linux-kernel - RE: [PATCH] drm/amdgpu: add vm fault information to devcoredump

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Date: Wed, 6 Mar 2024 19:21:32 +0000
From: "Deucher, Alexander" <Alexander.Deucher@....com>
To: "Khatri, Sunil" <Sunil.Khatri@....com>, "Koenig, Christian"
	<Christian.Koenig@....com>, "Sharma, Shashank" <Shashank.Sharma@....com>
CC: "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "Joshi, Mukul"
	<Mukul.Joshi@....com>, "Paneer Selvam, Arunpravin"
	<Arunpravin.PaneerSelvam@....com>, "Khatri, Sunil" <Sunil.Khatri@....com>
Subject: RE: [PATCH] drm/amdgpu: add vm fault information to devcoredump

[Public]

> -----Original Message-----
> From: Sunil Khatri <sunil.khatri@....com>
> Sent: Wednesday, March 6, 2024 1:20 PM
> To: Deucher, Alexander <Alexander.Deucher@....com>; Koenig, Christian
> <Christian.Koenig@....com>; Sharma, Shashank
> <Shashank.Sharma@....com>
> Cc: amd-gfx@...ts.freedesktop.org; dri-devel@...ts.freedesktop.org; linux-
> kernel@...r.kernel.org; Joshi, Mukul <Mukul.Joshi@....com>; Paneer
> Selvam, Arunpravin <Arunpravin.PaneerSelvam@....com>; Khatri, Sunil
> <Sunil.Khatri@....com>
> Subject: [PATCH] drm/amdgpu: add vm fault information to devcoredump
>
> Add page fault information to the devcoredump.
>
> Output of devcoredump:
> **** AMDGPU Device Coredump ****
> version: 1
> kernel: 6.7.0-amd-staging-drm-next
> module: amdgpu
> time: 29.725011811
> process_name: soft_recovery_p PID: 1720
>
> Ring timed out details
> IP Type: 0 Ring Name: gfx_0.0.0
>
> [gfxhub] Page fault observed for GPU family:143 Faulty page starting at

I think we should add a separate section for the GPU identification information (family, PCI ids, IP versions, etc.).  For this patch, I think fine to just print the fault address and status.

Alex

> address 0x0000000000000000 Protection fault status register:0x301031
>
> VRAM is lost due to GPU reset!
>
> Signed-off-by: Sunil Khatri <sunil.khatri@....com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c | 15 ++++++++++++++-
> drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h |  1 +
>  2 files changed, 15 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
> index 147100c27c2d..d7fea6cdf2f9 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
> @@ -203,8 +203,20 @@ amdgpu_devcoredump_read(char *buffer, loff_t
> offset, size_t count,
>                          coredump->ring->name);
>       }
>
> +     if (coredump->fault_info.status) {
> +             struct amdgpu_vm_fault_info *fault_info = &coredump-
> >fault_info;
> +
> +             drm_printf(&p, "\n[%s] Page fault observed for GPU
> family:%d\n",
> +                        fault_info->vmhub ? "mmhub" : "gfxhub",
> +                        coredump->adev->family);
> +             drm_printf(&p, "Faulty page starting at address 0x%016llx\n",
> +                        fault_info->addr);
> +             drm_printf(&p, "Protection fault status register:0x%x\n",
> +                        fault_info->status);
> +     }
> +
>       if (coredump->reset_vram_lost)
> -             drm_printf(&p, "VRAM is lost due to GPU reset!\n");
> +             drm_printf(&p, "\nVRAM is lost due to GPU reset!\n");
>       if (coredump->adev->reset_info.num_regs) {
>               drm_printf(&p, "AMDGPU register dumps:\nOffset:
> Value:\n");
>
> @@ -253,6 +265,7 @@ void amdgpu_coredump(struct amdgpu_device
> *adev, bool vram_lost,
>       if (job) {
>               s_job = &job->base;
>               coredump->ring = to_amdgpu_ring(s_job->sched);
> +             coredump->fault_info = job->vm->fault_info;
>       }
>
>       coredump->adev = adev;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h
> index 60522963aaca..3197955264f9 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h
> @@ -98,6 +98,7 @@ struct amdgpu_coredump_info {
>       struct timespec64               reset_time;
>       bool                            reset_vram_lost;
>       struct amdgpu_ring                      *ring;
> +     struct amdgpu_vm_fault_info     fault_info;
>  };
>  #endif
>
> --
> 2.34.1