[PATCH v13 09/21] net: lwip: add DHCP support and dhcp commmand
Ilias Apalodimas
ilias.apalodimas at linaro.org
Wed Oct 16 15:28:43 CEST 2024
On Wed, 16 Oct 2024 at 13:04, Jerome Forissier
<jerome.forissier at linaro.org> wrote:
>
> Add what it takes to enable NETDEVICES with NET_LWIP and enable DHCP as
> well as the dhcp command. CMD_TFTPBOOT is selected by BOOTMETH_EFI due
> to this code having an implicit dependency on do_tftpb().
>
> Note that PXE is likely non-fonctional with NET_LWIP (or at least not
> 100% functional) because DHCP option 209 is not supported by the lwIP
> library. Therefore, BOOTP_PXE_DHCP_OPTION cannot be enabled.
>
> Signed-off-by: Jerome Forissier <jerome.forissier at linaro.org>
> Tested-by: Ilias Apalodimas <ilias.apalodimas at linaro.org>
> ---
> board/engicam/imx8mp/icore_mx8mp.c | 2 +-
> .../imx8mp_debix_model_a.c | 2 +-
> board/ti/am335x/board.c | 3 +-
> board/xilinx/common/board.c | 3 +-
> cmd/Kconfig | 100 +++---
> cmd/Makefile | 6 +-
> cmd/elf.c | 2 +-
> cmd/net-lwip.c | 13 +
> common/board_r.c | 4 +-
> common/usb_kbd.c | 2 +-
> drivers/net/Kconfig | 2 +-
> include/net-common.h | 3 +
> include/net-legacy.h | 3 -
> include/net-lwip.h | 3 +
> lib/tiny-printf.c | 3 +-
> net/Makefile | 14 +-
> net/lwip/Makefile | 5 +
> net/lwip/dhcp.c | 130 ++++++++
> net/lwip/eth_internal.h | 35 +++
> net/lwip/net-lwip.c | 289 ++++++++++++++++++
> net/lwip/tftp.c | 11 +
> 21 files changed, 573 insertions(+), 62 deletions(-)
> create mode 100644 cmd/net-lwip.c
> create mode 100644 net/lwip/Makefile
> create mode 100644 net/lwip/dhcp.c
> create mode 100644 net/lwip/eth_internal.h
> create mode 100644 net/lwip/net-lwip.c
> create mode 100644 net/lwip/tftp.c
>
> diff --git a/board/engicam/imx8mp/icore_mx8mp.c b/board/engicam/imx8mp/icore_mx8mp.c
> index e2ed70caa43..bfdc447c478 100644
> --- a/board/engicam/imx8mp/icore_mx8mp.c
> +++ b/board/engicam/imx8mp/icore_mx8mp.c
> @@ -33,7 +33,7 @@ static void setup_fec(void)
> setbits_le32(&gpr->gpr[1], BIT(22));
> }
>
> -#if CONFIG_IS_ENABLED(NET)
> +#if CONFIG_IS_ENABLED(NET) || CONFIG_IS_ENABLED(NET_LWIP)
> int board_phy_config(struct phy_device *phydev)
> {
> if (phydev->drv->config)
> diff --git a/board/polyhex/imx8mp_debix_model_a/imx8mp_debix_model_a.c b/board/polyhex/imx8mp_debix_model_a/imx8mp_debix_model_a.c
> index 112770ba493..c709d017483 100644
> --- a/board/polyhex/imx8mp_debix_model_a/imx8mp_debix_model_a.c
> +++ b/board/polyhex/imx8mp_debix_model_a/imx8mp_debix_model_a.c
> @@ -29,7 +29,7 @@ static void setup_fec(void)
> setbits_le32(&gpr->gpr[1], BIT(22));
> }
>
> -#if CONFIG_IS_ENABLED(NET)
> +#if CONFIG_IS_ENABLED(NET) || CONFIG_IS_ENABLED(NET_LWIP)
> int board_phy_config(struct phy_device *phydev)
> {
> if (phydev->drv->config)
> diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c
> index 720bf2cb3e1..774ef7ac5e3 100644
> --- a/board/ti/am335x/board.c
> +++ b/board/ti/am335x/board.c
> @@ -900,7 +900,8 @@ int board_late_init(void)
> #endif
>
> /* CPSW plat */
> -#if CONFIG_IS_ENABLED(NET) && !CONFIG_IS_ENABLED(OF_CONTROL)
> +#if (CONFIG_IS_ENABLED(NET) || CONFIG_IS_ENABLED(NET_LWIP)) && \
> + !CONFIG_IS_ENABLED(OF_CONTROL)
> struct cpsw_slave_data slave_data[] = {
> {
> .slave_reg_ofs = CPSW_SLAVE0_OFFSET,
> diff --git a/board/xilinx/common/board.c b/board/xilinx/common/board.c
> index 68f401e4b34..38dd80533fa 100644
> --- a/board/xilinx/common/board.c
> +++ b/board/xilinx/common/board.c
> @@ -491,7 +491,8 @@ int board_late_init_xilinx(void)
> ret |= env_set_by_index("uuid", id, uuid);
> }
>
> - if (!CONFIG_IS_ENABLED(NET))
> + if (!(CONFIG_IS_ENABLED(NET) ||
> + CONFIG_IS_ENABLED(NET_LWIP)))
> continue;
>
> for (i = 0; i < EEPROM_HDR_NO_OF_MAC_ADDR; i++) {
> diff --git a/cmd/Kconfig b/cmd/Kconfig
> index 6d20d7597cb..211be398937 100644
> --- a/cmd/Kconfig
> +++ b/cmd/Kconfig
> @@ -1789,12 +1789,16 @@ config CMD_AB_SELECT
>
> endmenu
>
> -if NET
> +if NET || NET_LWIP
>
> menuconfig CMD_NET
> bool "Network commands"
> default y
>
> +endif
> +
> +if NET
> +
> if CMD_NET
>
> config CMD_BOOTP
> @@ -1803,12 +1807,6 @@ config CMD_BOOTP
> help
> bootp - boot image via network using BOOTP/TFTP protocol
>
> -config CMD_DHCP
> - bool "dhcp"
> - depends on CMD_BOOTP
> - help
> - Boot image via network using DHCP/TFTP protocol
> -
> config CMD_DHCP6
> bool "dhcp6"
> depends on IPV6
> @@ -1952,12 +1950,6 @@ config BOOTP_VCI_STRING
> default "U-Boot.arm" if ARM
> default "U-Boot"
>
> -config CMD_TFTPBOOT
> - bool "tftpboot"
> - default y
> - help
> - tftpboot - load file via network using TFTP protocol
> -
> config CMD_TFTPPUT
> bool "tftp put"
> depends on CMD_TFTPBOOT
> @@ -2017,29 +2009,6 @@ config CMD_WGET
> wget is a simple command to download kernel, or other files,
> from a http server over TCP.
>
> -config CMD_MII
> - bool "mii"
> - imply CMD_MDIO
> - help
> - If set, allows 802.3(clause 22) MII Management functions interface access
> - The management interface specified in Clause 22 provides
> - a simple, two signal, serial interface to connect a
> - Station Management entity and a managed PHY for providing access
> - to management parameters and services.
> - The interface is referred to as the MII management interface.
> -
> -config MII_INIT
> - bool "Call mii_init() in the mii command"
> - depends on CMD_MII && (MPC8XX_FEC || FSLDMAFE || MCFFEC)
> -
> -config CMD_MDIO
> - bool "mdio"
> - depends on PHYLIB
> - help
> - If set, allows Enable 802.3(clause 45) MDIO interface registers access
> - The MDIO interface is orthogonal to the MII interface and extends
> - it by adding access to more registers through indirect addressing.
> -
> config CMD_PING
> bool "ping"
> help
> @@ -2088,7 +2057,7 @@ config IPV6_ROUTER_DISCOVERY
> help
> Will automatically perform router solicitation on first IPv6
> network operation
> -endif
> +endif # if CMD_NET
>
> config CMD_ETHSW
> bool "ethsw"
> @@ -2098,6 +2067,56 @@ config CMD_ETHSW
> operations such as enabling / disabling a port and
> viewing/maintaining the filtering database (FDB)
>
> +config CMD_WOL
> + bool "wol"
> + help
> + Wait for wake-on-lan Magic Packet
> +
> +endif # if NET
> +
> +if NET || NET_LWIP
> +
> +if CMD_NET
> +
> +config CMD_DHCP
> + bool "dhcp"
> + select PROT_DHCP_LWIP if NET_LWIP
> + help
> + Boot image via network using DHCP/TFTP protocol
> +
> +config CMD_MII
> + bool "mii"
> + imply CMD_MDIO
> + help
> + If set, allows 802.3(clause 22) MII Management functions interface access
> + The management interface specified in Clause 22 provides
> + a simple, two signal, serial interface to connect a
> + Station Management entity and a managed PHY for providing access
> + to management parameters and services.
> + The interface is referred to as the MII management interface.
> +
> +config MII_INIT
> + bool "Call mii_init() in the mii command"
> + depends on CMD_MII && (MPC8XX_FEC || FSLDMAFE || MCFFEC)
> +
> +config CMD_MDIO
> + bool "mdio"
> + depends on PHYLIB
> + help
> + If set, allows Enable 802.3(clause 45) MDIO interface registers access
> + The MDIO interface is orthogonal to the MII interface and extends
> + it by adding access to more registers through indirect addressing.
> +
> +config CMD_TFTPBOOT
> + bool "tftp"
> + select PROT_UDP_LWIP if NET_LWIP
> + default n
> + help
> + tftpboot - load file via network using TFTP protocol
> + Currently a placeholder (not implemented) when NET_LWIP=y.
> +
> +endif # if CMD_NET
> +
> config CMD_PXE
> bool "pxe"
> select PXE_UTILS
> @@ -2105,12 +2124,7 @@ config CMD_PXE
> help
> Boot image via network using PXE protocol
>
> -config CMD_WOL
> - bool "wol"
> - help
> - Wait for wake-on-lan Magic Packet
> -
> -endif
> +endif # if NET || NET_LWIP
>
> menu "Misc commands"
>
> diff --git a/cmd/Makefile b/cmd/Makefile
> index 21d376309b9..94a3df41c6f 100644
> --- a/cmd/Makefile
> +++ b/cmd/Makefile
> @@ -127,7 +127,11 @@ obj-y += legacy-mtd-utils.o
> endif
> obj-$(CONFIG_CMD_MUX) += mux.o
> obj-$(CONFIG_CMD_NAND) += nand.o
> -obj-$(CONFIG_CMD_NET) += net.o
> +ifdef CONFIG_CMD_NET
> +obj-$(CONFIG_NET) += net.o
> +obj-$(CONFIG_NET_LWIP) += net-lwip.o
> +CFLAGS_net-lwip.o := -I$(srctree)/lib/lwip/lwip/src/include -I$(srctree)/lib/lwip/u-boot
> +endif
> obj-$(CONFIG_ENV_SUPPORT) += nvedit.o
> obj-$(CONFIG_CMD_NVEDIT_EFI) += nvedit_efi.o
> obj-$(CONFIG_CMD_ONENAND) += onenand.o
> diff --git a/cmd/elf.c b/cmd/elf.c
> index 114f2caf7fa..6b49c613703 100644
> --- a/cmd/elf.c
> +++ b/cmd/elf.c
> @@ -133,7 +133,7 @@ int do_bootvx(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
> else
> addr = hextoul(argv[1], NULL);
>
> -#if defined(CONFIG_CMD_NET)
> +#if defined(CONFIG_CMD_NET) && !defined(CONFIG_NET_LWIP)
> /*
> * Check to see if we need to tftp the image ourselves
> * before starting
> diff --git a/cmd/net-lwip.c b/cmd/net-lwip.c
> new file mode 100644
> index 00000000000..82edb5fd2e6
> --- /dev/null
> +++ b/cmd/net-lwip.c
> @@ -0,0 +1,13 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/* Copyright (C) 2024 Linaro Ltd. */
> +
> +#include <command.h>
> +#include <net.h>
> +
> +#if defined(CONFIG_CMD_DHCP)
> +U_BOOT_CMD(
> + dhcp, 3, 1, do_dhcp,
> + "boot image via network using DHCP/TFTP protocol",
> + "[loadAddress] [[hostIPaddr:]bootfilename]"
> +);
> +#endif
> diff --git a/common/board_r.c b/common/board_r.c
> index 1acad069d92..e5f33f40643 100644
> --- a/common/board_r.c
> +++ b/common/board_r.c
> @@ -484,7 +484,7 @@ static int initr_boot_led_on(void)
> return 0;
> }
>
> -#ifdef CONFIG_CMD_NET
> +#if defined(CONFIG_CMD_NET)
> static int initr_net(void)
> {
> puts("Net: ");
> @@ -749,7 +749,7 @@ static init_fnc_t init_sequence_r[] = {
> #ifdef CONFIG_PCI_ENDPOINT
> pci_ep_init,
> #endif
> -#ifdef CONFIG_CMD_NET
> +#if defined(CONFIG_CMD_NET)
> INIT_FUNC_WATCHDOG_RESET
> initr_net,
> #endif
> diff --git a/common/usb_kbd.c b/common/usb_kbd.c
> index bbfee23bc26..36107a3b278 100644
> --- a/common/usb_kbd.c
> +++ b/common/usb_kbd.c
> @@ -423,7 +423,7 @@ static int usb_kbd_testc(struct stdio_dev *sdev)
> */
> unsigned long poll_delay = CONFIG_SYS_HZ / 50;
>
> -#ifdef CONFIG_CMD_NET
> +#if defined(CONFIG_CMD_NET) && !defined(CONFIG_NET_LWIP)
> /*
> * If net_busy_flag is 1, NET transfer is running,
> * then we check key-pressed every second (first check may be
> diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
> index fa6fc1cb8e4..89f7411bdf3 100644
> --- a/drivers/net/Kconfig
> +++ b/drivers/net/Kconfig
> @@ -97,7 +97,7 @@ config DSA_SANDBOX
>
> menuconfig NETDEVICES
> bool "Network device support"
> - depends on NET
> + depends on NET || NET_LWIP
> select DM_ETH
> help
> You must select Y to enable any network device support
> diff --git a/include/net-common.h b/include/net-common.h
> index 6bc76658d9d..cbcac178c82 100644
> --- a/include/net-common.h
> +++ b/include/net-common.h
> @@ -118,6 +118,9 @@ extern int net_restart_wrap; /* Tried all network devices */
> extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */
> extern const u8 net_bcast_ethaddr[ARP_HLEN]; /* Ethernet broadcast address */
> extern char net_boot_file_name[1024];/* Boot File name */
> +extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */
> +/* Indicates whether the pxe path prefix / config file was specified in dhcp option */
> +extern char *pxelinux_configfile;
>
> /**
> * compute_ip_checksum() - Compute IP checksum
> diff --git a/include/net-legacy.h b/include/net-legacy.h
> index ed286e3d326..ca1efd17af7 100644
> --- a/include/net-legacy.h
> +++ b/include/net-legacy.h
> @@ -285,12 +285,9 @@ extern char net_hostname[32]; /* Our hostname */
> #ifdef CONFIG_NET
> extern char net_root_path[CONFIG_BOOTP_MAX_ROOT_PATH_LEN]; /* Our root path */
> #endif
> -/* Indicates whether the pxe path prefix / config file was specified in dhcp option */
> -extern char *pxelinux_configfile;
> /** END OF BOOTP EXTENTIONS **/
> extern u8 net_ethaddr[ARP_HLEN]; /* Our ethernet address */
> extern u8 net_server_ethaddr[ARP_HLEN]; /* Boot server enet address */
> -extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */
> extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */
> extern uchar *net_tx_packet; /* THE transmit packet */
> extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */
> diff --git a/include/net-lwip.h b/include/net-lwip.h
> index 5c3f9e7e86c..cfd06726577 100644
> --- a/include/net-lwip.h
> +++ b/include/net-lwip.h
> @@ -10,5 +10,8 @@ struct netif *net_lwip_new_netif(struct udevice *udev);
> struct netif *net_lwip_new_netif_noip(struct udevice *udev);
> void net_lwip_remove_netif(struct netif *netif);
> struct netif *net_lwip_get_netif(void);
> +int net_lwip_rx(struct udevice *udev, struct netif *netif);
> +
> +int do_dhcp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
>
> #endif /* __NET_LWIP_H__ */
> diff --git a/lib/tiny-printf.c b/lib/tiny-printf.c
> index 64dee779c4a..cc1dfe61cf7 100644
> --- a/lib/tiny-printf.c
> +++ b/lib/tiny-printf.c
> @@ -269,7 +269,8 @@ static int _vprintf(struct printf_info *info, const char *fmt, va_list va)
> }
> break;
> case 'p':
> - if (CONFIG_IS_ENABLED(NET) || _DEBUG) {
> + if (CONFIG_IS_ENABLED(NET) ||
> + CONFIG_IS_ENABLED(NET_LWIP) || _DEBUG) {
> pointer(info, fmt, va_arg(va, void *));
> /*
> * Skip this because it pulls in _ctype which is
> diff --git a/net/Makefile b/net/Makefile
> index 34fe50133a3..209377aeb26 100644
> --- a/net/Makefile
> +++ b/net/Makefile
> @@ -12,11 +12,6 @@ obj-$(CONFIG_CMD_BOOTP) += bootp.o
> obj-$(CONFIG_CMD_CDP) += cdp.o
> obj-$(CONFIG_CMD_DNS) += dns.o
> obj-$(CONFIG_DM_DSA) += dsa-uclass.o
> -obj-$(CONFIG_$(XPL_)DM_ETH) += eth-uclass.o
> -obj-$(CONFIG_$(PHASE_)BOOTDEV_ETH) += eth_bootdev.o
> -obj-$(CONFIG_DM_MDIO) += mdio-uclass.o
> -obj-$(CONFIG_DM_MDIO_MUX) += mdio-mux-uclass.o
> -obj-$(CONFIG_$(XPL_)DM_ETH) += eth_common.o
> obj-$(CONFIG_CMD_LINK_LOCAL) += link_local.o
> obj-$(CONFIG_IPV6) += ndisc.o
> obj-$(CONFIG_$(XPL_)DM_ETH) += net.o
> @@ -43,4 +38,13 @@ CFLAGS_eth_common.o += -Wno-format-extra-args
>
> endif
>
> +ifeq ($(filter y,$(CONFIG_NET) $(CONFIG_NET_LWIP)),y)
> +obj-$(CONFIG_$(XPL_)DM_ETH) += eth-uclass.o
> +obj-$(CONFIG_$(PHASE_)BOOTDEV_ETH) += eth_bootdev.o
> +obj-$(CONFIG_DM_MDIO) += mdio-uclass.o
> +obj-$(CONFIG_DM_MDIO_MUX) += mdio-mux-uclass.o
> +obj-$(CONFIG_$(XPL_)DM_ETH) += eth_common.o
> obj-y += net-common.o
> +endif
> +
> +obj-$(CONFIG_NET_LWIP) += lwip/
> diff --git a/net/lwip/Makefile b/net/lwip/Makefile
> new file mode 100644
> index 00000000000..4e92a101ddb
> --- /dev/null
> +++ b/net/lwip/Makefile
> @@ -0,0 +1,5 @@
> +ccflags-y += -I$(srctree)/lib/lwip/lwip/src/include -I$(srctree)/lib/lwip/u-boot
> +
> +obj-$(CONFIG_$(SPL_)DM_ETH) += net-lwip.o
> +obj-$(CONFIG_CMD_DHCP) += dhcp.o
> +obj-$(CONFIG_CMD_TFTPBOOT) += tftp.o
> diff --git a/net/lwip/dhcp.c b/net/lwip/dhcp.c
> new file mode 100644
> index 00000000000..a2cc25d88f5
> --- /dev/null
> +++ b/net/lwip/dhcp.c
> @@ -0,0 +1,130 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/* Copyright (C) 2024 Linaro Ltd. */
> +
> +#include <command.h>
> +#include <console.h>
> +#include <dm/device.h>
> +#include <linux/delay.h>
> +#include <linux/errno.h>
> +#include <lwip/dhcp.h>
> +#include <lwip/dns.h>
> +#include <lwip/timeouts.h>
> +#include <net.h>
> +#include <time.h>
> +
> +#define DHCP_TIMEOUT_MS 10000
> +
> +#ifdef CONFIG_CMD_TFTPBOOT
> +/* Boot file obtained from DHCP (if present) */
> +static char boot_file_name[DHCP_BOOT_FILE_LEN];
> +#endif
> +
> +static void call_lwip_dhcp_fine_tmr(void *ctx)
> +{
> + dhcp_fine_tmr();
> + sys_timeout(10, call_lwip_dhcp_fine_tmr, NULL);
> +}
> +
> +static int dhcp_loop(struct udevice *udev)
> +{
> + char *ipstr = "ipaddr\0\0";
> + char *maskstr = "netmask\0\0";
> + char *gwstr = "gatewayip\0\0";
> + unsigned long start;
> + struct netif *netif;
> + struct dhcp *dhcp;
> + bool bound;
> + int idx;
> +
> + idx = dev_seq(udev);
> + if (idx < 0 || idx > 99) {
> + log_err("unexpected idx %d\n", idx);
> + return CMD_RET_FAILURE;
> + }
> +
> + netif = net_lwip_new_netif_noip(udev);
> + if (!netif)
> + return CMD_RET_FAILURE;
> +
> + start = get_timer(0);
> +
> + if (dhcp_start(netif))
> + return CMD_RET_FAILURE;
> +
> + call_lwip_dhcp_fine_tmr(NULL);
> +
> + /* Wait for DHCP to complete */
> + do {
> + net_lwip_rx(udev, netif);
> + sys_check_timeouts();
> + bound = dhcp_supplied_address(netif);
> + if (bound)
> + break;
> + if (ctrlc()) {
> + printf("Abort\n");
> + break;
> + }
> + mdelay(1);
> + } while (get_timer(start) < DHCP_TIMEOUT_MS);
> +
> + sys_untimeout(call_lwip_dhcp_fine_tmr, NULL);
> +
> + if (!bound) {
> + net_lwip_remove_netif(netif);
> + return CMD_RET_FAILURE;
> + }
> +
> + dhcp = netif_dhcp_data(netif);
> +
> + env_set("bootfile", dhcp->boot_file_name);
> +
> + if (idx > 0) {
> + sprintf(ipstr, "ipaddr%d", idx);
> + sprintf(maskstr, "netmask%d", idx);
> + sprintf(gwstr, "gatewayip%d", idx);
> + } else {
> + net_ip.s_addr = dhcp->offered_ip_addr.addr;
> + }
> +
> + env_set(ipstr, ip4addr_ntoa(&dhcp->offered_ip_addr));
> + env_set(maskstr, ip4addr_ntoa(&dhcp->offered_sn_mask));
> + env_set("serverip", ip4addr_ntoa(&dhcp->server_ip_addr));
> + if (dhcp->offered_gw_addr.addr != 0)
> + env_set(gwstr, ip4addr_ntoa(&dhcp->offered_gw_addr));
> +
> +#ifdef CONFIG_PROT_DNS_LWIP
> + env_set("dnsip", ip4addr_ntoa(dns_getserver(0)));
> + env_set("dnsip2", ip4addr_ntoa(dns_getserver(1)));
> +#endif
> +#ifdef CONFIG_CMD_TFTPBOOT
> + if (dhcp->boot_file_name[0] != '\0')
> + strncpy(boot_file_name, dhcp->boot_file_name,
> + sizeof(boot_file_name));
> +#endif
> +
> + printf("DHCP client bound to address %pI4 (%lu ms)\n",
> + &dhcp->offered_ip_addr, get_timer(start));
> +
> + net_lwip_remove_netif(netif);
> + return CMD_RET_SUCCESS;
> +}
> +
> +int do_dhcp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
> +{
> + eth_set_current();
> +
> + return dhcp_loop(eth_get_dev());
> +}
> +
> +int dhcp_run(ulong addr, const char *fname, bool autoload)
> +{
> + char *dhcp_argv[] = {"dhcp", NULL, };
> + struct cmd_tbl cmdtp = {}; /* dummy */
> +
> + if (autoload) {
> + /* Will be supported when TFTP is added */
> + return -EOPNOTSUPP;
> + }
> +
> + return do_dhcp(&cmdtp, 0, 1, dhcp_argv);
> +}
> diff --git a/net/lwip/eth_internal.h b/net/lwip/eth_internal.h
> new file mode 100644
> index 00000000000..0b829a8d388
> --- /dev/null
> +++ b/net/lwip/eth_internal.h
> @@ -0,0 +1,35 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +/*
> + * (C) Copyright 2001-2015
> + * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
> + * Joe Hershberger, National Instruments
> + */
> +
> +#ifndef __ETH_INTERNAL_H
> +#define __ETH_INTERNAL_H
> +
> +/* Do init that is common to driver model and legacy networking */
> +void eth_common_init(void);
> +
> +/**
> + * eth_env_set_enetaddr_by_index() - set the MAC address environment variable
> + *
> + * This sets up an environment variable with the given MAC address (@enetaddr).
> + * The environment variable to be set is defined by <@base_name><@index>addr.
> + * If @index is 0 it is omitted. For common Ethernet this means ethaddr,
> + * eth1addr, etc.
> + *
> + * @base_name: Base name for variable, typically "eth"
> + * @index: Index of interface being updated (>=0)
> + * @enetaddr: Pointer to MAC address to put into the variable
> + * Return: 0 if OK, other value on error
> + */
> +int eth_env_set_enetaddr_by_index(const char *base_name, int index,
> + uchar *enetaddr);
> +
> +int eth_mac_skip(int index);
> +void eth_current_changed(void);
> +void eth_set_dev(struct udevice *dev);
> +void eth_set_current_to_next(void);
> +
> +#endif
> diff --git a/net/lwip/net-lwip.c b/net/lwip/net-lwip.c
> new file mode 100644
> index 00000000000..3b08ffe3b74
> --- /dev/null
> +++ b/net/lwip/net-lwip.c
> @@ -0,0 +1,289 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +/* Copyright (C) 2024 Linaro Ltd. */
> +
> +#include <command.h>
> +#include <dm/device.h>
> +#include <dm/uclass.h>
> +#include <lwip/ip4_addr.h>
> +#include <lwip/err.h>
> +#include <lwip/netif.h>
> +#include <lwip/pbuf.h>
> +#include <lwip/etharp.h>
> +#include <lwip/init.h>
> +#include <lwip/prot/etharp.h>
> +#include <net.h>
> +
> +/* xx:xx:xx:xx:xx:xx\0 */
> +#define MAC_ADDR_STRLEN 18
> +
> +#if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
> +void (*push_packet)(void *, int len) = 0;
> +#endif
> +int net_restart_wrap;
> +static uchar net_pkt_buf[(PKTBUFSRX) * PKTSIZE_ALIGN + PKTALIGN];
> +uchar *net_rx_packets[PKTBUFSRX];
> +uchar *net_rx_packet;
> +const u8 net_bcast_ethaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
> +char *pxelinux_configfile;
> +/* Our IP addr (0 = unknown) */
> +struct in_addr net_ip;
> +
> +static err_t linkoutput(struct netif *netif, struct pbuf *p)
> +{
> + struct udevice *udev = netif->state;
> + void *pp = NULL;
> + int err;
> +
> + if ((unsigned long)p->payload % PKTALIGN) {
> + /*
> + * Some net drivers have strict alignment requirements and may
> + * fail or output invalid data if the packet is not aligned.
> + */
> + pp = memalign(PKTALIGN, p->len);
> + if (!pp)
> + return ERR_ABRT;
> + memcpy(pp, p->payload, p->len);
> + }
> +
> + err = eth_get_ops(udev)->send(udev, pp ? pp : p->payload, p->len);
> + free(pp);
> + if (err) {
> + log_err("send error %d\n", err);
> + return ERR_ABRT;
> + }
> +
> + return ERR_OK;
> +}
> +
> +static err_t net_lwip_if_init(struct netif *netif)
> +{
> + netif->output = etharp_output;
> + netif->linkoutput = linkoutput;
> + netif->mtu = 1500;
> + netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP;
> +
> + return ERR_OK;
> +}
> +
> +static void eth_init_rings(void)
> +{
> + int i;
> +
> + for (i = 0; i < PKTBUFSRX; i++)
> + net_rx_packets[i] = net_pkt_buf + i * PKTSIZE_ALIGN;
> +}
> +
> +struct netif *net_lwip_get_netif(void)
> +{
> + struct netif *netif, *found = NULL;
> +
> + NETIF_FOREACH(netif) {
> + if (!found)
> + found = netif;
> + else
> + printf("Error: more than one netif in lwIP\n");
> + }
> + return found;
> +}
> +
> +static int get_udev_ipv4_info(struct udevice *dev, ip4_addr_t *ip,
> + ip4_addr_t *mask, ip4_addr_t *gw)
> +{
> + char *ipstr = "ipaddr\0\0";
> + char *maskstr = "netmask\0\0";
> + char *gwstr = "gatewayip\0\0";
> + int idx = dev_seq(dev);
> + char *env;
> +
> + if (idx < 0 || idx > 99) {
> + log_err("unexpected idx %d\n", idx);
> + return -1;
> + }
> +
> + if (idx) {
> + sprintf(ipstr, "ipaddr%d", idx);
> + sprintf(maskstr, "netmask%d", idx);
> + sprintf(gwstr, "gatewayip%d", idx);
> + }
> +
> + ip4_addr_set_zero(ip);
> + ip4_addr_set_zero(mask);
> + ip4_addr_set_zero(gw);
> +
> + env = env_get(ipstr);
> + if (env)
> + ip4addr_aton(env, ip);
> +
> + env = env_get(maskstr);
> + if (env)
> + ip4addr_aton(env, mask);
> +
> + env = env_get(gwstr);
> + if (env)
> + ip4addr_aton(env, gw);
> +
> + return 0;
> +}
> +
> +static struct netif *new_netif(struct udevice *udev, bool with_ip)
> +{
> + unsigned char enetaddr[ARP_HLEN];
> + char hwstr[MAC_ADDR_STRLEN];
> + ip4_addr_t ip, mask, gw;
> + struct netif *netif;
> + int ret = 0;
> + static bool first_call = true;
> +
> + if (!udev)
> + return NULL;
> +
> + if (first_call) {
> + eth_init_rings();
> + /* Pick a valid active device, if any */
> + eth_init();
> + lwip_init();
> + first_call = false;
> + }
> +
> + if (eth_start_udev(udev) < 0) {
> + log_err("Could not start %s\n", udev->name);
> + return NULL;
> + }
> +
> + netif_remove(net_lwip_get_netif());
> +
> + ip4_addr_set_zero(&ip);
> + ip4_addr_set_zero(&mask);
> + ip4_addr_set_zero(&gw);
> +
> + if (with_ip)
> + if (get_udev_ipv4_info(udev, &ip, &mask, &gw) < 0)
> + return NULL;
> +
> + eth_env_get_enetaddr_by_index("eth", dev_seq(udev), enetaddr);
> + ret = snprintf(hwstr, MAC_ADDR_STRLEN, "%pM", enetaddr);
> + if (ret < 0 || ret >= MAC_ADDR_STRLEN)
> + return NULL;
> +
> + netif = calloc(1, sizeof(struct netif));
> + if (!netif)
> + return NULL;
> +
> + netif->name[0] = 'e';
> + netif->name[1] = 't';
> +
> + string_to_enetaddr(hwstr, netif->hwaddr);
> + netif->hwaddr_len = ETHARP_HWADDR_LEN;
> + debug("adding lwIP netif for %s with hwaddr:%s ip:%s ", udev->name,
> + hwstr, ip4addr_ntoa(&ip));
> + debug("mask:%s ", ip4addr_ntoa(&mask));
> + debug("gw:%s\n", ip4addr_ntoa(&gw));
> +
> + if (!netif_add(netif, &ip, &mask, &gw, udev, net_lwip_if_init,
> + netif_input)) {
> + printf("error: netif_add() failed\n");
> + free(netif);
> + return NULL;
> + }
> +
> + netif_set_up(netif);
> + netif_set_link_up(netif);
> + /* Routing: use this interface to reach the default gateway */
> + netif_set_default(netif);
> +
> + return netif;
> +}
> +
> +struct netif *net_lwip_new_netif(struct udevice *udev)
> +{
> + return new_netif(udev, true);
> +}
> +
> +struct netif *net_lwip_new_netif_noip(struct udevice *udev)
> +{
> +
> + return new_netif(udev, false);
> +}
> +
> +void net_lwip_remove_netif(struct netif *netif)
> +{
> + netif_remove(netif);
> + free(netif);
> +}
> +
> +int net_init(void)
> +{
> + eth_set_current();
> +
> + net_lwip_new_netif(eth_get_dev());
> +
> + return 0;
> +}
> +
> +static struct pbuf *alloc_pbuf_and_copy(uchar *data, int len)
> +{
> + struct pbuf *p, *q;
> +
> + /* We allocate a pbuf chain of pbufs from the pool. */
> + p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
> + if (!p) {
> + LINK_STATS_INC(link.memerr);
> + LINK_STATS_INC(link.drop);
> + return NULL;
> + }
> +
> + for (q = p; q != NULL; q = q->next) {
> + memcpy(q->payload, data, q->len);
> + data += q->len;
> + }
> +
> + LINK_STATS_INC(link.recv);
> +
> + return p;
> +}
> +
> +int net_lwip_rx(struct udevice *udev, struct netif *netif)
> +{
> + struct pbuf *pbuf;
> + uchar *packet;
> + int flags;
> + int len;
> + int i;
> +
> + if (!eth_is_active(udev))
> + return -EINVAL;
> +
> + flags = ETH_RECV_CHECK_DEVICE;
> + for (i = 0; i < ETH_PACKETS_BATCH_RECV; i++) {
> + len = eth_get_ops(udev)->recv(udev, flags, &packet);
> + flags = 0;
> +
> + if (len > 0) {
> + pbuf = alloc_pbuf_and_copy(packet, len);
> + if (pbuf)
> + netif->input(pbuf, netif);
> + }
> + if (len >= 0 && eth_get_ops(udev)->free_pkt)
> + eth_get_ops(udev)->free_pkt(udev, packet, len);
> + if (len <= 0)
> + break;
> + }
> + if (len == -EAGAIN)
> + len = 0;
> +
> + return len;
> +}
> +
> +void net_process_received_packet(uchar *in_packet, int len)
> +{
> +#if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
> + if (push_packet)
> + (*push_packet)(in_packet, len);
> +#endif
> +}
> +
> +u32_t sys_now(void)
> +{
> + return get_timer(0);
> +}
> diff --git a/net/lwip/tftp.c b/net/lwip/tftp.c
> new file mode 100644
> index 00000000000..1fa246f55d9
> --- /dev/null
> +++ b/net/lwip/tftp.c
> @@ -0,0 +1,11 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/* Copyright (C) 2024 Linaro Ltd. */
> +
> +#include <command.h>
> +#include <net-lwip.h>
> +
> +int do_tftpb(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
> +{
> + /* Not implemented */
> + return CMD_RET_FAILURE;
> +}
> --
> 2.40.1
>
Acked-by: Ilias Apalodimas <ilias.apalodimas at linaro.org>
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