From patchwork Mon Oct 14 07:54:24 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Green Wan X-Patchwork-Id: 11187969 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7642F1668 for ; Mon, 14 Oct 2019 07:56:32 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 533A121744 for ; Mon, 14 Oct 2019 07:56:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="MWMWu0Yx"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=sifive.com header.i=@sifive.com header.b="k/ju0uxL" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 533A121744 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sifive.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=Caf78Zyjz6RQZek8hKwPZYmZGXmjCHkuITwFLwX0N4M=; b=MWMWu0YxKZnoEKYKBH+kvGCK6t FuYwgYkiQSWetZqmZ59Wz2Wlmfl6WLw2mQ/Q+h0PvPTZToYqJt/+wrz4ZLFtF7p8QQ2praQxLaPac ntndwyEXQXre0oX6a8zRzR7rFNGlBvyrA3WtNGmyAIVxIESHNe5u3mtzQcLTTAg2SAeLy4S2DWsxE QFzAHHDZZQNMHDVd4GnlBQxdzeYWtgilVbE9c1WDis/+ZNSsHiHn401ptCUFhNnv8oFAjOc/cVWXS 1ZvuqncfBSaaLO2LyR1Iphr0eiXcvSDUGgj5WrSdMvl9X3EAst2pAyZTJzA6S50VWOJtfMCojVCxq ZTVxSefQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iJvDT-0000nJ-L0; Mon, 14 Oct 2019 07:56:31 +0000 Received: from mail-pg1-x544.google.com ([2607:f8b0:4864:20::544]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iJvDQ-0000mr-R5 for linux-riscv@lists.infradead.org; Mon, 14 Oct 2019 07:56:30 +0000 Received: by mail-pg1-x544.google.com with SMTP id e10so5623826pgd.11 for ; Mon, 14 Oct 2019 00:56:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=WYgJCjRBqhwY0ulINWDVeN12R2Tn8RH5kuZplnJEZos=; b=k/ju0uxLkLwtL3sDWDJCprGxKz//1GuP8ugQKBBSTurB2DBli1VodHNahR+le8ArUW yYf8lfdY1mdptXyuBBoTgkrfaEffPGxpLi0BdzvZHnf0u1yZ5SJ1aEXgZZk7/O1J4SVa h/TkRNnxxIe+X7ICYeDw457FVI5cTvQTbZiCrqjOKPBIehiaTcYmsz81ukHKMKjlsryz Q5tEOgi42uUAGhrRbuZ/5+pU0Sg1kN5kyM7PZ3IvVW3V55HIpXE+l5D3UMSno9rEmBqf 882ynOY89OgiJ5TXj3ZlPKvpuEa0my6ehw4v7CUPu5YVMN1rmP8XKZlQ5tQVgyr+DwFL zwNA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=WYgJCjRBqhwY0ulINWDVeN12R2Tn8RH5kuZplnJEZos=; b=aZTZDlwQA4sUhQrkvMZ2yJ0lprn3zANHYFxrY6SF9dJvGP7PICD490yMAsA+nJFcXS WXjspUjfDDIn3czgSOMUWxvd+Xe1QVHOWsb3z7k/skUB73y+dgTxQ6DVd2KuUIXEvMb/ pJcKS3IrwhVQqZGUCx+FksQHQqVyOvgBg45+hRrELZWp54OqvmpIsSvUgYOCpesqGJXr qnegQrYbb7aOJVoHBHKtpuErwxzBG6zC3CYK1WdUL8ClEdzFXZ8YuZrKmrPyT4cdjsTF ZnK/VDNjO8V1ZJ28siBHmzXKKS48uW1AyHObkPKY368WLVZ4fRovuUcL0GfOLrKERIh0 AyLQ== X-Gm-Message-State: APjAAAWu/fw0z+1yf4QrVH2qZ6PO3KvhTk2o9vLrN00uj/YaEwFSQ3WK CfKLXhOShMbZL0XhUiiMM1JJjw== X-Google-Smtp-Source: APXvYqz6tFVkfmFOz7LA+7Ptn1VlaJiPkif2QscBsinQM/p+ODS5CXWKT7Oydfmx35z0zZZjIf7slw== X-Received: by 2002:aa7:8a97:: with SMTP id a23mr31494124pfc.76.1571039788241; Mon, 14 Oct 2019 00:56:28 -0700 (PDT) Received: from localhost.localdomain (111-241-168-233.dynamic-ip.hinet.net. [111.241.168.233]) by smtp.gmail.com with ESMTPSA id j126sm16583137pfb.186.2019.10.14.00.56.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Oct 2019 00:56:27 -0700 (PDT) From: Green Wan To: Subject: [RFC v2 1/4] dt-bindings: dmaengine: sf-pdma: add bindins for SiFive PDMA Date: Mon, 14 Oct 2019 15:54:24 +0800 Message-Id: <20191014075502.15105-2-green.wan@sifive.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191014075502.15105-1-green.wan@sifive.com> References: <20191014075502.15105-1-green.wan@sifive.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191014_005628_882064_A871E2E5 X-CRM114-Status: GOOD ( 12.13 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:544 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Albert Ou , Greg Kroah-Hartman , Palmer Dabbelt , Yash Shah , Green Wan , Bin Meng , dmaengine@vger.kernel.org, Vinod Koul , Rob Herring , Sagar Kadam , Jonathan Cameron , Paul Walmsley , Mauro Carvalho Chehab , linux-hackers@sifive.com, Dan Williams , "Paul E. McKenney" , linux-riscv@lists.infradead.org, "David S. Miller" , linux-kernel@vger.kernel.org MIME-Version: 1.0 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org Add DT bindings document for Platform DMA(PDMA) driver of board, HiFive Unleashed Rev A00. Reviewed-by: Rob Herring Reviewed-by: Pragnesh Patel Signed-off-by: Green Wan --- .../bindings/dma/sifive,fu540-c000-pdma.yaml | 55 +++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml diff --git a/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml new file mode 100644 index 000000000000..2ca3ddbe1ff4 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml @@ -0,0 +1,55 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma/sifive,fu540-c000-pdma.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: SiFive Unleashed Rev C000 Platform DMA + +maintainers: + - Green Wan + - Palmer Debbelt + - Paul Walmsley + +description: | + Platform DMA is a DMA engine of SiFive Unleashed. It supports 4 + channels. Each channel has 2 interrupts. One is for DMA done and + the other is for DME error. + + In different SoC, DMA could be attached to different IRQ line. + DT file need to be changed to meet the difference. For technical + doc, + + https://static.dev.sifive.com/FU540-C000-v1.0.pdf + +properties: + compatible: + items: + - const: sifive,fu540-c000-pdma + + reg: + maxItems: 1 + + interrupts: + minItems: 1 + maxItems: 8 + + '#dma-cells': + const: 1 + +required: + - compatible + - reg + - interrupts + - '#dma-cells' + +examples: + - | + dma@3000000 { + compatible = "sifive,fu540-c000-pdma"; + reg = <0x0 0x3000000 0x0 0x8000>; + interrupts = <23 24 25 26 27 28 29 30>; + #dma-cells = <1>; + }; + +... From patchwork Mon Oct 14 07:54:25 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Green Wan X-Patchwork-Id: 11187973 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5DD35139A for ; Mon, 14 Oct 2019 07:57:17 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3A9D321744 for ; Mon, 14 Oct 2019 07:57:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="D06gUfx5"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=sifive.com header.i=@sifive.com header.b="NjqIdIP2" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3A9D321744 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sifive.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=SciYZ/WKlV+O35auAfvLWbx7AMO1R6eNo1IZ/ci2f7k=; b=D06gUfx5b6t479qli5xmJUnzW2 n312cbh14HXa1KRoEtfZvnPodjAD44h3+rD50aiB7Z/mO0ysf6eTyadaR+K30zd2KY8Oxowbguv4K O79FK5TtOsC0U+Y01Ka8O+NQ5akie96eMJGB9w0GymLcrl0/zm9YxJu7Qcs4+EtVg7NAeJy6pyWoq vzOVIDzRl3m4BByDLWFnDtolEFOpl408kVLXjHhPrJgyVhsKvMq2bwqd4zSR4cQjcX/7vKGD3aSKD aBAFbV756OGByEm9difsG0neD1GrGXBEQgXQqCqw5bKe4IdpGSO/AA9msbYTkymgULeo+sOsUlXZZ o4q0K6FA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iJvEC-0001GD-QH; Mon, 14 Oct 2019 07:57:16 +0000 Received: from mail-pf1-x441.google.com ([2607:f8b0:4864:20::441]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iJvEA-0001FT-2Y for linux-riscv@lists.infradead.org; Mon, 14 Oct 2019 07:57:15 +0000 Received: by mail-pf1-x441.google.com with SMTP id b128so9947389pfa.1 for ; Mon, 14 Oct 2019 00:57:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=rTp8veXsbPSlIboKUPW27VEfaouXwybhFA3W6d1O8fo=; b=NjqIdIP2K4hCyynVyDdY8K51dfc2EaIY442YFIaWPHUTu44snyeWUrzK9EM4T1Ham/ 11XeVIHhBGNvCjovYkXZJnz9VxyxOCgOKdJH+/7t/tD579UzhmvY2IhhPIb5kbwOdNnS dxCRzgnXyib7zi0g33B07GAd5bl5b5UIoHvfROTVnem+7JcYQGef7zO8KkE2LtDr+tRV kf3U3oh4cmQhyc7x0rVY7mTZ0SW0iHATCkW+tH0aC1G7aVtoP+QO7nAV6xqEi4dz6acx uzGKSORkBSz7JSrcn1sg+TlvLUh5Pb2UahCesJC20Fxe8npSTEr4g4if7zrlV4UgA3c7 7pow== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=rTp8veXsbPSlIboKUPW27VEfaouXwybhFA3W6d1O8fo=; b=oQAiJwGO4/E5lVetb2tU/KOGW9TYJ4DlnKazQiBBWf8/hW72eLsmLCf/M00CLqk8Uu LnDQCI9VLKE8ueKHm7sLoHqRpnuEu0vClpkzNyxFc5j5G1zdPFcW4Ru6YfkJDpZ2KaRl u0mkW+OtSJ+qgSkWXFDW5oXyKAWNl38CyqbmfNVopoxI93Im8pAVOgYBkvGUVPyafkXw JHgiJFsi7J6NgQiM1CV/nMowe4lhl7ZR2ZpSf0MAzjcEbCpUNr071ZhIIs24ArrEyLX4 Zs0jfmSWrymLi96NQf8K3DUIs1c9kiKNVatJeeTvVGJlmBO5ee8skztIapyM/ZBQtymy BbNw== X-Gm-Message-State: APjAAAWcdVXKsCm9JcLyxtDNvoVMNyH26wh/Vv9LhC4OmuN75EXWfrXn BYw/VdE1DutApBpkCRbv6enkQw== X-Google-Smtp-Source: APXvYqwDsINI3qHxWvKQccDgfNIOC9TpH4ZPSDPxY/U3K0D4h4BQcqb1WCzleq0HYwC2jK/G0rCGNg== X-Received: by 2002:a63:df11:: with SMTP id u17mr19601601pgg.372.1571039833188; Mon, 14 Oct 2019 00:57:13 -0700 (PDT) Received: from localhost.localdomain (111-241-168-233.dynamic-ip.hinet.net. [111.241.168.233]) by smtp.gmail.com with ESMTPSA id j126sm16583137pfb.186.2019.10.14.00.57.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Oct 2019 00:57:12 -0700 (PDT) From: Green Wan To: Subject: [RFC v2 2/4] riscv: dts: add support for PDMA device of HiFive Unleashed Rev A00 Date: Mon, 14 Oct 2019 15:54:25 +0800 Message-Id: <20191014075502.15105-3-green.wan@sifive.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191014075502.15105-1-green.wan@sifive.com> References: <20191014075502.15105-1-green.wan@sifive.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191014_005714_119434_8FA76F52 X-CRM114-Status: UNSURE ( 9.80 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:441 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Albert Ou , Greg Kroah-Hartman , Palmer Dabbelt , Yash Shah , Green Wan , Bin Meng , dmaengine@vger.kernel.org, Vinod Koul , Rob Herring , Sagar Kadam , Jonathan Cameron , Paul Walmsley , Mauro Carvalho Chehab , linux-hackers@sifive.com, Dan Williams , "Paul E. McKenney" , linux-riscv@lists.infradead.org, "David S. Miller" , linux-kernel@vger.kernel.org MIME-Version: 1.0 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org Add PDMA support to (arch/riscv/boot/dts/sifive/fu540-c000.dtsi) Signed-off-by: Green Wan --- arch/riscv/boot/dts/sifive/fu540-c000.dtsi | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/riscv/boot/dts/sifive/fu540-c000.dtsi b/arch/riscv/boot/dts/sifive/fu540-c000.dtsi index afa43c7ea369..70a1891e7cd0 100644 --- a/arch/riscv/boot/dts/sifive/fu540-c000.dtsi +++ b/arch/riscv/boot/dts/sifive/fu540-c000.dtsi @@ -162,6 +162,13 @@ clocks = <&prci PRCI_CLK_TLCLK>; status = "disabled"; }; + dma: dma@3000000 { + compatible = "sifive,fu540-c000-pdma"; + reg = <0x0 0x3000000 0x0 0x8000>; + interrupt-parent = <&plic0>; + interrupts = <23 24 25 26 27 28 29 30>; + #dma-cells = <1>; + }; uart1: serial@10011000 { compatible = "sifive,fu540-c000-uart", "sifive,uart0"; reg = <0x0 0x10011000 0x0 0x1000>; From patchwork Mon Oct 14 07:54:26 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Green Wan X-Patchwork-Id: 11187977 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6B6B9139A for ; Mon, 14 Oct 2019 07:58:04 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 45D3020673 for ; Mon, 14 Oct 2019 07:58:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="dtbzLT3v"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=sifive.com header.i=@sifive.com header.b="UodseW2M" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 45D3020673 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sifive.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=gvdofW/VlU1Oq4OfB1NUz9NSHeMCPqz5GVO6aK5Ospg=; b=dtbzLT3vHVghIwzou+/cEE3KRo 1sHpQv9PweRrd9/LNC0a63mmctlqoEdDPNcR2fAloWtVtVo/uR+MiXHYYSSAckTzC5U2hYAjkVxJZ lhpJtSNFYLM2gNo6nvcTKB6fmer/aunLI0Fh8gDAqtVu7/plS43+GR2bT8fdWNVb9FUAEaWWvmMF9 LlGbCVaj5fwtwIpS1/xerdPlE/gcRtTq8Cjoml+RnBZZkEP3Z9Q3DzhyoJABTQy9pFE2goJzx/Dz3 qqCKOUk4SHG88qvnJlbw5mAkoLVyu64a4nXVHSmSqJUBRL10uDIAliIZQytGHVyhK+dhlLLEHBuk9 4Z3BqFpQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iJvEx-0001Mc-QV; Mon, 14 Oct 2019 07:58:03 +0000 Received: from mail-pg1-x542.google.com ([2607:f8b0:4864:20::542]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iJvEt-0001Lw-WC for linux-riscv@lists.infradead.org; Mon, 14 Oct 2019 07:58:02 +0000 Received: by mail-pg1-x542.google.com with SMTP id k20so2265503pgi.1 for ; Mon, 14 Oct 2019 00:57:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=/5BPiLm9jTo6AM4XRjKUnAXYFSCOe9t2fmLLH41i100=; b=UodseW2MF/XaACeyfTVSrNa8OPKRm8fQ0Yy2LTLKNxbq1gxW4o0ID3jKlIM8BiJK8p FIlMS0/Ma1mmhn8nuKIvUQqWKhHis0MHXjXBwH0AClZz2vz7dCq7Xxa7SAoOZU1fkpzy y2KNKncw3rbGmHj1d0OY95ZPsF8plKKLO+pLkuKEQhauTrSvvcvU2hOY1DAzvdUxXw9a hQ7CYUAoWA481aDaSgmKPIVpvpCHKgBphmyaQVLUMncd5A0vhbLRzH5AR35jqK8clZXh B37dQ2P6hhY2zGaiukRL9YtS6NqPBkReARItrHOQpB9l6i6/SE6ekhSkEmoPBX8eev6c MsuA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=/5BPiLm9jTo6AM4XRjKUnAXYFSCOe9t2fmLLH41i100=; b=WdBlvnTU/IFoGyk1Jvl2pn4MNngS7iia5jYq2NHdkfbLL0+3lr2LKg24Nyprvi/gjZ okzvKV4g5NVbY6sfVtjBH6cnEWNj8bnRwxGJk30uCTb6rnu+GsmlQykCgGh4ruZAGuqD ezKYM3flSoFiLvGr5sn+bKQF+Tboa3DBJiZYwRProqihupiZ/aE2R+pW4soKZoPC6O4w iFaSLrXPxV5FeniKA32lRKew9NNnoNCXDLMYZULywA63gTMQ3SMaBRXWLs7dVByG5Gbc 9ryktffPIfIfQL2iAeiAkvqsorHLPYnggnJXCweozfxb9MQHKjYcop0gbcyuHYbpxRqV HhDA== X-Gm-Message-State: APjAAAUxjen03hDCfSI4JTqqapbcYDrNubgGhvQe6kw4L2PYfVCfdRTa HG7y6pC0jYR4Y4LtOw8Q6H5EsA== X-Google-Smtp-Source: APXvYqwMVN4pZ/TYZfUIaLKOiA2wsTn8oajpy6dChNqjBDHsm9Yf8NWWQdaDzCg/yFL/egjCYg3/aA== X-Received: by 2002:a17:90a:17c4:: with SMTP id q62mr9383715pja.83.1571039878599; Mon, 14 Oct 2019 00:57:58 -0700 (PDT) Received: from localhost.localdomain (111-241-168-233.dynamic-ip.hinet.net. [111.241.168.233]) by smtp.gmail.com with ESMTPSA id j126sm16583137pfb.186.2019.10.14.00.57.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Oct 2019 00:57:58 -0700 (PDT) From: Green Wan To: Subject: [RFC v2 3/4] dmaengine: sf-pdma: add platform DMA support for HiFive Unleashed A00 Date: Mon, 14 Oct 2019 15:54:26 +0800 Message-Id: <20191014075502.15105-4-green.wan@sifive.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191014075502.15105-1-green.wan@sifive.com> References: <20191014075502.15105-1-green.wan@sifive.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191014_005800_039354_EE3D38B7 X-CRM114-Status: GOOD ( 18.32 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:542 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Palmer Dabbelt , Sagar Kadam , Mauro Carvalho Chehab , linux-riscv@lists.infradead.org, "Paul E. McKenney" , kbuild test robot , Vinod Koul , linux-hackers@sifive.com, devicetree@vger.kernel.org, Albert Ou , Green Wan , Rob Herring , Paul Walmsley , Jonathan Cameron , Dan Williams , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, Yash Shah , dmaengine@vger.kernel.org, Bin Meng , "David S. Miller" MIME-Version: 1.0 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org Add PDMA driver, sf-pdma, to enable DMA engine on HiFive Unleashed Rev A00 board. - Implement dmaengine APIs, support MEM_TO_MEM async copy. - Tested by DMA Test client - Supports 4 channels DMA, each channel has 1 done and 1 err interrupt connected to platform-level interrupt controller (PLIC). - Depends on DMA_ENGINE and DMA_VIRTUAL_CHANNELS The datasheet is here: https://static.dev.sifive.com/FU540-C000-v1.0.pdf Follow the DMAengine controller doc, "./Documentation/driver-api/dmaengine/provider.rst" to implement DMA engine. And use the dma test client in doc, "./Documentation/driver-api/dmaengine/dmatest.rst", to test. Each DMA channel has separate HW regs and support done and error ISRs. 4 channels share 1 done and 1 err ISRs. There's no expander/arbitrator in DMA HW. ------ ------ | |--< done 23 >--|ch 0| | |--< err 24 >--| | (dma0chan0) | | ------ | | ------ | |--< done 25 >--|ch 1| | |--< err 26 >--| | (dma0chan1) |PLIC| ------ | | ------ | |--< done 27 >--|ch 2| | |--< err 28 >--| | (dma0chan2) | | ------ | | ------ | |--< done 29 >--|ch 3| | |--< err 30 >--| | (dma0chan3) ------ ------ Reviewed-by: Vinod Koul Signed-off-by: Green Wan Reported-by: kbuild test robot Fixes: 31c3b98b5a01 ("dmaengine: sf-pdma: add platform DMA support for HiFive Unleashed A00") Signed-off-by: kbuild test robot --- drivers/dma/Kconfig | 2 + drivers/dma/Makefile | 1 + drivers/dma/sf-pdma/Kconfig | 6 + drivers/dma/sf-pdma/Makefile | 1 + drivers/dma/sf-pdma/sf-pdma.c | 601 ++++++++++++++++++++++++++++++++++ drivers/dma/sf-pdma/sf-pdma.h | 124 +++++++ 6 files changed, 735 insertions(+) create mode 100644 drivers/dma/sf-pdma/Kconfig create mode 100644 drivers/dma/sf-pdma/Makefile create mode 100644 drivers/dma/sf-pdma/sf-pdma.c create mode 100644 drivers/dma/sf-pdma/sf-pdma.h diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index 7af874b69ffb..03dc82094857 100644 --- a/drivers/dma/Kconfig +++ b/drivers/dma/Kconfig @@ -661,6 +661,8 @@ source "drivers/dma/qcom/Kconfig" source "drivers/dma/dw/Kconfig" +source "drivers/dma/sf-pdma/Kconfig" + source "drivers/dma/dw-edma/Kconfig" source "drivers/dma/hsu/Kconfig" diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile index f5ce8665e944..4bbd90563ede 100644 --- a/drivers/dma/Makefile +++ b/drivers/dma/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_DMA_SUN4I) += sun4i-dma.o obj-$(CONFIG_DMA_SUN6I) += sun6i-dma.o obj-$(CONFIG_DW_AXI_DMAC) += dw-axi-dmac/ obj-$(CONFIG_DW_DMAC_CORE) += dw/ +obj-$(CONFIG_SF_PDMA) += sf-pdma/ obj-$(CONFIG_DW_EDMA) += dw-edma/ obj-$(CONFIG_EP93XX_DMA) += ep93xx_dma.o obj-$(CONFIG_FSL_DMA) += fsldma.o diff --git a/drivers/dma/sf-pdma/Kconfig b/drivers/dma/sf-pdma/Kconfig new file mode 100644 index 000000000000..0e01a5728a79 --- /dev/null +++ b/drivers/dma/sf-pdma/Kconfig @@ -0,0 +1,6 @@ +config SF_PDMA + bool "Sifive PDMA controller driver" + select DMA_ENGINE + select DMA_VIRTUAL_CHANNELS + help + Support the SiFive PDMA controller. diff --git a/drivers/dma/sf-pdma/Makefile b/drivers/dma/sf-pdma/Makefile new file mode 100644 index 000000000000..764552ab8d0a --- /dev/null +++ b/drivers/dma/sf-pdma/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_SF_PDMA) += sf-pdma.o diff --git a/drivers/dma/sf-pdma/sf-pdma.c b/drivers/dma/sf-pdma/sf-pdma.c new file mode 100644 index 000000000000..973ed9d8cfa4 --- /dev/null +++ b/drivers/dma/sf-pdma/sf-pdma.c @@ -0,0 +1,601 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** + * SiFive FU540 Platform DMA driver + * Copyright (C) 2019 SiFive + * + * Based partially on: + * - drivers/dma/fsl-edma.c + * - drivers/dma/dw-edma/ + * - drivers/dma/pxa-dma.c + * + * See the following sources for further documentation: + * - Chapter 12 "Platform DMA Engine (PDMA)" of + * SiFive FU540-C000 v1.0 + * https://static.dev.sifive.com/FU540-C000-v1.0.pdf + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "sf-pdma.h" +#include "../dmaengine.h" +#include "../virt-dma.h" + +#define SIFIVE_PDMA_NAME "sf-pdma" + +#ifndef readq +static inline unsigned long long readq(void __iomem *addr) +{ + return readl(addr) | (((unsigned long long)readl(addr + 4)) << 32LL); +} +#endif + +#ifndef writeq +static inline void writeq(unsigned long long v, void __iomem *addr) +{ + writel(v & 0xffffffff, addr); + writel(v >> 32, addr + 4); +} +#endif + +static inline struct sf_pdma_chan *to_sf_pdma_chan(struct dma_chan *dchan) +{ + return container_of(dchan, struct sf_pdma_chan, vchan.chan); +} + +static inline struct sf_pdma_desc *to_sf_pdma_desc(struct virt_dma_desc *vd) +{ + return container_of(vd, struct sf_pdma_desc, vdesc); +} + +static struct sf_pdma_desc *sf_pdma_alloc_desc(struct sf_pdma_chan *chan) +{ + struct sf_pdma_desc *desc; + unsigned long flags; + + spin_lock_irqsave(&chan->lock, flags); + + if (chan->desc && !chan->desc->in_use) { + spin_unlock_irqrestore(&chan->lock, flags); + return chan->desc; + } + + spin_unlock_irqrestore(&chan->lock, flags); + + desc = kzalloc(sizeof(*desc), GFP_NOWAIT); + + if (!desc) + return NULL; + + desc->chan = chan; + + return desc; +} + +static void sf_pdma_fill_desc(struct sf_pdma_chan *chan, + u64 dst, + u64 src, + u64 size) +{ + struct pdma_regs *regs = &chan->regs; + + writel(PDMA_FULL_SPEED, regs->xfer_type); + writeq(size, regs->xfer_size); + writeq(dst, regs->dst_addr); + writeq(src, regs->src_addr); +} + +static void sf_pdma_disclaim_chan(struct sf_pdma_chan *chan) +{ + struct pdma_regs *regs = &chan->regs; + + writel(PDMA_CLEAR_CTRL, regs->ctrl); +} + +static struct dma_async_tx_descriptor * + sf_pdma_prep_dma_memcpy(struct dma_chan *dchan, + dma_addr_t dest, + dma_addr_t src, + size_t len, + unsigned long flags) +{ + struct sf_pdma_chan *chan = to_sf_pdma_chan(dchan); + struct sf_pdma_desc *desc; + + if (!chan || !len || !dest || !src) { + pr_debug("%s: Please check dma len, dest, src!\n", __func__); + return NULL; + } + + desc = sf_pdma_alloc_desc(chan); + if (!desc) + return NULL; + + desc->in_use = true; + desc->dirn = DMA_MEM_TO_MEM; + desc->async_tx = vchan_tx_prep(&chan->vchan, &desc->vdesc, flags); + + spin_lock_irqsave(&chan->lock, flags); + chan->desc = desc; + sf_pdma_fill_desc(desc->chan, dest, src, len); + spin_unlock_irqrestore(&chan->lock, flags); + + return desc->async_tx; +} + +static void sf_pdma_unprep_slave_dma(struct sf_pdma_chan *chan) +{ + if (chan->dma_dir != DMA_NONE) + dma_unmap_resource(chan->vchan.chan.device->dev, + chan->dma_dev_addr, + chan->dma_dev_size, + chan->dma_dir, 0); + chan->dma_dir = DMA_NONE; +} + +static int sf_pdma_slave_config(struct dma_chan *dchan, + struct dma_slave_config *cfg) +{ + struct sf_pdma_chan *chan = to_sf_pdma_chan(dchan); + + memcpy(&chan->cfg, cfg, sizeof(*cfg)); + sf_pdma_unprep_slave_dma(chan); + + return 0; +} + +static int sf_pdma_alloc_chan_resources(struct dma_chan *dchan) +{ + struct sf_pdma_chan *chan = to_sf_pdma_chan(dchan); + struct pdma_regs *regs = &chan->regs; + + dma_cookie_init(dchan); + writel(PDMA_CLAIM_MASK, regs->ctrl); + + return 0; +} + +static void sf_pdma_disable_request(struct sf_pdma_chan *chan) +{ + struct pdma_regs *regs = &chan->regs; + + writel(readl(regs->ctrl) & ~PDMA_RUN_MASK, regs->ctrl); +} + +static void sf_pdma_free_chan_resources(struct dma_chan *dchan) +{ + struct sf_pdma_chan *chan = to_sf_pdma_chan(dchan); + unsigned long flags; + LIST_HEAD(head); + + spin_lock_irqsave(&chan->vchan.lock, flags); + sf_pdma_disable_request(chan); + kfree(chan->desc); + chan->desc = NULL; + vchan_get_all_descriptors(&chan->vchan, &head); + sf_pdma_unprep_slave_dma(chan); + vchan_dma_desc_free_list(&chan->vchan, &head); + sf_pdma_disclaim_chan(chan); + spin_unlock_irqrestore(&chan->vchan.lock, flags); +} + +static size_t sf_pdma_desc_residue(struct sf_pdma_chan *chan) +{ + struct pdma_regs *regs = &chan->regs; + u64 residue; + + residue = readq(regs->residue); + + return residue; +} + +static enum dma_status +sf_pdma_tx_status(struct dma_chan *dchan, + dma_cookie_t cookie, + struct dma_tx_state *txstate) +{ + struct sf_pdma_chan *chan = to_sf_pdma_chan(dchan); + enum dma_status status; + unsigned long flags; + + spin_lock_irqsave(&chan->lock, flags); + if (chan->xfer_err) { + chan->status = DMA_ERROR; + spin_unlock_irqrestore(&chan->lock, flags); + return chan->status; + } + + spin_unlock_irqrestore(&chan->lock, flags); + + status = dma_cookie_status(dchan, cookie, txstate); + + if (txstate && status != DMA_ERROR) + dma_set_residue(txstate, sf_pdma_desc_residue(chan)); + + return status; +} + +static int sf_pdma_terminate_all(struct dma_chan *dchan) +{ + struct sf_pdma_chan *chan = to_sf_pdma_chan(dchan); + unsigned long flags; + LIST_HEAD(head); + + spin_lock_irqsave(&chan->vchan.lock, flags); + sf_pdma_disable_request(chan); + kfree(chan->desc); + chan->desc = NULL; + chan->xfer_err = false; + vchan_get_all_descriptors(&chan->vchan, &head); + vchan_dma_desc_free_list(&chan->vchan, &head); + spin_unlock_irqrestore(&chan->vchan.lock, flags); + + return 0; +} + +static void sf_pdma_enable_request(struct sf_pdma_chan *chan) +{ + struct pdma_regs *regs = &chan->regs; + u32 v; + + v = PDMA_CLAIM_MASK | + PDMA_ENABLE_DONE_INT_MASK | + PDMA_ENABLE_ERR_INT_MASK | + PDMA_RUN_MASK; + + writel(v, regs->ctrl); +} + +static void sf_pdma_xfer_desc(struct sf_pdma_chan *chan) +{ + struct virt_dma_desc *vdesc; + + vdesc = vchan_next_desc(&chan->vchan); + if (!vdesc) + return; + + chan->desc = to_sf_pdma_desc(vdesc); + chan->status = DMA_IN_PROGRESS; +} + +static void sf_pdma_issue_pending(struct dma_chan *dchan) +{ + struct sf_pdma_chan *chan = to_sf_pdma_chan(dchan); + unsigned long flags; + + spin_lock_irqsave(&chan->vchan.lock, flags); + + if (chan->pm_state != RUNNING) { + spin_unlock_irqrestore(&chan->vchan.lock, flags); + /* cannot submit due to suspend */ + return; + } + + if (vchan_issue_pending(&chan->vchan) && !chan->desc) + sf_pdma_xfer_desc(chan); + + sf_pdma_enable_request(chan); + spin_unlock_irqrestore(&chan->vchan.lock, flags); +} + +static void sf_pdma_free_desc(struct virt_dma_desc *vdesc) +{ + struct sf_pdma_desc *desc; + + desc = to_sf_pdma_desc(vdesc); + desc->in_use = false; +} + +static void sf_pdma_donebh_tasklet(unsigned long arg) +{ + struct sf_pdma_chan *chan = (struct sf_pdma_chan *)arg; + struct sf_pdma_desc *desc = chan->desc; + unsigned long flags; + + spin_lock_irqsave(&chan->vchan.lock, flags); + list_del(&chan->desc->vdesc.node); + vchan_cookie_complete(&chan->desc->vdesc); + spin_unlock_irqrestore(&chan->vchan.lock, flags); + + spin_lock_irqsave(&chan->lock, flags); + if (chan->xfer_err) { + chan->retries = MAX_RETRY; + chan->status = DMA_COMPLETE; + chan->xfer_err = false; + } + spin_unlock_irqrestore(&chan->lock, flags); + + dmaengine_desc_get_callback_invoke(desc->async_tx, NULL); +} + +static void sf_pdma_errbh_tasklet(unsigned long arg) +{ + struct sf_pdma_chan *chan = (struct sf_pdma_chan *)arg; + struct sf_pdma_desc *desc = chan->desc; + unsigned long flags; + + spin_lock_irqsave(&chan->lock, flags); + if (chan->retries <= 0) { + /* fail to recover, tx_status() is in DMA_ERROR */ + spin_unlock_irqrestore(&chan->lock, flags); + dmaengine_desc_get_callback_invoke(desc->async_tx, NULL); + } else { + /* retry */ + chan->retries--; + chan->xfer_err = true; + chan->status = DMA_ERROR; + + sf_pdma_enable_request(chan); + spin_unlock_irqrestore(&chan->lock, flags); + } +} + +static irqreturn_t sf_pdma_done_isr(int irq, void *dev_id) +{ + struct sf_pdma_chan *chan = dev_id; + struct pdma_regs *regs = &chan->regs; + unsigned long flags; + + spin_lock_irqsave(&chan->lock, flags); + writel((readl(regs->ctrl)) & ~PDMA_DONE_STATUS_MASK, regs->ctrl); + spin_unlock_irqrestore(&chan->lock, flags); + + tasklet_hi_schedule(&chan->done_tasklet); + + return IRQ_HANDLED; +} + +static irqreturn_t sf_pdma_err_isr(int irq, void *dev_id) +{ + struct sf_pdma_chan *chan = dev_id; + struct pdma_regs *regs = &chan->regs; + unsigned long flags; + + spin_lock_irqsave(&chan->lock, flags); + writel((readl(regs->ctrl)) & ~PDMA_ERR_STATUS_MASK, regs->ctrl); + spin_unlock_irqrestore(&chan->lock, flags); + + tasklet_schedule(&chan->err_tasklet); + + return IRQ_HANDLED; +} + +/** + * sf_pdma_irq_init() - Init PDMA IRQ Handlers + * @pdev: pointer of platform_device + * @pdma: pointer of PDMA engine. Caller should check NULL + * + * Initialize DONE and ERROR interrupt handler for 4 channels. Caller should + * make sure the pointer passed in are non-NULL. This function should be called + * only one time during the device probe. + * + * Context: Any context. + * + * Return: + * * 0 - OK to init all IRQ handlers + * * irq - Fail to retrieve from DT binding + * * -1 - Fail to call request_irq() + */ +static int sf_pdma_irq_init(struct platform_device *pdev, struct sf_pdma *pdma) +{ + int irq, r, i; + struct sf_pdma_chan *chan; + + for (i = 0; i < pdma->n_chans; i++) { + chan = &pdma->chans[i]; + + irq = platform_get_irq(pdev, i * 2); + if (irq < 0) { + dev_err(&pdev->dev, "Can't get pdma done irq.\n"); + return irq; + } + + r = devm_request_irq(&pdev->dev, irq, sf_pdma_done_isr, 0, + dev_name(&pdev->dev), (void *)chan); + if (r) { + dev_err(&pdev->dev, "Fail to attach done ISR: %d\n", r); + return -1; + } + + chan->txirq = irq; + + irq = platform_get_irq(pdev, (i * 2) + 1); + if (irq < 0) { + dev_err(&pdev->dev, "Can't get pdma err irq.\n"); + return irq; + } + + r = devm_request_irq(&pdev->dev, irq, sf_pdma_err_isr, 0, + dev_name(&pdev->dev), (void *)chan); + if (r) { + dev_err(&pdev->dev, "Fail to attach err ISR: %d\n", r); + return -1; + } + + chan->errirq = irq; + } + + return 0; +} + +/** + * sf_pdma_setup_chans() - Init settings of each channel + * @pdma: pointer of PDMA engine. Caller should check NULL + * + * Initialize all data structure and register base. Caller should make sure + * the pointer passed in are non-NULL. This function should be called only + * one time during the device probe. + * + * Context: Any context. + * + * Return: none + */ +#define SF_PDMA_REG_BASE(ch) (pdma->membase + (PDMA_CHAN_OFFSET * (ch))) +static void sf_pdma_setup_chans(struct sf_pdma *pdma) +{ + int i; + struct sf_pdma_chan *chan; + + INIT_LIST_HEAD(&pdma->dma_dev.channels); + + for (i = 0; i < pdma->n_chans; i++) { + chan = &pdma->chans[i]; + + chan->regs.ctrl = + SF_PDMA_REG_BASE(i) + PDMA_CTRL; + chan->regs.xfer_type = + SF_PDMA_REG_BASE(i) + PDMA_XFER_TYPE; + chan->regs.xfer_size = + SF_PDMA_REG_BASE(i) + PDMA_XFER_SIZE; + chan->regs.dst_addr = + SF_PDMA_REG_BASE(i) + PDMA_DST_ADDR; + chan->regs.src_addr = + SF_PDMA_REG_BASE(i) + PDMA_SRC_ADDR; + chan->regs.act_type = + SF_PDMA_REG_BASE(i) + PDMA_ACT_TYPE; + chan->regs.residue = + SF_PDMA_REG_BASE(i) + PDMA_REMAINING_BYTE; + chan->regs.cur_dst_addr = + SF_PDMA_REG_BASE(i) + PDMA_CUR_DST_ADDR; + chan->regs.cur_src_addr = + SF_PDMA_REG_BASE(i) + PDMA_CUR_SRC_ADDR; + + chan->pdma = pdma; + chan->pm_state = RUNNING; + chan->slave_id = i; + chan->xfer_err = false; + spin_lock_init(&chan->lock); + + chan->vchan.desc_free = sf_pdma_free_desc; + vchan_init(&chan->vchan, &pdma->dma_dev); + + writel(PDMA_CLEAR_CTRL, chan->regs.ctrl); + + tasklet_init(&chan->done_tasklet, + sf_pdma_donebh_tasklet, (unsigned long)chan); + tasklet_init(&chan->err_tasklet, + sf_pdma_errbh_tasklet, (unsigned long)chan); + } +} + +static int sf_pdma_probe(struct platform_device *pdev) +{ + struct sf_pdma *pdma; + struct sf_pdma_chan *chan; + struct resource *res; + int len, chans; + int ret; + + chans = PDMA_NR_CH; + len = sizeof(*pdma) + sizeof(*chan) * chans; + pdma = devm_kzalloc(&pdev->dev, len, GFP_KERNEL); + if (!pdma) + return -ENOMEM; + + pdma->n_chans = chans; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + pdma->membase = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(pdma->membase)) + goto ERR_MEMBASE; + + ret = sf_pdma_irq_init(pdev, pdma); + if (ret) + goto ERR_INITIRQ; + + sf_pdma_setup_chans(pdma); + + pdma->dma_dev.dev = &pdev->dev; + dma_cap_set(DMA_MEMCPY, pdma->dma_dev.cap_mask); + + ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); + if (ret) + pr_warn("*** Failed to set DMA mask. Fall back to default.\n"); + + /* Setup DMA APIs */ + pdma->dma_dev.device_alloc_chan_resources = + sf_pdma_alloc_chan_resources; + pdma->dma_dev.device_free_chan_resources = + sf_pdma_free_chan_resources; + pdma->dma_dev.device_tx_status = sf_pdma_tx_status; + pdma->dma_dev.device_prep_dma_memcpy = sf_pdma_prep_dma_memcpy; + pdma->dma_dev.device_config = sf_pdma_slave_config; + pdma->dma_dev.device_terminate_all = sf_pdma_terminate_all; + pdma->dma_dev.device_issue_pending = sf_pdma_issue_pending; + + platform_set_drvdata(pdev, pdma); + + ret = dma_async_device_register(&pdma->dma_dev); + if (ret) + goto ERR_REG_DMADEVICE; + + return 0; + +ERR_MEMBASE: + devm_kfree(&pdev->dev, pdma); + return PTR_ERR(pdma->membase); + +ERR_INITIRQ: + devm_kfree(&pdev->dev, pdma); + return ret; + +ERR_REG_DMADEVICE: + devm_kfree(&pdev->dev, pdma); + dev_err(&pdev->dev, + "Can't register SiFive Platform DMA. (%d)\n", ret); + return ret; +} + +static int sf_pdma_remove(struct platform_device *pdev) +{ + struct sf_pdma *pdma = platform_get_drvdata(pdev); + + dma_async_device_unregister(&pdma->dma_dev); + + return 0; +} + +static const struct of_device_id sf_pdma_of_match[] = { + { .compatible = "sifive,fu540-c000-pdma" }, + {}, +}; +MODULE_DEVICE_TABLE(of, sifive_serial_of_match); + +static struct platform_driver sf_pdma_driver = { + .probe = sf_pdma_probe, + .remove = sf_pdma_remove, + .driver = { + .name = SIFIVE_PDMA_NAME, + .of_match_table = of_match_ptr(sf_pdma_of_match), + }, +}; + +static int __init sf_pdma_init(void) +{ + return platform_driver_register(&sf_pdma_driver); +} + +static void __exit sf_pdma_exit(void) +{ + platform_driver_unregister(&sf_pdma_driver); +} + +/* do early init */ +subsys_initcall(sf_pdma_init); +module_exit(sf_pdma_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("SiFive Platform DMA driver"); +MODULE_AUTHOR("Green Wan "); diff --git a/drivers/dma/sf-pdma/sf-pdma.h b/drivers/dma/sf-pdma/sf-pdma.h new file mode 100644 index 000000000000..d577d5af0bf4 --- /dev/null +++ b/drivers/dma/sf-pdma/sf-pdma.h @@ -0,0 +1,124 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/** + * SiFive FU540 Platform DMA driver + * Copyright (C) 2019 SiFive + * + * Based partially on: + * - drivers/dma/fsl-edma.c + * - drivers/dma/dw-edma/ + * - drivers/dma/pxa-dma.c + * + * See the following sources for further documentation: + * - Chapter 12 "Platform DMA Engine (PDMA)" of + * SiFive FU540-C000 v1.0 + * https://static.dev.sifive.com/FU540-C000-v1.0.pdf + */ +#ifndef _SF_PDMA_H +#define _SF_PDMA_H + +#include +#include +#include +#include +#include +#include +#include + +#include "../dmaengine.h" +#include "../virt-dma.h" + +#define PDMA_NR_CH 4 + +#if (PDMA_NR_CH != 4) +#error "Please define PDMA_NR_CH to 4" +#endif + +#define PDMA_BASE_ADDR 0x3000000 +#define PDMA_CHAN_OFFSET 0x1000 + +/* Register Offset */ +#define PDMA_CTRL 0x000 +#define PDMA_XFER_TYPE 0x004 +#define PDMA_XFER_SIZE 0x008 +#define PDMA_DST_ADDR 0x010 +#define PDMA_SRC_ADDR 0x018 +#define PDMA_ACT_TYPE 0x104 /* Read-only */ +#define PDMA_REMAINING_BYTE 0x108 /* Read-only */ +#define PDMA_CUR_DST_ADDR 0x110 /* Read-only*/ +#define PDMA_CUR_SRC_ADDR 0x118 /* Read-only*/ + +/* CTRL */ +#define PDMA_CLEAR_CTRL 0x0 +#define PDMA_CLAIM_MASK GENMASK(0, 0) +#define PDMA_RUN_MASK GENMASK(1, 1) +#define PDMA_ENABLE_DONE_INT_MASK GENMASK(14, 14) +#define PDMA_ENABLE_ERR_INT_MASK GENMASK(15, 15) +#define PDMA_DONE_STATUS_MASK GENMASK(30, 30) +#define PDMA_ERR_STATUS_MASK GENMASK(31, 31) + +/* Transfer Type */ +#define PDMA_FULL_SPEED 0xFF000008 + +/* Error Recovery */ +#define MAX_RETRY 1 + +struct pdma_regs { + /* read-write regs */ + void __iomem *ctrl; /* 4 bytes */ + + void __iomem *xfer_type; /* 4 bytes */ + void __iomem *xfer_size; /* 8 bytes */ + void __iomem *dst_addr; /* 8 bytes */ + void __iomem *src_addr; /* 8 bytes */ + + /* read-only */ + void __iomem *act_type; /* 4 bytes */ + void __iomem *residue; /* 8 bytes */ + void __iomem *cur_dst_addr; /* 8 bytes */ + void __iomem *cur_src_addr; /* 8 bytes */ +}; + +struct sf_pdma_desc { + struct virt_dma_desc vdesc; + struct sf_pdma_chan *chan; + bool in_use; + enum dma_transfer_direction dirn; + struct dma_async_tx_descriptor *async_tx; +}; + +enum sf_pdma_pm_state { + RUNNING = 0, + SUSPENDED, +}; + +struct sf_pdma_chan { + struct virt_dma_chan vchan; + enum dma_status status; + enum sf_pdma_pm_state pm_state; + u32 slave_id; + struct sf_pdma *pdma; + struct sf_pdma_desc *desc; + struct dma_slave_config cfg; + u32 attr; + dma_addr_t dma_dev_addr; + u32 dma_dev_size; + enum dma_data_direction dma_dir; + struct tasklet_struct done_tasklet; + struct tasklet_struct err_tasklet; + struct pdma_regs regs; + spinlock_t lock; /* protect chan data */ + bool xfer_err; + int txirq; + int errirq; + int retries; +}; + +struct sf_pdma { + struct dma_device dma_dev; + void __iomem *membase; + void __iomem *mappedbase; + u32 n_chans; + struct sf_pdma_chan chans[PDMA_NR_CH]; +}; + +#endif /* _SF_PDMA_H */ From patchwork Mon Oct 14 07:54:27 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Green Wan X-Patchwork-Id: 11188009 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 20C1A139A for ; Mon, 14 Oct 2019 08:00:13 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DB0A020673 for ; Mon, 14 Oct 2019 08:00:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="XucNhaCB"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=sifive.com header.i=@sifive.com header.b="dIkMInmT" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DB0A020673 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sifive.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=+sXp2aN83h8JG/ZnxidwPc7p/28oDqXY0VLU3sQ0/Qw=; b=XucNhaCBfSnjlYcm4DmtuVVMgJ KgJTXUL7T7alqeoPZswQzbVCo0/HRB+15gZpH1f+FSZuvKQdVZ70MIhfNxeMkmF5gyxncXD6KGXE7 4+oSPuJNt81dKH1/BvZMP2CX3/BJskasMdkRpMePm8lBNBuvdYPzuRn01kz4c6wTe6YsiF10PYj/K wXi5+qRHIlsRIwPrF1zMasFHnDuriE2UWevA6AZB7RH6iuhYnS8k20q+h2YRMwWoVBFl/PMTi1OTD 3vJAMI1VwOPf03a+bl9okWptdY9WWEvwm665FNkwAIFtjNtlH1OIgQUmjk/PJP1r7i/k+FO41ixgQ R2ZD65GA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iJvH1-0003tr-KS; Mon, 14 Oct 2019 08:00:11 +0000 Received: from mail-pg1-x533.google.com ([2607:f8b0:4864:20::533]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iJvFe-0001i3-0s for linux-riscv@lists.infradead.org; Mon, 14 Oct 2019 07:58:47 +0000 Received: by mail-pg1-x533.google.com with SMTP id 23so9629570pgk.3 for ; Mon, 14 Oct 2019 00:58:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=y50RYUfHeI2he8tBZWuhHfSekRhLtbksYVRqOP2O+os=; b=dIkMInmTpj1JrGLM5HMmR344M6bRmXAeYAMiVi8arb1/TJiPi/qUU0epeb2VIbDM4G LV3tlygKC4jC/jZvI/TTi1aSMecsChNYTb6670nu93b6lUDkYL20QDgOWQLg7FTCeez4 X8Zy9epQLServXDvDch8Pk3PiKVzYr6g96SSq+yK5zc5ImZYUoncGr9E/hXE1UiCYKiB +eJ5zOPomeSEH68qwDViDJScGl1/s35QWBNtfxK/BCDsB8akxoVVse1MfiXLl/gWOB57 IqRHEKdJM1AE9swDJi3rcCokwXduEo8RYy7FP6TrgWhL62naqVU5cXxMuEEmSgXFMq9V rl3Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=y50RYUfHeI2he8tBZWuhHfSekRhLtbksYVRqOP2O+os=; b=qQligrWxFSVacUBVJQ4KAQbXVZxZm4Y9dSrxixCqQMaVeD2+vj0n7ppx87xuLz7BCa 9y5CHxsrKf7zjDz8HD++OVzR04jOe4YqVAoD3pwVJFz67LLBxk6sU1S0IHZRt1xIl4S6 inJwTDAJ8kzd9clshIivDWwt+phAVAN4uGcqjgkg1yGh3hZAiF5J+s1caF9f07mXFIEO WgLqhCnZdQYKl2EQyA1u1NHgEA3pei6xv845xEpnruBGXNfWm2ziwt74Ekk+JapsS1Dd ZalOM66R3CZ+F/ysetJphpw6D+7CExk1XMT8h4lHpO5qD1ZHTzrWK1RUrZwPUhVbvr+J 1SOg== X-Gm-Message-State: APjAAAVI82TbH4GPojs6iDbcCvuRRhNGzS8dpONg5UJw6RGofRVCPg9o D6kndJndkqc4UTAmwjvk/qKrLw== X-Google-Smtp-Source: APXvYqz1elBbSRERXVRjYUz8rt7tmJgHaye/RY5uPh+nlyfBFC3t6Ntdv7LmkGs0yOyrkFPOBQvtXg== X-Received: by 2002:a62:3685:: with SMTP id d127mr159897pfa.179.1571039924723; Mon, 14 Oct 2019 00:58:44 -0700 (PDT) Received: from localhost.localdomain (111-241-168-233.dynamic-ip.hinet.net. [111.241.168.233]) by smtp.gmail.com with ESMTPSA id j126sm16583137pfb.186.2019.10.14.00.58.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Oct 2019 00:58:43 -0700 (PDT) From: Green Wan To: Subject: [RFC v2 4/4] MAINTAINERS: Add Green as SiFive PDMA driver maintainer Date: Mon, 14 Oct 2019 15:54:27 +0800 Message-Id: <20191014075502.15105-5-green.wan@sifive.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191014075502.15105-1-green.wan@sifive.com> References: <20191014075502.15105-1-green.wan@sifive.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191014_005846_099250_03CEEA7B X-CRM114-Status: UNSURE ( 8.73 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:533 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Albert Ou , Greg Kroah-Hartman , Palmer Dabbelt , Yash Shah , Green Wan , Bin Meng , dmaengine@vger.kernel.org, Vinod Koul , Rob Herring , Sagar Kadam , Jonathan Cameron , Paul Walmsley , Mauro Carvalho Chehab , linux-hackers@sifive.com, Dan Williams , "Paul E. McKenney" , linux-riscv@lists.infradead.org, "David S. Miller" , linux-kernel@vger.kernel.org MIME-Version: 1.0 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org Update MAINTAINERS for SiFive PDMA driver. Signed-off-by: Green Wan --- MAINTAINERS | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index a69e6db80c79..62d5b249be65 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14778,6 +14778,12 @@ F: drivers/media/usb/siano/ F: drivers/media/usb/siano/ F: drivers/media/mmc/siano/ +SIFIVE PDMA DRIVER +M: Green Wan +S: Maintained +F: drivers/dma/sf-pdma/ +F: Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml + SIFIVE DRIVERS M: Palmer Dabbelt M: Paul Walmsley