From patchwork Mon Dec 19 18:29:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 635736 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D5E8C4332F for ; Mon, 19 Dec 2022 18:34:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232416AbiLSSeH (ORCPT ); Mon, 19 Dec 2022 13:34:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45688 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232323AbiLSSdX (ORCPT ); Mon, 19 Dec 2022 13:33:23 -0500 Received: from mail-pj1-x1036.google.com (mail-pj1-x1036.google.com [IPv6:2607:f8b0:4864:20::1036]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9CDBE14D10 for ; Mon, 19 Dec 2022 10:31:47 -0800 (PST) Received: by mail-pj1-x1036.google.com with SMTP id q17-20020a17090aa01100b002194cba32e9so14005822pjp.1 for ; Mon, 19 Dec 2022 10:31:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=U0UVprkCJUNnL3nMo7DxPvkgB/NZqmZRp7qZPXJUTiQ=; b=v5Q/tsiTj8CO9hRqpilsQt5aaiHSL8pJaJwb6zanTE3fKoa/ebUg5aUv0PeyWt3Nc/ BwOp2KFZQvmHDB+VERDrQVBZZxm684dQkxm5sZR1DXxjnR4auPtJhDDa/PdF/GHQlUye kk42kz/EUFAH6bSPswPvS1fiLDFopuP9X4zqE82oGqk39UrQ6Vwo769pxNvlKCmWAyFb CQtJzXrST5spINEiLoSz7dIQaE1sI/ytDJqeSKIe4DU/zOIEMa/wVPIpNc0NI5Ak63fn lfX8ccDj3ZkkCV31dmSEtS6El2irbZWXeMnrQs/dD9spiUuM8jA2K6ZCxh9XKPWoQU1K 52XQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=U0UVprkCJUNnL3nMo7DxPvkgB/NZqmZRp7qZPXJUTiQ=; b=C4XKXSPYmruUTvl03gybsYCa19MwgG6gYh9LqnZVF5TjXINHINhi0FIP5HFceYAYZt 1GRe5wolGiadPplrBDCxD5+cvREj+vXPaRsEpHhvvXDLOYrWtxOblosoyHQTVvR0w5to OB5+ibguZmpW0zMHUJgFmGGIA0ANY+NDqtY3IqSi92vF4Ux28CCPPPnle6IAlRXg8rTB nr+0LZnZMVfCNImQAipkVGyFtHEaZeiBMCYfsSuRUyUT2PmhXdLLZyNTi8Q8D8mr3hzi FqF1tOPOF5420xyBIzV8PnJc4Kg+mESQN2UlwKxyWsvmU2iscuePXqLxm4XwWpuG2dM6 Tjgw== X-Gm-Message-State: AFqh2koseJTpuSIYbfVp5sfBKMKqGQRdOZaEN3L15oSyT+i0uVKO4RY7 LUCVxDjxqMYPEo7hb5GrGck2 X-Google-Smtp-Source: AMrXdXvvWi5urLOltFHSWO9XTwbdECM7insHBSpYDH1ndNoV8DUX4qdhGv33xv3vkntPREWim1pzAQ== X-Received: by 2002:a17:902:7841:b0:190:fd03:7d3d with SMTP id e1-20020a170902784100b00190fd037d3dmr7851975pln.56.1671474707019; Mon, 19 Dec 2022 10:31:47 -0800 (PST) Received: from localhost.localdomain ([220.158.159.17]) by smtp.gmail.com with ESMTPSA id d2-20020a170903230200b00186e34524e3sm7480979plh.136.2022.12.19.10.31.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Dec 2022 10:31:46 -0800 (PST) From: Manivannan Sadhasivam To: andersson@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, bp@alien8.de, tony.luck@intel.com Cc: quic_saipraka@quicinc.com, konrad.dybcio@linaro.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, james.morse@arm.com, mchehab@kernel.org, rric@kernel.org, linux-edac@vger.kernel.org, quic_ppareek@quicinc.com, luca.weiss@fairphone.com, ahalaney@redhat.com, Manivannan Sadhasivam Subject: [PATCH v3 14/15] qcom: llcc/edac: Fix the base address used for accessing LLCC banks Date: Mon, 19 Dec 2022 23:59:57 +0530 Message-Id: <20221219182958.476231-15-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221219182958.476231-1-manivannan.sadhasivam@linaro.org> References: <20221219182958.476231-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The Qualcomm LLCC/EDAC drivers were using a fixed register stride for accessing the (Control and Status Registers) CSRs of each LLCC bank. This stride only works for some SoCs like SDM845 for which driver support was initially added. But the later SoCs use different register stride that vary between the banks with holes in-between. So it is not possible to use a single register stride for accessing the CSRs of each bank. By doing so could result in a crash. For fixing this issue, let's obtain the base address of each LLCC bank from devicetree and get rid of the fixed stride. This also means, we no longer need to rely on reg-names property and get the base addresses using index. First index is LLCC bank 0 and last index is LLCC broadcast. If the SoC supports more than one bank, then those needs to be defined in devicetree for index from 1..N-1. Reported-by: Parikshit Pareek Tested-by: Luca Weiss Signed-off-by: Manivannan Sadhasivam --- drivers/edac/qcom_edac.c | 14 +++--- drivers/soc/qcom/llcc-qcom.c | 72 +++++++++++++++++------------- include/linux/soc/qcom/llcc-qcom.h | 6 +-- 3 files changed, 48 insertions(+), 44 deletions(-) diff --git a/drivers/edac/qcom_edac.c b/drivers/edac/qcom_edac.c index 9e77fa84e84f..f40bb49bccd4 100644 --- a/drivers/edac/qcom_edac.c +++ b/drivers/edac/qcom_edac.c @@ -213,7 +213,7 @@ dump_syn_reg_values(struct llcc_drv_data *drv, u32 bank, int err_type) for (i = 0; i < reg_data.reg_cnt; i++) { synd_reg = reg_data.synd_reg + (i * 4); - ret = regmap_read(drv->regmap, drv->offsets[bank] + synd_reg, + ret = regmap_read(drv->regmaps[bank], synd_reg, &synd_val); if (ret) goto clear; @@ -222,8 +222,7 @@ dump_syn_reg_values(struct llcc_drv_data *drv, u32 bank, int err_type) reg_data.name, i, synd_val); } - ret = regmap_read(drv->regmap, - drv->offsets[bank] + reg_data.count_status_reg, + ret = regmap_read(drv->regmaps[bank], reg_data.count_status_reg, &err_cnt); if (ret) goto clear; @@ -233,8 +232,7 @@ dump_syn_reg_values(struct llcc_drv_data *drv, u32 bank, int err_type) edac_printk(KERN_CRIT, EDAC_LLCC, "%s: Error count: 0x%4x\n", reg_data.name, err_cnt); - ret = regmap_read(drv->regmap, - drv->offsets[bank] + reg_data.ways_status_reg, + ret = regmap_read(drv->regmaps[bank], reg_data.ways_status_reg, &err_ways); if (ret) goto clear; @@ -296,8 +294,7 @@ llcc_ecc_irq_handler(int irq, void *edev_ctl) /* Iterate over the banks and look for Tag RAM or Data RAM errors */ for (i = 0; i < drv->num_banks; i++) { - ret = regmap_read(drv->regmap, - drv->offsets[i] + DRP_INTERRUPT_STATUS, + ret = regmap_read(drv->regmaps[i], DRP_INTERRUPT_STATUS, &drp_error); if (!ret && (drp_error & SB_ECC_ERROR)) { @@ -312,8 +309,7 @@ llcc_ecc_irq_handler(int irq, void *edev_ctl) if (!ret) irq_rc = IRQ_HANDLED; - ret = regmap_read(drv->regmap, - drv->offsets[i] + TRP_INTERRUPT_0_STATUS, + ret = regmap_read(drv->regmaps[i], TRP_INTERRUPT_0_STATUS, &trp_error); if (!ret && (trp_error & SB_ECC_ERROR)) { diff --git a/drivers/soc/qcom/llcc-qcom.c b/drivers/soc/qcom/llcc-qcom.c index 23ce2f78c4ed..72f3f2a9aaa0 100644 --- a/drivers/soc/qcom/llcc-qcom.c +++ b/drivers/soc/qcom/llcc-qcom.c @@ -62,8 +62,6 @@ #define LLCC_TRP_WRSC_CACHEABLE_EN 0x21f2c #define LLCC_TRP_ALGO_CFG8 0x21f30 -#define BANK_OFFSET_STRIDE 0x80000 - #define LLCC_VERSION_2_0_0_0 0x02000000 #define LLCC_VERSION_2_1_0_0 0x02010000 #define LLCC_VERSION_4_1_0_0 0x04010000 @@ -898,8 +896,8 @@ static int qcom_llcc_remove(struct platform_device *pdev) return 0; } -static struct regmap *qcom_llcc_init_mmio(struct platform_device *pdev, - const char *name) +static struct regmap *qcom_llcc_init_mmio(struct platform_device *pdev, u8 index, + const char *name) { void __iomem *base; struct regmap_config llcc_regmap_config = { @@ -909,7 +907,7 @@ static struct regmap *qcom_llcc_init_mmio(struct platform_device *pdev, .fast_io = true, }; - base = devm_platform_ioremap_resource_byname(pdev, name); + base = devm_platform_ioremap_resource(pdev, index); if (IS_ERR(base)) return ERR_CAST(base); @@ -927,6 +925,7 @@ static int qcom_llcc_probe(struct platform_device *pdev) const struct llcc_slice_config *llcc_cfg; u32 sz; u32 version; + struct regmap *regmap; drv_data = devm_kzalloc(dev, sizeof(*drv_data), GFP_KERNEL); if (!drv_data) { @@ -934,21 +933,51 @@ static int qcom_llcc_probe(struct platform_device *pdev) goto err; } - drv_data->regmap = qcom_llcc_init_mmio(pdev, "llcc_base"); - if (IS_ERR(drv_data->regmap)) { - ret = PTR_ERR(drv_data->regmap); + /* Initialize the first LLCC bank regmap */ + regmap = qcom_llcc_init_mmio(pdev, 0, "llcc0_base"); + if (IS_ERR(regmap)) { + ret = PTR_ERR(regmap); goto err; } - drv_data->bcast_regmap = - qcom_llcc_init_mmio(pdev, "llcc_broadcast_base"); + cfg = of_device_get_match_data(&pdev->dev); + + ret = regmap_read(regmap, cfg->reg_offset[LLCC_COMMON_STATUS0], &num_banks); + if (ret) + goto err; + + num_banks &= LLCC_LB_CNT_MASK; + num_banks >>= LLCC_LB_CNT_SHIFT; + drv_data->num_banks = num_banks; + + drv_data->regmaps = devm_kcalloc(dev, num_banks, sizeof(*drv_data->regmaps), GFP_KERNEL); + if (!drv_data->regmaps) { + ret = -ENOMEM; + goto err; + } + + drv_data->regmaps[0] = regmap; + + /* Initialize rest of LLCC bank regmaps */ + for (i = 1; i < num_banks; i++) { + char *base = kasprintf(GFP_KERNEL, "llcc%d_base", i); + + drv_data->regmaps[i] = qcom_llcc_init_mmio(pdev, i, base); + if (IS_ERR(drv_data->regmaps[i])) { + ret = PTR_ERR(drv_data->regmaps[i]); + kfree(base); + goto err; + } + + kfree(base); + } + + drv_data->bcast_regmap = qcom_llcc_init_mmio(pdev, i, "llcc_broadcast_base"); if (IS_ERR(drv_data->bcast_regmap)) { ret = PTR_ERR(drv_data->bcast_regmap); goto err; } - cfg = of_device_get_match_data(&pdev->dev); - /* Extract version of the IP */ ret = regmap_read(drv_data->bcast_regmap, cfg->reg_offset[LLCC_COMMON_HW_INFO], &version); @@ -957,15 +986,6 @@ static int qcom_llcc_probe(struct platform_device *pdev) drv_data->version = version; - ret = regmap_read(drv_data->regmap, cfg->reg_offset[LLCC_COMMON_STATUS0], - &num_banks); - if (ret) - goto err; - - num_banks &= LLCC_LB_CNT_MASK; - num_banks >>= LLCC_LB_CNT_SHIFT; - drv_data->num_banks = num_banks; - llcc_cfg = cfg->sct_data; sz = cfg->size; @@ -973,16 +993,6 @@ static int qcom_llcc_probe(struct platform_device *pdev) if (llcc_cfg[i].slice_id > drv_data->max_slices) drv_data->max_slices = llcc_cfg[i].slice_id; - drv_data->offsets = devm_kcalloc(dev, num_banks, sizeof(u32), - GFP_KERNEL); - if (!drv_data->offsets) { - ret = -ENOMEM; - goto err; - } - - for (i = 0; i < num_banks; i++) - drv_data->offsets[i] = i * BANK_OFFSET_STRIDE; - drv_data->bitmap = devm_bitmap_zalloc(dev, drv_data->max_slices, GFP_KERNEL); if (!drv_data->bitmap) { diff --git a/include/linux/soc/qcom/llcc-qcom.h b/include/linux/soc/qcom/llcc-qcom.h index ad1fd718169d..423220e66026 100644 --- a/include/linux/soc/qcom/llcc-qcom.h +++ b/include/linux/soc/qcom/llcc-qcom.h @@ -120,7 +120,7 @@ struct llcc_edac_reg_offset { /** * struct llcc_drv_data - Data associated with the llcc driver - * @regmap: regmap associated with the llcc device + * @regmaps: regmaps associated with the llcc device * @bcast_regmap: regmap associated with llcc broadcast offset * @cfg: pointer to the data structure for slice configuration * @edac_reg_offset: Offset of the LLCC EDAC registers @@ -129,12 +129,11 @@ struct llcc_edac_reg_offset { * @max_slices: max slices as read from device tree * @num_banks: Number of llcc banks * @bitmap: Bit map to track the active slice ids - * @offsets: Pointer to the bank offsets array * @ecc_irq: interrupt for llcc cache error detection and reporting * @version: Indicates the LLCC version */ struct llcc_drv_data { - struct regmap *regmap; + struct regmap **regmaps; struct regmap *bcast_regmap; const struct llcc_slice_config *cfg; const struct llcc_edac_reg_offset *edac_reg_offset; @@ -143,7 +142,6 @@ struct llcc_drv_data { u32 max_slices; u32 num_banks; unsigned long *bitmap; - u32 *offsets; int ecc_irq; u32 version; };