From: Christian Gmeiner Date: Sun, 24 Sep 2017 15:15:20 +0200 Subject: drm/etnaviv: make it possible to allocate multiple events Git-commit: 95a428c17212ddef40909981e118acd6f518dc93 Patch-mainline: v4.15-rc1 References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166 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 Signed-off-by: Lucas Stach Acked-by: Petr Tesarik --- drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 47 ++++++++++++++++++++++------------ 1 file changed, 31 insertions(+), 16 deletions(-) --- 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 et * 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_gp * */ - 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; }