On 4/13/2018 10:20 PM, Alex Deucher wrote:
> On Fri, Apr 13, 2018 at 9:25 AM, Christian König
> <christian.koenig at amd.com> wrote:
>> Am 13.04.2018 um 10:31 schrieb Shirish S:
>>> amdgpu_ib_ring_tests() runs test IB's on rings at boot
>>> contributes to ~500 ms of amdgpu driver's boot time.
>>>
>>> This patch defers it and ensures that its executed
>>> in amdgpu_info_ioctl() if it wasn't scheduled.
>>>
>>> V2: Use queue_delayed_work() & flush_delayed_work().
>>>
>>> Signed-off-by: Shirish S <shirish.s at amd.com>
>>> ---
>>> drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 ++
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 20 +++++++++++++++++---
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 4 ++++
>>> 3 files changed, 23 insertions(+), 3 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> index 5734871..ae8f722 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> @@ -1611,6 +1611,8 @@ struct amdgpu_device {
>>> /* delayed work_func for deferring clockgating during resume */
>>> struct delayed_work late_init_work;
>>> + /* delayed work_func to defer testing IB's on rings during boot */
>>> + struct delayed_work late_init_test_ib_work;
>>
>> That still has the chance of running the late init in parallel with the IB
>> tests and that really doesn't looks like a good idea to me.
> Yeah, at least on older chips we run into problems if we power or
> clock gate some engines while they are in use. Even on engines that
> support dynamic gating, you usually have to set it up while the engine
> is idle. Make sure the IB tests run before we enable gating.
Ok Alex.
I have re-spun V3, with only one delayed work and ensuring ib tests are
run before enabling clock gating.
Regards,
Shirish S
> Alex
>
>> Is there any issue with putting the IB test into the late init work handler
>> as well?
>>
>>
>>> struct amdgpu_virt virt;
>>> /* firmware VRAM reservation */
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> index 1762eb4..ee84058 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> @@ -63,6 +63,7 @@ MODULE_FIRMWARE("amdgpu/vega12_gpu_info.bin");
>>> MODULE_FIRMWARE("amdgpu/raven_gpu_info.bin");
>>> #define AMDGPU_RESUME_MS 2000
>>> +#define AMDGPU_IB_TEST_SCHED_MS 2000
>>> static const char *amdgpu_asic_name[] = {
>>> "TAHITI",
>>> @@ -2105,6 +2106,16 @@ bool amdgpu_device_asic_has_dc_support(enum
>>> amd_asic_type asic_type)
>>> }
>>> }
>>> +static void amdgpu_device_late_init_test_ib_func_handler(struct
>>> work_struct *work)
>>> +{
>>> + struct amdgpu_device *adev =
>>> + container_of(work, struct amdgpu_device,
>>> late_init_test_ib_work.work);
>>> + int r = amdgpu_ib_ring_tests(adev);
>>> +
>>> + if (r)
>>> + DRM_ERROR("ib ring test failed (%d).\n", r);
>>> +}
>>> +
>>> /**
>>> * amdgpu_device_has_dc_support - check if dc is supported
>>> *
>>> @@ -2212,6 +2223,8 @@ int amdgpu_device_init(struct amdgpu_device *adev,
>>> INIT_LIST_HEAD(&adev->ring_lru_list);
>>> spin_lock_init(&adev->ring_lru_list_lock);
>>> + INIT_DELAYED_WORK(&adev->late_init_test_ib_work,
>>> + amdgpu_device_late_init_test_ib_func_handler);
>>> INIT_DELAYED_WORK(&adev->late_init_work,
>>> amdgpu_device_ip_late_init_func_handler);
>>> @@ -2374,9 +2387,9 @@ int amdgpu_device_init(struct amdgpu_device *adev,
>>> goto failed;
>>> }
>>> - r = amdgpu_ib_ring_tests(adev);
>>> - if (r)
>>> - DRM_ERROR("ib ring test failed (%d).\n", r);
>>> + /* Schedule amdgpu_ib_ring_tests() */
>>> + queue_delayed_work(system_wq, &adev->late_init_test_ib_work,
>>> + msecs_to_jiffies(AMDGPU_IB_TEST_SCHED_MS));
>>> if (amdgpu_sriov_vf(adev))
>>> amdgpu_virt_init_data_exchange(adev);
>>> @@ -2469,6 +2482,7 @@ void amdgpu_device_fini(struct amdgpu_device *adev)
>>> }
>>> adev->accel_working = false;
>>> cancel_delayed_work_sync(&adev->late_init_work);
>>> + cancel_delayed_work_sync(&adev->late_init_test_ib_work);
>>> /* free i2c buses */
>>> if (!amdgpu_device_has_dc_support(adev))
>>> amdgpu_i2c_fini(adev);
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>> index 487d39e..6fa326b 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>> @@ -279,6 +279,10 @@ static int amdgpu_info_ioctl(struct drm_device *dev,
>>> void *data, struct drm_file
>>> if (!info->return_size || !info->return_pointer)
>>> return -EINVAL;
>>> + /* Ensure IB tests on ring are executed */
>>> + if (delayed_work_pending(&adev->late_init_test_ib_work))
>>> + flush_delayed_work(&adev->late_init_test_ib_work);
>>> +
>>
>> You just need to call flush_delayed_work() here without the if.
>>
>> Regards,
>> Christian.
>>
>>> switch (info->query) {
>>> case AMDGPU_INFO_ACCEL_WORKING:
>>> ui32 = adev->accel_working;
>>
>> _______________________________________________
>> amd-gfx mailing list
>> amd-gfx at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
