From patchwork Thu Jan 11 13:17:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiju Jose X-Patchwork-Id: 761871 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) (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 64F893FE2E; Thu, 11 Jan 2024 13:18:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.18.186.31]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4T9lXR0c4jz6K8yJ; Thu, 11 Jan 2024 21:15:35 +0800 (CST) Received: from lhrpeml500006.china.huawei.com (unknown [7.191.161.198]) by mail.maildlp.com (Postfix) with ESMTPS id 58B24140D27; Thu, 11 Jan 2024 21:18:12 +0800 (CST) Received: from SecurePC30232.china.huawei.com (10.122.247.234) by lhrpeml500006.china.huawei.com (7.191.161.198) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Thu, 11 Jan 2024 13:18:11 +0000 From: To: , , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [RFC PATCH v5 11/12] ACPI:RAS2: Add driver for ACPI RAS2 feature table (RAS2) Date: Thu, 11 Jan 2024 21:17:40 +0800 Message-ID: <20240111131741.1356-12-shiju.jose@huawei.com> X-Mailer: git-send-email 2.35.1.windows.2 In-Reply-To: <20240111131741.1356-1-shiju.jose@huawei.com> References: <20240111131741.1356-1-shiju.jose@huawei.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: lhrpeml500004.china.huawei.com (7.191.163.9) To lhrpeml500006.china.huawei.com (7.191.161.198) From: Shiju Jose Add support for ACPI RAS2 feature table (RAS2) defined in the ACPI 6.5 Specification, section 5.2.21. This driver contains RAS2 Init, which extracts the RAS2 table. Driver adds platform device, for each memory feature, which binds to the RAS2 memory driver. Signed-off-by: Shiju Jose --- drivers/acpi/Makefile | 2 +- drivers/acpi/ras2_acpi.c | 97 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 98 insertions(+), 1 deletion(-) create mode 100755 drivers/acpi/ras2_acpi.c diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index f0788390516b..189ad0057a5c 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -104,7 +104,7 @@ obj-$(CONFIG_ACPI_CUSTOM_METHOD)+= custom_method.o obj-$(CONFIG_ACPI_BGRT) += bgrt.o obj-$(CONFIG_ACPI_CPPC_LIB) += cppc_acpi.o obj-$(CONFIG_ACPI_SPCR_TABLE) += spcr.o -obj-$(CONFIG_ACPI_RASF) += rasf_acpi_common.o +obj-$(CONFIG_ACPI_RASF) += rasf_acpi_common.o ras2_acpi.o obj-$(CONFIG_ACPI_DEBUGGER_USER) += acpi_dbg.o obj-$(CONFIG_ACPI_PPTT) += pptt.o obj-$(CONFIG_ACPI_PFRUT) += pfr_update.o pfr_telemetry.o diff --git a/drivers/acpi/ras2_acpi.c b/drivers/acpi/ras2_acpi.c new file mode 100755 index 000000000000..b8a7740355a8 --- /dev/null +++ b/drivers/acpi/ras2_acpi.c @@ -0,0 +1,97 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * ras2_acpi.c - Implementation of ACPI RAS2 feature table processing + * functions. + * + * Copyright (c) 2023 HiSilicon Limited. + * + * Support for + * RAS2 - ACPI 6.5 Specification, section 5.2.21 + * + * Driver contains RAS2 init, which extracts the RAS2 table and + * registers the PCC channel for communicating with the ACPI compliant + * platform that contains RAS2 command support in hardware.Driver adds + * platform device which binds to the RAS2 memory driver. + */ + +#define pr_fmt(fmt) "ACPI RAS2: " fmt + +#include +#include +#include +#include +#include +#include + +#define RAS2_FEATURE_TYPE_MEMORY 0x00 + +int __init ras2_acpi_init(void) +{ + u8 count; + acpi_status status; + acpi_size ras2_size; + int pcc_subspace_idx; + struct platform_device *pdev; + struct acpi_table_ras2 *pRas2Table; + struct acpi_ras2_pcc_desc *pcc_desc_list; + struct platform_device **pdev_list = NULL; + struct acpi_table_header *pAcpiTable = NULL; + + status = acpi_get_table("RAS2", 0, &pAcpiTable); + if (ACPI_FAILURE(status) || !pAcpiTable) { + pr_err("ACPI RAS2 driver failed to initialize, get table failed\n"); + return RASF_FAILURE; + } + + ras2_size = pAcpiTable->length; + if (ras2_size < sizeof(struct acpi_table_ras2)) { + pr_err("ACPI RAS2 table present but broken (too short #1)\n"); + goto free_ras2_table; + } + + pRas2Table = (struct acpi_table_ras2 *)pAcpiTable; + + if (pRas2Table->num_pcc_descs <= 0) { + pr_err("ACPI RAS2 table does not contain PCC descriptors\n"); + goto free_ras2_table; + } + + pdev_list = kzalloc((pRas2Table->num_pcc_descs * sizeof(struct platform_device *)), + GFP_KERNEL); + if (!pdev_list) + goto free_ras2_table; + + pcc_desc_list = (struct acpi_ras2_pcc_desc *) + ((void *)pRas2Table + sizeof(struct acpi_table_ras2)); + count = 0; + while (count < pRas2Table->num_pcc_descs) { + if (pcc_desc_list->feature_type == RAS2_FEATURE_TYPE_MEMORY) { + pcc_subspace_idx = pcc_desc_list->channel_id; + /* Add the platform device and bind ras2 memory driver */ + pdev = rasf_add_platform_device("ras2", &pcc_subspace_idx, + sizeof(pcc_subspace_idx)); + if (!pdev) + goto free_ras2_pdev; + pdev_list[count] = pdev; + } + count++; + pcc_desc_list = pcc_desc_list + sizeof(struct acpi_ras2_pcc_desc); + } + + acpi_put_table(pAcpiTable); + return RASF_SUCCESS; + +free_ras2_pdev: + count = 0; + while (count < pRas2Table->num_pcc_descs) { + if (pcc_desc_list->feature_type == + RAS2_FEATURE_TYPE_MEMORY) + platform_device_put(pdev_list[count++]); + } + kfree(pdev_list); + +free_ras2_table: + acpi_put_table(pAcpiTable); + return RASF_FAILURE; +} +late_initcall(ras2_acpi_init)