[1/2] irq: move some interrupt arch_* functions into struct irq_chip.

Message ID	4BA3CA3E.7010207@kernel.org (mailing list archive)
State	Superseded
Headers	show Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o2JJ4Gpc016118 for <patchwork-sh@patchwork.kernel.org>; Fri, 19 Mar 2010 19:04:16 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750968Ab0CSTEP (ORCPT <rfc822;patchwork-sh@patchwork.kernel.org>); Fri, 19 Mar 2010 15:04:15 -0400 Received: from hera.kernel.org ([140.211.167.34]:34439 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750856Ab0CSTEO (ORCPT <rfc822;linux-sh@vger.kernel.org>); Fri, 19 Mar 2010 15:04:14 -0400 Received: from [10.6.76.26] (sca-ea-fw-1.Sun.COM [192.18.43.225]) (authenticated bits=0) by hera.kernel.org (8.14.3/8.14.3) with ESMTP id o2JJ3J2n017808 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO); Fri, 19 Mar 2010 19:03:24 GMT X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.95.2 at hera.kernel.org Message-ID: <4BA3CA3E.7010207@kernel.org> Date: Fri, 19 Mar 2010 12:02:22 -0700 From: Yinghai Lu <yinghai@kernel.org> User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.8) Gecko/20100228 SUSE/3.0.3-1.1.1 Thunderbird/3.0.3 MIME-Version: 1.0 To: Ian Campbell <ian.campbell@citrix.com> CC: linux-kernel@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>, "Eric W. Biederman" <ebiederm@xmission.com>, Jeremy Fitzhardinge <jeremy@goop.org>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, x86@kernel.org, linuxppc-dev@ozlabs.org, Rusty Russell <rusty@rustcorp.com.au>, lguest@ozlabs.org, Paul Mundt <lethal@linux-sh.org>, linux-sh@vger.kernel.org Subject: Re: [PATCH 1/2] irq: move some interrupt arch_* functions into struct irq_chip. References: <1268998032.10129.44653.camel@zakaz.uk.xensource.com> <1268998041-22707-1-git-send-email-ian.campbell@citrix.com> In-Reply-To: <1268998041-22707-1-git-send-email-ian.campbell@citrix.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: <linux-sh.vger.kernel.org> X-Mailing-List: linux-sh@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Fri, 19 Mar 2010 19:04:16 +0000 (UTC)

Index: linux-2.6/arch/powerpc/kernel/irq.c =================================================================== --- linux-2.6.orig/arch/powerpc/kernel/irq.c +++ linux-2.6/arch/powerpc/kernel/irq.c @@ -1088,7 +1088,7 @@ int arch_early_irq_init(void) return 0; } -int arch_init_chip_data(struct irq_desc *desc, int node) +int arch_init_irq_desc(struct irq_desc *desc, int node, init_chip_data_fn fn) { desc->status |= IRQ_NOREQUEST; return 0; Index: linux-2.6/arch/x86/include/asm/hw_irq.h =================================================================== --- linux-2.6.orig/arch/x86/include/asm/hw_irq.h +++ linux-2.6/arch/x86/include/asm/hw_irq.h @@ -20,9 +20,9 @@ #include <linux/percpu.h> #include <linux/profile.h> #include <linux/smp.h> +#include <linux/irq.h> #include <asm/atomic.h> -#include <asm/irq.h> #include <asm/sections.h> /* Interrupt handlers registered during init_IRQ */ @@ -61,6 +61,11 @@ extern void init_VISWS_APIC_irqs(void); extern void setup_IO_APIC(void); extern void disable_IO_APIC(void); +extern void x86_copy_chip_data(struct irq_desc *old_desc, + struct irq_desc *desc, int node); +extern void x86_free_chip_data(struct irq_desc *old_desc, + struct irq_desc *desc); + struct io_apic_irq_attr { int ioapic; int ioapic_pin; Index: linux-2.6/arch/x86/kernel/apic/io_apic.c =================================================================== --- linux-2.6.orig/arch/x86/kernel/apic/io_apic.c +++ linux-2.6/arch/x86/kernel/apic/io_apic.c @@ -211,7 +211,7 @@ static struct irq_cfg *get_one_free_irq_ return cfg; } -int arch_init_chip_data(struct irq_desc *desc, int node) +static int x86_init_chip_data(struct irq_desc *desc, int node) { struct irq_cfg *cfg; @@ -287,8 +287,8 @@ static void free_irq_2_pin(struct irq_cf old_cfg->irq_2_pin = NULL; } -void arch_init_copy_chip_data(struct irq_desc *old_desc, - struct irq_desc *desc, int node) +void x86_copy_chip_data(struct irq_desc *old_desc, + struct irq_desc *desc, int node) { struct irq_cfg *cfg; struct irq_cfg *old_cfg; @@ -312,7 +312,7 @@ static void free_irq_cfg(struct irq_cfg kfree(old_cfg); } -void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc) +void x86_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc) { struct irq_cfg *old_cfg, *cfg; @@ -329,6 +329,14 @@ void arch_free_chip_data(struct irq_desc } } /* end for move_irq_desc */ +int arch_init_irq_desc(struct irq_desc *desc, int node, + init_chip_data_fn init_chip_data) +{ + if (!init_chip_data) + return x86_init_chip_data(desc, node); + + return init_chip_data(desc, node); +} #else struct irq_cfg *irq_cfg(unsigned int irq) @@ -336,6 +344,15 @@ struct irq_cfg *irq_cfg(unsigned int irq return irq < nr_irqs ? irq_cfgx + irq : NULL; } +void x86_copy_chip_data(struct irq_desc *old_desc, + struct irq_desc *desc, int node) +{ +} + +void x86_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc) +{ +} + #endif struct io_apic { @@ -2747,6 +2764,9 @@ static struct irq_chip ioapic_chip __rea .set_affinity = set_ioapic_affinity_irq, #endif .retrigger = ioapic_retrigger_irq, + + .copy_chip_data = x86_copy_chip_data, + .free_chip_data = x86_free_chip_data, }; static struct irq_chip ir_ioapic_chip __read_mostly = { @@ -2762,6 +2782,9 @@ static struct irq_chip ir_ioapic_chip __ #endif #endif .retrigger = ioapic_retrigger_irq, + + .copy_chip_data = x86_copy_chip_data, + .free_chip_data = x86_free_chip_data, }; static inline void init_IO_APIC_traps(void) @@ -3474,6 +3497,9 @@ static struct irq_chip msi_chip = { .set_affinity = set_msi_irq_affinity, #endif .retrigger = ioapic_retrigger_irq, + + .copy_chip_data = x86_copy_chip_data, + .free_chip_data = x86_free_chip_data, }; static struct irq_chip msi_ir_chip = { @@ -3487,6 +3513,9 @@ static struct irq_chip msi_ir_chip = { #endif #endif .retrigger = ioapic_retrigger_irq, + + .copy_chip_data = x86_copy_chip_data, + .free_chip_data = x86_free_chip_data, }; /* @@ -3646,6 +3675,9 @@ static struct irq_chip dmar_msi_type = { .set_affinity = dmar_msi_set_affinity, #endif .retrigger = ioapic_retrigger_irq, + + .copy_chip_data = x86_copy_chip_data, + .free_chip_data = x86_free_chip_data, }; int arch_setup_dmar_msi(unsigned int irq) @@ -3703,6 +3735,9 @@ static struct irq_chip ir_hpet_msi_type #endif #endif .retrigger = ioapic_retrigger_irq, + + .copy_chip_data = x86_copy_chip_data, + .free_chip_data = x86_free_chip_data, }; static struct irq_chip hpet_msi_type = { @@ -3714,6 +3749,9 @@ static struct irq_chip hpet_msi_type = { .set_affinity = hpet_msi_set_affinity, #endif .retrigger = ioapic_retrigger_irq, + + .copy_chip_data = x86_copy_chip_data, + .free_chip_data = x86_free_chip_data, }; int arch_setup_hpet_msi(unsigned int irq, unsigned int id) @@ -3800,6 +3838,9 @@ static struct irq_chip ht_irq_chip = { .set_affinity = set_ht_irq_affinity, #endif .retrigger = ioapic_retrigger_irq, + + .copy_chip_data = x86_copy_chip_data, + .free_chip_data = x86_free_chip_data, }; int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev) Index: linux-2.6/arch/x86/kernel/uv_irq.c =================================================================== --- linux-2.6.orig/arch/x86/kernel/uv_irq.c +++ linux-2.6/arch/x86/kernel/uv_irq.c @@ -55,6 +55,9 @@ struct irq_chip uv_irq_chip = { .eoi = uv_ack_apic, .end = uv_noop, .set_affinity = uv_set_irq_affinity, + + .copy_chip_data = x86_copy_chip_data, + .free_chip_data = x86_free_chip_data, }; /* Index: linux-2.6/drivers/xen/events.c =================================================================== --- linux-2.6.orig/drivers/xen/events.c +++ linux-2.6/drivers/xen/events.c @@ -329,6 +329,11 @@ static void unmask_evtchn(int port) put_cpu(); } +static int xen_init_chip_data(struct irq_desc *desc, int node) +{ + return 0; +} + static int find_unbound_irq(void) { int irq; @@ -341,7 +346,7 @@ static int find_unbound_irq(void) if (irq == nr_irqs) panic("No available IRQ to bind to: increase nr_irqs!\n"); - desc = irq_to_desc_alloc_node(irq, 0); + desc = irq_to_desc_alloc_node_x(irq, 0, xen_init_chip_data); if (WARN_ON(desc == NULL)) return -1; Index: linux-2.6/include/linux/interrupt.h =================================================================== --- linux-2.6.orig/include/linux/interrupt.h +++ linux-2.6/include/linux/interrupt.h @@ -611,6 +611,5 @@ struct irq_desc; extern int early_irq_init(void); extern int arch_probe_nr_irqs(void); extern int arch_early_irq_init(void); -extern int arch_init_chip_data(struct irq_desc *desc, int node); #endif Index: linux-2.6/include/linux/irq.h =================================================================== --- linux-2.6.orig/include/linux/irq.h +++ linux-2.6/include/linux/irq.h @@ -131,6 +131,12 @@ struct irq_chip { void (*bus_lock)(unsigned int irq); void (*bus_sync_unlock)(unsigned int irq); + /* for move_irq_desc */ + void (*copy_chip_data)(struct irq_desc *old_desc, + struct irq_desc *desc, int node); + void (*free_chip_data)(struct irq_desc *old_desc, + struct irq_desc *desc); + /* Currently used only by UML, might disappear one day.*/ #ifdef CONFIG_IRQ_RELEASE_METHOD void (*release)(unsigned int irq, void *dev_id); @@ -208,10 +214,6 @@ struct irq_desc { const char *name; } ____cacheline_internodealigned_in_smp; -extern void arch_init_copy_chip_data(struct irq_desc *old_desc, - struct irq_desc *desc, int node); -extern void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc); - #ifndef CONFIG_SPARSE_IRQ extern struct irq_desc irq_desc[NR_IRQS]; #endif @@ -225,7 +227,15 @@ static inline struct irq_desc *move_irq_ } #endif -extern struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node); +typedef int (*init_chip_data_fn)(struct irq_desc *, int node); +int arch_init_irq_desc(struct irq_desc *desc, int node, init_chip_data_fn fn); +struct irq_desc *irq_to_desc_alloc_node_x(unsigned int irq, int node, + init_chip_data_fn fn); +static inline struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, + int node) +{ + return irq_to_desc_alloc_node_x(irq, node, NULL); +} /* * Pick up the arch-dependent methods: Index: linux-2.6/kernel/irq/handle.c =================================================================== --- linux-2.6.orig/kernel/irq/handle.c +++ linux-2.6/kernel/irq/handle.c @@ -100,7 +100,8 @@ void __ref init_kstat_irqs(struct irq_de } } -static void init_one_irq_desc(int irq, struct irq_desc *desc, int node) +static void init_one_irq_desc(int irq, struct irq_desc *desc, int node, + init_chip_data_fn init_chip_data) { memcpy(desc, &irq_desc_init, sizeof(struct irq_desc)); @@ -120,7 +121,7 @@ static void init_one_irq_desc(int irq, s BUG_ON(1); } init_desc_masks(desc); - arch_init_chip_data(desc, node); + arch_init_irq_desc(desc, node, init_chip_data); } /* @@ -198,7 +199,8 @@ int __init early_irq_init(void) return arch_early_irq_init(); } -struct irq_desc * __ref irq_to_desc_alloc_node(unsigned int irq, int node) +struct irq_desc * __ref irq_to_desc_alloc_node_x(unsigned int irq, int node, + init_chip_data_fn init_chip_data) { struct irq_desc *desc; unsigned long flags; @@ -227,7 +229,7 @@ struct irq_desc * __ref irq_to_desc_allo printk(KERN_ERR "can not alloc irq_desc\n"); BUG_ON(1); } - init_one_irq_desc(irq, desc, node); + init_one_irq_desc(irq, desc, node, init_chip_data); set_irq_desc(irq, desc); @@ -277,7 +279,8 @@ struct irq_desc *irq_to_desc(unsigned in return (irq < NR_IRQS) ? irq_desc + irq : NULL; } -struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node) +struct irq_desc *irq_to_desc_alloc_node_x(unsigned int irq, int node, + init_chip_data_fn init_chip_data) { return irq_to_desc(irq); } Index: linux-2.6/kernel/irq/numa_migrate.c =================================================================== --- linux-2.6.orig/kernel/irq/numa_migrate.c +++ linux-2.6/kernel/irq/numa_migrate.c @@ -47,7 +47,8 @@ static bool init_copy_one_irq_desc(int i lockdep_set_class(&desc->lock, &irq_desc_lock_class); init_copy_kstat_irqs(old_desc, desc, node, nr_cpu_ids); init_copy_desc_masks(old_desc, desc); - arch_init_copy_chip_data(old_desc, desc, node); + if (desc->chip->copy_chip_data) + desc->chip->copy_chip_data(old_desc, desc, node); return true; } @@ -55,7 +56,8 @@ static void free_one_irq_desc(struct irq { free_kstat_irqs(old_desc, desc); free_desc_masks(old_desc, desc); - arch_free_chip_data(old_desc, desc); + if (desc->chip->free_chip_data) + desc->chip->free_chip_data(old_desc, desc); } static struct irq_desc *__real_move_irq_desc(struct irq_desc *old_desc, @@ -107,9 +109,15 @@ out_unlock: struct irq_desc *move_irq_desc(struct irq_desc *desc, int node) { + /* those static or target node is -1, do not move them */ if (desc->irq < NR_IRQS_LEGACY || node == -1) return desc; + /* IRQ chip does not support movement */ + if (desc->chip_data && + (desc->chip->copy_chip_data == NULL || + desc->chip->free_chip_data == NULL)) + return desc; if (desc->node != node) desc = __real_move_irq_desc(desc, node); Index: linux-2.6/kernel/softirq.c =================================================================== --- linux-2.6.orig/kernel/softirq.c +++ linux-2.6/kernel/softirq.c @@ -895,8 +895,3 @@ int __init __weak arch_early_irq_init(vo { return 0; } - -int __weak arch_init_chip_data(struct irq_desc *desc, int node) -{ - return 0; -} Index: linux-2.6/kernel/irq/chip.c =================================================================== --- linux-2.6.orig/kernel/irq/chip.c +++ linux-2.6/kernel/irq/chip.c @@ -758,3 +758,10 @@ void __init set_irq_probe(unsigned int i desc->status &= ~IRQ_NOPROBE; raw_spin_unlock_irqrestore(&desc->lock, flags); } + +int __weak arch_init_irq_desc(struct irq_desc *desc, int node, + init_chip_data_fn init_chip_data) +{ + return 0; +} +

[1/2] irq: move some interrupt arch_* functions into struct irq_chip.

Commit Message

Patch