Re:RE: [PATCH v2] drm/amd/amdgpu: cleanup coding style a bit

[Bernard]

发件人："Ruhl, Michael J" <michael.j.ruhl at intel.com>
发送日期：2020-05-08 23:45:07
收件人：Bernard Zhao <bernard at vivo.com>,Alex Deucher <alexander.deucher at amd.com>,"Christian König" <christian.koenig at amd.com>,"David (ChunMing) Zhou" <David1.Zhou at amd.com>,David Airlie <airlied at linux.ie>,Daniel Vetter <daniel at ffwll.ch>,Tom St Denis <tom.stdenis at amd.com>,Sam Ravnborg <sam at ravnborg.org>,Ori Messinger <Ori.Messinger at amd.com>,"amd-gfx at lists.freedesktop.org" <amd-gfx at lists.freedesktop.org>,"dri-devel at lists.freedesktop.org" <dri-devel at lists.freedesktop.org>,"linux-kernel at vger.kernel.org" <linux-kernel at vger.kernel.org>
抄送人："opensource.kernel at vivo.com" <opensource.kernel at vivo.com>
主题：RE: [PATCH v2] drm/amd/amdgpu: cleanup coding style a bit>>-----Original Message-----
>>From: dri-devel <dri-devel-bounces at lists.freedesktop.org> On Behalf Of
>>Bernard Zhao
>>Sent: Thursday, May 7, 2020 5:13 AM
>>To: Alex Deucher <alexander.deucher at amd.com>; Christian König
>><christian.koenig at amd.com>; David (ChunMing) Zhou
>><David1.Zhou at amd.com>; David Airlie <airlied at linux.ie>; Daniel Vetter
>><daniel at ffwll.ch>; Tom St Denis <tom.stdenis at amd.com>; Sam Ravnborg
>><sam at ravnborg.org>; Ori Messinger <Ori.Messinger at amd.com>; Bernard
>>Zhao <bernard at vivo.com>; amd-gfx at lists.freedesktop.org; dri-
>>devel at lists.freedesktop.org; linux-kernel at vger.kernel.org
>>Cc: opensource.kernel at vivo.com
>>Subject: [PATCH v2] drm/amd/amdgpu: cleanup coding style a bit
>>
>>There is DEVICE_ATTR mechanism in separate attribute define.
>>So this change is to use attr array, also use
>>sysfs_create_files in init function & sysfs_remove_files in
>>fini function.
>>This maybe make the code a bit readable.
>>
>>Signed-off-by: Bernard Zhao <bernard at vivo.com>
>>
>>Changes since V1:
>>*Use DEVICE_ATTR mechanism
>>
>>Link for V1:
>>*https://lore.kernel.org/patchwork/patch/1228076/
>>---
>> drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 43 ++++++-------------
>>-
>> 1 file changed, 13 insertions(+), 30 deletions(-)
>>
>>diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>index 82a3299e53c0..57bbc70662ff 100644
>>--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>@@ -148,6 +148,15 @@ static DEVICE_ATTR(mem_info_vis_vram_used,
>>S_IRUGO,
>> static DEVICE_ATTR(mem_info_vram_vendor, S_IRUGO,
>> 		   amdgpu_mem_info_vram_vendor, NULL);
>>
>>+static struct attribute *amdgpu_vram_mgr_attributes[] = {
>>+	&dev_attr_mem_info_vram_total.attr,
>>+	&dev_attr_mem_info_vis_vram_total.attr,
>>+	&dev_attr_mem_info_vram_used.attr,
>>+	&dev_attr_mem_info_vis_vram_used.attr,
>>+	&dev_attr_mem_info_vram_vendor.attr,
>>+	NULL
>>+};
>>+
>> /**
>>  * amdgpu_vram_mgr_init - init VRAM manager and DRM MM
>>  *
>>@@ -172,31 +181,9 @@ static int amdgpu_vram_mgr_init(struct
>>ttm_mem_type_manager *man,
>> 	man->priv = mgr;
>>
>> 	/* Add the two VRAM-related sysfs files */
>>-	ret = device_create_file(adev->dev,
>>&dev_attr_mem_info_vram_total);
>>-	if (ret) {
>>-		DRM_ERROR("Failed to create device file
>>mem_info_vram_total\n");
>>-		return ret;
>>-	}
>>-	ret = device_create_file(adev->dev,
>>&dev_attr_mem_info_vis_vram_total);
>>-	if (ret) {
>>-		DRM_ERROR("Failed to create device file
>>mem_info_vis_vram_total\n");
>>-		return ret;
>>-	}
>>-	ret = device_create_file(adev->dev,
>>&dev_attr_mem_info_vram_used);
>>-	if (ret) {
>>-		DRM_ERROR("Failed to create device file
>>mem_info_vram_used\n");
>>-		return ret;
>>-	}
>>-	ret = device_create_file(adev->dev,
>>&dev_attr_mem_info_vis_vram_used);
>>-	if (ret) {
>>-		DRM_ERROR("Failed to create device file
>>mem_info_vis_vram_used\n");
>>-		return ret;
>>-	}
>>-	ret = device_create_file(adev->dev,
>>&dev_attr_mem_info_vram_vendor);
>>-	if (ret) {
>>-		DRM_ERROR("Failed to create device file
>>mem_info_vram_vendor\n");
>>-		return ret;
>>-	}
>>+	ret = sysfs_create_files(&adev->dev->kobj,
>>amdgpu_vram_mgr_attributes);
>>+	if (ret)
>>+		DRM_ERROR("Failed to register sysfs\n");
>
>This looks good to me.
>
>I think that there is a new error macro (drm_err?) that you might
>want to use instead of DRM_ERROR().
>
>Otherwise:
>
>Acked-by: Michael J. Ruhl <michael.j.ruhl at intel.com>
>
>m

Hi
Sure, I am willing to make this modification, also in GPU TODO list, there is one content:
"Convert logging to drm_* functions with drm_device paramater,For drivers which could 
have multiple instances, it is necessary to differentiate between which is which in the logs. 
Since DRM_INFO/WARN/ERROR don’t do this, drivers used dev_info/warn/err to make 
this differentiation. We now have drm_* variants of the drm print functions, so we can start 
to convert those drivers back to using drm-formatted specific log messages."
From https://www.kernel.org/doc/html/v5.7-rc5/gpu/todo.html#subsystem-wide-refactorings.

But i have to say that now in the DRM/AMD modules, all are used DRM_INFO/WARNING/ERROR
I'm not sure weather maintainers want to replace these.

Regards,
Bernard

>>
>> 	return 0;
>> }
>>@@ -219,11 +206,7 @@ static int amdgpu_vram_mgr_fini(struct
>>ttm_mem_type_manager *man)
>> 	spin_unlock(&mgr->lock);
>> 	kfree(mgr);
>> 	man->priv = NULL;
>>-	device_remove_file(adev->dev, &dev_attr_mem_info_vram_total);
>>-	device_remove_file(adev->dev,
>>&dev_attr_mem_info_vis_vram_total);
>>-	device_remove_file(adev->dev, &dev_attr_mem_info_vram_used);
>>-	device_remove_file(adev->dev,
>>&dev_attr_mem_info_vis_vram_used);
>>-	device_remove_file(adev->dev,
>>&dev_attr_mem_info_vram_vendor);
>>+	sysfs_remove_files(&adev->dev->kobj,
>>amdgpu_vram_mgr_attributes);
>> 	return 0;
>> }
>>
>>--
>>2.26.2
>>
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