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
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
|
// Code for handling usb attached scsi devices.
//
// only usb 2.0 for now.
//
// once we have xhci driver with usb 3.0 support this must
// be updated to use usb3 streams so booting from usb3
// devices actually works.
//
// Authors:
// Gerd Hoffmann <kraxel@redhat.com>
//
// based on usb-msc.c which is written by:
// Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU LGPLv3 license.
#include "biosvar.h" // GET_GLOBALFLAT
#include "block.h" // DTYPE_USB
#include "blockcmd.h" // cdb_read
#include "config.h" // CONFIG_USB_UAS
#include "malloc.h" // free
#include "output.h" // dprintf
#include "std/disk.h" // DISK_RET_SUCCESS
#include "string.h" // memset
#include "usb.h" // struct usb_s
#include "usb-uas.h" // usb_uas_init
#include "util.h" // bootprio_find_usb
#define UAS_UI_COMMAND 0x01
#define UAS_UI_SENSE 0x03
#define UAS_UI_RESPONSE 0x04
#define UAS_UI_TASK_MGMT 0x05
#define UAS_UI_READ_READY 0x06
#define UAS_UI_WRITE_READY 0x07
#define UAS_PIPE_ID_COMMAND 0x01
#define UAS_PIPE_ID_STATUS 0x02
#define UAS_PIPE_ID_DATA_IN 0x03
#define UAS_PIPE_ID_DATA_OUT 0x04
typedef struct {
u8 id;
u8 reserved;
u16 tag;
} PACKED uas_ui_header;
typedef struct {
u8 prio_taskattr; /* 6:3 priority, 2:0 task attribute */
u8 reserved_1;
u8 add_cdb_length; /* 7:2 additional adb length (dwords) */
u8 reserved_2;
u8 lun[8];
u8 cdb[16];
u8 add_cdb[];
} PACKED uas_ui_command;
typedef struct {
u16 status_qualifier;
u8 status;
u8 reserved[7];
u16 sense_length;
u8 sense_data[18];
} PACKED uas_ui_sense;
typedef struct {
u16 add_response_info;
u8 response_code;
} PACKED uas_ui_response;
typedef struct {
u8 function;
u8 reserved;
u16 task_tag;
u8 lun[8];
} PACKED uas_ui_task_mgmt;
typedef struct {
uas_ui_header hdr;
union {
uas_ui_command command;
uas_ui_sense sense;
uas_ui_task_mgmt task;
uas_ui_response response;
};
} PACKED uas_ui;
struct uasdrive_s {
struct drive_s drive;
struct usb_pipe *command, *status, *data_in, *data_out;
int lun;
};
int
uas_process_op(struct disk_op_s *op)
{
if (!CONFIG_USB_UAS)
return DISK_RET_EBADTRACK;
struct uasdrive_s *drive_gf = container_of(
op->drive_gf, struct uasdrive_s, drive);
uas_ui ui;
memset(&ui, 0, sizeof(ui));
ui.hdr.id = UAS_UI_COMMAND;
ui.hdr.tag = 0xdead;
ui.command.lun[1] = GET_GLOBALFLAT(drive_gf->lun);
int blocksize = scsi_fill_cmd(op, ui.command.cdb, sizeof(ui.command.cdb));
if (blocksize < 0)
return default_process_op(op);
int ret = usb_send_bulk(GET_GLOBALFLAT(drive_gf->command),
USB_DIR_OUT, MAKE_FLATPTR(GET_SEG(SS), &ui),
sizeof(ui.hdr) + sizeof(ui.command));
if (ret) {
dprintf(1, "uas: command send fail");
goto fail;
}
memset(&ui, 0xff, sizeof(ui));
ret = usb_send_bulk(GET_GLOBALFLAT(drive_gf->status),
USB_DIR_IN, MAKE_FLATPTR(GET_SEG(SS), &ui), sizeof(ui));
if (ret) {
dprintf(1, "uas: status recv fail");
goto fail;
}
switch (ui.hdr.id) {
case UAS_UI_SENSE:
goto have_sense;
case UAS_UI_READ_READY:
ret = usb_send_bulk(GET_GLOBALFLAT(drive_gf->data_in),
USB_DIR_IN, op->buf_fl, op->count * blocksize);
if (ret) {
dprintf(1, "uas: data read fail");
goto fail;
}
break;
case UAS_UI_WRITE_READY:
ret = usb_send_bulk(GET_GLOBALFLAT(drive_gf->data_out),
USB_DIR_OUT, op->buf_fl, op->count * blocksize);
if (ret) {
dprintf(1, "uas: data write fail");
goto fail;
}
break;
default:
dprintf(1, "uas: unknown status ui id %d", ui.hdr.id);
goto fail;
}
memset(&ui, 0xff, sizeof(ui));
ret = usb_send_bulk(GET_GLOBALFLAT(drive_gf->status),
USB_DIR_IN, MAKE_FLATPTR(GET_SEG(SS), &ui), sizeof(ui));
if (ret) {
dprintf(1, "uas: status recv fail");
goto fail;
}
if (ui.hdr.id != UAS_UI_SENSE) {
dprintf(1, "uas: expected sense ui, got ui id %d", ui.hdr.id);
goto fail;
}
have_sense:
if (ui.sense.status == 0) {
return DISK_RET_SUCCESS;
}
fail:
return DISK_RET_EBADTRACK;
}
static int
uas_lun_setup(struct usbdevice_s *usbdev,
struct usb_pipe *command, struct usb_pipe *status,
struct usb_pipe *data_in, struct usb_pipe *data_out,
int lun)
{
// Allocate drive structure.
struct uasdrive_s *drive = malloc_fseg(sizeof(*drive));
if (!drive) {
warn_noalloc();
return -1;
}
memset(drive, 0, sizeof(*drive));
if (usb_32bit_pipe(data_in))
drive->drive.type = DTYPE_UAS_32;
else
drive->drive.type = DTYPE_UAS;
drive->command = command;
drive->status = status;
drive->data_in = data_in;
drive->data_out = data_out;
drive->lun = lun;
int prio = bootprio_find_usb(usbdev, lun);
int ret = scsi_drive_setup(&drive->drive, "USB UAS", prio);
if (ret) {
free(drive);
return -1;
}
return 0;
}
int
usb_uas_setup(struct usbdevice_s *usbdev)
{
if (!CONFIG_USB_UAS)
return -1;
// Verify right kind of device
struct usb_interface_descriptor *iface = usbdev->iface;
if (iface->bInterfaceSubClass != US_SC_SCSI ||
iface->bInterfaceProtocol != US_PR_UAS) {
dprintf(1, "Unsupported UAS device (subclass=%02x proto=%02x)\n"
, iface->bInterfaceSubClass, iface->bInterfaceProtocol);
return -1;
}
/* find & allocate pipes */
struct usb_endpoint_descriptor *ep = NULL;
struct usb_pipe *command = NULL;
struct usb_pipe *status = NULL;
struct usb_pipe *data_in = NULL;
struct usb_pipe *data_out = NULL;
u8 *desc = (u8*)iface;
while (desc) {
desc += desc[0];
switch (desc[1]) {
case USB_DT_ENDPOINT:
ep = (void*)desc;
break;
case USB_DT_ENDPOINT_COMPANION:
/* No support (yet) for usb3 streams */
dprintf(1, "Superspeed UAS devices not supported (yet)\n");
goto fail;
case 0x24:
switch (desc[2]) {
case UAS_PIPE_ID_COMMAND:
command = usb_alloc_pipe(usbdev, ep);
break;
case UAS_PIPE_ID_STATUS:
status = usb_alloc_pipe(usbdev, ep);
break;
case UAS_PIPE_ID_DATA_IN:
data_in = usb_alloc_pipe(usbdev, ep);
break;
case UAS_PIPE_ID_DATA_OUT:
data_out = usb_alloc_pipe(usbdev, ep);
break;
default:
goto fail;
}
break;
default:
desc = NULL;
break;
}
}
if (!command || !status || !data_in || !data_out)
goto fail;
/* TODO: send REPORT LUNS. For now, only LUN 0 is recognized. */
int ret = uas_lun_setup(usbdev, command, status, data_in, data_out, 0);
if (ret < 0) {
dprintf(1, "Unable to configure UAS drive.\n");
goto fail;
}
return 0;
fail:
usb_free_pipe(usbdev, command);
usb_free_pipe(usbdev, status);
usb_free_pipe(usbdev, data_in);
usb_free_pipe(usbdev, data_out);
return -1;
}
|
