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Commit | Line | Data |
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b518d3e6 | 1 | /* |
fe2ac047 | 2 | * Copyright(c) 2016 - 2019 Intel Corporation. |
b518d3e6 DD |
3 | * |
4 | * This file is provided under a dual BSD/GPLv2 license. When using or | |
5 | * redistributing this file, you may do so under either license. | |
6 | * | |
7 | * GPL LICENSE SUMMARY | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of version 2 of the GNU General Public License as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * BSD LICENSE | |
19 | * | |
20 | * Redistribution and use in source and binary forms, with or without | |
21 | * modification, are permitted provided that the following conditions | |
22 | * are met: | |
23 | * | |
24 | * - Redistributions of source code must retain the above copyright | |
25 | * notice, this list of conditions and the following disclaimer. | |
26 | * - Redistributions in binary form must reproduce the above copyright | |
27 | * notice, this list of conditions and the following disclaimer in | |
28 | * the documentation and/or other materials provided with the | |
29 | * distribution. | |
30 | * - Neither the name of Intel Corporation nor the names of its | |
31 | * contributors may be used to endorse or promote products derived | |
32 | * from this software without specific prior written permission. | |
33 | * | |
34 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
35 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
36 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
37 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
38 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
39 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
40 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
41 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
42 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
43 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
44 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
45 | * | |
46 | */ | |
47 | ||
3b0b3fb3 | 48 | #include <linux/hash.h> |
0acb0cc7 DD |
49 | #include <linux/bitops.h> |
50 | #include <linux/lockdep.h> | |
515667f8 DD |
51 | #include <linux/vmalloc.h> |
52 | #include <linux/slab.h> | |
53 | #include <rdma/ib_verbs.h> | |
832666c1 | 54 | #include <rdma/ib_hdrs.h> |
13c19222 | 55 | #include <rdma/opa_addr.h> |
89944450 | 56 | #include <rdma/uverbs_ioctl.h> |
b518d3e6 | 57 | #include "qp.h" |
515667f8 | 58 | #include "vt.h" |
3b0b3fb3 | 59 | #include "trace.h" |
b518d3e6 | 60 | |
f592ae3c KA |
61 | #define RVT_RWQ_COUNT_THRESHOLD 16 |
62 | ||
a2930e5c | 63 | static void rvt_rc_timeout(struct timer_list *t); |
f92e4871 KW |
64 | static void rvt_reset_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, |
65 | enum ib_qp_type type); | |
11a10d4b VSD |
66 | |
67 | /* | |
68 | * Convert the AETH RNR timeout code into the number of microseconds. | |
69 | */ | |
70 | static const u32 ib_rvt_rnr_table[32] = { | |
71 | 655360, /* 00: 655.36 */ | |
72 | 10, /* 01: .01 */ | |
73 | 20, /* 02 .02 */ | |
74 | 30, /* 03: .03 */ | |
75 | 40, /* 04: .04 */ | |
76 | 60, /* 05: .06 */ | |
77 | 80, /* 06: .08 */ | |
78 | 120, /* 07: .12 */ | |
79 | 160, /* 08: .16 */ | |
80 | 240, /* 09: .24 */ | |
81 | 320, /* 0A: .32 */ | |
82 | 480, /* 0B: .48 */ | |
83 | 640, /* 0C: .64 */ | |
84 | 960, /* 0D: .96 */ | |
85 | 1280, /* 0E: 1.28 */ | |
86 | 1920, /* 0F: 1.92 */ | |
87 | 2560, /* 10: 2.56 */ | |
88 | 3840, /* 11: 3.84 */ | |
89 | 5120, /* 12: 5.12 */ | |
90 | 7680, /* 13: 7.68 */ | |
91 | 10240, /* 14: 10.24 */ | |
92 | 15360, /* 15: 15.36 */ | |
93 | 20480, /* 16: 20.48 */ | |
94 | 30720, /* 17: 30.72 */ | |
95 | 40960, /* 18: 40.96 */ | |
96 | 61440, /* 19: 61.44 */ | |
97 | 81920, /* 1A: 81.92 */ | |
98 | 122880, /* 1B: 122.88 */ | |
99 | 163840, /* 1C: 163.84 */ | |
100 | 245760, /* 1D: 245.76 */ | |
101 | 327680, /* 1E: 327.68 */ | |
102 | 491520 /* 1F: 491.52 */ | |
103 | }; | |
104 | ||
bfbac097 DD |
105 | /* |
106 | * Note that it is OK to post send work requests in the SQE and ERR | |
107 | * states; rvt_do_send() will process them and generate error | |
108 | * completions as per IB 1.2 C10-96. | |
109 | */ | |
110 | const int ib_rvt_state_ops[IB_QPS_ERR + 1] = { | |
111 | [IB_QPS_RESET] = 0, | |
112 | [IB_QPS_INIT] = RVT_POST_RECV_OK, | |
113 | [IB_QPS_RTR] = RVT_POST_RECV_OK | RVT_PROCESS_RECV_OK, | |
114 | [IB_QPS_RTS] = RVT_POST_RECV_OK | RVT_PROCESS_RECV_OK | | |
115 | RVT_POST_SEND_OK | RVT_PROCESS_SEND_OK | | |
116 | RVT_PROCESS_NEXT_SEND_OK, | |
117 | [IB_QPS_SQD] = RVT_POST_RECV_OK | RVT_PROCESS_RECV_OK | | |
118 | RVT_POST_SEND_OK | RVT_PROCESS_SEND_OK, | |
119 | [IB_QPS_SQE] = RVT_POST_RECV_OK | RVT_PROCESS_RECV_OK | | |
120 | RVT_POST_SEND_OK | RVT_FLUSH_SEND, | |
121 | [IB_QPS_ERR] = RVT_POST_RECV_OK | RVT_FLUSH_RECV | | |
122 | RVT_POST_SEND_OK | RVT_FLUSH_SEND, | |
123 | }; | |
124 | EXPORT_SYMBOL(ib_rvt_state_ops); | |
125 | ||
019f118b BW |
126 | /* platform specific: return the last level cache (llc) size, in KiB */ |
127 | static int rvt_wss_llc_size(void) | |
128 | { | |
129 | /* assume that the boot CPU value is universal for all CPUs */ | |
130 | return boot_cpu_data.x86_cache_size; | |
131 | } | |
132 | ||
133 | /* platform specific: cacheless copy */ | |
134 | static void cacheless_memcpy(void *dst, void *src, size_t n) | |
135 | { | |
136 | /* | |
137 | * Use the only available X64 cacheless copy. Add a __user cast | |
138 | * to quiet sparse. The src agument is already in the kernel so | |
139 | * there are no security issues. The extra fault recovery machinery | |
140 | * is not invoked. | |
141 | */ | |
142 | __copy_user_nocache(dst, (void __user *)src, n, 0); | |
143 | } | |
144 | ||
145 | void rvt_wss_exit(struct rvt_dev_info *rdi) | |
146 | { | |
147 | struct rvt_wss *wss = rdi->wss; | |
148 | ||
149 | if (!wss) | |
150 | return; | |
151 | ||
152 | /* coded to handle partially initialized and repeat callers */ | |
153 | kfree(wss->entries); | |
154 | wss->entries = NULL; | |
155 | kfree(rdi->wss); | |
156 | rdi->wss = NULL; | |
157 | } | |
158 | ||
159 | /** | |
160 | * rvt_wss_init - Init wss data structures | |
161 | * | |
162 | * Return: 0 on success | |
163 | */ | |
164 | int rvt_wss_init(struct rvt_dev_info *rdi) | |
165 | { | |
166 | unsigned int sge_copy_mode = rdi->dparms.sge_copy_mode; | |
167 | unsigned int wss_threshold = rdi->dparms.wss_threshold; | |
168 | unsigned int wss_clean_period = rdi->dparms.wss_clean_period; | |
169 | long llc_size; | |
170 | long llc_bits; | |
171 | long table_size; | |
172 | long table_bits; | |
173 | struct rvt_wss *wss; | |
174 | int node = rdi->dparms.node; | |
175 | ||
176 | if (sge_copy_mode != RVT_SGE_COPY_ADAPTIVE) { | |
177 | rdi->wss = NULL; | |
178 | return 0; | |
179 | } | |
180 | ||
181 | rdi->wss = kzalloc_node(sizeof(*rdi->wss), GFP_KERNEL, node); | |
182 | if (!rdi->wss) | |
183 | return -ENOMEM; | |
184 | wss = rdi->wss; | |
185 | ||
186 | /* check for a valid percent range - default to 80 if none or invalid */ | |
187 | if (wss_threshold < 1 || wss_threshold > 100) | |
188 | wss_threshold = 80; | |
189 | ||
190 | /* reject a wildly large period */ | |
191 | if (wss_clean_period > 1000000) | |
192 | wss_clean_period = 256; | |
193 | ||
194 | /* reject a zero period */ | |
195 | if (wss_clean_period == 0) | |
196 | wss_clean_period = 1; | |
197 | ||
198 | /* | |
199 | * Calculate the table size - the next power of 2 larger than the | |
200 | * LLC size. LLC size is in KiB. | |
201 | */ | |
202 | llc_size = rvt_wss_llc_size() * 1024; | |
203 | table_size = roundup_pow_of_two(llc_size); | |
204 | ||
205 | /* one bit per page in rounded up table */ | |
206 | llc_bits = llc_size / PAGE_SIZE; | |
207 | table_bits = table_size / PAGE_SIZE; | |
208 | wss->pages_mask = table_bits - 1; | |
209 | wss->num_entries = table_bits / BITS_PER_LONG; | |
210 | ||
211 | wss->threshold = (llc_bits * wss_threshold) / 100; | |
212 | if (wss->threshold == 0) | |
213 | wss->threshold = 1; | |
214 | ||
215 | wss->clean_period = wss_clean_period; | |
216 | atomic_set(&wss->clean_counter, wss_clean_period); | |
217 | ||
218 | wss->entries = kcalloc_node(wss->num_entries, sizeof(*wss->entries), | |
219 | GFP_KERNEL, node); | |
220 | if (!wss->entries) { | |
221 | rvt_wss_exit(rdi); | |
222 | return -ENOMEM; | |
223 | } | |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
228 | /* | |
229 | * Advance the clean counter. When the clean period has expired, | |
230 | * clean an entry. | |
231 | * | |
232 | * This is implemented in atomics to avoid locking. Because multiple | |
233 | * variables are involved, it can be racy which can lead to slightly | |
234 | * inaccurate information. Since this is only a heuristic, this is | |
235 | * OK. Any innaccuracies will clean themselves out as the counter | |
236 | * advances. That said, it is unlikely the entry clean operation will | |
237 | * race - the next possible racer will not start until the next clean | |
238 | * period. | |
239 | * | |
240 | * The clean counter is implemented as a decrement to zero. When zero | |
241 | * is reached an entry is cleaned. | |
242 | */ | |
243 | static void wss_advance_clean_counter(struct rvt_wss *wss) | |
244 | { | |
245 | int entry; | |
246 | int weight; | |
247 | unsigned long bits; | |
248 | ||
249 | /* become the cleaner if we decrement the counter to zero */ | |
250 | if (atomic_dec_and_test(&wss->clean_counter)) { | |
251 | /* | |
252 | * Set, not add, the clean period. This avoids an issue | |
253 | * where the counter could decrement below the clean period. | |
254 | * Doing a set can result in lost decrements, slowing the | |
255 | * clean advance. Since this a heuristic, this possible | |
256 | * slowdown is OK. | |
257 | * | |
258 | * An alternative is to loop, advancing the counter by a | |
259 | * clean period until the result is > 0. However, this could | |
260 | * lead to several threads keeping another in the clean loop. | |
261 | * This could be mitigated by limiting the number of times | |
262 | * we stay in the loop. | |
263 | */ | |
264 | atomic_set(&wss->clean_counter, wss->clean_period); | |
265 | ||
266 | /* | |
267 | * Uniquely grab the entry to clean and move to next. | |
268 | * The current entry is always the lower bits of | |
269 | * wss.clean_entry. The table size, wss.num_entries, | |
270 | * is always a power-of-2. | |
271 | */ | |
272 | entry = (atomic_inc_return(&wss->clean_entry) - 1) | |
273 | & (wss->num_entries - 1); | |
274 | ||
275 | /* clear the entry and count the bits */ | |
276 | bits = xchg(&wss->entries[entry], 0); | |
277 | weight = hweight64((u64)bits); | |
278 | /* only adjust the contended total count if needed */ | |
279 | if (weight) | |
280 | atomic_sub(weight, &wss->total_count); | |
281 | } | |
282 | } | |
283 | ||
284 | /* | |
285 | * Insert the given address into the working set array. | |
286 | */ | |
287 | static void wss_insert(struct rvt_wss *wss, void *address) | |
288 | { | |
289 | u32 page = ((unsigned long)address >> PAGE_SHIFT) & wss->pages_mask; | |
290 | u32 entry = page / BITS_PER_LONG; /* assumes this ends up a shift */ | |
291 | u32 nr = page & (BITS_PER_LONG - 1); | |
292 | ||
293 | if (!test_and_set_bit(nr, &wss->entries[entry])) | |
294 | atomic_inc(&wss->total_count); | |
295 | ||
296 | wss_advance_clean_counter(wss); | |
297 | } | |
298 | ||
299 | /* | |
300 | * Is the working set larger than the threshold? | |
301 | */ | |
302 | static inline bool wss_exceeds_threshold(struct rvt_wss *wss) | |
303 | { | |
304 | return atomic_read(&wss->total_count) >= wss->threshold; | |
305 | } | |
306 | ||
d2b8d4da | 307 | static void get_map_page(struct rvt_qpn_table *qpt, |
0f4d027c | 308 | struct rvt_qpn_map *map) |
0acb0cc7 | 309 | { |
0f4d027c | 310 | unsigned long page = get_zeroed_page(GFP_KERNEL); |
0acb0cc7 DD |
311 | |
312 | /* | |
313 | * Free the page if someone raced with us installing it. | |
314 | */ | |
315 | ||
316 | spin_lock(&qpt->lock); | |
317 | if (map->page) | |
318 | free_page(page); | |
319 | else | |
320 | map->page = (void *)page; | |
321 | spin_unlock(&qpt->lock); | |
322 | } | |
323 | ||
324 | /** | |
325 | * init_qpn_table - initialize the QP number table for a device | |
326 | * @qpt: the QPN table | |
327 | */ | |
328 | static int init_qpn_table(struct rvt_dev_info *rdi, struct rvt_qpn_table *qpt) | |
329 | { | |
330 | u32 offset, i; | |
331 | struct rvt_qpn_map *map; | |
332 | int ret = 0; | |
333 | ||
fef2efd6 | 334 | if (!(rdi->dparms.qpn_res_end >= rdi->dparms.qpn_res_start)) |
0acb0cc7 DD |
335 | return -EINVAL; |
336 | ||
337 | spin_lock_init(&qpt->lock); | |
338 | ||
339 | qpt->last = rdi->dparms.qpn_start; | |
340 | qpt->incr = rdi->dparms.qpn_inc << rdi->dparms.qos_shift; | |
341 | ||
342 | /* | |
343 | * Drivers may want some QPs beyond what we need for verbs let them use | |
344 | * our qpn table. No need for two. Lets go ahead and mark the bitmaps | |
345 | * for those. The reserved range must be *after* the range which verbs | |
346 | * will pick from. | |
347 | */ | |
348 | ||
349 | /* Figure out number of bit maps needed before reserved range */ | |
350 | qpt->nmaps = rdi->dparms.qpn_res_start / RVT_BITS_PER_PAGE; | |
351 | ||
352 | /* This should always be zero */ | |
353 | offset = rdi->dparms.qpn_res_start & RVT_BITS_PER_PAGE_MASK; | |
354 | ||
355 | /* Starting with the first reserved bit map */ | |
356 | map = &qpt->map[qpt->nmaps]; | |
357 | ||
358 | rvt_pr_info(rdi, "Reserving QPNs from 0x%x to 0x%x for non-verbs use\n", | |
359 | rdi->dparms.qpn_res_start, rdi->dparms.qpn_res_end); | |
fef2efd6 | 360 | for (i = rdi->dparms.qpn_res_start; i <= rdi->dparms.qpn_res_end; i++) { |
0acb0cc7 | 361 | if (!map->page) { |
0f4d027c | 362 | get_map_page(qpt, map); |
0acb0cc7 DD |
363 | if (!map->page) { |
364 | ret = -ENOMEM; | |
365 | break; | |
366 | } | |
367 | } | |
368 | set_bit(offset, map->page); | |
369 | offset++; | |
370 | if (offset == RVT_BITS_PER_PAGE) { | |
371 | /* next page */ | |
372 | qpt->nmaps++; | |
373 | map++; | |
374 | offset = 0; | |
375 | } | |
376 | } | |
377 | return ret; | |
378 | } | |
379 | ||
380 | /** | |
381 | * free_qpn_table - free the QP number table for a device | |
382 | * @qpt: the QPN table | |
383 | */ | |
384 | static void free_qpn_table(struct rvt_qpn_table *qpt) | |
385 | { | |
386 | int i; | |
387 | ||
388 | for (i = 0; i < ARRAY_SIZE(qpt->map); i++) | |
389 | free_page((unsigned long)qpt->map[i].page); | |
390 | } | |
391 | ||
90793f71 DD |
392 | /** |
393 | * rvt_driver_qp_init - Init driver qp resources | |
394 | * @rdi: rvt dev strucutre | |
395 | * | |
396 | * Return: 0 on success | |
397 | */ | |
0acb0cc7 DD |
398 | int rvt_driver_qp_init(struct rvt_dev_info *rdi) |
399 | { | |
400 | int i; | |
401 | int ret = -ENOMEM; | |
402 | ||
0acb0cc7 DD |
403 | if (!rdi->dparms.qp_table_size) |
404 | return -EINVAL; | |
405 | ||
406 | /* | |
407 | * If driver is not doing any QP allocation then make sure it is | |
408 | * providing the necessary QP functions. | |
409 | */ | |
515667f8 DD |
410 | if (!rdi->driver_f.free_all_qps || |
411 | !rdi->driver_f.qp_priv_alloc || | |
412 | !rdi->driver_f.qp_priv_free || | |
11a10d4b VSD |
413 | !rdi->driver_f.notify_qp_reset || |
414 | !rdi->driver_f.notify_restart_rc) | |
0acb0cc7 DD |
415 | return -EINVAL; |
416 | ||
417 | /* allocate parent object */ | |
d1b697b6 MH |
418 | rdi->qp_dev = kzalloc_node(sizeof(*rdi->qp_dev), GFP_KERNEL, |
419 | rdi->dparms.node); | |
0acb0cc7 DD |
420 | if (!rdi->qp_dev) |
421 | return -ENOMEM; | |
422 | ||
423 | /* allocate hash table */ | |
424 | rdi->qp_dev->qp_table_size = rdi->dparms.qp_table_size; | |
425 | rdi->qp_dev->qp_table_bits = ilog2(rdi->dparms.qp_table_size); | |
426 | rdi->qp_dev->qp_table = | |
3c073478 | 427 | kmalloc_array_node(rdi->qp_dev->qp_table_size, |
d1b697b6 MH |
428 | sizeof(*rdi->qp_dev->qp_table), |
429 | GFP_KERNEL, rdi->dparms.node); | |
0acb0cc7 DD |
430 | if (!rdi->qp_dev->qp_table) |
431 | goto no_qp_table; | |
432 | ||
433 | for (i = 0; i < rdi->qp_dev->qp_table_size; i++) | |
434 | RCU_INIT_POINTER(rdi->qp_dev->qp_table[i], NULL); | |
435 | ||
436 | spin_lock_init(&rdi->qp_dev->qpt_lock); | |
437 | ||
438 | /* initialize qpn map */ | |
439 | if (init_qpn_table(rdi, &rdi->qp_dev->qpn_table)) | |
440 | goto fail_table; | |
441 | ||
515667f8 DD |
442 | spin_lock_init(&rdi->n_qps_lock); |
443 | ||
444 | return 0; | |
0acb0cc7 DD |
445 | |
446 | fail_table: | |
447 | kfree(rdi->qp_dev->qp_table); | |
448 | free_qpn_table(&rdi->qp_dev->qpn_table); | |
449 | ||
450 | no_qp_table: | |
451 | kfree(rdi->qp_dev); | |
452 | ||
453 | return ret; | |
454 | } | |
455 | ||
456 | /** | |
f92e4871 KW |
457 | * rvt_free_qp_cb - callback function to reset a qp |
458 | * @qp: the qp to reset | |
459 | * @v: a 64-bit value | |
460 | * | |
461 | * This function resets the qp and removes it from the | |
462 | * qp hash table. | |
463 | */ | |
464 | static void rvt_free_qp_cb(struct rvt_qp *qp, u64 v) | |
465 | { | |
466 | unsigned int *qp_inuse = (unsigned int *)v; | |
467 | struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device); | |
468 | ||
469 | /* Reset the qp and remove it from the qp hash list */ | |
470 | rvt_reset_qp(rdi, qp, qp->ibqp.qp_type); | |
471 | ||
472 | /* Increment the qp_inuse count */ | |
473 | (*qp_inuse)++; | |
474 | } | |
475 | ||
476 | /** | |
477 | * rvt_free_all_qps - check for QPs still in use | |
4f9a3018 | 478 | * @rdi: rvt device info structure |
0acb0cc7 DD |
479 | * |
480 | * There should not be any QPs still in use. | |
481 | * Free memory for table. | |
f92e4871 | 482 | * Return the number of QPs still in use. |
0acb0cc7 | 483 | */ |
515667f8 | 484 | static unsigned rvt_free_all_qps(struct rvt_dev_info *rdi) |
0acb0cc7 | 485 | { |
f92e4871 | 486 | unsigned int qp_inuse = 0; |
0acb0cc7 | 487 | |
4e74080b DD |
488 | qp_inuse += rvt_mcast_tree_empty(rdi); |
489 | ||
f92e4871 KW |
490 | rvt_qp_iter(rdi, (u64)&qp_inuse, rvt_free_qp_cb); |
491 | ||
0acb0cc7 DD |
492 | return qp_inuse; |
493 | } | |
494 | ||
90793f71 DD |
495 | /** |
496 | * rvt_qp_exit - clean up qps on device exit | |
497 | * @rdi: rvt dev structure | |
498 | * | |
499 | * Check for qp leaks and free resources. | |
500 | */ | |
0acb0cc7 DD |
501 | void rvt_qp_exit(struct rvt_dev_info *rdi) |
502 | { | |
515667f8 | 503 | u32 qps_inuse = rvt_free_all_qps(rdi); |
0acb0cc7 | 504 | |
0acb0cc7 DD |
505 | if (qps_inuse) |
506 | rvt_pr_err(rdi, "QP memory leak! %u still in use\n", | |
507 | qps_inuse); | |
508 | if (!rdi->qp_dev) | |
509 | return; | |
510 | ||
511 | kfree(rdi->qp_dev->qp_table); | |
512 | free_qpn_table(&rdi->qp_dev->qpn_table); | |
513 | kfree(rdi->qp_dev); | |
514 | } | |
515 | ||
515667f8 DD |
516 | static inline unsigned mk_qpn(struct rvt_qpn_table *qpt, |
517 | struct rvt_qpn_map *map, unsigned off) | |
518 | { | |
519 | return (map - qpt->map) * RVT_BITS_PER_PAGE + off; | |
520 | } | |
521 | ||
f1badc71 DD |
522 | /** |
523 | * alloc_qpn - Allocate the next available qpn or zero/one for QP type | |
524 | * IB_QPT_SMI/IB_QPT_GSI | |
4f9a3018 RD |
525 | * @rdi: rvt device info structure |
526 | * @qpt: queue pair number table pointer | |
527 | * @port_num: IB port number, 1 based, comes from core | |
f1badc71 DD |
528 | * |
529 | * Return: The queue pair number | |
515667f8 DD |
530 | */ |
531 | static int alloc_qpn(struct rvt_dev_info *rdi, struct rvt_qpn_table *qpt, | |
0f4d027c | 532 | enum ib_qp_type type, u8 port_num) |
515667f8 DD |
533 | { |
534 | u32 i, offset, max_scan, qpn; | |
535 | struct rvt_qpn_map *map; | |
536 | u32 ret; | |
537 | ||
538 | if (rdi->driver_f.alloc_qpn) | |
0f4d027c | 539 | return rdi->driver_f.alloc_qpn(rdi, qpt, type, port_num); |
515667f8 DD |
540 | |
541 | if (type == IB_QPT_SMI || type == IB_QPT_GSI) { | |
542 | unsigned n; | |
543 | ||
544 | ret = type == IB_QPT_GSI; | |
f1badc71 | 545 | n = 1 << (ret + 2 * (port_num - 1)); |
515667f8 DD |
546 | spin_lock(&qpt->lock); |
547 | if (qpt->flags & n) | |
548 | ret = -EINVAL; | |
549 | else | |
550 | qpt->flags |= n; | |
551 | spin_unlock(&qpt->lock); | |
552 | goto bail; | |
553 | } | |
554 | ||
555 | qpn = qpt->last + qpt->incr; | |
556 | if (qpn >= RVT_QPN_MAX) | |
557 | qpn = qpt->incr | ((qpt->last & 1) ^ 1); | |
558 | /* offset carries bit 0 */ | |
559 | offset = qpn & RVT_BITS_PER_PAGE_MASK; | |
560 | map = &qpt->map[qpn / RVT_BITS_PER_PAGE]; | |
561 | max_scan = qpt->nmaps - !offset; | |
562 | for (i = 0;;) { | |
563 | if (unlikely(!map->page)) { | |
0f4d027c | 564 | get_map_page(qpt, map); |
515667f8 DD |
565 | if (unlikely(!map->page)) |
566 | break; | |
567 | } | |
568 | do { | |
569 | if (!test_and_set_bit(offset, map->page)) { | |
570 | qpt->last = qpn; | |
571 | ret = qpn; | |
572 | goto bail; | |
573 | } | |
574 | offset += qpt->incr; | |
575 | /* | |
576 | * This qpn might be bogus if offset >= BITS_PER_PAGE. | |
577 | * That is OK. It gets re-assigned below | |
578 | */ | |
579 | qpn = mk_qpn(qpt, map, offset); | |
580 | } while (offset < RVT_BITS_PER_PAGE && qpn < RVT_QPN_MAX); | |
581 | /* | |
582 | * In order to keep the number of pages allocated to a | |
583 | * minimum, we scan the all existing pages before increasing | |
584 | * the size of the bitmap table. | |
585 | */ | |
586 | if (++i > max_scan) { | |
587 | if (qpt->nmaps == RVT_QPNMAP_ENTRIES) | |
588 | break; | |
589 | map = &qpt->map[qpt->nmaps++]; | |
590 | /* start at incr with current bit 0 */ | |
591 | offset = qpt->incr | (offset & 1); | |
592 | } else if (map < &qpt->map[qpt->nmaps]) { | |
593 | ++map; | |
594 | /* start at incr with current bit 0 */ | |
595 | offset = qpt->incr | (offset & 1); | |
596 | } else { | |
597 | map = &qpt->map[0]; | |
598 | /* wrap to first map page, invert bit 0 */ | |
599 | offset = qpt->incr | ((offset & 1) ^ 1); | |
600 | } | |
501edc42 | 601 | /* there can be no set bits in low-order QoS bits */ |
2abae62a MM |
602 | WARN_ON(rdi->dparms.qos_shift > 1 && |
603 | offset & ((BIT(rdi->dparms.qos_shift - 1) - 1) << 1)); | |
515667f8 DD |
604 | qpn = mk_qpn(qpt, map, offset); |
605 | } | |
606 | ||
607 | ret = -ENOMEM; | |
608 | ||
609 | bail: | |
610 | return ret; | |
611 | } | |
612 | ||
79a225be DD |
613 | /** |
614 | * rvt_clear_mr_refs - Drop help mr refs | |
615 | * @qp: rvt qp data structure | |
616 | * @clr_sends: If shoudl clear send side or not | |
617 | */ | |
618 | static void rvt_clear_mr_refs(struct rvt_qp *qp, int clr_sends) | |
619 | { | |
620 | unsigned n; | |
8b103e9c | 621 | struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device); |
79a225be DD |
622 | |
623 | if (test_and_clear_bit(RVT_R_REWIND_SGE, &qp->r_aflags)) | |
624 | rvt_put_ss(&qp->s_rdma_read_sge); | |
625 | ||
626 | rvt_put_ss(&qp->r_sge); | |
627 | ||
628 | if (clr_sends) { | |
629 | while (qp->s_last != qp->s_head) { | |
630 | struct rvt_swqe *wqe = rvt_get_swqe_ptr(qp, qp->s_last); | |
79a225be | 631 | |
d40f69c9 | 632 | rvt_put_qp_swqe(qp, wqe); |
79a225be DD |
633 | if (++qp->s_last >= qp->s_size) |
634 | qp->s_last = 0; | |
635 | smp_wmb(); /* see qp_set_savail */ | |
636 | } | |
637 | if (qp->s_rdma_mr) { | |
638 | rvt_put_mr(qp->s_rdma_mr); | |
639 | qp->s_rdma_mr = NULL; | |
640 | } | |
641 | } | |
642 | ||
0208da90 | 643 | for (n = 0; qp->s_ack_queue && n < rvt_max_atomic(rdi); n++) { |
79a225be DD |
644 | struct rvt_ack_entry *e = &qp->s_ack_queue[n]; |
645 | ||
fe508272 | 646 | if (e->rdma_sge.mr) { |
79a225be DD |
647 | rvt_put_mr(e->rdma_sge.mr); |
648 | e->rdma_sge.mr = NULL; | |
649 | } | |
650 | } | |
651 | } | |
652 | ||
0208da90 MM |
653 | /** |
654 | * rvt_swqe_has_lkey - return true if lkey is used by swqe | |
655 | * @wqe - the send wqe | |
656 | * @lkey - the lkey | |
657 | * | |
658 | * Test the swqe for using lkey | |
659 | */ | |
660 | static bool rvt_swqe_has_lkey(struct rvt_swqe *wqe, u32 lkey) | |
661 | { | |
662 | int i; | |
663 | ||
664 | for (i = 0; i < wqe->wr.num_sge; i++) { | |
665 | struct rvt_sge *sge = &wqe->sg_list[i]; | |
666 | ||
667 | if (rvt_mr_has_lkey(sge->mr, lkey)) | |
668 | return true; | |
669 | } | |
670 | return false; | |
671 | } | |
672 | ||
673 | /** | |
674 | * rvt_qp_sends_has_lkey - return true is qp sends use lkey | |
675 | * @qp - the rvt_qp | |
676 | * @lkey - the lkey | |
677 | */ | |
678 | static bool rvt_qp_sends_has_lkey(struct rvt_qp *qp, u32 lkey) | |
679 | { | |
680 | u32 s_last = qp->s_last; | |
681 | ||
682 | while (s_last != qp->s_head) { | |
683 | struct rvt_swqe *wqe = rvt_get_swqe_ptr(qp, s_last); | |
684 | ||
685 | if (rvt_swqe_has_lkey(wqe, lkey)) | |
686 | return true; | |
687 | ||
688 | if (++s_last >= qp->s_size) | |
689 | s_last = 0; | |
690 | } | |
691 | if (qp->s_rdma_mr) | |
692 | if (rvt_mr_has_lkey(qp->s_rdma_mr, lkey)) | |
693 | return true; | |
694 | return false; | |
695 | } | |
696 | ||
697 | /** | |
698 | * rvt_qp_acks_has_lkey - return true if acks have lkey | |
699 | * @qp - the qp | |
700 | * @lkey - the lkey | |
701 | */ | |
702 | static bool rvt_qp_acks_has_lkey(struct rvt_qp *qp, u32 lkey) | |
703 | { | |
704 | int i; | |
705 | struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device); | |
706 | ||
707 | for (i = 0; qp->s_ack_queue && i < rvt_max_atomic(rdi); i++) { | |
708 | struct rvt_ack_entry *e = &qp->s_ack_queue[i]; | |
709 | ||
710 | if (rvt_mr_has_lkey(e->rdma_sge.mr, lkey)) | |
711 | return true; | |
712 | } | |
713 | return false; | |
714 | } | |
715 | ||
716 | /* | |
717 | * rvt_qp_mr_clean - clean up remote ops for lkey | |
718 | * @qp - the qp | |
719 | * @lkey - the lkey that is being de-registered | |
720 | * | |
721 | * This routine checks if the lkey is being used by | |
722 | * the qp. | |
723 | * | |
724 | * If so, the qp is put into an error state to elminate | |
725 | * any references from the qp. | |
726 | */ | |
727 | void rvt_qp_mr_clean(struct rvt_qp *qp, u32 lkey) | |
728 | { | |
729 | bool lastwqe = false; | |
730 | ||
731 | if (qp->ibqp.qp_type == IB_QPT_SMI || | |
732 | qp->ibqp.qp_type == IB_QPT_GSI) | |
733 | /* avoid special QPs */ | |
734 | return; | |
735 | spin_lock_irq(&qp->r_lock); | |
736 | spin_lock(&qp->s_hlock); | |
737 | spin_lock(&qp->s_lock); | |
738 | ||
739 | if (qp->state == IB_QPS_ERR || qp->state == IB_QPS_RESET) | |
740 | goto check_lwqe; | |
741 | ||
742 | if (rvt_ss_has_lkey(&qp->r_sge, lkey) || | |
743 | rvt_qp_sends_has_lkey(qp, lkey) || | |
744 | rvt_qp_acks_has_lkey(qp, lkey)) | |
745 | lastwqe = rvt_error_qp(qp, IB_WC_LOC_PROT_ERR); | |
746 | check_lwqe: | |
747 | spin_unlock(&qp->s_lock); | |
748 | spin_unlock(&qp->s_hlock); | |
749 | spin_unlock_irq(&qp->r_lock); | |
750 | if (lastwqe) { | |
751 | struct ib_event ev; | |
752 | ||
753 | ev.device = qp->ibqp.device; | |
754 | ev.element.qp = &qp->ibqp; | |
755 | ev.event = IB_EVENT_QP_LAST_WQE_REACHED; | |
756 | qp->ibqp.event_handler(&ev, qp->ibqp.qp_context); | |
757 | } | |
758 | } | |
759 | ||
79a225be DD |
760 | /** |
761 | * rvt_remove_qp - remove qp form table | |
762 | * @rdi: rvt dev struct | |
763 | * @qp: qp to remove | |
764 | * | |
765 | * Remove the QP from the table so it can't be found asynchronously by | |
766 | * the receive routine. | |
767 | */ | |
768 | static void rvt_remove_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp) | |
769 | { | |
770 | struct rvt_ibport *rvp = rdi->ports[qp->port_num - 1]; | |
771 | u32 n = hash_32(qp->ibqp.qp_num, rdi->qp_dev->qp_table_bits); | |
772 | unsigned long flags; | |
773 | int removed = 1; | |
774 | ||
775 | spin_lock_irqsave(&rdi->qp_dev->qpt_lock, flags); | |
776 | ||
777 | if (rcu_dereference_protected(rvp->qp[0], | |
778 | lockdep_is_held(&rdi->qp_dev->qpt_lock)) == qp) { | |
779 | RCU_INIT_POINTER(rvp->qp[0], NULL); | |
780 | } else if (rcu_dereference_protected(rvp->qp[1], | |
781 | lockdep_is_held(&rdi->qp_dev->qpt_lock)) == qp) { | |
782 | RCU_INIT_POINTER(rvp->qp[1], NULL); | |
783 | } else { | |
784 | struct rvt_qp *q; | |
785 | struct rvt_qp __rcu **qpp; | |
786 | ||
787 | removed = 0; | |
788 | qpp = &rdi->qp_dev->qp_table[n]; | |
789 | for (; (q = rcu_dereference_protected(*qpp, | |
790 | lockdep_is_held(&rdi->qp_dev->qpt_lock))) != NULL; | |
791 | qpp = &q->next) { | |
792 | if (q == qp) { | |
793 | RCU_INIT_POINTER(*qpp, | |
794 | rcu_dereference_protected(qp->next, | |
795 | lockdep_is_held(&rdi->qp_dev->qpt_lock))); | |
796 | removed = 1; | |
797 | trace_rvt_qpremove(qp, n); | |
798 | break; | |
799 | } | |
800 | } | |
801 | } | |
802 | ||
803 | spin_unlock_irqrestore(&rdi->qp_dev->qpt_lock, flags); | |
804 | if (removed) { | |
805 | synchronize_rcu(); | |
4d6f85c3 | 806 | rvt_put_qp(qp); |
79a225be DD |
807 | } |
808 | } | |
809 | ||
dabac6e4 KA |
810 | /** |
811 | * rvt_alloc_rq - allocate memory for user or kernel buffer | |
812 | * @rq: receive queue data structure | |
813 | * @size: number of request queue entries | |
814 | * @node: The NUMA node | |
815 | * @udata: True if user data is available or not false | |
816 | * | |
817 | * Return: If memory allocation failed, return -ENONEM | |
818 | * This function is used by both shared receive | |
819 | * queues and non-shared receive queues to allocate | |
820 | * memory. | |
821 | */ | |
822 | int rvt_alloc_rq(struct rvt_rq *rq, u32 size, int node, | |
823 | struct ib_udata *udata) | |
824 | { | |
825 | if (udata) { | |
826 | rq->wq = vmalloc_user(sizeof(struct rvt_rwq) + size); | |
827 | if (!rq->wq) | |
828 | goto bail; | |
829 | /* need kwq with no buffers */ | |
830 | rq->kwq = kzalloc_node(sizeof(*rq->kwq), GFP_KERNEL, node); | |
831 | if (!rq->kwq) | |
832 | goto bail; | |
833 | rq->kwq->curr_wq = rq->wq->wq; | |
834 | } else { | |
835 | /* need kwq with buffers */ | |
836 | rq->kwq = | |
837 | vzalloc_node(sizeof(struct rvt_krwq) + size, node); | |
838 | if (!rq->kwq) | |
839 | goto bail; | |
840 | rq->kwq->curr_wq = rq->kwq->wq; | |
841 | } | |
842 | ||
f592ae3c KA |
843 | spin_lock_init(&rq->kwq->p_lock); |
844 | spin_lock_init(&rq->kwq->c_lock); | |
dabac6e4 KA |
845 | return 0; |
846 | bail: | |
847 | rvt_free_rq(rq); | |
848 | return -ENOMEM; | |
849 | } | |
850 | ||
515667f8 | 851 | /** |
222f7a9a MM |
852 | * rvt_init_qp - initialize the QP state to the reset state |
853 | * @qp: the QP to init or reinit | |
515667f8 | 854 | * @type: the QP type |
222f7a9a MM |
855 | * |
856 | * This function is called from both rvt_create_qp() and | |
857 | * rvt_reset_qp(). The difference is that the reset | |
858 | * patch the necessary locks to protect against concurent | |
859 | * access. | |
515667f8 | 860 | */ |
222f7a9a MM |
861 | static void rvt_init_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, |
862 | enum ib_qp_type type) | |
515667f8 | 863 | { |
3b0b3fb3 DD |
864 | qp->remote_qpn = 0; |
865 | qp->qkey = 0; | |
866 | qp->qp_access_flags = 0; | |
515667f8 DD |
867 | qp->s_flags &= RVT_S_SIGNAL_REQ_WR; |
868 | qp->s_hdrwords = 0; | |
869 | qp->s_wqe = NULL; | |
870 | qp->s_draining = 0; | |
871 | qp->s_next_psn = 0; | |
872 | qp->s_last_psn = 0; | |
873 | qp->s_sending_psn = 0; | |
874 | qp->s_sending_hpsn = 0; | |
875 | qp->s_psn = 0; | |
876 | qp->r_psn = 0; | |
877 | qp->r_msn = 0; | |
878 | if (type == IB_QPT_RC) { | |
879 | qp->s_state = IB_OPCODE_RC_SEND_LAST; | |
880 | qp->r_state = IB_OPCODE_RC_SEND_LAST; | |
881 | } else { | |
882 | qp->s_state = IB_OPCODE_UC_SEND_LAST; | |
883 | qp->r_state = IB_OPCODE_UC_SEND_LAST; | |
884 | } | |
885 | qp->s_ack_state = IB_OPCODE_RC_ACKNOWLEDGE; | |
886 | qp->r_nak_state = 0; | |
887 | qp->r_aflags = 0; | |
888 | qp->r_flags = 0; | |
889 | qp->s_head = 0; | |
890 | qp->s_tail = 0; | |
891 | qp->s_cur = 0; | |
892 | qp->s_acked = 0; | |
893 | qp->s_last = 0; | |
894 | qp->s_ssn = 1; | |
895 | qp->s_lsn = 0; | |
896 | qp->s_mig_state = IB_MIG_MIGRATED; | |
515667f8 DD |
897 | qp->r_head_ack_queue = 0; |
898 | qp->s_tail_ack_queue = 0; | |
4f9264d1 | 899 | qp->s_acked_ack_queue = 0; |
515667f8 | 900 | qp->s_num_rd_atomic = 0; |
f592ae3c KA |
901 | if (qp->r_rq.kwq) |
902 | qp->r_rq.kwq->count = qp->r_rq.size; | |
515667f8 | 903 | qp->r_sge.num_sge = 0; |
856cc4c2 | 904 | atomic_set(&qp->s_reserved_used, 0); |
515667f8 DD |
905 | } |
906 | ||
222f7a9a | 907 | /** |
f92e4871 | 908 | * _rvt_reset_qp - initialize the QP state to the reset state |
222f7a9a MM |
909 | * @qp: the QP to reset |
910 | * @type: the QP type | |
911 | * | |
912 | * r_lock, s_hlock, and s_lock are required to be held by the caller | |
913 | */ | |
f92e4871 KW |
914 | static void _rvt_reset_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, |
915 | enum ib_qp_type type) | |
222f7a9a MM |
916 | __must_hold(&qp->s_lock) |
917 | __must_hold(&qp->s_hlock) | |
918 | __must_hold(&qp->r_lock) | |
919 | { | |
68e78b3d MM |
920 | lockdep_assert_held(&qp->r_lock); |
921 | lockdep_assert_held(&qp->s_hlock); | |
922 | lockdep_assert_held(&qp->s_lock); | |
222f7a9a MM |
923 | if (qp->state != IB_QPS_RESET) { |
924 | qp->state = IB_QPS_RESET; | |
925 | ||
926 | /* Let drivers flush their waitlist */ | |
927 | rdi->driver_f.flush_qp_waiters(qp); | |
11a10d4b | 928 | rvt_stop_rc_timers(qp); |
222f7a9a MM |
929 | qp->s_flags &= ~(RVT_S_TIMER | RVT_S_ANY_WAIT); |
930 | spin_unlock(&qp->s_lock); | |
931 | spin_unlock(&qp->s_hlock); | |
932 | spin_unlock_irq(&qp->r_lock); | |
933 | ||
934 | /* Stop the send queue and the retry timer */ | |
935 | rdi->driver_f.stop_send_queue(qp); | |
11a10d4b | 936 | rvt_del_timers_sync(qp); |
222f7a9a MM |
937 | /* Wait for things to stop */ |
938 | rdi->driver_f.quiesce_qp(qp); | |
939 | ||
940 | /* take qp out the hash and wait for it to be unused */ | |
941 | rvt_remove_qp(rdi, qp); | |
222f7a9a MM |
942 | |
943 | /* grab the lock b/c it was locked at call time */ | |
944 | spin_lock_irq(&qp->r_lock); | |
945 | spin_lock(&qp->s_hlock); | |
946 | spin_lock(&qp->s_lock); | |
947 | ||
948 | rvt_clear_mr_refs(qp, 1); | |
949 | /* | |
950 | * Let the driver do any tear down or re-init it needs to for | |
951 | * a qp that has been reset | |
952 | */ | |
953 | rdi->driver_f.notify_qp_reset(qp); | |
954 | } | |
955 | rvt_init_qp(rdi, qp, type); | |
68e78b3d MM |
956 | lockdep_assert_held(&qp->r_lock); |
957 | lockdep_assert_held(&qp->s_hlock); | |
958 | lockdep_assert_held(&qp->s_lock); | |
222f7a9a MM |
959 | } |
960 | ||
f92e4871 KW |
961 | /** |
962 | * rvt_reset_qp - initialize the QP state to the reset state | |
963 | * @rdi: the device info | |
964 | * @qp: the QP to reset | |
965 | * @type: the QP type | |
966 | * | |
967 | * This is the wrapper function to acquire the r_lock, s_hlock, and s_lock | |
968 | * before calling _rvt_reset_qp(). | |
969 | */ | |
970 | static void rvt_reset_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, | |
971 | enum ib_qp_type type) | |
972 | { | |
973 | spin_lock_irq(&qp->r_lock); | |
974 | spin_lock(&qp->s_hlock); | |
975 | spin_lock(&qp->s_lock); | |
976 | _rvt_reset_qp(rdi, qp, type); | |
977 | spin_unlock(&qp->s_lock); | |
978 | spin_unlock(&qp->s_hlock); | |
979 | spin_unlock_irq(&qp->r_lock); | |
980 | } | |
981 | ||
b2f8a04e DD |
982 | /** rvt_free_qpn - Free a qpn from the bit map |
983 | * @qpt: QP table | |
984 | * @qpn: queue pair number to free | |
985 | */ | |
986 | static void rvt_free_qpn(struct rvt_qpn_table *qpt, u32 qpn) | |
987 | { | |
988 | struct rvt_qpn_map *map; | |
989 | ||
6c31e528 | 990 | map = qpt->map + (qpn & RVT_QPN_MASK) / RVT_BITS_PER_PAGE; |
b2f8a04e DD |
991 | if (map->page) |
992 | clear_bit(qpn & RVT_BITS_PER_PAGE_MASK, map->page); | |
993 | } | |
994 | ||
fe2ac047 MR |
995 | /** |
996 | * get_allowed_ops - Given a QP type return the appropriate allowed OP | |
997 | * @type: valid, supported, QP type | |
998 | */ | |
999 | static u8 get_allowed_ops(enum ib_qp_type type) | |
1000 | { | |
1001 | return type == IB_QPT_RC ? IB_OPCODE_RC : type == IB_QPT_UC ? | |
1002 | IB_OPCODE_UC : IB_OPCODE_UD; | |
1003 | } | |
1004 | ||
d310c4bf MR |
1005 | /** |
1006 | * free_ud_wq_attr - Clean up AH attribute cache for UD QPs | |
1007 | * @qp: Valid QP with allowed_ops set | |
1008 | * | |
1009 | * The rvt_swqe data structure being used is a union, so this is | |
1010 | * only valid for UD QPs. | |
1011 | */ | |
1012 | static void free_ud_wq_attr(struct rvt_qp *qp) | |
1013 | { | |
1014 | struct rvt_swqe *wqe; | |
1015 | int i; | |
1016 | ||
1017 | for (i = 0; qp->allowed_ops == IB_OPCODE_UD && i < qp->s_size; i++) { | |
1018 | wqe = rvt_get_swqe_ptr(qp, i); | |
1019 | kfree(wqe->ud_wr.attr); | |
1020 | wqe->ud_wr.attr = NULL; | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | /** | |
1025 | * alloc_ud_wq_attr - AH attribute cache for UD QPs | |
1026 | * @qp: Valid QP with allowed_ops set | |
1027 | * @node: Numa node for allocation | |
1028 | * | |
1029 | * The rvt_swqe data structure being used is a union, so this is | |
1030 | * only valid for UD QPs. | |
1031 | */ | |
1032 | static int alloc_ud_wq_attr(struct rvt_qp *qp, int node) | |
1033 | { | |
1034 | struct rvt_swqe *wqe; | |
1035 | int i; | |
1036 | ||
1037 | for (i = 0; qp->allowed_ops == IB_OPCODE_UD && i < qp->s_size; i++) { | |
1038 | wqe = rvt_get_swqe_ptr(qp, i); | |
1039 | wqe->ud_wr.attr = kzalloc_node(sizeof(*wqe->ud_wr.attr), | |
1040 | GFP_KERNEL, node); | |
1041 | if (!wqe->ud_wr.attr) { | |
1042 | free_ud_wq_attr(qp); | |
1043 | return -ENOMEM; | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | return 0; | |
1048 | } | |
1049 | ||
b518d3e6 DD |
1050 | /** |
1051 | * rvt_create_qp - create a queue pair for a device | |
1052 | * @ibpd: the protection domain who's device we create the queue pair for | |
1053 | * @init_attr: the attributes of the queue pair | |
1054 | * @udata: user data for libibverbs.so | |
1055 | * | |
515667f8 DD |
1056 | * Queue pair creation is mostly an rvt issue. However, drivers have their own |
1057 | * unique idea of what queue pair numbers mean. For instance there is a reserved | |
1058 | * range for PSM. | |
1059 | * | |
90793f71 | 1060 | * Return: the queue pair on success, otherwise returns an errno. |
b518d3e6 DD |
1061 | * |
1062 | * Called by the ib_create_qp() core verbs function. | |
1063 | */ | |
1064 | struct ib_qp *rvt_create_qp(struct ib_pd *ibpd, | |
1065 | struct ib_qp_init_attr *init_attr, | |
1066 | struct ib_udata *udata) | |
1067 | { | |
515667f8 DD |
1068 | struct rvt_qp *qp; |
1069 | int err; | |
1070 | struct rvt_swqe *swq = NULL; | |
1071 | size_t sz; | |
1072 | size_t sg_list_sz; | |
1073 | struct ib_qp *ret = ERR_PTR(-ENOMEM); | |
1074 | struct rvt_dev_info *rdi = ib_to_rvt(ibpd->device); | |
1075 | void *priv = NULL; | |
afcf8f76 | 1076 | size_t sqsize; |
515667f8 DD |
1077 | |
1078 | if (!rdi) | |
1079 | return ERR_PTR(-EINVAL); | |
1080 | ||
33023fb8 | 1081 | if (init_attr->cap.max_send_sge > rdi->dparms.props.max_send_sge || |
515667f8 | 1082 | init_attr->cap.max_send_wr > rdi->dparms.props.max_qp_wr || |
0f4d027c | 1083 | init_attr->create_flags) |
515667f8 DD |
1084 | return ERR_PTR(-EINVAL); |
1085 | ||
1086 | /* Check receive queue parameters if no SRQ is specified. */ | |
1087 | if (!init_attr->srq) { | |
33023fb8 SW |
1088 | if (init_attr->cap.max_recv_sge > |
1089 | rdi->dparms.props.max_recv_sge || | |
515667f8 DD |
1090 | init_attr->cap.max_recv_wr > rdi->dparms.props.max_qp_wr) |
1091 | return ERR_PTR(-EINVAL); | |
1092 | ||
1093 | if (init_attr->cap.max_send_sge + | |
1094 | init_attr->cap.max_send_wr + | |
1095 | init_attr->cap.max_recv_sge + | |
1096 | init_attr->cap.max_recv_wr == 0) | |
1097 | return ERR_PTR(-EINVAL); | |
1098 | } | |
afcf8f76 | 1099 | sqsize = |
856cc4c2 MM |
1100 | init_attr->cap.max_send_wr + 1 + |
1101 | rdi->dparms.reserved_operations; | |
515667f8 DD |
1102 | switch (init_attr->qp_type) { |
1103 | case IB_QPT_SMI: | |
1104 | case IB_QPT_GSI: | |
1105 | if (init_attr->port_num == 0 || | |
1106 | init_attr->port_num > ibpd->device->phys_port_cnt) | |
1107 | return ERR_PTR(-EINVAL); | |
2caaa233 | 1108 | /* fall through */ |
515667f8 DD |
1109 | case IB_QPT_UC: |
1110 | case IB_QPT_RC: | |
1111 | case IB_QPT_UD: | |
34755f59 | 1112 | sz = struct_size(swq, sg_list, init_attr->cap.max_send_sge); |
fd7beced | 1113 | swq = vzalloc_node(array_size(sz, sqsize), rdi->dparms.node); |
515667f8 DD |
1114 | if (!swq) |
1115 | return ERR_PTR(-ENOMEM); | |
1116 | ||
1117 | sz = sizeof(*qp); | |
1118 | sg_list_sz = 0; | |
1119 | if (init_attr->srq) { | |
1120 | struct rvt_srq *srq = ibsrq_to_rvtsrq(init_attr->srq); | |
1121 | ||
1122 | if (srq->rq.max_sge > 1) | |
1123 | sg_list_sz = sizeof(*qp->r_sg_list) * | |
1124 | (srq->rq.max_sge - 1); | |
1125 | } else if (init_attr->cap.max_recv_sge > 1) | |
1126 | sg_list_sz = sizeof(*qp->r_sg_list) * | |
1127 | (init_attr->cap.max_recv_sge - 1); | |
0f4d027c LR |
1128 | qp = kzalloc_node(sz + sg_list_sz, GFP_KERNEL, |
1129 | rdi->dparms.node); | |
515667f8 DD |
1130 | if (!qp) |
1131 | goto bail_swq; | |
fe2ac047 | 1132 | qp->allowed_ops = get_allowed_ops(init_attr->qp_type); |
515667f8 DD |
1133 | |
1134 | RCU_INIT_POINTER(qp->next, NULL); | |
8b103e9c MM |
1135 | if (init_attr->qp_type == IB_QPT_RC) { |
1136 | qp->s_ack_queue = | |
590b5b7d KC |
1137 | kcalloc_node(rvt_max_atomic(rdi), |
1138 | sizeof(*qp->s_ack_queue), | |
1139 | GFP_KERNEL, | |
1140 | rdi->dparms.node); | |
8b103e9c MM |
1141 | if (!qp->s_ack_queue) |
1142 | goto bail_qp; | |
1143 | } | |
11a10d4b | 1144 | /* initialize timers needed for rc qp */ |
a2930e5c | 1145 | timer_setup(&qp->s_timer, rvt_rc_timeout, 0); |
11a10d4b VSD |
1146 | hrtimer_init(&qp->s_rnr_timer, CLOCK_MONOTONIC, |
1147 | HRTIMER_MODE_REL); | |
1148 | qp->s_rnr_timer.function = rvt_rc_rnr_retry; | |
515667f8 DD |
1149 | |
1150 | /* | |
1151 | * Driver needs to set up it's private QP structure and do any | |
1152 | * initialization that is needed. | |
1153 | */ | |
0f4d027c | 1154 | priv = rdi->driver_f.qp_priv_alloc(rdi, qp); |
c755f4af MM |
1155 | if (IS_ERR(priv)) { |
1156 | ret = priv; | |
515667f8 | 1157 | goto bail_qp; |
c755f4af | 1158 | } |
515667f8 DD |
1159 | qp->priv = priv; |
1160 | qp->timeout_jiffies = | |
1161 | usecs_to_jiffies((4096UL * (1UL << qp->timeout)) / | |
1162 | 1000UL); | |
1163 | if (init_attr->srq) { | |
1164 | sz = 0; | |
1165 | } else { | |
1166 | qp->r_rq.size = init_attr->cap.max_recv_wr + 1; | |
1167 | qp->r_rq.max_sge = init_attr->cap.max_recv_sge; | |
1168 | sz = (sizeof(struct ib_sge) * qp->r_rq.max_sge) + | |
1169 | sizeof(struct rvt_rwqe); | |
dabac6e4 KA |
1170 | err = rvt_alloc_rq(&qp->r_rq, qp->r_rq.size * sz, |
1171 | rdi->dparms.node, udata); | |
1172 | if (err) { | |
1173 | ret = ERR_PTR(err); | |
515667f8 | 1174 | goto bail_driver_priv; |
dabac6e4 | 1175 | } |
515667f8 DD |
1176 | } |
1177 | ||
1178 | /* | |
1179 | * ib_create_qp() will initialize qp->ibqp | |
1180 | * except for qp->ibqp.qp_num. | |
1181 | */ | |
1182 | spin_lock_init(&qp->r_lock); | |
46a80d62 | 1183 | spin_lock_init(&qp->s_hlock); |
515667f8 | 1184 | spin_lock_init(&qp->s_lock); |
515667f8 | 1185 | atomic_set(&qp->refcount, 0); |
d9f87239 | 1186 | atomic_set(&qp->local_ops_pending, 0); |
515667f8 | 1187 | init_waitqueue_head(&qp->wait); |
515667f8 DD |
1188 | INIT_LIST_HEAD(&qp->rspwait); |
1189 | qp->state = IB_QPS_RESET; | |
1190 | qp->s_wq = swq; | |
afcf8f76 | 1191 | qp->s_size = sqsize; |
46a80d62 | 1192 | qp->s_avail = init_attr->cap.max_send_wr; |
515667f8 DD |
1193 | qp->s_max_sge = init_attr->cap.max_send_sge; |
1194 | if (init_attr->sq_sig_type == IB_SIGNAL_REQ_WR) | |
1195 | qp->s_flags = RVT_S_SIGNAL_REQ_WR; | |
d310c4bf MR |
1196 | err = alloc_ud_wq_attr(qp, rdi->dparms.node); |
1197 | if (err) { | |
1198 | ret = (ERR_PTR(err)); | |
1199 | goto bail_driver_priv; | |
1200 | } | |
515667f8 DD |
1201 | |
1202 | err = alloc_qpn(rdi, &rdi->qp_dev->qpn_table, | |
1203 | init_attr->qp_type, | |
0f4d027c | 1204 | init_attr->port_num); |
515667f8 DD |
1205 | if (err < 0) { |
1206 | ret = ERR_PTR(err); | |
1207 | goto bail_rq_wq; | |
1208 | } | |
1209 | qp->ibqp.qp_num = err; | |
1210 | qp->port_num = init_attr->port_num; | |
222f7a9a | 1211 | rvt_init_qp(rdi, qp, init_attr->qp_type); |
5190f052 MM |
1212 | if (rdi->driver_f.qp_priv_init) { |
1213 | err = rdi->driver_f.qp_priv_init(rdi, qp, init_attr); | |
1214 | if (err) { | |
1215 | ret = ERR_PTR(err); | |
1216 | goto bail_rq_wq; | |
1217 | } | |
1218 | } | |
515667f8 DD |
1219 | break; |
1220 | ||
1221 | default: | |
1222 | /* Don't support raw QPs */ | |
bb8865f4 | 1223 | return ERR_PTR(-EOPNOTSUPP); |
515667f8 DD |
1224 | } |
1225 | ||
1226 | init_attr->cap.max_inline_data = 0; | |
1227 | ||
1228 | /* | |
1229 | * Return the address of the RWQ as the offset to mmap. | |
bfbac097 | 1230 | * See rvt_mmap() for details. |
515667f8 DD |
1231 | */ |
1232 | if (udata && udata->outlen >= sizeof(__u64)) { | |
1233 | if (!qp->r_rq.wq) { | |
1234 | __u64 offset = 0; | |
1235 | ||
1236 | err = ib_copy_to_udata(udata, &offset, | |
1237 | sizeof(offset)); | |
1238 | if (err) { | |
1239 | ret = ERR_PTR(err); | |
1240 | goto bail_qpn; | |
1241 | } | |
1242 | } else { | |
1243 | u32 s = sizeof(struct rvt_rwq) + qp->r_rq.size * sz; | |
1244 | ||
ff23dfa1 | 1245 | qp->ip = rvt_create_mmap_info(rdi, s, udata, |
515667f8 | 1246 | qp->r_rq.wq); |
47c370c1 SM |
1247 | if (IS_ERR(qp->ip)) { |
1248 | ret = ERR_CAST(qp->ip); | |
515667f8 DD |
1249 | goto bail_qpn; |
1250 | } | |
1251 | ||
1252 | err = ib_copy_to_udata(udata, &qp->ip->offset, | |
1253 | sizeof(qp->ip->offset)); | |
1254 | if (err) { | |
1255 | ret = ERR_PTR(err); | |
1256 | goto bail_ip; | |
1257 | } | |
1258 | } | |
ef086c0d | 1259 | qp->pid = current->pid; |
515667f8 DD |
1260 | } |
1261 | ||
1262 | spin_lock(&rdi->n_qps_lock); | |
1263 | if (rdi->n_qps_allocated == rdi->dparms.props.max_qp) { | |
1264 | spin_unlock(&rdi->n_qps_lock); | |
1265 | ret = ERR_PTR(-ENOMEM); | |
1266 | goto bail_ip; | |
1267 | } | |
1268 | ||
1269 | rdi->n_qps_allocated++; | |
bfee5e32 VM |
1270 | /* |
1271 | * Maintain a busy_jiffies variable that will be added to the timeout | |
1272 | * period in mod_retry_timer and add_retry_timer. This busy jiffies | |
1273 | * is scaled by the number of rc qps created for the device to reduce | |
1274 | * the number of timeouts occurring when there is a large number of | |
1275 | * qps. busy_jiffies is incremented every rc qp scaling interval. | |
1276 | * The scaling interval is selected based on extensive performance | |
1277 | * evaluation of targeted workloads. | |
1278 | */ | |
1279 | if (init_attr->qp_type == IB_QPT_RC) { | |
1280 | rdi->n_rc_qps++; | |
1281 | rdi->busy_jiffies = rdi->n_rc_qps / RC_QP_SCALING_INTERVAL; | |
1282 | } | |
515667f8 DD |
1283 | spin_unlock(&rdi->n_qps_lock); |
1284 | ||
1285 | if (qp->ip) { | |
1286 | spin_lock_irq(&rdi->pending_lock); | |
1287 | list_add(&qp->ip->pending_mmaps, &rdi->pending_mmaps); | |
1288 | spin_unlock_irq(&rdi->pending_lock); | |
1289 | } | |
1290 | ||
1291 | ret = &qp->ibqp; | |
1292 | ||
515667f8 DD |
1293 | return ret; |
1294 | ||
1295 | bail_ip: | |
22dccc54 JF |
1296 | if (qp->ip) |
1297 | kref_put(&qp->ip->ref, rvt_release_mmap_info); | |
515667f8 DD |
1298 | |
1299 | bail_qpn: | |
b2f8a04e | 1300 | rvt_free_qpn(&rdi->qp_dev->qpn_table, qp->ibqp.qp_num); |
515667f8 DD |
1301 | |
1302 | bail_rq_wq: | |
dabac6e4 | 1303 | rvt_free_rq(&qp->r_rq); |
d310c4bf | 1304 | free_ud_wq_attr(qp); |
515667f8 DD |
1305 | |
1306 | bail_driver_priv: | |
1307 | rdi->driver_f.qp_priv_free(rdi, qp); | |
1308 | ||
1309 | bail_qp: | |
8b103e9c | 1310 | kfree(qp->s_ack_queue); |
515667f8 DD |
1311 | kfree(qp); |
1312 | ||
1313 | bail_swq: | |
1314 | vfree(swq); | |
1315 | ||
1316 | return ret; | |
b518d3e6 DD |
1317 | } |
1318 | ||
3b0b3fb3 DD |
1319 | /** |
1320 | * rvt_error_qp - put a QP into the error state | |
1321 | * @qp: the QP to put into the error state | |
1322 | * @err: the receive completion error to signal if a RWQE is active | |
1323 | * | |
1324 | * Flushes both send and receive work queues. | |
90793f71 DD |
1325 | * |
1326 | * Return: true if last WQE event should be generated. | |
3b0b3fb3 DD |
1327 | * The QP r_lock and s_lock should be held and interrupts disabled. |
1328 | * If we are already in error state, just return. | |
1329 | */ | |
1330 | int rvt_error_qp(struct rvt_qp *qp, enum ib_wc_status err) | |
1331 | { | |
1332 | struct ib_wc wc; | |
1333 | int ret = 0; | |
1334 | struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device); | |
1335 | ||
68e78b3d MM |
1336 | lockdep_assert_held(&qp->r_lock); |
1337 | lockdep_assert_held(&qp->s_lock); | |
3b0b3fb3 DD |
1338 | if (qp->state == IB_QPS_ERR || qp->state == IB_QPS_RESET) |
1339 | goto bail; | |
1340 | ||
1341 | qp->state = IB_QPS_ERR; | |
1342 | ||
1343 | if (qp->s_flags & (RVT_S_TIMER | RVT_S_WAIT_RNR)) { | |
1344 | qp->s_flags &= ~(RVT_S_TIMER | RVT_S_WAIT_RNR); | |
1345 | del_timer(&qp->s_timer); | |
1346 | } | |
1347 | ||
1348 | if (qp->s_flags & RVT_S_ANY_WAIT_SEND) | |
1349 | qp->s_flags &= ~RVT_S_ANY_WAIT_SEND; | |
1350 | ||
1351 | rdi->driver_f.notify_error_qp(qp); | |
1352 | ||
1353 | /* Schedule the sending tasklet to drain the send work queue. */ | |
6aa7de05 | 1354 | if (READ_ONCE(qp->s_last) != qp->s_head) |
3b0b3fb3 DD |
1355 | rdi->driver_f.schedule_send(qp); |
1356 | ||
1357 | rvt_clear_mr_refs(qp, 0); | |
1358 | ||
1359 | memset(&wc, 0, sizeof(wc)); | |
1360 | wc.qp = &qp->ibqp; | |
1361 | wc.opcode = IB_WC_RECV; | |
1362 | ||
1363 | if (test_and_clear_bit(RVT_R_WRID_VALID, &qp->r_aflags)) { | |
1364 | wc.wr_id = qp->r_wr_id; | |
1365 | wc.status = err; | |
1366 | rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, 1); | |
1367 | } | |
1368 | wc.status = IB_WC_WR_FLUSH_ERR; | |
1369 | ||
dabac6e4 | 1370 | if (qp->r_rq.kwq) { |
3b0b3fb3 DD |
1371 | u32 head; |
1372 | u32 tail; | |
dabac6e4 KA |
1373 | struct rvt_rwq *wq = NULL; |
1374 | struct rvt_krwq *kwq = NULL; | |
3b0b3fb3 | 1375 | |
f592ae3c | 1376 | spin_lock(&qp->r_rq.kwq->c_lock); |
dabac6e4 KA |
1377 | /* qp->ip used to validate if there is a user buffer mmaped */ |
1378 | if (qp->ip) { | |
1379 | wq = qp->r_rq.wq; | |
1380 | head = RDMA_READ_UAPI_ATOMIC(wq->head); | |
1381 | tail = RDMA_READ_UAPI_ATOMIC(wq->tail); | |
1382 | } else { | |
1383 | kwq = qp->r_rq.kwq; | |
1384 | head = kwq->head; | |
1385 | tail = kwq->tail; | |
1386 | } | |
3b0b3fb3 | 1387 | /* sanity check pointers before trusting them */ |
3b0b3fb3 DD |
1388 | if (head >= qp->r_rq.size) |
1389 | head = 0; | |
3b0b3fb3 DD |
1390 | if (tail >= qp->r_rq.size) |
1391 | tail = 0; | |
1392 | while (tail != head) { | |
1393 | wc.wr_id = rvt_get_rwqe_ptr(&qp->r_rq, tail)->wr_id; | |
1394 | if (++tail >= qp->r_rq.size) | |
1395 | tail = 0; | |
1396 | rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, 1); | |
1397 | } | |
dabac6e4 KA |
1398 | if (qp->ip) |
1399 | RDMA_WRITE_UAPI_ATOMIC(wq->tail, tail); | |
1400 | else | |
1401 | kwq->tail = tail; | |
f592ae3c | 1402 | spin_unlock(&qp->r_rq.kwq->c_lock); |
3b0b3fb3 DD |
1403 | } else if (qp->ibqp.event_handler) { |
1404 | ret = 1; | |
1405 | } | |
1406 | ||
1407 | bail: | |
1408 | return ret; | |
1409 | } | |
1410 | EXPORT_SYMBOL(rvt_error_qp); | |
1411 | ||
1412 | /* | |
1413 | * Put the QP into the hash table. | |
1414 | * The hash table holds a reference to the QP. | |
1415 | */ | |
1416 | static void rvt_insert_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp) | |
1417 | { | |
1418 | struct rvt_ibport *rvp = rdi->ports[qp->port_num - 1]; | |
1419 | unsigned long flags; | |
1420 | ||
4d6f85c3 | 1421 | rvt_get_qp(qp); |
3b0b3fb3 DD |
1422 | spin_lock_irqsave(&rdi->qp_dev->qpt_lock, flags); |
1423 | ||
1424 | if (qp->ibqp.qp_num <= 1) { | |
1425 | rcu_assign_pointer(rvp->qp[qp->ibqp.qp_num], qp); | |
1426 | } else { | |
1427 | u32 n = hash_32(qp->ibqp.qp_num, rdi->qp_dev->qp_table_bits); | |
1428 | ||
1429 | qp->next = rdi->qp_dev->qp_table[n]; | |
1430 | rcu_assign_pointer(rdi->qp_dev->qp_table[n], qp); | |
1431 | trace_rvt_qpinsert(qp, n); | |
1432 | } | |
1433 | ||
1434 | spin_unlock_irqrestore(&rdi->qp_dev->qpt_lock, flags); | |
1435 | } | |
1436 | ||
b518d3e6 | 1437 | /** |
61347fa6 | 1438 | * rvt_modify_qp - modify the attributes of a queue pair |
b518d3e6 DD |
1439 | * @ibqp: the queue pair who's attributes we're modifying |
1440 | * @attr: the new attributes | |
1441 | * @attr_mask: the mask of attributes to modify | |
1442 | * @udata: user data for libibverbs.so | |
1443 | * | |
90793f71 | 1444 | * Return: 0 on success, otherwise returns an errno. |
b518d3e6 DD |
1445 | */ |
1446 | int rvt_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, | |
1447 | int attr_mask, struct ib_udata *udata) | |
1448 | { | |
3b0b3fb3 DD |
1449 | struct rvt_dev_info *rdi = ib_to_rvt(ibqp->device); |
1450 | struct rvt_qp *qp = ibqp_to_rvtqp(ibqp); | |
1451 | enum ib_qp_state cur_state, new_state; | |
1452 | struct ib_event ev; | |
1453 | int lastwqe = 0; | |
1454 | int mig = 0; | |
1455 | int pmtu = 0; /* for gcc warning only */ | |
13c19222 | 1456 | int opa_ah; |
3b0b3fb3 | 1457 | |
3b0b3fb3 | 1458 | spin_lock_irq(&qp->r_lock); |
46a80d62 | 1459 | spin_lock(&qp->s_hlock); |
3b0b3fb3 DD |
1460 | spin_lock(&qp->s_lock); |
1461 | ||
1462 | cur_state = attr_mask & IB_QP_CUR_STATE ? | |
1463 | attr->cur_qp_state : qp->state; | |
1464 | new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state; | |
13c19222 | 1465 | opa_ah = rdma_cap_opa_ah(ibqp->device, qp->port_num); |
3b0b3fb3 DD |
1466 | |
1467 | if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, | |
d31131bb | 1468 | attr_mask)) |
3b0b3fb3 DD |
1469 | goto inval; |
1470 | ||
e85ec33d IW |
1471 | if (rdi->driver_f.check_modify_qp && |
1472 | rdi->driver_f.check_modify_qp(qp, attr, attr_mask, udata)) | |
1473 | goto inval; | |
1474 | ||
3b0b3fb3 | 1475 | if (attr_mask & IB_QP_AV) { |
13c19222 DH |
1476 | if (opa_ah) { |
1477 | if (rdma_ah_get_dlid(&attr->ah_attr) >= | |
1478 | opa_get_mcast_base(OPA_MCAST_NR)) | |
1479 | goto inval; | |
1480 | } else { | |
1481 | if (rdma_ah_get_dlid(&attr->ah_attr) >= | |
1482 | be16_to_cpu(IB_MULTICAST_LID_BASE)) | |
1483 | goto inval; | |
1484 | } | |
1485 | ||
3b0b3fb3 DD |
1486 | if (rvt_check_ah(qp->ibqp.device, &attr->ah_attr)) |
1487 | goto inval; | |
1488 | } | |
1489 | ||
1490 | if (attr_mask & IB_QP_ALT_PATH) { | |
13c19222 DH |
1491 | if (opa_ah) { |
1492 | if (rdma_ah_get_dlid(&attr->alt_ah_attr) >= | |
1493 | opa_get_mcast_base(OPA_MCAST_NR)) | |
1494 | goto inval; | |
1495 | } else { | |
1496 | if (rdma_ah_get_dlid(&attr->alt_ah_attr) >= | |
1497 | be16_to_cpu(IB_MULTICAST_LID_BASE)) | |
1498 | goto inval; | |
1499 | } | |
1500 | ||
3b0b3fb3 DD |
1501 | if (rvt_check_ah(qp->ibqp.device, &attr->alt_ah_attr)) |
1502 | goto inval; | |
1503 | if (attr->alt_pkey_index >= rvt_get_npkeys(rdi)) | |
1504 | goto inval; | |
1505 | } | |
1506 | ||
1507 | if (attr_mask & IB_QP_PKEY_INDEX) | |
1508 | if (attr->pkey_index >= rvt_get_npkeys(rdi)) | |
1509 | goto inval; | |
1510 | ||
1511 | if (attr_mask & IB_QP_MIN_RNR_TIMER) | |
1512 | if (attr->min_rnr_timer > 31) | |
1513 | goto inval; | |
1514 | ||
1515 | if (attr_mask & IB_QP_PORT) | |
1516 | if (qp->ibqp.qp_type == IB_QPT_SMI || | |
1517 | qp->ibqp.qp_type == IB_QPT_GSI || | |
1518 | attr->port_num == 0 || | |
1519 | attr->port_num > ibqp->device->phys_port_cnt) | |
1520 | goto inval; | |
1521 | ||
1522 | if (attr_mask & IB_QP_DEST_QPN) | |
1523 | if (attr->dest_qp_num > RVT_QPN_MASK) | |
1524 | goto inval; | |
1525 | ||
1526 | if (attr_mask & IB_QP_RETRY_CNT) | |
1527 | if (attr->retry_cnt > 7) | |
1528 | goto inval; | |
1529 | ||
1530 | if (attr_mask & IB_QP_RNR_RETRY) | |
1531 | if (attr->rnr_retry > 7) | |
1532 | goto inval; | |
1533 | ||
b518d3e6 | 1534 | /* |
3b0b3fb3 DD |
1535 | * Don't allow invalid path_mtu values. OK to set greater |
1536 | * than the active mtu (or even the max_cap, if we have tuned | |
1537 | * that to a small mtu. We'll set qp->path_mtu | |
1538 | * to the lesser of requested attribute mtu and active, | |
1539 | * for packetizing messages. | |
1540 | * Note that the QP port has to be set in INIT and MTU in RTR. | |
b518d3e6 | 1541 | */ |
3b0b3fb3 DD |
1542 | if (attr_mask & IB_QP_PATH_MTU) { |
1543 | pmtu = rdi->driver_f.get_pmtu_from_attr(rdi, qp, attr); | |
1544 | if (pmtu < 0) | |
1545 | goto inval; | |
1546 | } | |
1547 | ||
1548 | if (attr_mask & IB_QP_PATH_MIG_STATE) { | |
1549 | if (attr->path_mig_state == IB_MIG_REARM) { | |
1550 | if (qp->s_mig_state == IB_MIG_ARMED) | |
1551 | goto inval; | |
1552 | if (new_state != IB_QPS_RTS) | |
1553 | goto inval; | |
1554 | } else if (attr->path_mig_state == IB_MIG_MIGRATED) { | |
1555 | if (qp->s_mig_state == IB_MIG_REARM) | |
1556 | goto inval; | |
1557 | if (new_state != IB_QPS_RTS && new_state != IB_QPS_SQD) | |
1558 | goto inval; | |
1559 | if (qp->s_mig_state == IB_MIG_ARMED) | |
1560 | mig = 1; | |
1561 | } else { | |
1562 | goto inval; | |
1563 | } | |
1564 | } | |
1565 | ||
1566 | if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) | |
1567 | if (attr->max_dest_rd_atomic > rdi->dparms.max_rdma_atomic) | |
1568 | goto inval; | |
1569 | ||
1570 | switch (new_state) { | |
1571 | case IB_QPS_RESET: | |
1572 | if (qp->state != IB_QPS_RESET) | |
f92e4871 | 1573 | _rvt_reset_qp(rdi, qp, ibqp->qp_type); |
3b0b3fb3 DD |
1574 | break; |
1575 | ||
1576 | case IB_QPS_RTR: | |
1577 | /* Allow event to re-trigger if QP set to RTR more than once */ | |
1578 | qp->r_flags &= ~RVT_R_COMM_EST; | |
1579 | qp->state = new_state; | |
1580 | break; | |
1581 | ||
1582 | case IB_QPS_SQD: | |
1583 | qp->s_draining = qp->s_last != qp->s_cur; | |
1584 | qp->state = new_state; | |
1585 | break; | |
1586 | ||
1587 | case IB_QPS_SQE: | |
1588 | if (qp->ibqp.qp_type == IB_QPT_RC) | |
1589 | goto inval; | |
1590 | qp->state = new_state; | |
1591 | break; | |
1592 | ||
1593 | case IB_QPS_ERR: | |
1594 | lastwqe = rvt_error_qp(qp, IB_WC_WR_FLUSH_ERR); | |
1595 | break; | |
1596 | ||
1597 | default: | |
1598 | qp->state = new_state; | |
1599 | break; | |
1600 | } | |
1601 | ||
1602 | if (attr_mask & IB_QP_PKEY_INDEX) | |
1603 | qp->s_pkey_index = attr->pkey_index; | |
1604 | ||
1605 | if (attr_mask & IB_QP_PORT) | |
1606 | qp->port_num = attr->port_num; | |
1607 | ||
1608 | if (attr_mask & IB_QP_DEST_QPN) | |
1609 | qp->remote_qpn = attr->dest_qp_num; | |
1610 | ||
1611 | if (attr_mask & IB_QP_SQ_PSN) { | |
1612 | qp->s_next_psn = attr->sq_psn & rdi->dparms.psn_modify_mask; | |
1613 | qp->s_psn = qp->s_next_psn; | |
1614 | qp->s_sending_psn = qp->s_next_psn; | |
1615 | qp->s_last_psn = qp->s_next_psn - 1; | |
1616 | qp->s_sending_hpsn = qp->s_last_psn; | |
1617 | } | |
1618 | ||
1619 | if (attr_mask & IB_QP_RQ_PSN) | |
1620 | qp->r_psn = attr->rq_psn & rdi->dparms.psn_modify_mask; | |
1621 | ||
1622 | if (attr_mask & IB_QP_ACCESS_FLAGS) | |
1623 | qp->qp_access_flags = attr->qp_access_flags; | |
1624 | ||
1625 | if (attr_mask & IB_QP_AV) { | |
d97099fe | 1626 | rdma_replace_ah_attr(&qp->remote_ah_attr, &attr->ah_attr); |
d8966fcd | 1627 | qp->s_srate = rdma_ah_get_static_rate(&attr->ah_attr); |
3b0b3fb3 DD |
1628 | qp->srate_mbps = ib_rate_to_mbps(qp->s_srate); |
1629 | } | |
1630 | ||
1631 | if (attr_mask & IB_QP_ALT_PATH) { | |
d97099fe | 1632 | rdma_replace_ah_attr(&qp->alt_ah_attr, &attr->alt_ah_attr); |
3b0b3fb3 DD |
1633 | qp->s_alt_pkey_index = attr->alt_pkey_index; |
1634 | } | |
1635 | ||
1636 | if (attr_mask & IB_QP_PATH_MIG_STATE) { | |
1637 | qp->s_mig_state = attr->path_mig_state; | |
1638 | if (mig) { | |
1639 | qp->remote_ah_attr = qp->alt_ah_attr; | |
d8966fcd | 1640 | qp->port_num = rdma_ah_get_port_num(&qp->alt_ah_attr); |
3b0b3fb3 | 1641 | qp->s_pkey_index = qp->s_alt_pkey_index; |
3b0b3fb3 DD |
1642 | } |
1643 | } | |
1644 | ||
1645 | if (attr_mask & IB_QP_PATH_MTU) { | |
1646 | qp->pmtu = rdi->driver_f.mtu_from_qp(rdi, qp, pmtu); | |
46a80d62 | 1647 | qp->log_pmtu = ilog2(qp->pmtu); |
3b0b3fb3 DD |
1648 | } |
1649 | ||
1650 | if (attr_mask & IB_QP_RETRY_CNT) { | |
1651 | qp->s_retry_cnt = attr->retry_cnt; | |
1652 | qp->s_retry = attr->retry_cnt; | |
1653 | } | |
1654 | ||
1655 | if (attr_mask & IB_QP_RNR_RETRY) { | |
1656 | qp->s_rnr_retry_cnt = attr->rnr_retry; | |
1657 | qp->s_rnr_retry = attr->rnr_retry; | |
1658 | } | |
1659 | ||
1660 | if (attr_mask & IB_QP_MIN_RNR_TIMER) | |
1661 | qp->r_min_rnr_timer = attr->min_rnr_timer; | |
1662 | ||
1663 | if (attr_mask & IB_QP_TIMEOUT) { | |
1664 | qp->timeout = attr->timeout; | |
a25ce427 | 1665 | qp->timeout_jiffies = rvt_timeout_to_jiffies(qp->timeout); |
3b0b3fb3 DD |
1666 | } |
1667 | ||
1668 | if (attr_mask & IB_QP_QKEY) | |
1669 | qp->qkey = attr->qkey; | |
1670 | ||
1671 | if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) | |
1672 | qp->r_max_rd_atomic = attr->max_dest_rd_atomic; | |
1673 | ||
1674 | if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) | |
1675 | qp->s_max_rd_atomic = attr->max_rd_atomic; | |
1676 | ||
e85ec33d IW |
1677 | if (rdi->driver_f.modify_qp) |
1678 | rdi->driver_f.modify_qp(qp, attr, attr_mask, udata); | |
1679 | ||
3b0b3fb3 | 1680 | spin_unlock(&qp->s_lock); |
46a80d62 | 1681 | spin_unlock(&qp->s_hlock); |
3b0b3fb3 DD |
1682 | spin_unlock_irq(&qp->r_lock); |
1683 | ||
1684 | if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) | |
1685 | rvt_insert_qp(rdi, qp); | |
1686 | ||
1687 | if (lastwqe) { | |
1688 | ev.device = qp->ibqp.device; | |
1689 | ev.element.qp = &qp->ibqp; | |
1690 | ev.event = IB_EVENT_QP_LAST_WQE_REACHED; | |
1691 | qp->ibqp.event_handler(&ev, qp->ibqp.qp_context); | |
1692 | } | |
1693 | if (mig) { | |
1694 | ev.device = qp->ibqp.device; | |
1695 | ev.element.qp = &qp->ibqp; | |
1696 | ev.event = IB_EVENT_PATH_MIG; | |
1697 | qp->ibqp.event_handler(&ev, qp->ibqp.qp_context); | |
1698 | } | |
1699 | return 0; | |
1700 | ||
1701 | inval: | |
1702 | spin_unlock(&qp->s_lock); | |
46a80d62 | 1703 | spin_unlock(&qp->s_hlock); |
3b0b3fb3 DD |
1704 | spin_unlock_irq(&qp->r_lock); |
1705 | return -EINVAL; | |
b518d3e6 DD |
1706 | } |
1707 | ||
1708 | /** | |
1709 | * rvt_destroy_qp - destroy a queue pair | |
1710 | * @ibqp: the queue pair to destroy | |
1711 | * | |
b518d3e6 DD |
1712 | * Note that this can be called while the QP is actively sending or |
1713 | * receiving! | |
90793f71 DD |
1714 | * |
1715 | * Return: 0 on success. | |
b518d3e6 | 1716 | */ |
c4367a26 | 1717 | int rvt_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata) |
b518d3e6 | 1718 | { |
5a17ad11 DD |
1719 | struct rvt_qp *qp = ibqp_to_rvtqp(ibqp); |
1720 | struct rvt_dev_info *rdi = ib_to_rvt(ibqp->device); | |
b518d3e6 | 1721 | |
5a17ad11 | 1722 | rvt_reset_qp(rdi, qp, ibqp->qp_type); |
5a17ad11 | 1723 | |
f9586abf | 1724 | wait_event(qp->wait, !atomic_read(&qp->refcount)); |
5a17ad11 DD |
1725 | /* qpn is now available for use again */ |
1726 | rvt_free_qpn(&rdi->qp_dev->qpn_table, qp->ibqp.qp_num); | |
1727 | ||
1728 | spin_lock(&rdi->n_qps_lock); | |
1729 | rdi->n_qps_allocated--; | |
bfee5e32 VM |
1730 | if (qp->ibqp.qp_type == IB_QPT_RC) { |
1731 | rdi->n_rc_qps--; | |
1732 | rdi->busy_jiffies = rdi->n_rc_qps / RC_QP_SCALING_INTERVAL; | |
1733 | } | |
5a17ad11 DD |
1734 | spin_unlock(&rdi->n_qps_lock); |
1735 | ||
1736 | if (qp->ip) | |
1737 | kref_put(&qp->ip->ref, rvt_release_mmap_info); | |
dabac6e4 | 1738 | kvfree(qp->r_rq.kwq); |
5a17ad11 | 1739 | rdi->driver_f.qp_priv_free(rdi, qp); |
8b103e9c | 1740 | kfree(qp->s_ack_queue); |
d97099fe JG |
1741 | rdma_destroy_ah_attr(&qp->remote_ah_attr); |
1742 | rdma_destroy_ah_attr(&qp->alt_ah_attr); | |
d310c4bf | 1743 | free_ud_wq_attr(qp); |
838b6fd2 | 1744 | vfree(qp->s_wq); |
5a17ad11 DD |
1745 | kfree(qp); |
1746 | return 0; | |
b518d3e6 DD |
1747 | } |
1748 | ||
90793f71 DD |
1749 | /** |
1750 | * rvt_query_qp - query an ipbq | |
1751 | * @ibqp: IB qp to query | |
1752 | * @attr: attr struct to fill in | |
1753 | * @attr_mask: attr mask ignored | |
1754 | * @init_attr: struct to fill in | |
1755 | * | |
1756 | * Return: always 0 | |
1757 | */ | |
b518d3e6 DD |
1758 | int rvt_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, |
1759 | int attr_mask, struct ib_qp_init_attr *init_attr) | |
1760 | { | |
74d2d500 HC |
1761 | struct rvt_qp *qp = ibqp_to_rvtqp(ibqp); |
1762 | struct rvt_dev_info *rdi = ib_to_rvt(ibqp->device); | |
1763 | ||
1764 | attr->qp_state = qp->state; | |
1765 | attr->cur_qp_state = attr->qp_state; | |
16570d3d | 1766 | attr->path_mtu = rdi->driver_f.mtu_to_path_mtu(qp->pmtu); |
74d2d500 HC |
1767 | attr->path_mig_state = qp->s_mig_state; |
1768 | attr->qkey = qp->qkey; | |
1769 | attr->rq_psn = qp->r_psn & rdi->dparms.psn_mask; | |
1770 | attr->sq_psn = qp->s_next_psn & rdi->dparms.psn_mask; | |
1771 | attr->dest_qp_num = qp->remote_qpn; | |
1772 | attr->qp_access_flags = qp->qp_access_flags; | |
856cc4c2 MM |
1773 | attr->cap.max_send_wr = qp->s_size - 1 - |
1774 | rdi->dparms.reserved_operations; | |
74d2d500 HC |
1775 | attr->cap.max_recv_wr = qp->ibqp.srq ? 0 : qp->r_rq.size - 1; |
1776 | attr->cap.max_send_sge = qp->s_max_sge; | |
1777 | attr->cap.max_recv_sge = qp->r_rq.max_sge; | |
1778 | attr->cap.max_inline_data = 0; | |
1779 | attr->ah_attr = qp->remote_ah_attr; | |
1780 | attr->alt_ah_attr = qp->alt_ah_attr; | |
1781 | attr->pkey_index = qp->s_pkey_index; | |
1782 | attr->alt_pkey_index = qp->s_alt_pkey_index; | |
1783 | attr->en_sqd_async_notify = 0; | |
1784 | attr->sq_draining = qp->s_draining; | |
1785 | attr->max_rd_atomic = qp->s_max_rd_atomic; | |
1786 | attr->max_dest_rd_atomic = qp->r_max_rd_atomic; | |
1787 | attr->min_rnr_timer = qp->r_min_rnr_timer; | |
1788 | attr->port_num = qp->port_num; | |
1789 | attr->timeout = qp->timeout; | |
1790 | attr->retry_cnt = qp->s_retry_cnt; | |
1791 | attr->rnr_retry = qp->s_rnr_retry_cnt; | |
d8966fcd DC |
1792 | attr->alt_port_num = |
1793 | rdma_ah_get_port_num(&qp->alt_ah_attr); | |
74d2d500 HC |
1794 | attr->alt_timeout = qp->alt_timeout; |
1795 | ||
1796 | init_attr->event_handler = qp->ibqp.event_handler; | |
1797 | init_attr->qp_context = qp->ibqp.qp_context; | |
1798 | init_attr->send_cq = qp->ibqp.send_cq; | |
1799 | init_attr->recv_cq = qp->ibqp.recv_cq; | |
1800 | init_attr->srq = qp->ibqp.srq; | |
1801 | init_attr->cap = attr->cap; | |
1802 | if (qp->s_flags & RVT_S_SIGNAL_REQ_WR) | |
1803 | init_attr->sq_sig_type = IB_SIGNAL_REQ_WR; | |
1804 | else | |
1805 | init_attr->sq_sig_type = IB_SIGNAL_ALL_WR; | |
1806 | init_attr->qp_type = qp->ibqp.qp_type; | |
1807 | init_attr->port_num = qp->port_num; | |
1808 | return 0; | |
b518d3e6 | 1809 | } |
8cf4020b DD |
1810 | |
1811 | /** | |
1812 | * rvt_post_receive - post a receive on a QP | |
1813 | * @ibqp: the QP to post the receive on | |
1814 | * @wr: the WR to post | |
1815 | * @bad_wr: the first bad WR is put here | |
1816 | * | |
1817 | * This may be called from interrupt context. | |
90793f71 DD |
1818 | * |
1819 | * Return: 0 on success otherwise errno | |
8cf4020b | 1820 | */ |
d34ac5cd BVA |
1821 | int rvt_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, |
1822 | const struct ib_recv_wr **bad_wr) | |
8cf4020b | 1823 | { |
120bdafa | 1824 | struct rvt_qp *qp = ibqp_to_rvtqp(ibqp); |
dabac6e4 | 1825 | struct rvt_krwq *wq = qp->r_rq.kwq; |
120bdafa | 1826 | unsigned long flags; |
000a830e AE |
1827 | int qp_err_flush = (ib_rvt_state_ops[qp->state] & RVT_FLUSH_RECV) && |
1828 | !qp->ibqp.srq; | |
8cf4020b | 1829 | |
120bdafa DD |
1830 | /* Check that state is OK to post receive. */ |
1831 | if (!(ib_rvt_state_ops[qp->state] & RVT_POST_RECV_OK) || !wq) { | |
1832 | *bad_wr = wr; | |
1833 | return -EINVAL; | |
1834 | } | |
1835 | ||
1836 | for (; wr; wr = wr->next) { | |
1837 | struct rvt_rwqe *wqe; | |
1838 | u32 next; | |
1839 | int i; | |
1840 | ||
1841 | if ((unsigned)wr->num_sge > qp->r_rq.max_sge) { | |
1842 | *bad_wr = wr; | |
1843 | return -EINVAL; | |
1844 | } | |
1845 | ||
f592ae3c | 1846 | spin_lock_irqsave(&qp->r_rq.kwq->p_lock, flags); |
120bdafa DD |
1847 | next = wq->head + 1; |
1848 | if (next >= qp->r_rq.size) | |
1849 | next = 0; | |
dabac6e4 | 1850 | if (next == READ_ONCE(wq->tail)) { |
f592ae3c | 1851 | spin_unlock_irqrestore(&qp->r_rq.kwq->p_lock, flags); |
120bdafa DD |
1852 | *bad_wr = wr; |
1853 | return -ENOMEM; | |
1854 | } | |
000a830e AE |
1855 | if (unlikely(qp_err_flush)) { |
1856 | struct ib_wc wc; | |
1857 | ||
1858 | memset(&wc, 0, sizeof(wc)); | |
1859 | wc.qp = &qp->ibqp; | |
1860 | wc.opcode = IB_WC_RECV; | |
1861 | wc.wr_id = wr->wr_id; | |
1862 | wc.status = IB_WC_WR_FLUSH_ERR; | |
1863 | rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, 1); | |
1864 | } else { | |
1865 | wqe = rvt_get_rwqe_ptr(&qp->r_rq, wq->head); | |
1866 | wqe->wr_id = wr->wr_id; | |
1867 | wqe->num_sge = wr->num_sge; | |
f10ff380 JG |
1868 | for (i = 0; i < wr->num_sge; i++) { |
1869 | wqe->sg_list[i].addr = wr->sg_list[i].addr; | |
1870 | wqe->sg_list[i].length = wr->sg_list[i].length; | |
1871 | wqe->sg_list[i].lkey = wr->sg_list[i].lkey; | |
1872 | } | |
000a830e AE |
1873 | /* |
1874 | * Make sure queue entry is written | |
1875 | * before the head index. | |
1876 | */ | |
dabac6e4 | 1877 | smp_store_release(&wq->head, next); |
000a830e | 1878 | } |
f592ae3c | 1879 | spin_unlock_irqrestore(&qp->r_rq.kwq->p_lock, flags); |
120bdafa DD |
1880 | } |
1881 | return 0; | |
8cf4020b DD |
1882 | } |
1883 | ||
46a80d62 | 1884 | /** |
afcf8f76 MM |
1885 | * rvt_qp_valid_operation - validate post send wr request |
1886 | * @qp - the qp | |
1887 | * @post-parms - the post send table for the driver | |
1888 | * @wr - the work request | |
46a80d62 | 1889 | * |
afcf8f76 MM |
1890 | * The routine validates the operation based on the |
1891 | * validation table an returns the length of the operation | |
1892 | * which can extend beyond the ib_send_bw. Operation | |
1893 | * dependent flags key atomic operation validation. | |
1894 | * | |
1895 | * There is an exception for UD qps that validates the pd and | |
1896 | * overrides the length to include the additional UD specific | |
1897 | * length. | |
1898 | * | |
1899 | * Returns a negative error or the length of the work request | |
1900 | * for building the swqe. | |
1901 | */ | |
1902 | static inline int rvt_qp_valid_operation( | |
1903 | struct rvt_qp *qp, | |
1904 | const struct rvt_operation_params *post_parms, | |
f696bf6d | 1905 | const struct ib_send_wr *wr) |
afcf8f76 MM |
1906 | { |
1907 | int len; | |
1908 | ||
1909 | if (wr->opcode >= RVT_OPERATION_MAX || !post_parms[wr->opcode].length) | |
1910 | return -EINVAL; | |
1911 | if (!(post_parms[wr->opcode].qpt_support & BIT(qp->ibqp.qp_type))) | |
1912 | return -EINVAL; | |
1913 | if ((post_parms[wr->opcode].flags & RVT_OPERATION_PRIV) && | |
1914 | ibpd_to_rvtpd(qp->ibqp.pd)->user) | |
1915 | return -EINVAL; | |
1916 | if (post_parms[wr->opcode].flags & RVT_OPERATION_ATOMIC_SGE && | |
1917 | (wr->num_sge == 0 || | |
1918 | wr->sg_list[0].length < sizeof(u64) || | |
1919 | wr->sg_list[0].addr & (sizeof(u64) - 1))) | |
1920 | return -EINVAL; | |
1921 | if (post_parms[wr->opcode].flags & RVT_OPERATION_ATOMIC && | |
1922 | !qp->s_max_rd_atomic) | |
1923 | return -EINVAL; | |
1924 | len = post_parms[wr->opcode].length; | |
1925 | /* UD specific */ | |
1926 | if (qp->ibqp.qp_type != IB_QPT_UC && | |
1927 | qp->ibqp.qp_type != IB_QPT_RC) { | |
1928 | if (qp->ibqp.pd != ud_wr(wr)->ah->pd) | |
1929 | return -EINVAL; | |
1930 | len = sizeof(struct ib_ud_wr); | |
1931 | } | |
1932 | return len; | |
1933 | } | |
1934 | ||
1935 | /** | |
856cc4c2 | 1936 | * rvt_qp_is_avail - determine queue capacity |
4f9a3018 RD |
1937 | * @qp: the qp |
1938 | * @rdi: the rdmavt device | |
1939 | * @reserved_op: is reserved operation | |
46a80d62 MM |
1940 | * |
1941 | * This assumes the s_hlock is held but the s_last | |
1942 | * qp variable is uncontrolled. | |
afcf8f76 | 1943 | * |
856cc4c2 MM |
1944 | * For non reserved operations, the qp->s_avail |
1945 | * may be changed. | |
1946 | * | |
1947 | * The return value is zero or a -ENOMEM. | |
46a80d62 | 1948 | */ |
856cc4c2 MM |
1949 | static inline int rvt_qp_is_avail( |
1950 | struct rvt_qp *qp, | |
1951 | struct rvt_dev_info *rdi, | |
1952 | bool reserved_op) | |
46a80d62 MM |
1953 | { |
1954 | u32 slast; | |
856cc4c2 MM |
1955 | u32 avail; |
1956 | u32 reserved_used; | |
1957 | ||
1958 | /* see rvt_qp_wqe_unreserve() */ | |
1959 | smp_mb__before_atomic(); | |
856cc4c2 MM |
1960 | if (unlikely(reserved_op)) { |
1961 | /* see rvt_qp_wqe_unreserve() */ | |
4a9ceb7d | 1962 | reserved_used = atomic_read(&qp->s_reserved_used); |
856cc4c2 MM |
1963 | if (reserved_used >= rdi->dparms.reserved_operations) |
1964 | return -ENOMEM; | |
1965 | return 0; | |
1966 | } | |
1967 | /* non-reserved operations */ | |
1968 | if (likely(qp->s_avail)) | |
1969 | return 0; | |
4a9ceb7d MM |
1970 | /* See rvt_qp_complete_swqe() */ |
1971 | slast = smp_load_acquire(&qp->s_last); | |
46a80d62 | 1972 | if (qp->s_head >= slast) |
856cc4c2 | 1973 | avail = qp->s_size - (qp->s_head - slast); |
46a80d62 | 1974 | else |
856cc4c2 MM |
1975 | avail = slast - qp->s_head; |
1976 | ||
856cc4c2 MM |
1977 | reserved_used = atomic_read(&qp->s_reserved_used); |
1978 | avail = avail - 1 - | |
1979 | (rdi->dparms.reserved_operations - reserved_used); | |
1980 | /* insure we don't assign a negative s_avail */ | |
1981 | if ((s32)avail <= 0) | |
1982 | return -ENOMEM; | |
1983 | qp->s_avail = avail; | |
1984 | if (WARN_ON(qp->s_avail > | |
1985 | (qp->s_size - 1 - rdi->dparms.reserved_operations))) | |
1986 | rvt_pr_err(rdi, | |
1987 | "More avail entries than QP RB size.\nQP: %u, size: %u, avail: %u\nhead: %u, tail: %u, cur: %u, acked: %u, last: %u", | |
1988 | qp->ibqp.qp_num, qp->s_size, qp->s_avail, | |
1989 | qp->s_head, qp->s_tail, qp->s_cur, | |
1990 | qp->s_acked, qp->s_last); | |
1991 | return 0; | |
46a80d62 MM |
1992 | } |
1993 | ||
bfbac097 DD |
1994 | /** |
1995 | * rvt_post_one_wr - post one RC, UC, or UD send work request | |
1996 | * @qp: the QP to post on | |
1997 | * @wr: the work request to send | |
1998 | */ | |
91702b4a | 1999 | static int rvt_post_one_wr(struct rvt_qp *qp, |
f696bf6d | 2000 | const struct ib_send_wr *wr, |
0b79b277 | 2001 | bool *call_send) |
bfbac097 DD |
2002 | { |
2003 | struct rvt_swqe *wqe; | |
2004 | u32 next; | |
2005 | int i; | |
2006 | int j; | |
2007 | int acc; | |
2008 | struct rvt_lkey_table *rkt; | |
2009 | struct rvt_pd *pd; | |
2010 | struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device); | |
46a80d62 | 2011 | u8 log_pmtu; |
3ffea7d8 | 2012 | int ret; |
2821c509 | 2013 | size_t cplen; |
856cc4c2 | 2014 | bool reserved_op; |
d9b13c20 | 2015 | int local_ops_delayed = 0; |
bfbac097 | 2016 | |
afcf8f76 MM |
2017 | BUILD_BUG_ON(IB_QPT_MAX >= (sizeof(u32) * BITS_PER_BYTE)); |
2018 | ||
bfbac097 DD |
2019 | /* IB spec says that num_sge == 0 is OK. */ |
2020 | if (unlikely(wr->num_sge > qp->s_max_sge)) | |
2021 | return -EINVAL; | |
2022 | ||
2821c509 MM |
2023 | ret = rvt_qp_valid_operation(qp, rdi->post_parms, wr); |
2024 | if (ret < 0) | |
2025 | return ret; | |
2026 | cplen = ret; | |
2027 | ||
d9f87239 | 2028 | /* |
d9b13c20 JX |
2029 | * Local operations include fast register and local invalidate. |
2030 | * Fast register needs to be processed immediately because the | |
2031 | * registered lkey may be used by following work requests and the | |
2032 | * lkey needs to be valid at the time those requests are posted. | |
2033 | * Local invalidate can be processed immediately if fencing is | |
2034 | * not required and no previous local invalidate ops are pending. | |
2035 | * Signaled local operations that have been processed immediately | |
2036 | * need to have requests with "completion only" flags set posted | |
2037 | * to the send queue in order to generate completions. | |
d9f87239 | 2038 | */ |
d9b13c20 | 2039 | if ((rdi->post_parms[wr->opcode].flags & RVT_OPERATION_LOCAL)) { |
d9f87239 JX |
2040 | switch (wr->opcode) { |
2041 | case IB_WR_REG_MR: | |
d9b13c20 JX |
2042 | ret = rvt_fast_reg_mr(qp, |
2043 | reg_wr(wr)->mr, | |
2044 | reg_wr(wr)->key, | |
2045 | reg_wr(wr)->access); | |
2046 | if (ret || !(wr->send_flags & IB_SEND_SIGNALED)) | |
2047 | return ret; | |
2048 | break; | |
d9f87239 | 2049 | case IB_WR_LOCAL_INV: |
d9b13c20 JX |
2050 | if ((wr->send_flags & IB_SEND_FENCE) || |
2051 | atomic_read(&qp->local_ops_pending)) { | |
2052 | local_ops_delayed = 1; | |
2053 | } else { | |
2054 | ret = rvt_invalidate_rkey( | |
2055 | qp, wr->ex.invalidate_rkey); | |
2056 | if (ret || !(wr->send_flags & IB_SEND_SIGNALED)) | |
2057 | return ret; | |
2058 | } | |
2059 | break; | |
d9f87239 JX |
2060 | default: |
2061 | return -EINVAL; | |
2062 | } | |
2063 | } | |
2064 | ||
856cc4c2 MM |
2065 | reserved_op = rdi->post_parms[wr->opcode].flags & |
2066 | RVT_OPERATION_USE_RESERVE; | |
46a80d62 | 2067 | /* check for avail */ |
856cc4c2 MM |
2068 | ret = rvt_qp_is_avail(qp, rdi, reserved_op); |
2069 | if (ret) | |
2070 | return ret; | |
bfbac097 DD |
2071 | next = qp->s_head + 1; |
2072 | if (next >= qp->s_size) | |
2073 | next = 0; | |
60c30f57 | 2074 | |
bfbac097 DD |
2075 | rkt = &rdi->lkey_table; |
2076 | pd = ibpd_to_rvtpd(qp->ibqp.pd); | |
2077 | wqe = rvt_get_swqe_ptr(qp, qp->s_head); | |
2078 | ||
2821c509 MM |
2079 | /* cplen has length from above */ |
2080 | memcpy(&wqe->wr, wr, cplen); | |
bfbac097 DD |
2081 | |
2082 | wqe->length = 0; | |
2083 | j = 0; | |
2084 | if (wr->num_sge) { | |
14fe13fc MM |
2085 | struct rvt_sge *last_sge = NULL; |
2086 | ||
bfbac097 DD |
2087 | acc = wr->opcode >= IB_WR_RDMA_READ ? |
2088 | IB_ACCESS_LOCAL_WRITE : 0; | |
2089 | for (i = 0; i < wr->num_sge; i++) { | |
2090 | u32 length = wr->sg_list[i].length; | |
bfbac097 DD |
2091 | |
2092 | if (length == 0) | |
2093 | continue; | |
3ffea7d8 MM |
2094 | ret = rvt_lkey_ok(rkt, pd, &wqe->sg_list[j], last_sge, |
2095 | &wr->sg_list[i], acc); | |
2096 | if (unlikely(ret < 0)) | |
2097 | goto bail_inval_free; | |
bfbac097 | 2098 | wqe->length += length; |
3ffea7d8 | 2099 | if (ret) |
14fe13fc | 2100 | last_sge = &wqe->sg_list[j]; |
3ffea7d8 | 2101 | j += ret; |
bfbac097 DD |
2102 | } |
2103 | wqe->wr.num_sge = j; | |
2104 | } | |
46a80d62 | 2105 | |
d205a06a KW |
2106 | /* |
2107 | * Calculate and set SWQE PSN values prior to handing it off | |
2108 | * to the driver's check routine. This give the driver the | |
2109 | * opportunity to adjust PSN values based on internal checks. | |
2110 | */ | |
46a80d62 | 2111 | log_pmtu = qp->log_pmtu; |
52cdbcc2 | 2112 | if (qp->allowed_ops == IB_OPCODE_UD) { |
2b0ad2da | 2113 | struct rvt_ah *ah = rvt_get_swqe_ah(wqe); |
46a80d62 MM |
2114 | |
2115 | log_pmtu = ah->log_pmtu; | |
d310c4bf | 2116 | rdma_copy_ah_attr(wqe->ud_wr.attr, &ah->attr); |
bfbac097 | 2117 | } |
46a80d62 | 2118 | |
d9f87239 | 2119 | if (rdi->post_parms[wr->opcode].flags & RVT_OPERATION_LOCAL) { |
d9b13c20 JX |
2120 | if (local_ops_delayed) |
2121 | atomic_inc(&qp->local_ops_pending); | |
2122 | else | |
2123 | wqe->wr.send_flags |= RVT_SEND_COMPLETION_ONLY; | |
d9f87239 JX |
2124 | wqe->ssn = 0; |
2125 | wqe->psn = 0; | |
2126 | wqe->lpsn = 0; | |
2127 | } else { | |
2128 | wqe->ssn = qp->s_ssn++; | |
2129 | wqe->psn = qp->s_next_psn; | |
2130 | wqe->lpsn = wqe->psn + | |
2131 | (wqe->length ? | |
2132 | ((wqe->length - 1) >> log_pmtu) : | |
2133 | 0); | |
d9f87239 | 2134 | } |
d205a06a KW |
2135 | |
2136 | /* general part of wqe valid - allow for driver checks */ | |
2137 | if (rdi->driver_f.setup_wqe) { | |
2138 | ret = rdi->driver_f.setup_wqe(qp, wqe, call_send); | |
2139 | if (ret < 0) | |
2140 | goto bail_inval_free_ref; | |
2141 | } | |
2142 | ||
2143 | if (!(rdi->post_parms[wr->opcode].flags & RVT_OPERATION_LOCAL)) | |
2144 | qp->s_next_psn = wqe->lpsn + 1; | |
2145 | ||
44dcfa4b MM |
2146 | if (unlikely(reserved_op)) { |
2147 | wqe->wr.send_flags |= RVT_SEND_RESERVE_USED; | |
856cc4c2 | 2148 | rvt_qp_wqe_reserve(qp, wqe); |
44dcfa4b MM |
2149 | } else { |
2150 | wqe->wr.send_flags &= ~RVT_SEND_RESERVE_USED; | |
856cc4c2 | 2151 | qp->s_avail--; |
44dcfa4b | 2152 | } |
14fe13fc | 2153 | trace_rvt_post_one_wr(qp, wqe, wr->num_sge); |
46a80d62 | 2154 | smp_wmb(); /* see request builders */ |
bfbac097 DD |
2155 | qp->s_head = next; |
2156 | ||
2157 | return 0; | |
2158 | ||
d205a06a | 2159 | bail_inval_free_ref: |
52cdbcc2 | 2160 | if (qp->allowed_ops == IB_OPCODE_UD) |
d310c4bf | 2161 | rdma_destroy_ah_attr(wqe->ud_wr.attr); |
bfbac097 DD |
2162 | bail_inval_free: |
2163 | /* release mr holds */ | |
2164 | while (j) { | |
2165 | struct rvt_sge *sge = &wqe->sg_list[--j]; | |
2166 | ||
2167 | rvt_put_mr(sge->mr); | |
2168 | } | |
46a80d62 | 2169 | return ret; |
bfbac097 DD |
2170 | } |
2171 | ||
8cf4020b DD |
2172 | /** |
2173 | * rvt_post_send - post a send on a QP | |
2174 | * @ibqp: the QP to post the send on | |
2175 | * @wr: the list of work requests to post | |
2176 | * @bad_wr: the first bad WR is put here | |
2177 | * | |
2178 | * This may be called from interrupt context. | |
90793f71 DD |
2179 | * |
2180 | * Return: 0 on success else errno | |
8cf4020b | 2181 | */ |
d34ac5cd BVA |
2182 | int rvt_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, |
2183 | const struct ib_send_wr **bad_wr) | |
8cf4020b | 2184 | { |
bfbac097 DD |
2185 | struct rvt_qp *qp = ibqp_to_rvtqp(ibqp); |
2186 | struct rvt_dev_info *rdi = ib_to_rvt(ibqp->device); | |
2187 | unsigned long flags = 0; | |
0b79b277 | 2188 | bool call_send; |
bfbac097 DD |
2189 | unsigned nreq = 0; |
2190 | int err = 0; | |
2191 | ||
46a80d62 | 2192 | spin_lock_irqsave(&qp->s_hlock, flags); |
bfbac097 | 2193 | |
8cf4020b | 2194 | /* |
bfbac097 DD |
2195 | * Ensure QP state is such that we can send. If not bail out early, |
2196 | * there is no need to do this every time we post a send. | |
8cf4020b | 2197 | */ |
bfbac097 | 2198 | if (unlikely(!(ib_rvt_state_ops[qp->state] & RVT_POST_SEND_OK))) { |
46a80d62 | 2199 | spin_unlock_irqrestore(&qp->s_hlock, flags); |
bfbac097 DD |
2200 | return -EINVAL; |
2201 | } | |
8cf4020b | 2202 | |
bfbac097 DD |
2203 | /* |
2204 | * If the send queue is empty, and we only have a single WR then just go | |
2205 | * ahead and kick the send engine into gear. Otherwise we will always | |
2206 | * just schedule the send to happen later. | |
2207 | */ | |
6aa7de05 | 2208 | call_send = qp->s_head == READ_ONCE(qp->s_last) && !wr->next; |
bfbac097 DD |
2209 | |
2210 | for (; wr; wr = wr->next) { | |
91702b4a | 2211 | err = rvt_post_one_wr(qp, wr, &call_send); |
bfbac097 DD |
2212 | if (unlikely(err)) { |
2213 | *bad_wr = wr; | |
2214 | goto bail; | |
2215 | } | |
2216 | nreq++; | |
2217 | } | |
2218 | bail: | |
46a80d62 MM |
2219 | spin_unlock_irqrestore(&qp->s_hlock, flags); |
2220 | if (nreq) { | |
0b79b277 MR |
2221 | /* |
2222 | * Only call do_send if there is exactly one packet, and the | |
2223 | * driver said it was ok. | |
2224 | */ | |
2225 | if (nreq == 1 && call_send) | |
46a80d62 | 2226 | rdi->driver_f.do_send(qp); |
e6d2e017 JJ |
2227 | else |
2228 | rdi->driver_f.schedule_send_no_lock(qp); | |
46a80d62 | 2229 | } |
bfbac097 | 2230 | return err; |
8cf4020b DD |
2231 | } |
2232 | ||
2233 | /** | |
2234 | * rvt_post_srq_receive - post a receive on a shared receive queue | |
2235 | * @ibsrq: the SRQ to post the receive on | |
2236 | * @wr: the list of work requests to post | |
2237 | * @bad_wr: A pointer to the first WR to cause a problem is put here | |
2238 | * | |
2239 | * This may be called from interrupt context. | |
90793f71 DD |
2240 | * |
2241 | * Return: 0 on success else errno | |
8cf4020b | 2242 | */ |
d34ac5cd BVA |
2243 | int rvt_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr, |
2244 | const struct ib_recv_wr **bad_wr) | |
8cf4020b | 2245 | { |
b8f881b9 | 2246 | struct rvt_srq *srq = ibsrq_to_rvtsrq(ibsrq); |
dabac6e4 | 2247 | struct rvt_krwq *wq; |
b8f881b9 JJ |
2248 | unsigned long flags; |
2249 | ||
2250 | for (; wr; wr = wr->next) { | |
2251 | struct rvt_rwqe *wqe; | |
2252 | u32 next; | |
2253 | int i; | |
2254 | ||
2255 | if ((unsigned)wr->num_sge > srq->rq.max_sge) { | |
2256 | *bad_wr = wr; | |
2257 | return -EINVAL; | |
2258 | } | |
2259 | ||
f592ae3c | 2260 | spin_lock_irqsave(&srq->rq.kwq->p_lock, flags); |
dabac6e4 | 2261 | wq = srq->rq.kwq; |
b8f881b9 JJ |
2262 | next = wq->head + 1; |
2263 | if (next >= srq->rq.size) | |
2264 | next = 0; | |
dabac6e4 | 2265 | if (next == READ_ONCE(wq->tail)) { |
f592ae3c | 2266 | spin_unlock_irqrestore(&srq->rq.kwq->p_lock, flags); |
b8f881b9 JJ |
2267 | *bad_wr = wr; |
2268 | return -ENOMEM; | |
2269 | } | |
2270 | ||
2271 | wqe = rvt_get_rwqe_ptr(&srq->rq, wq->head); | |
2272 | wqe->wr_id = wr->wr_id; | |
2273 | wqe->num_sge = wr->num_sge; | |
f10ff380 JG |
2274 | for (i = 0; i < wr->num_sge; i++) { |
2275 | wqe->sg_list[i].addr = wr->sg_list[i].addr; | |
2276 | wqe->sg_list[i].length = wr->sg_list[i].length; | |
2277 | wqe->sg_list[i].lkey = wr->sg_list[i].lkey; | |
2278 | } | |
b8f881b9 | 2279 | /* Make sure queue entry is written before the head index. */ |
dabac6e4 | 2280 | smp_store_release(&wq->head, next); |
f592ae3c | 2281 | spin_unlock_irqrestore(&srq->rq.kwq->p_lock, flags); |
b8f881b9 JJ |
2282 | } |
2283 | return 0; | |
8cf4020b | 2284 | } |
beb5a042 | 2285 | |
f10ff380 JG |
2286 | /* |
2287 | * rvt used the internal kernel struct as part of its ABI, for now make sure | |
2288 | * the kernel struct does not change layout. FIXME: rvt should never cast the | |
2289 | * user struct to a kernel struct. | |
2290 | */ | |
2291 | static struct ib_sge *rvt_cast_sge(struct rvt_wqe_sge *sge) | |
2292 | { | |
2293 | BUILD_BUG_ON(offsetof(struct ib_sge, addr) != | |
2294 | offsetof(struct rvt_wqe_sge, addr)); | |
2295 | BUILD_BUG_ON(offsetof(struct ib_sge, length) != | |
2296 | offsetof(struct rvt_wqe_sge, length)); | |
2297 | BUILD_BUG_ON(offsetof(struct ib_sge, lkey) != | |
2298 | offsetof(struct rvt_wqe_sge, lkey)); | |
2299 | return (struct ib_sge *)sge; | |
2300 | } | |
2301 | ||
832369fa BW |
2302 | /* |
2303 | * Validate a RWQE and fill in the SGE state. | |
2304 | * Return 1 if OK. | |
2305 | */ | |
2306 | static int init_sge(struct rvt_qp *qp, struct rvt_rwqe *wqe) | |
2307 | { | |
2308 | int i, j, ret; | |
2309 | struct ib_wc wc; | |
2310 | struct rvt_lkey_table *rkt; | |
2311 | struct rvt_pd *pd; | |
2312 | struct rvt_sge_state *ss; | |
2313 | struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device); | |
2314 | ||
2315 | rkt = &rdi->lkey_table; | |
2316 | pd = ibpd_to_rvtpd(qp->ibqp.srq ? qp->ibqp.srq->pd : qp->ibqp.pd); | |
2317 | ss = &qp->r_sge; | |
2318 | ss->sg_list = qp->r_sg_list; | |
2319 | qp->r_len = 0; | |
2320 | for (i = j = 0; i < wqe->num_sge; i++) { | |
2321 | if (wqe->sg_list[i].length == 0) | |
2322 | continue; | |
2323 | /* Check LKEY */ | |
2324 | ret = rvt_lkey_ok(rkt, pd, j ? &ss->sg_list[j - 1] : &ss->sge, | |
f10ff380 | 2325 | NULL, rvt_cast_sge(&wqe->sg_list[i]), |
832369fa BW |
2326 | IB_ACCESS_LOCAL_WRITE); |
2327 | if (unlikely(ret <= 0)) | |
2328 | goto bad_lkey; | |
2329 | qp->r_len += wqe->sg_list[i].length; | |
2330 | j++; | |
2331 | } | |
2332 | ss->num_sge = j; | |
2333 | ss->total_len = qp->r_len; | |
2334 | return 1; | |
2335 | ||
2336 | bad_lkey: | |
2337 | while (j) { | |
2338 | struct rvt_sge *sge = --j ? &ss->sg_list[j - 1] : &ss->sge; | |
2339 | ||
2340 | rvt_put_mr(sge->mr); | |
2341 | } | |
2342 | ss->num_sge = 0; | |
2343 | memset(&wc, 0, sizeof(wc)); | |
2344 | wc.wr_id = wqe->wr_id; | |
2345 | wc.status = IB_WC_LOC_PROT_ERR; | |
2346 | wc.opcode = IB_WC_RECV; | |
2347 | wc.qp = &qp->ibqp; | |
2348 | /* Signal solicited completion event. */ | |
2349 | rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, 1); | |
2350 | return 0; | |
2351 | } | |
2352 | ||
f592ae3c KA |
2353 | /** |
2354 | * get_count - count numbers of request work queue entries | |
2355 | * in circular buffer | |
2356 | * @rq: data structure for request queue entry | |
2357 | * @tail: tail indices of the circular buffer | |
2358 | * @head: head indices of the circular buffer | |
2359 | * | |
2360 | * Return - total number of entries in the circular buffer | |
2361 | */ | |
2362 | static u32 get_count(struct rvt_rq *rq, u32 tail, u32 head) | |
2363 | { | |
2364 | u32 count; | |
2365 | ||
2366 | count = head; | |
2367 | ||
2368 | if (count >= rq->size) | |
2369 | count = 0; | |
2370 | if (count < tail) | |
2371 | count += rq->size - tail; | |
2372 | else | |
2373 | count -= tail; | |
2374 | ||
2375 | return count; | |
2376 | } | |
2377 | ||
dabac6e4 KA |
2378 | /** |
2379 | * get_rvt_head - get head indices of the circular buffer | |
2380 | * @rq: data structure for request queue entry | |
2381 | * @ip: the QP | |
2382 | * | |
2383 | * Return - head index value | |
2384 | */ | |
2385 | static inline u32 get_rvt_head(struct rvt_rq *rq, void *ip) | |
2386 | { | |
2387 | u32 head; | |
2388 | ||
2389 | if (ip) | |
2390 | head = RDMA_READ_UAPI_ATOMIC(rq->wq->head); | |
2391 | else | |
2392 | head = rq->kwq->head; | |
2393 | ||
2394 | return head; | |
2395 | } | |
2396 | ||
832369fa BW |
2397 | /** |
2398 | * rvt_get_rwqe - copy the next RWQE into the QP's RWQE | |
2399 | * @qp: the QP | |
2400 | * @wr_id_only: update qp->r_wr_id only, not qp->r_sge | |
2401 | * | |
2402 | * Return -1 if there is a local error, 0 if no RWQE is available, | |
2403 | * otherwise return 1. | |
2404 | * | |
2405 | * Can be called from interrupt level. | |
2406 | */ | |
2407 | int rvt_get_rwqe(struct rvt_qp *qp, bool wr_id_only) | |
2408 | { | |
2409 | unsigned long flags; | |
2410 | struct rvt_rq *rq; | |
f592ae3c | 2411 | struct rvt_krwq *kwq = NULL; |
832369fa BW |
2412 | struct rvt_rwq *wq; |
2413 | struct rvt_srq *srq; | |
2414 | struct rvt_rwqe *wqe; | |
2415 | void (*handler)(struct ib_event *, void *); | |
2416 | u32 tail; | |
dabac6e4 | 2417 | u32 head; |
832369fa | 2418 | int ret; |
dabac6e4 | 2419 | void *ip = NULL; |
832369fa BW |
2420 | |
2421 | if (qp->ibqp.srq) { | |
2422 | srq = ibsrq_to_rvtsrq(qp->ibqp.srq); | |
2423 | handler = srq->ibsrq.event_handler; | |
2424 | rq = &srq->rq; | |
dabac6e4 | 2425 | ip = srq->ip; |
832369fa BW |
2426 | } else { |
2427 | srq = NULL; | |
2428 | handler = NULL; | |
2429 | rq = &qp->r_rq; | |
dabac6e4 | 2430 | ip = qp->ip; |
832369fa BW |
2431 | } |
2432 | ||
f592ae3c | 2433 | spin_lock_irqsave(&rq->kwq->c_lock, flags); |
832369fa BW |
2434 | if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK)) { |
2435 | ret = 0; | |
2436 | goto unlock; | |
2437 | } | |
f592ae3c | 2438 | kwq = rq->kwq; |
dabac6e4 KA |
2439 | if (ip) { |
2440 | wq = rq->wq; | |
2441 | tail = RDMA_READ_UAPI_ATOMIC(wq->tail); | |
2442 | } else { | |
dabac6e4 KA |
2443 | tail = kwq->tail; |
2444 | } | |
832369fa | 2445 | |
832369fa BW |
2446 | /* Validate tail before using it since it is user writable. */ |
2447 | if (tail >= rq->size) | |
2448 | tail = 0; | |
dabac6e4 | 2449 | |
f592ae3c KA |
2450 | if (kwq->count < RVT_RWQ_COUNT_THRESHOLD) { |
2451 | head = get_rvt_head(rq, ip); | |
2452 | kwq->count = get_count(rq, tail, head); | |
2453 | } | |
2454 | if (unlikely(kwq->count == 0)) { | |
832369fa BW |
2455 | ret = 0; |
2456 | goto unlock; | |
2457 | } | |
dabac6e4 | 2458 | /* Make sure entry is read after the count is read. */ |
832369fa BW |
2459 | smp_rmb(); |
2460 | wqe = rvt_get_rwqe_ptr(rq, tail); | |
2461 | /* | |
2462 | * Even though we update the tail index in memory, the verbs | |
2463 | * consumer is not supposed to post more entries until a | |
2464 | * completion is generated. | |
2465 | */ | |
2466 | if (++tail >= rq->size) | |
2467 | tail = 0; | |
dabac6e4 KA |
2468 | if (ip) |
2469 | RDMA_WRITE_UAPI_ATOMIC(wq->tail, tail); | |
2470 | else | |
2471 | kwq->tail = tail; | |
832369fa BW |
2472 | if (!wr_id_only && !init_sge(qp, wqe)) { |
2473 | ret = -1; | |
2474 | goto unlock; | |
2475 | } | |
2476 | qp->r_wr_id = wqe->wr_id; | |
2477 | ||
f592ae3c | 2478 | kwq->count--; |
832369fa BW |
2479 | ret = 1; |
2480 | set_bit(RVT_R_WRID_VALID, &qp->r_aflags); | |
2481 | if (handler) { | |
832369fa BW |
2482 | /* |
2483 | * Validate head pointer value and compute | |
2484 | * the number of remaining WQEs. | |
2485 | */ | |
f592ae3c KA |
2486 | if (kwq->count < srq->limit) { |
2487 | kwq->count = get_count(rq, tail, get_rvt_head(rq, ip)); | |
2488 | if (kwq->count < srq->limit) { | |
2489 | struct ib_event ev; | |
2490 | ||
2491 | srq->limit = 0; | |
2492 | spin_unlock_irqrestore(&rq->kwq->c_lock, flags); | |
2493 | ev.device = qp->ibqp.device; | |
2494 | ev.element.srq = qp->ibqp.srq; | |
2495 | ev.event = IB_EVENT_SRQ_LIMIT_REACHED; | |
2496 | handler(&ev, srq->ibsrq.srq_context); | |
2497 | goto bail; | |
2498 | } | |
832369fa BW |
2499 | } |
2500 | } | |
2501 | unlock: | |
f592ae3c | 2502 | spin_unlock_irqrestore(&rq->kwq->c_lock, flags); |
832369fa BW |
2503 | bail: |
2504 | return ret; | |
2505 | } | |
2506 | EXPORT_SYMBOL(rvt_get_rwqe); | |
2507 | ||
beb5a042 BW |
2508 | /** |
2509 | * qp_comm_est - handle trap with QP established | |
2510 | * @qp: the QP | |
2511 | */ | |
2512 | void rvt_comm_est(struct rvt_qp *qp) | |
2513 | { | |
2514 | qp->r_flags |= RVT_R_COMM_EST; | |
2515 | if (qp->ibqp.event_handler) { | |
2516 | struct ib_event ev; | |
2517 | ||
2518 | ev.device = qp->ibqp.device; | |
2519 | ev.element.qp = &qp->ibqp; | |
2520 | ev.event = IB_EVENT_COMM_EST; | |
2521 | qp->ibqp.event_handler(&ev, qp->ibqp.qp_context); | |
2522 | } | |
2523 | } | |
2524 | EXPORT_SYMBOL(rvt_comm_est); | |
2525 | ||
2526 | void rvt_rc_error(struct rvt_qp *qp, enum ib_wc_status err) | |
2527 | { | |
2528 | unsigned long flags; | |
2529 | int lastwqe; | |
2530 | ||
2531 | spin_lock_irqsave(&qp->s_lock, flags); | |
2532 | lastwqe = rvt_error_qp(qp, err); | |
2533 | spin_unlock_irqrestore(&qp->s_lock, flags); | |
2534 | ||
2535 | if (lastwqe) { | |
2536 | struct ib_event ev; | |
2537 | ||
2538 | ev.device = qp->ibqp.device; | |
2539 | ev.element.qp = &qp->ibqp; | |
2540 | ev.event = IB_EVENT_QP_LAST_WQE_REACHED; | |
2541 | qp->ibqp.event_handler(&ev, qp->ibqp.qp_context); | |
2542 | } | |
2543 | } | |
2544 | EXPORT_SYMBOL(rvt_rc_error); | |
11a10d4b | 2545 | |
881fccb8 DH |
2546 | /* |
2547 | * rvt_rnr_tbl_to_usec - return index into ib_rvt_rnr_table | |
2548 | * @index - the index | |
2549 | * return usec from an index into ib_rvt_rnr_table | |
2550 | */ | |
2551 | unsigned long rvt_rnr_tbl_to_usec(u32 index) | |
2552 | { | |
832666c1 | 2553 | return ib_rvt_rnr_table[(index & IB_AETH_CREDIT_MASK)]; |
881fccb8 DH |
2554 | } |
2555 | EXPORT_SYMBOL(rvt_rnr_tbl_to_usec); | |
2556 | ||
11a10d4b VSD |
2557 | static inline unsigned long rvt_aeth_to_usec(u32 aeth) |
2558 | { | |
832666c1 DH |
2559 | return ib_rvt_rnr_table[(aeth >> IB_AETH_CREDIT_SHIFT) & |
2560 | IB_AETH_CREDIT_MASK]; | |
11a10d4b VSD |
2561 | } |
2562 | ||
2563 | /* | |
039cd3da | 2564 | * rvt_add_retry_timer_ext - add/start a retry timer |
11a10d4b | 2565 | * @qp - the QP |
039cd3da | 2566 | * @shift - timeout shift to wait for multiple packets |
11a10d4b VSD |
2567 | * add a retry timer on the QP |
2568 | */ | |
039cd3da | 2569 | void rvt_add_retry_timer_ext(struct rvt_qp *qp, u8 shift) |
11a10d4b VSD |
2570 | { |
2571 | struct ib_qp *ibqp = &qp->ibqp; | |
2572 | struct rvt_dev_info *rdi = ib_to_rvt(ibqp->device); | |
2573 | ||
2574 | lockdep_assert_held(&qp->s_lock); | |
2575 | qp->s_flags |= RVT_S_TIMER; | |
2576 | /* 4.096 usec. * (1 << qp->timeout) */ | |
039cd3da KW |
2577 | qp->s_timer.expires = jiffies + rdi->busy_jiffies + |
2578 | (qp->timeout_jiffies << shift); | |
11a10d4b VSD |
2579 | add_timer(&qp->s_timer); |
2580 | } | |
039cd3da | 2581 | EXPORT_SYMBOL(rvt_add_retry_timer_ext); |
11a10d4b VSD |
2582 | |
2583 | /** | |
7c21072d | 2584 | * rvt_add_rnr_timer - add/start an rnr timer on the QP |
2585 | * @qp: the QP | |
2586 | * @aeth: aeth of RNR timeout, simulated aeth for loopback | |
11a10d4b VSD |
2587 | */ |
2588 | void rvt_add_rnr_timer(struct rvt_qp *qp, u32 aeth) | |
2589 | { | |
2590 | u32 to; | |
2591 | ||
2592 | lockdep_assert_held(&qp->s_lock); | |
2593 | qp->s_flags |= RVT_S_WAIT_RNR; | |
2594 | to = rvt_aeth_to_usec(aeth); | |
57f6b663 | 2595 | trace_rvt_rnrnak_add(qp, to); |
11a10d4b | 2596 | hrtimer_start(&qp->s_rnr_timer, |
3ce459cd | 2597 | ns_to_ktime(1000 * to), HRTIMER_MODE_REL_PINNED); |
11a10d4b VSD |
2598 | } |
2599 | EXPORT_SYMBOL(rvt_add_rnr_timer); | |
2600 | ||
2601 | /** | |
2602 | * rvt_stop_rc_timers - stop all timers | |
7c21072d | 2603 | * @qp: the QP |
11a10d4b VSD |
2604 | * stop any pending timers |
2605 | */ | |
2606 | void rvt_stop_rc_timers(struct rvt_qp *qp) | |
2607 | { | |
2608 | lockdep_assert_held(&qp->s_lock); | |
2609 | /* Remove QP from all timers */ | |
2610 | if (qp->s_flags & (RVT_S_TIMER | RVT_S_WAIT_RNR)) { | |
2611 | qp->s_flags &= ~(RVT_S_TIMER | RVT_S_WAIT_RNR); | |
2612 | del_timer(&qp->s_timer); | |
2613 | hrtimer_try_to_cancel(&qp->s_rnr_timer); | |
2614 | } | |
2615 | } | |
2616 | EXPORT_SYMBOL(rvt_stop_rc_timers); | |
2617 | ||
2618 | /** | |
2619 | * rvt_stop_rnr_timer - stop an rnr timer | |
2620 | * @qp - the QP | |
2621 | * | |
2622 | * stop an rnr timer and return if the timer | |
2623 | * had been pending. | |
2624 | */ | |
57f6b663 | 2625 | static void rvt_stop_rnr_timer(struct rvt_qp *qp) |
11a10d4b | 2626 | { |
11a10d4b VSD |
2627 | lockdep_assert_held(&qp->s_lock); |
2628 | /* Remove QP from rnr timer */ | |
2629 | if (qp->s_flags & RVT_S_WAIT_RNR) { | |
2630 | qp->s_flags &= ~RVT_S_WAIT_RNR; | |
57f6b663 | 2631 | trace_rvt_rnrnak_stop(qp, 0); |
11a10d4b | 2632 | } |
11a10d4b VSD |
2633 | } |
2634 | ||
2635 | /** | |
2636 | * rvt_del_timers_sync - wait for any timeout routines to exit | |
7c21072d | 2637 | * @qp: the QP |
11a10d4b VSD |
2638 | */ |
2639 | void rvt_del_timers_sync(struct rvt_qp *qp) | |
2640 | { | |
2641 | del_timer_sync(&qp->s_timer); | |
2642 | hrtimer_cancel(&qp->s_rnr_timer); | |
2643 | } | |
2644 | EXPORT_SYMBOL(rvt_del_timers_sync); | |
2645 | ||
7c21072d | 2646 | /* |
11a10d4b VSD |
2647 | * This is called from s_timer for missing responses. |
2648 | */ | |
a2930e5c | 2649 | static void rvt_rc_timeout(struct timer_list *t) |
11a10d4b | 2650 | { |
a2930e5c | 2651 | struct rvt_qp *qp = from_timer(qp, t, s_timer); |
11a10d4b VSD |
2652 | struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device); |
2653 | unsigned long flags; | |
2654 | ||
2655 | spin_lock_irqsave(&qp->r_lock, flags); | |
2656 | spin_lock(&qp->s_lock); | |
2657 | if (qp->s_flags & RVT_S_TIMER) { | |
5f14e4e6 SS |
2658 | struct rvt_ibport *rvp = rdi->ports[qp->port_num - 1]; |
2659 | ||
11a10d4b | 2660 | qp->s_flags &= ~RVT_S_TIMER; |
5f14e4e6 | 2661 | rvp->n_rc_timeouts++; |
11a10d4b | 2662 | del_timer(&qp->s_timer); |
5f14e4e6 | 2663 | trace_rvt_rc_timeout(qp, qp->s_last_psn + 1); |
11a10d4b VSD |
2664 | if (rdi->driver_f.notify_restart_rc) |
2665 | rdi->driver_f.notify_restart_rc(qp, | |
2666 | qp->s_last_psn + 1, | |
2667 | 1); | |
2668 | rdi->driver_f.schedule_send(qp); | |
2669 | } | |
2670 | spin_unlock(&qp->s_lock); | |
2671 | spin_unlock_irqrestore(&qp->r_lock, flags); | |
2672 | } | |
2673 | ||
2674 | /* | |
2675 | * This is called from s_timer for RNR timeouts. | |
2676 | */ | |
2677 | enum hrtimer_restart rvt_rc_rnr_retry(struct hrtimer *t) | |
2678 | { | |
2679 | struct rvt_qp *qp = container_of(t, struct rvt_qp, s_rnr_timer); | |
2680 | struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device); | |
2681 | unsigned long flags; | |
2682 | ||
2683 | spin_lock_irqsave(&qp->s_lock, flags); | |
2684 | rvt_stop_rnr_timer(qp); | |
57f6b663 | 2685 | trace_rvt_rnrnak_timeout(qp, 0); |
11a10d4b VSD |
2686 | rdi->driver_f.schedule_send(qp); |
2687 | spin_unlock_irqrestore(&qp->s_lock, flags); | |
2688 | return HRTIMER_NORESTART; | |
2689 | } | |
2690 | EXPORT_SYMBOL(rvt_rc_rnr_retry); | |
4734b4f4 MM |
2691 | |
2692 | /** | |
2693 | * rvt_qp_iter_init - initial for QP iteration | |
4f9a3018 RD |
2694 | * @rdi: rvt devinfo |
2695 | * @v: u64 value | |
7c21072d | 2696 | * @cb: user-defined callback |
4734b4f4 MM |
2697 | * |
2698 | * This returns an iterator suitable for iterating QPs | |
2699 | * in the system. | |
2700 | * | |
7c21072d | 2701 | * The @cb is a user-defined callback and @v is a 64-bit |
2702 | * value passed to and relevant for processing in the | |
4734b4f4 MM |
2703 | * @cb. An example use case would be to alter QP processing |
2704 | * based on criteria not part of the rvt_qp. | |
2705 | * | |
2706 | * Use cases that require memory allocation to succeed | |
2707 | * must preallocate appropriately. | |
2708 | * | |
2709 | * Return: a pointer to an rvt_qp_iter or NULL | |
2710 | */ | |
2711 | struct rvt_qp_iter *rvt_qp_iter_init(struct rvt_dev_info *rdi, | |
2712 | u64 v, | |
2713 | void (*cb)(struct rvt_qp *qp, u64 v)) | |
2714 | { | |
2715 | struct rvt_qp_iter *i; | |
2716 | ||
2717 | i = kzalloc(sizeof(*i), GFP_KERNEL); | |
2718 | if (!i) | |
2719 | return NULL; | |
2720 | ||
2721 | i->rdi = rdi; | |
2722 | /* number of special QPs (SMI/GSI) for device */ | |
2723 | i->specials = rdi->ibdev.phys_port_cnt * 2; | |
2724 | i->v = v; | |
2725 | i->cb = cb; | |
2726 | ||
2727 | return i; | |
2728 | } | |
2729 | EXPORT_SYMBOL(rvt_qp_iter_init); | |
2730 | ||
2731 | /** | |
2732 | * rvt_qp_iter_next - return the next QP in iter | |
7c21072d | 2733 | * @iter: the iterator |
4734b4f4 MM |
2734 | * |
2735 | * Fine grained QP iterator suitable for use | |
2736 | * with debugfs seq_file mechanisms. | |
2737 | * | |
2738 | * Updates iter->qp with the current QP when the return | |
2739 | * value is 0. | |
2740 | * | |
2741 | * Return: 0 - iter->qp is valid 1 - no more QPs | |
2742 | */ | |
2743 | int rvt_qp_iter_next(struct rvt_qp_iter *iter) | |
2744 | __must_hold(RCU) | |
2745 | { | |
2746 | int n = iter->n; | |
2747 | int ret = 1; | |
2748 | struct rvt_qp *pqp = iter->qp; | |
2749 | struct rvt_qp *qp; | |
2750 | struct rvt_dev_info *rdi = iter->rdi; | |
2751 | ||
2752 | /* | |
2753 | * The approach is to consider the special qps | |
2754 | * as additional table entries before the | |
2755 | * real hash table. Since the qp code sets | |
2756 | * the qp->next hash link to NULL, this works just fine. | |
2757 | * | |
2758 | * iter->specials is 2 * # ports | |
2759 | * | |
2760 | * n = 0..iter->specials is the special qp indices | |
2761 | * | |
2762 | * n = iter->specials..rdi->qp_dev->qp_table_size+iter->specials are | |
2763 | * the potential hash bucket entries | |
2764 | * | |
2765 | */ | |
2766 | for (; n < rdi->qp_dev->qp_table_size + iter->specials; n++) { | |
2767 | if (pqp) { | |
2768 | qp = rcu_dereference(pqp->next); | |
2769 | } else { | |
2770 | if (n < iter->specials) { | |
2771 | struct rvt_ibport *rvp; | |
2772 | int pidx; | |
2773 | ||
2774 | pidx = n % rdi->ibdev.phys_port_cnt; | |
2775 | rvp = rdi->ports[pidx]; | |
2776 | qp = rcu_dereference(rvp->qp[n & 1]); | |
2777 | } else { | |
2778 | qp = rcu_dereference( | |
2779 | rdi->qp_dev->qp_table[ | |
2780 | (n - iter->specials)]); | |
2781 | } | |
2782 | } | |
2783 | pqp = qp; | |
2784 | if (qp) { | |
2785 | iter->qp = qp; | |
2786 | iter->n = n; | |
2787 | return 0; | |
2788 | } | |
2789 | } | |
2790 | return ret; | |
2791 | } | |
2792 | EXPORT_SYMBOL(rvt_qp_iter_next); | |
2793 | ||
2794 | /** | |
2795 | * rvt_qp_iter - iterate all QPs | |
7c21072d | 2796 | * @rdi: rvt devinfo |
2797 | * @v: a 64-bit value | |
2798 | * @cb: a callback | |
4734b4f4 MM |
2799 | * |
2800 | * This provides a way for iterating all QPs. | |
2801 | * | |
7c21072d | 2802 | * The @cb is a user-defined callback and @v is a 64-bit |
2803 | * value passed to and relevant for processing in the | |
4734b4f4 MM |
2804 | * cb. An example use case would be to alter QP processing |
2805 | * based on criteria not part of the rvt_qp. | |
2806 | * | |
2807 | * The code has an internal iterator to simplify | |
2808 | * non seq_file use cases. | |
2809 | */ | |
2810 | void rvt_qp_iter(struct rvt_dev_info *rdi, | |
2811 | u64 v, | |
2812 | void (*cb)(struct rvt_qp *qp, u64 v)) | |
2813 | { | |
2814 | int ret; | |
2815 | struct rvt_qp_iter i = { | |
2816 | .rdi = rdi, | |
2817 | .specials = rdi->ibdev.phys_port_cnt * 2, | |
2818 | .v = v, | |
2819 | .cb = cb | |
2820 | }; | |
2821 | ||
2822 | rcu_read_lock(); | |
2823 | do { | |
2824 | ret = rvt_qp_iter_next(&i); | |
2825 | if (!ret) { | |
2826 | rvt_get_qp(i.qp); | |
2827 | rcu_read_unlock(); | |
2828 | i.cb(i.qp, i.v); | |
2829 | rcu_read_lock(); | |
2830 | rvt_put_qp(i.qp); | |
2831 | } | |
2832 | } while (!ret); | |
2833 | rcu_read_unlock(); | |
2834 | } | |
2835 | EXPORT_SYMBOL(rvt_qp_iter); | |
019f118b | 2836 | |
116aa033 VSD |
2837 | /* |
2838 | * This should be called with s_lock held. | |
2839 | */ | |
2840 | void rvt_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe, | |
2841 | enum ib_wc_status status) | |
2842 | { | |
2843 | u32 old_last, last; | |
4a9ceb7d | 2844 | struct rvt_dev_info *rdi; |
116aa033 VSD |
2845 | |
2846 | if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_OR_FLUSH_SEND)) | |
2847 | return; | |
4a9ceb7d | 2848 | rdi = ib_to_rvt(qp->ibqp.device); |
116aa033 | 2849 | |
4a9ceb7d MM |
2850 | old_last = qp->s_last; |
2851 | trace_rvt_qp_send_completion(qp, wqe, old_last); | |
2852 | last = rvt_qp_complete_swqe(qp, wqe, rdi->wc_opcode[wqe->wr.opcode], | |
2853 | status); | |
116aa033 VSD |
2854 | if (qp->s_acked == old_last) |
2855 | qp->s_acked = last; | |
2856 | if (qp->s_cur == old_last) | |
2857 | qp->s_cur = last; | |
2858 | if (qp->s_tail == old_last) | |
2859 | qp->s_tail = last; | |
2860 | if (qp->state == IB_QPS_SQD && last == qp->s_cur) | |
2861 | qp->s_draining = 0; | |
2862 | } | |
2863 | EXPORT_SYMBOL(rvt_send_complete); | |
2864 | ||
019f118b BW |
2865 | /** |
2866 | * rvt_copy_sge - copy data to SGE memory | |
2867 | * @qp: associated QP | |
2868 | * @ss: the SGE state | |
2869 | * @data: the data to copy | |
2870 | * @length: the length of the data | |
2871 | * @release: boolean to release MR | |
2872 | * @copy_last: do a separate copy of the last 8 bytes | |
2873 | */ | |
2874 | void rvt_copy_sge(struct rvt_qp *qp, struct rvt_sge_state *ss, | |
2875 | void *data, u32 length, | |
2876 | bool release, bool copy_last) | |
2877 | { | |
2878 | struct rvt_sge *sge = &ss->sge; | |
2879 | int i; | |
2880 | bool in_last = false; | |
2881 | bool cacheless_copy = false; | |
2882 | struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device); | |
2883 | struct rvt_wss *wss = rdi->wss; | |
2884 | unsigned int sge_copy_mode = rdi->dparms.sge_copy_mode; | |
2885 | ||
2886 | if (sge_copy_mode == RVT_SGE_COPY_CACHELESS) { | |
2887 | cacheless_copy = length >= PAGE_SIZE; | |
2888 | } else if (sge_copy_mode == RVT_SGE_COPY_ADAPTIVE) { | |
2889 | if (length >= PAGE_SIZE) { | |
2890 | /* | |
2891 | * NOTE: this *assumes*: | |
2892 | * o The first vaddr is the dest. | |
2893 | * o If multiple pages, then vaddr is sequential. | |
2894 | */ | |
2895 | wss_insert(wss, sge->vaddr); | |
2896 | if (length >= (2 * PAGE_SIZE)) | |
2897 | wss_insert(wss, (sge->vaddr + PAGE_SIZE)); | |
2898 | ||
2899 | cacheless_copy = wss_exceeds_threshold(wss); | |
2900 | } else { | |
2901 | wss_advance_clean_counter(wss); | |
2902 | } | |
2903 | } | |
2904 | ||
2905 | if (copy_last) { | |
2906 | if (length > 8) { | |
2907 | length -= 8; | |
2908 | } else { | |
2909 | copy_last = false; | |
2910 | in_last = true; | |
2911 | } | |
2912 | } | |
2913 | ||
2914 | again: | |
2915 | while (length) { | |
2916 | u32 len = rvt_get_sge_length(sge, length); | |
2917 | ||
2918 | WARN_ON_ONCE(len == 0); | |
2919 | if (unlikely(in_last)) { | |
2920 | /* enforce byte transfer ordering */ | |
2921 | for (i = 0; i < len; i++) | |
2922 | ((u8 *)sge->vaddr)[i] = ((u8 *)data)[i]; | |
2923 | } else if (cacheless_copy) { | |
2924 | cacheless_memcpy(sge->vaddr, data, len); | |
2925 | } else { | |
2926 | memcpy(sge->vaddr, data, len); | |
2927 | } | |
2928 | rvt_update_sge(ss, len, release); | |
2929 | data += len; | |
2930 | length -= len; | |
2931 | } | |
2932 | ||
2933 | if (copy_last) { | |
2934 | copy_last = false; | |
2935 | in_last = true; | |
2936 | length = 8; | |
2937 | goto again; | |
2938 | } | |
2939 | } | |
2940 | EXPORT_SYMBOL(rvt_copy_sge); | |
15703461 | 2941 | |
d757c60e MR |
2942 | static enum ib_wc_status loopback_qp_drop(struct rvt_ibport *rvp, |
2943 | struct rvt_qp *sqp) | |
2944 | { | |
2945 | rvp->n_pkt_drops++; | |
2946 | /* | |
2947 | * For RC, the requester would timeout and retry so | |
2948 | * shortcut the timeouts and just signal too many retries. | |
2949 | */ | |
2950 | return sqp->ibqp.qp_type == IB_QPT_RC ? | |
2951 | IB_WC_RETRY_EXC_ERR : IB_WC_SUCCESS; | |
2952 | } | |
2953 | ||
15703461 VSD |
2954 | /** |
2955 | * ruc_loopback - handle UC and RC loopback requests | |
2956 | * @sqp: the sending QP | |
2957 | * | |
2958 | * This is called from rvt_do_send() to forward a WQE addressed to the same HFI | |
2959 | * Note that although we are single threaded due to the send engine, we still | |
2960 | * have to protect against post_send(). We don't have to worry about | |
2961 | * receive interrupts since this is a connected protocol and all packets | |
2962 | * will pass through here. | |
2963 | */ | |
2964 | void rvt_ruc_loopback(struct rvt_qp *sqp) | |
2965 | { | |
2966 | struct rvt_ibport *rvp = NULL; | |
2967 | struct rvt_dev_info *rdi = ib_to_rvt(sqp->ibqp.device); | |
2968 | struct rvt_qp *qp; | |
2969 | struct rvt_swqe *wqe; | |
2970 | struct rvt_sge *sge; | |
2971 | unsigned long flags; | |
2972 | struct ib_wc wc; | |
2973 | u64 sdata; | |
2974 | atomic64_t *maddr; | |
2975 | enum ib_wc_status send_status; | |
2976 | bool release; | |
2977 | int ret; | |
2978 | bool copy_last = false; | |
2979 | int local_ops = 0; | |
2980 | ||
2981 | rcu_read_lock(); | |
2982 | rvp = rdi->ports[sqp->port_num - 1]; | |
2983 | ||
2984 | /* | |
2985 | * Note that we check the responder QP state after | |
2986 | * checking the requester's state. | |
2987 | */ | |
2988 | ||
2989 | qp = rvt_lookup_qpn(ib_to_rvt(sqp->ibqp.device), rvp, | |
2990 | sqp->remote_qpn); | |
2991 | ||
2992 | spin_lock_irqsave(&sqp->s_lock, flags); | |
2993 | ||
2994 | /* Return if we are already busy processing a work request. */ | |
2995 | if ((sqp->s_flags & (RVT_S_BUSY | RVT_S_ANY_WAIT)) || | |
2996 | !(ib_rvt_state_ops[sqp->state] & RVT_PROCESS_OR_FLUSH_SEND)) | |
2997 | goto unlock; | |
2998 | ||
2999 | sqp->s_flags |= RVT_S_BUSY; | |
3000 | ||
3001 | again: | |
3002 | if (sqp->s_last == READ_ONCE(sqp->s_head)) | |
3003 | goto clr_busy; | |
3004 | wqe = rvt_get_swqe_ptr(sqp, sqp->s_last); | |
3005 | ||
3006 | /* Return if it is not OK to start a new work request. */ | |
3007 | if (!(ib_rvt_state_ops[sqp->state] & RVT_PROCESS_NEXT_SEND_OK)) { | |
3008 | if (!(ib_rvt_state_ops[sqp->state] & RVT_FLUSH_SEND)) | |
3009 | goto clr_busy; | |
3010 | /* We are in the error state, flush the work request. */ | |
3011 | send_status = IB_WC_WR_FLUSH_ERR; | |
3012 | goto flush_send; | |
3013 | } | |
3014 | ||
3015 | /* | |
3016 | * We can rely on the entry not changing without the s_lock | |
3017 | * being held until we update s_last. | |
3018 | * We increment s_cur to indicate s_last is in progress. | |
3019 | */ | |
3020 | if (sqp->s_last == sqp->s_cur) { | |
3021 | if (++sqp->s_cur >= sqp->s_size) | |
3022 | sqp->s_cur = 0; | |
3023 | } | |
3024 | spin_unlock_irqrestore(&sqp->s_lock, flags); | |
3025 | ||
d757c60e MR |
3026 | if (!qp) { |
3027 | send_status = loopback_qp_drop(rvp, sqp); | |
3028 | goto serr_no_r_lock; | |
3029 | } | |
3030 | spin_lock_irqsave(&qp->r_lock, flags); | |
3031 | if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) || | |
15703461 | 3032 | qp->ibqp.qp_type != sqp->ibqp.qp_type) { |
d757c60e | 3033 | send_status = loopback_qp_drop(rvp, sqp); |
15703461 VSD |
3034 | goto serr; |
3035 | } | |
3036 | ||
3037 | memset(&wc, 0, sizeof(wc)); | |
3038 | send_status = IB_WC_SUCCESS; | |
3039 | ||
3040 | release = true; | |
3041 | sqp->s_sge.sge = wqe->sg_list[0]; | |
3042 | sqp->s_sge.sg_list = wqe->sg_list + 1; | |
3043 | sqp->s_sge.num_sge = wqe->wr.num_sge; | |
3044 | sqp->s_len = wqe->length; | |
3045 | switch (wqe->wr.opcode) { | |
3046 | case IB_WR_REG_MR: | |
3047 | goto send_comp; | |
3048 | ||
3049 | case IB_WR_LOCAL_INV: | |
3050 | if (!(wqe->wr.send_flags & RVT_SEND_COMPLETION_ONLY)) { | |
3051 | if (rvt_invalidate_rkey(sqp, | |
3052 | wqe->wr.ex.invalidate_rkey)) | |
3053 | send_status = IB_WC_LOC_PROT_ERR; | |
3054 | local_ops = 1; | |
3055 | } | |
3056 | goto send_comp; | |
3057 | ||
3058 | case IB_WR_SEND_WITH_INV: | |
15703461 | 3059 | case IB_WR_SEND_WITH_IMM: |
15703461 | 3060 | case IB_WR_SEND: |
15703461 VSD |
3061 | ret = rvt_get_rwqe(qp, false); |
3062 | if (ret < 0) | |
3063 | goto op_err; | |
3064 | if (!ret) | |
3065 | goto rnr_nak; | |
09ce351d MM |
3066 | if (wqe->length > qp->r_len) |
3067 | goto inv_err; | |
38bbc9f0 MM |
3068 | switch (wqe->wr.opcode) { |
3069 | case IB_WR_SEND_WITH_INV: | |
3070 | if (!rvt_invalidate_rkey(qp, | |
3071 | wqe->wr.ex.invalidate_rkey)) { | |
3072 | wc.wc_flags = IB_WC_WITH_INVALIDATE; | |
3073 | wc.ex.invalidate_rkey = | |
3074 | wqe->wr.ex.invalidate_rkey; | |
3075 | } | |
3076 | break; | |
3077 | case IB_WR_SEND_WITH_IMM: | |
3078 | wc.wc_flags = IB_WC_WITH_IMM; | |
3079 | wc.ex.imm_data = wqe->wr.ex.imm_data; | |
3080 | break; | |
3081 | default: | |
3082 | break; | |
3083 | } | |
15703461 VSD |
3084 | break; |
3085 | ||
3086 | case IB_WR_RDMA_WRITE_WITH_IMM: | |
3087 | if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_WRITE))) | |
3088 | goto inv_err; | |
3089 | wc.wc_flags = IB_WC_WITH_IMM; | |
3090 | wc.ex.imm_data = wqe->wr.ex.imm_data; | |
3091 | ret = rvt_get_rwqe(qp, true); | |
3092 | if (ret < 0) | |
3093 | goto op_err; | |
3094 | if (!ret) | |
3095 | goto rnr_nak; | |
3096 | /* skip copy_last set and qp_access_flags recheck */ | |
3097 | goto do_write; | |
3098 | case IB_WR_RDMA_WRITE: | |
3099 | copy_last = rvt_is_user_qp(qp); | |
3100 | if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_WRITE))) | |
3101 | goto inv_err; | |
3102 | do_write: | |
3103 | if (wqe->length == 0) | |
3104 | break; | |
3105 | if (unlikely(!rvt_rkey_ok(qp, &qp->r_sge.sge, wqe->length, | |
3106 | wqe->rdma_wr.remote_addr, | |
3107 | wqe->rdma_wr.rkey, | |
3108 | IB_ACCESS_REMOTE_WRITE))) | |
3109 | goto acc_err; | |
3110 | qp->r_sge.sg_list = NULL; | |
3111 | qp->r_sge.num_sge = 1; | |
3112 | qp->r_sge.total_len = wqe->length; | |
3113 | break; | |
3114 | ||
3115 | case IB_WR_RDMA_READ: | |
3116 | if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_READ))) | |
3117 | goto inv_err; | |
3118 | if (unlikely(!rvt_rkey_ok(qp, &sqp->s_sge.sge, wqe->length, | |
3119 | wqe->rdma_wr.remote_addr, | |
3120 | wqe->rdma_wr.rkey, | |
3121 | IB_ACCESS_REMOTE_READ))) | |
3122 | goto acc_err; | |
3123 | release = false; | |
3124 | sqp->s_sge.sg_list = NULL; | |
3125 | sqp->s_sge.num_sge = 1; | |
3126 | qp->r_sge.sge = wqe->sg_list[0]; | |
3127 | qp->r_sge.sg_list = wqe->sg_list + 1; | |
3128 | qp->r_sge.num_sge = wqe->wr.num_sge; | |
3129 | qp->r_sge.total_len = wqe->length; | |
3130 | break; | |
3131 | ||
3132 | case IB_WR_ATOMIC_CMP_AND_SWP: | |
3133 | case IB_WR_ATOMIC_FETCH_AND_ADD: | |
3134 | if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_ATOMIC))) | |
3135 | goto inv_err; | |
3136 | if (unlikely(!rvt_rkey_ok(qp, &qp->r_sge.sge, sizeof(u64), | |
3137 | wqe->atomic_wr.remote_addr, | |
3138 | wqe->atomic_wr.rkey, | |
3139 | IB_ACCESS_REMOTE_ATOMIC))) | |
3140 | goto acc_err; | |
3141 | /* Perform atomic OP and save result. */ | |
3142 | maddr = (atomic64_t *)qp->r_sge.sge.vaddr; | |
3143 | sdata = wqe->atomic_wr.compare_add; | |
3144 | *(u64 *)sqp->s_sge.sge.vaddr = | |
3145 | (wqe->wr.opcode == IB_WR_ATOMIC_FETCH_AND_ADD) ? | |
3146 | (u64)atomic64_add_return(sdata, maddr) - sdata : | |
3147 | (u64)cmpxchg((u64 *)qp->r_sge.sge.vaddr, | |
3148 | sdata, wqe->atomic_wr.swap); | |
3149 | rvt_put_mr(qp->r_sge.sge.mr); | |
3150 | qp->r_sge.num_sge = 0; | |
3151 | goto send_comp; | |
3152 | ||
3153 | default: | |
3154 | send_status = IB_WC_LOC_QP_OP_ERR; | |
3155 | goto serr; | |
3156 | } | |
3157 | ||
3158 | sge = &sqp->s_sge.sge; | |
3159 | while (sqp->s_len) { | |
db421a54 | 3160 | u32 len = rvt_get_sge_length(sge, sqp->s_len); |
15703461 | 3161 | |
15703461 VSD |
3162 | WARN_ON_ONCE(len == 0); |
3163 | rvt_copy_sge(qp, &qp->r_sge, sge->vaddr, | |
3164 | len, release, copy_last); | |
db421a54 | 3165 | rvt_update_sge(&sqp->s_sge, len, !release); |
15703461 VSD |
3166 | sqp->s_len -= len; |
3167 | } | |
3168 | if (release) | |
3169 | rvt_put_ss(&qp->r_sge); | |
3170 | ||
3171 | if (!test_and_clear_bit(RVT_R_WRID_VALID, &qp->r_aflags)) | |
3172 | goto send_comp; | |
3173 | ||
3174 | if (wqe->wr.opcode == IB_WR_RDMA_WRITE_WITH_IMM) | |
3175 | wc.opcode = IB_WC_RECV_RDMA_WITH_IMM; | |
3176 | else | |
3177 | wc.opcode = IB_WC_RECV; | |
3178 | wc.wr_id = qp->r_wr_id; | |
3179 | wc.status = IB_WC_SUCCESS; | |
3180 | wc.byte_len = wqe->length; | |
3181 | wc.qp = &qp->ibqp; | |
3182 | wc.src_qp = qp->remote_qpn; | |
3183 | wc.slid = rdma_ah_get_dlid(&qp->remote_ah_attr) & U16_MAX; | |
3184 | wc.sl = rdma_ah_get_sl(&qp->remote_ah_attr); | |
3185 | wc.port_num = 1; | |
3186 | /* Signal completion event if the solicited bit is set. */ | |
5136bfea | 3187 | rvt_recv_cq(qp, &wc, wqe->wr.send_flags & IB_SEND_SOLICITED); |
15703461 VSD |
3188 | |
3189 | send_comp: | |
d757c60e | 3190 | spin_unlock_irqrestore(&qp->r_lock, flags); |
15703461 VSD |
3191 | spin_lock_irqsave(&sqp->s_lock, flags); |
3192 | rvp->n_loop_pkts++; | |
3193 | flush_send: | |
3194 | sqp->s_rnr_retry = sqp->s_rnr_retry_cnt; | |
3195 | rvt_send_complete(sqp, wqe, send_status); | |
3196 | if (local_ops) { | |
3197 | atomic_dec(&sqp->local_ops_pending); | |
3198 | local_ops = 0; | |
3199 | } | |
3200 | goto again; | |
3201 | ||
3202 | rnr_nak: | |
3203 | /* Handle RNR NAK */ | |
3204 | if (qp->ibqp.qp_type == IB_QPT_UC) | |
3205 | goto send_comp; | |
3206 | rvp->n_rnr_naks++; | |
3207 | /* | |
3208 | * Note: we don't need the s_lock held since the BUSY flag | |
3209 | * makes this single threaded. | |
3210 | */ | |
3211 | if (sqp->s_rnr_retry == 0) { | |
3212 | send_status = IB_WC_RNR_RETRY_EXC_ERR; | |
3213 | goto serr; | |
3214 | } | |
3215 | if (sqp->s_rnr_retry_cnt < 7) | |
3216 | sqp->s_rnr_retry--; | |
d757c60e | 3217 | spin_unlock_irqrestore(&qp->r_lock, flags); |
15703461 VSD |
3218 | spin_lock_irqsave(&sqp->s_lock, flags); |
3219 | if (!(ib_rvt_state_ops[sqp->state] & RVT_PROCESS_RECV_OK)) | |
3220 | goto clr_busy; | |
3221 | rvt_add_rnr_timer(sqp, qp->r_min_rnr_timer << | |
3222 | IB_AETH_CREDIT_SHIFT); | |
3223 | goto clr_busy; | |
3224 | ||
3225 | op_err: | |
3226 | send_status = IB_WC_REM_OP_ERR; | |
3227 | wc.status = IB_WC_LOC_QP_OP_ERR; | |
3228 | goto err; | |
3229 | ||
3230 | inv_err: | |
09ce351d MM |
3231 | send_status = |
3232 | sqp->ibqp.qp_type == IB_QPT_RC ? | |
3233 | IB_WC_REM_INV_REQ_ERR : | |
3234 | IB_WC_SUCCESS; | |
15703461 VSD |
3235 | wc.status = IB_WC_LOC_QP_OP_ERR; |
3236 | goto err; | |
3237 | ||
3238 | acc_err: | |
3239 | send_status = IB_WC_REM_ACCESS_ERR; | |
3240 | wc.status = IB_WC_LOC_PROT_ERR; | |
3241 | err: | |
3242 | /* responder goes to error state */ | |
3243 | rvt_rc_error(qp, wc.status); | |
3244 | ||
3245 | serr: | |
d757c60e MR |
3246 | spin_unlock_irqrestore(&qp->r_lock, flags); |
3247 | serr_no_r_lock: | |
15703461 VSD |
3248 | spin_lock_irqsave(&sqp->s_lock, flags); |
3249 | rvt_send_complete(sqp, wqe, send_status); | |
3250 | if (sqp->ibqp.qp_type == IB_QPT_RC) { | |
3251 | int lastwqe = rvt_error_qp(sqp, IB_WC_WR_FLUSH_ERR); | |
3252 | ||
3253 | sqp->s_flags &= ~RVT_S_BUSY; | |
3254 | spin_unlock_irqrestore(&sqp->s_lock, flags); | |
3255 | if (lastwqe) { | |
3256 | struct ib_event ev; | |
3257 | ||
3258 | ev.device = sqp->ibqp.device; | |
3259 | ev.element.qp = &sqp->ibqp; | |
3260 | ev.event = IB_EVENT_QP_LAST_WQE_REACHED; | |
3261 | sqp->ibqp.event_handler(&ev, sqp->ibqp.qp_context); | |
3262 | } | |
3263 | goto done; | |
3264 | } | |
3265 | clr_busy: | |
3266 | sqp->s_flags &= ~RVT_S_BUSY; | |
3267 | unlock: | |
3268 | spin_unlock_irqrestore(&sqp->s_lock, flags); | |
3269 | done: | |
3270 | rcu_read_unlock(); | |
3271 | } | |
3272 | EXPORT_SYMBOL(rvt_ruc_loopback); |