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.
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:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
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.
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
36 #include <linux/gfp.h>
37 #include <linux/export.h>
38 #include <linux/init.h>
40 #include <linux/mlx4/cmd.h>
41 #include <linux/mlx4/qp.h>
46 void mlx4_qp_event(struct mlx4_dev *dev, u32 qpn, int event_type)
48 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
51 spin_lock(&qp_table->lock);
53 qp = __mlx4_qp_lookup(dev, qpn);
55 atomic_inc(&qp->refcount);
57 spin_unlock(&qp_table->lock);
60 mlx4_dbg(dev, "Async event for none existent QP %08x\n", qpn);
64 qp->event(qp, event_type);
66 if (atomic_dec_and_test(&qp->refcount))
70 static int is_qp0(struct mlx4_dev *dev, struct mlx4_qp *qp)
72 return qp->qpn >= dev->caps.sqp_start &&
73 qp->qpn <= dev->caps.sqp_start + 1;
76 static int __mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
77 enum mlx4_qp_state cur_state, enum mlx4_qp_state new_state,
78 struct mlx4_qp_context *context,
79 enum mlx4_qp_optpar optpar,
80 int sqd_event, struct mlx4_qp *qp, int native)
82 static const u16 op[MLX4_QP_NUM_STATE][MLX4_QP_NUM_STATE] = {
83 [MLX4_QP_STATE_RST] = {
84 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
85 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
86 [MLX4_QP_STATE_INIT] = MLX4_CMD_RST2INIT_QP,
88 [MLX4_QP_STATE_INIT] = {
89 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
90 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
91 [MLX4_QP_STATE_INIT] = MLX4_CMD_INIT2INIT_QP,
92 [MLX4_QP_STATE_RTR] = MLX4_CMD_INIT2RTR_QP,
94 [MLX4_QP_STATE_RTR] = {
95 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
96 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
97 [MLX4_QP_STATE_RTS] = MLX4_CMD_RTR2RTS_QP,
99 [MLX4_QP_STATE_RTS] = {
100 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
101 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
102 [MLX4_QP_STATE_RTS] = MLX4_CMD_RTS2RTS_QP,
103 [MLX4_QP_STATE_SQD] = MLX4_CMD_RTS2SQD_QP,
105 [MLX4_QP_STATE_SQD] = {
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_SQD2RTS_QP,
109 [MLX4_QP_STATE_SQD] = MLX4_CMD_SQD2SQD_QP,
111 [MLX4_QP_STATE_SQER] = {
112 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
113 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
114 [MLX4_QP_STATE_RTS] = MLX4_CMD_SQERR2RTS_QP,
116 [MLX4_QP_STATE_ERR] = {
117 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
118 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
122 struct mlx4_priv *priv = mlx4_priv(dev);
123 struct mlx4_cmd_mailbox *mailbox;
127 if (cur_state >= MLX4_QP_NUM_STATE || new_state >= MLX4_QP_NUM_STATE ||
128 !op[cur_state][new_state])
131 if (op[cur_state][new_state] == MLX4_CMD_2RST_QP) {
132 ret = mlx4_cmd(dev, 0, qp->qpn, 2,
133 MLX4_CMD_2RST_QP, MLX4_CMD_TIME_CLASS_A, native);
134 if (mlx4_is_master(dev) && cur_state != MLX4_QP_STATE_ERR &&
135 cur_state != MLX4_QP_STATE_RST &&
137 port = (qp->qpn & 1) + 1;
138 priv->mfunc.master.qp0_state[port].qp0_active = 0;
143 mailbox = mlx4_alloc_cmd_mailbox(dev);
145 return PTR_ERR(mailbox);
147 if (cur_state == MLX4_QP_STATE_RST && new_state == MLX4_QP_STATE_INIT) {
148 u64 mtt_addr = mlx4_mtt_addr(dev, mtt);
149 context->mtt_base_addr_h = mtt_addr >> 32;
150 context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
151 context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
154 *(__be32 *) mailbox->buf = cpu_to_be32(optpar);
155 memcpy(mailbox->buf + 8, context, sizeof *context);
157 ((struct mlx4_qp_context *) (mailbox->buf + 8))->local_qpn =
158 cpu_to_be32(qp->qpn);
160 ret = mlx4_cmd(dev, mailbox->dma,
161 qp->qpn | (!!sqd_event << 31),
162 new_state == MLX4_QP_STATE_RST ? 2 : 0,
163 op[cur_state][new_state], MLX4_CMD_TIME_CLASS_C, native);
165 mlx4_free_cmd_mailbox(dev, mailbox);
169 int mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
170 enum mlx4_qp_state cur_state, enum mlx4_qp_state new_state,
171 struct mlx4_qp_context *context,
172 enum mlx4_qp_optpar optpar,
173 int sqd_event, struct mlx4_qp *qp)
175 return __mlx4_qp_modify(dev, mtt, cur_state, new_state, context,
176 optpar, sqd_event, qp, 0);
178 EXPORT_SYMBOL_GPL(mlx4_qp_modify);
180 int __mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align,
183 struct mlx4_priv *priv = mlx4_priv(dev);
184 struct mlx4_qp_table *qp_table = &priv->qp_table;
186 *base = mlx4_bitmap_alloc_range(&qp_table->bitmap, cnt, align);
193 int mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align, int *base)
199 if (mlx4_is_mfunc(dev)) {
200 set_param_l(&in_param, cnt);
201 set_param_h(&in_param, align);
202 err = mlx4_cmd_imm(dev, in_param, &out_param,
203 RES_QP, RES_OP_RESERVE,
205 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
209 *base = get_param_l(&out_param);
212 return __mlx4_qp_reserve_range(dev, cnt, align, base);
214 EXPORT_SYMBOL_GPL(mlx4_qp_reserve_range);
216 void __mlx4_qp_release_range(struct mlx4_dev *dev, int base_qpn, int cnt)
218 struct mlx4_priv *priv = mlx4_priv(dev);
219 struct mlx4_qp_table *qp_table = &priv->qp_table;
221 if (mlx4_is_qp_reserved(dev, (u32) base_qpn))
223 mlx4_bitmap_free_range(&qp_table->bitmap, base_qpn, cnt);
226 void mlx4_qp_release_range(struct mlx4_dev *dev, int base_qpn, int cnt)
231 if (mlx4_is_mfunc(dev)) {
232 set_param_l(&in_param, base_qpn);
233 set_param_h(&in_param, cnt);
234 err = mlx4_cmd(dev, in_param, RES_QP, RES_OP_RESERVE,
236 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
238 mlx4_warn(dev, "Failed to release qp range"
239 " base:%d cnt:%d\n", base_qpn, cnt);
242 __mlx4_qp_release_range(dev, base_qpn, cnt);
244 EXPORT_SYMBOL_GPL(mlx4_qp_release_range);
246 int __mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn)
248 struct mlx4_priv *priv = mlx4_priv(dev);
249 struct mlx4_qp_table *qp_table = &priv->qp_table;
252 err = mlx4_table_get(dev, &qp_table->qp_table, qpn);
256 err = mlx4_table_get(dev, &qp_table->auxc_table, qpn);
260 err = mlx4_table_get(dev, &qp_table->altc_table, qpn);
264 err = mlx4_table_get(dev, &qp_table->rdmarc_table, qpn);
268 err = mlx4_table_get(dev, &qp_table->cmpt_table, qpn);
275 mlx4_table_put(dev, &qp_table->rdmarc_table, qpn);
278 mlx4_table_put(dev, &qp_table->altc_table, qpn);
281 mlx4_table_put(dev, &qp_table->auxc_table, qpn);
284 mlx4_table_put(dev, &qp_table->qp_table, qpn);
290 static int mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn)
294 if (mlx4_is_mfunc(dev)) {
295 set_param_l(¶m, qpn);
296 return mlx4_cmd_imm(dev, param, ¶m, RES_QP, RES_OP_MAP_ICM,
297 MLX4_CMD_ALLOC_RES, MLX4_CMD_TIME_CLASS_A,
300 return __mlx4_qp_alloc_icm(dev, qpn);
303 void __mlx4_qp_free_icm(struct mlx4_dev *dev, int qpn)
305 struct mlx4_priv *priv = mlx4_priv(dev);
306 struct mlx4_qp_table *qp_table = &priv->qp_table;
308 mlx4_table_put(dev, &qp_table->cmpt_table, qpn);
309 mlx4_table_put(dev, &qp_table->rdmarc_table, qpn);
310 mlx4_table_put(dev, &qp_table->altc_table, qpn);
311 mlx4_table_put(dev, &qp_table->auxc_table, qpn);
312 mlx4_table_put(dev, &qp_table->qp_table, qpn);
315 static void mlx4_qp_free_icm(struct mlx4_dev *dev, int qpn)
319 if (mlx4_is_mfunc(dev)) {
320 set_param_l(&in_param, qpn);
321 if (mlx4_cmd(dev, in_param, RES_QP, RES_OP_MAP_ICM,
322 MLX4_CMD_FREE_RES, MLX4_CMD_TIME_CLASS_A,
324 mlx4_warn(dev, "Failed to free icm of qp:%d\n", qpn);
326 __mlx4_qp_free_icm(dev, qpn);
329 int mlx4_qp_alloc(struct mlx4_dev *dev, int qpn, struct mlx4_qp *qp)
331 struct mlx4_priv *priv = mlx4_priv(dev);
332 struct mlx4_qp_table *qp_table = &priv->qp_table;
340 err = mlx4_qp_alloc_icm(dev, qpn);
344 spin_lock_irq(&qp_table->lock);
345 err = radix_tree_insert(&dev->qp_table_tree, qp->qpn &
346 (dev->caps.num_qps - 1), qp);
347 spin_unlock_irq(&qp_table->lock);
351 atomic_set(&qp->refcount, 1);
352 init_completion(&qp->free);
357 mlx4_qp_free_icm(dev, qpn);
361 EXPORT_SYMBOL_GPL(mlx4_qp_alloc);
363 void mlx4_qp_remove(struct mlx4_dev *dev, struct mlx4_qp *qp)
365 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
368 spin_lock_irqsave(&qp_table->lock, flags);
369 radix_tree_delete(&dev->qp_table_tree, qp->qpn & (dev->caps.num_qps - 1));
370 spin_unlock_irqrestore(&qp_table->lock, flags);
372 EXPORT_SYMBOL_GPL(mlx4_qp_remove);
374 void mlx4_qp_free(struct mlx4_dev *dev, struct mlx4_qp *qp)
376 if (atomic_dec_and_test(&qp->refcount))
378 wait_for_completion(&qp->free);
380 mlx4_qp_free_icm(dev, qp->qpn);
382 EXPORT_SYMBOL_GPL(mlx4_qp_free);
384 static int mlx4_CONF_SPECIAL_QP(struct mlx4_dev *dev, u32 base_qpn)
386 return mlx4_cmd(dev, 0, base_qpn, 0, MLX4_CMD_CONF_SPECIAL_QP,
387 MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
390 int mlx4_init_qp_table(struct mlx4_dev *dev)
392 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
394 int reserved_from_top = 0;
396 spin_lock_init(&qp_table->lock);
397 INIT_RADIX_TREE(&dev->qp_table_tree, GFP_ATOMIC);
398 if (mlx4_is_slave(dev))
402 * We reserve 2 extra QPs per port for the special QPs. The
403 * block of special QPs must be aligned to a multiple of 8, so
406 * We also reserve the MSB of the 24-bit QP number to indicate
407 * that a QP is an XRC QP.
409 dev->caps.sqp_start =
410 ALIGN(dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW], 8);
413 int sort[MLX4_NUM_QP_REGION];
415 int last_base = dev->caps.num_qps;
417 for (i = 1; i < MLX4_NUM_QP_REGION; ++i)
420 for (i = MLX4_NUM_QP_REGION; i > 0; --i) {
421 for (j = 2; j < i; ++j) {
422 if (dev->caps.reserved_qps_cnt[sort[j]] >
423 dev->caps.reserved_qps_cnt[sort[j - 1]]) {
425 sort[j] = sort[j - 1];
431 for (i = 1; i < MLX4_NUM_QP_REGION; ++i) {
432 last_base -= dev->caps.reserved_qps_cnt[sort[i]];
433 dev->caps.reserved_qps_base[sort[i]] = last_base;
435 dev->caps.reserved_qps_cnt[sort[i]];
440 err = mlx4_bitmap_init(&qp_table->bitmap, dev->caps.num_qps,
441 (1 << 23) - 1, dev->caps.sqp_start + 8,
446 return mlx4_CONF_SPECIAL_QP(dev, dev->caps.sqp_start);
449 void mlx4_cleanup_qp_table(struct mlx4_dev *dev)
451 if (mlx4_is_slave(dev))
454 mlx4_CONF_SPECIAL_QP(dev, 0);
455 mlx4_bitmap_cleanup(&mlx4_priv(dev)->qp_table.bitmap);
458 int mlx4_qp_query(struct mlx4_dev *dev, struct mlx4_qp *qp,
459 struct mlx4_qp_context *context)
461 struct mlx4_cmd_mailbox *mailbox;
464 mailbox = mlx4_alloc_cmd_mailbox(dev);
466 return PTR_ERR(mailbox);
468 err = mlx4_cmd_box(dev, 0, mailbox->dma, qp->qpn, 0,
469 MLX4_CMD_QUERY_QP, MLX4_CMD_TIME_CLASS_A,
472 memcpy(context, mailbox->buf + 8, sizeof *context);
474 mlx4_free_cmd_mailbox(dev, mailbox);
477 EXPORT_SYMBOL_GPL(mlx4_qp_query);
479 int mlx4_qp_to_ready(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
480 struct mlx4_qp_context *context,
481 struct mlx4_qp *qp, enum mlx4_qp_state *qp_state)
485 enum mlx4_qp_state states[] = {
492 for (i = 0; i < ARRAY_SIZE(states) - 1; i++) {
493 context->flags &= cpu_to_be32(~(0xf << 28));
494 context->flags |= cpu_to_be32(states[i + 1] << 28);
495 err = mlx4_qp_modify(dev, mtt, states[i], states[i + 1],
498 mlx4_err(dev, "Failed to bring QP to state: "
499 "%d with error: %d\n",
504 *qp_state = states[i + 1];
509 EXPORT_SYMBOL_GPL(mlx4_qp_to_ready);