From patchwork Mon Sep 30 03:29:43 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qunqin Zhao X-Patchwork-Id: 13815351 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 9A6DE55E73; Mon, 30 Sep 2024 03:31:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727667108; cv=none; b=ekaQyC1LGXHODwbLbsfkdxUXkRq8gcdF7f7si6ZmhFIumiL2h2jfhs1qgJiNYEKoyE3k4bsjwILo0eXV6R4KEzDFHgmhKslj1BWIs0NmNvPDpfJh2tPjWJV1G5MgaxWOuVwBlZGF8DqXMIJH/aSyl8tIm2uHiUwYseGBG1lQgCc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727667108; c=relaxed/simple; bh=ExdNWHNzkd5pS53sl8d0jjJJ/SMyEYWzXyVEg3EQa7o=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Nb1c1lZb7uDsZx6aoclecp2fx0x5iFXFC+6oGSmhFWl6UKykTG+Z6zXSfKa6aYbVaK4AQOPQ0wLTzFJ9ZBX+YR9DfMBBpbkJyuIle9mr0ZC8MjXVh4Ew/1hRPXI2/04ZXKXNuFZy1XLKqd7eN1OZSKAeWC1nAcPDSNdkuuDs4As= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [10.40.54.90]) by gateway (Coremail) with SMTP id _____8Dxn_GgG_pmtF8EAA--.8833S3; Mon, 30 Sep 2024 11:31:44 +0800 (CST) Received: from localhost.localdomain (unknown [10.40.54.90]) by front2 (Coremail) with SMTP id qciowMCxbceZG_pmD9gYAA--.23677S4; Mon, 30 Sep 2024 11:31:42 +0800 (CST) From: Zhao Qunqin To: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, chenhuacai@kernel.org, bp@alien8.de, tony.luck@intel.com, james.morse@arm.com, mchehab@kernel.org, rric@kernel.org Cc: linux-edac@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@xen0n.name, loongarch@lists.linux.dev, Jonathan.Cameron@Huawei.com, Zhao Qunqin Subject: [PATCH v6 2/2] EDAC: Add EDAC driver for loongson memory controller Date: Mon, 30 Sep 2024 11:29:43 +0800 Message-Id: <20240930032943.5182-3-zhaoqunqin@loongson.cn> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20240930032943.5182-1-zhaoqunqin@loongson.cn> References: <20240930032943.5182-1-zhaoqunqin@loongson.cn> Precedence: bulk X-Mailing-List: linux-edac@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: qciowMCxbceZG_pmD9gYAA--.23677S4 X-CM-SenderInfo: 52kd01pxqtx0o6or00hjvr0hdfq/ X-Coremail-Antispam: 1Uk129KBj93XoW3ArWUXr18Kr45Jr1fKFy5ZFc_yoWxur13pF 15Aw1fGrW8tr13uws3ZrWUuF15Cws2ga42y3y3A3yY93srAryDZr95tFy2yFnrCrykGrW3 Xa4rKw4DuF4DGwbCm3ZEXasCq-sJn29KB7ZKAUJUUUU3529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUBSb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1Y6r17M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Cr0_Gr1UM28EF7xvwVC2z280aVAFwI0_Gr1j6F4UJwA2z4x0Y4vEx4A2jsIEc7CjxVAF wI0_Gr1j6F4UJwAaw2AFwI0_JF0_Jw1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqjxCEc2 xF0cIa020Ex4CE44I27wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_ Jw0_WrylYx0Ex4A2jsIE14v26r4j6F4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x 0EwIxGrwCY1x0262kKe7AKxVWUtVW8ZwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkE bVWUJVW8JwCFI7km07C267AKxVWUAVWUtwC20s026c02F40E14v26r1j6r18MI8I3I0E74 80Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_GFv_WrylIxkGc2Ij64vIr41lIxAIcVC0 I7IYx2IY67AKxVW5JVW7JwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Cr0_Gr1UMIIF0xvE42 xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVW8JVWxJwCI42IY6I8E87Iv6xkF 7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjxU4YLvDUUUU Reports single bit errors (CE) only. Signed-off-by: Zhao Qunqin --- Changes in v6: - Change the Kconfig name to CONFIG_EDAC_LOONGSON Changes in v5: - Drop the loongson_ prefix from all static functions. - Align function arguments on the opening brace. - Drop useless comments and useless wrapper. Drop side comments. - Reorder variable declarations. Changes in v4: - None Changes in v3: - Addressed review comments raised by Krzysztof and Huacai Changes in v2: - Addressed review comments raised by Krzysztof MAINTAINERS | 1 + arch/loongarch/Kconfig | 1 + drivers/edac/Kconfig | 8 ++ drivers/edac/Makefile | 1 + drivers/edac/loongson_edac.c | 168 +++++++++++++++++++++++++++++++++++ 5 files changed, 179 insertions(+) create mode 100644 drivers/edac/loongson_edac.c diff --git a/MAINTAINERS b/MAINTAINERS index 6cc8cfc8f..5b4526638 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13242,6 +13242,7 @@ M: Zhao Qunqin L: linux-edac@vger.kernel.org S: Maintained F: Documentation/devicetree/bindings/edac/loongson,ls3a5000-mc-edac.yaml +F: drivers/edac/loongson_edac.c LSILOGIC MPT FUSION DRIVERS (FC/SAS/SPI) M: Sathya Prakash diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 70f169210..9c135f1a2 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -181,6 +181,7 @@ config LOONGARCH select PCI_MSI_ARCH_FALLBACKS select PCI_QUIRKS select PERF_USE_VMALLOC + select EDAC_SUPPORT select RTC_LIB select SPARSE_IRQ select SYSCTL_ARCH_UNALIGN_ALLOW diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig index 81af6c344..1cf432102 100644 --- a/drivers/edac/Kconfig +++ b/drivers/edac/Kconfig @@ -564,5 +564,13 @@ config EDAC_VERSAL Support injecting both correctable and uncorrectable errors for debugging purposes. +config EDAC_LOONGSON + tristate "Loongson Memory Controller" + depends on LOONGARCH || COMPILE_TEST + help + Support for error detection and correction on the Loongson + family memory controller. This driver reports single bit + errors (CE) only. Loongson-3A5000/3C5000/3D5000/3C5000L/3A6000/3C6000 + are compatible. endif # EDAC diff --git a/drivers/edac/Makefile b/drivers/edac/Makefile index faf310eec..f8bdbc895 100644 --- a/drivers/edac/Makefile +++ b/drivers/edac/Makefile @@ -88,3 +88,4 @@ obj-$(CONFIG_EDAC_DMC520) += dmc520_edac.o obj-$(CONFIG_EDAC_NPCM) += npcm_edac.o obj-$(CONFIG_EDAC_ZYNQMP) += zynqmp_edac.o obj-$(CONFIG_EDAC_VERSAL) += versal_edac.o +obj-$(CONFIG_EDAC_LOONGSON) += loongson_edac.o diff --git a/drivers/edac/loongson_edac.c b/drivers/edac/loongson_edac.c new file mode 100644 index 000000000..2721dfba5 --- /dev/null +++ b/drivers/edac/loongson_edac.c @@ -0,0 +1,168 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2024 Loongson Technology Corporation Limited. + */ + +#include +#include +#include +#include + +#include "edac_module.h" + +enum ecc_index { + ECC_SET = 0, + ECC_RESERVED, + ECC_COUNT, + ECC_CS_COUNT, + ECC_CODE, + ECC_ADDR, + ECC_DATA0, + ECC_DATA1, + ECC_DATA2, + ECC_DATA3, +}; + +struct loongson_edac_pvt { + u64 *ecc_base; + int last_ce_count; +}; + +static int read_ecc(struct mem_ctl_info *mci) +{ + struct loongson_edac_pvt *pvt = mci->pvt_info; + u64 ecc; + int cs; + + if (!pvt->ecc_base) + return pvt->last_ce_count; + + ecc = pvt->ecc_base[ECC_CS_COUNT]; + /* cs0 -- cs3 */ + cs = ecc & 0xff; + cs += (ecc >> 8) & 0xff; + cs += (ecc >> 16) & 0xff; + cs += (ecc >> 24) & 0xff; + + return cs; +} + +static void edac_check(struct mem_ctl_info *mci) +{ + struct loongson_edac_pvt *pvt = mci->pvt_info; + int new, add; + + new = read_ecc(mci); + add = new - pvt->last_ce_count; + pvt->last_ce_count = new; + if (add <= 0) + return; + + edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, add, + 0, 0, 0, 0, 0, -1, "error", ""); + edac_mc_printk(mci, KERN_INFO, "add: %d", add); +} + +static int get_dimm_config(struct mem_ctl_info *mci) +{ + struct dimm_info *dimm; + u32 size, npages; + + /* size not used */ + size = -1; + npages = MiB_TO_PAGES(size); + + dimm = edac_get_dimm(mci, 0, 0, 0); + dimm->nr_pages = npages; + snprintf(dimm->label, sizeof(dimm->label), + "MC#%uChannel#%u_DIMM#%u", mci->mc_idx, 0, 0); + dimm->grain = 8; + + return 0; +} + +static void pvt_init(struct mem_ctl_info *mci, u64 *vbase) +{ + struct loongson_edac_pvt *pvt = mci->pvt_info; + + pvt->ecc_base = vbase; + pvt->last_ce_count = read_ecc(mci); +} + +static int edac_probe(struct platform_device *pdev) +{ + struct edac_mc_layer layers[2]; + struct loongson_edac_pvt *pvt; + struct mem_ctl_info *mci; + u64 *vbase; + int ret; + + vbase = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(vbase)) + return PTR_ERR(vbase); + + /* allocate a new MC control structure */ + layers[0].type = EDAC_MC_LAYER_CHANNEL; + layers[0].size = 1; + layers[0].is_virt_csrow = false; + layers[1].type = EDAC_MC_LAYER_SLOT; + layers[1].size = 1; + layers[1].is_virt_csrow = true; + mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, sizeof(*pvt)); + if (mci == NULL) + return -ENOMEM; + + mci->mc_idx = edac_device_alloc_index(); + mci->mtype_cap = MEM_FLAG_RDDR4; + mci->edac_ctl_cap = EDAC_FLAG_NONE; + mci->edac_cap = EDAC_FLAG_NONE; + mci->mod_name = "loongson_edac.c"; + mci->ctl_name = "loongson_edac_ctl"; + mci->dev_name = "loongson_edac_dev"; + mci->ctl_page_to_phys = NULL; + mci->pdev = &pdev->dev; + mci->error_desc.grain = 8; + /* Set the function pointer to an actual operation function */ + mci->edac_check = edac_check; + + pvt_init(mci, vbase); + get_dimm_config(mci); + + ret = edac_mc_add_mc(mci); + if (ret) { + edac_dbg(0, "MC: failed edac_mc_add_mc()\n"); + edac_mc_free(mci); + return ret; + } + edac_op_state = EDAC_OPSTATE_POLL; + + return 0; +} + +static void edac_remove(struct platform_device *pdev) +{ + struct mem_ctl_info *mci = edac_mc_del_mc(&pdev->dev); + + if (mci) + edac_mc_free(mci); +} + +static const struct of_device_id loongson_edac_of_match[] = { + { .compatible = "loongson,ls3a5000-mc-edac", }, + {} +}; +MODULE_DEVICE_TABLE(of, loongson_edac_of_match); + +static struct platform_driver loongson_edac_driver = { + .probe = edac_probe, + .remove = edac_remove, + .driver = { + .name = "loongson-mc-edac", + .of_match_table = loongson_edac_of_match, + }, +}; +module_platform_driver(loongson_edac_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Zhao Qunqin "); +MODULE_DESCRIPTION("EDAC driver for loongson memory controller");