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
|
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include "usb.h"
static int uas_is_interface(struct usb_host_interface *intf)
{
return (intf->desc.bInterfaceClass == USB_CLASS_MASS_STORAGE &&
intf->desc.bInterfaceSubClass == USB_SC_SCSI &&
intf->desc.bInterfaceProtocol == USB_PR_UAS);
}
static struct usb_host_interface *uas_find_uas_alt_setting(
struct usb_interface *intf)
{
int i;
for (i = 0; i < intf->num_altsetting; i++) {
struct usb_host_interface *alt = &intf->altsetting[i];
if (uas_is_interface(alt))
return alt;
}
return NULL;
}
static int uas_find_endpoints(struct usb_host_interface *alt,
struct usb_host_endpoint *eps[])
{
struct usb_host_endpoint *endpoint = alt->endpoint;
unsigned i, n_endpoints = alt->desc.bNumEndpoints;
for (i = 0; i < n_endpoints; i++) {
unsigned char *extra = endpoint[i].extra;
int len = endpoint[i].extralen;
while (len >= 3) {
if (extra[1] == USB_DT_PIPE_USAGE) {
unsigned pipe_id = extra[2];
if (pipe_id > 0 && pipe_id < 5)
eps[pipe_id - 1] = &endpoint[i];
break;
}
len -= extra[0];
extra += extra[0];
}
}
if (!eps[0] || !eps[1] || !eps[2] || !eps[3])
return -ENODEV;
return 0;
}
static int uas_use_uas_driver(struct usb_interface *intf,
const struct usb_device_id *id,
unsigned long *flags_ret)
{
struct usb_host_endpoint *eps[4] = { };
struct usb_device *udev = interface_to_usbdev(intf);
struct usb_hcd *hcd = bus_to_hcd(udev->bus);
unsigned long flags = id->driver_info;
struct usb_host_interface *alt;
int r;
alt = uas_find_uas_alt_setting(intf);
if (!alt)
return 0;
r = uas_find_endpoints(alt, eps);
if (r < 0)
return 0;
/*
* ASMedia has a number of usb3 to sata bridge chips, at the time of
* this writing the following versions exist:
* ASM1051 - no uas support version
* ASM1051 - with broken (*) uas support
* ASM1053 - with working uas support, but problems with large xfers
* ASM1153 - with working uas support
*
* Devices with these chips re-use a number of device-ids over the
* entire line, so the device-id is useless to determine if we're
* dealing with an ASM1051 (which we want to avoid).
*
* The ASM1153 can be identified by config.MaxPower == 0,
* where as the ASM105x models have config.MaxPower == 36.
*
* Differentiating between the ASM1053 and ASM1051 is trickier, when
* connected over USB-3 we can look at the number of streams supported,
* ASM1051 supports 32 streams, where as early ASM1053 versions support
* 16 streams, newer ASM1053-s also support 32 streams, but have a
* different prod-id.
*
* (*) ASM1051 chips do work with UAS with some disks (with the
* US_FL_NO_REPORT_OPCODES quirk), but are broken with other disks
*/
if (le16_to_cpu(udev->descriptor.idVendor) == 0x174c &&
(le16_to_cpu(udev->descriptor.idProduct) == 0x5106 ||
le16_to_cpu(udev->descriptor.idProduct) == 0x55aa)) {
if (udev->actconfig->desc.bMaxPower == 0) {
/* ASM1153, do nothing */
} else if (udev->speed < USB_SPEED_SUPER) {
/* No streams info, assume ASM1051 */
flags |= US_FL_IGNORE_UAS;
} else if (usb_ss_max_streams(&eps[1]->ss_ep_comp) == 32) {
/* Possibly an ASM1051, disable uas */
flags |= US_FL_IGNORE_UAS;
} else {
/* ASM1053, these have issues with large transfers */
flags |= US_FL_MAX_SECTORS_240;
}
}
/* All Seagate disk enclosures have broken ATA pass-through support */
if (le16_to_cpu(udev->descriptor.idVendor) == 0x0bc2)
flags |= US_FL_NO_ATA_1X;
/*
* RTL9210-based enclosure from HIKSEMI, MD202 reportedly have issues
* with UAS. This isn't distinguishable with just idVendor and
* idProduct, use manufacturer and product too.
*
* Reported-by: Hongling Zeng <zenghongling@kylinos.cn>
*/
if (le16_to_cpu(udev->descriptor.idVendor) == 0x0bda &&
le16_to_cpu(udev->descriptor.idProduct) == 0x9210 &&
(udev->manufacturer && !strcmp(udev->manufacturer, "HIKSEMI")) &&
(udev->product && !strcmp(udev->product, "MD202")))
flags |= US_FL_IGNORE_UAS;
usb_stor_adjust_quirks(udev, &flags);
if (flags & US_FL_IGNORE_UAS) {
dev_warn(&udev->dev,
"UAS is blacklisted for this device, using usb-storage instead\n");
return 0;
}
if (udev->bus->sg_tablesize == 0) {
dev_warn(&udev->dev,
"The driver for the USB controller %s does not support scatter-gather which is\n",
hcd->driver->description);
dev_warn(&udev->dev,
"required by the UAS driver. Please try an other USB controller if you wish to use UAS.\n");
return 0;
}
if (udev->speed >= USB_SPEED_SUPER && !hcd->can_do_streams) {
dev_warn(&udev->dev,
"USB controller %s does not support streams, which are required by the UAS driver.\n",
hcd_to_bus(hcd)->bus_name);
dev_warn(&udev->dev,
"Please try an other USB controller if you wish to use UAS.\n");
return 0;
}
if (flags_ret)
*flags_ret = flags;
return 1;
}
|
