Yes, it is a Silcon Image 3114, working fine in DSM 5.2:
[tc@box ~]$ lspci -v -s 01:01
01:01.0 RAID bus controller: Silicon Image, Inc. SiI 3114 [SATALink/SATARaid] Serial ATA Controller (rev 02)
Subsystem: Silicon Image, Inc. Device 7114
...
Kernel driver in use: sata_sil
[tc@box ~]$ ls -l *load/c*/e*
total 4
-rw-r--r-- 1 tc staff 920 Aug 24 06:14 REALLY_README.txt
drwxr-sr-x 3 tc staff 80 Aug 24 06:14 pocopico.e1000e/
drwxr-sr-x 3 root staff 80 Aug 24 06:14 redpill-boot-wait/
drwxr-sr-x 3 tc staff 80 Aug 24 06:14 redpill-misc/
It seems the NIC module is there, the internal controller uses ahci so I don't think it's there.