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accel/ivpu: Don't enter d0i3 during FLR

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Avoid HW bug on some platforms where we enter D0i3 state
and CPU is in low power states (C8 or above).

Fixes: 852be13f3b ("accel/ivpu: Add PM support")
Cc: stable@vger.kernel.org
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Signed-off-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231003064213.1527327-1-stanislaw.gruszka@linux.intel.com
This commit is contained in:
Jacek Lawrynowicz 2023-10-03 08:42:13 +02:00 • committed by Stanislaw Gruszka
parent fa8391ad68
commit 828d63042a
6 changed files with 21 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
drivers/accel/ivpu/ivpu_drv.c
View file

@ -367,14 +367,19 @@ int ivpu_boot(struct ivpu_device *vdev)
return 0;
}
int ivpu_shutdown(struct ivpu_device *vdev)
void ivpu_prepare_for_reset(struct ivpu_device *vdev)
{
int ret;
ivpu_hw_irq_disable(vdev);
disable_irq(vdev->irq);
ivpu_ipc_disable(vdev);
ivpu_mmu_disable(vdev);
}
int ivpu_shutdown(struct ivpu_device *vdev)
{
int ret;
ivpu_prepare_for_reset(vdev);
ret = ivpu_hw_power_down(vdev);
if (ret)

1
drivers/accel/ivpu/ivpu_drv.h
View file

@ -151,6 +151,7 @@ void ivpu_file_priv_put(struct ivpu_file_priv **link);
int ivpu_boot(struct ivpu_device *vdev);
int ivpu_shutdown(struct ivpu_device *vdev);
void ivpu_prepare_for_reset(struct ivpu_device *vdev);
static inline u8 ivpu_revision(struct ivpu_device *vdev)
{

8
drivers/accel/ivpu/ivpu_hw.h
View file

@ -13,6 +13,7 @@ struct ivpu_hw_ops {
int (*power_up)(struct ivpu_device *vdev);
int (*boot_fw)(struct ivpu_device *vdev);
int (*power_down)(struct ivpu_device *vdev);
int (*reset)(struct ivpu_device *vdev);
bool (*is_idle)(struct ivpu_device *vdev);
void (*wdt_disable)(struct ivpu_device *vdev);
void (*diagnose_failure)(struct ivpu_device *vdev);
@ -91,6 +92,13 @@ static inline int ivpu_hw_power_down(struct ivpu_device *vdev)
return vdev->hw->ops->power_down(vdev);
};
static inline int ivpu_hw_reset(struct ivpu_device *vdev)
{
ivpu_dbg(vdev, PM, "HW reset\n");
return vdev->hw->ops->reset(vdev);
};
static inline void ivpu_hw_wdt_disable(struct ivpu_device *vdev)
{
vdev->hw->ops->wdt_disable(vdev);

1
drivers/accel/ivpu/ivpu_hw_37xx.c
View file

@ -1029,6 +1029,7 @@ const struct ivpu_hw_ops ivpu_hw_37xx_ops = {
.power_up = ivpu_hw_37xx_power_up,
.is_idle = ivpu_hw_37xx_is_idle,
.power_down = ivpu_hw_37xx_power_down,
.reset = ivpu_hw_37xx_reset,
.boot_fw = ivpu_hw_37xx_boot_fw,
.wdt_disable = ivpu_hw_37xx_wdt_disable,
.diagnose_failure = ivpu_hw_37xx_diagnose_failure,

1
drivers/accel/ivpu/ivpu_hw_40xx.c
View file

@ -1179,6 +1179,7 @@ const struct ivpu_hw_ops ivpu_hw_40xx_ops = {
.power_up = ivpu_hw_40xx_power_up,
.is_idle = ivpu_hw_40xx_is_idle,
.power_down = ivpu_hw_40xx_power_down,
.reset = ivpu_hw_40xx_reset,
.boot_fw = ivpu_hw_40xx_boot_fw,
.wdt_disable = ivpu_hw_40xx_wdt_disable,
.diagnose_failure = ivpu_hw_40xx_diagnose_failure,

3
drivers/accel/ivpu/ivpu_pm.c
View file

@ -261,7 +261,8 @@ void ivpu_pm_reset_prepare_cb(struct pci_dev *pdev)
ivpu_dbg(vdev, PM, "Pre-reset..\n");
atomic_inc(&vdev->pm->reset_counter);
atomic_set(&vdev->pm->in_reset, 1);
ivpu_shutdown(vdev);
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");