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[PATCH v9 1/8] platform/x86: asus-wmi: export symbols used for read/write WMI

Denis Benato posted 8 patches 7 months, 2 weeks ago
There is a newer version of this series
[PATCH v9 1/8] platform/x86: asus-wmi: export symbols used for read/write WMI
Posted by Denis Benato 7 months, 2 weeks ago 
From: "Luke D. Jones" <luke@ljones.dev>

Export symbols for reading/writing WMI symbols using a namespace.
Existing functions:
- asus_wmi_evaluate_method
- asus_wmi_set_devstate
New function:
- asus_wmi_get_devstate_dsts

The new function is intended for use with DSTS WMI method only and
avoids requiring the asus_wmi driver data to select the WMI method.

Signed-off-by: Denis Benato <benato.denis96@gmail.com>
Signed-off-by: Luke D. Jones <luke@ljones.dev>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
---
 drivers/platform/x86/asus-wmi.c            | 40 ++++++++++++++++++++--
 include/linux/platform_data/x86/asus-wmi.h |  9 +++++
 2 files changed, 46 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index f7191fdded14..e31e0264a160 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -390,7 +390,7 @@ int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1, u32 *retval)
 {
 	return asus_wmi_evaluate_method3(method_id, arg0, arg1, 0, retval);
 }
-EXPORT_SYMBOL_GPL(asus_wmi_evaluate_method);
+EXPORT_SYMBOL_NS_GPL(asus_wmi_evaluate_method, "ASUS_WMI");
 
 static int asus_wmi_evaluate_method5(u32 method_id,
 		u32 arg0, u32 arg1, u32 arg2, u32 arg3, u32 arg4, u32 *retval)
@@ -554,12 +554,46 @@ static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
 	return 0;
 }
 
-int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
-				 u32 *retval)
+/**
+ * asus_wmi_get_devstate_dsts() - Get the WMI function state.
+ * @dev_id: The WMI method ID to call.
+ * @retval: A pointer to where to store the value returned from WMI.
+ * @return: 0 on success and retval is filled.
+ * @return: -ENODEV if the method ID is unsupported.
+ * @return: everything else is an error from WMI call.
+ */
+int asus_wmi_get_devstate_dsts(u32 dev_id, u32 *retval)
+{
+	int err;
+
+	err = asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, dev_id, 0, retval);
+	if (err)
+		return err;
+
+	if (*retval == ASUS_WMI_UNSUPPORTED_METHOD)
+		return -ENODEV;
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(asus_wmi_get_devstate_dsts, "ASUS_WMI");
+
+/**
+ * asus_wmi_set_devstate() - Set the WMI function state.
+ * @dev_id: The WMI function to call.
+ * @ctrl_param: The argument to be used for this WMI function.
+ * @retval: A pointer to where to store the value returned from WMI.
+ * @return: 0 on success and retval is filled.
+ * @return: everything else is an error from WMI call.
+ *
+ * A asus_wmi_set_devstate() call must be paired with a
+ * asus_wmi_get_devstate_dsts() to check if the WMI function is supported.
+ */
+int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, u32 *retval)
 {
 	return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
 					ctrl_param, retval);
 }
+EXPORT_SYMBOL_NS_GPL(asus_wmi_set_devstate, "ASUS_WMI");
 
 /* Helper for special devices with magic return codes */
 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
index 8a515179113d..b6f15b3d0959 100644
--- a/include/linux/platform_data/x86/asus-wmi.h
+++ b/include/linux/platform_data/x86/asus-wmi.h
@@ -166,6 +166,7 @@ enum asus_ally_mcu_hack {
 #if IS_REACHABLE(CONFIG_ASUS_WMI)
 void set_ally_mcu_hack(enum asus_ally_mcu_hack status);
 void set_ally_mcu_powersave(bool enabled);
+int asus_wmi_get_devstate_dsts(u32 dev_id, u32 *retval);
 int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, u32 *retval);
 int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1, u32 *retval);
 #else
@@ -179,6 +180,14 @@ static inline int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, u32 *retval)
 {
 	return -ENODEV;
 }
+static inline int asus_wmi_get_devstate_dsts(u32 dev_id, u32 *retval)
+{
+	return -ENODEV;
+}
+static inline int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, u32 *retval)
+{
+	return -ENODEV;
+}
 static inline int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
 					   u32 *retval)
 {
-- 
2.50.0
Re: [PATCH v9 1/8] platform/x86: asus-wmi: export symbols used for read/write WMI
Posted by kernel test robot 7 months, 2 weeks ago 
Hi Denis,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on v6.16-rc3 next-20250627]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Denis-Benato/platform-x86-asus-wmi-export-symbols-used-for-read-write-WMI/20250629-211651
base:   linus/master
patch link:    https://lore.kernel.org/r/20250629131423.9013-2-benato.denis96%40gmail.com
patch subject: [PATCH v9 1/8] platform/x86: asus-wmi: export symbols used for read/write WMI
config: arc-randconfig-002-20250629 (https://download.01.org/0day-ci/archive/20250630/202506300004.OWO7f60c-lkp@intel.com/config)
compiler: arc-linux-gcc (GCC) 13.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250630/202506300004.OWO7f60c-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506300004.OWO7f60c-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/hid/hid-asus.c:29:
>> include/linux/platform_data/x86/asus-wmi.h:187:19: error: redefinition of 'asus_wmi_set_devstate'
     187 | static inline int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, u32 *retval)
         |                   ^~~~~~~~~~~~~~~~~~~~~
   include/linux/platform_data/x86/asus-wmi.h:179:19: note: previous definition of 'asus_wmi_set_devstate' with type 'int(u32,  u32,  u32 *)' {aka 'int(unsigned int,  unsigned int,  unsigned int *)'}
     179 | static inline int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, u32 *retval)
         |                   ^~~~~~~~~~~~~~~~~~~~~


vim +/asus_wmi_set_devstate +187 include/linux/platform_data/x86/asus-wmi.h

   165	
   166	#if IS_REACHABLE(CONFIG_ASUS_WMI)
   167	void set_ally_mcu_hack(enum asus_ally_mcu_hack status);
   168	void set_ally_mcu_powersave(bool enabled);
   169	int asus_wmi_get_devstate_dsts(u32 dev_id, u32 *retval);
   170	int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, u32 *retval);
   171	int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1, u32 *retval);
   172	#else
   173	static inline void set_ally_mcu_hack(enum asus_ally_mcu_hack status)
   174	{
   175	}
   176	static inline void set_ally_mcu_powersave(bool enabled)
   177	{
   178	}
   179	static inline int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, u32 *retval)
   180	{
   181		return -ENODEV;
   182	}
   183	static inline int asus_wmi_get_devstate_dsts(u32 dev_id, u32 *retval)
   184	{
   185		return -ENODEV;
   186	}
 > 187	static inline int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, u32 *retval)
   188	{
   189		return -ENODEV;
   190	}
   191	static inline int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
   192						   u32 *retval)
   193	{
   194		return -ENODEV;
   195	}
   196	#endif
   197	

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