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[ceph.git] / ceph / src / seastar / dpdk / drivers / net / qede / base / ecore_spq.c
1 /*
2 * Copyright (c) 2016 QLogic Corporation.
3 * All rights reserved.
4 * www.qlogic.com
5 *
6 * See LICENSE.qede_pmd for copyright and licensing details.
7 */
8
9 #include "bcm_osal.h"
10 #include "reg_addr.h"
11 #include "ecore_gtt_reg_addr.h"
12 #include "ecore_hsi_common.h"
13 #include "ecore.h"
14 #include "ecore_sp_api.h"
15 #include "ecore_spq.h"
16 #include "ecore_iro.h"
17 #include "ecore_init_fw_funcs.h"
18 #include "ecore_cxt.h"
19 #include "ecore_int.h"
20 #include "ecore_dev_api.h"
21 #include "ecore_mcp.h"
22 #include "ecore_hw.h"
23 #include "ecore_sriov.h"
24
25 /***************************************************************************
26 * Structures & Definitions
27 ***************************************************************************/
28
29 #define SPQ_HIGH_PRI_RESERVE_DEFAULT (1)
30
31 #define SPQ_BLOCK_DELAY_MAX_ITER (10)
32 #define SPQ_BLOCK_DELAY_US (10)
33 #define SPQ_BLOCK_SLEEP_MAX_ITER (1000)
34 #define SPQ_BLOCK_SLEEP_MS (5)
35
36 /***************************************************************************
37 * Blocking Imp. (BLOCK/EBLOCK mode)
38 ***************************************************************************/
39 static void ecore_spq_blocking_cb(struct ecore_hwfn *p_hwfn,
40 void *cookie,
41 union event_ring_data *data,
42 u8 fw_return_code)
43 {
44 struct ecore_spq_comp_done *comp_done;
45
46 comp_done = (struct ecore_spq_comp_done *)cookie;
47
48 comp_done->done = 0x1;
49 comp_done->fw_return_code = fw_return_code;
50
51 /* make update visible to waiting thread */
52 OSAL_SMP_WMB(p_hwfn->p_dev);
53 }
54
55 static enum _ecore_status_t __ecore_spq_block(struct ecore_hwfn *p_hwfn,
56 struct ecore_spq_entry *p_ent,
57 u8 *p_fw_ret,
58 bool sleep_between_iter)
59 {
60 struct ecore_spq_comp_done *comp_done;
61 u32 iter_cnt;
62
63 comp_done = (struct ecore_spq_comp_done *)p_ent->comp_cb.cookie;
64 iter_cnt = sleep_between_iter ? SPQ_BLOCK_SLEEP_MAX_ITER
65 : SPQ_BLOCK_DELAY_MAX_ITER;
66
67 while (iter_cnt--) {
68 OSAL_POLL_MODE_DPC(p_hwfn);
69 OSAL_SMP_RMB(p_hwfn->p_dev);
70 if (comp_done->done == 1) {
71 if (p_fw_ret)
72 *p_fw_ret = comp_done->fw_return_code;
73 return ECORE_SUCCESS;
74 }
75
76 if (sleep_between_iter)
77 OSAL_MSLEEP(SPQ_BLOCK_SLEEP_MS);
78 else
79 OSAL_UDELAY(SPQ_BLOCK_DELAY_US);
80 }
81
82 return ECORE_TIMEOUT;
83 }
84
85 static enum _ecore_status_t ecore_spq_block(struct ecore_hwfn *p_hwfn,
86 struct ecore_spq_entry *p_ent,
87 u8 *p_fw_ret, bool skip_quick_poll)
88 {
89 struct ecore_spq_comp_done *comp_done;
90 enum _ecore_status_t rc;
91
92 /* A relatively short polling period w/o sleeping, to allow the FW to
93 * complete the ramrod and thus possibly to avoid the following sleeps.
94 */
95 if (!skip_quick_poll) {
96 rc = __ecore_spq_block(p_hwfn, p_ent, p_fw_ret, false);
97 if (rc == ECORE_SUCCESS)
98 return ECORE_SUCCESS;
99 }
100
101 /* Move to polling with a sleeping period between iterations */
102 rc = __ecore_spq_block(p_hwfn, p_ent, p_fw_ret, true);
103 if (rc == ECORE_SUCCESS)
104 return ECORE_SUCCESS;
105
106 DP_INFO(p_hwfn, "Ramrod is stuck, requesting MCP drain\n");
107 rc = ecore_mcp_drain(p_hwfn, p_hwfn->p_main_ptt);
108 if (rc != ECORE_SUCCESS) {
109 DP_NOTICE(p_hwfn, true, "MCP drain failed\n");
110 goto err;
111 }
112
113 /* Retry after drain */
114 rc = __ecore_spq_block(p_hwfn, p_ent, p_fw_ret, true);
115 if (rc == ECORE_SUCCESS)
116 return ECORE_SUCCESS;
117
118 comp_done = (struct ecore_spq_comp_done *)p_ent->comp_cb.cookie;
119 if (comp_done->done == 1) {
120 if (p_fw_ret)
121 *p_fw_ret = comp_done->fw_return_code;
122 return ECORE_SUCCESS;
123 }
124 err:
125 DP_NOTICE(p_hwfn, true,
126 "Ramrod is stuck [CID %08x cmd %02x proto %02x echo %04x]\n",
127 OSAL_LE32_TO_CPU(p_ent->elem.hdr.cid),
128 p_ent->elem.hdr.cmd_id, p_ent->elem.hdr.protocol_id,
129 OSAL_LE16_TO_CPU(p_ent->elem.hdr.echo));
130
131 ecore_hw_err_notify(p_hwfn, ECORE_HW_ERR_RAMROD_FAIL);
132
133 return ECORE_BUSY;
134 }
135
136 /***************************************************************************
137 * SPQ entries inner API
138 ***************************************************************************/
139 static enum _ecore_status_t
140 ecore_spq_fill_entry(struct ecore_hwfn *p_hwfn, struct ecore_spq_entry *p_ent)
141 {
142 p_ent->flags = 0;
143
144 switch (p_ent->comp_mode) {
145 case ECORE_SPQ_MODE_EBLOCK:
146 case ECORE_SPQ_MODE_BLOCK:
147 p_ent->comp_cb.function = ecore_spq_blocking_cb;
148 break;
149 case ECORE_SPQ_MODE_CB:
150 break;
151 default:
152 DP_NOTICE(p_hwfn, true, "Unknown SPQE completion mode %d\n",
153 p_ent->comp_mode);
154 return ECORE_INVAL;
155 }
156
157 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
158 "Ramrod header: [CID 0x%08x CMD 0x%02x protocol 0x%02x]"
159 " Data pointer: [%08x:%08x] Completion Mode: %s\n",
160 p_ent->elem.hdr.cid, p_ent->elem.hdr.cmd_id,
161 p_ent->elem.hdr.protocol_id,
162 p_ent->elem.data_ptr.hi, p_ent->elem.data_ptr.lo,
163 D_TRINE(p_ent->comp_mode, ECORE_SPQ_MODE_EBLOCK,
164 ECORE_SPQ_MODE_BLOCK, "MODE_EBLOCK", "MODE_BLOCK",
165 "MODE_CB"));
166
167 return ECORE_SUCCESS;
168 }
169
170 /***************************************************************************
171 * HSI access
172 ***************************************************************************/
173 static void ecore_spq_hw_initialize(struct ecore_hwfn *p_hwfn,
174 struct ecore_spq *p_spq)
175 {
176 struct ecore_cxt_info cxt_info;
177 struct core_conn_context *p_cxt;
178 enum _ecore_status_t rc;
179 u16 physical_q;
180
181 cxt_info.iid = p_spq->cid;
182
183 rc = ecore_cxt_get_cid_info(p_hwfn, &cxt_info);
184
185 if (rc < 0) {
186 DP_NOTICE(p_hwfn, true, "Cannot find context info for cid=%d\n",
187 p_spq->cid);
188 return;
189 }
190
191 p_cxt = cxt_info.p_cxt;
192
193 /* @@@TBD we zero the context until we have ilt_reset implemented. */
194 OSAL_MEM_ZERO(p_cxt, sizeof(*p_cxt));
195
196 if (ECORE_IS_BB(p_hwfn->p_dev) || ECORE_IS_AH(p_hwfn->p_dev)) {
197 SET_FIELD(p_cxt->xstorm_ag_context.flags10,
198 E4_XSTORM_CORE_CONN_AG_CTX_DQ_CF_EN, 1);
199 SET_FIELD(p_cxt->xstorm_ag_context.flags1,
200 E4_XSTORM_CORE_CONN_AG_CTX_DQ_CF_ACTIVE, 1);
201 /* SET_FIELD(p_cxt->xstorm_ag_context.flags10,
202 * E4_XSTORM_CORE_CONN_AG_CTX_SLOW_PATH_EN, 1);
203 */
204 SET_FIELD(p_cxt->xstorm_ag_context.flags9,
205 E4_XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1);
206 }
207
208 /* CDU validation - FIXME currently disabled */
209
210 /* QM physical queue */
211 physical_q = ecore_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
212 p_cxt->xstorm_ag_context.physical_q0 = OSAL_CPU_TO_LE16(physical_q);
213
214 p_cxt->xstorm_st_context.spq_base_lo =
215 DMA_LO_LE(p_spq->chain.p_phys_addr);
216 p_cxt->xstorm_st_context.spq_base_hi =
217 DMA_HI_LE(p_spq->chain.p_phys_addr);
218
219 DMA_REGPAIR_LE(p_cxt->xstorm_st_context.consolid_base_addr,
220 p_hwfn->p_consq->chain.p_phys_addr);
221 }
222
223 static enum _ecore_status_t ecore_spq_hw_post(struct ecore_hwfn *p_hwfn,
224 struct ecore_spq *p_spq,
225 struct ecore_spq_entry *p_ent)
226 {
227 struct ecore_chain *p_chain = &p_hwfn->p_spq->chain;
228 u16 echo = ecore_chain_get_prod_idx(p_chain);
229 struct slow_path_element *elem;
230 struct core_db_data db;
231
232 p_ent->elem.hdr.echo = OSAL_CPU_TO_LE16(echo);
233 elem = ecore_chain_produce(p_chain);
234 if (!elem) {
235 DP_NOTICE(p_hwfn, true, "Failed to produce from SPQ chain\n");
236 return ECORE_INVAL;
237 }
238
239 *elem = p_ent->elem; /* struct assignment */
240
241 /* send a doorbell on the slow hwfn session */
242 OSAL_MEMSET(&db, 0, sizeof(db));
243 SET_FIELD(db.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
244 SET_FIELD(db.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
245 SET_FIELD(db.params, CORE_DB_DATA_AGG_VAL_SEL,
246 DQ_XCM_CORE_SPQ_PROD_CMD);
247 db.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
248 db.spq_prod = OSAL_CPU_TO_LE16(ecore_chain_get_prod_idx(p_chain));
249
250 /* make sure the SPQE is updated before the doorbell */
251 OSAL_WMB(p_hwfn->p_dev);
252
253 DOORBELL(p_hwfn, DB_ADDR(p_spq->cid, DQ_DEMS_LEGACY),
254 *(u32 *)&db);
255
256 /* make sure doorbell is rang */
257 OSAL_WMB(p_hwfn->p_dev);
258
259 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
260 "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x"
261 " agg_params: %02x, prod: %04x\n",
262 DB_ADDR(p_spq->cid, DQ_DEMS_LEGACY), p_spq->cid, db.params,
263 db.agg_flags, ecore_chain_get_prod_idx(p_chain));
264
265 return ECORE_SUCCESS;
266 }
267
268 /***************************************************************************
269 * Asynchronous events
270 ***************************************************************************/
271
272 static enum _ecore_status_t
273 ecore_async_event_completion(struct ecore_hwfn *p_hwfn,
274 struct event_ring_entry *p_eqe)
275 {
276 switch (p_eqe->protocol_id) {
277 case PROTOCOLID_COMMON:
278 return ecore_sriov_eqe_event(p_hwfn,
279 p_eqe->opcode,
280 p_eqe->echo, &p_eqe->data);
281 default:
282 DP_NOTICE(p_hwfn,
283 true, "Unknown Async completion for protocol: %d\n",
284 p_eqe->protocol_id);
285 return ECORE_INVAL;
286 }
287 }
288
289 /***************************************************************************
290 * EQ API
291 ***************************************************************************/
292 void ecore_eq_prod_update(struct ecore_hwfn *p_hwfn, u16 prod)
293 {
294 u32 addr = GTT_BAR0_MAP_REG_USDM_RAM +
295 USTORM_EQE_CONS_OFFSET(p_hwfn->rel_pf_id);
296
297 REG_WR16(p_hwfn, addr, prod);
298
299 /* keep prod updates ordered */
300 OSAL_MMIOWB(p_hwfn->p_dev);
301 }
302
303 enum _ecore_status_t ecore_eq_completion(struct ecore_hwfn *p_hwfn,
304 void *cookie)
305 {
306 struct ecore_eq *p_eq = cookie;
307 struct ecore_chain *p_chain = &p_eq->chain;
308 enum _ecore_status_t rc = 0;
309
310 /* take a snapshot of the FW consumer */
311 u16 fw_cons_idx = OSAL_LE16_TO_CPU(*p_eq->p_fw_cons);
312
313 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx);
314
315 /* Need to guarantee the fw_cons index we use points to a usuable
316 * element (to comply with our chain), so our macros would comply
317 */
318 if ((fw_cons_idx & ecore_chain_get_usable_per_page(p_chain)) ==
319 ecore_chain_get_usable_per_page(p_chain)) {
320 fw_cons_idx += ecore_chain_get_unusable_per_page(p_chain);
321 }
322
323 /* Complete current segment of eq entries */
324 while (fw_cons_idx != ecore_chain_get_cons_idx(p_chain)) {
325 struct event_ring_entry *p_eqe = ecore_chain_consume(p_chain);
326 if (!p_eqe) {
327 rc = ECORE_INVAL;
328 break;
329 }
330
331 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
332 "op %x prot %x res0 %x echo %x fwret %x flags %x\n",
333 p_eqe->opcode, /* Event Opcode */
334 p_eqe->protocol_id, /* Event Protocol ID */
335 p_eqe->reserved0, /* Reserved */
336 /* Echo value from ramrod data on the host */
337 OSAL_LE16_TO_CPU(p_eqe->echo),
338 p_eqe->fw_return_code, /* FW return code for SP
339 * ramrods
340 */
341 p_eqe->flags);
342
343 if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) {
344 if (ecore_async_event_completion(p_hwfn, p_eqe))
345 rc = ECORE_INVAL;
346 } else if (ecore_spq_completion(p_hwfn,
347 p_eqe->echo,
348 p_eqe->fw_return_code,
349 &p_eqe->data)) {
350 rc = ECORE_INVAL;
351 }
352
353 ecore_chain_recycle_consumed(p_chain);
354 }
355
356 ecore_eq_prod_update(p_hwfn, ecore_chain_get_prod_idx(p_chain));
357
358 return rc;
359 }
360
361 enum _ecore_status_t ecore_eq_alloc(struct ecore_hwfn *p_hwfn, u16 num_elem)
362 {
363 struct ecore_eq *p_eq;
364
365 /* Allocate EQ struct */
366 p_eq = OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL, sizeof(*p_eq));
367 if (!p_eq) {
368 DP_NOTICE(p_hwfn, true,
369 "Failed to allocate `struct ecore_eq'\n");
370 return ECORE_NOMEM;
371 }
372
373 /* Allocate and initialize EQ chain*/
374 if (ecore_chain_alloc(p_hwfn->p_dev,
375 ECORE_CHAIN_USE_TO_PRODUCE,
376 ECORE_CHAIN_MODE_PBL,
377 ECORE_CHAIN_CNT_TYPE_U16,
378 num_elem,
379 sizeof(union event_ring_element),
380 &p_eq->chain, OSAL_NULL) != ECORE_SUCCESS) {
381 DP_NOTICE(p_hwfn, true, "Failed to allocate eq chain\n");
382 goto eq_allocate_fail;
383 }
384
385 /* register EQ completion on the SP SB */
386 ecore_int_register_cb(p_hwfn, ecore_eq_completion,
387 p_eq, &p_eq->eq_sb_index, &p_eq->p_fw_cons);
388
389 p_hwfn->p_eq = p_eq;
390 return ECORE_SUCCESS;
391
392 eq_allocate_fail:
393 OSAL_FREE(p_hwfn->p_dev, p_eq);
394 return ECORE_NOMEM;
395 }
396
397 void ecore_eq_setup(struct ecore_hwfn *p_hwfn)
398 {
399 ecore_chain_reset(&p_hwfn->p_eq->chain);
400 }
401
402 void ecore_eq_free(struct ecore_hwfn *p_hwfn)
403 {
404 if (!p_hwfn->p_eq)
405 return;
406
407 ecore_chain_free(p_hwfn->p_dev, &p_hwfn->p_eq->chain);
408
409 OSAL_FREE(p_hwfn->p_dev, p_hwfn->p_eq);
410 p_hwfn->p_eq = OSAL_NULL;
411 }
412
413 /***************************************************************************
414 * CQE API - manipulate EQ functionality
415 ***************************************************************************/
416 static enum _ecore_status_t ecore_cqe_completion(struct ecore_hwfn *p_hwfn,
417 struct eth_slow_path_rx_cqe
418 *cqe,
419 enum protocol_type protocol)
420 {
421 if (IS_VF(p_hwfn->p_dev))
422 return OSAL_VF_CQE_COMPLETION(p_hwfn, cqe, protocol);
423
424 /* @@@tmp - it's possible we'll eventually want to handle some
425 * actual commands that can arrive here, but for now this is only
426 * used to complete the ramrod using the echo value on the cqe
427 */
428 return ecore_spq_completion(p_hwfn, cqe->echo, 0, OSAL_NULL);
429 }
430
431 enum _ecore_status_t ecore_eth_cqe_completion(struct ecore_hwfn *p_hwfn,
432 struct eth_slow_path_rx_cqe *cqe)
433 {
434 enum _ecore_status_t rc;
435
436 rc = ecore_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH);
437 if (rc) {
438 DP_NOTICE(p_hwfn, true,
439 "Failed to handle RXQ CQE [cmd 0x%02x]\n",
440 cqe->ramrod_cmd_id);
441 }
442
443 return rc;
444 }
445
446 /***************************************************************************
447 * Slow hwfn Queue (spq)
448 ***************************************************************************/
449 void ecore_spq_setup(struct ecore_hwfn *p_hwfn)
450 {
451 struct ecore_spq *p_spq = p_hwfn->p_spq;
452 struct ecore_spq_entry *p_virt = OSAL_NULL;
453 dma_addr_t p_phys = 0;
454 u32 i, capacity;
455
456 OSAL_LIST_INIT(&p_spq->pending);
457 OSAL_LIST_INIT(&p_spq->completion_pending);
458 OSAL_LIST_INIT(&p_spq->free_pool);
459 OSAL_LIST_INIT(&p_spq->unlimited_pending);
460 OSAL_SPIN_LOCK_INIT(&p_spq->lock);
461
462 /* SPQ empty pool */
463 p_phys = p_spq->p_phys + OFFSETOF(struct ecore_spq_entry, ramrod);
464 p_virt = p_spq->p_virt;
465
466 capacity = ecore_chain_get_capacity(&p_spq->chain);
467 for (i = 0; i < capacity; i++) {
468 DMA_REGPAIR_LE(p_virt->elem.data_ptr, p_phys);
469
470 OSAL_LIST_PUSH_TAIL(&p_virt->list, &p_spq->free_pool);
471
472 p_virt++;
473 p_phys += sizeof(struct ecore_spq_entry);
474 }
475
476 /* Statistics */
477 p_spq->normal_count = 0;
478 p_spq->comp_count = 0;
479 p_spq->comp_sent_count = 0;
480 p_spq->unlimited_pending_count = 0;
481
482 OSAL_MEM_ZERO(p_spq->p_comp_bitmap,
483 SPQ_COMP_BMAP_SIZE * sizeof(unsigned long));
484 p_spq->comp_bitmap_idx = 0;
485
486 /* SPQ cid, cannot fail */
487 ecore_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid);
488 ecore_spq_hw_initialize(p_hwfn, p_spq);
489
490 /* reset the chain itself */
491 ecore_chain_reset(&p_spq->chain);
492 }
493
494 enum _ecore_status_t ecore_spq_alloc(struct ecore_hwfn *p_hwfn)
495 {
496 struct ecore_spq_entry *p_virt = OSAL_NULL;
497 struct ecore_spq *p_spq = OSAL_NULL;
498 dma_addr_t p_phys = 0;
499 u32 capacity;
500
501 /* SPQ struct */
502 p_spq =
503 OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL, sizeof(struct ecore_spq));
504 if (!p_spq) {
505 DP_NOTICE(p_hwfn, true,
506 "Failed to allocate `struct ecore_spq'\n");
507 return ECORE_NOMEM;
508 }
509
510 /* SPQ ring */
511 if (ecore_chain_alloc(p_hwfn->p_dev,
512 ECORE_CHAIN_USE_TO_PRODUCE,
513 ECORE_CHAIN_MODE_SINGLE,
514 ECORE_CHAIN_CNT_TYPE_U16,
515 0, /* N/A when the mode is SINGLE */
516 sizeof(struct slow_path_element),
517 &p_spq->chain, OSAL_NULL)) {
518 DP_NOTICE(p_hwfn, true, "Failed to allocate spq chain\n");
519 goto spq_allocate_fail;
520 }
521
522 /* allocate and fill the SPQ elements (incl. ramrod data list) */
523 capacity = ecore_chain_get_capacity(&p_spq->chain);
524 p_virt = OSAL_DMA_ALLOC_COHERENT(p_hwfn->p_dev, &p_phys,
525 capacity *
526 sizeof(struct ecore_spq_entry));
527 if (!p_virt)
528 goto spq_allocate_fail;
529
530 p_spq->p_virt = p_virt;
531 p_spq->p_phys = p_phys;
532
533 OSAL_SPIN_LOCK_ALLOC(p_hwfn, &p_spq->lock);
534
535 p_hwfn->p_spq = p_spq;
536 return ECORE_SUCCESS;
537
538 spq_allocate_fail:
539 ecore_chain_free(p_hwfn->p_dev, &p_spq->chain);
540 OSAL_FREE(p_hwfn->p_dev, p_spq);
541 return ECORE_NOMEM;
542 }
543
544 void ecore_spq_free(struct ecore_hwfn *p_hwfn)
545 {
546 struct ecore_spq *p_spq = p_hwfn->p_spq;
547 u32 capacity;
548
549 if (!p_spq)
550 return;
551
552 if (p_spq->p_virt) {
553 capacity = ecore_chain_get_capacity(&p_spq->chain);
554 OSAL_DMA_FREE_COHERENT(p_hwfn->p_dev,
555 p_spq->p_virt,
556 p_spq->p_phys,
557 capacity *
558 sizeof(struct ecore_spq_entry));
559 }
560
561 ecore_chain_free(p_hwfn->p_dev, &p_spq->chain);
562 OSAL_SPIN_LOCK_DEALLOC(&p_spq->lock);
563 OSAL_FREE(p_hwfn->p_dev, p_spq);
564 }
565
566 enum _ecore_status_t
567 ecore_spq_get_entry(struct ecore_hwfn *p_hwfn, struct ecore_spq_entry **pp_ent)
568 {
569 struct ecore_spq *p_spq = p_hwfn->p_spq;
570 struct ecore_spq_entry *p_ent = OSAL_NULL;
571 enum _ecore_status_t rc = ECORE_SUCCESS;
572
573 OSAL_SPIN_LOCK(&p_spq->lock);
574
575 if (OSAL_LIST_IS_EMPTY(&p_spq->free_pool)) {
576 p_ent = OSAL_ZALLOC(p_hwfn->p_dev, GFP_ATOMIC, sizeof(*p_ent));
577 if (!p_ent) {
578 DP_NOTICE(p_hwfn, true,
579 "Failed to allocate an SPQ entry for a pending"
580 " ramrod\n");
581 rc = ECORE_NOMEM;
582 goto out_unlock;
583 }
584 p_ent->queue = &p_spq->unlimited_pending;
585 } else {
586 p_ent = OSAL_LIST_FIRST_ENTRY(&p_spq->free_pool,
587 struct ecore_spq_entry, list);
588 OSAL_LIST_REMOVE_ENTRY(&p_ent->list, &p_spq->free_pool);
589 p_ent->queue = &p_spq->pending;
590 }
591
592 *pp_ent = p_ent;
593
594 out_unlock:
595 OSAL_SPIN_UNLOCK(&p_spq->lock);
596 return rc;
597 }
598
599 /* Locked variant; Should be called while the SPQ lock is taken */
600 static void __ecore_spq_return_entry(struct ecore_hwfn *p_hwfn,
601 struct ecore_spq_entry *p_ent)
602 {
603 OSAL_LIST_PUSH_TAIL(&p_ent->list, &p_hwfn->p_spq->free_pool);
604 }
605
606 void ecore_spq_return_entry(struct ecore_hwfn *p_hwfn,
607 struct ecore_spq_entry *p_ent)
608 {
609 OSAL_SPIN_LOCK(&p_hwfn->p_spq->lock);
610 __ecore_spq_return_entry(p_hwfn, p_ent);
611 OSAL_SPIN_UNLOCK(&p_hwfn->p_spq->lock);
612 }
613
614 /**
615 * @brief ecore_spq_add_entry - adds a new entry to the pending
616 * list. Should be used while lock is being held.
617 *
618 * Addes an entry to the pending list is there is room (en empty
619 * element is available in the free_pool), or else places the
620 * entry in the unlimited_pending pool.
621 *
622 * @param p_hwfn
623 * @param p_ent
624 * @param priority
625 *
626 * @return enum _ecore_status_t
627 */
628 static enum _ecore_status_t
629 ecore_spq_add_entry(struct ecore_hwfn *p_hwfn,
630 struct ecore_spq_entry *p_ent, enum spq_priority priority)
631 {
632 struct ecore_spq *p_spq = p_hwfn->p_spq;
633
634 if (p_ent->queue == &p_spq->unlimited_pending) {
635 if (OSAL_LIST_IS_EMPTY(&p_spq->free_pool)) {
636 OSAL_LIST_PUSH_TAIL(&p_ent->list,
637 &p_spq->unlimited_pending);
638 p_spq->unlimited_pending_count++;
639
640 return ECORE_SUCCESS;
641
642 } else {
643 struct ecore_spq_entry *p_en2;
644
645 p_en2 = OSAL_LIST_FIRST_ENTRY(&p_spq->free_pool,
646 struct ecore_spq_entry,
647 list);
648 OSAL_LIST_REMOVE_ENTRY(&p_en2->list, &p_spq->free_pool);
649
650 /* Copy the ring element physical pointer to the new
651 * entry, since we are about to override the entire ring
652 * entry and don't want to lose the pointer.
653 */
654 p_ent->elem.data_ptr = p_en2->elem.data_ptr;
655
656 *p_en2 = *p_ent;
657
658 /* EBLOCK responsible to free the allocated p_ent */
659 if (p_ent->comp_mode != ECORE_SPQ_MODE_EBLOCK)
660 OSAL_FREE(p_hwfn->p_dev, p_ent);
661
662 p_ent = p_en2;
663 }
664 }
665
666 /* entry is to be placed in 'pending' queue */
667 switch (priority) {
668 case ECORE_SPQ_PRIORITY_NORMAL:
669 OSAL_LIST_PUSH_TAIL(&p_ent->list, &p_spq->pending);
670 p_spq->normal_count++;
671 break;
672 case ECORE_SPQ_PRIORITY_HIGH:
673 OSAL_LIST_PUSH_HEAD(&p_ent->list, &p_spq->pending);
674 p_spq->high_count++;
675 break;
676 default:
677 return ECORE_INVAL;
678 }
679
680 return ECORE_SUCCESS;
681 }
682
683 /***************************************************************************
684 * Accessor
685 ***************************************************************************/
686
687 u32 ecore_spq_get_cid(struct ecore_hwfn *p_hwfn)
688 {
689 if (!p_hwfn->p_spq)
690 return 0xffffffff; /* illegal */
691 return p_hwfn->p_spq->cid;
692 }
693
694 /***************************************************************************
695 * Posting new Ramrods
696 ***************************************************************************/
697
698 static enum _ecore_status_t ecore_spq_post_list(struct ecore_hwfn *p_hwfn,
699 osal_list_t *head,
700 u32 keep_reserve)
701 {
702 struct ecore_spq *p_spq = p_hwfn->p_spq;
703 enum _ecore_status_t rc;
704
705 /* TODO - implementation might be wasteful; will always keep room
706 * for an additional high priority ramrod (even if one is already
707 * pending FW)
708 */
709 while (ecore_chain_get_elem_left(&p_spq->chain) > keep_reserve &&
710 !OSAL_LIST_IS_EMPTY(head)) {
711 struct ecore_spq_entry *p_ent =
712 OSAL_LIST_FIRST_ENTRY(head, struct ecore_spq_entry, list);
713 if (p_ent != OSAL_NULL) {
714 #if defined(_NTDDK_)
715 #pragma warning(suppress : 6011 28182)
716 #endif
717 OSAL_LIST_REMOVE_ENTRY(&p_ent->list, head);
718 OSAL_LIST_PUSH_TAIL(&p_ent->list,
719 &p_spq->completion_pending);
720 p_spq->comp_sent_count++;
721
722 rc = ecore_spq_hw_post(p_hwfn, p_spq, p_ent);
723 if (rc) {
724 OSAL_LIST_REMOVE_ENTRY(&p_ent->list,
725 &p_spq->completion_pending);
726 __ecore_spq_return_entry(p_hwfn, p_ent);
727 return rc;
728 }
729 }
730 }
731
732 return ECORE_SUCCESS;
733 }
734
735 static enum _ecore_status_t ecore_spq_pend_post(struct ecore_hwfn *p_hwfn)
736 {
737 struct ecore_spq *p_spq = p_hwfn->p_spq;
738 struct ecore_spq_entry *p_ent = OSAL_NULL;
739
740 while (!OSAL_LIST_IS_EMPTY(&p_spq->free_pool)) {
741 if (OSAL_LIST_IS_EMPTY(&p_spq->unlimited_pending))
742 break;
743
744 p_ent = OSAL_LIST_FIRST_ENTRY(&p_spq->unlimited_pending,
745 struct ecore_spq_entry, list);
746 if (!p_ent)
747 return ECORE_INVAL;
748
749 #if defined(_NTDDK_)
750 #pragma warning(suppress : 6011)
751 #endif
752 OSAL_LIST_REMOVE_ENTRY(&p_ent->list, &p_spq->unlimited_pending);
753
754 ecore_spq_add_entry(p_hwfn, p_ent, p_ent->priority);
755 }
756
757 return ecore_spq_post_list(p_hwfn,
758 &p_spq->pending, SPQ_HIGH_PRI_RESERVE_DEFAULT);
759 }
760
761 enum _ecore_status_t ecore_spq_post(struct ecore_hwfn *p_hwfn,
762 struct ecore_spq_entry *p_ent,
763 u8 *fw_return_code)
764 {
765 enum _ecore_status_t rc = ECORE_SUCCESS;
766 struct ecore_spq *p_spq = p_hwfn ? p_hwfn->p_spq : OSAL_NULL;
767 bool b_ret_ent = true;
768
769 if (!p_hwfn)
770 return ECORE_INVAL;
771
772 if (!p_ent) {
773 DP_NOTICE(p_hwfn, true, "Got a NULL pointer\n");
774 return ECORE_INVAL;
775 }
776
777 if (p_hwfn->p_dev->recov_in_prog) {
778 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
779 "Recovery is in progress -> skip spq post"
780 " [cmd %02x protocol %02x]\n",
781 p_ent->elem.hdr.cmd_id, p_ent->elem.hdr.protocol_id);
782 /* Return success to let the flows to be completed successfully
783 * w/o any error handling.
784 */
785 return ECORE_SUCCESS;
786 }
787
788 OSAL_SPIN_LOCK(&p_spq->lock);
789
790 /* Complete the entry */
791 rc = ecore_spq_fill_entry(p_hwfn, p_ent);
792
793 /* Check return value after LOCK is taken for cleaner error flow */
794 if (rc)
795 goto spq_post_fail;
796
797 /* Add the request to the pending queue */
798 rc = ecore_spq_add_entry(p_hwfn, p_ent, p_ent->priority);
799 if (rc)
800 goto spq_post_fail;
801
802 rc = ecore_spq_pend_post(p_hwfn);
803 if (rc) {
804 /* Since it's possible that pending failed for a different
805 * entry [although unlikely], the failed entry was already
806 * dealt with; No need to return it here.
807 */
808 b_ret_ent = false;
809 goto spq_post_fail;
810 }
811
812 OSAL_SPIN_UNLOCK(&p_spq->lock);
813
814 if (p_ent->comp_mode == ECORE_SPQ_MODE_EBLOCK) {
815 /* For entries in ECORE BLOCK mode, the completion code cannot
816 * perform the necessary cleanup - if it did, we couldn't
817 * access p_ent here to see whether it's successful or not.
818 * Thus, after gaining the answer perform the cleanup here.
819 */
820 rc = ecore_spq_block(p_hwfn, p_ent, fw_return_code,
821 p_ent->queue == &p_spq->unlimited_pending);
822
823 if (p_ent->queue == &p_spq->unlimited_pending) {
824 /* This is an allocated p_ent which does not need to
825 * return to pool.
826 */
827 OSAL_FREE(p_hwfn->p_dev, p_ent);
828
829 /* TBD: handle error flow and remove p_ent from
830 * completion pending
831 */
832 return rc;
833 }
834
835 if (rc)
836 goto spq_post_fail2;
837
838 /* return to pool */
839 ecore_spq_return_entry(p_hwfn, p_ent);
840 }
841 return rc;
842
843 spq_post_fail2:
844 OSAL_SPIN_LOCK(&p_spq->lock);
845 OSAL_LIST_REMOVE_ENTRY(&p_ent->list, &p_spq->completion_pending);
846 ecore_chain_return_produced(&p_spq->chain);
847
848 spq_post_fail:
849 /* return to the free pool */
850 if (b_ret_ent)
851 __ecore_spq_return_entry(p_hwfn, p_ent);
852 OSAL_SPIN_UNLOCK(&p_spq->lock);
853
854 return rc;
855 }
856
857 enum _ecore_status_t ecore_spq_completion(struct ecore_hwfn *p_hwfn,
858 __le16 echo,
859 u8 fw_return_code,
860 union event_ring_data *p_data)
861 {
862 struct ecore_spq *p_spq;
863 struct ecore_spq_entry *p_ent = OSAL_NULL;
864 struct ecore_spq_entry *tmp;
865 struct ecore_spq_entry *found = OSAL_NULL;
866 enum _ecore_status_t rc;
867
868 if (!p_hwfn)
869 return ECORE_INVAL;
870
871 p_spq = p_hwfn->p_spq;
872 if (!p_spq)
873 return ECORE_INVAL;
874
875 OSAL_SPIN_LOCK(&p_spq->lock);
876 OSAL_LIST_FOR_EACH_ENTRY_SAFE(p_ent,
877 tmp,
878 &p_spq->completion_pending,
879 list, struct ecore_spq_entry) {
880 if (p_ent->elem.hdr.echo == echo) {
881 OSAL_LIST_REMOVE_ENTRY(&p_ent->list,
882 &p_spq->completion_pending);
883
884 /* Avoid overriding of SPQ entries when getting
885 * out-of-order completions, by marking the completions
886 * in a bitmap and increasing the chain consumer only
887 * for the first successive completed entries.
888 */
889 SPQ_COMP_BMAP_SET_BIT(p_spq, echo);
890 while (SPQ_COMP_BMAP_TEST_BIT(p_spq,
891 p_spq->comp_bitmap_idx)) {
892 SPQ_COMP_BMAP_CLEAR_BIT(p_spq,
893 p_spq->comp_bitmap_idx);
894 p_spq->comp_bitmap_idx++;
895 ecore_chain_return_produced(&p_spq->chain);
896 }
897
898 p_spq->comp_count++;
899 found = p_ent;
900 break;
901 }
902
903 /* This is debug and should be relatively uncommon - depends
904 * on scenarios which have mutliple per-PF sent ramrods.
905 */
906 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
907 "Got completion for echo %04x - doesn't match"
908 " echo %04x in completion pending list\n",
909 OSAL_LE16_TO_CPU(echo),
910 OSAL_LE16_TO_CPU(p_ent->elem.hdr.echo));
911 }
912
913 /* Release lock before callback, as callback may post
914 * an additional ramrod.
915 */
916 OSAL_SPIN_UNLOCK(&p_spq->lock);
917
918 if (!found) {
919 DP_NOTICE(p_hwfn, true,
920 "Failed to find an entry this"
921 " EQE [echo %04x] completes\n",
922 OSAL_LE16_TO_CPU(echo));
923 return ECORE_EXISTS;
924 }
925
926 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
927 "Complete EQE [echo %04x]: func %p cookie %p)\n",
928 OSAL_LE16_TO_CPU(echo),
929 p_ent->comp_cb.function, p_ent->comp_cb.cookie);
930 if (found->comp_cb.function)
931 found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data,
932 fw_return_code);
933 else
934 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
935 "Got a completion without a callback function\n");
936
937 if ((found->comp_mode != ECORE_SPQ_MODE_EBLOCK) ||
938 (found->queue == &p_spq->unlimited_pending))
939 /* EBLOCK is responsible for returning its own entry into the
940 * free list, unless it originally added the entry into the
941 * unlimited pending list.
942 */
943 ecore_spq_return_entry(p_hwfn, found);
944
945 /* Attempt to post pending requests */
946 OSAL_SPIN_LOCK(&p_spq->lock);
947 rc = ecore_spq_pend_post(p_hwfn);
948 OSAL_SPIN_UNLOCK(&p_spq->lock);
949
950 return rc;
951 }
952
953 enum _ecore_status_t ecore_consq_alloc(struct ecore_hwfn *p_hwfn)
954 {
955 struct ecore_consq *p_consq;
956
957 /* Allocate ConsQ struct */
958 p_consq =
959 OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL, sizeof(*p_consq));
960 if (!p_consq) {
961 DP_NOTICE(p_hwfn, true,
962 "Failed to allocate `struct ecore_consq'\n");
963 return ECORE_NOMEM;
964 }
965
966 /* Allocate and initialize EQ chain */
967 if (ecore_chain_alloc(p_hwfn->p_dev,
968 ECORE_CHAIN_USE_TO_PRODUCE,
969 ECORE_CHAIN_MODE_PBL,
970 ECORE_CHAIN_CNT_TYPE_U16,
971 ECORE_CHAIN_PAGE_SIZE / 0x80,
972 0x80,
973 &p_consq->chain, OSAL_NULL) != ECORE_SUCCESS) {
974 DP_NOTICE(p_hwfn, true, "Failed to allocate consq chain");
975 goto consq_allocate_fail;
976 }
977
978 p_hwfn->p_consq = p_consq;
979 return ECORE_SUCCESS;
980
981 consq_allocate_fail:
982 OSAL_FREE(p_hwfn->p_dev, p_consq);
983 return ECORE_NOMEM;
984 }
985
986 void ecore_consq_setup(struct ecore_hwfn *p_hwfn)
987 {
988 ecore_chain_reset(&p_hwfn->p_consq->chain);
989 }
990
991 void ecore_consq_free(struct ecore_hwfn *p_hwfn)
992 {
993 if (!p_hwfn->p_consq)
994 return;
995
996 ecore_chain_free(p_hwfn->p_dev, &p_hwfn->p_consq->chain);
997 OSAL_FREE(p_hwfn->p_dev, p_hwfn->p_consq);
998 }
Ceph