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