/**
* adreno_drawctxt_wait() - sleep until a timestamp expires
* @adreno_dev: pointer to the adreno_device struct
* @drawctxt: Pointer to the draw context to sleep for
* @timetamp: Timestamp to wait on
* @timeout: Number of jiffies to wait (0 for infinite)
*
* Register an event to wait for a timestamp on a context and sleep until it
* has past. Returns < 0 on error, -ETIMEDOUT if the timeout expires or 0
* on success
*/
int adreno_drawctxt_wait(struct adreno_device *adreno_dev,
struct kgsl_context *context,
uint32_t timestamp, unsigned int timeout)
{
static unsigned int io_cnt;
struct kgsl_device *device = &adreno_dev->dev;
struct kgsl_pwrctrl *pwr = &device->pwrctrl;
struct adreno_context *drawctxt = ADRENO_CONTEXT(context);
int ret, io;
if (kgsl_context_detached(context))
return -EINVAL;
if (drawctxt->state == ADRENO_CONTEXT_STATE_INVALID)
return -EDEADLK;
/* Needs to hold the device mutex */
BUG_ON(!mutex_is_locked(&device->mutex));
trace_adreno_drawctxt_wait_start(context->id, timestamp);
ret = kgsl_add_event(device, &context->events, timestamp,
wait_callback, (void *) drawctxt);
if (ret)
goto done;
/*
* For proper power accounting sometimes we need to call
* io_wait_interruptible_timeout and sometimes we need to call
* plain old wait_interruptible_timeout. We call the regular
* timeout N times out of 100, where N is a number specified by
* the current power level
*/
io_cnt = (io_cnt + 1) % 100;
io = (io_cnt < pwr->pwrlevels[pwr->active_pwrlevel].io_fraction)
? 0 : 1;
kgsl_mutex_unlock(&device->mutex, &device->mutex_owner);
if (timeout) {
long ret_temp;
ret_temp = adreno_wait_event_interruptible_timeout(
drawctxt->waiting,
_check_context_timestamp(device, drawctxt, timestamp),
msecs_to_jiffies(timeout), io);
if (ret_temp == 0)
ret = -ETIMEDOUT;
else if (ret_temp > 0)
ret = 0;
else
ret = (int) ret_temp;
} else {
ret = (int) adreno_wait_event_interruptible(drawctxt->waiting,
_check_context_timestamp(device, drawctxt, timestamp),
io);
}
kgsl_mutex_lock(&device->mutex, &device->mutex_owner);
/* -EDEADLK if the context was invalidated while we were waiting */
if (drawctxt->state == ADRENO_CONTEXT_STATE_INVALID)
ret = -EDEADLK;
/* Return -EINVAL if the context was detached while we were waiting */
if (kgsl_context_detached(context))
ret = -EINVAL;
done:
trace_adreno_drawctxt_wait_done(context->id, timestamp, ret);
return ret;
}
int adreno_drawctxt_wait(struct adreno_device *adreno_dev,
struct kgsl_context *context,
uint32_t timestamp, unsigned int timeout)
{
static unsigned int io_cnt;
struct kgsl_device *device = &adreno_dev->dev;
struct kgsl_pwrctrl *pwr = &device->pwrctrl;
struct adreno_context *drawctxt = ADRENO_CONTEXT(context);
int ret, io;
if (kgsl_context_detached(context))
return -EINVAL;
if (drawctxt->state == ADRENO_CONTEXT_STATE_INVALID)
return -EDEADLK;
BUG_ON(!mutex_is_locked(&device->mutex));
trace_adreno_drawctxt_wait_start(context->id, timestamp);
ret = kgsl_add_event(device, context->id, timestamp,
wait_callback, drawctxt, NULL);
if (ret)
goto done;
io_cnt = (io_cnt + 1) % 100;
io = (io_cnt < pwr->pwrlevels[pwr->active_pwrlevel].io_fraction)
? 0 : 1;
mutex_unlock(&device->mutex);
if (timeout) {
ret = (int) adreno_wait_event_interruptible_timeout(
drawctxt->waiting,
_check_context_timestamp(device, drawctxt, timestamp),
msecs_to_jiffies(timeout), io);
if (ret == 0)
ret = -ETIMEDOUT;
else if (ret > 0)
ret = 0;
} else {
ret = (int) adreno_wait_event_interruptible(drawctxt->waiting,
_check_context_timestamp(device, drawctxt, timestamp),
io);
}
mutex_lock(&device->mutex);
if (drawctxt->state == ADRENO_CONTEXT_STATE_INVALID)
ret = -EDEADLK;
if (kgsl_context_detached(context))
ret = -EINVAL;
done:
trace_adreno_drawctxt_wait_done(context->id, timestamp, ret);
return ret;
}