drivers/scsi/bfa/bfad_im.h

   1 /*
   2  * Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
   3  * All rights reserved
   4  * www.brocade.com
   5  *
   6  * Linux driver for Brocade Fibre Channel Host Bus Adapter.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License (GPL) Version 2 as
  10  * published by the Free Software Foundation
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  */
  17
  18 #ifndef __BFAD_IM_H__
  19 #define __BFAD_IM_H__
  20
  21 #include "bfa_fcs.h"
  22
  23 #define FCPI_NAME " fcpim"
  24
  25 #ifndef KOBJ_NAME_LEN
  26 #define KOBJ_NAME_LEN           20
  27 #endif
  28
  29 bfa_status_t bfad_im_module_init(void);
  30 void bfad_im_module_exit(void);
  31 bfa_status_t bfad_im_probe(struct bfad_s *bfad);
  32 void bfad_im_probe_undo(struct bfad_s *bfad);
  33 bfa_status_t bfad_im_port_new(struct bfad_s *bfad, struct bfad_port_s *port);
  34 void bfad_im_port_delete(struct bfad_s *bfad, struct bfad_port_s *port);
  35 void bfad_im_port_clean(struct bfad_im_port_s *im_port);
  36 int  bfad_im_scsi_host_alloc(struct bfad_s *bfad,
  37                 struct bfad_im_port_s *im_port, struct device *dev);
  38 void bfad_im_scsi_host_free(struct bfad_s *bfad,
  39                                 struct bfad_im_port_s *im_port);
  40
  41 #define MAX_FCP_TARGET 1024
  42 #define MAX_FCP_LUN 16384
  43 #define BFAD_TARGET_RESET_TMO 60
  44 #define BFAD_LUN_RESET_TMO 60
  45 #define ScsiResult(host_code, scsi_code) (((host_code) << 16) | scsi_code)
  46 #define BFA_QUEUE_FULL_RAMP_UP_TIME 120
  47
  48 /*
  49  * itnim flags
  50  */
  51 #define IO_DONE_BIT                     0
  52
  53 struct bfad_itnim_data_s {
  54         struct bfad_itnim_s *itnim;
  55 };
  56
  57 struct bfad_im_port_s {
  58         struct bfad_s         *bfad;
  59         struct bfad_port_s    *port;
  60         struct work_struct port_delete_work;
  61         int             idr_id;
  62         u16        cur_scsi_id;
  63         u16     flags;
  64         struct list_head binding_list;
  65         struct Scsi_Host *shost;
  66         struct list_head itnim_mapped_list;
  67         struct fc_vport *fc_vport;
  68 };
  69
  70 enum bfad_itnim_state {
  71         ITNIM_STATE_NONE,
  72         ITNIM_STATE_ONLINE,
  73         ITNIM_STATE_OFFLINE_PENDING,
  74         ITNIM_STATE_OFFLINE,
  75         ITNIM_STATE_TIMEOUT,
  76         ITNIM_STATE_FREE,
  77 };
  78
  79 /*
  80  * Per itnim data structure
  81  */
  82 struct bfad_itnim_s {
  83         struct list_head list_entry;
  84         struct bfa_fcs_itnim_s fcs_itnim;
  85         struct work_struct itnim_work;
  86         u32        flags;
  87         enum bfad_itnim_state state;
  88         struct bfad_im_s *im;
  89         struct bfad_im_port_s *im_port;
  90         struct bfad_rport_s *drv_rport;
  91         struct fc_rport *fc_rport;
  92         struct bfa_itnim_s *bfa_itnim;
  93         u16        scsi_tgt_id;
  94         u16        channel;
  95         u16        queue_work;
  96         unsigned long   last_ramp_up_time;
  97         unsigned long   last_queue_full_time;
  98 };
  99
 100 enum bfad_binding_type {
 101         FCP_PWWN_BINDING = 0x1,
 102         FCP_NWWN_BINDING = 0x2,
 103         FCP_FCID_BINDING = 0x3,
 104 };
 105
 106 struct bfad_fcp_binding {
 107         struct list_head list_entry;
 108         enum bfad_binding_type binding_type;
 109         u16        scsi_target_id;
 110         u32        fc_id;
 111         wwn_t           nwwn;
 112         wwn_t           pwwn;
 113 };
 114
 115 struct bfad_im_s {
 116         struct bfad_s         *bfad;
 117         struct workqueue_struct *drv_workq;
 118         char            drv_workq_name[KOBJ_NAME_LEN];
 119         struct work_struct      aen_im_notify_work;
 120 };
 121
 122 #define bfad_get_aen_entry(_drv, _entry) do {                           \
 123         unsigned long   _flags;                                         \
 124         spin_lock_irqsave(&(_drv)->bfad_aen_spinlock, _flags);          \
 125         bfa_q_deq(&(_drv)->free_aen_q, &(_entry));                      \
 126         if (_entry)                                                     \
 127                 list_add_tail(&(_entry)->qe, &(_drv)->active_aen_q);    \
 128         spin_unlock_irqrestore(&(_drv)->bfad_aen_spinlock, _flags);     \
 129 } while (0)
 130
 131 /* post fc_host vendor event */
 132 #define bfad_im_post_vendor_event(_entry, _drv, _cnt, _cat, _evt) do {        \
 133         do_gettimeofday(&(_entry)->aen_tv);                                   \
 134         (_entry)->bfad_num = (_drv)->inst_no;                                 \
 135         (_entry)->seq_num = (_cnt);                                           \
 136         (_entry)->aen_category = (_cat);                                      \
 137         (_entry)->aen_type = (_evt);                                          \
 138         if ((_drv)->bfad_flags & BFAD_FC4_PROBE_DONE)                         \
 139                 queue_work((_drv)->im->drv_workq,                             \
 140                            &(_drv)->im->aen_im_notify_work);                  \
 141 } while (0)
 142
 143 struct Scsi_Host *bfad_scsi_host_alloc(struct bfad_im_port_s *im_port,
 144                                 struct bfad_s *);
 145 bfa_status_t bfad_thread_workq(struct bfad_s *bfad);
 146 void bfad_destroy_workq(struct bfad_im_s *im);
 147 void bfad_fc_host_init(struct bfad_im_port_s *im_port);
 148 void bfad_scsi_host_free(struct bfad_s *bfad,
 149                                  struct bfad_im_port_s *im_port);
 150 void bfad_ramp_up_qdepth(struct bfad_itnim_s *itnim,
 151                                  struct scsi_device *sdev);
 152 void bfad_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev);
 153 struct bfad_itnim_s *bfad_get_itnim(struct bfad_im_port_s *im_port, int id);
 154
 155 extern struct scsi_host_template bfad_im_scsi_host_template;
 156 extern struct scsi_host_template bfad_im_vport_template;
 157 extern struct fc_function_template bfad_im_fc_function_template;
 158 extern struct fc_function_template bfad_im_vport_fc_function_template;
 159 extern struct scsi_transport_template *bfad_im_scsi_transport_template;
 160 extern struct scsi_transport_template *bfad_im_scsi_vport_transport_template;
 161
 162 extern struct device_attribute *bfad_im_host_attrs[];
 163 extern struct device_attribute *bfad_im_vport_attrs[];
 164
 165 irqreturn_t bfad_intx(int irq, void *dev_id);
 166
 167 int bfad_im_bsg_request(struct fc_bsg_job *job);
 168 int bfad_im_bsg_timeout(struct fc_bsg_job *job);
 169
 170 /*
 171  * Macro to set the SCSI device sdev_bflags - sdev_bflags are used by the
 172  * SCSI mid-layer to choose LUN Scanning mode REPORT_LUNS vs. Sequential Scan
 173  *
 174  * Internally iterate's over all the ITNIM's part of the im_port & set's the
 175  * sdev_bflags for the scsi_device associated with LUN #0.
 176  */
 177 #define bfad_reset_sdev_bflags(__im_port, __lunmask_cfg) do {           \
 178         struct scsi_device *__sdev = NULL;                              \
 179         struct bfad_itnim_s *__itnim = NULL;                            \
 180         u32 scan_flags = BLIST_NOREPORTLUN | BLIST_SPARSELUN;           \
 181         list_for_each_entry(__itnim, &((__im_port)->itnim_mapped_list), \
 182                             list_entry) {                               \
 183                 __sdev = scsi_device_lookup((__im_port)->shost,         \
 184                                             __itnim->channel,           \
 185                                             __itnim->scsi_tgt_id, 0);   \
 186                 if (__sdev) {                                           \
 187                         if ((__lunmask_cfg) == BFA_TRUE)                \
 188                                 __sdev->sdev_bflags |= scan_flags;      \
 189                         else                                            \
 190                                 __sdev->sdev_bflags &= ~scan_flags;     \
 191                         scsi_device_put(__sdev);                        \
 192                 }                                                       \
 193         }                                                               \
 194 } while (0)
 195
 196 #endif