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);
+}
+