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Differential D36610 Diff 117518 sys/powerpc/powerpc/intr_machdep.c

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sys/powerpc/powerpc/intr_machdep.c

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SYSINIT(intr_init, SI_SUB_INTR, SI_ORDER_FIRST, intr_init, NULL); SYSINIT(intr_init, SI_SUB_INTR, SI_ORDER_FIRST, intr_init, NULL);
static void static void
intr_init_sources(void *arg __unused) intr_init_sources(void *arg __unused)
{ {
powerpc_intrs = mallocarray(num_io_irqs, sizeof(*powerpc_intrs), powerpc_intrs = mallocarray(num_io_irqs, sizeof(*powerpc_intrs),
M_INTR, M_WAITOK | M_ZERO); M_INTR, M_WAITOK | M_ZERO);
nintrcnt = 1 + num_io_irqs * 2 + mp_ncpus * 2; nintrcnt = 1 + num_io_irqs * 2 + mp_ncpus * 2;
ehem_freebsd_m5p.comAuthorUnsubmitted
Done
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I'm rather suspicious about this computation for the table size. I'm unfamiliar with how the interrupt counters work on PowerPC, but based on how INTRNG behaves this is way too few.

ehem_freebsd_m5p.com: I'm rather suspicious about this computation for the table size. I'm unfamiliar with how the…
#ifdef COUNT_IPIS #ifdef COUNT_IPIS
if (mp_ncpus > 1) if (mp_ncpus > 1)
nintrcnt += 8 * mp_ncpus; nintrcnt += 8 * mp_ncpus;
#endif #endif
intrcnt = mallocarray(nintrcnt, sizeof(u_long), M_INTR, M_WAITOK | intrcnt = mallocarray(nintrcnt, sizeof(u_long), M_INTR, M_WAITOK |
M_ZERO); M_ZERO);
intrnames = mallocarray(nintrcnt, INTRNAME_LEN, M_INTR, M_WAITOK | intrnames = mallocarray(nintrcnt, INTRNAME_LEN, M_INTR, M_WAITOK |
M_ZERO); M_ZERO);
ehem_freebsd_m5p.comAuthorUnsubmitted
Done
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intrnames = mallocarray(); clearly this is interpreting "intrnames" as an array of fixed-length strings. This matches with intrcnt_setname() using intrnames + (MAXCOMLEN + 1) * index, just above.

ehem_freebsd_m5p.com: `intrnames = mallocarray();` clearly this is interpreting "intrnames" as an array of fixed…
intrcnt_setname("???", 0); intrcnt_setname("???", 0);
intrcnt_index = 1; intrcnt_index = 1;
ehem_freebsd_m5p.comAuthorUnsubmitted
Done
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This was clearly copied from x86. I've got no idea what purpose this questionable interrupt served and when. Since there is no documentation, I suspect it is unused now.

ehem_freebsd_m5p.com: This was clearly copied from x86. I've got no idea what purpose this questionable interrupt…
} }
/* /*
* This needs to happen before SI_SUB_CPU * This needs to happen before SI_SUB_CPU
*/ */
SYSINIT(intr_init_sources, SI_SUB_KLD, SI_ORDER_ANY, intr_init_sources, NULL); SYSINIT(intr_init_sources, SI_SUB_KLD, SI_ORDER_ANY, intr_init_sources, NULL);
#ifdef SMP #ifdef SMP
static void static void
▲ Show 20 Lines • Show All 70 Lines • ▼ Show 20 Lines if (iscan != NULL && iscan->irq == irq)
break; break;
if (iscan == NULL && i->vector == -1) if (iscan == NULL && i->vector == -1)
i->vector = vector; i->vector = vector;
iscan = NULL; iscan = NULL;
} }
if (iscan == NULL && i->vector != -1) { if (iscan == NULL && i->vector != -1) {
powerpc_intrs[i->vector] = i; powerpc_intrs[i->vector] = i;
i->cntindex = atomic_fetchadd_int(&intrcnt_index, 1); i->cntindex = nintrcnt - 1;
i->cntp = &intrcnt[i->cntindex]; i->cntp = &intrcnt[i->cntindex];
sprintf(intrname, "irq%u:", i->irq); sprintf(intrname, "irq%u:", i->irq);
intrcnt_setname(intrname, i->cntindex); intrcnt_setname(intrname, i->cntindex);
nvectors++; nvectors++;
} }
mtx_unlock(&intr_table_lock); mtx_unlock(&intr_table_lock);
if (iscan != NULL || i->vector == -1) { if (iscan != NULL || i->vector == -1) {
▲ Show 20 Lines • Show All 412 Lines • ▼ Show 20 Lines
} }
/* /*
* Sysctls used by systat and others: hw.intrnames and hw.intrcnt. * Sysctls used by systat and others: hw.intrnames and hw.intrcnt.
*/ */
static int static int
sysctl_intrnames(SYSCTL_HANDLER_ARGS) sysctl_intrnames(SYSCTL_HANDLER_ARGS)
{ {
return (sysctl_handle_opaque(oidp, intrnames, int error;
intrcnt_index * INTRNAME_LEN, req));
error = sysctl_handle_opaque(oidp, intrnames,
intrcnt_index * INTRNAME_LEN, req);
if (error != 0)
return (error);
return (intr_event_sysctl_intrnames(oidp, arg1, arg2, req));
} }
SYSCTL_PROC(_hw, OID_AUTO, intrnames, SYSCTL_PROC(_hw, OID_AUTO, intrnames,
CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
sysctl_intrnames, sysctl_intrnames,
"", "Interrupt Names"); "", "Interrupt Names");
static int static int
sysctl_intrcnt(SYSCTL_HANDLER_ARGS) sysctl_intrcnt(SYSCTL_HANDLER_ARGS)
{ {
int error;
#ifdef SCTL_MASK32 #ifdef SCTL_MASK32
uint32_t *intrcnt32; uint32_t *intrcnt32;
unsigned i; unsigned i;
int error;
if (req->flags & SCTL_MASK32) { if (req->flags & SCTL_MASK32) {
if (!req->oldptr) if (!req->oldptr)
return (sysctl_handle_opaque(oidp, NULL, return (sysctl_handle_opaque(oidp, NULL,
intrcnt_index * sizeof(uint32_t), req)); intrcnt_index * sizeof(uint32_t), req));
intrcnt32 = malloc(intrcnt_index * sizeof(uint32_t), M_TEMP, intrcnt32 = malloc(intrcnt_index * sizeof(uint32_t), M_TEMP,
M_NOWAIT); M_NOWAIT);
if (intrcnt32 == NULL) if (intrcnt32 == NULL)
return (ENOMEM); return (ENOMEM);
for (i = 0; i < intrcnt_index; i++) for (i = 0; i < intrcnt_index; i++)
intrcnt32[i] = intrcnt[i]; intrcnt32[i] = intrcnt[i];
error = sysctl_handle_opaque(oidp, intrcnt32, error = sysctl_handle_opaque(oidp, intrcnt32,
intrcnt_index * sizeof(uint32_t), req); intrcnt_index * sizeof(uint32_t), req);
free(intrcnt32, M_TEMP); free(intrcnt32, M_TEMP);
return (error); } else
}
#endif #endif
return (sysctl_handle_opaque(oidp, intrcnt, error = sysctl_handle_opaque(oidp, intrcnt,
intrcnt_index * sizeof(u_long), req)); intrcnt_index * sizeof(u_long), req);
return (error == 0 ? intr_event_sysctl_intrcnt(oidp, arg1, arg2, req) :
error);
} }
SYSCTL_PROC(_hw, OID_AUTO, intrcnt, SYSCTL_PROC(_hw, OID_AUTO, intrcnt,
CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
sysctl_intrcnt, sysctl_intrcnt,
"", "Interrupt Counts"); "", "Interrupt Counts");
#ifdef DDB #ifdef DDB
/* /*
* DDB command to dump the interrupt statistics. * DDB command to dump the IPI interrupt statistics.
*/ */
DB_SHOW_COMMAND_FLAGS(intrcnt, db_show_intrcnt, DB_CMD_MEMSAFE) DB_SHOW_COMMAND_FLAGS(ipicnt, db_show_ipicnt, DB_CMD_MEMSAFE)
{ {
u_int i; u_int i;
for (i = 0; i < intrcnt_index && !db_pager_quit; ++i) for (i = 0; i < intrcnt_index && !db_pager_quit; ++i)
if (intrcnt[i] != 0) if (intrcnt[i] != 0)
db_printf("%s\t%lu\n", intrnames + i * INTRNAME_LEN, db_printf("%s\t%lu\n", intrnames + i * INTRNAME_LEN,
intrcnt[i]); intrcnt[i]);
} }
#endif #endif