You can find the official P4 website at https://p4.org/.
Mario just attended a virtual P4 Round-Table and he wrote a blog post about it.
There is also a video of a Roundatable on Programmable NICs:
and a talk about DSC architecture:
My book has a full Chapter on P4 (Chapter 11). Don’t Forget that Pearson/Addison-Wesley has a special offer on my latest book. To save 35% on the book or eBook go to the informit website and use code FUTUREPROOF during checkout to apply the discount.
Offer expires December 31, 2020
You can read an independent review of the book here.
The book was also listed in The Top 10 Best Cloud Storage Books You Need to Read in 2020.