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IB/mlx4: Support memory window binding
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / infiniband / hw / mlx4 / qp.c
1 /*
2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34 #include <linux/log2.h>
35 #include <linux/slab.h>
36 #include <linux/netdevice.h>
37
38 #include <rdma/ib_cache.h>
39 #include <rdma/ib_pack.h>
40 #include <rdma/ib_addr.h>
41 #include <rdma/ib_mad.h>
42
43 #include <linux/mlx4/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 }
1296
1297 if (qp->ibqp.uobject)
1298 context->usr_page = cpu_to_be32(to_mucontext(ibqp->uobject->context)->uar.index);
1299 else
1300 context->usr_page = cpu_to_be32(dev->priv_uar.index);
1301
1302 if (attr_mask & IB_QP_DEST_QPN)
1303 context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
1304
1305 if (attr_mask & IB_QP_PORT) {
1306 if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD &&
1307 !(attr_mask & IB_QP_AV)) {
1308 mlx4_set_sched(&context->pri_path, attr->port_num);
1309 optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE;
1310 }
1311 }
1312
1313 if (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) {
1314 if (dev->counters[qp->port - 1] != -1) {
1315 context->pri_path.counter_index =
1316 dev->counters[qp->port - 1];
1317 optpar |= MLX4_QP_OPTPAR_COUNTER_INDEX;
1318 } else
1319 context->pri_path.counter_index = 0xff;
1320 }
1321
1322 if (attr_mask & IB_QP_PKEY_INDEX) {
1323 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1324 context->pri_path.disable_pkey_check = 0x40;
1325 context->pri_path.pkey_index = attr->pkey_index;
1326 optpar |= MLX4_QP_OPTPAR_PKEY_INDEX;
1327 }
1328
1329 if (attr_mask & IB_QP_AV) {
1330 if (mlx4_set_path(dev, &attr->ah_attr, &context->pri_path,
1331 attr_mask & IB_QP_PORT ?
1332 attr->port_num : qp->port))
1333 goto out;
1334
1335 optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH |
1336 MLX4_QP_OPTPAR_SCHED_QUEUE);
1337 }
1338
1339 if (attr_mask & IB_QP_TIMEOUT) {
1340 context->pri_path.ackto |= attr->timeout << 3;
1341 optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT;
1342 }
1343
1344 if (attr_mask & IB_QP_ALT_PATH) {
1345 if (attr->alt_port_num == 0 ||
1346 attr->alt_port_num > dev->dev->caps.num_ports)
1347 goto out;
1348
1349 if (attr->alt_pkey_index >=
1350 dev->dev->caps.pkey_table_len[attr->alt_port_num])
1351 goto out;
1352
1353 if (mlx4_set_path(dev, &attr->alt_ah_attr, &context->alt_path,
1354 attr->alt_port_num))
1355 goto out;
1356
1357 context->alt_path.pkey_index = attr->alt_pkey_index;
1358 context->alt_path.ackto = attr->alt_timeout << 3;
1359 optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH;
1360 }
1361
1362 pd = get_pd(qp);
1363 get_cqs(qp, &send_cq, &recv_cq);
1364 context->pd = cpu_to_be32(pd->pdn);
1365 context->cqn_send = cpu_to_be32(send_cq->mcq.cqn);
1366 context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn);
1367 context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28);
1368
1369 /* Set "fast registration enabled" for all kernel QPs */
1370 if (!qp->ibqp.uobject)
1371 context->params1 |= cpu_to_be32(1 << 11);
1372
1373 if (attr_mask & IB_QP_RNR_RETRY) {
1374 context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
1375 optpar |= MLX4_QP_OPTPAR_RNR_RETRY;
1376 }
1377
1378 if (attr_mask & IB_QP_RETRY_CNT) {
1379 context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
1380 optpar |= MLX4_QP_OPTPAR_RETRY_COUNT;
1381 }
1382
1383 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1384 if (attr->max_rd_atomic)
1385 context->params1 |=
1386 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
1387 optpar |= MLX4_QP_OPTPAR_SRA_MAX;
1388 }
1389
1390 if (attr_mask & IB_QP_SQ_PSN)
1391 context->next_send_psn = cpu_to_be32(attr->sq_psn);
1392
1393 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1394 if (attr->max_dest_rd_atomic)
1395 context->params2 |=
1396 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
1397 optpar |= MLX4_QP_OPTPAR_RRA_MAX;
1398 }
1399
1400 if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) {
1401 context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask);
1402 optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE;
1403 }
1404
1405 if (ibqp->srq)
1406 context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC);
1407
1408 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
1409 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
1410 optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT;
1411 }
1412 if (attr_mask & IB_QP_RQ_PSN)
1413 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
1414
1415 /* proxy and tunnel qp qkeys will be changed in modify-qp wrappers */
1416 if (attr_mask & IB_QP_QKEY) {
1417 if (qp->mlx4_ib_qp_type &
1418 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))
1419 context->qkey = cpu_to_be32(IB_QP_SET_QKEY);
1420 else {
1421 if (mlx4_is_mfunc(dev->dev) &&
1422 !(qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) &&
1423 (attr->qkey & MLX4_RESERVED_QKEY_MASK) ==
1424 MLX4_RESERVED_QKEY_BASE) {
1425 pr_err("Cannot use reserved QKEY"
1426 " 0x%x (range 0xffff0000..0xffffffff"
1427 " is reserved)\n", attr->qkey);
1428 err = -EINVAL;
1429 goto out;
1430 }
1431 context->qkey = cpu_to_be32(attr->qkey);
1432 }
1433 optpar |= MLX4_QP_OPTPAR_Q_KEY;
1434 }
1435
1436 if (ibqp->srq)
1437 context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn);
1438
1439 if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1440 context->db_rec_addr = cpu_to_be64(qp->db.dma);
1441
1442 if (cur_state == IB_QPS_INIT &&
1443 new_state == IB_QPS_RTR &&
1444 (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
1445 ibqp->qp_type == IB_QPT_UD ||
1446 ibqp->qp_type == IB_QPT_RAW_PACKET)) {
1447 context->pri_path.sched_queue = (qp->port - 1) << 6;
1448 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
1449 qp->mlx4_ib_qp_type &
1450 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) {
1451 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE;
1452 if (qp->mlx4_ib_qp_type != MLX4_IB_QPT_SMI)
1453 context->pri_path.fl = 0x80;
1454 } else {
1455 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1456 context->pri_path.fl = 0x80;
1457 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE;
1458 }
1459 }
1460
1461 if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD &&
1462 attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
1463 sqd_event = 1;
1464 else
1465 sqd_event = 0;
1466
1467 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1468 context->rlkey |= (1 << 4);
1469
1470 /*
1471 * Before passing a kernel QP to the HW, make sure that the
1472 * ownership bits of the send queue are set and the SQ
1473 * headroom is stamped so that the hardware doesn't start
1474 * processing stale work requests.
1475 */
1476 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
1477 struct mlx4_wqe_ctrl_seg *ctrl;
1478 int i;
1479
1480 for (i = 0; i < qp->sq.wqe_cnt; ++i) {
1481 ctrl = get_send_wqe(qp, i);
1482 ctrl->owner_opcode = cpu_to_be32(1 << 31);
1483 if (qp->sq_max_wqes_per_wr == 1)
1484 ctrl->fence_size = 1 << (qp->sq.wqe_shift - 4);
1485
1486 stamp_send_wqe(qp, i, 1 << qp->sq.wqe_shift);
1487 }
1488 }
1489
1490 err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state),
1491 to_mlx4_state(new_state), context, optpar,
1492 sqd_event, &qp->mqp);
1493 if (err)
1494 goto out;
1495
1496 qp->state = new_state;
1497
1498 if (attr_mask & IB_QP_ACCESS_FLAGS)
1499 qp->atomic_rd_en = attr->qp_access_flags;
1500 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1501 qp->resp_depth = attr->max_dest_rd_atomic;
1502 if (attr_mask & IB_QP_PORT) {
1503 qp->port = attr->port_num;
1504 update_mcg_macs(dev, qp);
1505 }
1506 if (attr_mask & IB_QP_ALT_PATH)
1507 qp->alt_port = attr->alt_port_num;
1508
1509 if (is_sqp(dev, qp))
1510 store_sqp_attrs(to_msqp(qp), attr, attr_mask);
1511
1512 /*
1513 * If we moved QP0 to RTR, bring the IB link up; if we moved
1514 * QP0 to RESET or ERROR, bring the link back down.
1515 */
1516 if (is_qp0(dev, qp)) {
1517 if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR)
1518 if (mlx4_INIT_PORT(dev->dev, qp->port))
1519 pr_warn("INIT_PORT failed for port %d\n",
1520 qp->port);
1521
1522 if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR &&
1523 (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR))
1524 mlx4_CLOSE_PORT(dev->dev, qp->port);
1525 }
1526
1527 /*
1528 * If we moved a kernel QP to RESET, clean up all old CQ
1529 * entries and reinitialize the QP.
1530 */
1531 if (new_state == IB_QPS_RESET && !ibqp->uobject) {
1532 mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
1533 ibqp->srq ? to_msrq(ibqp->srq): NULL);
1534 if (send_cq != recv_cq)
1535 mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1536
1537 qp->rq.head = 0;
1538 qp->rq.tail = 0;
1539 qp->sq.head = 0;
1540 qp->sq.tail = 0;
1541 qp->sq_next_wqe = 0;
1542 if (qp->rq.wqe_cnt)
1543 *qp->db.db = 0;
1544 }
1545
1546 out:
1547 kfree(context);
1548 return err;
1549 }
1550
1551 int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1552 int attr_mask, struct ib_udata *udata)
1553 {
1554 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
1555 struct mlx4_ib_qp *qp = to_mqp(ibqp);
1556 enum ib_qp_state cur_state, new_state;
1557 int err = -EINVAL;
1558
1559 mutex_lock(&qp->mutex);
1560
1561 cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
1562 new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
1563
1564 if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, attr_mask)) {
1565 pr_debug("qpn 0x%x: invalid attribute mask specified "
1566 "for transition %d to %d. qp_type %d,"
1567 " attr_mask 0x%x\n",
1568 ibqp->qp_num, cur_state, new_state,
1569 ibqp->qp_type, attr_mask);
1570 goto out;
1571 }
1572
1573 if ((attr_mask & IB_QP_PORT) &&
1574 (attr->port_num == 0 || attr->port_num > dev->num_ports)) {
1575 pr_debug("qpn 0x%x: invalid port number (%d) specified "
1576 "for transition %d to %d. qp_type %d\n",
1577 ibqp->qp_num, attr->port_num, cur_state,
1578 new_state, ibqp->qp_type);
1579 goto out;
1580 }
1581
1582 if ((attr_mask & IB_QP_PORT) && (ibqp->qp_type == IB_QPT_RAW_PACKET) &&
1583 (rdma_port_get_link_layer(&dev->ib_dev, attr->port_num) !=
1584 IB_LINK_LAYER_ETHERNET))
1585 goto out;
1586
1587 if (attr_mask & IB_QP_PKEY_INDEX) {
1588 int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1589 if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) {
1590 pr_debug("qpn 0x%x: invalid pkey index (%d) specified "
1591 "for transition %d to %d. qp_type %d\n",
1592 ibqp->qp_num, attr->pkey_index, cur_state,
1593 new_state, ibqp->qp_type);
1594 goto out;
1595 }
1596 }
1597
1598 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
1599 attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) {
1600 pr_debug("qpn 0x%x: max_rd_atomic (%d) too large. "
1601 "Transition %d to %d. qp_type %d\n",
1602 ibqp->qp_num, attr->max_rd_atomic, cur_state,
1603 new_state, ibqp->qp_type);
1604 goto out;
1605 }
1606
1607 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
1608 attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) {
1609 pr_debug("qpn 0x%x: max_dest_rd_atomic (%d) too large. "
1610 "Transition %d to %d. qp_type %d\n",
1611 ibqp->qp_num, attr->max_dest_rd_atomic, cur_state,
1612 new_state, ibqp->qp_type);
1613 goto out;
1614 }
1615
1616 if (cur_state == new_state && cur_state == IB_QPS_RESET) {
1617 err = 0;
1618 goto out;
1619 }
1620
1621 err = __mlx4_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state);
1622
1623 out:
1624 mutex_unlock(&qp->mutex);
1625 return err;
1626 }
1627
1628 static int build_sriov_qp0_header(struct mlx4_ib_sqp *sqp,
1629 struct ib_send_wr *wr,
1630 void *wqe, unsigned *mlx_seg_len)
1631 {
1632 struct mlx4_ib_dev *mdev = to_mdev(sqp->qp.ibqp.device);
1633 struct ib_device *ib_dev = &mdev->ib_dev;
1634 struct mlx4_wqe_mlx_seg *mlx = wqe;
1635 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
1636 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
1637 u16 pkey;
1638 u32 qkey;
1639 int send_size;
1640 int header_size;
1641 int spc;
1642 int i;
1643
1644 if (wr->opcode != IB_WR_SEND)
1645 return -EINVAL;
1646
1647 send_size = 0;
1648
1649 for (i = 0; i < wr->num_sge; ++i)
1650 send_size += wr->sg_list[i].length;
1651
1652 /* for proxy-qp0 sends, need to add in size of tunnel header */
1653 /* for tunnel-qp0 sends, tunnel header is already in s/g list */
1654 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER)
1655 send_size += sizeof (struct mlx4_ib_tunnel_header);
1656
1657 ib_ud_header_init(send_size, 1, 0, 0, 0, 0, &sqp->ud_header);
1658
1659 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) {
1660 sqp->ud_header.lrh.service_level =
1661 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
1662 sqp->ud_header.lrh.destination_lid =
1663 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
1664 sqp->ud_header.lrh.source_lid =
1665 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
1666 }
1667
1668 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
1669
1670 /* force loopback */
1671 mlx->flags |= cpu_to_be32(MLX4_WQE_MLX_VL15 | 0x1 | MLX4_WQE_MLX_SLR);
1672 mlx->rlid = sqp->ud_header.lrh.destination_lid;
1673
1674 sqp->ud_header.lrh.virtual_lane = 0;
1675 sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
1676 ib_get_cached_pkey(ib_dev, sqp->qp.port, 0, &pkey);
1677 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
1678 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_TUN_SMI_OWNER)
1679 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
1680 else
1681 sqp->ud_header.bth.destination_qpn =
1682 cpu_to_be32(mdev->dev->caps.qp0_tunnel[sqp->qp.port - 1]);
1683
1684 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
1685 if (mlx4_get_parav_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
1686 return -EINVAL;
1687 sqp->ud_header.deth.qkey = cpu_to_be32(qkey);
1688 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.mqp.qpn);
1689
1690 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
1691 sqp->ud_header.immediate_present = 0;
1692
1693 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
1694
1695 /*
1696 * Inline data segments may not cross a 64 byte boundary. If
1697 * our UD header is bigger than the space available up to the
1698 * next 64 byte boundary in the WQE, use two inline data
1699 * segments to hold the UD header.
1700 */
1701 spc = MLX4_INLINE_ALIGN -
1702 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
1703 if (header_size <= spc) {
1704 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
1705 memcpy(inl + 1, sqp->header_buf, header_size);
1706 i = 1;
1707 } else {
1708 inl->byte_count = cpu_to_be32(1 << 31 | spc);
1709 memcpy(inl + 1, sqp->header_buf, spc);
1710
1711 inl = (void *) (inl + 1) + spc;
1712 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
1713 /*
1714 * Need a barrier here to make sure all the data is
1715 * visible before the byte_count field is set.
1716 * Otherwise the HCA prefetcher could grab the 64-byte
1717 * chunk with this inline segment and get a valid (!=
1718 * 0xffffffff) byte count but stale data, and end up
1719 * generating a packet with bad headers.
1720 *
1721 * The first inline segment's byte_count field doesn't
1722 * need a barrier, because it comes after a
1723 * control/MLX segment and therefore is at an offset
1724 * of 16 mod 64.
1725 */
1726 wmb();
1727 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
1728 i = 2;
1729 }
1730
1731 *mlx_seg_len =
1732 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
1733 return 0;
1734 }
1735
1736 static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
1737 void *wqe, unsigned *mlx_seg_len)
1738 {
1739 struct ib_device *ib_dev = sqp->qp.ibqp.device;
1740 struct mlx4_wqe_mlx_seg *mlx = wqe;
1741 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
1742 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
1743 struct net_device *ndev;
1744 union ib_gid sgid;
1745 u16 pkey;
1746 int send_size;
1747 int header_size;
1748 int spc;
1749 int i;
1750 int err = 0;
1751 u16 vlan = 0xffff;
1752 bool is_eth;
1753 bool is_vlan = false;
1754 bool is_grh;
1755
1756 send_size = 0;
1757 for (i = 0; i < wr->num_sge; ++i)
1758 send_size += wr->sg_list[i].length;
1759
1760 is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET;
1761 is_grh = mlx4_ib_ah_grh_present(ah);
1762 if (is_eth) {
1763 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
1764 /* When multi-function is enabled, the ib_core gid
1765 * indexes don't necessarily match the hw ones, so
1766 * we must use our own cache */
1767 sgid.global.subnet_prefix =
1768 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
1769 subnet_prefix;
1770 sgid.global.interface_id =
1771 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
1772 guid_cache[ah->av.ib.gid_index];
1773 } else {
1774 err = ib_get_cached_gid(ib_dev,
1775 be32_to_cpu(ah->av.ib.port_pd) >> 24,
1776 ah->av.ib.gid_index, &sgid);
1777 if (err)
1778 return err;
1779 }
1780
1781 vlan = rdma_get_vlan_id(&sgid);
1782 is_vlan = vlan < 0x1000;
1783 }
1784 ib_ud_header_init(send_size, !is_eth, is_eth, is_vlan, is_grh, 0, &sqp->ud_header);
1785
1786 if (!is_eth) {
1787 sqp->ud_header.lrh.service_level =
1788 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
1789 sqp->ud_header.lrh.destination_lid = ah->av.ib.dlid;
1790 sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f);
1791 }
1792
1793 if (is_grh) {
1794 sqp->ud_header.grh.traffic_class =
1795 (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff;
1796 sqp->ud_header.grh.flow_label =
1797 ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
1798 sqp->ud_header.grh.hop_limit = ah->av.ib.hop_limit;
1799 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
1800 /* When multi-function is enabled, the ib_core gid
1801 * indexes don't necessarily match the hw ones, so
1802 * we must use our own cache */
1803 sqp->ud_header.grh.source_gid.global.subnet_prefix =
1804 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
1805 subnet_prefix;
1806 sqp->ud_header.grh.source_gid.global.interface_id =
1807 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
1808 guid_cache[ah->av.ib.gid_index];
1809 } else
1810 ib_get_cached_gid(ib_dev,
1811 be32_to_cpu(ah->av.ib.port_pd) >> 24,
1812 ah->av.ib.gid_index,
1813 &sqp->ud_header.grh.source_gid);
1814 memcpy(sqp->ud_header.grh.destination_gid.raw,
1815 ah->av.ib.dgid, 16);
1816 }
1817
1818 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
1819
1820 if (!is_eth) {
1821 mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) |
1822 (sqp->ud_header.lrh.destination_lid ==
1823 IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) |
1824 (sqp->ud_header.lrh.service_level << 8));
1825 if (ah->av.ib.port_pd & cpu_to_be32(0x80000000))
1826 mlx->flags |= cpu_to_be32(0x1); /* force loopback */
1827 mlx->rlid = sqp->ud_header.lrh.destination_lid;
1828 }
1829
1830 switch (wr->opcode) {
1831 case IB_WR_SEND:
1832 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
1833 sqp->ud_header.immediate_present = 0;
1834 break;
1835 case IB_WR_SEND_WITH_IMM:
1836 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
1837 sqp->ud_header.immediate_present = 1;
1838 sqp->ud_header.immediate_data = wr->ex.imm_data;
1839 break;
1840 default:
1841 return -EINVAL;
1842 }
1843
1844 if (is_eth) {
1845 u8 *smac;
1846 u16 pcp = (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 29) << 13;
1847
1848 mlx->sched_prio = cpu_to_be16(pcp);
1849
1850 memcpy(sqp->ud_header.eth.dmac_h, ah->av.eth.mac, 6);
1851 /* FIXME: cache smac value? */
1852 ndev = to_mdev(sqp->qp.ibqp.device)->iboe.netdevs[sqp->qp.port - 1];
1853 if (!ndev)
1854 return -ENODEV;
1855 smac = ndev->dev_addr;
1856 memcpy(sqp->ud_header.eth.smac_h, smac, 6);
1857 if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6))
1858 mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
1859 if (!is_vlan) {
1860 sqp->ud_header.eth.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
1861 } else {
1862 sqp->ud_header.vlan.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
1863 sqp->ud_header.vlan.tag = cpu_to_be16(vlan | pcp);
1864 }
1865 } else {
1866 sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0;
1867 if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
1868 sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
1869 }
1870 sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
1871 if (!sqp->qp.ibqp.qp_num)
1872 ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey);
1873 else
1874 ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey);
1875 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
1876 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
1877 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
1878 sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
1879 sqp->qkey : wr->wr.ud.remote_qkey);
1880 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
1881
1882 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
1883
1884 if (0) {
1885 pr_err("built UD header of size %d:\n", header_size);
1886 for (i = 0; i < header_size / 4; ++i) {
1887 if (i % 8 == 0)
1888 pr_err(" [%02x] ", i * 4);
1889 pr_cont(" %08x",
1890 be32_to_cpu(((__be32 *) sqp->header_buf)[i]));
1891 if ((i + 1) % 8 == 0)
1892 pr_cont("\n");
1893 }
1894 pr_err("\n");
1895 }
1896
1897 /*
1898 * Inline data segments may not cross a 64 byte boundary. If
1899 * our UD header is bigger than the space available up to the
1900 * next 64 byte boundary in the WQE, use two inline data
1901 * segments to hold the UD header.
1902 */
1903 spc = MLX4_INLINE_ALIGN -
1904 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
1905 if (header_size <= spc) {
1906 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
1907 memcpy(inl + 1, sqp->header_buf, header_size);
1908 i = 1;
1909 } else {
1910 inl->byte_count = cpu_to_be32(1 << 31 | spc);
1911 memcpy(inl + 1, sqp->header_buf, spc);
1912
1913 inl = (void *) (inl + 1) + spc;
1914 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
1915 /*
1916 * Need a barrier here to make sure all the data is
1917 * visible before the byte_count field is set.
1918 * Otherwise the HCA prefetcher could grab the 64-byte
1919 * chunk with this inline segment and get a valid (!=
1920 * 0xffffffff) byte count but stale data, and end up
1921 * generating a packet with bad headers.
1922 *
1923 * The first inline segment's byte_count field doesn't
1924 * need a barrier, because it comes after a
1925 * control/MLX segment and therefore is at an offset
1926 * of 16 mod 64.
1927 */
1928 wmb();
1929 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
1930 i = 2;
1931 }
1932
1933 *mlx_seg_len =
1934 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
1935 return 0;
1936 }
1937
1938 static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
1939 {
1940 unsigned cur;
1941 struct mlx4_ib_cq *cq;
1942
1943 cur = wq->head - wq->tail;
1944 if (likely(cur + nreq < wq->max_post))
1945 return 0;
1946
1947 cq = to_mcq(ib_cq);
1948 spin_lock(&cq->lock);
1949 cur = wq->head - wq->tail;
1950 spin_unlock(&cq->lock);
1951
1952 return cur + nreq >= wq->max_post;
1953 }
1954
1955 static __be32 convert_access(int acc)
1956 {
1957 return (acc & IB_ACCESS_REMOTE_ATOMIC ?
1958 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC) : 0) |
1959 (acc & IB_ACCESS_REMOTE_WRITE ?
1960 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE) : 0) |
1961 (acc & IB_ACCESS_REMOTE_READ ?
1962 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ) : 0) |
1963 (acc & IB_ACCESS_LOCAL_WRITE ? cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_WRITE) : 0) |
1964 cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_READ);
1965 }
1966
1967 static void set_fmr_seg(struct mlx4_wqe_fmr_seg *fseg, struct ib_send_wr *wr)
1968 {
1969 struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(wr->wr.fast_reg.page_list);
1970 int i;
1971
1972 for (i = 0; i < wr->wr.fast_reg.page_list_len; ++i)
1973 mfrpl->mapped_page_list[i] =
1974 cpu_to_be64(wr->wr.fast_reg.page_list->page_list[i] |
1975 MLX4_MTT_FLAG_PRESENT);
1976
1977 fseg->flags = convert_access(wr->wr.fast_reg.access_flags);
1978 fseg->mem_key = cpu_to_be32(wr->wr.fast_reg.rkey);
1979 fseg->buf_list = cpu_to_be64(mfrpl->map);
1980 fseg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start);
1981 fseg->reg_len = cpu_to_be64(wr->wr.fast_reg.length);
1982 fseg->offset = 0; /* XXX -- is this just for ZBVA? */
1983 fseg->page_size = cpu_to_be32(wr->wr.fast_reg.page_shift);
1984 fseg->reserved[0] = 0;
1985 fseg->reserved[1] = 0;
1986 }
1987
1988 static void set_bind_seg(struct mlx4_wqe_bind_seg *bseg, struct ib_send_wr *wr)
1989 {
1990 bseg->flags1 =
1991 convert_access(wr->wr.bind_mw.bind_info.mw_access_flags) &
1992 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ |
1993 MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE |
1994 MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC);
1995 bseg->flags2 = 0;
1996 if (wr->wr.bind_mw.mw->type == IB_MW_TYPE_2)
1997 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_TYPE_2);
1998 if (wr->wr.bind_mw.bind_info.mw_access_flags & IB_ZERO_BASED)
1999 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_ZERO_BASED);
2000 bseg->new_rkey = cpu_to_be32(wr->wr.bind_mw.rkey);
2001 bseg->lkey = cpu_to_be32(wr->wr.bind_mw.bind_info.mr->lkey);
2002 bseg->addr = cpu_to_be64(wr->wr.bind_mw.bind_info.addr);
2003 bseg->length = cpu_to_be64(wr->wr.bind_mw.bind_info.length);
2004 }
2005
2006 static void set_local_inv_seg(struct mlx4_wqe_local_inval_seg *iseg, u32 rkey)
2007 {
2008 memset(iseg, 0, sizeof(*iseg));
2009 iseg->mem_key = cpu_to_be32(rkey);
2010 }
2011
2012 static __always_inline void set_raddr_seg(struct mlx4_wqe_raddr_seg *rseg,
2013 u64 remote_addr, u32 rkey)
2014 {
2015 rseg->raddr = cpu_to_be64(remote_addr);
2016 rseg->rkey = cpu_to_be32(rkey);
2017 rseg->reserved = 0;
2018 }
2019
2020 static void set_atomic_seg(struct mlx4_wqe_atomic_seg *aseg, struct ib_send_wr *wr)
2021 {
2022 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
2023 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
2024 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
2025 } else if (wr->opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) {
2026 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2027 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2028 } else {
2029 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2030 aseg->compare = 0;
2031 }
2032
2033 }
2034
2035 static void set_masked_atomic_seg(struct mlx4_wqe_masked_atomic_seg *aseg,
2036 struct ib_send_wr *wr)
2037 {
2038 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
2039 aseg->swap_add_mask = cpu_to_be64(wr->wr.atomic.swap_mask);
2040 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
2041 aseg->compare_mask = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2042 }
2043
2044 static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg,
2045 struct ib_send_wr *wr)
2046 {
2047 memcpy(dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av));
2048 dseg->dqpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2049 dseg->qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2050 dseg->vlan = to_mah(wr->wr.ud.ah)->av.eth.vlan;
2051 memcpy(dseg->mac, to_mah(wr->wr.ud.ah)->av.eth.mac, 6);
2052 }
2053
2054 static void set_tunnel_datagram_seg(struct mlx4_ib_dev *dev,
2055 struct mlx4_wqe_datagram_seg *dseg,
2056 struct ib_send_wr *wr, enum ib_qp_type qpt)
2057 {
2058 union mlx4_ext_av *av = &to_mah(wr->wr.ud.ah)->av;
2059 struct mlx4_av sqp_av = {0};
2060 int port = *((u8 *) &av->ib.port_pd) & 0x3;
2061
2062 /* force loopback */
2063 sqp_av.port_pd = av->ib.port_pd | cpu_to_be32(0x80000000);
2064 sqp_av.g_slid = av->ib.g_slid & 0x7f; /* no GRH */
2065 sqp_av.sl_tclass_flowlabel = av->ib.sl_tclass_flowlabel &
2066 cpu_to_be32(0xf0000000);
2067
2068 memcpy(dseg->av, &sqp_av, sizeof (struct mlx4_av));
2069 /* This function used only for sending on QP1 proxies */
2070 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp1_tunnel[port - 1]);
2071 /* Use QKEY from the QP context, which is set by master */
2072 dseg->qkey = cpu_to_be32(IB_QP_SET_QKEY);
2073 }
2074
2075 static void build_tunnel_header(struct ib_send_wr *wr, void *wqe, unsigned *mlx_seg_len)
2076 {
2077 struct mlx4_wqe_inline_seg *inl = wqe;
2078 struct mlx4_ib_tunnel_header hdr;
2079 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2080 int spc;
2081 int i;
2082
2083 memcpy(&hdr.av, &ah->av, sizeof hdr.av);
2084 hdr.remote_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2085 hdr.pkey_index = cpu_to_be16(wr->wr.ud.pkey_index);
2086 hdr.qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2087
2088 spc = MLX4_INLINE_ALIGN -
2089 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2090 if (sizeof (hdr) <= spc) {
2091 memcpy(inl + 1, &hdr, sizeof (hdr));
2092 wmb();
2093 inl->byte_count = cpu_to_be32(1 << 31 | sizeof (hdr));
2094 i = 1;
2095 } else {
2096 memcpy(inl + 1, &hdr, spc);
2097 wmb();
2098 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2099
2100 inl = (void *) (inl + 1) + spc;
2101 memcpy(inl + 1, (void *) &hdr + spc, sizeof (hdr) - spc);
2102 wmb();
2103 inl->byte_count = cpu_to_be32(1 << 31 | (sizeof (hdr) - spc));
2104 i = 2;
2105 }
2106
2107 *mlx_seg_len =
2108 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + sizeof (hdr), 16);
2109 }
2110
2111 static void set_mlx_icrc_seg(void *dseg)
2112 {
2113 u32 *t = dseg;
2114 struct mlx4_wqe_inline_seg *iseg = dseg;
2115
2116 t[1] = 0;
2117
2118 /*
2119 * Need a barrier here before writing the byte_count field to
2120 * make sure that all the data is visible before the
2121 * byte_count field is set. Otherwise, if the segment begins
2122 * a new cacheline, the HCA prefetcher could grab the 64-byte
2123 * chunk and get a valid (!= * 0xffffffff) byte count but
2124 * stale data, and end up sending the wrong data.
2125 */
2126 wmb();
2127
2128 iseg->byte_count = cpu_to_be32((1 << 31) | 4);
2129 }
2130
2131 static void set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2132 {
2133 dseg->lkey = cpu_to_be32(sg->lkey);
2134 dseg->addr = cpu_to_be64(sg->addr);
2135
2136 /*
2137 * Need a barrier here before writing the byte_count field to
2138 * make sure that all the data is visible before the
2139 * byte_count field is set. Otherwise, if the segment begins
2140 * a new cacheline, the HCA prefetcher could grab the 64-byte
2141 * chunk and get a valid (!= * 0xffffffff) byte count but
2142 * stale data, and end up sending the wrong data.
2143 */
2144 wmb();
2145
2146 dseg->byte_count = cpu_to_be32(sg->length);
2147 }
2148
2149 static void __set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2150 {
2151 dseg->byte_count = cpu_to_be32(sg->length);
2152 dseg->lkey = cpu_to_be32(sg->lkey);
2153 dseg->addr = cpu_to_be64(sg->addr);
2154 }
2155
2156 static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe, struct ib_send_wr *wr,
2157 struct mlx4_ib_qp *qp, unsigned *lso_seg_len,
2158 __be32 *lso_hdr_sz, __be32 *blh)
2159 {
2160 unsigned halign = ALIGN(sizeof *wqe + wr->wr.ud.hlen, 16);
2161
2162 if (unlikely(halign > MLX4_IB_CACHE_LINE_SIZE))
2163 *blh = cpu_to_be32(1 << 6);
2164
2165 if (unlikely(!(qp->flags & MLX4_IB_QP_LSO) &&
2166 wr->num_sge > qp->sq.max_gs - (halign >> 4)))
2167 return -EINVAL;
2168
2169 memcpy(wqe->header, wr->wr.ud.header, wr->wr.ud.hlen);
2170
2171 *lso_hdr_sz = cpu_to_be32((wr->wr.ud.mss - wr->wr.ud.hlen) << 16 |
2172 wr->wr.ud.hlen);
2173 *lso_seg_len = halign;
2174 return 0;
2175 }
2176
2177 static __be32 send_ieth(struct ib_send_wr *wr)
2178 {
2179 switch (wr->opcode) {
2180 case IB_WR_SEND_WITH_IMM:
2181 case IB_WR_RDMA_WRITE_WITH_IMM:
2182 return wr->ex.imm_data;
2183
2184 case IB_WR_SEND_WITH_INV:
2185 return cpu_to_be32(wr->ex.invalidate_rkey);
2186
2187 default:
2188 return 0;
2189 }
2190 }
2191
2192 static void add_zero_len_inline(void *wqe)
2193 {
2194 struct mlx4_wqe_inline_seg *inl = wqe;
2195 memset(wqe, 0, 16);
2196 inl->byte_count = cpu_to_be32(1 << 31);
2197 }
2198
2199 int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
2200 struct ib_send_wr **bad_wr)
2201 {
2202 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2203 void *wqe;
2204 struct mlx4_wqe_ctrl_seg *ctrl;
2205 struct mlx4_wqe_data_seg *dseg;
2206 unsigned long flags;
2207 int nreq;
2208 int err = 0;
2209 unsigned ind;
2210 int uninitialized_var(stamp);
2211 int uninitialized_var(size);
2212 unsigned uninitialized_var(seglen);
2213 __be32 dummy;
2214 __be32 *lso_wqe;
2215 __be32 uninitialized_var(lso_hdr_sz);
2216 __be32 blh;
2217 int i;
2218
2219 spin_lock_irqsave(&qp->sq.lock, flags);
2220
2221 ind = qp->sq_next_wqe;
2222
2223 for (nreq = 0; wr; ++nreq, wr = wr->next) {
2224 lso_wqe = &dummy;
2225 blh = 0;
2226
2227 if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
2228 err = -ENOMEM;
2229 *bad_wr = wr;
2230 goto out;
2231 }
2232
2233 if (unlikely(wr->num_sge > qp->sq.max_gs)) {
2234 err = -EINVAL;
2235 *bad_wr = wr;
2236 goto out;
2237 }
2238
2239 ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
2240 qp->sq.wrid[(qp->sq.head + nreq) & (qp->sq.wqe_cnt - 1)] = wr->wr_id;
2241
2242 ctrl->srcrb_flags =
2243 (wr->send_flags & IB_SEND_SIGNALED ?
2244 cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) |
2245 (wr->send_flags & IB_SEND_SOLICITED ?
2246 cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) |
2247 ((wr->send_flags & IB_SEND_IP_CSUM) ?
2248 cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
2249 MLX4_WQE_CTRL_TCP_UDP_CSUM) : 0) |
2250 qp->sq_signal_bits;
2251
2252 ctrl->imm = send_ieth(wr);
2253
2254 wqe += sizeof *ctrl;
2255 size = sizeof *ctrl / 16;
2256
2257 switch (qp->mlx4_ib_qp_type) {
2258 case MLX4_IB_QPT_RC:
2259 case MLX4_IB_QPT_UC:
2260 switch (wr->opcode) {
2261 case IB_WR_ATOMIC_CMP_AND_SWP:
2262 case IB_WR_ATOMIC_FETCH_AND_ADD:
2263 case IB_WR_MASKED_ATOMIC_FETCH_AND_ADD:
2264 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2265 wr->wr.atomic.rkey);
2266 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2267
2268 set_atomic_seg(wqe, wr);
2269 wqe += sizeof (struct mlx4_wqe_atomic_seg);
2270
2271 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2272 sizeof (struct mlx4_wqe_atomic_seg)) / 16;
2273
2274 break;
2275
2276 case IB_WR_MASKED_ATOMIC_CMP_AND_SWP:
2277 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2278 wr->wr.atomic.rkey);
2279 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2280
2281 set_masked_atomic_seg(wqe, wr);
2282 wqe += sizeof (struct mlx4_wqe_masked_atomic_seg);
2283
2284 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2285 sizeof (struct mlx4_wqe_masked_atomic_seg)) / 16;
2286
2287 break;
2288
2289 case IB_WR_RDMA_READ:
2290 case IB_WR_RDMA_WRITE:
2291 case IB_WR_RDMA_WRITE_WITH_IMM:
2292 set_raddr_seg(wqe, wr->wr.rdma.remote_addr,
2293 wr->wr.rdma.rkey);
2294 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2295 size += sizeof (struct mlx4_wqe_raddr_seg) / 16;
2296 break;
2297
2298 case IB_WR_LOCAL_INV:
2299 ctrl->srcrb_flags |=
2300 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2301 set_local_inv_seg(wqe, wr->ex.invalidate_rkey);
2302 wqe += sizeof (struct mlx4_wqe_local_inval_seg);
2303 size += sizeof (struct mlx4_wqe_local_inval_seg) / 16;
2304 break;
2305
2306 case IB_WR_FAST_REG_MR:
2307 ctrl->srcrb_flags |=
2308 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2309 set_fmr_seg(wqe, wr);
2310 wqe += sizeof (struct mlx4_wqe_fmr_seg);
2311 size += sizeof (struct mlx4_wqe_fmr_seg) / 16;
2312 break;
2313
2314 case IB_WR_BIND_MW:
2315 ctrl->srcrb_flags |=
2316 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2317 set_bind_seg(wqe, wr);
2318 wqe += sizeof(struct mlx4_wqe_bind_seg);
2319 size += sizeof(struct mlx4_wqe_bind_seg) / 16;
2320 break;
2321 default:
2322 /* No extra segments required for sends */
2323 break;
2324 }
2325 break;
2326
2327 case MLX4_IB_QPT_TUN_SMI_OWNER:
2328 err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2329 if (unlikely(err)) {
2330 *bad_wr = wr;
2331 goto out;
2332 }
2333 wqe += seglen;
2334 size += seglen / 16;
2335 break;
2336 case MLX4_IB_QPT_TUN_SMI:
2337 case MLX4_IB_QPT_TUN_GSI:
2338 /* this is a UD qp used in MAD responses to slaves. */
2339 set_datagram_seg(wqe, wr);
2340 /* set the forced-loopback bit in the data seg av */
2341 *(__be32 *) wqe |= cpu_to_be32(0x80000000);
2342 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2343 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2344 break;
2345 case MLX4_IB_QPT_UD:
2346 set_datagram_seg(wqe, wr);
2347 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2348 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2349
2350 if (wr->opcode == IB_WR_LSO) {
2351 err = build_lso_seg(wqe, wr, qp, &seglen, &lso_hdr_sz, &blh);
2352 if (unlikely(err)) {
2353 *bad_wr = wr;
2354 goto out;
2355 }
2356 lso_wqe = (__be32 *) wqe;
2357 wqe += seglen;
2358 size += seglen / 16;
2359 }
2360 break;
2361
2362 case MLX4_IB_QPT_PROXY_SMI_OWNER:
2363 if (unlikely(!mlx4_is_master(to_mdev(ibqp->device)->dev))) {
2364 err = -ENOSYS;
2365 *bad_wr = wr;
2366 goto out;
2367 }
2368 err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2369 if (unlikely(err)) {
2370 *bad_wr = wr;
2371 goto out;
2372 }
2373 wqe += seglen;
2374 size += seglen / 16;
2375 /* to start tunnel header on a cache-line boundary */
2376 add_zero_len_inline(wqe);
2377 wqe += 16;
2378 size++;
2379 build_tunnel_header(wr, wqe, &seglen);
2380 wqe += seglen;
2381 size += seglen / 16;
2382 break;
2383 case MLX4_IB_QPT_PROXY_SMI:
2384 /* don't allow QP0 sends on guests */
2385 err = -ENOSYS;
2386 *bad_wr = wr;
2387 goto out;
2388 case MLX4_IB_QPT_PROXY_GSI:
2389 /* If we are tunneling special qps, this is a UD qp.
2390 * In this case we first add a UD segment targeting
2391 * the tunnel qp, and then add a header with address
2392 * information */
2393 set_tunnel_datagram_seg(to_mdev(ibqp->device), wqe, wr, ibqp->qp_type);
2394 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2395 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2396 build_tunnel_header(wr, wqe, &seglen);
2397 wqe += seglen;
2398 size += seglen / 16;
2399 break;
2400
2401 case MLX4_IB_QPT_SMI:
2402 case MLX4_IB_QPT_GSI:
2403 err = build_mlx_header(to_msqp(qp), wr, ctrl, &seglen);
2404 if (unlikely(err)) {
2405 *bad_wr = wr;
2406 goto out;
2407 }
2408 wqe += seglen;
2409 size += seglen / 16;
2410 break;
2411
2412 default:
2413 break;
2414 }
2415
2416 /*
2417 * Write data segments in reverse order, so as to
2418 * overwrite cacheline stamp last within each
2419 * cacheline. This avoids issues with WQE
2420 * prefetching.
2421 */
2422
2423 dseg = wqe;
2424 dseg += wr->num_sge - 1;
2425 size += wr->num_sge * (sizeof (struct mlx4_wqe_data_seg) / 16);
2426
2427 /* Add one more inline data segment for ICRC for MLX sends */
2428 if (unlikely(qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
2429 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI ||
2430 qp->mlx4_ib_qp_type &
2431 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))) {
2432 set_mlx_icrc_seg(dseg + 1);
2433 size += sizeof (struct mlx4_wqe_data_seg) / 16;
2434 }
2435
2436 for (i = wr->num_sge - 1; i >= 0; --i, --dseg)
2437 set_data_seg(dseg, wr->sg_list + i);
2438
2439 /*
2440 * Possibly overwrite stamping in cacheline with LSO
2441 * segment only after making sure all data segments
2442 * are written.
2443 */
2444 wmb();
2445 *lso_wqe = lso_hdr_sz;
2446
2447 ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ?
2448 MLX4_WQE_CTRL_FENCE : 0) | size;
2449
2450 /*
2451 * Make sure descriptor is fully written before
2452 * setting ownership bit (because HW can start
2453 * executing as soon as we do).
2454 */
2455 wmb();
2456
2457 if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) {
2458 *bad_wr = wr;
2459 err = -EINVAL;
2460 goto out;
2461 }
2462
2463 ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] |
2464 (ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0) | blh;
2465
2466 stamp = ind + qp->sq_spare_wqes;
2467 ind += DIV_ROUND_UP(size * 16, 1U << qp->sq.wqe_shift);
2468
2469 /*
2470 * We can improve latency by not stamping the last
2471 * send queue WQE until after ringing the doorbell, so
2472 * only stamp here if there are still more WQEs to post.
2473 *
2474 * Same optimization applies to padding with NOP wqe
2475 * in case of WQE shrinking (used to prevent wrap-around
2476 * in the middle of WR).
2477 */
2478 if (wr->next) {
2479 stamp_send_wqe(qp, stamp, size * 16);
2480 ind = pad_wraparound(qp, ind);
2481 }
2482 }
2483
2484 out:
2485 if (likely(nreq)) {
2486 qp->sq.head += nreq;
2487
2488 /*
2489 * Make sure that descriptors are written before
2490 * doorbell record.
2491 */
2492 wmb();
2493
2494 writel(qp->doorbell_qpn,
2495 to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL);
2496
2497 /*
2498 * Make sure doorbells don't leak out of SQ spinlock
2499 * and reach the HCA out of order.
2500 */
2501 mmiowb();
2502
2503 stamp_send_wqe(qp, stamp, size * 16);
2504
2505 ind = pad_wraparound(qp, ind);
2506 qp->sq_next_wqe = ind;
2507 }
2508
2509 spin_unlock_irqrestore(&qp->sq.lock, flags);
2510
2511 return err;
2512 }
2513
2514 int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
2515 struct ib_recv_wr **bad_wr)
2516 {
2517 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2518 struct mlx4_wqe_data_seg *scat;
2519 unsigned long flags;
2520 int err = 0;
2521 int nreq;
2522 int ind;
2523 int max_gs;
2524 int i;
2525
2526 max_gs = qp->rq.max_gs;
2527 spin_lock_irqsave(&qp->rq.lock, flags);
2528
2529 ind = qp->rq.head & (qp->rq.wqe_cnt - 1);
2530
2531 for (nreq = 0; wr; ++nreq, wr = wr->next) {
2532 if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
2533 err = -ENOMEM;
2534 *bad_wr = wr;
2535 goto out;
2536 }
2537
2538 if (unlikely(wr->num_sge > qp->rq.max_gs)) {
2539 err = -EINVAL;
2540 *bad_wr = wr;
2541 goto out;
2542 }
2543
2544 scat = get_recv_wqe(qp, ind);
2545
2546 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
2547 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
2548 ib_dma_sync_single_for_device(ibqp->device,
2549 qp->sqp_proxy_rcv[ind].map,
2550 sizeof (struct mlx4_ib_proxy_sqp_hdr),
2551 DMA_FROM_DEVICE);
2552 scat->byte_count =
2553 cpu_to_be32(sizeof (struct mlx4_ib_proxy_sqp_hdr));
2554 /* use dma lkey from upper layer entry */
2555 scat->lkey = cpu_to_be32(wr->sg_list->lkey);
2556 scat->addr = cpu_to_be64(qp->sqp_proxy_rcv[ind].map);
2557 scat++;
2558 max_gs--;
2559 }
2560
2561 for (i = 0; i < wr->num_sge; ++i)
2562 __set_data_seg(scat + i, wr->sg_list + i);
2563
2564 if (i < max_gs) {
2565 scat[i].byte_count = 0;
2566 scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY);
2567 scat[i].addr = 0;
2568 }
2569
2570 qp->rq.wrid[ind] = wr->wr_id;
2571
2572 ind = (ind + 1) & (qp->rq.wqe_cnt - 1);
2573 }
2574
2575 out:
2576 if (likely(nreq)) {
2577 qp->rq.head += nreq;
2578
2579 /*
2580 * Make sure that descriptors are written before
2581 * doorbell record.
2582 */
2583 wmb();
2584
2585 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
2586 }
2587
2588 spin_unlock_irqrestore(&qp->rq.lock, flags);
2589
2590 return err;
2591 }
2592
2593 static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state)
2594 {
2595 switch (mlx4_state) {
2596 case MLX4_QP_STATE_RST: return IB_QPS_RESET;
2597 case MLX4_QP_STATE_INIT: return IB_QPS_INIT;
2598 case MLX4_QP_STATE_RTR: return IB_QPS_RTR;
2599 case MLX4_QP_STATE_RTS: return IB_QPS_RTS;
2600 case MLX4_QP_STATE_SQ_DRAINING:
2601 case MLX4_QP_STATE_SQD: return IB_QPS_SQD;
2602 case MLX4_QP_STATE_SQER: return IB_QPS_SQE;
2603 case MLX4_QP_STATE_ERR: return IB_QPS_ERR;
2604 default: return -1;
2605 }
2606 }
2607
2608 static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state)
2609 {
2610 switch (mlx4_mig_state) {
2611 case MLX4_QP_PM_ARMED: return IB_MIG_ARMED;
2612 case MLX4_QP_PM_REARM: return IB_MIG_REARM;
2613 case MLX4_QP_PM_MIGRATED: return IB_MIG_MIGRATED;
2614 default: return -1;
2615 }
2616 }
2617
2618 static int to_ib_qp_access_flags(int mlx4_flags)
2619 {
2620 int ib_flags = 0;
2621
2622 if (mlx4_flags & MLX4_QP_BIT_RRE)
2623 ib_flags |= IB_ACCESS_REMOTE_READ;
2624 if (mlx4_flags & MLX4_QP_BIT_RWE)
2625 ib_flags |= IB_ACCESS_REMOTE_WRITE;
2626 if (mlx4_flags & MLX4_QP_BIT_RAE)
2627 ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
2628
2629 return ib_flags;
2630 }
2631
2632 static void to_ib_ah_attr(struct mlx4_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr,
2633 struct mlx4_qp_path *path)
2634 {
2635 struct mlx4_dev *dev = ibdev->dev;
2636 int is_eth;
2637
2638 memset(ib_ah_attr, 0, sizeof *ib_ah_attr);
2639 ib_ah_attr->port_num = path->sched_queue & 0x40 ? 2 : 1;
2640
2641 if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports)
2642 return;
2643
2644 is_eth = rdma_port_get_link_layer(&ibdev->ib_dev, ib_ah_attr->port_num) ==
2645 IB_LINK_LAYER_ETHERNET;
2646 if (is_eth)
2647 ib_ah_attr->sl = ((path->sched_queue >> 3) & 0x7) |
2648 ((path->sched_queue & 4) << 1);
2649 else
2650 ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf;
2651
2652 ib_ah_attr->dlid = be16_to_cpu(path->rlid);
2653 ib_ah_attr->src_path_bits = path->grh_mylmc & 0x7f;
2654 ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0;
2655 ib_ah_attr->ah_flags = (path->grh_mylmc & (1 << 7)) ? IB_AH_GRH : 0;
2656 if (ib_ah_attr->ah_flags) {
2657 ib_ah_attr->grh.sgid_index = path->mgid_index;
2658 ib_ah_attr->grh.hop_limit = path->hop_limit;
2659 ib_ah_attr->grh.traffic_class =
2660 (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff;
2661 ib_ah_attr->grh.flow_label =
2662 be32_to_cpu(path->tclass_flowlabel) & 0xfffff;
2663 memcpy(ib_ah_attr->grh.dgid.raw,
2664 path->rgid, sizeof ib_ah_attr->grh.dgid.raw);
2665 }
2666 }
2667
2668 int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
2669 struct ib_qp_init_attr *qp_init_attr)
2670 {
2671 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
2672 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2673 struct mlx4_qp_context context;
2674 int mlx4_state;
2675 int err = 0;
2676
2677 mutex_lock(&qp->mutex);
2678
2679 if (qp->state == IB_QPS_RESET) {
2680 qp_attr->qp_state = IB_QPS_RESET;
2681 goto done;
2682 }
2683
2684 err = mlx4_qp_query(dev->dev, &qp->mqp, &context);
2685 if (err) {
2686 err = -EINVAL;
2687 goto out;
2688 }
2689
2690 mlx4_state = be32_to_cpu(context.flags) >> 28;
2691
2692 qp->state = to_ib_qp_state(mlx4_state);
2693 qp_attr->qp_state = qp->state;
2694 qp_attr->path_mtu = context.mtu_msgmax >> 5;
2695 qp_attr->path_mig_state =
2696 to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3);
2697 qp_attr->qkey = be32_to_cpu(context.qkey);
2698 qp_attr->rq_psn = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff;
2699 qp_attr->sq_psn = be32_to_cpu(context.next_send_psn) & 0xffffff;
2700 qp_attr->dest_qp_num = be32_to_cpu(context.remote_qpn) & 0xffffff;
2701 qp_attr->qp_access_flags =
2702 to_ib_qp_access_flags(be32_to_cpu(context.params2));
2703
2704 if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) {
2705 to_ib_ah_attr(dev, &qp_attr->ah_attr, &context.pri_path);
2706 to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context.alt_path);
2707 qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f;
2708 qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num;
2709 }
2710
2711 qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f;
2712 if (qp_attr->qp_state == IB_QPS_INIT)
2713 qp_attr->port_num = qp->port;
2714 else
2715 qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1;
2716
2717 /* qp_attr->en_sqd_async_notify is only applicable in modify qp */
2718 qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING;
2719
2720 qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7);
2721
2722 qp_attr->max_dest_rd_atomic =
2723 1 << ((be32_to_cpu(context.params2) >> 21) & 0x7);
2724 qp_attr->min_rnr_timer =
2725 (be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f;
2726 qp_attr->timeout = context.pri_path.ackto >> 3;
2727 qp_attr->retry_cnt = (be32_to_cpu(context.params1) >> 16) & 0x7;
2728 qp_attr->rnr_retry = (be32_to_cpu(context.params1) >> 13) & 0x7;
2729 qp_attr->alt_timeout = context.alt_path.ackto >> 3;
2730
2731 done:
2732 qp_attr->cur_qp_state = qp_attr->qp_state;
2733 qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt;
2734 qp_attr->cap.max_recv_sge = qp->rq.max_gs;
2735
2736 if (!ibqp->uobject) {
2737 qp_attr->cap.max_send_wr = qp->sq.wqe_cnt;
2738 qp_attr->cap.max_send_sge = qp->sq.max_gs;
2739 } else {
2740 qp_attr->cap.max_send_wr = 0;
2741 qp_attr->cap.max_send_sge = 0;
2742 }
2743
2744 /*
2745 * We don't support inline sends for kernel QPs (yet), and we
2746 * don't know what userspace's value should be.
2747 */
2748 qp_attr->cap.max_inline_data = 0;
2749
2750 qp_init_attr->cap = qp_attr->cap;
2751
2752 qp_init_attr->create_flags = 0;
2753 if (qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK)
2754 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
2755
2756 if (qp->flags & MLX4_IB_QP_LSO)
2757 qp_init_attr->create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
2758
2759 qp_init_attr->sq_sig_type =
2760 qp->sq_signal_bits == cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) ?
2761 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
2762
2763 out:
2764 mutex_unlock(&qp->mutex);
2765 return err;
2766 }
2767
kernel source for telekom puls (alcatel/mediatek)