[PATCH v4 02/14] net: introduce alternative implementation as net-lwip/
Jerome Forissier
jerome.forissier at linaro.org
Mon Jun 17 17:32:54 CEST 2024
Prepare the introduction of the lwIP (lightweight IP) TCP/IP stack by
adding a new net-lwip/ directory and the NET_LWIP symbol. Network
support is either NO_NET, NET (legacy stack) or NET_LWIP. Subsequent
commits will introduce the lwIP code, re-work the NETDEVICE integration
and port some of the NET commands and features to lwIP.
SPL_NET cannot be enabled when NET_LWIP=y. SPL_NET pulls some symbols
that are part of NET (such as arp_init(), arp_timeout_check(),
arp_receive(), net_arp_wait_packet_ip()). lwIP support in SPL may be
added later.
Similarly, DFU_TFTP and FASTBOOT are not compatible with NET_LWIP
because of dependencies on net_loop(), tftp_timeout_ms,
tftp_timeout_count_max and other NET things. Let's add a dependency on
!NET_LWIP for now.
As for SANDBOX, NET_LWIP cannot be used either because of strong
assumptions on the network stack. Make NET_LWIP depend on !SANDBOX so
that the NET_LWIP alternative is not visible in make menuconfig when
sandbox_defconfig is used.
Signed-off-by: Jerome Forissier <jerome.forissier at linaro.org>
---
Kconfig | 41 ++++++++++++++++++++++++++++++++++++++
Makefile | 2 +-
common/Kconfig | 2 +-
common/spl/Kconfig | 1 +
drivers/dfu/Kconfig | 1 +
drivers/fastboot/Kconfig | 1 +
drivers/net/Kconfig | 1 +
drivers/net/phy/Kconfig | 2 +-
drivers/usb/gadget/Kconfig | 2 +-
net-lwip/Kconfig | 37 ++++++++++++++++++++++++++++++++++
net/Kconfig | 14 -------------
11 files changed, 86 insertions(+), 18 deletions(-)
create mode 100644 net-lwip/Kconfig
diff --git a/Kconfig b/Kconfig
index 82df59f176e..cfe2a6d3eac 100644
--- a/Kconfig
+++ b/Kconfig
@@ -745,7 +745,48 @@ source "dts/Kconfig"
source "env/Kconfig"
+choice
+ prompt "Networking stack"
+ default NET
+
+config NO_NET
+ bool "No networking support"
+
+config NET
+ bool "Legacy U-Boot networking stack"
+ imply NETDEVICES
+
+config NET_LWIP
+ bool "Use lwIP for networking stack"
+ imply NETDEVICES
+ depends on !SANDBOX
+ help
+ Include networking support based on the lwIP (lightweight IP)
+ TCP/IP stack (https://nongnu.org/lwip). This is a replacement for
+ the default U-Boot network stack and applications located in net/
+ and enabled via CONFIG_NET as well as other pieces of code that
+ depend on CONFIG_NET (such as cmd/net.c enabled via CONFIG_CMD_NET).
+ Therefore the two symbols CONFIG_NET and CONFIG_NET_LWIP are mutually
+ exclusive.
+
+endchoice
+
+if NET
source "net/Kconfig"
+endif
+
+if NET_LWIP
+source "net-lwip/Kconfig"
+endif
+
+config SYS_RX_ETH_BUFFER
+ int "Number of receive packet buffers"
+ default 4
+ help
+ Defines the number of Ethernet receive buffers. On some Ethernet
+ controllers it is recommended to set this value to 8 or even higher,
+ since all buffers can be full shortly after enabling the interface on
+ high Ethernet traffic.
source "drivers/Kconfig"
diff --git a/Makefile b/Makefile
index f8206b2e30a..ceb99a2698e 100644
--- a/Makefile
+++ b/Makefile
@@ -859,7 +859,7 @@ libs-$(CONFIG_OF_EMBED) += dts/
libs-y += env/
libs-y += lib/
libs-y += fs/
-libs-y += net/
+libs-$(CONFIG_NET) += net/
libs-y += disk/
libs-y += drivers/
libs-$(CONFIG_SYS_FSL_DDR) += drivers/ddr/fsl/
diff --git a/common/Kconfig b/common/Kconfig
index 5e3070e9253..807b726384d 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -424,7 +424,7 @@ config LOGF_FUNC_PAD
config LOG_SYSLOG
bool "Log output to syslog server"
- depends on NET
+ depends on NET || NET_LWIP
help
Enables a log driver which broadcasts log records via UDP port 514
to syslog servers.
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 6405374bcc1..f67f0a859db 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -1055,6 +1055,7 @@ config SPL_DM_SPI_FLASH
config SPL_NET
bool "Support networking"
+ depends on !NET_LWIP
help
Enable support for network devices (such as Ethernet) in SPL.
This permits SPL to load U-Boot over a network link rather than
diff --git a/drivers/dfu/Kconfig b/drivers/dfu/Kconfig
index 0360d9da142..6405a23574e 100644
--- a/drivers/dfu/Kconfig
+++ b/drivers/dfu/Kconfig
@@ -20,6 +20,7 @@ config DFU_WRITE_ALT
config DFU_TFTP
bool "DFU via TFTP"
depends on NETDEVICES
+ depends on !NET_LWIP
select UPDATE_COMMON
select DFU_OVER_TFTP
help
diff --git a/drivers/fastboot/Kconfig b/drivers/fastboot/Kconfig
index 70207573de2..1eb460f5a02 100644
--- a/drivers/fastboot/Kconfig
+++ b/drivers/fastboot/Kconfig
@@ -1,5 +1,6 @@
menu "Fastboot support"
depends on CMDLINE
+ depends on !NET_LWIP
config FASTBOOT
bool
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index b2d7b499766..efc55e45ca8 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -48,6 +48,7 @@ config DM_DSA
bool "Enable Driver Model for DSA switches"
depends on DM_MDIO
depends on PHY_FIXED
+ depends on !NET_LWIP
help
Enable driver model for DSA switches
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 3d96938eaba..738752d29c2 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -11,7 +11,7 @@ config MV88E6352_SWITCH
menuconfig PHYLIB
bool "Ethernet PHY (physical media interface) support"
- depends on NET
+ depends on NET || NET_LWIP
help
Enable Ethernet PHY (physical media interface) support.
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 4621a6fd5e6..03fe3bca197 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -224,7 +224,7 @@ endif # USB_GADGET_DOWNLOAD
config USB_ETHER
bool "USB Ethernet Gadget"
- depends on NET
+ depends on NET || NET_LWIP
default y if ARCH_SUNXI && USB_MUSB_GADGET
help
Creates an Ethernet network device through a USB peripheral
diff --git a/net-lwip/Kconfig b/net-lwip/Kconfig
new file mode 100644
index 00000000000..a0938964b51
--- /dev/null
+++ b/net-lwip/Kconfig
@@ -0,0 +1,37 @@
+#
+# Network configuration (with lwIP stack)
+#
+
+config LWIP_DEBUG
+ bool "Enable debug traces in the lwIP library"
+
+config LWIP_ASSERT
+ bool "Enable assertions in the lwIP library"
+
+config PROT_DHCP_LWIP
+ bool "DHCP support in lwIP"
+ depends on PROT_UDP_LWIP
+ help
+ Enable support for the DHCP protocol in lwIP.
+
+config PROT_DNS_LWIP
+ bool
+ depends on PROT_UDP_LWIP
+
+config PROT_RAW_LWIP
+ bool
+
+config PROT_TCP_LWIP
+ bool
+
+config PROT_UDP_LWIP
+ bool
+
+config BOOTDEV_ETH
+ bool "Enable bootdev for ethernet"
+ depends on BOOTSTD
+ default y
+ help
+ Provide a bootdev for ethernet so that is it possible to boot
+ an operating system over the network, using the PXE (Preboot
+ Execution Environment) protocol.
diff --git a/net/Kconfig b/net/Kconfig
index 5dff6336293..4929428d2a5 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -2,11 +2,6 @@
# Network configuration
#
-menuconfig NET
- bool "Networking support"
- default y
- imply NETDEVICES
-
if NET
config ARP_TIMEOUT
@@ -254,12 +249,3 @@ config IPV6
address and find it, it will force using IPv6 in the network stack.
endif # if NET
-
-config SYS_RX_ETH_BUFFER
- int "Number of receive packet buffers"
- default 4
- help
- Defines the number of Ethernet receive buffers. On some Ethernet
- controllers it is recommended to set this value to 8 or even higher,
- since all buffers can be full shortly after enabling the interface on
- high Ethernet traffic.
--
2.40.1
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