3  * Generic Counter sysfs interface
6 #include <linux/counter.h>
20 #include "counter-sysfs.h"
28  * struct counter_attribute - Counter sysfs attribute
30  * @l:		node to add Counter attribute to attribute group list
31  * @comp:	Counter component callbacks and data
32  * @scope:	Counter scope of the attribute
109 	struct counter_device *const counter = counter_from_dev(dev);  in counter_comp_u8_show()  local
115 		err = a->comp.device_u8_read(counter, &data);  in counter_comp_u8_show()
118 		err = a->comp.signal_u8_read(counter, a->parent, &data);  in counter_comp_u8_show()
121 		err = a->comp.count_u8_read(counter, a->parent, &data);  in counter_comp_u8_show()
141 	struct counter_device *const counter = counter_from_dev(dev);  in counter_comp_u8_store()  local
156 		err = a->comp.device_u8_write(counter, data);  in counter_comp_u8_store()
159 		err = a->comp.signal_u8_write(counter, a->parent, data);  in counter_comp_u8_store()
162 		err = a->comp.count_u8_write(counter, a->parent, data);  in counter_comp_u8_store()
177 	struct counter_device *const counter = counter_from_dev(dev);  in counter_comp_u32_show()  local
184 		err = a->comp.device_u32_read(counter, &data);  in counter_comp_u32_show()
187 		err = a->comp.signal_u32_read(counter, a->parent, &data);  in counter_comp_u32_show()
191 			err = a->comp.action_read(counter, a->parent,  in counter_comp_u32_show()
194 			err = a->comp.count_u32_read(counter, a->parent, &data);  in counter_comp_u32_show()
242 	struct counter_device *const counter = counter_from_dev(dev);  in counter_comp_u32_store()  local
281 		err = a->comp.device_u32_write(counter, data);  in counter_comp_u32_store()
284 		err = a->comp.signal_u32_write(counter, a->parent, data);  in counter_comp_u32_store()
288 			err = a->comp.action_write(counter, count, synapse,  in counter_comp_u32_store()
291 			err = a->comp.count_u32_write(counter, count, data);  in counter_comp_u32_store()
306 	struct counter_device *const counter = counter_from_dev(dev);  in counter_comp_u64_show()  local
312 		err = a->comp.device_u64_read(counter, &data);  in counter_comp_u64_show()
315 		err = a->comp.signal_u64_read(counter, a->parent, &data);  in counter_comp_u64_show()
318 		err = a->comp.count_u64_read(counter, a->parent, &data);  in counter_comp_u64_show()
334 	struct counter_device *const counter = counter_from_dev(dev);  in counter_comp_u64_store()  local
344 		err = a->comp.device_u64_write(counter, data);  in counter_comp_u64_store()
347 		err = a->comp.signal_u64_write(counter, a->parent, data);  in counter_comp_u64_store()
350 		err = a->comp.count_u64_write(counter, a->parent, data);  in counter_comp_u64_store()
366 	struct counter_device *const counter = counter_from_dev(dev);  in counter_comp_array_u32_show()  local
375 	err = a->comp.signal_array_u32_read(counter, a->parent, element->idx,  in counter_comp_array_u32_show()
388 	struct counter_device *const counter = counter_from_dev(dev);  in counter_comp_array_u32_store()  local
403 	err = a->comp.signal_array_u32_write(counter, a->parent, element->idx,  in counter_comp_array_u32_store()
416 	struct counter_device *const counter = counter_from_dev(dev);  in counter_comp_array_u64_show()  local
423 		err = a->comp.device_array_u64_read(counter, element->idx,  in counter_comp_array_u64_show()
427 		err = a->comp.signal_array_u64_read(counter, a->parent,  in counter_comp_array_u64_show()
431 		err = a->comp.count_array_u64_read(counter, a->parent,  in counter_comp_array_u64_show()
448 	struct counter_device *const counter = counter_from_dev(dev);  in counter_comp_array_u64_store()  local
459 		err = a->comp.device_array_u64_write(counter, element->idx,  in counter_comp_array_u64_store()
463 		err = a->comp.signal_array_u64_write(counter, a->parent,  in counter_comp_array_u64_store()
467 		err = a->comp.count_array_u64_write(counter, a->parent,  in counter_comp_array_u64_store()
543 	/* Configure Counter attribute */  in counter_avail_attr_create()
581 	/* Configure Counter attribute */  in counter_attr_create()
690 	/* Configure Counter attribute */  in counter_name_attr_create()
720 	/* Allocate Counter attribute */  in counter_comp_id_attr_create()
730 	/* Configure Counter attribute */  in counter_comp_id_attr_create()
840 static int counter_signal_attrs_create(struct counter_device *const counter,  in counter_signal_attrs_create()  argument
845 	struct device *const dev = &counter->dev;  in counter_signal_attrs_create()
851 	comp.signal_u32_read = counter->ops->signal_read;  in counter_signal_attrs_create()
866 static int counter_sysfs_signals_add(struct counter_device *const counter,  in counter_sysfs_signals_add()  argument
873 	for (i = 0; i < counter->num_signals; i++) {  in counter_sysfs_signals_add()
875 		groups[i].name = devm_kasprintf(&counter->dev, GFP_KERNEL,  in counter_sysfs_signals_add()
881 		err = counter_signal_attrs_create(counter, groups + i,  in counter_sysfs_signals_add()
882 						  counter->signals + i);  in counter_sysfs_signals_add()
890 static int counter_sysfs_synapses_add(struct counter_device *const counter,  in counter_sysfs_synapses_add()  argument
898 		struct device *const dev = &counter->dev;  in counter_sysfs_synapses_add()
907 		id = synapse->signal - counter->signals;  in counter_sysfs_synapses_add()
915 		comp.action_read = counter->ops->action_read;  in counter_sysfs_synapses_add()
916 		comp.action_write = counter->ops->action_write;  in counter_sysfs_synapses_add()
940 static int counter_count_attrs_create(struct counter_device *const counter,  in counter_count_attrs_create()  argument
945 	struct device *const dev = &counter->dev;  in counter_count_attrs_create()
951 	comp.count_u64_read = counter->ops->count_read;  in counter_count_attrs_create()
952 	comp.count_u64_write = counter->ops->count_write;  in counter_count_attrs_create()
964 	comp.count_u32_read = counter->ops->function_read;  in counter_count_attrs_create()
965 	comp.count_u32_write = counter->ops->function_write;  in counter_count_attrs_create()
975 static int counter_sysfs_counts_add(struct counter_device *const counter,  in counter_sysfs_counts_add()  argument
983 	for (i = 0; i < counter->num_counts; i++) {  in counter_sysfs_counts_add()
984 		count = counter->counts + i;  in counter_sysfs_counts_add()
987 		groups[i].name = devm_kasprintf(&counter->dev, GFP_KERNEL,  in counter_sysfs_counts_add()
993 		err = counter_sysfs_synapses_add(counter, groups + i, count);  in counter_sysfs_counts_add()
998 		err = counter_count_attrs_create(counter, groups + i, count);  in counter_sysfs_counts_add()
1006 static int counter_num_signals_read(struct counter_device *counter, u8 *val)  in counter_num_signals_read()  argument
1008 	*val = counter->num_signals;  in counter_num_signals_read()
1012 static int counter_num_counts_read(struct counter_device *counter, u8 *val)  in counter_num_counts_read()  argument
1014 	*val = counter->num_counts;  in counter_num_counts_read()
1018 static int counter_events_queue_size_read(struct counter_device *counter,  in counter_events_queue_size_read()  argument
1021 	*val = kfifo_size(&counter->events);  in counter_events_queue_size_read()
1025 static int counter_events_queue_size_write(struct counter_device *counter,  in counter_events_queue_size_write()  argument
1038 	mutex_lock(&counter->events_out_lock);  in counter_events_queue_size_write()
1039 	spin_lock_irqsave(&counter->events_in_lock, flags);  in counter_events_queue_size_write()
1040 	kfifo_free(&counter->events);  in counter_events_queue_size_write()
1041 	counter->events.kfifo = events.kfifo;  in counter_events_queue_size_write()
1042 	spin_unlock_irqrestore(&counter->events_in_lock, flags);  in counter_events_queue_size_write()
1043 	mutex_unlock(&counter->events_out_lock);  in counter_events_queue_size_write()
1059 static int counter_sysfs_attr_add(struct counter_device *const counter,  in counter_sysfs_attr_add()  argument
1063 	struct device *const dev = &counter->dev;  in counter_sysfs_attr_add()
1067 	err = counter_sysfs_signals_add(counter, cattr_group);  in counter_sysfs_attr_add()
1070 	cattr_group += counter->num_signals;  in counter_sysfs_attr_add()
1073 	err = counter_sysfs_counts_add(counter, cattr_group);  in counter_sysfs_attr_add()
1076 	cattr_group += counter->num_counts;  in counter_sysfs_attr_add()
1079 	err = counter_name_attr_create(dev, cattr_group, counter->name);  in counter_sysfs_attr_add()
1102 	return counter_sysfs_exts_add(dev, cattr_group, counter->ext,  in counter_sysfs_attr_add()
1103 				      counter->num_ext, scope, NULL);  in counter_sysfs_attr_add()
1109  * counter_sysfs_add - Adds Counter sysfs attributes to the device structure
1110  * @counter:	Pointer to the Counter device structure
1112  * Counter sysfs attributes are created and added to the respective device
1118 int counter_sysfs_add(struct counter_device *const counter)  in counter_sysfs_add()  argument
1120 	struct device *const dev = &counter->dev;  in counter_sysfs_add()
1121 	const size_t num_groups = counter->num_signals + counter->num_counts + 1;  in counter_sysfs_add()
1138 	/* Add Counter device sysfs attributes */  in counter_sysfs_add()
1139 	err = counter_sysfs_attr_add(counter, cattr_groups);  in counter_sysfs_add()