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