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Merge tag 'drm-intel-next-fixes-2015-04-25' of git://anongit.freedesktop.org/drm...
[deliverable/linux.git] / drivers / infiniband / hw / mlx4 / qp.c
1 /*
2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34 #include <linux/log2.h>
35 #include <linux/slab.h>
36 #include <linux/netdevice.h>
37
38 #include <rdma/ib_cache.h>
39 #include <rdma/ib_pack.h>
40 #include <rdma/ib_addr.h>
41 #include <rdma/ib_mad.h>
42
43 #include <linux/mlx4/driver.h>
44 #include <linux/mlx4/qp.h>
45
46 #include "mlx4_ib.h"
47 #include "user.h"
48
49 static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq,
50 struct mlx4_ib_cq *recv_cq);
51 static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq,
52 struct mlx4_ib_cq *recv_cq);
53
54 enum {
55 MLX4_IB_ACK_REQ_FREQ = 8,
56 };
57
58 enum {
59 MLX4_IB_DEFAULT_SCHED_QUEUE = 0x83,
60 MLX4_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f,
61 MLX4_IB_LINK_TYPE_IB = 0,
62 MLX4_IB_LINK_TYPE_ETH = 1
63 };
64
65 enum {
66 /*
67 * Largest possible UD header: send with GRH and immediate
68 * data plus 18 bytes for an Ethernet header with VLAN/802.1Q
69 * tag. (LRH would only use 8 bytes, so Ethernet is the
70 * biggest case)
71 */
72 MLX4_IB_UD_HEADER_SIZE = 82,
73 MLX4_IB_LSO_HEADER_SPARE = 128,
74 };
75
76 enum {
77 MLX4_IB_IBOE_ETHERTYPE = 0x8915
78 };
79
80 struct mlx4_ib_sqp {
81 struct mlx4_ib_qp qp;
82 int pkey_index;
83 u32 qkey;
84 u32 send_psn;
85 struct ib_ud_header ud_header;
86 u8 header_buf[MLX4_IB_UD_HEADER_SIZE];
87 };
88
89 enum {
90 MLX4_IB_MIN_SQ_STRIDE = 6,
91 MLX4_IB_CACHE_LINE_SIZE = 64,
92 };
93
94 enum {
95 MLX4_RAW_QP_MTU = 7,
96 MLX4_RAW_QP_MSGMAX = 31,
97 };
98
99 #ifndef ETH_ALEN
100 #define ETH_ALEN 6
101 #endif
102
103 static const __be32 mlx4_ib_opcode[] = {
104 [IB_WR_SEND] = cpu_to_be32(MLX4_OPCODE_SEND),
105 [IB_WR_LSO] = cpu_to_be32(MLX4_OPCODE_LSO),
106 [IB_WR_SEND_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_SEND_IMM),
107 [IB_WR_RDMA_WRITE] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE),
108 [IB_WR_RDMA_WRITE_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE_IMM),
109 [IB_WR_RDMA_READ] = cpu_to_be32(MLX4_OPCODE_RDMA_READ),
110 [IB_WR_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_ATOMIC_CS),
111 [IB_WR_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_ATOMIC_FA),
112 [IB_WR_SEND_WITH_INV] = cpu_to_be32(MLX4_OPCODE_SEND_INVAL),
113 [IB_WR_LOCAL_INV] = cpu_to_be32(MLX4_OPCODE_LOCAL_INVAL),
114 [IB_WR_FAST_REG_MR] = cpu_to_be32(MLX4_OPCODE_FMR),
115 [IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_CS),
116 [IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_FA),
117 [IB_WR_BIND_MW] = cpu_to_be32(MLX4_OPCODE_BIND_MW),
118 };
119
120 static struct mlx4_ib_sqp *to_msqp(struct mlx4_ib_qp *mqp)
121 {
122 return container_of(mqp, struct mlx4_ib_sqp, qp);
123 }
124
125 static int is_tunnel_qp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
126 {
127 if (!mlx4_is_master(dev->dev))
128 return 0;
129
130 return qp->mqp.qpn >= dev->dev->phys_caps.base_tunnel_sqpn &&
131 qp->mqp.qpn < dev->dev->phys_caps.base_tunnel_sqpn +
132 8 * MLX4_MFUNC_MAX;
133 }
134
135 static int is_sqp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
136 {
137 int proxy_sqp = 0;
138 int real_sqp = 0;
139 int i;
140 /* PPF or Native -- real SQP */
141 real_sqp = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) &&
142 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn &&
143 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 3);
144 if (real_sqp)
145 return 1;
146 /* VF or PF -- proxy SQP */
147 if (mlx4_is_mfunc(dev->dev)) {
148 for (i = 0; i < dev->dev->caps.num_ports; i++) {
149 if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i] ||
150 qp->mqp.qpn == dev->dev->caps.qp1_proxy[i]) {
151 proxy_sqp = 1;
152 break;
153 }
154 }
155 }
156 return proxy_sqp;
157 }
158
159 /* used for INIT/CLOSE port logic */
160 static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
161 {
162 int proxy_qp0 = 0;
163 int real_qp0 = 0;
164 int i;
165 /* PPF or Native -- real QP0 */
166 real_qp0 = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) &&
167 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn &&
168 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 1);
169 if (real_qp0)
170 return 1;
171 /* VF or PF -- proxy QP0 */
172 if (mlx4_is_mfunc(dev->dev)) {
173 for (i = 0; i < dev->dev->caps.num_ports; i++) {
174 if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i]) {
175 proxy_qp0 = 1;
176 break;
177 }
178 }
179 }
180 return proxy_qp0;
181 }
182
183 static void *get_wqe(struct mlx4_ib_qp *qp, int offset)
184 {
185 return mlx4_buf_offset(&qp->buf, offset);
186 }
187
188 static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n)
189 {
190 return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift));
191 }
192
193 static void *get_send_wqe(struct mlx4_ib_qp *qp, int n)
194 {
195 return get_wqe(qp, qp->sq.offset + (n << qp->sq.wqe_shift));
196 }
197
198 /*
199 * Stamp a SQ WQE so that it is invalid if prefetched by marking the
200 * first four bytes of every 64 byte chunk with
201 * 0x7FFFFFF | (invalid_ownership_value << 31).
202 *
203 * When the max work request size is less than or equal to the WQE
204 * basic block size, as an optimization, we can stamp all WQEs with
205 * 0xffffffff, and skip the very first chunk of each WQE.
206 */
207 static void stamp_send_wqe(struct mlx4_ib_qp *qp, int n, int size)
208 {
209 __be32 *wqe;
210 int i;
211 int s;
212 int ind;
213 void *buf;
214 __be32 stamp;
215 struct mlx4_wqe_ctrl_seg *ctrl;
216
217 if (qp->sq_max_wqes_per_wr > 1) {
218 s = roundup(size, 1U << qp->sq.wqe_shift);
219 for (i = 0; i < s; i += 64) {
220 ind = (i >> qp->sq.wqe_shift) + n;
221 stamp = ind & qp->sq.wqe_cnt ? cpu_to_be32(0x7fffffff) :
222 cpu_to_be32(0xffffffff);
223 buf = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
224 wqe = buf + (i & ((1 << qp->sq.wqe_shift) - 1));
225 *wqe = stamp;
226 }
227 } else {
228 ctrl = buf = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
229 s = (ctrl->fence_size & 0x3f) << 4;
230 for (i = 64; i < s; i += 64) {
231 wqe = buf + i;
232 *wqe = cpu_to_be32(0xffffffff);
233 }
234 }
235 }
236
237 static void post_nop_wqe(struct mlx4_ib_qp *qp, int n, int size)
238 {
239 struct mlx4_wqe_ctrl_seg *ctrl;
240 struct mlx4_wqe_inline_seg *inl;
241 void *wqe;
242 int s;
243
244 ctrl = wqe = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
245 s = sizeof(struct mlx4_wqe_ctrl_seg);
246
247 if (qp->ibqp.qp_type == IB_QPT_UD) {
248 struct mlx4_wqe_datagram_seg *dgram = wqe + sizeof *ctrl;
249 struct mlx4_av *av = (struct mlx4_av *)dgram->av;
250 memset(dgram, 0, sizeof *dgram);
251 av->port_pd = cpu_to_be32((qp->port << 24) | to_mpd(qp->ibqp.pd)->pdn);
252 s += sizeof(struct mlx4_wqe_datagram_seg);
253 }
254
255 /* Pad the remainder of the WQE with an inline data segment. */
256 if (size > s) {
257 inl = wqe + s;
258 inl->byte_count = cpu_to_be32(1 << 31 | (size - s - sizeof *inl));
259 }
260 ctrl->srcrb_flags = 0;
261 ctrl->fence_size = size / 16;
262 /*
263 * Make sure descriptor is fully written before setting ownership bit
264 * (because HW can start executing as soon as we do).
265 */
266 wmb();
267
268 ctrl->owner_opcode = cpu_to_be32(MLX4_OPCODE_NOP | MLX4_WQE_CTRL_NEC) |
269 (n & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0);
270
271 stamp_send_wqe(qp, n + qp->sq_spare_wqes, size);
272 }
273
274 /* Post NOP WQE to prevent wrap-around in the middle of WR */
275 static inline unsigned pad_wraparound(struct mlx4_ib_qp *qp, int ind)
276 {
277 unsigned s = qp->sq.wqe_cnt - (ind & (qp->sq.wqe_cnt - 1));
278 if (unlikely(s < qp->sq_max_wqes_per_wr)) {
279 post_nop_wqe(qp, ind, s << qp->sq.wqe_shift);
280 ind += s;
281 }
282 return ind;
283 }
284
285 static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type)
286 {
287 struct ib_event event;
288 struct ib_qp *ibqp = &to_mibqp(qp)->ibqp;
289
290 if (type == MLX4_EVENT_TYPE_PATH_MIG)
291 to_mibqp(qp)->port = to_mibqp(qp)->alt_port;
292
293 if (ibqp->event_handler) {
294 event.device = ibqp->device;
295 event.element.qp = ibqp;
296 switch (type) {
297 case MLX4_EVENT_TYPE_PATH_MIG:
298 event.event = IB_EVENT_PATH_MIG;
299 break;
300 case MLX4_EVENT_TYPE_COMM_EST:
301 event.event = IB_EVENT_COMM_EST;
302 break;
303 case MLX4_EVENT_TYPE_SQ_DRAINED:
304 event.event = IB_EVENT_SQ_DRAINED;
305 break;
306 case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
307 event.event = IB_EVENT_QP_LAST_WQE_REACHED;
308 break;
309 case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
310 event.event = IB_EVENT_QP_FATAL;
311 break;
312 case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
313 event.event = IB_EVENT_PATH_MIG_ERR;
314 break;
315 case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
316 event.event = IB_EVENT_QP_REQ_ERR;
317 break;
318 case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
319 event.event = IB_EVENT_QP_ACCESS_ERR;
320 break;
321 default:
322 pr_warn("Unexpected event type %d "
323 "on QP %06x\n", type, qp->qpn);
324 return;
325 }
326
327 ibqp->event_handler(&event, ibqp->qp_context);
328 }
329 }
330
331 static int send_wqe_overhead(enum mlx4_ib_qp_type type, u32 flags)
332 {
333 /*
334 * UD WQEs must have a datagram segment.
335 * RC and UC WQEs might have a remote address segment.
336 * MLX WQEs need two extra inline data segments (for the UD
337 * header and space for the ICRC).
338 */
339 switch (type) {
340 case MLX4_IB_QPT_UD:
341 return sizeof (struct mlx4_wqe_ctrl_seg) +
342 sizeof (struct mlx4_wqe_datagram_seg) +
343 ((flags & MLX4_IB_QP_LSO) ? MLX4_IB_LSO_HEADER_SPARE : 0);
344 case MLX4_IB_QPT_PROXY_SMI_OWNER:
345 case MLX4_IB_QPT_PROXY_SMI:
346 case MLX4_IB_QPT_PROXY_GSI:
347 return sizeof (struct mlx4_wqe_ctrl_seg) +
348 sizeof (struct mlx4_wqe_datagram_seg) + 64;
349 case MLX4_IB_QPT_TUN_SMI_OWNER:
350 case MLX4_IB_QPT_TUN_GSI:
351 return sizeof (struct mlx4_wqe_ctrl_seg) +
352 sizeof (struct mlx4_wqe_datagram_seg);
353
354 case MLX4_IB_QPT_UC:
355 return sizeof (struct mlx4_wqe_ctrl_seg) +
356 sizeof (struct mlx4_wqe_raddr_seg);
357 case MLX4_IB_QPT_RC:
358 return sizeof (struct mlx4_wqe_ctrl_seg) +
359 sizeof (struct mlx4_wqe_atomic_seg) +
360 sizeof (struct mlx4_wqe_raddr_seg);
361 case MLX4_IB_QPT_SMI:
362 case MLX4_IB_QPT_GSI:
363 return sizeof (struct mlx4_wqe_ctrl_seg) +
364 ALIGN(MLX4_IB_UD_HEADER_SIZE +
365 DIV_ROUND_UP(MLX4_IB_UD_HEADER_SIZE,
366 MLX4_INLINE_ALIGN) *
367 sizeof (struct mlx4_wqe_inline_seg),
368 sizeof (struct mlx4_wqe_data_seg)) +
369 ALIGN(4 +
370 sizeof (struct mlx4_wqe_inline_seg),
371 sizeof (struct mlx4_wqe_data_seg));
372 default:
373 return sizeof (struct mlx4_wqe_ctrl_seg);
374 }
375 }
376
377 static int set_rq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
378 int is_user, int has_rq, struct mlx4_ib_qp *qp)
379 {
380 /* Sanity check RQ size before proceeding */
381 if (cap->max_recv_wr > dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE ||
382 cap->max_recv_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg))
383 return -EINVAL;
384
385 if (!has_rq) {
386 if (cap->max_recv_wr)
387 return -EINVAL;
388
389 qp->rq.wqe_cnt = qp->rq.max_gs = 0;
390 } else {
391 /* HW requires >= 1 RQ entry with >= 1 gather entry */
392 if (is_user && (!cap->max_recv_wr || !cap->max_recv_sge))
393 return -EINVAL;
394
395 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, cap->max_recv_wr));
396 qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge));
397 qp->rq.wqe_shift = ilog2(qp->rq.max_gs * sizeof (struct mlx4_wqe_data_seg));
398 }
399
400 /* leave userspace return values as they were, so as not to break ABI */
401 if (is_user) {
402 cap->max_recv_wr = qp->rq.max_post = qp->rq.wqe_cnt;
403 cap->max_recv_sge = qp->rq.max_gs;
404 } else {
405 cap->max_recv_wr = qp->rq.max_post =
406 min(dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE, qp->rq.wqe_cnt);
407 cap->max_recv_sge = min(qp->rq.max_gs,
408 min(dev->dev->caps.max_sq_sg,
409 dev->dev->caps.max_rq_sg));
410 }
411
412 return 0;
413 }
414
415 static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
416 enum mlx4_ib_qp_type type, struct mlx4_ib_qp *qp)
417 {
418 int s;
419
420 /* Sanity check SQ size before proceeding */
421 if (cap->max_send_wr > (dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE) ||
422 cap->max_send_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg) ||
423 cap->max_inline_data + send_wqe_overhead(type, qp->flags) +
424 sizeof (struct mlx4_wqe_inline_seg) > dev->dev->caps.max_sq_desc_sz)
425 return -EINVAL;
426
427 /*
428 * For MLX transport we need 2 extra S/G entries:
429 * one for the header and one for the checksum at the end
430 */
431 if ((type == MLX4_IB_QPT_SMI || type == MLX4_IB_QPT_GSI ||
432 type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) &&
433 cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg)
434 return -EINVAL;
435
436 s = max(cap->max_send_sge * sizeof (struct mlx4_wqe_data_seg),
437 cap->max_inline_data + sizeof (struct mlx4_wqe_inline_seg)) +
438 send_wqe_overhead(type, qp->flags);
439
440 if (s > dev->dev->caps.max_sq_desc_sz)
441 return -EINVAL;
442
443 /*
444 * Hermon supports shrinking WQEs, such that a single work
445 * request can include multiple units of 1 << wqe_shift. This
446 * way, work requests can differ in size, and do not have to
447 * be a power of 2 in size, saving memory and speeding up send
448 * WR posting. Unfortunately, if we do this then the
449 * wqe_index field in CQEs can't be used to look up the WR ID
450 * anymore, so we do this only if selective signaling is off.
451 *
452 * Further, on 32-bit platforms, we can't use vmap() to make
453 * the QP buffer virtually contiguous. Thus we have to use
454 * constant-sized WRs to make sure a WR is always fully within
455 * a single page-sized chunk.
456 *
457 * Finally, we use NOP work requests to pad the end of the
458 * work queue, to avoid wrap-around in the middle of WR. We
459 * set NEC bit to avoid getting completions with error for
460 * these NOP WRs, but since NEC is only supported starting
461 * with firmware 2.2.232, we use constant-sized WRs for older
462 * firmware.
463 *
464 * And, since MLX QPs only support SEND, we use constant-sized
465 * WRs in this case.
466 *
467 * We look for the smallest value of wqe_shift such that the
468 * resulting number of wqes does not exceed device
469 * capabilities.
470 *
471 * We set WQE size to at least 64 bytes, this way stamping
472 * invalidates each WQE.
473 */
474 if (dev->dev->caps.fw_ver >= MLX4_FW_VER_WQE_CTRL_NEC &&
475 qp->sq_signal_bits && BITS_PER_LONG == 64 &&
476 type != MLX4_IB_QPT_SMI && type != MLX4_IB_QPT_GSI &&
477 !(type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_PROXY_SMI |
478 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER)))
479 qp->sq.wqe_shift = ilog2(64);
480 else
481 qp->sq.wqe_shift = ilog2(roundup_pow_of_two(s));
482
483 for (;;) {
484 qp->sq_max_wqes_per_wr = DIV_ROUND_UP(s, 1U << qp->sq.wqe_shift);
485
486 /*
487 * We need to leave 2 KB + 1 WR of headroom in the SQ to
488 * allow HW to prefetch.
489 */
490 qp->sq_spare_wqes = (2048 >> qp->sq.wqe_shift) + qp->sq_max_wqes_per_wr;
491 qp->sq.wqe_cnt = roundup_pow_of_two(cap->max_send_wr *
492 qp->sq_max_wqes_per_wr +
493 qp->sq_spare_wqes);
494
495 if (qp->sq.wqe_cnt <= dev->dev->caps.max_wqes)
496 break;
497
498 if (qp->sq_max_wqes_per_wr <= 1)
499 return -EINVAL;
500
501 ++qp->sq.wqe_shift;
502 }
503
504 qp->sq.max_gs = (min(dev->dev->caps.max_sq_desc_sz,
505 (qp->sq_max_wqes_per_wr << qp->sq.wqe_shift)) -
506 send_wqe_overhead(type, qp->flags)) /
507 sizeof (struct mlx4_wqe_data_seg);
508
509 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
510 (qp->sq.wqe_cnt << qp->sq.wqe_shift);
511 if (qp->rq.wqe_shift > qp->sq.wqe_shift) {
512 qp->rq.offset = 0;
513 qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift;
514 } else {
515 qp->rq.offset = qp->sq.wqe_cnt << qp->sq.wqe_shift;
516 qp->sq.offset = 0;
517 }
518
519 cap->max_send_wr = qp->sq.max_post =
520 (qp->sq.wqe_cnt - qp->sq_spare_wqes) / qp->sq_max_wqes_per_wr;
521 cap->max_send_sge = min(qp->sq.max_gs,
522 min(dev->dev->caps.max_sq_sg,
523 dev->dev->caps.max_rq_sg));
524 /* We don't support inline sends for kernel QPs (yet) */
525 cap->max_inline_data = 0;
526
527 return 0;
528 }
529
530 static int set_user_sq_size(struct mlx4_ib_dev *dev,
531 struct mlx4_ib_qp *qp,
532 struct mlx4_ib_create_qp *ucmd)
533 {
534 /* Sanity check SQ size before proceeding */
535 if ((1 << ucmd->log_sq_bb_count) > dev->dev->caps.max_wqes ||
536 ucmd->log_sq_stride >
537 ilog2(roundup_pow_of_two(dev->dev->caps.max_sq_desc_sz)) ||
538 ucmd->log_sq_stride < MLX4_IB_MIN_SQ_STRIDE)
539 return -EINVAL;
540
541 qp->sq.wqe_cnt = 1 << ucmd->log_sq_bb_count;
542 qp->sq.wqe_shift = ucmd->log_sq_stride;
543
544 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
545 (qp->sq.wqe_cnt << qp->sq.wqe_shift);
546
547 return 0;
548 }
549
550 static int alloc_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp)
551 {
552 int i;
553
554 qp->sqp_proxy_rcv =
555 kmalloc(sizeof (struct mlx4_ib_buf) * qp->rq.wqe_cnt,
556 GFP_KERNEL);
557 if (!qp->sqp_proxy_rcv)
558 return -ENOMEM;
559 for (i = 0; i < qp->rq.wqe_cnt; i++) {
560 qp->sqp_proxy_rcv[i].addr =
561 kmalloc(sizeof (struct mlx4_ib_proxy_sqp_hdr),
562 GFP_KERNEL);
563 if (!qp->sqp_proxy_rcv[i].addr)
564 goto err;
565 qp->sqp_proxy_rcv[i].map =
566 ib_dma_map_single(dev, qp->sqp_proxy_rcv[i].addr,
567 sizeof (struct mlx4_ib_proxy_sqp_hdr),
568 DMA_FROM_DEVICE);
569 if (ib_dma_mapping_error(dev, qp->sqp_proxy_rcv[i].map)) {
570 kfree(qp->sqp_proxy_rcv[i].addr);
571 goto err;
572 }
573 }
574 return 0;
575
576 err:
577 while (i > 0) {
578 --i;
579 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map,
580 sizeof (struct mlx4_ib_proxy_sqp_hdr),
581 DMA_FROM_DEVICE);
582 kfree(qp->sqp_proxy_rcv[i].addr);
583 }
584 kfree(qp->sqp_proxy_rcv);
585 qp->sqp_proxy_rcv = NULL;
586 return -ENOMEM;
587 }
588
589 static void free_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp)
590 {
591 int i;
592
593 for (i = 0; i < qp->rq.wqe_cnt; i++) {
594 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map,
595 sizeof (struct mlx4_ib_proxy_sqp_hdr),
596 DMA_FROM_DEVICE);
597 kfree(qp->sqp_proxy_rcv[i].addr);
598 }
599 kfree(qp->sqp_proxy_rcv);
600 }
601
602 static int qp_has_rq(struct ib_qp_init_attr *attr)
603 {
604 if (attr->qp_type == IB_QPT_XRC_INI || attr->qp_type == IB_QPT_XRC_TGT)
605 return 0;
606
607 return !attr->srq;
608 }
609
610 static int qp0_enabled_vf(struct mlx4_dev *dev, int qpn)
611 {
612 int i;
613 for (i = 0; i < dev->caps.num_ports; i++) {
614 if (qpn == dev->caps.qp0_proxy[i])
615 return !!dev->caps.qp0_qkey[i];
616 }
617 return 0;
618 }
619
620 static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
621 struct ib_qp_init_attr *init_attr,
622 struct ib_udata *udata, int sqpn, struct mlx4_ib_qp **caller_qp,
623 gfp_t gfp)
624 {
625 int qpn;
626 int err;
627 struct mlx4_ib_sqp *sqp;
628 struct mlx4_ib_qp *qp;
629 enum mlx4_ib_qp_type qp_type = (enum mlx4_ib_qp_type) init_attr->qp_type;
630 struct mlx4_ib_cq *mcq;
631 unsigned long flags;
632
633 /* When tunneling special qps, we use a plain UD qp */
634 if (sqpn) {
635 if (mlx4_is_mfunc(dev->dev) &&
636 (!mlx4_is_master(dev->dev) ||
637 !(init_attr->create_flags & MLX4_IB_SRIOV_SQP))) {
638 if (init_attr->qp_type == IB_QPT_GSI)
639 qp_type = MLX4_IB_QPT_PROXY_GSI;
640 else {
641 if (mlx4_is_master(dev->dev) ||
642 qp0_enabled_vf(dev->dev, sqpn))
643 qp_type = MLX4_IB_QPT_PROXY_SMI_OWNER;
644 else
645 qp_type = MLX4_IB_QPT_PROXY_SMI;
646 }
647 }
648 qpn = sqpn;
649 /* add extra sg entry for tunneling */
650 init_attr->cap.max_recv_sge++;
651 } else if (init_attr->create_flags & MLX4_IB_SRIOV_TUNNEL_QP) {
652 struct mlx4_ib_qp_tunnel_init_attr *tnl_init =
653 container_of(init_attr,
654 struct mlx4_ib_qp_tunnel_init_attr, init_attr);
655 if ((tnl_init->proxy_qp_type != IB_QPT_SMI &&
656 tnl_init->proxy_qp_type != IB_QPT_GSI) ||
657 !mlx4_is_master(dev->dev))
658 return -EINVAL;
659 if (tnl_init->proxy_qp_type == IB_QPT_GSI)
660 qp_type = MLX4_IB_QPT_TUN_GSI;
661 else if (tnl_init->slave == mlx4_master_func_num(dev->dev) ||
662 mlx4_vf_smi_enabled(dev->dev, tnl_init->slave,
663 tnl_init->port))
664 qp_type = MLX4_IB_QPT_TUN_SMI_OWNER;
665 else
666 qp_type = MLX4_IB_QPT_TUN_SMI;
667 /* we are definitely in the PPF here, since we are creating
668 * tunnel QPs. base_tunnel_sqpn is therefore valid. */
669 qpn = dev->dev->phys_caps.base_tunnel_sqpn + 8 * tnl_init->slave
670 + tnl_init->proxy_qp_type * 2 + tnl_init->port - 1;
671 sqpn = qpn;
672 }
673
674 if (!*caller_qp) {
675 if (qp_type == MLX4_IB_QPT_SMI || qp_type == MLX4_IB_QPT_GSI ||
676 (qp_type & (MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_SMI_OWNER |
677 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER))) {
678 sqp = kzalloc(sizeof (struct mlx4_ib_sqp), gfp);
679 if (!sqp)
680 return -ENOMEM;
681 qp = &sqp->qp;
682 qp->pri.vid = 0xFFFF;
683 qp->alt.vid = 0xFFFF;
684 } else {
685 qp = kzalloc(sizeof (struct mlx4_ib_qp), gfp);
686 if (!qp)
687 return -ENOMEM;
688 qp->pri.vid = 0xFFFF;
689 qp->alt.vid = 0xFFFF;
690 }
691 } else
692 qp = *caller_qp;
693
694 qp->mlx4_ib_qp_type = qp_type;
695
696 mutex_init(&qp->mutex);
697 spin_lock_init(&qp->sq.lock);
698 spin_lock_init(&qp->rq.lock);
699 INIT_LIST_HEAD(&qp->gid_list);
700 INIT_LIST_HEAD(&qp->steering_rules);
701
702 qp->state = IB_QPS_RESET;
703 if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
704 qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
705
706 err = set_rq_size(dev, &init_attr->cap, !!pd->uobject, qp_has_rq(init_attr), qp);
707 if (err)
708 goto err;
709
710 if (pd->uobject) {
711 struct mlx4_ib_create_qp ucmd;
712
713 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
714 err = -EFAULT;
715 goto err;
716 }
717
718 qp->sq_no_prefetch = ucmd.sq_no_prefetch;
719
720 err = set_user_sq_size(dev, qp, &ucmd);
721 if (err)
722 goto err;
723
724 qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
725 qp->buf_size, 0, 0);
726 if (IS_ERR(qp->umem)) {
727 err = PTR_ERR(qp->umem);
728 goto err;
729 }
730
731 err = mlx4_mtt_init(dev->dev, ib_umem_page_count(qp->umem),
732 ilog2(qp->umem->page_size), &qp->mtt);
733 if (err)
734 goto err_buf;
735
736 err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem);
737 if (err)
738 goto err_mtt;
739
740 if (qp_has_rq(init_attr)) {
741 err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context),
742 ucmd.db_addr, &qp->db);
743 if (err)
744 goto err_mtt;
745 }
746 } else {
747 qp->sq_no_prefetch = 0;
748
749 if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK)
750 qp->flags |= MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK;
751
752 if (init_attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO)
753 qp->flags |= MLX4_IB_QP_LSO;
754
755 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) {
756 if (dev->steering_support ==
757 MLX4_STEERING_MODE_DEVICE_MANAGED)
758 qp->flags |= MLX4_IB_QP_NETIF;
759 else
760 goto err;
761 }
762
763 err = set_kernel_sq_size(dev, &init_attr->cap, qp_type, qp);
764 if (err)
765 goto err;
766
767 if (qp_has_rq(init_attr)) {
768 err = mlx4_db_alloc(dev->dev, &qp->db, 0, gfp);
769 if (err)
770 goto err;
771
772 *qp->db.db = 0;
773 }
774
775 if (mlx4_buf_alloc(dev->dev, qp->buf_size, PAGE_SIZE * 2, &qp->buf, gfp)) {
776 err = -ENOMEM;
777 goto err_db;
778 }
779
780 err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift,
781 &qp->mtt);
782 if (err)
783 goto err_buf;
784
785 err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf, gfp);
786 if (err)
787 goto err_mtt;
788
789 qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof (u64), gfp);
790 qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof (u64), gfp);
791 if (!qp->sq.wrid || !qp->rq.wrid) {
792 err = -ENOMEM;
793 goto err_wrid;
794 }
795 }
796
797 if (sqpn) {
798 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
799 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
800 if (alloc_proxy_bufs(pd->device, qp)) {
801 err = -ENOMEM;
802 goto err_wrid;
803 }
804 }
805 } else {
806 /* Raw packet QPNs may not have bits 6,7 set in their qp_num;
807 * otherwise, the WQE BlueFlame setup flow wrongly causes
808 * VLAN insertion. */
809 if (init_attr->qp_type == IB_QPT_RAW_PACKET)
810 err = mlx4_qp_reserve_range(dev->dev, 1, 1, &qpn,
811 (init_attr->cap.max_send_wr ?
812 MLX4_RESERVE_ETH_BF_QP : 0) |
813 (init_attr->cap.max_recv_wr ?
814 MLX4_RESERVE_A0_QP : 0));
815 else
816 if (qp->flags & MLX4_IB_QP_NETIF)
817 err = mlx4_ib_steer_qp_alloc(dev, 1, &qpn);
818 else
819 err = mlx4_qp_reserve_range(dev->dev, 1, 1,
820 &qpn, 0);
821 if (err)
822 goto err_proxy;
823 }
824
825 err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp, gfp);
826 if (err)
827 goto err_qpn;
828
829 if (init_attr->qp_type == IB_QPT_XRC_TGT)
830 qp->mqp.qpn |= (1 << 23);
831
832 /*
833 * Hardware wants QPN written in big-endian order (after
834 * shifting) for send doorbell. Precompute this value to save
835 * a little bit when posting sends.
836 */
837 qp->doorbell_qpn = swab32(qp->mqp.qpn << 8);
838
839 qp->mqp.event = mlx4_ib_qp_event;
840 if (!*caller_qp)
841 *caller_qp = qp;
842
843 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags);
844 mlx4_ib_lock_cqs(to_mcq(init_attr->send_cq),
845 to_mcq(init_attr->recv_cq));
846 /* Maintain device to QPs access, needed for further handling
847 * via reset flow
848 */
849 list_add_tail(&qp->qps_list, &dev->qp_list);
850 /* Maintain CQ to QPs access, needed for further handling
851 * via reset flow
852 */
853 mcq = to_mcq(init_attr->send_cq);
854 list_add_tail(&qp->cq_send_list, &mcq->send_qp_list);
855 mcq = to_mcq(init_attr->recv_cq);
856 list_add_tail(&qp->cq_recv_list, &mcq->recv_qp_list);
857 mlx4_ib_unlock_cqs(to_mcq(init_attr->send_cq),
858 to_mcq(init_attr->recv_cq));
859 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags);
860 return 0;
861
862 err_qpn:
863 if (!sqpn) {
864 if (qp->flags & MLX4_IB_QP_NETIF)
865 mlx4_ib_steer_qp_free(dev, qpn, 1);
866 else
867 mlx4_qp_release_range(dev->dev, qpn, 1);
868 }
869 err_proxy:
870 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI)
871 free_proxy_bufs(pd->device, qp);
872 err_wrid:
873 if (pd->uobject) {
874 if (qp_has_rq(init_attr))
875 mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db);
876 } else {
877 kfree(qp->sq.wrid);
878 kfree(qp->rq.wrid);
879 }
880
881 err_mtt:
882 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
883
884 err_buf:
885 if (pd->uobject)
886 ib_umem_release(qp->umem);
887 else
888 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
889
890 err_db:
891 if (!pd->uobject && qp_has_rq(init_attr))
892 mlx4_db_free(dev->dev, &qp->db);
893
894 err:
895 if (!*caller_qp)
896 kfree(qp);
897 return err;
898 }
899
900 static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state)
901 {
902 switch (state) {
903 case IB_QPS_RESET: return MLX4_QP_STATE_RST;
904 case IB_QPS_INIT: return MLX4_QP_STATE_INIT;
905 case IB_QPS_RTR: return MLX4_QP_STATE_RTR;
906 case IB_QPS_RTS: return MLX4_QP_STATE_RTS;
907 case IB_QPS_SQD: return MLX4_QP_STATE_SQD;
908 case IB_QPS_SQE: return MLX4_QP_STATE_SQER;
909 case IB_QPS_ERR: return MLX4_QP_STATE_ERR;
910 default: return -1;
911 }
912 }
913
914 static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
915 __acquires(&send_cq->lock) __acquires(&recv_cq->lock)
916 {
917 if (send_cq == recv_cq) {
918 spin_lock(&send_cq->lock);
919 __acquire(&recv_cq->lock);
920 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
921 spin_lock(&send_cq->lock);
922 spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING);
923 } else {
924 spin_lock(&recv_cq->lock);
925 spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING);
926 }
927 }
928
929 static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
930 __releases(&send_cq->lock) __releases(&recv_cq->lock)
931 {
932 if (send_cq == recv_cq) {
933 __release(&recv_cq->lock);
934 spin_unlock(&send_cq->lock);
935 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
936 spin_unlock(&recv_cq->lock);
937 spin_unlock(&send_cq->lock);
938 } else {
939 spin_unlock(&send_cq->lock);
940 spin_unlock(&recv_cq->lock);
941 }
942 }
943
944 static void del_gid_entries(struct mlx4_ib_qp *qp)
945 {
946 struct mlx4_ib_gid_entry *ge, *tmp;
947
948 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
949 list_del(&ge->list);
950 kfree(ge);
951 }
952 }
953
954 static struct mlx4_ib_pd *get_pd(struct mlx4_ib_qp *qp)
955 {
956 if (qp->ibqp.qp_type == IB_QPT_XRC_TGT)
957 return to_mpd(to_mxrcd(qp->ibqp.xrcd)->pd);
958 else
959 return to_mpd(qp->ibqp.pd);
960 }
961
962 static void get_cqs(struct mlx4_ib_qp *qp,
963 struct mlx4_ib_cq **send_cq, struct mlx4_ib_cq **recv_cq)
964 {
965 switch (qp->ibqp.qp_type) {
966 case IB_QPT_XRC_TGT:
967 *send_cq = to_mcq(to_mxrcd(qp->ibqp.xrcd)->cq);
968 *recv_cq = *send_cq;
969 break;
970 case IB_QPT_XRC_INI:
971 *send_cq = to_mcq(qp->ibqp.send_cq);
972 *recv_cq = *send_cq;
973 break;
974 default:
975 *send_cq = to_mcq(qp->ibqp.send_cq);
976 *recv_cq = to_mcq(qp->ibqp.recv_cq);
977 break;
978 }
979 }
980
981 static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
982 int is_user)
983 {
984 struct mlx4_ib_cq *send_cq, *recv_cq;
985 unsigned long flags;
986
987 if (qp->state != IB_QPS_RESET) {
988 if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state),
989 MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp))
990 pr_warn("modify QP %06x to RESET failed.\n",
991 qp->mqp.qpn);
992 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) {
993 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
994 qp->pri.smac = 0;
995 qp->pri.smac_port = 0;
996 }
997 if (qp->alt.smac) {
998 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
999 qp->alt.smac = 0;
1000 }
1001 if (qp->pri.vid < 0x1000) {
1002 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid);
1003 qp->pri.vid = 0xFFFF;
1004 qp->pri.candidate_vid = 0xFFFF;
1005 qp->pri.update_vid = 0;
1006 }
1007 if (qp->alt.vid < 0x1000) {
1008 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid);
1009 qp->alt.vid = 0xFFFF;
1010 qp->alt.candidate_vid = 0xFFFF;
1011 qp->alt.update_vid = 0;
1012 }
1013 }
1014
1015 get_cqs(qp, &send_cq, &recv_cq);
1016
1017 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags);
1018 mlx4_ib_lock_cqs(send_cq, recv_cq);
1019
1020 /* del from lists under both locks above to protect reset flow paths */
1021 list_del(&qp->qps_list);
1022 list_del(&qp->cq_send_list);
1023 list_del(&qp->cq_recv_list);
1024 if (!is_user) {
1025 __mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
1026 qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL);
1027 if (send_cq != recv_cq)
1028 __mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1029 }
1030
1031 mlx4_qp_remove(dev->dev, &qp->mqp);
1032
1033 mlx4_ib_unlock_cqs(send_cq, recv_cq);
1034 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags);
1035
1036 mlx4_qp_free(dev->dev, &qp->mqp);
1037
1038 if (!is_sqp(dev, qp) && !is_tunnel_qp(dev, qp)) {
1039 if (qp->flags & MLX4_IB_QP_NETIF)
1040 mlx4_ib_steer_qp_free(dev, qp->mqp.qpn, 1);
1041 else
1042 mlx4_qp_release_range(dev->dev, qp->mqp.qpn, 1);
1043 }
1044
1045 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
1046
1047 if (is_user) {
1048 if (qp->rq.wqe_cnt)
1049 mlx4_ib_db_unmap_user(to_mucontext(qp->ibqp.uobject->context),
1050 &qp->db);
1051 ib_umem_release(qp->umem);
1052 } else {
1053 kfree(qp->sq.wrid);
1054 kfree(qp->rq.wrid);
1055 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
1056 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI))
1057 free_proxy_bufs(&dev->ib_dev, qp);
1058 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
1059 if (qp->rq.wqe_cnt)
1060 mlx4_db_free(dev->dev, &qp->db);
1061 }
1062
1063 del_gid_entries(qp);
1064 }
1065
1066 static u32 get_sqp_num(struct mlx4_ib_dev *dev, struct ib_qp_init_attr *attr)
1067 {
1068 /* Native or PPF */
1069 if (!mlx4_is_mfunc(dev->dev) ||
1070 (mlx4_is_master(dev->dev) &&
1071 attr->create_flags & MLX4_IB_SRIOV_SQP)) {
1072 return dev->dev->phys_caps.base_sqpn +
1073 (attr->qp_type == IB_QPT_SMI ? 0 : 2) +
1074 attr->port_num - 1;
1075 }
1076 /* PF or VF -- creating proxies */
1077 if (attr->qp_type == IB_QPT_SMI)
1078 return dev->dev->caps.qp0_proxy[attr->port_num - 1];
1079 else
1080 return dev->dev->caps.qp1_proxy[attr->port_num - 1];
1081 }
1082
1083 struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd,
1084 struct ib_qp_init_attr *init_attr,
1085 struct ib_udata *udata)
1086 {
1087 struct mlx4_ib_qp *qp = NULL;
1088 int err;
1089 u16 xrcdn = 0;
1090 gfp_t gfp;
1091
1092 gfp = (init_attr->create_flags & MLX4_IB_QP_CREATE_USE_GFP_NOIO) ?
1093 GFP_NOIO : GFP_KERNEL;
1094 /*
1095 * We only support LSO, vendor flag1, and multicast loopback blocking,
1096 * and only for kernel UD QPs.
1097 */
1098 if (init_attr->create_flags & ~(MLX4_IB_QP_LSO |
1099 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK |
1100 MLX4_IB_SRIOV_TUNNEL_QP |
1101 MLX4_IB_SRIOV_SQP |
1102 MLX4_IB_QP_NETIF |
1103 MLX4_IB_QP_CREATE_USE_GFP_NOIO))
1104 return ERR_PTR(-EINVAL);
1105
1106 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) {
1107 if (init_attr->qp_type != IB_QPT_UD)
1108 return ERR_PTR(-EINVAL);
1109 }
1110
1111 if (init_attr->create_flags &&
1112 (udata ||
1113 ((init_attr->create_flags & ~(MLX4_IB_SRIOV_SQP | MLX4_IB_QP_CREATE_USE_GFP_NOIO)) &&
1114 init_attr->qp_type != IB_QPT_UD) ||
1115 ((init_attr->create_flags & MLX4_IB_SRIOV_SQP) &&
1116 init_attr->qp_type > IB_QPT_GSI)))
1117 return ERR_PTR(-EINVAL);
1118
1119 switch (init_attr->qp_type) {
1120 case IB_QPT_XRC_TGT:
1121 pd = to_mxrcd(init_attr->xrcd)->pd;
1122 xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn;
1123 init_attr->send_cq = to_mxrcd(init_attr->xrcd)->cq;
1124 /* fall through */
1125 case IB_QPT_XRC_INI:
1126 if (!(to_mdev(pd->device)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC))
1127 return ERR_PTR(-ENOSYS);
1128 init_attr->recv_cq = init_attr->send_cq;
1129 /* fall through */
1130 case IB_QPT_RC:
1131 case IB_QPT_UC:
1132 case IB_QPT_RAW_PACKET:
1133 qp = kzalloc(sizeof *qp, gfp);
1134 if (!qp)
1135 return ERR_PTR(-ENOMEM);
1136 qp->pri.vid = 0xFFFF;
1137 qp->alt.vid = 0xFFFF;
1138 /* fall through */
1139 case IB_QPT_UD:
1140 {
1141 err = create_qp_common(to_mdev(pd->device), pd, init_attr,
1142 udata, 0, &qp, gfp);
1143 if (err)
1144 return ERR_PTR(err);
1145
1146 qp->ibqp.qp_num = qp->mqp.qpn;
1147 qp->xrcdn = xrcdn;
1148
1149 break;
1150 }
1151 case IB_QPT_SMI:
1152 case IB_QPT_GSI:
1153 {
1154 /* Userspace is not allowed to create special QPs: */
1155 if (udata)
1156 return ERR_PTR(-EINVAL);
1157
1158 err = create_qp_common(to_mdev(pd->device), pd, init_attr, udata,
1159 get_sqp_num(to_mdev(pd->device), init_attr),
1160 &qp, gfp);
1161 if (err)
1162 return ERR_PTR(err);
1163
1164 qp->port = init_attr->port_num;
1165 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
1166
1167 break;
1168 }
1169 default:
1170 /* Don't support raw QPs */
1171 return ERR_PTR(-EINVAL);
1172 }
1173
1174 return &qp->ibqp;
1175 }
1176
1177 int mlx4_ib_destroy_qp(struct ib_qp *qp)
1178 {
1179 struct mlx4_ib_dev *dev = to_mdev(qp->device);
1180 struct mlx4_ib_qp *mqp = to_mqp(qp);
1181 struct mlx4_ib_pd *pd;
1182
1183 if (is_qp0(dev, mqp))
1184 mlx4_CLOSE_PORT(dev->dev, mqp->port);
1185
1186 if (dev->qp1_proxy[mqp->port - 1] == mqp) {
1187 mutex_lock(&dev->qp1_proxy_lock[mqp->port - 1]);
1188 dev->qp1_proxy[mqp->port - 1] = NULL;
1189 mutex_unlock(&dev->qp1_proxy_lock[mqp->port - 1]);
1190 }
1191
1192 pd = get_pd(mqp);
1193 destroy_qp_common(dev, mqp, !!pd->ibpd.uobject);
1194
1195 if (is_sqp(dev, mqp))
1196 kfree(to_msqp(mqp));
1197 else
1198 kfree(mqp);
1199
1200 return 0;
1201 }
1202
1203 static int to_mlx4_st(struct mlx4_ib_dev *dev, enum mlx4_ib_qp_type type)
1204 {
1205 switch (type) {
1206 case MLX4_IB_QPT_RC: return MLX4_QP_ST_RC;
1207 case MLX4_IB_QPT_UC: return MLX4_QP_ST_UC;
1208 case MLX4_IB_QPT_UD: return MLX4_QP_ST_UD;
1209 case MLX4_IB_QPT_XRC_INI:
1210 case MLX4_IB_QPT_XRC_TGT: return MLX4_QP_ST_XRC;
1211 case MLX4_IB_QPT_SMI:
1212 case MLX4_IB_QPT_GSI:
1213 case MLX4_IB_QPT_RAW_PACKET: return MLX4_QP_ST_MLX;
1214
1215 case MLX4_IB_QPT_PROXY_SMI_OWNER:
1216 case MLX4_IB_QPT_TUN_SMI_OWNER: return (mlx4_is_mfunc(dev->dev) ?
1217 MLX4_QP_ST_MLX : -1);
1218 case MLX4_IB_QPT_PROXY_SMI:
1219 case MLX4_IB_QPT_TUN_SMI:
1220 case MLX4_IB_QPT_PROXY_GSI:
1221 case MLX4_IB_QPT_TUN_GSI: return (mlx4_is_mfunc(dev->dev) ?
1222 MLX4_QP_ST_UD : -1);
1223 default: return -1;
1224 }
1225 }
1226
1227 static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, const struct ib_qp_attr *attr,
1228 int attr_mask)
1229 {
1230 u8 dest_rd_atomic;
1231 u32 access_flags;
1232 u32 hw_access_flags = 0;
1233
1234 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1235 dest_rd_atomic = attr->max_dest_rd_atomic;
1236 else
1237 dest_rd_atomic = qp->resp_depth;
1238
1239 if (attr_mask & IB_QP_ACCESS_FLAGS)
1240 access_flags = attr->qp_access_flags;
1241 else
1242 access_flags = qp->atomic_rd_en;
1243
1244 if (!dest_rd_atomic)
1245 access_flags &= IB_ACCESS_REMOTE_WRITE;
1246
1247 if (access_flags & IB_ACCESS_REMOTE_READ)
1248 hw_access_flags |= MLX4_QP_BIT_RRE;
1249 if (access_flags & IB_ACCESS_REMOTE_ATOMIC)
1250 hw_access_flags |= MLX4_QP_BIT_RAE;
1251 if (access_flags & IB_ACCESS_REMOTE_WRITE)
1252 hw_access_flags |= MLX4_QP_BIT_RWE;
1253
1254 return cpu_to_be32(hw_access_flags);
1255 }
1256
1257 static void store_sqp_attrs(struct mlx4_ib_sqp *sqp, const struct ib_qp_attr *attr,
1258 int attr_mask)
1259 {
1260 if (attr_mask & IB_QP_PKEY_INDEX)
1261 sqp->pkey_index = attr->pkey_index;
1262 if (attr_mask & IB_QP_QKEY)
1263 sqp->qkey = attr->qkey;
1264 if (attr_mask & IB_QP_SQ_PSN)
1265 sqp->send_psn = attr->sq_psn;
1266 }
1267
1268 static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port)
1269 {
1270 path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6);
1271 }
1272
1273 static int _mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah,
1274 u64 smac, u16 vlan_tag, struct mlx4_qp_path *path,
1275 struct mlx4_roce_smac_vlan_info *smac_info, u8 port)
1276 {
1277 int is_eth = rdma_port_get_link_layer(&dev->ib_dev, port) ==
1278 IB_LINK_LAYER_ETHERNET;
1279 int vidx;
1280 int smac_index;
1281 int err;
1282
1283
1284 path->grh_mylmc = ah->src_path_bits & 0x7f;
1285 path->rlid = cpu_to_be16(ah->dlid);
1286 if (ah->static_rate) {
1287 path->static_rate = ah->static_rate + MLX4_STAT_RATE_OFFSET;
1288 while (path->static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
1289 !(1 << path->static_rate & dev->dev->caps.stat_rate_support))
1290 --path->static_rate;
1291 } else
1292 path->static_rate = 0;
1293
1294 if (ah->ah_flags & IB_AH_GRH) {
1295 if (ah->grh.sgid_index >= dev->dev->caps.gid_table_len[port]) {
1296 pr_err("sgid_index (%u) too large. max is %d\n",
1297 ah->grh.sgid_index, dev->dev->caps.gid_table_len[port] - 1);
1298 return -1;
1299 }
1300
1301 path->grh_mylmc |= 1 << 7;
1302 path->mgid_index = ah->grh.sgid_index;
1303 path->hop_limit = ah->grh.hop_limit;
1304 path->tclass_flowlabel =
1305 cpu_to_be32((ah->grh.traffic_class << 20) |
1306 (ah->grh.flow_label));
1307 memcpy(path->rgid, ah->grh.dgid.raw, 16);
1308 }
1309
1310 if (is_eth) {
1311 if (!(ah->ah_flags & IB_AH_GRH))
1312 return -1;
1313
1314 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
1315 ((port - 1) << 6) | ((ah->sl & 7) << 3);
1316
1317 path->feup |= MLX4_FEUP_FORCE_ETH_UP;
1318 if (vlan_tag < 0x1000) {
1319 if (smac_info->vid < 0x1000) {
1320 /* both valid vlan ids */
1321 if (smac_info->vid != vlan_tag) {
1322 /* different VIDs. unreg old and reg new */
1323 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx);
1324 if (err)
1325 return err;
1326 smac_info->candidate_vid = vlan_tag;
1327 smac_info->candidate_vlan_index = vidx;
1328 smac_info->candidate_vlan_port = port;
1329 smac_info->update_vid = 1;
1330 path->vlan_index = vidx;
1331 } else {
1332 path->vlan_index = smac_info->vlan_index;
1333 }
1334 } else {
1335 /* no current vlan tag in qp */
1336 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx);
1337 if (err)
1338 return err;
1339 smac_info->candidate_vid = vlan_tag;
1340 smac_info->candidate_vlan_index = vidx;
1341 smac_info->candidate_vlan_port = port;
1342 smac_info->update_vid = 1;
1343 path->vlan_index = vidx;
1344 }
1345 path->feup |= MLX4_FVL_FORCE_ETH_VLAN;
1346 path->fl = 1 << 6;
1347 } else {
1348 /* have current vlan tag. unregister it at modify-qp success */
1349 if (smac_info->vid < 0x1000) {
1350 smac_info->candidate_vid = 0xFFFF;
1351 smac_info->update_vid = 1;
1352 }
1353 }
1354
1355 /* get smac_index for RoCE use.
1356 * If no smac was yet assigned, register one.
1357 * If one was already assigned, but the new mac differs,
1358 * unregister the old one and register the new one.
1359 */
1360 if ((!smac_info->smac && !smac_info->smac_port) ||
1361 smac_info->smac != smac) {
1362 /* register candidate now, unreg if needed, after success */
1363 smac_index = mlx4_register_mac(dev->dev, port, smac);
1364 if (smac_index >= 0) {
1365 smac_info->candidate_smac_index = smac_index;
1366 smac_info->candidate_smac = smac;
1367 smac_info->candidate_smac_port = port;
1368 } else {
1369 return -EINVAL;
1370 }
1371 } else {
1372 smac_index = smac_info->smac_index;
1373 }
1374
1375 memcpy(path->dmac, ah->dmac, 6);
1376 path->ackto = MLX4_IB_LINK_TYPE_ETH;
1377 /* put MAC table smac index for IBoE */
1378 path->grh_mylmc = (u8) (smac_index) | 0x80;
1379 } else {
1380 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
1381 ((port - 1) << 6) | ((ah->sl & 0xf) << 2);
1382 }
1383
1384 return 0;
1385 }
1386
1387 static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_qp_attr *qp,
1388 enum ib_qp_attr_mask qp_attr_mask,
1389 struct mlx4_ib_qp *mqp,
1390 struct mlx4_qp_path *path, u8 port)
1391 {
1392 return _mlx4_set_path(dev, &qp->ah_attr,
1393 mlx4_mac_to_u64((u8 *)qp->smac),
1394 (qp_attr_mask & IB_QP_VID) ? qp->vlan_id : 0xffff,
1395 path, &mqp->pri, port);
1396 }
1397
1398 static int mlx4_set_alt_path(struct mlx4_ib_dev *dev,
1399 const struct ib_qp_attr *qp,
1400 enum ib_qp_attr_mask qp_attr_mask,
1401 struct mlx4_ib_qp *mqp,
1402 struct mlx4_qp_path *path, u8 port)
1403 {
1404 return _mlx4_set_path(dev, &qp->alt_ah_attr,
1405 mlx4_mac_to_u64((u8 *)qp->alt_smac),
1406 (qp_attr_mask & IB_QP_ALT_VID) ?
1407 qp->alt_vlan_id : 0xffff,
1408 path, &mqp->alt, port);
1409 }
1410
1411 static void update_mcg_macs(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
1412 {
1413 struct mlx4_ib_gid_entry *ge, *tmp;
1414
1415 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
1416 if (!ge->added && mlx4_ib_add_mc(dev, qp, &ge->gid)) {
1417 ge->added = 1;
1418 ge->port = qp->port;
1419 }
1420 }
1421 }
1422
1423 static int handle_eth_ud_smac_index(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp, u8 *smac,
1424 struct mlx4_qp_context *context)
1425 {
1426 u64 u64_mac;
1427 int smac_index;
1428
1429 u64_mac = atomic64_read(&dev->iboe.mac[qp->port - 1]);
1430
1431 context->pri_path.sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | ((qp->port - 1) << 6);
1432 if (!qp->pri.smac && !qp->pri.smac_port) {
1433 smac_index = mlx4_register_mac(dev->dev, qp->port, u64_mac);
1434 if (smac_index >= 0) {
1435 qp->pri.candidate_smac_index = smac_index;
1436 qp->pri.candidate_smac = u64_mac;
1437 qp->pri.candidate_smac_port = qp->port;
1438 context->pri_path.grh_mylmc = 0x80 | (u8) smac_index;
1439 } else {
1440 return -ENOENT;
1441 }
1442 }
1443 return 0;
1444 }
1445
1446 static int __mlx4_ib_modify_qp(struct ib_qp *ibqp,
1447 const struct ib_qp_attr *attr, int attr_mask,
1448 enum ib_qp_state cur_state, enum ib_qp_state new_state)
1449 {
1450 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
1451 struct mlx4_ib_qp *qp = to_mqp(ibqp);
1452 struct mlx4_ib_pd *pd;
1453 struct mlx4_ib_cq *send_cq, *recv_cq;
1454 struct mlx4_qp_context *context;
1455 enum mlx4_qp_optpar optpar = 0;
1456 int sqd_event;
1457 int steer_qp = 0;
1458 int err = -EINVAL;
1459
1460 /* APM is not supported under RoCE */
1461 if (attr_mask & IB_QP_ALT_PATH &&
1462 rdma_port_get_link_layer(&dev->ib_dev, qp->port) ==
1463 IB_LINK_LAYER_ETHERNET)
1464 return -ENOTSUPP;
1465
1466 context = kzalloc(sizeof *context, GFP_KERNEL);
1467 if (!context)
1468 return -ENOMEM;
1469
1470 context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) |
1471 (to_mlx4_st(dev, qp->mlx4_ib_qp_type) << 16));
1472
1473 if (!(attr_mask & IB_QP_PATH_MIG_STATE))
1474 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
1475 else {
1476 optpar |= MLX4_QP_OPTPAR_PM_STATE;
1477 switch (attr->path_mig_state) {
1478 case IB_MIG_MIGRATED:
1479 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
1480 break;
1481 case IB_MIG_REARM:
1482 context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11);
1483 break;
1484 case IB_MIG_ARMED:
1485 context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11);
1486 break;
1487 }
1488 }
1489
1490 if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI)
1491 context->mtu_msgmax = (IB_MTU_4096 << 5) | 11;
1492 else if (ibqp->qp_type == IB_QPT_RAW_PACKET)
1493 context->mtu_msgmax = (MLX4_RAW_QP_MTU << 5) | MLX4_RAW_QP_MSGMAX;
1494 else if (ibqp->qp_type == IB_QPT_UD) {
1495 if (qp->flags & MLX4_IB_QP_LSO)
1496 context->mtu_msgmax = (IB_MTU_4096 << 5) |
1497 ilog2(dev->dev->caps.max_gso_sz);
1498 else
1499 context->mtu_msgmax = (IB_MTU_4096 << 5) | 12;
1500 } else if (attr_mask & IB_QP_PATH_MTU) {
1501 if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) {
1502 pr_err("path MTU (%u) is invalid\n",
1503 attr->path_mtu);
1504 goto out;
1505 }
1506 context->mtu_msgmax = (attr->path_mtu << 5) |
1507 ilog2(dev->dev->caps.max_msg_sz);
1508 }
1509
1510 if (qp->rq.wqe_cnt)
1511 context->rq_size_stride = ilog2(qp->rq.wqe_cnt) << 3;
1512 context->rq_size_stride |= qp->rq.wqe_shift - 4;
1513
1514 if (qp->sq.wqe_cnt)
1515 context->sq_size_stride = ilog2(qp->sq.wqe_cnt) << 3;
1516 context->sq_size_stride |= qp->sq.wqe_shift - 4;
1517
1518 if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
1519 context->sq_size_stride |= !!qp->sq_no_prefetch << 7;
1520 context->xrcd = cpu_to_be32((u32) qp->xrcdn);
1521 if (ibqp->qp_type == IB_QPT_RAW_PACKET)
1522 context->param3 |= cpu_to_be32(1 << 30);
1523 }
1524
1525 if (qp->ibqp.uobject)
1526 context->usr_page = cpu_to_be32(to_mucontext(ibqp->uobject->context)->uar.index);
1527 else
1528 context->usr_page = cpu_to_be32(dev->priv_uar.index);
1529
1530 if (attr_mask & IB_QP_DEST_QPN)
1531 context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
1532
1533 if (attr_mask & IB_QP_PORT) {
1534 if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD &&
1535 !(attr_mask & IB_QP_AV)) {
1536 mlx4_set_sched(&context->pri_path, attr->port_num);
1537 optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE;
1538 }
1539 }
1540
1541 if (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) {
1542 if (dev->counters[qp->port - 1] != -1) {
1543 context->pri_path.counter_index =
1544 dev->counters[qp->port - 1];
1545 optpar |= MLX4_QP_OPTPAR_COUNTER_INDEX;
1546 } else
1547 context->pri_path.counter_index = 0xff;
1548
1549 if (qp->flags & MLX4_IB_QP_NETIF) {
1550 mlx4_ib_steer_qp_reg(dev, qp, 1);
1551 steer_qp = 1;
1552 }
1553 }
1554
1555 if (attr_mask & IB_QP_PKEY_INDEX) {
1556 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1557 context->pri_path.disable_pkey_check = 0x40;
1558 context->pri_path.pkey_index = attr->pkey_index;
1559 optpar |= MLX4_QP_OPTPAR_PKEY_INDEX;
1560 }
1561
1562 if (attr_mask & IB_QP_AV) {
1563 if (mlx4_set_path(dev, attr, attr_mask, qp, &context->pri_path,
1564 attr_mask & IB_QP_PORT ?
1565 attr->port_num : qp->port))
1566 goto out;
1567
1568 optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH |
1569 MLX4_QP_OPTPAR_SCHED_QUEUE);
1570 }
1571
1572 if (attr_mask & IB_QP_TIMEOUT) {
1573 context->pri_path.ackto |= attr->timeout << 3;
1574 optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT;
1575 }
1576
1577 if (attr_mask & IB_QP_ALT_PATH) {
1578 if (attr->alt_port_num == 0 ||
1579 attr->alt_port_num > dev->dev->caps.num_ports)
1580 goto out;
1581
1582 if (attr->alt_pkey_index >=
1583 dev->dev->caps.pkey_table_len[attr->alt_port_num])
1584 goto out;
1585
1586 if (mlx4_set_alt_path(dev, attr, attr_mask, qp,
1587 &context->alt_path,
1588 attr->alt_port_num))
1589 goto out;
1590
1591 context->alt_path.pkey_index = attr->alt_pkey_index;
1592 context->alt_path.ackto = attr->alt_timeout << 3;
1593 optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH;
1594 }
1595
1596 pd = get_pd(qp);
1597 get_cqs(qp, &send_cq, &recv_cq);
1598 context->pd = cpu_to_be32(pd->pdn);
1599 context->cqn_send = cpu_to_be32(send_cq->mcq.cqn);
1600 context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn);
1601 context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28);
1602
1603 /* Set "fast registration enabled" for all kernel QPs */
1604 if (!qp->ibqp.uobject)
1605 context->params1 |= cpu_to_be32(1 << 11);
1606
1607 if (attr_mask & IB_QP_RNR_RETRY) {
1608 context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
1609 optpar |= MLX4_QP_OPTPAR_RNR_RETRY;
1610 }
1611
1612 if (attr_mask & IB_QP_RETRY_CNT) {
1613 context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
1614 optpar |= MLX4_QP_OPTPAR_RETRY_COUNT;
1615 }
1616
1617 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1618 if (attr->max_rd_atomic)
1619 context->params1 |=
1620 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
1621 optpar |= MLX4_QP_OPTPAR_SRA_MAX;
1622 }
1623
1624 if (attr_mask & IB_QP_SQ_PSN)
1625 context->next_send_psn = cpu_to_be32(attr->sq_psn);
1626
1627 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1628 if (attr->max_dest_rd_atomic)
1629 context->params2 |=
1630 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
1631 optpar |= MLX4_QP_OPTPAR_RRA_MAX;
1632 }
1633
1634 if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) {
1635 context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask);
1636 optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE;
1637 }
1638
1639 if (ibqp->srq)
1640 context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC);
1641
1642 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
1643 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
1644 optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT;
1645 }
1646 if (attr_mask & IB_QP_RQ_PSN)
1647 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
1648
1649 /* proxy and tunnel qp qkeys will be changed in modify-qp wrappers */
1650 if (attr_mask & IB_QP_QKEY) {
1651 if (qp->mlx4_ib_qp_type &
1652 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))
1653 context->qkey = cpu_to_be32(IB_QP_SET_QKEY);
1654 else {
1655 if (mlx4_is_mfunc(dev->dev) &&
1656 !(qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) &&
1657 (attr->qkey & MLX4_RESERVED_QKEY_MASK) ==
1658 MLX4_RESERVED_QKEY_BASE) {
1659 pr_err("Cannot use reserved QKEY"
1660 " 0x%x (range 0xffff0000..0xffffffff"
1661 " is reserved)\n", attr->qkey);
1662 err = -EINVAL;
1663 goto out;
1664 }
1665 context->qkey = cpu_to_be32(attr->qkey);
1666 }
1667 optpar |= MLX4_QP_OPTPAR_Q_KEY;
1668 }
1669
1670 if (ibqp->srq)
1671 context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn);
1672
1673 if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1674 context->db_rec_addr = cpu_to_be64(qp->db.dma);
1675
1676 if (cur_state == IB_QPS_INIT &&
1677 new_state == IB_QPS_RTR &&
1678 (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
1679 ibqp->qp_type == IB_QPT_UD ||
1680 ibqp->qp_type == IB_QPT_RAW_PACKET)) {
1681 context->pri_path.sched_queue = (qp->port - 1) << 6;
1682 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
1683 qp->mlx4_ib_qp_type &
1684 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) {
1685 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE;
1686 if (qp->mlx4_ib_qp_type != MLX4_IB_QPT_SMI)
1687 context->pri_path.fl = 0x80;
1688 } else {
1689 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1690 context->pri_path.fl = 0x80;
1691 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE;
1692 }
1693 if (rdma_port_get_link_layer(&dev->ib_dev, qp->port) ==
1694 IB_LINK_LAYER_ETHERNET) {
1695 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI ||
1696 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI)
1697 context->pri_path.feup = 1 << 7; /* don't fsm */
1698 /* handle smac_index */
1699 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_UD ||
1700 qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI ||
1701 qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI) {
1702 err = handle_eth_ud_smac_index(dev, qp, (u8 *)attr->smac, context);
1703 if (err) {
1704 err = -EINVAL;
1705 goto out;
1706 }
1707 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI)
1708 dev->qp1_proxy[qp->port - 1] = qp;
1709 }
1710 }
1711 }
1712
1713 if (qp->ibqp.qp_type == IB_QPT_RAW_PACKET) {
1714 context->pri_path.ackto = (context->pri_path.ackto & 0xf8) |
1715 MLX4_IB_LINK_TYPE_ETH;
1716 if (dev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
1717 /* set QP to receive both tunneled & non-tunneled packets */
1718 if (!(context->flags & cpu_to_be32(1 << MLX4_RSS_QPC_FLAG_OFFSET)))
1719 context->srqn = cpu_to_be32(7 << 28);
1720 }
1721 }
1722
1723 if (ibqp->qp_type == IB_QPT_UD && (new_state == IB_QPS_RTR)) {
1724 int is_eth = rdma_port_get_link_layer(
1725 &dev->ib_dev, qp->port) ==
1726 IB_LINK_LAYER_ETHERNET;
1727 if (is_eth) {
1728 context->pri_path.ackto = MLX4_IB_LINK_TYPE_ETH;
1729 optpar |= MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH;
1730 }
1731 }
1732
1733
1734 if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD &&
1735 attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
1736 sqd_event = 1;
1737 else
1738 sqd_event = 0;
1739
1740 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1741 context->rlkey |= (1 << 4);
1742
1743 /*
1744 * Before passing a kernel QP to the HW, make sure that the
1745 * ownership bits of the send queue are set and the SQ
1746 * headroom is stamped so that the hardware doesn't start
1747 * processing stale work requests.
1748 */
1749 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
1750 struct mlx4_wqe_ctrl_seg *ctrl;
1751 int i;
1752
1753 for (i = 0; i < qp->sq.wqe_cnt; ++i) {
1754 ctrl = get_send_wqe(qp, i);
1755 ctrl->owner_opcode = cpu_to_be32(1 << 31);
1756 if (qp->sq_max_wqes_per_wr == 1)
1757 ctrl->fence_size = 1 << (qp->sq.wqe_shift - 4);
1758
1759 stamp_send_wqe(qp, i, 1 << qp->sq.wqe_shift);
1760 }
1761 }
1762
1763 err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state),
1764 to_mlx4_state(new_state), context, optpar,
1765 sqd_event, &qp->mqp);
1766 if (err)
1767 goto out;
1768
1769 qp->state = new_state;
1770
1771 if (attr_mask & IB_QP_ACCESS_FLAGS)
1772 qp->atomic_rd_en = attr->qp_access_flags;
1773 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1774 qp->resp_depth = attr->max_dest_rd_atomic;
1775 if (attr_mask & IB_QP_PORT) {
1776 qp->port = attr->port_num;
1777 update_mcg_macs(dev, qp);
1778 }
1779 if (attr_mask & IB_QP_ALT_PATH)
1780 qp->alt_port = attr->alt_port_num;
1781
1782 if (is_sqp(dev, qp))
1783 store_sqp_attrs(to_msqp(qp), attr, attr_mask);
1784
1785 /*
1786 * If we moved QP0 to RTR, bring the IB link up; if we moved
1787 * QP0 to RESET or ERROR, bring the link back down.
1788 */
1789 if (is_qp0(dev, qp)) {
1790 if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR)
1791 if (mlx4_INIT_PORT(dev->dev, qp->port))
1792 pr_warn("INIT_PORT failed for port %d\n",
1793 qp->port);
1794
1795 if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR &&
1796 (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR))
1797 mlx4_CLOSE_PORT(dev->dev, qp->port);
1798 }
1799
1800 /*
1801 * If we moved a kernel QP to RESET, clean up all old CQ
1802 * entries and reinitialize the QP.
1803 */
1804 if (new_state == IB_QPS_RESET) {
1805 if (!ibqp->uobject) {
1806 mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
1807 ibqp->srq ? to_msrq(ibqp->srq) : NULL);
1808 if (send_cq != recv_cq)
1809 mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1810
1811 qp->rq.head = 0;
1812 qp->rq.tail = 0;
1813 qp->sq.head = 0;
1814 qp->sq.tail = 0;
1815 qp->sq_next_wqe = 0;
1816 if (qp->rq.wqe_cnt)
1817 *qp->db.db = 0;
1818
1819 if (qp->flags & MLX4_IB_QP_NETIF)
1820 mlx4_ib_steer_qp_reg(dev, qp, 0);
1821 }
1822 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) {
1823 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
1824 qp->pri.smac = 0;
1825 qp->pri.smac_port = 0;
1826 }
1827 if (qp->alt.smac) {
1828 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
1829 qp->alt.smac = 0;
1830 }
1831 if (qp->pri.vid < 0x1000) {
1832 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid);
1833 qp->pri.vid = 0xFFFF;
1834 qp->pri.candidate_vid = 0xFFFF;
1835 qp->pri.update_vid = 0;
1836 }
1837
1838 if (qp->alt.vid < 0x1000) {
1839 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid);
1840 qp->alt.vid = 0xFFFF;
1841 qp->alt.candidate_vid = 0xFFFF;
1842 qp->alt.update_vid = 0;
1843 }
1844 }
1845 out:
1846 if (err && steer_qp)
1847 mlx4_ib_steer_qp_reg(dev, qp, 0);
1848 kfree(context);
1849 if (qp->pri.candidate_smac ||
1850 (!qp->pri.candidate_smac && qp->pri.candidate_smac_port)) {
1851 if (err) {
1852 mlx4_unregister_mac(dev->dev, qp->pri.candidate_smac_port, qp->pri.candidate_smac);
1853 } else {
1854 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port))
1855 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
1856 qp->pri.smac = qp->pri.candidate_smac;
1857 qp->pri.smac_index = qp->pri.candidate_smac_index;
1858 qp->pri.smac_port = qp->pri.candidate_smac_port;
1859 }
1860 qp->pri.candidate_smac = 0;
1861 qp->pri.candidate_smac_index = 0;
1862 qp->pri.candidate_smac_port = 0;
1863 }
1864 if (qp->alt.candidate_smac) {
1865 if (err) {
1866 mlx4_unregister_mac(dev->dev, qp->alt.candidate_smac_port, qp->alt.candidate_smac);
1867 } else {
1868 if (qp->alt.smac)
1869 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
1870 qp->alt.smac = qp->alt.candidate_smac;
1871 qp->alt.smac_index = qp->alt.candidate_smac_index;
1872 qp->alt.smac_port = qp->alt.candidate_smac_port;
1873 }
1874 qp->alt.candidate_smac = 0;
1875 qp->alt.candidate_smac_index = 0;
1876 qp->alt.candidate_smac_port = 0;
1877 }
1878
1879 if (qp->pri.update_vid) {
1880 if (err) {
1881 if (qp->pri.candidate_vid < 0x1000)
1882 mlx4_unregister_vlan(dev->dev, qp->pri.candidate_vlan_port,
1883 qp->pri.candidate_vid);
1884 } else {
1885 if (qp->pri.vid < 0x1000)
1886 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port,
1887 qp->pri.vid);
1888 qp->pri.vid = qp->pri.candidate_vid;
1889 qp->pri.vlan_port = qp->pri.candidate_vlan_port;
1890 qp->pri.vlan_index = qp->pri.candidate_vlan_index;
1891 }
1892 qp->pri.candidate_vid = 0xFFFF;
1893 qp->pri.update_vid = 0;
1894 }
1895
1896 if (qp->alt.update_vid) {
1897 if (err) {
1898 if (qp->alt.candidate_vid < 0x1000)
1899 mlx4_unregister_vlan(dev->dev, qp->alt.candidate_vlan_port,
1900 qp->alt.candidate_vid);
1901 } else {
1902 if (qp->alt.vid < 0x1000)
1903 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port,
1904 qp->alt.vid);
1905 qp->alt.vid = qp->alt.candidate_vid;
1906 qp->alt.vlan_port = qp->alt.candidate_vlan_port;
1907 qp->alt.vlan_index = qp->alt.candidate_vlan_index;
1908 }
1909 qp->alt.candidate_vid = 0xFFFF;
1910 qp->alt.update_vid = 0;
1911 }
1912
1913 return err;
1914 }
1915
1916 int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1917 int attr_mask, struct ib_udata *udata)
1918 {
1919 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
1920 struct mlx4_ib_qp *qp = to_mqp(ibqp);
1921 enum ib_qp_state cur_state, new_state;
1922 int err = -EINVAL;
1923 int ll;
1924 mutex_lock(&qp->mutex);
1925
1926 cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
1927 new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
1928
1929 if (cur_state == new_state && cur_state == IB_QPS_RESET) {
1930 ll = IB_LINK_LAYER_UNSPECIFIED;
1931 } else {
1932 int port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1933 ll = rdma_port_get_link_layer(&dev->ib_dev, port);
1934 }
1935
1936 if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
1937 attr_mask, ll)) {
1938 pr_debug("qpn 0x%x: invalid attribute mask specified "
1939 "for transition %d to %d. qp_type %d,"
1940 " attr_mask 0x%x\n",
1941 ibqp->qp_num, cur_state, new_state,
1942 ibqp->qp_type, attr_mask);
1943 goto out;
1944 }
1945
1946 if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT)) {
1947 if ((cur_state == IB_QPS_RESET) && (new_state == IB_QPS_INIT)) {
1948 if ((ibqp->qp_type == IB_QPT_RC) ||
1949 (ibqp->qp_type == IB_QPT_UD) ||
1950 (ibqp->qp_type == IB_QPT_UC) ||
1951 (ibqp->qp_type == IB_QPT_RAW_PACKET) ||
1952 (ibqp->qp_type == IB_QPT_XRC_INI)) {
1953 attr->port_num = mlx4_ib_bond_next_port(dev);
1954 }
1955 } else {
1956 /* no sense in changing port_num
1957 * when ports are bonded */
1958 attr_mask &= ~IB_QP_PORT;
1959 }
1960 }
1961
1962 if ((attr_mask & IB_QP_PORT) &&
1963 (attr->port_num == 0 || attr->port_num > dev->num_ports)) {
1964 pr_debug("qpn 0x%x: invalid port number (%d) specified "
1965 "for transition %d to %d. qp_type %d\n",
1966 ibqp->qp_num, attr->port_num, cur_state,
1967 new_state, ibqp->qp_type);
1968 goto out;
1969 }
1970
1971 if ((attr_mask & IB_QP_PORT) && (ibqp->qp_type == IB_QPT_RAW_PACKET) &&
1972 (rdma_port_get_link_layer(&dev->ib_dev, attr->port_num) !=
1973 IB_LINK_LAYER_ETHERNET))
1974 goto out;
1975
1976 if (attr_mask & IB_QP_PKEY_INDEX) {
1977 int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1978 if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) {
1979 pr_debug("qpn 0x%x: invalid pkey index (%d) specified "
1980 "for transition %d to %d. qp_type %d\n",
1981 ibqp->qp_num, attr->pkey_index, cur_state,
1982 new_state, ibqp->qp_type);
1983 goto out;
1984 }
1985 }
1986
1987 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
1988 attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) {
1989 pr_debug("qpn 0x%x: max_rd_atomic (%d) too large. "
1990 "Transition %d to %d. qp_type %d\n",
1991 ibqp->qp_num, attr->max_rd_atomic, cur_state,
1992 new_state, ibqp->qp_type);
1993 goto out;
1994 }
1995
1996 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
1997 attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) {
1998 pr_debug("qpn 0x%x: max_dest_rd_atomic (%d) too large. "
1999 "Transition %d to %d. qp_type %d\n",
2000 ibqp->qp_num, attr->max_dest_rd_atomic, cur_state,
2001 new_state, ibqp->qp_type);
2002 goto out;
2003 }
2004
2005 if (cur_state == new_state && cur_state == IB_QPS_RESET) {
2006 err = 0;
2007 goto out;
2008 }
2009
2010 err = __mlx4_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state);
2011
2012 if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT))
2013 attr->port_num = 1;
2014
2015 out:
2016 mutex_unlock(&qp->mutex);
2017 return err;
2018 }
2019
2020 static int vf_get_qp0_qkey(struct mlx4_dev *dev, int qpn, u32 *qkey)
2021 {
2022 int i;
2023 for (i = 0; i < dev->caps.num_ports; i++) {
2024 if (qpn == dev->caps.qp0_proxy[i] ||
2025 qpn == dev->caps.qp0_tunnel[i]) {
2026 *qkey = dev->caps.qp0_qkey[i];
2027 return 0;
2028 }
2029 }
2030 return -EINVAL;
2031 }
2032
2033 static int build_sriov_qp0_header(struct mlx4_ib_sqp *sqp,
2034 struct ib_send_wr *wr,
2035 void *wqe, unsigned *mlx_seg_len)
2036 {
2037 struct mlx4_ib_dev *mdev = to_mdev(sqp->qp.ibqp.device);
2038 struct ib_device *ib_dev = &mdev->ib_dev;
2039 struct mlx4_wqe_mlx_seg *mlx = wqe;
2040 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
2041 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2042 u16 pkey;
2043 u32 qkey;
2044 int send_size;
2045 int header_size;
2046 int spc;
2047 int i;
2048
2049 if (wr->opcode != IB_WR_SEND)
2050 return -EINVAL;
2051
2052 send_size = 0;
2053
2054 for (i = 0; i < wr->num_sge; ++i)
2055 send_size += wr->sg_list[i].length;
2056
2057 /* for proxy-qp0 sends, need to add in size of tunnel header */
2058 /* for tunnel-qp0 sends, tunnel header is already in s/g list */
2059 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER)
2060 send_size += sizeof (struct mlx4_ib_tunnel_header);
2061
2062 ib_ud_header_init(send_size, 1, 0, 0, 0, 0, &sqp->ud_header);
2063
2064 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) {
2065 sqp->ud_header.lrh.service_level =
2066 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
2067 sqp->ud_header.lrh.destination_lid =
2068 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2069 sqp->ud_header.lrh.source_lid =
2070 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2071 }
2072
2073 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
2074
2075 /* force loopback */
2076 mlx->flags |= cpu_to_be32(MLX4_WQE_MLX_VL15 | 0x1 | MLX4_WQE_MLX_SLR);
2077 mlx->rlid = sqp->ud_header.lrh.destination_lid;
2078
2079 sqp->ud_header.lrh.virtual_lane = 0;
2080 sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
2081 ib_get_cached_pkey(ib_dev, sqp->qp.port, 0, &pkey);
2082 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
2083 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_TUN_SMI_OWNER)
2084 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2085 else
2086 sqp->ud_header.bth.destination_qpn =
2087 cpu_to_be32(mdev->dev->caps.qp0_tunnel[sqp->qp.port - 1]);
2088
2089 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
2090 if (mlx4_is_master(mdev->dev)) {
2091 if (mlx4_get_parav_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
2092 return -EINVAL;
2093 } else {
2094 if (vf_get_qp0_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
2095 return -EINVAL;
2096 }
2097 sqp->ud_header.deth.qkey = cpu_to_be32(qkey);
2098 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.mqp.qpn);
2099
2100 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
2101 sqp->ud_header.immediate_present = 0;
2102
2103 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
2104
2105 /*
2106 * Inline data segments may not cross a 64 byte boundary. If
2107 * our UD header is bigger than the space available up to the
2108 * next 64 byte boundary in the WQE, use two inline data
2109 * segments to hold the UD header.
2110 */
2111 spc = MLX4_INLINE_ALIGN -
2112 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2113 if (header_size <= spc) {
2114 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
2115 memcpy(inl + 1, sqp->header_buf, header_size);
2116 i = 1;
2117 } else {
2118 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2119 memcpy(inl + 1, sqp->header_buf, spc);
2120
2121 inl = (void *) (inl + 1) + spc;
2122 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
2123 /*
2124 * Need a barrier here to make sure all the data is
2125 * visible before the byte_count field is set.
2126 * Otherwise the HCA prefetcher could grab the 64-byte
2127 * chunk with this inline segment and get a valid (!=
2128 * 0xffffffff) byte count but stale data, and end up
2129 * generating a packet with bad headers.
2130 *
2131 * The first inline segment's byte_count field doesn't
2132 * need a barrier, because it comes after a
2133 * control/MLX segment and therefore is at an offset
2134 * of 16 mod 64.
2135 */
2136 wmb();
2137 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
2138 i = 2;
2139 }
2140
2141 *mlx_seg_len =
2142 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
2143 return 0;
2144 }
2145
2146 static void mlx4_u64_to_smac(u8 *dst_mac, u64 src_mac)
2147 {
2148 int i;
2149
2150 for (i = ETH_ALEN; i; i--) {
2151 dst_mac[i - 1] = src_mac & 0xff;
2152 src_mac >>= 8;
2153 }
2154 }
2155
2156 static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
2157 void *wqe, unsigned *mlx_seg_len)
2158 {
2159 struct ib_device *ib_dev = sqp->qp.ibqp.device;
2160 struct mlx4_wqe_mlx_seg *mlx = wqe;
2161 struct mlx4_wqe_ctrl_seg *ctrl = wqe;
2162 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
2163 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2164 union ib_gid sgid;
2165 u16 pkey;
2166 int send_size;
2167 int header_size;
2168 int spc;
2169 int i;
2170 int err = 0;
2171 u16 vlan = 0xffff;
2172 bool is_eth;
2173 bool is_vlan = false;
2174 bool is_grh;
2175
2176 send_size = 0;
2177 for (i = 0; i < wr->num_sge; ++i)
2178 send_size += wr->sg_list[i].length;
2179
2180 is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET;
2181 is_grh = mlx4_ib_ah_grh_present(ah);
2182 if (is_eth) {
2183 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2184 /* When multi-function is enabled, the ib_core gid
2185 * indexes don't necessarily match the hw ones, so
2186 * we must use our own cache */
2187 err = mlx4_get_roce_gid_from_slave(to_mdev(ib_dev)->dev,
2188 be32_to_cpu(ah->av.ib.port_pd) >> 24,
2189 ah->av.ib.gid_index, &sgid.raw[0]);
2190 if (err)
2191 return err;
2192 } else {
2193 err = ib_get_cached_gid(ib_dev,
2194 be32_to_cpu(ah->av.ib.port_pd) >> 24,
2195 ah->av.ib.gid_index, &sgid);
2196 if (err)
2197 return err;
2198 }
2199
2200 if (ah->av.eth.vlan != cpu_to_be16(0xffff)) {
2201 vlan = be16_to_cpu(ah->av.eth.vlan) & 0x0fff;
2202 is_vlan = 1;
2203 }
2204 }
2205 ib_ud_header_init(send_size, !is_eth, is_eth, is_vlan, is_grh, 0, &sqp->ud_header);
2206
2207 if (!is_eth) {
2208 sqp->ud_header.lrh.service_level =
2209 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
2210 sqp->ud_header.lrh.destination_lid = ah->av.ib.dlid;
2211 sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2212 }
2213
2214 if (is_grh) {
2215 sqp->ud_header.grh.traffic_class =
2216 (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff;
2217 sqp->ud_header.grh.flow_label =
2218 ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
2219 sqp->ud_header.grh.hop_limit = ah->av.ib.hop_limit;
2220 if (is_eth)
2221 memcpy(sqp->ud_header.grh.source_gid.raw, sgid.raw, 16);
2222 else {
2223 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2224 /* When multi-function is enabled, the ib_core gid
2225 * indexes don't necessarily match the hw ones, so
2226 * we must use our own cache */
2227 sqp->ud_header.grh.source_gid.global.subnet_prefix =
2228 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
2229 subnet_prefix;
2230 sqp->ud_header.grh.source_gid.global.interface_id =
2231 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
2232 guid_cache[ah->av.ib.gid_index];
2233 } else
2234 ib_get_cached_gid(ib_dev,
2235 be32_to_cpu(ah->av.ib.port_pd) >> 24,
2236 ah->av.ib.gid_index,
2237 &sqp->ud_header.grh.source_gid);
2238 }
2239 memcpy(sqp->ud_header.grh.destination_gid.raw,
2240 ah->av.ib.dgid, 16);
2241 }
2242
2243 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
2244
2245 if (!is_eth) {
2246 mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) |
2247 (sqp->ud_header.lrh.destination_lid ==
2248 IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) |
2249 (sqp->ud_header.lrh.service_level << 8));
2250 if (ah->av.ib.port_pd & cpu_to_be32(0x80000000))
2251 mlx->flags |= cpu_to_be32(0x1); /* force loopback */
2252 mlx->rlid = sqp->ud_header.lrh.destination_lid;
2253 }
2254
2255 switch (wr->opcode) {
2256 case IB_WR_SEND:
2257 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
2258 sqp->ud_header.immediate_present = 0;
2259 break;
2260 case IB_WR_SEND_WITH_IMM:
2261 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
2262 sqp->ud_header.immediate_present = 1;
2263 sqp->ud_header.immediate_data = wr->ex.imm_data;
2264 break;
2265 default:
2266 return -EINVAL;
2267 }
2268
2269 if (is_eth) {
2270 struct in6_addr in6;
2271
2272 u16 pcp = (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 29) << 13;
2273
2274 mlx->sched_prio = cpu_to_be16(pcp);
2275
2276 memcpy(sqp->ud_header.eth.dmac_h, ah->av.eth.mac, 6);
2277 /* FIXME: cache smac value? */
2278 memcpy(&ctrl->srcrb_flags16[0], ah->av.eth.mac, 2);
2279 memcpy(&ctrl->imm, ah->av.eth.mac + 2, 4);
2280 memcpy(&in6, sgid.raw, sizeof(in6));
2281
2282 if (!mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2283 u64 mac = atomic64_read(&to_mdev(ib_dev)->iboe.mac[sqp->qp.port - 1]);
2284 u8 smac[ETH_ALEN];
2285
2286 mlx4_u64_to_smac(smac, mac);
2287 memcpy(sqp->ud_header.eth.smac_h, smac, ETH_ALEN);
2288 } else {
2289 /* use the src mac of the tunnel */
2290 memcpy(sqp->ud_header.eth.smac_h, ah->av.eth.s_mac, ETH_ALEN);
2291 }
2292
2293 if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6))
2294 mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
2295 if (!is_vlan) {
2296 sqp->ud_header.eth.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
2297 } else {
2298 sqp->ud_header.vlan.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
2299 sqp->ud_header.vlan.tag = cpu_to_be16(vlan | pcp);
2300 }
2301 } else {
2302 sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0;
2303 if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
2304 sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
2305 }
2306 sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
2307 if (!sqp->qp.ibqp.qp_num)
2308 ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey);
2309 else
2310 ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey);
2311 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
2312 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2313 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
2314 sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
2315 sqp->qkey : wr->wr.ud.remote_qkey);
2316 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
2317
2318 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
2319
2320 if (0) {
2321 pr_err("built UD header of size %d:\n", header_size);
2322 for (i = 0; i < header_size / 4; ++i) {
2323 if (i % 8 == 0)
2324 pr_err(" [%02x] ", i * 4);
2325 pr_cont(" %08x",
2326 be32_to_cpu(((__be32 *) sqp->header_buf)[i]));
2327 if ((i + 1) % 8 == 0)
2328 pr_cont("\n");
2329 }
2330 pr_err("\n");
2331 }
2332
2333 /*
2334 * Inline data segments may not cross a 64 byte boundary. If
2335 * our UD header is bigger than the space available up to the
2336 * next 64 byte boundary in the WQE, use two inline data
2337 * segments to hold the UD header.
2338 */
2339 spc = MLX4_INLINE_ALIGN -
2340 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2341 if (header_size <= spc) {
2342 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
2343 memcpy(inl + 1, sqp->header_buf, header_size);
2344 i = 1;
2345 } else {
2346 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2347 memcpy(inl + 1, sqp->header_buf, spc);
2348
2349 inl = (void *) (inl + 1) + spc;
2350 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
2351 /*
2352 * Need a barrier here to make sure all the data is
2353 * visible before the byte_count field is set.
2354 * Otherwise the HCA prefetcher could grab the 64-byte
2355 * chunk with this inline segment and get a valid (!=
2356 * 0xffffffff) byte count but stale data, and end up
2357 * generating a packet with bad headers.
2358 *
2359 * The first inline segment's byte_count field doesn't
2360 * need a barrier, because it comes after a
2361 * control/MLX segment and therefore is at an offset
2362 * of 16 mod 64.
2363 */
2364 wmb();
2365 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
2366 i = 2;
2367 }
2368
2369 *mlx_seg_len =
2370 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
2371 return 0;
2372 }
2373
2374 static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
2375 {
2376 unsigned cur;
2377 struct mlx4_ib_cq *cq;
2378
2379 cur = wq->head - wq->tail;
2380 if (likely(cur + nreq < wq->max_post))
2381 return 0;
2382
2383 cq = to_mcq(ib_cq);
2384 spin_lock(&cq->lock);
2385 cur = wq->head - wq->tail;
2386 spin_unlock(&cq->lock);
2387
2388 return cur + nreq >= wq->max_post;
2389 }
2390
2391 static __be32 convert_access(int acc)
2392 {
2393 return (acc & IB_ACCESS_REMOTE_ATOMIC ?
2394 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC) : 0) |
2395 (acc & IB_ACCESS_REMOTE_WRITE ?
2396 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE) : 0) |
2397 (acc & IB_ACCESS_REMOTE_READ ?
2398 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ) : 0) |
2399 (acc & IB_ACCESS_LOCAL_WRITE ? cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_WRITE) : 0) |
2400 cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_READ);
2401 }
2402
2403 static void set_fmr_seg(struct mlx4_wqe_fmr_seg *fseg, struct ib_send_wr *wr)
2404 {
2405 struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(wr->wr.fast_reg.page_list);
2406 int i;
2407
2408 for (i = 0; i < wr->wr.fast_reg.page_list_len; ++i)
2409 mfrpl->mapped_page_list[i] =
2410 cpu_to_be64(wr->wr.fast_reg.page_list->page_list[i] |
2411 MLX4_MTT_FLAG_PRESENT);
2412
2413 fseg->flags = convert_access(wr->wr.fast_reg.access_flags);
2414 fseg->mem_key = cpu_to_be32(wr->wr.fast_reg.rkey);
2415 fseg->buf_list = cpu_to_be64(mfrpl->map);
2416 fseg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start);
2417 fseg->reg_len = cpu_to_be64(wr->wr.fast_reg.length);
2418 fseg->offset = 0; /* XXX -- is this just for ZBVA? */
2419 fseg->page_size = cpu_to_be32(wr->wr.fast_reg.page_shift);
2420 fseg->reserved[0] = 0;
2421 fseg->reserved[1] = 0;
2422 }
2423
2424 static void set_bind_seg(struct mlx4_wqe_bind_seg *bseg, struct ib_send_wr *wr)
2425 {
2426 bseg->flags1 =
2427 convert_access(wr->wr.bind_mw.bind_info.mw_access_flags) &
2428 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ |
2429 MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE |
2430 MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC);
2431 bseg->flags2 = 0;
2432 if (wr->wr.bind_mw.mw->type == IB_MW_TYPE_2)
2433 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_TYPE_2);
2434 if (wr->wr.bind_mw.bind_info.mw_access_flags & IB_ZERO_BASED)
2435 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_ZERO_BASED);
2436 bseg->new_rkey = cpu_to_be32(wr->wr.bind_mw.rkey);
2437 bseg->lkey = cpu_to_be32(wr->wr.bind_mw.bind_info.mr->lkey);
2438 bseg->addr = cpu_to_be64(wr->wr.bind_mw.bind_info.addr);
2439 bseg->length = cpu_to_be64(wr->wr.bind_mw.bind_info.length);
2440 }
2441
2442 static void set_local_inv_seg(struct mlx4_wqe_local_inval_seg *iseg, u32 rkey)
2443 {
2444 memset(iseg, 0, sizeof(*iseg));
2445 iseg->mem_key = cpu_to_be32(rkey);
2446 }
2447
2448 static __always_inline void set_raddr_seg(struct mlx4_wqe_raddr_seg *rseg,
2449 u64 remote_addr, u32 rkey)
2450 {
2451 rseg->raddr = cpu_to_be64(remote_addr);
2452 rseg->rkey = cpu_to_be32(rkey);
2453 rseg->reserved = 0;
2454 }
2455
2456 static void set_atomic_seg(struct mlx4_wqe_atomic_seg *aseg, struct ib_send_wr *wr)
2457 {
2458 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
2459 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
2460 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
2461 } else if (wr->opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) {
2462 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2463 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2464 } else {
2465 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2466 aseg->compare = 0;
2467 }
2468
2469 }
2470
2471 static void set_masked_atomic_seg(struct mlx4_wqe_masked_atomic_seg *aseg,
2472 struct ib_send_wr *wr)
2473 {
2474 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
2475 aseg->swap_add_mask = cpu_to_be64(wr->wr.atomic.swap_mask);
2476 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
2477 aseg->compare_mask = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2478 }
2479
2480 static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg,
2481 struct ib_send_wr *wr)
2482 {
2483 memcpy(dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av));
2484 dseg->dqpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2485 dseg->qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2486 dseg->vlan = to_mah(wr->wr.ud.ah)->av.eth.vlan;
2487 memcpy(dseg->mac, to_mah(wr->wr.ud.ah)->av.eth.mac, 6);
2488 }
2489
2490 static void set_tunnel_datagram_seg(struct mlx4_ib_dev *dev,
2491 struct mlx4_wqe_datagram_seg *dseg,
2492 struct ib_send_wr *wr,
2493 enum mlx4_ib_qp_type qpt)
2494 {
2495 union mlx4_ext_av *av = &to_mah(wr->wr.ud.ah)->av;
2496 struct mlx4_av sqp_av = {0};
2497 int port = *((u8 *) &av->ib.port_pd) & 0x3;
2498
2499 /* force loopback */
2500 sqp_av.port_pd = av->ib.port_pd | cpu_to_be32(0x80000000);
2501 sqp_av.g_slid = av->ib.g_slid & 0x7f; /* no GRH */
2502 sqp_av.sl_tclass_flowlabel = av->ib.sl_tclass_flowlabel &
2503 cpu_to_be32(0xf0000000);
2504
2505 memcpy(dseg->av, &sqp_av, sizeof (struct mlx4_av));
2506 if (qpt == MLX4_IB_QPT_PROXY_GSI)
2507 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp1_tunnel[port - 1]);
2508 else
2509 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp0_tunnel[port - 1]);
2510 /* Use QKEY from the QP context, which is set by master */
2511 dseg->qkey = cpu_to_be32(IB_QP_SET_QKEY);
2512 }
2513
2514 static void build_tunnel_header(struct ib_send_wr *wr, void *wqe, unsigned *mlx_seg_len)
2515 {
2516 struct mlx4_wqe_inline_seg *inl = wqe;
2517 struct mlx4_ib_tunnel_header hdr;
2518 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2519 int spc;
2520 int i;
2521
2522 memcpy(&hdr.av, &ah->av, sizeof hdr.av);
2523 hdr.remote_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2524 hdr.pkey_index = cpu_to_be16(wr->wr.ud.pkey_index);
2525 hdr.qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2526 memcpy(hdr.mac, ah->av.eth.mac, 6);
2527 hdr.vlan = ah->av.eth.vlan;
2528
2529 spc = MLX4_INLINE_ALIGN -
2530 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2531 if (sizeof (hdr) <= spc) {
2532 memcpy(inl + 1, &hdr, sizeof (hdr));
2533 wmb();
2534 inl->byte_count = cpu_to_be32(1 << 31 | sizeof (hdr));
2535 i = 1;
2536 } else {
2537 memcpy(inl + 1, &hdr, spc);
2538 wmb();
2539 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2540
2541 inl = (void *) (inl + 1) + spc;
2542 memcpy(inl + 1, (void *) &hdr + spc, sizeof (hdr) - spc);
2543 wmb();
2544 inl->byte_count = cpu_to_be32(1 << 31 | (sizeof (hdr) - spc));
2545 i = 2;
2546 }
2547
2548 *mlx_seg_len =
2549 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + sizeof (hdr), 16);
2550 }
2551
2552 static void set_mlx_icrc_seg(void *dseg)
2553 {
2554 u32 *t = dseg;
2555 struct mlx4_wqe_inline_seg *iseg = dseg;
2556
2557 t[1] = 0;
2558
2559 /*
2560 * Need a barrier here before writing the byte_count field to
2561 * make sure that all the data is visible before the
2562 * byte_count field is set. Otherwise, if the segment begins
2563 * a new cacheline, the HCA prefetcher could grab the 64-byte
2564 * chunk and get a valid (!= * 0xffffffff) byte count but
2565 * stale data, and end up sending the wrong data.
2566 */
2567 wmb();
2568
2569 iseg->byte_count = cpu_to_be32((1 << 31) | 4);
2570 }
2571
2572 static void set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2573 {
2574 dseg->lkey = cpu_to_be32(sg->lkey);
2575 dseg->addr = cpu_to_be64(sg->addr);
2576
2577 /*
2578 * Need a barrier here before writing the byte_count field to
2579 * make sure that all the data is visible before the
2580 * byte_count field is set. Otherwise, if the segment begins
2581 * a new cacheline, the HCA prefetcher could grab the 64-byte
2582 * chunk and get a valid (!= * 0xffffffff) byte count but
2583 * stale data, and end up sending the wrong data.
2584 */
2585 wmb();
2586
2587 dseg->byte_count = cpu_to_be32(sg->length);
2588 }
2589
2590 static void __set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2591 {
2592 dseg->byte_count = cpu_to_be32(sg->length);
2593 dseg->lkey = cpu_to_be32(sg->lkey);
2594 dseg->addr = cpu_to_be64(sg->addr);
2595 }
2596
2597 static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe, struct ib_send_wr *wr,
2598 struct mlx4_ib_qp *qp, unsigned *lso_seg_len,
2599 __be32 *lso_hdr_sz, __be32 *blh)
2600 {
2601 unsigned halign = ALIGN(sizeof *wqe + wr->wr.ud.hlen, 16);
2602
2603 if (unlikely(halign > MLX4_IB_CACHE_LINE_SIZE))
2604 *blh = cpu_to_be32(1 << 6);
2605
2606 if (unlikely(!(qp->flags & MLX4_IB_QP_LSO) &&
2607 wr->num_sge > qp->sq.max_gs - (halign >> 4)))
2608 return -EINVAL;
2609
2610 memcpy(wqe->header, wr->wr.ud.header, wr->wr.ud.hlen);
2611
2612 *lso_hdr_sz = cpu_to_be32(wr->wr.ud.mss << 16 | wr->wr.ud.hlen);
2613 *lso_seg_len = halign;
2614 return 0;
2615 }
2616
2617 static __be32 send_ieth(struct ib_send_wr *wr)
2618 {
2619 switch (wr->opcode) {
2620 case IB_WR_SEND_WITH_IMM:
2621 case IB_WR_RDMA_WRITE_WITH_IMM:
2622 return wr->ex.imm_data;
2623
2624 case IB_WR_SEND_WITH_INV:
2625 return cpu_to_be32(wr->ex.invalidate_rkey);
2626
2627 default:
2628 return 0;
2629 }
2630 }
2631
2632 static void add_zero_len_inline(void *wqe)
2633 {
2634 struct mlx4_wqe_inline_seg *inl = wqe;
2635 memset(wqe, 0, 16);
2636 inl->byte_count = cpu_to_be32(1 << 31);
2637 }
2638
2639 int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
2640 struct ib_send_wr **bad_wr)
2641 {
2642 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2643 void *wqe;
2644 struct mlx4_wqe_ctrl_seg *ctrl;
2645 struct mlx4_wqe_data_seg *dseg;
2646 unsigned long flags;
2647 int nreq;
2648 int err = 0;
2649 unsigned ind;
2650 int uninitialized_var(stamp);
2651 int uninitialized_var(size);
2652 unsigned uninitialized_var(seglen);
2653 __be32 dummy;
2654 __be32 *lso_wqe;
2655 __be32 uninitialized_var(lso_hdr_sz);
2656 __be32 blh;
2657 int i;
2658 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
2659
2660 spin_lock_irqsave(&qp->sq.lock, flags);
2661 if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) {
2662 err = -EIO;
2663 *bad_wr = wr;
2664 nreq = 0;
2665 goto out;
2666 }
2667
2668 ind = qp->sq_next_wqe;
2669
2670 for (nreq = 0; wr; ++nreq, wr = wr->next) {
2671 lso_wqe = &dummy;
2672 blh = 0;
2673
2674 if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
2675 err = -ENOMEM;
2676 *bad_wr = wr;
2677 goto out;
2678 }
2679
2680 if (unlikely(wr->num_sge > qp->sq.max_gs)) {
2681 err = -EINVAL;
2682 *bad_wr = wr;
2683 goto out;
2684 }
2685
2686 ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
2687 qp->sq.wrid[(qp->sq.head + nreq) & (qp->sq.wqe_cnt - 1)] = wr->wr_id;
2688
2689 ctrl->srcrb_flags =
2690 (wr->send_flags & IB_SEND_SIGNALED ?
2691 cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) |
2692 (wr->send_flags & IB_SEND_SOLICITED ?
2693 cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) |
2694 ((wr->send_flags & IB_SEND_IP_CSUM) ?
2695 cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
2696 MLX4_WQE_CTRL_TCP_UDP_CSUM) : 0) |
2697 qp->sq_signal_bits;
2698
2699 ctrl->imm = send_ieth(wr);
2700
2701 wqe += sizeof *ctrl;
2702 size = sizeof *ctrl / 16;
2703
2704 switch (qp->mlx4_ib_qp_type) {
2705 case MLX4_IB_QPT_RC:
2706 case MLX4_IB_QPT_UC:
2707 switch (wr->opcode) {
2708 case IB_WR_ATOMIC_CMP_AND_SWP:
2709 case IB_WR_ATOMIC_FETCH_AND_ADD:
2710 case IB_WR_MASKED_ATOMIC_FETCH_AND_ADD:
2711 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2712 wr->wr.atomic.rkey);
2713 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2714
2715 set_atomic_seg(wqe, wr);
2716 wqe += sizeof (struct mlx4_wqe_atomic_seg);
2717
2718 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2719 sizeof (struct mlx4_wqe_atomic_seg)) / 16;
2720
2721 break;
2722
2723 case IB_WR_MASKED_ATOMIC_CMP_AND_SWP:
2724 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2725 wr->wr.atomic.rkey);
2726 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2727
2728 set_masked_atomic_seg(wqe, wr);
2729 wqe += sizeof (struct mlx4_wqe_masked_atomic_seg);
2730
2731 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2732 sizeof (struct mlx4_wqe_masked_atomic_seg)) / 16;
2733
2734 break;
2735
2736 case IB_WR_RDMA_READ:
2737 case IB_WR_RDMA_WRITE:
2738 case IB_WR_RDMA_WRITE_WITH_IMM:
2739 set_raddr_seg(wqe, wr->wr.rdma.remote_addr,
2740 wr->wr.rdma.rkey);
2741 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2742 size += sizeof (struct mlx4_wqe_raddr_seg) / 16;
2743 break;
2744
2745 case IB_WR_LOCAL_INV:
2746 ctrl->srcrb_flags |=
2747 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2748 set_local_inv_seg(wqe, wr->ex.invalidate_rkey);
2749 wqe += sizeof (struct mlx4_wqe_local_inval_seg);
2750 size += sizeof (struct mlx4_wqe_local_inval_seg) / 16;
2751 break;
2752
2753 case IB_WR_FAST_REG_MR:
2754 ctrl->srcrb_flags |=
2755 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2756 set_fmr_seg(wqe, wr);
2757 wqe += sizeof (struct mlx4_wqe_fmr_seg);
2758 size += sizeof (struct mlx4_wqe_fmr_seg) / 16;
2759 break;
2760
2761 case IB_WR_BIND_MW:
2762 ctrl->srcrb_flags |=
2763 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2764 set_bind_seg(wqe, wr);
2765 wqe += sizeof(struct mlx4_wqe_bind_seg);
2766 size += sizeof(struct mlx4_wqe_bind_seg) / 16;
2767 break;
2768 default:
2769 /* No extra segments required for sends */
2770 break;
2771 }
2772 break;
2773
2774 case MLX4_IB_QPT_TUN_SMI_OWNER:
2775 err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2776 if (unlikely(err)) {
2777 *bad_wr = wr;
2778 goto out;
2779 }
2780 wqe += seglen;
2781 size += seglen / 16;
2782 break;
2783 case MLX4_IB_QPT_TUN_SMI:
2784 case MLX4_IB_QPT_TUN_GSI:
2785 /* this is a UD qp used in MAD responses to slaves. */
2786 set_datagram_seg(wqe, wr);
2787 /* set the forced-loopback bit in the data seg av */
2788 *(__be32 *) wqe |= cpu_to_be32(0x80000000);
2789 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2790 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2791 break;
2792 case MLX4_IB_QPT_UD:
2793 set_datagram_seg(wqe, wr);
2794 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2795 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2796
2797 if (wr->opcode == IB_WR_LSO) {
2798 err = build_lso_seg(wqe, wr, qp, &seglen, &lso_hdr_sz, &blh);
2799 if (unlikely(err)) {
2800 *bad_wr = wr;
2801 goto out;
2802 }
2803 lso_wqe = (__be32 *) wqe;
2804 wqe += seglen;
2805 size += seglen / 16;
2806 }
2807 break;
2808
2809 case MLX4_IB_QPT_PROXY_SMI_OWNER:
2810 err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2811 if (unlikely(err)) {
2812 *bad_wr = wr;
2813 goto out;
2814 }
2815 wqe += seglen;
2816 size += seglen / 16;
2817 /* to start tunnel header on a cache-line boundary */
2818 add_zero_len_inline(wqe);
2819 wqe += 16;
2820 size++;
2821 build_tunnel_header(wr, wqe, &seglen);
2822 wqe += seglen;
2823 size += seglen / 16;
2824 break;
2825 case MLX4_IB_QPT_PROXY_SMI:
2826 case MLX4_IB_QPT_PROXY_GSI:
2827 /* If we are tunneling special qps, this is a UD qp.
2828 * In this case we first add a UD segment targeting
2829 * the tunnel qp, and then add a header with address
2830 * information */
2831 set_tunnel_datagram_seg(to_mdev(ibqp->device), wqe, wr,
2832 qp->mlx4_ib_qp_type);
2833 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2834 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2835 build_tunnel_header(wr, wqe, &seglen);
2836 wqe += seglen;
2837 size += seglen / 16;
2838 break;
2839
2840 case MLX4_IB_QPT_SMI:
2841 case MLX4_IB_QPT_GSI:
2842 err = build_mlx_header(to_msqp(qp), wr, ctrl, &seglen);
2843 if (unlikely(err)) {
2844 *bad_wr = wr;
2845 goto out;
2846 }
2847 wqe += seglen;
2848 size += seglen / 16;
2849 break;
2850
2851 default:
2852 break;
2853 }
2854
2855 /*
2856 * Write data segments in reverse order, so as to
2857 * overwrite cacheline stamp last within each
2858 * cacheline. This avoids issues with WQE
2859 * prefetching.
2860 */
2861
2862 dseg = wqe;
2863 dseg += wr->num_sge - 1;
2864 size += wr->num_sge * (sizeof (struct mlx4_wqe_data_seg) / 16);
2865
2866 /* Add one more inline data segment for ICRC for MLX sends */
2867 if (unlikely(qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
2868 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI ||
2869 qp->mlx4_ib_qp_type &
2870 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))) {
2871 set_mlx_icrc_seg(dseg + 1);
2872 size += sizeof (struct mlx4_wqe_data_seg) / 16;
2873 }
2874
2875 for (i = wr->num_sge - 1; i >= 0; --i, --dseg)
2876 set_data_seg(dseg, wr->sg_list + i);
2877
2878 /*
2879 * Possibly overwrite stamping in cacheline with LSO
2880 * segment only after making sure all data segments
2881 * are written.
2882 */
2883 wmb();
2884 *lso_wqe = lso_hdr_sz;
2885
2886 ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ?
2887 MLX4_WQE_CTRL_FENCE : 0) | size;
2888
2889 /*
2890 * Make sure descriptor is fully written before
2891 * setting ownership bit (because HW can start
2892 * executing as soon as we do).
2893 */
2894 wmb();
2895
2896 if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) {
2897 *bad_wr = wr;
2898 err = -EINVAL;
2899 goto out;
2900 }
2901
2902 ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] |
2903 (ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0) | blh;
2904
2905 stamp = ind + qp->sq_spare_wqes;
2906 ind += DIV_ROUND_UP(size * 16, 1U << qp->sq.wqe_shift);
2907
2908 /*
2909 * We can improve latency by not stamping the last
2910 * send queue WQE until after ringing the doorbell, so
2911 * only stamp here if there are still more WQEs to post.
2912 *
2913 * Same optimization applies to padding with NOP wqe
2914 * in case of WQE shrinking (used to prevent wrap-around
2915 * in the middle of WR).
2916 */
2917 if (wr->next) {
2918 stamp_send_wqe(qp, stamp, size * 16);
2919 ind = pad_wraparound(qp, ind);
2920 }
2921 }
2922
2923 out:
2924 if (likely(nreq)) {
2925 qp->sq.head += nreq;
2926
2927 /*
2928 * Make sure that descriptors are written before
2929 * doorbell record.
2930 */
2931 wmb();
2932
2933 writel(qp->doorbell_qpn,
2934 to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL);
2935
2936 /*
2937 * Make sure doorbells don't leak out of SQ spinlock
2938 * and reach the HCA out of order.
2939 */
2940 mmiowb();
2941
2942 stamp_send_wqe(qp, stamp, size * 16);
2943
2944 ind = pad_wraparound(qp, ind);
2945 qp->sq_next_wqe = ind;
2946 }
2947
2948 spin_unlock_irqrestore(&qp->sq.lock, flags);
2949
2950 return err;
2951 }
2952
2953 int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
2954 struct ib_recv_wr **bad_wr)
2955 {
2956 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2957 struct mlx4_wqe_data_seg *scat;
2958 unsigned long flags;
2959 int err = 0;
2960 int nreq;
2961 int ind;
2962 int max_gs;
2963 int i;
2964 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
2965
2966 max_gs = qp->rq.max_gs;
2967 spin_lock_irqsave(&qp->rq.lock, flags);
2968
2969 if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) {
2970 err = -EIO;
2971 *bad_wr = wr;
2972 nreq = 0;
2973 goto out;
2974 }
2975
2976 ind = qp->rq.head & (qp->rq.wqe_cnt - 1);
2977
2978 for (nreq = 0; wr; ++nreq, wr = wr->next) {
2979 if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
2980 err = -ENOMEM;
2981 *bad_wr = wr;
2982 goto out;
2983 }
2984
2985 if (unlikely(wr->num_sge > qp->rq.max_gs)) {
2986 err = -EINVAL;
2987 *bad_wr = wr;
2988 goto out;
2989 }
2990
2991 scat = get_recv_wqe(qp, ind);
2992
2993 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
2994 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
2995 ib_dma_sync_single_for_device(ibqp->device,
2996 qp->sqp_proxy_rcv[ind].map,
2997 sizeof (struct mlx4_ib_proxy_sqp_hdr),
2998 DMA_FROM_DEVICE);
2999 scat->byte_count =
3000 cpu_to_be32(sizeof (struct mlx4_ib_proxy_sqp_hdr));
3001 /* use dma lkey from upper layer entry */
3002 scat->lkey = cpu_to_be32(wr->sg_list->lkey);
3003 scat->addr = cpu_to_be64(qp->sqp_proxy_rcv[ind].map);
3004 scat++;
3005 max_gs--;
3006 }
3007
3008 for (i = 0; i < wr->num_sge; ++i)
3009 __set_data_seg(scat + i, wr->sg_list + i);
3010
3011 if (i < max_gs) {
3012 scat[i].byte_count = 0;
3013 scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY);
3014 scat[i].addr = 0;
3015 }
3016
3017 qp->rq.wrid[ind] = wr->wr_id;
3018
3019 ind = (ind + 1) & (qp->rq.wqe_cnt - 1);
3020 }
3021
3022 out:
3023 if (likely(nreq)) {
3024 qp->rq.head += nreq;
3025
3026 /*
3027 * Make sure that descriptors are written before
3028 * doorbell record.
3029 */
3030 wmb();
3031
3032 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
3033 }
3034
3035 spin_unlock_irqrestore(&qp->rq.lock, flags);
3036
3037 return err;
3038 }
3039
3040 static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state)
3041 {
3042 switch (mlx4_state) {
3043 case MLX4_QP_STATE_RST: return IB_QPS_RESET;
3044 case MLX4_QP_STATE_INIT: return IB_QPS_INIT;
3045 case MLX4_QP_STATE_RTR: return IB_QPS_RTR;
3046 case MLX4_QP_STATE_RTS: return IB_QPS_RTS;
3047 case MLX4_QP_STATE_SQ_DRAINING:
3048 case MLX4_QP_STATE_SQD: return IB_QPS_SQD;
3049 case MLX4_QP_STATE_SQER: return IB_QPS_SQE;
3050 case MLX4_QP_STATE_ERR: return IB_QPS_ERR;
3051 default: return -1;
3052 }
3053 }
3054
3055 static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state)
3056 {
3057 switch (mlx4_mig_state) {
3058 case MLX4_QP_PM_ARMED: return IB_MIG_ARMED;
3059 case MLX4_QP_PM_REARM: return IB_MIG_REARM;
3060 case MLX4_QP_PM_MIGRATED: return IB_MIG_MIGRATED;
3061 default: return -1;
3062 }
3063 }
3064
3065 static int to_ib_qp_access_flags(int mlx4_flags)
3066 {
3067 int ib_flags = 0;
3068
3069 if (mlx4_flags & MLX4_QP_BIT_RRE)
3070 ib_flags |= IB_ACCESS_REMOTE_READ;
3071 if (mlx4_flags & MLX4_QP_BIT_RWE)
3072 ib_flags |= IB_ACCESS_REMOTE_WRITE;
3073 if (mlx4_flags & MLX4_QP_BIT_RAE)
3074 ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
3075
3076 return ib_flags;
3077 }
3078
3079 static void to_ib_ah_attr(struct mlx4_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr,
3080 struct mlx4_qp_path *path)
3081 {
3082 struct mlx4_dev *dev = ibdev->dev;
3083 int is_eth;
3084
3085 memset(ib_ah_attr, 0, sizeof *ib_ah_attr);
3086 ib_ah_attr->port_num = path->sched_queue & 0x40 ? 2 : 1;
3087
3088 if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports)
3089 return;
3090
3091 is_eth = rdma_port_get_link_layer(&ibdev->ib_dev, ib_ah_attr->port_num) ==
3092 IB_LINK_LAYER_ETHERNET;
3093 if (is_eth)
3094 ib_ah_attr->sl = ((path->sched_queue >> 3) & 0x7) |
3095 ((path->sched_queue & 4) << 1);
3096 else
3097 ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf;
3098
3099 ib_ah_attr->dlid = be16_to_cpu(path->rlid);
3100 ib_ah_attr->src_path_bits = path->grh_mylmc & 0x7f;
3101 ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0;
3102 ib_ah_attr->ah_flags = (path->grh_mylmc & (1 << 7)) ? IB_AH_GRH : 0;
3103 if (ib_ah_attr->ah_flags) {
3104 ib_ah_attr->grh.sgid_index = path->mgid_index;
3105 ib_ah_attr->grh.hop_limit = path->hop_limit;
3106 ib_ah_attr->grh.traffic_class =
3107 (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff;
3108 ib_ah_attr->grh.flow_label =
3109 be32_to_cpu(path->tclass_flowlabel) & 0xfffff;
3110 memcpy(ib_ah_attr->grh.dgid.raw,
3111 path->rgid, sizeof ib_ah_attr->grh.dgid.raw);
3112 }
3113 }
3114
3115 int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
3116 struct ib_qp_init_attr *qp_init_attr)
3117 {
3118 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
3119 struct mlx4_ib_qp *qp = to_mqp(ibqp);
3120 struct mlx4_qp_context context;
3121 int mlx4_state;
3122 int err = 0;
3123
3124 mutex_lock(&qp->mutex);
3125
3126 if (qp->state == IB_QPS_RESET) {
3127 qp_attr->qp_state = IB_QPS_RESET;
3128 goto done;
3129 }
3130
3131 err = mlx4_qp_query(dev->dev, &qp->mqp, &context);
3132 if (err) {
3133 err = -EINVAL;
3134 goto out;
3135 }
3136
3137 mlx4_state = be32_to_cpu(context.flags) >> 28;
3138
3139 qp->state = to_ib_qp_state(mlx4_state);
3140 qp_attr->qp_state = qp->state;
3141 qp_attr->path_mtu = context.mtu_msgmax >> 5;
3142 qp_attr->path_mig_state =
3143 to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3);
3144 qp_attr->qkey = be32_to_cpu(context.qkey);
3145 qp_attr->rq_psn = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff;
3146 qp_attr->sq_psn = be32_to_cpu(context.next_send_psn) & 0xffffff;
3147 qp_attr->dest_qp_num = be32_to_cpu(context.remote_qpn) & 0xffffff;
3148 qp_attr->qp_access_flags =
3149 to_ib_qp_access_flags(be32_to_cpu(context.params2));
3150
3151 if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) {
3152 to_ib_ah_attr(dev, &qp_attr->ah_attr, &context.pri_path);
3153 to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context.alt_path);
3154 qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f;
3155 qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num;
3156 }
3157
3158 qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f;
3159 if (qp_attr->qp_state == IB_QPS_INIT)
3160 qp_attr->port_num = qp->port;
3161 else
3162 qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1;
3163
3164 /* qp_attr->en_sqd_async_notify is only applicable in modify qp */
3165 qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING;
3166
3167 qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7);
3168
3169 qp_attr->max_dest_rd_atomic =
3170 1 << ((be32_to_cpu(context.params2) >> 21) & 0x7);
3171 qp_attr->min_rnr_timer =
3172 (be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f;
3173 qp_attr->timeout = context.pri_path.ackto >> 3;
3174 qp_attr->retry_cnt = (be32_to_cpu(context.params1) >> 16) & 0x7;
3175 qp_attr->rnr_retry = (be32_to_cpu(context.params1) >> 13) & 0x7;
3176 qp_attr->alt_timeout = context.alt_path.ackto >> 3;
3177
3178 done:
3179 qp_attr->cur_qp_state = qp_attr->qp_state;
3180 qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt;
3181 qp_attr->cap.max_recv_sge = qp->rq.max_gs;
3182
3183 if (!ibqp->uobject) {
3184 qp_attr->cap.max_send_wr = qp->sq.wqe_cnt;
3185 qp_attr->cap.max_send_sge = qp->sq.max_gs;
3186 } else {
3187 qp_attr->cap.max_send_wr = 0;
3188 qp_attr->cap.max_send_sge = 0;
3189 }
3190
3191 /*
3192 * We don't support inline sends for kernel QPs (yet), and we
3193 * don't know what userspace's value should be.
3194 */
3195 qp_attr->cap.max_inline_data = 0;
3196
3197 qp_init_attr->cap = qp_attr->cap;
3198
3199 qp_init_attr->create_flags = 0;
3200 if (qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK)
3201 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
3202
3203 if (qp->flags & MLX4_IB_QP_LSO)
3204 qp_init_attr->create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
3205
3206 if (qp->flags & MLX4_IB_QP_NETIF)
3207 qp_init_attr->create_flags |= IB_QP_CREATE_NETIF_QP;
3208
3209 qp_init_attr->sq_sig_type =
3210 qp->sq_signal_bits == cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) ?
3211 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
3212
3213 out:
3214 mutex_unlock(&qp->mutex);
3215 return err;
3216 }
3217
Linux kernel - Deliverables
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