linux-kernel - Re: [PATCH v3 3/7] drm/amdgpu: Switch to fdinfo helper

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Message-ID: <ZDZkocmppPAGdkdv@phenom.ffwll.local>
Date:   Wed, 12 Apr 2023 09:58:25 +0200
From:   Daniel Vetter <daniel@...ll.ch>
To:     Rob Clark <robdclark@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org,
        Boris Brezillon <boris.brezillon@...labora.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        Christopher Healy <healych@...zon.com>,
        Emil Velikov <emil.l.velikov@...il.com>,
        Rob Clark <robdclark@...omium.org>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Hawking Zhang <Hawking.Zhang@....com>,
        Evan Quan <evan.quan@....com>,
        Mario Limonciello <mario.limonciello@....com>,
        Guchun Chen <guchun.chen@....com>,
        YiPeng Chai <YiPeng.Chai@....com>,
        Michel Dänzer <mdaenzer@...hat.com>,
        Shashank Sharma <shashank.sharma@....com>,
        Tvrtko Ursulin <tvrtko.ursulin@...el.com>,
        Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@....com>,
        "open list:RADEON and AMDGPU DRM DRIVERS" 
        <amd-gfx@...ts.freedesktop.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 3/7] drm/amdgpu: Switch to fdinfo helper

On Tue, Apr 11, 2023 at 03:56:08PM -0700, Rob Clark wrote:
> From: Rob Clark <robdclark@...omium.org>
> 
> Signed-off-by: Rob Clark <robdclark@...omium.org>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c    |  3 ++-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.c | 16 ++++++----------
>  drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.h |  2 +-
>  3 files changed, 9 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index f5ffca24def4..3611cfd5f076 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -2752,7 +2752,7 @@ static const struct file_operations amdgpu_driver_kms_fops = {
>  	.compat_ioctl = amdgpu_kms_compat_ioctl,
>  #endif
>  #ifdef CONFIG_PROC_FS
> -	.show_fdinfo = amdgpu_show_fdinfo
> +	.show_fdinfo = drm_fop_show_fdinfo,
>  #endif
>  };
>  
> @@ -2807,6 +2807,7 @@ static const struct drm_driver amdgpu_kms_driver = {
>  	.dumb_map_offset = amdgpu_mode_dumb_mmap,
>  	.fops = &amdgpu_driver_kms_fops,
>  	.release = &amdgpu_driver_release_kms,
> +	.show_fdinfo = amdgpu_show_fdinfo,
>  
>  	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
>  	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.c
> index 99a7855ab1bc..c2fdd5e448d1 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.c
> @@ -53,9 +53,8 @@ static const char *amdgpu_ip_name[AMDGPU_HW_IP_NUM] = {
>  	[AMDGPU_HW_IP_VCN_JPEG]	=	"jpeg",
>  };
>  
> -void amdgpu_show_fdinfo(struct seq_file *m, struct file *f)
> +void amdgpu_show_fdinfo(struct drm_printer *p, struct drm_file *file)
>  {
> -	struct drm_file *file = f->private_data;
>  	struct amdgpu_device *adev = drm_to_adev(file->minor->dev);
>  	struct amdgpu_fpriv *fpriv = file->driver_priv;
>  	struct amdgpu_vm *vm = &fpriv->vm;
> @@ -86,18 +85,15 @@ void amdgpu_show_fdinfo(struct seq_file *m, struct file *f)
>  	 * ******************************************************************
>  	 */
>  
> -	seq_printf(m, "pasid:\t%u\n", fpriv->vm.pasid);
> -	seq_printf(m, "drm-driver:\t%s\n", file->minor->dev->driver->name);
> -	seq_printf(m, "drm-pdev:\t%04x:%02x:%02x.%d\n", domain, bus, dev, fn);
> -	seq_printf(m, "drm-client-id:\t%Lu\n", vm->immediate.fence_context);
> -	seq_printf(m, "drm-memory-vram:\t%llu KiB\n", vram_mem/1024UL);
> -	seq_printf(m, "drm-memory-gtt: \t%llu KiB\n", gtt_mem/1024UL);
> -	seq_printf(m, "drm-memory-cpu: \t%llu KiB\n", cpu_mem/1024UL);
> +	drm_printf(p, "pasid:\t%u\n", fpriv->vm.pasid);
> +	drm_printf(p, "drm-memory-vram:\t%llu KiB\n", vram_mem/1024UL);
> +	drm_printf(p, "drm-memory-gtt: \t%llu KiB\n", gtt_mem/1024UL);
> +	drm_printf(p, "drm-memory-cpu: \t%llu KiB\n", cpu_mem/1024UL);

random aside, but we're not super consistent here, some of these have an
additional ' ' space.

I guess a next step would be a drm_fdinfo_printf(drm_printer *p, const
char *name, const char *printf, ...) and maybe some specialized ones that
dtrt for specific parameters, like drm_fdinfo_llu().

But that's for next one I guess :-)
-Daniel


>  	for (hw_ip = 0; hw_ip < AMDGPU_HW_IP_NUM; ++hw_ip) {
>  		if (!usage[hw_ip])
>  			continue;
>  
> -		seq_printf(m, "drm-engine-%s:\t%Ld ns\n", amdgpu_ip_name[hw_ip],
> +		drm_printf(p, "drm-engine-%s:\t%Ld ns\n", amdgpu_ip_name[hw_ip],
>  			   ktime_to_ns(usage[hw_ip]));
>  	}
>  }
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.h
> index e86834bfea1d..0398f5a159ef 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.h
> @@ -37,6 +37,6 @@
>  #include "amdgpu_ids.h"
>  
>  uint32_t amdgpu_get_ip_count(struct amdgpu_device *adev, int id);
> -void amdgpu_show_fdinfo(struct seq_file *m, struct file *f);
> +void amdgpu_show_fdinfo(struct drm_printer *p, struct drm_file *file);
>  
>  #endif
> -- 
> 2.39.2
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch