diff options
author | Grant Likely <grant.likely@secretlab.ca> | 2012-02-14 21:06:57 (GMT) |
---|---|---|
committer | Grant Likely <grant.likely@secretlab.ca> | 2012-02-16 13:11:23 (GMT) |
commit | 75294957be1dee7d22dd7d90bd31334ba410e836 (patch) | |
tree | afa8e2905af88ceeba2dccb50b56c42568e18ab9 /arch/arm/common/gic.c | |
parent | 5769089ac72569d024817270ab79fdf0b9046dde (diff) | |
download | linux-fsl-qoriq-75294957be1dee7d22dd7d90bd31334ba410e836.tar.xz |
irq_domain: Remove 'new' irq_domain in favour of the ppc one
This patch removes the simplistic implementation of irq_domains and enables
the powerpc infrastructure for all irq_domain users. The powerpc
infrastructure includes support for complex mappings between Linux and
hardware irq numbers, and can manage allocation of irq_descs.
This patch also converts the few users of irq_domain_add()/irq_domain_del()
to call irq_domain_add_legacy() instead.
v3: Fix bug that set up too many irqs in translation range.
v2: Fix removal of irq_alloc_descs() call in gic driver
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Milton Miller <miltonm@bga.com>
Tested-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/arm/common/gic.c')
-rw-r--r-- | arch/arm/common/gic.c | 85 |
1 files changed, 37 insertions, 48 deletions
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c index dc19862..7275d80 100644 --- a/arch/arm/common/gic.c +++ b/arch/arm/common/gic.c @@ -51,7 +51,6 @@ union gic_base { }; struct gic_chip_data { - unsigned int irq_offset; union gic_base dist_base; union gic_base cpu_base; #ifdef CONFIG_CPU_PM @@ -61,9 +60,7 @@ struct gic_chip_data { u32 __percpu *saved_ppi_enable; u32 __percpu *saved_ppi_conf; #endif -#ifdef CONFIG_IRQ_DOMAIN - struct irq_domain domain; -#endif + struct irq_domain *domain; unsigned int gic_irqs; #ifdef CONFIG_GIC_NON_BANKED void __iomem *(*get_base)(union gic_base *); @@ -282,7 +279,7 @@ asmlinkage void __exception_irq_entry gic_handle_irq(struct pt_regs *regs) irqnr = irqstat & ~0x1c00; if (likely(irqnr > 15 && irqnr < 1021)) { - irqnr = irq_domain_to_irq(&gic->domain, irqnr); + irqnr = irq_find_mapping(gic->domain, irqnr); handle_IRQ(irqnr, regs); continue; } @@ -314,8 +311,8 @@ static void gic_handle_cascade_irq(unsigned int irq, struct irq_desc *desc) if (gic_irq == 1023) goto out; - cascade_irq = irq_domain_to_irq(&chip_data->domain, gic_irq); - if (unlikely(gic_irq < 32 || gic_irq > 1020 || cascade_irq >= NR_IRQS)) + cascade_irq = irq_find_mapping(chip_data->domain, gic_irq); + if (unlikely(gic_irq < 32 || gic_irq > 1020)) do_bad_IRQ(cascade_irq, desc); else generic_handle_irq(cascade_irq); @@ -348,10 +345,9 @@ void __init gic_cascade_irq(unsigned int gic_nr, unsigned int irq) static void __init gic_dist_init(struct gic_chip_data *gic) { - unsigned int i, irq; + unsigned int i; u32 cpumask; unsigned int gic_irqs = gic->gic_irqs; - struct irq_domain *domain = &gic->domain; void __iomem *base = gic_data_dist_base(gic); u32 cpu = cpu_logical_map(smp_processor_id()); @@ -386,23 +382,6 @@ static void __init gic_dist_init(struct gic_chip_data *gic) for (i = 32; i < gic_irqs; i += 32) writel_relaxed(0xffffffff, base + GIC_DIST_ENABLE_CLEAR + i * 4 / 32); - /* - * Setup the Linux IRQ subsystem. - */ - irq_domain_for_each_irq(domain, i, irq) { - if (i < 32) { - irq_set_percpu_devid(irq); - irq_set_chip_and_handler(irq, &gic_chip, - handle_percpu_devid_irq); - set_irq_flags(irq, IRQF_VALID | IRQF_NOAUTOEN); - } else { - irq_set_chip_and_handler(irq, &gic_chip, - handle_fasteoi_irq); - set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); - } - irq_set_chip_data(irq, gic); - } - writel_relaxed(1, base + GIC_DIST_CTRL); } @@ -618,7 +597,23 @@ static void __init gic_pm_init(struct gic_chip_data *gic) } #endif -#ifdef CONFIG_OF +static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hw) +{ + if (hw < 32) { + irq_set_percpu_devid(irq); + irq_set_chip_and_handler(irq, &gic_chip, + handle_percpu_devid_irq); + set_irq_flags(irq, IRQF_VALID | IRQF_NOAUTOEN); + } else { + irq_set_chip_and_handler(irq, &gic_chip, + handle_fasteoi_irq); + set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); + } + irq_set_chip_data(irq, d->host_data); + return 0; +} + static int gic_irq_domain_xlate(struct irq_domain *d, struct device_node *controller, const u32 *intspec, unsigned int intsize, @@ -639,26 +634,23 @@ static int gic_irq_domain_xlate(struct irq_domain *d, *out_type = intspec[2] & IRQ_TYPE_SENSE_MASK; return 0; } -#endif struct irq_domain_ops gic_irq_domain_ops = { -#ifdef CONFIG_OF + .map = gic_irq_domain_map, .xlate = gic_irq_domain_xlate, -#endif }; void __init gic_init_bases(unsigned int gic_nr, int irq_start, void __iomem *dist_base, void __iomem *cpu_base, - u32 percpu_offset) + u32 percpu_offset, struct device_node *node) { + irq_hw_number_t hwirq_base; struct gic_chip_data *gic; - struct irq_domain *domain; - int gic_irqs; + int gic_irqs, irq_base; BUG_ON(gic_nr >= MAX_GIC_NR); gic = &gic_data[gic_nr]; - domain = &gic->domain; #ifdef CONFIG_GIC_NON_BANKED if (percpu_offset) { /* Frankein-GIC without banked registers... */ unsigned int cpu; @@ -694,10 +686,10 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start, * For primary GICs, skip over SGIs. * For secondary GICs, skip over PPIs, too. */ - domain->hwirq_base = 32; + hwirq_base = 32; if (gic_nr == 0) { if ((irq_start & 31) > 0) { - domain->hwirq_base = 16; + hwirq_base = 16; if (irq_start != -1) irq_start = (irq_start & ~31) + 16; } @@ -713,17 +705,17 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start, gic_irqs = 1020; gic->gic_irqs = gic_irqs; - domain->nr_irq = gic_irqs - domain->hwirq_base; - domain->irq_base = irq_alloc_descs(irq_start, 16, domain->nr_irq, - numa_node_id()); - if (IS_ERR_VALUE(domain->irq_base)) { + gic_irqs -= hwirq_base; /* calculate # of irqs to allocate */ + irq_base = irq_alloc_descs(irq_start, 16, gic_irqs, numa_node_id()); + if (IS_ERR_VALUE(irq_base)) { WARN(1, "Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n", irq_start); - domain->irq_base = irq_start; + irq_base = irq_start; } - domain->host_data = gic; - domain->ops = &gic_irq_domain_ops; - irq_domain_add(domain); + gic->domain = irq_domain_add_legacy(node, gic_irqs, irq_base, + hwirq_base, &gic_irq_domain_ops, gic); + if (WARN_ON(!gic->domain)) + return; gic_chip.flags |= gic_arch_extn.flags; gic_dist_init(gic); @@ -768,7 +760,6 @@ int __init gic_of_init(struct device_node *node, struct device_node *parent) void __iomem *dist_base; u32 percpu_offset; int irq; - struct irq_domain *domain = &gic_data[gic_cnt].domain; if (WARN_ON(!node)) return -ENODEV; @@ -782,9 +773,7 @@ int __init gic_of_init(struct device_node *node, struct device_node *parent) if (of_property_read_u32(node, "cpu-offset", &percpu_offset)) percpu_offset = 0; - domain->of_node = of_node_get(node); - - gic_init_bases(gic_cnt, -1, dist_base, cpu_base, percpu_offset); + gic_init_bases(gic_cnt, -1, dist_base, cpu_base, percpu_offset, node); if (parent) { irq = irq_of_parse_and_map(node, 0); |