mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-12 06:12:58 +00:00
c2ee5ee7b3
Replace 'disto' with 'distro' since they are all functions about distro booting. Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
186 lines
4.2 KiB
C
186 lines
4.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Bootmethod for distro boot using PXE (network boot)
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*
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* Copyright 2021 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#define LOG_CATEGORY UCLASS_BOOTSTD
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#include <common.h>
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#include <bootdev.h>
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#include <bootflow.h>
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#include <bootmeth.h>
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#include <command.h>
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#include <distro.h>
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#include <dm.h>
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#include <fs.h>
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#include <log.h>
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#include <malloc.h>
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#include <mapmem.h>
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#include <mmc.h>
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#include <net.h>
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#include <pxe_utils.h>
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static int distro_pxe_getfile(struct pxe_context *ctx, const char *file_path,
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char *file_addr, ulong *sizep)
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{
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struct distro_info *info = ctx->userdata;
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ulong addr;
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int ret;
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addr = simple_strtoul(file_addr, NULL, 16);
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ret = bootmeth_read_file(info->dev, info->bflow, file_path, addr,
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sizep);
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if (ret)
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return log_msg_ret("read", ret);
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return 0;
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}
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static int distro_pxe_check(struct udevice *dev, struct bootflow_iter *iter)
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{
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int ret;
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/* This only works on network devices */
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ret = bootflow_iter_uses_network(iter);
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if (ret)
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return log_msg_ret("net", ret);
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return 0;
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}
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static int distro_pxe_read_bootflow(struct udevice *dev, struct bootflow *bflow)
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{
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const char *addr_str;
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char fname[200];
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char *bootdir;
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ulong addr;
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ulong size;
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char *buf;
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int ret;
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addr_str = env_get("pxefile_addr_r");
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if (!addr_str)
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return log_msg_ret("pxeb", -EPERM);
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addr = simple_strtoul(addr_str, NULL, 16);
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log_debug("calling pxe_get()\n");
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ret = pxe_get(addr, &bootdir, &size);
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log_debug("pxe_get() returned %d\n", ret);
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if (ret)
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return log_msg_ret("pxeb", ret);
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bflow->size = size;
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/* Use the directory of the dhcp bootdir as our subdir, if provided */
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if (bootdir) {
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const char *last_slash;
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int path_len;
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last_slash = strrchr(bootdir, '/');
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if (last_slash) {
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path_len = (last_slash - bootdir) + 1;
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bflow->subdir = malloc(path_len + 1);
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memcpy(bflow->subdir, bootdir, path_len);
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bflow->subdir[path_len] = '\0';
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}
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}
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snprintf(fname, sizeof(fname), "%s%s",
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bflow->subdir ? bflow->subdir : "", DISTRO_FNAME);
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bflow->fname = strdup(fname);
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if (!bflow->fname)
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return log_msg_ret("name", -ENOMEM);
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bflow->state = BOOTFLOWST_READY;
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/* Allocate the buffer, including the \0 byte added by get_pxe_file() */
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buf = malloc(size + 1);
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if (!buf)
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return log_msg_ret("buf", -ENOMEM);
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memcpy(buf, map_sysmem(addr, 0), size + 1);
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bflow->buf = buf;
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return 0;
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}
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static int distro_pxe_read_file(struct udevice *dev, struct bootflow *bflow,
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const char *file_path, ulong addr, ulong *sizep)
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{
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char *tftp_argv[] = {"tftp", NULL, NULL, NULL};
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struct pxe_context *ctx = dev_get_priv(dev);
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char file_addr[17];
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ulong size;
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int ret;
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sprintf(file_addr, "%lx", addr);
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tftp_argv[1] = file_addr;
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tftp_argv[2] = (void *)file_path;
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if (do_tftpb(ctx->cmdtp, 0, 3, tftp_argv))
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return -ENOENT;
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ret = pxe_get_file_size(&size);
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if (ret)
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return log_msg_ret("tftp", ret);
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if (size > *sizep)
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return log_msg_ret("spc", -ENOSPC);
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*sizep = size;
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return 0;
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}
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static int distro_pxe_boot(struct udevice *dev, struct bootflow *bflow)
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{
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struct pxe_context *ctx = dev_get_priv(dev);
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struct cmd_tbl cmdtp = {}; /* dummy */
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struct distro_info info;
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ulong addr;
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int ret;
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addr = map_to_sysmem(bflow->buf);
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info.dev = dev;
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info.bflow = bflow;
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info.cmdtp = &cmdtp;
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ret = pxe_setup_ctx(ctx, &cmdtp, distro_pxe_getfile, &info, false,
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bflow->subdir);
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if (ret)
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return log_msg_ret("ctx", -EINVAL);
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ret = pxe_process(ctx, addr, false);
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if (ret)
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return log_msg_ret("bread", -EINVAL);
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return 0;
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}
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static int distro_bootmeth_pxe_bind(struct udevice *dev)
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{
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struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);
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plat->desc = IS_ENABLED(CONFIG_BOOTSTD_FULL) ?
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"PXE boot from a network device" : "PXE";
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return 0;
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}
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static struct bootmeth_ops distro_bootmeth_pxe_ops = {
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.check = distro_pxe_check,
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.read_bootflow = distro_pxe_read_bootflow,
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.read_file = distro_pxe_read_file,
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.boot = distro_pxe_boot,
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};
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static const struct udevice_id distro_bootmeth_pxe_ids[] = {
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{ .compatible = "u-boot,distro-pxe" },
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{ }
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};
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U_BOOT_DRIVER(bootmeth_pxe) = {
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.name = "bootmeth_pxe",
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.id = UCLASS_BOOTMETH,
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.of_match = distro_bootmeth_pxe_ids,
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.ops = &distro_bootmeth_pxe_ops,
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.bind = distro_bootmeth_pxe_bind,
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.priv_auto = sizeof(struct pxe_context),
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};
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