drivers/usb/gadget/function/tcm.h

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