Loading...
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 | // SPDX-License-Identifier: GPL-2.0+ // Copyright IBM Corp 2019 #include <linux/bitops.h> #include <linux/device.h> #include <linux/export.h> #include <linux/hwmon-sysfs.h> #include <linux/kernel.h> #include <linux/kstrtox.h> #include <linux/sysfs.h> #include "common.h" /* OCC status register */ #define OCC_STAT_MASTER BIT(7) /* OCC extended status register */ #define OCC_EXT_STAT_DVFS_OT BIT(7) #define OCC_EXT_STAT_DVFS_POWER BIT(6) #define OCC_EXT_STAT_MEM_THROTTLE BIT(5) #define OCC_EXT_STAT_QUICK_DROP BIT(4) #define OCC_EXT_STAT_DVFS_VDD BIT(3) #define OCC_EXT_STAT_GPU_THROTTLE GENMASK(2, 0) static ssize_t occ_active_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int rc; bool active; struct occ *occ = dev_get_drvdata(dev); rc = kstrtobool(buf, &active); if (rc) return rc; rc = occ_active(occ, active); if (rc) return rc; return count; } static ssize_t occ_sysfs_show(struct device *dev, struct device_attribute *attr, char *buf) { int rc; int val = 0; struct occ *occ = dev_get_drvdata(dev); struct occ_poll_response_header *header; struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); if (occ->active) { rc = occ_update_response(occ); if (rc) return rc; header = (struct occ_poll_response_header *)occ->resp.data; switch (sattr->index) { case 0: val = !!(header->status & OCC_STAT_MASTER); break; case 1: val = 1; break; case 2: val = !!(header->ext_status & OCC_EXT_STAT_DVFS_OT); break; case 3: val = !!(header->ext_status & OCC_EXT_STAT_DVFS_POWER); break; case 4: val = !!(header->ext_status & OCC_EXT_STAT_MEM_THROTTLE); break; case 5: val = !!(header->ext_status & OCC_EXT_STAT_QUICK_DROP); break; case 6: val = header->occ_state; break; case 7: if (header->status & OCC_STAT_MASTER) val = hweight8(header->occs_present); else val = 1; break; case 8: val = header->ips_status; break; case 9: val = header->mode; break; case 10: val = !!(header->ext_status & OCC_EXT_STAT_DVFS_VDD); break; case 11: val = header->ext_status & OCC_EXT_STAT_GPU_THROTTLE; break; default: return -EINVAL; } } else { if (sattr->index == 1) val = 0; else if (sattr->index <= 11) val = -ENODATA; else return -EINVAL; } return sysfs_emit(buf, "%d\n", val); } static ssize_t occ_error_show(struct device *dev, struct device_attribute *attr, char *buf) { struct occ *occ = dev_get_drvdata(dev); occ_update_response(occ); return sysfs_emit(buf, "%d\n", occ->error); } static SENSOR_DEVICE_ATTR(occ_master, 0444, occ_sysfs_show, NULL, 0); static SENSOR_DEVICE_ATTR(occ_active, 0644, occ_sysfs_show, occ_active_store, 1); static SENSOR_DEVICE_ATTR(occ_dvfs_overtemp, 0444, occ_sysfs_show, NULL, 2); static SENSOR_DEVICE_ATTR(occ_dvfs_power, 0444, occ_sysfs_show, NULL, 3); static SENSOR_DEVICE_ATTR(occ_mem_throttle, 0444, occ_sysfs_show, NULL, 4); static SENSOR_DEVICE_ATTR(occ_quick_pwr_drop, 0444, occ_sysfs_show, NULL, 5); static SENSOR_DEVICE_ATTR(occ_state, 0444, occ_sysfs_show, NULL, 6); static SENSOR_DEVICE_ATTR(occs_present, 0444, occ_sysfs_show, NULL, 7); static SENSOR_DEVICE_ATTR(occ_ips_status, 0444, occ_sysfs_show, NULL, 8); static SENSOR_DEVICE_ATTR(occ_mode, 0444, occ_sysfs_show, NULL, 9); static SENSOR_DEVICE_ATTR(occ_dvfs_vdd, 0444, occ_sysfs_show, NULL, 10); static SENSOR_DEVICE_ATTR(occ_gpu_throttle, 0444, occ_sysfs_show, NULL, 11); static DEVICE_ATTR_RO(occ_error); static struct attribute *occ_attributes[] = { &sensor_dev_attr_occ_master.dev_attr.attr, &sensor_dev_attr_occ_active.dev_attr.attr, &sensor_dev_attr_occ_dvfs_overtemp.dev_attr.attr, &sensor_dev_attr_occ_dvfs_power.dev_attr.attr, &sensor_dev_attr_occ_mem_throttle.dev_attr.attr, &sensor_dev_attr_occ_quick_pwr_drop.dev_attr.attr, &sensor_dev_attr_occ_state.dev_attr.attr, &sensor_dev_attr_occs_present.dev_attr.attr, &sensor_dev_attr_occ_ips_status.dev_attr.attr, &sensor_dev_attr_occ_mode.dev_attr.attr, &sensor_dev_attr_occ_dvfs_vdd.dev_attr.attr, &sensor_dev_attr_occ_gpu_throttle.dev_attr.attr, &dev_attr_occ_error.attr, NULL }; static const struct attribute_group occ_sysfs = { .attrs = occ_attributes, }; void occ_sysfs_poll_done(struct occ *occ) { const char *name; struct occ_poll_response_header *header = (struct occ_poll_response_header *)occ->resp.data; /* * On the first poll response, we haven't yet created the sysfs * attributes, so don't make any notify calls. */ if (!occ->active) goto done; if ((header->status & OCC_STAT_MASTER) != (occ->prev_stat & OCC_STAT_MASTER)) { name = sensor_dev_attr_occ_master.dev_attr.attr.name; sysfs_notify(&occ->bus_dev->kobj, NULL, name); } if ((header->ext_status & OCC_EXT_STAT_DVFS_OT) != (occ->prev_ext_stat & OCC_EXT_STAT_DVFS_OT)) { name = sensor_dev_attr_occ_dvfs_overtemp.dev_attr.attr.name; sysfs_notify(&occ->bus_dev->kobj, NULL, name); } if ((header->ext_status & OCC_EXT_STAT_DVFS_POWER) != (occ->prev_ext_stat & OCC_EXT_STAT_DVFS_POWER)) { name = sensor_dev_attr_occ_dvfs_power.dev_attr.attr.name; sysfs_notify(&occ->bus_dev->kobj, NULL, name); } if ((header->ext_status & OCC_EXT_STAT_MEM_THROTTLE) != (occ->prev_ext_stat & OCC_EXT_STAT_MEM_THROTTLE)) { name = sensor_dev_attr_occ_mem_throttle.dev_attr.attr.name; sysfs_notify(&occ->bus_dev->kobj, NULL, name); } if ((header->ext_status & OCC_EXT_STAT_QUICK_DROP) != (occ->prev_ext_stat & OCC_EXT_STAT_QUICK_DROP)) { name = sensor_dev_attr_occ_quick_pwr_drop.dev_attr.attr.name; sysfs_notify(&occ->bus_dev->kobj, NULL, name); } if ((header->ext_status & OCC_EXT_STAT_DVFS_VDD) != (occ->prev_ext_stat & OCC_EXT_STAT_DVFS_VDD)) { name = sensor_dev_attr_occ_dvfs_vdd.dev_attr.attr.name; sysfs_notify(&occ->bus_dev->kobj, NULL, name); } if ((header->ext_status & OCC_EXT_STAT_GPU_THROTTLE) != (occ->prev_ext_stat & OCC_EXT_STAT_GPU_THROTTLE)) { name = sensor_dev_attr_occ_gpu_throttle.dev_attr.attr.name; sysfs_notify(&occ->bus_dev->kobj, NULL, name); } if ((header->status & OCC_STAT_MASTER) && header->occs_present != occ->prev_occs_present) { name = sensor_dev_attr_occs_present.dev_attr.attr.name; sysfs_notify(&occ->bus_dev->kobj, NULL, name); } if (header->ips_status != occ->prev_ips_status) { name = sensor_dev_attr_occ_ips_status.dev_attr.attr.name; sysfs_notify(&occ->bus_dev->kobj, NULL, name); } if (header->mode != occ->prev_mode) { name = sensor_dev_attr_occ_mode.dev_attr.attr.name; sysfs_notify(&occ->bus_dev->kobj, NULL, name); } if (occ->error && occ->error != occ->prev_error) { name = dev_attr_occ_error.attr.name; sysfs_notify(&occ->bus_dev->kobj, NULL, name); } /* no notifications for OCC state; doesn't indicate error condition */ done: occ->prev_error = occ->error; occ->prev_stat = header->status; occ->prev_ext_stat = header->ext_status; occ->prev_occs_present = header->occs_present; occ->prev_ips_status = header->ips_status; occ->prev_mode = header->mode; } int occ_setup_sysfs(struct occ *occ) { return sysfs_create_group(&occ->bus_dev->kobj, &occ_sysfs); } void occ_shutdown_sysfs(struct occ *occ) { sysfs_remove_group(&occ->bus_dev->kobj, &occ_sysfs); } |