1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __TARGET_USB_GADGET_H__
3#define __TARGET_USB_GADGET_H__
4
5#include <linux/kref.h>
6/* #include <linux/usb/uas.h> */
7#include <linux/usb/composite.h>
8#include <linux/usb/uas.h>
9#include <linux/usb/storage.h>
10#include <target/target_core_base.h>
11#include <target/target_core_fabric.h>
12
13#define USBG_NAMELEN 32
14
15#define fuas_to_gadget(f) (f->function.config->cdev->gadget)
16#define UASP_SS_EP_COMP_LOG_STREAMS 4
17#define UASP_SS_EP_COMP_NUM_STREAMS (1 << UASP_SS_EP_COMP_LOG_STREAMS)
18
19enum {
20 USB_G_STR_INT_UAS = 0,
21 USB_G_STR_INT_BBB,
22};
23
24#define USB_G_ALT_INT_BBB 0
25#define USB_G_ALT_INT_UAS 1
26
27#define USB_G_DEFAULT_SESSION_TAGS 128
28
29struct tcm_usbg_nexus {
30 struct se_session *tvn_se_sess;
31};
32
33struct usbg_tpg {
34 struct mutex tpg_mutex;
35 /* SAS port target portal group tag for TCM */
36 u16 tport_tpgt;
37 /* Pointer back to usbg_tport */
38 struct usbg_tport *tport;
39 struct workqueue_struct *workqueue;
40 /* Returned by usbg_make_tpg() */
41 struct se_portal_group se_tpg;
42 u32 gadget_connect;
43 struct tcm_usbg_nexus *tpg_nexus;
44 atomic_t tpg_port_count;
45
46 struct usb_function_instance *fi;
47};
48
49struct usbg_tport {
50 /* Binary World Wide unique Port Name for SAS Target port */
51 u64 tport_wwpn;
52 /* ASCII formatted WWPN for SAS Target port */
53 char tport_name[USBG_NAMELEN];
54 /* Returned by usbg_make_tport() */
55 struct se_wwn tport_wwn;
56};
57
58enum uas_state {
59 UASP_SEND_DATA,
60 UASP_RECEIVE_DATA,
61 UASP_SEND_STATUS,
62 UASP_QUEUE_COMMAND,
63};
64
65#define USBG_MAX_CMD 64
66struct usbg_cmd {
67 /* common */
68 u8 cmd_buf[USBG_MAX_CMD];
69 u32 data_len;
70 struct work_struct work;
71 int unpacked_lun;
72 struct se_cmd se_cmd;
73 void *data_buf; /* used if no sg support available */
74 struct f_uas *fu;
75 struct completion write_complete;
76 struct kref ref;
77
78 /* UAS only */
79 u16 tag;
80 u16 prio_attr;
81 struct sense_iu sense_iu;
82 enum uas_state state;
83 struct uas_stream *stream;
84
85 /* BOT only */
86 __le32 bot_tag;
87 unsigned int csw_code;
88 unsigned is_read:1;
89
90};
91
92struct uas_stream {
93 struct usb_request *req_in;
94 struct usb_request *req_out;
95 struct usb_request *req_status;
96};
97
98struct usbg_cdb {
99 struct usb_request *req;
100 void *buf;
101};
102
103struct bot_status {
104 struct usb_request *req;
105 struct bulk_cs_wrap csw;
106};
107
108struct f_uas {
109 struct usbg_tpg *tpg;
110 struct usb_function function;
111 u16 iface;
112
113 u32 flags;
114#define USBG_ENABLED (1 << 0)
115#define USBG_IS_UAS (1 << 1)
116#define USBG_USE_STREAMS (1 << 2)
117#define USBG_IS_BOT (1 << 3)
118#define USBG_BOT_CMD_PEND (1 << 4)
119
120 struct usbg_cdb cmd;
121 struct usb_ep *ep_in;
122 struct usb_ep *ep_out;
123
124 /* UAS */
125 struct usb_ep *ep_status;
126 struct usb_ep *ep_cmd;
127 struct uas_stream stream[UASP_SS_EP_COMP_NUM_STREAMS];
128
129 /* BOT */
130 struct bot_status bot_status;
131 struct usb_request *bot_req_in;
132 struct usb_request *bot_req_out;
133};
134
135#endif /* __TARGET_USB_GADGET_H__ */
136

source code of linux/drivers/usb/gadget/function/tcm.h