diff options
Diffstat (limited to 'drivers/accel/ivpu/ivpu_pm.c')
| -rw-r--r-- | drivers/accel/ivpu/ivpu_pm.c | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/drivers/accel/ivpu/ivpu_pm.c b/drivers/accel/ivpu/ivpu_pm.c new file mode 100644 index 000000000000..553bcbd787b3 --- /dev/null +++ b/drivers/accel/ivpu/ivpu_pm.c @@ -0,0 +1,329 @@ +// 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; + + ret = pci_reset_function(to_pci_dev(vdev->drm.dev)); + if (ret) + 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); + int ret; + + ivpu_dbg(vdev, PM, "Suspend..\n"); + + ret = ivpu_suspend(vdev); + if (ret && 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 -EBUSY; + } else if (!vdev->pm->suspend_reschedule_counter) { + ivpu_warn(vdev, "Failed to enter idle, force suspend\n"); + ivpu_pm_prepare_cold_boot(vdev); + } else { + ivpu_pm_prepare_warm_boot(vdev); + } + + vdev->pm->suspend_reschedule_counter = PM_RESCHEDULE_LIMIT; + + 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 ret; +} + +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; + + ivpu_dbg(vdev, RPM, "rpm_get count %d\n", atomic_read(&vdev->drm.dev->power.usage_count)); + + 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) +{ + ivpu_dbg(vdev, RPM, "rpm_put count %d\n", atomic_read(&vdev->drm.dev->power.usage_count)); + + 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_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_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); + + ivpu_dbg(vdev, RPM, "Enable RPM count %d\n", atomic_read(&dev->power.usage_count)); +} + +void ivpu_pm_disable(struct ivpu_device *vdev) +{ + struct device *dev = vdev->drm.dev; + + ivpu_dbg(vdev, RPM, "Disable RPM count %d\n", atomic_read(&dev->power.usage_count)); + + pm_runtime_get_noresume(vdev->drm.dev); + pm_runtime_forbid(vdev->drm.dev); +} |