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__ */