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 void pnv_gen_oem_sel(IPMIBmc *bmc, uint8_t reboot) 55 { 56 /* IPMI SEL Event are 16 bytes long */ 57 OemSel sel = { 58 .id = { 0x55 , 0x55 }, 59 .type = 0xC0, /* OEM */ 60 .manuf_id = { 0x0, 0x0, 0x0 }, 61 .timestamp = { 0x0, 0x0, 0x0, 0x0 }, 62 .netfun = 0x3A, /* IBM */ 63 .cmd = 0x04, /* AMI OEM SEL Power Notification */ 64 .data = { reboot, 0xFF, 0xFF, 0xFF }, 65 }; 66 67 ipmi_bmc_gen_event(bmc, (uint8_t *) &sel, 0 /* do not log the event */); 68 } 69 70 void pnv_bmc_powerdown(IPMIBmc *bmc) 71 { 72 pnv_gen_oem_sel(bmc, SOFT_OFF); 73 } 74 75 void pnv_dt_bmc_sensors(IPMIBmc *bmc, void *fdt) 76 { 77 int offset; 78 int i; 79 const struct ipmi_sdr_compact *sdr; 80 uint16_t nextrec; 81 82 offset = fdt_add_subnode(fdt, 0, "bmc"); 83 _FDT(offset); 84 85 _FDT((fdt_setprop_string(fdt, offset, "name", "bmc"))); 86 offset = fdt_add_subnode(fdt, offset, "sensors"); 87 _FDT(offset); 88 89 _FDT((fdt_setprop_cell(fdt, offset, "#address-cells", 0x1))); 90 _FDT((fdt_setprop_cell(fdt, offset, "#size-cells", 0x0))); 91 92 for (i = 0; !ipmi_bmc_sdr_find(bmc, i, &sdr, &nextrec); i++) { 93 int off; 94 char *name; 95 96 if (sdr->header.rec_type != IPMI_SDR_COMPACT_TYPE && 97 sdr->header.rec_type != IPMI_SDR_FULL_TYPE) { 98 continue; 99 } 100 101 name = g_strdup_printf("sensor@%x", sdr->sensor_owner_number); 102 off = fdt_add_subnode(fdt, offset, name); 103 _FDT(off); 104 g_free(name); 105 106 _FDT((fdt_setprop_cell(fdt, off, "reg", sdr->sensor_owner_number))); 107 _FDT((fdt_setprop_string(fdt, off, "name", "sensor"))); 108 _FDT((fdt_setprop_string(fdt, off, "compatible", "ibm,ipmi-sensor"))); 109 _FDT((fdt_setprop_cell(fdt, off, "ipmi-sensor-reading-type", 110 sdr->reading_type))); 111 _FDT((fdt_setprop_cell(fdt, off, "ipmi-entity-id", 112 sdr->entity_id))); 113 _FDT((fdt_setprop_cell(fdt, off, "ipmi-entity-instance", 114 sdr->entity_instance))); 115 _FDT((fdt_setprop_cell(fdt, off, "ipmi-sensor-type", 116 sdr->sensor_type))); 117 } 118 } 119 120 /* 121 * HIOMAP protocol handler 122 */ 123 #define HIOMAP_C_RESET 1 124 #define HIOMAP_C_GET_INFO 2 125 #define HIOMAP_C_GET_FLASH_INFO 3 126 #define HIOMAP_C_CREATE_READ_WINDOW 4 127 #define HIOMAP_C_CLOSE_WINDOW 5 128 #define HIOMAP_C_CREATE_WRITE_WINDOW 6 129 #define HIOMAP_C_MARK_DIRTY 7 130 #define HIOMAP_C_FLUSH 8 131 #define HIOMAP_C_ACK 9 132 #define HIOMAP_C_ERASE 10 133 #define HIOMAP_C_DEVICE_NAME 11 134 #define HIOMAP_C_LOCK 12 135 136 #define BLOCK_SHIFT 12 /* 4K */ 137 138 static uint16_t bytes_to_blocks(uint32_t bytes) 139 { 140 return bytes >> BLOCK_SHIFT; 141 } 142 143 static void hiomap_cmd(IPMIBmcSim *ibs, uint8_t *cmd, unsigned int cmd_len, 144 RspBuffer *rsp) 145 { 146 PnvPnor *pnor = PNV_PNOR(object_property_get_link(OBJECT(ibs), "pnor", 147 &error_abort)); 148 uint32_t pnor_size = pnor->size; 149 uint32_t pnor_addr = PNOR_SPI_OFFSET; 150 bool readonly = false; 151 152 rsp_buffer_push(rsp, cmd[2]); 153 rsp_buffer_push(rsp, cmd[3]); 154 155 switch (cmd[2]) { 156 case HIOMAP_C_MARK_DIRTY: 157 case HIOMAP_C_FLUSH: 158 case HIOMAP_C_ERASE: 159 case HIOMAP_C_ACK: 160 break; 161 162 case HIOMAP_C_GET_INFO: 163 rsp_buffer_push(rsp, 2); /* Version 2 */ 164 rsp_buffer_push(rsp, BLOCK_SHIFT); /* block size */ 165 rsp_buffer_push(rsp, 0); /* Timeout */ 166 rsp_buffer_push(rsp, 0); /* Timeout */ 167 break; 168 169 case HIOMAP_C_GET_FLASH_INFO: 170 rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) & 0xFF); 171 rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) >> 8); 172 rsp_buffer_push(rsp, 0x01); /* erase size */ 173 rsp_buffer_push(rsp, 0x00); /* erase size */ 174 break; 175 176 case HIOMAP_C_CREATE_READ_WINDOW: 177 readonly = true; 178 /* Fall through */ 179 180 case HIOMAP_C_CREATE_WRITE_WINDOW: 181 memory_region_set_readonly(&pnor->mmio, readonly); 182 memory_region_set_enabled(&pnor->mmio, true); 183 184 rsp_buffer_push(rsp, bytes_to_blocks(pnor_addr) & 0xFF); 185 rsp_buffer_push(rsp, bytes_to_blocks(pnor_addr) >> 8); 186 rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) & 0xFF); 187 rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) >> 8); 188 rsp_buffer_push(rsp, 0x00); /* offset */ 189 rsp_buffer_push(rsp, 0x00); /* offset */ 190 break; 191 192 case HIOMAP_C_CLOSE_WINDOW: 193 memory_region_set_enabled(&pnor->mmio, false); 194 break; 195 196 case HIOMAP_C_DEVICE_NAME: 197 case HIOMAP_C_RESET: 198 case HIOMAP_C_LOCK: 199 default: 200 qemu_log_mask(LOG_GUEST_ERROR, "HIOMAP: unknow command %02X\n", cmd[2]); 201 break; 202 } 203 } 204 205 #define HIOMAP 0x5a 206 207 static const IPMICmdHandler hiomap_cmds[] = { 208 [HIOMAP] = { hiomap_cmd, 3 }, 209 }; 210 211 static const IPMINetfn hiomap_netfn = { 212 .cmd_nums = ARRAY_SIZE(hiomap_cmds), 213 .cmd_handlers = hiomap_cmds 214 }; 215 216 217 void pnv_bmc_set_pnor(IPMIBmc *bmc, PnvPnor *pnor) 218 { 219 object_ref(OBJECT(pnor)); 220 object_property_add_const_link(OBJECT(bmc), "pnor", OBJECT(pnor), 221 &error_abort); 222 223 /* Install the HIOMAP protocol handlers to access the PNOR */ 224 ipmi_sim_register_netfn(IPMI_BMC_SIMULATOR(bmc), IPMI_NETFN_OEM, 225 &hiomap_netfn); 226 } 227 228 /* 229 * Instantiate the machine BMC. PowerNV uses the QEMU internal 230 * simulator but it could also be external. 231 */ 232 IPMIBmc *pnv_bmc_create(PnvPnor *pnor) 233 { 234 Object *obj; 235 236 obj = object_new(TYPE_IPMI_BMC_SIMULATOR); 237 object_ref(OBJECT(pnor)); 238 object_property_add_const_link(obj, "pnor", OBJECT(pnor), &error_abort); 239 object_property_set_bool(obj, true, "realized", &error_fatal); 240 241 /* Install the HIOMAP protocol handlers to access the PNOR */ 242 ipmi_sim_register_netfn(IPMI_BMC_SIMULATOR(obj), IPMI_NETFN_OEM, 243 &hiomap_netfn); 244 245 return IPMI_BMC(obj); 246 } 247 248 typedef struct ForeachArgs { 249 const char *name; 250 Object *obj; 251 } ForeachArgs; 252 253 static int bmc_find(Object *child, void *opaque) 254 { 255 ForeachArgs *args = opaque; 256 257 if (object_dynamic_cast(child, args->name)) { 258 if (args->obj) { 259 return 1; 260 } 261 args->obj = child; 262 } 263 return 0; 264 } 265 266 IPMIBmc *pnv_bmc_find(Error **errp) 267 { 268 ForeachArgs args = { TYPE_IPMI_BMC_SIMULATOR, NULL }; 269 int ret; 270 271 ret = object_child_foreach_recursive(object_get_root(), bmc_find, &args); 272 if (ret) { 273 error_setg(errp, "machine should have only one BMC device. " 274 "Use '-nodefaults'"); 275 return NULL; 276 } 277 278 return args.obj ? IPMI_BMC(args.obj) : NULL; 279 } 280