Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
[sfrench/cifs-2.6.git] / drivers / scsi / bfa / bfad_im.h
1 /*
2  * Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
3  * Copyright (c) 2014- QLogic Corporation.
4  * All rights reserved
5  * www.qlogic.com
6  *
7  * Linux driver for QLogic BR-series Fibre Channel Host Bus Adapter.
8  *
9  * This program is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU General Public License (GPL) Version 2 as
11  * published by the Free Software Foundation
12  *
13  * This program is distributed in the hope that it will be useful, but
14  * WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * General Public License for more details.
17  */
18
19 #ifndef __BFAD_IM_H__
20 #define __BFAD_IM_H__
21
22 #include "bfa_fcs.h"
23
24 #define FCPI_NAME " fcpim"
25
26 #ifndef KOBJ_NAME_LEN
27 #define KOBJ_NAME_LEN           20
28 #endif
29
30 bfa_status_t bfad_im_module_init(void);
31 void bfad_im_module_exit(void);
32 bfa_status_t bfad_im_probe(struct bfad_s *bfad);
33 void bfad_im_probe_undo(struct bfad_s *bfad);
34 bfa_status_t bfad_im_port_new(struct bfad_s *bfad, struct bfad_port_s *port);
35 void bfad_im_port_delete(struct bfad_s *bfad, struct bfad_port_s *port);
36 void bfad_im_port_clean(struct bfad_im_port_s *im_port);
37 int  bfad_im_scsi_host_alloc(struct bfad_s *bfad,
38                 struct bfad_im_port_s *im_port, struct device *dev);
39 void bfad_im_scsi_host_free(struct bfad_s *bfad,
40                                 struct bfad_im_port_s *im_port);
41 u32 bfad_im_supported_speeds(struct bfa_s *bfa);
42
43 #define MAX_FCP_TARGET 1024
44 #define MAX_FCP_LUN 16384
45 #define BFAD_TARGET_RESET_TMO 60
46 #define BFAD_LUN_RESET_TMO 60
47 #define ScsiResult(host_code, scsi_code) (((host_code) << 16) | scsi_code)
48 #define BFA_QUEUE_FULL_RAMP_UP_TIME 120
49
50 /*
51  * itnim flags
52  */
53 #define IO_DONE_BIT                     0
54
55 struct bfad_itnim_data_s {
56         struct bfad_itnim_s *itnim;
57 };
58
59 struct bfad_im_port_s {
60         struct bfad_s         *bfad;
61         struct bfad_port_s    *port;
62         struct work_struct port_delete_work;
63         int             idr_id;
64         u16        cur_scsi_id;
65         u16     flags;
66         struct list_head binding_list;
67         struct Scsi_Host *shost;
68         struct list_head itnim_mapped_list;
69         struct fc_vport *fc_vport;
70 };
71
72 struct bfad_im_port_pointer {
73         struct bfad_im_port_s *p;
74 };
75
76 static inline struct bfad_im_port_s *bfad_get_im_port(struct Scsi_Host *host)
77 {
78         struct bfad_im_port_pointer *im_portp = shost_priv(host);
79         return im_portp->p;
80 }
81
82 enum bfad_itnim_state {
83         ITNIM_STATE_NONE,
84         ITNIM_STATE_ONLINE,
85         ITNIM_STATE_OFFLINE_PENDING,
86         ITNIM_STATE_OFFLINE,
87         ITNIM_STATE_TIMEOUT,
88         ITNIM_STATE_FREE,
89 };
90
91 /*
92  * Per itnim data structure
93  */
94 struct bfad_itnim_s {
95         struct list_head list_entry;
96         struct bfa_fcs_itnim_s fcs_itnim;
97         struct work_struct itnim_work;
98         u32        flags;
99         enum bfad_itnim_state state;
100         struct bfad_im_s *im;
101         struct bfad_im_port_s *im_port;
102         struct bfad_rport_s *drv_rport;
103         struct fc_rport *fc_rport;
104         struct bfa_itnim_s *bfa_itnim;
105         u16        scsi_tgt_id;
106         u16        channel;
107         u16        queue_work;
108         unsigned long   last_ramp_up_time;
109         unsigned long   last_queue_full_time;
110 };
111
112 enum bfad_binding_type {
113         FCP_PWWN_BINDING = 0x1,
114         FCP_NWWN_BINDING = 0x2,
115         FCP_FCID_BINDING = 0x3,
116 };
117
118 struct bfad_fcp_binding {
119         struct list_head list_entry;
120         enum bfad_binding_type binding_type;
121         u16        scsi_target_id;
122         u32        fc_id;
123         wwn_t           nwwn;
124         wwn_t           pwwn;
125 };
126
127 struct bfad_im_s {
128         struct bfad_s         *bfad;
129         struct workqueue_struct *drv_workq;
130         char            drv_workq_name[KOBJ_NAME_LEN];
131         struct work_struct      aen_im_notify_work;
132 };
133
134 #define bfad_get_aen_entry(_drv, _entry) do {                           \
135         unsigned long   _flags;                                         \
136         spin_lock_irqsave(&(_drv)->bfad_aen_spinlock, _flags);          \
137         bfa_q_deq(&(_drv)->free_aen_q, &(_entry));                      \
138         if (_entry)                                                     \
139                 list_add_tail(&(_entry)->qe, &(_drv)->active_aen_q);    \
140         spin_unlock_irqrestore(&(_drv)->bfad_aen_spinlock, _flags);     \
141 } while (0)
142
143 /* post fc_host vendor event */
144 static inline void bfad_im_post_vendor_event(struct bfa_aen_entry_s *entry,
145                                              struct bfad_s *drv, int cnt,
146                                              enum bfa_aen_category cat,
147                                              enum bfa_ioc_aen_event evt)
148 {
149         struct timespec64 ts;
150
151         ktime_get_real_ts64(&ts);
152         /*
153          * 'unsigned long aen_tv_sec' overflows in y2106 on 32-bit
154          * architectures, or in 2038 if user space interprets it
155          * as 'signed'.
156          */
157         entry->aen_tv_sec = ts.tv_sec;
158         entry->aen_tv_usec = ts.tv_nsec / NSEC_PER_USEC;
159         entry->bfad_num = drv->inst_no;
160         entry->seq_num = cnt;
161         entry->aen_category = cat;
162         entry->aen_type = evt;
163         if (drv->bfad_flags & BFAD_FC4_PROBE_DONE)
164                 queue_work(drv->im->drv_workq, &drv->im->aen_im_notify_work);
165 }
166
167 struct Scsi_Host *bfad_scsi_host_alloc(struct bfad_im_port_s *im_port,
168                                 struct bfad_s *);
169 bfa_status_t bfad_thread_workq(struct bfad_s *bfad);
170 void bfad_destroy_workq(struct bfad_im_s *im);
171 void bfad_fc_host_init(struct bfad_im_port_s *im_port);
172 void bfad_scsi_host_free(struct bfad_s *bfad,
173                                  struct bfad_im_port_s *im_port);
174 void bfad_ramp_up_qdepth(struct bfad_itnim_s *itnim,
175                                  struct scsi_device *sdev);
176 void bfad_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev);
177 struct bfad_itnim_s *bfad_get_itnim(struct bfad_im_port_s *im_port, int id);
178
179 extern struct scsi_host_template bfad_im_scsi_host_template;
180 extern struct scsi_host_template bfad_im_vport_template;
181 extern struct fc_function_template bfad_im_fc_function_template;
182 extern struct fc_function_template bfad_im_vport_fc_function_template;
183 extern struct scsi_transport_template *bfad_im_scsi_transport_template;
184 extern struct scsi_transport_template *bfad_im_scsi_vport_transport_template;
185
186 extern struct device_attribute *bfad_im_host_attrs[];
187 extern struct device_attribute *bfad_im_vport_attrs[];
188
189 irqreturn_t bfad_intx(int irq, void *dev_id);
190
191 int bfad_im_bsg_request(struct bsg_job *job);
192 int bfad_im_bsg_timeout(struct bsg_job *job);
193
194 /*
195  * Macro to set the SCSI device sdev_bflags - sdev_bflags are used by the
196  * SCSI mid-layer to choose LUN Scanning mode REPORT_LUNS vs. Sequential Scan
197  *
198  * Internally iterate's over all the ITNIM's part of the im_port & set's the
199  * sdev_bflags for the scsi_device associated with LUN #0.
200  */
201 #define bfad_reset_sdev_bflags(__im_port, __lunmask_cfg) do {           \
202         struct scsi_device *__sdev = NULL;                              \
203         struct bfad_itnim_s *__itnim = NULL;                            \
204         u32 scan_flags = BLIST_NOREPORTLUN | BLIST_SPARSELUN;           \
205         list_for_each_entry(__itnim, &((__im_port)->itnim_mapped_list), \
206                             list_entry) {                               \
207                 __sdev = scsi_device_lookup((__im_port)->shost,         \
208                                             __itnim->channel,           \
209                                             __itnim->scsi_tgt_id, 0);   \
210                 if (__sdev) {                                           \
211                         if ((__lunmask_cfg) == BFA_TRUE)                \
212                                 __sdev->sdev_bflags |= scan_flags;      \
213                         else                                            \
214                                 __sdev->sdev_bflags &= ~scan_flags;     \
215                         scsi_device_put(__sdev);                        \
216                 }                                                       \
217         }                                                               \
218 } while (0)
219
220 #endif