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 __BFA_FCPIM_H__ 20 #define __BFA_FCPIM_H__ 21 22 #include "bfa.h" 23 #include "bfa_svc.h" 24 #include "bfi_ms.h" 25 #include "bfa_defs_svc.h" 26 #include "bfa_cs.h" 27 28 /* FCP module related definitions */ 29 #define BFA_IO_MAX BFI_IO_MAX 30 #define BFA_FWTIO_MAX 2000 31 32 struct bfa_fcp_mod_s; 33 struct bfa_iotag_s { 34 struct list_head qe; /* queue element */ 35 u16 tag; /* FW IO tag */ 36 }; 37 38 struct bfa_itn_s { 39 bfa_isr_func_t isr; 40 }; 41 42 void bfa_itn_create(struct bfa_s *bfa, struct bfa_rport_s *rport, 43 void (*isr)(struct bfa_s *bfa, struct bfi_msg_s *m)); 44 void bfa_itn_isr(struct bfa_s *bfa, struct bfi_msg_s *m); 45 void bfa_iotag_attach(struct bfa_fcp_mod_s *fcp); 46 void bfa_fcp_res_recfg(struct bfa_s *bfa, u16 num_ioim_fw, u16 max_ioim_fw); 47 48 #define BFA_FCP_MOD(_hal) (&(_hal)->modules.fcp_mod) 49 #define BFA_MEM_FCP_KVA(__bfa) (&(BFA_FCP_MOD(__bfa)->kva_seg)) 50 #define BFA_IOTAG_FROM_TAG(_fcp, _tag) \ 51 (&(_fcp)->iotag_arr[(_tag & BFA_IOIM_IOTAG_MASK)]) 52 #define BFA_ITN_FROM_TAG(_fcp, _tag) \ 53 ((_fcp)->itn_arr + ((_tag) & ((_fcp)->num_itns - 1))) 54 #define BFA_SNSINFO_FROM_TAG(_fcp, _tag) \ 55 bfa_mem_get_dmabuf_kva(_fcp, (_tag & BFA_IOIM_IOTAG_MASK), \ 56 BFI_IOIM_SNSLEN) 57 58 59 #define BFA_ITNIM_MIN 32 60 #define BFA_ITNIM_MAX 1024 61 62 #define BFA_IOIM_MIN 8 63 #define BFA_IOIM_MAX 2000 64 65 #define BFA_TSKIM_MIN 4 66 #define BFA_TSKIM_MAX 512 67 #define BFA_FCPIM_PATHTOV_DEF (30 * 1000) /* in millisecs */ 68 #define BFA_FCPIM_PATHTOV_MAX (90 * 1000) /* in millisecs */ 69 70 71 #define bfa_itnim_ioprofile_update(__itnim, __index) \ 72 (__itnim->ioprofile.iocomps[__index]++) 73 74 #define BFA_IOIM_RETRY_TAG_OFFSET 11 75 #define BFA_IOIM_IOTAG_MASK 0x07ff /* 2K IOs */ 76 #define BFA_IOIM_RETRY_MAX 7 77 78 /* Buckets are are 512 bytes to 2MB */ 79 static inline u32 80 bfa_ioim_get_index(u32 n) { 81 int pos = 0; 82 if (n >= (1UL)<<22) 83 return BFA_IOBUCKET_MAX - 1; 84 n >>= 8; 85 if (n >= (1UL)<<16) { 86 n >>= 16; 87 pos += 16; 88 } 89 if (n >= 1 << 8) { 90 n >>= 8; 91 pos += 8; 92 } 93 if (n >= 1 << 4) { 94 n >>= 4; 95 pos += 4; 96 } 97 if (n >= 1 << 2) { 98 n >>= 2; 99 pos += 2; 100 } 101 if (n >= 1 << 1) 102 pos += 1; 103 104 return (n == 0) ? (0) : pos; 105 } 106 107 /* 108 * forward declarations 109 */ 110 struct bfa_ioim_s; 111 struct bfa_tskim_s; 112 struct bfad_ioim_s; 113 struct bfad_tskim_s; 114 115 typedef void (*bfa_fcpim_profile_t) (struct bfa_ioim_s *ioim); 116 117 struct bfa_fcpim_s { 118 struct bfa_s *bfa; 119 struct bfa_fcp_mod_s *fcp; 120 struct bfa_itnim_s *itnim_arr; 121 struct bfa_ioim_s *ioim_arr; 122 struct bfa_ioim_sp_s *ioim_sp_arr; 123 struct bfa_tskim_s *tskim_arr; 124 int num_itnims; 125 int num_tskim_reqs; 126 u32 path_tov; 127 u16 q_depth; 128 u8 reqq; /* Request queue to be used */ 129 struct list_head itnim_q; /* queue of active itnim */ 130 struct list_head ioim_resfree_q; /* IOs waiting for f/w */ 131 struct list_head ioim_comp_q; /* IO global comp Q */ 132 struct list_head tskim_free_q; 133 struct list_head tskim_unused_q; /* Unused tskim Q */ 134 u32 ios_active; /* current active IOs */ 135 u32 delay_comp; 136 struct bfa_fcpim_del_itn_stats_s del_itn_stats; 137 bfa_boolean_t ioredirect; 138 bfa_boolean_t io_profile; 139 u32 io_profile_start_time; 140 bfa_fcpim_profile_t profile_comp; 141 bfa_fcpim_profile_t profile_start; 142 }; 143 144 /* Max FCP dma segs required */ 145 #define BFA_FCP_DMA_SEGS BFI_IOIM_SNSBUF_SEGS 146 147 struct bfa_fcp_mod_s { 148 struct bfa_s *bfa; 149 struct list_head iotag_ioim_free_q; /* free IO resources */ 150 struct list_head iotag_tio_free_q; /* free IO resources */ 151 struct list_head iotag_unused_q; /* unused IO resources*/ 152 struct bfa_iotag_s *iotag_arr; 153 struct bfa_itn_s *itn_arr; 154 int max_ioim_reqs; 155 int num_ioim_reqs; 156 int num_fwtio_reqs; 157 int num_itns; 158 struct bfa_dma_s snsbase[BFA_FCP_DMA_SEGS]; 159 struct bfa_fcpim_s fcpim; 160 struct bfa_mem_dma_s dma_seg[BFA_FCP_DMA_SEGS]; 161 struct bfa_mem_kva_s kva_seg; 162 int throttle_update_required; 163 }; 164 165 /* 166 * BFA IO (initiator mode) 167 */ 168 struct bfa_ioim_s { 169 struct list_head qe; /* queue elememt */ 170 bfa_sm_t sm; /* BFA ioim state machine */ 171 struct bfa_s *bfa; /* BFA module */ 172 struct bfa_fcpim_s *fcpim; /* parent fcpim module */ 173 struct bfa_itnim_s *itnim; /* i-t-n nexus for this IO */ 174 struct bfad_ioim_s *dio; /* driver IO handle */ 175 u16 iotag; /* FWI IO tag */ 176 u16 abort_tag; /* unqiue abort request tag */ 177 u16 nsges; /* number of SG elements */ 178 u16 nsgpgs; /* number of SG pages */ 179 struct bfa_sgpg_s *sgpg; /* first SG page */ 180 struct list_head sgpg_q; /* allocated SG pages */ 181 struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */ 182 bfa_cb_cbfn_t io_cbfn; /* IO completion handler */ 183 struct bfa_ioim_sp_s *iosp; /* slow-path IO handling */ 184 u8 reqq; /* Request queue for I/O */ 185 u8 mode; /* IO is passthrough or not */ 186 u64 start_time; /* IO's Profile start val */ 187 }; 188 189 struct bfa_ioim_sp_s { 190 struct bfi_msg_s comp_rspmsg; /* IO comp f/w response */ 191 struct bfa_sgpg_wqe_s sgpg_wqe; /* waitq elem for sgpg */ 192 struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */ 193 bfa_boolean_t abort_explicit; /* aborted by OS */ 194 struct bfa_tskim_s *tskim; /* Relevant TM cmd */ 195 }; 196 197 /* 198 * BFA Task management command (initiator mode) 199 */ 200 struct bfa_tskim_s { 201 struct list_head qe; 202 bfa_sm_t sm; 203 struct bfa_s *bfa; /* BFA module */ 204 struct bfa_fcpim_s *fcpim; /* parent fcpim module */ 205 struct bfa_itnim_s *itnim; /* i-t-n nexus for this IO */ 206 struct bfad_tskim_s *dtsk; /* driver task mgmt cmnd */ 207 bfa_boolean_t notify; /* notify itnim on TM comp */ 208 struct scsi_lun lun; /* lun if applicable */ 209 enum fcp_tm_cmnd tm_cmnd; /* task management command */ 210 u16 tsk_tag; /* FWI IO tag */ 211 u8 tsecs; /* timeout in seconds */ 212 struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */ 213 struct list_head io_q; /* queue of affected IOs */ 214 struct bfa_wc_s wc; /* waiting counter */ 215 struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */ 216 enum bfi_tskim_status tsk_status; /* TM status */ 217 }; 218 219 /* 220 * BFA i-t-n (initiator mode) 221 */ 222 struct bfa_itnim_s { 223 struct list_head qe; /* queue element */ 224 bfa_sm_t sm; /* i-t-n im BFA state machine */ 225 struct bfa_s *bfa; /* bfa instance */ 226 struct bfa_rport_s *rport; /* bfa rport */ 227 void *ditn; /* driver i-t-n structure */ 228 struct bfi_mhdr_s mhdr; /* pre-built mhdr */ 229 u8 msg_no; /* itnim/rport firmware handle */ 230 u8 reqq; /* CQ for requests */ 231 struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */ 232 struct list_head pending_q; /* queue of pending IO requests */ 233 struct list_head io_q; /* queue of active IO requests */ 234 struct list_head io_cleanup_q; /* IO being cleaned up */ 235 struct list_head tsk_q; /* queue of active TM commands */ 236 struct list_head delay_comp_q; /* queue of failed inflight cmds */ 237 bfa_boolean_t seq_rec; /* SQER supported */ 238 bfa_boolean_t is_online; /* itnim is ONLINE for IO */ 239 bfa_boolean_t iotov_active; /* IO TOV timer is active */ 240 struct bfa_wc_s wc; /* waiting counter */ 241 struct bfa_timer_s timer; /* pending IO TOV */ 242 struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */ 243 struct bfa_fcpim_s *fcpim; /* fcpim module */ 244 struct bfa_itnim_iostats_s stats; 245 struct bfa_itnim_ioprofile_s ioprofile; 246 }; 247 248 #define bfa_itnim_is_online(_itnim) ((_itnim)->is_online) 249 #define BFA_FCPIM(_hal) (&(_hal)->modules.fcp_mod.fcpim) 250 #define BFA_IOIM_TAG_2_ID(_iotag) ((_iotag) & BFA_IOIM_IOTAG_MASK) 251 #define BFA_IOIM_FROM_TAG(_fcpim, _iotag) \ 252 (&fcpim->ioim_arr[(_iotag & BFA_IOIM_IOTAG_MASK)]) 253 #define BFA_TSKIM_FROM_TAG(_fcpim, _tmtag) \ 254 (&fcpim->tskim_arr[_tmtag & (fcpim->num_tskim_reqs - 1)]) 255 256 #define bfa_io_profile_start_time(_bfa) \ 257 ((_bfa)->modules.fcp_mod.fcpim.io_profile_start_time) 258 #define bfa_fcpim_get_io_profile(_bfa) \ 259 ((_bfa)->modules.fcp_mod.fcpim.io_profile) 260 #define bfa_ioim_update_iotag(__ioim) do { \ 261 uint16_t k = (__ioim)->iotag >> BFA_IOIM_RETRY_TAG_OFFSET; \ 262 k++; (__ioim)->iotag &= BFA_IOIM_IOTAG_MASK; \ 263 (__ioim)->iotag |= k << BFA_IOIM_RETRY_TAG_OFFSET; \ 264 } while (0) 265 266 static inline bfa_boolean_t 267 bfa_ioim_maxretry_reached(struct bfa_ioim_s *ioim) 268 { 269 uint16_t k = ioim->iotag >> BFA_IOIM_RETRY_TAG_OFFSET; 270 if (k < BFA_IOIM_RETRY_MAX) 271 return BFA_FALSE; 272 return BFA_TRUE; 273 } 274 275 /* 276 * function prototypes 277 */ 278 void bfa_ioim_attach(struct bfa_fcpim_s *fcpim); 279 void bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg); 280 void bfa_ioim_good_comp_isr(struct bfa_s *bfa, 281 struct bfi_msg_s *msg); 282 void bfa_ioim_cleanup(struct bfa_ioim_s *ioim); 283 void bfa_ioim_cleanup_tm(struct bfa_ioim_s *ioim, 284 struct bfa_tskim_s *tskim); 285 void bfa_ioim_iocdisable(struct bfa_ioim_s *ioim); 286 void bfa_ioim_tov(struct bfa_ioim_s *ioim); 287 288 void bfa_tskim_attach(struct bfa_fcpim_s *fcpim); 289 void bfa_tskim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg); 290 void bfa_tskim_iodone(struct bfa_tskim_s *tskim); 291 void bfa_tskim_iocdisable(struct bfa_tskim_s *tskim); 292 void bfa_tskim_cleanup(struct bfa_tskim_s *tskim); 293 void bfa_tskim_res_recfg(struct bfa_s *bfa, u16 num_tskim_fw); 294 295 void bfa_itnim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len); 296 void bfa_itnim_attach(struct bfa_fcpim_s *fcpim); 297 void bfa_itnim_iocdisable(struct bfa_itnim_s *itnim); 298 void bfa_itnim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg); 299 void bfa_itnim_iodone(struct bfa_itnim_s *itnim); 300 void bfa_itnim_tskdone(struct bfa_itnim_s *itnim); 301 bfa_boolean_t bfa_itnim_hold_io(struct bfa_itnim_s *itnim); 302 303 /* 304 * bfa fcpim module API functions 305 */ 306 void bfa_fcpim_path_tov_set(struct bfa_s *bfa, u16 path_tov); 307 u16 bfa_fcpim_path_tov_get(struct bfa_s *bfa); 308 u16 bfa_fcpim_qdepth_get(struct bfa_s *bfa); 309 bfa_status_t bfa_fcpim_port_iostats(struct bfa_s *bfa, 310 struct bfa_itnim_iostats_s *stats, u8 lp_tag); 311 void bfa_fcpim_add_stats(struct bfa_itnim_iostats_s *fcpim_stats, 312 struct bfa_itnim_iostats_s *itnim_stats); 313 bfa_status_t bfa_fcpim_profile_on(struct bfa_s *bfa, u32 time); 314 bfa_status_t bfa_fcpim_profile_off(struct bfa_s *bfa); 315 316 #define bfa_fcpim_ioredirect_enabled(__bfa) \ 317 (((struct bfa_fcpim_s *)(BFA_FCPIM(__bfa)))->ioredirect) 318 319 #define bfa_fcpim_get_next_reqq(__bfa, __qid) \ 320 { \ 321 struct bfa_fcpim_s *__fcpim = BFA_FCPIM(__bfa); \ 322 __fcpim->reqq++; \ 323 __fcpim->reqq &= (BFI_IOC_MAX_CQS - 1); \ 324 *(__qid) = __fcpim->reqq; \ 325 } 326 327 #define bfa_iocfc_map_msg_to_qid(__msg, __qid) \ 328 *(__qid) = (u8)((__msg) & (BFI_IOC_MAX_CQS - 1)); 329 /* 330 * bfa itnim API functions 331 */ 332 struct bfa_itnim_s *bfa_itnim_create(struct bfa_s *bfa, 333 struct bfa_rport_s *rport, void *itnim); 334 void bfa_itnim_delete(struct bfa_itnim_s *itnim); 335 void bfa_itnim_online(struct bfa_itnim_s *itnim, bfa_boolean_t seq_rec); 336 void bfa_itnim_offline(struct bfa_itnim_s *itnim); 337 void bfa_itnim_clear_stats(struct bfa_itnim_s *itnim); 338 bfa_status_t bfa_itnim_get_ioprofile(struct bfa_itnim_s *itnim, 339 struct bfa_itnim_ioprofile_s *ioprofile); 340 341 #define bfa_itnim_get_reqq(__ioim) (((struct bfa_ioim_s *)__ioim)->itnim->reqq) 342 343 /* 344 * BFA completion callback for bfa_itnim_online(). 345 */ 346 void bfa_cb_itnim_online(void *itnim); 347 348 /* 349 * BFA completion callback for bfa_itnim_offline(). 350 */ 351 void bfa_cb_itnim_offline(void *itnim); 352 void bfa_cb_itnim_tov_begin(void *itnim); 353 void bfa_cb_itnim_tov(void *itnim); 354 355 /* 356 * BFA notification to FCS/driver for second level error recovery. 357 * Atleast one I/O request has timedout and target is unresponsive to 358 * repeated abort requests. Second level error recovery should be initiated 359 * by starting implicit logout and recovery procedures. 360 */ 361 void bfa_cb_itnim_sler(void *itnim); 362 363 /* 364 * bfa ioim API functions 365 */ 366 struct bfa_ioim_s *bfa_ioim_alloc(struct bfa_s *bfa, 367 struct bfad_ioim_s *dio, 368 struct bfa_itnim_s *itnim, 369 u16 nsgles); 370 371 void bfa_ioim_free(struct bfa_ioim_s *ioim); 372 void bfa_ioim_start(struct bfa_ioim_s *ioim); 373 bfa_status_t bfa_ioim_abort(struct bfa_ioim_s *ioim); 374 void bfa_ioim_delayed_comp(struct bfa_ioim_s *ioim, 375 bfa_boolean_t iotov); 376 /* 377 * I/O completion notification. 378 * 379 * @param[in] dio driver IO structure 380 * @param[in] io_status IO completion status 381 * @param[in] scsi_status SCSI status returned by target 382 * @param[in] sns_len SCSI sense length, 0 if none 383 * @param[in] sns_info SCSI sense data, if any 384 * @param[in] residue Residual length 385 * 386 * @return None 387 */ 388 void bfa_cb_ioim_done(void *bfad, struct bfad_ioim_s *dio, 389 enum bfi_ioim_status io_status, 390 u8 scsi_status, int sns_len, 391 u8 *sns_info, s32 residue); 392 393 /* 394 * I/O good completion notification. 395 */ 396 void bfa_cb_ioim_good_comp(void *bfad, struct bfad_ioim_s *dio); 397 398 /* 399 * I/O abort completion notification 400 */ 401 void bfa_cb_ioim_abort(void *bfad, struct bfad_ioim_s *dio); 402 403 /* 404 * bfa tskim API functions 405 */ 406 struct bfa_tskim_s *bfa_tskim_alloc(struct bfa_s *bfa, 407 struct bfad_tskim_s *dtsk); 408 void bfa_tskim_free(struct bfa_tskim_s *tskim); 409 void bfa_tskim_start(struct bfa_tskim_s *tskim, 410 struct bfa_itnim_s *itnim, struct scsi_lun lun, 411 enum fcp_tm_cmnd tm, u8 t_secs); 412 void bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk, 413 enum bfi_tskim_status tsk_status); 414 415 void bfa_fcpim_lunmask_rp_update(struct bfa_s *bfa, wwn_t lp_wwn, 416 wwn_t rp_wwn, u16 rp_tag, u8 lp_tag); 417 bfa_status_t bfa_fcpim_lunmask_update(struct bfa_s *bfa, u32 on_off); 418 bfa_status_t bfa_fcpim_lunmask_query(struct bfa_s *bfa, void *buf); 419 bfa_status_t bfa_fcpim_lunmask_delete(struct bfa_s *bfa, u16 vf_id, 420 wwn_t *pwwn, wwn_t rpwwn, struct scsi_lun lun); 421 bfa_status_t bfa_fcpim_lunmask_add(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_clear(struct bfa_s *bfa); 424 u16 bfa_fcpim_read_throttle(struct bfa_s *bfa); 425 bfa_status_t bfa_fcpim_write_throttle(struct bfa_s *bfa, u16 value); 426 bfa_status_t bfa_fcpim_throttle_set(struct bfa_s *bfa, u16 value); 427 bfa_status_t bfa_fcpim_throttle_get(struct bfa_s *bfa, void *buf); 428 u16 bfa_fcpim_get_throttle_cfg(struct bfa_s *bfa, u16 drv_cfg_param); 429 430 #endif /* __BFA_FCPIM_H__ */ 431