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f931551b | 1 | /* |
f7cf9a61 | 2 | * Copyright (c) 2012, 2013 Intel Corporation. All rights reserved. |
1fb9fed6 | 3 | * Copyright (c) 2006 - 2012 QLogic Corporation. * All rights reserved. |
f931551b RC |
4 | * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved. |
5 | * | |
6 | * This software is available to you under a choice of one of two | |
7 | * licenses. You may choose to be licensed under the terms of the GNU | |
8 | * General Public License (GPL) Version 2, available from the file | |
9 | * COPYING in the main directory of this source tree, or the | |
10 | * OpenIB.org BSD license below: | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or | |
13 | * without modification, are permitted provided that the following | |
14 | * conditions are met: | |
15 | * | |
16 | * - Redistributions of source code must retain the above | |
17 | * copyright notice, this list of conditions and the following | |
18 | * disclaimer. | |
19 | * | |
20 | * - Redistributions in binary form must reproduce the above | |
21 | * copyright notice, this list of conditions and the following | |
22 | * disclaimer in the documentation and/or other materials | |
23 | * provided with the distribution. | |
24 | * | |
25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
26 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
27 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
28 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
29 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
30 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
31 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
32 | * SOFTWARE. | |
33 | */ | |
34 | ||
35 | #include <linux/err.h> | |
36 | #include <linux/vmalloc.h> | |
af061a64 | 37 | #include <linux/jhash.h> |
869a2a96 | 38 | #include <rdma/rdma_vt.h> |
1dd173b0 MM |
39 | #ifdef CONFIG_DEBUG_FS |
40 | #include <linux/seq_file.h> | |
41 | #endif | |
f931551b RC |
42 | |
43 | #include "qib.h" | |
44 | ||
898fa52b HC |
45 | /* |
46 | * mask field which was present in now deleted qib_qpn_table | |
47 | * is not present in rvt_qpn_table. Defining the same field | |
48 | * as qpt_mask here instead of adding the mask field to | |
49 | * rvt_qpn_table. | |
50 | */ | |
51 | static u16 qpt_mask; | |
f931551b | 52 | |
898fa52b HC |
53 | static inline unsigned mk_qpn(struct rvt_qpn_table *qpt, |
54 | struct rvt_qpn_map *map, unsigned off) | |
f931551b | 55 | { |
898fa52b | 56 | return (map - qpt->map) * RVT_BITS_PER_PAGE + off; |
f931551b RC |
57 | } |
58 | ||
898fa52b HC |
59 | static inline unsigned find_next_offset(struct rvt_qpn_table *qpt, |
60 | struct rvt_qpn_map *map, unsigned off, | |
2528ea60 | 61 | unsigned n) |
f931551b | 62 | { |
898fa52b | 63 | if (qpt_mask) { |
f931551b | 64 | off++; |
898fa52b HC |
65 | if (((off & qpt_mask) >> 1) >= n) |
66 | off = (off | qpt_mask) + 2; | |
67 | } else { | |
68 | off = find_next_zero_bit(map->page, RVT_BITS_PER_PAGE, off); | |
69 | } | |
f931551b RC |
70 | return off; |
71 | } | |
72 | ||
73 | /* | |
74 | * Convert the AETH credit code into the number of credits. | |
75 | */ | |
76 | static u32 credit_table[31] = { | |
77 | 0, /* 0 */ | |
78 | 1, /* 1 */ | |
79 | 2, /* 2 */ | |
80 | 3, /* 3 */ | |
81 | 4, /* 4 */ | |
82 | 6, /* 5 */ | |
83 | 8, /* 6 */ | |
84 | 12, /* 7 */ | |
85 | 16, /* 8 */ | |
86 | 24, /* 9 */ | |
87 | 32, /* A */ | |
88 | 48, /* B */ | |
89 | 64, /* C */ | |
90 | 96, /* D */ | |
91 | 128, /* E */ | |
92 | 192, /* F */ | |
93 | 256, /* 10 */ | |
94 | 384, /* 11 */ | |
95 | 512, /* 12 */ | |
96 | 768, /* 13 */ | |
97 | 1024, /* 14 */ | |
98 | 1536, /* 15 */ | |
99 | 2048, /* 16 */ | |
100 | 3072, /* 17 */ | |
101 | 4096, /* 18 */ | |
102 | 6144, /* 19 */ | |
103 | 8192, /* 1A */ | |
104 | 12288, /* 1B */ | |
105 | 16384, /* 1C */ | |
106 | 24576, /* 1D */ | |
107 | 32768 /* 1E */ | |
108 | }; | |
109 | ||
898fa52b | 110 | static void get_map_page(struct rvt_qpn_table *qpt, struct rvt_qpn_map *map, |
fbbeb863 | 111 | gfp_t gfp) |
f931551b | 112 | { |
fbbeb863 | 113 | unsigned long page = get_zeroed_page(gfp); |
f931551b RC |
114 | |
115 | /* | |
116 | * Free the page if someone raced with us installing it. | |
117 | */ | |
118 | ||
119 | spin_lock(&qpt->lock); | |
120 | if (map->page) | |
121 | free_page(page); | |
122 | else | |
123 | map->page = (void *)page; | |
124 | spin_unlock(&qpt->lock); | |
125 | } | |
126 | ||
127 | /* | |
128 | * Allocate the next available QPN or | |
129 | * zero/one for QP type IB_QPT_SMI/IB_QPT_GSI. | |
130 | */ | |
898fa52b | 131 | static int alloc_qpn(struct qib_devdata *dd, struct rvt_qpn_table *qpt, |
fbbeb863 | 132 | enum ib_qp_type type, u8 port, gfp_t gfp) |
f931551b RC |
133 | { |
134 | u32 i, offset, max_scan, qpn; | |
898fa52b | 135 | struct rvt_qpn_map *map; |
f931551b | 136 | u32 ret; |
f931551b RC |
137 | |
138 | if (type == IB_QPT_SMI || type == IB_QPT_GSI) { | |
139 | unsigned n; | |
140 | ||
141 | ret = type == IB_QPT_GSI; | |
142 | n = 1 << (ret + 2 * (port - 1)); | |
143 | spin_lock(&qpt->lock); | |
144 | if (qpt->flags & n) | |
145 | ret = -EINVAL; | |
146 | else | |
147 | qpt->flags |= n; | |
148 | spin_unlock(&qpt->lock); | |
149 | goto bail; | |
150 | } | |
151 | ||
7c3edd3f | 152 | qpn = qpt->last + 2; |
898fa52b | 153 | if (qpn >= RVT_QPN_MAX) |
f931551b | 154 | qpn = 2; |
898fa52b HC |
155 | if (qpt_mask && ((qpn & qpt_mask) >> 1) >= dd->n_krcv_queues) |
156 | qpn = (qpn | qpt_mask) + 2; | |
157 | offset = qpn & RVT_BITS_PER_PAGE_MASK; | |
158 | map = &qpt->map[qpn / RVT_BITS_PER_PAGE]; | |
f931551b RC |
159 | max_scan = qpt->nmaps - !offset; |
160 | for (i = 0;;) { | |
161 | if (unlikely(!map->page)) { | |
fbbeb863 | 162 | get_map_page(qpt, map, gfp); |
f931551b RC |
163 | if (unlikely(!map->page)) |
164 | break; | |
165 | } | |
166 | do { | |
167 | if (!test_and_set_bit(offset, map->page)) { | |
168 | qpt->last = qpn; | |
169 | ret = qpn; | |
170 | goto bail; | |
171 | } | |
2528ea60 MM |
172 | offset = find_next_offset(qpt, map, offset, |
173 | dd->n_krcv_queues); | |
f931551b RC |
174 | qpn = mk_qpn(qpt, map, offset); |
175 | /* | |
176 | * This test differs from alloc_pidmap(). | |
177 | * If find_next_offset() does find a zero | |
178 | * bit, we don't need to check for QPN | |
179 | * wrapping around past our starting QPN. | |
180 | * We just need to be sure we don't loop | |
181 | * forever. | |
182 | */ | |
898fa52b | 183 | } while (offset < RVT_BITS_PER_PAGE && qpn < RVT_QPN_MAX); |
f931551b RC |
184 | /* |
185 | * In order to keep the number of pages allocated to a | |
186 | * minimum, we scan the all existing pages before increasing | |
187 | * the size of the bitmap table. | |
188 | */ | |
189 | if (++i > max_scan) { | |
898fa52b | 190 | if (qpt->nmaps == RVT_QPNMAP_ENTRIES) |
f931551b RC |
191 | break; |
192 | map = &qpt->map[qpt->nmaps++]; | |
2528ea60 | 193 | offset = 0; |
f931551b RC |
194 | } else if (map < &qpt->map[qpt->nmaps]) { |
195 | ++map; | |
2528ea60 | 196 | offset = 0; |
f931551b RC |
197 | } else { |
198 | map = &qpt->map[0]; | |
2528ea60 | 199 | offset = 2; |
f931551b RC |
200 | } |
201 | qpn = mk_qpn(qpt, map, offset); | |
202 | } | |
203 | ||
204 | ret = -ENOMEM; | |
205 | ||
206 | bail: | |
207 | return ret; | |
208 | } | |
209 | ||
898fa52b | 210 | static void free_qpn(struct rvt_qpn_table *qpt, u32 qpn) |
f931551b | 211 | { |
898fa52b | 212 | struct rvt_qpn_map *map; |
f931551b | 213 | |
898fa52b | 214 | map = qpt->map + qpn / RVT_BITS_PER_PAGE; |
f931551b | 215 | if (map->page) |
898fa52b | 216 | clear_bit(qpn & RVT_BITS_PER_PAGE_MASK, map->page); |
f931551b RC |
217 | } |
218 | ||
af061a64 MM |
219 | static inline unsigned qpn_hash(struct qib_ibdev *dev, u32 qpn) |
220 | { | |
221 | return jhash_1word(qpn, dev->qp_rnd) & | |
898fa52b | 222 | (dev->rdi.qp_dev->qp_table_size - 1); |
af061a64 MM |
223 | } |
224 | ||
225 | ||
f931551b RC |
226 | /* |
227 | * Put the QP into the hash table. | |
228 | * The hash table holds a reference to the QP. | |
229 | */ | |
7c2e11fe | 230 | static void insert_qp(struct qib_ibdev *dev, struct rvt_qp *qp) |
f931551b RC |
231 | { |
232 | struct qib_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); | |
f931551b | 233 | unsigned long flags; |
af061a64 | 234 | unsigned n = qpn_hash(dev, qp->ibqp.qp_num); |
f931551b | 235 | |
af061a64 | 236 | atomic_inc(&qp->refcount); |
898fa52b | 237 | spin_lock_irqsave(&dev->rdi.qp_dev->qpt_lock, flags); |
f931551b RC |
238 | |
239 | if (qp->ibqp.qp_num == 0) | |
f24a6d48 | 240 | rcu_assign_pointer(ibp->rvp.qp[0], qp); |
f931551b | 241 | else if (qp->ibqp.qp_num == 1) |
f24a6d48 | 242 | rcu_assign_pointer(ibp->rvp.qp[1], qp); |
f931551b | 243 | else { |
898fa52b HC |
244 | qp->next = dev->rdi.qp_dev->qp_table[n]; |
245 | rcu_assign_pointer(dev->rdi.qp_dev->qp_table[n], qp); | |
f931551b | 246 | } |
f931551b | 247 | |
898fa52b | 248 | spin_unlock_irqrestore(&dev->rdi.qp_dev->qpt_lock, flags); |
f931551b RC |
249 | } |
250 | ||
251 | /* | |
252 | * Remove the QP from the table so it can't be found asynchronously by | |
253 | * the receive interrupt routine. | |
254 | */ | |
7c2e11fe | 255 | static void remove_qp(struct qib_ibdev *dev, struct rvt_qp *qp) |
f931551b RC |
256 | { |
257 | struct qib_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); | |
af061a64 | 258 | unsigned n = qpn_hash(dev, qp->ibqp.qp_num); |
f931551b | 259 | unsigned long flags; |
f7cf9a61 | 260 | int removed = 1; |
898fa52b | 261 | spinlock_t *qpt_lock_ptr; /* Pointer to make checkpatch happy */ |
f931551b | 262 | |
898fa52b | 263 | spin_lock_irqsave(&dev->rdi.qp_dev->qpt_lock, flags); |
f931551b | 264 | |
898fa52b | 265 | qpt_lock_ptr = &dev->rdi.qp_dev->qpt_lock; |
f24a6d48 | 266 | if (rcu_dereference_protected(ibp->rvp.qp[0], |
898fa52b | 267 | lockdep_is_held(qpt_lock_ptr)) == qp) { |
f24a6d48 HC |
268 | RCU_INIT_POINTER(ibp->rvp.qp[0], NULL); |
269 | } else if (rcu_dereference_protected(ibp->rvp.qp[1], | |
898fa52b | 270 | lockdep_is_held(&dev->rdi.qp_dev->qpt_lock)) == qp) { |
f24a6d48 | 271 | RCU_INIT_POINTER(ibp->rvp.qp[1], NULL); |
af061a64 | 272 | } else { |
7c2e11fe DD |
273 | struct rvt_qp *q; |
274 | struct rvt_qp __rcu **qpp; | |
af061a64 | 275 | |
f7cf9a61 | 276 | removed = 0; |
898fa52b | 277 | qpp = &dev->rdi.qp_dev->qp_table[n]; |
d359f354 | 278 | for (; (q = rcu_dereference_protected(*qpp, |
898fa52b | 279 | lockdep_is_held(qpt_lock_ptr))) != NULL; |
d359f354 | 280 | qpp = &q->next) |
f931551b | 281 | if (q == qp) { |
03c88591 | 282 | RCU_INIT_POINTER(*qpp, |
bcc9b67a | 283 | rcu_dereference_protected(qp->next, |
898fa52b | 284 | lockdep_is_held(qpt_lock_ptr))); |
f7cf9a61 | 285 | removed = 1; |
f931551b RC |
286 | break; |
287 | } | |
af061a64 | 288 | } |
f931551b | 289 | |
898fa52b | 290 | spin_unlock_irqrestore(&dev->rdi.qp_dev->qpt_lock, flags); |
f7cf9a61 MM |
291 | if (removed) { |
292 | synchronize_rcu(); | |
293 | atomic_dec(&qp->refcount); | |
294 | } | |
f931551b RC |
295 | } |
296 | ||
297 | /** | |
298 | * qib_free_all_qps - check for QPs still in use | |
299 | * @qpt: the QP table to empty | |
300 | * | |
301 | * There should not be any QPs still in use. | |
302 | * Free memory for table. | |
303 | */ | |
304 | unsigned qib_free_all_qps(struct qib_devdata *dd) | |
305 | { | |
306 | struct qib_ibdev *dev = &dd->verbs_dev; | |
307 | unsigned long flags; | |
7c2e11fe | 308 | struct rvt_qp *qp; |
f931551b | 309 | unsigned n, qp_inuse = 0; |
898fa52b | 310 | spinlock_t *qpt_lock_ptr; /* Pointer to make checkpatch happy */ |
f931551b RC |
311 | |
312 | for (n = 0; n < dd->num_pports; n++) { | |
313 | struct qib_ibport *ibp = &dd->pport[n].ibport_data; | |
314 | ||
315 | if (!qib_mcast_tree_empty(ibp)) | |
316 | qp_inuse++; | |
af061a64 | 317 | rcu_read_lock(); |
f24a6d48 | 318 | if (rcu_dereference(ibp->rvp.qp[0])) |
f931551b | 319 | qp_inuse++; |
f24a6d48 | 320 | if (rcu_dereference(ibp->rvp.qp[1])) |
f931551b | 321 | qp_inuse++; |
af061a64 | 322 | rcu_read_unlock(); |
f931551b RC |
323 | } |
324 | ||
898fa52b HC |
325 | spin_lock_irqsave(&dev->rdi.qp_dev->qpt_lock, flags); |
326 | qpt_lock_ptr = &dev->rdi.qp_dev->qpt_lock; | |
327 | for (n = 0; n < dev->rdi.qp_dev->qp_table_size; n++) { | |
328 | qp = rcu_dereference_protected(dev->rdi.qp_dev->qp_table[n], | |
329 | lockdep_is_held(qpt_lock_ptr)); | |
330 | RCU_INIT_POINTER(dev->rdi.qp_dev->qp_table[n], NULL); | |
f931551b | 331 | |
1fb9fed6 | 332 | for (; qp; qp = rcu_dereference_protected(qp->next, |
898fa52b | 333 | lockdep_is_held(qpt_lock_ptr))) |
f931551b RC |
334 | qp_inuse++; |
335 | } | |
898fa52b | 336 | spin_unlock_irqrestore(&dev->rdi.qp_dev->qpt_lock, flags); |
af061a64 | 337 | synchronize_rcu(); |
f931551b RC |
338 | |
339 | return qp_inuse; | |
340 | } | |
341 | ||
342 | /** | |
343 | * qib_lookup_qpn - return the QP with the given QPN | |
344 | * @qpt: the QP table | |
345 | * @qpn: the QP number to look up | |
346 | * | |
347 | * The caller is responsible for decrementing the QP reference count | |
348 | * when done. | |
349 | */ | |
7c2e11fe | 350 | struct rvt_qp *qib_lookup_qpn(struct qib_ibport *ibp, u32 qpn) |
f931551b | 351 | { |
7c2e11fe | 352 | struct rvt_qp *qp = NULL; |
f931551b | 353 | |
f7cf9a61 | 354 | rcu_read_lock(); |
af061a64 | 355 | if (unlikely(qpn <= 1)) { |
af061a64 | 356 | if (qpn == 0) |
f24a6d48 | 357 | qp = rcu_dereference(ibp->rvp.qp[0]); |
af061a64 | 358 | else |
f24a6d48 | 359 | qp = rcu_dereference(ibp->rvp.qp[1]); |
f7cf9a61 MM |
360 | if (qp) |
361 | atomic_inc(&qp->refcount); | |
af061a64 MM |
362 | } else { |
363 | struct qib_ibdev *dev = &ppd_from_ibp(ibp)->dd->verbs_dev; | |
364 | unsigned n = qpn_hash(dev, qpn); | |
f931551b | 365 | |
898fa52b | 366 | for (qp = rcu_dereference(dev->rdi.qp_dev->qp_table[n]); qp; |
1fb9fed6 | 367 | qp = rcu_dereference(qp->next)) |
f7cf9a61 MM |
368 | if (qp->ibqp.qp_num == qpn) { |
369 | atomic_inc(&qp->refcount); | |
f931551b | 370 | break; |
f7cf9a61 | 371 | } |
af061a64 | 372 | } |
af061a64 | 373 | rcu_read_unlock(); |
f931551b RC |
374 | return qp; |
375 | } | |
376 | ||
377 | /** | |
378 | * qib_reset_qp - initialize the QP state to the reset state | |
379 | * @qp: the QP to reset | |
380 | * @type: the QP type | |
381 | */ | |
7c2e11fe | 382 | static void qib_reset_qp(struct rvt_qp *qp, enum ib_qp_type type) |
f931551b | 383 | { |
ffc26907 | 384 | struct qib_qp_priv *priv = qp->priv; |
f931551b RC |
385 | qp->remote_qpn = 0; |
386 | qp->qkey = 0; | |
387 | qp->qp_access_flags = 0; | |
ffc26907 | 388 | atomic_set(&priv->s_dma_busy, 0); |
01ba79d4 | 389 | qp->s_flags &= RVT_S_SIGNAL_REQ_WR; |
f931551b RC |
390 | qp->s_hdrwords = 0; |
391 | qp->s_wqe = NULL; | |
392 | qp->s_draining = 0; | |
393 | qp->s_next_psn = 0; | |
394 | qp->s_last_psn = 0; | |
395 | qp->s_sending_psn = 0; | |
396 | qp->s_sending_hpsn = 0; | |
397 | qp->s_psn = 0; | |
398 | qp->r_psn = 0; | |
399 | qp->r_msn = 0; | |
400 | if (type == IB_QPT_RC) { | |
401 | qp->s_state = IB_OPCODE_RC_SEND_LAST; | |
402 | qp->r_state = IB_OPCODE_RC_SEND_LAST; | |
403 | } else { | |
404 | qp->s_state = IB_OPCODE_UC_SEND_LAST; | |
405 | qp->r_state = IB_OPCODE_UC_SEND_LAST; | |
406 | } | |
407 | qp->s_ack_state = IB_OPCODE_RC_ACKNOWLEDGE; | |
408 | qp->r_nak_state = 0; | |
409 | qp->r_aflags = 0; | |
410 | qp->r_flags = 0; | |
411 | qp->s_head = 0; | |
412 | qp->s_tail = 0; | |
413 | qp->s_cur = 0; | |
414 | qp->s_acked = 0; | |
415 | qp->s_last = 0; | |
416 | qp->s_ssn = 1; | |
417 | qp->s_lsn = 0; | |
418 | qp->s_mig_state = IB_MIG_MIGRATED; | |
419 | memset(qp->s_ack_queue, 0, sizeof(qp->s_ack_queue)); | |
420 | qp->r_head_ack_queue = 0; | |
421 | qp->s_tail_ack_queue = 0; | |
422 | qp->s_num_rd_atomic = 0; | |
423 | if (qp->r_rq.wq) { | |
424 | qp->r_rq.wq->head = 0; | |
425 | qp->r_rq.wq->tail = 0; | |
426 | } | |
427 | qp->r_sge.num_sge = 0; | |
428 | } | |
429 | ||
7c2e11fe | 430 | static void clear_mr_refs(struct rvt_qp *qp, int clr_sends) |
f931551b RC |
431 | { |
432 | unsigned n; | |
433 | ||
01ba79d4 | 434 | if (test_and_clear_bit(RVT_R_REWIND_SGE, &qp->r_aflags)) |
6a82649f | 435 | qib_put_ss(&qp->s_rdma_read_sge); |
f931551b | 436 | |
6a82649f | 437 | qib_put_ss(&qp->r_sge); |
f931551b RC |
438 | |
439 | if (clr_sends) { | |
440 | while (qp->s_last != qp->s_head) { | |
7c2e11fe | 441 | struct rvt_swqe *wqe = get_swqe_ptr(qp, qp->s_last); |
f931551b RC |
442 | unsigned i; |
443 | ||
444 | for (i = 0; i < wqe->wr.num_sge; i++) { | |
7c2e11fe | 445 | struct rvt_sge *sge = &wqe->sg_list[i]; |
f931551b | 446 | |
7c2e11fe | 447 | rvt_put_mr(sge->mr); |
f931551b RC |
448 | } |
449 | if (qp->ibqp.qp_type == IB_QPT_UD || | |
450 | qp->ibqp.qp_type == IB_QPT_SMI || | |
451 | qp->ibqp.qp_type == IB_QPT_GSI) | |
96ab1ac1 DD |
452 | atomic_dec( |
453 | &ibah_to_rvtah(wqe->ud_wr.ah)->refcount); | |
f931551b RC |
454 | if (++qp->s_last >= qp->s_size) |
455 | qp->s_last = 0; | |
456 | } | |
457 | if (qp->s_rdma_mr) { | |
7c2e11fe | 458 | rvt_put_mr(qp->s_rdma_mr); |
f931551b RC |
459 | qp->s_rdma_mr = NULL; |
460 | } | |
461 | } | |
462 | ||
463 | if (qp->ibqp.qp_type != IB_QPT_RC) | |
464 | return; | |
465 | ||
466 | for (n = 0; n < ARRAY_SIZE(qp->s_ack_queue); n++) { | |
7c2e11fe | 467 | struct rvt_ack_entry *e = &qp->s_ack_queue[n]; |
f931551b RC |
468 | |
469 | if (e->opcode == IB_OPCODE_RC_RDMA_READ_REQUEST && | |
470 | e->rdma_sge.mr) { | |
7c2e11fe | 471 | rvt_put_mr(e->rdma_sge.mr); |
f931551b RC |
472 | e->rdma_sge.mr = NULL; |
473 | } | |
474 | } | |
475 | } | |
476 | ||
477 | /** | |
478 | * qib_error_qp - put a QP into the error state | |
479 | * @qp: the QP to put into the error state | |
480 | * @err: the receive completion error to signal if a RWQE is active | |
481 | * | |
482 | * Flushes both send and receive work queues. | |
483 | * Returns true if last WQE event should be generated. | |
a5210c12 | 484 | * The QP r_lock and s_lock should be held and interrupts disabled. |
f931551b RC |
485 | * If we are already in error state, just return. |
486 | */ | |
7c2e11fe | 487 | int qib_error_qp(struct rvt_qp *qp, enum ib_wc_status err) |
f931551b | 488 | { |
ffc26907 | 489 | struct qib_qp_priv *priv = qp->priv; |
f931551b RC |
490 | struct qib_ibdev *dev = to_idev(qp->ibqp.device); |
491 | struct ib_wc wc; | |
492 | int ret = 0; | |
493 | ||
494 | if (qp->state == IB_QPS_ERR || qp->state == IB_QPS_RESET) | |
495 | goto bail; | |
496 | ||
497 | qp->state = IB_QPS_ERR; | |
498 | ||
01ba79d4 HC |
499 | if (qp->s_flags & (RVT_S_TIMER | RVT_S_WAIT_RNR)) { |
500 | qp->s_flags &= ~(RVT_S_TIMER | RVT_S_WAIT_RNR); | |
f931551b RC |
501 | del_timer(&qp->s_timer); |
502 | } | |
16028f27 | 503 | |
01ba79d4 HC |
504 | if (qp->s_flags & RVT_S_ANY_WAIT_SEND) |
505 | qp->s_flags &= ~RVT_S_ANY_WAIT_SEND; | |
16028f27 | 506 | |
cd18201f | 507 | spin_lock(&dev->rdi.pending_lock); |
01ba79d4 HC |
508 | if (!list_empty(&priv->iowait) && !(qp->s_flags & RVT_S_BUSY)) { |
509 | qp->s_flags &= ~RVT_S_ANY_WAIT_IO; | |
ffc26907 | 510 | list_del_init(&priv->iowait); |
f931551b | 511 | } |
cd18201f | 512 | spin_unlock(&dev->rdi.pending_lock); |
f931551b | 513 | |
01ba79d4 | 514 | if (!(qp->s_flags & RVT_S_BUSY)) { |
f931551b RC |
515 | qp->s_hdrwords = 0; |
516 | if (qp->s_rdma_mr) { | |
7c2e11fe | 517 | rvt_put_mr(qp->s_rdma_mr); |
f931551b RC |
518 | qp->s_rdma_mr = NULL; |
519 | } | |
ffc26907 DD |
520 | if (priv->s_tx) { |
521 | qib_put_txreq(priv->s_tx); | |
522 | priv->s_tx = NULL; | |
f931551b RC |
523 | } |
524 | } | |
525 | ||
526 | /* Schedule the sending tasklet to drain the send work queue. */ | |
527 | if (qp->s_last != qp->s_head) | |
528 | qib_schedule_send(qp); | |
529 | ||
530 | clear_mr_refs(qp, 0); | |
531 | ||
532 | memset(&wc, 0, sizeof(wc)); | |
533 | wc.qp = &qp->ibqp; | |
534 | wc.opcode = IB_WC_RECV; | |
535 | ||
01ba79d4 | 536 | if (test_and_clear_bit(RVT_R_WRID_VALID, &qp->r_aflags)) { |
f931551b RC |
537 | wc.wr_id = qp->r_wr_id; |
538 | wc.status = err; | |
539 | qib_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 1); | |
540 | } | |
541 | wc.status = IB_WC_WR_FLUSH_ERR; | |
542 | ||
543 | if (qp->r_rq.wq) { | |
7c2e11fe | 544 | struct rvt_rwq *wq; |
f931551b RC |
545 | u32 head; |
546 | u32 tail; | |
547 | ||
548 | spin_lock(&qp->r_rq.lock); | |
549 | ||
550 | /* sanity check pointers before trusting them */ | |
551 | wq = qp->r_rq.wq; | |
552 | head = wq->head; | |
553 | if (head >= qp->r_rq.size) | |
554 | head = 0; | |
555 | tail = wq->tail; | |
556 | if (tail >= qp->r_rq.size) | |
557 | tail = 0; | |
558 | while (tail != head) { | |
559 | wc.wr_id = get_rwqe_ptr(&qp->r_rq, tail)->wr_id; | |
560 | if (++tail >= qp->r_rq.size) | |
561 | tail = 0; | |
562 | qib_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 1); | |
563 | } | |
564 | wq->tail = tail; | |
565 | ||
566 | spin_unlock(&qp->r_rq.lock); | |
567 | } else if (qp->ibqp.event_handler) | |
568 | ret = 1; | |
569 | ||
570 | bail: | |
571 | return ret; | |
572 | } | |
573 | ||
574 | /** | |
575 | * qib_modify_qp - modify the attributes of a queue pair | |
576 | * @ibqp: the queue pair who's attributes we're modifying | |
577 | * @attr: the new attributes | |
578 | * @attr_mask: the mask of attributes to modify | |
579 | * @udata: user data for libibverbs.so | |
580 | * | |
581 | * Returns 0 on success, otherwise returns an errno. | |
582 | */ | |
583 | int qib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, | |
584 | int attr_mask, struct ib_udata *udata) | |
585 | { | |
586 | struct qib_ibdev *dev = to_idev(ibqp->device); | |
7c2e11fe | 587 | struct rvt_qp *qp = to_iqp(ibqp); |
ffc26907 | 588 | struct qib_qp_priv *priv = qp->priv; |
f931551b RC |
589 | enum ib_qp_state cur_state, new_state; |
590 | struct ib_event ev; | |
591 | int lastwqe = 0; | |
592 | int mig = 0; | |
593 | int ret; | |
594 | u32 pmtu = 0; /* for gcc warning only */ | |
595 | ||
596 | spin_lock_irq(&qp->r_lock); | |
597 | spin_lock(&qp->s_lock); | |
598 | ||
599 | cur_state = attr_mask & IB_QP_CUR_STATE ? | |
600 | attr->cur_qp_state : qp->state; | |
601 | new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state; | |
602 | ||
603 | if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, | |
dd5f03be | 604 | attr_mask, IB_LINK_LAYER_UNSPECIFIED)) |
f931551b RC |
605 | goto inval; |
606 | ||
607 | if (attr_mask & IB_QP_AV) { | |
9ff198f5 | 608 | if (attr->ah_attr.dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) |
f931551b | 609 | goto inval; |
96ab1ac1 | 610 | if (rvt_check_ah(qp->ibqp.device, &attr->ah_attr)) |
f931551b RC |
611 | goto inval; |
612 | } | |
613 | ||
614 | if (attr_mask & IB_QP_ALT_PATH) { | |
9ff198f5 DD |
615 | if (attr->alt_ah_attr.dlid >= |
616 | be16_to_cpu(IB_MULTICAST_LID_BASE)) | |
f931551b | 617 | goto inval; |
96ab1ac1 | 618 | if (rvt_check_ah(qp->ibqp.device, &attr->alt_ah_attr)) |
f931551b RC |
619 | goto inval; |
620 | if (attr->alt_pkey_index >= qib_get_npkeys(dd_from_dev(dev))) | |
621 | goto inval; | |
622 | } | |
623 | ||
624 | if (attr_mask & IB_QP_PKEY_INDEX) | |
625 | if (attr->pkey_index >= qib_get_npkeys(dd_from_dev(dev))) | |
626 | goto inval; | |
627 | ||
628 | if (attr_mask & IB_QP_MIN_RNR_TIMER) | |
629 | if (attr->min_rnr_timer > 31) | |
630 | goto inval; | |
631 | ||
632 | if (attr_mask & IB_QP_PORT) | |
633 | if (qp->ibqp.qp_type == IB_QPT_SMI || | |
634 | qp->ibqp.qp_type == IB_QPT_GSI || | |
635 | attr->port_num == 0 || | |
636 | attr->port_num > ibqp->device->phys_port_cnt) | |
637 | goto inval; | |
638 | ||
639 | if (attr_mask & IB_QP_DEST_QPN) | |
640 | if (attr->dest_qp_num > QIB_QPN_MASK) | |
641 | goto inval; | |
642 | ||
643 | if (attr_mask & IB_QP_RETRY_CNT) | |
644 | if (attr->retry_cnt > 7) | |
645 | goto inval; | |
646 | ||
647 | if (attr_mask & IB_QP_RNR_RETRY) | |
648 | if (attr->rnr_retry > 7) | |
649 | goto inval; | |
650 | ||
651 | /* | |
652 | * Don't allow invalid path_mtu values. OK to set greater | |
653 | * than the active mtu (or even the max_cap, if we have tuned | |
654 | * that to a small mtu. We'll set qp->path_mtu | |
655 | * to the lesser of requested attribute mtu and active, | |
656 | * for packetizing messages. | |
657 | * Note that the QP port has to be set in INIT and MTU in RTR. | |
658 | */ | |
659 | if (attr_mask & IB_QP_PATH_MTU) { | |
660 | struct qib_devdata *dd = dd_from_dev(dev); | |
661 | int mtu, pidx = qp->port_num - 1; | |
662 | ||
663 | mtu = ib_mtu_enum_to_int(attr->path_mtu); | |
664 | if (mtu == -1) | |
665 | goto inval; | |
666 | if (mtu > dd->pport[pidx].ibmtu) { | |
667 | switch (dd->pport[pidx].ibmtu) { | |
668 | case 4096: | |
669 | pmtu = IB_MTU_4096; | |
670 | break; | |
671 | case 2048: | |
672 | pmtu = IB_MTU_2048; | |
673 | break; | |
674 | case 1024: | |
675 | pmtu = IB_MTU_1024; | |
676 | break; | |
677 | case 512: | |
678 | pmtu = IB_MTU_512; | |
679 | break; | |
680 | case 256: | |
681 | pmtu = IB_MTU_256; | |
682 | break; | |
683 | default: | |
684 | pmtu = IB_MTU_2048; | |
685 | } | |
686 | } else | |
687 | pmtu = attr->path_mtu; | |
688 | } | |
689 | ||
690 | if (attr_mask & IB_QP_PATH_MIG_STATE) { | |
691 | if (attr->path_mig_state == IB_MIG_REARM) { | |
692 | if (qp->s_mig_state == IB_MIG_ARMED) | |
693 | goto inval; | |
694 | if (new_state != IB_QPS_RTS) | |
695 | goto inval; | |
696 | } else if (attr->path_mig_state == IB_MIG_MIGRATED) { | |
697 | if (qp->s_mig_state == IB_MIG_REARM) | |
698 | goto inval; | |
699 | if (new_state != IB_QPS_RTS && new_state != IB_QPS_SQD) | |
700 | goto inval; | |
701 | if (qp->s_mig_state == IB_MIG_ARMED) | |
702 | mig = 1; | |
703 | } else | |
704 | goto inval; | |
705 | } | |
706 | ||
707 | if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) | |
708 | if (attr->max_dest_rd_atomic > QIB_MAX_RDMA_ATOMIC) | |
709 | goto inval; | |
710 | ||
711 | switch (new_state) { | |
712 | case IB_QPS_RESET: | |
713 | if (qp->state != IB_QPS_RESET) { | |
714 | qp->state = IB_QPS_RESET; | |
cd18201f | 715 | spin_lock(&dev->rdi.pending_lock); |
ffc26907 DD |
716 | if (!list_empty(&priv->iowait)) |
717 | list_del_init(&priv->iowait); | |
cd18201f | 718 | spin_unlock(&dev->rdi.pending_lock); |
01ba79d4 | 719 | qp->s_flags &= ~(RVT_S_TIMER | RVT_S_ANY_WAIT); |
f931551b RC |
720 | spin_unlock(&qp->s_lock); |
721 | spin_unlock_irq(&qp->r_lock); | |
722 | /* Stop the sending work queue and retry timer */ | |
ffc26907 | 723 | cancel_work_sync(&priv->s_work); |
f931551b | 724 | del_timer_sync(&qp->s_timer); |
ffc26907 DD |
725 | wait_event(priv->wait_dma, |
726 | !atomic_read(&priv->s_dma_busy)); | |
727 | if (priv->s_tx) { | |
728 | qib_put_txreq(priv->s_tx); | |
729 | priv->s_tx = NULL; | |
f931551b RC |
730 | } |
731 | remove_qp(dev, qp); | |
732 | wait_event(qp->wait, !atomic_read(&qp->refcount)); | |
733 | spin_lock_irq(&qp->r_lock); | |
734 | spin_lock(&qp->s_lock); | |
735 | clear_mr_refs(qp, 1); | |
736 | qib_reset_qp(qp, ibqp->qp_type); | |
737 | } | |
738 | break; | |
739 | ||
740 | case IB_QPS_RTR: | |
741 | /* Allow event to retrigger if QP set to RTR more than once */ | |
01ba79d4 | 742 | qp->r_flags &= ~RVT_R_COMM_EST; |
f931551b RC |
743 | qp->state = new_state; |
744 | break; | |
745 | ||
746 | case IB_QPS_SQD: | |
747 | qp->s_draining = qp->s_last != qp->s_cur; | |
748 | qp->state = new_state; | |
749 | break; | |
750 | ||
751 | case IB_QPS_SQE: | |
752 | if (qp->ibqp.qp_type == IB_QPT_RC) | |
753 | goto inval; | |
754 | qp->state = new_state; | |
755 | break; | |
756 | ||
757 | case IB_QPS_ERR: | |
758 | lastwqe = qib_error_qp(qp, IB_WC_WR_FLUSH_ERR); | |
759 | break; | |
760 | ||
761 | default: | |
762 | qp->state = new_state; | |
763 | break; | |
764 | } | |
765 | ||
766 | if (attr_mask & IB_QP_PKEY_INDEX) | |
767 | qp->s_pkey_index = attr->pkey_index; | |
768 | ||
769 | if (attr_mask & IB_QP_PORT) | |
770 | qp->port_num = attr->port_num; | |
771 | ||
772 | if (attr_mask & IB_QP_DEST_QPN) | |
773 | qp->remote_qpn = attr->dest_qp_num; | |
774 | ||
775 | if (attr_mask & IB_QP_SQ_PSN) { | |
776 | qp->s_next_psn = attr->sq_psn & QIB_PSN_MASK; | |
777 | qp->s_psn = qp->s_next_psn; | |
778 | qp->s_sending_psn = qp->s_next_psn; | |
779 | qp->s_last_psn = qp->s_next_psn - 1; | |
780 | qp->s_sending_hpsn = qp->s_last_psn; | |
781 | } | |
782 | ||
783 | if (attr_mask & IB_QP_RQ_PSN) | |
784 | qp->r_psn = attr->rq_psn & QIB_PSN_MASK; | |
785 | ||
786 | if (attr_mask & IB_QP_ACCESS_FLAGS) | |
787 | qp->qp_access_flags = attr->qp_access_flags; | |
788 | ||
789 | if (attr_mask & IB_QP_AV) { | |
790 | qp->remote_ah_attr = attr->ah_attr; | |
791 | qp->s_srate = attr->ah_attr.static_rate; | |
792 | } | |
793 | ||
794 | if (attr_mask & IB_QP_ALT_PATH) { | |
795 | qp->alt_ah_attr = attr->alt_ah_attr; | |
796 | qp->s_alt_pkey_index = attr->alt_pkey_index; | |
797 | } | |
798 | ||
799 | if (attr_mask & IB_QP_PATH_MIG_STATE) { | |
800 | qp->s_mig_state = attr->path_mig_state; | |
801 | if (mig) { | |
802 | qp->remote_ah_attr = qp->alt_ah_attr; | |
803 | qp->port_num = qp->alt_ah_attr.port_num; | |
804 | qp->s_pkey_index = qp->s_alt_pkey_index; | |
805 | } | |
806 | } | |
807 | ||
cc6ea138 | 808 | if (attr_mask & IB_QP_PATH_MTU) { |
f931551b | 809 | qp->path_mtu = pmtu; |
cc6ea138 MM |
810 | qp->pmtu = ib_mtu_enum_to_int(pmtu); |
811 | } | |
f931551b RC |
812 | |
813 | if (attr_mask & IB_QP_RETRY_CNT) { | |
814 | qp->s_retry_cnt = attr->retry_cnt; | |
815 | qp->s_retry = attr->retry_cnt; | |
816 | } | |
817 | ||
818 | if (attr_mask & IB_QP_RNR_RETRY) { | |
819 | qp->s_rnr_retry_cnt = attr->rnr_retry; | |
820 | qp->s_rnr_retry = attr->rnr_retry; | |
821 | } | |
822 | ||
823 | if (attr_mask & IB_QP_MIN_RNR_TIMER) | |
824 | qp->r_min_rnr_timer = attr->min_rnr_timer; | |
825 | ||
d0f2faf7 | 826 | if (attr_mask & IB_QP_TIMEOUT) { |
f931551b | 827 | qp->timeout = attr->timeout; |
d0f2faf7 MM |
828 | qp->timeout_jiffies = |
829 | usecs_to_jiffies((4096UL * (1UL << qp->timeout)) / | |
830 | 1000UL); | |
831 | } | |
f931551b RC |
832 | |
833 | if (attr_mask & IB_QP_QKEY) | |
834 | qp->qkey = attr->qkey; | |
835 | ||
836 | if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) | |
837 | qp->r_max_rd_atomic = attr->max_dest_rd_atomic; | |
838 | ||
839 | if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) | |
840 | qp->s_max_rd_atomic = attr->max_rd_atomic; | |
841 | ||
842 | spin_unlock(&qp->s_lock); | |
843 | spin_unlock_irq(&qp->r_lock); | |
844 | ||
845 | if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) | |
846 | insert_qp(dev, qp); | |
847 | ||
848 | if (lastwqe) { | |
849 | ev.device = qp->ibqp.device; | |
850 | ev.element.qp = &qp->ibqp; | |
851 | ev.event = IB_EVENT_QP_LAST_WQE_REACHED; | |
852 | qp->ibqp.event_handler(&ev, qp->ibqp.qp_context); | |
853 | } | |
854 | if (mig) { | |
855 | ev.device = qp->ibqp.device; | |
856 | ev.element.qp = &qp->ibqp; | |
857 | ev.event = IB_EVENT_PATH_MIG; | |
858 | qp->ibqp.event_handler(&ev, qp->ibqp.qp_context); | |
859 | } | |
860 | ret = 0; | |
861 | goto bail; | |
862 | ||
863 | inval: | |
864 | spin_unlock(&qp->s_lock); | |
865 | spin_unlock_irq(&qp->r_lock); | |
866 | ret = -EINVAL; | |
867 | ||
868 | bail: | |
869 | return ret; | |
870 | } | |
871 | ||
872 | int qib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, | |
873 | int attr_mask, struct ib_qp_init_attr *init_attr) | |
874 | { | |
7c2e11fe | 875 | struct rvt_qp *qp = to_iqp(ibqp); |
f931551b RC |
876 | |
877 | attr->qp_state = qp->state; | |
878 | attr->cur_qp_state = attr->qp_state; | |
879 | attr->path_mtu = qp->path_mtu; | |
880 | attr->path_mig_state = qp->s_mig_state; | |
881 | attr->qkey = qp->qkey; | |
882 | attr->rq_psn = qp->r_psn & QIB_PSN_MASK; | |
883 | attr->sq_psn = qp->s_next_psn & QIB_PSN_MASK; | |
884 | attr->dest_qp_num = qp->remote_qpn; | |
885 | attr->qp_access_flags = qp->qp_access_flags; | |
886 | attr->cap.max_send_wr = qp->s_size - 1; | |
887 | attr->cap.max_recv_wr = qp->ibqp.srq ? 0 : qp->r_rq.size - 1; | |
888 | attr->cap.max_send_sge = qp->s_max_sge; | |
889 | attr->cap.max_recv_sge = qp->r_rq.max_sge; | |
890 | attr->cap.max_inline_data = 0; | |
891 | attr->ah_attr = qp->remote_ah_attr; | |
892 | attr->alt_ah_attr = qp->alt_ah_attr; | |
893 | attr->pkey_index = qp->s_pkey_index; | |
894 | attr->alt_pkey_index = qp->s_alt_pkey_index; | |
895 | attr->en_sqd_async_notify = 0; | |
896 | attr->sq_draining = qp->s_draining; | |
897 | attr->max_rd_atomic = qp->s_max_rd_atomic; | |
898 | attr->max_dest_rd_atomic = qp->r_max_rd_atomic; | |
899 | attr->min_rnr_timer = qp->r_min_rnr_timer; | |
900 | attr->port_num = qp->port_num; | |
901 | attr->timeout = qp->timeout; | |
902 | attr->retry_cnt = qp->s_retry_cnt; | |
903 | attr->rnr_retry = qp->s_rnr_retry_cnt; | |
904 | attr->alt_port_num = qp->alt_ah_attr.port_num; | |
905 | attr->alt_timeout = qp->alt_timeout; | |
906 | ||
907 | init_attr->event_handler = qp->ibqp.event_handler; | |
908 | init_attr->qp_context = qp->ibqp.qp_context; | |
909 | init_attr->send_cq = qp->ibqp.send_cq; | |
910 | init_attr->recv_cq = qp->ibqp.recv_cq; | |
911 | init_attr->srq = qp->ibqp.srq; | |
912 | init_attr->cap = attr->cap; | |
01ba79d4 | 913 | if (qp->s_flags & RVT_S_SIGNAL_REQ_WR) |
f931551b RC |
914 | init_attr->sq_sig_type = IB_SIGNAL_REQ_WR; |
915 | else | |
916 | init_attr->sq_sig_type = IB_SIGNAL_ALL_WR; | |
917 | init_attr->qp_type = qp->ibqp.qp_type; | |
918 | init_attr->port_num = qp->port_num; | |
919 | return 0; | |
920 | } | |
921 | ||
922 | /** | |
923 | * qib_compute_aeth - compute the AETH (syndrome + MSN) | |
924 | * @qp: the queue pair to compute the AETH for | |
925 | * | |
926 | * Returns the AETH. | |
927 | */ | |
7c2e11fe | 928 | __be32 qib_compute_aeth(struct rvt_qp *qp) |
f931551b RC |
929 | { |
930 | u32 aeth = qp->r_msn & QIB_MSN_MASK; | |
931 | ||
932 | if (qp->ibqp.srq) { | |
933 | /* | |
934 | * Shared receive queues don't generate credits. | |
935 | * Set the credit field to the invalid value. | |
936 | */ | |
937 | aeth |= QIB_AETH_CREDIT_INVAL << QIB_AETH_CREDIT_SHIFT; | |
938 | } else { | |
939 | u32 min, max, x; | |
940 | u32 credits; | |
7c2e11fe | 941 | struct rvt_rwq *wq = qp->r_rq.wq; |
f931551b RC |
942 | u32 head; |
943 | u32 tail; | |
944 | ||
945 | /* sanity check pointers before trusting them */ | |
946 | head = wq->head; | |
947 | if (head >= qp->r_rq.size) | |
948 | head = 0; | |
949 | tail = wq->tail; | |
950 | if (tail >= qp->r_rq.size) | |
951 | tail = 0; | |
952 | /* | |
953 | * Compute the number of credits available (RWQEs). | |
954 | * XXX Not holding the r_rq.lock here so there is a small | |
955 | * chance that the pair of reads are not atomic. | |
956 | */ | |
957 | credits = head - tail; | |
958 | if ((int)credits < 0) | |
959 | credits += qp->r_rq.size; | |
960 | /* | |
961 | * Binary search the credit table to find the code to | |
962 | * use. | |
963 | */ | |
964 | min = 0; | |
965 | max = 31; | |
966 | for (;;) { | |
967 | x = (min + max) / 2; | |
968 | if (credit_table[x] == credits) | |
969 | break; | |
970 | if (credit_table[x] > credits) | |
971 | max = x; | |
972 | else if (min == x) | |
973 | break; | |
974 | else | |
975 | min = x; | |
976 | } | |
977 | aeth |= x << QIB_AETH_CREDIT_SHIFT; | |
978 | } | |
979 | return cpu_to_be32(aeth); | |
980 | } | |
981 | ||
982 | /** | |
983 | * qib_create_qp - create a queue pair for a device | |
984 | * @ibpd: the protection domain who's device we create the queue pair for | |
985 | * @init_attr: the attributes of the queue pair | |
986 | * @udata: user data for libibverbs.so | |
987 | * | |
988 | * Returns the queue pair on success, otherwise returns an errno. | |
989 | * | |
990 | * Called by the ib_create_qp() core verbs function. | |
991 | */ | |
992 | struct ib_qp *qib_create_qp(struct ib_pd *ibpd, | |
993 | struct ib_qp_init_attr *init_attr, | |
994 | struct ib_udata *udata) | |
995 | { | |
7c2e11fe | 996 | struct rvt_qp *qp; |
f931551b | 997 | int err; |
7c2e11fe | 998 | struct rvt_swqe *swq = NULL; |
f931551b RC |
999 | struct qib_ibdev *dev; |
1000 | struct qib_devdata *dd; | |
1001 | size_t sz; | |
1002 | size_t sg_list_sz; | |
1003 | struct ib_qp *ret; | |
fbbeb863 | 1004 | gfp_t gfp; |
ffc26907 | 1005 | struct qib_qp_priv *priv; |
f931551b RC |
1006 | |
1007 | if (init_attr->cap.max_send_sge > ib_qib_max_sges || | |
60093dc0 | 1008 | init_attr->cap.max_send_wr > ib_qib_max_qp_wrs || |
fbbeb863 VA |
1009 | init_attr->create_flags & ~(IB_QP_CREATE_USE_GFP_NOIO)) |
1010 | return ERR_PTR(-EINVAL); | |
1011 | ||
1012 | /* GFP_NOIO is applicable in RC QPs only */ | |
1013 | if (init_attr->create_flags & IB_QP_CREATE_USE_GFP_NOIO && | |
1014 | init_attr->qp_type != IB_QPT_RC) | |
1015 | return ERR_PTR(-EINVAL); | |
1016 | ||
1017 | gfp = init_attr->create_flags & IB_QP_CREATE_USE_GFP_NOIO ? | |
1018 | GFP_NOIO : GFP_KERNEL; | |
f931551b RC |
1019 | |
1020 | /* Check receive queue parameters if no SRQ is specified. */ | |
1021 | if (!init_attr->srq) { | |
1022 | if (init_attr->cap.max_recv_sge > ib_qib_max_sges || | |
1023 | init_attr->cap.max_recv_wr > ib_qib_max_qp_wrs) { | |
1024 | ret = ERR_PTR(-EINVAL); | |
1025 | goto bail; | |
1026 | } | |
1027 | if (init_attr->cap.max_send_sge + | |
1028 | init_attr->cap.max_send_wr + | |
1029 | init_attr->cap.max_recv_sge + | |
1030 | init_attr->cap.max_recv_wr == 0) { | |
1031 | ret = ERR_PTR(-EINVAL); | |
1032 | goto bail; | |
1033 | } | |
1034 | } | |
1035 | ||
1036 | switch (init_attr->qp_type) { | |
1037 | case IB_QPT_SMI: | |
1038 | case IB_QPT_GSI: | |
1039 | if (init_attr->port_num == 0 || | |
1040 | init_attr->port_num > ibpd->device->phys_port_cnt) { | |
1041 | ret = ERR_PTR(-EINVAL); | |
1042 | goto bail; | |
1043 | } | |
1044 | case IB_QPT_UC: | |
1045 | case IB_QPT_RC: | |
1046 | case IB_QPT_UD: | |
7c2e11fe | 1047 | sz = sizeof(struct rvt_sge) * |
f931551b | 1048 | init_attr->cap.max_send_sge + |
7c2e11fe | 1049 | sizeof(struct rvt_swqe); |
fbbeb863 VA |
1050 | swq = __vmalloc((init_attr->cap.max_send_wr + 1) * sz, |
1051 | gfp, PAGE_KERNEL); | |
f931551b RC |
1052 | if (swq == NULL) { |
1053 | ret = ERR_PTR(-ENOMEM); | |
1054 | goto bail; | |
1055 | } | |
1056 | sz = sizeof(*qp); | |
1057 | sg_list_sz = 0; | |
1058 | if (init_attr->srq) { | |
894c727b | 1059 | struct rvt_srq *srq = ibsrq_to_rvtsrq(init_attr->srq); |
f931551b RC |
1060 | |
1061 | if (srq->rq.max_sge > 1) | |
1062 | sg_list_sz = sizeof(*qp->r_sg_list) * | |
1063 | (srq->rq.max_sge - 1); | |
1064 | } else if (init_attr->cap.max_recv_sge > 1) | |
1065 | sg_list_sz = sizeof(*qp->r_sg_list) * | |
1066 | (init_attr->cap.max_recv_sge - 1); | |
fbbeb863 | 1067 | qp = kzalloc(sz + sg_list_sz, gfp); |
f931551b RC |
1068 | if (!qp) { |
1069 | ret = ERR_PTR(-ENOMEM); | |
1070 | goto bail_swq; | |
1071 | } | |
af061a64 | 1072 | RCU_INIT_POINTER(qp->next, NULL); |
ffc26907 DD |
1073 | priv = kzalloc(sizeof(*priv), gfp); |
1074 | if (!priv) { | |
1075 | ret = ERR_PTR(-ENOMEM); | |
1076 | goto bail_qp_hdr; | |
1077 | } | |
1078 | priv->owner = qp; | |
1079 | priv->s_hdr = kzalloc(sizeof(*priv->s_hdr), gfp); | |
1080 | if (!priv->s_hdr) { | |
1c94283d MM |
1081 | ret = ERR_PTR(-ENOMEM); |
1082 | goto bail_qp; | |
1083 | } | |
ffc26907 | 1084 | qp->priv = priv; |
d0f2faf7 MM |
1085 | qp->timeout_jiffies = |
1086 | usecs_to_jiffies((4096UL * (1UL << qp->timeout)) / | |
1087 | 1000UL); | |
f931551b RC |
1088 | if (init_attr->srq) |
1089 | sz = 0; | |
1090 | else { | |
1091 | qp->r_rq.size = init_attr->cap.max_recv_wr + 1; | |
1092 | qp->r_rq.max_sge = init_attr->cap.max_recv_sge; | |
1093 | sz = (sizeof(struct ib_sge) * qp->r_rq.max_sge) + | |
7c2e11fe | 1094 | sizeof(struct rvt_rwqe); |
fbbeb863 VA |
1095 | if (gfp != GFP_NOIO) |
1096 | qp->r_rq.wq = vmalloc_user( | |
7c2e11fe | 1097 | sizeof(struct rvt_rwq) + |
fbbeb863 VA |
1098 | qp->r_rq.size * sz); |
1099 | else | |
1100 | qp->r_rq.wq = __vmalloc( | |
7c2e11fe | 1101 | sizeof(struct rvt_rwq) + |
fbbeb863 VA |
1102 | qp->r_rq.size * sz, |
1103 | gfp, PAGE_KERNEL); | |
1104 | ||
f931551b RC |
1105 | if (!qp->r_rq.wq) { |
1106 | ret = ERR_PTR(-ENOMEM); | |
1107 | goto bail_qp; | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | /* | |
1112 | * ib_create_qp() will initialize qp->ibqp | |
1113 | * except for qp->ibqp.qp_num. | |
1114 | */ | |
1115 | spin_lock_init(&qp->r_lock); | |
1116 | spin_lock_init(&qp->s_lock); | |
1117 | spin_lock_init(&qp->r_rq.lock); | |
1118 | atomic_set(&qp->refcount, 0); | |
1119 | init_waitqueue_head(&qp->wait); | |
ffc26907 | 1120 | init_waitqueue_head(&priv->wait_dma); |
f931551b RC |
1121 | init_timer(&qp->s_timer); |
1122 | qp->s_timer.data = (unsigned long)qp; | |
ffc26907 DD |
1123 | INIT_WORK(&priv->s_work, qib_do_send); |
1124 | INIT_LIST_HEAD(&priv->iowait); | |
f931551b RC |
1125 | INIT_LIST_HEAD(&qp->rspwait); |
1126 | qp->state = IB_QPS_RESET; | |
1127 | qp->s_wq = swq; | |
1128 | qp->s_size = init_attr->cap.max_send_wr + 1; | |
1129 | qp->s_max_sge = init_attr->cap.max_send_sge; | |
1130 | if (init_attr->sq_sig_type == IB_SIGNAL_REQ_WR) | |
01ba79d4 | 1131 | qp->s_flags = RVT_S_SIGNAL_REQ_WR; |
f931551b RC |
1132 | dev = to_idev(ibpd->device); |
1133 | dd = dd_from_dev(dev); | |
898fa52b HC |
1134 | err = alloc_qpn(dd, &dev->rdi.qp_dev->qpn_table, |
1135 | init_attr->qp_type, init_attr->port_num, gfp); | |
f931551b RC |
1136 | if (err < 0) { |
1137 | ret = ERR_PTR(err); | |
1138 | vfree(qp->r_rq.wq); | |
1139 | goto bail_qp; | |
1140 | } | |
1141 | qp->ibqp.qp_num = err; | |
1142 | qp->port_num = init_attr->port_num; | |
f931551b RC |
1143 | qib_reset_qp(qp, init_attr->qp_type); |
1144 | break; | |
1145 | ||
1146 | default: | |
1147 | /* Don't support raw QPs */ | |
1148 | ret = ERR_PTR(-ENOSYS); | |
1149 | goto bail; | |
1150 | } | |
1151 | ||
1152 | init_attr->cap.max_inline_data = 0; | |
1153 | ||
1154 | /* | |
1155 | * Return the address of the RWQ as the offset to mmap. | |
1156 | * See qib_mmap() for details. | |
1157 | */ | |
1158 | if (udata && udata->outlen >= sizeof(__u64)) { | |
1159 | if (!qp->r_rq.wq) { | |
1160 | __u64 offset = 0; | |
1161 | ||
1162 | err = ib_copy_to_udata(udata, &offset, | |
1163 | sizeof(offset)); | |
1164 | if (err) { | |
1165 | ret = ERR_PTR(err); | |
1166 | goto bail_ip; | |
1167 | } | |
1168 | } else { | |
7c2e11fe | 1169 | u32 s = sizeof(struct rvt_rwq) + qp->r_rq.size * sz; |
f931551b | 1170 | |
cd18201f | 1171 | qp->ip = rvt_create_mmap_info(&dev->rdi, s, |
f931551b RC |
1172 | ibpd->uobject->context, |
1173 | qp->r_rq.wq); | |
1174 | if (!qp->ip) { | |
1175 | ret = ERR_PTR(-ENOMEM); | |
1176 | goto bail_ip; | |
1177 | } | |
1178 | ||
1179 | err = ib_copy_to_udata(udata, &(qp->ip->offset), | |
1180 | sizeof(qp->ip->offset)); | |
1181 | if (err) { | |
1182 | ret = ERR_PTR(err); | |
1183 | goto bail_ip; | |
1184 | } | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | spin_lock(&dev->n_qps_lock); | |
1189 | if (dev->n_qps_allocated == ib_qib_max_qps) { | |
1190 | spin_unlock(&dev->n_qps_lock); | |
1191 | ret = ERR_PTR(-ENOMEM); | |
1192 | goto bail_ip; | |
1193 | } | |
1194 | ||
1195 | dev->n_qps_allocated++; | |
1196 | spin_unlock(&dev->n_qps_lock); | |
1197 | ||
1198 | if (qp->ip) { | |
cd18201f HC |
1199 | spin_lock_irq(&dev->rdi.pending_lock); |
1200 | list_add(&qp->ip->pending_mmaps, &dev->rdi.pending_mmaps); | |
1201 | spin_unlock_irq(&dev->rdi.pending_lock); | |
f931551b RC |
1202 | } |
1203 | ||
1204 | ret = &qp->ibqp; | |
1205 | goto bail; | |
1206 | ||
1207 | bail_ip: | |
1208 | if (qp->ip) | |
cd18201f | 1209 | kref_put(&qp->ip->ref, rvt_release_mmap_info); |
f931551b RC |
1210 | else |
1211 | vfree(qp->r_rq.wq); | |
898fa52b | 1212 | free_qpn(&dev->rdi.qp_dev->qpn_table, qp->ibqp.qp_num); |
f931551b | 1213 | bail_qp: |
ffc26907 DD |
1214 | kfree(priv->s_hdr); |
1215 | kfree(priv); | |
1216 | bail_qp_hdr: | |
f931551b RC |
1217 | kfree(qp); |
1218 | bail_swq: | |
1219 | vfree(swq); | |
1220 | bail: | |
1221 | return ret; | |
1222 | } | |
1223 | ||
1224 | /** | |
1225 | * qib_destroy_qp - destroy a queue pair | |
1226 | * @ibqp: the queue pair to destroy | |
1227 | * | |
1228 | * Returns 0 on success. | |
1229 | * | |
1230 | * Note that this can be called while the QP is actively sending or | |
1231 | * receiving! | |
1232 | */ | |
1233 | int qib_destroy_qp(struct ib_qp *ibqp) | |
1234 | { | |
7c2e11fe | 1235 | struct rvt_qp *qp = to_iqp(ibqp); |
f931551b | 1236 | struct qib_ibdev *dev = to_idev(ibqp->device); |
ffc26907 | 1237 | struct qib_qp_priv *priv = qp->priv; |
f931551b RC |
1238 | |
1239 | /* Make sure HW and driver activity is stopped. */ | |
1240 | spin_lock_irq(&qp->s_lock); | |
1241 | if (qp->state != IB_QPS_RESET) { | |
1242 | qp->state = IB_QPS_RESET; | |
cd18201f | 1243 | spin_lock(&dev->rdi.pending_lock); |
ffc26907 DD |
1244 | if (!list_empty(&priv->iowait)) |
1245 | list_del_init(&priv->iowait); | |
cd18201f | 1246 | spin_unlock(&dev->rdi.pending_lock); |
01ba79d4 | 1247 | qp->s_flags &= ~(RVT_S_TIMER | RVT_S_ANY_WAIT); |
f931551b | 1248 | spin_unlock_irq(&qp->s_lock); |
ffc26907 | 1249 | cancel_work_sync(&priv->s_work); |
f931551b | 1250 | del_timer_sync(&qp->s_timer); |
ffc26907 DD |
1251 | wait_event(priv->wait_dma, !atomic_read(&priv->s_dma_busy)); |
1252 | if (priv->s_tx) { | |
1253 | qib_put_txreq(priv->s_tx); | |
1254 | priv->s_tx = NULL; | |
f931551b RC |
1255 | } |
1256 | remove_qp(dev, qp); | |
1257 | wait_event(qp->wait, !atomic_read(&qp->refcount)); | |
1258 | clear_mr_refs(qp, 1); | |
1259 | } else | |
1260 | spin_unlock_irq(&qp->s_lock); | |
1261 | ||
1262 | /* all user's cleaned up, mark it available */ | |
898fa52b | 1263 | free_qpn(&dev->rdi.qp_dev->qpn_table, qp->ibqp.qp_num); |
f931551b RC |
1264 | spin_lock(&dev->n_qps_lock); |
1265 | dev->n_qps_allocated--; | |
1266 | spin_unlock(&dev->n_qps_lock); | |
1267 | ||
1268 | if (qp->ip) | |
cd18201f | 1269 | kref_put(&qp->ip->ref, rvt_release_mmap_info); |
f931551b RC |
1270 | else |
1271 | vfree(qp->r_rq.wq); | |
1272 | vfree(qp->s_wq); | |
ffc26907 DD |
1273 | kfree(priv->s_hdr); |
1274 | kfree(priv); | |
f931551b RC |
1275 | kfree(qp); |
1276 | return 0; | |
1277 | } | |
1278 | ||
1279 | /** | |
1280 | * qib_init_qpn_table - initialize the QP number table for a device | |
1281 | * @qpt: the QPN table | |
1282 | */ | |
898fa52b | 1283 | void qib_init_qpn_table(struct qib_devdata *dd, struct rvt_qpn_table *qpt) |
f931551b RC |
1284 | { |
1285 | spin_lock_init(&qpt->lock); | |
1286 | qpt->last = 1; /* start with QPN 2 */ | |
1287 | qpt->nmaps = 1; | |
898fa52b | 1288 | qpt_mask = dd->qpn_mask; |
f931551b RC |
1289 | } |
1290 | ||
1291 | /** | |
1292 | * qib_free_qpn_table - free the QP number table for a device | |
1293 | * @qpt: the QPN table | |
1294 | */ | |
898fa52b | 1295 | void qib_free_qpn_table(struct rvt_qpn_table *qpt) |
f931551b RC |
1296 | { |
1297 | int i; | |
1298 | ||
1299 | for (i = 0; i < ARRAY_SIZE(qpt->map); i++) | |
1300 | if (qpt->map[i].page) | |
1301 | free_page((unsigned long) qpt->map[i].page); | |
1302 | } | |
1303 | ||
1304 | /** | |
1305 | * qib_get_credit - flush the send work queue of a QP | |
1306 | * @qp: the qp who's send work queue to flush | |
1307 | * @aeth: the Acknowledge Extended Transport Header | |
1308 | * | |
1309 | * The QP s_lock should be held. | |
1310 | */ | |
7c2e11fe | 1311 | void qib_get_credit(struct rvt_qp *qp, u32 aeth) |
f931551b RC |
1312 | { |
1313 | u32 credit = (aeth >> QIB_AETH_CREDIT_SHIFT) & QIB_AETH_CREDIT_MASK; | |
1314 | ||
1315 | /* | |
1316 | * If the credit is invalid, we can send | |
1317 | * as many packets as we like. Otherwise, we have to | |
1318 | * honor the credit field. | |
1319 | */ | |
1320 | if (credit == QIB_AETH_CREDIT_INVAL) { | |
01ba79d4 HC |
1321 | if (!(qp->s_flags & RVT_S_UNLIMITED_CREDIT)) { |
1322 | qp->s_flags |= RVT_S_UNLIMITED_CREDIT; | |
1323 | if (qp->s_flags & RVT_S_WAIT_SSN_CREDIT) { | |
1324 | qp->s_flags &= ~RVT_S_WAIT_SSN_CREDIT; | |
f931551b RC |
1325 | qib_schedule_send(qp); |
1326 | } | |
1327 | } | |
01ba79d4 | 1328 | } else if (!(qp->s_flags & RVT_S_UNLIMITED_CREDIT)) { |
f931551b RC |
1329 | /* Compute new LSN (i.e., MSN + credit) */ |
1330 | credit = (aeth + credit_table[credit]) & QIB_MSN_MASK; | |
1331 | if (qib_cmp24(credit, qp->s_lsn) > 0) { | |
1332 | qp->s_lsn = credit; | |
01ba79d4 HC |
1333 | if (qp->s_flags & RVT_S_WAIT_SSN_CREDIT) { |
1334 | qp->s_flags &= ~RVT_S_WAIT_SSN_CREDIT; | |
f931551b RC |
1335 | qib_schedule_send(qp); |
1336 | } | |
1337 | } | |
1338 | } | |
1339 | } | |
1dd173b0 MM |
1340 | |
1341 | #ifdef CONFIG_DEBUG_FS | |
1342 | ||
1343 | struct qib_qp_iter { | |
1344 | struct qib_ibdev *dev; | |
7c2e11fe | 1345 | struct rvt_qp *qp; |
1dd173b0 MM |
1346 | int n; |
1347 | }; | |
1348 | ||
1349 | struct qib_qp_iter *qib_qp_iter_init(struct qib_ibdev *dev) | |
1350 | { | |
1351 | struct qib_qp_iter *iter; | |
1352 | ||
1353 | iter = kzalloc(sizeof(*iter), GFP_KERNEL); | |
1354 | if (!iter) | |
1355 | return NULL; | |
1356 | ||
1357 | iter->dev = dev; | |
1358 | if (qib_qp_iter_next(iter)) { | |
1359 | kfree(iter); | |
1360 | return NULL; | |
1361 | } | |
1362 | ||
1363 | return iter; | |
1364 | } | |
1365 | ||
1366 | int qib_qp_iter_next(struct qib_qp_iter *iter) | |
1367 | { | |
1368 | struct qib_ibdev *dev = iter->dev; | |
1369 | int n = iter->n; | |
1370 | int ret = 1; | |
7c2e11fe DD |
1371 | struct rvt_qp *pqp = iter->qp; |
1372 | struct rvt_qp *qp; | |
1dd173b0 | 1373 | |
898fa52b | 1374 | for (; n < dev->rdi.qp_dev->qp_table_size; n++) { |
1dd173b0 MM |
1375 | if (pqp) |
1376 | qp = rcu_dereference(pqp->next); | |
1377 | else | |
898fa52b | 1378 | qp = rcu_dereference(dev->rdi.qp_dev->qp_table[n]); |
1dd173b0 MM |
1379 | pqp = qp; |
1380 | if (qp) { | |
1dd173b0 MM |
1381 | iter->qp = qp; |
1382 | iter->n = n; | |
1383 | return 0; | |
1384 | } | |
1385 | } | |
1dd173b0 MM |
1386 | return ret; |
1387 | } | |
1388 | ||
1389 | static const char * const qp_type_str[] = { | |
1390 | "SMI", "GSI", "RC", "UC", "UD", | |
1391 | }; | |
1392 | ||
1393 | void qib_qp_iter_print(struct seq_file *s, struct qib_qp_iter *iter) | |
1394 | { | |
7c2e11fe DD |
1395 | struct rvt_swqe *wqe; |
1396 | struct rvt_qp *qp = iter->qp; | |
ffc26907 | 1397 | struct qib_qp_priv *priv = qp->priv; |
1dd173b0 MM |
1398 | |
1399 | wqe = get_swqe_ptr(qp, qp->s_last); | |
1400 | seq_printf(s, | |
1401 | "N %d QP%u %s %u %u %u f=%x %u %u %u %u %u PSN %x %x %x %x %x (%u %u %u %u %u %u) QP%u LID %x\n", | |
1402 | iter->n, | |
1403 | qp->ibqp.qp_num, | |
1404 | qp_type_str[qp->ibqp.qp_type], | |
1405 | qp->state, | |
1406 | wqe->wr.opcode, | |
1407 | qp->s_hdrwords, | |
1408 | qp->s_flags, | |
ffc26907 DD |
1409 | atomic_read(&priv->s_dma_busy), |
1410 | !list_empty(&priv->iowait), | |
1dd173b0 MM |
1411 | qp->timeout, |
1412 | wqe->ssn, | |
1413 | qp->s_lsn, | |
1414 | qp->s_last_psn, | |
1415 | qp->s_psn, qp->s_next_psn, | |
1416 | qp->s_sending_psn, qp->s_sending_hpsn, | |
1417 | qp->s_last, qp->s_acked, qp->s_cur, | |
1418 | qp->s_tail, qp->s_head, qp->s_size, | |
1419 | qp->remote_qpn, | |
1420 | qp->remote_ah_attr.dlid); | |
1421 | } | |
1422 | ||
1423 | #endif |