1*f1e1ea51SMario Limonciello // SPDX-License-Identifier: GPL-2.0 2*f1e1ea51SMario Limonciello /* 3*f1e1ea51SMario Limonciello * Functions corresponding to integer type attributes under BIOS Integer GUID for use with 4*f1e1ea51SMario Limonciello * dell-wmi-sysman 5*f1e1ea51SMario Limonciello * 6*f1e1ea51SMario Limonciello * Copyright (c) 2020 Dell Inc. 7*f1e1ea51SMario Limonciello */ 8*f1e1ea51SMario Limonciello 9*f1e1ea51SMario Limonciello #include "dell-wmi-sysman.h" 10*f1e1ea51SMario Limonciello 11*f1e1ea51SMario Limonciello enum int_properties {MIN_VALUE = 6, MAX_VALUE, SCALAR_INCR}; 12*f1e1ea51SMario Limonciello 13*f1e1ea51SMario Limonciello get_instance_id(integer); 14*f1e1ea51SMario Limonciello 15*f1e1ea51SMario Limonciello static ssize_t current_value_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) 16*f1e1ea51SMario Limonciello { 17*f1e1ea51SMario Limonciello int instance_id = get_integer_instance_id(kobj); 18*f1e1ea51SMario Limonciello union acpi_object *obj; 19*f1e1ea51SMario Limonciello ssize_t ret; 20*f1e1ea51SMario Limonciello 21*f1e1ea51SMario Limonciello if (instance_id < 0) 22*f1e1ea51SMario Limonciello return instance_id; 23*f1e1ea51SMario Limonciello 24*f1e1ea51SMario Limonciello /* need to use specific instance_id and guid combination to get right data */ 25*f1e1ea51SMario Limonciello obj = get_wmiobj_pointer(instance_id, DELL_WMI_BIOS_INTEGER_ATTRIBUTE_GUID); 26*f1e1ea51SMario Limonciello if (!obj) 27*f1e1ea51SMario Limonciello return -EIO; 28*f1e1ea51SMario Limonciello if (obj->package.elements[CURRENT_VAL].type != ACPI_TYPE_INTEGER) { 29*f1e1ea51SMario Limonciello kfree(obj); 30*f1e1ea51SMario Limonciello return -EINVAL; 31*f1e1ea51SMario Limonciello } 32*f1e1ea51SMario Limonciello ret = snprintf(buf, PAGE_SIZE, "%lld\n", obj->package.elements[CURRENT_VAL].integer.value); 33*f1e1ea51SMario Limonciello kfree(obj); 34*f1e1ea51SMario Limonciello return ret; 35*f1e1ea51SMario Limonciello } 36*f1e1ea51SMario Limonciello 37*f1e1ea51SMario Limonciello /** 38*f1e1ea51SMario Limonciello * validate_integer_input() - Validate input of current_value against lower and upper bound 39*f1e1ea51SMario Limonciello * @instance_id: The instance on which input is validated 40*f1e1ea51SMario Limonciello * @buf: Input value 41*f1e1ea51SMario Limonciello */ 42*f1e1ea51SMario Limonciello static int validate_integer_input(int instance_id, char *buf) 43*f1e1ea51SMario Limonciello { 44*f1e1ea51SMario Limonciello int in_val; 45*f1e1ea51SMario Limonciello int ret; 46*f1e1ea51SMario Limonciello 47*f1e1ea51SMario Limonciello ret = kstrtoint(buf, 0, &in_val); 48*f1e1ea51SMario Limonciello if (ret) 49*f1e1ea51SMario Limonciello return ret; 50*f1e1ea51SMario Limonciello if (in_val < wmi_priv.integer_data[instance_id].min_value || 51*f1e1ea51SMario Limonciello in_val > wmi_priv.integer_data[instance_id].max_value) 52*f1e1ea51SMario Limonciello return -EINVAL; 53*f1e1ea51SMario Limonciello 54*f1e1ea51SMario Limonciello /* workaround for BIOS error. 55*f1e1ea51SMario Limonciello * validate input to avoid setting 0 when integer input passed with + sign 56*f1e1ea51SMario Limonciello */ 57*f1e1ea51SMario Limonciello if (*buf == '+') 58*f1e1ea51SMario Limonciello memmove(buf, (buf + 1), strlen(buf + 1) + 1); 59*f1e1ea51SMario Limonciello 60*f1e1ea51SMario Limonciello return ret; 61*f1e1ea51SMario Limonciello } 62*f1e1ea51SMario Limonciello 63*f1e1ea51SMario Limonciello attribute_s_property_show(display_name_language_code, integer); 64*f1e1ea51SMario Limonciello static struct kobj_attribute integer_displ_langcode = 65*f1e1ea51SMario Limonciello __ATTR_RO(display_name_language_code); 66*f1e1ea51SMario Limonciello 67*f1e1ea51SMario Limonciello attribute_s_property_show(display_name, integer); 68*f1e1ea51SMario Limonciello static struct kobj_attribute integer_displ_name = 69*f1e1ea51SMario Limonciello __ATTR_RO(display_name); 70*f1e1ea51SMario Limonciello 71*f1e1ea51SMario Limonciello attribute_n_property_show(default_value, integer); 72*f1e1ea51SMario Limonciello static struct kobj_attribute integer_default_val = 73*f1e1ea51SMario Limonciello __ATTR_RO(default_value); 74*f1e1ea51SMario Limonciello 75*f1e1ea51SMario Limonciello attribute_property_store(current_value, integer); 76*f1e1ea51SMario Limonciello static struct kobj_attribute integer_current_val = 77*f1e1ea51SMario Limonciello __ATTR_RW_MODE(current_value, 0600); 78*f1e1ea51SMario Limonciello 79*f1e1ea51SMario Limonciello attribute_s_property_show(dell_modifier, integer); 80*f1e1ea51SMario Limonciello static struct kobj_attribute integer_modifier = 81*f1e1ea51SMario Limonciello __ATTR_RO(dell_modifier); 82*f1e1ea51SMario Limonciello 83*f1e1ea51SMario Limonciello attribute_n_property_show(min_value, integer); 84*f1e1ea51SMario Limonciello static struct kobj_attribute integer_lower_bound = 85*f1e1ea51SMario Limonciello __ATTR_RO(min_value); 86*f1e1ea51SMario Limonciello 87*f1e1ea51SMario Limonciello attribute_n_property_show(max_value, integer); 88*f1e1ea51SMario Limonciello static struct kobj_attribute integer_upper_bound = 89*f1e1ea51SMario Limonciello __ATTR_RO(max_value); 90*f1e1ea51SMario Limonciello 91*f1e1ea51SMario Limonciello attribute_n_property_show(scalar_increment, integer); 92*f1e1ea51SMario Limonciello static struct kobj_attribute integer_scalar_increment = 93*f1e1ea51SMario Limonciello __ATTR_RO(scalar_increment); 94*f1e1ea51SMario Limonciello 95*f1e1ea51SMario Limonciello static ssize_t type_show(struct kobject *kobj, struct kobj_attribute *attr, 96*f1e1ea51SMario Limonciello char *buf) 97*f1e1ea51SMario Limonciello { 98*f1e1ea51SMario Limonciello return sprintf(buf, "integer\n"); 99*f1e1ea51SMario Limonciello } 100*f1e1ea51SMario Limonciello static struct kobj_attribute integer_type = 101*f1e1ea51SMario Limonciello __ATTR_RO(type); 102*f1e1ea51SMario Limonciello 103*f1e1ea51SMario Limonciello static struct attribute *integer_attrs[] = { 104*f1e1ea51SMario Limonciello &integer_displ_langcode.attr, 105*f1e1ea51SMario Limonciello &integer_displ_name.attr, 106*f1e1ea51SMario Limonciello &integer_default_val.attr, 107*f1e1ea51SMario Limonciello &integer_current_val.attr, 108*f1e1ea51SMario Limonciello &integer_modifier.attr, 109*f1e1ea51SMario Limonciello &integer_lower_bound.attr, 110*f1e1ea51SMario Limonciello &integer_upper_bound.attr, 111*f1e1ea51SMario Limonciello &integer_scalar_increment.attr, 112*f1e1ea51SMario Limonciello &integer_type.attr, 113*f1e1ea51SMario Limonciello NULL, 114*f1e1ea51SMario Limonciello }; 115*f1e1ea51SMario Limonciello 116*f1e1ea51SMario Limonciello static const struct attribute_group integer_attr_group = { 117*f1e1ea51SMario Limonciello .attrs = integer_attrs, 118*f1e1ea51SMario Limonciello }; 119*f1e1ea51SMario Limonciello 120*f1e1ea51SMario Limonciello int alloc_int_data(void) 121*f1e1ea51SMario Limonciello { 122*f1e1ea51SMario Limonciello int ret = 0; 123*f1e1ea51SMario Limonciello 124*f1e1ea51SMario Limonciello wmi_priv.integer_instances_count = get_instance_count(DELL_WMI_BIOS_INTEGER_ATTRIBUTE_GUID); 125*f1e1ea51SMario Limonciello wmi_priv.integer_data = kcalloc(wmi_priv.integer_instances_count, 126*f1e1ea51SMario Limonciello sizeof(struct integer_data), GFP_KERNEL); 127*f1e1ea51SMario Limonciello if (!wmi_priv.integer_data) { 128*f1e1ea51SMario Limonciello wmi_priv.integer_instances_count = 0; 129*f1e1ea51SMario Limonciello ret = -ENOMEM; 130*f1e1ea51SMario Limonciello } 131*f1e1ea51SMario Limonciello return ret; 132*f1e1ea51SMario Limonciello } 133*f1e1ea51SMario Limonciello 134*f1e1ea51SMario Limonciello /** 135*f1e1ea51SMario Limonciello * populate_int_data() - Populate all properties of an instance under integer attribute 136*f1e1ea51SMario Limonciello * @integer_obj: ACPI object with integer data 137*f1e1ea51SMario Limonciello * @instance_id: The instance to enumerate 138*f1e1ea51SMario Limonciello * @attr_name_kobj: The parent kernel object 139*f1e1ea51SMario Limonciello */ 140*f1e1ea51SMario Limonciello int populate_int_data(union acpi_object *integer_obj, int instance_id, 141*f1e1ea51SMario Limonciello struct kobject *attr_name_kobj) 142*f1e1ea51SMario Limonciello { 143*f1e1ea51SMario Limonciello wmi_priv.integer_data[instance_id].attr_name_kobj = attr_name_kobj; 144*f1e1ea51SMario Limonciello strlcpy_attr(wmi_priv.integer_data[instance_id].attribute_name, 145*f1e1ea51SMario Limonciello integer_obj[ATTR_NAME].string.pointer); 146*f1e1ea51SMario Limonciello strlcpy_attr(wmi_priv.integer_data[instance_id].display_name_language_code, 147*f1e1ea51SMario Limonciello integer_obj[DISPL_NAME_LANG_CODE].string.pointer); 148*f1e1ea51SMario Limonciello strlcpy_attr(wmi_priv.integer_data[instance_id].display_name, 149*f1e1ea51SMario Limonciello integer_obj[DISPLAY_NAME].string.pointer); 150*f1e1ea51SMario Limonciello wmi_priv.integer_data[instance_id].default_value = 151*f1e1ea51SMario Limonciello (uintptr_t)integer_obj[DEFAULT_VAL].string.pointer; 152*f1e1ea51SMario Limonciello strlcpy_attr(wmi_priv.integer_data[instance_id].dell_modifier, 153*f1e1ea51SMario Limonciello integer_obj[MODIFIER].string.pointer); 154*f1e1ea51SMario Limonciello wmi_priv.integer_data[instance_id].min_value = 155*f1e1ea51SMario Limonciello (uintptr_t)integer_obj[MIN_VALUE].string.pointer; 156*f1e1ea51SMario Limonciello wmi_priv.integer_data[instance_id].max_value = 157*f1e1ea51SMario Limonciello (uintptr_t)integer_obj[MAX_VALUE].string.pointer; 158*f1e1ea51SMario Limonciello wmi_priv.integer_data[instance_id].scalar_increment = 159*f1e1ea51SMario Limonciello (uintptr_t)integer_obj[SCALAR_INCR].string.pointer; 160*f1e1ea51SMario Limonciello 161*f1e1ea51SMario Limonciello return sysfs_create_group(attr_name_kobj, &integer_attr_group); 162*f1e1ea51SMario Limonciello } 163*f1e1ea51SMario Limonciello 164*f1e1ea51SMario Limonciello /** 165*f1e1ea51SMario Limonciello * exit_int_attributes() - Clear all attribute data 166*f1e1ea51SMario Limonciello * 167*f1e1ea51SMario Limonciello * Clears all data allocated for this group of attributes 168*f1e1ea51SMario Limonciello */ 169*f1e1ea51SMario Limonciello void exit_int_attributes(void) 170*f1e1ea51SMario Limonciello { 171*f1e1ea51SMario Limonciello int instance_id; 172*f1e1ea51SMario Limonciello 173*f1e1ea51SMario Limonciello for (instance_id = 0; instance_id < wmi_priv.integer_instances_count; instance_id++) { 174*f1e1ea51SMario Limonciello if (wmi_priv.integer_data[instance_id].attr_name_kobj) 175*f1e1ea51SMario Limonciello sysfs_remove_group(wmi_priv.integer_data[instance_id].attr_name_kobj, 176*f1e1ea51SMario Limonciello &integer_attr_group); 177*f1e1ea51SMario Limonciello } 178*f1e1ea51SMario Limonciello kfree(wmi_priv.integer_data); 179*f1e1ea51SMario Limonciello } 180