esp-idf/components/ethernet/Kconfig

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menu Ethernet
config DMA_RX_BUF_NUM
int "Number of DMA RX buffers"
range 3 20
default 10
help
Number of DMA receive buffers. Each buffer is 1600 bytes.
Buffers are allocated statically.
Larger number of buffers increases throughput.
If enable flow ctrl, the num must be above 9 .
config DMA_TX_BUF_NUM
int "Number of DMA RX buffers"
range 3 20
default 10
help
Number of DMA transmit buffers. Each buffer is 1600 bytes.
Buffers are allocated statically.
Larger number of buffers increases throughput.
config EMAC_L2_TO_L3_RX_BUF_MODE
bool "Enable copy between Layer2 and Layer3"
default n
help
If this options is selected, a copy of each received buffer will be created when
passing it from the Ethernet MAC (L2) to the IP stack (L3). Otherwise, IP stack
will receive pointers to the DMA buffers used by Ethernet MAC.
When Ethernet MAC doesn't have any unused buffers left, it will drop incomming
packets (flow control may help with this problem, to some extent).
The buffers for the IP stack are allocated from the heap, so the total number of
receive buffers is limited by the available heap size, if this option is selected.
If unsure, choose n.
config EMAC_TASK_PRIORITY
int "EMAC_TASK_PRIORITY"
default 20
range 3 22
help
Ethernet MAC task priority.
endmenu