[PATHv11 03/43] net/lwip: integrate lwIP library
Maxim Uvarov
maxim.uvarov at linaro.org
Mon Nov 27 13:56:46 CET 2023
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 at linaro.org>
---
net/Kconfig | 3 ++
net/Makefile | 1 +
net/lwip/Kconfig | 33 ++++++++++++++++++++++
net/lwip/Makefile | 64 ++++++++++++++++++++++++++++++++++++++++++
net/lwip/lwip-external | 2 +-
net/net.c | 44 ++++++++++++++++++++++-------
6 files changed, 136 insertions(+), 11 deletions(-)
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 64ab7ec740..bda6b383b5 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-$(CONFIG_LWIP) += lwip/
# Disable this warning as it is triggered by:
# sprintf(buf, index ? "foo%d" : "foo", index)
diff --git a/net/lwip/Kconfig b/net/lwip/Kconfig
new file mode 100644
index 0000000000..295261a042
--- /dev/null
+++ b/net/lwip/Kconfig
@@ -0,0 +1,33 @@
+menu "lwIP"
+config LWIP
+ bool "Support LWIP library"
+ help
+ Enable the lwIP library code with
+ all dependencies (commands are implemented with lwIP
+ library. This option is automatically enabled if CONFIG_NET=y.
+ lwIP library (https://git.savannah.nongnu.org/git/lwip.git) provides
+ network stack and application code for U-Boot commands.
+ Please see doc/develop/net_lwip.rst for more details.
+
+menu "LWIP options"
+
+config LWIP_LIB_DEBUG
+ bool "enable debug"
+ default n
+ help
+ Enable DEBUG information for IP stack.
+ File net/lwip/lwipopts.h can be modified
+ to enable specific debug message like
+ raw packets or IP debug.
+
+config LWIP_LIB_NOASSERT
+ bool "disable asserts"
+ default y
+ help
+ Disabling asserts reduces binary size by 16k.
+ lwIP assers are useful for testing, but for
+ the production code we can fight for the size
+ and reduce it with compile out asserts.
+endmenu
+
+endmenu
diff --git a/net/lwip/Makefile b/net/lwip/Makefile
new file mode 100644
index 0000000000..3fd5d34564
--- /dev/null
+++ b/net/lwip/Makefile
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2023 Linaro Ltd. <maxim.uvarov at linaro.org>
+
+ccflags-y += -I$(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/lwip/lwip-external b/net/lwip/lwip-external
index 0a0452b2c3..5e3268cf3e 160000
--- a/net/lwip/lwip-external
+++ b/net/lwip/lwip-external
@@ -1 +1 @@
-Subproject commit 0a0452b2c39bdd91e252aef045c115f88f6ca773
+Subproject commit 5e3268cf3ea16ed4907a55e167fcf7e2b544fb20
diff --git a/net/net.c b/net/net.c
index 0fb2d25077..038ccd8933 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 **/
@@ -393,7 +394,7 @@ static void net_cleanup_loop(void)
net_clear_handlers();
}
-int net_init(void)
+void eth_init_rings(void)
{
static int first_call = 1;
@@ -409,6 +410,17 @@ int net_init(void)
net_rx_packets[i] = net_tx_packet +
(i + 1) * PKTSIZE_ALIGN;
}
+ /* Only need to setup buffer pointers once. */
+ first_call = 0;
+ }
+}
+
+int net_init(void)
+{
+ static int first_call = 1;
+
+ eth_init_rings();
+ if (first_call) {
arp_init();
ndisc_init();
net_clear_handlers();
@@ -453,16 +465,18 @@ int net_loop(enum proto_t protocol)
bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
net_init();
- if (eth_is_on_demand_init()) {
- eth_halt();
- eth_set_current();
- ret = eth_init();
- if (ret < 0) {
+ if (!ulwip_active()) {
+ if (eth_is_on_demand_init()) {
eth_halt();
- return ret;
+ eth_set_current();
+ ret = eth_init();
+ if (ret < 0) {
+ eth_halt();
+ return ret;
+ }
+ } else {
+ eth_init_state_only();
}
- } else {
- eth_init_state_only();
}
restart:
@@ -633,7 +647,7 @@ restart:
*/
for (;;) {
schedule();
- if (arp_timeout_check() > 0)
+ if (!ulwip_active() && (arp_timeout_check() > 0))
time_start = get_timer(0);
if (IS_ENABLED(CONFIG_IPV6)) {
@@ -649,6 +663,16 @@ restart:
*/
eth_rx();
+ if (ulwip_active()) {
+ 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.
*/
--
2.30.2
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