[PATCH 3/3] drm/amdgpu: fix gpu reset issue
Christian König
deathsimple at vodafone.de
Thu May 4 11:29:52 UTC 2017
> I suggest you firstly unify this gpu_reset_state for both SRIOV and bare-metal case
Yeah, that sounds like a good idea to me as well.
I suggest to have a function which covers things necessary for both
cases, e.g. stopping the scheduler and blocking TTM.
And inside that one we call specific functions for bare metal and SRIOV
for the special handling.
Regards,
Christian.
Am 04.05.2017 um 12:42 schrieb Liu, Monk:
> First of all, Your patch will impact on SR-IOV case, because "gpu_reset_state" will be referenced by two place:
> 1) IOCTL; 2)GPU-RESET ,
> SRIOV use srio_gpu_reset, but SRIOV use the same IOCTL routines, that way the gpu_reset_state is not consistent for SR-IOV case
>
> I suggest you firstly unify this gpu_reset_state for both SRIOV and bare-metal case
>
> For sriov, we have "adev->gfx.in_reset " and you now have "adev->gpu_reset_state",
> I suggest you replace all "adev->gfx.in_reset" with "adev->gpu_reset_state",
>
> BR Monk
>
>
> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf Of zhoucm1
> Sent: Friday, April 21, 2017 3:18 PM
> To: He, Hongbo <Hongbo.He at amd.com>; amd-gfx at lists.freedesktop.org
> Subject: Re: [PATCH 3/3] drm/amdgpu: fix gpu reset issue
>
>
>
> On 2017年04月21日 15:08, Roger.He wrote:
>
>> Change-Id: Ib77d33a09f348ebf2e3a9d7861411f4b951ebf7c
>> Signed-off-by: Roger.He <Hongbo.He at amd.com>
> Please add more explaination in comment, like "prevent ioctl during gpu reset, otherwise many un-expected behaviour happen."
>
> Regards,
> David Zhou
>> ---
>> drivers/gpu/drm/amd/amdgpu/amdgpu.h | 6 ++++++
>> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 16 +++++++++++++++-
>> drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 ++++
>> drivers/gpu/drm/amd/amdgpu/amdgpu_ioc32.c | 7 ++++++-
>> 4 files changed, 31 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> index 71364f5..ab0ffa8 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> @@ -1526,6 +1526,7 @@ struct amdgpu_device {
>> atomic64_t num_bytes_moved;
>> atomic64_t num_evictions;
>> atomic_t gpu_reset_counter;
>> + atomic_t gpu_reset_state;
>>
>> /* data for buffer migration throttling */
>> struct {
>> @@ -1851,6 +1852,11 @@ amdgpu_get_sdma_instance(struct amdgpu_ring *ring)
>> #define amdgpu_psp_check_fw_loading_status(adev, i)
>> (adev)->firmware.funcs->check_fw_loading_status((adev), (i))
>>
>> /* Common functions */
>> +static inline int amdgpu_device_is_reset(struct amdgpu_device *adev)
>> +{
>> + return atomic_read(&adev->gpu_reset_state);
>> +}
>> +
>> int amdgpu_gpu_reset(struct amdgpu_device *adev);
>> bool amdgpu_need_backup(struct amdgpu_device *adev);
>> void amdgpu_pci_config_reset(struct amdgpu_device *adev); diff --git
>> a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>> index f882496..0fb4716 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>> @@ -1894,6 +1894,7 @@ int amdgpu_device_init(struct amdgpu_device *adev,
>> mutex_init(&adev->grbm_idx_mutex);
>> mutex_init(&adev->mn_lock);
>> hash_init(adev->mn_hash);
>> + atomic_set(&adev->gpu_reset_state, 0);
>>
>> amdgpu_check_arguments(adev);
>>
>> @@ -2655,6 +2656,18 @@ int amdgpu_sriov_gpu_reset(struct amdgpu_device *adev, bool voluntary)
>> }
>>
>> /**
>> + * amdgpu_device_set_reset_state - set gpu reset state
>> + *
>> + * @adev: amdgpu device pointer
>> + * @state: true when start to reset gpu; false: reset done */ static
>> +inline void amdgpu_device_set_reset_state(struct amdgpu_device *adev,
>> + bool state)
>> +{
>> + atomic_set(&adev->gpu_reset_state, state); }
>> +
>> +/**
>> * amdgpu_gpu_reset - reset the asic
>> *
>> * @adev: amdgpu device pointer
>> @@ -2678,7 +2691,7 @@ int amdgpu_gpu_reset(struct amdgpu_device *adev)
>> }
>>
>> atomic_inc(&adev->gpu_reset_counter);
>> -
>> + amdgpu_device_set_reset_state(adev, true);
>> /* block TTM */
>> resched = ttm_bo_lock_delayed_workqueue(&adev->mman.bdev);
>> /* store modesetting */
>> @@ -2811,6 +2824,7 @@ int amdgpu_gpu_reset(struct amdgpu_device *adev)
>> dev_info(adev->dev, "GPU reset failed\n");
>> }
>>
>> + amdgpu_device_set_reset_state(adev, false);
>> return r;
>> }
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>> index ead00d7..8cc14af 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>> @@ -679,11 +679,15 @@ long amdgpu_drm_ioctl(struct file *filp,
>> struct drm_file *file_priv = filp->private_data;
>> struct drm_device *dev;
>> long ret;
>> +
>> dev = file_priv->minor->dev;
>> ret = pm_runtime_get_sync(dev->dev);
>> if (ret < 0)
>> return ret;
>>
>> + while (amdgpu_device_is_reset(dev->dev_private))
>> + msleep(100);
>> +
>> ret = drm_ioctl(filp, cmd, arg);
>>
>> pm_runtime_mark_last_busy(dev->dev);
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ioc32.c
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ioc32.c
>> index 2648291..22b8059 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ioc32.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ioc32.c
>> @@ -36,10 +36,15 @@
>> long amdgpu_kms_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
>> {
>> unsigned int nr = DRM_IOCTL_NR(cmd);
>> + struct drm_file *file_priv = filp->private_data;
>> + struct amdgpu_device *adev = file_priv->minor->dev->dev_private;
>> int ret;
>>
>> - if (nr < DRM_COMMAND_BASE)
>> + if (nr < DRM_COMMAND_BASE) {
>> + while (amdgpu_device_is_reset(adev))
>> + msleep(100);
>> return drm_compat_ioctl(filp, cmd, arg);
>> + }
>>
>> ret = amdgpu_drm_ioctl(filp, cmd, arg);
>>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
> _______________________________________________
> amd-gfx mailing list
> amd-gfx at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
More information about the amd-gfx
mailing list