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fix a kmap leak in virtio_console
[linux/fpc-iii.git] / drivers / infiniband / hw / mlx4 / qp.c
blobd8f4d1fe849430ceb40eab47470d5af033884694
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 create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
612 struct ib_qp_init_attr *init_attr,
613 struct ib_udata *udata, int sqpn, struct mlx4_ib_qp **caller_qp)
614 {
615 int qpn;
616 int err;
617 struct mlx4_ib_sqp *sqp;
618 struct mlx4_ib_qp *qp;
619 enum mlx4_ib_qp_type qp_type = (enum mlx4_ib_qp_type) init_attr->qp_type;
620
621 /* When tunneling special qps, we use a plain UD qp */
622 if (sqpn) {
623 if (mlx4_is_mfunc(dev->dev) &&
624 (!mlx4_is_master(dev->dev) ||
625 !(init_attr->create_flags & MLX4_IB_SRIOV_SQP))) {
626 if (init_attr->qp_type == IB_QPT_GSI)
627 qp_type = MLX4_IB_QPT_PROXY_GSI;
628 else if (mlx4_is_master(dev->dev))
629 qp_type = MLX4_IB_QPT_PROXY_SMI_OWNER;
630 else
631 qp_type = MLX4_IB_QPT_PROXY_SMI;
632 }
633 qpn = sqpn;
634 /* add extra sg entry for tunneling */
635 init_attr->cap.max_recv_sge++;
636 } else if (init_attr->create_flags & MLX4_IB_SRIOV_TUNNEL_QP) {
637 struct mlx4_ib_qp_tunnel_init_attr *tnl_init =
638 container_of(init_attr,
639 struct mlx4_ib_qp_tunnel_init_attr, init_attr);
640 if ((tnl_init->proxy_qp_type != IB_QPT_SMI &&
641 tnl_init->proxy_qp_type != IB_QPT_GSI) ||
642 !mlx4_is_master(dev->dev))
643 return -EINVAL;
644 if (tnl_init->proxy_qp_type == IB_QPT_GSI)
645 qp_type = MLX4_IB_QPT_TUN_GSI;
646 else if (tnl_init->slave == mlx4_master_func_num(dev->dev))
647 qp_type = MLX4_IB_QPT_TUN_SMI_OWNER;
648 else
649 qp_type = MLX4_IB_QPT_TUN_SMI;
650 /* we are definitely in the PPF here, since we are creating
651 * tunnel QPs. base_tunnel_sqpn is therefore valid. */
652 qpn = dev->dev->phys_caps.base_tunnel_sqpn + 8 * tnl_init->slave
653 + tnl_init->proxy_qp_type * 2 + tnl_init->port - 1;
654 sqpn = qpn;
655 }
656
657 if (!*caller_qp) {
658 if (qp_type == MLX4_IB_QPT_SMI || qp_type == MLX4_IB_QPT_GSI ||
659 (qp_type & (MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_SMI_OWNER |
660 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER))) {
661 sqp = kzalloc(sizeof (struct mlx4_ib_sqp), GFP_KERNEL);
662 if (!sqp)
663 return -ENOMEM;
664 qp = &sqp->qp;
665 } else {
666 qp = kzalloc(sizeof (struct mlx4_ib_qp), GFP_KERNEL);
667 if (!qp)
668 return -ENOMEM;
669 }
670 } else
671 qp = *caller_qp;
672
673 qp->mlx4_ib_qp_type = qp_type;
674
675 mutex_init(&qp->mutex);
676 spin_lock_init(&qp->sq.lock);
677 spin_lock_init(&qp->rq.lock);
678 INIT_LIST_HEAD(&qp->gid_list);
679 INIT_LIST_HEAD(&qp->steering_rules);
680
681 qp->state = IB_QPS_RESET;
682 if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
683 qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
684
685 err = set_rq_size(dev, &init_attr->cap, !!pd->uobject, qp_has_rq(init_attr), qp);
686 if (err)
687 goto err;
688
689 if (pd->uobject) {
690 struct mlx4_ib_create_qp ucmd;
691
692 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
693 err = -EFAULT;
694 goto err;
695 }
696
697 qp->sq_no_prefetch = ucmd.sq_no_prefetch;
698
699 err = set_user_sq_size(dev, qp, &ucmd);
700 if (err)
701 goto err;
702
703 qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
704 qp->buf_size, 0, 0);
705 if (IS_ERR(qp->umem)) {
706 err = PTR_ERR(qp->umem);
707 goto err;
708 }
709
710 err = mlx4_mtt_init(dev->dev, ib_umem_page_count(qp->umem),
711 ilog2(qp->umem->page_size), &qp->mtt);
712 if (err)
713 goto err_buf;
714
715 err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem);
716 if (err)
717 goto err_mtt;
718
719 if (qp_has_rq(init_attr)) {
720 err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context),
721 ucmd.db_addr, &qp->db);
722 if (err)
723 goto err_mtt;
724 }
725 } else {
726 qp->sq_no_prefetch = 0;
727
728 if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK)
729 qp->flags |= MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK;
730
731 if (init_attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO)
732 qp->flags |= MLX4_IB_QP_LSO;
733
734 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) {
735 if (dev->steering_support ==
736 MLX4_STEERING_MODE_DEVICE_MANAGED)
737 qp->flags |= MLX4_IB_QP_NETIF;
738 else
739 goto err;
740 }
741
742 err = set_kernel_sq_size(dev, &init_attr->cap, qp_type, qp);
743 if (err)
744 goto err;
745
746 if (qp_has_rq(init_attr)) {
747 err = mlx4_db_alloc(dev->dev, &qp->db, 0);
748 if (err)
749 goto err;
750
751 *qp->db.db = 0;
752 }
753
754 if (mlx4_buf_alloc(dev->dev, qp->buf_size, PAGE_SIZE * 2, &qp->buf)) {
755 err = -ENOMEM;
756 goto err_db;
757 }
758
759 err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift,
760 &qp->mtt);
761 if (err)
762 goto err_buf;
763
764 err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf);
765 if (err)
766 goto err_mtt;
767
768 qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof (u64), GFP_KERNEL);
769 qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof (u64), GFP_KERNEL);
770
771 if (!qp->sq.wrid || !qp->rq.wrid) {
772 err = -ENOMEM;
773 goto err_wrid;
774 }
775 }
776
777 if (sqpn) {
778 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
779 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
780 if (alloc_proxy_bufs(pd->device, qp)) {
781 err = -ENOMEM;
782 goto err_wrid;
783 }
784 }
785 } else {
786 /* Raw packet QPNs must be aligned to 8 bits. If not, the WQE
787 * BlueFlame setup flow wrongly causes VLAN insertion. */
788 if (init_attr->qp_type == IB_QPT_RAW_PACKET)
789 err = mlx4_qp_reserve_range(dev->dev, 1, 1 << 8, &qpn);
790 else
791 if (qp->flags & MLX4_IB_QP_NETIF)
792 err = mlx4_ib_steer_qp_alloc(dev, 1, &qpn);
793 else
794 err = mlx4_qp_reserve_range(dev->dev, 1, 1,
795 &qpn);
796 if (err)
797 goto err_proxy;
798 }
799
800 err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp);
801 if (err)
802 goto err_qpn;
803
804 if (init_attr->qp_type == IB_QPT_XRC_TGT)
805 qp->mqp.qpn |= (1 << 23);
806
807 /*
808 * Hardware wants QPN written in big-endian order (after
809 * shifting) for send doorbell. Precompute this value to save
810 * a little bit when posting sends.
811 */
812 qp->doorbell_qpn = swab32(qp->mqp.qpn << 8);
813
814 qp->mqp.event = mlx4_ib_qp_event;
815 if (!*caller_qp)
816 *caller_qp = qp;
817 return 0;
818
819 err_qpn:
820 if (!sqpn) {
821 if (qp->flags & MLX4_IB_QP_NETIF)
822 mlx4_ib_steer_qp_free(dev, qpn, 1);
823 else
824 mlx4_qp_release_range(dev->dev, qpn, 1);
825 }
826 err_proxy:
827 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI)
828 free_proxy_bufs(pd->device, qp);
829 err_wrid:
830 if (pd->uobject) {
831 if (qp_has_rq(init_attr))
832 mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db);
833 } else {
834 kfree(qp->sq.wrid);
835 kfree(qp->rq.wrid);
836 }
837
838 err_mtt:
839 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
840
841 err_buf:
842 if (pd->uobject)
843 ib_umem_release(qp->umem);
844 else
845 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
846
847 err_db:
848 if (!pd->uobject && qp_has_rq(init_attr))
849 mlx4_db_free(dev->dev, &qp->db);
850
851 err:
852 if (!*caller_qp)
853 kfree(qp);
854 return err;
855 }
856
857 static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state)
858 {
859 switch (state) {
860 case IB_QPS_RESET: return MLX4_QP_STATE_RST;
861 case IB_QPS_INIT: return MLX4_QP_STATE_INIT;
862 case IB_QPS_RTR: return MLX4_QP_STATE_RTR;
863 case IB_QPS_RTS: return MLX4_QP_STATE_RTS;
864 case IB_QPS_SQD: return MLX4_QP_STATE_SQD;
865 case IB_QPS_SQE: return MLX4_QP_STATE_SQER;
866 case IB_QPS_ERR: return MLX4_QP_STATE_ERR;
867 default: return -1;
868 }
869 }
870
871 static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
872 __acquires(&send_cq->lock) __acquires(&recv_cq->lock)
873 {
874 if (send_cq == recv_cq) {
875 spin_lock_irq(&send_cq->lock);
876 __acquire(&recv_cq->lock);
877 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
878 spin_lock_irq(&send_cq->lock);
879 spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING);
880 } else {
881 spin_lock_irq(&recv_cq->lock);
882 spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING);
883 }
884 }
885
886 static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
887 __releases(&send_cq->lock) __releases(&recv_cq->lock)
888 {
889 if (send_cq == recv_cq) {
890 __release(&recv_cq->lock);
891 spin_unlock_irq(&send_cq->lock);
892 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
893 spin_unlock(&recv_cq->lock);
894 spin_unlock_irq(&send_cq->lock);
895 } else {
896 spin_unlock(&send_cq->lock);
897 spin_unlock_irq(&recv_cq->lock);
898 }
899 }
900
901 static void del_gid_entries(struct mlx4_ib_qp *qp)
902 {
903 struct mlx4_ib_gid_entry *ge, *tmp;
904
905 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
906 list_del(&ge->list);
907 kfree(ge);
908 }
909 }
910
911 static struct mlx4_ib_pd *get_pd(struct mlx4_ib_qp *qp)
912 {
913 if (qp->ibqp.qp_type == IB_QPT_XRC_TGT)
914 return to_mpd(to_mxrcd(qp->ibqp.xrcd)->pd);
915 else
916 return to_mpd(qp->ibqp.pd);
917 }
918
919 static void get_cqs(struct mlx4_ib_qp *qp,
920 struct mlx4_ib_cq **send_cq, struct mlx4_ib_cq **recv_cq)
921 {
922 switch (qp->ibqp.qp_type) {
923 case IB_QPT_XRC_TGT:
924 *send_cq = to_mcq(to_mxrcd(qp->ibqp.xrcd)->cq);
925 *recv_cq = *send_cq;
926 break;
927 case IB_QPT_XRC_INI:
928 *send_cq = to_mcq(qp->ibqp.send_cq);
929 *recv_cq = *send_cq;
930 break;
931 default:
932 *send_cq = to_mcq(qp->ibqp.send_cq);
933 *recv_cq = to_mcq(qp->ibqp.recv_cq);
934 break;
935 }
936 }
937
938 static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
939 int is_user)
940 {
941 struct mlx4_ib_cq *send_cq, *recv_cq;
942
943 if (qp->state != IB_QPS_RESET)
944 if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state),
945 MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp))
946 pr_warn("modify QP %06x to RESET failed.\n",
947 qp->mqp.qpn);
948
949 get_cqs(qp, &send_cq, &recv_cq);
950
951 mlx4_ib_lock_cqs(send_cq, recv_cq);
952
953 if (!is_user) {
954 __mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
955 qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL);
956 if (send_cq != recv_cq)
957 __mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
958 }
959
960 mlx4_qp_remove(dev->dev, &qp->mqp);
961
962 mlx4_ib_unlock_cqs(send_cq, recv_cq);
963
964 mlx4_qp_free(dev->dev, &qp->mqp);
965
966 if (!is_sqp(dev, qp) && !is_tunnel_qp(dev, qp)) {
967 if (qp->flags & MLX4_IB_QP_NETIF)
968 mlx4_ib_steer_qp_free(dev, qp->mqp.qpn, 1);
969 else
970 mlx4_qp_release_range(dev->dev, qp->mqp.qpn, 1);
971 }
972
973 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
974
975 if (is_user) {
976 if (qp->rq.wqe_cnt)
977 mlx4_ib_db_unmap_user(to_mucontext(qp->ibqp.uobject->context),
978 &qp->db);
979 ib_umem_release(qp->umem);
980 } else {
981 kfree(qp->sq.wrid);
982 kfree(qp->rq.wrid);
983 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
984 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI))
985 free_proxy_bufs(&dev->ib_dev, qp);
986 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
987 if (qp->rq.wqe_cnt)
988 mlx4_db_free(dev->dev, &qp->db);
989 }
990
991 del_gid_entries(qp);
992 }
993
994 static u32 get_sqp_num(struct mlx4_ib_dev *dev, struct ib_qp_init_attr *attr)
995 {
996 /* Native or PPF */
997 if (!mlx4_is_mfunc(dev->dev) ||
998 (mlx4_is_master(dev->dev) &&
999 attr->create_flags & MLX4_IB_SRIOV_SQP)) {
1000 return dev->dev->phys_caps.base_sqpn +
1001 (attr->qp_type == IB_QPT_SMI ? 0 : 2) +
1002 attr->port_num - 1;
1003 }
1004 /* PF or VF -- creating proxies */
1005 if (attr->qp_type == IB_QPT_SMI)
1006 return dev->dev->caps.qp0_proxy[attr->port_num - 1];
1007 else
1008 return dev->dev->caps.qp1_proxy[attr->port_num - 1];
1009 }
1010
1011 struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd,
1012 struct ib_qp_init_attr *init_attr,
1013 struct ib_udata *udata)
1014 {
1015 struct mlx4_ib_qp *qp = NULL;
1016 int err;
1017 u16 xrcdn = 0;
1018
1019 /*
1020 * We only support LSO, vendor flag1, and multicast loopback blocking,
1021 * and only for kernel UD QPs.
1022 */
1023 if (init_attr->create_flags & ~(MLX4_IB_QP_LSO |
1024 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK |
1025 MLX4_IB_SRIOV_TUNNEL_QP |
1026 MLX4_IB_SRIOV_SQP |
1027 MLX4_IB_QP_NETIF))
1028 return ERR_PTR(-EINVAL);
1029
1030 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) {
1031 if (init_attr->qp_type != IB_QPT_UD)
1032 return ERR_PTR(-EINVAL);
1033 }
1034
1035 if (init_attr->create_flags &&
1036 (udata ||
1037 ((init_attr->create_flags & ~MLX4_IB_SRIOV_SQP) &&
1038 init_attr->qp_type != IB_QPT_UD) ||
1039 ((init_attr->create_flags & MLX4_IB_SRIOV_SQP) &&
1040 init_attr->qp_type > IB_QPT_GSI)))
1041 return ERR_PTR(-EINVAL);
1042
1043 switch (init_attr->qp_type) {
1044 case IB_QPT_XRC_TGT:
1045 pd = to_mxrcd(init_attr->xrcd)->pd;
1046 xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn;
1047 init_attr->send_cq = to_mxrcd(init_attr->xrcd)->cq;
1048 /* fall through */
1049 case IB_QPT_XRC_INI:
1050 if (!(to_mdev(pd->device)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC))
1051 return ERR_PTR(-ENOSYS);
1052 init_attr->recv_cq = init_attr->send_cq;
1053 /* fall through */
1054 case IB_QPT_RC:
1055 case IB_QPT_UC:
1056 case IB_QPT_RAW_PACKET:
1057 qp = kzalloc(sizeof *qp, GFP_KERNEL);
1058 if (!qp)
1059 return ERR_PTR(-ENOMEM);
1060 /* fall through */
1061 case IB_QPT_UD:
1062 {
1063 err = create_qp_common(to_mdev(pd->device), pd, init_attr,
1064 udata, 0, &qp);
1065 if (err)
1066 return ERR_PTR(err);
1067
1068 qp->ibqp.qp_num = qp->mqp.qpn;
1069 qp->xrcdn = xrcdn;
1070
1071 break;
1072 }
1073 case IB_QPT_SMI:
1074 case IB_QPT_GSI:
1075 {
1076 /* Userspace is not allowed to create special QPs: */
1077 if (udata)
1078 return ERR_PTR(-EINVAL);
1079
1080 err = create_qp_common(to_mdev(pd->device), pd, init_attr, udata,
1081 get_sqp_num(to_mdev(pd->device), init_attr),
1082 &qp);
1083 if (err)
1084 return ERR_PTR(err);
1085
1086 qp->port = init_attr->port_num;
1087 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
1088
1089 break;
1090 }
1091 default:
1092 /* Don't support raw QPs */
1093 return ERR_PTR(-EINVAL);
1094 }
1095
1096 return &qp->ibqp;
1097 }
1098
1099 int mlx4_ib_destroy_qp(struct ib_qp *qp)
1100 {
1101 struct mlx4_ib_dev *dev = to_mdev(qp->device);
1102 struct mlx4_ib_qp *mqp = to_mqp(qp);
1103 struct mlx4_ib_pd *pd;
1104
1105 if (is_qp0(dev, mqp))
1106 mlx4_CLOSE_PORT(dev->dev, mqp->port);
1107
1108 pd = get_pd(mqp);
1109 destroy_qp_common(dev, mqp, !!pd->ibpd.uobject);
1110
1111 if (is_sqp(dev, mqp))
1112 kfree(to_msqp(mqp));
1113 else
1114 kfree(mqp);
1115
1116 return 0;
1117 }
1118
1119 static int to_mlx4_st(struct mlx4_ib_dev *dev, enum mlx4_ib_qp_type type)
1120 {
1121 switch (type) {
1122 case MLX4_IB_QPT_RC: return MLX4_QP_ST_RC;
1123 case MLX4_IB_QPT_UC: return MLX4_QP_ST_UC;
1124 case MLX4_IB_QPT_UD: return MLX4_QP_ST_UD;
1125 case MLX4_IB_QPT_XRC_INI:
1126 case MLX4_IB_QPT_XRC_TGT: return MLX4_QP_ST_XRC;
1127 case MLX4_IB_QPT_SMI:
1128 case MLX4_IB_QPT_GSI:
1129 case MLX4_IB_QPT_RAW_PACKET: return MLX4_QP_ST_MLX;
1130
1131 case MLX4_IB_QPT_PROXY_SMI_OWNER:
1132 case MLX4_IB_QPT_TUN_SMI_OWNER: return (mlx4_is_mfunc(dev->dev) ?
1133 MLX4_QP_ST_MLX : -1);
1134 case MLX4_IB_QPT_PROXY_SMI:
1135 case MLX4_IB_QPT_TUN_SMI:
1136 case MLX4_IB_QPT_PROXY_GSI:
1137 case MLX4_IB_QPT_TUN_GSI: return (mlx4_is_mfunc(dev->dev) ?
1138 MLX4_QP_ST_UD : -1);
1139 default: return -1;
1140 }
1141 }
1142
1143 static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, const struct ib_qp_attr *attr,
1144 int attr_mask)
1145 {
1146 u8 dest_rd_atomic;
1147 u32 access_flags;
1148 u32 hw_access_flags = 0;
1149
1150 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1151 dest_rd_atomic = attr->max_dest_rd_atomic;
1152 else
1153 dest_rd_atomic = qp->resp_depth;
1154
1155 if (attr_mask & IB_QP_ACCESS_FLAGS)
1156 access_flags = attr->qp_access_flags;
1157 else
1158 access_flags = qp->atomic_rd_en;
1159
1160 if (!dest_rd_atomic)
1161 access_flags &= IB_ACCESS_REMOTE_WRITE;
1162
1163 if (access_flags & IB_ACCESS_REMOTE_READ)
1164 hw_access_flags |= MLX4_QP_BIT_RRE;
1165 if (access_flags & IB_ACCESS_REMOTE_ATOMIC)
1166 hw_access_flags |= MLX4_QP_BIT_RAE;
1167 if (access_flags & IB_ACCESS_REMOTE_WRITE)
1168 hw_access_flags |= MLX4_QP_BIT_RWE;
1169
1170 return cpu_to_be32(hw_access_flags);
1171 }
1172
1173 static void store_sqp_attrs(struct mlx4_ib_sqp *sqp, const struct ib_qp_attr *attr,
1174 int attr_mask)
1175 {
1176 if (attr_mask & IB_QP_PKEY_INDEX)
1177 sqp->pkey_index = attr->pkey_index;
1178 if (attr_mask & IB_QP_QKEY)
1179 sqp->qkey = attr->qkey;
1180 if (attr_mask & IB_QP_SQ_PSN)
1181 sqp->send_psn = attr->sq_psn;
1182 }
1183
1184 static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port)
1185 {
1186 path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6);
1187 }
1188
1189 static int _mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah,
1190 u64 smac, u16 vlan_tag, struct mlx4_qp_path *path,
1191 u8 port)
1192 {
1193 int is_eth = rdma_port_get_link_layer(&dev->ib_dev, port) ==
1194 IB_LINK_LAYER_ETHERNET;
1195 int vidx;
1196 int smac_index;
1197
1198
1199 path->grh_mylmc = ah->src_path_bits & 0x7f;
1200 path->rlid = cpu_to_be16(ah->dlid);
1201 if (ah->static_rate) {
1202 path->static_rate = ah->static_rate + MLX4_STAT_RATE_OFFSET;
1203 while (path->static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
1204 !(1 << path->static_rate & dev->dev->caps.stat_rate_support))
1205 --path->static_rate;
1206 } else
1207 path->static_rate = 0;
1208
1209 if (ah->ah_flags & IB_AH_GRH) {
1210 if (ah->grh.sgid_index >= dev->dev->caps.gid_table_len[port]) {
1211 pr_err("sgid_index (%u) too large. max is %d\n",
1212 ah->grh.sgid_index, dev->dev->caps.gid_table_len[port] - 1);
1213 return -1;
1214 }
1215
1216 path->grh_mylmc |= 1 << 7;
1217 path->mgid_index = ah->grh.sgid_index;
1218 path->hop_limit = ah->grh.hop_limit;
1219 path->tclass_flowlabel =
1220 cpu_to_be32((ah->grh.traffic_class << 20) |
1221 (ah->grh.flow_label));
1222 memcpy(path->rgid, ah->grh.dgid.raw, 16);
1223 }
1224
1225 if (is_eth) {
1226 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
1227 ((port - 1) << 6) | ((ah->sl & 7) << 3);
1228
1229 if (!(ah->ah_flags & IB_AH_GRH))
1230 return -1;
1231
1232 memcpy(path->dmac, ah->dmac, ETH_ALEN);
1233 path->ackto = MLX4_IB_LINK_TYPE_ETH;
1234 /* find the index into MAC table for IBoE */
1235 if (!is_zero_ether_addr((const u8 *)&smac)) {
1236 if (mlx4_find_cached_mac(dev->dev, port, smac,
1237 &smac_index))
1238 return -ENOENT;
1239 } else {
1240 smac_index = 0;
1241 }
1242
1243 path->grh_mylmc &= 0x80 | smac_index;
1244
1245 path->feup |= MLX4_FEUP_FORCE_ETH_UP;
1246 if (vlan_tag < 0x1000) {
1247 if (mlx4_find_cached_vlan(dev->dev, port, vlan_tag, &vidx))
1248 return -ENOENT;
1249
1250 path->vlan_index = vidx;
1251 path->fl = 1 << 6;
1252 path->feup |= MLX4_FVL_FORCE_ETH_VLAN;
1253 }
1254 } else
1255 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
1256 ((port - 1) << 6) | ((ah->sl & 0xf) << 2);
1257
1258 return 0;
1259 }
1260
1261 static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_qp_attr *qp,
1262 enum ib_qp_attr_mask qp_attr_mask,
1263 struct mlx4_qp_path *path, u8 port)
1264 {
1265 return _mlx4_set_path(dev, &qp->ah_attr,
1266 mlx4_mac_to_u64((u8 *)qp->smac),
1267 (qp_attr_mask & IB_QP_VID) ? qp->vlan_id : 0xffff,
1268 path, port);
1269 }
1270
1271 static int mlx4_set_alt_path(struct mlx4_ib_dev *dev,
1272 const struct ib_qp_attr *qp,
1273 enum ib_qp_attr_mask qp_attr_mask,
1274 struct mlx4_qp_path *path, u8 port)
1275 {
1276 return _mlx4_set_path(dev, &qp->alt_ah_attr,
1277 mlx4_mac_to_u64((u8 *)qp->alt_smac),
1278 (qp_attr_mask & IB_QP_ALT_VID) ?
1279 qp->alt_vlan_id : 0xffff,
1280 path, port);
1281 }
1282
1283 static void update_mcg_macs(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
1284 {
1285 struct mlx4_ib_gid_entry *ge, *tmp;
1286
1287 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
1288 if (!ge->added && mlx4_ib_add_mc(dev, qp, &ge->gid)) {
1289 ge->added = 1;
1290 ge->port = qp->port;
1291 }
1292 }
1293 }
1294
1295 static int __mlx4_ib_modify_qp(struct ib_qp *ibqp,
1296 const struct ib_qp_attr *attr, int attr_mask,
1297 enum ib_qp_state cur_state, enum ib_qp_state new_state)
1298 {
1299 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
1300 struct mlx4_ib_qp *qp = to_mqp(ibqp);
1301 struct mlx4_ib_pd *pd;
1302 struct mlx4_ib_cq *send_cq, *recv_cq;
1303 struct mlx4_qp_context *context;
1304 enum mlx4_qp_optpar optpar = 0;
1305 int sqd_event;
1306 int steer_qp = 0;
1307 int err = -EINVAL;
1308
1309 context = kzalloc(sizeof *context, GFP_KERNEL);
1310 if (!context)
1311 return -ENOMEM;
1312
1313 context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) |
1314 (to_mlx4_st(dev, qp->mlx4_ib_qp_type) << 16));
1315
1316 if (!(attr_mask & IB_QP_PATH_MIG_STATE))
1317 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
1318 else {
1319 optpar |= MLX4_QP_OPTPAR_PM_STATE;
1320 switch (attr->path_mig_state) {
1321 case IB_MIG_MIGRATED:
1322 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
1323 break;
1324 case IB_MIG_REARM:
1325 context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11);
1326 break;
1327 case IB_MIG_ARMED:
1328 context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11);
1329 break;
1330 }
1331 }
1332
1333 if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI)
1334 context->mtu_msgmax = (IB_MTU_4096 << 5) | 11;
1335 else if (ibqp->qp_type == IB_QPT_RAW_PACKET)
1336 context->mtu_msgmax = (MLX4_RAW_QP_MTU << 5) | MLX4_RAW_QP_MSGMAX;
1337 else if (ibqp->qp_type == IB_QPT_UD) {
1338 if (qp->flags & MLX4_IB_QP_LSO)
1339 context->mtu_msgmax = (IB_MTU_4096 << 5) |
1340 ilog2(dev->dev->caps.max_gso_sz);
1341 else
1342 context->mtu_msgmax = (IB_MTU_4096 << 5) | 12;
1343 } else if (attr_mask & IB_QP_PATH_MTU) {
1344 if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) {
1345 pr_err("path MTU (%u) is invalid\n",
1346 attr->path_mtu);
1347 goto out;
1348 }
1349 context->mtu_msgmax = (attr->path_mtu << 5) |
1350 ilog2(dev->dev->caps.max_msg_sz);
1351 }
1352
1353 if (qp->rq.wqe_cnt)
1354 context->rq_size_stride = ilog2(qp->rq.wqe_cnt) << 3;
1355 context->rq_size_stride |= qp->rq.wqe_shift - 4;
1356
1357 if (qp->sq.wqe_cnt)
1358 context->sq_size_stride = ilog2(qp->sq.wqe_cnt) << 3;
1359 context->sq_size_stride |= qp->sq.wqe_shift - 4;
1360
1361 if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
1362 context->sq_size_stride |= !!qp->sq_no_prefetch << 7;
1363 context->xrcd = cpu_to_be32((u32) qp->xrcdn);
1364 if (ibqp->qp_type == IB_QPT_RAW_PACKET)
1365 context->param3 |= cpu_to_be32(1 << 30);
1366 }
1367
1368 if (qp->ibqp.uobject)
1369 context->usr_page = cpu_to_be32(to_mucontext(ibqp->uobject->context)->uar.index);
1370 else
1371 context->usr_page = cpu_to_be32(dev->priv_uar.index);
1372
1373 if (attr_mask & IB_QP_DEST_QPN)
1374 context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
1375
1376 if (attr_mask & IB_QP_PORT) {
1377 if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD &&
1378 !(attr_mask & IB_QP_AV)) {
1379 mlx4_set_sched(&context->pri_path, attr->port_num);
1380 optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE;
1381 }
1382 }
1383
1384 if (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) {
1385 if (dev->counters[qp->port - 1] != -1) {
1386 context->pri_path.counter_index =
1387 dev->counters[qp->port - 1];
1388 optpar |= MLX4_QP_OPTPAR_COUNTER_INDEX;
1389 } else
1390 context->pri_path.counter_index = 0xff;
1391
1392 if (qp->flags & MLX4_IB_QP_NETIF) {
1393 mlx4_ib_steer_qp_reg(dev, qp, 1);
1394 steer_qp = 1;
1395 }
1396 }
1397
1398 if (attr_mask & IB_QP_PKEY_INDEX) {
1399 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1400 context->pri_path.disable_pkey_check = 0x40;
1401 context->pri_path.pkey_index = attr->pkey_index;
1402 optpar |= MLX4_QP_OPTPAR_PKEY_INDEX;
1403 }
1404
1405 if (attr_mask & IB_QP_AV) {
1406 if (mlx4_set_path(dev, attr, attr_mask, &context->pri_path,
1407 attr_mask & IB_QP_PORT ?
1408 attr->port_num : qp->port))
1409 goto out;
1410
1411 optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH |
1412 MLX4_QP_OPTPAR_SCHED_QUEUE);
1413 }
1414
1415 if (attr_mask & IB_QP_TIMEOUT) {
1416 context->pri_path.ackto |= attr->timeout << 3;
1417 optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT;
1418 }
1419
1420 if (attr_mask & IB_QP_ALT_PATH) {
1421 if (attr->alt_port_num == 0 ||
1422 attr->alt_port_num > dev->dev->caps.num_ports)
1423 goto out;
1424
1425 if (attr->alt_pkey_index >=
1426 dev->dev->caps.pkey_table_len[attr->alt_port_num])
1427 goto out;
1428
1429 if (mlx4_set_alt_path(dev, attr, attr_mask, &context->alt_path,
1430 attr->alt_port_num))
1431 goto out;
1432
1433 context->alt_path.pkey_index = attr->alt_pkey_index;
1434 context->alt_path.ackto = attr->alt_timeout << 3;
1435 optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH;
1436 }
1437
1438 pd = get_pd(qp);
1439 get_cqs(qp, &send_cq, &recv_cq);
1440 context->pd = cpu_to_be32(pd->pdn);
1441 context->cqn_send = cpu_to_be32(send_cq->mcq.cqn);
1442 context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn);
1443 context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28);
1444
1445 /* Set "fast registration enabled" for all kernel QPs */
1446 if (!qp->ibqp.uobject)
1447 context->params1 |= cpu_to_be32(1 << 11);
1448
1449 if (attr_mask & IB_QP_RNR_RETRY) {
1450 context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
1451 optpar |= MLX4_QP_OPTPAR_RNR_RETRY;
1452 }
1453
1454 if (attr_mask & IB_QP_RETRY_CNT) {
1455 context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
1456 optpar |= MLX4_QP_OPTPAR_RETRY_COUNT;
1457 }
1458
1459 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1460 if (attr->max_rd_atomic)
1461 context->params1 |=
1462 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
1463 optpar |= MLX4_QP_OPTPAR_SRA_MAX;
1464 }
1465
1466 if (attr_mask & IB_QP_SQ_PSN)
1467 context->next_send_psn = cpu_to_be32(attr->sq_psn);
1468
1469 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1470 if (attr->max_dest_rd_atomic)
1471 context->params2 |=
1472 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
1473 optpar |= MLX4_QP_OPTPAR_RRA_MAX;
1474 }
1475
1476 if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) {
1477 context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask);
1478 optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE;
1479 }
1480
1481 if (ibqp->srq)
1482 context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC);
1483
1484 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
1485 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
1486 optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT;
1487 }
1488 if (attr_mask & IB_QP_RQ_PSN)
1489 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
1490
1491 /* proxy and tunnel qp qkeys will be changed in modify-qp wrappers */
1492 if (attr_mask & IB_QP_QKEY) {
1493 if (qp->mlx4_ib_qp_type &
1494 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))
1495 context->qkey = cpu_to_be32(IB_QP_SET_QKEY);
1496 else {
1497 if (mlx4_is_mfunc(dev->dev) &&
1498 !(qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) &&
1499 (attr->qkey & MLX4_RESERVED_QKEY_MASK) ==
1500 MLX4_RESERVED_QKEY_BASE) {
1501 pr_err("Cannot use reserved QKEY"
1502 " 0x%x (range 0xffff0000..0xffffffff"
1503 " is reserved)\n", attr->qkey);
1504 err = -EINVAL;
1505 goto out;
1506 }
1507 context->qkey = cpu_to_be32(attr->qkey);
1508 }
1509 optpar |= MLX4_QP_OPTPAR_Q_KEY;
1510 }
1511
1512 if (ibqp->srq)
1513 context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn);
1514
1515 if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1516 context->db_rec_addr = cpu_to_be64(qp->db.dma);
1517
1518 if (cur_state == IB_QPS_INIT &&
1519 new_state == IB_QPS_RTR &&
1520 (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
1521 ibqp->qp_type == IB_QPT_UD ||
1522 ibqp->qp_type == IB_QPT_RAW_PACKET)) {
1523 context->pri_path.sched_queue = (qp->port - 1) << 6;
1524 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
1525 qp->mlx4_ib_qp_type &
1526 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) {
1527 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE;
1528 if (qp->mlx4_ib_qp_type != MLX4_IB_QPT_SMI)
1529 context->pri_path.fl = 0x80;
1530 } else {
1531 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1532 context->pri_path.fl = 0x80;
1533 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE;
1534 }
1535 }
1536
1537 if (qp->ibqp.qp_type == IB_QPT_RAW_PACKET)
1538 context->pri_path.ackto = (context->pri_path.ackto & 0xf8) |
1539 MLX4_IB_LINK_TYPE_ETH;
1540
1541 if (ibqp->qp_type == IB_QPT_UD && (new_state == IB_QPS_RTR)) {
1542 int is_eth = rdma_port_get_link_layer(
1543 &dev->ib_dev, qp->port) ==
1544 IB_LINK_LAYER_ETHERNET;
1545 if (is_eth) {
1546 context->pri_path.ackto = MLX4_IB_LINK_TYPE_ETH;
1547 optpar |= MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH;
1548 }
1549 }
1550
1551
1552 if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD &&
1553 attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
1554 sqd_event = 1;
1555 else
1556 sqd_event = 0;
1557
1558 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1559 context->rlkey |= (1 << 4);
1560
1561 /*
1562 * Before passing a kernel QP to the HW, make sure that the
1563 * ownership bits of the send queue are set and the SQ
1564 * headroom is stamped so that the hardware doesn't start
1565 * processing stale work requests.
1566 */
1567 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
1568 struct mlx4_wqe_ctrl_seg *ctrl;
1569 int i;
1570
1571 for (i = 0; i < qp->sq.wqe_cnt; ++i) {
1572 ctrl = get_send_wqe(qp, i);
1573 ctrl->owner_opcode = cpu_to_be32(1 << 31);
1574 if (qp->sq_max_wqes_per_wr == 1)
1575 ctrl->fence_size = 1 << (qp->sq.wqe_shift - 4);
1576
1577 stamp_send_wqe(qp, i, 1 << qp->sq.wqe_shift);
1578 }
1579 }
1580
1581 err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state),
1582 to_mlx4_state(new_state), context, optpar,
1583 sqd_event, &qp->mqp);
1584 if (err)
1585 goto out;
1586
1587 qp->state = new_state;
1588
1589 if (attr_mask & IB_QP_ACCESS_FLAGS)
1590 qp->atomic_rd_en = attr->qp_access_flags;
1591 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1592 qp->resp_depth = attr->max_dest_rd_atomic;
1593 if (attr_mask & IB_QP_PORT) {
1594 qp->port = attr->port_num;
1595 update_mcg_macs(dev, qp);
1596 }
1597 if (attr_mask & IB_QP_ALT_PATH)
1598 qp->alt_port = attr->alt_port_num;
1599
1600 if (is_sqp(dev, qp))
1601 store_sqp_attrs(to_msqp(qp), attr, attr_mask);
1602
1603 /*
1604 * If we moved QP0 to RTR, bring the IB link up; if we moved
1605 * QP0 to RESET or ERROR, bring the link back down.
1606 */
1607 if (is_qp0(dev, qp)) {
1608 if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR)
1609 if (mlx4_INIT_PORT(dev->dev, qp->port))
1610 pr_warn("INIT_PORT failed for port %d\n",
1611 qp->port);
1612
1613 if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR &&
1614 (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR))
1615 mlx4_CLOSE_PORT(dev->dev, qp->port);
1616 }
1617
1618 /*
1619 * If we moved a kernel QP to RESET, clean up all old CQ
1620 * entries and reinitialize the QP.
1621 */
1622 if (new_state == IB_QPS_RESET && !ibqp->uobject) {
1623 mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
1624 ibqp->srq ? to_msrq(ibqp->srq): NULL);
1625 if (send_cq != recv_cq)
1626 mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1627
1628 qp->rq.head = 0;
1629 qp->rq.tail = 0;
1630 qp->sq.head = 0;
1631 qp->sq.tail = 0;
1632 qp->sq_next_wqe = 0;
1633 if (qp->rq.wqe_cnt)
1634 *qp->db.db = 0;
1635
1636 if (qp->flags & MLX4_IB_QP_NETIF)
1637 mlx4_ib_steer_qp_reg(dev, qp, 0);
1638 }
1639
1640 out:
1641 if (err && steer_qp)
1642 mlx4_ib_steer_qp_reg(dev, qp, 0);
1643 kfree(context);
1644 return err;
1645 }
1646
1647 int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1648 int attr_mask, struct ib_udata *udata)
1649 {
1650 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
1651 struct mlx4_ib_qp *qp = to_mqp(ibqp);
1652 enum ib_qp_state cur_state, new_state;
1653 int err = -EINVAL;
1654 int ll;
1655 mutex_lock(&qp->mutex);
1656
1657 cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
1658 new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
1659
1660 if (cur_state == new_state && cur_state == IB_QPS_RESET) {
1661 ll = IB_LINK_LAYER_UNSPECIFIED;
1662 } else {
1663 int port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1664 ll = rdma_port_get_link_layer(&dev->ib_dev, port);
1665 }
1666
1667 if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
1668 attr_mask, ll)) {
1669 pr_debug("qpn 0x%x: invalid attribute mask specified "
1670 "for transition %d to %d. qp_type %d,"
1671 " attr_mask 0x%x\n",
1672 ibqp->qp_num, cur_state, new_state,
1673 ibqp->qp_type, attr_mask);
1674 goto out;
1675 }
1676
1677 if ((attr_mask & IB_QP_PORT) &&
1678 (attr->port_num == 0 || attr->port_num > dev->num_ports)) {
1679 pr_debug("qpn 0x%x: invalid port number (%d) specified "
1680 "for transition %d to %d. qp_type %d\n",
1681 ibqp->qp_num, attr->port_num, cur_state,
1682 new_state, ibqp->qp_type);
1683 goto out;
1684 }
1685
1686 if ((attr_mask & IB_QP_PORT) && (ibqp->qp_type == IB_QPT_RAW_PACKET) &&
1687 (rdma_port_get_link_layer(&dev->ib_dev, attr->port_num) !=
1688 IB_LINK_LAYER_ETHERNET))
1689 goto out;
1690
1691 if (attr_mask & IB_QP_PKEY_INDEX) {
1692 int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1693 if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) {
1694 pr_debug("qpn 0x%x: invalid pkey index (%d) specified "
1695 "for transition %d to %d. qp_type %d\n",
1696 ibqp->qp_num, attr->pkey_index, cur_state,
1697 new_state, ibqp->qp_type);
1698 goto out;
1699 }
1700 }
1701
1702 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
1703 attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) {
1704 pr_debug("qpn 0x%x: max_rd_atomic (%d) too large. "
1705 "Transition %d to %d. qp_type %d\n",
1706 ibqp->qp_num, attr->max_rd_atomic, cur_state,
1707 new_state, ibqp->qp_type);
1708 goto out;
1709 }
1710
1711 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
1712 attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) {
1713 pr_debug("qpn 0x%x: max_dest_rd_atomic (%d) too large. "
1714 "Transition %d to %d. qp_type %d\n",
1715 ibqp->qp_num, attr->max_dest_rd_atomic, cur_state,
1716 new_state, ibqp->qp_type);
1717 goto out;
1718 }
1719
1720 if (cur_state == new_state && cur_state == IB_QPS_RESET) {
1721 err = 0;
1722 goto out;
1723 }
1724
1725 err = __mlx4_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state);
1726
1727 out:
1728 mutex_unlock(&qp->mutex);
1729 return err;
1730 }
1731
1732 static int build_sriov_qp0_header(struct mlx4_ib_sqp *sqp,
1733 struct ib_send_wr *wr,
1734 void *wqe, unsigned *mlx_seg_len)
1735 {
1736 struct mlx4_ib_dev *mdev = to_mdev(sqp->qp.ibqp.device);
1737 struct ib_device *ib_dev = &mdev->ib_dev;
1738 struct mlx4_wqe_mlx_seg *mlx = wqe;
1739 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
1740 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
1741 u16 pkey;
1742 u32 qkey;
1743 int send_size;
1744 int header_size;
1745 int spc;
1746 int i;
1747
1748 if (wr->opcode != IB_WR_SEND)
1749 return -EINVAL;
1750
1751 send_size = 0;
1752
1753 for (i = 0; i < wr->num_sge; ++i)
1754 send_size += wr->sg_list[i].length;
1755
1756 /* for proxy-qp0 sends, need to add in size of tunnel header */
1757 /* for tunnel-qp0 sends, tunnel header is already in s/g list */
1758 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER)
1759 send_size += sizeof (struct mlx4_ib_tunnel_header);
1760
1761 ib_ud_header_init(send_size, 1, 0, 0, 0, 0, &sqp->ud_header);
1762
1763 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) {
1764 sqp->ud_header.lrh.service_level =
1765 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
1766 sqp->ud_header.lrh.destination_lid =
1767 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
1768 sqp->ud_header.lrh.source_lid =
1769 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
1770 }
1771
1772 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
1773
1774 /* force loopback */
1775 mlx->flags |= cpu_to_be32(MLX4_WQE_MLX_VL15 | 0x1 | MLX4_WQE_MLX_SLR);
1776 mlx->rlid = sqp->ud_header.lrh.destination_lid;
1777
1778 sqp->ud_header.lrh.virtual_lane = 0;
1779 sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
1780 ib_get_cached_pkey(ib_dev, sqp->qp.port, 0, &pkey);
1781 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
1782 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_TUN_SMI_OWNER)
1783 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
1784 else
1785 sqp->ud_header.bth.destination_qpn =
1786 cpu_to_be32(mdev->dev->caps.qp0_tunnel[sqp->qp.port - 1]);
1787
1788 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
1789 if (mlx4_get_parav_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
1790 return -EINVAL;
1791 sqp->ud_header.deth.qkey = cpu_to_be32(qkey);
1792 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.mqp.qpn);
1793
1794 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
1795 sqp->ud_header.immediate_present = 0;
1796
1797 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
1798
1799 /*
1800 * Inline data segments may not cross a 64 byte boundary. If
1801 * our UD header is bigger than the space available up to the
1802 * next 64 byte boundary in the WQE, use two inline data
1803 * segments to hold the UD header.
1804 */
1805 spc = MLX4_INLINE_ALIGN -
1806 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
1807 if (header_size <= spc) {
1808 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
1809 memcpy(inl + 1, sqp->header_buf, header_size);
1810 i = 1;
1811 } else {
1812 inl->byte_count = cpu_to_be32(1 << 31 | spc);
1813 memcpy(inl + 1, sqp->header_buf, spc);
1814
1815 inl = (void *) (inl + 1) + spc;
1816 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
1817 /*
1818 * Need a barrier here to make sure all the data is
1819 * visible before the byte_count field is set.
1820 * Otherwise the HCA prefetcher could grab the 64-byte
1821 * chunk with this inline segment and get a valid (!=
1822 * 0xffffffff) byte count but stale data, and end up
1823 * generating a packet with bad headers.
1824 *
1825 * The first inline segment's byte_count field doesn't
1826 * need a barrier, because it comes after a
1827 * control/MLX segment and therefore is at an offset
1828 * of 16 mod 64.
1829 */
1830 wmb();
1831 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
1832 i = 2;
1833 }
1834
1835 *mlx_seg_len =
1836 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
1837 return 0;
1838 }
1839
1840 static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
1841 void *wqe, unsigned *mlx_seg_len)
1842 {
1843 struct ib_device *ib_dev = sqp->qp.ibqp.device;
1844 struct mlx4_wqe_mlx_seg *mlx = wqe;
1845 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
1846 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
1847 struct net_device *ndev;
1848 union ib_gid sgid;
1849 u16 pkey;
1850 int send_size;
1851 int header_size;
1852 int spc;
1853 int i;
1854 int err = 0;
1855 u16 vlan = 0xffff;
1856 bool is_eth;
1857 bool is_vlan = false;
1858 bool is_grh;
1859
1860 send_size = 0;
1861 for (i = 0; i < wr->num_sge; ++i)
1862 send_size += wr->sg_list[i].length;
1863
1864 is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET;
1865 is_grh = mlx4_ib_ah_grh_present(ah);
1866 if (is_eth) {
1867 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
1868 /* When multi-function is enabled, the ib_core gid
1869 * indexes don't necessarily match the hw ones, so
1870 * we must use our own cache */
1871 sgid.global.subnet_prefix =
1872 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
1873 subnet_prefix;
1874 sgid.global.interface_id =
1875 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
1876 guid_cache[ah->av.ib.gid_index];
1877 } else {
1878 err = ib_get_cached_gid(ib_dev,
1879 be32_to_cpu(ah->av.ib.port_pd) >> 24,
1880 ah->av.ib.gid_index, &sgid);
1881 if (err)
1882 return err;
1883 }
1884
1885 if (ah->av.eth.vlan != 0xffff) {
1886 vlan = be16_to_cpu(ah->av.eth.vlan) & 0x0fff;
1887 is_vlan = 1;
1888 }
1889 }
1890 ib_ud_header_init(send_size, !is_eth, is_eth, is_vlan, is_grh, 0, &sqp->ud_header);
1891
1892 if (!is_eth) {
1893 sqp->ud_header.lrh.service_level =
1894 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
1895 sqp->ud_header.lrh.destination_lid = ah->av.ib.dlid;
1896 sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f);
1897 }
1898
1899 if (is_grh) {
1900 sqp->ud_header.grh.traffic_class =
1901 (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff;
1902 sqp->ud_header.grh.flow_label =
1903 ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
1904 sqp->ud_header.grh.hop_limit = ah->av.ib.hop_limit;
1905 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
1906 /* When multi-function is enabled, the ib_core gid
1907 * indexes don't necessarily match the hw ones, so
1908 * we must use our own cache */
1909 sqp->ud_header.grh.source_gid.global.subnet_prefix =
1910 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
1911 subnet_prefix;
1912 sqp->ud_header.grh.source_gid.global.interface_id =
1913 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
1914 guid_cache[ah->av.ib.gid_index];
1915 } else
1916 ib_get_cached_gid(ib_dev,
1917 be32_to_cpu(ah->av.ib.port_pd) >> 24,
1918 ah->av.ib.gid_index,
1919 &sqp->ud_header.grh.source_gid);
1920 memcpy(sqp->ud_header.grh.destination_gid.raw,
1921 ah->av.ib.dgid, 16);
1922 }
1923
1924 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
1925
1926 if (!is_eth) {
1927 mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) |
1928 (sqp->ud_header.lrh.destination_lid ==
1929 IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) |
1930 (sqp->ud_header.lrh.service_level << 8));
1931 if (ah->av.ib.port_pd & cpu_to_be32(0x80000000))
1932 mlx->flags |= cpu_to_be32(0x1); /* force loopback */
1933 mlx->rlid = sqp->ud_header.lrh.destination_lid;
1934 }
1935
1936 switch (wr->opcode) {
1937 case IB_WR_SEND:
1938 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
1939 sqp->ud_header.immediate_present = 0;
1940 break;
1941 case IB_WR_SEND_WITH_IMM:
1942 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
1943 sqp->ud_header.immediate_present = 1;
1944 sqp->ud_header.immediate_data = wr->ex.imm_data;
1945 break;
1946 default:
1947 return -EINVAL;
1948 }
1949
1950 if (is_eth) {
1951 u8 *smac;
1952 u16 pcp = (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 29) << 13;
1953
1954 mlx->sched_prio = cpu_to_be16(pcp);
1955
1956 memcpy(sqp->ud_header.eth.dmac_h, ah->av.eth.mac, 6);
1957 /* FIXME: cache smac value? */
1958 ndev = to_mdev(sqp->qp.ibqp.device)->iboe.netdevs[sqp->qp.port - 1];
1959 if (!ndev)
1960 return -ENODEV;
1961 smac = ndev->dev_addr;
1962 memcpy(sqp->ud_header.eth.smac_h, smac, 6);
1963 if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6))
1964 mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
1965 if (!is_vlan) {
1966 sqp->ud_header.eth.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
1967 } else {
1968 sqp->ud_header.vlan.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
1969 sqp->ud_header.vlan.tag = cpu_to_be16(vlan | pcp);
1970 }
1971 } else {
1972 sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0;
1973 if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
1974 sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
1975 }
1976 sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
1977 if (!sqp->qp.ibqp.qp_num)
1978 ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey);
1979 else
1980 ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey);
1981 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
1982 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
1983 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
1984 sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
1985 sqp->qkey : wr->wr.ud.remote_qkey);
1986 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
1987
1988 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
1989
1990 if (0) {
1991 pr_err("built UD header of size %d:\n", header_size);
1992 for (i = 0; i < header_size / 4; ++i) {
1993 if (i % 8 == 0)
1994 pr_err(" [%02x] ", i * 4);
1995 pr_cont(" %08x",
1996 be32_to_cpu(((__be32 *) sqp->header_buf)[i]));
1997 if ((i + 1) % 8 == 0)
1998 pr_cont("\n");
1999 }
2000 pr_err("\n");
2001 }
2002
2003 /*
2004 * Inline data segments may not cross a 64 byte boundary. If
2005 * our UD header is bigger than the space available up to the
2006 * next 64 byte boundary in the WQE, use two inline data
2007 * segments to hold the UD header.
2008 */
2009 spc = MLX4_INLINE_ALIGN -
2010 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2011 if (header_size <= spc) {
2012 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
2013 memcpy(inl + 1, sqp->header_buf, header_size);
2014 i = 1;
2015 } else {
2016 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2017 memcpy(inl + 1, sqp->header_buf, spc);
2018
2019 inl = (void *) (inl + 1) + spc;
2020 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
2021 /*
2022 * Need a barrier here to make sure all the data is
2023 * visible before the byte_count field is set.
2024 * Otherwise the HCA prefetcher could grab the 64-byte
2025 * chunk with this inline segment and get a valid (!=
2026 * 0xffffffff) byte count but stale data, and end up
2027 * generating a packet with bad headers.
2028 *
2029 * The first inline segment's byte_count field doesn't
2030 * need a barrier, because it comes after a
2031 * control/MLX segment and therefore is at an offset
2032 * of 16 mod 64.
2033 */
2034 wmb();
2035 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
2036 i = 2;
2037 }
2038
2039 *mlx_seg_len =
2040 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
2041 return 0;
2042 }
2043
2044 static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
2045 {
2046 unsigned cur;
2047 struct mlx4_ib_cq *cq;
2048
2049 cur = wq->head - wq->tail;
2050 if (likely(cur + nreq < wq->max_post))
2051 return 0;
2052
2053 cq = to_mcq(ib_cq);
2054 spin_lock(&cq->lock);
2055 cur = wq->head - wq->tail;
2056 spin_unlock(&cq->lock);
2057
2058 return cur + nreq >= wq->max_post;
2059 }
2060
2061 static __be32 convert_access(int acc)
2062 {
2063 return (acc & IB_ACCESS_REMOTE_ATOMIC ?
2064 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC) : 0) |
2065 (acc & IB_ACCESS_REMOTE_WRITE ?
2066 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE) : 0) |
2067 (acc & IB_ACCESS_REMOTE_READ ?
2068 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ) : 0) |
2069 (acc & IB_ACCESS_LOCAL_WRITE ? cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_WRITE) : 0) |
2070 cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_READ);
2071 }
2072
2073 static void set_fmr_seg(struct mlx4_wqe_fmr_seg *fseg, struct ib_send_wr *wr)
2074 {
2075 struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(wr->wr.fast_reg.page_list);
2076 int i;
2077
2078 for (i = 0; i < wr->wr.fast_reg.page_list_len; ++i)
2079 mfrpl->mapped_page_list[i] =
2080 cpu_to_be64(wr->wr.fast_reg.page_list->page_list[i] |
2081 MLX4_MTT_FLAG_PRESENT);
2082
2083 fseg->flags = convert_access(wr->wr.fast_reg.access_flags);
2084 fseg->mem_key = cpu_to_be32(wr->wr.fast_reg.rkey);
2085 fseg->buf_list = cpu_to_be64(mfrpl->map);
2086 fseg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start);
2087 fseg->reg_len = cpu_to_be64(wr->wr.fast_reg.length);
2088 fseg->offset = 0; /* XXX -- is this just for ZBVA? */
2089 fseg->page_size = cpu_to_be32(wr->wr.fast_reg.page_shift);
2090 fseg->reserved[0] = 0;
2091 fseg->reserved[1] = 0;
2092 }
2093
2094 static void set_bind_seg(struct mlx4_wqe_bind_seg *bseg, struct ib_send_wr *wr)
2095 {
2096 bseg->flags1 =
2097 convert_access(wr->wr.bind_mw.bind_info.mw_access_flags) &
2098 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ |
2099 MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE |
2100 MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC);
2101 bseg->flags2 = 0;
2102 if (wr->wr.bind_mw.mw->type == IB_MW_TYPE_2)
2103 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_TYPE_2);
2104 if (wr->wr.bind_mw.bind_info.mw_access_flags & IB_ZERO_BASED)
2105 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_ZERO_BASED);
2106 bseg->new_rkey = cpu_to_be32(wr->wr.bind_mw.rkey);
2107 bseg->lkey = cpu_to_be32(wr->wr.bind_mw.bind_info.mr->lkey);
2108 bseg->addr = cpu_to_be64(wr->wr.bind_mw.bind_info.addr);
2109 bseg->length = cpu_to_be64(wr->wr.bind_mw.bind_info.length);
2110 }
2111
2112 static void set_local_inv_seg(struct mlx4_wqe_local_inval_seg *iseg, u32 rkey)
2113 {
2114 memset(iseg, 0, sizeof(*iseg));
2115 iseg->mem_key = cpu_to_be32(rkey);
2116 }
2117
2118 static __always_inline void set_raddr_seg(struct mlx4_wqe_raddr_seg *rseg,
2119 u64 remote_addr, u32 rkey)
2120 {
2121 rseg->raddr = cpu_to_be64(remote_addr);
2122 rseg->rkey = cpu_to_be32(rkey);
2123 rseg->reserved = 0;
2124 }
2125
2126 static void set_atomic_seg(struct mlx4_wqe_atomic_seg *aseg, struct ib_send_wr *wr)
2127 {
2128 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
2129 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
2130 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
2131 } else if (wr->opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) {
2132 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2133 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2134 } else {
2135 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2136 aseg->compare = 0;
2137 }
2138
2139 }
2140
2141 static void set_masked_atomic_seg(struct mlx4_wqe_masked_atomic_seg *aseg,
2142 struct ib_send_wr *wr)
2143 {
2144 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
2145 aseg->swap_add_mask = cpu_to_be64(wr->wr.atomic.swap_mask);
2146 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
2147 aseg->compare_mask = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2148 }
2149
2150 static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg,
2151 struct ib_send_wr *wr)
2152 {
2153 memcpy(dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av));
2154 dseg->dqpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2155 dseg->qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2156 dseg->vlan = to_mah(wr->wr.ud.ah)->av.eth.vlan;
2157 memcpy(dseg->mac, to_mah(wr->wr.ud.ah)->av.eth.mac, 6);
2158 }
2159
2160 static void set_tunnel_datagram_seg(struct mlx4_ib_dev *dev,
2161 struct mlx4_wqe_datagram_seg *dseg,
2162 struct ib_send_wr *wr, enum ib_qp_type qpt)
2163 {
2164 union mlx4_ext_av *av = &to_mah(wr->wr.ud.ah)->av;
2165 struct mlx4_av sqp_av = {0};
2166 int port = *((u8 *) &av->ib.port_pd) & 0x3;
2167
2168 /* force loopback */
2169 sqp_av.port_pd = av->ib.port_pd | cpu_to_be32(0x80000000);
2170 sqp_av.g_slid = av->ib.g_slid & 0x7f; /* no GRH */
2171 sqp_av.sl_tclass_flowlabel = av->ib.sl_tclass_flowlabel &
2172 cpu_to_be32(0xf0000000);
2173
2174 memcpy(dseg->av, &sqp_av, sizeof (struct mlx4_av));
2175 /* This function used only for sending on QP1 proxies */
2176 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp1_tunnel[port - 1]);
2177 /* Use QKEY from the QP context, which is set by master */
2178 dseg->qkey = cpu_to_be32(IB_QP_SET_QKEY);
2179 }
2180
2181 static void build_tunnel_header(struct ib_send_wr *wr, void *wqe, unsigned *mlx_seg_len)
2182 {
2183 struct mlx4_wqe_inline_seg *inl = wqe;
2184 struct mlx4_ib_tunnel_header hdr;
2185 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2186 int spc;
2187 int i;
2188
2189 memcpy(&hdr.av, &ah->av, sizeof hdr.av);
2190 hdr.remote_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2191 hdr.pkey_index = cpu_to_be16(wr->wr.ud.pkey_index);
2192 hdr.qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2193
2194 spc = MLX4_INLINE_ALIGN -
2195 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2196 if (sizeof (hdr) <= spc) {
2197 memcpy(inl + 1, &hdr, sizeof (hdr));
2198 wmb();
2199 inl->byte_count = cpu_to_be32(1 << 31 | sizeof (hdr));
2200 i = 1;
2201 } else {
2202 memcpy(inl + 1, &hdr, spc);
2203 wmb();
2204 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2205
2206 inl = (void *) (inl + 1) + spc;
2207 memcpy(inl + 1, (void *) &hdr + spc, sizeof (hdr) - spc);
2208 wmb();
2209 inl->byte_count = cpu_to_be32(1 << 31 | (sizeof (hdr) - spc));
2210 i = 2;
2211 }
2212
2213 *mlx_seg_len =
2214 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + sizeof (hdr), 16);
2215 }
2216
2217 static void set_mlx_icrc_seg(void *dseg)
2218 {
2219 u32 *t = dseg;
2220 struct mlx4_wqe_inline_seg *iseg = dseg;
2221
2222 t[1] = 0;
2223
2224 /*
2225 * Need a barrier here before writing the byte_count field to
2226 * make sure that all the data is visible before the
2227 * byte_count field is set. Otherwise, if the segment begins
2228 * a new cacheline, the HCA prefetcher could grab the 64-byte
2229 * chunk and get a valid (!= * 0xffffffff) byte count but
2230 * stale data, and end up sending the wrong data.
2231 */
2232 wmb();
2233
2234 iseg->byte_count = cpu_to_be32((1 << 31) | 4);
2235 }
2236
2237 static void set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2238 {
2239 dseg->lkey = cpu_to_be32(sg->lkey);
2240 dseg->addr = cpu_to_be64(sg->addr);
2241
2242 /*
2243 * Need a barrier here before writing the byte_count field to
2244 * make sure that all the data is visible before the
2245 * byte_count field is set. Otherwise, if the segment begins
2246 * a new cacheline, the HCA prefetcher could grab the 64-byte
2247 * chunk and get a valid (!= * 0xffffffff) byte count but
2248 * stale data, and end up sending the wrong data.
2249 */
2250 wmb();
2251
2252 dseg->byte_count = cpu_to_be32(sg->length);
2253 }
2254
2255 static void __set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2256 {
2257 dseg->byte_count = cpu_to_be32(sg->length);
2258 dseg->lkey = cpu_to_be32(sg->lkey);
2259 dseg->addr = cpu_to_be64(sg->addr);
2260 }
2261
2262 static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe, struct ib_send_wr *wr,
2263 struct mlx4_ib_qp *qp, unsigned *lso_seg_len,
2264 __be32 *lso_hdr_sz, __be32 *blh)
2265 {
2266 unsigned halign = ALIGN(sizeof *wqe + wr->wr.ud.hlen, 16);
2267
2268 if (unlikely(halign > MLX4_IB_CACHE_LINE_SIZE))
2269 *blh = cpu_to_be32(1 << 6);
2270
2271 if (unlikely(!(qp->flags & MLX4_IB_QP_LSO) &&
2272 wr->num_sge > qp->sq.max_gs - (halign >> 4)))
2273 return -EINVAL;
2274
2275 memcpy(wqe->header, wr->wr.ud.header, wr->wr.ud.hlen);
2276
2277 *lso_hdr_sz = cpu_to_be32((wr->wr.ud.mss - wr->wr.ud.hlen) << 16 |
2278 wr->wr.ud.hlen);
2279 *lso_seg_len = halign;
2280 return 0;
2281 }
2282
2283 static __be32 send_ieth(struct ib_send_wr *wr)
2284 {
2285 switch (wr->opcode) {
2286 case IB_WR_SEND_WITH_IMM:
2287 case IB_WR_RDMA_WRITE_WITH_IMM:
2288 return wr->ex.imm_data;
2289
2290 case IB_WR_SEND_WITH_INV:
2291 return cpu_to_be32(wr->ex.invalidate_rkey);
2292
2293 default:
2294 return 0;
2295 }
2296 }
2297
2298 static void add_zero_len_inline(void *wqe)
2299 {
2300 struct mlx4_wqe_inline_seg *inl = wqe;
2301 memset(wqe, 0, 16);
2302 inl->byte_count = cpu_to_be32(1 << 31);
2303 }
2304
2305 int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
2306 struct ib_send_wr **bad_wr)
2307 {
2308 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2309 void *wqe;
2310 struct mlx4_wqe_ctrl_seg *ctrl;
2311 struct mlx4_wqe_data_seg *dseg;
2312 unsigned long flags;
2313 int nreq;
2314 int err = 0;
2315 unsigned ind;
2316 int uninitialized_var(stamp);
2317 int uninitialized_var(size);
2318 unsigned uninitialized_var(seglen);
2319 __be32 dummy;
2320 __be32 *lso_wqe;
2321 __be32 uninitialized_var(lso_hdr_sz);
2322 __be32 blh;
2323 int i;
2324
2325 spin_lock_irqsave(&qp->sq.lock, flags);
2326
2327 ind = qp->sq_next_wqe;
2328
2329 for (nreq = 0; wr; ++nreq, wr = wr->next) {
2330 lso_wqe = &dummy;
2331 blh = 0;
2332
2333 if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
2334 err = -ENOMEM;
2335 *bad_wr = wr;
2336 goto out;
2337 }
2338
2339 if (unlikely(wr->num_sge > qp->sq.max_gs)) {
2340 err = -EINVAL;
2341 *bad_wr = wr;
2342 goto out;
2343 }
2344
2345 ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
2346 qp->sq.wrid[(qp->sq.head + nreq) & (qp->sq.wqe_cnt - 1)] = wr->wr_id;
2347
2348 ctrl->srcrb_flags =
2349 (wr->send_flags & IB_SEND_SIGNALED ?
2350 cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) |
2351 (wr->send_flags & IB_SEND_SOLICITED ?
2352 cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) |
2353 ((wr->send_flags & IB_SEND_IP_CSUM) ?
2354 cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
2355 MLX4_WQE_CTRL_TCP_UDP_CSUM) : 0) |
2356 qp->sq_signal_bits;
2357
2358 ctrl->imm = send_ieth(wr);
2359
2360 wqe += sizeof *ctrl;
2361 size = sizeof *ctrl / 16;
2362
2363 switch (qp->mlx4_ib_qp_type) {
2364 case MLX4_IB_QPT_RC:
2365 case MLX4_IB_QPT_UC:
2366 switch (wr->opcode) {
2367 case IB_WR_ATOMIC_CMP_AND_SWP:
2368 case IB_WR_ATOMIC_FETCH_AND_ADD:
2369 case IB_WR_MASKED_ATOMIC_FETCH_AND_ADD:
2370 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2371 wr->wr.atomic.rkey);
2372 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2373
2374 set_atomic_seg(wqe, wr);
2375 wqe += sizeof (struct mlx4_wqe_atomic_seg);
2376
2377 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2378 sizeof (struct mlx4_wqe_atomic_seg)) / 16;
2379
2380 break;
2381
2382 case IB_WR_MASKED_ATOMIC_CMP_AND_SWP:
2383 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2384 wr->wr.atomic.rkey);
2385 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2386
2387 set_masked_atomic_seg(wqe, wr);
2388 wqe += sizeof (struct mlx4_wqe_masked_atomic_seg);
2389
2390 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2391 sizeof (struct mlx4_wqe_masked_atomic_seg)) / 16;
2392
2393 break;
2394
2395 case IB_WR_RDMA_READ:
2396 case IB_WR_RDMA_WRITE:
2397 case IB_WR_RDMA_WRITE_WITH_IMM:
2398 set_raddr_seg(wqe, wr->wr.rdma.remote_addr,
2399 wr->wr.rdma.rkey);
2400 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2401 size += sizeof (struct mlx4_wqe_raddr_seg) / 16;
2402 break;
2403
2404 case IB_WR_LOCAL_INV:
2405 ctrl->srcrb_flags |=
2406 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2407 set_local_inv_seg(wqe, wr->ex.invalidate_rkey);
2408 wqe += sizeof (struct mlx4_wqe_local_inval_seg);
2409 size += sizeof (struct mlx4_wqe_local_inval_seg) / 16;
2410 break;
2411
2412 case IB_WR_FAST_REG_MR:
2413 ctrl->srcrb_flags |=
2414 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2415 set_fmr_seg(wqe, wr);
2416 wqe += sizeof (struct mlx4_wqe_fmr_seg);
2417 size += sizeof (struct mlx4_wqe_fmr_seg) / 16;
2418 break;
2419
2420 case IB_WR_BIND_MW:
2421 ctrl->srcrb_flags |=
2422 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2423 set_bind_seg(wqe, wr);
2424 wqe += sizeof(struct mlx4_wqe_bind_seg);
2425 size += sizeof(struct mlx4_wqe_bind_seg) / 16;
2426 break;
2427 default:
2428 /* No extra segments required for sends */
2429 break;
2430 }
2431 break;
2432
2433 case MLX4_IB_QPT_TUN_SMI_OWNER:
2434 err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2435 if (unlikely(err)) {
2436 *bad_wr = wr;
2437 goto out;
2438 }
2439 wqe += seglen;
2440 size += seglen / 16;
2441 break;
2442 case MLX4_IB_QPT_TUN_SMI:
2443 case MLX4_IB_QPT_TUN_GSI:
2444 /* this is a UD qp used in MAD responses to slaves. */
2445 set_datagram_seg(wqe, wr);
2446 /* set the forced-loopback bit in the data seg av */
2447 *(__be32 *) wqe |= cpu_to_be32(0x80000000);
2448 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2449 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2450 break;
2451 case MLX4_IB_QPT_UD:
2452 set_datagram_seg(wqe, wr);
2453 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2454 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2455
2456 if (wr->opcode == IB_WR_LSO) {
2457 err = build_lso_seg(wqe, wr, qp, &seglen, &lso_hdr_sz, &blh);
2458 if (unlikely(err)) {
2459 *bad_wr = wr;
2460 goto out;
2461 }
2462 lso_wqe = (__be32 *) wqe;
2463 wqe += seglen;
2464 size += seglen / 16;
2465 }
2466 break;
2467
2468 case MLX4_IB_QPT_PROXY_SMI_OWNER:
2469 if (unlikely(!mlx4_is_master(to_mdev(ibqp->device)->dev))) {
2470 err = -ENOSYS;
2471 *bad_wr = wr;
2472 goto out;
2473 }
2474 err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2475 if (unlikely(err)) {
2476 *bad_wr = wr;
2477 goto out;
2478 }
2479 wqe += seglen;
2480 size += seglen / 16;
2481 /* to start tunnel header on a cache-line boundary */
2482 add_zero_len_inline(wqe);
2483 wqe += 16;
2484 size++;
2485 build_tunnel_header(wr, wqe, &seglen);
2486 wqe += seglen;
2487 size += seglen / 16;
2488 break;
2489 case MLX4_IB_QPT_PROXY_SMI:
2490 /* don't allow QP0 sends on guests */
2491 err = -ENOSYS;
2492 *bad_wr = wr;
2493 goto out;
2494 case MLX4_IB_QPT_PROXY_GSI:
2495 /* If we are tunneling special qps, this is a UD qp.
2496 * In this case we first add a UD segment targeting
2497 * the tunnel qp, and then add a header with address
2498 * information */
2499 set_tunnel_datagram_seg(to_mdev(ibqp->device), wqe, wr, ibqp->qp_type);
2500 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2501 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2502 build_tunnel_header(wr, wqe, &seglen);
2503 wqe += seglen;
2504 size += seglen / 16;
2505 break;
2506
2507 case MLX4_IB_QPT_SMI:
2508 case MLX4_IB_QPT_GSI:
2509 err = build_mlx_header(to_msqp(qp), wr, ctrl, &seglen);
2510 if (unlikely(err)) {
2511 *bad_wr = wr;
2512 goto out;
2513 }
2514 wqe += seglen;
2515 size += seglen / 16;
2516 break;
2517
2518 default:
2519 break;
2520 }
2521
2522 /*
2523 * Write data segments in reverse order, so as to
2524 * overwrite cacheline stamp last within each
2525 * cacheline. This avoids issues with WQE
2526 * prefetching.
2527 */
2528
2529 dseg = wqe;
2530 dseg += wr->num_sge - 1;
2531 size += wr->num_sge * (sizeof (struct mlx4_wqe_data_seg) / 16);
2532
2533 /* Add one more inline data segment for ICRC for MLX sends */
2534 if (unlikely(qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
2535 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI ||
2536 qp->mlx4_ib_qp_type &
2537 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))) {
2538 set_mlx_icrc_seg(dseg + 1);
2539 size += sizeof (struct mlx4_wqe_data_seg) / 16;
2540 }
2541
2542 for (i = wr->num_sge - 1; i >= 0; --i, --dseg)
2543 set_data_seg(dseg, wr->sg_list + i);
2544
2545 /*
2546 * Possibly overwrite stamping in cacheline with LSO
2547 * segment only after making sure all data segments
2548 * are written.
2549 */
2550 wmb();
2551 *lso_wqe = lso_hdr_sz;
2552
2553 ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ?
2554 MLX4_WQE_CTRL_FENCE : 0) | size;
2555
2556 /*
2557 * Make sure descriptor is fully written before
2558 * setting ownership bit (because HW can start
2559 * executing as soon as we do).
2560 */
2561 wmb();
2562
2563 if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) {
2564 *bad_wr = wr;
2565 err = -EINVAL;
2566 goto out;
2567 }
2568
2569 ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] |
2570 (ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0) | blh;
2571
2572 stamp = ind + qp->sq_spare_wqes;
2573 ind += DIV_ROUND_UP(size * 16, 1U << qp->sq.wqe_shift);
2574
2575 /*
2576 * We can improve latency by not stamping the last
2577 * send queue WQE until after ringing the doorbell, so
2578 * only stamp here if there are still more WQEs to post.
2579 *
2580 * Same optimization applies to padding with NOP wqe
2581 * in case of WQE shrinking (used to prevent wrap-around
2582 * in the middle of WR).
2583 */
2584 if (wr->next) {
2585 stamp_send_wqe(qp, stamp, size * 16);
2586 ind = pad_wraparound(qp, ind);
2587 }
2588 }
2589
2590 out:
2591 if (likely(nreq)) {
2592 qp->sq.head += nreq;
2593
2594 /*
2595 * Make sure that descriptors are written before
2596 * doorbell record.
2597 */
2598 wmb();
2599
2600 writel(qp->doorbell_qpn,
2601 to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL);
2602
2603 /*
2604 * Make sure doorbells don't leak out of SQ spinlock
2605 * and reach the HCA out of order.
2606 */
2607 mmiowb();
2608
2609 stamp_send_wqe(qp, stamp, size * 16);
2610
2611 ind = pad_wraparound(qp, ind);
2612 qp->sq_next_wqe = ind;
2613 }
2614
2615 spin_unlock_irqrestore(&qp->sq.lock, flags);
2616
2617 return err;
2618 }
2619
2620 int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
2621 struct ib_recv_wr **bad_wr)
2622 {
2623 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2624 struct mlx4_wqe_data_seg *scat;
2625 unsigned long flags;
2626 int err = 0;
2627 int nreq;
2628 int ind;
2629 int max_gs;
2630 int i;
2631
2632 max_gs = qp->rq.max_gs;
2633 spin_lock_irqsave(&qp->rq.lock, flags);
2634
2635 ind = qp->rq.head & (qp->rq.wqe_cnt - 1);
2636
2637 for (nreq = 0; wr; ++nreq, wr = wr->next) {
2638 if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
2639 err = -ENOMEM;
2640 *bad_wr = wr;
2641 goto out;
2642 }
2643
2644 if (unlikely(wr->num_sge > qp->rq.max_gs)) {
2645 err = -EINVAL;
2646 *bad_wr = wr;
2647 goto out;
2648 }
2649
2650 scat = get_recv_wqe(qp, ind);
2651
2652 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
2653 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
2654 ib_dma_sync_single_for_device(ibqp->device,
2655 qp->sqp_proxy_rcv[ind].map,
2656 sizeof (struct mlx4_ib_proxy_sqp_hdr),
2657 DMA_FROM_DEVICE);
2658 scat->byte_count =
2659 cpu_to_be32(sizeof (struct mlx4_ib_proxy_sqp_hdr));
2660 /* use dma lkey from upper layer entry */
2661 scat->lkey = cpu_to_be32(wr->sg_list->lkey);
2662 scat->addr = cpu_to_be64(qp->sqp_proxy_rcv[ind].map);
2663 scat++;
2664 max_gs--;
2665 }
2666
2667 for (i = 0; i < wr->num_sge; ++i)
2668 __set_data_seg(scat + i, wr->sg_list + i);
2669
2670 if (i < max_gs) {
2671 scat[i].byte_count = 0;
2672 scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY);
2673 scat[i].addr = 0;
2674 }
2675
2676 qp->rq.wrid[ind] = wr->wr_id;
2677
2678 ind = (ind + 1) & (qp->rq.wqe_cnt - 1);
2679 }
2680
2681 out:
2682 if (likely(nreq)) {
2683 qp->rq.head += nreq;
2684
2685 /*
2686 * Make sure that descriptors are written before
2687 * doorbell record.
2688 */
2689 wmb();
2690
2691 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
2692 }
2693
2694 spin_unlock_irqrestore(&qp->rq.lock, flags);
2695
2696 return err;
2697 }
2698
2699 static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state)
2700 {
2701 switch (mlx4_state) {
2702 case MLX4_QP_STATE_RST: return IB_QPS_RESET;
2703 case MLX4_QP_STATE_INIT: return IB_QPS_INIT;
2704 case MLX4_QP_STATE_RTR: return IB_QPS_RTR;
2705 case MLX4_QP_STATE_RTS: return IB_QPS_RTS;
2706 case MLX4_QP_STATE_SQ_DRAINING:
2707 case MLX4_QP_STATE_SQD: return IB_QPS_SQD;
2708 case MLX4_QP_STATE_SQER: return IB_QPS_SQE;
2709 case MLX4_QP_STATE_ERR: return IB_QPS_ERR;
2710 default: return -1;
2711 }
2712 }
2713
2714 static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state)
2715 {
2716 switch (mlx4_mig_state) {
2717 case MLX4_QP_PM_ARMED: return IB_MIG_ARMED;
2718 case MLX4_QP_PM_REARM: return IB_MIG_REARM;
2719 case MLX4_QP_PM_MIGRATED: return IB_MIG_MIGRATED;
2720 default: return -1;
2721 }
2722 }
2723
2724 static int to_ib_qp_access_flags(int mlx4_flags)
2725 {
2726 int ib_flags = 0;
2727
2728 if (mlx4_flags & MLX4_QP_BIT_RRE)
2729 ib_flags |= IB_ACCESS_REMOTE_READ;
2730 if (mlx4_flags & MLX4_QP_BIT_RWE)
2731 ib_flags |= IB_ACCESS_REMOTE_WRITE;
2732 if (mlx4_flags & MLX4_QP_BIT_RAE)
2733 ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
2734
2735 return ib_flags;
2736 }
2737
2738 static void to_ib_ah_attr(struct mlx4_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr,
2739 struct mlx4_qp_path *path)
2740 {
2741 struct mlx4_dev *dev = ibdev->dev;
2742 int is_eth;
2743
2744 memset(ib_ah_attr, 0, sizeof *ib_ah_attr);
2745 ib_ah_attr->port_num = path->sched_queue & 0x40 ? 2 : 1;
2746
2747 if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports)
2748 return;
2749
2750 is_eth = rdma_port_get_link_layer(&ibdev->ib_dev, ib_ah_attr->port_num) ==
2751 IB_LINK_LAYER_ETHERNET;
2752 if (is_eth)
2753 ib_ah_attr->sl = ((path->sched_queue >> 3) & 0x7) |
2754 ((path->sched_queue & 4) << 1);
2755 else
2756 ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf;
2757
2758 ib_ah_attr->dlid = be16_to_cpu(path->rlid);
2759 ib_ah_attr->src_path_bits = path->grh_mylmc & 0x7f;
2760 ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0;
2761 ib_ah_attr->ah_flags = (path->grh_mylmc & (1 << 7)) ? IB_AH_GRH : 0;
2762 if (ib_ah_attr->ah_flags) {
2763 ib_ah_attr->grh.sgid_index = path->mgid_index;
2764 ib_ah_attr->grh.hop_limit = path->hop_limit;
2765 ib_ah_attr->grh.traffic_class =
2766 (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff;
2767 ib_ah_attr->grh.flow_label =
2768 be32_to_cpu(path->tclass_flowlabel) & 0xfffff;
2769 memcpy(ib_ah_attr->grh.dgid.raw,
2770 path->rgid, sizeof ib_ah_attr->grh.dgid.raw);
2771 }
2772 }
2773
2774 int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
2775 struct ib_qp_init_attr *qp_init_attr)
2776 {
2777 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
2778 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2779 struct mlx4_qp_context context;
2780 int mlx4_state;
2781 int err = 0;
2782
2783 mutex_lock(&qp->mutex);
2784
2785 if (qp->state == IB_QPS_RESET) {
2786 qp_attr->qp_state = IB_QPS_RESET;
2787 goto done;
2788 }
2789
2790 err = mlx4_qp_query(dev->dev, &qp->mqp, &context);
2791 if (err) {
2792 err = -EINVAL;
2793 goto out;
2794 }
2795
2796 mlx4_state = be32_to_cpu(context.flags) >> 28;
2797
2798 qp->state = to_ib_qp_state(mlx4_state);
2799 qp_attr->qp_state = qp->state;
2800 qp_attr->path_mtu = context.mtu_msgmax >> 5;
2801 qp_attr->path_mig_state =
2802 to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3);
2803 qp_attr->qkey = be32_to_cpu(context.qkey);
2804 qp_attr->rq_psn = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff;
2805 qp_attr->sq_psn = be32_to_cpu(context.next_send_psn) & 0xffffff;
2806 qp_attr->dest_qp_num = be32_to_cpu(context.remote_qpn) & 0xffffff;
2807 qp_attr->qp_access_flags =
2808 to_ib_qp_access_flags(be32_to_cpu(context.params2));
2809
2810 if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) {
2811 to_ib_ah_attr(dev, &qp_attr->ah_attr, &context.pri_path);
2812 to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context.alt_path);
2813 qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f;
2814 qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num;
2815 }
2816
2817 qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f;
2818 if (qp_attr->qp_state == IB_QPS_INIT)
2819 qp_attr->port_num = qp->port;
2820 else
2821 qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1;
2822
2823 /* qp_attr->en_sqd_async_notify is only applicable in modify qp */
2824 qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING;
2825
2826 qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7);
2827
2828 qp_attr->max_dest_rd_atomic =
2829 1 << ((be32_to_cpu(context.params2) >> 21) & 0x7);
2830 qp_attr->min_rnr_timer =
2831 (be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f;
2832 qp_attr->timeout = context.pri_path.ackto >> 3;
2833 qp_attr->retry_cnt = (be32_to_cpu(context.params1) >> 16) & 0x7;
2834 qp_attr->rnr_retry = (be32_to_cpu(context.params1) >> 13) & 0x7;
2835 qp_attr->alt_timeout = context.alt_path.ackto >> 3;
2836
2837 done:
2838 qp_attr->cur_qp_state = qp_attr->qp_state;
2839 qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt;
2840 qp_attr->cap.max_recv_sge = qp->rq.max_gs;
2841
2842 if (!ibqp->uobject) {
2843 qp_attr->cap.max_send_wr = qp->sq.wqe_cnt;
2844 qp_attr->cap.max_send_sge = qp->sq.max_gs;
2845 } else {
2846 qp_attr->cap.max_send_wr = 0;
2847 qp_attr->cap.max_send_sge = 0;
2848 }
2849
2850 /*
2851 * We don't support inline sends for kernel QPs (yet), and we
2852 * don't know what userspace's value should be.
2853 */
2854 qp_attr->cap.max_inline_data = 0;
2855
2856 qp_init_attr->cap = qp_attr->cap;
2857
2858 qp_init_attr->create_flags = 0;
2859 if (qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK)
2860 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
2861
2862 if (qp->flags & MLX4_IB_QP_LSO)
2863 qp_init_attr->create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
2864
2865 if (qp->flags & MLX4_IB_QP_NETIF)
2866 qp_init_attr->create_flags |= IB_QP_CREATE_NETIF_QP;
2867
2868 qp_init_attr->sq_sig_type =
2869 qp->sq_signal_bits == cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) ?
2870 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
2871
2872 out:
2873 mutex_unlock(&qp->mutex);
2874 return err;
2875 }
2876
Linux with added FPC-III support