From patchwork Sun Sep 15 06:43:54 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Shenhar, Talel" X-Patchwork-Id: 11145827 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 EBF6C14E5 for ; Sun, 15 Sep 2019 06:44:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BCAC2214AF for ; Sun, 15 Sep 2019 06:44:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="I44xiNrA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725997AbfIOGoo (ORCPT ); Sun, 15 Sep 2019 02:44:44 -0400 Received: from smtp-fw-33001.amazon.com ([207.171.190.10]:27890 "EHLO smtp-fw-33001.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725991AbfIOGoo (ORCPT ); Sun, 15 Sep 2019 02:44:44 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1568529882; x=1600065882; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=K8qHOy9fVvlLJRAIk73fH7CpEDoCuO1D+QYFSr26fIE=; b=I44xiNrA2YVoDLvpyLna2lgmXktd7T5+QXXHw07jrMu5TQQtyR+/x/MU c0PHl3P91vLmJxTfzcoC/BiiAsuDAdasFLq1T45ODpfjCFCL9/jIc9emx mV0EwDqUbrngcsMgsRLJpIzZfVVaz1ebdA9StRlMN69BfJjj2ybBvJlM3 8=; X-IronPort-AV: E=Sophos;i="5.64,506,1559520000"; d="scan'208";a="832100191" Received: from sea3-co-svc-lb6-vlan2.sea.amazon.com (HELO email-inbound-relay-2a-538b0bfb.us-west-2.amazon.com) ([10.47.22.34]) by smtp-border-fw-out-33001.sea14.amazon.com with ESMTP; 15 Sep 2019 06:44:39 +0000 Received: from EX13MTAUEA001.ant.amazon.com (pdx4-ws-svc-p6-lb7-vlan3.pdx.amazon.com [10.170.41.166]) by email-inbound-relay-2a-538b0bfb.us-west-2.amazon.com (Postfix) with ESMTPS id B7E87A23F6; Sun, 15 Sep 2019 06:44:39 +0000 (UTC) Received: from EX13D01EUB002.ant.amazon.com (10.43.166.113) by EX13MTAUEA001.ant.amazon.com (10.43.61.243) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Sun, 15 Sep 2019 06:44:39 +0000 Received: from udc4a3e82dbc15a031435.hfa15.amazon.com (10.43.161.34) by EX13D01EUB002.ant.amazon.com (10.43.166.113) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Sun, 15 Sep 2019 06:44:29 +0000 From: Talel Shenhar To: , , , , , , , , , , , CC: , , , , , , , Subject: [PATCH v2 1/2] dt-bindings: edac: al-mc-edac: Amazon's Annapurna Labs Memory Controller EDAC Date: Sun, 15 Sep 2019 09:43:54 +0300 Message-ID: <1568529835-15319-2-git-send-email-talel@amazon.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1568529835-15319-1-git-send-email-talel@amazon.com> References: <1568529835-15319-1-git-send-email-talel@amazon.com> MIME-Version: 1.0 X-Originating-IP: [10.43.161.34] X-ClientProxiedBy: EX13d09UWA002.ant.amazon.com (10.43.160.186) To EX13D01EUB002.ant.amazon.com (10.43.166.113) Sender: linux-edac-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org Document Amazon's Annapurna Labs Memory Controller EDAC SoC binding. Signed-off-by: Talel Shenhar Reviewed-by: Rob Herring --- .../devicetree/bindings/edac/amazon,al-mc-edac.txt | 24 ++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 Documentation/devicetree/bindings/edac/amazon,al-mc-edac.txt diff --git a/Documentation/devicetree/bindings/edac/amazon,al-mc-edac.txt b/Documentation/devicetree/bindings/edac/amazon,al-mc-edac.txt new file mode 100644 index 0000000..4f612e0 --- /dev/null +++ b/Documentation/devicetree/bindings/edac/amazon,al-mc-edac.txt @@ -0,0 +1,24 @@ +Amazon's Annapurna Labs Memory Controller EDAC + +EDAC node is defined to describe on-chip error detection and correction for +Amazon's Annapurna Labs Memory Controller. + +Required properties: +- compatible: Shall be "amazon,al-mc-edac". +- reg: DDR controller resource. + +Optional: +- interrupt-names: may include "ue", for uncorrectable errors, + and/or "ce", for correctable errors. +- interrupts: should contain the interrupts associated with the + interrupts names. + +Example: + +edac@f0080000 { + compatible = "amazon,al-mc-edac"; + reg = <0x0 0xf0080000 0x0 0x00010000>; + interrupt-parent = <&amazon_al_system_fabric>; + interrupt-names = "ue"; + interrupts = <20 IRQ_TYPE_LEVEL_HIGH>; +}; From patchwork Sun Sep 15 06:43:55 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Shenhar, Talel" X-Patchwork-Id: 11145831 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 653FF14E5 for ; Sun, 15 Sep 2019 06:45:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2FD42214AF for ; Sun, 15 Sep 2019 06:45:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="Kq1tfvmz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726309AbfIOGpM (ORCPT ); Sun, 15 Sep 2019 02:45:12 -0400 Received: from smtp-fw-9102.amazon.com ([207.171.184.29]:23252 "EHLO smtp-fw-9102.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726293AbfIOGpM (ORCPT ); Sun, 15 Sep 2019 02:45:12 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1568529911; x=1600065911; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=bu/7yXbE/Yh0XFmwisdFyShDSu78iYw672Ugewn8uyU=; b=Kq1tfvmzpvlIedKajn27kygFLo65k62L05XieupsQHQPLp2mOmaWd4Ag KaWVOTAMyC8YmioxvG6z+g3JBp3yKwFK1OfO5P0jPx7/4ZdP0LJusbrm2 xf1mi/jqhBz8Y599nOFxylABVaVOX+4c49JrSkKdnkvm0j0Aw7PnYfLjA g=; X-IronPort-AV: E=Sophos;i="5.64,506,1559520000"; d="scan'208";a="702461185" Received: from sea3-co-svc-lb6-vlan3.sea.amazon.com (HELO email-inbound-relay-2a-119b4f96.us-west-2.amazon.com) ([10.47.22.38]) by smtp-border-fw-out-9102.sea19.amazon.com with ESMTP; 15 Sep 2019 06:44:51 +0000 Received: from EX13MTAUEA001.ant.amazon.com (pdx4-ws-svc-p6-lb7-vlan2.pdx.amazon.com [10.170.41.162]) by email-inbound-relay-2a-119b4f96.us-west-2.amazon.com (Postfix) with ESMTPS id 0D1F71A0CD8; Sun, 15 Sep 2019 06:44:49 +0000 (UTC) Received: from EX13D01EUB002.ant.amazon.com (10.43.166.113) by EX13MTAUEA001.ant.amazon.com (10.43.61.243) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Sun, 15 Sep 2019 06:44:48 +0000 Received: from udc4a3e82dbc15a031435.hfa15.amazon.com (10.43.161.34) by EX13D01EUB002.ant.amazon.com (10.43.166.113) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Sun, 15 Sep 2019 06:44:38 +0000 From: Talel Shenhar To: , , , , , , , , , , , CC: , , , , , , , Subject: [PATCH v2 2/2] EDAC: al-mc-edac: Introduce Amazon's Annapurna Labs Memory Controller EDAC Date: Sun, 15 Sep 2019 09:43:55 +0300 Message-ID: <1568529835-15319-3-git-send-email-talel@amazon.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1568529835-15319-1-git-send-email-talel@amazon.com> References: <1568529835-15319-1-git-send-email-talel@amazon.com> MIME-Version: 1.0 X-Originating-IP: [10.43.161.34] X-ClientProxiedBy: EX13d09UWA002.ant.amazon.com (10.43.160.186) To EX13D01EUB002.ant.amazon.com (10.43.166.113) Sender: linux-edac-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org The Amazon's Annapurna Labs Memory Controller EDAC supports ECC capability for error detection and correction (Single bit error correction, Double detection). This driver introduces EDAC driver for that capability. Signed-off-by: Talel Shenhar --- MAINTAINERS | 7 + drivers/edac/Kconfig | 7 + drivers/edac/Makefile | 1 + drivers/edac/al_mc_edac.c | 382 ++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 397 insertions(+) create mode 100644 drivers/edac/al_mc_edac.c diff --git a/MAINTAINERS b/MAINTAINERS index e81e60b..4b91e21 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -751,6 +751,13 @@ F: drivers/tty/serial/altera_jtaguart.c F: include/linux/altera_uart.h F: include/linux/altera_jtaguart.h +AMAZON ANNAPURNA LABS MEMORY CONTROLLER EDAC +M: Talel Shenhar +M: Talel Shenhar +S: Maintained +F: Documentation/devicetree/bindings/edac/amazon,al-mc-edac.txt +F: drivers/edac/al_mc_edac.c + AMAZON ANNAPURNA LABS THERMAL MMIO DRIVER M: Talel Shenhar S: Maintained diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig index 200c04c..e8109c1 100644 --- a/drivers/edac/Kconfig +++ b/drivers/edac/Kconfig @@ -100,6 +100,13 @@ config EDAC_AMD64_ERROR_INJECTION In addition, there are two control files, inject_read and inject_write, which trigger the DRAM ECC Read and Write respectively. +config EDAC_AL_MC + bool "Amazon's Annapurna Lab EDAC Memory Controller" + depends on ARCH_ALPINE + help + Support for error detection and correction for Amazon's Annapurna + Labs Alpine chips which allows 1 bit correction and 2 bits detection. + config EDAC_AMD76X tristate "AMD 76x (760, 762, 768)" depends on PCI && X86_32 diff --git a/drivers/edac/Makefile b/drivers/edac/Makefile index 165ca65e..f6c3a40 100644 --- a/drivers/edac/Makefile +++ b/drivers/edac/Makefile @@ -22,6 +22,7 @@ obj-$(CONFIG_EDAC_GHES) += ghes_edac.o edac_mce_amd-y := mce_amd.o obj-$(CONFIG_EDAC_DECODE_MCE) += edac_mce_amd.o +obj-$(CONFIG_EDAC_AL_MC) += al_mc_edac.o obj-$(CONFIG_EDAC_AMD76X) += amd76x_edac.o obj-$(CONFIG_EDAC_CPC925) += cpc925_edac.o obj-$(CONFIG_EDAC_I5000) += i5000_edac.o diff --git a/drivers/edac/al_mc_edac.c b/drivers/edac/al_mc_edac.c new file mode 100644 index 0000000..f9763d4 --- /dev/null +++ b/drivers/edac/al_mc_edac.c @@ -0,0 +1,382 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. + */ +#include +#include +#include +#include "edac_module.h" + +/* Registers Offset */ +#define AL_MC_MSTR 0x00 +#define AL_MC_ECC_CFG 0x70 +#define AL_MC_ECC_CLEAR 0x7c +#define AL_MC_ECC_ERR_COUNT 0x80 +#define AL_MC_ECC_CE_ADDR0 0x84 +#define AL_MC_ECC_CE_ADDR1 0x88 +#define AL_MC_ECC_UE_ADDR0 0xa4 +#define AL_MC_ECC_UE_ADDR1 0xa8 +#define AL_MC_ECC_CE_SYND0 0x8c +#define AL_MC_ECC_CE_SYND1 0x90 +#define AL_MC_ECC_CE_SYND2 0x94 +#define AL_MC_ECC_UE_SYND0 0xac +#define AL_MC_ECC_UE_SYND1 0xb0 +#define AL_MC_ECC_UE_SYND2 0xb4 + +/* Registers Fields */ +#define AL_MC_MSTR_DEV_CFG GENMASK(31, 30) +#define AL_MC_MSTR_RANKS GENMASK(27, 24) +#define AL_MC_MSTR_DATA_BUS_WIDTH GENMASK(13, 12) +#define AL_MC_MSTR_DDR4 BIT(4) +#define AL_MC_MSTR_DDR3 BIT(0) + +#define AL_MC_ECC_CFG_SCRUB_DISABLED BIT(4) +#define AL_MC_ECC_CFG_ECC_MODE GENMASK(2, 0) + +#define AL_MC_ECC_CLEAR_UE_COUNT BIT(3) +#define AL_MC_ECC_CLEAR_CE_COUNT BIT(2) +#define AL_MC_ECC_CLEAR_UE_ERR BIT(1) +#define AL_MC_ECC_CLEAR_CE_ERR BIT(0) + +#define AL_MC_ECC_ERR_COUNT_UE GENMASK(31, 16) +#define AL_MC_ECC_ERR_COUNT_CE GENMASK(15, 0) + +#define AL_MC_ECC_CE_ADDR0_RANK GENMASK(25, 24) +#define AL_MC_ECC_CE_ADDR0_ROW GENMASK(17, 0) + +#define AL_MC_ECC_CE_ADDR1_BG GENMASK(25, 24) +#define AL_MC_ECC_CE_ADDR1_BANK GENMASK(18, 16) +#define AL_MC_ECC_CE_ADDR1_COLUMN GENMASK(11, 0) + +#define AL_MC_ECC_UE_ADDR0_RANK GENMASK(25, 24) +#define AL_MC_ECC_UE_ADDR0_ROW GENMASK(17, 0) + +#define AL_MC_ECC_UE_ADDR1_BG GENMASK(25, 24) +#define AL_MC_ECC_UE_ADDR1_BANK GENMASK(18, 16) +#define AL_MC_ECC_UE_ADDR1_COLUMN GENMASK(11, 0) + +/* Registers Values */ +#define AL_MC_MSTR_DEV_CFG_X4 0 +#define AL_MC_MSTR_DEV_CFG_X8 1 +#define AL_MC_MSTR_DEV_CFG_X16 2 +#define AL_MC_MSTR_DEV_CFG_X32 3 +#define AL_MC_MSTR_RANKS_MAX 4 +#define AL_MC_MSTR_DATA_BUS_WIDTH_X64 0 + +#define DRV_NAME "al_mc_edac" +#define AL_MC_EDAC_MSG_MAX 256 +#define AL_MC_EDAC_MSG(message, buffer_size, type, \ + rank, row, bg, bank, column, syn0, syn1, syn2) \ + snprintf(message, buffer_size, \ + "%s rank=0x%x row=0x%x bg=0x%x bank=0x%x col=0x%x " \ + "syn0: 0x%x syn1: 0x%x syn2: 0x%x", \ + type == HW_EVENT_ERR_UNCORRECTED ? "UE" : "CE", \ + rank, row, bg, bank, column, syn0, syn1, syn2) + +struct al_mc_edac { + void __iomem *mmio_base; + int irq_ce; + int irq_ue; +}; + +static int al_mc_edac_handle_ce(struct mem_ctl_info *mci) +{ + struct al_mc_edac *al_mc = mci->pvt_info; + u32 eccerrcnt; + u16 ce_count; + u32 ecccaddr0; + u32 ecccaddr1; + u32 ecccsyn0; + u32 ecccsyn1; + u32 ecccsyn2; + u8 rank; + u32 row; + u8 bg; + u8 bank; + u16 column; + char msg[AL_MC_EDAC_MSG_MAX]; + + eccerrcnt = readl_relaxed(al_mc->mmio_base + AL_MC_ECC_ERR_COUNT); + ce_count = FIELD_GET(AL_MC_ECC_ERR_COUNT_CE, eccerrcnt); + if (!ce_count) + return 0; + + ecccaddr0 = readl_relaxed(al_mc->mmio_base + AL_MC_ECC_CE_ADDR0); + ecccaddr1 = readl_relaxed(al_mc->mmio_base + AL_MC_ECC_CE_ADDR1); + ecccsyn0 = readl_relaxed(al_mc->mmio_base + AL_MC_ECC_UE_SYND0); + ecccsyn1 = readl_relaxed(al_mc->mmio_base + AL_MC_ECC_UE_SYND1); + ecccsyn2 = readl_relaxed(al_mc->mmio_base + AL_MC_ECC_UE_SYND2); + + writel(AL_MC_ECC_CLEAR_CE_COUNT | AL_MC_ECC_CLEAR_CE_ERR, + al_mc->mmio_base + AL_MC_ECC_CLEAR); + + dev_dbg(mci->pdev, "eccuaddr0=0x%08x eccuaddr1=0x%08x\n", + ecccaddr0, ecccaddr1); + + rank = FIELD_GET(AL_MC_ECC_CE_ADDR0_RANK, ecccaddr0); + row = FIELD_GET(AL_MC_ECC_CE_ADDR0_ROW, ecccaddr0); + + bg = FIELD_GET(AL_MC_ECC_CE_ADDR1_BG, ecccaddr1); + bank = FIELD_GET(AL_MC_ECC_CE_ADDR1_BANK, ecccaddr1); + column = FIELD_GET(AL_MC_ECC_CE_ADDR1_COLUMN, ecccaddr1); + + AL_MC_EDAC_MSG(msg, sizeof(msg), HW_EVENT_ERR_CORRECTED, + rank, row, bg, bank, column, + ecccsyn0, ecccsyn1, ecccsyn2); + + edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, + ce_count, 0, 0, 0, 0, 0, -1, mci->ctl_name, msg); + + return ce_count; +} + +static int al_mc_edac_handle_ue(struct mem_ctl_info *mci) +{ + struct al_mc_edac *al_mc = mci->pvt_info; + u32 eccerrcnt; + u16 ue_count; + u32 eccuaddr0; + u32 eccuaddr1; + u32 eccusyn0; + u32 eccusyn1; + u32 eccusyn2; + u8 rank; + u32 row; + u8 bg; + u8 bank; + u16 column; + char msg[AL_MC_EDAC_MSG_MAX]; + + eccerrcnt = readl_relaxed(al_mc->mmio_base + AL_MC_ECC_ERR_COUNT); + ue_count = FIELD_GET(AL_MC_ECC_ERR_COUNT_UE, eccerrcnt); + if (!ue_count) + return 0; + + eccuaddr0 = readl_relaxed(al_mc->mmio_base + AL_MC_ECC_UE_ADDR0); + eccuaddr1 = readl_relaxed(al_mc->mmio_base + AL_MC_ECC_UE_ADDR1); + eccusyn0 = readl_relaxed(al_mc->mmio_base + AL_MC_ECC_UE_SYND0); + eccusyn1 = readl_relaxed(al_mc->mmio_base + AL_MC_ECC_UE_SYND1); + eccusyn2 = readl_relaxed(al_mc->mmio_base + AL_MC_ECC_UE_SYND2); + + writel(AL_MC_ECC_CLEAR_UE_COUNT | AL_MC_ECC_CLEAR_UE_ERR, + al_mc->mmio_base + AL_MC_ECC_CLEAR); + + dev_dbg(mci->pdev, "eccuaddr0=0x%08x eccuaddr1=0x%08x\n", + eccuaddr0, eccuaddr1); + + rank = FIELD_GET(AL_MC_ECC_UE_ADDR0_RANK, eccuaddr0); + row = FIELD_GET(AL_MC_ECC_UE_ADDR0_ROW, eccuaddr0); + + bg = FIELD_GET(AL_MC_ECC_UE_ADDR1_BG, eccuaddr1); + bank = FIELD_GET(AL_MC_ECC_UE_ADDR1_BANK, eccuaddr1); + column = FIELD_GET(AL_MC_ECC_UE_ADDR1_COLUMN, eccuaddr1); + + AL_MC_EDAC_MSG(msg, sizeof(msg), HW_EVENT_ERR_UNCORRECTED, + rank, row, bg, bank, column, + eccusyn0, eccusyn1, eccusyn2); + + edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, + ue_count, 0, 0, 0, 0, 0, -1, mci->ctl_name, msg); + return ue_count; +} + +static void al_mc_edac_check(struct mem_ctl_info *mci) +{ + struct al_mc_edac *al_mc = mci->pvt_info; + + if (al_mc->irq_ue <= 0) + al_mc_edac_handle_ue(mci); + + if (al_mc->irq_ce <= 0) + al_mc_edac_handle_ce(mci); +} + +static irqreturn_t al_mc_edac_irq_handler_ue(int irq, void *info) +{ + struct platform_device *pdev = info; + struct mem_ctl_info *mci = platform_get_drvdata(pdev); + int ue_count; + + ue_count = al_mc_edac_handle_ue(mci); + if (ue_count) + return IRQ_HANDLED; + else + return IRQ_NONE; +} + +static irqreturn_t al_mc_edac_irq_handler_ce(int irq, void *info) +{ + struct platform_device *pdev = info; + struct mem_ctl_info *mci = platform_get_drvdata(pdev); + int ce_count; + + ce_count = al_mc_edac_handle_ce(mci); + if (ce_count) + return IRQ_HANDLED; + else + return IRQ_NONE; +} + +static unsigned int al_mc_edac_get_active_ranks(void __iomem *mmio_base) +{ + u32 mstr; + + mstr = readl(mmio_base + AL_MC_MSTR); + + return hweight_long(FIELD_GET(AL_MC_MSTR_RANKS, mstr)); +} + +static enum scrub_type al_mc_edac_get_scrub_mode(void __iomem *mmio_base) +{ + u32 ecccfg0; + + ecccfg0 = readl(mmio_base + AL_MC_ECC_CFG); + + if (FIELD_GET(AL_MC_ECC_CFG_SCRUB_DISABLED, ecccfg0)) + return SCRUB_NONE; + else + return SCRUB_HW_SRC; +} + +static int al_mc_edac_probe(struct platform_device *pdev) +{ + struct resource *resource; + void __iomem *mmio_base; + unsigned int active_ranks; + struct edac_mc_layer layers[1]; + struct mem_ctl_info *mci; + struct al_mc_edac *al_mc; + int ret; + + resource = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mmio_base = devm_ioremap_resource(&pdev->dev, resource); + if (IS_ERR(mmio_base)) { + dev_err(&pdev->dev, "failed to ioremap memory (%ld)\n", + PTR_ERR(mmio_base)); + return PTR_ERR(mmio_base); + } + + active_ranks = al_mc_edac_get_active_ranks(mmio_base); + if (!active_ranks || active_ranks > AL_MC_MSTR_RANKS_MAX) { + dev_err(&pdev->dev, + "unsupported number of active ranks (%d)\n", + active_ranks); + return -ENODEV; + } + + layers[0].type = EDAC_MC_LAYER_CHIP_SELECT; + layers[0].size = active_ranks; + layers[0].is_virt_csrow = false; + mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, + sizeof(struct al_mc_edac)); + if (!mci) + return -ENOMEM; + + platform_set_drvdata(pdev, mci); + al_mc = mci->pvt_info; + + al_mc->mmio_base = mmio_base; + + al_mc->irq_ue = of_irq_get_byname(pdev->dev.of_node, "ue"); + if (al_mc->irq_ue <= 0) + dev_dbg(&pdev->dev, + "no irq defined for ue - falling back to polling\n"); + + al_mc->irq_ce = of_irq_get_byname(pdev->dev.of_node, "ce"); + if (al_mc->irq_ce <= 0) + dev_dbg(&pdev->dev, + "no irq defined for ce - falling back to polling\n"); + + if (al_mc->irq_ue <= 0 || al_mc->irq_ce <= 0) + edac_op_state = EDAC_OPSTATE_POLL; + else + edac_op_state = EDAC_OPSTATE_INT; + + mci->edac_check = al_mc_edac_check; + mci->mtype_cap = MEM_FLAG_DDR3 | MEM_FLAG_DDR4; + mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED; + mci->edac_cap = EDAC_FLAG_SECDED; + mci->mod_name = DRV_NAME; + mci->ctl_name = "al_mc"; + mci->pdev = &pdev->dev; + mci->scrub_mode = al_mc_edac_get_scrub_mode(mmio_base); + + ret = edac_mc_add_mc(mci); + if (ret < 0) { + dev_err(&pdev->dev, + "fail to add memory controller device (%d)\n", + ret); + goto err_add_mc; + } + + if (al_mc->irq_ue > 0) { + ret = devm_request_irq(&pdev->dev, + al_mc->irq_ue, + al_mc_edac_irq_handler_ue, + 0, + pdev->name, + pdev); + if (ret != 0) { + dev_err(&pdev->dev, + "failed to request ue irq %d (%d)\n", + al_mc->irq_ue, ret); + goto err_request_irq; + } + } + + if (al_mc->irq_ce > 0) { + ret = devm_request_irq(&pdev->dev, + al_mc->irq_ce, + al_mc_edac_irq_handler_ce, + 0, + pdev->name, + pdev); + if (ret != 0) { + dev_err(&pdev->dev, + "failed to request ce irq %d (%d)\n", + al_mc->irq_ce, ret); + goto err_request_irq; + } + } + + return 0; + +err_request_irq: + edac_mc_del_mc(&pdev->dev); +err_add_mc: + edac_mc_free(mci); + + return ret; +} + +static int al_mc_edac_remove(struct platform_device *pdev) +{ + struct mem_ctl_info *mci = platform_get_drvdata(pdev); + + edac_mc_del_mc(&pdev->dev); + edac_mc_free(mci); + + return 0; +} + +static const struct of_device_id al_mc_edac_of_match[] = { + { .compatible = "amazon,al-mc-edac", }, + {}, +}; + +MODULE_DEVICE_TABLE(of, al_mc_of_match); + +static struct platform_driver al_mc_edac_driver = { + .probe = al_mc_edac_probe, + .remove = al_mc_edac_remove, + .driver = { + .name = DRV_NAME, + .of_match_table = al_mc_edac_of_match, + }, +}; + +module_platform_driver(al_mc_edac_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Talel Shenhar"); +MODULE_DESCRIPTION("Amazon's Annapurna Lab's Memory Controller EDAC Driver");