LXR linux/drivers/scsi/snic/snic

   1/*
   2 * Copyright 2014 Cisco Systems, Inc.  All rights reserved.
   3 *
   4 * This program is free software; you may redistribute it and/or modify
   5 * it under the terms of the GNU General Public License as published by
   6 * the Free Software Foundation; version 2 of the License.
   7 *
   8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  15 * SOFTWARE.
  16 */
  17
  18#ifndef __SNIC_DISC_H
  19#define __SNIC_DISC_H
  20
  21#include "snic_fwint.h"
  22
  23enum snic_disc_state {
  24        SNIC_DISC_NONE,
  25        SNIC_DISC_INIT,
  26        SNIC_DISC_PENDING,
  27        SNIC_DISC_DONE
  28};
  29
  30struct snic;
  31struct snic_disc {
  32        struct list_head tgt_list;
  33        enum snic_disc_state state;
  34        struct mutex mutex;
  35        u16     disc_id;
  36        u8      req_cnt;
  37        u32     nxt_tgt_id;
  38        u32     rtgt_cnt;
  39        u8      *rtgt_info;
  40        struct delayed_work disc_timeout;
  41        void (*cb)(struct snic *);
  42};
  43
  44#define SNIC_TGT_NAM_LEN        16
  45
  46enum snic_tgt_state {
  47        SNIC_TGT_STAT_NONE,
  48        SNIC_TGT_STAT_INIT,
  49        SNIC_TGT_STAT_ONLINE,   /* Target is Online */
  50        SNIC_TGT_STAT_OFFLINE,  /* Target is Offline */
  51        SNIC_TGT_STAT_DEL,
  52};
  53
  54struct snic_tgt_priv {
  55        struct list_head list;
  56        enum snic_tgt_type typ;
  57        u16 disc_id;
  58        char *name[SNIC_TGT_NAM_LEN];
  59
  60        union {
  61                /*DAS Target specific info */
  62                /*SAN Target specific info */
  63                u8 dummmy;
  64        } u;
  65};
  66
  67/* snic tgt flags */
  68#define SNIC_TGT_SCAN_PENDING   0x01
  69
  70struct snic_tgt {
  71        struct list_head list;
  72        u16     id;
  73        u16     channel;
  74        u32     flags;
  75        u32     scsi_tgt_id;
  76        enum snic_tgt_state state;
  77        struct device dev;
  78        struct work_struct scan_work;
  79        struct work_struct del_work;
  80        struct snic_tgt_priv tdata;
  81};
  82
  83
  84struct snic_fw_req;
  85
  86void snic_disc_init(struct snic_disc *);
  87int snic_disc_start(struct snic *);
  88void snic_disc_term(struct snic *);
  89int snic_report_tgt_cmpl_handler(struct snic *, struct snic_fw_req *);
  90int snic_tgtinfo_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq);
  91void snic_process_report_tgts_rsp(struct work_struct *);
  92void snic_handle_tgt_disc(struct work_struct *);
  93void snic_handle_disc(struct work_struct *);
  94void snic_tgt_dev_release(struct device *);
  95void snic_tgt_del_all(struct snic *);
  96
  97#define dev_to_tgt(d) \
  98        container_of(d, struct snic_tgt, dev)
  99
 100static inline int
 101is_snic_target(struct device *dev)
 102{
 103        return dev->release == snic_tgt_dev_release;
 104}
 105
 106#define starget_to_tgt(st)      \
 107        (is_snic_target(((struct scsi_target *) st)->dev.parent) ? \
 108                dev_to_tgt(st->dev.parent) : NULL)
 109
 110#define snic_tgt_to_shost(t)    \
 111        dev_to_shost(t->dev.parent)
 112
 113static inline int
 114snic_tgt_chkready(struct snic_tgt *tgt)
 115{
 116        if (tgt->state == SNIC_TGT_STAT_ONLINE)
 117                return 0;
 118        else
 119                return DID_NO_CONNECT << 16;
 120}
 121
 122const char *snic_tgt_state_to_str(int);
 123int snic_tgt_scsi_abort_io(struct snic_tgt *);
 124#endif /* end of  __SNIC_DISC_H */
 125