hw/ppc/pnv_occ.c

   1 /*
   2  * QEMU PowerPC PowerNV Emulation of a few OCC related registers
   3  *
   4  * Copyright (c) 2015-2017, IBM Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License, version 2, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "qemu/osdep.h"
  20 #include "target/ppc/cpu.h"
  21 #include "qapi/error.h"
  22 #include "qemu/log.h"
  23 #include "qemu/module.h"
  24 #include "hw/qdev-properties.h"
  25 #include "hw/ppc/pnv.h"
  26 #include "hw/ppc/pnv_xscom.h"
  27 #include "hw/ppc/pnv_occ.h"
  28
  29 #define OCB_OCI_OCCMISC         0x4020
  30 #define OCB_OCI_OCCMISC_AND     0x4021
  31 #define OCB_OCI_OCCMISC_OR      0x4022
  32
  33 /* OCC sensors */
  34 #define OCC_SENSOR_DATA_BLOCK_OFFSET          0x580000
  35 #define OCC_SENSOR_DATA_VALID                 0x580001
  36 #define OCC_SENSOR_DATA_VERSION               0x580002
  37 #define OCC_SENSOR_DATA_READING_VERSION       0x580004
  38 #define OCC_SENSOR_DATA_NR_SENSORS            0x580008
  39 #define OCC_SENSOR_DATA_NAMES_OFFSET          0x580010
  40 #define OCC_SENSOR_DATA_READING_PING_OFFSET   0x580014
  41 #define OCC_SENSOR_DATA_READING_PONG_OFFSET   0x58000c
  42 #define OCC_SENSOR_DATA_NAME_LENGTH           0x58000d
  43 #define OCC_SENSOR_NAME_STRUCTURE_TYPE        0x580023
  44 #define OCC_SENSOR_LOC_CORE                   0x580022
  45 #define OCC_SENSOR_LOC_GPU                    0x580020
  46 #define OCC_SENSOR_TYPE_POWER                 0x580003
  47 #define OCC_SENSOR_NAME                       0x580005
  48 #define HWMON_SENSORS_MASK                    0x58001e
  49 #define SLW_IMAGE_BASE                        0x0
  50
  51 static void pnv_occ_set_misc(PnvOCC *occ, uint64_t val)
  52 {
  53     bool irq_state;
  54     PnvOCCClass *poc = PNV_OCC_GET_CLASS(occ);
  55
  56     val &= 0xffff000000000000ull;
  57
  58     occ->occmisc = val;
  59     irq_state = !!(val >> 63);
  60     pnv_psi_irq_set(occ->psi, poc->psi_irq, irq_state);
  61 }
  62
  63 static uint64_t pnv_occ_power8_xscom_read(void *opaque, hwaddr addr,
  64                                           unsigned size)
  65 {
  66     PnvOCC *occ = PNV_OCC(opaque);
  67     uint32_t offset = addr >> 3;
  68     uint64_t val = 0;
  69
  70     switch (offset) {
  71     case OCB_OCI_OCCMISC:
  72         val = occ->occmisc;
  73         break;
  74     default:
  75         qemu_log_mask(LOG_UNIMP, "OCC Unimplemented register: Ox%"
  76                       HWADDR_PRIx "\n", addr >> 3);
  77     }
  78     return val;
  79 }
  80
  81 static void pnv_occ_power8_xscom_write(void *opaque, hwaddr addr,
  82                                        uint64_t val, unsigned size)
  83 {
  84     PnvOCC *occ = PNV_OCC(opaque);
  85     uint32_t offset = addr >> 3;
  86
  87     switch (offset) {
  88     case OCB_OCI_OCCMISC_AND:
  89         pnv_occ_set_misc(occ, occ->occmisc & val);
  90         break;
  91     case OCB_OCI_OCCMISC_OR:
  92         pnv_occ_set_misc(occ, occ->occmisc | val);
  93         break;
  94     case OCB_OCI_OCCMISC:
  95         pnv_occ_set_misc(occ, val);
  96         break;
  97     default:
  98         qemu_log_mask(LOG_UNIMP, "OCC Unimplemented register: Ox%"
  99                       HWADDR_PRIx "\n", addr >> 3);
 100     }
 101 }
 102
 103 static uint64_t pnv_occ_common_area_read(void *opaque, hwaddr addr,
 104                                          unsigned width)
 105 {
 106     switch (addr) {
 107     /*
 108      * occ-sensor sanity check that asserts the sensor
 109      * header block
 110      */
 111     case OCC_SENSOR_DATA_BLOCK_OFFSET:
 112     case OCC_SENSOR_DATA_VALID:
 113     case OCC_SENSOR_DATA_VERSION:
 114     case OCC_SENSOR_DATA_READING_VERSION:
 115     case OCC_SENSOR_DATA_NR_SENSORS:
 116     case OCC_SENSOR_DATA_NAMES_OFFSET:
 117     case OCC_SENSOR_DATA_READING_PING_OFFSET:
 118     case OCC_SENSOR_DATA_READING_PONG_OFFSET:
 119     case OCC_SENSOR_NAME_STRUCTURE_TYPE:
 120         return 1;
 121     case OCC_SENSOR_DATA_NAME_LENGTH:
 122         return 0x30;
 123     case OCC_SENSOR_LOC_CORE:
 124         return 0x0040;
 125     case OCC_SENSOR_TYPE_POWER:
 126         return 0x0080;
 127     case OCC_SENSOR_NAME:
 128         return 0x1000;
 129     case HWMON_SENSORS_MASK:
 130     case OCC_SENSOR_LOC_GPU:
 131         return 0x8e00;
 132     case SLW_IMAGE_BASE:
 133         return 0x1000000000000000;
 134     }
 135     return 0;
 136 }
 137
 138 static void pnv_occ_common_area_write(void *opaque, hwaddr addr,
 139                                              uint64_t val, unsigned width)
 140 {
 141     /* callback function defined to occ common area write */
 142     return;
 143 }
 144
 145 static const MemoryRegionOps pnv_occ_power8_xscom_ops = {
 146     .read = pnv_occ_power8_xscom_read,
 147     .write = pnv_occ_power8_xscom_write,
 148     .valid.min_access_size = 8,
 149     .valid.max_access_size = 8,
 150     .impl.min_access_size = 8,
 151     .impl.max_access_size = 8,
 152     .endianness = DEVICE_BIG_ENDIAN,
 153 };
 154
 155 const MemoryRegionOps pnv_occ_sram_ops = {
 156     .read = pnv_occ_common_area_read,
 157     .write = pnv_occ_common_area_write,
 158     .valid.min_access_size = 1,
 159     .valid.max_access_size = 8,
 160     .impl.min_access_size = 1,
 161     .impl.max_access_size = 8,
 162     .endianness = DEVICE_BIG_ENDIAN,
 163 };
 164
 165 static void pnv_occ_power8_class_init(ObjectClass *klass, void *data)
 166 {
 167     PnvOCCClass *poc = PNV_OCC_CLASS(klass);
 168
 169     poc->xscom_size = PNV_XSCOM_OCC_SIZE;
 170     poc->xscom_ops = &pnv_occ_power8_xscom_ops;
 171     poc->psi_irq = PSIHB_IRQ_OCC;
 172 }
 173
 174 static const TypeInfo pnv_occ_power8_type_info = {
 175     .name          = TYPE_PNV8_OCC,
 176     .parent        = TYPE_PNV_OCC,
 177     .instance_size = sizeof(PnvOCC),
 178     .class_init    = pnv_occ_power8_class_init,
 179 };
 180
 181 #define P9_OCB_OCI_OCCMISC              0x6080
 182 #define P9_OCB_OCI_OCCMISC_CLEAR        0x6081
 183 #define P9_OCB_OCI_OCCMISC_OR           0x6082
 184
 185
 186 static uint64_t pnv_occ_power9_xscom_read(void *opaque, hwaddr addr,
 187                                           unsigned size)
 188 {
 189     PnvOCC *occ = PNV_OCC(opaque);
 190     uint32_t offset = addr >> 3;
 191     uint64_t val = 0;
 192
 193     switch (offset) {
 194     case P9_OCB_OCI_OCCMISC:
 195         val = occ->occmisc;
 196         break;
 197     default:
 198         qemu_log_mask(LOG_UNIMP, "OCC Unimplemented register: Ox%"
 199                       HWADDR_PRIx "\n", addr >> 3);
 200     }
 201     return val;
 202 }
 203
 204 static void pnv_occ_power9_xscom_write(void *opaque, hwaddr addr,
 205                                        uint64_t val, unsigned size)
 206 {
 207     PnvOCC *occ = PNV_OCC(opaque);
 208     uint32_t offset = addr >> 3;
 209
 210     switch (offset) {
 211     case P9_OCB_OCI_OCCMISC_CLEAR:
 212         pnv_occ_set_misc(occ, 0);
 213         break;
 214     case P9_OCB_OCI_OCCMISC_OR:
 215         pnv_occ_set_misc(occ, occ->occmisc | val);
 216         break;
 217     case P9_OCB_OCI_OCCMISC:
 218         pnv_occ_set_misc(occ, val);
 219        break;
 220     default:
 221         qemu_log_mask(LOG_UNIMP, "OCC Unimplemented register: Ox%"
 222                       HWADDR_PRIx "\n", addr >> 3);
 223     }
 224 }
 225
 226 static const MemoryRegionOps pnv_occ_power9_xscom_ops = {
 227     .read = pnv_occ_power9_xscom_read,
 228     .write = pnv_occ_power9_xscom_write,
 229     .valid.min_access_size = 8,
 230     .valid.max_access_size = 8,
 231     .impl.min_access_size = 8,
 232     .impl.max_access_size = 8,
 233     .endianness = DEVICE_BIG_ENDIAN,
 234 };
 235
 236 static void pnv_occ_power9_class_init(ObjectClass *klass, void *data)
 237 {
 238     PnvOCCClass *poc = PNV_OCC_CLASS(klass);
 239
 240     poc->xscom_size = PNV9_XSCOM_OCC_SIZE;
 241     poc->xscom_ops = &pnv_occ_power9_xscom_ops;
 242     poc->psi_irq = PSIHB9_IRQ_OCC;
 243 }
 244
 245 static const TypeInfo pnv_occ_power9_type_info = {
 246     .name          = TYPE_PNV9_OCC,
 247     .parent        = TYPE_PNV_OCC,
 248     .instance_size = sizeof(PnvOCC),
 249     .class_init    = pnv_occ_power9_class_init,
 250 };
 251
 252 static void pnv_occ_realize(DeviceState *dev, Error **errp)
 253 {
 254     PnvOCC *occ = PNV_OCC(dev);
 255     PnvOCCClass *poc = PNV_OCC_GET_CLASS(occ);
 256
 257     assert(occ->psi);
 258
 259     occ->occmisc = 0;
 260
 261     /* XScom region for OCC registers */
 262     pnv_xscom_region_init(&occ->xscom_regs, OBJECT(dev), poc->xscom_ops,
 263                           occ, "xscom-occ", poc->xscom_size);
 264
 265     /* OCC common area mmio region for OCC SRAM registers */
 266     memory_region_init_io(&occ->sram_regs, OBJECT(dev), &pnv_occ_sram_ops,
 267                           occ, "occ-common-area",
 268                           PNV_OCC_SENSOR_DATA_BLOCK_SIZE);
 269 }
 270
 271 static Property pnv_occ_properties[] = {
 272     DEFINE_PROP_LINK("psi", PnvOCC, psi, TYPE_PNV_PSI, PnvPsi *),
 273     DEFINE_PROP_END_OF_LIST(),
 274 };
 275
 276 static void pnv_occ_class_init(ObjectClass *klass, void *data)
 277 {
 278     DeviceClass *dc = DEVICE_CLASS(klass);
 279
 280     dc->realize = pnv_occ_realize;
 281     dc->desc = "PowerNV OCC Controller";
 282     dc->props = pnv_occ_properties;
 283 }
 284
 285 static const TypeInfo pnv_occ_type_info = {
 286     .name          = TYPE_PNV_OCC,
 287     .parent        = TYPE_DEVICE,
 288     .instance_size = sizeof(PnvOCC),
 289     .class_init    = pnv_occ_class_init,
 290     .class_size    = sizeof(PnvOCCClass),
 291     .abstract      = true,
 292 };
 293
 294 static void pnv_occ_register_types(void)
 295 {
 296     type_register_static(&pnv_occ_type_info);
 297     type_register_static(&pnv_occ_power8_type_info);
 298     type_register_static(&pnv_occ_power9_type_info);
 299 }
 300
 301 type_init(pnv_occ_register_types);