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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 | // SPDX-License-Identifier: GPL-2.0+ /* * SCMI (System Control and Management Interface) utility command * * Copyright (c) 2023 Linaro Limited * Author: AKASHI Takahiro */ #include <command.h> #include <exports.h> #include <scmi_agent.h> #include <scmi_agent-uclass.h> #include <stdlib.h> #include <asm/types.h> #include <dm/device.h> #include <dm/uclass.h> /* uclass_get_device */ #include <linux/bitfield.h> #include <linux/bitops.h> struct { enum scmi_std_protocol id; const char *name; } protocol_name[] = { {SCMI_PROTOCOL_ID_BASE, "Base"}, {SCMI_PROTOCOL_ID_POWER_DOMAIN, "Power domain management"}, {SCMI_PROTOCOL_ID_SYSTEM, "System power management"}, {SCMI_PROTOCOL_ID_PERF, "Performance domain management"}, {SCMI_PROTOCOL_ID_CLOCK, "Clock management"}, {SCMI_PROTOCOL_ID_SENSOR, "Sensor management"}, {SCMI_PROTOCOL_ID_RESET_DOMAIN, "Reset domain management"}, {SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN, "Voltage domain management"}, }; /** * get_agent() - get SCMI agent device * * Return: Pointer to SCMI agent device on success, NULL on failure */ static struct udevice *get_agent(void) { struct udevice *agent; if (uclass_get_device(UCLASS_SCMI_AGENT, 0, &agent)) { printf("Cannot find any SCMI agent\n"); return NULL; } return agent; } /** * get_base_proto() - get SCMI base protocol device * @agent: SCMI agent device * * Return: Pointer to SCMI base protocol device on success, * NULL on failure */ static struct udevice *get_base_proto(struct udevice *agent) { struct udevice *base_proto; if (!agent) { agent = get_agent(); if (!agent) return NULL; } base_proto = scmi_get_protocol(agent, SCMI_PROTOCOL_ID_BASE); if (!base_proto) { printf("SCMI base protocol not found\n"); return NULL; } return base_proto; } /** * get_proto_name() - get the name of SCMI protocol * * @id: SCMI Protocol ID * * Get the printable name of the protocol, @id * * Return: Name string on success, NULL on failure */ static const char *get_proto_name(enum scmi_std_protocol id) { int i; for (i = 0; i < ARRAY_SIZE(protocol_name); i++) if (id == protocol_name[i].id) return protocol_name[i].name; return NULL; } /** * do_scmi_info() - get the information of SCMI services * * @cmdtp: Command table * @flag: Command flag * @argc: Number of arguments * @argv: Argument array * * Get the information of SCMI services using various interfaces * provided by the Base protocol. * * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure */ static int do_scmi_info(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[]) { struct udevice *agent, *base_proto; u32 agent_id, num_protocols; u8 *agent_name, *protocols; int i, ret; if (argc != 1) return CMD_RET_USAGE; agent = get_agent(); if (!agent) return CMD_RET_FAILURE; base_proto = get_base_proto(agent); if (!base_proto) return CMD_RET_FAILURE; printf("SCMI device: %s\n", agent->name); printf(" protocol version: 0x%x\n", scmi_version(agent)); printf(" # of agents: %d\n", scmi_num_agents(agent)); for (i = 0; i < scmi_num_agents(agent); i++) { ret = scmi_base_discover_agent(base_proto, i, &agent_id, &agent_name); if (ret) { if (ret != -EOPNOTSUPP) printf("base_discover_agent() failed for id: %d (%d)\n", i, ret); break; } printf(" %c%2d: %s\n", i == scmi_agent_id(agent) ? '>' : ' ', i, agent_name); free(agent_name); } printf(" # of protocols: %d\n", scmi_num_protocols(agent)); num_protocols = scmi_num_protocols(agent); protocols = scmi_protocols(agent); if (protocols) for (i = 0; i < num_protocols; i++) printf(" %s\n", get_proto_name(protocols[i])); printf(" vendor: %s\n", scmi_vendor(agent)); printf(" sub vendor: %s\n", scmi_sub_vendor(agent)); printf(" impl version: 0x%x\n", scmi_impl_version(agent)); return CMD_RET_SUCCESS; } /** * do_scmi_set_dev() - set access permission to device * * @cmdtp: Command table * @flag: Command flag * @argc: Number of arguments * @argv: Argument array * * Set access permission to device with SCMI_BASE_SET_DEVICE_PERMISSIONS * * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure */ static int do_scmi_set_dev(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[]) { u32 agent_id, device_id, flags, attributes; char *end; struct udevice *base_proto; int ret; if (argc != 4) return CMD_RET_USAGE; agent_id = simple_strtoul(argv[1], &end, 16); if (*end != '\0') return CMD_RET_USAGE; device_id = simple_strtoul(argv[2], &end, 16); if (*end != '\0') return CMD_RET_USAGE; flags = simple_strtoul(argv[3], &end, 16); if (*end != '\0') return CMD_RET_USAGE; base_proto = get_base_proto(NULL); if (!base_proto) return CMD_RET_FAILURE; ret = scmi_base_protocol_message_attrs(base_proto, SCMI_BASE_SET_DEVICE_PERMISSIONS, &attributes); if (ret) { printf("This operation is not supported\n"); return CMD_RET_FAILURE; } ret = scmi_base_set_device_permissions(base_proto, agent_id, device_id, flags); if (ret) { printf("%s access to device:%u failed (%d)\n", flags ? "Allowing" : "Denying", device_id, ret); return CMD_RET_FAILURE; } return CMD_RET_SUCCESS; } /** * do_scmi_set_proto() - set protocol permission to device * * @cmdtp: Command table * @flag: Command flag * @argc: Number of arguments * @argv: Argument array * * Set protocol permission to device with SCMI_BASE_SET_PROTOCOL_PERMISSIONS * * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure */ static int do_scmi_set_proto(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[]) { u32 agent_id, device_id, protocol_id, flags, attributes; char *end; struct udevice *base_proto; int ret; if (argc != 5) return CMD_RET_USAGE; agent_id = simple_strtoul(argv[1], &end, 16); if (*end != '\0') return CMD_RET_USAGE; device_id = simple_strtoul(argv[2], &end, 16); if (*end != '\0') return CMD_RET_USAGE; protocol_id = simple_strtoul(argv[3], &end, 16); if (*end != '\0') return CMD_RET_USAGE; flags = simple_strtoul(argv[4], &end, 16); if (*end != '\0') return CMD_RET_USAGE; base_proto = get_base_proto(NULL); if (!base_proto) return CMD_RET_FAILURE; ret = scmi_base_protocol_message_attrs(base_proto, SCMI_BASE_SET_PROTOCOL_PERMISSIONS, &attributes); if (ret) { printf("This operation is not supported\n"); return CMD_RET_FAILURE; } ret = scmi_base_set_protocol_permissions(base_proto, agent_id, device_id, protocol_id, flags); if (ret) { printf("%s access to protocol:0x%x on device:%u failed (%d)\n", flags ? "Allowing" : "Denying", protocol_id, device_id, ret); return CMD_RET_FAILURE; } return CMD_RET_SUCCESS; } /** * do_scmi_reset() - reset platform resource settings * * @cmdtp: Command table * @flag: Command flag * @argc: Number of arguments * @argv: Argument array * * Reset platform resource settings with BASE_RESET_AGENT_CONFIGURATION * * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure */ static int do_scmi_reset(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[]) { u32 agent_id, flags, attributes; char *end; struct udevice *base_proto; int ret; if (argc != 3) return CMD_RET_USAGE; agent_id = simple_strtoul(argv[1], &end, 16); if (*end != '\0') return CMD_RET_USAGE; flags = simple_strtoul(argv[2], &end, 16); if (*end != '\0') return CMD_RET_USAGE; base_proto = get_base_proto(NULL); if (!base_proto) return CMD_RET_FAILURE; ret = scmi_base_protocol_message_attrs(base_proto, SCMI_BASE_RESET_AGENT_CONFIGURATION, &attributes); if (ret) { printf("Reset is not supported\n"); return CMD_RET_FAILURE; } ret = scmi_base_reset_agent_configuration(base_proto, agent_id, flags); if (ret) { printf("Reset failed (%d)\n", ret); return CMD_RET_FAILURE; } return CMD_RET_SUCCESS; } static struct cmd_tbl cmd_scmi_sub[] = { U_BOOT_CMD_MKENT(info, CONFIG_SYS_MAXARGS, 1, do_scmi_info, "", ""), U_BOOT_CMD_MKENT(perm_dev, CONFIG_SYS_MAXARGS, 1, do_scmi_set_dev, "", ""), U_BOOT_CMD_MKENT(perm_proto, CONFIG_SYS_MAXARGS, 1, do_scmi_set_proto, "", ""), U_BOOT_CMD_MKENT(reset, CONFIG_SYS_MAXARGS, 1, do_scmi_reset, "", ""), }; /** * do_scmi() - SCMI utility * * @cmdtp: Command table * @flag: Command flag * @argc: Number of arguments * @argv: Argument array * * Provide user interfaces to SCMI protocols. * * Return: CMD_RET_SUCCESS on success, * CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure */ static int do_scmi(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) { struct cmd_tbl *cp; if (argc < 2) return CMD_RET_USAGE; argc--; argv++; cp = find_cmd_tbl(argv[0], cmd_scmi_sub, ARRAY_SIZE(cmd_scmi_sub)); if (!cp) return CMD_RET_USAGE; return cp->cmd(cmdtp, flag, argc, argv); } U_BOOT_LONGHELP(scmi, " - SCMI utility\n" " info - get the info of SCMI services\n" " perm_dev <agent-id in hex> <device-id in hex> <flags in hex>\n" " - set access permission to device\n" " perm_proto <agent-id in hex> <device-id in hex> <protocol-id in hex> <flags in hex>\n" " - set protocol permission to device\n" " reset <agent-id in hex> <flags in hex>\n" " - reset platform resource settings\n"); U_BOOT_CMD(scmi, CONFIG_SYS_MAXARGS, 0, do_scmi, "SCMI utility", scmi_help_text); |