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Diffstat (limited to 'arch/ppc64/kernel/iSeries_irq.c')
-rw-r--r--arch/ppc64/kernel/iSeries_irq.c155
1 files changed, 74 insertions, 81 deletions
diff --git a/arch/ppc64/kernel/iSeries_irq.c b/arch/ppc64/kernel/iSeries_irq.c
index f831d259dbb7..41902e358e76 100644
--- a/arch/ppc64/kernel/iSeries_irq.c
+++ b/arch/ppc64/kernel/iSeries_irq.c
@@ -1,27 +1,27 @@
-/************************************************************************/
-/* 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>
+ *
+ * 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/pci.h>
#include <linux/init.h>
#include <linux/threads.h>
@@ -38,22 +38,6 @@
#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];
@@ -69,30 +53,32 @@ void __init iSeries_init_IRQ(void)
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
- * It calculates the irq value for the slot.
- * Note that subBusNumber is always 0 (at the moment at least).
+ * This will be called by device drivers (via enable_IRQ)
+ * to enable INTA in the bridge interrupt status register.
*/
-int __init iSeries_allocate_IRQ(HvBusNumber busNumber,
- HvSubBusNumber subBusNumber, HvAgentId deviceId)
+static void iSeries_enable_IRQ(unsigned int irq)
{
- unsigned int realirq, virtirq;
- u8 idsel = (deviceId >> 4);
- u8 function = deviceId & 7;
+ u32 bus, deviceId, function, mask;
+ const u32 subBus = 0;
+ unsigned int rirq = virt_irq_to_real_map[irq];
- virtirq = next_virtual_irq++;
- realirq = ((busNumber - 1) << 6) + ((idsel - 1) << 3) + function;
- virt_irq_to_real_map[virtirq] = realirq;
+ /* 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;
- irq_desc[virtirq].handler = &iSeries_IRQ_handler;
- return virtirq;
+ /* 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);
}
-#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 */
static unsigned int iSeries_startup_IRQ(unsigned int irq)
{
@@ -131,7 +117,7 @@ void __init iSeries_activate_IRQs()
desc->handler->startup(irq);
spin_unlock_irqrestore(&desc->lock, flags);
}
- }
+ }
}
/* this is not called anywhere currently */
@@ -173,29 +159,7 @@ 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 +171,32 @@ 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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 03:58:34 +0000