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Linux 3.11-rc3
[cris-mirror.git] / drivers / infiniband / hw / mlx4 / qp.c
blob4f10af2905b505e1b9ae5c8a2ab13a634cdc4b4a
1 /*
2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34 #include <linux/log2.h>
35 #include <linux/slab.h>
36 #include <linux/netdevice.h>
37
38 #include <rdma/ib_cache.h>
39 #include <rdma/ib_pack.h>
40 #include <rdma/ib_addr.h>
41 #include <rdma/ib_mad.h>
42
43 #include <linux/mlx4/qp.h>
44
45 #include "mlx4_ib.h"
46 #include "user.h"
47
48 enum {
49 MLX4_IB_ACK_REQ_FREQ = 8,
50 };
51
52 enum {
53 MLX4_IB_DEFAULT_SCHED_QUEUE = 0x83,
54 MLX4_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f,
55 MLX4_IB_LINK_TYPE_IB = 0,
56 MLX4_IB_LINK_TYPE_ETH = 1
57 };
58
59 enum {
60 /*
61 * Largest possible UD header: send with GRH and immediate
62 * data plus 18 bytes for an Ethernet header with VLAN/802.1Q
63 * tag. (LRH would only use 8 bytes, so Ethernet is the
64 * biggest case)
65 */
66 MLX4_IB_UD_HEADER_SIZE = 82,
67 MLX4_IB_LSO_HEADER_SPARE = 128,
68 };
69
70 enum {
71 MLX4_IB_IBOE_ETHERTYPE = 0x8915
72 };
73
74 struct mlx4_ib_sqp {
75 struct mlx4_ib_qp qp;
76 int pkey_index;
77 u32 qkey;
78 u32 send_psn;
79 struct ib_ud_header ud_header;
80 u8 header_buf[MLX4_IB_UD_HEADER_SIZE];
81 };
82
83 enum {
84 MLX4_IB_MIN_SQ_STRIDE = 6,
85 MLX4_IB_CACHE_LINE_SIZE = 64,
86 };
87
88 enum {
89 MLX4_RAW_QP_MTU = 7,
90 MLX4_RAW_QP_MSGMAX = 31,
91 };
92
93 static const __be32 mlx4_ib_opcode[] = {
94 [IB_WR_SEND] = cpu_to_be32(MLX4_OPCODE_SEND),
95 [IB_WR_LSO] = cpu_to_be32(MLX4_OPCODE_LSO),
96 [IB_WR_SEND_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_SEND_IMM),
97 [IB_WR_RDMA_WRITE] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE),
98 [IB_WR_RDMA_WRITE_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE_IMM),
99 [IB_WR_RDMA_READ] = cpu_to_be32(MLX4_OPCODE_RDMA_READ),
100 [IB_WR_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_ATOMIC_CS),
101 [IB_WR_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_ATOMIC_FA),
102 [IB_WR_SEND_WITH_INV] = cpu_to_be32(MLX4_OPCODE_SEND_INVAL),
103 [IB_WR_LOCAL_INV] = cpu_to_be32(MLX4_OPCODE_LOCAL_INVAL),
104 [IB_WR_FAST_REG_MR] = cpu_to_be32(MLX4_OPCODE_FMR),
105 [IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_CS),
106 [IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_FA),
107 [IB_WR_BIND_MW] = cpu_to_be32(MLX4_OPCODE_BIND_MW),
108 };
109
110 static struct mlx4_ib_sqp *to_msqp(struct mlx4_ib_qp *mqp)
111 {
112 return container_of(mqp, struct mlx4_ib_sqp, qp);
113 }
114
115 static int is_tunnel_qp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
116 {
117 if (!mlx4_is_master(dev->dev))
118 return 0;
119
120 return qp->mqp.qpn >= dev->dev->phys_caps.base_tunnel_sqpn &&
121 qp->mqp.qpn < dev->dev->phys_caps.base_tunnel_sqpn +
122 8 * MLX4_MFUNC_MAX;
123 }
124
125 static int is_sqp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
126 {
127 int proxy_sqp = 0;
128 int real_sqp = 0;
129 int i;
130 /* PPF or Native -- real SQP */
131 real_sqp = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) &&
132 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn &&
133 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 3);
134 if (real_sqp)
135 return 1;
136 /* VF or PF -- proxy SQP */
137 if (mlx4_is_mfunc(dev->dev)) {
138 for (i = 0; i < dev->dev->caps.num_ports; i++) {
139 if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i] ||
140 qp->mqp.qpn == dev->dev->caps.qp1_proxy[i]) {
141 proxy_sqp = 1;
142 break;
143 }
144 }
145 }
146 return proxy_sqp;
147 }
148
149 /* used for INIT/CLOSE port logic */
150 static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
151 {
152 int proxy_qp0 = 0;
153 int real_qp0 = 0;
154 int i;
155 /* PPF or Native -- real QP0 */
156 real_qp0 = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) &&
157 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn &&
158 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 1);
159 if (real_qp0)
160 return 1;
161 /* VF or PF -- proxy QP0 */
162 if (mlx4_is_mfunc(dev->dev)) {
163 for (i = 0; i < dev->dev->caps.num_ports; i++) {
164 if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i]) {
165 proxy_qp0 = 1;
166 break;
167 }
168 }
169 }
170 return proxy_qp0;
171 }
172
173 static void *get_wqe(struct mlx4_ib_qp *qp, int offset)
174 {
175 return mlx4_buf_offset(&qp->buf, offset);
176 }
177
178 static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n)
179 {
180 return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift));
181 }
182
183 static void *get_send_wqe(struct mlx4_ib_qp *qp, int n)
184 {
185 return get_wqe(qp, qp->sq.offset + (n << qp->sq.wqe_shift));
186 }
187
188 /*
189 * Stamp a SQ WQE so that it is invalid if prefetched by marking the
190 * first four bytes of every 64 byte chunk with
191 * 0x7FFFFFF | (invalid_ownership_value << 31).
192 *
193 * When the max work request size is less than or equal to the WQE
194 * basic block size, as an optimization, we can stamp all WQEs with
195 * 0xffffffff, and skip the very first chunk of each WQE.
196 */
197 static void stamp_send_wqe(struct mlx4_ib_qp *qp, int n, int size)
198 {
199 __be32 *wqe;
200 int i;
201 int s;
202 int ind;
203 void *buf;
204 __be32 stamp;
205 struct mlx4_wqe_ctrl_seg *ctrl;
206
207 if (qp->sq_max_wqes_per_wr > 1) {
208 s = roundup(size, 1U << qp->sq.wqe_shift);
209 for (i = 0; i < s; i += 64) {
210 ind = (i >> qp->sq.wqe_shift) + n;
211 stamp = ind & qp->sq.wqe_cnt ? cpu_to_be32(0x7fffffff) :
212 cpu_to_be32(0xffffffff);
213 buf = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
214 wqe = buf + (i & ((1 << qp->sq.wqe_shift) - 1));
215 *wqe = stamp;
216 }
217 } else {
218 ctrl = buf = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
219 s = (ctrl->fence_size & 0x3f) << 4;
220 for (i = 64; i < s; i += 64) {
221 wqe = buf + i;
222 *wqe = cpu_to_be32(0xffffffff);
223 }
224 }
225 }
226
227 static void post_nop_wqe(struct mlx4_ib_qp *qp, int n, int size)
228 {
229 struct mlx4_wqe_ctrl_seg *ctrl;
230 struct mlx4_wqe_inline_seg *inl;
231 void *wqe;
232 int s;
233
234 ctrl = wqe = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
235 s = sizeof(struct mlx4_wqe_ctrl_seg);
236
237 if (qp->ibqp.qp_type == IB_QPT_UD) {
238 struct mlx4_wqe_datagram_seg *dgram = wqe + sizeof *ctrl;
239 struct mlx4_av *av = (struct mlx4_av *)dgram->av;
240 memset(dgram, 0, sizeof *dgram);
241 av->port_pd = cpu_to_be32((qp->port << 24) | to_mpd(qp->ibqp.pd)->pdn);
242 s += sizeof(struct mlx4_wqe_datagram_seg);
243 }
244
245 /* Pad the remainder of the WQE with an inline data segment. */
246 if (size > s) {
247 inl = wqe + s;
248 inl->byte_count = cpu_to_be32(1 << 31 | (size - s - sizeof *inl));
249 }
250 ctrl->srcrb_flags = 0;
251 ctrl->fence_size = size / 16;
252 /*
253 * Make sure descriptor is fully written before setting ownership bit
254 * (because HW can start executing as soon as we do).
255 */
256 wmb();
257
258 ctrl->owner_opcode = cpu_to_be32(MLX4_OPCODE_NOP | MLX4_WQE_CTRL_NEC) |
259 (n & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0);
260
261 stamp_send_wqe(qp, n + qp->sq_spare_wqes, size);
262 }
263
264 /* Post NOP WQE to prevent wrap-around in the middle of WR */
265 static inline unsigned pad_wraparound(struct mlx4_ib_qp *qp, int ind)
266 {
267 unsigned s = qp->sq.wqe_cnt - (ind & (qp->sq.wqe_cnt - 1));
268 if (unlikely(s < qp->sq_max_wqes_per_wr)) {
269 post_nop_wqe(qp, ind, s << qp->sq.wqe_shift);
270 ind += s;
271 }
272 return ind;
273 }
274
275 static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type)
276 {
277 struct ib_event event;
278 struct ib_qp *ibqp = &to_mibqp(qp)->ibqp;
279
280 if (type == MLX4_EVENT_TYPE_PATH_MIG)
281 to_mibqp(qp)->port = to_mibqp(qp)->alt_port;
282
283 if (ibqp->event_handler) {
284 event.device = ibqp->device;
285 event.element.qp = ibqp;
286 switch (type) {
287 case MLX4_EVENT_TYPE_PATH_MIG:
288 event.event = IB_EVENT_PATH_MIG;
289 break;
290 case MLX4_EVENT_TYPE_COMM_EST:
291 event.event = IB_EVENT_COMM_EST;
292 break;
293 case MLX4_EVENT_TYPE_SQ_DRAINED:
294 event.event = IB_EVENT_SQ_DRAINED;
295 break;
296 case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
297 event.event = IB_EVENT_QP_LAST_WQE_REACHED;
298 break;
299 case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
300 event.event = IB_EVENT_QP_FATAL;
301 break;
302 case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
303 event.event = IB_EVENT_PATH_MIG_ERR;
304 break;
305 case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
306 event.event = IB_EVENT_QP_REQ_ERR;
307 break;
308 case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
309 event.event = IB_EVENT_QP_ACCESS_ERR;
310 break;
311 default:
312 pr_warn("Unexpected event type %d "
313 "on QP %06x\n", type, qp->qpn);
314 return;
315 }
316
317 ibqp->event_handler(&event, ibqp->qp_context);
318 }
319 }
320
321 static int send_wqe_overhead(enum mlx4_ib_qp_type type, u32 flags)
322 {
323 /*
324 * UD WQEs must have a datagram segment.
325 * RC and UC WQEs might have a remote address segment.
326 * MLX WQEs need two extra inline data segments (for the UD
327 * header and space for the ICRC).
328 */
329 switch (type) {
330 case MLX4_IB_QPT_UD:
331 return sizeof (struct mlx4_wqe_ctrl_seg) +
332 sizeof (struct mlx4_wqe_datagram_seg) +
333 ((flags & MLX4_IB_QP_LSO) ? MLX4_IB_LSO_HEADER_SPARE : 0);
334 case MLX4_IB_QPT_PROXY_SMI_OWNER:
335 case MLX4_IB_QPT_PROXY_SMI:
336 case MLX4_IB_QPT_PROXY_GSI:
337 return sizeof (struct mlx4_wqe_ctrl_seg) +
338 sizeof (struct mlx4_wqe_datagram_seg) + 64;
339 case MLX4_IB_QPT_TUN_SMI_OWNER:
340 case MLX4_IB_QPT_TUN_GSI:
341 return sizeof (struct mlx4_wqe_ctrl_seg) +
342 sizeof (struct mlx4_wqe_datagram_seg);
343
344 case MLX4_IB_QPT_UC:
345 return sizeof (struct mlx4_wqe_ctrl_seg) +
346 sizeof (struct mlx4_wqe_raddr_seg);
347 case MLX4_IB_QPT_RC:
348 return sizeof (struct mlx4_wqe_ctrl_seg) +
349 sizeof (struct mlx4_wqe_atomic_seg) +
350 sizeof (struct mlx4_wqe_raddr_seg);
351 case MLX4_IB_QPT_SMI:
352 case MLX4_IB_QPT_GSI:
353 return sizeof (struct mlx4_wqe_ctrl_seg) +
354 ALIGN(MLX4_IB_UD_HEADER_SIZE +
355 DIV_ROUND_UP(MLX4_IB_UD_HEADER_SIZE,
356 MLX4_INLINE_ALIGN) *
357 sizeof (struct mlx4_wqe_inline_seg),
358 sizeof (struct mlx4_wqe_data_seg)) +
359 ALIGN(4 +
360 sizeof (struct mlx4_wqe_inline_seg),
361 sizeof (struct mlx4_wqe_data_seg));
362 default:
363 return sizeof (struct mlx4_wqe_ctrl_seg);
364 }
365 }
366
367 static int set_rq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
368 int is_user, int has_rq, struct mlx4_ib_qp *qp)
369 {
370 /* Sanity check RQ size before proceeding */
371 if (cap->max_recv_wr > dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE ||
372 cap->max_recv_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg))
373 return -EINVAL;
374
375 if (!has_rq) {
376 if (cap->max_recv_wr)
377 return -EINVAL;
378
379 qp->rq.wqe_cnt = qp->rq.max_gs = 0;
380 } else {
381 /* HW requires >= 1 RQ entry with >= 1 gather entry */
382 if (is_user && (!cap->max_recv_wr || !cap->max_recv_sge))
383 return -EINVAL;
384
385 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, cap->max_recv_wr));
386 qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge));
387 qp->rq.wqe_shift = ilog2(qp->rq.max_gs * sizeof (struct mlx4_wqe_data_seg));
388 }
389
390 /* leave userspace return values as they were, so as not to break ABI */
391 if (is_user) {
392 cap->max_recv_wr = qp->rq.max_post = qp->rq.wqe_cnt;
393 cap->max_recv_sge = qp->rq.max_gs;
394 } else {
395 cap->max_recv_wr = qp->rq.max_post =
396 min(dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE, qp->rq.wqe_cnt);
397 cap->max_recv_sge = min(qp->rq.max_gs,
398 min(dev->dev->caps.max_sq_sg,
399 dev->dev->caps.max_rq_sg));
400 }
401
402 return 0;
403 }
404
405 static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
406 enum mlx4_ib_qp_type type, struct mlx4_ib_qp *qp)
407 {
408 int s;
409
410 /* Sanity check SQ size before proceeding */
411 if (cap->max_send_wr > (dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE) ||
412 cap->max_send_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg) ||
413 cap->max_inline_data + send_wqe_overhead(type, qp->flags) +
414 sizeof (struct mlx4_wqe_inline_seg) > dev->dev->caps.max_sq_desc_sz)
415 return -EINVAL;
416
417 /*
418 * For MLX transport we need 2 extra S/G entries:
419 * one for the header and one for the checksum at the end
420 */
421 if ((type == MLX4_IB_QPT_SMI || type == MLX4_IB_QPT_GSI ||
422 type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) &&
423 cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg)
424 return -EINVAL;
425
426 s = max(cap->max_send_sge * sizeof (struct mlx4_wqe_data_seg),
427 cap->max_inline_data + sizeof (struct mlx4_wqe_inline_seg)) +
428 send_wqe_overhead(type, qp->flags);
429
430 if (s > dev->dev->caps.max_sq_desc_sz)
431 return -EINVAL;
432
433 /*
434 * Hermon supports shrinking WQEs, such that a single work
435 * request can include multiple units of 1 << wqe_shift. This
436 * way, work requests can differ in size, and do not have to
437 * be a power of 2 in size, saving memory and speeding up send
438 * WR posting. Unfortunately, if we do this then the
439 * wqe_index field in CQEs can't be used to look up the WR ID
440 * anymore, so we do this only if selective signaling is off.
441 *
442 * Further, on 32-bit platforms, we can't use vmap() to make
443 * the QP buffer virtually contiguous. Thus we have to use
444 * constant-sized WRs to make sure a WR is always fully within
445 * a single page-sized chunk.
446 *
447 * Finally, we use NOP work requests to pad the end of the
448 * work queue, to avoid wrap-around in the middle of WR. We
449 * set NEC bit to avoid getting completions with error for
450 * these NOP WRs, but since NEC is only supported starting
451 * with firmware 2.2.232, we use constant-sized WRs for older
452 * firmware.
453 *
454 * And, since MLX QPs only support SEND, we use constant-sized
455 * WRs in this case.
456 *
457 * We look for the smallest value of wqe_shift such that the
458 * resulting number of wqes does not exceed device
459 * capabilities.
460 *
461 * We set WQE size to at least 64 bytes, this way stamping
462 * invalidates each WQE.
463 */
464 if (dev->dev->caps.fw_ver >= MLX4_FW_VER_WQE_CTRL_NEC &&
465 qp->sq_signal_bits && BITS_PER_LONG == 64 &&
466 type != MLX4_IB_QPT_SMI && type != MLX4_IB_QPT_GSI &&
467 !(type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_PROXY_SMI |
468 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER)))
469 qp->sq.wqe_shift = ilog2(64);
470 else
471 qp->sq.wqe_shift = ilog2(roundup_pow_of_two(s));
472
473 for (;;) {
474 qp->sq_max_wqes_per_wr = DIV_ROUND_UP(s, 1U << qp->sq.wqe_shift);
475
476 /*
477 * We need to leave 2 KB + 1 WR of headroom in the SQ to
478 * allow HW to prefetch.
479 */
480 qp->sq_spare_wqes = (2048 >> qp->sq.wqe_shift) + qp->sq_max_wqes_per_wr;
481 qp->sq.wqe_cnt = roundup_pow_of_two(cap->max_send_wr *
482 qp->sq_max_wqes_per_wr +
483 qp->sq_spare_wqes);
484
485 if (qp->sq.wqe_cnt <= dev->dev->caps.max_wqes)
486 break;
487
488 if (qp->sq_max_wqes_per_wr <= 1)
489 return -EINVAL;
490
491 ++qp->sq.wqe_shift;
492 }
493
494 qp->sq.max_gs = (min(dev->dev->caps.max_sq_desc_sz,
495 (qp->sq_max_wqes_per_wr << qp->sq.wqe_shift)) -
496 send_wqe_overhead(type, qp->flags)) /
497 sizeof (struct mlx4_wqe_data_seg);
498
499 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
500 (qp->sq.wqe_cnt << qp->sq.wqe_shift);
501 if (qp->rq.wqe_shift > qp->sq.wqe_shift) {
502 qp->rq.offset = 0;
503 qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift;
504 } else {
505 qp->rq.offset = qp->sq.wqe_cnt << qp->sq.wqe_shift;
506 qp->sq.offset = 0;
507 }
508
509 cap->max_send_wr = qp->sq.max_post =
510 (qp->sq.wqe_cnt - qp->sq_spare_wqes) / qp->sq_max_wqes_per_wr;
511 cap->max_send_sge = min(qp->sq.max_gs,
512 min(dev->dev->caps.max_sq_sg,
513 dev->dev->caps.max_rq_sg));
514 /* We don't support inline sends for kernel QPs (yet) */
515 cap->max_inline_data = 0;
516
517 return 0;
518 }
519
520 static int set_user_sq_size(struct mlx4_ib_dev *dev,
521 struct mlx4_ib_qp *qp,
522 struct mlx4_ib_create_qp *ucmd)
523 {
524 /* Sanity check SQ size before proceeding */
525 if ((1 << ucmd->log_sq_bb_count) > dev->dev->caps.max_wqes ||
526 ucmd->log_sq_stride >
527 ilog2(roundup_pow_of_two(dev->dev->caps.max_sq_desc_sz)) ||
528 ucmd->log_sq_stride < MLX4_IB_MIN_SQ_STRIDE)
529 return -EINVAL;
530
531 qp->sq.wqe_cnt = 1 << ucmd->log_sq_bb_count;
532 qp->sq.wqe_shift = ucmd->log_sq_stride;
533
534 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
535 (qp->sq.wqe_cnt << qp->sq.wqe_shift);
536
537 return 0;
538 }
539
540 static int alloc_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp)
541 {
542 int i;
543
544 qp->sqp_proxy_rcv =
545 kmalloc(sizeof (struct mlx4_ib_buf) * qp->rq.wqe_cnt,
546 GFP_KERNEL);
547 if (!qp->sqp_proxy_rcv)
548 return -ENOMEM;
549 for (i = 0; i < qp->rq.wqe_cnt; i++) {
550 qp->sqp_proxy_rcv[i].addr =
551 kmalloc(sizeof (struct mlx4_ib_proxy_sqp_hdr),
552 GFP_KERNEL);
553 if (!qp->sqp_proxy_rcv[i].addr)
554 goto err;
555 qp->sqp_proxy_rcv[i].map =
556 ib_dma_map_single(dev, qp->sqp_proxy_rcv[i].addr,
557 sizeof (struct mlx4_ib_proxy_sqp_hdr),
558 DMA_FROM_DEVICE);
559 }
560 return 0;
561
562 err:
563 while (i > 0) {
564 --i;
565 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map,
566 sizeof (struct mlx4_ib_proxy_sqp_hdr),
567 DMA_FROM_DEVICE);
568 kfree(qp->sqp_proxy_rcv[i].addr);
569 }
570 kfree(qp->sqp_proxy_rcv);
571 qp->sqp_proxy_rcv = NULL;
572 return -ENOMEM;
573 }
574
575 static void free_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp)
576 {
577 int i;
578
579 for (i = 0; i < qp->rq.wqe_cnt; 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 }
587
588 static int qp_has_rq(struct ib_qp_init_attr *attr)
589 {
590 if (attr->qp_type == IB_QPT_XRC_INI || attr->qp_type == IB_QPT_XRC_TGT)
591 return 0;
592
593 return !attr->srq;
594 }
595
596 static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
597 struct ib_qp_init_attr *init_attr,
598 struct ib_udata *udata, int sqpn, struct mlx4_ib_qp **caller_qp)
599 {
600 int qpn;
601 int err;
602 struct mlx4_ib_sqp *sqp;
603 struct mlx4_ib_qp *qp;
604 enum mlx4_ib_qp_type qp_type = (enum mlx4_ib_qp_type) init_attr->qp_type;
605
606 /* When tunneling special qps, we use a plain UD qp */
607 if (sqpn) {
608 if (mlx4_is_mfunc(dev->dev) &&
609 (!mlx4_is_master(dev->dev) ||
610 !(init_attr->create_flags & MLX4_IB_SRIOV_SQP))) {
611 if (init_attr->qp_type == IB_QPT_GSI)
612 qp_type = MLX4_IB_QPT_PROXY_GSI;
613 else if (mlx4_is_master(dev->dev))
614 qp_type = MLX4_IB_QPT_PROXY_SMI_OWNER;
615 else
616 qp_type = MLX4_IB_QPT_PROXY_SMI;
617 }
618 qpn = sqpn;
619 /* add extra sg entry for tunneling */
620 init_attr->cap.max_recv_sge++;
621 } else if (init_attr->create_flags & MLX4_IB_SRIOV_TUNNEL_QP) {
622 struct mlx4_ib_qp_tunnel_init_attr *tnl_init =
623 container_of(init_attr,
624 struct mlx4_ib_qp_tunnel_init_attr, init_attr);
625 if ((tnl_init->proxy_qp_type != IB_QPT_SMI &&
626 tnl_init->proxy_qp_type != IB_QPT_GSI) ||
627 !mlx4_is_master(dev->dev))
628 return -EINVAL;
629 if (tnl_init->proxy_qp_type == IB_QPT_GSI)
630 qp_type = MLX4_IB_QPT_TUN_GSI;
631 else if (tnl_init->slave == mlx4_master_func_num(dev->dev))
632 qp_type = MLX4_IB_QPT_TUN_SMI_OWNER;
633 else
634 qp_type = MLX4_IB_QPT_TUN_SMI;
635 /* we are definitely in the PPF here, since we are creating
636 * tunnel QPs. base_tunnel_sqpn is therefore valid. */
637 qpn = dev->dev->phys_caps.base_tunnel_sqpn + 8 * tnl_init->slave
638 + tnl_init->proxy_qp_type * 2 + tnl_init->port - 1;
639 sqpn = qpn;
640 }
641
642 if (!*caller_qp) {
643 if (qp_type == MLX4_IB_QPT_SMI || qp_type == MLX4_IB_QPT_GSI ||
644 (qp_type & (MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_SMI_OWNER |
645 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER))) {
646 sqp = kzalloc(sizeof (struct mlx4_ib_sqp), GFP_KERNEL);
647 if (!sqp)
648 return -ENOMEM;
649 qp = &sqp->qp;
650 } else {
651 qp = kzalloc(sizeof (struct mlx4_ib_qp), GFP_KERNEL);
652 if (!qp)
653 return -ENOMEM;
654 }
655 } else
656 qp = *caller_qp;
657
658 qp->mlx4_ib_qp_type = qp_type;
659
660 mutex_init(&qp->mutex);
661 spin_lock_init(&qp->sq.lock);
662 spin_lock_init(&qp->rq.lock);
663 INIT_LIST_HEAD(&qp->gid_list);
664 INIT_LIST_HEAD(&qp->steering_rules);
665
666 qp->state = IB_QPS_RESET;
667 if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
668 qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
669
670 err = set_rq_size(dev, &init_attr->cap, !!pd->uobject, qp_has_rq(init_attr), qp);
671 if (err)
672 goto err;
673
674 if (pd->uobject) {
675 struct mlx4_ib_create_qp ucmd;
676
677 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
678 err = -EFAULT;
679 goto err;
680 }
681
682 qp->sq_no_prefetch = ucmd.sq_no_prefetch;
683
684 err = set_user_sq_size(dev, qp, &ucmd);
685 if (err)
686 goto err;
687
688 qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
689 qp->buf_size, 0, 0);
690 if (IS_ERR(qp->umem)) {
691 err = PTR_ERR(qp->umem);
692 goto err;
693 }
694
695 err = mlx4_mtt_init(dev->dev, ib_umem_page_count(qp->umem),
696 ilog2(qp->umem->page_size), &qp->mtt);
697 if (err)
698 goto err_buf;
699
700 err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem);
701 if (err)
702 goto err_mtt;
703
704 if (qp_has_rq(init_attr)) {
705 err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context),
706 ucmd.db_addr, &qp->db);
707 if (err)
708 goto err_mtt;
709 }
710 } else {
711 qp->sq_no_prefetch = 0;
712
713 if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK)
714 qp->flags |= MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK;
715
716 if (init_attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO)
717 qp->flags |= MLX4_IB_QP_LSO;
718
719 err = set_kernel_sq_size(dev, &init_attr->cap, qp_type, qp);
720 if (err)
721 goto err;
722
723 if (qp_has_rq(init_attr)) {
724 err = mlx4_db_alloc(dev->dev, &qp->db, 0);
725 if (err)
726 goto err;
727
728 *qp->db.db = 0;
729 }
730
731 if (mlx4_buf_alloc(dev->dev, qp->buf_size, PAGE_SIZE * 2, &qp->buf)) {
732 err = -ENOMEM;
733 goto err_db;
734 }
735
736 err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift,
737 &qp->mtt);
738 if (err)
739 goto err_buf;
740
741 err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf);
742 if (err)
743 goto err_mtt;
744
745 qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof (u64), GFP_KERNEL);
746 qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof (u64), GFP_KERNEL);
747
748 if (!qp->sq.wrid || !qp->rq.wrid) {
749 err = -ENOMEM;
750 goto err_wrid;
751 }
752 }
753
754 if (sqpn) {
755 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
756 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
757 if (alloc_proxy_bufs(pd->device, qp)) {
758 err = -ENOMEM;
759 goto err_wrid;
760 }
761 }
762 } else {
763 /* Raw packet QPNs must be aligned to 8 bits. If not, the WQE
764 * BlueFlame setup flow wrongly causes VLAN insertion. */
765 if (init_attr->qp_type == IB_QPT_RAW_PACKET)
766 err = mlx4_qp_reserve_range(dev->dev, 1, 1 << 8, &qpn);
767 else
768 err = mlx4_qp_reserve_range(dev->dev, 1, 1, &qpn);
769 if (err)
770 goto err_proxy;
771 }
772
773 err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp);
774 if (err)
775 goto err_qpn;
776
777 if (init_attr->qp_type == IB_QPT_XRC_TGT)
778 qp->mqp.qpn |= (1 << 23);
779
780 /*
781 * Hardware wants QPN written in big-endian order (after
782 * shifting) for send doorbell. Precompute this value to save
783 * a little bit when posting sends.
784 */
785 qp->doorbell_qpn = swab32(qp->mqp.qpn << 8);
786
787 qp->mqp.event = mlx4_ib_qp_event;
788 if (!*caller_qp)
789 *caller_qp = qp;
790 return 0;
791
792 err_qpn:
793 if (!sqpn)
794 mlx4_qp_release_range(dev->dev, qpn, 1);
795 err_proxy:
796 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI)
797 free_proxy_bufs(pd->device, qp);
798 err_wrid:
799 if (pd->uobject) {
800 if (qp_has_rq(init_attr))
801 mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db);
802 } else {
803 kfree(qp->sq.wrid);
804 kfree(qp->rq.wrid);
805 }
806
807 err_mtt:
808 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
809
810 err_buf:
811 if (pd->uobject)
812 ib_umem_release(qp->umem);
813 else
814 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
815
816 err_db:
817 if (!pd->uobject && qp_has_rq(init_attr))
818 mlx4_db_free(dev->dev, &qp->db);
819
820 err:
821 if (!*caller_qp)
822 kfree(qp);
823 return err;
824 }
825
826 static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state)
827 {
828 switch (state) {
829 case IB_QPS_RESET: return MLX4_QP_STATE_RST;
830 case IB_QPS_INIT: return MLX4_QP_STATE_INIT;
831 case IB_QPS_RTR: return MLX4_QP_STATE_RTR;
832 case IB_QPS_RTS: return MLX4_QP_STATE_RTS;
833 case IB_QPS_SQD: return MLX4_QP_STATE_SQD;
834 case IB_QPS_SQE: return MLX4_QP_STATE_SQER;
835 case IB_QPS_ERR: return MLX4_QP_STATE_ERR;
836 default: return -1;
837 }
838 }
839
840 static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
841 __acquires(&send_cq->lock) __acquires(&recv_cq->lock)
842 {
843 if (send_cq == recv_cq) {
844 spin_lock_irq(&send_cq->lock);
845 __acquire(&recv_cq->lock);
846 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
847 spin_lock_irq(&send_cq->lock);
848 spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING);
849 } else {
850 spin_lock_irq(&recv_cq->lock);
851 spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING);
852 }
853 }
854
855 static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
856 __releases(&send_cq->lock) __releases(&recv_cq->lock)
857 {
858 if (send_cq == recv_cq) {
859 __release(&recv_cq->lock);
860 spin_unlock_irq(&send_cq->lock);
861 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
862 spin_unlock(&recv_cq->lock);
863 spin_unlock_irq(&send_cq->lock);
864 } else {
865 spin_unlock(&send_cq->lock);
866 spin_unlock_irq(&recv_cq->lock);
867 }
868 }
869
870 static void del_gid_entries(struct mlx4_ib_qp *qp)
871 {
872 struct mlx4_ib_gid_entry *ge, *tmp;
873
874 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
875 list_del(&ge->list);
876 kfree(ge);
877 }
878 }
879
880 static struct mlx4_ib_pd *get_pd(struct mlx4_ib_qp *qp)
881 {
882 if (qp->ibqp.qp_type == IB_QPT_XRC_TGT)
883 return to_mpd(to_mxrcd(qp->ibqp.xrcd)->pd);
884 else
885 return to_mpd(qp->ibqp.pd);
886 }
887
888 static void get_cqs(struct mlx4_ib_qp *qp,
889 struct mlx4_ib_cq **send_cq, struct mlx4_ib_cq **recv_cq)
890 {
891 switch (qp->ibqp.qp_type) {
892 case IB_QPT_XRC_TGT:
893 *send_cq = to_mcq(to_mxrcd(qp->ibqp.xrcd)->cq);
894 *recv_cq = *send_cq;
895 break;
896 case IB_QPT_XRC_INI:
897 *send_cq = to_mcq(qp->ibqp.send_cq);
898 *recv_cq = *send_cq;
899 break;
900 default:
901 *send_cq = to_mcq(qp->ibqp.send_cq);
902 *recv_cq = to_mcq(qp->ibqp.recv_cq);
903 break;
904 }
905 }
906
907 static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
908 int is_user)
909 {
910 struct mlx4_ib_cq *send_cq, *recv_cq;
911
912 if (qp->state != IB_QPS_RESET)
913 if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state),
914 MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp))
915 pr_warn("modify QP %06x to RESET failed.\n",
916 qp->mqp.qpn);
917
918 get_cqs(qp, &send_cq, &recv_cq);
919
920 mlx4_ib_lock_cqs(send_cq, recv_cq);
921
922 if (!is_user) {
923 __mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
924 qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL);
925 if (send_cq != recv_cq)
926 __mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
927 }
928
929 mlx4_qp_remove(dev->dev, &qp->mqp);
930
931 mlx4_ib_unlock_cqs(send_cq, recv_cq);
932
933 mlx4_qp_free(dev->dev, &qp->mqp);
934
935 if (!is_sqp(dev, qp) && !is_tunnel_qp(dev, qp))
936 mlx4_qp_release_range(dev->dev, qp->mqp.qpn, 1);
937
938 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
939
940 if (is_user) {
941 if (qp->rq.wqe_cnt)
942 mlx4_ib_db_unmap_user(to_mucontext(qp->ibqp.uobject->context),
943 &qp->db);
944 ib_umem_release(qp->umem);
945 } else {
946 kfree(qp->sq.wrid);
947 kfree(qp->rq.wrid);
948 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
949 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI))
950 free_proxy_bufs(&dev->ib_dev, qp);
951 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
952 if (qp->rq.wqe_cnt)
953 mlx4_db_free(dev->dev, &qp->db);
954 }
955
956 del_gid_entries(qp);
957 }
958
959 static u32 get_sqp_num(struct mlx4_ib_dev *dev, struct ib_qp_init_attr *attr)
960 {
961 /* Native or PPF */
962 if (!mlx4_is_mfunc(dev->dev) ||
963 (mlx4_is_master(dev->dev) &&
964 attr->create_flags & MLX4_IB_SRIOV_SQP)) {
965 return dev->dev->phys_caps.base_sqpn +
966 (attr->qp_type == IB_QPT_SMI ? 0 : 2) +
967 attr->port_num - 1;
968 }
969 /* PF or VF -- creating proxies */
970 if (attr->qp_type == IB_QPT_SMI)
971 return dev->dev->caps.qp0_proxy[attr->port_num - 1];
972 else
973 return dev->dev->caps.qp1_proxy[attr->port_num - 1];
974 }
975
976 struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd,
977 struct ib_qp_init_attr *init_attr,
978 struct ib_udata *udata)
979 {
980 struct mlx4_ib_qp *qp = NULL;
981 int err;
982 u16 xrcdn = 0;
983
984 /*
985 * We only support LSO, vendor flag1, and multicast loopback blocking,
986 * and only for kernel UD QPs.
987 */
988 if (init_attr->create_flags & ~(MLX4_IB_QP_LSO |
989 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK |
990 MLX4_IB_SRIOV_TUNNEL_QP | MLX4_IB_SRIOV_SQP))
991 return ERR_PTR(-EINVAL);
992
993 if (init_attr->create_flags &&
994 (udata ||
995 ((init_attr->create_flags & ~MLX4_IB_SRIOV_SQP) &&
996 init_attr->qp_type != IB_QPT_UD) ||
997 ((init_attr->create_flags & MLX4_IB_SRIOV_SQP) &&
998 init_attr->qp_type > IB_QPT_GSI)))
999 return ERR_PTR(-EINVAL);
1000
1001 switch (init_attr->qp_type) {
1002 case IB_QPT_XRC_TGT:
1003 pd = to_mxrcd(init_attr->xrcd)->pd;
1004 xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn;
1005 init_attr->send_cq = to_mxrcd(init_attr->xrcd)->cq;
1006 /* fall through */
1007 case IB_QPT_XRC_INI:
1008 if (!(to_mdev(pd->device)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC))
1009 return ERR_PTR(-ENOSYS);
1010 init_attr->recv_cq = init_attr->send_cq;
1011 /* fall through */
1012 case IB_QPT_RC:
1013 case IB_QPT_UC:
1014 case IB_QPT_RAW_PACKET:
1015 qp = kzalloc(sizeof *qp, GFP_KERNEL);
1016 if (!qp)
1017 return ERR_PTR(-ENOMEM);
1018 /* fall through */
1019 case IB_QPT_UD:
1020 {
1021 err = create_qp_common(to_mdev(pd->device), pd, init_attr,
1022 udata, 0, &qp);
1023 if (err)
1024 return ERR_PTR(err);
1025
1026 qp->ibqp.qp_num = qp->mqp.qpn;
1027 qp->xrcdn = xrcdn;
1028
1029 break;
1030 }
1031 case IB_QPT_SMI:
1032 case IB_QPT_GSI:
1033 {
1034 /* Userspace is not allowed to create special QPs: */
1035 if (udata)
1036 return ERR_PTR(-EINVAL);
1037
1038 err = create_qp_common(to_mdev(pd->device), pd, init_attr, udata,
1039 get_sqp_num(to_mdev(pd->device), init_attr),
1040 &qp);
1041 if (err)
1042 return ERR_PTR(err);
1043
1044 qp->port = init_attr->port_num;
1045 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
1046
1047 break;
1048 }
1049 default:
1050 /* Don't support raw QPs */
1051 return ERR_PTR(-EINVAL);
1052 }
1053
1054 return &qp->ibqp;
1055 }
1056
1057 int mlx4_ib_destroy_qp(struct ib_qp *qp)
1058 {
1059 struct mlx4_ib_dev *dev = to_mdev(qp->device);
1060 struct mlx4_ib_qp *mqp = to_mqp(qp);
1061 struct mlx4_ib_pd *pd;
1062
1063 if (is_qp0(dev, mqp))
1064 mlx4_CLOSE_PORT(dev->dev, mqp->port);
1065
1066 pd = get_pd(mqp);
1067 destroy_qp_common(dev, mqp, !!pd->ibpd.uobject);
1068
1069 if (is_sqp(dev, mqp))
1070 kfree(to_msqp(mqp));
1071 else
1072 kfree(mqp);
1073
1074 return 0;
1075 }
1076
1077 static int to_mlx4_st(struct mlx4_ib_dev *dev, enum mlx4_ib_qp_type type)
1078 {
1079 switch (type) {
1080 case MLX4_IB_QPT_RC: return MLX4_QP_ST_RC;
1081 case MLX4_IB_QPT_UC: return MLX4_QP_ST_UC;
1082 case MLX4_IB_QPT_UD: return MLX4_QP_ST_UD;
1083 case MLX4_IB_QPT_XRC_INI:
1084 case MLX4_IB_QPT_XRC_TGT: return MLX4_QP_ST_XRC;
1085 case MLX4_IB_QPT_SMI:
1086 case MLX4_IB_QPT_GSI:
1087 case MLX4_IB_QPT_RAW_PACKET: return MLX4_QP_ST_MLX;
1088
1089 case MLX4_IB_QPT_PROXY_SMI_OWNER:
1090 case MLX4_IB_QPT_TUN_SMI_OWNER: return (mlx4_is_mfunc(dev->dev) ?
1091 MLX4_QP_ST_MLX : -1);
1092 case MLX4_IB_QPT_PROXY_SMI:
1093 case MLX4_IB_QPT_TUN_SMI:
1094 case MLX4_IB_QPT_PROXY_GSI:
1095 case MLX4_IB_QPT_TUN_GSI: return (mlx4_is_mfunc(dev->dev) ?
1096 MLX4_QP_ST_UD : -1);
1097 default: return -1;
1098 }
1099 }
1100
1101 static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, const struct ib_qp_attr *attr,
1102 int attr_mask)
1103 {
1104 u8 dest_rd_atomic;
1105 u32 access_flags;
1106 u32 hw_access_flags = 0;
1107
1108 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1109 dest_rd_atomic = attr->max_dest_rd_atomic;
1110 else
1111 dest_rd_atomic = qp->resp_depth;
1112
1113 if (attr_mask & IB_QP_ACCESS_FLAGS)
1114 access_flags = attr->qp_access_flags;
1115 else
1116 access_flags = qp->atomic_rd_en;
1117
1118 if (!dest_rd_atomic)
1119 access_flags &= IB_ACCESS_REMOTE_WRITE;
1120
1121 if (access_flags & IB_ACCESS_REMOTE_READ)
1122 hw_access_flags |= MLX4_QP_BIT_RRE;
1123 if (access_flags & IB_ACCESS_REMOTE_ATOMIC)
1124 hw_access_flags |= MLX4_QP_BIT_RAE;
1125 if (access_flags & IB_ACCESS_REMOTE_WRITE)
1126 hw_access_flags |= MLX4_QP_BIT_RWE;
1127
1128 return cpu_to_be32(hw_access_flags);
1129 }
1130
1131 static void store_sqp_attrs(struct mlx4_ib_sqp *sqp, const struct ib_qp_attr *attr,
1132 int attr_mask)
1133 {
1134 if (attr_mask & IB_QP_PKEY_INDEX)
1135 sqp->pkey_index = attr->pkey_index;
1136 if (attr_mask & IB_QP_QKEY)
1137 sqp->qkey = attr->qkey;
1138 if (attr_mask & IB_QP_SQ_PSN)
1139 sqp->send_psn = attr->sq_psn;
1140 }
1141
1142 static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port)
1143 {
1144 path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6);
1145 }
1146
1147 static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah,
1148 struct mlx4_qp_path *path, u8 port)
1149 {
1150 int err;
1151 int is_eth = rdma_port_get_link_layer(&dev->ib_dev, port) ==
1152 IB_LINK_LAYER_ETHERNET;
1153 u8 mac[6];
1154 int is_mcast;
1155 u16 vlan_tag;
1156 int vidx;
1157
1158 path->grh_mylmc = ah->src_path_bits & 0x7f;
1159 path->rlid = cpu_to_be16(ah->dlid);
1160 if (ah->static_rate) {
1161 path->static_rate = ah->static_rate + MLX4_STAT_RATE_OFFSET;
1162 while (path->static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
1163 !(1 << path->static_rate & dev->dev->caps.stat_rate_support))
1164 --path->static_rate;
1165 } else
1166 path->static_rate = 0;
1167
1168 if (ah->ah_flags & IB_AH_GRH) {
1169 if (ah->grh.sgid_index >= dev->dev->caps.gid_table_len[port]) {
1170 pr_err("sgid_index (%u) too large. max is %d\n",
1171 ah->grh.sgid_index, dev->dev->caps.gid_table_len[port] - 1);
1172 return -1;
1173 }
1174
1175 path->grh_mylmc |= 1 << 7;
1176 path->mgid_index = ah->grh.sgid_index;
1177 path->hop_limit = ah->grh.hop_limit;
1178 path->tclass_flowlabel =
1179 cpu_to_be32((ah->grh.traffic_class << 20) |
1180 (ah->grh.flow_label));
1181 memcpy(path->rgid, ah->grh.dgid.raw, 16);
1182 }
1183
1184 if (is_eth) {
1185 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
1186 ((port - 1) << 6) | ((ah->sl & 7) << 3);
1187
1188 if (!(ah->ah_flags & IB_AH_GRH))
1189 return -1;
1190
1191 err = mlx4_ib_resolve_grh(dev, ah, mac, &is_mcast, port);
1192 if (err)
1193 return err;
1194
1195 memcpy(path->dmac, mac, 6);
1196 path->ackto = MLX4_IB_LINK_TYPE_ETH;
1197 /* use index 0 into MAC table for IBoE */
1198 path->grh_mylmc &= 0x80;
1199
1200 vlan_tag = rdma_get_vlan_id(&dev->iboe.gid_table[port - 1][ah->grh.sgid_index]);
1201 if (vlan_tag < 0x1000) {
1202 if (mlx4_find_cached_vlan(dev->dev, port, vlan_tag, &vidx))
1203 return -ENOENT;
1204
1205 path->vlan_index = vidx;
1206 path->fl = 1 << 6;
1207 }
1208 } else
1209 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
1210 ((port - 1) << 6) | ((ah->sl & 0xf) << 2);
1211
1212 return 0;
1213 }
1214
1215 static void update_mcg_macs(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
1216 {
1217 struct mlx4_ib_gid_entry *ge, *tmp;
1218
1219 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
1220 if (!ge->added && mlx4_ib_add_mc(dev, qp, &ge->gid)) {
1221 ge->added = 1;
1222 ge->port = qp->port;
1223 }
1224 }
1225 }
1226
1227 static int __mlx4_ib_modify_qp(struct ib_qp *ibqp,
1228 const struct ib_qp_attr *attr, int attr_mask,
1229 enum ib_qp_state cur_state, enum ib_qp_state new_state)
1230 {
1231 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
1232 struct mlx4_ib_qp *qp = to_mqp(ibqp);
1233 struct mlx4_ib_pd *pd;
1234 struct mlx4_ib_cq *send_cq, *recv_cq;
1235 struct mlx4_qp_context *context;
1236 enum mlx4_qp_optpar optpar = 0;
1237 int sqd_event;
1238 int err = -EINVAL;
1239
1240 context = kzalloc(sizeof *context, GFP_KERNEL);
1241 if (!context)
1242 return -ENOMEM;
1243
1244 context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) |
1245 (to_mlx4_st(dev, qp->mlx4_ib_qp_type) << 16));
1246
1247 if (!(attr_mask & IB_QP_PATH_MIG_STATE))
1248 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
1249 else {
1250 optpar |= MLX4_QP_OPTPAR_PM_STATE;
1251 switch (attr->path_mig_state) {
1252 case IB_MIG_MIGRATED:
1253 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
1254 break;
1255 case IB_MIG_REARM:
1256 context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11);
1257 break;
1258 case IB_MIG_ARMED:
1259 context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11);
1260 break;
1261 }
1262 }
1263
1264 if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI)
1265 context->mtu_msgmax = (IB_MTU_4096 << 5) | 11;
1266 else if (ibqp->qp_type == IB_QPT_RAW_PACKET)
1267 context->mtu_msgmax = (MLX4_RAW_QP_MTU << 5) | MLX4_RAW_QP_MSGMAX;
1268 else if (ibqp->qp_type == IB_QPT_UD) {
1269 if (qp->flags & MLX4_IB_QP_LSO)
1270 context->mtu_msgmax = (IB_MTU_4096 << 5) |
1271 ilog2(dev->dev->caps.max_gso_sz);
1272 else
1273 context->mtu_msgmax = (IB_MTU_4096 << 5) | 12;
1274 } else if (attr_mask & IB_QP_PATH_MTU) {
1275 if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) {
1276 pr_err("path MTU (%u) is invalid\n",
1277 attr->path_mtu);
1278 goto out;
1279 }
1280 context->mtu_msgmax = (attr->path_mtu << 5) |
1281 ilog2(dev->dev->caps.max_msg_sz);
1282 }
1283
1284 if (qp->rq.wqe_cnt)
1285 context->rq_size_stride = ilog2(qp->rq.wqe_cnt) << 3;
1286 context->rq_size_stride |= qp->rq.wqe_shift - 4;
1287
1288 if (qp->sq.wqe_cnt)
1289 context->sq_size_stride = ilog2(qp->sq.wqe_cnt) << 3;
1290 context->sq_size_stride |= qp->sq.wqe_shift - 4;
1291
1292 if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
1293 context->sq_size_stride |= !!qp->sq_no_prefetch << 7;
1294 context->xrcd = cpu_to_be32((u32) qp->xrcdn);
1295 if (ibqp->qp_type == IB_QPT_RAW_PACKET)
1296 context->param3 |= cpu_to_be32(1 << 30);
1297 }
1298
1299 if (qp->ibqp.uobject)
1300 context->usr_page = cpu_to_be32(to_mucontext(ibqp->uobject->context)->uar.index);
1301 else
1302 context->usr_page = cpu_to_be32(dev->priv_uar.index);
1303
1304 if (attr_mask & IB_QP_DEST_QPN)
1305 context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
1306
1307 if (attr_mask & IB_QP_PORT) {
1308 if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD &&
1309 !(attr_mask & IB_QP_AV)) {
1310 mlx4_set_sched(&context->pri_path, attr->port_num);
1311 optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE;
1312 }
1313 }
1314
1315 if (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) {
1316 if (dev->counters[qp->port - 1] != -1) {
1317 context->pri_path.counter_index =
1318 dev->counters[qp->port - 1];
1319 optpar |= MLX4_QP_OPTPAR_COUNTER_INDEX;
1320 } else
1321 context->pri_path.counter_index = 0xff;
1322 }
1323
1324 if (attr_mask & IB_QP_PKEY_INDEX) {
1325 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1326 context->pri_path.disable_pkey_check = 0x40;
1327 context->pri_path.pkey_index = attr->pkey_index;
1328 optpar |= MLX4_QP_OPTPAR_PKEY_INDEX;
1329 }
1330
1331 if (attr_mask & IB_QP_AV) {
1332 if (mlx4_set_path(dev, &attr->ah_attr, &context->pri_path,
1333 attr_mask & IB_QP_PORT ?
1334 attr->port_num : qp->port))
1335 goto out;
1336
1337 optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH |
1338 MLX4_QP_OPTPAR_SCHED_QUEUE);
1339 }
1340
1341 if (attr_mask & IB_QP_TIMEOUT) {
1342 context->pri_path.ackto |= attr->timeout << 3;
1343 optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT;
1344 }
1345
1346 if (attr_mask & IB_QP_ALT_PATH) {
1347 if (attr->alt_port_num == 0 ||
1348 attr->alt_port_num > dev->dev->caps.num_ports)
1349 goto out;
1350
1351 if (attr->alt_pkey_index >=
1352 dev->dev->caps.pkey_table_len[attr->alt_port_num])
1353 goto out;
1354
1355 if (mlx4_set_path(dev, &attr->alt_ah_attr, &context->alt_path,
1356 attr->alt_port_num))
1357 goto out;
1358
1359 context->alt_path.pkey_index = attr->alt_pkey_index;
1360 context->alt_path.ackto = attr->alt_timeout << 3;
1361 optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH;
1362 }
1363
1364 pd = get_pd(qp);
1365 get_cqs(qp, &send_cq, &recv_cq);
1366 context->pd = cpu_to_be32(pd->pdn);
1367 context->cqn_send = cpu_to_be32(send_cq->mcq.cqn);
1368 context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn);
1369 context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28);
1370
1371 /* Set "fast registration enabled" for all kernel QPs */
1372 if (!qp->ibqp.uobject)
1373 context->params1 |= cpu_to_be32(1 << 11);
1374
1375 if (attr_mask & IB_QP_RNR_RETRY) {
1376 context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
1377 optpar |= MLX4_QP_OPTPAR_RNR_RETRY;
1378 }
1379
1380 if (attr_mask & IB_QP_RETRY_CNT) {
1381 context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
1382 optpar |= MLX4_QP_OPTPAR_RETRY_COUNT;
1383 }
1384
1385 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1386 if (attr->max_rd_atomic)
1387 context->params1 |=
1388 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
1389 optpar |= MLX4_QP_OPTPAR_SRA_MAX;
1390 }
1391
1392 if (attr_mask & IB_QP_SQ_PSN)
1393 context->next_send_psn = cpu_to_be32(attr->sq_psn);
1394
1395 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1396 if (attr->max_dest_rd_atomic)
1397 context->params2 |=
1398 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
1399 optpar |= MLX4_QP_OPTPAR_RRA_MAX;
1400 }
1401
1402 if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) {
1403 context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask);
1404 optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE;
1405 }
1406
1407 if (ibqp->srq)
1408 context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC);
1409
1410 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
1411 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
1412 optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT;
1413 }
1414 if (attr_mask & IB_QP_RQ_PSN)
1415 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
1416
1417 /* proxy and tunnel qp qkeys will be changed in modify-qp wrappers */
1418 if (attr_mask & IB_QP_QKEY) {
1419 if (qp->mlx4_ib_qp_type &
1420 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))
1421 context->qkey = cpu_to_be32(IB_QP_SET_QKEY);
1422 else {
1423 if (mlx4_is_mfunc(dev->dev) &&
1424 !(qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) &&
1425 (attr->qkey & MLX4_RESERVED_QKEY_MASK) ==
1426 MLX4_RESERVED_QKEY_BASE) {
1427 pr_err("Cannot use reserved QKEY"
1428 " 0x%x (range 0xffff0000..0xffffffff"
1429 " is reserved)\n", attr->qkey);
1430 err = -EINVAL;
1431 goto out;
1432 }
1433 context->qkey = cpu_to_be32(attr->qkey);
1434 }
1435 optpar |= MLX4_QP_OPTPAR_Q_KEY;
1436 }
1437
1438 if (ibqp->srq)
1439 context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn);
1440
1441 if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1442 context->db_rec_addr = cpu_to_be64(qp->db.dma);
1443
1444 if (cur_state == IB_QPS_INIT &&
1445 new_state == IB_QPS_RTR &&
1446 (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
1447 ibqp->qp_type == IB_QPT_UD ||
1448 ibqp->qp_type == IB_QPT_RAW_PACKET)) {
1449 context->pri_path.sched_queue = (qp->port - 1) << 6;
1450 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
1451 qp->mlx4_ib_qp_type &
1452 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) {
1453 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE;
1454 if (qp->mlx4_ib_qp_type != MLX4_IB_QPT_SMI)
1455 context->pri_path.fl = 0x80;
1456 } else {
1457 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1458 context->pri_path.fl = 0x80;
1459 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE;
1460 }
1461 }
1462
1463 if (qp->ibqp.qp_type == IB_QPT_RAW_PACKET)
1464 context->pri_path.ackto = (context->pri_path.ackto & 0xf8) |
1465 MLX4_IB_LINK_TYPE_ETH;
1466
1467 if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD &&
1468 attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
1469 sqd_event = 1;
1470 else
1471 sqd_event = 0;
1472
1473 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1474 context->rlkey |= (1 << 4);
1475
1476 /*
1477 * Before passing a kernel QP to the HW, make sure that the
1478 * ownership bits of the send queue are set and the SQ
1479 * headroom is stamped so that the hardware doesn't start
1480 * processing stale work requests.
1481 */
1482 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
1483 struct mlx4_wqe_ctrl_seg *ctrl;
1484 int i;
1485
1486 for (i = 0; i < qp->sq.wqe_cnt; ++i) {
1487 ctrl = get_send_wqe(qp, i);
1488 ctrl->owner_opcode = cpu_to_be32(1 << 31);
1489 if (qp->sq_max_wqes_per_wr == 1)
1490 ctrl->fence_size = 1 << (qp->sq.wqe_shift - 4);
1491
1492 stamp_send_wqe(qp, i, 1 << qp->sq.wqe_shift);
1493 }
1494 }
1495
1496 err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state),
1497 to_mlx4_state(new_state), context, optpar,
1498 sqd_event, &qp->mqp);
1499 if (err)
1500 goto out;
1501
1502 qp->state = new_state;
1503
1504 if (attr_mask & IB_QP_ACCESS_FLAGS)
1505 qp->atomic_rd_en = attr->qp_access_flags;
1506 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1507 qp->resp_depth = attr->max_dest_rd_atomic;
1508 if (attr_mask & IB_QP_PORT) {
1509 qp->port = attr->port_num;
1510 update_mcg_macs(dev, qp);
1511 }
1512 if (attr_mask & IB_QP_ALT_PATH)
1513 qp->alt_port = attr->alt_port_num;
1514
1515 if (is_sqp(dev, qp))
1516 store_sqp_attrs(to_msqp(qp), attr, attr_mask);
1517
1518 /*
1519 * If we moved QP0 to RTR, bring the IB link up; if we moved
1520 * QP0 to RESET or ERROR, bring the link back down.
1521 */
1522 if (is_qp0(dev, qp)) {
1523 if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR)
1524 if (mlx4_INIT_PORT(dev->dev, qp->port))
1525 pr_warn("INIT_PORT failed for port %d\n",
1526 qp->port);
1527
1528 if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR &&
1529 (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR))
1530 mlx4_CLOSE_PORT(dev->dev, qp->port);
1531 }
1532
1533 /*
1534 * If we moved a kernel QP to RESET, clean up all old CQ
1535 * entries and reinitialize the QP.
1536 */
1537 if (new_state == IB_QPS_RESET && !ibqp->uobject) {
1538 mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
1539 ibqp->srq ? to_msrq(ibqp->srq): NULL);
1540 if (send_cq != recv_cq)
1541 mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1542
1543 qp->rq.head = 0;
1544 qp->rq.tail = 0;
1545 qp->sq.head = 0;
1546 qp->sq.tail = 0;
1547 qp->sq_next_wqe = 0;
1548 if (qp->rq.wqe_cnt)
1549 *qp->db.db = 0;
1550 }
1551
1552 out:
1553 kfree(context);
1554 return err;
1555 }
1556
1557 int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1558 int attr_mask, struct ib_udata *udata)
1559 {
1560 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
1561 struct mlx4_ib_qp *qp = to_mqp(ibqp);
1562 enum ib_qp_state cur_state, new_state;
1563 int err = -EINVAL;
1564
1565 mutex_lock(&qp->mutex);
1566
1567 cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
1568 new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
1569
1570 if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, attr_mask)) {
1571 pr_debug("qpn 0x%x: invalid attribute mask specified "
1572 "for transition %d to %d. qp_type %d,"
1573 " attr_mask 0x%x\n",
1574 ibqp->qp_num, cur_state, new_state,
1575 ibqp->qp_type, attr_mask);
1576 goto out;
1577 }
1578
1579 if ((attr_mask & IB_QP_PORT) &&
1580 (attr->port_num == 0 || attr->port_num > dev->num_ports)) {
1581 pr_debug("qpn 0x%x: invalid port number (%d) specified "
1582 "for transition %d to %d. qp_type %d\n",
1583 ibqp->qp_num, attr->port_num, cur_state,
1584 new_state, ibqp->qp_type);
1585 goto out;
1586 }
1587
1588 if ((attr_mask & IB_QP_PORT) && (ibqp->qp_type == IB_QPT_RAW_PACKET) &&
1589 (rdma_port_get_link_layer(&dev->ib_dev, attr->port_num) !=
1590 IB_LINK_LAYER_ETHERNET))
1591 goto out;
1592
1593 if (attr_mask & IB_QP_PKEY_INDEX) {
1594 int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1595 if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) {
1596 pr_debug("qpn 0x%x: invalid pkey index (%d) specified "
1597 "for transition %d to %d. qp_type %d\n",
1598 ibqp->qp_num, attr->pkey_index, cur_state,
1599 new_state, ibqp->qp_type);
1600 goto out;
1601 }
1602 }
1603
1604 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
1605 attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) {
1606 pr_debug("qpn 0x%x: max_rd_atomic (%d) too large. "
1607 "Transition %d to %d. qp_type %d\n",
1608 ibqp->qp_num, attr->max_rd_atomic, cur_state,
1609 new_state, ibqp->qp_type);
1610 goto out;
1611 }
1612
1613 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
1614 attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) {
1615 pr_debug("qpn 0x%x: max_dest_rd_atomic (%d) too large. "
1616 "Transition %d to %d. qp_type %d\n",
1617 ibqp->qp_num, attr->max_dest_rd_atomic, cur_state,
1618 new_state, ibqp->qp_type);
1619 goto out;
1620 }
1621
1622 if (cur_state == new_state && cur_state == IB_QPS_RESET) {
1623 err = 0;
1624 goto out;
1625 }
1626
1627 err = __mlx4_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state);
1628
1629 out:
1630 mutex_unlock(&qp->mutex);
1631 return err;
1632 }
1633
1634 static int build_sriov_qp0_header(struct mlx4_ib_sqp *sqp,
1635 struct ib_send_wr *wr,
1636 void *wqe, unsigned *mlx_seg_len)
1637 {
1638 struct mlx4_ib_dev *mdev = to_mdev(sqp->qp.ibqp.device);
1639 struct ib_device *ib_dev = &mdev->ib_dev;
1640 struct mlx4_wqe_mlx_seg *mlx = wqe;
1641 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
1642 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
1643 u16 pkey;
1644 u32 qkey;
1645 int send_size;
1646 int header_size;
1647 int spc;
1648 int i;
1649
1650 if (wr->opcode != IB_WR_SEND)
1651 return -EINVAL;
1652
1653 send_size = 0;
1654
1655 for (i = 0; i < wr->num_sge; ++i)
1656 send_size += wr->sg_list[i].length;
1657
1658 /* for proxy-qp0 sends, need to add in size of tunnel header */
1659 /* for tunnel-qp0 sends, tunnel header is already in s/g list */
1660 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER)
1661 send_size += sizeof (struct mlx4_ib_tunnel_header);
1662
1663 ib_ud_header_init(send_size, 1, 0, 0, 0, 0, &sqp->ud_header);
1664
1665 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) {
1666 sqp->ud_header.lrh.service_level =
1667 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
1668 sqp->ud_header.lrh.destination_lid =
1669 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
1670 sqp->ud_header.lrh.source_lid =
1671 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
1672 }
1673
1674 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
1675
1676 /* force loopback */
1677 mlx->flags |= cpu_to_be32(MLX4_WQE_MLX_VL15 | 0x1 | MLX4_WQE_MLX_SLR);
1678 mlx->rlid = sqp->ud_header.lrh.destination_lid;
1679
1680 sqp->ud_header.lrh.virtual_lane = 0;
1681 sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
1682 ib_get_cached_pkey(ib_dev, sqp->qp.port, 0, &pkey);
1683 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
1684 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_TUN_SMI_OWNER)
1685 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
1686 else
1687 sqp->ud_header.bth.destination_qpn =
1688 cpu_to_be32(mdev->dev->caps.qp0_tunnel[sqp->qp.port - 1]);
1689
1690 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
1691 if (mlx4_get_parav_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
1692 return -EINVAL;
1693 sqp->ud_header.deth.qkey = cpu_to_be32(qkey);
1694 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.mqp.qpn);
1695
1696 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
1697 sqp->ud_header.immediate_present = 0;
1698
1699 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
1700
1701 /*
1702 * Inline data segments may not cross a 64 byte boundary. If
1703 * our UD header is bigger than the space available up to the
1704 * next 64 byte boundary in the WQE, use two inline data
1705 * segments to hold the UD header.
1706 */
1707 spc = MLX4_INLINE_ALIGN -
1708 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
1709 if (header_size <= spc) {
1710 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
1711 memcpy(inl + 1, sqp->header_buf, header_size);
1712 i = 1;
1713 } else {
1714 inl->byte_count = cpu_to_be32(1 << 31 | spc);
1715 memcpy(inl + 1, sqp->header_buf, spc);
1716
1717 inl = (void *) (inl + 1) + spc;
1718 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
1719 /*
1720 * Need a barrier here to make sure all the data is
1721 * visible before the byte_count field is set.
1722 * Otherwise the HCA prefetcher could grab the 64-byte
1723 * chunk with this inline segment and get a valid (!=
1724 * 0xffffffff) byte count but stale data, and end up
1725 * generating a packet with bad headers.
1726 *
1727 * The first inline segment's byte_count field doesn't
1728 * need a barrier, because it comes after a
1729 * control/MLX segment and therefore is at an offset
1730 * of 16 mod 64.
1731 */
1732 wmb();
1733 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
1734 i = 2;
1735 }
1736
1737 *mlx_seg_len =
1738 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
1739 return 0;
1740 }
1741
1742 static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
1743 void *wqe, unsigned *mlx_seg_len)
1744 {
1745 struct ib_device *ib_dev = sqp->qp.ibqp.device;
1746 struct mlx4_wqe_mlx_seg *mlx = wqe;
1747 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
1748 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
1749 struct net_device *ndev;
1750 union ib_gid sgid;
1751 u16 pkey;
1752 int send_size;
1753 int header_size;
1754 int spc;
1755 int i;
1756 int err = 0;
1757 u16 vlan = 0xffff;
1758 bool is_eth;
1759 bool is_vlan = false;
1760 bool is_grh;
1761
1762 send_size = 0;
1763 for (i = 0; i < wr->num_sge; ++i)
1764 send_size += wr->sg_list[i].length;
1765
1766 is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET;
1767 is_grh = mlx4_ib_ah_grh_present(ah);
1768 if (is_eth) {
1769 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
1770 /* When multi-function is enabled, the ib_core gid
1771 * indexes don't necessarily match the hw ones, so
1772 * we must use our own cache */
1773 sgid.global.subnet_prefix =
1774 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
1775 subnet_prefix;
1776 sgid.global.interface_id =
1777 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
1778 guid_cache[ah->av.ib.gid_index];
1779 } else {
1780 err = ib_get_cached_gid(ib_dev,
1781 be32_to_cpu(ah->av.ib.port_pd) >> 24,
1782 ah->av.ib.gid_index, &sgid);
1783 if (err)
1784 return err;
1785 }
1786
1787 vlan = rdma_get_vlan_id(&sgid);
1788 is_vlan = vlan < 0x1000;
1789 }
1790 ib_ud_header_init(send_size, !is_eth, is_eth, is_vlan, is_grh, 0, &sqp->ud_header);
1791
1792 if (!is_eth) {
1793 sqp->ud_header.lrh.service_level =
1794 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
1795 sqp->ud_header.lrh.destination_lid = ah->av.ib.dlid;
1796 sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f);
1797 }
1798
1799 if (is_grh) {
1800 sqp->ud_header.grh.traffic_class =
1801 (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff;
1802 sqp->ud_header.grh.flow_label =
1803 ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
1804 sqp->ud_header.grh.hop_limit = ah->av.ib.hop_limit;
1805 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
1806 /* When multi-function is enabled, the ib_core gid
1807 * indexes don't necessarily match the hw ones, so
1808 * we must use our own cache */
1809 sqp->ud_header.grh.source_gid.global.subnet_prefix =
1810 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
1811 subnet_prefix;
1812 sqp->ud_header.grh.source_gid.global.interface_id =
1813 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
1814 guid_cache[ah->av.ib.gid_index];
1815 } else
1816 ib_get_cached_gid(ib_dev,
1817 be32_to_cpu(ah->av.ib.port_pd) >> 24,
1818 ah->av.ib.gid_index,
1819 &sqp->ud_header.grh.source_gid);
1820 memcpy(sqp->ud_header.grh.destination_gid.raw,
1821 ah->av.ib.dgid, 16);
1822 }
1823
1824 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
1825
1826 if (!is_eth) {
1827 mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) |
1828 (sqp->ud_header.lrh.destination_lid ==
1829 IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) |
1830 (sqp->ud_header.lrh.service_level << 8));
1831 if (ah->av.ib.port_pd & cpu_to_be32(0x80000000))
1832 mlx->flags |= cpu_to_be32(0x1); /* force loopback */
1833 mlx->rlid = sqp->ud_header.lrh.destination_lid;
1834 }
1835
1836 switch (wr->opcode) {
1837 case IB_WR_SEND:
1838 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
1839 sqp->ud_header.immediate_present = 0;
1840 break;
1841 case IB_WR_SEND_WITH_IMM:
1842 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
1843 sqp->ud_header.immediate_present = 1;
1844 sqp->ud_header.immediate_data = wr->ex.imm_data;
1845 break;
1846 default:
1847 return -EINVAL;
1848 }
1849
1850 if (is_eth) {
1851 u8 *smac;
1852 u16 pcp = (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 29) << 13;
1853
1854 mlx->sched_prio = cpu_to_be16(pcp);
1855
1856 memcpy(sqp->ud_header.eth.dmac_h, ah->av.eth.mac, 6);
1857 /* FIXME: cache smac value? */
1858 ndev = to_mdev(sqp->qp.ibqp.device)->iboe.netdevs[sqp->qp.port - 1];
1859 if (!ndev)
1860 return -ENODEV;
1861 smac = ndev->dev_addr;
1862 memcpy(sqp->ud_header.eth.smac_h, smac, 6);
1863 if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6))
1864 mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
1865 if (!is_vlan) {
1866 sqp->ud_header.eth.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
1867 } else {
1868 sqp->ud_header.vlan.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
1869 sqp->ud_header.vlan.tag = cpu_to_be16(vlan | pcp);
1870 }
1871 } else {
1872 sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0;
1873 if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
1874 sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
1875 }
1876 sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
1877 if (!sqp->qp.ibqp.qp_num)
1878 ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey);
1879 else
1880 ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey);
1881 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
1882 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
1883 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
1884 sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
1885 sqp->qkey : wr->wr.ud.remote_qkey);
1886 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
1887
1888 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
1889
1890 if (0) {
1891 pr_err("built UD header of size %d:\n", header_size);
1892 for (i = 0; i < header_size / 4; ++i) {
1893 if (i % 8 == 0)
1894 pr_err(" [%02x] ", i * 4);
1895 pr_cont(" %08x",
1896 be32_to_cpu(((__be32 *) sqp->header_buf)[i]));
1897 if ((i + 1) % 8 == 0)
1898 pr_cont("\n");
1899 }
1900 pr_err("\n");
1901 }
1902
1903 /*
1904 * Inline data segments may not cross a 64 byte boundary. If
1905 * our UD header is bigger than the space available up to the
1906 * next 64 byte boundary in the WQE, use two inline data
1907 * segments to hold the UD header.
1908 */
1909 spc = MLX4_INLINE_ALIGN -
1910 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
1911 if (header_size <= spc) {
1912 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
1913 memcpy(inl + 1, sqp->header_buf, header_size);
1914 i = 1;
1915 } else {
1916 inl->byte_count = cpu_to_be32(1 << 31 | spc);
1917 memcpy(inl + 1, sqp->header_buf, spc);
1918
1919 inl = (void *) (inl + 1) + spc;
1920 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
1921 /*
1922 * Need a barrier here to make sure all the data is
1923 * visible before the byte_count field is set.
1924 * Otherwise the HCA prefetcher could grab the 64-byte
1925 * chunk with this inline segment and get a valid (!=
1926 * 0xffffffff) byte count but stale data, and end up
1927 * generating a packet with bad headers.
1928 *
1929 * The first inline segment's byte_count field doesn't
1930 * need a barrier, because it comes after a
1931 * control/MLX segment and therefore is at an offset
1932 * of 16 mod 64.
1933 */
1934 wmb();
1935 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
1936 i = 2;
1937 }
1938
1939 *mlx_seg_len =
1940 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
1941 return 0;
1942 }
1943
1944 static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
1945 {
1946 unsigned cur;
1947 struct mlx4_ib_cq *cq;
1948
1949 cur = wq->head - wq->tail;
1950 if (likely(cur + nreq < wq->max_post))
1951 return 0;
1952
1953 cq = to_mcq(ib_cq);
1954 spin_lock(&cq->lock);
1955 cur = wq->head - wq->tail;
1956 spin_unlock(&cq->lock);
1957
1958 return cur + nreq >= wq->max_post;
1959 }
1960
1961 static __be32 convert_access(int acc)
1962 {
1963 return (acc & IB_ACCESS_REMOTE_ATOMIC ?
1964 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC) : 0) |
1965 (acc & IB_ACCESS_REMOTE_WRITE ?
1966 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE) : 0) |
1967 (acc & IB_ACCESS_REMOTE_READ ?
1968 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ) : 0) |
1969 (acc & IB_ACCESS_LOCAL_WRITE ? cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_WRITE) : 0) |
1970 cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_READ);
1971 }
1972
1973 static void set_fmr_seg(struct mlx4_wqe_fmr_seg *fseg, struct ib_send_wr *wr)
1974 {
1975 struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(wr->wr.fast_reg.page_list);
1976 int i;
1977
1978 for (i = 0; i < wr->wr.fast_reg.page_list_len; ++i)
1979 mfrpl->mapped_page_list[i] =
1980 cpu_to_be64(wr->wr.fast_reg.page_list->page_list[i] |
1981 MLX4_MTT_FLAG_PRESENT);
1982
1983 fseg->flags = convert_access(wr->wr.fast_reg.access_flags);
1984 fseg->mem_key = cpu_to_be32(wr->wr.fast_reg.rkey);
1985 fseg->buf_list = cpu_to_be64(mfrpl->map);
1986 fseg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start);
1987 fseg->reg_len = cpu_to_be64(wr->wr.fast_reg.length);
1988 fseg->offset = 0; /* XXX -- is this just for ZBVA? */
1989 fseg->page_size = cpu_to_be32(wr->wr.fast_reg.page_shift);
1990 fseg->reserved[0] = 0;
1991 fseg->reserved[1] = 0;
1992 }
1993
1994 static void set_bind_seg(struct mlx4_wqe_bind_seg *bseg, struct ib_send_wr *wr)
1995 {
1996 bseg->flags1 =
1997 convert_access(wr->wr.bind_mw.bind_info.mw_access_flags) &
1998 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ |
1999 MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE |
2000 MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC);
2001 bseg->flags2 = 0;
2002 if (wr->wr.bind_mw.mw->type == IB_MW_TYPE_2)
2003 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_TYPE_2);
2004 if (wr->wr.bind_mw.bind_info.mw_access_flags & IB_ZERO_BASED)
2005 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_ZERO_BASED);
2006 bseg->new_rkey = cpu_to_be32(wr->wr.bind_mw.rkey);
2007 bseg->lkey = cpu_to_be32(wr->wr.bind_mw.bind_info.mr->lkey);
2008 bseg->addr = cpu_to_be64(wr->wr.bind_mw.bind_info.addr);
2009 bseg->length = cpu_to_be64(wr->wr.bind_mw.bind_info.length);
2010 }
2011
2012 static void set_local_inv_seg(struct mlx4_wqe_local_inval_seg *iseg, u32 rkey)
2013 {
2014 memset(iseg, 0, sizeof(*iseg));
2015 iseg->mem_key = cpu_to_be32(rkey);
2016 }
2017
2018 static __always_inline void set_raddr_seg(struct mlx4_wqe_raddr_seg *rseg,
2019 u64 remote_addr, u32 rkey)
2020 {
2021 rseg->raddr = cpu_to_be64(remote_addr);
2022 rseg->rkey = cpu_to_be32(rkey);
2023 rseg->reserved = 0;
2024 }
2025
2026 static void set_atomic_seg(struct mlx4_wqe_atomic_seg *aseg, struct ib_send_wr *wr)
2027 {
2028 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
2029 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
2030 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
2031 } else if (wr->opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) {
2032 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2033 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2034 } else {
2035 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2036 aseg->compare = 0;
2037 }
2038
2039 }
2040
2041 static void set_masked_atomic_seg(struct mlx4_wqe_masked_atomic_seg *aseg,
2042 struct ib_send_wr *wr)
2043 {
2044 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
2045 aseg->swap_add_mask = cpu_to_be64(wr->wr.atomic.swap_mask);
2046 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
2047 aseg->compare_mask = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2048 }
2049
2050 static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg,
2051 struct ib_send_wr *wr)
2052 {
2053 memcpy(dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av));
2054 dseg->dqpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2055 dseg->qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2056 dseg->vlan = to_mah(wr->wr.ud.ah)->av.eth.vlan;
2057 memcpy(dseg->mac, to_mah(wr->wr.ud.ah)->av.eth.mac, 6);
2058 }
2059
2060 static void set_tunnel_datagram_seg(struct mlx4_ib_dev *dev,
2061 struct mlx4_wqe_datagram_seg *dseg,
2062 struct ib_send_wr *wr, enum ib_qp_type qpt)
2063 {
2064 union mlx4_ext_av *av = &to_mah(wr->wr.ud.ah)->av;
2065 struct mlx4_av sqp_av = {0};
2066 int port = *((u8 *) &av->ib.port_pd) & 0x3;
2067
2068 /* force loopback */
2069 sqp_av.port_pd = av->ib.port_pd | cpu_to_be32(0x80000000);
2070 sqp_av.g_slid = av->ib.g_slid & 0x7f; /* no GRH */
2071 sqp_av.sl_tclass_flowlabel = av->ib.sl_tclass_flowlabel &
2072 cpu_to_be32(0xf0000000);
2073
2074 memcpy(dseg->av, &sqp_av, sizeof (struct mlx4_av));
2075 /* This function used only for sending on QP1 proxies */
2076 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp1_tunnel[port - 1]);
2077 /* Use QKEY from the QP context, which is set by master */
2078 dseg->qkey = cpu_to_be32(IB_QP_SET_QKEY);
2079 }
2080
2081 static void build_tunnel_header(struct ib_send_wr *wr, void *wqe, unsigned *mlx_seg_len)
2082 {
2083 struct mlx4_wqe_inline_seg *inl = wqe;
2084 struct mlx4_ib_tunnel_header hdr;
2085 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2086 int spc;
2087 int i;
2088
2089 memcpy(&hdr.av, &ah->av, sizeof hdr.av);
2090 hdr.remote_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2091 hdr.pkey_index = cpu_to_be16(wr->wr.ud.pkey_index);
2092 hdr.qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2093
2094 spc = MLX4_INLINE_ALIGN -
2095 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2096 if (sizeof (hdr) <= spc) {
2097 memcpy(inl + 1, &hdr, sizeof (hdr));
2098 wmb();
2099 inl->byte_count = cpu_to_be32(1 << 31 | sizeof (hdr));
2100 i = 1;
2101 } else {
2102 memcpy(inl + 1, &hdr, spc);
2103 wmb();
2104 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2105
2106 inl = (void *) (inl + 1) + spc;
2107 memcpy(inl + 1, (void *) &hdr + spc, sizeof (hdr) - spc);
2108 wmb();
2109 inl->byte_count = cpu_to_be32(1 << 31 | (sizeof (hdr) - spc));
2110 i = 2;
2111 }
2112
2113 *mlx_seg_len =
2114 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + sizeof (hdr), 16);
2115 }
2116
2117 static void set_mlx_icrc_seg(void *dseg)
2118 {
2119 u32 *t = dseg;
2120 struct mlx4_wqe_inline_seg *iseg = dseg;
2121
2122 t[1] = 0;
2123
2124 /*
2125 * Need a barrier here before writing the byte_count field to
2126 * make sure that all the data is visible before the
2127 * byte_count field is set. Otherwise, if the segment begins
2128 * a new cacheline, the HCA prefetcher could grab the 64-byte
2129 * chunk and get a valid (!= * 0xffffffff) byte count but
2130 * stale data, and end up sending the wrong data.
2131 */
2132 wmb();
2133
2134 iseg->byte_count = cpu_to_be32((1 << 31) | 4);
2135 }
2136
2137 static void set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2138 {
2139 dseg->lkey = cpu_to_be32(sg->lkey);
2140 dseg->addr = cpu_to_be64(sg->addr);
2141
2142 /*
2143 * Need a barrier here before writing the byte_count field to
2144 * make sure that all the data is visible before the
2145 * byte_count field is set. Otherwise, if the segment begins
2146 * a new cacheline, the HCA prefetcher could grab the 64-byte
2147 * chunk and get a valid (!= * 0xffffffff) byte count but
2148 * stale data, and end up sending the wrong data.
2149 */
2150 wmb();
2151
2152 dseg->byte_count = cpu_to_be32(sg->length);
2153 }
2154
2155 static void __set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2156 {
2157 dseg->byte_count = cpu_to_be32(sg->length);
2158 dseg->lkey = cpu_to_be32(sg->lkey);
2159 dseg->addr = cpu_to_be64(sg->addr);
2160 }
2161
2162 static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe, struct ib_send_wr *wr,
2163 struct mlx4_ib_qp *qp, unsigned *lso_seg_len,
2164 __be32 *lso_hdr_sz, __be32 *blh)
2165 {
2166 unsigned halign = ALIGN(sizeof *wqe + wr->wr.ud.hlen, 16);
2167
2168 if (unlikely(halign > MLX4_IB_CACHE_LINE_SIZE))
2169 *blh = cpu_to_be32(1 << 6);
2170
2171 if (unlikely(!(qp->flags & MLX4_IB_QP_LSO) &&
2172 wr->num_sge > qp->sq.max_gs - (halign >> 4)))
2173 return -EINVAL;
2174
2175 memcpy(wqe->header, wr->wr.ud.header, wr->wr.ud.hlen);
2176
2177 *lso_hdr_sz = cpu_to_be32((wr->wr.ud.mss - wr->wr.ud.hlen) << 16 |
2178 wr->wr.ud.hlen);
2179 *lso_seg_len = halign;
2180 return 0;
2181 }
2182
2183 static __be32 send_ieth(struct ib_send_wr *wr)
2184 {
2185 switch (wr->opcode) {
2186 case IB_WR_SEND_WITH_IMM:
2187 case IB_WR_RDMA_WRITE_WITH_IMM:
2188 return wr->ex.imm_data;
2189
2190 case IB_WR_SEND_WITH_INV:
2191 return cpu_to_be32(wr->ex.invalidate_rkey);
2192
2193 default:
2194 return 0;
2195 }
2196 }
2197
2198 static void add_zero_len_inline(void *wqe)
2199 {
2200 struct mlx4_wqe_inline_seg *inl = wqe;
2201 memset(wqe, 0, 16);
2202 inl->byte_count = cpu_to_be32(1 << 31);
2203 }
2204
2205 int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
2206 struct ib_send_wr **bad_wr)
2207 {
2208 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2209 void *wqe;
2210 struct mlx4_wqe_ctrl_seg *ctrl;
2211 struct mlx4_wqe_data_seg *dseg;
2212 unsigned long flags;
2213 int nreq;
2214 int err = 0;
2215 unsigned ind;
2216 int uninitialized_var(stamp);
2217 int uninitialized_var(size);
2218 unsigned uninitialized_var(seglen);
2219 __be32 dummy;
2220 __be32 *lso_wqe;
2221 __be32 uninitialized_var(lso_hdr_sz);
2222 __be32 blh;
2223 int i;
2224
2225 spin_lock_irqsave(&qp->sq.lock, flags);
2226
2227 ind = qp->sq_next_wqe;
2228
2229 for (nreq = 0; wr; ++nreq, wr = wr->next) {
2230 lso_wqe = &dummy;
2231 blh = 0;
2232
2233 if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
2234 err = -ENOMEM;
2235 *bad_wr = wr;
2236 goto out;
2237 }
2238
2239 if (unlikely(wr->num_sge > qp->sq.max_gs)) {
2240 err = -EINVAL;
2241 *bad_wr = wr;
2242 goto out;
2243 }
2244
2245 ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
2246 qp->sq.wrid[(qp->sq.head + nreq) & (qp->sq.wqe_cnt - 1)] = wr->wr_id;
2247
2248 ctrl->srcrb_flags =
2249 (wr->send_flags & IB_SEND_SIGNALED ?
2250 cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) |
2251 (wr->send_flags & IB_SEND_SOLICITED ?
2252 cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) |
2253 ((wr->send_flags & IB_SEND_IP_CSUM) ?
2254 cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
2255 MLX4_WQE_CTRL_TCP_UDP_CSUM) : 0) |
2256 qp->sq_signal_bits;
2257
2258 ctrl->imm = send_ieth(wr);
2259
2260 wqe += sizeof *ctrl;
2261 size = sizeof *ctrl / 16;
2262
2263 switch (qp->mlx4_ib_qp_type) {
2264 case MLX4_IB_QPT_RC:
2265 case MLX4_IB_QPT_UC:
2266 switch (wr->opcode) {
2267 case IB_WR_ATOMIC_CMP_AND_SWP:
2268 case IB_WR_ATOMIC_FETCH_AND_ADD:
2269 case IB_WR_MASKED_ATOMIC_FETCH_AND_ADD:
2270 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2271 wr->wr.atomic.rkey);
2272 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2273
2274 set_atomic_seg(wqe, wr);
2275 wqe += sizeof (struct mlx4_wqe_atomic_seg);
2276
2277 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2278 sizeof (struct mlx4_wqe_atomic_seg)) / 16;
2279
2280 break;
2281
2282 case IB_WR_MASKED_ATOMIC_CMP_AND_SWP:
2283 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2284 wr->wr.atomic.rkey);
2285 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2286
2287 set_masked_atomic_seg(wqe, wr);
2288 wqe += sizeof (struct mlx4_wqe_masked_atomic_seg);
2289
2290 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2291 sizeof (struct mlx4_wqe_masked_atomic_seg)) / 16;
2292
2293 break;
2294
2295 case IB_WR_RDMA_READ:
2296 case IB_WR_RDMA_WRITE:
2297 case IB_WR_RDMA_WRITE_WITH_IMM:
2298 set_raddr_seg(wqe, wr->wr.rdma.remote_addr,
2299 wr->wr.rdma.rkey);
2300 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2301 size += sizeof (struct mlx4_wqe_raddr_seg) / 16;
2302 break;
2303
2304 case IB_WR_LOCAL_INV:
2305 ctrl->srcrb_flags |=
2306 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2307 set_local_inv_seg(wqe, wr->ex.invalidate_rkey);
2308 wqe += sizeof (struct mlx4_wqe_local_inval_seg);
2309 size += sizeof (struct mlx4_wqe_local_inval_seg) / 16;
2310 break;
2311
2312 case IB_WR_FAST_REG_MR:
2313 ctrl->srcrb_flags |=
2314 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2315 set_fmr_seg(wqe, wr);
2316 wqe += sizeof (struct mlx4_wqe_fmr_seg);
2317 size += sizeof (struct mlx4_wqe_fmr_seg) / 16;
2318 break;
2319
2320 case IB_WR_BIND_MW:
2321 ctrl->srcrb_flags |=
2322 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2323 set_bind_seg(wqe, wr);
2324 wqe += sizeof(struct mlx4_wqe_bind_seg);
2325 size += sizeof(struct mlx4_wqe_bind_seg) / 16;
2326 break;
2327 default:
2328 /* No extra segments required for sends */
2329 break;
2330 }
2331 break;
2332
2333 case MLX4_IB_QPT_TUN_SMI_OWNER:
2334 err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2335 if (unlikely(err)) {
2336 *bad_wr = wr;
2337 goto out;
2338 }
2339 wqe += seglen;
2340 size += seglen / 16;
2341 break;
2342 case MLX4_IB_QPT_TUN_SMI:
2343 case MLX4_IB_QPT_TUN_GSI:
2344 /* this is a UD qp used in MAD responses to slaves. */
2345 set_datagram_seg(wqe, wr);
2346 /* set the forced-loopback bit in the data seg av */
2347 *(__be32 *) wqe |= cpu_to_be32(0x80000000);
2348 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2349 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2350 break;
2351 case MLX4_IB_QPT_UD:
2352 set_datagram_seg(wqe, wr);
2353 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2354 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2355
2356 if (wr->opcode == IB_WR_LSO) {
2357 err = build_lso_seg(wqe, wr, qp, &seglen, &lso_hdr_sz, &blh);
2358 if (unlikely(err)) {
2359 *bad_wr = wr;
2360 goto out;
2361 }
2362 lso_wqe = (__be32 *) wqe;
2363 wqe += seglen;
2364 size += seglen / 16;
2365 }
2366 break;
2367
2368 case MLX4_IB_QPT_PROXY_SMI_OWNER:
2369 if (unlikely(!mlx4_is_master(to_mdev(ibqp->device)->dev))) {
2370 err = -ENOSYS;
2371 *bad_wr = wr;
2372 goto out;
2373 }
2374 err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2375 if (unlikely(err)) {
2376 *bad_wr = wr;
2377 goto out;
2378 }
2379 wqe += seglen;
2380 size += seglen / 16;
2381 /* to start tunnel header on a cache-line boundary */
2382 add_zero_len_inline(wqe);
2383 wqe += 16;
2384 size++;
2385 build_tunnel_header(wr, wqe, &seglen);
2386 wqe += seglen;
2387 size += seglen / 16;
2388 break;
2389 case MLX4_IB_QPT_PROXY_SMI:
2390 /* don't allow QP0 sends on guests */
2391 err = -ENOSYS;
2392 *bad_wr = wr;
2393 goto out;
2394 case MLX4_IB_QPT_PROXY_GSI:
2395 /* If we are tunneling special qps, this is a UD qp.
2396 * In this case we first add a UD segment targeting
2397 * the tunnel qp, and then add a header with address
2398 * information */
2399 set_tunnel_datagram_seg(to_mdev(ibqp->device), wqe, wr, ibqp->qp_type);
2400 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2401 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2402 build_tunnel_header(wr, wqe, &seglen);
2403 wqe += seglen;
2404 size += seglen / 16;
2405 break;
2406
2407 case MLX4_IB_QPT_SMI:
2408 case MLX4_IB_QPT_GSI:
2409 err = build_mlx_header(to_msqp(qp), wr, ctrl, &seglen);
2410 if (unlikely(err)) {
2411 *bad_wr = wr;
2412 goto out;
2413 }
2414 wqe += seglen;
2415 size += seglen / 16;
2416 break;
2417
2418 default:
2419 break;
2420 }
2421
2422 /*
2423 * Write data segments in reverse order, so as to
2424 * overwrite cacheline stamp last within each
2425 * cacheline. This avoids issues with WQE
2426 * prefetching.
2427 */
2428
2429 dseg = wqe;
2430 dseg += wr->num_sge - 1;
2431 size += wr->num_sge * (sizeof (struct mlx4_wqe_data_seg) / 16);
2432
2433 /* Add one more inline data segment for ICRC for MLX sends */
2434 if (unlikely(qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
2435 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI ||
2436 qp->mlx4_ib_qp_type &
2437 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))) {
2438 set_mlx_icrc_seg(dseg + 1);
2439 size += sizeof (struct mlx4_wqe_data_seg) / 16;
2440 }
2441
2442 for (i = wr->num_sge - 1; i >= 0; --i, --dseg)
2443 set_data_seg(dseg, wr->sg_list + i);
2444
2445 /*
2446 * Possibly overwrite stamping in cacheline with LSO
2447 * segment only after making sure all data segments
2448 * are written.
2449 */
2450 wmb();
2451 *lso_wqe = lso_hdr_sz;
2452
2453 ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ?
2454 MLX4_WQE_CTRL_FENCE : 0) | size;
2455
2456 /*
2457 * Make sure descriptor is fully written before
2458 * setting ownership bit (because HW can start
2459 * executing as soon as we do).
2460 */
2461 wmb();
2462
2463 if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) {
2464 *bad_wr = wr;
2465 err = -EINVAL;
2466 goto out;
2467 }
2468
2469 ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] |
2470 (ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0) | blh;
2471
2472 stamp = ind + qp->sq_spare_wqes;
2473 ind += DIV_ROUND_UP(size * 16, 1U << qp->sq.wqe_shift);
2474
2475 /*
2476 * We can improve latency by not stamping the last
2477 * send queue WQE until after ringing the doorbell, so
2478 * only stamp here if there are still more WQEs to post.
2479 *
2480 * Same optimization applies to padding with NOP wqe
2481 * in case of WQE shrinking (used to prevent wrap-around
2482 * in the middle of WR).
2483 */
2484 if (wr->next) {
2485 stamp_send_wqe(qp, stamp, size * 16);
2486 ind = pad_wraparound(qp, ind);
2487 }
2488 }
2489
2490 out:
2491 if (likely(nreq)) {
2492 qp->sq.head += nreq;
2493
2494 /*
2495 * Make sure that descriptors are written before
2496 * doorbell record.
2497 */
2498 wmb();
2499
2500 writel(qp->doorbell_qpn,
2501 to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL);
2502
2503 /*
2504 * Make sure doorbells don't leak out of SQ spinlock
2505 * and reach the HCA out of order.
2506 */
2507 mmiowb();
2508
2509 stamp_send_wqe(qp, stamp, size * 16);
2510
2511 ind = pad_wraparound(qp, ind);
2512 qp->sq_next_wqe = ind;
2513 }
2514
2515 spin_unlock_irqrestore(&qp->sq.lock, flags);
2516
2517 return err;
2518 }
2519
2520 int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
2521 struct ib_recv_wr **bad_wr)
2522 {
2523 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2524 struct mlx4_wqe_data_seg *scat;
2525 unsigned long flags;
2526 int err = 0;
2527 int nreq;
2528 int ind;
2529 int max_gs;
2530 int i;
2531
2532 max_gs = qp->rq.max_gs;
2533 spin_lock_irqsave(&qp->rq.lock, flags);
2534
2535 ind = qp->rq.head & (qp->rq.wqe_cnt - 1);
2536
2537 for (nreq = 0; wr; ++nreq, wr = wr->next) {
2538 if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
2539 err = -ENOMEM;
2540 *bad_wr = wr;
2541 goto out;
2542 }
2543
2544 if (unlikely(wr->num_sge > qp->rq.max_gs)) {
2545 err = -EINVAL;
2546 *bad_wr = wr;
2547 goto out;
2548 }
2549
2550 scat = get_recv_wqe(qp, ind);
2551
2552 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
2553 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
2554 ib_dma_sync_single_for_device(ibqp->device,
2555 qp->sqp_proxy_rcv[ind].map,
2556 sizeof (struct mlx4_ib_proxy_sqp_hdr),
2557 DMA_FROM_DEVICE);
2558 scat->byte_count =
2559 cpu_to_be32(sizeof (struct mlx4_ib_proxy_sqp_hdr));
2560 /* use dma lkey from upper layer entry */
2561 scat->lkey = cpu_to_be32(wr->sg_list->lkey);
2562 scat->addr = cpu_to_be64(qp->sqp_proxy_rcv[ind].map);
2563 scat++;
2564 max_gs--;
2565 }
2566
2567 for (i = 0; i < wr->num_sge; ++i)
2568 __set_data_seg(scat + i, wr->sg_list + i);
2569
2570 if (i < max_gs) {
2571 scat[i].byte_count = 0;
2572 scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY);
2573 scat[i].addr = 0;
2574 }
2575
2576 qp->rq.wrid[ind] = wr->wr_id;
2577
2578 ind = (ind + 1) & (qp->rq.wqe_cnt - 1);
2579 }
2580
2581 out:
2582 if (likely(nreq)) {
2583 qp->rq.head += nreq;
2584
2585 /*
2586 * Make sure that descriptors are written before
2587 * doorbell record.
2588 */
2589 wmb();
2590
2591 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
2592 }
2593
2594 spin_unlock_irqrestore(&qp->rq.lock, flags);
2595
2596 return err;
2597 }
2598
2599 static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state)
2600 {
2601 switch (mlx4_state) {
2602 case MLX4_QP_STATE_RST: return IB_QPS_RESET;
2603 case MLX4_QP_STATE_INIT: return IB_QPS_INIT;
2604 case MLX4_QP_STATE_RTR: return IB_QPS_RTR;
2605 case MLX4_QP_STATE_RTS: return IB_QPS_RTS;
2606 case MLX4_QP_STATE_SQ_DRAINING:
2607 case MLX4_QP_STATE_SQD: return IB_QPS_SQD;
2608 case MLX4_QP_STATE_SQER: return IB_QPS_SQE;
2609 case MLX4_QP_STATE_ERR: return IB_QPS_ERR;
2610 default: return -1;
2611 }
2612 }
2613
2614 static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state)
2615 {
2616 switch (mlx4_mig_state) {
2617 case MLX4_QP_PM_ARMED: return IB_MIG_ARMED;
2618 case MLX4_QP_PM_REARM: return IB_MIG_REARM;
2619 case MLX4_QP_PM_MIGRATED: return IB_MIG_MIGRATED;
2620 default: return -1;
2621 }
2622 }
2623
2624 static int to_ib_qp_access_flags(int mlx4_flags)
2625 {
2626 int ib_flags = 0;
2627
2628 if (mlx4_flags & MLX4_QP_BIT_RRE)
2629 ib_flags |= IB_ACCESS_REMOTE_READ;
2630 if (mlx4_flags & MLX4_QP_BIT_RWE)
2631 ib_flags |= IB_ACCESS_REMOTE_WRITE;
2632 if (mlx4_flags & MLX4_QP_BIT_RAE)
2633 ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
2634
2635 return ib_flags;
2636 }
2637
2638 static void to_ib_ah_attr(struct mlx4_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr,
2639 struct mlx4_qp_path *path)
2640 {
2641 struct mlx4_dev *dev = ibdev->dev;
2642 int is_eth;
2643
2644 memset(ib_ah_attr, 0, sizeof *ib_ah_attr);
2645 ib_ah_attr->port_num = path->sched_queue & 0x40 ? 2 : 1;
2646
2647 if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports)
2648 return;
2649
2650 is_eth = rdma_port_get_link_layer(&ibdev->ib_dev, ib_ah_attr->port_num) ==
2651 IB_LINK_LAYER_ETHERNET;
2652 if (is_eth)
2653 ib_ah_attr->sl = ((path->sched_queue >> 3) & 0x7) |
2654 ((path->sched_queue & 4) << 1);
2655 else
2656 ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf;
2657
2658 ib_ah_attr->dlid = be16_to_cpu(path->rlid);
2659 ib_ah_attr->src_path_bits = path->grh_mylmc & 0x7f;
2660 ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0;
2661 ib_ah_attr->ah_flags = (path->grh_mylmc & (1 << 7)) ? IB_AH_GRH : 0;
2662 if (ib_ah_attr->ah_flags) {
2663 ib_ah_attr->grh.sgid_index = path->mgid_index;
2664 ib_ah_attr->grh.hop_limit = path->hop_limit;
2665 ib_ah_attr->grh.traffic_class =
2666 (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff;
2667 ib_ah_attr->grh.flow_label =
2668 be32_to_cpu(path->tclass_flowlabel) & 0xfffff;
2669 memcpy(ib_ah_attr->grh.dgid.raw,
2670 path->rgid, sizeof ib_ah_attr->grh.dgid.raw);
2671 }
2672 }
2673
2674 int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
2675 struct ib_qp_init_attr *qp_init_attr)
2676 {
2677 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
2678 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2679 struct mlx4_qp_context context;
2680 int mlx4_state;
2681 int err = 0;
2682
2683 mutex_lock(&qp->mutex);
2684
2685 if (qp->state == IB_QPS_RESET) {
2686 qp_attr->qp_state = IB_QPS_RESET;
2687 goto done;
2688 }
2689
2690 err = mlx4_qp_query(dev->dev, &qp->mqp, &context);
2691 if (err) {
2692 err = -EINVAL;
2693 goto out;
2694 }
2695
2696 mlx4_state = be32_to_cpu(context.flags) >> 28;
2697
2698 qp->state = to_ib_qp_state(mlx4_state);
2699 qp_attr->qp_state = qp->state;
2700 qp_attr->path_mtu = context.mtu_msgmax >> 5;
2701 qp_attr->path_mig_state =
2702 to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3);
2703 qp_attr->qkey = be32_to_cpu(context.qkey);
2704 qp_attr->rq_psn = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff;
2705 qp_attr->sq_psn = be32_to_cpu(context.next_send_psn) & 0xffffff;
2706 qp_attr->dest_qp_num = be32_to_cpu(context.remote_qpn) & 0xffffff;
2707 qp_attr->qp_access_flags =
2708 to_ib_qp_access_flags(be32_to_cpu(context.params2));
2709
2710 if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) {
2711 to_ib_ah_attr(dev, &qp_attr->ah_attr, &context.pri_path);
2712 to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context.alt_path);
2713 qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f;
2714 qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num;
2715 }
2716
2717 qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f;
2718 if (qp_attr->qp_state == IB_QPS_INIT)
2719 qp_attr->port_num = qp->port;
2720 else
2721 qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1;
2722
2723 /* qp_attr->en_sqd_async_notify is only applicable in modify qp */
2724 qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING;
2725
2726 qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7);
2727
2728 qp_attr->max_dest_rd_atomic =
2729 1 << ((be32_to_cpu(context.params2) >> 21) & 0x7);
2730 qp_attr->min_rnr_timer =
2731 (be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f;
2732 qp_attr->timeout = context.pri_path.ackto >> 3;
2733 qp_attr->retry_cnt = (be32_to_cpu(context.params1) >> 16) & 0x7;
2734 qp_attr->rnr_retry = (be32_to_cpu(context.params1) >> 13) & 0x7;
2735 qp_attr->alt_timeout = context.alt_path.ackto >> 3;
2736
2737 done:
2738 qp_attr->cur_qp_state = qp_attr->qp_state;
2739 qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt;
2740 qp_attr->cap.max_recv_sge = qp->rq.max_gs;
2741
2742 if (!ibqp->uobject) {
2743 qp_attr->cap.max_send_wr = qp->sq.wqe_cnt;
2744 qp_attr->cap.max_send_sge = qp->sq.max_gs;
2745 } else {
2746 qp_attr->cap.max_send_wr = 0;
2747 qp_attr->cap.max_send_sge = 0;
2748 }
2749
2750 /*
2751 * We don't support inline sends for kernel QPs (yet), and we
2752 * don't know what userspace's value should be.
2753 */
2754 qp_attr->cap.max_inline_data = 0;
2755
2756 qp_init_attr->cap = qp_attr->cap;
2757
2758 qp_init_attr->create_flags = 0;
2759 if (qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK)
2760 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
2761
2762 if (qp->flags & MLX4_IB_QP_LSO)
2763 qp_init_attr->create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
2764
2765 qp_init_attr->sq_sig_type =
2766 qp->sq_signal_bits == cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) ?
2767 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
2768
2769 out:
2770 mutex_unlock(&qp->mutex);
2771 return err;
2772 }
2773
CRIS linux kernel tree