LXR linux/drivers/usb/gadget/tcm_usb

   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
  19enum {
  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
  28struct 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
  37struct tcm_usbg_nexus {
  38        struct se_session *tvn_se_sess;
  39};
  40
  41struct 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
  55struct 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
  66enum 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
  74struct 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
 100struct uas_stream {
 101        struct usb_request      *req_in;
 102        struct usb_request      *req_out;
 103        struct usb_request      *req_status;
 104};
 105
 106struct usbg_cdb {
 107        struct usb_request      *req;
 108        void                    *buf;
 109};
 110
 111struct bot_status {
 112        struct usb_request      *req;
 113        struct bulk_cs_wrap     csw;
 114};
 115
 116struct 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
 143extern struct usbg_tpg *the_only_tpg_I_currently_have;
 144
 145#endif
 146