Commit 0c3b4f1a authored by Stephen Rothwell's avatar Stephen Rothwell Committed by Linus Torvalds
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[PATCH] ppc64 iSeries: irq simple cleanups



This patch is just simple cleanups to the iSeries irq code.
	- whitespace and comments
	- rearrange some functions to avoid forward declarations
	- remove XmPciLpEvent.h as its functions were declared elsewhere
	- remove decaration of function that no longer exists
No semantic changes.
Signed-off-by: default avatarStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 061c063e
/* /*
* File XmPciLpEvent.h created by Wayne Holm on Mon Jan 15 2001. * File XmPciLpEvent.c created by Wayne Holm on Mon Jan 15 2001.
* *
* This module handles PCI interrupt events sent by the iSeries Hypervisor. * This module handles PCI interrupt events sent by the iSeries Hypervisor.
*/ */
#include <linux/config.h> #include <linux/config.h>
#include <linux/pci.h> #include <linux/pci.h>
#include <linux/init.h> #include <linux/init.h>
...@@ -17,7 +16,7 @@ ...@@ -17,7 +16,7 @@
#include <asm/iSeries/HvTypes.h> #include <asm/iSeries/HvTypes.h>
#include <asm/iSeries/HvLpEvent.h> #include <asm/iSeries/HvLpEvent.h>
#include <asm/iSeries/HvCallPci.h> #include <asm/iSeries/HvCallPci.h>
#include <asm/iSeries/XmPciLpEvent.h> #include <asm/iSeries/iSeries_irq.h>
#include <asm/ppcdebug.h> #include <asm/ppcdebug.h>
static long Pci_Interrupt_Count; static long Pci_Interrupt_Count;
...@@ -70,43 +69,6 @@ struct XmPciLpEvent { ...@@ -70,43 +69,6 @@ struct XmPciLpEvent {
}; };
static void intReceived(struct XmPciLpEvent *eventParm,
struct pt_regs *regsParm);
static void XmPciLpEvent_handler(struct HvLpEvent *eventParm,
struct pt_regs *regsParm)
{
#ifdef CONFIG_PCI
#if 0
PPCDBG(PPCDBG_BUSWALK, "XmPciLpEvent_handler, type 0x%x\n",
eventParm->xType);
#endif
++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.c: unexpected ack received\n");
break;
default:
printk(KERN_ERR
"XmPciLpEvent.c: unexpected event function %d\n",
(int)eventParm->xFlags.xFunction);
break;
}
} else if (eventParm)
printk(KERN_ERR
"XmPciLpEvent.c: Unrecognized PCI event type 0x%x\n",
(int)eventParm->xType);
else
printk(KERN_ERR "XmPciLpEvent.c: NULL event received\n");
#endif
}
static void intReceived(struct XmPciLpEvent *eventParm, static void intReceived(struct XmPciLpEvent *eventParm,
struct pt_regs *regsParm) struct pt_regs *regsParm)
{ {
...@@ -164,6 +126,39 @@ static void intReceived(struct XmPciLpEvent *eventParm, ...@@ -164,6 +126,39 @@ static void intReceived(struct XmPciLpEvent *eventParm,
} }
} }
static void XmPciLpEvent_handler(struct HvLpEvent *eventParm,
struct pt_regs *regsParm)
{
#ifdef CONFIG_PCI
#if 0
PPCDBG(PPCDBG_BUSWALK, "XmPciLpEvent_handler, type 0x%x\n",
eventParm->xType);
#endif
++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.c: unexpected ack received\n");
break;
default:
printk(KERN_ERR
"XmPciLpEvent.c: unexpected event function %d\n",
(int)eventParm->xFlags.xFunction);
break;
}
} else if (eventParm)
printk(KERN_ERR
"XmPciLpEvent.c: Unrecognized PCI event type 0x%x\n",
(int)eventParm->xType);
else
printk(KERN_ERR "XmPciLpEvent.c: NULL event received\n");
#endif
}
/* This should be called sometime prior to buswalk (init_IRQ would be good) */ /* This should be called sometime prior to buswalk (init_IRQ would be good) */
int XmPciLpEvent_init() int XmPciLpEvent_init()
...@@ -179,12 +174,10 @@ int XmPciLpEvent_init() ...@@ -179,12 +174,10 @@ int XmPciLpEvent_init()
if (xRc == 0) { if (xRc == 0) {
xRc = HvLpEvent_openPath(HvLpEvent_Type_PciIo, 0); xRc = HvLpEvent_openPath(HvLpEvent_Type_PciIo, 0);
if (xRc != 0) if (xRc != 0)
printk(KERN_ERR printk(KERN_ERR "XmPciLpEvent.c: open event path "
"XmPciLpEvent.c: open event path failed with rc 0x%x\n", "failed with rc 0x%x\n", xRc);
xRc);
} else } else
printk(KERN_ERR printk(KERN_ERR "XmPciLpEvent.c: register handler "
"XmPciLpEvent.c: register handler failed with rc 0x%x\n", "failed with rc 0x%x\n", xRc);
xRc);
return xRc; return xRc;
} }
/************************************************************************/ /*
/* This module supports the iSeries PCI bus interrupt handling */ * This module supports the iSeries PCI bus interrupt handling
/* Copyright (C) 20yy <Robert L Holtorf> <IBM Corp> */ * Copyright (C) 20yy <Robert L Holtorf> <IBM Corp>
/* */ *
/* This program is free software; you can redistribute it and/or modify */ * 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 */ * it under the terms of the GNU General Public License as published by
/* the Free Software Foundation; either version 2 of the License, or */ * the Free Software Foundation; either version 2 of the License, or
/* (at your option) any later version. */ * (at your option) any later version.
/* */ *
/* This program is distributed in the hope that it will be useful, */ * This program is distributed in the hope that it will be useful,
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ * but WITHOUT ANY WARRANTY; without even the implied warranty of
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
/* GNU General Public License for more details. */ * GNU General Public License for more details.
/* */ *
/* You should have received a copy of the GNU General Public License */ * You should have received a copy of the GNU General Public License
/* along with this program; if not, write to the: */ * along with this program; if not, write to the:
/* Free Software Foundation, Inc., */ * Free Software Foundation, Inc.,
/* 59 Temple Place, Suite 330, */ * 59 Temple Place, Suite 330,
/* Boston, MA 02111-1307 USA */ * Boston, MA 02111-1307 USA
/************************************************************************/ *
/* Change Activity: */ * Change Activity:
/* Created, December 13, 2000 by Wayne Holm */ * Created, December 13, 2000 by Wayne Holm
/* End Change Activity */ * End Change Activity
/************************************************************************/ */
#include <linux/pci.h> #include <linux/pci.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/threads.h> #include <linux/threads.h>
...@@ -38,22 +38,6 @@ ...@@ -38,22 +38,6 @@
#include <asm/iSeries/HvCallPci.h> #include <asm/iSeries/HvCallPci.h>
#include <asm/iSeries/HvCallXm.h> #include <asm/iSeries/HvCallXm.h>
#include <asm/iSeries/iSeries_irq.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 */ /* This maps virtual irq numbers to real irqs */
unsigned int virt_irq_to_real_map[NR_IRQS]; unsigned int virt_irq_to_real_map[NR_IRQS];
...@@ -69,30 +53,32 @@ void __init iSeries_init_IRQ(void) ...@@ -69,30 +53,32 @@ void __init iSeries_init_IRQ(void)
XmPciLpEvent_init(); XmPciLpEvent_init();
} }
#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 is called out of iSeries_scan_slot to allocate an IRQ for an EADS slot * This will be called by device drivers (via enable_IRQ)
* It calculates the irq value for the slot. * to enable INTA in the bridge interrupt status register.
* Note that subBusNumber is always 0 (at the moment at least).
*/ */
int __init iSeries_allocate_IRQ(HvBusNumber busNumber, static void iSeries_enable_IRQ(unsigned int irq)
HvSubBusNumber subBusNumber, HvAgentId deviceId)
{ {
unsigned int realirq, virtirq; u32 bus, deviceId, function, mask;
u8 idsel = (deviceId >> 4); const u32 subBus = 0;
u8 function = deviceId & 7; unsigned int rirq = virt_irq_to_real_map[irq];
virtirq = next_virtual_irq++; /* The IRQ has already been locked by the caller */
realirq = ((busNumber - 1) << 6) + ((idsel - 1) << 3) + function; bus = REAL_IRQ_TO_BUS(rirq);
virt_irq_to_real_map[virtirq] = realirq; function = REAL_IRQ_TO_FUNC(rirq);
deviceId = (REAL_IRQ_TO_IDSEL(rirq) << 4) + function;
irq_desc[virtirq].handler = &iSeries_IRQ_handler; /* Unmask secondary INTA */
return virtirq; 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);
} }
#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 is called by iSeries_activate_IRQs */ /* This is called by iSeries_activate_IRQs */
static unsigned int iSeries_startup_IRQ(unsigned int irq) static unsigned int iSeries_startup_IRQ(unsigned int irq)
{ {
...@@ -176,28 +162,6 @@ static void iSeries_disable_IRQ(unsigned int irq) ...@@ -176,28 +162,6 @@ static void iSeries_disable_IRQ(unsigned int irq)
bus, subBus, deviceId, irq); 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);
}
/* /*
* Need to define this so ppc_irq_dispatch_handler will NOT call * Need to define this so ppc_irq_dispatch_handler will NOT call
* enable_IRQ at the end of interrupt handling. However, this does * enable_IRQ at the end of interrupt handling. However, this does
...@@ -207,3 +171,32 @@ static void iSeries_enable_IRQ(unsigned int irq) ...@@ -207,3 +171,32 @@ static void iSeries_enable_IRQ(unsigned int irq)
static void iSeries_end_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;
}
#ifndef __XMPCILPEVENT_H__
#define __XMPCILPEVENT_H__
extern int XmPciLpEvent_init(void);
extern void ppc_irq_dispatch_handler(struct pt_regs *regs, int irq);
#endif /* __XMPCILPEVENT_H__ */
...@@ -3,7 +3,6 @@ ...@@ -3,7 +3,6 @@
extern void iSeries_init_IRQ(void); extern void iSeries_init_IRQ(void);
extern int iSeries_allocate_IRQ(HvBusNumber, HvSubBusNumber, HvAgentId); extern int iSeries_allocate_IRQ(HvBusNumber, HvSubBusNumber, HvAgentId);
extern int iSeries_assign_IRQ(int, HvBusNumber, HvSubBusNumber, HvAgentId);
extern void iSeries_activate_IRQs(void); extern void iSeries_activate_IRQs(void);
extern int XmPciLpEvent_init(void); extern int XmPciLpEvent_init(void);
......
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