Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32f4/STM32F405/Ethernet_DMA/DMABMR#0x0
Ethernet DMA bus mode register
SR
DA
DSL
EDFE
PBL
RTPR
FB
RDP
USP
FPM
AAB
MB
https://github.com/modm-io/cmsis-svd-stm32