> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-boun...@lists.freedesktop.org] On Behalf
> Of Monk Liu
> Sent: Tuesday, February 07, 2017 1:11 AM
> To: amd-gfx@lists.freedesktop.org
> Cc: Liu, Monk
> Subject: [PATCH 11/20] drm/amdgpu:add lock_reset for SRIOV
>
> this lock is used for sriov_gpu_reset, only get this mutex
> can run into sriov_gpu_reset.
>
> we have two cases triggers gpu_reset for SRIOV:
> 1) we have submit timedout and trigger reset voluntarily
> 2) hypervisor found world switch hang and trigger flr and notify we to
> do gpu reset.
>
> both cases need take care and we need a mutex to protect the consistency
> of
> reset routine.
>
> Change-Id: I37aabccfaef1cde32dc350062a519d32c9d51c02
> Signed-off-by: Monk Liu <monk....@amd.com>
Reviewed-by: Alex Deucher <alexander.deuc...@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 1 +
> drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
> index 82a70db..ac035ab 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
> @@ -99,6 +99,7 @@ void amdgpu_virt_init_setting(struct amdgpu_device
> *adev)
> adev->enable_virtual_display = true;
>
> mutex_init(&adev->virt.lock_kiq);
> + mutex_init(&adev->virt.lock_reset);
> }
>
> uint32_t amdgpu_virt_kiq_rreg(struct amdgpu_device *adev, uint32_t reg)
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
> index 7020ff2..4b05568 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
> @@ -47,6 +47,7 @@ struct amdgpu_virt {
> bool chained_ib_support;
> uint32_t reg_val_offs;
> struct mutex lock_kiq;
> + struct mutex lock_reset;
> struct amdgpu_irq_src ack_irq;
> struct amdgpu_irq_src rcv_irq;
> struct delayed_work flr_work;
> --
> 2.7.4
>
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