[PATCHv10 04/15] net/lwip: integrate lwIP library

Maxim Uvarov
2023-09-26T09:44:23Z

Define Makefile and Kconfig to build lwIP inside the U-Boot. We compile
lwIP the same as the main code, plus we can do optimization for size at
compile time with disabling not needed debug asserts, or not used protocols.
So we can tune lwIP configuration specially for U-Boot environments.

Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>
---
net/Kconfig | 3 +++
net/Makefile | 1 +
net/lwip/Kconfig | 25 ++++++++++++++++++
net/lwip/Makefile | 64 +++++++++++++++++++++++++++++++++++++++++++++++
net/net.c | 20 ++++++++++++++-
5 files changed, 112 insertions(+), 1 deletion(-)
create mode 100644 net/lwip/Kconfig
create mode 100644 net/lwip/Makefile

diff --git a/net/Kconfig b/net/Kconfig
index 4215889127..34c1e43c87 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -5,9 +5,12 @@
menuconfig NET
bool "Networking support"
default y
+ imply LWIP

if NET

+source net/lwip/Kconfig
+
config ARP_TIMEOUT
int "Milliseconds before trying ARP again"
default 5000
diff --git a/net/Makefile b/net/Makefile
index 3e2d061338..61930c244e 100644
--- a/net/Makefile
+++ b/net/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_CMD_WOL) += wol.o
obj-$(CONFIG_PROT_UDP) += udp.o
obj-$(CONFIG_PROT_TCP) += tcp.o
obj-$(CONFIG_CMD_WGET) += wget.o
+obj-$(CONFIG_LWIP) += lwip/

# Disable this warning as it is triggered by:
# sprintf(buf, index ? "foo%d" : "foo", index)
diff --git a/net/lwip/Kconfig b/net/lwip/Kconfig
new file mode 100644
index 0000000000..19f987a074
--- /dev/null
+++ b/net/lwip/Kconfig
@@ -0,0 +1,25 @@
+menu "lwIP"
+config LWIP
+ bool "Support LWIP library"
+ help
+ Enable the lwIP library code with
+ all dependencies (commands are implemented with lwIP
+ library. This option is automatically enabled if CONFIG_NET=y.
+ lwIP library (https://git.savannah.nongnu.org/git/lwip.git) provides
+ network stack and application code for U-Boot commands.
+ Please see doc/develop/net_lwip.rst for more details.
+
+menu "LWIP options"
+
+config LWIP_LIB_DEBUG
+ bool "enable debug"
+ default n
+
+config LWIP_LIB_NOASSERT
+ bool "disable asserts"
+ default y
+ help
+ Disabling asserts reduces binary size by 16k.
+endmenu
+
+endmenu
diff --git a/net/lwip/Makefile b/net/lwip/Makefile
new file mode 100644
index 0000000000..3fd5d34564
--- /dev/null
+++ b/net/lwip/Makefile
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2023 Linaro Ltd. <maxim.uvarov@linaro.org>
+
+ccflags-y += -I$(srctree)/net/lwip/port/include
+ccflags-y += -I$(srctree)/net/lwip/lwip-external/src/include -I$(srctree)/net/lwip
+
+obj-$(CONFIG_NET) += lwip-external/src/core/init.o \
+ lwip-external/src/core/def.o \
+ lwip-external/src/core/dns.o \
+ lwip-external/src/core/inet_chksum.o \
+ lwip-external/src/core/ip.o \
+ lwip-external/src/core/mem.o \
+ lwip-external/src/core/memp.o \
+ lwip-external/src/core/netif.o \
+ lwip-external/src/core/pbuf.o \
+ lwip-external/src/core/raw.o \
+ lwip-external/src/core/stats.o \
+ lwip-external/src/core/sys.o \
+ lwip-external/src/core/altcp.o \
+ lwip-external/src/core/altcp_alloc.o \
+ lwip-external/src/core/altcp_tcp.o \
+ lwip-external/src/core/tcp.o \
+ lwip-external/src/core/tcp_in.o \
+ lwip-external/src/core/tcp_out.o \
+ lwip-external/src/core/timeouts.o \
+ lwip-external/src/core/udp.o
+
+# IPv4
+obj-$(CONFIG_NET) += lwip-external/src/core/ipv4/acd.o \
+ lwip-external/src/core/ipv4/autoip.o \
+ lwip-external/src/core/ipv4/dhcp.o \
+ lwip-external/src/core/ipv4/etharp.o \
+ lwip-external/src/core/ipv4/icmp.o \
+ lwip-external/src/core/ipv4/igmp.o \
+ lwip-external/src/core/ipv4/ip4_frag.o \
+ lwip-external/src/core/ipv4/ip4.o \
+ lwip-external/src/core/ipv4/ip4_addr.o
+# IPv6
+obj-$(CONFIG_NET) += lwip-external/src/core/ipv6/dhcp6.o \
+ lwip-external/src/core/ipv6/ethip6.o \
+ lwip-external/src/core/ipv6/icmp6.o \
+ lwip-external/src/core/ipv6/inet6.o \
+ lwip-external/src/core/ipv6/ip6.o \
+ lwip-external/src/core/ipv6/ip6_addr.o \
+ lwip-external/src/core/ipv6/ip6_frag.o \
+ lwip-external/src/core/ipv6/mld6.o \
+ lwip-external/src/core/ipv6/nd6.o
+# API
+obj-$(CONFIG_NET) += lwip-external/src/api/api_lib.o \
+ lwip-external/src/api/api_msg.o \
+ lwip-external/src/api/err.o \
+ lwip-external/src/api/if_api.o \
+ lwip-external/src/api/netbuf.o \
+ lwip-external/src/api/netdb.o \
+ lwip-external/src/api/netifapi.o \
+ lwip-external/src/api/sockets.o \
+ lwip-external/src/api/tcpip.o
+
+# Netdevs
+obj-$(CONFIG_NET) += lwip-external/src/netif/ethernet.o
+
+obj-$(CONFIG_NET) += port/if.o
+obj-$(CONFIG_NET) += port/sys-arch.o
diff --git a/net/net.c b/net/net.c
index 43abbac7c3..d9e566081c 100644
--- a/net/net.c
+++ b/net/net.c
@@ -125,6 +125,7 @@
#endif
#include "dhcpv6.h"
#include "net_rand.h"
+#include <net/ulwip.h>

/** BOOTP EXTENTIONS **/

@@ -452,7 +453,9 @@ int net_loop(enum proto_t protocol)
#endif

bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
- net_init();
+ if (!ulwip_enabled() || !ulwip_in_loop())
+ net_init();
+
if (eth_is_on_demand_init()) {
eth_halt();
eth_set_current();
@@ -649,6 +652,16 @@ restart:
*/
eth_rx();

+ if (ulwip_enabled()) {
+ net_set_state(NETLOOP_CONTINUE);
+ if (!ulwip_in_loop()) {
+ if (ulwip_app_get_err())
+ net_set_state(NETLOOP_FAIL);
+ else
+ net_set_state(NETLOOP_SUCCESS);
+ goto done;
+ }
+ }
/*
* Abort if ctrl-c was pressed.
*/
@@ -1213,6 +1226,11 @@ void net_process_received_packet(uchar *in_packet, int len)
if (len < ETHER_HDR_SIZE)
return;

+ if (ulwip_enabled()) {
+ ulwip_poll();
+ return;
+ }
+
#if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
if (push_packet) {
(*push_packet)(in_packet, len);
--
2.30.2