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IB/mlx4: Use IBoE (RoCE) IP based GIDs in the port GID table
[linux-2.6-block.git] / drivers / infiniband / hw / mlx4 / qp.c
CommitLineData
225c7b1f
RD		 1/*
2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
51a379d0 3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
225c7b1f
RD		 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
ea54b10c 34#include <linux/log2.h>
5a0e3ad6 35#include <linux/slab.h>
fa417f7b 36#include <linux/netdevice.h>
ea54b10c 37
225c7b1f
RD		 38#include <rdma/ib_cache.h>
39#include <rdma/ib_pack.h>
4c3eb3ca 40#include <rdma/ib_addr.h>
1ffeb2eb 41#include <rdma/ib_mad.h>
225c7b1f
RD		 42
43#include <linux/mlx4/qp.h>
44
45#include "mlx4_ib.h"
46#include "user.h"
47
48enum {
49 MLX4_IB_ACK_REQ_FREQ = 8,
50};
51
52enum {
53 MLX4_IB_DEFAULT_SCHED_QUEUE = 0x83,
fa417f7b
EC		 54 MLX4_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f,
55 MLX4_IB_LINK_TYPE_IB = 0,
56 MLX4_IB_LINK_TYPE_ETH = 1
225c7b1f
RD		 57};
58
59enum {
60 /*
fa417f7b 61 * Largest possible UD header: send with GRH and immediate
4c3eb3ca
EC		 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)
225c7b1f 65 */
4c3eb3ca 66 MLX4_IB_UD_HEADER_SIZE = 82,
417608c2 67 MLX4_IB_LSO_HEADER_SPARE = 128,
225c7b1f
RD		 68};
69
fa417f7b
EC		 70enum {
71 MLX4_IB_IBOE_ETHERTYPE = 0x8915
72};
73
225c7b1f
RD		 74struct 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
83904132 83enum {
417608c2
EC		 84 MLX4_IB_MIN_SQ_STRIDE = 6,
85 MLX4_IB_CACHE_LINE_SIZE = 64,
83904132
JM		 86};
87
3987a2d3
OG		 88enum {
89 MLX4_RAW_QP_MTU = 7,
90 MLX4_RAW_QP_MSGMAX = 31,
91};
92
225c7b1f 93static const __be32 mlx4_ib_opcode[] = {
6fa8f719
VS		 94 [IB_WR_SEND] = cpu_to_be32(MLX4_OPCODE_SEND),
95 [IB_WR_LSO] = cpu_to_be32(MLX4_OPCODE_LSO),
96 [IB_WR_SEND_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_SEND_IMM),
97 [IB_WR_RDMA_WRITE] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE),
98 [IB_WR_RDMA_WRITE_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE_IMM),
99 [IB_WR_RDMA_READ] = cpu_to_be32(MLX4_OPCODE_RDMA_READ),
100 [IB_WR_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_ATOMIC_CS),
101 [IB_WR_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_ATOMIC_FA),
102 [IB_WR_SEND_WITH_INV] = cpu_to_be32(MLX4_OPCODE_SEND_INVAL),
103 [IB_WR_LOCAL_INV] = cpu_to_be32(MLX4_OPCODE_LOCAL_INVAL),
104 [IB_WR_FAST_REG_MR] = cpu_to_be32(MLX4_OPCODE_FMR),
105 [IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_CS),
106 [IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_FA),
6ff63e19 107 [IB_WR_BIND_MW] = cpu_to_be32(MLX4_OPCODE_BIND_MW),
225c7b1f
RD		 108};
109
110static struct mlx4_ib_sqp *to_msqp(struct mlx4_ib_qp *mqp)
111{
112 return container_of(mqp, struct mlx4_ib_sqp, qp);
113}
114
1ffeb2eb
JM		 115static int is_tunnel_qp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
116{
117 if (!mlx4_is_master(dev->dev))
118 return 0;
119
47605df9
JM		 120 return qp->mqp.qpn >= dev->dev->phys_caps.base_tunnel_sqpn &&
121 qp->mqp.qpn < dev->dev->phys_caps.base_tunnel_sqpn +
122 8 * MLX4_MFUNC_MAX;
1ffeb2eb
JM		 123}
124
225c7b1f
RD		 125static int is_sqp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
126{
47605df9
JM		 127 int proxy_sqp = 0;
128 int real_sqp = 0;
129 int i;
130 /* PPF or Native -- real SQP */
131 real_sqp = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) &&
132 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn &&
133 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 3);
134 if (real_sqp)
135 return 1;
136 /* VF or PF -- proxy SQP */
137 if (mlx4_is_mfunc(dev->dev)) {
138 for (i = 0; i < dev->dev->caps.num_ports; i++) {
139 if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i] ||
140 qp->mqp.qpn == dev->dev->caps.qp1_proxy[i]) {
141 proxy_sqp = 1;
142 break;
143 }
144 }
145 }
146 return proxy_sqp;
225c7b1f
RD		 147}
148
1ffeb2eb 149/* used for INIT/CLOSE port logic */
225c7b1f
RD		 150static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
151{
47605df9
JM		 152 int proxy_qp0 = 0;
153 int real_qp0 = 0;
154 int i;
155 /* PPF or Native -- real QP0 */
156 real_qp0 = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) &&
157 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn &&
158 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 1);
159 if (real_qp0)
160 return 1;
161 /* VF or PF -- proxy QP0 */
162 if (mlx4_is_mfunc(dev->dev)) {
163 for (i = 0; i < dev->dev->caps.num_ports; i++) {
164 if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i]) {
165 proxy_qp0 = 1;
166 break;
167 }
168 }
169 }
170 return proxy_qp0;
225c7b1f
RD		 171}
172
173static void *get_wqe(struct mlx4_ib_qp *qp, int offset)
174{
1c69fc2a 175 return mlx4_buf_offset(&qp->buf, offset);
225c7b1f
RD		 176}
177
178static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n)
179{
180 return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift));
181}
182
183static void *get_send_wqe(struct mlx4_ib_qp *qp, int n)
184{
185 return get_wqe(qp, qp->sq.offset + (n << qp->sq.wqe_shift));
186}
187
0e6e7416
RD		 188/*
189 * Stamp a SQ WQE so that it is invalid if prefetched by marking the
ea54b10c
JM		 190 * first four bytes of every 64 byte chunk with
191 * 0x7FFFFFF | (invalid_ownership_value << 31).
192 *
193 * When the max work request size is less than or equal to the WQE
194 * basic block size, as an optimization, we can stamp all WQEs with
195 * 0xffffffff, and skip the very first chunk of each WQE.
0e6e7416 196 */
ea54b10c 197static void stamp_send_wqe(struct mlx4_ib_qp *qp, int n, int size)
0e6e7416 198{
d2ae16d5 199 __be32 *wqe;
0e6e7416 200 int i;
ea54b10c
JM		 201 int s;
202 int ind;
203 void *buf;
204 __be32 stamp;
9670e553 205 struct mlx4_wqe_ctrl_seg *ctrl;
ea54b10c 206
ea54b10c 207 if (qp->sq_max_wqes_per_wr > 1) {
9670e553 208 s = roundup(size, 1U << qp->sq.wqe_shift);
ea54b10c
JM		 209 for (i = 0; i < s; i += 64) {
210 ind = (i >> qp->sq.wqe_shift) + n;
211 stamp = ind & qp->sq.wqe_cnt ? cpu_to_be32(0x7fffffff) :
212 cpu_to_be32(0xffffffff);
213 buf = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
214 wqe = buf + (i & ((1 << qp->sq.wqe_shift) - 1));
215 *wqe = stamp;
216 }
217 } else {
9670e553
EC		 218 ctrl = buf = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
219 s = (ctrl->fence_size & 0x3f) << 4;
ea54b10c
JM		 220 for (i = 64; i < s; i += 64) {
221 wqe = buf + i;
d2ae16d5 222 *wqe = cpu_to_be32(0xffffffff);
ea54b10c
JM		 223 }
224 }
225}
226
227static void post_nop_wqe(struct mlx4_ib_qp *qp, int n, int size)
228{
229 struct mlx4_wqe_ctrl_seg *ctrl;
230 struct mlx4_wqe_inline_seg *inl;
231 void *wqe;
232 int s;
233
234 ctrl = wqe = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
235 s = sizeof(struct mlx4_wqe_ctrl_seg);
236
237 if (qp->ibqp.qp_type == IB_QPT_UD) {
238 struct mlx4_wqe_datagram_seg *dgram = wqe + sizeof *ctrl;
239 struct mlx4_av *av = (struct mlx4_av *)dgram->av;
240 memset(dgram, 0, sizeof *dgram);
241 av->port_pd = cpu_to_be32((qp->port << 24) | to_mpd(qp->ibqp.pd)->pdn);
242 s += sizeof(struct mlx4_wqe_datagram_seg);
243 }
244
245 /* Pad the remainder of the WQE with an inline data segment. */
246 if (size > s) {
247 inl = wqe + s;
248 inl->byte_count = cpu_to_be32(1 << 31 | (size - s - sizeof *inl));
249 }
250 ctrl->srcrb_flags = 0;
251 ctrl->fence_size = size / 16;
252 /*
253 * Make sure descriptor is fully written before setting ownership bit
254 * (because HW can start executing as soon as we do).
255 */
256 wmb();
257
258 ctrl->owner_opcode = cpu_to_be32(MLX4_OPCODE_NOP | MLX4_WQE_CTRL_NEC) |
259 (n & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0);
0e6e7416 260
ea54b10c
JM		 261 stamp_send_wqe(qp, n + qp->sq_spare_wqes, size);
262}
263
264/* Post NOP WQE to prevent wrap-around in the middle of WR */
265static inline unsigned pad_wraparound(struct mlx4_ib_qp *qp, int ind)
266{
267 unsigned s = qp->sq.wqe_cnt - (ind & (qp->sq.wqe_cnt - 1));
268 if (unlikely(s < qp->sq_max_wqes_per_wr)) {
269 post_nop_wqe(qp, ind, s << qp->sq.wqe_shift);
270 ind += s;
271 }
272 return ind;
0e6e7416
RD		 273}
274
225c7b1f
RD		 275static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type)
276{
277 struct ib_event event;
278 struct ib_qp *ibqp = &to_mibqp(qp)->ibqp;
279
280 if (type == MLX4_EVENT_TYPE_PATH_MIG)
281 to_mibqp(qp)->port = to_mibqp(qp)->alt_port;
282
283 if (ibqp->event_handler) {
284 event.device = ibqp->device;
285 event.element.qp = ibqp;
286 switch (type) {
287 case MLX4_EVENT_TYPE_PATH_MIG:
288 event.event = IB_EVENT_PATH_MIG;
289 break;
290 case MLX4_EVENT_TYPE_COMM_EST:
291 event.event = IB_EVENT_COMM_EST;
292 break;
293 case MLX4_EVENT_TYPE_SQ_DRAINED:
294 event.event = IB_EVENT_SQ_DRAINED;
295 break;
296 case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
297 event.event = IB_EVENT_QP_LAST_WQE_REACHED;
298 break;
299 case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
300 event.event = IB_EVENT_QP_FATAL;
301 break;
302 case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
303 event.event = IB_EVENT_PATH_MIG_ERR;
304 break;
305 case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
306 event.event = IB_EVENT_QP_REQ_ERR;
307 break;
308 case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
309 event.event = IB_EVENT_QP_ACCESS_ERR;
310 break;
311 default:
987c8f8f 312 pr_warn("Unexpected event type %d "
225c7b1f
RD		 313 "on QP %06x\n", type, qp->qpn);
314 return;
315 }
316
317 ibqp->event_handler(&event, ibqp->qp_context);
318 }
319}
320
1ffeb2eb 321static int send_wqe_overhead(enum mlx4_ib_qp_type type, u32 flags)
225c7b1f
RD		 322{
323 /*
324 * UD WQEs must have a datagram segment.
325 * RC and UC WQEs might have a remote address segment.
326 * MLX WQEs need two extra inline data segments (for the UD
327 * header and space for the ICRC).
328 */
329 switch (type) {
1ffeb2eb 330 case MLX4_IB_QPT_UD:
225c7b1f 331 return sizeof (struct mlx4_wqe_ctrl_seg) +
b832be1e 332 sizeof (struct mlx4_wqe_datagram_seg) +
417608c2 333 ((flags & MLX4_IB_QP_LSO) ? MLX4_IB_LSO_HEADER_SPARE : 0);
1ffeb2eb
JM		 334 case MLX4_IB_QPT_PROXY_SMI_OWNER:
335 case MLX4_IB_QPT_PROXY_SMI:
336 case MLX4_IB_QPT_PROXY_GSI:
337 return sizeof (struct mlx4_wqe_ctrl_seg) +
338 sizeof (struct mlx4_wqe_datagram_seg) + 64;
339 case MLX4_IB_QPT_TUN_SMI_OWNER:
340 case MLX4_IB_QPT_TUN_GSI:
341 return sizeof (struct mlx4_wqe_ctrl_seg) +
342 sizeof (struct mlx4_wqe_datagram_seg);
343
344 case MLX4_IB_QPT_UC:
225c7b1f
RD		 345 return sizeof (struct mlx4_wqe_ctrl_seg) +
346 sizeof (struct mlx4_wqe_raddr_seg);
1ffeb2eb 347 case MLX4_IB_QPT_RC:
225c7b1f
RD		 348 return sizeof (struct mlx4_wqe_ctrl_seg) +
349 sizeof (struct mlx4_wqe_atomic_seg) +
350 sizeof (struct mlx4_wqe_raddr_seg);
1ffeb2eb
JM		 351 case MLX4_IB_QPT_SMI:
352 case MLX4_IB_QPT_GSI:
225c7b1f
RD		 353 return sizeof (struct mlx4_wqe_ctrl_seg) +
354 ALIGN(MLX4_IB_UD_HEADER_SIZE +
e61ef241
RD		 355 DIV_ROUND_UP(MLX4_IB_UD_HEADER_SIZE,
356 MLX4_INLINE_ALIGN) *
225c7b1f
RD		 357 sizeof (struct mlx4_wqe_inline_seg),
358 sizeof (struct mlx4_wqe_data_seg)) +
359 ALIGN(4 +
360 sizeof (struct mlx4_wqe_inline_seg),
361 sizeof (struct mlx4_wqe_data_seg));
362 default:
363 return sizeof (struct mlx4_wqe_ctrl_seg);
364 }
365}
366
2446304d 367static int set_rq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
0a1405da 368 int is_user, int has_rq, struct mlx4_ib_qp *qp)
225c7b1f 369{
2446304d 370 /* Sanity check RQ size before proceeding */
fc2d0044
SG		 371 if (cap->max_recv_wr > dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE ||
372 cap->max_recv_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg))
2446304d
EC		 373 return -EINVAL;
374
0a1405da 375 if (!has_rq) {
a4cd7ed8
RD		 376 if (cap->max_recv_wr)
377 return -EINVAL;
2446304d 378
0e6e7416 379 qp->rq.wqe_cnt = qp->rq.max_gs = 0;
a4cd7ed8
RD		 380 } else {
381 /* HW requires >= 1 RQ entry with >= 1 gather entry */
382 if (is_user && (!cap->max_recv_wr || !cap->max_recv_sge))
383 return -EINVAL;
384
0e6e7416 385 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, cap->max_recv_wr));
42c059ea 386 qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge));
a4cd7ed8
RD		 387 qp->rq.wqe_shift = ilog2(qp->rq.max_gs * sizeof (struct mlx4_wqe_data_seg));
388 }
2446304d 389
fc2d0044
SG		 390 /* leave userspace return values as they were, so as not to break ABI */
391 if (is_user) {
392 cap->max_recv_wr = qp->rq.max_post = qp->rq.wqe_cnt;
393 cap->max_recv_sge = qp->rq.max_gs;
394 } else {
395 cap->max_recv_wr = qp->rq.max_post =
396 min(dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE, qp->rq.wqe_cnt);
397 cap->max_recv_sge = min(qp->rq.max_gs,
398 min(dev->dev->caps.max_sq_sg,
399 dev->dev->caps.max_rq_sg));
400 }
2446304d
EC		 401
402 return 0;
403}
404
405static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
1ffeb2eb 406 enum mlx4_ib_qp_type type, struct mlx4_ib_qp *qp)
2446304d 407{
ea54b10c
JM		 408 int s;
409
2446304d 410 /* Sanity check SQ size before proceeding */
fc2d0044
SG		 411 if (cap->max_send_wr > (dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE) ||
412 cap->max_send_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg) ||
b832be1e 413 cap->max_inline_data + send_wqe_overhead(type, qp->flags) +
225c7b1f
RD		 414 sizeof (struct mlx4_wqe_inline_seg) > dev->dev->caps.max_sq_desc_sz)
415 return -EINVAL;
416
417 /*
418 * For MLX transport we need 2 extra S/G entries:
419 * one for the header and one for the checksum at the end
420 */
1ffeb2eb
JM		 421 if ((type == MLX4_IB_QPT_SMI || type == MLX4_IB_QPT_GSI ||
422 type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) &&
225c7b1f
RD		 423 cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg)
424 return -EINVAL;
425
ea54b10c
JM		 426 s = max(cap->max_send_sge * sizeof (struct mlx4_wqe_data_seg),
427 cap->max_inline_data + sizeof (struct mlx4_wqe_inline_seg)) +
b832be1e 428 send_wqe_overhead(type, qp->flags);
225c7b1f 429
cd155c1c
RD		 430 if (s > dev->dev->caps.max_sq_desc_sz)
431 return -EINVAL;
432
0e6e7416 433 /*
ea54b10c
JM		 434 * Hermon supports shrinking WQEs, such that a single work
435 * request can include multiple units of 1 << wqe_shift. This
436 * way, work requests can differ in size, and do not have to
437 * be a power of 2 in size, saving memory and speeding up send
438 * WR posting. Unfortunately, if we do this then the
439 * wqe_index field in CQEs can't be used to look up the WR ID
440 * anymore, so we do this only if selective signaling is off.
441 *
442 * Further, on 32-bit platforms, we can't use vmap() to make
af901ca1 443 * the QP buffer virtually contiguous. Thus we have to use
ea54b10c
JM		 444 * constant-sized WRs to make sure a WR is always fully within
445 * a single page-sized chunk.
446 *
447 * Finally, we use NOP work requests to pad the end of the
448 * work queue, to avoid wrap-around in the middle of WR. We
449 * set NEC bit to avoid getting completions with error for
450 * these NOP WRs, but since NEC is only supported starting
451 * with firmware 2.2.232, we use constant-sized WRs for older
452 * firmware.
453 *
454 * And, since MLX QPs only support SEND, we use constant-sized
455 * WRs in this case.
456 *
457 * We look for the smallest value of wqe_shift such that the
458 * resulting number of wqes does not exceed device
459 * capabilities.
460 *
461 * We set WQE size to at least 64 bytes, this way stamping
462 * invalidates each WQE.
0e6e7416 463 */
ea54b10c
JM		 464 if (dev->dev->caps.fw_ver >= MLX4_FW_VER_WQE_CTRL_NEC &&
465 qp->sq_signal_bits && BITS_PER_LONG == 64 &&
1ffeb2eb
JM		 466 type != MLX4_IB_QPT_SMI && type != MLX4_IB_QPT_GSI &&
467 !(type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_PROXY_SMI |
468 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER)))
ea54b10c
JM		 469 qp->sq.wqe_shift = ilog2(64);
470 else
471 qp->sq.wqe_shift = ilog2(roundup_pow_of_two(s));
472
473 for (;;) {
ea54b10c
JM		 474 qp->sq_max_wqes_per_wr = DIV_ROUND_UP(s, 1U << qp->sq.wqe_shift);
475
476 /*
477 * We need to leave 2 KB + 1 WR of headroom in the SQ to
478 * allow HW to prefetch.
479 */
480 qp->sq_spare_wqes = (2048 >> qp->sq.wqe_shift) + qp->sq_max_wqes_per_wr;
481 qp->sq.wqe_cnt = roundup_pow_of_two(cap->max_send_wr *
482 qp->sq_max_wqes_per_wr +
483 qp->sq_spare_wqes);
484
485 if (qp->sq.wqe_cnt <= dev->dev->caps.max_wqes)
486 break;
487
488 if (qp->sq_max_wqes_per_wr <= 1)
489 return -EINVAL;
490
491 ++qp->sq.wqe_shift;
492 }
493
cd155c1c
RD		 494 qp->sq.max_gs = (min(dev->dev->caps.max_sq_desc_sz,
495 (qp->sq_max_wqes_per_wr << qp->sq.wqe_shift)) -
b832be1e
EC		 496 send_wqe_overhead(type, qp->flags)) /
497 sizeof (struct mlx4_wqe_data_seg);
0e6e7416
RD		 498
499 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
500 (qp->sq.wqe_cnt << qp->sq.wqe_shift);
225c7b1f
RD		 501 if (qp->rq.wqe_shift > qp->sq.wqe_shift) {
502 qp->rq.offset = 0;
0e6e7416 503 qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift;
225c7b1f 504 } else {
0e6e7416 505 qp->rq.offset = qp->sq.wqe_cnt << qp->sq.wqe_shift;
225c7b1f
RD		 506 qp->sq.offset = 0;
507 }
508
ea54b10c
JM		 509 cap->max_send_wr = qp->sq.max_post =
510 (qp->sq.wqe_cnt - qp->sq_spare_wqes) / qp->sq_max_wqes_per_wr;
cd155c1c
RD		 511 cap->max_send_sge = min(qp->sq.max_gs,
512 min(dev->dev->caps.max_sq_sg,
513 dev->dev->caps.max_rq_sg));
54e95f8d
RD		 514 /* We don't support inline sends for kernel QPs (yet) */
515 cap->max_inline_data = 0;
225c7b1f
RD		 516
517 return 0;
518}
519
83904132
JM		 520static int set_user_sq_size(struct mlx4_ib_dev *dev,
521 struct mlx4_ib_qp *qp,
2446304d
EC		 522 struct mlx4_ib_create_qp *ucmd)
523{
83904132
JM		 524 /* Sanity check SQ size before proceeding */
525 if ((1 << ucmd->log_sq_bb_count) > dev->dev->caps.max_wqes ||
526 ucmd->log_sq_stride >
527 ilog2(roundup_pow_of_two(dev->dev->caps.max_sq_desc_sz)) ||
528 ucmd->log_sq_stride < MLX4_IB_MIN_SQ_STRIDE)
529 return -EINVAL;
530
0e6e7416 531 qp->sq.wqe_cnt = 1 << ucmd->log_sq_bb_count;
2446304d
EC		 532 qp->sq.wqe_shift = ucmd->log_sq_stride;
533
0e6e7416
RD		 534 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
535 (qp->sq.wqe_cnt << qp->sq.wqe_shift);
2446304d
EC		 536
537 return 0;
538}
539
1ffeb2eb
JM		 540static int alloc_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp)
541{
542 int i;
543
544 qp->sqp_proxy_rcv =
545 kmalloc(sizeof (struct mlx4_ib_buf) * qp->rq.wqe_cnt,
546 GFP_KERNEL);
547 if (!qp->sqp_proxy_rcv)
548 return -ENOMEM;
549 for (i = 0; i < qp->rq.wqe_cnt; i++) {
550 qp->sqp_proxy_rcv[i].addr =
551 kmalloc(sizeof (struct mlx4_ib_proxy_sqp_hdr),
552 GFP_KERNEL);
553 if (!qp->sqp_proxy_rcv[i].addr)
554 goto err;
555 qp->sqp_proxy_rcv[i].map =
556 ib_dma_map_single(dev, qp->sqp_proxy_rcv[i].addr,
557 sizeof (struct mlx4_ib_proxy_sqp_hdr),
558 DMA_FROM_DEVICE);
559 }
560 return 0;
561
562err:
563 while (i > 0) {
564 --i;
565 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map,
566 sizeof (struct mlx4_ib_proxy_sqp_hdr),
567 DMA_FROM_DEVICE);
568 kfree(qp->sqp_proxy_rcv[i].addr);
569 }
570 kfree(qp->sqp_proxy_rcv);
571 qp->sqp_proxy_rcv = NULL;
572 return -ENOMEM;
573}
574
575static void free_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp)
576{
577 int i;
578
579 for (i = 0; i < qp->rq.wqe_cnt; i++) {
580 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map,
581 sizeof (struct mlx4_ib_proxy_sqp_hdr),
582 DMA_FROM_DEVICE);
583 kfree(qp->sqp_proxy_rcv[i].addr);
584 }
585 kfree(qp->sqp_proxy_rcv);
586}
587
0a1405da
SH		 588static int qp_has_rq(struct ib_qp_init_attr *attr)
589{
590 if (attr->qp_type == IB_QPT_XRC_INI || attr->qp_type == IB_QPT_XRC_TGT)
591 return 0;
592
593 return !attr->srq;
594}
595
225c7b1f
RD		 596static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
597 struct ib_qp_init_attr *init_attr,
1ffeb2eb 598 struct ib_udata *udata, int sqpn, struct mlx4_ib_qp **caller_qp)
225c7b1f 599{
a3cdcbfa 600 int qpn;
225c7b1f 601 int err;
1ffeb2eb
JM		 602 struct mlx4_ib_sqp *sqp;
603 struct mlx4_ib_qp *qp;
604 enum mlx4_ib_qp_type qp_type = (enum mlx4_ib_qp_type) init_attr->qp_type;
605
606 /* When tunneling special qps, we use a plain UD qp */
607 if (sqpn) {
608 if (mlx4_is_mfunc(dev->dev) &&
609 (!mlx4_is_master(dev->dev) ||
610 !(init_attr->create_flags & MLX4_IB_SRIOV_SQP))) {
611 if (init_attr->qp_type == IB_QPT_GSI)
612 qp_type = MLX4_IB_QPT_PROXY_GSI;
613 else if (mlx4_is_master(dev->dev))
614 qp_type = MLX4_IB_QPT_PROXY_SMI_OWNER;
615 else
616 qp_type = MLX4_IB_QPT_PROXY_SMI;
617 }
618 qpn = sqpn;
619 /* add extra sg entry for tunneling */
620 init_attr->cap.max_recv_sge++;
621 } else if (init_attr->create_flags & MLX4_IB_SRIOV_TUNNEL_QP) {
622 struct mlx4_ib_qp_tunnel_init_attr *tnl_init =
623 container_of(init_attr,
624 struct mlx4_ib_qp_tunnel_init_attr, init_attr);
625 if ((tnl_init->proxy_qp_type != IB_QPT_SMI &&
626 tnl_init->proxy_qp_type != IB_QPT_GSI) ||
627 !mlx4_is_master(dev->dev))
628 return -EINVAL;
629 if (tnl_init->proxy_qp_type == IB_QPT_GSI)
630 qp_type = MLX4_IB_QPT_TUN_GSI;
631 else if (tnl_init->slave == mlx4_master_func_num(dev->dev))
632 qp_type = MLX4_IB_QPT_TUN_SMI_OWNER;
633 else
634 qp_type = MLX4_IB_QPT_TUN_SMI;
47605df9
JM		 635 /* we are definitely in the PPF here, since we are creating
636 * tunnel QPs. base_tunnel_sqpn is therefore valid. */
637 qpn = dev->dev->phys_caps.base_tunnel_sqpn + 8 * tnl_init->slave
638 + tnl_init->proxy_qp_type * 2 + tnl_init->port - 1;
1ffeb2eb
JM		 639 sqpn = qpn;
640 }
641
642 if (!*caller_qp) {
643 if (qp_type == MLX4_IB_QPT_SMI || qp_type == MLX4_IB_QPT_GSI ||
644 (qp_type & (MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_SMI_OWNER |
645 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER))) {
646 sqp = kzalloc(sizeof (struct mlx4_ib_sqp), GFP_KERNEL);
647 if (!sqp)
648 return -ENOMEM;
649 qp = &sqp->qp;
650 } else {
651 qp = kzalloc(sizeof (struct mlx4_ib_qp), GFP_KERNEL);
652 if (!qp)
653 return -ENOMEM;
654 }
655 } else
656 qp = *caller_qp;
657
658 qp->mlx4_ib_qp_type = qp_type;
225c7b1f
RD		 659
660 mutex_init(&qp->mutex);
661 spin_lock_init(&qp->sq.lock);
662 spin_lock_init(&qp->rq.lock);
fa417f7b 663 INIT_LIST_HEAD(&qp->gid_list);
0ff1fb65 664 INIT_LIST_HEAD(&qp->steering_rules);
225c7b1f
RD		 665
666 qp->state = IB_QPS_RESET;
ea54b10c
JM		 667 if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
668 qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
225c7b1f 669
0a1405da 670 err = set_rq_size(dev, &init_attr->cap, !!pd->uobject, qp_has_rq(init_attr), qp);
225c7b1f
RD		 671 if (err)
672 goto err;
673
674 if (pd->uobject) {
675 struct mlx4_ib_create_qp ucmd;
676
677 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
678 err = -EFAULT;
679 goto err;
680 }
681
0e6e7416
RD		 682 qp->sq_no_prefetch = ucmd.sq_no_prefetch;
683
83904132 684 err = set_user_sq_size(dev, qp, &ucmd);
2446304d
EC		 685 if (err)
686 goto err;
687
225c7b1f 688 qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
cb9fbc5c 689 qp->buf_size, 0, 0);
225c7b1f
RD		 690 if (IS_ERR(qp->umem)) {
691 err = PTR_ERR(qp->umem);
692 goto err;
693 }
694
695 err = mlx4_mtt_init(dev->dev, ib_umem_page_count(qp->umem),
696 ilog2(qp->umem->page_size), &qp->mtt);
697 if (err)
698 goto err_buf;
699
700 err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem);
701 if (err)
702 goto err_mtt;
703
0a1405da 704 if (qp_has_rq(init_attr)) {
02d89b87
RD		 705 err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context),
706 ucmd.db_addr, &qp->db);
707 if (err)
708 goto err_mtt;
709 }
225c7b1f 710 } else {
0e6e7416
RD		 711 qp->sq_no_prefetch = 0;
712
521e575b
RL		 713 if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK)
714 qp->flags |= MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK;
715
b832be1e
EC		 716 if (init_attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO)
717 qp->flags |= MLX4_IB_QP_LSO;
718
1ffeb2eb 719 err = set_kernel_sq_size(dev, &init_attr->cap, qp_type, qp);
2446304d
EC		 720 if (err)
721 goto err;
722
0a1405da 723 if (qp_has_rq(init_attr)) {
6296883c 724 err = mlx4_db_alloc(dev->dev, &qp->db, 0);
02d89b87
RD		 725 if (err)
726 goto err;
225c7b1f 727
02d89b87
RD		 728 *qp->db.db = 0;
729 }
225c7b1f
RD		 730
731 if (mlx4_buf_alloc(dev->dev, qp->buf_size, PAGE_SIZE * 2, &qp->buf)) {
732 err = -ENOMEM;
733 goto err_db;
734 }
735
736 err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift,
737 &qp->mtt);
738 if (err)
739 goto err_buf;
740
741 err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf);
742 if (err)
743 goto err_mtt;
744
0e6e7416
RD		 745 qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof (u64), GFP_KERNEL);
746 qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof (u64), GFP_KERNEL);
225c7b1f
RD		 747
748 if (!qp->sq.wrid || !qp->rq.wrid) {
749 err = -ENOMEM;
750 goto err_wrid;
751 }
225c7b1f
RD		 752 }
753
a3cdcbfa 754 if (sqpn) {
1ffeb2eb
JM		 755 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
756 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
757 if (alloc_proxy_bufs(pd->device, qp)) {
758 err = -ENOMEM;
759 goto err_wrid;
760 }
761 }
a3cdcbfa 762 } else {
3987a2d3
OG		 763 /* Raw packet QPNs must be aligned to 8 bits. If not, the WQE
764 * BlueFlame setup flow wrongly causes VLAN insertion. */
765 if (init_attr->qp_type == IB_QPT_RAW_PACKET)
766 err = mlx4_qp_reserve_range(dev->dev, 1, 1 << 8, &qpn);
767 else
768 err = mlx4_qp_reserve_range(dev->dev, 1, 1, &qpn);
a3cdcbfa 769 if (err)
1ffeb2eb 770 goto err_proxy;
a3cdcbfa
YP		 771 }
772
773 err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp);
225c7b1f 774 if (err)
a3cdcbfa 775 goto err_qpn;
225c7b1f 776
0a1405da
SH		 777 if (init_attr->qp_type == IB_QPT_XRC_TGT)
778 qp->mqp.qpn |= (1 << 23);
779
225c7b1f
RD		 780 /*
781 * Hardware wants QPN written in big-endian order (after
782 * shifting) for send doorbell. Precompute this value to save
783 * a little bit when posting sends.
784 */
785 qp->doorbell_qpn = swab32(qp->mqp.qpn << 8);
786
225c7b1f 787 qp->mqp.event = mlx4_ib_qp_event;
1ffeb2eb
JM		 788 if (!*caller_qp)
789 *caller_qp = qp;
225c7b1f
RD		 790 return 0;
791
a3cdcbfa
YP		 792err_qpn:
793 if (!sqpn)
794 mlx4_qp_release_range(dev->dev, qpn, 1);
1ffeb2eb
JM		 795err_proxy:
796 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI)
797 free_proxy_bufs(pd->device, qp);
225c7b1f 798err_wrid:
23f1b384 799 if (pd->uobject) {
0a1405da
SH		 800 if (qp_has_rq(init_attr))
801 mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db);
23f1b384 802 } else {
225c7b1f
RD		 803 kfree(qp->sq.wrid);
804 kfree(qp->rq.wrid);
805 }
806
807err_mtt:
808 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
809
810err_buf:
811 if (pd->uobject)
812 ib_umem_release(qp->umem);
813 else
814 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
815
816err_db:
0a1405da 817 if (!pd->uobject && qp_has_rq(init_attr))
6296883c 818 mlx4_db_free(dev->dev, &qp->db);
225c7b1f
RD		 819
820err:
1ffeb2eb
JM		 821 if (!*caller_qp)
822 kfree(qp);
225c7b1f
RD		 823 return err;
824}
825
826static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state)
827{
828 switch (state) {
829 case IB_QPS_RESET: return MLX4_QP_STATE_RST;
830 case IB_QPS_INIT: return MLX4_QP_STATE_INIT;
831 case IB_QPS_RTR: return MLX4_QP_STATE_RTR;
832 case IB_QPS_RTS: return MLX4_QP_STATE_RTS;
833 case IB_QPS_SQD: return MLX4_QP_STATE_SQD;
834 case IB_QPS_SQE: return MLX4_QP_STATE_SQER;
835 case IB_QPS_ERR: return MLX4_QP_STATE_ERR;
836 default: return -1;
837 }
838}
839
840static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
338a8fad 841 __acquires(&send_cq->lock) __acquires(&recv_cq->lock)
225c7b1f 842{
338a8fad 843 if (send_cq == recv_cq) {
225c7b1f 844 spin_lock_irq(&send_cq->lock);
338a8fad
RD		 845 __acquire(&recv_cq->lock);
846 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
225c7b1f
RD		 847 spin_lock_irq(&send_cq->lock);
848 spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING);
849 } else {
850 spin_lock_irq(&recv_cq->lock);
851 spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING);
852 }
853}
854
855static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
338a8fad 856 __releases(&send_cq->lock) __releases(&recv_cq->lock)
225c7b1f 857{
338a8fad
RD		 858 if (send_cq == recv_cq) {
859 __release(&recv_cq->lock);
225c7b1f 860 spin_unlock_irq(&send_cq->lock);
338a8fad 861 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
225c7b1f
RD		 862 spin_unlock(&recv_cq->lock);
863 spin_unlock_irq(&send_cq->lock);
864 } else {
865 spin_unlock(&send_cq->lock);
866 spin_unlock_irq(&recv_cq->lock);
867 }
868}
869
fa417f7b
EC		 870static void del_gid_entries(struct mlx4_ib_qp *qp)
871{
872 struct mlx4_ib_gid_entry *ge, *tmp;
873
874 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
875 list_del(&ge->list);
876 kfree(ge);
877 }
878}
879
0a1405da
SH		 880static struct mlx4_ib_pd *get_pd(struct mlx4_ib_qp *qp)
881{
882 if (qp->ibqp.qp_type == IB_QPT_XRC_TGT)
883 return to_mpd(to_mxrcd(qp->ibqp.xrcd)->pd);
884 else
885 return to_mpd(qp->ibqp.pd);
886}
887
888static void get_cqs(struct mlx4_ib_qp *qp,
889 struct mlx4_ib_cq **send_cq, struct mlx4_ib_cq **recv_cq)
890{
891 switch (qp->ibqp.qp_type) {
892 case IB_QPT_XRC_TGT:
893 *send_cq = to_mcq(to_mxrcd(qp->ibqp.xrcd)->cq);
894 *recv_cq = *send_cq;
895 break;
896 case IB_QPT_XRC_INI:
897 *send_cq = to_mcq(qp->ibqp.send_cq);
898 *recv_cq = *send_cq;
899 break;
900 default:
901 *send_cq = to_mcq(qp->ibqp.send_cq);
902 *recv_cq = to_mcq(qp->ibqp.recv_cq);
903 break;
904 }
905}
906
225c7b1f
RD		 907static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
908 int is_user)
909{
910 struct mlx4_ib_cq *send_cq, *recv_cq;
911
912 if (qp->state != IB_QPS_RESET)
913 if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state),
914 MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp))
987c8f8f 915 pr_warn("modify QP %06x to RESET failed.\n",
225c7b1f
RD		 916 qp->mqp.qpn);
917
0a1405da 918 get_cqs(qp, &send_cq, &recv_cq);
225c7b1f
RD		 919
920 mlx4_ib_lock_cqs(send_cq, recv_cq);
921
922 if (!is_user) {
923 __mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
924 qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL);
925 if (send_cq != recv_cq)
926 __mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
927 }
928
929 mlx4_qp_remove(dev->dev, &qp->mqp);
930
931 mlx4_ib_unlock_cqs(send_cq, recv_cq);
932
933 mlx4_qp_free(dev->dev, &qp->mqp);
a3cdcbfa 934
1ffeb2eb 935 if (!is_sqp(dev, qp) && !is_tunnel_qp(dev, qp))
a3cdcbfa
YP		 936 mlx4_qp_release_range(dev->dev, qp->mqp.qpn, 1);
937
225c7b1f
RD		 938 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
939
940 if (is_user) {
0a1405da 941 if (qp->rq.wqe_cnt)
02d89b87
RD		 942 mlx4_ib_db_unmap_user(to_mucontext(qp->ibqp.uobject->context),
943 &qp->db);
225c7b1f
RD		 944 ib_umem_release(qp->umem);
945 } else {
946 kfree(qp->sq.wrid);
947 kfree(qp->rq.wrid);
1ffeb2eb
JM		 948 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
949 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI))
950 free_proxy_bufs(&dev->ib_dev, qp);
225c7b1f 951 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
0a1405da 952 if (qp->rq.wqe_cnt)
6296883c 953 mlx4_db_free(dev->dev, &qp->db);
225c7b1f 954 }
fa417f7b
EC		 955
956 del_gid_entries(qp);
225c7b1f
RD		 957}
958
47605df9
JM		 959static u32 get_sqp_num(struct mlx4_ib_dev *dev, struct ib_qp_init_attr *attr)
960{
961 /* Native or PPF */
962 if (!mlx4_is_mfunc(dev->dev) ||
963 (mlx4_is_master(dev->dev) &&
964 attr->create_flags & MLX4_IB_SRIOV_SQP)) {
965 return dev->dev->phys_caps.base_sqpn +
966 (attr->qp_type == IB_QPT_SMI ? 0 : 2) +
967 attr->port_num - 1;
968 }
969 /* PF or VF -- creating proxies */
970 if (attr->qp_type == IB_QPT_SMI)
971 return dev->dev->caps.qp0_proxy[attr->port_num - 1];
972 else
973 return dev->dev->caps.qp1_proxy[attr->port_num - 1];
974}
975
225c7b1f
RD		 976struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd,
977 struct ib_qp_init_attr *init_attr,
978 struct ib_udata *udata)
979{
1ffeb2eb 980 struct mlx4_ib_qp *qp = NULL;
225c7b1f 981 int err;
0a1405da 982 u16 xrcdn = 0;
225c7b1f 983
521e575b 984 /*
1ffeb2eb
JM		 985 * We only support LSO, vendor flag1, and multicast loopback blocking,
986 * and only for kernel UD QPs.
521e575b 987 */
1ffeb2eb
JM		 988 if (init_attr->create_flags & ~(MLX4_IB_QP_LSO |
989 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK |
990 MLX4_IB_SRIOV_TUNNEL_QP | MLX4_IB_SRIOV_SQP))
b832be1e 991 return ERR_PTR(-EINVAL);
521e575b
RL		 992
993 if (init_attr->create_flags &&
1ffeb2eb
JM		 994 (udata ||
995 ((init_attr->create_flags & ~MLX4_IB_SRIOV_SQP) &&
996 init_attr->qp_type != IB_QPT_UD) ||
997 ((init_attr->create_flags & MLX4_IB_SRIOV_SQP) &&
998 init_attr->qp_type > IB_QPT_GSI)))
b846f25a
EC		 999 return ERR_PTR(-EINVAL);
1000
225c7b1f 1001 switch (init_attr->qp_type) {
0a1405da
SH		 1002 case IB_QPT_XRC_TGT:
1003 pd = to_mxrcd(init_attr->xrcd)->pd;
1004 xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn;
1005 init_attr->send_cq = to_mxrcd(init_attr->xrcd)->cq;
1006 /* fall through */
1007 case IB_QPT_XRC_INI:
1008 if (!(to_mdev(pd->device)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC))
1009 return ERR_PTR(-ENOSYS);
1010 init_attr->recv_cq = init_attr->send_cq;
1011 /* fall through */
225c7b1f
RD		 1012 case IB_QPT_RC:
1013 case IB_QPT_UC:
3987a2d3 1014 case IB_QPT_RAW_PACKET:
f507d28b 1015 qp = kzalloc(sizeof *qp, GFP_KERNEL);
225c7b1f
RD		 1016 if (!qp)
1017 return ERR_PTR(-ENOMEM);
1ffeb2eb
JM		 1018 /* fall through */
1019 case IB_QPT_UD:
1020 {
1021 err = create_qp_common(to_mdev(pd->device), pd, init_attr,
1022 udata, 0, &qp);
1023 if (err)
225c7b1f 1024 return ERR_PTR(err);
225c7b1f
RD		 1025
1026 qp->ibqp.qp_num = qp->mqp.qpn;
0a1405da 1027 qp->xrcdn = xrcdn;
225c7b1f
RD		 1028
1029 break;
1030 }
1031 case IB_QPT_SMI:
1032 case IB_QPT_GSI:
1033 {
1034 /* Userspace is not allowed to create special QPs: */
0a1405da 1035 if (udata)
225c7b1f
RD		 1036 return ERR_PTR(-EINVAL);
1037
0a1405da 1038 err = create_qp_common(to_mdev(pd->device), pd, init_attr, udata,
47605df9 1039 get_sqp_num(to_mdev(pd->device), init_attr),
1ffeb2eb
JM		 1040 &qp);
1041 if (err)
225c7b1f 1042 return ERR_PTR(err);
225c7b1f
RD		 1043
1044 qp->port = init_attr->port_num;
1045 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
1046
1047 break;
1048 }
1049 default:
1050 /* Don't support raw QPs */
1051 return ERR_PTR(-EINVAL);
1052 }
1053
1054 return &qp->ibqp;
1055}
1056
1057int mlx4_ib_destroy_qp(struct ib_qp *qp)
1058{
1059 struct mlx4_ib_dev *dev = to_mdev(qp->device);
1060 struct mlx4_ib_qp *mqp = to_mqp(qp);
0a1405da 1061 struct mlx4_ib_pd *pd;
225c7b1f
RD		 1062
1063 if (is_qp0(dev, mqp))
1064 mlx4_CLOSE_PORT(dev->dev, mqp->port);
1065
0a1405da
SH		 1066 pd = get_pd(mqp);
1067 destroy_qp_common(dev, mqp, !!pd->ibpd.uobject);
225c7b1f
RD		 1068
1069 if (is_sqp(dev, mqp))
1070 kfree(to_msqp(mqp));
1071 else
1072 kfree(mqp);
1073
1074 return 0;
1075}
1076
1ffeb2eb 1077static int to_mlx4_st(struct mlx4_ib_dev *dev, enum mlx4_ib_qp_type type)
225c7b1f
RD		 1078{
1079 switch (type) {
1ffeb2eb
JM		 1080 case MLX4_IB_QPT_RC: return MLX4_QP_ST_RC;
1081 case MLX4_IB_QPT_UC: return MLX4_QP_ST_UC;
1082 case MLX4_IB_QPT_UD: return MLX4_QP_ST_UD;
1083 case MLX4_IB_QPT_XRC_INI:
1084 case MLX4_IB_QPT_XRC_TGT: return MLX4_QP_ST_XRC;
1085 case MLX4_IB_QPT_SMI:
1086 case MLX4_IB_QPT_GSI:
1087 case MLX4_IB_QPT_RAW_PACKET: return MLX4_QP_ST_MLX;
1088
1089 case MLX4_IB_QPT_PROXY_SMI_OWNER:
1090 case MLX4_IB_QPT_TUN_SMI_OWNER: return (mlx4_is_mfunc(dev->dev) ?
1091 MLX4_QP_ST_MLX : -1);
1092 case MLX4_IB_QPT_PROXY_SMI:
1093 case MLX4_IB_QPT_TUN_SMI:
1094 case MLX4_IB_QPT_PROXY_GSI:
1095 case MLX4_IB_QPT_TUN_GSI: return (mlx4_is_mfunc(dev->dev) ?
1096 MLX4_QP_ST_UD : -1);
1097 default: return -1;
225c7b1f
RD		 1098 }
1099}
1100
65adfa91 1101static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, const struct ib_qp_attr *attr,
225c7b1f
RD		 1102 int attr_mask)
1103{
1104 u8 dest_rd_atomic;
1105 u32 access_flags;
1106 u32 hw_access_flags = 0;
1107
1108 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1109 dest_rd_atomic = attr->max_dest_rd_atomic;
1110 else
1111 dest_rd_atomic = qp->resp_depth;
1112
1113 if (attr_mask & IB_QP_ACCESS_FLAGS)
1114 access_flags = attr->qp_access_flags;
1115 else
1116 access_flags = qp->atomic_rd_en;
1117
1118 if (!dest_rd_atomic)
1119 access_flags &= IB_ACCESS_REMOTE_WRITE;
1120
1121 if (access_flags & IB_ACCESS_REMOTE_READ)
1122 hw_access_flags |= MLX4_QP_BIT_RRE;
1123 if (access_flags & IB_ACCESS_REMOTE_ATOMIC)
1124 hw_access_flags |= MLX4_QP_BIT_RAE;
1125 if (access_flags & IB_ACCESS_REMOTE_WRITE)
1126 hw_access_flags |= MLX4_QP_BIT_RWE;
1127
1128 return cpu_to_be32(hw_access_flags);
1129}
1130
65adfa91 1131static void store_sqp_attrs(struct mlx4_ib_sqp *sqp, const struct ib_qp_attr *attr,
225c7b1f
RD		 1132 int attr_mask)
1133{
1134 if (attr_mask & IB_QP_PKEY_INDEX)
1135 sqp->pkey_index = attr->pkey_index;
1136 if (attr_mask & IB_QP_QKEY)
1137 sqp->qkey = attr->qkey;
1138 if (attr_mask & IB_QP_SQ_PSN)
1139 sqp->send_psn = attr->sq_psn;
1140}
1141
1142static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port)
1143{
1144 path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6);
1145}
1146
65adfa91 1147static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah,
225c7b1f
RD		 1148 struct mlx4_qp_path *path, u8 port)
1149{
fa417f7b
EC		 1150 int err;
1151 int is_eth = rdma_port_get_link_layer(&dev->ib_dev, port) ==
1152 IB_LINK_LAYER_ETHERNET;
1153 u8 mac[6];
1154 int is_mcast;
4c3eb3ca
EC		 1155 u16 vlan_tag;
1156 int vidx;
fa417f7b 1157
225c7b1f
RD		 1158 path->grh_mylmc = ah->src_path_bits & 0x7f;
1159 path->rlid = cpu_to_be16(ah->dlid);
1160 if (ah->static_rate) {
1161 path->static_rate = ah->static_rate + MLX4_STAT_RATE_OFFSET;
1162 while (path->static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
1163 !(1 << path->static_rate & dev->dev->caps.stat_rate_support))
1164 --path->static_rate;
1165 } else
1166 path->static_rate = 0;
225c7b1f
RD		 1167
1168 if (ah->ah_flags & IB_AH_GRH) {
5ae2a7a8 1169 if (ah->grh.sgid_index >= dev->dev->caps.gid_table_len[port]) {
987c8f8f 1170 pr_err("sgid_index (%u) too large. max is %d\n",
5ae2a7a8 1171 ah->grh.sgid_index, dev->dev->caps.gid_table_len[port] - 1);
225c7b1f
RD		 1172 return -1;
1173 }
1174
1175 path->grh_mylmc |= 1 << 7;
1176 path->mgid_index = ah->grh.sgid_index;
1177 path->hop_limit = ah->grh.hop_limit;
1178 path->tclass_flowlabel =
1179 cpu_to_be32((ah->grh.traffic_class << 20) |
1180 (ah->grh.flow_label));
1181 memcpy(path->rgid, ah->grh.dgid.raw, 16);
1182 }
1183
fa417f7b 1184 if (is_eth) {
4c3eb3ca 1185 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
9106c410 1186 ((port - 1) << 6) | ((ah->sl & 7) << 3);
4c3eb3ca 1187
fa417f7b
EC		 1188 if (!(ah->ah_flags & IB_AH_GRH))
1189 return -1;
1190
1191 err = mlx4_ib_resolve_grh(dev, ah, mac, &is_mcast, port);
1192 if (err)
1193 return err;
1194
1195 memcpy(path->dmac, mac, 6);
1196 path->ackto = MLX4_IB_LINK_TYPE_ETH;
1197 /* use index 0 into MAC table for IBoE */
1198 path->grh_mylmc &= 0x80;
4c3eb3ca
EC		 1199
1200 vlan_tag = rdma_get_vlan_id(&dev->iboe.gid_table[port - 1][ah->grh.sgid_index]);
1201 if (vlan_tag < 0x1000) {
1202 if (mlx4_find_cached_vlan(dev->dev, port, vlan_tag, &vidx))
1203 return -ENOENT;
1204
1205 path->vlan_index = vidx;
1206 path->fl = 1 << 6;
1207 }
1208 } else
1209 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
1210 ((port - 1) << 6) | ((ah->sl & 0xf) << 2);
fa417f7b 1211
225c7b1f
RD		 1212 return 0;
1213}
1214
fa417f7b
EC		 1215static void update_mcg_macs(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
1216{
1217 struct mlx4_ib_gid_entry *ge, *tmp;
1218
1219 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
1220 if (!ge->added && mlx4_ib_add_mc(dev, qp, &ge->gid)) {
1221 ge->added = 1;
1222 ge->port = qp->port;
1223 }
1224 }
1225}
1226
65adfa91
MT		 1227static int __mlx4_ib_modify_qp(struct ib_qp *ibqp,
1228 const struct ib_qp_attr *attr, int attr_mask,
1229 enum ib_qp_state cur_state, enum ib_qp_state new_state)
225c7b1f
RD		 1230{
1231 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
1232 struct mlx4_ib_qp *qp = to_mqp(ibqp);
0a1405da
SH		 1233 struct mlx4_ib_pd *pd;
1234 struct mlx4_ib_cq *send_cq, *recv_cq;
225c7b1f
RD		 1235 struct mlx4_qp_context *context;
1236 enum mlx4_qp_optpar optpar = 0;
225c7b1f
RD		 1237 int sqd_event;
1238 int err = -EINVAL;
1239
1240 context = kzalloc(sizeof *context, GFP_KERNEL);
1241 if (!context)
1242 return -ENOMEM;
1243
225c7b1f 1244 context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) |
1ffeb2eb 1245 (to_mlx4_st(dev, qp->mlx4_ib_qp_type) << 16));
225c7b1f
RD		 1246
1247 if (!(attr_mask & IB_QP_PATH_MIG_STATE))
1248 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
1249 else {
1250 optpar |= MLX4_QP_OPTPAR_PM_STATE;
1251 switch (attr->path_mig_state) {
1252 case IB_MIG_MIGRATED:
1253 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
1254 break;
1255 case IB_MIG_REARM:
1256 context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11);
1257 break;
1258 case IB_MIG_ARMED:
1259 context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11);
1260 break;
1261 }
1262 }
1263
b832be1e 1264 if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI)
225c7b1f 1265 context->mtu_msgmax = (IB_MTU_4096 << 5) | 11;
3987a2d3
OG		 1266 else if (ibqp->qp_type == IB_QPT_RAW_PACKET)
1267 context->mtu_msgmax = (MLX4_RAW_QP_MTU << 5) | MLX4_RAW_QP_MSGMAX;
b832be1e
EC		 1268 else if (ibqp->qp_type == IB_QPT_UD) {
1269 if (qp->flags & MLX4_IB_QP_LSO)
1270 context->mtu_msgmax = (IB_MTU_4096 << 5) |
1271 ilog2(dev->dev->caps.max_gso_sz);
1272 else
6e0d733d 1273 context->mtu_msgmax = (IB_MTU_4096 << 5) | 12;
b832be1e 1274 } else if (attr_mask & IB_QP_PATH_MTU) {
225c7b1f 1275 if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) {
987c8f8f 1276 pr_err("path MTU (%u) is invalid\n",
225c7b1f 1277 attr->path_mtu);
f5b40431 1278 goto out;
225c7b1f 1279 }
d1f2cd89
EC		 1280 context->mtu_msgmax = (attr->path_mtu << 5) |
1281 ilog2(dev->dev->caps.max_msg_sz);
225c7b1f
RD		 1282 }
1283
0e6e7416
RD		 1284 if (qp->rq.wqe_cnt)
1285 context->rq_size_stride = ilog2(qp->rq.wqe_cnt) << 3;
225c7b1f
RD		 1286 context->rq_size_stride |= qp->rq.wqe_shift - 4;
1287
0e6e7416
RD		 1288 if (qp->sq.wqe_cnt)
1289 context->sq_size_stride = ilog2(qp->sq.wqe_cnt) << 3;
225c7b1f
RD		 1290 context->sq_size_stride |= qp->sq.wqe_shift - 4;
1291
0a1405da 1292 if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
0e6e7416 1293 context->sq_size_stride |= !!qp->sq_no_prefetch << 7;
0a1405da 1294 context->xrcd = cpu_to_be32((u32) qp->xrcdn);
02d7ef6f
DB		 1295 if (ibqp->qp_type == IB_QPT_RAW_PACKET)
1296 context->param3 |= cpu_to_be32(1 << 30);
0a1405da 1297 }
0e6e7416 1298
225c7b1f
RD		 1299 if (qp->ibqp.uobject)
1300 context->usr_page = cpu_to_be32(to_mucontext(ibqp->uobject->context)->uar.index);
1301 else
1302 context->usr_page = cpu_to_be32(dev->priv_uar.index);
1303
1304 if (attr_mask & IB_QP_DEST_QPN)
1305 context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
1306
1307 if (attr_mask & IB_QP_PORT) {
1308 if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD &&
1309 !(attr_mask & IB_QP_AV)) {
1310 mlx4_set_sched(&context->pri_path, attr->port_num);
1311 optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE;
1312 }
1313 }
1314
cfcde11c
OG		 1315 if (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) {
1316 if (dev->counters[qp->port - 1] != -1) {
1317 context->pri_path.counter_index =
1318 dev->counters[qp->port - 1];
1319 optpar |= MLX4_QP_OPTPAR_COUNTER_INDEX;
1320 } else
1321 context->pri_path.counter_index = 0xff;
1322 }
1323
225c7b1f 1324 if (attr_mask & IB_QP_PKEY_INDEX) {
1ffeb2eb
JM		 1325 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1326 context->pri_path.disable_pkey_check = 0x40;
225c7b1f
RD		 1327 context->pri_path.pkey_index = attr->pkey_index;
1328 optpar |= MLX4_QP_OPTPAR_PKEY_INDEX;
1329 }
1330
225c7b1f
RD		 1331 if (attr_mask & IB_QP_AV) {
1332 if (mlx4_set_path(dev, &attr->ah_attr, &context->pri_path,
1ffeb2eb
JM		 1333 attr_mask & IB_QP_PORT ?
1334 attr->port_num : qp->port))
225c7b1f 1335 goto out;
225c7b1f
RD		 1336
1337 optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH |
1338 MLX4_QP_OPTPAR_SCHED_QUEUE);
1339 }
1340
1341 if (attr_mask & IB_QP_TIMEOUT) {
fa417f7b 1342 context->pri_path.ackto |= attr->timeout << 3;
225c7b1f
RD		 1343 optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT;
1344 }
1345
1346 if (attr_mask & IB_QP_ALT_PATH) {
225c7b1f
RD		 1347 if (attr->alt_port_num == 0 ||
1348 attr->alt_port_num > dev->dev->caps.num_ports)
f5b40431 1349 goto out;
225c7b1f 1350
5ae2a7a8
RD		 1351 if (attr->alt_pkey_index >=
1352 dev->dev->caps.pkey_table_len[attr->alt_port_num])
f5b40431 1353 goto out;
5ae2a7a8 1354
225c7b1f
RD		 1355 if (mlx4_set_path(dev, &attr->alt_ah_attr, &context->alt_path,
1356 attr->alt_port_num))
f5b40431 1357 goto out;
225c7b1f
RD		 1358
1359 context->alt_path.pkey_index = attr->alt_pkey_index;
1360 context->alt_path.ackto = attr->alt_timeout << 3;
1361 optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH;
1362 }
1363
0a1405da
SH		 1364 pd = get_pd(qp);
1365 get_cqs(qp, &send_cq, &recv_cq);
1366 context->pd = cpu_to_be32(pd->pdn);
1367 context->cqn_send = cpu_to_be32(send_cq->mcq.cqn);
1368 context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn);
1369 context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28);
57f01b53 1370
95d04f07
RD		 1371 /* Set "fast registration enabled" for all kernel QPs */
1372 if (!qp->ibqp.uobject)
1373 context->params1 |= cpu_to_be32(1 << 11);
1374
57f01b53
JM		 1375 if (attr_mask & IB_QP_RNR_RETRY) {
1376 context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
1377 optpar |= MLX4_QP_OPTPAR_RNR_RETRY;
1378 }
1379
225c7b1f
RD		 1380 if (attr_mask & IB_QP_RETRY_CNT) {
1381 context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
1382 optpar |= MLX4_QP_OPTPAR_RETRY_COUNT;
1383 }
1384
1385 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1386 if (attr->max_rd_atomic)
1387 context->params1 |=
1388 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
1389 optpar |= MLX4_QP_OPTPAR_SRA_MAX;
1390 }
1391
1392 if (attr_mask & IB_QP_SQ_PSN)
1393 context->next_send_psn = cpu_to_be32(attr->sq_psn);
1394
225c7b1f
RD		 1395 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1396 if (attr->max_dest_rd_atomic)
1397 context->params2 |=
1398 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
1399 optpar |= MLX4_QP_OPTPAR_RRA_MAX;
1400 }
1401
1402 if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) {
1403 context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask);
1404 optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE;
1405 }
1406
1407 if (ibqp->srq)
1408 context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC);
1409
1410 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
1411 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
1412 optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT;
1413 }
1414 if (attr_mask & IB_QP_RQ_PSN)
1415 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
1416
1ffeb2eb 1417 /* proxy and tunnel qp qkeys will be changed in modify-qp wrappers */
225c7b1f 1418 if (attr_mask & IB_QP_QKEY) {
1ffeb2eb
JM		 1419 if (qp->mlx4_ib_qp_type &
1420 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))
1421 context->qkey = cpu_to_be32(IB_QP_SET_QKEY);
1422 else {
1423 if (mlx4_is_mfunc(dev->dev) &&
1424 !(qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) &&
1425 (attr->qkey & MLX4_RESERVED_QKEY_MASK) ==
1426 MLX4_RESERVED_QKEY_BASE) {
1427 pr_err("Cannot use reserved QKEY"
1428 " 0x%x (range 0xffff0000..0xffffffff"
1429 " is reserved)\n", attr->qkey);
1430 err = -EINVAL;
1431 goto out;
1432 }
1433 context->qkey = cpu_to_be32(attr->qkey);
1434 }
225c7b1f
RD		 1435 optpar |= MLX4_QP_OPTPAR_Q_KEY;
1436 }
1437
1438 if (ibqp->srq)
1439 context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn);
1440
0a1405da 1441 if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
225c7b1f
RD		 1442 context->db_rec_addr = cpu_to_be64(qp->db.dma);
1443
1444 if (cur_state == IB_QPS_INIT &&
1445 new_state == IB_QPS_RTR &&
1446 (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
3987a2d3
OG		 1447 ibqp->qp_type == IB_QPT_UD ||
1448 ibqp->qp_type == IB_QPT_RAW_PACKET)) {
225c7b1f 1449 context->pri_path.sched_queue = (qp->port - 1) << 6;
1ffeb2eb
JM		 1450 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
1451 qp->mlx4_ib_qp_type &
1452 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) {
225c7b1f 1453 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE;
1ffeb2eb
JM		 1454 if (qp->mlx4_ib_qp_type != MLX4_IB_QPT_SMI)
1455 context->pri_path.fl = 0x80;
1456 } else {
1457 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1458 context->pri_path.fl = 0x80;
225c7b1f 1459 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE;
1ffeb2eb 1460 }
225c7b1f
RD		 1461 }
1462
3528f696
EC		 1463 if (qp->ibqp.qp_type == IB_QPT_RAW_PACKET)
1464 context->pri_path.ackto = (context->pri_path.ackto & 0xf8) |
1465 MLX4_IB_LINK_TYPE_ETH;
1466
225c7b1f
RD		 1467 if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD &&
1468 attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
1469 sqd_event = 1;
1470 else
1471 sqd_event = 0;
1472
d57f5f72
VS		 1473 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1474 context->rlkey |= (1 << 4);
1475
c0be5fb5
EC		 1476 /*
1477 * Before passing a kernel QP to the HW, make sure that the
0e6e7416
RD		 1478 * ownership bits of the send queue are set and the SQ
1479 * headroom is stamped so that the hardware doesn't start
1480 * processing stale work requests.
c0be5fb5
EC		 1481 */
1482 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
1483 struct mlx4_wqe_ctrl_seg *ctrl;
1484 int i;
1485
0e6e7416 1486 for (i = 0; i < qp->sq.wqe_cnt; ++i) {
c0be5fb5
EC		 1487 ctrl = get_send_wqe(qp, i);
1488 ctrl->owner_opcode = cpu_to_be32(1 << 31);
9670e553
EC		 1489 if (qp->sq_max_wqes_per_wr == 1)
1490 ctrl->fence_size = 1 << (qp->sq.wqe_shift - 4);
0e6e7416 1491
ea54b10c 1492 stamp_send_wqe(qp, i, 1 << qp->sq.wqe_shift);
c0be5fb5
EC		 1493 }
1494 }
1495
225c7b1f
RD		 1496 err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state),
1497 to_mlx4_state(new_state), context, optpar,
1498 sqd_event, &qp->mqp);
1499 if (err)
1500 goto out;
1501
1502 qp->state = new_state;
1503
1504 if (attr_mask & IB_QP_ACCESS_FLAGS)
1505 qp->atomic_rd_en = attr->qp_access_flags;
1506 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1507 qp->resp_depth = attr->max_dest_rd_atomic;
fa417f7b 1508 if (attr_mask & IB_QP_PORT) {
225c7b1f 1509 qp->port = attr->port_num;
fa417f7b
EC		 1510 update_mcg_macs(dev, qp);
1511 }
225c7b1f
RD		 1512 if (attr_mask & IB_QP_ALT_PATH)
1513 qp->alt_port = attr->alt_port_num;
1514
1515 if (is_sqp(dev, qp))
1516 store_sqp_attrs(to_msqp(qp), attr, attr_mask);
1517
1518 /*
1519 * If we moved QP0 to RTR, bring the IB link up; if we moved
1520 * QP0 to RESET or ERROR, bring the link back down.
1521 */
1522 if (is_qp0(dev, qp)) {
1523 if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR)
5ae2a7a8 1524 if (mlx4_INIT_PORT(dev->dev, qp->port))
987c8f8f 1525 pr_warn("INIT_PORT failed for port %d\n",
5ae2a7a8 1526 qp->port);
225c7b1f
RD		 1527
1528 if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR &&
1529 (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR))
1530 mlx4_CLOSE_PORT(dev->dev, qp->port);
1531 }
1532
1533 /*
1534 * If we moved a kernel QP to RESET, clean up all old CQ
1535 * entries and reinitialize the QP.
1536 */
1537 if (new_state == IB_QPS_RESET && !ibqp->uobject) {
0a1405da 1538 mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
225c7b1f 1539 ibqp->srq ? to_msrq(ibqp->srq): NULL);
0a1405da
SH		 1540 if (send_cq != recv_cq)
1541 mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
225c7b1f
RD		 1542
1543 qp->rq.head = 0;
1544 qp->rq.tail = 0;
1545 qp->sq.head = 0;
1546 qp->sq.tail = 0;
ea54b10c 1547 qp->sq_next_wqe = 0;
0a1405da 1548 if (qp->rq.wqe_cnt)
02d89b87 1549 *qp->db.db = 0;
225c7b1f
RD		 1550 }
1551
1552out:
225c7b1f
RD		 1553 kfree(context);
1554 return err;
1555}
1556
65adfa91
MT		 1557int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1558 int attr_mask, struct ib_udata *udata)
1559{
1560 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
1561 struct mlx4_ib_qp *qp = to_mqp(ibqp);
1562 enum ib_qp_state cur_state, new_state;
1563 int err = -EINVAL;
dd5f03be 1564 int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
65adfa91
MT		 1565 mutex_lock(&qp->mutex);
1566
1567 cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
1568 new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
1569
dd5f03be
MB		 1570 if (cur_state == new_state && cur_state == IB_QPS_RESET)
1571 p = IB_LINK_LAYER_UNSPECIFIED;
1572
1573 if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
1574 attr_mask,
1575 rdma_port_get_link_layer(&dev->ib_dev, p))) {
b1d8eb5a
JM		 1576 pr_debug("qpn 0x%x: invalid attribute mask specified "
1577 "for transition %d to %d. qp_type %d,"
1578 " attr_mask 0x%x\n",
1579 ibqp->qp_num, cur_state, new_state,
1580 ibqp->qp_type, attr_mask);
65adfa91 1581 goto out;
b1d8eb5a 1582 }
65adfa91 1583
65adfa91 1584 if ((attr_mask & IB_QP_PORT) &&
1ffeb2eb 1585 (attr->port_num == 0 || attr->port_num > dev->num_ports)) {
b1d8eb5a
JM		 1586 pr_debug("qpn 0x%x: invalid port number (%d) specified "
1587 "for transition %d to %d. qp_type %d\n",
1588 ibqp->qp_num, attr->port_num, cur_state,
1589 new_state, ibqp->qp_type);
65adfa91
MT		 1590 goto out;
1591 }
1592
3987a2d3
OG		 1593 if ((attr_mask & IB_QP_PORT) && (ibqp->qp_type == IB_QPT_RAW_PACKET) &&
1594 (rdma_port_get_link_layer(&dev->ib_dev, attr->port_num) !=
1595 IB_LINK_LAYER_ETHERNET))
1596 goto out;
1597
5ae2a7a8
RD		 1598 if (attr_mask & IB_QP_PKEY_INDEX) {
1599 int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
b1d8eb5a
JM		 1600 if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) {
1601 pr_debug("qpn 0x%x: invalid pkey index (%d) specified "
1602 "for transition %d to %d. qp_type %d\n",
1603 ibqp->qp_num, attr->pkey_index, cur_state,
1604 new_state, ibqp->qp_type);
5ae2a7a8 1605 goto out;
b1d8eb5a 1606 }
5ae2a7a8
RD		 1607 }
1608
65adfa91
MT		 1609 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
1610 attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) {
b1d8eb5a
JM		 1611 pr_debug("qpn 0x%x: max_rd_atomic (%d) too large. "
1612 "Transition %d to %d. qp_type %d\n",
1613 ibqp->qp_num, attr->max_rd_atomic, cur_state,
1614 new_state, ibqp->qp_type);
65adfa91
MT		 1615 goto out;
1616 }
1617
1618 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
1619 attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) {
b1d8eb5a
JM		 1620 pr_debug("qpn 0x%x: max_dest_rd_atomic (%d) too large. "
1621 "Transition %d to %d. qp_type %d\n",
1622 ibqp->qp_num, attr->max_dest_rd_atomic, cur_state,
1623 new_state, ibqp->qp_type);
65adfa91
MT		 1624 goto out;
1625 }
1626
1627 if (cur_state == new_state && cur_state == IB_QPS_RESET) {
1628 err = 0;
1629 goto out;
1630 }
1631
65adfa91
MT		 1632 err = __mlx4_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state);
1633
1634out:
1635 mutex_unlock(&qp->mutex);
1636 return err;
1637}
1638
1ffeb2eb
JM		 1639static int build_sriov_qp0_header(struct mlx4_ib_sqp *sqp,
1640 struct ib_send_wr *wr,
1641 void *wqe, unsigned *mlx_seg_len)
1642{
1643 struct mlx4_ib_dev *mdev = to_mdev(sqp->qp.ibqp.device);
1644 struct ib_device *ib_dev = &mdev->ib_dev;
1645 struct mlx4_wqe_mlx_seg *mlx = wqe;
1646 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
1647 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
1648 u16 pkey;
1649 u32 qkey;
1650 int send_size;
1651 int header_size;
1652 int spc;
1653 int i;
1654
1655 if (wr->opcode != IB_WR_SEND)
1656 return -EINVAL;
1657
1658 send_size = 0;
1659
1660 for (i = 0; i < wr->num_sge; ++i)
1661 send_size += wr->sg_list[i].length;
1662
1663 /* for proxy-qp0 sends, need to add in size of tunnel header */
1664 /* for tunnel-qp0 sends, tunnel header is already in s/g list */
1665 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER)
1666 send_size += sizeof (struct mlx4_ib_tunnel_header);
1667
1668 ib_ud_header_init(send_size, 1, 0, 0, 0, 0, &sqp->ud_header);
1669
1670 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) {
1671 sqp->ud_header.lrh.service_level =
1672 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
1673 sqp->ud_header.lrh.destination_lid =
1674 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
1675 sqp->ud_header.lrh.source_lid =
1676 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
1677 }
1678
1679 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
1680
1681 /* force loopback */
1682 mlx->flags |= cpu_to_be32(MLX4_WQE_MLX_VL15 | 0x1 | MLX4_WQE_MLX_SLR);
1683 mlx->rlid = sqp->ud_header.lrh.destination_lid;
1684
1685 sqp->ud_header.lrh.virtual_lane = 0;
1686 sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
1687 ib_get_cached_pkey(ib_dev, sqp->qp.port, 0, &pkey);
1688 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
1689 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_TUN_SMI_OWNER)
1690 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
1691 else
1692 sqp->ud_header.bth.destination_qpn =
47605df9 1693 cpu_to_be32(mdev->dev->caps.qp0_tunnel[sqp->qp.port - 1]);
1ffeb2eb
JM		 1694
1695 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
1696 if (mlx4_get_parav_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
1697 return -EINVAL;
1698 sqp->ud_header.deth.qkey = cpu_to_be32(qkey);
1699 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.mqp.qpn);
1700
1701 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
1702 sqp->ud_header.immediate_present = 0;
1703
1704 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
1705
1706 /*
1707 * Inline data segments may not cross a 64 byte boundary. If
1708 * our UD header is bigger than the space available up to the
1709 * next 64 byte boundary in the WQE, use two inline data
1710 * segments to hold the UD header.
1711 */
1712 spc = MLX4_INLINE_ALIGN -
1713 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
1714 if (header_size <= spc) {
1715 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
1716 memcpy(inl + 1, sqp->header_buf, header_size);
1717 i = 1;
1718 } else {
1719 inl->byte_count = cpu_to_be32(1 << 31 | spc);
1720 memcpy(inl + 1, sqp->header_buf, spc);
1721
1722 inl = (void *) (inl + 1) + spc;
1723 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
1724 /*
1725 * Need a barrier here to make sure all the data is
1726 * visible before the byte_count field is set.
1727 * Otherwise the HCA prefetcher could grab the 64-byte
1728 * chunk with this inline segment and get a valid (!=
1729 * 0xffffffff) byte count but stale data, and end up
1730 * generating a packet with bad headers.
1731 *
1732 * The first inline segment's byte_count field doesn't
1733 * need a barrier, because it comes after a
1734 * control/MLX segment and therefore is at an offset
1735 * of 16 mod 64.
1736 */
1737 wmb();
1738 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
1739 i = 2;
1740 }
1741
1742 *mlx_seg_len =
1743 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
1744 return 0;
1745}
1746
225c7b1f 1747static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
f438000f 1748 void *wqe, unsigned *mlx_seg_len)
225c7b1f 1749{
a478868a 1750 struct ib_device *ib_dev = sqp->qp.ibqp.device;
225c7b1f
RD		 1751 struct mlx4_wqe_mlx_seg *mlx = wqe;
1752 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
1753 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
a0675a38 1754 struct net_device *ndev;
4c3eb3ca 1755 union ib_gid sgid;
225c7b1f
RD		 1756 u16 pkey;
1757 int send_size;
1758 int header_size;
e61ef241 1759 int spc;
225c7b1f 1760 int i;
1ffeb2eb 1761 int err = 0;
57d88cff 1762 u16 vlan = 0xffff;
a29bec12
RD		 1763 bool is_eth;
1764 bool is_vlan = false;
1765 bool is_grh;
225c7b1f
RD		 1766
1767 send_size = 0;
1768 for (i = 0; i < wr->num_sge; ++i)
1769 send_size += wr->sg_list[i].length;
1770
fa417f7b
EC		 1771 is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET;
1772 is_grh = mlx4_ib_ah_grh_present(ah);
4c3eb3ca 1773 if (is_eth) {
1ffeb2eb
JM		 1774 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
1775 /* When multi-function is enabled, the ib_core gid
1776 * indexes don't necessarily match the hw ones, so
1777 * we must use our own cache */
1778 sgid.global.subnet_prefix =
1779 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
1780 subnet_prefix;
1781 sgid.global.interface_id =
1782 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
1783 guid_cache[ah->av.ib.gid_index];
1784 } else {
1785 err = ib_get_cached_gid(ib_dev,
1786 be32_to_cpu(ah->av.ib.port_pd) >> 24,
1787 ah->av.ib.gid_index, &sgid);
1788 if (err)
1789 return err;
1790 }
1791
4c3eb3ca
EC		 1792 vlan = rdma_get_vlan_id(&sgid);
1793 is_vlan = vlan < 0x1000;
1794 }
1795 ib_ud_header_init(send_size, !is_eth, is_eth, is_vlan, is_grh, 0, &sqp->ud_header);
fa417f7b
EC		 1796
1797 if (!is_eth) {
1798 sqp->ud_header.lrh.service_level =
1799 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
1800 sqp->ud_header.lrh.destination_lid = ah->av.ib.dlid;
1801 sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f);
1802 }
225c7b1f 1803
fa417f7b 1804 if (is_grh) {
225c7b1f 1805 sqp->ud_header.grh.traffic_class =
fa417f7b 1806 (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff;
225c7b1f 1807 sqp->ud_header.grh.flow_label =
fa417f7b
EC		 1808 ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
1809 sqp->ud_header.grh.hop_limit = ah->av.ib.hop_limit;
1ffeb2eb
JM		 1810 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
1811 /* When multi-function is enabled, the ib_core gid
1812 * indexes don't necessarily match the hw ones, so
1813 * we must use our own cache */
1814 sqp->ud_header.grh.source_gid.global.subnet_prefix =
1815 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
1816 subnet_prefix;
1817 sqp->ud_header.grh.source_gid.global.interface_id =
1818 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
1819 guid_cache[ah->av.ib.gid_index];
1820 } else
1821 ib_get_cached_gid(ib_dev,
1822 be32_to_cpu(ah->av.ib.port_pd) >> 24,
1823 ah->av.ib.gid_index,
1824 &sqp->ud_header.grh.source_gid);
225c7b1f 1825 memcpy(sqp->ud_header.grh.destination_gid.raw,
fa417f7b 1826 ah->av.ib.dgid, 16);
225c7b1f
RD		 1827 }
1828
1829 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
fa417f7b
EC		 1830
1831 if (!is_eth) {
1832 mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) |
1833 (sqp->ud_header.lrh.destination_lid ==
1834 IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) |
1835 (sqp->ud_header.lrh.service_level << 8));
1ffeb2eb
JM		 1836 if (ah->av.ib.port_pd & cpu_to_be32(0x80000000))
1837 mlx->flags |= cpu_to_be32(0x1); /* force loopback */
fa417f7b
EC		 1838 mlx->rlid = sqp->ud_header.lrh.destination_lid;
1839 }
225c7b1f
RD		 1840
1841 switch (wr->opcode) {
1842 case IB_WR_SEND:
1843 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
1844 sqp->ud_header.immediate_present = 0;
1845 break;
1846 case IB_WR_SEND_WITH_IMM:
1847 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
1848 sqp->ud_header.immediate_present = 1;
0f39cf3d 1849 sqp->ud_header.immediate_data = wr->ex.imm_data;
225c7b1f
RD		 1850 break;
1851 default:
1852 return -EINVAL;
1853 }
1854
fa417f7b
EC		 1855 if (is_eth) {
1856 u8 *smac;
c0c1d3d7
OD		 1857 u16 pcp = (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 29) << 13;
1858
1859 mlx->sched_prio = cpu_to_be16(pcp);
fa417f7b
EC		 1860
1861 memcpy(sqp->ud_header.eth.dmac_h, ah->av.eth.mac, 6);
1862 /* FIXME: cache smac value? */
a0675a38
KSS		 1863 ndev = to_mdev(sqp->qp.ibqp.device)->iboe.netdevs[sqp->qp.port - 1];
1864 if (!ndev)
1865 return -ENODEV;
1866 smac = ndev->dev_addr;
fa417f7b
EC		 1867 memcpy(sqp->ud_header.eth.smac_h, smac, 6);
1868 if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6))
1869 mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
4c3eb3ca
EC		 1870 if (!is_vlan) {
1871 sqp->ud_header.eth.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
1872 } else {
4c3eb3ca 1873 sqp->ud_header.vlan.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
4c3eb3ca
EC		 1874 sqp->ud_header.vlan.tag = cpu_to_be16(vlan | pcp);
1875 }
fa417f7b
EC		 1876 } else {
1877 sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0;
1878 if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
1879 sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
1880 }
225c7b1f
RD		 1881 sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
1882 if (!sqp->qp.ibqp.qp_num)
1883 ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey);
1884 else
1885 ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey);
1886 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
1887 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
1888 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
1889 sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
1890 sqp->qkey : wr->wr.ud.remote_qkey);
1891 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
1892
1893 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
1894
1895 if (0) {
987c8f8f 1896 pr_err("built UD header of size %d:\n", header_size);
225c7b1f
RD		 1897 for (i = 0; i < header_size / 4; ++i) {
1898 if (i % 8 == 0)
987c8f8f
SP		 1899 pr_err(" [%02x] ", i * 4);
1900 pr_cont(" %08x",
1901 be32_to_cpu(((__be32 *) sqp->header_buf)[i]));
225c7b1f 1902 if ((i + 1) % 8 == 0)
987c8f8f 1903 pr_cont("\n");
225c7b1f 1904 }
987c8f8f 1905 pr_err("\n");
225c7b1f
RD		 1906 }
1907
e61ef241
RD		 1908 /*
1909 * Inline data segments may not cross a 64 byte boundary. If
1910 * our UD header is bigger than the space available up to the
1911 * next 64 byte boundary in the WQE, use two inline data
1912 * segments to hold the UD header.
1913 */
1914 spc = MLX4_INLINE_ALIGN -
1915 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
1916 if (header_size <= spc) {
1917 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
1918 memcpy(inl + 1, sqp->header_buf, header_size);
1919 i = 1;
1920 } else {
1921 inl->byte_count = cpu_to_be32(1 << 31 | spc);
1922 memcpy(inl + 1, sqp->header_buf, spc);
1923
1924 inl = (void *) (inl + 1) + spc;
1925 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
1926 /*
1927 * Need a barrier here to make sure all the data is
1928 * visible before the byte_count field is set.
1929 * Otherwise the HCA prefetcher could grab the 64-byte
1930 * chunk with this inline segment and get a valid (!=
1931 * 0xffffffff) byte count but stale data, and end up
1932 * generating a packet with bad headers.
1933 *
1934 * The first inline segment's byte_count field doesn't
1935 * need a barrier, because it comes after a
1936 * control/MLX segment and therefore is at an offset
1937 * of 16 mod 64.
1938 */
1939 wmb();
1940 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
1941 i = 2;
1942 }
225c7b1f 1943
f438000f
RD		 1944 *mlx_seg_len =
1945 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
1946 return 0;
225c7b1f
RD		 1947}
1948
1949static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
1950{
1951 unsigned cur;
1952 struct mlx4_ib_cq *cq;
1953
1954 cur = wq->head - wq->tail;
0e6e7416 1955 if (likely(cur + nreq < wq->max_post))
225c7b1f
RD		 1956 return 0;
1957
1958 cq = to_mcq(ib_cq);
1959 spin_lock(&cq->lock);
1960 cur = wq->head - wq->tail;
1961 spin_unlock(&cq->lock);
1962
0e6e7416 1963 return cur + nreq >= wq->max_post;
225c7b1f
RD		 1964}
1965
95d04f07
RD		 1966static __be32 convert_access(int acc)
1967{
6ff63e19
SM		 1968 return (acc & IB_ACCESS_REMOTE_ATOMIC ?
1969 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC) : 0) |
1970 (acc & IB_ACCESS_REMOTE_WRITE ?
1971 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE) : 0) |
1972 (acc & IB_ACCESS_REMOTE_READ ?
1973 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ) : 0) |
95d04f07
RD		 1974 (acc & IB_ACCESS_LOCAL_WRITE ? cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_WRITE) : 0) |
1975 cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_READ);
1976}
1977
1978static void set_fmr_seg(struct mlx4_wqe_fmr_seg *fseg, struct ib_send_wr *wr)
1979{
1980 struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(wr->wr.fast_reg.page_list);
29bdc883
VS		 1981 int i;
1982
1983 for (i = 0; i < wr->wr.fast_reg.page_list_len; ++i)
2b6b7d4b 1984 mfrpl->mapped_page_list[i] =
29bdc883
VS		 1985 cpu_to_be64(wr->wr.fast_reg.page_list->page_list[i] |
1986 MLX4_MTT_FLAG_PRESENT);
95d04f07
RD		 1987
1988 fseg->flags = convert_access(wr->wr.fast_reg.access_flags);
1989 fseg->mem_key = cpu_to_be32(wr->wr.fast_reg.rkey);
1990 fseg->buf_list = cpu_to_be64(mfrpl->map);
1991 fseg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start);
1992 fseg->reg_len = cpu_to_be64(wr->wr.fast_reg.length);
1993 fseg->offset = 0; /* XXX -- is this just for ZBVA? */
1994 fseg->page_size = cpu_to_be32(wr->wr.fast_reg.page_shift);
1995 fseg->reserved[0] = 0;
1996 fseg->reserved[1] = 0;
1997}
1998
6ff63e19
SM		 1999static void set_bind_seg(struct mlx4_wqe_bind_seg *bseg, struct ib_send_wr *wr)
2000{
2001 bseg->flags1 =
2002 convert_access(wr->wr.bind_mw.bind_info.mw_access_flags) &
2003 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ |
2004 MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE |
2005 MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC);
2006 bseg->flags2 = 0;
2007 if (wr->wr.bind_mw.mw->type == IB_MW_TYPE_2)
2008 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_TYPE_2);
2009 if (wr->wr.bind_mw.bind_info.mw_access_flags & IB_ZERO_BASED)
2010 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_ZERO_BASED);
2011 bseg->new_rkey = cpu_to_be32(wr->wr.bind_mw.rkey);
2012 bseg->lkey = cpu_to_be32(wr->wr.bind_mw.bind_info.mr->lkey);
2013 bseg->addr = cpu_to_be64(wr->wr.bind_mw.bind_info.addr);
2014 bseg->length = cpu_to_be64(wr->wr.bind_mw.bind_info.length);
2015}
2016
95d04f07
RD		 2017static void set_local_inv_seg(struct mlx4_wqe_local_inval_seg *iseg, u32 rkey)
2018{
aee38fad
SM		 2019 memset(iseg, 0, sizeof(*iseg));
2020 iseg->mem_key = cpu_to_be32(rkey);
95d04f07
RD		 2021}
2022
0fbfa6a9
RD		 2023static __always_inline void set_raddr_seg(struct mlx4_wqe_raddr_seg *rseg,
2024 u64 remote_addr, u32 rkey)
2025{
2026 rseg->raddr = cpu_to_be64(remote_addr);
2027 rseg->rkey = cpu_to_be32(rkey);
2028 rseg->reserved = 0;
2029}
2030
2031static void set_atomic_seg(struct mlx4_wqe_atomic_seg *aseg, struct ib_send_wr *wr)
2032{
2033 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
2034 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
2035 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
6fa8f719
VS		 2036 } else if (wr->opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) {
2037 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2038 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add_mask);
0fbfa6a9
RD		 2039 } else {
2040 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2041 aseg->compare = 0;
2042 }
2043
2044}
2045
6fa8f719
VS		 2046static void set_masked_atomic_seg(struct mlx4_wqe_masked_atomic_seg *aseg,
2047 struct ib_send_wr *wr)
2048{
2049 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
2050 aseg->swap_add_mask = cpu_to_be64(wr->wr.atomic.swap_mask);
2051 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
2052 aseg->compare_mask = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2053}
2054
0fbfa6a9 2055static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg,
80a2dcd8 2056 struct ib_send_wr *wr)
0fbfa6a9
RD		 2057{
2058 memcpy(dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av));
2059 dseg->dqpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2060 dseg->qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
fa417f7b
EC		 2061 dseg->vlan = to_mah(wr->wr.ud.ah)->av.eth.vlan;
2062 memcpy(dseg->mac, to_mah(wr->wr.ud.ah)->av.eth.mac, 6);
0fbfa6a9
RD		 2063}
2064
1ffeb2eb
JM		 2065static void set_tunnel_datagram_seg(struct mlx4_ib_dev *dev,
2066 struct mlx4_wqe_datagram_seg *dseg,
2067 struct ib_send_wr *wr, enum ib_qp_type qpt)
2068{
2069 union mlx4_ext_av *av = &to_mah(wr->wr.ud.ah)->av;
2070 struct mlx4_av sqp_av = {0};
2071 int port = *((u8 *) &av->ib.port_pd) & 0x3;
2072
2073 /* force loopback */
2074 sqp_av.port_pd = av->ib.port_pd | cpu_to_be32(0x80000000);
2075 sqp_av.g_slid = av->ib.g_slid & 0x7f; /* no GRH */
2076 sqp_av.sl_tclass_flowlabel = av->ib.sl_tclass_flowlabel &
2077 cpu_to_be32(0xf0000000);
2078
2079 memcpy(dseg->av, &sqp_av, sizeof (struct mlx4_av));
47605df9
JM		 2080 /* This function used only for sending on QP1 proxies */
2081 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp1_tunnel[port - 1]);
2082 /* Use QKEY from the QP context, which is set by master */
2083 dseg->qkey = cpu_to_be32(IB_QP_SET_QKEY);
1ffeb2eb
JM		 2084}
2085
2086static void build_tunnel_header(struct ib_send_wr *wr, void *wqe, unsigned *mlx_seg_len)
2087{
2088 struct mlx4_wqe_inline_seg *inl = wqe;
2089 struct mlx4_ib_tunnel_header hdr;
2090 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2091 int spc;
2092 int i;
2093
2094 memcpy(&hdr.av, &ah->av, sizeof hdr.av);
2095 hdr.remote_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2096 hdr.pkey_index = cpu_to_be16(wr->wr.ud.pkey_index);
2097 hdr.qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2098
2099 spc = MLX4_INLINE_ALIGN -
2100 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2101 if (sizeof (hdr) <= spc) {
2102 memcpy(inl + 1, &hdr, sizeof (hdr));
2103 wmb();
2104 inl->byte_count = cpu_to_be32(1 << 31 | sizeof (hdr));
2105 i = 1;
2106 } else {
2107 memcpy(inl + 1, &hdr, spc);
2108 wmb();
2109 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2110
2111 inl = (void *) (inl + 1) + spc;
2112 memcpy(inl + 1, (void *) &hdr + spc, sizeof (hdr) - spc);
2113 wmb();
2114 inl->byte_count = cpu_to_be32(1 << 31 | (sizeof (hdr) - spc));
2115 i = 2;
2116 }
2117
2118 *mlx_seg_len =
2119 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + sizeof (hdr), 16);
2120}
2121
6e694ea3
JM		 2122static void set_mlx_icrc_seg(void *dseg)
2123{
2124 u32 *t = dseg;
2125 struct mlx4_wqe_inline_seg *iseg = dseg;
2126
2127 t[1] = 0;
2128
2129 /*
2130 * Need a barrier here before writing the byte_count field to
2131 * make sure that all the data is visible before the
2132 * byte_count field is set. Otherwise, if the segment begins
2133 * a new cacheline, the HCA prefetcher could grab the 64-byte
2134 * chunk and get a valid (!= * 0xffffffff) byte count but
2135 * stale data, and end up sending the wrong data.
2136 */
2137 wmb();
2138
2139 iseg->byte_count = cpu_to_be32((1 << 31) | 4);
2140}
2141
2142static void set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
d420d9e3 2143{
d420d9e3
RD		 2144 dseg->lkey = cpu_to_be32(sg->lkey);
2145 dseg->addr = cpu_to_be64(sg->addr);
6e694ea3
JM		 2146
2147 /*
2148 * Need a barrier here before writing the byte_count field to
2149 * make sure that all the data is visible before the
2150 * byte_count field is set. Otherwise, if the segment begins
2151 * a new cacheline, the HCA prefetcher could grab the 64-byte
2152 * chunk and get a valid (!= * 0xffffffff) byte count but
2153 * stale data, and end up sending the wrong data.
2154 */
2155 wmb();
2156
2157 dseg->byte_count = cpu_to_be32(sg->length);
d420d9e3
RD		 2158}
2159
2242fa4f
RD		 2160static void __set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2161{
2162 dseg->byte_count = cpu_to_be32(sg->length);
2163 dseg->lkey = cpu_to_be32(sg->lkey);
2164 dseg->addr = cpu_to_be64(sg->addr);
2165}
2166
47b37475 2167static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe, struct ib_send_wr *wr,
0fd7e1d8 2168 struct mlx4_ib_qp *qp, unsigned *lso_seg_len,
417608c2 2169 __be32 *lso_hdr_sz, __be32 *blh)
b832be1e
EC		 2170{
2171 unsigned halign = ALIGN(sizeof *wqe + wr->wr.ud.hlen, 16);
2172
417608c2
EC		 2173 if (unlikely(halign > MLX4_IB_CACHE_LINE_SIZE))
2174 *blh = cpu_to_be32(1 << 6);
b832be1e
EC		 2175
2176 if (unlikely(!(qp->flags & MLX4_IB_QP_LSO) &&
2177 wr->num_sge > qp->sq.max_gs - (halign >> 4)))
2178 return -EINVAL;
2179
2180 memcpy(wqe->header, wr->wr.ud.header, wr->wr.ud.hlen);
2181
0fd7e1d8
RD		 2182 *lso_hdr_sz = cpu_to_be32((wr->wr.ud.mss - wr->wr.ud.hlen) << 16 |
2183 wr->wr.ud.hlen);
b832be1e
EC		 2184 *lso_seg_len = halign;
2185 return 0;
2186}
2187
95d04f07
RD		 2188static __be32 send_ieth(struct ib_send_wr *wr)
2189{
2190 switch (wr->opcode) {
2191 case IB_WR_SEND_WITH_IMM:
2192 case IB_WR_RDMA_WRITE_WITH_IMM:
2193 return wr->ex.imm_data;
2194
2195 case IB_WR_SEND_WITH_INV:
2196 return cpu_to_be32(wr->ex.invalidate_rkey);
2197
2198 default:
2199 return 0;
2200 }
2201}
2202
1ffeb2eb
JM		 2203static void add_zero_len_inline(void *wqe)
2204{
2205 struct mlx4_wqe_inline_seg *inl = wqe;
2206 memset(wqe, 0, 16);
2207 inl->byte_count = cpu_to_be32(1 << 31);
2208}
2209
225c7b1f
RD		 2210int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
2211 struct ib_send_wr **bad_wr)
2212{
2213 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2214 void *wqe;
2215 struct mlx4_wqe_ctrl_seg *ctrl;
6e694ea3 2216 struct mlx4_wqe_data_seg *dseg;
225c7b1f
RD		 2217 unsigned long flags;
2218 int nreq;
2219 int err = 0;
ea54b10c
JM		 2220 unsigned ind;
2221 int uninitialized_var(stamp);
2222 int uninitialized_var(size);
a3d8e159 2223 unsigned uninitialized_var(seglen);
0fd7e1d8
RD		 2224 __be32 dummy;
2225 __be32 *lso_wqe;
2226 __be32 uninitialized_var(lso_hdr_sz);
417608c2 2227 __be32 blh;
225c7b1f
RD		 2228 int i;
2229
96db0e03 2230 spin_lock_irqsave(&qp->sq.lock, flags);
225c7b1f 2231
ea54b10c 2232 ind = qp->sq_next_wqe;
225c7b1f
RD		 2233
2234 for (nreq = 0; wr; ++nreq, wr = wr->next) {
0fd7e1d8 2235 lso_wqe = &dummy;
417608c2 2236 blh = 0;
0fd7e1d8 2237
225c7b1f
RD		 2238 if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
2239 err = -ENOMEM;
2240 *bad_wr = wr;
2241 goto out;
2242 }
2243
2244 if (unlikely(wr->num_sge > qp->sq.max_gs)) {
2245 err = -EINVAL;
2246 *bad_wr = wr;
2247 goto out;
2248 }
2249
0e6e7416 2250 ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
ea54b10c 2251 qp->sq.wrid[(qp->sq.head + nreq) & (qp->sq.wqe_cnt - 1)] = wr->wr_id;
225c7b1f
RD		 2252
2253 ctrl->srcrb_flags =
2254 (wr->send_flags & IB_SEND_SIGNALED ?
2255 cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) |
2256 (wr->send_flags & IB_SEND_SOLICITED ?
2257 cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) |
8ff095ec
EC		 2258 ((wr->send_flags & IB_SEND_IP_CSUM) ?
2259 cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
2260 MLX4_WQE_CTRL_TCP_UDP_CSUM) : 0) |
225c7b1f
RD		 2261 qp->sq_signal_bits;
2262
95d04f07 2263 ctrl->imm = send_ieth(wr);
225c7b1f
RD		 2264
2265 wqe += sizeof *ctrl;
2266 size = sizeof *ctrl / 16;
2267
1ffeb2eb
JM		 2268 switch (qp->mlx4_ib_qp_type) {
2269 case MLX4_IB_QPT_RC:
2270 case MLX4_IB_QPT_UC:
225c7b1f
RD		 2271 switch (wr->opcode) {
2272 case IB_WR_ATOMIC_CMP_AND_SWP:
2273 case IB_WR_ATOMIC_FETCH_AND_ADD:
6fa8f719 2274 case IB_WR_MASKED_ATOMIC_FETCH_AND_ADD:
0fbfa6a9
RD		 2275 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2276 wr->wr.atomic.rkey);
225c7b1f
RD		 2277 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2278
0fbfa6a9 2279 set_atomic_seg(wqe, wr);
225c7b1f 2280 wqe += sizeof (struct mlx4_wqe_atomic_seg);
0fbfa6a9 2281
225c7b1f
RD		 2282 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2283 sizeof (struct mlx4_wqe_atomic_seg)) / 16;
6fa8f719
VS		 2284
2285 break;
2286
2287 case IB_WR_MASKED_ATOMIC_CMP_AND_SWP:
2288 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2289 wr->wr.atomic.rkey);
2290 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2291
2292 set_masked_atomic_seg(wqe, wr);
2293 wqe += sizeof (struct mlx4_wqe_masked_atomic_seg);
2294
2295 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2296 sizeof (struct mlx4_wqe_masked_atomic_seg)) / 16;
225c7b1f
RD		 2297
2298 break;
2299
2300 case IB_WR_RDMA_READ:
2301 case IB_WR_RDMA_WRITE:
2302 case IB_WR_RDMA_WRITE_WITH_IMM:
0fbfa6a9
RD		 2303 set_raddr_seg(wqe, wr->wr.rdma.remote_addr,
2304 wr->wr.rdma.rkey);
225c7b1f
RD		 2305 wqe += sizeof (struct mlx4_wqe_raddr_seg);
2306 size += sizeof (struct mlx4_wqe_raddr_seg) / 16;
225c7b1f 2307 break;
95d04f07
RD		 2308
2309 case IB_WR_LOCAL_INV:
2ac6bf4d
JM		 2310 ctrl->srcrb_flags |=
2311 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
95d04f07
RD		 2312 set_local_inv_seg(wqe, wr->ex.invalidate_rkey);
2313 wqe += sizeof (struct mlx4_wqe_local_inval_seg);
2314 size += sizeof (struct mlx4_wqe_local_inval_seg) / 16;
2315 break;
2316
2317 case IB_WR_FAST_REG_MR:
2ac6bf4d
JM		 2318 ctrl->srcrb_flags |=
2319 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
95d04f07
RD		 2320 set_fmr_seg(wqe, wr);
2321 wqe += sizeof (struct mlx4_wqe_fmr_seg);
2322 size += sizeof (struct mlx4_wqe_fmr_seg) / 16;
2323 break;
225c7b1f 2324
6ff63e19
SM		 2325 case IB_WR_BIND_MW:
2326 ctrl->srcrb_flags |=
2327 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2328 set_bind_seg(wqe, wr);
2329 wqe += sizeof(struct mlx4_wqe_bind_seg);
2330 size += sizeof(struct mlx4_wqe_bind_seg) / 16;
2331 break;
225c7b1f
RD		 2332 default:
2333 /* No extra segments required for sends */
2334 break;
2335 }
2336 break;
2337
1ffeb2eb
JM		 2338 case MLX4_IB_QPT_TUN_SMI_OWNER:
2339 err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2340 if (unlikely(err)) {
2341 *bad_wr = wr;
2342 goto out;
2343 }
2344 wqe += seglen;
2345 size += seglen / 16;
2346 break;
2347 case MLX4_IB_QPT_TUN_SMI:
2348 case MLX4_IB_QPT_TUN_GSI:
2349 /* this is a UD qp used in MAD responses to slaves. */
2350 set_datagram_seg(wqe, wr);
2351 /* set the forced-loopback bit in the data seg av */
2352 *(__be32 *) wqe |= cpu_to_be32(0x80000000);
2353 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2354 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2355 break;
2356 case MLX4_IB_QPT_UD:
80a2dcd8 2357 set_datagram_seg(wqe, wr);
225c7b1f
RD		 2358 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2359 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
b832be1e
EC		 2360
2361 if (wr->opcode == IB_WR_LSO) {
417608c2 2362 err = build_lso_seg(wqe, wr, qp, &seglen, &lso_hdr_sz, &blh);
b832be1e
EC		 2363 if (unlikely(err)) {
2364 *bad_wr = wr;
2365 goto out;
2366 }
0fd7e1d8 2367 lso_wqe = (__be32 *) wqe;
b832be1e
EC		 2368 wqe += seglen;
2369 size += seglen / 16;
2370 }
225c7b1f
RD		 2371 break;
2372
1ffeb2eb
JM		 2373 case MLX4_IB_QPT_PROXY_SMI_OWNER:
2374 if (unlikely(!mlx4_is_master(to_mdev(ibqp->device)->dev))) {
2375 err = -ENOSYS;
2376 *bad_wr = wr;
2377 goto out;
2378 }
2379 err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2380 if (unlikely(err)) {
2381 *bad_wr = wr;
2382 goto out;
2383 }
2384 wqe += seglen;
2385 size += seglen / 16;
2386 /* to start tunnel header on a cache-line boundary */
2387 add_zero_len_inline(wqe);
2388 wqe += 16;
2389 size++;
2390 build_tunnel_header(wr, wqe, &seglen);
2391 wqe += seglen;
2392 size += seglen / 16;
2393 break;
2394 case MLX4_IB_QPT_PROXY_SMI:
2395 /* don't allow QP0 sends on guests */
2396 err = -ENOSYS;
2397 *bad_wr = wr;
2398 goto out;
2399 case MLX4_IB_QPT_PROXY_GSI:
2400 /* If we are tunneling special qps, this is a UD qp.
2401 * In this case we first add a UD segment targeting
2402 * the tunnel qp, and then add a header with address
2403 * information */
2404 set_tunnel_datagram_seg(to_mdev(ibqp->device), wqe, wr, ibqp->qp_type);
2405 wqe += sizeof (struct mlx4_wqe_datagram_seg);
2406 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2407 build_tunnel_header(wr, wqe, &seglen);
2408 wqe += seglen;
2409 size += seglen / 16;
2410 break;
2411
2412 case MLX4_IB_QPT_SMI:
2413 case MLX4_IB_QPT_GSI:
f438000f
RD		 2414 err = build_mlx_header(to_msqp(qp), wr, ctrl, &seglen);
2415 if (unlikely(err)) {
225c7b1f
RD		 2416 *bad_wr = wr;
2417 goto out;
2418 }
f438000f
RD		 2419 wqe += seglen;
2420 size += seglen / 16;
225c7b1f
RD		 2421 break;
2422
2423 default:
2424 break;
2425 }
2426
6e694ea3
JM		 2427 /*
2428 * Write data segments in reverse order, so as to
2429 * overwrite cacheline stamp last within each
2430 * cacheline. This avoids issues with WQE
2431 * prefetching.
2432 */
225c7b1f 2433
6e694ea3
JM		 2434 dseg = wqe;
2435 dseg += wr->num_sge - 1;
2436 size += wr->num_sge * (sizeof (struct mlx4_wqe_data_seg) / 16);
225c7b1f
RD		 2437
2438 /* Add one more inline data segment for ICRC for MLX sends */
1ffeb2eb
JM		 2439 if (unlikely(qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
2440 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI ||
2441 qp->mlx4_ib_qp_type &
2442 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))) {
6e694ea3 2443 set_mlx_icrc_seg(dseg + 1);
225c7b1f
RD		 2444 size += sizeof (struct mlx4_wqe_data_seg) / 16;
2445 }
2446
6e694ea3
JM		 2447 for (i = wr->num_sge - 1; i >= 0; --i, --dseg)
2448 set_data_seg(dseg, wr->sg_list + i);
2449
0fd7e1d8
RD		 2450 /*
2451 * Possibly overwrite stamping in cacheline with LSO
2452 * segment only after making sure all data segments
2453 * are written.
2454 */
2455 wmb();
2456 *lso_wqe = lso_hdr_sz;
2457
225c7b1f
RD		 2458 ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ?
2459 MLX4_WQE_CTRL_FENCE : 0) | size;
2460
2461 /*
2462 * Make sure descriptor is fully written before
2463 * setting ownership bit (because HW can start
2464 * executing as soon as we do).
2465 */
2466 wmb();
2467
59b0ed12 2468 if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) {
4ba6b8ea 2469 *bad_wr = wr;
225c7b1f
RD		 2470 err = -EINVAL;
2471 goto out;
2472 }
2473
2474 ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] |
417608c2 2475 (ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0) | blh;
0e6e7416 2476
ea54b10c
JM		 2477 stamp = ind + qp->sq_spare_wqes;
2478 ind += DIV_ROUND_UP(size * 16, 1U << qp->sq.wqe_shift);
2479
0e6e7416
RD		 2480 /*
2481 * We can improve latency by not stamping the last
2482 * send queue WQE until after ringing the doorbell, so
2483 * only stamp here if there are still more WQEs to post.
ea54b10c
JM		 2484 *
2485 * Same optimization applies to padding with NOP wqe
2486 * in case of WQE shrinking (used to prevent wrap-around
2487 * in the middle of WR).
0e6e7416 2488 */
ea54b10c
JM		 2489 if (wr->next) {
2490 stamp_send_wqe(qp, stamp, size * 16);
2491 ind = pad_wraparound(qp, ind);
2492 }
225c7b1f
RD		 2493 }
2494
2495out:
2496 if (likely(nreq)) {
2497 qp->sq.head += nreq;
2498
2499 /*
2500 * Make sure that descriptors are written before
2501 * doorbell record.
2502 */
2503 wmb();
2504
2505 writel(qp->doorbell_qpn,
2506 to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL);
2507
2508 /*
2509 * Make sure doorbells don't leak out of SQ spinlock
2510 * and reach the HCA out of order.
2511 */
2512 mmiowb();
0e6e7416 2513
ea54b10c
JM		 2514 stamp_send_wqe(qp, stamp, size * 16);
2515
2516 ind = pad_wraparound(qp, ind);
2517 qp->sq_next_wqe = ind;
225c7b1f
RD		 2518 }
2519
96db0e03 2520 spin_unlock_irqrestore(&qp->sq.lock, flags);
225c7b1f
RD		 2521
2522 return err;
2523}
2524
2525int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
2526 struct ib_recv_wr **bad_wr)
2527{
2528 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2529 struct mlx4_wqe_data_seg *scat;
2530 unsigned long flags;
2531 int err = 0;
2532 int nreq;
2533 int ind;
1ffeb2eb 2534 int max_gs;
225c7b1f
RD		 2535 int i;
2536
1ffeb2eb 2537 max_gs = qp->rq.max_gs;
225c7b1f
RD		 2538 spin_lock_irqsave(&qp->rq.lock, flags);
2539
0e6e7416 2540 ind = qp->rq.head & (qp->rq.wqe_cnt - 1);
225c7b1f
RD		 2541
2542 for (nreq = 0; wr; ++nreq, wr = wr->next) {
2b946077 2543 if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
225c7b1f
RD		 2544 err = -ENOMEM;
2545 *bad_wr = wr;
2546 goto out;
2547 }
2548
2549 if (unlikely(wr->num_sge > qp->rq.max_gs)) {
2550 err = -EINVAL;
2551 *bad_wr = wr;
2552 goto out;
2553 }
2554
2555 scat = get_recv_wqe(qp, ind);
2556
1ffeb2eb
JM		 2557 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
2558 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
2559 ib_dma_sync_single_for_device(ibqp->device,
2560 qp->sqp_proxy_rcv[ind].map,
2561 sizeof (struct mlx4_ib_proxy_sqp_hdr),
2562 DMA_FROM_DEVICE);
2563 scat->byte_count =
2564 cpu_to_be32(sizeof (struct mlx4_ib_proxy_sqp_hdr));
2565 /* use dma lkey from upper layer entry */
2566 scat->lkey = cpu_to_be32(wr->sg_list->lkey);
2567 scat->addr = cpu_to_be64(qp->sqp_proxy_rcv[ind].map);
2568 scat++;
2569 max_gs--;
2570 }
2571
2242fa4f
RD		 2572 for (i = 0; i < wr->num_sge; ++i)
2573 __set_data_seg(scat + i, wr->sg_list + i);
225c7b1f 2574
1ffeb2eb 2575 if (i < max_gs) {
225c7b1f
RD		 2576 scat[i].byte_count = 0;
2577 scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY);
2578 scat[i].addr = 0;
2579 }
2580
2581 qp->rq.wrid[ind] = wr->wr_id;
2582
0e6e7416 2583 ind = (ind + 1) & (qp->rq.wqe_cnt - 1);
225c7b1f
RD		 2584 }
2585
2586out:
2587 if (likely(nreq)) {
2588 qp->rq.head += nreq;
2589
2590 /*
2591 * Make sure that descriptors are written before
2592 * doorbell record.
2593 */
2594 wmb();
2595
2596 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
2597 }
2598
2599 spin_unlock_irqrestore(&qp->rq.lock, flags);
2600
2601 return err;
2602}
6a775e2b
JM		 2603
2604static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state)
2605{
2606 switch (mlx4_state) {
2607 case MLX4_QP_STATE_RST: return IB_QPS_RESET;
2608 case MLX4_QP_STATE_INIT: return IB_QPS_INIT;
2609 case MLX4_QP_STATE_RTR: return IB_QPS_RTR;
2610 case MLX4_QP_STATE_RTS: return IB_QPS_RTS;
2611 case MLX4_QP_STATE_SQ_DRAINING:
2612 case MLX4_QP_STATE_SQD: return IB_QPS_SQD;
2613 case MLX4_QP_STATE_SQER: return IB_QPS_SQE;
2614 case MLX4_QP_STATE_ERR: return IB_QPS_ERR;
2615 default: return -1;
2616 }
2617}
2618
2619static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state)
2620{
2621 switch (mlx4_mig_state) {
2622 case MLX4_QP_PM_ARMED: return IB_MIG_ARMED;
2623 case MLX4_QP_PM_REARM: return IB_MIG_REARM;
2624 case MLX4_QP_PM_MIGRATED: return IB_MIG_MIGRATED;
2625 default: return -1;
2626 }
2627}
2628
2629static int to_ib_qp_access_flags(int mlx4_flags)
2630{
2631 int ib_flags = 0;
2632
2633 if (mlx4_flags & MLX4_QP_BIT_RRE)
2634 ib_flags |= IB_ACCESS_REMOTE_READ;
2635 if (mlx4_flags & MLX4_QP_BIT_RWE)
2636 ib_flags |= IB_ACCESS_REMOTE_WRITE;
2637 if (mlx4_flags & MLX4_QP_BIT_RAE)
2638 ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
2639
2640 return ib_flags;
2641}
2642
4c3eb3ca 2643static void to_ib_ah_attr(struct mlx4_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr,
6a775e2b
JM		 2644 struct mlx4_qp_path *path)
2645{
4c3eb3ca
EC		 2646 struct mlx4_dev *dev = ibdev->dev;
2647 int is_eth;
2648
8fcea95a 2649 memset(ib_ah_attr, 0, sizeof *ib_ah_attr);
6a775e2b
JM		 2650 ib_ah_attr->port_num = path->sched_queue & 0x40 ? 2 : 1;
2651
2652 if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports)
2653 return;
2654
4c3eb3ca
EC		 2655 is_eth = rdma_port_get_link_layer(&ibdev->ib_dev, ib_ah_attr->port_num) ==
2656 IB_LINK_LAYER_ETHERNET;
2657 if (is_eth)
2658 ib_ah_attr->sl = ((path->sched_queue >> 3) & 0x7) |
2659 ((path->sched_queue & 4) << 1);
2660 else
2661 ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf;
2662
6a775e2b 2663 ib_ah_attr->dlid = be16_to_cpu(path->rlid);
6a775e2b
JM		 2664 ib_ah_attr->src_path_bits = path->grh_mylmc & 0x7f;
2665 ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0;
2666 ib_ah_attr->ah_flags = (path->grh_mylmc & (1 << 7)) ? IB_AH_GRH : 0;
2667 if (ib_ah_attr->ah_flags) {
2668 ib_ah_attr->grh.sgid_index = path->mgid_index;
2669 ib_ah_attr->grh.hop_limit = path->hop_limit;
2670 ib_ah_attr->grh.traffic_class =
2671 (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff;
2672 ib_ah_attr->grh.flow_label =
586bb586 2673 be32_to_cpu(path->tclass_flowlabel) & 0xfffff;
6a775e2b
JM		 2674 memcpy(ib_ah_attr->grh.dgid.raw,
2675 path->rgid, sizeof ib_ah_attr->grh.dgid.raw);
2676 }
2677}
2678
2679int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
2680 struct ib_qp_init_attr *qp_init_attr)
2681{
2682 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
2683 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2684 struct mlx4_qp_context context;
2685 int mlx4_state;
0df67030
DB		 2686 int err = 0;
2687
2688 mutex_lock(&qp->mutex);
6a775e2b
JM		 2689
2690 if (qp->state == IB_QPS_RESET) {
2691 qp_attr->qp_state = IB_QPS_RESET;
2692 goto done;
2693 }
2694
2695 err = mlx4_qp_query(dev->dev, &qp->mqp, &context);
0df67030
DB		 2696 if (err) {
2697 err = -EINVAL;
2698 goto out;
2699 }
6a775e2b
JM		 2700
2701 mlx4_state = be32_to_cpu(context.flags) >> 28;
2702
0df67030
DB		 2703 qp->state = to_ib_qp_state(mlx4_state);
2704 qp_attr->qp_state = qp->state;
6a775e2b
JM		 2705 qp_attr->path_mtu = context.mtu_msgmax >> 5;
2706 qp_attr->path_mig_state =
2707 to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3);
2708 qp_attr->qkey = be32_to_cpu(context.qkey);
2709 qp_attr->rq_psn = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff;
2710 qp_attr->sq_psn = be32_to_cpu(context.next_send_psn) & 0xffffff;
2711 qp_attr->dest_qp_num = be32_to_cpu(context.remote_qpn) & 0xffffff;
2712 qp_attr->qp_access_flags =
2713 to_ib_qp_access_flags(be32_to_cpu(context.params2));
2714
2715 if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) {
4c3eb3ca
EC		 2716 to_ib_ah_attr(dev, &qp_attr->ah_attr, &context.pri_path);
2717 to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context.alt_path);
6a775e2b
JM		 2718 qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f;
2719 qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num;
2720 }
2721
2722 qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f;
1c27cb71
JM		 2723 if (qp_attr->qp_state == IB_QPS_INIT)
2724 qp_attr->port_num = qp->port;
2725 else
2726 qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1;
6a775e2b
JM		 2727
2728 /* qp_attr->en_sqd_async_notify is only applicable in modify qp */
2729 qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING;
2730
2731 qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7);
2732
2733 qp_attr->max_dest_rd_atomic =
2734 1 << ((be32_to_cpu(context.params2) >> 21) & 0x7);
2735 qp_attr->min_rnr_timer =
2736 (be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f;
2737 qp_attr->timeout = context.pri_path.ackto >> 3;
2738 qp_attr->retry_cnt = (be32_to_cpu(context.params1) >> 16) & 0x7;
2739 qp_attr->rnr_retry = (be32_to_cpu(context.params1) >> 13) & 0x7;
2740 qp_attr->alt_timeout = context.alt_path.ackto >> 3;
2741
2742done:
2743 qp_attr->cur_qp_state = qp_attr->qp_state;
7f5eb9bb
RD		 2744 qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt;
2745 qp_attr->cap.max_recv_sge = qp->rq.max_gs;
2746
6a775e2b 2747 if (!ibqp->uobject) {
7f5eb9bb
RD		 2748 qp_attr->cap.max_send_wr = qp->sq.wqe_cnt;
2749 qp_attr->cap.max_send_sge = qp->sq.max_gs;
2750 } else {
2751 qp_attr->cap.max_send_wr = 0;
2752 qp_attr->cap.max_send_sge = 0;
6a775e2b
JM		 2753 }
2754
7f5eb9bb
RD		 2755 /*
2756 * We don't support inline sends for kernel QPs (yet), and we
2757 * don't know what userspace's value should be.
2758 */
2759 qp_attr->cap.max_inline_data = 0;
2760
2761 qp_init_attr->cap = qp_attr->cap;
2762
521e575b
RL		 2763 qp_init_attr->create_flags = 0;
2764 if (qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK)
2765 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
2766
2767 if (qp->flags & MLX4_IB_QP_LSO)
2768 qp_init_attr->create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
2769
46db567d
DB		 2770 qp_init_attr->sq_sig_type =
2771 qp->sq_signal_bits == cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) ?
2772 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
2773
0df67030
DB		 2774out:
2775 mutex_unlock(&qp->mutex);
2776 return err;
6a775e2b
JM		 2777}
2778
Linux 6.x block layer and io_uring tree(s)