static void show_syncpts(struct nvhost_master *m, struct output *o)
{
int i;
BUG_ON(!nvhost_get_chip_ops()->syncpt.name);
nvhost_debug_output(o, "---- syncpts ----\n");
for (i = 0; i < nvhost_syncpt_nb_pts(&m->syncpt); i++) {
u32 max = nvhost_syncpt_read_max(&m->syncpt, i);
u32 min = nvhost_syncpt_update_min(&m->syncpt, i);
if (!min && !max)
continue;
nvhost_debug_output(o, "id %d (%s) min %d max %d\n",
i, nvhost_get_chip_ops()->syncpt.name(&m->syncpt, i),
min, max);
}
for (i = 0; i < nvhost_syncpt_nb_pts(&m->syncpt); i++) {
u32 base_val;
base_val = nvhost_syncpt_read_wait_base(&m->syncpt, i);
if (base_val)
nvhost_debug_output(o, "waitbase id %d val %d\n",
i, base_val);
}
nvhost_debug_output(o, "\n");
}
static int nvhost_ioctl_ctrl_syncpt_read_max(struct nvhost_ctrl_userctx *ctx,
struct nvhost_ctrl_syncpt_read_args *args)
{
if (args->id >= nvhost_syncpt_nb_pts(&ctx->dev->syncpt))
return -EINVAL;
args->value = nvhost_syncpt_read_max(&ctx->dev->syncpt, args->id);
return 0;
}
static ssize_t syncpt_max_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct nvhost_syncpt_attr *syncpt_attr =
container_of(attr, struct nvhost_syncpt_attr, attr);
return snprintf(buf, PAGE_SIZE, "%d",
nvhost_syncpt_read_max(&syncpt_attr->host->syncpt,
syncpt_attr->id));
}
void nvhost_syncpt_debug(struct nvhost_syncpt *sp)
{
u32 i;
for (i = 0; i < NV_HOST1X_SYNCPT_NB_PTS; i++) {
u32 max = nvhost_syncpt_read_max(sp, i);
if (!max)
continue;
dev_info(&syncpt_to_dev(sp)->pdev->dev,
"id %d (%s) min %d max %d\n",
i, nvhost_syncpt_name(i),
nvhost_syncpt_update_min(sp, i), max);
}
}
/**
* Updates the last value read from hardware.
* (was nvhost_syncpt_update_min)
*/
static u32 t20_syncpt_update_min(struct nvhost_syncpt *sp, u32 id)
{
struct nvhost_master *dev = syncpt_to_dev(sp);
void __iomem *sync_regs = dev->sync_aperture;
u32 old, live;
do {
old = nvhost_syncpt_read_min(sp, id);
live = readl(sync_regs + (HOST1X_SYNC_SYNCPT_0 + id * 4));
} while ((u32)atomic_cmpxchg(&sp->min_val[id], old, live) != old);
if (!nvhost_syncpt_check_max(sp, id, live))
dev_err(&syncpt_to_dev(sp)->dev->dev,
"%s failed: id=%u, min=%d, max=%d\n",
__func__,
nvhost_syncpt_read_min(sp, id),
nvhost_syncpt_read_max(sp, id),
id);
return live;
}
/**
* Main entrypoint for syncpoint value waits.
*/
int nvhost_syncpt_wait_timeout(struct nvhost_syncpt *sp, u32 id,
u32 thresh, u32 timeout, u32 *value)
{
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
void *ref;
void *waiter;
int err = 0, check_count = 0, low_timeout = 0;
static int print_once = 0;
if (value)
*value = 0;
BUG_ON(!syncpt_op(sp).update_min);
if (!nvhost_syncpt_check_max(sp, id, thresh)) {
dev_warn(&syncpt_to_dev(sp)->pdev->dev,
"wait %d (%s) for (%d) wouldn't be met (max %d)\n",
id, syncpt_op(sp).name(sp, id), thresh,
nvhost_syncpt_read_max(sp, id));
nvhost_debug_dump(syncpt_to_dev(sp));
return -EINVAL;
}
/* first check cache */
if (nvhost_syncpt_min_cmp(sp, id, thresh)) {
if (value)
*value = nvhost_syncpt_read_min(sp, id);
return 0;
}
/* keep host alive */
nvhost_module_busy(syncpt_to_dev(sp)->dev);
if (client_managed(id) || !nvhost_syncpt_min_eq_max(sp, id)) {
/* try to read from register */
u32 val = syncpt_op(sp).update_min(sp, id);
if ((s32)(val - thresh) >= 0) {
if (value)
*value = val;
goto done;
}
}
if (!timeout) {
err = -EAGAIN;
goto done;
}
/* schedule a wakeup when the syncpoint value is reached */
waiter = nvhost_intr_alloc_waiter();
if (!waiter) {
err = -ENOMEM;
goto done;
}
err = nvhost_intr_add_action(&(syncpt_to_dev(sp)->intr), id, thresh,
NVHOST_INTR_ACTION_WAKEUP_INTERRUPTIBLE, &wq,
waiter,
&ref);
if (err)
goto done;
err = -EAGAIN;
/* wait for the syncpoint, or timeout, or signal */
while (timeout) {
u32 check = min_t(u32, SYNCPT_CHECK_PERIOD, timeout);
int remain = wait_event_interruptible_timeout(wq,
nvhost_syncpt_min_cmp(sp, id, thresh),
check);
if (remain > 0 || nvhost_syncpt_min_cmp(sp, id, thresh)) {
if (value)
*value = nvhost_syncpt_read_min(sp, id);
err = 0;
break;
}
if (remain < 0) {
err = remain;
break;
}
if (timeout != NVHOST_NO_TIMEOUT) {
if (timeout < SYNCPT_CHECK_PERIOD) {
/* Caller-specified timeout may be impractically low */
low_timeout = timeout;
}
timeout -= check;
}
if (timeout) {
dev_warn(&syncpt_to_dev(sp)->pdev->dev,
"%s: syncpoint id %d (%s) stuck waiting %d, timeout=%d\n",
current->comm, id, syncpt_op(sp).name(sp, id),
thresh, timeout);
syncpt_op(sp).debug(sp);
print_once++;
if (print_once == 1)
{
nvhost_debug_dump(syncpt_to_dev(sp));
debug_stuck_syncpoint();
}
if (check_count > MAX_STUCK_CHECK_COUNT) {
if (low_timeout) {
dev_warn(&syncpt_to_dev(sp)->pdev->dev,
"is timeout %d too low?\n",
low_timeout);
}
nvhost_debug_dump(syncpt_to_dev(sp));
BUG();
}
check_count++;
}
}
nvhost_intr_put_ref(&(syncpt_to_dev(sp)->intr), ref);
done:
nvhost_module_idle(syncpt_to_dev(sp)->dev);
return err;
}
