xref: /trueos/sys/ofed/drivers/net/mlx4/qp.c (revision 7a1ab70b9590c4c122be3d913b579be45424f95a)
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, 2014 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/types.h>
37 #include <linux/gfp.h>
38 #include <linux/module.h>
39 
40 #include <linux/mlx4/cmd.h>
41 #include <linux/mlx4/qp.h>
42 
43 #include "mlx4.h"
44 #include "icm.h"
45 
46 /*
47  * QP to support BF should have bits 6,7 cleared
48  */
49 #define MLX4_BF_QP_SKIP_MASK	0xc0
50 #define MLX4_MAX_BF_QP_RANGE	0x40
51 
mlx4_qp_event(struct mlx4_dev * dev,u32 qpn,int event_type)52 void mlx4_qp_event(struct mlx4_dev *dev, u32 qpn, int event_type)
53 {
54 	struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
55 	struct mlx4_qp *qp;
56 
57 	spin_lock(&qp_table->lock);
58 
59 	qp = __mlx4_qp_lookup(dev, qpn);
60 	if (qp)
61 		atomic_inc(&qp->refcount);
62 
63 	spin_unlock(&qp_table->lock);
64 
65 	if (!qp) {
66 		mlx4_dbg(dev, "Async event for none existent QP %08x\n", qpn);
67 		return;
68 	}
69 
70 	qp->event(qp, event_type);
71 
72 	if (atomic_dec_and_test(&qp->refcount))
73 		complete(&qp->free);
74 }
75 
76 /* used for INIT/CLOSE port logic */
is_master_qp0(struct mlx4_dev * dev,struct mlx4_qp * qp,int * real_qp0,int * proxy_qp0)77 static int is_master_qp0(struct mlx4_dev *dev, struct mlx4_qp *qp, int *real_qp0, int *proxy_qp0)
78 {
79 	/* this procedure is called after we already know we are on the master */
80 	/* qp0 is either the proxy qp0, or the real qp0 */
81 	u32 pf_proxy_offset = dev->phys_caps.base_proxy_sqpn + 8 * mlx4_master_func_num(dev);
82 	*proxy_qp0 = qp->qpn >= pf_proxy_offset && qp->qpn <= pf_proxy_offset + 1;
83 
84 	*real_qp0 = qp->qpn >= dev->phys_caps.base_sqpn &&
85 		qp->qpn <= dev->phys_caps.base_sqpn + 1;
86 
87 	return *real_qp0 || *proxy_qp0;
88 }
89 
__mlx4_qp_modify(struct mlx4_dev * dev,struct mlx4_mtt * mtt,enum mlx4_qp_state cur_state,enum mlx4_qp_state new_state,struct mlx4_qp_context * context,enum mlx4_qp_optpar optpar,int sqd_event,struct mlx4_qp * qp,int native)90 static int __mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
91 		     enum mlx4_qp_state cur_state, enum mlx4_qp_state new_state,
92 		     struct mlx4_qp_context *context,
93 		     enum mlx4_qp_optpar optpar,
94 		     int sqd_event, struct mlx4_qp *qp, int native)
95 {
96 	static const u16 op[MLX4_QP_NUM_STATE][MLX4_QP_NUM_STATE] = {
97 		[MLX4_QP_STATE_RST] = {
98 			[MLX4_QP_STATE_RST]	= MLX4_CMD_2RST_QP,
99 			[MLX4_QP_STATE_ERR]	= MLX4_CMD_2ERR_QP,
100 			[MLX4_QP_STATE_INIT]	= MLX4_CMD_RST2INIT_QP,
101 		},
102 		[MLX4_QP_STATE_INIT]  = {
103 			[MLX4_QP_STATE_RST]	= MLX4_CMD_2RST_QP,
104 			[MLX4_QP_STATE_ERR]	= MLX4_CMD_2ERR_QP,
105 			[MLX4_QP_STATE_INIT]	= MLX4_CMD_INIT2INIT_QP,
106 			[MLX4_QP_STATE_RTR]	= MLX4_CMD_INIT2RTR_QP,
107 		},
108 		[MLX4_QP_STATE_RTR]   = {
109 			[MLX4_QP_STATE_RST]	= MLX4_CMD_2RST_QP,
110 			[MLX4_QP_STATE_ERR]	= MLX4_CMD_2ERR_QP,
111 			[MLX4_QP_STATE_RTS]	= MLX4_CMD_RTR2RTS_QP,
112 		},
113 		[MLX4_QP_STATE_RTS]   = {
114 			[MLX4_QP_STATE_RST]	= MLX4_CMD_2RST_QP,
115 			[MLX4_QP_STATE_ERR]	= MLX4_CMD_2ERR_QP,
116 			[MLX4_QP_STATE_RTS]	= MLX4_CMD_RTS2RTS_QP,
117 			[MLX4_QP_STATE_SQD]	= MLX4_CMD_RTS2SQD_QP,
118 		},
119 		[MLX4_QP_STATE_SQD] = {
120 			[MLX4_QP_STATE_RST]	= MLX4_CMD_2RST_QP,
121 			[MLX4_QP_STATE_ERR]	= MLX4_CMD_2ERR_QP,
122 			[MLX4_QP_STATE_RTS]	= MLX4_CMD_SQD2RTS_QP,
123 			[MLX4_QP_STATE_SQD]	= MLX4_CMD_SQD2SQD_QP,
124 		},
125 		[MLX4_QP_STATE_SQER] = {
126 			[MLX4_QP_STATE_RST]	= MLX4_CMD_2RST_QP,
127 			[MLX4_QP_STATE_ERR]	= MLX4_CMD_2ERR_QP,
128 			[MLX4_QP_STATE_RTS]	= MLX4_CMD_SQERR2RTS_QP,
129 		},
130 		[MLX4_QP_STATE_ERR] = {
131 			[MLX4_QP_STATE_RST]	= MLX4_CMD_2RST_QP,
132 			[MLX4_QP_STATE_ERR]	= MLX4_CMD_2ERR_QP,
133 		}
134 	};
135 
136 	struct mlx4_priv *priv = mlx4_priv(dev);
137 	struct mlx4_cmd_mailbox *mailbox;
138 	int ret = 0;
139 	int real_qp0 = 0;
140 	int proxy_qp0 = 0;
141 	u8 port;
142 
143 	if (cur_state >= MLX4_QP_NUM_STATE || new_state >= MLX4_QP_NUM_STATE ||
144 	    !op[cur_state][new_state])
145 		return -EINVAL;
146 
147 	if (op[cur_state][new_state] == MLX4_CMD_2RST_QP) {
148 		ret = mlx4_cmd(dev, 0, qp->qpn, 2,
149 			MLX4_CMD_2RST_QP, MLX4_CMD_TIME_CLASS_A, native);
150 		if (mlx4_is_master(dev) && cur_state != MLX4_QP_STATE_ERR &&
151 		    cur_state != MLX4_QP_STATE_RST &&
152 		    is_master_qp0(dev, qp, &real_qp0, &proxy_qp0)) {
153 			port = (qp->qpn & 1) + 1;
154 			if (proxy_qp0)
155 				priv->mfunc.master.qp0_state[port].proxy_qp0_active = 0;
156 			else
157 				priv->mfunc.master.qp0_state[port].qp0_active = 0;
158 		}
159 		return ret;
160 	}
161 
162 	mailbox = mlx4_alloc_cmd_mailbox(dev);
163 	if (IS_ERR(mailbox))
164 		return PTR_ERR(mailbox);
165 
166 	if (cur_state == MLX4_QP_STATE_RST && new_state == MLX4_QP_STATE_INIT) {
167 		u64 mtt_addr = mlx4_mtt_addr(dev, mtt);
168 		context->mtt_base_addr_h = mtt_addr >> 32;
169 		context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
170 		context->log_page_size   = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
171 	}
172 
173 	*(__be32 *) mailbox->buf = cpu_to_be32(optpar);
174 	memcpy(mailbox->buf + 8, context, sizeof *context);
175 
176 	((struct mlx4_qp_context *) (mailbox->buf + 8))->local_qpn =
177 		cpu_to_be32(qp->qpn);
178 
179 	ret = mlx4_cmd(dev, mailbox->dma,
180 		       qp->qpn | (!!sqd_event << 31),
181 		       new_state == MLX4_QP_STATE_RST ? 2 : 0,
182 		       op[cur_state][new_state], MLX4_CMD_TIME_CLASS_C, native);
183 
184 	if (mlx4_is_master(dev) && is_master_qp0(dev, qp, &real_qp0, &proxy_qp0)) {
185 		port = (qp->qpn & 1) + 1;
186 		if (cur_state != MLX4_QP_STATE_ERR &&
187 		    cur_state != MLX4_QP_STATE_RST &&
188 		    new_state == MLX4_QP_STATE_ERR) {
189 			if (proxy_qp0)
190 				priv->mfunc.master.qp0_state[port].proxy_qp0_active = 0;
191 			else
192 				priv->mfunc.master.qp0_state[port].qp0_active = 0;
193 		} else if (new_state == MLX4_QP_STATE_RTR) {
194 			if (proxy_qp0)
195 				priv->mfunc.master.qp0_state[port].proxy_qp0_active = 1;
196 			else
197 				priv->mfunc.master.qp0_state[port].qp0_active = 1;
198 		}
199 	}
200 
201 	mlx4_free_cmd_mailbox(dev, mailbox);
202 	return ret;
203 }
204 
mlx4_qp_modify(struct mlx4_dev * dev,struct mlx4_mtt * mtt,enum mlx4_qp_state cur_state,enum mlx4_qp_state new_state,struct mlx4_qp_context * context,enum mlx4_qp_optpar optpar,int sqd_event,struct mlx4_qp * qp)205 int mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
206 		   enum mlx4_qp_state cur_state, enum mlx4_qp_state new_state,
207 		   struct mlx4_qp_context *context,
208 		   enum mlx4_qp_optpar optpar,
209 		   int sqd_event, struct mlx4_qp *qp)
210 {
211 	return __mlx4_qp_modify(dev, mtt, cur_state, new_state, context,
212 				optpar, sqd_event, qp, 0);
213 }
214 EXPORT_SYMBOL_GPL(mlx4_qp_modify);
215 
__mlx4_qp_reserve_range(struct mlx4_dev * dev,int cnt,int align,int * base,u8 flags)216 int __mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align,
217 			    int *base, u8 flags)
218 {
219 	int bf_qp = !!(flags & (u8) MLX4_RESERVE_BF_QP);
220 
221 	struct mlx4_priv *priv = mlx4_priv(dev);
222 	struct mlx4_qp_table *qp_table = &priv->qp_table;
223 
224 	/* Only IPoIB uses a large cnt. In this case, just allocate
225 	 * as usual, ignoring bf skipping, since IPoIB does not run over RoCE
226 	 */
227 	if (cnt > MLX4_MAX_BF_QP_RANGE && bf_qp)
228 		bf_qp = 0;
229 
230 	*base = mlx4_bitmap_alloc_range(&qp_table->bitmap, cnt, align,
231 					bf_qp ? MLX4_BF_QP_SKIP_MASK : 0);
232 	if (*base == -1)
233 		return -ENOMEM;
234 
235 	return 0;
236 }
237 
mlx4_qp_reserve_range(struct mlx4_dev * dev,int cnt,int align,int * base,u8 flags)238 int mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align,
239 			  int *base, u8 flags)
240 {
241 	u64 in_param = 0;
242 	u64 out_param;
243 	int err;
244 
245 	if (mlx4_is_mfunc(dev)) {
246 		set_param_l(&in_param, (((u32) flags) << 24) | (u32) cnt);
247 		set_param_h(&in_param, align);
248 		err = mlx4_cmd_imm(dev, in_param, &out_param,
249 				   RES_QP, RES_OP_RESERVE,
250 				   MLX4_CMD_ALLOC_RES,
251 				   MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
252 		if (err)
253 			return err;
254 
255 		*base = get_param_l(&out_param);
256 		return 0;
257 	}
258 	return __mlx4_qp_reserve_range(dev, cnt, align, base, flags);
259 }
260 EXPORT_SYMBOL_GPL(mlx4_qp_reserve_range);
261 
__mlx4_qp_release_range(struct mlx4_dev * dev,int base_qpn,int cnt)262 void __mlx4_qp_release_range(struct mlx4_dev *dev, int base_qpn, int cnt)
263 {
264 	struct mlx4_priv *priv = mlx4_priv(dev);
265 	struct mlx4_qp_table *qp_table = &priv->qp_table;
266 
267 	if (mlx4_is_qp_reserved(dev, (u32) base_qpn))
268 		return;
269 	mlx4_bitmap_free_range(&qp_table->bitmap, base_qpn, cnt, MLX4_USE_RR);
270 }
271 
mlx4_qp_release_range(struct mlx4_dev * dev,int base_qpn,int cnt)272 void mlx4_qp_release_range(struct mlx4_dev *dev, int base_qpn, int cnt)
273 {
274 	u64 in_param = 0;
275 	int err;
276 
277 	if (mlx4_is_mfunc(dev)) {
278 		set_param_l(&in_param, base_qpn);
279 		set_param_h(&in_param, cnt);
280 		err = mlx4_cmd(dev, in_param, RES_QP, RES_OP_RESERVE,
281 			       MLX4_CMD_FREE_RES,
282 			       MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
283 		if (err) {
284 			mlx4_warn(dev, "Failed to release qp range"
285 				  " base:%d cnt:%d\n", base_qpn, cnt);
286 		}
287 	} else
288 		 __mlx4_qp_release_range(dev, base_qpn, cnt);
289 }
290 EXPORT_SYMBOL_GPL(mlx4_qp_release_range);
291 
__mlx4_qp_alloc_icm(struct mlx4_dev * dev,int qpn)292 int __mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn)
293 {
294 	struct mlx4_priv *priv = mlx4_priv(dev);
295 	struct mlx4_qp_table *qp_table = &priv->qp_table;
296 	int err;
297 
298 	err = mlx4_table_get(dev, &qp_table->qp_table, qpn);
299 	if (err)
300 		goto err_out;
301 
302 	err = mlx4_table_get(dev, &qp_table->auxc_table, qpn);
303 	if (err)
304 		goto err_put_qp;
305 
306 	err = mlx4_table_get(dev, &qp_table->altc_table, qpn);
307 	if (err)
308 		goto err_put_auxc;
309 
310 	err = mlx4_table_get(dev, &qp_table->rdmarc_table, qpn);
311 	if (err)
312 		goto err_put_altc;
313 
314 	err = mlx4_table_get(dev, &qp_table->cmpt_table, qpn);
315 	if (err)
316 		goto err_put_rdmarc;
317 
318 	return 0;
319 
320 err_put_rdmarc:
321 	mlx4_table_put(dev, &qp_table->rdmarc_table, qpn);
322 
323 err_put_altc:
324 	mlx4_table_put(dev, &qp_table->altc_table, qpn);
325 
326 err_put_auxc:
327 	mlx4_table_put(dev, &qp_table->auxc_table, qpn);
328 
329 err_put_qp:
330 	mlx4_table_put(dev, &qp_table->qp_table, qpn);
331 
332 err_out:
333 	return err;
334 }
335 
mlx4_qp_alloc_icm(struct mlx4_dev * dev,int qpn)336 static int mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn)
337 {
338 	u64 param = 0;
339 
340 	if (mlx4_is_mfunc(dev)) {
341 		set_param_l(&param, qpn);
342 		return mlx4_cmd_imm(dev, param, &param, RES_QP, RES_OP_MAP_ICM,
343 				    MLX4_CMD_ALLOC_RES, MLX4_CMD_TIME_CLASS_A,
344 				    MLX4_CMD_WRAPPED);
345 	}
346 	return __mlx4_qp_alloc_icm(dev, qpn);
347 }
348 
__mlx4_qp_free_icm(struct mlx4_dev * dev,int qpn)349 void __mlx4_qp_free_icm(struct mlx4_dev *dev, int qpn)
350 {
351 	struct mlx4_priv *priv = mlx4_priv(dev);
352 	struct mlx4_qp_table *qp_table = &priv->qp_table;
353 
354 	mlx4_table_put(dev, &qp_table->cmpt_table, qpn);
355 	mlx4_table_put(dev, &qp_table->rdmarc_table, qpn);
356 	mlx4_table_put(dev, &qp_table->altc_table, qpn);
357 	mlx4_table_put(dev, &qp_table->auxc_table, qpn);
358 	mlx4_table_put(dev, &qp_table->qp_table, qpn);
359 }
360 
mlx4_qp_free_icm(struct mlx4_dev * dev,int qpn)361 static void mlx4_qp_free_icm(struct mlx4_dev *dev, int qpn)
362 {
363 	u64 in_param = 0;
364 
365 	if (mlx4_is_mfunc(dev)) {
366 		set_param_l(&in_param, qpn);
367 		if (mlx4_cmd(dev, in_param, RES_QP, RES_OP_MAP_ICM,
368 			     MLX4_CMD_FREE_RES, MLX4_CMD_TIME_CLASS_A,
369 			     MLX4_CMD_WRAPPED))
370 			mlx4_warn(dev, "Failed to free icm of qp:%d\n", qpn);
371 	} else
372 		__mlx4_qp_free_icm(dev, qpn);
373 }
374 
mlx4_qp_alloc(struct mlx4_dev * dev,int qpn,struct mlx4_qp * qp)375 int mlx4_qp_alloc(struct mlx4_dev *dev, int qpn, struct mlx4_qp *qp)
376 {
377 	struct mlx4_priv *priv = mlx4_priv(dev);
378 	struct mlx4_qp_table *qp_table = &priv->qp_table;
379 	int err;
380 
381 	if (!qpn)
382 		return -EINVAL;
383 
384 	qp->qpn = qpn;
385 
386 	err = mlx4_qp_alloc_icm(dev, qpn);
387 	if (err)
388 		return err;
389 
390 	spin_lock_irq(&qp_table->lock);
391 	err = radix_tree_insert(&dev->qp_table_tree, qp->qpn &
392 				(dev->caps.num_qps - 1), qp);
393 	spin_unlock_irq(&qp_table->lock);
394 	if (err)
395 		goto err_icm;
396 
397 	atomic_set(&qp->refcount, 1);
398 	init_completion(&qp->free);
399 
400 	return 0;
401 
402 err_icm:
403 	mlx4_qp_free_icm(dev, qpn);
404 	return err;
405 }
406 
407 EXPORT_SYMBOL_GPL(mlx4_qp_alloc);
408 
mlx4_qp_remove(struct mlx4_dev * dev,struct mlx4_qp * qp)409 void mlx4_qp_remove(struct mlx4_dev *dev, struct mlx4_qp *qp)
410 {
411 	struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
412 	unsigned long flags;
413 
414 	spin_lock_irqsave(&qp_table->lock, flags);
415 	radix_tree_delete(&dev->qp_table_tree, qp->qpn & (dev->caps.num_qps - 1));
416 	spin_unlock_irqrestore(&qp_table->lock, flags);
417 }
418 EXPORT_SYMBOL_GPL(mlx4_qp_remove);
419 
mlx4_qp_free(struct mlx4_dev * dev,struct mlx4_qp * qp)420 void mlx4_qp_free(struct mlx4_dev *dev, struct mlx4_qp *qp)
421 {
422 	if (atomic_dec_and_test(&qp->refcount))
423 		complete(&qp->free);
424 	wait_for_completion(&qp->free);
425 
426 	mlx4_qp_free_icm(dev, qp->qpn);
427 }
428 EXPORT_SYMBOL_GPL(mlx4_qp_free);
429 
mlx4_CONF_SPECIAL_QP(struct mlx4_dev * dev,u32 base_qpn)430 static int mlx4_CONF_SPECIAL_QP(struct mlx4_dev *dev, u32 base_qpn)
431 {
432 	return mlx4_cmd(dev, 0, base_qpn, 0, MLX4_CMD_CONF_SPECIAL_QP,
433 			MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
434 }
435 
mlx4_init_qp_table(struct mlx4_dev * dev)436 int mlx4_init_qp_table(struct mlx4_dev *dev)
437 {
438 	struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
439 	int err;
440 	int reserved_from_top = 0;
441 	int reserved_from_bot;
442 	int k;
443 
444 	spin_lock_init(&qp_table->lock);
445 	INIT_RADIX_TREE(&dev->qp_table_tree, GFP_ATOMIC);
446 	if (mlx4_is_slave(dev))
447 		return 0;
448 
449 	/*
450 	 * We reserve 2 extra QPs per port for the special QPs.  The
451 	 * block of special QPs must be aligned to a multiple of 8, so
452 	 * round up.
453 	 *
454 	 * We also reserve the MSB of the 24-bit QP number to indicate
455 	 * that a QP is an XRC QP.
456 	 */
457 	dev->phys_caps.base_sqpn =
458 		ALIGN(dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW], 8);
459 
460 	{
461 		int sort[MLX4_NUM_QP_REGION];
462 		int i, j, tmp;
463 		int last_base = dev->caps.num_qps;
464 
465 		for (i = 1; i < MLX4_NUM_QP_REGION; ++i)
466 			sort[i] = i;
467 
468 		for (i = MLX4_NUM_QP_REGION; i > 0; --i) {
469 			for (j = 2; j < i; ++j) {
470 				if (dev->caps.reserved_qps_cnt[sort[j]] >
471 				    dev->caps.reserved_qps_cnt[sort[j - 1]]) {
472 					tmp             = sort[j];
473 					sort[j]         = sort[j - 1];
474 					sort[j - 1]     = tmp;
475 				}
476 			}
477 		}
478 
479 		for (i = 1; i < MLX4_NUM_QP_REGION; ++i) {
480 			last_base -= dev->caps.reserved_qps_cnt[sort[i]];
481 			dev->caps.reserved_qps_base[sort[i]] = last_base;
482 			reserved_from_top +=
483 				dev->caps.reserved_qps_cnt[sort[i]];
484 		}
485 
486 	}
487 
488        /* Reserve 8 real SQPs in both native and SRIOV modes.
489 	* In addition, in SRIOV mode, reserve 8 proxy SQPs per function
490 	* (for all PFs and VFs), and 8 corresponding tunnel QPs.
491 	* Each proxy SQP works opposite its own tunnel QP.
492 	*
493 	* The QPs are arranged as follows:
494 	* a. 8 real SQPs
495 	* b. All the proxy SQPs (8 per function)
496 	* c. All the tunnel QPs (8 per function)
497 	*/
498 	reserved_from_bot = mlx4_num_reserved_sqps(dev);
499 	if (reserved_from_bot + reserved_from_top > dev->caps.num_qps) {
500 		mlx4_err(dev, "Number of reserved QPs is higher than number "
501 			 "of QPs, increase the value of log_num_qp\n");
502 		return -EINVAL;
503 	}
504 
505 	err = mlx4_bitmap_init(&qp_table->bitmap, dev->caps.num_qps,
506 			       (1 << 23) - 1, reserved_from_bot,
507 			       reserved_from_top);
508 	if (err)
509 		return err;
510 
511 	if (mlx4_is_mfunc(dev)) {
512 		/* for PPF use */
513 		dev->phys_caps.base_proxy_sqpn = dev->phys_caps.base_sqpn + 8;
514 		dev->phys_caps.base_tunnel_sqpn = dev->phys_caps.base_sqpn + 8 + 8 * MLX4_MFUNC_MAX;
515 
516 		/* In mfunc, calculate proxy and tunnel qp offsets for the PF here,
517 		 * since the PF does not call mlx4_slave_caps */
518 		dev->caps.qp0_tunnel = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL);
519 		dev->caps.qp0_proxy = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL);
520 		dev->caps.qp1_tunnel = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL);
521 		dev->caps.qp1_proxy = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL);
522 
523 		if (!dev->caps.qp0_tunnel || !dev->caps.qp0_proxy ||
524 		    !dev->caps.qp1_tunnel || !dev->caps.qp1_proxy) {
525 			err = -ENOMEM;
526 			goto err_mem;
527 		}
528 
529 		for (k = 0; k < dev->caps.num_ports; k++) {
530 			dev->caps.qp0_proxy[k] = dev->phys_caps.base_proxy_sqpn +
531 				8 * mlx4_master_func_num(dev) + k;
532 			dev->caps.qp0_tunnel[k] = dev->caps.qp0_proxy[k] + 8 * MLX4_MFUNC_MAX;
533 			dev->caps.qp1_proxy[k] = dev->phys_caps.base_proxy_sqpn +
534 				8 * mlx4_master_func_num(dev) + MLX4_MAX_PORTS + k;
535 			dev->caps.qp1_tunnel[k] = dev->caps.qp1_proxy[k] + 8 * MLX4_MFUNC_MAX;
536 		}
537 	}
538 
539 
540 	err = mlx4_CONF_SPECIAL_QP(dev, dev->phys_caps.base_sqpn);
541 	if (err)
542 		goto err_mem;
543 	return 0;
544 
545 err_mem:
546 	kfree(dev->caps.qp0_tunnel);
547 	kfree(dev->caps.qp0_proxy);
548 	kfree(dev->caps.qp1_tunnel);
549 	kfree(dev->caps.qp1_proxy);
550 	dev->caps.qp0_tunnel = dev->caps.qp0_proxy =
551 		dev->caps.qp1_tunnel = dev->caps.qp1_proxy = NULL;
552 	return err;
553 }
554 
mlx4_cleanup_qp_table(struct mlx4_dev * dev)555 void mlx4_cleanup_qp_table(struct mlx4_dev *dev)
556 {
557 	if (mlx4_is_slave(dev))
558 		return;
559 
560 	mlx4_CONF_SPECIAL_QP(dev, 0);
561 	mlx4_bitmap_cleanup(&mlx4_priv(dev)->qp_table.bitmap);
562 }
563 
mlx4_qp_query(struct mlx4_dev * dev,struct mlx4_qp * qp,struct mlx4_qp_context * context)564 int mlx4_qp_query(struct mlx4_dev *dev, struct mlx4_qp *qp,
565 		  struct mlx4_qp_context *context)
566 {
567 	struct mlx4_cmd_mailbox *mailbox;
568 	int err;
569 
570 	mailbox = mlx4_alloc_cmd_mailbox(dev);
571 	if (IS_ERR(mailbox))
572 		return PTR_ERR(mailbox);
573 
574 	err = mlx4_cmd_box(dev, 0, mailbox->dma, qp->qpn, 0,
575 			   MLX4_CMD_QUERY_QP, MLX4_CMD_TIME_CLASS_A,
576 			   MLX4_CMD_WRAPPED);
577 	if (!err)
578 		memcpy(context, mailbox->buf + 8, sizeof *context);
579 
580 	mlx4_free_cmd_mailbox(dev, mailbox);
581 	return err;
582 }
583 EXPORT_SYMBOL_GPL(mlx4_qp_query);
584 
mlx4_qp_to_ready(struct mlx4_dev * dev,struct mlx4_mtt * mtt,struct mlx4_qp_context * context,struct mlx4_qp * qp,enum mlx4_qp_state * qp_state)585 int mlx4_qp_to_ready(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
586 		     struct mlx4_qp_context *context,
587 		     struct mlx4_qp *qp, enum mlx4_qp_state *qp_state)
588 {
589 	int err;
590 	int i;
591 	enum mlx4_qp_state states[] = {
592 		MLX4_QP_STATE_RST,
593 		MLX4_QP_STATE_INIT,
594 		MLX4_QP_STATE_RTR,
595 		MLX4_QP_STATE_RTS
596 	};
597 
598 	for (i = 0; i < ARRAY_SIZE(states) - 1; i++) {
599 		context->flags &= cpu_to_be32(~(0xf << 28));
600 		context->flags |= cpu_to_be32(states[i + 1] << 28);
601 		err = mlx4_qp_modify(dev, mtt, states[i], states[i + 1],
602 				     context, 0, 0, qp);
603 		if (err) {
604 			mlx4_err(dev, "Failed to bring QP to state: "
605 				 "%d with error: %d\n",
606 				 states[i + 1], err);
607 			return err;
608 		}
609 
610 		*qp_state = states[i + 1];
611 	}
612 
613 	return 0;
614 }
615 EXPORT_SYMBOL_GPL(mlx4_qp_to_ready);
616