No need for a private allocator. The core code handles it
already.
Allocate the non MSI irqs right at boot time via machine_desc->nr_irqs
and let the sparse core handle the MSI space.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
---
arch/arm/Kconfig | 1
arch/arm/mach-iop13xx/include/mach/irqs.h | 2 -
arch/arm/mach-iop13xx/include/mach/time.h | 3 +
arch/arm/mach-iop13xx/iq81340mc.c | 1
arch/arm/mach-iop13xx/iq81340sc.c | 1
arch/arm/mach-iop13xx/msi.c | 51 ++++++------------------------
arch/arm/mach-iop13xx/setup.c | 1
arch/arm/mach-iop13xx/tpmi.c | 1
8 files changed, 19 insertions(+), 42 deletions(-)
Index: tip/arch/arm/Kconfig
===================================================================
--- tip.orig/arch/arm/Kconfig
+++ tip/arch/arm/Kconfig
@@ -480,6 +480,7 @@ config ARCH_IOP13XX
select PCI
select PLAT_IOP
select VMSPLIT_1G
+ select SPARSE_IRQ
help
Support for Intel's IOP13XX (XScale) family of processors.
Index: tip/arch/arm/mach-iop13xx/include/mach/irqs.h
===================================================================
--- tip.orig/arch/arm/mach-iop13xx/include/mach/irqs.h
+++ tip/arch/arm/mach-iop13xx/include/mach/irqs.h
@@ -191,6 +191,4 @@ static inline u32 read_intpnd_3(void)
#define NR_IOP13XX_IRQS (IRQ_IOP13XX_HPI + 1)
#endif
-#define NR_IRQS NR_IOP13XX_IRQS
-
#endif /* _IOP13XX_IRQ_H_ */
Index: tip/arch/arm/mach-iop13xx/include/mach/time.h
===================================================================
--- tip.orig/arch/arm/mach-iop13xx/include/mach/time.h
+++ tip/arch/arm/mach-iop13xx/include/mach/time.h
@@ -1,5 +1,8 @@
#ifndef _IOP13XX_TIME_H_
#define _IOP13XX_TIME_H_
+
+#include <mach/irqs.h>
+
#define IRQ_IOP_TIMER0 IRQ_IOP13XX_TIMER0
#define IOP_TMR_EN 0x02
Index: tip/arch/arm/mach-iop13xx/iq81340mc.c
===================================================================
--- tip.orig/arch/arm/mach-iop13xx/iq81340mc.c
+++ tip/arch/arm/mach-iop13xx/iq81340mc.c
@@ -93,4 +93,5 @@ MACHINE_START(IQ81340MC, "Intel IQ81340M
.init_time = iq81340mc_timer_init,
.init_machine = iq81340mc_init,
.restart = iop13xx_restart,
+ .nr_irqs = NR_IOP13XX_IRQS,
MACHINE_END
Index: tip/arch/arm/mach-iop13xx/iq81340sc.c
===================================================================
--- tip.orig/arch/arm/mach-iop13xx/iq81340sc.c
+++ tip/arch/arm/mach-iop13xx/iq81340sc.c
@@ -95,4 +95,5 @@ MACHINE_START(IQ81340SC, "Intel IQ81340S
.init_time = iq81340sc_timer_init,
.init_machine = iq81340sc_init,
.restart = iop13xx_restart,
+ .nr_irqs = NR_IOP13XX_IRQS,
MACHINE_END
Index: tip/arch/arm/mach-iop13xx/msi.c
===================================================================
--- tip.orig/arch/arm/mach-iop13xx/msi.c
+++ tip/arch/arm/mach-iop13xx/msi.c
@@ -24,10 +24,6 @@
#include <asm/mach/irq.h>
#include <asm/irq.h>
-
-#define IOP13XX_NUM_MSI_IRQS 128
-static DECLARE_BITMAP(msi_irq_in_use, IOP13XX_NUM_MSI_IRQS);
-
/* IMIPR0 CP6 R8 Page 1
*/
static u32 read_imipr_0(void)
@@ -121,41 +117,6 @@ void __init iop13xx_msi_init(void)
irq_set_chained_handler(IRQ_IOP13XX_INBD_MSI, iop13xx_msi_handler);
}
-/*
- * Dynamic irq allocate and deallocation
- */
-int create_irq(void)
-{
- int irq, pos;
-
-again:
- pos = find_first_zero_bit(msi_irq_in_use, IOP13XX_NUM_MSI_IRQS);
- irq = IRQ_IOP13XX_MSI_0 + pos;
- if (irq > NR_IRQS)
- return -ENOSPC;
- /* test_and_set_bit operates on 32-bits at a time */
- if (test_and_set_bit(pos, msi_irq_in_use))
- goto again;
-
- dynamic_irq_init(irq);
-
- return irq;
-}
-
-void destroy_irq(unsigned int irq)
-{
- int pos = irq - IRQ_IOP13XX_MSI_0;
-
- dynamic_irq_cleanup(irq);
-
- clear_bit(pos, msi_irq_in_use);
-}
-
-void arch_teardown_msi_irq(unsigned int irq)
-{
- destroy_irq(irq);
-}
-
static void iop13xx_msi_nop(struct irq_data *d)
{
return;
@@ -172,12 +133,17 @@ static struct irq_chip iop13xx_msi_chip
int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
{
- int id, irq = create_irq();
+ int id, irq = irq_alloc_desc_from(IRQ_IOP13XX_MSI_0, -1);
struct msi_msg msg;
if (irq < 0)
return irq;
+ if (irq >= NR_IOP13XX_IRQS) {
+ irq_free_desc(irq);
+ return -ENOSPC;
+ }
+
irq_set_msi_desc(irq, desc);
msg.address_hi = 0x0;
@@ -191,3 +157,8 @@ int arch_setup_msi_irq(struct pci_dev *p
return 0;
}
+
+void arch_teardown_msi_irq(unsigned int irq)
+{
+ irq_free_desc(irq);
+}
Index: tip/arch/arm/mach-iop13xx/setup.c
===================================================================
--- tip.orig/arch/arm/mach-iop13xx/setup.c
+++ tip/arch/arm/mach-iop13xx/setup.c
@@ -27,6 +27,7 @@
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/hardware/iop_adma.h>
+#include <mach/irqs.h>
#define IOP13XX_UART_XTAL 33334000
#define IOP13XX_SETUP_DEBUG 0
Index: tip/arch/arm/mach-iop13xx/tpmi.c
===================================================================
--- tip.orig/arch/arm/mach-iop13xx/tpmi.c
+++ tip/arch/arm/mach-iop13xx/tpmi.c
@@ -24,6 +24,7 @@
#include <linux/io.h>
#include <asm/irq.h>
#include <asm/sizes.h>
+#include <mach/irqs.h>
/* assumes CONTROLLER_ONLY# is never asserted in the ESSR register */
#define IOP13XX_TPMI_MMR(dev) IOP13XX_REG_ADDR32_PHYS(0x48000 + (dev << 12))
--
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