xref: /openbmc/linux/drivers/usb/gadget/function/tcm.h (revision b2441318)
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 
19 enum {
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 
29 struct tcm_usbg_nexus {
30 	struct se_session *tvn_se_sess;
31 };
32 
33 struct 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 
49 struct 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 
58 enum 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
66 struct 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 
92 struct uas_stream {
93 	struct usb_request	*req_in;
94 	struct usb_request	*req_out;
95 	struct usb_request	*req_status;
96 };
97 
98 struct usbg_cdb {
99 	struct usb_request	*req;
100 	void			*buf;
101 };
102 
103 struct bot_status {
104 	struct usb_request	*req;
105 	struct bulk_cs_wrap	csw;
106 };
107 
108 struct 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