1 /* 2 * drivers/net/ethernet/mellanox/mlxsw/core.c 3 * Copyright (c) 2015 Mellanox Technologies. All rights reserved. 4 * Copyright (c) 2015 Jiri Pirko <jiri@mellanox.com> 5 * Copyright (c) 2015 Ido Schimmel <idosch@mellanox.com> 6 * Copyright (c) 2015 Elad Raz <eladr@mellanox.com> 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the names of the copyright holders nor the names of its 17 * contributors may be used to endorse or promote products derived from 18 * this software without specific prior written permission. 19 * 20 * Alternatively, this software may be distributed under the terms of the 21 * GNU General Public License ("GPL") version 2 as published by the Free 22 * Software Foundation. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 #include <linux/kernel.h> 38 #include <linux/module.h> 39 #include <linux/device.h> 40 #include <linux/export.h> 41 #include <linux/err.h> 42 #include <linux/if_link.h> 43 #include <linux/debugfs.h> 44 #include <linux/seq_file.h> 45 #include <linux/u64_stats_sync.h> 46 #include <linux/netdevice.h> 47 #include <linux/wait.h> 48 #include <linux/skbuff.h> 49 #include <linux/etherdevice.h> 50 #include <linux/types.h> 51 #include <linux/string.h> 52 #include <linux/gfp.h> 53 #include <linux/random.h> 54 #include <linux/jiffies.h> 55 #include <linux/mutex.h> 56 #include <linux/rcupdate.h> 57 #include <linux/slab.h> 58 #include <asm/byteorder.h> 59 60 #include "core.h" 61 #include "item.h" 62 #include "cmd.h" 63 #include "port.h" 64 #include "trap.h" 65 #include "emad.h" 66 #include "reg.h" 67 68 static LIST_HEAD(mlxsw_core_driver_list); 69 static DEFINE_SPINLOCK(mlxsw_core_driver_list_lock); 70 71 static const char mlxsw_core_driver_name[] = "mlxsw_core"; 72 73 static struct dentry *mlxsw_core_dbg_root; 74 75 struct mlxsw_core_pcpu_stats { 76 u64 trap_rx_packets[MLXSW_TRAP_ID_MAX]; 77 u64 trap_rx_bytes[MLXSW_TRAP_ID_MAX]; 78 u64 port_rx_packets[MLXSW_PORT_MAX_PORTS]; 79 u64 port_rx_bytes[MLXSW_PORT_MAX_PORTS]; 80 struct u64_stats_sync syncp; 81 u32 trap_rx_dropped[MLXSW_TRAP_ID_MAX]; 82 u32 port_rx_dropped[MLXSW_PORT_MAX_PORTS]; 83 u32 trap_rx_invalid; 84 u32 port_rx_invalid; 85 }; 86 87 struct mlxsw_core { 88 struct mlxsw_driver *driver; 89 const struct mlxsw_bus *bus; 90 void *bus_priv; 91 const struct mlxsw_bus_info *bus_info; 92 struct list_head rx_listener_list; 93 struct list_head event_listener_list; 94 struct { 95 struct sk_buff *resp_skb; 96 u64 tid; 97 wait_queue_head_t wait; 98 bool trans_active; 99 struct mutex lock; /* One EMAD transaction at a time. */ 100 bool use_emad; 101 } emad; 102 struct mlxsw_core_pcpu_stats __percpu *pcpu_stats; 103 struct dentry *dbg_dir; 104 struct { 105 struct debugfs_blob_wrapper vsd_blob; 106 struct debugfs_blob_wrapper psid_blob; 107 } dbg; 108 unsigned long driver_priv[0]; 109 /* driver_priv has to be always the last item */ 110 }; 111 112 struct mlxsw_rx_listener_item { 113 struct list_head list; 114 struct mlxsw_rx_listener rxl; 115 void *priv; 116 }; 117 118 struct mlxsw_event_listener_item { 119 struct list_head list; 120 struct mlxsw_event_listener el; 121 void *priv; 122 }; 123 124 /****************** 125 * EMAD processing 126 ******************/ 127 128 /* emad_eth_hdr_dmac 129 * Destination MAC in EMAD's Ethernet header. 130 * Must be set to 01:02:c9:00:00:01 131 */ 132 MLXSW_ITEM_BUF(emad, eth_hdr, dmac, 0x00, 6); 133 134 /* emad_eth_hdr_smac 135 * Source MAC in EMAD's Ethernet header. 136 * Must be set to 00:02:c9:01:02:03 137 */ 138 MLXSW_ITEM_BUF(emad, eth_hdr, smac, 0x06, 6); 139 140 /* emad_eth_hdr_ethertype 141 * Ethertype in EMAD's Ethernet header. 142 * Must be set to 0x8932 143 */ 144 MLXSW_ITEM32(emad, eth_hdr, ethertype, 0x0C, 16, 16); 145 146 /* emad_eth_hdr_mlx_proto 147 * Mellanox protocol. 148 * Must be set to 0x0. 149 */ 150 MLXSW_ITEM32(emad, eth_hdr, mlx_proto, 0x0C, 8, 8); 151 152 /* emad_eth_hdr_ver 153 * Mellanox protocol version. 154 * Must be set to 0x0. 155 */ 156 MLXSW_ITEM32(emad, eth_hdr, ver, 0x0C, 4, 4); 157 158 /* emad_op_tlv_type 159 * Type of the TLV. 160 * Must be set to 0x1 (operation TLV). 161 */ 162 MLXSW_ITEM32(emad, op_tlv, type, 0x00, 27, 5); 163 164 /* emad_op_tlv_len 165 * Length of the operation TLV in u32. 166 * Must be set to 0x4. 167 */ 168 MLXSW_ITEM32(emad, op_tlv, len, 0x00, 16, 11); 169 170 /* emad_op_tlv_dr 171 * Direct route bit. Setting to 1 indicates the EMAD is a direct route 172 * EMAD. DR TLV must follow. 173 * 174 * Note: Currently not supported and must not be set. 175 */ 176 MLXSW_ITEM32(emad, op_tlv, dr, 0x00, 15, 1); 177 178 /* emad_op_tlv_status 179 * Returned status in case of EMAD response. Must be set to 0 in case 180 * of EMAD request. 181 * 0x0 - success 182 * 0x1 - device is busy. Requester should retry 183 * 0x2 - Mellanox protocol version not supported 184 * 0x3 - unknown TLV 185 * 0x4 - register not supported 186 * 0x5 - operation class not supported 187 * 0x6 - EMAD method not supported 188 * 0x7 - bad parameter (e.g. port out of range) 189 * 0x8 - resource not available 190 * 0x9 - message receipt acknowledgment. Requester should retry 191 * 0x70 - internal error 192 */ 193 MLXSW_ITEM32(emad, op_tlv, status, 0x00, 8, 7); 194 195 /* emad_op_tlv_register_id 196 * Register ID of register within register TLV. 197 */ 198 MLXSW_ITEM32(emad, op_tlv, register_id, 0x04, 16, 16); 199 200 /* emad_op_tlv_r 201 * Response bit. Setting to 1 indicates Response, otherwise request. 202 */ 203 MLXSW_ITEM32(emad, op_tlv, r, 0x04, 15, 1); 204 205 /* emad_op_tlv_method 206 * EMAD method type. 207 * 0x1 - query 208 * 0x2 - write 209 * 0x3 - send (currently not supported) 210 * 0x4 - event 211 */ 212 MLXSW_ITEM32(emad, op_tlv, method, 0x04, 8, 7); 213 214 /* emad_op_tlv_class 215 * EMAD operation class. Must be set to 0x1 (REG_ACCESS). 216 */ 217 MLXSW_ITEM32(emad, op_tlv, class, 0x04, 0, 8); 218 219 /* emad_op_tlv_tid 220 * EMAD transaction ID. Used for pairing request and response EMADs. 221 */ 222 MLXSW_ITEM64(emad, op_tlv, tid, 0x08, 0, 64); 223 224 /* emad_reg_tlv_type 225 * Type of the TLV. 226 * Must be set to 0x3 (register TLV). 227 */ 228 MLXSW_ITEM32(emad, reg_tlv, type, 0x00, 27, 5); 229 230 /* emad_reg_tlv_len 231 * Length of the operation TLV in u32. 232 */ 233 MLXSW_ITEM32(emad, reg_tlv, len, 0x00, 16, 11); 234 235 /* emad_end_tlv_type 236 * Type of the TLV. 237 * Must be set to 0x0 (end TLV). 238 */ 239 MLXSW_ITEM32(emad, end_tlv, type, 0x00, 27, 5); 240 241 /* emad_end_tlv_len 242 * Length of the end TLV in u32. 243 * Must be set to 1. 244 */ 245 MLXSW_ITEM32(emad, end_tlv, len, 0x00, 16, 11); 246 247 enum mlxsw_core_reg_access_type { 248 MLXSW_CORE_REG_ACCESS_TYPE_QUERY, 249 MLXSW_CORE_REG_ACCESS_TYPE_WRITE, 250 }; 251 252 static inline const char * 253 mlxsw_core_reg_access_type_str(enum mlxsw_core_reg_access_type type) 254 { 255 switch (type) { 256 case MLXSW_CORE_REG_ACCESS_TYPE_QUERY: 257 return "query"; 258 case MLXSW_CORE_REG_ACCESS_TYPE_WRITE: 259 return "write"; 260 } 261 BUG(); 262 } 263 264 static void mlxsw_emad_pack_end_tlv(char *end_tlv) 265 { 266 mlxsw_emad_end_tlv_type_set(end_tlv, MLXSW_EMAD_TLV_TYPE_END); 267 mlxsw_emad_end_tlv_len_set(end_tlv, MLXSW_EMAD_END_TLV_LEN); 268 } 269 270 static void mlxsw_emad_pack_reg_tlv(char *reg_tlv, 271 const struct mlxsw_reg_info *reg, 272 char *payload) 273 { 274 mlxsw_emad_reg_tlv_type_set(reg_tlv, MLXSW_EMAD_TLV_TYPE_REG); 275 mlxsw_emad_reg_tlv_len_set(reg_tlv, reg->len / sizeof(u32) + 1); 276 memcpy(reg_tlv + sizeof(u32), payload, reg->len); 277 } 278 279 static void mlxsw_emad_pack_op_tlv(char *op_tlv, 280 const struct mlxsw_reg_info *reg, 281 enum mlxsw_core_reg_access_type type, 282 struct mlxsw_core *mlxsw_core) 283 { 284 mlxsw_emad_op_tlv_type_set(op_tlv, MLXSW_EMAD_TLV_TYPE_OP); 285 mlxsw_emad_op_tlv_len_set(op_tlv, MLXSW_EMAD_OP_TLV_LEN); 286 mlxsw_emad_op_tlv_dr_set(op_tlv, 0); 287 mlxsw_emad_op_tlv_status_set(op_tlv, 0); 288 mlxsw_emad_op_tlv_register_id_set(op_tlv, reg->id); 289 mlxsw_emad_op_tlv_r_set(op_tlv, MLXSW_EMAD_OP_TLV_REQUEST); 290 if (type == MLXSW_CORE_REG_ACCESS_TYPE_QUERY) 291 mlxsw_emad_op_tlv_method_set(op_tlv, 292 MLXSW_EMAD_OP_TLV_METHOD_QUERY); 293 else 294 mlxsw_emad_op_tlv_method_set(op_tlv, 295 MLXSW_EMAD_OP_TLV_METHOD_WRITE); 296 mlxsw_emad_op_tlv_class_set(op_tlv, 297 MLXSW_EMAD_OP_TLV_CLASS_REG_ACCESS); 298 mlxsw_emad_op_tlv_tid_set(op_tlv, mlxsw_core->emad.tid); 299 } 300 301 static int mlxsw_emad_construct_eth_hdr(struct sk_buff *skb) 302 { 303 char *eth_hdr = skb_push(skb, MLXSW_EMAD_ETH_HDR_LEN); 304 305 mlxsw_emad_eth_hdr_dmac_memcpy_to(eth_hdr, MLXSW_EMAD_EH_DMAC); 306 mlxsw_emad_eth_hdr_smac_memcpy_to(eth_hdr, MLXSW_EMAD_EH_SMAC); 307 mlxsw_emad_eth_hdr_ethertype_set(eth_hdr, MLXSW_EMAD_EH_ETHERTYPE); 308 mlxsw_emad_eth_hdr_mlx_proto_set(eth_hdr, MLXSW_EMAD_EH_MLX_PROTO); 309 mlxsw_emad_eth_hdr_ver_set(eth_hdr, MLXSW_EMAD_EH_PROTO_VERSION); 310 311 skb_reset_mac_header(skb); 312 313 return 0; 314 } 315 316 static void mlxsw_emad_construct(struct sk_buff *skb, 317 const struct mlxsw_reg_info *reg, 318 char *payload, 319 enum mlxsw_core_reg_access_type type, 320 struct mlxsw_core *mlxsw_core) 321 { 322 char *buf; 323 324 buf = skb_push(skb, MLXSW_EMAD_END_TLV_LEN * sizeof(u32)); 325 mlxsw_emad_pack_end_tlv(buf); 326 327 buf = skb_push(skb, reg->len + sizeof(u32)); 328 mlxsw_emad_pack_reg_tlv(buf, reg, payload); 329 330 buf = skb_push(skb, MLXSW_EMAD_OP_TLV_LEN * sizeof(u32)); 331 mlxsw_emad_pack_op_tlv(buf, reg, type, mlxsw_core); 332 333 mlxsw_emad_construct_eth_hdr(skb); 334 } 335 336 static char *mlxsw_emad_op_tlv(const struct sk_buff *skb) 337 { 338 return ((char *) (skb->data + MLXSW_EMAD_ETH_HDR_LEN)); 339 } 340 341 static char *mlxsw_emad_reg_tlv(const struct sk_buff *skb) 342 { 343 return ((char *) (skb->data + MLXSW_EMAD_ETH_HDR_LEN + 344 MLXSW_EMAD_OP_TLV_LEN * sizeof(u32))); 345 } 346 347 static char *mlxsw_emad_reg_payload(const char *op_tlv) 348 { 349 return ((char *) (op_tlv + (MLXSW_EMAD_OP_TLV_LEN + 1) * sizeof(u32))); 350 } 351 352 static u64 mlxsw_emad_get_tid(const struct sk_buff *skb) 353 { 354 char *op_tlv; 355 356 op_tlv = mlxsw_emad_op_tlv(skb); 357 return mlxsw_emad_op_tlv_tid_get(op_tlv); 358 } 359 360 static bool mlxsw_emad_is_resp(const struct sk_buff *skb) 361 { 362 char *op_tlv; 363 364 op_tlv = mlxsw_emad_op_tlv(skb); 365 return (mlxsw_emad_op_tlv_r_get(op_tlv) == MLXSW_EMAD_OP_TLV_RESPONSE); 366 } 367 368 #define MLXSW_EMAD_TIMEOUT_MS 200 369 370 static int __mlxsw_emad_transmit(struct mlxsw_core *mlxsw_core, 371 struct sk_buff *skb, 372 const struct mlxsw_tx_info *tx_info) 373 { 374 int err; 375 int ret; 376 377 mlxsw_core->emad.trans_active = true; 378 379 err = mlxsw_core_skb_transmit(mlxsw_core->driver_priv, skb, tx_info); 380 if (err) { 381 dev_err(mlxsw_core->bus_info->dev, "Failed to transmit EMAD (tid=%llx)\n", 382 mlxsw_core->emad.tid); 383 dev_kfree_skb(skb); 384 goto trans_inactive_out; 385 } 386 387 ret = wait_event_timeout(mlxsw_core->emad.wait, 388 !(mlxsw_core->emad.trans_active), 389 msecs_to_jiffies(MLXSW_EMAD_TIMEOUT_MS)); 390 if (!ret) { 391 dev_warn(mlxsw_core->bus_info->dev, "EMAD timed-out (tid=%llx)\n", 392 mlxsw_core->emad.tid); 393 err = -EIO; 394 goto trans_inactive_out; 395 } 396 397 return 0; 398 399 trans_inactive_out: 400 mlxsw_core->emad.trans_active = false; 401 return err; 402 } 403 404 static int mlxsw_emad_process_status(struct mlxsw_core *mlxsw_core, 405 char *op_tlv) 406 { 407 enum mlxsw_emad_op_tlv_status status; 408 u64 tid; 409 410 status = mlxsw_emad_op_tlv_status_get(op_tlv); 411 tid = mlxsw_emad_op_tlv_tid_get(op_tlv); 412 413 switch (status) { 414 case MLXSW_EMAD_OP_TLV_STATUS_SUCCESS: 415 return 0; 416 case MLXSW_EMAD_OP_TLV_STATUS_BUSY: 417 case MLXSW_EMAD_OP_TLV_STATUS_MESSAGE_RECEIPT_ACK: 418 dev_warn(mlxsw_core->bus_info->dev, "Reg access status again (tid=%llx,status=%x(%s))\n", 419 tid, status, mlxsw_emad_op_tlv_status_str(status)); 420 return -EAGAIN; 421 case MLXSW_EMAD_OP_TLV_STATUS_VERSION_NOT_SUPPORTED: 422 case MLXSW_EMAD_OP_TLV_STATUS_UNKNOWN_TLV: 423 case MLXSW_EMAD_OP_TLV_STATUS_REGISTER_NOT_SUPPORTED: 424 case MLXSW_EMAD_OP_TLV_STATUS_CLASS_NOT_SUPPORTED: 425 case MLXSW_EMAD_OP_TLV_STATUS_METHOD_NOT_SUPPORTED: 426 case MLXSW_EMAD_OP_TLV_STATUS_BAD_PARAMETER: 427 case MLXSW_EMAD_OP_TLV_STATUS_RESOURCE_NOT_AVAILABLE: 428 case MLXSW_EMAD_OP_TLV_STATUS_INTERNAL_ERROR: 429 default: 430 dev_err(mlxsw_core->bus_info->dev, "Reg access status failed (tid=%llx,status=%x(%s))\n", 431 tid, status, mlxsw_emad_op_tlv_status_str(status)); 432 return -EIO; 433 } 434 } 435 436 static int mlxsw_emad_process_status_skb(struct mlxsw_core *mlxsw_core, 437 struct sk_buff *skb) 438 { 439 return mlxsw_emad_process_status(mlxsw_core, mlxsw_emad_op_tlv(skb)); 440 } 441 442 static int mlxsw_emad_transmit(struct mlxsw_core *mlxsw_core, 443 struct sk_buff *skb, 444 const struct mlxsw_tx_info *tx_info) 445 { 446 struct sk_buff *trans_skb; 447 int n_retry; 448 int err; 449 450 n_retry = 0; 451 retry: 452 /* We copy the EMAD to a new skb, since we might need 453 * to retransmit it in case of failure. 454 */ 455 trans_skb = skb_copy(skb, GFP_KERNEL); 456 if (!trans_skb) { 457 err = -ENOMEM; 458 goto out; 459 } 460 461 err = __mlxsw_emad_transmit(mlxsw_core, trans_skb, tx_info); 462 if (!err) { 463 struct sk_buff *resp_skb = mlxsw_core->emad.resp_skb; 464 465 err = mlxsw_emad_process_status_skb(mlxsw_core, resp_skb); 466 if (err) 467 dev_kfree_skb(resp_skb); 468 if (!err || err != -EAGAIN) 469 goto out; 470 } 471 if (n_retry++ < MLXSW_EMAD_MAX_RETRY) 472 goto retry; 473 474 out: 475 dev_kfree_skb(skb); 476 mlxsw_core->emad.tid++; 477 return err; 478 } 479 480 static void mlxsw_emad_rx_listener_func(struct sk_buff *skb, u8 local_port, 481 void *priv) 482 { 483 struct mlxsw_core *mlxsw_core = priv; 484 485 if (mlxsw_emad_is_resp(skb) && 486 mlxsw_core->emad.trans_active && 487 mlxsw_emad_get_tid(skb) == mlxsw_core->emad.tid) { 488 mlxsw_core->emad.resp_skb = skb; 489 mlxsw_core->emad.trans_active = false; 490 wake_up(&mlxsw_core->emad.wait); 491 } else { 492 dev_kfree_skb(skb); 493 } 494 } 495 496 static const struct mlxsw_rx_listener mlxsw_emad_rx_listener = { 497 .func = mlxsw_emad_rx_listener_func, 498 .local_port = MLXSW_PORT_DONT_CARE, 499 .trap_id = MLXSW_TRAP_ID_ETHEMAD, 500 }; 501 502 static int mlxsw_emad_traps_set(struct mlxsw_core *mlxsw_core) 503 { 504 char htgt_pl[MLXSW_REG_HTGT_LEN]; 505 char hpkt_pl[MLXSW_REG_HPKT_LEN]; 506 int err; 507 508 mlxsw_reg_htgt_pack(htgt_pl, MLXSW_REG_HTGT_TRAP_GROUP_EMAD); 509 err = mlxsw_reg_write(mlxsw_core, MLXSW_REG(htgt), htgt_pl); 510 if (err) 511 return err; 512 513 mlxsw_reg_hpkt_pack(hpkt_pl, MLXSW_REG_HPKT_ACTION_TRAP_TO_CPU, 514 MLXSW_TRAP_ID_ETHEMAD); 515 return mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl); 516 } 517 518 static int mlxsw_emad_init(struct mlxsw_core *mlxsw_core) 519 { 520 int err; 521 522 /* Set the upper 32 bits of the transaction ID field to a random 523 * number. This allows us to discard EMADs addressed to other 524 * devices. 525 */ 526 get_random_bytes(&mlxsw_core->emad.tid, 4); 527 mlxsw_core->emad.tid = mlxsw_core->emad.tid << 32; 528 529 init_waitqueue_head(&mlxsw_core->emad.wait); 530 mlxsw_core->emad.trans_active = false; 531 mutex_init(&mlxsw_core->emad.lock); 532 533 err = mlxsw_core_rx_listener_register(mlxsw_core, 534 &mlxsw_emad_rx_listener, 535 mlxsw_core); 536 if (err) 537 return err; 538 539 err = mlxsw_emad_traps_set(mlxsw_core); 540 if (err) 541 goto err_emad_trap_set; 542 543 mlxsw_core->emad.use_emad = true; 544 545 return 0; 546 547 err_emad_trap_set: 548 mlxsw_core_rx_listener_unregister(mlxsw_core, 549 &mlxsw_emad_rx_listener, 550 mlxsw_core); 551 return err; 552 } 553 554 static void mlxsw_emad_fini(struct mlxsw_core *mlxsw_core) 555 { 556 char hpkt_pl[MLXSW_REG_HPKT_LEN]; 557 558 mlxsw_core->emad.use_emad = false; 559 mlxsw_reg_hpkt_pack(hpkt_pl, MLXSW_REG_HPKT_ACTION_DISCARD, 560 MLXSW_TRAP_ID_ETHEMAD); 561 mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl); 562 563 mlxsw_core_rx_listener_unregister(mlxsw_core, 564 &mlxsw_emad_rx_listener, 565 mlxsw_core); 566 } 567 568 static struct sk_buff *mlxsw_emad_alloc(const struct mlxsw_core *mlxsw_core, 569 u16 reg_len) 570 { 571 struct sk_buff *skb; 572 u16 emad_len; 573 574 emad_len = (reg_len + sizeof(u32) + MLXSW_EMAD_ETH_HDR_LEN + 575 (MLXSW_EMAD_OP_TLV_LEN + MLXSW_EMAD_END_TLV_LEN) * 576 sizeof(u32) + mlxsw_core->driver->txhdr_len); 577 if (emad_len > MLXSW_EMAD_MAX_FRAME_LEN) 578 return NULL; 579 580 skb = netdev_alloc_skb(NULL, emad_len); 581 if (!skb) 582 return NULL; 583 memset(skb->data, 0, emad_len); 584 skb_reserve(skb, emad_len); 585 586 return skb; 587 } 588 589 /***************** 590 * Core functions 591 *****************/ 592 593 static int mlxsw_core_rx_stats_dbg_read(struct seq_file *file, void *data) 594 { 595 struct mlxsw_core *mlxsw_core = file->private; 596 struct mlxsw_core_pcpu_stats *p; 597 u64 rx_packets, rx_bytes; 598 u64 tmp_rx_packets, tmp_rx_bytes; 599 u32 rx_dropped, rx_invalid; 600 unsigned int start; 601 int i; 602 int j; 603 static const char hdr[] = 604 " NUM RX_PACKETS RX_BYTES RX_DROPPED\n"; 605 606 seq_printf(file, hdr); 607 for (i = 0; i < MLXSW_TRAP_ID_MAX; i++) { 608 rx_packets = 0; 609 rx_bytes = 0; 610 rx_dropped = 0; 611 for_each_possible_cpu(j) { 612 p = per_cpu_ptr(mlxsw_core->pcpu_stats, j); 613 do { 614 start = u64_stats_fetch_begin(&p->syncp); 615 tmp_rx_packets = p->trap_rx_packets[i]; 616 tmp_rx_bytes = p->trap_rx_bytes[i]; 617 } while (u64_stats_fetch_retry(&p->syncp, start)); 618 619 rx_packets += tmp_rx_packets; 620 rx_bytes += tmp_rx_bytes; 621 rx_dropped += p->trap_rx_dropped[i]; 622 } 623 seq_printf(file, "trap %3d %12llu %12llu %10u\n", 624 i, rx_packets, rx_bytes, rx_dropped); 625 } 626 rx_invalid = 0; 627 for_each_possible_cpu(j) { 628 p = per_cpu_ptr(mlxsw_core->pcpu_stats, j); 629 rx_invalid += p->trap_rx_invalid; 630 } 631 seq_printf(file, "trap INV %10u\n", 632 rx_invalid); 633 634 for (i = 0; i < MLXSW_PORT_MAX_PORTS; i++) { 635 rx_packets = 0; 636 rx_bytes = 0; 637 rx_dropped = 0; 638 for_each_possible_cpu(j) { 639 p = per_cpu_ptr(mlxsw_core->pcpu_stats, j); 640 do { 641 start = u64_stats_fetch_begin(&p->syncp); 642 tmp_rx_packets = p->port_rx_packets[i]; 643 tmp_rx_bytes = p->port_rx_bytes[i]; 644 } while (u64_stats_fetch_retry(&p->syncp, start)); 645 646 rx_packets += tmp_rx_packets; 647 rx_bytes += tmp_rx_bytes; 648 rx_dropped += p->port_rx_dropped[i]; 649 } 650 seq_printf(file, "port %3d %12llu %12llu %10u\n", 651 i, rx_packets, rx_bytes, rx_dropped); 652 } 653 rx_invalid = 0; 654 for_each_possible_cpu(j) { 655 p = per_cpu_ptr(mlxsw_core->pcpu_stats, j); 656 rx_invalid += p->port_rx_invalid; 657 } 658 seq_printf(file, "port INV %10u\n", 659 rx_invalid); 660 return 0; 661 } 662 663 static int mlxsw_core_rx_stats_dbg_open(struct inode *inode, struct file *f) 664 { 665 struct mlxsw_core *mlxsw_core = inode->i_private; 666 667 return single_open(f, mlxsw_core_rx_stats_dbg_read, mlxsw_core); 668 } 669 670 static const struct file_operations mlxsw_core_rx_stats_dbg_ops = { 671 .owner = THIS_MODULE, 672 .open = mlxsw_core_rx_stats_dbg_open, 673 .release = single_release, 674 .read = seq_read, 675 .llseek = seq_lseek 676 }; 677 678 static void mlxsw_core_buf_dump_dbg(struct mlxsw_core *mlxsw_core, 679 const char *buf, size_t size) 680 { 681 __be32 *m = (__be32 *) buf; 682 int i; 683 int count = size / sizeof(__be32); 684 685 for (i = count - 1; i >= 0; i--) 686 if (m[i]) 687 break; 688 i++; 689 count = i ? i : 1; 690 for (i = 0; i < count; i += 4) 691 dev_dbg(mlxsw_core->bus_info->dev, "%04x - %08x %08x %08x %08x\n", 692 i * 4, be32_to_cpu(m[i]), be32_to_cpu(m[i + 1]), 693 be32_to_cpu(m[i + 2]), be32_to_cpu(m[i + 3])); 694 } 695 696 int 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 } 703 EXPORT_SYMBOL(mlxsw_core_driver_register); 704 705 void 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 } 711 EXPORT_SYMBOL(mlxsw_core_driver_unregister); 712 713 static 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 } 723 724 static 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 if (!mlxsw_driver) { 731 spin_unlock(&mlxsw_core_driver_list_lock); 732 request_module(MLXSW_MODULE_ALIAS_PREFIX "%s", kind); 733 spin_lock(&mlxsw_core_driver_list_lock); 734 mlxsw_driver = __driver_find(kind); 735 } 736 if (mlxsw_driver) { 737 if (!try_module_get(mlxsw_driver->owner)) 738 mlxsw_driver = NULL; 739 } 740 741 spin_unlock(&mlxsw_core_driver_list_lock); 742 return mlxsw_driver; 743 } 744 745 static void mlxsw_core_driver_put(const char *kind) 746 { 747 struct mlxsw_driver *mlxsw_driver; 748 749 spin_lock(&mlxsw_core_driver_list_lock); 750 mlxsw_driver = __driver_find(kind); 751 spin_unlock(&mlxsw_core_driver_list_lock); 752 if (!mlxsw_driver) 753 return; 754 module_put(mlxsw_driver->owner); 755 } 756 757 static int mlxsw_core_debugfs_init(struct mlxsw_core *mlxsw_core) 758 { 759 const struct mlxsw_bus_info *bus_info = mlxsw_core->bus_info; 760 761 mlxsw_core->dbg_dir = debugfs_create_dir(bus_info->device_name, 762 mlxsw_core_dbg_root); 763 if (!mlxsw_core->dbg_dir) 764 return -ENOMEM; 765 debugfs_create_file("rx_stats", S_IRUGO, mlxsw_core->dbg_dir, 766 mlxsw_core, &mlxsw_core_rx_stats_dbg_ops); 767 mlxsw_core->dbg.vsd_blob.data = (void *) &bus_info->vsd; 768 mlxsw_core->dbg.vsd_blob.size = sizeof(bus_info->vsd); 769 debugfs_create_blob("vsd", S_IRUGO, mlxsw_core->dbg_dir, 770 &mlxsw_core->dbg.vsd_blob); 771 mlxsw_core->dbg.psid_blob.data = (void *) &bus_info->psid; 772 mlxsw_core->dbg.psid_blob.size = sizeof(bus_info->psid); 773 debugfs_create_blob("psid", S_IRUGO, mlxsw_core->dbg_dir, 774 &mlxsw_core->dbg.psid_blob); 775 return 0; 776 } 777 778 static void mlxsw_core_debugfs_fini(struct mlxsw_core *mlxsw_core) 779 { 780 debugfs_remove_recursive(mlxsw_core->dbg_dir); 781 } 782 783 int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info, 784 const struct mlxsw_bus *mlxsw_bus, 785 void *bus_priv) 786 { 787 const char *device_kind = mlxsw_bus_info->device_kind; 788 struct mlxsw_core *mlxsw_core; 789 struct mlxsw_driver *mlxsw_driver; 790 size_t alloc_size; 791 int err; 792 793 mlxsw_driver = mlxsw_core_driver_get(device_kind); 794 if (!mlxsw_driver) 795 return -EINVAL; 796 alloc_size = sizeof(*mlxsw_core) + mlxsw_driver->priv_size; 797 mlxsw_core = kzalloc(alloc_size, GFP_KERNEL); 798 if (!mlxsw_core) { 799 err = -ENOMEM; 800 goto err_core_alloc; 801 } 802 803 INIT_LIST_HEAD(&mlxsw_core->rx_listener_list); 804 INIT_LIST_HEAD(&mlxsw_core->event_listener_list); 805 mlxsw_core->driver = mlxsw_driver; 806 mlxsw_core->bus = mlxsw_bus; 807 mlxsw_core->bus_priv = bus_priv; 808 mlxsw_core->bus_info = mlxsw_bus_info; 809 810 mlxsw_core->pcpu_stats = 811 netdev_alloc_pcpu_stats(struct mlxsw_core_pcpu_stats); 812 if (!mlxsw_core->pcpu_stats) { 813 err = -ENOMEM; 814 goto err_alloc_stats; 815 } 816 817 err = mlxsw_bus->init(bus_priv, mlxsw_core, mlxsw_driver->profile); 818 if (err) 819 goto err_bus_init; 820 821 err = mlxsw_emad_init(mlxsw_core); 822 if (err) 823 goto err_emad_init; 824 825 err = mlxsw_driver->init(mlxsw_core->driver_priv, mlxsw_core, 826 mlxsw_bus_info); 827 if (err) 828 goto err_driver_init; 829 830 err = mlxsw_core_debugfs_init(mlxsw_core); 831 if (err) 832 goto err_debugfs_init; 833 834 return 0; 835 836 err_debugfs_init: 837 mlxsw_core->driver->fini(mlxsw_core->driver_priv); 838 err_driver_init: 839 mlxsw_emad_fini(mlxsw_core); 840 err_emad_init: 841 mlxsw_bus->fini(bus_priv); 842 err_bus_init: 843 free_percpu(mlxsw_core->pcpu_stats); 844 err_alloc_stats: 845 kfree(mlxsw_core); 846 err_core_alloc: 847 mlxsw_core_driver_put(device_kind); 848 return err; 849 } 850 EXPORT_SYMBOL(mlxsw_core_bus_device_register); 851 852 void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core) 853 { 854 const char *device_kind = mlxsw_core->bus_info->device_kind; 855 856 mlxsw_core_debugfs_fini(mlxsw_core); 857 mlxsw_core->driver->fini(mlxsw_core->driver_priv); 858 mlxsw_emad_fini(mlxsw_core); 859 mlxsw_core->bus->fini(mlxsw_core->bus_priv); 860 free_percpu(mlxsw_core->pcpu_stats); 861 kfree(mlxsw_core); 862 mlxsw_core_driver_put(device_kind); 863 } 864 EXPORT_SYMBOL(mlxsw_core_bus_device_unregister); 865 866 static struct mlxsw_core *__mlxsw_core_get(void *driver_priv) 867 { 868 return container_of(driver_priv, struct mlxsw_core, driver_priv); 869 } 870 871 bool mlxsw_core_skb_transmit_busy(void *driver_priv, 872 const struct mlxsw_tx_info *tx_info) 873 { 874 struct mlxsw_core *mlxsw_core = __mlxsw_core_get(driver_priv); 875 876 return mlxsw_core->bus->skb_transmit_busy(mlxsw_core->bus_priv, 877 tx_info); 878 } 879 EXPORT_SYMBOL(mlxsw_core_skb_transmit_busy); 880 881 int mlxsw_core_skb_transmit(void *driver_priv, struct sk_buff *skb, 882 const struct mlxsw_tx_info *tx_info) 883 { 884 struct mlxsw_core *mlxsw_core = __mlxsw_core_get(driver_priv); 885 886 return mlxsw_core->bus->skb_transmit(mlxsw_core->bus_priv, skb, 887 tx_info); 888 } 889 EXPORT_SYMBOL(mlxsw_core_skb_transmit); 890 891 static bool __is_rx_listener_equal(const struct mlxsw_rx_listener *rxl_a, 892 const struct mlxsw_rx_listener *rxl_b) 893 { 894 return (rxl_a->func == rxl_b->func && 895 rxl_a->local_port == rxl_b->local_port && 896 rxl_a->trap_id == rxl_b->trap_id); 897 } 898 899 static struct mlxsw_rx_listener_item * 900 __find_rx_listener_item(struct mlxsw_core *mlxsw_core, 901 const struct mlxsw_rx_listener *rxl, 902 void *priv) 903 { 904 struct mlxsw_rx_listener_item *rxl_item; 905 906 list_for_each_entry(rxl_item, &mlxsw_core->rx_listener_list, list) { 907 if (__is_rx_listener_equal(&rxl_item->rxl, rxl) && 908 rxl_item->priv == priv) 909 return rxl_item; 910 } 911 return NULL; 912 } 913 914 int mlxsw_core_rx_listener_register(struct mlxsw_core *mlxsw_core, 915 const struct mlxsw_rx_listener *rxl, 916 void *priv) 917 { 918 struct mlxsw_rx_listener_item *rxl_item; 919 920 rxl_item = __find_rx_listener_item(mlxsw_core, rxl, priv); 921 if (rxl_item) 922 return -EEXIST; 923 rxl_item = kmalloc(sizeof(*rxl_item), GFP_KERNEL); 924 if (!rxl_item) 925 return -ENOMEM; 926 rxl_item->rxl = *rxl; 927 rxl_item->priv = priv; 928 929 list_add_rcu(&rxl_item->list, &mlxsw_core->rx_listener_list); 930 return 0; 931 } 932 EXPORT_SYMBOL(mlxsw_core_rx_listener_register); 933 934 void mlxsw_core_rx_listener_unregister(struct mlxsw_core *mlxsw_core, 935 const struct mlxsw_rx_listener *rxl, 936 void *priv) 937 { 938 struct mlxsw_rx_listener_item *rxl_item; 939 940 rxl_item = __find_rx_listener_item(mlxsw_core, rxl, priv); 941 if (!rxl_item) 942 return; 943 list_del_rcu(&rxl_item->list); 944 synchronize_rcu(); 945 kfree(rxl_item); 946 } 947 EXPORT_SYMBOL(mlxsw_core_rx_listener_unregister); 948 949 static void mlxsw_core_event_listener_func(struct sk_buff *skb, u8 local_port, 950 void *priv) 951 { 952 struct mlxsw_event_listener_item *event_listener_item = priv; 953 struct mlxsw_reg_info reg; 954 char *payload; 955 char *op_tlv = mlxsw_emad_op_tlv(skb); 956 char *reg_tlv = mlxsw_emad_reg_tlv(skb); 957 958 reg.id = mlxsw_emad_op_tlv_register_id_get(op_tlv); 959 reg.len = (mlxsw_emad_reg_tlv_len_get(reg_tlv) - 1) * sizeof(u32); 960 payload = mlxsw_emad_reg_payload(op_tlv); 961 event_listener_item->el.func(®, payload, event_listener_item->priv); 962 dev_kfree_skb(skb); 963 } 964 965 static bool __is_event_listener_equal(const struct mlxsw_event_listener *el_a, 966 const struct mlxsw_event_listener *el_b) 967 { 968 return (el_a->func == el_b->func && 969 el_a->trap_id == el_b->trap_id); 970 } 971 972 static struct mlxsw_event_listener_item * 973 __find_event_listener_item(struct mlxsw_core *mlxsw_core, 974 const struct mlxsw_event_listener *el, 975 void *priv) 976 { 977 struct mlxsw_event_listener_item *el_item; 978 979 list_for_each_entry(el_item, &mlxsw_core->event_listener_list, list) { 980 if (__is_event_listener_equal(&el_item->el, el) && 981 el_item->priv == priv) 982 return el_item; 983 } 984 return NULL; 985 } 986 987 int mlxsw_core_event_listener_register(struct mlxsw_core *mlxsw_core, 988 const struct mlxsw_event_listener *el, 989 void *priv) 990 { 991 int err; 992 struct mlxsw_event_listener_item *el_item; 993 const struct mlxsw_rx_listener rxl = { 994 .func = mlxsw_core_event_listener_func, 995 .local_port = MLXSW_PORT_DONT_CARE, 996 .trap_id = el->trap_id, 997 }; 998 999 el_item = __find_event_listener_item(mlxsw_core, el, priv); 1000 if (el_item) 1001 return -EEXIST; 1002 el_item = kmalloc(sizeof(*el_item), GFP_KERNEL); 1003 if (!el_item) 1004 return -ENOMEM; 1005 el_item->el = *el; 1006 el_item->priv = priv; 1007 1008 err = mlxsw_core_rx_listener_register(mlxsw_core, &rxl, el_item); 1009 if (err) 1010 goto err_rx_listener_register; 1011 1012 /* No reason to save item if we did not manage to register an RX 1013 * listener for it. 1014 */ 1015 list_add_rcu(&el_item->list, &mlxsw_core->event_listener_list); 1016 1017 return 0; 1018 1019 err_rx_listener_register: 1020 kfree(el_item); 1021 return err; 1022 } 1023 EXPORT_SYMBOL(mlxsw_core_event_listener_register); 1024 1025 void mlxsw_core_event_listener_unregister(struct mlxsw_core *mlxsw_core, 1026 const struct mlxsw_event_listener *el, 1027 void *priv) 1028 { 1029 struct mlxsw_event_listener_item *el_item; 1030 const struct mlxsw_rx_listener rxl = { 1031 .func = mlxsw_core_event_listener_func, 1032 .local_port = MLXSW_PORT_DONT_CARE, 1033 .trap_id = el->trap_id, 1034 }; 1035 1036 el_item = __find_event_listener_item(mlxsw_core, el, priv); 1037 if (!el_item) 1038 return; 1039 mlxsw_core_rx_listener_unregister(mlxsw_core, &rxl, el_item); 1040 list_del(&el_item->list); 1041 kfree(el_item); 1042 } 1043 EXPORT_SYMBOL(mlxsw_core_event_listener_unregister); 1044 1045 static int mlxsw_core_reg_access_emad(struct mlxsw_core *mlxsw_core, 1046 const struct mlxsw_reg_info *reg, 1047 char *payload, 1048 enum mlxsw_core_reg_access_type type) 1049 { 1050 int err; 1051 char *op_tlv; 1052 struct sk_buff *skb; 1053 struct mlxsw_tx_info tx_info = { 1054 .local_port = MLXSW_PORT_CPU_PORT, 1055 .is_emad = true, 1056 }; 1057 1058 skb = mlxsw_emad_alloc(mlxsw_core, reg->len); 1059 if (!skb) 1060 return -ENOMEM; 1061 1062 mlxsw_emad_construct(skb, reg, payload, type, mlxsw_core); 1063 mlxsw_core->driver->txhdr_construct(skb, &tx_info); 1064 1065 dev_dbg(mlxsw_core->bus_info->dev, "EMAD send (tid=%llx)\n", 1066 mlxsw_core->emad.tid); 1067 mlxsw_core_buf_dump_dbg(mlxsw_core, skb->data, skb->len); 1068 1069 err = mlxsw_emad_transmit(mlxsw_core, skb, &tx_info); 1070 if (!err) { 1071 op_tlv = mlxsw_emad_op_tlv(mlxsw_core->emad.resp_skb); 1072 memcpy(payload, mlxsw_emad_reg_payload(op_tlv), 1073 reg->len); 1074 1075 dev_dbg(mlxsw_core->bus_info->dev, "EMAD recv (tid=%llx)\n", 1076 mlxsw_core->emad.tid - 1); 1077 mlxsw_core_buf_dump_dbg(mlxsw_core, 1078 mlxsw_core->emad.resp_skb->data, 1079 mlxsw_core->emad.resp_skb->len); 1080 1081 dev_kfree_skb(mlxsw_core->emad.resp_skb); 1082 } 1083 1084 return err; 1085 } 1086 1087 static int mlxsw_core_reg_access_cmd(struct mlxsw_core *mlxsw_core, 1088 const struct mlxsw_reg_info *reg, 1089 char *payload, 1090 enum mlxsw_core_reg_access_type type) 1091 { 1092 int err, n_retry; 1093 char *in_mbox, *out_mbox, *tmp; 1094 1095 in_mbox = mlxsw_cmd_mbox_alloc(); 1096 if (!in_mbox) 1097 return -ENOMEM; 1098 1099 out_mbox = mlxsw_cmd_mbox_alloc(); 1100 if (!out_mbox) { 1101 err = -ENOMEM; 1102 goto free_in_mbox; 1103 } 1104 1105 mlxsw_emad_pack_op_tlv(in_mbox, reg, type, mlxsw_core); 1106 tmp = in_mbox + MLXSW_EMAD_OP_TLV_LEN * sizeof(u32); 1107 mlxsw_emad_pack_reg_tlv(tmp, reg, payload); 1108 1109 n_retry = 0; 1110 retry: 1111 err = mlxsw_cmd_access_reg(mlxsw_core, in_mbox, out_mbox); 1112 if (!err) { 1113 err = mlxsw_emad_process_status(mlxsw_core, out_mbox); 1114 if (err == -EAGAIN && n_retry++ < MLXSW_EMAD_MAX_RETRY) 1115 goto retry; 1116 } 1117 1118 if (!err) 1119 memcpy(payload, mlxsw_emad_reg_payload(out_mbox), 1120 reg->len); 1121 1122 mlxsw_core->emad.tid++; 1123 mlxsw_cmd_mbox_free(out_mbox); 1124 free_in_mbox: 1125 mlxsw_cmd_mbox_free(in_mbox); 1126 return err; 1127 } 1128 1129 static int mlxsw_core_reg_access(struct mlxsw_core *mlxsw_core, 1130 const struct mlxsw_reg_info *reg, 1131 char *payload, 1132 enum mlxsw_core_reg_access_type type) 1133 { 1134 u64 cur_tid; 1135 int err; 1136 1137 if (mutex_lock_interruptible(&mlxsw_core->emad.lock)) { 1138 dev_err(mlxsw_core->bus_info->dev, "Reg access interrupted (reg_id=%x(%s),type=%s)\n", 1139 reg->id, mlxsw_reg_id_str(reg->id), 1140 mlxsw_core_reg_access_type_str(type)); 1141 return -EINTR; 1142 } 1143 1144 cur_tid = mlxsw_core->emad.tid; 1145 dev_dbg(mlxsw_core->bus_info->dev, "Reg access (tid=%llx,reg_id=%x(%s),type=%s)\n", 1146 cur_tid, reg->id, mlxsw_reg_id_str(reg->id), 1147 mlxsw_core_reg_access_type_str(type)); 1148 1149 /* During initialization EMAD interface is not available to us, 1150 * so we default to command interface. We switch to EMAD interface 1151 * after setting the appropriate traps. 1152 */ 1153 if (!mlxsw_core->emad.use_emad) 1154 err = mlxsw_core_reg_access_cmd(mlxsw_core, reg, 1155 payload, type); 1156 else 1157 err = mlxsw_core_reg_access_emad(mlxsw_core, reg, 1158 payload, type); 1159 1160 if (err) 1161 dev_err(mlxsw_core->bus_info->dev, "Reg access failed (tid=%llx,reg_id=%x(%s),type=%s)\n", 1162 cur_tid, reg->id, mlxsw_reg_id_str(reg->id), 1163 mlxsw_core_reg_access_type_str(type)); 1164 1165 mutex_unlock(&mlxsw_core->emad.lock); 1166 return err; 1167 } 1168 1169 int mlxsw_reg_query(struct mlxsw_core *mlxsw_core, 1170 const struct mlxsw_reg_info *reg, char *payload) 1171 { 1172 return mlxsw_core_reg_access(mlxsw_core, reg, payload, 1173 MLXSW_CORE_REG_ACCESS_TYPE_QUERY); 1174 } 1175 EXPORT_SYMBOL(mlxsw_reg_query); 1176 1177 int mlxsw_reg_write(struct mlxsw_core *mlxsw_core, 1178 const struct mlxsw_reg_info *reg, char *payload) 1179 { 1180 return mlxsw_core_reg_access(mlxsw_core, reg, payload, 1181 MLXSW_CORE_REG_ACCESS_TYPE_WRITE); 1182 } 1183 EXPORT_SYMBOL(mlxsw_reg_write); 1184 1185 void mlxsw_core_skb_receive(struct mlxsw_core *mlxsw_core, struct sk_buff *skb, 1186 struct mlxsw_rx_info *rx_info) 1187 { 1188 struct mlxsw_rx_listener_item *rxl_item; 1189 const struct mlxsw_rx_listener *rxl; 1190 struct mlxsw_core_pcpu_stats *pcpu_stats; 1191 u8 local_port = rx_info->sys_port; 1192 bool found = false; 1193 1194 dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: sys_port = %d, trap_id = 0x%x\n", 1195 __func__, rx_info->sys_port, rx_info->trap_id); 1196 1197 if ((rx_info->trap_id >= MLXSW_TRAP_ID_MAX) || 1198 (local_port >= MLXSW_PORT_MAX_PORTS)) 1199 goto drop; 1200 1201 rcu_read_lock(); 1202 list_for_each_entry_rcu(rxl_item, &mlxsw_core->rx_listener_list, list) { 1203 rxl = &rxl_item->rxl; 1204 if ((rxl->local_port == MLXSW_PORT_DONT_CARE || 1205 rxl->local_port == local_port) && 1206 rxl->trap_id == rx_info->trap_id) { 1207 found = true; 1208 break; 1209 } 1210 } 1211 rcu_read_unlock(); 1212 if (!found) 1213 goto drop; 1214 1215 pcpu_stats = this_cpu_ptr(mlxsw_core->pcpu_stats); 1216 u64_stats_update_begin(&pcpu_stats->syncp); 1217 pcpu_stats->port_rx_packets[local_port]++; 1218 pcpu_stats->port_rx_bytes[local_port] += skb->len; 1219 pcpu_stats->trap_rx_packets[rx_info->trap_id]++; 1220 pcpu_stats->trap_rx_bytes[rx_info->trap_id] += skb->len; 1221 u64_stats_update_end(&pcpu_stats->syncp); 1222 1223 rxl->func(skb, local_port, rxl_item->priv); 1224 return; 1225 1226 drop: 1227 if (rx_info->trap_id >= MLXSW_TRAP_ID_MAX) 1228 this_cpu_inc(mlxsw_core->pcpu_stats->trap_rx_invalid); 1229 else 1230 this_cpu_inc(mlxsw_core->pcpu_stats->trap_rx_dropped[rx_info->trap_id]); 1231 if (local_port >= MLXSW_PORT_MAX_PORTS) 1232 this_cpu_inc(mlxsw_core->pcpu_stats->port_rx_invalid); 1233 else 1234 this_cpu_inc(mlxsw_core->pcpu_stats->port_rx_dropped[local_port]); 1235 dev_kfree_skb(skb); 1236 } 1237 EXPORT_SYMBOL(mlxsw_core_skb_receive); 1238 1239 int mlxsw_cmd_exec(struct mlxsw_core *mlxsw_core, u16 opcode, u8 opcode_mod, 1240 u32 in_mod, bool out_mbox_direct, 1241 char *in_mbox, size_t in_mbox_size, 1242 char *out_mbox, size_t out_mbox_size) 1243 { 1244 u8 status; 1245 int err; 1246 1247 BUG_ON(in_mbox_size % sizeof(u32) || out_mbox_size % sizeof(u32)); 1248 if (!mlxsw_core->bus->cmd_exec) 1249 return -EOPNOTSUPP; 1250 1251 dev_dbg(mlxsw_core->bus_info->dev, "Cmd exec (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n", 1252 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, in_mod); 1253 if (in_mbox) { 1254 dev_dbg(mlxsw_core->bus_info->dev, "Input mailbox:\n"); 1255 mlxsw_core_buf_dump_dbg(mlxsw_core, in_mbox, in_mbox_size); 1256 } 1257 1258 err = mlxsw_core->bus->cmd_exec(mlxsw_core->bus_priv, opcode, 1259 opcode_mod, in_mod, out_mbox_direct, 1260 in_mbox, in_mbox_size, 1261 out_mbox, out_mbox_size, &status); 1262 1263 if (err == -EIO && status != MLXSW_CMD_STATUS_OK) { 1264 dev_err(mlxsw_core->bus_info->dev, "Cmd exec failed (opcode=%x(%s),opcode_mod=%x,in_mod=%x,status=%x(%s))\n", 1265 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, 1266 in_mod, status, mlxsw_cmd_status_str(status)); 1267 } else if (err == -ETIMEDOUT) { 1268 dev_err(mlxsw_core->bus_info->dev, "Cmd exec timed-out (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n", 1269 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, 1270 in_mod); 1271 } 1272 1273 if (!err && out_mbox) { 1274 dev_dbg(mlxsw_core->bus_info->dev, "Output mailbox:\n"); 1275 mlxsw_core_buf_dump_dbg(mlxsw_core, out_mbox, out_mbox_size); 1276 } 1277 return err; 1278 } 1279 EXPORT_SYMBOL(mlxsw_cmd_exec); 1280 1281 static int __init mlxsw_core_module_init(void) 1282 { 1283 mlxsw_core_dbg_root = debugfs_create_dir(mlxsw_core_driver_name, NULL); 1284 if (!mlxsw_core_dbg_root) 1285 return -ENOMEM; 1286 return 0; 1287 } 1288 1289 static void __exit mlxsw_core_module_exit(void) 1290 { 1291 debugfs_remove_recursive(mlxsw_core_dbg_root); 1292 } 1293 1294 module_init(mlxsw_core_module_init); 1295 module_exit(mlxsw_core_module_exit); 1296 1297 MODULE_LICENSE("Dual BSD/GPL"); 1298 MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>"); 1299 MODULE_DESCRIPTION("Mellanox switch device core driver"); 1300