diff options
| -rw-r--r-- | arch/x86/kernel/io_apic.c | 130 | ||||
| -rw-r--r-- | arch/x86/kernel/irq_32.c | 8 | ||||
| -rw-r--r-- | arch/x86/kernel/irq_64.c | 8 | ||||
| -rw-r--r-- | drivers/char/random.c | 31 | ||||
| -rw-r--r-- | drivers/pci/htirq.c | 19 | ||||
| -rw-r--r-- | drivers/pci/intr_remapping.c | 75 | ||||
| -rw-r--r-- | fs/proc/proc_misc.c | 43 | ||||
| -rw-r--r-- | include/linux/irq.h | 20 | ||||
| -rw-r--r-- | kernel/irq/handle.c | 114 |
9 files changed, 10 insertions, 438 deletions
diff --git a/arch/x86/kernel/io_apic.c b/arch/x86/kernel/io_apic.c index f959acb..6836105 100644 --- a/arch/x86/kernel/io_apic.c +++ b/arch/x86/kernel/io_apic.c @@ -111,9 +111,6 @@ struct irq_cfg; struct irq_pin_list; struct irq_cfg { unsigned int irq; -#ifdef CONFIG_HAVE_SPARSE_IRQ - struct irq_cfg *next; -#endif struct irq_pin_list *irq_2_pin; cpumask_t domain; cpumask_t old_domain; @@ -151,15 +148,6 @@ static void init_one_irq_cfg(struct irq_cfg *cfg) static struct irq_cfg *irq_cfgx; -#ifdef CONFIG_HAVE_SPARSE_IRQ -/* - * Protect the irq_cfgx_free freelist: - */ -static DEFINE_SPINLOCK(irq_cfg_lock); - -static struct irq_cfg *irq_cfgx_free; -#endif - static void __init init_work(void *data) { struct dyn_array *da = data; @@ -174,114 +162,7 @@ static void __init init_work(void *data) legacy_count = ARRAY_SIZE(irq_cfg_legacy); for (i = legacy_count; i < *da->nr; i++) init_one_irq_cfg(&cfg[i]); - -#ifdef CONFIG_HAVE_SPARSE_IRQ - for (i = 1; i < *da->nr; i++) - cfg[i-1].next = &cfg[i]; - - irq_cfgx_free = &irq_cfgx[legacy_count]; - irq_cfgx[legacy_count - 1].next = NULL; -#endif -} - -#ifdef CONFIG_HAVE_SPARSE_IRQ -/* need to be biger than size of irq_cfg_legacy */ -static int nr_irq_cfg = 32; - -static int __init parse_nr_irq_cfg(char *arg) -{ - if (arg) { - nr_irq_cfg = simple_strtoul(arg, NULL, 0); - if (nr_irq_cfg < 32) - nr_irq_cfg = 32; - } - return 0; -} - -early_param("nr_irq_cfg", parse_nr_irq_cfg); - -#define for_each_irq_cfg(irqX, cfg) \ - for (cfg = irq_cfgx, irqX = cfg->irq; cfg; cfg = cfg->next, irqX = cfg ? cfg->irq : -1U) - - -DEFINE_DYN_ARRAY(irq_cfgx, sizeof(struct irq_cfg), nr_irq_cfg, PAGE_SIZE, init_work); - -static struct irq_cfg *irq_cfg(unsigned int irq) -{ - struct irq_cfg *cfg; - - cfg = irq_cfgx; - while (cfg) { - if (cfg->irq == irq) - return cfg; - - cfg = cfg->next; - } - - return NULL; -} - -static struct irq_cfg *irq_cfg_alloc(unsigned int irq) -{ - struct irq_cfg *cfg, *cfg_pri; - unsigned long flags; - int count = 0; - int i; - - cfg_pri = cfg = irq_cfgx; - while (cfg) { - if (cfg->irq == irq) - return cfg; - - cfg_pri = cfg; - cfg = cfg->next; - count++; - } - - spin_lock_irqsave(&irq_cfg_lock, flags); - if (!irq_cfgx_free) { - unsigned long phys; - unsigned long total_bytes; - /* - * we run out of pre-allocate ones, allocate more - */ - printk(KERN_DEBUG "try to get more irq_cfg %d\n", nr_irq_cfg); - - total_bytes = sizeof(struct irq_cfg) * nr_irq_cfg; - if (after_bootmem) - cfg = kzalloc(total_bytes, GFP_ATOMIC); - else - cfg = __alloc_bootmem_nopanic(total_bytes, PAGE_SIZE, 0); - - if (!cfg) - panic("please boot with nr_irq_cfg= %d\n", count * 2); - - phys = __pa(cfg); - printk(KERN_DEBUG "irq_cfg ==> [%#lx - %#lx]\n", phys, phys + total_bytes); - - for (i = 0; i < nr_irq_cfg; i++) - init_one_irq_cfg(&cfg[i]); - - for (i = 1; i < nr_irq_cfg; i++) - cfg[i-1].next = &cfg[i]; - - irq_cfgx_free = cfg; - } - - cfg = irq_cfgx_free; - irq_cfgx_free = irq_cfgx_free->next; - cfg->next = NULL; - if (cfg_pri) - cfg_pri->next = cfg; - else - irq_cfgx = cfg; - cfg->irq = irq; - - spin_unlock_irqrestore(&irq_cfg_lock, flags); - - return cfg; } -#else #define for_each_irq_cfg(irq, cfg) \ for (irq = 0, cfg = &irq_cfgx[irq]; irq < nr_irqs; irq++, cfg = &irq_cfgx[irq]) @@ -290,17 +171,16 @@ DEFINE_DYN_ARRAY(irq_cfgx, sizeof(struct irq_cfg), nr_irqs, PAGE_SIZE, init_work struct irq_cfg *irq_cfg(unsigned int irq) { - if (irq < nr_irqs) - return &irq_cfgx[irq]; + if (irq < nr_irqs) + return &irq_cfgx[irq]; - return NULL; + return NULL; } struct irq_cfg *irq_cfg_alloc(unsigned int irq) { - return irq_cfg(irq); + return irq_cfg(irq); } -#endif /* * This is performance-critical, we want to do it O(1) * @@ -3068,9 +2948,7 @@ unsigned int create_irq_nr(unsigned int irq_want) unsigned long flags; struct irq_cfg *cfg_new; -#ifndef CONFIG_HAVE_SPARSE_IRQ irq_want = nr_irqs - 1; -#endif irq = 0; spin_lock_irqsave(&vector_lock, flags); diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c index 001772f..ccf6c1b 100644 --- a/arch/x86/kernel/irq_32.c +++ b/arch/x86/kernel/irq_32.c @@ -272,20 +272,12 @@ int show_interrupts(struct seq_file *p, void *v) struct irq_desc *desc = NULL; int tail = 0; -#ifdef CONFIG_HAVE_SPARSE_IRQ - desc = (struct irq_desc *)v; - entries = -1U; - i = desc->irq; - if (!desc->next) - tail = 1; -#else entries = nr_irqs - 1; i = *(loff_t *) v; if (i == nr_irqs) tail = 1; else desc = irq_to_desc(i); -#endif if (i == 0) { seq_printf(p, " "); diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c index ec26610..21f53b9 100644 --- a/arch/x86/kernel/irq_64.c +++ b/arch/x86/kernel/irq_64.c @@ -77,20 +77,12 @@ int show_interrupts(struct seq_file *p, void *v) struct irq_desc *desc = NULL; int tail = 0; -#ifdef CONFIG_HAVE_SPARSE_IRQ - desc = (struct irq_desc *)v; - entries = -1U; - i = desc->irq; - if (!desc->next) - tail = 1; -#else entries = nr_irqs - 1; i = *(loff_t *) v; if (i == nr_irqs) tail = 1; else desc = irq_to_desc(i); -#endif if (i == 0) { seq_printf(p, " "); diff --git a/drivers/char/random.c b/drivers/char/random.c index 60c9c7e..9ce8021 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -558,8 +558,6 @@ struct timer_rand_state { unsigned dont_count_entropy:1; }; -#ifndef CONFIG_HAVE_SPARSE_IRQ - #ifdef CONFIG_HAVE_DYN_ARRAY static struct timer_rand_state **irq_timer_state; DEFINE_DYN_ARRAY(irq_timer_state, sizeof(struct timer_rand_state *), nr_irqs, PAGE_SIZE, NULL); @@ -583,33 +581,6 @@ static void set_timer_rand_state(unsigned int irq, struct timer_rand_state *stat irq_timer_state[irq] = state; } -#else - -static struct timer_rand_state *get_timer_rand_state(unsigned int irq) -{ - struct irq_desc *desc; - - desc = irq_to_desc(irq); - - if (!desc) - return NULL; - - return desc->timer_rand_state; -} - -static void set_timer_rand_state(unsigned int irq, struct timer_rand_state *state) -{ - struct irq_desc *desc; - - desc = irq_to_desc(irq); - - if (!desc) - return; - - desc->timer_rand_state = state; -} -#endif - static struct timer_rand_state input_timer_state; /* @@ -967,10 +938,8 @@ void rand_initialize_irq(int irq) { struct timer_rand_state *state; -#ifndef CONFIG_HAVE_SPARSE_IRQ if (irq >= nr_irqs) return; -#endif state = get_timer_rand_state(irq); diff --git a/drivers/pci/htirq.c b/drivers/pci/htirq.c index 9e4929a..bf7d6ce 100644 --- a/drivers/pci/htirq.c +++ b/drivers/pci/htirq.c @@ -82,18 +82,6 @@ void unmask_ht_irq(unsigned int irq) write_ht_irq_msg(irq, &msg); } -static unsigned int build_irq_for_pci_dev(struct pci_dev *dev) -{ - unsigned int irq; - - irq = dev->bus->number; - irq <<= 8; - irq |= dev->devfn; - irq <<= 12; - - return irq; -} - /** * __ht_create_irq - create an irq and attach it to a device. * @dev: The hypertransport device to find the irq capability on. @@ -110,7 +98,6 @@ int __ht_create_irq(struct pci_dev *dev, int idx, ht_irq_update_t *update) int max_irq; int pos; int irq; - unsigned int irq_want; pos = pci_find_ht_capability(dev, HT_CAPTYPE_IRQ); if (!pos) @@ -138,12 +125,8 @@ 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_want= build_irq_for_pci_dev(dev); -#ifdef CONFIG_HAVE_SPARSE_IRQ - irq = create_irq_nr(irq_want + idx); -#else irq = create_irq(); -#endif + if (irq <= 0) { kfree(cfg); return -EBUSY; diff --git a/drivers/pci/intr_remapping.c b/drivers/pci/intr_remapping.c index 2dcf973..0f43b26 100644 --- a/drivers/pci/intr_remapping.c +++ b/drivers/pci/intr_remapping.c @@ -19,78 +19,6 @@ struct irq_2_iommu { u8 irte_mask; }; -#ifdef CONFIG_HAVE_SPARSE_IRQ -static struct irq_2_iommu *irq_2_iommuX; -/* fill one page ? */ -static int nr_irq_2_iommu = 0x100; -static int irq_2_iommu_index; -DEFINE_DYN_ARRAY(irq_2_iommuX, sizeof(struct irq_2_iommu), nr_irq_2_iommu, PAGE_SIZE, NULL); - -extern void *__alloc_bootmem_nopanic(unsigned long size, - unsigned long align, - unsigned long goal); - -static struct irq_2_iommu *get_one_free_irq_2_iommu(int not_used) -{ - struct irq_2_iommu *iommu; - unsigned long total_bytes; - - if (irq_2_iommu_index >= nr_irq_2_iommu) { - /* - * we run out of pre-allocate ones, allocate more - */ - printk(KERN_DEBUG "try to get more irq_2_iommu %d\n", nr_irq_2_iommu); - - total_bytes = sizeof(struct irq_2_iommu)*nr_irq_2_iommu; - - if (after_bootmem) - iommu = kzalloc(total_bytes, GFP_ATOMIC); - else - iommu = __alloc_bootmem_nopanic(total_bytes, PAGE_SIZE, 0); - - if (!iommu) - panic("can not get more irq_2_iommu\n"); - - irq_2_iommuX = iommu; - irq_2_iommu_index = 0; - } - - iommu = &irq_2_iommuX[irq_2_iommu_index]; - irq_2_iommu_index++; - return iommu; -} - -static struct irq_2_iommu *irq_2_iommu(unsigned int irq) -{ - struct irq_desc *desc; - - desc = irq_to_desc(irq); - - BUG_ON(!desc); - - return desc->irq_2_iommu; -} - -static struct irq_2_iommu *irq_2_iommu_alloc(unsigned int irq) -{ - struct irq_desc *desc; - struct irq_2_iommu *irq_iommu; - - /* - * alloc irq desc if not allocated already. - */ - desc = irq_to_desc_alloc(irq); - - irq_iommu = desc->irq_2_iommu; - - if (!irq_iommu) - desc->irq_2_iommu = get_one_free_irq_2_iommu(irq); - - return desc->irq_2_iommu; -} - -#else /* !CONFIG_HAVE_SPARSE_IRQ */ - #ifdef CONFIG_HAVE_DYN_ARRAY static struct irq_2_iommu *irq_2_iommuX; DEFINE_DYN_ARRAY(irq_2_iommuX, sizeof(struct irq_2_iommu), nr_irqs, PAGE_SIZE, NULL); @@ -109,7 +37,6 @@ static struct irq_2_iommu *irq_2_iommu_alloc(unsigned int irq) { return irq_2_iommu(irq); } -#endif static DEFINE_SPINLOCK(irq_2_ir_lock); @@ -166,11 +93,9 @@ int alloc_irte(struct intel_iommu *iommu, int irq, u16 count) if (!count) return -1; -#ifndef CONFIG_HAVE_SPARSE_IRQ /* protect irq_2_iommu_alloc later */ if (irq >= nr_irqs) return -1; -#endif /* * start the IRTE search from index 0. diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c index d68c359..3f5c7b9 100644 --- a/fs/proc/proc_misc.c +++ b/fs/proc/proc_misc.c @@ -529,13 +529,10 @@ static int show_stat(struct seq_file *p, void *v) softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq); steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal); guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest); + for_each_irq_desc(j, desc) - { - unsigned int temp; + sum += kstat_irqs_cpu(j, i); - temp = kstat_irqs_cpu(j, i); - sum += temp; - } sum += arch_irq_stat_cpu(i); } sum += arch_irq_stat(); @@ -578,21 +575,13 @@ static int show_stat(struct seq_file *p, void *v) seq_printf(p, "intr %llu", (unsigned long long)sum); /* sum again ? it could be updated? */ - for_each_irq_desc(j, desc) - { + for_each_irq_desc(j, desc) { per_irq_sum = 0; - for_each_possible_cpu(i) { - unsigned int temp; - temp = kstat_irqs_cpu(j, i); - per_irq_sum += temp; - } + for_each_possible_cpu(i) + per_irq_sum += kstat_irqs_cpu(j, i); -#ifdef CONFIG_HAVE_SPARSE_IRQ - seq_printf(p, " %#x:%u", j, per_irq_sum); -#else seq_printf(p, " %u", per_irq_sum); -#endif } seq_printf(p, @@ -645,36 +634,14 @@ static const struct file_operations proc_stat_operations = { */ static void *int_seq_start(struct seq_file *f, loff_t *pos) { -#ifdef CONFIG_HAVE_SPARSE_IRQ - struct irq_desc *desc; - int irq; - int count = *pos; - - for_each_irq_desc(irq, desc) { - if (count-- == 0) - return desc; - } - - return NULL; -#else return (*pos <= nr_irqs) ? pos : NULL; -#endif } static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos) { -#ifdef CONFIG_HAVE_SPARSE_IRQ - struct irq_desc *desc; - - desc = ((struct irq_desc *)v)->next; - (*pos)++; - - return desc; -#else (*pos)++; return (*pos <= nr_irqs) ? pos : NULL; -#endif } static void int_seq_stop(struct seq_file *f, void *v) diff --git a/include/linux/irq.h b/include/linux/irq.h index 7d1adac..68e0f3f 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -167,16 +167,9 @@ struct irq_2_iommu; */ struct irq_desc { unsigned int irq; -#ifdef CONFIG_HAVE_SPARSE_IRQ - struct irq_desc *next; - struct timer_rand_state *timer_rand_state; -#endif #ifdef CONFIG_HAVE_DYN_ARRAY unsigned int *kstat_irqs; #endif -#if defined(CONFIG_INTR_REMAP) && defined(CONFIG_HAVE_SPARSE_IRQ) - struct irq_2_iommu *irq_2_iommu; -#endif irq_flow_handler_t handle_irq; struct irq_chip *chip; struct msi_desc *msi_desc; @@ -205,8 +198,6 @@ struct irq_desc { } ____cacheline_internodealigned_in_smp; -#ifndef CONFIG_HAVE_SPARSE_IRQ - #ifndef CONFIG_HAVE_DYN_ARRAY /* could be removed if we get rid of all irq_desc reference */ extern struct irq_desc irq_desc[NR_IRQS]; @@ -224,17 +215,6 @@ static inline struct irq_desc *irq_to_desc_alloc(unsigned int irq) return irq_to_desc(irq); } -#else - -extern struct irq_desc *irq_to_desc(unsigned int irq); -extern struct irq_desc *irq_to_desc_alloc(unsigned int irq); - -extern struct irq_desc *sparse_irqs; -#define for_each_irq_desc(irqX, desc) \ - for (desc = sparse_irqs, irqX = desc->irq; desc; desc = desc->next, irqX = desc ? desc->irq : -1U) - -#endif - #ifdef CONFIG_HAVE_DYN_ARRAY #define kstat_irqs_this_cpu(DESC) \ ((DESC)->kstat_irqs[smp_processor_id()]) diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c index c19896f..f837133 100644 --- a/kernel/irq/handle.c +++ b/kernel/irq/handle.c @@ -111,15 +111,6 @@ static void init_kstat_irqs(struct irq_desc *desc, int nr_desc, int nr) } } -#ifdef CONFIG_HAVE_SPARSE_IRQ -/* - * Protect the sparse_irqs_free freelist: - */ -static DEFINE_SPINLOCK(sparse_irq_lock); -static struct irq_desc *sparse_irqs_free; -struct irq_desc *sparse_irqs; -#endif - static void __init init_work(void *data) { struct dyn_array *da = data; @@ -130,121 +121,16 @@ static void __init init_work(void *data) for (i = 0; i < *da->nr; i++) { init_one_irq_desc(&desc[i]); -#ifndef CONFIG_HAVE_SPARSE_IRQ desc[i].irq = i; -#endif } /* init kstat_irqs, nr_cpu_ids is ready already */ init_kstat_irqs(desc, *da->nr, nr_cpu_ids); - -#ifdef CONFIG_HAVE_SPARSE_IRQ - for (i = 1; i < *da->nr; i++) - desc[i-1].next = &desc[i]; - - sparse_irqs_free = sparse_irqs; - sparse_irqs = NULL; -#endif -} - -#ifdef CONFIG_HAVE_SPARSE_IRQ -static int nr_irq_desc = 32; - -static int __init parse_nr_irq_desc(char *arg) -{ - if (arg) - nr_irq_desc = simple_strtoul(arg, NULL, 0); - return 0; -} - -early_param("nr_irq_desc", parse_nr_irq_desc); - -DEFINE_DYN_ARRAY(sparse_irqs, sizeof(struct irq_desc), nr_irq_desc, PAGE_SIZE, init_work); - -struct irq_desc *irq_to_desc(unsigned int irq) -{ - struct irq_desc *desc; - - desc = sparse_irqs; - while (desc) { - if (desc->irq == irq) - return desc; - - desc = desc->next; - } - return NULL; } -struct irq_desc *irq_to_desc_alloc(unsigned int irq) -{ - struct irq_desc *desc, *desc_pri; - unsigned long flags; - int count = 0; - int i; - - desc_pri = desc = sparse_irqs; - while (desc) { - if (desc->irq == irq) - return desc; - - desc_pri = desc; - desc = desc->next; - count++; - } - - spin_lock_irqsave(&sparse_irq_lock, flags); - /* - * we run out of pre-allocate ones, allocate more - */ - if (!sparse_irqs_free) { - unsigned long phys; - unsigned long total_bytes; - - printk(KERN_DEBUG "try to get more irq_desc %d\n", nr_irq_desc); - - total_bytes = sizeof(struct irq_desc) * nr_irq_desc; - if (after_bootmem) - desc = kzalloc(total_bytes, GFP_ATOMIC); - else - desc = __alloc_bootmem_nopanic(total_bytes, PAGE_SIZE, 0); - - if (!desc) - panic("please boot with nr_irq_desc= %d\n", count * 2); - - phys = __pa(desc); - printk(KERN_DEBUG "irq_desc ==> [%#lx - %#lx]\n", phys, phys + total_bytes); - - for (i = 0; i < nr_irq_desc; i++) - init_one_irq_desc(&desc[i]); - - for (i = 1; i < nr_irq_desc; i++) - desc[i-1].next = &desc[i]; - - /* init kstat_irqs, nr_cpu_ids is ready already */ - init_kstat_irqs(desc, nr_irq_desc, nr_cpu_ids); - - sparse_irqs_free = desc; - } - - desc = sparse_irqs_free; - sparse_irqs_free = sparse_irqs_free->next; - desc->next = NULL; - if (desc_pri) - desc_pri->next = desc; - else - sparse_irqs = desc; - desc->irq = irq; - - spin_unlock_irqrestore(&sparse_irq_lock, flags); - - return desc; -} -#else struct irq_desc *irq_desc; DEFINE_DYN_ARRAY(irq_desc, sizeof(struct irq_desc), nr_irqs, PAGE_SIZE, init_work); -#endif - #else struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = { |
