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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2020-2023 Intel Corporation
4 */
5
6#include <linux/highmem.h>
7#include <linux/moduleparam.h>
8#include <linux/pci.h>
9#include <linux/pm_runtime.h>
10#include <linux/reboot.h>
11
12#include "vpu_boot_api.h"
13#include "ivpu_drv.h"
14#include "ivpu_hw.h"
15#include "ivpu_fw.h"
16#include "ivpu_fw_log.h"
17#include "ivpu_ipc.h"
18#include "ivpu_job.h"
19#include "ivpu_jsm_msg.h"
20#include "ivpu_mmu.h"
21#include "ivpu_pm.h"
22
23static bool ivpu_disable_recovery;
24module_param_named_unsafe(disable_recovery, ivpu_disable_recovery, bool, 0644);
25MODULE_PARM_DESC(disable_recovery, "Disables recovery when VPU hang is detected");
26
27static unsigned long ivpu_tdr_timeout_ms;
28module_param_named(tdr_timeout_ms, ivpu_tdr_timeout_ms, ulong, 0644);
29MODULE_PARM_DESC(tdr_timeout_ms, "Timeout for device hang detection, in milliseconds, 0 - default");
30
31#define PM_RESCHEDULE_LIMIT 5
32
33static void ivpu_pm_prepare_cold_boot(struct ivpu_device *vdev)
34{
35 struct ivpu_fw_info *fw = vdev->fw;
36
37 ivpu_cmdq_reset_all_contexts(vdev);
38 ivpu_ipc_reset(vdev);
39 ivpu_fw_load(vdev);
40 fw->entry_point = fw->cold_boot_entry_point;
41}
42
43static void ivpu_pm_prepare_warm_boot(struct ivpu_device *vdev)
44{
45 struct ivpu_fw_info *fw = vdev->fw;
46 struct vpu_boot_params *bp = ivpu_bo_vaddr(fw->mem);
47
48 if (!bp->save_restore_ret_address) {
49 ivpu_pm_prepare_cold_boot(vdev);
50 return;
51 }
52
53 ivpu_dbg(vdev, FW_BOOT, "Save/restore entry point %llx", bp->save_restore_ret_address);
54 fw->entry_point = bp->save_restore_ret_address;
55}
56
57static int ivpu_suspend(struct ivpu_device *vdev)
58{
59 int ret;
60
61 /* Save PCI state before powering down as it sometimes gets corrupted if NPU hangs */
62 pci_save_state(to_pci_dev(vdev->drm.dev));
63
64 ret = ivpu_shutdown(vdev);
65 if (ret)
66 ivpu_err(vdev, "Failed to shutdown VPU: %d\n", ret);
67
68 pci_set_power_state(to_pci_dev(vdev->drm.dev), PCI_D3hot);
69
70 return ret;
71}
72
73static int ivpu_resume(struct ivpu_device *vdev)
74{
75 int ret;
76
77 pci_set_power_state(to_pci_dev(vdev->drm.dev), PCI_D0);
78 pci_restore_state(to_pci_dev(vdev->drm.dev));
79
80retry:
81 ret = ivpu_hw_power_up(vdev);
82 if (ret) {
83 ivpu_err(vdev, "Failed to power up HW: %d\n", ret);
84 goto err_power_down;
85 }
86
87 ret = ivpu_mmu_enable(vdev);
88 if (ret) {
89 ivpu_err(vdev, "Failed to resume MMU: %d\n", ret);
90 goto err_power_down;
91 }
92
93 ret = ivpu_boot(vdev);
94 if (ret)
95 goto err_mmu_disable;
96
97 return 0;
98
99err_mmu_disable:
100 ivpu_mmu_disable(vdev);
101err_power_down:
102 ivpu_hw_power_down(vdev);
103
104 if (!ivpu_fw_is_cold_boot(vdev)) {
105 ivpu_pm_prepare_cold_boot(vdev);
106 goto retry;
107 } else {
108 ivpu_err(vdev, "Failed to resume the FW: %d\n", ret);
109 }
110
111 return ret;
112}
113
114static void ivpu_pm_recovery_work(struct work_struct *work)
115{
116 struct ivpu_pm_info *pm = container_of(work, struct ivpu_pm_info, recovery_work);
117 struct ivpu_device *vdev = pm->vdev;
118 char *evt[2] = {"IVPU_PM_EVENT=IVPU_RECOVER", NULL};
119 int ret;
120
121 ivpu_err(vdev, "Recovering the VPU (reset #%d)\n", atomic_read(&vdev->pm->reset_counter));
122
123 ret = pm_runtime_resume_and_get(vdev->drm.dev);
124 if (ret)
125 ivpu_err(vdev, "Failed to resume VPU: %d\n", ret);
126
127 ivpu_fw_log_dump(vdev);
128
129 atomic_inc(&vdev->pm->reset_counter);
130 atomic_set(&vdev->pm->reset_pending, 1);
131 down_write(&vdev->pm->reset_lock);
132
133 ivpu_suspend(vdev);
134 ivpu_pm_prepare_cold_boot(vdev);
135 ivpu_jobs_abort_all(vdev);
136
137 ret = ivpu_resume(vdev);
138 if (ret)
139 ivpu_err(vdev, "Failed to resume NPU: %d\n", ret);
140
141 up_write(&vdev->pm->reset_lock);
142 atomic_set(&vdev->pm->reset_pending, 0);
143
144 kobject_uevent_env(&vdev->drm.dev->kobj, KOBJ_CHANGE, evt);
145 pm_runtime_mark_last_busy(vdev->drm.dev);
146 pm_runtime_put_autosuspend(vdev->drm.dev);
147}
148
149void ivpu_pm_trigger_recovery(struct ivpu_device *vdev, const char *reason)
150{
151 ivpu_err(vdev, "Recovery triggered by %s\n", reason);
152
153 if (ivpu_disable_recovery) {
154 ivpu_err(vdev, "Recovery not available when disable_recovery param is set\n");
155 return;
156 }
157
158 if (ivpu_is_fpga(vdev)) {
159 ivpu_err(vdev, "Recovery not available on FPGA\n");
160 return;
161 }
162
163 /* Trigger recovery if it's not in progress */
164 if (atomic_cmpxchg(&vdev->pm->reset_pending, 0, 1) == 0) {
165 ivpu_hw_diagnose_failure(vdev);
166 ivpu_hw_irq_disable(vdev); /* Disable IRQ early to protect from IRQ storm */
167 queue_work(system_long_wq, &vdev->pm->recovery_work);
168 }
169}
170
171static void ivpu_job_timeout_work(struct work_struct *work)
172{
173 struct ivpu_pm_info *pm = container_of(work, struct ivpu_pm_info, job_timeout_work.work);
174 struct ivpu_device *vdev = pm->vdev;
175
176 ivpu_pm_trigger_recovery(vdev, "TDR");
177}
178
179void ivpu_start_job_timeout_detection(struct ivpu_device *vdev)
180{
181 unsigned long timeout_ms = ivpu_tdr_timeout_ms ? ivpu_tdr_timeout_ms : vdev->timeout.tdr;
182
183 /* No-op if already queued */
184 queue_delayed_work(system_wq, &vdev->pm->job_timeout_work, msecs_to_jiffies(timeout_ms));
185}
186
187void ivpu_stop_job_timeout_detection(struct ivpu_device *vdev)
188{
189 cancel_delayed_work_sync(&vdev->pm->job_timeout_work);
190}
191
192int ivpu_pm_suspend_cb(struct device *dev)
193{
194 struct drm_device *drm = dev_get_drvdata(dev);
195 struct ivpu_device *vdev = to_ivpu_device(drm);
196 unsigned long timeout;
197
198 ivpu_dbg(vdev, PM, "Suspend..\n");
199
200 timeout = jiffies + msecs_to_jiffies(vdev->timeout.tdr);
201 while (!ivpu_hw_is_idle(vdev)) {
202 cond_resched();
203 if (time_after_eq(jiffies, timeout)) {
204 ivpu_err(vdev, "Failed to enter idle on system suspend\n");
205 return -EBUSY;
206 }
207 }
208
209 ivpu_jsm_pwr_d0i3_enter(vdev);
210
211 ivpu_suspend(vdev);
212 ivpu_pm_prepare_warm_boot(vdev);
213
214 ivpu_dbg(vdev, PM, "Suspend done.\n");
215
216 return 0;
217}
218
219int ivpu_pm_resume_cb(struct device *dev)
220{
221 struct drm_device *drm = dev_get_drvdata(dev);
222 struct ivpu_device *vdev = to_ivpu_device(drm);
223 int ret;
224
225 ivpu_dbg(vdev, PM, "Resume..\n");
226
227 ret = ivpu_resume(vdev);
228 if (ret)
229 ivpu_err(vdev, "Failed to resume: %d\n", ret);
230
231 ivpu_dbg(vdev, PM, "Resume done.\n");
232
233 return ret;
234}
235
236int ivpu_pm_runtime_suspend_cb(struct device *dev)
237{
238 struct drm_device *drm = dev_get_drvdata(dev);
239 struct ivpu_device *vdev = to_ivpu_device(drm);
240 bool hw_is_idle = true;
241 int ret;
242
243 drm_WARN_ON(&vdev->drm, !xa_empty(&vdev->submitted_jobs_xa));
244 drm_WARN_ON(&vdev->drm, work_pending(&vdev->pm->recovery_work));
245
246 ivpu_dbg(vdev, PM, "Runtime suspend..\n");
247
248 if (!ivpu_hw_is_idle(vdev) && vdev->pm->suspend_reschedule_counter) {
249 ivpu_dbg(vdev, PM, "Failed to enter idle, rescheduling suspend, retries left %d\n",
250 vdev->pm->suspend_reschedule_counter);
251 pm_schedule_suspend(dev, vdev->timeout.reschedule_suspend);
252 vdev->pm->suspend_reschedule_counter--;
253 return -EAGAIN;
254 }
255
256 if (!vdev->pm->suspend_reschedule_counter)
257 hw_is_idle = false;
258 else if (ivpu_jsm_pwr_d0i3_enter(vdev))
259 hw_is_idle = false;
260
261 ret = ivpu_suspend(vdev);
262 if (ret)
263 ivpu_err(vdev, "Failed to set suspend VPU: %d\n", ret);
264
265 if (!hw_is_idle) {
266 ivpu_err(vdev, "VPU failed to enter idle, force suspended.\n");
267 ivpu_fw_log_dump(vdev);
268 ivpu_pm_prepare_cold_boot(vdev);
269 } else {
270 ivpu_pm_prepare_warm_boot(vdev);
271 }
272
273 vdev->pm->suspend_reschedule_counter = PM_RESCHEDULE_LIMIT;
274
275 ivpu_dbg(vdev, PM, "Runtime suspend done.\n");
276
277 return 0;
278}
279
280int ivpu_pm_runtime_resume_cb(struct device *dev)
281{
282 struct drm_device *drm = dev_get_drvdata(dev);
283 struct ivpu_device *vdev = to_ivpu_device(drm);
284 int ret;
285
286 ivpu_dbg(vdev, PM, "Runtime resume..\n");
287
288 ret = ivpu_resume(vdev);
289 if (ret)
290 ivpu_err(vdev, "Failed to set RESUME state: %d\n", ret);
291
292 ivpu_dbg(vdev, PM, "Runtime resume done.\n");
293
294 return ret;
295}
296
297int ivpu_rpm_get(struct ivpu_device *vdev)
298{
299 int ret;
300
301 ret = pm_runtime_resume_and_get(vdev->drm.dev);
302 if (!drm_WARN_ON(&vdev->drm, ret < 0))
303 vdev->pm->suspend_reschedule_counter = PM_RESCHEDULE_LIMIT;
304
305 return ret;
306}
307
308int ivpu_rpm_get_if_active(struct ivpu_device *vdev)
309{
310 int ret;
311
312 ret = pm_runtime_get_if_active(vdev->drm.dev, false);
313 drm_WARN_ON(&vdev->drm, ret < 0);
314
315 return ret;
316}
317
318void ivpu_rpm_put(struct ivpu_device *vdev)
319{
320 pm_runtime_mark_last_busy(vdev->drm.dev);
321 pm_runtime_put_autosuspend(vdev->drm.dev);
322}
323
324void ivpu_pm_reset_prepare_cb(struct pci_dev *pdev)
325{
326 struct ivpu_device *vdev = pci_get_drvdata(pdev);
327
328 ivpu_dbg(vdev, PM, "Pre-reset..\n");
329 atomic_inc(&vdev->pm->reset_counter);
330 atomic_set(&vdev->pm->reset_pending, 1);
331
332 pm_runtime_get_sync(vdev->drm.dev);
333 down_write(&vdev->pm->reset_lock);
334 ivpu_prepare_for_reset(vdev);
335 ivpu_hw_reset(vdev);
336 ivpu_pm_prepare_cold_boot(vdev);
337 ivpu_jobs_abort_all(vdev);
338 ivpu_dbg(vdev, PM, "Pre-reset done.\n");
339}
340
341void ivpu_pm_reset_done_cb(struct pci_dev *pdev)
342{
343 struct ivpu_device *vdev = pci_get_drvdata(pdev);
344 int ret;
345
346 ivpu_dbg(vdev, PM, "Post-reset..\n");
347 ret = ivpu_resume(vdev);
348 if (ret)
349 ivpu_err(vdev, "Failed to set RESUME state: %d\n", ret);
350 up_write(&vdev->pm->reset_lock);
351 atomic_set(&vdev->pm->reset_pending, 0);
352 ivpu_dbg(vdev, PM, "Post-reset done.\n");
353
354 pm_runtime_mark_last_busy(vdev->drm.dev);
355 pm_runtime_put_autosuspend(vdev->drm.dev);
356}
357
358void ivpu_pm_init(struct ivpu_device *vdev)
359{
360 struct device *dev = vdev->drm.dev;
361 struct ivpu_pm_info *pm = vdev->pm;
362 int delay;
363
364 pm->vdev = vdev;
365 pm->suspend_reschedule_counter = PM_RESCHEDULE_LIMIT;
366
367 init_rwsem(&pm->reset_lock);
368 atomic_set(&pm->reset_pending, 0);
369 atomic_set(&pm->reset_counter, 0);
370
371 INIT_WORK(&pm->recovery_work, ivpu_pm_recovery_work);
372 INIT_DELAYED_WORK(&pm->job_timeout_work, ivpu_job_timeout_work);
373
374 if (ivpu_disable_recovery)
375 delay = -1;
376 else
377 delay = vdev->timeout.autosuspend;
378
379 pm_runtime_use_autosuspend(dev);
380 pm_runtime_set_autosuspend_delay(dev, delay);
381
382 ivpu_dbg(vdev, PM, "Autosuspend delay = %d\n", delay);
383}
384
385void ivpu_pm_cancel_recovery(struct ivpu_device *vdev)
386{
387 drm_WARN_ON(&vdev->drm, delayed_work_pending(&vdev->pm->job_timeout_work));
388 cancel_work_sync(&vdev->pm->recovery_work);
389}
390
391void ivpu_pm_enable(struct ivpu_device *vdev)
392{
393 struct device *dev = vdev->drm.dev;
394
395 pm_runtime_set_active(dev);
396 pm_runtime_allow(dev);
397 pm_runtime_mark_last_busy(dev);
398 pm_runtime_put_autosuspend(dev);
399}
400
401void ivpu_pm_disable(struct ivpu_device *vdev)
402{
403 pm_runtime_get_noresume(vdev->drm.dev);
404 pm_runtime_forbid(vdev->drm.dev);
405}