8];
+	__be32 msg_type;
+	__be32 reserved;
+	__be64 params[8];
 };
 
 struct opal_machine_check_event {
Index: b/arch/powerpc/platforms/powernv/opal-async.c
===================================================================
--- a/arch/powerpc/platforms/powernv/opal-async.c
+++ b/arch/powerpc/platforms/powernv/opal-async.c
@@ -125,14 +125,15 @@ static int opal_async_comp_event(struct
 {
 	struct opal_msg *comp_msg = msg;
 	unsigned long flags;
+	uint64_t token;
 
 	if (msg_type != OPAL_MSG_ASYNC_COMP)
 		return 0;
 
-	memcpy(&opal_async_responses[comp_msg->params[0]], comp_msg,
-			sizeof(*comp_msg));
+	token = be64_to_cpu(comp_msg->params[0]);
+	memcpy(&opal_async_responses[token], comp_msg, sizeof(*comp_msg));
 	spin_lock_irqsave(&opal_async_comp_lock, flags);
-	__set_bit(comp_msg->params[0], opal_async_complete_map);
+	__set_bit(token, opal_async_complete_map);
 	spin_unlock_irqrestore(&opal_async_comp_lock, flags);
 
 	wake_up(&opal_async_wait);
Index: b/arch/powerpc/platforms/powernv/opal-sensor.c
===================================================================
--- a/arch/powerpc/platforms/powernv/opal-sensor.c
+++ b/arch/powerpc/platforms/powernv/opal-sensor.c
@@ -53,7 +53,7 @@ int opal_get_sensor_data(u32 sensor_hndl
 		goto out_token;
 	}
 
-	ret = msg.params[1];
+	ret = be64_to_cpu(msg.params[1]);
 
 out_token:
 	mutex_unlock(&opal_sensor_mutex);
Index: b/arch/powerpc/platforms/powernv/opal-sysparam.c
===================================================================
--- a/arch/powerpc/platforms/powernv/opal-sysparam.c
+++ b/arch/powerpc/platforms/powernv/opal-sysparam.c
@@ -64,7 +64,7 @@ static int opal_get_sys_param(u32 param_
 		goto out_token;
 	}
 
-	ret = msg.params[1];
+	ret = be64_to_cpu(msg.params[1]);
 
 out_token:
 	opal_async_release_token(token);
@@ -98,7 +98,7 @@ static int opal_set_sys_param(u32 param_
 		goto out_token;
 	}
 
-	ret = msg.params[1];
+	ret = be64_to_cpu(msg.params[1]);
 
 out_token:
 	opal_async_release_token(token);
Index: b/arch/powerpc/platforms/powernv/opal.c
===================================================================
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -289,6 +289,7 @@ static void opal_handle_message(void)
 	 * value in /proc/device-tree.
 	 */
 	static struct opal_msg msg;
+	u32 type;
 
 	ret = opal_get_msg(__pa(&msg), sizeof(msg));
 	/* No opal message pending. */
@@ -302,13 +303,14 @@ static void opal_handle_message(void)
 		return;
 	}
 
+	type = be32_to_cpu(msg.msg_type);
+
 	/* Sanity check */
-	if (msg.msg_type > OPAL_MSG_TYPE_MAX) {
-		pr_warning("%s: Unknown message type: %u\n",
-				__func__, msg.msg_type);
+	if (type > OPAL_MSG_TYPE_MAX) {
+		pr_warning("%s: Unknown message type: %u\n", __func__, type);
 		return;
 	}
-	opal_message_do_notify(msg.msg_type, (void *)&msg);
+	opal_message_do_notify(type, (void *)&msg);
 }
 
 static int opal_message_notify(struct notifier_block *nb,

[PATCH 2/2] powerpc/powernv: Fix endian issues with sensor code

[Anton Blanchard]

One OPAL call and one device tree property needed byte swapping.

Signed-off-by: Anton Blanchard <anton@samba.org>
---

Index: b/arch/powerpc/platforms/powernv/opal-sensor.c
===================================================================
--- a/arch/powerpc/platforms/powernv/opal-sensor.c
+++ b/arch/powerpc/platforms/powernv/opal-sensor.c
@@ -33,6 +33,7 @@ int opal_get_sensor_data(u32 sensor_hndl
 {
 	int ret, token;
 	struct opal_msg msg;
+	__be32 data;
 
 	token = opal_async_get_token_interruptible();
 	if (token < 0) {
@@ -42,7 +43,7 @@ int opal_get_sensor_data(u32 sensor_hndl
 	}
 
 	mutex_lock(&opal_sensor_mutex);
-	ret = opal_sensor_read(sensor_hndl, token, sensor_data);
+	ret = opal_sensor_read(sensor_hndl, token, &data);
 	if (ret != OPAL_ASYNC_COMPLETION)
 		goto out_token;
 
@@ -53,6 +54,7 @@ int opal_get_sensor_data(u32 sensor_hndl
 		goto out_token;
 	}
 
+	*sensor_data = be32_to_cpu(data);
 	ret = be64_to_cpu(msg.params[1]);
 
 out_token:
Index: b/arch/powerpc/include/asm/opal.h
===================================================================
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -880,8 +880,7 @@ int64_t opal_get_param(uint64_t token, u
 		uint64_t length);
 int64_t opal_set_param(uint64_t token, uint32_t param_id, uint64_t buffer,
 		uint64_t length);
-int64_t opal_sensor_read(uint32_t sensor_hndl, int token,
-		uint32_t *sensor_data);
+int64_t opal_sensor_read(uint32_t sensor_hndl, int token, __be32 *sensor_data);
 
 /* Internal functions */
 extern int early_init_dt_scan_opal(unsigned long node, const char *uname,
Index: b/drivers/hwmon/ibmpowernv.c
===================================================================
--- a/drivers/hwmon/ibmpowernv.c
+++ b/drivers/hwmon/ibmpowernv.c
@@ -471,7 +471,7 @@ static int __init powernv_hwmon_init(voi
 	struct device_node *opal, *np = NULL;
 	enum attributes attr_type;
 	enum sensors type;
-	const u32 *sensor_id;
+	u32 sensor_id;
 	u32 sensor_index;
 	int err;
 
@@ -497,14 +497,13 @@ static int __init powernv_hwmon_init(voi
 				&sensor_index))
 			continue;
 
-		sensor_id = of_get_property(np, "sensor-id", NULL);
-		if (!sensor_id) {
+		if (of_property_read_u32(np, "sensor-id", &sensor_id)) {
 			pr_info("%s: %s doesn't have sensor-id\n", __func__,
 					np->name);
 			continue;
 		}
 
-		err = powernv_sensor_init(*sensor_id, np, type, attr_type,
+		err = powernv_sensor_init(sensor_id, np, type, attr_type,
 				sensor_index);
 		if (err) {
 			of_node_put(opal);