From nobody Thu Oct 9 01:16:26 2025 Received: from cstnet.cn (smtp21.cstnet.cn [159.226.251.21]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7652D23BD1A; Mon, 23 Jun 2025 10:04:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.21 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750673087; cv=none; b=csxW2N2V27XyKtltBv+DSj5mSGyrkD/HR2YmMTrxvXAKYss6a0LG4yeujAG3GrxJVw/r0TAxWAgBb7O4EmQAcKFaDD86mu3WJ4Mt5S2XdIeUel7oarj0nJIT67ESBjOvMvsdWJNAORYWyjlfnWVMvgLn7txv8gLOUVGxGD3500E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750673087; c=relaxed/simple; bh=1e6X1Y97u+9LYEaGy4t4Tu9uuXbMaIC4xIFW5/A2uYs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=P5oyC18mC7PzFkZBM63VMPwwfECkAjekCvz3CasbIeAo1G8HKWT3qCPXzOoTTMAr1r8Vb7cSElm9jecEpi/0OMJZkZikp9lGyclngIA0wguer3XnMhh5oIAXHrHGXgR+Yv3a9Bpi7ppHM0J0HarREtl0s8jvshI/XHDBvmOhfwY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.21 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from [127.0.0.2] (unknown [210.73.43.2]) by APP-01 (Coremail) with SMTP id qwCowAD3ptWtJlloxg+rCA--.29805S3; Mon, 23 Jun 2025 18:04:30 +0800 (CST) From: Vivian Wang Date: Mon, 23 Jun 2025 18:04:16 +0800 Subject: [PATCH 1/3] riscv: dts: spacemit: Add DMA translation buses for K1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250623-k1-dma-buses-rfc-wip-v1-1-c0144082061f@iscas.ac.cn> References: <20250623-k1-dma-buses-rfc-wip-v1-0-c0144082061f@iscas.ac.cn> In-Reply-To: <20250623-k1-dma-buses-rfc-wip-v1-0-c0144082061f@iscas.ac.cn> To: Yixun Lan , Guodong Xu , Ze Huang , Alex Elder , spacemit@lists.linux.dev, Rob Herring , Krzysztof Kozlowski , Conor Dooley , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti Cc: Vivian Wang , devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Vivian Wang X-Mailer: b4 0.14.2 X-CM-TRANSID: qwCowAD3ptWtJlloxg+rCA--.29805S3 X-Coremail-Antispam: 1UD129KBjvJXoW7Kr13KFWxuF13Kw18uF15Jwb_yoW8KryUpr WDArs5GrW8tF47Aw43ArW2qw15JF40kF4kGr12yry5ArnYqr4Utr4Ut34fGFyUJF4UXwnF qFsrAr1UKF1DJw7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUmE14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_Jr4l82xGYIkIc2 x26xkF7I0E14v26r4j6ryUM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Cr0_Gr1UM2 8EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0DM2AI xVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20x vE14v26r106r15McIj6I8E87Iv67AKxVW8Jr0_Cr1UMcvjeVCFs4IE7xkEbVWUJVW8JwAC jcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lFIxGxcIEc7CjxVA2Y2ka0x kIwI1lc7CjxVAaw2AFwI0_GFv_Wrylc2xSY4AK67AK6r4DMxAIw28IcxkI7VAKI48JMxC2 0s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI 0_JrI_JrWlx4CE17CEb7AF67AKxVW8ZVWrXwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE 14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwCI42IY6xAIw20EY4v20x vaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267AKxVW8 JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7sRExwI7UUUUU== X-CM-SenderInfo: pzdqw2pxlnt03j6l2u1dvotugofq/ The SpacemiT K1 has various static translations of DMA accesses. Add these as simple-bus nodes with dma-ranges. Devices actually using these translations will be added to or moved inside the bus nodes in later patches. The bus names are assigned according to consensus with SpacemiT [1]. Link: https://lore.kernel.org/r/CAH1PCMaC+imcMZCFYtRdmH6ge=3DdPgnANn_GqVfsG= RS=3D+YhyJCw@mail.gmail.com [1] Signed-off-by: Vivian Wang Reviewed-by: Guodong Xu --- arch/riscv/boot/dts/spacemit/k1.dtsi | 53 ++++++++++++++++++++++++++++++++= ++++ 1 file changed, 53 insertions(+) diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spa= cemit/k1.dtsi index 14097f1f6f447bd33ff3aaa07382d27ca8e59a48..99c76997b367f733c9dda2c30dd= 85817294ef9b7 100644 --- a/arch/riscv/boot/dts/spacemit/k1.dtsi +++ b/arch/riscv/boot/dts/spacemit/k1.dtsi @@ -571,5 +571,58 @@ sec_uart1: serial@f0612000 { reg-io-width =3D <4>; status =3D "reserved"; /* for TEE usage */ }; + + camera-bus { + compatible =3D "simple-bus"; + ranges; + #address-cells =3D <2>; + #size-cells =3D <2>; + dma-ranges =3D <0x0 0x00000000 0x0 0x00000000 0x0 0x80000000>, + <0x0 0x80000000 0x1 0x00000000 0x1 0x80000000>; + }; + + dma-bus { + compatible =3D "simple-bus"; + ranges; + #address-cells =3D <2>; + #size-cells =3D <2>; + dma-ranges =3D <0x0 0x00000000 0x0 0x00000000 0x0 0x80000000>, + <0x1 0x00000000 0x1 0x80000000 0x3 0x00000000>; + }; + + multimedia-bus { + compatible =3D "simple-bus"; + ranges; + #address-cells =3D <2>; + #size-cells =3D <2>; + dma-ranges =3D <0x0 0x00000000 0x0 0x00000000 0x0 0x80000000>, + <0x0 0x80000000 0x1 0x00000000 0x3 0x80000000>; + }; + + network-bus { + compatible =3D "simple-bus"; + ranges; + #address-cells =3D <2>; + #size-cells =3D <2>; + dma-ranges =3D <0x0 0x00000000 0x0 0x00000000 0x0 0x80000000>, + <0x0 0x80000000 0x1 0x00000000 0x0 0x80000000>; + }; + + pcie-bus { + compatible =3D "simple-bus"; + ranges; + #address-cells =3D <2>; + #size-cells =3D <2>; + dma-ranges =3D <0x0 0x00000000 0x0 0x00000000 0x0 0x80000000>, + <0x0 0xb8000000 0x1 0x38000000 0x3 0x48000000>; + }; + + storage-bus { + compatible =3D "simple-bus"; + ranges; + #address-cells =3D <2>; + #size-cells =3D <2>; + dma-ranges =3D <0x0 0x00000000 0x0 0x00000000 0x0 0x80000000>; + }; }; }; --=20 2.49.0