[PATCH] drm/amdgpu : Increase the mes log buffer size as per new MES FW version

[Liu, Shaoyun]

[AMD Official Use Only - General]

It can  cause page fault  when the  log size exceed the  page size .

-----Original Message-----
From: Kuehling, Felix <Felix.Kuehling at amd.com>
Sent: Monday, March 25, 2024 2:58 PM
To: Liu, Shaoyun <Shaoyun.Liu at amd.com>; amd-gfx at lists.freedesktop.org
Subject: Re: [PATCH] drm/amdgpu : Increase the mes log buffer size as per new MES FW version


On 2024-03-22 12:49, shaoyunl wrote:
>  From MES version 0x54, the log entry increased and require the log
> buffer size to be increased. The 16k is maximum size agreed

What happens when you run the new firmware on an old kernel that only allocates 4KB?

Regards,
   Felix


>
> Signed-off-by: shaoyunl <shaoyun.liu at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c | 5 ++---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h | 1 +
>   2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
> index 9ace848e174c..78e4f88f5134 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
> @@ -103,7 +103,7 @@ static int amdgpu_mes_event_log_init(struct amdgpu_device *adev)
>       if (!amdgpu_mes_log_enable)
>               return 0;
>
> -     r = amdgpu_bo_create_kernel(adev, PAGE_SIZE, PAGE_SIZE,
> +     r = amdgpu_bo_create_kernel(adev, AMDGPU_MES_LOG_BUFFER_SIZE,
> +PAGE_SIZE,
>                                   AMDGPU_GEM_DOMAIN_GTT,
>                                   &adev->mes.event_log_gpu_obj,
>                                   &adev->mes.event_log_gpu_addr, @@ -1548,12 +1548,11 @@
> static int amdgpu_debugfs_mes_event_log_show(struct seq_file *m, void *unused)
>       uint32_t *mem = (uint32_t *)(adev->mes.event_log_cpu_addr);
>
>       seq_hex_dump(m, "", DUMP_PREFIX_OFFSET, 32, 4,
> -                  mem, PAGE_SIZE, false);
> +                  mem, AMDGPU_MES_LOG_BUFFER_SIZE, false);
>
>       return 0;
>   }
>
> -
>   DEFINE_SHOW_ATTRIBUTE(amdgpu_debugfs_mes_event_log);
>
>   #endif
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
> index 7d4f93fea937..4c8fc3117ef8 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
> @@ -52,6 +52,7 @@ enum amdgpu_mes_priority_level {
>
>   #define AMDGPU_MES_PROC_CTX_SIZE 0x1000 /* one page area */
>   #define AMDGPU_MES_GANG_CTX_SIZE 0x1000 /* one page area */
> +#define AMDGPU_MES_LOG_BUFFER_SIZE 0x4000 /* Maximu log buffer size
> +for MES */
>
>   struct amdgpu_mes_funcs;
>