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36#include <linux/mlx4/cmd.h>
37#include <linux/mlx4/qp.h>
38
39#include "mlx4.h"
40#include "icm.h"
41
42void mlx4_qp_event(struct mlx4_dev *dev, u32 qpn, int event_type)
43{
44 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
45 struct mlx4_qp *qp;
46
47 spin_lock(&qp_table->lock);
48
49 qp = __mlx4_qp_lookup(dev, qpn);
50 if (qp)
51 atomic_inc(&qp->refcount);
52
53 spin_unlock(&qp_table->lock);
54
55 if (!qp) {
56 mlx4_warn(dev, "Async event for bogus QP %08x\n", qpn);
57 return;
58 }
59
60 qp->event(qp, event_type);
61
62 if (atomic_dec_and_test(&qp->refcount))
63 complete(&qp->free);
64}
65
66int mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
67 enum mlx4_qp_state cur_state, enum mlx4_qp_state new_state,
68 struct mlx4_qp_context *context, enum mlx4_qp_optpar optpar,
69 int sqd_event, struct mlx4_qp *qp)
70{
71 static const u16 op[MLX4_QP_NUM_STATE][MLX4_QP_NUM_STATE] = {
72 [MLX4_QP_STATE_RST] = {
73 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
74 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
75 [MLX4_QP_STATE_INIT] = MLX4_CMD_RST2INIT_QP,
76 },
77 [MLX4_QP_STATE_INIT] = {
78 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
79 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
80 [MLX4_QP_STATE_INIT] = MLX4_CMD_INIT2INIT_QP,
81 [MLX4_QP_STATE_RTR] = MLX4_CMD_INIT2RTR_QP,
82 },
83 [MLX4_QP_STATE_RTR] = {
84 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
85 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
86 [MLX4_QP_STATE_RTS] = MLX4_CMD_RTR2RTS_QP,
87 },
88 [MLX4_QP_STATE_RTS] = {
89 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
90 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
91 [MLX4_QP_STATE_RTS] = MLX4_CMD_RTS2RTS_QP,
92 [MLX4_QP_STATE_SQD] = MLX4_CMD_RTS2SQD_QP,
93 },
94 [MLX4_QP_STATE_SQD] = {
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_SQD2RTS_QP,
98 [MLX4_QP_STATE_SQD] = MLX4_CMD_SQD2SQD_QP,
99 },
100 [MLX4_QP_STATE_SQER] = {
101 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
102 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
103 [MLX4_QP_STATE_RTS] = MLX4_CMD_SQERR2RTS_QP,
104 },
105 [MLX4_QP_STATE_ERR] = {
106 [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP,
107 [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP,
108 }
109 };
110
111 struct mlx4_cmd_mailbox *mailbox;
112 int ret = 0;
113
114 if (cur_state >= MLX4_QP_NUM_STATE || new_state >= MLX4_QP_NUM_STATE ||
115 !op[cur_state][new_state])
116 return -EINVAL;
117
118 if (op[cur_state][new_state] == MLX4_CMD_2RST_QP)
119 return mlx4_cmd(dev, 0, qp->qpn, 2,
120 MLX4_CMD_2RST_QP, MLX4_CMD_TIME_CLASS_A);
121
122 mailbox = mlx4_alloc_cmd_mailbox(dev);
123 if (IS_ERR(mailbox))
124 return PTR_ERR(mailbox);
125
126 if (cur_state == MLX4_QP_STATE_RST && new_state == MLX4_QP_STATE_INIT) {
127 u64 mtt_addr = mlx4_mtt_addr(dev, mtt);
128 context->mtt_base_addr_h = mtt_addr >> 32;
129 context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
130 context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
131 }
132
133 *(__be32 *) mailbox->buf = cpu_to_be32(optpar);
134 memcpy(mailbox->buf + 8, context, sizeof *context);
135
136 ((struct mlx4_qp_context *) (mailbox->buf + 8))->local_qpn =
137 cpu_to_be32(qp->qpn);
138
139 ret = mlx4_cmd(dev, mailbox->dma, qp->qpn | (!!sqd_event << 31),
140 new_state == MLX4_QP_STATE_RST ? 2 : 0,
141 op[cur_state][new_state], MLX4_CMD_TIME_CLASS_C);
142
143 mlx4_free_cmd_mailbox(dev, mailbox);
144 return ret;
145}
146EXPORT_SYMBOL_GPL(mlx4_qp_modify);
147
148int mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align, int *base)
149{
150 struct mlx4_priv *priv = mlx4_priv(dev);
151 struct mlx4_qp_table *qp_table = &priv->qp_table;
152 int qpn;
153
154 qpn = mlx4_bitmap_alloc_range(&qp_table->bitmap, cnt, align);
155 if (qpn == -1)
156 return -ENOMEM;
157
158 *base = qpn;
159 return 0;
160}
161EXPORT_SYMBOL_GPL(mlx4_qp_reserve_range);
162
163void mlx4_qp_release_range(struct mlx4_dev *dev, int base_qpn, int cnt)
164{
165 struct mlx4_priv *priv = mlx4_priv(dev);
166 struct mlx4_qp_table *qp_table = &priv->qp_table;
167 if (base_qpn < dev->caps.sqp_start + 8)
168 return;
169
170 mlx4_bitmap_free_range(&qp_table->bitmap, base_qpn, cnt);
171}
172EXPORT_SYMBOL_GPL(mlx4_qp_release_range);
173
174int mlx4_qp_alloc(struct mlx4_dev *dev, int qpn, struct mlx4_qp *qp)
175{
176 struct mlx4_priv *priv = mlx4_priv(dev);
177 struct mlx4_qp_table *qp_table = &priv->qp_table;
178 int err;
179
180 if (!qpn)
181 return -EINVAL;
182
183 qp->qpn = qpn;
184
185 err = mlx4_table_get(dev, &qp_table->qp_table, qp->qpn);
186 if (err)
187 goto err_out;
188
189 err = mlx4_table_get(dev, &qp_table->auxc_table, qp->qpn);
190 if (err)
191 goto err_put_qp;
192
193 err = mlx4_table_get(dev, &qp_table->altc_table, qp->qpn);
194 if (err)
195 goto err_put_auxc;
196
197 err = mlx4_table_get(dev, &qp_table->rdmarc_table, qp->qpn);
198 if (err)
199 goto err_put_altc;
200
201 err = mlx4_table_get(dev, &qp_table->cmpt_table, qp->qpn);
202 if (err)
203 goto err_put_rdmarc;
204
205 spin_lock_irq(&qp_table->lock);
206 err = radix_tree_insert(&dev->qp_table_tree, qp->qpn & (dev->caps.num_qps - 1), qp);
207 spin_unlock_irq(&qp_table->lock);
208 if (err)
209 goto err_put_cmpt;
210
211 atomic_set(&qp->refcount, 1);
212 init_completion(&qp->free);
213
214 return 0;
215
216err_put_cmpt:
217 mlx4_table_put(dev, &qp_table->cmpt_table, qp->qpn);
218
219err_put_rdmarc:
220 mlx4_table_put(dev, &qp_table->rdmarc_table, qp->qpn);
221
222err_put_altc:
223 mlx4_table_put(dev, &qp_table->altc_table, qp->qpn);
224
225err_put_auxc:
226 mlx4_table_put(dev, &qp_table->auxc_table, qp->qpn);
227
228err_put_qp:
229 mlx4_table_put(dev, &qp_table->qp_table, qp->qpn);
230
231err_out:
232 return err;
233}
234EXPORT_SYMBOL_GPL(mlx4_qp_alloc);
235
236void mlx4_qp_remove(struct mlx4_dev *dev, struct mlx4_qp *qp)
237{
238 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
239 unsigned long flags;
240
241 spin_lock_irqsave(&qp_table->lock, flags);
242 radix_tree_delete(&dev->qp_table_tree, qp->qpn & (dev->caps.num_qps - 1));
243 spin_unlock_irqrestore(&qp_table->lock, flags);
244}
245EXPORT_SYMBOL_GPL(mlx4_qp_remove);
246
247void mlx4_qp_free(struct mlx4_dev *dev, struct mlx4_qp *qp)
248{
249 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
250
251 if (atomic_dec_and_test(&qp->refcount))
252 complete(&qp->free);
253 wait_for_completion(&qp->free);
254
255 mlx4_table_put(dev, &qp_table->cmpt_table, qp->qpn);
256 mlx4_table_put(dev, &qp_table->rdmarc_table, qp->qpn);
257 mlx4_table_put(dev, &qp_table->altc_table, qp->qpn);
258 mlx4_table_put(dev, &qp_table->auxc_table, qp->qpn);
259 mlx4_table_put(dev, &qp_table->qp_table, qp->qpn);
260}
261EXPORT_SYMBOL_GPL(mlx4_qp_free);
262
263static int mlx4_CONF_SPECIAL_QP(struct mlx4_dev *dev, u32 base_qpn)
264{
265 return mlx4_cmd(dev, 0, base_qpn, 0, MLX4_CMD_CONF_SPECIAL_QP,
266 MLX4_CMD_TIME_CLASS_B);
267}
268
269int mlx4_init_qp_table(struct mlx4_dev *dev)
270{
271 struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
272 int err;
273 int reserved_from_top = 0;
274
275 spin_lock_init(&qp_table->lock);
276 INIT_RADIX_TREE(&dev->qp_table_tree, GFP_ATOMIC);
277
278
279
280
281
282
283 dev->caps.sqp_start =
284 ALIGN(dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW], 8);
285
286 {
287 int sort[MLX4_NUM_QP_REGION];
288 int i, j, tmp;
289 int last_base = dev->caps.num_qps;
290
291 for (i = 1; i < MLX4_NUM_QP_REGION; ++i)
292 sort[i] = i;
293
294 for (i = MLX4_NUM_QP_REGION; i > 0; --i) {
295 for (j = 2; j < i; ++j) {
296 if (dev->caps.reserved_qps_cnt[sort[j]] >
297 dev->caps.reserved_qps_cnt[sort[j - 1]]) {
298 tmp = sort[j];
299 sort[j] = sort[j - 1];
300 sort[j - 1] = tmp;
301 }
302 }
303 }
304
305 for (i = 1; i < MLX4_NUM_QP_REGION; ++i) {
306 last_base -= dev->caps.reserved_qps_cnt[sort[i]];
307 dev->caps.reserved_qps_base[sort[i]] = last_base;
308 reserved_from_top +=
309 dev->caps.reserved_qps_cnt[sort[i]];
310 }
311
312 }
313
314 err = mlx4_bitmap_init(&qp_table->bitmap, dev->caps.num_qps,
315 (1 << 23) - 1, dev->caps.sqp_start + 8,
316 reserved_from_top);
317 if (err)
318 return err;
319
320 return mlx4_CONF_SPECIAL_QP(dev, dev->caps.sqp_start);
321}
322
323void mlx4_cleanup_qp_table(struct mlx4_dev *dev)
324{
325 mlx4_CONF_SPECIAL_QP(dev, 0);
326 mlx4_bitmap_cleanup(&mlx4_priv(dev)->qp_table.bitmap);
327}
328
329int mlx4_qp_query(struct mlx4_dev *dev, struct mlx4_qp *qp,
330 struct mlx4_qp_context *context)
331{
332 struct mlx4_cmd_mailbox *mailbox;
333 int err;
334
335 mailbox = mlx4_alloc_cmd_mailbox(dev);
336 if (IS_ERR(mailbox))
337 return PTR_ERR(mailbox);
338
339 err = mlx4_cmd_box(dev, 0, mailbox->dma, qp->qpn, 0,
340 MLX4_CMD_QUERY_QP, MLX4_CMD_TIME_CLASS_A);
341 if (!err)
342 memcpy(context, mailbox->buf + 8, sizeof *context);
343
344 mlx4_free_cmd_mailbox(dev, mailbox);
345 return err;
346}
347EXPORT_SYMBOL_GPL(mlx4_qp_query);
348
349int mlx4_qp_to_ready(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
350 struct mlx4_qp_context *context,
351 struct mlx4_qp *qp, enum mlx4_qp_state *qp_state)
352{
353 int err;
354 int i;
355 enum mlx4_qp_state states[] = {
356 MLX4_QP_STATE_RST,
357 MLX4_QP_STATE_INIT,
358 MLX4_QP_STATE_RTR,
359 MLX4_QP_STATE_RTS
360 };
361
362 for (i = 0; i < ARRAY_SIZE(states) - 1; i++) {
363 context->flags &= cpu_to_be32(~(0xf << 28));
364 context->flags |= cpu_to_be32(states[i + 1] << 28);
365 err = mlx4_qp_modify(dev, mtt, states[i], states[i + 1],
366 context, 0, 0, qp);
367 if (err) {
368 mlx4_err(dev, "Failed to bring QP to state: "
369 "%d with error: %d\n",
370 states[i + 1], err);
371 return err;
372 }
373
374 *qp_state = states[i + 1];
375 }
376
377 return 0;
378}
379EXPORT_SYMBOL_GPL(mlx4_qp_to_ready);
380
