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[PATCH] PCI: per-platform IA64_{FIRST,LAST}_DEVICE_VECTOR definitions

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Abstract IA64_FIRST_DEVICE_VECTOR/IA64_LAST_DEVICE_VECTOR since SN platforms
use a subset of the IA64 range.  Implement this by making the above macros
global variables which the platform can override in it setup code.

Also add a reserve_irq_vector() routine used by SN to mark a vector's as
in-use when that weren't allocated through assign_irq_vector().

Signed-off-by: Mark Maule <maule@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Mark Maule 2006-04-14 16:03:49 -05:00 committed by Greg Kroah-Hartman
parent fd58e55fcf
commit 10083072bf
4 changed files with 43 additions and 4 deletions
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19
arch/ia64/kernel/irq_ia64.c
View file

@ -46,6 +46,10 @@
#define IRQ_DEBUG 0
/* These can be overridden in platform_irq_init */
int ia64_first_device_vector = IA64_DEF_FIRST_DEVICE_VECTOR;
int ia64_last_device_vector = IA64_DEF_LAST_DEVICE_VECTOR;
/* default base addr of IPI table */
void __iomem *ipi_base_addr = ((void __iomem *)
(__IA64_UNCACHED_OFFSET | IA64_IPI_DEFAULT_BASE_ADDR));
@ -60,7 +64,7 @@ __u8 isa_irq_to_vector_map[16] = {
};
EXPORT_SYMBOL(isa_irq_to_vector_map);
static unsigned long ia64_vector_mask[BITS_TO_LONGS(IA64_NUM_DEVICE_VECTORS)];
static unsigned long ia64_vector_mask[BITS_TO_LONGS(IA64_MAX_DEVICE_VECTORS)];
int
assign_irq_vector (int irq)
@ -89,6 +93,19 @@ free_irq_vector (int vector)
printk(KERN_WARNING "%s: double free!\n", __FUNCTION__);
}
int
reserve_irq_vector (int vector)
{
int pos;
if (vector < IA64_FIRST_DEVICE_VECTOR ||
vector > IA64_LAST_DEVICE_VECTOR)
return -EINVAL;
pos = vector - IA64_FIRST_DEVICE_VECTOR;
return test_and_set_bit(pos, ia64_vector_mask);
}
#ifdef CONFIG_SMP
# define IS_RESCHEDULE(vec) (vec == IA64_IPI_RESCHEDULE)
#else

7
arch/ia64/sn/kernel/irq.c
View file

@ -202,6 +202,9 @@ void sn_irq_init(void)
int i;
irq_desc_t *base_desc = irq_desc;
ia64_first_device_vector = IA64_SN2_FIRST_DEVICE_VECTOR;
ia64_last_device_vector = IA64_SN2_LAST_DEVICE_VECTOR;
for (i = 0; i < NR_IRQS; i++) {
if (base_desc[i].handler == &no_irq_type) {
base_desc[i].handler = &irq_type_sn;
@ -285,6 +288,7 @@ void sn_irq_fixup(struct pci_dev *pci_dev, struct sn_irq_info *sn_irq_info)
/* link it into the sn_irq[irq] list */
spin_lock(&sn_irq_info_lock);
list_add_rcu(&sn_irq_info->list, sn_irq_lh[sn_irq_info->irq_irq]);
reserve_irq_vector(sn_irq_info->irq_irq);
spin_unlock(&sn_irq_info_lock);
register_intr_pda(sn_irq_info);
@ -310,8 +314,11 @@ void sn_irq_unfixup(struct pci_dev *pci_dev)
spin_lock(&sn_irq_info_lock);
list_del_rcu(&sn_irq_info->list);
spin_unlock(&sn_irq_info_lock);
if (list_empty(sn_irq_lh[sn_irq_info->irq_irq]))
free_irq_vector(sn_irq_info->irq_irq);
call_rcu(&sn_irq_info->rcu, sn_irq_info_free);
pci_dev_put(pci_dev);
}
static inline void

6
drivers/pci/msi.c
View file

@ -35,7 +35,7 @@ static int nr_msix_devices;
#ifndef CONFIG_X86_IO_APIC
int vector_irq[NR_VECTORS] = { [0 ... NR_VECTORS - 1] = -1};
u8 irq_vector[NR_IRQ_VECTORS] = { FIRST_DEVICE_VECTOR , 0 };
u8 irq_vector[NR_IRQ_VECTORS];
#endif
static struct msi_ops *msi_ops;
@ -383,6 +383,10 @@ static int msi_init(void)
return status;
}
#ifndef CONFIG_X86_IO_APIC
irq_vector[0] = FIRST_DEVICE_VECTOR;
#endif
if (last_alloc_vector < 0) {
pci_msi_enable = 0;
printk(KERN_WARNING "PCI: No interrupt vectors available for MSI\n");

15
include/asm-ia64/hw_irq.h
View file

@ -47,9 +47,19 @@ typedef u8 ia64_vector;
#define IA64_CMC_VECTOR 0x1f /* corrected machine-check interrupt vector */
/*
* Vectors 0x20-0x2f are reserved for legacy ISA IRQs.
* Use vectors 0x30-0xe7 as the default device vector range for ia64.
* Platforms may choose to reduce this range in platform_irq_setup, but the
* platform range must fall within
* [IA64_DEF_FIRST_DEVICE_VECTOR..IA64_DEF_LAST_DEVICE_VECTOR]
*/
#define IA64_FIRST_DEVICE_VECTOR 0x30
#define IA64_LAST_DEVICE_VECTOR 0xe7
extern int ia64_first_device_vector;
extern int ia64_last_device_vector;
#define IA64_DEF_FIRST_DEVICE_VECTOR 0x30
#define IA64_DEF_LAST_DEVICE_VECTOR 0xe7
#define IA64_FIRST_DEVICE_VECTOR ia64_first_device_vector
#define IA64_LAST_DEVICE_VECTOR ia64_last_device_vector
#define IA64_MAX_DEVICE_VECTORS (IA64_DEF_LAST_DEVICE_VECTOR - IA64_DEF_FIRST_DEVICE_VECTOR + 1)
#define IA64_NUM_DEVICE_VECTORS (IA64_LAST_DEVICE_VECTOR - IA64_FIRST_DEVICE_VECTOR + 1)
#define IA64_MCA_RENDEZ_VECTOR 0xe8 /* MCA rendez interrupt */
@ -83,6 +93,7 @@ extern struct hw_interrupt_type irq_type_ia64_lsapic; /* CPU-internal interrupt
extern int assign_irq_vector (int irq); /* allocate a free vector */
extern void free_irq_vector (int vector);
extern int reserve_irq_vector (int vector);
extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect);
extern void register_percpu_irq (ia64_vector vec, struct irqaction *action);