blob: a9565a56b5a7e6ea745f29e543a3410b63182d16 (
plain)
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
|
#ifndef _NCM_H
#define _NCM_H
/** @file
*
* CDC-NCM USB Ethernet driver
*
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <stdint.h>
#include <ipxe/usb.h>
#include <ipxe/cdc.h>
#include <byteswap.h>
#include "ecm.h"
/** CDC-NCM subclass */
#define USB_SUBCLASS_CDC_NCM 0x0d
/** Get NTB parameters */
#define NCM_GET_NTB_PARAMETERS \
( USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE | \
USB_REQUEST_TYPE ( 0x80 ) )
/** NTB datagram parameters */
struct ncm_ntb_datagram_parameters {
/** Maximum size */
uint32_t mtu;
/** Alignment divisor */
uint16_t divisor;
/** Alignment remainder */
uint16_t remainder;
/** Alignment modulus */
uint16_t modulus;
} __attribute__ (( packed ));
/** NTB parameters */
struct ncm_ntb_parameters {
/** Length */
uint16_t len;
/** Supported formats */
uint16_t formats;
/** IN datagram parameters */
struct ncm_ntb_datagram_parameters in;
/** Reserved */
uint16_t reserved;
/** OUT datagram parameters */
struct ncm_ntb_datagram_parameters out;
/** Maximum number of datagrams per OUT NTB */
uint16_t max;
} __attribute__ (( packed ));
/** Set NTB input size */
#define NCM_SET_NTB_INPUT_SIZE \
( USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE | \
USB_REQUEST_TYPE ( 0x86 ) )
/** Set NTB input size */
struct ncm_set_ntb_input_size {
/** Maximum size */
uint32_t mtu;
} __attribute__ (( packed ));
/** Minimum allowed NTB input size */
#define NCM_MIN_NTB_INPUT_SIZE 2048
/** Maximum allowed NTB input size (16-bit) */
#define NCM_MAX_NTB_INPUT_SIZE 65536
/** CDC-NCM transfer header (16-bit) */
struct ncm_transfer_header {
/** Signature */
uint32_t magic;
/** Header length */
uint16_t header_len;
/** Sequence number */
uint16_t sequence;
/** Total length */
uint16_t len;
/** Offset of first datagram pointer */
uint16_t offset;
} __attribute__ (( packed ));
/** CDC-NCM transfer header magic */
#define NCM_TRANSFER_HEADER_MAGIC 0x484d434eUL
/** CDC-NCM datagram descriptor (16-bit) */
struct ncm_datagram_descriptor {
/** Starting offset */
uint16_t offset;
/** Length */
uint16_t len;
} __attribute__ (( packed ));
/** CDC-NCM datagram pointer (16-bit) */
struct ncm_datagram_pointer {
/** Signature */
uint32_t magic;
/** Header length */
uint16_t header_len;
/** Offset of next datagram pointer */
uint16_t offset;
/** Datagram descriptors
*
* Must be terminated by an empty descriptor.
*/
struct ncm_datagram_descriptor desc[0];
} __attribute__ (( packed ));
/** CDC-NCM datagram pointer magic */
#define NCM_DATAGRAM_POINTER_MAGIC 0x304d434eUL
/** CDC-NCM datagram pointer CRC present flag */
#define NCM_DATAGRAM_POINTER_MAGIC_CRC 0x01000000UL
/** NTB constructed for transmitted packets (excluding padding)
*
* This is a policy decision.
*/
struct ncm_ntb_header {
/** Transfer header */
struct ncm_transfer_header nth;
/** Datagram pointer */
struct ncm_datagram_pointer ndp;
/** Datagram descriptors */
struct ncm_datagram_descriptor desc[2];
} __attribute__ (( packed ));
/** A CDC-NCM network device */
struct ncm_device {
/** USB device */
struct usb_device *usb;
/** USB bus */
struct usb_bus *bus;
/** Network device */
struct net_device *netdev;
/** USB network device */
struct usbnet_device usbnet;
/** Maximum supported NTB input size */
size_t mtu;
/** Transmitted packet sequence number */
uint16_t sequence;
/** Alignment padding required on transmitted packets */
size_t padding;
};
/** Bulk IN ring minimum buffer count
*
* This is a policy decision.
*/
#define NCM_IN_MIN_COUNT 3
/** Bulk IN ring minimum total buffer size
*
* This is a policy decision.
*/
#define NCM_IN_MIN_SIZE 16384
/** Bulk IN ring maximum total buffer size
*
* This is a policy decision.
*/
#define NCM_IN_MAX_SIZE 131072
/** Interrupt ring buffer count
*
* This is a policy decision.
*/
#define NCM_INTR_COUNT 2
#endif /* _NCM_H */
|
