xref: /openbmc/linux/drivers/scsi/bfa/bfad_im.h (revision 68198dca)
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 #define bfad_im_post_vendor_event(_entry, _drv, _cnt, _cat, _evt) do {	      \
145 	do_gettimeofday(&(_entry)->aen_tv);				      \
146 	(_entry)->bfad_num = (_drv)->inst_no;				      \
147 	(_entry)->seq_num = (_cnt);					      \
148 	(_entry)->aen_category = (_cat);				      \
149 	(_entry)->aen_type = (_evt);					      \
150 	if ((_drv)->bfad_flags & BFAD_FC4_PROBE_DONE)			      \
151 		queue_work((_drv)->im->drv_workq,			      \
152 			   &(_drv)->im->aen_im_notify_work);		      \
153 } while (0)
154 
155 struct Scsi_Host *bfad_scsi_host_alloc(struct bfad_im_port_s *im_port,
156 				struct bfad_s *);
157 bfa_status_t bfad_thread_workq(struct bfad_s *bfad);
158 void bfad_destroy_workq(struct bfad_im_s *im);
159 void bfad_fc_host_init(struct bfad_im_port_s *im_port);
160 void bfad_scsi_host_free(struct bfad_s *bfad,
161 				 struct bfad_im_port_s *im_port);
162 void bfad_ramp_up_qdepth(struct bfad_itnim_s *itnim,
163 				 struct scsi_device *sdev);
164 void bfad_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev);
165 struct bfad_itnim_s *bfad_get_itnim(struct bfad_im_port_s *im_port, int id);
166 
167 extern struct scsi_host_template bfad_im_scsi_host_template;
168 extern struct scsi_host_template bfad_im_vport_template;
169 extern struct fc_function_template bfad_im_fc_function_template;
170 extern struct fc_function_template bfad_im_vport_fc_function_template;
171 extern struct scsi_transport_template *bfad_im_scsi_transport_template;
172 extern struct scsi_transport_template *bfad_im_scsi_vport_transport_template;
173 
174 extern struct device_attribute *bfad_im_host_attrs[];
175 extern struct device_attribute *bfad_im_vport_attrs[];
176 
177 irqreturn_t bfad_intx(int irq, void *dev_id);
178 
179 int bfad_im_bsg_request(struct bsg_job *job);
180 int bfad_im_bsg_timeout(struct bsg_job *job);
181 
182 /*
183  * Macro to set the SCSI device sdev_bflags - sdev_bflags are used by the
184  * SCSI mid-layer to choose LUN Scanning mode REPORT_LUNS vs. Sequential Scan
185  *
186  * Internally iterate's over all the ITNIM's part of the im_port & set's the
187  * sdev_bflags for the scsi_device associated with LUN #0.
188  */
189 #define bfad_reset_sdev_bflags(__im_port, __lunmask_cfg) do {		\
190 	struct scsi_device *__sdev = NULL;				\
191 	struct bfad_itnim_s *__itnim = NULL;				\
192 	u32 scan_flags = BLIST_NOREPORTLUN | BLIST_SPARSELUN;		\
193 	list_for_each_entry(__itnim, &((__im_port)->itnim_mapped_list),	\
194 			    list_entry) {				\
195 		__sdev = scsi_device_lookup((__im_port)->shost,		\
196 					    __itnim->channel,		\
197 					    __itnim->scsi_tgt_id, 0);	\
198 		if (__sdev) {						\
199 			if ((__lunmask_cfg) == BFA_TRUE)		\
200 				__sdev->sdev_bflags |= scan_flags;	\
201 			else						\
202 				__sdev->sdev_bflags &= ~scan_flags;	\
203 			scsi_device_put(__sdev);			\
204 		}							\
205 	}								\
206 } while (0)
207 
208 #endif
209