From patchwork Wed Sep 27 17:00:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sunil V L X-Patchwork-Id: 13401432 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 4257EE82CB3 for ; Wed, 27 Sep 2023 17:00:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version: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=luwc0SWxIU/+JMA3US9ktbehTJHD6CVLVvV/jS3AS2c=; b=Pu21cyeHAeFEcr yMN32ejgnQ1Lrv3q1cfnBGsyX535LJGq4L1QiEBJYOqUECmGdl7Xa5IMFUloFd1FZ9C2wecYLvqXG I3uJ+caxZDnRyHFMCfmHT4D+aOu80KokhMtHTOmaQV+IVjZyh2+qmUfsOWxNa+1bMMscUFCSH25w7 4Vrlb+udTvwoUwmqKSGMGVxF9UCvRt4wB4dV0v1+Grg+oa4uMQDk4opga4rV/PYng40MDPOGmWjWO UEyLrqaG5aHD5hXv8dg1UAWPtALEqT+Mgl30LlYLxGEjTCOpTuleqvohx4GI6uZ5e2NViJB8H27Bf WETmGQv7Ee5xbRBgQTJA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qlXtw-001TDy-15; Wed, 27 Sep 2023 17:00:40 +0000 Received: from mail-pg1-x52e.google.com ([2607:f8b0:4864:20::52e]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qlXtt-001TCU-1R for linux-riscv@lists.infradead.org; Wed, 27 Sep 2023 17:00:38 +0000 Received: by mail-pg1-x52e.google.com with SMTP id 41be03b00d2f7-517ab9a4a13so8328894a12.1 for ; Wed, 27 Sep 2023 10:00:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1695834033; x=1696438833; darn=lists.infradead.org; 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=g9sLv+V8gGTdOjGyr5tjbv9gRJE2ViFoNFxWNgg6Hz8=; b=CzUmCI0QdOFeGuGmULUdN3aTBBE+8+FSdiaZpk6sHcmes+8UF/lLKsGW3VsWzZJala EkLo594T7gIzZNZX/idgLCRUMBVmGOUys70rEBCj4edGqrvcChbvZ081Pfjp+zfz++yi cjKAsXx+TpT7161JGY/m+6N7/pHOU84QC64Fy9JGdgz0kWNpiP5KU0PLpcgVMzP7foK4 IV4TZYlLcjAsRbVdma9tOzstzwvZusbziR8kVxFukL6ozru4XOQ2Dx0Pg4LSjU+J/IwT fFV6rvwX/ew2OCXxZzpzKf7YGN5rUQMVVxgQ0k0fdCh2as3Sis2XdZHH/SqThOvdn03y HLPw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1695834033; x=1696438833; 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=g9sLv+V8gGTdOjGyr5tjbv9gRJE2ViFoNFxWNgg6Hz8=; b=GAAYNl2Zm98r2BcksHoOdnxWAfQsRzYC25JwUIZJuwJSY+JkL8xpuE2JEO9Pmw0hZ8 ieoV17deaf0waWaZP1A8xJbKKSeHeJ7LwAbx/+1S7bCKniFoFNvDO9OQw6eplM2iIjBk zyEybWgiDUa8sq+0plb7XkeMbkKBSC9f38KzVmV40gj1kZqWEgoV+AH6nYuVNtphxUqs Z8ZihZXwXK0TwoAUU0NG0FdZ1f4DLy0uTErDEViW7xhSB1FZQgpUn/0EJrndAAUYaf0m tNWVf9OODxUwPaNNk82j2DMZYDa19whf1pMmolRs7ITKCrooiAMp3zJMDK6C/FWrPZ9/ 1mBQ== X-Gm-Message-State: AOJu0YyFZuUZvimQ9GJcHMqB3sadWYYVeVSe1cBYK/BeVuXZVPV9Zz2/ EJcc306tXWsg7QZXYR0a2rW1oC5VOPDsYKAFS2A= X-Google-Smtp-Source: AGHT+IEa6asAbG8e1D9Wtlofxs/aqoo7qS7D0/bHcFiviEGPFGXQU+G/6kse8wYhSvo9I9okP5V4Sw== X-Received: by 2002:a05:6a20:7d95:b0:14c:daa9:5e22 with SMTP id v21-20020a056a207d9500b0014cdaa95e22mr2978244pzj.45.1695834033151; Wed, 27 Sep 2023 10:00:33 -0700 (PDT) Received: from sunil-pc.Dlink ([106.51.190.42]) by smtp.gmail.com with ESMTPSA id u7-20020a637907000000b00584b293d157sm3279396pgc.80.2023.09.27.10.00.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Sep 2023 10:00:32 -0700 (PDT) From: Sunil V L To: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org Subject: [PATCH v2 -next 2/4] RISC-V: ACPI: RHCT: Add function to get CBO block sizes Date: Wed, 27 Sep 2023 22:30:13 +0530 Message-Id: <20230927170015.295232-3-sunilvl@ventanamicro.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230927170015.295232-1-sunilvl@ventanamicro.com> References: <20230927170015.295232-1-sunilvl@ventanamicro.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230927_100037_485812_F3522764 X-CRM114-Status: GOOD ( 17.10 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Anup Patel , Albert Ou , Alexandre Ghiti , "Rafael J . Wysocki" , Daniel Lezcano , Atish Kumar Patra , Andy Shevchenko , Conor Dooley , Palmer Dabbelt , Paul Walmsley , Thomas Gleixner , Andrew Jones , Ard Biesheuvel , Len Brown Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Cache Block Operation (CBO) related block size in ACPI is provided by RHCT. Add support to read the CMO node in RHCT to get this information. Signed-off-by: Sunil V L --- arch/riscv/include/asm/acpi.h | 9 +++++ drivers/acpi/riscv/rhct.c | 72 ++++++++++++++++++++++++++++++++++- 2 files changed, 80 insertions(+), 1 deletion(-) diff --git a/arch/riscv/include/asm/acpi.h b/arch/riscv/include/asm/acpi.h index d5604d2073bc..0c4e8b35103e 100644 --- a/arch/riscv/include/asm/acpi.h +++ b/arch/riscv/include/asm/acpi.h @@ -66,6 +66,8 @@ int acpi_get_riscv_isa(struct acpi_table_header *table, unsigned int cpu, const char **isa); static inline int acpi_numa_get_nid(unsigned int cpu) { return NUMA_NO_NODE; } +int acpi_get_cbo_block_size(struct acpi_table_header *table, unsigned int cpu, u32 *cbom_size, + u32 *cboz_size, u32 *cbop_size); #else static inline void acpi_init_rintc_map(void) { } static inline struct acpi_madt_rintc *acpi_cpu_get_madt_rintc(int cpu) @@ -79,6 +81,13 @@ static inline int acpi_get_riscv_isa(struct acpi_table_header *table, return -EINVAL; } +static inline int acpi_get_cbo_block_size(struct acpi_table_header *table, + unsigned int cpu, u32 *cbom_size, + u32 *cboz_size, u32 *cbop_size) +{ + return -EINVAL; +} + #endif /* CONFIG_ACPI */ #endif /*_ASM_ACPI_H*/ diff --git a/drivers/acpi/riscv/rhct.c b/drivers/acpi/riscv/rhct.c index b280b3e9c7d9..9042949277f8 100644 --- a/drivers/acpi/riscv/rhct.c +++ b/drivers/acpi/riscv/rhct.c @@ -8,6 +8,7 @@ #define pr_fmt(fmt) "ACPI: RHCT: " fmt #include +#include static struct acpi_table_header *acpi_get_rhct(void) { @@ -56,7 +57,6 @@ int acpi_get_riscv_isa(struct acpi_table_header *table, unsigned int cpu, const } end = ACPI_ADD_PTR(struct acpi_rhct_node_header, rhct, rhct->header.length); - for (node = ACPI_ADD_PTR(struct acpi_rhct_node_header, rhct, rhct->node_offset); node < end; node = ACPI_ADD_PTR(struct acpi_rhct_node_header, node, node->length)) { @@ -81,3 +81,73 @@ int acpi_get_riscv_isa(struct acpi_table_header *table, unsigned int cpu, const return -1; } + +/* + * During early boot, the caller should call acpi_get_table() and pass its pointer to + * these functions(and free up later). At run time, since this table can be used + * multiple times, pass NULL so that the table remains in memory + */ +int acpi_get_cbo_block_size(struct acpi_table_header *table, unsigned int cpu, + u32 *cbom_size, u32 *cboz_size, u32 *cbop_size) +{ + struct acpi_rhct_node_header *node, *ref_node, *end; + u32 size_hdr = sizeof(struct acpi_rhct_node_header); + u32 size_hartinfo = sizeof(struct acpi_rhct_hart_info); + struct acpi_rhct_hart_info *hart_info; + struct acpi_rhct_cmo_node *cmo_node; + struct acpi_table_rhct *rhct; + u32 *hart_info_node_offset; + u32 acpi_cpu_id = get_acpi_id_for_cpu(cpu); + + BUG_ON(acpi_disabled); + + if (table) { + rhct = (struct acpi_table_rhct *)table; + } else { + rhct = (struct acpi_table_rhct *)acpi_get_rhct(); + if (!rhct) + return -ENOENT; + } + + end = ACPI_ADD_PTR(struct acpi_rhct_node_header, rhct, rhct->header.length); + for (node = ACPI_ADD_PTR(struct acpi_rhct_node_header, rhct, rhct->node_offset); + node < end; + node = ACPI_ADD_PTR(struct acpi_rhct_node_header, node, node->length)) { + if (node->type == ACPI_RHCT_NODE_TYPE_HART_INFO) { + hart_info = ACPI_ADD_PTR(struct acpi_rhct_hart_info, node, size_hdr); + hart_info_node_offset = ACPI_ADD_PTR(u32, hart_info, size_hartinfo); + if (acpi_cpu_id != hart_info->uid) + continue; + + for (int i = 0; i < hart_info->num_offsets; i++) { + ref_node = ACPI_ADD_PTR(struct acpi_rhct_node_header, + rhct, hart_info_node_offset[i]); + if (ref_node->type == ACPI_RHCT_NODE_TYPE_CMO) { + cmo_node = ACPI_ADD_PTR(struct acpi_rhct_cmo_node, + ref_node, size_hdr); + if (cbom_size && cmo_node->cbom_size <= 30) + *cbom_size = BIT(cmo_node->cbom_size); + + if (cboz_size && cmo_node->cboz_size <= 30) + *cboz_size = BIT(cmo_node->cboz_size); + + if (cbop_size && cmo_node->cbop_size <= 30) + *cbop_size = BIT(cmo_node->cbop_size); + + return 0; + } + } + } + } + + if (cbom_size) + *cbom_size = 0; + + if (cboz_size) + *cboz_size = 0; + + if (cbop_size) + *cbop_size = 0; + + return -ENOENT; +}