?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
irqchip/s3c24xx: Mark init_eint as __maybe_unused
[linux/fpc-iii.git] / drivers / infiniband / hw / mlx4 / qp.c
blob13eaaf45288f80d4bb6658d5a18985a978e8c98d
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 #include <linux/vmalloc.h>
38
39 #include <rdma/ib_cache.h>
40 #include <rdma/ib_pack.h>
41 #include <rdma/ib_addr.h>
42 #include <rdma/ib_mad.h>
43
44 #include <linux/mlx4/driver.h>
45 #include <linux/mlx4/qp.h>
46
47 #include "mlx4_ib.h"
48 #include "user.h"
49
50 static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq,
51 struct mlx4_ib_cq *recv_cq);
52 static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq,
53 struct mlx4_ib_cq *recv_cq);
54
55 enum {
56 MLX4_IB_ACK_REQ_FREQ = 8,
57 };
58
59 enum {
60 MLX4_IB_DEFAULT_SCHED_QUEUE = 0x83,
61 MLX4_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f,
62 MLX4_IB_LINK_TYPE_IB = 0,
63 MLX4_IB_LINK_TYPE_ETH = 1
64 };
65
66 enum {
67 /*
68 * Largest possible UD header: send with GRH and immediate
69 * data plus 18 bytes for an Ethernet header with VLAN/802.1Q
70 * tag. (LRH would only use 8 bytes, so Ethernet is the
71 * biggest case)
72 */
73 MLX4_IB_UD_HEADER_SIZE = 82,
74 MLX4_IB_LSO_HEADER_SPARE = 128,
75 };
76
77 enum {
78 MLX4_IB_IBOE_ETHERTYPE = 0x8915
79 };
80
81 struct mlx4_ib_sqp {
82 struct mlx4_ib_qp qp;
83 int pkey_index;
84 u32 qkey;
85 u32 send_psn;
86 struct ib_ud_header ud_header;
87 u8 header_buf[MLX4_IB_UD_HEADER_SIZE];
88 };
89
90 enum {
91 MLX4_IB_MIN_SQ_STRIDE = 6,
92 MLX4_IB_CACHE_LINE_SIZE = 64,
93 };
94
95 enum {
96 MLX4_RAW_QP_MTU = 7,
97 MLX4_RAW_QP_MSGMAX = 31,
98 };
99
100 #ifndef ETH_ALEN
101 #define ETH_ALEN 6
102 #endif
103
104 static const __be32 mlx4_ib_opcode[] = {
105 [IB_WR_SEND] = cpu_to_be32(MLX4_OPCODE_SEND),
106 [IB_WR_LSO] = cpu_to_be32(MLX4_OPCODE_LSO),
107 [IB_WR_SEND_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_SEND_IMM),
108 [IB_WR_RDMA_WRITE] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE),
109 [IB_WR_RDMA_WRITE_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE_IMM),
110 [IB_WR_RDMA_READ] = cpu_to_be32(MLX4_OPCODE_RDMA_READ),
111 [IB_WR_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_ATOMIC_CS),
112 [IB_WR_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_ATOMIC_FA),
113 [IB_WR_SEND_WITH_INV] = cpu_to_be32(MLX4_OPCODE_SEND_INVAL),
114 [IB_WR_LOCAL_INV] = cpu_to_be32(MLX4_OPCODE_LOCAL_INVAL),
115 [IB_WR_REG_MR] = cpu_to_be32(MLX4_OPCODE_FMR),
116 [IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_CS),
117 [IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_FA),
118 [IB_WR_BIND_MW] = cpu_to_be32(MLX4_OPCODE_BIND_MW),
119 };
120
121 static struct mlx4_ib_sqp *to_msqp(struct mlx4_ib_qp *mqp)
122 {
123 return container_of(mqp, struct mlx4_ib_sqp, qp);
124 }
125
126 static int is_tunnel_qp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
127 {
128 if (!mlx4_is_master(dev->dev))
129 return 0;
130
131 return qp->mqp.qpn >= dev->dev->phys_caps.base_tunnel_sqpn &&
132 qp->mqp.qpn < dev->dev->phys_caps.base_tunnel_sqpn +
133 8 * MLX4_MFUNC_MAX;
134 }
135
136 static int is_sqp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
137 {
138 int proxy_sqp = 0;
139 int real_sqp = 0;
140 int i;
141 /* PPF or Native -- real SQP */
142 real_sqp = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) &&
143 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn &&
144 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 3);
145 if (real_sqp)
146 return 1;
147 /* VF or PF -- proxy SQP */
148 if (mlx4_is_mfunc(dev->dev)) {
149 for (i = 0; i < dev->dev->caps.num_ports; i++) {
150 if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i] ||
151 qp->mqp.qpn == dev->dev->caps.qp1_proxy[i]) {
152 proxy_sqp = 1;
153 break;
154 }
155 }
156 }
157 return proxy_sqp;
158 }
159
160 /* used for INIT/CLOSE port logic */
161 static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
162 {
163 int proxy_qp0 = 0;
164 int real_qp0 = 0;
165 int i;
166 /* PPF or Native -- real QP0 */
167 real_qp0 = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) &&
168 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn &&
169 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 1);
170 if (real_qp0)
171 return 1;
172 /* VF or PF -- proxy QP0 */
173 if (mlx4_is_mfunc(dev->dev)) {
174 for (i = 0; i < dev->dev->caps.num_ports; i++) {
175 if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i]) {
176 proxy_qp0 = 1;
177 break;
178 }
179 }
180 }
181 return proxy_qp0;
182 }
183
184 static void *get_wqe(struct mlx4_ib_qp *qp, int offset)
185 {
186 return mlx4_buf_offset(&qp->buf, offset);
187 }
188
189 static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n)
190 {
191 return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift));
192 }
193
194 static void *get_send_wqe(struct mlx4_ib_qp *qp, int n)
195 {
196 return get_wqe(qp, qp->sq.offset + (n << qp->sq.wqe_shift));
197 }
198
199 /*
200 * Stamp a SQ WQE so that it is invalid if prefetched by marking the
201 * first four bytes of every 64 byte chunk with
202 * 0x7FFFFFF | (invalid_ownership_value << 31).
203 *
204 * When the max work request size is less than or equal to the WQE
205 * basic block size, as an optimization, we can stamp all WQEs with
206 * 0xffffffff, and skip the very first chunk of each WQE.
207 */
208 static void stamp_send_wqe(struct mlx4_ib_qp *qp, int n, int size)
209 {
210 __be32 *wqe;
211 int i;
212 int s;
213 int ind;
214 void *buf;
215 __be32 stamp;
216 struct mlx4_wqe_ctrl_seg *ctrl;
217
218 if (qp->sq_max_wqes_per_wr > 1) {
219 s = roundup(size, 1U << qp->sq.wqe_shift);
220 for (i = 0; i < s; i += 64) {
221 ind = (i >> qp->sq.wqe_shift) + n;
222 stamp = ind & qp->sq.wqe_cnt ? cpu_to_be32(0x7fffffff) :
223 cpu_to_be32(0xffffffff);
224 buf = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
225 wqe = buf + (i & ((1 << qp->sq.wqe_shift) - 1));
226 *wqe = stamp;
227 }
228 } else {
229 ctrl = buf = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
230 s = (ctrl->fence_size & 0x3f) << 4;
231 for (i = 64; i < s; i += 64) {
232 wqe = buf + i;
233 *wqe = cpu_to_be32(0xffffffff);
234 }
235 }
236 }
237
238 static void post_nop_wqe(struct mlx4_ib_qp *qp, int n, int size)
239 {
240 struct mlx4_wqe_ctrl_seg *ctrl;
241 struct mlx4_wqe_inline_seg *inl;
242 void *wqe;
243 int s;
244
245 ctrl = wqe = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
246 s = sizeof(struct mlx4_wqe_ctrl_seg);
247
248 if (qp->ibqp.qp_type == IB_QPT_UD) {
249 struct mlx4_wqe_datagram_seg *dgram = wqe + sizeof *ctrl;
250 struct mlx4_av *av = (struct mlx4_av *)dgram->av;
251 memset(dgram, 0, sizeof *dgram);
252 av->port_pd = cpu_to_be32((qp->port << 24) | to_mpd(qp->ibqp.pd)->pdn);
253 s += sizeof(struct mlx4_wqe_datagram_seg);
254 }
255
256 /* Pad the remainder of the WQE with an inline data segment. */
257 if (size > s) {
258 inl = wqe + s;
259 inl->byte_count = cpu_to_be32(1 << 31 | (size - s - sizeof *inl));
260 }
261 ctrl->srcrb_flags = 0;
262 ctrl->fence_size = size / 16;
263 /*
264 * Make sure descriptor is fully written before setting ownership bit
265 * (because HW can start executing as soon as we do).
266 */
267 wmb();
268
269 ctrl->owner_opcode = cpu_to_be32(MLX4_OPCODE_NOP | MLX4_WQE_CTRL_NEC) |
270 (n & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0);
271
272 stamp_send_wqe(qp, n + qp->sq_spare_wqes, size);
273 }
274
275 /* Post NOP WQE to prevent wrap-around in the middle of WR */
276 static inline unsigned pad_wraparound(struct mlx4_ib_qp *qp, int ind)
277 {
278 unsigned s = qp->sq.wqe_cnt - (ind & (qp->sq.wqe_cnt - 1));
279 if (unlikely(s < qp->sq_max_wqes_per_wr)) {
280 post_nop_wqe(qp, ind, s << qp->sq.wqe_shift);
281 ind += s;
282 }
283 return ind;
284 }
285
286 static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type)
287 {
288 struct ib_event event;
289 struct ib_qp *ibqp = &to_mibqp(qp)->ibqp;
290
291 if (type == MLX4_EVENT_TYPE_PATH_MIG)
292 to_mibqp(qp)->port = to_mibqp(qp)->alt_port;
293
294 if (ibqp->event_handler) {
295 event.device = ibqp->device;
296 event.element.qp = ibqp;
297 switch (type) {
298 case MLX4_EVENT_TYPE_PATH_MIG:
299 event.event = IB_EVENT_PATH_MIG;
300 break;
301 case MLX4_EVENT_TYPE_COMM_EST:
302 event.event = IB_EVENT_COMM_EST;
303 break;
304 case MLX4_EVENT_TYPE_SQ_DRAINED:
305 event.event = IB_EVENT_SQ_DRAINED;
306 break;
307 case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
308 event.event = IB_EVENT_QP_LAST_WQE_REACHED;
309 break;
310 case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
311 event.event = IB_EVENT_QP_FATAL;
312 break;
313 case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
314 event.event = IB_EVENT_PATH_MIG_ERR;
315 break;
316 case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
317 event.event = IB_EVENT_QP_REQ_ERR;
318 break;
319 case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
320 event.event = IB_EVENT_QP_ACCESS_ERR;
321 break;
322 default:
323 pr_warn("Unexpected event type %d "
324 "on QP %06x\n", type, qp->qpn);
325 return;
326 }
327
328 ibqp->event_handler(&event, ibqp->qp_context);
329 }
330 }
331
332 static int send_wqe_overhead(enum mlx4_ib_qp_type type, u32 flags)
333 {
334 /*
335 * UD WQEs must have a datagram segment.
336 * RC and UC WQEs might have a remote address segment.
337 * MLX WQEs need two extra inline data segments (for the UD
338 * header and space for the ICRC).
339 */
340 switch (type) {
341 case MLX4_IB_QPT_UD:
342 return sizeof (struct mlx4_wqe_ctrl_seg) +
343 sizeof (struct mlx4_wqe_datagram_seg) +
344 ((flags & MLX4_IB_QP_LSO) ? MLX4_IB_LSO_HEADER_SPARE : 0);
345 case MLX4_IB_QPT_PROXY_SMI_OWNER:
346 case MLX4_IB_QPT_PROXY_SMI:
347 case MLX4_IB_QPT_PROXY_GSI:
348 return sizeof (struct mlx4_wqe_ctrl_seg) +
349 sizeof (struct mlx4_wqe_datagram_seg) + 64;
350 case MLX4_IB_QPT_TUN_SMI_OWNER:
351 case MLX4_IB_QPT_TUN_GSI:
352 return sizeof (struct mlx4_wqe_ctrl_seg) +
353 sizeof (struct mlx4_wqe_datagram_seg);
354
355 case MLX4_IB_QPT_UC:
356 return sizeof (struct mlx4_wqe_ctrl_seg) +
357 sizeof (struct mlx4_wqe_raddr_seg);
358 case MLX4_IB_QPT_RC:
359 return sizeof (struct mlx4_wqe_ctrl_seg) +
360 sizeof (struct mlx4_wqe_atomic_seg) +
361 sizeof (struct mlx4_wqe_raddr_seg);
362 case MLX4_IB_QPT_SMI:
363 case MLX4_IB_QPT_GSI:
364 return sizeof (struct mlx4_wqe_ctrl_seg) +
365 ALIGN(MLX4_IB_UD_HEADER_SIZE +
366 DIV_ROUND_UP(MLX4_IB_UD_HEADER_SIZE,
367 MLX4_INLINE_ALIGN) *
368 sizeof (struct mlx4_wqe_inline_seg),
369 sizeof (struct mlx4_wqe_data_seg)) +
370 ALIGN(4 +
371 sizeof (struct mlx4_wqe_inline_seg),
372 sizeof (struct mlx4_wqe_data_seg));
373 default:
374 return sizeof (struct mlx4_wqe_ctrl_seg);
375 }
376 }
377
378 static int set_rq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
379 int is_user, int has_rq, struct mlx4_ib_qp *qp)
380 {
381 /* Sanity check RQ size before proceeding */
382 if (cap->max_recv_wr > dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE ||
383 cap->max_recv_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg))
384 return -EINVAL;
385
386 if (!has_rq) {
387 if (cap->max_recv_wr)
388 return -EINVAL;
389
390 qp->rq.wqe_cnt = qp->rq.max_gs = 0;
391 } else {
392 /* HW requires >= 1 RQ entry with >= 1 gather entry */
393 if (is_user && (!cap->max_recv_wr || !cap->max_recv_sge))
394 return -EINVAL;
395
396 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, cap->max_recv_wr));
397 qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge));
398 qp->rq.wqe_shift = ilog2(qp->rq.max_gs * sizeof (struct mlx4_wqe_data_seg));
399 }
400
401 /* leave userspace return values as they were, so as not to break ABI */
402 if (is_user) {
403 cap->max_recv_wr = qp->rq.max_post = qp->rq.wqe_cnt;
404 cap->max_recv_sge = qp->rq.max_gs;
405 } else {
406 cap->max_recv_wr = qp->rq.max_post =
407 min(dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE, qp->rq.wqe_cnt);
408 cap->max_recv_sge = min(qp->rq.max_gs,
409 min(dev->dev->caps.max_sq_sg,
410 dev->dev->caps.max_rq_sg));
411 }
412
413 return 0;
414 }
415
416 static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
417 enum mlx4_ib_qp_type type, struct mlx4_ib_qp *qp)
418 {
419 int s;
420
421 /* Sanity check SQ size before proceeding */
422 if (cap->max_send_wr > (dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE) ||
423 cap->max_send_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg) ||
424 cap->max_inline_data + send_wqe_overhead(type, qp->flags) +
425 sizeof (struct mlx4_wqe_inline_seg) > dev->dev->caps.max_sq_desc_sz)
426 return -EINVAL;
427
428 /*
429 * For MLX transport we need 2 extra S/G entries:
430 * one for the header and one for the checksum at the end
431 */
432 if ((type == MLX4_IB_QPT_SMI || type == MLX4_IB_QPT_GSI ||
433 type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) &&
434 cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg)
435 return -EINVAL;
436
437 s = max(cap->max_send_sge * sizeof (struct mlx4_wqe_data_seg),
438 cap->max_inline_data + sizeof (struct mlx4_wqe_inline_seg)) +
439 send_wqe_overhead(type, qp->flags);
440
441 if (s > dev->dev->caps.max_sq_desc_sz)
442 return -EINVAL;
443
444 /*
445 * Hermon supports shrinking WQEs, such that a single work
446 * request can include multiple units of 1 << wqe_shift. This
447 * way, work requests can differ in size, and do not have to
448 * be a power of 2 in size, saving memory and speeding up send
449 * WR posting. Unfortunately, if we do this then the
450 * wqe_index field in CQEs can't be used to look up the WR ID
451 * anymore, so we do this only if selective signaling is off.
452 *
453 * Further, on 32-bit platforms, we can't use vmap() to make
454 * the QP buffer virtually contiguous. Thus we have to use
455 * constant-sized WRs to make sure a WR is always fully within
456 * a single page-sized chunk.
457 *
458 * Finally, we use NOP work requests to pad the end of the
459 * work queue, to avoid wrap-around in the middle of WR. We
460 * set NEC bit to avoid getting completions with error for
461 * these NOP WRs, but since NEC is only supported starting
462 * with firmware 2.2.232, we use constant-sized WRs for older
463 * firmware.
464 *
465 * And, since MLX QPs only support SEND, we use constant-sized
466 * WRs in this case.
467 *
468 * We look for the smallest value of wqe_shift such that the
469 * resulting number of wqes does not exceed device
470 * capabilities.
471 *
472 * We set WQE size to at least 64 bytes, this way stamping
473 * invalidates each WQE.
474 */
475 if (dev->dev->caps.fw_ver >= MLX4_FW_VER_WQE_CTRL_NEC &&
476 qp->sq_signal_bits && BITS_PER_LONG == 64 &&
477 type != MLX4_IB_QPT_SMI && type != MLX4_IB_QPT_GSI &&
478 !(type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_PROXY_SMI |
479 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER)))
480 qp->sq.wqe_shift = ilog2(64);
481 else
482 qp->sq.wqe_shift = ilog2(roundup_pow_of_two(s));
483
484 for (;;) {
485 qp->sq_max_wqes_per_wr = DIV_ROUND_UP(s, 1U << qp->sq.wqe_shift);
486
487 /*
488 * We need to leave 2 KB + 1 WR of headroom in the SQ to
489 * allow HW to prefetch.
490 */
491 qp->sq_spare_wqes = (2048 >> qp->sq.wqe_shift) + qp->sq_max_wqes_per_wr;
492 qp->sq.wqe_cnt = roundup_pow_of_two(cap->max_send_wr *
493 qp->sq_max_wqes_per_wr +
494 qp->sq_spare_wqes);
495
496 if (qp->sq.wqe_cnt <= dev->dev->caps.max_wqes)
497 break;
498
499 if (qp->sq_max_wqes_per_wr <= 1)
500 return -EINVAL;
501
502 ++qp->sq.wqe_shift;
503 }
504
505 qp->sq.max_gs = (min(dev->dev->caps.max_sq_desc_sz,
506 (qp->sq_max_wqes_per_wr << qp->sq.wqe_shift)) -
507 send_wqe_overhead(type, qp->flags)) /
508 sizeof (struct mlx4_wqe_data_seg);
509
510 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
511 (qp->sq.wqe_cnt << qp->sq.wqe_shift);
512 if (qp->rq.wqe_shift > qp->sq.wqe_shift) {
513 qp->rq.offset = 0;
514 qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift;
515 } else {
516 qp->rq.offset = qp->sq.wqe_cnt << qp->sq.wqe_shift;
517 qp->sq.offset = 0;
518 }
519
520 cap->max_send_wr = qp->sq.max_post =
521 (qp->sq.wqe_cnt - qp->sq_spare_wqes) / qp->sq_max_wqes_per_wr;
522 cap->max_send_sge = min(qp->sq.max_gs,
523 min(dev->dev->caps.max_sq_sg,
524 dev->dev->caps.max_rq_sg));
525 /* We don't support inline sends for kernel QPs (yet) */
526 cap->max_inline_data = 0;
527
528 return 0;
529 }
530
531 static int set_user_sq_size(struct mlx4_ib_dev *dev,
532 struct mlx4_ib_qp *qp,
533 struct mlx4_ib_create_qp *ucmd)
534 {
535 /* Sanity check SQ size before proceeding */
536 if ((1 << ucmd->log_sq_bb_count) > dev->dev->caps.max_wqes ||
537 ucmd->log_sq_stride >
538 ilog2(roundup_pow_of_two(dev->dev->caps.max_sq_desc_sz)) ||
539 ucmd->log_sq_stride < MLX4_IB_MIN_SQ_STRIDE)
540 return -EINVAL;
541
542 qp->sq.wqe_cnt = 1 << ucmd->log_sq_bb_count;
543 qp->sq.wqe_shift = ucmd->log_sq_stride;
544
545 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
546 (qp->sq.wqe_cnt << qp->sq.wqe_shift);
547
548 return 0;
549 }
550
551 static int alloc_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp)
552 {
553 int i;
554
555 qp->sqp_proxy_rcv =
556 kmalloc(sizeof (struct mlx4_ib_buf) * qp->rq.wqe_cnt,
557 GFP_KERNEL);
558 if (!qp->sqp_proxy_rcv)
559 return -ENOMEM;
560 for (i = 0; i < qp->rq.wqe_cnt; i++) {
561 qp->sqp_proxy_rcv[i].addr =
562 kmalloc(sizeof (struct mlx4_ib_proxy_sqp_hdr),
563 GFP_KERNEL);
564 if (!qp->sqp_proxy_rcv[i].addr)
565 goto err;
566 qp->sqp_proxy_rcv[i].map =
567 ib_dma_map_single(dev, qp->sqp_proxy_rcv[i].addr,
568 sizeof (struct mlx4_ib_proxy_sqp_hdr),
569 DMA_FROM_DEVICE);
570 if (ib_dma_mapping_error(dev, qp->sqp_proxy_rcv[i].map)) {
571 kfree(qp->sqp_proxy_rcv[i].addr);
572 goto err;
573 }
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 void mlx4_ib_free_qp_counter(struct mlx4_ib_dev *dev,
622 struct mlx4_ib_qp *qp)
623 {
624 mutex_lock(&dev->counters_table[qp->port - 1].mutex);
625 mlx4_counter_free(dev->dev, qp->counter_index->index);
626 list_del(&qp->counter_index->list);
627 mutex_unlock(&dev->counters_table[qp->port - 1].mutex);
628
629 kfree(qp->counter_index);
630 qp->counter_index = NULL;
631 }
632
633 static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
634 struct ib_qp_init_attr *init_attr,
635 struct ib_udata *udata, int sqpn, struct mlx4_ib_qp **caller_qp,
636 gfp_t gfp)
637 {
638 int qpn;
639 int err;
640 struct mlx4_ib_sqp *sqp;
641 struct mlx4_ib_qp *qp;
642 enum mlx4_ib_qp_type qp_type = (enum mlx4_ib_qp_type) init_attr->qp_type;
643 struct mlx4_ib_cq *mcq;
644 unsigned long flags;
645
646 /* When tunneling special qps, we use a plain UD qp */
647 if (sqpn) {
648 if (mlx4_is_mfunc(dev->dev) &&
649 (!mlx4_is_master(dev->dev) ||
650 !(init_attr->create_flags & MLX4_IB_SRIOV_SQP))) {
651 if (init_attr->qp_type == IB_QPT_GSI)
652 qp_type = MLX4_IB_QPT_PROXY_GSI;
653 else {
654 if (mlx4_is_master(dev->dev) ||
655 qp0_enabled_vf(dev->dev, sqpn))
656 qp_type = MLX4_IB_QPT_PROXY_SMI_OWNER;
657 else
658 qp_type = MLX4_IB_QPT_PROXY_SMI;
659 }
660 }
661 qpn = sqpn;
662 /* add extra sg entry for tunneling */
663 init_attr->cap.max_recv_sge++;
664 } else if (init_attr->create_flags & MLX4_IB_SRIOV_TUNNEL_QP) {
665 struct mlx4_ib_qp_tunnel_init_attr *tnl_init =
666 container_of(init_attr,
667 struct mlx4_ib_qp_tunnel_init_attr, init_attr);
668 if ((tnl_init->proxy_qp_type != IB_QPT_SMI &&
669 tnl_init->proxy_qp_type != IB_QPT_GSI) ||
670 !mlx4_is_master(dev->dev))
671 return -EINVAL;
672 if (tnl_init->proxy_qp_type == IB_QPT_GSI)
673 qp_type = MLX4_IB_QPT_TUN_GSI;
674 else if (tnl_init->slave == mlx4_master_func_num(dev->dev) ||
675 mlx4_vf_smi_enabled(dev->dev, tnl_init->slave,
676 tnl_init->port))
677 qp_type = MLX4_IB_QPT_TUN_SMI_OWNER;
678 else
679 qp_type = MLX4_IB_QPT_TUN_SMI;
680 /* we are definitely in the PPF here, since we are creating
681 * tunnel QPs. base_tunnel_sqpn is therefore valid. */
682 qpn = dev->dev->phys_caps.base_tunnel_sqpn + 8 * tnl_init->slave
683 + tnl_init->proxy_qp_type * 2 + tnl_init->port - 1;
684 sqpn = qpn;
685 }
686
687 if (!*caller_qp) {
688 if (qp_type == MLX4_IB_QPT_SMI || qp_type == MLX4_IB_QPT_GSI ||
689 (qp_type & (MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_SMI_OWNER |
690 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER))) {
691 sqp = kzalloc(sizeof (struct mlx4_ib_sqp), gfp);
692 if (!sqp)
693 return -ENOMEM;
694 qp = &sqp->qp;
695 qp->pri.vid = 0xFFFF;
696 qp->alt.vid = 0xFFFF;
697 } else {
698 qp = kzalloc(sizeof (struct mlx4_ib_qp), gfp);
699 if (!qp)
700 return -ENOMEM;
701 qp->pri.vid = 0xFFFF;
702 qp->alt.vid = 0xFFFF;
703 }
704 } else
705 qp = *caller_qp;
706
707 qp->mlx4_ib_qp_type = qp_type;
708
709 mutex_init(&qp->mutex);
710 spin_lock_init(&qp->sq.lock);
711 spin_lock_init(&qp->rq.lock);
712 INIT_LIST_HEAD(&qp->gid_list);
713 INIT_LIST_HEAD(&qp->steering_rules);
714
715 qp->state = IB_QPS_RESET;
716 if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
717 qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
718
719 err = set_rq_size(dev, &init_attr->cap, !!pd->uobject, qp_has_rq(init_attr), qp);
720 if (err)
721 goto err;
722
723 if (pd->uobject) {
724 struct mlx4_ib_create_qp ucmd;
725
726 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
727 err = -EFAULT;
728 goto err;
729 }
730
731 qp->sq_no_prefetch = ucmd.sq_no_prefetch;
732
733 err = set_user_sq_size(dev, qp, &ucmd);
734 if (err)
735 goto err;
736
737 qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
738 qp->buf_size, 0, 0);
739 if (IS_ERR(qp->umem)) {
740 err = PTR_ERR(qp->umem);
741 goto err;
742 }
743
744 err = mlx4_mtt_init(dev->dev, ib_umem_page_count(qp->umem),
745 ilog2(qp->umem->page_size), &qp->mtt);
746 if (err)
747 goto err_buf;
748
749 err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem);
750 if (err)
751 goto err_mtt;
752
753 if (qp_has_rq(init_attr)) {
754 err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context),
755 ucmd.db_addr, &qp->db);
756 if (err)
757 goto err_mtt;
758 }
759 } else {
760 qp->sq_no_prefetch = 0;
761
762 if (init_attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO)
763 qp->flags |= MLX4_IB_QP_LSO;
764
765 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) {
766 if (dev->steering_support ==
767 MLX4_STEERING_MODE_DEVICE_MANAGED)
768 qp->flags |= MLX4_IB_QP_NETIF;
769 else
770 goto err;
771 }
772
773 err = set_kernel_sq_size(dev, &init_attr->cap, qp_type, qp);
774 if (err)
775 goto err;
776
777 if (qp_has_rq(init_attr)) {
778 err = mlx4_db_alloc(dev->dev, &qp->db, 0, gfp);
779 if (err)
780 goto err;
781
782 *qp->db.db = 0;
783 }
784
785 if (mlx4_buf_alloc(dev->dev, qp->buf_size, PAGE_SIZE * 2, &qp->buf, gfp)) {
786 err = -ENOMEM;
787 goto err_db;
788 }
789
790 err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift,
791 &qp->mtt);
792 if (err)
793 goto err_buf;
794
795 err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf, gfp);
796 if (err)
797 goto err_mtt;
798
799 qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof(u64), gfp);
800 if (!qp->sq.wrid)
801 qp->sq.wrid = __vmalloc(qp->sq.wqe_cnt * sizeof(u64),
802 gfp, PAGE_KERNEL);
803 qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof(u64), gfp);
804 if (!qp->rq.wrid)
805 qp->rq.wrid = __vmalloc(qp->rq.wqe_cnt * sizeof(u64),
806 gfp, PAGE_KERNEL);
807 if (!qp->sq.wrid || !qp->rq.wrid) {
808 err = -ENOMEM;
809 goto err_wrid;
810 }
811 }
812
813 if (sqpn) {
814 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
815 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
816 if (alloc_proxy_bufs(pd->device, qp)) {
817 err = -ENOMEM;
818 goto err_wrid;
819 }
820 }
821 } else {
822 /* Raw packet QPNs may not have bits 6,7 set in their qp_num;
823 * otherwise, the WQE BlueFlame setup flow wrongly causes
824 * VLAN insertion. */
825 if (init_attr->qp_type == IB_QPT_RAW_PACKET)
826 err = mlx4_qp_reserve_range(dev->dev, 1, 1, &qpn,
827 (init_attr->cap.max_send_wr ?
828 MLX4_RESERVE_ETH_BF_QP : 0) |
829 (init_attr->cap.max_recv_wr ?
830 MLX4_RESERVE_A0_QP : 0));
831 else
832 if (qp->flags & MLX4_IB_QP_NETIF)
833 err = mlx4_ib_steer_qp_alloc(dev, 1, &qpn);
834 else
835 err = mlx4_qp_reserve_range(dev->dev, 1, 1,
836 &qpn, 0);
837 if (err)
838 goto err_proxy;
839 }
840
841 if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK)
842 qp->flags |= MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK;
843
844 err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp, gfp);
845 if (err)
846 goto err_qpn;
847
848 if (init_attr->qp_type == IB_QPT_XRC_TGT)
849 qp->mqp.qpn |= (1 << 23);
850
851 /*
852 * Hardware wants QPN written in big-endian order (after
853 * shifting) for send doorbell. Precompute this value to save
854 * a little bit when posting sends.
855 */
856 qp->doorbell_qpn = swab32(qp->mqp.qpn << 8);
857
858 qp->mqp.event = mlx4_ib_qp_event;
859 if (!*caller_qp)
860 *caller_qp = qp;
861
862 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags);
863 mlx4_ib_lock_cqs(to_mcq(init_attr->send_cq),
864 to_mcq(init_attr->recv_cq));
865 /* Maintain device to QPs access, needed for further handling
866 * via reset flow
867 */
868 list_add_tail(&qp->qps_list, &dev->qp_list);
869 /* Maintain CQ to QPs access, needed for further handling
870 * via reset flow
871 */
872 mcq = to_mcq(init_attr->send_cq);
873 list_add_tail(&qp->cq_send_list, &mcq->send_qp_list);
874 mcq = to_mcq(init_attr->recv_cq);
875 list_add_tail(&qp->cq_recv_list, &mcq->recv_qp_list);
876 mlx4_ib_unlock_cqs(to_mcq(init_attr->send_cq),
877 to_mcq(init_attr->recv_cq));
878 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags);
879 return 0;
880
881 err_qpn:
882 if (!sqpn) {
883 if (qp->flags & MLX4_IB_QP_NETIF)
884 mlx4_ib_steer_qp_free(dev, qpn, 1);
885 else
886 mlx4_qp_release_range(dev->dev, qpn, 1);
887 }
888 err_proxy:
889 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI)
890 free_proxy_bufs(pd->device, qp);
891 err_wrid:
892 if (pd->uobject) {
893 if (qp_has_rq(init_attr))
894 mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db);
895 } else {
896 kvfree(qp->sq.wrid);
897 kvfree(qp->rq.wrid);
898 }
899
900 err_mtt:
901 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
902
903 err_buf:
904 if (pd->uobject)
905 ib_umem_release(qp->umem);
906 else
907 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
908
909 err_db:
910 if (!pd->uobject && qp_has_rq(init_attr))
911 mlx4_db_free(dev->dev, &qp->db);
912
913 err:
914 if (!*caller_qp)
915 kfree(qp);
916 return err;
917 }
918
919 static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state)
920 {
921 switch (state) {
922 case IB_QPS_RESET: return MLX4_QP_STATE_RST;
923 case IB_QPS_INIT: return MLX4_QP_STATE_INIT;
924 case IB_QPS_RTR: return MLX4_QP_STATE_RTR;
925 case IB_QPS_RTS: return MLX4_QP_STATE_RTS;
926 case IB_QPS_SQD: return MLX4_QP_STATE_SQD;
927 case IB_QPS_SQE: return MLX4_QP_STATE_SQER;
928 case IB_QPS_ERR: return MLX4_QP_STATE_ERR;
929 default: return -1;
930 }
931 }
932
933 static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
934 __acquires(&send_cq->lock) __acquires(&recv_cq->lock)
935 {
936 if (send_cq == recv_cq) {
937 spin_lock(&send_cq->lock);
938 __acquire(&recv_cq->lock);
939 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
940 spin_lock(&send_cq->lock);
941 spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING);
942 } else {
943 spin_lock(&recv_cq->lock);
944 spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING);
945 }
946 }
947
948 static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
949 __releases(&send_cq->lock) __releases(&recv_cq->lock)
950 {
951 if (send_cq == recv_cq) {
952 __release(&recv_cq->lock);
953 spin_unlock(&send_cq->lock);
954 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
955 spin_unlock(&recv_cq->lock);
956 spin_unlock(&send_cq->lock);
957 } else {
958 spin_unlock(&send_cq->lock);
959 spin_unlock(&recv_cq->lock);
960 }
961 }
962
963 static void del_gid_entries(struct mlx4_ib_qp *qp)
964 {
965 struct mlx4_ib_gid_entry *ge, *tmp;
966
967 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
968 list_del(&ge->list);
969 kfree(ge);
970 }
971 }
972
973 static struct mlx4_ib_pd *get_pd(struct mlx4_ib_qp *qp)
974 {
975 if (qp->ibqp.qp_type == IB_QPT_XRC_TGT)
976 return to_mpd(to_mxrcd(qp->ibqp.xrcd)->pd);
977 else
978 return to_mpd(qp->ibqp.pd);
979 }
980
981 static void get_cqs(struct mlx4_ib_qp *qp,
982 struct mlx4_ib_cq **send_cq, struct mlx4_ib_cq **recv_cq)
983 {
984 switch (qp->ibqp.qp_type) {
985 case IB_QPT_XRC_TGT:
986 *send_cq = to_mcq(to_mxrcd(qp->ibqp.xrcd)->cq);
987 *recv_cq = *send_cq;
988 break;
989 case IB_QPT_XRC_INI:
990 *send_cq = to_mcq(qp->ibqp.send_cq);
991 *recv_cq = *send_cq;
992 break;
993 default:
994 *send_cq = to_mcq(qp->ibqp.send_cq);
995 *recv_cq = to_mcq(qp->ibqp.recv_cq);
996 break;
997 }
998 }
999
1000 static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
1001 int is_user)
1002 {
1003 struct mlx4_ib_cq *send_cq, *recv_cq;
1004 unsigned long flags;
1005
1006 if (qp->state != IB_QPS_RESET) {
1007 if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state),
1008 MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp))
1009 pr_warn("modify QP %06x to RESET failed.\n",
1010 qp->mqp.qpn);
1011 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) {
1012 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
1013 qp->pri.smac = 0;
1014 qp->pri.smac_port = 0;
1015 }
1016 if (qp->alt.smac) {
1017 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
1018 qp->alt.smac = 0;
1019 }
1020 if (qp->pri.vid < 0x1000) {
1021 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid);
1022 qp->pri.vid = 0xFFFF;
1023 qp->pri.candidate_vid = 0xFFFF;
1024 qp->pri.update_vid = 0;
1025 }
1026 if (qp->alt.vid < 0x1000) {
1027 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid);
1028 qp->alt.vid = 0xFFFF;
1029 qp->alt.candidate_vid = 0xFFFF;
1030 qp->alt.update_vid = 0;
1031 }
1032 }
1033
1034 get_cqs(qp, &send_cq, &recv_cq);
1035
1036 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags);
1037 mlx4_ib_lock_cqs(send_cq, recv_cq);
1038
1039 /* del from lists under both locks above to protect reset flow paths */
1040 list_del(&qp->qps_list);
1041 list_del(&qp->cq_send_list);
1042 list_del(&qp->cq_recv_list);
1043 if (!is_user) {
1044 __mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
1045 qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL);
1046 if (send_cq != recv_cq)
1047 __mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1048 }
1049
1050 mlx4_qp_remove(dev->dev, &qp->mqp);
1051
1052 mlx4_ib_unlock_cqs(send_cq, recv_cq);
1053 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags);
1054
1055 mlx4_qp_free(dev->dev, &qp->mqp);
1056
1057 if (!is_sqp(dev, qp) && !is_tunnel_qp(dev, qp)) {
1058 if (qp->flags & MLX4_IB_QP_NETIF)
1059 mlx4_ib_steer_qp_free(dev, qp->mqp.qpn, 1);
1060 else
1061 mlx4_qp_release_range(dev->dev, qp->mqp.qpn, 1);
1062 }
1063
1064 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
1065
1066 if (is_user) {
1067 if (qp->rq.wqe_cnt)
1068 mlx4_ib_db_unmap_user(to_mucontext(qp->ibqp.uobject->context),
1069 &qp->db);
1070 ib_umem_release(qp->umem);
1071 } else {
1072 kvfree(qp->sq.wrid);
1073 kvfree(qp->rq.wrid);
1074 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
1075 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI))
1076 free_proxy_bufs(&dev->ib_dev, qp);
1077 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
1078 if (qp->rq.wqe_cnt)
1079 mlx4_db_free(dev->dev, &qp->db);
1080 }
1081
1082 del_gid_entries(qp);
1083 }
1084
1085 static u32 get_sqp_num(struct mlx4_ib_dev *dev, struct ib_qp_init_attr *attr)
1086 {
1087 /* Native or PPF */
1088 if (!mlx4_is_mfunc(dev->dev) ||
1089 (mlx4_is_master(dev->dev) &&
1090 attr->create_flags & MLX4_IB_SRIOV_SQP)) {
1091 return dev->dev->phys_caps.base_sqpn +
1092 (attr->qp_type == IB_QPT_SMI ? 0 : 2) +
1093 attr->port_num - 1;
1094 }
1095 /* PF or VF -- creating proxies */
1096 if (attr->qp_type == IB_QPT_SMI)
1097 return dev->dev->caps.qp0_proxy[attr->port_num - 1];
1098 else
1099 return dev->dev->caps.qp1_proxy[attr->port_num - 1];
1100 }
1101
1102 struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd,
1103 struct ib_qp_init_attr *init_attr,
1104 struct ib_udata *udata)
1105 {
1106 struct mlx4_ib_qp *qp = NULL;
1107 int err;
1108 int sup_u_create_flags = MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK;
1109 u16 xrcdn = 0;
1110 gfp_t gfp;
1111
1112 gfp = (init_attr->create_flags & MLX4_IB_QP_CREATE_USE_GFP_NOIO) ?
1113 GFP_NOIO : GFP_KERNEL;
1114 /*
1115 * We only support LSO, vendor flag1, and multicast loopback blocking,
1116 * and only for kernel UD QPs.
1117 */
1118 if (init_attr->create_flags & ~(MLX4_IB_QP_LSO |
1119 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK |
1120 MLX4_IB_SRIOV_TUNNEL_QP |
1121 MLX4_IB_SRIOV_SQP |
1122 MLX4_IB_QP_NETIF |
1123 MLX4_IB_QP_CREATE_USE_GFP_NOIO))
1124 return ERR_PTR(-EINVAL);
1125
1126 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) {
1127 if (init_attr->qp_type != IB_QPT_UD)
1128 return ERR_PTR(-EINVAL);
1129 }
1130
1131 if (init_attr->create_flags &&
1132 ((udata && init_attr->create_flags & ~(sup_u_create_flags)) ||
1133 ((init_attr->create_flags & ~(MLX4_IB_SRIOV_SQP |
1134 MLX4_IB_QP_CREATE_USE_GFP_NOIO |
1135 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK)) &&
1136 init_attr->qp_type != IB_QPT_UD) ||
1137 ((init_attr->create_flags & MLX4_IB_SRIOV_SQP) &&
1138 init_attr->qp_type > IB_QPT_GSI)))
1139 return ERR_PTR(-EINVAL);
1140
1141 switch (init_attr->qp_type) {
1142 case IB_QPT_XRC_TGT:
1143 pd = to_mxrcd(init_attr->xrcd)->pd;
1144 xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn;
1145 init_attr->send_cq = to_mxrcd(init_attr->xrcd)->cq;
1146 /* fall through */
1147 case IB_QPT_XRC_INI:
1148 if (!(to_mdev(pd->device)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC))
1149 return ERR_PTR(-ENOSYS);
1150 init_attr->recv_cq = init_attr->send_cq;
1151 /* fall through */
1152 case IB_QPT_RC:
1153 case IB_QPT_UC:
1154 case IB_QPT_RAW_PACKET:
1155 qp = kzalloc(sizeof *qp, gfp);
1156 if (!qp)
1157 return ERR_PTR(-ENOMEM);
1158 qp->pri.vid = 0xFFFF;
1159 qp->alt.vid = 0xFFFF;
1160 /* fall through */
1161 case IB_QPT_UD:
1162 {
1163 err = create_qp_common(to_mdev(pd->device), pd, init_attr,
1164 udata, 0, &qp, gfp);
1165 if (err)
1166 return ERR_PTR(err);
1167
1168 qp->ibqp.qp_num = qp->mqp.qpn;
1169 qp->xrcdn = xrcdn;
1170
1171 break;
1172 }
1173 case IB_QPT_SMI:
1174 case IB_QPT_GSI:
1175 {
1176 /* Userspace is not allowed to create special QPs: */
1177 if (udata)
1178 return ERR_PTR(-EINVAL);
1179
1180 err = create_qp_common(to_mdev(pd->device), pd, init_attr, udata,
1181 get_sqp_num(to_mdev(pd->device), init_attr),
1182 &qp, gfp);
1183 if (err)
1184 return ERR_PTR(err);
1185
1186 qp->port = init_attr->port_num;
1187 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
1188
1189 break;
1190 }
1191 default:
1192 /* Don't support raw QPs */
1193 return ERR_PTR(-EINVAL);
1194 }
1195
1196 return &qp->ibqp;
1197 }
1198
1199 int mlx4_ib_destroy_qp(struct ib_qp *qp)
1200 {
1201 struct mlx4_ib_dev *dev = to_mdev(qp->device);
1202 struct mlx4_ib_qp *mqp = to_mqp(qp);
1203 struct mlx4_ib_pd *pd;
1204
1205 if (is_qp0(dev, mqp))
1206 mlx4_CLOSE_PORT(dev->dev, mqp->port);
1207
1208 if (dev->qp1_proxy[mqp->port - 1] == mqp) {
1209 mutex_lock(&dev->qp1_proxy_lock[mqp->port - 1]);
1210 dev->qp1_proxy[mqp->port - 1] = NULL;
1211 mutex_unlock(&dev->qp1_proxy_lock[mqp->port - 1]);
1212 }
1213
1214 if (mqp->counter_index)
1215 mlx4_ib_free_qp_counter(dev, mqp);
1216
1217 pd = get_pd(mqp);
1218 destroy_qp_common(dev, mqp, !!pd->ibpd.uobject);
1219
1220 if (is_sqp(dev, mqp))
1221 kfree(to_msqp(mqp));
1222 else
1223 kfree(mqp);
1224
1225 return 0;
1226 }
1227
1228 static int to_mlx4_st(struct mlx4_ib_dev *dev, enum mlx4_ib_qp_type type)
1229 {
1230 switch (type) {
1231 case MLX4_IB_QPT_RC: return MLX4_QP_ST_RC;
1232 case MLX4_IB_QPT_UC: return MLX4_QP_ST_UC;
1233 case MLX4_IB_QPT_UD: return MLX4_QP_ST_UD;
1234 case MLX4_IB_QPT_XRC_INI:
1235 case MLX4_IB_QPT_XRC_TGT: return MLX4_QP_ST_XRC;
1236 case MLX4_IB_QPT_SMI:
1237 case MLX4_IB_QPT_GSI:
1238 case MLX4_IB_QPT_RAW_PACKET: return MLX4_QP_ST_MLX;
1239
1240 case MLX4_IB_QPT_PROXY_SMI_OWNER:
1241 case MLX4_IB_QPT_TUN_SMI_OWNER: return (mlx4_is_mfunc(dev->dev) ?
1242 MLX4_QP_ST_MLX : -1);
1243 case MLX4_IB_QPT_PROXY_SMI:
1244 case MLX4_IB_QPT_TUN_SMI:
1245 case MLX4_IB_QPT_PROXY_GSI:
1246 case MLX4_IB_QPT_TUN_GSI: return (mlx4_is_mfunc(dev->dev) ?
1247 MLX4_QP_ST_UD : -1);
1248 default: return -1;
1249 }
1250 }
1251
1252 static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, const struct ib_qp_attr *attr,
1253 int attr_mask)
1254 {
1255 u8 dest_rd_atomic;
1256 u32 access_flags;
1257 u32 hw_access_flags = 0;
1258
1259 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1260 dest_rd_atomic = attr->max_dest_rd_atomic;
1261 else
1262 dest_rd_atomic = qp->resp_depth;
1263
1264 if (attr_mask & IB_QP_ACCESS_FLAGS)
1265 access_flags = attr->qp_access_flags;
1266 else
1267 access_flags = qp->atomic_rd_en;
1268
1269 if (!dest_rd_atomic)
1270 access_flags &= IB_ACCESS_REMOTE_WRITE;
1271
1272 if (access_flags & IB_ACCESS_REMOTE_READ)
1273 hw_access_flags |= MLX4_QP_BIT_RRE;
1274 if (access_flags & IB_ACCESS_REMOTE_ATOMIC)
1275 hw_access_flags |= MLX4_QP_BIT_RAE;
1276 if (access_flags & IB_ACCESS_REMOTE_WRITE)
1277 hw_access_flags |= MLX4_QP_BIT_RWE;
1278
1279 return cpu_to_be32(hw_access_flags);
1280 }
1281
1282 static void store_sqp_attrs(struct mlx4_ib_sqp *sqp, const struct ib_qp_attr *attr,
1283 int attr_mask)
1284 {
1285 if (attr_mask & IB_QP_PKEY_INDEX)
1286 sqp->pkey_index = attr->pkey_index;
1287 if (attr_mask & IB_QP_QKEY)
1288 sqp->qkey = attr->qkey;
1289 if (attr_mask & IB_QP_SQ_PSN)
1290 sqp->send_psn = attr->sq_psn;
1291 }
1292
1293 static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port)
1294 {
1295 path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6);
1296 }
1297
1298 static int _mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah,
1299 u64 smac, u16 vlan_tag, struct mlx4_qp_path *path,
1300 struct mlx4_roce_smac_vlan_info *smac_info, u8 port)
1301 {
1302 int is_eth = rdma_port_get_link_layer(&dev->ib_dev, port) ==
1303 IB_LINK_LAYER_ETHERNET;
1304 int vidx;
1305 int smac_index;
1306 int err;
1307
1308
1309 path->grh_mylmc = ah->src_path_bits & 0x7f;
1310 path->rlid = cpu_to_be16(ah->dlid);
1311 if (ah->static_rate) {
1312 path->static_rate = ah->static_rate + MLX4_STAT_RATE_OFFSET;
1313 while (path->static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
1314 !(1 << path->static_rate & dev->dev->caps.stat_rate_support))
1315 --path->static_rate;
1316 } else
1317 path->static_rate = 0;
1318
1319 if (ah->ah_flags & IB_AH_GRH) {
1320 int real_sgid_index = mlx4_ib_gid_index_to_real_index(dev,
1321 port,
1322 ah->grh.sgid_index);
1323
1324 if (real_sgid_index >= dev->dev->caps.gid_table_len[port]) {
1325 pr_err("sgid_index (%u) too large. max is %d\n",
1326 real_sgid_index, dev->dev->caps.gid_table_len[port] - 1);
1327 return -1;
1328 }
1329
1330 path->grh_mylmc |= 1 << 7;
1331 path->mgid_index = real_sgid_index;
1332 path->hop_limit = ah->grh.hop_limit;
1333 path->tclass_flowlabel =
1334 cpu_to_be32((ah->grh.traffic_class << 20) |
1335 (ah->grh.flow_label));
1336 memcpy(path->rgid, ah->grh.dgid.raw, 16);
1337 }
1338
1339 if (is_eth) {
1340 if (!(ah->ah_flags & IB_AH_GRH))
1341 return -1;
1342
1343 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
1344 ((port - 1) << 6) | ((ah->sl & 7) << 3);
1345
1346 path->feup |= MLX4_FEUP_FORCE_ETH_UP;
1347 if (vlan_tag < 0x1000) {
1348 if (smac_info->vid < 0x1000) {
1349 /* both valid vlan ids */
1350 if (smac_info->vid != vlan_tag) {
1351 /* different VIDs. unreg old and reg new */
1352 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx);
1353 if (err)
1354 return err;
1355 smac_info->candidate_vid = vlan_tag;
1356 smac_info->candidate_vlan_index = vidx;
1357 smac_info->candidate_vlan_port = port;
1358 smac_info->update_vid = 1;
1359 path->vlan_index = vidx;
1360 } else {
1361 path->vlan_index = smac_info->vlan_index;
1362 }
1363 } else {
1364 /* no current vlan tag in qp */
1365 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx);
1366 if (err)
1367 return err;
1368 smac_info->candidate_vid = vlan_tag;
1369 smac_info->candidate_vlan_index = vidx;
1370 smac_info->candidate_vlan_port = port;
1371 smac_info->update_vid = 1;
1372 path->vlan_index = vidx;
1373 }
1374 path->feup |= MLX4_FVL_FORCE_ETH_VLAN;
1375 path->fl = 1 << 6;
1376 } else {
1377 /* have current vlan tag. unregister it at modify-qp success */
1378 if (smac_info->vid < 0x1000) {
1379 smac_info->candidate_vid = 0xFFFF;
1380 smac_info->update_vid = 1;
1381 }
1382 }
1383
1384 /* get smac_index for RoCE use.
1385 * If no smac was yet assigned, register one.
1386 * If one was already assigned, but the new mac differs,
1387 * unregister the old one and register the new one.
1388 */
1389 if ((!smac_info->smac && !smac_info->smac_port) ||
1390 smac_info->smac != smac) {
1391 /* register candidate now, unreg if needed, after success */
1392 smac_index = mlx4_register_mac(dev->dev, port, smac);
1393 if (smac_index >= 0) {
1394 smac_info->candidate_smac_index = smac_index;
1395 smac_info->candidate_smac = smac;
1396 smac_info->candidate_smac_port = port;
1397 } else {
1398 return -EINVAL;
1399 }
1400 } else {
1401 smac_index = smac_info->smac_index;
1402 }
1403
1404 memcpy(path->dmac, ah->dmac, 6);
1405 path->ackto = MLX4_IB_LINK_TYPE_ETH;
1406 /* put MAC table smac index for IBoE */
1407 path->grh_mylmc = (u8) (smac_index) | 0x80;
1408 } else {
1409 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
1410 ((port - 1) << 6) | ((ah->sl & 0xf) << 2);
1411 }
1412
1413 return 0;
1414 }
1415
1416 static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_qp_attr *qp,
1417 enum ib_qp_attr_mask qp_attr_mask,
1418 struct mlx4_ib_qp *mqp,
1419 struct mlx4_qp_path *path, u8 port,
1420 u16 vlan_id, u8 *smac)
1421 {
1422 return _mlx4_set_path(dev, &qp->ah_attr,
1423 mlx4_mac_to_u64(smac),
1424 vlan_id,
1425 path, &mqp->pri, port);
1426 }
1427
1428 static int mlx4_set_alt_path(struct mlx4_ib_dev *dev,
1429 const struct ib_qp_attr *qp,
1430 enum ib_qp_attr_mask qp_attr_mask,
1431 struct mlx4_ib_qp *mqp,
1432 struct mlx4_qp_path *path, u8 port)
1433 {
1434 return _mlx4_set_path(dev, &qp->alt_ah_attr,
1435 0,
1436 0xffff,
1437 path, &mqp->alt, port);
1438 }
1439
1440 static void update_mcg_macs(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
1441 {
1442 struct mlx4_ib_gid_entry *ge, *tmp;
1443
1444 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
1445 if (!ge->added && mlx4_ib_add_mc(dev, qp, &ge->gid)) {
1446 ge->added = 1;
1447 ge->port = qp->port;
1448 }
1449 }
1450 }
1451
1452 static int handle_eth_ud_smac_index(struct mlx4_ib_dev *dev,
1453 struct mlx4_ib_qp *qp,
1454 struct mlx4_qp_context *context)
1455 {
1456 u64 u64_mac;
1457 int smac_index;
1458
1459 u64_mac = atomic64_read(&dev->iboe.mac[qp->port - 1]);
1460
1461 context->pri_path.sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | ((qp->port - 1) << 6);
1462 if (!qp->pri.smac && !qp->pri.smac_port) {
1463 smac_index = mlx4_register_mac(dev->dev, qp->port, u64_mac);
1464 if (smac_index >= 0) {
1465 qp->pri.candidate_smac_index = smac_index;
1466 qp->pri.candidate_smac = u64_mac;
1467 qp->pri.candidate_smac_port = qp->port;
1468 context->pri_path.grh_mylmc = 0x80 | (u8) smac_index;
1469 } else {
1470 return -ENOENT;
1471 }
1472 }
1473 return 0;
1474 }
1475
1476 static int create_qp_lb_counter(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
1477 {
1478 struct counter_index *new_counter_index;
1479 int err;
1480 u32 tmp_idx;
1481
1482 if (rdma_port_get_link_layer(&dev->ib_dev, qp->port) !=
1483 IB_LINK_LAYER_ETHERNET ||
1484 !(qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK) ||
1485 !(dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_LB_SRC_CHK))
1486 return 0;
1487
1488 err = mlx4_counter_alloc(dev->dev, &tmp_idx);
1489 if (err)
1490 return err;
1491
1492 new_counter_index = kmalloc(sizeof(*new_counter_index), GFP_KERNEL);
1493 if (!new_counter_index) {
1494 mlx4_counter_free(dev->dev, tmp_idx);
1495 return -ENOMEM;
1496 }
1497
1498 new_counter_index->index = tmp_idx;
1499 new_counter_index->allocated = 1;
1500 qp->counter_index = new_counter_index;
1501
1502 mutex_lock(&dev->counters_table[qp->port - 1].mutex);
1503 list_add_tail(&new_counter_index->list,
1504 &dev->counters_table[qp->port - 1].counters_list);
1505 mutex_unlock(&dev->counters_table[qp->port - 1].mutex);
1506
1507 return 0;
1508 }
1509
1510 static int __mlx4_ib_modify_qp(struct ib_qp *ibqp,
1511 const struct ib_qp_attr *attr, int attr_mask,
1512 enum ib_qp_state cur_state, enum ib_qp_state new_state)
1513 {
1514 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
1515 struct mlx4_ib_qp *qp = to_mqp(ibqp);
1516 struct mlx4_ib_pd *pd;
1517 struct mlx4_ib_cq *send_cq, *recv_cq;
1518 struct mlx4_qp_context *context;
1519 enum mlx4_qp_optpar optpar = 0;
1520 int sqd_event;
1521 int steer_qp = 0;
1522 int err = -EINVAL;
1523 int counter_index;
1524
1525 /* APM is not supported under RoCE */
1526 if (attr_mask & IB_QP_ALT_PATH &&
1527 rdma_port_get_link_layer(&dev->ib_dev, qp->port) ==
1528 IB_LINK_LAYER_ETHERNET)
1529 return -ENOTSUPP;
1530
1531 context = kzalloc(sizeof *context, GFP_KERNEL);
1532 if (!context)
1533 return -ENOMEM;
1534
1535 context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) |
1536 (to_mlx4_st(dev, qp->mlx4_ib_qp_type) << 16));
1537
1538 if (!(attr_mask & IB_QP_PATH_MIG_STATE))
1539 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
1540 else {
1541 optpar |= MLX4_QP_OPTPAR_PM_STATE;
1542 switch (attr->path_mig_state) {
1543 case IB_MIG_MIGRATED:
1544 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
1545 break;
1546 case IB_MIG_REARM:
1547 context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11);
1548 break;
1549 case IB_MIG_ARMED:
1550 context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11);
1551 break;
1552 }
1553 }
1554
1555 if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI)
1556 context->mtu_msgmax = (IB_MTU_4096 << 5) | 11;
1557 else if (ibqp->qp_type == IB_QPT_RAW_PACKET)
1558 context->mtu_msgmax = (MLX4_RAW_QP_MTU << 5) | MLX4_RAW_QP_MSGMAX;
1559 else if (ibqp->qp_type == IB_QPT_UD) {
1560 if (qp->flags & MLX4_IB_QP_LSO)
1561 context->mtu_msgmax = (IB_MTU_4096 << 5) |
1562 ilog2(dev->dev->caps.max_gso_sz);
1563 else
1564 context->mtu_msgmax = (IB_MTU_4096 << 5) | 12;
1565 } else if (attr_mask & IB_QP_PATH_MTU) {
1566 if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) {
1567 pr_err("path MTU (%u) is invalid\n",
1568 attr->path_mtu);
1569 goto out;
1570 }
1571 context->mtu_msgmax = (attr->path_mtu << 5) |
1572 ilog2(dev->dev->caps.max_msg_sz);
1573 }
1574
1575 if (qp->rq.wqe_cnt)
1576 context->rq_size_stride = ilog2(qp->rq.wqe_cnt) << 3;
1577 context->rq_size_stride |= qp->rq.wqe_shift - 4;
1578
1579 if (qp->sq.wqe_cnt)
1580 context->sq_size_stride = ilog2(qp->sq.wqe_cnt) << 3;
1581 context->sq_size_stride |= qp->sq.wqe_shift - 4;
1582
1583 if (new_state == IB_QPS_RESET && qp->counter_index)
1584 mlx4_ib_free_qp_counter(dev, qp);
1585
1586 if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
1587 context->sq_size_stride |= !!qp->sq_no_prefetch << 7;
1588 context->xrcd = cpu_to_be32((u32) qp->xrcdn);
1589 if (ibqp->qp_type == IB_QPT_RAW_PACKET)
1590 context->param3 |= cpu_to_be32(1 << 30);
1591 }
1592
1593 if (qp->ibqp.uobject)
1594 context->usr_page = cpu_to_be32(to_mucontext(ibqp->uobject->context)->uar.index);
1595 else
1596 context->usr_page = cpu_to_be32(dev->priv_uar.index);
1597
1598 if (attr_mask & IB_QP_DEST_QPN)
1599 context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
1600
1601 if (attr_mask & IB_QP_PORT) {
1602 if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD &&
1603 !(attr_mask & IB_QP_AV)) {
1604 mlx4_set_sched(&context->pri_path, attr->port_num);
1605 optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE;
1606 }
1607 }
1608
1609 if (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) {
1610 err = create_qp_lb_counter(dev, qp);
1611 if (err)
1612 goto out;
1613
1614 counter_index =
1615 dev->counters_table[qp->port - 1].default_counter;
1616 if (qp->counter_index)
1617 counter_index = qp->counter_index->index;
1618
1619 if (counter_index != -1) {
1620 context->pri_path.counter_index = counter_index;
1621 optpar |= MLX4_QP_OPTPAR_COUNTER_INDEX;
1622 if (qp->counter_index) {
1623 context->pri_path.fl |=
1624 MLX4_FL_ETH_SRC_CHECK_MC_LB;
1625 context->pri_path.vlan_control |=
1626 MLX4_CTRL_ETH_SRC_CHECK_IF_COUNTER;
1627 }
1628 } else
1629 context->pri_path.counter_index =
1630 MLX4_SINK_COUNTER_INDEX(dev->dev);
1631
1632 if (qp->flags & MLX4_IB_QP_NETIF) {
1633 mlx4_ib_steer_qp_reg(dev, qp, 1);
1634 steer_qp = 1;
1635 }
1636 }
1637
1638 if (attr_mask & IB_QP_PKEY_INDEX) {
1639 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1640 context->pri_path.disable_pkey_check = 0x40;
1641 context->pri_path.pkey_index = attr->pkey_index;
1642 optpar |= MLX4_QP_OPTPAR_PKEY_INDEX;
1643 }
1644
1645 if (attr_mask & IB_QP_AV) {
1646 u8 port_num = mlx4_is_bonded(to_mdev(ibqp->device)->dev) ? 1 :
1647 attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1648 union ib_gid gid;
1649 struct ib_gid_attr gid_attr;
1650 u16 vlan = 0xffff;
1651 u8 smac[ETH_ALEN];
1652 int status = 0;
1653
1654 if (rdma_cap_eth_ah(&dev->ib_dev, port_num) &&
1655 attr->ah_attr.ah_flags & IB_AH_GRH) {
1656 int index = attr->ah_attr.grh.sgid_index;
1657
1658 status = ib_get_cached_gid(ibqp->device, port_num,
1659 index, &gid, &gid_attr);
1660 if (!status && !memcmp(&gid, &zgid, sizeof(gid)))
1661 status = -ENOENT;
1662 if (!status && gid_attr.ndev) {
1663 vlan = rdma_vlan_dev_vlan_id(gid_attr.ndev);
1664 memcpy(smac, gid_attr.ndev->dev_addr, ETH_ALEN);
1665 dev_put(gid_attr.ndev);
1666 }
1667 }
1668 if (status)
1669 goto out;
1670
1671 if (mlx4_set_path(dev, attr, attr_mask, qp, &context->pri_path,
1672 port_num, vlan, smac))
1673 goto out;
1674
1675 optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH |
1676 MLX4_QP_OPTPAR_SCHED_QUEUE);
1677 }
1678
1679 if (attr_mask & IB_QP_TIMEOUT) {
1680 context->pri_path.ackto |= attr->timeout << 3;
1681 optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT;
1682 }
1683
1684 if (attr_mask & IB_QP_ALT_PATH) {
1685 if (attr->alt_port_num == 0 ||
1686 attr->alt_port_num > dev->dev->caps.num_ports)
1687 goto out;
1688
1689 if (attr->alt_pkey_index >=
1690 dev->dev->caps.pkey_table_len[attr->alt_port_num])
1691 goto out;
1692
1693 if (mlx4_set_alt_path(dev, attr, attr_mask, qp,
1694 &context->alt_path,
1695 attr->alt_port_num))
1696 goto out;
1697
1698 context->alt_path.pkey_index = attr->alt_pkey_index;
1699 context->alt_path.ackto = attr->alt_timeout << 3;
1700 optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH;
1701 }
1702
1703 pd = get_pd(qp);
1704 get_cqs(qp, &send_cq, &recv_cq);
1705 context->pd = cpu_to_be32(pd->pdn);
1706 context->cqn_send = cpu_to_be32(send_cq->mcq.cqn);
1707 context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn);
1708 context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28);
1709
1710 /* Set "fast registration enabled" for all kernel QPs */
1711 if (!qp->ibqp.uobject)
1712 context->params1 |= cpu_to_be32(1 << 11);
1713
1714 if (attr_mask & IB_QP_RNR_RETRY) {
1715 context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
1716 optpar |= MLX4_QP_OPTPAR_RNR_RETRY;
1717 }
1718
1719 if (attr_mask & IB_QP_RETRY_CNT) {
1720 context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
1721 optpar |= MLX4_QP_OPTPAR_RETRY_COUNT;
1722 }
1723
1724 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1725 if (attr->max_rd_atomic)
1726 context->params1 |=
1727 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
1728 optpar |= MLX4_QP_OPTPAR_SRA_MAX;
1729 }
1730
1731 if (attr_mask & IB_QP_SQ_PSN)
1732 context->next_send_psn = cpu_to_be32(attr->sq_psn);
1733
1734 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1735 if (attr->max_dest_rd_atomic)
1736 context->params2 |=
1737 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
1738 optpar |= MLX4_QP_OPTPAR_RRA_MAX;
1739 }
1740
1741 if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) {
1742 context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask);
1743 optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE;
1744 }
1745
1746 if (ibqp->srq)
1747 context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC);
1748
1749 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
1750 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
1751 optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT;
1752 }
1753 if (attr_mask & IB_QP_RQ_PSN)
1754 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
1755
1756 /* proxy and tunnel qp qkeys will be changed in modify-qp wrappers */
1757 if (attr_mask & IB_QP_QKEY) {
1758 if (qp->mlx4_ib_qp_type &
1759 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))
1760 context->qkey = cpu_to_be32(IB_QP_SET_QKEY);
1761 else {
1762 if (mlx4_is_mfunc(dev->dev) &&
1763 !(qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) &&
1764 (attr->qkey & MLX4_RESERVED_QKEY_MASK) ==
1765 MLX4_RESERVED_QKEY_BASE) {
1766 pr_err("Cannot use reserved QKEY"
1767 " 0x%x (range 0xffff0000..0xffffffff"
1768 " is reserved)\n", attr->qkey);
1769 err = -EINVAL;
1770 goto out;
1771 }
1772 context->qkey = cpu_to_be32(attr->qkey);
1773 }
1774 optpar |= MLX4_QP_OPTPAR_Q_KEY;
1775 }
1776
1777 if (ibqp->srq)
1778 context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn);
1779
1780 if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1781 context->db_rec_addr = cpu_to_be64(qp->db.dma);
1782
1783 if (cur_state == IB_QPS_INIT &&
1784 new_state == IB_QPS_RTR &&
1785 (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
1786 ibqp->qp_type == IB_QPT_UD ||
1787 ibqp->qp_type == IB_QPT_RAW_PACKET)) {
1788 context->pri_path.sched_queue = (qp->port - 1) << 6;
1789 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
1790 qp->mlx4_ib_qp_type &
1791 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) {
1792 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE;
1793 if (qp->mlx4_ib_qp_type != MLX4_IB_QPT_SMI)
1794 context->pri_path.fl = 0x80;
1795 } else {
1796 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1797 context->pri_path.fl = 0x80;
1798 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE;
1799 }
1800 if (rdma_port_get_link_layer(&dev->ib_dev, qp->port) ==
1801 IB_LINK_LAYER_ETHERNET) {
1802 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI ||
1803 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI)
1804 context->pri_path.feup = 1 << 7; /* don't fsm */
1805 /* handle smac_index */
1806 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_UD ||
1807 qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI ||
1808 qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI) {
1809 err = handle_eth_ud_smac_index(dev, qp, context);
1810 if (err) {
1811 err = -EINVAL;
1812 goto out;
1813 }
1814 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI)
1815 dev->qp1_proxy[qp->port - 1] = qp;
1816 }
1817 }
1818 }
1819
1820 if (qp->ibqp.qp_type == IB_QPT_RAW_PACKET) {
1821 context->pri_path.ackto = (context->pri_path.ackto & 0xf8) |
1822 MLX4_IB_LINK_TYPE_ETH;
1823 if (dev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
1824 /* set QP to receive both tunneled & non-tunneled packets */
1825 if (!(context->flags & cpu_to_be32(1 << MLX4_RSS_QPC_FLAG_OFFSET)))
1826 context->srqn = cpu_to_be32(7 << 28);
1827 }
1828 }
1829
1830 if (ibqp->qp_type == IB_QPT_UD && (new_state == IB_QPS_RTR)) {
1831 int is_eth = rdma_port_get_link_layer(
1832 &dev->ib_dev, qp->port) ==
1833 IB_LINK_LAYER_ETHERNET;
1834 if (is_eth) {
1835 context->pri_path.ackto = MLX4_IB_LINK_TYPE_ETH;
1836 optpar |= MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH;
1837 }
1838 }
1839
1840
1841 if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD &&
1842 attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
1843 sqd_event = 1;
1844 else
1845 sqd_event = 0;
1846
1847 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1848 context->rlkey |= (1 << 4);
1849
1850 /*
1851 * Before passing a kernel QP to the HW, make sure that the
1852 * ownership bits of the send queue are set and the SQ
1853 * headroom is stamped so that the hardware doesn't start
1854 * processing stale work requests.
1855 */
1856 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
1857 struct mlx4_wqe_ctrl_seg *ctrl;
1858 int i;
1859
1860 for (i = 0; i < qp->sq.wqe_cnt; ++i) {
1861 ctrl = get_send_wqe(qp, i);
1862 ctrl->owner_opcode = cpu_to_be32(1 << 31);
1863 if (qp->sq_max_wqes_per_wr == 1)
1864 ctrl->fence_size = 1 << (qp->sq.wqe_shift - 4);
1865
1866 stamp_send_wqe(qp, i, 1 << qp->sq.wqe_shift);
1867 }
1868 }
1869
1870 err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state),
1871 to_mlx4_state(new_state), context, optpar,
1872 sqd_event, &qp->mqp);
1873 if (err)
1874 goto out;
1875
1876 qp->state = new_state;
1877
1878 if (attr_mask & IB_QP_ACCESS_FLAGS)
1879 qp->atomic_rd_en = attr->qp_access_flags;
1880 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1881 qp->resp_depth = attr->max_dest_rd_atomic;
1882 if (attr_mask & IB_QP_PORT) {
1883 qp->port = attr->port_num;
1884 update_mcg_macs(dev, qp);
1885 }
1886 if (attr_mask & IB_QP_ALT_PATH)
1887 qp->alt_port = attr->alt_port_num;
1888
1889 if (is_sqp(dev, qp))
1890 store_sqp_attrs(to_msqp(qp), attr, attr_mask);
1891
1892 /*
1893 * If we moved QP0 to RTR, bring the IB link up; if we moved
1894 * QP0 to RESET or ERROR, bring the link back down.
1895 */
1896 if (is_qp0(dev, qp)) {
1897 if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR)
1898 if (mlx4_INIT_PORT(dev->dev, qp->port))
1899 pr_warn("INIT_PORT failed for port %d\n",
1900 qp->port);
1901
1902 if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR &&
1903 (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR))
1904 mlx4_CLOSE_PORT(dev->dev, qp->port);
1905 }
1906
1907 /*
1908 * If we moved a kernel QP to RESET, clean up all old CQ
1909 * entries and reinitialize the QP.
1910 */
1911 if (new_state == IB_QPS_RESET) {
1912 if (!ibqp->uobject) {
1913 mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
1914 ibqp->srq ? to_msrq(ibqp->srq) : NULL);
1915 if (send_cq != recv_cq)
1916 mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1917
1918 qp->rq.head = 0;
1919 qp->rq.tail = 0;
1920 qp->sq.head = 0;
1921 qp->sq.tail = 0;
1922 qp->sq_next_wqe = 0;
1923 if (qp->rq.wqe_cnt)
1924 *qp->db.db = 0;
1925
1926 if (qp->flags & MLX4_IB_QP_NETIF)
1927 mlx4_ib_steer_qp_reg(dev, qp, 0);
1928 }
1929 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) {
1930 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
1931 qp->pri.smac = 0;
1932 qp->pri.smac_port = 0;
1933 }
1934 if (qp->alt.smac) {
1935 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
1936 qp->alt.smac = 0;
1937 }
1938 if (qp->pri.vid < 0x1000) {
1939 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid);
1940 qp->pri.vid = 0xFFFF;
1941 qp->pri.candidate_vid = 0xFFFF;
1942 qp->pri.update_vid = 0;
1943 }
1944
1945 if (qp->alt.vid < 0x1000) {
1946 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid);
1947 qp->alt.vid = 0xFFFF;
1948 qp->alt.candidate_vid = 0xFFFF;
1949 qp->alt.update_vid = 0;
1950 }
1951 }
1952 out:
1953 if (err && qp->counter_index)
1954 mlx4_ib_free_qp_counter(dev, qp);
1955 if (err && steer_qp)
1956 mlx4_ib_steer_qp_reg(dev, qp, 0);
1957 kfree(context);
1958 if (qp->pri.candidate_smac ||
1959 (!qp->pri.candidate_smac && qp->pri.candidate_smac_port)) {
1960 if (err) {
1961 mlx4_unregister_mac(dev->dev, qp->pri.candidate_smac_port, qp->pri.candidate_smac);
1962 } else {
1963 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port))
1964 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
1965 qp->pri.smac = qp->pri.candidate_smac;
1966 qp->pri.smac_index = qp->pri.candidate_smac_index;
1967 qp->pri.smac_port = qp->pri.candidate_smac_port;
1968 }
1969 qp->pri.candidate_smac = 0;
1970 qp->pri.candidate_smac_index = 0;
1971 qp->pri.candidate_smac_port = 0;
1972 }
1973 if (qp->alt.candidate_smac) {
1974 if (err) {
1975 mlx4_unregister_mac(dev->dev, qp->alt.candidate_smac_port, qp->alt.candidate_smac);
1976 } else {
1977 if (qp->alt.smac)
1978 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
1979 qp->alt.smac = qp->alt.candidate_smac;
1980 qp->alt.smac_index = qp->alt.candidate_smac_index;
1981 qp->alt.smac_port = qp->alt.candidate_smac_port;
1982 }
1983 qp->alt.candidate_smac = 0;
1984 qp->alt.candidate_smac_index = 0;
1985 qp->alt.candidate_smac_port = 0;
1986 }
1987
1988 if (qp->pri.update_vid) {
1989 if (err) {
1990 if (qp->pri.candidate_vid < 0x1000)
1991 mlx4_unregister_vlan(dev->dev, qp->pri.candidate_vlan_port,
1992 qp->pri.candidate_vid);
1993 } else {
1994 if (qp->pri.vid < 0x1000)
1995 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port,
1996 qp->pri.vid);
1997 qp->pri.vid = qp->pri.candidate_vid;
1998 qp->pri.vlan_port = qp->pri.candidate_vlan_port;
1999 qp->pri.vlan_index = qp->pri.candidate_vlan_index;
2000 }
2001 qp->pri.candidate_vid = 0xFFFF;
2002 qp->pri.update_vid = 0;
2003 }
2004
2005 if (qp->alt.update_vid) {
2006 if (err) {
2007 if (qp->alt.candidate_vid < 0x1000)
2008 mlx4_unregister_vlan(dev->dev, qp->alt.candidate_vlan_port,
2009 qp->alt.candidate_vid);
2010 } else {
2011 if (qp->alt.vid < 0x1000)
2012 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port,
2013 qp->alt.vid);
2014 qp->alt.vid = qp->alt.candidate_vid;
2015 qp->alt.vlan_port = qp->alt.candidate_vlan_port;
2016 qp->alt.vlan_index = qp->alt.candidate_vlan_index;
2017 }
2018 qp->alt.candidate_vid = 0xFFFF;
2019 qp->alt.update_vid = 0;
2020 }
2021
2022 return err;
2023 }
2024
2025 int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2026 int attr_mask, struct ib_udata *udata)
2027 {
2028 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
2029 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2030 enum ib_qp_state cur_state, new_state;
2031 int err = -EINVAL;
2032 int ll;
2033 mutex_lock(&qp->mutex);
2034
2035 cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
2036 new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
2037
2038 if (cur_state == new_state && cur_state == IB_QPS_RESET) {
2039 ll = IB_LINK_LAYER_UNSPECIFIED;
2040 } else {
2041 int port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
2042 ll = rdma_port_get_link_layer(&dev->ib_dev, port);
2043 }
2044
2045 if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
2046 attr_mask, ll)) {
2047 pr_debug("qpn 0x%x: invalid attribute mask specified "
2048 "for transition %d to %d. qp_type %d,"
2049 " attr_mask 0x%x\n",
2050 ibqp->qp_num, cur_state, new_state,
2051 ibqp->qp_type, attr_mask);
2052 goto out;
2053 }
2054
2055 if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT)) {
2056 if ((cur_state == IB_QPS_RESET) && (new_state == IB_QPS_INIT)) {
2057 if ((ibqp->qp_type == IB_QPT_RC) ||
2058 (ibqp->qp_type == IB_QPT_UD) ||
2059 (ibqp->qp_type == IB_QPT_UC) ||
2060 (ibqp->qp_type == IB_QPT_RAW_PACKET) ||
2061 (ibqp->qp_type == IB_QPT_XRC_INI)) {
2062 attr->port_num = mlx4_ib_bond_next_port(dev);
2063 }
2064 } else {
2065 /* no sense in changing port_num
2066 * when ports are bonded */
2067 attr_mask &= ~IB_QP_PORT;
2068 }
2069 }
2070
2071 if ((attr_mask & IB_QP_PORT) &&
2072 (attr->port_num == 0 || attr->port_num > dev->num_ports)) {
2073 pr_debug("qpn 0x%x: invalid port number (%d) specified "
2074 "for transition %d to %d. qp_type %d\n",
2075 ibqp->qp_num, attr->port_num, cur_state,
2076 new_state, ibqp->qp_type);
2077 goto out;
2078 }
2079
2080 if ((attr_mask & IB_QP_PORT) && (ibqp->qp_type == IB_QPT_RAW_PACKET) &&
2081 (rdma_port_get_link_layer(&dev->ib_dev, attr->port_num) !=
2082 IB_LINK_LAYER_ETHERNET))
2083 goto out;
2084
2085 if (attr_mask & IB_QP_PKEY_INDEX) {
2086 int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
2087 if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) {
2088 pr_debug("qpn 0x%x: invalid pkey index (%d) specified "
2089 "for transition %d to %d. qp_type %d\n",
2090 ibqp->qp_num, attr->pkey_index, cur_state,
2091 new_state, ibqp->qp_type);
2092 goto out;
2093 }
2094 }
2095
2096 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
2097 attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) {
2098 pr_debug("qpn 0x%x: max_rd_atomic (%d) too large. "
2099 "Transition %d to %d. qp_type %d\n",
2100 ibqp->qp_num, attr->max_rd_atomic, cur_state,
2101 new_state, ibqp->qp_type);
2102 goto out;
2103 }
2104
2105 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
2106 attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) {
2107 pr_debug("qpn 0x%x: max_dest_rd_atomic (%d) too large. "
2108 "Transition %d to %d. qp_type %d\n",
2109 ibqp->qp_num, attr->max_dest_rd_atomic, cur_state,
2110 new_state, ibqp->qp_type);
2111 goto out;
2112 }
2113
2114 if (cur_state == new_state && cur_state == IB_QPS_RESET) {
2115 err = 0;
2116 goto out;
2117 }
2118
2119 err = __mlx4_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state);
2120
2121 if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT))
2122 attr->port_num = 1;
2123
2124 out:
2125 mutex_unlock(&qp->mutex);
2126 return err;
2127 }
2128
2129 static int vf_get_qp0_qkey(struct mlx4_dev *dev, int qpn, u32 *qkey)
2130 {
2131 int i;
2132 for (i = 0; i < dev->caps.num_ports; i++) {
2133 if (qpn == dev->caps.qp0_proxy[i] ||
2134 qpn == dev->caps.qp0_tunnel[i]) {
2135 *qkey = dev->caps.qp0_qkey[i];
2136 return 0;
2137 }
2138 }
2139 return -EINVAL;
2140 }
2141
2142 static int build_sriov_qp0_header(struct mlx4_ib_sqp *sqp,
2143 struct ib_ud_wr *wr,
2144 void *wqe, unsigned *mlx_seg_len)
2145 {
2146 struct mlx4_ib_dev *mdev = to_mdev(sqp->qp.ibqp.device);
2147 struct ib_device *ib_dev = &mdev->ib_dev;
2148 struct mlx4_wqe_mlx_seg *mlx = wqe;
2149 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
2150 struct mlx4_ib_ah *ah = to_mah(wr->ah);
2151 u16 pkey;
2152 u32 qkey;
2153 int send_size;
2154 int header_size;
2155 int spc;
2156 int i;
2157
2158 if (wr->wr.opcode != IB_WR_SEND)
2159 return -EINVAL;
2160
2161 send_size = 0;
2162
2163 for (i = 0; i < wr->wr.num_sge; ++i)
2164 send_size += wr->wr.sg_list[i].length;
2165
2166 /* for proxy-qp0 sends, need to add in size of tunnel header */
2167 /* for tunnel-qp0 sends, tunnel header is already in s/g list */
2168 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER)
2169 send_size += sizeof (struct mlx4_ib_tunnel_header);
2170
2171 ib_ud_header_init(send_size, 1, 0, 0, 0, 0, &sqp->ud_header);
2172
2173 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) {
2174 sqp->ud_header.lrh.service_level =
2175 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
2176 sqp->ud_header.lrh.destination_lid =
2177 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2178 sqp->ud_header.lrh.source_lid =
2179 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2180 }
2181
2182 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
2183
2184 /* force loopback */
2185 mlx->flags |= cpu_to_be32(MLX4_WQE_MLX_VL15 | 0x1 | MLX4_WQE_MLX_SLR);
2186 mlx->rlid = sqp->ud_header.lrh.destination_lid;
2187
2188 sqp->ud_header.lrh.virtual_lane = 0;
2189 sqp->ud_header.bth.solicited_event = !!(wr->wr.send_flags & IB_SEND_SOLICITED);
2190 ib_get_cached_pkey(ib_dev, sqp->qp.port, 0, &pkey);
2191 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
2192 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_TUN_SMI_OWNER)
2193 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->remote_qpn);
2194 else
2195 sqp->ud_header.bth.destination_qpn =
2196 cpu_to_be32(mdev->dev->caps.qp0_tunnel[sqp->qp.port - 1]);
2197
2198 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
2199 if (mlx4_is_master(mdev->dev)) {
2200 if (mlx4_get_parav_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
2201 return -EINVAL;
2202 } else {
2203 if (vf_get_qp0_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
2204 return -EINVAL;
2205 }
2206 sqp->ud_header.deth.qkey = cpu_to_be32(qkey);
2207 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.mqp.qpn);
2208
2209 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
2210 sqp->ud_header.immediate_present = 0;
2211
2212 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
2213
2214 /*
2215 * Inline data segments may not cross a 64 byte boundary. If
2216 * our UD header is bigger than the space available up to the
2217 * next 64 byte boundary in the WQE, use two inline data
2218 * segments to hold the UD header.
2219 */
2220 spc = MLX4_INLINE_ALIGN -
2221 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2222 if (header_size <= spc) {
2223 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
2224 memcpy(inl + 1, sqp->header_buf, header_size);
2225 i = 1;
2226 } else {
2227 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2228 memcpy(inl + 1, sqp->header_buf, spc);
2229
2230 inl = (void *) (inl + 1) + spc;
2231 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
2232 /*
2233 * Need a barrier here to make sure all the data is
2234 * visible before the byte_count field is set.
2235 * Otherwise the HCA prefetcher could grab the 64-byte
2236 * chunk with this inline segment and get a valid (!=
2237 * 0xffffffff) byte count but stale data, and end up
2238 * generating a packet with bad headers.
2239 *
2240 * The first inline segment's byte_count field doesn't
2241 * need a barrier, because it comes after a
2242 * control/MLX segment and therefore is at an offset
2243 * of 16 mod 64.
2244 */
2245 wmb();
2246 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
2247 i = 2;
2248 }
2249
2250 *mlx_seg_len =
2251 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
2252 return 0;
2253 }
2254
2255 static void mlx4_u64_to_smac(u8 *dst_mac, u64 src_mac)
2256 {
2257 int i;
2258
2259 for (i = ETH_ALEN; i; i--) {
2260 dst_mac[i - 1] = src_mac & 0xff;
2261 src_mac >>= 8;
2262 }
2263 }
2264
2265 static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_ud_wr *wr,
2266 void *wqe, unsigned *mlx_seg_len)
2267 {
2268 struct ib_device *ib_dev = sqp->qp.ibqp.device;
2269 struct mlx4_wqe_mlx_seg *mlx = wqe;
2270 struct mlx4_wqe_ctrl_seg *ctrl = wqe;
2271 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
2272 struct mlx4_ib_ah *ah = to_mah(wr->ah);
2273 union ib_gid sgid;
2274 u16 pkey;
2275 int send_size;
2276 int header_size;
2277 int spc;
2278 int i;
2279 int err = 0;
2280 u16 vlan = 0xffff;
2281 bool is_eth;
2282 bool is_vlan = false;
2283 bool is_grh;
2284
2285 send_size = 0;
2286 for (i = 0; i < wr->wr.num_sge; ++i)
2287 send_size += wr->wr.sg_list[i].length;
2288
2289 is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET;
2290 is_grh = mlx4_ib_ah_grh_present(ah);
2291 if (is_eth) {
2292 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2293 /* When multi-function is enabled, the ib_core gid
2294 * indexes don't necessarily match the hw ones, so
2295 * we must use our own cache */
2296 err = mlx4_get_roce_gid_from_slave(to_mdev(ib_dev)->dev,
2297 be32_to_cpu(ah->av.ib.port_pd) >> 24,
2298 ah->av.ib.gid_index, &sgid.raw[0]);
2299 if (err)
2300 return err;
2301 } else {
2302 err = ib_get_cached_gid(ib_dev,
2303 be32_to_cpu(ah->av.ib.port_pd) >> 24,
2304 ah->av.ib.gid_index, &sgid,
2305 NULL);
2306 if (!err && !memcmp(&sgid, &zgid, sizeof(sgid)))
2307 err = -ENOENT;
2308 if (err)
2309 return err;
2310 }
2311
2312 if (ah->av.eth.vlan != cpu_to_be16(0xffff)) {
2313 vlan = be16_to_cpu(ah->av.eth.vlan) & 0x0fff;
2314 is_vlan = 1;
2315 }
2316 }
2317 ib_ud_header_init(send_size, !is_eth, is_eth, is_vlan, is_grh, 0, &sqp->ud_header);
2318
2319 if (!is_eth) {
2320 sqp->ud_header.lrh.service_level =
2321 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
2322 sqp->ud_header.lrh.destination_lid = ah->av.ib.dlid;
2323 sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2324 }
2325
2326 if (is_grh) {
2327 sqp->ud_header.grh.traffic_class =
2328 (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff;
2329 sqp->ud_header.grh.flow_label =
2330 ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
2331 sqp->ud_header.grh.hop_limit = ah->av.ib.hop_limit;
2332 if (is_eth)
2333 memcpy(sqp->ud_header.grh.source_gid.raw, sgid.raw, 16);
2334 else {
2335 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2336 /* When multi-function is enabled, the ib_core gid
2337 * indexes don't necessarily match the hw ones, so
2338 * we must use our own cache */
2339 sqp->ud_header.grh.source_gid.global.subnet_prefix =
2340 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
2341 subnet_prefix;
2342 sqp->ud_header.grh.source_gid.global.interface_id =
2343 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
2344 guid_cache[ah->av.ib.gid_index];
2345 } else
2346 ib_get_cached_gid(ib_dev,
2347 be32_to_cpu(ah->av.ib.port_pd) >> 24,
2348 ah->av.ib.gid_index,
2349 &sqp->ud_header.grh.source_gid, NULL);
2350 }
2351 memcpy(sqp->ud_header.grh.destination_gid.raw,
2352 ah->av.ib.dgid, 16);
2353 }
2354
2355 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
2356
2357 if (!is_eth) {
2358 mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) |
2359 (sqp->ud_header.lrh.destination_lid ==
2360 IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) |
2361 (sqp->ud_header.lrh.service_level << 8));
2362 if (ah->av.ib.port_pd & cpu_to_be32(0x80000000))
2363 mlx->flags |= cpu_to_be32(0x1); /* force loopback */
2364 mlx->rlid = sqp->ud_header.lrh.destination_lid;
2365 }
2366
2367 switch (wr->wr.opcode) {
2368 case IB_WR_SEND:
2369 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
2370 sqp->ud_header.immediate_present = 0;
2371 break;
2372 case IB_WR_SEND_WITH_IMM:
2373 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
2374 sqp->ud_header.immediate_present = 1;
2375 sqp->ud_header.immediate_data = wr->wr.ex.imm_data;
2376 break;
2377 default:
2378 return -EINVAL;
2379 }
2380
2381 if (is_eth) {
2382 struct in6_addr in6;
2383
2384 u16 pcp = (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 29) << 13;
2385
2386 mlx->sched_prio = cpu_to_be16(pcp);
2387
2388 memcpy(sqp->ud_header.eth.dmac_h, ah->av.eth.mac, 6);
2389 /* FIXME: cache smac value? */
2390 memcpy(&ctrl->srcrb_flags16[0], ah->av.eth.mac, 2);
2391 memcpy(&ctrl->imm, ah->av.eth.mac + 2, 4);
2392 memcpy(&in6, sgid.raw, sizeof(in6));
2393
2394 if (!mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2395 u64 mac = atomic64_read(&to_mdev(ib_dev)->iboe.mac[sqp->qp.port - 1]);
2396 u8 smac[ETH_ALEN];
2397
2398 mlx4_u64_to_smac(smac, mac);
2399 memcpy(sqp->ud_header.eth.smac_h, smac, ETH_ALEN);
2400 } else {
2401 /* use the src mac of the tunnel */
2402 memcpy(sqp->ud_header.eth.smac_h, ah->av.eth.s_mac, ETH_ALEN);
2403 }
2404
2405 if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6))
2406 mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
2407 if (!is_vlan) {
2408 sqp->ud_header.eth.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
2409 } else {
2410 sqp->ud_header.vlan.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
2411 sqp->ud_header.vlan.tag = cpu_to_be16(vlan | pcp);
2412 }
2413 } else {
2414 sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0;
2415 if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
2416 sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
2417 }
2418 sqp->ud_header.bth.solicited_event = !!(wr->wr.send_flags & IB_SEND_SOLICITED);
2419 if (!sqp->qp.ibqp.qp_num)
2420 ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey);
2421 else
2422 ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->pkey_index, &pkey);
2423 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
2424 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->remote_qpn);
2425 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
2426 sqp->ud_header.deth.qkey = cpu_to_be32(wr->remote_qkey & 0x80000000 ?
2427 sqp->qkey : wr->remote_qkey);
2428 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
2429
2430 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
2431
2432 if (0) {
2433 pr_err("built UD header of size %d:\n", header_size);
2434 for (i = 0; i < header_size / 4; ++i) {
2435 if (i % 8 == 0)
2436 pr_err(" [%02x] ", i * 4);
2437 pr_cont(" %08x",
2438 be32_to_cpu(((__be32 *) sqp->header_buf)[i]));
2439 if ((i + 1) % 8 == 0)
2440 pr_cont("\n");
2441 }
2442 pr_err("\n");
2443 }
2444
2445 /*
2446 * Inline data segments may not cross a 64 byte boundary. If
2447 * our UD header is bigger than the space available up to the
2448 * next 64 byte boundary in the WQE, use two inline data
2449 * segments to hold the UD header.
2450 */
2451 spc = MLX4_INLINE_ALIGN -
2452 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2453 if (header_size <= spc) {
2454 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
2455 memcpy(inl + 1, sqp->header_buf, header_size);
2456 i = 1;
2457 } else {
2458 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2459 memcpy(inl + 1, sqp->header_buf, spc);
2460
2461 inl = (void *) (inl + 1) + spc;
2462 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
2463 /*
2464 * Need a barrier here to make sure all the data is
2465 * visible before the byte_count field is set.
2466 * Otherwise the HCA prefetcher could grab the 64-byte
2467 * chunk with this inline segment and get a valid (!=
2468 * 0xffffffff) byte count but stale data, and end up
2469 * generating a packet with bad headers.
2470 *
2471 * The first inline segment's byte_count field doesn't
2472 * need a barrier, because it comes after a
2473 * control/MLX segment and therefore is at an offset
2474 * of 16 mod 64.
2475 */
2476 wmb();
2477 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
2478 i = 2;
2479 }
2480
2481 *mlx_seg_len =
2482 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
2483 return 0;
2484 }
2485
2486 static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
2487 {
2488 unsigned cur;
2489 struct mlx4_ib_cq *cq;
2490
2491 cur = wq->head - wq->tail;
2492 if (likely(cur + nreq < wq->max_post))
2493 return 0;
2494
2495 cq = to_mcq(ib_cq);
2496 spin_lock(&cq->lock);
2497 cur = wq->head - wq->tail;
2498 spin_unlock(&cq->lock);
2499
2500 return cur + nreq >= wq->max_post;
2501 }
2502
2503 static __be32 convert_access(int acc)
2504 {
2505 return (acc & IB_ACCESS_REMOTE_ATOMIC ?
2506 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC) : 0) |
2507 (acc & IB_ACCESS_REMOTE_WRITE ?
2508 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE) : 0) |
2509 (acc & IB_ACCESS_REMOTE_READ ?
2510 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ) : 0) |
2511 (acc & IB_ACCESS_LOCAL_WRITE ? cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_WRITE) : 0) |
2512 cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_READ);
2513 }
2514
2515 static void set_reg_seg(struct mlx4_wqe_fmr_seg *fseg,
2516 struct ib_reg_wr *wr)
2517 {
2518 struct mlx4_ib_mr *mr = to_mmr(wr->mr);
2519
2520 fseg->flags = convert_access(wr->access);
2521 fseg->mem_key = cpu_to_be32(wr->key);
2522 fseg->buf_list = cpu_to_be64(mr->page_map);
2523 fseg->start_addr = cpu_to_be64(mr->ibmr.iova);
2524 fseg->reg_len = cpu_to_be64(mr->ibmr.length);
2525 fseg->offset = 0; /* XXX -- is this just for ZBVA? */
2526 fseg->page_size = cpu_to_be32(ilog2(mr->ibmr.page_size));
2527 fseg->reserved[0] = 0;
2528 fseg->reserved[1] = 0;
2529 }
2530
2531 static void set_bind_seg(struct mlx4_wqe_bind_seg *bseg,
2532 struct ib_bind_mw_wr *wr)
2533 {
2534 bseg->flags1 =
2535 convert_access(wr->bind_info.mw_access_flags) &
2536 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ |
2537 MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE |
2538 MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC);
2539 bseg->flags2 = 0;
2540 if (wr->mw->type == IB_MW_TYPE_2)
2541 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_TYPE_2);
2542 if (wr->bind_info.mw_access_flags & IB_ZERO_BASED)
2543 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_ZERO_BASED);
2544 bseg->new_rkey = cpu_to_be32(wr->rkey);
2545 bseg->lkey = cpu_to_be32(wr->bind_info.mr->lkey);
2546 bseg->addr = cpu_to_be64(wr->bind_info.addr);
2547 bseg->length = cpu_to_be64(wr->bind_info.length);
2548 }
2549
2550 static void set_local_inv_seg(struct mlx4_wqe_local_inval_seg *iseg, u32 rkey)
2551 {
2552 memset(iseg, 0, sizeof(*iseg));
2553 iseg->mem_key = cpu_to_be32(rkey);
2554 }
2555
2556 static __always_inline void set_raddr_seg(struct mlx4_wqe_raddr_seg *rseg,
2557 u64 remote_addr, u32 rkey)
2558 {
2559 rseg->raddr = cpu_to_be64(remote_addr);
2560 rseg->rkey = cpu_to_be32(rkey);
2561 rseg->reserved = 0;
2562 }
2563
2564 static void set_atomic_seg(struct mlx4_wqe_atomic_seg *aseg,
2565 struct ib_atomic_wr *wr)
2566 {
2567 if (wr->wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
2568 aseg->swap_add = cpu_to_be64(wr->swap);
2569 aseg->compare = cpu_to_be64(wr->compare_add);
2570 } else if (wr->wr.opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) {
2571 aseg->swap_add = cpu_to_be64(wr->compare_add);
2572 aseg->compare = cpu_to_be64(wr->compare_add_mask);
2573 } else {
2574 aseg->swap_add = cpu_to_be64(wr->compare_add);
2575 aseg->compare = 0;
2576 }
2577
2578 }
2579
2580 static void set_masked_atomic_seg(struct mlx4_wqe_masked_atomic_seg *aseg,
2581 struct ib_atomic_wr *wr)
2582 {
2583 aseg->swap_add = cpu_to_be64(wr->swap);
2584 aseg->swap_add_mask = cpu_to_be64(wr->swap_mask);
2585 aseg->compare = cpu_to_be64(wr->compare_add);
2586 aseg->compare_mask = cpu_to_be64(wr->compare_add_mask);
2587 }
2588
2589 static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg,
2590 struct ib_ud_wr *wr)
2591 {
2592 memcpy(dseg->av, &to_mah(wr->ah)->av, sizeof (struct mlx4_av));
2593 dseg->dqpn = cpu_to_be32(wr->remote_qpn);
2594 dseg->qkey = cpu_to_be32(wr->remote_qkey);
2595 dseg->vlan = to_mah(wr->ah)->av.eth.vlan;
2596 memcpy(dseg->mac, to_mah(wr->ah)->av.eth.mac, 6);
2597 }
2598
2599 static void set_tunnel_datagram_seg(struct mlx4_ib_dev *dev,
2600 struct mlx4_wqe_datagram_seg *dseg,
2601 struct ib_ud_wr *wr,
2602 enum mlx4_ib_qp_type qpt)
2603 {
2604 union mlx4_ext_av *av = &to_mah(wr->ah)->av;
2605 struct mlx4_av sqp_av = {0};
2606 int port = *((u8 *) &av->ib.port_pd) & 0x3;
2607
2608 /* force loopback */
2609 sqp_av.port_pd = av->ib.port_pd | cpu_to_be32(0x80000000);
2610 sqp_av.g_slid = av->ib.g_slid & 0x7f; /* no GRH */
2611 sqp_av.sl_tclass_flowlabel = av->ib.sl_tclass_flowlabel &
2612 cpu_to_be32(0xf0000000);
2613
2614 memcpy(dseg->av, &sqp_av, sizeof (struct mlx4_av));
2615 if (qpt == MLX4_IB_QPT_PROXY_GSI)
2616 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp1_tunnel[port - 1]);
2617 else
2618 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp0_tunnel[port - 1]);
2619 /* Use QKEY from the QP context, which is set by master */
2620 dseg->qkey = cpu_to_be32(IB_QP_SET_QKEY);
2621 }
2622
2623 static void build_tunnel_header(struct ib_ud_wr *wr, void *wqe, unsigned *mlx_seg_len)
2624 {
2625 struct mlx4_wqe_inline_seg *inl = wqe;
2626 struct mlx4_ib_tunnel_header hdr;
2627 struct mlx4_ib_ah *ah = to_mah(wr->ah);
2628 int spc;
2629 int i;
2630
2631 memcpy(&hdr.av, &ah->av, sizeof hdr.av);
2632 hdr.remote_qpn = cpu_to_be32(wr->remote_qpn);
2633 hdr.pkey_index = cpu_to_be16(wr->pkey_index);
2634 hdr.qkey = cpu_to_be32(wr->remote_qkey);
2635 memcpy(hdr.mac, ah->av.eth.mac, 6);
2636 hdr.vlan = ah->av.eth.vlan;
2637
2638 spc = MLX4_INLINE_ALIGN -
2639 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2640 if (sizeof (hdr) <= spc) {
2641 memcpy(inl + 1, &hdr, sizeof (hdr));
2642 wmb();
2643 inl->byte_count = cpu_to_be32(1 << 31 | sizeof (hdr));
2644 i = 1;
2645 } else {
2646 memcpy(inl + 1, &hdr, spc);
2647 wmb();
2648 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2649
2650 inl = (void *) (inl + 1) + spc;
2651 memcpy(inl + 1, (void *) &hdr + spc, sizeof (hdr) - spc);
2652 wmb();
2653 inl->byte_count = cpu_to_be32(1 << 31 | (sizeof (hdr) - spc));
2654 i = 2;
2655 }
2656
2657 *mlx_seg_len =
2658 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + sizeof (hdr), 16);
2659 }
2660
2661 static void set_mlx_icrc_seg(void *dseg)
2662 {
2663 u32 *t = dseg;
2664 struct mlx4_wqe_inline_seg *iseg = dseg;
2665
2666 t[1] = 0;
2667
2668 /*
2669 * Need a barrier here before writing the byte_count field to
2670 * make sure that all the data is visible before the
2671 * byte_count field is set. Otherwise, if the segment begins
2672 * a new cacheline, the HCA prefetcher could grab the 64-byte
2673 * chunk and get a valid (!= * 0xffffffff) byte count but
2674 * stale data, and end up sending the wrong data.
2675 */
2676 wmb();
2677
2678 iseg->byte_count = cpu_to_be32((1 << 31) | 4);
2679 }
2680
2681 static void set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2682 {
2683 dseg->lkey = cpu_to_be32(sg->lkey);
2684 dseg->addr = cpu_to_be64(sg->addr);
2685
2686 /*
2687 * Need a barrier here before writing the byte_count field to
2688 * make sure that all the data is visible before the
2689 * byte_count field is set. Otherwise, if the segment begins
2690 * a new cacheline, the HCA prefetcher could grab the 64-byte
2691 * chunk and get a valid (!= * 0xffffffff) byte count but
2692 * stale data, and end up sending the wrong data.
2693 */
2694 wmb();
2695
2696 dseg->byte_count = cpu_to_be32(sg->length);
2697 }
2698
2699 static void __set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2700 {
2701 dseg->byte_count = cpu_to_be32(sg->length);
2702 dseg->lkey = cpu_to_be32(sg->lkey);
2703 dseg->addr = cpu_to_be64(sg->addr);
2704 }
2705
2706 static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe, struct ib_ud_wr *wr,
2707 struct mlx4_ib_qp *qp, unsigned *lso_seg_len,
2708 __be32 *lso_hdr_sz, __be32 *blh)
2709 {
2710 unsigned halign = ALIGN(sizeof *wqe + wr->hlen, 16);
2711
2712 if (unlikely(halign > MLX4_IB_CACHE_LINE_SIZE))
2713 *blh = cpu_to_be32(1 << 6);
2714
2715 if (unlikely(!(qp->flags & MLX4_IB_QP_LSO) &&
2716 wr->wr.num_sge > qp->sq.max_gs - (halign >> 4)))
2717 return -EINVAL;
2718
2719 memcpy(wqe->header, wr->header, wr->hlen);
2720
2721 *lso_hdr_sz = cpu_to_be32(wr->mss << 16 | wr->hlen);
2722 *lso_seg_len = halign;
2723 return 0;
2724 }
2725
2726 static __be32 send_ieth(struct ib_send_wr *wr)
2727 {
2728 switch (wr->opcode) {
2729 case IB_WR_SEND_WITH_IMM:
2730 case IB_WR_RDMA_WRITE_WITH_IMM:
2731 return wr->ex.imm_data;
2732
2733 case IB_WR_SEND_WITH_INV:
2734 return cpu_to_be32(wr->ex.invalidate_rkey);
2735
2736 default:
2737 return 0;
2738 }
2739 }
2740
2741 static void add_zero_len_inline(void *wqe)
2742 {
2743 struct mlx4_wqe_inline_seg *inl = wqe;
2744 memset(wqe, 0, 16);
2745 inl->byte_count = cpu_to_be32(1 << 31);
2746 }
2747
2748 int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
2749 struct ib_send_wr **bad_wr)
2750 {
2751 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2752 void *wqe;
2753 struct mlx4_wqe_ctrl_seg *ctrl;
2754 struct mlx4_wqe_data_seg *dseg;
2755 unsigned long flags;
2756 int nreq;
2757 int err = 0;
2758 unsigned ind;
2759 int uninitialized_var(stamp);
2760 int uninitialized_var(size);
2761 unsigned uninitialized_var(seglen);
2762 __be32 dummy;
2763 __be32 *lso_wqe;
2764 __be32 uninitialized_var(lso_hdr_sz);
2765 __be32 blh;
2766 int i;
2767 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
2768
2769 spin_lock_irqsave(&qp->sq.lock, flags);
2770 if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) {
2771 err = -EIO;
2772 *bad_wr = wr;
2773 nreq = 0;
2774 goto out;
2775 }
2776
2777 ind = qp->sq_next_wqe;
2778
2779 for (nreq = 0; wr; ++nreq, wr = wr->next) {
2780 lso_wqe = &dummy;
2781 blh = 0;
2782
2783 if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
2784 err = -ENOMEM;
2785 *bad_wr = wr;
2786 goto out;
2787 }
2788
2789 if (unlikely(wr->num_sge > qp->sq.max_gs)) {
2790 err = -EINVAL;
2791 *bad_wr = wr;
2792 goto out;
2793 }
2794
2795 ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
2796 qp->sq.wrid[(qp->sq.head + nreq) & (qp->sq.wqe_cnt - 1)] = wr->wr_id;
2797
2798 ctrl->srcrb_flags =
2799 (wr->send_flags & IB_SEND_SIGNALED ?
2800 cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) |
2801 (wr->send_flags & IB_SEND_SOLICITED ?
2802 cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) |
2803 ((wr->send_flags & IB_SEND_IP_CSUM) ?
2804 cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
2805 MLX4_WQE_CTRL_TCP_UDP_CSUM) : 0) |
2806 qp->sq_signal_bits;
2807
2808 ctrl->imm = send_ieth(wr);
2809
2810 wqe += sizeof *ctrl;
2811 size = sizeof *ctrl / 16;
2812
2813 switch (qp->mlx4_ib_qp_type) {
2814 case MLX4_IB_QPT_RC:
2815 case MLX4_IB_QPT_UC:
2816 switch (wr->opcode) {
2817 case IB_WR_ATOMIC_CMP_AND_SWP:
2818 case IB_WR_ATOMIC_FETCH_AND_ADD:
2819 case IB_WR_MASKED_ATOMIC_FETCH_AND_ADD:
2820 set_raddr_seg(wqe, atomic_wr(wr)->remote_addr,
2821 atomic_wr(wr)->rkey);
2822 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2823
2824 set_atomic_seg(wqe, atomic_wr(wr));
2825 wqe += sizeof (struct mlx4_wqe_atomic_seg);
2826
2827 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2828 sizeof (struct mlx4_wqe_atomic_seg)) / 16;
2829
2830 break;
2831
2832 case IB_WR_MASKED_ATOMIC_CMP_AND_SWP:
2833 set_raddr_seg(wqe, atomic_wr(wr)->remote_addr,
2834 atomic_wr(wr)->rkey);
2835 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2836
2837 set_masked_atomic_seg(wqe, atomic_wr(wr));
2838 wqe += sizeof (struct mlx4_wqe_masked_atomic_seg);
2839
2840 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2841 sizeof (struct mlx4_wqe_masked_atomic_seg)) / 16;
2842
2843 break;
2844
2845 case IB_WR_RDMA_READ:
2846 case IB_WR_RDMA_WRITE:
2847 case IB_WR_RDMA_WRITE_WITH_IMM:
2848 set_raddr_seg(wqe, rdma_wr(wr)->remote_addr,
2849 rdma_wr(wr)->rkey);
2850 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2851 size += sizeof (struct mlx4_wqe_raddr_seg) / 16;
2852 break;
2853
2854 case IB_WR_LOCAL_INV:
2855 ctrl->srcrb_flags |=
2856 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2857 set_local_inv_seg(wqe, wr->ex.invalidate_rkey);
2858 wqe += sizeof (struct mlx4_wqe_local_inval_seg);
2859 size += sizeof (struct mlx4_wqe_local_inval_seg) / 16;
2860 break;
2861
2862 case IB_WR_REG_MR:
2863 ctrl->srcrb_flags |=
2864 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2865 set_reg_seg(wqe, reg_wr(wr));
2866 wqe += sizeof(struct mlx4_wqe_fmr_seg);
2867 size += sizeof(struct mlx4_wqe_fmr_seg) / 16;
2868 break;
2869
2870 case IB_WR_BIND_MW:
2871 ctrl->srcrb_flags |=
2872 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2873 set_bind_seg(wqe, bind_mw_wr(wr));
2874 wqe += sizeof(struct mlx4_wqe_bind_seg);
2875 size += sizeof(struct mlx4_wqe_bind_seg) / 16;
2876 break;
2877 default:
2878 /* No extra segments required for sends */
2879 break;
2880 }
2881 break;
2882
2883 case MLX4_IB_QPT_TUN_SMI_OWNER:
2884 err = build_sriov_qp0_header(to_msqp(qp), ud_wr(wr),
2885 ctrl, &seglen);
2886 if (unlikely(err)) {
2887 *bad_wr = wr;
2888 goto out;
2889 }
2890 wqe += seglen;
2891 size += seglen / 16;
2892 break;
2893 case MLX4_IB_QPT_TUN_SMI:
2894 case MLX4_IB_QPT_TUN_GSI:
2895 /* this is a UD qp used in MAD responses to slaves. */
2896 set_datagram_seg(wqe, ud_wr(wr));
2897 /* set the forced-loopback bit in the data seg av */
2898 *(__be32 *) wqe |= cpu_to_be32(0x80000000);
2899 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2900 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2901 break;
2902 case MLX4_IB_QPT_UD:
2903 set_datagram_seg(wqe, ud_wr(wr));
2904 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2905 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2906
2907 if (wr->opcode == IB_WR_LSO) {
2908 err = build_lso_seg(wqe, ud_wr(wr), qp, &seglen,
2909 &lso_hdr_sz, &blh);
2910 if (unlikely(err)) {
2911 *bad_wr = wr;
2912 goto out;
2913 }
2914 lso_wqe = (__be32 *) wqe;
2915 wqe += seglen;
2916 size += seglen / 16;
2917 }
2918 break;
2919
2920 case MLX4_IB_QPT_PROXY_SMI_OWNER:
2921 err = build_sriov_qp0_header(to_msqp(qp), ud_wr(wr),
2922 ctrl, &seglen);
2923 if (unlikely(err)) {
2924 *bad_wr = wr;
2925 goto out;
2926 }
2927 wqe += seglen;
2928 size += seglen / 16;
2929 /* to start tunnel header on a cache-line boundary */
2930 add_zero_len_inline(wqe);
2931 wqe += 16;
2932 size++;
2933 build_tunnel_header(ud_wr(wr), wqe, &seglen);
2934 wqe += seglen;
2935 size += seglen / 16;
2936 break;
2937 case MLX4_IB_QPT_PROXY_SMI:
2938 case MLX4_IB_QPT_PROXY_GSI:
2939 /* If we are tunneling special qps, this is a UD qp.
2940 * In this case we first add a UD segment targeting
2941 * the tunnel qp, and then add a header with address
2942 * information */
2943 set_tunnel_datagram_seg(to_mdev(ibqp->device), wqe,
2944 ud_wr(wr),
2945 qp->mlx4_ib_qp_type);
2946 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2947 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2948 build_tunnel_header(ud_wr(wr), wqe, &seglen);
2949 wqe += seglen;
2950 size += seglen / 16;
2951 break;
2952
2953 case MLX4_IB_QPT_SMI:
2954 case MLX4_IB_QPT_GSI:
2955 err = build_mlx_header(to_msqp(qp), ud_wr(wr), ctrl,
2956 &seglen);
2957 if (unlikely(err)) {
2958 *bad_wr = wr;
2959 goto out;
2960 }
2961 wqe += seglen;
2962 size += seglen / 16;
2963 break;
2964
2965 default:
2966 break;
2967 }
2968
2969 /*
2970 * Write data segments in reverse order, so as to
2971 * overwrite cacheline stamp last within each
2972 * cacheline. This avoids issues with WQE
2973 * prefetching.
2974 */
2975
2976 dseg = wqe;
2977 dseg += wr->num_sge - 1;
2978 size += wr->num_sge * (sizeof (struct mlx4_wqe_data_seg) / 16);
2979
2980 /* Add one more inline data segment for ICRC for MLX sends */
2981 if (unlikely(qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
2982 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI ||
2983 qp->mlx4_ib_qp_type &
2984 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))) {
2985 set_mlx_icrc_seg(dseg + 1);
2986 size += sizeof (struct mlx4_wqe_data_seg) / 16;
2987 }
2988
2989 for (i = wr->num_sge - 1; i >= 0; --i, --dseg)
2990 set_data_seg(dseg, wr->sg_list + i);
2991
2992 /*
2993 * Possibly overwrite stamping in cacheline with LSO
2994 * segment only after making sure all data segments
2995 * are written.
2996 */
2997 wmb();
2998 *lso_wqe = lso_hdr_sz;
2999
3000 ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ?
3001 MLX4_WQE_CTRL_FENCE : 0) | size;
3002
3003 /*
3004 * Make sure descriptor is fully written before
3005 * setting ownership bit (because HW can start
3006 * executing as soon as we do).
3007 */
3008 wmb();
3009
3010 if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) {
3011 *bad_wr = wr;
3012 err = -EINVAL;
3013 goto out;
3014 }
3015
3016 ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] |
3017 (ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0) | blh;
3018
3019 stamp = ind + qp->sq_spare_wqes;
3020 ind += DIV_ROUND_UP(size * 16, 1U << qp->sq.wqe_shift);
3021
3022 /*
3023 * We can improve latency by not stamping the last
3024 * send queue WQE until after ringing the doorbell, so
3025 * only stamp here if there are still more WQEs to post.
3026 *
3027 * Same optimization applies to padding with NOP wqe
3028 * in case of WQE shrinking (used to prevent wrap-around
3029 * in the middle of WR).
3030 */
3031 if (wr->next) {
3032 stamp_send_wqe(qp, stamp, size * 16);
3033 ind = pad_wraparound(qp, ind);
3034 }
3035 }
3036
3037 out:
3038 if (likely(nreq)) {
3039 qp->sq.head += nreq;
3040
3041 /*
3042 * Make sure that descriptors are written before
3043 * doorbell record.
3044 */
3045 wmb();
3046
3047 writel(qp->doorbell_qpn,
3048 to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL);
3049
3050 /*
3051 * Make sure doorbells don't leak out of SQ spinlock
3052 * and reach the HCA out of order.
3053 */
3054 mmiowb();
3055
3056 stamp_send_wqe(qp, stamp, size * 16);
3057
3058 ind = pad_wraparound(qp, ind);
3059 qp->sq_next_wqe = ind;
3060 }
3061
3062 spin_unlock_irqrestore(&qp->sq.lock, flags);
3063
3064 return err;
3065 }
3066
3067 int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
3068 struct ib_recv_wr **bad_wr)
3069 {
3070 struct mlx4_ib_qp *qp = to_mqp(ibqp);
3071 struct mlx4_wqe_data_seg *scat;
3072 unsigned long flags;
3073 int err = 0;
3074 int nreq;
3075 int ind;
3076 int max_gs;
3077 int i;
3078 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
3079
3080 max_gs = qp->rq.max_gs;
3081 spin_lock_irqsave(&qp->rq.lock, flags);
3082
3083 if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) {
3084 err = -EIO;
3085 *bad_wr = wr;
3086 nreq = 0;
3087 goto out;
3088 }
3089
3090 ind = qp->rq.head & (qp->rq.wqe_cnt - 1);
3091
3092 for (nreq = 0; wr; ++nreq, wr = wr->next) {
3093 if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
3094 err = -ENOMEM;
3095 *bad_wr = wr;
3096 goto out;
3097 }
3098
3099 if (unlikely(wr->num_sge > qp->rq.max_gs)) {
3100 err = -EINVAL;
3101 *bad_wr = wr;
3102 goto out;
3103 }
3104
3105 scat = get_recv_wqe(qp, ind);
3106
3107 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
3108 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
3109 ib_dma_sync_single_for_device(ibqp->device,
3110 qp->sqp_proxy_rcv[ind].map,
3111 sizeof (struct mlx4_ib_proxy_sqp_hdr),
3112 DMA_FROM_DEVICE);
3113 scat->byte_count =
3114 cpu_to_be32(sizeof (struct mlx4_ib_proxy_sqp_hdr));
3115 /* use dma lkey from upper layer entry */
3116 scat->lkey = cpu_to_be32(wr->sg_list->lkey);
3117 scat->addr = cpu_to_be64(qp->sqp_proxy_rcv[ind].map);
3118 scat++;
3119 max_gs--;
3120 }
3121
3122 for (i = 0; i < wr->num_sge; ++i)
3123 __set_data_seg(scat + i, wr->sg_list + i);
3124
3125 if (i < max_gs) {
3126 scat[i].byte_count = 0;
3127 scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY);
3128 scat[i].addr = 0;
3129 }
3130
3131 qp->rq.wrid[ind] = wr->wr_id;
3132
3133 ind = (ind + 1) & (qp->rq.wqe_cnt - 1);
3134 }
3135
3136 out:
3137 if (likely(nreq)) {
3138 qp->rq.head += nreq;
3139
3140 /*
3141 * Make sure that descriptors are written before
3142 * doorbell record.
3143 */
3144 wmb();
3145
3146 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
3147 }
3148
3149 spin_unlock_irqrestore(&qp->rq.lock, flags);
3150
3151 return err;
3152 }
3153
3154 static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state)
3155 {
3156 switch (mlx4_state) {
3157 case MLX4_QP_STATE_RST: return IB_QPS_RESET;
3158 case MLX4_QP_STATE_INIT: return IB_QPS_INIT;
3159 case MLX4_QP_STATE_RTR: return IB_QPS_RTR;
3160 case MLX4_QP_STATE_RTS: return IB_QPS_RTS;
3161 case MLX4_QP_STATE_SQ_DRAINING:
3162 case MLX4_QP_STATE_SQD: return IB_QPS_SQD;
3163 case MLX4_QP_STATE_SQER: return IB_QPS_SQE;
3164 case MLX4_QP_STATE_ERR: return IB_QPS_ERR;
3165 default: return -1;
3166 }
3167 }
3168
3169 static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state)
3170 {
3171 switch (mlx4_mig_state) {
3172 case MLX4_QP_PM_ARMED: return IB_MIG_ARMED;
3173 case MLX4_QP_PM_REARM: return IB_MIG_REARM;
3174 case MLX4_QP_PM_MIGRATED: return IB_MIG_MIGRATED;
3175 default: return -1;
3176 }
3177 }
3178
3179 static int to_ib_qp_access_flags(int mlx4_flags)
3180 {
3181 int ib_flags = 0;
3182
3183 if (mlx4_flags & MLX4_QP_BIT_RRE)
3184 ib_flags |= IB_ACCESS_REMOTE_READ;
3185 if (mlx4_flags & MLX4_QP_BIT_RWE)
3186 ib_flags |= IB_ACCESS_REMOTE_WRITE;
3187 if (mlx4_flags & MLX4_QP_BIT_RAE)
3188 ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
3189
3190 return ib_flags;
3191 }
3192
3193 static void to_ib_ah_attr(struct mlx4_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr,
3194 struct mlx4_qp_path *path)
3195 {
3196 struct mlx4_dev *dev = ibdev->dev;
3197 int is_eth;
3198
3199 memset(ib_ah_attr, 0, sizeof *ib_ah_attr);
3200 ib_ah_attr->port_num = path->sched_queue & 0x40 ? 2 : 1;
3201
3202 if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports)
3203 return;
3204
3205 is_eth = rdma_port_get_link_layer(&ibdev->ib_dev, ib_ah_attr->port_num) ==
3206 IB_LINK_LAYER_ETHERNET;
3207 if (is_eth)
3208 ib_ah_attr->sl = ((path->sched_queue >> 3) & 0x7) |
3209 ((path->sched_queue & 4) << 1);
3210 else
3211 ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf;
3212
3213 ib_ah_attr->dlid = be16_to_cpu(path->rlid);
3214 ib_ah_attr->src_path_bits = path->grh_mylmc & 0x7f;
3215 ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0;
3216 ib_ah_attr->ah_flags = (path->grh_mylmc & (1 << 7)) ? IB_AH_GRH : 0;
3217 if (ib_ah_attr->ah_flags) {
3218 ib_ah_attr->grh.sgid_index = path->mgid_index;
3219 ib_ah_attr->grh.hop_limit = path->hop_limit;
3220 ib_ah_attr->grh.traffic_class =
3221 (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff;
3222 ib_ah_attr->grh.flow_label =
3223 be32_to_cpu(path->tclass_flowlabel) & 0xfffff;
3224 memcpy(ib_ah_attr->grh.dgid.raw,
3225 path->rgid, sizeof ib_ah_attr->grh.dgid.raw);
3226 }
3227 }
3228
3229 int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
3230 struct ib_qp_init_attr *qp_init_attr)
3231 {
3232 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
3233 struct mlx4_ib_qp *qp = to_mqp(ibqp);
3234 struct mlx4_qp_context context;
3235 int mlx4_state;
3236 int err = 0;
3237
3238 mutex_lock(&qp->mutex);
3239
3240 if (qp->state == IB_QPS_RESET) {
3241 qp_attr->qp_state = IB_QPS_RESET;
3242 goto done;
3243 }
3244
3245 err = mlx4_qp_query(dev->dev, &qp->mqp, &context);
3246 if (err) {
3247 err = -EINVAL;
3248 goto out;
3249 }
3250
3251 mlx4_state = be32_to_cpu(context.flags) >> 28;
3252
3253 qp->state = to_ib_qp_state(mlx4_state);
3254 qp_attr->qp_state = qp->state;
3255 qp_attr->path_mtu = context.mtu_msgmax >> 5;
3256 qp_attr->path_mig_state =
3257 to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3);
3258 qp_attr->qkey = be32_to_cpu(context.qkey);
3259 qp_attr->rq_psn = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff;
3260 qp_attr->sq_psn = be32_to_cpu(context.next_send_psn) & 0xffffff;
3261 qp_attr->dest_qp_num = be32_to_cpu(context.remote_qpn) & 0xffffff;
3262 qp_attr->qp_access_flags =
3263 to_ib_qp_access_flags(be32_to_cpu(context.params2));
3264
3265 if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) {
3266 to_ib_ah_attr(dev, &qp_attr->ah_attr, &context.pri_path);
3267 to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context.alt_path);
3268 qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f;
3269 qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num;
3270 }
3271
3272 qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f;
3273 if (qp_attr->qp_state == IB_QPS_INIT)
3274 qp_attr->port_num = qp->port;
3275 else
3276 qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1;
3277
3278 /* qp_attr->en_sqd_async_notify is only applicable in modify qp */
3279 qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING;
3280
3281 qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7);
3282
3283 qp_attr->max_dest_rd_atomic =
3284 1 << ((be32_to_cpu(context.params2) >> 21) & 0x7);
3285 qp_attr->min_rnr_timer =
3286 (be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f;
3287 qp_attr->timeout = context.pri_path.ackto >> 3;
3288 qp_attr->retry_cnt = (be32_to_cpu(context.params1) >> 16) & 0x7;
3289 qp_attr->rnr_retry = (be32_to_cpu(context.params1) >> 13) & 0x7;
3290 qp_attr->alt_timeout = context.alt_path.ackto >> 3;
3291
3292 done:
3293 qp_attr->cur_qp_state = qp_attr->qp_state;
3294 qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt;
3295 qp_attr->cap.max_recv_sge = qp->rq.max_gs;
3296
3297 if (!ibqp->uobject) {
3298 qp_attr->cap.max_send_wr = qp->sq.wqe_cnt;
3299 qp_attr->cap.max_send_sge = qp->sq.max_gs;
3300 } else {
3301 qp_attr->cap.max_send_wr = 0;
3302 qp_attr->cap.max_send_sge = 0;
3303 }
3304
3305 /*
3306 * We don't support inline sends for kernel QPs (yet), and we
3307 * don't know what userspace's value should be.
3308 */
3309 qp_attr->cap.max_inline_data = 0;
3310
3311 qp_init_attr->cap = qp_attr->cap;
3312
3313 qp_init_attr->create_flags = 0;
3314 if (qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK)
3315 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
3316
3317 if (qp->flags & MLX4_IB_QP_LSO)
3318 qp_init_attr->create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
3319
3320 if (qp->flags & MLX4_IB_QP_NETIF)
3321 qp_init_attr->create_flags |= IB_QP_CREATE_NETIF_QP;
3322
3323 qp_init_attr->sq_sig_type =
3324 qp->sq_signal_bits == cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) ?
3325 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
3326
3327 out:
3328 mutex_unlock(&qp->mutex);
3329 return err;
3330 }
3331
Linux with added FPC-III support