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