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IB/mlx4: Avoid accessing netdevice when building RoCE qp1 header
[deliverable/linux.git] / drivers / infiniband / hw / mlx4 / qp.c
1 /*
2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34 #include <linux/log2.h>
35 #include <linux/slab.h>
36 #include <linux/netdevice.h>
37
38 #include <rdma/ib_cache.h>
39 #include <rdma/ib_pack.h>
40 #include <rdma/ib_addr.h>
41 #include <rdma/ib_mad.h>
42
43 #include <linux/mlx4/qp.h>
44
45 #include "mlx4_ib.h"
46 #include "user.h"
47
48 enum {
49 MLX4_IB_ACK_REQ_FREQ = 8,
50 };
51
52 enum {
53 MLX4_IB_DEFAULT_SCHED_QUEUE = 0x83,
54 MLX4_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f,
55 MLX4_IB_LINK_TYPE_IB = 0,
56 MLX4_IB_LINK_TYPE_ETH = 1
57 };
58
59 enum {
60 /*
61 * Largest possible UD header: send with GRH and immediate
62 * data plus 18 bytes for an Ethernet header with VLAN/802.1Q
63 * tag. (LRH would only use 8 bytes, so Ethernet is the
64 * biggest case)
65 */
66 MLX4_IB_UD_HEADER_SIZE = 82,
67 MLX4_IB_LSO_HEADER_SPARE = 128,
68 };
69
70 enum {
71 MLX4_IB_IBOE_ETHERTYPE = 0x8915
72 };
73
74 struct mlx4_ib_sqp {
75 struct mlx4_ib_qp qp;
76 int pkey_index;
77 u32 qkey;
78 u32 send_psn;
79 struct ib_ud_header ud_header;
80 u8 header_buf[MLX4_IB_UD_HEADER_SIZE];
81 };
82
83 enum {
84 MLX4_IB_MIN_SQ_STRIDE = 6,
85 MLX4_IB_CACHE_LINE_SIZE = 64,
86 };
87
88 enum {
89 MLX4_RAW_QP_MTU = 7,
90 MLX4_RAW_QP_MSGMAX = 31,
91 };
92
93 #ifndef ETH_ALEN
94 #define ETH_ALEN 6
95 #endif
96 static inline u64 mlx4_mac_to_u64(u8 *addr)
97 {
98 u64 mac = 0;
99 int i;
100
101 for (i = 0; i < ETH_ALEN; i++) {
102 mac <<= 8;
103 mac |= addr[i];
104 }
105 return mac;
106 }
107
108 static const __be32 mlx4_ib_opcode[] = {
109 [IB_WR_SEND] = cpu_to_be32(MLX4_OPCODE_SEND),
110 [IB_WR_LSO] = cpu_to_be32(MLX4_OPCODE_LSO),
111 [IB_WR_SEND_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_SEND_IMM),
112 [IB_WR_RDMA_WRITE] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE),
113 [IB_WR_RDMA_WRITE_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE_IMM),
114 [IB_WR_RDMA_READ] = cpu_to_be32(MLX4_OPCODE_RDMA_READ),
115 [IB_WR_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_ATOMIC_CS),
116 [IB_WR_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_ATOMIC_FA),
117 [IB_WR_SEND_WITH_INV] = cpu_to_be32(MLX4_OPCODE_SEND_INVAL),
118 [IB_WR_LOCAL_INV] = cpu_to_be32(MLX4_OPCODE_LOCAL_INVAL),
119 [IB_WR_FAST_REG_MR] = cpu_to_be32(MLX4_OPCODE_FMR),
120 [IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_CS),
121 [IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_FA),
122 [IB_WR_BIND_MW] = cpu_to_be32(MLX4_OPCODE_BIND_MW),
123 };
124
125 static struct mlx4_ib_sqp *to_msqp(struct mlx4_ib_qp *mqp)
126 {
127 return container_of(mqp, struct mlx4_ib_sqp, qp);
128 }
129
130 static int is_tunnel_qp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
131 {
132 if (!mlx4_is_master(dev->dev))
133 return 0;
134
135 return qp->mqp.qpn >= dev->dev->phys_caps.base_tunnel_sqpn &&
136 qp->mqp.qpn < dev->dev->phys_caps.base_tunnel_sqpn +
137 8 * MLX4_MFUNC_MAX;
138 }
139
140 static int is_sqp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
141 {
142 int proxy_sqp = 0;
143 int real_sqp = 0;
144 int i;
145 /* PPF or Native -- real SQP */
146 real_sqp = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) &&
147 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn &&
148 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 3);
149 if (real_sqp)
150 return 1;
151 /* VF or PF -- proxy SQP */
152 if (mlx4_is_mfunc(dev->dev)) {
153 for (i = 0; i < dev->dev->caps.num_ports; i++) {
154 if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i] ||
155 qp->mqp.qpn == dev->dev->caps.qp1_proxy[i]) {
156 proxy_sqp = 1;
157 break;
158 }
159 }
160 }
161 return proxy_sqp;
162 }
163
164 /* used for INIT/CLOSE port logic */
165 static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
166 {
167 int proxy_qp0 = 0;
168 int real_qp0 = 0;
169 int i;
170 /* PPF or Native -- real QP0 */
171 real_qp0 = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) &&
172 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn &&
173 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 1);
174 if (real_qp0)
175 return 1;
176 /* VF or PF -- proxy QP0 */
177 if (mlx4_is_mfunc(dev->dev)) {
178 for (i = 0; i < dev->dev->caps.num_ports; i++) {
179 if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i]) {
180 proxy_qp0 = 1;
181 break;
182 }
183 }
184 }
185 return proxy_qp0;
186 }
187
188 static void *get_wqe(struct mlx4_ib_qp *qp, int offset)
189 {
190 return mlx4_buf_offset(&qp->buf, offset);
191 }
192
193 static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n)
194 {
195 return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift));
196 }
197
198 static void *get_send_wqe(struct mlx4_ib_qp *qp, int n)
199 {
200 return get_wqe(qp, qp->sq.offset + (n << qp->sq.wqe_shift));
201 }
202
203 /*
204 * Stamp a SQ WQE so that it is invalid if prefetched by marking the
205 * first four bytes of every 64 byte chunk with
206 * 0x7FFFFFF | (invalid_ownership_value << 31).
207 *
208 * When the max work request size is less than or equal to the WQE
209 * basic block size, as an optimization, we can stamp all WQEs with
210 * 0xffffffff, and skip the very first chunk of each WQE.
211 */
212 static void stamp_send_wqe(struct mlx4_ib_qp *qp, int n, int size)
213 {
214 __be32 *wqe;
215 int i;
216 int s;
217 int ind;
218 void *buf;
219 __be32 stamp;
220 struct mlx4_wqe_ctrl_seg *ctrl;
221
222 if (qp->sq_max_wqes_per_wr > 1) {
223 s = roundup(size, 1U << qp->sq.wqe_shift);
224 for (i = 0; i < s; i += 64) {
225 ind = (i >> qp->sq.wqe_shift) + n;
226 stamp = ind & qp->sq.wqe_cnt ? cpu_to_be32(0x7fffffff) :
227 cpu_to_be32(0xffffffff);
228 buf = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
229 wqe = buf + (i & ((1 << qp->sq.wqe_shift) - 1));
230 *wqe = stamp;
231 }
232 } else {
233 ctrl = buf = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
234 s = (ctrl->fence_size & 0x3f) << 4;
235 for (i = 64; i < s; i += 64) {
236 wqe = buf + i;
237 *wqe = cpu_to_be32(0xffffffff);
238 }
239 }
240 }
241
242 static void post_nop_wqe(struct mlx4_ib_qp *qp, int n, int size)
243 {
244 struct mlx4_wqe_ctrl_seg *ctrl;
245 struct mlx4_wqe_inline_seg *inl;
246 void *wqe;
247 int s;
248
249 ctrl = wqe = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
250 s = sizeof(struct mlx4_wqe_ctrl_seg);
251
252 if (qp->ibqp.qp_type == IB_QPT_UD) {
253 struct mlx4_wqe_datagram_seg *dgram = wqe + sizeof *ctrl;
254 struct mlx4_av *av = (struct mlx4_av *)dgram->av;
255 memset(dgram, 0, sizeof *dgram);
256 av->port_pd = cpu_to_be32((qp->port << 24) | to_mpd(qp->ibqp.pd)->pdn);
257 s += sizeof(struct mlx4_wqe_datagram_seg);
258 }
259
260 /* Pad the remainder of the WQE with an inline data segment. */
261 if (size > s) {
262 inl = wqe + s;
263 inl->byte_count = cpu_to_be32(1 << 31 | (size - s - sizeof *inl));
264 }
265 ctrl->srcrb_flags = 0;
266 ctrl->fence_size = size / 16;
267 /*
268 * Make sure descriptor is fully written before setting ownership bit
269 * (because HW can start executing as soon as we do).
270 */
271 wmb();
272
273 ctrl->owner_opcode = cpu_to_be32(MLX4_OPCODE_NOP | MLX4_WQE_CTRL_NEC) |
274 (n & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0);
275
276 stamp_send_wqe(qp, n + qp->sq_spare_wqes, size);
277 }
278
279 /* Post NOP WQE to prevent wrap-around in the middle of WR */
280 static inline unsigned pad_wraparound(struct mlx4_ib_qp *qp, int ind)
281 {
282 unsigned s = qp->sq.wqe_cnt - (ind & (qp->sq.wqe_cnt - 1));
283 if (unlikely(s < qp->sq_max_wqes_per_wr)) {
284 post_nop_wqe(qp, ind, s << qp->sq.wqe_shift);
285 ind += s;
286 }
287 return ind;
288 }
289
290 static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type)
291 {
292 struct ib_event event;
293 struct ib_qp *ibqp = &to_mibqp(qp)->ibqp;
294
295 if (type == MLX4_EVENT_TYPE_PATH_MIG)
296 to_mibqp(qp)->port = to_mibqp(qp)->alt_port;
297
298 if (ibqp->event_handler) {
299 event.device = ibqp->device;
300 event.element.qp = ibqp;
301 switch (type) {
302 case MLX4_EVENT_TYPE_PATH_MIG:
303 event.event = IB_EVENT_PATH_MIG;
304 break;
305 case MLX4_EVENT_TYPE_COMM_EST:
306 event.event = IB_EVENT_COMM_EST;
307 break;
308 case MLX4_EVENT_TYPE_SQ_DRAINED:
309 event.event = IB_EVENT_SQ_DRAINED;
310 break;
311 case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
312 event.event = IB_EVENT_QP_LAST_WQE_REACHED;
313 break;
314 case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
315 event.event = IB_EVENT_QP_FATAL;
316 break;
317 case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
318 event.event = IB_EVENT_PATH_MIG_ERR;
319 break;
320 case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
321 event.event = IB_EVENT_QP_REQ_ERR;
322 break;
323 case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
324 event.event = IB_EVENT_QP_ACCESS_ERR;
325 break;
326 default:
327 pr_warn("Unexpected event type %d "
328 "on QP %06x\n", type, qp->qpn);
329 return;
330 }
331
332 ibqp->event_handler(&event, ibqp->qp_context);
333 }
334 }
335
336 static int send_wqe_overhead(enum mlx4_ib_qp_type type, u32 flags)
337 {
338 /*
339 * UD WQEs must have a datagram segment.
340 * RC and UC WQEs might have a remote address segment.
341 * MLX WQEs need two extra inline data segments (for the UD
342 * header and space for the ICRC).
343 */
344 switch (type) {
345 case MLX4_IB_QPT_UD:
346 return sizeof (struct mlx4_wqe_ctrl_seg) +
347 sizeof (struct mlx4_wqe_datagram_seg) +
348 ((flags & MLX4_IB_QP_LSO) ? MLX4_IB_LSO_HEADER_SPARE : 0);
349 case MLX4_IB_QPT_PROXY_SMI_OWNER:
350 case MLX4_IB_QPT_PROXY_SMI:
351 case MLX4_IB_QPT_PROXY_GSI:
352 return sizeof (struct mlx4_wqe_ctrl_seg) +
353 sizeof (struct mlx4_wqe_datagram_seg) + 64;
354 case MLX4_IB_QPT_TUN_SMI_OWNER:
355 case MLX4_IB_QPT_TUN_GSI:
356 return sizeof (struct mlx4_wqe_ctrl_seg) +
357 sizeof (struct mlx4_wqe_datagram_seg);
358
359 case MLX4_IB_QPT_UC:
360 return sizeof (struct mlx4_wqe_ctrl_seg) +
361 sizeof (struct mlx4_wqe_raddr_seg);
362 case MLX4_IB_QPT_RC:
363 return sizeof (struct mlx4_wqe_ctrl_seg) +
364 sizeof (struct mlx4_wqe_atomic_seg) +
365 sizeof (struct mlx4_wqe_raddr_seg);
366 case MLX4_IB_QPT_SMI:
367 case MLX4_IB_QPT_GSI:
368 return sizeof (struct mlx4_wqe_ctrl_seg) +
369 ALIGN(MLX4_IB_UD_HEADER_SIZE +
370 DIV_ROUND_UP(MLX4_IB_UD_HEADER_SIZE,
371 MLX4_INLINE_ALIGN) *
372 sizeof (struct mlx4_wqe_inline_seg),
373 sizeof (struct mlx4_wqe_data_seg)) +
374 ALIGN(4 +
375 sizeof (struct mlx4_wqe_inline_seg),
376 sizeof (struct mlx4_wqe_data_seg));
377 default:
378 return sizeof (struct mlx4_wqe_ctrl_seg);
379 }
380 }
381
382 static int set_rq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
383 int is_user, int has_rq, struct mlx4_ib_qp *qp)
384 {
385 /* Sanity check RQ size before proceeding */
386 if (cap->max_recv_wr > dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE ||
387 cap->max_recv_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg))
388 return -EINVAL;
389
390 if (!has_rq) {
391 if (cap->max_recv_wr)
392 return -EINVAL;
393
394 qp->rq.wqe_cnt = qp->rq.max_gs = 0;
395 } else {
396 /* HW requires >= 1 RQ entry with >= 1 gather entry */
397 if (is_user && (!cap->max_recv_wr || !cap->max_recv_sge))
398 return -EINVAL;
399
400 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, cap->max_recv_wr));
401 qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge));
402 qp->rq.wqe_shift = ilog2(qp->rq.max_gs * sizeof (struct mlx4_wqe_data_seg));
403 }
404
405 /* leave userspace return values as they were, so as not to break ABI */
406 if (is_user) {
407 cap->max_recv_wr = qp->rq.max_post = qp->rq.wqe_cnt;
408 cap->max_recv_sge = qp->rq.max_gs;
409 } else {
410 cap->max_recv_wr = qp->rq.max_post =
411 min(dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE, qp->rq.wqe_cnt);
412 cap->max_recv_sge = min(qp->rq.max_gs,
413 min(dev->dev->caps.max_sq_sg,
414 dev->dev->caps.max_rq_sg));
415 }
416
417 return 0;
418 }
419
420 static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
421 enum mlx4_ib_qp_type type, struct mlx4_ib_qp *qp)
422 {
423 int s;
424
425 /* Sanity check SQ size before proceeding */
426 if (cap->max_send_wr > (dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE) ||
427 cap->max_send_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg) ||
428 cap->max_inline_data + send_wqe_overhead(type, qp->flags) +
429 sizeof (struct mlx4_wqe_inline_seg) > dev->dev->caps.max_sq_desc_sz)
430 return -EINVAL;
431
432 /*
433 * For MLX transport we need 2 extra S/G entries:
434 * one for the header and one for the checksum at the end
435 */
436 if ((type == MLX4_IB_QPT_SMI || type == MLX4_IB_QPT_GSI ||
437 type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) &&
438 cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg)
439 return -EINVAL;
440
441 s = max(cap->max_send_sge * sizeof (struct mlx4_wqe_data_seg),
442 cap->max_inline_data + sizeof (struct mlx4_wqe_inline_seg)) +
443 send_wqe_overhead(type, qp->flags);
444
445 if (s > dev->dev->caps.max_sq_desc_sz)
446 return -EINVAL;
447
448 /*
449 * Hermon supports shrinking WQEs, such that a single work
450 * request can include multiple units of 1 << wqe_shift. This
451 * way, work requests can differ in size, and do not have to
452 * be a power of 2 in size, saving memory and speeding up send
453 * WR posting. Unfortunately, if we do this then the
454 * wqe_index field in CQEs can't be used to look up the WR ID
455 * anymore, so we do this only if selective signaling is off.
456 *
457 * Further, on 32-bit platforms, we can't use vmap() to make
458 * the QP buffer virtually contiguous. Thus we have to use
459 * constant-sized WRs to make sure a WR is always fully within
460 * a single page-sized chunk.
461 *
462 * Finally, we use NOP work requests to pad the end of the
463 * work queue, to avoid wrap-around in the middle of WR. We
464 * set NEC bit to avoid getting completions with error for
465 * these NOP WRs, but since NEC is only supported starting
466 * with firmware 2.2.232, we use constant-sized WRs for older
467 * firmware.
468 *
469 * And, since MLX QPs only support SEND, we use constant-sized
470 * WRs in this case.
471 *
472 * We look for the smallest value of wqe_shift such that the
473 * resulting number of wqes does not exceed device
474 * capabilities.
475 *
476 * We set WQE size to at least 64 bytes, this way stamping
477 * invalidates each WQE.
478 */
479 if (dev->dev->caps.fw_ver >= MLX4_FW_VER_WQE_CTRL_NEC &&
480 qp->sq_signal_bits && BITS_PER_LONG == 64 &&
481 type != MLX4_IB_QPT_SMI && type != MLX4_IB_QPT_GSI &&
482 !(type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_PROXY_SMI |
483 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER)))
484 qp->sq.wqe_shift = ilog2(64);
485 else
486 qp->sq.wqe_shift = ilog2(roundup_pow_of_two(s));
487
488 for (;;) {
489 qp->sq_max_wqes_per_wr = DIV_ROUND_UP(s, 1U << qp->sq.wqe_shift);
490
491 /*
492 * We need to leave 2 KB + 1 WR of headroom in the SQ to
493 * allow HW to prefetch.
494 */
495 qp->sq_spare_wqes = (2048 >> qp->sq.wqe_shift) + qp->sq_max_wqes_per_wr;
496 qp->sq.wqe_cnt = roundup_pow_of_two(cap->max_send_wr *
497 qp->sq_max_wqes_per_wr +
498 qp->sq_spare_wqes);
499
500 if (qp->sq.wqe_cnt <= dev->dev->caps.max_wqes)
501 break;
502
503 if (qp->sq_max_wqes_per_wr <= 1)
504 return -EINVAL;
505
506 ++qp->sq.wqe_shift;
507 }
508
509 qp->sq.max_gs = (min(dev->dev->caps.max_sq_desc_sz,
510 (qp->sq_max_wqes_per_wr << qp->sq.wqe_shift)) -
511 send_wqe_overhead(type, qp->flags)) /
512 sizeof (struct mlx4_wqe_data_seg);
513
514 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
515 (qp->sq.wqe_cnt << qp->sq.wqe_shift);
516 if (qp->rq.wqe_shift > qp->sq.wqe_shift) {
517 qp->rq.offset = 0;
518 qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift;
519 } else {
520 qp->rq.offset = qp->sq.wqe_cnt << qp->sq.wqe_shift;
521 qp->sq.offset = 0;
522 }
523
524 cap->max_send_wr = qp->sq.max_post =
525 (qp->sq.wqe_cnt - qp->sq_spare_wqes) / qp->sq_max_wqes_per_wr;
526 cap->max_send_sge = min(qp->sq.max_gs,
527 min(dev->dev->caps.max_sq_sg,
528 dev->dev->caps.max_rq_sg));
529 /* We don't support inline sends for kernel QPs (yet) */
530 cap->max_inline_data = 0;
531
532 return 0;
533 }
534
535 static int set_user_sq_size(struct mlx4_ib_dev *dev,
536 struct mlx4_ib_qp *qp,
537 struct mlx4_ib_create_qp *ucmd)
538 {
539 /* Sanity check SQ size before proceeding */
540 if ((1 << ucmd->log_sq_bb_count) > dev->dev->caps.max_wqes ||
541 ucmd->log_sq_stride >
542 ilog2(roundup_pow_of_two(dev->dev->caps.max_sq_desc_sz)) ||
543 ucmd->log_sq_stride < MLX4_IB_MIN_SQ_STRIDE)
544 return -EINVAL;
545
546 qp->sq.wqe_cnt = 1 << ucmd->log_sq_bb_count;
547 qp->sq.wqe_shift = ucmd->log_sq_stride;
548
549 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
550 (qp->sq.wqe_cnt << qp->sq.wqe_shift);
551
552 return 0;
553 }
554
555 static int alloc_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp)
556 {
557 int i;
558
559 qp->sqp_proxy_rcv =
560 kmalloc(sizeof (struct mlx4_ib_buf) * qp->rq.wqe_cnt,
561 GFP_KERNEL);
562 if (!qp->sqp_proxy_rcv)
563 return -ENOMEM;
564 for (i = 0; i < qp->rq.wqe_cnt; i++) {
565 qp->sqp_proxy_rcv[i].addr =
566 kmalloc(sizeof (struct mlx4_ib_proxy_sqp_hdr),
567 GFP_KERNEL);
568 if (!qp->sqp_proxy_rcv[i].addr)
569 goto err;
570 qp->sqp_proxy_rcv[i].map =
571 ib_dma_map_single(dev, qp->sqp_proxy_rcv[i].addr,
572 sizeof (struct mlx4_ib_proxy_sqp_hdr),
573 DMA_FROM_DEVICE);
574 }
575 return 0;
576
577 err:
578 while (i > 0) {
579 --i;
580 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map,
581 sizeof (struct mlx4_ib_proxy_sqp_hdr),
582 DMA_FROM_DEVICE);
583 kfree(qp->sqp_proxy_rcv[i].addr);
584 }
585 kfree(qp->sqp_proxy_rcv);
586 qp->sqp_proxy_rcv = NULL;
587 return -ENOMEM;
588 }
589
590 static void free_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp)
591 {
592 int i;
593
594 for (i = 0; i < qp->rq.wqe_cnt; i++) {
595 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map,
596 sizeof (struct mlx4_ib_proxy_sqp_hdr),
597 DMA_FROM_DEVICE);
598 kfree(qp->sqp_proxy_rcv[i].addr);
599 }
600 kfree(qp->sqp_proxy_rcv);
601 }
602
603 static int qp_has_rq(struct ib_qp_init_attr *attr)
604 {
605 if (attr->qp_type == IB_QPT_XRC_INI || attr->qp_type == IB_QPT_XRC_TGT)
606 return 0;
607
608 return !attr->srq;
609 }
610
611 static int qp0_enabled_vf(struct mlx4_dev *dev, int qpn)
612 {
613 int i;
614 for (i = 0; i < dev->caps.num_ports; i++) {
615 if (qpn == dev->caps.qp0_proxy[i])
616 return !!dev->caps.qp0_qkey[i];
617 }
618 return 0;
619 }
620
621 static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
622 struct ib_qp_init_attr *init_attr,
623 struct ib_udata *udata, int sqpn, struct mlx4_ib_qp **caller_qp,
624 gfp_t gfp)
625 {
626 int qpn;
627 int err;
628 struct mlx4_ib_sqp *sqp;
629 struct mlx4_ib_qp *qp;
630 enum mlx4_ib_qp_type qp_type = (enum mlx4_ib_qp_type) init_attr->qp_type;
631
632 /* When tunneling special qps, we use a plain UD qp */
633 if (sqpn) {
634 if (mlx4_is_mfunc(dev->dev) &&
635 (!mlx4_is_master(dev->dev) ||
636 !(init_attr->create_flags & MLX4_IB_SRIOV_SQP))) {
637 if (init_attr->qp_type == IB_QPT_GSI)
638 qp_type = MLX4_IB_QPT_PROXY_GSI;
639 else {
640 if (mlx4_is_master(dev->dev) ||
641 qp0_enabled_vf(dev->dev, sqpn))
642 qp_type = MLX4_IB_QPT_PROXY_SMI_OWNER;
643 else
644 qp_type = MLX4_IB_QPT_PROXY_SMI;
645 }
646 }
647 qpn = sqpn;
648 /* add extra sg entry for tunneling */
649 init_attr->cap.max_recv_sge++;
650 } else if (init_attr->create_flags & MLX4_IB_SRIOV_TUNNEL_QP) {
651 struct mlx4_ib_qp_tunnel_init_attr *tnl_init =
652 container_of(init_attr,
653 struct mlx4_ib_qp_tunnel_init_attr, init_attr);
654 if ((tnl_init->proxy_qp_type != IB_QPT_SMI &&
655 tnl_init->proxy_qp_type != IB_QPT_GSI) ||
656 !mlx4_is_master(dev->dev))
657 return -EINVAL;
658 if (tnl_init->proxy_qp_type == IB_QPT_GSI)
659 qp_type = MLX4_IB_QPT_TUN_GSI;
660 else if (tnl_init->slave == mlx4_master_func_num(dev->dev) ||
661 mlx4_vf_smi_enabled(dev->dev, tnl_init->slave,
662 tnl_init->port))
663 qp_type = MLX4_IB_QPT_TUN_SMI_OWNER;
664 else
665 qp_type = MLX4_IB_QPT_TUN_SMI;
666 /* we are definitely in the PPF here, since we are creating
667 * tunnel QPs. base_tunnel_sqpn is therefore valid. */
668 qpn = dev->dev->phys_caps.base_tunnel_sqpn + 8 * tnl_init->slave
669 + tnl_init->proxy_qp_type * 2 + tnl_init->port - 1;
670 sqpn = qpn;
671 }
672
673 if (!*caller_qp) {
674 if (qp_type == MLX4_IB_QPT_SMI || qp_type == MLX4_IB_QPT_GSI ||
675 (qp_type & (MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_SMI_OWNER |
676 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER))) {
677 sqp = kzalloc(sizeof (struct mlx4_ib_sqp), gfp);
678 if (!sqp)
679 return -ENOMEM;
680 qp = &sqp->qp;
681 qp->pri.vid = 0xFFFF;
682 qp->alt.vid = 0xFFFF;
683 } else {
684 qp = kzalloc(sizeof (struct mlx4_ib_qp), gfp);
685 if (!qp)
686 return -ENOMEM;
687 qp->pri.vid = 0xFFFF;
688 qp->alt.vid = 0xFFFF;
689 }
690 } else
691 qp = *caller_qp;
692
693 qp->mlx4_ib_qp_type = qp_type;
694
695 mutex_init(&qp->mutex);
696 spin_lock_init(&qp->sq.lock);
697 spin_lock_init(&qp->rq.lock);
698 INIT_LIST_HEAD(&qp->gid_list);
699 INIT_LIST_HEAD(&qp->steering_rules);
700
701 qp->state = IB_QPS_RESET;
702 if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
703 qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
704
705 err = set_rq_size(dev, &init_attr->cap, !!pd->uobject, qp_has_rq(init_attr), qp);
706 if (err)
707 goto err;
708
709 if (pd->uobject) {
710 struct mlx4_ib_create_qp ucmd;
711
712 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
713 err = -EFAULT;
714 goto err;
715 }
716
717 qp->sq_no_prefetch = ucmd.sq_no_prefetch;
718
719 err = set_user_sq_size(dev, qp, &ucmd);
720 if (err)
721 goto err;
722
723 qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
724 qp->buf_size, 0, 0);
725 if (IS_ERR(qp->umem)) {
726 err = PTR_ERR(qp->umem);
727 goto err;
728 }
729
730 err = mlx4_mtt_init(dev->dev, ib_umem_page_count(qp->umem),
731 ilog2(qp->umem->page_size), &qp->mtt);
732 if (err)
733 goto err_buf;
734
735 err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem);
736 if (err)
737 goto err_mtt;
738
739 if (qp_has_rq(init_attr)) {
740 err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context),
741 ucmd.db_addr, &qp->db);
742 if (err)
743 goto err_mtt;
744 }
745 } else {
746 qp->sq_no_prefetch = 0;
747
748 if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK)
749 qp->flags |= MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK;
750
751 if (init_attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO)
752 qp->flags |= MLX4_IB_QP_LSO;
753
754 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) {
755 if (dev->steering_support ==
756 MLX4_STEERING_MODE_DEVICE_MANAGED)
757 qp->flags |= MLX4_IB_QP_NETIF;
758 else
759 goto err;
760 }
761
762 err = set_kernel_sq_size(dev, &init_attr->cap, qp_type, qp);
763 if (err)
764 goto err;
765
766 if (qp_has_rq(init_attr)) {
767 err = mlx4_db_alloc(dev->dev, &qp->db, 0, gfp);
768 if (err)
769 goto err;
770
771 *qp->db.db = 0;
772 }
773
774 if (mlx4_buf_alloc(dev->dev, qp->buf_size, PAGE_SIZE * 2, &qp->buf, gfp)) {
775 err = -ENOMEM;
776 goto err_db;
777 }
778
779 err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift,
780 &qp->mtt);
781 if (err)
782 goto err_buf;
783
784 err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf, gfp);
785 if (err)
786 goto err_mtt;
787
788 qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof (u64), gfp);
789 qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof (u64), gfp);
790 if (!qp->sq.wrid || !qp->rq.wrid) {
791 err = -ENOMEM;
792 goto err_wrid;
793 }
794 }
795
796 if (sqpn) {
797 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
798 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
799 if (alloc_proxy_bufs(pd->device, qp)) {
800 err = -ENOMEM;
801 goto err_wrid;
802 }
803 }
804 } else {
805 /* Raw packet QPNs must be aligned to 8 bits. If not, the WQE
806 * BlueFlame setup flow wrongly causes VLAN insertion. */
807 if (init_attr->qp_type == IB_QPT_RAW_PACKET)
808 err = mlx4_qp_reserve_range(dev->dev, 1, 1 << 8, &qpn);
809 else
810 if (qp->flags & MLX4_IB_QP_NETIF)
811 err = mlx4_ib_steer_qp_alloc(dev, 1, &qpn);
812 else
813 err = mlx4_qp_reserve_range(dev->dev, 1, 1,
814 &qpn);
815 if (err)
816 goto err_proxy;
817 }
818
819 err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp, gfp);
820 if (err)
821 goto err_qpn;
822
823 if (init_attr->qp_type == IB_QPT_XRC_TGT)
824 qp->mqp.qpn |= (1 << 23);
825
826 /*
827 * Hardware wants QPN written in big-endian order (after
828 * shifting) for send doorbell. Precompute this value to save
829 * a little bit when posting sends.
830 */
831 qp->doorbell_qpn = swab32(qp->mqp.qpn << 8);
832
833 qp->mqp.event = mlx4_ib_qp_event;
834 if (!*caller_qp)
835 *caller_qp = qp;
836 return 0;
837
838 err_qpn:
839 if (!sqpn) {
840 if (qp->flags & MLX4_IB_QP_NETIF)
841 mlx4_ib_steer_qp_free(dev, qpn, 1);
842 else
843 mlx4_qp_release_range(dev->dev, qpn, 1);
844 }
845 err_proxy:
846 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI)
847 free_proxy_bufs(pd->device, qp);
848 err_wrid:
849 if (pd->uobject) {
850 if (qp_has_rq(init_attr))
851 mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db);
852 } else {
853 kfree(qp->sq.wrid);
854 kfree(qp->rq.wrid);
855 }
856
857 err_mtt:
858 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
859
860 err_buf:
861 if (pd->uobject)
862 ib_umem_release(qp->umem);
863 else
864 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
865
866 err_db:
867 if (!pd->uobject && qp_has_rq(init_attr))
868 mlx4_db_free(dev->dev, &qp->db);
869
870 err:
871 if (!*caller_qp)
872 kfree(qp);
873 return err;
874 }
875
876 static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state)
877 {
878 switch (state) {
879 case IB_QPS_RESET: return MLX4_QP_STATE_RST;
880 case IB_QPS_INIT: return MLX4_QP_STATE_INIT;
881 case IB_QPS_RTR: return MLX4_QP_STATE_RTR;
882 case IB_QPS_RTS: return MLX4_QP_STATE_RTS;
883 case IB_QPS_SQD: return MLX4_QP_STATE_SQD;
884 case IB_QPS_SQE: return MLX4_QP_STATE_SQER;
885 case IB_QPS_ERR: return MLX4_QP_STATE_ERR;
886 default: return -1;
887 }
888 }
889
890 static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
891 __acquires(&send_cq->lock) __acquires(&recv_cq->lock)
892 {
893 if (send_cq == recv_cq) {
894 spin_lock_irq(&send_cq->lock);
895 __acquire(&recv_cq->lock);
896 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
897 spin_lock_irq(&send_cq->lock);
898 spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING);
899 } else {
900 spin_lock_irq(&recv_cq->lock);
901 spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING);
902 }
903 }
904
905 static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
906 __releases(&send_cq->lock) __releases(&recv_cq->lock)
907 {
908 if (send_cq == recv_cq) {
909 __release(&recv_cq->lock);
910 spin_unlock_irq(&send_cq->lock);
911 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
912 spin_unlock(&recv_cq->lock);
913 spin_unlock_irq(&send_cq->lock);
914 } else {
915 spin_unlock(&send_cq->lock);
916 spin_unlock_irq(&recv_cq->lock);
917 }
918 }
919
920 static void del_gid_entries(struct mlx4_ib_qp *qp)
921 {
922 struct mlx4_ib_gid_entry *ge, *tmp;
923
924 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
925 list_del(&ge->list);
926 kfree(ge);
927 }
928 }
929
930 static struct mlx4_ib_pd *get_pd(struct mlx4_ib_qp *qp)
931 {
932 if (qp->ibqp.qp_type == IB_QPT_XRC_TGT)
933 return to_mpd(to_mxrcd(qp->ibqp.xrcd)->pd);
934 else
935 return to_mpd(qp->ibqp.pd);
936 }
937
938 static void get_cqs(struct mlx4_ib_qp *qp,
939 struct mlx4_ib_cq **send_cq, struct mlx4_ib_cq **recv_cq)
940 {
941 switch (qp->ibqp.qp_type) {
942 case IB_QPT_XRC_TGT:
943 *send_cq = to_mcq(to_mxrcd(qp->ibqp.xrcd)->cq);
944 *recv_cq = *send_cq;
945 break;
946 case IB_QPT_XRC_INI:
947 *send_cq = to_mcq(qp->ibqp.send_cq);
948 *recv_cq = *send_cq;
949 break;
950 default:
951 *send_cq = to_mcq(qp->ibqp.send_cq);
952 *recv_cq = to_mcq(qp->ibqp.recv_cq);
953 break;
954 }
955 }
956
957 static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
958 int is_user)
959 {
960 struct mlx4_ib_cq *send_cq, *recv_cq;
961
962 if (qp->state != IB_QPS_RESET) {
963 if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state),
964 MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp))
965 pr_warn("modify QP %06x to RESET failed.\n",
966 qp->mqp.qpn);
967 if (qp->pri.smac) {
968 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
969 qp->pri.smac = 0;
970 }
971 if (qp->alt.smac) {
972 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
973 qp->alt.smac = 0;
974 }
975 if (qp->pri.vid < 0x1000) {
976 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid);
977 qp->pri.vid = 0xFFFF;
978 qp->pri.candidate_vid = 0xFFFF;
979 qp->pri.update_vid = 0;
980 }
981 if (qp->alt.vid < 0x1000) {
982 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid);
983 qp->alt.vid = 0xFFFF;
984 qp->alt.candidate_vid = 0xFFFF;
985 qp->alt.update_vid = 0;
986 }
987 }
988
989 get_cqs(qp, &send_cq, &recv_cq);
990
991 mlx4_ib_lock_cqs(send_cq, recv_cq);
992
993 if (!is_user) {
994 __mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
995 qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL);
996 if (send_cq != recv_cq)
997 __mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
998 }
999
1000 mlx4_qp_remove(dev->dev, &qp->mqp);
1001
1002 mlx4_ib_unlock_cqs(send_cq, recv_cq);
1003
1004 mlx4_qp_free(dev->dev, &qp->mqp);
1005
1006 if (!is_sqp(dev, qp) && !is_tunnel_qp(dev, qp)) {
1007 if (qp->flags & MLX4_IB_QP_NETIF)
1008 mlx4_ib_steer_qp_free(dev, qp->mqp.qpn, 1);
1009 else
1010 mlx4_qp_release_range(dev->dev, qp->mqp.qpn, 1);
1011 }
1012
1013 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
1014
1015 if (is_user) {
1016 if (qp->rq.wqe_cnt)
1017 mlx4_ib_db_unmap_user(to_mucontext(qp->ibqp.uobject->context),
1018 &qp->db);
1019 ib_umem_release(qp->umem);
1020 } else {
1021 kfree(qp->sq.wrid);
1022 kfree(qp->rq.wrid);
1023 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
1024 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI))
1025 free_proxy_bufs(&dev->ib_dev, qp);
1026 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
1027 if (qp->rq.wqe_cnt)
1028 mlx4_db_free(dev->dev, &qp->db);
1029 }
1030
1031 del_gid_entries(qp);
1032 }
1033
1034 static u32 get_sqp_num(struct mlx4_ib_dev *dev, struct ib_qp_init_attr *attr)
1035 {
1036 /* Native or PPF */
1037 if (!mlx4_is_mfunc(dev->dev) ||
1038 (mlx4_is_master(dev->dev) &&
1039 attr->create_flags & MLX4_IB_SRIOV_SQP)) {
1040 return dev->dev->phys_caps.base_sqpn +
1041 (attr->qp_type == IB_QPT_SMI ? 0 : 2) +
1042 attr->port_num - 1;
1043 }
1044 /* PF or VF -- creating proxies */
1045 if (attr->qp_type == IB_QPT_SMI)
1046 return dev->dev->caps.qp0_proxy[attr->port_num - 1];
1047 else
1048 return dev->dev->caps.qp1_proxy[attr->port_num - 1];
1049 }
1050
1051 struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd,
1052 struct ib_qp_init_attr *init_attr,
1053 struct ib_udata *udata)
1054 {
1055 struct mlx4_ib_qp *qp = NULL;
1056 int err;
1057 u16 xrcdn = 0;
1058 gfp_t gfp;
1059
1060 gfp = (init_attr->create_flags & MLX4_IB_QP_CREATE_USE_GFP_NOIO) ?
1061 GFP_NOIO : GFP_KERNEL;
1062 /*
1063 * We only support LSO, vendor flag1, and multicast loopback blocking,
1064 * and only for kernel UD QPs.
1065 */
1066 if (init_attr->create_flags & ~(MLX4_IB_QP_LSO |
1067 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK |
1068 MLX4_IB_SRIOV_TUNNEL_QP |
1069 MLX4_IB_SRIOV_SQP |
1070 MLX4_IB_QP_NETIF |
1071 MLX4_IB_QP_CREATE_USE_GFP_NOIO))
1072 return ERR_PTR(-EINVAL);
1073
1074 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) {
1075 if (init_attr->qp_type != IB_QPT_UD)
1076 return ERR_PTR(-EINVAL);
1077 }
1078
1079 if (init_attr->create_flags &&
1080 (udata ||
1081 ((init_attr->create_flags & ~(MLX4_IB_SRIOV_SQP | MLX4_IB_QP_CREATE_USE_GFP_NOIO)) &&
1082 init_attr->qp_type != IB_QPT_UD) ||
1083 ((init_attr->create_flags & MLX4_IB_SRIOV_SQP) &&
1084 init_attr->qp_type > IB_QPT_GSI)))
1085 return ERR_PTR(-EINVAL);
1086
1087 switch (init_attr->qp_type) {
1088 case IB_QPT_XRC_TGT:
1089 pd = to_mxrcd(init_attr->xrcd)->pd;
1090 xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn;
1091 init_attr->send_cq = to_mxrcd(init_attr->xrcd)->cq;
1092 /* fall through */
1093 case IB_QPT_XRC_INI:
1094 if (!(to_mdev(pd->device)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC))
1095 return ERR_PTR(-ENOSYS);
1096 init_attr->recv_cq = init_attr->send_cq;
1097 /* fall through */
1098 case IB_QPT_RC:
1099 case IB_QPT_UC:
1100 case IB_QPT_RAW_PACKET:
1101 qp = kzalloc(sizeof *qp, gfp);
1102 if (!qp)
1103 return ERR_PTR(-ENOMEM);
1104 qp->pri.vid = 0xFFFF;
1105 qp->alt.vid = 0xFFFF;
1106 /* fall through */
1107 case IB_QPT_UD:
1108 {
1109 err = create_qp_common(to_mdev(pd->device), pd, init_attr,
1110 udata, 0, &qp, gfp);
1111 if (err)
1112 return ERR_PTR(err);
1113
1114 qp->ibqp.qp_num = qp->mqp.qpn;
1115 qp->xrcdn = xrcdn;
1116
1117 break;
1118 }
1119 case IB_QPT_SMI:
1120 case IB_QPT_GSI:
1121 {
1122 /* Userspace is not allowed to create special QPs: */
1123 if (udata)
1124 return ERR_PTR(-EINVAL);
1125
1126 err = create_qp_common(to_mdev(pd->device), pd, init_attr, udata,
1127 get_sqp_num(to_mdev(pd->device), init_attr),
1128 &qp, gfp);
1129 if (err)
1130 return ERR_PTR(err);
1131
1132 qp->port = init_attr->port_num;
1133 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
1134
1135 break;
1136 }
1137 default:
1138 /* Don't support raw QPs */
1139 return ERR_PTR(-EINVAL);
1140 }
1141
1142 return &qp->ibqp;
1143 }
1144
1145 int mlx4_ib_destroy_qp(struct ib_qp *qp)
1146 {
1147 struct mlx4_ib_dev *dev = to_mdev(qp->device);
1148 struct mlx4_ib_qp *mqp = to_mqp(qp);
1149 struct mlx4_ib_pd *pd;
1150
1151 if (is_qp0(dev, mqp))
1152 mlx4_CLOSE_PORT(dev->dev, mqp->port);
1153
1154 if (dev->qp1_proxy[mqp->port - 1] == mqp) {
1155 mutex_lock(&dev->qp1_proxy_lock[mqp->port - 1]);
1156 dev->qp1_proxy[mqp->port - 1] = NULL;
1157 mutex_unlock(&dev->qp1_proxy_lock[mqp->port - 1]);
1158 }
1159
1160 pd = get_pd(mqp);
1161 destroy_qp_common(dev, mqp, !!pd->ibpd.uobject);
1162
1163 if (is_sqp(dev, mqp))
1164 kfree(to_msqp(mqp));
1165 else
1166 kfree(mqp);
1167
1168 return 0;
1169 }
1170
1171 static int to_mlx4_st(struct mlx4_ib_dev *dev, enum mlx4_ib_qp_type type)
1172 {
1173 switch (type) {
1174 case MLX4_IB_QPT_RC: return MLX4_QP_ST_RC;
1175 case MLX4_IB_QPT_UC: return MLX4_QP_ST_UC;
1176 case MLX4_IB_QPT_UD: return MLX4_QP_ST_UD;
1177 case MLX4_IB_QPT_XRC_INI:
1178 case MLX4_IB_QPT_XRC_TGT: return MLX4_QP_ST_XRC;
1179 case MLX4_IB_QPT_SMI:
1180 case MLX4_IB_QPT_GSI:
1181 case MLX4_IB_QPT_RAW_PACKET: return MLX4_QP_ST_MLX;
1182
1183 case MLX4_IB_QPT_PROXY_SMI_OWNER:
1184 case MLX4_IB_QPT_TUN_SMI_OWNER: return (mlx4_is_mfunc(dev->dev) ?
1185 MLX4_QP_ST_MLX : -1);
1186 case MLX4_IB_QPT_PROXY_SMI:
1187 case MLX4_IB_QPT_TUN_SMI:
1188 case MLX4_IB_QPT_PROXY_GSI:
1189 case MLX4_IB_QPT_TUN_GSI: return (mlx4_is_mfunc(dev->dev) ?
1190 MLX4_QP_ST_UD : -1);
1191 default: return -1;
1192 }
1193 }
1194
1195 static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, const struct ib_qp_attr *attr,
1196 int attr_mask)
1197 {
1198 u8 dest_rd_atomic;
1199 u32 access_flags;
1200 u32 hw_access_flags = 0;
1201
1202 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1203 dest_rd_atomic = attr->max_dest_rd_atomic;
1204 else
1205 dest_rd_atomic = qp->resp_depth;
1206
1207 if (attr_mask & IB_QP_ACCESS_FLAGS)
1208 access_flags = attr->qp_access_flags;
1209 else
1210 access_flags = qp->atomic_rd_en;
1211
1212 if (!dest_rd_atomic)
1213 access_flags &= IB_ACCESS_REMOTE_WRITE;
1214
1215 if (access_flags & IB_ACCESS_REMOTE_READ)
1216 hw_access_flags |= MLX4_QP_BIT_RRE;
1217 if (access_flags & IB_ACCESS_REMOTE_ATOMIC)
1218 hw_access_flags |= MLX4_QP_BIT_RAE;
1219 if (access_flags & IB_ACCESS_REMOTE_WRITE)
1220 hw_access_flags |= MLX4_QP_BIT_RWE;
1221
1222 return cpu_to_be32(hw_access_flags);
1223 }
1224
1225 static void store_sqp_attrs(struct mlx4_ib_sqp *sqp, const struct ib_qp_attr *attr,
1226 int attr_mask)
1227 {
1228 if (attr_mask & IB_QP_PKEY_INDEX)
1229 sqp->pkey_index = attr->pkey_index;
1230 if (attr_mask & IB_QP_QKEY)
1231 sqp->qkey = attr->qkey;
1232 if (attr_mask & IB_QP_SQ_PSN)
1233 sqp->send_psn = attr->sq_psn;
1234 }
1235
1236 static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port)
1237 {
1238 path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6);
1239 }
1240
1241 static int _mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah,
1242 u64 smac, u16 vlan_tag, struct mlx4_qp_path *path,
1243 struct mlx4_roce_smac_vlan_info *smac_info, u8 port)
1244 {
1245 int is_eth = rdma_port_get_link_layer(&dev->ib_dev, port) ==
1246 IB_LINK_LAYER_ETHERNET;
1247 int vidx;
1248 int smac_index;
1249 int err;
1250
1251
1252 path->grh_mylmc = ah->src_path_bits & 0x7f;
1253 path->rlid = cpu_to_be16(ah->dlid);
1254 if (ah->static_rate) {
1255 path->static_rate = ah->static_rate + MLX4_STAT_RATE_OFFSET;
1256 while (path->static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
1257 !(1 << path->static_rate & dev->dev->caps.stat_rate_support))
1258 --path->static_rate;
1259 } else
1260 path->static_rate = 0;
1261
1262 if (ah->ah_flags & IB_AH_GRH) {
1263 if (ah->grh.sgid_index >= dev->dev->caps.gid_table_len[port]) {
1264 pr_err("sgid_index (%u) too large. max is %d\n",
1265 ah->grh.sgid_index, dev->dev->caps.gid_table_len[port] - 1);
1266 return -1;
1267 }
1268
1269 path->grh_mylmc |= 1 << 7;
1270 path->mgid_index = ah->grh.sgid_index;
1271 path->hop_limit = ah->grh.hop_limit;
1272 path->tclass_flowlabel =
1273 cpu_to_be32((ah->grh.traffic_class << 20) |
1274 (ah->grh.flow_label));
1275 memcpy(path->rgid, ah->grh.dgid.raw, 16);
1276 }
1277
1278 if (is_eth) {
1279 if (!(ah->ah_flags & IB_AH_GRH))
1280 return -1;
1281
1282 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
1283 ((port - 1) << 6) | ((ah->sl & 7) << 3);
1284
1285 path->feup |= MLX4_FEUP_FORCE_ETH_UP;
1286 if (vlan_tag < 0x1000) {
1287 if (smac_info->vid < 0x1000) {
1288 /* both valid vlan ids */
1289 if (smac_info->vid != vlan_tag) {
1290 /* different VIDs. unreg old and reg new */
1291 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx);
1292 if (err)
1293 return err;
1294 smac_info->candidate_vid = vlan_tag;
1295 smac_info->candidate_vlan_index = vidx;
1296 smac_info->candidate_vlan_port = port;
1297 smac_info->update_vid = 1;
1298 path->vlan_index = vidx;
1299 } else {
1300 path->vlan_index = smac_info->vlan_index;
1301 }
1302 } else {
1303 /* no current vlan tag in qp */
1304 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx);
1305 if (err)
1306 return err;
1307 smac_info->candidate_vid = vlan_tag;
1308 smac_info->candidate_vlan_index = vidx;
1309 smac_info->candidate_vlan_port = port;
1310 smac_info->update_vid = 1;
1311 path->vlan_index = vidx;
1312 }
1313 path->feup |= MLX4_FVL_FORCE_ETH_VLAN;
1314 path->fl = 1 << 6;
1315 } else {
1316 /* have current vlan tag. unregister it at modify-qp success */
1317 if (smac_info->vid < 0x1000) {
1318 smac_info->candidate_vid = 0xFFFF;
1319 smac_info->update_vid = 1;
1320 }
1321 }
1322
1323 /* get smac_index for RoCE use.
1324 * If no smac was yet assigned, register one.
1325 * If one was already assigned, but the new mac differs,
1326 * unregister the old one and register the new one.
1327 */
1328 if (!smac_info->smac || smac_info->smac != smac) {
1329 /* register candidate now, unreg if needed, after success */
1330 smac_index = mlx4_register_mac(dev->dev, port, smac);
1331 if (smac_index >= 0) {
1332 smac_info->candidate_smac_index = smac_index;
1333 smac_info->candidate_smac = smac;
1334 smac_info->candidate_smac_port = port;
1335 } else {
1336 return -EINVAL;
1337 }
1338 } else {
1339 smac_index = smac_info->smac_index;
1340 }
1341
1342 memcpy(path->dmac, ah->dmac, 6);
1343 path->ackto = MLX4_IB_LINK_TYPE_ETH;
1344 /* put MAC table smac index for IBoE */
1345 path->grh_mylmc = (u8) (smac_index) | 0x80;
1346 } else {
1347 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
1348 ((port - 1) << 6) | ((ah->sl & 0xf) << 2);
1349 }
1350
1351 return 0;
1352 }
1353
1354 static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_qp_attr *qp,
1355 enum ib_qp_attr_mask qp_attr_mask,
1356 struct mlx4_ib_qp *mqp,
1357 struct mlx4_qp_path *path, u8 port)
1358 {
1359 return _mlx4_set_path(dev, &qp->ah_attr,
1360 mlx4_mac_to_u64((u8 *)qp->smac),
1361 (qp_attr_mask & IB_QP_VID) ? qp->vlan_id : 0xffff,
1362 path, &mqp->pri, port);
1363 }
1364
1365 static int mlx4_set_alt_path(struct mlx4_ib_dev *dev,
1366 const struct ib_qp_attr *qp,
1367 enum ib_qp_attr_mask qp_attr_mask,
1368 struct mlx4_ib_qp *mqp,
1369 struct mlx4_qp_path *path, u8 port)
1370 {
1371 return _mlx4_set_path(dev, &qp->alt_ah_attr,
1372 mlx4_mac_to_u64((u8 *)qp->alt_smac),
1373 (qp_attr_mask & IB_QP_ALT_VID) ?
1374 qp->alt_vlan_id : 0xffff,
1375 path, &mqp->alt, port);
1376 }
1377
1378 static void update_mcg_macs(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
1379 {
1380 struct mlx4_ib_gid_entry *ge, *tmp;
1381
1382 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
1383 if (!ge->added && mlx4_ib_add_mc(dev, qp, &ge->gid)) {
1384 ge->added = 1;
1385 ge->port = qp->port;
1386 }
1387 }
1388 }
1389
1390 static int handle_eth_ud_smac_index(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp, u8 *smac,
1391 struct mlx4_qp_context *context)
1392 {
1393 u64 u64_mac;
1394 int smac_index;
1395
1396 u64_mac = atomic64_read(&dev->iboe.mac[qp->port - 1]);
1397
1398 context->pri_path.sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | ((qp->port - 1) << 6);
1399 if (!qp->pri.smac) {
1400 smac_index = mlx4_register_mac(dev->dev, qp->port, u64_mac);
1401 if (smac_index >= 0) {
1402 qp->pri.candidate_smac_index = smac_index;
1403 qp->pri.candidate_smac = u64_mac;
1404 qp->pri.candidate_smac_port = qp->port;
1405 context->pri_path.grh_mylmc = 0x80 | (u8) smac_index;
1406 } else {
1407 return -ENOENT;
1408 }
1409 }
1410 return 0;
1411 }
1412
1413 static int __mlx4_ib_modify_qp(struct ib_qp *ibqp,
1414 const struct ib_qp_attr *attr, int attr_mask,
1415 enum ib_qp_state cur_state, enum ib_qp_state new_state)
1416 {
1417 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
1418 struct mlx4_ib_qp *qp = to_mqp(ibqp);
1419 struct mlx4_ib_pd *pd;
1420 struct mlx4_ib_cq *send_cq, *recv_cq;
1421 struct mlx4_qp_context *context;
1422 enum mlx4_qp_optpar optpar = 0;
1423 int sqd_event;
1424 int steer_qp = 0;
1425 int err = -EINVAL;
1426
1427 context = kzalloc(sizeof *context, GFP_KERNEL);
1428 if (!context)
1429 return -ENOMEM;
1430
1431 context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) |
1432 (to_mlx4_st(dev, qp->mlx4_ib_qp_type) << 16));
1433
1434 if (!(attr_mask & IB_QP_PATH_MIG_STATE))
1435 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
1436 else {
1437 optpar |= MLX4_QP_OPTPAR_PM_STATE;
1438 switch (attr->path_mig_state) {
1439 case IB_MIG_MIGRATED:
1440 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
1441 break;
1442 case IB_MIG_REARM:
1443 context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11);
1444 break;
1445 case IB_MIG_ARMED:
1446 context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11);
1447 break;
1448 }
1449 }
1450
1451 if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI)
1452 context->mtu_msgmax = (IB_MTU_4096 << 5) | 11;
1453 else if (ibqp->qp_type == IB_QPT_RAW_PACKET)
1454 context->mtu_msgmax = (MLX4_RAW_QP_MTU << 5) | MLX4_RAW_QP_MSGMAX;
1455 else if (ibqp->qp_type == IB_QPT_UD) {
1456 if (qp->flags & MLX4_IB_QP_LSO)
1457 context->mtu_msgmax = (IB_MTU_4096 << 5) |
1458 ilog2(dev->dev->caps.max_gso_sz);
1459 else
1460 context->mtu_msgmax = (IB_MTU_4096 << 5) | 12;
1461 } else if (attr_mask & IB_QP_PATH_MTU) {
1462 if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) {
1463 pr_err("path MTU (%u) is invalid\n",
1464 attr->path_mtu);
1465 goto out;
1466 }
1467 context->mtu_msgmax = (attr->path_mtu << 5) |
1468 ilog2(dev->dev->caps.max_msg_sz);
1469 }
1470
1471 if (qp->rq.wqe_cnt)
1472 context->rq_size_stride = ilog2(qp->rq.wqe_cnt) << 3;
1473 context->rq_size_stride |= qp->rq.wqe_shift - 4;
1474
1475 if (qp->sq.wqe_cnt)
1476 context->sq_size_stride = ilog2(qp->sq.wqe_cnt) << 3;
1477 context->sq_size_stride |= qp->sq.wqe_shift - 4;
1478
1479 if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
1480 context->sq_size_stride |= !!qp->sq_no_prefetch << 7;
1481 context->xrcd = cpu_to_be32((u32) qp->xrcdn);
1482 if (ibqp->qp_type == IB_QPT_RAW_PACKET)
1483 context->param3 |= cpu_to_be32(1 << 30);
1484 }
1485
1486 if (qp->ibqp.uobject)
1487 context->usr_page = cpu_to_be32(to_mucontext(ibqp->uobject->context)->uar.index);
1488 else
1489 context->usr_page = cpu_to_be32(dev->priv_uar.index);
1490
1491 if (attr_mask & IB_QP_DEST_QPN)
1492 context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
1493
1494 if (attr_mask & IB_QP_PORT) {
1495 if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD &&
1496 !(attr_mask & IB_QP_AV)) {
1497 mlx4_set_sched(&context->pri_path, attr->port_num);
1498 optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE;
1499 }
1500 }
1501
1502 if (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) {
1503 if (dev->counters[qp->port - 1] != -1) {
1504 context->pri_path.counter_index =
1505 dev->counters[qp->port - 1];
1506 optpar |= MLX4_QP_OPTPAR_COUNTER_INDEX;
1507 } else
1508 context->pri_path.counter_index = 0xff;
1509
1510 if (qp->flags & MLX4_IB_QP_NETIF) {
1511 mlx4_ib_steer_qp_reg(dev, qp, 1);
1512 steer_qp = 1;
1513 }
1514 }
1515
1516 if (attr_mask & IB_QP_PKEY_INDEX) {
1517 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1518 context->pri_path.disable_pkey_check = 0x40;
1519 context->pri_path.pkey_index = attr->pkey_index;
1520 optpar |= MLX4_QP_OPTPAR_PKEY_INDEX;
1521 }
1522
1523 if (attr_mask & IB_QP_AV) {
1524 if (mlx4_set_path(dev, attr, attr_mask, qp, &context->pri_path,
1525 attr_mask & IB_QP_PORT ?
1526 attr->port_num : qp->port))
1527 goto out;
1528
1529 optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH |
1530 MLX4_QP_OPTPAR_SCHED_QUEUE);
1531 }
1532
1533 if (attr_mask & IB_QP_TIMEOUT) {
1534 context->pri_path.ackto |= attr->timeout << 3;
1535 optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT;
1536 }
1537
1538 if (attr_mask & IB_QP_ALT_PATH) {
1539 if (attr->alt_port_num == 0 ||
1540 attr->alt_port_num > dev->dev->caps.num_ports)
1541 goto out;
1542
1543 if (attr->alt_pkey_index >=
1544 dev->dev->caps.pkey_table_len[attr->alt_port_num])
1545 goto out;
1546
1547 if (mlx4_set_alt_path(dev, attr, attr_mask, qp,
1548 &context->alt_path,
1549 attr->alt_port_num))
1550 goto out;
1551
1552 context->alt_path.pkey_index = attr->alt_pkey_index;
1553 context->alt_path.ackto = attr->alt_timeout << 3;
1554 optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH;
1555 }
1556
1557 pd = get_pd(qp);
1558 get_cqs(qp, &send_cq, &recv_cq);
1559 context->pd = cpu_to_be32(pd->pdn);
1560 context->cqn_send = cpu_to_be32(send_cq->mcq.cqn);
1561 context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn);
1562 context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28);
1563
1564 /* Set "fast registration enabled" for all kernel QPs */
1565 if (!qp->ibqp.uobject)
1566 context->params1 |= cpu_to_be32(1 << 11);
1567
1568 if (attr_mask & IB_QP_RNR_RETRY) {
1569 context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
1570 optpar |= MLX4_QP_OPTPAR_RNR_RETRY;
1571 }
1572
1573 if (attr_mask & IB_QP_RETRY_CNT) {
1574 context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
1575 optpar |= MLX4_QP_OPTPAR_RETRY_COUNT;
1576 }
1577
1578 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1579 if (attr->max_rd_atomic)
1580 context->params1 |=
1581 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
1582 optpar |= MLX4_QP_OPTPAR_SRA_MAX;
1583 }
1584
1585 if (attr_mask & IB_QP_SQ_PSN)
1586 context->next_send_psn = cpu_to_be32(attr->sq_psn);
1587
1588 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1589 if (attr->max_dest_rd_atomic)
1590 context->params2 |=
1591 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
1592 optpar |= MLX4_QP_OPTPAR_RRA_MAX;
1593 }
1594
1595 if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) {
1596 context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask);
1597 optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE;
1598 }
1599
1600 if (ibqp->srq)
1601 context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC);
1602
1603 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
1604 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
1605 optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT;
1606 }
1607 if (attr_mask & IB_QP_RQ_PSN)
1608 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
1609
1610 /* proxy and tunnel qp qkeys will be changed in modify-qp wrappers */
1611 if (attr_mask & IB_QP_QKEY) {
1612 if (qp->mlx4_ib_qp_type &
1613 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))
1614 context->qkey = cpu_to_be32(IB_QP_SET_QKEY);
1615 else {
1616 if (mlx4_is_mfunc(dev->dev) &&
1617 !(qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) &&
1618 (attr->qkey & MLX4_RESERVED_QKEY_MASK) ==
1619 MLX4_RESERVED_QKEY_BASE) {
1620 pr_err("Cannot use reserved QKEY"
1621 " 0x%x (range 0xffff0000..0xffffffff"
1622 " is reserved)\n", attr->qkey);
1623 err = -EINVAL;
1624 goto out;
1625 }
1626 context->qkey = cpu_to_be32(attr->qkey);
1627 }
1628 optpar |= MLX4_QP_OPTPAR_Q_KEY;
1629 }
1630
1631 if (ibqp->srq)
1632 context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn);
1633
1634 if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1635 context->db_rec_addr = cpu_to_be64(qp->db.dma);
1636
1637 if (cur_state == IB_QPS_INIT &&
1638 new_state == IB_QPS_RTR &&
1639 (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
1640 ibqp->qp_type == IB_QPT_UD ||
1641 ibqp->qp_type == IB_QPT_RAW_PACKET)) {
1642 context->pri_path.sched_queue = (qp->port - 1) << 6;
1643 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
1644 qp->mlx4_ib_qp_type &
1645 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) {
1646 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE;
1647 if (qp->mlx4_ib_qp_type != MLX4_IB_QPT_SMI)
1648 context->pri_path.fl = 0x80;
1649 } else {
1650 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1651 context->pri_path.fl = 0x80;
1652 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE;
1653 }
1654 if (rdma_port_get_link_layer(&dev->ib_dev, qp->port) ==
1655 IB_LINK_LAYER_ETHERNET) {
1656 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI ||
1657 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI)
1658 context->pri_path.feup = 1 << 7; /* don't fsm */
1659 /* handle smac_index */
1660 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_UD ||
1661 qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI ||
1662 qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI) {
1663 err = handle_eth_ud_smac_index(dev, qp, (u8 *)attr->smac, context);
1664 if (err)
1665 return -EINVAL;
1666 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI)
1667 dev->qp1_proxy[qp->port - 1] = qp;
1668 }
1669 }
1670 }
1671
1672 if (qp->ibqp.qp_type == IB_QPT_RAW_PACKET)
1673 context->pri_path.ackto = (context->pri_path.ackto & 0xf8) |
1674 MLX4_IB_LINK_TYPE_ETH;
1675
1676 if (ibqp->qp_type == IB_QPT_UD && (new_state == IB_QPS_RTR)) {
1677 int is_eth = rdma_port_get_link_layer(
1678 &dev->ib_dev, qp->port) ==
1679 IB_LINK_LAYER_ETHERNET;
1680 if (is_eth) {
1681 context->pri_path.ackto = MLX4_IB_LINK_TYPE_ETH;
1682 optpar |= MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH;
1683 }
1684 }
1685
1686
1687 if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD &&
1688 attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
1689 sqd_event = 1;
1690 else
1691 sqd_event = 0;
1692
1693 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1694 context->rlkey |= (1 << 4);
1695
1696 /*
1697 * Before passing a kernel QP to the HW, make sure that the
1698 * ownership bits of the send queue are set and the SQ
1699 * headroom is stamped so that the hardware doesn't start
1700 * processing stale work requests.
1701 */
1702 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
1703 struct mlx4_wqe_ctrl_seg *ctrl;
1704 int i;
1705
1706 for (i = 0; i < qp->sq.wqe_cnt; ++i) {
1707 ctrl = get_send_wqe(qp, i);
1708 ctrl->owner_opcode = cpu_to_be32(1 << 31);
1709 if (qp->sq_max_wqes_per_wr == 1)
1710 ctrl->fence_size = 1 << (qp->sq.wqe_shift - 4);
1711
1712 stamp_send_wqe(qp, i, 1 << qp->sq.wqe_shift);
1713 }
1714 }
1715
1716 err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state),
1717 to_mlx4_state(new_state), context, optpar,
1718 sqd_event, &qp->mqp);
1719 if (err)
1720 goto out;
1721
1722 qp->state = new_state;
1723
1724 if (attr_mask & IB_QP_ACCESS_FLAGS)
1725 qp->atomic_rd_en = attr->qp_access_flags;
1726 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1727 qp->resp_depth = attr->max_dest_rd_atomic;
1728 if (attr_mask & IB_QP_PORT) {
1729 qp->port = attr->port_num;
1730 update_mcg_macs(dev, qp);
1731 }
1732 if (attr_mask & IB_QP_ALT_PATH)
1733 qp->alt_port = attr->alt_port_num;
1734
1735 if (is_sqp(dev, qp))
1736 store_sqp_attrs(to_msqp(qp), attr, attr_mask);
1737
1738 /*
1739 * If we moved QP0 to RTR, bring the IB link up; if we moved
1740 * QP0 to RESET or ERROR, bring the link back down.
1741 */
1742 if (is_qp0(dev, qp)) {
1743 if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR)
1744 if (mlx4_INIT_PORT(dev->dev, qp->port))
1745 pr_warn("INIT_PORT failed for port %d\n",
1746 qp->port);
1747
1748 if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR &&
1749 (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR))
1750 mlx4_CLOSE_PORT(dev->dev, qp->port);
1751 }
1752
1753 /*
1754 * If we moved a kernel QP to RESET, clean up all old CQ
1755 * entries and reinitialize the QP.
1756 */
1757 if (new_state == IB_QPS_RESET) {
1758 if (!ibqp->uobject) {
1759 mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
1760 ibqp->srq ? to_msrq(ibqp->srq) : NULL);
1761 if (send_cq != recv_cq)
1762 mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1763
1764 qp->rq.head = 0;
1765 qp->rq.tail = 0;
1766 qp->sq.head = 0;
1767 qp->sq.tail = 0;
1768 qp->sq_next_wqe = 0;
1769 if (qp->rq.wqe_cnt)
1770 *qp->db.db = 0;
1771
1772 if (qp->flags & MLX4_IB_QP_NETIF)
1773 mlx4_ib_steer_qp_reg(dev, qp, 0);
1774 }
1775 if (qp->pri.smac) {
1776 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
1777 qp->pri.smac = 0;
1778 }
1779 if (qp->alt.smac) {
1780 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
1781 qp->alt.smac = 0;
1782 }
1783 if (qp->pri.vid < 0x1000) {
1784 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid);
1785 qp->pri.vid = 0xFFFF;
1786 qp->pri.candidate_vid = 0xFFFF;
1787 qp->pri.update_vid = 0;
1788 }
1789
1790 if (qp->alt.vid < 0x1000) {
1791 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid);
1792 qp->alt.vid = 0xFFFF;
1793 qp->alt.candidate_vid = 0xFFFF;
1794 qp->alt.update_vid = 0;
1795 }
1796 }
1797 out:
1798 if (err && steer_qp)
1799 mlx4_ib_steer_qp_reg(dev, qp, 0);
1800 kfree(context);
1801 if (qp->pri.candidate_smac) {
1802 if (err) {
1803 mlx4_unregister_mac(dev->dev, qp->pri.candidate_smac_port, qp->pri.candidate_smac);
1804 } else {
1805 if (qp->pri.smac)
1806 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
1807 qp->pri.smac = qp->pri.candidate_smac;
1808 qp->pri.smac_index = qp->pri.candidate_smac_index;
1809 qp->pri.smac_port = qp->pri.candidate_smac_port;
1810 }
1811 qp->pri.candidate_smac = 0;
1812 qp->pri.candidate_smac_index = 0;
1813 qp->pri.candidate_smac_port = 0;
1814 }
1815 if (qp->alt.candidate_smac) {
1816 if (err) {
1817 mlx4_unregister_mac(dev->dev, qp->alt.candidate_smac_port, qp->alt.candidate_smac);
1818 } else {
1819 if (qp->alt.smac)
1820 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
1821 qp->alt.smac = qp->alt.candidate_smac;
1822 qp->alt.smac_index = qp->alt.candidate_smac_index;
1823 qp->alt.smac_port = qp->alt.candidate_smac_port;
1824 }
1825 qp->alt.candidate_smac = 0;
1826 qp->alt.candidate_smac_index = 0;
1827 qp->alt.candidate_smac_port = 0;
1828 }
1829
1830 if (qp->pri.update_vid) {
1831 if (err) {
1832 if (qp->pri.candidate_vid < 0x1000)
1833 mlx4_unregister_vlan(dev->dev, qp->pri.candidate_vlan_port,
1834 qp->pri.candidate_vid);
1835 } else {
1836 if (qp->pri.vid < 0x1000)
1837 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port,
1838 qp->pri.vid);
1839 qp->pri.vid = qp->pri.candidate_vid;
1840 qp->pri.vlan_port = qp->pri.candidate_vlan_port;
1841 qp->pri.vlan_index = qp->pri.candidate_vlan_index;
1842 }
1843 qp->pri.candidate_vid = 0xFFFF;
1844 qp->pri.update_vid = 0;
1845 }
1846
1847 if (qp->alt.update_vid) {
1848 if (err) {
1849 if (qp->alt.candidate_vid < 0x1000)
1850 mlx4_unregister_vlan(dev->dev, qp->alt.candidate_vlan_port,
1851 qp->alt.candidate_vid);
1852 } else {
1853 if (qp->alt.vid < 0x1000)
1854 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port,
1855 qp->alt.vid);
1856 qp->alt.vid = qp->alt.candidate_vid;
1857 qp->alt.vlan_port = qp->alt.candidate_vlan_port;
1858 qp->alt.vlan_index = qp->alt.candidate_vlan_index;
1859 }
1860 qp->alt.candidate_vid = 0xFFFF;
1861 qp->alt.update_vid = 0;
1862 }
1863
1864 return err;
1865 }
1866
1867 int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1868 int attr_mask, struct ib_udata *udata)
1869 {
1870 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
1871 struct mlx4_ib_qp *qp = to_mqp(ibqp);
1872 enum ib_qp_state cur_state, new_state;
1873 int err = -EINVAL;
1874 int ll;
1875 mutex_lock(&qp->mutex);
1876
1877 cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
1878 new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
1879
1880 if (cur_state == new_state && cur_state == IB_QPS_RESET) {
1881 ll = IB_LINK_LAYER_UNSPECIFIED;
1882 } else {
1883 int port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1884 ll = rdma_port_get_link_layer(&dev->ib_dev, port);
1885 }
1886
1887 if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
1888 attr_mask, ll)) {
1889 pr_debug("qpn 0x%x: invalid attribute mask specified "
1890 "for transition %d to %d. qp_type %d,"
1891 " attr_mask 0x%x\n",
1892 ibqp->qp_num, cur_state, new_state,
1893 ibqp->qp_type, attr_mask);
1894 goto out;
1895 }
1896
1897 if ((attr_mask & IB_QP_PORT) &&
1898 (attr->port_num == 0 || attr->port_num > dev->num_ports)) {
1899 pr_debug("qpn 0x%x: invalid port number (%d) specified "
1900 "for transition %d to %d. qp_type %d\n",
1901 ibqp->qp_num, attr->port_num, cur_state,
1902 new_state, ibqp->qp_type);
1903 goto out;
1904 }
1905
1906 if ((attr_mask & IB_QP_PORT) && (ibqp->qp_type == IB_QPT_RAW_PACKET) &&
1907 (rdma_port_get_link_layer(&dev->ib_dev, attr->port_num) !=
1908 IB_LINK_LAYER_ETHERNET))
1909 goto out;
1910
1911 if (attr_mask & IB_QP_PKEY_INDEX) {
1912 int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1913 if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) {
1914 pr_debug("qpn 0x%x: invalid pkey index (%d) specified "
1915 "for transition %d to %d. qp_type %d\n",
1916 ibqp->qp_num, attr->pkey_index, cur_state,
1917 new_state, ibqp->qp_type);
1918 goto out;
1919 }
1920 }
1921
1922 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
1923 attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) {
1924 pr_debug("qpn 0x%x: max_rd_atomic (%d) too large. "
1925 "Transition %d to %d. qp_type %d\n",
1926 ibqp->qp_num, attr->max_rd_atomic, cur_state,
1927 new_state, ibqp->qp_type);
1928 goto out;
1929 }
1930
1931 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
1932 attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) {
1933 pr_debug("qpn 0x%x: max_dest_rd_atomic (%d) too large. "
1934 "Transition %d to %d. qp_type %d\n",
1935 ibqp->qp_num, attr->max_dest_rd_atomic, cur_state,
1936 new_state, ibqp->qp_type);
1937 goto out;
1938 }
1939
1940 if (cur_state == new_state && cur_state == IB_QPS_RESET) {
1941 err = 0;
1942 goto out;
1943 }
1944
1945 err = __mlx4_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state);
1946
1947 out:
1948 mutex_unlock(&qp->mutex);
1949 return err;
1950 }
1951
1952 static int vf_get_qp0_qkey(struct mlx4_dev *dev, int qpn, u32 *qkey)
1953 {
1954 int i;
1955 for (i = 0; i < dev->caps.num_ports; i++) {
1956 if (qpn == dev->caps.qp0_proxy[i] ||
1957 qpn == dev->caps.qp0_tunnel[i]) {
1958 *qkey = dev->caps.qp0_qkey[i];
1959 return 0;
1960 }
1961 }
1962 return -EINVAL;
1963 }
1964
1965 static int build_sriov_qp0_header(struct mlx4_ib_sqp *sqp,
1966 struct ib_send_wr *wr,
1967 void *wqe, unsigned *mlx_seg_len)
1968 {
1969 struct mlx4_ib_dev *mdev = to_mdev(sqp->qp.ibqp.device);
1970 struct ib_device *ib_dev = &mdev->ib_dev;
1971 struct mlx4_wqe_mlx_seg *mlx = wqe;
1972 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
1973 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
1974 u16 pkey;
1975 u32 qkey;
1976 int send_size;
1977 int header_size;
1978 int spc;
1979 int i;
1980
1981 if (wr->opcode != IB_WR_SEND)
1982 return -EINVAL;
1983
1984 send_size = 0;
1985
1986 for (i = 0; i < wr->num_sge; ++i)
1987 send_size += wr->sg_list[i].length;
1988
1989 /* for proxy-qp0 sends, need to add in size of tunnel header */
1990 /* for tunnel-qp0 sends, tunnel header is already in s/g list */
1991 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER)
1992 send_size += sizeof (struct mlx4_ib_tunnel_header);
1993
1994 ib_ud_header_init(send_size, 1, 0, 0, 0, 0, &sqp->ud_header);
1995
1996 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) {
1997 sqp->ud_header.lrh.service_level =
1998 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
1999 sqp->ud_header.lrh.destination_lid =
2000 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2001 sqp->ud_header.lrh.source_lid =
2002 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2003 }
2004
2005 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
2006
2007 /* force loopback */
2008 mlx->flags |= cpu_to_be32(MLX4_WQE_MLX_VL15 | 0x1 | MLX4_WQE_MLX_SLR);
2009 mlx->rlid = sqp->ud_header.lrh.destination_lid;
2010
2011 sqp->ud_header.lrh.virtual_lane = 0;
2012 sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
2013 ib_get_cached_pkey(ib_dev, sqp->qp.port, 0, &pkey);
2014 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
2015 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_TUN_SMI_OWNER)
2016 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2017 else
2018 sqp->ud_header.bth.destination_qpn =
2019 cpu_to_be32(mdev->dev->caps.qp0_tunnel[sqp->qp.port - 1]);
2020
2021 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
2022 if (mlx4_is_master(mdev->dev)) {
2023 if (mlx4_get_parav_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
2024 return -EINVAL;
2025 } else {
2026 if (vf_get_qp0_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
2027 return -EINVAL;
2028 }
2029 sqp->ud_header.deth.qkey = cpu_to_be32(qkey);
2030 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.mqp.qpn);
2031
2032 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
2033 sqp->ud_header.immediate_present = 0;
2034
2035 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
2036
2037 /*
2038 * Inline data segments may not cross a 64 byte boundary. If
2039 * our UD header is bigger than the space available up to the
2040 * next 64 byte boundary in the WQE, use two inline data
2041 * segments to hold the UD header.
2042 */
2043 spc = MLX4_INLINE_ALIGN -
2044 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2045 if (header_size <= spc) {
2046 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
2047 memcpy(inl + 1, sqp->header_buf, header_size);
2048 i = 1;
2049 } else {
2050 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2051 memcpy(inl + 1, sqp->header_buf, spc);
2052
2053 inl = (void *) (inl + 1) + spc;
2054 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
2055 /*
2056 * Need a barrier here to make sure all the data is
2057 * visible before the byte_count field is set.
2058 * Otherwise the HCA prefetcher could grab the 64-byte
2059 * chunk with this inline segment and get a valid (!=
2060 * 0xffffffff) byte count but stale data, and end up
2061 * generating a packet with bad headers.
2062 *
2063 * The first inline segment's byte_count field doesn't
2064 * need a barrier, because it comes after a
2065 * control/MLX segment and therefore is at an offset
2066 * of 16 mod 64.
2067 */
2068 wmb();
2069 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
2070 i = 2;
2071 }
2072
2073 *mlx_seg_len =
2074 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
2075 return 0;
2076 }
2077
2078 static void mlx4_u64_to_smac(u8 *dst_mac, u64 src_mac)
2079 {
2080 int i;
2081
2082 for (i = ETH_ALEN; i; i--) {
2083 dst_mac[i - 1] = src_mac & 0xff;
2084 src_mac >>= 8;
2085 }
2086 }
2087
2088 static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
2089 void *wqe, unsigned *mlx_seg_len)
2090 {
2091 struct ib_device *ib_dev = sqp->qp.ibqp.device;
2092 struct mlx4_wqe_mlx_seg *mlx = wqe;
2093 struct mlx4_wqe_ctrl_seg *ctrl = wqe;
2094 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
2095 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2096 union ib_gid sgid;
2097 u16 pkey;
2098 int send_size;
2099 int header_size;
2100 int spc;
2101 int i;
2102 int err = 0;
2103 u16 vlan = 0xffff;
2104 bool is_eth;
2105 bool is_vlan = false;
2106 bool is_grh;
2107
2108 send_size = 0;
2109 for (i = 0; i < wr->num_sge; ++i)
2110 send_size += wr->sg_list[i].length;
2111
2112 is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET;
2113 is_grh = mlx4_ib_ah_grh_present(ah);
2114 if (is_eth) {
2115 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2116 /* When multi-function is enabled, the ib_core gid
2117 * indexes don't necessarily match the hw ones, so
2118 * we must use our own cache */
2119 err = mlx4_get_roce_gid_from_slave(to_mdev(ib_dev)->dev,
2120 be32_to_cpu(ah->av.ib.port_pd) >> 24,
2121 ah->av.ib.gid_index, &sgid.raw[0]);
2122 if (err)
2123 return err;
2124 } else {
2125 err = ib_get_cached_gid(ib_dev,
2126 be32_to_cpu(ah->av.ib.port_pd) >> 24,
2127 ah->av.ib.gid_index, &sgid);
2128 if (err)
2129 return err;
2130 }
2131
2132 if (ah->av.eth.vlan != cpu_to_be16(0xffff)) {
2133 vlan = be16_to_cpu(ah->av.eth.vlan) & 0x0fff;
2134 is_vlan = 1;
2135 }
2136 }
2137 ib_ud_header_init(send_size, !is_eth, is_eth, is_vlan, is_grh, 0, &sqp->ud_header);
2138
2139 if (!is_eth) {
2140 sqp->ud_header.lrh.service_level =
2141 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
2142 sqp->ud_header.lrh.destination_lid = ah->av.ib.dlid;
2143 sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2144 }
2145
2146 if (is_grh) {
2147 sqp->ud_header.grh.traffic_class =
2148 (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff;
2149 sqp->ud_header.grh.flow_label =
2150 ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
2151 sqp->ud_header.grh.hop_limit = ah->av.ib.hop_limit;
2152 if (is_eth)
2153 memcpy(sqp->ud_header.grh.source_gid.raw, sgid.raw, 16);
2154 else {
2155 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2156 /* When multi-function is enabled, the ib_core gid
2157 * indexes don't necessarily match the hw ones, so
2158 * we must use our own cache */
2159 sqp->ud_header.grh.source_gid.global.subnet_prefix =
2160 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
2161 subnet_prefix;
2162 sqp->ud_header.grh.source_gid.global.interface_id =
2163 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
2164 guid_cache[ah->av.ib.gid_index];
2165 } else
2166 ib_get_cached_gid(ib_dev,
2167 be32_to_cpu(ah->av.ib.port_pd) >> 24,
2168 ah->av.ib.gid_index,
2169 &sqp->ud_header.grh.source_gid);
2170 }
2171 memcpy(sqp->ud_header.grh.destination_gid.raw,
2172 ah->av.ib.dgid, 16);
2173 }
2174
2175 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
2176
2177 if (!is_eth) {
2178 mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) |
2179 (sqp->ud_header.lrh.destination_lid ==
2180 IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) |
2181 (sqp->ud_header.lrh.service_level << 8));
2182 if (ah->av.ib.port_pd & cpu_to_be32(0x80000000))
2183 mlx->flags |= cpu_to_be32(0x1); /* force loopback */
2184 mlx->rlid = sqp->ud_header.lrh.destination_lid;
2185 }
2186
2187 switch (wr->opcode) {
2188 case IB_WR_SEND:
2189 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
2190 sqp->ud_header.immediate_present = 0;
2191 break;
2192 case IB_WR_SEND_WITH_IMM:
2193 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
2194 sqp->ud_header.immediate_present = 1;
2195 sqp->ud_header.immediate_data = wr->ex.imm_data;
2196 break;
2197 default:
2198 return -EINVAL;
2199 }
2200
2201 if (is_eth) {
2202 struct in6_addr in6;
2203
2204 u16 pcp = (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 29) << 13;
2205
2206 mlx->sched_prio = cpu_to_be16(pcp);
2207
2208 memcpy(sqp->ud_header.eth.dmac_h, ah->av.eth.mac, 6);
2209 /* FIXME: cache smac value? */
2210 memcpy(&ctrl->srcrb_flags16[0], ah->av.eth.mac, 2);
2211 memcpy(&ctrl->imm, ah->av.eth.mac + 2, 4);
2212 memcpy(&in6, sgid.raw, sizeof(in6));
2213
2214 if (!mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2215 u64 mac = atomic64_read(&to_mdev(ib_dev)->iboe.mac[sqp->qp.port - 1]);
2216 u8 smac[ETH_ALEN];
2217
2218 mlx4_u64_to_smac(smac, mac);
2219 memcpy(sqp->ud_header.eth.smac_h, smac, ETH_ALEN);
2220 } else {
2221 /* use the src mac of the tunnel */
2222 memcpy(sqp->ud_header.eth.smac_h, ah->av.eth.s_mac, ETH_ALEN);
2223 }
2224
2225 if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6))
2226 mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
2227 if (!is_vlan) {
2228 sqp->ud_header.eth.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
2229 } else {
2230 sqp->ud_header.vlan.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
2231 sqp->ud_header.vlan.tag = cpu_to_be16(vlan | pcp);
2232 }
2233 } else {
2234 sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0;
2235 if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
2236 sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
2237 }
2238 sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
2239 if (!sqp->qp.ibqp.qp_num)
2240 ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey);
2241 else
2242 ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey);
2243 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
2244 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2245 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
2246 sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
2247 sqp->qkey : wr->wr.ud.remote_qkey);
2248 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
2249
2250 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
2251
2252 if (0) {
2253 pr_err("built UD header of size %d:\n", header_size);
2254 for (i = 0; i < header_size / 4; ++i) {
2255 if (i % 8 == 0)
2256 pr_err(" [%02x] ", i * 4);
2257 pr_cont(" %08x",
2258 be32_to_cpu(((__be32 *) sqp->header_buf)[i]));
2259 if ((i + 1) % 8 == 0)
2260 pr_cont("\n");
2261 }
2262 pr_err("\n");
2263 }
2264
2265 /*
2266 * Inline data segments may not cross a 64 byte boundary. If
2267 * our UD header is bigger than the space available up to the
2268 * next 64 byte boundary in the WQE, use two inline data
2269 * segments to hold the UD header.
2270 */
2271 spc = MLX4_INLINE_ALIGN -
2272 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2273 if (header_size <= spc) {
2274 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
2275 memcpy(inl + 1, sqp->header_buf, header_size);
2276 i = 1;
2277 } else {
2278 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2279 memcpy(inl + 1, sqp->header_buf, spc);
2280
2281 inl = (void *) (inl + 1) + spc;
2282 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
2283 /*
2284 * Need a barrier here to make sure all the data is
2285 * visible before the byte_count field is set.
2286 * Otherwise the HCA prefetcher could grab the 64-byte
2287 * chunk with this inline segment and get a valid (!=
2288 * 0xffffffff) byte count but stale data, and end up
2289 * generating a packet with bad headers.
2290 *
2291 * The first inline segment's byte_count field doesn't
2292 * need a barrier, because it comes after a
2293 * control/MLX segment and therefore is at an offset
2294 * of 16 mod 64.
2295 */
2296 wmb();
2297 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
2298 i = 2;
2299 }
2300
2301 *mlx_seg_len =
2302 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
2303 return 0;
2304 }
2305
2306 static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
2307 {
2308 unsigned cur;
2309 struct mlx4_ib_cq *cq;
2310
2311 cur = wq->head - wq->tail;
2312 if (likely(cur + nreq < wq->max_post))
2313 return 0;
2314
2315 cq = to_mcq(ib_cq);
2316 spin_lock(&cq->lock);
2317 cur = wq->head - wq->tail;
2318 spin_unlock(&cq->lock);
2319
2320 return cur + nreq >= wq->max_post;
2321 }
2322
2323 static __be32 convert_access(int acc)
2324 {
2325 return (acc & IB_ACCESS_REMOTE_ATOMIC ?
2326 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC) : 0) |
2327 (acc & IB_ACCESS_REMOTE_WRITE ?
2328 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE) : 0) |
2329 (acc & IB_ACCESS_REMOTE_READ ?
2330 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ) : 0) |
2331 (acc & IB_ACCESS_LOCAL_WRITE ? cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_WRITE) : 0) |
2332 cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_READ);
2333 }
2334
2335 static void set_fmr_seg(struct mlx4_wqe_fmr_seg *fseg, struct ib_send_wr *wr)
2336 {
2337 struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(wr->wr.fast_reg.page_list);
2338 int i;
2339
2340 for (i = 0; i < wr->wr.fast_reg.page_list_len; ++i)
2341 mfrpl->mapped_page_list[i] =
2342 cpu_to_be64(wr->wr.fast_reg.page_list->page_list[i] |
2343 MLX4_MTT_FLAG_PRESENT);
2344
2345 fseg->flags = convert_access(wr->wr.fast_reg.access_flags);
2346 fseg->mem_key = cpu_to_be32(wr->wr.fast_reg.rkey);
2347 fseg->buf_list = cpu_to_be64(mfrpl->map);
2348 fseg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start);
2349 fseg->reg_len = cpu_to_be64(wr->wr.fast_reg.length);
2350 fseg->offset = 0; /* XXX -- is this just for ZBVA? */
2351 fseg->page_size = cpu_to_be32(wr->wr.fast_reg.page_shift);
2352 fseg->reserved[0] = 0;
2353 fseg->reserved[1] = 0;
2354 }
2355
2356 static void set_bind_seg(struct mlx4_wqe_bind_seg *bseg, struct ib_send_wr *wr)
2357 {
2358 bseg->flags1 =
2359 convert_access(wr->wr.bind_mw.bind_info.mw_access_flags) &
2360 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ |
2361 MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE |
2362 MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC);
2363 bseg->flags2 = 0;
2364 if (wr->wr.bind_mw.mw->type == IB_MW_TYPE_2)
2365 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_TYPE_2);
2366 if (wr->wr.bind_mw.bind_info.mw_access_flags & IB_ZERO_BASED)
2367 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_ZERO_BASED);
2368 bseg->new_rkey = cpu_to_be32(wr->wr.bind_mw.rkey);
2369 bseg->lkey = cpu_to_be32(wr->wr.bind_mw.bind_info.mr->lkey);
2370 bseg->addr = cpu_to_be64(wr->wr.bind_mw.bind_info.addr);
2371 bseg->length = cpu_to_be64(wr->wr.bind_mw.bind_info.length);
2372 }
2373
2374 static void set_local_inv_seg(struct mlx4_wqe_local_inval_seg *iseg, u32 rkey)
2375 {
2376 memset(iseg, 0, sizeof(*iseg));
2377 iseg->mem_key = cpu_to_be32(rkey);
2378 }
2379
2380 static __always_inline void set_raddr_seg(struct mlx4_wqe_raddr_seg *rseg,
2381 u64 remote_addr, u32 rkey)
2382 {
2383 rseg->raddr = cpu_to_be64(remote_addr);
2384 rseg->rkey = cpu_to_be32(rkey);
2385 rseg->reserved = 0;
2386 }
2387
2388 static void set_atomic_seg(struct mlx4_wqe_atomic_seg *aseg, struct ib_send_wr *wr)
2389 {
2390 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
2391 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
2392 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
2393 } else if (wr->opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) {
2394 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2395 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2396 } else {
2397 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2398 aseg->compare = 0;
2399 }
2400
2401 }
2402
2403 static void set_masked_atomic_seg(struct mlx4_wqe_masked_atomic_seg *aseg,
2404 struct ib_send_wr *wr)
2405 {
2406 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
2407 aseg->swap_add_mask = cpu_to_be64(wr->wr.atomic.swap_mask);
2408 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
2409 aseg->compare_mask = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2410 }
2411
2412 static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg,
2413 struct ib_send_wr *wr)
2414 {
2415 memcpy(dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av));
2416 dseg->dqpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2417 dseg->qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2418 dseg->vlan = to_mah(wr->wr.ud.ah)->av.eth.vlan;
2419 memcpy(dseg->mac, to_mah(wr->wr.ud.ah)->av.eth.mac, 6);
2420 }
2421
2422 static void set_tunnel_datagram_seg(struct mlx4_ib_dev *dev,
2423 struct mlx4_wqe_datagram_seg *dseg,
2424 struct ib_send_wr *wr,
2425 enum mlx4_ib_qp_type qpt)
2426 {
2427 union mlx4_ext_av *av = &to_mah(wr->wr.ud.ah)->av;
2428 struct mlx4_av sqp_av = {0};
2429 int port = *((u8 *) &av->ib.port_pd) & 0x3;
2430
2431 /* force loopback */
2432 sqp_av.port_pd = av->ib.port_pd | cpu_to_be32(0x80000000);
2433 sqp_av.g_slid = av->ib.g_slid & 0x7f; /* no GRH */
2434 sqp_av.sl_tclass_flowlabel = av->ib.sl_tclass_flowlabel &
2435 cpu_to_be32(0xf0000000);
2436
2437 memcpy(dseg->av, &sqp_av, sizeof (struct mlx4_av));
2438 if (qpt == MLX4_IB_QPT_PROXY_GSI)
2439 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp1_tunnel[port - 1]);
2440 else
2441 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp0_tunnel[port - 1]);
2442 /* Use QKEY from the QP context, which is set by master */
2443 dseg->qkey = cpu_to_be32(IB_QP_SET_QKEY);
2444 }
2445
2446 static void build_tunnel_header(struct ib_send_wr *wr, void *wqe, unsigned *mlx_seg_len)
2447 {
2448 struct mlx4_wqe_inline_seg *inl = wqe;
2449 struct mlx4_ib_tunnel_header hdr;
2450 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2451 int spc;
2452 int i;
2453
2454 memcpy(&hdr.av, &ah->av, sizeof hdr.av);
2455 hdr.remote_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2456 hdr.pkey_index = cpu_to_be16(wr->wr.ud.pkey_index);
2457 hdr.qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2458 memcpy(hdr.mac, ah->av.eth.mac, 6);
2459 hdr.vlan = ah->av.eth.vlan;
2460
2461 spc = MLX4_INLINE_ALIGN -
2462 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2463 if (sizeof (hdr) <= spc) {
2464 memcpy(inl + 1, &hdr, sizeof (hdr));
2465 wmb();
2466 inl->byte_count = cpu_to_be32(1 << 31 | sizeof (hdr));
2467 i = 1;
2468 } else {
2469 memcpy(inl + 1, &hdr, spc);
2470 wmb();
2471 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2472
2473 inl = (void *) (inl + 1) + spc;
2474 memcpy(inl + 1, (void *) &hdr + spc, sizeof (hdr) - spc);
2475 wmb();
2476 inl->byte_count = cpu_to_be32(1 << 31 | (sizeof (hdr) - spc));
2477 i = 2;
2478 }
2479
2480 *mlx_seg_len =
2481 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + sizeof (hdr), 16);
2482 }
2483
2484 static void set_mlx_icrc_seg(void *dseg)
2485 {
2486 u32 *t = dseg;
2487 struct mlx4_wqe_inline_seg *iseg = dseg;
2488
2489 t[1] = 0;
2490
2491 /*
2492 * Need a barrier here before writing the byte_count field to
2493 * make sure that all the data is visible before the
2494 * byte_count field is set. Otherwise, if the segment begins
2495 * a new cacheline, the HCA prefetcher could grab the 64-byte
2496 * chunk and get a valid (!= * 0xffffffff) byte count but
2497 * stale data, and end up sending the wrong data.
2498 */
2499 wmb();
2500
2501 iseg->byte_count = cpu_to_be32((1 << 31) | 4);
2502 }
2503
2504 static void set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2505 {
2506 dseg->lkey = cpu_to_be32(sg->lkey);
2507 dseg->addr = cpu_to_be64(sg->addr);
2508
2509 /*
2510 * Need a barrier here before writing the byte_count field to
2511 * make sure that all the data is visible before the
2512 * byte_count field is set. Otherwise, if the segment begins
2513 * a new cacheline, the HCA prefetcher could grab the 64-byte
2514 * chunk and get a valid (!= * 0xffffffff) byte count but
2515 * stale data, and end up sending the wrong data.
2516 */
2517 wmb();
2518
2519 dseg->byte_count = cpu_to_be32(sg->length);
2520 }
2521
2522 static void __set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2523 {
2524 dseg->byte_count = cpu_to_be32(sg->length);
2525 dseg->lkey = cpu_to_be32(sg->lkey);
2526 dseg->addr = cpu_to_be64(sg->addr);
2527 }
2528
2529 static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe, struct ib_send_wr *wr,
2530 struct mlx4_ib_qp *qp, unsigned *lso_seg_len,
2531 __be32 *lso_hdr_sz, __be32 *blh)
2532 {
2533 unsigned halign = ALIGN(sizeof *wqe + wr->wr.ud.hlen, 16);
2534
2535 if (unlikely(halign > MLX4_IB_CACHE_LINE_SIZE))
2536 *blh = cpu_to_be32(1 << 6);
2537
2538 if (unlikely(!(qp->flags & MLX4_IB_QP_LSO) &&
2539 wr->num_sge > qp->sq.max_gs - (halign >> 4)))
2540 return -EINVAL;
2541
2542 memcpy(wqe->header, wr->wr.ud.header, wr->wr.ud.hlen);
2543
2544 *lso_hdr_sz = cpu_to_be32((wr->wr.ud.mss - wr->wr.ud.hlen) << 16 |
2545 wr->wr.ud.hlen);
2546 *lso_seg_len = halign;
2547 return 0;
2548 }
2549
2550 static __be32 send_ieth(struct ib_send_wr *wr)
2551 {
2552 switch (wr->opcode) {
2553 case IB_WR_SEND_WITH_IMM:
2554 case IB_WR_RDMA_WRITE_WITH_IMM:
2555 return wr->ex.imm_data;
2556
2557 case IB_WR_SEND_WITH_INV:
2558 return cpu_to_be32(wr->ex.invalidate_rkey);
2559
2560 default:
2561 return 0;
2562 }
2563 }
2564
2565 static void add_zero_len_inline(void *wqe)
2566 {
2567 struct mlx4_wqe_inline_seg *inl = wqe;
2568 memset(wqe, 0, 16);
2569 inl->byte_count = cpu_to_be32(1 << 31);
2570 }
2571
2572 int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
2573 struct ib_send_wr **bad_wr)
2574 {
2575 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2576 void *wqe;
2577 struct mlx4_wqe_ctrl_seg *ctrl;
2578 struct mlx4_wqe_data_seg *dseg;
2579 unsigned long flags;
2580 int nreq;
2581 int err = 0;
2582 unsigned ind;
2583 int uninitialized_var(stamp);
2584 int uninitialized_var(size);
2585 unsigned uninitialized_var(seglen);
2586 __be32 dummy;
2587 __be32 *lso_wqe;
2588 __be32 uninitialized_var(lso_hdr_sz);
2589 __be32 blh;
2590 int i;
2591
2592 spin_lock_irqsave(&qp->sq.lock, flags);
2593
2594 ind = qp->sq_next_wqe;
2595
2596 for (nreq = 0; wr; ++nreq, wr = wr->next) {
2597 lso_wqe = &dummy;
2598 blh = 0;
2599
2600 if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
2601 err = -ENOMEM;
2602 *bad_wr = wr;
2603 goto out;
2604 }
2605
2606 if (unlikely(wr->num_sge > qp->sq.max_gs)) {
2607 err = -EINVAL;
2608 *bad_wr = wr;
2609 goto out;
2610 }
2611
2612 ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
2613 qp->sq.wrid[(qp->sq.head + nreq) & (qp->sq.wqe_cnt - 1)] = wr->wr_id;
2614
2615 ctrl->srcrb_flags =
2616 (wr->send_flags & IB_SEND_SIGNALED ?
2617 cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) |
2618 (wr->send_flags & IB_SEND_SOLICITED ?
2619 cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) |
2620 ((wr->send_flags & IB_SEND_IP_CSUM) ?
2621 cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
2622 MLX4_WQE_CTRL_TCP_UDP_CSUM) : 0) |
2623 qp->sq_signal_bits;
2624
2625 ctrl->imm = send_ieth(wr);
2626
2627 wqe += sizeof *ctrl;
2628 size = sizeof *ctrl / 16;
2629
2630 switch (qp->mlx4_ib_qp_type) {
2631 case MLX4_IB_QPT_RC:
2632 case MLX4_IB_QPT_UC:
2633 switch (wr->opcode) {
2634 case IB_WR_ATOMIC_CMP_AND_SWP:
2635 case IB_WR_ATOMIC_FETCH_AND_ADD:
2636 case IB_WR_MASKED_ATOMIC_FETCH_AND_ADD:
2637 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2638 wr->wr.atomic.rkey);
2639 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2640
2641 set_atomic_seg(wqe, wr);
2642 wqe += sizeof (struct mlx4_wqe_atomic_seg);
2643
2644 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2645 sizeof (struct mlx4_wqe_atomic_seg)) / 16;
2646
2647 break;
2648
2649 case IB_WR_MASKED_ATOMIC_CMP_AND_SWP:
2650 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2651 wr->wr.atomic.rkey);
2652 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2653
2654 set_masked_atomic_seg(wqe, wr);
2655 wqe += sizeof (struct mlx4_wqe_masked_atomic_seg);
2656
2657 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2658 sizeof (struct mlx4_wqe_masked_atomic_seg)) / 16;
2659
2660 break;
2661
2662 case IB_WR_RDMA_READ:
2663 case IB_WR_RDMA_WRITE:
2664 case IB_WR_RDMA_WRITE_WITH_IMM:
2665 set_raddr_seg(wqe, wr->wr.rdma.remote_addr,
2666 wr->wr.rdma.rkey);
2667 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2668 size += sizeof (struct mlx4_wqe_raddr_seg) / 16;
2669 break;
2670
2671 case IB_WR_LOCAL_INV:
2672 ctrl->srcrb_flags |=
2673 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2674 set_local_inv_seg(wqe, wr->ex.invalidate_rkey);
2675 wqe += sizeof (struct mlx4_wqe_local_inval_seg);
2676 size += sizeof (struct mlx4_wqe_local_inval_seg) / 16;
2677 break;
2678
2679 case IB_WR_FAST_REG_MR:
2680 ctrl->srcrb_flags |=
2681 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2682 set_fmr_seg(wqe, wr);
2683 wqe += sizeof (struct mlx4_wqe_fmr_seg);
2684 size += sizeof (struct mlx4_wqe_fmr_seg) / 16;
2685 break;
2686
2687 case IB_WR_BIND_MW:
2688 ctrl->srcrb_flags |=
2689 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2690 set_bind_seg(wqe, wr);
2691 wqe += sizeof(struct mlx4_wqe_bind_seg);
2692 size += sizeof(struct mlx4_wqe_bind_seg) / 16;
2693 break;
2694 default:
2695 /* No extra segments required for sends */
2696 break;
2697 }
2698 break;
2699
2700 case MLX4_IB_QPT_TUN_SMI_OWNER:
2701 err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2702 if (unlikely(err)) {
2703 *bad_wr = wr;
2704 goto out;
2705 }
2706 wqe += seglen;
2707 size += seglen / 16;
2708 break;
2709 case MLX4_IB_QPT_TUN_SMI:
2710 case MLX4_IB_QPT_TUN_GSI:
2711 /* this is a UD qp used in MAD responses to slaves. */
2712 set_datagram_seg(wqe, wr);
2713 /* set the forced-loopback bit in the data seg av */
2714 *(__be32 *) wqe |= cpu_to_be32(0x80000000);
2715 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2716 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2717 break;
2718 case MLX4_IB_QPT_UD:
2719 set_datagram_seg(wqe, wr);
2720 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2721 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2722
2723 if (wr->opcode == IB_WR_LSO) {
2724 err = build_lso_seg(wqe, wr, qp, &seglen, &lso_hdr_sz, &blh);
2725 if (unlikely(err)) {
2726 *bad_wr = wr;
2727 goto out;
2728 }
2729 lso_wqe = (__be32 *) wqe;
2730 wqe += seglen;
2731 size += seglen / 16;
2732 }
2733 break;
2734
2735 case MLX4_IB_QPT_PROXY_SMI_OWNER:
2736 err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2737 if (unlikely(err)) {
2738 *bad_wr = wr;
2739 goto out;
2740 }
2741 wqe += seglen;
2742 size += seglen / 16;
2743 /* to start tunnel header on a cache-line boundary */
2744 add_zero_len_inline(wqe);
2745 wqe += 16;
2746 size++;
2747 build_tunnel_header(wr, wqe, &seglen);
2748 wqe += seglen;
2749 size += seglen / 16;
2750 break;
2751 case MLX4_IB_QPT_PROXY_SMI:
2752 case MLX4_IB_QPT_PROXY_GSI:
2753 /* If we are tunneling special qps, this is a UD qp.
2754 * In this case we first add a UD segment targeting
2755 * the tunnel qp, and then add a header with address
2756 * information */
2757 set_tunnel_datagram_seg(to_mdev(ibqp->device), wqe, wr,
2758 qp->mlx4_ib_qp_type);
2759 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2760 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2761 build_tunnel_header(wr, wqe, &seglen);
2762 wqe += seglen;
2763 size += seglen / 16;
2764 break;
2765
2766 case MLX4_IB_QPT_SMI:
2767 case MLX4_IB_QPT_GSI:
2768 err = build_mlx_header(to_msqp(qp), wr, ctrl, &seglen);
2769 if (unlikely(err)) {
2770 *bad_wr = wr;
2771 goto out;
2772 }
2773 wqe += seglen;
2774 size += seglen / 16;
2775 break;
2776
2777 default:
2778 break;
2779 }
2780
2781 /*
2782 * Write data segments in reverse order, so as to
2783 * overwrite cacheline stamp last within each
2784 * cacheline. This avoids issues with WQE
2785 * prefetching.
2786 */
2787
2788 dseg = wqe;
2789 dseg += wr->num_sge - 1;
2790 size += wr->num_sge * (sizeof (struct mlx4_wqe_data_seg) / 16);
2791
2792 /* Add one more inline data segment for ICRC for MLX sends */
2793 if (unlikely(qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
2794 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI ||
2795 qp->mlx4_ib_qp_type &
2796 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))) {
2797 set_mlx_icrc_seg(dseg + 1);
2798 size += sizeof (struct mlx4_wqe_data_seg) / 16;
2799 }
2800
2801 for (i = wr->num_sge - 1; i >= 0; --i, --dseg)
2802 set_data_seg(dseg, wr->sg_list + i);
2803
2804 /*
2805 * Possibly overwrite stamping in cacheline with LSO
2806 * segment only after making sure all data segments
2807 * are written.
2808 */
2809 wmb();
2810 *lso_wqe = lso_hdr_sz;
2811
2812 ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ?
2813 MLX4_WQE_CTRL_FENCE : 0) | size;
2814
2815 /*
2816 * Make sure descriptor is fully written before
2817 * setting ownership bit (because HW can start
2818 * executing as soon as we do).
2819 */
2820 wmb();
2821
2822 if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) {
2823 *bad_wr = wr;
2824 err = -EINVAL;
2825 goto out;
2826 }
2827
2828 ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] |
2829 (ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0) | blh;
2830
2831 stamp = ind + qp->sq_spare_wqes;
2832 ind += DIV_ROUND_UP(size * 16, 1U << qp->sq.wqe_shift);
2833
2834 /*
2835 * We can improve latency by not stamping the last
2836 * send queue WQE until after ringing the doorbell, so
2837 * only stamp here if there are still more WQEs to post.
2838 *
2839 * Same optimization applies to padding with NOP wqe
2840 * in case of WQE shrinking (used to prevent wrap-around
2841 * in the middle of WR).
2842 */
2843 if (wr->next) {
2844 stamp_send_wqe(qp, stamp, size * 16);
2845 ind = pad_wraparound(qp, ind);
2846 }
2847 }
2848
2849 out:
2850 if (likely(nreq)) {
2851 qp->sq.head += nreq;
2852
2853 /*
2854 * Make sure that descriptors are written before
2855 * doorbell record.
2856 */
2857 wmb();
2858
2859 writel(qp->doorbell_qpn,
2860 to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL);
2861
2862 /*
2863 * Make sure doorbells don't leak out of SQ spinlock
2864 * and reach the HCA out of order.
2865 */
2866 mmiowb();
2867
2868 stamp_send_wqe(qp, stamp, size * 16);
2869
2870 ind = pad_wraparound(qp, ind);
2871 qp->sq_next_wqe = ind;
2872 }
2873
2874 spin_unlock_irqrestore(&qp->sq.lock, flags);
2875
2876 return err;
2877 }
2878
2879 int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
2880 struct ib_recv_wr **bad_wr)
2881 {
2882 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2883 struct mlx4_wqe_data_seg *scat;
2884 unsigned long flags;
2885 int err = 0;
2886 int nreq;
2887 int ind;
2888 int max_gs;
2889 int i;
2890
2891 max_gs = qp->rq.max_gs;
2892 spin_lock_irqsave(&qp->rq.lock, flags);
2893
2894 ind = qp->rq.head & (qp->rq.wqe_cnt - 1);
2895
2896 for (nreq = 0; wr; ++nreq, wr = wr->next) {
2897 if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
2898 err = -ENOMEM;
2899 *bad_wr = wr;
2900 goto out;
2901 }
2902
2903 if (unlikely(wr->num_sge > qp->rq.max_gs)) {
2904 err = -EINVAL;
2905 *bad_wr = wr;
2906 goto out;
2907 }
2908
2909 scat = get_recv_wqe(qp, ind);
2910
2911 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
2912 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
2913 ib_dma_sync_single_for_device(ibqp->device,
2914 qp->sqp_proxy_rcv[ind].map,
2915 sizeof (struct mlx4_ib_proxy_sqp_hdr),
2916 DMA_FROM_DEVICE);
2917 scat->byte_count =
2918 cpu_to_be32(sizeof (struct mlx4_ib_proxy_sqp_hdr));
2919 /* use dma lkey from upper layer entry */
2920 scat->lkey = cpu_to_be32(wr->sg_list->lkey);
2921 scat->addr = cpu_to_be64(qp->sqp_proxy_rcv[ind].map);
2922 scat++;
2923 max_gs--;
2924 }
2925
2926 for (i = 0; i < wr->num_sge; ++i)
2927 __set_data_seg(scat + i, wr->sg_list + i);
2928
2929 if (i < max_gs) {
2930 scat[i].byte_count = 0;
2931 scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY);
2932 scat[i].addr = 0;
2933 }
2934
2935 qp->rq.wrid[ind] = wr->wr_id;
2936
2937 ind = (ind + 1) & (qp->rq.wqe_cnt - 1);
2938 }
2939
2940 out:
2941 if (likely(nreq)) {
2942 qp->rq.head += nreq;
2943
2944 /*
2945 * Make sure that descriptors are written before
2946 * doorbell record.
2947 */
2948 wmb();
2949
2950 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
2951 }
2952
2953 spin_unlock_irqrestore(&qp->rq.lock, flags);
2954
2955 return err;
2956 }
2957
2958 static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state)
2959 {
2960 switch (mlx4_state) {
2961 case MLX4_QP_STATE_RST: return IB_QPS_RESET;
2962 case MLX4_QP_STATE_INIT: return IB_QPS_INIT;
2963 case MLX4_QP_STATE_RTR: return IB_QPS_RTR;
2964 case MLX4_QP_STATE_RTS: return IB_QPS_RTS;
2965 case MLX4_QP_STATE_SQ_DRAINING:
2966 case MLX4_QP_STATE_SQD: return IB_QPS_SQD;
2967 case MLX4_QP_STATE_SQER: return IB_QPS_SQE;
2968 case MLX4_QP_STATE_ERR: return IB_QPS_ERR;
2969 default: return -1;
2970 }
2971 }
2972
2973 static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state)
2974 {
2975 switch (mlx4_mig_state) {
2976 case MLX4_QP_PM_ARMED: return IB_MIG_ARMED;
2977 case MLX4_QP_PM_REARM: return IB_MIG_REARM;
2978 case MLX4_QP_PM_MIGRATED: return IB_MIG_MIGRATED;
2979 default: return -1;
2980 }
2981 }
2982
2983 static int to_ib_qp_access_flags(int mlx4_flags)
2984 {
2985 int ib_flags = 0;
2986
2987 if (mlx4_flags & MLX4_QP_BIT_RRE)
2988 ib_flags |= IB_ACCESS_REMOTE_READ;
2989 if (mlx4_flags & MLX4_QP_BIT_RWE)
2990 ib_flags |= IB_ACCESS_REMOTE_WRITE;
2991 if (mlx4_flags & MLX4_QP_BIT_RAE)
2992 ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
2993
2994 return ib_flags;
2995 }
2996
2997 static void to_ib_ah_attr(struct mlx4_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr,
2998 struct mlx4_qp_path *path)
2999 {
3000 struct mlx4_dev *dev = ibdev->dev;
3001 int is_eth;
3002
3003 memset(ib_ah_attr, 0, sizeof *ib_ah_attr);
3004 ib_ah_attr->port_num = path->sched_queue & 0x40 ? 2 : 1;
3005
3006 if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports)
3007 return;
3008
3009 is_eth = rdma_port_get_link_layer(&ibdev->ib_dev, ib_ah_attr->port_num) ==
3010 IB_LINK_LAYER_ETHERNET;
3011 if (is_eth)
3012 ib_ah_attr->sl = ((path->sched_queue >> 3) & 0x7) |
3013 ((path->sched_queue & 4) << 1);
3014 else
3015 ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf;
3016
3017 ib_ah_attr->dlid = be16_to_cpu(path->rlid);
3018 ib_ah_attr->src_path_bits = path->grh_mylmc & 0x7f;
3019 ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0;
3020 ib_ah_attr->ah_flags = (path->grh_mylmc & (1 << 7)) ? IB_AH_GRH : 0;
3021 if (ib_ah_attr->ah_flags) {
3022 ib_ah_attr->grh.sgid_index = path->mgid_index;
3023 ib_ah_attr->grh.hop_limit = path->hop_limit;
3024 ib_ah_attr->grh.traffic_class =
3025 (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff;
3026 ib_ah_attr->grh.flow_label =
3027 be32_to_cpu(path->tclass_flowlabel) & 0xfffff;
3028 memcpy(ib_ah_attr->grh.dgid.raw,
3029 path->rgid, sizeof ib_ah_attr->grh.dgid.raw);
3030 }
3031 }
3032
3033 int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
3034 struct ib_qp_init_attr *qp_init_attr)
3035 {
3036 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
3037 struct mlx4_ib_qp *qp = to_mqp(ibqp);
3038 struct mlx4_qp_context context;
3039 int mlx4_state;
3040 int err = 0;
3041
3042 mutex_lock(&qp->mutex);
3043
3044 if (qp->state == IB_QPS_RESET) {
3045 qp_attr->qp_state = IB_QPS_RESET;
3046 goto done;
3047 }
3048
3049 err = mlx4_qp_query(dev->dev, &qp->mqp, &context);
3050 if (err) {
3051 err = -EINVAL;
3052 goto out;
3053 }
3054
3055 mlx4_state = be32_to_cpu(context.flags) >> 28;
3056
3057 qp->state = to_ib_qp_state(mlx4_state);
3058 qp_attr->qp_state = qp->state;
3059 qp_attr->path_mtu = context.mtu_msgmax >> 5;
3060 qp_attr->path_mig_state =
3061 to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3);
3062 qp_attr->qkey = be32_to_cpu(context.qkey);
3063 qp_attr->rq_psn = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff;
3064 qp_attr->sq_psn = be32_to_cpu(context.next_send_psn) & 0xffffff;
3065 qp_attr->dest_qp_num = be32_to_cpu(context.remote_qpn) & 0xffffff;
3066 qp_attr->qp_access_flags =
3067 to_ib_qp_access_flags(be32_to_cpu(context.params2));
3068
3069 if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) {
3070 to_ib_ah_attr(dev, &qp_attr->ah_attr, &context.pri_path);
3071 to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context.alt_path);
3072 qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f;
3073 qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num;
3074 }
3075
3076 qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f;
3077 if (qp_attr->qp_state == IB_QPS_INIT)
3078 qp_attr->port_num = qp->port;
3079 else
3080 qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1;
3081
3082 /* qp_attr->en_sqd_async_notify is only applicable in modify qp */
3083 qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING;
3084
3085 qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7);
3086
3087 qp_attr->max_dest_rd_atomic =
3088 1 << ((be32_to_cpu(context.params2) >> 21) & 0x7);
3089 qp_attr->min_rnr_timer =
3090 (be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f;
3091 qp_attr->timeout = context.pri_path.ackto >> 3;
3092 qp_attr->retry_cnt = (be32_to_cpu(context.params1) >> 16) & 0x7;
3093 qp_attr->rnr_retry = (be32_to_cpu(context.params1) >> 13) & 0x7;
3094 qp_attr->alt_timeout = context.alt_path.ackto >> 3;
3095
3096 done:
3097 qp_attr->cur_qp_state = qp_attr->qp_state;
3098 qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt;
3099 qp_attr->cap.max_recv_sge = qp->rq.max_gs;
3100
3101 if (!ibqp->uobject) {
3102 qp_attr->cap.max_send_wr = qp->sq.wqe_cnt;
3103 qp_attr->cap.max_send_sge = qp->sq.max_gs;
3104 } else {
3105 qp_attr->cap.max_send_wr = 0;
3106 qp_attr->cap.max_send_sge = 0;
3107 }
3108
3109 /*
3110 * We don't support inline sends for kernel QPs (yet), and we
3111 * don't know what userspace's value should be.
3112 */
3113 qp_attr->cap.max_inline_data = 0;
3114
3115 qp_init_attr->cap = qp_attr->cap;
3116
3117 qp_init_attr->create_flags = 0;
3118 if (qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK)
3119 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
3120
3121 if (qp->flags & MLX4_IB_QP_LSO)
3122 qp_init_attr->create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
3123
3124 if (qp->flags & MLX4_IB_QP_NETIF)
3125 qp_init_attr->create_flags |= IB_QP_CREATE_NETIF_QP;
3126
3127 qp_init_attr->sq_sig_type =
3128 qp->sq_signal_bits == cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) ?
3129 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
3130
3131 out:
3132 mutex_unlock(&qp->mutex);
3133 return err;
3134 }
3135
Linux kernel - Deliverables
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