diff options
Diffstat (limited to 'arch/powerpc/platforms/iseries/irq.c')
| -rw-r--r-- | arch/powerpc/platforms/iseries/irq.c | 105 |
1 files changed, 64 insertions, 41 deletions
diff --git a/arch/powerpc/platforms/iseries/irq.c b/arch/powerpc/platforms/iseries/irq.c index f70e820e7304..2275e64f3152 100644 --- a/arch/powerpc/platforms/iseries/irq.c +++ b/arch/powerpc/platforms/iseries/irq.c @@ -162,27 +162,6 @@ static void pci_event_handler(struct HvLpEvent *event, struct pt_regs *regs) printk(KERN_ERR "pci_event_handler: NULL event received\n"); } -/* - * This is called by init_IRQ. set in ppc_md.init_IRQ by iSeries_setup.c - * It must be called before the bus walk. - */ -void __init iSeries_init_IRQ(void) -{ - /* Register PCI event handler and open an event path */ - int ret; - - ret = HvLpEvent_registerHandler(HvLpEvent_Type_PciIo, - &pci_event_handler); - if (ret == 0) { - ret = HvLpEvent_openPath(HvLpEvent_Type_PciIo, 0); - if (ret != 0) - printk(KERN_ERR "iseries_init_IRQ: open event path " - "failed with rc 0x%x\n", ret); - } else - printk(KERN_ERR "iseries_init_IRQ: register handler " - "failed with rc 0x%x\n", ret); -} - #define REAL_IRQ_TO_SUBBUS(irq) (((irq) >> 14) & 0xff) #define REAL_IRQ_TO_BUS(irq) ((((irq) >> 6) & 0xff) + 1) #define REAL_IRQ_TO_IDSEL(irq) ((((irq) >> 3) & 7) + 1) @@ -196,7 +175,7 @@ static void iseries_enable_IRQ(unsigned int irq) { u32 bus, dev_id, function, mask; const u32 sub_bus = 0; - unsigned int rirq = virt_irq_to_real_map[irq]; + unsigned int rirq = (unsigned int)irq_map[irq].hwirq; /* The IRQ has already been locked by the caller */ bus = REAL_IRQ_TO_BUS(rirq); @@ -213,7 +192,7 @@ static unsigned int iseries_startup_IRQ(unsigned int irq) { u32 bus, dev_id, function, mask; const u32 sub_bus = 0; - unsigned int rirq = virt_irq_to_real_map[irq]; + unsigned int rirq = (unsigned int)irq_map[irq].hwirq; bus = REAL_IRQ_TO_BUS(rirq); function = REAL_IRQ_TO_FUNC(rirq); @@ -254,7 +233,7 @@ static void iseries_shutdown_IRQ(unsigned int irq) { u32 bus, dev_id, function, mask; const u32 sub_bus = 0; - unsigned int rirq = virt_irq_to_real_map[irq]; + unsigned int rirq = (unsigned int)irq_map[irq].hwirq; /* irq should be locked by the caller */ bus = REAL_IRQ_TO_BUS(rirq); @@ -277,7 +256,7 @@ static void iseries_disable_IRQ(unsigned int irq) { u32 bus, dev_id, function, mask; const u32 sub_bus = 0; - unsigned int rirq = virt_irq_to_real_map[irq]; + unsigned int rirq = (unsigned int)irq_map[irq].hwirq; /* The IRQ has already been locked by the caller */ bus = REAL_IRQ_TO_BUS(rirq); @@ -291,19 +270,19 @@ static void iseries_disable_IRQ(unsigned int irq) static void iseries_end_IRQ(unsigned int irq) { - unsigned int rirq = virt_irq_to_real_map[irq]; + unsigned int rirq = (unsigned int)irq_map[irq].hwirq; HvCallPci_eoi(REAL_IRQ_TO_BUS(rirq), REAL_IRQ_TO_SUBBUS(rirq), (REAL_IRQ_TO_IDSEL(rirq) << 4) + REAL_IRQ_TO_FUNC(rirq)); } -static hw_irq_controller iSeries_IRQ_handler = { - .typename = "iSeries irq controller", - .startup = iseries_startup_IRQ, - .shutdown = iseries_shutdown_IRQ, - .enable = iseries_enable_IRQ, - .disable = iseries_disable_IRQ, - .end = iseries_end_IRQ +static struct irq_chip iseries_pic = { + .typename = "iSeries irq controller", + .startup = iseries_startup_IRQ, + .shutdown = iseries_shutdown_IRQ, + .unmask = iseries_enable_IRQ, + .mask = iseries_disable_IRQ, + .eoi = iseries_end_IRQ }; /* @@ -314,17 +293,14 @@ static hw_irq_controller iSeries_IRQ_handler = { int __init iSeries_allocate_IRQ(HvBusNumber bus, HvSubBusNumber sub_bus, u32 bsubbus) { - int virtirq; unsigned int realirq; u8 idsel = ISERIES_GET_DEVICE_FROM_SUBBUS(bsubbus); u8 function = ISERIES_GET_FUNCTION_FROM_SUBBUS(bsubbus); realirq = (((((sub_bus << 8) + (bus - 1)) << 3) + (idsel - 1)) << 3) + function; - virtirq = virt_irq_create_mapping(realirq); - irq_desc[virtirq].chip = &iSeries_IRQ_handler; - return virtirq; + return irq_create_mapping(NULL, realirq, IRQ_TYPE_NONE); } #endif /* CONFIG_PCI */ @@ -332,10 +308,9 @@ int __init iSeries_allocate_IRQ(HvBusNumber bus, /* * Get the next pending IRQ. */ -int iSeries_get_irq(struct pt_regs *regs) +unsigned int iSeries_get_irq(struct pt_regs *regs) { - /* -2 means ignore this interrupt */ - int irq = -2; + int irq = NO_IRQ_IGNORE; #ifdef CONFIG_SMP if (get_lppaca()->int_dword.fields.ipi_cnt) { @@ -358,9 +333,57 @@ int iSeries_get_irq(struct pt_regs *regs) } spin_unlock(&pending_irqs_lock); if (irq >= NR_IRQS) - irq = -2; + irq = NO_IRQ_IGNORE; } #endif return irq; } + +static int iseries_irq_host_map(struct irq_host *h, unsigned int virq, + irq_hw_number_t hw, unsigned int flags) +{ + set_irq_chip_and_handler(virq, &iseries_pic, handle_fasteoi_irq); + + return 0; +} + +static struct irq_host_ops iseries_irq_host_ops = { + .map = iseries_irq_host_map, +}; + +/* + * This is called by init_IRQ. set in ppc_md.init_IRQ by iSeries_setup.c + * It must be called before the bus walk. + */ +void __init iSeries_init_IRQ(void) +{ + /* Register PCI event handler and open an event path */ + struct irq_host *host; + int ret; + + /* + * The Hypervisor only allows us up to 256 interrupt + * sources (the irq number is passed in a u8). + */ + irq_set_virq_count(256); + + /* Create irq host. No need for a revmap since HV will give us + * back our virtual irq number + */ + host = irq_alloc_host(IRQ_HOST_MAP_NOMAP, 0, &iseries_irq_host_ops, 0); + BUG_ON(host == NULL); + irq_set_default_host(host); + + ret = HvLpEvent_registerHandler(HvLpEvent_Type_PciIo, + &pci_event_handler); + if (ret == 0) { + ret = HvLpEvent_openPath(HvLpEvent_Type_PciIo, 0); + if (ret != 0) + printk(KERN_ERR "iseries_init_IRQ: open event path " + "failed with rc 0x%x\n", ret); + } else + printk(KERN_ERR "iseries_init_IRQ: register handler " + "failed with rc 0x%x\n", ret); +} + |