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_MANUFACTOR,
  21         USB_G_STR_PRODUCT,
  22         USB_G_STR_SERIAL,
  23         USB_G_STR_CONFIG,
  24         USB_G_STR_INT_UAS,
  25         USB_G_STR_INT_BBB,
  26 };
  27
  28 #define USB_G_ALT_INT_BBB       0
  29 #define USB_G_ALT_INT_UAS       1
  30
  31 struct usbg_nacl {
  32         /* Binary World Wide unique Port Name for SAS Initiator port */
  33         u64 iport_wwpn;
  34         /* ASCII formatted WWPN for Sas Initiator port */
  35         char iport_name[USBG_NAMELEN];
  36         /* Returned by usbg_make_nodeacl() */
  37         struct se_node_acl se_node_acl;
  38 };
  39
  40 struct tcm_usbg_nexus {
  41         struct se_session *tvn_se_sess;
  42 };
  43
  44 struct usbg_tpg {
  45         struct mutex tpg_mutex;
  46         /* SAS port target portal group tag for TCM */
  47         u16 tport_tpgt;
  48         /* Pointer back to usbg_tport */
  49         struct usbg_tport *tport;
  50         struct workqueue_struct *workqueue;
  51         /* Returned by usbg_make_tpg() */
  52         struct se_portal_group se_tpg;
  53         u32 gadget_connect;
  54         struct tcm_usbg_nexus *tpg_nexus;
  55         atomic_t tpg_port_count;
  56 };
  57
  58 struct usbg_tport {
  59         /* SCSI protocol the tport is providing */
  60         u8 tport_proto_id;
  61         /* Binary World Wide unique Port Name for SAS Target port */
  62         u64 tport_wwpn;
  63         /* ASCII formatted WWPN for SAS Target port */
  64         char tport_name[USBG_NAMELEN];
  65         /* Returned by usbg_make_tport() */
  66         struct se_wwn tport_wwn;
  67 };
  68
  69 enum uas_state {
  70         UASP_SEND_DATA,
  71         UASP_RECEIVE_DATA,
  72         UASP_SEND_STATUS,
  73         UASP_QUEUE_COMMAND,
  74 };
  75
  76 #define USBG_MAX_CMD    64
  77 struct usbg_cmd {
  78         /* common */
  79         u8 cmd_buf[USBG_MAX_CMD];
  80         u32 data_len;
  81         struct work_struct work;
  82         int unpacked_lun;
  83         struct se_cmd se_cmd;
  84         void *data_buf; /* used if no sg support available */
  85         struct f_uas *fu;
  86         struct completion write_complete;
  87         struct kref ref;
  88
  89         /* UAS only */
  90         u16 tag;
  91         u16 prio_attr;
  92         struct sense_iu sense_iu;
  93         enum uas_state state;
  94         struct uas_stream *stream;
  95
  96         /* BOT only */
  97         __le32 bot_tag;
  98         unsigned int csw_code;
  99         unsigned is_read:1;
 100
 101 };
 102
 103 struct uas_stream {
 104         struct usb_request      *req_in;
 105         struct usb_request      *req_out;
 106         struct usb_request      *req_status;
 107 };
 108
 109 struct usbg_cdb {
 110         struct usb_request      *req;
 111         void                    *buf;
 112 };
 113
 114 struct bot_status {
 115         struct usb_request      *req;
 116         struct bulk_cs_wrap     csw;
 117 };
 118
 119 struct f_uas {
 120         struct usbg_tpg         *tpg;
 121         struct usb_function     function;
 122         u16                     iface;
 123
 124         u32                     flags;
 125 #define USBG_ENABLED            (1 << 0)
 126 #define USBG_IS_UAS             (1 << 1)
 127 #define USBG_USE_STREAMS        (1 << 2)
 128 #define USBG_IS_BOT             (1 << 3)
 129 #define USBG_BOT_CMD_PEND       (1 << 4)
 130
 131         struct usbg_cdb         cmd;
 132         struct usb_ep           *ep_in;
 133         struct usb_ep           *ep_out;
 134
 135         /* UAS */
 136         struct usb_ep           *ep_status;
 137         struct usb_ep           *ep_cmd;
 138         struct uas_stream       stream[UASP_SS_EP_COMP_NUM_STREAMS];
 139
 140         /* BOT */
 141         struct bot_status       bot_status;
 142         struct usb_request      *bot_req_in;
 143         struct usb_request      *bot_req_out;
 144 };
 145
 146 extern struct usbg_tpg *the_only_tpg_I_currently_have;
 147
 148 #endif