From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jiang Liu Subject: [Patch Part1 v8 06/37] x86/htirq: Use new irqdomain interfaces to allocate/free IRQ Date: Mon, 13 Apr 2015 14:11:28 +0800 Message-ID: <1428905519-23704-7-git-send-email-jiang.liu@linux.intel.com> References: <1428905519-23704-1-git-send-email-jiang.liu@linux.intel.com> Return-path: Received: from mga03.intel.com ([134.134.136.65]:38723 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752583AbbDMGLA (ORCPT ); Mon, 13 Apr 2015 02:11:00 -0400 In-Reply-To: <1428905519-23704-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Bjorn Helgaas , Benjamin Herrenschmidt , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , "Rafael J. Wysocki" , Randy Dunlap , Yinghai Lu , Borislav Petkov , Dimitri Sivanich , x86@kernel.org, Jiang Liu Cc: Konrad Rzeszutek Wilk , David Cohen , Sander Eikelenboom , David Vrabel , Andrew Morton , Tony Luck , Joerg Roedel , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org Use new irqdomain interfaces to allocate/free IRQ for HTIRQ, so we could kill GENERIC_IRQ_LEGACY_ALLOC_HWIRQ later. This patch changes the interfaces between arch independent PCI driver and arch specific code. Currently HT_IRQ is only enabled on x86, so it shouldn't break other architectures. Signed-off-by: Jiang Liu Cc: Konrad Rzeszutek Wilk Cc: Tony Luck Cc: Joerg Roedel Cc: Greg Kroah-Hartman Cc: Bjorn Helgaas Cc: Benjamin Herrenschmidt Cc: Rafael J. Wysocki Cc: Randy Dunlap Cc: Yinghai Lu Cc: Borislav Petkov Link: http://lkml.kernel.org/r/1416894816-23245-7-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner --- arch/x86/kernel/apic/htirq.c | 26 +++++++++++++------------- drivers/pci/htirq.c | 7 +++---- include/linux/htirq.h | 2 ++ 3 files changed, 18 insertions(+), 17 deletions(-) diff --git a/arch/x86/kernel/apic/htirq.c b/arch/x86/kernel/apic/htirq.c index 816f36e979ad..b307ee7a7148 100644 --- a/arch/x86/kernel/apic/htirq.c +++ b/arch/x86/kernel/apic/htirq.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -61,31 +62,30 @@ static struct irq_chip ht_irq_chip = { .flags = IRQCHIP_SKIP_SET_WAKE, }; +int arch_alloc_ht_irq(struct pci_dev *dev) +{ + return irq_domain_alloc_irqs(NULL, 1, dev_to_node(&dev->dev), NULL); +} + +void arch_free_ht_irq(int irq) +{ + irq_domain_free_irqs(irq, 1); +} + int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev) { struct irq_cfg *cfg; struct ht_irq_msg msg; - unsigned dest; - int err; if (disable_apic) return -ENXIO; cfg = irq_cfg(irq); - err = assign_irq_vector(irq, cfg, apic->target_cpus()); - if (err) - return err; - - err = apic->cpu_mask_to_apicid_and(cfg->domain, - apic->target_cpus(), &dest); - if (err) - return err; - - msg.address_hi = HT_IRQ_HIGH_DEST_ID(dest); + msg.address_hi = HT_IRQ_HIGH_DEST_ID(cfg->dest_apicid); msg.address_lo = HT_IRQ_LOW_BASE | - HT_IRQ_LOW_DEST_ID(dest) | + HT_IRQ_LOW_DEST_ID(cfg->dest_apicid) | HT_IRQ_LOW_VECTOR(cfg->vector) | ((apic->irq_dest_mode == 0) ? HT_IRQ_LOW_DM_PHYSICAL : diff --git a/drivers/pci/htirq.c b/drivers/pci/htirq.c index a94dd2c4183a..ceb0ebeb7b5f 100644 --- a/drivers/pci/htirq.c +++ b/drivers/pci/htirq.c @@ -117,8 +117,8 @@ int __ht_create_irq(struct pci_dev *dev, int idx, ht_irq_update_t *update) cfg->msg.address_lo = 0xffffffff; cfg->msg.address_hi = 0xffffffff; - irq = irq_alloc_hwirq(dev_to_node(&dev->dev)); - if (!irq) { + irq = arch_alloc_ht_irq(dev); + if (irq <= 0) { kfree(cfg); return -EBUSY; } @@ -163,8 +163,7 @@ void ht_destroy_irq(unsigned int irq) cfg = irq_get_handler_data(irq); irq_set_chip(irq, NULL); irq_set_handler_data(irq, NULL); - irq_free_hwirq(irq); - + arch_free_ht_irq(irq); kfree(cfg); } EXPORT_SYMBOL(ht_destroy_irq); diff --git a/include/linux/htirq.h b/include/linux/htirq.h index 70a1dbbf2093..5caa51b7b95c 100644 --- a/include/linux/htirq.h +++ b/include/linux/htirq.h @@ -15,6 +15,8 @@ void unmask_ht_irq(struct irq_data *data); /* The arch hook for getting things started */ int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev); +int arch_alloc_ht_irq(struct pci_dev *dev); +void arch_free_ht_irq(int irq); /* For drivers of buggy hardware */ typedef void (ht_irq_update_t)(struct pci_dev *dev, int irq, -- 1.7.10.4