From patchwork Mon Aug 4 15:28:19 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hanjun Guo X-Patchwork-Id: 4671141 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 3EB369F375 for ; Mon, 4 Aug 2014 15:34:01 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 05C832012F for ; Mon, 4 Aug 2014 15:34:00 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CCE2720127 for ; Mon, 4 Aug 2014 15:33:58 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XEKEn-00021K-Ur; Mon, 04 Aug 2014 15:31:49 +0000 Received: from mail-pd0-f176.google.com ([209.85.192.176]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XEKEL-0000sl-6p for linux-arm-kernel@lists.infradead.org; Mon, 04 Aug 2014 15:31:22 +0000 Received: by mail-pd0-f176.google.com with SMTP id y10so9825866pdj.7 for ; Mon, 04 Aug 2014 08:30:59 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=pMhr9monFCWGR2pTcfi7FJtVVIxkjgTsz1ncfXerFfU=; b=YC5Gk/KN4YXctSRN744LHQpUe7qCg/itXUmAcMdbgc2/GL4UcvQgFnsIY8JDH4VkDJ rhsejlS5huq3EouT0auFpIg2HxzPy0E1N2qkcSF3wZa/scjZogt+33gTsYamoB0dlWvz 1BQEEKBCL99pNLlkiQtEyW+VcM4Q4gxx1LUn8I2LJHjmz38MQO72PxnHBycYlringdgG 7YHHUcutrr2tOjgIWIUZOte3JT+m67yjOcG//X8xSTFVc+sBGQJAASZLxArz95DXlSPO 4iZHcMHkVLYqIBgr/fyLHQAgq0GvQRV23lctQ/yoSM72AvfG+xlEzRJA2HcYbz88hWow 7+iA== X-Gm-Message-State: ALoCoQlEHO+D8O9ACDCIByRDXA6R2nCWV6lcUTM5Y+9XgZJh61WNdN/xAHJV8+bQd+Aww0wF4Ken X-Received: by 10.66.119.39 with SMTP id kr7mr3100588pab.131.1407166259273; Mon, 04 Aug 2014 08:30:59 -0700 (PDT) Received: from localhost ([39.182.20.233]) by mx.google.com with ESMTPSA id gb1sm17804850pbd.76.2014.08.04.08.30.51 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Mon, 04 Aug 2014 08:30:58 -0700 (PDT) From: Hanjun Guo To: Catalin Marinas , "Rafael J. Wysocki" , Mark Rutland Subject: [PATCH v2 12/18] ARM64 / ACPI: Add GICv2 specific ACPI boot support Date: Mon, 4 Aug 2014 23:28:19 +0800 Message-Id: <1407166105-17675-13-git-send-email-hanjun.guo@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1407166105-17675-1-git-send-email-hanjun.guo@linaro.org> References: <1407166105-17675-1-git-send-email-hanjun.guo@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140804_083121_333722_F07EC431 X-CRM114-Status: GOOD ( 22.59 ) X-Spam-Score: -1.4 (-) Cc: linaro-acpi@lists.linaro.org, Liviu Dudau , Lv Zheng , Rob Herring , Lorenzo Pieralisi , Daniel Lezcano , Robert Moore , linux-acpi@vger.kernel.org, Grant Likely , Charles.Garcia-Tobin@arm.com, Robert Richter , Jason Cooper , Arnd Bergmann , Marc Zyngier , Will Deacon , Tomasz Nowicki , Mark Brown , Bjorn Helgaas , linux-arm-kernel@lists.infradead.org, Graeme Gregory , Randy Dunlap , linux-kernel@vger.kernel.org, Hanjun Guo , Sudeep Holla , Olof Johansson X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tomasz Nowicki ACPI kernel uses MADT table for proper GIC initialization. It needs to parse GIC related subtables, collect CPU interface and distributor addresses and call driver initialization function (which is hardware abstraction agnostic). In a similar way, FDT initialize GICv1/2. NOTE: This commit allow to initialize GICv1/2 only. Signed-off-by: Tomasz Nowicki Signed-off-by: Hanjun Guo --- arch/arm64/include/asm/acpi.h | 2 - arch/arm64/kernel/acpi.c | 26 +++++++- arch/arm64/kernel/irq.c | 5 ++ drivers/irqchip/irq-gic.c | 114 ++++++++++++++++++++++++++++++++++ include/linux/irqchip/arm-gic-acpi.h | 36 +++++++++++ 5 files changed, 180 insertions(+), 3 deletions(-) create mode 100644 include/linux/irqchip/arm-gic-acpi.h diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h index a81898d..009303d 100644 --- a/arch/arm64/include/asm/acpi.h +++ b/arch/arm64/include/asm/acpi.h @@ -99,8 +99,6 @@ static inline void arch_fix_phys_package_id(int num, u32 slot) { } extern int (*acpi_suspend_lowlevel)(void); #define acpi_wakeup_address 0 -#define MAX_GIC_CPU_INTERFACE 65535 - #endif /* CONFIG_ACPI */ #endif /*_ASM_ACPI_H*/ diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c index 621ced8..988fea2 100644 --- a/arch/arm64/kernel/acpi.c +++ b/arch/arm64/kernel/acpi.c @@ -21,6 +21,7 @@ #include #include #include +#include #include @@ -159,7 +160,8 @@ static int __init acpi_parse_madt_gic_cpu_interface_entries(void) * we need for SMP init */ count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_INTERRUPT, - acpi_parse_gic_cpu_interface, MAX_GIC_CPU_INTERFACE); + acpi_parse_gic_cpu_interface, + ACPI_GIC_MAX_CPU_INTERFACE); if (!count) { pr_err("No GIC CPU interface entries present\n"); @@ -311,6 +313,28 @@ int __init acpi_boot_init(void) return err; } +void __init acpi_gic_init(void) +{ + struct acpi_table_header *table; + acpi_status status; + acpi_size tbl_size; + int err; + + status = acpi_get_table_with_size(ACPI_SIG_MADT, 0, &table, &tbl_size); + if (ACPI_FAILURE(status)) { + const char *msg = acpi_format_exception(status); + + pr_err("Failed to get MADT table, %s\n", msg); + return; + } + + err = gic_v2_acpi_init(table); + if (err) + pr_err("Failed to initialize GIC IRQ controller"); + + early_acpi_os_unmap_memory((char *)table, tbl_size); +} + /* MPIDR value provided in GICC structure is 64 bits, but * the acpi processor driver use the 32 bits cpu hardware * ID (apic_id on intel platform) everywhere, it is pretty diff --git a/arch/arm64/kernel/irq.c b/arch/arm64/kernel/irq.c index 0f08dfd..c074d60 100644 --- a/arch/arm64/kernel/irq.c +++ b/arch/arm64/kernel/irq.c @@ -28,6 +28,7 @@ #include #include #include +#include unsigned long irq_err_count; @@ -78,6 +79,10 @@ void __init set_handle_irq(void (*handle_irq)(struct pt_regs *)) void __init init_IRQ(void) { irqchip_init(); + + if (!handle_arch_irq) + acpi_gic_init(); + if (!handle_arch_irq) panic("No interrupt controller found."); } diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c index 7c131cf..25860f0 100644 --- a/drivers/irqchip/irq-gic.c +++ b/drivers/irqchip/irq-gic.c @@ -35,12 +35,14 @@ #include #include #include +#include #include #include #include #include #include #include +#include #include #include @@ -1082,3 +1084,115 @@ IRQCHIP_DECLARE(msm_8660_qgic, "qcom,msm-8660-qgic", gic_of_init); IRQCHIP_DECLARE(msm_qgic2, "qcom,msm-qgic2", gic_of_init); #endif + +#ifdef CONFIG_ACPI +static u64 dist_phy_base, cpu_phy_base = ULONG_MAX; + +static int __init +gic_acpi_parse_madt_cpu(struct acpi_subtable_header *header, + const unsigned long end) +{ + struct acpi_madt_generic_interrupt *processor; + u64 gic_cpu_base; + + processor = (struct acpi_madt_generic_interrupt *)header; + + if (BAD_MADT_ENTRY(processor, end)) + return -EINVAL; + + gic_cpu_base = processor->base_address; + if (!gic_cpu_base) + return -EFAULT; + + /* + * There is no support for non-banked GICv1/2 register in ACPI spec. + * All CPU interface addresses have to be the same. + */ + if (cpu_phy_base != ULONG_MAX && gic_cpu_base != cpu_phy_base) + return -EFAULT; + + cpu_phy_base = gic_cpu_base; + return 0; +} + +static int __init +gic_acpi_parse_madt_distributor(struct acpi_subtable_header *header, + const unsigned long end) +{ + struct acpi_madt_generic_distributor *dist; + + dist = (struct acpi_madt_generic_distributor *)header; + + if (BAD_MADT_ENTRY(dist, end)) + return -EINVAL; + + dist_phy_base = dist->base_address; + if (!dist_phy_base) + return -EFAULT; + + return 0; +} + +int __init +gic_v2_acpi_init(struct acpi_table_header *table) +{ + void __iomem *cpu_base, *dist_base; + int count; + + /* Collect CPU base addresses */ + count = acpi_parse_entries(sizeof(struct acpi_table_madt), + gic_acpi_parse_madt_cpu, table, + ACPI_MADT_TYPE_GENERIC_INTERRUPT, + ACPI_GIC_MAX_CPU_INTERFACE); + if (count < 0) { + pr_err("Error during GICC entries parsing\n"); + return -EFAULT; + } else if (!count) { + /* No GICC entries provided, use address from MADT header */ + struct acpi_table_madt *madt = (struct acpi_table_madt *)table; + + if (!madt->address) + return -EFAULT; + + cpu_phy_base = (u64)madt->address; + } + + /* + * Find distributor base address. We expect one distributor entry since + * ACPI 5.1 spec neither support multi-GIC instances nor GIC cascade. + */ + count = acpi_parse_entries(sizeof(struct acpi_table_madt), + gic_acpi_parse_madt_distributor, table, + ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR, + ACPI_GIC_MAX_DISTRIBUTOR); + if (count <= 0) { + pr_err("Error during GICD entries parsing\n"); + return -EFAULT; + } else if (count > 1) { + pr_err("More than one GICD entry detected\n"); + return -EINVAL; + } + + cpu_base = ioremap(cpu_phy_base, ACPI_GIC_CPU_IF_MEM_SIZE); + if (!cpu_base) { + pr_err("Unable to map GICC registers\n"); + return -ENOMEM; + } + + dist_base = ioremap(dist_phy_base, ACPI_GIC_DIST_MEM_SIZE); + if (!dist_base) { + pr_err("Unable to map GICD registers\n"); + iounmap(cpu_base); + return -ENOMEM; + } + + /* + * Initialize zero GIC instance (no multi-GIC support). Also, set GIC + * as default IRQ domain to allow for GSI registration and GSI to IRQ + * number translation (see acpi_register_gsi() and acpi_gsi_to_irq()). + */ + gic_init_bases(0, -1, dist_base, cpu_base, 0, NULL); + irq_set_default_host(gic_data[0].domain); + return 0; +} +#endif diff --git a/include/linux/irqchip/arm-gic-acpi.h b/include/linux/irqchip/arm-gic-acpi.h new file mode 100644 index 0000000..ffcfeb2 --- /dev/null +++ b/include/linux/irqchip/arm-gic-acpi.h @@ -0,0 +1,36 @@ +/* + * Copyright (C) 2014, Linaro Ltd. + * Author: Tomasz Nowicki + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef ARM_GIC_ACPI_H_ +#define ARM_GIC_ACPI_H_ + +#include + +#ifdef CONFIG_ACPI +#define ACPI_GIC_MAX_CPU_INTERFACE 65535 +#define ACPI_GIC_MAX_DISTRIBUTOR 1 + +/* + * Hard code here, we can not get memory size from MADT (but FDT does), + * Actually no need to do that, because this size can be inferred + * from GIC spec. + */ +#define ACPI_GIC_DIST_MEM_SIZE (SZ_64K) +#define ACPI_GIC_CPU_IF_MEM_SIZE (SZ_8K) + +void acpi_gic_init(void); +int gic_v2_acpi_init(struct acpi_table_header *table); +#else +static inline void acpi_gic_init(void) +{ + +} +#endif + +#endif /* ARM_GIC_ACPI_H_ */