1 /* 2 * QEMU PowerNV, BMC related functions 3 * 4 * Copyright (c) 2016-2017, 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 "qemu-common.h" 21 #include "qapi/error.h" 22 #include "target/ppc/cpu.h" 23 #include "qemu/log.h" 24 #include "hw/ipmi/ipmi.h" 25 #include "hw/ppc/fdt.h" 26 27 #include "hw/ppc/pnv.h" 28 29 #include <libfdt.h> 30 31 /* TODO: include definition in ipmi.h */ 32 #define IPMI_SDR_FULL_TYPE 1 33 34 /* 35 * OEM SEL Event data packet sent by BMC in response of a Read Event 36 * Message Buffer command 37 */ 38 typedef struct OemSel { 39 /* SEL header */ 40 uint8_t id[2]; 41 uint8_t type; 42 uint8_t timestamp[4]; 43 uint8_t manuf_id[3]; 44 45 /* OEM SEL data (6 bytes) follows */ 46 uint8_t netfun; 47 uint8_t cmd; 48 uint8_t data[4]; 49 } OemSel; 50 51 #define SOFT_OFF 0x00 52 #define SOFT_REBOOT 0x01 53 54 static bool pnv_bmc_is_simulator(IPMIBmc *bmc) 55 { 56 return object_dynamic_cast(OBJECT(bmc), TYPE_IPMI_BMC_SIMULATOR); 57 } 58 59 static void pnv_gen_oem_sel(IPMIBmc *bmc, uint8_t reboot) 60 { 61 /* IPMI SEL Event are 16 bytes long */ 62 OemSel sel = { 63 .id = { 0x55 , 0x55 }, 64 .type = 0xC0, /* OEM */ 65 .manuf_id = { 0x0, 0x0, 0x0 }, 66 .timestamp = { 0x0, 0x0, 0x0, 0x0 }, 67 .netfun = 0x3A, /* IBM */ 68 .cmd = 0x04, /* AMI OEM SEL Power Notification */ 69 .data = { reboot, 0xFF, 0xFF, 0xFF }, 70 }; 71 72 ipmi_bmc_gen_event(bmc, (uint8_t *) &sel, 0 /* do not log the event */); 73 } 74 75 void pnv_bmc_powerdown(IPMIBmc *bmc) 76 { 77 pnv_gen_oem_sel(bmc, SOFT_OFF); 78 } 79 80 void pnv_dt_bmc_sensors(IPMIBmc *bmc, void *fdt) 81 { 82 int offset; 83 int i; 84 const struct ipmi_sdr_compact *sdr; 85 uint16_t nextrec; 86 87 if (!pnv_bmc_is_simulator(bmc)) { 88 return; 89 } 90 91 offset = fdt_add_subnode(fdt, 0, "bmc"); 92 _FDT(offset); 93 94 _FDT((fdt_setprop_string(fdt, offset, "name", "bmc"))); 95 offset = fdt_add_subnode(fdt, offset, "sensors"); 96 _FDT(offset); 97 98 _FDT((fdt_setprop_cell(fdt, offset, "#address-cells", 0x1))); 99 _FDT((fdt_setprop_cell(fdt, offset, "#size-cells", 0x0))); 100 101 for (i = 0; !ipmi_bmc_sdr_find(bmc, i, &sdr, &nextrec); i++) { 102 int off; 103 char *name; 104 105 if (sdr->header.rec_type != IPMI_SDR_COMPACT_TYPE && 106 sdr->header.rec_type != IPMI_SDR_FULL_TYPE) { 107 continue; 108 } 109 110 name = g_strdup_printf("sensor@%x", sdr->sensor_owner_number); 111 off = fdt_add_subnode(fdt, offset, name); 112 _FDT(off); 113 g_free(name); 114 115 _FDT((fdt_setprop_cell(fdt, off, "reg", sdr->sensor_owner_number))); 116 _FDT((fdt_setprop_string(fdt, off, "name", "sensor"))); 117 _FDT((fdt_setprop_string(fdt, off, "compatible", "ibm,ipmi-sensor"))); 118 _FDT((fdt_setprop_cell(fdt, off, "ipmi-sensor-reading-type", 119 sdr->reading_type))); 120 _FDT((fdt_setprop_cell(fdt, off, "ipmi-entity-id", 121 sdr->entity_id))); 122 _FDT((fdt_setprop_cell(fdt, off, "ipmi-entity-instance", 123 sdr->entity_instance))); 124 _FDT((fdt_setprop_cell(fdt, off, "ipmi-sensor-type", 125 sdr->sensor_type))); 126 } 127 } 128 129 /* 130 * HIOMAP protocol handler 131 */ 132 #define HIOMAP_C_RESET 1 133 #define HIOMAP_C_GET_INFO 2 134 #define HIOMAP_C_GET_FLASH_INFO 3 135 #define HIOMAP_C_CREATE_READ_WINDOW 4 136 #define HIOMAP_C_CLOSE_WINDOW 5 137 #define HIOMAP_C_CREATE_WRITE_WINDOW 6 138 #define HIOMAP_C_MARK_DIRTY 7 139 #define HIOMAP_C_FLUSH 8 140 #define HIOMAP_C_ACK 9 141 #define HIOMAP_C_ERASE 10 142 #define HIOMAP_C_DEVICE_NAME 11 143 #define HIOMAP_C_LOCK 12 144 145 #define BLOCK_SHIFT 12 /* 4K */ 146 147 static uint16_t bytes_to_blocks(uint32_t bytes) 148 { 149 return bytes >> BLOCK_SHIFT; 150 } 151 152 static uint32_t blocks_to_bytes(uint16_t blocks) 153 { 154 return blocks << BLOCK_SHIFT; 155 } 156 157 static int hiomap_erase(PnvPnor *pnor, uint32_t offset, uint32_t size) 158 { 159 MemTxResult result; 160 int i; 161 162 for (i = 0; i < size / 4; i++) { 163 result = memory_region_dispatch_write(&pnor->mmio, offset + i * 4, 164 0xFFFFFFFF, MO_32, 165 MEMTXATTRS_UNSPECIFIED); 166 if (result != MEMTX_OK) { 167 return -1; 168 } 169 } 170 return 0; 171 } 172 173 static void hiomap_cmd(IPMIBmcSim *ibs, uint8_t *cmd, unsigned int cmd_len, 174 RspBuffer *rsp) 175 { 176 PnvPnor *pnor = PNV_PNOR(object_property_get_link(OBJECT(ibs), "pnor", 177 &error_abort)); 178 uint32_t pnor_size = pnor->size; 179 uint32_t pnor_addr = PNOR_SPI_OFFSET; 180 bool readonly = false; 181 182 rsp_buffer_push(rsp, cmd[2]); 183 rsp_buffer_push(rsp, cmd[3]); 184 185 switch (cmd[2]) { 186 case HIOMAP_C_MARK_DIRTY: 187 case HIOMAP_C_FLUSH: 188 case HIOMAP_C_ACK: 189 break; 190 191 case HIOMAP_C_ERASE: 192 if (hiomap_erase(pnor, blocks_to_bytes(cmd[5] << 8 | cmd[4]), 193 blocks_to_bytes(cmd[7] << 8 | cmd[6]))) { 194 rsp_buffer_set_error(rsp, IPMI_CC_UNSPECIFIED); 195 } 196 break; 197 198 case HIOMAP_C_GET_INFO: 199 rsp_buffer_push(rsp, 2); /* Version 2 */ 200 rsp_buffer_push(rsp, BLOCK_SHIFT); /* block size */ 201 rsp_buffer_push(rsp, 0); /* Timeout */ 202 rsp_buffer_push(rsp, 0); /* Timeout */ 203 break; 204 205 case HIOMAP_C_GET_FLASH_INFO: 206 rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) & 0xFF); 207 rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) >> 8); 208 rsp_buffer_push(rsp, 0x01); /* erase size */ 209 rsp_buffer_push(rsp, 0x00); /* erase size */ 210 break; 211 212 case HIOMAP_C_CREATE_READ_WINDOW: 213 readonly = true; 214 /* Fall through */ 215 216 case HIOMAP_C_CREATE_WRITE_WINDOW: 217 memory_region_set_readonly(&pnor->mmio, readonly); 218 memory_region_set_enabled(&pnor->mmio, true); 219 220 rsp_buffer_push(rsp, bytes_to_blocks(pnor_addr) & 0xFF); 221 rsp_buffer_push(rsp, bytes_to_blocks(pnor_addr) >> 8); 222 rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) & 0xFF); 223 rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) >> 8); 224 rsp_buffer_push(rsp, 0x00); /* offset */ 225 rsp_buffer_push(rsp, 0x00); /* offset */ 226 break; 227 228 case HIOMAP_C_CLOSE_WINDOW: 229 memory_region_set_enabled(&pnor->mmio, false); 230 break; 231 232 case HIOMAP_C_DEVICE_NAME: 233 case HIOMAP_C_RESET: 234 case HIOMAP_C_LOCK: 235 default: 236 qemu_log_mask(LOG_GUEST_ERROR, "HIOMAP: unknown command %02X\n", cmd[2]); 237 break; 238 } 239 } 240 241 #define HIOMAP 0x5a 242 243 static const IPMICmdHandler hiomap_cmds[] = { 244 [HIOMAP] = { hiomap_cmd, 3 }, 245 }; 246 247 static const IPMINetfn hiomap_netfn = { 248 .cmd_nums = ARRAY_SIZE(hiomap_cmds), 249 .cmd_handlers = hiomap_cmds 250 }; 251 252 253 void pnv_bmc_set_pnor(IPMIBmc *bmc, PnvPnor *pnor) 254 { 255 if (!pnv_bmc_is_simulator(bmc)) { 256 return; 257 } 258 259 object_ref(OBJECT(pnor)); 260 object_property_add_const_link(OBJECT(bmc), "pnor", OBJECT(pnor)); 261 262 /* Install the HIOMAP protocol handlers to access the PNOR */ 263 ipmi_sim_register_netfn(IPMI_BMC_SIMULATOR(bmc), IPMI_NETFN_OEM, 264 &hiomap_netfn); 265 } 266 267 /* 268 * Instantiate the machine BMC. PowerNV uses the QEMU internal 269 * simulator but it could also be external. 270 */ 271 IPMIBmc *pnv_bmc_create(PnvPnor *pnor) 272 { 273 Object *obj; 274 275 obj = object_new(TYPE_IPMI_BMC_SIMULATOR); 276 qdev_realize(DEVICE(obj), NULL, &error_fatal); 277 pnv_bmc_set_pnor(IPMI_BMC(obj), pnor); 278 279 return IPMI_BMC(obj); 280 } 281 282 typedef struct ForeachArgs { 283 const char *name; 284 Object *obj; 285 } ForeachArgs; 286 287 static int bmc_find(Object *child, void *opaque) 288 { 289 ForeachArgs *args = opaque; 290 291 if (object_dynamic_cast(child, args->name)) { 292 if (args->obj) { 293 return 1; 294 } 295 args->obj = child; 296 } 297 return 0; 298 } 299 300 IPMIBmc *pnv_bmc_find(Error **errp) 301 { 302 ForeachArgs args = { TYPE_IPMI_BMC, NULL }; 303 int ret; 304 305 ret = object_child_foreach_recursive(object_get_root(), bmc_find, &args); 306 if (ret) { 307 error_setg(errp, "machine should have only one BMC device. " 308 "Use '-nodefaults'"); 309 return NULL; 310 } 311 312 return args.obj ? IPMI_BMC(args.obj) : NULL; 313 } 314