Messages in this thread | | | From | Joakim Tjernlund <> | Subject | uio_dmem_genirq.c and DMA mapping to user space ? | Date | Tue, 12 Sep 2017 12:18:27 +0000 |
| |
Hi
I am trying to use the uio_dmem_genirq.c driver for allocating DMA memory to a PCI device using the uio_pci_generic.c driver.
I got as far as defining an UIO dev containing only Dynamic DMA memory and now I am stuck. I can see how DMA memory is allocated when opening the /dev/uio device but I cannot figure out how to mmap this memory to User space as well so I can share this memory with the PCI device and my user space driver.
What am I missing?
Jocke
| |