AF_XDP and dma

ratheesh kannoth <[email protected]> Fri, 9 Apr 2021 15:06:11 +0530

Newsgroups	org.kernel.vger.xdp-newbies
Message-ID	<CAGZFCEHR2brK5yoMZt=GsaZtg_0XB+sb-XLz_m5WjZr9xQDP3A@mail.gmail.com>

Hi List,

Could you help with the below query ?

if userspace allocates UMEM memory in non contiguous physical memory
 (contiguous in virual address space),  how can i configure DMA ?

https://github.com/xdp-project/xdp-tutorial  AF_XDP example uses
posix_memalign(). will it ensure each buffer chunk is in contiguous
physical address space ?

-Ratheesh