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ethernet: improve kconfig option descriptions

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Also limit suggested EMAC task priority range to 22, as the top priority
should be used only by IPC tasks.
This commit is contained in:
Ivan Grokhotkov 2017-01-19 00:32:10 +08:00
parent 97e3c0fec4
commit efbd2805e2
1 changed files with 29 additions and 12 deletions
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41
components/ethernet/Kconfig
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@ -5,30 +5,47 @@ menuconfig ETHERNET
Select this option to enable ethernet driver and show the submenu with ethernet features.
config DMA_RX_BUF_NUM
int "DMA Rx Buf Num"
default 10
depends on ETHERNET
help
Dma rx buf num ,can not be 0 .
config DMA_TX_BUF_NUM
int "DMA Tx Buf Num"
int "Number of DMA RX buffers"
range 1 10
default 10
depends on ETHERNET
help
Dma tx Buf num ,can not be 0.
Number of DMA receive buffers. Each buffer is 1600 bytes.
Buffers are allocated statically.
Larger number of buffers increases throughput.
config DMA_TX_BUF_NUM
int "Number of DMA RX buffers"
range 1 10
default 10
depends on ETHERNET
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 "L2 To L3 RX BUF COPY MODE"
bool "Enable copy between Layer2 and Layer3"
default n
depends on ETHERNET
help
Receive Buf user copy mode or pointer mode.
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
depends on ETHERNET
help
Emac task priority ,suggest 3 ~ 23.
Ethernet MAC task priority.