1 // SPDX-License-Identifier: GPL-2.0-only OR MIT
27  * pvr_device_lost() - Mark GPU device as lost
28  * @pvr_dev: Target PowerVR device.
35 	if (!pvr_dev->lost) {  in pvr_device_lost()
36 		pvr_dev->lost = true;  in pvr_device_lost()
44 	struct pvr_fw_device *fw_dev = &pvr_dev->fw_dev;  in pvr_power_send_command()
49 	WRITE_ONCE(*fw_dev->power_sync, 0);  in pvr_power_send_command()
56 	return readl_poll_timeout(pvr_dev->fw_dev.power_sync, value, value != 0, 100,  in pvr_power_send_command()
92 		cancel_delayed_work_sync(&pvr_dev->watchdog.work);  in pvr_power_fw_disable()
122 	queue_delayed_work(pvr_dev->sched_wq, &pvr_dev->watchdog.work,  in pvr_power_fw_enable()
135 	enum rogue_fwif_pow_state pow_state = READ_ONCE(pvr_dev->fw_dev.fwif_sysdata->pow_state);  in pvr_power_is_idle()
145 	u32 kccb_cmds_executed = pvr_dev->fw_dev.fwif_osdata->kccb_cmds_executed;  in pvr_watchdog_kccb_stalled()
148 	if (pvr_dev->watchdog.old_kccb_cmds_executed == kccb_cmds_executed && !kccb_is_idle) {  in pvr_watchdog_kccb_stalled()
149 		pvr_dev->watchdog.kccb_stall_count++;  in pvr_watchdog_kccb_stalled()
155 		if (pvr_dev->watchdog.kccb_stall_count == 2) {  in pvr_watchdog_kccb_stalled()
156 			pvr_dev->watchdog.kccb_stall_count = 0;  in pvr_watchdog_kccb_stalled()
159 	} else if (pvr_dev->watchdog.old_kccb_cmds_executed == kccb_cmds_executed) {  in pvr_watchdog_kccb_stalled()
162 		mutex_lock(&pvr_dev->queues.lock);  in pvr_watchdog_kccb_stalled()
163 		has_active_contexts = list_empty(&pvr_dev->queues.active);  in pvr_watchdog_kccb_stalled()
164 		mutex_unlock(&pvr_dev->queues.lock);  in pvr_watchdog_kccb_stalled()
175 		pvr_dev->watchdog.old_kccb_cmds_executed = kccb_cmds_executed;  in pvr_watchdog_kccb_stalled()
176 		pvr_dev->watchdog.kccb_stall_count = 0;  in pvr_watchdog_kccb_stalled()
189 	if (pvr_dev->lost)  in pvr_watchdog_worker()
192 	if (pm_runtime_get_if_in_use(from_pvr_device(pvr_dev)->dev) <= 0)  in pvr_watchdog_worker()
195 	if (!pvr_dev->fw_dev.booted)  in pvr_watchdog_worker()
208 	pm_runtime_put(from_pvr_device(pvr_dev)->dev);  in pvr_watchdog_worker()
211 	if (!pvr_dev->lost) {  in pvr_watchdog_worker()
212 		queue_delayed_work(pvr_dev->sched_wq, &pvr_dev->watchdog.work,  in pvr_watchdog_worker()
218  * pvr_watchdog_init() - Initialise watchdog for device
219  * @pvr_dev: Target PowerVR device.
223  *  * -%ENOMEM on out of memory.
228 	INIT_DELAYED_WORK(&pvr_dev->watchdog.work, pvr_watchdog_worker);  in pvr_watchdog_init()
243 		return -EIO;  in pvr_power_device_suspend()
245 	if (pvr_dev->fw_dev.booted) {  in pvr_power_device_suspend()
251 	clk_disable_unprepare(pvr_dev->mem_clk);  in pvr_power_device_suspend()
252 	clk_disable_unprepare(pvr_dev->sys_clk);  in pvr_power_device_suspend()
253 	clk_disable_unprepare(pvr_dev->core_clk);  in pvr_power_device_suspend()
271 		return -EIO;  in pvr_power_device_resume()
273 	err = clk_prepare_enable(pvr_dev->core_clk);  in pvr_power_device_resume()
277 	err = clk_prepare_enable(pvr_dev->sys_clk);  in pvr_power_device_resume()
281 	err = clk_prepare_enable(pvr_dev->mem_clk);  in pvr_power_device_resume()
285 	if (pvr_dev->fw_dev.booted) {  in pvr_power_device_resume()
296 	clk_disable_unprepare(pvr_dev->mem_clk);  in pvr_power_device_resume()
299 	clk_disable_unprepare(pvr_dev->sys_clk);  in pvr_power_device_resume()
302 	clk_disable_unprepare(pvr_dev->core_clk);  in pvr_power_device_resume()
317 	return pvr_power_is_idle(pvr_dev) ? 0 : -EBUSY;  in pvr_power_device_idle()
321  * pvr_power_reset() - Reset the GPU
328  * If a hard reset fails then the GPU device is reported as lost.
346 	down_write(&pvr_dev->reset_sem);  in pvr_power_reset()
348 	if (pvr_dev->lost) {  in pvr_power_reset()
349 		err = -EIO;  in pvr_power_reset()
354 	disable_irq(pvr_dev->irq);  in pvr_power_reset()
365 				pvr_dev->fw_dev.booted = false;  in pvr_power_reset()
366 				WARN_ON(pm_runtime_force_suspend(from_pvr_device(pvr_dev)->dev));  in pvr_power_reset()
372 				err = pm_runtime_force_resume(from_pvr_device(pvr_dev)->dev);  in pvr_power_reset()
373 				pvr_dev->fw_dev.booted = true;  in pvr_power_reset()
378 				pvr_dev->fw_dev.fwif_sysdata->hwr_state_flags &=  in pvr_power_reset()
400 	enable_irq(pvr_dev->irq);  in pvr_power_reset()
402 	up_write(&pvr_dev->reset_sem);  in pvr_power_reset()
409 	drm_err(from_pvr_device(pvr_dev), "GPU device lost");  in pvr_power_reset()
418 	up_write(&pvr_dev->reset_sem);  in pvr_power_reset()
426  * pvr_watchdog_fini() - Shutdown watchdog for device
427  * @pvr_dev: Target PowerVR device.
432 	cancel_delayed_work_sync(&pvr_dev->watchdog.work);  in pvr_watchdog_fini()