From patchwork Fri May 31 15:07:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 13681788 Received: from mx07-00178001.pphosted.com (mx07-00178001.pphosted.com [185.132.182.106]) (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 6D094155C9C; Fri, 31 May 2024 15:08:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.132.182.106 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717168127; cv=none; b=AC3pO3dwpPa/BaREYDwsqPvLEBSrQDAT0+hPHOODYX4aRJ7Gnzr5McQvvovl/9Q4dZUQDYRZZ8FYD72O3kVIZC2RUOZPZLAA58OkNmaP6WSJ5KZ5RIZ7LRvxwt0uX7YgVXiGWYo1y3Pc4S7oVDXlWgBx/09zb1ssj3TvoqVX1Xg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717168127; c=relaxed/simple; bh=S/2HgYDcsPgUIHZNPE1o7C4K8GYl+f7zW1+VqrCj6R0=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=bcN41DTDGgS4CjwapaR+eDdcDL5kxuEkDcpZmOmoozBA8jGFiC5clBeX57Ti+Q0SYHT8Q5iI8gY9tkz+o5ZYyeJdh4sCZUtKB4bMUWjcXuuWp4JUFifM2CYhJcPvdMvMW0tsE9fF6FtzDpx8XT/b/mgg/e1gz3ez/Zs5dA9L7tM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foss.st.com; spf=pass smtp.mailfrom=foss.st.com; dkim=pass (2048-bit key) header.d=foss.st.com header.i=@foss.st.com header.b=GILMG8zW; arc=none smtp.client-ip=185.132.182.106 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foss.st.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=foss.st.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=foss.st.com header.i=@foss.st.com header.b="GILMG8zW" Received: from pps.filterd (m0241204.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 44VEYxTk002355; Fri, 31 May 2024 17:08:16 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h= cc:content-transfer-encoding:content-type:date:from:message-id :mime-version:subject:to; s=selector1; bh=6USuD96uu4MM6nbAWJ3YVs bwLkvBfK0BxbUwgRQnTLg=; b=GILMG8zWvp3xQvmGvyPa1P0njrIyTGrb7ubnO8 4H5hhJwSN45rPz3yQge07ErB5lXVkyDR/IUtg8NfCYUqfgrwKqKeWjYqHNg5ai0F znoT1yQgNVeZB+1+yhWWkzClVjTjjcqQtQTVxGb0JAd8tUT1vn7hZpj4UZ3WkpKq 8OmsSbdhPFVSgQ04w6bNNKwuortvO3Q45PDUdS3J8C60yyI6/9mlcLeKpAmmBK2w amrstuDAqJryzStBzLYQkr3upJnpPytnnKF/AxpSqIRu1oyFm+1boag9Z2AesgrR fU1an2+21aCKkSpl0b30IfC9lwQ6dj3Ev8tMt68i1rUwZgEw== Received: from beta.dmz-ap.st.com (beta.dmz-ap.st.com [138.198.100.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 3yb9yymj96-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 31 May 2024 17:08:15 +0200 (MEST) Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-ap.st.com (STMicroelectronics) with ESMTP id 2FBC940047; Fri, 31 May 2024 17:08:02 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node3.st.com [10.75.129.71]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 2C2FB22364C; Fri, 31 May 2024 17:07:16 +0200 (CEST) Received: from localhost (10.252.27.179) by SHFDAG1NODE3.st.com (10.75.129.71) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Fri, 31 May 2024 17:07:15 +0200 From: Amelie Delaunay To: Vinod Koul , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Maxime Coquelin , Alexandre Torgue CC: , , , , , , Amelie Delaunay Subject: [PATCH v4 00/12] Introduce STM32 DMA3 support Date: Fri, 31 May 2024 17:07:00 +0200 Message-ID: <20240531150712.2503554-1-amelie.delaunay@foss.st.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: EQNCAS1NODE4.st.com (10.75.129.82) To SHFDAG1NODE3.st.com (10.75.129.71) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.650,FMLib:17.12.28.16 definitions=2024-05-31_11,2024-05-30_01,2024-05-17_01 STM32 DMA3 is a direct memory access controller with different features depending on its hardware configuration. It is either called LPDMA (Low Power), GPDMA (General Purpose) or HPDMA (High Performance), and it can be found in new STM32 MCUs and MPUs. In STM32MP25 SoC [1], 3 HPDMAs and 1 LPDMA are embedded. Only HPDMAs are used by Linux. Before adding this new driver, this series gathers existing STM32 DMA drivers and bindings under stm32/ subdirectory and adds an entry in MAINTAINERS file. To ease review, the initial "dmaengine: Add STM32 DMA3 support" has been split into functionnalities. Patches 6 to 9 can be squashed into patch 5. Patch 10 has already been proposed [2], the API is now used in stm32-dma3 driver. Indeed, STM32 DMA3 channels can be individually reserved either because they are secure, or dedicated to another CPU. These channels are not registered in dmaengine, so id is not incremented, but, using the new API to specify the channel name, channel name matches the name in the Reference Manual and ease requesting a channel thanks to its name. [1] https://www.st.com/resource/en/reference_manual/rm0457-stm32mp25xx-advanced-armbased-3264bit-mpus-stmicroelectronics.pdf [2] https://lore.kernel.org/lkml/20231213174021.3074759-1-amelie.delaunay@foss.st.com/ v4: - address Frank's remarks about patch 5: comments alignment, use __packed for stm32_dma3_hwdesc structure, use dma_wmb() instead of __iowmb(); about patch 6: remove wrong MEM_TO_MEM comment v3: - address Rob's remarks about st,stm32-dma3.yaml (wrap at 80, remove useless '|') - address Frank's remarks about patch 5: improve commit message and ensure descriptors availability before starting the channel v2: - fix reference in spi/st,stm32-spi.yaml with an updated description of the dmas property to reflect the new path of STM32 DMA controllers bindings. - address Rob's remarks about st,stm32-dma3.yaml - address Vinod's remarks about stm32-dma3.c Amelie Delaunay (12): dt-bindings: dma: New directory for STM32 DMA controllers bindings dmaengine: stm32: New directory for STM32 DMA controllers drivers MAINTAINERS: Add entry for STM32 DMA controllers drivers and documentation dt-bindings: dma: Document STM32 DMA3 controller bindings dmaengine: Add STM32 DMA3 support dmaengine: stm32-dma3: add DMA_CYCLIC capability dmaengine: stm32-dma3: add DMA_MEMCPY capability dmaengine: stm32-dma3: add device_pause and device_resume ops dmaengine: stm32-dma3: improve residue granularity dmaengine: add channel device name to channel registration dmaengine: stm32-dma3: defer channel registration to specify channel name arm64: dts: st: add HPDMA nodes on stm32mp251 .../dma/{ => stm32}/st,stm32-dma.yaml | 4 +- .../bindings/dma/stm32/st,stm32-dma3.yaml | 135 ++ .../dma/{ => stm32}/st,stm32-dmamux.yaml | 4 +- .../dma/{ => stm32}/st,stm32-mdma.yaml | 4 +- .../devicetree/bindings/spi/st,stm32-spi.yaml | 2 +- MAINTAINERS | 9 + arch/arm64/boot/dts/st/stm32mp251.dtsi | 69 + drivers/dma/Kconfig | 34 +- drivers/dma/Makefile | 4 +- drivers/dma/dmaengine.c | 16 +- drivers/dma/idxd/dma.c | 2 +- drivers/dma/stm32/Kconfig | 47 + drivers/dma/stm32/Makefile | 5 + drivers/dma/{ => stm32}/stm32-dma.c | 2 +- drivers/dma/stm32/stm32-dma3.c | 1847 +++++++++++++++++ drivers/dma/{ => stm32}/stm32-dmamux.c | 0 drivers/dma/{ => stm32}/stm32-mdma.c | 2 +- include/linux/dmaengine.h | 3 +- 18 files changed, 2137 insertions(+), 52 deletions(-) rename Documentation/devicetree/bindings/dma/{ => stm32}/st,stm32-dma.yaml (97%) create mode 100644 Documentation/devicetree/bindings/dma/stm32/st,stm32-dma3.yaml rename Documentation/devicetree/bindings/dma/{ => stm32}/st,stm32-dmamux.yaml (90%) rename Documentation/devicetree/bindings/dma/{ => stm32}/st,stm32-mdma.yaml (96%) create mode 100644 drivers/dma/stm32/Kconfig create mode 100644 drivers/dma/stm32/Makefile rename drivers/dma/{ => stm32}/stm32-dma.c (99%) create mode 100644 drivers/dma/stm32/stm32-dma3.c rename drivers/dma/{ => stm32}/stm32-dmamux.c (100%) rename drivers/dma/{ => stm32}/stm32-mdma.c (99%)