/**
* 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)
{
struct kgsl_device *device = &adreno_dev->dev;
struct adreno_context *drawctxt = ADRENO_CONTEXT(context);
int ret;
long ret_temp;
if (kgsl_context_detached(context))
return -EINVAL;
if (kgsl_context_invalid(context))
return -EDEADLK;
/* Needs to hold the device mutex */
BUG_ON(!mutex_is_locked(&device->mutex));
trace_adreno_drawctxt_wait_start(-1, context->id, timestamp);
ret = kgsl_add_event(device, &context->events, timestamp,
wait_callback, (void *) drawctxt);
if (ret)
goto done;
mutex_unlock(&device->mutex);
if (timeout) {
ret_temp = wait_event_interruptible_timeout(
drawctxt->waiting,
_check_context_timestamp(device, drawctxt, timestamp),
msecs_to_jiffies(timeout));
if (ret_temp == 0)
ret = -ETIMEDOUT;
else if (ret_temp > 0)
ret = 0;
else
ret = (int) ret_temp;
} else {
ret = wait_event_interruptible(drawctxt->waiting,
_check_context_timestamp(device, drawctxt, timestamp));
}
mutex_lock(&device->mutex);
/* -EDEADLK if the context was invalidated while we were waiting */
if (kgsl_context_invalid(context))
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(-1, context->id, timestamp, ret);
return ret;
}
/**
* 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)
{
struct kgsl_device *device = &adreno_dev->dev;
struct adreno_context *drawctxt = ADRENO_CONTEXT(context);
int ret;
long ret_temp;
if (kgsl_context_detached(context))
return -ENOENT;
if (kgsl_context_invalid(context))
return -EDEADLK;
trace_adreno_drawctxt_wait_start(-1, context->id, timestamp);
ret = kgsl_add_event(device, &context->events, timestamp,
wait_callback, (void *) drawctxt);
if (ret)
goto done;
/*
* If timeout is 0, wait forever. msecs_to_jiffies will force
* values larger than INT_MAX to an infinite timeout.
*/
if (timeout == 0)
timeout = UINT_MAX;
ret_temp = wait_event_interruptible_timeout(drawctxt->waiting,
_check_context_timestamp(device, context, timestamp),
msecs_to_jiffies(timeout));
if (ret_temp == 0) {
ret = -ETIMEDOUT;
goto done;
} else if (ret_temp < 0) {
ret = (int) ret_temp;
goto done;
}
ret = 0;
/* -EDEADLK if the context was invalidated while we were waiting */
if (kgsl_context_invalid(context))
ret = -EDEADLK;
/* Return -EINVAL if the context was detached while we were waiting */
if (kgsl_context_detached(context))
ret = -ENOENT;
done:
trace_adreno_drawctxt_wait_done(-1, context->id, timestamp, ret);
return ret;
}
/**
* adreno_drawctxt_wait_rb() - Wait for the last RB timestamp at which this
* context submitted a command to the corresponding RB
* @adreno_dev: The device on which the timestamp is active
* @context: The context which subbmitted command to RB
* @timestamp: The RB timestamp of last command submitted to RB by context
* @timeout: Timeout value for the wait
*/
static int adreno_drawctxt_wait_rb(struct adreno_device *adreno_dev,
struct kgsl_context *context,
uint32_t timestamp, unsigned int timeout)
{
struct kgsl_device *device = &adreno_dev->dev;
struct adreno_context *drawctxt = ADRENO_CONTEXT(context);
int ret = 0;
/* Needs to hold the device mutex */
BUG_ON(!mutex_is_locked(&device->mutex));
/*
* If the context is invalid then return immediately - we may end up
* waiting for a timestamp that will never come
*/
if (kgsl_context_invalid(context))
goto done;
trace_adreno_drawctxt_wait_start(drawctxt->rb->id, context->id,
timestamp);
ret = adreno_ringbuffer_waittimestamp(drawctxt->rb, timestamp, timeout);
done:
trace_adreno_drawctxt_wait_done(drawctxt->rb->id, context->id,
timestamp, ret);
return ret;
}
static int _check_context_timestamp(struct kgsl_device *device,
struct kgsl_context *context, unsigned int timestamp)
{
/* Bail if the drawctxt has been invalidated or destroyed */
if (kgsl_context_detached(context) || kgsl_context_invalid(context))
return 1;
return kgsl_check_timestamp(device, context, timestamp);
}
static int _check_context_timestamp(struct kgsl_device *device,
struct adreno_context *drawctxt, unsigned int timestamp)
{
int ret = 0;
/* Bail if the drawctxt has been invalidated or destroyed */
if (kgsl_context_detached(&drawctxt->base) ||
kgsl_context_invalid(&drawctxt->base))
return 1;
mutex_lock(&device->mutex);
ret = kgsl_check_timestamp(device, &drawctxt->base, timestamp);
mutex_unlock(&device->mutex);
return ret;
}
static int _check_global_timestamp(struct kgsl_device *device,
struct kgsl_context *context, struct adreno_ringbuffer *rb,
unsigned int timestamp)
{
unsigned int ts_processed;
/* Stop waiting if the context is invalidated */
if (kgsl_context_invalid(context))
return 1;
/* Failure to read return false */
if (adreno_rb_readtimestamp(device, rb, KGSL_TIMESTAMP_RETIRED,
&ts_processed))
return 0;
return (timestamp_cmp(ts_processed, timestamp) >= 0);
}
static int adreno_drawctxt_wait_global(struct adreno_device *adreno_dev,
struct kgsl_context *context,
uint32_t timestamp, unsigned int timeout)
{
struct kgsl_device *device = &adreno_dev->dev;
struct adreno_context *drawctxt = ADRENO_CONTEXT(context);
struct adreno_ringbuffer *rb = drawctxt->rb;
int ret = 0;
/* Needs to hold the device mutex */
BUG_ON(!mutex_is_locked(&device->mutex));
if (!_kgsl_context_get(context)) {
ret = -EINVAL;
goto done;
}
/*
* If the context is invalid then return immediately - we may end up
* waiting for a timestamp that will never come
*/
if (kgsl_context_invalid(context)) {
kgsl_context_put(context);
goto done;
}
trace_adreno_drawctxt_wait_start(KGSL_MEMSTORE_GLOBAL, timestamp);
ret = kgsl_add_event(device, &(rb->events), timestamp,
global_wait_callback, (void *) drawctxt);
if (ret) {
kgsl_context_put(context);
goto done;
}
mutex_unlock(&device->mutex);
if (timeout) {
ret = (int) wait_event_timeout(drawctxt->waiting,
_check_global_timestamp(device, context, rb, timestamp),
msecs_to_jiffies(timeout));
if (ret == 0)
ret = -ETIMEDOUT;
else if (ret > 0)
ret = 0;
} else {
wait_event(drawctxt->waiting,
_check_global_timestamp(device, context, rb,
timestamp));
}
mutex_lock(&device->mutex);
if (ret)
kgsl_cancel_events_timestamp(device,
&(rb->events), timestamp);
done:
trace_adreno_drawctxt_wait_done(KGSL_MEMSTORE_GLOBAL, timestamp, ret);
return ret;
}
