1 /*
2 * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
3 * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34 #include <linux/interrupt.h>
35 #include <linux/slab.h>
36 #include <linux/export.h>
37 #include <linux/mm.h>
38 #include <linux/dma-mapping.h>
39
40 #include <linux/mlx4/cmd.h>
41 #include <linux/cpu_rmap.h>
42
43 #include "mlx4.h"
44 #include "fw.h"
45
46 enum {
47 MLX4_IRQNAME_SIZE = 32
48 };
49
50 enum {
51 MLX4_NUM_ASYNC_EQE = 0x100,
52 MLX4_NUM_SPARE_EQE = 0x80,
53 MLX4_EQ_ENTRY_SIZE = 0x20
54 };
55
56 #define MLX4_EQ_STATUS_OK ( 0 << 28)
57 #define MLX4_EQ_STATUS_WRITE_FAIL (10 << 28)
58 #define MLX4_EQ_OWNER_SW ( 0 << 24)
59 #define MLX4_EQ_OWNER_HW ( 1 << 24)
60 #define MLX4_EQ_FLAG_EC ( 1 << 18)
61 #define MLX4_EQ_FLAG_OI ( 1 << 17)
62 #define MLX4_EQ_STATE_ARMED ( 9 << 8)
63 #define MLX4_EQ_STATE_FIRED (10 << 8)
64 #define MLX4_EQ_STATE_ALWAYS_ARMED (11 << 8)
65
66 #define MLX4_ASYNC_EVENT_MASK ((1ull << MLX4_EVENT_TYPE_PATH_MIG) | \
67 (1ull << MLX4_EVENT_TYPE_COMM_EST) | \
68 (1ull << MLX4_EVENT_TYPE_SQ_DRAINED) | \
69 (1ull << MLX4_EVENT_TYPE_CQ_ERROR) | \
70 (1ull << MLX4_EVENT_TYPE_WQ_CATAS_ERROR) | \
71 (1ull << MLX4_EVENT_TYPE_EEC_CATAS_ERROR) | \
72 (1ull << MLX4_EVENT_TYPE_PATH_MIG_FAILED) | \
73 (1ull << MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | \
74 (1ull << MLX4_EVENT_TYPE_WQ_ACCESS_ERROR) | \
75 (1ull << MLX4_EVENT_TYPE_PORT_CHANGE) | \
76 (1ull << MLX4_EVENT_TYPE_ECC_DETECT) | \
77 (1ull << MLX4_EVENT_TYPE_SRQ_CATAS_ERROR) | \
78 (1ull << MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE) | \
79 (1ull << MLX4_EVENT_TYPE_SRQ_LIMIT) | \
80 (1ull << MLX4_EVENT_TYPE_CMD) | \
81 (1ull << MLX4_EVENT_TYPE_OP_REQUIRED) | \
82 (1ull << MLX4_EVENT_TYPE_COMM_CHANNEL) | \
83 (1ull << MLX4_EVENT_TYPE_FLR_EVENT) | \
84 (1ull << MLX4_EVENT_TYPE_FATAL_WARNING))
85
get_async_ev_mask(struct mlx4_dev * dev)86 static u64 get_async_ev_mask(struct mlx4_dev *dev)
87 {
88 u64 async_ev_mask = MLX4_ASYNC_EVENT_MASK;
89 if (dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)
90 async_ev_mask |= (1ull << MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT);
91 if (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_RECOVERABLE_ERROR_EVENT)
92 async_ev_mask |= (1ull << MLX4_EVENT_TYPE_RECOVERABLE_ERROR_EVENT);
93
94 return async_ev_mask;
95 }
96
eq_set_ci(struct mlx4_eq * eq,int req_not)97 static void eq_set_ci(struct mlx4_eq *eq, int req_not)
98 {
99 __raw_writel((__force u32) cpu_to_be32((eq->cons_index & 0xffffff) |
100 req_not << 31),
101 eq->doorbell);
102 /* We still want ordering, just not swabbing, so add a barrier */
103 wmb();
104 }
105
get_eqe(struct mlx4_eq * eq,u32 entry,u8 eqe_factor,u8 eqe_size)106 static struct mlx4_eqe *get_eqe(struct mlx4_eq *eq, u32 entry, u8 eqe_factor,
107 u8 eqe_size)
108 {
109 /* (entry & (eq->nent - 1)) gives us a cyclic array */
110 unsigned long offset = (entry & (eq->nent - 1)) * eqe_size;
111 /* CX3 is capable of extending the EQE from 32 to 64 bytes with
112 * strides of 64B,128B and 256B.
113 * When 64B EQE is used, the first (in the lower addresses)
114 * 32 bytes in the 64 byte EQE are reserved and the next 32 bytes
115 * contain the legacy EQE information.
116 * In all other cases, the first 32B contains the legacy EQE info.
117 */
118 return eq->page_list[offset / PAGE_SIZE].buf + (offset + (eqe_factor ? MLX4_EQ_ENTRY_SIZE : 0)) % PAGE_SIZE;
119 }
120
next_eqe_sw(struct mlx4_eq * eq,u8 eqe_factor,u8 size)121 static struct mlx4_eqe *next_eqe_sw(struct mlx4_eq *eq, u8 eqe_factor, u8 size)
122 {
123 struct mlx4_eqe *eqe = get_eqe(eq, eq->cons_index, eqe_factor, size);
124 return !!(eqe->owner & 0x80) ^ !!(eq->cons_index & eq->nent) ? NULL : eqe;
125 }
126
next_slave_event_eqe(struct mlx4_slave_event_eq * slave_eq)127 static struct mlx4_eqe *next_slave_event_eqe(struct mlx4_slave_event_eq *slave_eq)
128 {
129 struct mlx4_eqe *eqe =
130 &slave_eq->event_eqe[slave_eq->cons & (SLAVE_EVENT_EQ_SIZE - 1)];
131 return (!!(eqe->owner & 0x80) ^
132 !!(slave_eq->cons & SLAVE_EVENT_EQ_SIZE)) ?
133 eqe : NULL;
134 }
135
mlx4_gen_slave_eqe(struct work_struct * work)136 void mlx4_gen_slave_eqe(struct work_struct *work)
137 {
138 struct mlx4_mfunc_master_ctx *master =
139 container_of(work, struct mlx4_mfunc_master_ctx,
140 slave_event_work);
141 struct mlx4_mfunc *mfunc =
142 container_of(master, struct mlx4_mfunc, master);
143 struct mlx4_priv *priv = container_of(mfunc, struct mlx4_priv, mfunc);
144 struct mlx4_dev *dev = &priv->dev;
145 struct mlx4_slave_event_eq *slave_eq = &mfunc->master.slave_eq;
146 struct mlx4_eqe *eqe;
147 u8 slave;
148 int i, phys_port, slave_port;
149
150 for (eqe = next_slave_event_eqe(slave_eq); eqe;
151 eqe = next_slave_event_eqe(slave_eq)) {
152 slave = eqe->slave_id;
153
154 if (eqe->type == MLX4_EVENT_TYPE_PORT_CHANGE &&
155 eqe->subtype == MLX4_PORT_CHANGE_SUBTYPE_DOWN &&
156 mlx4_is_bonded(dev)) {
157 struct mlx4_port_cap port_cap;
158
159 if (!mlx4_QUERY_PORT(dev, 1, &port_cap) && port_cap.link_state)
160 goto consume;
161
162 if (!mlx4_QUERY_PORT(dev, 2, &port_cap) && port_cap.link_state)
163 goto consume;
164 }
165 /* All active slaves need to receive the event */
166 if (slave == ALL_SLAVES) {
167 for (i = 0; i <= dev->persist->num_vfs; i++) {
168 phys_port = 0;
169 if (eqe->type == MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT &&
170 eqe->subtype == MLX4_DEV_PMC_SUBTYPE_PORT_INFO) {
171 phys_port = eqe->event.port_mgmt_change.port;
172 slave_port = mlx4_phys_to_slave_port(dev, i, phys_port);
173 if (slave_port < 0) /* VF doesn't have this port */
174 continue;
175 eqe->event.port_mgmt_change.port = slave_port;
176 }
177 if (mlx4_GEN_EQE(dev, i, eqe))
178 mlx4_warn(dev, "Failed to generate event for slave %d\n",
179 i);
180 if (phys_port)
181 eqe->event.port_mgmt_change.port = phys_port;
182 }
183 } else {
184 if (mlx4_GEN_EQE(dev, slave, eqe))
185 mlx4_warn(dev, "Failed to generate event for slave %d\n",
186 slave);
187 }
188 consume:
189 ++slave_eq->cons;
190 }
191 }
192
193
slave_event(struct mlx4_dev * dev,u8 slave,struct mlx4_eqe * eqe)194 static void slave_event(struct mlx4_dev *dev, u8 slave, struct mlx4_eqe *eqe)
195 {
196 struct mlx4_priv *priv = mlx4_priv(dev);
197 struct mlx4_slave_event_eq *slave_eq = &priv->mfunc.master.slave_eq;
198 struct mlx4_eqe *s_eqe;
199 unsigned long flags;
200
201 spin_lock_irqsave(&slave_eq->event_lock, flags);
202 s_eqe = &slave_eq->event_eqe[slave_eq->prod & (SLAVE_EVENT_EQ_SIZE - 1)];
203 if ((!!(s_eqe->owner & 0x80)) ^
204 (!!(slave_eq->prod & SLAVE_EVENT_EQ_SIZE))) {
205 mlx4_warn(dev, "Master failed to generate an EQE for slave: %d. No free EQE on slave events queue\n",
206 slave);
207 spin_unlock_irqrestore(&slave_eq->event_lock, flags);
208 return;
209 }
210
211 memcpy(s_eqe, eqe, sizeof(struct mlx4_eqe) - 1);
212 s_eqe->slave_id = slave;
213 /* ensure all information is written before setting the ownersip bit */
214 dma_wmb();
215 s_eqe->owner = !!(slave_eq->prod & SLAVE_EVENT_EQ_SIZE) ? 0x0 : 0x80;
216 ++slave_eq->prod;
217
218 queue_work(priv->mfunc.master.comm_wq,
219 &priv->mfunc.master.slave_event_work);
220 spin_unlock_irqrestore(&slave_eq->event_lock, flags);
221 }
222
mlx4_slave_event(struct mlx4_dev * dev,int slave,struct mlx4_eqe * eqe)223 static void mlx4_slave_event(struct mlx4_dev *dev, int slave,
224 struct mlx4_eqe *eqe)
225 {
226 struct mlx4_priv *priv = mlx4_priv(dev);
227
228 if (slave < 0 || slave > dev->persist->num_vfs ||
229 slave == dev->caps.function ||
230 !priv->mfunc.master.slave_state[slave].active)
231 return;
232
233 slave_event(dev, slave, eqe);
234 }
235
236 #if defined(CONFIG_SMP)
mlx4_set_eq_affinity_hint(struct mlx4_priv * priv,int vec)237 static void mlx4_set_eq_affinity_hint(struct mlx4_priv *priv, int vec)
238 {
239 int hint_err;
240 struct mlx4_dev *dev = &priv->dev;
241 struct mlx4_eq *eq = &priv->eq_table.eq[vec];
242
243 if (!cpumask_available(eq->affinity_mask) ||
244 cpumask_empty(eq->affinity_mask))
245 return;
246
247 hint_err = irq_update_affinity_hint(eq->irq, eq->affinity_mask);
248 if (hint_err)
249 mlx4_warn(dev, "irq_update_affinity_hint failed, err %d\n", hint_err);
250 }
251 #endif
252
mlx4_gen_pkey_eqe(struct mlx4_dev * dev,int slave,u8 port)253 int mlx4_gen_pkey_eqe(struct mlx4_dev *dev, int slave, u8 port)
254 {
255 struct mlx4_eqe eqe;
256
257 struct mlx4_priv *priv = mlx4_priv(dev);
258 struct mlx4_slave_state *s_slave = &priv->mfunc.master.slave_state[slave];
259
260 if (!s_slave->active)
261 return 0;
262
263 memset(&eqe, 0, sizeof(eqe));
264
265 eqe.type = MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT;
266 eqe.subtype = MLX4_DEV_PMC_SUBTYPE_PKEY_TABLE;
267 eqe.event.port_mgmt_change.port = mlx4_phys_to_slave_port(dev, slave, port);
268
269 return mlx4_GEN_EQE(dev, slave, &eqe);
270 }
271 EXPORT_SYMBOL(mlx4_gen_pkey_eqe);
272
mlx4_gen_guid_change_eqe(struct mlx4_dev * dev,int slave,u8 port)273 int mlx4_gen_guid_change_eqe(struct mlx4_dev *dev, int slave, u8 port)
274 {
275 struct mlx4_eqe eqe;
276
277 /*don't send if we don't have the that slave */
278 if (dev->persist->num_vfs < slave)
279 return 0;
280 memset(&eqe, 0, sizeof(eqe));
281
282 eqe.type = MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT;
283 eqe.subtype = MLX4_DEV_PMC_SUBTYPE_GUID_INFO;
284 eqe.event.port_mgmt_change.port = mlx4_phys_to_slave_port(dev, slave, port);
285
286 return mlx4_GEN_EQE(dev, slave, &eqe);
287 }
288 EXPORT_SYMBOL(mlx4_gen_guid_change_eqe);
289
mlx4_gen_port_state_change_eqe(struct mlx4_dev * dev,int slave,u8 port,u8 port_subtype_change)290 int mlx4_gen_port_state_change_eqe(struct mlx4_dev *dev, int slave, u8 port,
291 u8 port_subtype_change)
292 {
293 struct mlx4_eqe eqe;
294 u8 slave_port = mlx4_phys_to_slave_port(dev, slave, port);
295
296 /*don't send if we don't have the that slave */
297 if (dev->persist->num_vfs < slave)
298 return 0;
299 memset(&eqe, 0, sizeof(eqe));
300
301 eqe.type = MLX4_EVENT_TYPE_PORT_CHANGE;
302 eqe.subtype = port_subtype_change;
303 eqe.event.port_change.port = cpu_to_be32(slave_port << 28);
304
305 mlx4_dbg(dev, "%s: sending: %d to slave: %d on port: %d\n", __func__,
306 port_subtype_change, slave, port);
307 return mlx4_GEN_EQE(dev, slave, &eqe);
308 }
309 EXPORT_SYMBOL(mlx4_gen_port_state_change_eqe);
310
mlx4_get_slave_port_state(struct mlx4_dev * dev,int slave,u8 port)311 enum slave_port_state mlx4_get_slave_port_state(struct mlx4_dev *dev, int slave, u8 port)
312 {
313 struct mlx4_priv *priv = mlx4_priv(dev);
314 struct mlx4_slave_state *s_state = priv->mfunc.master.slave_state;
315 struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave);
316
317 if (slave >= dev->num_slaves || port > dev->caps.num_ports ||
318 port <= 0 || !test_bit(port - 1, actv_ports.ports)) {
319 pr_err("%s: Error: asking for slave:%d, port:%d\n",
320 __func__, slave, port);
321 return SLAVE_PORT_DOWN;
322 }
323 return s_state[slave].port_state[port];
324 }
325 EXPORT_SYMBOL(mlx4_get_slave_port_state);
326
mlx4_set_slave_port_state(struct mlx4_dev * dev,int slave,u8 port,enum slave_port_state state)327 static int mlx4_set_slave_port_state(struct mlx4_dev *dev, int slave, u8 port,
328 enum slave_port_state state)
329 {
330 struct mlx4_priv *priv = mlx4_priv(dev);
331 struct mlx4_slave_state *s_state = priv->mfunc.master.slave_state;
332 struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave);
333
334 if (slave >= dev->num_slaves || port > dev->caps.num_ports ||
335 port <= 0 || !test_bit(port - 1, actv_ports.ports)) {
336 pr_err("%s: Error: asking for slave:%d, port:%d\n",
337 __func__, slave, port);
338 return -1;
339 }
340 s_state[slave].port_state[port] = state;
341
342 return 0;
343 }
344
set_all_slave_state(struct mlx4_dev * dev,u8 port,int event)345 static void set_all_slave_state(struct mlx4_dev *dev, u8 port, int event)
346 {
347 int i;
348 enum slave_port_gen_event gen_event;
349 struct mlx4_slaves_pport slaves_pport = mlx4_phys_to_slaves_pport(dev,
350 port);
351
352 for (i = 0; i < dev->persist->num_vfs + 1; i++)
353 if (test_bit(i, slaves_pport.slaves))
354 set_and_calc_slave_port_state(dev, i, port,
355 event, &gen_event);
356 }
357 /**************************************************************************
358 The function get as input the new event to that port,
359 and according to the prev state change the slave's port state.
360 The events are:
361 MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN,
362 MLX4_PORT_STATE_DEV_EVENT_PORT_UP
363 MLX4_PORT_STATE_IB_EVENT_GID_VALID
364 MLX4_PORT_STATE_IB_EVENT_GID_INVALID
365 ***************************************************************************/
set_and_calc_slave_port_state(struct mlx4_dev * dev,int slave,u8 port,int event,enum slave_port_gen_event * gen_event)366 int set_and_calc_slave_port_state(struct mlx4_dev *dev, int slave,
367 u8 port, int event,
368 enum slave_port_gen_event *gen_event)
369 {
370 struct mlx4_priv *priv = mlx4_priv(dev);
371 struct mlx4_slave_state *ctx = NULL;
372 unsigned long flags;
373 int ret = -1;
374 struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave);
375 enum slave_port_state cur_state =
376 mlx4_get_slave_port_state(dev, slave, port);
377
378 *gen_event = SLAVE_PORT_GEN_EVENT_NONE;
379
380 if (slave >= dev->num_slaves || port > dev->caps.num_ports ||
381 port <= 0 || !test_bit(port - 1, actv_ports.ports)) {
382 pr_err("%s: Error: asking for slave:%d, port:%d\n",
383 __func__, slave, port);
384 return ret;
385 }
386
387 ctx = &priv->mfunc.master.slave_state[slave];
388 spin_lock_irqsave(&ctx->lock, flags);
389
390 switch (cur_state) {
391 case SLAVE_PORT_DOWN:
392 if (MLX4_PORT_STATE_DEV_EVENT_PORT_UP == event)
393 mlx4_set_slave_port_state(dev, slave, port,
394 SLAVE_PENDING_UP);
395 break;
396 case SLAVE_PENDING_UP:
397 if (MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN == event)
398 mlx4_set_slave_port_state(dev, slave, port,
399 SLAVE_PORT_DOWN);
400 else if (MLX4_PORT_STATE_IB_PORT_STATE_EVENT_GID_VALID == event) {
401 mlx4_set_slave_port_state(dev, slave, port,
402 SLAVE_PORT_UP);
403 *gen_event = SLAVE_PORT_GEN_EVENT_UP;
404 }
405 break;
406 case SLAVE_PORT_UP:
407 if (MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN == event) {
408 mlx4_set_slave_port_state(dev, slave, port,
409 SLAVE_PORT_DOWN);
410 *gen_event = SLAVE_PORT_GEN_EVENT_DOWN;
411 } else if (MLX4_PORT_STATE_IB_EVENT_GID_INVALID ==
412 event) {
413 mlx4_set_slave_port_state(dev, slave, port,
414 SLAVE_PENDING_UP);
415 *gen_event = SLAVE_PORT_GEN_EVENT_DOWN;
416 }
417 break;
418 default:
419 pr_err("%s: BUG!!! UNKNOWN state: slave:%d, port:%d\n",
420 __func__, slave, port);
421 goto out;
422 }
423 ret = mlx4_get_slave_port_state(dev, slave, port);
424
425 out:
426 spin_unlock_irqrestore(&ctx->lock, flags);
427 return ret;
428 }
429
430 EXPORT_SYMBOL(set_and_calc_slave_port_state);
431
mlx4_gen_slaves_port_mgt_ev(struct mlx4_dev * dev,u8 port,int attr)432 int mlx4_gen_slaves_port_mgt_ev(struct mlx4_dev *dev, u8 port, int attr)
433 {
434 struct mlx4_eqe eqe;
435
436 memset(&eqe, 0, sizeof(eqe));
437
438 eqe.type = MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT;
439 eqe.subtype = MLX4_DEV_PMC_SUBTYPE_PORT_INFO;
440 eqe.event.port_mgmt_change.port = port;
441 eqe.event.port_mgmt_change.params.port_info.changed_attr =
442 cpu_to_be32((u32) attr);
443
444 slave_event(dev, ALL_SLAVES, &eqe);
445 return 0;
446 }
447 EXPORT_SYMBOL(mlx4_gen_slaves_port_mgt_ev);
448
mlx4_master_handle_slave_flr(struct work_struct * work)449 void mlx4_master_handle_slave_flr(struct work_struct *work)
450 {
451 struct mlx4_mfunc_master_ctx *master =
452 container_of(work, struct mlx4_mfunc_master_ctx,
453 slave_flr_event_work);
454 struct mlx4_mfunc *mfunc =
455 container_of(master, struct mlx4_mfunc, master);
456 struct mlx4_priv *priv =
457 container_of(mfunc, struct mlx4_priv, mfunc);
458 struct mlx4_dev *dev = &priv->dev;
459 struct mlx4_slave_state *slave_state = priv->mfunc.master.slave_state;
460 int i;
461 int err;
462 unsigned long flags;
463
464 mlx4_dbg(dev, "mlx4_handle_slave_flr\n");
465
466 for (i = 0 ; i < dev->num_slaves; i++) {
467
468 if (MLX4_COMM_CMD_FLR == slave_state[i].last_cmd) {
469 mlx4_dbg(dev, "mlx4_handle_slave_flr: clean slave: %d\n",
470 i);
471 /* In case of 'Reset flow' FLR can be generated for
472 * a slave before mlx4_load_one is done.
473 * make sure interface is up before trying to delete
474 * slave resources which weren't allocated yet.
475 */
476 if (dev->persist->interface_state &
477 MLX4_INTERFACE_STATE_UP)
478 mlx4_delete_all_resources_for_slave(dev, i);
479 /*return the slave to running mode*/
480 spin_lock_irqsave(&priv->mfunc.master.slave_state_lock, flags);
481 slave_state[i].last_cmd = MLX4_COMM_CMD_RESET;
482 slave_state[i].is_slave_going_down = 0;
483 spin_unlock_irqrestore(&priv->mfunc.master.slave_state_lock, flags);
484 /*notify the FW:*/
485 err = mlx4_cmd(dev, 0, i, 0, MLX4_CMD_INFORM_FLR_DONE,
486 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
487 if (err)
488 mlx4_warn(dev, "Failed to notify FW on FLR done (slave:%d)\n",
489 i);
490 }
491 }
492 }
493
mlx4_eq_int(struct mlx4_dev * dev,struct mlx4_eq * eq)494 static int mlx4_eq_int(struct mlx4_dev *dev, struct mlx4_eq *eq)
495 {
496 struct mlx4_priv *priv = mlx4_priv(dev);
497 struct mlx4_eqe *eqe;
498 int cqn;
499 int eqes_found = 0;
500 int set_ci = 0;
501 int port;
502 int slave = 0;
503 int ret;
504 u32 flr_slave;
505 u8 update_slave_state;
506 int i;
507 enum slave_port_gen_event gen_event;
508 unsigned long flags;
509 struct mlx4_vport_state *s_info;
510 int eqe_size = dev->caps.eqe_size;
511
512 while ((eqe = next_eqe_sw(eq, dev->caps.eqe_factor, eqe_size))) {
513 /*
514 * Make sure we read EQ entry contents after we've
515 * checked the ownership bit.
516 */
517 dma_rmb();
518
519 switch (eqe->type) {
520 case MLX4_EVENT_TYPE_COMP:
521 cqn = be32_to_cpu(eqe->event.comp.cqn) & 0xffffff;
522 mlx4_cq_completion(dev, cqn);
523 break;
524
525 case MLX4_EVENT_TYPE_PATH_MIG:
526 case MLX4_EVENT_TYPE_COMM_EST:
527 case MLX4_EVENT_TYPE_SQ_DRAINED:
528 case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
529 case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
530 case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
531 case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
532 case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
533 mlx4_dbg(dev, "event %d arrived\n", eqe->type);
534 if (mlx4_is_master(dev)) {
535 /* forward only to slave owning the QP */
536 ret = mlx4_get_slave_from_resource_id(dev,
537 RES_QP,
538 be32_to_cpu(eqe->event.qp.qpn)
539 & 0xffffff, &slave);
540 if (ret && ret != -ENOENT) {
541 mlx4_dbg(dev, "QP event %02x(%02x) on EQ %d at index %u: could not get slave id (%d)\n",
542 eqe->type, eqe->subtype,
543 eq->eqn, eq->cons_index, ret);
544 break;
545 }
546
547 if (!ret && slave != dev->caps.function) {
548 mlx4_slave_event(dev, slave, eqe);
549 break;
550 }
551
552 }
553 mlx4_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) &
554 0xffffff, eqe->type);
555 break;
556
557 case MLX4_EVENT_TYPE_SRQ_LIMIT:
558 mlx4_dbg(dev, "%s: MLX4_EVENT_TYPE_SRQ_LIMIT. srq_no=0x%x, eq 0x%x\n",
559 __func__, be32_to_cpu(eqe->event.srq.srqn),
560 eq->eqn);
561 fallthrough;
562 case MLX4_EVENT_TYPE_SRQ_CATAS_ERROR:
563 if (mlx4_is_master(dev)) {
564 /* forward only to slave owning the SRQ */
565 ret = mlx4_get_slave_from_resource_id(dev,
566 RES_SRQ,
567 be32_to_cpu(eqe->event.srq.srqn)
568 & 0xffffff,
569 &slave);
570 if (ret && ret != -ENOENT) {
571 mlx4_warn(dev, "SRQ event %02x(%02x) on EQ %d at index %u: could not get slave id (%d)\n",
572 eqe->type, eqe->subtype,
573 eq->eqn, eq->cons_index, ret);
574 break;
575 }
576 if (eqe->type ==
577 MLX4_EVENT_TYPE_SRQ_CATAS_ERROR)
578 mlx4_warn(dev, "%s: slave:%d, srq_no:0x%x, event: %02x(%02x)\n",
579 __func__, slave,
580 be32_to_cpu(eqe->event.srq.srqn),
581 eqe->type, eqe->subtype);
582
583 if (!ret && slave != dev->caps.function) {
584 if (eqe->type ==
585 MLX4_EVENT_TYPE_SRQ_CATAS_ERROR)
586 mlx4_warn(dev, "%s: sending event %02x(%02x) to slave:%d\n",
587 __func__, eqe->type,
588 eqe->subtype, slave);
589 mlx4_slave_event(dev, slave, eqe);
590 break;
591 }
592 }
593 mlx4_srq_event(dev, be32_to_cpu(eqe->event.srq.srqn) &
594 0xffffff, eqe->type);
595 break;
596
597 case MLX4_EVENT_TYPE_CMD:
598 mlx4_cmd_event(dev,
599 be16_to_cpu(eqe->event.cmd.token),
600 eqe->event.cmd.status,
601 be64_to_cpu(eqe->event.cmd.out_param));
602 break;
603
604 case MLX4_EVENT_TYPE_PORT_CHANGE: {
605 struct mlx4_slaves_pport slaves_port;
606 port = be32_to_cpu(eqe->event.port_change.port) >> 28;
607 slaves_port = mlx4_phys_to_slaves_pport(dev, port);
608 if (eqe->subtype == MLX4_PORT_CHANGE_SUBTYPE_DOWN) {
609 mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_DOWN,
610 port);
611 mlx4_priv(dev)->sense.do_sense_port[port] = 1;
612 if (!mlx4_is_master(dev))
613 break;
614 for (i = 0; i < dev->persist->num_vfs + 1;
615 i++) {
616 int reported_port = mlx4_is_bonded(dev) ? 1 : mlx4_phys_to_slave_port(dev, i, port);
617
618 if (!test_bit(i, slaves_port.slaves) && !mlx4_is_bonded(dev))
619 continue;
620 if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH) {
621 if (i == mlx4_master_func_num(dev))
622 continue;
623 mlx4_dbg(dev, "%s: Sending MLX4_PORT_CHANGE_SUBTYPE_DOWN to slave: %d, port:%d\n",
624 __func__, i, port);
625 s_info = &priv->mfunc.master.vf_oper[i].vport[port].state;
626 if (IFLA_VF_LINK_STATE_AUTO == s_info->link_state) {
627 eqe->event.port_change.port =
628 cpu_to_be32(
629 (be32_to_cpu(eqe->event.port_change.port) & 0xFFFFFFF)
630 | (reported_port << 28));
631 mlx4_slave_event(dev, i, eqe);
632 }
633 } else { /* IB port */
634 set_and_calc_slave_port_state(dev, i, port,
635 MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN,
636 &gen_event);
637 /*we can be in pending state, then do not send port_down event*/
638 if (SLAVE_PORT_GEN_EVENT_DOWN == gen_event) {
639 if (i == mlx4_master_func_num(dev))
640 continue;
641 eqe->event.port_change.port =
642 cpu_to_be32(
643 (be32_to_cpu(eqe->event.port_change.port) & 0xFFFFFFF)
644 | (mlx4_phys_to_slave_port(dev, i, port) << 28));
645 mlx4_slave_event(dev, i, eqe);
646 }
647 }
648 }
649 } else {
650 mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_UP, port);
651
652 mlx4_priv(dev)->sense.do_sense_port[port] = 0;
653
654 if (!mlx4_is_master(dev))
655 break;
656 if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
657 for (i = 0;
658 i < dev->persist->num_vfs + 1;
659 i++) {
660 int reported_port = mlx4_is_bonded(dev) ? 1 : mlx4_phys_to_slave_port(dev, i, port);
661
662 if (!test_bit(i, slaves_port.slaves) && !mlx4_is_bonded(dev))
663 continue;
664 if (i == mlx4_master_func_num(dev))
665 continue;
666 s_info = &priv->mfunc.master.vf_oper[i].vport[port].state;
667 if (IFLA_VF_LINK_STATE_AUTO == s_info->link_state) {
668 eqe->event.port_change.port =
669 cpu_to_be32(
670 (be32_to_cpu(eqe->event.port_change.port) & 0xFFFFFFF)
671 | (reported_port << 28));
672 mlx4_slave_event(dev, i, eqe);
673 }
674 }
675 else /* IB port */
676 /* port-up event will be sent to a slave when the
677 * slave's alias-guid is set. This is done in alias_GUID.c
678 */
679 set_all_slave_state(dev, port, MLX4_DEV_EVENT_PORT_UP);
680 }
681 break;
682 }
683
684 case MLX4_EVENT_TYPE_CQ_ERROR:
685 mlx4_warn(dev, "CQ %s on CQN %06x\n",
686 eqe->event.cq_err.syndrome == 1 ?
687 "overrun" : "access violation",
688 be32_to_cpu(eqe->event.cq_err.cqn) & 0xffffff);
689 if (mlx4_is_master(dev)) {
690 ret = mlx4_get_slave_from_resource_id(dev,
691 RES_CQ,
692 be32_to_cpu(eqe->event.cq_err.cqn)
693 & 0xffffff, &slave);
694 if (ret && ret != -ENOENT) {
695 mlx4_dbg(dev, "CQ event %02x(%02x) on EQ %d at index %u: could not get slave id (%d)\n",
696 eqe->type, eqe->subtype,
697 eq->eqn, eq->cons_index, ret);
698 break;
699 }
700
701 if (!ret && slave != dev->caps.function) {
702 mlx4_slave_event(dev, slave, eqe);
703 break;
704 }
705 }
706 mlx4_cq_event(dev,
707 be32_to_cpu(eqe->event.cq_err.cqn)
708 & 0xffffff,
709 eqe->type);
710 break;
711
712 case MLX4_EVENT_TYPE_EQ_OVERFLOW:
713 mlx4_warn(dev, "EQ overrun on EQN %d\n", eq->eqn);
714 break;
715
716 case MLX4_EVENT_TYPE_OP_REQUIRED:
717 atomic_inc(&priv->opreq_count);
718 /* FW commands can't be executed from interrupt context
719 * working in deferred task
720 */
721 queue_work(mlx4_wq, &priv->opreq_task);
722 break;
723
724 case MLX4_EVENT_TYPE_COMM_CHANNEL:
725 if (!mlx4_is_master(dev)) {
726 mlx4_warn(dev, "Received comm channel event for non master device\n");
727 break;
728 }
729 memcpy(&priv->mfunc.master.comm_arm_bit_vector,
730 eqe->event.comm_channel_arm.bit_vec,
731 sizeof(eqe->event.comm_channel_arm.bit_vec));
732 queue_work(priv->mfunc.master.comm_wq,
733 &priv->mfunc.master.comm_work);
734 break;
735
736 case MLX4_EVENT_TYPE_FLR_EVENT:
737 flr_slave = be32_to_cpu(eqe->event.flr_event.slave_id);
738 if (!mlx4_is_master(dev)) {
739 mlx4_warn(dev, "Non-master function received FLR event\n");
740 break;
741 }
742
743 mlx4_dbg(dev, "FLR event for slave: %d\n", flr_slave);
744
745 if (flr_slave >= dev->num_slaves) {
746 mlx4_warn(dev,
747 "Got FLR for unknown function: %d\n",
748 flr_slave);
749 update_slave_state = 0;
750 } else
751 update_slave_state = 1;
752
753 spin_lock_irqsave(&priv->mfunc.master.slave_state_lock, flags);
754 if (update_slave_state) {
755 priv->mfunc.master.slave_state[flr_slave].active = false;
756 priv->mfunc.master.slave_state[flr_slave].last_cmd = MLX4_COMM_CMD_FLR;
757 priv->mfunc.master.slave_state[flr_slave].is_slave_going_down = 1;
758 }
759 spin_unlock_irqrestore(&priv->mfunc.master.slave_state_lock, flags);
760 mlx4_dispatch_event(dev, MLX4_DEV_EVENT_SLAVE_SHUTDOWN,
761 flr_slave);
762 queue_work(priv->mfunc.master.comm_wq,
763 &priv->mfunc.master.slave_flr_event_work);
764 break;
765
766 case MLX4_EVENT_TYPE_FATAL_WARNING:
767 if (eqe->subtype == MLX4_FATAL_WARNING_SUBTYPE_WARMING) {
768 if (mlx4_is_master(dev))
769 for (i = 0; i < dev->num_slaves; i++) {
770 mlx4_dbg(dev, "%s: Sending MLX4_FATAL_WARNING_SUBTYPE_WARMING to slave: %d\n",
771 __func__, i);
772 if (i == dev->caps.function)
773 continue;
774 mlx4_slave_event(dev, i, eqe);
775 }
776 mlx4_err(dev, "Temperature Threshold was reached! Threshold: %d celsius degrees; Current Temperature: %d\n",
777 be16_to_cpu(eqe->event.warming.warning_threshold),
778 be16_to_cpu(eqe->event.warming.current_temperature));
779 } else
780 mlx4_warn(dev, "Unhandled event FATAL WARNING (%02x), subtype %02x on EQ %d at index %u. owner=%x, nent=0x%x, slave=%x, ownership=%s\n",
781 eqe->type, eqe->subtype, eq->eqn,
782 eq->cons_index, eqe->owner, eq->nent,
783 eqe->slave_id,
784 !!(eqe->owner & 0x80) ^
785 !!(eq->cons_index & eq->nent) ? "HW" : "SW");
786
787 break;
788
789 case MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT:
790 mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_MGMT_CHANGE,
791 (unsigned long) eqe);
792 break;
793
794 case MLX4_EVENT_TYPE_RECOVERABLE_ERROR_EVENT:
795 switch (eqe->subtype) {
796 case MLX4_RECOVERABLE_ERROR_EVENT_SUBTYPE_BAD_CABLE:
797 mlx4_warn(dev, "Bad cable detected on port %u\n",
798 eqe->event.bad_cable.port);
799 break;
800 case MLX4_RECOVERABLE_ERROR_EVENT_SUBTYPE_UNSUPPORTED_CABLE:
801 mlx4_warn(dev, "Unsupported cable detected\n");
802 break;
803 default:
804 mlx4_dbg(dev,
805 "Unhandled recoverable error event detected: %02x(%02x) on EQ %d at index %u. owner=%x, nent=0x%x, ownership=%s\n",
806 eqe->type, eqe->subtype, eq->eqn,
807 eq->cons_index, eqe->owner, eq->nent,
808 !!(eqe->owner & 0x80) ^
809 !!(eq->cons_index & eq->nent) ? "HW" : "SW");
810 break;
811 }
812 break;
813
814 case MLX4_EVENT_TYPE_EEC_CATAS_ERROR:
815 case MLX4_EVENT_TYPE_ECC_DETECT:
816 default:
817 mlx4_warn(dev, "Unhandled event %02x(%02x) on EQ %d at index %u. owner=%x, nent=0x%x, slave=%x, ownership=%s\n",
818 eqe->type, eqe->subtype, eq->eqn,
819 eq->cons_index, eqe->owner, eq->nent,
820 eqe->slave_id,
821 !!(eqe->owner & 0x80) ^
822 !!(eq->cons_index & eq->nent) ? "HW" : "SW");
823 break;
824 }
825
826 ++eq->cons_index;
827 eqes_found = 1;
828 ++set_ci;
829
830 /*
831 * The HCA will think the queue has overflowed if we
832 * don't tell it we've been processing events. We
833 * create our EQs with MLX4_NUM_SPARE_EQE extra
834 * entries, so we must update our consumer index at
835 * least that often.
836 */
837 if (unlikely(set_ci >= MLX4_NUM_SPARE_EQE)) {
838 eq_set_ci(eq, 0);
839 set_ci = 0;
840 }
841 }
842
843 eq_set_ci(eq, 1);
844
845 return eqes_found;
846 }
847
mlx4_interrupt(int irq,void * dev_ptr)848 static irqreturn_t mlx4_interrupt(int irq, void *dev_ptr)
849 {
850 struct mlx4_dev *dev = dev_ptr;
851 struct mlx4_priv *priv = mlx4_priv(dev);
852 int work = 0;
853 int i;
854
855 writel(priv->eq_table.clr_mask, priv->eq_table.clr_int);
856
857 for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
858 work |= mlx4_eq_int(dev, &priv->eq_table.eq[i]);
859
860 return IRQ_RETVAL(work);
861 }
862
mlx4_msi_x_interrupt(int irq,void * eq_ptr)863 static irqreturn_t mlx4_msi_x_interrupt(int irq, void *eq_ptr)
864 {
865 struct mlx4_eq *eq = eq_ptr;
866 struct mlx4_dev *dev = eq->dev;
867
868 mlx4_eq_int(dev, eq);
869
870 /* MSI-X vectors always belong to us */
871 return IRQ_HANDLED;
872 }
873
mlx4_MAP_EQ_wrapper(struct mlx4_dev * dev,int slave,struct mlx4_vhcr * vhcr,struct mlx4_cmd_mailbox * inbox,struct mlx4_cmd_mailbox * outbox,struct mlx4_cmd_info * cmd)874 int mlx4_MAP_EQ_wrapper(struct mlx4_dev *dev, int slave,
875 struct mlx4_vhcr *vhcr,
876 struct mlx4_cmd_mailbox *inbox,
877 struct mlx4_cmd_mailbox *outbox,
878 struct mlx4_cmd_info *cmd)
879 {
880 struct mlx4_priv *priv = mlx4_priv(dev);
881 struct mlx4_slave_event_eq_info *event_eq =
882 priv->mfunc.master.slave_state[slave].event_eq;
883 u32 in_modifier = vhcr->in_modifier;
884 u32 eqn = in_modifier & 0x3FF;
885 u64 in_param = vhcr->in_param;
886 int err = 0;
887 int i;
888
889 if (slave == dev->caps.function)
890 err = mlx4_cmd(dev, in_param, (in_modifier & 0x80000000) | eqn,
891 0, MLX4_CMD_MAP_EQ, MLX4_CMD_TIME_CLASS_B,
892 MLX4_CMD_NATIVE);
893 if (!err)
894 for (i = 0; i < MLX4_EVENT_TYPES_NUM; ++i)
895 if (in_param & (1LL << i))
896 event_eq[i].eqn = in_modifier >> 31 ? -1 : eqn;
897
898 return err;
899 }
900
mlx4_MAP_EQ(struct mlx4_dev * dev,u64 event_mask,int unmap,int eq_num)901 static int mlx4_MAP_EQ(struct mlx4_dev *dev, u64 event_mask, int unmap,
902 int eq_num)
903 {
904 return mlx4_cmd(dev, event_mask, (unmap << 31) | eq_num,
905 0, MLX4_CMD_MAP_EQ, MLX4_CMD_TIME_CLASS_B,
906 MLX4_CMD_WRAPPED);
907 }
908
mlx4_SW2HW_EQ(struct mlx4_dev * dev,struct mlx4_cmd_mailbox * mailbox,int eq_num)909 static int mlx4_SW2HW_EQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
910 int eq_num)
911 {
912 return mlx4_cmd(dev, mailbox->dma, eq_num, 0,
913 MLX4_CMD_SW2HW_EQ, MLX4_CMD_TIME_CLASS_A,
914 MLX4_CMD_WRAPPED);
915 }
916
mlx4_HW2SW_EQ(struct mlx4_dev * dev,int eq_num)917 static int mlx4_HW2SW_EQ(struct mlx4_dev *dev, int eq_num)
918 {
919 return mlx4_cmd(dev, 0, eq_num, 1, MLX4_CMD_HW2SW_EQ,
920 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
921 }
922
mlx4_num_eq_uar(struct mlx4_dev * dev)923 static int mlx4_num_eq_uar(struct mlx4_dev *dev)
924 {
925 /*
926 * Each UAR holds 4 EQ doorbells. To figure out how many UARs
927 * we need to map, take the difference of highest index and
928 * the lowest index we'll use and add 1.
929 */
930 return (dev->caps.num_comp_vectors + 1 + dev->caps.reserved_eqs) / 4 -
931 dev->caps.reserved_eqs / 4 + 1;
932 }
933
mlx4_get_eq_uar(struct mlx4_dev * dev,struct mlx4_eq * eq)934 static void __iomem *mlx4_get_eq_uar(struct mlx4_dev *dev, struct mlx4_eq *eq)
935 {
936 struct mlx4_priv *priv = mlx4_priv(dev);
937 int index;
938
939 index = eq->eqn / 4 - dev->caps.reserved_eqs / 4;
940
941 if (!priv->eq_table.uar_map[index]) {
942 priv->eq_table.uar_map[index] =
943 ioremap(
944 pci_resource_start(dev->persist->pdev, 2) +
945 ((eq->eqn / 4) << (dev->uar_page_shift)),
946 (1 << (dev->uar_page_shift)));
947 if (!priv->eq_table.uar_map[index]) {
948 mlx4_err(dev, "Couldn't map EQ doorbell for EQN 0x%06x\n",
949 eq->eqn);
950 return NULL;
951 }
952 }
953
954 return priv->eq_table.uar_map[index] + 0x800 + 8 * (eq->eqn % 4);
955 }
956
mlx4_unmap_uar(struct mlx4_dev * dev)957 static void mlx4_unmap_uar(struct mlx4_dev *dev)
958 {
959 struct mlx4_priv *priv = mlx4_priv(dev);
960 int i;
961
962 for (i = 0; i < mlx4_num_eq_uar(dev); ++i)
963 if (priv->eq_table.uar_map[i]) {
964 iounmap(priv->eq_table.uar_map[i]);
965 priv->eq_table.uar_map[i] = NULL;
966 }
967 }
968
mlx4_create_eq(struct mlx4_dev * dev,int nent,u8 intr,struct mlx4_eq * eq)969 static int mlx4_create_eq(struct mlx4_dev *dev, int nent,
970 u8 intr, struct mlx4_eq *eq)
971 {
972 struct mlx4_priv *priv = mlx4_priv(dev);
973 struct mlx4_cmd_mailbox *mailbox;
974 struct mlx4_eq_context *eq_context;
975 int npages;
976 u64 *dma_list = NULL;
977 dma_addr_t t;
978 u64 mtt_addr;
979 int err = -ENOMEM;
980 int i;
981
982 eq->dev = dev;
983 eq->nent = roundup_pow_of_two(max(nent, 2));
984 /* CX3 is capable of extending the CQE/EQE from 32 to 64 bytes, with
985 * strides of 64B,128B and 256B.
986 */
987 npages = PAGE_ALIGN(eq->nent * dev->caps.eqe_size) / PAGE_SIZE;
988
989 eq->page_list = kmalloc_array(npages, sizeof(*eq->page_list),
990 GFP_KERNEL);
991 if (!eq->page_list)
992 goto err_out;
993
994 for (i = 0; i < npages; ++i)
995 eq->page_list[i].buf = NULL;
996
997 dma_list = kmalloc_array(npages, sizeof(*dma_list), GFP_KERNEL);
998 if (!dma_list)
999 goto err_out_free;
1000
1001 mailbox = mlx4_alloc_cmd_mailbox(dev);
1002 if (IS_ERR(mailbox))
1003 goto err_out_free;
1004 eq_context = mailbox->buf;
1005
1006 for (i = 0; i < npages; ++i) {
1007 eq->page_list[i].buf = dma_alloc_coherent(&dev->persist->
1008 pdev->dev,
1009 PAGE_SIZE, &t,
1010 GFP_KERNEL);
1011 if (!eq->page_list[i].buf)
1012 goto err_out_free_pages;
1013
1014 dma_list[i] = t;
1015 eq->page_list[i].map = t;
1016 }
1017
1018 eq->eqn = mlx4_bitmap_alloc(&priv->eq_table.bitmap);
1019 if (eq->eqn == -1)
1020 goto err_out_free_pages;
1021
1022 eq->doorbell = mlx4_get_eq_uar(dev, eq);
1023 if (!eq->doorbell) {
1024 err = -ENOMEM;
1025 goto err_out_free_eq;
1026 }
1027
1028 err = mlx4_mtt_init(dev, npages, PAGE_SHIFT, &eq->mtt);
1029 if (err)
1030 goto err_out_free_eq;
1031
1032 err = mlx4_write_mtt(dev, &eq->mtt, 0, npages, dma_list);
1033 if (err)
1034 goto err_out_free_mtt;
1035
1036 eq_context->flags = cpu_to_be32(MLX4_EQ_STATUS_OK |
1037 MLX4_EQ_STATE_ARMED);
1038 eq_context->log_eq_size = ilog2(eq->nent);
1039 eq_context->intr = intr;
1040 eq_context->log_page_size = PAGE_SHIFT - MLX4_ICM_PAGE_SHIFT;
1041
1042 mtt_addr = mlx4_mtt_addr(dev, &eq->mtt);
1043 eq_context->mtt_base_addr_h = mtt_addr >> 32;
1044 eq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
1045
1046 err = mlx4_SW2HW_EQ(dev, mailbox, eq->eqn);
1047 if (err) {
1048 mlx4_warn(dev, "SW2HW_EQ failed (%d)\n", err);
1049 goto err_out_free_mtt;
1050 }
1051
1052 kfree(dma_list);
1053 mlx4_free_cmd_mailbox(dev, mailbox);
1054
1055 eq->cons_index = 0;
1056
1057 INIT_LIST_HEAD(&eq->tasklet_ctx.list);
1058 INIT_LIST_HEAD(&eq->tasklet_ctx.process_list);
1059 spin_lock_init(&eq->tasklet_ctx.lock);
1060 tasklet_setup(&eq->tasklet_ctx.task, mlx4_cq_tasklet_cb);
1061
1062 return err;
1063
1064 err_out_free_mtt:
1065 mlx4_mtt_cleanup(dev, &eq->mtt);
1066
1067 err_out_free_eq:
1068 mlx4_bitmap_free(&priv->eq_table.bitmap, eq->eqn, MLX4_USE_RR);
1069
1070 err_out_free_pages:
1071 for (i = 0; i < npages; ++i)
1072 if (eq->page_list[i].buf)
1073 dma_free_coherent(&dev->persist->pdev->dev, PAGE_SIZE,
1074 eq->page_list[i].buf,
1075 eq->page_list[i].map);
1076
1077 mlx4_free_cmd_mailbox(dev, mailbox);
1078
1079 err_out_free:
1080 kfree(eq->page_list);
1081 kfree(dma_list);
1082
1083 err_out:
1084 return err;
1085 }
1086
mlx4_free_eq(struct mlx4_dev * dev,struct mlx4_eq * eq)1087 static void mlx4_free_eq(struct mlx4_dev *dev,
1088 struct mlx4_eq *eq)
1089 {
1090 struct mlx4_priv *priv = mlx4_priv(dev);
1091 int err;
1092 int i;
1093 /* CX3 is capable of extending the CQE/EQE from 32 to 64 bytes, with
1094 * strides of 64B,128B and 256B
1095 */
1096 int npages = PAGE_ALIGN(dev->caps.eqe_size * eq->nent) / PAGE_SIZE;
1097
1098 err = mlx4_HW2SW_EQ(dev, eq->eqn);
1099 if (err)
1100 mlx4_warn(dev, "HW2SW_EQ failed (%d)\n", err);
1101
1102 synchronize_irq(eq->irq);
1103 tasklet_disable(&eq->tasklet_ctx.task);
1104
1105 mlx4_mtt_cleanup(dev, &eq->mtt);
1106 for (i = 0; i < npages; ++i)
1107 dma_free_coherent(&dev->persist->pdev->dev, PAGE_SIZE,
1108 eq->page_list[i].buf,
1109 eq->page_list[i].map);
1110
1111 kfree(eq->page_list);
1112 mlx4_bitmap_free(&priv->eq_table.bitmap, eq->eqn, MLX4_USE_RR);
1113 }
1114
mlx4_free_irqs(struct mlx4_dev * dev)1115 static void mlx4_free_irqs(struct mlx4_dev *dev)
1116 {
1117 struct mlx4_eq_table *eq_table = &mlx4_priv(dev)->eq_table;
1118 int i;
1119
1120 if (eq_table->have_irq)
1121 free_irq(dev->persist->pdev->irq, dev);
1122
1123 for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
1124 if (eq_table->eq[i].have_irq) {
1125 free_cpumask_var(eq_table->eq[i].affinity_mask);
1126 irq_update_affinity_hint(eq_table->eq[i].irq, NULL);
1127 free_irq(eq_table->eq[i].irq, eq_table->eq + i);
1128 eq_table->eq[i].have_irq = 0;
1129 }
1130
1131 kfree(eq_table->irq_names);
1132 }
1133
mlx4_map_clr_int(struct mlx4_dev * dev)1134 static int mlx4_map_clr_int(struct mlx4_dev *dev)
1135 {
1136 struct mlx4_priv *priv = mlx4_priv(dev);
1137
1138 priv->clr_base = ioremap(pci_resource_start(dev->persist->pdev,
1139 priv->fw.clr_int_bar) +
1140 priv->fw.clr_int_base, MLX4_CLR_INT_SIZE);
1141 if (!priv->clr_base) {
1142 mlx4_err(dev, "Couldn't map interrupt clear register, aborting\n");
1143 return -ENOMEM;
1144 }
1145
1146 return 0;
1147 }
1148
mlx4_unmap_clr_int(struct mlx4_dev * dev)1149 static void mlx4_unmap_clr_int(struct mlx4_dev *dev)
1150 {
1151 struct mlx4_priv *priv = mlx4_priv(dev);
1152
1153 iounmap(priv->clr_base);
1154 }
1155
mlx4_alloc_eq_table(struct mlx4_dev * dev)1156 int mlx4_alloc_eq_table(struct mlx4_dev *dev)
1157 {
1158 struct mlx4_priv *priv = mlx4_priv(dev);
1159
1160 priv->eq_table.eq = kcalloc(dev->caps.num_eqs - dev->caps.reserved_eqs,
1161 sizeof(*priv->eq_table.eq), GFP_KERNEL);
1162 if (!priv->eq_table.eq)
1163 return -ENOMEM;
1164
1165 return 0;
1166 }
1167
mlx4_free_eq_table(struct mlx4_dev * dev)1168 void mlx4_free_eq_table(struct mlx4_dev *dev)
1169 {
1170 kfree(mlx4_priv(dev)->eq_table.eq);
1171 }
1172
mlx4_init_eq_table(struct mlx4_dev * dev)1173 int mlx4_init_eq_table(struct mlx4_dev *dev)
1174 {
1175 struct mlx4_priv *priv = mlx4_priv(dev);
1176 int err;
1177 int i;
1178
1179 priv->eq_table.uar_map = kcalloc(mlx4_num_eq_uar(dev),
1180 sizeof(*priv->eq_table.uar_map),
1181 GFP_KERNEL);
1182 if (!priv->eq_table.uar_map) {
1183 err = -ENOMEM;
1184 goto err_out_free;
1185 }
1186
1187 err = mlx4_bitmap_init(&priv->eq_table.bitmap,
1188 roundup_pow_of_two(dev->caps.num_eqs),
1189 dev->caps.num_eqs - 1,
1190 dev->caps.reserved_eqs,
1191 roundup_pow_of_two(dev->caps.num_eqs) -
1192 dev->caps.num_eqs);
1193 if (err)
1194 goto err_out_free;
1195
1196 for (i = 0; i < mlx4_num_eq_uar(dev); ++i)
1197 priv->eq_table.uar_map[i] = NULL;
1198
1199 if (!mlx4_is_slave(dev)) {
1200 err = mlx4_map_clr_int(dev);
1201 if (err)
1202 goto err_out_bitmap;
1203
1204 priv->eq_table.clr_mask =
1205 swab32(1 << (priv->eq_table.inta_pin & 31));
1206 priv->eq_table.clr_int = priv->clr_base +
1207 (priv->eq_table.inta_pin < 32 ? 4 : 0);
1208 }
1209
1210 priv->eq_table.irq_names =
1211 kmalloc_array(MLX4_IRQNAME_SIZE,
1212 (dev->caps.num_comp_vectors + 1),
1213 GFP_KERNEL);
1214 if (!priv->eq_table.irq_names) {
1215 err = -ENOMEM;
1216 goto err_out_clr_int;
1217 }
1218
1219 for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i) {
1220 if (i == MLX4_EQ_ASYNC) {
1221 err = mlx4_create_eq(dev,
1222 MLX4_NUM_ASYNC_EQE + MLX4_NUM_SPARE_EQE,
1223 0, &priv->eq_table.eq[MLX4_EQ_ASYNC]);
1224 } else {
1225 struct mlx4_eq *eq = &priv->eq_table.eq[i];
1226 #ifdef CONFIG_RFS_ACCEL
1227 int port = find_first_bit(eq->actv_ports.ports,
1228 dev->caps.num_ports) + 1;
1229
1230 if (port <= dev->caps.num_ports) {
1231 struct mlx4_port_info *info =
1232 &mlx4_priv(dev)->port[port];
1233
1234 if (!info->rmap) {
1235 info->rmap = alloc_irq_cpu_rmap(
1236 mlx4_get_eqs_per_port(dev, port));
1237 if (!info->rmap) {
1238 mlx4_warn(dev, "Failed to allocate cpu rmap\n");
1239 err = -ENOMEM;
1240 goto err_out_unmap;
1241 }
1242 }
1243
1244 err = irq_cpu_rmap_add(
1245 info->rmap, eq->irq);
1246 if (err)
1247 mlx4_warn(dev, "Failed adding irq rmap\n");
1248 }
1249 #endif
1250 err = mlx4_create_eq(dev, dev->quotas.cq +
1251 MLX4_NUM_SPARE_EQE,
1252 (dev->flags & MLX4_FLAG_MSI_X) ?
1253 i + 1 - !!(i > MLX4_EQ_ASYNC) : 0,
1254 eq);
1255 }
1256 if (err)
1257 goto err_out_unmap;
1258 }
1259
1260 if (dev->flags & MLX4_FLAG_MSI_X) {
1261 const char *eq_name;
1262
1263 snprintf(priv->eq_table.irq_names +
1264 MLX4_EQ_ASYNC * MLX4_IRQNAME_SIZE,
1265 MLX4_IRQNAME_SIZE,
1266 "mlx4-async@pci:%s",
1267 pci_name(dev->persist->pdev));
1268 eq_name = priv->eq_table.irq_names +
1269 MLX4_EQ_ASYNC * MLX4_IRQNAME_SIZE;
1270
1271 err = request_irq(priv->eq_table.eq[MLX4_EQ_ASYNC].irq,
1272 mlx4_msi_x_interrupt, 0, eq_name,
1273 priv->eq_table.eq + MLX4_EQ_ASYNC);
1274 if (err)
1275 goto err_out_unmap;
1276
1277 priv->eq_table.eq[MLX4_EQ_ASYNC].have_irq = 1;
1278 } else {
1279 snprintf(priv->eq_table.irq_names,
1280 MLX4_IRQNAME_SIZE,
1281 DRV_NAME "@pci:%s",
1282 pci_name(dev->persist->pdev));
1283 err = request_irq(dev->persist->pdev->irq, mlx4_interrupt,
1284 IRQF_SHARED, priv->eq_table.irq_names, dev);
1285 if (err)
1286 goto err_out_unmap;
1287
1288 priv->eq_table.have_irq = 1;
1289 }
1290
1291 err = mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0,
1292 priv->eq_table.eq[MLX4_EQ_ASYNC].eqn);
1293 if (err)
1294 mlx4_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n",
1295 priv->eq_table.eq[MLX4_EQ_ASYNC].eqn, err);
1296
1297 /* arm ASYNC eq */
1298 eq_set_ci(&priv->eq_table.eq[MLX4_EQ_ASYNC], 1);
1299
1300 return 0;
1301
1302 err_out_unmap:
1303 while (i > 0)
1304 mlx4_free_eq(dev, &priv->eq_table.eq[--i]);
1305 #ifdef CONFIG_RFS_ACCEL
1306 for (i = 1; i <= dev->caps.num_ports; i++) {
1307 if (mlx4_priv(dev)->port[i].rmap) {
1308 free_irq_cpu_rmap(mlx4_priv(dev)->port[i].rmap);
1309 mlx4_priv(dev)->port[i].rmap = NULL;
1310 }
1311 }
1312 #endif
1313 mlx4_free_irqs(dev);
1314
1315 err_out_clr_int:
1316 if (!mlx4_is_slave(dev))
1317 mlx4_unmap_clr_int(dev);
1318
1319 err_out_bitmap:
1320 mlx4_unmap_uar(dev);
1321 mlx4_bitmap_cleanup(&priv->eq_table.bitmap);
1322
1323 err_out_free:
1324 kfree(priv->eq_table.uar_map);
1325
1326 return err;
1327 }
1328
mlx4_cleanup_eq_table(struct mlx4_dev * dev)1329 void mlx4_cleanup_eq_table(struct mlx4_dev *dev)
1330 {
1331 struct mlx4_priv *priv = mlx4_priv(dev);
1332 int i;
1333
1334 mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 1,
1335 priv->eq_table.eq[MLX4_EQ_ASYNC].eqn);
1336
1337 #ifdef CONFIG_RFS_ACCEL
1338 for (i = 1; i <= dev->caps.num_ports; i++) {
1339 if (mlx4_priv(dev)->port[i].rmap) {
1340 free_irq_cpu_rmap(mlx4_priv(dev)->port[i].rmap);
1341 mlx4_priv(dev)->port[i].rmap = NULL;
1342 }
1343 }
1344 #endif
1345 mlx4_free_irqs(dev);
1346
1347 for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
1348 mlx4_free_eq(dev, &priv->eq_table.eq[i]);
1349
1350 if (!mlx4_is_slave(dev))
1351 mlx4_unmap_clr_int(dev);
1352
1353 mlx4_unmap_uar(dev);
1354 mlx4_bitmap_cleanup(&priv->eq_table.bitmap);
1355
1356 kfree(priv->eq_table.uar_map);
1357 }
1358
1359 /* A test that verifies that we can accept interrupts
1360 * on the vector allocated for asynchronous events
1361 */
mlx4_test_async(struct mlx4_dev * dev)1362 int mlx4_test_async(struct mlx4_dev *dev)
1363 {
1364 return mlx4_NOP(dev);
1365 }
1366 EXPORT_SYMBOL(mlx4_test_async);
1367
1368 /* A test that verifies that we can accept interrupts
1369 * on the given irq vector of the tested port.
1370 * Interrupts are checked using the NOP command.
1371 */
mlx4_test_interrupt(struct mlx4_dev * dev,int vector)1372 int mlx4_test_interrupt(struct mlx4_dev *dev, int vector)
1373 {
1374 struct mlx4_priv *priv = mlx4_priv(dev);
1375 int err;
1376
1377 /* Temporary use polling for command completions */
1378 mlx4_cmd_use_polling(dev);
1379
1380 /* Map the new eq to handle all asynchronous events */
1381 err = mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0,
1382 priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(vector)].eqn);
1383 if (err) {
1384 mlx4_warn(dev, "Failed mapping eq for interrupt test\n");
1385 goto out;
1386 }
1387
1388 /* Go back to using events */
1389 mlx4_cmd_use_events(dev);
1390 err = mlx4_NOP(dev);
1391
1392 /* Return to default */
1393 mlx4_cmd_use_polling(dev);
1394 out:
1395 mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0,
1396 priv->eq_table.eq[MLX4_EQ_ASYNC].eqn);
1397 mlx4_cmd_use_events(dev);
1398
1399 return err;
1400 }
1401 EXPORT_SYMBOL(mlx4_test_interrupt);
1402
mlx4_is_eq_vector_valid(struct mlx4_dev * dev,u8 port,int vector)1403 bool mlx4_is_eq_vector_valid(struct mlx4_dev *dev, u8 port, int vector)
1404 {
1405 struct mlx4_priv *priv = mlx4_priv(dev);
1406
1407 vector = MLX4_CQ_TO_EQ_VECTOR(vector);
1408 if (vector < 0 || (vector >= dev->caps.num_comp_vectors + 1) ||
1409 (vector == MLX4_EQ_ASYNC))
1410 return false;
1411
1412 return test_bit(port - 1, priv->eq_table.eq[vector].actv_ports.ports);
1413 }
1414 EXPORT_SYMBOL(mlx4_is_eq_vector_valid);
1415
mlx4_get_eqs_per_port(struct mlx4_dev * dev,u8 port)1416 u32 mlx4_get_eqs_per_port(struct mlx4_dev *dev, u8 port)
1417 {
1418 struct mlx4_priv *priv = mlx4_priv(dev);
1419 unsigned int i;
1420 unsigned int sum = 0;
1421
1422 for (i = 0; i < dev->caps.num_comp_vectors + 1; i++)
1423 sum += !!test_bit(port - 1,
1424 priv->eq_table.eq[i].actv_ports.ports);
1425
1426 return sum;
1427 }
1428 EXPORT_SYMBOL(mlx4_get_eqs_per_port);
1429
mlx4_is_eq_shared(struct mlx4_dev * dev,int vector)1430 int mlx4_is_eq_shared(struct mlx4_dev *dev, int vector)
1431 {
1432 struct mlx4_priv *priv = mlx4_priv(dev);
1433
1434 vector = MLX4_CQ_TO_EQ_VECTOR(vector);
1435 if (vector <= 0 || (vector >= dev->caps.num_comp_vectors + 1))
1436 return -EINVAL;
1437
1438 return !!(bitmap_weight(priv->eq_table.eq[vector].actv_ports.ports,
1439 dev->caps.num_ports) > 1);
1440 }
1441 EXPORT_SYMBOL(mlx4_is_eq_shared);
1442
mlx4_get_cpu_rmap(struct mlx4_dev * dev,int port)1443 struct cpu_rmap *mlx4_get_cpu_rmap(struct mlx4_dev *dev, int port)
1444 {
1445 return mlx4_priv(dev)->port[port].rmap;
1446 }
1447 EXPORT_SYMBOL(mlx4_get_cpu_rmap);
1448
mlx4_assign_eq(struct mlx4_dev * dev,u8 port,int * vector)1449 int mlx4_assign_eq(struct mlx4_dev *dev, u8 port, int *vector)
1450 {
1451 struct mlx4_priv *priv = mlx4_priv(dev);
1452 int err = 0, i = 0;
1453 u32 min_ref_count_val = (u32)-1;
1454 int requested_vector = MLX4_CQ_TO_EQ_VECTOR(*vector);
1455 int *prequested_vector = NULL;
1456
1457
1458 mutex_lock(&priv->msix_ctl.pool_lock);
1459 if (requested_vector < (dev->caps.num_comp_vectors + 1) &&
1460 (requested_vector >= 0) &&
1461 (requested_vector != MLX4_EQ_ASYNC)) {
1462 if (test_bit(port - 1,
1463 priv->eq_table.eq[requested_vector].actv_ports.ports)) {
1464 prequested_vector = &requested_vector;
1465 } else {
1466 struct mlx4_eq *eq;
1467
1468 for (i = 1; i < port;
1469 requested_vector += mlx4_get_eqs_per_port(dev, i++))
1470 ;
1471
1472 eq = &priv->eq_table.eq[requested_vector];
1473 if (requested_vector < dev->caps.num_comp_vectors + 1 &&
1474 test_bit(port - 1, eq->actv_ports.ports)) {
1475 prequested_vector = &requested_vector;
1476 }
1477 }
1478 }
1479
1480 if (!prequested_vector) {
1481 requested_vector = -1;
1482 for (i = 0; min_ref_count_val && i < dev->caps.num_comp_vectors + 1;
1483 i++) {
1484 struct mlx4_eq *eq = &priv->eq_table.eq[i];
1485
1486 if (min_ref_count_val > eq->ref_count &&
1487 test_bit(port - 1, eq->actv_ports.ports)) {
1488 min_ref_count_val = eq->ref_count;
1489 requested_vector = i;
1490 }
1491 }
1492
1493 if (requested_vector < 0) {
1494 err = -ENOSPC;
1495 goto err_unlock;
1496 }
1497
1498 prequested_vector = &requested_vector;
1499 }
1500
1501 if (!test_bit(*prequested_vector, priv->msix_ctl.pool_bm) &&
1502 dev->flags & MLX4_FLAG_MSI_X) {
1503 set_bit(*prequested_vector, priv->msix_ctl.pool_bm);
1504 snprintf(priv->eq_table.irq_names +
1505 *prequested_vector * MLX4_IRQNAME_SIZE,
1506 MLX4_IRQNAME_SIZE, "mlx4-%d@%s",
1507 *prequested_vector, dev_name(&dev->persist->pdev->dev));
1508
1509 err = request_irq(priv->eq_table.eq[*prequested_vector].irq,
1510 mlx4_msi_x_interrupt, 0,
1511 &priv->eq_table.irq_names[*prequested_vector << 5],
1512 priv->eq_table.eq + *prequested_vector);
1513
1514 if (err) {
1515 clear_bit(*prequested_vector, priv->msix_ctl.pool_bm);
1516 *prequested_vector = -1;
1517 } else {
1518 #if defined(CONFIG_SMP)
1519 mlx4_set_eq_affinity_hint(priv, *prequested_vector);
1520 #endif
1521 eq_set_ci(&priv->eq_table.eq[*prequested_vector], 1);
1522 priv->eq_table.eq[*prequested_vector].have_irq = 1;
1523 }
1524 }
1525
1526 if (!err && *prequested_vector >= 0)
1527 priv->eq_table.eq[*prequested_vector].ref_count++;
1528
1529 err_unlock:
1530 mutex_unlock(&priv->msix_ctl.pool_lock);
1531
1532 if (!err && *prequested_vector >= 0)
1533 *vector = MLX4_EQ_TO_CQ_VECTOR(*prequested_vector);
1534 else
1535 *vector = 0;
1536
1537 return err;
1538 }
1539 EXPORT_SYMBOL(mlx4_assign_eq);
1540
mlx4_eq_get_irq(struct mlx4_dev * dev,int cq_vec)1541 int mlx4_eq_get_irq(struct mlx4_dev *dev, int cq_vec)
1542 {
1543 struct mlx4_priv *priv = mlx4_priv(dev);
1544
1545 return priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(cq_vec)].irq;
1546 }
1547 EXPORT_SYMBOL(mlx4_eq_get_irq);
1548
mlx4_release_eq(struct mlx4_dev * dev,int vec)1549 void mlx4_release_eq(struct mlx4_dev *dev, int vec)
1550 {
1551 struct mlx4_priv *priv = mlx4_priv(dev);
1552 int eq_vec = MLX4_CQ_TO_EQ_VECTOR(vec);
1553
1554 mutex_lock(&priv->msix_ctl.pool_lock);
1555 priv->eq_table.eq[eq_vec].ref_count--;
1556
1557 /* once we allocated EQ, we don't release it because it might be binded
1558 * to cpu_rmap.
1559 */
1560 mutex_unlock(&priv->msix_ctl.pool_lock);
1561 }
1562 EXPORT_SYMBOL(mlx4_release_eq);
1563
1564