1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
/*
* EFI device path interface
*
* Copyright (c) 2017 Heinrich Schuchardt
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <efi_loader.h>
#define MAC_OUTPUT_LEN 22
#define UNKNOWN_OUTPUT_LEN 23
const efi_guid_t efi_guid_device_path_to_text_protocol =
EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID;
static char *dp_unknown(char *s, struct efi_device_path *dp)
{
s += sprintf(s, "/UNKNOWN(%04x,%04x)", dp->type, dp->sub_type);
return s;
}
static char *dp_hardware(char *s, struct efi_device_path *dp)
{
switch (dp->sub_type) {
case DEVICE_PATH_SUB_TYPE_VENDOR: {
struct efi_device_path_vendor *vdp =
(struct efi_device_path_vendor *)dp;
s += sprintf(s, "/VenHw(%pUl)", &vdp->guid);
break;
}
default:
s = dp_unknown(s, dp);
break;
}
return s;
}
static char *dp_acpi(char *s, struct efi_device_path *dp)
{
switch (dp->sub_type) {
case DEVICE_PATH_SUB_TYPE_ACPI_DEVICE: {
struct efi_device_path_acpi_path *adp =
(struct efi_device_path_acpi_path *)dp;
s += sprintf(s, "/Acpi(PNP%04x", EISA_PNP_NUM(adp->hid));
if (adp->uid)
s += sprintf(s, ",%d", adp->uid);
s += sprintf(s, ")");
break;
}
default:
s = dp_unknown(s, dp);
break;
}
return s;
}
static char *dp_msging(char *s, struct efi_device_path *dp)
{
switch (dp->sub_type) {
case DEVICE_PATH_SUB_TYPE_MSG_USB: {
struct efi_device_path_usb *udp =
(struct efi_device_path_usb *)dp;
s += sprintf(s, "/Usb(0x%x,0x%x)", udp->parent_port_number,
udp->usb_interface);
break;
}
case DEVICE_PATH_SUB_TYPE_MSG_MAC_ADDR: {
struct efi_device_path_mac_addr *mdp =
(struct efi_device_path_mac_addr *)dp;
if (mdp->if_type != 0 && mdp->if_type != 1)
break;
s += sprintf(s, "/MAC(%02x%02x%02x%02x%02x%02x,0x%1x)",
mdp->mac.addr[0], mdp->mac.addr[1],
mdp->mac.addr[2], mdp->mac.addr[3],
mdp->mac.addr[4], mdp->mac.addr[5],
mdp->if_type);
break;
}
case DEVICE_PATH_SUB_TYPE_MSG_USB_CLASS: {
struct efi_device_path_usb_class *ucdp =
(struct efi_device_path_usb_class *)dp;
s += sprintf(s, "/USBClass(%x,%x,%x,%x,%x)",
ucdp->vendor_id, ucdp->product_id,
ucdp->device_class, ucdp->device_subclass,
ucdp->device_protocol);
break;
}
case DEVICE_PATH_SUB_TYPE_MSG_SD:
case DEVICE_PATH_SUB_TYPE_MSG_MMC: {
const char *typename =
(dp->sub_type == DEVICE_PATH_SUB_TYPE_MSG_SD) ?
"SDCard" : "MMC";
struct efi_device_path_sd_mmc_path *sddp =
(struct efi_device_path_sd_mmc_path *)dp;
s += sprintf(s, "/%s(Slot%u)", typename, sddp->slot_number);
break;
}
default:
s = dp_unknown(s, dp);
break;
}
return s;
}
static char *dp_media(char *s, struct efi_device_path *dp)
{
switch (dp->sub_type) {
case DEVICE_PATH_SUB_TYPE_HARD_DRIVE_PATH: {
struct efi_device_path_hard_drive_path *hddp =
(struct efi_device_path_hard_drive_path *)dp;
void *sig = hddp->partition_signature;
switch (hddp->signature_type) {
case SIG_TYPE_MBR:
s += sprintf(s, "/HD(Part%d,Sig%08x)",
hddp->partition_number,
*(uint32_t *)sig);
break;
case SIG_TYPE_GUID:
s += sprintf(s, "/HD(Part%d,Sig%pUl)",
hddp->partition_number, sig);
default:
s += sprintf(s, "/HD(Part%d,MBRType=%02x,SigType=%02x)",
hddp->partition_number, hddp->partmap_type,
hddp->signature_type);
}
break;
}
case DEVICE_PATH_SUB_TYPE_CDROM_PATH: {
struct efi_device_path_cdrom_path *cddp =
(struct efi_device_path_cdrom_path *)dp;
s += sprintf(s, "/CDROM(0x%x)", cddp->boot_entry);
break;
}
case DEVICE_PATH_SUB_TYPE_FILE_PATH: {
struct efi_device_path_file_path *fp =
(struct efi_device_path_file_path *)dp;
int slen = (dp->length - sizeof(*dp)) / 2;
s += sprintf(s, "/%-*ls", slen, fp->str);
break;
}
default:
s = dp_unknown(s, dp);
break;
}
return s;
}
static uint16_t *efi_convert_device_node_to_text(
struct efi_device_path *dp,
bool display_only,
bool allow_shortcuts)
{
unsigned long len;
efi_status_t r;
char buf[512]; /* this ought be be big enough for worst case */
char *str = buf;
uint16_t *out;
while (dp) {
switch (dp->type) {
case DEVICE_PATH_TYPE_HARDWARE_DEVICE:
str = dp_hardware(str, dp);
break;
case DEVICE_PATH_TYPE_ACPI_DEVICE:
str = dp_acpi(str, dp);
break;
case DEVICE_PATH_TYPE_MESSAGING_DEVICE:
str = dp_msging(str, dp);
break;
case DEVICE_PATH_TYPE_MEDIA_DEVICE:
str = dp_media(str, dp);
break;
default:
str = dp_unknown(str, dp);
}
dp = efi_dp_next(dp);
}
*str++ = '\0';
len = str - buf;
r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, 2 * len, (void **)&out);
if (r != EFI_SUCCESS)
return NULL;
ascii2unicode(out, buf);
out[len - 1] = 0;
return out;
}
/* helper for debug prints.. efi_free_pool() the result. */
uint16_t *efi_dp_str(struct efi_device_path *dp)
{
return efi_convert_device_node_to_text(dp, true, true);
}
static uint16_t EFIAPI *efi_convert_device_node_to_text_ext(
struct efi_device_path *device_node,
bool display_only,
bool allow_shortcuts)
{
uint16_t *buffer;
EFI_ENTRY("%p, %d, %d", device_node, display_only, allow_shortcuts);
buffer = efi_convert_device_node_to_text(device_node, display_only,
allow_shortcuts);
EFI_EXIT(EFI_SUCCESS);
return buffer;
}
static uint16_t EFIAPI *efi_convert_device_path_to_text(
struct efi_device_path *device_path,
bool display_only,
bool allow_shortcuts)
{
uint16_t *buffer;
EFI_ENTRY("%p, %d, %d", device_path, display_only, allow_shortcuts);
/*
* Our device paths are all of depth one. So its is sufficient to
* to convert the first node.
*/
buffer = efi_convert_device_node_to_text(device_path, display_only,
allow_shortcuts);
EFI_EXIT(EFI_SUCCESS);
return buffer;
}
const struct efi_device_path_to_text_protocol efi_device_path_to_text = {
.convert_device_node_to_text = efi_convert_device_node_to_text_ext,
.convert_device_path_to_text = efi_convert_device_path_to_text,
};
|
