1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * AMD Platform Management Framework Driver - TEE Interface
4 *
5 * Copyright (c) 2023, 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/debugfs.h>
12 #include <linux/tee_drv.h>
13 #include <linux/uuid.h>
14 #include "pmf.h"
15
16 #define MAX_TEE_PARAM 4
17
18 /* Policy binary actions sampling frequency (in ms) */
19 static int pb_actions_ms = MSEC_PER_SEC;
20 /* Sideload policy binaries to debug policy failures */
21 static bool pb_side_load;
22
23 #ifdef CONFIG_AMD_PMF_DEBUG
24 module_param(pb_actions_ms, int, 0644);
25 MODULE_PARM_DESC(pb_actions_ms, "Policy binary actions sampling frequency (default = 1000ms)");
26 module_param(pb_side_load, bool, 0444);
27 MODULE_PARM_DESC(pb_side_load, "Sideload policy binaries debug policy failures");
28 #endif
29
30 static const uuid_t amd_pmf_ta_uuid[] = { UUID_INIT(0xd9b39bf2, 0x66bd, 0x4154, 0xaf, 0xb8, 0x8a,
31 0xcc, 0x2b, 0x2b, 0x60, 0xd6),
32 UUID_INIT(0x6fd93b77, 0x3fb8, 0x524d, 0xb1, 0x2d, 0xc5,
33 0x29, 0xb1, 0x3d, 0x85, 0x43),
34 };
35
amd_pmf_uevent_as_str(unsigned int state)36 static const char *amd_pmf_uevent_as_str(unsigned int state)
37 {
38 switch (state) {
39 case SYSTEM_STATE_S0i3:
40 return "S0i3";
41 case SYSTEM_STATE_S4:
42 return "S4";
43 case SYSTEM_STATE_SCREEN_LOCK:
44 return "SCREEN_LOCK";
45 default:
46 return "Unknown Smart PC event";
47 }
48 }
49
amd_pmf_prepare_args(struct amd_pmf_dev * dev,int cmd,struct tee_ioctl_invoke_arg * arg,struct tee_param * param)50 static void amd_pmf_prepare_args(struct amd_pmf_dev *dev, int cmd,
51 struct tee_ioctl_invoke_arg *arg,
52 struct tee_param *param)
53 {
54 memset(arg, 0, sizeof(*arg));
55 memset(param, 0, MAX_TEE_PARAM * sizeof(*param));
56
57 arg->func = cmd;
58 arg->session = dev->session_id;
59 arg->num_params = MAX_TEE_PARAM;
60
61 /* Fill invoke cmd params */
62 param[0].u.memref.size = sizeof(struct ta_pmf_shared_memory);
63 param[0].attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT;
64 param[0].u.memref.shm = dev->fw_shm_pool;
65 param[0].u.memref.shm_offs = 0;
66 }
67
amd_pmf_update_uevents(struct amd_pmf_dev * dev,u16 event)68 static void amd_pmf_update_uevents(struct amd_pmf_dev *dev, u16 event)
69 {
70 input_report_key(dev->pmf_idev, event, 1); /* key press */
71 input_sync(dev->pmf_idev);
72 input_report_key(dev->pmf_idev, event, 0); /* key release */
73 input_sync(dev->pmf_idev);
74 }
75
amd_pmf_apply_policies(struct amd_pmf_dev * dev,struct ta_pmf_enact_result * out)76 static void amd_pmf_apply_policies(struct amd_pmf_dev *dev, struct ta_pmf_enact_result *out)
77 {
78 u32 val;
79 int idx;
80
81 for (idx = 0; idx < out->actions_count; idx++) {
82 val = out->actions_list[idx].value;
83 switch (out->actions_list[idx].action_index) {
84 case PMF_POLICY_SPL:
85 if (dev->prev_data->spl != val) {
86 amd_pmf_send_cmd(dev, SET_SPL, false, val, NULL);
87 dev_dbg(dev->dev, "update SPL: %u\n", val);
88 dev->prev_data->spl = val;
89 }
90 break;
91
92 case PMF_POLICY_SPPT:
93 if (dev->prev_data->sppt != val) {
94 amd_pmf_send_cmd(dev, SET_SPPT, false, val, NULL);
95 dev_dbg(dev->dev, "update SPPT: %u\n", val);
96 dev->prev_data->sppt = val;
97 }
98 break;
99
100 case PMF_POLICY_FPPT:
101 if (dev->prev_data->fppt != val) {
102 amd_pmf_send_cmd(dev, SET_FPPT, false, val, NULL);
103 dev_dbg(dev->dev, "update FPPT: %u\n", val);
104 dev->prev_data->fppt = val;
105 }
106 break;
107
108 case PMF_POLICY_SPPT_APU_ONLY:
109 if (dev->prev_data->sppt_apuonly != val) {
110 amd_pmf_send_cmd(dev, SET_SPPT_APU_ONLY, false, val, NULL);
111 dev_dbg(dev->dev, "update SPPT_APU_ONLY: %u\n", val);
112 dev->prev_data->sppt_apuonly = val;
113 }
114 break;
115
116 case PMF_POLICY_STT_MIN:
117 if (dev->prev_data->stt_minlimit != val) {
118 amd_pmf_send_cmd(dev, SET_STT_MIN_LIMIT, false, val, NULL);
119 dev_dbg(dev->dev, "update STT_MIN: %u\n", val);
120 dev->prev_data->stt_minlimit = val;
121 }
122 break;
123
124 case PMF_POLICY_STT_SKINTEMP_APU:
125 if (dev->prev_data->stt_skintemp_apu != val) {
126 amd_pmf_send_cmd(dev, SET_STT_LIMIT_APU, false, val, NULL);
127 dev_dbg(dev->dev, "update STT_SKINTEMP_APU: %u\n", val);
128 dev->prev_data->stt_skintemp_apu = val;
129 }
130 break;
131
132 case PMF_POLICY_STT_SKINTEMP_HS2:
133 if (dev->prev_data->stt_skintemp_hs2 != val) {
134 amd_pmf_send_cmd(dev, SET_STT_LIMIT_HS2, false, val, NULL);
135 dev_dbg(dev->dev, "update STT_SKINTEMP_HS2: %u\n", val);
136 dev->prev_data->stt_skintemp_hs2 = val;
137 }
138 break;
139
140 case PMF_POLICY_P3T:
141 if (dev->prev_data->p3t_limit != val) {
142 amd_pmf_send_cmd(dev, SET_P3T, false, val, NULL);
143 dev_dbg(dev->dev, "update P3T: %u\n", val);
144 dev->prev_data->p3t_limit = val;
145 }
146 break;
147
148 case PMF_POLICY_SYSTEM_STATE:
149 switch (val) {
150 case 0:
151 amd_pmf_update_uevents(dev, KEY_SLEEP);
152 break;
153 case 1:
154 amd_pmf_update_uevents(dev, KEY_SUSPEND);
155 break;
156 case 2:
157 amd_pmf_update_uevents(dev, KEY_SCREENLOCK);
158 break;
159 default:
160 dev_err(dev->dev, "Invalid PMF policy system state: %d\n", val);
161 }
162
163 dev_dbg(dev->dev, "update SYSTEM_STATE: %s\n",
164 amd_pmf_uevent_as_str(val));
165 break;
166
167 case PMF_POLICY_BIOS_OUTPUT_1:
168 amd_pmf_smartpc_apply_bios_output(dev, val, BIT(0), 0);
169 break;
170
171 case PMF_POLICY_BIOS_OUTPUT_2:
172 amd_pmf_smartpc_apply_bios_output(dev, val, BIT(1), 1);
173 break;
174
175 case PMF_POLICY_BIOS_OUTPUT_3:
176 amd_pmf_smartpc_apply_bios_output(dev, val, BIT(2), 2);
177 break;
178
179 case PMF_POLICY_BIOS_OUTPUT_4:
180 amd_pmf_smartpc_apply_bios_output(dev, val, BIT(3), 3);
181 break;
182
183 case PMF_POLICY_BIOS_OUTPUT_5:
184 amd_pmf_smartpc_apply_bios_output(dev, val, BIT(4), 4);
185 break;
186
187 case PMF_POLICY_BIOS_OUTPUT_6:
188 amd_pmf_smartpc_apply_bios_output(dev, val, BIT(5), 5);
189 break;
190
191 case PMF_POLICY_BIOS_OUTPUT_7:
192 amd_pmf_smartpc_apply_bios_output(dev, val, BIT(6), 6);
193 break;
194
195 case PMF_POLICY_BIOS_OUTPUT_8:
196 amd_pmf_smartpc_apply_bios_output(dev, val, BIT(7), 7);
197 break;
198
199 case PMF_POLICY_BIOS_OUTPUT_9:
200 amd_pmf_smartpc_apply_bios_output(dev, val, BIT(8), 8);
201 break;
202
203 case PMF_POLICY_BIOS_OUTPUT_10:
204 amd_pmf_smartpc_apply_bios_output(dev, val, BIT(9), 9);
205 break;
206 }
207 }
208 }
209
amd_pmf_invoke_cmd_enact(struct amd_pmf_dev * dev)210 static int amd_pmf_invoke_cmd_enact(struct amd_pmf_dev *dev)
211 {
212 struct ta_pmf_shared_memory *ta_sm = NULL;
213 struct ta_pmf_enact_result *out = NULL;
214 struct ta_pmf_enact_table *in = NULL;
215 struct tee_param param[MAX_TEE_PARAM];
216 struct tee_ioctl_invoke_arg arg;
217 int ret = 0;
218
219 if (!dev->tee_ctx)
220 return -ENODEV;
221
222 memset(dev->shbuf, 0, dev->policy_sz);
223 ta_sm = dev->shbuf;
224 out = &ta_sm->pmf_output.policy_apply_table;
225 in = &ta_sm->pmf_input.enact_table;
226
227 memset(ta_sm, 0, sizeof(*ta_sm));
228 ta_sm->command_id = TA_PMF_COMMAND_POLICY_BUILDER_ENACT_POLICIES;
229 ta_sm->if_version = PMF_TA_IF_VERSION_MAJOR;
230
231 amd_pmf_populate_ta_inputs(dev, in);
232 amd_pmf_prepare_args(dev, TA_PMF_COMMAND_POLICY_BUILDER_ENACT_POLICIES, &arg, param);
233
234 ret = tee_client_invoke_func(dev->tee_ctx, &arg, param);
235 if (ret < 0 || arg.ret != 0) {
236 dev_err(dev->dev, "TEE enact cmd failed. err: %x, ret:%d\n", arg.ret, ret);
237 return ret;
238 }
239
240 if (ta_sm->pmf_result == TA_PMF_TYPE_SUCCESS && out->actions_count) {
241 amd_pmf_dump_ta_inputs(dev, in);
242 dev_dbg(dev->dev, "action count:%u result:%x\n", out->actions_count,
243 ta_sm->pmf_result);
244 amd_pmf_apply_policies(dev, out);
245 }
246
247 return 0;
248 }
249
amd_pmf_invoke_cmd_init(struct amd_pmf_dev * dev)250 static int amd_pmf_invoke_cmd_init(struct amd_pmf_dev *dev)
251 {
252 struct ta_pmf_shared_memory *ta_sm = NULL;
253 struct tee_param param[MAX_TEE_PARAM];
254 struct ta_pmf_init_table *in = NULL;
255 struct tee_ioctl_invoke_arg arg;
256 int ret = 0;
257
258 if (!dev->tee_ctx) {
259 dev_err(dev->dev, "Failed to get TEE context\n");
260 return -ENODEV;
261 }
262
263 dev_dbg(dev->dev, "Policy Binary size: %llu bytes\n", (unsigned long long)dev->policy_sz);
264 memset(dev->shbuf, 0, dev->policy_sz);
265 ta_sm = dev->shbuf;
266 in = &ta_sm->pmf_input.init_table;
267
268 ta_sm->command_id = TA_PMF_COMMAND_POLICY_BUILDER_INITIALIZE;
269 ta_sm->if_version = PMF_TA_IF_VERSION_MAJOR;
270
271 in->metadata_macrocheck = false;
272 in->sku_check = false;
273 in->validate = true;
274 in->frequency = pb_actions_ms;
275 in->policies_table.table_size = dev->policy_sz;
276
277 memcpy(in->policies_table.table, dev->policy_buf, dev->policy_sz);
278 amd_pmf_prepare_args(dev, TA_PMF_COMMAND_POLICY_BUILDER_INITIALIZE, &arg, param);
279
280 ret = tee_client_invoke_func(dev->tee_ctx, &arg, param);
281 if (ret < 0 || arg.ret != 0) {
282 dev_err(dev->dev, "Failed to invoke TEE init cmd. err: %x, ret:%d\n", arg.ret, ret);
283 return ret;
284 }
285
286 return ta_sm->pmf_result;
287 }
288
amd_pmf_invoke_cmd(struct work_struct * work)289 static void amd_pmf_invoke_cmd(struct work_struct *work)
290 {
291 struct amd_pmf_dev *dev = container_of(work, struct amd_pmf_dev, pb_work.work);
292
293 amd_pmf_invoke_cmd_enact(dev);
294 schedule_delayed_work(&dev->pb_work, msecs_to_jiffies(pb_actions_ms));
295 }
296
amd_pmf_start_policy_engine(struct amd_pmf_dev * dev)297 static int amd_pmf_start_policy_engine(struct amd_pmf_dev *dev)
298 {
299 struct cookie_header *header;
300 int res;
301
302 if (dev->policy_sz < POLICY_COOKIE_OFFSET + sizeof(*header))
303 return -EINVAL;
304
305 header = (struct cookie_header *)(dev->policy_buf + POLICY_COOKIE_OFFSET);
306
307 if (header->sign != POLICY_SIGN_COOKIE || !header->length) {
308 dev_dbg(dev->dev, "cookie doesn't match\n");
309 return -EINVAL;
310 }
311
312 if (dev->policy_sz < header->length + 512)
313 return -EINVAL;
314
315 /* Update the actual length */
316 dev->policy_sz = header->length + 512;
317 res = amd_pmf_invoke_cmd_init(dev);
318 if (res == TA_PMF_TYPE_SUCCESS) {
319 /* Now its safe to announce that smart pc is enabled */
320 dev->smart_pc_enabled = true;
321 /*
322 * Start collecting the data from TA FW after a small delay
323 * or else, we might end up getting stale values.
324 */
325 schedule_delayed_work(&dev->pb_work, msecs_to_jiffies(pb_actions_ms * 3));
326 } else {
327 dev_dbg(dev->dev, "ta invoke cmd init failed err: %x\n", res);
328 dev->smart_pc_enabled = false;
329 return res;
330 }
331
332 return 0;
333 }
334
335 #ifdef CONFIG_AMD_PMF_DEBUG
amd_pmf_hex_dump_pb(struct amd_pmf_dev * dev)336 static void amd_pmf_hex_dump_pb(struct amd_pmf_dev *dev)
337 {
338 print_hex_dump_debug("(pb): ", DUMP_PREFIX_OFFSET, 16, 1, dev->policy_buf,
339 dev->policy_sz, false);
340 }
341
amd_pmf_get_pb_data(struct file * filp,const char __user * buf,size_t length,loff_t * pos)342 static ssize_t amd_pmf_get_pb_data(struct file *filp, const char __user *buf,
343 size_t length, loff_t *pos)
344 {
345 struct amd_pmf_dev *dev = filp->private_data;
346 unsigned char *new_policy_buf;
347 int ret;
348
349 /* Policy binary size cannot exceed POLICY_BUF_MAX_SZ */
350 if (length > POLICY_BUF_MAX_SZ || length == 0)
351 return -EINVAL;
352
353 /* re-alloc to the new buffer length of the policy binary */
354 new_policy_buf = memdup_user(buf, length);
355 if (IS_ERR(new_policy_buf))
356 return PTR_ERR(new_policy_buf);
357
358 kfree(dev->policy_buf);
359 dev->policy_buf = new_policy_buf;
360 dev->policy_sz = length;
361
362 amd_pmf_hex_dump_pb(dev);
363 ret = amd_pmf_start_policy_engine(dev);
364 if (ret < 0)
365 return ret;
366
367 return length;
368 }
369
370 static const struct file_operations pb_fops = {
371 .write = amd_pmf_get_pb_data,
372 .open = simple_open,
373 };
374
amd_pmf_open_pb(struct amd_pmf_dev * dev,struct dentry * debugfs_root)375 static void amd_pmf_open_pb(struct amd_pmf_dev *dev, struct dentry *debugfs_root)
376 {
377 dev->esbin = debugfs_create_dir("pb", debugfs_root);
378 debugfs_create_file("update_policy", 0644, dev->esbin, dev, &pb_fops);
379 }
380
amd_pmf_remove_pb(struct amd_pmf_dev * dev)381 static void amd_pmf_remove_pb(struct amd_pmf_dev *dev)
382 {
383 debugfs_remove_recursive(dev->esbin);
384 }
385 #else
amd_pmf_open_pb(struct amd_pmf_dev * dev,struct dentry * debugfs_root)386 static void amd_pmf_open_pb(struct amd_pmf_dev *dev, struct dentry *debugfs_root) {}
amd_pmf_remove_pb(struct amd_pmf_dev * dev)387 static void amd_pmf_remove_pb(struct amd_pmf_dev *dev) {}
amd_pmf_hex_dump_pb(struct amd_pmf_dev * dev)388 static void amd_pmf_hex_dump_pb(struct amd_pmf_dev *dev) {}
389 #endif
390
amd_pmf_amdtee_ta_match(struct tee_ioctl_version_data * ver,const void * data)391 static int amd_pmf_amdtee_ta_match(struct tee_ioctl_version_data *ver, const void *data)
392 {
393 return ver->impl_id == TEE_IMPL_ID_AMDTEE;
394 }
395
amd_pmf_ta_open_session(struct tee_context * ctx,u32 * id,const uuid_t * uuid)396 static int amd_pmf_ta_open_session(struct tee_context *ctx, u32 *id, const uuid_t *uuid)
397 {
398 struct tee_ioctl_open_session_arg sess_arg = {};
399 int rc;
400
401 export_uuid(sess_arg.uuid, uuid);
402 sess_arg.clnt_login = TEE_IOCTL_LOGIN_PUBLIC;
403 sess_arg.num_params = 0;
404
405 rc = tee_client_open_session(ctx, &sess_arg, NULL);
406 if (rc < 0 || sess_arg.ret != 0) {
407 pr_err("Failed to open TEE session err:%#x, rc:%d\n", sess_arg.ret, rc);
408 return rc;
409 }
410
411 *id = sess_arg.session;
412
413 return rc;
414 }
415
amd_pmf_register_input_device(struct amd_pmf_dev * dev)416 static int amd_pmf_register_input_device(struct amd_pmf_dev *dev)
417 {
418 int err;
419
420 dev->pmf_idev = devm_input_allocate_device(dev->dev);
421 if (!dev->pmf_idev)
422 return -ENOMEM;
423
424 dev->pmf_idev->name = "PMF-TA output events";
425 dev->pmf_idev->phys = "amd-pmf/input0";
426
427 input_set_capability(dev->pmf_idev, EV_KEY, KEY_SLEEP);
428 input_set_capability(dev->pmf_idev, EV_KEY, KEY_SCREENLOCK);
429 input_set_capability(dev->pmf_idev, EV_KEY, KEY_SUSPEND);
430
431 err = input_register_device(dev->pmf_idev);
432 if (err) {
433 dev_err(dev->dev, "Failed to register input device: %d\n", err);
434 return err;
435 }
436
437 return 0;
438 }
439
amd_pmf_tee_init(struct amd_pmf_dev * dev,const uuid_t * uuid)440 static int amd_pmf_tee_init(struct amd_pmf_dev *dev, const uuid_t *uuid)
441 {
442 u32 size;
443 int ret;
444
445 dev->tee_ctx = tee_client_open_context(NULL, amd_pmf_amdtee_ta_match, NULL, NULL);
446 if (IS_ERR(dev->tee_ctx)) {
447 dev_err(dev->dev, "Failed to open TEE context\n");
448 return PTR_ERR(dev->tee_ctx);
449 }
450
451 ret = amd_pmf_ta_open_session(dev->tee_ctx, &dev->session_id, uuid);
452 if (ret) {
453 dev_err(dev->dev, "Failed to open TA session (%d)\n", ret);
454 ret = -EINVAL;
455 goto out_ctx;
456 }
457
458 size = sizeof(struct ta_pmf_shared_memory) + dev->policy_sz;
459 dev->fw_shm_pool = tee_shm_alloc_kernel_buf(dev->tee_ctx, size);
460 if (IS_ERR(dev->fw_shm_pool)) {
461 dev_err(dev->dev, "Failed to alloc TEE shared memory\n");
462 ret = PTR_ERR(dev->fw_shm_pool);
463 goto out_sess;
464 }
465
466 dev->shbuf = tee_shm_get_va(dev->fw_shm_pool, 0);
467 if (IS_ERR(dev->shbuf)) {
468 dev_err(dev->dev, "Failed to get TEE virtual address\n");
469 ret = PTR_ERR(dev->shbuf);
470 goto out_shm;
471 }
472 dev_dbg(dev->dev, "TEE init done\n");
473
474 return 0;
475
476 out_shm:
477 tee_shm_free(dev->fw_shm_pool);
478 out_sess:
479 tee_client_close_session(dev->tee_ctx, dev->session_id);
480 out_ctx:
481 tee_client_close_context(dev->tee_ctx);
482
483 return ret;
484 }
485
amd_pmf_tee_deinit(struct amd_pmf_dev * dev)486 static void amd_pmf_tee_deinit(struct amd_pmf_dev *dev)
487 {
488 tee_shm_free(dev->fw_shm_pool);
489 tee_client_close_session(dev->tee_ctx, dev->session_id);
490 tee_client_close_context(dev->tee_ctx);
491 }
492
amd_pmf_init_smart_pc(struct amd_pmf_dev * dev)493 int amd_pmf_init_smart_pc(struct amd_pmf_dev *dev)
494 {
495 bool status;
496 int ret, i;
497
498 ret = apmf_check_smart_pc(dev);
499 if (ret) {
500 /*
501 * Lets not return from here if Smart PC bit is not advertised in
502 * the BIOS. This way, there will be some amount of power savings
503 * to the user with static slider (if enabled).
504 */
505 dev_info(dev->dev, "PMF Smart PC not advertised in BIOS!:%d\n", ret);
506 return -ENODEV;
507 }
508
509 INIT_DELAYED_WORK(&dev->pb_work, amd_pmf_invoke_cmd);
510
511 ret = amd_pmf_set_dram_addr(dev, true);
512 if (ret)
513 goto err_cancel_work;
514
515 dev->policy_base = devm_ioremap_resource(dev->dev, dev->res);
516 if (IS_ERR(dev->policy_base)) {
517 ret = PTR_ERR(dev->policy_base);
518 goto err_free_dram_buf;
519 }
520
521 dev->policy_buf = kzalloc(dev->policy_sz, GFP_KERNEL);
522 if (!dev->policy_buf) {
523 ret = -ENOMEM;
524 goto err_free_dram_buf;
525 }
526
527 memcpy_fromio(dev->policy_buf, dev->policy_base, dev->policy_sz);
528
529 amd_pmf_hex_dump_pb(dev);
530
531 dev->prev_data = kzalloc(sizeof(*dev->prev_data), GFP_KERNEL);
532 if (!dev->prev_data) {
533 ret = -ENOMEM;
534 goto err_free_policy;
535 }
536
537 for (i = 0; i < ARRAY_SIZE(amd_pmf_ta_uuid); i++) {
538 ret = amd_pmf_tee_init(dev, &amd_pmf_ta_uuid[i]);
539 if (ret)
540 goto err_free_prev_data;
541
542 ret = amd_pmf_start_policy_engine(dev);
543 switch (ret) {
544 case TA_PMF_TYPE_SUCCESS:
545 status = true;
546 break;
547 case TA_ERROR_CRYPTO_INVALID_PARAM:
548 case TA_ERROR_CRYPTO_BIN_TOO_LARGE:
549 amd_pmf_tee_deinit(dev);
550 status = false;
551 break;
552 default:
553 ret = -EINVAL;
554 amd_pmf_tee_deinit(dev);
555 goto err_free_prev_data;
556 }
557
558 if (status)
559 break;
560 }
561
562 if (!status && !pb_side_load) {
563 ret = -EINVAL;
564 goto err_free_prev_data;
565 }
566
567 if (pb_side_load)
568 amd_pmf_open_pb(dev, dev->dbgfs_dir);
569
570 ret = amd_pmf_register_input_device(dev);
571 if (ret)
572 goto err_pmf_remove_pb;
573
574 return 0;
575
576 err_pmf_remove_pb:
577 if (pb_side_load && dev->esbin)
578 amd_pmf_remove_pb(dev);
579 amd_pmf_tee_deinit(dev);
580 err_free_prev_data:
581 kfree(dev->prev_data);
582 err_free_policy:
583 kfree(dev->policy_buf);
584 err_free_dram_buf:
585 kfree(dev->buf);
586 err_cancel_work:
587 cancel_delayed_work_sync(&dev->pb_work);
588
589 return ret;
590 }
591
amd_pmf_deinit_smart_pc(struct amd_pmf_dev * dev)592 void amd_pmf_deinit_smart_pc(struct amd_pmf_dev *dev)
593 {
594 if (dev->pmf_idev)
595 input_unregister_device(dev->pmf_idev);
596
597 if (pb_side_load && dev->esbin)
598 amd_pmf_remove_pb(dev);
599
600 cancel_delayed_work_sync(&dev->pb_work);
601 kfree(dev->prev_data);
602 dev->prev_data = NULL;
603 kfree(dev->policy_buf);
604 dev->policy_buf = NULL;
605 kfree(dev->buf);
606 dev->buf = NULL;
607 amd_pmf_tee_deinit(dev);
608 }
609