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-rw-r--r--modules/spl/Makefile.in1
-rw-r--r--modules/spl/spl-atomic.c10
-rw-r--r--modules/splat/Makefile.in1
-rw-r--r--modules/splat/splat-atomic.c190
-rw-r--r--modules/splat/splat-ctl.c2
-rw-r--r--modules/splat/splat-internal.h4
6 files changed, 208 insertions, 0 deletions
diff --git a/modules/spl/Makefile.in b/modules/spl/Makefile.in
index bcc25be97..7f16904ef 100644
--- a/modules/spl/Makefile.in
+++ b/modules/spl/Makefile.in
@@ -19,6 +19,7 @@ spl-objs += spl-time.o
spl-objs += spl-kobj.o
spl-objs += spl-module.o
spl-objs += spl-generic.o
+spl-objs += spl-atomic.o
splmodule := spl.ko
splmoduledir := @kmoduledir@/kernel/lib/
diff --git a/modules/spl/spl-atomic.c b/modules/spl/spl-atomic.c
new file mode 100644
index 000000000..fb161c520
--- /dev/null
+++ b/modules/spl/spl-atomic.c
@@ -0,0 +1,10 @@
+#include <sys/atomic.h>
+
+/* Global atomic lock declarations */
+spinlock_t atomic64_lock = SPIN_LOCK_UNLOCKED;
+spinlock_t atomic32_lock = SPIN_LOCK_UNLOCKED;
+spinlock_t atomic_lock = SPIN_LOCK_UNLOCKED;
+
+EXPORT_SYMBOL(atomic64_lock);
+EXPORT_SYMBOL(atomic32_lock);
+EXPORT_SYMBOL(atomic_lock);
diff --git a/modules/splat/Makefile.in b/modules/splat/Makefile.in
index 69f38b1f5..8c814d3e2 100644
--- a/modules/splat/Makefile.in
+++ b/modules/splat/Makefile.in
@@ -23,6 +23,7 @@ splat-objs += splat-rwlock.o
splat-objs += splat-time.o
splat-objs += splat-vnode.o
splat-objs += splat-kobj.o
+splat-objs += splat-atomic.o
splatmodule := splat.ko
splatmoduledir := @kmoduledir@/kernel/lib/
diff --git a/modules/splat/splat-atomic.c b/modules/splat/splat-atomic.c
new file mode 100644
index 000000000..c170cc05e
--- /dev/null
+++ b/modules/splat/splat-atomic.c
@@ -0,0 +1,190 @@
+#include "splat-internal.h"
+
+#define SPLAT_SUBSYSTEM_ATOMIC 0x0b00
+#define SPLAT_ATOMIC_NAME "atomic"
+#define SPLAT_ATOMIC_DESC "Kernel Atomic Tests"
+
+#define SPLAT_ATOMIC_TEST1_ID 0x0b01
+#define SPLAT_ATOMIC_TEST1_NAME "64-bit"
+#define SPLAT_ATOMIC_TEST1_DESC "Validate 64-bit atomic ops"
+
+#define SPLAT_ATOMIC_TEST_MAGIC 0x43435454UL
+#define SPLAT_ATOMIC_INIT_VALUE 10000000UL
+
+typedef enum {
+ SPLAT_ATOMIC_INC_64 = 0,
+ SPLAT_ATOMIC_DEC_64 = 1,
+ SPLAT_ATOMIC_ADD_64 = 2,
+ SPLAT_ATOMIC_SUB_64 = 3,
+ SPLAT_ATOMIC_ADD_64_NV = 4,
+ SPLAT_ATOMIC_SUB_64_NV = 5,
+ SPLAT_ATOMIC_COUNT_64 = 6
+} atomic_op_t;
+
+typedef struct atomic_priv {
+ unsigned long ap_magic;
+ struct file *ap_file;
+ spinlock_t ap_lock;
+ wait_queue_head_t ap_waitq;
+ volatile uint64_t ap_atomic;
+ volatile uint64_t ap_atomic_exited;
+ atomic_op_t ap_op;
+
+} atomic_priv_t;
+
+static void
+splat_atomic_work(void *priv)
+{
+ atomic_priv_t *ap;
+ atomic_op_t op;
+ int i;
+
+ ap = (atomic_priv_t *)priv;
+ ASSERT(ap->ap_magic == SPLAT_ATOMIC_TEST_MAGIC);
+
+ spin_lock(&ap->ap_lock);
+ op = ap->ap_op;
+ wake_up(&ap->ap_waitq);
+ spin_unlock(&ap->ap_lock);
+
+ splat_vprint(ap->ap_file, SPLAT_ATOMIC_TEST1_NAME,
+ "Thread %d successfully started: %lu/%lu\n", op,
+ (long unsigned)ap->ap_atomic,
+ (long unsigned)ap->ap_atomic_exited);
+
+ for (i = 0; i < SPLAT_ATOMIC_INIT_VALUE / 10; i++) {
+
+ /* Periodically sleep to mix up the ordering */
+ if ((i % (SPLAT_ATOMIC_INIT_VALUE / 100)) == 0) {
+ splat_vprint(ap->ap_file, SPLAT_ATOMIC_TEST1_NAME,
+ "Thread %d sleeping: %lu/%lu\n", op,
+ (long unsigned)ap->ap_atomic,
+ (long unsigned)ap->ap_atomic_exited);
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(HZ / 100);
+ }
+
+ switch (op) {
+ case SPLAT_ATOMIC_INC_64:
+ atomic_inc_64(&ap->ap_atomic);
+ break;
+ case SPLAT_ATOMIC_DEC_64:
+ atomic_dec_64(&ap->ap_atomic);
+ break;
+ case SPLAT_ATOMIC_ADD_64:
+ atomic_add_64(&ap->ap_atomic, 3);
+ break;
+ case SPLAT_ATOMIC_SUB_64:
+ atomic_sub_64(&ap->ap_atomic, 3);
+ break;
+ case SPLAT_ATOMIC_ADD_64_NV:
+ atomic_add_64_nv(&ap->ap_atomic, 5);
+ break;
+ case SPLAT_ATOMIC_SUB_64_NV:
+ atomic_sub_64_nv(&ap->ap_atomic, 5);
+ break;
+ default:
+ BUG_ON(1);
+ }
+ }
+
+ atomic_inc_64(&ap->ap_atomic_exited);
+
+ splat_vprint(ap->ap_file, SPLAT_ATOMIC_TEST1_NAME,
+ "Thread %d successfully exited: %lu/%lu\n", op,
+ (long unsigned)ap->ap_atomic,
+ (long unsigned)ap->ap_atomic_exited);
+
+ thread_exit();
+ wake_up(&ap->ap_waitq);
+}
+
+static int
+splat_atomic_test1_cond(atomic_priv_t *ap)
+{
+ return (ap->ap_atomic_exited == SPLAT_ATOMIC_COUNT_64);
+}
+
+static int
+splat_atomic_test1(struct file *file, void *arg)
+{
+ atomic_priv_t ap;
+ DEFINE_WAIT(wait);
+ kthread_t *thr;
+ int i;
+
+ ap.ap_magic = SPLAT_ATOMIC_TEST_MAGIC;
+ ap.ap_file = file;
+ spin_lock_init(&ap.ap_lock);
+ init_waitqueue_head(&ap.ap_waitq);
+ ap.ap_atomic = SPLAT_ATOMIC_INIT_VALUE;
+ ap.ap_atomic_exited = 0;
+
+ for (i = 0; i < SPLAT_ATOMIC_COUNT_64; i++) {
+ spin_lock(&ap.ap_lock);
+ ap.ap_op = i;
+
+ thr = (kthread_t *)thread_create(NULL, 0, splat_atomic_work,
+ &ap, 0, &p0, TS_RUN,
+ minclsyspri);
+ BUG_ON(thr == NULL);
+
+ /* Prepare to wait, the new thread will wake us once it
+ * has made a copy of the unique private passed data */
+ prepare_to_wait(&ap.ap_waitq, &wait, TASK_UNINTERRUPTIBLE);
+ spin_unlock(&ap.ap_lock);
+ schedule();
+ }
+
+ wait_event_interruptible(ap.ap_waitq, splat_atomic_test1_cond(&ap));
+
+ if (ap.ap_atomic != SPLAT_ATOMIC_INIT_VALUE) {
+ splat_vprint(file, SPLAT_ATOMIC_TEST1_NAME,
+ "Final value %lu does not match initial value %lu\n",
+ (long unsigned)ap.ap_atomic, SPLAT_ATOMIC_INIT_VALUE);
+ return -EINVAL;
+ }
+
+ splat_vprint(file, SPLAT_ATOMIC_TEST1_NAME,
+ "Success initial and final values match, %lu == %lu\n",
+ (long unsigned)ap.ap_atomic, SPLAT_ATOMIC_INIT_VALUE);
+
+ return 0;
+}
+
+splat_subsystem_t *
+splat_atomic_init(void)
+{
+ splat_subsystem_t *sub;
+
+ sub = kmalloc(sizeof(*sub), GFP_KERNEL);
+ if (sub == NULL)
+ return NULL;
+
+ memset(sub, 0, sizeof(*sub));
+ strncpy(sub->desc.name, SPLAT_ATOMIC_NAME, SPLAT_NAME_SIZE);
+ strncpy(sub->desc.desc, SPLAT_ATOMIC_DESC, SPLAT_DESC_SIZE);
+ INIT_LIST_HEAD(&sub->subsystem_list);
+ INIT_LIST_HEAD(&sub->test_list);
+ spin_lock_init(&sub->test_lock);
+ sub->desc.id = SPLAT_SUBSYSTEM_ATOMIC;
+
+ SPLAT_TEST_INIT(sub, SPLAT_ATOMIC_TEST1_NAME, SPLAT_ATOMIC_TEST1_DESC,
+ SPLAT_ATOMIC_TEST1_ID, splat_atomic_test1);
+
+ return sub;
+}
+
+void
+splat_atomic_fini(splat_subsystem_t *sub)
+{
+ ASSERT(sub);
+ SPLAT_TEST_FINI(sub, SPLAT_ATOMIC_TEST1_ID);
+
+ kfree(sub);
+}
+
+int
+splat_atomic_id(void) {
+ return SPLAT_SUBSYSTEM_ATOMIC;
+}
diff --git a/modules/splat/splat-ctl.c b/modules/splat/splat-ctl.c
index e9026cd8d..d8245737a 100644
--- a/modules/splat/splat-ctl.c
+++ b/modules/splat/splat-ctl.c
@@ -593,6 +593,7 @@ splat_init(void)
SPLAT_SUBSYSTEM_INIT(time);
SPLAT_SUBSYSTEM_INIT(vnode);
SPLAT_SUBSYSTEM_INIT(kobj);
+ SPLAT_SUBSYSTEM_INIT(atomic);
dev = MKDEV(SPLAT_MAJOR, 0);
if ((rc = register_chrdev_region(dev, SPLAT_MINORS, "splatctl")))
@@ -654,6 +655,7 @@ splat_fini(void)
cdev_del(&splat_cdev);
unregister_chrdev_region(dev, SPLAT_MINORS);
+ SPLAT_SUBSYSTEM_FINI(atomic);
SPLAT_SUBSYSTEM_FINI(kobj);
SPLAT_SUBSYSTEM_FINI(vnode);
SPLAT_SUBSYSTEM_FINI(time);
diff --git a/modules/splat/splat-internal.h b/modules/splat/splat-internal.h
index aca4b3d38..61d0fd286 100644
--- a/modules/splat/splat-internal.h
+++ b/modules/splat/splat-internal.h
@@ -33,6 +33,7 @@
#include <sys/timer.h>
#include <sys/types.h>
#include <sys/kobj.h>
+#include <sys/atomic.h>
#include "splat-ctl.h"
@@ -172,6 +173,7 @@ splat_subsystem_t * splat_thread_init(void);
splat_subsystem_t * splat_time_init(void);
splat_subsystem_t * splat_vnode_init(void);
splat_subsystem_t * splat_kobj_init(void);
+splat_subsystem_t * splat_atomic_init(void);
void splat_condvar_fini(splat_subsystem_t *);
void splat_kmem_fini(splat_subsystem_t *);
@@ -183,6 +185,7 @@ void splat_thread_fini(splat_subsystem_t *);
void splat_time_fini(splat_subsystem_t *);
void splat_vnode_fini(splat_subsystem_t *);
void splat_kobj_fini(splat_subsystem_t *);
+void splat_atomic_fini(splat_subsystem_t *);
int splat_condvar_id(void);
int splat_kmem_id(void);
@@ -194,5 +197,6 @@ int splat_thread_id(void);
int splat_time_id(void);
int splat_vnode_id(void);
int splat_kobj_id(void);
+int splat_atomic_id(void);
#endif /* _SPLAT_INTERNAL_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 00:54:29 +0000