apix_intr.c revision 636dfb4b6ac0749387c883053011a3afb4b4893b
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <sys/cpuvar.h>
#include <sys/cpu_event.h>
#include <sys/param.h>
#include <sys/cmn_err.h>
#include <sys/t_lock.h>
#include <sys/kmem.h>
#include <sys/machlock.h>
#include <sys/systm.h>
#include <sys/archsystm.h>
#include <sys/atomic.h>
#include <sys/sdt.h>
#include <sys/processor.h>
#include <sys/time.h>
#include <sys/psm.h>
#include <sys/smp_impldefs.h>
#include <sys/cram.h>
#include <sys/apic.h>
#include <sys/pit.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/ddi_impldefs.h>
#include <sys/pci.h>
#include <sys/promif.h>
#include <sys/x86_archext.h>
#include <sys/cpc_impl.h>
#include <sys/uadmin.h>
#include <sys/panic.h>
#include <sys/debug.h>
#include <sys/trap.h>
#include <sys/machsystm.h>
#include <sys/sysmacros.h>
#include <sys/rm_platter.h>
#include <sys/privregs.h>
#include <sys/note.h>
#include <sys/pci_intr_lib.h>
#include <sys/spl.h>
#include <sys/clock.h>
#include <sys/dditypes.h>
#include <sys/sunddi.h>
#include <sys/x_call.h>
#include <sys/reboot.h>
#include <vm/hat_i86.h>
#include <sys/stack.h>
#include <sys/apix.h>
static void apix_post_hardint(int);
/*
* Insert an vector into the tail of the interrupt pending list
*/
static __inline__ void
apix_insert_pending_av(apix_impl_t *apixp, struct autovec *avp, int ipl)
{
struct autovec **head = apixp->x_intr_head;
struct autovec **tail = apixp->x_intr_tail;
avp->av_ipl_link = NULL;
if (tail[ipl] == NULL) {
head[ipl] = tail[ipl] = avp;
return;
}
tail[ipl]->av_ipl_link = avp;
tail[ipl] = avp;
}
/*
* Remove and return an vector from the head of hardware interrupt
* pending list.
*/
static __inline__ struct autovec *
apix_remove_pending_av(apix_impl_t *apixp, int ipl)
{
struct cpu *cpu = CPU;
struct autovec **head = apixp->x_intr_head;
struct autovec **tail = apixp->x_intr_tail;
struct autovec *avp = head[ipl];
if (avp == NULL)
return (NULL);
if (avp->av_vector != NULL && avp->av_prilevel < cpu->cpu_base_spl) {
/*
* If there is blocked higher level interrupts, return
* NULL to quit handling of current IPL level.
*/
apixp->x_intr_pending |= (1 << avp->av_prilevel);
return (NULL);
}
avp->av_flags &= ~AV_PENTRY_PEND;
avp->av_flags |= AV_PENTRY_ONPROC;
head[ipl] = avp->av_ipl_link;
avp->av_ipl_link = NULL;
if (head[ipl] == NULL)
tail[ipl] = NULL;
return (avp);
}
/*
* add_pending_hardint:
*
* Add hardware interrupts to the interrupt pending list.
*/
static void
apix_add_pending_hardint(int vector)
{
uint32_t cpuid = psm_get_cpu_id();
apix_impl_t *apixp = apixs[cpuid];
apix_vector_t *vecp = apixp->x_vectbl[vector];
struct autovec *p, *prevp = NULL;
int ipl;
/*
* The MSI interrupt not supporting per-vector masking could
* be triggered on a false vector as a result of rebinding
* operation cannot programme MSI address & data atomically.
* Add ISR of this interrupt to the pending list for such
* suspicious interrupt.
*/
APIX_DO_FAKE_INTR(cpuid, vector);
if (vecp == NULL)
return;
for (p = vecp->v_autovect; p != NULL; p = p->av_link) {
if (p->av_vector == NULL)
continue; /* skip freed entry */
ipl = p->av_prilevel;
prevp = p;
/* set pending at specified priority level */
apixp->x_intr_pending |= (1 << ipl);
if (p->av_flags & AV_PENTRY_PEND)
continue; /* already in the pending list */
p->av_flags |= AV_PENTRY_PEND;
/* insert into pending list by it original IPL */
apix_insert_pending_av(apixp, p, ipl);
}
/* last one of the linked list */
if (prevp && ((prevp->av_flags & AV_PENTRY_LEVEL) != 0))
prevp->av_flags |= (vector & AV_PENTRY_VECTMASK);
}
/*
* Walk pending hardware interrupts at given priority level, invoking
* each interrupt handler as we go.
*/
extern uint64_t intr_get_time(void);
static void
apix_dispatch_pending_autovect(uint_t ipl)
{
uint32_t cpuid = psm_get_cpu_id();
apix_impl_t *apixp = apixs[cpuid];
struct autovec *av;
while ((av = apix_remove_pending_av(apixp, ipl)) != NULL) {
uint_t r;
uint_t (*intr)() = av->av_vector;
caddr_t arg1 = av->av_intarg1;
caddr_t arg2 = av->av_intarg2;
dev_info_t *dip = av->av_dip;
uchar_t vector = av->av_flags & AV_PENTRY_VECTMASK;
if (intr == NULL)
continue;
/* Don't enable interrupts during x-calls */
if (ipl != XC_HI_PIL)
sti();
DTRACE_PROBE4(interrupt__start, dev_info_t *, dip,
void *, intr, caddr_t, arg1, caddr_t, arg2);
r = (*intr)(arg1, arg2);
DTRACE_PROBE4(interrupt__complete, dev_info_t *, dip,
void *, intr, caddr_t, arg1, uint_t, r);
if (av->av_ticksp && av->av_prilevel <= LOCK_LEVEL)
atomic_add_64(av->av_ticksp, intr_get_time());
cli();
if (vector) {
if ((av->av_flags & AV_PENTRY_PEND) == 0)
av->av_flags &= ~AV_PENTRY_VECTMASK;
apix_post_hardint(vector);
}
/* mark it as idle */
av->av_flags &= ~AV_PENTRY_ONPROC;
}
}
static caddr_t
apix_do_softint_prolog(struct cpu *cpu, uint_t pil, uint_t oldpil,
caddr_t stackptr)
{
kthread_t *t, *volatile it;
struct machcpu *mcpu = &cpu->cpu_m;
hrtime_t now;
UNREFERENCED_1PARAMETER(oldpil);
ASSERT(pil > mcpu->mcpu_pri && pil > cpu->cpu_base_spl);
atomic_and_32((uint32_t *)&mcpu->mcpu_softinfo.st_pending, ~(1 << pil));
mcpu->mcpu_pri = pil;
now = tsc_read();
/*
* Get set to run interrupt thread.
* There should always be an interrupt thread since we
* allocate one for each level on the CPU.
*/
it = cpu->cpu_intr_thread;
ASSERT(it != NULL);
cpu->cpu_intr_thread = it->t_link;
/* t_intr_start could be zero due to cpu_intr_swtch_enter. */
t = cpu->cpu_thread;
if ((t->t_flag & T_INTR_THREAD) && t->t_intr_start != 0) {
hrtime_t intrtime = now - t->t_intr_start;
mcpu->intrstat[pil][0] += intrtime;
cpu->cpu_intracct[cpu->cpu_mstate] += intrtime;
t->t_intr_start = 0;
}
/*
* Note that the code in kcpc_overflow_intr -relies- on the
* ordering of events here - in particular that t->t_lwp of
* the interrupt thread is set to the pinned thread *before*
* curthread is changed.
*/
it->t_lwp = t->t_lwp;
it->t_state = TS_ONPROC;
/*
* Push interrupted thread onto list from new thread.
* Set the new thread as the current one.
* Set interrupted thread's T_SP because if it is the idle thread,
* resume() may use that stack between threads.
*/
ASSERT(SA((uintptr_t)stackptr) == (uintptr_t)stackptr);
t->t_sp = (uintptr_t)stackptr;
it->t_intr = t;
cpu->cpu_thread = it;
/*
* Set bit for this pil in CPU's interrupt active bitmask.
*/
ASSERT((cpu->cpu_intr_actv & (1 << pil)) == 0);
cpu->cpu_intr_actv |= (1 << pil);
/*
* Initialize thread priority level from intr_pri
*/
it->t_pil = (uchar_t)pil;
it->t_pri = (pri_t)pil + intr_pri;
it->t_intr_start = now;
return (it->t_stk);
}
static void
apix_do_softint_epilog(struct cpu *cpu, uint_t oldpil)
{
struct machcpu *mcpu = &cpu->cpu_m;
kthread_t *t, *it;
uint_t pil, basespl;
hrtime_t intrtime;
hrtime_t now = tsc_read();
it = cpu->cpu_thread;
pil = it->t_pil;
cpu->cpu_stats.sys.intr[pil - 1]++;
ASSERT(cpu->cpu_intr_actv & (1 << pil));
cpu->cpu_intr_actv &= ~(1 << pil);
intrtime = now - it->t_intr_start;
mcpu->intrstat[pil][0] += intrtime;
cpu->cpu_intracct[cpu->cpu_mstate] += intrtime;
/*
* If there is still an interrupted thread underneath this one
* then the interrupt was never blocked and the return is
* fairly simple. Otherwise it isn't.
*/
if ((t = it->t_intr) == NULL) {
/*
* Put thread back on the interrupt thread list.
* This was an interrupt thread, so set CPU's base SPL.
*/
set_base_spl();
/* mcpu->mcpu_pri = cpu->cpu_base_spl; */
it->t_state = TS_FREE;
it->t_link = cpu->cpu_intr_thread;
cpu->cpu_intr_thread = it;
(void) splhigh();
sti();
swtch();
/*NOTREACHED*/
panic("dosoftint_epilog: swtch returned");
}
it->t_link = cpu->cpu_intr_thread;
cpu->cpu_intr_thread = it;
it->t_state = TS_FREE;
cpu->cpu_thread = t;
if (t->t_flag & T_INTR_THREAD)
t->t_intr_start = now;
basespl = cpu->cpu_base_spl;
pil = MAX(oldpil, basespl);
mcpu->mcpu_pri = pil;
}
/*
* Dispatch a soft interrupt
*/
static void
apix_dispatch_softint(uint_t oldpil, uint_t arg2)
{
struct cpu *cpu = CPU;
UNREFERENCED_1PARAMETER(arg2);
sti();
av_dispatch_softvect((int)cpu->cpu_thread->t_pil);
cli();
/*
* Must run softint_epilog() on the interrupt thread stack, since
* there may not be a return from it if the interrupt thread blocked.
*/
apix_do_softint_epilog(cpu, oldpil);
}
/*
* Deliver any softints the current interrupt priority allows.
* Called with interrupts disabled.
*/
int
apix_do_softint(struct regs *regs)
{
struct cpu *cpu = CPU;
int oldipl;
int newipl;
volatile uint16_t pending;
caddr_t newsp;
while ((pending = cpu->cpu_softinfo.st_pending) != 0) {
newipl = bsrw_insn(pending);
oldipl = cpu->cpu_pri;
if (newipl <= oldipl || newipl <= cpu->cpu_base_spl)
return (-1);
newsp = apix_do_softint_prolog(cpu, newipl, oldipl,
(caddr_t)regs);
ASSERT(newsp != NULL);
switch_sp_and_call(newsp, apix_dispatch_softint, oldipl, 0);
}
return (0);
}
static int
apix_hilevel_intr_prolog(struct cpu *cpu, uint_t pil, uint_t oldpil,
struct regs *rp)
{
struct machcpu *mcpu = &cpu->cpu_m;
hrtime_t intrtime;
hrtime_t now = tsc_read();
apix_impl_t *apixp = apixs[cpu->cpu_id];
uint_t mask;
ASSERT(pil > mcpu->mcpu_pri && pil > cpu->cpu_base_spl);
if (pil == CBE_HIGH_PIL) { /* 14 */
cpu->cpu_profile_pil = oldpil;
if (USERMODE(rp->r_cs)) {
cpu->cpu_profile_pc = 0;
cpu->cpu_profile_upc = rp->r_pc;
cpu->cpu_cpcprofile_pc = 0;
cpu->cpu_cpcprofile_upc = rp->r_pc;
} else {
cpu->cpu_profile_pc = rp->r_pc;
cpu->cpu_profile_upc = 0;
cpu->cpu_cpcprofile_pc = rp->r_pc;
cpu->cpu_cpcprofile_upc = 0;
}
}
mcpu->mcpu_pri = pil;
mask = cpu->cpu_intr_actv & CPU_INTR_ACTV_HIGH_LEVEL_MASK;
if (mask != 0) {
int nestpil;
/*
* We have interrupted another high-level interrupt.
* Load starting timestamp, compute interval, update
* cumulative counter.
*/
nestpil = bsrw_insn((uint16_t)mask);
intrtime = now -
mcpu->pil_high_start[nestpil - (LOCK_LEVEL + 1)];
mcpu->intrstat[nestpil][0] += intrtime;
cpu->cpu_intracct[cpu->cpu_mstate] += intrtime;
} else {
kthread_t *t = cpu->cpu_thread;
/*
* See if we are interrupting a low-level interrupt thread.
* If so, account for its time slice only if its time stamp
* is non-zero.
*/
if ((t->t_flag & T_INTR_THREAD) != 0 && t->t_intr_start != 0) {
intrtime = now - t->t_intr_start;
mcpu->intrstat[t->t_pil][0] += intrtime;
cpu->cpu_intracct[cpu->cpu_mstate] += intrtime;
t->t_intr_start = 0;
}
}
/* store starting timestamp in CPu structure for this IPL */
mcpu->pil_high_start[pil - (LOCK_LEVEL + 1)] = now;
if (pil == 15) {
/*
* To support reentrant level 15 interrupts, we maintain a
* recursion count in the top half of cpu_intr_actv. Only
* when this count hits zero do we clear the PIL 15 bit from
* the lower half of cpu_intr_actv.
*/
uint16_t *refcntp = (uint16_t *)&cpu->cpu_intr_actv + 1;
(*refcntp)++;
}
cpu->cpu_intr_actv |= (1 << pil);
/* clear pending ipl level bit */
apixp->x_intr_pending &= ~(1 << pil);
return (mask);
}
static int
apix_hilevel_intr_epilog(struct cpu *cpu, uint_t oldpil)
{
struct machcpu *mcpu = &cpu->cpu_m;
uint_t mask, pil;
hrtime_t intrtime;
hrtime_t now = tsc_read();
pil = mcpu->mcpu_pri;
cpu->cpu_stats.sys.intr[pil - 1]++;
ASSERT(cpu->cpu_intr_actv & (1 << pil));
if (pil == 15) {
/*
* To support reentrant level 15 interrupts, we maintain a
* recursion count in the top half of cpu_intr_actv. Only
* when this count hits zero do we clear the PIL 15 bit from
* the lower half of cpu_intr_actv.
*/
uint16_t *refcntp = (uint16_t *)&cpu->cpu_intr_actv + 1;
ASSERT(*refcntp > 0);
if (--(*refcntp) == 0)
cpu->cpu_intr_actv &= ~(1 << pil);
} else {
cpu->cpu_intr_actv &= ~(1 << pil);
}
ASSERT(mcpu->pil_high_start[pil - (LOCK_LEVEL + 1)] != 0);
intrtime = now - mcpu->pil_high_start[pil - (LOCK_LEVEL + 1)];
mcpu->intrstat[pil][0] += intrtime;
cpu->cpu_intracct[cpu->cpu_mstate] += intrtime;
/*
* Check for lower-pil nested high-level interrupt beneath
* current one. If so, place a starting timestamp in its
* pil_high_start entry.
*/
mask = cpu->cpu_intr_actv & CPU_INTR_ACTV_HIGH_LEVEL_MASK;
if (mask != 0) {
int nestpil;
/*
* find PIL of nested interrupt
*/
nestpil = bsrw_insn((uint16_t)mask);
ASSERT(nestpil < pil);
mcpu->pil_high_start[nestpil - (LOCK_LEVEL + 1)] = now;
/*
* (Another high-level interrupt is active below this one,
* so there is no need to check for an interrupt
* thread. That will be done by the lowest priority
* high-level interrupt active.)
*/
} else {
/*
* Check to see if there is a low-level interrupt active.
* If so, place a starting timestamp in the thread
* structure.
*/
kthread_t *t = cpu->cpu_thread;
if (t->t_flag & T_INTR_THREAD)
t->t_intr_start = now;
}
mcpu->mcpu_pri = oldpil;
if (pil < CBE_HIGH_PIL)
(void) (*setlvlx)(oldpil, 0);
return (mask);
}
/*
* Dispatch a hilevel interrupt (one above LOCK_LEVEL)
*/
static void
apix_dispatch_pending_hilevel(uint_t ipl, uint_t arg2)
{
UNREFERENCED_1PARAMETER(arg2);
apix_dispatch_pending_autovect(ipl);
}
static __inline__ int
apix_do_pending_hilevel(struct cpu *cpu, struct regs *rp)
{
volatile uint16_t pending;
uint_t newipl, oldipl;
caddr_t newsp;
while ((pending = HILEVEL_PENDING(cpu)) != 0) {
newipl = bsrw_insn(pending);
ASSERT(newipl > LOCK_LEVEL && newipl > cpu->cpu_base_spl);
oldipl = cpu->cpu_pri;
if (newipl <= oldipl)
return (-1);
/*
* High priority interrupts run on this cpu's interrupt stack.
*/
if (apix_hilevel_intr_prolog(cpu, newipl, oldipl, rp) == 0) {
newsp = cpu->cpu_intr_stack;
switch_sp_and_call(newsp, apix_dispatch_pending_hilevel,
newipl, 0);
} else { /* already on the interrupt stack */
apix_dispatch_pending_hilevel(newipl, 0);
}
(void) apix_hilevel_intr_epilog(cpu, oldipl);
}
return (0);
}
/*
* Get an interrupt thread and swith to it. It's called from do_interrupt().
* The IF flag is cleared and thus all maskable interrupts are blocked at
* the time of calling.
*/
static caddr_t
apix_intr_thread_prolog(struct cpu *cpu, uint_t pil, caddr_t stackptr)
{
apix_impl_t *apixp = apixs[cpu->cpu_id];
struct machcpu *mcpu = &cpu->cpu_m;
hrtime_t now = tsc_read();
kthread_t *t, *volatile it;
ASSERT(pil > mcpu->mcpu_pri && pil > cpu->cpu_base_spl);
apixp->x_intr_pending &= ~(1 << pil);
ASSERT((cpu->cpu_intr_actv & (1 << pil)) == 0);
cpu->cpu_intr_actv |= (1 << pil);
mcpu->mcpu_pri = pil;
/*
* Get set to run interrupt thread.
* There should always be an interrupt thread since we
* allocate one for each level on the CPU.
*/
/* t_intr_start could be zero due to cpu_intr_swtch_enter. */
t = cpu->cpu_thread;
if ((t->t_flag & T_INTR_THREAD) && t->t_intr_start != 0) {
hrtime_t intrtime = now - t->t_intr_start;
mcpu->intrstat[pil][0] += intrtime;
cpu->cpu_intracct[cpu->cpu_mstate] += intrtime;
t->t_intr_start = 0;
}
/*
* Push interrupted thread onto list from new thread.
* Set the new thread as the current one.
* Set interrupted thread's T_SP because if it is the idle thread,
* resume() may use that stack between threads.
*/
ASSERT(SA((uintptr_t)stackptr) == (uintptr_t)stackptr);
t->t_sp = (uintptr_t)stackptr; /* mark stack in curthread for resume */
/*
* Note that the code in kcpc_overflow_intr -relies- on the
* ordering of events here - in particular that t->t_lwp of
* the interrupt thread is set to the pinned thread *before*
* curthread is changed.
*/
it = cpu->cpu_intr_thread;
cpu->cpu_intr_thread = it->t_link;
it->t_intr = t;
it->t_lwp = t->t_lwp;
/*
* (threads on the interrupt thread free list could have state
* preset to TS_ONPROC, but it helps in debugging if
* they're TS_FREE.)
*/
it->t_state = TS_ONPROC;
cpu->cpu_thread = it;
/*
* Initialize thread priority level from intr_pri
*/
it->t_pil = (uchar_t)pil;
it->t_pri = (pri_t)pil + intr_pri;
it->t_intr_start = now;
return (it->t_stk);
}
static void
apix_intr_thread_epilog(struct cpu *cpu, uint_t oldpil)
{
struct machcpu *mcpu = &cpu->cpu_m;
kthread_t *t, *it = cpu->cpu_thread;
uint_t pil, basespl;
hrtime_t intrtime;
hrtime_t now = tsc_read();
pil = it->t_pil;
cpu->cpu_stats.sys.intr[pil - 1]++;
ASSERT(cpu->cpu_intr_actv & (1 << pil));
cpu->cpu_intr_actv &= ~(1 << pil);
ASSERT(it->t_intr_start != 0);
intrtime = now - it->t_intr_start;
mcpu->intrstat[pil][0] += intrtime;
cpu->cpu_intracct[cpu->cpu_mstate] += intrtime;
/*
* If there is still an interrupted thread underneath this one
* then the interrupt was never blocked and the return is
* fairly simple. Otherwise it isn't.
*/
if ((t = it->t_intr) == NULL) {
/*
* The interrupted thread is no longer pinned underneath
* the interrupt thread. This means the interrupt must
* have blocked, and the interrupted thread has been
* unpinned, and has probably been running around the
* system for a while.
*
* Since there is no longer a thread under this one, put
* this interrupt thread back on the CPU's free list and
* resume the idle thread which will dispatch the next
* thread to run.
*/
cpu->cpu_stats.sys.intrblk++;
/*
* Put thread back on the interrupt thread list.
* This was an interrupt thread, so set CPU's base SPL.
*/
set_base_spl();
basespl = cpu->cpu_base_spl;
mcpu->mcpu_pri = basespl;
(*setlvlx)(basespl, 0);
it->t_state = TS_FREE;
/*
* Return interrupt thread to pool
*/
it->t_link = cpu->cpu_intr_thread;
cpu->cpu_intr_thread = it;
(void) splhigh();
sti();
swtch();
/*NOTREACHED*/
panic("dosoftint_epilog: swtch returned");
}
/*
* Return interrupt thread to the pool
*/
it->t_link = cpu->cpu_intr_thread;
cpu->cpu_intr_thread = it;
it->t_state = TS_FREE;
cpu->cpu_thread = t;
if (t->t_flag & T_INTR_THREAD)
t->t_intr_start = now;
basespl = cpu->cpu_base_spl;
mcpu->mcpu_pri = MAX(oldpil, basespl);
(*setlvlx)(mcpu->mcpu_pri, 0);
}
static void
apix_dispatch_pending_hardint(uint_t oldpil, uint_t arg2)
{
struct cpu *cpu = CPU;
UNREFERENCED_1PARAMETER(arg2);
apix_dispatch_pending_autovect((int)cpu->cpu_thread->t_pil);
/*
* Must run intr_thread_epilog() on the interrupt thread stack, since
* there may not be a return from it if the interrupt thread blocked.
*/
apix_intr_thread_epilog(cpu, oldpil);
}
static __inline__ int
apix_do_pending_hardint(struct cpu *cpu, struct regs *rp)
{
volatile uint16_t pending;
uint_t newipl, oldipl;
caddr_t newsp;
while ((pending = LOWLEVEL_PENDING(cpu)) != 0) {
newipl = bsrw_insn(pending);
ASSERT(newipl <= LOCK_LEVEL);
oldipl = cpu->cpu_pri;
if (newipl <= oldipl || newipl <= cpu->cpu_base_spl)
return (-1);
/*
* Run this interrupt in a separate thread.
*/
newsp = apix_intr_thread_prolog(cpu, newipl, (caddr_t)rp);
ASSERT(newsp != NULL);
switch_sp_and_call(newsp, apix_dispatch_pending_hardint,
oldipl, 0);
}
return (0);
}
/*
* Unmask level triggered interrupts
*/
static void
apix_post_hardint(int vector)
{
apix_vector_t *vecp = xv_vector(psm_get_cpu_id(), vector);
int irqno = vecp->v_inum;
ASSERT(vecp->v_type == APIX_TYPE_FIXED && apic_level_intr[irqno]);
apix_level_intr_post_dispatch(irqno);
}
static void
apix_dispatch_by_vector(uint_t vector)
{
struct cpu *cpu = CPU;
apix_vector_t *vecp = xv_vector(cpu->cpu_id, vector);
struct autovec *avp;
uint_t r, (*intr)();
caddr_t arg1, arg2;
dev_info_t *dip;
if (vecp == NULL ||
(avp = vecp->v_autovect) == NULL || avp->av_vector == NULL)
return;
avp->av_flags |= AV_PENTRY_ONPROC;
intr = avp->av_vector;
arg1 = avp->av_intarg1;
arg2 = avp->av_intarg2;
dip = avp->av_dip;
if (avp->av_prilevel != XC_HI_PIL)
sti();
DTRACE_PROBE4(interrupt__start, dev_info_t *, dip,
void *, intr, caddr_t, arg1, caddr_t, arg2);
r = (*intr)(arg1, arg2);
DTRACE_PROBE4(interrupt__complete, dev_info_t *, dip,
void *, intr, caddr_t, arg1, uint_t, r);
cli();
avp->av_flags &= ~AV_PENTRY_ONPROC;
}
static void
apix_dispatch_hilevel(uint_t vector, uint_t arg2)
{
UNREFERENCED_1PARAMETER(arg2);
apix_dispatch_by_vector(vector);
}
static void
apix_dispatch_lowlevel(uint_t vector, uint_t oldipl)
{
struct cpu *cpu = CPU;
apix_dispatch_by_vector(vector);
/*
* Must run intr_thread_epilog() on the interrupt thread stack, since
* there may not be a return from it if the interrupt thread blocked.
*/
apix_intr_thread_epilog(cpu, oldipl);
}
/*
* Interrupt service routine, called with interrupts disabled.
*/
void
apix_do_interrupt(struct regs *rp, trap_trace_rec_t *ttp)
{
struct cpu *cpu = CPU;
int vector = rp->r_trapno, newipl, oldipl = cpu->cpu_pri, ret;
apix_vector_t *vecp = NULL;
#ifdef TRAPTRACE
ttp->ttr_marker = TT_INTERRUPT;
ttp->ttr_cpuid = cpu->cpu_id;
ttp->ttr_ipl = 0xff;
ttp->ttr_pri = (uchar_t)oldipl;
ttp->ttr_spl = cpu->cpu_base_spl;
ttp->ttr_vector = 0xff;
#endif /* TRAPTRACE */
cpu_idle_exit(CPU_IDLE_CB_FLAG_INTR);
++*(uint16_t *)&cpu->cpu_m.mcpu_istamp;
/*
* If it's a softint go do it now.
*/
if (rp->r_trapno == T_SOFTINT) {
/*
* It might be the case that when an interrupt is triggered,
* the spl is raised to high by splhigh(). Later when do_splx()
* is called to restore the spl, both hardware and software
* interrupt pending flags are check and an SOFTINT is faked
* accordingly.
*/
(void) apix_do_pending_hilevel(cpu, rp);
(void) apix_do_pending_hardint(cpu, rp);
(void) apix_do_softint(rp);
ASSERT(!interrupts_enabled());
#ifdef TRAPTRACE
ttp->ttr_vector = T_SOFTINT;
#endif
return;
}
/*
* Send EOI to local APIC
*/
newipl = (*setlvl)(oldipl, (int *)&rp->r_trapno);
#ifdef TRAPTRACE
ttp->ttr_ipl = (uchar_t)newipl;
#endif /* TRAPTRACE */
/*
* Bail if it is a spurious interrupt
*/
if (newipl == -1)
return;
vector = rp->r_trapno;
vecp = xv_vector(cpu->cpu_id, vector);
#ifdef TRAPTRACE
ttp->ttr_vector = (short)vector;
#endif /* TRAPTRACE */
/*
* Direct dispatch for IPI, MSI, MSI-X
*/
if (vecp && vecp->v_type != APIX_TYPE_FIXED &&
newipl > MAX(oldipl, cpu->cpu_base_spl)) {
caddr_t newsp;
if (newipl > LOCK_LEVEL) {
if (apix_hilevel_intr_prolog(cpu, newipl, oldipl, rp)
== 0) {
newsp = cpu->cpu_intr_stack;
switch_sp_and_call(newsp, apix_dispatch_hilevel,
vector, 0);
} else {
apix_dispatch_hilevel(vector, 0);
}
(void) apix_hilevel_intr_epilog(cpu, oldipl);
} else {
newsp = apix_intr_thread_prolog(cpu, newipl,
(caddr_t)rp);
switch_sp_and_call(newsp, apix_dispatch_lowlevel,
vector, oldipl);
}
} else {
/* Add to per-pil pending queue */
apix_add_pending_hardint(vector);
if (newipl <= MAX(oldipl, cpu->cpu_base_spl) ||
!apixs[cpu->cpu_id]->x_intr_pending)
return;
}
if (apix_do_pending_hilevel(cpu, rp) < 0)
return;
do {
ret = apix_do_pending_hardint(cpu, rp);
/*
* Deliver any pending soft interrupts.
*/
(void) apix_do_softint(rp);
} while (!ret && LOWLEVEL_PENDING(cpu));
}