diff options
Diffstat (limited to 'drivers/gpu/drm/panfrost/panfrost_gpu.c')
-rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_gpu.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c index 2faa344d89ee..f0be7e19b13e 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gpu.c +++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c @@ -73,6 +73,13 @@ int panfrost_gpu_soft_reset(struct panfrost_device *pfdev) gpu_write(pfdev, GPU_INT_CLEAR, GPU_IRQ_MASK_ALL); gpu_write(pfdev, GPU_INT_MASK, GPU_IRQ_MASK_ALL); + /* + * All in-flight jobs should have released their cycle + * counter references upon reset, but let us make sure + */ + if (drm_WARN_ON(pfdev->ddev, atomic_read(&pfdev->cycle_counter.use_count) != 0)) + atomic_set(&pfdev->cycle_counter.use_count, 0); + return 0; } @@ -321,6 +328,40 @@ static void panfrost_gpu_init_features(struct panfrost_device *pfdev) pfdev->features.shader_present, pfdev->features.l2_present); } +void panfrost_cycle_counter_get(struct panfrost_device *pfdev) +{ + if (atomic_inc_not_zero(&pfdev->cycle_counter.use_count)) + return; + + spin_lock(&pfdev->cycle_counter.lock); + if (atomic_inc_return(&pfdev->cycle_counter.use_count) == 1) + gpu_write(pfdev, GPU_CMD, GPU_CMD_CYCLE_COUNT_START); + spin_unlock(&pfdev->cycle_counter.lock); +} + +void panfrost_cycle_counter_put(struct panfrost_device *pfdev) +{ + if (atomic_add_unless(&pfdev->cycle_counter.use_count, -1, 1)) + return; + + spin_lock(&pfdev->cycle_counter.lock); + if (atomic_dec_return(&pfdev->cycle_counter.use_count) == 0) + gpu_write(pfdev, GPU_CMD, GPU_CMD_CYCLE_COUNT_STOP); + spin_unlock(&pfdev->cycle_counter.lock); +} + +unsigned long long panfrost_cycle_counter_read(struct panfrost_device *pfdev) +{ + u32 hi, lo; + + do { + hi = gpu_read(pfdev, GPU_CYCLE_COUNT_HI); + lo = gpu_read(pfdev, GPU_CYCLE_COUNT_LO); + } while (hi != gpu_read(pfdev, GPU_CYCLE_COUNT_HI)); + + return ((u64)hi << 32) | lo; +} + void panfrost_gpu_power_on(struct panfrost_device *pfdev) { int ret; |