1 /* 2 * rionet - Ethernet driver over RapidIO messaging services 3 * 4 * Copyright 2005 MontaVista Software, Inc. 5 * Matt Porter <mporter@kernel.crashing.org> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 */ 12 13 #include <linux/module.h> 14 #include <linux/kernel.h> 15 #include <linux/dma-mapping.h> 16 #include <linux/delay.h> 17 #include <linux/rio.h> 18 #include <linux/rio_drv.h> 19 #include <linux/slab.h> 20 #include <linux/rio_ids.h> 21 22 #include <linux/netdevice.h> 23 #include <linux/etherdevice.h> 24 #include <linux/skbuff.h> 25 #include <linux/crc32.h> 26 #include <linux/ethtool.h> 27 #include <linux/reboot.h> 28 29 #define DRV_NAME "rionet" 30 #define DRV_VERSION "0.3" 31 #define DRV_AUTHOR "Matt Porter <mporter@kernel.crashing.org>" 32 #define DRV_DESC "Ethernet over RapidIO" 33 34 MODULE_AUTHOR(DRV_AUTHOR); 35 MODULE_DESCRIPTION(DRV_DESC); 36 MODULE_LICENSE("GPL"); 37 38 #define RIONET_DEFAULT_MSGLEVEL \ 39 (NETIF_MSG_DRV | \ 40 NETIF_MSG_LINK | \ 41 NETIF_MSG_RX_ERR | \ 42 NETIF_MSG_TX_ERR) 43 44 #define RIONET_DOORBELL_JOIN 0x1000 45 #define RIONET_DOORBELL_LEAVE 0x1001 46 47 #define RIONET_MAILBOX 0 48 49 #define RIONET_TX_RING_SIZE CONFIG_RIONET_TX_SIZE 50 #define RIONET_RX_RING_SIZE CONFIG_RIONET_RX_SIZE 51 #define RIONET_MAX_NETS 8 52 #define RIONET_MSG_SIZE RIO_MAX_MSG_SIZE 53 #define RIONET_MAX_MTU (RIONET_MSG_SIZE - ETH_HLEN) 54 55 struct rionet_private { 56 struct rio_mport *mport; 57 struct sk_buff *rx_skb[RIONET_RX_RING_SIZE]; 58 struct sk_buff *tx_skb[RIONET_TX_RING_SIZE]; 59 int rx_slot; 60 int tx_slot; 61 int tx_cnt; 62 int ack_slot; 63 spinlock_t lock; 64 spinlock_t tx_lock; 65 u32 msg_enable; 66 bool open; 67 }; 68 69 struct rionet_peer { 70 struct list_head node; 71 struct rio_dev *rdev; 72 struct resource *res; 73 }; 74 75 struct rionet_net { 76 struct net_device *ndev; 77 struct list_head peers; 78 spinlock_t lock; /* net info access lock */ 79 struct rio_dev **active; 80 int nact; /* number of active peers */ 81 }; 82 83 static struct rionet_net nets[RIONET_MAX_NETS]; 84 85 #define is_rionet_capable(src_ops, dst_ops) \ 86 ((src_ops & RIO_SRC_OPS_DATA_MSG) && \ 87 (dst_ops & RIO_DST_OPS_DATA_MSG) && \ 88 (src_ops & RIO_SRC_OPS_DOORBELL) && \ 89 (dst_ops & RIO_DST_OPS_DOORBELL)) 90 #define dev_rionet_capable(dev) \ 91 is_rionet_capable(dev->src_ops, dev->dst_ops) 92 93 #define RIONET_MAC_MATCH(x) (!memcmp((x), "\00\01\00\01", 4)) 94 #define RIONET_GET_DESTID(x) ((*((u8 *)x + 4) << 8) | *((u8 *)x + 5)) 95 96 static int rionet_rx_clean(struct net_device *ndev) 97 { 98 int i; 99 int error = 0; 100 struct rionet_private *rnet = netdev_priv(ndev); 101 void *data; 102 103 i = rnet->rx_slot; 104 105 do { 106 if (!rnet->rx_skb[i]) 107 continue; 108 109 if (!(data = rio_get_inb_message(rnet->mport, RIONET_MAILBOX))) 110 break; 111 112 rnet->rx_skb[i]->data = data; 113 skb_put(rnet->rx_skb[i], RIO_MAX_MSG_SIZE); 114 rnet->rx_skb[i]->protocol = 115 eth_type_trans(rnet->rx_skb[i], ndev); 116 error = netif_rx(rnet->rx_skb[i]); 117 118 if (error == NET_RX_DROP) { 119 ndev->stats.rx_dropped++; 120 } else { 121 ndev->stats.rx_packets++; 122 ndev->stats.rx_bytes += RIO_MAX_MSG_SIZE; 123 } 124 125 } while ((i = (i + 1) % RIONET_RX_RING_SIZE) != rnet->rx_slot); 126 127 return i; 128 } 129 130 static void rionet_rx_fill(struct net_device *ndev, int end) 131 { 132 int i; 133 struct rionet_private *rnet = netdev_priv(ndev); 134 135 i = rnet->rx_slot; 136 do { 137 rnet->rx_skb[i] = dev_alloc_skb(RIO_MAX_MSG_SIZE); 138 139 if (!rnet->rx_skb[i]) 140 break; 141 142 rio_add_inb_buffer(rnet->mport, RIONET_MAILBOX, 143 rnet->rx_skb[i]->data); 144 } while ((i = (i + 1) % RIONET_RX_RING_SIZE) != end); 145 146 rnet->rx_slot = i; 147 } 148 149 static int rionet_queue_tx_msg(struct sk_buff *skb, struct net_device *ndev, 150 struct rio_dev *rdev) 151 { 152 struct rionet_private *rnet = netdev_priv(ndev); 153 154 rio_add_outb_message(rnet->mport, rdev, 0, skb->data, skb->len); 155 rnet->tx_skb[rnet->tx_slot] = skb; 156 157 ndev->stats.tx_packets++; 158 ndev->stats.tx_bytes += skb->len; 159 160 if (++rnet->tx_cnt == RIONET_TX_RING_SIZE) 161 netif_stop_queue(ndev); 162 163 ++rnet->tx_slot; 164 rnet->tx_slot &= (RIONET_TX_RING_SIZE - 1); 165 166 if (netif_msg_tx_queued(rnet)) 167 printk(KERN_INFO "%s: queued skb len %8.8x\n", DRV_NAME, 168 skb->len); 169 170 return 0; 171 } 172 173 static int rionet_start_xmit(struct sk_buff *skb, struct net_device *ndev) 174 { 175 int i; 176 struct rionet_private *rnet = netdev_priv(ndev); 177 struct ethhdr *eth = (struct ethhdr *)skb->data; 178 u16 destid; 179 unsigned long flags; 180 int add_num = 1; 181 182 spin_lock_irqsave(&rnet->tx_lock, flags); 183 184 if (is_multicast_ether_addr(eth->h_dest)) 185 add_num = nets[rnet->mport->id].nact; 186 187 if ((rnet->tx_cnt + add_num) > RIONET_TX_RING_SIZE) { 188 netif_stop_queue(ndev); 189 spin_unlock_irqrestore(&rnet->tx_lock, flags); 190 printk(KERN_ERR "%s: BUG! Tx Ring full when queue awake!\n", 191 ndev->name); 192 return NETDEV_TX_BUSY; 193 } 194 195 if (is_multicast_ether_addr(eth->h_dest)) { 196 int count = 0; 197 198 for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rnet->mport->sys_size); 199 i++) 200 if (nets[rnet->mport->id].active[i]) { 201 rionet_queue_tx_msg(skb, ndev, 202 nets[rnet->mport->id].active[i]); 203 if (count) 204 refcount_inc(&skb->users); 205 count++; 206 } 207 } else if (RIONET_MAC_MATCH(eth->h_dest)) { 208 destid = RIONET_GET_DESTID(eth->h_dest); 209 if (nets[rnet->mport->id].active[destid]) 210 rionet_queue_tx_msg(skb, ndev, 211 nets[rnet->mport->id].active[destid]); 212 else { 213 /* 214 * If the target device was removed from the list of 215 * active peers but we still have TX packets targeting 216 * it just report sending a packet to the target 217 * (without actual packet transfer). 218 */ 219 ndev->stats.tx_packets++; 220 ndev->stats.tx_bytes += skb->len; 221 dev_kfree_skb_any(skb); 222 } 223 } 224 225 spin_unlock_irqrestore(&rnet->tx_lock, flags); 226 227 return NETDEV_TX_OK; 228 } 229 230 static void rionet_dbell_event(struct rio_mport *mport, void *dev_id, u16 sid, u16 tid, 231 u16 info) 232 { 233 struct net_device *ndev = dev_id; 234 struct rionet_private *rnet = netdev_priv(ndev); 235 struct rionet_peer *peer; 236 unsigned char netid = rnet->mport->id; 237 238 if (netif_msg_intr(rnet)) 239 printk(KERN_INFO "%s: doorbell sid %4.4x tid %4.4x info %4.4x", 240 DRV_NAME, sid, tid, info); 241 if (info == RIONET_DOORBELL_JOIN) { 242 if (!nets[netid].active[sid]) { 243 spin_lock(&nets[netid].lock); 244 list_for_each_entry(peer, &nets[netid].peers, node) { 245 if (peer->rdev->destid == sid) { 246 nets[netid].active[sid] = peer->rdev; 247 nets[netid].nact++; 248 } 249 } 250 spin_unlock(&nets[netid].lock); 251 252 rio_mport_send_doorbell(mport, sid, 253 RIONET_DOORBELL_JOIN); 254 } 255 } else if (info == RIONET_DOORBELL_LEAVE) { 256 spin_lock(&nets[netid].lock); 257 if (nets[netid].active[sid]) { 258 nets[netid].active[sid] = NULL; 259 nets[netid].nact--; 260 } 261 spin_unlock(&nets[netid].lock); 262 } else { 263 if (netif_msg_intr(rnet)) 264 printk(KERN_WARNING "%s: unhandled doorbell\n", 265 DRV_NAME); 266 } 267 } 268 269 static void rionet_inb_msg_event(struct rio_mport *mport, void *dev_id, int mbox, int slot) 270 { 271 int n; 272 struct net_device *ndev = dev_id; 273 struct rionet_private *rnet = netdev_priv(ndev); 274 275 if (netif_msg_intr(rnet)) 276 printk(KERN_INFO "%s: inbound message event, mbox %d slot %d\n", 277 DRV_NAME, mbox, slot); 278 279 spin_lock(&rnet->lock); 280 if ((n = rionet_rx_clean(ndev)) != rnet->rx_slot) 281 rionet_rx_fill(ndev, n); 282 spin_unlock(&rnet->lock); 283 } 284 285 static void rionet_outb_msg_event(struct rio_mport *mport, void *dev_id, int mbox, int slot) 286 { 287 struct net_device *ndev = dev_id; 288 struct rionet_private *rnet = netdev_priv(ndev); 289 290 spin_lock(&rnet->tx_lock); 291 292 if (netif_msg_intr(rnet)) 293 printk(KERN_INFO 294 "%s: outbound message event, mbox %d slot %d\n", 295 DRV_NAME, mbox, slot); 296 297 while (rnet->tx_cnt && (rnet->ack_slot != slot)) { 298 /* dma unmap single */ 299 dev_kfree_skb_irq(rnet->tx_skb[rnet->ack_slot]); 300 rnet->tx_skb[rnet->ack_slot] = NULL; 301 ++rnet->ack_slot; 302 rnet->ack_slot &= (RIONET_TX_RING_SIZE - 1); 303 rnet->tx_cnt--; 304 } 305 306 if (rnet->tx_cnt < RIONET_TX_RING_SIZE) 307 netif_wake_queue(ndev); 308 309 spin_unlock(&rnet->tx_lock); 310 } 311 312 static int rionet_open(struct net_device *ndev) 313 { 314 int i, rc = 0; 315 struct rionet_peer *peer; 316 struct rionet_private *rnet = netdev_priv(ndev); 317 unsigned char netid = rnet->mport->id; 318 unsigned long flags; 319 320 if (netif_msg_ifup(rnet)) 321 printk(KERN_INFO "%s: open\n", DRV_NAME); 322 323 if ((rc = rio_request_inb_dbell(rnet->mport, 324 (void *)ndev, 325 RIONET_DOORBELL_JOIN, 326 RIONET_DOORBELL_LEAVE, 327 rionet_dbell_event)) < 0) 328 goto out; 329 330 if ((rc = rio_request_inb_mbox(rnet->mport, 331 (void *)ndev, 332 RIONET_MAILBOX, 333 RIONET_RX_RING_SIZE, 334 rionet_inb_msg_event)) < 0) 335 goto out; 336 337 if ((rc = rio_request_outb_mbox(rnet->mport, 338 (void *)ndev, 339 RIONET_MAILBOX, 340 RIONET_TX_RING_SIZE, 341 rionet_outb_msg_event)) < 0) 342 goto out; 343 344 /* Initialize inbound message ring */ 345 for (i = 0; i < RIONET_RX_RING_SIZE; i++) 346 rnet->rx_skb[i] = NULL; 347 rnet->rx_slot = 0; 348 rionet_rx_fill(ndev, 0); 349 350 rnet->tx_slot = 0; 351 rnet->tx_cnt = 0; 352 rnet->ack_slot = 0; 353 354 netif_carrier_on(ndev); 355 netif_start_queue(ndev); 356 357 spin_lock_irqsave(&nets[netid].lock, flags); 358 list_for_each_entry(peer, &nets[netid].peers, node) { 359 /* Send a join message */ 360 rio_send_doorbell(peer->rdev, RIONET_DOORBELL_JOIN); 361 } 362 spin_unlock_irqrestore(&nets[netid].lock, flags); 363 rnet->open = true; 364 365 out: 366 return rc; 367 } 368 369 static int rionet_close(struct net_device *ndev) 370 { 371 struct rionet_private *rnet = netdev_priv(ndev); 372 struct rionet_peer *peer; 373 unsigned char netid = rnet->mport->id; 374 unsigned long flags; 375 int i; 376 377 if (netif_msg_ifup(rnet)) 378 printk(KERN_INFO "%s: close %s\n", DRV_NAME, ndev->name); 379 380 netif_stop_queue(ndev); 381 netif_carrier_off(ndev); 382 rnet->open = false; 383 384 for (i = 0; i < RIONET_RX_RING_SIZE; i++) 385 kfree_skb(rnet->rx_skb[i]); 386 387 spin_lock_irqsave(&nets[netid].lock, flags); 388 list_for_each_entry(peer, &nets[netid].peers, node) { 389 if (nets[netid].active[peer->rdev->destid]) { 390 rio_send_doorbell(peer->rdev, RIONET_DOORBELL_LEAVE); 391 nets[netid].active[peer->rdev->destid] = NULL; 392 } 393 if (peer->res) 394 rio_release_outb_dbell(peer->rdev, peer->res); 395 } 396 spin_unlock_irqrestore(&nets[netid].lock, flags); 397 398 rio_release_inb_dbell(rnet->mport, RIONET_DOORBELL_JOIN, 399 RIONET_DOORBELL_LEAVE); 400 rio_release_inb_mbox(rnet->mport, RIONET_MAILBOX); 401 rio_release_outb_mbox(rnet->mport, RIONET_MAILBOX); 402 403 return 0; 404 } 405 406 static void rionet_remove_dev(struct device *dev, struct subsys_interface *sif) 407 { 408 struct rio_dev *rdev = to_rio_dev(dev); 409 unsigned char netid = rdev->net->hport->id; 410 struct rionet_peer *peer; 411 int state, found = 0; 412 unsigned long flags; 413 414 if (!dev_rionet_capable(rdev)) 415 return; 416 417 spin_lock_irqsave(&nets[netid].lock, flags); 418 list_for_each_entry(peer, &nets[netid].peers, node) { 419 if (peer->rdev == rdev) { 420 list_del(&peer->node); 421 if (nets[netid].active[rdev->destid]) { 422 state = atomic_read(&rdev->state); 423 if (state != RIO_DEVICE_GONE && 424 state != RIO_DEVICE_INITIALIZING) { 425 rio_send_doorbell(rdev, 426 RIONET_DOORBELL_LEAVE); 427 } 428 nets[netid].active[rdev->destid] = NULL; 429 nets[netid].nact--; 430 } 431 found = 1; 432 break; 433 } 434 } 435 spin_unlock_irqrestore(&nets[netid].lock, flags); 436 437 if (found) { 438 if (peer->res) 439 rio_release_outb_dbell(rdev, peer->res); 440 kfree(peer); 441 } 442 } 443 444 static void rionet_get_drvinfo(struct net_device *ndev, 445 struct ethtool_drvinfo *info) 446 { 447 struct rionet_private *rnet = netdev_priv(ndev); 448 449 strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); 450 strlcpy(info->version, DRV_VERSION, sizeof(info->version)); 451 strlcpy(info->fw_version, "n/a", sizeof(info->fw_version)); 452 strlcpy(info->bus_info, rnet->mport->name, sizeof(info->bus_info)); 453 } 454 455 static u32 rionet_get_msglevel(struct net_device *ndev) 456 { 457 struct rionet_private *rnet = netdev_priv(ndev); 458 459 return rnet->msg_enable; 460 } 461 462 static void rionet_set_msglevel(struct net_device *ndev, u32 value) 463 { 464 struct rionet_private *rnet = netdev_priv(ndev); 465 466 rnet->msg_enable = value; 467 } 468 469 static const struct ethtool_ops rionet_ethtool_ops = { 470 .get_drvinfo = rionet_get_drvinfo, 471 .get_msglevel = rionet_get_msglevel, 472 .set_msglevel = rionet_set_msglevel, 473 .get_link = ethtool_op_get_link, 474 }; 475 476 static const struct net_device_ops rionet_netdev_ops = { 477 .ndo_open = rionet_open, 478 .ndo_stop = rionet_close, 479 .ndo_start_xmit = rionet_start_xmit, 480 .ndo_validate_addr = eth_validate_addr, 481 .ndo_set_mac_address = eth_mac_addr, 482 }; 483 484 static int rionet_setup_netdev(struct rio_mport *mport, struct net_device *ndev) 485 { 486 int rc = 0; 487 struct rionet_private *rnet; 488 u16 device_id; 489 const size_t rionet_active_bytes = sizeof(void *) * 490 RIO_MAX_ROUTE_ENTRIES(mport->sys_size); 491 492 nets[mport->id].active = (struct rio_dev **)__get_free_pages(GFP_KERNEL, 493 get_order(rionet_active_bytes)); 494 if (!nets[mport->id].active) { 495 rc = -ENOMEM; 496 goto out; 497 } 498 memset((void *)nets[mport->id].active, 0, rionet_active_bytes); 499 500 /* Set up private area */ 501 rnet = netdev_priv(ndev); 502 rnet->mport = mport; 503 rnet->open = false; 504 505 /* Set the default MAC address */ 506 device_id = rio_local_get_device_id(mport); 507 ndev->dev_addr[0] = 0x00; 508 ndev->dev_addr[1] = 0x01; 509 ndev->dev_addr[2] = 0x00; 510 ndev->dev_addr[3] = 0x01; 511 ndev->dev_addr[4] = device_id >> 8; 512 ndev->dev_addr[5] = device_id & 0xff; 513 514 ndev->netdev_ops = &rionet_netdev_ops; 515 ndev->mtu = RIONET_MAX_MTU; 516 /* MTU range: 68 - 4082 */ 517 ndev->min_mtu = ETH_MIN_MTU; 518 ndev->max_mtu = RIONET_MAX_MTU; 519 ndev->features = NETIF_F_LLTX; 520 SET_NETDEV_DEV(ndev, &mport->dev); 521 ndev->ethtool_ops = &rionet_ethtool_ops; 522 523 spin_lock_init(&rnet->lock); 524 spin_lock_init(&rnet->tx_lock); 525 526 rnet->msg_enable = RIONET_DEFAULT_MSGLEVEL; 527 528 rc = register_netdev(ndev); 529 if (rc != 0) { 530 free_pages((unsigned long)nets[mport->id].active, 531 get_order(rionet_active_bytes)); 532 goto out; 533 } 534 535 printk(KERN_INFO "%s: %s %s Version %s, MAC %pM, %s\n", 536 ndev->name, 537 DRV_NAME, 538 DRV_DESC, 539 DRV_VERSION, 540 ndev->dev_addr, 541 mport->name); 542 543 out: 544 return rc; 545 } 546 547 static int rionet_add_dev(struct device *dev, struct subsys_interface *sif) 548 { 549 int rc = -ENODEV; 550 u32 lsrc_ops, ldst_ops; 551 struct rionet_peer *peer; 552 struct net_device *ndev = NULL; 553 struct rio_dev *rdev = to_rio_dev(dev); 554 unsigned char netid = rdev->net->hport->id; 555 556 if (netid >= RIONET_MAX_NETS) 557 return rc; 558 559 /* 560 * If first time through this net, make sure local device is rionet 561 * capable and setup netdev (this step will be skipped in later probes 562 * on the same net). 563 */ 564 if (!nets[netid].ndev) { 565 rio_local_read_config_32(rdev->net->hport, RIO_SRC_OPS_CAR, 566 &lsrc_ops); 567 rio_local_read_config_32(rdev->net->hport, RIO_DST_OPS_CAR, 568 &ldst_ops); 569 if (!is_rionet_capable(lsrc_ops, ldst_ops)) { 570 printk(KERN_ERR 571 "%s: local device %s is not network capable\n", 572 DRV_NAME, rdev->net->hport->name); 573 goto out; 574 } 575 576 /* Allocate our net_device structure */ 577 ndev = alloc_etherdev(sizeof(struct rionet_private)); 578 if (ndev == NULL) { 579 rc = -ENOMEM; 580 goto out; 581 } 582 583 rc = rionet_setup_netdev(rdev->net->hport, ndev); 584 if (rc) { 585 printk(KERN_ERR "%s: failed to setup netdev (rc=%d)\n", 586 DRV_NAME, rc); 587 free_netdev(ndev); 588 goto out; 589 } 590 591 INIT_LIST_HEAD(&nets[netid].peers); 592 spin_lock_init(&nets[netid].lock); 593 nets[netid].nact = 0; 594 nets[netid].ndev = ndev; 595 } 596 597 /* 598 * If the remote device has mailbox/doorbell capabilities, 599 * add it to the peer list. 600 */ 601 if (dev_rionet_capable(rdev)) { 602 struct rionet_private *rnet; 603 unsigned long flags; 604 605 rnet = netdev_priv(nets[netid].ndev); 606 607 peer = kzalloc(sizeof(*peer), GFP_KERNEL); 608 if (!peer) { 609 rc = -ENOMEM; 610 goto out; 611 } 612 peer->rdev = rdev; 613 peer->res = rio_request_outb_dbell(peer->rdev, 614 RIONET_DOORBELL_JOIN, 615 RIONET_DOORBELL_LEAVE); 616 if (!peer->res) { 617 pr_err("%s: error requesting doorbells\n", DRV_NAME); 618 kfree(peer); 619 rc = -ENOMEM; 620 goto out; 621 } 622 623 spin_lock_irqsave(&nets[netid].lock, flags); 624 list_add_tail(&peer->node, &nets[netid].peers); 625 spin_unlock_irqrestore(&nets[netid].lock, flags); 626 pr_debug("%s: %s add peer %s\n", 627 DRV_NAME, __func__, rio_name(rdev)); 628 629 /* If netdev is already opened, send join request to new peer */ 630 if (rnet->open) 631 rio_send_doorbell(peer->rdev, RIONET_DOORBELL_JOIN); 632 } 633 634 return 0; 635 out: 636 return rc; 637 } 638 639 static int rionet_shutdown(struct notifier_block *nb, unsigned long code, 640 void *unused) 641 { 642 struct rionet_peer *peer; 643 unsigned long flags; 644 int i; 645 646 pr_debug("%s: %s\n", DRV_NAME, __func__); 647 648 for (i = 0; i < RIONET_MAX_NETS; i++) { 649 if (!nets[i].ndev) 650 continue; 651 652 spin_lock_irqsave(&nets[i].lock, flags); 653 list_for_each_entry(peer, &nets[i].peers, node) { 654 if (nets[i].active[peer->rdev->destid]) { 655 rio_send_doorbell(peer->rdev, 656 RIONET_DOORBELL_LEAVE); 657 nets[i].active[peer->rdev->destid] = NULL; 658 } 659 } 660 spin_unlock_irqrestore(&nets[i].lock, flags); 661 } 662 663 return NOTIFY_DONE; 664 } 665 666 static void rionet_remove_mport(struct device *dev, 667 struct class_interface *class_intf) 668 { 669 struct rio_mport *mport = to_rio_mport(dev); 670 struct net_device *ndev; 671 int id = mport->id; 672 673 pr_debug("%s %s\n", __func__, mport->name); 674 675 WARN(nets[id].nact, "%s called when connected to %d peers\n", 676 __func__, nets[id].nact); 677 WARN(!nets[id].ndev, "%s called for mport without NDEV\n", 678 __func__); 679 680 if (nets[id].ndev) { 681 ndev = nets[id].ndev; 682 netif_stop_queue(ndev); 683 unregister_netdev(ndev); 684 685 free_pages((unsigned long)nets[id].active, 686 get_order(sizeof(void *) * 687 RIO_MAX_ROUTE_ENTRIES(mport->sys_size))); 688 nets[id].active = NULL; 689 free_netdev(ndev); 690 nets[id].ndev = NULL; 691 } 692 } 693 694 #ifdef MODULE 695 static struct rio_device_id rionet_id_table[] = { 696 {RIO_DEVICE(RIO_ANY_ID, RIO_ANY_ID)}, 697 { 0, } /* terminate list */ 698 }; 699 700 MODULE_DEVICE_TABLE(rapidio, rionet_id_table); 701 #endif 702 703 static struct subsys_interface rionet_interface = { 704 .name = "rionet", 705 .subsys = &rio_bus_type, 706 .add_dev = rionet_add_dev, 707 .remove_dev = rionet_remove_dev, 708 }; 709 710 static struct notifier_block rionet_notifier = { 711 .notifier_call = rionet_shutdown, 712 }; 713 714 /* the rio_mport_interface is used to handle local mport devices */ 715 static struct class_interface rio_mport_interface __refdata = { 716 .class = &rio_mport_class, 717 .add_dev = NULL, 718 .remove_dev = rionet_remove_mport, 719 }; 720 721 static int __init rionet_init(void) 722 { 723 int ret; 724 725 ret = register_reboot_notifier(&rionet_notifier); 726 if (ret) { 727 pr_err("%s: failed to register reboot notifier (err=%d)\n", 728 DRV_NAME, ret); 729 return ret; 730 } 731 732 ret = class_interface_register(&rio_mport_interface); 733 if (ret) { 734 pr_err("%s: class_interface_register error: %d\n", 735 DRV_NAME, ret); 736 return ret; 737 } 738 739 return subsys_interface_register(&rionet_interface); 740 } 741 742 static void __exit rionet_exit(void) 743 { 744 unregister_reboot_notifier(&rionet_notifier); 745 subsys_interface_unregister(&rionet_interface); 746 class_interface_unregister(&rio_mport_interface); 747 } 748 749 late_initcall(rionet_init); 750 module_exit(rionet_exit); 751