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 23 static bool ivpu_disable_recovery; 24 module_param_named_unsafe(disable_recovery, ivpu_disable_recovery, bool, 0644); 25 MODULE_PARM_DESC(disable_recovery, "Disables recovery when NPU hang is detected"); 26 27 static unsigned long ivpu_tdr_timeout_ms; 28 module_param_named(tdr_timeout_ms, ivpu_tdr_timeout_ms, ulong, 0644); 29 MODULE_PARM_DESC(tdr_timeout_ms, "Timeout for device hang detection, in milliseconds, 0 - default"); 30 31 #define PM_RESCHEDULE_LIMIT 5 32 33 static 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 43 static 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 57 static 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 73 static 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 80 retry: 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 99 err_mmu_disable: 100 ivpu_mmu_disable(vdev); 101 err_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 } 113 114 static 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 NPU (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 NPU: %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 } 148 149 void 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 } 170 171 static 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 } 178 179 void 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 } 186 187 void ivpu_stop_job_timeout_detection(struct ivpu_device *vdev) 188 { 189 cancel_delayed_work_sync(&vdev->pm->job_timeout_work); 190 } 191 192 int 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 } 218 219 int 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 } 235 236 int 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 suspend NPU: %d\n", ret); 264 265 if (!hw_is_idle) { 266 ivpu_err(vdev, "NPU 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 } 279 280 int 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 } 296 297 int 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 } 307 308 int ivpu_rpm_get_if_active(struct ivpu_device *vdev) 309 { 310 int ret; 311 312 ret = pm_runtime_get_if_in_use(vdev->drm.dev); 313 drm_WARN_ON(&vdev->drm, ret < 0); 314 315 return ret; 316 } 317 318 void 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 } 323 324 void 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 } 340 341 void 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 } 357 358 void 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 } 384 385 void 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 } 390 391 void 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 } 400 401 void ivpu_pm_disable(struct ivpu_device *vdev) 402 { 403 pm_runtime_get_noresume(vdev->drm.dev); 404 pm_runtime_forbid(vdev->drm.dev); 405 } 406