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drm/rockchip: Don't change hdmi reference clock rate
[drm/drm-misc.git] / drivers / net / ethernet / qlogic / qed / qed_spq.c
blobd01b9245f811cbf1d4c85d5252374efdeeb4525a
1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
2 /* QLogic qed NIC Driver
3 * Copyright (c) 2015-2017 QLogic Corporation
4 * Copyright (c) 2019-2020 Marvell International Ltd.
5 */
6
7 #include <linux/types.h>
8 #include <asm/byteorder.h>
9 #include <linux/io.h>
10 #include <linux/delay.h>
11 #include <linux/dma-mapping.h>
12 #include <linux/errno.h>
13 #include <linux/kernel.h>
14 #include <linux/list.h>
15 #include <linux/pci.h>
16 #include <linux/slab.h>
17 #include <linux/spinlock.h>
18 #include <linux/string.h>
19 #include "qed.h"
20 #include "qed_cxt.h"
21 #include "qed_dev_api.h"
22 #include "qed_hsi.h"
23 #include "qed_iro_hsi.h"
24 #include "qed_hw.h"
25 #include "qed_int.h"
26 #include "qed_iscsi.h"
27 #include "qed_mcp.h"
28 #include "qed_ooo.h"
29 #include "qed_reg_addr.h"
30 #include "qed_sp.h"
31 #include "qed_sriov.h"
32 #include "qed_rdma.h"
33
34 /***************************************************************************
35 * Structures & Definitions
36 ***************************************************************************/
37
38 #define SPQ_HIGH_PRI_RESERVE_DEFAULT (1)
39
40 #define SPQ_BLOCK_DELAY_MAX_ITER (10)
41 #define SPQ_BLOCK_DELAY_US (10)
42 #define SPQ_BLOCK_SLEEP_MAX_ITER (1000)
43 #define SPQ_BLOCK_SLEEP_MS (5)
44
45 /***************************************************************************
46 * Blocking Imp. (BLOCK/EBLOCK mode)
47 ***************************************************************************/
48 static void qed_spq_blocking_cb(struct qed_hwfn *p_hwfn,
49 void *cookie,
50 union event_ring_data *data, u8 fw_return_code)
51 {
52 struct qed_spq_comp_done *comp_done;
53
54 comp_done = (struct qed_spq_comp_done *)cookie;
55
56 comp_done->fw_return_code = fw_return_code;
57
58 /* Make sure completion done is visible on waiting thread */
59 smp_store_release(&comp_done->done, 0x1);
60 }
61
62 static int __qed_spq_block(struct qed_hwfn *p_hwfn,
63 struct qed_spq_entry *p_ent,
64 u8 *p_fw_ret, bool sleep_between_iter)
65 {
66 struct qed_spq_comp_done *comp_done;
67 u32 iter_cnt;
68
69 comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie;
70 iter_cnt = sleep_between_iter ? SPQ_BLOCK_SLEEP_MAX_ITER
71 : SPQ_BLOCK_DELAY_MAX_ITER;
72
73 while (iter_cnt--) {
74 /* Validate we receive completion update */
75 if (smp_load_acquire(&comp_done->done) == 1) { /* ^^^ */
76 if (p_fw_ret)
77 *p_fw_ret = comp_done->fw_return_code;
78 return 0;
79 }
80
81 if (sleep_between_iter)
82 msleep(SPQ_BLOCK_SLEEP_MS);
83 else
84 udelay(SPQ_BLOCK_DELAY_US);
85 }
86
87 return -EBUSY;
88 }
89
90 static int qed_spq_block(struct qed_hwfn *p_hwfn,
91 struct qed_spq_entry *p_ent,
92 u8 *p_fw_ret, bool skip_quick_poll)
93 {
94 struct qed_spq_comp_done *comp_done;
95 struct qed_ptt *p_ptt;
96 int rc;
97
98 /* A relatively short polling period w/o sleeping, to allow the FW to
99 * complete the ramrod and thus possibly to avoid the following sleeps.
100 */
101 if (!skip_quick_poll) {
102 rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, false);
103 if (!rc)
104 return 0;
105 }
106
107 /* Move to polling with a sleeping period between iterations */
108 rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, true);
109 if (!rc)
110 return 0;
111
112 p_ptt = qed_ptt_acquire(p_hwfn);
113 if (!p_ptt) {
114 DP_NOTICE(p_hwfn, "ptt, failed to acquire\n");
115 return -EAGAIN;
116 }
117
118 DP_INFO(p_hwfn, "Ramrod is stuck, requesting MCP drain\n");
119 rc = qed_mcp_drain(p_hwfn, p_ptt);
120 qed_ptt_release(p_hwfn, p_ptt);
121 if (rc) {
122 DP_NOTICE(p_hwfn, "MCP drain failed\n");
123 goto err;
124 }
125
126 /* Retry after drain */
127 rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, true);
128 if (!rc)
129 return 0;
130
131 comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie;
132 if (comp_done->done == 1) {
133 if (p_fw_ret)
134 *p_fw_ret = comp_done->fw_return_code;
135 return 0;
136 }
137 err:
138 p_ptt = qed_ptt_acquire(p_hwfn);
139 if (!p_ptt)
140 return -EBUSY;
141 qed_hw_err_notify(p_hwfn, p_ptt, QED_HW_ERR_RAMROD_FAIL,
142 "Ramrod is stuck [CID %08x %s:%02x %s:%02x echo %04x]\n",
143 le32_to_cpu(p_ent->elem.hdr.cid),
144 qed_get_ramrod_cmd_id_str(p_ent->elem.hdr.protocol_id,
145 p_ent->elem.hdr.cmd_id),
146 p_ent->elem.hdr.cmd_id,
147 qed_get_protocol_type_str(p_ent->elem.hdr.protocol_id),
148 p_ent->elem.hdr.protocol_id,
149 le16_to_cpu(p_ent->elem.hdr.echo));
150 qed_ptt_release(p_hwfn, p_ptt);
151
152 return -EBUSY;
153 }
154
155 /***************************************************************************
156 * SPQ entries inner API
157 ***************************************************************************/
158 static int qed_spq_fill_entry(struct qed_hwfn *p_hwfn,
159 struct qed_spq_entry *p_ent)
160 {
161 p_ent->flags = 0;
162
163 switch (p_ent->comp_mode) {
164 case QED_SPQ_MODE_EBLOCK:
165 case QED_SPQ_MODE_BLOCK:
166 p_ent->comp_cb.function = qed_spq_blocking_cb;
167 break;
168 case QED_SPQ_MODE_CB:
169 break;
170 default:
171 DP_NOTICE(p_hwfn, "Unknown SPQE completion mode %d\n",
172 p_ent->comp_mode);
173 return -EINVAL;
174 }
175
176 DP_VERBOSE(p_hwfn,
177 QED_MSG_SPQ,
178 "Ramrod hdr: [CID 0x%08x %s:0x%02x %s:0x%02x] Data ptr: [%08x:%08x] Cmpltion Mode: %s\n",
179 p_ent->elem.hdr.cid,
180 qed_get_ramrod_cmd_id_str(p_ent->elem.hdr.protocol_id,
181 p_ent->elem.hdr.cmd_id),
182 p_ent->elem.hdr.cmd_id,
183 qed_get_protocol_type_str(p_ent->elem.hdr.protocol_id),
184 p_ent->elem.hdr.protocol_id,
185 p_ent->elem.data_ptr.hi, p_ent->elem.data_ptr.lo,
186 D_TRINE(p_ent->comp_mode, QED_SPQ_MODE_EBLOCK,
187 QED_SPQ_MODE_BLOCK, "MODE_EBLOCK", "MODE_BLOCK",
188 "MODE_CB"));
189
190 return 0;
191 }
192
193 /***************************************************************************
194 * HSI access
195 ***************************************************************************/
196 static void qed_spq_hw_initialize(struct qed_hwfn *p_hwfn,
197 struct qed_spq *p_spq)
198 {
199 struct core_conn_context *p_cxt;
200 struct qed_cxt_info cxt_info;
201 u16 physical_q;
202 int rc;
203
204 cxt_info.iid = p_spq->cid;
205
206 rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info);
207
208 if (rc < 0) {
209 DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n",
210 p_spq->cid);
211 return;
212 }
213
214 p_cxt = cxt_info.p_cxt;
215
216 SET_FIELD(p_cxt->xstorm_ag_context.flags10,
217 XSTORM_CORE_CONN_AG_CTX_DQ_CF_EN, 1);
218 SET_FIELD(p_cxt->xstorm_ag_context.flags1,
219 XSTORM_CORE_CONN_AG_CTX_DQ_CF_ACTIVE, 1);
220 SET_FIELD(p_cxt->xstorm_ag_context.flags9,
221 XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1);
222
223 /* QM physical queue */
224 physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
225 p_cxt->xstorm_ag_context.physical_q0 = cpu_to_le16(physical_q);
226
227 p_cxt->xstorm_st_context.spq_base_addr.lo =
228 DMA_LO_LE(p_spq->chain.p_phys_addr);
229 p_cxt->xstorm_st_context.spq_base_addr.hi =
230 DMA_HI_LE(p_spq->chain.p_phys_addr);
231 }
232
233 static int qed_spq_hw_post(struct qed_hwfn *p_hwfn,
234 struct qed_spq *p_spq, struct qed_spq_entry *p_ent)
235 {
236 struct qed_chain *p_chain = &p_hwfn->p_spq->chain;
237 struct core_db_data *p_db_data = &p_spq->db_data;
238 u16 echo = qed_chain_get_prod_idx(p_chain);
239 struct slow_path_element *elem;
240
241 p_ent->elem.hdr.echo = cpu_to_le16(echo);
242 elem = qed_chain_produce(p_chain);
243 if (!elem) {
244 DP_NOTICE(p_hwfn, "Failed to produce from SPQ chain\n");
245 return -EINVAL;
246 }
247
248 *elem = p_ent->elem; /* struct assignment */
249
250 /* send a doorbell on the slow hwfn session */
251 p_db_data->spq_prod = cpu_to_le16(qed_chain_get_prod_idx(p_chain));
252
253 /* make sure the SPQE is updated before the doorbell */
254 wmb();
255
256 DOORBELL(p_hwfn, p_spq->db_addr_offset, *(u32 *)p_db_data);
257
258 /* make sure doorbell is rang */
259 wmb();
260
261 DP_VERBOSE(p_hwfn, QED_MSG_SPQ,
262 "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x agg_params: %02x, prod: %04x\n",
263 p_spq->db_addr_offset,
264 p_spq->cid,
265 p_db_data->params,
266 p_db_data->agg_flags, qed_chain_get_prod_idx(p_chain));
267
268 return 0;
269 }
270
271 /***************************************************************************
272 * Asynchronous events
273 ***************************************************************************/
274 static int
275 qed_async_event_completion(struct qed_hwfn *p_hwfn,
276 struct event_ring_entry *p_eqe)
277 {
278 qed_spq_async_comp_cb cb;
279
280 if (!p_hwfn->p_spq)
281 return -EINVAL;
282
283 if (p_eqe->protocol_id >= MAX_PROTOCOL_TYPE) {
284 DP_ERR(p_hwfn, "Wrong protocol: %s:%d\n",
285 qed_get_protocol_type_str(p_eqe->protocol_id),
286 p_eqe->protocol_id);
287
288 return -EINVAL;
289 }
290
291 cb = p_hwfn->p_spq->async_comp_cb[p_eqe->protocol_id];
292 if (cb) {
293 return cb(p_hwfn, p_eqe->opcode, p_eqe->echo,
294 &p_eqe->data, p_eqe->fw_return_code);
295 } else {
296 DP_NOTICE(p_hwfn,
297 "Unknown Async completion for %s:%d\n",
298 qed_get_protocol_type_str(p_eqe->protocol_id),
299 p_eqe->protocol_id);
300
301 return -EINVAL;
302 }
303 }
304
305 int
306 qed_spq_register_async_cb(struct qed_hwfn *p_hwfn,
307 enum protocol_type protocol_id,
308 qed_spq_async_comp_cb cb)
309 {
310 if (!p_hwfn->p_spq || (protocol_id >= MAX_PROTOCOL_TYPE))
311 return -EINVAL;
312
313 p_hwfn->p_spq->async_comp_cb[protocol_id] = cb;
314 return 0;
315 }
316
317 void
318 qed_spq_unregister_async_cb(struct qed_hwfn *p_hwfn,
319 enum protocol_type protocol_id)
320 {
321 if (!p_hwfn->p_spq || (protocol_id >= MAX_PROTOCOL_TYPE))
322 return;
323
324 p_hwfn->p_spq->async_comp_cb[protocol_id] = NULL;
325 }
326
327 /***************************************************************************
328 * EQ API
329 ***************************************************************************/
330 void qed_eq_prod_update(struct qed_hwfn *p_hwfn, u16 prod)
331 {
332 u32 addr = GET_GTT_REG_ADDR(GTT_BAR0_MAP_REG_USDM_RAM,
333 USTORM_EQE_CONS, p_hwfn->rel_pf_id);
334
335 REG_WR16(p_hwfn, addr, prod);
336 }
337
338 int qed_eq_completion(struct qed_hwfn *p_hwfn, void *cookie)
339 {
340 struct qed_eq *p_eq = cookie;
341 struct qed_chain *p_chain = &p_eq->chain;
342 int rc = 0;
343
344 /* take a snapshot of the FW consumer */
345 u16 fw_cons_idx = le16_to_cpu(*p_eq->p_fw_cons);
346
347 DP_VERBOSE(p_hwfn, QED_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx);
348
349 /* Need to guarantee the fw_cons index we use points to a usuable
350 * element (to comply with our chain), so our macros would comply
351 */
352 if ((fw_cons_idx & qed_chain_get_usable_per_page(p_chain)) ==
353 qed_chain_get_usable_per_page(p_chain))
354 fw_cons_idx += qed_chain_get_unusable_per_page(p_chain);
355
356 /* Complete current segment of eq entries */
357 while (fw_cons_idx != qed_chain_get_cons_idx(p_chain)) {
358 struct event_ring_entry *p_eqe = qed_chain_consume(p_chain);
359
360 if (!p_eqe) {
361 rc = -EINVAL;
362 break;
363 }
364
365 DP_VERBOSE(p_hwfn, QED_MSG_SPQ,
366 "op %x prot %x res0 %x echo %x fwret %x flags %x\n",
367 p_eqe->opcode,
368 p_eqe->protocol_id,
369 p_eqe->reserved0,
370 le16_to_cpu(p_eqe->echo),
371 p_eqe->fw_return_code,
372 p_eqe->flags);
373
374 if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) {
375 if (qed_async_event_completion(p_hwfn, p_eqe))
376 rc = -EINVAL;
377 } else if (qed_spq_completion(p_hwfn,
378 p_eqe->echo,
379 p_eqe->fw_return_code,
380 &p_eqe->data)) {
381 rc = -EINVAL;
382 }
383
384 qed_chain_recycle_consumed(p_chain);
385 }
386
387 qed_eq_prod_update(p_hwfn, qed_chain_get_prod_idx(p_chain));
388
389 /* Attempt to post pending requests */
390 spin_lock_bh(&p_hwfn->p_spq->lock);
391 rc = qed_spq_pend_post(p_hwfn);
392 spin_unlock_bh(&p_hwfn->p_spq->lock);
393
394 return rc;
395 }
396
397 int qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem)
398 {
399 struct qed_chain_init_params params = {
400 .mode = QED_CHAIN_MODE_PBL,
401 .intended_use = QED_CHAIN_USE_TO_PRODUCE,
402 .cnt_type = QED_CHAIN_CNT_TYPE_U16,
403 .num_elems = num_elem,
404 .elem_size = sizeof(union event_ring_element),
405 };
406 struct qed_eq *p_eq;
407 int ret;
408
409 /* Allocate EQ struct */
410 p_eq = kzalloc(sizeof(*p_eq), GFP_KERNEL);
411 if (!p_eq)
412 return -ENOMEM;
413
414 ret = qed_chain_alloc(p_hwfn->cdev, &p_eq->chain, &params);
415 if (ret) {
416 DP_NOTICE(p_hwfn, "Failed to allocate EQ chain\n");
417 goto eq_allocate_fail;
418 }
419
420 /* register EQ completion on the SP SB */
421 qed_int_register_cb(p_hwfn, qed_eq_completion,
422 p_eq, &p_eq->eq_sb_index, &p_eq->p_fw_cons);
423
424 p_hwfn->p_eq = p_eq;
425 return 0;
426
427 eq_allocate_fail:
428 kfree(p_eq);
429
430 return ret;
431 }
432
433 void qed_eq_setup(struct qed_hwfn *p_hwfn)
434 {
435 qed_chain_reset(&p_hwfn->p_eq->chain);
436 }
437
438 void qed_eq_free(struct qed_hwfn *p_hwfn)
439 {
440 if (!p_hwfn->p_eq)
441 return;
442
443 qed_chain_free(p_hwfn->cdev, &p_hwfn->p_eq->chain);
444
445 kfree(p_hwfn->p_eq);
446 p_hwfn->p_eq = NULL;
447 }
448
449 /***************************************************************************
450 * CQE API - manipulate EQ functionality
451 ***************************************************************************/
452 static int qed_cqe_completion(struct qed_hwfn *p_hwfn,
453 struct eth_slow_path_rx_cqe *cqe,
454 enum protocol_type protocol)
455 {
456 if (IS_VF(p_hwfn->cdev))
457 return 0;
458
459 /* @@@tmp - it's possible we'll eventually want to handle some
460 * actual commands that can arrive here, but for now this is only
461 * used to complete the ramrod using the echo value on the cqe
462 */
463 return qed_spq_completion(p_hwfn, cqe->echo, 0, NULL);
464 }
465
466 int qed_eth_cqe_completion(struct qed_hwfn *p_hwfn,
467 struct eth_slow_path_rx_cqe *cqe)
468 {
469 int rc;
470
471 rc = qed_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH);
472 if (rc)
473 DP_NOTICE(p_hwfn,
474 "Failed to handle RXQ CQE [cmd 0x%02x]\n",
475 cqe->ramrod_cmd_id);
476
477 return rc;
478 }
479
480 /***************************************************************************
481 * Slow hwfn Queue (spq)
482 ***************************************************************************/
483 void qed_spq_setup(struct qed_hwfn *p_hwfn)
484 {
485 struct qed_spq *p_spq = p_hwfn->p_spq;
486 struct qed_spq_entry *p_virt = NULL;
487 struct core_db_data *p_db_data;
488 void __iomem *db_addr;
489 dma_addr_t p_phys = 0;
490 u32 i, capacity;
491 int rc;
492
493 INIT_LIST_HEAD(&p_spq->pending);
494 INIT_LIST_HEAD(&p_spq->completion_pending);
495 INIT_LIST_HEAD(&p_spq->free_pool);
496 INIT_LIST_HEAD(&p_spq->unlimited_pending);
497 spin_lock_init(&p_spq->lock);
498
499 /* SPQ empty pool */
500 p_phys = p_spq->p_phys + offsetof(struct qed_spq_entry, ramrod);
501 p_virt = p_spq->p_virt;
502
503 capacity = qed_chain_get_capacity(&p_spq->chain);
504 for (i = 0; i < capacity; i++) {
505 DMA_REGPAIR_LE(p_virt->elem.data_ptr, p_phys);
506
507 list_add_tail(&p_virt->list, &p_spq->free_pool);
508
509 p_virt++;
510 p_phys += sizeof(struct qed_spq_entry);
511 }
512
513 /* Statistics */
514 p_spq->normal_count = 0;
515 p_spq->comp_count = 0;
516 p_spq->comp_sent_count = 0;
517 p_spq->unlimited_pending_count = 0;
518
519 bitmap_zero(p_spq->p_comp_bitmap, SPQ_RING_SIZE);
520 p_spq->comp_bitmap_idx = 0;
521
522 /* SPQ cid, cannot fail */
523 qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid);
524 qed_spq_hw_initialize(p_hwfn, p_spq);
525
526 /* reset the chain itself */
527 qed_chain_reset(&p_spq->chain);
528
529 /* Initialize the address/data of the SPQ doorbell */
530 p_spq->db_addr_offset = qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY);
531 p_db_data = &p_spq->db_data;
532 memset(p_db_data, 0, sizeof(*p_db_data));
533 SET_FIELD(p_db_data->params, CORE_DB_DATA_DEST, DB_DEST_XCM);
534 SET_FIELD(p_db_data->params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_MAX);
535 SET_FIELD(p_db_data->params, CORE_DB_DATA_AGG_VAL_SEL,
536 DQ_XCM_CORE_SPQ_PROD_CMD);
537 p_db_data->agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
538
539 /* Register the SPQ doorbell with the doorbell recovery mechanism */
540 db_addr = (void __iomem *)((u8 __iomem *)p_hwfn->doorbells +
541 p_spq->db_addr_offset);
542 rc = qed_db_recovery_add(p_hwfn->cdev, db_addr, &p_spq->db_data,
543 DB_REC_WIDTH_32B, DB_REC_KERNEL);
544 if (rc)
545 DP_INFO(p_hwfn,
546 "Failed to register the SPQ doorbell with the doorbell recovery mechanism\n");
547 }
548
549 int qed_spq_alloc(struct qed_hwfn *p_hwfn)
550 {
551 struct qed_chain_init_params params = {
552 .mode = QED_CHAIN_MODE_SINGLE,
553 .intended_use = QED_CHAIN_USE_TO_PRODUCE,
554 .cnt_type = QED_CHAIN_CNT_TYPE_U16,
555 .elem_size = sizeof(struct slow_path_element),
556 };
557 struct qed_dev *cdev = p_hwfn->cdev;
558 struct qed_spq_entry *p_virt = NULL;
559 struct qed_spq *p_spq = NULL;
560 dma_addr_t p_phys = 0;
561 u32 capacity;
562 int ret;
563
564 /* SPQ struct */
565 p_spq = kzalloc(sizeof(*p_spq), GFP_KERNEL);
566 if (!p_spq)
567 return -ENOMEM;
568
569 /* SPQ ring */
570 ret = qed_chain_alloc(cdev, &p_spq->chain, &params);
571 if (ret) {
572 DP_NOTICE(p_hwfn, "Failed to allocate SPQ chain\n");
573 goto spq_chain_alloc_fail;
574 }
575
576 /* allocate and fill the SPQ elements (incl. ramrod data list) */
577 capacity = qed_chain_get_capacity(&p_spq->chain);
578 ret = -ENOMEM;
579
580 p_virt = dma_alloc_coherent(&cdev->pdev->dev,
581 capacity * sizeof(struct qed_spq_entry),
582 &p_phys, GFP_KERNEL);
583 if (!p_virt)
584 goto spq_alloc_fail;
585
586 p_spq->p_virt = p_virt;
587 p_spq->p_phys = p_phys;
588 p_hwfn->p_spq = p_spq;
589
590 return 0;
591
592 spq_alloc_fail:
593 qed_chain_free(cdev, &p_spq->chain);
594 spq_chain_alloc_fail:
595 kfree(p_spq);
596
597 return ret;
598 }
599
600 void qed_spq_free(struct qed_hwfn *p_hwfn)
601 {
602 struct qed_spq *p_spq = p_hwfn->p_spq;
603 void __iomem *db_addr;
604 u32 capacity;
605
606 if (!p_spq)
607 return;
608
609 /* Delete the SPQ doorbell from the doorbell recovery mechanism */
610 db_addr = (void __iomem *)((u8 __iomem *)p_hwfn->doorbells +
611 p_spq->db_addr_offset);
612 qed_db_recovery_del(p_hwfn->cdev, db_addr, &p_spq->db_data);
613
614 if (p_spq->p_virt) {
615 capacity = qed_chain_get_capacity(&p_spq->chain);
616 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
617 capacity *
618 sizeof(struct qed_spq_entry),
619 p_spq->p_virt, p_spq->p_phys);
620 }
621
622 qed_chain_free(p_hwfn->cdev, &p_spq->chain);
623 kfree(p_spq);
624 p_hwfn->p_spq = NULL;
625 }
626
627 int qed_spq_get_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry **pp_ent)
628 {
629 struct qed_spq *p_spq = p_hwfn->p_spq;
630 struct qed_spq_entry *p_ent = NULL;
631 int rc = 0;
632
633 spin_lock_bh(&p_spq->lock);
634
635 if (list_empty(&p_spq->free_pool)) {
636 p_ent = kzalloc(sizeof(*p_ent), GFP_ATOMIC);
637 if (!p_ent) {
638 DP_NOTICE(p_hwfn,
639 "Failed to allocate an SPQ entry for a pending ramrod\n");
640 rc = -ENOMEM;
641 goto out_unlock;
642 }
643 p_ent->queue = &p_spq->unlimited_pending;
644 } else {
645 p_ent = list_first_entry(&p_spq->free_pool,
646 struct qed_spq_entry, list);
647 list_del(&p_ent->list);
648 p_ent->queue = &p_spq->pending;
649 }
650
651 *pp_ent = p_ent;
652
653 out_unlock:
654 spin_unlock_bh(&p_spq->lock);
655 return rc;
656 }
657
658 /* Locked variant; Should be called while the SPQ lock is taken */
659 static void __qed_spq_return_entry(struct qed_hwfn *p_hwfn,
660 struct qed_spq_entry *p_ent)
661 {
662 list_add_tail(&p_ent->list, &p_hwfn->p_spq->free_pool);
663 }
664
665 void qed_spq_return_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry *p_ent)
666 {
667 spin_lock_bh(&p_hwfn->p_spq->lock);
668 __qed_spq_return_entry(p_hwfn, p_ent);
669 spin_unlock_bh(&p_hwfn->p_spq->lock);
670 }
671
672 /**
673 * qed_spq_add_entry() - Add a new entry to the pending list.
674 * Should be used while lock is being held.
675 *
676 * @p_hwfn: HW device data.
677 * @p_ent: An entry to add.
678 * @priority: Desired priority.
679 *
680 * Adds an entry to the pending list is there is room (an empty
681 * element is available in the free_pool), or else places the
682 * entry in the unlimited_pending pool.
683 *
684 * Return: zero on success, -EINVAL on invalid @priority.
685 */
686 static int qed_spq_add_entry(struct qed_hwfn *p_hwfn,
687 struct qed_spq_entry *p_ent,
688 enum spq_priority priority)
689 {
690 struct qed_spq *p_spq = p_hwfn->p_spq;
691
692 if (p_ent->queue == &p_spq->unlimited_pending) {
693 if (list_empty(&p_spq->free_pool)) {
694 list_add_tail(&p_ent->list, &p_spq->unlimited_pending);
695 p_spq->unlimited_pending_count++;
696
697 return 0;
698 } else {
699 struct qed_spq_entry *p_en2;
700
701 p_en2 = list_first_entry(&p_spq->free_pool,
702 struct qed_spq_entry, list);
703 list_del(&p_en2->list);
704
705 /* Copy the ring element physical pointer to the new
706 * entry, since we are about to override the entire ring
707 * entry and don't want to lose the pointer.
708 */
709 p_ent->elem.data_ptr = p_en2->elem.data_ptr;
710
711 *p_en2 = *p_ent;
712
713 /* EBLOCK responsible to free the allocated p_ent */
714 if (p_ent->comp_mode != QED_SPQ_MODE_EBLOCK)
715 kfree(p_ent);
716 else
717 p_ent->post_ent = p_en2;
718
719 p_ent = p_en2;
720 }
721 }
722
723 /* entry is to be placed in 'pending' queue */
724 switch (priority) {
725 case QED_SPQ_PRIORITY_NORMAL:
726 list_add_tail(&p_ent->list, &p_spq->pending);
727 p_spq->normal_count++;
728 break;
729 case QED_SPQ_PRIORITY_HIGH:
730 list_add(&p_ent->list, &p_spq->pending);
731 p_spq->high_count++;
732 break;
733 default:
734 return -EINVAL;
735 }
736
737 return 0;
738 }
739
740 /***************************************************************************
741 * Accessor
742 ***************************************************************************/
743 u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn)
744 {
745 if (!p_hwfn->p_spq)
746 return 0xffffffff; /* illegal */
747 return p_hwfn->p_spq->cid;
748 }
749
750 /***************************************************************************
751 * Posting new Ramrods
752 ***************************************************************************/
753 static int qed_spq_post_list(struct qed_hwfn *p_hwfn,
754 struct list_head *head, u32 keep_reserve)
755 {
756 struct qed_spq *p_spq = p_hwfn->p_spq;
757 int rc;
758
759 while (qed_chain_get_elem_left(&p_spq->chain) > keep_reserve &&
760 !list_empty(head)) {
761 struct qed_spq_entry *p_ent =
762 list_first_entry(head, struct qed_spq_entry, list);
763 list_move_tail(&p_ent->list, &p_spq->completion_pending);
764 p_spq->comp_sent_count++;
765
766 rc = qed_spq_hw_post(p_hwfn, p_spq, p_ent);
767 if (rc) {
768 list_del(&p_ent->list);
769 __qed_spq_return_entry(p_hwfn, p_ent);
770 return rc;
771 }
772 }
773
774 return 0;
775 }
776
777 int qed_spq_pend_post(struct qed_hwfn *p_hwfn)
778 {
779 struct qed_spq *p_spq = p_hwfn->p_spq;
780 struct qed_spq_entry *p_ent = NULL;
781
782 while (!list_empty(&p_spq->free_pool)) {
783 if (list_empty(&p_spq->unlimited_pending))
784 break;
785
786 p_ent = list_first_entry(&p_spq->unlimited_pending,
787 struct qed_spq_entry, list);
788 if (!p_ent)
789 return -EINVAL;
790
791 list_del(&p_ent->list);
792
793 qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority);
794 }
795
796 return qed_spq_post_list(p_hwfn, &p_spq->pending,
797 SPQ_HIGH_PRI_RESERVE_DEFAULT);
798 }
799
800 static void qed_spq_recov_set_ret_code(struct qed_spq_entry *p_ent,
801 u8 *fw_return_code)
802 {
803 if (!fw_return_code)
804 return;
805
806 if (p_ent->elem.hdr.protocol_id == PROTOCOLID_ROCE ||
807 p_ent->elem.hdr.protocol_id == PROTOCOLID_IWARP)
808 *fw_return_code = RDMA_RETURN_OK;
809 }
810
811 /* Avoid overriding of SPQ entries when getting out-of-order completions, by
812 * marking the completions in a bitmap and increasing the chain consumer only
813 * for the first successive completed entries.
814 */
815 static void qed_spq_comp_bmap_update(struct qed_hwfn *p_hwfn, __le16 echo)
816 {
817 u16 pos = le16_to_cpu(echo) % SPQ_RING_SIZE;
818 struct qed_spq *p_spq = p_hwfn->p_spq;
819
820 __set_bit(pos, p_spq->p_comp_bitmap);
821 while (test_bit(p_spq->comp_bitmap_idx,
822 p_spq->p_comp_bitmap)) {
823 __clear_bit(p_spq->comp_bitmap_idx,
824 p_spq->p_comp_bitmap);
825 p_spq->comp_bitmap_idx++;
826 qed_chain_return_produced(&p_spq->chain);
827 }
828 }
829
830 int qed_spq_post(struct qed_hwfn *p_hwfn,
831 struct qed_spq_entry *p_ent, u8 *fw_return_code)
832 {
833 int rc = 0;
834 struct qed_spq *p_spq = p_hwfn ? p_hwfn->p_spq : NULL;
835 bool b_ret_ent = true;
836 bool eblock;
837
838 if (!p_hwfn)
839 return -EINVAL;
840
841 if (!p_ent) {
842 DP_NOTICE(p_hwfn, "Got a NULL pointer\n");
843 return -EINVAL;
844 }
845
846 if (p_hwfn->cdev->recov_in_prog) {
847 DP_VERBOSE(p_hwfn,
848 QED_MSG_SPQ,
849 "Recovery is in progress. Skip spq post [%s:%02x %s:%02x]\n",
850 qed_get_ramrod_cmd_id_str(p_ent->elem.hdr.protocol_id,
851 p_ent->elem.hdr.cmd_id),
852 p_ent->elem.hdr.cmd_id,
853 qed_get_protocol_type_str(p_ent->elem.hdr.protocol_id),
854 p_ent->elem.hdr.protocol_id);
855
856 /* Let the flow complete w/o any error handling */
857 qed_spq_recov_set_ret_code(p_ent, fw_return_code);
858 return 0;
859 }
860
861 /* Complete the entry */
862 rc = qed_spq_fill_entry(p_hwfn, p_ent);
863
864 spin_lock_bh(&p_spq->lock);
865
866 /* Check return value after LOCK is taken for cleaner error flow */
867 if (rc)
868 goto spq_post_fail;
869
870 /* Check if entry is in block mode before qed_spq_add_entry,
871 * which might kfree p_ent.
872 */
873 eblock = (p_ent->comp_mode == QED_SPQ_MODE_EBLOCK);
874
875 /* Add the request to the pending queue */
876 rc = qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority);
877 if (rc)
878 goto spq_post_fail;
879
880 rc = qed_spq_pend_post(p_hwfn);
881 if (rc) {
882 /* Since it's possible that pending failed for a different
883 * entry [although unlikely], the failed entry was already
884 * dealt with; No need to return it here.
885 */
886 b_ret_ent = false;
887 goto spq_post_fail;
888 }
889
890 spin_unlock_bh(&p_spq->lock);
891
892 if (eblock) {
893 /* For entries in QED BLOCK mode, the completion code cannot
894 * perform the necessary cleanup - if it did, we couldn't
895 * access p_ent here to see whether it's successful or not.
896 * Thus, after gaining the answer perform the cleanup here.
897 */
898 rc = qed_spq_block(p_hwfn, p_ent, fw_return_code,
899 p_ent->queue == &p_spq->unlimited_pending);
900
901 if (p_ent->queue == &p_spq->unlimited_pending) {
902 struct qed_spq_entry *p_post_ent = p_ent->post_ent;
903
904 kfree(p_ent);
905
906 /* Return the entry which was actually posted */
907 p_ent = p_post_ent;
908 }
909
910 if (rc)
911 goto spq_post_fail2;
912
913 /* return to pool */
914 qed_spq_return_entry(p_hwfn, p_ent);
915 }
916 return rc;
917
918 spq_post_fail2:
919 spin_lock_bh(&p_spq->lock);
920 list_del(&p_ent->list);
921 qed_spq_comp_bmap_update(p_hwfn, p_ent->elem.hdr.echo);
922
923 spq_post_fail:
924 /* return to the free pool */
925 if (b_ret_ent)
926 __qed_spq_return_entry(p_hwfn, p_ent);
927 spin_unlock_bh(&p_spq->lock);
928
929 return rc;
930 }
931
932 int qed_spq_completion(struct qed_hwfn *p_hwfn,
933 __le16 echo,
934 u8 fw_return_code,
935 union event_ring_data *p_data)
936 {
937 struct qed_spq *p_spq;
938 struct qed_spq_entry *p_ent = NULL;
939 struct qed_spq_entry *tmp;
940 struct qed_spq_entry *found = NULL;
941
942 if (!p_hwfn)
943 return -EINVAL;
944
945 p_spq = p_hwfn->p_spq;
946 if (!p_spq)
947 return -EINVAL;
948
949 spin_lock_bh(&p_spq->lock);
950 list_for_each_entry_safe(p_ent, tmp, &p_spq->completion_pending, list) {
951 if (p_ent->elem.hdr.echo == echo) {
952 list_del(&p_ent->list);
953 qed_spq_comp_bmap_update(p_hwfn, echo);
954 p_spq->comp_count++;
955 found = p_ent;
956 break;
957 }
958
959 /* This is relatively uncommon - depends on scenarios
960 * which have mutliple per-PF sent ramrods.
961 */
962 DP_VERBOSE(p_hwfn, QED_MSG_SPQ,
963 "Got completion for echo %04x - doesn't match echo %04x in completion pending list\n",
964 le16_to_cpu(echo),
965 le16_to_cpu(p_ent->elem.hdr.echo));
966 }
967
968 /* Release lock before callback, as callback may post
969 * an additional ramrod.
970 */
971 spin_unlock_bh(&p_spq->lock);
972
973 if (!found) {
974 DP_NOTICE(p_hwfn,
975 "Failed to find an entry this EQE [echo %04x] completes\n",
976 le16_to_cpu(echo));
977 return -EEXIST;
978 }
979
980 DP_VERBOSE(p_hwfn, QED_MSG_SPQ,
981 "Complete EQE [echo %04x]: func %p cookie %p)\n",
982 le16_to_cpu(echo),
983 p_ent->comp_cb.function, p_ent->comp_cb.cookie);
984 if (found->comp_cb.function)
985 found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data,
986 fw_return_code);
987 else
988 DP_VERBOSE(p_hwfn,
989 QED_MSG_SPQ,
990 "Got a completion without a callback function\n");
991
992 if (found->comp_mode != QED_SPQ_MODE_EBLOCK)
993 /* EBLOCK is responsible for returning its own entry into the
994 * free list.
995 */
996 qed_spq_return_entry(p_hwfn, found);
997
998 return 0;
999 }
1000
1001 #define QED_SPQ_CONSQ_ELEM_SIZE 0x80
1002
1003 int qed_consq_alloc(struct qed_hwfn *p_hwfn)
1004 {
1005 struct qed_chain_init_params params = {
1006 .mode = QED_CHAIN_MODE_PBL,
1007 .intended_use = QED_CHAIN_USE_TO_PRODUCE,
1008 .cnt_type = QED_CHAIN_CNT_TYPE_U16,
1009 .num_elems = QED_CHAIN_PAGE_SIZE / QED_SPQ_CONSQ_ELEM_SIZE,
1010 .elem_size = QED_SPQ_CONSQ_ELEM_SIZE,
1011 };
1012 struct qed_consq *p_consq;
1013 int ret;
1014
1015 /* Allocate ConsQ struct */
1016 p_consq = kzalloc(sizeof(*p_consq), GFP_KERNEL);
1017 if (!p_consq)
1018 return -ENOMEM;
1019
1020 /* Allocate and initialize ConsQ chain */
1021 ret = qed_chain_alloc(p_hwfn->cdev, &p_consq->chain, &params);
1022 if (ret) {
1023 DP_NOTICE(p_hwfn, "Failed to allocate ConsQ chain");
1024 goto consq_alloc_fail;
1025 }
1026
1027 p_hwfn->p_consq = p_consq;
1028
1029 return 0;
1030
1031 consq_alloc_fail:
1032 kfree(p_consq);
1033
1034 return ret;
1035 }
1036
1037 void qed_consq_setup(struct qed_hwfn *p_hwfn)
1038 {
1039 qed_chain_reset(&p_hwfn->p_consq->chain);
1040 }
1041
1042 void qed_consq_free(struct qed_hwfn *p_hwfn)
1043 {
1044 if (!p_hwfn->p_consq)
1045 return;
1046
1047 qed_chain_free(p_hwfn->cdev, &p_hwfn->p_consq->chain);
1048
1049 kfree(p_hwfn->p_consq);
1050 p_hwfn->p_consq = NULL;
1051 }
Kernel DRM miscellaneous fixes and cross-tree changes