1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/* Copyright (c) 2015-2018 Mellanox Technologies. All rights reserved */
3
4#include <linux/kernel.h>
5#include <linux/module.h>
6#include <linux/device.h>
7#include <linux/export.h>
8#include <linux/err.h>
9#include <linux/if_link.h>
10#include <linux/netdevice.h>
11#include <linux/completion.h>
12#include <linux/skbuff.h>
13#include <linux/etherdevice.h>
14#include <linux/types.h>
15#include <linux/string.h>
16#include <linux/gfp.h>
17#include <linux/random.h>
18#include <linux/jiffies.h>
19#include <linux/mutex.h>
20#include <linux/rcupdate.h>
21#include <linux/slab.h>
22#include <linux/workqueue.h>
23#include <asm/byteorder.h>
24#include <net/devlink.h>
25#include <trace/events/devlink.h>
26
27#include "core.h"
28#include "item.h"
29#include "cmd.h"
30#include "port.h"
31#include "trap.h"
32#include "emad.h"
33#include "reg.h"
34#include "resources.h"
35
36static LIST_HEAD(mlxsw_core_driver_list);
37static DEFINE_SPINLOCK(mlxsw_core_driver_list_lock);
38
39static const char mlxsw_core_driver_name[] = "mlxsw_core";
40
41static struct workqueue_struct *mlxsw_wq;
42static struct workqueue_struct *mlxsw_owq;
43
44struct mlxsw_core_port {
45 struct devlink_port devlink_port;
46 void *port_driver_priv;
47 u8 local_port;
48};
49
50void *mlxsw_core_port_driver_priv(struct mlxsw_core_port *mlxsw_core_port)
51{
52 return mlxsw_core_port->port_driver_priv;
53}
54EXPORT_SYMBOL(mlxsw_core_port_driver_priv);
55
56static bool mlxsw_core_port_check(struct mlxsw_core_port *mlxsw_core_port)
57{
58 return mlxsw_core_port->port_driver_priv != NULL;
59}
60
61struct mlxsw_core {
62 struct mlxsw_driver *driver;
63 const struct mlxsw_bus *bus;
64 void *bus_priv;
65 const struct mlxsw_bus_info *bus_info;
66 struct workqueue_struct *emad_wq;
67 struct list_head rx_listener_list;
68 struct list_head event_listener_list;
69 struct {
70 atomic64_t tid;
71 struct list_head trans_list;
72 spinlock_t trans_list_lock; /* protects trans_list writes */
73 bool use_emad;
74 } emad;
75 struct {
76 u8 *mapping; /* lag_id+port_index to local_port mapping */
77 } lag;
78 struct mlxsw_res res;
79 struct mlxsw_hwmon *hwmon;
80 struct mlxsw_thermal *thermal;
81 struct mlxsw_core_port *ports;
82 unsigned int max_ports;
83 bool reload_fail;
84 bool fw_flash_in_progress;
85 unsigned long driver_priv[0];
86 /* driver_priv has to be always the last item */
87};
88
89#define MLXSW_PORT_MAX_PORTS_DEFAULT 0x40
90
91static int mlxsw_ports_init(struct mlxsw_core *mlxsw_core)
92{
93 /* Switch ports are numbered from 1 to queried value */
94 if (MLXSW_CORE_RES_VALID(mlxsw_core, MAX_SYSTEM_PORT))
95 mlxsw_core->max_ports = MLXSW_CORE_RES_GET(mlxsw_core,
96 MAX_SYSTEM_PORT) + 1;
97 else
98 mlxsw_core->max_ports = MLXSW_PORT_MAX_PORTS_DEFAULT + 1;
99
100 mlxsw_core->ports = kcalloc(mlxsw_core->max_ports,
101 sizeof(struct mlxsw_core_port), GFP_KERNEL);
102 if (!mlxsw_core->ports)
103 return -ENOMEM;
104
105 return 0;
106}
107
108static void mlxsw_ports_fini(struct mlxsw_core *mlxsw_core)
109{
110 kfree(mlxsw_core->ports);
111}
112
113unsigned int mlxsw_core_max_ports(const struct mlxsw_core *mlxsw_core)
114{
115 return mlxsw_core->max_ports;
116}
117EXPORT_SYMBOL(mlxsw_core_max_ports);
118
119void *mlxsw_core_driver_priv(struct mlxsw_core *mlxsw_core)
120{
121 return mlxsw_core->driver_priv;
122}
123EXPORT_SYMBOL(mlxsw_core_driver_priv);
124
125struct mlxsw_rx_listener_item {
126 struct list_head list;
127 struct mlxsw_rx_listener rxl;
128 void *priv;
129};
130
131struct mlxsw_event_listener_item {
132 struct list_head list;
133 struct mlxsw_event_listener el;
134 void *priv;
135};
136
137/******************
138 * EMAD processing
139 ******************/
140
141/* emad_eth_hdr_dmac
142 * Destination MAC in EMAD's Ethernet header.
143 * Must be set to 01:02:c9:00:00:01
144 */
145MLXSW_ITEM_BUF(emad, eth_hdr, dmac, 0x00, 6);
146
147/* emad_eth_hdr_smac
148 * Source MAC in EMAD's Ethernet header.
149 * Must be set to 00:02:c9:01:02:03
150 */
151MLXSW_ITEM_BUF(emad, eth_hdr, smac, 0x06, 6);
152
153/* emad_eth_hdr_ethertype
154 * Ethertype in EMAD's Ethernet header.
155 * Must be set to 0x8932
156 */
157MLXSW_ITEM32(emad, eth_hdr, ethertype, 0x0C, 16, 16);
158
159/* emad_eth_hdr_mlx_proto
160 * Mellanox protocol.
161 * Must be set to 0x0.
162 */
163MLXSW_ITEM32(emad, eth_hdr, mlx_proto, 0x0C, 8, 8);
164
165/* emad_eth_hdr_ver
166 * Mellanox protocol version.
167 * Must be set to 0x0.
168 */
169MLXSW_ITEM32(emad, eth_hdr, ver, 0x0C, 4, 4);
170
171/* emad_op_tlv_type
172 * Type of the TLV.
173 * Must be set to 0x1 (operation TLV).
174 */
175MLXSW_ITEM32(emad, op_tlv, type, 0x00, 27, 5);
176
177/* emad_op_tlv_len
178 * Length of the operation TLV in u32.
179 * Must be set to 0x4.
180 */
181MLXSW_ITEM32(emad, op_tlv, len, 0x00, 16, 11);
182
183/* emad_op_tlv_dr
184 * Direct route bit. Setting to 1 indicates the EMAD is a direct route
185 * EMAD. DR TLV must follow.
186 *
187 * Note: Currently not supported and must not be set.
188 */
189MLXSW_ITEM32(emad, op_tlv, dr, 0x00, 15, 1);
190
191/* emad_op_tlv_status
192 * Returned status in case of EMAD response. Must be set to 0 in case
193 * of EMAD request.
194 * 0x0 - success
195 * 0x1 - device is busy. Requester should retry
196 * 0x2 - Mellanox protocol version not supported
197 * 0x3 - unknown TLV
198 * 0x4 - register not supported
199 * 0x5 - operation class not supported
200 * 0x6 - EMAD method not supported
201 * 0x7 - bad parameter (e.g. port out of range)
202 * 0x8 - resource not available
203 * 0x9 - message receipt acknowledgment. Requester should retry
204 * 0x70 - internal error
205 */
206MLXSW_ITEM32(emad, op_tlv, status, 0x00, 8, 7);
207
208/* emad_op_tlv_register_id
209 * Register ID of register within register TLV.
210 */
211MLXSW_ITEM32(emad, op_tlv, register_id, 0x04, 16, 16);
212
213/* emad_op_tlv_r
214 * Response bit. Setting to 1 indicates Response, otherwise request.
215 */
216MLXSW_ITEM32(emad, op_tlv, r, 0x04, 15, 1);
217
218/* emad_op_tlv_method
219 * EMAD method type.
220 * 0x1 - query
221 * 0x2 - write
222 * 0x3 - send (currently not supported)
223 * 0x4 - event
224 */
225MLXSW_ITEM32(emad, op_tlv, method, 0x04, 8, 7);
226
227/* emad_op_tlv_class
228 * EMAD operation class. Must be set to 0x1 (REG_ACCESS).
229 */
230MLXSW_ITEM32(emad, op_tlv, class, 0x04, 0, 8);
231
232/* emad_op_tlv_tid
233 * EMAD transaction ID. Used for pairing request and response EMADs.
234 */
235MLXSW_ITEM64(emad, op_tlv, tid, 0x08, 0, 64);
236
237/* emad_reg_tlv_type
238 * Type of the TLV.
239 * Must be set to 0x3 (register TLV).
240 */
241MLXSW_ITEM32(emad, reg_tlv, type, 0x00, 27, 5);
242
243/* emad_reg_tlv_len
244 * Length of the operation TLV in u32.
245 */
246MLXSW_ITEM32(emad, reg_tlv, len, 0x00, 16, 11);
247
248/* emad_end_tlv_type
249 * Type of the TLV.
250 * Must be set to 0x0 (end TLV).
251 */
252MLXSW_ITEM32(emad, end_tlv, type, 0x00, 27, 5);
253
254/* emad_end_tlv_len
255 * Length of the end TLV in u32.
256 * Must be set to 1.
257 */
258MLXSW_ITEM32(emad, end_tlv, len, 0x00, 16, 11);
259
260enum mlxsw_core_reg_access_type {
261 MLXSW_CORE_REG_ACCESS_TYPE_QUERY,
262 MLXSW_CORE_REG_ACCESS_TYPE_WRITE,
263};
264
265static inline const char *
266mlxsw_core_reg_access_type_str(enum mlxsw_core_reg_access_type type)
267{
268 switch (type) {
269 case MLXSW_CORE_REG_ACCESS_TYPE_QUERY:
270 return "query";
271 case MLXSW_CORE_REG_ACCESS_TYPE_WRITE:
272 return "write";
273 }
274 BUG();
275}
276
277static void mlxsw_emad_pack_end_tlv(char *end_tlv)
278{
279 mlxsw_emad_end_tlv_type_set(end_tlv, MLXSW_EMAD_TLV_TYPE_END);
280 mlxsw_emad_end_tlv_len_set(end_tlv, MLXSW_EMAD_END_TLV_LEN);
281}
282
283static void mlxsw_emad_pack_reg_tlv(char *reg_tlv,
284 const struct mlxsw_reg_info *reg,
285 char *payload)
286{
287 mlxsw_emad_reg_tlv_type_set(reg_tlv, MLXSW_EMAD_TLV_TYPE_REG);
288 mlxsw_emad_reg_tlv_len_set(reg_tlv, reg->len / sizeof(u32) + 1);
289 memcpy(reg_tlv + sizeof(u32), payload, reg->len);
290}
291
292static void mlxsw_emad_pack_op_tlv(char *op_tlv,
293 const struct mlxsw_reg_info *reg,
294 enum mlxsw_core_reg_access_type type,
295 u64 tid)
296{
297 mlxsw_emad_op_tlv_type_set(op_tlv, MLXSW_EMAD_TLV_TYPE_OP);
298 mlxsw_emad_op_tlv_len_set(op_tlv, MLXSW_EMAD_OP_TLV_LEN);
299 mlxsw_emad_op_tlv_dr_set(op_tlv, 0);
300 mlxsw_emad_op_tlv_status_set(op_tlv, 0);
301 mlxsw_emad_op_tlv_register_id_set(op_tlv, reg->id);
302 mlxsw_emad_op_tlv_r_set(op_tlv, MLXSW_EMAD_OP_TLV_REQUEST);
303 if (type == MLXSW_CORE_REG_ACCESS_TYPE_QUERY)
304 mlxsw_emad_op_tlv_method_set(op_tlv,
305 MLXSW_EMAD_OP_TLV_METHOD_QUERY);
306 else
307 mlxsw_emad_op_tlv_method_set(op_tlv,
308 MLXSW_EMAD_OP_TLV_METHOD_WRITE);
309 mlxsw_emad_op_tlv_class_set(op_tlv,
310 MLXSW_EMAD_OP_TLV_CLASS_REG_ACCESS);
311 mlxsw_emad_op_tlv_tid_set(op_tlv, tid);
312}
313
314static int mlxsw_emad_construct_eth_hdr(struct sk_buff *skb)
315{
316 char *eth_hdr = skb_push(skb, MLXSW_EMAD_ETH_HDR_LEN);
317
318 mlxsw_emad_eth_hdr_dmac_memcpy_to(eth_hdr, MLXSW_EMAD_EH_DMAC);
319 mlxsw_emad_eth_hdr_smac_memcpy_to(eth_hdr, MLXSW_EMAD_EH_SMAC);
320 mlxsw_emad_eth_hdr_ethertype_set(eth_hdr, MLXSW_EMAD_EH_ETHERTYPE);
321 mlxsw_emad_eth_hdr_mlx_proto_set(eth_hdr, MLXSW_EMAD_EH_MLX_PROTO);
322 mlxsw_emad_eth_hdr_ver_set(eth_hdr, MLXSW_EMAD_EH_PROTO_VERSION);
323
324 skb_reset_mac_header(skb);
325
326 return 0;
327}
328
329static void mlxsw_emad_construct(struct sk_buff *skb,
330 const struct mlxsw_reg_info *reg,
331 char *payload,
332 enum mlxsw_core_reg_access_type type,
333 u64 tid)
334{
335 char *buf;
336
337 buf = skb_push(skb, MLXSW_EMAD_END_TLV_LEN * sizeof(u32));
338 mlxsw_emad_pack_end_tlv(buf);
339
340 buf = skb_push(skb, reg->len + sizeof(u32));
341 mlxsw_emad_pack_reg_tlv(buf, reg, payload);
342
343 buf = skb_push(skb, MLXSW_EMAD_OP_TLV_LEN * sizeof(u32));
344 mlxsw_emad_pack_op_tlv(buf, reg, type, tid);
345
346 mlxsw_emad_construct_eth_hdr(skb);
347}
348
349static char *mlxsw_emad_op_tlv(const struct sk_buff *skb)
350{
351 return ((char *) (skb->data + MLXSW_EMAD_ETH_HDR_LEN));
352}
353
354static char *mlxsw_emad_reg_tlv(const struct sk_buff *skb)
355{
356 return ((char *) (skb->data + MLXSW_EMAD_ETH_HDR_LEN +
357 MLXSW_EMAD_OP_TLV_LEN * sizeof(u32)));
358}
359
360static char *mlxsw_emad_reg_payload(const char *op_tlv)
361{
362 return ((char *) (op_tlv + (MLXSW_EMAD_OP_TLV_LEN + 1) * sizeof(u32)));
363}
364
365static u64 mlxsw_emad_get_tid(const struct sk_buff *skb)
366{
367 char *op_tlv;
368
369 op_tlv = mlxsw_emad_op_tlv(skb);
370 return mlxsw_emad_op_tlv_tid_get(op_tlv);
371}
372
373static bool mlxsw_emad_is_resp(const struct sk_buff *skb)
374{
375 char *op_tlv;
376
377 op_tlv = mlxsw_emad_op_tlv(skb);
378 return (mlxsw_emad_op_tlv_r_get(op_tlv) == MLXSW_EMAD_OP_TLV_RESPONSE);
379}
380
381static int mlxsw_emad_process_status(char *op_tlv,
382 enum mlxsw_emad_op_tlv_status *p_status)
383{
384 *p_status = mlxsw_emad_op_tlv_status_get(op_tlv);
385
386 switch (*p_status) {
387 case MLXSW_EMAD_OP_TLV_STATUS_SUCCESS:
388 return 0;
389 case MLXSW_EMAD_OP_TLV_STATUS_BUSY:
390 case MLXSW_EMAD_OP_TLV_STATUS_MESSAGE_RECEIPT_ACK:
391 return -EAGAIN;
392 case MLXSW_EMAD_OP_TLV_STATUS_VERSION_NOT_SUPPORTED:
393 case MLXSW_EMAD_OP_TLV_STATUS_UNKNOWN_TLV:
394 case MLXSW_EMAD_OP_TLV_STATUS_REGISTER_NOT_SUPPORTED:
395 case MLXSW_EMAD_OP_TLV_STATUS_CLASS_NOT_SUPPORTED:
396 case MLXSW_EMAD_OP_TLV_STATUS_METHOD_NOT_SUPPORTED:
397 case MLXSW_EMAD_OP_TLV_STATUS_BAD_PARAMETER:
398 case MLXSW_EMAD_OP_TLV_STATUS_RESOURCE_NOT_AVAILABLE:
399 case MLXSW_EMAD_OP_TLV_STATUS_INTERNAL_ERROR:
400 default:
401 return -EIO;
402 }
403}
404
405static int
406mlxsw_emad_process_status_skb(struct sk_buff *skb,
407 enum mlxsw_emad_op_tlv_status *p_status)
408{
409 return mlxsw_emad_process_status(mlxsw_emad_op_tlv(skb), p_status);
410}
411
412struct mlxsw_reg_trans {
413 struct list_head list;
414 struct list_head bulk_list;
415 struct mlxsw_core *core;
416 struct sk_buff *tx_skb;
417 struct mlxsw_tx_info tx_info;
418 struct delayed_work timeout_dw;
419 unsigned int retries;
420 u64 tid;
421 struct completion completion;
422 atomic_t active;
423 mlxsw_reg_trans_cb_t *cb;
424 unsigned long cb_priv;
425 const struct mlxsw_reg_info *reg;
426 enum mlxsw_core_reg_access_type type;
427 int err;
428 enum mlxsw_emad_op_tlv_status emad_status;
429 struct rcu_head rcu;
430};
431
432#define MLXSW_EMAD_TIMEOUT_DURING_FW_FLASH_MS 3000
433#define MLXSW_EMAD_TIMEOUT_MS 200
434
435static void mlxsw_emad_trans_timeout_schedule(struct mlxsw_reg_trans *trans)
436{
437 unsigned long timeout = msecs_to_jiffies(MLXSW_EMAD_TIMEOUT_MS);
438
439 if (trans->core->fw_flash_in_progress)
440 timeout = msecs_to_jiffies(MLXSW_EMAD_TIMEOUT_DURING_FW_FLASH_MS);
441
442 queue_delayed_work(trans->core->emad_wq, &trans->timeout_dw, timeout);
443}
444
445static int mlxsw_emad_transmit(struct mlxsw_core *mlxsw_core,
446 struct mlxsw_reg_trans *trans)
447{
448 struct sk_buff *skb;
449 int err;
450
451 skb = skb_copy(trans->tx_skb, GFP_KERNEL);
452 if (!skb)
453 return -ENOMEM;
454
455 trace_devlink_hwmsg(priv_to_devlink(mlxsw_core), false, 0,
456 skb->data + mlxsw_core->driver->txhdr_len,
457 skb->len - mlxsw_core->driver->txhdr_len);
458
459 atomic_set(&trans->active, 1);
460 err = mlxsw_core_skb_transmit(mlxsw_core, skb, &trans->tx_info);
461 if (err) {
462 dev_kfree_skb(skb);
463 return err;
464 }
465 mlxsw_emad_trans_timeout_schedule(trans);
466 return 0;
467}
468
469static void mlxsw_emad_trans_finish(struct mlxsw_reg_trans *trans, int err)
470{
471 struct mlxsw_core *mlxsw_core = trans->core;
472
473 dev_kfree_skb(trans->tx_skb);
474 spin_lock_bh(&mlxsw_core->emad.trans_list_lock);
475 list_del_rcu(&trans->list);
476 spin_unlock_bh(&mlxsw_core->emad.trans_list_lock);
477 trans->err = err;
478 complete(&trans->completion);
479}
480
481static void mlxsw_emad_transmit_retry(struct mlxsw_core *mlxsw_core,
482 struct mlxsw_reg_trans *trans)
483{
484 int err;
485
486 if (trans->retries < MLXSW_EMAD_MAX_RETRY) {
487 trans->retries++;
488 err = mlxsw_emad_transmit(trans->core, trans);
489 if (err == 0)
490 return;
491 } else {
492 err = -EIO;
493 }
494 mlxsw_emad_trans_finish(trans, err);
495}
496
497static void mlxsw_emad_trans_timeout_work(struct work_struct *work)
498{
499 struct mlxsw_reg_trans *trans = container_of(work,
500 struct mlxsw_reg_trans,
501 timeout_dw.work);
502
503 if (!atomic_dec_and_test(&trans->active))
504 return;
505
506 mlxsw_emad_transmit_retry(trans->core, trans);
507}
508
509static void mlxsw_emad_process_response(struct mlxsw_core *mlxsw_core,
510 struct mlxsw_reg_trans *trans,
511 struct sk_buff *skb)
512{
513 int err;
514
515 if (!atomic_dec_and_test(&trans->active))
516 return;
517
518 err = mlxsw_emad_process_status_skb(skb, &trans->emad_status);
519 if (err == -EAGAIN) {
520 mlxsw_emad_transmit_retry(mlxsw_core, trans);
521 } else {
522 if (err == 0) {
523 char *op_tlv = mlxsw_emad_op_tlv(skb);
524
525 if (trans->cb)
526 trans->cb(mlxsw_core,
527 mlxsw_emad_reg_payload(op_tlv),
528 trans->reg->len, trans->cb_priv);
529 }
530 mlxsw_emad_trans_finish(trans, err);
531 }
532}
533
534/* called with rcu read lock held */
535static void mlxsw_emad_rx_listener_func(struct sk_buff *skb, u8 local_port,
536 void *priv)
537{
538 struct mlxsw_core *mlxsw_core = priv;
539 struct mlxsw_reg_trans *trans;
540
541 trace_devlink_hwmsg(priv_to_devlink(mlxsw_core), true, 0,
542 skb->data, skb->len);
543
544 if (!mlxsw_emad_is_resp(skb))
545 goto free_skb;
546
547 list_for_each_entry_rcu(trans, &mlxsw_core->emad.trans_list, list) {
548 if (mlxsw_emad_get_tid(skb) == trans->tid) {
549 mlxsw_emad_process_response(mlxsw_core, trans, skb);
550 break;
551 }
552 }
553
554free_skb:
555 dev_kfree_skb(skb);
556}
557
558static const struct mlxsw_listener mlxsw_emad_rx_listener =
559 MLXSW_RXL(mlxsw_emad_rx_listener_func, ETHEMAD, TRAP_TO_CPU, false,
560 EMAD, DISCARD);
561
562static int mlxsw_emad_init(struct mlxsw_core *mlxsw_core)
563{
564 struct workqueue_struct *emad_wq;
565 u64 tid;
566 int err;
567
568 if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX))
569 return 0;
570
571 emad_wq = alloc_workqueue("mlxsw_core_emad", WQ_MEM_RECLAIM, 0);
572 if (!emad_wq)
573 return -ENOMEM;
574 mlxsw_core->emad_wq = emad_wq;
575
576 /* Set the upper 32 bits of the transaction ID field to a random
577 * number. This allows us to discard EMADs addressed to other
578 * devices.
579 */
580 get_random_bytes(&tid, 4);
581 tid <<= 32;
582 atomic64_set(&mlxsw_core->emad.tid, tid);
583
584 INIT_LIST_HEAD(&mlxsw_core->emad.trans_list);
585 spin_lock_init(&mlxsw_core->emad.trans_list_lock);
586
587 err = mlxsw_core_trap_register(mlxsw_core, &mlxsw_emad_rx_listener,
588 mlxsw_core);
589 if (err)
590 return err;
591
592 err = mlxsw_core->driver->basic_trap_groups_set(mlxsw_core);
593 if (err)
594 goto err_emad_trap_set;
595 mlxsw_core->emad.use_emad = true;
596
597 return 0;
598
599err_emad_trap_set:
600 mlxsw_core_trap_unregister(mlxsw_core, &mlxsw_emad_rx_listener,
601 mlxsw_core);
602 destroy_workqueue(mlxsw_core->emad_wq);
603 return err;
604}
605
606static void mlxsw_emad_fini(struct mlxsw_core *mlxsw_core)
607{
608
609 if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX))
610 return;
611
612 mlxsw_core->emad.use_emad = false;
613 mlxsw_core_trap_unregister(mlxsw_core, &mlxsw_emad_rx_listener,
614 mlxsw_core);
615 destroy_workqueue(mlxsw_core->emad_wq);
616}
617
618static struct sk_buff *mlxsw_emad_alloc(const struct mlxsw_core *mlxsw_core,
619 u16 reg_len)
620{
621 struct sk_buff *skb;
622 u16 emad_len;
623
624 emad_len = (reg_len + sizeof(u32) + MLXSW_EMAD_ETH_HDR_LEN +
625 (MLXSW_EMAD_OP_TLV_LEN + MLXSW_EMAD_END_TLV_LEN) *
626 sizeof(u32) + mlxsw_core->driver->txhdr_len);
627 if (emad_len > MLXSW_EMAD_MAX_FRAME_LEN)
628 return NULL;
629
630 skb = netdev_alloc_skb(NULL, emad_len);
631 if (!skb)
632 return NULL;
633 memset(skb->data, 0, emad_len);
634 skb_reserve(skb, emad_len);
635
636 return skb;
637}
638
639static int mlxsw_emad_reg_access(struct mlxsw_core *mlxsw_core,
640 const struct mlxsw_reg_info *reg,
641 char *payload,
642 enum mlxsw_core_reg_access_type type,
643 struct mlxsw_reg_trans *trans,
644 struct list_head *bulk_list,
645 mlxsw_reg_trans_cb_t *cb,
646 unsigned long cb_priv, u64 tid)
647{
648 struct sk_buff *skb;
649 int err;
650
651 dev_dbg(mlxsw_core->bus_info->dev, "EMAD reg access (tid=%llx,reg_id=%x(%s),type=%s)\n",
652 tid, reg->id, mlxsw_reg_id_str(reg->id),
653 mlxsw_core_reg_access_type_str(type));
654
655 skb = mlxsw_emad_alloc(mlxsw_core, reg->len);
656 if (!skb)
657 return -ENOMEM;
658
659 list_add_tail(&trans->bulk_list, bulk_list);
660 trans->core = mlxsw_core;
661 trans->tx_skb = skb;
662 trans->tx_info.local_port = MLXSW_PORT_CPU_PORT;
663 trans->tx_info.is_emad = true;
664 INIT_DELAYED_WORK(&trans->timeout_dw, mlxsw_emad_trans_timeout_work);
665 trans->tid = tid;
666 init_completion(&trans->completion);
667 trans->cb = cb;
668 trans->cb_priv = cb_priv;
669 trans->reg = reg;
670 trans->type = type;
671
672 mlxsw_emad_construct(skb, reg, payload, type, trans->tid);
673 mlxsw_core->driver->txhdr_construct(skb, &trans->tx_info);
674
675 spin_lock_bh(&mlxsw_core->emad.trans_list_lock);
676 list_add_tail_rcu(&trans->list, &mlxsw_core->emad.trans_list);
677 spin_unlock_bh(&mlxsw_core->emad.trans_list_lock);
678 err = mlxsw_emad_transmit(mlxsw_core, trans);
679 if (err)
680 goto err_out;
681 return 0;
682
683err_out:
684 spin_lock_bh(&mlxsw_core->emad.trans_list_lock);
685 list_del_rcu(&trans->list);
686 spin_unlock_bh(&mlxsw_core->emad.trans_list_lock);
687 list_del(&trans->bulk_list);
688 dev_kfree_skb(trans->tx_skb);
689 return err;
690}
691
692/*****************
693 * Core functions
694 *****************/
695
696int mlxsw_core_driver_register(struct mlxsw_driver *mlxsw_driver)
697{
698 spin_lock(&mlxsw_core_driver_list_lock);
699 list_add_tail(&mlxsw_driver->list, &mlxsw_core_driver_list);
700 spin_unlock(&mlxsw_core_driver_list_lock);
701 return 0;
702}
703EXPORT_SYMBOL(mlxsw_core_driver_register);
704
705void mlxsw_core_driver_unregister(struct mlxsw_driver *mlxsw_driver)
706{
707 spin_lock(&mlxsw_core_driver_list_lock);
708 list_del(&mlxsw_driver->list);
709 spin_unlock(&mlxsw_core_driver_list_lock);
710}
711EXPORT_SYMBOL(mlxsw_core_driver_unregister);
712
713static struct mlxsw_driver *__driver_find(const char *kind)
714{
715 struct mlxsw_driver *mlxsw_driver;
716
717 list_for_each_entry(mlxsw_driver, &mlxsw_core_driver_list, list) {
718 if (strcmp(mlxsw_driver->kind, kind) == 0)
719 return mlxsw_driver;
720 }
721 return NULL;
722}
723
724static struct mlxsw_driver *mlxsw_core_driver_get(const char *kind)
725{
726 struct mlxsw_driver *mlxsw_driver;
727
728 spin_lock(&mlxsw_core_driver_list_lock);
729 mlxsw_driver = __driver_find(kind);
730 spin_unlock(&mlxsw_core_driver_list_lock);
731 return mlxsw_driver;
732}
733
734static int mlxsw_devlink_port_split(struct devlink *devlink,
735 unsigned int port_index,
736 unsigned int count,
737 struct netlink_ext_ack *extack)
738{
739 struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
740
741 if (port_index >= mlxsw_core->max_ports) {
742 NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports");
743 return -EINVAL;
744 }
745 if (!mlxsw_core->driver->port_split)
746 return -EOPNOTSUPP;
747 return mlxsw_core->driver->port_split(mlxsw_core, port_index, count,
748 extack);
749}
750
751static int mlxsw_devlink_port_unsplit(struct devlink *devlink,
752 unsigned int port_index,
753 struct netlink_ext_ack *extack)
754{
755 struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
756
757 if (port_index >= mlxsw_core->max_ports) {
758 NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports");
759 return -EINVAL;
760 }
761 if (!mlxsw_core->driver->port_unsplit)
762 return -EOPNOTSUPP;
763 return mlxsw_core->driver->port_unsplit(mlxsw_core, port_index,
764 extack);
765}
766
767static int
768mlxsw_devlink_sb_pool_get(struct devlink *devlink,
769 unsigned int sb_index, u16 pool_index,
770 struct devlink_sb_pool_info *pool_info)
771{
772 struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
773 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
774
775 if (!mlxsw_driver->sb_pool_get)
776 return -EOPNOTSUPP;
777 return mlxsw_driver->sb_pool_get(mlxsw_core, sb_index,
778 pool_index, pool_info);
779}
780
781static int
782mlxsw_devlink_sb_pool_set(struct devlink *devlink,
783 unsigned int sb_index, u16 pool_index, u32 size,
784 enum devlink_sb_threshold_type threshold_type)
785{
786 struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
787 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
788
789 if (!mlxsw_driver->sb_pool_set)
790 return -EOPNOTSUPP;
791 return mlxsw_driver->sb_pool_set(mlxsw_core, sb_index,
792 pool_index, size, threshold_type);
793}
794
795static void *__dl_port(struct devlink_port *devlink_port)
796{
797 return container_of(devlink_port, struct mlxsw_core_port, devlink_port);
798}
799
800static int mlxsw_devlink_port_type_set(struct devlink_port *devlink_port,
801 enum devlink_port_type port_type)
802{
803 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
804 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
805 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
806
807 if (!mlxsw_driver->port_type_set)
808 return -EOPNOTSUPP;
809
810 return mlxsw_driver->port_type_set(mlxsw_core,
811 mlxsw_core_port->local_port,
812 port_type);
813}
814
815static int mlxsw_devlink_sb_port_pool_get(struct devlink_port *devlink_port,
816 unsigned int sb_index, u16 pool_index,
817 u32 *p_threshold)
818{
819 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
820 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
821 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
822
823 if (!mlxsw_driver->sb_port_pool_get ||
824 !mlxsw_core_port_check(mlxsw_core_port))
825 return -EOPNOTSUPP;
826 return mlxsw_driver->sb_port_pool_get(mlxsw_core_port, sb_index,
827 pool_index, p_threshold);
828}
829
830static int mlxsw_devlink_sb_port_pool_set(struct devlink_port *devlink_port,
831 unsigned int sb_index, u16 pool_index,
832 u32 threshold)
833{
834 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
835 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
836 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
837
838 if (!mlxsw_driver->sb_port_pool_set ||
839 !mlxsw_core_port_check(mlxsw_core_port))
840 return -EOPNOTSUPP;
841 return mlxsw_driver->sb_port_pool_set(mlxsw_core_port, sb_index,
842 pool_index, threshold);
843}
844
845static int
846mlxsw_devlink_sb_tc_pool_bind_get(struct devlink_port *devlink_port,
847 unsigned int sb_index, u16 tc_index,
848 enum devlink_sb_pool_type pool_type,
849 u16 *p_pool_index, u32 *p_threshold)
850{
851 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
852 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
853 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
854
855 if (!mlxsw_driver->sb_tc_pool_bind_get ||
856 !mlxsw_core_port_check(mlxsw_core_port))
857 return -EOPNOTSUPP;
858 return mlxsw_driver->sb_tc_pool_bind_get(mlxsw_core_port, sb_index,
859 tc_index, pool_type,
860 p_pool_index, p_threshold);
861}
862
863static int
864mlxsw_devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
865 unsigned int sb_index, u16 tc_index,
866 enum devlink_sb_pool_type pool_type,
867 u16 pool_index, u32 threshold)
868{
869 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
870 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
871 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
872
873 if (!mlxsw_driver->sb_tc_pool_bind_set ||
874 !mlxsw_core_port_check(mlxsw_core_port))
875 return -EOPNOTSUPP;
876 return mlxsw_driver->sb_tc_pool_bind_set(mlxsw_core_port, sb_index,
877 tc_index, pool_type,
878 pool_index, threshold);
879}
880
881static int mlxsw_devlink_sb_occ_snapshot(struct devlink *devlink,
882 unsigned int sb_index)
883{
884 struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
885 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
886
887 if (!mlxsw_driver->sb_occ_snapshot)
888 return -EOPNOTSUPP;
889 return mlxsw_driver->sb_occ_snapshot(mlxsw_core, sb_index);
890}
891
892static int mlxsw_devlink_sb_occ_max_clear(struct devlink *devlink,
893 unsigned int sb_index)
894{
895 struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
896 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
897
898 if (!mlxsw_driver->sb_occ_max_clear)
899 return -EOPNOTSUPP;
900 return mlxsw_driver->sb_occ_max_clear(mlxsw_core, sb_index);
901}
902
903static int
904mlxsw_devlink_sb_occ_port_pool_get(struct devlink_port *devlink_port,
905 unsigned int sb_index, u16 pool_index,
906 u32 *p_cur, u32 *p_max)
907{
908 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
909 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
910 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
911
912 if (!mlxsw_driver->sb_occ_port_pool_get ||
913 !mlxsw_core_port_check(mlxsw_core_port))
914 return -EOPNOTSUPP;
915 return mlxsw_driver->sb_occ_port_pool_get(mlxsw_core_port, sb_index,
916 pool_index, p_cur, p_max);
917}
918
919static int
920mlxsw_devlink_sb_occ_tc_port_bind_get(struct devlink_port *devlink_port,
921 unsigned int sb_index, u16 tc_index,
922 enum devlink_sb_pool_type pool_type,
923 u32 *p_cur, u32 *p_max)
924{
925 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
926 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
927 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
928
929 if (!mlxsw_driver->sb_occ_tc_port_bind_get ||
930 !mlxsw_core_port_check(mlxsw_core_port))
931 return -EOPNOTSUPP;
932 return mlxsw_driver->sb_occ_tc_port_bind_get(mlxsw_core_port,
933 sb_index, tc_index,
934 pool_type, p_cur, p_max);
935}
936
937static int mlxsw_devlink_core_bus_device_reload(struct devlink *devlink,
938 struct netlink_ext_ack *extack)
939{
940 struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
941 int err;
942
943 if (!(mlxsw_core->bus->features & MLXSW_BUS_F_RESET))
944 return -EOPNOTSUPP;
945
946 mlxsw_core_bus_device_unregister(mlxsw_core, true);
947 err = mlxsw_core_bus_device_register(mlxsw_core->bus_info,
948 mlxsw_core->bus,
949 mlxsw_core->bus_priv, true,
950 devlink);
951 mlxsw_core->reload_fail = !!err;
952
953 return err;
954}
955
956static const struct devlink_ops mlxsw_devlink_ops = {
957 .reload = mlxsw_devlink_core_bus_device_reload,
958 .port_type_set = mlxsw_devlink_port_type_set,
959 .port_split = mlxsw_devlink_port_split,
960 .port_unsplit = mlxsw_devlink_port_unsplit,
961 .sb_pool_get = mlxsw_devlink_sb_pool_get,
962 .sb_pool_set = mlxsw_devlink_sb_pool_set,
963 .sb_port_pool_get = mlxsw_devlink_sb_port_pool_get,
964 .sb_port_pool_set = mlxsw_devlink_sb_port_pool_set,
965 .sb_tc_pool_bind_get = mlxsw_devlink_sb_tc_pool_bind_get,
966 .sb_tc_pool_bind_set = mlxsw_devlink_sb_tc_pool_bind_set,
967 .sb_occ_snapshot = mlxsw_devlink_sb_occ_snapshot,
968 .sb_occ_max_clear = mlxsw_devlink_sb_occ_max_clear,
969 .sb_occ_port_pool_get = mlxsw_devlink_sb_occ_port_pool_get,
970 .sb_occ_tc_port_bind_get = mlxsw_devlink_sb_occ_tc_port_bind_get,
971};
972
973static int
974__mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
975 const struct mlxsw_bus *mlxsw_bus,
976 void *bus_priv, bool reload,
977 struct devlink *devlink)
978{
979 const char *device_kind = mlxsw_bus_info->device_kind;
980 struct mlxsw_core *mlxsw_core;
981 struct mlxsw_driver *mlxsw_driver;
982 struct mlxsw_res *res;
983 size_t alloc_size;
984 int err;
985
986 mlxsw_driver = mlxsw_core_driver_get(device_kind);
987 if (!mlxsw_driver)
988 return -EINVAL;
989
990 if (!reload) {
991 alloc_size = sizeof(*mlxsw_core) + mlxsw_driver->priv_size;
992 devlink = devlink_alloc(&mlxsw_devlink_ops, alloc_size);
993 if (!devlink) {
994 err = -ENOMEM;
995 goto err_devlink_alloc;
996 }
997 }
998
999 mlxsw_core = devlink_priv(devlink);
1000 INIT_LIST_HEAD(&mlxsw_core->rx_listener_list);
1001 INIT_LIST_HEAD(&mlxsw_core->event_listener_list);
1002 mlxsw_core->driver = mlxsw_driver;
1003 mlxsw_core->bus = mlxsw_bus;
1004 mlxsw_core->bus_priv = bus_priv;
1005 mlxsw_core->bus_info = mlxsw_bus_info;
1006
1007 res = mlxsw_driver->res_query_enabled ? &mlxsw_core->res : NULL;
1008 err = mlxsw_bus->init(bus_priv, mlxsw_core, mlxsw_driver->profile, res);
1009 if (err)
1010 goto err_bus_init;
1011
1012 if (mlxsw_driver->resources_register && !reload) {
1013 err = mlxsw_driver->resources_register(mlxsw_core);
1014 if (err)
1015 goto err_register_resources;
1016 }
1017
1018 err = mlxsw_ports_init(mlxsw_core);
1019 if (err)
1020 goto err_ports_init;
1021
1022 if (MLXSW_CORE_RES_VALID(mlxsw_core, MAX_LAG) &&
1023 MLXSW_CORE_RES_VALID(mlxsw_core, MAX_LAG_MEMBERS)) {
1024 alloc_size = sizeof(u8) *
1025 MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG) *
1026 MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS);
1027 mlxsw_core->lag.mapping = kzalloc(alloc_size, GFP_KERNEL);
1028 if (!mlxsw_core->lag.mapping) {
1029 err = -ENOMEM;
1030 goto err_alloc_lag_mapping;
1031 }
1032 }
1033
1034 err = mlxsw_emad_init(mlxsw_core);
1035 if (err)
1036 goto err_emad_init;
1037
1038 if (!reload) {
1039 err = devlink_register(devlink, mlxsw_bus_info->dev);
1040 if (err)
1041 goto err_devlink_register;
1042 }
1043
1044 if (mlxsw_driver->params_register && !reload) {
1045 err = mlxsw_driver->params_register(mlxsw_core);
1046 if (err)
1047 goto err_register_params;
1048 }
1049
1050 err = mlxsw_hwmon_init(mlxsw_core, mlxsw_bus_info, &mlxsw_core->hwmon);
1051 if (err)
1052 goto err_hwmon_init;
1053
1054 err = mlxsw_thermal_init(mlxsw_core, mlxsw_bus_info,
1055 &mlxsw_core->thermal);
1056 if (err)
1057 goto err_thermal_init;
1058
1059 if (mlxsw_driver->init) {
1060 err = mlxsw_driver->init(mlxsw_core, mlxsw_bus_info);
1061 if (err)
1062 goto err_driver_init;
1063 }
1064
1065 if (mlxsw_driver->params_register && !reload)
1066 devlink_params_publish(devlink);
1067
1068 return 0;
1069
1070err_driver_init:
1071 mlxsw_thermal_fini(mlxsw_core->thermal);
1072err_thermal_init:
1073 mlxsw_hwmon_fini(mlxsw_core->hwmon);
1074err_hwmon_init:
1075 if (mlxsw_driver->params_unregister && !reload)
1076 mlxsw_driver->params_unregister(mlxsw_core);
1077err_register_params:
1078 if (!reload)
1079 devlink_unregister(devlink);
1080err_devlink_register:
1081 mlxsw_emad_fini(mlxsw_core);
1082err_emad_init:
1083 kfree(mlxsw_core->lag.mapping);
1084err_alloc_lag_mapping:
1085 mlxsw_ports_fini(mlxsw_core);
1086err_ports_init:
1087 if (!reload)
1088 devlink_resources_unregister(devlink, NULL);
1089err_register_resources:
1090 mlxsw_bus->fini(bus_priv);
1091err_bus_init:
1092 if (!reload)
1093 devlink_free(devlink);
1094err_devlink_alloc:
1095 return err;
1096}
1097
1098int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
1099 const struct mlxsw_bus *mlxsw_bus,
1100 void *bus_priv, bool reload,
1101 struct devlink *devlink)
1102{
1103 bool called_again = false;
1104 int err;
1105
1106again:
1107 err = __mlxsw_core_bus_device_register(mlxsw_bus_info, mlxsw_bus,
1108 bus_priv, reload, devlink);
1109 /* -EAGAIN is returned in case the FW was updated. FW needs
1110 * a reset, so lets try to call __mlxsw_core_bus_device_register()
1111 * again.
1112 */
1113 if (err == -EAGAIN && !called_again) {
1114 called_again = true;
1115 goto again;
1116 }
1117
1118 return err;
1119}
1120EXPORT_SYMBOL(mlxsw_core_bus_device_register);
1121
1122void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core,
1123 bool reload)
1124{
1125 struct devlink *devlink = priv_to_devlink(mlxsw_core);
1126
1127 if (mlxsw_core->reload_fail) {
1128 if (!reload)
1129 /* Only the parts that were not de-initialized in the
1130 * failed reload attempt need to be de-initialized.
1131 */
1132 goto reload_fail_deinit;
1133 else
1134 return;
1135 }
1136
1137 if (mlxsw_core->driver->params_unregister && !reload)
1138 devlink_params_unpublish(devlink);
1139 if (mlxsw_core->driver->fini)
1140 mlxsw_core->driver->fini(mlxsw_core);
1141 mlxsw_thermal_fini(mlxsw_core->thermal);
1142 mlxsw_hwmon_fini(mlxsw_core->hwmon);
1143 if (mlxsw_core->driver->params_unregister && !reload)
1144 mlxsw_core->driver->params_unregister(mlxsw_core);
1145 if (!reload)
1146 devlink_unregister(devlink);
1147 mlxsw_emad_fini(mlxsw_core);
1148 kfree(mlxsw_core->lag.mapping);
1149 mlxsw_ports_fini(mlxsw_core);
1150 if (!reload)
1151 devlink_resources_unregister(devlink, NULL);
1152 mlxsw_core->bus->fini(mlxsw_core->bus_priv);
1153
1154 return;
1155
1156reload_fail_deinit:
1157 if (mlxsw_core->driver->params_unregister)
1158 mlxsw_core->driver->params_unregister(mlxsw_core);
1159 devlink_unregister(devlink);
1160 devlink_resources_unregister(devlink, NULL);
1161 devlink_free(devlink);
1162}
1163EXPORT_SYMBOL(mlxsw_core_bus_device_unregister);
1164
1165bool mlxsw_core_skb_transmit_busy(struct mlxsw_core *mlxsw_core,
1166 const struct mlxsw_tx_info *tx_info)
1167{
1168 return mlxsw_core->bus->skb_transmit_busy(mlxsw_core->bus_priv,
1169 tx_info);
1170}
1171EXPORT_SYMBOL(mlxsw_core_skb_transmit_busy);
1172
1173int mlxsw_core_skb_transmit(struct mlxsw_core *mlxsw_core, struct sk_buff *skb,
1174 const struct mlxsw_tx_info *tx_info)
1175{
1176 return mlxsw_core->bus->skb_transmit(mlxsw_core->bus_priv, skb,
1177 tx_info);
1178}
1179EXPORT_SYMBOL(mlxsw_core_skb_transmit);
1180
1181static bool __is_rx_listener_equal(const struct mlxsw_rx_listener *rxl_a,
1182 const struct mlxsw_rx_listener *rxl_b)
1183{
1184 return (rxl_a->func == rxl_b->func &&
1185 rxl_a->local_port == rxl_b->local_port &&
1186 rxl_a->trap_id == rxl_b->trap_id);
1187}
1188
1189static struct mlxsw_rx_listener_item *
1190__find_rx_listener_item(struct mlxsw_core *mlxsw_core,
1191 const struct mlxsw_rx_listener *rxl,
1192 void *priv)
1193{
1194 struct mlxsw_rx_listener_item *rxl_item;
1195
1196 list_for_each_entry(rxl_item, &mlxsw_core->rx_listener_list, list) {
1197 if (__is_rx_listener_equal(&rxl_item->rxl, rxl) &&
1198 rxl_item->priv == priv)
1199 return rxl_item;
1200 }
1201 return NULL;
1202}
1203
1204int mlxsw_core_rx_listener_register(struct mlxsw_core *mlxsw_core,
1205 const struct mlxsw_rx_listener *rxl,
1206 void *priv)
1207{
1208 struct mlxsw_rx_listener_item *rxl_item;
1209
1210 rxl_item = __find_rx_listener_item(mlxsw_core, rxl, priv);
1211 if (rxl_item)
1212 return -EEXIST;
1213 rxl_item = kmalloc(sizeof(*rxl_item), GFP_KERNEL);
1214 if (!rxl_item)
1215 return -ENOMEM;
1216 rxl_item->rxl = *rxl;
1217 rxl_item->priv = priv;
1218
1219 list_add_rcu(&rxl_item->list, &mlxsw_core->rx_listener_list);
1220 return 0;
1221}
1222EXPORT_SYMBOL(mlxsw_core_rx_listener_register);
1223
1224void mlxsw_core_rx_listener_unregister(struct mlxsw_core *mlxsw_core,
1225 const struct mlxsw_rx_listener *rxl,
1226 void *priv)
1227{
1228 struct mlxsw_rx_listener_item *rxl_item;
1229
1230 rxl_item = __find_rx_listener_item(mlxsw_core, rxl, priv);
1231 if (!rxl_item)
1232 return;
1233 list_del_rcu(&rxl_item->list);
1234 synchronize_rcu();
1235 kfree(rxl_item);
1236}
1237EXPORT_SYMBOL(mlxsw_core_rx_listener_unregister);
1238
1239static void mlxsw_core_event_listener_func(struct sk_buff *skb, u8 local_port,
1240 void *priv)
1241{
1242 struct mlxsw_event_listener_item *event_listener_item = priv;
1243 struct mlxsw_reg_info reg;
1244 char *payload;
1245 char *op_tlv = mlxsw_emad_op_tlv(skb);
1246 char *reg_tlv = mlxsw_emad_reg_tlv(skb);
1247
1248 reg.id = mlxsw_emad_op_tlv_register_id_get(op_tlv);
1249 reg.len = (mlxsw_emad_reg_tlv_len_get(reg_tlv) - 1) * sizeof(u32);
1250 payload = mlxsw_emad_reg_payload(op_tlv);
1251 event_listener_item->el.func(&reg, payload, event_listener_item->priv);
1252 dev_kfree_skb(skb);
1253}
1254
1255static bool __is_event_listener_equal(const struct mlxsw_event_listener *el_a,
1256 const struct mlxsw_event_listener *el_b)
1257{
1258 return (el_a->func == el_b->func &&
1259 el_a->trap_id == el_b->trap_id);
1260}
1261
1262static struct mlxsw_event_listener_item *
1263__find_event_listener_item(struct mlxsw_core *mlxsw_core,
1264 const struct mlxsw_event_listener *el,
1265 void *priv)
1266{
1267 struct mlxsw_event_listener_item *el_item;
1268
1269 list_for_each_entry(el_item, &mlxsw_core->event_listener_list, list) {
1270 if (__is_event_listener_equal(&el_item->el, el) &&
1271 el_item->priv == priv)
1272 return el_item;
1273 }
1274 return NULL;
1275}
1276
1277int mlxsw_core_event_listener_register(struct mlxsw_core *mlxsw_core,
1278 const struct mlxsw_event_listener *el,
1279 void *priv)
1280{
1281 int err;
1282 struct mlxsw_event_listener_item *el_item;
1283 const struct mlxsw_rx_listener rxl = {
1284 .func = mlxsw_core_event_listener_func,
1285 .local_port = MLXSW_PORT_DONT_CARE,
1286 .trap_id = el->trap_id,
1287 };
1288
1289 el_item = __find_event_listener_item(mlxsw_core, el, priv);
1290 if (el_item)
1291 return -EEXIST;
1292 el_item = kmalloc(sizeof(*el_item), GFP_KERNEL);
1293 if (!el_item)
1294 return -ENOMEM;
1295 el_item->el = *el;
1296 el_item->priv = priv;
1297
1298 err = mlxsw_core_rx_listener_register(mlxsw_core, &rxl, el_item);
1299 if (err)
1300 goto err_rx_listener_register;
1301
1302 /* No reason to save item if we did not manage to register an RX
1303 * listener for it.
1304 */
1305 list_add_rcu(&el_item->list, &mlxsw_core->event_listener_list);
1306
1307 return 0;
1308
1309err_rx_listener_register:
1310 kfree(el_item);
1311 return err;
1312}
1313EXPORT_SYMBOL(mlxsw_core_event_listener_register);
1314
1315void mlxsw_core_event_listener_unregister(struct mlxsw_core *mlxsw_core,
1316 const struct mlxsw_event_listener *el,
1317 void *priv)
1318{
1319 struct mlxsw_event_listener_item *el_item;
1320 const struct mlxsw_rx_listener rxl = {
1321 .func = mlxsw_core_event_listener_func,
1322 .local_port = MLXSW_PORT_DONT_CARE,
1323 .trap_id = el->trap_id,
1324 };
1325
1326 el_item = __find_event_listener_item(mlxsw_core, el, priv);
1327 if (!el_item)
1328 return;
1329 mlxsw_core_rx_listener_unregister(mlxsw_core, &rxl, el_item);
1330 list_del(&el_item->list);
1331 kfree(el_item);
1332}
1333EXPORT_SYMBOL(mlxsw_core_event_listener_unregister);
1334
1335static int mlxsw_core_listener_register(struct mlxsw_core *mlxsw_core,
1336 const struct mlxsw_listener *listener,
1337 void *priv)
1338{
1339 if (listener->is_event)
1340 return mlxsw_core_event_listener_register(mlxsw_core,
1341 &listener->u.event_listener,
1342 priv);
1343 else
1344 return mlxsw_core_rx_listener_register(mlxsw_core,
1345 &listener->u.rx_listener,
1346 priv);
1347}
1348
1349static void mlxsw_core_listener_unregister(struct mlxsw_core *mlxsw_core,
1350 const struct mlxsw_listener *listener,
1351 void *priv)
1352{
1353 if (listener->is_event)
1354 mlxsw_core_event_listener_unregister(mlxsw_core,
1355 &listener->u.event_listener,
1356 priv);
1357 else
1358 mlxsw_core_rx_listener_unregister(mlxsw_core,
1359 &listener->u.rx_listener,
1360 priv);
1361}
1362
1363int mlxsw_core_trap_register(struct mlxsw_core *mlxsw_core,
1364 const struct mlxsw_listener *listener, void *priv)
1365{
1366 char hpkt_pl[MLXSW_REG_HPKT_LEN];
1367 int err;
1368
1369 err = mlxsw_core_listener_register(mlxsw_core, listener, priv);
1370 if (err)
1371 return err;
1372
1373 mlxsw_reg_hpkt_pack(hpkt_pl, listener->action, listener->trap_id,
1374 listener->trap_group, listener->is_ctrl);
1375 err = mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl);
1376 if (err)
1377 goto err_trap_set;
1378
1379 return 0;
1380
1381err_trap_set:
1382 mlxsw_core_listener_unregister(mlxsw_core, listener, priv);
1383 return err;
1384}
1385EXPORT_SYMBOL(mlxsw_core_trap_register);
1386
1387void mlxsw_core_trap_unregister(struct mlxsw_core *mlxsw_core,
1388 const struct mlxsw_listener *listener,
1389 void *priv)
1390{
1391 char hpkt_pl[MLXSW_REG_HPKT_LEN];
1392
1393 if (!listener->is_event) {
1394 mlxsw_reg_hpkt_pack(hpkt_pl, listener->unreg_action,
1395 listener->trap_id, listener->trap_group,
1396 listener->is_ctrl);
1397 mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl);
1398 }
1399
1400 mlxsw_core_listener_unregister(mlxsw_core, listener, priv);
1401}
1402EXPORT_SYMBOL(mlxsw_core_trap_unregister);
1403
1404static u64 mlxsw_core_tid_get(struct mlxsw_core *mlxsw_core)
1405{
1406 return atomic64_inc_return(&mlxsw_core->emad.tid);
1407}
1408
1409static int mlxsw_core_reg_access_emad(struct mlxsw_core *mlxsw_core,
1410 const struct mlxsw_reg_info *reg,
1411 char *payload,
1412 enum mlxsw_core_reg_access_type type,
1413 struct list_head *bulk_list,
1414 mlxsw_reg_trans_cb_t *cb,
1415 unsigned long cb_priv)
1416{
1417 u64 tid = mlxsw_core_tid_get(mlxsw_core);
1418 struct mlxsw_reg_trans *trans;
1419 int err;
1420
1421 trans = kzalloc(sizeof(*trans), GFP_KERNEL);
1422 if (!trans)
1423 return -ENOMEM;
1424
1425 err = mlxsw_emad_reg_access(mlxsw_core, reg, payload, type, trans,
1426 bulk_list, cb, cb_priv, tid);
1427 if (err) {
1428 kfree(trans);
1429 return err;
1430 }
1431 return 0;
1432}
1433
1434int mlxsw_reg_trans_query(struct mlxsw_core *mlxsw_core,
1435 const struct mlxsw_reg_info *reg, char *payload,
1436 struct list_head *bulk_list,
1437 mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv)
1438{
1439 return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload,
1440 MLXSW_CORE_REG_ACCESS_TYPE_QUERY,
1441 bulk_list, cb, cb_priv);
1442}
1443EXPORT_SYMBOL(mlxsw_reg_trans_query);
1444
1445int mlxsw_reg_trans_write(struct mlxsw_core *mlxsw_core,
1446 const struct mlxsw_reg_info *reg, char *payload,
1447 struct list_head *bulk_list,
1448 mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv)
1449{
1450 return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload,
1451 MLXSW_CORE_REG_ACCESS_TYPE_WRITE,
1452 bulk_list, cb, cb_priv);
1453}
1454EXPORT_SYMBOL(mlxsw_reg_trans_write);
1455
1456static int mlxsw_reg_trans_wait(struct mlxsw_reg_trans *trans)
1457{
1458 struct mlxsw_core *mlxsw_core = trans->core;
1459 int err;
1460
1461 wait_for_completion(&trans->completion);
1462 cancel_delayed_work_sync(&trans->timeout_dw);
1463 err = trans->err;
1464
1465 if (trans->retries)
1466 dev_warn(mlxsw_core->bus_info->dev, "EMAD retries (%d/%d) (tid=%llx)\n",
1467 trans->retries, MLXSW_EMAD_MAX_RETRY, trans->tid);
1468 if (err) {
1469 dev_err(mlxsw_core->bus_info->dev, "EMAD reg access failed (tid=%llx,reg_id=%x(%s),type=%s,status=%x(%s))\n",
1470 trans->tid, trans->reg->id,
1471 mlxsw_reg_id_str(trans->reg->id),
1472 mlxsw_core_reg_access_type_str(trans->type),
1473 trans->emad_status,
1474 mlxsw_emad_op_tlv_status_str(trans->emad_status));
1475 trace_devlink_hwerr(priv_to_devlink(mlxsw_core),
1476 trans->emad_status,
1477 mlxsw_emad_op_tlv_status_str(trans->emad_status));
1478 }
1479
1480 list_del(&trans->bulk_list);
1481 kfree_rcu(trans, rcu);
1482 return err;
1483}
1484
1485int mlxsw_reg_trans_bulk_wait(struct list_head *bulk_list)
1486{
1487 struct mlxsw_reg_trans *trans;
1488 struct mlxsw_reg_trans *tmp;
1489 int sum_err = 0;
1490 int err;
1491
1492 list_for_each_entry_safe(trans, tmp, bulk_list, bulk_list) {
1493 err = mlxsw_reg_trans_wait(trans);
1494 if (err && sum_err == 0)
1495 sum_err = err; /* first error to be returned */
1496 }
1497 return sum_err;
1498}
1499EXPORT_SYMBOL(mlxsw_reg_trans_bulk_wait);
1500
1501static int mlxsw_core_reg_access_cmd(struct mlxsw_core *mlxsw_core,
1502 const struct mlxsw_reg_info *reg,
1503 char *payload,
1504 enum mlxsw_core_reg_access_type type)
1505{
1506 enum mlxsw_emad_op_tlv_status status;
1507 int err, n_retry;
1508 bool reset_ok;
1509 char *in_mbox, *out_mbox, *tmp;
1510
1511 dev_dbg(mlxsw_core->bus_info->dev, "Reg cmd access (reg_id=%x(%s),type=%s)\n",
1512 reg->id, mlxsw_reg_id_str(reg->id),
1513 mlxsw_core_reg_access_type_str(type));
1514
1515 in_mbox = mlxsw_cmd_mbox_alloc();
1516 if (!in_mbox)
1517 return -ENOMEM;
1518
1519 out_mbox = mlxsw_cmd_mbox_alloc();
1520 if (!out_mbox) {
1521 err = -ENOMEM;
1522 goto free_in_mbox;
1523 }
1524
1525 mlxsw_emad_pack_op_tlv(in_mbox, reg, type,
1526 mlxsw_core_tid_get(mlxsw_core));
1527 tmp = in_mbox + MLXSW_EMAD_OP_TLV_LEN * sizeof(u32);
1528 mlxsw_emad_pack_reg_tlv(tmp, reg, payload);
1529
1530 /* There is a special treatment needed for MRSR (reset) register.
1531 * The command interface will return error after the command
1532 * is executed, so tell the lower layer to expect it
1533 * and cope accordingly.
1534 */
1535 reset_ok = reg->id == MLXSW_REG_MRSR_ID;
1536
1537 n_retry = 0;
1538retry:
1539 err = mlxsw_cmd_access_reg(mlxsw_core, reset_ok, in_mbox, out_mbox);
1540 if (!err) {
1541 err = mlxsw_emad_process_status(out_mbox, &status);
1542 if (err) {
1543 if (err == -EAGAIN && n_retry++ < MLXSW_EMAD_MAX_RETRY)
1544 goto retry;
1545 dev_err(mlxsw_core->bus_info->dev, "Reg cmd access status failed (status=%x(%s))\n",
1546 status, mlxsw_emad_op_tlv_status_str(status));
1547 }
1548 }
1549
1550 if (!err)
1551 memcpy(payload, mlxsw_emad_reg_payload(out_mbox),
1552 reg->len);
1553
1554 mlxsw_cmd_mbox_free(out_mbox);
1555free_in_mbox:
1556 mlxsw_cmd_mbox_free(in_mbox);
1557 if (err)
1558 dev_err(mlxsw_core->bus_info->dev, "Reg cmd access failed (reg_id=%x(%s),type=%s)\n",
1559 reg->id, mlxsw_reg_id_str(reg->id),
1560 mlxsw_core_reg_access_type_str(type));
1561 return err;
1562}
1563
1564static void mlxsw_core_reg_access_cb(struct mlxsw_core *mlxsw_core,
1565 char *payload, size_t payload_len,
1566 unsigned long cb_priv)
1567{
1568 char *orig_payload = (char *) cb_priv;
1569
1570 memcpy(orig_payload, payload, payload_len);
1571}
1572
1573static int mlxsw_core_reg_access(struct mlxsw_core *mlxsw_core,
1574 const struct mlxsw_reg_info *reg,
1575 char *payload,
1576 enum mlxsw_core_reg_access_type type)
1577{
1578 LIST_HEAD(bulk_list);
1579 int err;
1580
1581 /* During initialization EMAD interface is not available to us,
1582 * so we default to command interface. We switch to EMAD interface
1583 * after setting the appropriate traps.
1584 */
1585 if (!mlxsw_core->emad.use_emad)
1586 return mlxsw_core_reg_access_cmd(mlxsw_core, reg,
1587 payload, type);
1588
1589 err = mlxsw_core_reg_access_emad(mlxsw_core, reg,
1590 payload, type, &bulk_list,
1591 mlxsw_core_reg_access_cb,
1592 (unsigned long) payload);
1593 if (err)
1594 return err;
1595 return mlxsw_reg_trans_bulk_wait(&bulk_list);
1596}
1597
1598int mlxsw_reg_query(struct mlxsw_core *mlxsw_core,
1599 const struct mlxsw_reg_info *reg, char *payload)
1600{
1601 return mlxsw_core_reg_access(mlxsw_core, reg, payload,
1602 MLXSW_CORE_REG_ACCESS_TYPE_QUERY);
1603}
1604EXPORT_SYMBOL(mlxsw_reg_query);
1605
1606int mlxsw_reg_write(struct mlxsw_core *mlxsw_core,
1607 const struct mlxsw_reg_info *reg, char *payload)
1608{
1609 return mlxsw_core_reg_access(mlxsw_core, reg, payload,
1610 MLXSW_CORE_REG_ACCESS_TYPE_WRITE);
1611}
1612EXPORT_SYMBOL(mlxsw_reg_write);
1613
1614void mlxsw_core_skb_receive(struct mlxsw_core *mlxsw_core, struct sk_buff *skb,
1615 struct mlxsw_rx_info *rx_info)
1616{
1617 struct mlxsw_rx_listener_item *rxl_item;
1618 const struct mlxsw_rx_listener *rxl;
1619 u8 local_port;
1620 bool found = false;
1621
1622 if (rx_info->is_lag) {
1623 dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: lag_id = %d, lag_port_index = 0x%x\n",
1624 __func__, rx_info->u.lag_id,
1625 rx_info->trap_id);
1626 /* Upper layer does not care if the skb came from LAG or not,
1627 * so just get the local_port for the lag port and push it up.
1628 */
1629 local_port = mlxsw_core_lag_mapping_get(mlxsw_core,
1630 rx_info->u.lag_id,
1631 rx_info->lag_port_index);
1632 } else {
1633 local_port = rx_info->u.sys_port;
1634 }
1635
1636 dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: local_port = %d, trap_id = 0x%x\n",
1637 __func__, local_port, rx_info->trap_id);
1638
1639 if ((rx_info->trap_id >= MLXSW_TRAP_ID_MAX) ||
1640 (local_port >= mlxsw_core->max_ports))
1641 goto drop;
1642
1643 rcu_read_lock();
1644 list_for_each_entry_rcu(rxl_item, &mlxsw_core->rx_listener_list, list) {
1645 rxl = &rxl_item->rxl;
1646 if ((rxl->local_port == MLXSW_PORT_DONT_CARE ||
1647 rxl->local_port == local_port) &&
1648 rxl->trap_id == rx_info->trap_id) {
1649 found = true;
1650 break;
1651 }
1652 }
1653 rcu_read_unlock();
1654 if (!found)
1655 goto drop;
1656
1657 rxl->func(skb, local_port, rxl_item->priv);
1658 return;
1659
1660drop:
1661 dev_kfree_skb(skb);
1662}
1663EXPORT_SYMBOL(mlxsw_core_skb_receive);
1664
1665static int mlxsw_core_lag_mapping_index(struct mlxsw_core *mlxsw_core,
1666 u16 lag_id, u8 port_index)
1667{
1668 return MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS) * lag_id +
1669 port_index;
1670}
1671
1672void mlxsw_core_lag_mapping_set(struct mlxsw_core *mlxsw_core,
1673 u16 lag_id, u8 port_index, u8 local_port)
1674{
1675 int index = mlxsw_core_lag_mapping_index(mlxsw_core,
1676 lag_id, port_index);
1677
1678 mlxsw_core->lag.mapping[index] = local_port;
1679}
1680EXPORT_SYMBOL(mlxsw_core_lag_mapping_set);
1681
1682u8 mlxsw_core_lag_mapping_get(struct mlxsw_core *mlxsw_core,
1683 u16 lag_id, u8 port_index)
1684{
1685 int index = mlxsw_core_lag_mapping_index(mlxsw_core,
1686 lag_id, port_index);
1687
1688 return mlxsw_core->lag.mapping[index];
1689}
1690EXPORT_SYMBOL(mlxsw_core_lag_mapping_get);
1691
1692void mlxsw_core_lag_mapping_clear(struct mlxsw_core *mlxsw_core,
1693 u16 lag_id, u8 local_port)
1694{
1695 int i;
1696
1697 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS); i++) {
1698 int index = mlxsw_core_lag_mapping_index(mlxsw_core,
1699 lag_id, i);
1700
1701 if (mlxsw_core->lag.mapping[index] == local_port)
1702 mlxsw_core->lag.mapping[index] = 0;
1703 }
1704}
1705EXPORT_SYMBOL(mlxsw_core_lag_mapping_clear);
1706
1707bool mlxsw_core_res_valid(struct mlxsw_core *mlxsw_core,
1708 enum mlxsw_res_id res_id)
1709{
1710 return mlxsw_res_valid(&mlxsw_core->res, res_id);
1711}
1712EXPORT_SYMBOL(mlxsw_core_res_valid);
1713
1714u64 mlxsw_core_res_get(struct mlxsw_core *mlxsw_core,
1715 enum mlxsw_res_id res_id)
1716{
1717 return mlxsw_res_get(&mlxsw_core->res, res_id);
1718}
1719EXPORT_SYMBOL(mlxsw_core_res_get);
1720
1721int mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u8 local_port)
1722{
1723 struct devlink *devlink = priv_to_devlink(mlxsw_core);
1724 struct mlxsw_core_port *mlxsw_core_port =
1725 &mlxsw_core->ports[local_port];
1726 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1727 int err;
1728
1729 mlxsw_core_port->local_port = local_port;
1730 err = devlink_port_register(devlink, devlink_port, local_port);
1731 if (err)
1732 memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port));
1733 return err;
1734}
1735EXPORT_SYMBOL(mlxsw_core_port_init);
1736
1737void mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u8 local_port)
1738{
1739 struct mlxsw_core_port *mlxsw_core_port =
1740 &mlxsw_core->ports[local_port];
1741 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1742
1743 devlink_port_unregister(devlink_port);
1744 memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port));
1745}
1746EXPORT_SYMBOL(mlxsw_core_port_fini);
1747
1748void mlxsw_core_port_eth_set(struct mlxsw_core *mlxsw_core, u8 local_port,
1749 void *port_driver_priv, struct net_device *dev,
1750 u32 port_number, bool split,
1751 u32 split_port_subnumber)
1752{
1753 struct mlxsw_core_port *mlxsw_core_port =
1754 &mlxsw_core->ports[local_port];
1755 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1756
1757 mlxsw_core_port->port_driver_priv = port_driver_priv;
1758 devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PHYSICAL,
1759 port_number, split, split_port_subnumber);
1760 devlink_port_type_eth_set(devlink_port, dev);
1761}
1762EXPORT_SYMBOL(mlxsw_core_port_eth_set);
1763
1764void mlxsw_core_port_ib_set(struct mlxsw_core *mlxsw_core, u8 local_port,
1765 void *port_driver_priv)
1766{
1767 struct mlxsw_core_port *mlxsw_core_port =
1768 &mlxsw_core->ports[local_port];
1769 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1770
1771 mlxsw_core_port->port_driver_priv = port_driver_priv;
1772 devlink_port_type_ib_set(devlink_port, NULL);
1773}
1774EXPORT_SYMBOL(mlxsw_core_port_ib_set);
1775
1776void mlxsw_core_port_clear(struct mlxsw_core *mlxsw_core, u8 local_port,
1777 void *port_driver_priv)
1778{
1779 struct mlxsw_core_port *mlxsw_core_port =
1780 &mlxsw_core->ports[local_port];
1781 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1782
1783 mlxsw_core_port->port_driver_priv = port_driver_priv;
1784 devlink_port_type_clear(devlink_port);
1785}
1786EXPORT_SYMBOL(mlxsw_core_port_clear);
1787
1788enum devlink_port_type mlxsw_core_port_type_get(struct mlxsw_core *mlxsw_core,
1789 u8 local_port)
1790{
1791 struct mlxsw_core_port *mlxsw_core_port =
1792 &mlxsw_core->ports[local_port];
1793 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1794
1795 return devlink_port->type;
1796}
1797EXPORT_SYMBOL(mlxsw_core_port_type_get);
1798
1799int mlxsw_core_port_get_phys_port_name(struct mlxsw_core *mlxsw_core,
1800 u8 local_port, char *name, size_t len)
1801{
1802 struct mlxsw_core_port *mlxsw_core_port =
1803 &mlxsw_core->ports[local_port];
1804 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1805
1806 return devlink_port_get_phys_port_name(devlink_port, name, len);
1807}
1808EXPORT_SYMBOL(mlxsw_core_port_get_phys_port_name);
1809
1810static void mlxsw_core_buf_dump_dbg(struct mlxsw_core *mlxsw_core,
1811 const char *buf, size_t size)
1812{
1813 __be32 *m = (__be32 *) buf;
1814 int i;
1815 int count = size / sizeof(__be32);
1816
1817 for (i = count - 1; i >= 0; i--)
1818 if (m[i])
1819 break;
1820 i++;
1821 count = i ? i : 1;
1822 for (i = 0; i < count; i += 4)
1823 dev_dbg(mlxsw_core->bus_info->dev, "%04x - %08x %08x %08x %08x\n",
1824 i * 4, be32_to_cpu(m[i]), be32_to_cpu(m[i + 1]),
1825 be32_to_cpu(m[i + 2]), be32_to_cpu(m[i + 3]));
1826}
1827
1828int mlxsw_cmd_exec(struct mlxsw_core *mlxsw_core, u16 opcode, u8 opcode_mod,
1829 u32 in_mod, bool out_mbox_direct, bool reset_ok,
1830 char *in_mbox, size_t in_mbox_size,
1831 char *out_mbox, size_t out_mbox_size)
1832{
1833 u8 status;
1834 int err;
1835
1836 BUG_ON(in_mbox_size % sizeof(u32) || out_mbox_size % sizeof(u32));
1837 if (!mlxsw_core->bus->cmd_exec)
1838 return -EOPNOTSUPP;
1839
1840 dev_dbg(mlxsw_core->bus_info->dev, "Cmd exec (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n",
1841 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, in_mod);
1842 if (in_mbox) {
1843 dev_dbg(mlxsw_core->bus_info->dev, "Input mailbox:\n");
1844 mlxsw_core_buf_dump_dbg(mlxsw_core, in_mbox, in_mbox_size);
1845 }
1846
1847 err = mlxsw_core->bus->cmd_exec(mlxsw_core->bus_priv, opcode,
1848 opcode_mod, in_mod, out_mbox_direct,
1849 in_mbox, in_mbox_size,
1850 out_mbox, out_mbox_size, &status);
1851
1852 if (!err && out_mbox) {
1853 dev_dbg(mlxsw_core->bus_info->dev, "Output mailbox:\n");
1854 mlxsw_core_buf_dump_dbg(mlxsw_core, out_mbox, out_mbox_size);
1855 }
1856
1857 if (reset_ok && err == -EIO &&
1858 status == MLXSW_CMD_STATUS_RUNNING_RESET) {
1859 err = 0;
1860 } else if (err == -EIO && status != MLXSW_CMD_STATUS_OK) {
1861 dev_err(mlxsw_core->bus_info->dev, "Cmd exec failed (opcode=%x(%s),opcode_mod=%x,in_mod=%x,status=%x(%s))\n",
1862 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod,
1863 in_mod, status, mlxsw_cmd_status_str(status));
1864 } else if (err == -ETIMEDOUT) {
1865 dev_err(mlxsw_core->bus_info->dev, "Cmd exec timed-out (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n",
1866 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod,
1867 in_mod);
1868 }
1869
1870 return err;
1871}
1872EXPORT_SYMBOL(mlxsw_cmd_exec);
1873
1874int mlxsw_core_schedule_dw(struct delayed_work *dwork, unsigned long delay)
1875{
1876 return queue_delayed_work(mlxsw_wq, dwork, delay);
1877}
1878EXPORT_SYMBOL(mlxsw_core_schedule_dw);
1879
1880bool mlxsw_core_schedule_work(struct work_struct *work)
1881{
1882 return queue_work(mlxsw_owq, work);
1883}
1884EXPORT_SYMBOL(mlxsw_core_schedule_work);
1885
1886void mlxsw_core_flush_owq(void)
1887{
1888 flush_workqueue(mlxsw_owq);
1889}
1890EXPORT_SYMBOL(mlxsw_core_flush_owq);
1891
1892int mlxsw_core_kvd_sizes_get(struct mlxsw_core *mlxsw_core,
1893 const struct mlxsw_config_profile *profile,
1894 u64 *p_single_size, u64 *p_double_size,
1895 u64 *p_linear_size)
1896{
1897 struct mlxsw_driver *driver = mlxsw_core->driver;
1898
1899 if (!driver->kvd_sizes_get)
1900 return -EINVAL;
1901
1902 return driver->kvd_sizes_get(mlxsw_core, profile,
1903 p_single_size, p_double_size,
1904 p_linear_size);
1905}
1906EXPORT_SYMBOL(mlxsw_core_kvd_sizes_get);
1907
1908void mlxsw_core_fw_flash_start(struct mlxsw_core *mlxsw_core)
1909{
1910 mlxsw_core->fw_flash_in_progress = true;
1911}
1912EXPORT_SYMBOL(mlxsw_core_fw_flash_start);
1913
1914void mlxsw_core_fw_flash_end(struct mlxsw_core *mlxsw_core)
1915{
1916 mlxsw_core->fw_flash_in_progress = false;
1917}
1918EXPORT_SYMBOL(mlxsw_core_fw_flash_end);
1919
1920int mlxsw_core_resources_query(struct mlxsw_core *mlxsw_core, char *mbox,
1921 struct mlxsw_res *res)
1922{
1923 int index, i;
1924 u64 data;
1925 u16 id;
1926 int err;
1927
1928 if (!res)
1929 return 0;
1930
1931 mlxsw_cmd_mbox_zero(mbox);
1932
1933 for (index = 0; index < MLXSW_CMD_QUERY_RESOURCES_MAX_QUERIES;
1934 index++) {
1935 err = mlxsw_cmd_query_resources(mlxsw_core, mbox, index);
1936 if (err)
1937 return err;
1938
1939 for (i = 0; i < MLXSW_CMD_QUERY_RESOURCES_PER_QUERY; i++) {
1940 id = mlxsw_cmd_mbox_query_resource_id_get(mbox, i);
1941 data = mlxsw_cmd_mbox_query_resource_data_get(mbox, i);
1942
1943 if (id == MLXSW_CMD_QUERY_RESOURCES_TABLE_END_ID)
1944 return 0;
1945
1946 mlxsw_res_parse(res, id, data);
1947 }
1948 }
1949
1950 /* If after MLXSW_RESOURCES_QUERY_MAX_QUERIES we still didn't get
1951 * MLXSW_RESOURCES_TABLE_END_ID, something went bad in the FW.
1952 */
1953 return -EIO;
1954}
1955EXPORT_SYMBOL(mlxsw_core_resources_query);
1956
1957static int __init mlxsw_core_module_init(void)
1958{
1959 int err;
1960
1961 mlxsw_wq = alloc_workqueue(mlxsw_core_driver_name, WQ_MEM_RECLAIM, 0);
1962 if (!mlxsw_wq)
1963 return -ENOMEM;
1964 mlxsw_owq = alloc_ordered_workqueue("%s_ordered", WQ_MEM_RECLAIM,
1965 mlxsw_core_driver_name);
1966 if (!mlxsw_owq) {
1967 err = -ENOMEM;
1968 goto err_alloc_ordered_workqueue;
1969 }
1970 return 0;
1971
1972err_alloc_ordered_workqueue:
1973 destroy_workqueue(mlxsw_wq);
1974 return err;
1975}
1976
1977static void __exit mlxsw_core_module_exit(void)
1978{
1979 destroy_workqueue(mlxsw_owq);
1980 destroy_workqueue(mlxsw_wq);
1981}
1982
1983module_init(mlxsw_core_module_init);
1984module_exit(mlxsw_core_module_exit);
1985
1986MODULE_LICENSE("Dual BSD/GPL");
1987MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
1988MODULE_DESCRIPTION("Mellanox switch device core driver");
1989