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// SPDX-License-Identifier: GPL-2.0+
/*
* Bootdev for ethernet (uses PXE)
*
* Copyright 2021 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#define LOG_CATEGORY UCLASS_BOOTSTD
#include <bootdev.h>
#include <bootflow.h>
#include <command.h>
#include <bootmeth.h>
#include <dm.h>
#include <extlinux.h>
#include <init.h>
#include <log.h>
#include <net.h>
#include <test/test.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_check_net(iter);
if (ret)
return log_msg_ret("net", ret);
ret = bootmeth_check(bflow->method, iter);
if (ret)
return log_msg_ret("check", ret);
/*
* Like extlinux 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);
/* 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_6_NET_BASE;
return 0;
}
static int eth_bootdev_hunt(struct bootdev_hunter *info, bool show)
{
int ret;
if (!test_eth_enabled())
return 0;
/* init PCI first since this is often used to provide Ehternet */
if (IS_ENABLED(CONFIG_PCI)) {
ret = pci_init();
if (ret)
log_warning("Failed to init PCI (%dE)\n", ret);
}
/*
* Ethernet devices can also come from USB, but that is a higher
* priority (BOOTDEVP_5_SCAN_SLOW) than ethernet, so it should have been
* enumerated already. If something like 'bootflow scan dhcp' is used
* then the user will need to run 'usb start' first.
*/
if (IS_ENABLED(CONFIG_CMD_DHCP)) {
ret = dhcp_run(0, NULL, false);
if (ret)
return -EINVAL;
}
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,
};
BOOTDEV_HUNTER(eth_bootdev_hunt) = {
.prio = BOOTDEVP_6_NET_BASE,
.uclass = UCLASS_ETH,
.hunt = eth_bootdev_hunt,
.drv = DM_DRIVER_REF(eth_bootdev),
};
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