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
49void mlx4_put_qp(struct mlx4_qp *qp)
50{
51 if (refcount_dec_and_test(r: &qp->refcount))
52 complete(&qp->free);
53}
54EXPORT_SYMBOL_GPL(mlx4_put_qp);
55
56void mlx4_qp_event(struct mlx4_dev *dev, u32 qpn, int event_type)
57{
58 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
59 struct mlx4_qp *qp;
60
61 spin_lock(lock: &qp_table->lock);
62
63 qp = __mlx4_qp_lookup(dev, qpn);
64 if (qp)
65 refcount_inc(r: &qp->refcount);
66
67 spin_unlock(lock: &qp_table->lock);
68
69 if (!qp) {
70 mlx4_dbg(dev, "Async event for none existent QP %08x\n", qpn);
71 return;
72 }
73
74 /* Need to call mlx4_put_qp() in event handler */
75 qp->event(qp, event_type);
76}
77
78/* used for INIT/CLOSE port logic */
79static int is_master_qp0(struct mlx4_dev *dev, struct mlx4_qp *qp, int *real_qp0, int *proxy_qp0)
80{
81 /* this procedure is called after we already know we are on the master */
82 /* qp0 is either the proxy qp0, or the real qp0 */
83 u32 pf_proxy_offset = dev->phys_caps.base_proxy_sqpn + 8 * mlx4_master_func_num(dev);
84 *proxy_qp0 = qp->qpn >= pf_proxy_offset && qp->qpn <= pf_proxy_offset + 1;
85
86 *real_qp0 = qp->qpn >= dev->phys_caps.base_sqpn &&
87 qp->qpn <= dev->phys_caps.base_sqpn + 1;
88
89 return *real_qp0 || *proxy_qp0;
90}
91
92static int __mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
93 enum mlx4_qp_state cur_state, enum mlx4_qp_state new_state,
94 struct mlx4_qp_context *context,
95 enum mlx4_qp_optpar optpar,
96 int sqd_event, struct mlx4_qp *qp, int native)
97{
98 static const u16 op[MLX4_QP_NUM_STATE][MLX4_QP_NUM_STATE] = {
99 [MLX4_QP_STATE_RST] = {
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_RST2INIT_QP,
103 },
104 [MLX4_QP_STATE_INIT] = {
105 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
106 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
107 [MLX4_QP_STATE_INIT] = MLX4_CMD_INIT2INIT_QP,
108 [MLX4_QP_STATE_RTR] = MLX4_CMD_INIT2RTR_QP,
109 },
110 [MLX4_QP_STATE_RTR] = {
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_RTR2RTS_QP,
114 },
115 [MLX4_QP_STATE_RTS] = {
116 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
117 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
118 [MLX4_QP_STATE_RTS] = MLX4_CMD_RTS2RTS_QP,
119 [MLX4_QP_STATE_SQD] = MLX4_CMD_RTS2SQD_QP,
120 },
121 [MLX4_QP_STATE_SQD] = {
122 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
123 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
124 [MLX4_QP_STATE_RTS] = MLX4_CMD_SQD2RTS_QP,
125 [MLX4_QP_STATE_SQD] = MLX4_CMD_SQD2SQD_QP,
126 },
127 [MLX4_QP_STATE_SQER] = {
128 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
129 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
130 [MLX4_QP_STATE_RTS] = MLX4_CMD_SQERR2RTS_QP,
131 },
132 [MLX4_QP_STATE_ERR] = {
133 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
134 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
135 }
136 };
137
138 struct mlx4_priv *priv = mlx4_priv(dev);
139 struct mlx4_cmd_mailbox *mailbox;
140 int ret = 0;
141 int real_qp0 = 0;
142 int proxy_qp0 = 0;
143 u8 port;
144
145 if (cur_state >= MLX4_QP_NUM_STATE || new_state >= MLX4_QP_NUM_STATE ||
146 !op[cur_state][new_state])
147 return -EINVAL;
148
149 if (op[cur_state][new_state] == MLX4_CMD_2RST_QP) {
150 ret = mlx4_cmd(dev, in_param: 0, in_modifier: qp->qpn, op_modifier: 2,
151 op: MLX4_CMD_2RST_QP, timeout: MLX4_CMD_TIME_CLASS_A, native);
152 if (mlx4_is_master(dev) && cur_state != MLX4_QP_STATE_ERR &&
153 cur_state != MLX4_QP_STATE_RST &&
154 is_master_qp0(dev, qp, real_qp0: &real_qp0, proxy_qp0: &proxy_qp0)) {
155 port = (qp->qpn & 1) + 1;
156 if (proxy_qp0)
157 priv->mfunc.master.qp0_state[port].proxy_qp0_active = 0;
158 else
159 priv->mfunc.master.qp0_state[port].qp0_active = 0;
160 }
161 return ret;
162 }
163
164 mailbox = mlx4_alloc_cmd_mailbox(dev);
165 if (IS_ERR(ptr: mailbox))
166 return PTR_ERR(ptr: mailbox);
167
168 if (cur_state == MLX4_QP_STATE_RST && new_state == MLX4_QP_STATE_INIT) {
169 u64 mtt_addr = mlx4_mtt_addr(dev, mtt);
170 context->mtt_base_addr_h = mtt_addr >> 32;
171 context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
172 context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
173 }
174
175 if ((cur_state == MLX4_QP_STATE_RTR) &&
176 (new_state == MLX4_QP_STATE_RTS) &&
177 dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_ROCE_V1_V2)
178 context->roce_entropy =
179 cpu_to_be16(mlx4_qp_roce_entropy(dev, qp->qpn));
180
181 *(__be32 *) mailbox->buf = cpu_to_be32(optpar);
182 memcpy(mailbox->buf + 8, context, sizeof(*context));
183
184 ((struct mlx4_qp_context *) (mailbox->buf + 8))->local_qpn =
185 cpu_to_be32(qp->qpn);
186
187 ret = mlx4_cmd(dev, in_param: mailbox->dma,
188 in_modifier: qp->qpn | (!!sqd_event << 31),
189 op_modifier: new_state == MLX4_QP_STATE_RST ? 2 : 0,
190 op: op[cur_state][new_state], timeout: MLX4_CMD_TIME_CLASS_C, native);
191
192 if (mlx4_is_master(dev) && is_master_qp0(dev, qp, real_qp0: &real_qp0, proxy_qp0: &proxy_qp0)) {
193 port = (qp->qpn & 1) + 1;
194 if (cur_state != MLX4_QP_STATE_ERR &&
195 cur_state != MLX4_QP_STATE_RST &&
196 new_state == MLX4_QP_STATE_ERR) {
197 if (proxy_qp0)
198 priv->mfunc.master.qp0_state[port].proxy_qp0_active = 0;
199 else
200 priv->mfunc.master.qp0_state[port].qp0_active = 0;
201 } else if (new_state == MLX4_QP_STATE_RTR) {
202 if (proxy_qp0)
203 priv->mfunc.master.qp0_state[port].proxy_qp0_active = 1;
204 else
205 priv->mfunc.master.qp0_state[port].qp0_active = 1;
206 }
207 }
208
209 mlx4_free_cmd_mailbox(dev, mailbox);
210 return ret;
211}
212
213int mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
214 enum mlx4_qp_state cur_state, enum mlx4_qp_state new_state,
215 struct mlx4_qp_context *context,
216 enum mlx4_qp_optpar optpar,
217 int sqd_event, struct mlx4_qp *qp)
218{
219 return __mlx4_qp_modify(dev, mtt, cur_state, new_state, context,
220 optpar, sqd_event, qp, native: 0);
221}
222EXPORT_SYMBOL_GPL(mlx4_qp_modify);
223
224int __mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align,
225 int *base, u8 flags)
226{
227 u32 uid;
228 int bf_qp = !!(flags & (u8)MLX4_RESERVE_ETH_BF_QP);
229
230 struct mlx4_priv *priv = mlx4_priv(dev);
231 struct mlx4_qp_table *qp_table = &priv->qp_table;
232
233 if (cnt > MLX4_MAX_BF_QP_RANGE && bf_qp)
234 return -ENOMEM;
235
236 uid = MLX4_QP_TABLE_ZONE_GENERAL;
237 if (flags & (u8)MLX4_RESERVE_A0_QP) {
238 if (bf_qp)
239 uid = MLX4_QP_TABLE_ZONE_RAW_ETH;
240 else
241 uid = MLX4_QP_TABLE_ZONE_RSS;
242 }
243
244 *base = mlx4_zone_alloc_entries(zones: qp_table->zones, uid, count: cnt, align,
245 skip_mask: bf_qp ? MLX4_BF_QP_SKIP_MASK : 0, NULL);
246 if (*base == -1)
247 return -ENOMEM;
248
249 return 0;
250}
251
252int mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align,
253 int *base, u8 flags, u8 usage)
254{
255 u32 in_modifier = RES_QP | (((u32)usage & 3) << 30);
256 u64 in_param = 0;
257 u64 out_param;
258 int err;
259
260 /* Turn off all unsupported QP allocation flags */
261 flags &= dev->caps.alloc_res_qp_mask;
262
263 if (mlx4_is_mfunc(dev)) {
264 set_param_l(arg: &in_param, val: (((u32)flags) << 24) | (u32)cnt);
265 set_param_h(arg: &in_param, val: align);
266 err = mlx4_cmd_imm(dev, in_param, out_param: &out_param,
267 in_modifier, op_modifier: RES_OP_RESERVE,
268 op: MLX4_CMD_ALLOC_RES,
269 timeout: MLX4_CMD_TIME_CLASS_A, native: MLX4_CMD_WRAPPED);
270 if (err)
271 return err;
272
273 *base = get_param_l(arg: &out_param);
274 return 0;
275 }
276 return __mlx4_qp_reserve_range(dev, cnt, align, base, flags);
277}
278EXPORT_SYMBOL_GPL(mlx4_qp_reserve_range);
279
280void __mlx4_qp_release_range(struct mlx4_dev *dev, int base_qpn, int cnt)
281{
282 struct mlx4_priv *priv = mlx4_priv(dev);
283 struct mlx4_qp_table *qp_table = &priv->qp_table;
284
285 if (mlx4_is_qp_reserved(dev, qpn: (u32) base_qpn))
286 return;
287 mlx4_zone_free_entries_unique(zones: qp_table->zones, obj: base_qpn, count: cnt);
288}
289
290void mlx4_qp_release_range(struct mlx4_dev *dev, int base_qpn, int cnt)
291{
292 u64 in_param = 0;
293 int err;
294
295 if (!cnt)
296 return;
297
298 if (mlx4_is_mfunc(dev)) {
299 set_param_l(arg: &in_param, val: base_qpn);
300 set_param_h(arg: &in_param, val: cnt);
301 err = mlx4_cmd(dev, in_param, in_modifier: RES_QP, op_modifier: RES_OP_RESERVE,
302 op: MLX4_CMD_FREE_RES,
303 timeout: MLX4_CMD_TIME_CLASS_A, native: MLX4_CMD_WRAPPED);
304 if (err) {
305 mlx4_warn(dev, "Failed to release qp range base:%d cnt:%d\n",
306 base_qpn, cnt);
307 }
308 } else
309 __mlx4_qp_release_range(dev, base_qpn, cnt);
310}
311EXPORT_SYMBOL_GPL(mlx4_qp_release_range);
312
313int __mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn)
314{
315 struct mlx4_priv *priv = mlx4_priv(dev);
316 struct mlx4_qp_table *qp_table = &priv->qp_table;
317 int err;
318
319 err = mlx4_table_get(dev, table: &qp_table->qp_table, obj: qpn);
320 if (err)
321 goto err_out;
322
323 err = mlx4_table_get(dev, table: &qp_table->auxc_table, obj: qpn);
324 if (err)
325 goto err_put_qp;
326
327 err = mlx4_table_get(dev, table: &qp_table->altc_table, obj: qpn);
328 if (err)
329 goto err_put_auxc;
330
331 err = mlx4_table_get(dev, table: &qp_table->rdmarc_table, obj: qpn);
332 if (err)
333 goto err_put_altc;
334
335 err = mlx4_table_get(dev, table: &qp_table->cmpt_table, obj: qpn);
336 if (err)
337 goto err_put_rdmarc;
338
339 return 0;
340
341err_put_rdmarc:
342 mlx4_table_put(dev, table: &qp_table->rdmarc_table, obj: qpn);
343
344err_put_altc:
345 mlx4_table_put(dev, table: &qp_table->altc_table, obj: qpn);
346
347err_put_auxc:
348 mlx4_table_put(dev, table: &qp_table->auxc_table, obj: qpn);
349
350err_put_qp:
351 mlx4_table_put(dev, table: &qp_table->qp_table, obj: qpn);
352
353err_out:
354 return err;
355}
356
357static int mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn)
358{
359 u64 param = 0;
360
361 if (mlx4_is_mfunc(dev)) {
362 set_param_l(arg: &param, val: qpn);
363 return mlx4_cmd_imm(dev, in_param: param, out_param: &param, in_modifier: RES_QP, op_modifier: RES_OP_MAP_ICM,
364 op: MLX4_CMD_ALLOC_RES, timeout: MLX4_CMD_TIME_CLASS_A,
365 native: MLX4_CMD_WRAPPED);
366 }
367 return __mlx4_qp_alloc_icm(dev, qpn);
368}
369
370void __mlx4_qp_free_icm(struct mlx4_dev *dev, int qpn)
371{
372 struct mlx4_priv *priv = mlx4_priv(dev);
373 struct mlx4_qp_table *qp_table = &priv->qp_table;
374
375 mlx4_table_put(dev, table: &qp_table->cmpt_table, obj: qpn);
376 mlx4_table_put(dev, table: &qp_table->rdmarc_table, obj: qpn);
377 mlx4_table_put(dev, table: &qp_table->altc_table, obj: qpn);
378 mlx4_table_put(dev, table: &qp_table->auxc_table, obj: qpn);
379 mlx4_table_put(dev, table: &qp_table->qp_table, obj: qpn);
380}
381
382static void mlx4_qp_free_icm(struct mlx4_dev *dev, int qpn)
383{
384 u64 in_param = 0;
385
386 if (mlx4_is_mfunc(dev)) {
387 set_param_l(arg: &in_param, val: qpn);
388 if (mlx4_cmd(dev, in_param, in_modifier: RES_QP, op_modifier: RES_OP_MAP_ICM,
389 op: MLX4_CMD_FREE_RES, timeout: MLX4_CMD_TIME_CLASS_A,
390 native: MLX4_CMD_WRAPPED))
391 mlx4_warn(dev, "Failed to free icm of qp:%d\n", qpn);
392 } else
393 __mlx4_qp_free_icm(dev, qpn);
394}
395
396struct mlx4_qp *mlx4_qp_lookup(struct mlx4_dev *dev, u32 qpn)
397{
398 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
399 struct mlx4_qp *qp;
400
401 spin_lock_irq(lock: &qp_table->lock);
402
403 qp = __mlx4_qp_lookup(dev, qpn);
404
405 spin_unlock_irq(lock: &qp_table->lock);
406 return qp;
407}
408
409int mlx4_qp_alloc(struct mlx4_dev *dev, int qpn, struct mlx4_qp *qp)
410{
411 struct mlx4_priv *priv = mlx4_priv(dev);
412 struct mlx4_qp_table *qp_table = &priv->qp_table;
413 int err;
414
415 if (!qpn)
416 return -EINVAL;
417
418 qp->qpn = qpn;
419
420 err = mlx4_qp_alloc_icm(dev, qpn);
421 if (err)
422 return err;
423
424 spin_lock_irq(lock: &qp_table->lock);
425 err = radix_tree_insert(&dev->qp_table_tree, index: qp->qpn &
426 (dev->caps.num_qps - 1), qp);
427 spin_unlock_irq(lock: &qp_table->lock);
428 if (err)
429 goto err_icm;
430
431 refcount_set(r: &qp->refcount, n: 1);
432 init_completion(x: &qp->free);
433
434 return 0;
435
436err_icm:
437 mlx4_qp_free_icm(dev, qpn);
438 return err;
439}
440
441EXPORT_SYMBOL_GPL(mlx4_qp_alloc);
442
443int mlx4_update_qp(struct mlx4_dev *dev, u32 qpn,
444 enum mlx4_update_qp_attr attr,
445 struct mlx4_update_qp_params *params)
446{
447 struct mlx4_cmd_mailbox *mailbox;
448 struct mlx4_update_qp_context *cmd;
449 u64 pri_addr_path_mask = 0;
450 u64 qp_mask = 0;
451 int err = 0;
452
453 if (!attr || (attr & ~MLX4_UPDATE_QP_SUPPORTED_ATTRS))
454 return -EINVAL;
455
456 mailbox = mlx4_alloc_cmd_mailbox(dev);
457 if (IS_ERR(ptr: mailbox))
458 return PTR_ERR(ptr: mailbox);
459
460 cmd = (struct mlx4_update_qp_context *)mailbox->buf;
461
462 if (attr & MLX4_UPDATE_QP_SMAC) {
463 pri_addr_path_mask |= 1ULL << MLX4_UPD_QP_PATH_MASK_MAC_INDEX;
464 cmd->qp_context.pri_path.grh_mylmc = params->smac_index;
465 }
466
467 if (attr & MLX4_UPDATE_QP_ETH_SRC_CHECK_MC_LB) {
468 if (!(dev->caps.flags2
469 & MLX4_DEV_CAP_FLAG2_UPDATE_QP_SRC_CHECK_LB)) {
470 mlx4_warn(dev,
471 "Trying to set src check LB, but it isn't supported\n");
472 err = -EOPNOTSUPP;
473 goto out;
474 }
475 pri_addr_path_mask |=
476 1ULL << MLX4_UPD_QP_PATH_MASK_ETH_SRC_CHECK_MC_LB;
477 if (params->flags &
478 MLX4_UPDATE_QP_PARAMS_FLAGS_ETH_CHECK_MC_LB) {
479 cmd->qp_context.pri_path.fl |=
480 MLX4_FL_ETH_SRC_CHECK_MC_LB;
481 }
482 }
483
484 if (attr & MLX4_UPDATE_QP_VSD) {
485 qp_mask |= 1ULL << MLX4_UPD_QP_MASK_VSD;
486 if (params->flags & MLX4_UPDATE_QP_PARAMS_FLAGS_VSD_ENABLE)
487 cmd->qp_context.param3 |= cpu_to_be32(MLX4_STRIP_VLAN);
488 }
489
490 if (attr & MLX4_UPDATE_QP_RATE_LIMIT) {
491 qp_mask |= 1ULL << MLX4_UPD_QP_MASK_RATE_LIMIT;
492 cmd->qp_context.rate_limit_params = cpu_to_be16((params->rate_unit << 14) | params->rate_val);
493 }
494
495 if (attr & MLX4_UPDATE_QP_QOS_VPORT) {
496 if (!(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_QOS_VPP)) {
497 mlx4_warn(dev, "Granular QoS per VF is not enabled\n");
498 err = -EOPNOTSUPP;
499 goto out;
500 }
501
502 qp_mask |= 1ULL << MLX4_UPD_QP_MASK_QOS_VPP;
503 cmd->qp_context.qos_vport = params->qos_vport;
504 }
505
506 cmd->primary_addr_path_mask = cpu_to_be64(pri_addr_path_mask);
507 cmd->qp_mask = cpu_to_be64(qp_mask);
508
509 err = mlx4_cmd(dev, in_param: mailbox->dma, in_modifier: qpn & 0xffffff, op_modifier: 0,
510 op: MLX4_CMD_UPDATE_QP, timeout: MLX4_CMD_TIME_CLASS_A,
511 native: MLX4_CMD_NATIVE);
512out:
513 mlx4_free_cmd_mailbox(dev, mailbox);
514 return err;
515}
516EXPORT_SYMBOL_GPL(mlx4_update_qp);
517
518void mlx4_qp_remove(struct mlx4_dev *dev, struct mlx4_qp *qp)
519{
520 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
521 unsigned long flags;
522
523 spin_lock_irqsave(&qp_table->lock, flags);
524 radix_tree_delete(&dev->qp_table_tree, qp->qpn & (dev->caps.num_qps - 1));
525 spin_unlock_irqrestore(lock: &qp_table->lock, flags);
526}
527EXPORT_SYMBOL_GPL(mlx4_qp_remove);
528
529void mlx4_qp_free(struct mlx4_dev *dev, struct mlx4_qp *qp)
530{
531 mlx4_put_qp(qp);
532 wait_for_completion(&qp->free);
533
534 mlx4_qp_free_icm(dev, qpn: qp->qpn);
535}
536EXPORT_SYMBOL_GPL(mlx4_qp_free);
537
538static int mlx4_CONF_SPECIAL_QP(struct mlx4_dev *dev, u32 base_qpn)
539{
540 return mlx4_cmd(dev, in_param: 0, in_modifier: base_qpn, op_modifier: 0, op: MLX4_CMD_CONF_SPECIAL_QP,
541 timeout: MLX4_CMD_TIME_CLASS_B, native: MLX4_CMD_NATIVE);
542}
543
544#define MLX4_QP_TABLE_RSS_ETH_PRIORITY 2
545#define MLX4_QP_TABLE_RAW_ETH_PRIORITY 1
546#define MLX4_QP_TABLE_RAW_ETH_SIZE 256
547
548static int mlx4_create_zones(struct mlx4_dev *dev,
549 u32 reserved_bottom_general,
550 u32 reserved_top_general,
551 u32 reserved_bottom_rss,
552 u32 start_offset_rss,
553 u32 max_table_offset)
554{
555 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
556 struct mlx4_bitmap (*bitmap)[MLX4_QP_TABLE_ZONE_NUM] = NULL;
557 int bitmap_initialized = 0;
558 u32 last_offset;
559 int k;
560 int err;
561
562 qp_table->zones = mlx4_zone_allocator_create(flags: MLX4_ZONE_ALLOC_FLAGS_NO_OVERLAP);
563
564 if (NULL == qp_table->zones)
565 return -ENOMEM;
566
567 bitmap = kmalloc(size: sizeof(*bitmap), GFP_KERNEL);
568
569 if (NULL == bitmap) {
570 err = -ENOMEM;
571 goto free_zone;
572 }
573
574 err = mlx4_bitmap_init(bitmap: *bitmap + MLX4_QP_TABLE_ZONE_GENERAL, num: dev->caps.num_qps,
575 mask: (1 << 23) - 1, reserved_bot: reserved_bottom_general,
576 resetrved_top: reserved_top_general);
577
578 if (err)
579 goto free_bitmap;
580
581 ++bitmap_initialized;
582
583 err = mlx4_zone_add_one(zone_alloc: qp_table->zones, bitmap: *bitmap + MLX4_QP_TABLE_ZONE_GENERAL,
584 flags: MLX4_ZONE_FALLBACK_TO_HIGHER_PRIO |
585 MLX4_ZONE_USE_RR, priority: 0,
586 offset: 0, puid: qp_table->zones_uids + MLX4_QP_TABLE_ZONE_GENERAL);
587
588 if (err)
589 goto free_bitmap;
590
591 err = mlx4_bitmap_init(bitmap: *bitmap + MLX4_QP_TABLE_ZONE_RSS,
592 num: reserved_bottom_rss,
593 mask: reserved_bottom_rss - 1,
594 reserved_bot: dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW],
595 resetrved_top: reserved_bottom_rss - start_offset_rss);
596
597 if (err)
598 goto free_bitmap;
599
600 ++bitmap_initialized;
601
602 err = mlx4_zone_add_one(zone_alloc: qp_table->zones, bitmap: *bitmap + MLX4_QP_TABLE_ZONE_RSS,
603 flags: MLX4_ZONE_ALLOW_ALLOC_FROM_LOWER_PRIO |
604 MLX4_ZONE_ALLOW_ALLOC_FROM_EQ_PRIO |
605 MLX4_ZONE_USE_RR, MLX4_QP_TABLE_RSS_ETH_PRIORITY,
606 offset: 0, puid: qp_table->zones_uids + MLX4_QP_TABLE_ZONE_RSS);
607
608 if (err)
609 goto free_bitmap;
610
611 last_offset = dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW];
612 /* We have a single zone for the A0 steering QPs area of the FW. This area
613 * needs to be split into subareas. One set of subareas is for RSS QPs
614 * (in which qp number bits 6 and/or 7 are set); the other set of subareas
615 * is for RAW_ETH QPs, which require that both bits 6 and 7 are zero.
616 * Currently, the values returned by the FW (A0 steering area starting qp number
617 * and A0 steering area size) are such that there are only two subareas -- one
618 * for RSS and one for RAW_ETH.
619 */
620 for (k = MLX4_QP_TABLE_ZONE_RSS + 1; k < sizeof(*bitmap)/sizeof((*bitmap)[0]);
621 k++) {
622 int size;
623 u32 offset = start_offset_rss;
624 u32 bf_mask;
625 u32 requested_size;
626
627 /* Assuming MLX4_BF_QP_SKIP_MASK is consecutive ones, this calculates
628 * a mask of all LSB bits set until (and not including) the first
629 * set bit of MLX4_BF_QP_SKIP_MASK. For example, if MLX4_BF_QP_SKIP_MASK
630 * is 0xc0, bf_mask will be 0x3f.
631 */
632 bf_mask = (MLX4_BF_QP_SKIP_MASK & ~(MLX4_BF_QP_SKIP_MASK - 1)) - 1;
633 requested_size = min((u32)MLX4_QP_TABLE_RAW_ETH_SIZE, bf_mask + 1);
634
635 if (((last_offset & MLX4_BF_QP_SKIP_MASK) &&
636 ((int)(max_table_offset - last_offset)) >=
637 roundup_pow_of_two(MLX4_BF_QP_SKIP_MASK)) ||
638 (!(last_offset & MLX4_BF_QP_SKIP_MASK) &&
639 !((last_offset + requested_size - 1) &
640 MLX4_BF_QP_SKIP_MASK)))
641 size = requested_size;
642 else {
643 u32 candidate_offset =
644 (last_offset | MLX4_BF_QP_SKIP_MASK | bf_mask) + 1;
645
646 if (last_offset & MLX4_BF_QP_SKIP_MASK)
647 last_offset = candidate_offset;
648
649 /* From this point, the BF bits are 0 */
650
651 if (last_offset > max_table_offset) {
652 /* need to skip */
653 size = -1;
654 } else {
655 size = min3(max_table_offset - last_offset,
656 bf_mask - (last_offset & bf_mask),
657 requested_size);
658 if (size < requested_size) {
659 int candidate_size;
660
661 candidate_size = min3(
662 max_table_offset - candidate_offset,
663 bf_mask - (last_offset & bf_mask),
664 requested_size);
665
666 /* We will not take this path if last_offset was
667 * already set above to candidate_offset
668 */
669 if (candidate_size > size) {
670 last_offset = candidate_offset;
671 size = candidate_size;
672 }
673 }
674 }
675 }
676
677 if (size > 0) {
678 /* mlx4_bitmap_alloc_range will find a contiguous range of "size"
679 * QPs in which both bits 6 and 7 are zero, because we pass it the
680 * MLX4_BF_SKIP_MASK).
681 */
682 offset = mlx4_bitmap_alloc_range(
683 bitmap: *bitmap + MLX4_QP_TABLE_ZONE_RSS,
684 cnt: size, align: 1,
685 MLX4_BF_QP_SKIP_MASK);
686
687 if (offset == (u32)-1) {
688 err = -ENOMEM;
689 break;
690 }
691
692 last_offset = offset + size;
693
694 err = mlx4_bitmap_init(bitmap: *bitmap + k, roundup_pow_of_two(size),
695 roundup_pow_of_two(size) - 1, reserved_bot: 0,
696 roundup_pow_of_two(size) - size);
697 } else {
698 /* Add an empty bitmap, we'll allocate from different zones (since
699 * at least one is reserved)
700 */
701 err = mlx4_bitmap_init(bitmap: *bitmap + k, num: 1,
702 MLX4_QP_TABLE_RAW_ETH_SIZE - 1, reserved_bot: 0,
703 resetrved_top: 0);
704 if (!err)
705 mlx4_bitmap_alloc_range(bitmap: *bitmap + k, cnt: 1, align: 1, skip_mask: 0);
706 }
707
708 if (err)
709 break;
710
711 ++bitmap_initialized;
712
713 err = mlx4_zone_add_one(zone_alloc: qp_table->zones, bitmap: *bitmap + k,
714 flags: MLX4_ZONE_ALLOW_ALLOC_FROM_LOWER_PRIO |
715 MLX4_ZONE_ALLOW_ALLOC_FROM_EQ_PRIO |
716 MLX4_ZONE_USE_RR, MLX4_QP_TABLE_RAW_ETH_PRIORITY,
717 offset, puid: qp_table->zones_uids + k);
718
719 if (err)
720 break;
721 }
722
723 if (err)
724 goto free_bitmap;
725
726 qp_table->bitmap_gen = *bitmap;
727
728 return err;
729
730free_bitmap:
731 for (k = 0; k < bitmap_initialized; k++)
732 mlx4_bitmap_cleanup(bitmap: *bitmap + k);
733 kfree(objp: bitmap);
734free_zone:
735 mlx4_zone_allocator_destroy(zone_alloc: qp_table->zones);
736 return err;
737}
738
739static void mlx4_cleanup_qp_zones(struct mlx4_dev *dev)
740{
741 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
742
743 if (qp_table->zones) {
744 int i;
745
746 for (i = 0;
747 i < ARRAY_SIZE(qp_table->zones_uids);
748 i++) {
749 struct mlx4_bitmap *bitmap =
750 mlx4_zone_get_bitmap(zones: qp_table->zones,
751 uid: qp_table->zones_uids[i]);
752
753 mlx4_zone_remove_one(zone_alloc: qp_table->zones, uid: qp_table->zones_uids[i]);
754 if (NULL == bitmap)
755 continue;
756
757 mlx4_bitmap_cleanup(bitmap);
758 }
759 mlx4_zone_allocator_destroy(zone_alloc: qp_table->zones);
760 kfree(objp: qp_table->bitmap_gen);
761 qp_table->bitmap_gen = NULL;
762 qp_table->zones = NULL;
763 }
764}
765
766int mlx4_init_qp_table(struct mlx4_dev *dev)
767{
768 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
769 int err;
770 int reserved_from_top = 0;
771 int reserved_from_bot;
772 int k;
773 int fixed_reserved_from_bot_rv = 0;
774 int bottom_reserved_for_rss_bitmap;
775 u32 max_table_offset = dev->caps.dmfs_high_rate_qpn_base +
776 dev->caps.dmfs_high_rate_qpn_range;
777
778 spin_lock_init(&qp_table->lock);
779 INIT_RADIX_TREE(&dev->qp_table_tree, GFP_ATOMIC);
780 if (mlx4_is_slave(dev))
781 return 0;
782
783 /* We reserve 2 extra QPs per port for the special QPs. The
784 * block of special QPs must be aligned to a multiple of 8, so
785 * round up.
786 *
787 * We also reserve the MSB of the 24-bit QP number to indicate
788 * that a QP is an XRC QP.
789 */
790 for (k = 0; k <= MLX4_QP_REGION_BOTTOM; k++)
791 fixed_reserved_from_bot_rv += dev->caps.reserved_qps_cnt[k];
792
793 if (fixed_reserved_from_bot_rv < max_table_offset)
794 fixed_reserved_from_bot_rv = max_table_offset;
795
796 /* We reserve at least 1 extra for bitmaps that we don't have enough space for*/
797 bottom_reserved_for_rss_bitmap =
798 roundup_pow_of_two(fixed_reserved_from_bot_rv + 1);
799 dev->phys_caps.base_sqpn = ALIGN(bottom_reserved_for_rss_bitmap, 8);
800
801 {
802 int sort[MLX4_NUM_QP_REGION];
803 int i, j;
804 int last_base = dev->caps.num_qps;
805
806 for (i = 1; i < MLX4_NUM_QP_REGION; ++i)
807 sort[i] = i;
808
809 for (i = MLX4_NUM_QP_REGION; i > MLX4_QP_REGION_BOTTOM; --i) {
810 for (j = MLX4_QP_REGION_BOTTOM + 2; j < i; ++j) {
811 if (dev->caps.reserved_qps_cnt[sort[j]] >
812 dev->caps.reserved_qps_cnt[sort[j - 1]])
813 swap(sort[j], sort[j - 1]);
814 }
815 }
816
817 for (i = MLX4_QP_REGION_BOTTOM + 1; i < MLX4_NUM_QP_REGION; ++i) {
818 last_base -= dev->caps.reserved_qps_cnt[sort[i]];
819 dev->caps.reserved_qps_base[sort[i]] = last_base;
820 reserved_from_top +=
821 dev->caps.reserved_qps_cnt[sort[i]];
822 }
823 }
824
825 /* Reserve 8 real SQPs in both native and SRIOV modes.
826 * In addition, in SRIOV mode, reserve 8 proxy SQPs per function
827 * (for all PFs and VFs), and 8 corresponding tunnel QPs.
828 * Each proxy SQP works opposite its own tunnel QP.
829 *
830 * The QPs are arranged as follows:
831 * a. 8 real SQPs
832 * b. All the proxy SQPs (8 per function)
833 * c. All the tunnel QPs (8 per function)
834 */
835 reserved_from_bot = mlx4_num_reserved_sqps(dev);
836 if (reserved_from_bot + reserved_from_top > dev->caps.num_qps) {
837 mlx4_err(dev, "Number of reserved QPs is higher than number of QPs\n");
838 return -EINVAL;
839 }
840
841 err = mlx4_create_zones(dev, reserved_bottom_general: reserved_from_bot, reserved_top_general: reserved_from_bot,
842 reserved_bottom_rss: bottom_reserved_for_rss_bitmap,
843 start_offset_rss: fixed_reserved_from_bot_rv,
844 max_table_offset);
845
846 if (err)
847 return err;
848
849 if (mlx4_is_mfunc(dev)) {
850 /* for PPF use */
851 dev->phys_caps.base_proxy_sqpn = dev->phys_caps.base_sqpn + 8;
852 dev->phys_caps.base_tunnel_sqpn = dev->phys_caps.base_sqpn + 8 + 8 * MLX4_MFUNC_MAX;
853
854 /* In mfunc, calculate proxy and tunnel qp offsets for the PF here,
855 * since the PF does not call mlx4_slave_caps */
856 dev->caps.spec_qps = kcalloc(n: dev->caps.num_ports,
857 size: sizeof(*dev->caps.spec_qps),
858 GFP_KERNEL);
859 if (!dev->caps.spec_qps) {
860 err = -ENOMEM;
861 goto err_mem;
862 }
863
864 for (k = 0; k < dev->caps.num_ports; k++) {
865 dev->caps.spec_qps[k].qp0_proxy = dev->phys_caps.base_proxy_sqpn +
866 8 * mlx4_master_func_num(dev) + k;
867 dev->caps.spec_qps[k].qp0_tunnel = dev->caps.spec_qps[k].qp0_proxy + 8 * MLX4_MFUNC_MAX;
868 dev->caps.spec_qps[k].qp1_proxy = dev->phys_caps.base_proxy_sqpn +
869 8 * mlx4_master_func_num(dev) + MLX4_MAX_PORTS + k;
870 dev->caps.spec_qps[k].qp1_tunnel = dev->caps.spec_qps[k].qp1_proxy + 8 * MLX4_MFUNC_MAX;
871 }
872 }
873
874
875 err = mlx4_CONF_SPECIAL_QP(dev, base_qpn: dev->phys_caps.base_sqpn);
876 if (err)
877 goto err_mem;
878
879 return err;
880
881err_mem:
882 kfree(objp: dev->caps.spec_qps);
883 dev->caps.spec_qps = NULL;
884 mlx4_cleanup_qp_zones(dev);
885 return err;
886}
887
888void mlx4_cleanup_qp_table(struct mlx4_dev *dev)
889{
890 if (mlx4_is_slave(dev))
891 return;
892
893 mlx4_CONF_SPECIAL_QP(dev, base_qpn: 0);
894
895 mlx4_cleanup_qp_zones(dev);
896}
897
898int mlx4_qp_query(struct mlx4_dev *dev, struct mlx4_qp *qp,
899 struct mlx4_qp_context *context)
900{
901 struct mlx4_cmd_mailbox *mailbox;
902 int err;
903
904 mailbox = mlx4_alloc_cmd_mailbox(dev);
905 if (IS_ERR(ptr: mailbox))
906 return PTR_ERR(ptr: mailbox);
907
908 err = mlx4_cmd_box(dev, in_param: 0, out_param: mailbox->dma, in_modifier: qp->qpn, op_modifier: 0,
909 op: MLX4_CMD_QUERY_QP, timeout: MLX4_CMD_TIME_CLASS_A,
910 native: MLX4_CMD_WRAPPED);
911 if (!err)
912 memcpy(context, mailbox->buf + 8, sizeof(*context));
913
914 mlx4_free_cmd_mailbox(dev, mailbox);
915 return err;
916}
917EXPORT_SYMBOL_GPL(mlx4_qp_query);
918
919int mlx4_qp_to_ready(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
920 struct mlx4_qp_context *context,
921 struct mlx4_qp *qp, enum mlx4_qp_state *qp_state)
922{
923 int err;
924 int i;
925 static const enum mlx4_qp_state states[] = {
926 MLX4_QP_STATE_RST,
927 MLX4_QP_STATE_INIT,
928 MLX4_QP_STATE_RTR,
929 MLX4_QP_STATE_RTS
930 };
931
932 for (i = 0; i < ARRAY_SIZE(states) - 1; i++) {
933 context->flags &= cpu_to_be32(~(0xf << 28));
934 context->flags |= cpu_to_be32(states[i + 1] << 28);
935 if (states[i + 1] != MLX4_QP_STATE_RTR)
936 context->params2 &= ~cpu_to_be32(MLX4_QP_BIT_FPP);
937 err = mlx4_qp_modify(dev, mtt, states[i], states[i + 1],
938 context, 0, 0, qp);
939 if (err) {
940 mlx4_err(dev, "Failed to bring QP to state: %d with error: %d\n",
941 states[i + 1], err);
942 return err;
943 }
944
945 *qp_state = states[i + 1];
946 }
947
948 return 0;
949}
950EXPORT_SYMBOL_GPL(mlx4_qp_to_ready);
951
952u16 mlx4_qp_roce_entropy(struct mlx4_dev *dev, u32 qpn)
953{
954 struct mlx4_qp_context context;
955 struct mlx4_qp qp;
956 int err;
957
958 qp.qpn = qpn;
959 err = mlx4_qp_query(dev, &qp, &context);
960 if (!err) {
961 u32 dest_qpn = be32_to_cpu(context.remote_qpn) & 0xffffff;
962 u16 folded_dst = folded_qp(q: dest_qpn);
963 u16 folded_src = folded_qp(q: qpn);
964
965 return (dest_qpn != qpn) ?
966 ((folded_dst ^ folded_src) | 0xC000) :
967 folded_src | 0xC000;
968 }
969 return 0xdead;
970}
971

source code of linux/drivers/net/ethernet/mellanox/mlx4/qp.c