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225c7b1f RD |
1 | /* |
2 | * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | */ | |
32 | ||
33 | #include <rdma/ib_cache.h> | |
34 | #include <rdma/ib_pack.h> | |
35 | ||
36 | #include <linux/mlx4/qp.h> | |
37 | ||
38 | #include "mlx4_ib.h" | |
39 | #include "user.h" | |
40 | ||
41 | enum { | |
42 | MLX4_IB_ACK_REQ_FREQ = 8, | |
43 | }; | |
44 | ||
45 | enum { | |
46 | MLX4_IB_DEFAULT_SCHED_QUEUE = 0x83, | |
47 | MLX4_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f | |
48 | }; | |
49 | ||
50 | enum { | |
51 | /* | |
52 | * Largest possible UD header: send with GRH and immediate data. | |
53 | */ | |
54 | MLX4_IB_UD_HEADER_SIZE = 72 | |
55 | }; | |
56 | ||
57 | struct mlx4_ib_sqp { | |
58 | struct mlx4_ib_qp qp; | |
59 | int pkey_index; | |
60 | u32 qkey; | |
61 | u32 send_psn; | |
62 | struct ib_ud_header ud_header; | |
63 | u8 header_buf[MLX4_IB_UD_HEADER_SIZE]; | |
64 | }; | |
65 | ||
66 | static const __be32 mlx4_ib_opcode[] = { | |
67 | [IB_WR_SEND] = __constant_cpu_to_be32(MLX4_OPCODE_SEND), | |
68 | [IB_WR_SEND_WITH_IMM] = __constant_cpu_to_be32(MLX4_OPCODE_SEND_IMM), | |
69 | [IB_WR_RDMA_WRITE] = __constant_cpu_to_be32(MLX4_OPCODE_RDMA_WRITE), | |
70 | [IB_WR_RDMA_WRITE_WITH_IMM] = __constant_cpu_to_be32(MLX4_OPCODE_RDMA_WRITE_IMM), | |
71 | [IB_WR_RDMA_READ] = __constant_cpu_to_be32(MLX4_OPCODE_RDMA_READ), | |
72 | [IB_WR_ATOMIC_CMP_AND_SWP] = __constant_cpu_to_be32(MLX4_OPCODE_ATOMIC_CS), | |
73 | [IB_WR_ATOMIC_FETCH_AND_ADD] = __constant_cpu_to_be32(MLX4_OPCODE_ATOMIC_FA), | |
74 | }; | |
75 | ||
76 | static struct mlx4_ib_sqp *to_msqp(struct mlx4_ib_qp *mqp) | |
77 | { | |
78 | return container_of(mqp, struct mlx4_ib_sqp, qp); | |
79 | } | |
80 | ||
81 | static int is_sqp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) | |
82 | { | |
83 | return qp->mqp.qpn >= dev->dev->caps.sqp_start && | |
84 | qp->mqp.qpn <= dev->dev->caps.sqp_start + 3; | |
85 | } | |
86 | ||
87 | static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) | |
88 | { | |
89 | return qp->mqp.qpn >= dev->dev->caps.sqp_start && | |
90 | qp->mqp.qpn <= dev->dev->caps.sqp_start + 1; | |
91 | } | |
92 | ||
93 | static void *get_wqe(struct mlx4_ib_qp *qp, int offset) | |
94 | { | |
95 | if (qp->buf.nbufs == 1) | |
96 | return qp->buf.u.direct.buf + offset; | |
97 | else | |
98 | return qp->buf.u.page_list[offset >> PAGE_SHIFT].buf + | |
99 | (offset & (PAGE_SIZE - 1)); | |
100 | } | |
101 | ||
102 | static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n) | |
103 | { | |
104 | return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift)); | |
105 | } | |
106 | ||
107 | static void *get_send_wqe(struct mlx4_ib_qp *qp, int n) | |
108 | { | |
109 | return get_wqe(qp, qp->sq.offset + (n << qp->sq.wqe_shift)); | |
110 | } | |
111 | ||
112 | static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type) | |
113 | { | |
114 | struct ib_event event; | |
115 | struct ib_qp *ibqp = &to_mibqp(qp)->ibqp; | |
116 | ||
117 | if (type == MLX4_EVENT_TYPE_PATH_MIG) | |
118 | to_mibqp(qp)->port = to_mibqp(qp)->alt_port; | |
119 | ||
120 | if (ibqp->event_handler) { | |
121 | event.device = ibqp->device; | |
122 | event.element.qp = ibqp; | |
123 | switch (type) { | |
124 | case MLX4_EVENT_TYPE_PATH_MIG: | |
125 | event.event = IB_EVENT_PATH_MIG; | |
126 | break; | |
127 | case MLX4_EVENT_TYPE_COMM_EST: | |
128 | event.event = IB_EVENT_COMM_EST; | |
129 | break; | |
130 | case MLX4_EVENT_TYPE_SQ_DRAINED: | |
131 | event.event = IB_EVENT_SQ_DRAINED; | |
132 | break; | |
133 | case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE: | |
134 | event.event = IB_EVENT_QP_LAST_WQE_REACHED; | |
135 | break; | |
136 | case MLX4_EVENT_TYPE_WQ_CATAS_ERROR: | |
137 | event.event = IB_EVENT_QP_FATAL; | |
138 | break; | |
139 | case MLX4_EVENT_TYPE_PATH_MIG_FAILED: | |
140 | event.event = IB_EVENT_PATH_MIG_ERR; | |
141 | break; | |
142 | case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR: | |
143 | event.event = IB_EVENT_QP_REQ_ERR; | |
144 | break; | |
145 | case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR: | |
146 | event.event = IB_EVENT_QP_ACCESS_ERR; | |
147 | break; | |
148 | default: | |
149 | printk(KERN_WARNING "mlx4_ib: Unexpected event type %d " | |
150 | "on QP %06x\n", type, qp->qpn); | |
151 | return; | |
152 | } | |
153 | ||
154 | ibqp->event_handler(&event, ibqp->qp_context); | |
155 | } | |
156 | } | |
157 | ||
158 | static int send_wqe_overhead(enum ib_qp_type type) | |
159 | { | |
160 | /* | |
161 | * UD WQEs must have a datagram segment. | |
162 | * RC and UC WQEs might have a remote address segment. | |
163 | * MLX WQEs need two extra inline data segments (for the UD | |
164 | * header and space for the ICRC). | |
165 | */ | |
166 | switch (type) { | |
167 | case IB_QPT_UD: | |
168 | return sizeof (struct mlx4_wqe_ctrl_seg) + | |
169 | sizeof (struct mlx4_wqe_datagram_seg); | |
170 | case IB_QPT_UC: | |
171 | return sizeof (struct mlx4_wqe_ctrl_seg) + | |
172 | sizeof (struct mlx4_wqe_raddr_seg); | |
173 | case IB_QPT_RC: | |
174 | return sizeof (struct mlx4_wqe_ctrl_seg) + | |
175 | sizeof (struct mlx4_wqe_atomic_seg) + | |
176 | sizeof (struct mlx4_wqe_raddr_seg); | |
177 | case IB_QPT_SMI: | |
178 | case IB_QPT_GSI: | |
179 | return sizeof (struct mlx4_wqe_ctrl_seg) + | |
180 | ALIGN(MLX4_IB_UD_HEADER_SIZE + | |
181 | sizeof (struct mlx4_wqe_inline_seg), | |
182 | sizeof (struct mlx4_wqe_data_seg)) + | |
183 | ALIGN(4 + | |
184 | sizeof (struct mlx4_wqe_inline_seg), | |
185 | sizeof (struct mlx4_wqe_data_seg)); | |
186 | default: | |
187 | return sizeof (struct mlx4_wqe_ctrl_seg); | |
188 | } | |
189 | } | |
190 | ||
2446304d EC |
191 | static int set_rq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap, |
192 | struct mlx4_ib_qp *qp) | |
225c7b1f | 193 | { |
2446304d EC |
194 | /* Sanity check RQ size before proceeding */ |
195 | if (cap->max_recv_wr > dev->dev->caps.max_wqes || | |
196 | cap->max_recv_sge > dev->dev->caps.max_rq_sg) | |
197 | return -EINVAL; | |
198 | ||
199 | qp->rq.max = cap->max_recv_wr ? roundup_pow_of_two(cap->max_recv_wr) : 0; | |
200 | ||
201 | qp->rq.wqe_shift = ilog2(roundup_pow_of_two(cap->max_recv_sge * | |
202 | sizeof (struct mlx4_wqe_data_seg))); | |
203 | qp->rq.max_gs = (1 << qp->rq.wqe_shift) / sizeof (struct mlx4_wqe_data_seg); | |
204 | ||
205 | cap->max_recv_wr = qp->rq.max; | |
206 | cap->max_recv_sge = qp->rq.max_gs; | |
207 | ||
208 | return 0; | |
209 | } | |
210 | ||
211 | static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap, | |
212 | enum ib_qp_type type, struct mlx4_ib_qp *qp) | |
213 | { | |
214 | /* Sanity check SQ size before proceeding */ | |
225c7b1f | 215 | if (cap->max_send_wr > dev->dev->caps.max_wqes || |
225c7b1f | 216 | cap->max_send_sge > dev->dev->caps.max_sq_sg || |
225c7b1f RD |
217 | cap->max_inline_data + send_wqe_overhead(type) + |
218 | sizeof (struct mlx4_wqe_inline_seg) > dev->dev->caps.max_sq_desc_sz) | |
219 | return -EINVAL; | |
220 | ||
221 | /* | |
222 | * For MLX transport we need 2 extra S/G entries: | |
223 | * one for the header and one for the checksum at the end | |
224 | */ | |
225 | if ((type == IB_QPT_SMI || type == IB_QPT_GSI) && | |
226 | cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg) | |
227 | return -EINVAL; | |
228 | ||
2446304d | 229 | qp->sq.max = cap->max_send_wr ? roundup_pow_of_two(cap->max_send_wr) : 1; |
225c7b1f RD |
230 | |
231 | qp->sq.wqe_shift = ilog2(roundup_pow_of_two(max(cap->max_send_sge * | |
232 | sizeof (struct mlx4_wqe_data_seg), | |
233 | cap->max_inline_data + | |
234 | sizeof (struct mlx4_wqe_inline_seg)) + | |
235 | send_wqe_overhead(type))); | |
236 | qp->sq.max_gs = ((1 << qp->sq.wqe_shift) - send_wqe_overhead(type)) / | |
237 | sizeof (struct mlx4_wqe_data_seg); | |
238 | ||
239 | qp->buf_size = (qp->rq.max << qp->rq.wqe_shift) + | |
240 | (qp->sq.max << qp->sq.wqe_shift); | |
241 | if (qp->rq.wqe_shift > qp->sq.wqe_shift) { | |
242 | qp->rq.offset = 0; | |
243 | qp->sq.offset = qp->rq.max << qp->rq.wqe_shift; | |
244 | } else { | |
245 | qp->rq.offset = qp->sq.max << qp->sq.wqe_shift; | |
246 | qp->sq.offset = 0; | |
247 | } | |
248 | ||
2446304d EC |
249 | cap->max_send_wr = qp->sq.max; |
250 | cap->max_send_sge = qp->sq.max_gs; | |
225c7b1f RD |
251 | cap->max_inline_data = (1 << qp->sq.wqe_shift) - send_wqe_overhead(type) - |
252 | sizeof (struct mlx4_wqe_inline_seg); | |
253 | ||
254 | return 0; | |
255 | } | |
256 | ||
2446304d EC |
257 | static int set_user_sq_size(struct mlx4_ib_qp *qp, |
258 | struct mlx4_ib_create_qp *ucmd) | |
259 | { | |
260 | qp->sq.max = 1 << ucmd->log_sq_bb_count; | |
261 | qp->sq.wqe_shift = ucmd->log_sq_stride; | |
262 | ||
263 | qp->buf_size = (qp->rq.max << qp->rq.wqe_shift) + | |
264 | (qp->sq.max << qp->sq.wqe_shift); | |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
225c7b1f RD |
269 | static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd, |
270 | struct ib_qp_init_attr *init_attr, | |
271 | struct ib_udata *udata, int sqpn, struct mlx4_ib_qp *qp) | |
272 | { | |
225c7b1f | 273 | int err; |
225c7b1f RD |
274 | |
275 | mutex_init(&qp->mutex); | |
276 | spin_lock_init(&qp->sq.lock); | |
277 | spin_lock_init(&qp->rq.lock); | |
278 | ||
279 | qp->state = IB_QPS_RESET; | |
280 | qp->atomic_rd_en = 0; | |
281 | qp->resp_depth = 0; | |
282 | ||
283 | qp->rq.head = 0; | |
284 | qp->rq.tail = 0; | |
285 | qp->sq.head = 0; | |
286 | qp->sq.tail = 0; | |
287 | ||
2446304d | 288 | err = set_rq_size(dev, &init_attr->cap, qp); |
225c7b1f RD |
289 | if (err) |
290 | goto err; | |
291 | ||
292 | if (pd->uobject) { | |
293 | struct mlx4_ib_create_qp ucmd; | |
294 | ||
295 | if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) { | |
296 | err = -EFAULT; | |
297 | goto err; | |
298 | } | |
299 | ||
2446304d EC |
300 | err = set_user_sq_size(qp, &ucmd); |
301 | if (err) | |
302 | goto err; | |
303 | ||
225c7b1f RD |
304 | qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr, |
305 | qp->buf_size, 0); | |
306 | if (IS_ERR(qp->umem)) { | |
307 | err = PTR_ERR(qp->umem); | |
308 | goto err; | |
309 | } | |
310 | ||
311 | err = mlx4_mtt_init(dev->dev, ib_umem_page_count(qp->umem), | |
312 | ilog2(qp->umem->page_size), &qp->mtt); | |
313 | if (err) | |
314 | goto err_buf; | |
315 | ||
316 | err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem); | |
317 | if (err) | |
318 | goto err_mtt; | |
319 | ||
02d89b87 RD |
320 | if (!init_attr->srq) { |
321 | err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context), | |
322 | ucmd.db_addr, &qp->db); | |
323 | if (err) | |
324 | goto err_mtt; | |
325 | } | |
225c7b1f | 326 | } else { |
2446304d EC |
327 | err = set_kernel_sq_size(dev, &init_attr->cap, init_attr->qp_type, qp); |
328 | if (err) | |
329 | goto err; | |
330 | ||
02d89b87 RD |
331 | if (!init_attr->srq) { |
332 | err = mlx4_ib_db_alloc(dev, &qp->db, 0); | |
333 | if (err) | |
334 | goto err; | |
225c7b1f | 335 | |
02d89b87 RD |
336 | *qp->db.db = 0; |
337 | } | |
225c7b1f RD |
338 | |
339 | if (mlx4_buf_alloc(dev->dev, qp->buf_size, PAGE_SIZE * 2, &qp->buf)) { | |
340 | err = -ENOMEM; | |
341 | goto err_db; | |
342 | } | |
343 | ||
344 | err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift, | |
345 | &qp->mtt); | |
346 | if (err) | |
347 | goto err_buf; | |
348 | ||
349 | err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf); | |
350 | if (err) | |
351 | goto err_mtt; | |
352 | ||
225c7b1f RD |
353 | qp->sq.wrid = kmalloc(qp->sq.max * sizeof (u64), GFP_KERNEL); |
354 | qp->rq.wrid = kmalloc(qp->rq.max * sizeof (u64), GFP_KERNEL); | |
355 | ||
356 | if (!qp->sq.wrid || !qp->rq.wrid) { | |
357 | err = -ENOMEM; | |
358 | goto err_wrid; | |
359 | } | |
360 | ||
361 | /* We don't support inline sends for kernel QPs (yet) */ | |
362 | init_attr->cap.max_inline_data = 0; | |
363 | } | |
364 | ||
365 | err = mlx4_qp_alloc(dev->dev, sqpn, &qp->mqp); | |
366 | if (err) | |
367 | goto err_wrid; | |
368 | ||
369 | /* | |
370 | * Hardware wants QPN written in big-endian order (after | |
371 | * shifting) for send doorbell. Precompute this value to save | |
372 | * a little bit when posting sends. | |
373 | */ | |
374 | qp->doorbell_qpn = swab32(qp->mqp.qpn << 8); | |
375 | ||
376 | if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) | |
377 | qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE); | |
378 | else | |
379 | qp->sq_signal_bits = 0; | |
380 | ||
381 | qp->mqp.event = mlx4_ib_qp_event; | |
382 | ||
383 | return 0; | |
384 | ||
385 | err_wrid: | |
02d89b87 | 386 | if (pd->uobject && !init_attr->srq) |
225c7b1f RD |
387 | mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db); |
388 | else { | |
389 | kfree(qp->sq.wrid); | |
390 | kfree(qp->rq.wrid); | |
391 | } | |
392 | ||
393 | err_mtt: | |
394 | mlx4_mtt_cleanup(dev->dev, &qp->mtt); | |
395 | ||
396 | err_buf: | |
397 | if (pd->uobject) | |
398 | ib_umem_release(qp->umem); | |
399 | else | |
400 | mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf); | |
401 | ||
402 | err_db: | |
02d89b87 | 403 | if (!pd->uobject && !init_attr->srq) |
225c7b1f RD |
404 | mlx4_ib_db_free(dev, &qp->db); |
405 | ||
406 | err: | |
407 | return err; | |
408 | } | |
409 | ||
410 | static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state) | |
411 | { | |
412 | switch (state) { | |
413 | case IB_QPS_RESET: return MLX4_QP_STATE_RST; | |
414 | case IB_QPS_INIT: return MLX4_QP_STATE_INIT; | |
415 | case IB_QPS_RTR: return MLX4_QP_STATE_RTR; | |
416 | case IB_QPS_RTS: return MLX4_QP_STATE_RTS; | |
417 | case IB_QPS_SQD: return MLX4_QP_STATE_SQD; | |
418 | case IB_QPS_SQE: return MLX4_QP_STATE_SQER; | |
419 | case IB_QPS_ERR: return MLX4_QP_STATE_ERR; | |
420 | default: return -1; | |
421 | } | |
422 | } | |
423 | ||
424 | static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq) | |
425 | { | |
426 | if (send_cq == recv_cq) | |
427 | spin_lock_irq(&send_cq->lock); | |
428 | else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) { | |
429 | spin_lock_irq(&send_cq->lock); | |
430 | spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING); | |
431 | } else { | |
432 | spin_lock_irq(&recv_cq->lock); | |
433 | spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING); | |
434 | } | |
435 | } | |
436 | ||
437 | static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq) | |
438 | { | |
439 | if (send_cq == recv_cq) | |
440 | spin_unlock_irq(&send_cq->lock); | |
441 | else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) { | |
442 | spin_unlock(&recv_cq->lock); | |
443 | spin_unlock_irq(&send_cq->lock); | |
444 | } else { | |
445 | spin_unlock(&send_cq->lock); | |
446 | spin_unlock_irq(&recv_cq->lock); | |
447 | } | |
448 | } | |
449 | ||
450 | static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp, | |
451 | int is_user) | |
452 | { | |
453 | struct mlx4_ib_cq *send_cq, *recv_cq; | |
454 | ||
455 | if (qp->state != IB_QPS_RESET) | |
456 | if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state), | |
457 | MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp)) | |
458 | printk(KERN_WARNING "mlx4_ib: modify QP %06x to RESET failed.\n", | |
459 | qp->mqp.qpn); | |
460 | ||
461 | send_cq = to_mcq(qp->ibqp.send_cq); | |
462 | recv_cq = to_mcq(qp->ibqp.recv_cq); | |
463 | ||
464 | mlx4_ib_lock_cqs(send_cq, recv_cq); | |
465 | ||
466 | if (!is_user) { | |
467 | __mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn, | |
468 | qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL); | |
469 | if (send_cq != recv_cq) | |
470 | __mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL); | |
471 | } | |
472 | ||
473 | mlx4_qp_remove(dev->dev, &qp->mqp); | |
474 | ||
475 | mlx4_ib_unlock_cqs(send_cq, recv_cq); | |
476 | ||
477 | mlx4_qp_free(dev->dev, &qp->mqp); | |
478 | mlx4_mtt_cleanup(dev->dev, &qp->mtt); | |
479 | ||
480 | if (is_user) { | |
02d89b87 RD |
481 | if (!qp->ibqp.srq) |
482 | mlx4_ib_db_unmap_user(to_mucontext(qp->ibqp.uobject->context), | |
483 | &qp->db); | |
225c7b1f RD |
484 | ib_umem_release(qp->umem); |
485 | } else { | |
486 | kfree(qp->sq.wrid); | |
487 | kfree(qp->rq.wrid); | |
488 | mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf); | |
02d89b87 RD |
489 | if (!qp->ibqp.srq) |
490 | mlx4_ib_db_free(dev, &qp->db); | |
225c7b1f RD |
491 | } |
492 | } | |
493 | ||
494 | struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd, | |
495 | struct ib_qp_init_attr *init_attr, | |
496 | struct ib_udata *udata) | |
497 | { | |
498 | struct mlx4_ib_dev *dev = to_mdev(pd->device); | |
499 | struct mlx4_ib_sqp *sqp; | |
500 | struct mlx4_ib_qp *qp; | |
501 | int err; | |
502 | ||
503 | switch (init_attr->qp_type) { | |
504 | case IB_QPT_RC: | |
505 | case IB_QPT_UC: | |
506 | case IB_QPT_UD: | |
507 | { | |
508 | qp = kmalloc(sizeof *qp, GFP_KERNEL); | |
509 | if (!qp) | |
510 | return ERR_PTR(-ENOMEM); | |
511 | ||
512 | err = create_qp_common(dev, pd, init_attr, udata, 0, qp); | |
513 | if (err) { | |
514 | kfree(qp); | |
515 | return ERR_PTR(err); | |
516 | } | |
517 | ||
518 | qp->ibqp.qp_num = qp->mqp.qpn; | |
519 | ||
520 | break; | |
521 | } | |
522 | case IB_QPT_SMI: | |
523 | case IB_QPT_GSI: | |
524 | { | |
525 | /* Userspace is not allowed to create special QPs: */ | |
526 | if (pd->uobject) | |
527 | return ERR_PTR(-EINVAL); | |
528 | ||
529 | sqp = kmalloc(sizeof *sqp, GFP_KERNEL); | |
530 | if (!sqp) | |
531 | return ERR_PTR(-ENOMEM); | |
532 | ||
533 | qp = &sqp->qp; | |
534 | ||
535 | err = create_qp_common(dev, pd, init_attr, udata, | |
536 | dev->dev->caps.sqp_start + | |
537 | (init_attr->qp_type == IB_QPT_SMI ? 0 : 2) + | |
538 | init_attr->port_num - 1, | |
539 | qp); | |
540 | if (err) { | |
541 | kfree(sqp); | |
542 | return ERR_PTR(err); | |
543 | } | |
544 | ||
545 | qp->port = init_attr->port_num; | |
546 | qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1; | |
547 | ||
548 | break; | |
549 | } | |
550 | default: | |
551 | /* Don't support raw QPs */ | |
552 | return ERR_PTR(-EINVAL); | |
553 | } | |
554 | ||
555 | return &qp->ibqp; | |
556 | } | |
557 | ||
558 | int mlx4_ib_destroy_qp(struct ib_qp *qp) | |
559 | { | |
560 | struct mlx4_ib_dev *dev = to_mdev(qp->device); | |
561 | struct mlx4_ib_qp *mqp = to_mqp(qp); | |
562 | ||
563 | if (is_qp0(dev, mqp)) | |
564 | mlx4_CLOSE_PORT(dev->dev, mqp->port); | |
565 | ||
566 | destroy_qp_common(dev, mqp, !!qp->pd->uobject); | |
567 | ||
568 | if (is_sqp(dev, mqp)) | |
569 | kfree(to_msqp(mqp)); | |
570 | else | |
571 | kfree(mqp); | |
572 | ||
573 | return 0; | |
574 | } | |
575 | ||
576 | static void init_port(struct mlx4_ib_dev *dev, int port) | |
577 | { | |
578 | struct mlx4_init_port_param param; | |
579 | int err; | |
580 | ||
581 | memset(¶m, 0, sizeof param); | |
582 | ||
583 | param.port_width_cap = dev->dev->caps.port_width_cap; | |
584 | param.vl_cap = dev->dev->caps.vl_cap; | |
585 | param.mtu = ib_mtu_enum_to_int(dev->dev->caps.mtu_cap); | |
586 | param.max_gid = dev->dev->caps.gid_table_len; | |
587 | param.max_pkey = dev->dev->caps.pkey_table_len; | |
588 | ||
589 | err = mlx4_INIT_PORT(dev->dev, ¶m, port); | |
590 | if (err) | |
591 | printk(KERN_WARNING "INIT_PORT failed, return code %d.\n", err); | |
592 | } | |
593 | ||
594 | static int to_mlx4_st(enum ib_qp_type type) | |
595 | { | |
596 | switch (type) { | |
597 | case IB_QPT_RC: return MLX4_QP_ST_RC; | |
598 | case IB_QPT_UC: return MLX4_QP_ST_UC; | |
599 | case IB_QPT_UD: return MLX4_QP_ST_UD; | |
600 | case IB_QPT_SMI: | |
601 | case IB_QPT_GSI: return MLX4_QP_ST_MLX; | |
602 | default: return -1; | |
603 | } | |
604 | } | |
605 | ||
65adfa91 | 606 | static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, const struct ib_qp_attr *attr, |
225c7b1f RD |
607 | int attr_mask) |
608 | { | |
609 | u8 dest_rd_atomic; | |
610 | u32 access_flags; | |
611 | u32 hw_access_flags = 0; | |
612 | ||
613 | if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) | |
614 | dest_rd_atomic = attr->max_dest_rd_atomic; | |
615 | else | |
616 | dest_rd_atomic = qp->resp_depth; | |
617 | ||
618 | if (attr_mask & IB_QP_ACCESS_FLAGS) | |
619 | access_flags = attr->qp_access_flags; | |
620 | else | |
621 | access_flags = qp->atomic_rd_en; | |
622 | ||
623 | if (!dest_rd_atomic) | |
624 | access_flags &= IB_ACCESS_REMOTE_WRITE; | |
625 | ||
626 | if (access_flags & IB_ACCESS_REMOTE_READ) | |
627 | hw_access_flags |= MLX4_QP_BIT_RRE; | |
628 | if (access_flags & IB_ACCESS_REMOTE_ATOMIC) | |
629 | hw_access_flags |= MLX4_QP_BIT_RAE; | |
630 | if (access_flags & IB_ACCESS_REMOTE_WRITE) | |
631 | hw_access_flags |= MLX4_QP_BIT_RWE; | |
632 | ||
633 | return cpu_to_be32(hw_access_flags); | |
634 | } | |
635 | ||
65adfa91 | 636 | static void store_sqp_attrs(struct mlx4_ib_sqp *sqp, const struct ib_qp_attr *attr, |
225c7b1f RD |
637 | int attr_mask) |
638 | { | |
639 | if (attr_mask & IB_QP_PKEY_INDEX) | |
640 | sqp->pkey_index = attr->pkey_index; | |
641 | if (attr_mask & IB_QP_QKEY) | |
642 | sqp->qkey = attr->qkey; | |
643 | if (attr_mask & IB_QP_SQ_PSN) | |
644 | sqp->send_psn = attr->sq_psn; | |
645 | } | |
646 | ||
647 | static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port) | |
648 | { | |
649 | path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6); | |
650 | } | |
651 | ||
65adfa91 | 652 | static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah, |
225c7b1f RD |
653 | struct mlx4_qp_path *path, u8 port) |
654 | { | |
655 | path->grh_mylmc = ah->src_path_bits & 0x7f; | |
656 | path->rlid = cpu_to_be16(ah->dlid); | |
657 | if (ah->static_rate) { | |
658 | path->static_rate = ah->static_rate + MLX4_STAT_RATE_OFFSET; | |
659 | while (path->static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET && | |
660 | !(1 << path->static_rate & dev->dev->caps.stat_rate_support)) | |
661 | --path->static_rate; | |
662 | } else | |
663 | path->static_rate = 0; | |
664 | path->counter_index = 0xff; | |
665 | ||
666 | if (ah->ah_flags & IB_AH_GRH) { | |
667 | if (ah->grh.sgid_index >= dev->dev->caps.gid_table_len) { | |
668 | printk(KERN_ERR "sgid_index (%u) too large. max is %d\n", | |
669 | ah->grh.sgid_index, dev->dev->caps.gid_table_len - 1); | |
670 | return -1; | |
671 | } | |
672 | ||
673 | path->grh_mylmc |= 1 << 7; | |
674 | path->mgid_index = ah->grh.sgid_index; | |
675 | path->hop_limit = ah->grh.hop_limit; | |
676 | path->tclass_flowlabel = | |
677 | cpu_to_be32((ah->grh.traffic_class << 20) | | |
678 | (ah->grh.flow_label)); | |
679 | memcpy(path->rgid, ah->grh.dgid.raw, 16); | |
680 | } | |
681 | ||
682 | path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | | |
683 | ((port - 1) << 6) | ((ah->sl & 0xf) << 2); | |
684 | ||
685 | return 0; | |
686 | } | |
687 | ||
65adfa91 MT |
688 | static int __mlx4_ib_modify_qp(struct ib_qp *ibqp, |
689 | const struct ib_qp_attr *attr, int attr_mask, | |
690 | enum ib_qp_state cur_state, enum ib_qp_state new_state) | |
225c7b1f RD |
691 | { |
692 | struct mlx4_ib_dev *dev = to_mdev(ibqp->device); | |
693 | struct mlx4_ib_qp *qp = to_mqp(ibqp); | |
694 | struct mlx4_qp_context *context; | |
695 | enum mlx4_qp_optpar optpar = 0; | |
225c7b1f RD |
696 | int sqd_event; |
697 | int err = -EINVAL; | |
698 | ||
699 | context = kzalloc(sizeof *context, GFP_KERNEL); | |
700 | if (!context) | |
701 | return -ENOMEM; | |
702 | ||
225c7b1f RD |
703 | context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) | |
704 | (to_mlx4_st(ibqp->qp_type) << 16)); | |
705 | context->flags |= cpu_to_be32(1 << 8); /* DE? */ | |
706 | ||
707 | if (!(attr_mask & IB_QP_PATH_MIG_STATE)) | |
708 | context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11); | |
709 | else { | |
710 | optpar |= MLX4_QP_OPTPAR_PM_STATE; | |
711 | switch (attr->path_mig_state) { | |
712 | case IB_MIG_MIGRATED: | |
713 | context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11); | |
714 | break; | |
715 | case IB_MIG_REARM: | |
716 | context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11); | |
717 | break; | |
718 | case IB_MIG_ARMED: | |
719 | context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11); | |
720 | break; | |
721 | } | |
722 | } | |
723 | ||
724 | if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI || | |
725 | ibqp->qp_type == IB_QPT_UD) | |
726 | context->mtu_msgmax = (IB_MTU_4096 << 5) | 11; | |
727 | else if (attr_mask & IB_QP_PATH_MTU) { | |
728 | if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) { | |
729 | printk(KERN_ERR "path MTU (%u) is invalid\n", | |
730 | attr->path_mtu); | |
731 | return -EINVAL; | |
732 | } | |
733 | context->mtu_msgmax = (attr->path_mtu << 5) | 31; | |
734 | } | |
735 | ||
736 | if (qp->rq.max) | |
737 | context->rq_size_stride = ilog2(qp->rq.max) << 3; | |
738 | context->rq_size_stride |= qp->rq.wqe_shift - 4; | |
739 | ||
740 | if (qp->sq.max) | |
741 | context->sq_size_stride = ilog2(qp->sq.max) << 3; | |
742 | context->sq_size_stride |= qp->sq.wqe_shift - 4; | |
743 | ||
744 | if (qp->ibqp.uobject) | |
745 | context->usr_page = cpu_to_be32(to_mucontext(ibqp->uobject->context)->uar.index); | |
746 | else | |
747 | context->usr_page = cpu_to_be32(dev->priv_uar.index); | |
748 | ||
749 | if (attr_mask & IB_QP_DEST_QPN) | |
750 | context->remote_qpn = cpu_to_be32(attr->dest_qp_num); | |
751 | ||
752 | if (attr_mask & IB_QP_PORT) { | |
753 | if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD && | |
754 | !(attr_mask & IB_QP_AV)) { | |
755 | mlx4_set_sched(&context->pri_path, attr->port_num); | |
756 | optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE; | |
757 | } | |
758 | } | |
759 | ||
760 | if (attr_mask & IB_QP_PKEY_INDEX) { | |
761 | context->pri_path.pkey_index = attr->pkey_index; | |
762 | optpar |= MLX4_QP_OPTPAR_PKEY_INDEX; | |
763 | } | |
764 | ||
225c7b1f RD |
765 | if (attr_mask & IB_QP_AV) { |
766 | if (mlx4_set_path(dev, &attr->ah_attr, &context->pri_path, | |
767 | attr_mask & IB_QP_PORT ? attr->port_num : qp->port)) { | |
768 | err = -EINVAL; | |
769 | goto out; | |
770 | } | |
771 | ||
772 | optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH | | |
773 | MLX4_QP_OPTPAR_SCHED_QUEUE); | |
774 | } | |
775 | ||
776 | if (attr_mask & IB_QP_TIMEOUT) { | |
777 | context->pri_path.ackto = attr->timeout << 3; | |
778 | optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT; | |
779 | } | |
780 | ||
781 | if (attr_mask & IB_QP_ALT_PATH) { | |
782 | if (attr->alt_pkey_index >= dev->dev->caps.pkey_table_len) | |
783 | return -EINVAL; | |
784 | ||
785 | if (attr->alt_port_num == 0 || | |
786 | attr->alt_port_num > dev->dev->caps.num_ports) | |
787 | return -EINVAL; | |
788 | ||
789 | if (mlx4_set_path(dev, &attr->alt_ah_attr, &context->alt_path, | |
790 | attr->alt_port_num)) | |
791 | return -EINVAL; | |
792 | ||
793 | context->alt_path.pkey_index = attr->alt_pkey_index; | |
794 | context->alt_path.ackto = attr->alt_timeout << 3; | |
795 | optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH; | |
796 | } | |
797 | ||
798 | context->pd = cpu_to_be32(to_mpd(ibqp->pd)->pdn); | |
799 | context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28); | |
57f01b53 JM |
800 | |
801 | if (attr_mask & IB_QP_RNR_RETRY) { | |
802 | context->params1 |= cpu_to_be32(attr->rnr_retry << 13); | |
803 | optpar |= MLX4_QP_OPTPAR_RNR_RETRY; | |
804 | } | |
805 | ||
225c7b1f RD |
806 | if (attr_mask & IB_QP_RETRY_CNT) { |
807 | context->params1 |= cpu_to_be32(attr->retry_cnt << 16); | |
808 | optpar |= MLX4_QP_OPTPAR_RETRY_COUNT; | |
809 | } | |
810 | ||
811 | if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) { | |
812 | if (attr->max_rd_atomic) | |
813 | context->params1 |= | |
814 | cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21); | |
815 | optpar |= MLX4_QP_OPTPAR_SRA_MAX; | |
816 | } | |
817 | ||
818 | if (attr_mask & IB_QP_SQ_PSN) | |
819 | context->next_send_psn = cpu_to_be32(attr->sq_psn); | |
820 | ||
821 | context->cqn_send = cpu_to_be32(to_mcq(ibqp->send_cq)->mcq.cqn); | |
822 | ||
823 | if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) { | |
824 | if (attr->max_dest_rd_atomic) | |
825 | context->params2 |= | |
826 | cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21); | |
827 | optpar |= MLX4_QP_OPTPAR_RRA_MAX; | |
828 | } | |
829 | ||
830 | if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) { | |
831 | context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask); | |
832 | optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE; | |
833 | } | |
834 | ||
835 | if (ibqp->srq) | |
836 | context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC); | |
837 | ||
838 | if (attr_mask & IB_QP_MIN_RNR_TIMER) { | |
839 | context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24); | |
840 | optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT; | |
841 | } | |
842 | if (attr_mask & IB_QP_RQ_PSN) | |
843 | context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn); | |
844 | ||
845 | context->cqn_recv = cpu_to_be32(to_mcq(ibqp->recv_cq)->mcq.cqn); | |
846 | ||
847 | if (attr_mask & IB_QP_QKEY) { | |
848 | context->qkey = cpu_to_be32(attr->qkey); | |
849 | optpar |= MLX4_QP_OPTPAR_Q_KEY; | |
850 | } | |
851 | ||
852 | if (ibqp->srq) | |
853 | context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn); | |
854 | ||
02d89b87 | 855 | if (!ibqp->srq && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) |
225c7b1f RD |
856 | context->db_rec_addr = cpu_to_be64(qp->db.dma); |
857 | ||
858 | if (cur_state == IB_QPS_INIT && | |
859 | new_state == IB_QPS_RTR && | |
860 | (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI || | |
861 | ibqp->qp_type == IB_QPT_UD)) { | |
862 | context->pri_path.sched_queue = (qp->port - 1) << 6; | |
863 | if (is_qp0(dev, qp)) | |
864 | context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE; | |
865 | else | |
866 | context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE; | |
867 | } | |
868 | ||
869 | if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD && | |
870 | attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify) | |
871 | sqd_event = 1; | |
872 | else | |
873 | sqd_event = 0; | |
874 | ||
c0be5fb5 EC |
875 | /* |
876 | * Before passing a kernel QP to the HW, make sure that the | |
877 | * ownership bits of the send queue are set so that the | |
878 | * hardware doesn't start processing stale work requests. | |
879 | */ | |
880 | if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) { | |
881 | struct mlx4_wqe_ctrl_seg *ctrl; | |
882 | int i; | |
883 | ||
884 | for (i = 0; i < qp->sq.max; ++i) { | |
885 | ctrl = get_send_wqe(qp, i); | |
886 | ctrl->owner_opcode = cpu_to_be32(1 << 31); | |
887 | } | |
888 | } | |
889 | ||
225c7b1f RD |
890 | err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state), |
891 | to_mlx4_state(new_state), context, optpar, | |
892 | sqd_event, &qp->mqp); | |
893 | if (err) | |
894 | goto out; | |
895 | ||
896 | qp->state = new_state; | |
897 | ||
898 | if (attr_mask & IB_QP_ACCESS_FLAGS) | |
899 | qp->atomic_rd_en = attr->qp_access_flags; | |
900 | if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) | |
901 | qp->resp_depth = attr->max_dest_rd_atomic; | |
902 | if (attr_mask & IB_QP_PORT) | |
903 | qp->port = attr->port_num; | |
904 | if (attr_mask & IB_QP_ALT_PATH) | |
905 | qp->alt_port = attr->alt_port_num; | |
906 | ||
907 | if (is_sqp(dev, qp)) | |
908 | store_sqp_attrs(to_msqp(qp), attr, attr_mask); | |
909 | ||
910 | /* | |
911 | * If we moved QP0 to RTR, bring the IB link up; if we moved | |
912 | * QP0 to RESET or ERROR, bring the link back down. | |
913 | */ | |
914 | if (is_qp0(dev, qp)) { | |
915 | if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR) | |
916 | init_port(dev, qp->port); | |
917 | ||
918 | if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR && | |
919 | (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR)) | |
920 | mlx4_CLOSE_PORT(dev->dev, qp->port); | |
921 | } | |
922 | ||
923 | /* | |
924 | * If we moved a kernel QP to RESET, clean up all old CQ | |
925 | * entries and reinitialize the QP. | |
926 | */ | |
927 | if (new_state == IB_QPS_RESET && !ibqp->uobject) { | |
928 | mlx4_ib_cq_clean(to_mcq(ibqp->recv_cq), qp->mqp.qpn, | |
929 | ibqp->srq ? to_msrq(ibqp->srq): NULL); | |
930 | if (ibqp->send_cq != ibqp->recv_cq) | |
931 | mlx4_ib_cq_clean(to_mcq(ibqp->send_cq), qp->mqp.qpn, NULL); | |
932 | ||
933 | qp->rq.head = 0; | |
934 | qp->rq.tail = 0; | |
935 | qp->sq.head = 0; | |
936 | qp->sq.tail = 0; | |
02d89b87 RD |
937 | if (!ibqp->srq) |
938 | *qp->db.db = 0; | |
225c7b1f RD |
939 | } |
940 | ||
941 | out: | |
225c7b1f RD |
942 | kfree(context); |
943 | return err; | |
944 | } | |
945 | ||
65adfa91 MT |
946 | static const struct ib_qp_attr mlx4_ib_qp_attr = { .port_num = 1 }; |
947 | static const int mlx4_ib_qp_attr_mask_table[IB_QPT_UD + 1] = { | |
948 | [IB_QPT_UD] = (IB_QP_PKEY_INDEX | | |
949 | IB_QP_PORT | | |
950 | IB_QP_QKEY), | |
951 | [IB_QPT_UC] = (IB_QP_PKEY_INDEX | | |
952 | IB_QP_PORT | | |
953 | IB_QP_ACCESS_FLAGS), | |
954 | [IB_QPT_RC] = (IB_QP_PKEY_INDEX | | |
955 | IB_QP_PORT | | |
956 | IB_QP_ACCESS_FLAGS), | |
957 | [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | | |
958 | IB_QP_QKEY), | |
959 | [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | | |
960 | IB_QP_QKEY), | |
961 | }; | |
962 | ||
963 | int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, | |
964 | int attr_mask, struct ib_udata *udata) | |
965 | { | |
966 | struct mlx4_ib_dev *dev = to_mdev(ibqp->device); | |
967 | struct mlx4_ib_qp *qp = to_mqp(ibqp); | |
968 | enum ib_qp_state cur_state, new_state; | |
969 | int err = -EINVAL; | |
970 | ||
971 | mutex_lock(&qp->mutex); | |
972 | ||
973 | cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state; | |
974 | new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state; | |
975 | ||
976 | if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, attr_mask)) | |
977 | goto out; | |
978 | ||
979 | if ((attr_mask & IB_QP_PKEY_INDEX) && | |
980 | attr->pkey_index >= dev->dev->caps.pkey_table_len) { | |
981 | goto out; | |
982 | } | |
983 | ||
984 | if ((attr_mask & IB_QP_PORT) && | |
985 | (attr->port_num == 0 || attr->port_num > dev->dev->caps.num_ports)) { | |
986 | goto out; | |
987 | } | |
988 | ||
989 | if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC && | |
990 | attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) { | |
991 | goto out; | |
992 | } | |
993 | ||
994 | if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC && | |
995 | attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) { | |
996 | goto out; | |
997 | } | |
998 | ||
999 | if (cur_state == new_state && cur_state == IB_QPS_RESET) { | |
1000 | err = 0; | |
1001 | goto out; | |
1002 | } | |
1003 | ||
1004 | if (cur_state == IB_QPS_RESET && new_state == IB_QPS_ERR) { | |
1005 | err = __mlx4_ib_modify_qp(ibqp, &mlx4_ib_qp_attr, | |
1006 | mlx4_ib_qp_attr_mask_table[ibqp->qp_type], | |
1007 | IB_QPS_RESET, IB_QPS_INIT); | |
1008 | if (err) | |
1009 | goto out; | |
1010 | cur_state = IB_QPS_INIT; | |
1011 | } | |
1012 | ||
1013 | err = __mlx4_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state); | |
1014 | ||
1015 | out: | |
1016 | mutex_unlock(&qp->mutex); | |
1017 | return err; | |
1018 | } | |
1019 | ||
225c7b1f RD |
1020 | static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr, |
1021 | void *wqe) | |
1022 | { | |
1023 | struct ib_device *ib_dev = &to_mdev(sqp->qp.ibqp.device)->ib_dev; | |
1024 | struct mlx4_wqe_mlx_seg *mlx = wqe; | |
1025 | struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx; | |
1026 | struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah); | |
1027 | u16 pkey; | |
1028 | int send_size; | |
1029 | int header_size; | |
1030 | int i; | |
1031 | ||
1032 | send_size = 0; | |
1033 | for (i = 0; i < wr->num_sge; ++i) | |
1034 | send_size += wr->sg_list[i].length; | |
1035 | ||
1036 | ib_ud_header_init(send_size, mlx4_ib_ah_grh_present(ah), &sqp->ud_header); | |
1037 | ||
1038 | sqp->ud_header.lrh.service_level = | |
1039 | be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 28; | |
1040 | sqp->ud_header.lrh.destination_lid = ah->av.dlid; | |
1041 | sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.g_slid & 0x7f); | |
1042 | if (mlx4_ib_ah_grh_present(ah)) { | |
1043 | sqp->ud_header.grh.traffic_class = | |
1044 | (be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 20) & 0xff; | |
1045 | sqp->ud_header.grh.flow_label = | |
1046 | ah->av.sl_tclass_flowlabel & cpu_to_be32(0xfffff); | |
15261303 | 1047 | sqp->ud_header.grh.hop_limit = ah->av.hop_limit; |
225c7b1f RD |
1048 | ib_get_cached_gid(ib_dev, be32_to_cpu(ah->av.port_pd) >> 24, |
1049 | ah->av.gid_index, &sqp->ud_header.grh.source_gid); | |
1050 | memcpy(sqp->ud_header.grh.destination_gid.raw, | |
1051 | ah->av.dgid, 16); | |
1052 | } | |
1053 | ||
1054 | mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE); | |
1055 | mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) | | |
1056 | (sqp->ud_header.lrh.destination_lid == | |
1057 | IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) | | |
1058 | (sqp->ud_header.lrh.service_level << 8)); | |
1059 | mlx->rlid = sqp->ud_header.lrh.destination_lid; | |
1060 | ||
1061 | switch (wr->opcode) { | |
1062 | case IB_WR_SEND: | |
1063 | sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY; | |
1064 | sqp->ud_header.immediate_present = 0; | |
1065 | break; | |
1066 | case IB_WR_SEND_WITH_IMM: | |
1067 | sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE; | |
1068 | sqp->ud_header.immediate_present = 1; | |
1069 | sqp->ud_header.immediate_data = wr->imm_data; | |
1070 | break; | |
1071 | default: | |
1072 | return -EINVAL; | |
1073 | } | |
1074 | ||
1075 | sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0; | |
1076 | if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE) | |
1077 | sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE; | |
1078 | sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED); | |
1079 | if (!sqp->qp.ibqp.qp_num) | |
1080 | ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey); | |
1081 | else | |
1082 | ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey); | |
1083 | sqp->ud_header.bth.pkey = cpu_to_be16(pkey); | |
1084 | sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn); | |
1085 | sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1)); | |
1086 | sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ? | |
1087 | sqp->qkey : wr->wr.ud.remote_qkey); | |
1088 | sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num); | |
1089 | ||
1090 | header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf); | |
1091 | ||
1092 | if (0) { | |
1093 | printk(KERN_ERR "built UD header of size %d:\n", header_size); | |
1094 | for (i = 0; i < header_size / 4; ++i) { | |
1095 | if (i % 8 == 0) | |
1096 | printk(" [%02x] ", i * 4); | |
1097 | printk(" %08x", | |
1098 | be32_to_cpu(((__be32 *) sqp->header_buf)[i])); | |
1099 | if ((i + 1) % 8 == 0) | |
1100 | printk("\n"); | |
1101 | } | |
1102 | printk("\n"); | |
1103 | } | |
1104 | ||
1105 | inl->byte_count = cpu_to_be32(1 << 31 | header_size); | |
1106 | memcpy(inl + 1, sqp->header_buf, header_size); | |
1107 | ||
1108 | return ALIGN(sizeof (struct mlx4_wqe_inline_seg) + header_size, 16); | |
1109 | } | |
1110 | ||
1111 | static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq) | |
1112 | { | |
1113 | unsigned cur; | |
1114 | struct mlx4_ib_cq *cq; | |
1115 | ||
1116 | cur = wq->head - wq->tail; | |
1117 | if (likely(cur + nreq < wq->max)) | |
1118 | return 0; | |
1119 | ||
1120 | cq = to_mcq(ib_cq); | |
1121 | spin_lock(&cq->lock); | |
1122 | cur = wq->head - wq->tail; | |
1123 | spin_unlock(&cq->lock); | |
1124 | ||
1125 | return cur + nreq >= wq->max; | |
1126 | } | |
1127 | ||
1128 | int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, | |
1129 | struct ib_send_wr **bad_wr) | |
1130 | { | |
1131 | struct mlx4_ib_qp *qp = to_mqp(ibqp); | |
1132 | void *wqe; | |
1133 | struct mlx4_wqe_ctrl_seg *ctrl; | |
1134 | unsigned long flags; | |
1135 | int nreq; | |
1136 | int err = 0; | |
1137 | int ind; | |
1138 | int size; | |
1139 | int i; | |
1140 | ||
1141 | spin_lock_irqsave(&qp->rq.lock, flags); | |
1142 | ||
1143 | ind = qp->sq.head; | |
1144 | ||
1145 | for (nreq = 0; wr; ++nreq, wr = wr->next) { | |
1146 | if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) { | |
1147 | err = -ENOMEM; | |
1148 | *bad_wr = wr; | |
1149 | goto out; | |
1150 | } | |
1151 | ||
1152 | if (unlikely(wr->num_sge > qp->sq.max_gs)) { | |
1153 | err = -EINVAL; | |
1154 | *bad_wr = wr; | |
1155 | goto out; | |
1156 | } | |
1157 | ||
1158 | ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.max - 1)); | |
1159 | qp->sq.wrid[ind & (qp->sq.max - 1)] = wr->wr_id; | |
1160 | ||
1161 | ctrl->srcrb_flags = | |
1162 | (wr->send_flags & IB_SEND_SIGNALED ? | |
1163 | cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) | | |
1164 | (wr->send_flags & IB_SEND_SOLICITED ? | |
1165 | cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) | | |
1166 | qp->sq_signal_bits; | |
1167 | ||
1168 | if (wr->opcode == IB_WR_SEND_WITH_IMM || | |
1169 | wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) | |
1170 | ctrl->imm = wr->imm_data; | |
1171 | else | |
1172 | ctrl->imm = 0; | |
1173 | ||
1174 | wqe += sizeof *ctrl; | |
1175 | size = sizeof *ctrl / 16; | |
1176 | ||
1177 | switch (ibqp->qp_type) { | |
1178 | case IB_QPT_RC: | |
1179 | case IB_QPT_UC: | |
1180 | switch (wr->opcode) { | |
1181 | case IB_WR_ATOMIC_CMP_AND_SWP: | |
1182 | case IB_WR_ATOMIC_FETCH_AND_ADD: | |
1183 | ((struct mlx4_wqe_raddr_seg *) wqe)->raddr = | |
1184 | cpu_to_be64(wr->wr.atomic.remote_addr); | |
1185 | ((struct mlx4_wqe_raddr_seg *) wqe)->rkey = | |
1186 | cpu_to_be32(wr->wr.atomic.rkey); | |
1187 | ((struct mlx4_wqe_raddr_seg *) wqe)->reserved = 0; | |
1188 | ||
1189 | wqe += sizeof (struct mlx4_wqe_raddr_seg); | |
1190 | ||
1191 | if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) { | |
1192 | ((struct mlx4_wqe_atomic_seg *) wqe)->swap_add = | |
1193 | cpu_to_be64(wr->wr.atomic.swap); | |
1194 | ((struct mlx4_wqe_atomic_seg *) wqe)->compare = | |
1195 | cpu_to_be64(wr->wr.atomic.compare_add); | |
1196 | } else { | |
1197 | ((struct mlx4_wqe_atomic_seg *) wqe)->swap_add = | |
1198 | cpu_to_be64(wr->wr.atomic.compare_add); | |
1199 | ((struct mlx4_wqe_atomic_seg *) wqe)->compare = 0; | |
1200 | } | |
1201 | ||
1202 | wqe += sizeof (struct mlx4_wqe_atomic_seg); | |
1203 | size += (sizeof (struct mlx4_wqe_raddr_seg) + | |
1204 | sizeof (struct mlx4_wqe_atomic_seg)) / 16; | |
1205 | ||
1206 | break; | |
1207 | ||
1208 | case IB_WR_RDMA_READ: | |
1209 | case IB_WR_RDMA_WRITE: | |
1210 | case IB_WR_RDMA_WRITE_WITH_IMM: | |
1211 | ((struct mlx4_wqe_raddr_seg *) wqe)->raddr = | |
1212 | cpu_to_be64(wr->wr.rdma.remote_addr); | |
1213 | ((struct mlx4_wqe_raddr_seg *) wqe)->rkey = | |
1214 | cpu_to_be32(wr->wr.rdma.rkey); | |
1215 | ((struct mlx4_wqe_raddr_seg *) wqe)->reserved = 0; | |
1216 | ||
1217 | wqe += sizeof (struct mlx4_wqe_raddr_seg); | |
1218 | size += sizeof (struct mlx4_wqe_raddr_seg) / 16; | |
1219 | ||
1220 | break; | |
1221 | ||
1222 | default: | |
1223 | /* No extra segments required for sends */ | |
1224 | break; | |
1225 | } | |
1226 | break; | |
1227 | ||
1228 | case IB_QPT_UD: | |
1229 | memcpy(((struct mlx4_wqe_datagram_seg *) wqe)->av, | |
1230 | &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av)); | |
1231 | ((struct mlx4_wqe_datagram_seg *) wqe)->dqpn = | |
1232 | cpu_to_be32(wr->wr.ud.remote_qpn); | |
1233 | ((struct mlx4_wqe_datagram_seg *) wqe)->qkey = | |
1234 | cpu_to_be32(wr->wr.ud.remote_qkey); | |
1235 | ||
1236 | wqe += sizeof (struct mlx4_wqe_datagram_seg); | |
1237 | size += sizeof (struct mlx4_wqe_datagram_seg) / 16; | |
1238 | break; | |
1239 | ||
1240 | case IB_QPT_SMI: | |
1241 | case IB_QPT_GSI: | |
1242 | err = build_mlx_header(to_msqp(qp), wr, ctrl); | |
1243 | if (err < 0) { | |
1244 | *bad_wr = wr; | |
1245 | goto out; | |
1246 | } | |
1247 | wqe += err; | |
1248 | size += err / 16; | |
1249 | ||
1250 | err = 0; | |
1251 | break; | |
1252 | ||
1253 | default: | |
1254 | break; | |
1255 | } | |
1256 | ||
1257 | for (i = 0; i < wr->num_sge; ++i) { | |
1258 | ((struct mlx4_wqe_data_seg *) wqe)->byte_count = | |
1259 | cpu_to_be32(wr->sg_list[i].length); | |
1260 | ((struct mlx4_wqe_data_seg *) wqe)->lkey = | |
1261 | cpu_to_be32(wr->sg_list[i].lkey); | |
1262 | ((struct mlx4_wqe_data_seg *) wqe)->addr = | |
1263 | cpu_to_be64(wr->sg_list[i].addr); | |
1264 | ||
1265 | wqe += sizeof (struct mlx4_wqe_data_seg); | |
1266 | size += sizeof (struct mlx4_wqe_data_seg) / 16; | |
1267 | } | |
1268 | ||
1269 | /* Add one more inline data segment for ICRC for MLX sends */ | |
1270 | if (qp->ibqp.qp_type == IB_QPT_SMI || qp->ibqp.qp_type == IB_QPT_GSI) { | |
1271 | ((struct mlx4_wqe_inline_seg *) wqe)->byte_count = | |
1272 | cpu_to_be32((1 << 31) | 4); | |
1273 | ((u32 *) wqe)[1] = 0; | |
1274 | wqe += sizeof (struct mlx4_wqe_data_seg); | |
1275 | size += sizeof (struct mlx4_wqe_data_seg) / 16; | |
1276 | } | |
1277 | ||
1278 | ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ? | |
1279 | MLX4_WQE_CTRL_FENCE : 0) | size; | |
1280 | ||
1281 | /* | |
1282 | * Make sure descriptor is fully written before | |
1283 | * setting ownership bit (because HW can start | |
1284 | * executing as soon as we do). | |
1285 | */ | |
1286 | wmb(); | |
1287 | ||
59b0ed12 | 1288 | if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) { |
225c7b1f RD |
1289 | err = -EINVAL; |
1290 | goto out; | |
1291 | } | |
1292 | ||
1293 | ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] | | |
1294 | (ind & qp->sq.max ? cpu_to_be32(1 << 31) : 0); | |
1295 | ||
1296 | ++ind; | |
1297 | } | |
1298 | ||
1299 | out: | |
1300 | if (likely(nreq)) { | |
1301 | qp->sq.head += nreq; | |
1302 | ||
1303 | /* | |
1304 | * Make sure that descriptors are written before | |
1305 | * doorbell record. | |
1306 | */ | |
1307 | wmb(); | |
1308 | ||
1309 | writel(qp->doorbell_qpn, | |
1310 | to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL); | |
1311 | ||
1312 | /* | |
1313 | * Make sure doorbells don't leak out of SQ spinlock | |
1314 | * and reach the HCA out of order. | |
1315 | */ | |
1316 | mmiowb(); | |
1317 | } | |
1318 | ||
1319 | spin_unlock_irqrestore(&qp->rq.lock, flags); | |
1320 | ||
1321 | return err; | |
1322 | } | |
1323 | ||
1324 | int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr, | |
1325 | struct ib_recv_wr **bad_wr) | |
1326 | { | |
1327 | struct mlx4_ib_qp *qp = to_mqp(ibqp); | |
1328 | struct mlx4_wqe_data_seg *scat; | |
1329 | unsigned long flags; | |
1330 | int err = 0; | |
1331 | int nreq; | |
1332 | int ind; | |
1333 | int i; | |
1334 | ||
1335 | spin_lock_irqsave(&qp->rq.lock, flags); | |
1336 | ||
1337 | ind = qp->rq.head & (qp->rq.max - 1); | |
1338 | ||
1339 | for (nreq = 0; wr; ++nreq, wr = wr->next) { | |
1340 | if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.send_cq)) { | |
1341 | err = -ENOMEM; | |
1342 | *bad_wr = wr; | |
1343 | goto out; | |
1344 | } | |
1345 | ||
1346 | if (unlikely(wr->num_sge > qp->rq.max_gs)) { | |
1347 | err = -EINVAL; | |
1348 | *bad_wr = wr; | |
1349 | goto out; | |
1350 | } | |
1351 | ||
1352 | scat = get_recv_wqe(qp, ind); | |
1353 | ||
1354 | for (i = 0; i < wr->num_sge; ++i) { | |
1355 | scat[i].byte_count = cpu_to_be32(wr->sg_list[i].length); | |
1356 | scat[i].lkey = cpu_to_be32(wr->sg_list[i].lkey); | |
1357 | scat[i].addr = cpu_to_be64(wr->sg_list[i].addr); | |
1358 | } | |
1359 | ||
1360 | if (i < qp->rq.max_gs) { | |
1361 | scat[i].byte_count = 0; | |
1362 | scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY); | |
1363 | scat[i].addr = 0; | |
1364 | } | |
1365 | ||
1366 | qp->rq.wrid[ind] = wr->wr_id; | |
1367 | ||
1368 | ind = (ind + 1) & (qp->rq.max - 1); | |
1369 | } | |
1370 | ||
1371 | out: | |
1372 | if (likely(nreq)) { | |
1373 | qp->rq.head += nreq; | |
1374 | ||
1375 | /* | |
1376 | * Make sure that descriptors are written before | |
1377 | * doorbell record. | |
1378 | */ | |
1379 | wmb(); | |
1380 | ||
1381 | *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff); | |
1382 | } | |
1383 | ||
1384 | spin_unlock_irqrestore(&qp->rq.lock, flags); | |
1385 | ||
1386 | return err; | |
1387 | } |