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For many GNU/Linux applications in userspace the expectation is to use libgbm to allocate graphics memory while using DMA-BUFs to pass those on as references. Meanwhile applications capable of integra…
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According to the V4L API (https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/vidioc-reqbufs.html):
> Applications can call ioctl VIDIOC_REQBUFS again to change the number of buffers. No…
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### Problem Description
I'm currently interested in p2p data transfer from FPGA (Xilinx Alveo U50) to an AMDGPU. There are already implementation for FPGA-Nvidia GPU at https://github.com/RC4ML/FpgaN…
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I'm running your driver on an xilinx embedded linux (built w/ petalinux 2017.3) and a Zynq Ultrascale device, and when I run the speed test /loopback test, dma_map_sg returns 0 and errors out. My HW i…
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Context:
- RK3588 support multi-core encoding for spliting (`HAVE_VEPU2_JPEG`)
- partions_group allocation uses `MPP_BUFFER_TYPE_DMA_HEAP` on hal_jpege_vepu2 task execution
- dma heap is not enabl…
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Zerocopy should also be supported for ehci controllers. At least ehci and ohci controllers must be detected and ensured that everything still works on these devices.
Idea:
check if devices's dma_mask…
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After an entertaining journey through the BLE serialization library and new scheduler code, @hudson-ayers and I believe we have tracked down why running the imix/hail app with the `whileone` app no lo…
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I think the kernel module is technically using the DMA API incorrectly. dma_map_page and dma_map_single are supposed to be for 'streaming DMA' where you write to the buffer in userspace, then dma_map …
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Hi,
I am trying to setup ntrdma(https://github.com/ntrdma/ntrdma-ext) with Intel Skylake b2b configuration on Linux 4.14.178.
Following is how my memory windows are setup:
1) MW[0] (BAR23): dma_a…
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Hello all,
first off: very cool that _nxdrvlinux_ is on Github now!
Actual question: we have been trying to get `xChannelIORead` working in _DMA_ mode to see if this will result in lower CPU loa…