From patchwork Sun May 11 08:06:02 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Haojian Zhuang X-Patchwork-Id: 4149741 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 E05829F387 for ; Sun, 11 May 2014 08:10:34 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C1DBA202F0 for ; Sun, 11 May 2014 08:10:33 +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 B5FD52015A for ; Sun, 11 May 2014 08:10:32 +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 1WjOno-0004kZ-LK; Sun, 11 May 2014 08:08:08 +0000 Received: from mail-pa0-f50.google.com ([209.85.220.50]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WjOng-0004M1-7H for linux-arm-kernel@lists.infradead.org; Sun, 11 May 2014 08:08:01 +0000 Received: by mail-pa0-f50.google.com with SMTP id fb1so6143220pad.23 for ; Sun, 11 May 2014 01:07:39 -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=Hsjsld1aHnX5omLxQomx+ZcGM47YkbCGEClFwixQFv4=; b=Ct7PqwJ3GOXpBPS2SvAW8JxOEWwXfhhJ/nb800qjebBpfD1vgBY72TmlpW5NIoe1vP ZtmXEojsMXy+GabX+xE8PNVlOplIOXCCmD0Ns2Z12NSiM58qS67EBXfvpgjpncFilHpK xnTGPSWkloOAqZYWayjgNoB15QCJZ26Zp2nNhmxnXwCj1UDK4AmD7aZCooGRjk+k/To7 kBOWIC6gZTcXwEVuEzfnmWUaYzioJXbFaRuFz1P8SU430MY/VpnVx3DxdRqx6EUTyXp7 3+eBVVnSG8fepiZiRNKpHwczZzpxhvhkURQwyGo2Y6NGhhgjnWZNwwCSNEua9/+ndZbA hU3g== X-Gm-Message-State: ALoCoQmrUhXgVO0xZju2l4swEjfFjkcEBkuPEb+WjBOlgQU1YtYJesYJ326CsZAD78HE7iXoCRkk X-Received: by 10.66.148.134 with SMTP id ts6mr40969384pab.113.1399795659589; Sun, 11 May 2014 01:07:39 -0700 (PDT) Received: from localhost.localdomain ([140.206.182.114]) by mx.google.com with ESMTPSA id i10sm32062137pat.36.2014.05.11.01.07.30 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 11 May 2014 01:07:38 -0700 (PDT) From: Haojian Zhuang To: tglx@linutronix.de, linux@arm.linux.org.uk, linux-arm-kernel@lists.infradead.org, arnd@arndb.de, olof@lixom.net, khilman@kernel.org, xuwei5@hisilicon.com, christoffer.dall@linaro.org, Dave.Martin@arm.com, nicolas.pitre@linaro.org, marc.zyngier@arm.com Subject: [PATCH v6 06/15] ARM: hisi: enable MCPM implementation Date: Sun, 11 May 2014 16:06:02 +0800 Message-Id: <1399795571-17231-7-git-send-email-haojian.zhuang@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1399795571-17231-1-git-send-email-haojian.zhuang@linaro.org> References: <1399795571-17231-1-git-send-email-haojian.zhuang@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140511_010800_340575_89E1F38C X-CRM114-Status: GOOD ( 20.57 ) X-Spam-Score: -0.7 (/) Cc: Haojian Zhuang X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 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=-2.5 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 Multiple CPU clusters are used in Hisilicon HiP04 SoC. Now use MCPM framework to manage power on HiP04 SoC. Signed-off-by: Haojian Zhuang --- arch/arm/mach-hisi/Makefile | 1 + arch/arm/mach-hisi/platmcpm.c | 309 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 310 insertions(+) create mode 100644 arch/arm/mach-hisi/platmcpm.c diff --git a/arch/arm/mach-hisi/Makefile b/arch/arm/mach-hisi/Makefile index 2ae1b59..e7a8640 100644 --- a/arch/arm/mach-hisi/Makefile +++ b/arch/arm/mach-hisi/Makefile @@ -3,4 +3,5 @@ # obj-y += hisilicon.o +obj-$(CONFIG_MCPM) += platmcpm.o obj-$(CONFIG_SMP) += platsmp.o hotplug.o diff --git a/arch/arm/mach-hisi/platmcpm.c b/arch/arm/mach-hisi/platmcpm.c new file mode 100644 index 0000000..6208bc6 --- /dev/null +++ b/arch/arm/mach-hisi/platmcpm.c @@ -0,0 +1,309 @@ +/* + * Copyright (c) 2013-2014 Linaro Ltd. + * Copyright (c) 2013-2014 Hisilicon Limited. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + */ +#include +#include +#include + +#include +#include +#include + +#include "core.h" + +/* bits definition in SC_CPU_RESET_REQ[x]/SC_CPU_RESET_DREQ[x] + * 1 -- unreset; 0 -- reset + */ +#define CORE_RESET_BIT(x) (1 << x) +#define NEON_RESET_BIT(x) (1 << (x + 4)) +#define CORE_DEBUG_RESET_BIT(x) (1 << (x + 9)) +#define CLUSTER_L2_RESET_BIT (1 << 8) +#define CLUSTER_DEBUG_RESET_BIT (1 << 13) + +/* + * bits definition in SC_CPU_RESET_STATUS[x] + * 1 -- reset status; 0 -- unreset status + */ +#define CORE_RESET_STATUS(x) (1 << x) +#define NEON_RESET_STATUS(x) (1 << (x + 4)) +#define CORE_DEBUG_RESET_STATUS(x) (1 << (x + 9)) +#define CLUSTER_L2_RESET_STATUS (1 << 8) +#define CLUSTER_DEBUG_RESET_STATUS (1 << 13) +#define CORE_WFI_STATUS(x) (1 << (x + 16)) +#define CORE_WFE_STATUS(x) (1 << (x + 20)) +#define CORE_DEBUG_ACK(x) (1 << (x + 24)) + +#define SC_CPU_RESET_REQ(x) (0x520 + (x << 3)) /* reset */ +#define SC_CPU_RESET_DREQ(x) (0x524 + (x << 3)) /* unreset */ +#define SC_CPU_RESET_STATUS(x) (0x1520 + (x << 3)) + +#define FAB_SF_MODE 0x0c +#define FAB_SF_INVLD 0x10 + +/* bits definition in FB_SF_INVLD */ +#define FB_SF_INVLD_START (1 << 8) + +#define HIP04_MAX_CLUSTERS 4 +#define HIP04_MAX_CPUS_PER_CLUSTER 4 + +#define POLL_MSEC 10 +#define TIMEOUT_MSEC 1000 + +struct hip04_secondary_cpu_data { + u32 bootwrapper_phys; + u32 bootwrapper_size; + u32 bootwrapper_magic; + u32 relocation_entry; + u32 relocation_size; +}; + +static void __iomem *relocation, *sysctrl, *fabric; +static int hip04_cpu_table[HIP04_MAX_CLUSTERS][HIP04_MAX_CPUS_PER_CLUSTER]; +static DEFINE_SPINLOCK(boot_lock); +static struct hip04_secondary_cpu_data hip04_boot; + +static bool hip04_cluster_down(unsigned int cluster) +{ + int i; + + for (i = 0; i < HIP04_MAX_CPUS_PER_CLUSTER; i++) + if (hip04_cpu_table[cluster][i]) + return false; + return true; +} + +static void hip04_set_snoop_filter(unsigned int cluster, unsigned int on) +{ + unsigned long data; + + if (!fabric) + return; + data = readl_relaxed(fabric + FAB_SF_MODE); + if (on) + data |= 1 << cluster; + else + data &= ~(1 << cluster); + writel_relaxed(data, fabric + FAB_SF_MODE); + while (1) { + if (data == readl_relaxed(fabric + FAB_SF_MODE)) + break; + } +} + +static int hip04_mcpm_power_up(unsigned int cpu, unsigned int cluster) +{ + unsigned long data, mask; + + if (!relocation || !sysctrl) + return -ENODEV; + if (cluster >= HIP04_MAX_CLUSTERS || cpu >= HIP04_MAX_CPUS_PER_CLUSTER) + return -EINVAL; + + spin_lock_irq(&boot_lock); + writel_relaxed(hip04_boot.bootwrapper_phys, relocation); + writel_relaxed(hip04_boot.bootwrapper_magic, relocation + 4); + writel_relaxed(virt_to_phys(mcpm_entry_point), relocation + 8); + writel_relaxed(0, relocation + 12); + + if (hip04_cluster_down(cluster)) { + data = CLUSTER_DEBUG_RESET_BIT; + writel_relaxed(data, sysctrl + SC_CPU_RESET_DREQ(cluster)); + do { + mask = CLUSTER_DEBUG_RESET_STATUS; + data = readl_relaxed(sysctrl + \ + SC_CPU_RESET_STATUS(cluster)); + } while (data & mask); + hip04_set_snoop_filter(cluster, 1); + } + + hip04_cpu_table[cluster][cpu]++; + + data = CORE_RESET_BIT(cpu) | NEON_RESET_BIT(cpu) | \ + CORE_DEBUG_RESET_BIT(cpu); + writel_relaxed(data, sysctrl + SC_CPU_RESET_DREQ(cluster)); + spin_unlock_irq(&boot_lock); + msleep(POLL_MSEC); + + return 0; +} + +static void hip04_mcpm_power_down(void) +{ + unsigned int mpidr, cpu, cluster, data = 0; + bool skip_reset = false; + + mpidr = read_cpuid_mpidr(); + cpu = MPIDR_AFFINITY_LEVEL(mpidr, 0); + cluster = MPIDR_AFFINITY_LEVEL(mpidr, 1); + + __mcpm_cpu_going_down(cpu, cluster); + + spin_lock(&boot_lock); + BUG_ON(__mcpm_cluster_state(cluster) != CLUSTER_UP); + hip04_cpu_table[cluster][cpu]--; + if (hip04_cpu_table[cluster][cpu] == 1) { + /* A power_up request went ahead of us. */ + skip_reset = true; + } else if (hip04_cpu_table[cluster][cpu] > 1) { + pr_err("Cluster %d CPU%d is still running\n", cluster, cpu); + BUG(); + } + + spin_unlock(&boot_lock); + + v7_exit_coherency_flush(louis); + + __mcpm_cpu_down(cpu, cluster); + + if (!skip_reset) { + data = CORE_RESET_BIT(cpu) | NEON_RESET_BIT(cpu) | \ + CORE_DEBUG_RESET_BIT(cpu); + writel_relaxed(data, sysctrl + SC_CPU_RESET_REQ(cluster)); + } +} + +static int hip04_mcpm_wait_for_powerdown(unsigned int cpu, unsigned int cluster) +{ + unsigned int data, tries; + + BUG_ON(cluster >= HIP04_MAX_CLUSTERS || + cpu >= HIP04_MAX_CPUS_PER_CLUSTER); + + for (tries = 0; tries < TIMEOUT_MSEC / POLL_MSEC; tries++) { + data = readl_relaxed(sysctrl + SC_CPU_RESET_STATUS(cluster)); + if (!(data & CORE_RESET_STATUS(cpu))) { + msleep(POLL_MSEC); + continue; + } + return 0; + } + return -ETIMEDOUT; +} + +static void hip04_mcpm_powered_up(void) +{ + if (!relocation) + return; + spin_lock(&boot_lock); + writel_relaxed(0, relocation); + writel_relaxed(0, relocation + 4); + writel_relaxed(0, relocation + 8); + writel_relaxed(0, relocation + 12); + spin_unlock(&boot_lock); +} + +static const struct mcpm_platform_ops hip04_mcpm_ops = { + .power_up = hip04_mcpm_power_up, + .power_down = hip04_mcpm_power_down, + .wait_for_powerdown = hip04_mcpm_wait_for_powerdown, + .powered_up = hip04_mcpm_powered_up, +}; + +static bool __init hip04_cpu_table_init(void) +{ + unsigned int mpidr, cpu, cluster; + + mpidr = read_cpuid_mpidr(); + cpu = MPIDR_AFFINITY_LEVEL(mpidr, 0); + cluster = MPIDR_AFFINITY_LEVEL(mpidr, 1); + + if (cluster >= HIP04_MAX_CLUSTERS || + cpu >= HIP04_MAX_CPUS_PER_CLUSTER) { + pr_err("%s: boot CPU is out of bound!\n", __func__); + return false; + } + hip04_set_snoop_filter(cluster, 1); + hip04_cpu_table[cluster][cpu] = 1; + return true; +} + +static int __init hip04_mcpm_init(void) +{ + struct device_node *np, *np_fab; + int ret = -ENODEV; + + np = of_find_compatible_node(NULL, NULL, "hisilicon,sysctrl"); + if (!np) + goto err; + np_fab = of_find_compatible_node(NULL, NULL, "hisilicon,hip04-fabric"); + if (!np_fab) + goto err; + + if (of_property_read_u32(np, "bootwrapper-phys", + &hip04_boot.bootwrapper_phys)) { + pr_err("failed to get bootwrapper-phys\n"); + ret = -EINVAL; + goto err; + } + if (of_property_read_u32(np, "bootwrapper-size", + &hip04_boot.bootwrapper_size)) { + pr_err("failed to get bootwrapper-size\n"); + ret = -EINVAL; + goto err; + } + if (of_property_read_u32(np, "bootwrapper-magic", + &hip04_boot.bootwrapper_magic)) { + pr_err("failed to get bootwrapper-magic\n"); + ret = -EINVAL; + goto err; + } + if (of_property_read_u32(np, "relocation-entry", + &hip04_boot.relocation_entry)) { + pr_err("failed to get relocation-entry\n"); + ret = -EINVAL; + goto err; + } + if (of_property_read_u32(np, "relocation-size", + &hip04_boot.relocation_size)) { + pr_err("failed to get relocation-size\n"); + ret = -EINVAL; + goto err; + } + + relocation = ioremap(hip04_boot.relocation_entry, + hip04_boot.relocation_size); + if (!relocation) { + pr_err("failed to map relocation space\n"); + ret = -ENOMEM; + goto err; + } + sysctrl = of_iomap(np, 0); + if (!sysctrl) { + pr_err("failed to get sysctrl base\n"); + ret = -ENOMEM; + goto err_sysctrl; + } + fabric = of_iomap(np_fab, 0); + if (!fabric) { + pr_err("failed to get fabric base\n"); + ret = -ENOMEM; + goto err_fabric; + } + + if (!hip04_cpu_table_init()) + return -EINVAL; + ret = mcpm_platform_register(&hip04_mcpm_ops); + if (!ret) { + mcpm_sync_init(NULL); + pr_info("HiP04 MCPM initialized\n"); + } + return ret; +err_fabric: + iounmap(sysctrl); +err_sysctrl: + iounmap(relocation); +err: + return ret; +} +early_initcall(hip04_mcpm_init); + +bool __init hip04_smp_init_ops(void) +{ + mcpm_smp_set_ops(); + return true; +}