DMA_FENCE_IN_CMD:通过将fd将一个外来的fence传递到driver层,driver中先向该dma-fence添加一个callback回调函数,然后在显示调用wait函数,进程会阻塞直到该dma-fence变成signaled。 DMA_FENCE_OUT_CMD:将driver创建的dma-fence通过fd的方式导出到user层 DMA_FENCE_SIGNAL_CMD:对driver创建的dma-fence调用signal操作 1...
struct module *owner; struct list_head list_node; void *priv; // exporter 提供 struct dma_resv *resv; wait_queue_head_t poll; struct dma_buf_poll_cb_t { // related with poll in userspace struct dma_fence_cb cb; wait_queue_head_t *poll; __poll_t active; } cb_excl, cb_shar...
DMA 栅栏,由 struct dma_fence 表示,是用于 DMA 操作的内核内部同步原语,例如 GPU 渲染、视频编解码或在屏幕上显示缓冲区。 栅栏通过 dma_fence_init() 进行初始化,并通过 dma_fence_signal() 进行完成。栅栏与上下文相关联,通过 dma_fence_context_alloc() 分配,同一上下文中的所有栅栏都是完全有序的。 由于...
DMA Fence(DMA 栅栏) DMA 栅栏,由 struct dma_fence 表示,是用于 DMA 操作的内核内部同步原语,例如 GPU 渲染、视频编解码或在屏幕上显示缓冲区。 栅栏通过 dma_fence_init() 进行初始化,并通过 dma_fence_signal() 进行完成。栅栏与上下文相关联,通过 dma_fence_context_alloc() 分配,同一上下文中的所有栅栏...
* documentation for &dma_fence_ops.set_deadline. * * The deadline hint is just that, a hint. The driver that created the fence * may react by increasing frequency, making different scheduling choices, etc. * Or doing nothing at all. */ /** * dma_fence_set_deadline - set desired ...
ReadUInt32NoFence function ReadUInt32Raw function REENUMERATE_SELF_INTERFACE_STANDARD structure REG_CALLBACK_CONTEXT_CLEANUP_INFORMATION structure REG_CREATE_KEY_INFORMATION structure REG_CREATE_KEY_INFORMATION_V1 structure REG_DELETE_KEY_INFORMATION structure REG_DELETE_VALUE_KEY_INFORMATION structure REG_EN...
102 + const struct dma_fence_ops host1x_syncpt_fence_ops = { 103 + .get_driver_name = host1x_syncpt_fence_get_driver_name, 104 + .get_timeline_name = host1x_syncpt_fence_get_timeline_name, 105 + .enable_signaling = host1x_syncpt_fence_enable_signaling, 106 + .release ...
Fonction ReadUInt32NoFence Fonction ReadUInt32Raw structure REENUMERATE_SELF_INTERFACE_STANDARD structure REG_CALLBACK_CONTEXT_CLEANUP_INFORMATION structure REG_CREATE_KEY_INFORMATION structure REG_CREATE_KEY_INFORMATION_V1 structure REG_DELETE_KEY_INFORMATION structure REG_DELETE_VALUE_KEY_INFORMATION structur...
通过函数drm_sched_init()初始化一个GPU scheduler。其中通过参数const struct drm_sched_backend_ops *ops提供平台相关的回调接口。 struct drm_sched_backend_ops { struct dma_fence *(*dependency)(struct drm_sched_job *sched_job, struct drm_sched_entity *s_entity); ...
*/ static void dma_buf_poll_cb(struct dma_fence *fence, struct dma_fence_cb *cb) { struct dma_buf_poll_cb_t *dcb = (struct dma_buf_poll_cb_t *)cb; struct dma_buf *dmabuf = container_of(dcb->poll, struct dma_buf, poll); unsigned long flags; spin_lock_irqsave(&dcb->poll...