From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754028Ab1C0QUA (ORCPT ); Sun, 27 Mar 2011 12:20:00 -0400 Received: from hera.kernel.org ([140.211.167.34]:36157 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753809Ab1C0QT6 (ORCPT ); Sun, 27 Mar 2011 12:19:58 -0400 Date: Sun, 27 Mar 2011 16:19:49 GMT From: tip-bot for David Daney Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@redhat.com, ddaney@caviumnetworks.com, tglx@linutronix.de Reply-To: mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org, ddaney@caviumnetworks.com, tglx@linutronix.de In-Reply-To: <1301081931-11240-3-git-send-email-ddaney@caviumnetworks.com> References: <1301081931-11240-3-git-send-email-ddaney@caviumnetworks.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:irq/urgent] genirq: Add chip hooks for taking CPUs on/off line. Message-ID: Git-Commit-ID: 0fdb4b259ed3e91b687ac26848202f5e7c217e62 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.3 (hera.kernel.org [127.0.0.1]); Sun, 27 Mar 2011 16:19:50 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 0fdb4b259ed3e91b687ac26848202f5e7c217e62 Gitweb: http://git.kernel.org/tip/0fdb4b259ed3e91b687ac26848202f5e7c217e62 Author: David Daney AuthorDate: Fri, 25 Mar 2011 12:38:49 -0700 Committer: Thomas Gleixner CommitDate: Sun, 27 Mar 2011 17:45:58 +0200 genirq: Add chip hooks for taking CPUs on/off line. [ tglx: Removed the enabled argument as this is now available in irq_data ] Signed-off-by: David Daney Cc: linux-mips@linux-mips.org Cc: ralf@linux-mips.org LKML-Reference: <1301081931-11240-3-git-send-email-ddaney@caviumnetworks.com> Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 8 +++++++ kernel/irq/chip.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 66 insertions(+), 0 deletions(-) diff --git a/include/linux/irq.h b/include/linux/irq.h index 8649b0f..c2a0c19 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -279,6 +279,8 @@ static inline bool irqd_irq_disabled(struct irq_data *d) * @irq_set_wake: enable/disable power-management wake-on of an IRQ * @irq_bus_lock: function to lock access to slow bus (i2c) chips * @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips + * @irq_cpu_online: configure an interrupt source for a secondary CPU + * @irq_cpu_offline: un-configure an interrupt source for a secondary CPU * @irq_print_chip: optional to print special chip info in show_interrupts * @flags: chip specific flags * @@ -327,6 +329,9 @@ struct irq_chip { void (*irq_bus_lock)(struct irq_data *data); void (*irq_bus_sync_unlock)(struct irq_data *data); + void (*irq_cpu_online)(struct irq_data *data); + void (*irq_cpu_offline)(struct irq_data *data); + void (*irq_print_chip)(struct irq_data *data, struct seq_file *p); unsigned long flags; @@ -372,6 +377,9 @@ struct irqaction; extern int setup_irq(unsigned int irq, struct irqaction *new); extern void remove_irq(unsigned int irq, struct irqaction *act); +extern void irq_cpu_online(void); +extern void irq_cpu_offline(void); + #ifdef CONFIG_GENERIC_HARDIRQS #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ) diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 0a890bd..44b16a1 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -696,3 +696,61 @@ void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set) irq_put_desc_unlock(desc, flags); } + +/** + * irq_cpu_online - Invoke all irq_cpu_online functions. + * + * Iterate through all irqs and invoke the chip.irq_cpu_online() + * for each. + */ +void irq_cpu_online(void) +{ + struct irq_desc *desc; + struct irq_chip *chip; + unsigned long flags; + unsigned int irq; + + for_each_active_irq(irq) { + desc = irq_to_desc(irq); + if (!desc) + continue; + + raw_spin_lock_irqsave(&desc->lock, flags); + + chip = irq_data_get_irq_chip(&desc->irq_data); + + if (chip && chip->irq_cpu_online) + chip->irq_cpu_online(&desc->irq_data); + + raw_spin_unlock_irqrestore(&desc->lock, flags); + } +} + +/** + * irq_cpu_offline - Invoke all irq_cpu_offline functions. + * + * Iterate through all irqs and invoke the chip.irq_cpu_offline() + * for each. + */ +void irq_cpu_offline(void) +{ + struct irq_desc *desc; + struct irq_chip *chip; + unsigned long flags; + unsigned int irq; + + for_each_active_irq(irq) { + desc = irq_to_desc(irq); + if (!desc) + continue; + + raw_spin_lock_irqsave(&desc->lock, flags); + + chip = irq_data_get_irq_chip(&desc->irq_data); + + if (chip && chip->irq_cpu_offline) + chip->irq_cpu_offline(&desc->irq_data); + + raw_spin_unlock_irqrestore(&desc->lock, flags); + } +}