2 * Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
6 * Linux driver for Brocade Fibre Channel Host Bus Adapter.
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
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.
18 #ifndef __BFA_FCPIM_H__
19 #define __BFA_FCPIM_H__
24 #include "bfa_defs_svc.h"
28 #define BFA_ITNIM_MIN 32
29 #define BFA_ITNIM_MAX 1024
31 #define BFA_IOIM_MIN 8
32 #define BFA_IOIM_MAX 2000
34 #define BFA_TSKIM_MIN 4
35 #define BFA_TSKIM_MAX 512
36 #define BFA_FCPIM_PATHTOV_DEF (30 * 1000) /* in millisecs */
37 #define BFA_FCPIM_PATHTOV_MAX (90 * 1000) /* in millisecs */
40 #define bfa_itnim_ioprofile_update(__itnim, __index) \
41 (__itnim->ioprofile.iocomps[__index]++)
43 #define BFA_IOIM_RETRY_TAG_OFFSET 11
44 #define BFA_IOIM_RETRY_TAG_MASK 0x07ff /* 2K IOs */
45 #define BFA_IOIM_RETRY_MAX 7
47 /* Buckets are are 512 bytes to 2MB */
49 bfa_ioim_get_index(u32 n) {
52 return BFA_IOBUCKET_MAX - 1;
65 return (n == 0) ? (0) : pos;
69 * forward declarations
76 typedef void (*bfa_fcpim_profile_t) (struct bfa_ioim_s *ioim);
78 struct bfa_fcpim_mod_s {
80 struct bfa_itnim_s *itnim_arr;
81 struct bfa_ioim_s *ioim_arr;
82 struct bfa_ioim_sp_s *ioim_sp_arr;
83 struct bfa_tskim_s *tskim_arr;
84 struct bfa_dma_s snsbase;
90 u8 reqq; /* Request queue to be used */
92 struct list_head itnim_q; /* queue of active itnim */
93 struct list_head ioim_free_q; /* free IO resources */
94 struct list_head ioim_resfree_q; /* IOs waiting for f/w */
95 struct list_head ioim_comp_q; /* IO global comp Q */
96 struct list_head tskim_free_q;
97 u32 ios_active; /* current active IOs */
99 struct bfa_fcpim_del_itn_stats_s del_itn_stats;
100 bfa_boolean_t ioredirect;
101 bfa_boolean_t io_profile;
102 u32 io_profile_start_time;
103 bfa_fcpim_profile_t profile_comp;
104 bfa_fcpim_profile_t profile_start;
108 * BFA IO (initiator mode)
111 struct list_head qe; /* queue elememt */
112 bfa_sm_t sm; /* BFA ioim state machine */
113 struct bfa_s *bfa; /* BFA module */
114 struct bfa_fcpim_mod_s *fcpim; /* parent fcpim module */
115 struct bfa_itnim_s *itnim; /* i-t-n nexus for this IO */
116 struct bfad_ioim_s *dio; /* driver IO handle */
117 u16 iotag; /* FWI IO tag */
118 u16 abort_tag; /* unqiue abort request tag */
119 u16 nsges; /* number of SG elements */
120 u16 nsgpgs; /* number of SG pages */
121 struct bfa_sgpg_s *sgpg; /* first SG page */
122 struct list_head sgpg_q; /* allocated SG pages */
123 struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */
124 bfa_cb_cbfn_t io_cbfn; /* IO completion handler */
125 struct bfa_ioim_sp_s *iosp; /* slow-path IO handling */
126 u8 reqq; /* Request queue for I/O */
127 u64 start_time; /* IO's Profile start val */
131 struct bfa_ioim_sp_s {
132 struct bfi_msg_s comp_rspmsg; /* IO comp f/w response */
133 u8 *snsinfo; /* sense info for this IO */
134 struct bfa_sgpg_wqe_s sgpg_wqe; /* waitq elem for sgpg */
135 struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */
136 bfa_boolean_t abort_explicit; /* aborted by OS */
137 struct bfa_tskim_s *tskim; /* Relevant TM cmd */
141 * BFA Task management command (initiator mode)
146 struct bfa_s *bfa; /* BFA module */
147 struct bfa_fcpim_mod_s *fcpim; /* parent fcpim module */
148 struct bfa_itnim_s *itnim; /* i-t-n nexus for this IO */
149 struct bfad_tskim_s *dtsk; /* driver task mgmt cmnd */
150 bfa_boolean_t notify; /* notify itnim on TM comp */
151 lun_t lun; /* lun if applicable */
152 enum fcp_tm_cmnd tm_cmnd; /* task management command */
153 u16 tsk_tag; /* FWI IO tag */
154 u8 tsecs; /* timeout in seconds */
155 struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */
156 struct list_head io_q; /* queue of affected IOs */
157 struct bfa_wc_s wc; /* waiting counter */
158 struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */
159 enum bfi_tskim_status tsk_status; /* TM status */
164 * BFA i-t-n (initiator mode)
167 struct list_head qe; /* queue element */
168 bfa_sm_t sm; /* i-t-n im BFA state machine */
169 struct bfa_s *bfa; /* bfa instance */
170 struct bfa_rport_s *rport; /* bfa rport */
171 void *ditn; /* driver i-t-n structure */
172 struct bfi_mhdr_s mhdr; /* pre-built mhdr */
173 u8 msg_no; /* itnim/rport firmware handle */
174 u8 reqq; /* CQ for requests */
175 struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */
176 struct list_head pending_q; /* queue of pending IO requests */
177 struct list_head io_q; /* queue of active IO requests */
178 struct list_head io_cleanup_q; /* IO being cleaned up */
179 struct list_head tsk_q; /* queue of active TM commands */
180 struct list_head delay_comp_q; /* queue of failed inflight cmds */
181 bfa_boolean_t seq_rec; /* SQER supported */
182 bfa_boolean_t is_online; /* itnim is ONLINE for IO */
183 bfa_boolean_t iotov_active; /* IO TOV timer is active */
184 struct bfa_wc_s wc; /* waiting counter */
185 struct bfa_timer_s timer; /* pending IO TOV */
186 struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */
187 struct bfa_fcpim_mod_s *fcpim; /* fcpim module */
188 struct bfa_itnim_iostats_s stats;
189 struct bfa_itnim_ioprofile_s ioprofile;
193 #define bfa_itnim_is_online(_itnim) ((_itnim)->is_online)
194 #define BFA_FCPIM_MOD(_hal) (&(_hal)->modules.fcpim_mod)
195 #define BFA_IOIM_FROM_TAG(_fcpim, _iotag) \
196 (&fcpim->ioim_arr[(_iotag & BFA_IOIM_RETRY_TAG_MASK)])
197 #define BFA_TSKIM_FROM_TAG(_fcpim, _tmtag) \
198 (&fcpim->tskim_arr[_tmtag & (fcpim->num_tskim_reqs - 1)])
200 #define bfa_io_profile_start_time(_bfa) \
201 (_bfa->modules.fcpim_mod.io_profile_start_time)
202 #define bfa_fcpim_get_io_profile(_bfa) \
203 (_bfa->modules.fcpim_mod.io_profile)
205 static inline bfa_boolean_t
206 bfa_ioim_get_iotag(struct bfa_ioim_s *ioim)
210 k >>= BFA_IOIM_RETRY_TAG_OFFSET; k++;
212 if (k > BFA_IOIM_RETRY_MAX)
214 ioim->iotag &= BFA_IOIM_RETRY_TAG_MASK;
215 ioim->iotag |= k<<BFA_IOIM_RETRY_TAG_OFFSET;
219 * function prototypes
221 void bfa_ioim_attach(struct bfa_fcpim_mod_s *fcpim,
222 struct bfa_meminfo_s *minfo);
223 void bfa_ioim_detach(struct bfa_fcpim_mod_s *fcpim);
224 void bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
225 void bfa_ioim_good_comp_isr(struct bfa_s *bfa,
226 struct bfi_msg_s *msg);
227 void bfa_ioim_cleanup(struct bfa_ioim_s *ioim);
228 void bfa_ioim_cleanup_tm(struct bfa_ioim_s *ioim,
229 struct bfa_tskim_s *tskim);
230 void bfa_ioim_iocdisable(struct bfa_ioim_s *ioim);
231 void bfa_ioim_tov(struct bfa_ioim_s *ioim);
233 void bfa_tskim_attach(struct bfa_fcpim_mod_s *fcpim,
234 struct bfa_meminfo_s *minfo);
235 void bfa_tskim_detach(struct bfa_fcpim_mod_s *fcpim);
236 void bfa_tskim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
237 void bfa_tskim_iodone(struct bfa_tskim_s *tskim);
238 void bfa_tskim_iocdisable(struct bfa_tskim_s *tskim);
239 void bfa_tskim_cleanup(struct bfa_tskim_s *tskim);
241 void bfa_itnim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len,
243 void bfa_itnim_attach(struct bfa_fcpim_mod_s *fcpim,
244 struct bfa_meminfo_s *minfo);
245 void bfa_itnim_detach(struct bfa_fcpim_mod_s *fcpim);
246 void bfa_itnim_iocdisable(struct bfa_itnim_s *itnim);
247 void bfa_itnim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
248 void bfa_itnim_iodone(struct bfa_itnim_s *itnim);
249 void bfa_itnim_tskdone(struct bfa_itnim_s *itnim);
250 bfa_boolean_t bfa_itnim_hold_io(struct bfa_itnim_s *itnim);
251 void bfa_ioim_profile_comp(struct bfa_ioim_s *ioim);
252 void bfa_ioim_profile_start(struct bfa_ioim_s *ioim);
256 * bfa fcpim module API functions
258 void bfa_fcpim_path_tov_set(struct bfa_s *bfa, u16 path_tov);
259 u16 bfa_fcpim_path_tov_get(struct bfa_s *bfa);
260 void bfa_fcpim_qdepth_set(struct bfa_s *bfa, u16 q_depth);
261 u16 bfa_fcpim_qdepth_get(struct bfa_s *bfa);
262 bfa_status_t bfa_fcpim_get_modstats(struct bfa_s *bfa,
263 struct bfa_itnim_iostats_s *modstats);
264 bfa_status_t bfa_fcpim_port_iostats(struct bfa_s *bfa,
265 struct bfa_itnim_iostats_s *stats, u8 lp_tag);
266 bfa_status_t bfa_fcpim_get_del_itn_stats(struct bfa_s *bfa,
267 struct bfa_fcpim_del_itn_stats_s *modstats);
268 bfa_status_t bfa_fcpim_port_clear_iostats(struct bfa_s *bfa, u8 lp_tag);
269 void bfa_fcpim_add_stats(struct bfa_itnim_iostats_s *fcpim_stats,
270 struct bfa_itnim_iostats_s *itnim_stats);
271 bfa_status_t bfa_fcpim_clr_modstats(struct bfa_s *bfa);
272 void bfa_fcpim_set_ioredirect(struct bfa_s *bfa,
273 bfa_boolean_t state);
274 void bfa_fcpim_update_ioredirect(struct bfa_s *bfa);
275 bfa_status_t bfa_fcpim_profile_on(struct bfa_s *bfa, u32 time);
276 bfa_status_t bfa_fcpim_profile_off(struct bfa_s *bfa);
277 #define bfa_fcpim_ioredirect_enabled(__bfa) \
278 (((struct bfa_fcpim_mod_s *)(BFA_FCPIM_MOD(__bfa)))->ioredirect)
280 #define bfa_fcpim_get_next_reqq(__bfa, __qid) \
282 struct bfa_fcpim_mod_s *__fcpim = BFA_FCPIM_MOD(__bfa); \
284 __fcpim->reqq &= (BFI_IOC_MAX_CQS - 1); \
285 *(__qid) = __fcpim->reqq; \
288 #define bfa_iocfc_map_msg_to_qid(__msg, __qid) \
289 *(__qid) = (u8)((__msg) & (BFI_IOC_MAX_CQS - 1));
291 * bfa itnim API functions
293 struct bfa_itnim_s *bfa_itnim_create(struct bfa_s *bfa,
294 struct bfa_rport_s *rport, void *itnim);
295 void bfa_itnim_delete(struct bfa_itnim_s *itnim);
296 void bfa_itnim_online(struct bfa_itnim_s *itnim,
297 bfa_boolean_t seq_rec);
298 void bfa_itnim_offline(struct bfa_itnim_s *itnim);
299 void bfa_itnim_get_stats(struct bfa_itnim_s *itnim,
300 struct bfa_itnim_iostats_s *stats);
301 void bfa_itnim_clear_stats(struct bfa_itnim_s *itnim);
302 bfa_status_t bfa_itnim_get_ioprofile(struct bfa_itnim_s *itnim,
303 struct bfa_itnim_ioprofile_s *ioprofile);
304 #define bfa_itnim_get_reqq(__ioim) (((struct bfa_ioim_s *)__ioim)->itnim->reqq)
307 * BFA completion callback for bfa_itnim_online().
309 * @param[in] itnim FCS or driver itnim instance
313 void bfa_cb_itnim_online(void *itnim);
316 * BFA completion callback for bfa_itnim_offline().
318 * @param[in] itnim FCS or driver itnim instance
322 void bfa_cb_itnim_offline(void *itnim);
323 void bfa_cb_itnim_tov_begin(void *itnim);
324 void bfa_cb_itnim_tov(void *itnim);
327 * BFA notification to FCS/driver for second level error recovery.
329 * Atleast one I/O request has timedout and target is unresponsive to
330 * repeated abort requests. Second level error recovery should be initiated
331 * by starting implicit logout and recovery procedures.
333 * @param[in] itnim FCS or driver itnim instance
337 void bfa_cb_itnim_sler(void *itnim);
340 * bfa ioim API functions
342 struct bfa_ioim_s *bfa_ioim_alloc(struct bfa_s *bfa,
343 struct bfad_ioim_s *dio,
344 struct bfa_itnim_s *itnim,
347 void bfa_ioim_free(struct bfa_ioim_s *ioim);
348 void bfa_ioim_start(struct bfa_ioim_s *ioim);
349 bfa_status_t bfa_ioim_abort(struct bfa_ioim_s *ioim);
350 void bfa_ioim_delayed_comp(struct bfa_ioim_s *ioim,
351 bfa_boolean_t iotov);
355 * I/O completion notification.
357 * @param[in] dio driver IO structure
358 * @param[in] io_status IO completion status
359 * @param[in] scsi_status SCSI status returned by target
360 * @param[in] sns_len SCSI sense length, 0 if none
361 * @param[in] sns_info SCSI sense data, if any
362 * @param[in] residue Residual length
366 void bfa_cb_ioim_done(void *bfad, struct bfad_ioim_s *dio,
367 enum bfi_ioim_status io_status,
368 u8 scsi_status, int sns_len,
369 u8 *sns_info, s32 residue);
372 * I/O good completion notification.
374 * @param[in] dio driver IO structure
378 void bfa_cb_ioim_good_comp(void *bfad, struct bfad_ioim_s *dio);
381 * I/O abort completion notification
383 * @param[in] dio driver IO that was aborted
387 void bfa_cb_ioim_abort(void *bfad, struct bfad_ioim_s *dio);
390 * bfa tskim API functions
392 struct bfa_tskim_s *bfa_tskim_alloc(struct bfa_s *bfa,
393 struct bfad_tskim_s *dtsk);
394 void bfa_tskim_free(struct bfa_tskim_s *tskim);
395 void bfa_tskim_start(struct bfa_tskim_s *tskim,
396 struct bfa_itnim_s *itnim, lun_t lun,
397 enum fcp_tm_cmnd tm, u8 t_secs);
398 void bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
399 enum bfi_tskim_status tsk_status);
401 #endif /* __BFA_FCPIM_H__ */