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1// SPDX-License-Identifier: GPL-2.02/*3 * AMD Platform Management Framework Driver4 *5 * Copyright (c) 2022, Advanced Micro Devices, Inc.6 * All Rights Reserved.7 *8 * Author: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>9 */10 11#include <linux/acpi.h>12#include "pmf.h"13 14#define APMF_CQL_NOTIFICATION 215#define APMF_AMT_NOTIFICATION 316 17static union acpi_object *apmf_if_call(struct amd_pmf_dev *pdev, int fn, struct acpi_buffer *param)18{19 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };20 acpi_handle ahandle = ACPI_HANDLE(pdev->dev);21 struct acpi_object_list apmf_if_arg_list;22 union acpi_object apmf_if_args[2];23 acpi_status status;24 25 apmf_if_arg_list.count = 2;26 apmf_if_arg_list.pointer = &apmf_if_args[0];27 28 apmf_if_args[0].type = ACPI_TYPE_INTEGER;29 apmf_if_args[0].integer.value = fn;30 31 if (param) {32 apmf_if_args[1].type = ACPI_TYPE_BUFFER;33 apmf_if_args[1].buffer.length = param->length;34 apmf_if_args[1].buffer.pointer = param->pointer;35 } else {36 apmf_if_args[1].type = ACPI_TYPE_INTEGER;37 apmf_if_args[1].integer.value = 0;38 }39 40 status = acpi_evaluate_object(ahandle, "APMF", &apmf_if_arg_list, &buffer);41 if (ACPI_FAILURE(status)) {42 dev_err(pdev->dev, "APMF method:%d call failed\n", fn);43 kfree(buffer.pointer);44 return NULL;45 }46 47 return buffer.pointer;48}49 50static int apmf_if_call_store_buffer(struct amd_pmf_dev *pdev, int fn, void *dest, size_t out_sz)51{52 union acpi_object *info;53 size_t size;54 int err = 0;55 56 info = apmf_if_call(pdev, fn, NULL);57 if (!info)58 return -EIO;59 60 if (info->type != ACPI_TYPE_BUFFER) {61 dev_err(pdev->dev, "object is not a buffer\n");62 err = -EINVAL;63 goto out;64 }65 66 if (info->buffer.length < 2) {67 dev_err(pdev->dev, "buffer too small\n");68 err = -EINVAL;69 goto out;70 }71 72 size = *(u16 *)info->buffer.pointer;73 if (info->buffer.length < size) {74 dev_err(pdev->dev, "buffer smaller then headersize %u < %zu\n",75 info->buffer.length, size);76 err = -EINVAL;77 goto out;78 }79 80 if (size < out_sz) {81 dev_err(pdev->dev, "buffer too small %zu\n", size);82 err = -EINVAL;83 goto out;84 }85 86 memcpy(dest, info->buffer.pointer, out_sz);87 88out:89 kfree(info);90 return err;91}92 93static union acpi_object *apts_if_call(struct amd_pmf_dev *pdev, u32 state_index)94{95 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };96 acpi_handle ahandle = ACPI_HANDLE(pdev->dev);97 struct acpi_object_list apts_if_arg_list;98 union acpi_object apts_if_args[3];99 acpi_status status;100 101 apts_if_arg_list.count = 3;102 apts_if_arg_list.pointer = &apts_if_args[0];103 104 apts_if_args[0].type = ACPI_TYPE_INTEGER;105 apts_if_args[0].integer.value = 1;106 apts_if_args[1].type = ACPI_TYPE_INTEGER;107 apts_if_args[1].integer.value = state_index;108 apts_if_args[2].type = ACPI_TYPE_INTEGER;109 apts_if_args[2].integer.value = 0;110 111 status = acpi_evaluate_object(ahandle, "APTS", &apts_if_arg_list, &buffer);112 if (ACPI_FAILURE(status)) {113 dev_err(pdev->dev, "APTS state_idx:%u call failed\n", state_index);114 kfree(buffer.pointer);115 return NULL;116 }117 118 return buffer.pointer;119}120 121static int apts_if_call_store_buffer(struct amd_pmf_dev *pdev,122 u32 index, void *data, size_t out_sz)123{124 union acpi_object *info;125 size_t size;126 int err = 0;127 128 info = apts_if_call(pdev, index);129 if (!info)130 return -EIO;131 132 if (info->type != ACPI_TYPE_BUFFER) {133 dev_err(pdev->dev, "object is not a buffer\n");134 err = -EINVAL;135 goto out;136 }137 138 size = *(u16 *)info->buffer.pointer;139 if (info->buffer.length < size) {140 dev_err(pdev->dev, "buffer smaller than header size %u < %zu\n",141 info->buffer.length, size);142 err = -EINVAL;143 goto out;144 }145 146 if (size < out_sz) {147 dev_err(pdev->dev, "buffer too small %zu\n", size);148 err = -EINVAL;149 goto out;150 }151 152 memcpy(data, info->buffer.pointer, out_sz);153out:154 kfree(info);155 return err;156}157 158int is_apmf_func_supported(struct amd_pmf_dev *pdev, unsigned long index)159{160 /* If bit-n is set, that indicates function n+1 is supported */161 return !!(pdev->supported_func & BIT(index - 1));162}163 164int apts_get_static_slider_granular_v2(struct amd_pmf_dev *pdev,165 struct amd_pmf_apts_granular_output *data, u32 apts_idx)166{167 if (!is_apmf_func_supported(pdev, APMF_FUNC_STATIC_SLIDER_GRANULAR))168 return -EINVAL;169 170 return apts_if_call_store_buffer(pdev, apts_idx, data, sizeof(*data));171}172 173int apmf_get_static_slider_granular_v2(struct amd_pmf_dev *pdev,174 struct apmf_static_slider_granular_output_v2 *data)175{176 if (!is_apmf_func_supported(pdev, APMF_FUNC_STATIC_SLIDER_GRANULAR))177 return -EINVAL;178 179 return apmf_if_call_store_buffer(pdev, APMF_FUNC_STATIC_SLIDER_GRANULAR,180 data, sizeof(*data));181}182 183int apmf_get_static_slider_granular(struct amd_pmf_dev *pdev,184 struct apmf_static_slider_granular_output *data)185{186 if (!is_apmf_func_supported(pdev, APMF_FUNC_STATIC_SLIDER_GRANULAR))187 return -EINVAL;188 189 return apmf_if_call_store_buffer(pdev, APMF_FUNC_STATIC_SLIDER_GRANULAR,190 data, sizeof(*data));191}192 193int apmf_os_power_slider_update(struct amd_pmf_dev *pdev, u8 event)194{195 struct os_power_slider args;196 struct acpi_buffer params;197 union acpi_object *info;198 199 args.size = sizeof(args);200 args.slider_event = event;201 202 params.length = sizeof(args);203 params.pointer = (void *)&args;204 205 info = apmf_if_call(pdev, APMF_FUNC_OS_POWER_SLIDER_UPDATE, ¶ms);206 if (!info)207 return -EIO;208 209 kfree(info);210 return 0;211}212 213static void apmf_sbios_heartbeat_notify(struct work_struct *work)214{215 struct amd_pmf_dev *dev = container_of(work, struct amd_pmf_dev, heart_beat.work);216 union acpi_object *info;217 218 dev_dbg(dev->dev, "Sending heartbeat to SBIOS\n");219 info = apmf_if_call(dev, APMF_FUNC_SBIOS_HEARTBEAT, NULL);220 if (!info)221 return;222 223 schedule_delayed_work(&dev->heart_beat, msecs_to_jiffies(dev->hb_interval * 1000));224 kfree(info);225}226 227int amd_pmf_notify_sbios_heartbeat_event_v2(struct amd_pmf_dev *dev, u8 flag)228{229 struct sbios_hb_event_v2 args = { };230 struct acpi_buffer params;231 union acpi_object *info;232 233 args.size = sizeof(args);234 235 switch (flag) {236 case ON_LOAD:237 args.load = 1;238 break;239 case ON_UNLOAD:240 args.unload = 1;241 break;242 case ON_SUSPEND:243 args.suspend = 1;244 break;245 case ON_RESUME:246 args.resume = 1;247 break;248 default:249 dev_dbg(dev->dev, "Failed to send v2 heartbeat event, flag:0x%x\n", flag);250 return -EINVAL;251 }252 253 params.length = sizeof(args);254 params.pointer = &args;255 256 info = apmf_if_call(dev, APMF_FUNC_SBIOS_HEARTBEAT_V2, ¶ms);257 if (!info)258 return -EIO;259 260 kfree(info);261 return 0;262}263 264int apmf_update_fan_idx(struct amd_pmf_dev *pdev, bool manual, u32 idx)265{266 union acpi_object *info;267 struct apmf_fan_idx args;268 struct acpi_buffer params;269 270 args.size = sizeof(args);271 args.fan_ctl_mode = manual;272 args.fan_ctl_idx = idx;273 274 params.length = sizeof(args);275 params.pointer = (void *)&args;276 277 info = apmf_if_call(pdev, APMF_FUNC_SET_FAN_IDX, ¶ms);278 if (!info)279 return -EIO;280 281 kfree(info);282 return 0;283}284 285static int apmf_notify_smart_pc_update(struct amd_pmf_dev *pdev, u32 val, u32 preq, u32 index)286{287 struct amd_pmf_notify_smart_pc_update args;288 struct acpi_buffer params;289 union acpi_object *info;290 291 args.size = sizeof(args);292 args.pending_req = preq;293 args.custom_bios[index] = val;294 295 params.length = sizeof(args);296 params.pointer = &args;297 298 info = apmf_if_call(pdev, APMF_FUNC_NOTIFY_SMART_PC_UPDATES, ¶ms);299 if (!info)300 return -EIO;301 302 kfree(info);303 dev_dbg(pdev->dev, "Notify smart pc update, val: %u\n", val);304 305 return 0;306}307 308int apmf_get_auto_mode_def(struct amd_pmf_dev *pdev, struct apmf_auto_mode *data)309{310 return apmf_if_call_store_buffer(pdev, APMF_FUNC_AUTO_MODE, data, sizeof(*data));311}312 313int apmf_get_sbios_requests_v2(struct amd_pmf_dev *pdev, struct apmf_sbios_req_v2 *req)314{315 return apmf_if_call_store_buffer(pdev, APMF_FUNC_SBIOS_REQUESTS, req, sizeof(*req));316}317 318int apmf_get_sbios_requests(struct amd_pmf_dev *pdev, struct apmf_sbios_req *req)319{320 return apmf_if_call_store_buffer(pdev, APMF_FUNC_SBIOS_REQUESTS,321 req, sizeof(*req));322}323 324static void apmf_event_handler(acpi_handle handle, u32 event, void *data)325{326 struct amd_pmf_dev *pmf_dev = data;327 struct apmf_sbios_req req;328 int ret;329 330 mutex_lock(&pmf_dev->update_mutex);331 ret = apmf_get_sbios_requests(pmf_dev, &req);332 if (ret) {333 dev_err(pmf_dev->dev, "Failed to get SBIOS requests:%d\n", ret);334 goto out;335 }336 337 if (req.pending_req & BIT(APMF_AMT_NOTIFICATION)) {338 dev_dbg(pmf_dev->dev, "AMT is supported and notifications %s\n",339 req.amt_event ? "Enabled" : "Disabled");340 pmf_dev->amt_enabled = !!req.amt_event;341 342 if (pmf_dev->amt_enabled)343 amd_pmf_handle_amt(pmf_dev);344 else345 amd_pmf_reset_amt(pmf_dev);346 }347 348 if (req.pending_req & BIT(APMF_CQL_NOTIFICATION)) {349 dev_dbg(pmf_dev->dev, "CQL is supported and notifications %s\n",350 req.cql_event ? "Enabled" : "Disabled");351 352 /* update the target mode information */353 if (pmf_dev->amt_enabled)354 amd_pmf_update_2_cql(pmf_dev, req.cql_event);355 }356out:357 mutex_unlock(&pmf_dev->update_mutex);358}359 360static int apmf_if_verify_interface(struct amd_pmf_dev *pdev)361{362 struct apmf_verify_interface output;363 int err;364 365 err = apmf_if_call_store_buffer(pdev, APMF_FUNC_VERIFY_INTERFACE, &output, sizeof(output));366 if (err)367 return err;368 369 /* only set if not already set by a quirk */370 if (!pdev->supported_func)371 pdev->supported_func = output.supported_functions;372 373 dev_dbg(pdev->dev, "supported functions:0x%x notifications:0x%x version:%u\n",374 output.supported_functions, output.notification_mask, output.version);375 376 pdev->pmf_if_version = output.version;377 378 return 0;379}380 381static int apmf_get_system_params(struct amd_pmf_dev *dev)382{383 struct apmf_system_params params;384 int err;385 386 if (!is_apmf_func_supported(dev, APMF_FUNC_GET_SYS_PARAMS))387 return -EINVAL;388 389 err = apmf_if_call_store_buffer(dev, APMF_FUNC_GET_SYS_PARAMS, ¶ms, sizeof(params));390 if (err)391 return err;392 393 dev_dbg(dev->dev, "system params mask:0x%x flags:0x%x cmd_code:0x%x heartbeat:%d\n",394 params.valid_mask,395 params.flags,396 params.command_code,397 params.heartbeat_int);398 params.flags = params.flags & params.valid_mask;399 dev->hb_interval = params.heartbeat_int;400 401 return 0;402}403 404int apmf_get_dyn_slider_def_ac(struct amd_pmf_dev *pdev, struct apmf_dyn_slider_output *data)405{406 return apmf_if_call_store_buffer(pdev, APMF_FUNC_DYN_SLIDER_AC, data, sizeof(*data));407}408 409int apmf_get_dyn_slider_def_dc(struct amd_pmf_dev *pdev, struct apmf_dyn_slider_output *data)410{411 return apmf_if_call_store_buffer(pdev, APMF_FUNC_DYN_SLIDER_DC, data, sizeof(*data));412}413 414int apmf_install_handler(struct amd_pmf_dev *pmf_dev)415{416 acpi_handle ahandle = ACPI_HANDLE(pmf_dev->dev);417 acpi_status status;418 419 /* Install the APMF Notify handler */420 if (is_apmf_func_supported(pmf_dev, APMF_FUNC_AUTO_MODE) &&421 is_apmf_func_supported(pmf_dev, APMF_FUNC_SBIOS_REQUESTS)) {422 status = acpi_install_notify_handler(ahandle, ACPI_ALL_NOTIFY,423 apmf_event_handler, pmf_dev);424 if (ACPI_FAILURE(status)) {425 dev_err(pmf_dev->dev, "failed to install notify handler\n");426 return -ENODEV;427 }428 429 /* Call the handler once manually to catch up with possibly missed notifies. */430 apmf_event_handler(ahandle, 0, pmf_dev);431 }432 433 return 0;434}435 436static acpi_status apmf_walk_resources(struct acpi_resource *res, void *data)437{438 struct amd_pmf_dev *dev = data;439 440 switch (res->type) {441 case ACPI_RESOURCE_TYPE_ADDRESS64:442 dev->policy_addr = res->data.address64.address.minimum;443 dev->policy_sz = res->data.address64.address.address_length;444 break;445 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:446 dev->policy_addr = res->data.fixed_memory32.address;447 dev->policy_sz = res->data.fixed_memory32.address_length;448 break;449 }450 451 if (!dev->policy_addr || dev->policy_sz > POLICY_BUF_MAX_SZ || dev->policy_sz == 0) {452 pr_err("Incorrect Policy params, possibly a SBIOS bug\n");453 return AE_ERROR;454 }455 456 return AE_OK;457}458 459int apmf_check_smart_pc(struct amd_pmf_dev *pmf_dev)460{461 acpi_handle ahandle = ACPI_HANDLE(pmf_dev->dev);462 acpi_status status;463 464 status = acpi_walk_resources(ahandle, METHOD_NAME__CRS, apmf_walk_resources, pmf_dev);465 if (ACPI_FAILURE(status)) {466 dev_dbg(pmf_dev->dev, "acpi_walk_resources failed :%d\n", status);467 return -EINVAL;468 }469 470 return 0;471}472 473int amd_pmf_smartpc_apply_bios_output(struct amd_pmf_dev *dev, u32 val, u32 preq, u32 idx)474{475 if (!is_apmf_func_supported(dev, APMF_FUNC_NOTIFY_SMART_PC_UPDATES))476 return -EINVAL;477 478 return apmf_notify_smart_pc_update(dev, val, preq, idx);479}480 481void apmf_acpi_deinit(struct amd_pmf_dev *pmf_dev)482{483 acpi_handle ahandle = ACPI_HANDLE(pmf_dev->dev);484 485 if (pmf_dev->hb_interval && pmf_dev->pmf_if_version == PMF_IF_V1)486 cancel_delayed_work_sync(&pmf_dev->heart_beat);487 488 if (is_apmf_func_supported(pmf_dev, APMF_FUNC_AUTO_MODE) &&489 is_apmf_func_supported(pmf_dev, APMF_FUNC_SBIOS_REQUESTS))490 acpi_remove_notify_handler(ahandle, ACPI_ALL_NOTIFY, apmf_event_handler);491}492 493int apmf_acpi_init(struct amd_pmf_dev *pmf_dev)494{495 int ret;496 497 ret = apmf_if_verify_interface(pmf_dev);498 if (ret) {499 dev_err(pmf_dev->dev, "APMF verify interface failed :%d\n", ret);500 goto out;501 }502 503 ret = apmf_get_system_params(pmf_dev);504 if (ret) {505 dev_dbg(pmf_dev->dev, "APMF apmf_get_system_params failed :%d\n", ret);506 goto out;507 }508 509 if (pmf_dev->hb_interval && pmf_dev->pmf_if_version == PMF_IF_V1) {510 /* send heartbeats only if the interval is not zero */511 INIT_DELAYED_WORK(&pmf_dev->heart_beat, apmf_sbios_heartbeat_notify);512 schedule_delayed_work(&pmf_dev->heart_beat, 0);513 }514 515out:516 return ret;517}518