Dma-buf poll
WebThe dma-buf subsystem provides the framework for sharing buffers for hardware (DMA) access across multiple device drivers and subsystems, and for synchronizing …
Dma-buf poll
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Webdma_buf - shared buffer object. dbuf_mapped flag to show whether dbuf is mapped or not bytesused number of bytes occupied by data in the plane (payload). length size of this plane (NOT the payload) in bytes. The maximum valid size is MAX_UINT - … WebMar 13, 2024 · Finally, in my FPGA applications, I map the control registers and buffers into the application process and only implement mmap() and poll() in the driver, to give apps …
WebNov 30, 2024 · DOCA DMA provides an API to copy data between DOCA buffers using hardware acceleration, supporting both local and remote memory regions. The library provides an API for executing DMA operations on DOCA buffers, where these buffers WebShared DMA Buffers Reservation Objects DMA Fences Device links Component Helper for Aggregate Drivers Message-based devices InfiniBand and Remote DMA (RDMA) Interfaces Frame Buffer Library Voltage and current regulator API Reset controller API Industrial I/O Input Subsystem Linux USB API Firewire (IEEE 1394) driver Interface Guide
Web+static unsigned int dma_buf_poll (struct file *file, + struct poll_table_struct *wait) + { + struct dma_buf *dmabuf; + struct kds_resource *kds; + unsigned int ret = 0; + + if (!is_dma_buf_file (file)) + return POLLERR; + + dmabuf = file->private_data; + kds = &dmabuf->kds; + + if (poll_does_not_wait (wait)) { WebShare your thoughts today!
Webdmabuf = dentry->d_fsdata; if (unlikely (!dmabuf)) return; BUG_ON (dmabuf->vmapping_counter); /* * If you hit this BUG () it could mean: * * There's a file reference imbalance in dma_buf_poll / dma_buf_poll_cb or somewhere else * * dmabuf->cb_in/out.active are non-0 despite no pending fence callback */
Webdmabuf->ops = ops; dmabuf->size = size; dmabuf->exp_name = exp_name; + init_waitqueue_head(&dmabuf->poll); + dmabuf->cb_excl.poll = dmabuf->cb_shared.poll = &dmabuf->poll; + dmabuf->cb_excl.active = dmabuf->cb_shared.active = 0; + if (!resv) { gracemed pharmacy shelly beachWebJun 14, 2011 · S/G DMA buffers are scattered through memory; they are the way to go if the hardware can do scatter/gather DMA. Depending on the type of buffer being used, the driver will need to include one of the following header files: #include #include #include grace medupe on scandal ageWebApr 11, 2024 · Campaign poll. The position of the flag indicates whether the organization is partisan. Organizations are considered partisan if they operate on behalf of a candidate, … chilling pugWeb2.15.1. Introduction ¶. The videobuf layer functions as a sort of glue layer between a V4L2 driver and user space. It handles the allocation and management of buffers for the storage of video frames. There is a set of functions which can be used to implement many of the standard POSIX I/O system calls, including read (), poll (), and, happily ... grace melo tuftsWebSo, we introduce the concept of direct memory access (DMA) to help pipe data from the ADC (or any other peripheral) to memory. We can also use the DMA controller the other way, too. We start by showing an example of reading a large buffer of test data out over UART via DMA. grace med topeka clinic huntoonWeb* Re: [PATCH] dma-buf/poll: Get a file reference for outstanding fence callbacks 2024-07-23 8:19 ` Michel Dänzer @ 2024-07-23 9:02 ` Daniel Vetter 2024-07-23 9:02 ` Daniel Vetter 1 sibling, 0 replies; 11+ messages in thread From: Daniel ... grace memorial church denverWebThe dma-buf subsystem provides the framework for sharing buffers for hardware (DMA) access across multiple device drivers and subsystems, and for synchronizing … Gpio - Buffer Sharing and Synchronization (dma-buf) - Linux kernel chilling radio