From patchwork Mon Sep 5 20:05:37 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomasz Nowicki X-Patchwork-Id: 9315155 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 4F3B6607D3 for ; Mon, 5 Sep 2016 20:10:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3CE47288E4 for ; Mon, 5 Sep 2016 20:10:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2EB85200F5; Mon, 5 Sep 2016 20:10:35 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8C033200F5 for ; Mon, 5 Sep 2016 20:10:34 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bh0CP-0000Ba-PH; Mon, 05 Sep 2016 20:08:57 +0000 Received: from mail-lf0-x236.google.com ([2a00:1450:4010:c07::236]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bh0BL-0007lN-Ms for linux-arm-kernel@lists.infradead.org; Mon, 05 Sep 2016 20:07:57 +0000 Received: by mail-lf0-x236.google.com with SMTP id u14so9941613lfd.1 for ; Mon, 05 Sep 2016 13:07:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=semihalf-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=JoV6MbPZBYkv/nL3fzYZNDtkVSAuF2tH1TNypZLhhpE=; b=yanwH7CUSmguE97ANAqYv0buEcLeSo/yRdxSVUb/sn4aAYl5RKFLAX9uOZUMYS8BBg P1zKcxRMRAcAscKRVkCZFr3Dxi/pZ+d51cZwErD0uVYv6awu1oS4i0FwL1IdT57pCA0/ qYuFlSEO4fPVDPPKfVAFhSFVn46k9dXP+CP8vletEXucPxcIZLc8cbvyiS/65r+XPKfL 3AVv0N2BnoJrYc122AVP9EONlkBV9OiqQDMaXNpKQfeveFBzmMkhis4cjRjitV8Rtz1d G83QpMlIuTaP6m+MxSxoK955n1kh6O8uEi2PrE7cn45t4qTGg9Zas4jzpkUrfrO3sZXh Cq/A== 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=JoV6MbPZBYkv/nL3fzYZNDtkVSAuF2tH1TNypZLhhpE=; b=fEfemnzDD9DYc0RuMhEjIsrbXNeUOMrqngr8/RGQ3da4C8Kt3lbI/tReSpMEvXWotE ba38W33puwFWIOA9vc8DFhFEQsmEw6nCMh/jVPbtIEJFuYDGUsDzi51ErmOwlmiU6Yu+ STXB0BiLyIcypbyJ/KZAfRQDmkF9Al718801xyOrPjoiOQstxkI3dYC00LiJ8bg8harJ 8jHMvRTo92wnGQVzjFY9NwOgP1ZUy06n4BhuQrqvuCzTyFyaQcTQGUEoB5stCM76y7Ly 1hX2RvWlQYHsRfTSvOrtfjUH9th4T4mH8bD/gB/jforS5426lNvigTBkASnWcrcuHG1T NzCQ== X-Gm-Message-State: AE9vXwOB863n9twcWyX9WzwfCkijcTW7PNpM/N1Iriba3CVr7GvWysTwlnzIGiI4pQ0XgA== X-Received: by 10.46.33.168 with SMTP id h40mr3144973lji.1.1473106049610; Mon, 05 Sep 2016 13:07:29 -0700 (PDT) Received: from localhost.localdomain (50-233-148-156-static.hfc.comcastbusiness.net. [50.233.148.156]) by smtp.gmail.com with ESMTPSA id p82sm5068405lfd.15.2016.09.05.13.07.18 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 05 Sep 2016 13:07:28 -0700 (PDT) From: Tomasz Nowicki To: marc.zyngier@arm.com, tglx@linutronix.de, jason@lakedaemon.net, rjw@rjwysocki.net, helgaas@kernel.org, rafael@kernel.org, Lorenzo.Pieralisi@arm.com Subject: [PATCH V9 5/8] irqchip/gicv3-its: Refactor ITS DT init code to prepare for ACPI Date: Mon, 5 Sep 2016 22:05:37 +0200 Message-Id: <1473105940-9761-6-git-send-email-tn@semihalf.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1473105940-9761-1-git-send-email-tn@semihalf.com> References: <1473105940-9761-1-git-send-email-tn@semihalf.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160905_130752_642151_F5384710 X-CRM114-Status: GOOD ( 18.01 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: graeme.gregory@linaro.org, al.stone@linaro.org, linaro-acpi@lists.linaro.org, catalin.marinas@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, okaya@codeaurora.org, linux-acpi@vger.kernel.org, robert.richter@caviumnetworks.com, hanjun.guo@linaro.org, ddaney.cavm@gmail.com, linux-pci@vger.kernel.org, shijie.huang@arm.com, Tomasz Nowicki , mw@semihalf.com, andrea.gallo@linaro.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP In order to add ACPI support we need to isolate ACPI&DT common code and move DT logic to corresponding functions. To achieve this we are using firmware agnostic handle which can be unpacked to either DT or ACPI node. No functional changes other than a very minor one: 1. Terminate its_init call with -ENODEV for non-DT case which allows to remove hack from its-gic-v3.c. 2. Fix ITS base register address type (from 'unsigned long' to 'phys_addr_t'), as a bonus we get nice string formatting. 3. Since there is only one of ITS parent domain convert it to static global variable and drop the parameter from its_probe_one. Users can refer to it in more convenient way then. Signed-off-by: Hanjun Guo Signed-off-by: Tomasz Nowicki --- drivers/irqchip/irq-gic-v3-its.c | 65 ++++++++++++++++++++++---------------- drivers/irqchip/irq-gic-v3.c | 7 ++-- include/linux/irqchip/arm-gic-v3.h | 4 +-- 3 files changed, 42 insertions(+), 34 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 943442d..c7518c7 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -75,7 +75,7 @@ struct its_node { raw_spinlock_t lock; struct list_head entry; void __iomem *base; - unsigned long phys_base; + phys_addr_t phys_base; struct its_cmd_block *cmd_base; struct its_cmd_block *cmd_write; struct its_baser tables[GITS_BASER_NR_REGS]; @@ -115,6 +115,7 @@ struct its_device { static LIST_HEAD(its_nodes); static DEFINE_SPINLOCK(its_lock); static struct rdists *gic_rdists; +static struct irq_domain *its_parent; #define gic_data_rdist() (raw_cpu_ptr(gic_rdists->rdist)) #define gic_data_rdist_rd_base() (gic_data_rdist()->rd_base) @@ -1614,8 +1615,7 @@ static void its_enable_quirks(struct its_node *its) gic_enable_quirks(iidr, its_quirks, its); } -static int its_init_domain(struct device_node *node, struct its_node *its, - struct irq_domain *parent) +static int its_init_domain(struct fwnode_handle *handle, struct its_node *its) { struct irq_domain *inner_domain; struct msi_domain_info *info; @@ -1624,13 +1624,13 @@ static int its_init_domain(struct device_node *node, struct its_node *its, if (!info) return -ENOMEM; - inner_domain = irq_domain_add_tree(node, &its_domain_ops, its); + inner_domain = irq_domain_create_tree(handle, &its_domain_ops, its); if (!inner_domain) { kfree(info); return -ENOMEM; } - inner_domain->parent = parent; + inner_domain->parent = its_parent; inner_domain->bus_token = DOMAIN_BUS_NEXUS; info->ops = &its_msi_domain_ops; info->data = its; @@ -1639,43 +1639,35 @@ static int its_init_domain(struct device_node *node, struct its_node *its, return 0; } -static int __init its_probe(struct device_node *node, - struct irq_domain *parent) +static int __init its_probe_one(struct resource *res, + struct fwnode_handle *handle, int numa_node) { - struct resource res; struct its_node *its; void __iomem *its_base; u32 val; u64 baser, tmp; int err; - err = of_address_to_resource(node, 0, &res); - if (err) { - pr_warn("%s: no regs?\n", node->full_name); - return -ENXIO; - } - - its_base = ioremap(res.start, resource_size(&res)); + its_base = ioremap(res->start, resource_size(res)); if (!its_base) { - pr_warn("%s: unable to map registers\n", node->full_name); + pr_warn("ITS@%pa: Unable to map ITS registers\n", &res->start); return -ENOMEM; } val = readl_relaxed(its_base + GITS_PIDR2) & GIC_PIDR2_ARCH_MASK; if (val != 0x30 && val != 0x40) { - pr_warn("%s: no ITS detected, giving up\n", node->full_name); + pr_warn("ITS@%pa: No ITS detected, giving up\n", &res->start); err = -ENODEV; goto out_unmap; } err = its_force_quiescent(its_base); if (err) { - pr_warn("%s: failed to quiesce, giving up\n", - node->full_name); + pr_warn("ITS@%pa: Failed to quiesce, giving up\n", &res->start); goto out_unmap; } - pr_info("ITS: %s\n", node->full_name); + pr_info("ITS %pR\n", res); its = kzalloc(sizeof(*its), GFP_KERNEL); if (!its) { @@ -1687,9 +1679,9 @@ static int __init its_probe(struct device_node *node, INIT_LIST_HEAD(&its->entry); INIT_LIST_HEAD(&its->its_device_list); its->base = its_base; - its->phys_base = res.start; + its->phys_base = res->start; its->ite_size = ((readl_relaxed(its_base + GITS_TYPER) >> 4) & 0xf) + 1; - its->numa_node = of_node_to_nid(node); + its->numa_node = numa_node; its->cmd_base = kzalloc(ITS_CMD_QUEUE_SZ, GFP_KERNEL); if (!its->cmd_base) { @@ -1736,7 +1728,7 @@ static int __init its_probe(struct device_node *node, writeq_relaxed(0, its->base + GITS_CWRITER); writel_relaxed(GITS_CTLR_ENABLE, its->base + GITS_CTLR); - err = its_init_domain(node, its, parent); + err = its_init_domain(handle, its); if (err) goto out_free_tables; @@ -1754,7 +1746,7 @@ out_free_its: kfree(its); out_unmap: iounmap(its_base); - pr_err("ITS: failed probing %s (%d)\n", node->full_name, err); + pr_err("ITS@%pa: failed probing (%d)\n", &res->start, err); return err; } @@ -1782,10 +1774,10 @@ static struct of_device_id its_device_id[] = { {}, }; -int __init its_init(struct device_node *node, struct rdists *rdists, - struct irq_domain *parent_domain) +static int __init its_of_probe(struct device_node *node) { struct device_node *np; + struct resource res; for (np = of_find_matching_node(node, its_device_id); np; np = of_find_matching_node(np, its_device_id)) { @@ -1795,8 +1787,27 @@ int __init its_init(struct device_node *node, struct rdists *rdists, continue; } - its_probe(np, parent_domain); + if (of_address_to_resource(np, 0, &res)) { + pr_warn("%s: no regs?\n", np->full_name); + continue; + } + + its_probe_one(&res, &np->fwnode, of_node_to_nid(np)); } + return 0; +} + +int __init its_init(struct fwnode_handle *handle, struct rdists *rdists, + struct irq_domain *parent_domain) +{ + struct device_node *of_node; + + its_parent = parent_domain; + of_node = to_of_node(handle); + if (of_node) + its_of_probe(of_node); + else + return -ENODEV; if (list_empty(&its_nodes)) { pr_warn("ITS: No ITS available, not enabling LPIs\n"); diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index ede5672..1efc02a 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -910,7 +910,6 @@ static int __init gic_init_bases(void __iomem *dist_base, u64 redist_stride, struct fwnode_handle *handle) { - struct device_node *node; u32 typer; int gic_irqs; int err; @@ -951,10 +950,8 @@ static int __init gic_init_bases(void __iomem *dist_base, set_handle_irq(gic_handle_irq); - node = to_of_node(handle); - if (IS_ENABLED(CONFIG_ARM_GIC_V3_ITS) && gic_dist_supports_lpis() && - node) /* Temp hack to prevent ITS init for ACPI */ - its_init(node, &gic_data.rdists, gic_data.domain); + if (IS_ENABLED(CONFIG_ARM_GIC_V3_ITS) && gic_dist_supports_lpis()) + its_init(handle, &gic_data.rdists, gic_data.domain); gic_smp_init(); gic_dist_init(); diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h index 99ac022..8361c8d 100644 --- a/include/linux/irqchip/arm-gic-v3.h +++ b/include/linux/irqchip/arm-gic-v3.h @@ -430,9 +430,9 @@ struct rdists { }; struct irq_domain; -struct device_node; +struct fwnode_handle; int its_cpu_init(void); -int its_init(struct device_node *node, struct rdists *rdists, +int its_init(struct fwnode_handle *handle, struct rdists *rdists, struct irq_domain *domain); static inline bool gic_enable_sre(void)