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/if_ether.h>
8 #include <linux/if_vlan.h>
9 #include <linux/ip.h>
10 #include <linux/ipv6.h>
11 #include <linux/spinlock.h>
12 #include <linux/tcp.h>
13 #include "qed_cxt.h"
14 #include "qed_hw.h"
15 #include "qed_ll2.h"
16 #include "qed_rdma.h"
17 #include "qed_reg_addr.h"
18 #include "qed_sp.h"
19 #include "qed_ooo.h"
20 
21 #define QED_IWARP_ORD_DEFAULT		32
22 #define QED_IWARP_IRD_DEFAULT		32
23 #define QED_IWARP_MAX_FW_MSS		4120
24 
25 #define QED_EP_SIG 0xecabcdef
26 
27 struct mpa_v2_hdr {
28 	__be16 ird;
29 	__be16 ord;
30 };
31 
32 #define MPA_V2_PEER2PEER_MODEL  0x8000
33 #define MPA_V2_SEND_RTR         0x4000	/* on ird */
34 #define MPA_V2_READ_RTR         0x4000	/* on ord */
35 #define MPA_V2_WRITE_RTR        0x8000
36 #define MPA_V2_IRD_ORD_MASK     0x3FFF
37 
38 #define MPA_REV2(_mpa_rev) ((_mpa_rev) == MPA_NEGOTIATION_TYPE_ENHANCED)
39 
40 #define QED_IWARP_INVALID_TCP_CID	0xffffffff
41 
42 #define QED_IWARP_RCV_WND_SIZE_DEF_BB_2P (200 * 1024)
43 #define QED_IWARP_RCV_WND_SIZE_DEF_BB_4P (100 * 1024)
44 #define QED_IWARP_RCV_WND_SIZE_DEF_AH_2P (150 * 1024)
45 #define QED_IWARP_RCV_WND_SIZE_DEF_AH_4P (90 * 1024)
46 
47 #define QED_IWARP_RCV_WND_SIZE_MIN	(0xffff)
48 #define TIMESTAMP_HEADER_SIZE		(12)
49 #define QED_IWARP_MAX_FIN_RT_DEFAULT	(2)
50 
51 #define QED_IWARP_TS_EN			BIT(0)
52 #define QED_IWARP_DA_EN			BIT(1)
53 #define QED_IWARP_PARAM_CRC_NEEDED	(1)
54 #define QED_IWARP_PARAM_P2P		(1)
55 
56 #define QED_IWARP_DEF_MAX_RT_TIME	(0)
57 #define QED_IWARP_DEF_CWND_FACTOR	(4)
58 #define QED_IWARP_DEF_KA_MAX_PROBE_CNT	(5)
59 #define QED_IWARP_DEF_KA_TIMEOUT	(1200000)	/* 20 min */
60 #define QED_IWARP_DEF_KA_INTERVAL	(1000)		/* 1 sec */
61 
62 static int qed_iwarp_async_event(struct qed_hwfn *p_hwfn, u8 fw_event_code,
63 				 __le16 echo, union event_ring_data *data,
64 				 u8 fw_return_code);
65 
66 /* Override devinfo with iWARP specific values */
67 void qed_iwarp_init_devinfo(struct qed_hwfn *p_hwfn)
68 {
69 	struct qed_rdma_device *dev = p_hwfn->p_rdma_info->dev;
70 
71 	dev->max_inline = IWARP_REQ_MAX_INLINE_DATA_SIZE;
72 	dev->max_qp = min_t(u32,
73 			    IWARP_MAX_QPS,
74 			    p_hwfn->p_rdma_info->num_qps) -
75 		      QED_IWARP_PREALLOC_CNT;
76 
77 	dev->max_cq = dev->max_qp;
78 
79 	dev->max_qp_resp_rd_atomic_resc = QED_IWARP_IRD_DEFAULT;
80 	dev->max_qp_req_rd_atomic_resc = QED_IWARP_ORD_DEFAULT;
81 }
82 
83 void qed_iwarp_init_hw(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
84 {
85 	p_hwfn->rdma_prs_search_reg = PRS_REG_SEARCH_TCP;
86 	qed_wr(p_hwfn, p_ptt, p_hwfn->rdma_prs_search_reg, 1);
87 	p_hwfn->b_rdma_enabled_in_prs = true;
88 }
89 
90 /* We have two cid maps, one for tcp which should be used only from passive
91  * syn processing and replacing a pre-allocated ep in the list. The second
92  * for active tcp and for QPs.
93  */
94 static void qed_iwarp_cid_cleaned(struct qed_hwfn *p_hwfn, u32 cid)
95 {
96 	cid -= qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);
97 
98 	spin_lock_bh(&p_hwfn->p_rdma_info->lock);
99 
100 	if (cid < QED_IWARP_PREALLOC_CNT)
101 		qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map,
102 				    cid);
103 	else
104 		qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, cid);
105 
106 	spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
107 }
108 
109 void
110 qed_iwarp_init_fw_ramrod(struct qed_hwfn *p_hwfn,
111 			 struct iwarp_init_func_ramrod_data *p_ramrod)
112 {
113 	p_ramrod->iwarp.ll2_ooo_q_index =
114 	    RESC_START(p_hwfn, QED_LL2_RAM_QUEUE) +
115 	    p_hwfn->p_rdma_info->iwarp.ll2_ooo_handle;
116 
117 	p_ramrod->tcp.tx_sws_timer = cpu_to_le16(QED_TX_SWS_TIMER_DFLT);
118 	p_ramrod->tcp.two_msl_timer = cpu_to_le32(QED_TWO_MSL_TIMER_DFLT);
119 	p_ramrod->tcp.max_fin_rt = QED_IWARP_MAX_FIN_RT_DEFAULT;
120 
121 	return;
122 }
123 
124 static int qed_iwarp_alloc_cid(struct qed_hwfn *p_hwfn, u32 *cid)
125 {
126 	int rc;
127 
128 	spin_lock_bh(&p_hwfn->p_rdma_info->lock);
129 	rc = qed_rdma_bmap_alloc_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, cid);
130 	spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
131 	if (rc) {
132 		DP_NOTICE(p_hwfn, "Failed in allocating iwarp cid\n");
133 		return rc;
134 	}
135 	*cid += qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);
136 
137 	rc = qed_cxt_dynamic_ilt_alloc(p_hwfn, QED_ELEM_CXT, *cid);
138 	if (rc)
139 		qed_iwarp_cid_cleaned(p_hwfn, *cid);
140 
141 	return rc;
142 }
143 
144 static void qed_iwarp_set_tcp_cid(struct qed_hwfn *p_hwfn, u32 cid)
145 {
146 	cid -= qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);
147 
148 	spin_lock_bh(&p_hwfn->p_rdma_info->lock);
149 	qed_bmap_set_id(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map, cid);
150 	spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
151 }
152 
153 /* This function allocates a cid for passive tcp (called from syn receive)
154  * the reason it's separate from the regular cid allocation is because it
155  * is assured that these cids already have ilt allocated. They are preallocated
156  * to ensure that we won't need to allocate memory during syn processing
157  */
158 static int qed_iwarp_alloc_tcp_cid(struct qed_hwfn *p_hwfn, u32 *cid)
159 {
160 	int rc;
161 
162 	spin_lock_bh(&p_hwfn->p_rdma_info->lock);
163 
164 	rc = qed_rdma_bmap_alloc_id(p_hwfn,
165 				    &p_hwfn->p_rdma_info->tcp_cid_map, cid);
166 
167 	spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
168 
169 	if (rc) {
170 		DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
171 			   "can't allocate iwarp tcp cid max-count=%d\n",
172 			   p_hwfn->p_rdma_info->tcp_cid_map.max_count);
173 
174 		*cid = QED_IWARP_INVALID_TCP_CID;
175 		return rc;
176 	}
177 
178 	*cid += qed_cxt_get_proto_cid_start(p_hwfn,
179 					    p_hwfn->p_rdma_info->proto);
180 	return 0;
181 }
182 
183 int qed_iwarp_create_qp(struct qed_hwfn *p_hwfn,
184 			struct qed_rdma_qp *qp,
185 			struct qed_rdma_create_qp_out_params *out_params)
186 {
187 	struct iwarp_create_qp_ramrod_data *p_ramrod;
188 	struct qed_sp_init_data init_data;
189 	struct qed_spq_entry *p_ent;
190 	u16 physical_queue;
191 	u32 cid;
192 	int rc;
193 
194 	qp->shared_queue = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
195 					      IWARP_SHARED_QUEUE_PAGE_SIZE,
196 					      &qp->shared_queue_phys_addr,
197 					      GFP_KERNEL);
198 	if (!qp->shared_queue)
199 		return -ENOMEM;
200 
201 	out_params->sq_pbl_virt = (u8 *)qp->shared_queue +
202 	    IWARP_SHARED_QUEUE_PAGE_SQ_PBL_OFFSET;
203 	out_params->sq_pbl_phys = qp->shared_queue_phys_addr +
204 	    IWARP_SHARED_QUEUE_PAGE_SQ_PBL_OFFSET;
205 	out_params->rq_pbl_virt = (u8 *)qp->shared_queue +
206 	    IWARP_SHARED_QUEUE_PAGE_RQ_PBL_OFFSET;
207 	out_params->rq_pbl_phys = qp->shared_queue_phys_addr +
208 	    IWARP_SHARED_QUEUE_PAGE_RQ_PBL_OFFSET;
209 
210 	rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
211 	if (rc)
212 		goto err1;
213 
214 	qp->icid = (u16)cid;
215 
216 	memset(&init_data, 0, sizeof(init_data));
217 	init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
218 	init_data.cid = qp->icid;
219 	init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
220 
221 	rc = qed_sp_init_request(p_hwfn, &p_ent,
222 				 IWARP_RAMROD_CMD_ID_CREATE_QP,
223 				 PROTOCOLID_IWARP, &init_data);
224 	if (rc)
225 		goto err2;
226 
227 	p_ramrod = &p_ent->ramrod.iwarp_create_qp;
228 
229 	SET_FIELD(p_ramrod->flags,
230 		  IWARP_CREATE_QP_RAMROD_DATA_FMR_AND_RESERVED_EN,
231 		  qp->fmr_and_reserved_lkey);
232 
233 	SET_FIELD(p_ramrod->flags,
234 		  IWARP_CREATE_QP_RAMROD_DATA_SIGNALED_COMP, qp->signal_all);
235 
236 	SET_FIELD(p_ramrod->flags,
237 		  IWARP_CREATE_QP_RAMROD_DATA_RDMA_RD_EN,
238 		  qp->incoming_rdma_read_en);
239 
240 	SET_FIELD(p_ramrod->flags,
241 		  IWARP_CREATE_QP_RAMROD_DATA_RDMA_WR_EN,
242 		  qp->incoming_rdma_write_en);
243 
244 	SET_FIELD(p_ramrod->flags,
245 		  IWARP_CREATE_QP_RAMROD_DATA_ATOMIC_EN,
246 		  qp->incoming_atomic_en);
247 
248 	SET_FIELD(p_ramrod->flags,
249 		  IWARP_CREATE_QP_RAMROD_DATA_SRQ_FLG, qp->use_srq);
250 
251 	p_ramrod->pd = cpu_to_le16(qp->pd);
252 	p_ramrod->sq_num_pages = cpu_to_le16(qp->sq_num_pages);
253 	p_ramrod->rq_num_pages = cpu_to_le16(qp->rq_num_pages);
254 
255 	p_ramrod->srq_id.srq_idx = cpu_to_le16(qp->srq_id);
256 	p_ramrod->srq_id.opaque_fid = cpu_to_le16(p_hwfn->hw_info.opaque_fid);
257 	p_ramrod->qp_handle_for_cqe.hi = qp->qp_handle.hi;
258 	p_ramrod->qp_handle_for_cqe.lo = qp->qp_handle.lo;
259 
260 	p_ramrod->cq_cid_for_sq =
261 	    cpu_to_le32((p_hwfn->hw_info.opaque_fid << 16) | qp->sq_cq_id);
262 	p_ramrod->cq_cid_for_rq =
263 	    cpu_to_le32((p_hwfn->hw_info.opaque_fid << 16) | qp->rq_cq_id);
264 
265 	p_ramrod->dpi = cpu_to_le16(qp->dpi);
266 
267 	physical_queue = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
268 	p_ramrod->physical_q0 = cpu_to_le16(physical_queue);
269 	physical_queue = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
270 	p_ramrod->physical_q1 = cpu_to_le16(physical_queue);
271 
272 	rc = qed_spq_post(p_hwfn, p_ent, NULL);
273 	if (rc)
274 		goto err2;
275 
276 	return rc;
277 
278 err2:
279 	qed_iwarp_cid_cleaned(p_hwfn, cid);
280 err1:
281 	dma_free_coherent(&p_hwfn->cdev->pdev->dev,
282 			  IWARP_SHARED_QUEUE_PAGE_SIZE,
283 			  qp->shared_queue, qp->shared_queue_phys_addr);
284 
285 	return rc;
286 }
287 
288 static int qed_iwarp_modify_fw(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
289 {
290 	struct iwarp_modify_qp_ramrod_data *p_ramrod;
291 	struct qed_sp_init_data init_data;
292 	struct qed_spq_entry *p_ent;
293 	u16 flags, trans_to_state;
294 	int rc;
295 
296 	/* Get SPQ entry */
297 	memset(&init_data, 0, sizeof(init_data));
298 	init_data.cid = qp->icid;
299 	init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
300 	init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
301 
302 	rc = qed_sp_init_request(p_hwfn, &p_ent,
303 				 IWARP_RAMROD_CMD_ID_MODIFY_QP,
304 				 p_hwfn->p_rdma_info->proto, &init_data);
305 	if (rc)
306 		return rc;
307 
308 	p_ramrod = &p_ent->ramrod.iwarp_modify_qp;
309 
310 	flags = le16_to_cpu(p_ramrod->flags);
311 	SET_FIELD(flags, IWARP_MODIFY_QP_RAMROD_DATA_STATE_TRANS_EN, 0x1);
312 	p_ramrod->flags = cpu_to_le16(flags);
313 
314 	if (qp->iwarp_state == QED_IWARP_QP_STATE_CLOSING)
315 		trans_to_state = IWARP_MODIFY_QP_STATE_CLOSING;
316 	else
317 		trans_to_state = IWARP_MODIFY_QP_STATE_ERROR;
318 
319 	p_ramrod->transition_to_state = cpu_to_le16(trans_to_state);
320 
321 	rc = qed_spq_post(p_hwfn, p_ent, NULL);
322 
323 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x)rc=%d\n", qp->icid, rc);
324 
325 	return rc;
326 }
327 
328 enum qed_iwarp_qp_state qed_roce2iwarp_state(enum qed_roce_qp_state state)
329 {
330 	switch (state) {
331 	case QED_ROCE_QP_STATE_RESET:
332 	case QED_ROCE_QP_STATE_INIT:
333 	case QED_ROCE_QP_STATE_RTR:
334 		return QED_IWARP_QP_STATE_IDLE;
335 	case QED_ROCE_QP_STATE_RTS:
336 		return QED_IWARP_QP_STATE_RTS;
337 	case QED_ROCE_QP_STATE_SQD:
338 		return QED_IWARP_QP_STATE_CLOSING;
339 	case QED_ROCE_QP_STATE_ERR:
340 		return QED_IWARP_QP_STATE_ERROR;
341 	case QED_ROCE_QP_STATE_SQE:
342 		return QED_IWARP_QP_STATE_TERMINATE;
343 	default:
344 		return QED_IWARP_QP_STATE_ERROR;
345 	}
346 }
347 
348 static enum qed_roce_qp_state
349 qed_iwarp2roce_state(enum qed_iwarp_qp_state state)
350 {
351 	switch (state) {
352 	case QED_IWARP_QP_STATE_IDLE:
353 		return QED_ROCE_QP_STATE_INIT;
354 	case QED_IWARP_QP_STATE_RTS:
355 		return QED_ROCE_QP_STATE_RTS;
356 	case QED_IWARP_QP_STATE_TERMINATE:
357 		return QED_ROCE_QP_STATE_SQE;
358 	case QED_IWARP_QP_STATE_CLOSING:
359 		return QED_ROCE_QP_STATE_SQD;
360 	case QED_IWARP_QP_STATE_ERROR:
361 		return QED_ROCE_QP_STATE_ERR;
362 	default:
363 		return QED_ROCE_QP_STATE_ERR;
364 	}
365 }
366 
367 static const char * const iwarp_state_names[] = {
368 	"IDLE",
369 	"RTS",
370 	"TERMINATE",
371 	"CLOSING",
372 	"ERROR",
373 };
374 
375 int
376 qed_iwarp_modify_qp(struct qed_hwfn *p_hwfn,
377 		    struct qed_rdma_qp *qp,
378 		    enum qed_iwarp_qp_state new_state, bool internal)
379 {
380 	enum qed_iwarp_qp_state prev_iw_state;
381 	bool modify_fw = false;
382 	int rc = 0;
383 
384 	/* modify QP can be called from upper-layer or as a result of async
385 	 * RST/FIN... therefore need to protect
386 	 */
387 	spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
388 	prev_iw_state = qp->iwarp_state;
389 
390 	if (prev_iw_state == new_state) {
391 		spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
392 		return 0;
393 	}
394 
395 	switch (prev_iw_state) {
396 	case QED_IWARP_QP_STATE_IDLE:
397 		switch (new_state) {
398 		case QED_IWARP_QP_STATE_RTS:
399 			qp->iwarp_state = QED_IWARP_QP_STATE_RTS;
400 			break;
401 		case QED_IWARP_QP_STATE_ERROR:
402 			qp->iwarp_state = QED_IWARP_QP_STATE_ERROR;
403 			if (!internal)
404 				modify_fw = true;
405 			break;
406 		default:
407 			break;
408 		}
409 		break;
410 	case QED_IWARP_QP_STATE_RTS:
411 		switch (new_state) {
412 		case QED_IWARP_QP_STATE_CLOSING:
413 			if (!internal)
414 				modify_fw = true;
415 
416 			qp->iwarp_state = QED_IWARP_QP_STATE_CLOSING;
417 			break;
418 		case QED_IWARP_QP_STATE_ERROR:
419 			if (!internal)
420 				modify_fw = true;
421 			qp->iwarp_state = QED_IWARP_QP_STATE_ERROR;
422 			break;
423 		default:
424 			break;
425 		}
426 		break;
427 	case QED_IWARP_QP_STATE_ERROR:
428 		switch (new_state) {
429 		case QED_IWARP_QP_STATE_IDLE:
430 
431 			qp->iwarp_state = new_state;
432 			break;
433 		case QED_IWARP_QP_STATE_CLOSING:
434 			/* could happen due to race... do nothing.... */
435 			break;
436 		default:
437 			rc = -EINVAL;
438 		}
439 		break;
440 	case QED_IWARP_QP_STATE_TERMINATE:
441 	case QED_IWARP_QP_STATE_CLOSING:
442 		qp->iwarp_state = new_state;
443 		break;
444 	default:
445 		break;
446 	}
447 
448 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) %s --> %s%s\n",
449 		   qp->icid,
450 		   iwarp_state_names[prev_iw_state],
451 		   iwarp_state_names[qp->iwarp_state],
452 		   internal ? "internal" : "");
453 
454 	spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
455 
456 	if (modify_fw)
457 		rc = qed_iwarp_modify_fw(p_hwfn, qp);
458 
459 	return rc;
460 }
461 
462 int qed_iwarp_fw_destroy(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
463 {
464 	struct qed_sp_init_data init_data;
465 	struct qed_spq_entry *p_ent;
466 	int rc;
467 
468 	/* Get SPQ entry */
469 	memset(&init_data, 0, sizeof(init_data));
470 	init_data.cid = qp->icid;
471 	init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
472 	init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
473 
474 	rc = qed_sp_init_request(p_hwfn, &p_ent,
475 				 IWARP_RAMROD_CMD_ID_DESTROY_QP,
476 				 p_hwfn->p_rdma_info->proto, &init_data);
477 	if (rc)
478 		return rc;
479 
480 	rc = qed_spq_post(p_hwfn, p_ent, NULL);
481 
482 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) rc = %d\n", qp->icid, rc);
483 
484 	return rc;
485 }
486 
487 static void qed_iwarp_destroy_ep(struct qed_hwfn *p_hwfn,
488 				 struct qed_iwarp_ep *ep,
489 				 bool remove_from_active_list)
490 {
491 	dma_free_coherent(&p_hwfn->cdev->pdev->dev,
492 			  sizeof(*ep->ep_buffer_virt),
493 			  ep->ep_buffer_virt, ep->ep_buffer_phys);
494 
495 	if (remove_from_active_list) {
496 		spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
497 		list_del(&ep->list_entry);
498 		spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
499 	}
500 
501 	if (ep->qp)
502 		ep->qp->ep = NULL;
503 
504 	kfree(ep);
505 }
506 
507 int qed_iwarp_destroy_qp(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
508 {
509 	struct qed_iwarp_ep *ep = qp->ep;
510 	int wait_count = 0;
511 	int rc = 0;
512 
513 	if (qp->iwarp_state != QED_IWARP_QP_STATE_ERROR) {
514 		rc = qed_iwarp_modify_qp(p_hwfn, qp,
515 					 QED_IWARP_QP_STATE_ERROR, false);
516 		if (rc)
517 			return rc;
518 	}
519 
520 	/* Make sure ep is closed before returning and freeing memory. */
521 	if (ep) {
522 		while (READ_ONCE(ep->state) != QED_IWARP_EP_CLOSED &&
523 		       wait_count++ < 200)
524 			msleep(100);
525 
526 		if (ep->state != QED_IWARP_EP_CLOSED)
527 			DP_NOTICE(p_hwfn, "ep state close timeout state=%x\n",
528 				  ep->state);
529 
530 		qed_iwarp_destroy_ep(p_hwfn, ep, false);
531 	}
532 
533 	rc = qed_iwarp_fw_destroy(p_hwfn, qp);
534 
535 	if (qp->shared_queue)
536 		dma_free_coherent(&p_hwfn->cdev->pdev->dev,
537 				  IWARP_SHARED_QUEUE_PAGE_SIZE,
538 				  qp->shared_queue, qp->shared_queue_phys_addr);
539 
540 	return rc;
541 }
542 
543 static int
544 qed_iwarp_create_ep(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep **ep_out)
545 {
546 	struct qed_iwarp_ep *ep;
547 	int rc;
548 
549 	ep = kzalloc(sizeof(*ep), GFP_KERNEL);
550 	if (!ep)
551 		return -ENOMEM;
552 
553 	ep->state = QED_IWARP_EP_INIT;
554 
555 	ep->ep_buffer_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
556 						sizeof(*ep->ep_buffer_virt),
557 						&ep->ep_buffer_phys,
558 						GFP_KERNEL);
559 	if (!ep->ep_buffer_virt) {
560 		rc = -ENOMEM;
561 		goto err;
562 	}
563 
564 	ep->sig = QED_EP_SIG;
565 
566 	*ep_out = ep;
567 
568 	return 0;
569 
570 err:
571 	kfree(ep);
572 	return rc;
573 }
574 
575 static void
576 qed_iwarp_print_tcp_ramrod(struct qed_hwfn *p_hwfn,
577 			   struct iwarp_tcp_offload_ramrod_data *p_tcp_ramrod)
578 {
579 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "local_mac=%x %x %x, remote_mac=%x %x %x\n",
580 		   p_tcp_ramrod->tcp.local_mac_addr_lo,
581 		   p_tcp_ramrod->tcp.local_mac_addr_mid,
582 		   p_tcp_ramrod->tcp.local_mac_addr_hi,
583 		   p_tcp_ramrod->tcp.remote_mac_addr_lo,
584 		   p_tcp_ramrod->tcp.remote_mac_addr_mid,
585 		   p_tcp_ramrod->tcp.remote_mac_addr_hi);
586 
587 	if (p_tcp_ramrod->tcp.ip_version == TCP_IPV4) {
588 		DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
589 			   "local_ip=%pI4h:%x, remote_ip=%pI4h:%x, vlan=%x\n",
590 			   p_tcp_ramrod->tcp.local_ip,
591 			   p_tcp_ramrod->tcp.local_port,
592 			   p_tcp_ramrod->tcp.remote_ip,
593 			   p_tcp_ramrod->tcp.remote_port,
594 			   p_tcp_ramrod->tcp.vlan_id);
595 	} else {
596 		DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
597 			   "local_ip=%pI6:%x, remote_ip=%pI6:%x, vlan=%x\n",
598 			   p_tcp_ramrod->tcp.local_ip,
599 			   p_tcp_ramrod->tcp.local_port,
600 			   p_tcp_ramrod->tcp.remote_ip,
601 			   p_tcp_ramrod->tcp.remote_port,
602 			   p_tcp_ramrod->tcp.vlan_id);
603 	}
604 
605 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
606 		   "flow_label=%x, ttl=%x, tos_or_tc=%x, mss=%x, rcv_wnd_scale=%x, connect_mode=%x, flags=%x\n",
607 		   p_tcp_ramrod->tcp.flow_label,
608 		   p_tcp_ramrod->tcp.ttl,
609 		   p_tcp_ramrod->tcp.tos_or_tc,
610 		   p_tcp_ramrod->tcp.mss,
611 		   p_tcp_ramrod->tcp.rcv_wnd_scale,
612 		   p_tcp_ramrod->tcp.connect_mode,
613 		   p_tcp_ramrod->tcp.flags);
614 
615 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "syn_ip_payload_length=%x, lo=%x, hi=%x\n",
616 		   p_tcp_ramrod->tcp.syn_ip_payload_length,
617 		   p_tcp_ramrod->tcp.syn_phy_addr_lo,
618 		   p_tcp_ramrod->tcp.syn_phy_addr_hi);
619 }
620 
621 static int
622 qed_iwarp_tcp_offload(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
623 {
624 	struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
625 	struct iwarp_tcp_offload_ramrod_data *p_tcp_ramrod;
626 	struct tcp_offload_params_opt2 *tcp;
627 	struct qed_sp_init_data init_data;
628 	struct qed_spq_entry *p_ent;
629 	dma_addr_t async_output_phys;
630 	dma_addr_t in_pdata_phys;
631 	u16 physical_q;
632 	u16 flags = 0;
633 	u8 tcp_flags;
634 	int rc;
635 	int i;
636 
637 	memset(&init_data, 0, sizeof(init_data));
638 	init_data.cid = ep->tcp_cid;
639 	init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
640 	if (ep->connect_mode == TCP_CONNECT_PASSIVE)
641 		init_data.comp_mode = QED_SPQ_MODE_CB;
642 	else
643 		init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
644 
645 	rc = qed_sp_init_request(p_hwfn, &p_ent,
646 				 IWARP_RAMROD_CMD_ID_TCP_OFFLOAD,
647 				 PROTOCOLID_IWARP, &init_data);
648 	if (rc)
649 		return rc;
650 
651 	p_tcp_ramrod = &p_ent->ramrod.iwarp_tcp_offload;
652 
653 	in_pdata_phys = ep->ep_buffer_phys +
654 			offsetof(struct qed_iwarp_ep_memory, in_pdata);
655 	DMA_REGPAIR_LE(p_tcp_ramrod->iwarp.incoming_ulp_buffer.addr,
656 		       in_pdata_phys);
657 
658 	p_tcp_ramrod->iwarp.incoming_ulp_buffer.len =
659 	    cpu_to_le16(sizeof(ep->ep_buffer_virt->in_pdata));
660 
661 	async_output_phys = ep->ep_buffer_phys +
662 			    offsetof(struct qed_iwarp_ep_memory, async_output);
663 	DMA_REGPAIR_LE(p_tcp_ramrod->iwarp.async_eqe_output_buf,
664 		       async_output_phys);
665 
666 	p_tcp_ramrod->iwarp.handle_for_async.hi = cpu_to_le32(PTR_HI(ep));
667 	p_tcp_ramrod->iwarp.handle_for_async.lo = cpu_to_le32(PTR_LO(ep));
668 
669 	physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
670 	p_tcp_ramrod->iwarp.physical_q0 = cpu_to_le16(physical_q);
671 	physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
672 	p_tcp_ramrod->iwarp.physical_q1 = cpu_to_le16(physical_q);
673 	p_tcp_ramrod->iwarp.mpa_mode = iwarp_info->mpa_rev;
674 
675 	tcp = &p_tcp_ramrod->tcp;
676 	qed_set_fw_mac_addr(&tcp->remote_mac_addr_hi,
677 			    &tcp->remote_mac_addr_mid,
678 			    &tcp->remote_mac_addr_lo, ep->remote_mac_addr);
679 	qed_set_fw_mac_addr(&tcp->local_mac_addr_hi, &tcp->local_mac_addr_mid,
680 			    &tcp->local_mac_addr_lo, ep->local_mac_addr);
681 
682 	tcp->vlan_id = cpu_to_le16(ep->cm_info.vlan);
683 
684 	tcp_flags = p_hwfn->p_rdma_info->iwarp.tcp_flags;
685 
686 	SET_FIELD(flags, TCP_OFFLOAD_PARAMS_OPT2_TS_EN,
687 		  !!(tcp_flags & QED_IWARP_TS_EN));
688 
689 	SET_FIELD(flags, TCP_OFFLOAD_PARAMS_OPT2_DA_EN,
690 		  !!(tcp_flags & QED_IWARP_DA_EN));
691 
692 	tcp->flags = cpu_to_le16(flags);
693 	tcp->ip_version = ep->cm_info.ip_version;
694 
695 	for (i = 0; i < 4; i++) {
696 		tcp->remote_ip[i] = cpu_to_le32(ep->cm_info.remote_ip[i]);
697 		tcp->local_ip[i] = cpu_to_le32(ep->cm_info.local_ip[i]);
698 	}
699 
700 	tcp->remote_port = cpu_to_le16(ep->cm_info.remote_port);
701 	tcp->local_port = cpu_to_le16(ep->cm_info.local_port);
702 	tcp->mss = cpu_to_le16(ep->mss);
703 	tcp->flow_label = 0;
704 	tcp->ttl = 0x40;
705 	tcp->tos_or_tc = 0;
706 
707 	tcp->max_rt_time = QED_IWARP_DEF_MAX_RT_TIME;
708 	tcp->cwnd = cpu_to_le32(QED_IWARP_DEF_CWND_FACTOR * ep->mss);
709 	tcp->ka_max_probe_cnt = QED_IWARP_DEF_KA_MAX_PROBE_CNT;
710 	tcp->ka_timeout = cpu_to_le32(QED_IWARP_DEF_KA_TIMEOUT);
711 	tcp->ka_interval = cpu_to_le32(QED_IWARP_DEF_KA_INTERVAL);
712 
713 	tcp->rcv_wnd_scale = (u8)p_hwfn->p_rdma_info->iwarp.rcv_wnd_scale;
714 	tcp->connect_mode = ep->connect_mode;
715 
716 	if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
717 		tcp->syn_ip_payload_length =
718 			cpu_to_le16(ep->syn_ip_payload_length);
719 		tcp->syn_phy_addr_hi = DMA_HI_LE(ep->syn_phy_addr);
720 		tcp->syn_phy_addr_lo = DMA_LO_LE(ep->syn_phy_addr);
721 	}
722 
723 	qed_iwarp_print_tcp_ramrod(p_hwfn, p_tcp_ramrod);
724 
725 	rc = qed_spq_post(p_hwfn, p_ent, NULL);
726 
727 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
728 		   "EP(0x%x) Offload completed rc=%d\n", ep->tcp_cid, rc);
729 
730 	return rc;
731 }
732 
733 static void
734 qed_iwarp_mpa_received(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
735 {
736 	struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
737 	struct qed_iwarp_cm_event_params params;
738 	struct mpa_v2_hdr *mpa_v2;
739 	union async_output *async_data;
740 	u16 mpa_ord, mpa_ird;
741 	u8 mpa_hdr_size = 0;
742 	u16 ulp_data_len;
743 	u8 mpa_rev;
744 
745 	async_data = &ep->ep_buffer_virt->async_output;
746 
747 	mpa_rev = async_data->mpa_request.mpa_handshake_mode;
748 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
749 		   "private_data_len=%x handshake_mode=%x private_data=(%x)\n",
750 		   async_data->mpa_request.ulp_data_len,
751 		   mpa_rev, *((u32 *)(ep->ep_buffer_virt->in_pdata)));
752 
753 	if (mpa_rev == MPA_NEGOTIATION_TYPE_ENHANCED) {
754 		/* Read ord/ird values from private data buffer */
755 		mpa_v2 = (struct mpa_v2_hdr *)ep->ep_buffer_virt->in_pdata;
756 		mpa_hdr_size = sizeof(*mpa_v2);
757 
758 		mpa_ord = ntohs(mpa_v2->ord);
759 		mpa_ird = ntohs(mpa_v2->ird);
760 
761 		/* Temprary store in cm_info incoming ord/ird requested, later
762 		 * replace with negotiated value during accept
763 		 */
764 		ep->cm_info.ord = (u8)min_t(u16,
765 					    (mpa_ord & MPA_V2_IRD_ORD_MASK),
766 					    QED_IWARP_ORD_DEFAULT);
767 
768 		ep->cm_info.ird = (u8)min_t(u16,
769 					    (mpa_ird & MPA_V2_IRD_ORD_MASK),
770 					    QED_IWARP_IRD_DEFAULT);
771 
772 		/* Peer2Peer negotiation */
773 		ep->rtr_type = MPA_RTR_TYPE_NONE;
774 		if (mpa_ird & MPA_V2_PEER2PEER_MODEL) {
775 			if (mpa_ord & MPA_V2_WRITE_RTR)
776 				ep->rtr_type |= MPA_RTR_TYPE_ZERO_WRITE;
777 
778 			if (mpa_ord & MPA_V2_READ_RTR)
779 				ep->rtr_type |= MPA_RTR_TYPE_ZERO_READ;
780 
781 			if (mpa_ird & MPA_V2_SEND_RTR)
782 				ep->rtr_type |= MPA_RTR_TYPE_ZERO_SEND;
783 
784 			ep->rtr_type &= iwarp_info->rtr_type;
785 
786 			/* if we're left with no match send our capabilities */
787 			if (ep->rtr_type == MPA_RTR_TYPE_NONE)
788 				ep->rtr_type = iwarp_info->rtr_type;
789 		}
790 
791 		ep->mpa_rev = MPA_NEGOTIATION_TYPE_ENHANCED;
792 	} else {
793 		ep->cm_info.ord = QED_IWARP_ORD_DEFAULT;
794 		ep->cm_info.ird = QED_IWARP_IRD_DEFAULT;
795 		ep->mpa_rev = MPA_NEGOTIATION_TYPE_BASIC;
796 	}
797 
798 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
799 		   "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x rtr:0x%x ulp_data_len = %x mpa_hdr_size = %x\n",
800 		   mpa_rev, ep->cm_info.ord, ep->cm_info.ird, ep->rtr_type,
801 		   async_data->mpa_request.ulp_data_len, mpa_hdr_size);
802 
803 	/* Strip mpa v2 hdr from private data before sending to upper layer */
804 	ep->cm_info.private_data = ep->ep_buffer_virt->in_pdata + mpa_hdr_size;
805 
806 	ulp_data_len = le16_to_cpu(async_data->mpa_request.ulp_data_len);
807 	ep->cm_info.private_data_len = ulp_data_len - mpa_hdr_size;
808 
809 	params.event = QED_IWARP_EVENT_MPA_REQUEST;
810 	params.cm_info = &ep->cm_info;
811 	params.ep_context = ep;
812 	params.status = 0;
813 
814 	ep->state = QED_IWARP_EP_MPA_REQ_RCVD;
815 	ep->event_cb(ep->cb_context, &params);
816 }
817 
818 static int
819 qed_iwarp_mpa_offload(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
820 {
821 	struct iwarp_mpa_offload_ramrod_data *p_mpa_ramrod;
822 	struct mpa_outgoing_params *common;
823 	struct qed_iwarp_info *iwarp_info;
824 	struct qed_sp_init_data init_data;
825 	dma_addr_t async_output_phys;
826 	struct qed_spq_entry *p_ent;
827 	dma_addr_t out_pdata_phys;
828 	dma_addr_t in_pdata_phys;
829 	struct qed_rdma_qp *qp;
830 	bool reject;
831 	u32 val;
832 	int rc;
833 
834 	if (!ep)
835 		return -EINVAL;
836 
837 	qp = ep->qp;
838 	reject = !qp;
839 
840 	memset(&init_data, 0, sizeof(init_data));
841 	init_data.cid = reject ? ep->tcp_cid : qp->icid;
842 	init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
843 
844 	if (ep->connect_mode == TCP_CONNECT_ACTIVE)
845 		init_data.comp_mode = QED_SPQ_MODE_CB;
846 	else
847 		init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
848 
849 	rc = qed_sp_init_request(p_hwfn, &p_ent,
850 				 IWARP_RAMROD_CMD_ID_MPA_OFFLOAD,
851 				 PROTOCOLID_IWARP, &init_data);
852 	if (rc)
853 		return rc;
854 
855 	p_mpa_ramrod = &p_ent->ramrod.iwarp_mpa_offload;
856 	common = &p_mpa_ramrod->common;
857 
858 	out_pdata_phys = ep->ep_buffer_phys +
859 			 offsetof(struct qed_iwarp_ep_memory, out_pdata);
860 	DMA_REGPAIR_LE(common->outgoing_ulp_buffer.addr, out_pdata_phys);
861 
862 	val = ep->cm_info.private_data_len;
863 	common->outgoing_ulp_buffer.len = cpu_to_le16(val);
864 	common->crc_needed = p_hwfn->p_rdma_info->iwarp.crc_needed;
865 
866 	common->out_rq.ord = cpu_to_le32(ep->cm_info.ord);
867 	common->out_rq.ird = cpu_to_le32(ep->cm_info.ird);
868 
869 	val = p_hwfn->hw_info.opaque_fid << 16 | ep->tcp_cid;
870 	p_mpa_ramrod->tcp_cid = cpu_to_le32(val);
871 
872 	in_pdata_phys = ep->ep_buffer_phys +
873 			offsetof(struct qed_iwarp_ep_memory, in_pdata);
874 	p_mpa_ramrod->tcp_connect_side = ep->connect_mode;
875 	DMA_REGPAIR_LE(p_mpa_ramrod->incoming_ulp_buffer.addr,
876 		       in_pdata_phys);
877 	p_mpa_ramrod->incoming_ulp_buffer.len =
878 	    cpu_to_le16(sizeof(ep->ep_buffer_virt->in_pdata));
879 	async_output_phys = ep->ep_buffer_phys +
880 			    offsetof(struct qed_iwarp_ep_memory, async_output);
881 	DMA_REGPAIR_LE(p_mpa_ramrod->async_eqe_output_buf,
882 		       async_output_phys);
883 	p_mpa_ramrod->handle_for_async.hi = cpu_to_le32(PTR_HI(ep));
884 	p_mpa_ramrod->handle_for_async.lo = cpu_to_le32(PTR_LO(ep));
885 
886 	if (!reject) {
887 		DMA_REGPAIR_LE(p_mpa_ramrod->shared_queue_addr,
888 			       qp->shared_queue_phys_addr);
889 		p_mpa_ramrod->stats_counter_id =
890 		    RESC_START(p_hwfn, QED_RDMA_STATS_QUEUE) + qp->stats_queue;
891 	} else {
892 		common->reject = 1;
893 	}
894 
895 	iwarp_info = &p_hwfn->p_rdma_info->iwarp;
896 	p_mpa_ramrod->rcv_wnd = cpu_to_le16(iwarp_info->rcv_wnd_size);
897 	p_mpa_ramrod->mode = ep->mpa_rev;
898 	SET_FIELD(p_mpa_ramrod->rtr_pref,
899 		  IWARP_MPA_OFFLOAD_RAMROD_DATA_RTR_SUPPORTED, ep->rtr_type);
900 
901 	ep->state = QED_IWARP_EP_MPA_OFFLOADED;
902 	rc = qed_spq_post(p_hwfn, p_ent, NULL);
903 	if (!reject)
904 		ep->cid = qp->icid;	/* Now they're migrated. */
905 
906 	DP_VERBOSE(p_hwfn,
907 		   QED_MSG_RDMA,
908 		   "QP(0x%x) EP(0x%x) MPA Offload rc = %d IRD=0x%x ORD=0x%x rtr_type=%d mpa_rev=%d reject=%d\n",
909 		   reject ? 0xffff : qp->icid,
910 		   ep->tcp_cid,
911 		   rc,
912 		   ep->cm_info.ird,
913 		   ep->cm_info.ord, ep->rtr_type, ep->mpa_rev, reject);
914 	return rc;
915 }
916 
917 static void
918 qed_iwarp_return_ep(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
919 {
920 	ep->state = QED_IWARP_EP_INIT;
921 	if (ep->qp)
922 		ep->qp->ep = NULL;
923 	ep->qp = NULL;
924 	memset(&ep->cm_info, 0, sizeof(ep->cm_info));
925 
926 	if (ep->tcp_cid == QED_IWARP_INVALID_TCP_CID) {
927 		/* We don't care about the return code, it's ok if tcp_cid
928 		 * remains invalid...in this case we'll defer allocation
929 		 */
930 		qed_iwarp_alloc_tcp_cid(p_hwfn, &ep->tcp_cid);
931 	}
932 	spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
933 
934 	list_move_tail(&ep->list_entry,
935 		       &p_hwfn->p_rdma_info->iwarp.ep_free_list);
936 
937 	spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
938 }
939 
940 static void
941 qed_iwarp_parse_private_data(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
942 {
943 	struct mpa_v2_hdr *mpa_v2_params;
944 	union async_output *async_data;
945 	u16 mpa_ird, mpa_ord;
946 	u8 mpa_data_size = 0;
947 	u16 ulp_data_len;
948 
949 	if (MPA_REV2(p_hwfn->p_rdma_info->iwarp.mpa_rev)) {
950 		mpa_v2_params =
951 			(struct mpa_v2_hdr *)(ep->ep_buffer_virt->in_pdata);
952 		mpa_data_size = sizeof(*mpa_v2_params);
953 		mpa_ird = ntohs(mpa_v2_params->ird);
954 		mpa_ord = ntohs(mpa_v2_params->ord);
955 
956 		ep->cm_info.ird = (u8)(mpa_ord & MPA_V2_IRD_ORD_MASK);
957 		ep->cm_info.ord = (u8)(mpa_ird & MPA_V2_IRD_ORD_MASK);
958 	}
959 
960 	async_data = &ep->ep_buffer_virt->async_output;
961 	ep->cm_info.private_data = ep->ep_buffer_virt->in_pdata + mpa_data_size;
962 
963 	ulp_data_len = le16_to_cpu(async_data->mpa_response.ulp_data_len);
964 	ep->cm_info.private_data_len = ulp_data_len - mpa_data_size;
965 }
966 
967 static void
968 qed_iwarp_mpa_reply_arrived(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
969 {
970 	struct qed_iwarp_cm_event_params params;
971 
972 	if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
973 		DP_NOTICE(p_hwfn,
974 			  "MPA reply event not expected on passive side!\n");
975 		return;
976 	}
977 
978 	params.event = QED_IWARP_EVENT_ACTIVE_MPA_REPLY;
979 
980 	qed_iwarp_parse_private_data(p_hwfn, ep);
981 
982 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
983 		   "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x\n",
984 		   ep->mpa_rev, ep->cm_info.ord, ep->cm_info.ird);
985 
986 	params.cm_info = &ep->cm_info;
987 	params.ep_context = ep;
988 	params.status = 0;
989 
990 	ep->mpa_reply_processed = true;
991 
992 	ep->event_cb(ep->cb_context, &params);
993 }
994 
995 #define QED_IWARP_CONNECT_MODE_STRING(ep) \
996 	((ep)->connect_mode == TCP_CONNECT_PASSIVE) ? "Passive" : "Active"
997 
998 /* Called as a result of the event:
999  * IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_COMPLETE
1000  */
1001 static void
1002 qed_iwarp_mpa_complete(struct qed_hwfn *p_hwfn,
1003 		       struct qed_iwarp_ep *ep, u8 fw_return_code)
1004 {
1005 	struct qed_iwarp_cm_event_params params;
1006 
1007 	if (ep->connect_mode == TCP_CONNECT_ACTIVE)
1008 		params.event = QED_IWARP_EVENT_ACTIVE_COMPLETE;
1009 	else
1010 		params.event = QED_IWARP_EVENT_PASSIVE_COMPLETE;
1011 
1012 	if (ep->connect_mode == TCP_CONNECT_ACTIVE && !ep->mpa_reply_processed)
1013 		qed_iwarp_parse_private_data(p_hwfn, ep);
1014 
1015 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1016 		   "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x\n",
1017 		   ep->mpa_rev, ep->cm_info.ord, ep->cm_info.ird);
1018 
1019 	params.cm_info = &ep->cm_info;
1020 
1021 	params.ep_context = ep;
1022 
1023 	switch (fw_return_code) {
1024 	case RDMA_RETURN_OK:
1025 		ep->qp->max_rd_atomic_req = ep->cm_info.ord;
1026 		ep->qp->max_rd_atomic_resp = ep->cm_info.ird;
1027 		qed_iwarp_modify_qp(p_hwfn, ep->qp, QED_IWARP_QP_STATE_RTS, 1);
1028 		ep->state = QED_IWARP_EP_ESTABLISHED;
1029 		params.status = 0;
1030 		break;
1031 	case IWARP_CONN_ERROR_MPA_TIMEOUT:
1032 		DP_NOTICE(p_hwfn, "%s(0x%x) MPA timeout\n",
1033 			  QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1034 		params.status = -EBUSY;
1035 		break;
1036 	case IWARP_CONN_ERROR_MPA_ERROR_REJECT:
1037 		DP_NOTICE(p_hwfn, "%s(0x%x) MPA Reject\n",
1038 			  QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1039 		params.status = -ECONNREFUSED;
1040 		break;
1041 	case IWARP_CONN_ERROR_MPA_RST:
1042 		DP_NOTICE(p_hwfn, "%s(0x%x) MPA reset(tcp cid: 0x%x)\n",
1043 			  QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid,
1044 			  ep->tcp_cid);
1045 		params.status = -ECONNRESET;
1046 		break;
1047 	case IWARP_CONN_ERROR_MPA_FIN:
1048 		DP_NOTICE(p_hwfn, "%s(0x%x) MPA received FIN\n",
1049 			  QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1050 		params.status = -ECONNREFUSED;
1051 		break;
1052 	case IWARP_CONN_ERROR_MPA_INSUF_IRD:
1053 		DP_NOTICE(p_hwfn, "%s(0x%x) MPA insufficient ird\n",
1054 			  QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1055 		params.status = -ECONNREFUSED;
1056 		break;
1057 	case IWARP_CONN_ERROR_MPA_RTR_MISMATCH:
1058 		DP_NOTICE(p_hwfn, "%s(0x%x) MPA RTR MISMATCH\n",
1059 			  QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1060 		params.status = -ECONNREFUSED;
1061 		break;
1062 	case IWARP_CONN_ERROR_MPA_INVALID_PACKET:
1063 		DP_NOTICE(p_hwfn, "%s(0x%x) MPA Invalid Packet\n",
1064 			  QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1065 		params.status = -ECONNREFUSED;
1066 		break;
1067 	case IWARP_CONN_ERROR_MPA_LOCAL_ERROR:
1068 		DP_NOTICE(p_hwfn, "%s(0x%x) MPA Local Error\n",
1069 			  QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1070 		params.status = -ECONNREFUSED;
1071 		break;
1072 	case IWARP_CONN_ERROR_MPA_TERMINATE:
1073 		DP_NOTICE(p_hwfn, "%s(0x%x) MPA TERMINATE\n",
1074 			  QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1075 		params.status = -ECONNREFUSED;
1076 		break;
1077 	default:
1078 		params.status = -ECONNRESET;
1079 		break;
1080 	}
1081 
1082 	if (fw_return_code != RDMA_RETURN_OK)
1083 		/* paired with READ_ONCE in destroy_qp */
1084 		smp_store_release(&ep->state, QED_IWARP_EP_CLOSED);
1085 
1086 	ep->event_cb(ep->cb_context, &params);
1087 
1088 	/* on passive side, if there is no associated QP (REJECT) we need to
1089 	 * return the ep to the pool, (in the regular case we add an element
1090 	 * in accept instead of this one.
1091 	 * In both cases we need to remove it from the ep_list.
1092 	 */
1093 	if (fw_return_code != RDMA_RETURN_OK) {
1094 		ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
1095 		if ((ep->connect_mode == TCP_CONNECT_PASSIVE) &&
1096 		    (!ep->qp)) {	/* Rejected */
1097 			qed_iwarp_return_ep(p_hwfn, ep);
1098 		} else {
1099 			spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1100 			list_del(&ep->list_entry);
1101 			spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1102 		}
1103 	}
1104 }
1105 
1106 static void
1107 qed_iwarp_mpa_v2_set_private(struct qed_hwfn *p_hwfn,
1108 			     struct qed_iwarp_ep *ep, u8 *mpa_data_size)
1109 {
1110 	struct mpa_v2_hdr *mpa_v2_params;
1111 	u16 mpa_ird, mpa_ord;
1112 
1113 	*mpa_data_size = 0;
1114 	if (MPA_REV2(ep->mpa_rev)) {
1115 		mpa_v2_params =
1116 		    (struct mpa_v2_hdr *)ep->ep_buffer_virt->out_pdata;
1117 		*mpa_data_size = sizeof(*mpa_v2_params);
1118 
1119 		mpa_ird = (u16)ep->cm_info.ird;
1120 		mpa_ord = (u16)ep->cm_info.ord;
1121 
1122 		if (ep->rtr_type != MPA_RTR_TYPE_NONE) {
1123 			mpa_ird |= MPA_V2_PEER2PEER_MODEL;
1124 
1125 			if (ep->rtr_type & MPA_RTR_TYPE_ZERO_SEND)
1126 				mpa_ird |= MPA_V2_SEND_RTR;
1127 
1128 			if (ep->rtr_type & MPA_RTR_TYPE_ZERO_WRITE)
1129 				mpa_ord |= MPA_V2_WRITE_RTR;
1130 
1131 			if (ep->rtr_type & MPA_RTR_TYPE_ZERO_READ)
1132 				mpa_ord |= MPA_V2_READ_RTR;
1133 		}
1134 
1135 		mpa_v2_params->ird = htons(mpa_ird);
1136 		mpa_v2_params->ord = htons(mpa_ord);
1137 
1138 		DP_VERBOSE(p_hwfn,
1139 			   QED_MSG_RDMA,
1140 			   "MPA_NEGOTIATE Header: [%x ord:%x ird] %x ord:%x ird:%x peer2peer:%x rtr_send:%x rtr_write:%x rtr_read:%x\n",
1141 			   mpa_v2_params->ird,
1142 			   mpa_v2_params->ord,
1143 			   *((u32 *)mpa_v2_params),
1144 			   mpa_ord & MPA_V2_IRD_ORD_MASK,
1145 			   mpa_ird & MPA_V2_IRD_ORD_MASK,
1146 			   !!(mpa_ird & MPA_V2_PEER2PEER_MODEL),
1147 			   !!(mpa_ird & MPA_V2_SEND_RTR),
1148 			   !!(mpa_ord & MPA_V2_WRITE_RTR),
1149 			   !!(mpa_ord & MPA_V2_READ_RTR));
1150 	}
1151 }
1152 
1153 int qed_iwarp_connect(void *rdma_cxt,
1154 		      struct qed_iwarp_connect_in *iparams,
1155 		      struct qed_iwarp_connect_out *oparams)
1156 {
1157 	struct qed_hwfn *p_hwfn = rdma_cxt;
1158 	struct qed_iwarp_info *iwarp_info;
1159 	struct qed_iwarp_ep *ep;
1160 	u8 mpa_data_size = 0;
1161 	u32 cid;
1162 	int rc;
1163 
1164 	if ((iparams->cm_info.ord > QED_IWARP_ORD_DEFAULT) ||
1165 	    (iparams->cm_info.ird > QED_IWARP_IRD_DEFAULT)) {
1166 		DP_NOTICE(p_hwfn,
1167 			  "QP(0x%x) ERROR: Invalid ord(0x%x)/ird(0x%x)\n",
1168 			  iparams->qp->icid, iparams->cm_info.ord,
1169 			  iparams->cm_info.ird);
1170 
1171 		return -EINVAL;
1172 	}
1173 
1174 	iwarp_info = &p_hwfn->p_rdma_info->iwarp;
1175 
1176 	/* Allocate ep object */
1177 	rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
1178 	if (rc)
1179 		return rc;
1180 
1181 	rc = qed_iwarp_create_ep(p_hwfn, &ep);
1182 	if (rc)
1183 		goto err;
1184 
1185 	ep->tcp_cid = cid;
1186 
1187 	spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1188 	list_add_tail(&ep->list_entry, &p_hwfn->p_rdma_info->iwarp.ep_list);
1189 	spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1190 
1191 	ep->qp = iparams->qp;
1192 	ep->qp->ep = ep;
1193 	ether_addr_copy(ep->remote_mac_addr, iparams->remote_mac_addr);
1194 	ether_addr_copy(ep->local_mac_addr, iparams->local_mac_addr);
1195 	memcpy(&ep->cm_info, &iparams->cm_info, sizeof(ep->cm_info));
1196 
1197 	ep->cm_info.ord = iparams->cm_info.ord;
1198 	ep->cm_info.ird = iparams->cm_info.ird;
1199 
1200 	ep->rtr_type = iwarp_info->rtr_type;
1201 	if (!iwarp_info->peer2peer)
1202 		ep->rtr_type = MPA_RTR_TYPE_NONE;
1203 
1204 	if ((ep->rtr_type & MPA_RTR_TYPE_ZERO_READ) && (ep->cm_info.ord == 0))
1205 		ep->cm_info.ord = 1;
1206 
1207 	ep->mpa_rev = iwarp_info->mpa_rev;
1208 
1209 	qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);
1210 
1211 	ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
1212 	ep->cm_info.private_data_len = iparams->cm_info.private_data_len +
1213 				       mpa_data_size;
1214 
1215 	memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
1216 	       iparams->cm_info.private_data,
1217 	       iparams->cm_info.private_data_len);
1218 
1219 	ep->mss = iparams->mss;
1220 	ep->mss = min_t(u16, QED_IWARP_MAX_FW_MSS, ep->mss);
1221 
1222 	ep->event_cb = iparams->event_cb;
1223 	ep->cb_context = iparams->cb_context;
1224 	ep->connect_mode = TCP_CONNECT_ACTIVE;
1225 
1226 	oparams->ep_context = ep;
1227 
1228 	rc = qed_iwarp_tcp_offload(p_hwfn, ep);
1229 
1230 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x) rc = %d\n",
1231 		   iparams->qp->icid, ep->tcp_cid, rc);
1232 
1233 	if (rc) {
1234 		qed_iwarp_destroy_ep(p_hwfn, ep, true);
1235 		goto err;
1236 	}
1237 
1238 	return rc;
1239 err:
1240 	qed_iwarp_cid_cleaned(p_hwfn, cid);
1241 
1242 	return rc;
1243 }
1244 
1245 static struct qed_iwarp_ep *qed_iwarp_get_free_ep(struct qed_hwfn *p_hwfn)
1246 {
1247 	struct qed_iwarp_ep *ep = NULL;
1248 	int rc;
1249 
1250 	spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1251 
1252 	if (list_empty(&p_hwfn->p_rdma_info->iwarp.ep_free_list)) {
1253 		DP_ERR(p_hwfn, "Ep list is empty\n");
1254 		goto out;
1255 	}
1256 
1257 	ep = list_first_entry(&p_hwfn->p_rdma_info->iwarp.ep_free_list,
1258 			      struct qed_iwarp_ep, list_entry);
1259 
1260 	/* in some cases we could have failed allocating a tcp cid when added
1261 	 * from accept / failure... retry now..this is not the common case.
1262 	 */
1263 	if (ep->tcp_cid == QED_IWARP_INVALID_TCP_CID) {
1264 		rc = qed_iwarp_alloc_tcp_cid(p_hwfn, &ep->tcp_cid);
1265 
1266 		/* if we fail we could look for another entry with a valid
1267 		 * tcp_cid, but since we don't expect to reach this anyway
1268 		 * it's not worth the handling
1269 		 */
1270 		if (rc) {
1271 			ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
1272 			ep = NULL;
1273 			goto out;
1274 		}
1275 	}
1276 
1277 	list_del(&ep->list_entry);
1278 
1279 out:
1280 	spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1281 	return ep;
1282 }
1283 
1284 #define QED_IWARP_MAX_CID_CLEAN_TIME  100
1285 #define QED_IWARP_MAX_NO_PROGRESS_CNT 5
1286 
1287 /* This function waits for all the bits of a bmap to be cleared, as long as
1288  * there is progress ( i.e. the number of bits left to be cleared decreases )
1289  * the function continues.
1290  */
1291 static int
1292 qed_iwarp_wait_cid_map_cleared(struct qed_hwfn *p_hwfn, struct qed_bmap *bmap)
1293 {
1294 	int prev_weight = 0;
1295 	int wait_count = 0;
1296 	int weight = 0;
1297 
1298 	weight = bitmap_weight(bmap->bitmap, bmap->max_count);
1299 	prev_weight = weight;
1300 
1301 	while (weight) {
1302 		/* If the HW device is during recovery, all resources are
1303 		 * immediately reset without receiving a per-cid indication
1304 		 * from HW. In this case we don't expect the cid_map to be
1305 		 * cleared.
1306 		 */
1307 		if (p_hwfn->cdev->recov_in_prog)
1308 			return 0;
1309 
1310 		msleep(QED_IWARP_MAX_CID_CLEAN_TIME);
1311 
1312 		weight = bitmap_weight(bmap->bitmap, bmap->max_count);
1313 
1314 		if (prev_weight == weight) {
1315 			wait_count++;
1316 		} else {
1317 			prev_weight = weight;
1318 			wait_count = 0;
1319 		}
1320 
1321 		if (wait_count > QED_IWARP_MAX_NO_PROGRESS_CNT) {
1322 			DP_NOTICE(p_hwfn,
1323 				  "%s bitmap wait timed out (%d cids pending)\n",
1324 				  bmap->name, weight);
1325 			return -EBUSY;
1326 		}
1327 	}
1328 	return 0;
1329 }
1330 
1331 static int qed_iwarp_wait_for_all_cids(struct qed_hwfn *p_hwfn)
1332 {
1333 	int rc;
1334 	int i;
1335 
1336 	rc = qed_iwarp_wait_cid_map_cleared(p_hwfn,
1337 					    &p_hwfn->p_rdma_info->tcp_cid_map);
1338 	if (rc)
1339 		return rc;
1340 
1341 	/* Now free the tcp cids from the main cid map */
1342 	for (i = 0; i < QED_IWARP_PREALLOC_CNT; i++)
1343 		qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, i);
1344 
1345 	/* Now wait for all cids to be completed */
1346 	return qed_iwarp_wait_cid_map_cleared(p_hwfn,
1347 					      &p_hwfn->p_rdma_info->cid_map);
1348 }
1349 
1350 static void qed_iwarp_free_prealloc_ep(struct qed_hwfn *p_hwfn)
1351 {
1352 	struct qed_iwarp_ep *ep;
1353 
1354 	while (!list_empty(&p_hwfn->p_rdma_info->iwarp.ep_free_list)) {
1355 		spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1356 
1357 		ep = list_first_entry(&p_hwfn->p_rdma_info->iwarp.ep_free_list,
1358 				      struct qed_iwarp_ep, list_entry);
1359 
1360 		if (!ep) {
1361 			spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1362 			break;
1363 		}
1364 		list_del(&ep->list_entry);
1365 
1366 		spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1367 
1368 		if (ep->tcp_cid != QED_IWARP_INVALID_TCP_CID)
1369 			qed_iwarp_cid_cleaned(p_hwfn, ep->tcp_cid);
1370 
1371 		qed_iwarp_destroy_ep(p_hwfn, ep, false);
1372 	}
1373 }
1374 
1375 static int qed_iwarp_prealloc_ep(struct qed_hwfn *p_hwfn, bool init)
1376 {
1377 	struct qed_iwarp_ep *ep;
1378 	int rc = 0;
1379 	int count;
1380 	u32 cid;
1381 	int i;
1382 
1383 	count = init ? QED_IWARP_PREALLOC_CNT : 1;
1384 	for (i = 0; i < count; i++) {
1385 		rc = qed_iwarp_create_ep(p_hwfn, &ep);
1386 		if (rc)
1387 			return rc;
1388 
1389 		/* During initialization we allocate from the main pool,
1390 		 * afterwards we allocate only from the tcp_cid.
1391 		 */
1392 		if (init) {
1393 			rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
1394 			if (rc)
1395 				goto err;
1396 			qed_iwarp_set_tcp_cid(p_hwfn, cid);
1397 		} else {
1398 			/* We don't care about the return code, it's ok if
1399 			 * tcp_cid remains invalid...in this case we'll
1400 			 * defer allocation
1401 			 */
1402 			qed_iwarp_alloc_tcp_cid(p_hwfn, &cid);
1403 		}
1404 
1405 		ep->tcp_cid = cid;
1406 
1407 		spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1408 		list_add_tail(&ep->list_entry,
1409 			      &p_hwfn->p_rdma_info->iwarp.ep_free_list);
1410 		spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1411 	}
1412 
1413 	return rc;
1414 
1415 err:
1416 	qed_iwarp_destroy_ep(p_hwfn, ep, false);
1417 
1418 	return rc;
1419 }
1420 
1421 int qed_iwarp_alloc(struct qed_hwfn *p_hwfn)
1422 {
1423 	int rc;
1424 
1425 	/* Allocate bitmap for tcp cid. These are used by passive side
1426 	 * to ensure it can allocate a tcp cid during dpc that was
1427 	 * pre-acquired and doesn't require dynamic allocation of ilt
1428 	 */
1429 	rc = qed_rdma_bmap_alloc(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map,
1430 				 QED_IWARP_PREALLOC_CNT, "TCP_CID");
1431 	if (rc) {
1432 		DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1433 			   "Failed to allocate tcp cid, rc = %d\n", rc);
1434 		return rc;
1435 	}
1436 
1437 	INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.ep_free_list);
1438 	spin_lock_init(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1439 
1440 	rc = qed_iwarp_prealloc_ep(p_hwfn, true);
1441 	if (rc)
1442 		return rc;
1443 
1444 	return qed_ooo_alloc(p_hwfn);
1445 }
1446 
1447 void qed_iwarp_resc_free(struct qed_hwfn *p_hwfn)
1448 {
1449 	struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
1450 
1451 	qed_ooo_free(p_hwfn);
1452 	qed_rdma_bmap_free(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map, 1);
1453 	kfree(iwarp_info->mpa_bufs);
1454 	kfree(iwarp_info->partial_fpdus);
1455 	kfree(iwarp_info->mpa_intermediate_buf);
1456 }
1457 
1458 int qed_iwarp_accept(void *rdma_cxt, struct qed_iwarp_accept_in *iparams)
1459 {
1460 	struct qed_hwfn *p_hwfn = rdma_cxt;
1461 	struct qed_iwarp_ep *ep;
1462 	u8 mpa_data_size = 0;
1463 	int rc;
1464 
1465 	ep = iparams->ep_context;
1466 	if (!ep) {
1467 		DP_ERR(p_hwfn, "Ep Context receive in accept is NULL\n");
1468 		return -EINVAL;
1469 	}
1470 
1471 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x)\n",
1472 		   iparams->qp->icid, ep->tcp_cid);
1473 
1474 	if ((iparams->ord > QED_IWARP_ORD_DEFAULT) ||
1475 	    (iparams->ird > QED_IWARP_IRD_DEFAULT)) {
1476 		DP_VERBOSE(p_hwfn,
1477 			   QED_MSG_RDMA,
1478 			   "QP(0x%x) EP(0x%x) ERROR: Invalid ord(0x%x)/ird(0x%x)\n",
1479 			   iparams->qp->icid,
1480 			   ep->tcp_cid, iparams->ord, iparams->ord);
1481 		return -EINVAL;
1482 	}
1483 
1484 	qed_iwarp_prealloc_ep(p_hwfn, false);
1485 
1486 	ep->cb_context = iparams->cb_context;
1487 	ep->qp = iparams->qp;
1488 	ep->qp->ep = ep;
1489 
1490 	if (ep->mpa_rev == MPA_NEGOTIATION_TYPE_ENHANCED) {
1491 		/* Negotiate ord/ird: if upperlayer requested ord larger than
1492 		 * ird advertised by remote, we need to decrease our ord
1493 		 */
1494 		if (iparams->ord > ep->cm_info.ird)
1495 			iparams->ord = ep->cm_info.ird;
1496 
1497 		if ((ep->rtr_type & MPA_RTR_TYPE_ZERO_READ) &&
1498 		    (iparams->ird == 0))
1499 			iparams->ird = 1;
1500 	}
1501 
1502 	/* Update cm_info ord/ird to be negotiated values */
1503 	ep->cm_info.ord = iparams->ord;
1504 	ep->cm_info.ird = iparams->ird;
1505 
1506 	qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);
1507 
1508 	ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
1509 	ep->cm_info.private_data_len = iparams->private_data_len +
1510 				       mpa_data_size;
1511 
1512 	memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
1513 	       iparams->private_data, iparams->private_data_len);
1514 
1515 	rc = qed_iwarp_mpa_offload(p_hwfn, ep);
1516 	if (rc)
1517 		qed_iwarp_modify_qp(p_hwfn,
1518 				    iparams->qp, QED_IWARP_QP_STATE_ERROR, 1);
1519 
1520 	return rc;
1521 }
1522 
1523 int qed_iwarp_reject(void *rdma_cxt, struct qed_iwarp_reject_in *iparams)
1524 {
1525 	struct qed_hwfn *p_hwfn = rdma_cxt;
1526 	struct qed_iwarp_ep *ep;
1527 	u8 mpa_data_size = 0;
1528 
1529 	ep = iparams->ep_context;
1530 	if (!ep) {
1531 		DP_ERR(p_hwfn, "Ep Context receive in reject is NULL\n");
1532 		return -EINVAL;
1533 	}
1534 
1535 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "EP(0x%x)\n", ep->tcp_cid);
1536 
1537 	ep->cb_context = iparams->cb_context;
1538 	ep->qp = NULL;
1539 
1540 	qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);
1541 
1542 	ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
1543 	ep->cm_info.private_data_len = iparams->private_data_len +
1544 				       mpa_data_size;
1545 
1546 	memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
1547 	       iparams->private_data, iparams->private_data_len);
1548 
1549 	return qed_iwarp_mpa_offload(p_hwfn, ep);
1550 }
1551 
1552 static void
1553 qed_iwarp_print_cm_info(struct qed_hwfn *p_hwfn,
1554 			struct qed_iwarp_cm_info *cm_info)
1555 {
1556 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "ip_version = %d\n",
1557 		   cm_info->ip_version);
1558 
1559 	if (cm_info->ip_version == QED_TCP_IPV4)
1560 		DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1561 			   "remote_ip %pI4h:%x, local_ip %pI4h:%x vlan=%x\n",
1562 			   cm_info->remote_ip, cm_info->remote_port,
1563 			   cm_info->local_ip, cm_info->local_port,
1564 			   cm_info->vlan);
1565 	else
1566 		DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1567 			   "remote_ip %pI6:%x, local_ip %pI6:%x vlan=%x\n",
1568 			   cm_info->remote_ip, cm_info->remote_port,
1569 			   cm_info->local_ip, cm_info->local_port,
1570 			   cm_info->vlan);
1571 
1572 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1573 		   "private_data_len = %x ord = %d, ird = %d\n",
1574 		   cm_info->private_data_len, cm_info->ord, cm_info->ird);
1575 }
1576 
1577 static int
1578 qed_iwarp_ll2_post_rx(struct qed_hwfn *p_hwfn,
1579 		      struct qed_iwarp_ll2_buff *buf, u8 handle)
1580 {
1581 	int rc;
1582 
1583 	rc = qed_ll2_post_rx_buffer(p_hwfn, handle, buf->data_phys_addr,
1584 				    (u16)buf->buff_size, buf, 1);
1585 	if (rc) {
1586 		DP_NOTICE(p_hwfn,
1587 			  "Failed to repost rx buffer to ll2 rc = %d, handle=%d\n",
1588 			  rc, handle);
1589 		dma_free_coherent(&p_hwfn->cdev->pdev->dev, buf->buff_size,
1590 				  buf->data, buf->data_phys_addr);
1591 		kfree(buf);
1592 	}
1593 
1594 	return rc;
1595 }
1596 
1597 static bool
1598 qed_iwarp_ep_exists(struct qed_hwfn *p_hwfn, struct qed_iwarp_cm_info *cm_info)
1599 {
1600 	struct qed_iwarp_ep *ep = NULL;
1601 	bool found = false;
1602 
1603 	list_for_each_entry(ep,
1604 			    &p_hwfn->p_rdma_info->iwarp.ep_list,
1605 			    list_entry) {
1606 		if ((ep->cm_info.local_port == cm_info->local_port) &&
1607 		    (ep->cm_info.remote_port == cm_info->remote_port) &&
1608 		    (ep->cm_info.vlan == cm_info->vlan) &&
1609 		    !memcmp(&ep->cm_info.local_ip, cm_info->local_ip,
1610 			    sizeof(cm_info->local_ip)) &&
1611 		    !memcmp(&ep->cm_info.remote_ip, cm_info->remote_ip,
1612 			    sizeof(cm_info->remote_ip))) {
1613 			found = true;
1614 			break;
1615 		}
1616 	}
1617 
1618 	if (found) {
1619 		DP_NOTICE(p_hwfn,
1620 			  "SYN received on active connection - dropping\n");
1621 		qed_iwarp_print_cm_info(p_hwfn, cm_info);
1622 
1623 		return true;
1624 	}
1625 
1626 	return false;
1627 }
1628 
1629 static struct qed_iwarp_listener *
1630 qed_iwarp_get_listener(struct qed_hwfn *p_hwfn,
1631 		       struct qed_iwarp_cm_info *cm_info)
1632 {
1633 	struct qed_iwarp_listener *listener = NULL;
1634 	static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1635 	bool found = false;
1636 
1637 	list_for_each_entry(listener,
1638 			    &p_hwfn->p_rdma_info->iwarp.listen_list,
1639 			    list_entry) {
1640 		if (listener->port == cm_info->local_port) {
1641 			if (!memcmp(listener->ip_addr,
1642 				    ip_zero, sizeof(ip_zero))) {
1643 				found = true;
1644 				break;
1645 			}
1646 
1647 			if (!memcmp(listener->ip_addr,
1648 				    cm_info->local_ip,
1649 				    sizeof(cm_info->local_ip)) &&
1650 			    (listener->vlan == cm_info->vlan)) {
1651 				found = true;
1652 				break;
1653 			}
1654 		}
1655 	}
1656 
1657 	if (found) {
1658 		DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "listener found = %p\n",
1659 			   listener);
1660 		return listener;
1661 	}
1662 
1663 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "listener not found\n");
1664 	return NULL;
1665 }
1666 
1667 static int
1668 qed_iwarp_parse_rx_pkt(struct qed_hwfn *p_hwfn,
1669 		       struct qed_iwarp_cm_info *cm_info,
1670 		       void *buf,
1671 		       u8 *remote_mac_addr,
1672 		       u8 *local_mac_addr,
1673 		       int *payload_len, int *tcp_start_offset)
1674 {
1675 	struct vlan_ethhdr *vethh;
1676 	bool vlan_valid = false;
1677 	struct ipv6hdr *ip6h;
1678 	struct ethhdr *ethh;
1679 	struct tcphdr *tcph;
1680 	struct iphdr *iph;
1681 	int eth_hlen;
1682 	int ip_hlen;
1683 	int eth_type;
1684 	int i;
1685 
1686 	ethh = buf;
1687 	eth_type = ntohs(ethh->h_proto);
1688 	if (eth_type == ETH_P_8021Q) {
1689 		vlan_valid = true;
1690 		vethh = (struct vlan_ethhdr *)ethh;
1691 		cm_info->vlan = ntohs(vethh->h_vlan_TCI) & VLAN_VID_MASK;
1692 		eth_type = ntohs(vethh->h_vlan_encapsulated_proto);
1693 	}
1694 
1695 	eth_hlen = ETH_HLEN + (vlan_valid ? sizeof(u32) : 0);
1696 
1697 	if (!ether_addr_equal(ethh->h_dest,
1698 			      p_hwfn->p_rdma_info->iwarp.mac_addr)) {
1699 		DP_VERBOSE(p_hwfn,
1700 			   QED_MSG_RDMA,
1701 			   "Got unexpected mac %pM instead of %pM\n",
1702 			   ethh->h_dest, p_hwfn->p_rdma_info->iwarp.mac_addr);
1703 		return -EINVAL;
1704 	}
1705 
1706 	ether_addr_copy(remote_mac_addr, ethh->h_source);
1707 	ether_addr_copy(local_mac_addr, ethh->h_dest);
1708 
1709 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "eth_type =%d source mac: %pM\n",
1710 		   eth_type, ethh->h_source);
1711 
1712 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "eth_hlen=%d destination mac: %pM\n",
1713 		   eth_hlen, ethh->h_dest);
1714 
1715 	iph = (struct iphdr *)((u8 *)(ethh) + eth_hlen);
1716 
1717 	if (eth_type == ETH_P_IP) {
1718 		if (iph->protocol != IPPROTO_TCP) {
1719 			DP_NOTICE(p_hwfn,
1720 				  "Unexpected ip protocol on ll2 %x\n",
1721 				  iph->protocol);
1722 			return -EINVAL;
1723 		}
1724 
1725 		cm_info->local_ip[0] = ntohl(iph->daddr);
1726 		cm_info->remote_ip[0] = ntohl(iph->saddr);
1727 		cm_info->ip_version = QED_TCP_IPV4;
1728 
1729 		ip_hlen = (iph->ihl) * sizeof(u32);
1730 		*payload_len = ntohs(iph->tot_len) - ip_hlen;
1731 	} else if (eth_type == ETH_P_IPV6) {
1732 		ip6h = (struct ipv6hdr *)iph;
1733 
1734 		if (ip6h->nexthdr != IPPROTO_TCP) {
1735 			DP_NOTICE(p_hwfn,
1736 				  "Unexpected ip protocol on ll2 %x\n",
1737 				  iph->protocol);
1738 			return -EINVAL;
1739 		}
1740 
1741 		for (i = 0; i < 4; i++) {
1742 			cm_info->local_ip[i] =
1743 			    ntohl(ip6h->daddr.in6_u.u6_addr32[i]);
1744 			cm_info->remote_ip[i] =
1745 			    ntohl(ip6h->saddr.in6_u.u6_addr32[i]);
1746 		}
1747 		cm_info->ip_version = QED_TCP_IPV6;
1748 
1749 		ip_hlen = sizeof(*ip6h);
1750 		*payload_len = ntohs(ip6h->payload_len);
1751 	} else {
1752 		DP_NOTICE(p_hwfn, "Unexpected ethertype on ll2 %x\n", eth_type);
1753 		return -EINVAL;
1754 	}
1755 
1756 	tcph = (struct tcphdr *)((u8 *)iph + ip_hlen);
1757 
1758 	if (!tcph->syn) {
1759 		DP_NOTICE(p_hwfn,
1760 			  "Only SYN type packet expected on this ll2 conn, iph->ihl=%d source=%d dest=%d\n",
1761 			  iph->ihl, tcph->source, tcph->dest);
1762 		return -EINVAL;
1763 	}
1764 
1765 	cm_info->local_port = ntohs(tcph->dest);
1766 	cm_info->remote_port = ntohs(tcph->source);
1767 
1768 	qed_iwarp_print_cm_info(p_hwfn, cm_info);
1769 
1770 	*tcp_start_offset = eth_hlen + ip_hlen;
1771 
1772 	return 0;
1773 }
1774 
1775 static struct qed_iwarp_fpdu *qed_iwarp_get_curr_fpdu(struct qed_hwfn *p_hwfn,
1776 						      u16 cid)
1777 {
1778 	struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
1779 	struct qed_iwarp_fpdu *partial_fpdu;
1780 	u32 idx;
1781 
1782 	idx = cid - qed_cxt_get_proto_cid_start(p_hwfn, PROTOCOLID_IWARP);
1783 	if (idx >= iwarp_info->max_num_partial_fpdus) {
1784 		DP_ERR(p_hwfn, "Invalid cid %x max_num_partial_fpdus=%x\n", cid,
1785 		       iwarp_info->max_num_partial_fpdus);
1786 		return NULL;
1787 	}
1788 
1789 	partial_fpdu = &iwarp_info->partial_fpdus[idx];
1790 
1791 	return partial_fpdu;
1792 }
1793 
1794 enum qed_iwarp_mpa_pkt_type {
1795 	QED_IWARP_MPA_PKT_PACKED,
1796 	QED_IWARP_MPA_PKT_PARTIAL,
1797 	QED_IWARP_MPA_PKT_UNALIGNED
1798 };
1799 
1800 #define QED_IWARP_INVALID_FPDU_LENGTH 0xffff
1801 #define QED_IWARP_MPA_FPDU_LENGTH_SIZE (2)
1802 #define QED_IWARP_MPA_CRC32_DIGEST_SIZE (4)
1803 
1804 /* Pad to multiple of 4 */
1805 #define QED_IWARP_PDU_DATA_LEN_WITH_PAD(data_len) ALIGN(data_len, 4)
1806 #define QED_IWARP_FPDU_LEN_WITH_PAD(_mpa_len)				   \
1807 	(QED_IWARP_PDU_DATA_LEN_WITH_PAD((_mpa_len) +			   \
1808 					 QED_IWARP_MPA_FPDU_LENGTH_SIZE) + \
1809 					 QED_IWARP_MPA_CRC32_DIGEST_SIZE)
1810 
1811 /* fpdu can be fragmented over maximum 3 bds: header, partial mpa, unaligned */
1812 #define QED_IWARP_MAX_BDS_PER_FPDU 3
1813 
1814 static const char * const pkt_type_str[] = {
1815 	"QED_IWARP_MPA_PKT_PACKED",
1816 	"QED_IWARP_MPA_PKT_PARTIAL",
1817 	"QED_IWARP_MPA_PKT_UNALIGNED"
1818 };
1819 
1820 static int
1821 qed_iwarp_recycle_pkt(struct qed_hwfn *p_hwfn,
1822 		      struct qed_iwarp_fpdu *fpdu,
1823 		      struct qed_iwarp_ll2_buff *buf);
1824 
1825 static enum qed_iwarp_mpa_pkt_type
1826 qed_iwarp_mpa_classify(struct qed_hwfn *p_hwfn,
1827 		       struct qed_iwarp_fpdu *fpdu,
1828 		       u16 tcp_payload_len, u8 *mpa_data)
1829 {
1830 	enum qed_iwarp_mpa_pkt_type pkt_type;
1831 	u16 mpa_len;
1832 
1833 	if (fpdu->incomplete_bytes) {
1834 		pkt_type = QED_IWARP_MPA_PKT_UNALIGNED;
1835 		goto out;
1836 	}
1837 
1838 	/* special case of one byte remaining...
1839 	 * lower byte will be read next packet
1840 	 */
1841 	if (tcp_payload_len == 1) {
1842 		fpdu->fpdu_length = *mpa_data << BITS_PER_BYTE;
1843 		pkt_type = QED_IWARP_MPA_PKT_PARTIAL;
1844 		goto out;
1845 	}
1846 
1847 	mpa_len = ntohs(*(__force __be16 *)mpa_data);
1848 	fpdu->fpdu_length = QED_IWARP_FPDU_LEN_WITH_PAD(mpa_len);
1849 
1850 	if (fpdu->fpdu_length <= tcp_payload_len)
1851 		pkt_type = QED_IWARP_MPA_PKT_PACKED;
1852 	else
1853 		pkt_type = QED_IWARP_MPA_PKT_PARTIAL;
1854 
1855 out:
1856 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1857 		   "MPA_ALIGN: %s: fpdu_length=0x%x tcp_payload_len:0x%x\n",
1858 		   pkt_type_str[pkt_type], fpdu->fpdu_length, tcp_payload_len);
1859 
1860 	return pkt_type;
1861 }
1862 
1863 static void
1864 qed_iwarp_init_fpdu(struct qed_iwarp_ll2_buff *buf,
1865 		    struct qed_iwarp_fpdu *fpdu,
1866 		    struct unaligned_opaque_data *pkt_data,
1867 		    u16 tcp_payload_size, u8 placement_offset)
1868 {
1869 	u16 first_mpa_offset = le16_to_cpu(pkt_data->first_mpa_offset);
1870 
1871 	fpdu->mpa_buf = buf;
1872 	fpdu->pkt_hdr = buf->data_phys_addr + placement_offset;
1873 	fpdu->pkt_hdr_size = pkt_data->tcp_payload_offset;
1874 	fpdu->mpa_frag = buf->data_phys_addr + first_mpa_offset;
1875 	fpdu->mpa_frag_virt = (u8 *)(buf->data) + first_mpa_offset;
1876 
1877 	if (tcp_payload_size == 1)
1878 		fpdu->incomplete_bytes = QED_IWARP_INVALID_FPDU_LENGTH;
1879 	else if (tcp_payload_size < fpdu->fpdu_length)
1880 		fpdu->incomplete_bytes = fpdu->fpdu_length - tcp_payload_size;
1881 	else
1882 		fpdu->incomplete_bytes = 0;	/* complete fpdu */
1883 
1884 	fpdu->mpa_frag_len = fpdu->fpdu_length - fpdu->incomplete_bytes;
1885 }
1886 
1887 static int
1888 qed_iwarp_cp_pkt(struct qed_hwfn *p_hwfn,
1889 		 struct qed_iwarp_fpdu *fpdu,
1890 		 struct unaligned_opaque_data *pkt_data,
1891 		 struct qed_iwarp_ll2_buff *buf, u16 tcp_payload_size)
1892 {
1893 	u16 first_mpa_offset = le16_to_cpu(pkt_data->first_mpa_offset);
1894 	u8 *tmp_buf = p_hwfn->p_rdma_info->iwarp.mpa_intermediate_buf;
1895 	int rc;
1896 
1897 	/* need to copy the data from the partial packet stored in fpdu
1898 	 * to the new buf, for this we also need to move the data currently
1899 	 * placed on the buf. The assumption is that the buffer is big enough
1900 	 * since fpdu_length <= mss, we use an intermediate buffer since
1901 	 * we may need to copy the new data to an overlapping location
1902 	 */
1903 	if ((fpdu->mpa_frag_len + tcp_payload_size) > (u16)buf->buff_size) {
1904 		DP_ERR(p_hwfn,
1905 		       "MPA ALIGN: Unexpected: buffer is not large enough for split fpdu buff_size = %d mpa_frag_len = %d, tcp_payload_size = %d, incomplete_bytes = %d\n",
1906 		       buf->buff_size, fpdu->mpa_frag_len,
1907 		       tcp_payload_size, fpdu->incomplete_bytes);
1908 		return -EINVAL;
1909 	}
1910 
1911 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1912 		   "MPA ALIGN Copying fpdu: [%p, %d] [%p, %d]\n",
1913 		   fpdu->mpa_frag_virt, fpdu->mpa_frag_len,
1914 		   (u8 *)(buf->data) + first_mpa_offset, tcp_payload_size);
1915 
1916 	memcpy(tmp_buf, fpdu->mpa_frag_virt, fpdu->mpa_frag_len);
1917 	memcpy(tmp_buf + fpdu->mpa_frag_len,
1918 	       (u8 *)(buf->data) + first_mpa_offset, tcp_payload_size);
1919 
1920 	rc = qed_iwarp_recycle_pkt(p_hwfn, fpdu, fpdu->mpa_buf);
1921 	if (rc)
1922 		return rc;
1923 
1924 	/* If we managed to post the buffer copy the data to the new buffer
1925 	 * o/w this will occur in the next round...
1926 	 */
1927 	memcpy((u8 *)(buf->data), tmp_buf,
1928 	       fpdu->mpa_frag_len + tcp_payload_size);
1929 
1930 	fpdu->mpa_buf = buf;
1931 	/* fpdu->pkt_hdr remains as is */
1932 	/* fpdu->mpa_frag is overridden with new buf */
1933 	fpdu->mpa_frag = buf->data_phys_addr;
1934 	fpdu->mpa_frag_virt = buf->data;
1935 	fpdu->mpa_frag_len += tcp_payload_size;
1936 
1937 	fpdu->incomplete_bytes -= tcp_payload_size;
1938 
1939 	DP_VERBOSE(p_hwfn,
1940 		   QED_MSG_RDMA,
1941 		   "MPA ALIGN: split fpdu buff_size = %d mpa_frag_len = %d, tcp_payload_size = %d, incomplete_bytes = %d\n",
1942 		   buf->buff_size, fpdu->mpa_frag_len, tcp_payload_size,
1943 		   fpdu->incomplete_bytes);
1944 
1945 	return 0;
1946 }
1947 
1948 static void
1949 qed_iwarp_update_fpdu_length(struct qed_hwfn *p_hwfn,
1950 			     struct qed_iwarp_fpdu *fpdu, u8 *mpa_data)
1951 {
1952 	u16 mpa_len;
1953 
1954 	/* Update incomplete packets if needed */
1955 	if (fpdu->incomplete_bytes == QED_IWARP_INVALID_FPDU_LENGTH) {
1956 		/* Missing lower byte is now available */
1957 		mpa_len = fpdu->fpdu_length | *mpa_data;
1958 		fpdu->fpdu_length = QED_IWARP_FPDU_LEN_WITH_PAD(mpa_len);
1959 		/* one byte of hdr */
1960 		fpdu->mpa_frag_len = 1;
1961 		fpdu->incomplete_bytes = fpdu->fpdu_length - 1;
1962 		DP_VERBOSE(p_hwfn,
1963 			   QED_MSG_RDMA,
1964 			   "MPA_ALIGN: Partial header mpa_len=%x fpdu_length=%x incomplete_bytes=%x\n",
1965 			   mpa_len, fpdu->fpdu_length, fpdu->incomplete_bytes);
1966 	}
1967 }
1968 
1969 #define QED_IWARP_IS_RIGHT_EDGE(_curr_pkt) \
1970 	(GET_FIELD((_curr_pkt)->flags,	   \
1971 		   UNALIGNED_OPAQUE_DATA_PKT_REACHED_WIN_RIGHT_EDGE))
1972 
1973 /* This function is used to recycle a buffer using the ll2 drop option. It
1974  * uses the mechanism to ensure that all buffers posted to tx before this one
1975  * were completed. The buffer sent here will be sent as a cookie in the tx
1976  * completion function and can then be reposted to rx chain when done. The flow
1977  * that requires this is the flow where a FPDU splits over more than 3 tcp
1978  * segments. In this case the driver needs to re-post a rx buffer instead of
1979  * the one received, but driver can't simply repost a buffer it copied from
1980  * as there is a case where the buffer was originally a packed FPDU, and is
1981  * partially posted to FW. Driver needs to ensure FW is done with it.
1982  */
1983 static int
1984 qed_iwarp_recycle_pkt(struct qed_hwfn *p_hwfn,
1985 		      struct qed_iwarp_fpdu *fpdu,
1986 		      struct qed_iwarp_ll2_buff *buf)
1987 {
1988 	struct qed_ll2_tx_pkt_info tx_pkt;
1989 	u8 ll2_handle;
1990 	int rc;
1991 
1992 	memset(&tx_pkt, 0, sizeof(tx_pkt));
1993 	tx_pkt.num_of_bds = 1;
1994 	tx_pkt.tx_dest = QED_LL2_TX_DEST_DROP;
1995 	tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2;
1996 	tx_pkt.first_frag = fpdu->pkt_hdr;
1997 	tx_pkt.first_frag_len = fpdu->pkt_hdr_size;
1998 	buf->piggy_buf = NULL;
1999 	tx_pkt.cookie = buf;
2000 
2001 	ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle;
2002 
2003 	rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true);
2004 	if (rc)
2005 		DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2006 			   "Can't drop packet rc=%d\n", rc);
2007 
2008 	DP_VERBOSE(p_hwfn,
2009 		   QED_MSG_RDMA,
2010 		   "MPA_ALIGN: send drop tx packet [%lx, 0x%x], buf=%p, rc=%d\n",
2011 		   (unsigned long int)tx_pkt.first_frag,
2012 		   tx_pkt.first_frag_len, buf, rc);
2013 
2014 	return rc;
2015 }
2016 
2017 static int
2018 qed_iwarp_win_right_edge(struct qed_hwfn *p_hwfn, struct qed_iwarp_fpdu *fpdu)
2019 {
2020 	struct qed_ll2_tx_pkt_info tx_pkt;
2021 	u8 ll2_handle;
2022 	int rc;
2023 
2024 	memset(&tx_pkt, 0, sizeof(tx_pkt));
2025 	tx_pkt.num_of_bds = 1;
2026 	tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
2027 	tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2;
2028 
2029 	tx_pkt.first_frag = fpdu->pkt_hdr;
2030 	tx_pkt.first_frag_len = fpdu->pkt_hdr_size;
2031 	tx_pkt.enable_ip_cksum = true;
2032 	tx_pkt.enable_l4_cksum = true;
2033 	tx_pkt.calc_ip_len = true;
2034 	/* vlan overload with enum iwarp_ll2_tx_queues */
2035 	tx_pkt.vlan = IWARP_LL2_ALIGNED_RIGHT_TRIMMED_TX_QUEUE;
2036 
2037 	ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle;
2038 
2039 	rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true);
2040 	if (rc)
2041 		DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2042 			   "Can't send right edge rc=%d\n", rc);
2043 	DP_VERBOSE(p_hwfn,
2044 		   QED_MSG_RDMA,
2045 		   "MPA_ALIGN: Sent right edge FPDU num_bds=%d [%lx, 0x%x], rc=%d\n",
2046 		   tx_pkt.num_of_bds,
2047 		   (unsigned long int)tx_pkt.first_frag,
2048 		   tx_pkt.first_frag_len, rc);
2049 
2050 	return rc;
2051 }
2052 
2053 static int
2054 qed_iwarp_send_fpdu(struct qed_hwfn *p_hwfn,
2055 		    struct qed_iwarp_fpdu *fpdu,
2056 		    struct unaligned_opaque_data *curr_pkt,
2057 		    struct qed_iwarp_ll2_buff *buf,
2058 		    u16 tcp_payload_size, enum qed_iwarp_mpa_pkt_type pkt_type)
2059 {
2060 	struct qed_ll2_tx_pkt_info tx_pkt;
2061 	u16 first_mpa_offset;
2062 	u8 ll2_handle;
2063 	int rc;
2064 
2065 	memset(&tx_pkt, 0, sizeof(tx_pkt));
2066 
2067 	/* An unaligned packet means it's split over two tcp segments. So the
2068 	 * complete packet requires 3 bds, one for the header, one for the
2069 	 * part of the fpdu of the first tcp segment, and the last fragment
2070 	 * will point to the remainder of the fpdu. A packed pdu, requires only
2071 	 * two bds, one for the header and one for the data.
2072 	 */
2073 	tx_pkt.num_of_bds = (pkt_type == QED_IWARP_MPA_PKT_UNALIGNED) ? 3 : 2;
2074 	tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
2075 	tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2; /* offset in words */
2076 
2077 	/* Send the mpa_buf only with the last fpdu (in case of packed) */
2078 	if (pkt_type == QED_IWARP_MPA_PKT_UNALIGNED ||
2079 	    tcp_payload_size <= fpdu->fpdu_length)
2080 		tx_pkt.cookie = fpdu->mpa_buf;
2081 
2082 	tx_pkt.first_frag = fpdu->pkt_hdr;
2083 	tx_pkt.first_frag_len = fpdu->pkt_hdr_size;
2084 	tx_pkt.enable_ip_cksum = true;
2085 	tx_pkt.enable_l4_cksum = true;
2086 	tx_pkt.calc_ip_len = true;
2087 	/* vlan overload with enum iwarp_ll2_tx_queues */
2088 	tx_pkt.vlan = IWARP_LL2_ALIGNED_TX_QUEUE;
2089 
2090 	/* special case of unaligned packet and not packed, need to send
2091 	 * both buffers as cookie to release.
2092 	 */
2093 	if (tcp_payload_size == fpdu->incomplete_bytes)
2094 		fpdu->mpa_buf->piggy_buf = buf;
2095 
2096 	ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle;
2097 
2098 	/* Set first fragment to header */
2099 	rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true);
2100 	if (rc)
2101 		goto out;
2102 
2103 	/* Set second fragment to first part of packet */
2104 	rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn, ll2_handle,
2105 					       fpdu->mpa_frag,
2106 					       fpdu->mpa_frag_len);
2107 	if (rc)
2108 		goto out;
2109 
2110 	if (!fpdu->incomplete_bytes)
2111 		goto out;
2112 
2113 	first_mpa_offset = le16_to_cpu(curr_pkt->first_mpa_offset);
2114 
2115 	/* Set third fragment to second part of the packet */
2116 	rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn,
2117 					       ll2_handle,
2118 					       buf->data_phys_addr +
2119 					       first_mpa_offset,
2120 					       fpdu->incomplete_bytes);
2121 out:
2122 	DP_VERBOSE(p_hwfn,
2123 		   QED_MSG_RDMA,
2124 		   "MPA_ALIGN: Sent FPDU num_bds=%d first_frag_len=%x, mpa_frag_len=0x%x, incomplete_bytes:0x%x rc=%d\n",
2125 		   tx_pkt.num_of_bds,
2126 		   tx_pkt.first_frag_len,
2127 		   fpdu->mpa_frag_len,
2128 		   fpdu->incomplete_bytes, rc);
2129 
2130 	return rc;
2131 }
2132 
2133 static void
2134 qed_iwarp_mpa_get_data(struct qed_hwfn *p_hwfn,
2135 		       struct unaligned_opaque_data *curr_pkt,
2136 		       u32 opaque_data0, u32 opaque_data1)
2137 {
2138 	u64 opaque_data;
2139 
2140 	opaque_data = HILO_64(cpu_to_le32(opaque_data1),
2141 			      cpu_to_le32(opaque_data0));
2142 	*curr_pkt = *((struct unaligned_opaque_data *)&opaque_data);
2143 
2144 	le16_add_cpu(&curr_pkt->first_mpa_offset,
2145 		     curr_pkt->tcp_payload_offset);
2146 }
2147 
2148 /* This function is called when an unaligned or incomplete MPA packet arrives
2149  * driver needs to align the packet, perhaps using previous data and send
2150  * it down to FW once it is aligned.
2151  */
2152 static int
2153 qed_iwarp_process_mpa_pkt(struct qed_hwfn *p_hwfn,
2154 			  struct qed_iwarp_ll2_mpa_buf *mpa_buf)
2155 {
2156 	struct unaligned_opaque_data *curr_pkt = &mpa_buf->data;
2157 	struct qed_iwarp_ll2_buff *buf = mpa_buf->ll2_buf;
2158 	enum qed_iwarp_mpa_pkt_type pkt_type;
2159 	struct qed_iwarp_fpdu *fpdu;
2160 	u16 cid, first_mpa_offset;
2161 	int rc = -EINVAL;
2162 	u8 *mpa_data;
2163 
2164 	cid = le32_to_cpu(curr_pkt->cid);
2165 
2166 	fpdu = qed_iwarp_get_curr_fpdu(p_hwfn, (u16)cid);
2167 	if (!fpdu) { /* something corrupt with cid, post rx back */
2168 		DP_ERR(p_hwfn, "Invalid cid, drop and post back to rx cid=%x\n",
2169 		       cid);
2170 		goto err;
2171 	}
2172 
2173 	do {
2174 		first_mpa_offset = le16_to_cpu(curr_pkt->first_mpa_offset);
2175 		mpa_data = ((u8 *)(buf->data) + first_mpa_offset);
2176 
2177 		pkt_type = qed_iwarp_mpa_classify(p_hwfn, fpdu,
2178 						  mpa_buf->tcp_payload_len,
2179 						  mpa_data);
2180 
2181 		switch (pkt_type) {
2182 		case QED_IWARP_MPA_PKT_PARTIAL:
2183 			qed_iwarp_init_fpdu(buf, fpdu,
2184 					    curr_pkt,
2185 					    mpa_buf->tcp_payload_len,
2186 					    mpa_buf->placement_offset);
2187 
2188 			if (!QED_IWARP_IS_RIGHT_EDGE(curr_pkt)) {
2189 				mpa_buf->tcp_payload_len = 0;
2190 				break;
2191 			}
2192 
2193 			rc = qed_iwarp_win_right_edge(p_hwfn, fpdu);
2194 
2195 			if (rc) {
2196 				DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2197 					   "Can't send FPDU:reset rc=%d\n", rc);
2198 				memset(fpdu, 0, sizeof(*fpdu));
2199 				break;
2200 			}
2201 
2202 			mpa_buf->tcp_payload_len = 0;
2203 			break;
2204 		case QED_IWARP_MPA_PKT_PACKED:
2205 			qed_iwarp_init_fpdu(buf, fpdu,
2206 					    curr_pkt,
2207 					    mpa_buf->tcp_payload_len,
2208 					    mpa_buf->placement_offset);
2209 
2210 			rc = qed_iwarp_send_fpdu(p_hwfn, fpdu, curr_pkt, buf,
2211 						 mpa_buf->tcp_payload_len,
2212 						 pkt_type);
2213 			if (rc) {
2214 				DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2215 					   "Can't send FPDU:reset rc=%d\n", rc);
2216 				memset(fpdu, 0, sizeof(*fpdu));
2217 				break;
2218 			}
2219 
2220 			mpa_buf->tcp_payload_len -= fpdu->fpdu_length;
2221 			le16_add_cpu(&curr_pkt->first_mpa_offset,
2222 				     fpdu->fpdu_length);
2223 			break;
2224 		case QED_IWARP_MPA_PKT_UNALIGNED:
2225 			qed_iwarp_update_fpdu_length(p_hwfn, fpdu, mpa_data);
2226 			if (mpa_buf->tcp_payload_len < fpdu->incomplete_bytes) {
2227 				/* special handling of fpdu split over more
2228 				 * than 2 segments
2229 				 */
2230 				if (QED_IWARP_IS_RIGHT_EDGE(curr_pkt)) {
2231 					rc = qed_iwarp_win_right_edge(p_hwfn,
2232 								      fpdu);
2233 					/* packet will be re-processed later */
2234 					if (rc)
2235 						return rc;
2236 				}
2237 
2238 				rc = qed_iwarp_cp_pkt(p_hwfn, fpdu, curr_pkt,
2239 						      buf,
2240 						      mpa_buf->tcp_payload_len);
2241 				if (rc) /* packet will be re-processed later */
2242 					return rc;
2243 
2244 				mpa_buf->tcp_payload_len = 0;
2245 				break;
2246 			}
2247 
2248 			rc = qed_iwarp_send_fpdu(p_hwfn, fpdu, curr_pkt, buf,
2249 						 mpa_buf->tcp_payload_len,
2250 						 pkt_type);
2251 			if (rc) {
2252 				DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2253 					   "Can't send FPDU:delay rc=%d\n", rc);
2254 				/* don't reset fpdu -> we need it for next
2255 				 * classify
2256 				 */
2257 				break;
2258 			}
2259 
2260 			mpa_buf->tcp_payload_len -= fpdu->incomplete_bytes;
2261 			le16_add_cpu(&curr_pkt->first_mpa_offset,
2262 				     fpdu->incomplete_bytes);
2263 
2264 			/* The framed PDU was sent - no more incomplete bytes */
2265 			fpdu->incomplete_bytes = 0;
2266 			break;
2267 		}
2268 	} while (mpa_buf->tcp_payload_len && !rc);
2269 
2270 	return rc;
2271 
2272 err:
2273 	qed_iwarp_ll2_post_rx(p_hwfn,
2274 			      buf,
2275 			      p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle);
2276 	return rc;
2277 }
2278 
2279 static void qed_iwarp_process_pending_pkts(struct qed_hwfn *p_hwfn)
2280 {
2281 	struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2282 	struct qed_iwarp_ll2_mpa_buf *mpa_buf = NULL;
2283 	int rc;
2284 
2285 	while (!list_empty(&iwarp_info->mpa_buf_pending_list)) {
2286 		mpa_buf = list_first_entry(&iwarp_info->mpa_buf_pending_list,
2287 					   struct qed_iwarp_ll2_mpa_buf,
2288 					   list_entry);
2289 
2290 		rc = qed_iwarp_process_mpa_pkt(p_hwfn, mpa_buf);
2291 
2292 		/* busy means break and continue processing later, don't
2293 		 * remove the buf from the pending list.
2294 		 */
2295 		if (rc == -EBUSY)
2296 			break;
2297 
2298 		list_move_tail(&mpa_buf->list_entry,
2299 			       &iwarp_info->mpa_buf_list);
2300 
2301 		if (rc) {	/* different error, don't continue */
2302 			DP_NOTICE(p_hwfn, "process pkts failed rc=%d\n", rc);
2303 			break;
2304 		}
2305 	}
2306 }
2307 
2308 static void
2309 qed_iwarp_ll2_comp_mpa_pkt(void *cxt, struct qed_ll2_comp_rx_data *data)
2310 {
2311 	struct qed_iwarp_ll2_mpa_buf *mpa_buf;
2312 	struct qed_iwarp_info *iwarp_info;
2313 	struct qed_hwfn *p_hwfn = cxt;
2314 	u16 first_mpa_offset;
2315 
2316 	iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2317 	mpa_buf = list_first_entry(&iwarp_info->mpa_buf_list,
2318 				   struct qed_iwarp_ll2_mpa_buf, list_entry);
2319 	if (!mpa_buf) {
2320 		DP_ERR(p_hwfn, "No free mpa buf\n");
2321 		goto err;
2322 	}
2323 
2324 	list_del(&mpa_buf->list_entry);
2325 	qed_iwarp_mpa_get_data(p_hwfn, &mpa_buf->data,
2326 			       data->opaque_data_0, data->opaque_data_1);
2327 
2328 	first_mpa_offset = le16_to_cpu(mpa_buf->data.first_mpa_offset);
2329 
2330 	DP_VERBOSE(p_hwfn,
2331 		   QED_MSG_RDMA,
2332 		   "LL2 MPA CompRx payload_len:0x%x\tfirst_mpa_offset:0x%x\ttcp_payload_offset:0x%x\tflags:0x%x\tcid:0x%x\n",
2333 		   data->length.packet_length, first_mpa_offset,
2334 		   mpa_buf->data.tcp_payload_offset, mpa_buf->data.flags,
2335 		   mpa_buf->data.cid);
2336 
2337 	mpa_buf->ll2_buf = data->cookie;
2338 	mpa_buf->tcp_payload_len = data->length.packet_length -
2339 				   first_mpa_offset;
2340 
2341 	first_mpa_offset += data->u.placement_offset;
2342 	mpa_buf->data.first_mpa_offset = cpu_to_le16(first_mpa_offset);
2343 	mpa_buf->placement_offset = data->u.placement_offset;
2344 
2345 	list_add_tail(&mpa_buf->list_entry, &iwarp_info->mpa_buf_pending_list);
2346 
2347 	qed_iwarp_process_pending_pkts(p_hwfn);
2348 	return;
2349 err:
2350 	qed_iwarp_ll2_post_rx(p_hwfn, data->cookie,
2351 			      iwarp_info->ll2_mpa_handle);
2352 }
2353 
2354 static void
2355 qed_iwarp_ll2_comp_syn_pkt(void *cxt, struct qed_ll2_comp_rx_data *data)
2356 {
2357 	struct qed_iwarp_ll2_buff *buf = data->cookie;
2358 	struct qed_iwarp_listener *listener;
2359 	struct qed_ll2_tx_pkt_info tx_pkt;
2360 	struct qed_iwarp_cm_info cm_info;
2361 	struct qed_hwfn *p_hwfn = cxt;
2362 	u8 remote_mac_addr[ETH_ALEN];
2363 	u8 local_mac_addr[ETH_ALEN];
2364 	struct qed_iwarp_ep *ep;
2365 	int tcp_start_offset;
2366 	u8 ll2_syn_handle;
2367 	int payload_len;
2368 	u32 hdr_size;
2369 	int rc;
2370 
2371 	memset(&cm_info, 0, sizeof(cm_info));
2372 	ll2_syn_handle = p_hwfn->p_rdma_info->iwarp.ll2_syn_handle;
2373 
2374 	/* Check if packet was received with errors... */
2375 	if (data->err_flags) {
2376 		DP_NOTICE(p_hwfn, "Error received on SYN packet: 0x%x\n",
2377 			  data->err_flags);
2378 		goto err;
2379 	}
2380 
2381 	if (GET_FIELD(data->parse_flags,
2382 		      PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED) &&
2383 	    GET_FIELD(data->parse_flags, PARSING_AND_ERR_FLAGS_L4CHKSMERROR)) {
2384 		DP_NOTICE(p_hwfn, "Syn packet received with checksum error\n");
2385 		goto err;
2386 	}
2387 
2388 	rc = qed_iwarp_parse_rx_pkt(p_hwfn, &cm_info, (u8 *)(buf->data) +
2389 				    data->u.placement_offset, remote_mac_addr,
2390 				    local_mac_addr, &payload_len,
2391 				    &tcp_start_offset);
2392 	if (rc)
2393 		goto err;
2394 
2395 	/* Check if there is a listener for this 4-tuple+vlan */
2396 	listener = qed_iwarp_get_listener(p_hwfn, &cm_info);
2397 	if (!listener) {
2398 		DP_VERBOSE(p_hwfn,
2399 			   QED_MSG_RDMA,
2400 			   "SYN received on tuple not listened on parse_flags=%d packet len=%d\n",
2401 			   data->parse_flags, data->length.packet_length);
2402 
2403 		memset(&tx_pkt, 0, sizeof(tx_pkt));
2404 		tx_pkt.num_of_bds = 1;
2405 		tx_pkt.l4_hdr_offset_w = (data->length.packet_length) >> 2;
2406 		tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
2407 		tx_pkt.first_frag = buf->data_phys_addr +
2408 				    data->u.placement_offset;
2409 		tx_pkt.first_frag_len = data->length.packet_length;
2410 		tx_pkt.cookie = buf;
2411 
2412 		rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_syn_handle,
2413 					       &tx_pkt, true);
2414 
2415 		if (rc) {
2416 			DP_NOTICE(p_hwfn,
2417 				  "Can't post SYN back to chip rc=%d\n", rc);
2418 			goto err;
2419 		}
2420 		return;
2421 	}
2422 
2423 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "Received syn on listening port\n");
2424 	/* There may be an open ep on this connection if this is a syn
2425 	 * retrasnmit... need to make sure there isn't...
2426 	 */
2427 	if (qed_iwarp_ep_exists(p_hwfn, &cm_info))
2428 		goto err;
2429 
2430 	ep = qed_iwarp_get_free_ep(p_hwfn);
2431 	if (!ep)
2432 		goto err;
2433 
2434 	spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2435 	list_add_tail(&ep->list_entry, &p_hwfn->p_rdma_info->iwarp.ep_list);
2436 	spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2437 
2438 	ether_addr_copy(ep->remote_mac_addr, remote_mac_addr);
2439 	ether_addr_copy(ep->local_mac_addr, local_mac_addr);
2440 
2441 	memcpy(&ep->cm_info, &cm_info, sizeof(ep->cm_info));
2442 
2443 	hdr_size = ((cm_info.ip_version == QED_TCP_IPV4) ? 40 : 60);
2444 	ep->mss = p_hwfn->p_rdma_info->iwarp.max_mtu - hdr_size;
2445 	ep->mss = min_t(u16, QED_IWARP_MAX_FW_MSS, ep->mss);
2446 
2447 	ep->event_cb = listener->event_cb;
2448 	ep->cb_context = listener->cb_context;
2449 	ep->connect_mode = TCP_CONNECT_PASSIVE;
2450 
2451 	ep->syn = buf;
2452 	ep->syn_ip_payload_length = (u16)payload_len;
2453 	ep->syn_phy_addr = buf->data_phys_addr + data->u.placement_offset +
2454 			   tcp_start_offset;
2455 
2456 	rc = qed_iwarp_tcp_offload(p_hwfn, ep);
2457 	if (rc) {
2458 		qed_iwarp_return_ep(p_hwfn, ep);
2459 		goto err;
2460 	}
2461 
2462 	return;
2463 err:
2464 	qed_iwarp_ll2_post_rx(p_hwfn, buf, ll2_syn_handle);
2465 }
2466 
2467 static void qed_iwarp_ll2_rel_rx_pkt(void *cxt, u8 connection_handle,
2468 				     void *cookie, dma_addr_t rx_buf_addr,
2469 				     bool b_last_packet)
2470 {
2471 	struct qed_iwarp_ll2_buff *buffer = cookie;
2472 	struct qed_hwfn *p_hwfn = cxt;
2473 
2474 	dma_free_coherent(&p_hwfn->cdev->pdev->dev, buffer->buff_size,
2475 			  buffer->data, buffer->data_phys_addr);
2476 	kfree(buffer);
2477 }
2478 
2479 static void qed_iwarp_ll2_comp_tx_pkt(void *cxt, u8 connection_handle,
2480 				      void *cookie, dma_addr_t first_frag_addr,
2481 				      bool b_last_fragment, bool b_last_packet)
2482 {
2483 	struct qed_iwarp_ll2_buff *buffer = cookie;
2484 	struct qed_iwarp_ll2_buff *piggy;
2485 	struct qed_hwfn *p_hwfn = cxt;
2486 
2487 	if (!buffer)		/* can happen in packed mpa unaligned... */
2488 		return;
2489 
2490 	/* this was originally an rx packet, post it back */
2491 	piggy = buffer->piggy_buf;
2492 	if (piggy) {
2493 		buffer->piggy_buf = NULL;
2494 		qed_iwarp_ll2_post_rx(p_hwfn, piggy, connection_handle);
2495 	}
2496 
2497 	qed_iwarp_ll2_post_rx(p_hwfn, buffer, connection_handle);
2498 
2499 	if (connection_handle == p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle)
2500 		qed_iwarp_process_pending_pkts(p_hwfn);
2501 
2502 	return;
2503 }
2504 
2505 static void qed_iwarp_ll2_rel_tx_pkt(void *cxt, u8 connection_handle,
2506 				     void *cookie, dma_addr_t first_frag_addr,
2507 				     bool b_last_fragment, bool b_last_packet)
2508 {
2509 	struct qed_iwarp_ll2_buff *buffer = cookie;
2510 	struct qed_hwfn *p_hwfn = cxt;
2511 
2512 	if (!buffer)
2513 		return;
2514 
2515 	if (buffer->piggy_buf) {
2516 		dma_free_coherent(&p_hwfn->cdev->pdev->dev,
2517 				  buffer->piggy_buf->buff_size,
2518 				  buffer->piggy_buf->data,
2519 				  buffer->piggy_buf->data_phys_addr);
2520 
2521 		kfree(buffer->piggy_buf);
2522 	}
2523 
2524 	dma_free_coherent(&p_hwfn->cdev->pdev->dev, buffer->buff_size,
2525 			  buffer->data, buffer->data_phys_addr);
2526 
2527 	kfree(buffer);
2528 }
2529 
2530 /* The only slowpath for iwarp ll2 is unalign flush. When this completion
2531  * is received, need to reset the FPDU.
2532  */
2533 static void
2534 qed_iwarp_ll2_slowpath(void *cxt,
2535 		       u8 connection_handle,
2536 		       u32 opaque_data_0, u32 opaque_data_1)
2537 {
2538 	struct unaligned_opaque_data unalign_data;
2539 	struct qed_hwfn *p_hwfn = cxt;
2540 	struct qed_iwarp_fpdu *fpdu;
2541 	u32 cid;
2542 
2543 	qed_iwarp_mpa_get_data(p_hwfn, &unalign_data,
2544 			       opaque_data_0, opaque_data_1);
2545 
2546 	cid = le32_to_cpu(unalign_data.cid);
2547 
2548 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "(0x%x) Flush fpdu\n", cid);
2549 
2550 	fpdu = qed_iwarp_get_curr_fpdu(p_hwfn, (u16)cid);
2551 	if (fpdu)
2552 		memset(fpdu, 0, sizeof(*fpdu));
2553 }
2554 
2555 static int qed_iwarp_ll2_stop(struct qed_hwfn *p_hwfn)
2556 {
2557 	struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2558 	int rc = 0;
2559 
2560 	if (iwarp_info->ll2_syn_handle != QED_IWARP_HANDLE_INVAL) {
2561 		rc = qed_ll2_terminate_connection(p_hwfn,
2562 						  iwarp_info->ll2_syn_handle);
2563 		if (rc)
2564 			DP_INFO(p_hwfn, "Failed to terminate syn connection\n");
2565 
2566 		qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_syn_handle);
2567 		iwarp_info->ll2_syn_handle = QED_IWARP_HANDLE_INVAL;
2568 	}
2569 
2570 	if (iwarp_info->ll2_ooo_handle != QED_IWARP_HANDLE_INVAL) {
2571 		rc = qed_ll2_terminate_connection(p_hwfn,
2572 						  iwarp_info->ll2_ooo_handle);
2573 		if (rc)
2574 			DP_INFO(p_hwfn, "Failed to terminate ooo connection\n");
2575 
2576 		qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_ooo_handle);
2577 		iwarp_info->ll2_ooo_handle = QED_IWARP_HANDLE_INVAL;
2578 	}
2579 
2580 	if (iwarp_info->ll2_mpa_handle != QED_IWARP_HANDLE_INVAL) {
2581 		rc = qed_ll2_terminate_connection(p_hwfn,
2582 						  iwarp_info->ll2_mpa_handle);
2583 		if (rc)
2584 			DP_INFO(p_hwfn, "Failed to terminate mpa connection\n");
2585 
2586 		qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_mpa_handle);
2587 		iwarp_info->ll2_mpa_handle = QED_IWARP_HANDLE_INVAL;
2588 	}
2589 
2590 	qed_llh_remove_mac_filter(p_hwfn->cdev, 0,
2591 				  p_hwfn->p_rdma_info->iwarp.mac_addr);
2592 
2593 	return rc;
2594 }
2595 
2596 static int
2597 qed_iwarp_ll2_alloc_buffers(struct qed_hwfn *p_hwfn,
2598 			    int num_rx_bufs, int buff_size, u8 ll2_handle)
2599 {
2600 	struct qed_iwarp_ll2_buff *buffer;
2601 	int rc = 0;
2602 	int i;
2603 
2604 	for (i = 0; i < num_rx_bufs; i++) {
2605 		buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2606 		if (!buffer) {
2607 			rc = -ENOMEM;
2608 			break;
2609 		}
2610 
2611 		buffer->data = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
2612 						  buff_size,
2613 						  &buffer->data_phys_addr,
2614 						  GFP_KERNEL);
2615 		if (!buffer->data) {
2616 			kfree(buffer);
2617 			rc = -ENOMEM;
2618 			break;
2619 		}
2620 
2621 		buffer->buff_size = buff_size;
2622 		rc = qed_iwarp_ll2_post_rx(p_hwfn, buffer, ll2_handle);
2623 		if (rc)
2624 			/* buffers will be deallocated by qed_ll2 */
2625 			break;
2626 	}
2627 	return rc;
2628 }
2629 
2630 #define QED_IWARP_MAX_BUF_SIZE(mtu)				     \
2631 	ALIGN((mtu) + ETH_HLEN + 2 * VLAN_HLEN + 2 + ETH_CACHE_LINE_SIZE, \
2632 		ETH_CACHE_LINE_SIZE)
2633 
2634 static int
2635 qed_iwarp_ll2_start(struct qed_hwfn *p_hwfn,
2636 		    struct qed_rdma_start_in_params *params,
2637 		    u32 rcv_wnd_size)
2638 {
2639 	struct qed_iwarp_info *iwarp_info;
2640 	struct qed_ll2_acquire_data data;
2641 	struct qed_ll2_cbs cbs;
2642 	u32 buff_size;
2643 	u16 n_ooo_bufs;
2644 	int rc = 0;
2645 	int i;
2646 
2647 	iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2648 	iwarp_info->ll2_syn_handle = QED_IWARP_HANDLE_INVAL;
2649 	iwarp_info->ll2_ooo_handle = QED_IWARP_HANDLE_INVAL;
2650 	iwarp_info->ll2_mpa_handle = QED_IWARP_HANDLE_INVAL;
2651 
2652 	iwarp_info->max_mtu = params->max_mtu;
2653 
2654 	ether_addr_copy(p_hwfn->p_rdma_info->iwarp.mac_addr, params->mac_addr);
2655 
2656 	rc = qed_llh_add_mac_filter(p_hwfn->cdev, 0, params->mac_addr);
2657 	if (rc)
2658 		return rc;
2659 
2660 	/* Start SYN connection */
2661 	cbs.rx_comp_cb = qed_iwarp_ll2_comp_syn_pkt;
2662 	cbs.rx_release_cb = qed_iwarp_ll2_rel_rx_pkt;
2663 	cbs.tx_comp_cb = qed_iwarp_ll2_comp_tx_pkt;
2664 	cbs.tx_release_cb = qed_iwarp_ll2_rel_tx_pkt;
2665 	cbs.slowpath_cb = NULL;
2666 	cbs.cookie = p_hwfn;
2667 
2668 	memset(&data, 0, sizeof(data));
2669 	data.input.conn_type = QED_LL2_TYPE_IWARP;
2670 	/* SYN will use ctx based queues */
2671 	data.input.rx_conn_type = QED_LL2_RX_TYPE_CTX;
2672 	data.input.mtu = params->max_mtu;
2673 	data.input.rx_num_desc = QED_IWARP_LL2_SYN_RX_SIZE;
2674 	data.input.tx_num_desc = QED_IWARP_LL2_SYN_TX_SIZE;
2675 	data.input.tx_max_bds_per_packet = 1;	/* will never be fragmented */
2676 	data.input.tx_tc = PKT_LB_TC;
2677 	data.input.tx_dest = QED_LL2_TX_DEST_LB;
2678 	data.p_connection_handle = &iwarp_info->ll2_syn_handle;
2679 	data.cbs = &cbs;
2680 
2681 	rc = qed_ll2_acquire_connection(p_hwfn, &data);
2682 	if (rc) {
2683 		DP_NOTICE(p_hwfn, "Failed to acquire LL2 connection\n");
2684 		qed_llh_remove_mac_filter(p_hwfn->cdev, 0, params->mac_addr);
2685 		return rc;
2686 	}
2687 
2688 	rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_syn_handle);
2689 	if (rc) {
2690 		DP_NOTICE(p_hwfn, "Failed to establish LL2 connection\n");
2691 		goto err;
2692 	}
2693 
2694 	buff_size = QED_IWARP_MAX_BUF_SIZE(params->max_mtu);
2695 	rc = qed_iwarp_ll2_alloc_buffers(p_hwfn,
2696 					 QED_IWARP_LL2_SYN_RX_SIZE,
2697 					 buff_size,
2698 					 iwarp_info->ll2_syn_handle);
2699 	if (rc)
2700 		goto err;
2701 
2702 	/* Start OOO connection */
2703 	data.input.conn_type = QED_LL2_TYPE_OOO;
2704 	/* OOO/unaligned will use legacy ll2 queues (ram based) */
2705 	data.input.rx_conn_type = QED_LL2_RX_TYPE_LEGACY;
2706 	data.input.mtu = params->max_mtu;
2707 
2708 	n_ooo_bufs = (QED_IWARP_MAX_OOO * rcv_wnd_size) /
2709 		     iwarp_info->max_mtu;
2710 	n_ooo_bufs = min_t(u32, n_ooo_bufs, QED_IWARP_LL2_OOO_MAX_RX_SIZE);
2711 
2712 	data.input.rx_num_desc = n_ooo_bufs;
2713 	data.input.rx_num_ooo_buffers = n_ooo_bufs;
2714 
2715 	data.input.tx_max_bds_per_packet = 1;	/* will never be fragmented */
2716 	data.input.tx_num_desc = QED_IWARP_LL2_OOO_DEF_TX_SIZE;
2717 	data.p_connection_handle = &iwarp_info->ll2_ooo_handle;
2718 
2719 	rc = qed_ll2_acquire_connection(p_hwfn, &data);
2720 	if (rc)
2721 		goto err;
2722 
2723 	rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_ooo_handle);
2724 	if (rc)
2725 		goto err;
2726 
2727 	/* Start Unaligned MPA connection */
2728 	cbs.rx_comp_cb = qed_iwarp_ll2_comp_mpa_pkt;
2729 	cbs.slowpath_cb = qed_iwarp_ll2_slowpath;
2730 
2731 	memset(&data, 0, sizeof(data));
2732 	data.input.conn_type = QED_LL2_TYPE_IWARP;
2733 	data.input.mtu = params->max_mtu;
2734 	/* FW requires that once a packet arrives OOO, it must have at
2735 	 * least 2 rx buffers available on the unaligned connection
2736 	 * for handling the case that it is a partial fpdu.
2737 	 */
2738 	data.input.rx_num_desc = n_ooo_bufs * 2;
2739 	data.input.tx_num_desc = data.input.rx_num_desc;
2740 	data.input.tx_max_bds_per_packet = QED_IWARP_MAX_BDS_PER_FPDU;
2741 	data.input.tx_tc = PKT_LB_TC;
2742 	data.input.tx_dest = QED_LL2_TX_DEST_LB;
2743 	data.p_connection_handle = &iwarp_info->ll2_mpa_handle;
2744 	data.input.secondary_queue = true;
2745 	data.cbs = &cbs;
2746 
2747 	rc = qed_ll2_acquire_connection(p_hwfn, &data);
2748 	if (rc)
2749 		goto err;
2750 
2751 	rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_mpa_handle);
2752 	if (rc)
2753 		goto err;
2754 
2755 	rc = qed_iwarp_ll2_alloc_buffers(p_hwfn,
2756 					 data.input.rx_num_desc,
2757 					 buff_size,
2758 					 iwarp_info->ll2_mpa_handle);
2759 	if (rc)
2760 		goto err;
2761 
2762 	iwarp_info->partial_fpdus = kcalloc((u16)p_hwfn->p_rdma_info->num_qps,
2763 					    sizeof(*iwarp_info->partial_fpdus),
2764 					    GFP_KERNEL);
2765 	if (!iwarp_info->partial_fpdus) {
2766 		rc = -ENOMEM;
2767 		goto err;
2768 	}
2769 
2770 	iwarp_info->max_num_partial_fpdus = (u16)p_hwfn->p_rdma_info->num_qps;
2771 
2772 	iwarp_info->mpa_intermediate_buf = kzalloc(buff_size, GFP_KERNEL);
2773 	if (!iwarp_info->mpa_intermediate_buf) {
2774 		rc = -ENOMEM;
2775 		goto err;
2776 	}
2777 
2778 	/* The mpa_bufs array serves for pending RX packets received on the
2779 	 * mpa ll2 that don't have place on the tx ring and require later
2780 	 * processing. We can't fail on allocation of such a struct therefore
2781 	 * we allocate enough to take care of all rx packets
2782 	 */
2783 	iwarp_info->mpa_bufs = kcalloc(data.input.rx_num_desc,
2784 				       sizeof(*iwarp_info->mpa_bufs),
2785 				       GFP_KERNEL);
2786 	if (!iwarp_info->mpa_bufs) {
2787 		rc = -ENOMEM;
2788 		goto err;
2789 	}
2790 
2791 	INIT_LIST_HEAD(&iwarp_info->mpa_buf_pending_list);
2792 	INIT_LIST_HEAD(&iwarp_info->mpa_buf_list);
2793 	for (i = 0; i < data.input.rx_num_desc; i++)
2794 		list_add_tail(&iwarp_info->mpa_bufs[i].list_entry,
2795 			      &iwarp_info->mpa_buf_list);
2796 	return rc;
2797 err:
2798 	qed_iwarp_ll2_stop(p_hwfn);
2799 
2800 	return rc;
2801 }
2802 
2803 static struct {
2804 	u32 two_ports;
2805 	u32 four_ports;
2806 } qed_iwarp_rcv_wnd_size[MAX_CHIP_IDS] = {
2807 	{QED_IWARP_RCV_WND_SIZE_DEF_BB_2P, QED_IWARP_RCV_WND_SIZE_DEF_BB_4P},
2808 	{QED_IWARP_RCV_WND_SIZE_DEF_AH_2P, QED_IWARP_RCV_WND_SIZE_DEF_AH_4P}
2809 };
2810 
2811 int qed_iwarp_setup(struct qed_hwfn *p_hwfn,
2812 		    struct qed_rdma_start_in_params *params)
2813 {
2814 	struct qed_dev *cdev = p_hwfn->cdev;
2815 	struct qed_iwarp_info *iwarp_info;
2816 	enum chip_ids chip_id;
2817 	u32 rcv_wnd_size;
2818 
2819 	iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2820 
2821 	iwarp_info->tcp_flags = QED_IWARP_TS_EN;
2822 
2823 	chip_id = QED_IS_BB(cdev) ? CHIP_BB : CHIP_K2;
2824 	rcv_wnd_size = (qed_device_num_ports(cdev) == 4) ?
2825 		qed_iwarp_rcv_wnd_size[chip_id].four_ports :
2826 		qed_iwarp_rcv_wnd_size[chip_id].two_ports;
2827 
2828 	/* value 0 is used for ilog2(QED_IWARP_RCV_WND_SIZE_MIN) */
2829 	iwarp_info->rcv_wnd_scale = ilog2(rcv_wnd_size) -
2830 	    ilog2(QED_IWARP_RCV_WND_SIZE_MIN);
2831 	iwarp_info->rcv_wnd_size = rcv_wnd_size >> iwarp_info->rcv_wnd_scale;
2832 	iwarp_info->crc_needed = QED_IWARP_PARAM_CRC_NEEDED;
2833 	iwarp_info->mpa_rev = MPA_NEGOTIATION_TYPE_ENHANCED;
2834 
2835 	iwarp_info->peer2peer = QED_IWARP_PARAM_P2P;
2836 
2837 	iwarp_info->rtr_type =  MPA_RTR_TYPE_ZERO_SEND |
2838 				MPA_RTR_TYPE_ZERO_WRITE |
2839 				MPA_RTR_TYPE_ZERO_READ;
2840 
2841 	spin_lock_init(&p_hwfn->p_rdma_info->iwarp.qp_lock);
2842 	INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.ep_list);
2843 	INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.listen_list);
2844 
2845 	qed_spq_register_async_cb(p_hwfn, PROTOCOLID_IWARP,
2846 				  qed_iwarp_async_event);
2847 	qed_ooo_setup(p_hwfn);
2848 
2849 	return qed_iwarp_ll2_start(p_hwfn, params, rcv_wnd_size);
2850 }
2851 
2852 int qed_iwarp_stop(struct qed_hwfn *p_hwfn)
2853 {
2854 	int rc;
2855 
2856 	qed_iwarp_free_prealloc_ep(p_hwfn);
2857 	rc = qed_iwarp_wait_for_all_cids(p_hwfn);
2858 	if (rc)
2859 		return rc;
2860 
2861 	return qed_iwarp_ll2_stop(p_hwfn);
2862 }
2863 
2864 static void qed_iwarp_qp_in_error(struct qed_hwfn *p_hwfn,
2865 				  struct qed_iwarp_ep *ep,
2866 				  u8 fw_return_code)
2867 {
2868 	struct qed_iwarp_cm_event_params params;
2869 
2870 	qed_iwarp_modify_qp(p_hwfn, ep->qp, QED_IWARP_QP_STATE_ERROR, true);
2871 
2872 	params.event = QED_IWARP_EVENT_CLOSE;
2873 	params.ep_context = ep;
2874 	params.cm_info = &ep->cm_info;
2875 	params.status = (fw_return_code == IWARP_QP_IN_ERROR_GOOD_CLOSE) ?
2876 			 0 : -ECONNRESET;
2877 
2878 	/* paired with READ_ONCE in destroy_qp */
2879 	smp_store_release(&ep->state, QED_IWARP_EP_CLOSED);
2880 
2881 	spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2882 	list_del(&ep->list_entry);
2883 	spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2884 
2885 	ep->event_cb(ep->cb_context, &params);
2886 }
2887 
2888 static void qed_iwarp_exception_received(struct qed_hwfn *p_hwfn,
2889 					 struct qed_iwarp_ep *ep,
2890 					 int fw_ret_code)
2891 {
2892 	struct qed_iwarp_cm_event_params params;
2893 	bool event_cb = false;
2894 
2895 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "EP(0x%x) fw_ret_code=%d\n",
2896 		   ep->cid, fw_ret_code);
2897 
2898 	switch (fw_ret_code) {
2899 	case IWARP_EXCEPTION_DETECTED_LLP_CLOSED:
2900 		params.status = 0;
2901 		params.event = QED_IWARP_EVENT_DISCONNECT;
2902 		event_cb = true;
2903 		break;
2904 	case IWARP_EXCEPTION_DETECTED_LLP_RESET:
2905 		params.status = -ECONNRESET;
2906 		params.event = QED_IWARP_EVENT_DISCONNECT;
2907 		event_cb = true;
2908 		break;
2909 	case IWARP_EXCEPTION_DETECTED_RQ_EMPTY:
2910 		params.event = QED_IWARP_EVENT_RQ_EMPTY;
2911 		event_cb = true;
2912 		break;
2913 	case IWARP_EXCEPTION_DETECTED_IRQ_FULL:
2914 		params.event = QED_IWARP_EVENT_IRQ_FULL;
2915 		event_cb = true;
2916 		break;
2917 	case IWARP_EXCEPTION_DETECTED_LLP_TIMEOUT:
2918 		params.event = QED_IWARP_EVENT_LLP_TIMEOUT;
2919 		event_cb = true;
2920 		break;
2921 	case IWARP_EXCEPTION_DETECTED_REMOTE_PROTECTION_ERROR:
2922 		params.event = QED_IWARP_EVENT_REMOTE_PROTECTION_ERROR;
2923 		event_cb = true;
2924 		break;
2925 	case IWARP_EXCEPTION_DETECTED_CQ_OVERFLOW:
2926 		params.event = QED_IWARP_EVENT_CQ_OVERFLOW;
2927 		event_cb = true;
2928 		break;
2929 	case IWARP_EXCEPTION_DETECTED_LOCAL_CATASTROPHIC:
2930 		params.event = QED_IWARP_EVENT_QP_CATASTROPHIC;
2931 		event_cb = true;
2932 		break;
2933 	case IWARP_EXCEPTION_DETECTED_LOCAL_ACCESS_ERROR:
2934 		params.event = QED_IWARP_EVENT_LOCAL_ACCESS_ERROR;
2935 		event_cb = true;
2936 		break;
2937 	case IWARP_EXCEPTION_DETECTED_REMOTE_OPERATION_ERROR:
2938 		params.event = QED_IWARP_EVENT_REMOTE_OPERATION_ERROR;
2939 		event_cb = true;
2940 		break;
2941 	case IWARP_EXCEPTION_DETECTED_TERMINATE_RECEIVED:
2942 		params.event = QED_IWARP_EVENT_TERMINATE_RECEIVED;
2943 		event_cb = true;
2944 		break;
2945 	default:
2946 		DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2947 			   "Unhandled exception received...fw_ret_code=%d\n",
2948 			   fw_ret_code);
2949 		break;
2950 	}
2951 
2952 	if (event_cb) {
2953 		params.ep_context = ep;
2954 		params.cm_info = &ep->cm_info;
2955 		ep->event_cb(ep->cb_context, &params);
2956 	}
2957 }
2958 
2959 static void
2960 qed_iwarp_tcp_connect_unsuccessful(struct qed_hwfn *p_hwfn,
2961 				   struct qed_iwarp_ep *ep, u8 fw_return_code)
2962 {
2963 	struct qed_iwarp_cm_event_params params;
2964 
2965 	memset(&params, 0, sizeof(params));
2966 	params.event = QED_IWARP_EVENT_ACTIVE_COMPLETE;
2967 	params.ep_context = ep;
2968 	params.cm_info = &ep->cm_info;
2969 	/* paired with READ_ONCE in destroy_qp */
2970 	smp_store_release(&ep->state, QED_IWARP_EP_CLOSED);
2971 
2972 	switch (fw_return_code) {
2973 	case IWARP_CONN_ERROR_TCP_CONNECT_INVALID_PACKET:
2974 		DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2975 			   "%s(0x%x) TCP connect got invalid packet\n",
2976 			   QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2977 		params.status = -ECONNRESET;
2978 		break;
2979 	case IWARP_CONN_ERROR_TCP_CONNECTION_RST:
2980 		DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2981 			   "%s(0x%x) TCP Connection Reset\n",
2982 			   QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2983 		params.status = -ECONNRESET;
2984 		break;
2985 	case IWARP_CONN_ERROR_TCP_CONNECT_TIMEOUT:
2986 		DP_NOTICE(p_hwfn, "%s(0x%x) TCP timeout\n",
2987 			  QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2988 		params.status = -EBUSY;
2989 		break;
2990 	case IWARP_CONN_ERROR_MPA_NOT_SUPPORTED_VER:
2991 		DP_NOTICE(p_hwfn, "%s(0x%x) MPA not supported VER\n",
2992 			  QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2993 		params.status = -ECONNREFUSED;
2994 		break;
2995 	case IWARP_CONN_ERROR_MPA_INVALID_PACKET:
2996 		DP_NOTICE(p_hwfn, "%s(0x%x) MPA Invalid Packet\n",
2997 			  QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2998 		params.status = -ECONNRESET;
2999 		break;
3000 	default:
3001 		DP_ERR(p_hwfn,
3002 		       "%s(0x%x) Unexpected return code tcp connect: %d\n",
3003 		       QED_IWARP_CONNECT_MODE_STRING(ep),
3004 		       ep->tcp_cid, fw_return_code);
3005 		params.status = -ECONNRESET;
3006 		break;
3007 	}
3008 
3009 	if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
3010 		ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
3011 		qed_iwarp_return_ep(p_hwfn, ep);
3012 	} else {
3013 		ep->event_cb(ep->cb_context, &params);
3014 		spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3015 		list_del(&ep->list_entry);
3016 		spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3017 	}
3018 }
3019 
3020 static void
3021 qed_iwarp_connect_complete(struct qed_hwfn *p_hwfn,
3022 			   struct qed_iwarp_ep *ep, u8 fw_return_code)
3023 {
3024 	u8 ll2_syn_handle = p_hwfn->p_rdma_info->iwarp.ll2_syn_handle;
3025 
3026 	if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
3027 		/* Done with the SYN packet, post back to ll2 rx */
3028 		qed_iwarp_ll2_post_rx(p_hwfn, ep->syn, ll2_syn_handle);
3029 
3030 		ep->syn = NULL;
3031 
3032 		/* If connect failed - upper layer doesn't know about it */
3033 		if (fw_return_code == RDMA_RETURN_OK)
3034 			qed_iwarp_mpa_received(p_hwfn, ep);
3035 		else
3036 			qed_iwarp_tcp_connect_unsuccessful(p_hwfn, ep,
3037 							   fw_return_code);
3038 	} else {
3039 		if (fw_return_code == RDMA_RETURN_OK)
3040 			qed_iwarp_mpa_offload(p_hwfn, ep);
3041 		else
3042 			qed_iwarp_tcp_connect_unsuccessful(p_hwfn, ep,
3043 							   fw_return_code);
3044 	}
3045 }
3046 
3047 static inline bool
3048 qed_iwarp_check_ep_ok(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
3049 {
3050 	if (!ep || (ep->sig != QED_EP_SIG)) {
3051 		DP_ERR(p_hwfn, "ERROR ON ASYNC ep=%p\n", ep);
3052 		return false;
3053 	}
3054 
3055 	return true;
3056 }
3057 
3058 static int qed_iwarp_async_event(struct qed_hwfn *p_hwfn, u8 fw_event_code,
3059 				 __le16 echo, union event_ring_data *data,
3060 				 u8 fw_return_code)
3061 {
3062 	struct qed_rdma_events events = p_hwfn->p_rdma_info->events;
3063 	struct regpair *fw_handle = &data->rdma_data.async_handle;
3064 	struct qed_iwarp_ep *ep = NULL;
3065 	u16 srq_offset;
3066 	u16 srq_id;
3067 	u16 cid;
3068 
3069 	ep = (struct qed_iwarp_ep *)(uintptr_t)HILO_64(fw_handle->hi,
3070 						       fw_handle->lo);
3071 
3072 	switch (fw_event_code) {
3073 	case IWARP_EVENT_TYPE_ASYNC_CONNECT_COMPLETE:
3074 		/* Async completion after TCP 3-way handshake */
3075 		if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3076 			return -EINVAL;
3077 		DP_VERBOSE(p_hwfn,
3078 			   QED_MSG_RDMA,
3079 			   "EP(0x%x) IWARP_EVENT_TYPE_ASYNC_CONNECT_COMPLETE fw_ret_code=%d\n",
3080 			   ep->tcp_cid, fw_return_code);
3081 		qed_iwarp_connect_complete(p_hwfn, ep, fw_return_code);
3082 		break;
3083 	case IWARP_EVENT_TYPE_ASYNC_EXCEPTION_DETECTED:
3084 		if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3085 			return -EINVAL;
3086 		DP_VERBOSE(p_hwfn,
3087 			   QED_MSG_RDMA,
3088 			   "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_EXCEPTION_DETECTED fw_ret_code=%d\n",
3089 			   ep->cid, fw_return_code);
3090 		qed_iwarp_exception_received(p_hwfn, ep, fw_return_code);
3091 		break;
3092 	case IWARP_EVENT_TYPE_ASYNC_QP_IN_ERROR_STATE:
3093 		/* Async completion for Close Connection ramrod */
3094 		if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3095 			return -EINVAL;
3096 		DP_VERBOSE(p_hwfn,
3097 			   QED_MSG_RDMA,
3098 			   "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_QP_IN_ERROR_STATE fw_ret_code=%d\n",
3099 			   ep->cid, fw_return_code);
3100 		qed_iwarp_qp_in_error(p_hwfn, ep, fw_return_code);
3101 		break;
3102 	case IWARP_EVENT_TYPE_ASYNC_ENHANCED_MPA_REPLY_ARRIVED:
3103 		/* Async event for active side only */
3104 		if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3105 			return -EINVAL;
3106 		DP_VERBOSE(p_hwfn,
3107 			   QED_MSG_RDMA,
3108 			   "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_MPA_REPLY_ARRIVED fw_ret_code=%d\n",
3109 			   ep->cid, fw_return_code);
3110 		qed_iwarp_mpa_reply_arrived(p_hwfn, ep);
3111 		break;
3112 	case IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_COMPLETE:
3113 		if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3114 			return -EINVAL;
3115 		DP_VERBOSE(p_hwfn,
3116 			   QED_MSG_RDMA,
3117 			   "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_COMPLETE fw_ret_code=%d\n",
3118 			   ep->cid, fw_return_code);
3119 		qed_iwarp_mpa_complete(p_hwfn, ep, fw_return_code);
3120 		break;
3121 	case IWARP_EVENT_TYPE_ASYNC_CID_CLEANED:
3122 		cid = (u16)le32_to_cpu(fw_handle->lo);
3123 		DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
3124 			   "(0x%x)IWARP_EVENT_TYPE_ASYNC_CID_CLEANED\n", cid);
3125 		qed_iwarp_cid_cleaned(p_hwfn, cid);
3126 
3127 		break;
3128 	case IWARP_EVENT_TYPE_ASYNC_SRQ_EMPTY:
3129 		DP_NOTICE(p_hwfn, "IWARP_EVENT_TYPE_ASYNC_SRQ_EMPTY\n");
3130 		srq_offset = p_hwfn->p_rdma_info->srq_id_offset;
3131 		/* FW assigns value that is no greater than u16 */
3132 		srq_id = ((u16)le32_to_cpu(fw_handle->lo)) - srq_offset;
3133 		events.affiliated_event(events.context,
3134 					QED_IWARP_EVENT_SRQ_EMPTY,
3135 					&srq_id);
3136 		break;
3137 	case IWARP_EVENT_TYPE_ASYNC_SRQ_LIMIT:
3138 		DP_NOTICE(p_hwfn, "IWARP_EVENT_TYPE_ASYNC_SRQ_LIMIT\n");
3139 		srq_offset = p_hwfn->p_rdma_info->srq_id_offset;
3140 		/* FW assigns value that is no greater than u16 */
3141 		srq_id = ((u16)le32_to_cpu(fw_handle->lo)) - srq_offset;
3142 		events.affiliated_event(events.context,
3143 					QED_IWARP_EVENT_SRQ_LIMIT,
3144 					&srq_id);
3145 		break;
3146 	case IWARP_EVENT_TYPE_ASYNC_CQ_OVERFLOW:
3147 		DP_NOTICE(p_hwfn, "IWARP_EVENT_TYPE_ASYNC_CQ_OVERFLOW\n");
3148 
3149 		p_hwfn->p_rdma_info->events.affiliated_event(
3150 			p_hwfn->p_rdma_info->events.context,
3151 			QED_IWARP_EVENT_CQ_OVERFLOW,
3152 			(void *)fw_handle);
3153 		break;
3154 	default:
3155 		DP_ERR(p_hwfn, "Received unexpected async iwarp event %d\n",
3156 		       fw_event_code);
3157 		return -EINVAL;
3158 	}
3159 	return 0;
3160 }
3161 
3162 int
3163 qed_iwarp_create_listen(void *rdma_cxt,
3164 			struct qed_iwarp_listen_in *iparams,
3165 			struct qed_iwarp_listen_out *oparams)
3166 {
3167 	struct qed_hwfn *p_hwfn = rdma_cxt;
3168 	struct qed_iwarp_listener *listener;
3169 
3170 	listener = kzalloc(sizeof(*listener), GFP_KERNEL);
3171 	if (!listener)
3172 		return -ENOMEM;
3173 
3174 	listener->ip_version = iparams->ip_version;
3175 	memcpy(listener->ip_addr, iparams->ip_addr, sizeof(listener->ip_addr));
3176 	listener->port = iparams->port;
3177 	listener->vlan = iparams->vlan;
3178 
3179 	listener->event_cb = iparams->event_cb;
3180 	listener->cb_context = iparams->cb_context;
3181 	listener->max_backlog = iparams->max_backlog;
3182 	oparams->handle = listener;
3183 
3184 	spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3185 	list_add_tail(&listener->list_entry,
3186 		      &p_hwfn->p_rdma_info->iwarp.listen_list);
3187 	spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3188 
3189 	DP_VERBOSE(p_hwfn,
3190 		   QED_MSG_RDMA,
3191 		   "callback=%p handle=%p ip=%x:%x:%x:%x port=0x%x vlan=0x%x\n",
3192 		   listener->event_cb,
3193 		   listener,
3194 		   listener->ip_addr[0],
3195 		   listener->ip_addr[1],
3196 		   listener->ip_addr[2],
3197 		   listener->ip_addr[3], listener->port, listener->vlan);
3198 
3199 	return 0;
3200 }
3201 
3202 int qed_iwarp_destroy_listen(void *rdma_cxt, void *handle)
3203 {
3204 	struct qed_iwarp_listener *listener = handle;
3205 	struct qed_hwfn *p_hwfn = rdma_cxt;
3206 
3207 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "handle=%p\n", handle);
3208 
3209 	spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3210 	list_del(&listener->list_entry);
3211 	spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3212 
3213 	kfree(listener);
3214 
3215 	return 0;
3216 }
3217 
3218 int qed_iwarp_send_rtr(void *rdma_cxt, struct qed_iwarp_send_rtr_in *iparams)
3219 {
3220 	struct qed_hwfn *p_hwfn = rdma_cxt;
3221 	struct qed_sp_init_data init_data;
3222 	struct qed_spq_entry *p_ent;
3223 	struct qed_iwarp_ep *ep;
3224 	struct qed_rdma_qp *qp;
3225 	int rc;
3226 
3227 	ep = iparams->ep_context;
3228 	if (!ep) {
3229 		DP_ERR(p_hwfn, "Ep Context receive in send_rtr is NULL\n");
3230 		return -EINVAL;
3231 	}
3232 
3233 	qp = ep->qp;
3234 
3235 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x)\n",
3236 		   qp->icid, ep->tcp_cid);
3237 
3238 	memset(&init_data, 0, sizeof(init_data));
3239 	init_data.cid = qp->icid;
3240 	init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
3241 	init_data.comp_mode = QED_SPQ_MODE_CB;
3242 
3243 	rc = qed_sp_init_request(p_hwfn, &p_ent,
3244 				 IWARP_RAMROD_CMD_ID_MPA_OFFLOAD_SEND_RTR,
3245 				 PROTOCOLID_IWARP, &init_data);
3246 
3247 	if (rc)
3248 		return rc;
3249 
3250 	rc = qed_spq_post(p_hwfn, p_ent, NULL);
3251 
3252 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "rc = 0x%x\n", rc);
3253 
3254 	return rc;
3255 }
3256 
3257 void
3258 qed_iwarp_query_qp(struct qed_rdma_qp *qp,
3259 		   struct qed_rdma_query_qp_out_params *out_params)
3260 {
3261 	out_params->state = qed_iwarp2roce_state(qp->iwarp_state);
3262 }
3263