forked from luck/tmp_suning_uos_patched
54d5d42404
When handling writes to /proc/irq, current code is re-programming rte entries directly. This is not recommended and could potentially cause chipset's to lockup, or cause missing interrupts. CONFIG_IRQ_BALANCE does this correctly, where it re-programs only when the interrupt is pending. The same needs to be done for /proc/irq handling as well. Otherwise user space irq balancers are really not doing the right thing. - Changed pending_irq_balance_cpumask to pending_irq_migrate_cpumask for lack of a generic name. - added move_irq out of IRQ_BALANCE, and added this same to X86_64 - Added new proc handler for write, so we can do deferred write at irq handling time. - Display of /proc/irq/XX/smp_affinity used to display CPU_MASKALL, instead it now shows only active cpu masks, or exactly what was set. - Provided a common move_irq implementation, instead of duplicating when using generic irq framework. Tested on i386/x86_64 and ia64 with CONFIG_PCI_MSI turned on and off. Tested UP builds as well. MSI testing: tbd: I have cards, need to look for a x-over cable, although I did test an earlier version of this patch. Will test in a couple days. Signed-off-by: Ashok Raj <ashok.raj@intel.com> Acked-by: Zwane Mwaikambo <zwane@holomorphy.com> Grudgingly-acked-by: Andi Kleen <ak@muc.de> Signed-off-by: Coywolf Qi Hunt <coywolf@lovecn.org> Signed-off-by: Ashok Raj <ashok.raj@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
138 lines
4.2 KiB
C
138 lines
4.2 KiB
C
#ifndef _ASM_IA64_HW_IRQ_H
|
|
#define _ASM_IA64_HW_IRQ_H
|
|
|
|
/*
|
|
* Copyright (C) 2001-2003 Hewlett-Packard Co
|
|
* David Mosberger-Tang <davidm@hpl.hp.com>
|
|
*/
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/types.h>
|
|
#include <linux/profile.h>
|
|
|
|
#include <asm/machvec.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/smp.h>
|
|
|
|
typedef u8 ia64_vector;
|
|
|
|
/*
|
|
* 0 special
|
|
*
|
|
* 1,3-14 are reserved from firmware
|
|
*
|
|
* 16-255 (vectored external interrupts) are available
|
|
*
|
|
* 15 spurious interrupt (see IVR)
|
|
*
|
|
* 16 lowest priority, 255 highest priority
|
|
*
|
|
* 15 classes of 16 interrupts each.
|
|
*/
|
|
#define IA64_MIN_VECTORED_IRQ 16
|
|
#define IA64_MAX_VECTORED_IRQ 255
|
|
#define IA64_NUM_VECTORS 256
|
|
|
|
#define AUTO_ASSIGN -1
|
|
|
|
#define IA64_SPURIOUS_INT_VECTOR 0x0f
|
|
|
|
/*
|
|
* Vectors 0x10-0x1f are used for low priority interrupts, e.g. CMCI.
|
|
*/
|
|
#define IA64_CPEP_VECTOR 0x1c /* corrected platform error polling vector */
|
|
#define IA64_CMCP_VECTOR 0x1d /* corrected machine-check polling vector */
|
|
#define IA64_CPE_VECTOR 0x1e /* corrected platform error interrupt vector */
|
|
#define IA64_CMC_VECTOR 0x1f /* corrected machine-check interrupt vector */
|
|
/*
|
|
* Vectors 0x20-0x2f are reserved for legacy ISA IRQs.
|
|
*/
|
|
#define IA64_FIRST_DEVICE_VECTOR 0x30
|
|
#define IA64_LAST_DEVICE_VECTOR 0xe7
|
|
#define IA64_NUM_DEVICE_VECTORS (IA64_LAST_DEVICE_VECTOR - IA64_FIRST_DEVICE_VECTOR + 1)
|
|
|
|
#define IA64_MCA_RENDEZ_VECTOR 0xe8 /* MCA rendez interrupt */
|
|
#define IA64_PERFMON_VECTOR 0xee /* performanc monitor interrupt vector */
|
|
#define IA64_TIMER_VECTOR 0xef /* use highest-prio group 15 interrupt for timer */
|
|
#define IA64_MCA_WAKEUP_VECTOR 0xf0 /* MCA wakeup (must be >MCA_RENDEZ_VECTOR) */
|
|
#define IA64_IPI_RESCHEDULE 0xfd /* SMP reschedule */
|
|
#define IA64_IPI_VECTOR 0xfe /* inter-processor interrupt vector */
|
|
|
|
/* Used for encoding redirected irqs */
|
|
|
|
#define IA64_IRQ_REDIRECTED (1 << 31)
|
|
|
|
/* IA64 inter-cpu interrupt related definitions */
|
|
|
|
#define IA64_IPI_DEFAULT_BASE_ADDR 0xfee00000
|
|
|
|
/* Delivery modes for inter-cpu interrupts */
|
|
enum {
|
|
IA64_IPI_DM_INT = 0x0, /* pend an external interrupt */
|
|
IA64_IPI_DM_PMI = 0x2, /* pend a PMI */
|
|
IA64_IPI_DM_NMI = 0x4, /* pend an NMI (vector 2) */
|
|
IA64_IPI_DM_INIT = 0x5, /* pend an INIT interrupt */
|
|
IA64_IPI_DM_EXTINT = 0x7, /* pend an 8259-compatible interrupt. */
|
|
};
|
|
|
|
extern __u8 isa_irq_to_vector_map[16];
|
|
#define isa_irq_to_vector(x) isa_irq_to_vector_map[(x)]
|
|
|
|
extern struct hw_interrupt_type irq_type_ia64_lsapic; /* CPU-internal interrupt controller */
|
|
|
|
extern int assign_irq_vector (int irq); /* allocate a free vector */
|
|
extern void free_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);
|
|
|
|
static inline void
|
|
hw_resend_irq (struct hw_interrupt_type *h, unsigned int vector)
|
|
{
|
|
platform_send_ipi(smp_processor_id(), vector, IA64_IPI_DM_INT, 0);
|
|
}
|
|
|
|
/*
|
|
* Default implementations for the irq-descriptor API:
|
|
*/
|
|
|
|
extern irq_desc_t irq_desc[NR_IRQS];
|
|
|
|
#ifndef CONFIG_IA64_GENERIC
|
|
static inline unsigned int
|
|
__ia64_local_vector_to_irq (ia64_vector vec)
|
|
{
|
|
return (unsigned int) vec;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Next follows the irq descriptor interface. On IA-64, each CPU supports 256 interrupt
|
|
* vectors. On smaller systems, there is a one-to-one correspondence between interrupt
|
|
* vectors and the Linux irq numbers. However, larger systems may have multiple interrupt
|
|
* domains meaning that the translation from vector number to irq number depends on the
|
|
* interrupt domain that a CPU belongs to. This API abstracts such platform-dependent
|
|
* differences and provides a uniform means to translate between vector and irq numbers
|
|
* and to obtain the irq descriptor for a given irq number.
|
|
*/
|
|
|
|
/* Extract the IA-64 vector that corresponds to IRQ. */
|
|
static inline ia64_vector
|
|
irq_to_vector (int irq)
|
|
{
|
|
return (ia64_vector) irq;
|
|
}
|
|
|
|
/*
|
|
* Convert the local IA-64 vector to the corresponding irq number. This translation is
|
|
* done in the context of the interrupt domain that the currently executing CPU belongs
|
|
* to.
|
|
*/
|
|
static inline unsigned int
|
|
local_vector_to_irq (ia64_vector vec)
|
|
{
|
|
return platform_local_vector_to_irq(vec);
|
|
}
|
|
|
|
#endif /* _ASM_IA64_HW_IRQ_H */
|