1
2
3
4#include "gdma.h"
5#include "hw_channel.h"
6
7static int mana_hwc_get_msg_index(struct hw_channel_context *hwc, u16 *msg_id)
8{
9 struct gdma_resource *r = &hwc->inflight_msg_res;
10 unsigned long flags;
11 u32 index;
12
13 down(&hwc->sema);
14
15 spin_lock_irqsave(&r->lock, flags);
16
17 index = find_first_zero_bit(hwc->inflight_msg_res.map,
18 hwc->inflight_msg_res.size);
19
20 bitmap_set(hwc->inflight_msg_res.map, index, 1);
21
22 spin_unlock_irqrestore(&r->lock, flags);
23
24 *msg_id = index;
25
26 return 0;
27}
28
29static void mana_hwc_put_msg_index(struct hw_channel_context *hwc, u16 msg_id)
30{
31 struct gdma_resource *r = &hwc->inflight_msg_res;
32 unsigned long flags;
33
34 spin_lock_irqsave(&r->lock, flags);
35 bitmap_clear(hwc->inflight_msg_res.map, msg_id, 1);
36 spin_unlock_irqrestore(&r->lock, flags);
37
38 up(&hwc->sema);
39}
40
41static int mana_hwc_verify_resp_msg(const struct hwc_caller_ctx *caller_ctx,
42 const struct gdma_resp_hdr *resp_msg,
43 u32 resp_len)
44{
45 if (resp_len < sizeof(*resp_msg))
46 return -EPROTO;
47
48 if (resp_len > caller_ctx->output_buflen)
49 return -EPROTO;
50
51 return 0;
52}
53
54static void mana_hwc_handle_resp(struct hw_channel_context *hwc, u32 resp_len,
55 const struct gdma_resp_hdr *resp_msg)
56{
57 struct hwc_caller_ctx *ctx;
58 int err;
59
60 if (!test_bit(resp_msg->response.hwc_msg_id,
61 hwc->inflight_msg_res.map)) {
62 dev_err(hwc->dev, "hwc_rx: invalid msg_id = %u\n",
63 resp_msg->response.hwc_msg_id);
64 return;
65 }
66
67 ctx = hwc->caller_ctx + resp_msg->response.hwc_msg_id;
68 err = mana_hwc_verify_resp_msg(ctx, resp_msg, resp_len);
69 if (err)
70 goto out;
71
72 ctx->status_code = resp_msg->status;
73
74 memcpy(ctx->output_buf, resp_msg, resp_len);
75out:
76 ctx->error = err;
77 complete(&ctx->comp_event);
78}
79
80static int mana_hwc_post_rx_wqe(const struct hwc_wq *hwc_rxq,
81 struct hwc_work_request *req)
82{
83 struct device *dev = hwc_rxq->hwc->dev;
84 struct gdma_sge *sge;
85 int err;
86
87 sge = &req->sge;
88 sge->address = (u64)req->buf_sge_addr;
89 sge->mem_key = hwc_rxq->msg_buf->gpa_mkey;
90 sge->size = req->buf_len;
91
92 memset(&req->wqe_req, 0, sizeof(struct gdma_wqe_request));
93 req->wqe_req.sgl = sge;
94 req->wqe_req.num_sge = 1;
95 req->wqe_req.client_data_unit = 0;
96
97 err = mana_gd_post_and_ring(hwc_rxq->gdma_wq, &req->wqe_req, NULL);
98 if (err)
99 dev_err(dev, "Failed to post WQE on HWC RQ: %d\n", err);
100 return err;
101}
102
103static void mana_hwc_init_event_handler(void *ctx, struct gdma_queue *q_self,
104 struct gdma_event *event)
105{
106 struct hw_channel_context *hwc = ctx;
107 struct gdma_dev *gd = hwc->gdma_dev;
108 union hwc_init_type_data type_data;
109 union hwc_init_eq_id_db eq_db;
110 u32 type, val;
111
112 switch (event->type) {
113 case GDMA_EQE_HWC_INIT_EQ_ID_DB:
114 eq_db.as_uint32 = event->details[0];
115 hwc->cq->gdma_eq->id = eq_db.eq_id;
116 gd->doorbell = eq_db.doorbell;
117 break;
118
119 case GDMA_EQE_HWC_INIT_DATA:
120 type_data.as_uint32 = event->details[0];
121 type = type_data.type;
122 val = type_data.value;
123
124 switch (type) {
125 case HWC_INIT_DATA_CQID:
126 hwc->cq->gdma_cq->id = val;
127 break;
128
129 case HWC_INIT_DATA_RQID:
130 hwc->rxq->gdma_wq->id = val;
131 break;
132
133 case HWC_INIT_DATA_SQID:
134 hwc->txq->gdma_wq->id = val;
135 break;
136
137 case HWC_INIT_DATA_QUEUE_DEPTH:
138 hwc->hwc_init_q_depth_max = (u16)val;
139 break;
140
141 case HWC_INIT_DATA_MAX_REQUEST:
142 hwc->hwc_init_max_req_msg_size = val;
143 break;
144
145 case HWC_INIT_DATA_MAX_RESPONSE:
146 hwc->hwc_init_max_resp_msg_size = val;
147 break;
148
149 case HWC_INIT_DATA_MAX_NUM_CQS:
150 gd->gdma_context->max_num_cqs = val;
151 break;
152
153 case HWC_INIT_DATA_PDID:
154 hwc->gdma_dev->pdid = val;
155 break;
156
157 case HWC_INIT_DATA_GPA_MKEY:
158 hwc->rxq->msg_buf->gpa_mkey = val;
159 hwc->txq->msg_buf->gpa_mkey = val;
160 break;
161 }
162
163 break;
164
165 case GDMA_EQE_HWC_INIT_DONE:
166 complete(&hwc->hwc_init_eqe_comp);
167 break;
168
169 default:
170
171 break;
172 }
173}
174
175static void mana_hwc_rx_event_handler(void *ctx, u32 gdma_rxq_id,
176 const struct hwc_rx_oob *rx_oob)
177{
178 struct hw_channel_context *hwc = ctx;
179 struct hwc_wq *hwc_rxq = hwc->rxq;
180 struct hwc_work_request *rx_req;
181 struct gdma_resp_hdr *resp;
182 struct gdma_wqe *dma_oob;
183 struct gdma_queue *rq;
184 struct gdma_sge *sge;
185 u64 rq_base_addr;
186 u64 rx_req_idx;
187 u8 *wqe;
188
189 if (WARN_ON_ONCE(hwc_rxq->gdma_wq->id != gdma_rxq_id))
190 return;
191
192 rq = hwc_rxq->gdma_wq;
193 wqe = mana_gd_get_wqe_ptr(rq, rx_oob->wqe_offset / GDMA_WQE_BU_SIZE);
194 dma_oob = (struct gdma_wqe *)wqe;
195
196 sge = (struct gdma_sge *)(wqe + 8 + dma_oob->inline_oob_size_div4 * 4);
197
198
199 rq_base_addr = hwc_rxq->msg_buf->mem_info.dma_handle;
200 rx_req_idx = (sge->address - rq_base_addr) / hwc->max_req_msg_size;
201
202 rx_req = &hwc_rxq->msg_buf->reqs[rx_req_idx];
203 resp = (struct gdma_resp_hdr *)rx_req->buf_va;
204
205 if (resp->response.hwc_msg_id >= hwc->num_inflight_msg) {
206 dev_err(hwc->dev, "HWC RX: wrong msg_id=%u\n",
207 resp->response.hwc_msg_id);
208 return;
209 }
210
211 mana_hwc_handle_resp(hwc, rx_oob->tx_oob_data_size, resp);
212
213
214
215
216 resp = NULL;
217
218 mana_hwc_post_rx_wqe(hwc_rxq, rx_req);
219}
220
221static void mana_hwc_tx_event_handler(void *ctx, u32 gdma_txq_id,
222 const struct hwc_rx_oob *rx_oob)
223{
224 struct hw_channel_context *hwc = ctx;
225 struct hwc_wq *hwc_txq = hwc->txq;
226
227 WARN_ON_ONCE(!hwc_txq || hwc_txq->gdma_wq->id != gdma_txq_id);
228}
229
230static int mana_hwc_create_gdma_wq(struct hw_channel_context *hwc,
231 enum gdma_queue_type type, u64 queue_size,
232 struct gdma_queue **queue)
233{
234 struct gdma_queue_spec spec = {};
235
236 if (type != GDMA_SQ && type != GDMA_RQ)
237 return -EINVAL;
238
239 spec.type = type;
240 spec.monitor_avl_buf = false;
241 spec.queue_size = queue_size;
242
243 return mana_gd_create_hwc_queue(hwc->gdma_dev, &spec, queue);
244}
245
246static int mana_hwc_create_gdma_cq(struct hw_channel_context *hwc,
247 u64 queue_size,
248 void *ctx, gdma_cq_callback *cb,
249 struct gdma_queue *parent_eq,
250 struct gdma_queue **queue)
251{
252 struct gdma_queue_spec spec = {};
253
254 spec.type = GDMA_CQ;
255 spec.monitor_avl_buf = false;
256 spec.queue_size = queue_size;
257 spec.cq.context = ctx;
258 spec.cq.callback = cb;
259 spec.cq.parent_eq = parent_eq;
260
261 return mana_gd_create_hwc_queue(hwc->gdma_dev, &spec, queue);
262}
263
264static int mana_hwc_create_gdma_eq(struct hw_channel_context *hwc,
265 u64 queue_size,
266 void *ctx, gdma_eq_callback *cb,
267 struct gdma_queue **queue)
268{
269 struct gdma_queue_spec spec = {};
270
271 spec.type = GDMA_EQ;
272 spec.monitor_avl_buf = false;
273 spec.queue_size = queue_size;
274 spec.eq.context = ctx;
275 spec.eq.callback = cb;
276 spec.eq.log2_throttle_limit = DEFAULT_LOG2_THROTTLING_FOR_ERROR_EQ;
277
278 return mana_gd_create_hwc_queue(hwc->gdma_dev, &spec, queue);
279}
280
281static void mana_hwc_comp_event(void *ctx, struct gdma_queue *q_self)
282{
283 struct hwc_rx_oob comp_data = {};
284 struct gdma_comp *completions;
285 struct hwc_cq *hwc_cq = ctx;
286 int comp_read, i;
287
288 WARN_ON_ONCE(hwc_cq->gdma_cq != q_self);
289
290 completions = hwc_cq->comp_buf;
291 comp_read = mana_gd_poll_cq(q_self, completions, hwc_cq->queue_depth);
292 WARN_ON_ONCE(comp_read <= 0 || comp_read > hwc_cq->queue_depth);
293
294 for (i = 0; i < comp_read; ++i) {
295 comp_data = *(struct hwc_rx_oob *)completions[i].cqe_data;
296
297 if (completions[i].is_sq)
298 hwc_cq->tx_event_handler(hwc_cq->tx_event_ctx,
299 completions[i].wq_num,
300 &comp_data);
301 else
302 hwc_cq->rx_event_handler(hwc_cq->rx_event_ctx,
303 completions[i].wq_num,
304 &comp_data);
305 }
306
307 mana_gd_arm_cq(q_self);
308}
309
310static void mana_hwc_destroy_cq(struct gdma_context *gc, struct hwc_cq *hwc_cq)
311{
312 if (!hwc_cq)
313 return;
314
315 kfree(hwc_cq->comp_buf);
316
317 if (hwc_cq->gdma_cq)
318 mana_gd_destroy_queue(gc, hwc_cq->gdma_cq);
319
320 if (hwc_cq->gdma_eq)
321 mana_gd_destroy_queue(gc, hwc_cq->gdma_eq);
322
323 kfree(hwc_cq);
324}
325
326static int mana_hwc_create_cq(struct hw_channel_context *hwc, u16 q_depth,
327 gdma_eq_callback *callback, void *ctx,
328 hwc_rx_event_handler_t *rx_ev_hdlr,
329 void *rx_ev_ctx,
330 hwc_tx_event_handler_t *tx_ev_hdlr,
331 void *tx_ev_ctx, struct hwc_cq **hwc_cq_ptr)
332{
333 struct gdma_queue *eq, *cq;
334 struct gdma_comp *comp_buf;
335 struct hwc_cq *hwc_cq;
336 u32 eq_size, cq_size;
337 int err;
338
339 eq_size = roundup_pow_of_two(GDMA_EQE_SIZE * q_depth);
340 if (eq_size < MINIMUM_SUPPORTED_PAGE_SIZE)
341 eq_size = MINIMUM_SUPPORTED_PAGE_SIZE;
342
343 cq_size = roundup_pow_of_two(GDMA_CQE_SIZE * q_depth);
344 if (cq_size < MINIMUM_SUPPORTED_PAGE_SIZE)
345 cq_size = MINIMUM_SUPPORTED_PAGE_SIZE;
346
347 hwc_cq = kzalloc(sizeof(*hwc_cq), GFP_KERNEL);
348 if (!hwc_cq)
349 return -ENOMEM;
350
351 err = mana_hwc_create_gdma_eq(hwc, eq_size, ctx, callback, &eq);
352 if (err) {
353 dev_err(hwc->dev, "Failed to create HWC EQ for RQ: %d\n", err);
354 goto out;
355 }
356 hwc_cq->gdma_eq = eq;
357
358 err = mana_hwc_create_gdma_cq(hwc, cq_size, hwc_cq, mana_hwc_comp_event,
359 eq, &cq);
360 if (err) {
361 dev_err(hwc->dev, "Failed to create HWC CQ for RQ: %d\n", err);
362 goto out;
363 }
364 hwc_cq->gdma_cq = cq;
365
366 comp_buf = kcalloc(q_depth, sizeof(struct gdma_comp), GFP_KERNEL);
367 if (!comp_buf) {
368 err = -ENOMEM;
369 goto out;
370 }
371
372 hwc_cq->hwc = hwc;
373 hwc_cq->comp_buf = comp_buf;
374 hwc_cq->queue_depth = q_depth;
375 hwc_cq->rx_event_handler = rx_ev_hdlr;
376 hwc_cq->rx_event_ctx = rx_ev_ctx;
377 hwc_cq->tx_event_handler = tx_ev_hdlr;
378 hwc_cq->tx_event_ctx = tx_ev_ctx;
379
380 *hwc_cq_ptr = hwc_cq;
381 return 0;
382out:
383 mana_hwc_destroy_cq(hwc->gdma_dev->gdma_context, hwc_cq);
384 return err;
385}
386
387static int mana_hwc_alloc_dma_buf(struct hw_channel_context *hwc, u16 q_depth,
388 u32 max_msg_size,
389 struct hwc_dma_buf **dma_buf_ptr)
390{
391 struct gdma_context *gc = hwc->gdma_dev->gdma_context;
392 struct hwc_work_request *hwc_wr;
393 struct hwc_dma_buf *dma_buf;
394 struct gdma_mem_info *gmi;
395 void *virt_addr;
396 u32 buf_size;
397 u8 *base_pa;
398 int err;
399 u16 i;
400
401 dma_buf = kzalloc(sizeof(*dma_buf) +
402 q_depth * sizeof(struct hwc_work_request),
403 GFP_KERNEL);
404 if (!dma_buf)
405 return -ENOMEM;
406
407 dma_buf->num_reqs = q_depth;
408
409 buf_size = PAGE_ALIGN(q_depth * max_msg_size);
410
411 gmi = &dma_buf->mem_info;
412 err = mana_gd_alloc_memory(gc, buf_size, gmi);
413 if (err) {
414 dev_err(hwc->dev, "Failed to allocate DMA buffer: %d\n", err);
415 goto out;
416 }
417
418 virt_addr = dma_buf->mem_info.virt_addr;
419 base_pa = (u8 *)dma_buf->mem_info.dma_handle;
420
421 for (i = 0; i < q_depth; i++) {
422 hwc_wr = &dma_buf->reqs[i];
423
424 hwc_wr->buf_va = virt_addr + i * max_msg_size;
425 hwc_wr->buf_sge_addr = base_pa + i * max_msg_size;
426
427 hwc_wr->buf_len = max_msg_size;
428 }
429
430 *dma_buf_ptr = dma_buf;
431 return 0;
432out:
433 kfree(dma_buf);
434 return err;
435}
436
437static void mana_hwc_dealloc_dma_buf(struct hw_channel_context *hwc,
438 struct hwc_dma_buf *dma_buf)
439{
440 if (!dma_buf)
441 return;
442
443 mana_gd_free_memory(&dma_buf->mem_info);
444
445 kfree(dma_buf);
446}
447
448static void mana_hwc_destroy_wq(struct hw_channel_context *hwc,
449 struct hwc_wq *hwc_wq)
450{
451 if (!hwc_wq)
452 return;
453
454 mana_hwc_dealloc_dma_buf(hwc, hwc_wq->msg_buf);
455
456 if (hwc_wq->gdma_wq)
457 mana_gd_destroy_queue(hwc->gdma_dev->gdma_context,
458 hwc_wq->gdma_wq);
459
460 kfree(hwc_wq);
461}
462
463static int mana_hwc_create_wq(struct hw_channel_context *hwc,
464 enum gdma_queue_type q_type, u16 q_depth,
465 u32 max_msg_size, struct hwc_cq *hwc_cq,
466 struct hwc_wq **hwc_wq_ptr)
467{
468 struct gdma_queue *queue;
469 struct hwc_wq *hwc_wq;
470 u32 queue_size;
471 int err;
472
473 WARN_ON(q_type != GDMA_SQ && q_type != GDMA_RQ);
474
475 if (q_type == GDMA_RQ)
476 queue_size = roundup_pow_of_two(GDMA_MAX_RQE_SIZE * q_depth);
477 else
478 queue_size = roundup_pow_of_two(GDMA_MAX_SQE_SIZE * q_depth);
479
480 if (queue_size < MINIMUM_SUPPORTED_PAGE_SIZE)
481 queue_size = MINIMUM_SUPPORTED_PAGE_SIZE;
482
483 hwc_wq = kzalloc(sizeof(*hwc_wq), GFP_KERNEL);
484 if (!hwc_wq)
485 return -ENOMEM;
486
487 err = mana_hwc_create_gdma_wq(hwc, q_type, queue_size, &queue);
488 if (err)
489 goto out;
490
491 err = mana_hwc_alloc_dma_buf(hwc, q_depth, max_msg_size,
492 &hwc_wq->msg_buf);
493 if (err)
494 goto out;
495
496 hwc_wq->hwc = hwc;
497 hwc_wq->gdma_wq = queue;
498 hwc_wq->queue_depth = q_depth;
499 hwc_wq->hwc_cq = hwc_cq;
500
501 *hwc_wq_ptr = hwc_wq;
502 return 0;
503out:
504 if (err)
505 mana_hwc_destroy_wq(hwc, hwc_wq);
506 return err;
507}
508
509static int mana_hwc_post_tx_wqe(const struct hwc_wq *hwc_txq,
510 struct hwc_work_request *req,
511 u32 dest_virt_rq_id, u32 dest_virt_rcq_id,
512 bool dest_pf)
513{
514 struct device *dev = hwc_txq->hwc->dev;
515 struct hwc_tx_oob *tx_oob;
516 struct gdma_sge *sge;
517 int err;
518
519 if (req->msg_size == 0 || req->msg_size > req->buf_len) {
520 dev_err(dev, "wrong msg_size: %u, buf_len: %u\n",
521 req->msg_size, req->buf_len);
522 return -EINVAL;
523 }
524
525 tx_oob = &req->tx_oob;
526
527 tx_oob->vrq_id = dest_virt_rq_id;
528 tx_oob->dest_vfid = 0;
529 tx_oob->vrcq_id = dest_virt_rcq_id;
530 tx_oob->vscq_id = hwc_txq->hwc_cq->gdma_cq->id;
531 tx_oob->loopback = false;
532 tx_oob->lso_override = false;
533 tx_oob->dest_pf = dest_pf;
534 tx_oob->vsq_id = hwc_txq->gdma_wq->id;
535
536 sge = &req->sge;
537 sge->address = (u64)req->buf_sge_addr;
538 sge->mem_key = hwc_txq->msg_buf->gpa_mkey;
539 sge->size = req->msg_size;
540
541 memset(&req->wqe_req, 0, sizeof(struct gdma_wqe_request));
542 req->wqe_req.sgl = sge;
543 req->wqe_req.num_sge = 1;
544 req->wqe_req.inline_oob_size = sizeof(struct hwc_tx_oob);
545 req->wqe_req.inline_oob_data = tx_oob;
546 req->wqe_req.client_data_unit = 0;
547
548 err = mana_gd_post_and_ring(hwc_txq->gdma_wq, &req->wqe_req, NULL);
549 if (err)
550 dev_err(dev, "Failed to post WQE on HWC SQ: %d\n", err);
551 return err;
552}
553
554static int mana_hwc_init_inflight_msg(struct hw_channel_context *hwc,
555 u16 num_msg)
556{
557 int err;
558
559 sema_init(&hwc->sema, num_msg);
560
561 err = mana_gd_alloc_res_map(num_msg, &hwc->inflight_msg_res);
562 if (err)
563 dev_err(hwc->dev, "Failed to init inflight_msg_res: %d\n", err);
564 return err;
565}
566
567static int mana_hwc_test_channel(struct hw_channel_context *hwc, u16 q_depth,
568 u32 max_req_msg_size, u32 max_resp_msg_size)
569{
570 struct gdma_context *gc = hwc->gdma_dev->gdma_context;
571 struct hwc_wq *hwc_rxq = hwc->rxq;
572 struct hwc_work_request *req;
573 struct hwc_caller_ctx *ctx;
574 int err;
575 int i;
576
577
578 for (i = 0; i < q_depth; i++) {
579 req = &hwc_rxq->msg_buf->reqs[i];
580 err = mana_hwc_post_rx_wqe(hwc_rxq, req);
581 if (err)
582 return err;
583 }
584
585 ctx = kzalloc(q_depth * sizeof(struct hwc_caller_ctx), GFP_KERNEL);
586 if (!ctx)
587 return -ENOMEM;
588
589 for (i = 0; i < q_depth; ++i)
590 init_completion(&ctx[i].comp_event);
591
592 hwc->caller_ctx = ctx;
593
594 return mana_gd_test_eq(gc, hwc->cq->gdma_eq);
595}
596
597static int mana_hwc_establish_channel(struct gdma_context *gc, u16 *q_depth,
598 u32 *max_req_msg_size,
599 u32 *max_resp_msg_size)
600{
601 struct hw_channel_context *hwc = gc->hwc.driver_data;
602 struct gdma_queue *rq = hwc->rxq->gdma_wq;
603 struct gdma_queue *sq = hwc->txq->gdma_wq;
604 struct gdma_queue *eq = hwc->cq->gdma_eq;
605 struct gdma_queue *cq = hwc->cq->gdma_cq;
606 int err;
607
608 init_completion(&hwc->hwc_init_eqe_comp);
609
610 err = mana_smc_setup_hwc(&gc->shm_channel, false,
611 eq->mem_info.dma_handle,
612 cq->mem_info.dma_handle,
613 rq->mem_info.dma_handle,
614 sq->mem_info.dma_handle,
615 eq->eq.msix_index);
616 if (err)
617 return err;
618
619 if (!wait_for_completion_timeout(&hwc->hwc_init_eqe_comp, 60 * HZ))
620 return -ETIMEDOUT;
621
622 *q_depth = hwc->hwc_init_q_depth_max;
623 *max_req_msg_size = hwc->hwc_init_max_req_msg_size;
624 *max_resp_msg_size = hwc->hwc_init_max_resp_msg_size;
625
626 if (WARN_ON(cq->id >= gc->max_num_cqs))
627 return -EPROTO;
628
629 gc->cq_table = vzalloc(gc->max_num_cqs * sizeof(struct gdma_queue *));
630 if (!gc->cq_table)
631 return -ENOMEM;
632
633 gc->cq_table[cq->id] = cq;
634
635 return 0;
636}
637
638static int mana_hwc_init_queues(struct hw_channel_context *hwc, u16 q_depth,
639 u32 max_req_msg_size, u32 max_resp_msg_size)
640{
641 struct hwc_wq *hwc_rxq = NULL;
642 struct hwc_wq *hwc_txq = NULL;
643 struct hwc_cq *hwc_cq = NULL;
644 int err;
645
646 err = mana_hwc_init_inflight_msg(hwc, q_depth);
647 if (err)
648 return err;
649
650
651
652
653 err = mana_hwc_create_cq(hwc, q_depth * 2,
654 mana_hwc_init_event_handler, hwc,
655 mana_hwc_rx_event_handler, hwc,
656 mana_hwc_tx_event_handler, hwc, &hwc_cq);
657 if (err) {
658 dev_err(hwc->dev, "Failed to create HWC CQ: %d\n", err);
659 goto out;
660 }
661 hwc->cq = hwc_cq;
662
663 err = mana_hwc_create_wq(hwc, GDMA_RQ, q_depth, max_req_msg_size,
664 hwc_cq, &hwc_rxq);
665 if (err) {
666 dev_err(hwc->dev, "Failed to create HWC RQ: %d\n", err);
667 goto out;
668 }
669 hwc->rxq = hwc_rxq;
670
671 err = mana_hwc_create_wq(hwc, GDMA_SQ, q_depth, max_resp_msg_size,
672 hwc_cq, &hwc_txq);
673 if (err) {
674 dev_err(hwc->dev, "Failed to create HWC SQ: %d\n", err);
675 goto out;
676 }
677 hwc->txq = hwc_txq;
678
679 hwc->num_inflight_msg = q_depth;
680 hwc->max_req_msg_size = max_req_msg_size;
681
682 return 0;
683out:
684 if (hwc_txq)
685 mana_hwc_destroy_wq(hwc, hwc_txq);
686
687 if (hwc_rxq)
688 mana_hwc_destroy_wq(hwc, hwc_rxq);
689
690 if (hwc_cq)
691 mana_hwc_destroy_cq(hwc->gdma_dev->gdma_context, hwc_cq);
692
693 mana_gd_free_res_map(&hwc->inflight_msg_res);
694 return err;
695}
696
697int mana_hwc_create_channel(struct gdma_context *gc)
698{
699 u32 max_req_msg_size, max_resp_msg_size;
700 struct gdma_dev *gd = &gc->hwc;
701 struct hw_channel_context *hwc;
702 u16 q_depth_max;
703 int err;
704
705 hwc = kzalloc(sizeof(*hwc), GFP_KERNEL);
706 if (!hwc)
707 return -ENOMEM;
708
709 gd->gdma_context = gc;
710 gd->driver_data = hwc;
711 hwc->gdma_dev = gd;
712 hwc->dev = gc->dev;
713
714
715 gd->dev_id.as_uint32 = 0;
716 gd->dev_id.type = GDMA_DEVICE_HWC;
717
718 gd->pdid = INVALID_PDID;
719 gd->doorbell = INVALID_DOORBELL;
720
721 err = mana_hwc_init_queues(hwc, HW_CHANNEL_VF_BOOTSTRAP_QUEUE_DEPTH,
722 HW_CHANNEL_MAX_REQUEST_SIZE,
723 HW_CHANNEL_MAX_RESPONSE_SIZE);
724 if (err) {
725 dev_err(hwc->dev, "Failed to initialize HWC: %d\n", err);
726 goto out;
727 }
728
729 err = mana_hwc_establish_channel(gc, &q_depth_max, &max_req_msg_size,
730 &max_resp_msg_size);
731 if (err) {
732 dev_err(hwc->dev, "Failed to establish HWC: %d\n", err);
733 goto out;
734 }
735
736 err = mana_hwc_test_channel(gc->hwc.driver_data,
737 HW_CHANNEL_VF_BOOTSTRAP_QUEUE_DEPTH,
738 max_req_msg_size, max_resp_msg_size);
739 if (err) {
740 dev_err(hwc->dev, "Failed to test HWC: %d\n", err);
741 goto out;
742 }
743
744 return 0;
745out:
746 kfree(hwc);
747 return err;
748}
749
750void mana_hwc_destroy_channel(struct gdma_context *gc)
751{
752 struct hw_channel_context *hwc = gc->hwc.driver_data;
753 struct hwc_caller_ctx *ctx;
754
755 mana_smc_teardown_hwc(&gc->shm_channel, false);
756
757 ctx = hwc->caller_ctx;
758 kfree(ctx);
759 hwc->caller_ctx = NULL;
760
761 mana_hwc_destroy_wq(hwc, hwc->txq);
762 hwc->txq = NULL;
763
764 mana_hwc_destroy_wq(hwc, hwc->rxq);
765 hwc->rxq = NULL;
766
767 mana_hwc_destroy_cq(hwc->gdma_dev->gdma_context, hwc->cq);
768 hwc->cq = NULL;
769
770 mana_gd_free_res_map(&hwc->inflight_msg_res);
771
772 hwc->num_inflight_msg = 0;
773
774 if (hwc->gdma_dev->pdid != INVALID_PDID) {
775 hwc->gdma_dev->doorbell = INVALID_DOORBELL;
776 hwc->gdma_dev->pdid = INVALID_PDID;
777 }
778
779 kfree(hwc);
780 gc->hwc.driver_data = NULL;
781 gc->hwc.gdma_context = NULL;
782}
783
784int mana_hwc_send_request(struct hw_channel_context *hwc, u32 req_len,
785 const void *req, u32 resp_len, void *resp)
786{
787 struct hwc_work_request *tx_wr;
788 struct hwc_wq *txq = hwc->txq;
789 struct gdma_req_hdr *req_msg;
790 struct hwc_caller_ctx *ctx;
791 u16 msg_id;
792 int err;
793
794 mana_hwc_get_msg_index(hwc, &msg_id);
795
796 tx_wr = &txq->msg_buf->reqs[msg_id];
797
798 if (req_len > tx_wr->buf_len) {
799 dev_err(hwc->dev, "HWC: req msg size: %d > %d\n", req_len,
800 tx_wr->buf_len);
801 err = -EINVAL;
802 goto out;
803 }
804
805 ctx = hwc->caller_ctx + msg_id;
806 ctx->output_buf = resp;
807 ctx->output_buflen = resp_len;
808
809 req_msg = (struct gdma_req_hdr *)tx_wr->buf_va;
810 if (req)
811 memcpy(req_msg, req, req_len);
812
813 req_msg->req.hwc_msg_id = msg_id;
814
815 tx_wr->msg_size = req_len;
816
817 err = mana_hwc_post_tx_wqe(txq, tx_wr, 0, 0, false);
818 if (err) {
819 dev_err(hwc->dev, "HWC: Failed to post send WQE: %d\n", err);
820 goto out;
821 }
822
823 if (!wait_for_completion_timeout(&ctx->comp_event, 30 * HZ)) {
824 dev_err(hwc->dev, "HWC: Request timed out!\n");
825 err = -ETIMEDOUT;
826 goto out;
827 }
828
829 if (ctx->error) {
830 err = ctx->error;
831 goto out;
832 }
833
834 if (ctx->status_code) {
835 dev_err(hwc->dev, "HWC: Failed hw_channel req: 0x%x\n",
836 ctx->status_code);
837 err = -EPROTO;
838 goto out;
839 }
840out:
841 mana_hwc_put_msg_index(hwc, msg_id);
842 return err;
843}
844
