librtas/0007-librtas-Use-dev-papr-indices-when-available-for-set-.patch

From 8a4ddb00328b7cde9ff20d9c321dad1e094128d9 Mon Sep 17 00:00:00 2001
From: Haren Myneni <haren@linux.ibm.com>
Date: Sun, 9 Mar 2025 16:29:13 -0700
Subject: [PATCH 7/9] librtas: Use /dev/papr-indices when available for
 set-dynamic-indicator

Changes for rtas_set_dynamic_indicator() to use new kernel
interface provided by /dev/papr-indices entry. The kernel provides
PAPR_DYNAMIC_INDICATOR_IOC_SET ioctl for /dev/papr-indices to
execute ibm,set-dynamic-indicator RTAS Call.

If /dev/papr-indices entry is available, the new kernel interface
is used with the following programming model:

 fd = open("/dev/papr-indices", O_RDWR);
 copy location-code to
        papr_indices_io_block.dynamic_param.location_code_str
 papr_indices_io_block.dynamic_param.token = token-val;
 papr_indices_io_block.dynamic_param.state = new-state;
 ret = ioctl(fd, PAPR_DYNAMIC_INDICATOR_IOC_SET,
        papr_indices_io_block);

Signed-off-by: Haren Myneni <haren@linux.ibm.com>
---
 librtas_src/indices.c | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/librtas_src/indices.c b/librtas_src/indices.c
index 27d537c..875c576 100644
--- a/librtas_src/indices.c
+++ b/librtas_src/indices.c
@@ -75,7 +75,7 @@ int get_dynamic_sensor_fallback(int sensor, void *loc_code, int *state)
  * @param loc_code
  * @return 0 on success, !0 otherwise
  */
-int rtas_set_dynamic_indicator(int indicator, int new_value, void *loc_code)
+int set_dynamic_indicator_fallback(int indicator, int new_value, void *loc_code)
 {
 	uint32_t loc_pa = 0;
 	void *locbuf;
@@ -296,6 +296,20 @@ static int get_dynamic_sensor_chardev(int sensor, void *loc_code, int *state)
 	return 0;
 }
 
+static int set_dynamic_indicator_chardev(int indicator, int new_value,
+					void *loc_code)
+{
+	struct papr_indices_io_block buf = {};
+	int ret;
+
+	buf.dynamic_param.token = indicator;
+	buf.dynamic_param.state = new_value;
+	ret = dynamic_common_io_setup(PAPR_DYNAMIC_INDICATOR_IOC_SET,
+					loc_code, &buf);
+
+	return ret;
+}
+
 static bool indices_can_use_chardev(void)
 {
 	struct stat statbuf;
@@ -315,6 +329,8 @@ static bool indices_can_use_chardev(void)
 static int (*get_indices_fn)(int is_sensor, int type, char *workarea,
 				size_t size, int start, int *next);
 static int (*get_dynamic_sensor_fn)(int sensor, void *loc_code, int *state);
+static int (*set_dynamic_indicator_fn)(int indicator, int new_value,
+				void *loc_code);
 
 static void indices_fn_setup(void)
 {
@@ -324,6 +340,9 @@ static void indices_fn_setup(void)
 		get_indices_chardev : get_indices_fallback;
 	get_dynamic_sensor_fn = use_chardev ?
 		get_dynamic_sensor_chardev : get_dynamic_sensor_fallback;
+	set_dynamic_indicator_fn = use_chardev ?
+		set_dynamic_indicator_chardev : set_dynamic_indicator_fallback;
+
 }
 
 static pthread_once_t indices_fn_setup_once = PTHREAD_ONCE_INIT;
@@ -341,3 +360,9 @@ int rtas_get_dynamic_sensor(int sensor, void *loc_code, int *state)
 	pthread_once(&indices_fn_setup_once, indices_fn_setup);
 	return get_dynamic_sensor_fn(sensor, loc_code, state);
 }
+
+int rtas_set_dynamic_indicator(int indicator, int new_value, void *loc_code)
+{
+	pthread_once(&indices_fn_setup_once, indices_fn_setup);
+	return set_dynamic_indicator_fn(indicator, new_value, loc_code);
+}
-- 
2.47.1