From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755909AbaIKOJ5 (ORCPT ); Thu, 11 Sep 2014 10:09:57 -0400 Received: from mga01.intel.com ([192.55.52.88]:12864 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752400AbaIKOCD (ORCPT ); Thu, 11 Sep 2014 10:02:03 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,862,1389772800"; d="scan'208";a="384738306" From: Jiang Liu To: Benjamin Herrenschmidt , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , "Rafael J. Wysocki" , Bjorn Helgaas , Randy Dunlap , Yinghai Lu , Borislav Petkov , Grant Likely , Marc Zyngier Cc: Jiang Liu , Konrad Rzeszutek Wilk , Andrew Morton , Tony Luck , Joerg Roedel , Greg Kroah-Hartman , x86@kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [RFC Part2 v1 02/21] genirq: Introduce helper functions to support stacked irq_chip Date: Thu, 11 Sep 2014 22:03:29 +0800 Message-Id: <1410444228-3134-3-git-send-email-jiang.liu@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1410444228-3134-1-git-send-email-jiang.liu@linux.intel.com> References: <1410444228-3134-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now we already support hierarchy irq_datas, so introduce several helpers to support stacked irq_chips. Signed-off-by: Jiang Liu --- include/linux/irq.h | 5 +++++ kernel/irq/chip.c | 18 ++++++++++++++++++ 2 files changed, 23 insertions(+) diff --git a/include/linux/irq.h b/include/linux/irq.h index 4b74565690ce..bfa027f6814a 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -433,6 +433,11 @@ extern void handle_percpu_devid_irq(unsigned int irq, struct irq_desc *desc); extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc); extern void handle_nested_irq(unsigned int irq); +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY +extern void irq_chip_ack_parent(struct irq_data *data); +extern int irq_chip_retrigger_hierarchy(struct irq_data *data); +#endif + /* Handling of unhandled and spurious interrupts: */ extern void note_interrupt(unsigned int irq, struct irq_desc *desc, irqreturn_t action_ret); diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 46bd5e2190c3..b8ee27efde73 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -821,3 +821,21 @@ void irq_cpu_offline(void) raw_spin_unlock_irqrestore(&desc->lock, flags); } } + +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY +void irq_chip_ack_parent(struct irq_data *data) +{ + data = data->parent_data; + if (data && data->chip && data->chip->irq_ack) + data->chip->irq_ack(data); +} + +int irq_chip_retrigger_hierarchy(struct irq_data *data) +{ + for (data = data->parent_data; data; data = data->parent_data) + if (data->chip && data->chip->irq_retrigger) + return data->chip->irq_retrigger(data); + + return -ENOSYS; +} +#endif -- 1.7.10.4