Commit | Line | Data |
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77241056 MM |
1 | /* |
2 | * | |
3 | * This file is provided under a dual BSD/GPLv2 license. When using or | |
4 | * redistributing this file, you may do so under either license. | |
5 | * | |
6 | * GPL LICENSE SUMMARY | |
7 | * | |
8 | * Copyright(c) 2015 Intel Corporation. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of version 2 of the GNU General Public License as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * BSD LICENSE | |
20 | * | |
21 | * Copyright(c) 2015 Intel Corporation. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * | |
27 | * - Redistributions of source code must retain the above copyright | |
28 | * notice, this list of conditions and the following disclaimer. | |
29 | * - Redistributions in binary form must reproduce the above copyright | |
30 | * notice, this list of conditions and the following disclaimer in | |
31 | * the documentation and/or other materials provided with the | |
32 | * distribution. | |
33 | * - Neither the name of Intel Corporation nor the names of its | |
34 | * contributors may be used to endorse or promote products derived | |
35 | * from this software without specific prior written permission. | |
36 | * | |
37 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
38 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
39 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
40 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
41 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
42 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
43 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
44 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
45 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
46 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
47 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
48 | * | |
49 | */ | |
50 | ||
51 | #include <linux/net.h> | |
52 | #include <rdma/ib_smi.h> | |
53 | ||
54 | #include "hfi.h" | |
55 | #include "mad.h" | |
56 | #include "qp.h" | |
57 | ||
58 | /** | |
59 | * ud_loopback - handle send on loopback QPs | |
60 | * @sqp: the sending QP | |
61 | * @swqe: the send work request | |
62 | * | |
63 | * This is called from hfi1_make_ud_req() to forward a WQE addressed | |
64 | * to the same HFI. | |
65 | * Note that the receive interrupt handler may be calling hfi1_ud_rcv() | |
66 | * while this is being called. | |
67 | */ | |
895420dd | 68 | static void ud_loopback(struct rvt_qp *sqp, struct rvt_swqe *swqe) |
77241056 MM |
69 | { |
70 | struct hfi1_ibport *ibp = to_iport(sqp->ibqp.device, sqp->port_num); | |
71 | struct hfi1_pportdata *ppd; | |
895420dd | 72 | struct rvt_qp *qp; |
77241056 MM |
73 | struct ib_ah_attr *ah_attr; |
74 | unsigned long flags; | |
895420dd DD |
75 | struct rvt_sge_state ssge; |
76 | struct rvt_sge *sge; | |
77241056 MM |
77 | struct ib_wc wc; |
78 | u32 length; | |
79 | enum ib_qp_type sqptype, dqptype; | |
80 | ||
81 | rcu_read_lock(); | |
82 | ||
ec4274f1 DD |
83 | qp = rvt_lookup_qpn(ib_to_rvt(sqp->ibqp.device), &ibp->rvp, |
84 | swqe->ud_wr.remote_qpn); | |
77241056 | 85 | if (!qp) { |
4eb06882 | 86 | ibp->rvp.n_pkt_drops++; |
77241056 MM |
87 | rcu_read_unlock(); |
88 | return; | |
89 | } | |
90 | ||
91 | sqptype = sqp->ibqp.qp_type == IB_QPT_GSI ? | |
92 | IB_QPT_UD : sqp->ibqp.qp_type; | |
93 | dqptype = qp->ibqp.qp_type == IB_QPT_GSI ? | |
94 | IB_QPT_UD : qp->ibqp.qp_type; | |
95 | ||
96 | if (dqptype != sqptype || | |
83693bd1 | 97 | !(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK)) { |
4eb06882 | 98 | ibp->rvp.n_pkt_drops++; |
77241056 MM |
99 | goto drop; |
100 | } | |
101 | ||
15723f06 | 102 | ah_attr = &ibah_to_rvtah(swqe->ud_wr.ah)->attr; |
77241056 MM |
103 | ppd = ppd_from_ibp(ibp); |
104 | ||
105 | if (qp->ibqp.qp_num > 1) { | |
106 | u16 pkey; | |
107 | u16 slid; | |
108 | u8 sc5 = ibp->sl_to_sc[ah_attr->sl]; | |
109 | ||
110 | pkey = hfi1_get_pkey(ibp, sqp->s_pkey_index); | |
111 | slid = ppd->lid | (ah_attr->src_path_bits & | |
112 | ((1 << ppd->lmc) - 1)); | |
113 | if (unlikely(ingress_pkey_check(ppd, pkey, sc5, | |
114 | qp->s_pkey_index, slid))) { | |
5cd24119 | 115 | hfi1_bad_pqkey(ibp, OPA_TRAP_BAD_P_KEY, pkey, |
77241056 MM |
116 | ah_attr->sl, |
117 | sqp->ibqp.qp_num, qp->ibqp.qp_num, | |
5cd24119 | 118 | slid, ah_attr->dlid); |
77241056 MM |
119 | goto drop; |
120 | } | |
121 | } | |
122 | ||
123 | /* | |
124 | * Check that the qkey matches (except for QP0, see 9.6.1.4.1). | |
125 | * Qkeys with the high order bit set mean use the | |
126 | * qkey from the QP context instead of the WR (see 10.2.5). | |
127 | */ | |
128 | if (qp->ibqp.qp_num) { | |
129 | u32 qkey; | |
130 | ||
e622f2f4 CH |
131 | qkey = (int)swqe->ud_wr.remote_qkey < 0 ? |
132 | sqp->qkey : swqe->ud_wr.remote_qkey; | |
77241056 MM |
133 | if (unlikely(qkey != qp->qkey)) { |
134 | u16 lid; | |
135 | ||
136 | lid = ppd->lid | (ah_attr->src_path_bits & | |
137 | ((1 << ppd->lmc) - 1)); | |
5cd24119 | 138 | hfi1_bad_pqkey(ibp, OPA_TRAP_BAD_Q_KEY, qkey, |
77241056 MM |
139 | ah_attr->sl, |
140 | sqp->ibqp.qp_num, qp->ibqp.qp_num, | |
5cd24119 EK |
141 | lid, |
142 | ah_attr->dlid); | |
77241056 MM |
143 | goto drop; |
144 | } | |
145 | } | |
146 | ||
147 | /* | |
148 | * A GRH is expected to precede the data even if not | |
149 | * present on the wire. | |
150 | */ | |
151 | length = swqe->length; | |
152 | memset(&wc, 0, sizeof(wc)); | |
153 | wc.byte_len = length + sizeof(struct ib_grh); | |
154 | ||
155 | if (swqe->wr.opcode == IB_WR_SEND_WITH_IMM) { | |
156 | wc.wc_flags = IB_WC_WITH_IMM; | |
157 | wc.ex.imm_data = swqe->wr.ex.imm_data; | |
158 | } | |
159 | ||
160 | spin_lock_irqsave(&qp->r_lock, flags); | |
161 | ||
162 | /* | |
163 | * Get the next work request entry to find where to put the data. | |
164 | */ | |
54d10c1e DD |
165 | if (qp->r_flags & RVT_R_REUSE_SGE) |
166 | qp->r_flags &= ~RVT_R_REUSE_SGE; | |
77241056 MM |
167 | else { |
168 | int ret; | |
169 | ||
ec4274f1 | 170 | ret = hfi1_rvt_get_rwqe(qp, 0); |
77241056 MM |
171 | if (ret < 0) { |
172 | hfi1_rc_error(qp, IB_WC_LOC_QP_OP_ERR); | |
173 | goto bail_unlock; | |
174 | } | |
175 | if (!ret) { | |
176 | if (qp->ibqp.qp_num == 0) | |
4eb06882 | 177 | ibp->rvp.n_vl15_dropped++; |
77241056 MM |
178 | goto bail_unlock; |
179 | } | |
180 | } | |
181 | /* Silently drop packets which are too big. */ | |
182 | if (unlikely(wc.byte_len > qp->r_len)) { | |
54d10c1e | 183 | qp->r_flags |= RVT_R_REUSE_SGE; |
4eb06882 | 184 | ibp->rvp.n_pkt_drops++; |
77241056 MM |
185 | goto bail_unlock; |
186 | } | |
187 | ||
188 | if (ah_attr->ah_flags & IB_AH_GRH) { | |
189 | hfi1_copy_sge(&qp->r_sge, &ah_attr->grh, | |
7b0b01aa | 190 | sizeof(struct ib_grh), 1, 0); |
77241056 MM |
191 | wc.wc_flags |= IB_WC_GRH; |
192 | } else | |
193 | hfi1_skip_sge(&qp->r_sge, sizeof(struct ib_grh), 1); | |
194 | ssge.sg_list = swqe->sg_list + 1; | |
195 | ssge.sge = *swqe->sg_list; | |
196 | ssge.num_sge = swqe->wr.num_sge; | |
197 | sge = &ssge.sge; | |
198 | while (length) { | |
199 | u32 len = sge->length; | |
200 | ||
201 | if (len > length) | |
202 | len = length; | |
203 | if (len > sge->sge_length) | |
204 | len = sge->sge_length; | |
205 | WARN_ON_ONCE(len == 0); | |
7b0b01aa | 206 | hfi1_copy_sge(&qp->r_sge, sge->vaddr, len, 1, 0); |
77241056 MM |
207 | sge->vaddr += len; |
208 | sge->length -= len; | |
209 | sge->sge_length -= len; | |
210 | if (sge->sge_length == 0) { | |
211 | if (--ssge.num_sge) | |
212 | *sge = *ssge.sg_list++; | |
213 | } else if (sge->length == 0 && sge->mr->lkey) { | |
cd4ceee3 | 214 | if (++sge->n >= RVT_SEGSZ) { |
77241056 MM |
215 | if (++sge->m >= sge->mr->mapsz) |
216 | break; | |
217 | sge->n = 0; | |
218 | } | |
219 | sge->vaddr = | |
220 | sge->mr->map[sge->m]->segs[sge->n].vaddr; | |
221 | sge->length = | |
222 | sge->mr->map[sge->m]->segs[sge->n].length; | |
223 | } | |
224 | length -= len; | |
225 | } | |
ec4274f1 | 226 | rvt_put_ss(&qp->r_sge); |
54d10c1e | 227 | if (!test_and_clear_bit(RVT_R_WRID_VALID, &qp->r_aflags)) |
77241056 MM |
228 | goto bail_unlock; |
229 | wc.wr_id = qp->r_wr_id; | |
230 | wc.status = IB_WC_SUCCESS; | |
231 | wc.opcode = IB_WC_RECV; | |
232 | wc.qp = &qp->ibqp; | |
233 | wc.src_qp = sqp->ibqp.qp_num; | |
234 | if (qp->ibqp.qp_type == IB_QPT_GSI || qp->ibqp.qp_type == IB_QPT_SMI) { | |
235 | if (sqp->ibqp.qp_type == IB_QPT_GSI || | |
236 | sqp->ibqp.qp_type == IB_QPT_SMI) | |
e622f2f4 | 237 | wc.pkey_index = swqe->ud_wr.pkey_index; |
77241056 MM |
238 | else |
239 | wc.pkey_index = sqp->s_pkey_index; | |
240 | } else { | |
241 | wc.pkey_index = 0; | |
242 | } | |
243 | wc.slid = ppd->lid | (ah_attr->src_path_bits & ((1 << ppd->lmc) - 1)); | |
244 | /* Check for loopback when the port lid is not set */ | |
245 | if (wc.slid == 0 && sqp->ibqp.qp_type == IB_QPT_GSI) | |
8859b4a6 | 246 | wc.slid = be16_to_cpu(IB_LID_PERMISSIVE); |
77241056 MM |
247 | wc.sl = ah_attr->sl; |
248 | wc.dlid_path_bits = ah_attr->dlid & ((1 << ppd->lmc) - 1); | |
249 | wc.port_num = qp->port_num; | |
250 | /* Signal completion event if the solicited bit is set. */ | |
abd712da DD |
251 | rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, |
252 | swqe->wr.send_flags & IB_SEND_SOLICITED); | |
4eb06882 | 253 | ibp->rvp.n_loop_pkts++; |
77241056 MM |
254 | bail_unlock: |
255 | spin_unlock_irqrestore(&qp->r_lock, flags); | |
256 | drop: | |
257 | rcu_read_unlock(); | |
258 | } | |
259 | ||
260 | /** | |
261 | * hfi1_make_ud_req - construct a UD request packet | |
262 | * @qp: the QP | |
263 | * | |
46a80d62 MM |
264 | * Assume s_lock is held. |
265 | * | |
77241056 MM |
266 | * Return 1 if constructed; otherwise, return 0. |
267 | */ | |
895420dd | 268 | int hfi1_make_ud_req(struct rvt_qp *qp) |
77241056 | 269 | { |
4c6829c5 | 270 | struct hfi1_qp_priv *priv = qp->priv; |
77241056 MM |
271 | struct hfi1_other_headers *ohdr; |
272 | struct ib_ah_attr *ah_attr; | |
273 | struct hfi1_pportdata *ppd; | |
274 | struct hfi1_ibport *ibp; | |
895420dd | 275 | struct rvt_swqe *wqe; |
77241056 MM |
276 | u32 nwords; |
277 | u32 extra_bytes; | |
278 | u32 bth0; | |
279 | u16 lrh0; | |
280 | u16 lid; | |
281 | int ret = 0; | |
282 | int next_cur; | |
283 | u8 sc5; | |
284 | ||
83693bd1 DD |
285 | if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_NEXT_SEND_OK)) { |
286 | if (!(ib_rvt_state_ops[qp->state] & RVT_FLUSH_SEND)) | |
77241056 MM |
287 | goto bail; |
288 | /* We are in the error state, flush the work request. */ | |
46a80d62 MM |
289 | smp_read_barrier_depends(); /* see post_one_send */ |
290 | if (qp->s_last == ACCESS_ONCE(qp->s_head)) | |
77241056 MM |
291 | goto bail; |
292 | /* If DMAs are in progress, we can't flush immediately. */ | |
4c6829c5 | 293 | if (atomic_read(&priv->s_iowait.sdma_busy)) { |
54d10c1e | 294 | qp->s_flags |= RVT_S_WAIT_DMA; |
77241056 MM |
295 | goto bail; |
296 | } | |
83693bd1 | 297 | wqe = rvt_get_swqe_ptr(qp, qp->s_last); |
77241056 MM |
298 | hfi1_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR); |
299 | goto done; | |
300 | } | |
301 | ||
46a80d62 MM |
302 | /* see post_one_send() */ |
303 | smp_read_barrier_depends(); | |
304 | if (qp->s_cur == ACCESS_ONCE(qp->s_head)) | |
77241056 MM |
305 | goto bail; |
306 | ||
83693bd1 | 307 | wqe = rvt_get_swqe_ptr(qp, qp->s_cur); |
77241056 MM |
308 | next_cur = qp->s_cur + 1; |
309 | if (next_cur >= qp->s_size) | |
310 | next_cur = 0; | |
311 | ||
312 | /* Construct the header. */ | |
313 | ibp = to_iport(qp->ibqp.device, qp->port_num); | |
314 | ppd = ppd_from_ibp(ibp); | |
15723f06 | 315 | ah_attr = &ibah_to_rvtah(wqe->ud_wr.ah)->attr; |
8859b4a6 DD |
316 | if (ah_attr->dlid < be16_to_cpu(IB_MULTICAST_LID_BASE) || |
317 | ah_attr->dlid == be16_to_cpu(IB_LID_PERMISSIVE)) { | |
77241056 MM |
318 | lid = ah_attr->dlid & ~((1 << ppd->lmc) - 1); |
319 | if (unlikely(!loopback && (lid == ppd->lid || | |
8859b4a6 | 320 | (lid == be16_to_cpu(IB_LID_PERMISSIVE) && |
77241056 | 321 | qp->ibqp.qp_type == IB_QPT_GSI)))) { |
46a80d62 | 322 | unsigned long flags; |
77241056 MM |
323 | /* |
324 | * If DMAs are in progress, we can't generate | |
325 | * a completion for the loopback packet since | |
326 | * it would be out of order. | |
327 | * Instead of waiting, we could queue a | |
328 | * zero length descriptor so we get a callback. | |
329 | */ | |
4c6829c5 | 330 | if (atomic_read(&priv->s_iowait.sdma_busy)) { |
54d10c1e | 331 | qp->s_flags |= RVT_S_WAIT_DMA; |
77241056 MM |
332 | goto bail; |
333 | } | |
334 | qp->s_cur = next_cur; | |
46a80d62 | 335 | local_irq_save(flags); |
77241056 MM |
336 | spin_unlock_irqrestore(&qp->s_lock, flags); |
337 | ud_loopback(qp, wqe); | |
338 | spin_lock_irqsave(&qp->s_lock, flags); | |
339 | hfi1_send_complete(qp, wqe, IB_WC_SUCCESS); | |
340 | goto done; | |
341 | } | |
342 | } | |
343 | ||
344 | qp->s_cur = next_cur; | |
345 | extra_bytes = -wqe->length & 3; | |
346 | nwords = (wqe->length + extra_bytes) >> 2; | |
347 | ||
348 | /* header size in 32-bit words LRH+BTH+DETH = (8+12+8)/4. */ | |
349 | qp->s_hdrwords = 7; | |
350 | qp->s_cur_size = wqe->length; | |
351 | qp->s_cur_sge = &qp->s_sge; | |
352 | qp->s_srate = ah_attr->static_rate; | |
353 | qp->srate_mbps = ib_rate_to_mbps(qp->s_srate); | |
354 | qp->s_wqe = wqe; | |
355 | qp->s_sge.sge = wqe->sg_list[0]; | |
356 | qp->s_sge.sg_list = wqe->sg_list + 1; | |
357 | qp->s_sge.num_sge = wqe->wr.num_sge; | |
358 | qp->s_sge.total_len = wqe->length; | |
359 | ||
360 | if (ah_attr->ah_flags & IB_AH_GRH) { | |
361 | /* Header size in 32-bit words. */ | |
4c6829c5 | 362 | qp->s_hdrwords += hfi1_make_grh(ibp, &priv->s_hdr->ibh.u.l.grh, |
77241056 MM |
363 | &ah_attr->grh, |
364 | qp->s_hdrwords, nwords); | |
365 | lrh0 = HFI1_LRH_GRH; | |
4c6829c5 | 366 | ohdr = &priv->s_hdr->ibh.u.l.oth; |
77241056 MM |
367 | /* |
368 | * Don't worry about sending to locally attached multicast | |
369 | * QPs. It is unspecified by the spec. what happens. | |
370 | */ | |
371 | } else { | |
372 | /* Header size in 32-bit words. */ | |
373 | lrh0 = HFI1_LRH_BTH; | |
4c6829c5 | 374 | ohdr = &priv->s_hdr->ibh.u.oth; |
77241056 MM |
375 | } |
376 | if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM) { | |
377 | qp->s_hdrwords++; | |
378 | ohdr->u.ud.imm_data = wqe->wr.ex.imm_data; | |
379 | bth0 = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE << 24; | |
380 | } else | |
381 | bth0 = IB_OPCODE_UD_SEND_ONLY << 24; | |
382 | sc5 = ibp->sl_to_sc[ah_attr->sl]; | |
383 | lrh0 |= (ah_attr->sl & 0xf) << 4; | |
384 | if (qp->ibqp.qp_type == IB_QPT_SMI) { | |
385 | lrh0 |= 0xF000; /* Set VL (see ch. 13.5.3.1) */ | |
4c6829c5 | 386 | priv->s_sc = 0xf; |
77241056 MM |
387 | } else { |
388 | lrh0 |= (sc5 & 0xf) << 12; | |
4c6829c5 | 389 | priv->s_sc = sc5; |
77241056 | 390 | } |
4c6829c5 DD |
391 | priv->s_sde = qp_to_sdma_engine(qp, priv->s_sc); |
392 | priv->s_hdr->ibh.lrh[0] = cpu_to_be16(lrh0); | |
393 | priv->s_hdr->ibh.lrh[1] = cpu_to_be16(ah_attr->dlid); /* DEST LID */ | |
394 | priv->s_hdr->ibh.lrh[2] = | |
77241056 MM |
395 | cpu_to_be16(qp->s_hdrwords + nwords + SIZE_OF_CRC); |
396 | if (ah_attr->dlid == be16_to_cpu(IB_LID_PERMISSIVE)) | |
4c6829c5 | 397 | priv->s_hdr->ibh.lrh[3] = IB_LID_PERMISSIVE; |
77241056 MM |
398 | else { |
399 | lid = ppd->lid; | |
400 | if (lid) { | |
401 | lid |= ah_attr->src_path_bits & ((1 << ppd->lmc) - 1); | |
4c6829c5 | 402 | priv->s_hdr->ibh.lrh[3] = cpu_to_be16(lid); |
77241056 | 403 | } else |
4c6829c5 | 404 | priv->s_hdr->ibh.lrh[3] = IB_LID_PERMISSIVE; |
77241056 MM |
405 | } |
406 | if (wqe->wr.send_flags & IB_SEND_SOLICITED) | |
407 | bth0 |= IB_BTH_SOLICITED; | |
408 | bth0 |= extra_bytes << 20; | |
409 | if (qp->ibqp.qp_type == IB_QPT_GSI || qp->ibqp.qp_type == IB_QPT_SMI) | |
e622f2f4 | 410 | bth0 |= hfi1_get_pkey(ibp, wqe->ud_wr.pkey_index); |
77241056 MM |
411 | else |
412 | bth0 |= hfi1_get_pkey(ibp, qp->s_pkey_index); | |
413 | ohdr->bth[0] = cpu_to_be32(bth0); | |
e622f2f4 | 414 | ohdr->bth[1] = cpu_to_be32(wqe->ud_wr.remote_qpn); |
46a80d62 | 415 | ohdr->bth[2] = cpu_to_be32(mask_psn(wqe->psn)); |
77241056 MM |
416 | /* |
417 | * Qkeys with the high order bit set mean use the | |
418 | * qkey from the QP context instead of the WR (see 10.2.5). | |
419 | */ | |
e622f2f4 CH |
420 | ohdr->u.ud.deth[0] = cpu_to_be32((int)wqe->ud_wr.remote_qkey < 0 ? |
421 | qp->qkey : wqe->ud_wr.remote_qkey); | |
77241056 MM |
422 | ohdr->u.ud.deth[1] = cpu_to_be32(qp->ibqp.qp_num); |
423 | /* disarm any ahg */ | |
4c6829c5 DD |
424 | priv->s_hdr->ahgcount = 0; |
425 | priv->s_hdr->ahgidx = 0; | |
426 | priv->s_hdr->tx_flags = 0; | |
427 | priv->s_hdr->sde = NULL; | |
77241056 MM |
428 | |
429 | done: | |
46a80d62 | 430 | return 1; |
77241056 | 431 | bail: |
54d10c1e | 432 | qp->s_flags &= ~RVT_S_BUSY; |
77241056 MM |
433 | return ret; |
434 | } | |
435 | ||
436 | /* | |
437 | * Hardware can't check this so we do it here. | |
438 | * | |
439 | * This is a slightly different algorithm than the standard pkey check. It | |
440 | * special cases the management keys and allows for 0x7fff and 0xffff to be in | |
441 | * the table at the same time. | |
442 | * | |
443 | * @returns the index found or -1 if not found | |
444 | */ | |
445 | int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey) | |
446 | { | |
447 | struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); | |
448 | unsigned i; | |
449 | ||
450 | if (pkey == FULL_MGMT_P_KEY || pkey == LIM_MGMT_P_KEY) { | |
451 | unsigned lim_idx = -1; | |
452 | ||
453 | for (i = 0; i < ARRAY_SIZE(ppd->pkeys); ++i) { | |
454 | /* here we look for an exact match */ | |
455 | if (ppd->pkeys[i] == pkey) | |
456 | return i; | |
457 | if (ppd->pkeys[i] == LIM_MGMT_P_KEY) | |
458 | lim_idx = i; | |
459 | } | |
460 | ||
461 | /* did not find 0xffff return 0x7fff idx if found */ | |
462 | if (pkey == FULL_MGMT_P_KEY) | |
463 | return lim_idx; | |
464 | ||
465 | /* no match... */ | |
466 | return -1; | |
467 | } | |
468 | ||
469 | pkey &= 0x7fff; /* remove limited/full membership bit */ | |
470 | ||
471 | for (i = 0; i < ARRAY_SIZE(ppd->pkeys); ++i) | |
472 | if ((ppd->pkeys[i] & 0x7fff) == pkey) | |
473 | return i; | |
474 | ||
475 | /* | |
476 | * Should not get here, this means hardware failed to validate pkeys. | |
477 | */ | |
478 | return -1; | |
479 | } | |
480 | ||
895420dd | 481 | void return_cnp(struct hfi1_ibport *ibp, struct rvt_qp *qp, u32 remote_qpn, |
77241056 MM |
482 | u32 pkey, u32 slid, u32 dlid, u8 sc5, |
483 | const struct ib_grh *old_grh) | |
484 | { | |
485 | u64 pbc, pbc_flags = 0; | |
486 | u32 bth0, plen, vl, hwords = 5; | |
487 | u16 lrh0; | |
488 | u8 sl = ibp->sc_to_sl[sc5]; | |
489 | struct hfi1_ib_header hdr; | |
490 | struct hfi1_other_headers *ohdr; | |
491 | struct pio_buf *pbuf; | |
492 | struct send_context *ctxt = qp_to_send_context(qp, sc5); | |
493 | struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); | |
494 | ||
495 | if (old_grh) { | |
496 | struct ib_grh *grh = &hdr.u.l.grh; | |
497 | ||
498 | grh->version_tclass_flow = old_grh->version_tclass_flow; | |
499 | grh->paylen = cpu_to_be16((hwords - 2 + SIZE_OF_CRC) << 2); | |
500 | grh->hop_limit = 0xff; | |
501 | grh->sgid = old_grh->dgid; | |
502 | grh->dgid = old_grh->sgid; | |
503 | ohdr = &hdr.u.l.oth; | |
504 | lrh0 = HFI1_LRH_GRH; | |
505 | hwords += sizeof(struct ib_grh) / sizeof(u32); | |
506 | } else { | |
507 | ohdr = &hdr.u.oth; | |
508 | lrh0 = HFI1_LRH_BTH; | |
509 | } | |
510 | ||
511 | lrh0 |= (sc5 & 0xf) << 12 | sl << 4; | |
512 | ||
513 | bth0 = pkey | (IB_OPCODE_CNP << 24); | |
514 | ohdr->bth[0] = cpu_to_be32(bth0); | |
515 | ||
516 | ohdr->bth[1] = cpu_to_be32(remote_qpn | (1 << HFI1_BECN_SHIFT)); | |
517 | ohdr->bth[2] = 0; /* PSN 0 */ | |
518 | ||
519 | hdr.lrh[0] = cpu_to_be16(lrh0); | |
520 | hdr.lrh[1] = cpu_to_be16(dlid); | |
521 | hdr.lrh[2] = cpu_to_be16(hwords + SIZE_OF_CRC); | |
522 | hdr.lrh[3] = cpu_to_be16(slid); | |
523 | ||
524 | plen = 2 /* PBC */ + hwords; | |
525 | pbc_flags |= (!!(sc5 & 0x10)) << PBC_DC_INFO_SHIFT; | |
526 | vl = sc_to_vlt(ppd->dd, sc5); | |
527 | pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps, vl, plen); | |
528 | if (ctxt) { | |
529 | pbuf = sc_buffer_alloc(ctxt, plen, NULL, NULL); | |
530 | if (pbuf) | |
531 | ppd->dd->pio_inline_send(ppd->dd, pbuf, pbc, | |
532 | &hdr, hwords); | |
533 | } | |
534 | } | |
535 | ||
536 | /* | |
537 | * opa_smp_check() - Do the regular pkey checking, and the additional | |
538 | * checks for SMPs specified in OPAv1 rev 0.90, section 9.10.26 | |
539 | * ("SMA Packet Checks"). | |
540 | * | |
541 | * Note that: | |
542 | * - Checks are done using the pkey directly from the packet's BTH, | |
543 | * and specifically _not_ the pkey that we attach to the completion, | |
544 | * which may be different. | |
545 | * - These checks are specifically for "non-local" SMPs (i.e., SMPs | |
546 | * which originated on another node). SMPs which are sent from, and | |
547 | * destined to this node are checked in opa_local_smp_check(). | |
548 | * | |
549 | * At the point where opa_smp_check() is called, we know: | |
550 | * - destination QP is QP0 | |
551 | * | |
552 | * opa_smp_check() returns 0 if all checks succeed, 1 otherwise. | |
553 | */ | |
554 | static int opa_smp_check(struct hfi1_ibport *ibp, u16 pkey, u8 sc5, | |
895420dd | 555 | struct rvt_qp *qp, u16 slid, struct opa_smp *smp) |
77241056 MM |
556 | { |
557 | struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); | |
558 | ||
559 | /* | |
560 | * I don't think it's possible for us to get here with sc != 0xf, | |
561 | * but check it to be certain. | |
562 | */ | |
563 | if (sc5 != 0xf) | |
564 | return 1; | |
565 | ||
566 | if (rcv_pkey_check(ppd, pkey, sc5, slid)) | |
567 | return 1; | |
568 | ||
569 | /* | |
570 | * At this point we know (and so don't need to check again) that | |
571 | * the pkey is either LIM_MGMT_P_KEY, or FULL_MGMT_P_KEY | |
572 | * (see ingress_pkey_check). | |
573 | */ | |
574 | if (smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE && | |
575 | smp->mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED) { | |
576 | ingress_pkey_table_fail(ppd, pkey, slid); | |
577 | return 1; | |
578 | } | |
579 | ||
580 | /* | |
581 | * SMPs fall into one of four (disjoint) categories: | |
582 | * SMA request, SMA response, trap, or trap repress. | |
583 | * Our response depends, in part, on which type of | |
584 | * SMP we're processing. | |
585 | * | |
586 | * If this is not an SMA request, or trap repress: | |
587 | * - accept MAD if the port is running an SM | |
588 | * - pkey == FULL_MGMT_P_KEY => | |
589 | * reply with unsupported method (i.e., just mark | |
590 | * the smp's status field here, and let it be | |
591 | * processed normally) | |
592 | * - pkey != LIM_MGMT_P_KEY => | |
593 | * increment port recv constraint errors, drop MAD | |
594 | * If this is an SMA request or trap repress: | |
595 | * - pkey != FULL_MGMT_P_KEY => | |
596 | * increment port recv constraint errors, drop MAD | |
597 | */ | |
598 | switch (smp->method) { | |
599 | case IB_MGMT_METHOD_GET: | |
600 | case IB_MGMT_METHOD_SET: | |
601 | case IB_MGMT_METHOD_REPORT: | |
602 | case IB_MGMT_METHOD_TRAP_REPRESS: | |
603 | if (pkey != FULL_MGMT_P_KEY) { | |
604 | ingress_pkey_table_fail(ppd, pkey, slid); | |
605 | return 1; | |
606 | } | |
607 | break; | |
608 | case IB_MGMT_METHOD_SEND: | |
609 | case IB_MGMT_METHOD_TRAP: | |
610 | case IB_MGMT_METHOD_GET_RESP: | |
611 | case IB_MGMT_METHOD_REPORT_RESP: | |
4eb06882 | 612 | if (ibp->rvp.port_cap_flags & IB_PORT_SM) |
77241056 MM |
613 | return 0; |
614 | if (pkey == FULL_MGMT_P_KEY) { | |
615 | smp->status |= IB_SMP_UNSUP_METHOD; | |
616 | return 0; | |
617 | } | |
618 | if (pkey != LIM_MGMT_P_KEY) { | |
619 | ingress_pkey_table_fail(ppd, pkey, slid); | |
620 | return 1; | |
621 | } | |
622 | break; | |
623 | default: | |
624 | break; | |
625 | } | |
626 | return 0; | |
627 | } | |
628 | ||
629 | ||
630 | /** | |
631 | * hfi1_ud_rcv - receive an incoming UD packet | |
632 | * @ibp: the port the packet came in on | |
633 | * @hdr: the packet header | |
634 | * @rcv_flags: flags relevant to rcv processing | |
635 | * @data: the packet data | |
636 | * @tlen: the packet length | |
637 | * @qp: the QP the packet came on | |
638 | * | |
639 | * This is called from qp_rcv() to process an incoming UD packet | |
640 | * for the given QP. | |
641 | * Called at interrupt level. | |
642 | */ | |
643 | void hfi1_ud_rcv(struct hfi1_packet *packet) | |
644 | { | |
645 | struct hfi1_other_headers *ohdr = packet->ohdr; | |
646 | int opcode; | |
647 | u32 hdrsize = packet->hlen; | |
648 | u32 pad; | |
649 | struct ib_wc wc; | |
650 | u32 qkey; | |
651 | u32 src_qp; | |
652 | u16 dlid, pkey; | |
653 | int mgmt_pkey_idx = -1; | |
654 | struct hfi1_ibport *ibp = &packet->rcd->ppd->ibport_data; | |
655 | struct hfi1_ib_header *hdr = packet->hdr; | |
656 | u32 rcv_flags = packet->rcv_flags; | |
657 | void *data = packet->ebuf; | |
658 | u32 tlen = packet->tlen; | |
895420dd | 659 | struct rvt_qp *qp = packet->qp; |
77241056 MM |
660 | bool has_grh = rcv_flags & HFI1_HAS_GRH; |
661 | bool sc4_bit = has_sc4_bit(packet); | |
662 | u8 sc; | |
663 | u32 bth1; | |
664 | int is_mcast; | |
665 | struct ib_grh *grh = NULL; | |
666 | ||
667 | qkey = be32_to_cpu(ohdr->u.ud.deth[0]); | |
ec4274f1 | 668 | src_qp = be32_to_cpu(ohdr->u.ud.deth[1]) & RVT_QPN_MASK; |
77241056 | 669 | dlid = be16_to_cpu(hdr->lrh[1]); |
8859b4a6 DD |
670 | is_mcast = (dlid > be16_to_cpu(IB_MULTICAST_LID_BASE)) && |
671 | (dlid != be16_to_cpu(IB_LID_PERMISSIVE)); | |
77241056 MM |
672 | bth1 = be32_to_cpu(ohdr->bth[1]); |
673 | if (unlikely(bth1 & HFI1_BECN_SMASK)) { | |
674 | /* | |
675 | * In pre-B0 h/w the CNP_OPCODE is handled via an | |
624be1db | 676 | * error path. |
77241056 MM |
677 | */ |
678 | struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); | |
ec4274f1 | 679 | u32 lqpn = be32_to_cpu(ohdr->bth[1]) & RVT_QPN_MASK; |
77241056 MM |
680 | u8 sl, sc5; |
681 | ||
682 | sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf; | |
683 | sc5 |= sc4_bit; | |
684 | sl = ibp->sc_to_sl[sc5]; | |
685 | ||
686 | process_becn(ppd, sl, 0, lqpn, 0, IB_CC_SVCTYPE_UD); | |
687 | } | |
688 | ||
689 | /* | |
690 | * The opcode is in the low byte when its in network order | |
691 | * (top byte when in host order). | |
692 | */ | |
693 | opcode = be32_to_cpu(ohdr->bth[0]) >> 24; | |
694 | opcode &= 0xff; | |
695 | ||
696 | pkey = (u16)be32_to_cpu(ohdr->bth[0]); | |
697 | ||
698 | if (!is_mcast && (opcode != IB_OPCODE_CNP) && bth1 & HFI1_FECN_SMASK) { | |
699 | u16 slid = be16_to_cpu(hdr->lrh[3]); | |
700 | u8 sc5; | |
701 | ||
702 | sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf; | |
703 | sc5 |= sc4_bit; | |
704 | ||
705 | return_cnp(ibp, qp, src_qp, pkey, dlid, slid, sc5, grh); | |
706 | } | |
707 | /* | |
708 | * Get the number of bytes the message was padded by | |
709 | * and drop incomplete packets. | |
710 | */ | |
711 | pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3; | |
712 | if (unlikely(tlen < (hdrsize + pad + 4))) | |
713 | goto drop; | |
714 | ||
715 | tlen -= hdrsize + pad + 4; | |
716 | ||
717 | /* | |
718 | * Check that the permissive LID is only used on QP0 | |
719 | * and the QKEY matches (see 9.6.1.4.1 and 9.6.1.5.1). | |
720 | */ | |
721 | if (qp->ibqp.qp_num) { | |
722 | if (unlikely(hdr->lrh[1] == IB_LID_PERMISSIVE || | |
723 | hdr->lrh[3] == IB_LID_PERMISSIVE)) | |
724 | goto drop; | |
725 | if (qp->ibqp.qp_num > 1) { | |
726 | struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); | |
727 | u16 slid; | |
728 | u8 sc5; | |
729 | ||
730 | sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf; | |
731 | sc5 |= sc4_bit; | |
732 | ||
733 | slid = be16_to_cpu(hdr->lrh[3]); | |
734 | if (unlikely(rcv_pkey_check(ppd, pkey, sc5, slid))) { | |
735 | /* | |
736 | * Traps will not be sent for packets dropped | |
737 | * by the HW. This is fine, as sending trap | |
738 | * for invalid pkeys is optional according to | |
739 | * IB spec (release 1.3, section 10.9.4) | |
740 | */ | |
5cd24119 | 741 | hfi1_bad_pqkey(ibp, OPA_TRAP_BAD_P_KEY, |
77241056 MM |
742 | pkey, |
743 | (be16_to_cpu(hdr->lrh[0]) >> 4) & | |
744 | 0xF, | |
745 | src_qp, qp->ibqp.qp_num, | |
5cd24119 EK |
746 | be16_to_cpu(hdr->lrh[3]), |
747 | be16_to_cpu(hdr->lrh[1])); | |
77241056 MM |
748 | return; |
749 | } | |
750 | } else { | |
751 | /* GSI packet */ | |
752 | mgmt_pkey_idx = hfi1_lookup_pkey_idx(ibp, pkey); | |
753 | if (mgmt_pkey_idx < 0) | |
754 | goto drop; | |
755 | ||
756 | } | |
757 | if (unlikely(qkey != qp->qkey)) { | |
5cd24119 | 758 | hfi1_bad_pqkey(ibp, OPA_TRAP_BAD_Q_KEY, qkey, |
77241056 MM |
759 | (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF, |
760 | src_qp, qp->ibqp.qp_num, | |
5cd24119 EK |
761 | be16_to_cpu(hdr->lrh[3]), |
762 | be16_to_cpu(hdr->lrh[1])); | |
77241056 MM |
763 | return; |
764 | } | |
765 | /* Drop invalid MAD packets (see 13.5.3.1). */ | |
766 | if (unlikely(qp->ibqp.qp_num == 1 && | |
767 | (tlen > 2048 || | |
768 | (be16_to_cpu(hdr->lrh[0]) >> 12) == 15))) | |
769 | goto drop; | |
770 | } else { | |
771 | /* Received on QP0, and so by definition, this is an SMP */ | |
772 | struct opa_smp *smp = (struct opa_smp *)data; | |
773 | u16 slid = be16_to_cpu(hdr->lrh[3]); | |
774 | u8 sc5; | |
775 | ||
776 | sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf; | |
777 | sc5 |= sc4_bit; | |
778 | ||
779 | if (opa_smp_check(ibp, pkey, sc5, qp, slid, smp)) | |
780 | goto drop; | |
781 | ||
782 | if (tlen > 2048) | |
783 | goto drop; | |
784 | if ((hdr->lrh[1] == IB_LID_PERMISSIVE || | |
785 | hdr->lrh[3] == IB_LID_PERMISSIVE) && | |
786 | smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
787 | goto drop; | |
788 | ||
789 | /* look up SMI pkey */ | |
790 | mgmt_pkey_idx = hfi1_lookup_pkey_idx(ibp, pkey); | |
791 | if (mgmt_pkey_idx < 0) | |
792 | goto drop; | |
793 | ||
794 | } | |
795 | ||
796 | if (qp->ibqp.qp_num > 1 && | |
797 | opcode == IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE) { | |
798 | wc.ex.imm_data = ohdr->u.ud.imm_data; | |
799 | wc.wc_flags = IB_WC_WITH_IMM; | |
800 | tlen -= sizeof(u32); | |
801 | } else if (opcode == IB_OPCODE_UD_SEND_ONLY) { | |
802 | wc.ex.imm_data = 0; | |
803 | wc.wc_flags = 0; | |
804 | } else | |
805 | goto drop; | |
806 | ||
807 | /* | |
808 | * A GRH is expected to precede the data even if not | |
809 | * present on the wire. | |
810 | */ | |
811 | wc.byte_len = tlen + sizeof(struct ib_grh); | |
812 | ||
813 | /* | |
814 | * Get the next work request entry to find where to put the data. | |
815 | */ | |
54d10c1e DD |
816 | if (qp->r_flags & RVT_R_REUSE_SGE) |
817 | qp->r_flags &= ~RVT_R_REUSE_SGE; | |
77241056 MM |
818 | else { |
819 | int ret; | |
820 | ||
ec4274f1 | 821 | ret = hfi1_rvt_get_rwqe(qp, 0); |
77241056 MM |
822 | if (ret < 0) { |
823 | hfi1_rc_error(qp, IB_WC_LOC_QP_OP_ERR); | |
824 | return; | |
825 | } | |
826 | if (!ret) { | |
827 | if (qp->ibqp.qp_num == 0) | |
4eb06882 | 828 | ibp->rvp.n_vl15_dropped++; |
77241056 MM |
829 | return; |
830 | } | |
831 | } | |
832 | /* Silently drop packets which are too big. */ | |
833 | if (unlikely(wc.byte_len > qp->r_len)) { | |
54d10c1e | 834 | qp->r_flags |= RVT_R_REUSE_SGE; |
77241056 MM |
835 | goto drop; |
836 | } | |
837 | if (has_grh) { | |
838 | hfi1_copy_sge(&qp->r_sge, &hdr->u.l.grh, | |
7b0b01aa | 839 | sizeof(struct ib_grh), 1, 0); |
77241056 MM |
840 | wc.wc_flags |= IB_WC_GRH; |
841 | } else | |
842 | hfi1_skip_sge(&qp->r_sge, sizeof(struct ib_grh), 1); | |
7b0b01aa DL |
843 | hfi1_copy_sge(&qp->r_sge, data, wc.byte_len - sizeof(struct ib_grh), |
844 | 1, 0); | |
ec4274f1 | 845 | rvt_put_ss(&qp->r_sge); |
54d10c1e | 846 | if (!test_and_clear_bit(RVT_R_WRID_VALID, &qp->r_aflags)) |
77241056 MM |
847 | return; |
848 | wc.wr_id = qp->r_wr_id; | |
849 | wc.status = IB_WC_SUCCESS; | |
850 | wc.opcode = IB_WC_RECV; | |
851 | wc.vendor_err = 0; | |
852 | wc.qp = &qp->ibqp; | |
853 | wc.src_qp = src_qp; | |
854 | ||
855 | if (qp->ibqp.qp_type == IB_QPT_GSI || | |
856 | qp->ibqp.qp_type == IB_QPT_SMI) { | |
857 | if (mgmt_pkey_idx < 0) { | |
858 | if (net_ratelimit()) { | |
859 | struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); | |
860 | struct hfi1_devdata *dd = ppd->dd; | |
861 | ||
862 | dd_dev_err(dd, "QP type %d mgmt_pkey_idx < 0 and packet not dropped???\n", | |
863 | qp->ibqp.qp_type); | |
864 | mgmt_pkey_idx = 0; | |
865 | } | |
866 | } | |
867 | wc.pkey_index = (unsigned)mgmt_pkey_idx; | |
868 | } else | |
869 | wc.pkey_index = 0; | |
870 | ||
871 | wc.slid = be16_to_cpu(hdr->lrh[3]); | |
872 | sc = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf; | |
873 | sc |= sc4_bit; | |
874 | wc.sl = ibp->sc_to_sl[sc]; | |
875 | ||
876 | /* | |
877 | * Save the LMC lower bits if the destination LID is a unicast LID. | |
878 | */ | |
8859b4a6 | 879 | wc.dlid_path_bits = dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE) ? 0 : |
77241056 MM |
880 | dlid & ((1 << ppd_from_ibp(ibp)->lmc) - 1); |
881 | wc.port_num = qp->port_num; | |
882 | /* Signal completion event if the solicited bit is set. */ | |
abd712da DD |
883 | rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, |
884 | (ohdr->bth[0] & | |
885 | cpu_to_be32(IB_BTH_SOLICITED)) != 0); | |
77241056 MM |
886 | return; |
887 | ||
888 | drop: | |
4eb06882 | 889 | ibp->rvp.n_pkt_drops++; |
77241056 | 890 | } |