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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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rapidio/rionet: rework to support multiple RIO master ports
Make RIONET driver multi-net safe/capable by introducing per-net lists of RapidIO network peers. Rework registration of network adapters to support all available RIO master port devices. Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Li Yang <leoli@freescale.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexandre Bounine
Linus Torvalds
parent
005842efd1
commit
2fb717ec3e
@ -26,7 +26,7 @@
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#include <linux/ethtool.h>
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#define DRV_NAME "rionet"
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#define DRV_VERSION "0.2"
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#define DRV_VERSION "0.3"
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#define DRV_AUTHOR "Matt Porter <mporter@kernel.crashing.org>"
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#define DRV_DESC "Ethernet over RapidIO"
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@ -47,8 +47,7 @@ MODULE_LICENSE("GPL");
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#define RIONET_TX_RING_SIZE CONFIG_RIONET_TX_SIZE
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#define RIONET_RX_RING_SIZE CONFIG_RIONET_RX_SIZE
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static LIST_HEAD(rionet_peers);
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#define RIONET_MAX_NETS 8
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struct rionet_private {
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struct rio_mport *mport;
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@ -69,17 +68,14 @@ struct rionet_peer {
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struct resource *res;
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};
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static int rionet_check = 0;
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static int rionet_capable = 1;
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struct rionet_net {
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struct net_device *ndev;
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struct list_head peers;
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struct rio_dev **active;
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int nact; /* number of active peers */
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};
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/*
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* This is a fast lookup table for translating TX
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* Ethernet packets into a destination RIO device. It
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* could be made into a hash table to save memory depending
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* on system trade-offs.
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*/
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static struct rio_dev **rionet_active;
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static int nact; /* total number of active rionet peers */
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static struct rionet_net nets[RIONET_MAX_NETS];
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#define is_rionet_capable(src_ops, dst_ops) \
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((src_ops & RIO_SRC_OPS_DATA_MSG) && \
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@ -185,7 +181,7 @@ static int rionet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
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}
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if (is_multicast_ether_addr(eth->h_dest))
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add_num = nact;
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add_num = nets[rnet->mport->id].nact;
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if ((rnet->tx_cnt + add_num) > RIONET_TX_RING_SIZE) {
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netif_stop_queue(ndev);
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@ -197,19 +193,21 @@ static int rionet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
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if (is_multicast_ether_addr(eth->h_dest)) {
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int count = 0;
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for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rnet->mport->sys_size);
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i++)
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if (rionet_active[i]) {
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if (nets[rnet->mport->id].active[i]) {
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rionet_queue_tx_msg(skb, ndev,
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rionet_active[i]);
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nets[rnet->mport->id].active[i]);
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if (count)
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atomic_inc(&skb->users);
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count++;
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}
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} else if (RIONET_MAC_MATCH(eth->h_dest)) {
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destid = RIONET_GET_DESTID(eth->h_dest);
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if (rionet_active[destid])
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rionet_queue_tx_msg(skb, ndev, rionet_active[destid]);
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if (nets[rnet->mport->id].active[destid])
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rionet_queue_tx_msg(skb, ndev,
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nets[rnet->mport->id].active[destid]);
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}
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spin_unlock_irqrestore(&rnet->tx_lock, flags);
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@ -228,19 +226,21 @@ static void rionet_dbell_event(struct rio_mport *mport, void *dev_id, u16 sid, u
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printk(KERN_INFO "%s: doorbell sid %4.4x tid %4.4x info %4.4x",
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DRV_NAME, sid, tid, info);
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if (info == RIONET_DOORBELL_JOIN) {
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if (!rionet_active[sid]) {
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list_for_each_entry(peer, &rionet_peers, node) {
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if (!nets[rnet->mport->id].active[sid]) {
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list_for_each_entry(peer,
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&nets[rnet->mport->id].peers, node) {
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if (peer->rdev->destid == sid) {
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rionet_active[sid] = peer->rdev;
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nact++;
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nets[rnet->mport->id].active[sid] =
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peer->rdev;
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nets[rnet->mport->id].nact++;
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}
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}
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rio_mport_send_doorbell(mport, sid,
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RIONET_DOORBELL_JOIN);
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}
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} else if (info == RIONET_DOORBELL_LEAVE) {
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rionet_active[sid] = NULL;
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nact--;
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nets[rnet->mport->id].active[sid] = NULL;
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nets[rnet->mport->id].nact--;
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} else {
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if (netif_msg_intr(rnet))
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printk(KERN_WARNING "%s: unhandled doorbell\n",
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@ -334,7 +334,8 @@ static int rionet_open(struct net_device *ndev)
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netif_carrier_on(ndev);
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netif_start_queue(ndev);
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list_for_each_entry_safe(peer, tmp, &rionet_peers, node) {
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list_for_each_entry_safe(peer, tmp,
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&nets[rnet->mport->id].peers, node) {
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if (!(peer->res = rio_request_outb_dbell(peer->rdev,
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RIONET_DOORBELL_JOIN,
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RIONET_DOORBELL_LEAVE)))
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@ -359,7 +360,7 @@ static int rionet_close(struct net_device *ndev)
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int i;
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if (netif_msg_ifup(rnet))
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printk(KERN_INFO "%s: close\n", DRV_NAME);
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printk(KERN_INFO "%s: close %s\n", DRV_NAME, ndev->name);
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netif_stop_queue(ndev);
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netif_carrier_off(ndev);
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@ -367,10 +368,11 @@ static int rionet_close(struct net_device *ndev)
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for (i = 0; i < RIONET_RX_RING_SIZE; i++)
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kfree_skb(rnet->rx_skb[i]);
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list_for_each_entry_safe(peer, tmp, &rionet_peers, node) {
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if (rionet_active[peer->rdev->destid]) {
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list_for_each_entry_safe(peer, tmp,
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&nets[rnet->mport->id].peers, node) {
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if (nets[rnet->mport->id].active[peer->rdev->destid]) {
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rio_send_doorbell(peer->rdev, RIONET_DOORBELL_LEAVE);
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rionet_active[peer->rdev->destid] = NULL;
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nets[rnet->mport->id].active[peer->rdev->destid] = NULL;
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}
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rio_release_outb_dbell(peer->rdev, peer->res);
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}
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@ -386,17 +388,21 @@ static int rionet_close(struct net_device *ndev)
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static void rionet_remove(struct rio_dev *rdev)
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{
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struct net_device *ndev = rio_get_drvdata(rdev);
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unsigned char netid = rdev->net->hport->id;
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struct rionet_peer *peer, *tmp;
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free_pages((unsigned long)rionet_active, get_order(sizeof(void *) *
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RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size)));
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unregister_netdev(ndev);
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free_netdev(ndev);
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list_for_each_entry_safe(peer, tmp, &rionet_peers, node) {
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free_pages((unsigned long)nets[netid].active, get_order(sizeof(void *) *
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RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size)));
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nets[netid].active = NULL;
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list_for_each_entry_safe(peer, tmp, &nets[netid].peers, node) {
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list_del(&peer->node);
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kfree(peer);
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}
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free_netdev(ndev);
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}
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static void rionet_get_drvinfo(struct net_device *ndev,
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@ -448,13 +454,13 @@ static int rionet_setup_netdev(struct rio_mport *mport, struct net_device *ndev)
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const size_t rionet_active_bytes = sizeof(void *) *
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RIO_MAX_ROUTE_ENTRIES(mport->sys_size);
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rionet_active = (struct rio_dev **)__get_free_pages(GFP_KERNEL,
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get_order(rionet_active_bytes));
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if (!rionet_active) {
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nets[mport->id].active = (struct rio_dev **)__get_free_pages(GFP_KERNEL,
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get_order(rionet_active_bytes));
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if (!nets[mport->id].active) {
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rc = -ENOMEM;
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goto out;
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}
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memset((void *)rionet_active, 0, rionet_active_bytes);
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memset((void *)nets[mport->id].active, 0, rionet_active_bytes);
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/* Set up private area */
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rnet = netdev_priv(ndev);
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@ -483,61 +489,62 @@ static int rionet_setup_netdev(struct rio_mport *mport, struct net_device *ndev)
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if (rc != 0)
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goto out;
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printk("%s: %s %s Version %s, MAC %pM\n",
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printk(KERN_INFO "%s: %s %s Version %s, MAC %pM, %s\n",
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ndev->name,
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DRV_NAME,
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DRV_DESC,
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DRV_VERSION,
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ndev->dev_addr);
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ndev->dev_addr,
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mport->name);
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out:
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return rc;
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}
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/*
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* XXX Make multi-net safe
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*/
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static unsigned long net_table[RIONET_MAX_NETS/sizeof(unsigned long) + 1];
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static int rionet_probe(struct rio_dev *rdev, const struct rio_device_id *id)
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{
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int rc = -ENODEV;
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u32 lsrc_ops, ldst_ops;
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struct rionet_peer *peer;
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struct net_device *ndev = NULL;
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unsigned char netid = rdev->net->hport->id;
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int oldnet;
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/* If local device is not rionet capable, give up quickly */
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if (!rionet_capable)
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goto out;
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if (netid >= RIONET_MAX_NETS)
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return rc;
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/* Allocate our net_device structure */
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ndev = alloc_etherdev(sizeof(struct rionet_private));
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if (ndev == NULL) {
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rc = -ENOMEM;
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goto out;
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}
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oldnet = test_and_set_bit(netid, net_table);
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/*
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* First time through, make sure local device is rionet
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* capable, setup netdev, and set flags so this is skipped
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* on later probes
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* capable, setup netdev (will be skipped on later probes)
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*/
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if (!rionet_check) {
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if (!oldnet) {
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rio_local_read_config_32(rdev->net->hport, RIO_SRC_OPS_CAR,
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&lsrc_ops);
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rio_local_read_config_32(rdev->net->hport, RIO_DST_OPS_CAR,
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&ldst_ops);
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if (!is_rionet_capable(lsrc_ops, ldst_ops)) {
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printk(KERN_ERR
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"%s: local device is not network capable\n",
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DRV_NAME);
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rionet_check = 1;
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rionet_capable = 0;
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"%s: local device %s is not network capable\n",
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DRV_NAME, rdev->net->hport->name);
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goto out;
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}
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/* Allocate our net_device structure */
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ndev = alloc_etherdev(sizeof(struct rionet_private));
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if (ndev == NULL) {
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rc = -ENOMEM;
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goto out;
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}
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nets[netid].ndev = ndev;
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rc = rionet_setup_netdev(rdev->net->hport, ndev);
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rionet_check = 1;
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nact = 0;
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}
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INIT_LIST_HEAD(&nets[netid].peers);
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nets[netid].nact = 0;
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} else if (nets[netid].ndev == NULL)
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goto out;
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/*
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* If the remote device has mailbox/doorbell capabilities,
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@ -549,10 +556,10 @@ static int rionet_probe(struct rio_dev *rdev, const struct rio_device_id *id)
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goto out;
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}
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peer->rdev = rdev;
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list_add_tail(&peer->node, &rionet_peers);
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list_add_tail(&peer->node, &nets[netid].peers);
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}
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rio_set_drvdata(rdev, ndev);
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rio_set_drvdata(rdev, nets[netid].ndev);
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out:
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return rc;
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