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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 | // SPDX-License-Identifier: GPL-2.0 /* * Intel Uncore Frequency Control: Common code implementation * Copyright (c) 2022, Intel Corporation. * All rights reserved. * */ #include <linux/cpu.h> #include <linux/module.h> #include "uncore-frequency-common.h" /* Mutex to control all mutual exclusions */ static DEFINE_MUTEX(uncore_lock); /* Root of the all uncore sysfs kobjs */ static struct kobject *uncore_root_kobj; /* uncore instance count */ static int uncore_instance_count; static DEFINE_IDA(intel_uncore_ida); /* callbacks for actual HW read/write */ static int (*uncore_read)(struct uncore_data *data, unsigned int *min, unsigned int *max); static int (*uncore_write)(struct uncore_data *data, unsigned int input, unsigned int min_max); static int (*uncore_read_freq)(struct uncore_data *data, unsigned int *freq); static ssize_t show_domain_id(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { struct uncore_data *data = container_of(attr, struct uncore_data, domain_id_kobj_attr); return sprintf(buf, "%u\n", data->domain_id); } static ssize_t show_fabric_cluster_id(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { struct uncore_data *data = container_of(attr, struct uncore_data, fabric_cluster_id_kobj_attr); return sprintf(buf, "%u\n", data->cluster_id); } static ssize_t show_package_id(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { struct uncore_data *data = container_of(attr, struct uncore_data, package_id_kobj_attr); return sprintf(buf, "%u\n", data->package_id); } static ssize_t show_min_max_freq_khz(struct uncore_data *data, char *buf, int min_max) { unsigned int min, max; int ret; mutex_lock(&uncore_lock); ret = uncore_read(data, &min, &max); mutex_unlock(&uncore_lock); if (ret) return ret; if (min_max) return sprintf(buf, "%u\n", max); return sprintf(buf, "%u\n", min); } static ssize_t store_min_max_freq_khz(struct uncore_data *data, const char *buf, ssize_t count, int min_max) { unsigned int input; int ret; if (kstrtouint(buf, 10, &input)) return -EINVAL; mutex_lock(&uncore_lock); ret = uncore_write(data, input, min_max); mutex_unlock(&uncore_lock); if (ret) return ret; return count; } static ssize_t show_perf_status_freq_khz(struct uncore_data *data, char *buf) { unsigned int freq; int ret; mutex_lock(&uncore_lock); ret = uncore_read_freq(data, &freq); mutex_unlock(&uncore_lock); if (ret) return ret; return sprintf(buf, "%u\n", freq); } #define store_uncore_min_max(name, min_max) \ static ssize_t store_##name(struct kobject *kobj, \ struct kobj_attribute *attr, \ const char *buf, size_t count) \ { \ struct uncore_data *data = container_of(attr, struct uncore_data, name##_kobj_attr);\ \ return store_min_max_freq_khz(data, buf, count, \ min_max); \ } #define show_uncore_min_max(name, min_max) \ static ssize_t show_##name(struct kobject *kobj, \ struct kobj_attribute *attr, char *buf)\ { \ struct uncore_data *data = container_of(attr, struct uncore_data, name##_kobj_attr);\ \ return show_min_max_freq_khz(data, buf, min_max); \ } #define show_uncore_perf_status(name) \ static ssize_t show_##name(struct kobject *kobj, \ struct kobj_attribute *attr, char *buf)\ { \ struct uncore_data *data = container_of(attr, struct uncore_data, name##_kobj_attr);\ \ return show_perf_status_freq_khz(data, buf); \ } store_uncore_min_max(min_freq_khz, 0); store_uncore_min_max(max_freq_khz, 1); show_uncore_min_max(min_freq_khz, 0); show_uncore_min_max(max_freq_khz, 1); show_uncore_perf_status(current_freq_khz); #define show_uncore_data(member_name) \ static ssize_t show_##member_name(struct kobject *kobj, \ struct kobj_attribute *attr, char *buf)\ { \ struct uncore_data *data = container_of(attr, struct uncore_data,\ member_name##_kobj_attr);\ \ return sysfs_emit(buf, "%u\n", \ data->member_name); \ } \ show_uncore_data(initial_min_freq_khz); show_uncore_data(initial_max_freq_khz); #define init_attribute_rw(_name) \ do { \ sysfs_attr_init(&data->_name##_kobj_attr.attr); \ data->_name##_kobj_attr.show = show_##_name; \ data->_name##_kobj_attr.store = store_##_name; \ data->_name##_kobj_attr.attr.name = #_name; \ data->_name##_kobj_attr.attr.mode = 0644; \ } while (0) #define init_attribute_ro(_name) \ do { \ sysfs_attr_init(&data->_name##_kobj_attr.attr); \ data->_name##_kobj_attr.show = show_##_name; \ data->_name##_kobj_attr.store = NULL; \ data->_name##_kobj_attr.attr.name = #_name; \ data->_name##_kobj_attr.attr.mode = 0444; \ } while (0) #define init_attribute_root_ro(_name) \ do { \ sysfs_attr_init(&data->_name##_kobj_attr.attr); \ data->_name##_kobj_attr.show = show_##_name; \ data->_name##_kobj_attr.store = NULL; \ data->_name##_kobj_attr.attr.name = #_name; \ data->_name##_kobj_attr.attr.mode = 0400; \ } while (0) static int create_attr_group(struct uncore_data *data, char *name) { int ret, freq, index = 0; init_attribute_rw(max_freq_khz); init_attribute_rw(min_freq_khz); init_attribute_ro(initial_min_freq_khz); init_attribute_ro(initial_max_freq_khz); init_attribute_root_ro(current_freq_khz); if (data->domain_id != UNCORE_DOMAIN_ID_INVALID) { init_attribute_root_ro(domain_id); data->uncore_attrs[index++] = &data->domain_id_kobj_attr.attr; init_attribute_root_ro(fabric_cluster_id); data->uncore_attrs[index++] = &data->fabric_cluster_id_kobj_attr.attr; init_attribute_root_ro(package_id); data->uncore_attrs[index++] = &data->package_id_kobj_attr.attr; } data->uncore_attrs[index++] = &data->max_freq_khz_kobj_attr.attr; data->uncore_attrs[index++] = &data->min_freq_khz_kobj_attr.attr; data->uncore_attrs[index++] = &data->initial_min_freq_khz_kobj_attr.attr; data->uncore_attrs[index++] = &data->initial_max_freq_khz_kobj_attr.attr; ret = uncore_read_freq(data, &freq); if (!ret) data->uncore_attrs[index++] = &data->current_freq_khz_kobj_attr.attr; data->uncore_attrs[index] = NULL; data->uncore_attr_group.name = name; data->uncore_attr_group.attrs = data->uncore_attrs; ret = sysfs_create_group(uncore_root_kobj, &data->uncore_attr_group); return ret; } static void delete_attr_group(struct uncore_data *data, char *name) { sysfs_remove_group(uncore_root_kobj, &data->uncore_attr_group); } int uncore_freq_add_entry(struct uncore_data *data, int cpu) { int ret = 0; mutex_lock(&uncore_lock); if (data->valid) { /* control cpu changed */ data->control_cpu = cpu; goto uncore_unlock; } if (data->domain_id != UNCORE_DOMAIN_ID_INVALID) { ret = ida_alloc(&intel_uncore_ida, GFP_KERNEL); if (ret < 0) goto uncore_unlock; data->instance_id = ret; sprintf(data->name, "uncore%02d", ret); } else { sprintf(data->name, "package_%02d_die_%02d", data->package_id, data->die_id); } uncore_read(data, &data->initial_min_freq_khz, &data->initial_max_freq_khz); ret = create_attr_group(data, data->name); if (ret) { if (data->domain_id != UNCORE_DOMAIN_ID_INVALID) ida_free(&intel_uncore_ida, data->instance_id); } else { data->control_cpu = cpu; data->valid = true; } uncore_unlock: mutex_unlock(&uncore_lock); return ret; } EXPORT_SYMBOL_NS_GPL(uncore_freq_add_entry, INTEL_UNCORE_FREQUENCY); void uncore_freq_remove_die_entry(struct uncore_data *data) { mutex_lock(&uncore_lock); delete_attr_group(data, data->name); data->control_cpu = -1; data->valid = false; if (data->domain_id != UNCORE_DOMAIN_ID_INVALID) ida_free(&intel_uncore_ida, data->instance_id); mutex_unlock(&uncore_lock); } EXPORT_SYMBOL_NS_GPL(uncore_freq_remove_die_entry, INTEL_UNCORE_FREQUENCY); int uncore_freq_common_init(int (*read_control_freq)(struct uncore_data *data, unsigned int *min, unsigned int *max), int (*write_control_freq)(struct uncore_data *data, unsigned int input, unsigned int set_max), int (*read_freq)(struct uncore_data *data, unsigned int *freq)) { mutex_lock(&uncore_lock); uncore_read = read_control_freq; uncore_write = write_control_freq; uncore_read_freq = read_freq; if (!uncore_root_kobj) { struct device *dev_root = bus_get_dev_root(&cpu_subsys); if (dev_root) { uncore_root_kobj = kobject_create_and_add("intel_uncore_frequency", &dev_root->kobj); put_device(dev_root); } } if (uncore_root_kobj) ++uncore_instance_count; mutex_unlock(&uncore_lock); return uncore_root_kobj ? 0 : -ENOMEM; } EXPORT_SYMBOL_NS_GPL(uncore_freq_common_init, INTEL_UNCORE_FREQUENCY); void uncore_freq_common_exit(void) { mutex_lock(&uncore_lock); --uncore_instance_count; if (!uncore_instance_count) { kobject_put(uncore_root_kobj); uncore_root_kobj = NULL; } mutex_unlock(&uncore_lock); } EXPORT_SYMBOL_NS_GPL(uncore_freq_common_exit, INTEL_UNCORE_FREQUENCY); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("Intel Uncore Frequency Common Module"); |