summaryrefslogtreecommitdiff
path: root/drivers/accel/ivpu/ivpu_pm.c
blob: e6f27daf5560b691a8483ff7963f89aa69dbea65 (plain)
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
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2020-2023 Intel Corporation
 */

#include <linux/highmem.h>
#include <linux/moduleparam.h>
#include <linux/pci.h>
#include <linux/pm_runtime.h>
#include <linux/reboot.h>

#include "vpu_boot_api.h"
#include "ivpu_drv.h"
#include "ivpu_hw.h"
#include "ivpu_fw.h"
#include "ivpu_ipc.h"
#include "ivpu_job.h"
#include "ivpu_mmu.h"
#include "ivpu_pm.h"

static bool ivpu_disable_recovery;
module_param_named_unsafe(disable_recovery, ivpu_disable_recovery, bool, 0644);
MODULE_PARM_DESC(disable_recovery, "Disables recovery when VPU hang is detected");

#define PM_RESCHEDULE_LIMIT     5

static void ivpu_pm_prepare_cold_boot(struct ivpu_device *vdev)
{
	struct ivpu_fw_info *fw = vdev->fw;

	ivpu_cmdq_reset_all_contexts(vdev);
	ivpu_ipc_reset(vdev);
	ivpu_fw_load(vdev);
	fw->entry_point = fw->cold_boot_entry_point;
}

static void ivpu_pm_prepare_warm_boot(struct ivpu_device *vdev)
{
	struct ivpu_fw_info *fw = vdev->fw;
	struct vpu_boot_params *bp = fw->mem->kvaddr;

	if (!bp->save_restore_ret_address) {
		ivpu_pm_prepare_cold_boot(vdev);
		return;
	}

	ivpu_dbg(vdev, FW_BOOT, "Save/restore entry point %llx", bp->save_restore_ret_address);
	fw->entry_point = bp->save_restore_ret_address;
}

static int ivpu_suspend(struct ivpu_device *vdev)
{
	int ret;

	ret = ivpu_shutdown(vdev);
	if (ret) {
		ivpu_err(vdev, "Failed to shutdown VPU: %d\n", ret);
		return ret;
	}

	return ret;
}

static int ivpu_resume(struct ivpu_device *vdev)
{
	int ret;

retry:
	ret = ivpu_hw_power_up(vdev);
	if (ret) {
		ivpu_err(vdev, "Failed to power up HW: %d\n", ret);
		return ret;
	}

	ret = ivpu_mmu_enable(vdev);
	if (ret) {
		ivpu_err(vdev, "Failed to resume MMU: %d\n", ret);
		ivpu_hw_power_down(vdev);
		return ret;
	}

	ret = ivpu_boot(vdev);
	if (ret) {
		ivpu_mmu_disable(vdev);
		ivpu_hw_power_down(vdev);
		if (!ivpu_fw_is_cold_boot(vdev)) {
			ivpu_warn(vdev, "Failed to resume the FW: %d. Retrying cold boot..\n", ret);
			ivpu_pm_prepare_cold_boot(vdev);
			goto retry;
		} else {
			ivpu_err(vdev, "Failed to resume the FW: %d\n", ret);
		}
	}

	return ret;
}

static void ivpu_pm_recovery_work(struct work_struct *work)
{
	struct ivpu_pm_info *pm = container_of(work, struct ivpu_pm_info, recovery_work);
	struct ivpu_device *vdev = pm->vdev;
	char *evt[2] = {"IVPU_PM_EVENT=IVPU_RECOVER", NULL};
	int ret;

retry:
	ret = pci_try_reset_function(to_pci_dev(vdev->drm.dev));
	if (ret == -EAGAIN && !drm_dev_is_unplugged(&vdev->drm)) {
		cond_resched();
		goto retry;
	}

	if (ret && ret != -EAGAIN)
		ivpu_err(vdev, "Failed to reset VPU: %d\n", ret);

	kobject_uevent_env(&vdev->drm.dev->kobj, KOBJ_CHANGE, evt);
}

void ivpu_pm_schedule_recovery(struct ivpu_device *vdev)
{
	struct ivpu_pm_info *pm = vdev->pm;

	if (ivpu_disable_recovery) {
		ivpu_err(vdev, "Recovery not available when disable_recovery param is set\n");
		return;
	}

	if (ivpu_is_fpga(vdev)) {
		ivpu_err(vdev, "Recovery not available on FPGA\n");
		return;
	}

	/* Schedule recovery if it's not in progress */
	if (atomic_cmpxchg(&pm->in_reset, 0, 1) == 0) {
		ivpu_hw_irq_disable(vdev);
		queue_work(system_long_wq, &pm->recovery_work);
	}
}

int ivpu_pm_suspend_cb(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct ivpu_device *vdev = to_ivpu_device(drm);
	unsigned long timeout;

	ivpu_dbg(vdev, PM, "Suspend..\n");

	timeout = jiffies + msecs_to_jiffies(vdev->timeout.tdr);
	while (!ivpu_hw_is_idle(vdev)) {
		cond_resched();
		if (time_after_eq(jiffies, timeout)) {
			ivpu_err(vdev, "Failed to enter idle on system suspend\n");
			return -EBUSY;
		}
	}

	ivpu_suspend(vdev);
	ivpu_pm_prepare_warm_boot(vdev);

	pci_save_state(to_pci_dev(dev));
	pci_set_power_state(to_pci_dev(dev), PCI_D3hot);

	ivpu_dbg(vdev, PM, "Suspend done.\n");

	return 0;
}

int ivpu_pm_resume_cb(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct ivpu_device *vdev = to_ivpu_device(drm);
	int ret;

	ivpu_dbg(vdev, PM, "Resume..\n");

	pci_set_power_state(to_pci_dev(dev), PCI_D0);
	pci_restore_state(to_pci_dev(dev));

	ret = ivpu_resume(vdev);
	if (ret)
		ivpu_err(vdev, "Failed to resume: %d\n", ret);

	ivpu_dbg(vdev, PM, "Resume done.\n");

	return ret;
}

int ivpu_pm_runtime_suspend_cb(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct ivpu_device *vdev = to_ivpu_device(drm);
	int ret;

	ivpu_dbg(vdev, PM, "Runtime suspend..\n");

	if (!ivpu_hw_is_idle(vdev) && vdev->pm->suspend_reschedule_counter) {
		ivpu_dbg(vdev, PM, "Failed to enter idle, rescheduling suspend, retries left %d\n",
			 vdev->pm->suspend_reschedule_counter);
		pm_schedule_suspend(dev, vdev->timeout.reschedule_suspend);
		vdev->pm->suspend_reschedule_counter--;
		return -EAGAIN;
	}

	ret = ivpu_suspend(vdev);
	if (ret)
		ivpu_err(vdev, "Failed to set suspend VPU: %d\n", ret);

	if (!vdev->pm->suspend_reschedule_counter) {
		ivpu_warn(vdev, "VPU failed to enter idle, force suspended.\n");
		ivpu_pm_prepare_cold_boot(vdev);
	} else {
		ivpu_pm_prepare_warm_boot(vdev);
	}

	vdev->pm->suspend_reschedule_counter = PM_RESCHEDULE_LIMIT;

	ivpu_dbg(vdev, PM, "Runtime suspend done.\n");

	return 0;
}

int ivpu_pm_runtime_resume_cb(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct ivpu_device *vdev = to_ivpu_device(drm);
	int ret;

	ivpu_dbg(vdev, PM, "Runtime resume..\n");

	ret = ivpu_resume(vdev);
	if (ret)
		ivpu_err(vdev, "Failed to set RESUME state: %d\n", ret);

	ivpu_dbg(vdev, PM, "Runtime resume done.\n");

	return ret;
}

int ivpu_rpm_get(struct ivpu_device *vdev)
{
	int ret;

	ret = pm_runtime_resume_and_get(vdev->drm.dev);
	if (!drm_WARN_ON(&vdev->drm, ret < 0))
		vdev->pm->suspend_reschedule_counter = PM_RESCHEDULE_LIMIT;

	return ret;
}

void ivpu_rpm_put(struct ivpu_device *vdev)
{
	pm_runtime_mark_last_busy(vdev->drm.dev);
	pm_runtime_put_autosuspend(vdev->drm.dev);
}

void ivpu_pm_reset_prepare_cb(struct pci_dev *pdev)
{
	struct ivpu_device *vdev = pci_get_drvdata(pdev);

	pm_runtime_get_sync(vdev->drm.dev);

	ivpu_dbg(vdev, PM, "Pre-reset..\n");
	atomic_inc(&vdev->pm->reset_counter);
	atomic_set(&vdev->pm->in_reset, 1);
	ivpu_shutdown(vdev);
	ivpu_pm_prepare_cold_boot(vdev);
	ivpu_jobs_abort_all(vdev);
	ivpu_dbg(vdev, PM, "Pre-reset done.\n");
}

void ivpu_pm_reset_done_cb(struct pci_dev *pdev)
{
	struct ivpu_device *vdev = pci_get_drvdata(pdev);
	int ret;

	ivpu_dbg(vdev, PM, "Post-reset..\n");
	ret = ivpu_resume(vdev);
	if (ret)
		ivpu_err(vdev, "Failed to set RESUME state: %d\n", ret);
	atomic_set(&vdev->pm->in_reset, 0);
	ivpu_dbg(vdev, PM, "Post-reset done.\n");

	pm_runtime_put_autosuspend(vdev->drm.dev);
}

int ivpu_pm_init(struct ivpu_device *vdev)
{
	struct device *dev = vdev->drm.dev;
	struct ivpu_pm_info *pm = vdev->pm;

	pm->vdev = vdev;
	pm->suspend_reschedule_counter = PM_RESCHEDULE_LIMIT;

	atomic_set(&pm->in_reset, 0);
	INIT_WORK(&pm->recovery_work, ivpu_pm_recovery_work);

	pm_runtime_use_autosuspend(dev);

	if (ivpu_disable_recovery)
		pm_runtime_set_autosuspend_delay(dev, -1);
	else if (ivpu_is_silicon(vdev))
		pm_runtime_set_autosuspend_delay(dev, 100);
	else
		pm_runtime_set_autosuspend_delay(dev, 60000);

	return 0;
}

void ivpu_pm_cancel_recovery(struct ivpu_device *vdev)
{
	cancel_work_sync(&vdev->pm->recovery_work);
}

void ivpu_pm_enable(struct ivpu_device *vdev)
{
	struct device *dev = vdev->drm.dev;

	pm_runtime_set_active(dev);
	pm_runtime_allow(dev);
	pm_runtime_mark_last_busy(dev);
	pm_runtime_put_autosuspend(dev);
}

void ivpu_pm_disable(struct ivpu_device *vdev)
{
	pm_runtime_get_noresume(vdev->drm.dev);
	pm_runtime_forbid(vdev->drm.dev);
}