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 */
qed_iwarp_init_devinfo(struct qed_hwfn * p_hwfn)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
qed_iwarp_init_hw(struct qed_hwfn * p_hwfn,struct qed_ptt * p_ptt)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 */
qed_iwarp_cid_cleaned(struct qed_hwfn * p_hwfn,u32 cid)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
qed_iwarp_init_fw_ramrod(struct qed_hwfn * p_hwfn,struct iwarp_init_func_ramrod_data * p_ramrod)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
qed_iwarp_alloc_cid(struct qed_hwfn * p_hwfn,u32 * cid)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
qed_iwarp_set_tcp_cid(struct qed_hwfn * p_hwfn,u32 cid)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 */
qed_iwarp_alloc_tcp_cid(struct qed_hwfn * p_hwfn,u32 * cid)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
qed_iwarp_create_qp(struct qed_hwfn * p_hwfn,struct qed_rdma_qp * qp,struct qed_rdma_create_qp_out_params * out_params)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
qed_iwarp_modify_fw(struct qed_hwfn * p_hwfn,struct qed_rdma_qp * qp)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
qed_roce2iwarp_state(enum qed_roce_qp_state state)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
qed_iwarp2roce_state(enum qed_iwarp_qp_state 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
qed_iwarp_modify_qp(struct qed_hwfn * p_hwfn,struct qed_rdma_qp * qp,enum qed_iwarp_qp_state new_state,bool internal)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
qed_iwarp_fw_destroy(struct qed_hwfn * p_hwfn,struct qed_rdma_qp * qp)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
qed_iwarp_destroy_ep(struct qed_hwfn * p_hwfn,struct qed_iwarp_ep * ep,bool remove_from_active_list)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
qed_iwarp_destroy_qp(struct qed_hwfn * p_hwfn,struct qed_rdma_qp * qp)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
qed_iwarp_create_ep(struct qed_hwfn * p_hwfn,struct qed_iwarp_ep ** ep_out)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
qed_iwarp_print_tcp_ramrod(struct qed_hwfn * p_hwfn,struct iwarp_tcp_offload_ramrod_data * p_tcp_ramrod)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
qed_iwarp_tcp_offload(struct qed_hwfn * p_hwfn,struct qed_iwarp_ep * ep)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
qed_iwarp_mpa_received(struct qed_hwfn * p_hwfn,struct qed_iwarp_ep * ep)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, ¶ms);
816 }
817
818 static int
qed_iwarp_mpa_offload(struct qed_hwfn * p_hwfn,struct qed_iwarp_ep * ep)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
qed_iwarp_return_ep(struct qed_hwfn * p_hwfn,struct qed_iwarp_ep * ep)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
qed_iwarp_parse_private_data(struct qed_hwfn * p_hwfn,struct qed_iwarp_ep * ep)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
qed_iwarp_mpa_reply_arrived(struct qed_hwfn * p_hwfn,struct qed_iwarp_ep * ep)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, ¶ms);
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
qed_iwarp_mpa_complete(struct qed_hwfn * p_hwfn,struct qed_iwarp_ep * ep,u8 fw_return_code)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, ¶ms);
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
qed_iwarp_mpa_v2_set_private(struct qed_hwfn * p_hwfn,struct qed_iwarp_ep * ep,u8 * mpa_data_size)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
qed_iwarp_connect(void * rdma_cxt,struct qed_iwarp_connect_in * iparams,struct qed_iwarp_connect_out * oparams)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
qed_iwarp_get_free_ep(struct qed_hwfn * p_hwfn)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
qed_iwarp_wait_cid_map_cleared(struct qed_hwfn * p_hwfn,struct qed_bmap * bmap)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
qed_iwarp_wait_for_all_cids(struct qed_hwfn * p_hwfn)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
qed_iwarp_free_prealloc_ep(struct qed_hwfn * p_hwfn)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
qed_iwarp_prealloc_ep(struct qed_hwfn * p_hwfn,bool init)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
qed_iwarp_alloc(struct qed_hwfn * p_hwfn)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
qed_iwarp_resc_free(struct qed_hwfn * p_hwfn)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
qed_iwarp_accept(void * rdma_cxt,struct qed_iwarp_accept_in * iparams)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
qed_iwarp_reject(void * rdma_cxt,struct qed_iwarp_reject_in * iparams)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
qed_iwarp_print_cm_info(struct qed_hwfn * p_hwfn,struct qed_iwarp_cm_info * cm_info)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
qed_iwarp_ll2_post_rx(struct qed_hwfn * p_hwfn,struct qed_iwarp_ll2_buff * buf,u8 handle)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
qed_iwarp_ep_exists(struct qed_hwfn * p_hwfn,struct qed_iwarp_cm_info * cm_info)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 *
qed_iwarp_get_listener(struct qed_hwfn * p_hwfn,struct qed_iwarp_cm_info * cm_info)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
qed_iwarp_parse_rx_pkt(struct qed_hwfn * p_hwfn,struct qed_iwarp_cm_info * cm_info,void * buf,u8 * remote_mac_addr,u8 * local_mac_addr,int * payload_len,int * tcp_start_offset)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
qed_iwarp_get_curr_fpdu(struct qed_hwfn * p_hwfn,u16 cid)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
qed_iwarp_mpa_classify(struct qed_hwfn * p_hwfn,struct qed_iwarp_fpdu * fpdu,u16 tcp_payload_len,u8 * mpa_data)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
qed_iwarp_init_fpdu(struct qed_iwarp_ll2_buff * buf,struct qed_iwarp_fpdu * fpdu,struct unaligned_opaque_data * pkt_data,u16 tcp_payload_size,u8 placement_offset)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
qed_iwarp_cp_pkt(struct qed_hwfn * p_hwfn,struct qed_iwarp_fpdu * fpdu,struct unaligned_opaque_data * pkt_data,struct qed_iwarp_ll2_buff * buf,u16 tcp_payload_size)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
qed_iwarp_update_fpdu_length(struct qed_hwfn * p_hwfn,struct qed_iwarp_fpdu * fpdu,u8 * mpa_data)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
qed_iwarp_recycle_pkt(struct qed_hwfn * p_hwfn,struct qed_iwarp_fpdu * fpdu,struct qed_iwarp_ll2_buff * buf)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
qed_iwarp_win_right_edge(struct qed_hwfn * p_hwfn,struct qed_iwarp_fpdu * fpdu)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
qed_iwarp_send_fpdu(struct qed_hwfn * p_hwfn,struct qed_iwarp_fpdu * fpdu,struct unaligned_opaque_data * curr_pkt,struct qed_iwarp_ll2_buff * buf,u16 tcp_payload_size,enum qed_iwarp_mpa_pkt_type pkt_type)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
qed_iwarp_mpa_get_data(struct qed_hwfn * p_hwfn,struct unaligned_opaque_data * curr_pkt,u32 opaque_data0,u32 opaque_data1)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
qed_iwarp_process_mpa_pkt(struct qed_hwfn * p_hwfn,struct qed_iwarp_ll2_mpa_buf * mpa_buf)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
qed_iwarp_process_pending_pkts(struct qed_hwfn * p_hwfn)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
qed_iwarp_ll2_comp_mpa_pkt(void * cxt,struct qed_ll2_comp_rx_data * data)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
qed_iwarp_ll2_comp_syn_pkt(void * cxt,struct qed_ll2_comp_rx_data * data)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
qed_iwarp_ll2_rel_rx_pkt(void * cxt,u8 connection_handle,void * cookie,dma_addr_t rx_buf_addr,bool b_last_packet)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
qed_iwarp_ll2_comp_tx_pkt(void * cxt,u8 connection_handle,void * cookie,dma_addr_t first_frag_addr,bool b_last_fragment,bool b_last_packet)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
qed_iwarp_ll2_rel_tx_pkt(void * cxt,u8 connection_handle,void * cookie,dma_addr_t first_frag_addr,bool b_last_fragment,bool b_last_packet)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
qed_iwarp_ll2_slowpath(void * cxt,u8 connection_handle,u32 opaque_data_0,u32 opaque_data_1)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
qed_iwarp_ll2_stop(struct qed_hwfn * p_hwfn)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
qed_iwarp_ll2_alloc_buffers(struct qed_hwfn * p_hwfn,int num_rx_bufs,int buff_size,u8 ll2_handle)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
qed_iwarp_ll2_start(struct qed_hwfn * p_hwfn,struct qed_rdma_start_in_params * params,u32 rcv_wnd_size)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
qed_iwarp_setup(struct qed_hwfn * p_hwfn,struct qed_rdma_start_in_params * params)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
qed_iwarp_stop(struct qed_hwfn * p_hwfn)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
qed_iwarp_qp_in_error(struct qed_hwfn * p_hwfn,struct qed_iwarp_ep * ep,u8 fw_return_code)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, ¶ms);
2886 }
2887
qed_iwarp_exception_received(struct qed_hwfn * p_hwfn,struct qed_iwarp_ep * ep,int fw_ret_code)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, ¶ms);
2956 }
2957 }
2958
2959 static void
qed_iwarp_tcp_connect_unsuccessful(struct qed_hwfn * p_hwfn,struct qed_iwarp_ep * ep,u8 fw_return_code)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(¶ms, 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, ¶ms);
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
qed_iwarp_connect_complete(struct qed_hwfn * p_hwfn,struct qed_iwarp_ep * ep,u8 fw_return_code)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
qed_iwarp_check_ep_ok(struct qed_hwfn * p_hwfn,struct qed_iwarp_ep * ep)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
qed_iwarp_async_event(struct qed_hwfn * p_hwfn,u8 fw_event_code,__le16 echo,union event_ring_data * data,u8 fw_return_code)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
qed_iwarp_create_listen(void * rdma_cxt,struct qed_iwarp_listen_in * iparams,struct qed_iwarp_listen_out * oparams)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
qed_iwarp_destroy_listen(void * rdma_cxt,void * handle)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
qed_iwarp_send_rtr(void * rdma_cxt,struct qed_iwarp_send_rtr_in * iparams)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
qed_iwarp_query_qp(struct qed_rdma_qp * qp,struct qed_rdma_query_qp_out_params * out_params)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