blob: 7cce1c928a7f4e8386344fd81d58e7893f72c050 [file] [log] [blame]
// 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_fw_log.h"
#include "ivpu_ipc.h"
#include "ivpu_job.h"
#include "ivpu_jsm_msg.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 NPU hang is detected");
static unsigned long ivpu_tdr_timeout_ms;
module_param_named(tdr_timeout_ms, ivpu_tdr_timeout_ms, ulong, 0644);
MODULE_PARM_DESC(tdr_timeout_ms, "Timeout for device hang detection, in milliseconds, 0 - default");
#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 = ivpu_bo_vaddr(fw->mem);
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;
/* Save PCI state before powering down as it sometimes gets corrupted if NPU hangs */
pci_save_state(to_pci_dev(vdev->drm.dev));
ret = ivpu_shutdown(vdev);
if (ret)
ivpu_err(vdev, "Failed to shutdown VPU: %d\n", ret);
pci_set_power_state(to_pci_dev(vdev->drm.dev), PCI_D3hot);
return ret;
}
static int ivpu_resume(struct ivpu_device *vdev)
{
int ret;
pci_set_power_state(to_pci_dev(vdev->drm.dev), PCI_D0);
pci_restore_state(to_pci_dev(vdev->drm.dev));
retry:
ret = ivpu_hw_power_up(vdev);
if (ret) {
ivpu_err(vdev, "Failed to power up HW: %d\n", ret);
goto err_power_down;
}
ret = ivpu_mmu_enable(vdev);
if (ret) {
ivpu_err(vdev, "Failed to resume MMU: %d\n", ret);
goto err_power_down;
}
ret = ivpu_boot(vdev);
if (ret)
goto err_mmu_disable;
return 0;
err_mmu_disable:
ivpu_mmu_disable(vdev);
err_power_down:
ivpu_hw_power_down(vdev);
if (!ivpu_fw_is_cold_boot(vdev)) {
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;
ivpu_err(vdev, "Recovering the NPU (reset #%d)\n", atomic_read(&vdev->pm->reset_counter));
ret = pm_runtime_resume_and_get(vdev->drm.dev);
if (ret)
ivpu_err(vdev, "Failed to resume NPU: %d\n", ret);
ivpu_fw_log_dump(vdev);
atomic_inc(&vdev->pm->reset_counter);
atomic_set(&vdev->pm->reset_pending, 1);
down_write(&vdev->pm->reset_lock);
ivpu_suspend(vdev);
ivpu_pm_prepare_cold_boot(vdev);
ivpu_jobs_abort_all(vdev);
ret = ivpu_resume(vdev);
if (ret)
ivpu_err(vdev, "Failed to resume NPU: %d\n", ret);
up_write(&vdev->pm->reset_lock);
atomic_set(&vdev->pm->reset_pending, 0);
kobject_uevent_env(&vdev->drm.dev->kobj, KOBJ_CHANGE, evt);
pm_runtime_mark_last_busy(vdev->drm.dev);
pm_runtime_put_autosuspend(vdev->drm.dev);
}
void ivpu_pm_trigger_recovery(struct ivpu_device *vdev, const char *reason)
{
ivpu_err(vdev, "Recovery triggered by %s\n", reason);
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;
}
/* Trigger recovery if it's not in progress */
if (atomic_cmpxchg(&vdev->pm->reset_pending, 0, 1) == 0) {
ivpu_hw_diagnose_failure(vdev);
ivpu_hw_irq_disable(vdev); /* Disable IRQ early to protect from IRQ storm */
queue_work(system_long_wq, &vdev->pm->recovery_work);
}
}
static void ivpu_job_timeout_work(struct work_struct *work)
{
struct ivpu_pm_info *pm = container_of(work, struct ivpu_pm_info, job_timeout_work.work);
struct ivpu_device *vdev = pm->vdev;
ivpu_pm_trigger_recovery(vdev, "TDR");
}
void ivpu_start_job_timeout_detection(struct ivpu_device *vdev)
{
unsigned long timeout_ms = ivpu_tdr_timeout_ms ? ivpu_tdr_timeout_ms : vdev->timeout.tdr;
/* No-op if already queued */
queue_delayed_work(system_wq, &vdev->pm->job_timeout_work, msecs_to_jiffies(timeout_ms));
}
void ivpu_stop_job_timeout_detection(struct ivpu_device *vdev)
{
cancel_delayed_work_sync(&vdev->pm->job_timeout_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_jsm_pwr_d0i3_enter(vdev);
ivpu_suspend(vdev);
ivpu_pm_prepare_warm_boot(vdev);
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");
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);
bool hw_is_idle = true;
int ret;
drm_WARN_ON(&vdev->drm, !xa_empty(&vdev->submitted_jobs_xa));
drm_WARN_ON(&vdev->drm, work_pending(&vdev->pm->recovery_work));
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;
}
if (!vdev->pm->suspend_reschedule_counter)
hw_is_idle = false;
else if (ivpu_jsm_pwr_d0i3_enter(vdev))
hw_is_idle = false;
ret = ivpu_suspend(vdev);
if (ret)
ivpu_err(vdev, "Failed to suspend NPU: %d\n", ret);
if (!hw_is_idle) {
ivpu_err(vdev, "NPU failed to enter idle, force suspended.\n");
ivpu_fw_log_dump(vdev);
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;
}
int ivpu_rpm_get_if_active(struct ivpu_device *vdev)
{
int ret;
ret = pm_runtime_get_if_in_use(vdev->drm.dev);
drm_WARN_ON(&vdev->drm, ret < 0);
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);
ivpu_dbg(vdev, PM, "Pre-reset..\n");
atomic_inc(&vdev->pm->reset_counter);
atomic_set(&vdev->pm->reset_pending, 1);
pm_runtime_get_sync(vdev->drm.dev);
down_write(&vdev->pm->reset_lock);
ivpu_prepare_for_reset(vdev);
ivpu_hw_reset(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);
up_write(&vdev->pm->reset_lock);
atomic_set(&vdev->pm->reset_pending, 0);
ivpu_dbg(vdev, PM, "Post-reset done.\n");
pm_runtime_mark_last_busy(vdev->drm.dev);
pm_runtime_put_autosuspend(vdev->drm.dev);
}
void ivpu_pm_init(struct ivpu_device *vdev)
{
struct device *dev = vdev->drm.dev;
struct ivpu_pm_info *pm = vdev->pm;
int delay;
pm->vdev = vdev;
pm->suspend_reschedule_counter = PM_RESCHEDULE_LIMIT;
init_rwsem(&pm->reset_lock);
atomic_set(&pm->reset_pending, 0);
atomic_set(&pm->reset_counter, 0);
INIT_WORK(&pm->recovery_work, ivpu_pm_recovery_work);
INIT_DELAYED_WORK(&pm->job_timeout_work, ivpu_job_timeout_work);
if (ivpu_disable_recovery)
delay = -1;
else
delay = vdev->timeout.autosuspend;
pm_runtime_use_autosuspend(dev);
pm_runtime_set_autosuspend_delay(dev, delay);
ivpu_dbg(vdev, PM, "Autosuspend delay = %d\n", delay);
}
void ivpu_pm_cancel_recovery(struct ivpu_device *vdev)
{
drm_WARN_ON(&vdev->drm, delayed_work_pending(&vdev->pm->job_timeout_work));
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);
}