From patchwork Wed Mar 9 19:21:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hector Martin X-Patchwork-Id: 12775501 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8F1F4C433F5 for ; Wed, 9 Mar 2022 19:24:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=oa/NjAO8Op8JOSOryY/NglouJttDTHWiL8pcckSDH/E=; b=FBnbYHoLGKIED6 smOkCgPrYyvQAmVous6PNpjIeBrlGaCPvILy4Yfqi6+vQzMH6DgGC6eiT8JzQYFI3B08dmE8cPXGO 5HtLn1nwlv0GmL9gvBIpuuGRcFRKeS9o+cAYaVqEirgFtMYNt++OU5QFVkIXllgbVUF84swwpGcmo AmWVyhMNLRRNaeGw14SkbtteHb7tDBzYcGxyRzfx79tevbwt73bcjAYzoB+lv+8NMW5tAgcvpnVNZ eMrUWpAwtvm8YShTKmcCnL5l7K9UTWIvDfZbBF5ZZ8/BDuZujMMvIMBhVKaCzqeqDUdfpIioI33yt YRoUQ0ZMC/pm7qC3cH0A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nS1ti-00AEqD-Pn; Wed, 09 Mar 2022 19:22:58 +0000 Received: from marcansoft.com ([212.63.210.85] helo=mail.marcansoft.com) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nS1t3-00AEYA-9x for linux-arm-kernel@lists.infradead.org; Wed, 09 Mar 2022 19:22:19 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: hector@marcansoft.com) by mail.marcansoft.com (Postfix) with ESMTPSA id EBEED425EA; Wed, 9 Mar 2022 19:22:12 +0000 (UTC) From: Hector Martin To: Thomas Gleixner , Marc Zyngier , Rob Herring Cc: Hector Martin , Sven Peter , Alyssa Rosenzweig , Mark Kettenis , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v3 4/7] irqchip/apple-aic: Switch to irq_domain_create_tree and sparse hwirqs Date: Thu, 10 Mar 2022 04:21:20 +0900 Message-Id: <20220309192123.152028-5-marcan@marcan.st> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20220309192123.152028-1-marcan@marcan.st> References: <20220309192123.152028-1-marcan@marcan.st> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220309_112217_527214_827932EC X-CRM114-Status: GOOD ( 21.46 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This allows us to directly use the hardware event number as the hwirq number. Since IRQ events have bit 16 set (type=1), FIQs now move to starting at hwirq number 0. This will become more important once multi-die support is introduced in a later commit. Signed-off-by: Hector Martin --- drivers/irqchip/irq-apple-aic.c | 71 ++++++++++++++++++--------------- 1 file changed, 39 insertions(+), 32 deletions(-) diff --git a/drivers/irqchip/irq-apple-aic.c b/drivers/irqchip/irq-apple-aic.c index 613e0ebdabdc..96480389195d 100644 --- a/drivers/irqchip/irq-apple-aic.c +++ b/drivers/irqchip/irq-apple-aic.c @@ -68,7 +68,7 @@ */ #define AIC_INFO 0x0004 -#define AIC_INFO_NR_HW GENMASK(15, 0) +#define AIC_INFO_NR_IRQ GENMASK(15, 0) #define AIC_CONFIG 0x0010 @@ -77,7 +77,8 @@ #define AIC_EVENT_TYPE GENMASK(31, 16) #define AIC_EVENT_NUM GENMASK(15, 0) -#define AIC_EVENT_TYPE_HW 1 +#define AIC_EVENT_TYPE_FIQ 0 /* Software use */ +#define AIC_EVENT_TYPE_IRQ 1 #define AIC_EVENT_TYPE_IPI 4 #define AIC_EVENT_IPI_OTHER 1 #define AIC_EVENT_IPI_SELF 2 @@ -160,6 +161,11 @@ #define MPIDR_CPU(x) MPIDR_AFFINITY_LEVEL(x, 0) #define MPIDR_CLUSTER(x) MPIDR_AFFINITY_LEVEL(x, 1) +#define AIC_IRQ_HWIRQ(x) (FIELD_PREP(AIC_EVENT_TYPE, AIC_EVENT_TYPE_IRQ) | \ + FIELD_PREP(AIC_EVENT_NUM, x)) +#define AIC_FIQ_HWIRQ(x) (FIELD_PREP(AIC_EVENT_TYPE, AIC_EVENT_TYPE_FIQ) | \ + FIELD_PREP(AIC_EVENT_NUM, x)) +#define AIC_HWIRQ_IRQ(x) FIELD_GET(AIC_EVENT_NUM, x) #define AIC_NR_FIQ 4 #define AIC_NR_SWIPI 32 @@ -213,7 +219,7 @@ struct aic_irq_chip { void __iomem *base; struct irq_domain *hw_domain; struct irq_domain *ipi_domain; - int nr_hw; + int nr_irq; struct aic_info info; }; @@ -243,18 +249,22 @@ static void aic_ic_write(struct aic_irq_chip *ic, u32 reg, u32 val) static void aic_irq_mask(struct irq_data *d) { + irq_hw_number_t hwirq = irqd_to_hwirq(d); struct aic_irq_chip *ic = irq_data_get_irq_chip_data(d); - aic_ic_write(ic, AIC_MASK_SET + MASK_REG(irqd_to_hwirq(d)), - MASK_BIT(irqd_to_hwirq(d))); + u32 irq = AIC_HWIRQ_IRQ(hwirq); + + aic_ic_write(ic, AIC_MASK_SET + MASK_REG(irq), MASK_BIT(irq)); } static void aic_irq_unmask(struct irq_data *d) { + irq_hw_number_t hwirq = irqd_to_hwirq(d); struct aic_irq_chip *ic = irq_data_get_irq_chip_data(d); - aic_ic_write(ic, AIC_MASK_CLR + MASK_REG(d->hwirq), - MASK_BIT(irqd_to_hwirq(d))); + u32 irq = AIC_HWIRQ_IRQ(hwirq); + + aic_ic_write(ic, AIC_MASK_CLR + MASK_REG(irq), MASK_BIT(irq)); } static void aic_irq_eoi(struct irq_data *d) @@ -281,8 +291,8 @@ static void __exception_irq_entry aic_handle_irq(struct pt_regs *regs) type = FIELD_GET(AIC_EVENT_TYPE, event); irq = FIELD_GET(AIC_EVENT_NUM, event); - if (type == AIC_EVENT_TYPE_HW) - generic_handle_domain_irq(aic_irqc->hw_domain, irq); + if (type == AIC_EVENT_TYPE_IRQ) + generic_handle_domain_irq(aic_irqc->hw_domain, event); else if (type == AIC_EVENT_TYPE_IPI && irq == 1) aic_handle_ipi(regs); else if (event != 0) @@ -314,7 +324,7 @@ static int aic_irq_set_affinity(struct irq_data *d, else cpu = cpumask_any_and(mask_val, cpu_online_mask); - aic_ic_write(ic, AIC_TARGET_CPU + hwirq * 4, BIT(cpu)); + aic_ic_write(ic, AIC_TARGET_CPU + AIC_HWIRQ_IRQ(hwirq) * 4, BIT(cpu)); irq_data_update_effective_affinity(d, cpumask_of(cpu)); return IRQ_SET_MASK_OK; @@ -344,9 +354,7 @@ static struct irq_chip aic_chip = { static unsigned long aic_fiq_get_idx(struct irq_data *d) { - struct aic_irq_chip *ic = irq_data_get_irq_chip_data(d); - - return irqd_to_hwirq(d) - ic->nr_hw; + return AIC_HWIRQ_IRQ(irqd_to_hwirq(d)); } static void aic_fiq_set_mask(struct irq_data *d) @@ -434,11 +442,11 @@ static void __exception_irq_entry aic_handle_fiq(struct pt_regs *regs) if (TIMER_FIRING(read_sysreg(cntp_ctl_el0))) generic_handle_domain_irq(aic_irqc->hw_domain, - aic_irqc->nr_hw + AIC_TMR_EL0_PHYS); + AIC_FIQ_HWIRQ(AIC_TMR_EL0_PHYS)); if (TIMER_FIRING(read_sysreg(cntv_ctl_el0))) generic_handle_domain_irq(aic_irqc->hw_domain, - aic_irqc->nr_hw + AIC_TMR_EL0_VIRT); + AIC_FIQ_HWIRQ(AIC_TMR_EL0_VIRT)); if (is_kernel_in_hyp_mode()) { uint64_t enabled = read_sysreg_s(SYS_IMP_APL_VM_TMR_FIQ_ENA_EL2); @@ -446,12 +454,12 @@ static void __exception_irq_entry aic_handle_fiq(struct pt_regs *regs) if ((enabled & VM_TMR_FIQ_ENABLE_P) && TIMER_FIRING(read_sysreg_s(SYS_CNTP_CTL_EL02))) generic_handle_domain_irq(aic_irqc->hw_domain, - aic_irqc->nr_hw + AIC_TMR_EL02_PHYS); + AIC_FIQ_HWIRQ(AIC_TMR_EL02_PHYS)); if ((enabled & VM_TMR_FIQ_ENABLE_V) && TIMER_FIRING(read_sysreg_s(SYS_CNTV_CTL_EL02))) generic_handle_domain_irq(aic_irqc->hw_domain, - aic_irqc->nr_hw + AIC_TMR_EL02_VIRT); + AIC_FIQ_HWIRQ(AIC_TMR_EL02_VIRT)); } if ((read_sysreg_s(SYS_IMP_APL_PMCR0_EL1) & (PMCR0_IMODE | PMCR0_IACT)) == @@ -496,9 +504,9 @@ static struct irq_chip fiq_chip = { static int aic_irq_domain_map(struct irq_domain *id, unsigned int irq, irq_hw_number_t hw) { - struct aic_irq_chip *ic = id->host_data; + u32 type = FIELD_GET(AIC_EVENT_TYPE, hw); - if (hw < ic->nr_hw) { + if (type == AIC_EVENT_TYPE_IRQ) { irq_domain_set_info(id, irq, hw, &aic_chip, id->host_data, handle_fasteoi_irq, NULL, NULL); irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(irq))); @@ -523,14 +531,14 @@ static int aic_irq_domain_translate(struct irq_domain *id, switch (fwspec->param[0]) { case AIC_IRQ: - if (fwspec->param[1] >= ic->nr_hw) + if (fwspec->param[1] >= ic->nr_irq) return -EINVAL; - *hwirq = fwspec->param[1]; + *hwirq = AIC_IRQ_HWIRQ(fwspec->param[1]); break; case AIC_FIQ: if (fwspec->param[1] >= AIC_NR_FIQ) return -EINVAL; - *hwirq = ic->nr_hw + fwspec->param[1]; + *hwirq = AIC_FIQ_HWIRQ(fwspec->param[1]); /* * In EL1 the non-redirected registers are the guest's, @@ -539,10 +547,10 @@ static int aic_irq_domain_translate(struct irq_domain *id, if (!is_kernel_in_hyp_mode()) { switch (fwspec->param[1]) { case AIC_TMR_GUEST_PHYS: - *hwirq = ic->nr_hw + AIC_TMR_EL0_PHYS; + *hwirq = AIC_FIQ_HWIRQ(AIC_TMR_EL0_PHYS); break; case AIC_TMR_GUEST_VIRT: - *hwirq = ic->nr_hw + AIC_TMR_EL0_VIRT; + *hwirq = AIC_FIQ_HWIRQ(AIC_TMR_EL0_VIRT); break; case AIC_TMR_HV_PHYS: case AIC_TMR_HV_VIRT: @@ -900,16 +908,15 @@ static int __init aic_of_ic_init(struct device_node *node, struct device_node *p aic_irqc = irqc; info = aic_ic_read(irqc, AIC_INFO); - irqc->nr_hw = FIELD_GET(AIC_INFO_NR_HW, info); + irqc->nr_irq = FIELD_GET(AIC_INFO_NR_IRQ, info); if (irqc->info.fast_ipi) static_branch_enable(&use_fast_ipi); else static_branch_disable(&use_fast_ipi); - irqc->hw_domain = irq_domain_create_linear(of_node_to_fwnode(node), - irqc->nr_hw + AIC_NR_FIQ, - &aic_irq_domain_ops, irqc); + irqc->hw_domain = irq_domain_create_tree(of_node_to_fwnode(node), + &aic_irq_domain_ops, irqc); if (WARN_ON(!irqc->hw_domain)) { iounmap(irqc->base); kfree(irqc); @@ -928,11 +935,11 @@ static int __init aic_of_ic_init(struct device_node *node, struct device_node *p set_handle_irq(aic_handle_irq); set_handle_fiq(aic_handle_fiq); - for (i = 0; i < BITS_TO_U32(irqc->nr_hw); i++) + for (i = 0; i < BITS_TO_U32(irqc->nr_irq); i++) aic_ic_write(irqc, AIC_MASK_SET + i * 4, U32_MAX); - for (i = 0; i < BITS_TO_U32(irqc->nr_hw); i++) + for (i = 0; i < BITS_TO_U32(irqc->nr_irq); i++) aic_ic_write(irqc, AIC_SW_CLR + i * 4, U32_MAX); - for (i = 0; i < irqc->nr_hw; i++) + for (i = 0; i < irqc->nr_irq; i++) aic_ic_write(irqc, AIC_TARGET_CPU + i * 4, 1); if (!is_kernel_in_hyp_mode()) @@ -948,7 +955,7 @@ static int __init aic_of_ic_init(struct device_node *node, struct device_node *p vgic_set_kvm_info(&vgic_info); pr_info("Initialized with %d IRQs, %d FIQs, %d vIPIs\n", - irqc->nr_hw, AIC_NR_FIQ, AIC_NR_SWIPI); + irqc->nr_irq, AIC_NR_FIQ, AIC_NR_SWIPI); return 0; }