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 __BFA_FCPIM_H__ 19 #define __BFA_FCPIM_H__ 20 21 #include "bfa.h" 22 #include "bfa_svc.h" 23 #include "bfi_ms.h" 24 #include "bfa_defs_svc.h" 25 #include "bfa_cs.h" 26 27 /* FCP module related definitions */ 28 #define BFA_IO_MAX BFI_IO_MAX 29 #define BFA_FWTIO_MAX 2000 30 31 struct bfa_fcp_mod_s; 32 struct bfa_iotag_s { 33 struct list_head qe; /* queue element */ 34 u16 tag; /* FW IO tag */ 35 }; 36 37 struct bfa_itn_s { 38 bfa_isr_func_t isr; 39 }; 40 41 void bfa_itn_create(struct bfa_s *bfa, struct bfa_rport_s *rport, 42 void (*isr)(struct bfa_s *bfa, struct bfi_msg_s *m)); 43 void bfa_itn_isr(struct bfa_s *bfa, struct bfi_msg_s *m); 44 void bfa_iotag_attach(struct bfa_fcp_mod_s *fcp); 45 void bfa_fcp_res_recfg(struct bfa_s *bfa, u16 num_ioim_fw); 46 47 #define BFA_FCP_MOD(_hal) (&(_hal)->modules.fcp_mod) 48 #define BFA_MEM_FCP_KVA(__bfa) (&(BFA_FCP_MOD(__bfa)->kva_seg)) 49 #define BFA_IOTAG_FROM_TAG(_fcp, _tag) \ 50 (&(_fcp)->iotag_arr[(_tag & BFA_IOIM_IOTAG_MASK)]) 51 #define BFA_ITN_FROM_TAG(_fcp, _tag) \ 52 ((_fcp)->itn_arr + ((_tag) & ((_fcp)->num_itns - 1))) 53 #define BFA_SNSINFO_FROM_TAG(_fcp, _tag) \ 54 bfa_mem_get_dmabuf_kva(_fcp, _tag, BFI_IOIM_SNSLEN) 55 56 #define BFA_ITNIM_MIN 32 57 #define BFA_ITNIM_MAX 1024 58 59 #define BFA_IOIM_MIN 8 60 #define BFA_IOIM_MAX 2000 61 62 #define BFA_TSKIM_MIN 4 63 #define BFA_TSKIM_MAX 512 64 #define BFA_FCPIM_PATHTOV_DEF (30 * 1000) /* in millisecs */ 65 #define BFA_FCPIM_PATHTOV_MAX (90 * 1000) /* in millisecs */ 66 67 68 #define bfa_itnim_ioprofile_update(__itnim, __index) \ 69 (__itnim->ioprofile.iocomps[__index]++) 70 71 #define BFA_IOIM_RETRY_TAG_OFFSET 11 72 #define BFA_IOIM_IOTAG_MASK 0x07ff /* 2K IOs */ 73 #define BFA_IOIM_RETRY_MAX 7 74 75 /* Buckets are are 512 bytes to 2MB */ 76 static inline u32 77 bfa_ioim_get_index(u32 n) { 78 int pos = 0; 79 if (n >= (1UL)<<22) 80 return BFA_IOBUCKET_MAX - 1; 81 n >>= 8; 82 if (n >= (1UL)<<16) { 83 n >>= 16; 84 pos += 16; 85 } 86 if (n >= 1 << 8) { 87 n >>= 8; 88 pos += 8; 89 } 90 if (n >= 1 << 4) { 91 n >>= 4; 92 pos += 4; 93 } 94 if (n >= 1 << 2) { 95 n >>= 2; 96 pos += 2; 97 } 98 if (n >= 1 << 1) 99 pos += 1; 100 101 return (n == 0) ? (0) : pos; 102 } 103 104 /* 105 * forward declarations 106 */ 107 struct bfa_ioim_s; 108 struct bfa_tskim_s; 109 struct bfad_ioim_s; 110 struct bfad_tskim_s; 111 112 typedef void (*bfa_fcpim_profile_t) (struct bfa_ioim_s *ioim); 113 typedef bfa_boolean_t (*bfa_ioim_lm_proc_rsp_data_t) (struct bfa_ioim_s *ioim); 114 115 struct bfa_fcpim_s { 116 struct bfa_s *bfa; 117 struct bfa_fcp_mod_s *fcp; 118 struct bfa_itnim_s *itnim_arr; 119 struct bfa_ioim_s *ioim_arr; 120 struct bfa_ioim_sp_s *ioim_sp_arr; 121 struct bfa_tskim_s *tskim_arr; 122 int num_itnims; 123 int num_tskim_reqs; 124 u32 path_tov; 125 u16 q_depth; 126 u8 reqq; /* Request queue to be used */ 127 u8 lun_masking_pending; 128 struct list_head itnim_q; /* queue of active itnim */ 129 struct list_head ioim_resfree_q; /* IOs waiting for f/w */ 130 struct list_head ioim_comp_q; /* IO global comp Q */ 131 struct list_head tskim_free_q; 132 struct list_head tskim_unused_q; /* Unused tskim Q */ 133 u32 ios_active; /* current active IOs */ 134 u32 delay_comp; 135 struct bfa_fcpim_del_itn_stats_s del_itn_stats; 136 bfa_boolean_t ioredirect; 137 bfa_boolean_t io_profile; 138 u32 io_profile_start_time; 139 bfa_fcpim_profile_t profile_comp; 140 bfa_fcpim_profile_t profile_start; 141 }; 142 143 /* Max FCP dma segs required */ 144 #define BFA_FCP_DMA_SEGS BFI_IOIM_SNSBUF_SEGS 145 146 struct bfa_fcp_mod_s { 147 struct bfa_s *bfa; 148 struct list_head iotag_ioim_free_q; /* free IO resources */ 149 struct list_head iotag_tio_free_q; /* free IO resources */ 150 struct list_head iotag_unused_q; /* unused IO resources*/ 151 struct bfa_iotag_s *iotag_arr; 152 struct bfa_itn_s *itn_arr; 153 int num_ioim_reqs; 154 int num_fwtio_reqs; 155 int num_itns; 156 struct bfa_dma_s snsbase[BFA_FCP_DMA_SEGS]; 157 struct bfa_fcpim_s fcpim; 158 struct bfa_mem_dma_s dma_seg[BFA_FCP_DMA_SEGS]; 159 struct bfa_mem_kva_s kva_seg; 160 }; 161 162 /* 163 * BFA IO (initiator mode) 164 */ 165 struct bfa_ioim_s { 166 struct list_head qe; /* queue elememt */ 167 bfa_sm_t sm; /* BFA ioim state machine */ 168 struct bfa_s *bfa; /* BFA module */ 169 struct bfa_fcpim_s *fcpim; /* parent fcpim module */ 170 struct bfa_itnim_s *itnim; /* i-t-n nexus for this IO */ 171 struct bfad_ioim_s *dio; /* driver IO handle */ 172 u16 iotag; /* FWI IO tag */ 173 u16 abort_tag; /* unqiue abort request tag */ 174 u16 nsges; /* number of SG elements */ 175 u16 nsgpgs; /* number of SG pages */ 176 struct bfa_sgpg_s *sgpg; /* first SG page */ 177 struct list_head sgpg_q; /* allocated SG pages */ 178 struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */ 179 bfa_cb_cbfn_t io_cbfn; /* IO completion handler */ 180 struct bfa_ioim_sp_s *iosp; /* slow-path IO handling */ 181 u8 reqq; /* Request queue for I/O */ 182 u8 mode; /* IO is passthrough or not */ 183 u64 start_time; /* IO's Profile start val */ 184 bfa_ioim_lm_proc_rsp_data_t proc_rsp_data; /* RSP data adjust */ 185 }; 186 187 struct bfa_ioim_sp_s { 188 struct bfi_msg_s comp_rspmsg; /* IO comp f/w response */ 189 struct bfa_sgpg_wqe_s sgpg_wqe; /* waitq elem for sgpg */ 190 struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */ 191 bfa_boolean_t abort_explicit; /* aborted by OS */ 192 struct bfa_tskim_s *tskim; /* Relevant TM cmd */ 193 }; 194 195 /* 196 * BFA Task management command (initiator mode) 197 */ 198 struct bfa_tskim_s { 199 struct list_head qe; 200 bfa_sm_t sm; 201 struct bfa_s *bfa; /* BFA module */ 202 struct bfa_fcpim_s *fcpim; /* parent fcpim module */ 203 struct bfa_itnim_s *itnim; /* i-t-n nexus for this IO */ 204 struct bfad_tskim_s *dtsk; /* driver task mgmt cmnd */ 205 bfa_boolean_t notify; /* notify itnim on TM comp */ 206 struct scsi_lun lun; /* lun if applicable */ 207 enum fcp_tm_cmnd tm_cmnd; /* task management command */ 208 u16 tsk_tag; /* FWI IO tag */ 209 u8 tsecs; /* timeout in seconds */ 210 struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */ 211 struct list_head io_q; /* queue of affected IOs */ 212 struct bfa_wc_s wc; /* waiting counter */ 213 struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */ 214 enum bfi_tskim_status tsk_status; /* TM status */ 215 }; 216 217 /* 218 * BFA i-t-n (initiator mode) 219 */ 220 struct bfa_itnim_s { 221 struct list_head qe; /* queue element */ 222 bfa_sm_t sm; /* i-t-n im BFA state machine */ 223 struct bfa_s *bfa; /* bfa instance */ 224 struct bfa_rport_s *rport; /* bfa rport */ 225 void *ditn; /* driver i-t-n structure */ 226 struct bfi_mhdr_s mhdr; /* pre-built mhdr */ 227 u8 msg_no; /* itnim/rport firmware handle */ 228 u8 reqq; /* CQ for requests */ 229 struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */ 230 struct list_head pending_q; /* queue of pending IO requests */ 231 struct list_head io_q; /* queue of active IO requests */ 232 struct list_head io_cleanup_q; /* IO being cleaned up */ 233 struct list_head tsk_q; /* queue of active TM commands */ 234 struct list_head delay_comp_q; /* queue of failed inflight cmds */ 235 bfa_boolean_t seq_rec; /* SQER supported */ 236 bfa_boolean_t is_online; /* itnim is ONLINE for IO */ 237 bfa_boolean_t iotov_active; /* IO TOV timer is active */ 238 struct bfa_wc_s wc; /* waiting counter */ 239 struct bfa_timer_s timer; /* pending IO TOV */ 240 struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */ 241 struct bfa_fcpim_s *fcpim; /* fcpim module */ 242 struct bfa_itnim_iostats_s stats; 243 struct bfa_itnim_ioprofile_s ioprofile; 244 }; 245 246 #define bfa_itnim_is_online(_itnim) ((_itnim)->is_online) 247 #define BFA_FCPIM(_hal) (&(_hal)->modules.fcp_mod.fcpim) 248 #define BFA_IOIM_TAG_2_ID(_iotag) ((_iotag) & BFA_IOIM_IOTAG_MASK) 249 #define BFA_IOIM_FROM_TAG(_fcpim, _iotag) \ 250 (&fcpim->ioim_arr[(_iotag & BFA_IOIM_IOTAG_MASK)]) 251 #define BFA_TSKIM_FROM_TAG(_fcpim, _tmtag) \ 252 (&fcpim->tskim_arr[_tmtag & (fcpim->num_tskim_reqs - 1)]) 253 254 #define bfa_io_profile_start_time(_bfa) \ 255 ((_bfa)->modules.fcp_mod.fcpim.io_profile_start_time) 256 #define bfa_fcpim_get_io_profile(_bfa) \ 257 ((_bfa)->modules.fcp_mod.fcpim.io_profile) 258 #define bfa_ioim_update_iotag(__ioim) do { \ 259 uint16_t k = (__ioim)->iotag >> BFA_IOIM_RETRY_TAG_OFFSET; \ 260 k++; (__ioim)->iotag &= BFA_IOIM_IOTAG_MASK; \ 261 (__ioim)->iotag |= k << BFA_IOIM_RETRY_TAG_OFFSET; \ 262 } while (0) 263 264 #define BFA_IOIM_TO_LPS(__ioim) \ 265 BFA_LPS_FROM_TAG(BFA_LPS_MOD(__ioim->bfa), \ 266 __ioim->itnim->rport->rport_info.lp_tag) 267 268 static inline bfa_boolean_t 269 bfa_ioim_maxretry_reached(struct bfa_ioim_s *ioim) 270 { 271 uint16_t k = ioim->iotag >> BFA_IOIM_RETRY_TAG_OFFSET; 272 if (k < BFA_IOIM_RETRY_MAX) 273 return BFA_FALSE; 274 return BFA_TRUE; 275 } 276 277 /* 278 * function prototypes 279 */ 280 void bfa_ioim_attach(struct bfa_fcpim_s *fcpim); 281 void bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg); 282 void bfa_ioim_good_comp_isr(struct bfa_s *bfa, 283 struct bfi_msg_s *msg); 284 void bfa_ioim_cleanup(struct bfa_ioim_s *ioim); 285 void bfa_ioim_cleanup_tm(struct bfa_ioim_s *ioim, 286 struct bfa_tskim_s *tskim); 287 void bfa_ioim_iocdisable(struct bfa_ioim_s *ioim); 288 void bfa_ioim_tov(struct bfa_ioim_s *ioim); 289 290 void bfa_tskim_attach(struct bfa_fcpim_s *fcpim); 291 void bfa_tskim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg); 292 void bfa_tskim_iodone(struct bfa_tskim_s *tskim); 293 void bfa_tskim_iocdisable(struct bfa_tskim_s *tskim); 294 void bfa_tskim_cleanup(struct bfa_tskim_s *tskim); 295 void bfa_tskim_res_recfg(struct bfa_s *bfa, u16 num_tskim_fw); 296 297 void bfa_itnim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len); 298 void bfa_itnim_attach(struct bfa_fcpim_s *fcpim); 299 void bfa_itnim_iocdisable(struct bfa_itnim_s *itnim); 300 void bfa_itnim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg); 301 void bfa_itnim_iodone(struct bfa_itnim_s *itnim); 302 void bfa_itnim_tskdone(struct bfa_itnim_s *itnim); 303 bfa_boolean_t bfa_itnim_hold_io(struct bfa_itnim_s *itnim); 304 305 /* 306 * bfa fcpim module API functions 307 */ 308 void bfa_fcpim_path_tov_set(struct bfa_s *bfa, u16 path_tov); 309 u16 bfa_fcpim_path_tov_get(struct bfa_s *bfa); 310 u16 bfa_fcpim_qdepth_get(struct bfa_s *bfa); 311 bfa_status_t bfa_fcpim_port_iostats(struct bfa_s *bfa, 312 struct bfa_itnim_iostats_s *stats, u8 lp_tag); 313 void bfa_fcpim_add_stats(struct bfa_itnim_iostats_s *fcpim_stats, 314 struct bfa_itnim_iostats_s *itnim_stats); 315 bfa_status_t bfa_fcpim_profile_on(struct bfa_s *bfa, u32 time); 316 bfa_status_t bfa_fcpim_profile_off(struct bfa_s *bfa); 317 318 #define bfa_fcpim_ioredirect_enabled(__bfa) \ 319 (((struct bfa_fcpim_s *)(BFA_FCPIM(__bfa)))->ioredirect) 320 321 #define bfa_fcpim_get_next_reqq(__bfa, __qid) \ 322 { \ 323 struct bfa_fcpim_s *__fcpim = BFA_FCPIM(__bfa); \ 324 __fcpim->reqq++; \ 325 __fcpim->reqq &= (BFI_IOC_MAX_CQS - 1); \ 326 *(__qid) = __fcpim->reqq; \ 327 } 328 329 #define bfa_iocfc_map_msg_to_qid(__msg, __qid) \ 330 *(__qid) = (u8)((__msg) & (BFI_IOC_MAX_CQS - 1)); 331 /* 332 * bfa itnim API functions 333 */ 334 struct bfa_itnim_s *bfa_itnim_create(struct bfa_s *bfa, 335 struct bfa_rport_s *rport, void *itnim); 336 void bfa_itnim_delete(struct bfa_itnim_s *itnim); 337 void bfa_itnim_online(struct bfa_itnim_s *itnim, bfa_boolean_t seq_rec); 338 void bfa_itnim_offline(struct bfa_itnim_s *itnim); 339 void bfa_itnim_clear_stats(struct bfa_itnim_s *itnim); 340 bfa_status_t bfa_itnim_get_ioprofile(struct bfa_itnim_s *itnim, 341 struct bfa_itnim_ioprofile_s *ioprofile); 342 343 #define bfa_itnim_get_reqq(__ioim) (((struct bfa_ioim_s *)__ioim)->itnim->reqq) 344 345 /* 346 * BFA completion callback for bfa_itnim_online(). 347 */ 348 void bfa_cb_itnim_online(void *itnim); 349 350 /* 351 * BFA completion callback for bfa_itnim_offline(). 352 */ 353 void bfa_cb_itnim_offline(void *itnim); 354 void bfa_cb_itnim_tov_begin(void *itnim); 355 void bfa_cb_itnim_tov(void *itnim); 356 357 /* 358 * BFA notification to FCS/driver for second level error recovery. 359 * Atleast one I/O request has timedout and target is unresponsive to 360 * repeated abort requests. Second level error recovery should be initiated 361 * by starting implicit logout and recovery procedures. 362 */ 363 void bfa_cb_itnim_sler(void *itnim); 364 365 /* 366 * bfa ioim API functions 367 */ 368 struct bfa_ioim_s *bfa_ioim_alloc(struct bfa_s *bfa, 369 struct bfad_ioim_s *dio, 370 struct bfa_itnim_s *itnim, 371 u16 nsgles); 372 373 void bfa_ioim_free(struct bfa_ioim_s *ioim); 374 void bfa_ioim_start(struct bfa_ioim_s *ioim); 375 bfa_status_t bfa_ioim_abort(struct bfa_ioim_s *ioim); 376 void bfa_ioim_delayed_comp(struct bfa_ioim_s *ioim, 377 bfa_boolean_t iotov); 378 /* 379 * I/O completion notification. 380 * 381 * @param[in] dio driver IO structure 382 * @param[in] io_status IO completion status 383 * @param[in] scsi_status SCSI status returned by target 384 * @param[in] sns_len SCSI sense length, 0 if none 385 * @param[in] sns_info SCSI sense data, if any 386 * @param[in] residue Residual length 387 * 388 * @return None 389 */ 390 void bfa_cb_ioim_done(void *bfad, struct bfad_ioim_s *dio, 391 enum bfi_ioim_status io_status, 392 u8 scsi_status, int sns_len, 393 u8 *sns_info, s32 residue); 394 395 /* 396 * I/O good completion notification. 397 */ 398 void bfa_cb_ioim_good_comp(void *bfad, struct bfad_ioim_s *dio); 399 400 /* 401 * I/O abort completion notification 402 */ 403 void bfa_cb_ioim_abort(void *bfad, struct bfad_ioim_s *dio); 404 405 /* 406 * bfa tskim API functions 407 */ 408 struct bfa_tskim_s *bfa_tskim_alloc(struct bfa_s *bfa, 409 struct bfad_tskim_s *dtsk); 410 void bfa_tskim_free(struct bfa_tskim_s *tskim); 411 void bfa_tskim_start(struct bfa_tskim_s *tskim, 412 struct bfa_itnim_s *itnim, struct scsi_lun lun, 413 enum fcp_tm_cmnd tm, u8 t_secs); 414 void bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk, 415 enum bfi_tskim_status tsk_status); 416 417 void bfa_fcpim_lunmask_rp_update(struct bfa_s *bfa, wwn_t lp_wwn, 418 wwn_t rp_wwn, u16 rp_tag, u8 lp_tag); 419 bfa_status_t bfa_fcpim_lunmask_update(struct bfa_s *bfa, u32 on_off); 420 bfa_status_t bfa_fcpim_lunmask_query(struct bfa_s *bfa, void *buf); 421 bfa_status_t bfa_fcpim_lunmask_delete(struct bfa_s *bfa, u16 vf_id, 422 wwn_t *pwwn, wwn_t rpwwn, struct scsi_lun lun); 423 bfa_status_t bfa_fcpim_lunmask_add(struct bfa_s *bfa, u16 vf_id, 424 wwn_t *pwwn, wwn_t rpwwn, struct scsi_lun lun); 425 bfa_status_t bfa_fcpim_lunmask_clear(struct bfa_s *bfa); 426 427 #endif /* __BFA_FCPIM_H__ */ 428