Merge branch 'next' of https://source.denx.de/u-boot/custodians/u-boot-watchdog into...
[platform/kernel/u-boot.git] / boot / bootmeth_efi_mgr.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Bootmethod for EFI boot manager
4  *
5  * Copyright 2021 Google LLC
6  * Written by Simon Glass <sjg@chromium.org>
7  */
8
9 #define LOG_CATEGORY UCLASS_BOOTSTD
10
11 #include <common.h>
12 #include <bootdev.h>
13 #include <bootflow.h>
14 #include <bootmeth.h>
15 #include <command.h>
16 #include <dm.h>
17
18 /**
19  * struct efi_mgr_priv - private info for the efi-mgr driver
20  *
21  * @fake_bootflow: Fake a valid bootflow for testing
22  */
23 struct efi_mgr_priv {
24         bool fake_dev;
25 };
26
27 void sandbox_set_fake_efi_mgr_dev(struct udevice *dev, bool fake_dev)
28 {
29         struct efi_mgr_priv *priv = dev_get_priv(dev);
30
31         priv->fake_dev = fake_dev;
32 }
33
34 static int efi_mgr_check(struct udevice *dev, struct bootflow_iter *iter)
35 {
36         int ret;
37
38         /* Must be an bootstd device */
39         ret = bootflow_iter_uses_system(iter);
40         if (ret)
41                 return log_msg_ret("net", ret);
42
43         return 0;
44 }
45
46 static int efi_mgr_read_bootflow(struct udevice *dev, struct bootflow *bflow)
47 {
48         struct efi_mgr_priv *priv = dev_get_priv(dev);
49
50         if (priv->fake_dev) {
51                 bflow->state = BOOTFLOWST_READY;
52                 return 0;
53         }
54
55         /* To be implemented */
56
57         return -EINVAL;
58 }
59
60 static int efi_mgr_read_file(struct udevice *dev, struct bootflow *bflow,
61                                 const char *file_path, ulong addr, ulong *sizep)
62 {
63         /* Files are loaded by the 'bootefi bootmgr' command */
64
65         return -ENOSYS;
66 }
67
68 static int efi_mgr_boot(struct udevice *dev, struct bootflow *bflow)
69 {
70         int ret;
71
72         /* Booting is handled by the 'bootefi bootmgr' command */
73         ret = run_command("bootefi bootmgr", 0);
74
75         return 0;
76 }
77
78 static int bootmeth_efi_mgr_bind(struct udevice *dev)
79 {
80         struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);
81
82         plat->desc = "EFI bootmgr flow";
83         plat->flags = BOOTMETHF_GLOBAL;
84
85         return 0;
86 }
87
88 static struct bootmeth_ops efi_mgr_bootmeth_ops = {
89         .check          = efi_mgr_check,
90         .read_bootflow  = efi_mgr_read_bootflow,
91         .read_file      = efi_mgr_read_file,
92         .boot           = efi_mgr_boot,
93 };
94
95 static const struct udevice_id efi_mgr_bootmeth_ids[] = {
96         { .compatible = "u-boot,efi-bootmgr" },
97         { }
98 };
99
100 U_BOOT_DRIVER(bootmeth_efi_mgr) = {
101         .name           = "bootmeth_efi_mgr",
102         .id             = UCLASS_BOOTMETH,
103         .of_match       = efi_mgr_bootmeth_ids,
104         .ops            = &efi_mgr_bootmeth_ops,
105         .bind           = bootmeth_efi_mgr_bind,
106         .priv_auto      = sizeof(struct efi_mgr_priv),
107 };