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1586ecce13c719b1eaddfb43f0d96d80e27b6389
[deliverable/linux.git] / drivers / net / ethernet / mellanox / mlx4 / qp.c
1 /*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc. All rights reserved.
4 * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
5 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 */
35
36 #include <linux/gfp.h>
37 #include <linux/export.h>
38
39 #include <linux/mlx4/cmd.h>
40 #include <linux/mlx4/qp.h>
41
42 #include "mlx4.h"
43 #include "icm.h"
44
45 /* QP to support BF should have bits 6,7 cleared */
46 #define MLX4_BF_QP_SKIP_MASK 0xc0
47 #define MLX4_MAX_BF_QP_RANGE 0x40
48
49 void mlx4_qp_event(struct mlx4_dev *dev, u32 qpn, int event_type)
50 {
51 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
52 struct mlx4_qp *qp;
53
54 spin_lock(&qp_table->lock);
55
56 qp = __mlx4_qp_lookup(dev, qpn);
57 if (qp)
58 atomic_inc(&qp->refcount);
59
60 spin_unlock(&qp_table->lock);
61
62 if (!qp) {
63 mlx4_dbg(dev, "Async event for none existent QP %08x\n", qpn);
64 return;
65 }
66
67 qp->event(qp, event_type);
68
69 if (atomic_dec_and_test(&qp->refcount))
70 complete(&qp->free);
71 }
72
73 /* used for INIT/CLOSE port logic */
74 static int is_master_qp0(struct mlx4_dev *dev, struct mlx4_qp *qp, int *real_qp0, int *proxy_qp0)
75 {
76 /* this procedure is called after we already know we are on the master */
77 /* qp0 is either the proxy qp0, or the real qp0 */
78 u32 pf_proxy_offset = dev->phys_caps.base_proxy_sqpn + 8 * mlx4_master_func_num(dev);
79 *proxy_qp0 = qp->qpn >= pf_proxy_offset && qp->qpn <= pf_proxy_offset + 1;
80
81 *real_qp0 = qp->qpn >= dev->phys_caps.base_sqpn &&
82 qp->qpn <= dev->phys_caps.base_sqpn + 1;
83
84 return *real_qp0 || *proxy_qp0;
85 }
86
87 static int __mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
88 enum mlx4_qp_state cur_state, enum mlx4_qp_state new_state,
89 struct mlx4_qp_context *context,
90 enum mlx4_qp_optpar optpar,
91 int sqd_event, struct mlx4_qp *qp, int native)
92 {
93 static const u16 op[MLX4_QP_NUM_STATE][MLX4_QP_NUM_STATE] = {
94 [MLX4_QP_STATE_RST] = {
95 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
96 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
97 [MLX4_QP_STATE_INIT] = MLX4_CMD_RST2INIT_QP,
98 },
99 [MLX4_QP_STATE_INIT] = {
100 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
101 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
102 [MLX4_QP_STATE_INIT] = MLX4_CMD_INIT2INIT_QP,
103 [MLX4_QP_STATE_RTR] = MLX4_CMD_INIT2RTR_QP,
104 },
105 [MLX4_QP_STATE_RTR] = {
106 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
107 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
108 [MLX4_QP_STATE_RTS] = MLX4_CMD_RTR2RTS_QP,
109 },
110 [MLX4_QP_STATE_RTS] = {
111 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
112 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
113 [MLX4_QP_STATE_RTS] = MLX4_CMD_RTS2RTS_QP,
114 [MLX4_QP_STATE_SQD] = MLX4_CMD_RTS2SQD_QP,
115 },
116 [MLX4_QP_STATE_SQD] = {
117 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
118 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
119 [MLX4_QP_STATE_RTS] = MLX4_CMD_SQD2RTS_QP,
120 [MLX4_QP_STATE_SQD] = MLX4_CMD_SQD2SQD_QP,
121 },
122 [MLX4_QP_STATE_SQER] = {
123 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
124 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
125 [MLX4_QP_STATE_RTS] = MLX4_CMD_SQERR2RTS_QP,
126 },
127 [MLX4_QP_STATE_ERR] = {
128 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
129 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
130 }
131 };
132
133 struct mlx4_priv *priv = mlx4_priv(dev);
134 struct mlx4_cmd_mailbox *mailbox;
135 int ret = 0;
136 int real_qp0 = 0;
137 int proxy_qp0 = 0;
138 u8 port;
139
140 if (cur_state >= MLX4_QP_NUM_STATE || new_state >= MLX4_QP_NUM_STATE ||
141 !op[cur_state][new_state])
142 return -EINVAL;
143
144 if (op[cur_state][new_state] == MLX4_CMD_2RST_QP) {
145 ret = mlx4_cmd(dev, 0, qp->qpn, 2,
146 MLX4_CMD_2RST_QP, MLX4_CMD_TIME_CLASS_A, native);
147 if (mlx4_is_master(dev) && cur_state != MLX4_QP_STATE_ERR &&
148 cur_state != MLX4_QP_STATE_RST &&
149 is_master_qp0(dev, qp, &real_qp0, &proxy_qp0)) {
150 port = (qp->qpn & 1) + 1;
151 if (proxy_qp0)
152 priv->mfunc.master.qp0_state[port].proxy_qp0_active = 0;
153 else
154 priv->mfunc.master.qp0_state[port].qp0_active = 0;
155 }
156 return ret;
157 }
158
159 mailbox = mlx4_alloc_cmd_mailbox(dev);
160 if (IS_ERR(mailbox))
161 return PTR_ERR(mailbox);
162
163 if (cur_state == MLX4_QP_STATE_RST && new_state == MLX4_QP_STATE_INIT) {
164 u64 mtt_addr = mlx4_mtt_addr(dev, mtt);
165 context->mtt_base_addr_h = mtt_addr >> 32;
166 context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
167 context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
168 }
169
170 *(__be32 *) mailbox->buf = cpu_to_be32(optpar);
171 memcpy(mailbox->buf + 8, context, sizeof *context);
172
173 ((struct mlx4_qp_context *) (mailbox->buf + 8))->local_qpn =
174 cpu_to_be32(qp->qpn);
175
176 ret = mlx4_cmd(dev, mailbox->dma,
177 qp->qpn | (!!sqd_event << 31),
178 new_state == MLX4_QP_STATE_RST ? 2 : 0,
179 op[cur_state][new_state], MLX4_CMD_TIME_CLASS_C, native);
180
181 if (mlx4_is_master(dev) && is_master_qp0(dev, qp, &real_qp0, &proxy_qp0)) {
182 port = (qp->qpn & 1) + 1;
183 if (cur_state != MLX4_QP_STATE_ERR &&
184 cur_state != MLX4_QP_STATE_RST &&
185 new_state == MLX4_QP_STATE_ERR) {
186 if (proxy_qp0)
187 priv->mfunc.master.qp0_state[port].proxy_qp0_active = 0;
188 else
189 priv->mfunc.master.qp0_state[port].qp0_active = 0;
190 } else if (new_state == MLX4_QP_STATE_RTR) {
191 if (proxy_qp0)
192 priv->mfunc.master.qp0_state[port].proxy_qp0_active = 1;
193 else
194 priv->mfunc.master.qp0_state[port].qp0_active = 1;
195 }
196 }
197
198 mlx4_free_cmd_mailbox(dev, mailbox);
199 return ret;
200 }
201
202 int mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
203 enum mlx4_qp_state cur_state, enum mlx4_qp_state new_state,
204 struct mlx4_qp_context *context,
205 enum mlx4_qp_optpar optpar,
206 int sqd_event, struct mlx4_qp *qp)
207 {
208 return __mlx4_qp_modify(dev, mtt, cur_state, new_state, context,
209 optpar, sqd_event, qp, 0);
210 }
211 EXPORT_SYMBOL_GPL(mlx4_qp_modify);
212
213 int __mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align,
214 int *base, u8 flags)
215 {
216 u32 uid;
217 int bf_qp = !!(flags & (u8)MLX4_RESERVE_ETH_BF_QP);
218
219 struct mlx4_priv *priv = mlx4_priv(dev);
220 struct mlx4_qp_table *qp_table = &priv->qp_table;
221
222 if (cnt > MLX4_MAX_BF_QP_RANGE && bf_qp)
223 return -ENOMEM;
224
225 uid = MLX4_QP_TABLE_ZONE_GENERAL;
226 if (flags & (u8)MLX4_RESERVE_A0_QP) {
227 if (bf_qp)
228 uid = MLX4_QP_TABLE_ZONE_RAW_ETH;
229 else
230 uid = MLX4_QP_TABLE_ZONE_RSS;
231 }
232
233 *base = mlx4_zone_alloc_entries(qp_table->zones, uid, cnt, align,
234 bf_qp ? MLX4_BF_QP_SKIP_MASK : 0, NULL);
235 if (*base == -1)
236 return -ENOMEM;
237
238 return 0;
239 }
240
241 int mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align,
242 int *base, u8 flags)
243 {
244 u64 in_param = 0;
245 u64 out_param;
246 int err;
247
248 /* Turn off all unsupported QP allocation flags */
249 flags &= dev->caps.alloc_res_qp_mask;
250
251 if (mlx4_is_mfunc(dev)) {
252 set_param_l(&in_param, (((u32)flags) << 24) | (u32)cnt);
253 set_param_h(&in_param, align);
254 err = mlx4_cmd_imm(dev, in_param, &out_param,
255 RES_QP, RES_OP_RESERVE,
256 MLX4_CMD_ALLOC_RES,
257 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
258 if (err)
259 return err;
260
261 *base = get_param_l(&out_param);
262 return 0;
263 }
264 return __mlx4_qp_reserve_range(dev, cnt, align, base, flags);
265 }
266 EXPORT_SYMBOL_GPL(mlx4_qp_reserve_range);
267
268 void __mlx4_qp_release_range(struct mlx4_dev *dev, int base_qpn, int cnt)
269 {
270 struct mlx4_priv *priv = mlx4_priv(dev);
271 struct mlx4_qp_table *qp_table = &priv->qp_table;
272
273 if (mlx4_is_qp_reserved(dev, (u32) base_qpn))
274 return;
275 mlx4_zone_free_entries_unique(qp_table->zones, base_qpn, cnt);
276 }
277
278 void mlx4_qp_release_range(struct mlx4_dev *dev, int base_qpn, int cnt)
279 {
280 u64 in_param = 0;
281 int err;
282
283 if (mlx4_is_mfunc(dev)) {
284 set_param_l(&in_param, base_qpn);
285 set_param_h(&in_param, cnt);
286 err = mlx4_cmd(dev, in_param, RES_QP, RES_OP_RESERVE,
287 MLX4_CMD_FREE_RES,
288 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
289 if (err) {
290 mlx4_warn(dev, "Failed to release qp range base:%d cnt:%d\n",
291 base_qpn, cnt);
292 }
293 } else
294 __mlx4_qp_release_range(dev, base_qpn, cnt);
295 }
296 EXPORT_SYMBOL_GPL(mlx4_qp_release_range);
297
298 int __mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn, gfp_t gfp)
299 {
300 struct mlx4_priv *priv = mlx4_priv(dev);
301 struct mlx4_qp_table *qp_table = &priv->qp_table;
302 int err;
303
304 err = mlx4_table_get(dev, &qp_table->qp_table, qpn, gfp);
305 if (err)
306 goto err_out;
307
308 err = mlx4_table_get(dev, &qp_table->auxc_table, qpn, gfp);
309 if (err)
310 goto err_put_qp;
311
312 err = mlx4_table_get(dev, &qp_table->altc_table, qpn, gfp);
313 if (err)
314 goto err_put_auxc;
315
316 err = mlx4_table_get(dev, &qp_table->rdmarc_table, qpn, gfp);
317 if (err)
318 goto err_put_altc;
319
320 err = mlx4_table_get(dev, &qp_table->cmpt_table, qpn, gfp);
321 if (err)
322 goto err_put_rdmarc;
323
324 return 0;
325
326 err_put_rdmarc:
327 mlx4_table_put(dev, &qp_table->rdmarc_table, qpn);
328
329 err_put_altc:
330 mlx4_table_put(dev, &qp_table->altc_table, qpn);
331
332 err_put_auxc:
333 mlx4_table_put(dev, &qp_table->auxc_table, qpn);
334
335 err_put_qp:
336 mlx4_table_put(dev, &qp_table->qp_table, qpn);
337
338 err_out:
339 return err;
340 }
341
342 static int mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn, gfp_t gfp)
343 {
344 u64 param = 0;
345
346 if (mlx4_is_mfunc(dev)) {
347 set_param_l(&param, qpn);
348 return mlx4_cmd_imm(dev, param, &param, RES_QP, RES_OP_MAP_ICM,
349 MLX4_CMD_ALLOC_RES, MLX4_CMD_TIME_CLASS_A,
350 MLX4_CMD_WRAPPED);
351 }
352 return __mlx4_qp_alloc_icm(dev, qpn, gfp);
353 }
354
355 void __mlx4_qp_free_icm(struct mlx4_dev *dev, int qpn)
356 {
357 struct mlx4_priv *priv = mlx4_priv(dev);
358 struct mlx4_qp_table *qp_table = &priv->qp_table;
359
360 mlx4_table_put(dev, &qp_table->cmpt_table, qpn);
361 mlx4_table_put(dev, &qp_table->rdmarc_table, qpn);
362 mlx4_table_put(dev, &qp_table->altc_table, qpn);
363 mlx4_table_put(dev, &qp_table->auxc_table, qpn);
364 mlx4_table_put(dev, &qp_table->qp_table, qpn);
365 }
366
367 static void mlx4_qp_free_icm(struct mlx4_dev *dev, int qpn)
368 {
369 u64 in_param = 0;
370
371 if (mlx4_is_mfunc(dev)) {
372 set_param_l(&in_param, qpn);
373 if (mlx4_cmd(dev, in_param, RES_QP, RES_OP_MAP_ICM,
374 MLX4_CMD_FREE_RES, MLX4_CMD_TIME_CLASS_A,
375 MLX4_CMD_WRAPPED))
376 mlx4_warn(dev, "Failed to free icm of qp:%d\n", qpn);
377 } else
378 __mlx4_qp_free_icm(dev, qpn);
379 }
380
381 int mlx4_qp_alloc(struct mlx4_dev *dev, int qpn, struct mlx4_qp *qp, gfp_t gfp)
382 {
383 struct mlx4_priv *priv = mlx4_priv(dev);
384 struct mlx4_qp_table *qp_table = &priv->qp_table;
385 int err;
386
387 if (!qpn)
388 return -EINVAL;
389
390 qp->qpn = qpn;
391
392 err = mlx4_qp_alloc_icm(dev, qpn, gfp);
393 if (err)
394 return err;
395
396 spin_lock_irq(&qp_table->lock);
397 err = radix_tree_insert(&dev->qp_table_tree, qp->qpn &
398 (dev->caps.num_qps - 1), qp);
399 spin_unlock_irq(&qp_table->lock);
400 if (err)
401 goto err_icm;
402
403 atomic_set(&qp->refcount, 1);
404 init_completion(&qp->free);
405
406 return 0;
407
408 err_icm:
409 mlx4_qp_free_icm(dev, qpn);
410 return err;
411 }
412
413 EXPORT_SYMBOL_GPL(mlx4_qp_alloc);
414
415 #define MLX4_UPDATE_QP_SUPPORTED_ATTRS MLX4_UPDATE_QP_SMAC
416 int mlx4_update_qp(struct mlx4_dev *dev, u32 qpn,
417 enum mlx4_update_qp_attr attr,
418 struct mlx4_update_qp_params *params)
419 {
420 struct mlx4_cmd_mailbox *mailbox;
421 struct mlx4_update_qp_context *cmd;
422 u64 pri_addr_path_mask = 0;
423 u64 qp_mask = 0;
424 int err = 0;
425
426 mailbox = mlx4_alloc_cmd_mailbox(dev);
427 if (IS_ERR(mailbox))
428 return PTR_ERR(mailbox);
429
430 cmd = (struct mlx4_update_qp_context *)mailbox->buf;
431
432 if (!attr || (attr & ~MLX4_UPDATE_QP_SUPPORTED_ATTRS))
433 return -EINVAL;
434
435 if (attr & MLX4_UPDATE_QP_SMAC) {
436 pri_addr_path_mask |= 1ULL << MLX4_UPD_QP_PATH_MASK_MAC_INDEX;
437 cmd->qp_context.pri_path.grh_mylmc = params->smac_index;
438 }
439
440 if (attr & MLX4_UPDATE_QP_VSD) {
441 qp_mask |= 1ULL << MLX4_UPD_QP_MASK_VSD;
442 if (params->flags & MLX4_UPDATE_QP_PARAMS_FLAGS_VSD_ENABLE)
443 cmd->qp_context.param3 |= cpu_to_be32(MLX4_STRIP_VLAN);
444 }
445
446 cmd->primary_addr_path_mask = cpu_to_be64(pri_addr_path_mask);
447 cmd->qp_mask = cpu_to_be64(qp_mask);
448
449 err = mlx4_cmd(dev, mailbox->dma, qpn & 0xffffff, 0,
450 MLX4_CMD_UPDATE_QP, MLX4_CMD_TIME_CLASS_A,
451 MLX4_CMD_NATIVE);
452
453 mlx4_free_cmd_mailbox(dev, mailbox);
454 return err;
455 }
456 EXPORT_SYMBOL_GPL(mlx4_update_qp);
457
458 void mlx4_qp_remove(struct mlx4_dev *dev, struct mlx4_qp *qp)
459 {
460 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
461 unsigned long flags;
462
463 spin_lock_irqsave(&qp_table->lock, flags);
464 radix_tree_delete(&dev->qp_table_tree, qp->qpn & (dev->caps.num_qps - 1));
465 spin_unlock_irqrestore(&qp_table->lock, flags);
466 }
467 EXPORT_SYMBOL_GPL(mlx4_qp_remove);
468
469 void mlx4_qp_free(struct mlx4_dev *dev, struct mlx4_qp *qp)
470 {
471 if (atomic_dec_and_test(&qp->refcount))
472 complete(&qp->free);
473 wait_for_completion(&qp->free);
474
475 mlx4_qp_free_icm(dev, qp->qpn);
476 }
477 EXPORT_SYMBOL_GPL(mlx4_qp_free);
478
479 static int mlx4_CONF_SPECIAL_QP(struct mlx4_dev *dev, u32 base_qpn)
480 {
481 return mlx4_cmd(dev, 0, base_qpn, 0, MLX4_CMD_CONF_SPECIAL_QP,
482 MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
483 }
484
485 #define MLX4_QP_TABLE_RSS_ETH_PRIORITY 2
486 #define MLX4_QP_TABLE_RAW_ETH_PRIORITY 1
487 #define MLX4_QP_TABLE_RAW_ETH_SIZE 256
488
489 static int mlx4_create_zones(struct mlx4_dev *dev,
490 u32 reserved_bottom_general,
491 u32 reserved_top_general,
492 u32 reserved_bottom_rss,
493 u32 start_offset_rss,
494 u32 max_table_offset)
495 {
496 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
497 struct mlx4_bitmap (*bitmap)[MLX4_QP_TABLE_ZONE_NUM] = NULL;
498 int bitmap_initialized = 0;
499 u32 last_offset;
500 int k;
501 int err;
502
503 qp_table->zones = mlx4_zone_allocator_create(MLX4_ZONE_ALLOC_FLAGS_NO_OVERLAP);
504
505 if (NULL == qp_table->zones)
506 return -ENOMEM;
507
508 bitmap = kmalloc(sizeof(*bitmap), GFP_KERNEL);
509
510 if (NULL == bitmap) {
511 err = -ENOMEM;
512 goto free_zone;
513 }
514
515 err = mlx4_bitmap_init(*bitmap + MLX4_QP_TABLE_ZONE_GENERAL, dev->caps.num_qps,
516 (1 << 23) - 1, reserved_bottom_general,
517 reserved_top_general);
518
519 if (err)
520 goto free_bitmap;
521
522 ++bitmap_initialized;
523
524 err = mlx4_zone_add_one(qp_table->zones, *bitmap + MLX4_QP_TABLE_ZONE_GENERAL,
525 MLX4_ZONE_FALLBACK_TO_HIGHER_PRIO |
526 MLX4_ZONE_USE_RR, 0,
527 0, qp_table->zones_uids + MLX4_QP_TABLE_ZONE_GENERAL);
528
529 if (err)
530 goto free_bitmap;
531
532 err = mlx4_bitmap_init(*bitmap + MLX4_QP_TABLE_ZONE_RSS,
533 reserved_bottom_rss,
534 reserved_bottom_rss - 1,
535 dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW],
536 reserved_bottom_rss - start_offset_rss);
537
538 if (err)
539 goto free_bitmap;
540
541 ++bitmap_initialized;
542
543 err = mlx4_zone_add_one(qp_table->zones, *bitmap + MLX4_QP_TABLE_ZONE_RSS,
544 MLX4_ZONE_ALLOW_ALLOC_FROM_LOWER_PRIO |
545 MLX4_ZONE_ALLOW_ALLOC_FROM_EQ_PRIO |
546 MLX4_ZONE_USE_RR, MLX4_QP_TABLE_RSS_ETH_PRIORITY,
547 0, qp_table->zones_uids + MLX4_QP_TABLE_ZONE_RSS);
548
549 if (err)
550 goto free_bitmap;
551
552 last_offset = dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW];
553 /* We have a single zone for the A0 steering QPs area of the FW. This area
554 * needs to be split into subareas. One set of subareas is for RSS QPs
555 * (in which qp number bits 6 and/or 7 are set); the other set of subareas
556 * is for RAW_ETH QPs, which require that both bits 6 and 7 are zero.
557 * Currently, the values returned by the FW (A0 steering area starting qp number
558 * and A0 steering area size) are such that there are only two subareas -- one
559 * for RSS and one for RAW_ETH.
560 */
561 for (k = MLX4_QP_TABLE_ZONE_RSS + 1; k < sizeof(*bitmap)/sizeof((*bitmap)[0]);
562 k++) {
563 int size;
564 u32 offset = start_offset_rss;
565 u32 bf_mask;
566 u32 requested_size;
567
568 /* Assuming MLX4_BF_QP_SKIP_MASK is consecutive ones, this calculates
569 * a mask of all LSB bits set until (and not including) the first
570 * set bit of MLX4_BF_QP_SKIP_MASK. For example, if MLX4_BF_QP_SKIP_MASK
571 * is 0xc0, bf_mask will be 0x3f.
572 */
573 bf_mask = (MLX4_BF_QP_SKIP_MASK & ~(MLX4_BF_QP_SKIP_MASK - 1)) - 1;
574 requested_size = min((u32)MLX4_QP_TABLE_RAW_ETH_SIZE, bf_mask + 1);
575
576 if (((last_offset & MLX4_BF_QP_SKIP_MASK) &&
577 ((int)(max_table_offset - last_offset)) >=
578 roundup_pow_of_two(MLX4_BF_QP_SKIP_MASK)) ||
579 (!(last_offset & MLX4_BF_QP_SKIP_MASK) &&
580 !((last_offset + requested_size - 1) &
581 MLX4_BF_QP_SKIP_MASK)))
582 size = requested_size;
583 else {
584 u32 candidate_offset =
585 (last_offset | MLX4_BF_QP_SKIP_MASK | bf_mask) + 1;
586
587 if (last_offset & MLX4_BF_QP_SKIP_MASK)
588 last_offset = candidate_offset;
589
590 /* From this point, the BF bits are 0 */
591
592 if (last_offset > max_table_offset) {
593 /* need to skip */
594 size = -1;
595 } else {
596 size = min3(max_table_offset - last_offset,
597 bf_mask - (last_offset & bf_mask),
598 requested_size);
599 if (size < requested_size) {
600 int candidate_size;
601
602 candidate_size = min3(
603 max_table_offset - candidate_offset,
604 bf_mask - (last_offset & bf_mask),
605 requested_size);
606
607 /* We will not take this path if last_offset was
608 * already set above to candidate_offset
609 */
610 if (candidate_size > size) {
611 last_offset = candidate_offset;
612 size = candidate_size;
613 }
614 }
615 }
616 }
617
618 if (size > 0) {
619 /* mlx4_bitmap_alloc_range will find a contiguous range of "size"
620 * QPs in which both bits 6 and 7 are zero, because we pass it the
621 * MLX4_BF_SKIP_MASK).
622 */
623 offset = mlx4_bitmap_alloc_range(
624 *bitmap + MLX4_QP_TABLE_ZONE_RSS,
625 size, 1,
626 MLX4_BF_QP_SKIP_MASK);
627
628 if (offset == (u32)-1) {
629 err = -ENOMEM;
630 break;
631 }
632
633 last_offset = offset + size;
634
635 err = mlx4_bitmap_init(*bitmap + k, roundup_pow_of_two(size),
636 roundup_pow_of_two(size) - 1, 0,
637 roundup_pow_of_two(size) - size);
638 } else {
639 /* Add an empty bitmap, we'll allocate from different zones (since
640 * at least one is reserved)
641 */
642 err = mlx4_bitmap_init(*bitmap + k, 1,
643 MLX4_QP_TABLE_RAW_ETH_SIZE - 1, 0,
644 0);
645 mlx4_bitmap_alloc_range(*bitmap + k, 1, 1, 0);
646 }
647
648 if (err)
649 break;
650
651 ++bitmap_initialized;
652
653 err = mlx4_zone_add_one(qp_table->zones, *bitmap + k,
654 MLX4_ZONE_ALLOW_ALLOC_FROM_LOWER_PRIO |
655 MLX4_ZONE_ALLOW_ALLOC_FROM_EQ_PRIO |
656 MLX4_ZONE_USE_RR, MLX4_QP_TABLE_RAW_ETH_PRIORITY,
657 offset, qp_table->zones_uids + k);
658
659 if (err)
660 break;
661 }
662
663 if (err)
664 goto free_bitmap;
665
666 qp_table->bitmap_gen = *bitmap;
667
668 return err;
669
670 free_bitmap:
671 for (k = 0; k < bitmap_initialized; k++)
672 mlx4_bitmap_cleanup(*bitmap + k);
673 kfree(bitmap);
674 free_zone:
675 mlx4_zone_allocator_destroy(qp_table->zones);
676 return err;
677 }
678
679 static void mlx4_cleanup_qp_zones(struct mlx4_dev *dev)
680 {
681 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
682
683 if (qp_table->zones) {
684 int i;
685
686 for (i = 0;
687 i < sizeof(qp_table->zones_uids)/sizeof(qp_table->zones_uids[0]);
688 i++) {
689 struct mlx4_bitmap *bitmap =
690 mlx4_zone_get_bitmap(qp_table->zones,
691 qp_table->zones_uids[i]);
692
693 mlx4_zone_remove_one(qp_table->zones, qp_table->zones_uids[i]);
694 if (NULL == bitmap)
695 continue;
696
697 mlx4_bitmap_cleanup(bitmap);
698 }
699 mlx4_zone_allocator_destroy(qp_table->zones);
700 kfree(qp_table->bitmap_gen);
701 qp_table->bitmap_gen = NULL;
702 qp_table->zones = NULL;
703 }
704 }
705
706 int mlx4_init_qp_table(struct mlx4_dev *dev)
707 {
708 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
709 int err;
710 int reserved_from_top = 0;
711 int reserved_from_bot;
712 int k;
713 int fixed_reserved_from_bot_rv = 0;
714 int bottom_reserved_for_rss_bitmap;
715 u32 max_table_offset = dev->caps.dmfs_high_rate_qpn_base +
716 dev->caps.dmfs_high_rate_qpn_range;
717
718 spin_lock_init(&qp_table->lock);
719 INIT_RADIX_TREE(&dev->qp_table_tree, GFP_ATOMIC);
720 if (mlx4_is_slave(dev))
721 return 0;
722
723 /* We reserve 2 extra QPs per port for the special QPs. The
724 * block of special QPs must be aligned to a multiple of 8, so
725 * round up.
726 *
727 * We also reserve the MSB of the 24-bit QP number to indicate
728 * that a QP is an XRC QP.
729 */
730 for (k = 0; k <= MLX4_QP_REGION_BOTTOM; k++)
731 fixed_reserved_from_bot_rv += dev->caps.reserved_qps_cnt[k];
732
733 if (fixed_reserved_from_bot_rv < max_table_offset)
734 fixed_reserved_from_bot_rv = max_table_offset;
735
736 /* We reserve at least 1 extra for bitmaps that we don't have enough space for*/
737 bottom_reserved_for_rss_bitmap =
738 roundup_pow_of_two(fixed_reserved_from_bot_rv + 1);
739 dev->phys_caps.base_sqpn = ALIGN(bottom_reserved_for_rss_bitmap, 8);
740
741 {
742 int sort[MLX4_NUM_QP_REGION];
743 int i, j, tmp;
744 int last_base = dev->caps.num_qps;
745
746 for (i = 1; i < MLX4_NUM_QP_REGION; ++i)
747 sort[i] = i;
748
749 for (i = MLX4_NUM_QP_REGION; i > MLX4_QP_REGION_BOTTOM; --i) {
750 for (j = MLX4_QP_REGION_BOTTOM + 2; j < i; ++j) {
751 if (dev->caps.reserved_qps_cnt[sort[j]] >
752 dev->caps.reserved_qps_cnt[sort[j - 1]]) {
753 tmp = sort[j];
754 sort[j] = sort[j - 1];
755 sort[j - 1] = tmp;
756 }
757 }
758 }
759
760 for (i = MLX4_QP_REGION_BOTTOM + 1; i < MLX4_NUM_QP_REGION; ++i) {
761 last_base -= dev->caps.reserved_qps_cnt[sort[i]];
762 dev->caps.reserved_qps_base[sort[i]] = last_base;
763 reserved_from_top +=
764 dev->caps.reserved_qps_cnt[sort[i]];
765 }
766 }
767
768 /* Reserve 8 real SQPs in both native and SRIOV modes.
769 * In addition, in SRIOV mode, reserve 8 proxy SQPs per function
770 * (for all PFs and VFs), and 8 corresponding tunnel QPs.
771 * Each proxy SQP works opposite its own tunnel QP.
772 *
773 * The QPs are arranged as follows:
774 * a. 8 real SQPs
775 * b. All the proxy SQPs (8 per function)
776 * c. All the tunnel QPs (8 per function)
777 */
778 reserved_from_bot = mlx4_num_reserved_sqps(dev);
779 if (reserved_from_bot + reserved_from_top > dev->caps.num_qps) {
780 mlx4_err(dev, "Number of reserved QPs is higher than number of QPs\n");
781 return -EINVAL;
782 }
783
784 err = mlx4_create_zones(dev, reserved_from_bot, reserved_from_bot,
785 bottom_reserved_for_rss_bitmap,
786 fixed_reserved_from_bot_rv,
787 max_table_offset);
788
789 if (err)
790 return err;
791
792 if (mlx4_is_mfunc(dev)) {
793 /* for PPF use */
794 dev->phys_caps.base_proxy_sqpn = dev->phys_caps.base_sqpn + 8;
795 dev->phys_caps.base_tunnel_sqpn = dev->phys_caps.base_sqpn + 8 + 8 * MLX4_MFUNC_MAX;
796
797 /* In mfunc, calculate proxy and tunnel qp offsets for the PF here,
798 * since the PF does not call mlx4_slave_caps */
799 dev->caps.qp0_tunnel = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL);
800 dev->caps.qp0_proxy = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL);
801 dev->caps.qp1_tunnel = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL);
802 dev->caps.qp1_proxy = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL);
803
804 if (!dev->caps.qp0_tunnel || !dev->caps.qp0_proxy ||
805 !dev->caps.qp1_tunnel || !dev->caps.qp1_proxy) {
806 err = -ENOMEM;
807 goto err_mem;
808 }
809
810 for (k = 0; k < dev->caps.num_ports; k++) {
811 dev->caps.qp0_proxy[k] = dev->phys_caps.base_proxy_sqpn +
812 8 * mlx4_master_func_num(dev) + k;
813 dev->caps.qp0_tunnel[k] = dev->caps.qp0_proxy[k] + 8 * MLX4_MFUNC_MAX;
814 dev->caps.qp1_proxy[k] = dev->phys_caps.base_proxy_sqpn +
815 8 * mlx4_master_func_num(dev) + MLX4_MAX_PORTS + k;
816 dev->caps.qp1_tunnel[k] = dev->caps.qp1_proxy[k] + 8 * MLX4_MFUNC_MAX;
817 }
818 }
819
820
821 err = mlx4_CONF_SPECIAL_QP(dev, dev->phys_caps.base_sqpn);
822 if (err)
823 goto err_mem;
824
825 return err;
826
827 err_mem:
828 kfree(dev->caps.qp0_tunnel);
829 kfree(dev->caps.qp0_proxy);
830 kfree(dev->caps.qp1_tunnel);
831 kfree(dev->caps.qp1_proxy);
832 dev->caps.qp0_tunnel = dev->caps.qp0_proxy =
833 dev->caps.qp1_tunnel = dev->caps.qp1_proxy = NULL;
834 mlx4_cleanup_qp_zones(dev);
835 return err;
836 }
837
838 void mlx4_cleanup_qp_table(struct mlx4_dev *dev)
839 {
840 if (mlx4_is_slave(dev))
841 return;
842
843 mlx4_CONF_SPECIAL_QP(dev, 0);
844
845 mlx4_cleanup_qp_zones(dev);
846 }
847
848 int mlx4_qp_query(struct mlx4_dev *dev, struct mlx4_qp *qp,
849 struct mlx4_qp_context *context)
850 {
851 struct mlx4_cmd_mailbox *mailbox;
852 int err;
853
854 mailbox = mlx4_alloc_cmd_mailbox(dev);
855 if (IS_ERR(mailbox))
856 return PTR_ERR(mailbox);
857
858 err = mlx4_cmd_box(dev, 0, mailbox->dma, qp->qpn, 0,
859 MLX4_CMD_QUERY_QP, MLX4_CMD_TIME_CLASS_A,
860 MLX4_CMD_WRAPPED);
861 if (!err)
862 memcpy(context, mailbox->buf + 8, sizeof *context);
863
864 mlx4_free_cmd_mailbox(dev, mailbox);
865 return err;
866 }
867 EXPORT_SYMBOL_GPL(mlx4_qp_query);
868
869 int mlx4_qp_to_ready(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
870 struct mlx4_qp_context *context,
871 struct mlx4_qp *qp, enum mlx4_qp_state *qp_state)
872 {
873 int err;
874 int i;
875 enum mlx4_qp_state states[] = {
876 MLX4_QP_STATE_RST,
877 MLX4_QP_STATE_INIT,
878 MLX4_QP_STATE_RTR,
879 MLX4_QP_STATE_RTS
880 };
881
882 for (i = 0; i < ARRAY_SIZE(states) - 1; i++) {
883 context->flags &= cpu_to_be32(~(0xf << 28));
884 context->flags |= cpu_to_be32(states[i + 1] << 28);
885 err = mlx4_qp_modify(dev, mtt, states[i], states[i + 1],
886 context, 0, 0, qp);
887 if (err) {
888 mlx4_err(dev, "Failed to bring QP to state: %d with error: %d\n",
889 states[i + 1], err);
890 return err;
891 }
892
893 *qp_state = states[i + 1];
894 }
895
896 return 0;
897 }
898 EXPORT_SYMBOL_GPL(mlx4_qp_to_ready);
Linux kernel - Deliverables
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