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m68k/defconfig: Enable automounting of devtmpfs at /dev
[linux/fpc-iii.git] / drivers / infiniband / hw / mlx4 / qp.c
blobcf000b7ad64f9b11698ee8dbfa2aec9883e886db
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/qp.h>
44
45 #include "mlx4_ib.h"
46 #include "user.h"
47
48 enum {
49 MLX4_IB_ACK_REQ_FREQ = 8,
50 };
51
52 enum {
53 MLX4_IB_DEFAULT_SCHED_QUEUE = 0x83,
54 MLX4_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f,
55 MLX4_IB_LINK_TYPE_IB = 0,
56 MLX4_IB_LINK_TYPE_ETH = 1
57 };
58
59 enum {
60 /*
61 * Largest possible UD header: send with GRH and immediate
62 * data plus 18 bytes for an Ethernet header with VLAN/802.1Q
63 * tag. (LRH would only use 8 bytes, so Ethernet is the
64 * biggest case)
65 */
66 MLX4_IB_UD_HEADER_SIZE = 82,
67 MLX4_IB_LSO_HEADER_SPARE = 128,
68 };
69
70 enum {
71 MLX4_IB_IBOE_ETHERTYPE = 0x8915
72 };
73
74 struct mlx4_ib_sqp {
75 struct mlx4_ib_qp qp;
76 int pkey_index;
77 u32 qkey;
78 u32 send_psn;
79 struct ib_ud_header ud_header;
80 u8 header_buf[MLX4_IB_UD_HEADER_SIZE];
81 };
82
83 enum {
84 MLX4_IB_MIN_SQ_STRIDE = 6,
85 MLX4_IB_CACHE_LINE_SIZE = 64,
86 };
87
88 enum {
89 MLX4_RAW_QP_MTU = 7,
90 MLX4_RAW_QP_MSGMAX = 31,
91 };
92
93 #ifndef ETH_ALEN
94 #define ETH_ALEN 6
95 #endif
96 static inline u64 mlx4_mac_to_u64(u8 *addr)
97 {
98 u64 mac = 0;
99 int i;
100
101 for (i = 0; i < ETH_ALEN; i++) {
102 mac <<= 8;
103 mac |= addr[i];
104 }
105 return mac;
106 }
107
108 static const __be32 mlx4_ib_opcode[] = {
109 [IB_WR_SEND] = cpu_to_be32(MLX4_OPCODE_SEND),
110 [IB_WR_LSO] = cpu_to_be32(MLX4_OPCODE_LSO),
111 [IB_WR_SEND_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_SEND_IMM),
112 [IB_WR_RDMA_WRITE] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE),
113 [IB_WR_RDMA_WRITE_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE_IMM),
114 [IB_WR_RDMA_READ] = cpu_to_be32(MLX4_OPCODE_RDMA_READ),
115 [IB_WR_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_ATOMIC_CS),
116 [IB_WR_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_ATOMIC_FA),
117 [IB_WR_SEND_WITH_INV] = cpu_to_be32(MLX4_OPCODE_SEND_INVAL),
118 [IB_WR_LOCAL_INV] = cpu_to_be32(MLX4_OPCODE_LOCAL_INVAL),
119 [IB_WR_FAST_REG_MR] = cpu_to_be32(MLX4_OPCODE_FMR),
120 [IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_CS),
121 [IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_FA),
122 [IB_WR_BIND_MW] = cpu_to_be32(MLX4_OPCODE_BIND_MW),
123 };
124
125 static struct mlx4_ib_sqp *to_msqp(struct mlx4_ib_qp *mqp)
126 {
127 return container_of(mqp, struct mlx4_ib_sqp, qp);
128 }
129
130 static int is_tunnel_qp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
131 {
132 if (!mlx4_is_master(dev->dev))
133 return 0;
134
135 return qp->mqp.qpn >= dev->dev->phys_caps.base_tunnel_sqpn &&
136 qp->mqp.qpn < dev->dev->phys_caps.base_tunnel_sqpn +
137 8 * MLX4_MFUNC_MAX;
138 }
139
140 static int is_sqp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
141 {
142 int proxy_sqp = 0;
143 int real_sqp = 0;
144 int i;
145 /* PPF or Native -- real SQP */
146 real_sqp = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) &&
147 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn &&
148 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 3);
149 if (real_sqp)
150 return 1;
151 /* VF or PF -- proxy SQP */
152 if (mlx4_is_mfunc(dev->dev)) {
153 for (i = 0; i < dev->dev->caps.num_ports; i++) {
154 if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i] ||
155 qp->mqp.qpn == dev->dev->caps.qp1_proxy[i]) {
156 proxy_sqp = 1;
157 break;
158 }
159 }
160 }
161 return proxy_sqp;
162 }
163
164 /* used for INIT/CLOSE port logic */
165 static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
166 {
167 int proxy_qp0 = 0;
168 int real_qp0 = 0;
169 int i;
170 /* PPF or Native -- real QP0 */
171 real_qp0 = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) &&
172 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn &&
173 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 1);
174 if (real_qp0)
175 return 1;
176 /* VF or PF -- proxy QP0 */
177 if (mlx4_is_mfunc(dev->dev)) {
178 for (i = 0; i < dev->dev->caps.num_ports; i++) {
179 if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i]) {
180 proxy_qp0 = 1;
181 break;
182 }
183 }
184 }
185 return proxy_qp0;
186 }
187
188 static void *get_wqe(struct mlx4_ib_qp *qp, int offset)
189 {
190 return mlx4_buf_offset(&qp->buf, offset);
191 }
192
193 static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n)
194 {
195 return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift));
196 }
197
198 static void *get_send_wqe(struct mlx4_ib_qp *qp, int n)
199 {
200 return get_wqe(qp, qp->sq.offset + (n << qp->sq.wqe_shift));
201 }
202
203 /*
204 * Stamp a SQ WQE so that it is invalid if prefetched by marking the
205 * first four bytes of every 64 byte chunk with
206 * 0x7FFFFFF | (invalid_ownership_value << 31).
207 *
208 * When the max work request size is less than or equal to the WQE
209 * basic block size, as an optimization, we can stamp all WQEs with
210 * 0xffffffff, and skip the very first chunk of each WQE.
211 */
212 static void stamp_send_wqe(struct mlx4_ib_qp *qp, int n, int size)
213 {
214 __be32 *wqe;
215 int i;
216 int s;
217 int ind;
218 void *buf;
219 __be32 stamp;
220 struct mlx4_wqe_ctrl_seg *ctrl;
221
222 if (qp->sq_max_wqes_per_wr > 1) {
223 s = roundup(size, 1U << qp->sq.wqe_shift);
224 for (i = 0; i < s; i += 64) {
225 ind = (i >> qp->sq.wqe_shift) + n;
226 stamp = ind & qp->sq.wqe_cnt ? cpu_to_be32(0x7fffffff) :
227 cpu_to_be32(0xffffffff);
228 buf = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
229 wqe = buf + (i & ((1 << qp->sq.wqe_shift) - 1));
230 *wqe = stamp;
231 }
232 } else {
233 ctrl = buf = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
234 s = (ctrl->fence_size & 0x3f) << 4;
235 for (i = 64; i < s; i += 64) {
236 wqe = buf + i;
237 *wqe = cpu_to_be32(0xffffffff);
238 }
239 }
240 }
241
242 static void post_nop_wqe(struct mlx4_ib_qp *qp, int n, int size)
243 {
244 struct mlx4_wqe_ctrl_seg *ctrl;
245 struct mlx4_wqe_inline_seg *inl;
246 void *wqe;
247 int s;
248
249 ctrl = wqe = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
250 s = sizeof(struct mlx4_wqe_ctrl_seg);
251
252 if (qp->ibqp.qp_type == IB_QPT_UD) {
253 struct mlx4_wqe_datagram_seg *dgram = wqe + sizeof *ctrl;
254 struct mlx4_av *av = (struct mlx4_av *)dgram->av;
255 memset(dgram, 0, sizeof *dgram);
256 av->port_pd = cpu_to_be32((qp->port << 24) | to_mpd(qp->ibqp.pd)->pdn);
257 s += sizeof(struct mlx4_wqe_datagram_seg);
258 }
259
260 /* Pad the remainder of the WQE with an inline data segment. */
261 if (size > s) {
262 inl = wqe + s;
263 inl->byte_count = cpu_to_be32(1 << 31 | (size - s - sizeof *inl));
264 }
265 ctrl->srcrb_flags = 0;
266 ctrl->fence_size = size / 16;
267 /*
268 * Make sure descriptor is fully written before setting ownership bit
269 * (because HW can start executing as soon as we do).
270 */
271 wmb();
272
273 ctrl->owner_opcode = cpu_to_be32(MLX4_OPCODE_NOP | MLX4_WQE_CTRL_NEC) |
274 (n & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0);
275
276 stamp_send_wqe(qp, n + qp->sq_spare_wqes, size);
277 }
278
279 /* Post NOP WQE to prevent wrap-around in the middle of WR */
280 static inline unsigned pad_wraparound(struct mlx4_ib_qp *qp, int ind)
281 {
282 unsigned s = qp->sq.wqe_cnt - (ind & (qp->sq.wqe_cnt - 1));
283 if (unlikely(s < qp->sq_max_wqes_per_wr)) {
284 post_nop_wqe(qp, ind, s << qp->sq.wqe_shift);
285 ind += s;
286 }
287 return ind;
288 }
289
290 static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type)
291 {
292 struct ib_event event;
293 struct ib_qp *ibqp = &to_mibqp(qp)->ibqp;
294
295 if (type == MLX4_EVENT_TYPE_PATH_MIG)
296 to_mibqp(qp)->port = to_mibqp(qp)->alt_port;
297
298 if (ibqp->event_handler) {
299 event.device = ibqp->device;
300 event.element.qp = ibqp;
301 switch (type) {
302 case MLX4_EVENT_TYPE_PATH_MIG:
303 event.event = IB_EVENT_PATH_MIG;
304 break;
305 case MLX4_EVENT_TYPE_COMM_EST:
306 event.event = IB_EVENT_COMM_EST;
307 break;
308 case MLX4_EVENT_TYPE_SQ_DRAINED:
309 event.event = IB_EVENT_SQ_DRAINED;
310 break;
311 case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
312 event.event = IB_EVENT_QP_LAST_WQE_REACHED;
313 break;
314 case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
315 event.event = IB_EVENT_QP_FATAL;
316 break;
317 case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
318 event.event = IB_EVENT_PATH_MIG_ERR;
319 break;
320 case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
321 event.event = IB_EVENT_QP_REQ_ERR;
322 break;
323 case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
324 event.event = IB_EVENT_QP_ACCESS_ERR;
325 break;
326 default:
327 pr_warn("Unexpected event type %d "
328 "on QP %06x\n", type, qp->qpn);
329 return;
330 }
331
332 ibqp->event_handler(&event, ibqp->qp_context);
333 }
334 }
335
336 static int send_wqe_overhead(enum mlx4_ib_qp_type type, u32 flags)
337 {
338 /*
339 * UD WQEs must have a datagram segment.
340 * RC and UC WQEs might have a remote address segment.
341 * MLX WQEs need two extra inline data segments (for the UD
342 * header and space for the ICRC).
343 */
344 switch (type) {
345 case MLX4_IB_QPT_UD:
346 return sizeof (struct mlx4_wqe_ctrl_seg) +
347 sizeof (struct mlx4_wqe_datagram_seg) +
348 ((flags & MLX4_IB_QP_LSO) ? MLX4_IB_LSO_HEADER_SPARE : 0);
349 case MLX4_IB_QPT_PROXY_SMI_OWNER:
350 case MLX4_IB_QPT_PROXY_SMI:
351 case MLX4_IB_QPT_PROXY_GSI:
352 return sizeof (struct mlx4_wqe_ctrl_seg) +
353 sizeof (struct mlx4_wqe_datagram_seg) + 64;
354 case MLX4_IB_QPT_TUN_SMI_OWNER:
355 case MLX4_IB_QPT_TUN_GSI:
356 return sizeof (struct mlx4_wqe_ctrl_seg) +
357 sizeof (struct mlx4_wqe_datagram_seg);
358
359 case MLX4_IB_QPT_UC:
360 return sizeof (struct mlx4_wqe_ctrl_seg) +
361 sizeof (struct mlx4_wqe_raddr_seg);
362 case MLX4_IB_QPT_RC:
363 return sizeof (struct mlx4_wqe_ctrl_seg) +
364 sizeof (struct mlx4_wqe_atomic_seg) +
365 sizeof (struct mlx4_wqe_raddr_seg);
366 case MLX4_IB_QPT_SMI:
367 case MLX4_IB_QPT_GSI:
368 return sizeof (struct mlx4_wqe_ctrl_seg) +
369 ALIGN(MLX4_IB_UD_HEADER_SIZE +
370 DIV_ROUND_UP(MLX4_IB_UD_HEADER_SIZE,
371 MLX4_INLINE_ALIGN) *
372 sizeof (struct mlx4_wqe_inline_seg),
373 sizeof (struct mlx4_wqe_data_seg)) +
374 ALIGN(4 +
375 sizeof (struct mlx4_wqe_inline_seg),
376 sizeof (struct mlx4_wqe_data_seg));
377 default:
378 return sizeof (struct mlx4_wqe_ctrl_seg);
379 }
380 }
381
382 static int set_rq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
383 int is_user, int has_rq, struct mlx4_ib_qp *qp)
384 {
385 /* Sanity check RQ size before proceeding */
386 if (cap->max_recv_wr > dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE ||
387 cap->max_recv_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg))
388 return -EINVAL;
389
390 if (!has_rq) {
391 if (cap->max_recv_wr)
392 return -EINVAL;
393
394 qp->rq.wqe_cnt = qp->rq.max_gs = 0;
395 } else {
396 /* HW requires >= 1 RQ entry with >= 1 gather entry */
397 if (is_user && (!cap->max_recv_wr || !cap->max_recv_sge))
398 return -EINVAL;
399
400 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, cap->max_recv_wr));
401 qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge));
402 qp->rq.wqe_shift = ilog2(qp->rq.max_gs * sizeof (struct mlx4_wqe_data_seg));
403 }
404
405 /* leave userspace return values as they were, so as not to break ABI */
406 if (is_user) {
407 cap->max_recv_wr = qp->rq.max_post = qp->rq.wqe_cnt;
408 cap->max_recv_sge = qp->rq.max_gs;
409 } else {
410 cap->max_recv_wr = qp->rq.max_post =
411 min(dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE, qp->rq.wqe_cnt);
412 cap->max_recv_sge = min(qp->rq.max_gs,
413 min(dev->dev->caps.max_sq_sg,
414 dev->dev->caps.max_rq_sg));
415 }
416
417 return 0;
418 }
419
420 static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
421 enum mlx4_ib_qp_type type, struct mlx4_ib_qp *qp)
422 {
423 int s;
424
425 /* Sanity check SQ size before proceeding */
426 if (cap->max_send_wr > (dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE) ||
427 cap->max_send_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg) ||
428 cap->max_inline_data + send_wqe_overhead(type, qp->flags) +
429 sizeof (struct mlx4_wqe_inline_seg) > dev->dev->caps.max_sq_desc_sz)
430 return -EINVAL;
431
432 /*
433 * For MLX transport we need 2 extra S/G entries:
434 * one for the header and one for the checksum at the end
435 */
436 if ((type == MLX4_IB_QPT_SMI || type == MLX4_IB_QPT_GSI ||
437 type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) &&
438 cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg)
439 return -EINVAL;
440
441 s = max(cap->max_send_sge * sizeof (struct mlx4_wqe_data_seg),
442 cap->max_inline_data + sizeof (struct mlx4_wqe_inline_seg)) +
443 send_wqe_overhead(type, qp->flags);
444
445 if (s > dev->dev->caps.max_sq_desc_sz)
446 return -EINVAL;
447
448 /*
449 * Hermon supports shrinking WQEs, such that a single work
450 * request can include multiple units of 1 << wqe_shift. This
451 * way, work requests can differ in size, and do not have to
452 * be a power of 2 in size, saving memory and speeding up send
453 * WR posting. Unfortunately, if we do this then the
454 * wqe_index field in CQEs can't be used to look up the WR ID
455 * anymore, so we do this only if selective signaling is off.
456 *
457 * Further, on 32-bit platforms, we can't use vmap() to make
458 * the QP buffer virtually contiguous. Thus we have to use
459 * constant-sized WRs to make sure a WR is always fully within
460 * a single page-sized chunk.
461 *
462 * Finally, we use NOP work requests to pad the end of the
463 * work queue, to avoid wrap-around in the middle of WR. We
464 * set NEC bit to avoid getting completions with error for
465 * these NOP WRs, but since NEC is only supported starting
466 * with firmware 2.2.232, we use constant-sized WRs for older
467 * firmware.
468 *
469 * And, since MLX QPs only support SEND, we use constant-sized
470 * WRs in this case.
471 *
472 * We look for the smallest value of wqe_shift such that the
473 * resulting number of wqes does not exceed device
474 * capabilities.
475 *
476 * We set WQE size to at least 64 bytes, this way stamping
477 * invalidates each WQE.
478 */
479 if (dev->dev->caps.fw_ver >= MLX4_FW_VER_WQE_CTRL_NEC &&
480 qp->sq_signal_bits && BITS_PER_LONG == 64 &&
481 type != MLX4_IB_QPT_SMI && type != MLX4_IB_QPT_GSI &&
482 !(type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_PROXY_SMI |
483 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER)))
484 qp->sq.wqe_shift = ilog2(64);
485 else
486 qp->sq.wqe_shift = ilog2(roundup_pow_of_two(s));
487
488 for (;;) {
489 qp->sq_max_wqes_per_wr = DIV_ROUND_UP(s, 1U << qp->sq.wqe_shift);
490
491 /*
492 * We need to leave 2 KB + 1 WR of headroom in the SQ to
493 * allow HW to prefetch.
494 */
495 qp->sq_spare_wqes = (2048 >> qp->sq.wqe_shift) + qp->sq_max_wqes_per_wr;
496 qp->sq.wqe_cnt = roundup_pow_of_two(cap->max_send_wr *
497 qp->sq_max_wqes_per_wr +
498 qp->sq_spare_wqes);
499
500 if (qp->sq.wqe_cnt <= dev->dev->caps.max_wqes)
501 break;
502
503 if (qp->sq_max_wqes_per_wr <= 1)
504 return -EINVAL;
505
506 ++qp->sq.wqe_shift;
507 }
508
509 qp->sq.max_gs = (min(dev->dev->caps.max_sq_desc_sz,
510 (qp->sq_max_wqes_per_wr << qp->sq.wqe_shift)) -
511 send_wqe_overhead(type, qp->flags)) /
512 sizeof (struct mlx4_wqe_data_seg);
513
514 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
515 (qp->sq.wqe_cnt << qp->sq.wqe_shift);
516 if (qp->rq.wqe_shift > qp->sq.wqe_shift) {
517 qp->rq.offset = 0;
518 qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift;
519 } else {
520 qp->rq.offset = qp->sq.wqe_cnt << qp->sq.wqe_shift;
521 qp->sq.offset = 0;
522 }
523
524 cap->max_send_wr = qp->sq.max_post =
525 (qp->sq.wqe_cnt - qp->sq_spare_wqes) / qp->sq_max_wqes_per_wr;
526 cap->max_send_sge = min(qp->sq.max_gs,
527 min(dev->dev->caps.max_sq_sg,
528 dev->dev->caps.max_rq_sg));
529 /* We don't support inline sends for kernel QPs (yet) */
530 cap->max_inline_data = 0;
531
532 return 0;
533 }
534
535 static int set_user_sq_size(struct mlx4_ib_dev *dev,
536 struct mlx4_ib_qp *qp,
537 struct mlx4_ib_create_qp *ucmd)
538 {
539 /* Sanity check SQ size before proceeding */
540 if ((1 << ucmd->log_sq_bb_count) > dev->dev->caps.max_wqes ||
541 ucmd->log_sq_stride >
542 ilog2(roundup_pow_of_two(dev->dev->caps.max_sq_desc_sz)) ||
543 ucmd->log_sq_stride < MLX4_IB_MIN_SQ_STRIDE)
544 return -EINVAL;
545
546 qp->sq.wqe_cnt = 1 << ucmd->log_sq_bb_count;
547 qp->sq.wqe_shift = ucmd->log_sq_stride;
548
549 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
550 (qp->sq.wqe_cnt << qp->sq.wqe_shift);
551
552 return 0;
553 }
554
555 static int alloc_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp)
556 {
557 int i;
558
559 qp->sqp_proxy_rcv =
560 kmalloc(sizeof (struct mlx4_ib_buf) * qp->rq.wqe_cnt,
561 GFP_KERNEL);
562 if (!qp->sqp_proxy_rcv)
563 return -ENOMEM;
564 for (i = 0; i < qp->rq.wqe_cnt; i++) {
565 qp->sqp_proxy_rcv[i].addr =
566 kmalloc(sizeof (struct mlx4_ib_proxy_sqp_hdr),
567 GFP_KERNEL);
568 if (!qp->sqp_proxy_rcv[i].addr)
569 goto err;
570 qp->sqp_proxy_rcv[i].map =
571 ib_dma_map_single(dev, qp->sqp_proxy_rcv[i].addr,
572 sizeof (struct mlx4_ib_proxy_sqp_hdr),
573 DMA_FROM_DEVICE);
574 }
575 return 0;
576
577 err:
578 while (i > 0) {
579 --i;
580 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map,
581 sizeof (struct mlx4_ib_proxy_sqp_hdr),
582 DMA_FROM_DEVICE);
583 kfree(qp->sqp_proxy_rcv[i].addr);
584 }
585 kfree(qp->sqp_proxy_rcv);
586 qp->sqp_proxy_rcv = NULL;
587 return -ENOMEM;
588 }
589
590 static void free_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp)
591 {
592 int i;
593
594 for (i = 0; i < qp->rq.wqe_cnt; i++) {
595 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map,
596 sizeof (struct mlx4_ib_proxy_sqp_hdr),
597 DMA_FROM_DEVICE);
598 kfree(qp->sqp_proxy_rcv[i].addr);
599 }
600 kfree(qp->sqp_proxy_rcv);
601 }
602
603 static int qp_has_rq(struct ib_qp_init_attr *attr)
604 {
605 if (attr->qp_type == IB_QPT_XRC_INI || attr->qp_type == IB_QPT_XRC_TGT)
606 return 0;
607
608 return !attr->srq;
609 }
610
611 static int qp0_enabled_vf(struct mlx4_dev *dev, int qpn)
612 {
613 int i;
614 for (i = 0; i < dev->caps.num_ports; i++) {
615 if (qpn == dev->caps.qp0_proxy[i])
616 return !!dev->caps.qp0_qkey[i];
617 }
618 return 0;
619 }
620
621 static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
622 struct ib_qp_init_attr *init_attr,
623 struct ib_udata *udata, int sqpn, struct mlx4_ib_qp **caller_qp,
624 gfp_t gfp)
625 {
626 int qpn;
627 int err;
628 struct mlx4_ib_sqp *sqp;
629 struct mlx4_ib_qp *qp;
630 enum mlx4_ib_qp_type qp_type = (enum mlx4_ib_qp_type) init_attr->qp_type;
631
632 /* When tunneling special qps, we use a plain UD qp */
633 if (sqpn) {
634 if (mlx4_is_mfunc(dev->dev) &&
635 (!mlx4_is_master(dev->dev) ||
636 !(init_attr->create_flags & MLX4_IB_SRIOV_SQP))) {
637 if (init_attr->qp_type == IB_QPT_GSI)
638 qp_type = MLX4_IB_QPT_PROXY_GSI;
639 else {
640 if (mlx4_is_master(dev->dev) ||
641 qp0_enabled_vf(dev->dev, sqpn))
642 qp_type = MLX4_IB_QPT_PROXY_SMI_OWNER;
643 else
644 qp_type = MLX4_IB_QPT_PROXY_SMI;
645 }
646 }
647 qpn = sqpn;
648 /* add extra sg entry for tunneling */
649 init_attr->cap.max_recv_sge++;
650 } else if (init_attr->create_flags & MLX4_IB_SRIOV_TUNNEL_QP) {
651 struct mlx4_ib_qp_tunnel_init_attr *tnl_init =
652 container_of(init_attr,
653 struct mlx4_ib_qp_tunnel_init_attr, init_attr);
654 if ((tnl_init->proxy_qp_type != IB_QPT_SMI &&
655 tnl_init->proxy_qp_type != IB_QPT_GSI) ||
656 !mlx4_is_master(dev->dev))
657 return -EINVAL;
658 if (tnl_init->proxy_qp_type == IB_QPT_GSI)
659 qp_type = MLX4_IB_QPT_TUN_GSI;
660 else if (tnl_init->slave == mlx4_master_func_num(dev->dev) ||
661 mlx4_vf_smi_enabled(dev->dev, tnl_init->slave,
662 tnl_init->port))
663 qp_type = MLX4_IB_QPT_TUN_SMI_OWNER;
664 else
665 qp_type = MLX4_IB_QPT_TUN_SMI;
666 /* we are definitely in the PPF here, since we are creating
667 * tunnel QPs. base_tunnel_sqpn is therefore valid. */
668 qpn = dev->dev->phys_caps.base_tunnel_sqpn + 8 * tnl_init->slave
669 + tnl_init->proxy_qp_type * 2 + tnl_init->port - 1;
670 sqpn = qpn;
671 }
672
673 if (!*caller_qp) {
674 if (qp_type == MLX4_IB_QPT_SMI || qp_type == MLX4_IB_QPT_GSI ||
675 (qp_type & (MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_SMI_OWNER |
676 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER))) {
677 sqp = kzalloc(sizeof (struct mlx4_ib_sqp), gfp);
678 if (!sqp)
679 return -ENOMEM;
680 qp = &sqp->qp;
681 qp->pri.vid = 0xFFFF;
682 qp->alt.vid = 0xFFFF;
683 } else {
684 qp = kzalloc(sizeof (struct mlx4_ib_qp), gfp);
685 if (!qp)
686 return -ENOMEM;
687 qp->pri.vid = 0xFFFF;
688 qp->alt.vid = 0xFFFF;
689 }
690 } else
691 qp = *caller_qp;
692
693 qp->mlx4_ib_qp_type = qp_type;
694
695 mutex_init(&qp->mutex);
696 spin_lock_init(&qp->sq.lock);
697 spin_lock_init(&qp->rq.lock);
698 INIT_LIST_HEAD(&qp->gid_list);
699 INIT_LIST_HEAD(&qp->steering_rules);
700
701 qp->state = IB_QPS_RESET;
702 if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
703 qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
704
705 err = set_rq_size(dev, &init_attr->cap, !!pd->uobject, qp_has_rq(init_attr), qp);
706 if (err)
707 goto err;
708
709 if (pd->uobject) {
710 struct mlx4_ib_create_qp ucmd;
711
712 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
713 err = -EFAULT;
714 goto err;
715 }
716
717 qp->sq_no_prefetch = ucmd.sq_no_prefetch;
718
719 err = set_user_sq_size(dev, qp, &ucmd);
720 if (err)
721 goto err;
722
723 qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
724 qp->buf_size, 0, 0);
725 if (IS_ERR(qp->umem)) {
726 err = PTR_ERR(qp->umem);
727 goto err;
728 }
729
730 err = mlx4_mtt_init(dev->dev, ib_umem_page_count(qp->umem),
731 ilog2(qp->umem->page_size), &qp->mtt);
732 if (err)
733 goto err_buf;
734
735 err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem);
736 if (err)
737 goto err_mtt;
738
739 if (qp_has_rq(init_attr)) {
740 err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context),
741 ucmd.db_addr, &qp->db);
742 if (err)
743 goto err_mtt;
744 }
745 } else {
746 qp->sq_no_prefetch = 0;
747
748 if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK)
749 qp->flags |= MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK;
750
751 if (init_attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO)
752 qp->flags |= MLX4_IB_QP_LSO;
753
754 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) {
755 if (dev->steering_support ==
756 MLX4_STEERING_MODE_DEVICE_MANAGED)
757 qp->flags |= MLX4_IB_QP_NETIF;
758 else
759 goto err;
760 }
761
762 err = set_kernel_sq_size(dev, &init_attr->cap, qp_type, qp);
763 if (err)
764 goto err;
765
766 if (qp_has_rq(init_attr)) {
767 err = mlx4_db_alloc(dev->dev, &qp->db, 0, gfp);
768 if (err)
769 goto err;
770
771 *qp->db.db = 0;
772 }
773
774 if (mlx4_buf_alloc(dev->dev, qp->buf_size, PAGE_SIZE * 2, &qp->buf, gfp)) {
775 err = -ENOMEM;
776 goto err_db;
777 }
778
779 err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift,
780 &qp->mtt);
781 if (err)
782 goto err_buf;
783
784 err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf, gfp);
785 if (err)
786 goto err_mtt;
787
788 qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof (u64), gfp);
789 qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof (u64), gfp);
790 if (!qp->sq.wrid || !qp->rq.wrid) {
791 err = -ENOMEM;
792 goto err_wrid;
793 }
794 }
795
796 if (sqpn) {
797 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
798 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
799 if (alloc_proxy_bufs(pd->device, qp)) {
800 err = -ENOMEM;
801 goto err_wrid;
802 }
803 }
804 } else {
805 /* Raw packet QPNs may not have bits 6,7 set in their qp_num;
806 * otherwise, the WQE BlueFlame setup flow wrongly causes
807 * VLAN insertion. */
808 if (init_attr->qp_type == IB_QPT_RAW_PACKET)
809 err = mlx4_qp_reserve_range(dev->dev, 1, 1, &qpn,
810 (init_attr->cap.max_send_wr ?
811 MLX4_RESERVE_ETH_BF_QP : 0) |
812 (init_attr->cap.max_recv_wr ?
813 MLX4_RESERVE_A0_QP : 0));
814 else
815 if (qp->flags & MLX4_IB_QP_NETIF)
816 err = mlx4_ib_steer_qp_alloc(dev, 1, &qpn);
817 else
818 err = mlx4_qp_reserve_range(dev->dev, 1, 1,
819 &qpn, 0);
820 if (err)
821 goto err_proxy;
822 }
823
824 err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp, gfp);
825 if (err)
826 goto err_qpn;
827
828 if (init_attr->qp_type == IB_QPT_XRC_TGT)
829 qp->mqp.qpn |= (1 << 23);
830
831 /*
832 * Hardware wants QPN written in big-endian order (after
833 * shifting) for send doorbell. Precompute this value to save
834 * a little bit when posting sends.
835 */
836 qp->doorbell_qpn = swab32(qp->mqp.qpn << 8);
837
838 qp->mqp.event = mlx4_ib_qp_event;
839 if (!*caller_qp)
840 *caller_qp = qp;
841 return 0;
842
843 err_qpn:
844 if (!sqpn) {
845 if (qp->flags & MLX4_IB_QP_NETIF)
846 mlx4_ib_steer_qp_free(dev, qpn, 1);
847 else
848 mlx4_qp_release_range(dev->dev, qpn, 1);
849 }
850 err_proxy:
851 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI)
852 free_proxy_bufs(pd->device, qp);
853 err_wrid:
854 if (pd->uobject) {
855 if (qp_has_rq(init_attr))
856 mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db);
857 } else {
858 kfree(qp->sq.wrid);
859 kfree(qp->rq.wrid);
860 }
861
862 err_mtt:
863 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
864
865 err_buf:
866 if (pd->uobject)
867 ib_umem_release(qp->umem);
868 else
869 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
870
871 err_db:
872 if (!pd->uobject && qp_has_rq(init_attr))
873 mlx4_db_free(dev->dev, &qp->db);
874
875 err:
876 if (!*caller_qp)
877 kfree(qp);
878 return err;
879 }
880
881 static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state)
882 {
883 switch (state) {
884 case IB_QPS_RESET: return MLX4_QP_STATE_RST;
885 case IB_QPS_INIT: return MLX4_QP_STATE_INIT;
886 case IB_QPS_RTR: return MLX4_QP_STATE_RTR;
887 case IB_QPS_RTS: return MLX4_QP_STATE_RTS;
888 case IB_QPS_SQD: return MLX4_QP_STATE_SQD;
889 case IB_QPS_SQE: return MLX4_QP_STATE_SQER;
890 case IB_QPS_ERR: return MLX4_QP_STATE_ERR;
891 default: return -1;
892 }
893 }
894
895 static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
896 __acquires(&send_cq->lock) __acquires(&recv_cq->lock)
897 {
898 if (send_cq == recv_cq) {
899 spin_lock_irq(&send_cq->lock);
900 __acquire(&recv_cq->lock);
901 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
902 spin_lock_irq(&send_cq->lock);
903 spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING);
904 } else {
905 spin_lock_irq(&recv_cq->lock);
906 spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING);
907 }
908 }
909
910 static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
911 __releases(&send_cq->lock) __releases(&recv_cq->lock)
912 {
913 if (send_cq == recv_cq) {
914 __release(&recv_cq->lock);
915 spin_unlock_irq(&send_cq->lock);
916 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
917 spin_unlock(&recv_cq->lock);
918 spin_unlock_irq(&send_cq->lock);
919 } else {
920 spin_unlock(&send_cq->lock);
921 spin_unlock_irq(&recv_cq->lock);
922 }
923 }
924
925 static void del_gid_entries(struct mlx4_ib_qp *qp)
926 {
927 struct mlx4_ib_gid_entry *ge, *tmp;
928
929 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
930 list_del(&ge->list);
931 kfree(ge);
932 }
933 }
934
935 static struct mlx4_ib_pd *get_pd(struct mlx4_ib_qp *qp)
936 {
937 if (qp->ibqp.qp_type == IB_QPT_XRC_TGT)
938 return to_mpd(to_mxrcd(qp->ibqp.xrcd)->pd);
939 else
940 return to_mpd(qp->ibqp.pd);
941 }
942
943 static void get_cqs(struct mlx4_ib_qp *qp,
944 struct mlx4_ib_cq **send_cq, struct mlx4_ib_cq **recv_cq)
945 {
946 switch (qp->ibqp.qp_type) {
947 case IB_QPT_XRC_TGT:
948 *send_cq = to_mcq(to_mxrcd(qp->ibqp.xrcd)->cq);
949 *recv_cq = *send_cq;
950 break;
951 case IB_QPT_XRC_INI:
952 *send_cq = to_mcq(qp->ibqp.send_cq);
953 *recv_cq = *send_cq;
954 break;
955 default:
956 *send_cq = to_mcq(qp->ibqp.send_cq);
957 *recv_cq = to_mcq(qp->ibqp.recv_cq);
958 break;
959 }
960 }
961
962 static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
963 int is_user)
964 {
965 struct mlx4_ib_cq *send_cq, *recv_cq;
966
967 if (qp->state != IB_QPS_RESET) {
968 if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state),
969 MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp))
970 pr_warn("modify QP %06x to RESET failed.\n",
971 qp->mqp.qpn);
972 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) {
973 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
974 qp->pri.smac = 0;
975 qp->pri.smac_port = 0;
976 }
977 if (qp->alt.smac) {
978 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
979 qp->alt.smac = 0;
980 }
981 if (qp->pri.vid < 0x1000) {
982 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid);
983 qp->pri.vid = 0xFFFF;
984 qp->pri.candidate_vid = 0xFFFF;
985 qp->pri.update_vid = 0;
986 }
987 if (qp->alt.vid < 0x1000) {
988 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid);
989 qp->alt.vid = 0xFFFF;
990 qp->alt.candidate_vid = 0xFFFF;
991 qp->alt.update_vid = 0;
992 }
993 }
994
995 get_cqs(qp, &send_cq, &recv_cq);
996
997 mlx4_ib_lock_cqs(send_cq, recv_cq);
998
999 if (!is_user) {
1000 __mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
1001 qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL);
1002 if (send_cq != recv_cq)
1003 __mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1004 }
1005
1006 mlx4_qp_remove(dev->dev, &qp->mqp);
1007
1008 mlx4_ib_unlock_cqs(send_cq, recv_cq);
1009
1010 mlx4_qp_free(dev->dev, &qp->mqp);
1011
1012 if (!is_sqp(dev, qp) && !is_tunnel_qp(dev, qp)) {
1013 if (qp->flags & MLX4_IB_QP_NETIF)
1014 mlx4_ib_steer_qp_free(dev, qp->mqp.qpn, 1);
1015 else
1016 mlx4_qp_release_range(dev->dev, qp->mqp.qpn, 1);
1017 }
1018
1019 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
1020
1021 if (is_user) {
1022 if (qp->rq.wqe_cnt)
1023 mlx4_ib_db_unmap_user(to_mucontext(qp->ibqp.uobject->context),
1024 &qp->db);
1025 ib_umem_release(qp->umem);
1026 } else {
1027 kfree(qp->sq.wrid);
1028 kfree(qp->rq.wrid);
1029 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
1030 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI))
1031 free_proxy_bufs(&dev->ib_dev, qp);
1032 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
1033 if (qp->rq.wqe_cnt)
1034 mlx4_db_free(dev->dev, &qp->db);
1035 }
1036
1037 del_gid_entries(qp);
1038 }
1039
1040 static u32 get_sqp_num(struct mlx4_ib_dev *dev, struct ib_qp_init_attr *attr)
1041 {
1042 /* Native or PPF */
1043 if (!mlx4_is_mfunc(dev->dev) ||
1044 (mlx4_is_master(dev->dev) &&
1045 attr->create_flags & MLX4_IB_SRIOV_SQP)) {
1046 return dev->dev->phys_caps.base_sqpn +
1047 (attr->qp_type == IB_QPT_SMI ? 0 : 2) +
1048 attr->port_num - 1;
1049 }
1050 /* PF or VF -- creating proxies */
1051 if (attr->qp_type == IB_QPT_SMI)
1052 return dev->dev->caps.qp0_proxy[attr->port_num - 1];
1053 else
1054 return dev->dev->caps.qp1_proxy[attr->port_num - 1];
1055 }
1056
1057 struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd,
1058 struct ib_qp_init_attr *init_attr,
1059 struct ib_udata *udata)
1060 {
1061 struct mlx4_ib_qp *qp = NULL;
1062 int err;
1063 u16 xrcdn = 0;
1064 gfp_t gfp;
1065
1066 gfp = (init_attr->create_flags & MLX4_IB_QP_CREATE_USE_GFP_NOIO) ?
1067 GFP_NOIO : GFP_KERNEL;
1068 /*
1069 * We only support LSO, vendor flag1, and multicast loopback blocking,
1070 * and only for kernel UD QPs.
1071 */
1072 if (init_attr->create_flags & ~(MLX4_IB_QP_LSO |
1073 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK |
1074 MLX4_IB_SRIOV_TUNNEL_QP |
1075 MLX4_IB_SRIOV_SQP |
1076 MLX4_IB_QP_NETIF |
1077 MLX4_IB_QP_CREATE_USE_GFP_NOIO))
1078 return ERR_PTR(-EINVAL);
1079
1080 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) {
1081 if (init_attr->qp_type != IB_QPT_UD)
1082 return ERR_PTR(-EINVAL);
1083 }
1084
1085 if (init_attr->create_flags &&
1086 (udata ||
1087 ((init_attr->create_flags & ~(MLX4_IB_SRIOV_SQP | MLX4_IB_QP_CREATE_USE_GFP_NOIO)) &&
1088 init_attr->qp_type != IB_QPT_UD) ||
1089 ((init_attr->create_flags & MLX4_IB_SRIOV_SQP) &&
1090 init_attr->qp_type > IB_QPT_GSI)))
1091 return ERR_PTR(-EINVAL);
1092
1093 switch (init_attr->qp_type) {
1094 case IB_QPT_XRC_TGT:
1095 pd = to_mxrcd(init_attr->xrcd)->pd;
1096 xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn;
1097 init_attr->send_cq = to_mxrcd(init_attr->xrcd)->cq;
1098 /* fall through */
1099 case IB_QPT_XRC_INI:
1100 if (!(to_mdev(pd->device)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC))
1101 return ERR_PTR(-ENOSYS);
1102 init_attr->recv_cq = init_attr->send_cq;
1103 /* fall through */
1104 case IB_QPT_RC:
1105 case IB_QPT_UC:
1106 case IB_QPT_RAW_PACKET:
1107 qp = kzalloc(sizeof *qp, gfp);
1108 if (!qp)
1109 return ERR_PTR(-ENOMEM);
1110 qp->pri.vid = 0xFFFF;
1111 qp->alt.vid = 0xFFFF;
1112 /* fall through */
1113 case IB_QPT_UD:
1114 {
1115 err = create_qp_common(to_mdev(pd->device), pd, init_attr,
1116 udata, 0, &qp, gfp);
1117 if (err)
1118 return ERR_PTR(err);
1119
1120 qp->ibqp.qp_num = qp->mqp.qpn;
1121 qp->xrcdn = xrcdn;
1122
1123 break;
1124 }
1125 case IB_QPT_SMI:
1126 case IB_QPT_GSI:
1127 {
1128 /* Userspace is not allowed to create special QPs: */
1129 if (udata)
1130 return ERR_PTR(-EINVAL);
1131
1132 err = create_qp_common(to_mdev(pd->device), pd, init_attr, udata,
1133 get_sqp_num(to_mdev(pd->device), init_attr),
1134 &qp, gfp);
1135 if (err)
1136 return ERR_PTR(err);
1137
1138 qp->port = init_attr->port_num;
1139 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
1140
1141 break;
1142 }
1143 default:
1144 /* Don't support raw QPs */
1145 return ERR_PTR(-EINVAL);
1146 }
1147
1148 return &qp->ibqp;
1149 }
1150
1151 int mlx4_ib_destroy_qp(struct ib_qp *qp)
1152 {
1153 struct mlx4_ib_dev *dev = to_mdev(qp->device);
1154 struct mlx4_ib_qp *mqp = to_mqp(qp);
1155 struct mlx4_ib_pd *pd;
1156
1157 if (is_qp0(dev, mqp))
1158 mlx4_CLOSE_PORT(dev->dev, mqp->port);
1159
1160 if (dev->qp1_proxy[mqp->port - 1] == mqp) {
1161 mutex_lock(&dev->qp1_proxy_lock[mqp->port - 1]);
1162 dev->qp1_proxy[mqp->port - 1] = NULL;
1163 mutex_unlock(&dev->qp1_proxy_lock[mqp->port - 1]);
1164 }
1165
1166 pd = get_pd(mqp);
1167 destroy_qp_common(dev, mqp, !!pd->ibpd.uobject);
1168
1169 if (is_sqp(dev, mqp))
1170 kfree(to_msqp(mqp));
1171 else
1172 kfree(mqp);
1173
1174 return 0;
1175 }
1176
1177 static int to_mlx4_st(struct mlx4_ib_dev *dev, enum mlx4_ib_qp_type type)
1178 {
1179 switch (type) {
1180 case MLX4_IB_QPT_RC: return MLX4_QP_ST_RC;
1181 case MLX4_IB_QPT_UC: return MLX4_QP_ST_UC;
1182 case MLX4_IB_QPT_UD: return MLX4_QP_ST_UD;
1183 case MLX4_IB_QPT_XRC_INI:
1184 case MLX4_IB_QPT_XRC_TGT: return MLX4_QP_ST_XRC;
1185 case MLX4_IB_QPT_SMI:
1186 case MLX4_IB_QPT_GSI:
1187 case MLX4_IB_QPT_RAW_PACKET: return MLX4_QP_ST_MLX;
1188
1189 case MLX4_IB_QPT_PROXY_SMI_OWNER:
1190 case MLX4_IB_QPT_TUN_SMI_OWNER: return (mlx4_is_mfunc(dev->dev) ?
1191 MLX4_QP_ST_MLX : -1);
1192 case MLX4_IB_QPT_PROXY_SMI:
1193 case MLX4_IB_QPT_TUN_SMI:
1194 case MLX4_IB_QPT_PROXY_GSI:
1195 case MLX4_IB_QPT_TUN_GSI: return (mlx4_is_mfunc(dev->dev) ?
1196 MLX4_QP_ST_UD : -1);
1197 default: return -1;
1198 }
1199 }
1200
1201 static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, const struct ib_qp_attr *attr,
1202 int attr_mask)
1203 {
1204 u8 dest_rd_atomic;
1205 u32 access_flags;
1206 u32 hw_access_flags = 0;
1207
1208 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1209 dest_rd_atomic = attr->max_dest_rd_atomic;
1210 else
1211 dest_rd_atomic = qp->resp_depth;
1212
1213 if (attr_mask & IB_QP_ACCESS_FLAGS)
1214 access_flags = attr->qp_access_flags;
1215 else
1216 access_flags = qp->atomic_rd_en;
1217
1218 if (!dest_rd_atomic)
1219 access_flags &= IB_ACCESS_REMOTE_WRITE;
1220
1221 if (access_flags & IB_ACCESS_REMOTE_READ)
1222 hw_access_flags |= MLX4_QP_BIT_RRE;
1223 if (access_flags & IB_ACCESS_REMOTE_ATOMIC)
1224 hw_access_flags |= MLX4_QP_BIT_RAE;
1225 if (access_flags & IB_ACCESS_REMOTE_WRITE)
1226 hw_access_flags |= MLX4_QP_BIT_RWE;
1227
1228 return cpu_to_be32(hw_access_flags);
1229 }
1230
1231 static void store_sqp_attrs(struct mlx4_ib_sqp *sqp, const struct ib_qp_attr *attr,
1232 int attr_mask)
1233 {
1234 if (attr_mask & IB_QP_PKEY_INDEX)
1235 sqp->pkey_index = attr->pkey_index;
1236 if (attr_mask & IB_QP_QKEY)
1237 sqp->qkey = attr->qkey;
1238 if (attr_mask & IB_QP_SQ_PSN)
1239 sqp->send_psn = attr->sq_psn;
1240 }
1241
1242 static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port)
1243 {
1244 path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6);
1245 }
1246
1247 static int _mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah,
1248 u64 smac, u16 vlan_tag, struct mlx4_qp_path *path,
1249 struct mlx4_roce_smac_vlan_info *smac_info, u8 port)
1250 {
1251 int is_eth = rdma_port_get_link_layer(&dev->ib_dev, port) ==
1252 IB_LINK_LAYER_ETHERNET;
1253 int vidx;
1254 int smac_index;
1255 int err;
1256
1257
1258 path->grh_mylmc = ah->src_path_bits & 0x7f;
1259 path->rlid = cpu_to_be16(ah->dlid);
1260 if (ah->static_rate) {
1261 path->static_rate = ah->static_rate + MLX4_STAT_RATE_OFFSET;
1262 while (path->static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
1263 !(1 << path->static_rate & dev->dev->caps.stat_rate_support))
1264 --path->static_rate;
1265 } else
1266 path->static_rate = 0;
1267
1268 if (ah->ah_flags & IB_AH_GRH) {
1269 if (ah->grh.sgid_index >= dev->dev->caps.gid_table_len[port]) {
1270 pr_err("sgid_index (%u) too large. max is %d\n",
1271 ah->grh.sgid_index, dev->dev->caps.gid_table_len[port] - 1);
1272 return -1;
1273 }
1274
1275 path->grh_mylmc |= 1 << 7;
1276 path->mgid_index = ah->grh.sgid_index;
1277 path->hop_limit = ah->grh.hop_limit;
1278 path->tclass_flowlabel =
1279 cpu_to_be32((ah->grh.traffic_class << 20) |
1280 (ah->grh.flow_label));
1281 memcpy(path->rgid, ah->grh.dgid.raw, 16);
1282 }
1283
1284 if (is_eth) {
1285 if (!(ah->ah_flags & IB_AH_GRH))
1286 return -1;
1287
1288 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
1289 ((port - 1) << 6) | ((ah->sl & 7) << 3);
1290
1291 path->feup |= MLX4_FEUP_FORCE_ETH_UP;
1292 if (vlan_tag < 0x1000) {
1293 if (smac_info->vid < 0x1000) {
1294 /* both valid vlan ids */
1295 if (smac_info->vid != vlan_tag) {
1296 /* different VIDs. unreg old and reg new */
1297 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx);
1298 if (err)
1299 return err;
1300 smac_info->candidate_vid = vlan_tag;
1301 smac_info->candidate_vlan_index = vidx;
1302 smac_info->candidate_vlan_port = port;
1303 smac_info->update_vid = 1;
1304 path->vlan_index = vidx;
1305 } else {
1306 path->vlan_index = smac_info->vlan_index;
1307 }
1308 } else {
1309 /* no current vlan tag in qp */
1310 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx);
1311 if (err)
1312 return err;
1313 smac_info->candidate_vid = vlan_tag;
1314 smac_info->candidate_vlan_index = vidx;
1315 smac_info->candidate_vlan_port = port;
1316 smac_info->update_vid = 1;
1317 path->vlan_index = vidx;
1318 }
1319 path->feup |= MLX4_FVL_FORCE_ETH_VLAN;
1320 path->fl = 1 << 6;
1321 } else {
1322 /* have current vlan tag. unregister it at modify-qp success */
1323 if (smac_info->vid < 0x1000) {
1324 smac_info->candidate_vid = 0xFFFF;
1325 smac_info->update_vid = 1;
1326 }
1327 }
1328
1329 /* get smac_index for RoCE use.
1330 * If no smac was yet assigned, register one.
1331 * If one was already assigned, but the new mac differs,
1332 * unregister the old one and register the new one.
1333 */
1334 if ((!smac_info->smac && !smac_info->smac_port) ||
1335 smac_info->smac != smac) {
1336 /* register candidate now, unreg if needed, after success */
1337 smac_index = mlx4_register_mac(dev->dev, port, smac);
1338 if (smac_index >= 0) {
1339 smac_info->candidate_smac_index = smac_index;
1340 smac_info->candidate_smac = smac;
1341 smac_info->candidate_smac_port = port;
1342 } else {
1343 return -EINVAL;
1344 }
1345 } else {
1346 smac_index = smac_info->smac_index;
1347 }
1348
1349 memcpy(path->dmac, ah->dmac, 6);
1350 path->ackto = MLX4_IB_LINK_TYPE_ETH;
1351 /* put MAC table smac index for IBoE */
1352 path->grh_mylmc = (u8) (smac_index) | 0x80;
1353 } else {
1354 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
1355 ((port - 1) << 6) | ((ah->sl & 0xf) << 2);
1356 }
1357
1358 return 0;
1359 }
1360
1361 static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_qp_attr *qp,
1362 enum ib_qp_attr_mask qp_attr_mask,
1363 struct mlx4_ib_qp *mqp,
1364 struct mlx4_qp_path *path, u8 port)
1365 {
1366 return _mlx4_set_path(dev, &qp->ah_attr,
1367 mlx4_mac_to_u64((u8 *)qp->smac),
1368 (qp_attr_mask & IB_QP_VID) ? qp->vlan_id : 0xffff,
1369 path, &mqp->pri, port);
1370 }
1371
1372 static int mlx4_set_alt_path(struct mlx4_ib_dev *dev,
1373 const struct ib_qp_attr *qp,
1374 enum ib_qp_attr_mask qp_attr_mask,
1375 struct mlx4_ib_qp *mqp,
1376 struct mlx4_qp_path *path, u8 port)
1377 {
1378 return _mlx4_set_path(dev, &qp->alt_ah_attr,
1379 mlx4_mac_to_u64((u8 *)qp->alt_smac),
1380 (qp_attr_mask & IB_QP_ALT_VID) ?
1381 qp->alt_vlan_id : 0xffff,
1382 path, &mqp->alt, port);
1383 }
1384
1385 static void update_mcg_macs(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
1386 {
1387 struct mlx4_ib_gid_entry *ge, *tmp;
1388
1389 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
1390 if (!ge->added && mlx4_ib_add_mc(dev, qp, &ge->gid)) {
1391 ge->added = 1;
1392 ge->port = qp->port;
1393 }
1394 }
1395 }
1396
1397 static int handle_eth_ud_smac_index(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp, u8 *smac,
1398 struct mlx4_qp_context *context)
1399 {
1400 u64 u64_mac;
1401 int smac_index;
1402
1403 u64_mac = atomic64_read(&dev->iboe.mac[qp->port - 1]);
1404
1405 context->pri_path.sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | ((qp->port - 1) << 6);
1406 if (!qp->pri.smac && !qp->pri.smac_port) {
1407 smac_index = mlx4_register_mac(dev->dev, qp->port, u64_mac);
1408 if (smac_index >= 0) {
1409 qp->pri.candidate_smac_index = smac_index;
1410 qp->pri.candidate_smac = u64_mac;
1411 qp->pri.candidate_smac_port = qp->port;
1412 context->pri_path.grh_mylmc = 0x80 | (u8) smac_index;
1413 } else {
1414 return -ENOENT;
1415 }
1416 }
1417 return 0;
1418 }
1419
1420 static int __mlx4_ib_modify_qp(struct ib_qp *ibqp,
1421 const struct ib_qp_attr *attr, int attr_mask,
1422 enum ib_qp_state cur_state, enum ib_qp_state new_state)
1423 {
1424 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
1425 struct mlx4_ib_qp *qp = to_mqp(ibqp);
1426 struct mlx4_ib_pd *pd;
1427 struct mlx4_ib_cq *send_cq, *recv_cq;
1428 struct mlx4_qp_context *context;
1429 enum mlx4_qp_optpar optpar = 0;
1430 int sqd_event;
1431 int steer_qp = 0;
1432 int err = -EINVAL;
1433
1434 /* APM is not supported under RoCE */
1435 if (attr_mask & IB_QP_ALT_PATH &&
1436 rdma_port_get_link_layer(&dev->ib_dev, qp->port) ==
1437 IB_LINK_LAYER_ETHERNET)
1438 return -ENOTSUPP;
1439
1440 context = kzalloc(sizeof *context, GFP_KERNEL);
1441 if (!context)
1442 return -ENOMEM;
1443
1444 context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) |
1445 (to_mlx4_st(dev, qp->mlx4_ib_qp_type) << 16));
1446
1447 if (!(attr_mask & IB_QP_PATH_MIG_STATE))
1448 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
1449 else {
1450 optpar |= MLX4_QP_OPTPAR_PM_STATE;
1451 switch (attr->path_mig_state) {
1452 case IB_MIG_MIGRATED:
1453 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
1454 break;
1455 case IB_MIG_REARM:
1456 context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11);
1457 break;
1458 case IB_MIG_ARMED:
1459 context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11);
1460 break;
1461 }
1462 }
1463
1464 if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI)
1465 context->mtu_msgmax = (IB_MTU_4096 << 5) | 11;
1466 else if (ibqp->qp_type == IB_QPT_RAW_PACKET)
1467 context->mtu_msgmax = (MLX4_RAW_QP_MTU << 5) | MLX4_RAW_QP_MSGMAX;
1468 else if (ibqp->qp_type == IB_QPT_UD) {
1469 if (qp->flags & MLX4_IB_QP_LSO)
1470 context->mtu_msgmax = (IB_MTU_4096 << 5) |
1471 ilog2(dev->dev->caps.max_gso_sz);
1472 else
1473 context->mtu_msgmax = (IB_MTU_4096 << 5) | 12;
1474 } else if (attr_mask & IB_QP_PATH_MTU) {
1475 if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) {
1476 pr_err("path MTU (%u) is invalid\n",
1477 attr->path_mtu);
1478 goto out;
1479 }
1480 context->mtu_msgmax = (attr->path_mtu << 5) |
1481 ilog2(dev->dev->caps.max_msg_sz);
1482 }
1483
1484 if (qp->rq.wqe_cnt)
1485 context->rq_size_stride = ilog2(qp->rq.wqe_cnt) << 3;
1486 context->rq_size_stride |= qp->rq.wqe_shift - 4;
1487
1488 if (qp->sq.wqe_cnt)
1489 context->sq_size_stride = ilog2(qp->sq.wqe_cnt) << 3;
1490 context->sq_size_stride |= qp->sq.wqe_shift - 4;
1491
1492 if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
1493 context->sq_size_stride |= !!qp->sq_no_prefetch << 7;
1494 context->xrcd = cpu_to_be32((u32) qp->xrcdn);
1495 if (ibqp->qp_type == IB_QPT_RAW_PACKET)
1496 context->param3 |= cpu_to_be32(1 << 30);
1497 }
1498
1499 if (qp->ibqp.uobject)
1500 context->usr_page = cpu_to_be32(to_mucontext(ibqp->uobject->context)->uar.index);
1501 else
1502 context->usr_page = cpu_to_be32(dev->priv_uar.index);
1503
1504 if (attr_mask & IB_QP_DEST_QPN)
1505 context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
1506
1507 if (attr_mask & IB_QP_PORT) {
1508 if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD &&
1509 !(attr_mask & IB_QP_AV)) {
1510 mlx4_set_sched(&context->pri_path, attr->port_num);
1511 optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE;
1512 }
1513 }
1514
1515 if (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) {
1516 if (dev->counters[qp->port - 1] != -1) {
1517 context->pri_path.counter_index =
1518 dev->counters[qp->port - 1];
1519 optpar |= MLX4_QP_OPTPAR_COUNTER_INDEX;
1520 } else
1521 context->pri_path.counter_index = 0xff;
1522
1523 if (qp->flags & MLX4_IB_QP_NETIF) {
1524 mlx4_ib_steer_qp_reg(dev, qp, 1);
1525 steer_qp = 1;
1526 }
1527 }
1528
1529 if (attr_mask & IB_QP_PKEY_INDEX) {
1530 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1531 context->pri_path.disable_pkey_check = 0x40;
1532 context->pri_path.pkey_index = attr->pkey_index;
1533 optpar |= MLX4_QP_OPTPAR_PKEY_INDEX;
1534 }
1535
1536 if (attr_mask & IB_QP_AV) {
1537 if (mlx4_set_path(dev, attr, attr_mask, qp, &context->pri_path,
1538 attr_mask & IB_QP_PORT ?
1539 attr->port_num : qp->port))
1540 goto out;
1541
1542 optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH |
1543 MLX4_QP_OPTPAR_SCHED_QUEUE);
1544 }
1545
1546 if (attr_mask & IB_QP_TIMEOUT) {
1547 context->pri_path.ackto |= attr->timeout << 3;
1548 optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT;
1549 }
1550
1551 if (attr_mask & IB_QP_ALT_PATH) {
1552 if (attr->alt_port_num == 0 ||
1553 attr->alt_port_num > dev->dev->caps.num_ports)
1554 goto out;
1555
1556 if (attr->alt_pkey_index >=
1557 dev->dev->caps.pkey_table_len[attr->alt_port_num])
1558 goto out;
1559
1560 if (mlx4_set_alt_path(dev, attr, attr_mask, qp,
1561 &context->alt_path,
1562 attr->alt_port_num))
1563 goto out;
1564
1565 context->alt_path.pkey_index = attr->alt_pkey_index;
1566 context->alt_path.ackto = attr->alt_timeout << 3;
1567 optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH;
1568 }
1569
1570 pd = get_pd(qp);
1571 get_cqs(qp, &send_cq, &recv_cq);
1572 context->pd = cpu_to_be32(pd->pdn);
1573 context->cqn_send = cpu_to_be32(send_cq->mcq.cqn);
1574 context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn);
1575 context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28);
1576
1577 /* Set "fast registration enabled" for all kernel QPs */
1578 if (!qp->ibqp.uobject)
1579 context->params1 |= cpu_to_be32(1 << 11);
1580
1581 if (attr_mask & IB_QP_RNR_RETRY) {
1582 context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
1583 optpar |= MLX4_QP_OPTPAR_RNR_RETRY;
1584 }
1585
1586 if (attr_mask & IB_QP_RETRY_CNT) {
1587 context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
1588 optpar |= MLX4_QP_OPTPAR_RETRY_COUNT;
1589 }
1590
1591 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1592 if (attr->max_rd_atomic)
1593 context->params1 |=
1594 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
1595 optpar |= MLX4_QP_OPTPAR_SRA_MAX;
1596 }
1597
1598 if (attr_mask & IB_QP_SQ_PSN)
1599 context->next_send_psn = cpu_to_be32(attr->sq_psn);
1600
1601 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1602 if (attr->max_dest_rd_atomic)
1603 context->params2 |=
1604 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
1605 optpar |= MLX4_QP_OPTPAR_RRA_MAX;
1606 }
1607
1608 if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) {
1609 context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask);
1610 optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE;
1611 }
1612
1613 if (ibqp->srq)
1614 context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC);
1615
1616 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
1617 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
1618 optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT;
1619 }
1620 if (attr_mask & IB_QP_RQ_PSN)
1621 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
1622
1623 /* proxy and tunnel qp qkeys will be changed in modify-qp wrappers */
1624 if (attr_mask & IB_QP_QKEY) {
1625 if (qp->mlx4_ib_qp_type &
1626 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))
1627 context->qkey = cpu_to_be32(IB_QP_SET_QKEY);
1628 else {
1629 if (mlx4_is_mfunc(dev->dev) &&
1630 !(qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) &&
1631 (attr->qkey & MLX4_RESERVED_QKEY_MASK) ==
1632 MLX4_RESERVED_QKEY_BASE) {
1633 pr_err("Cannot use reserved QKEY"
1634 " 0x%x (range 0xffff0000..0xffffffff"
1635 " is reserved)\n", attr->qkey);
1636 err = -EINVAL;
1637 goto out;
1638 }
1639 context->qkey = cpu_to_be32(attr->qkey);
1640 }
1641 optpar |= MLX4_QP_OPTPAR_Q_KEY;
1642 }
1643
1644 if (ibqp->srq)
1645 context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn);
1646
1647 if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1648 context->db_rec_addr = cpu_to_be64(qp->db.dma);
1649
1650 if (cur_state == IB_QPS_INIT &&
1651 new_state == IB_QPS_RTR &&
1652 (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
1653 ibqp->qp_type == IB_QPT_UD ||
1654 ibqp->qp_type == IB_QPT_RAW_PACKET)) {
1655 context->pri_path.sched_queue = (qp->port - 1) << 6;
1656 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
1657 qp->mlx4_ib_qp_type &
1658 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) {
1659 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE;
1660 if (qp->mlx4_ib_qp_type != MLX4_IB_QPT_SMI)
1661 context->pri_path.fl = 0x80;
1662 } else {
1663 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1664 context->pri_path.fl = 0x80;
1665 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE;
1666 }
1667 if (rdma_port_get_link_layer(&dev->ib_dev, qp->port) ==
1668 IB_LINK_LAYER_ETHERNET) {
1669 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI ||
1670 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI)
1671 context->pri_path.feup = 1 << 7; /* don't fsm */
1672 /* handle smac_index */
1673 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_UD ||
1674 qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI ||
1675 qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI) {
1676 err = handle_eth_ud_smac_index(dev, qp, (u8 *)attr->smac, context);
1677 if (err)
1678 return -EINVAL;
1679 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI)
1680 dev->qp1_proxy[qp->port - 1] = qp;
1681 }
1682 }
1683 }
1684
1685 if (qp->ibqp.qp_type == IB_QPT_RAW_PACKET) {
1686 context->pri_path.ackto = (context->pri_path.ackto & 0xf8) |
1687 MLX4_IB_LINK_TYPE_ETH;
1688 if (dev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
1689 /* set QP to receive both tunneled & non-tunneled packets */
1690 if (!(context->flags & cpu_to_be32(1 << MLX4_RSS_QPC_FLAG_OFFSET)))
1691 context->srqn = cpu_to_be32(7 << 28);
1692 }
1693 }
1694
1695 if (ibqp->qp_type == IB_QPT_UD && (new_state == IB_QPS_RTR)) {
1696 int is_eth = rdma_port_get_link_layer(
1697 &dev->ib_dev, qp->port) ==
1698 IB_LINK_LAYER_ETHERNET;
1699 if (is_eth) {
1700 context->pri_path.ackto = MLX4_IB_LINK_TYPE_ETH;
1701 optpar |= MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH;
1702 }
1703 }
1704
1705
1706 if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD &&
1707 attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
1708 sqd_event = 1;
1709 else
1710 sqd_event = 0;
1711
1712 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1713 context->rlkey |= (1 << 4);
1714
1715 /*
1716 * Before passing a kernel QP to the HW, make sure that the
1717 * ownership bits of the send queue are set and the SQ
1718 * headroom is stamped so that the hardware doesn't start
1719 * processing stale work requests.
1720 */
1721 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
1722 struct mlx4_wqe_ctrl_seg *ctrl;
1723 int i;
1724
1725 for (i = 0; i < qp->sq.wqe_cnt; ++i) {
1726 ctrl = get_send_wqe(qp, i);
1727 ctrl->owner_opcode = cpu_to_be32(1 << 31);
1728 if (qp->sq_max_wqes_per_wr == 1)
1729 ctrl->fence_size = 1 << (qp->sq.wqe_shift - 4);
1730
1731 stamp_send_wqe(qp, i, 1 << qp->sq.wqe_shift);
1732 }
1733 }
1734
1735 err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state),
1736 to_mlx4_state(new_state), context, optpar,
1737 sqd_event, &qp->mqp);
1738 if (err)
1739 goto out;
1740
1741 qp->state = new_state;
1742
1743 if (attr_mask & IB_QP_ACCESS_FLAGS)
1744 qp->atomic_rd_en = attr->qp_access_flags;
1745 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1746 qp->resp_depth = attr->max_dest_rd_atomic;
1747 if (attr_mask & IB_QP_PORT) {
1748 qp->port = attr->port_num;
1749 update_mcg_macs(dev, qp);
1750 }
1751 if (attr_mask & IB_QP_ALT_PATH)
1752 qp->alt_port = attr->alt_port_num;
1753
1754 if (is_sqp(dev, qp))
1755 store_sqp_attrs(to_msqp(qp), attr, attr_mask);
1756
1757 /*
1758 * If we moved QP0 to RTR, bring the IB link up; if we moved
1759 * QP0 to RESET or ERROR, bring the link back down.
1760 */
1761 if (is_qp0(dev, qp)) {
1762 if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR)
1763 if (mlx4_INIT_PORT(dev->dev, qp->port))
1764 pr_warn("INIT_PORT failed for port %d\n",
1765 qp->port);
1766
1767 if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR &&
1768 (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR))
1769 mlx4_CLOSE_PORT(dev->dev, qp->port);
1770 }
1771
1772 /*
1773 * If we moved a kernel QP to RESET, clean up all old CQ
1774 * entries and reinitialize the QP.
1775 */
1776 if (new_state == IB_QPS_RESET) {
1777 if (!ibqp->uobject) {
1778 mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
1779 ibqp->srq ? to_msrq(ibqp->srq) : NULL);
1780 if (send_cq != recv_cq)
1781 mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1782
1783 qp->rq.head = 0;
1784 qp->rq.tail = 0;
1785 qp->sq.head = 0;
1786 qp->sq.tail = 0;
1787 qp->sq_next_wqe = 0;
1788 if (qp->rq.wqe_cnt)
1789 *qp->db.db = 0;
1790
1791 if (qp->flags & MLX4_IB_QP_NETIF)
1792 mlx4_ib_steer_qp_reg(dev, qp, 0);
1793 }
1794 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) {
1795 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
1796 qp->pri.smac = 0;
1797 qp->pri.smac_port = 0;
1798 }
1799 if (qp->alt.smac) {
1800 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
1801 qp->alt.smac = 0;
1802 }
1803 if (qp->pri.vid < 0x1000) {
1804 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid);
1805 qp->pri.vid = 0xFFFF;
1806 qp->pri.candidate_vid = 0xFFFF;
1807 qp->pri.update_vid = 0;
1808 }
1809
1810 if (qp->alt.vid < 0x1000) {
1811 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid);
1812 qp->alt.vid = 0xFFFF;
1813 qp->alt.candidate_vid = 0xFFFF;
1814 qp->alt.update_vid = 0;
1815 }
1816 }
1817 out:
1818 if (err && steer_qp)
1819 mlx4_ib_steer_qp_reg(dev, qp, 0);
1820 kfree(context);
1821 if (qp->pri.candidate_smac ||
1822 (!qp->pri.candidate_smac && qp->pri.candidate_smac_port)) {
1823 if (err) {
1824 mlx4_unregister_mac(dev->dev, qp->pri.candidate_smac_port, qp->pri.candidate_smac);
1825 } else {
1826 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port))
1827 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
1828 qp->pri.smac = qp->pri.candidate_smac;
1829 qp->pri.smac_index = qp->pri.candidate_smac_index;
1830 qp->pri.smac_port = qp->pri.candidate_smac_port;
1831 }
1832 qp->pri.candidate_smac = 0;
1833 qp->pri.candidate_smac_index = 0;
1834 qp->pri.candidate_smac_port = 0;
1835 }
1836 if (qp->alt.candidate_smac) {
1837 if (err) {
1838 mlx4_unregister_mac(dev->dev, qp->alt.candidate_smac_port, qp->alt.candidate_smac);
1839 } else {
1840 if (qp->alt.smac)
1841 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
1842 qp->alt.smac = qp->alt.candidate_smac;
1843 qp->alt.smac_index = qp->alt.candidate_smac_index;
1844 qp->alt.smac_port = qp->alt.candidate_smac_port;
1845 }
1846 qp->alt.candidate_smac = 0;
1847 qp->alt.candidate_smac_index = 0;
1848 qp->alt.candidate_smac_port = 0;
1849 }
1850
1851 if (qp->pri.update_vid) {
1852 if (err) {
1853 if (qp->pri.candidate_vid < 0x1000)
1854 mlx4_unregister_vlan(dev->dev, qp->pri.candidate_vlan_port,
1855 qp->pri.candidate_vid);
1856 } else {
1857 if (qp->pri.vid < 0x1000)
1858 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port,
1859 qp->pri.vid);
1860 qp->pri.vid = qp->pri.candidate_vid;
1861 qp->pri.vlan_port = qp->pri.candidate_vlan_port;
1862 qp->pri.vlan_index = qp->pri.candidate_vlan_index;
1863 }
1864 qp->pri.candidate_vid = 0xFFFF;
1865 qp->pri.update_vid = 0;
1866 }
1867
1868 if (qp->alt.update_vid) {
1869 if (err) {
1870 if (qp->alt.candidate_vid < 0x1000)
1871 mlx4_unregister_vlan(dev->dev, qp->alt.candidate_vlan_port,
1872 qp->alt.candidate_vid);
1873 } else {
1874 if (qp->alt.vid < 0x1000)
1875 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port,
1876 qp->alt.vid);
1877 qp->alt.vid = qp->alt.candidate_vid;
1878 qp->alt.vlan_port = qp->alt.candidate_vlan_port;
1879 qp->alt.vlan_index = qp->alt.candidate_vlan_index;
1880 }
1881 qp->alt.candidate_vid = 0xFFFF;
1882 qp->alt.update_vid = 0;
1883 }
1884
1885 return err;
1886 }
1887
1888 int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1889 int attr_mask, struct ib_udata *udata)
1890 {
1891 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
1892 struct mlx4_ib_qp *qp = to_mqp(ibqp);
1893 enum ib_qp_state cur_state, new_state;
1894 int err = -EINVAL;
1895 int ll;
1896 mutex_lock(&qp->mutex);
1897
1898 cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
1899 new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
1900
1901 if (cur_state == new_state && cur_state == IB_QPS_RESET) {
1902 ll = IB_LINK_LAYER_UNSPECIFIED;
1903 } else {
1904 int port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1905 ll = rdma_port_get_link_layer(&dev->ib_dev, port);
1906 }
1907
1908 if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
1909 attr_mask, ll)) {
1910 pr_debug("qpn 0x%x: invalid attribute mask specified "
1911 "for transition %d to %d. qp_type %d,"
1912 " attr_mask 0x%x\n",
1913 ibqp->qp_num, cur_state, new_state,
1914 ibqp->qp_type, attr_mask);
1915 goto out;
1916 }
1917
1918 if ((attr_mask & IB_QP_PORT) &&
1919 (attr->port_num == 0 || attr->port_num > dev->num_ports)) {
1920 pr_debug("qpn 0x%x: invalid port number (%d) specified "
1921 "for transition %d to %d. qp_type %d\n",
1922 ibqp->qp_num, attr->port_num, cur_state,
1923 new_state, ibqp->qp_type);
1924 goto out;
1925 }
1926
1927 if ((attr_mask & IB_QP_PORT) && (ibqp->qp_type == IB_QPT_RAW_PACKET) &&
1928 (rdma_port_get_link_layer(&dev->ib_dev, attr->port_num) !=
1929 IB_LINK_LAYER_ETHERNET))
1930 goto out;
1931
1932 if (attr_mask & IB_QP_PKEY_INDEX) {
1933 int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1934 if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) {
1935 pr_debug("qpn 0x%x: invalid pkey index (%d) specified "
1936 "for transition %d to %d. qp_type %d\n",
1937 ibqp->qp_num, attr->pkey_index, cur_state,
1938 new_state, ibqp->qp_type);
1939 goto out;
1940 }
1941 }
1942
1943 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
1944 attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) {
1945 pr_debug("qpn 0x%x: max_rd_atomic (%d) too large. "
1946 "Transition %d to %d. qp_type %d\n",
1947 ibqp->qp_num, attr->max_rd_atomic, cur_state,
1948 new_state, ibqp->qp_type);
1949 goto out;
1950 }
1951
1952 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
1953 attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) {
1954 pr_debug("qpn 0x%x: max_dest_rd_atomic (%d) too large. "
1955 "Transition %d to %d. qp_type %d\n",
1956 ibqp->qp_num, attr->max_dest_rd_atomic, cur_state,
1957 new_state, ibqp->qp_type);
1958 goto out;
1959 }
1960
1961 if (cur_state == new_state && cur_state == IB_QPS_RESET) {
1962 err = 0;
1963 goto out;
1964 }
1965
1966 err = __mlx4_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state);
1967
1968 out:
1969 mutex_unlock(&qp->mutex);
1970 return err;
1971 }
1972
1973 static int vf_get_qp0_qkey(struct mlx4_dev *dev, int qpn, u32 *qkey)
1974 {
1975 int i;
1976 for (i = 0; i < dev->caps.num_ports; i++) {
1977 if (qpn == dev->caps.qp0_proxy[i] ||
1978 qpn == dev->caps.qp0_tunnel[i]) {
1979 *qkey = dev->caps.qp0_qkey[i];
1980 return 0;
1981 }
1982 }
1983 return -EINVAL;
1984 }
1985
1986 static int build_sriov_qp0_header(struct mlx4_ib_sqp *sqp,
1987 struct ib_send_wr *wr,
1988 void *wqe, unsigned *mlx_seg_len)
1989 {
1990 struct mlx4_ib_dev *mdev = to_mdev(sqp->qp.ibqp.device);
1991 struct ib_device *ib_dev = &mdev->ib_dev;
1992 struct mlx4_wqe_mlx_seg *mlx = wqe;
1993 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
1994 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
1995 u16 pkey;
1996 u32 qkey;
1997 int send_size;
1998 int header_size;
1999 int spc;
2000 int i;
2001
2002 if (wr->opcode != IB_WR_SEND)
2003 return -EINVAL;
2004
2005 send_size = 0;
2006
2007 for (i = 0; i < wr->num_sge; ++i)
2008 send_size += wr->sg_list[i].length;
2009
2010 /* for proxy-qp0 sends, need to add in size of tunnel header */
2011 /* for tunnel-qp0 sends, tunnel header is already in s/g list */
2012 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER)
2013 send_size += sizeof (struct mlx4_ib_tunnel_header);
2014
2015 ib_ud_header_init(send_size, 1, 0, 0, 0, 0, &sqp->ud_header);
2016
2017 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) {
2018 sqp->ud_header.lrh.service_level =
2019 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
2020 sqp->ud_header.lrh.destination_lid =
2021 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2022 sqp->ud_header.lrh.source_lid =
2023 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2024 }
2025
2026 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
2027
2028 /* force loopback */
2029 mlx->flags |= cpu_to_be32(MLX4_WQE_MLX_VL15 | 0x1 | MLX4_WQE_MLX_SLR);
2030 mlx->rlid = sqp->ud_header.lrh.destination_lid;
2031
2032 sqp->ud_header.lrh.virtual_lane = 0;
2033 sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
2034 ib_get_cached_pkey(ib_dev, sqp->qp.port, 0, &pkey);
2035 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
2036 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_TUN_SMI_OWNER)
2037 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2038 else
2039 sqp->ud_header.bth.destination_qpn =
2040 cpu_to_be32(mdev->dev->caps.qp0_tunnel[sqp->qp.port - 1]);
2041
2042 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
2043 if (mlx4_is_master(mdev->dev)) {
2044 if (mlx4_get_parav_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
2045 return -EINVAL;
2046 } else {
2047 if (vf_get_qp0_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
2048 return -EINVAL;
2049 }
2050 sqp->ud_header.deth.qkey = cpu_to_be32(qkey);
2051 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.mqp.qpn);
2052
2053 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
2054 sqp->ud_header.immediate_present = 0;
2055
2056 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
2057
2058 /*
2059 * Inline data segments may not cross a 64 byte boundary. If
2060 * our UD header is bigger than the space available up to the
2061 * next 64 byte boundary in the WQE, use two inline data
2062 * segments to hold the UD header.
2063 */
2064 spc = MLX4_INLINE_ALIGN -
2065 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2066 if (header_size <= spc) {
2067 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
2068 memcpy(inl + 1, sqp->header_buf, header_size);
2069 i = 1;
2070 } else {
2071 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2072 memcpy(inl + 1, sqp->header_buf, spc);
2073
2074 inl = (void *) (inl + 1) + spc;
2075 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
2076 /*
2077 * Need a barrier here to make sure all the data is
2078 * visible before the byte_count field is set.
2079 * Otherwise the HCA prefetcher could grab the 64-byte
2080 * chunk with this inline segment and get a valid (!=
2081 * 0xffffffff) byte count but stale data, and end up
2082 * generating a packet with bad headers.
2083 *
2084 * The first inline segment's byte_count field doesn't
2085 * need a barrier, because it comes after a
2086 * control/MLX segment and therefore is at an offset
2087 * of 16 mod 64.
2088 */
2089 wmb();
2090 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
2091 i = 2;
2092 }
2093
2094 *mlx_seg_len =
2095 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
2096 return 0;
2097 }
2098
2099 static void mlx4_u64_to_smac(u8 *dst_mac, u64 src_mac)
2100 {
2101 int i;
2102
2103 for (i = ETH_ALEN; i; i--) {
2104 dst_mac[i - 1] = src_mac & 0xff;
2105 src_mac >>= 8;
2106 }
2107 }
2108
2109 static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
2110 void *wqe, unsigned *mlx_seg_len)
2111 {
2112 struct ib_device *ib_dev = sqp->qp.ibqp.device;
2113 struct mlx4_wqe_mlx_seg *mlx = wqe;
2114 struct mlx4_wqe_ctrl_seg *ctrl = wqe;
2115 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
2116 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2117 union ib_gid sgid;
2118 u16 pkey;
2119 int send_size;
2120 int header_size;
2121 int spc;
2122 int i;
2123 int err = 0;
2124 u16 vlan = 0xffff;
2125 bool is_eth;
2126 bool is_vlan = false;
2127 bool is_grh;
2128
2129 send_size = 0;
2130 for (i = 0; i < wr->num_sge; ++i)
2131 send_size += wr->sg_list[i].length;
2132
2133 is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET;
2134 is_grh = mlx4_ib_ah_grh_present(ah);
2135 if (is_eth) {
2136 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2137 /* When multi-function is enabled, the ib_core gid
2138 * indexes don't necessarily match the hw ones, so
2139 * we must use our own cache */
2140 err = mlx4_get_roce_gid_from_slave(to_mdev(ib_dev)->dev,
2141 be32_to_cpu(ah->av.ib.port_pd) >> 24,
2142 ah->av.ib.gid_index, &sgid.raw[0]);
2143 if (err)
2144 return err;
2145 } else {
2146 err = ib_get_cached_gid(ib_dev,
2147 be32_to_cpu(ah->av.ib.port_pd) >> 24,
2148 ah->av.ib.gid_index, &sgid);
2149 if (err)
2150 return err;
2151 }
2152
2153 if (ah->av.eth.vlan != cpu_to_be16(0xffff)) {
2154 vlan = be16_to_cpu(ah->av.eth.vlan) & 0x0fff;
2155 is_vlan = 1;
2156 }
2157 }
2158 ib_ud_header_init(send_size, !is_eth, is_eth, is_vlan, is_grh, 0, &sqp->ud_header);
2159
2160 if (!is_eth) {
2161 sqp->ud_header.lrh.service_level =
2162 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
2163 sqp->ud_header.lrh.destination_lid = ah->av.ib.dlid;
2164 sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2165 }
2166
2167 if (is_grh) {
2168 sqp->ud_header.grh.traffic_class =
2169 (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff;
2170 sqp->ud_header.grh.flow_label =
2171 ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
2172 sqp->ud_header.grh.hop_limit = ah->av.ib.hop_limit;
2173 if (is_eth)
2174 memcpy(sqp->ud_header.grh.source_gid.raw, sgid.raw, 16);
2175 else {
2176 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2177 /* When multi-function is enabled, the ib_core gid
2178 * indexes don't necessarily match the hw ones, so
2179 * we must use our own cache */
2180 sqp->ud_header.grh.source_gid.global.subnet_prefix =
2181 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
2182 subnet_prefix;
2183 sqp->ud_header.grh.source_gid.global.interface_id =
2184 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
2185 guid_cache[ah->av.ib.gid_index];
2186 } else
2187 ib_get_cached_gid(ib_dev,
2188 be32_to_cpu(ah->av.ib.port_pd) >> 24,
2189 ah->av.ib.gid_index,
2190 &sqp->ud_header.grh.source_gid);
2191 }
2192 memcpy(sqp->ud_header.grh.destination_gid.raw,
2193 ah->av.ib.dgid, 16);
2194 }
2195
2196 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
2197
2198 if (!is_eth) {
2199 mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) |
2200 (sqp->ud_header.lrh.destination_lid ==
2201 IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) |
2202 (sqp->ud_header.lrh.service_level << 8));
2203 if (ah->av.ib.port_pd & cpu_to_be32(0x80000000))
2204 mlx->flags |= cpu_to_be32(0x1); /* force loopback */
2205 mlx->rlid = sqp->ud_header.lrh.destination_lid;
2206 }
2207
2208 switch (wr->opcode) {
2209 case IB_WR_SEND:
2210 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
2211 sqp->ud_header.immediate_present = 0;
2212 break;
2213 case IB_WR_SEND_WITH_IMM:
2214 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
2215 sqp->ud_header.immediate_present = 1;
2216 sqp->ud_header.immediate_data = wr->ex.imm_data;
2217 break;
2218 default:
2219 return -EINVAL;
2220 }
2221
2222 if (is_eth) {
2223 struct in6_addr in6;
2224
2225 u16 pcp = (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 29) << 13;
2226
2227 mlx->sched_prio = cpu_to_be16(pcp);
2228
2229 memcpy(sqp->ud_header.eth.dmac_h, ah->av.eth.mac, 6);
2230 /* FIXME: cache smac value? */
2231 memcpy(&ctrl->srcrb_flags16[0], ah->av.eth.mac, 2);
2232 memcpy(&ctrl->imm, ah->av.eth.mac + 2, 4);
2233 memcpy(&in6, sgid.raw, sizeof(in6));
2234
2235 if (!mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2236 u64 mac = atomic64_read(&to_mdev(ib_dev)->iboe.mac[sqp->qp.port - 1]);
2237 u8 smac[ETH_ALEN];
2238
2239 mlx4_u64_to_smac(smac, mac);
2240 memcpy(sqp->ud_header.eth.smac_h, smac, ETH_ALEN);
2241 } else {
2242 /* use the src mac of the tunnel */
2243 memcpy(sqp->ud_header.eth.smac_h, ah->av.eth.s_mac, ETH_ALEN);
2244 }
2245
2246 if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6))
2247 mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
2248 if (!is_vlan) {
2249 sqp->ud_header.eth.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
2250 } else {
2251 sqp->ud_header.vlan.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
2252 sqp->ud_header.vlan.tag = cpu_to_be16(vlan | pcp);
2253 }
2254 } else {
2255 sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0;
2256 if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
2257 sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
2258 }
2259 sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
2260 if (!sqp->qp.ibqp.qp_num)
2261 ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey);
2262 else
2263 ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey);
2264 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
2265 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2266 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
2267 sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
2268 sqp->qkey : wr->wr.ud.remote_qkey);
2269 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
2270
2271 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
2272
2273 if (0) {
2274 pr_err("built UD header of size %d:\n", header_size);
2275 for (i = 0; i < header_size / 4; ++i) {
2276 if (i % 8 == 0)
2277 pr_err(" [%02x] ", i * 4);
2278 pr_cont(" %08x",
2279 be32_to_cpu(((__be32 *) sqp->header_buf)[i]));
2280 if ((i + 1) % 8 == 0)
2281 pr_cont("\n");
2282 }
2283 pr_err("\n");
2284 }
2285
2286 /*
2287 * Inline data segments may not cross a 64 byte boundary. If
2288 * our UD header is bigger than the space available up to the
2289 * next 64 byte boundary in the WQE, use two inline data
2290 * segments to hold the UD header.
2291 */
2292 spc = MLX4_INLINE_ALIGN -
2293 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2294 if (header_size <= spc) {
2295 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
2296 memcpy(inl + 1, sqp->header_buf, header_size);
2297 i = 1;
2298 } else {
2299 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2300 memcpy(inl + 1, sqp->header_buf, spc);
2301
2302 inl = (void *) (inl + 1) + spc;
2303 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
2304 /*
2305 * Need a barrier here to make sure all the data is
2306 * visible before the byte_count field is set.
2307 * Otherwise the HCA prefetcher could grab the 64-byte
2308 * chunk with this inline segment and get a valid (!=
2309 * 0xffffffff) byte count but stale data, and end up
2310 * generating a packet with bad headers.
2311 *
2312 * The first inline segment's byte_count field doesn't
2313 * need a barrier, because it comes after a
2314 * control/MLX segment and therefore is at an offset
2315 * of 16 mod 64.
2316 */
2317 wmb();
2318 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
2319 i = 2;
2320 }
2321
2322 *mlx_seg_len =
2323 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
2324 return 0;
2325 }
2326
2327 static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
2328 {
2329 unsigned cur;
2330 struct mlx4_ib_cq *cq;
2331
2332 cur = wq->head - wq->tail;
2333 if (likely(cur + nreq < wq->max_post))
2334 return 0;
2335
2336 cq = to_mcq(ib_cq);
2337 spin_lock(&cq->lock);
2338 cur = wq->head - wq->tail;
2339 spin_unlock(&cq->lock);
2340
2341 return cur + nreq >= wq->max_post;
2342 }
2343
2344 static __be32 convert_access(int acc)
2345 {
2346 return (acc & IB_ACCESS_REMOTE_ATOMIC ?
2347 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC) : 0) |
2348 (acc & IB_ACCESS_REMOTE_WRITE ?
2349 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE) : 0) |
2350 (acc & IB_ACCESS_REMOTE_READ ?
2351 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ) : 0) |
2352 (acc & IB_ACCESS_LOCAL_WRITE ? cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_WRITE) : 0) |
2353 cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_READ);
2354 }
2355
2356 static void set_fmr_seg(struct mlx4_wqe_fmr_seg *fseg, struct ib_send_wr *wr)
2357 {
2358 struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(wr->wr.fast_reg.page_list);
2359 int i;
2360
2361 for (i = 0; i < wr->wr.fast_reg.page_list_len; ++i)
2362 mfrpl->mapped_page_list[i] =
2363 cpu_to_be64(wr->wr.fast_reg.page_list->page_list[i] |
2364 MLX4_MTT_FLAG_PRESENT);
2365
2366 fseg->flags = convert_access(wr->wr.fast_reg.access_flags);
2367 fseg->mem_key = cpu_to_be32(wr->wr.fast_reg.rkey);
2368 fseg->buf_list = cpu_to_be64(mfrpl->map);
2369 fseg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start);
2370 fseg->reg_len = cpu_to_be64(wr->wr.fast_reg.length);
2371 fseg->offset = 0; /* XXX -- is this just for ZBVA? */
2372 fseg->page_size = cpu_to_be32(wr->wr.fast_reg.page_shift);
2373 fseg->reserved[0] = 0;
2374 fseg->reserved[1] = 0;
2375 }
2376
2377 static void set_bind_seg(struct mlx4_wqe_bind_seg *bseg, struct ib_send_wr *wr)
2378 {
2379 bseg->flags1 =
2380 convert_access(wr->wr.bind_mw.bind_info.mw_access_flags) &
2381 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ |
2382 MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE |
2383 MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC);
2384 bseg->flags2 = 0;
2385 if (wr->wr.bind_mw.mw->type == IB_MW_TYPE_2)
2386 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_TYPE_2);
2387 if (wr->wr.bind_mw.bind_info.mw_access_flags & IB_ZERO_BASED)
2388 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_ZERO_BASED);
2389 bseg->new_rkey = cpu_to_be32(wr->wr.bind_mw.rkey);
2390 bseg->lkey = cpu_to_be32(wr->wr.bind_mw.bind_info.mr->lkey);
2391 bseg->addr = cpu_to_be64(wr->wr.bind_mw.bind_info.addr);
2392 bseg->length = cpu_to_be64(wr->wr.bind_mw.bind_info.length);
2393 }
2394
2395 static void set_local_inv_seg(struct mlx4_wqe_local_inval_seg *iseg, u32 rkey)
2396 {
2397 memset(iseg, 0, sizeof(*iseg));
2398 iseg->mem_key = cpu_to_be32(rkey);
2399 }
2400
2401 static __always_inline void set_raddr_seg(struct mlx4_wqe_raddr_seg *rseg,
2402 u64 remote_addr, u32 rkey)
2403 {
2404 rseg->raddr = cpu_to_be64(remote_addr);
2405 rseg->rkey = cpu_to_be32(rkey);
2406 rseg->reserved = 0;
2407 }
2408
2409 static void set_atomic_seg(struct mlx4_wqe_atomic_seg *aseg, struct ib_send_wr *wr)
2410 {
2411 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
2412 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
2413 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
2414 } else if (wr->opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) {
2415 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2416 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2417 } else {
2418 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2419 aseg->compare = 0;
2420 }
2421
2422 }
2423
2424 static void set_masked_atomic_seg(struct mlx4_wqe_masked_atomic_seg *aseg,
2425 struct ib_send_wr *wr)
2426 {
2427 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
2428 aseg->swap_add_mask = cpu_to_be64(wr->wr.atomic.swap_mask);
2429 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
2430 aseg->compare_mask = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2431 }
2432
2433 static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg,
2434 struct ib_send_wr *wr)
2435 {
2436 memcpy(dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av));
2437 dseg->dqpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2438 dseg->qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2439 dseg->vlan = to_mah(wr->wr.ud.ah)->av.eth.vlan;
2440 memcpy(dseg->mac, to_mah(wr->wr.ud.ah)->av.eth.mac, 6);
2441 }
2442
2443 static void set_tunnel_datagram_seg(struct mlx4_ib_dev *dev,
2444 struct mlx4_wqe_datagram_seg *dseg,
2445 struct ib_send_wr *wr,
2446 enum mlx4_ib_qp_type qpt)
2447 {
2448 union mlx4_ext_av *av = &to_mah(wr->wr.ud.ah)->av;
2449 struct mlx4_av sqp_av = {0};
2450 int port = *((u8 *) &av->ib.port_pd) & 0x3;
2451
2452 /* force loopback */
2453 sqp_av.port_pd = av->ib.port_pd | cpu_to_be32(0x80000000);
2454 sqp_av.g_slid = av->ib.g_slid & 0x7f; /* no GRH */
2455 sqp_av.sl_tclass_flowlabel = av->ib.sl_tclass_flowlabel &
2456 cpu_to_be32(0xf0000000);
2457
2458 memcpy(dseg->av, &sqp_av, sizeof (struct mlx4_av));
2459 if (qpt == MLX4_IB_QPT_PROXY_GSI)
2460 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp1_tunnel[port - 1]);
2461 else
2462 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp0_tunnel[port - 1]);
2463 /* Use QKEY from the QP context, which is set by master */
2464 dseg->qkey = cpu_to_be32(IB_QP_SET_QKEY);
2465 }
2466
2467 static void build_tunnel_header(struct ib_send_wr *wr, void *wqe, unsigned *mlx_seg_len)
2468 {
2469 struct mlx4_wqe_inline_seg *inl = wqe;
2470 struct mlx4_ib_tunnel_header hdr;
2471 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2472 int spc;
2473 int i;
2474
2475 memcpy(&hdr.av, &ah->av, sizeof hdr.av);
2476 hdr.remote_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2477 hdr.pkey_index = cpu_to_be16(wr->wr.ud.pkey_index);
2478 hdr.qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2479 memcpy(hdr.mac, ah->av.eth.mac, 6);
2480 hdr.vlan = ah->av.eth.vlan;
2481
2482 spc = MLX4_INLINE_ALIGN -
2483 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2484 if (sizeof (hdr) <= spc) {
2485 memcpy(inl + 1, &hdr, sizeof (hdr));
2486 wmb();
2487 inl->byte_count = cpu_to_be32(1 << 31 | sizeof (hdr));
2488 i = 1;
2489 } else {
2490 memcpy(inl + 1, &hdr, spc);
2491 wmb();
2492 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2493
2494 inl = (void *) (inl + 1) + spc;
2495 memcpy(inl + 1, (void *) &hdr + spc, sizeof (hdr) - spc);
2496 wmb();
2497 inl->byte_count = cpu_to_be32(1 << 31 | (sizeof (hdr) - spc));
2498 i = 2;
2499 }
2500
2501 *mlx_seg_len =
2502 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + sizeof (hdr), 16);
2503 }
2504
2505 static void set_mlx_icrc_seg(void *dseg)
2506 {
2507 u32 *t = dseg;
2508 struct mlx4_wqe_inline_seg *iseg = dseg;
2509
2510 t[1] = 0;
2511
2512 /*
2513 * Need a barrier here before writing the byte_count field to
2514 * make sure that all the data is visible before the
2515 * byte_count field is set. Otherwise, if the segment begins
2516 * a new cacheline, the HCA prefetcher could grab the 64-byte
2517 * chunk and get a valid (!= * 0xffffffff) byte count but
2518 * stale data, and end up sending the wrong data.
2519 */
2520 wmb();
2521
2522 iseg->byte_count = cpu_to_be32((1 << 31) | 4);
2523 }
2524
2525 static void set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2526 {
2527 dseg->lkey = cpu_to_be32(sg->lkey);
2528 dseg->addr = cpu_to_be64(sg->addr);
2529
2530 /*
2531 * Need a barrier here before writing the byte_count field to
2532 * make sure that all the data is visible before the
2533 * byte_count field is set. Otherwise, if the segment begins
2534 * a new cacheline, the HCA prefetcher could grab the 64-byte
2535 * chunk and get a valid (!= * 0xffffffff) byte count but
2536 * stale data, and end up sending the wrong data.
2537 */
2538 wmb();
2539
2540 dseg->byte_count = cpu_to_be32(sg->length);
2541 }
2542
2543 static void __set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2544 {
2545 dseg->byte_count = cpu_to_be32(sg->length);
2546 dseg->lkey = cpu_to_be32(sg->lkey);
2547 dseg->addr = cpu_to_be64(sg->addr);
2548 }
2549
2550 static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe, struct ib_send_wr *wr,
2551 struct mlx4_ib_qp *qp, unsigned *lso_seg_len,
2552 __be32 *lso_hdr_sz, __be32 *blh)
2553 {
2554 unsigned halign = ALIGN(sizeof *wqe + wr->wr.ud.hlen, 16);
2555
2556 if (unlikely(halign > MLX4_IB_CACHE_LINE_SIZE))
2557 *blh = cpu_to_be32(1 << 6);
2558
2559 if (unlikely(!(qp->flags & MLX4_IB_QP_LSO) &&
2560 wr->num_sge > qp->sq.max_gs - (halign >> 4)))
2561 return -EINVAL;
2562
2563 memcpy(wqe->header, wr->wr.ud.header, wr->wr.ud.hlen);
2564
2565 *lso_hdr_sz = cpu_to_be32((wr->wr.ud.mss - wr->wr.ud.hlen) << 16 |
2566 wr->wr.ud.hlen);
2567 *lso_seg_len = halign;
2568 return 0;
2569 }
2570
2571 static __be32 send_ieth(struct ib_send_wr *wr)
2572 {
2573 switch (wr->opcode) {
2574 case IB_WR_SEND_WITH_IMM:
2575 case IB_WR_RDMA_WRITE_WITH_IMM:
2576 return wr->ex.imm_data;
2577
2578 case IB_WR_SEND_WITH_INV:
2579 return cpu_to_be32(wr->ex.invalidate_rkey);
2580
2581 default:
2582 return 0;
2583 }
2584 }
2585
2586 static void add_zero_len_inline(void *wqe)
2587 {
2588 struct mlx4_wqe_inline_seg *inl = wqe;
2589 memset(wqe, 0, 16);
2590 inl->byte_count = cpu_to_be32(1 << 31);
2591 }
2592
2593 int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
2594 struct ib_send_wr **bad_wr)
2595 {
2596 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2597 void *wqe;
2598 struct mlx4_wqe_ctrl_seg *ctrl;
2599 struct mlx4_wqe_data_seg *dseg;
2600 unsigned long flags;
2601 int nreq;
2602 int err = 0;
2603 unsigned ind;
2604 int uninitialized_var(stamp);
2605 int uninitialized_var(size);
2606 unsigned uninitialized_var(seglen);
2607 __be32 dummy;
2608 __be32 *lso_wqe;
2609 __be32 uninitialized_var(lso_hdr_sz);
2610 __be32 blh;
2611 int i;
2612
2613 spin_lock_irqsave(&qp->sq.lock, flags);
2614
2615 ind = qp->sq_next_wqe;
2616
2617 for (nreq = 0; wr; ++nreq, wr = wr->next) {
2618 lso_wqe = &dummy;
2619 blh = 0;
2620
2621 if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
2622 err = -ENOMEM;
2623 *bad_wr = wr;
2624 goto out;
2625 }
2626
2627 if (unlikely(wr->num_sge > qp->sq.max_gs)) {
2628 err = -EINVAL;
2629 *bad_wr = wr;
2630 goto out;
2631 }
2632
2633 ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
2634 qp->sq.wrid[(qp->sq.head + nreq) & (qp->sq.wqe_cnt - 1)] = wr->wr_id;
2635
2636 ctrl->srcrb_flags =
2637 (wr->send_flags & IB_SEND_SIGNALED ?
2638 cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) |
2639 (wr->send_flags & IB_SEND_SOLICITED ?
2640 cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) |
2641 ((wr->send_flags & IB_SEND_IP_CSUM) ?
2642 cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
2643 MLX4_WQE_CTRL_TCP_UDP_CSUM) : 0) |
2644 qp->sq_signal_bits;
2645
2646 ctrl->imm = send_ieth(wr);
2647
2648 wqe += sizeof *ctrl;
2649 size = sizeof *ctrl / 16;
2650
2651 switch (qp->mlx4_ib_qp_type) {
2652 case MLX4_IB_QPT_RC:
2653 case MLX4_IB_QPT_UC:
2654 switch (wr->opcode) {
2655 case IB_WR_ATOMIC_CMP_AND_SWP:
2656 case IB_WR_ATOMIC_FETCH_AND_ADD:
2657 case IB_WR_MASKED_ATOMIC_FETCH_AND_ADD:
2658 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2659 wr->wr.atomic.rkey);
2660 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2661
2662 set_atomic_seg(wqe, wr);
2663 wqe += sizeof (struct mlx4_wqe_atomic_seg);
2664
2665 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2666 sizeof (struct mlx4_wqe_atomic_seg)) / 16;
2667
2668 break;
2669
2670 case IB_WR_MASKED_ATOMIC_CMP_AND_SWP:
2671 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2672 wr->wr.atomic.rkey);
2673 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2674
2675 set_masked_atomic_seg(wqe, wr);
2676 wqe += sizeof (struct mlx4_wqe_masked_atomic_seg);
2677
2678 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2679 sizeof (struct mlx4_wqe_masked_atomic_seg)) / 16;
2680
2681 break;
2682
2683 case IB_WR_RDMA_READ:
2684 case IB_WR_RDMA_WRITE:
2685 case IB_WR_RDMA_WRITE_WITH_IMM:
2686 set_raddr_seg(wqe, wr->wr.rdma.remote_addr,
2687 wr->wr.rdma.rkey);
2688 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2689 size += sizeof (struct mlx4_wqe_raddr_seg) / 16;
2690 break;
2691
2692 case IB_WR_LOCAL_INV:
2693 ctrl->srcrb_flags |=
2694 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2695 set_local_inv_seg(wqe, wr->ex.invalidate_rkey);
2696 wqe += sizeof (struct mlx4_wqe_local_inval_seg);
2697 size += sizeof (struct mlx4_wqe_local_inval_seg) / 16;
2698 break;
2699
2700 case IB_WR_FAST_REG_MR:
2701 ctrl->srcrb_flags |=
2702 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2703 set_fmr_seg(wqe, wr);
2704 wqe += sizeof (struct mlx4_wqe_fmr_seg);
2705 size += sizeof (struct mlx4_wqe_fmr_seg) / 16;
2706 break;
2707
2708 case IB_WR_BIND_MW:
2709 ctrl->srcrb_flags |=
2710 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2711 set_bind_seg(wqe, wr);
2712 wqe += sizeof(struct mlx4_wqe_bind_seg);
2713 size += sizeof(struct mlx4_wqe_bind_seg) / 16;
2714 break;
2715 default:
2716 /* No extra segments required for sends */
2717 break;
2718 }
2719 break;
2720
2721 case MLX4_IB_QPT_TUN_SMI_OWNER:
2722 err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2723 if (unlikely(err)) {
2724 *bad_wr = wr;
2725 goto out;
2726 }
2727 wqe += seglen;
2728 size += seglen / 16;
2729 break;
2730 case MLX4_IB_QPT_TUN_SMI:
2731 case MLX4_IB_QPT_TUN_GSI:
2732 /* this is a UD qp used in MAD responses to slaves. */
2733 set_datagram_seg(wqe, wr);
2734 /* set the forced-loopback bit in the data seg av */
2735 *(__be32 *) wqe |= cpu_to_be32(0x80000000);
2736 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2737 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2738 break;
2739 case MLX4_IB_QPT_UD:
2740 set_datagram_seg(wqe, wr);
2741 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2742 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2743
2744 if (wr->opcode == IB_WR_LSO) {
2745 err = build_lso_seg(wqe, wr, qp, &seglen, &lso_hdr_sz, &blh);
2746 if (unlikely(err)) {
2747 *bad_wr = wr;
2748 goto out;
2749 }
2750 lso_wqe = (__be32 *) wqe;
2751 wqe += seglen;
2752 size += seglen / 16;
2753 }
2754 break;
2755
2756 case MLX4_IB_QPT_PROXY_SMI_OWNER:
2757 err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2758 if (unlikely(err)) {
2759 *bad_wr = wr;
2760 goto out;
2761 }
2762 wqe += seglen;
2763 size += seglen / 16;
2764 /* to start tunnel header on a cache-line boundary */
2765 add_zero_len_inline(wqe);
2766 wqe += 16;
2767 size++;
2768 build_tunnel_header(wr, wqe, &seglen);
2769 wqe += seglen;
2770 size += seglen / 16;
2771 break;
2772 case MLX4_IB_QPT_PROXY_SMI:
2773 case MLX4_IB_QPT_PROXY_GSI:
2774 /* If we are tunneling special qps, this is a UD qp.
2775 * In this case we first add a UD segment targeting
2776 * the tunnel qp, and then add a header with address
2777 * information */
2778 set_tunnel_datagram_seg(to_mdev(ibqp->device), wqe, wr,
2779 qp->mlx4_ib_qp_type);
2780 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2781 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2782 build_tunnel_header(wr, wqe, &seglen);
2783 wqe += seglen;
2784 size += seglen / 16;
2785 break;
2786
2787 case MLX4_IB_QPT_SMI:
2788 case MLX4_IB_QPT_GSI:
2789 err = build_mlx_header(to_msqp(qp), wr, ctrl, &seglen);
2790 if (unlikely(err)) {
2791 *bad_wr = wr;
2792 goto out;
2793 }
2794 wqe += seglen;
2795 size += seglen / 16;
2796 break;
2797
2798 default:
2799 break;
2800 }
2801
2802 /*
2803 * Write data segments in reverse order, so as to
2804 * overwrite cacheline stamp last within each
2805 * cacheline. This avoids issues with WQE
2806 * prefetching.
2807 */
2808
2809 dseg = wqe;
2810 dseg += wr->num_sge - 1;
2811 size += wr->num_sge * (sizeof (struct mlx4_wqe_data_seg) / 16);
2812
2813 /* Add one more inline data segment for ICRC for MLX sends */
2814 if (unlikely(qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
2815 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI ||
2816 qp->mlx4_ib_qp_type &
2817 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))) {
2818 set_mlx_icrc_seg(dseg + 1);
2819 size += sizeof (struct mlx4_wqe_data_seg) / 16;
2820 }
2821
2822 for (i = wr->num_sge - 1; i >= 0; --i, --dseg)
2823 set_data_seg(dseg, wr->sg_list + i);
2824
2825 /*
2826 * Possibly overwrite stamping in cacheline with LSO
2827 * segment only after making sure all data segments
2828 * are written.
2829 */
2830 wmb();
2831 *lso_wqe = lso_hdr_sz;
2832
2833 ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ?
2834 MLX4_WQE_CTRL_FENCE : 0) | size;
2835
2836 /*
2837 * Make sure descriptor is fully written before
2838 * setting ownership bit (because HW can start
2839 * executing as soon as we do).
2840 */
2841 wmb();
2842
2843 if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) {
2844 *bad_wr = wr;
2845 err = -EINVAL;
2846 goto out;
2847 }
2848
2849 ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] |
2850 (ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0) | blh;
2851
2852 stamp = ind + qp->sq_spare_wqes;
2853 ind += DIV_ROUND_UP(size * 16, 1U << qp->sq.wqe_shift);
2854
2855 /*
2856 * We can improve latency by not stamping the last
2857 * send queue WQE until after ringing the doorbell, so
2858 * only stamp here if there are still more WQEs to post.
2859 *
2860 * Same optimization applies to padding with NOP wqe
2861 * in case of WQE shrinking (used to prevent wrap-around
2862 * in the middle of WR).
2863 */
2864 if (wr->next) {
2865 stamp_send_wqe(qp, stamp, size * 16);
2866 ind = pad_wraparound(qp, ind);
2867 }
2868 }
2869
2870 out:
2871 if (likely(nreq)) {
2872 qp->sq.head += nreq;
2873
2874 /*
2875 * Make sure that descriptors are written before
2876 * doorbell record.
2877 */
2878 wmb();
2879
2880 writel(qp->doorbell_qpn,
2881 to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL);
2882
2883 /*
2884 * Make sure doorbells don't leak out of SQ spinlock
2885 * and reach the HCA out of order.
2886 */
2887 mmiowb();
2888
2889 stamp_send_wqe(qp, stamp, size * 16);
2890
2891 ind = pad_wraparound(qp, ind);
2892 qp->sq_next_wqe = ind;
2893 }
2894
2895 spin_unlock_irqrestore(&qp->sq.lock, flags);
2896
2897 return err;
2898 }
2899
2900 int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
2901 struct ib_recv_wr **bad_wr)
2902 {
2903 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2904 struct mlx4_wqe_data_seg *scat;
2905 unsigned long flags;
2906 int err = 0;
2907 int nreq;
2908 int ind;
2909 int max_gs;
2910 int i;
2911
2912 max_gs = qp->rq.max_gs;
2913 spin_lock_irqsave(&qp->rq.lock, flags);
2914
2915 ind = qp->rq.head & (qp->rq.wqe_cnt - 1);
2916
2917 for (nreq = 0; wr; ++nreq, wr = wr->next) {
2918 if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
2919 err = -ENOMEM;
2920 *bad_wr = wr;
2921 goto out;
2922 }
2923
2924 if (unlikely(wr->num_sge > qp->rq.max_gs)) {
2925 err = -EINVAL;
2926 *bad_wr = wr;
2927 goto out;
2928 }
2929
2930 scat = get_recv_wqe(qp, ind);
2931
2932 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
2933 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
2934 ib_dma_sync_single_for_device(ibqp->device,
2935 qp->sqp_proxy_rcv[ind].map,
2936 sizeof (struct mlx4_ib_proxy_sqp_hdr),
2937 DMA_FROM_DEVICE);
2938 scat->byte_count =
2939 cpu_to_be32(sizeof (struct mlx4_ib_proxy_sqp_hdr));
2940 /* use dma lkey from upper layer entry */
2941 scat->lkey = cpu_to_be32(wr->sg_list->lkey);
2942 scat->addr = cpu_to_be64(qp->sqp_proxy_rcv[ind].map);
2943 scat++;
2944 max_gs--;
2945 }
2946
2947 for (i = 0; i < wr->num_sge; ++i)
2948 __set_data_seg(scat + i, wr->sg_list + i);
2949
2950 if (i < max_gs) {
2951 scat[i].byte_count = 0;
2952 scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY);
2953 scat[i].addr = 0;
2954 }
2955
2956 qp->rq.wrid[ind] = wr->wr_id;
2957
2958 ind = (ind + 1) & (qp->rq.wqe_cnt - 1);
2959 }
2960
2961 out:
2962 if (likely(nreq)) {
2963 qp->rq.head += nreq;
2964
2965 /*
2966 * Make sure that descriptors are written before
2967 * doorbell record.
2968 */
2969 wmb();
2970
2971 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
2972 }
2973
2974 spin_unlock_irqrestore(&qp->rq.lock, flags);
2975
2976 return err;
2977 }
2978
2979 static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state)
2980 {
2981 switch (mlx4_state) {
2982 case MLX4_QP_STATE_RST: return IB_QPS_RESET;
2983 case MLX4_QP_STATE_INIT: return IB_QPS_INIT;
2984 case MLX4_QP_STATE_RTR: return IB_QPS_RTR;
2985 case MLX4_QP_STATE_RTS: return IB_QPS_RTS;
2986 case MLX4_QP_STATE_SQ_DRAINING:
2987 case MLX4_QP_STATE_SQD: return IB_QPS_SQD;
2988 case MLX4_QP_STATE_SQER: return IB_QPS_SQE;
2989 case MLX4_QP_STATE_ERR: return IB_QPS_ERR;
2990 default: return -1;
2991 }
2992 }
2993
2994 static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state)
2995 {
2996 switch (mlx4_mig_state) {
2997 case MLX4_QP_PM_ARMED: return IB_MIG_ARMED;
2998 case MLX4_QP_PM_REARM: return IB_MIG_REARM;
2999 case MLX4_QP_PM_MIGRATED: return IB_MIG_MIGRATED;
3000 default: return -1;
3001 }
3002 }
3003
3004 static int to_ib_qp_access_flags(int mlx4_flags)
3005 {
3006 int ib_flags = 0;
3007
3008 if (mlx4_flags & MLX4_QP_BIT_RRE)
3009 ib_flags |= IB_ACCESS_REMOTE_READ;
3010 if (mlx4_flags & MLX4_QP_BIT_RWE)
3011 ib_flags |= IB_ACCESS_REMOTE_WRITE;
3012 if (mlx4_flags & MLX4_QP_BIT_RAE)
3013 ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
3014
3015 return ib_flags;
3016 }
3017
3018 static void to_ib_ah_attr(struct mlx4_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr,
3019 struct mlx4_qp_path *path)
3020 {
3021 struct mlx4_dev *dev = ibdev->dev;
3022 int is_eth;
3023
3024 memset(ib_ah_attr, 0, sizeof *ib_ah_attr);
3025 ib_ah_attr->port_num = path->sched_queue & 0x40 ? 2 : 1;
3026
3027 if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports)
3028 return;
3029
3030 is_eth = rdma_port_get_link_layer(&ibdev->ib_dev, ib_ah_attr->port_num) ==
3031 IB_LINK_LAYER_ETHERNET;
3032 if (is_eth)
3033 ib_ah_attr->sl = ((path->sched_queue >> 3) & 0x7) |
3034 ((path->sched_queue & 4) << 1);
3035 else
3036 ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf;
3037
3038 ib_ah_attr->dlid = be16_to_cpu(path->rlid);
3039 ib_ah_attr->src_path_bits = path->grh_mylmc & 0x7f;
3040 ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0;
3041 ib_ah_attr->ah_flags = (path->grh_mylmc & (1 << 7)) ? IB_AH_GRH : 0;
3042 if (ib_ah_attr->ah_flags) {
3043 ib_ah_attr->grh.sgid_index = path->mgid_index;
3044 ib_ah_attr->grh.hop_limit = path->hop_limit;
3045 ib_ah_attr->grh.traffic_class =
3046 (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff;
3047 ib_ah_attr->grh.flow_label =
3048 be32_to_cpu(path->tclass_flowlabel) & 0xfffff;
3049 memcpy(ib_ah_attr->grh.dgid.raw,
3050 path->rgid, sizeof ib_ah_attr->grh.dgid.raw);
3051 }
3052 }
3053
3054 int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
3055 struct ib_qp_init_attr *qp_init_attr)
3056 {
3057 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
3058 struct mlx4_ib_qp *qp = to_mqp(ibqp);
3059 struct mlx4_qp_context context;
3060 int mlx4_state;
3061 int err = 0;
3062
3063 mutex_lock(&qp->mutex);
3064
3065 if (qp->state == IB_QPS_RESET) {
3066 qp_attr->qp_state = IB_QPS_RESET;
3067 goto done;
3068 }
3069
3070 err = mlx4_qp_query(dev->dev, &qp->mqp, &context);
3071 if (err) {
3072 err = -EINVAL;
3073 goto out;
3074 }
3075
3076 mlx4_state = be32_to_cpu(context.flags) >> 28;
3077
3078 qp->state = to_ib_qp_state(mlx4_state);
3079 qp_attr->qp_state = qp->state;
3080 qp_attr->path_mtu = context.mtu_msgmax >> 5;
3081 qp_attr->path_mig_state =
3082 to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3);
3083 qp_attr->qkey = be32_to_cpu(context.qkey);
3084 qp_attr->rq_psn = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff;
3085 qp_attr->sq_psn = be32_to_cpu(context.next_send_psn) & 0xffffff;
3086 qp_attr->dest_qp_num = be32_to_cpu(context.remote_qpn) & 0xffffff;
3087 qp_attr->qp_access_flags =
3088 to_ib_qp_access_flags(be32_to_cpu(context.params2));
3089
3090 if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) {
3091 to_ib_ah_attr(dev, &qp_attr->ah_attr, &context.pri_path);
3092 to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context.alt_path);
3093 qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f;
3094 qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num;
3095 }
3096
3097 qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f;
3098 if (qp_attr->qp_state == IB_QPS_INIT)
3099 qp_attr->port_num = qp->port;
3100 else
3101 qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1;
3102
3103 /* qp_attr->en_sqd_async_notify is only applicable in modify qp */
3104 qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING;
3105
3106 qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7);
3107
3108 qp_attr->max_dest_rd_atomic =
3109 1 << ((be32_to_cpu(context.params2) >> 21) & 0x7);
3110 qp_attr->min_rnr_timer =
3111 (be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f;
3112 qp_attr->timeout = context.pri_path.ackto >> 3;
3113 qp_attr->retry_cnt = (be32_to_cpu(context.params1) >> 16) & 0x7;
3114 qp_attr->rnr_retry = (be32_to_cpu(context.params1) >> 13) & 0x7;
3115 qp_attr->alt_timeout = context.alt_path.ackto >> 3;
3116
3117 done:
3118 qp_attr->cur_qp_state = qp_attr->qp_state;
3119 qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt;
3120 qp_attr->cap.max_recv_sge = qp->rq.max_gs;
3121
3122 if (!ibqp->uobject) {
3123 qp_attr->cap.max_send_wr = qp->sq.wqe_cnt;
3124 qp_attr->cap.max_send_sge = qp->sq.max_gs;
3125 } else {
3126 qp_attr->cap.max_send_wr = 0;
3127 qp_attr->cap.max_send_sge = 0;
3128 }
3129
3130 /*
3131 * We don't support inline sends for kernel QPs (yet), and we
3132 * don't know what userspace's value should be.
3133 */
3134 qp_attr->cap.max_inline_data = 0;
3135
3136 qp_init_attr->cap = qp_attr->cap;
3137
3138 qp_init_attr->create_flags = 0;
3139 if (qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK)
3140 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
3141
3142 if (qp->flags & MLX4_IB_QP_LSO)
3143 qp_init_attr->create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
3144
3145 if (qp->flags & MLX4_IB_QP_NETIF)
3146 qp_init_attr->create_flags |= IB_QP_CREATE_NETIF_QP;
3147
3148 qp_init_attr->sq_sig_type =
3149 qp->sq_signal_bits == cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) ?
3150 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
3151
3152 out:
3153 mutex_unlock(&qp->mutex);
3154 return err;
3155 }
3156
Linux with added FPC-III support