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bfad_im.h
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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 u32 bfad_im_supported_speeds(struct bfa_s *bfa);
41 
42 #define MAX_FCP_TARGET 1024
43 #define MAX_FCP_LUN 16384
44 #define BFAD_TARGET_RESET_TMO 60
45 #define BFAD_LUN_RESET_TMO 60
46 #define ScsiResult(host_code, scsi_code) (((host_code) << 16) | scsi_code)
47 #define BFA_QUEUE_FULL_RAMP_UP_TIME 120
48 
49 /*
50  * itnim flags
51  */
52 #define IO_DONE_BIT 0
53 
54 struct bfad_itnim_data_s {
55  struct bfad_itnim_s *itnim;
56 };
57 
58 struct bfad_im_port_s {
59  struct bfad_s *bfad;
60  struct bfad_port_s *port;
61  struct work_struct port_delete_work;
62  int idr_id;
63  u16 cur_scsi_id;
64  u16 flags;
65  struct list_head binding_list;
66  struct Scsi_Host *shost;
67  struct list_head itnim_mapped_list;
68  struct fc_vport *fc_vport;
69 };
70 
71 enum bfad_itnim_state {
72  ITNIM_STATE_NONE,
73  ITNIM_STATE_ONLINE,
74  ITNIM_STATE_OFFLINE_PENDING,
75  ITNIM_STATE_OFFLINE,
76  ITNIM_STATE_TIMEOUT,
77  ITNIM_STATE_FREE,
78 };
79 
80 /*
81  * Per itnim data structure
82  */
83 struct bfad_itnim_s {
84  struct list_head list_entry;
85  struct bfa_fcs_itnim_s fcs_itnim;
86  struct work_struct itnim_work;
87  u32 flags;
88  enum bfad_itnim_state state;
89  struct bfad_im_s *im;
90  struct bfad_im_port_s *im_port;
91  struct bfad_rport_s *drv_rport;
92  struct fc_rport *fc_rport;
93  struct bfa_itnim_s *bfa_itnim;
94  u16 scsi_tgt_id;
95  u16 channel;
96  u16 queue_work;
97  unsigned long last_ramp_up_time;
98  unsigned long last_queue_full_time;
99 };
100 
101 enum bfad_binding_type {
102  FCP_PWWN_BINDING = 0x1,
103  FCP_NWWN_BINDING = 0x2,
104  FCP_FCID_BINDING = 0x3,
105 };
106 
107 struct bfad_fcp_binding {
108  struct list_head list_entry;
109  enum bfad_binding_type binding_type;
110  u16 scsi_target_id;
111  u32 fc_id;
112  wwn_t nwwn;
113  wwn_t pwwn;
114 };
115 
116 struct bfad_im_s {
117  struct bfad_s *bfad;
118  struct workqueue_struct *drv_workq;
119  char drv_workq_name[KOBJ_NAME_LEN];
120  struct work_struct aen_im_notify_work;
121 };
122 
123 #define bfad_get_aen_entry(_drv, _entry) do { \
124  unsigned long _flags; \
125  spin_lock_irqsave(&(_drv)->bfad_aen_spinlock, _flags); \
126  bfa_q_deq(&(_drv)->free_aen_q, &(_entry)); \
127  if (_entry) \
128  list_add_tail(&(_entry)->qe, &(_drv)->active_aen_q); \
129  spin_unlock_irqrestore(&(_drv)->bfad_aen_spinlock, _flags); \
130 } while (0)
131 
132 /* post fc_host vendor event */
133 #define bfad_im_post_vendor_event(_entry, _drv, _cnt, _cat, _evt) do { \
134  do_gettimeofday(&(_entry)->aen_tv); \
135  (_entry)->bfad_num = (_drv)->inst_no; \
136  (_entry)->seq_num = (_cnt); \
137  (_entry)->aen_category = (_cat); \
138  (_entry)->aen_type = (_evt); \
139  if ((_drv)->bfad_flags & BFAD_FC4_PROBE_DONE) \
140  queue_work((_drv)->im->drv_workq, \
141  &(_drv)->im->aen_im_notify_work); \
142 } while (0)
143 
144 struct Scsi_Host *bfad_scsi_host_alloc(struct bfad_im_port_s *im_port,
145  struct bfad_s *);
146 bfa_status_t bfad_thread_workq(struct bfad_s *bfad);
147 void bfad_destroy_workq(struct bfad_im_s *im);
148 void bfad_fc_host_init(struct bfad_im_port_s *im_port);
149 void bfad_scsi_host_free(struct bfad_s *bfad,
150  struct bfad_im_port_s *im_port);
151 void bfad_ramp_up_qdepth(struct bfad_itnim_s *itnim,
152  struct scsi_device *sdev);
153 void bfad_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev);
154 struct bfad_itnim_s *bfad_get_itnim(struct bfad_im_port_s *im_port, int id);
155 
156 extern struct scsi_host_template bfad_im_scsi_host_template;
157 extern struct scsi_host_template bfad_im_vport_template;
158 extern struct fc_function_template bfad_im_fc_function_template;
159 extern struct fc_function_template bfad_im_vport_fc_function_template;
160 extern struct scsi_transport_template *bfad_im_scsi_transport_template;
161 extern struct scsi_transport_template *bfad_im_scsi_vport_transport_template;
162 
163 extern struct device_attribute *bfad_im_host_attrs[];
164 extern struct device_attribute *bfad_im_vport_attrs[];
165 
166 irqreturn_t bfad_intx(int irq, void *dev_id);
167 
168 int bfad_im_bsg_request(struct fc_bsg_job *job);
169 int bfad_im_bsg_timeout(struct fc_bsg_job *job);
170 
171 /*
172  * Macro to set the SCSI device sdev_bflags - sdev_bflags are used by the
173  * SCSI mid-layer to choose LUN Scanning mode REPORT_LUNS vs. Sequential Scan
174  *
175  * Internally iterate's over all the ITNIM's part of the im_port & set's the
176  * sdev_bflags for the scsi_device associated with LUN #0.
177  */
178 #define bfad_reset_sdev_bflags(__im_port, __lunmask_cfg) do { \
179  struct scsi_device *__sdev = NULL; \
180  struct bfad_itnim_s *__itnim = NULL; \
181  u32 scan_flags = BLIST_NOREPORTLUN | BLIST_SPARSELUN; \
182  list_for_each_entry(__itnim, &((__im_port)->itnim_mapped_list), \
183  list_entry) { \
184  __sdev = scsi_device_lookup((__im_port)->shost, \
185  __itnim->channel, \
186  __itnim->scsi_tgt_id, 0); \
187  if (__sdev) { \
188  if ((__lunmask_cfg) == BFA_TRUE) \
189  __sdev->sdev_bflags |= scan_flags; \
190  else \
191  __sdev->sdev_bflags &= ~scan_flags; \
192  scsi_device_put(__sdev); \
193  } \
194  } \
195 } while (0)
196 
197 #endif
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