From patchwork Mon Jun 13 14:41:10 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomasz Nowicki X-Patchwork-Id: 9173243 X-Patchwork-Delegate: bhelgaas@google.com 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 759526086B for ; Mon, 13 Jun 2016 14:42:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6732120499 for ; Mon, 13 Jun 2016 14:42:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5BDE927D0E; Mon, 13 Jun 2016 14:42:27 +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=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5DB2027B13 for ; Mon, 13 Jun 2016 14:42:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1424299AbcFMOl7 (ORCPT ); Mon, 13 Jun 2016 10:41:59 -0400 Received: from mail-lf0-f41.google.com ([209.85.215.41]:35381 "EHLO mail-lf0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1424293AbcFMOlx (ORCPT ); Mon, 13 Jun 2016 10:41:53 -0400 Received: by mail-lf0-f41.google.com with SMTP id u74so85932494lff.2 for ; Mon, 13 Jun 2016 07:41:52 -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=6maMlqdiSmrvyMatLYyHsCFv61X2NypbZ0ipx55DAPM=; b=o3uxYuwrEbnCoz8Lvm7S0rXRyUkdb8PY+IkoUcu785BMQupG8qxR2jncFYcI2fC8iQ yVhsQ5hDKfW4UGihm/y27I6yaFQd+TTc86baWwLSKTm57I/2RFRgSq3F2PlWhO1uMLvZ 0S74M2kIPw408JDX2uq7/oLSCs4jGnnlvu5GJTJ9/rW2NsKOeYv6K5nLVSHIodXymDrv c3KB/OgNBFFON26rnRT9sFfNVusduLOnNS1s9BjoC8kUKjy3kuHzvZ9mUA9Sx7dG0Trf yYmt2N/4lZuRUB9/yfI6NpLOX7preu+ixYcoF5bYAh4inQewk/7dUkMdwJoJahT3r09a vD0w== 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=6maMlqdiSmrvyMatLYyHsCFv61X2NypbZ0ipx55DAPM=; b=GmVv+mXyLSzG67ehSDSZGsAZi6NMLehv1Hj/xwr17ovH4oLXLSBOMLdg/u8v8bLSIf fwNoe8RorP5zfZF7o3e9+Z7Nm1evad5eEaYMRB4acHDDXB1vgYjI/QHAYVlkvvCoZoq0 0h83zIlCJ5fSf6BN7FApai4U6oa3p27q1U7LxHC2mJBJrf2ytvNCSqcmJe33hqgWZij+ ws4KcREQdWJk1WIW+SZw1WdwFq74UAakw/+SBTbx6HsXJNE5X856IQJd/CgS0k9Yano7 qheSbnr6e1cfVQrOuq8iQxAVQ0PjWOgGiptWfsJDNQQd4f5s6jRNCUa+z1Tixy0DdRXH CRNQ== X-Gm-Message-State: ALyK8tJPDxo3WJ7gCd23s2NjlsgdHqud4T4vmsh5MUqFbobgMQtmM2yiPGzK/mn9be1uSA== X-Received: by 10.25.211.81 with SMTP id k78mr336094lfg.178.1465828911598; Mon, 13 Jun 2016 07:41:51 -0700 (PDT) Received: from tn-HP-4.semihalf.local (31-172-191-173.noc.fibertech.net.pl. [31.172.191.173]) by smtp.gmail.com with ESMTPSA id l79sm394242lfi.40.2016.06.13.07.41.49 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 13 Jun 2016 07:41:50 -0700 (PDT) From: Tomasz Nowicki To: marc.zyngier@arm.com, tglx@linutronix.de, jason@lakedaemon.net, rjw@rjwysocki.net, bhelgaas@google.com, lorenzo.pieralisi@arm.com, robert.richter@caviumnetworks.com, shijie.huang@arm.com, Suravee.Suthikulpanit@amd.com, hanjun.guo@linaro.org Cc: al.stone@linaro.org, mw@semihalf.com, graeme.gregory@linaro.org, Catalin.Marinas@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, ddaney.cavm@gmail.com, okaya@codeaurora.org, andrea.gallo@linaro.org, linux-pci@vger.kernel.org, Tomasz Nowicki Subject: [PATCH V6 4/7] irqchip/gicv3-its: Refator ITS DT init code to prepare for ACPI Date: Mon, 13 Jun 2016 16:41:10 +0200 Message-Id: <1465828873-23498-5-git-send-email-tn@semihalf.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1465828873-23498-1-git-send-email-tn@semihalf.com> References: <1465828873-23498-1-git-send-email-tn@semihalf.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.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. Fix ITS base register address type (from 'unsigned long' to 'phys_addr_t'), as a bonus we get nice string formatting. 2. 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 | 79 +++++++++++++++++++++----------------- drivers/irqchip/irq-gic-v3.c | 6 +-- include/linux/irqchip/arm-gic-v3.h | 4 +- 3 files changed, 48 insertions(+), 41 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 43d32fc..f033fd8 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -74,7 +74,7 @@ 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]; @@ -114,6 +114,7 @@ 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) @@ -837,7 +838,7 @@ static void its_free_tables(struct its_node *its) } } -static int its_alloc_tables(const char *node_name, struct its_node *its) +static int its_alloc_tables(struct its_node *its) { int err; int i; @@ -893,8 +894,8 @@ static int its_alloc_tables(const char *node_name, struct its_node *its) order); if (order >= MAX_ORDER) { order = MAX_ORDER - 1; - pr_warn("%s: Device Table too large, reduce its page order to %u\n", - node_name, order); + pr_warn("ITS@%pa: Device Table too large, reduce its page order to %u\n", + &its->phys_base, order); } } @@ -903,8 +904,8 @@ retry_alloc_baser: if (alloc_pages > GITS_BASER_PAGES_MAX) { alloc_pages = GITS_BASER_PAGES_MAX; order = get_order(GITS_BASER_PAGES_MAX * psz); - pr_warn("%s: Device Table too large, reduce its page order to %u (%u pages)\n", - node_name, order, alloc_pages); + pr_warn("ITS@%pa: Device Table too large, reduce its page order to %u (%u pages)\n", + &its->phys_base, order, alloc_pages); } base = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, order); @@ -978,8 +979,8 @@ retry_baser: } if (val != tmp) { - pr_err("ITS: %s: GITS_BASER%d doesn't stick: %lx %lx\n", - node_name, i, + pr_err("ITS@%pa: GITS_BASER%d doesn't stick: %lx %lx\n", + &its->phys_base, i, (unsigned long) val, (unsigned long) tmp); err = -ENXIO; goto out_free; @@ -1507,8 +1508,7 @@ 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; @@ -1517,13 +1517,13 @@ 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; @@ -1532,43 +1532,35 @@ 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@%pa\n", &res->start); its = kzalloc(sizeof(*its), GFP_KERNEL); if (!its) { @@ -1580,9 +1572,9 @@ 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) { @@ -1593,7 +1585,7 @@ static int __init its_probe(struct device_node *node, its_enable_quirks(its); - err = its_alloc_tables(node->full_name, its); + err = its_alloc_tables(its); if (err) goto out_free_cmd; @@ -1629,7 +1621,7 @@ 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; @@ -1647,7 +1639,7 @@ 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; } @@ -1675,10 +1667,10 @@ 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)) { @@ -1688,8 +1680,25 @@ 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); 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 2c5ba0e..019b442 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -911,7 +911,6 @@ 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; @@ -952,10 +951,9 @@ 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); + to_of_node(handle)) /* Temp hack to prevent ITS init for ACPI */ + 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 dc493e0..2136639 100644 --- a/include/linux/irqchip/arm-gic-v3.h +++ b/include/linux/irqchip/arm-gic-v3.h @@ -334,9 +334,9 @@ 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)