drivers/usb/gadget/function/tcm.h

   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__ */