| 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/rio_ids.h> |
| 20 | |
| 21 | #include <linux/netdevice.h> |
| 22 | #include <linux/etherdevice.h> |
| 23 | #include <linux/skbuff.h> |
| 24 | #include <linux/crc32.h> |
| 25 | #include <linux/ethtool.h> |
| 26 | |
| 27 | #define DRV_NAME "rionet" |
| 28 | #define DRV_VERSION "0.2" |
| 29 | #define DRV_AUTHOR "Matt Porter <mporter@kernel.crashing.org>" |
| 30 | #define DRV_DESC "Ethernet over RapidIO" |
| 31 | |
| 32 | MODULE_AUTHOR(DRV_AUTHOR); |
| 33 | MODULE_DESCRIPTION(DRV_DESC); |
| 34 | MODULE_LICENSE("GPL"); |
| 35 | |
| 36 | #define RIONET_DEFAULT_MSGLEVEL \ |
| 37 | (NETIF_MSG_DRV | \ |
| 38 | NETIF_MSG_LINK | \ |
| 39 | NETIF_MSG_RX_ERR | \ |
| 40 | NETIF_MSG_TX_ERR) |
| 41 | |
| 42 | #define RIONET_DOORBELL_JOIN 0x1000 |
| 43 | #define RIONET_DOORBELL_LEAVE 0x1001 |
| 44 | |
| 45 | #define RIONET_MAILBOX 0 |
| 46 | |
| 47 | #define RIONET_TX_RING_SIZE CONFIG_RIONET_TX_SIZE |
| 48 | #define RIONET_RX_RING_SIZE CONFIG_RIONET_RX_SIZE |
| 49 | |
| 50 | static LIST_HEAD(rionet_peers); |
| 51 | |
| 52 | struct rionet_private { |
| 53 | struct rio_mport *mport; |
| 54 | struct sk_buff *rx_skb[RIONET_RX_RING_SIZE]; |
| 55 | struct sk_buff *tx_skb[RIONET_TX_RING_SIZE]; |
| 56 | int rx_slot; |
| 57 | int tx_slot; |
| 58 | int tx_cnt; |
| 59 | int ack_slot; |
| 60 | spinlock_t lock; |
| 61 | spinlock_t tx_lock; |
| 62 | u32 msg_enable; |
| 63 | }; |
| 64 | |
| 65 | struct rionet_peer { |
| 66 | struct list_head node; |
| 67 | struct rio_dev *rdev; |
| 68 | struct resource *res; |
| 69 | }; |
| 70 | |
| 71 | static int rionet_check = 0; |
| 72 | static int rionet_capable = 1; |
| 73 | |
| 74 | /* |
| 75 | * This is a fast lookup table for for translating TX |
| 76 | * Ethernet packets into a destination RIO device. It |
| 77 | * could be made into a hash table to save memory depending |
| 78 | * on system trade-offs. |
| 79 | */ |
| 80 | static struct rio_dev **rionet_active; |
| 81 | |
| 82 | #define is_rionet_capable(pef, src_ops, dst_ops) \ |
| 83 | ((pef & RIO_PEF_INB_MBOX) && \ |
| 84 | (pef & RIO_PEF_INB_DOORBELL) && \ |
| 85 | (src_ops & RIO_SRC_OPS_DOORBELL) && \ |
| 86 | (dst_ops & RIO_DST_OPS_DOORBELL)) |
| 87 | #define dev_rionet_capable(dev) \ |
| 88 | is_rionet_capable(dev->pef, dev->src_ops, dev->dst_ops) |
| 89 | |
| 90 | #define RIONET_MAC_MATCH(x) (*(u32 *)x == 0x00010001) |
| 91 | #define RIONET_GET_DESTID(x) (*(u16 *)(x + 4)) |
| 92 | |
| 93 | static int rionet_rx_clean(struct net_device *ndev) |
| 94 | { |
| 95 | int i; |
| 96 | int error = 0; |
| 97 | struct rionet_private *rnet = netdev_priv(ndev); |
| 98 | void *data; |
| 99 | |
| 100 | i = rnet->rx_slot; |
| 101 | |
| 102 | do { |
| 103 | if (!rnet->rx_skb[i]) |
| 104 | continue; |
| 105 | |
| 106 | if (!(data = rio_get_inb_message(rnet->mport, RIONET_MAILBOX))) |
| 107 | break; |
| 108 | |
| 109 | rnet->rx_skb[i]->data = data; |
| 110 | skb_put(rnet->rx_skb[i], RIO_MAX_MSG_SIZE); |
| 111 | rnet->rx_skb[i]->protocol = |
| 112 | eth_type_trans(rnet->rx_skb[i], ndev); |
| 113 | error = netif_rx(rnet->rx_skb[i]); |
| 114 | |
| 115 | if (error == NET_RX_DROP) { |
| 116 | ndev->stats.rx_dropped++; |
| 117 | } else { |
| 118 | ndev->stats.rx_packets++; |
| 119 | ndev->stats.rx_bytes += RIO_MAX_MSG_SIZE; |
| 120 | } |
| 121 | |
| 122 | } while ((i = (i + 1) % RIONET_RX_RING_SIZE) != rnet->rx_slot); |
| 123 | |
| 124 | return i; |
| 125 | } |
| 126 | |
| 127 | static void rionet_rx_fill(struct net_device *ndev, int end) |
| 128 | { |
| 129 | int i; |
| 130 | struct rionet_private *rnet = netdev_priv(ndev); |
| 131 | |
| 132 | i = rnet->rx_slot; |
| 133 | do { |
| 134 | rnet->rx_skb[i] = dev_alloc_skb(RIO_MAX_MSG_SIZE); |
| 135 | |
| 136 | if (!rnet->rx_skb[i]) |
| 137 | break; |
| 138 | |
| 139 | rio_add_inb_buffer(rnet->mport, RIONET_MAILBOX, |
| 140 | rnet->rx_skb[i]->data); |
| 141 | } while ((i = (i + 1) % RIONET_RX_RING_SIZE) != end); |
| 142 | |
| 143 | rnet->rx_slot = i; |
| 144 | } |
| 145 | |
| 146 | static int rionet_queue_tx_msg(struct sk_buff *skb, struct net_device *ndev, |
| 147 | struct rio_dev *rdev) |
| 148 | { |
| 149 | struct rionet_private *rnet = netdev_priv(ndev); |
| 150 | |
| 151 | rio_add_outb_message(rnet->mport, rdev, 0, skb->data, skb->len); |
| 152 | rnet->tx_skb[rnet->tx_slot] = skb; |
| 153 | |
| 154 | ndev->stats.tx_packets++; |
| 155 | ndev->stats.tx_bytes += skb->len; |
| 156 | |
| 157 | if (++rnet->tx_cnt == RIONET_TX_RING_SIZE) |
| 158 | netif_stop_queue(ndev); |
| 159 | |
| 160 | ++rnet->tx_slot; |
| 161 | rnet->tx_slot &= (RIONET_TX_RING_SIZE - 1); |
| 162 | |
| 163 | if (netif_msg_tx_queued(rnet)) |
| 164 | printk(KERN_INFO "%s: queued skb %8.8x len %8.8x\n", DRV_NAME, |
| 165 | (u32) skb, skb->len); |
| 166 | |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | static int rionet_start_xmit(struct sk_buff *skb, struct net_device *ndev) |
| 171 | { |
| 172 | int i; |
| 173 | struct rionet_private *rnet = netdev_priv(ndev); |
| 174 | struct ethhdr *eth = (struct ethhdr *)skb->data; |
| 175 | u16 destid; |
| 176 | unsigned long flags; |
| 177 | |
| 178 | local_irq_save(flags); |
| 179 | if (!spin_trylock(&rnet->tx_lock)) { |
| 180 | local_irq_restore(flags); |
| 181 | return NETDEV_TX_LOCKED; |
| 182 | } |
| 183 | |
| 184 | if ((rnet->tx_cnt + 1) > RIONET_TX_RING_SIZE) { |
| 185 | netif_stop_queue(ndev); |
| 186 | spin_unlock_irqrestore(&rnet->tx_lock, flags); |
| 187 | printk(KERN_ERR "%s: BUG! Tx Ring full when queue awake!\n", |
| 188 | ndev->name); |
| 189 | return NETDEV_TX_BUSY; |
| 190 | } |
| 191 | |
| 192 | if (eth->h_dest[0] & 0x01) { |
| 193 | for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rnet->mport->sys_size); |
| 194 | i++) |
| 195 | if (rionet_active[i]) |
| 196 | rionet_queue_tx_msg(skb, ndev, |
| 197 | rionet_active[i]); |
| 198 | } else if (RIONET_MAC_MATCH(eth->h_dest)) { |
| 199 | destid = RIONET_GET_DESTID(eth->h_dest); |
| 200 | if (rionet_active[destid]) |
| 201 | rionet_queue_tx_msg(skb, ndev, rionet_active[destid]); |
| 202 | } |
| 203 | |
| 204 | spin_unlock_irqrestore(&rnet->tx_lock, flags); |
| 205 | |
| 206 | return NETDEV_TX_OK; |
| 207 | } |
| 208 | |
| 209 | static void rionet_dbell_event(struct rio_mport *mport, void *dev_id, u16 sid, u16 tid, |
| 210 | u16 info) |
| 211 | { |
| 212 | struct net_device *ndev = dev_id; |
| 213 | struct rionet_private *rnet = netdev_priv(ndev); |
| 214 | struct rionet_peer *peer; |
| 215 | |
| 216 | if (netif_msg_intr(rnet)) |
| 217 | printk(KERN_INFO "%s: doorbell sid %4.4x tid %4.4x info %4.4x", |
| 218 | DRV_NAME, sid, tid, info); |
| 219 | if (info == RIONET_DOORBELL_JOIN) { |
| 220 | if (!rionet_active[sid]) { |
| 221 | list_for_each_entry(peer, &rionet_peers, node) { |
| 222 | if (peer->rdev->destid == sid) |
| 223 | rionet_active[sid] = peer->rdev; |
| 224 | } |
| 225 | rio_mport_send_doorbell(mport, sid, |
| 226 | RIONET_DOORBELL_JOIN); |
| 227 | } |
| 228 | } else if (info == RIONET_DOORBELL_LEAVE) { |
| 229 | rionet_active[sid] = NULL; |
| 230 | } else { |
| 231 | if (netif_msg_intr(rnet)) |
| 232 | printk(KERN_WARNING "%s: unhandled doorbell\n", |
| 233 | DRV_NAME); |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | static void rionet_inb_msg_event(struct rio_mport *mport, void *dev_id, int mbox, int slot) |
| 238 | { |
| 239 | int n; |
| 240 | struct net_device *ndev = dev_id; |
| 241 | struct rionet_private *rnet = netdev_priv(ndev); |
| 242 | |
| 243 | if (netif_msg_intr(rnet)) |
| 244 | printk(KERN_INFO "%s: inbound message event, mbox %d slot %d\n", |
| 245 | DRV_NAME, mbox, slot); |
| 246 | |
| 247 | spin_lock(&rnet->lock); |
| 248 | if ((n = rionet_rx_clean(ndev)) != rnet->rx_slot) |
| 249 | rionet_rx_fill(ndev, n); |
| 250 | spin_unlock(&rnet->lock); |
| 251 | } |
| 252 | |
| 253 | static void rionet_outb_msg_event(struct rio_mport *mport, void *dev_id, int mbox, int slot) |
| 254 | { |
| 255 | struct net_device *ndev = dev_id; |
| 256 | struct rionet_private *rnet = netdev_priv(ndev); |
| 257 | |
| 258 | spin_lock(&rnet->lock); |
| 259 | |
| 260 | if (netif_msg_intr(rnet)) |
| 261 | printk(KERN_INFO |
| 262 | "%s: outbound message event, mbox %d slot %d\n", |
| 263 | DRV_NAME, mbox, slot); |
| 264 | |
| 265 | while (rnet->tx_cnt && (rnet->ack_slot != slot)) { |
| 266 | /* dma unmap single */ |
| 267 | dev_kfree_skb_irq(rnet->tx_skb[rnet->ack_slot]); |
| 268 | rnet->tx_skb[rnet->ack_slot] = NULL; |
| 269 | ++rnet->ack_slot; |
| 270 | rnet->ack_slot &= (RIONET_TX_RING_SIZE - 1); |
| 271 | rnet->tx_cnt--; |
| 272 | } |
| 273 | |
| 274 | if (rnet->tx_cnt < RIONET_TX_RING_SIZE) |
| 275 | netif_wake_queue(ndev); |
| 276 | |
| 277 | spin_unlock(&rnet->lock); |
| 278 | } |
| 279 | |
| 280 | static int rionet_open(struct net_device *ndev) |
| 281 | { |
| 282 | int i, rc = 0; |
| 283 | struct rionet_peer *peer, *tmp; |
| 284 | u32 pwdcsr; |
| 285 | struct rionet_private *rnet = netdev_priv(ndev); |
| 286 | |
| 287 | if (netif_msg_ifup(rnet)) |
| 288 | printk(KERN_INFO "%s: open\n", DRV_NAME); |
| 289 | |
| 290 | if ((rc = rio_request_inb_dbell(rnet->mport, |
| 291 | (void *)ndev, |
| 292 | RIONET_DOORBELL_JOIN, |
| 293 | RIONET_DOORBELL_LEAVE, |
| 294 | rionet_dbell_event)) < 0) |
| 295 | goto out; |
| 296 | |
| 297 | if ((rc = rio_request_inb_mbox(rnet->mport, |
| 298 | (void *)ndev, |
| 299 | RIONET_MAILBOX, |
| 300 | RIONET_RX_RING_SIZE, |
| 301 | rionet_inb_msg_event)) < 0) |
| 302 | goto out; |
| 303 | |
| 304 | if ((rc = rio_request_outb_mbox(rnet->mport, |
| 305 | (void *)ndev, |
| 306 | RIONET_MAILBOX, |
| 307 | RIONET_TX_RING_SIZE, |
| 308 | rionet_outb_msg_event)) < 0) |
| 309 | goto out; |
| 310 | |
| 311 | /* Initialize inbound message ring */ |
| 312 | for (i = 0; i < RIONET_RX_RING_SIZE; i++) |
| 313 | rnet->rx_skb[i] = NULL; |
| 314 | rnet->rx_slot = 0; |
| 315 | rionet_rx_fill(ndev, 0); |
| 316 | |
| 317 | rnet->tx_slot = 0; |
| 318 | rnet->tx_cnt = 0; |
| 319 | rnet->ack_slot = 0; |
| 320 | |
| 321 | netif_carrier_on(ndev); |
| 322 | netif_start_queue(ndev); |
| 323 | |
| 324 | list_for_each_entry_safe(peer, tmp, &rionet_peers, node) { |
| 325 | if (!(peer->res = rio_request_outb_dbell(peer->rdev, |
| 326 | RIONET_DOORBELL_JOIN, |
| 327 | RIONET_DOORBELL_LEAVE))) |
| 328 | { |
| 329 | printk(KERN_ERR "%s: error requesting doorbells\n", |
| 330 | DRV_NAME); |
| 331 | continue; |
| 332 | } |
| 333 | |
| 334 | /* |
| 335 | * If device has initialized inbound doorbells, |
| 336 | * send a join message |
| 337 | */ |
| 338 | rio_read_config_32(peer->rdev, RIO_WRITE_PORT_CSR, &pwdcsr); |
| 339 | if (pwdcsr & RIO_DOORBELL_AVAIL) |
| 340 | rio_send_doorbell(peer->rdev, RIONET_DOORBELL_JOIN); |
| 341 | } |
| 342 | |
| 343 | out: |
| 344 | return rc; |
| 345 | } |
| 346 | |
| 347 | static int rionet_close(struct net_device *ndev) |
| 348 | { |
| 349 | struct rionet_private *rnet = netdev_priv(ndev); |
| 350 | struct rionet_peer *peer, *tmp; |
| 351 | int i; |
| 352 | |
| 353 | if (netif_msg_ifup(rnet)) |
| 354 | printk(KERN_INFO "%s: close\n", DRV_NAME); |
| 355 | |
| 356 | netif_stop_queue(ndev); |
| 357 | netif_carrier_off(ndev); |
| 358 | |
| 359 | for (i = 0; i < RIONET_RX_RING_SIZE; i++) |
| 360 | kfree_skb(rnet->rx_skb[i]); |
| 361 | |
| 362 | list_for_each_entry_safe(peer, tmp, &rionet_peers, node) { |
| 363 | if (rionet_active[peer->rdev->destid]) { |
| 364 | rio_send_doorbell(peer->rdev, RIONET_DOORBELL_LEAVE); |
| 365 | rionet_active[peer->rdev->destid] = NULL; |
| 366 | } |
| 367 | rio_release_outb_dbell(peer->rdev, peer->res); |
| 368 | } |
| 369 | |
| 370 | rio_release_inb_dbell(rnet->mport, RIONET_DOORBELL_JOIN, |
| 371 | RIONET_DOORBELL_LEAVE); |
| 372 | rio_release_inb_mbox(rnet->mport, RIONET_MAILBOX); |
| 373 | rio_release_outb_mbox(rnet->mport, RIONET_MAILBOX); |
| 374 | |
| 375 | return 0; |
| 376 | } |
| 377 | |
| 378 | static void rionet_remove(struct rio_dev *rdev) |
| 379 | { |
| 380 | struct net_device *ndev = NULL; |
| 381 | struct rionet_peer *peer, *tmp; |
| 382 | |
| 383 | free_pages((unsigned long)rionet_active, rdev->net->hport->sys_size ? |
| 384 | __ilog2(sizeof(void *)) + 4 : 0); |
| 385 | unregister_netdev(ndev); |
| 386 | kfree(ndev); |
| 387 | |
| 388 | list_for_each_entry_safe(peer, tmp, &rionet_peers, node) { |
| 389 | list_del(&peer->node); |
| 390 | kfree(peer); |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | static void rionet_get_drvinfo(struct net_device *ndev, |
| 395 | struct ethtool_drvinfo *info) |
| 396 | { |
| 397 | struct rionet_private *rnet = netdev_priv(ndev); |
| 398 | |
| 399 | strcpy(info->driver, DRV_NAME); |
| 400 | strcpy(info->version, DRV_VERSION); |
| 401 | strcpy(info->fw_version, "n/a"); |
| 402 | strcpy(info->bus_info, rnet->mport->name); |
| 403 | } |
| 404 | |
| 405 | static u32 rionet_get_msglevel(struct net_device *ndev) |
| 406 | { |
| 407 | struct rionet_private *rnet = netdev_priv(ndev); |
| 408 | |
| 409 | return rnet->msg_enable; |
| 410 | } |
| 411 | |
| 412 | static void rionet_set_msglevel(struct net_device *ndev, u32 value) |
| 413 | { |
| 414 | struct rionet_private *rnet = netdev_priv(ndev); |
| 415 | |
| 416 | rnet->msg_enable = value; |
| 417 | } |
| 418 | |
| 419 | static const struct ethtool_ops rionet_ethtool_ops = { |
| 420 | .get_drvinfo = rionet_get_drvinfo, |
| 421 | .get_msglevel = rionet_get_msglevel, |
| 422 | .set_msglevel = rionet_set_msglevel, |
| 423 | .get_link = ethtool_op_get_link, |
| 424 | }; |
| 425 | |
| 426 | static const struct net_device_ops rionet_netdev_ops = { |
| 427 | .ndo_open = rionet_open, |
| 428 | .ndo_stop = rionet_close, |
| 429 | .ndo_start_xmit = rionet_start_xmit, |
| 430 | .ndo_change_mtu = eth_change_mtu, |
| 431 | .ndo_validate_addr = eth_validate_addr, |
| 432 | .ndo_set_mac_address = eth_mac_addr, |
| 433 | }; |
| 434 | |
| 435 | static int rionet_setup_netdev(struct rio_mport *mport) |
| 436 | { |
| 437 | int rc = 0; |
| 438 | struct net_device *ndev = NULL; |
| 439 | struct rionet_private *rnet; |
| 440 | u16 device_id; |
| 441 | |
| 442 | /* Allocate our net_device structure */ |
| 443 | ndev = alloc_etherdev(sizeof(struct rionet_private)); |
| 444 | if (ndev == NULL) { |
| 445 | printk(KERN_INFO "%s: could not allocate ethernet device.\n", |
| 446 | DRV_NAME); |
| 447 | rc = -ENOMEM; |
| 448 | goto out; |
| 449 | } |
| 450 | |
| 451 | rionet_active = (struct rio_dev **)__get_free_pages(GFP_KERNEL, |
| 452 | mport->sys_size ? __ilog2(sizeof(void *)) + 4 : 0); |
| 453 | if (!rionet_active) { |
| 454 | rc = -ENOMEM; |
| 455 | goto out; |
| 456 | } |
| 457 | memset((void *)rionet_active, 0, sizeof(void *) * |
| 458 | RIO_MAX_ROUTE_ENTRIES(mport->sys_size)); |
| 459 | |
| 460 | /* Set up private area */ |
| 461 | rnet = netdev_priv(ndev); |
| 462 | rnet->mport = mport; |
| 463 | |
| 464 | /* Set the default MAC address */ |
| 465 | device_id = rio_local_get_device_id(mport); |
| 466 | ndev->dev_addr[0] = 0x00; |
| 467 | ndev->dev_addr[1] = 0x01; |
| 468 | ndev->dev_addr[2] = 0x00; |
| 469 | ndev->dev_addr[3] = 0x01; |
| 470 | ndev->dev_addr[4] = device_id >> 8; |
| 471 | ndev->dev_addr[5] = device_id & 0xff; |
| 472 | |
| 473 | ndev->netdev_ops = &rionet_netdev_ops; |
| 474 | ndev->mtu = RIO_MAX_MSG_SIZE - 14; |
| 475 | ndev->features = NETIF_F_LLTX; |
| 476 | SET_ETHTOOL_OPS(ndev, &rionet_ethtool_ops); |
| 477 | |
| 478 | spin_lock_init(&rnet->lock); |
| 479 | spin_lock_init(&rnet->tx_lock); |
| 480 | |
| 481 | rnet->msg_enable = RIONET_DEFAULT_MSGLEVEL; |
| 482 | |
| 483 | rc = register_netdev(ndev); |
| 484 | if (rc != 0) |
| 485 | goto out; |
| 486 | |
| 487 | printk("%s: %s %s Version %s, MAC %pM\n", |
| 488 | ndev->name, |
| 489 | DRV_NAME, |
| 490 | DRV_DESC, |
| 491 | DRV_VERSION, |
| 492 | ndev->dev_addr); |
| 493 | |
| 494 | out: |
| 495 | return rc; |
| 496 | } |
| 497 | |
| 498 | /* |
| 499 | * XXX Make multi-net safe |
| 500 | */ |
| 501 | static int rionet_probe(struct rio_dev *rdev, const struct rio_device_id *id) |
| 502 | { |
| 503 | int rc = -ENODEV; |
| 504 | u32 lpef, lsrc_ops, ldst_ops; |
| 505 | struct rionet_peer *peer; |
| 506 | |
| 507 | /* If local device is not rionet capable, give up quickly */ |
| 508 | if (!rionet_capable) |
| 509 | goto out; |
| 510 | |
| 511 | /* |
| 512 | * First time through, make sure local device is rionet |
| 513 | * capable, setup netdev, and set flags so this is skipped |
| 514 | * on later probes |
| 515 | */ |
| 516 | if (!rionet_check) { |
| 517 | rio_local_read_config_32(rdev->net->hport, RIO_PEF_CAR, &lpef); |
| 518 | rio_local_read_config_32(rdev->net->hport, RIO_SRC_OPS_CAR, |
| 519 | &lsrc_ops); |
| 520 | rio_local_read_config_32(rdev->net->hport, RIO_DST_OPS_CAR, |
| 521 | &ldst_ops); |
| 522 | if (!is_rionet_capable(lpef, lsrc_ops, ldst_ops)) { |
| 523 | printk(KERN_ERR |
| 524 | "%s: local device is not network capable\n", |
| 525 | DRV_NAME); |
| 526 | rionet_check = 1; |
| 527 | rionet_capable = 0; |
| 528 | goto out; |
| 529 | } |
| 530 | |
| 531 | rc = rionet_setup_netdev(rdev->net->hport); |
| 532 | rionet_check = 1; |
| 533 | } |
| 534 | |
| 535 | /* |
| 536 | * If the remote device has mailbox/doorbell capabilities, |
| 537 | * add it to the peer list. |
| 538 | */ |
| 539 | if (dev_rionet_capable(rdev)) { |
| 540 | if (!(peer = kmalloc(sizeof(struct rionet_peer), GFP_KERNEL))) { |
| 541 | rc = -ENOMEM; |
| 542 | goto out; |
| 543 | } |
| 544 | peer->rdev = rdev; |
| 545 | list_add_tail(&peer->node, &rionet_peers); |
| 546 | } |
| 547 | |
| 548 | out: |
| 549 | return rc; |
| 550 | } |
| 551 | |
| 552 | static struct rio_device_id rionet_id_table[] = { |
| 553 | {RIO_DEVICE(RIO_ANY_ID, RIO_ANY_ID)} |
| 554 | }; |
| 555 | |
| 556 | static struct rio_driver rionet_driver = { |
| 557 | .name = "rionet", |
| 558 | .id_table = rionet_id_table, |
| 559 | .probe = rionet_probe, |
| 560 | .remove = rionet_remove, |
| 561 | }; |
| 562 | |
| 563 | static int __init rionet_init(void) |
| 564 | { |
| 565 | return rio_register_driver(&rionet_driver); |
| 566 | } |
| 567 | |
| 568 | static void __exit rionet_exit(void) |
| 569 | { |
| 570 | rio_unregister_driver(&rionet_driver); |
| 571 | } |
| 572 | |
| 573 | module_init(rionet_init); |
| 574 | module_exit(rionet_exit); |