Cover Letter Detail
Show a cover letter.
GET /api/covers/2218225/?format=api
{ "id": 2218225, "url": "http://patchwork.ozlabs.org/api/covers/2218225/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/cover/20260331171248.973014-1-gaohan@iscas.ac.cn/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/projects/28/?format=api", "name": "Linux PCI development", "link_name": "linux-pci", "list_id": "linux-pci.vger.kernel.org", "list_email": "linux-pci@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260331171248.973014-1-gaohan@iscas.ac.cn>", "list_archive_url": null, "date": "2026-03-31T17:12:46", "name": "[0/2] riscv: sophgo: sg2042: Enable PCIe DMA coherence", "submitter": { "id": 92681, "url": "http://patchwork.ozlabs.org/api/people/92681/?format=api", "name": "Han Gao", "email": "gaohan@iscas.ac.cn" }, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/cover/20260331171248.973014-1-gaohan@iscas.ac.cn/mbox/", "series": [ { "id": 498232, "url": "http://patchwork.ozlabs.org/api/series/498232/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=498232", "date": "2026-03-31T17:12:47", "name": "riscv: sophgo: sg2042: Enable PCIe DMA coherence", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498232/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2218225/comments/", "headers": { "Return-Path": "\n <linux-pci+bounces-51592-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-pci@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; helo=sea.lore.kernel.org;\n envelope-from=linux-pci+bounces-51592-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)", "smtp.subspace.kernel.org;\n arc=none smtp.client-ip=159.226.251.81", "smtp.subspace.kernel.org;\n dmarc=none (p=none dis=none) header.from=iscas.ac.cn", "smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=iscas.ac.cn" ], "Received": [ "from sea.lore.kernel.org (sea.lore.kernel.org [172.234.253.10])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4flbJp5DX5z1yGH\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 01 Apr 2026 04:51:22 +1100 (AEDT)", "from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby sea.lore.kernel.org (Postfix) with ESMTP id 3E76631BA4E8\n\tfor <incoming@patchwork.ozlabs.org>; Tue, 31 Mar 2026 17:13:47 +0000 (UTC)", "from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 23E02322C88;\n\tTue, 31 Mar 2026 17:13:07 +0000 (UTC)", "from cstnet.cn (smtp81.cstnet.cn [159.226.251.81])\n\t(using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id DC6F531D366;\n\tTue, 31 Mar 2026 17:13:04 +0000 (UTC)", "from localhost.localdomain (unknown [223.166.95.230])\n\tby APP-03 (Coremail) with SMTP id rQCowABnhdyRAMxpydRzDA--.42156S2;\n\tWed, 01 Apr 2026 01:12:50 +0800 (CST)" ], "ARC-Seal": "i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1774977187; cv=none;\n b=RsNcuZ6J/WVDNe+kZtCbF9P2PIOHPtYXn8poq/V//3gyDQvCHQf0gVJh3dhLrVYLck6A+KRw4b0+b9pGU+0Kq+aHSY9Qmi/aHxpHPoIYh0cWmroStOFIPBi/0GND1DS2hAxJnFOT6hssaaRTeGkm2Bc9zwsjzh7+oxWS/DH7clo=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1774977187; c=relaxed/simple;\n\tbh=86GbQFzTZ0huTRYyz379S7ayUIzfenjwN7Y5u7weLuI=;\n\th=From:To:Cc:Subject:Date:Message-ID:MIME-Version;\n b=ksS7Ht1MIjWuWpODa2PdeWgSWDkNXz/K2gFAPesXhgMfEW3qQMfhIpK55m01XrdRFpf5Ag9KwHrvVNi7H/E9SJPaJfu9Uecdzj0MAENUHWCAqUfflg/cCoHUmUwjjHLZ5q/QXJjxBkOrzVlx36j03i3UFNPYE8yWocv44T3U1+Y=", "ARC-Authentication-Results": "i=1; smtp.subspace.kernel.org;\n dmarc=none (p=none dis=none) header.from=iscas.ac.cn;\n spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.81", "From": "Han Gao <gaohan@iscas.ac.cn>", "To": "Bjorn Helgaas <bhelgaas@google.com>,\n Lorenzo Pieralisi <lpieralisi@kernel.org>, =?utf-8?q?Krzysztof_Wilczy=C5=84?=\n\t=?utf-8?q?ski?= <kwilczynski@kernel.org>,\n Manivannan Sadhasivam <mani@kernel.org>, Rob Herring <robh@kernel.org>,\n Krzysztof Kozlowski <krzk+dt@kernel.org>, Conor Dooley <conor+dt@kernel.org>,\n Chen Wang <unicorn_wang@outlook.com>, Inochi Amaoto <inochiama@gmail.com>,\n Paul Walmsley <pjw@kernel.org>, Palmer Dabbelt <palmer@dabbelt.com>,\n Albert Ou <aou@eecs.berkeley.edu>, Alexandre Ghiti <alex@ghiti.fr>,\n Han Gao <gaohan@iscas.ac.cn>, Zixian Zeng <sycamoremoon376@gmail.com>", "Cc": "linux-pci@vger.kernel.org,\n\tdevicetree@vger.kernel.org,\n\tsophgo@lists.linux.dev,\n\tlinux-kernel@vger.kernel.org,\n\tlinux-riscv@lists.infradead.org,\n\tHan Gao <rabenda.cn@gmail.com>", "Subject": "[PATCH 0/2] riscv: sophgo: sg2042: Enable PCIe DMA coherence", "Date": "Wed, 1 Apr 2026 01:12:46 +0800", "Message-ID": "<20260331171248.973014-1-gaohan@iscas.ac.cn>", "X-Mailer": "git-send-email 2.47.3", "Precedence": "bulk", "X-Mailing-List": "linux-pci@vger.kernel.org", "List-Id": "<linux-pci.vger.kernel.org>", "List-Subscribe": "<mailto:linux-pci+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-pci+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-CM-TRANSID": "rQCowABnhdyRAMxpydRzDA--.42156S2", "X-Coremail-Antispam": "1UD129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7v73\n\tVFW2AGmfu7bjvjm3AaLaJ3UjIYCTnIWjp_UUUYm7AC8VAFwI0_Xr0_Wr1l1xkIjI8I6I8E\n\t6xAIw20EY4v20xvaj40_Wr0E3s1l1IIY67AEw4v_Jr0_Jr4l8cAvFVAK0II2c7xJM28Cjx\n\tkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWUCVW8JwA2z4x0Y4vE2Ix0cI8I\n\tcVCY1x0267AKxVW8JVWxJwA2z4x0Y4vEx4A2jsIE14v26F4j6r4UJwA2z4x0Y4vEx4A2js\n\tIEc7CjxVAFwI0_Gr1j6F4UJwAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAK\n\tzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx\n\t8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIF\n\txwACI402YVCY1x02628vn2kIc2xKxwCF04k20xvY0x0EwIxGrwCF54CYxVCY1x0262kKe7\n\tAKxVW8ZVWrXwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I\n\t3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_GFv_WrylIxkGc2Ij64vIr41lIx\n\tAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAI\n\tcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2js\n\tIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUQvtAUUUUU=", "X-CM-SenderInfo": "xjdrxt3q6l2u1dvotugofq/1tbiBg0DDGnL4ih7xAAAsT" }, "content": "The SG2042 hardware design supports cache-coherent PCIe.\n\nWith recent firmware updates [1], it allows to use DMA coherent.\n\n[1] https://github.com/sophgo/edk2-non-osi/commit/017a5aea26a066fd2bf501b7893937183165af36\n\nHan Gao (2):\n dt-bindings: pci: sophgo: Add dma-coherent property for SG2042\n riscv: dts: sophgo: Add dma-coherent to SG2042 PCIe controllers\n\n .../devicetree/bindings/pci/sophgo,sg2042-pcie-host.yaml | 3 +++\n arch/riscv/boot/dts/sophgo/sg2042.dtsi | 4 ++++\n 2 files changed, 7 insertions(+)" }