drivers/usb/gadget/tcm_usb_gadget.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 <scsi/scsi.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_CONFIG = USB_GADGET_FIRST_AVAIL_IDX,
  21         USB_G_STR_INT_UAS,
  22         USB_G_STR_INT_BBB,
  23 };
  24
  25 #define USB_G_ALT_INT_BBB       0
  26 #define USB_G_ALT_INT_UAS       1
  27
  28 struct usbg_nacl {
  29         /* Binary World Wide unique Port Name for SAS Initiator port */
  30         u64 iport_wwpn;
  31         /* ASCII formatted WWPN for Sas Initiator port */
  32         char iport_name[USBG_NAMELEN];
  33         /* Returned by usbg_make_nodeacl() */
  34         struct se_node_acl se_node_acl;
  35 };
  36
  37 struct tcm_usbg_nexus {
  38         struct se_session *tvn_se_sess;
  39 };
  40
  41 struct usbg_tpg {
  42         struct mutex tpg_mutex;
  43         /* SAS port target portal group tag for TCM */
  44         u16 tport_tpgt;
  45         /* Pointer back to usbg_tport */
  46         struct usbg_tport *tport;
  47         struct workqueue_struct *workqueue;
  48         /* Returned by usbg_make_tpg() */
  49         struct se_portal_group se_tpg;
  50         u32 gadget_connect;
  51         struct tcm_usbg_nexus *tpg_nexus;
  52         atomic_t tpg_port_count;
  53 };
  54
  55 struct usbg_tport {
  56         /* SCSI protocol the tport is providing */
  57         u8 tport_proto_id;
  58         /* Binary World Wide unique Port Name for SAS Target port */
  59         u64 tport_wwpn;
  60         /* ASCII formatted WWPN for SAS Target port */
  61         char tport_name[USBG_NAMELEN];
  62         /* Returned by usbg_make_tport() */
  63         struct se_wwn tport_wwn;
  64 };
  65
  66 enum uas_state {
  67         UASP_SEND_DATA,
  68         UASP_RECEIVE_DATA,
  69         UASP_SEND_STATUS,
  70         UASP_QUEUE_COMMAND,
  71 };
  72
  73 #define USBG_MAX_CMD    64
  74 struct usbg_cmd {
  75         /* common */
  76         u8 cmd_buf[USBG_MAX_CMD];
  77         u32 data_len;
  78         struct work_struct work;
  79         int unpacked_lun;
  80         struct se_cmd se_cmd;
  81         void *data_buf; /* used if no sg support available */
  82         struct f_uas *fu;
  83         struct completion write_complete;
  84         struct kref ref;
  85
  86         /* UAS only */
  87         u16 tag;
  88         u16 prio_attr;
  89         struct sense_iu sense_iu;
  90         enum uas_state state;
  91         struct uas_stream *stream;
  92
  93         /* BOT only */
  94         __le32 bot_tag;
  95         unsigned int csw_code;
  96         unsigned is_read:1;
  97
  98 };
  99
 100 struct uas_stream {
 101         struct usb_request      *req_in;
 102         struct usb_request      *req_out;
 103         struct usb_request      *req_status;
 104 };
 105
 106 struct usbg_cdb {
 107         struct usb_request      *req;
 108         void                    *buf;
 109 };
 110
 111 struct bot_status {
 112         struct usb_request      *req;
 113         struct bulk_cs_wrap     csw;
 114 };
 115
 116 struct f_uas {
 117         struct usbg_tpg         *tpg;
 118         struct usb_function     function;
 119         u16                     iface;
 120
 121         u32                     flags;
 122 #define USBG_ENABLED            (1 << 0)
 123 #define USBG_IS_UAS             (1 << 1)
 124 #define USBG_USE_STREAMS        (1 << 2)
 125 #define USBG_IS_BOT             (1 << 3)
 126 #define USBG_BOT_CMD_PEND       (1 << 4)
 127
 128         struct usbg_cdb         cmd;
 129         struct usb_ep           *ep_in;
 130         struct usb_ep           *ep_out;
 131
 132         /* UAS */
 133         struct usb_ep           *ep_status;
 134         struct usb_ep           *ep_cmd;
 135         struct uas_stream       stream[UASP_SS_EP_COMP_NUM_STREAMS];
 136
 137         /* BOT */
 138         struct bot_status       bot_status;
 139         struct usb_request      *bot_req_in;
 140         struct usb_request      *bot_req_out;
 141 };
 142
 143 extern struct usbg_tpg *the_only_tpg_I_currently_have;
 144
 145 #endif