From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from xry111.site (xry111.site [89.208.246.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A399A12F373 for ; Mon, 17 Jun 2024 15:35:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=89.208.246.23 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718638551; cv=none; b=f1vQe3tq5W2TeRwzrXFVLFGJVnG8IGL4T+EK/DX9aDMDdNhLE86GBtVH5csj32QYd55zAwMCj1woJxB+I6RZRGYthaTMwHme4rICoQjM56Ag+O3GFrLYaFII8LdAwO9sLZ0dzZkr6P44cOwq5DrEG/tdb9aUmLaAPHr3QnYcrBk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718638551; c=relaxed/simple; bh=c7Ne3E0RAcjQQpufIt0xSyD5MfaGm6a4FInMzdzowj0=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=oCreTyA7+vrlkqTdoQlMqHWms05tn1uB29GWYqNhgn4yulSe9wAs2dQlaRiJPcNY0Nfj2/2bR2KxAFfNO/8aA5brNC4sDhysU6S9Erw8UOMSHriDS5YA9revVehjuC2GNDOlBnpGRR3Sh4ifs6R/5KPzHN9SpkrJNvuBh0Qv3cM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=xry111.site; spf=pass smtp.mailfrom=xry111.site; dkim=pass (1024-bit key) header.d=xry111.site header.i=@xry111.site header.b=Dg1qfJ4n; arc=none smtp.client-ip=89.208.246.23 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=xry111.site Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=xry111.site Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=xry111.site header.i=@xry111.site header.b="Dg1qfJ4n" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=xry111.site; s=default; t=1718638547; bh=c7Ne3E0RAcjQQpufIt0xSyD5MfaGm6a4FInMzdzowj0=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=Dg1qfJ4nJNei4EcLrlqmvHQWJppfrXCN7kivxzBGhmIM2ab6rjlzWx+NICGMZ0ugP 51Wy6tiAeSsI0PwkoCHx8oSKaQsqEWE1n779LcQyOJ29JgMW1yqyFiakej18s/nbQS np8+MGxOvGWHBGVVsF+YVpHKhJmhP9WmT1xnoWno= Received: from [IPv6:240e:358:11e5:c700:dc73:854d:832e:2] (unknown [IPv6:240e:358:11e5:c700:dc73:854d:832e:2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature ECDSA (P-384) server-digest SHA384) (Client did not present a certificate) (Authenticated sender: xry111@xry111.site) by xry111.site (Postfix) with ESMTPSA id 7428967547; Mon, 17 Jun 2024 11:35:41 -0400 (EDT) Message-ID: Subject: Re: [PATCH 1/2] drm/amdgpu: make duplicated EOP packet for GFX7/8 have real content From: Xi Ruoyao To: Icenowy Zheng , Christian =?ISO-8859-1?Q?K=F6nig?= , Alex Deucher , Pan Xinhui , David Airlie , Daniel Vetter , Pierre-Eric Pelloux-Prayer , Huacai Chen , WANG Xuerui Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev Date: Mon, 17 Jun 2024 23:35:33 +0800 In-Reply-To: <1e5f86991635b9045e91fab6397cda87555f85ff.camel@icenowy.me> References: <20240617105846.1516006-1-uwu@icenowy.me> <20240617105846.1516006-2-uwu@icenowy.me> <88337509-3ad7-47aa-b70f-5294f7f1e486@amd.com> <09fbcd1f-c7b1-47e3-9146-17f8189978a8@amd.com> <1e5f86991635b9045e91fab6397cda87555f85ff.camel@icenowy.me> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.52.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Mon, 2024-06-17 at 22:30 +0800, Icenowy Zheng wrote: > > Two consecutive writes to the same bus address are perfectly legal > > from=20 > > the PCIe specification and can happen all the time, even without this > > specific hw workaround. >=20 > Yes I know it, and I am not from Loongson, just some user trying to > mess around it. There are some purposed "workarounds" like reducing the link speed (from x16 to x8), tweaking the power management setting, etc. Someone even claims improving the heat sink of the LS7A chip can help to work around this issue but I'm really skeptical... --=20 Xi Ruoyao School of Aerospace Science and Technology, Xidian University