diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/irq/Kconfig | 2 | ||||
| -rw-r--r-- | kernel/irq/irqdomain.c | 46 |
2 files changed, 17 insertions, 31 deletions
diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig index cf1a4a68ce4..d1a758bc972 100644 --- a/kernel/irq/Kconfig +++ b/kernel/irq/Kconfig @@ -62,7 +62,7 @@ config IRQ_DOMAIN_DEBUG help This option will show the mapping relationship between hardware irq numbers and Linux irq numbers. The mapping is exposed via debugfs - in the file "virq_mapping". + in the file "irq_domain_mapping". If you don't know what this means you don't need it. diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index 3601f3fbf67..d34413e7862 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -23,7 +23,6 @@ static LIST_HEAD(irq_domain_list); static DEFINE_MUTEX(irq_domain_mutex); static DEFINE_MUTEX(revmap_trees_mutex); -static unsigned int irq_virq_count = NR_IRQS; static struct irq_domain *irq_default_domain; /** @@ -184,13 +183,16 @@ struct irq_domain *irq_domain_add_linear(struct device_node *of_node, } struct irq_domain *irq_domain_add_nomap(struct device_node *of_node, + unsigned int max_irq, const struct irq_domain_ops *ops, void *host_data) { struct irq_domain *domain = irq_domain_alloc(of_node, IRQ_DOMAIN_MAP_NOMAP, ops, host_data); - if (domain) + if (domain) { + domain->revmap_data.nomap.max_irq = max_irq ? max_irq : ~0; irq_domain_add(domain); + } return domain; } @@ -262,22 +264,6 @@ void irq_set_default_host(struct irq_domain *domain) irq_default_domain = domain; } -/** - * irq_set_virq_count() - Set the maximum number of linux irqs - * @count: number of linux irqs, capped with NR_IRQS - * - * This is mainly for use by platforms like iSeries who want to program - * the virtual irq number in the controller to avoid the reverse mapping - */ -void irq_set_virq_count(unsigned int count) -{ - pr_debug("irq: Trying to set virq count to %d\n", count); - - BUG_ON(count < NUM_ISA_INTERRUPTS); - if (count < NR_IRQS) - irq_virq_count = count; -} - static int irq_setup_virq(struct irq_domain *domain, unsigned int virq, irq_hw_number_t hwirq) { @@ -320,13 +306,12 @@ unsigned int irq_create_direct_mapping(struct irq_domain *domain) pr_debug("irq: create_direct virq allocation failed\n"); return 0; } - if (virq >= irq_virq_count) { + if (virq >= domain->revmap_data.nomap.max_irq) { pr_err("ERROR: no free irqs available below %i maximum\n", - irq_virq_count); + domain->revmap_data.nomap.max_irq); irq_free_desc(virq); return 0; } - pr_debug("irq: create_direct obtained virq %d\n", virq); if (irq_setup_virq(domain, virq, virq)) { @@ -350,7 +335,8 @@ unsigned int irq_create_direct_mapping(struct irq_domain *domain) unsigned int irq_create_mapping(struct irq_domain *domain, irq_hw_number_t hwirq) { - unsigned int virq, hint; + unsigned int hint; + int virq; pr_debug("irq: irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq); @@ -377,13 +363,13 @@ unsigned int irq_create_mapping(struct irq_domain *domain, return irq_domain_legacy_revmap(domain, hwirq); /* Allocate a virtual interrupt number */ - hint = hwirq % irq_virq_count; + hint = hwirq % nr_irqs; if (hint == 0) hint++; virq = irq_alloc_desc_from(hint, 0); - if (!virq) + if (virq <= 0) virq = irq_alloc_desc_from(1, 0); - if (!virq) { + if (virq <= 0) { pr_debug("irq: -> virq allocation failed\n"); return 0; } @@ -515,7 +501,7 @@ unsigned int irq_find_mapping(struct irq_domain *domain, irq_hw_number_t hwirq) { unsigned int i; - unsigned int hint = hwirq % irq_virq_count; + unsigned int hint = hwirq % nr_irqs; /* Look for default domain if nececssary */ if (domain == NULL) @@ -536,7 +522,7 @@ unsigned int irq_find_mapping(struct irq_domain *domain, if (data && (data->domain == domain) && (data->hwirq == hwirq)) return i; i++; - if (i >= irq_virq_count) + if (i >= nr_irqs) i = 1; } while(i != hint); return 0; @@ -642,8 +628,8 @@ static int virq_debug_show(struct seq_file *m, void *private) void *data; int i; - seq_printf(m, "%-5s %-7s %-15s %-18s %s\n", "virq", "hwirq", - "chip name", "chip data", "domain name"); + seq_printf(m, "%-5s %-7s %-15s %-*s %s\n", "irq", "hwirq", + "chip name", 2 * sizeof(void *) + 2, "chip data", "domain name"); for (i = 1; i < nr_irqs; i++) { desc = irq_to_desc(i); @@ -666,7 +652,7 @@ static int virq_debug_show(struct seq_file *m, void *private) seq_printf(m, "%-15s ", p); data = irq_desc_get_chip_data(desc); - seq_printf(m, "0x%16p ", data); + seq_printf(m, data ? "0x%p " : " %p ", data); if (desc->irq_data.domain && desc->irq_data.domain->of_node) p = desc->irq_data.domain->of_node->full_name; |