#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;
}
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_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);
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);
}