diff options
Diffstat (limited to 'net/eth_bootdev.c')
-rw-r--r-- | net/eth_bootdev.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/net/eth_bootdev.c b/net/eth_bootdev.c new file mode 100644 index 0000000000..b735966d2b --- /dev/null +++ b/net/eth_bootdev.c @@ -0,0 +1,101 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Bootdevice for ethernet (uses PXE) + * + * Copyright 2021 Google LLC + * Written by Simon Glass <sjg@chromium.org> + */ + +#include <common.h> +#include <bootdev.h> +#include <bootflow.h> +#include <command.h> +#include <bootmeth.h> +#include <distro.h> +#include <dm.h> +#include <log.h> +#include <net.h> + +static int eth_get_bootflow(struct udevice *dev, struct bootflow_iter *iter, + struct bootflow *bflow) +{ + char name[60]; + int ret; + + /* Must be an Ethernet device */ + ret = bootflow_iter_uses_network(iter); + if (ret) + return log_msg_ret("net", ret); + + ret = bootmeth_check(bflow->method, iter); + if (ret) + return log_msg_ret("check", ret); + + /* + * Like distro boot, this assumes there is only one Ethernet device. + * In this case, that means that @eth is ignored + */ + + snprintf(name, sizeof(name), "%s.%d", dev->name, iter->part); + bflow->name = strdup(name); + if (!bflow->name) + return log_msg_ret("name", -ENOMEM); + + /* + * There is not a direct interface to the network stack so run + * everything through the command-line interpreter for now. + * + * Don't bother checking the result of dhcp. It can fail with: + * + * DHCP client bound to address 192.168.4.50 (4 ms) + * *** Warning: no boot file name; using 'C0A80432.img' + * Using smsc95xx_eth device + * TFTP from server 192.168.4.1; our IP address is 192.168.4.50 + * Filename 'C0A80432.img'. + * Load address: 0x200000 + * Loading: * + * TFTP error: 'File not found' (1) + * + * This is not a real failure, since we don't actually care if the + * boot file exists. + */ + log_debug("running dhcp\n"); + run_command("dhcp", 0); + bflow->state = BOOTFLOWST_MEDIA; + + /* See distro_pxe_read_bootflow() for the standard impl of this */ + log_debug("dhcp complete - reading bootflow with method %s\n", + bflow->method->name); + ret = bootmeth_read_bootflow(bflow->method, bflow); + log_debug("reading bootflow returned %d\n", ret); + if (ret) + return log_msg_ret("method", ret); + + return 0; +} + +static int eth_bootdev_bind(struct udevice *dev) +{ + struct bootdev_uc_plat *ucp = dev_get_uclass_plat(dev); + + ucp->prio = BOOTDEVP_4_NET_BASE; + + return 0; +} + +struct bootdev_ops eth_bootdev_ops = { + .get_bootflow = eth_get_bootflow, +}; + +static const struct udevice_id eth_bootdev_ids[] = { + { .compatible = "u-boot,bootdev-eth" }, + { } +}; + +U_BOOT_DRIVER(eth_bootdev) = { + .name = "eth_bootdev", + .id = UCLASS_BOOTDEV, + .ops = ð_bootdev_ops, + .bind = eth_bootdev_bind, + .of_match = eth_bootdev_ids, +}; |