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https://stackoverflow.com/questions/44286683/check-for-iommu-support-on-linux
Better then checking the kernel log is using the command: virt-host-validate. I agree this belongs on unix.stackexchange.com, but this question is still the first hit when googling for 'linux check iommu support'. – Andreas Raster Dec 13 '17 at 20:51
https://www.xilinx.com/Attachment/Xilinx_Answer_65444_Linux.pdf
Check the installed devices to certify that an appropriate PCIe DMA device was found Report a passing (return 0) or failing (return 1) result to the screen Note: By default the driver uses interrupts to determine when DMA transfers are completed.
https://unix.stackexchange.com/questions/241978/what-is-proc-dma-is-it-just-for-legacy-support
I reading a Linux book that told me I can check the dma channels by reading /proc/dma. This is what I see when I run cat /proc/dma: 2: floppy 4: cascade I'm confused because that looks like old ... What is /proc/dma? Is it just for legacy support? Ask Question Asked 4 years, 1 month ago. ... mostly to support floppy disk and IDE disk ...
https://forums.xilinx.com/t5/Embedded-Linux/Checking-DMA-from-linux/td-p/747597
Checking DMA from linux? I am trying to figure out the DMAC IP core. In Vivado, under 'Address Editor', with the DMAC connected to an HP port on my Zynq PS7 block, it shows up with an Offset Address at 0x7C400000 and a High Address at 0x7C40FFFF.
https://www.kernel.org/doc/html/latest/driver-api/pci/p2pdma.html
PCI Peer-to-Peer DMA Support ... The second issue is that to make use of existing interfaces in Linux, memory that is used for P2P transactions needs to be backed by struct pages. However, PCI BARs are not typically cache coherent so there are a few corner case gotchas with these pages so developers need to be careful about what they do with ...
https://docs.microsoft.com/en-us/windows-hardware/drivers/devtest/dma-verification
Driver Verifier monitors the driver's behavior and issues bug check 0xE6 if any of these violations occur. See Bug Check 0xE6 (DRIVER_VERIFIER_DMA_VIOLATION) for a list of the bug check parameters. When is DMA Verification Useful? All drivers that use DMA directly (by calling the HAL DMA routines) should be tested with DMA Verification.
https://forums.xilinx.com/xlnx/attachments/xlnx/ELINUX/10658/1/drivers-session4-dma-4public.pdf
Linux DMA Engine Slave API – Page 4 The dmaengine_submit() function submits the descriptor to the DMA engine to be put into the pending queue –The returned cookie can be used to check the progress The dma_async_issue_pending() function is used to start the DMA transaction by issuing a pending DMA request and wait for callback notification
https://www.kernel.org/doc/html/v4.19/driver-api/dmaengine/client.html
This returns a cookie can be used to check the progress of DMA engine activity via other DMA engine calls not covered in this document. dmaengine_submit() will not start the DMA operation, it merely adds it to the pending queue. For this, see step 5, dma_async_issue_pending. Issue pending DMA requests and wait for callback notification
http://lkml.iu.edu/hypermail/linux/kernel/1210.3/01540.html
Add support for debug_dma_mapping_error() call to avoid warning from debug_dma_unmap() interface when it checks for mapping error checked status.
https://github.com/torvalds/linux/tree/master/drivers/dma
Linux kernel source tree. Contribute to torvalds/linux development by creating an account on GitHub.
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