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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 | ||
0e6e7416 RD |
112 | /* |
113 | * Stamp a SQ WQE so that it is invalid if prefetched by marking the | |
114 | * first four bytes of every 64 byte chunk with 0xffffffff, except for | |
115 | * the very first chunk of the WQE. | |
116 | */ | |
117 | static void stamp_send_wqe(struct mlx4_ib_qp *qp, int n) | |
118 | { | |
119 | u32 *wqe = get_send_wqe(qp, n); | |
120 | int i; | |
121 | ||
122 | for (i = 16; i < 1 << (qp->sq.wqe_shift - 2); i += 16) | |
123 | wqe[i] = 0xffffffff; | |
124 | } | |
125 | ||
225c7b1f RD |
126 | static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type) |
127 | { | |
128 | struct ib_event event; | |
129 | struct ib_qp *ibqp = &to_mibqp(qp)->ibqp; | |
130 | ||
131 | if (type == MLX4_EVENT_TYPE_PATH_MIG) | |
132 | to_mibqp(qp)->port = to_mibqp(qp)->alt_port; | |
133 | ||
134 | if (ibqp->event_handler) { | |
135 | event.device = ibqp->device; | |
136 | event.element.qp = ibqp; | |
137 | switch (type) { | |
138 | case MLX4_EVENT_TYPE_PATH_MIG: | |
139 | event.event = IB_EVENT_PATH_MIG; | |
140 | break; | |
141 | case MLX4_EVENT_TYPE_COMM_EST: | |
142 | event.event = IB_EVENT_COMM_EST; | |
143 | break; | |
144 | case MLX4_EVENT_TYPE_SQ_DRAINED: | |
145 | event.event = IB_EVENT_SQ_DRAINED; | |
146 | break; | |
147 | case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE: | |
148 | event.event = IB_EVENT_QP_LAST_WQE_REACHED; | |
149 | break; | |
150 | case MLX4_EVENT_TYPE_WQ_CATAS_ERROR: | |
151 | event.event = IB_EVENT_QP_FATAL; | |
152 | break; | |
153 | case MLX4_EVENT_TYPE_PATH_MIG_FAILED: | |
154 | event.event = IB_EVENT_PATH_MIG_ERR; | |
155 | break; | |
156 | case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR: | |
157 | event.event = IB_EVENT_QP_REQ_ERR; | |
158 | break; | |
159 | case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR: | |
160 | event.event = IB_EVENT_QP_ACCESS_ERR; | |
161 | break; | |
162 | default: | |
163 | printk(KERN_WARNING "mlx4_ib: Unexpected event type %d " | |
164 | "on QP %06x\n", type, qp->qpn); | |
165 | return; | |
166 | } | |
167 | ||
168 | ibqp->event_handler(&event, ibqp->qp_context); | |
169 | } | |
170 | } | |
171 | ||
172 | static int send_wqe_overhead(enum ib_qp_type type) | |
173 | { | |
174 | /* | |
175 | * UD WQEs must have a datagram segment. | |
176 | * RC and UC WQEs might have a remote address segment. | |
177 | * MLX WQEs need two extra inline data segments (for the UD | |
178 | * header and space for the ICRC). | |
179 | */ | |
180 | switch (type) { | |
181 | case IB_QPT_UD: | |
182 | return sizeof (struct mlx4_wqe_ctrl_seg) + | |
183 | sizeof (struct mlx4_wqe_datagram_seg); | |
184 | case IB_QPT_UC: | |
185 | return sizeof (struct mlx4_wqe_ctrl_seg) + | |
186 | sizeof (struct mlx4_wqe_raddr_seg); | |
187 | case IB_QPT_RC: | |
188 | return sizeof (struct mlx4_wqe_ctrl_seg) + | |
189 | sizeof (struct mlx4_wqe_atomic_seg) + | |
190 | sizeof (struct mlx4_wqe_raddr_seg); | |
191 | case IB_QPT_SMI: | |
192 | case IB_QPT_GSI: | |
193 | return sizeof (struct mlx4_wqe_ctrl_seg) + | |
194 | ALIGN(MLX4_IB_UD_HEADER_SIZE + | |
e61ef241 RD |
195 | DIV_ROUND_UP(MLX4_IB_UD_HEADER_SIZE, |
196 | MLX4_INLINE_ALIGN) * | |
225c7b1f RD |
197 | sizeof (struct mlx4_wqe_inline_seg), |
198 | sizeof (struct mlx4_wqe_data_seg)) + | |
199 | ALIGN(4 + | |
200 | sizeof (struct mlx4_wqe_inline_seg), | |
201 | sizeof (struct mlx4_wqe_data_seg)); | |
202 | default: | |
203 | return sizeof (struct mlx4_wqe_ctrl_seg); | |
204 | } | |
205 | } | |
206 | ||
2446304d | 207 | static int set_rq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap, |
a4cd7ed8 | 208 | int is_user, int has_srq, struct mlx4_ib_qp *qp) |
225c7b1f | 209 | { |
2446304d EC |
210 | /* Sanity check RQ size before proceeding */ |
211 | if (cap->max_recv_wr > dev->dev->caps.max_wqes || | |
212 | cap->max_recv_sge > dev->dev->caps.max_rq_sg) | |
213 | return -EINVAL; | |
214 | ||
a4cd7ed8 RD |
215 | if (has_srq) { |
216 | /* QPs attached to an SRQ should have no RQ */ | |
217 | if (cap->max_recv_wr) | |
218 | return -EINVAL; | |
2446304d | 219 | |
0e6e7416 | 220 | qp->rq.wqe_cnt = qp->rq.max_gs = 0; |
a4cd7ed8 RD |
221 | } else { |
222 | /* HW requires >= 1 RQ entry with >= 1 gather entry */ | |
223 | if (is_user && (!cap->max_recv_wr || !cap->max_recv_sge)) | |
224 | return -EINVAL; | |
225 | ||
0e6e7416 | 226 | qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, cap->max_recv_wr)); |
42c059ea | 227 | qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge)); |
a4cd7ed8 RD |
228 | qp->rq.wqe_shift = ilog2(qp->rq.max_gs * sizeof (struct mlx4_wqe_data_seg)); |
229 | } | |
2446304d | 230 | |
0e6e7416 | 231 | cap->max_recv_wr = qp->rq.max_post = qp->rq.wqe_cnt; |
2446304d EC |
232 | cap->max_recv_sge = qp->rq.max_gs; |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap, | |
238 | enum ib_qp_type type, struct mlx4_ib_qp *qp) | |
239 | { | |
240 | /* Sanity check SQ size before proceeding */ | |
225c7b1f | 241 | if (cap->max_send_wr > dev->dev->caps.max_wqes || |
225c7b1f | 242 | cap->max_send_sge > dev->dev->caps.max_sq_sg || |
225c7b1f RD |
243 | cap->max_inline_data + send_wqe_overhead(type) + |
244 | sizeof (struct mlx4_wqe_inline_seg) > dev->dev->caps.max_sq_desc_sz) | |
245 | return -EINVAL; | |
246 | ||
247 | /* | |
248 | * For MLX transport we need 2 extra S/G entries: | |
249 | * one for the header and one for the checksum at the end | |
250 | */ | |
251 | if ((type == IB_QPT_SMI || type == IB_QPT_GSI) && | |
252 | cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg) | |
253 | return -EINVAL; | |
254 | ||
225c7b1f RD |
255 | qp->sq.wqe_shift = ilog2(roundup_pow_of_two(max(cap->max_send_sge * |
256 | sizeof (struct mlx4_wqe_data_seg), | |
257 | cap->max_inline_data + | |
258 | sizeof (struct mlx4_wqe_inline_seg)) + | |
259 | send_wqe_overhead(type))); | |
260 | qp->sq.max_gs = ((1 << qp->sq.wqe_shift) - send_wqe_overhead(type)) / | |
261 | sizeof (struct mlx4_wqe_data_seg); | |
262 | ||
0e6e7416 RD |
263 | /* |
264 | * We need to leave 2 KB + 1 WQE of headroom in the SQ to | |
265 | * allow HW to prefetch. | |
266 | */ | |
267 | qp->sq_spare_wqes = (2048 >> qp->sq.wqe_shift) + 1; | |
268 | qp->sq.wqe_cnt = roundup_pow_of_two(cap->max_send_wr + qp->sq_spare_wqes); | |
269 | ||
270 | qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) + | |
271 | (qp->sq.wqe_cnt << qp->sq.wqe_shift); | |
225c7b1f RD |
272 | if (qp->rq.wqe_shift > qp->sq.wqe_shift) { |
273 | qp->rq.offset = 0; | |
0e6e7416 | 274 | qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift; |
225c7b1f | 275 | } else { |
0e6e7416 | 276 | qp->rq.offset = qp->sq.wqe_cnt << qp->sq.wqe_shift; |
225c7b1f RD |
277 | qp->sq.offset = 0; |
278 | } | |
279 | ||
0e6e7416 RD |
280 | cap->max_send_wr = qp->sq.max_post = qp->sq.wqe_cnt - qp->sq_spare_wqes; |
281 | cap->max_send_sge = qp->sq.max_gs; | |
54e95f8d RD |
282 | /* We don't support inline sends for kernel QPs (yet) */ |
283 | cap->max_inline_data = 0; | |
225c7b1f RD |
284 | |
285 | return 0; | |
286 | } | |
287 | ||
2446304d EC |
288 | static int set_user_sq_size(struct mlx4_ib_qp *qp, |
289 | struct mlx4_ib_create_qp *ucmd) | |
290 | { | |
0e6e7416 | 291 | qp->sq.wqe_cnt = 1 << ucmd->log_sq_bb_count; |
2446304d EC |
292 | qp->sq.wqe_shift = ucmd->log_sq_stride; |
293 | ||
0e6e7416 RD |
294 | qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) + |
295 | (qp->sq.wqe_cnt << qp->sq.wqe_shift); | |
2446304d EC |
296 | |
297 | return 0; | |
298 | } | |
299 | ||
225c7b1f RD |
300 | static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd, |
301 | struct ib_qp_init_attr *init_attr, | |
302 | struct ib_udata *udata, int sqpn, struct mlx4_ib_qp *qp) | |
303 | { | |
225c7b1f | 304 | int err; |
225c7b1f RD |
305 | |
306 | mutex_init(&qp->mutex); | |
307 | spin_lock_init(&qp->sq.lock); | |
308 | spin_lock_init(&qp->rq.lock); | |
309 | ||
310 | qp->state = IB_QPS_RESET; | |
311 | qp->atomic_rd_en = 0; | |
312 | qp->resp_depth = 0; | |
313 | ||
314 | qp->rq.head = 0; | |
315 | qp->rq.tail = 0; | |
316 | qp->sq.head = 0; | |
317 | qp->sq.tail = 0; | |
318 | ||
a4cd7ed8 | 319 | err = set_rq_size(dev, &init_attr->cap, !!pd->uobject, !!init_attr->srq, qp); |
225c7b1f RD |
320 | if (err) |
321 | goto err; | |
322 | ||
323 | if (pd->uobject) { | |
324 | struct mlx4_ib_create_qp ucmd; | |
325 | ||
326 | if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) { | |
327 | err = -EFAULT; | |
328 | goto err; | |
329 | } | |
330 | ||
0e6e7416 RD |
331 | qp->sq_no_prefetch = ucmd.sq_no_prefetch; |
332 | ||
2446304d EC |
333 | err = set_user_sq_size(qp, &ucmd); |
334 | if (err) | |
335 | goto err; | |
336 | ||
225c7b1f RD |
337 | qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr, |
338 | qp->buf_size, 0); | |
339 | if (IS_ERR(qp->umem)) { | |
340 | err = PTR_ERR(qp->umem); | |
341 | goto err; | |
342 | } | |
343 | ||
344 | err = mlx4_mtt_init(dev->dev, ib_umem_page_count(qp->umem), | |
345 | ilog2(qp->umem->page_size), &qp->mtt); | |
346 | if (err) | |
347 | goto err_buf; | |
348 | ||
349 | err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem); | |
350 | if (err) | |
351 | goto err_mtt; | |
352 | ||
02d89b87 RD |
353 | if (!init_attr->srq) { |
354 | err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context), | |
355 | ucmd.db_addr, &qp->db); | |
356 | if (err) | |
357 | goto err_mtt; | |
358 | } | |
225c7b1f | 359 | } else { |
0e6e7416 RD |
360 | qp->sq_no_prefetch = 0; |
361 | ||
2446304d EC |
362 | err = set_kernel_sq_size(dev, &init_attr->cap, init_attr->qp_type, qp); |
363 | if (err) | |
364 | goto err; | |
365 | ||
02d89b87 RD |
366 | if (!init_attr->srq) { |
367 | err = mlx4_ib_db_alloc(dev, &qp->db, 0); | |
368 | if (err) | |
369 | goto err; | |
225c7b1f | 370 | |
02d89b87 RD |
371 | *qp->db.db = 0; |
372 | } | |
225c7b1f RD |
373 | |
374 | if (mlx4_buf_alloc(dev->dev, qp->buf_size, PAGE_SIZE * 2, &qp->buf)) { | |
375 | err = -ENOMEM; | |
376 | goto err_db; | |
377 | } | |
378 | ||
379 | err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift, | |
380 | &qp->mtt); | |
381 | if (err) | |
382 | goto err_buf; | |
383 | ||
384 | err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf); | |
385 | if (err) | |
386 | goto err_mtt; | |
387 | ||
0e6e7416 RD |
388 | qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof (u64), GFP_KERNEL); |
389 | qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof (u64), GFP_KERNEL); | |
225c7b1f RD |
390 | |
391 | if (!qp->sq.wrid || !qp->rq.wrid) { | |
392 | err = -ENOMEM; | |
393 | goto err_wrid; | |
394 | } | |
225c7b1f RD |
395 | } |
396 | ||
397 | err = mlx4_qp_alloc(dev->dev, sqpn, &qp->mqp); | |
398 | if (err) | |
399 | goto err_wrid; | |
400 | ||
401 | /* | |
402 | * Hardware wants QPN written in big-endian order (after | |
403 | * shifting) for send doorbell. Precompute this value to save | |
404 | * a little bit when posting sends. | |
405 | */ | |
406 | qp->doorbell_qpn = swab32(qp->mqp.qpn << 8); | |
407 | ||
408 | if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) | |
409 | qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE); | |
410 | else | |
411 | qp->sq_signal_bits = 0; | |
412 | ||
413 | qp->mqp.event = mlx4_ib_qp_event; | |
414 | ||
415 | return 0; | |
416 | ||
417 | err_wrid: | |
02d89b87 | 418 | if (pd->uobject && !init_attr->srq) |
225c7b1f RD |
419 | mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db); |
420 | else { | |
421 | kfree(qp->sq.wrid); | |
422 | kfree(qp->rq.wrid); | |
423 | } | |
424 | ||
425 | err_mtt: | |
426 | mlx4_mtt_cleanup(dev->dev, &qp->mtt); | |
427 | ||
428 | err_buf: | |
429 | if (pd->uobject) | |
430 | ib_umem_release(qp->umem); | |
431 | else | |
432 | mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf); | |
433 | ||
434 | err_db: | |
02d89b87 | 435 | if (!pd->uobject && !init_attr->srq) |
225c7b1f RD |
436 | mlx4_ib_db_free(dev, &qp->db); |
437 | ||
438 | err: | |
439 | return err; | |
440 | } | |
441 | ||
442 | static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state) | |
443 | { | |
444 | switch (state) { | |
445 | case IB_QPS_RESET: return MLX4_QP_STATE_RST; | |
446 | case IB_QPS_INIT: return MLX4_QP_STATE_INIT; | |
447 | case IB_QPS_RTR: return MLX4_QP_STATE_RTR; | |
448 | case IB_QPS_RTS: return MLX4_QP_STATE_RTS; | |
449 | case IB_QPS_SQD: return MLX4_QP_STATE_SQD; | |
450 | case IB_QPS_SQE: return MLX4_QP_STATE_SQER; | |
451 | case IB_QPS_ERR: return MLX4_QP_STATE_ERR; | |
452 | default: return -1; | |
453 | } | |
454 | } | |
455 | ||
456 | static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq) | |
457 | { | |
458 | if (send_cq == recv_cq) | |
459 | spin_lock_irq(&send_cq->lock); | |
460 | else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) { | |
461 | spin_lock_irq(&send_cq->lock); | |
462 | spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING); | |
463 | } else { | |
464 | spin_lock_irq(&recv_cq->lock); | |
465 | spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING); | |
466 | } | |
467 | } | |
468 | ||
469 | static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq) | |
470 | { | |
471 | if (send_cq == recv_cq) | |
472 | spin_unlock_irq(&send_cq->lock); | |
473 | else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) { | |
474 | spin_unlock(&recv_cq->lock); | |
475 | spin_unlock_irq(&send_cq->lock); | |
476 | } else { | |
477 | spin_unlock(&send_cq->lock); | |
478 | spin_unlock_irq(&recv_cq->lock); | |
479 | } | |
480 | } | |
481 | ||
482 | static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp, | |
483 | int is_user) | |
484 | { | |
485 | struct mlx4_ib_cq *send_cq, *recv_cq; | |
486 | ||
487 | if (qp->state != IB_QPS_RESET) | |
488 | if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state), | |
489 | MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp)) | |
490 | printk(KERN_WARNING "mlx4_ib: modify QP %06x to RESET failed.\n", | |
491 | qp->mqp.qpn); | |
492 | ||
493 | send_cq = to_mcq(qp->ibqp.send_cq); | |
494 | recv_cq = to_mcq(qp->ibqp.recv_cq); | |
495 | ||
496 | mlx4_ib_lock_cqs(send_cq, recv_cq); | |
497 | ||
498 | if (!is_user) { | |
499 | __mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn, | |
500 | qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL); | |
501 | if (send_cq != recv_cq) | |
502 | __mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL); | |
503 | } | |
504 | ||
505 | mlx4_qp_remove(dev->dev, &qp->mqp); | |
506 | ||
507 | mlx4_ib_unlock_cqs(send_cq, recv_cq); | |
508 | ||
509 | mlx4_qp_free(dev->dev, &qp->mqp); | |
510 | mlx4_mtt_cleanup(dev->dev, &qp->mtt); | |
511 | ||
512 | if (is_user) { | |
02d89b87 RD |
513 | if (!qp->ibqp.srq) |
514 | mlx4_ib_db_unmap_user(to_mucontext(qp->ibqp.uobject->context), | |
515 | &qp->db); | |
225c7b1f RD |
516 | ib_umem_release(qp->umem); |
517 | } else { | |
518 | kfree(qp->sq.wrid); | |
519 | kfree(qp->rq.wrid); | |
520 | mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf); | |
02d89b87 RD |
521 | if (!qp->ibqp.srq) |
522 | mlx4_ib_db_free(dev, &qp->db); | |
225c7b1f RD |
523 | } |
524 | } | |
525 | ||
526 | struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd, | |
527 | struct ib_qp_init_attr *init_attr, | |
528 | struct ib_udata *udata) | |
529 | { | |
530 | struct mlx4_ib_dev *dev = to_mdev(pd->device); | |
531 | struct mlx4_ib_sqp *sqp; | |
532 | struct mlx4_ib_qp *qp; | |
533 | int err; | |
534 | ||
535 | switch (init_attr->qp_type) { | |
536 | case IB_QPT_RC: | |
537 | case IB_QPT_UC: | |
538 | case IB_QPT_UD: | |
539 | { | |
540 | qp = kmalloc(sizeof *qp, GFP_KERNEL); | |
541 | if (!qp) | |
542 | return ERR_PTR(-ENOMEM); | |
543 | ||
544 | err = create_qp_common(dev, pd, init_attr, udata, 0, qp); | |
545 | if (err) { | |
546 | kfree(qp); | |
547 | return ERR_PTR(err); | |
548 | } | |
549 | ||
550 | qp->ibqp.qp_num = qp->mqp.qpn; | |
551 | ||
552 | break; | |
553 | } | |
554 | case IB_QPT_SMI: | |
555 | case IB_QPT_GSI: | |
556 | { | |
557 | /* Userspace is not allowed to create special QPs: */ | |
558 | if (pd->uobject) | |
559 | return ERR_PTR(-EINVAL); | |
560 | ||
561 | sqp = kmalloc(sizeof *sqp, GFP_KERNEL); | |
562 | if (!sqp) | |
563 | return ERR_PTR(-ENOMEM); | |
564 | ||
565 | qp = &sqp->qp; | |
566 | ||
567 | err = create_qp_common(dev, pd, init_attr, udata, | |
568 | dev->dev->caps.sqp_start + | |
569 | (init_attr->qp_type == IB_QPT_SMI ? 0 : 2) + | |
570 | init_attr->port_num - 1, | |
571 | qp); | |
572 | if (err) { | |
573 | kfree(sqp); | |
574 | return ERR_PTR(err); | |
575 | } | |
576 | ||
577 | qp->port = init_attr->port_num; | |
578 | qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1; | |
579 | ||
580 | break; | |
581 | } | |
582 | default: | |
583 | /* Don't support raw QPs */ | |
584 | return ERR_PTR(-EINVAL); | |
585 | } | |
586 | ||
587 | return &qp->ibqp; | |
588 | } | |
589 | ||
590 | int mlx4_ib_destroy_qp(struct ib_qp *qp) | |
591 | { | |
592 | struct mlx4_ib_dev *dev = to_mdev(qp->device); | |
593 | struct mlx4_ib_qp *mqp = to_mqp(qp); | |
594 | ||
595 | if (is_qp0(dev, mqp)) | |
596 | mlx4_CLOSE_PORT(dev->dev, mqp->port); | |
597 | ||
598 | destroy_qp_common(dev, mqp, !!qp->pd->uobject); | |
599 | ||
600 | if (is_sqp(dev, mqp)) | |
601 | kfree(to_msqp(mqp)); | |
602 | else | |
603 | kfree(mqp); | |
604 | ||
605 | return 0; | |
606 | } | |
607 | ||
225c7b1f RD |
608 | static int to_mlx4_st(enum ib_qp_type type) |
609 | { | |
610 | switch (type) { | |
611 | case IB_QPT_RC: return MLX4_QP_ST_RC; | |
612 | case IB_QPT_UC: return MLX4_QP_ST_UC; | |
613 | case IB_QPT_UD: return MLX4_QP_ST_UD; | |
614 | case IB_QPT_SMI: | |
615 | case IB_QPT_GSI: return MLX4_QP_ST_MLX; | |
616 | default: return -1; | |
617 | } | |
618 | } | |
619 | ||
65adfa91 | 620 | static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, const struct ib_qp_attr *attr, |
225c7b1f RD |
621 | int attr_mask) |
622 | { | |
623 | u8 dest_rd_atomic; | |
624 | u32 access_flags; | |
625 | u32 hw_access_flags = 0; | |
626 | ||
627 | if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) | |
628 | dest_rd_atomic = attr->max_dest_rd_atomic; | |
629 | else | |
630 | dest_rd_atomic = qp->resp_depth; | |
631 | ||
632 | if (attr_mask & IB_QP_ACCESS_FLAGS) | |
633 | access_flags = attr->qp_access_flags; | |
634 | else | |
635 | access_flags = qp->atomic_rd_en; | |
636 | ||
637 | if (!dest_rd_atomic) | |
638 | access_flags &= IB_ACCESS_REMOTE_WRITE; | |
639 | ||
640 | if (access_flags & IB_ACCESS_REMOTE_READ) | |
641 | hw_access_flags |= MLX4_QP_BIT_RRE; | |
642 | if (access_flags & IB_ACCESS_REMOTE_ATOMIC) | |
643 | hw_access_flags |= MLX4_QP_BIT_RAE; | |
644 | if (access_flags & IB_ACCESS_REMOTE_WRITE) | |
645 | hw_access_flags |= MLX4_QP_BIT_RWE; | |
646 | ||
647 | return cpu_to_be32(hw_access_flags); | |
648 | } | |
649 | ||
65adfa91 | 650 | static void store_sqp_attrs(struct mlx4_ib_sqp *sqp, const struct ib_qp_attr *attr, |
225c7b1f RD |
651 | int attr_mask) |
652 | { | |
653 | if (attr_mask & IB_QP_PKEY_INDEX) | |
654 | sqp->pkey_index = attr->pkey_index; | |
655 | if (attr_mask & IB_QP_QKEY) | |
656 | sqp->qkey = attr->qkey; | |
657 | if (attr_mask & IB_QP_SQ_PSN) | |
658 | sqp->send_psn = attr->sq_psn; | |
659 | } | |
660 | ||
661 | static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port) | |
662 | { | |
663 | path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6); | |
664 | } | |
665 | ||
65adfa91 | 666 | static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah, |
225c7b1f RD |
667 | struct mlx4_qp_path *path, u8 port) |
668 | { | |
669 | path->grh_mylmc = ah->src_path_bits & 0x7f; | |
670 | path->rlid = cpu_to_be16(ah->dlid); | |
671 | if (ah->static_rate) { | |
672 | path->static_rate = ah->static_rate + MLX4_STAT_RATE_OFFSET; | |
673 | while (path->static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET && | |
674 | !(1 << path->static_rate & dev->dev->caps.stat_rate_support)) | |
675 | --path->static_rate; | |
676 | } else | |
677 | path->static_rate = 0; | |
678 | path->counter_index = 0xff; | |
679 | ||
680 | if (ah->ah_flags & IB_AH_GRH) { | |
5ae2a7a8 | 681 | if (ah->grh.sgid_index >= dev->dev->caps.gid_table_len[port]) { |
225c7b1f | 682 | printk(KERN_ERR "sgid_index (%u) too large. max is %d\n", |
5ae2a7a8 | 683 | ah->grh.sgid_index, dev->dev->caps.gid_table_len[port] - 1); |
225c7b1f RD |
684 | return -1; |
685 | } | |
686 | ||
687 | path->grh_mylmc |= 1 << 7; | |
688 | path->mgid_index = ah->grh.sgid_index; | |
689 | path->hop_limit = ah->grh.hop_limit; | |
690 | path->tclass_flowlabel = | |
691 | cpu_to_be32((ah->grh.traffic_class << 20) | | |
692 | (ah->grh.flow_label)); | |
693 | memcpy(path->rgid, ah->grh.dgid.raw, 16); | |
694 | } | |
695 | ||
696 | path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | | |
697 | ((port - 1) << 6) | ((ah->sl & 0xf) << 2); | |
698 | ||
699 | return 0; | |
700 | } | |
701 | ||
65adfa91 MT |
702 | static int __mlx4_ib_modify_qp(struct ib_qp *ibqp, |
703 | const struct ib_qp_attr *attr, int attr_mask, | |
704 | enum ib_qp_state cur_state, enum ib_qp_state new_state) | |
225c7b1f RD |
705 | { |
706 | struct mlx4_ib_dev *dev = to_mdev(ibqp->device); | |
707 | struct mlx4_ib_qp *qp = to_mqp(ibqp); | |
708 | struct mlx4_qp_context *context; | |
709 | enum mlx4_qp_optpar optpar = 0; | |
225c7b1f RD |
710 | int sqd_event; |
711 | int err = -EINVAL; | |
712 | ||
713 | context = kzalloc(sizeof *context, GFP_KERNEL); | |
714 | if (!context) | |
715 | return -ENOMEM; | |
716 | ||
225c7b1f RD |
717 | context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) | |
718 | (to_mlx4_st(ibqp->qp_type) << 16)); | |
719 | context->flags |= cpu_to_be32(1 << 8); /* DE? */ | |
720 | ||
721 | if (!(attr_mask & IB_QP_PATH_MIG_STATE)) | |
722 | context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11); | |
723 | else { | |
724 | optpar |= MLX4_QP_OPTPAR_PM_STATE; | |
725 | switch (attr->path_mig_state) { | |
726 | case IB_MIG_MIGRATED: | |
727 | context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11); | |
728 | break; | |
729 | case IB_MIG_REARM: | |
730 | context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11); | |
731 | break; | |
732 | case IB_MIG_ARMED: | |
733 | context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11); | |
734 | break; | |
735 | } | |
736 | } | |
737 | ||
738 | if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI || | |
739 | ibqp->qp_type == IB_QPT_UD) | |
740 | context->mtu_msgmax = (IB_MTU_4096 << 5) | 11; | |
741 | else if (attr_mask & IB_QP_PATH_MTU) { | |
742 | if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) { | |
743 | printk(KERN_ERR "path MTU (%u) is invalid\n", | |
744 | attr->path_mtu); | |
745 | return -EINVAL; | |
746 | } | |
747 | context->mtu_msgmax = (attr->path_mtu << 5) | 31; | |
748 | } | |
749 | ||
0e6e7416 RD |
750 | if (qp->rq.wqe_cnt) |
751 | context->rq_size_stride = ilog2(qp->rq.wqe_cnt) << 3; | |
225c7b1f RD |
752 | context->rq_size_stride |= qp->rq.wqe_shift - 4; |
753 | ||
0e6e7416 RD |
754 | if (qp->sq.wqe_cnt) |
755 | context->sq_size_stride = ilog2(qp->sq.wqe_cnt) << 3; | |
225c7b1f RD |
756 | context->sq_size_stride |= qp->sq.wqe_shift - 4; |
757 | ||
0e6e7416 RD |
758 | if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) |
759 | context->sq_size_stride |= !!qp->sq_no_prefetch << 7; | |
760 | ||
225c7b1f RD |
761 | if (qp->ibqp.uobject) |
762 | context->usr_page = cpu_to_be32(to_mucontext(ibqp->uobject->context)->uar.index); | |
763 | else | |
764 | context->usr_page = cpu_to_be32(dev->priv_uar.index); | |
765 | ||
766 | if (attr_mask & IB_QP_DEST_QPN) | |
767 | context->remote_qpn = cpu_to_be32(attr->dest_qp_num); | |
768 | ||
769 | if (attr_mask & IB_QP_PORT) { | |
770 | if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD && | |
771 | !(attr_mask & IB_QP_AV)) { | |
772 | mlx4_set_sched(&context->pri_path, attr->port_num); | |
773 | optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE; | |
774 | } | |
775 | } | |
776 | ||
777 | if (attr_mask & IB_QP_PKEY_INDEX) { | |
778 | context->pri_path.pkey_index = attr->pkey_index; | |
779 | optpar |= MLX4_QP_OPTPAR_PKEY_INDEX; | |
780 | } | |
781 | ||
225c7b1f RD |
782 | if (attr_mask & IB_QP_AV) { |
783 | if (mlx4_set_path(dev, &attr->ah_attr, &context->pri_path, | |
784 | attr_mask & IB_QP_PORT ? attr->port_num : qp->port)) { | |
785 | err = -EINVAL; | |
786 | goto out; | |
787 | } | |
788 | ||
789 | optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH | | |
790 | MLX4_QP_OPTPAR_SCHED_QUEUE); | |
791 | } | |
792 | ||
793 | if (attr_mask & IB_QP_TIMEOUT) { | |
794 | context->pri_path.ackto = attr->timeout << 3; | |
795 | optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT; | |
796 | } | |
797 | ||
798 | if (attr_mask & IB_QP_ALT_PATH) { | |
225c7b1f RD |
799 | if (attr->alt_port_num == 0 || |
800 | attr->alt_port_num > dev->dev->caps.num_ports) | |
801 | return -EINVAL; | |
802 | ||
5ae2a7a8 RD |
803 | if (attr->alt_pkey_index >= |
804 | dev->dev->caps.pkey_table_len[attr->alt_port_num]) | |
805 | return -EINVAL; | |
806 | ||
225c7b1f RD |
807 | if (mlx4_set_path(dev, &attr->alt_ah_attr, &context->alt_path, |
808 | attr->alt_port_num)) | |
809 | return -EINVAL; | |
810 | ||
811 | context->alt_path.pkey_index = attr->alt_pkey_index; | |
812 | context->alt_path.ackto = attr->alt_timeout << 3; | |
813 | optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH; | |
814 | } | |
815 | ||
816 | context->pd = cpu_to_be32(to_mpd(ibqp->pd)->pdn); | |
817 | context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28); | |
57f01b53 JM |
818 | |
819 | if (attr_mask & IB_QP_RNR_RETRY) { | |
820 | context->params1 |= cpu_to_be32(attr->rnr_retry << 13); | |
821 | optpar |= MLX4_QP_OPTPAR_RNR_RETRY; | |
822 | } | |
823 | ||
225c7b1f RD |
824 | if (attr_mask & IB_QP_RETRY_CNT) { |
825 | context->params1 |= cpu_to_be32(attr->retry_cnt << 16); | |
826 | optpar |= MLX4_QP_OPTPAR_RETRY_COUNT; | |
827 | } | |
828 | ||
829 | if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) { | |
830 | if (attr->max_rd_atomic) | |
831 | context->params1 |= | |
832 | cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21); | |
833 | optpar |= MLX4_QP_OPTPAR_SRA_MAX; | |
834 | } | |
835 | ||
836 | if (attr_mask & IB_QP_SQ_PSN) | |
837 | context->next_send_psn = cpu_to_be32(attr->sq_psn); | |
838 | ||
839 | context->cqn_send = cpu_to_be32(to_mcq(ibqp->send_cq)->mcq.cqn); | |
840 | ||
841 | if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) { | |
842 | if (attr->max_dest_rd_atomic) | |
843 | context->params2 |= | |
844 | cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21); | |
845 | optpar |= MLX4_QP_OPTPAR_RRA_MAX; | |
846 | } | |
847 | ||
848 | if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) { | |
849 | context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask); | |
850 | optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE; | |
851 | } | |
852 | ||
853 | if (ibqp->srq) | |
854 | context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC); | |
855 | ||
856 | if (attr_mask & IB_QP_MIN_RNR_TIMER) { | |
857 | context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24); | |
858 | optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT; | |
859 | } | |
860 | if (attr_mask & IB_QP_RQ_PSN) | |
861 | context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn); | |
862 | ||
863 | context->cqn_recv = cpu_to_be32(to_mcq(ibqp->recv_cq)->mcq.cqn); | |
864 | ||
865 | if (attr_mask & IB_QP_QKEY) { | |
866 | context->qkey = cpu_to_be32(attr->qkey); | |
867 | optpar |= MLX4_QP_OPTPAR_Q_KEY; | |
868 | } | |
869 | ||
870 | if (ibqp->srq) | |
871 | context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn); | |
872 | ||
02d89b87 | 873 | if (!ibqp->srq && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) |
225c7b1f RD |
874 | context->db_rec_addr = cpu_to_be64(qp->db.dma); |
875 | ||
876 | if (cur_state == IB_QPS_INIT && | |
877 | new_state == IB_QPS_RTR && | |
878 | (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI || | |
879 | ibqp->qp_type == IB_QPT_UD)) { | |
880 | context->pri_path.sched_queue = (qp->port - 1) << 6; | |
881 | if (is_qp0(dev, qp)) | |
882 | context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE; | |
883 | else | |
884 | context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE; | |
885 | } | |
886 | ||
887 | if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD && | |
888 | attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify) | |
889 | sqd_event = 1; | |
890 | else | |
891 | sqd_event = 0; | |
892 | ||
c0be5fb5 EC |
893 | /* |
894 | * Before passing a kernel QP to the HW, make sure that the | |
0e6e7416 RD |
895 | * ownership bits of the send queue are set and the SQ |
896 | * headroom is stamped so that the hardware doesn't start | |
897 | * processing stale work requests. | |
c0be5fb5 EC |
898 | */ |
899 | if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) { | |
900 | struct mlx4_wqe_ctrl_seg *ctrl; | |
901 | int i; | |
902 | ||
0e6e7416 | 903 | for (i = 0; i < qp->sq.wqe_cnt; ++i) { |
c0be5fb5 EC |
904 | ctrl = get_send_wqe(qp, i); |
905 | ctrl->owner_opcode = cpu_to_be32(1 << 31); | |
0e6e7416 RD |
906 | |
907 | stamp_send_wqe(qp, i); | |
c0be5fb5 EC |
908 | } |
909 | } | |
910 | ||
225c7b1f RD |
911 | err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state), |
912 | to_mlx4_state(new_state), context, optpar, | |
913 | sqd_event, &qp->mqp); | |
914 | if (err) | |
915 | goto out; | |
916 | ||
917 | qp->state = new_state; | |
918 | ||
919 | if (attr_mask & IB_QP_ACCESS_FLAGS) | |
920 | qp->atomic_rd_en = attr->qp_access_flags; | |
921 | if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) | |
922 | qp->resp_depth = attr->max_dest_rd_atomic; | |
923 | if (attr_mask & IB_QP_PORT) | |
924 | qp->port = attr->port_num; | |
925 | if (attr_mask & IB_QP_ALT_PATH) | |
926 | qp->alt_port = attr->alt_port_num; | |
927 | ||
928 | if (is_sqp(dev, qp)) | |
929 | store_sqp_attrs(to_msqp(qp), attr, attr_mask); | |
930 | ||
931 | /* | |
932 | * If we moved QP0 to RTR, bring the IB link up; if we moved | |
933 | * QP0 to RESET or ERROR, bring the link back down. | |
934 | */ | |
935 | if (is_qp0(dev, qp)) { | |
936 | if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR) | |
5ae2a7a8 RD |
937 | if (mlx4_INIT_PORT(dev->dev, qp->port)) |
938 | printk(KERN_WARNING "INIT_PORT failed for port %d\n", | |
939 | qp->port); | |
225c7b1f RD |
940 | |
941 | if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR && | |
942 | (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR)) | |
943 | mlx4_CLOSE_PORT(dev->dev, qp->port); | |
944 | } | |
945 | ||
946 | /* | |
947 | * If we moved a kernel QP to RESET, clean up all old CQ | |
948 | * entries and reinitialize the QP. | |
949 | */ | |
950 | if (new_state == IB_QPS_RESET && !ibqp->uobject) { | |
951 | mlx4_ib_cq_clean(to_mcq(ibqp->recv_cq), qp->mqp.qpn, | |
952 | ibqp->srq ? to_msrq(ibqp->srq): NULL); | |
953 | if (ibqp->send_cq != ibqp->recv_cq) | |
954 | mlx4_ib_cq_clean(to_mcq(ibqp->send_cq), qp->mqp.qpn, NULL); | |
955 | ||
956 | qp->rq.head = 0; | |
957 | qp->rq.tail = 0; | |
958 | qp->sq.head = 0; | |
959 | qp->sq.tail = 0; | |
02d89b87 RD |
960 | if (!ibqp->srq) |
961 | *qp->db.db = 0; | |
225c7b1f RD |
962 | } |
963 | ||
964 | out: | |
225c7b1f RD |
965 | kfree(context); |
966 | return err; | |
967 | } | |
968 | ||
65adfa91 MT |
969 | static const struct ib_qp_attr mlx4_ib_qp_attr = { .port_num = 1 }; |
970 | static const int mlx4_ib_qp_attr_mask_table[IB_QPT_UD + 1] = { | |
971 | [IB_QPT_UD] = (IB_QP_PKEY_INDEX | | |
972 | IB_QP_PORT | | |
973 | IB_QP_QKEY), | |
974 | [IB_QPT_UC] = (IB_QP_PKEY_INDEX | | |
975 | IB_QP_PORT | | |
976 | IB_QP_ACCESS_FLAGS), | |
977 | [IB_QPT_RC] = (IB_QP_PKEY_INDEX | | |
978 | IB_QP_PORT | | |
979 | IB_QP_ACCESS_FLAGS), | |
980 | [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | | |
981 | IB_QP_QKEY), | |
982 | [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | | |
983 | IB_QP_QKEY), | |
984 | }; | |
985 | ||
986 | int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, | |
987 | int attr_mask, struct ib_udata *udata) | |
988 | { | |
989 | struct mlx4_ib_dev *dev = to_mdev(ibqp->device); | |
990 | struct mlx4_ib_qp *qp = to_mqp(ibqp); | |
991 | enum ib_qp_state cur_state, new_state; | |
992 | int err = -EINVAL; | |
993 | ||
994 | mutex_lock(&qp->mutex); | |
995 | ||
996 | cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state; | |
997 | new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state; | |
998 | ||
999 | if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, attr_mask)) | |
1000 | goto out; | |
1001 | ||
65adfa91 MT |
1002 | if ((attr_mask & IB_QP_PORT) && |
1003 | (attr->port_num == 0 || attr->port_num > dev->dev->caps.num_ports)) { | |
1004 | goto out; | |
1005 | } | |
1006 | ||
5ae2a7a8 RD |
1007 | if (attr_mask & IB_QP_PKEY_INDEX) { |
1008 | int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port; | |
1009 | if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) | |
1010 | goto out; | |
1011 | } | |
1012 | ||
65adfa91 MT |
1013 | if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC && |
1014 | attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) { | |
1015 | goto out; | |
1016 | } | |
1017 | ||
1018 | if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC && | |
1019 | attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) { | |
1020 | goto out; | |
1021 | } | |
1022 | ||
1023 | if (cur_state == new_state && cur_state == IB_QPS_RESET) { | |
1024 | err = 0; | |
1025 | goto out; | |
1026 | } | |
1027 | ||
1028 | if (cur_state == IB_QPS_RESET && new_state == IB_QPS_ERR) { | |
1029 | err = __mlx4_ib_modify_qp(ibqp, &mlx4_ib_qp_attr, | |
1030 | mlx4_ib_qp_attr_mask_table[ibqp->qp_type], | |
1031 | IB_QPS_RESET, IB_QPS_INIT); | |
1032 | if (err) | |
1033 | goto out; | |
1034 | cur_state = IB_QPS_INIT; | |
1035 | } | |
1036 | ||
1037 | err = __mlx4_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state); | |
1038 | ||
1039 | out: | |
1040 | mutex_unlock(&qp->mutex); | |
1041 | return err; | |
1042 | } | |
1043 | ||
225c7b1f RD |
1044 | static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr, |
1045 | void *wqe) | |
1046 | { | |
1047 | struct ib_device *ib_dev = &to_mdev(sqp->qp.ibqp.device)->ib_dev; | |
1048 | struct mlx4_wqe_mlx_seg *mlx = wqe; | |
1049 | struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx; | |
1050 | struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah); | |
1051 | u16 pkey; | |
1052 | int send_size; | |
1053 | int header_size; | |
e61ef241 | 1054 | int spc; |
225c7b1f RD |
1055 | int i; |
1056 | ||
1057 | send_size = 0; | |
1058 | for (i = 0; i < wr->num_sge; ++i) | |
1059 | send_size += wr->sg_list[i].length; | |
1060 | ||
1061 | ib_ud_header_init(send_size, mlx4_ib_ah_grh_present(ah), &sqp->ud_header); | |
1062 | ||
1063 | sqp->ud_header.lrh.service_level = | |
1064 | be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 28; | |
1065 | sqp->ud_header.lrh.destination_lid = ah->av.dlid; | |
1066 | sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.g_slid & 0x7f); | |
1067 | if (mlx4_ib_ah_grh_present(ah)) { | |
1068 | sqp->ud_header.grh.traffic_class = | |
1069 | (be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 20) & 0xff; | |
1070 | sqp->ud_header.grh.flow_label = | |
1071 | ah->av.sl_tclass_flowlabel & cpu_to_be32(0xfffff); | |
15261303 | 1072 | sqp->ud_header.grh.hop_limit = ah->av.hop_limit; |
225c7b1f RD |
1073 | ib_get_cached_gid(ib_dev, be32_to_cpu(ah->av.port_pd) >> 24, |
1074 | ah->av.gid_index, &sqp->ud_header.grh.source_gid); | |
1075 | memcpy(sqp->ud_header.grh.destination_gid.raw, | |
1076 | ah->av.dgid, 16); | |
1077 | } | |
1078 | ||
1079 | mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE); | |
1080 | mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) | | |
1081 | (sqp->ud_header.lrh.destination_lid == | |
1082 | IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) | | |
1083 | (sqp->ud_header.lrh.service_level << 8)); | |
1084 | mlx->rlid = sqp->ud_header.lrh.destination_lid; | |
1085 | ||
1086 | switch (wr->opcode) { | |
1087 | case IB_WR_SEND: | |
1088 | sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY; | |
1089 | sqp->ud_header.immediate_present = 0; | |
1090 | break; | |
1091 | case IB_WR_SEND_WITH_IMM: | |
1092 | sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE; | |
1093 | sqp->ud_header.immediate_present = 1; | |
1094 | sqp->ud_header.immediate_data = wr->imm_data; | |
1095 | break; | |
1096 | default: | |
1097 | return -EINVAL; | |
1098 | } | |
1099 | ||
1100 | sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0; | |
1101 | if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE) | |
1102 | sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE; | |
1103 | sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED); | |
1104 | if (!sqp->qp.ibqp.qp_num) | |
1105 | ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey); | |
1106 | else | |
1107 | ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey); | |
1108 | sqp->ud_header.bth.pkey = cpu_to_be16(pkey); | |
1109 | sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn); | |
1110 | sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1)); | |
1111 | sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ? | |
1112 | sqp->qkey : wr->wr.ud.remote_qkey); | |
1113 | sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num); | |
1114 | ||
1115 | header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf); | |
1116 | ||
1117 | if (0) { | |
1118 | printk(KERN_ERR "built UD header of size %d:\n", header_size); | |
1119 | for (i = 0; i < header_size / 4; ++i) { | |
1120 | if (i % 8 == 0) | |
1121 | printk(" [%02x] ", i * 4); | |
1122 | printk(" %08x", | |
1123 | be32_to_cpu(((__be32 *) sqp->header_buf)[i])); | |
1124 | if ((i + 1) % 8 == 0) | |
1125 | printk("\n"); | |
1126 | } | |
1127 | printk("\n"); | |
1128 | } | |
1129 | ||
e61ef241 RD |
1130 | /* |
1131 | * Inline data segments may not cross a 64 byte boundary. If | |
1132 | * our UD header is bigger than the space available up to the | |
1133 | * next 64 byte boundary in the WQE, use two inline data | |
1134 | * segments to hold the UD header. | |
1135 | */ | |
1136 | spc = MLX4_INLINE_ALIGN - | |
1137 | ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1)); | |
1138 | if (header_size <= spc) { | |
1139 | inl->byte_count = cpu_to_be32(1 << 31 | header_size); | |
1140 | memcpy(inl + 1, sqp->header_buf, header_size); | |
1141 | i = 1; | |
1142 | } else { | |
1143 | inl->byte_count = cpu_to_be32(1 << 31 | spc); | |
1144 | memcpy(inl + 1, sqp->header_buf, spc); | |
1145 | ||
1146 | inl = (void *) (inl + 1) + spc; | |
1147 | memcpy(inl + 1, sqp->header_buf + spc, header_size - spc); | |
1148 | /* | |
1149 | * Need a barrier here to make sure all the data is | |
1150 | * visible before the byte_count field is set. | |
1151 | * Otherwise the HCA prefetcher could grab the 64-byte | |
1152 | * chunk with this inline segment and get a valid (!= | |
1153 | * 0xffffffff) byte count but stale data, and end up | |
1154 | * generating a packet with bad headers. | |
1155 | * | |
1156 | * The first inline segment's byte_count field doesn't | |
1157 | * need a barrier, because it comes after a | |
1158 | * control/MLX segment and therefore is at an offset | |
1159 | * of 16 mod 64. | |
1160 | */ | |
1161 | wmb(); | |
1162 | inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc)); | |
1163 | i = 2; | |
1164 | } | |
225c7b1f | 1165 | |
e61ef241 | 1166 | return ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16); |
225c7b1f RD |
1167 | } |
1168 | ||
1169 | static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq) | |
1170 | { | |
1171 | unsigned cur; | |
1172 | struct mlx4_ib_cq *cq; | |
1173 | ||
1174 | cur = wq->head - wq->tail; | |
0e6e7416 | 1175 | if (likely(cur + nreq < wq->max_post)) |
225c7b1f RD |
1176 | return 0; |
1177 | ||
1178 | cq = to_mcq(ib_cq); | |
1179 | spin_lock(&cq->lock); | |
1180 | cur = wq->head - wq->tail; | |
1181 | spin_unlock(&cq->lock); | |
1182 | ||
0e6e7416 | 1183 | return cur + nreq >= wq->max_post; |
225c7b1f RD |
1184 | } |
1185 | ||
1186 | int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, | |
1187 | struct ib_send_wr **bad_wr) | |
1188 | { | |
1189 | struct mlx4_ib_qp *qp = to_mqp(ibqp); | |
1190 | void *wqe; | |
1191 | struct mlx4_wqe_ctrl_seg *ctrl; | |
1192 | unsigned long flags; | |
1193 | int nreq; | |
1194 | int err = 0; | |
1195 | int ind; | |
1196 | int size; | |
1197 | int i; | |
1198 | ||
1199 | spin_lock_irqsave(&qp->rq.lock, flags); | |
1200 | ||
1201 | ind = qp->sq.head; | |
1202 | ||
1203 | for (nreq = 0; wr; ++nreq, wr = wr->next) { | |
1204 | if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) { | |
1205 | err = -ENOMEM; | |
1206 | *bad_wr = wr; | |
1207 | goto out; | |
1208 | } | |
1209 | ||
1210 | if (unlikely(wr->num_sge > qp->sq.max_gs)) { | |
1211 | err = -EINVAL; | |
1212 | *bad_wr = wr; | |
1213 | goto out; | |
1214 | } | |
1215 | ||
0e6e7416 RD |
1216 | ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1)); |
1217 | qp->sq.wrid[ind & (qp->sq.wqe_cnt - 1)] = wr->wr_id; | |
225c7b1f RD |
1218 | |
1219 | ctrl->srcrb_flags = | |
1220 | (wr->send_flags & IB_SEND_SIGNALED ? | |
1221 | cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) | | |
1222 | (wr->send_flags & IB_SEND_SOLICITED ? | |
1223 | cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) | | |
1224 | qp->sq_signal_bits; | |
1225 | ||
1226 | if (wr->opcode == IB_WR_SEND_WITH_IMM || | |
1227 | wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) | |
1228 | ctrl->imm = wr->imm_data; | |
1229 | else | |
1230 | ctrl->imm = 0; | |
1231 | ||
1232 | wqe += sizeof *ctrl; | |
1233 | size = sizeof *ctrl / 16; | |
1234 | ||
1235 | switch (ibqp->qp_type) { | |
1236 | case IB_QPT_RC: | |
1237 | case IB_QPT_UC: | |
1238 | switch (wr->opcode) { | |
1239 | case IB_WR_ATOMIC_CMP_AND_SWP: | |
1240 | case IB_WR_ATOMIC_FETCH_AND_ADD: | |
1241 | ((struct mlx4_wqe_raddr_seg *) wqe)->raddr = | |
1242 | cpu_to_be64(wr->wr.atomic.remote_addr); | |
1243 | ((struct mlx4_wqe_raddr_seg *) wqe)->rkey = | |
1244 | cpu_to_be32(wr->wr.atomic.rkey); | |
1245 | ((struct mlx4_wqe_raddr_seg *) wqe)->reserved = 0; | |
1246 | ||
1247 | wqe += sizeof (struct mlx4_wqe_raddr_seg); | |
1248 | ||
1249 | if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) { | |
1250 | ((struct mlx4_wqe_atomic_seg *) wqe)->swap_add = | |
1251 | cpu_to_be64(wr->wr.atomic.swap); | |
1252 | ((struct mlx4_wqe_atomic_seg *) wqe)->compare = | |
1253 | cpu_to_be64(wr->wr.atomic.compare_add); | |
1254 | } else { | |
1255 | ((struct mlx4_wqe_atomic_seg *) wqe)->swap_add = | |
1256 | cpu_to_be64(wr->wr.atomic.compare_add); | |
1257 | ((struct mlx4_wqe_atomic_seg *) wqe)->compare = 0; | |
1258 | } | |
1259 | ||
1260 | wqe += sizeof (struct mlx4_wqe_atomic_seg); | |
1261 | size += (sizeof (struct mlx4_wqe_raddr_seg) + | |
1262 | sizeof (struct mlx4_wqe_atomic_seg)) / 16; | |
1263 | ||
1264 | break; | |
1265 | ||
1266 | case IB_WR_RDMA_READ: | |
1267 | case IB_WR_RDMA_WRITE: | |
1268 | case IB_WR_RDMA_WRITE_WITH_IMM: | |
1269 | ((struct mlx4_wqe_raddr_seg *) wqe)->raddr = | |
1270 | cpu_to_be64(wr->wr.rdma.remote_addr); | |
1271 | ((struct mlx4_wqe_raddr_seg *) wqe)->rkey = | |
1272 | cpu_to_be32(wr->wr.rdma.rkey); | |
1273 | ((struct mlx4_wqe_raddr_seg *) wqe)->reserved = 0; | |
1274 | ||
1275 | wqe += sizeof (struct mlx4_wqe_raddr_seg); | |
1276 | size += sizeof (struct mlx4_wqe_raddr_seg) / 16; | |
1277 | ||
1278 | break; | |
1279 | ||
1280 | default: | |
1281 | /* No extra segments required for sends */ | |
1282 | break; | |
1283 | } | |
1284 | break; | |
1285 | ||
1286 | case IB_QPT_UD: | |
1287 | memcpy(((struct mlx4_wqe_datagram_seg *) wqe)->av, | |
1288 | &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av)); | |
1289 | ((struct mlx4_wqe_datagram_seg *) wqe)->dqpn = | |
1290 | cpu_to_be32(wr->wr.ud.remote_qpn); | |
1291 | ((struct mlx4_wqe_datagram_seg *) wqe)->qkey = | |
1292 | cpu_to_be32(wr->wr.ud.remote_qkey); | |
1293 | ||
1294 | wqe += sizeof (struct mlx4_wqe_datagram_seg); | |
1295 | size += sizeof (struct mlx4_wqe_datagram_seg) / 16; | |
1296 | break; | |
1297 | ||
1298 | case IB_QPT_SMI: | |
1299 | case IB_QPT_GSI: | |
1300 | err = build_mlx_header(to_msqp(qp), wr, ctrl); | |
1301 | if (err < 0) { | |
1302 | *bad_wr = wr; | |
1303 | goto out; | |
1304 | } | |
1305 | wqe += err; | |
1306 | size += err / 16; | |
1307 | ||
1308 | err = 0; | |
1309 | break; | |
1310 | ||
1311 | default: | |
1312 | break; | |
1313 | } | |
1314 | ||
1315 | for (i = 0; i < wr->num_sge; ++i) { | |
1316 | ((struct mlx4_wqe_data_seg *) wqe)->byte_count = | |
1317 | cpu_to_be32(wr->sg_list[i].length); | |
1318 | ((struct mlx4_wqe_data_seg *) wqe)->lkey = | |
1319 | cpu_to_be32(wr->sg_list[i].lkey); | |
1320 | ((struct mlx4_wqe_data_seg *) wqe)->addr = | |
1321 | cpu_to_be64(wr->sg_list[i].addr); | |
1322 | ||
1323 | wqe += sizeof (struct mlx4_wqe_data_seg); | |
1324 | size += sizeof (struct mlx4_wqe_data_seg) / 16; | |
1325 | } | |
1326 | ||
1327 | /* Add one more inline data segment for ICRC for MLX sends */ | |
1328 | if (qp->ibqp.qp_type == IB_QPT_SMI || qp->ibqp.qp_type == IB_QPT_GSI) { | |
1329 | ((struct mlx4_wqe_inline_seg *) wqe)->byte_count = | |
1330 | cpu_to_be32((1 << 31) | 4); | |
1331 | ((u32 *) wqe)[1] = 0; | |
1332 | wqe += sizeof (struct mlx4_wqe_data_seg); | |
1333 | size += sizeof (struct mlx4_wqe_data_seg) / 16; | |
1334 | } | |
1335 | ||
1336 | ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ? | |
1337 | MLX4_WQE_CTRL_FENCE : 0) | size; | |
1338 | ||
1339 | /* | |
1340 | * Make sure descriptor is fully written before | |
1341 | * setting ownership bit (because HW can start | |
1342 | * executing as soon as we do). | |
1343 | */ | |
1344 | wmb(); | |
1345 | ||
59b0ed12 | 1346 | if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) { |
225c7b1f RD |
1347 | err = -EINVAL; |
1348 | goto out; | |
1349 | } | |
1350 | ||
1351 | ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] | | |
0e6e7416 RD |
1352 | (ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0); |
1353 | ||
1354 | /* | |
1355 | * We can improve latency by not stamping the last | |
1356 | * send queue WQE until after ringing the doorbell, so | |
1357 | * only stamp here if there are still more WQEs to post. | |
1358 | */ | |
1359 | if (wr->next) | |
1360 | stamp_send_wqe(qp, (ind + qp->sq_spare_wqes) & | |
1361 | (qp->sq.wqe_cnt - 1)); | |
225c7b1f RD |
1362 | |
1363 | ++ind; | |
1364 | } | |
1365 | ||
1366 | out: | |
1367 | if (likely(nreq)) { | |
1368 | qp->sq.head += nreq; | |
1369 | ||
1370 | /* | |
1371 | * Make sure that descriptors are written before | |
1372 | * doorbell record. | |
1373 | */ | |
1374 | wmb(); | |
1375 | ||
1376 | writel(qp->doorbell_qpn, | |
1377 | to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL); | |
1378 | ||
1379 | /* | |
1380 | * Make sure doorbells don't leak out of SQ spinlock | |
1381 | * and reach the HCA out of order. | |
1382 | */ | |
1383 | mmiowb(); | |
0e6e7416 RD |
1384 | |
1385 | stamp_send_wqe(qp, (ind + qp->sq_spare_wqes - 1) & | |
1386 | (qp->sq.wqe_cnt - 1)); | |
225c7b1f RD |
1387 | } |
1388 | ||
1389 | spin_unlock_irqrestore(&qp->rq.lock, flags); | |
1390 | ||
1391 | return err; | |
1392 | } | |
1393 | ||
1394 | int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr, | |
1395 | struct ib_recv_wr **bad_wr) | |
1396 | { | |
1397 | struct mlx4_ib_qp *qp = to_mqp(ibqp); | |
1398 | struct mlx4_wqe_data_seg *scat; | |
1399 | unsigned long flags; | |
1400 | int err = 0; | |
1401 | int nreq; | |
1402 | int ind; | |
1403 | int i; | |
1404 | ||
1405 | spin_lock_irqsave(&qp->rq.lock, flags); | |
1406 | ||
0e6e7416 | 1407 | ind = qp->rq.head & (qp->rq.wqe_cnt - 1); |
225c7b1f RD |
1408 | |
1409 | for (nreq = 0; wr; ++nreq, wr = wr->next) { | |
1410 | if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.send_cq)) { | |
1411 | err = -ENOMEM; | |
1412 | *bad_wr = wr; | |
1413 | goto out; | |
1414 | } | |
1415 | ||
1416 | if (unlikely(wr->num_sge > qp->rq.max_gs)) { | |
1417 | err = -EINVAL; | |
1418 | *bad_wr = wr; | |
1419 | goto out; | |
1420 | } | |
1421 | ||
1422 | scat = get_recv_wqe(qp, ind); | |
1423 | ||
1424 | for (i = 0; i < wr->num_sge; ++i) { | |
1425 | scat[i].byte_count = cpu_to_be32(wr->sg_list[i].length); | |
1426 | scat[i].lkey = cpu_to_be32(wr->sg_list[i].lkey); | |
1427 | scat[i].addr = cpu_to_be64(wr->sg_list[i].addr); | |
1428 | } | |
1429 | ||
1430 | if (i < qp->rq.max_gs) { | |
1431 | scat[i].byte_count = 0; | |
1432 | scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY); | |
1433 | scat[i].addr = 0; | |
1434 | } | |
1435 | ||
1436 | qp->rq.wrid[ind] = wr->wr_id; | |
1437 | ||
0e6e7416 | 1438 | ind = (ind + 1) & (qp->rq.wqe_cnt - 1); |
225c7b1f RD |
1439 | } |
1440 | ||
1441 | out: | |
1442 | if (likely(nreq)) { | |
1443 | qp->rq.head += nreq; | |
1444 | ||
1445 | /* | |
1446 | * Make sure that descriptors are written before | |
1447 | * doorbell record. | |
1448 | */ | |
1449 | wmb(); | |
1450 | ||
1451 | *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff); | |
1452 | } | |
1453 | ||
1454 | spin_unlock_irqrestore(&qp->rq.lock, flags); | |
1455 | ||
1456 | return err; | |
1457 | } | |
6a775e2b JM |
1458 | |
1459 | static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state) | |
1460 | { | |
1461 | switch (mlx4_state) { | |
1462 | case MLX4_QP_STATE_RST: return IB_QPS_RESET; | |
1463 | case MLX4_QP_STATE_INIT: return IB_QPS_INIT; | |
1464 | case MLX4_QP_STATE_RTR: return IB_QPS_RTR; | |
1465 | case MLX4_QP_STATE_RTS: return IB_QPS_RTS; | |
1466 | case MLX4_QP_STATE_SQ_DRAINING: | |
1467 | case MLX4_QP_STATE_SQD: return IB_QPS_SQD; | |
1468 | case MLX4_QP_STATE_SQER: return IB_QPS_SQE; | |
1469 | case MLX4_QP_STATE_ERR: return IB_QPS_ERR; | |
1470 | default: return -1; | |
1471 | } | |
1472 | } | |
1473 | ||
1474 | static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state) | |
1475 | { | |
1476 | switch (mlx4_mig_state) { | |
1477 | case MLX4_QP_PM_ARMED: return IB_MIG_ARMED; | |
1478 | case MLX4_QP_PM_REARM: return IB_MIG_REARM; | |
1479 | case MLX4_QP_PM_MIGRATED: return IB_MIG_MIGRATED; | |
1480 | default: return -1; | |
1481 | } | |
1482 | } | |
1483 | ||
1484 | static int to_ib_qp_access_flags(int mlx4_flags) | |
1485 | { | |
1486 | int ib_flags = 0; | |
1487 | ||
1488 | if (mlx4_flags & MLX4_QP_BIT_RRE) | |
1489 | ib_flags |= IB_ACCESS_REMOTE_READ; | |
1490 | if (mlx4_flags & MLX4_QP_BIT_RWE) | |
1491 | ib_flags |= IB_ACCESS_REMOTE_WRITE; | |
1492 | if (mlx4_flags & MLX4_QP_BIT_RAE) | |
1493 | ib_flags |= IB_ACCESS_REMOTE_ATOMIC; | |
1494 | ||
1495 | return ib_flags; | |
1496 | } | |
1497 | ||
1498 | static void to_ib_ah_attr(struct mlx4_dev *dev, struct ib_ah_attr *ib_ah_attr, | |
1499 | struct mlx4_qp_path *path) | |
1500 | { | |
8fcea95a | 1501 | memset(ib_ah_attr, 0, sizeof *ib_ah_attr); |
6a775e2b JM |
1502 | ib_ah_attr->port_num = path->sched_queue & 0x40 ? 2 : 1; |
1503 | ||
1504 | if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports) | |
1505 | return; | |
1506 | ||
1507 | ib_ah_attr->dlid = be16_to_cpu(path->rlid); | |
1508 | ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf; | |
1509 | ib_ah_attr->src_path_bits = path->grh_mylmc & 0x7f; | |
1510 | ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0; | |
1511 | ib_ah_attr->ah_flags = (path->grh_mylmc & (1 << 7)) ? IB_AH_GRH : 0; | |
1512 | if (ib_ah_attr->ah_flags) { | |
1513 | ib_ah_attr->grh.sgid_index = path->mgid_index; | |
1514 | ib_ah_attr->grh.hop_limit = path->hop_limit; | |
1515 | ib_ah_attr->grh.traffic_class = | |
1516 | (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff; | |
1517 | ib_ah_attr->grh.flow_label = | |
586bb586 | 1518 | be32_to_cpu(path->tclass_flowlabel) & 0xfffff; |
6a775e2b JM |
1519 | memcpy(ib_ah_attr->grh.dgid.raw, |
1520 | path->rgid, sizeof ib_ah_attr->grh.dgid.raw); | |
1521 | } | |
1522 | } | |
1523 | ||
1524 | int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask, | |
1525 | struct ib_qp_init_attr *qp_init_attr) | |
1526 | { | |
1527 | struct mlx4_ib_dev *dev = to_mdev(ibqp->device); | |
1528 | struct mlx4_ib_qp *qp = to_mqp(ibqp); | |
1529 | struct mlx4_qp_context context; | |
1530 | int mlx4_state; | |
1531 | int err; | |
1532 | ||
1533 | if (qp->state == IB_QPS_RESET) { | |
1534 | qp_attr->qp_state = IB_QPS_RESET; | |
1535 | goto done; | |
1536 | } | |
1537 | ||
1538 | err = mlx4_qp_query(dev->dev, &qp->mqp, &context); | |
1539 | if (err) | |
1540 | return -EINVAL; | |
1541 | ||
1542 | mlx4_state = be32_to_cpu(context.flags) >> 28; | |
1543 | ||
1544 | qp_attr->qp_state = to_ib_qp_state(mlx4_state); | |
1545 | qp_attr->path_mtu = context.mtu_msgmax >> 5; | |
1546 | qp_attr->path_mig_state = | |
1547 | to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3); | |
1548 | qp_attr->qkey = be32_to_cpu(context.qkey); | |
1549 | qp_attr->rq_psn = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff; | |
1550 | qp_attr->sq_psn = be32_to_cpu(context.next_send_psn) & 0xffffff; | |
1551 | qp_attr->dest_qp_num = be32_to_cpu(context.remote_qpn) & 0xffffff; | |
1552 | qp_attr->qp_access_flags = | |
1553 | to_ib_qp_access_flags(be32_to_cpu(context.params2)); | |
1554 | ||
1555 | if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) { | |
1556 | to_ib_ah_attr(dev->dev, &qp_attr->ah_attr, &context.pri_path); | |
1557 | to_ib_ah_attr(dev->dev, &qp_attr->alt_ah_attr, &context.alt_path); | |
1558 | qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f; | |
1559 | qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num; | |
1560 | } | |
1561 | ||
1562 | qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f; | |
1c27cb71 JM |
1563 | if (qp_attr->qp_state == IB_QPS_INIT) |
1564 | qp_attr->port_num = qp->port; | |
1565 | else | |
1566 | qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1; | |
6a775e2b JM |
1567 | |
1568 | /* qp_attr->en_sqd_async_notify is only applicable in modify qp */ | |
1569 | qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING; | |
1570 | ||
1571 | qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7); | |
1572 | ||
1573 | qp_attr->max_dest_rd_atomic = | |
1574 | 1 << ((be32_to_cpu(context.params2) >> 21) & 0x7); | |
1575 | qp_attr->min_rnr_timer = | |
1576 | (be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f; | |
1577 | qp_attr->timeout = context.pri_path.ackto >> 3; | |
1578 | qp_attr->retry_cnt = (be32_to_cpu(context.params1) >> 16) & 0x7; | |
1579 | qp_attr->rnr_retry = (be32_to_cpu(context.params1) >> 13) & 0x7; | |
1580 | qp_attr->alt_timeout = context.alt_path.ackto >> 3; | |
1581 | ||
1582 | done: | |
1583 | qp_attr->cur_qp_state = qp_attr->qp_state; | |
7f5eb9bb RD |
1584 | qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt; |
1585 | qp_attr->cap.max_recv_sge = qp->rq.max_gs; | |
1586 | ||
6a775e2b | 1587 | if (!ibqp->uobject) { |
7f5eb9bb RD |
1588 | qp_attr->cap.max_send_wr = qp->sq.wqe_cnt; |
1589 | qp_attr->cap.max_send_sge = qp->sq.max_gs; | |
1590 | } else { | |
1591 | qp_attr->cap.max_send_wr = 0; | |
1592 | qp_attr->cap.max_send_sge = 0; | |
6a775e2b JM |
1593 | } |
1594 | ||
7f5eb9bb RD |
1595 | /* |
1596 | * We don't support inline sends for kernel QPs (yet), and we | |
1597 | * don't know what userspace's value should be. | |
1598 | */ | |
1599 | qp_attr->cap.max_inline_data = 0; | |
1600 | ||
1601 | qp_init_attr->cap = qp_attr->cap; | |
1602 | ||
6a775e2b JM |
1603 | return 0; |
1604 | } | |
1605 |