69 lines
2.1 KiB
Plaintext
69 lines
2.1 KiB
Plaintext
# Synopsys DesignWare MAC configuration options
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# Copyright (c) 2021 BayLibre SAS
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# SPDX-License-Identifier: Apache-2.0
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menuconfig ETH_DWMAC
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bool "Synopsys DesignWare MAC driver"
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default y
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depends on NET_BUF_FIXED_DATA_SIZE
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depends on (SOC_SERIES_STM32H7X && !ETH_STM32_HAL) || MMU
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depends on DT_HAS_SNPS_DESIGNWARE_ETHERNET_ENABLED
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help
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This is a driver for the Synopsys DesignWare MAC, also referred to
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as "DesignWare Cores Ethernet Quality-of-Service". Hardware versions
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4.x and 5.x are supported.
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Platform specific glue support is also required. This driver is
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currently available on targets using the STM32H7X series as an
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alternative to the eth_stm32_hal driver. Support for a generic DT
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and MMU based platform is also provided.
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Not yet implemented:
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- MDIO (currently relying on default PHY config)
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- PTP support
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- VLAN support
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- various hardware offloads (when available)
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if ETH_DWMAC
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config ETH_DWMAC_STM32H7X
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bool
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depends on SOC_SERIES_STM32H7X
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select NOCACHE_MEMORY if ARCH_HAS_NOCACHE_MEMORY_SUPPORT
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default y
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config ETH_DWMAC_MMU
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bool
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depends on MMU
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default y
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config DWMAC_NB_TX_DESCS
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int "Number of entries in the transmit descriptor ring"
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default 16
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range 4 128
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help
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A higher number allows for more packets to be queued which may
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improve throughput, but that requires more transient memory.
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However there must be enough descriptors to hold all fragments
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of a full-size packet to be transmitted or the packet will be
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dropped.
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Fragment size is influenced by CONFIG_NET_BUF_DATA_SIZE.
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config DWMAC_NB_RX_DESCS
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int "Number of entries in the receive descriptor ring"
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default 16
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range 4 128
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help
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Received packets are spread across the required number of fragment
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buffers. Each RX fragment has a size of CONFIG_NET_BUF_DATA_SIZE.
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There is one descriptor entry per fragment.
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A higher number allows for more packets to be received without
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immediate intervention from the CPU but requires more transient
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memory. A smaller number increases the risk of an overflow and
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dropped packets.
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endif # ETH_DWMAC
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