From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AC6F6C2D0E0 for ; Tue, 15 Sep 2020 08:43:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7395220771 for ; Tue, 15 Sep 2020 08:43:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726418AbgIOIns (ORCPT ); Tue, 15 Sep 2020 04:43:48 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:56516 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726400AbgIOInn (ORCPT ); Tue, 15 Sep 2020 04:43:43 -0400 Received: from DGGEMS412-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 5588C4068A3ED1F2C5ED; Tue, 15 Sep 2020 16:43:40 +0800 (CST) Received: from thunder-town.china.huawei.com (10.174.177.253) by DGGEMS412-HUB.china.huawei.com (10.3.19.212) with Microsoft SMTP Server id 14.3.487.0; Tue, 15 Sep 2020 16:43:31 +0800 From: Zhen Lei To: Thomas Gleixner , Jason Cooper , Marc Zyngier , Rob Herring , Guo Ren , devicetree , linux-csky , linux-kernel CC: Zhen Lei , Sebastian Hesselbarth , Haoyu Lv , Libin , Kefeng Wang , "Jianguo Chen" Subject: [PATCH v4 3/4] irqchip: dw-apb-ictl: support hierarchy irq domain Date: Tue, 15 Sep 2020 16:43:04 +0800 Message-ID: <20200915084305.3085-4-thunder.leizhen@huawei.com> X-Mailer: git-send-email 2.26.0.windows.1 In-Reply-To: <20200915084305.3085-1-thunder.leizhen@huawei.com> References: <20200915084305.3085-1-thunder.leizhen@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.174.177.253] X-CFilter-Loop: Reflected Sender: linux-csky-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-csky@vger.kernel.org Add support to use dw-apb-ictl as primary interrupt controller. Suggested-by: Marc Zyngier Signed-off-by: Zhen Lei Tested-by: Haoyu Lv --- drivers/irqchip/Kconfig | 2 +- drivers/irqchip/irq-dw-apb-ictl.c | 74 ++++++++++++++++++++++++++++++++++----- 2 files changed, 67 insertions(+), 9 deletions(-) diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index bfc9719dbcdc31c..7c2d1c8fa551a66 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -148,7 +148,7 @@ config DAVINCI_CP_INTC config DW_APB_ICTL bool select GENERIC_IRQ_CHIP - select IRQ_DOMAIN + select IRQ_DOMAIN_HIERARCHY config FARADAY_FTINTC010 bool diff --git a/drivers/irqchip/irq-dw-apb-ictl.c b/drivers/irqchip/irq-dw-apb-ictl.c index 5458004242e9d20..418183b9983dfad 100644 --- a/drivers/irqchip/irq-dw-apb-ictl.c +++ b/drivers/irqchip/irq-dw-apb-ictl.c @@ -17,6 +17,7 @@ #include #include #include +#include #define APB_INT_ENABLE_L 0x00 #define APB_INT_ENABLE_H 0x04 @@ -26,6 +27,27 @@ #define APB_INT_FINALSTATUS_H 0x34 #define APB_INT_BASE_OFFSET 0x04 +/* irq domain of the primary interrupt controller. */ +static struct irq_domain *dw_apb_ictl_irq_domain; + +static void __irq_entry dw_apb_ictl_handle_irq(struct pt_regs *regs) +{ + struct irq_domain *d = dw_apb_ictl_irq_domain; + int n; + + for (n = 0; n < d->revmap_size; n += 32) { + struct irq_chip_generic *gc = irq_get_domain_generic_chip(d, n); + u32 stat = readl_relaxed(gc->reg_base + APB_INT_FINALSTATUS_L); + + while (stat) { + u32 hwirq = ffs(stat) - 1; + + handle_domain_irq(d, hwirq, regs); + stat &= ~BIT(hwirq); + } + } +} + static void dw_apb_ictl_handle_irq_cascaded(struct irq_desc *desc) { struct irq_domain *d = irq_desc_get_handler_data(desc); @@ -50,6 +72,30 @@ static void dw_apb_ictl_handle_irq_cascaded(struct irq_desc *desc) chained_irq_exit(chip, desc); } +static int dw_apb_ictl_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *arg) +{ + int i, ret; + irq_hw_number_t hwirq; + unsigned int type = IRQ_TYPE_NONE; + struct irq_fwspec *fwspec = arg; + + ret = irq_domain_translate_onecell(domain, fwspec, &hwirq, &type); + if (ret) + return ret; + + for (i = 0; i < nr_irqs; i++) + irq_map_generic_chip(domain, virq + i, hwirq + i); + + return 0; +} + +static const struct irq_domain_ops dw_apb_ictl_irq_domain_ops = { + .translate = irq_domain_translate_onecell, + .alloc = dw_apb_ictl_irq_domain_alloc, + .free = irq_domain_free_irqs_top, +}; + #ifdef CONFIG_PM static void dw_apb_ictl_resume(struct irq_data *d) { @@ -75,13 +121,20 @@ static int __init dw_apb_ictl_init(struct device_node *np, void __iomem *iobase; int ret, nrirqs, parent_irq, i; u32 reg; - const struct irq_domain_ops *domain_ops = &irq_generic_chip_ops; - - /* Map the parent interrupt for the chained handler */ - parent_irq = irq_of_parse_and_map(np, 0); - if (parent_irq <= 0) { - pr_err("%pOF: unable to parse irq\n", np); - return -EINVAL; + const struct irq_domain_ops *domain_ops; + + if (!parent || (np == parent)) { + /* It's used as the primary interrupt controller */ + parent_irq = 0; + domain_ops = &dw_apb_ictl_irq_domain_ops; + } else { + /* Map the parent interrupt for the chained handler */ + parent_irq = irq_of_parse_and_map(np, 0); + if (parent_irq <= 0) { + pr_err("%pOF: unable to parse irq\n", np); + return -EINVAL; + } + domain_ops = &irq_generic_chip_ops; } ret = of_address_to_resource(np, 0, &r); @@ -146,8 +199,13 @@ static int __init dw_apb_ictl_init(struct device_node *np, gc->chip_types[0].chip.irq_resume = dw_apb_ictl_resume; } - irq_set_chained_handler_and_data(parent_irq, + if (parent_irq) { + irq_set_chained_handler_and_data(parent_irq, dw_apb_ictl_handle_irq_cascaded, domain); + } else { + dw_apb_ictl_irq_domain = domain; + set_handle_irq(dw_apb_ictl_handle_irq); + } return 0; -- 1.8.3