Jing Huang | 7725ccf | 2009-09-23 17:46:15 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2005-2009 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 | #include <bfa.h> |
| 19 | #include <cs/bfa_debug.h> |
| 20 | #include <bfa_cb_ioim_macros.h> |
| 21 | |
| 22 | BFA_TRC_FILE(HAL, IOIM); |
| 23 | |
| 24 | /* |
| 25 | * forward declarations. |
| 26 | */ |
| 27 | static bfa_boolean_t bfa_ioim_send_ioreq(struct bfa_ioim_s *ioim); |
| 28 | static bfa_boolean_t bfa_ioim_sge_setup(struct bfa_ioim_s *ioim); |
| 29 | static void bfa_ioim_sgpg_setup(struct bfa_ioim_s *ioim); |
| 30 | static bfa_boolean_t bfa_ioim_send_abort(struct bfa_ioim_s *ioim); |
| 31 | static void bfa_ioim_notify_cleanup(struct bfa_ioim_s *ioim); |
| 32 | static void __bfa_cb_ioim_good_comp(void *cbarg, bfa_boolean_t complete); |
| 33 | static void __bfa_cb_ioim_comp(void *cbarg, bfa_boolean_t complete); |
| 34 | static void __bfa_cb_ioim_abort(void *cbarg, bfa_boolean_t complete); |
| 35 | static void __bfa_cb_ioim_failed(void *cbarg, bfa_boolean_t complete); |
| 36 | static void __bfa_cb_ioim_pathtov(void *cbarg, bfa_boolean_t complete); |
| 37 | |
| 38 | /** |
| 39 | * bfa_ioim_sm |
| 40 | */ |
| 41 | |
| 42 | /** |
| 43 | * IO state machine events |
| 44 | */ |
| 45 | enum bfa_ioim_event { |
| 46 | BFA_IOIM_SM_START = 1, /* io start request from host */ |
| 47 | BFA_IOIM_SM_COMP_GOOD = 2, /* io good comp, resource free */ |
| 48 | BFA_IOIM_SM_COMP = 3, /* io comp, resource is free */ |
| 49 | BFA_IOIM_SM_COMP_UTAG = 4, /* io comp, resource is free */ |
| 50 | BFA_IOIM_SM_DONE = 5, /* io comp, resource not free */ |
| 51 | BFA_IOIM_SM_FREE = 6, /* io resource is freed */ |
| 52 | BFA_IOIM_SM_ABORT = 7, /* abort request from scsi stack */ |
| 53 | BFA_IOIM_SM_ABORT_COMP = 8, /* abort from f/w */ |
| 54 | BFA_IOIM_SM_ABORT_DONE = 9, /* abort completion from f/w */ |
| 55 | BFA_IOIM_SM_QRESUME = 10, /* CQ space available to queue IO */ |
| 56 | BFA_IOIM_SM_SGALLOCED = 11, /* SG page allocation successful */ |
| 57 | BFA_IOIM_SM_SQRETRY = 12, /* sequence recovery retry */ |
| 58 | BFA_IOIM_SM_HCB = 13, /* bfa callback complete */ |
| 59 | BFA_IOIM_SM_CLEANUP = 14, /* IO cleanup from itnim */ |
| 60 | BFA_IOIM_SM_TMSTART = 15, /* IO cleanup from tskim */ |
| 61 | BFA_IOIM_SM_TMDONE = 16, /* IO cleanup from tskim */ |
| 62 | BFA_IOIM_SM_HWFAIL = 17, /* IOC h/w failure event */ |
| 63 | BFA_IOIM_SM_IOTOV = 18, /* ITN offline TOV */ |
| 64 | }; |
| 65 | |
| 66 | /* |
| 67 | * forward declaration of IO state machine |
| 68 | */ |
| 69 | static void bfa_ioim_sm_uninit(struct bfa_ioim_s *ioim, |
| 70 | enum bfa_ioim_event event); |
| 71 | static void bfa_ioim_sm_sgalloc(struct bfa_ioim_s *ioim, |
| 72 | enum bfa_ioim_event event); |
| 73 | static void bfa_ioim_sm_active(struct bfa_ioim_s *ioim, |
| 74 | enum bfa_ioim_event event); |
| 75 | static void bfa_ioim_sm_abort(struct bfa_ioim_s *ioim, |
| 76 | enum bfa_ioim_event event); |
| 77 | static void bfa_ioim_sm_cleanup(struct bfa_ioim_s *ioim, |
| 78 | enum bfa_ioim_event event); |
| 79 | static void bfa_ioim_sm_qfull(struct bfa_ioim_s *ioim, |
| 80 | enum bfa_ioim_event event); |
| 81 | static void bfa_ioim_sm_abort_qfull(struct bfa_ioim_s *ioim, |
| 82 | enum bfa_ioim_event event); |
| 83 | static void bfa_ioim_sm_cleanup_qfull(struct bfa_ioim_s *ioim, |
| 84 | enum bfa_ioim_event event); |
| 85 | static void bfa_ioim_sm_hcb(struct bfa_ioim_s *ioim, |
| 86 | enum bfa_ioim_event event); |
| 87 | static void bfa_ioim_sm_hcb_free(struct bfa_ioim_s *ioim, |
| 88 | enum bfa_ioim_event event); |
| 89 | static void bfa_ioim_sm_resfree(struct bfa_ioim_s *ioim, |
| 90 | enum bfa_ioim_event event); |
| 91 | |
| 92 | /** |
| 93 | * IO is not started (unallocated). |
| 94 | */ |
| 95 | static void |
| 96 | bfa_ioim_sm_uninit(struct bfa_ioim_s *ioim, enum bfa_ioim_event event) |
| 97 | { |
| 98 | bfa_trc_fp(ioim->bfa, ioim->iotag); |
| 99 | bfa_trc_fp(ioim->bfa, event); |
| 100 | |
| 101 | switch (event) { |
| 102 | case BFA_IOIM_SM_START: |
| 103 | if (!bfa_itnim_is_online(ioim->itnim)) { |
| 104 | if (!bfa_itnim_hold_io(ioim->itnim)) { |
| 105 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 106 | list_del(&ioim->qe); |
| 107 | list_add_tail(&ioim->qe, |
Jing Huang | f8ceafd | 2009-09-25 12:29:54 -0700 | [diff] [blame] | 108 | &ioim->fcpim->ioim_comp_q); |
Jing Huang | 7725ccf | 2009-09-23 17:46:15 -0700 | [diff] [blame] | 109 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, |
| 110 | __bfa_cb_ioim_pathtov, ioim); |
| 111 | } else { |
| 112 | list_del(&ioim->qe); |
| 113 | list_add_tail(&ioim->qe, |
Jing Huang | f8ceafd | 2009-09-25 12:29:54 -0700 | [diff] [blame] | 114 | &ioim->itnim->pending_q); |
Jing Huang | 7725ccf | 2009-09-23 17:46:15 -0700 | [diff] [blame] | 115 | } |
| 116 | break; |
| 117 | } |
| 118 | |
| 119 | if (ioim->nsges > BFI_SGE_INLINE) { |
| 120 | if (!bfa_ioim_sge_setup(ioim)) { |
| 121 | bfa_sm_set_state(ioim, bfa_ioim_sm_sgalloc); |
| 122 | return; |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | if (!bfa_ioim_send_ioreq(ioim)) { |
| 127 | bfa_sm_set_state(ioim, bfa_ioim_sm_qfull); |
| 128 | break; |
| 129 | } |
| 130 | |
| 131 | bfa_sm_set_state(ioim, bfa_ioim_sm_active); |
| 132 | break; |
| 133 | |
| 134 | case BFA_IOIM_SM_IOTOV: |
| 135 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 136 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, |
| 137 | __bfa_cb_ioim_pathtov, ioim); |
| 138 | break; |
| 139 | |
| 140 | case BFA_IOIM_SM_ABORT: |
| 141 | /** |
| 142 | * IO in pending queue can get abort requests. Complete abort |
| 143 | * requests immediately. |
| 144 | */ |
| 145 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 146 | bfa_assert(bfa_q_is_on_q(&ioim->itnim->pending_q, ioim)); |
| 147 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort, |
| 148 | ioim); |
| 149 | break; |
| 150 | |
| 151 | default: |
Krishna Gudipati | e641de3 | 2010-03-05 19:35:02 -0800 | [diff] [blame^] | 152 | bfa_sm_fault(ioim->bfa, event); |
Jing Huang | 7725ccf | 2009-09-23 17:46:15 -0700 | [diff] [blame] | 153 | } |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * IO is waiting for SG pages. |
| 158 | */ |
| 159 | static void |
| 160 | bfa_ioim_sm_sgalloc(struct bfa_ioim_s *ioim, enum bfa_ioim_event event) |
| 161 | { |
| 162 | bfa_trc(ioim->bfa, ioim->iotag); |
| 163 | bfa_trc(ioim->bfa, event); |
| 164 | |
| 165 | switch (event) { |
| 166 | case BFA_IOIM_SM_SGALLOCED: |
| 167 | if (!bfa_ioim_send_ioreq(ioim)) { |
| 168 | bfa_sm_set_state(ioim, bfa_ioim_sm_qfull); |
| 169 | break; |
| 170 | } |
| 171 | bfa_sm_set_state(ioim, bfa_ioim_sm_active); |
| 172 | break; |
| 173 | |
| 174 | case BFA_IOIM_SM_CLEANUP: |
| 175 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 176 | bfa_sgpg_wcancel(ioim->bfa, &ioim->iosp->sgpg_wqe); |
| 177 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed, |
| 178 | ioim); |
| 179 | bfa_ioim_notify_cleanup(ioim); |
| 180 | break; |
| 181 | |
| 182 | case BFA_IOIM_SM_ABORT: |
| 183 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 184 | bfa_sgpg_wcancel(ioim->bfa, &ioim->iosp->sgpg_wqe); |
| 185 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort, |
| 186 | ioim); |
| 187 | break; |
| 188 | |
| 189 | case BFA_IOIM_SM_HWFAIL: |
| 190 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 191 | bfa_sgpg_wcancel(ioim->bfa, &ioim->iosp->sgpg_wqe); |
| 192 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed, |
| 193 | ioim); |
| 194 | break; |
| 195 | |
| 196 | default: |
Krishna Gudipati | e641de3 | 2010-03-05 19:35:02 -0800 | [diff] [blame^] | 197 | bfa_sm_fault(ioim->bfa, event); |
Jing Huang | 7725ccf | 2009-09-23 17:46:15 -0700 | [diff] [blame] | 198 | } |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * IO is active. |
| 203 | */ |
| 204 | static void |
| 205 | bfa_ioim_sm_active(struct bfa_ioim_s *ioim, enum bfa_ioim_event event) |
| 206 | { |
| 207 | bfa_trc_fp(ioim->bfa, ioim->iotag); |
| 208 | bfa_trc_fp(ioim->bfa, event); |
| 209 | |
| 210 | switch (event) { |
| 211 | case BFA_IOIM_SM_COMP_GOOD: |
| 212 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 213 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, |
| 214 | __bfa_cb_ioim_good_comp, ioim); |
| 215 | break; |
| 216 | |
| 217 | case BFA_IOIM_SM_COMP: |
| 218 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 219 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_comp, |
| 220 | ioim); |
| 221 | break; |
| 222 | |
| 223 | case BFA_IOIM_SM_DONE: |
| 224 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free); |
| 225 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_comp, |
| 226 | ioim); |
| 227 | break; |
| 228 | |
| 229 | case BFA_IOIM_SM_ABORT: |
| 230 | ioim->iosp->abort_explicit = BFA_TRUE; |
| 231 | ioim->io_cbfn = __bfa_cb_ioim_abort; |
| 232 | |
| 233 | if (bfa_ioim_send_abort(ioim)) |
| 234 | bfa_sm_set_state(ioim, bfa_ioim_sm_abort); |
| 235 | else { |
| 236 | bfa_sm_set_state(ioim, bfa_ioim_sm_abort_qfull); |
| 237 | bfa_reqq_wait(ioim->bfa, ioim->itnim->reqq, |
| 238 | &ioim->iosp->reqq_wait); |
| 239 | } |
| 240 | break; |
| 241 | |
| 242 | case BFA_IOIM_SM_CLEANUP: |
| 243 | ioim->iosp->abort_explicit = BFA_FALSE; |
| 244 | ioim->io_cbfn = __bfa_cb_ioim_failed; |
| 245 | |
| 246 | if (bfa_ioim_send_abort(ioim)) |
| 247 | bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup); |
| 248 | else { |
| 249 | bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup_qfull); |
| 250 | bfa_reqq_wait(ioim->bfa, ioim->itnim->reqq, |
| 251 | &ioim->iosp->reqq_wait); |
| 252 | } |
| 253 | break; |
| 254 | |
| 255 | case BFA_IOIM_SM_HWFAIL: |
| 256 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 257 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed, |
| 258 | ioim); |
| 259 | break; |
| 260 | |
| 261 | default: |
Krishna Gudipati | e641de3 | 2010-03-05 19:35:02 -0800 | [diff] [blame^] | 262 | bfa_sm_fault(ioim->bfa, event); |
Jing Huang | 7725ccf | 2009-09-23 17:46:15 -0700 | [diff] [blame] | 263 | } |
| 264 | } |
| 265 | |
| 266 | /** |
| 267 | * IO is being aborted, waiting for completion from firmware. |
| 268 | */ |
| 269 | static void |
| 270 | bfa_ioim_sm_abort(struct bfa_ioim_s *ioim, enum bfa_ioim_event event) |
| 271 | { |
| 272 | bfa_trc(ioim->bfa, ioim->iotag); |
| 273 | bfa_trc(ioim->bfa, event); |
| 274 | |
| 275 | switch (event) { |
| 276 | case BFA_IOIM_SM_COMP_GOOD: |
| 277 | case BFA_IOIM_SM_COMP: |
| 278 | case BFA_IOIM_SM_DONE: |
| 279 | case BFA_IOIM_SM_FREE: |
| 280 | break; |
| 281 | |
| 282 | case BFA_IOIM_SM_ABORT_DONE: |
| 283 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free); |
| 284 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort, |
| 285 | ioim); |
| 286 | break; |
| 287 | |
| 288 | case BFA_IOIM_SM_ABORT_COMP: |
| 289 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 290 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort, |
| 291 | ioim); |
| 292 | break; |
| 293 | |
| 294 | case BFA_IOIM_SM_COMP_UTAG: |
| 295 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 296 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort, |
| 297 | ioim); |
| 298 | break; |
| 299 | |
| 300 | case BFA_IOIM_SM_CLEANUP: |
| 301 | bfa_assert(ioim->iosp->abort_explicit == BFA_TRUE); |
| 302 | ioim->iosp->abort_explicit = BFA_FALSE; |
| 303 | |
| 304 | if (bfa_ioim_send_abort(ioim)) |
| 305 | bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup); |
| 306 | else { |
| 307 | bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup_qfull); |
| 308 | bfa_reqq_wait(ioim->bfa, ioim->itnim->reqq, |
| 309 | &ioim->iosp->reqq_wait); |
| 310 | } |
| 311 | break; |
| 312 | |
| 313 | case BFA_IOIM_SM_HWFAIL: |
| 314 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 315 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed, |
| 316 | ioim); |
| 317 | break; |
| 318 | |
| 319 | default: |
Krishna Gudipati | e641de3 | 2010-03-05 19:35:02 -0800 | [diff] [blame^] | 320 | bfa_sm_fault(ioim->bfa, event); |
Jing Huang | 7725ccf | 2009-09-23 17:46:15 -0700 | [diff] [blame] | 321 | } |
| 322 | } |
| 323 | |
| 324 | /** |
| 325 | * IO is being cleaned up (implicit abort), waiting for completion from |
| 326 | * firmware. |
| 327 | */ |
| 328 | static void |
| 329 | bfa_ioim_sm_cleanup(struct bfa_ioim_s *ioim, enum bfa_ioim_event event) |
| 330 | { |
| 331 | bfa_trc(ioim->bfa, ioim->iotag); |
| 332 | bfa_trc(ioim->bfa, event); |
| 333 | |
| 334 | switch (event) { |
| 335 | case BFA_IOIM_SM_COMP_GOOD: |
| 336 | case BFA_IOIM_SM_COMP: |
| 337 | case BFA_IOIM_SM_DONE: |
| 338 | case BFA_IOIM_SM_FREE: |
| 339 | break; |
| 340 | |
| 341 | case BFA_IOIM_SM_ABORT: |
| 342 | /** |
| 343 | * IO is already being aborted implicitly |
| 344 | */ |
| 345 | ioim->io_cbfn = __bfa_cb_ioim_abort; |
| 346 | break; |
| 347 | |
| 348 | case BFA_IOIM_SM_ABORT_DONE: |
| 349 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free); |
| 350 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim); |
| 351 | bfa_ioim_notify_cleanup(ioim); |
| 352 | break; |
| 353 | |
| 354 | case BFA_IOIM_SM_ABORT_COMP: |
| 355 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 356 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim); |
| 357 | bfa_ioim_notify_cleanup(ioim); |
| 358 | break; |
| 359 | |
| 360 | case BFA_IOIM_SM_COMP_UTAG: |
| 361 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 362 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim); |
| 363 | bfa_ioim_notify_cleanup(ioim); |
| 364 | break; |
| 365 | |
| 366 | case BFA_IOIM_SM_HWFAIL: |
| 367 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 368 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed, |
| 369 | ioim); |
| 370 | break; |
| 371 | |
| 372 | case BFA_IOIM_SM_CLEANUP: |
| 373 | /** |
| 374 | * IO can be in cleanup state already due to TM command. 2nd cleanup |
| 375 | * request comes from ITN offline event. |
| 376 | */ |
| 377 | break; |
| 378 | |
| 379 | default: |
Krishna Gudipati | e641de3 | 2010-03-05 19:35:02 -0800 | [diff] [blame^] | 380 | bfa_sm_fault(ioim->bfa, event); |
Jing Huang | 7725ccf | 2009-09-23 17:46:15 -0700 | [diff] [blame] | 381 | } |
| 382 | } |
| 383 | |
| 384 | /** |
| 385 | * IO is waiting for room in request CQ |
| 386 | */ |
| 387 | static void |
| 388 | bfa_ioim_sm_qfull(struct bfa_ioim_s *ioim, enum bfa_ioim_event event) |
| 389 | { |
| 390 | bfa_trc(ioim->bfa, ioim->iotag); |
| 391 | bfa_trc(ioim->bfa, event); |
| 392 | |
| 393 | switch (event) { |
| 394 | case BFA_IOIM_SM_QRESUME: |
| 395 | bfa_sm_set_state(ioim, bfa_ioim_sm_active); |
| 396 | bfa_ioim_send_ioreq(ioim); |
| 397 | break; |
| 398 | |
| 399 | case BFA_IOIM_SM_ABORT: |
| 400 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 401 | bfa_reqq_wcancel(&ioim->iosp->reqq_wait); |
| 402 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort, |
| 403 | ioim); |
| 404 | break; |
| 405 | |
| 406 | case BFA_IOIM_SM_CLEANUP: |
| 407 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 408 | bfa_reqq_wcancel(&ioim->iosp->reqq_wait); |
| 409 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed, |
| 410 | ioim); |
| 411 | bfa_ioim_notify_cleanup(ioim); |
| 412 | break; |
| 413 | |
| 414 | case BFA_IOIM_SM_HWFAIL: |
| 415 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 416 | bfa_reqq_wcancel(&ioim->iosp->reqq_wait); |
| 417 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed, |
| 418 | ioim); |
| 419 | break; |
| 420 | |
| 421 | default: |
Krishna Gudipati | e641de3 | 2010-03-05 19:35:02 -0800 | [diff] [blame^] | 422 | bfa_sm_fault(ioim->bfa, event); |
Jing Huang | 7725ccf | 2009-09-23 17:46:15 -0700 | [diff] [blame] | 423 | } |
| 424 | } |
| 425 | |
| 426 | /** |
| 427 | * Active IO is being aborted, waiting for room in request CQ. |
| 428 | */ |
| 429 | static void |
| 430 | bfa_ioim_sm_abort_qfull(struct bfa_ioim_s *ioim, enum bfa_ioim_event event) |
| 431 | { |
| 432 | bfa_trc(ioim->bfa, ioim->iotag); |
| 433 | bfa_trc(ioim->bfa, event); |
| 434 | |
| 435 | switch (event) { |
| 436 | case BFA_IOIM_SM_QRESUME: |
| 437 | bfa_sm_set_state(ioim, bfa_ioim_sm_abort); |
| 438 | bfa_ioim_send_abort(ioim); |
| 439 | break; |
| 440 | |
| 441 | case BFA_IOIM_SM_CLEANUP: |
| 442 | bfa_assert(ioim->iosp->abort_explicit == BFA_TRUE); |
| 443 | ioim->iosp->abort_explicit = BFA_FALSE; |
| 444 | bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup_qfull); |
| 445 | break; |
| 446 | |
| 447 | case BFA_IOIM_SM_COMP_GOOD: |
| 448 | case BFA_IOIM_SM_COMP: |
| 449 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 450 | bfa_reqq_wcancel(&ioim->iosp->reqq_wait); |
| 451 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort, |
| 452 | ioim); |
| 453 | break; |
| 454 | |
| 455 | case BFA_IOIM_SM_DONE: |
| 456 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free); |
| 457 | bfa_reqq_wcancel(&ioim->iosp->reqq_wait); |
| 458 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort, |
| 459 | ioim); |
| 460 | break; |
| 461 | |
| 462 | case BFA_IOIM_SM_HWFAIL: |
| 463 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 464 | bfa_reqq_wcancel(&ioim->iosp->reqq_wait); |
| 465 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed, |
| 466 | ioim); |
| 467 | break; |
| 468 | |
| 469 | default: |
Krishna Gudipati | e641de3 | 2010-03-05 19:35:02 -0800 | [diff] [blame^] | 470 | bfa_sm_fault(ioim->bfa, event); |
Jing Huang | 7725ccf | 2009-09-23 17:46:15 -0700 | [diff] [blame] | 471 | } |
| 472 | } |
| 473 | |
| 474 | /** |
| 475 | * Active IO is being cleaned up, waiting for room in request CQ. |
| 476 | */ |
| 477 | static void |
| 478 | bfa_ioim_sm_cleanup_qfull(struct bfa_ioim_s *ioim, enum bfa_ioim_event event) |
| 479 | { |
| 480 | bfa_trc(ioim->bfa, ioim->iotag); |
| 481 | bfa_trc(ioim->bfa, event); |
| 482 | |
| 483 | switch (event) { |
| 484 | case BFA_IOIM_SM_QRESUME: |
| 485 | bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup); |
| 486 | bfa_ioim_send_abort(ioim); |
| 487 | break; |
| 488 | |
| 489 | case BFA_IOIM_SM_ABORT: |
| 490 | /** |
| 491 | * IO is alraedy being cleaned up implicitly |
| 492 | */ |
| 493 | ioim->io_cbfn = __bfa_cb_ioim_abort; |
| 494 | break; |
| 495 | |
| 496 | case BFA_IOIM_SM_COMP_GOOD: |
| 497 | case BFA_IOIM_SM_COMP: |
| 498 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 499 | bfa_reqq_wcancel(&ioim->iosp->reqq_wait); |
| 500 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim); |
| 501 | bfa_ioim_notify_cleanup(ioim); |
| 502 | break; |
| 503 | |
| 504 | case BFA_IOIM_SM_DONE: |
| 505 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free); |
| 506 | bfa_reqq_wcancel(&ioim->iosp->reqq_wait); |
| 507 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim); |
| 508 | bfa_ioim_notify_cleanup(ioim); |
| 509 | break; |
| 510 | |
| 511 | case BFA_IOIM_SM_HWFAIL: |
| 512 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 513 | bfa_reqq_wcancel(&ioim->iosp->reqq_wait); |
| 514 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed, |
| 515 | ioim); |
| 516 | break; |
| 517 | |
| 518 | default: |
Krishna Gudipati | e641de3 | 2010-03-05 19:35:02 -0800 | [diff] [blame^] | 519 | bfa_sm_fault(ioim->bfa, event); |
Jing Huang | 7725ccf | 2009-09-23 17:46:15 -0700 | [diff] [blame] | 520 | } |
| 521 | } |
| 522 | |
| 523 | /** |
| 524 | * IO bfa callback is pending. |
| 525 | */ |
| 526 | static void |
| 527 | bfa_ioim_sm_hcb(struct bfa_ioim_s *ioim, enum bfa_ioim_event event) |
| 528 | { |
| 529 | bfa_trc_fp(ioim->bfa, ioim->iotag); |
| 530 | bfa_trc_fp(ioim->bfa, event); |
| 531 | |
| 532 | switch (event) { |
| 533 | case BFA_IOIM_SM_HCB: |
| 534 | bfa_sm_set_state(ioim, bfa_ioim_sm_uninit); |
| 535 | bfa_ioim_free(ioim); |
| 536 | bfa_cb_ioim_resfree(ioim->bfa->bfad); |
| 537 | break; |
| 538 | |
| 539 | case BFA_IOIM_SM_CLEANUP: |
| 540 | bfa_ioim_notify_cleanup(ioim); |
| 541 | break; |
| 542 | |
| 543 | case BFA_IOIM_SM_HWFAIL: |
| 544 | break; |
| 545 | |
| 546 | default: |
Krishna Gudipati | e641de3 | 2010-03-05 19:35:02 -0800 | [diff] [blame^] | 547 | bfa_sm_fault(ioim->bfa, event); |
Jing Huang | 7725ccf | 2009-09-23 17:46:15 -0700 | [diff] [blame] | 548 | } |
| 549 | } |
| 550 | |
| 551 | /** |
| 552 | * IO bfa callback is pending. IO resource cannot be freed. |
| 553 | */ |
| 554 | static void |
| 555 | bfa_ioim_sm_hcb_free(struct bfa_ioim_s *ioim, enum bfa_ioim_event event) |
| 556 | { |
| 557 | bfa_trc(ioim->bfa, ioim->iotag); |
| 558 | bfa_trc(ioim->bfa, event); |
| 559 | |
| 560 | switch (event) { |
| 561 | case BFA_IOIM_SM_HCB: |
| 562 | bfa_sm_set_state(ioim, bfa_ioim_sm_resfree); |
| 563 | list_del(&ioim->qe); |
| 564 | list_add_tail(&ioim->qe, &ioim->fcpim->ioim_resfree_q); |
| 565 | break; |
| 566 | |
| 567 | case BFA_IOIM_SM_FREE: |
| 568 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 569 | break; |
| 570 | |
| 571 | case BFA_IOIM_SM_CLEANUP: |
| 572 | bfa_ioim_notify_cleanup(ioim); |
| 573 | break; |
| 574 | |
| 575 | case BFA_IOIM_SM_HWFAIL: |
| 576 | bfa_sm_set_state(ioim, bfa_ioim_sm_hcb); |
| 577 | break; |
| 578 | |
| 579 | default: |
Krishna Gudipati | e641de3 | 2010-03-05 19:35:02 -0800 | [diff] [blame^] | 580 | bfa_sm_fault(ioim->bfa, event); |
Jing Huang | 7725ccf | 2009-09-23 17:46:15 -0700 | [diff] [blame] | 581 | } |
| 582 | } |
| 583 | |
| 584 | /** |
| 585 | * IO is completed, waiting resource free from firmware. |
| 586 | */ |
| 587 | static void |
| 588 | bfa_ioim_sm_resfree(struct bfa_ioim_s *ioim, enum bfa_ioim_event event) |
| 589 | { |
| 590 | bfa_trc(ioim->bfa, ioim->iotag); |
| 591 | bfa_trc(ioim->bfa, event); |
| 592 | |
| 593 | switch (event) { |
| 594 | case BFA_IOIM_SM_FREE: |
| 595 | bfa_sm_set_state(ioim, bfa_ioim_sm_uninit); |
| 596 | bfa_ioim_free(ioim); |
| 597 | bfa_cb_ioim_resfree(ioim->bfa->bfad); |
| 598 | break; |
| 599 | |
| 600 | case BFA_IOIM_SM_CLEANUP: |
| 601 | bfa_ioim_notify_cleanup(ioim); |
| 602 | break; |
| 603 | |
| 604 | case BFA_IOIM_SM_HWFAIL: |
| 605 | break; |
| 606 | |
| 607 | default: |
Krishna Gudipati | e641de3 | 2010-03-05 19:35:02 -0800 | [diff] [blame^] | 608 | bfa_sm_fault(ioim->bfa, event); |
Jing Huang | 7725ccf | 2009-09-23 17:46:15 -0700 | [diff] [blame] | 609 | } |
| 610 | } |
| 611 | |
| 612 | |
| 613 | |
| 614 | /** |
| 615 | * bfa_ioim_private |
| 616 | */ |
| 617 | |
| 618 | static void |
| 619 | __bfa_cb_ioim_good_comp(void *cbarg, bfa_boolean_t complete) |
| 620 | { |
| 621 | struct bfa_ioim_s *ioim = cbarg; |
| 622 | |
| 623 | if (!complete) { |
| 624 | bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB); |
| 625 | return; |
| 626 | } |
| 627 | |
| 628 | bfa_cb_ioim_good_comp(ioim->bfa->bfad, ioim->dio); |
| 629 | } |
| 630 | |
| 631 | static void |
| 632 | __bfa_cb_ioim_comp(void *cbarg, bfa_boolean_t complete) |
| 633 | { |
| 634 | struct bfa_ioim_s *ioim = cbarg; |
| 635 | struct bfi_ioim_rsp_s *m; |
| 636 | u8 *snsinfo = NULL; |
| 637 | u8 sns_len = 0; |
| 638 | s32 residue = 0; |
| 639 | |
| 640 | if (!complete) { |
| 641 | bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB); |
| 642 | return; |
| 643 | } |
| 644 | |
| 645 | m = (struct bfi_ioim_rsp_s *) &ioim->iosp->comp_rspmsg; |
| 646 | if (m->io_status == BFI_IOIM_STS_OK) { |
| 647 | /** |
| 648 | * setup sense information, if present |
| 649 | */ |
| 650 | if (m->scsi_status == SCSI_STATUS_CHECK_CONDITION |
| 651 | && m->sns_len) { |
| 652 | sns_len = m->sns_len; |
| 653 | snsinfo = ioim->iosp->snsinfo; |
| 654 | } |
| 655 | |
| 656 | /** |
| 657 | * setup residue value correctly for normal completions |
| 658 | */ |
| 659 | if (m->resid_flags == FCP_RESID_UNDER) |
| 660 | residue = bfa_os_ntohl(m->residue); |
| 661 | if (m->resid_flags == FCP_RESID_OVER) { |
| 662 | residue = bfa_os_ntohl(m->residue); |
| 663 | residue = -residue; |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, m->io_status, |
| 668 | m->scsi_status, sns_len, snsinfo, residue); |
| 669 | } |
| 670 | |
| 671 | static void |
| 672 | __bfa_cb_ioim_failed(void *cbarg, bfa_boolean_t complete) |
| 673 | { |
| 674 | struct bfa_ioim_s *ioim = cbarg; |
| 675 | |
| 676 | if (!complete) { |
| 677 | bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB); |
| 678 | return; |
| 679 | } |
| 680 | |
| 681 | bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, BFI_IOIM_STS_ABORTED, |
| 682 | 0, 0, NULL, 0); |
| 683 | } |
| 684 | |
| 685 | static void |
| 686 | __bfa_cb_ioim_pathtov(void *cbarg, bfa_boolean_t complete) |
| 687 | { |
| 688 | struct bfa_ioim_s *ioim = cbarg; |
| 689 | |
| 690 | if (!complete) { |
| 691 | bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB); |
| 692 | return; |
| 693 | } |
| 694 | |
| 695 | bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, BFI_IOIM_STS_PATHTOV, |
| 696 | 0, 0, NULL, 0); |
| 697 | } |
| 698 | |
| 699 | static void |
| 700 | __bfa_cb_ioim_abort(void *cbarg, bfa_boolean_t complete) |
| 701 | { |
| 702 | struct bfa_ioim_s *ioim = cbarg; |
| 703 | |
| 704 | if (!complete) { |
| 705 | bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB); |
| 706 | return; |
| 707 | } |
| 708 | |
| 709 | bfa_cb_ioim_abort(ioim->bfa->bfad, ioim->dio); |
| 710 | } |
| 711 | |
| 712 | static void |
| 713 | bfa_ioim_sgpg_alloced(void *cbarg) |
| 714 | { |
| 715 | struct bfa_ioim_s *ioim = cbarg; |
| 716 | |
| 717 | ioim->nsgpgs = BFA_SGPG_NPAGE(ioim->nsges); |
| 718 | list_splice_tail_init(&ioim->iosp->sgpg_wqe.sgpg_q, &ioim->sgpg_q); |
| 719 | bfa_ioim_sgpg_setup(ioim); |
| 720 | bfa_sm_send_event(ioim, BFA_IOIM_SM_SGALLOCED); |
| 721 | } |
| 722 | |
| 723 | /** |
| 724 | * Send I/O request to firmware. |
| 725 | */ |
| 726 | static bfa_boolean_t |
| 727 | bfa_ioim_send_ioreq(struct bfa_ioim_s *ioim) |
| 728 | { |
| 729 | struct bfa_itnim_s *itnim = ioim->itnim; |
| 730 | struct bfi_ioim_req_s *m; |
| 731 | static struct fcp_cmnd_s cmnd_z0 = { 0 }; |
| 732 | struct bfi_sge_s *sge; |
| 733 | u32 pgdlen = 0; |
| 734 | |
| 735 | /** |
| 736 | * check for room in queue to send request now |
| 737 | */ |
| 738 | m = bfa_reqq_next(ioim->bfa, itnim->reqq); |
| 739 | if (!m) { |
| 740 | bfa_reqq_wait(ioim->bfa, ioim->itnim->reqq, |
| 741 | &ioim->iosp->reqq_wait); |
| 742 | return BFA_FALSE; |
| 743 | } |
| 744 | |
| 745 | /** |
| 746 | * build i/o request message next |
| 747 | */ |
| 748 | m->io_tag = bfa_os_htons(ioim->iotag); |
| 749 | m->rport_hdl = ioim->itnim->rport->fw_handle; |
| 750 | m->io_timeout = bfa_cb_ioim_get_timeout(ioim->dio); |
| 751 | |
| 752 | /** |
| 753 | * build inline IO SG element here |
| 754 | */ |
| 755 | sge = &m->sges[0]; |
| 756 | if (ioim->nsges) { |
| 757 | sge->sga = bfa_cb_ioim_get_sgaddr(ioim->dio, 0); |
| 758 | pgdlen = bfa_cb_ioim_get_sglen(ioim->dio, 0); |
| 759 | sge->sg_len = pgdlen; |
| 760 | sge->flags = (ioim->nsges > BFI_SGE_INLINE) ? |
| 761 | BFI_SGE_DATA_CPL : BFI_SGE_DATA_LAST; |
| 762 | bfa_sge_to_be(sge); |
| 763 | sge++; |
| 764 | } |
| 765 | |
| 766 | if (ioim->nsges > BFI_SGE_INLINE) { |
| 767 | sge->sga = ioim->sgpg->sgpg_pa; |
| 768 | } else { |
| 769 | sge->sga.a32.addr_lo = 0; |
| 770 | sge->sga.a32.addr_hi = 0; |
| 771 | } |
| 772 | sge->sg_len = pgdlen; |
| 773 | sge->flags = BFI_SGE_PGDLEN; |
| 774 | bfa_sge_to_be(sge); |
| 775 | |
| 776 | /** |
| 777 | * set up I/O command parameters |
| 778 | */ |
| 779 | bfa_os_assign(m->cmnd, cmnd_z0); |
| 780 | m->cmnd.lun = bfa_cb_ioim_get_lun(ioim->dio); |
| 781 | m->cmnd.iodir = bfa_cb_ioim_get_iodir(ioim->dio); |
| 782 | bfa_os_assign(m->cmnd.cdb, |
| 783 | *(struct scsi_cdb_s *)bfa_cb_ioim_get_cdb(ioim->dio)); |
| 784 | m->cmnd.fcp_dl = bfa_os_htonl(bfa_cb_ioim_get_size(ioim->dio)); |
| 785 | |
| 786 | /** |
| 787 | * set up I/O message header |
| 788 | */ |
| 789 | switch (m->cmnd.iodir) { |
| 790 | case FCP_IODIR_READ: |
| 791 | bfi_h2i_set(m->mh, BFI_MC_IOIM_READ, 0, bfa_lpuid(ioim->bfa)); |
| 792 | bfa_stats(itnim, input_reqs); |
| 793 | break; |
| 794 | case FCP_IODIR_WRITE: |
| 795 | bfi_h2i_set(m->mh, BFI_MC_IOIM_WRITE, 0, bfa_lpuid(ioim->bfa)); |
| 796 | bfa_stats(itnim, output_reqs); |
| 797 | break; |
| 798 | case FCP_IODIR_RW: |
| 799 | bfa_stats(itnim, input_reqs); |
| 800 | bfa_stats(itnim, output_reqs); |
| 801 | default: |
| 802 | bfi_h2i_set(m->mh, BFI_MC_IOIM_IO, 0, bfa_lpuid(ioim->bfa)); |
| 803 | } |
| 804 | if (itnim->seq_rec || |
| 805 | (bfa_cb_ioim_get_size(ioim->dio) & (sizeof(u32) - 1))) |
| 806 | bfi_h2i_set(m->mh, BFI_MC_IOIM_IO, 0, bfa_lpuid(ioim->bfa)); |
| 807 | |
| 808 | #ifdef IOIM_ADVANCED |
| 809 | m->cmnd.crn = bfa_cb_ioim_get_crn(ioim->dio); |
| 810 | m->cmnd.priority = bfa_cb_ioim_get_priority(ioim->dio); |
| 811 | m->cmnd.taskattr = bfa_cb_ioim_get_taskattr(ioim->dio); |
| 812 | |
| 813 | /** |
| 814 | * Handle large CDB (>16 bytes). |
| 815 | */ |
| 816 | m->cmnd.addl_cdb_len = (bfa_cb_ioim_get_cdblen(ioim->dio) - |
| 817 | FCP_CMND_CDB_LEN) / sizeof(u32); |
| 818 | if (m->cmnd.addl_cdb_len) { |
| 819 | bfa_os_memcpy(&m->cmnd.cdb + 1, (struct scsi_cdb_s *) |
| 820 | bfa_cb_ioim_get_cdb(ioim->dio) + 1, |
| 821 | m->cmnd.addl_cdb_len * sizeof(u32)); |
| 822 | fcp_cmnd_fcpdl(&m->cmnd) = |
| 823 | bfa_os_htonl(bfa_cb_ioim_get_size(ioim->dio)); |
| 824 | } |
| 825 | #endif |
| 826 | |
| 827 | /** |
| 828 | * queue I/O message to firmware |
| 829 | */ |
| 830 | bfa_reqq_produce(ioim->bfa, itnim->reqq); |
| 831 | return BFA_TRUE; |
| 832 | } |
| 833 | |
| 834 | /** |
| 835 | * Setup any additional SG pages needed.Inline SG element is setup |
| 836 | * at queuing time. |
| 837 | */ |
| 838 | static bfa_boolean_t |
| 839 | bfa_ioim_sge_setup(struct bfa_ioim_s *ioim) |
| 840 | { |
| 841 | u16 nsgpgs; |
| 842 | |
| 843 | bfa_assert(ioim->nsges > BFI_SGE_INLINE); |
| 844 | |
| 845 | /** |
| 846 | * allocate SG pages needed |
| 847 | */ |
| 848 | nsgpgs = BFA_SGPG_NPAGE(ioim->nsges); |
| 849 | if (!nsgpgs) |
| 850 | return BFA_TRUE; |
| 851 | |
| 852 | if (bfa_sgpg_malloc(ioim->bfa, &ioim->sgpg_q, nsgpgs) |
| 853 | != BFA_STATUS_OK) { |
| 854 | bfa_sgpg_wait(ioim->bfa, &ioim->iosp->sgpg_wqe, nsgpgs); |
| 855 | return BFA_FALSE; |
| 856 | } |
| 857 | |
| 858 | ioim->nsgpgs = nsgpgs; |
| 859 | bfa_ioim_sgpg_setup(ioim); |
| 860 | |
| 861 | return BFA_TRUE; |
| 862 | } |
| 863 | |
| 864 | static void |
| 865 | bfa_ioim_sgpg_setup(struct bfa_ioim_s *ioim) |
| 866 | { |
| 867 | int sgeid, nsges, i; |
| 868 | struct bfi_sge_s *sge; |
| 869 | struct bfa_sgpg_s *sgpg; |
| 870 | u32 pgcumsz; |
| 871 | |
| 872 | sgeid = BFI_SGE_INLINE; |
| 873 | ioim->sgpg = sgpg = bfa_q_first(&ioim->sgpg_q); |
| 874 | |
| 875 | do { |
| 876 | sge = sgpg->sgpg->sges; |
| 877 | nsges = ioim->nsges - sgeid; |
| 878 | if (nsges > BFI_SGPG_DATA_SGES) |
| 879 | nsges = BFI_SGPG_DATA_SGES; |
| 880 | |
| 881 | pgcumsz = 0; |
| 882 | for (i = 0; i < nsges; i++, sge++, sgeid++) { |
| 883 | sge->sga = bfa_cb_ioim_get_sgaddr(ioim->dio, sgeid); |
| 884 | sge->sg_len = bfa_cb_ioim_get_sglen(ioim->dio, sgeid); |
| 885 | pgcumsz += sge->sg_len; |
| 886 | |
| 887 | /** |
| 888 | * set flags |
| 889 | */ |
| 890 | if (i < (nsges - 1)) |
| 891 | sge->flags = BFI_SGE_DATA; |
| 892 | else if (sgeid < (ioim->nsges - 1)) |
| 893 | sge->flags = BFI_SGE_DATA_CPL; |
| 894 | else |
| 895 | sge->flags = BFI_SGE_DATA_LAST; |
| 896 | } |
| 897 | |
| 898 | sgpg = (struct bfa_sgpg_s *) bfa_q_next(sgpg); |
| 899 | |
| 900 | /** |
| 901 | * set the link element of each page |
| 902 | */ |
| 903 | if (sgeid == ioim->nsges) { |
| 904 | sge->flags = BFI_SGE_PGDLEN; |
| 905 | sge->sga.a32.addr_lo = 0; |
| 906 | sge->sga.a32.addr_hi = 0; |
| 907 | } else { |
| 908 | sge->flags = BFI_SGE_LINK; |
| 909 | sge->sga = sgpg->sgpg_pa; |
| 910 | } |
| 911 | sge->sg_len = pgcumsz; |
| 912 | } while (sgeid < ioim->nsges); |
| 913 | } |
| 914 | |
| 915 | /** |
| 916 | * Send I/O abort request to firmware. |
| 917 | */ |
| 918 | static bfa_boolean_t |
| 919 | bfa_ioim_send_abort(struct bfa_ioim_s *ioim) |
| 920 | { |
| 921 | struct bfa_itnim_s *itnim = ioim->itnim; |
| 922 | struct bfi_ioim_abort_req_s *m; |
| 923 | enum bfi_ioim_h2i msgop; |
| 924 | |
| 925 | /** |
| 926 | * check for room in queue to send request now |
| 927 | */ |
| 928 | m = bfa_reqq_next(ioim->bfa, itnim->reqq); |
| 929 | if (!m) |
| 930 | return BFA_FALSE; |
| 931 | |
| 932 | /** |
| 933 | * build i/o request message next |
| 934 | */ |
| 935 | if (ioim->iosp->abort_explicit) |
| 936 | msgop = BFI_IOIM_H2I_IOABORT_REQ; |
| 937 | else |
| 938 | msgop = BFI_IOIM_H2I_IOCLEANUP_REQ; |
| 939 | |
| 940 | bfi_h2i_set(m->mh, BFI_MC_IOIM, msgop, bfa_lpuid(ioim->bfa)); |
| 941 | m->io_tag = bfa_os_htons(ioim->iotag); |
| 942 | m->abort_tag = ++ioim->abort_tag; |
| 943 | |
| 944 | /** |
| 945 | * queue I/O message to firmware |
| 946 | */ |
| 947 | bfa_reqq_produce(ioim->bfa, itnim->reqq); |
| 948 | return BFA_TRUE; |
| 949 | } |
| 950 | |
| 951 | /** |
| 952 | * Call to resume any I/O requests waiting for room in request queue. |
| 953 | */ |
| 954 | static void |
| 955 | bfa_ioim_qresume(void *cbarg) |
| 956 | { |
| 957 | struct bfa_ioim_s *ioim = cbarg; |
| 958 | |
| 959 | bfa_fcpim_stats(ioim->fcpim, qresumes); |
| 960 | bfa_sm_send_event(ioim, BFA_IOIM_SM_QRESUME); |
| 961 | } |
| 962 | |
| 963 | |
| 964 | static void |
| 965 | bfa_ioim_notify_cleanup(struct bfa_ioim_s *ioim) |
| 966 | { |
| 967 | /** |
| 968 | * Move IO from itnim queue to fcpim global queue since itnim will be |
| 969 | * freed. |
| 970 | */ |
| 971 | list_del(&ioim->qe); |
| 972 | list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q); |
| 973 | |
| 974 | if (!ioim->iosp->tskim) { |
| 975 | if (ioim->fcpim->delay_comp && ioim->itnim->iotov_active) { |
| 976 | bfa_cb_dequeue(&ioim->hcb_qe); |
| 977 | list_del(&ioim->qe); |
| 978 | list_add_tail(&ioim->qe, &ioim->itnim->delay_comp_q); |
| 979 | } |
| 980 | bfa_itnim_iodone(ioim->itnim); |
| 981 | } else |
| 982 | bfa_tskim_iodone(ioim->iosp->tskim); |
| 983 | } |
| 984 | |
| 985 | /** |
| 986 | * or after the link comes back. |
| 987 | */ |
| 988 | void |
| 989 | bfa_ioim_delayed_comp(struct bfa_ioim_s *ioim, bfa_boolean_t iotov) |
| 990 | { |
| 991 | /** |
| 992 | * If path tov timer expired, failback with PATHTOV status - these |
| 993 | * IO requests are not normally retried by IO stack. |
| 994 | * |
| 995 | * Otherwise device cameback online and fail it with normal failed |
| 996 | * status so that IO stack retries these failed IO requests. |
| 997 | */ |
| 998 | if (iotov) |
| 999 | ioim->io_cbfn = __bfa_cb_ioim_pathtov; |
| 1000 | else |
| 1001 | ioim->io_cbfn = __bfa_cb_ioim_failed; |
| 1002 | |
| 1003 | bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim); |
| 1004 | |
| 1005 | /** |
| 1006 | * Move IO to fcpim global queue since itnim will be |
| 1007 | * freed. |
| 1008 | */ |
| 1009 | list_del(&ioim->qe); |
| 1010 | list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q); |
| 1011 | } |
| 1012 | |
| 1013 | |
| 1014 | |
| 1015 | /** |
| 1016 | * bfa_ioim_friend |
| 1017 | */ |
| 1018 | |
| 1019 | /** |
| 1020 | * Memory allocation and initialization. |
| 1021 | */ |
| 1022 | void |
| 1023 | bfa_ioim_attach(struct bfa_fcpim_mod_s *fcpim, struct bfa_meminfo_s *minfo) |
| 1024 | { |
| 1025 | struct bfa_ioim_s *ioim; |
| 1026 | struct bfa_ioim_sp_s *iosp; |
| 1027 | u16 i; |
| 1028 | u8 *snsinfo; |
| 1029 | u32 snsbufsz; |
| 1030 | |
| 1031 | /** |
| 1032 | * claim memory first |
| 1033 | */ |
| 1034 | ioim = (struct bfa_ioim_s *) bfa_meminfo_kva(minfo); |
| 1035 | fcpim->ioim_arr = ioim; |
| 1036 | bfa_meminfo_kva(minfo) = (u8 *) (ioim + fcpim->num_ioim_reqs); |
| 1037 | |
| 1038 | iosp = (struct bfa_ioim_sp_s *) bfa_meminfo_kva(minfo); |
| 1039 | fcpim->ioim_sp_arr = iosp; |
| 1040 | bfa_meminfo_kva(minfo) = (u8 *) (iosp + fcpim->num_ioim_reqs); |
| 1041 | |
| 1042 | /** |
| 1043 | * Claim DMA memory for per IO sense data. |
| 1044 | */ |
| 1045 | snsbufsz = fcpim->num_ioim_reqs * BFI_IOIM_SNSLEN; |
| 1046 | fcpim->snsbase.pa = bfa_meminfo_dma_phys(minfo); |
| 1047 | bfa_meminfo_dma_phys(minfo) += snsbufsz; |
| 1048 | |
| 1049 | fcpim->snsbase.kva = bfa_meminfo_dma_virt(minfo); |
| 1050 | bfa_meminfo_dma_virt(minfo) += snsbufsz; |
| 1051 | snsinfo = fcpim->snsbase.kva; |
| 1052 | bfa_iocfc_set_snsbase(fcpim->bfa, fcpim->snsbase.pa); |
| 1053 | |
| 1054 | /** |
| 1055 | * Initialize ioim free queues |
| 1056 | */ |
| 1057 | INIT_LIST_HEAD(&fcpim->ioim_free_q); |
| 1058 | INIT_LIST_HEAD(&fcpim->ioim_resfree_q); |
| 1059 | INIT_LIST_HEAD(&fcpim->ioim_comp_q); |
| 1060 | |
| 1061 | for (i = 0; i < fcpim->num_ioim_reqs; |
| 1062 | i++, ioim++, iosp++, snsinfo += BFI_IOIM_SNSLEN) { |
| 1063 | /* |
| 1064 | * initialize IOIM |
| 1065 | */ |
| 1066 | bfa_os_memset(ioim, 0, sizeof(struct bfa_ioim_s)); |
| 1067 | ioim->iotag = i; |
| 1068 | ioim->bfa = fcpim->bfa; |
| 1069 | ioim->fcpim = fcpim; |
| 1070 | ioim->iosp = iosp; |
| 1071 | iosp->snsinfo = snsinfo; |
| 1072 | INIT_LIST_HEAD(&ioim->sgpg_q); |
| 1073 | bfa_reqq_winit(&ioim->iosp->reqq_wait, |
| 1074 | bfa_ioim_qresume, ioim); |
| 1075 | bfa_sgpg_winit(&ioim->iosp->sgpg_wqe, |
| 1076 | bfa_ioim_sgpg_alloced, ioim); |
| 1077 | bfa_sm_set_state(ioim, bfa_ioim_sm_uninit); |
| 1078 | |
| 1079 | list_add_tail(&ioim->qe, &fcpim->ioim_free_q); |
| 1080 | } |
| 1081 | } |
| 1082 | |
| 1083 | /** |
| 1084 | * Driver detach time call. |
| 1085 | */ |
| 1086 | void |
| 1087 | bfa_ioim_detach(struct bfa_fcpim_mod_s *fcpim) |
| 1088 | { |
| 1089 | } |
| 1090 | |
| 1091 | void |
| 1092 | bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *m) |
| 1093 | { |
| 1094 | struct bfa_fcpim_mod_s *fcpim = BFA_FCPIM_MOD(bfa); |
| 1095 | struct bfi_ioim_rsp_s *rsp = (struct bfi_ioim_rsp_s *) m; |
| 1096 | struct bfa_ioim_s *ioim; |
| 1097 | u16 iotag; |
| 1098 | enum bfa_ioim_event evt = BFA_IOIM_SM_COMP; |
| 1099 | |
| 1100 | iotag = bfa_os_ntohs(rsp->io_tag); |
| 1101 | |
| 1102 | ioim = BFA_IOIM_FROM_TAG(fcpim, iotag); |
| 1103 | bfa_assert(ioim->iotag == iotag); |
| 1104 | |
| 1105 | bfa_trc(ioim->bfa, ioim->iotag); |
| 1106 | bfa_trc(ioim->bfa, rsp->io_status); |
| 1107 | bfa_trc(ioim->bfa, rsp->reuse_io_tag); |
| 1108 | |
| 1109 | if (bfa_sm_cmp_state(ioim, bfa_ioim_sm_active)) |
| 1110 | bfa_os_assign(ioim->iosp->comp_rspmsg, *m); |
| 1111 | |
| 1112 | switch (rsp->io_status) { |
| 1113 | case BFI_IOIM_STS_OK: |
| 1114 | bfa_fcpim_stats(fcpim, iocomp_ok); |
| 1115 | if (rsp->reuse_io_tag == 0) |
| 1116 | evt = BFA_IOIM_SM_DONE; |
| 1117 | else |
| 1118 | evt = BFA_IOIM_SM_COMP; |
| 1119 | break; |
| 1120 | |
| 1121 | case BFI_IOIM_STS_TIMEDOUT: |
| 1122 | case BFI_IOIM_STS_ABORTED: |
| 1123 | rsp->io_status = BFI_IOIM_STS_ABORTED; |
| 1124 | bfa_fcpim_stats(fcpim, iocomp_aborted); |
| 1125 | if (rsp->reuse_io_tag == 0) |
| 1126 | evt = BFA_IOIM_SM_DONE; |
| 1127 | else |
| 1128 | evt = BFA_IOIM_SM_COMP; |
| 1129 | break; |
| 1130 | |
| 1131 | case BFI_IOIM_STS_PROTO_ERR: |
| 1132 | bfa_fcpim_stats(fcpim, iocom_proto_err); |
| 1133 | bfa_assert(rsp->reuse_io_tag); |
| 1134 | evt = BFA_IOIM_SM_COMP; |
| 1135 | break; |
| 1136 | |
| 1137 | case BFI_IOIM_STS_SQER_NEEDED: |
| 1138 | bfa_fcpim_stats(fcpim, iocom_sqer_needed); |
| 1139 | bfa_assert(rsp->reuse_io_tag == 0); |
| 1140 | evt = BFA_IOIM_SM_SQRETRY; |
| 1141 | break; |
| 1142 | |
| 1143 | case BFI_IOIM_STS_RES_FREE: |
| 1144 | bfa_fcpim_stats(fcpim, iocom_res_free); |
| 1145 | evt = BFA_IOIM_SM_FREE; |
| 1146 | break; |
| 1147 | |
| 1148 | case BFI_IOIM_STS_HOST_ABORTED: |
| 1149 | bfa_fcpim_stats(fcpim, iocom_hostabrts); |
| 1150 | if (rsp->abort_tag != ioim->abort_tag) { |
| 1151 | bfa_trc(ioim->bfa, rsp->abort_tag); |
| 1152 | bfa_trc(ioim->bfa, ioim->abort_tag); |
| 1153 | return; |
| 1154 | } |
| 1155 | |
| 1156 | if (rsp->reuse_io_tag) |
| 1157 | evt = BFA_IOIM_SM_ABORT_COMP; |
| 1158 | else |
| 1159 | evt = BFA_IOIM_SM_ABORT_DONE; |
| 1160 | break; |
| 1161 | |
| 1162 | case BFI_IOIM_STS_UTAG: |
| 1163 | bfa_fcpim_stats(fcpim, iocom_utags); |
| 1164 | evt = BFA_IOIM_SM_COMP_UTAG; |
| 1165 | break; |
| 1166 | |
| 1167 | default: |
| 1168 | bfa_assert(0); |
| 1169 | } |
| 1170 | |
| 1171 | bfa_sm_send_event(ioim, evt); |
| 1172 | } |
| 1173 | |
| 1174 | void |
| 1175 | bfa_ioim_good_comp_isr(struct bfa_s *bfa, struct bfi_msg_s *m) |
| 1176 | { |
| 1177 | struct bfa_fcpim_mod_s *fcpim = BFA_FCPIM_MOD(bfa); |
| 1178 | struct bfi_ioim_rsp_s *rsp = (struct bfi_ioim_rsp_s *) m; |
| 1179 | struct bfa_ioim_s *ioim; |
| 1180 | u16 iotag; |
| 1181 | |
| 1182 | iotag = bfa_os_ntohs(rsp->io_tag); |
| 1183 | |
| 1184 | ioim = BFA_IOIM_FROM_TAG(fcpim, iotag); |
| 1185 | bfa_assert(ioim->iotag == iotag); |
| 1186 | |
| 1187 | bfa_trc_fp(ioim->bfa, ioim->iotag); |
| 1188 | bfa_sm_send_event(ioim, BFA_IOIM_SM_COMP_GOOD); |
| 1189 | } |
| 1190 | |
| 1191 | /** |
| 1192 | * Called by itnim to clean up IO while going offline. |
| 1193 | */ |
| 1194 | void |
| 1195 | bfa_ioim_cleanup(struct bfa_ioim_s *ioim) |
| 1196 | { |
| 1197 | bfa_trc(ioim->bfa, ioim->iotag); |
| 1198 | bfa_fcpim_stats(ioim->fcpim, io_cleanups); |
| 1199 | |
| 1200 | ioim->iosp->tskim = NULL; |
| 1201 | bfa_sm_send_event(ioim, BFA_IOIM_SM_CLEANUP); |
| 1202 | } |
| 1203 | |
| 1204 | void |
| 1205 | bfa_ioim_cleanup_tm(struct bfa_ioim_s *ioim, struct bfa_tskim_s *tskim) |
| 1206 | { |
| 1207 | bfa_trc(ioim->bfa, ioim->iotag); |
| 1208 | bfa_fcpim_stats(ioim->fcpim, io_tmaborts); |
| 1209 | |
| 1210 | ioim->iosp->tskim = tskim; |
| 1211 | bfa_sm_send_event(ioim, BFA_IOIM_SM_CLEANUP); |
| 1212 | } |
| 1213 | |
| 1214 | /** |
| 1215 | * IOC failure handling. |
| 1216 | */ |
| 1217 | void |
| 1218 | bfa_ioim_iocdisable(struct bfa_ioim_s *ioim) |
| 1219 | { |
| 1220 | bfa_sm_send_event(ioim, BFA_IOIM_SM_HWFAIL); |
| 1221 | } |
| 1222 | |
| 1223 | /** |
| 1224 | * IO offline TOV popped. Fail the pending IO. |
| 1225 | */ |
| 1226 | void |
| 1227 | bfa_ioim_tov(struct bfa_ioim_s *ioim) |
| 1228 | { |
| 1229 | bfa_sm_send_event(ioim, BFA_IOIM_SM_IOTOV); |
| 1230 | } |
| 1231 | |
| 1232 | |
| 1233 | |
| 1234 | /** |
| 1235 | * bfa_ioim_api |
| 1236 | */ |
| 1237 | |
| 1238 | /** |
| 1239 | * Allocate IOIM resource for initiator mode I/O request. |
| 1240 | */ |
| 1241 | struct bfa_ioim_s * |
| 1242 | bfa_ioim_alloc(struct bfa_s *bfa, struct bfad_ioim_s *dio, |
| 1243 | struct bfa_itnim_s *itnim, u16 nsges) |
| 1244 | { |
| 1245 | struct bfa_fcpim_mod_s *fcpim = BFA_FCPIM_MOD(bfa); |
| 1246 | struct bfa_ioim_s *ioim; |
| 1247 | |
| 1248 | /** |
| 1249 | * alocate IOIM resource |
| 1250 | */ |
| 1251 | bfa_q_deq(&fcpim->ioim_free_q, &ioim); |
| 1252 | if (!ioim) { |
| 1253 | bfa_fcpim_stats(fcpim, no_iotags); |
| 1254 | return NULL; |
| 1255 | } |
| 1256 | |
| 1257 | ioim->dio = dio; |
| 1258 | ioim->itnim = itnim; |
| 1259 | ioim->nsges = nsges; |
| 1260 | ioim->nsgpgs = 0; |
| 1261 | |
| 1262 | bfa_stats(fcpim, total_ios); |
| 1263 | bfa_stats(itnim, ios); |
| 1264 | fcpim->ios_active++; |
| 1265 | |
| 1266 | list_add_tail(&ioim->qe, &itnim->io_q); |
| 1267 | bfa_trc_fp(ioim->bfa, ioim->iotag); |
| 1268 | |
| 1269 | return ioim; |
| 1270 | } |
| 1271 | |
| 1272 | void |
| 1273 | bfa_ioim_free(struct bfa_ioim_s *ioim) |
| 1274 | { |
| 1275 | struct bfa_fcpim_mod_s *fcpim = ioim->fcpim; |
| 1276 | |
| 1277 | bfa_trc_fp(ioim->bfa, ioim->iotag); |
| 1278 | bfa_assert_fp(bfa_sm_cmp_state(ioim, bfa_ioim_sm_uninit)); |
| 1279 | |
| 1280 | bfa_assert_fp(list_empty(&ioim->sgpg_q) |
| 1281 | || (ioim->nsges > BFI_SGE_INLINE)); |
| 1282 | |
| 1283 | if (ioim->nsgpgs > 0) |
| 1284 | bfa_sgpg_mfree(ioim->bfa, &ioim->sgpg_q, ioim->nsgpgs); |
| 1285 | |
| 1286 | bfa_stats(ioim->itnim, io_comps); |
| 1287 | fcpim->ios_active--; |
| 1288 | |
| 1289 | list_del(&ioim->qe); |
| 1290 | list_add_tail(&ioim->qe, &fcpim->ioim_free_q); |
| 1291 | } |
| 1292 | |
| 1293 | void |
| 1294 | bfa_ioim_start(struct bfa_ioim_s *ioim) |
| 1295 | { |
| 1296 | bfa_trc_fp(ioim->bfa, ioim->iotag); |
| 1297 | bfa_sm_send_event(ioim, BFA_IOIM_SM_START); |
| 1298 | } |
| 1299 | |
| 1300 | /** |
| 1301 | * Driver I/O abort request. |
| 1302 | */ |
| 1303 | void |
| 1304 | bfa_ioim_abort(struct bfa_ioim_s *ioim) |
| 1305 | { |
| 1306 | bfa_trc(ioim->bfa, ioim->iotag); |
| 1307 | bfa_fcpim_stats(ioim->fcpim, io_aborts); |
| 1308 | bfa_sm_send_event(ioim, BFA_IOIM_SM_ABORT); |
| 1309 | } |
| 1310 | |
| 1311 | |