[src/trunk]: src/sys/arch/arm/pic Add support for intrctl(8).

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b0691dc7becf
branches:  trunk
changeset: 994505:b0691dc7becf
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sun Nov 11 10:14:14 2018 +0000

description:
Add support for intrctl(8).

diffstat:

 sys/arch/arm/pic/pic.c |  184 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 182 insertions(+), 2 deletions(-)

diffs (206 lines):

diff -r df69ea830cd0 -r b0691dc7becf sys/arch/arm/pic/pic.c
--- a/sys/arch/arm/pic/pic.c    Sun Nov 11 10:06:09 2018 +0000
+++ b/sys/arch/arm/pic/pic.c    Sun Nov 11 10:14:14 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pic.c,v 1.45 2018/10/12 21:46:32 jmcneill Exp $        */
+/*     $NetBSD: pic.c,v 1.46 2018/11/11 10:14:14 jmcneill Exp $        */
 /*-
  * Copyright (c) 2008 The NetBSD Foundation, Inc.
  * All rights reserved.
@@ -33,7 +33,7 @@
 #include "opt_multiprocessor.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pic.c,v 1.45 2018/10/12 21:46:32 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pic.c,v 1.46 2018/11/11 10:14:14 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/atomic.h>
@@ -901,7 +901,187 @@
        return NULL;
 }
 
+static struct intrsource *
+intr_get_source(const char *intrid)
+{
+       struct intrsource *is;
+       intrid_t buf;
+       size_t slot;
+       int irq;
+
+       KASSERT(mutex_owned(&cpu_lock));
+
+       for (slot = 0; slot < PIC_MAXPICS; slot++) {
+               struct pic_softc * const pic = pic_list[slot];
+               if (pic == NULL || pic->pic_irqbase < 0)
+                       continue;
+               for (irq = 0; irq < pic->pic_maxsources; irq++) {
+                       is = pic->pic_sources[irq - pic->pic_irqbase];
+                       if (is == NULL || is->is_source[0] == '\0')
+                               continue;
+
+                       snprintf(buf, sizeof(buf), "%s %s", pic->pic_name, is->is_source);
+                       if (strcmp(buf, intrid) == 0)
+                               return is;
+               }
+       }
+
+       return NULL;
+}
+
+struct intrids_handler *
+interrupt_construct_intrids(const kcpuset_t *cpuset)
+{
+       struct intrids_handler *iih;
+       struct intrsource *is;
+       int count, irq, n;
+       size_t slot;
+
+       if (kcpuset_iszero(cpuset))
+               return NULL;
+
+       count = 0;
+       for (slot = 0; slot < PIC_MAXPICS; slot++) {
+               struct pic_softc * const pic = pic_list[slot];
+               if (pic != NULL && pic->pic_irqbase >= 0) {
+                       for (irq = 0; irq < pic->pic_maxsources; irq++) {
+                               is = pic->pic_sources[irq - pic->pic_irqbase];
+                               if (is && is->is_source[0] != '\0')
+                                       count++;
+                       }
+               }
+       }
+
+       iih = kmem_zalloc(sizeof(int) + sizeof(intrid_t) * count, KM_SLEEP);
+       iih->iih_nids = count;
+
+       for (n = 0, slot = 0; n < count && slot < PIC_MAXPICS; slot++) {
+               struct pic_softc * const pic = pic_list[slot];
+               if (pic == NULL || pic->pic_irqbase < 0)
+                       continue;
+               for (irq = 0; irq < pic->pic_maxsources; irq++) {
+                       is = pic->pic_sources[irq - pic->pic_irqbase];
+                       if (is == NULL || is->is_source[0] == '\0')
+                               continue;
+
+                       snprintf(iih->iih_intrids[n++], sizeof(intrid_t), "%s %s",
+                           pic->pic_name, is->is_source);
+               }
+       }
+
+       return iih;
+}
+
+void
+interrupt_destruct_intrids(struct intrids_handler *iih)
+{
+       if (iih == NULL)
+               return;
+
+       kmem_free(iih, sizeof(int) + sizeof(intrid_t) * iih->iih_nids);
+}
+
+void
+interrupt_get_available(kcpuset_t *cpuset)
+{
+       CPU_INFO_ITERATOR cii;
+       struct cpu_info *ci;
+
+       kcpuset_zero(cpuset);
+
+       mutex_enter(&cpu_lock);
+       for (CPU_INFO_FOREACH(cii, ci)) {
+               if ((ci->ci_schedstate.spc_flags & SPCF_NOINTR) == 0)
+                       kcpuset_set(cpuset, cpu_index(ci));
+       }
+       mutex_exit(&cpu_lock);
+}
+
+void
+interrupt_get_devname(const char *intrid, char *buf, size_t len)
+{
+       buf[0] = '\0';
+}
+
+struct interrupt_get_count_arg {
+       struct intrsource *is;
+       uint64_t count;
+       u_int cpu_idx;
+};
+
+static void
+interrupt_get_count_cb(void *v0, void *v1, struct cpu_info *ci)
+{
+       struct pic_percpu * const pcpu = v0;
+       struct interrupt_get_count_arg * const arg = v1;
+
+       if (arg->cpu_idx != cpu_index(ci))
+               return;
+
+       arg->count = pcpu->pcpu_evs[arg->is->is_irq].ev_count;
+}
+
+uint64_t
+interrupt_get_count(const char *intrid, u_int cpu_idx)
+{
+       struct interrupt_get_count_arg arg;
+       struct intrsource *is;
+       uint64_t count;
+
+       count = 0;
+
+       mutex_enter(&cpu_lock);
+       is = intr_get_source(intrid);
+       if (is != NULL && is->is_pic != NULL) {
+               arg.is = is;
+               arg.count = 0;
+               arg.cpu_idx = cpu_idx;
+               percpu_foreach(is->is_pic->pic_percpu, interrupt_get_count_cb, &arg);
+               count = arg.count;
+       }
+       mutex_exit(&cpu_lock);
+
+       return count;
+}
+
 #ifdef MULTIPROCESSOR
+void
+interrupt_get_assigned(const char *intrid, kcpuset_t *cpuset)
+{
+       struct intrsource *is;
+       struct pic_softc *pic;
+
+       kcpuset_zero(cpuset);
+
+       mutex_enter(&cpu_lock);
+       is = intr_get_source(intrid);
+       if (is != NULL) {
+               pic = is->is_pic;
+               if (pic && pic->pic_ops->pic_get_affinity)
+                       pic->pic_ops->pic_get_affinity(pic, is->is_irq, cpuset);
+       }
+       mutex_exit(&cpu_lock);
+}
+
+int
+interrupt_distribute_handler(const char *intrid, const kcpuset_t *newset,
+    kcpuset_t *oldset)
+{
+       struct intrsource *is;
+       int error;
+
+       mutex_enter(&cpu_lock);
+       is = intr_get_source(intrid);
+       if (is == NULL) {
+               error = ENOENT;
+       } else {
+               error = interrupt_distribute(is, newset, oldset);
+       }
+       mutex_exit(&cpu_lock);
+
+       return error;
+}
+
 int
 interrupt_distribute(void *ih, const kcpuset_t *newset, kcpuset_t *oldset)
 {