Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 19 | #include <linux/slab.h> |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 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 | |
| 28 | #define DRV_NAME "rionet" |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 29 | #define DRV_VERSION "0.3" |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 30 | #define DRV_AUTHOR "Matt Porter <mporter@kernel.crashing.org>" |
| 31 | #define DRV_DESC "Ethernet over RapidIO" |
| 32 | |
| 33 | MODULE_AUTHOR(DRV_AUTHOR); |
| 34 | MODULE_DESCRIPTION(DRV_DESC); |
| 35 | MODULE_LICENSE("GPL"); |
| 36 | |
| 37 | #define RIONET_DEFAULT_MSGLEVEL \ |
| 38 | (NETIF_MSG_DRV | \ |
| 39 | NETIF_MSG_LINK | \ |
| 40 | NETIF_MSG_RX_ERR | \ |
| 41 | NETIF_MSG_TX_ERR) |
| 42 | |
| 43 | #define RIONET_DOORBELL_JOIN 0x1000 |
| 44 | #define RIONET_DOORBELL_LEAVE 0x1001 |
| 45 | |
| 46 | #define RIONET_MAILBOX 0 |
| 47 | |
| 48 | #define RIONET_TX_RING_SIZE CONFIG_RIONET_TX_SIZE |
| 49 | #define RIONET_RX_RING_SIZE CONFIG_RIONET_RX_SIZE |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 50 | #define RIONET_MAX_NETS 8 |
Aurelien Jacquiot | 92444bb | 2016-03-22 14:25:45 -0700 | [diff] [blame^] | 51 | #define RIONET_MSG_SIZE RIO_MAX_MSG_SIZE |
| 52 | #define RIONET_MAX_MTU (RIONET_MSG_SIZE - ETH_HLEN) |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 53 | |
| 54 | struct rionet_private { |
| 55 | struct rio_mport *mport; |
| 56 | struct sk_buff *rx_skb[RIONET_RX_RING_SIZE]; |
| 57 | struct sk_buff *tx_skb[RIONET_TX_RING_SIZE]; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 58 | int rx_slot; |
| 59 | int tx_slot; |
| 60 | int tx_cnt; |
| 61 | int ack_slot; |
| 62 | spinlock_t lock; |
| 63 | spinlock_t tx_lock; |
| 64 | u32 msg_enable; |
| 65 | }; |
| 66 | |
| 67 | struct rionet_peer { |
| 68 | struct list_head node; |
| 69 | struct rio_dev *rdev; |
| 70 | struct resource *res; |
| 71 | }; |
| 72 | |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 73 | struct rionet_net { |
| 74 | struct net_device *ndev; |
| 75 | struct list_head peers; |
| 76 | struct rio_dev **active; |
| 77 | int nact; /* number of active peers */ |
| 78 | }; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 79 | |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 80 | static struct rionet_net nets[RIONET_MAX_NETS]; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 81 | |
Alexandre Bounine | 284fb68 | 2011-08-25 15:59:13 -0700 | [diff] [blame] | 82 | #define is_rionet_capable(src_ops, dst_ops) \ |
| 83 | ((src_ops & RIO_SRC_OPS_DATA_MSG) && \ |
| 84 | (dst_ops & RIO_DST_OPS_DATA_MSG) && \ |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 85 | (src_ops & RIO_SRC_OPS_DOORBELL) && \ |
| 86 | (dst_ops & RIO_DST_OPS_DOORBELL)) |
| 87 | #define dev_rionet_capable(dev) \ |
Alexandre Bounine | 284fb68 | 2011-08-25 15:59:13 -0700 | [diff] [blame] | 88 | is_rionet_capable(dev->src_ops, dev->dst_ops) |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 89 | |
Alexandre Bounine | e0c87bd | 2011-11-02 13:39:15 -0700 | [diff] [blame] | 90 | #define RIONET_MAC_MATCH(x) (!memcmp((x), "\00\01\00\01", 4)) |
| 91 | #define RIONET_GET_DESTID(x) ((*((u8 *)x + 4) << 8) | *((u8 *)x + 5)) |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 92 | |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 93 | static int rionet_rx_clean(struct net_device *ndev) |
| 94 | { |
| 95 | int i; |
| 96 | int error = 0; |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 97 | struct rionet_private *rnet = netdev_priv(ndev); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 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); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 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) { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 116 | ndev->stats.rx_dropped++; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 117 | } else { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 118 | ndev->stats.rx_packets++; |
| 119 | ndev->stats.rx_bytes += RIO_MAX_MSG_SIZE; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 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; |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 130 | struct rionet_private *rnet = netdev_priv(ndev); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 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 | { |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 149 | struct rionet_private *rnet = netdev_priv(ndev); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 150 | |
| 151 | rio_add_outb_message(rnet->mport, rdev, 0, skb->data, skb->len); |
| 152 | rnet->tx_skb[rnet->tx_slot] = skb; |
| 153 | |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 154 | ndev->stats.tx_packets++; |
| 155 | ndev->stats.tx_bytes += skb->len; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 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)) |
David S. Miller | 8df8a47 | 2011-05-22 20:35:54 -0400 | [diff] [blame] | 164 | printk(KERN_INFO "%s: queued skb len %8.8x\n", DRV_NAME, |
| 165 | skb->len); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 166 | |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | static int rionet_start_xmit(struct sk_buff *skb, struct net_device *ndev) |
| 171 | { |
| 172 | int i; |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 173 | struct rionet_private *rnet = netdev_priv(ndev); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 174 | struct ethhdr *eth = (struct ethhdr *)skb->data; |
| 175 | u16 destid; |
| 176 | unsigned long flags; |
Alexandre Bounine | 7c4a610 | 2012-10-04 17:15:48 -0700 | [diff] [blame] | 177 | int add_num = 1; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 178 | |
| 179 | local_irq_save(flags); |
| 180 | if (!spin_trylock(&rnet->tx_lock)) { |
| 181 | local_irq_restore(flags); |
| 182 | return NETDEV_TX_LOCKED; |
| 183 | } |
| 184 | |
Alexandre Bounine | 7c4a610 | 2012-10-04 17:15:48 -0700 | [diff] [blame] | 185 | if (is_multicast_ether_addr(eth->h_dest)) |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 186 | add_num = nets[rnet->mport->id].nact; |
Alexandre Bounine | 7c4a610 | 2012-10-04 17:15:48 -0700 | [diff] [blame] | 187 | |
| 188 | if ((rnet->tx_cnt + add_num) > RIONET_TX_RING_SIZE) { |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 189 | netif_stop_queue(ndev); |
| 190 | spin_unlock_irqrestore(&rnet->tx_lock, flags); |
| 191 | printk(KERN_ERR "%s: BUG! Tx Ring full when queue awake!\n", |
| 192 | ndev->name); |
| 193 | return NETDEV_TX_BUSY; |
| 194 | } |
| 195 | |
Tobias Klauser | abfc89c | 2011-07-03 23:54:54 +0000 | [diff] [blame] | 196 | if (is_multicast_ether_addr(eth->h_dest)) { |
Alexandre Bounine | 7c4a610 | 2012-10-04 17:15:48 -0700 | [diff] [blame] | 197 | int count = 0; |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 198 | |
Zhang Wei | e042323 | 2008-04-18 13:33:42 -0700 | [diff] [blame] | 199 | for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rnet->mport->sys_size); |
| 200 | i++) |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 201 | if (nets[rnet->mport->id].active[i]) { |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 202 | rionet_queue_tx_msg(skb, ndev, |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 203 | nets[rnet->mport->id].active[i]); |
Alexandre Bounine | 7c4a610 | 2012-10-04 17:15:48 -0700 | [diff] [blame] | 204 | if (count) |
| 205 | atomic_inc(&skb->users); |
| 206 | count++; |
| 207 | } |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 208 | } else if (RIONET_MAC_MATCH(eth->h_dest)) { |
| 209 | destid = RIONET_GET_DESTID(eth->h_dest); |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 210 | if (nets[rnet->mport->id].active[destid]) |
| 211 | rionet_queue_tx_msg(skb, ndev, |
| 212 | nets[rnet->mport->id].active[destid]); |
Alexandre Bounine | e6161d6 | 2013-07-03 15:08:52 -0700 | [diff] [blame] | 213 | else { |
| 214 | /* |
| 215 | * If the target device was removed from the list of |
| 216 | * active peers but we still have TX packets targeting |
| 217 | * it just report sending a packet to the target |
| 218 | * (without actual packet transfer). |
| 219 | */ |
| 220 | dev_kfree_skb_any(skb); |
| 221 | ndev->stats.tx_packets++; |
| 222 | ndev->stats.tx_bytes += skb->len; |
| 223 | } |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | spin_unlock_irqrestore(&rnet->tx_lock, flags); |
| 227 | |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 228 | return NETDEV_TX_OK; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 229 | } |
| 230 | |
| 231 | static void rionet_dbell_event(struct rio_mport *mport, void *dev_id, u16 sid, u16 tid, |
| 232 | u16 info) |
| 233 | { |
| 234 | struct net_device *ndev = dev_id; |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 235 | struct rionet_private *rnet = netdev_priv(ndev); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 236 | struct rionet_peer *peer; |
| 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) { |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 242 | if (!nets[rnet->mport->id].active[sid]) { |
| 243 | list_for_each_entry(peer, |
| 244 | &nets[rnet->mport->id].peers, node) { |
Alexandre Bounine | 7c4a610 | 2012-10-04 17:15:48 -0700 | [diff] [blame] | 245 | if (peer->rdev->destid == sid) { |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 246 | nets[rnet->mport->id].active[sid] = |
| 247 | peer->rdev; |
| 248 | nets[rnet->mport->id].nact++; |
Alexandre Bounine | 7c4a610 | 2012-10-04 17:15:48 -0700 | [diff] [blame] | 249 | } |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 250 | } |
| 251 | rio_mport_send_doorbell(mport, sid, |
| 252 | RIONET_DOORBELL_JOIN); |
| 253 | } |
| 254 | } else if (info == RIONET_DOORBELL_LEAVE) { |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 255 | nets[rnet->mport->id].active[sid] = NULL; |
| 256 | nets[rnet->mport->id].nact--; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 257 | } else { |
| 258 | if (netif_msg_intr(rnet)) |
| 259 | printk(KERN_WARNING "%s: unhandled doorbell\n", |
| 260 | DRV_NAME); |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | static void rionet_inb_msg_event(struct rio_mport *mport, void *dev_id, int mbox, int slot) |
| 265 | { |
| 266 | int n; |
| 267 | struct net_device *ndev = dev_id; |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 268 | struct rionet_private *rnet = netdev_priv(ndev); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 269 | |
| 270 | if (netif_msg_intr(rnet)) |
| 271 | printk(KERN_INFO "%s: inbound message event, mbox %d slot %d\n", |
| 272 | DRV_NAME, mbox, slot); |
| 273 | |
| 274 | spin_lock(&rnet->lock); |
| 275 | if ((n = rionet_rx_clean(ndev)) != rnet->rx_slot) |
| 276 | rionet_rx_fill(ndev, n); |
| 277 | spin_unlock(&rnet->lock); |
| 278 | } |
| 279 | |
| 280 | static void rionet_outb_msg_event(struct rio_mport *mport, void *dev_id, int mbox, int slot) |
| 281 | { |
| 282 | struct net_device *ndev = dev_id; |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 283 | struct rionet_private *rnet = netdev_priv(ndev); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 284 | |
Aurelien Jacquiot | 3691597 | 2016-03-22 14:25:42 -0700 | [diff] [blame] | 285 | spin_lock(&rnet->tx_lock); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 286 | |
| 287 | if (netif_msg_intr(rnet)) |
| 288 | printk(KERN_INFO |
| 289 | "%s: outbound message event, mbox %d slot %d\n", |
| 290 | DRV_NAME, mbox, slot); |
| 291 | |
| 292 | while (rnet->tx_cnt && (rnet->ack_slot != slot)) { |
| 293 | /* dma unmap single */ |
| 294 | dev_kfree_skb_irq(rnet->tx_skb[rnet->ack_slot]); |
| 295 | rnet->tx_skb[rnet->ack_slot] = NULL; |
| 296 | ++rnet->ack_slot; |
| 297 | rnet->ack_slot &= (RIONET_TX_RING_SIZE - 1); |
| 298 | rnet->tx_cnt--; |
| 299 | } |
| 300 | |
| 301 | if (rnet->tx_cnt < RIONET_TX_RING_SIZE) |
| 302 | netif_wake_queue(ndev); |
| 303 | |
Aurelien Jacquiot | 3691597 | 2016-03-22 14:25:42 -0700 | [diff] [blame] | 304 | spin_unlock(&rnet->tx_lock); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 305 | } |
| 306 | |
| 307 | static int rionet_open(struct net_device *ndev) |
| 308 | { |
| 309 | int i, rc = 0; |
| 310 | struct rionet_peer *peer, *tmp; |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 311 | struct rionet_private *rnet = netdev_priv(ndev); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 312 | |
| 313 | if (netif_msg_ifup(rnet)) |
| 314 | printk(KERN_INFO "%s: open\n", DRV_NAME); |
| 315 | |
| 316 | if ((rc = rio_request_inb_dbell(rnet->mport, |
| 317 | (void *)ndev, |
| 318 | RIONET_DOORBELL_JOIN, |
| 319 | RIONET_DOORBELL_LEAVE, |
| 320 | rionet_dbell_event)) < 0) |
| 321 | goto out; |
| 322 | |
| 323 | if ((rc = rio_request_inb_mbox(rnet->mport, |
| 324 | (void *)ndev, |
| 325 | RIONET_MAILBOX, |
| 326 | RIONET_RX_RING_SIZE, |
| 327 | rionet_inb_msg_event)) < 0) |
| 328 | goto out; |
| 329 | |
| 330 | if ((rc = rio_request_outb_mbox(rnet->mport, |
| 331 | (void *)ndev, |
| 332 | RIONET_MAILBOX, |
| 333 | RIONET_TX_RING_SIZE, |
| 334 | rionet_outb_msg_event)) < 0) |
| 335 | goto out; |
| 336 | |
| 337 | /* Initialize inbound message ring */ |
| 338 | for (i = 0; i < RIONET_RX_RING_SIZE; i++) |
| 339 | rnet->rx_skb[i] = NULL; |
| 340 | rnet->rx_slot = 0; |
| 341 | rionet_rx_fill(ndev, 0); |
| 342 | |
| 343 | rnet->tx_slot = 0; |
| 344 | rnet->tx_cnt = 0; |
| 345 | rnet->ack_slot = 0; |
| 346 | |
| 347 | netif_carrier_on(ndev); |
| 348 | netif_start_queue(ndev); |
| 349 | |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 350 | list_for_each_entry_safe(peer, tmp, |
| 351 | &nets[rnet->mport->id].peers, node) { |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 352 | if (!(peer->res = rio_request_outb_dbell(peer->rdev, |
| 353 | RIONET_DOORBELL_JOIN, |
| 354 | RIONET_DOORBELL_LEAVE))) |
| 355 | { |
| 356 | printk(KERN_ERR "%s: error requesting doorbells\n", |
| 357 | DRV_NAME); |
| 358 | continue; |
| 359 | } |
| 360 | |
Alexandre Bounine | 284fb68 | 2011-08-25 15:59:13 -0700 | [diff] [blame] | 361 | /* Send a join message */ |
| 362 | rio_send_doorbell(peer->rdev, RIONET_DOORBELL_JOIN); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 363 | } |
| 364 | |
| 365 | out: |
| 366 | return rc; |
| 367 | } |
| 368 | |
| 369 | static int rionet_close(struct net_device *ndev) |
| 370 | { |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 371 | struct rionet_private *rnet = netdev_priv(ndev); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 372 | struct rionet_peer *peer, *tmp; |
| 373 | int i; |
| 374 | |
| 375 | if (netif_msg_ifup(rnet)) |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 376 | printk(KERN_INFO "%s: close %s\n", DRV_NAME, ndev->name); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 377 | |
| 378 | netif_stop_queue(ndev); |
| 379 | netif_carrier_off(ndev); |
| 380 | |
| 381 | for (i = 0; i < RIONET_RX_RING_SIZE; i++) |
Wei Yongjun | aaff1e1 | 2009-02-25 00:18:12 +0000 | [diff] [blame] | 382 | kfree_skb(rnet->rx_skb[i]); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 383 | |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 384 | list_for_each_entry_safe(peer, tmp, |
| 385 | &nets[rnet->mport->id].peers, node) { |
| 386 | if (nets[rnet->mport->id].active[peer->rdev->destid]) { |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 387 | rio_send_doorbell(peer->rdev, RIONET_DOORBELL_LEAVE); |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 388 | nets[rnet->mport->id].active[peer->rdev->destid] = NULL; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 389 | } |
| 390 | rio_release_outb_dbell(peer->rdev, peer->res); |
| 391 | } |
| 392 | |
| 393 | rio_release_inb_dbell(rnet->mport, RIONET_DOORBELL_JOIN, |
| 394 | RIONET_DOORBELL_LEAVE); |
| 395 | rio_release_inb_mbox(rnet->mport, RIONET_MAILBOX); |
| 396 | rio_release_outb_mbox(rnet->mport, RIONET_MAILBOX); |
| 397 | |
| 398 | return 0; |
| 399 | } |
| 400 | |
Viresh Kumar | 71db87b | 2015-07-30 15:04:01 +0530 | [diff] [blame] | 401 | static void rionet_remove_dev(struct device *dev, struct subsys_interface *sif) |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 402 | { |
Alexandre Bounine | e6161d6 | 2013-07-03 15:08:52 -0700 | [diff] [blame] | 403 | struct rio_dev *rdev = to_rio_dev(dev); |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 404 | unsigned char netid = rdev->net->hport->id; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 405 | struct rionet_peer *peer, *tmp; |
| 406 | |
Alexandre Bounine | e6161d6 | 2013-07-03 15:08:52 -0700 | [diff] [blame] | 407 | if (dev_rionet_capable(rdev)) { |
| 408 | list_for_each_entry_safe(peer, tmp, &nets[netid].peers, node) { |
| 409 | if (peer->rdev == rdev) { |
| 410 | if (nets[netid].active[rdev->destid]) { |
| 411 | nets[netid].active[rdev->destid] = NULL; |
| 412 | nets[netid].nact--; |
| 413 | } |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 414 | |
Alexandre Bounine | e6161d6 | 2013-07-03 15:08:52 -0700 | [diff] [blame] | 415 | list_del(&peer->node); |
| 416 | kfree(peer); |
| 417 | break; |
| 418 | } |
| 419 | } |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 420 | } |
| 421 | } |
| 422 | |
| 423 | static void rionet_get_drvinfo(struct net_device *ndev, |
| 424 | struct ethtool_drvinfo *info) |
| 425 | { |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 426 | struct rionet_private *rnet = netdev_priv(ndev); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 427 | |
Jiri Pirko | 7826d43 | 2013-01-06 00:44:26 +0000 | [diff] [blame] | 428 | strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); |
| 429 | strlcpy(info->version, DRV_VERSION, sizeof(info->version)); |
| 430 | strlcpy(info->fw_version, "n/a", sizeof(info->fw_version)); |
| 431 | strlcpy(info->bus_info, rnet->mport->name, sizeof(info->bus_info)); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 432 | } |
| 433 | |
| 434 | static u32 rionet_get_msglevel(struct net_device *ndev) |
| 435 | { |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 436 | struct rionet_private *rnet = netdev_priv(ndev); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 437 | |
| 438 | return rnet->msg_enable; |
| 439 | } |
| 440 | |
| 441 | static void rionet_set_msglevel(struct net_device *ndev, u32 value) |
| 442 | { |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 443 | struct rionet_private *rnet = netdev_priv(ndev); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 444 | |
| 445 | rnet->msg_enable = value; |
| 446 | } |
| 447 | |
Aurelien Jacquiot | 92444bb | 2016-03-22 14:25:45 -0700 | [diff] [blame^] | 448 | static int rionet_change_mtu(struct net_device *ndev, int new_mtu) |
| 449 | { |
| 450 | if ((new_mtu < 68) || (new_mtu > RIONET_MAX_MTU)) { |
| 451 | printk(KERN_ERR "%s: Invalid MTU size %d\n", |
| 452 | ndev->name, new_mtu); |
| 453 | return -EINVAL; |
| 454 | } |
| 455 | ndev->mtu = new_mtu; |
| 456 | return 0; |
| 457 | } |
| 458 | |
Jeff Garzik | 7282d49 | 2006-09-13 14:30:00 -0400 | [diff] [blame] | 459 | static const struct ethtool_ops rionet_ethtool_ops = { |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 460 | .get_drvinfo = rionet_get_drvinfo, |
| 461 | .get_msglevel = rionet_get_msglevel, |
| 462 | .set_msglevel = rionet_set_msglevel, |
| 463 | .get_link = ethtool_op_get_link, |
| 464 | }; |
| 465 | |
Alexander Beregalov | a33a2bb | 2009-04-15 12:52:56 +0000 | [diff] [blame] | 466 | static const struct net_device_ops rionet_netdev_ops = { |
| 467 | .ndo_open = rionet_open, |
| 468 | .ndo_stop = rionet_close, |
| 469 | .ndo_start_xmit = rionet_start_xmit, |
Aurelien Jacquiot | 92444bb | 2016-03-22 14:25:45 -0700 | [diff] [blame^] | 470 | .ndo_change_mtu = rionet_change_mtu, |
Alexander Beregalov | a33a2bb | 2009-04-15 12:52:56 +0000 | [diff] [blame] | 471 | .ndo_validate_addr = eth_validate_addr, |
| 472 | .ndo_set_mac_address = eth_mac_addr, |
| 473 | }; |
| 474 | |
Yinglin Luan | 55caa92 | 2011-06-25 18:12:12 +0000 | [diff] [blame] | 475 | static int rionet_setup_netdev(struct rio_mport *mport, struct net_device *ndev) |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 476 | { |
| 477 | int rc = 0; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 478 | struct rionet_private *rnet; |
| 479 | u16 device_id; |
Akinobu Mita | acc6563 | 2012-03-30 01:01:46 +0000 | [diff] [blame] | 480 | const size_t rionet_active_bytes = sizeof(void *) * |
| 481 | RIO_MAX_ROUTE_ENTRIES(mport->sys_size); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 482 | |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 483 | nets[mport->id].active = (struct rio_dev **)__get_free_pages(GFP_KERNEL, |
| 484 | get_order(rionet_active_bytes)); |
| 485 | if (!nets[mport->id].active) { |
Zhang Wei | e042323 | 2008-04-18 13:33:42 -0700 | [diff] [blame] | 486 | rc = -ENOMEM; |
| 487 | goto out; |
| 488 | } |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 489 | memset((void *)nets[mport->id].active, 0, rionet_active_bytes); |
Zhang Wei | e042323 | 2008-04-18 13:33:42 -0700 | [diff] [blame] | 490 | |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 491 | /* Set up private area */ |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 492 | rnet = netdev_priv(ndev); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 493 | rnet->mport = mport; |
| 494 | |
| 495 | /* Set the default MAC address */ |
| 496 | device_id = rio_local_get_device_id(mport); |
| 497 | ndev->dev_addr[0] = 0x00; |
| 498 | ndev->dev_addr[1] = 0x01; |
| 499 | ndev->dev_addr[2] = 0x00; |
| 500 | ndev->dev_addr[3] = 0x01; |
| 501 | ndev->dev_addr[4] = device_id >> 8; |
| 502 | ndev->dev_addr[5] = device_id & 0xff; |
| 503 | |
Alexander Beregalov | a33a2bb | 2009-04-15 12:52:56 +0000 | [diff] [blame] | 504 | ndev->netdev_ops = &rionet_netdev_ops; |
Aurelien Jacquiot | 92444bb | 2016-03-22 14:25:45 -0700 | [diff] [blame^] | 505 | ndev->mtu = RIONET_MAX_MTU; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 506 | ndev->features = NETIF_F_LLTX; |
Alexandre Bounine | 2aaf308 | 2014-04-07 15:38:56 -0700 | [diff] [blame] | 507 | SET_NETDEV_DEV(ndev, &mport->dev); |
Wilfried Klaebe | 7ad24ea | 2014-05-11 00:12:32 +0000 | [diff] [blame] | 508 | ndev->ethtool_ops = &rionet_ethtool_ops; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 509 | |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 510 | spin_lock_init(&rnet->lock); |
| 511 | spin_lock_init(&rnet->tx_lock); |
| 512 | |
| 513 | rnet->msg_enable = RIONET_DEFAULT_MSGLEVEL; |
| 514 | |
| 515 | rc = register_netdev(ndev); |
| 516 | if (rc != 0) |
| 517 | goto out; |
| 518 | |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 519 | printk(KERN_INFO "%s: %s %s Version %s, MAC %pM, %s\n", |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 520 | ndev->name, |
| 521 | DRV_NAME, |
| 522 | DRV_DESC, |
| 523 | DRV_VERSION, |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 524 | ndev->dev_addr, |
| 525 | mport->name); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 526 | |
| 527 | out: |
| 528 | return rc; |
| 529 | } |
| 530 | |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 531 | static unsigned long net_table[RIONET_MAX_NETS/sizeof(unsigned long) + 1]; |
| 532 | |
Alexandre Bounine | e6161d6 | 2013-07-03 15:08:52 -0700 | [diff] [blame] | 533 | static int rionet_add_dev(struct device *dev, struct subsys_interface *sif) |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 534 | { |
| 535 | int rc = -ENODEV; |
Alexandre Bounine | 284fb68 | 2011-08-25 15:59:13 -0700 | [diff] [blame] | 536 | u32 lsrc_ops, ldst_ops; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 537 | struct rionet_peer *peer; |
Yinglin Luan | 55caa92 | 2011-06-25 18:12:12 +0000 | [diff] [blame] | 538 | struct net_device *ndev = NULL; |
Alexandre Bounine | e6161d6 | 2013-07-03 15:08:52 -0700 | [diff] [blame] | 539 | struct rio_dev *rdev = to_rio_dev(dev); |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 540 | unsigned char netid = rdev->net->hport->id; |
| 541 | int oldnet; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 542 | |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 543 | if (netid >= RIONET_MAX_NETS) |
| 544 | return rc; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 545 | |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 546 | oldnet = test_and_set_bit(netid, net_table); |
Yinglin Luan | 55caa92 | 2011-06-25 18:12:12 +0000 | [diff] [blame] | 547 | |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 548 | /* |
Alexandre Bounine | e6161d6 | 2013-07-03 15:08:52 -0700 | [diff] [blame] | 549 | * If first time through this net, make sure local device is rionet |
| 550 | * capable and setup netdev (this step will be skipped in later probes |
| 551 | * on the same net). |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 552 | */ |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 553 | if (!oldnet) { |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 554 | rio_local_read_config_32(rdev->net->hport, RIO_SRC_OPS_CAR, |
| 555 | &lsrc_ops); |
| 556 | rio_local_read_config_32(rdev->net->hport, RIO_DST_OPS_CAR, |
| 557 | &ldst_ops); |
Alexandre Bounine | 284fb68 | 2011-08-25 15:59:13 -0700 | [diff] [blame] | 558 | if (!is_rionet_capable(lsrc_ops, ldst_ops)) { |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 559 | printk(KERN_ERR |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 560 | "%s: local device %s is not network capable\n", |
| 561 | DRV_NAME, rdev->net->hport->name); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 562 | goto out; |
| 563 | } |
| 564 | |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 565 | /* Allocate our net_device structure */ |
| 566 | ndev = alloc_etherdev(sizeof(struct rionet_private)); |
| 567 | if (ndev == NULL) { |
| 568 | rc = -ENOMEM; |
| 569 | goto out; |
| 570 | } |
| 571 | nets[netid].ndev = ndev; |
Yinglin Luan | 55caa92 | 2011-06-25 18:12:12 +0000 | [diff] [blame] | 572 | rc = rionet_setup_netdev(rdev->net->hport, ndev); |
Alexandre Bounine | e6161d6 | 2013-07-03 15:08:52 -0700 | [diff] [blame] | 573 | if (rc) { |
| 574 | printk(KERN_ERR "%s: failed to setup netdev (rc=%d)\n", |
| 575 | DRV_NAME, rc); |
| 576 | goto out; |
| 577 | } |
| 578 | |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 579 | INIT_LIST_HEAD(&nets[netid].peers); |
| 580 | nets[netid].nact = 0; |
| 581 | } else if (nets[netid].ndev == NULL) |
| 582 | goto out; |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 583 | |
| 584 | /* |
| 585 | * If the remote device has mailbox/doorbell capabilities, |
| 586 | * add it to the peer list. |
| 587 | */ |
| 588 | if (dev_rionet_capable(rdev)) { |
| 589 | if (!(peer = kmalloc(sizeof(struct rionet_peer), GFP_KERNEL))) { |
| 590 | rc = -ENOMEM; |
| 591 | goto out; |
| 592 | } |
| 593 | peer->rdev = rdev; |
Alexandre Bounine | 2fb717e | 2012-10-04 17:16:11 -0700 | [diff] [blame] | 594 | list_add_tail(&peer->node, &nets[netid].peers); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 595 | } |
| 596 | |
Alexandre Bounine | e6161d6 | 2013-07-03 15:08:52 -0700 | [diff] [blame] | 597 | return 0; |
| 598 | out: |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 599 | return rc; |
| 600 | } |
| 601 | |
Alexandre Bounine | e6161d6 | 2013-07-03 15:08:52 -0700 | [diff] [blame] | 602 | #ifdef MODULE |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 603 | static struct rio_device_id rionet_id_table[] = { |
Alexandre Bounine | e6161d6 | 2013-07-03 15:08:52 -0700 | [diff] [blame] | 604 | {RIO_DEVICE(RIO_ANY_ID, RIO_ANY_ID)}, |
| 605 | { 0, } /* terminate list */ |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 606 | }; |
| 607 | |
Alexandre Bounine | e6161d6 | 2013-07-03 15:08:52 -0700 | [diff] [blame] | 608 | MODULE_DEVICE_TABLE(rapidio, rionet_id_table); |
| 609 | #endif |
| 610 | |
| 611 | static struct subsys_interface rionet_interface = { |
| 612 | .name = "rionet", |
| 613 | .subsys = &rio_bus_type, |
| 614 | .add_dev = rionet_add_dev, |
| 615 | .remove_dev = rionet_remove_dev, |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 616 | }; |
| 617 | |
| 618 | static int __init rionet_init(void) |
| 619 | { |
Alexandre Bounine | e6161d6 | 2013-07-03 15:08:52 -0700 | [diff] [blame] | 620 | return subsys_interface_register(&rionet_interface); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 621 | } |
| 622 | |
| 623 | static void __exit rionet_exit(void) |
| 624 | { |
Alexandre Bounine | e6161d6 | 2013-07-03 15:08:52 -0700 | [diff] [blame] | 625 | struct rionet_private *rnet; |
| 626 | struct net_device *ndev; |
| 627 | struct rionet_peer *peer, *tmp; |
| 628 | int i; |
| 629 | |
| 630 | for (i = 0; i < RIONET_MAX_NETS; i++) { |
| 631 | if (nets[i].ndev != NULL) { |
| 632 | ndev = nets[i].ndev; |
| 633 | rnet = netdev_priv(ndev); |
| 634 | unregister_netdev(ndev); |
| 635 | |
| 636 | list_for_each_entry_safe(peer, |
| 637 | tmp, &nets[i].peers, node) { |
| 638 | list_del(&peer->node); |
| 639 | kfree(peer); |
| 640 | } |
| 641 | |
| 642 | free_pages((unsigned long)nets[i].active, |
| 643 | get_order(sizeof(void *) * |
| 644 | RIO_MAX_ROUTE_ENTRIES(rnet->mport->sys_size))); |
| 645 | nets[i].active = NULL; |
| 646 | |
| 647 | free_netdev(ndev); |
| 648 | } |
| 649 | } |
| 650 | |
| 651 | subsys_interface_unregister(&rionet_interface); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 652 | } |
| 653 | |
Alexandre Bounine | 2f80998 | 2011-03-23 16:43:04 -0700 | [diff] [blame] | 654 | late_initcall(rionet_init); |
Matt Porter | f89efd5 | 2005-09-09 12:10:10 -0700 | [diff] [blame] | 655 | module_exit(rionet_exit); |