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-rw-r--r--arch/ppc64/kernel/iSeries_irq.c312
1 files changed, 228 insertions, 84 deletions
diff --git a/arch/ppc64/kernel/iSeries_irq.c b/arch/ppc64/kernel/iSeries_irq.c
index f831d259dbb7..77376c1bd611 100644
--- a/arch/ppc64/kernel/iSeries_irq.c
+++ b/arch/ppc64/kernel/iSeries_irq.c
@@ -1,27 +1,29 @@
-/************************************************************************/
-/* This module supports the iSeries PCI bus interrupt handling */
-/* Copyright (C) 20yy <Robert L Holtorf> <IBM Corp> */
-/* */
-/* This program is free software; you can redistribute it and/or modify */
-/* it under the terms of the GNU General Public License as published by */
-/* the Free Software Foundation; either version 2 of the License, or */
-/* (at your option) any later version. */
-/* */
-/* This program is distributed in the hope that it will be useful, */
-/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
-/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
-/* GNU General Public License for more details. */
-/* */
-/* You should have received a copy of the GNU General Public License */
-/* along with this program; if not, write to the: */
-/* Free Software Foundation, Inc., */
-/* 59 Temple Place, Suite 330, */
-/* Boston, MA 02111-1307 USA */
-/************************************************************************/
-/* Change Activity: */
-/* Created, December 13, 2000 by Wayne Holm */
-/* End Change Activity */
-/************************************************************************/
+/*
+ * This module supports the iSeries PCI bus interrupt handling
+ * Copyright (C) 20yy <Robert L Holtorf> <IBM Corp>
+ * Copyright (C) 2004-2005 IBM Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the:
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307 USA
+ *
+ * Change Activity:
+ * Created, December 13, 2000 by Wayne Holm
+ * End Change Activity
+ */
+#include <linux/config.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/threads.h>
@@ -30,30 +32,15 @@
#include <linux/string.h>
#include <linux/bootmem.h>
#include <linux/ide.h>
-
#include <linux/irq.h>
#include <linux/spinlock.h>
-#include <asm/ppcdebug.h>
+#include <asm/ppcdebug.h>
+#include <asm/iSeries/HvTypes.h>
+#include <asm/iSeries/HvLpEvent.h>
#include <asm/iSeries/HvCallPci.h>
#include <asm/iSeries/HvCallXm.h>
#include <asm/iSeries/iSeries_irq.h>
-#include <asm/iSeries/XmPciLpEvent.h>
-
-static unsigned int iSeries_startup_IRQ(unsigned int irq);
-static void iSeries_shutdown_IRQ(unsigned int irq);
-static void iSeries_enable_IRQ(unsigned int irq);
-static void iSeries_disable_IRQ(unsigned int irq);
-static void iSeries_end_IRQ(unsigned int irq);
-
-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
-};
/* This maps virtual irq numbers to real irqs */
unsigned int virt_irq_to_real_map[NR_IRQS];
@@ -62,37 +49,187 @@ unsigned int virt_irq_to_real_map[NR_IRQS];
/* Note: the pcnet32 driver assumes irq numbers < 2 aren't valid. :( */
static int next_virtual_irq = 2;
-/* This is called by init_IRQ. set in ppc_md.init_IRQ by iSeries_setup.c */
-void __init iSeries_init_IRQ(void)
+static long Pci_Interrupt_Count;
+static long Pci_Event_Count;
+
+enum XmPciLpEvent_Subtype {
+ XmPciLpEvent_BusCreated = 0, // PHB has been created
+ XmPciLpEvent_BusError = 1, // PHB has failed
+ XmPciLpEvent_BusFailed = 2, // Msg to Secondary, Primary failed bus
+ XmPciLpEvent_NodeFailed = 4, // Multi-adapter bridge has failed
+ XmPciLpEvent_NodeRecovered = 5, // Multi-adapter bridge has recovered
+ XmPciLpEvent_BusRecovered = 12, // PHB has been recovered
+ XmPciLpEvent_UnQuiesceBus = 18, // Secondary bus unqiescing
+ XmPciLpEvent_BridgeError = 21, // Bridge Error
+ XmPciLpEvent_SlotInterrupt = 22 // Slot interrupt
+};
+
+struct XmPciLpEvent_BusInterrupt {
+ HvBusNumber busNumber;
+ HvSubBusNumber subBusNumber;
+};
+
+struct XmPciLpEvent_NodeInterrupt {
+ HvBusNumber busNumber;
+ HvSubBusNumber subBusNumber;
+ HvAgentId deviceId;
+};
+
+struct XmPciLpEvent {
+ struct HvLpEvent hvLpEvent;
+
+ union {
+ u64 alignData; // Align on an 8-byte boundary
+
+ struct {
+ u32 fisr;
+ HvBusNumber busNumber;
+ HvSubBusNumber subBusNumber;
+ HvAgentId deviceId;
+ } slotInterrupt;
+
+ struct XmPciLpEvent_BusInterrupt busFailed;
+ struct XmPciLpEvent_BusInterrupt busRecovered;
+ struct XmPciLpEvent_BusInterrupt busCreated;
+
+ struct XmPciLpEvent_NodeInterrupt nodeFailed;
+ struct XmPciLpEvent_NodeInterrupt nodeRecovered;
+
+ } eventData;
+
+};
+
+static void intReceived(struct XmPciLpEvent *eventParm,
+ struct pt_regs *regsParm)
{
- /* Register PCI event handler and open an event path */
- XmPciLpEvent_init();
+ int irq;
+
+ ++Pci_Interrupt_Count;
+
+ switch (eventParm->hvLpEvent.xSubtype) {
+ case XmPciLpEvent_SlotInterrupt:
+ irq = eventParm->hvLpEvent.xCorrelationToken;
+ /* Dispatch the interrupt handlers for this irq */
+ ppc_irq_dispatch_handler(regsParm, irq);
+ HvCallPci_eoi(eventParm->eventData.slotInterrupt.busNumber,
+ eventParm->eventData.slotInterrupt.subBusNumber,
+ eventParm->eventData.slotInterrupt.deviceId);
+ break;
+ /* Ignore error recovery events for now */
+ case XmPciLpEvent_BusCreated:
+ printk(KERN_INFO "intReceived: system bus %d created\n",
+ eventParm->eventData.busCreated.busNumber);
+ break;
+ case XmPciLpEvent_BusError:
+ case XmPciLpEvent_BusFailed:
+ printk(KERN_INFO "intReceived: system bus %d failed\n",
+ eventParm->eventData.busFailed.busNumber);
+ break;
+ case XmPciLpEvent_BusRecovered:
+ case XmPciLpEvent_UnQuiesceBus:
+ printk(KERN_INFO "intReceived: system bus %d recovered\n",
+ eventParm->eventData.busRecovered.busNumber);
+ break;
+ case XmPciLpEvent_NodeFailed:
+ case XmPciLpEvent_BridgeError:
+ printk(KERN_INFO
+ "intReceived: multi-adapter bridge %d/%d/%d failed\n",
+ eventParm->eventData.nodeFailed.busNumber,
+ eventParm->eventData.nodeFailed.subBusNumber,
+ eventParm->eventData.nodeFailed.deviceId);
+ break;
+ case XmPciLpEvent_NodeRecovered:
+ printk(KERN_INFO
+ "intReceived: multi-adapter bridge %d/%d/%d recovered\n",
+ eventParm->eventData.nodeRecovered.busNumber,
+ eventParm->eventData.nodeRecovered.subBusNumber,
+ eventParm->eventData.nodeRecovered.deviceId);
+ break;
+ default:
+ printk(KERN_ERR
+ "intReceived: unrecognized event subtype 0x%x\n",
+ eventParm->hvLpEvent.xSubtype);
+ break;
+ }
+}
+
+static void XmPciLpEvent_handler(struct HvLpEvent *eventParm,
+ struct pt_regs *regsParm)
+{
+#ifdef CONFIG_PCI
+ ++Pci_Event_Count;
+
+ if (eventParm && (eventParm->xType == HvLpEvent_Type_PciIo)) {
+ switch (eventParm->xFlags.xFunction) {
+ case HvLpEvent_Function_Int:
+ intReceived((struct XmPciLpEvent *)eventParm, regsParm);
+ break;
+ case HvLpEvent_Function_Ack:
+ printk(KERN_ERR
+ "XmPciLpEvent_handler: unexpected ack received\n");
+ break;
+ default:
+ printk(KERN_ERR
+ "XmPciLpEvent_handler: unexpected event function %d\n",
+ (int)eventParm->xFlags.xFunction);
+ break;
+ }
+ } else if (eventParm)
+ printk(KERN_ERR
+ "XmPciLpEvent_handler: Unrecognized PCI event type 0x%x\n",
+ (int)eventParm->xType);
+ else
+ printk(KERN_ERR "XmPciLpEvent_handler: NULL event received\n");
+#endif
}
/*
- * This is called out of iSeries_scan_slot to allocate an IRQ for an EADS slot
- * It calculates the irq value for the slot.
- * Note that subBusNumber is always 0 (at the moment at least).
+ * This is called by init_IRQ. set in ppc_md.init_IRQ by iSeries_setup.c
+ * It must be called before the bus walk.
*/
-int __init iSeries_allocate_IRQ(HvBusNumber busNumber,
- HvSubBusNumber subBusNumber, HvAgentId deviceId)
+void __init iSeries_init_IRQ(void)
{
- unsigned int realirq, virtirq;
- u8 idsel = (deviceId >> 4);
- u8 function = deviceId & 7;
-
- virtirq = next_virtual_irq++;
- realirq = ((busNumber - 1) << 6) + ((idsel - 1) << 3) + function;
- virt_irq_to_real_map[virtirq] = realirq;
+ /* Register PCI event handler and open an event path */
+ int xRc;
- irq_desc[virtirq].handler = &iSeries_IRQ_handler;
- return virtirq;
+ xRc = HvLpEvent_registerHandler(HvLpEvent_Type_PciIo,
+ &XmPciLpEvent_handler);
+ if (xRc == 0) {
+ xRc = HvLpEvent_openPath(HvLpEvent_Type_PciIo, 0);
+ if (xRc != 0)
+ printk(KERN_ERR "iSeries_init_IRQ: open event path "
+ "failed with rc 0x%x\n", xRc);
+ } else
+ printk(KERN_ERR "iSeries_init_IRQ: register handler "
+ "failed with rc 0x%x\n", xRc);
}
#define REAL_IRQ_TO_BUS(irq) ((((irq) >> 6) & 0xff) + 1)
#define REAL_IRQ_TO_IDSEL(irq) ((((irq) >> 3) & 7) + 1)
#define REAL_IRQ_TO_FUNC(irq) ((irq) & 7)
+/*
+ * This will be called by device drivers (via enable_IRQ)
+ * to enable INTA in the bridge interrupt status register.
+ */
+static void iSeries_enable_IRQ(unsigned int irq)
+{
+ u32 bus, deviceId, function, mask;
+ const u32 subBus = 0;
+ unsigned int rirq = virt_irq_to_real_map[irq];
+
+ /* The IRQ has already been locked by the caller */
+ bus = REAL_IRQ_TO_BUS(rirq);
+ function = REAL_IRQ_TO_FUNC(rirq);
+ deviceId = (REAL_IRQ_TO_IDSEL(rirq) << 4) + function;
+
+ /* Unmask secondary INTA */
+ mask = 0x80000000;
+ HvCallPci_unmaskInterrupts(bus, subBus, deviceId, mask);
+ PPCDBG(PPCDBG_BUSWALK, "iSeries_enable_IRQ 0x%02X.%02X.%02X 0x%04X\n",
+ bus, subBus, deviceId, irq);
+}
+
/* This is called by iSeries_activate_IRQs */
static unsigned int iSeries_startup_IRQ(unsigned int irq)
{
@@ -131,7 +268,7 @@ void __init iSeries_activate_IRQs()
desc->handler->startup(irq);
spin_unlock_irqrestore(&desc->lock, flags);
}
- }
+ }
}
/* this is not called anywhere currently */
@@ -173,29 +310,7 @@ static void iSeries_disable_IRQ(unsigned int irq)
mask = 0x80000000;
HvCallPci_maskInterrupts(bus, subBus, deviceId, mask);
PPCDBG(PPCDBG_BUSWALK, "iSeries_disable_IRQ 0x%02X.%02X.%02X 0x%04X\n",
- bus, subBus, deviceId, irq);
-}
-
-/*
- * This will be called by device drivers (via enable_IRQ)
- * to enable INTA in the bridge interrupt status register.
- */
-static void iSeries_enable_IRQ(unsigned int irq)
-{
- u32 bus, deviceId, function, mask;
- const u32 subBus = 0;
- unsigned int rirq = virt_irq_to_real_map[irq];
-
- /* The IRQ has already been locked by the caller */
- bus = REAL_IRQ_TO_BUS(rirq);
- function = REAL_IRQ_TO_FUNC(rirq);
- deviceId = (REAL_IRQ_TO_IDSEL(rirq) << 4) + function;
-
- /* Unmask secondary INTA */
- mask = 0x80000000;
- HvCallPci_unmaskInterrupts(bus, subBus, deviceId, mask);
- PPCDBG(PPCDBG_BUSWALK, "iSeries_enable_IRQ 0x%02X.%02X.%02X 0x%04X\n",
- bus, subBus, deviceId, irq);
+ bus, subBus, deviceId, irq);
}
/*
@@ -207,3 +322,32 @@ static void iSeries_enable_IRQ(unsigned int irq)
static void iSeries_end_IRQ(unsigned int irq)
{
}
+
+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
+};
+
+/*
+ * This is called out of iSeries_scan_slot to allocate an IRQ for an EADS slot
+ * It calculates the irq value for the slot.
+ * Note that subBusNumber is always 0 (at the moment at least).
+ */
+int __init iSeries_allocate_IRQ(HvBusNumber busNumber,
+ HvSubBusNumber subBusNumber, HvAgentId deviceId)
+{
+ unsigned int realirq, virtirq;
+ u8 idsel = (deviceId >> 4);
+ u8 function = deviceId & 7;
+
+ virtirq = next_virtual_irq++;
+ realirq = ((busNumber - 1) << 6) + ((idsel - 1) << 3) + function;
+ virt_irq_to_real_map[virtirq] = realirq;
+
+ irq_desc[virtirq].handler = &iSeries_IRQ_handler;
+ return virtirq;
+}