diff options
author | Christian Gmeiner <christian.gmeiner@gmail.com> | 2017-09-24 15:15:20 +0200 |
---|---|---|
committer | Lucas Stach <l.stach@pengutronix.de> | 2017-10-10 11:45:40 +0200 |
commit | 95a428c17212ddef40909981e118acd6f518dc93 (patch) | |
tree | 1b8de3c4610fa253e586e1860f884350826c98ef | |
parent | 355502e03ad26e3c872a0f5c408a4accca57ba7e (diff) | |
download | op-kernel-dev-95a428c17212ddef40909981e118acd6f518dc93.zip op-kernel-dev-95a428c17212ddef40909981e118acd6f518dc93.tar.gz |
drm/etnaviv: make it possible to allocate multiple events
This makes it possible to allocate multiple events under the event
spinlock. This change is needed to support 'sync'-points.
Changes v2 -> v3:
- wait for the completion of all events
- use 10sec timeout regardless of the number of events
- removed validation if there are enough free events
- fixed return value evaluation of event_alloc(..) in etnaviv_gpu_submit(..)
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
-rw-r--r-- | drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 47 |
1 files changed, 31 insertions, 16 deletions
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c index 3b02814..8d961bc 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c @@ -1142,28 +1142,44 @@ int etnaviv_gpu_fence_sync_obj(struct etnaviv_gem_object *etnaviv_obj, * event management: */ -static unsigned int event_alloc(struct etnaviv_gpu *gpu) +static int event_alloc(struct etnaviv_gpu *gpu, unsigned nr_events, + unsigned int *events) { - unsigned long ret, flags; - unsigned int event; + unsigned long flags, timeout = msecs_to_jiffies(10 * 10000); + unsigned i, acquired = 0; - ret = wait_for_completion_timeout(&gpu->event_free, - msecs_to_jiffies(10 * 10000)); - if (!ret) - dev_err(gpu->dev, "wait_for_completion_timeout failed"); + for (i = 0; i < nr_events; i++) { + unsigned long ret; + + ret = wait_for_completion_timeout(&gpu->event_free, timeout); + + if (!ret) { + dev_err(gpu->dev, "wait_for_completion_timeout failed"); + goto out; + } + + acquired++; + timeout = ret; + } spin_lock_irqsave(&gpu->event_spinlock, flags); - /* find first free event */ - event = find_first_zero_bit(gpu->event_bitmap, ETNA_NR_EVENTS); - if (event < ETNA_NR_EVENTS) + for (i = 0; i < nr_events; i++) { + int event = find_first_zero_bit(gpu->event_bitmap, ETNA_NR_EVENTS); + + events[i] = event; set_bit(event, gpu->event_bitmap); - else - event = ~0U; + } spin_unlock_irqrestore(&gpu->event_spinlock, flags); - return event; + return 0; + +out: + for (i = 0; i < acquired; i++) + complete(&gpu->event_free); + + return -EBUSY; } static void event_free(struct etnaviv_gpu *gpu, unsigned int event) @@ -1332,10 +1348,9 @@ int etnaviv_gpu_submit(struct etnaviv_gpu *gpu, * */ - event = event_alloc(gpu); - if (unlikely(event == ~0U)) { + ret = event_alloc(gpu, 1, &event); + if (ret) { DRM_ERROR("no free event\n"); - ret = -EBUSY; goto out_pm_put; } |