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Kconfig.sam_gmac
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Kconfig.sam_gmac
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# Atmel SAM Ethernet (GMAC) driver configuration options
# Copyright (c) 2016 Piotr Mienkowski
# SPDX-License-Identifier: Apache-2.0
menuconfig ETH_SAM_GMAC
bool "Atmel SAM Ethernet driver"
default y
depends on NET_BUF_FIXED_DATA_SIZE
depends on DT_HAS_ATMEL_SAM_GMAC_ENABLED || \
DT_HAS_ATMEL_SAM0_GMAC_ENABLED
select NOCACHE_MEMORY if ARCH_HAS_NOCACHE_MEMORY_SUPPORT
select MDIO
select ETH_DSA_SUPPORT
help
Enable Atmel SAM MCU Family Ethernet driver.
if ETH_SAM_GMAC
# Workaround for not being able to have commas in macro arguments
DT_ETH_SAM_GMAC_PATH := $(dt_nodelabel_path,gmac)
# Just for readability, to keep the following lines shorter.
DT_ETH_SAM_GMAC_NQ := $(dt_node_int_prop_int,$(DT_ETH_SAM_GMAC_PATH),num-queues)
config ETH_SAM_GMAC_QUEUES
int "Number of active hardware TX and RX queues"
default 1
range 1 $(DT_ETH_SAM_GMAC_NQ) if SOC_SERIES_SAME70 || \
SOC_SERIES_SAMV71 || \
SOC_SERIES_SAM4E || \
SOC_SERIES_SAME54
help
Select the number of hardware queues used by the driver. Packets will be
routed to appropriate queues based on their priority.
config ETH_SAM_GMAC_FORCE_QUEUE
bool "Force all traffic to be routed through a specific queue"
depends on ETH_SAM_GMAC_QUEUES > 1
depends on NET_TC_RX_COUNT < 5
help
This option is meant to be used only for debugging. Use it to force all
traffic to be routed through a specific hardware queue. With this enabled
it is easier to verify whether the chosen hardware queue actually works.
This works only if there are four or fewer RX traffic classes enabled, as
the SAM GMAC hardware supports screening up to four traffic classes.
config ETH_SAM_GMAC_FORCED_QUEUE
int "Queue to force the packets to"
depends on ETH_SAM_GMAC_FORCE_QUEUE
default 0
range 0 1 if ETH_SAM_GMAC_QUEUES = 2
range 0 2 if ETH_SAM_GMAC_QUEUES = 3
range 0 3 if ETH_SAM_GMAC_QUEUES = 4
range 0 4 if ETH_SAM_GMAC_QUEUES = 5
range 0 5 if ETH_SAM_GMAC_QUEUES = 6
help
Which queue to force the routing to. This affects both the TX and RX queues
setup.
config ETH_SAM_GMAC_BUF_RX_COUNT
int "Network RX buffers preallocated by the SAM ETH driver"
default 12
help
Number of network buffers that will be permanently allocated by the
Ethernet driver. These buffers are used in receive path. They are
preallocated by the driver and made available to the GMAC module to be
filled in with incoming data. Their number has to be large enough to fit
at least one complete Ethernet frame. SAM ETH driver will always allocate
that amount of buffers for itself thus reducing the NET_BUF_RX_COUNT
which is a total amount of RX data buffers used by the whole networking
stack. One has to ensure that NET_PKT_RX_COUNT is large enough to
fit at least two Ethernet frames: one being received by the GMAC module
and the other being processed by the higher layer networking stack.
config ETH_SAM_GMAC_MAC_I2C_EEPROM
bool "Read from an I2C EEPROM"
help
Read MAC address from an I2C EEPROM.
if ETH_SAM_GMAC_MAC_I2C_EEPROM
config ETH_SAM_GMAC_MAC_I2C_INT_ADDRESS
hex "I2C EEPROM internal address"
range 0 0xffffffff
help
Internal address of the EEPROM chip where the MAC address is stored.
Chips with 1 to 4 byte internal address size are supported. Address
size has to be configured in a separate Kconfig option.
config ETH_SAM_GMAC_MAC_I2C_INT_ADDRESS_SIZE
int "I2C EEPROM internal address size"
default 1
range 1 4
help
Size (in bytes) of the internal EEPROM address.
endif # ETH_SAM_GMAC_MAC_I2C_EEPROM
config PTP_CLOCK_SAM_GMAC
bool "SAM GMAC PTP clock driver support"
default y
depends on PTP_CLOCK
help
Enable SAM GMAC PTP Clock support.
endif # ETH_SAM_GMAC