[PATCH 4/5] rapidio/rionet: rework to support multiple RIO master ports
Alexandre Bounine
alexandre.bounine at idt.com
Thu Oct 4 05:18:42 EST 2012
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 at idt.com>
Cc: Matt Porter <mporter at kernel.crashing.org>
Cc: Li Yang <leoli at freescale.com>
Cc: David S. Miller <davem at davemloft.net>
---
drivers/net/rionet.c | 133 ++++++++++++++++++++++++++------------------------
1 files changed, 70 insertions(+), 63 deletions(-)
diff --git a/drivers/net/rionet.c b/drivers/net/rionet.c
index 1470d3e..d8b9b1e 100644
--- a/drivers/net/rionet.c
+++ b/drivers/net/rionet.c
@@ -26,7 +26,7 @@
#include <linux/ethtool.h>
#define DRV_NAME "rionet"
-#define DRV_VERSION "0.2"
+#define DRV_VERSION "0.3"
#define DRV_AUTHOR "Matt Porter <mporter at kernel.crashing.org>"
#define DRV_DESC "Ethernet over RapidIO"
@@ -47,8 +47,7 @@ MODULE_LICENSE("GPL");
#define RIONET_TX_RING_SIZE CONFIG_RIONET_TX_SIZE
#define RIONET_RX_RING_SIZE CONFIG_RIONET_RX_SIZE
-
-static LIST_HEAD(rionet_peers);
+#define RIONET_MAX_NETS 8
struct rionet_private {
struct rio_mport *mport;
@@ -69,17 +68,14 @@ struct rionet_peer {
struct resource *res;
};
-static int rionet_check = 0;
-static int rionet_capable = 1;
+struct rionet_net {
+ struct net_device *ndev;
+ struct list_head peers;
+ struct rio_dev **active;
+ int nact; /* number of active peers */
+};
-/*
- * This is a fast lookup table for translating TX
- * Ethernet packets into a destination RIO device. It
- * could be made into a hash table to save memory depending
- * on system trade-offs.
- */
-static struct rio_dev **rionet_active;
-static int nact; /* total number of active rionet peers */
+static struct rionet_net nets[RIONET_MAX_NETS];
#define is_rionet_capable(src_ops, dst_ops) \
((src_ops & RIO_SRC_OPS_DATA_MSG) && \
@@ -185,7 +181,7 @@ static int rionet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
}
if (is_multicast_ether_addr(eth->h_dest))
- add_num = nact;
+ add_num = nets[rnet->mport->id].nact;
if ((rnet->tx_cnt + add_num) > RIONET_TX_RING_SIZE) {
netif_stop_queue(ndev);
@@ -197,19 +193,21 @@ static int rionet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
if (is_multicast_ether_addr(eth->h_dest)) {
int count = 0;
+
for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rnet->mport->sys_size);
i++)
- if (rionet_active[i]) {
+ if (nets[rnet->mport->id].active[i]) {
rionet_queue_tx_msg(skb, ndev,
- rionet_active[i]);
+ nets[rnet->mport->id].active[i]);
if (count)
atomic_inc(&skb->users);
count++;
}
} else if (RIONET_MAC_MATCH(eth->h_dest)) {
destid = RIONET_GET_DESTID(eth->h_dest);
- if (rionet_active[destid])
- rionet_queue_tx_msg(skb, ndev, rionet_active[destid]);
+ if (nets[rnet->mport->id].active[destid])
+ rionet_queue_tx_msg(skb, ndev,
+ nets[rnet->mport->id].active[destid]);
}
spin_unlock_irqrestore(&rnet->tx_lock, flags);
@@ -228,19 +226,21 @@ static void rionet_dbell_event(struct rio_mport *mport, void *dev_id, u16 sid, u
printk(KERN_INFO "%s: doorbell sid %4.4x tid %4.4x info %4.4x",
DRV_NAME, sid, tid, info);
if (info == RIONET_DOORBELL_JOIN) {
- if (!rionet_active[sid]) {
- list_for_each_entry(peer, &rionet_peers, node) {
+ if (!nets[rnet->mport->id].active[sid]) {
+ list_for_each_entry(peer,
+ &nets[rnet->mport->id].peers, node) {
if (peer->rdev->destid == sid) {
- rionet_active[sid] = peer->rdev;
- nact++;
+ nets[rnet->mport->id].active[sid] =
+ peer->rdev;
+ nets[rnet->mport->id].nact++;
}
}
rio_mport_send_doorbell(mport, sid,
RIONET_DOORBELL_JOIN);
}
} else if (info == RIONET_DOORBELL_LEAVE) {
- rionet_active[sid] = NULL;
- nact--;
+ nets[rnet->mport->id].active[sid] = NULL;
+ nets[rnet->mport->id].nact--;
} else {
if (netif_msg_intr(rnet))
printk(KERN_WARNING "%s: unhandled doorbell\n",
@@ -334,7 +334,8 @@ static int rionet_open(struct net_device *ndev)
netif_carrier_on(ndev);
netif_start_queue(ndev);
- list_for_each_entry_safe(peer, tmp, &rionet_peers, node) {
+ list_for_each_entry_safe(peer, tmp,
+ &nets[rnet->mport->id].peers, node) {
if (!(peer->res = rio_request_outb_dbell(peer->rdev,
RIONET_DOORBELL_JOIN,
RIONET_DOORBELL_LEAVE)))
@@ -359,7 +360,7 @@ static int rionet_close(struct net_device *ndev)
int i;
if (netif_msg_ifup(rnet))
- printk(KERN_INFO "%s: close\n", DRV_NAME);
+ printk(KERN_INFO "%s: close %s\n", DRV_NAME, ndev->name);
netif_stop_queue(ndev);
netif_carrier_off(ndev);
@@ -367,10 +368,11 @@ static int rionet_close(struct net_device *ndev)
for (i = 0; i < RIONET_RX_RING_SIZE; i++)
kfree_skb(rnet->rx_skb[i]);
- list_for_each_entry_safe(peer, tmp, &rionet_peers, node) {
- if (rionet_active[peer->rdev->destid]) {
+ list_for_each_entry_safe(peer, tmp,
+ &nets[rnet->mport->id].peers, node) {
+ if (nets[rnet->mport->id].active[peer->rdev->destid]) {
rio_send_doorbell(peer->rdev, RIONET_DOORBELL_LEAVE);
- rionet_active[peer->rdev->destid] = NULL;
+ nets[rnet->mport->id].active[peer->rdev->destid] = NULL;
}
rio_release_outb_dbell(peer->rdev, peer->res);
}
@@ -386,17 +388,21 @@ static int rionet_close(struct net_device *ndev)
static void rionet_remove(struct rio_dev *rdev)
{
struct net_device *ndev = rio_get_drvdata(rdev);
+ unsigned char netid = rdev->net->hport->id;
struct rionet_peer *peer, *tmp;
- free_pages((unsigned long)rionet_active, get_order(sizeof(void *) *
- RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size)));
unregister_netdev(ndev);
- free_netdev(ndev);
- list_for_each_entry_safe(peer, tmp, &rionet_peers, node) {
+ free_pages((unsigned long)nets[netid].active, get_order(sizeof(void *) *
+ RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size)));
+ nets[netid].active = NULL;
+
+ list_for_each_entry_safe(peer, tmp, &nets[netid].peers, node) {
list_del(&peer->node);
kfree(peer);
}
+
+ free_netdev(ndev);
}
static void rionet_get_drvinfo(struct net_device *ndev,
@@ -448,13 +454,13 @@ static int rionet_setup_netdev(struct rio_mport *mport, struct net_device *ndev)
const size_t rionet_active_bytes = sizeof(void *) *
RIO_MAX_ROUTE_ENTRIES(mport->sys_size);
- rionet_active = (struct rio_dev **)__get_free_pages(GFP_KERNEL,
- get_order(rionet_active_bytes));
- if (!rionet_active) {
+ nets[mport->id].active = (struct rio_dev **)__get_free_pages(GFP_KERNEL,
+ get_order(rionet_active_bytes));
+ if (!nets[mport->id].active) {
rc = -ENOMEM;
goto out;
}
- memset((void *)rionet_active, 0, rionet_active_bytes);
+ memset((void *)nets[mport->id].active, 0, rionet_active_bytes);
/* Set up private area */
rnet = netdev_priv(ndev);
@@ -483,61 +489,62 @@ static int rionet_setup_netdev(struct rio_mport *mport, struct net_device *ndev)
if (rc != 0)
goto out;
- printk("%s: %s %s Version %s, MAC %pM\n",
+ printk(KERN_INFO "%s: %s %s Version %s, MAC %pM, %s\n",
ndev->name,
DRV_NAME,
DRV_DESC,
DRV_VERSION,
- ndev->dev_addr);
+ ndev->dev_addr,
+ mport->name);
out:
return rc;
}
-/*
- * XXX Make multi-net safe
- */
+static unsigned long net_table[RIONET_MAX_NETS/sizeof(unsigned long) + 1];
+
static int rionet_probe(struct rio_dev *rdev, const struct rio_device_id *id)
{
int rc = -ENODEV;
u32 lsrc_ops, ldst_ops;
struct rionet_peer *peer;
struct net_device *ndev = NULL;
+ unsigned char netid = rdev->net->hport->id;
+ int oldnet;
- /* If local device is not rionet capable, give up quickly */
- if (!rionet_capable)
- goto out;
+ if (netid >= RIONET_MAX_NETS)
+ return rc;
- /* Allocate our net_device structure */
- ndev = alloc_etherdev(sizeof(struct rionet_private));
- if (ndev == NULL) {
- rc = -ENOMEM;
- goto out;
- }
+ oldnet = test_and_set_bit(netid, net_table);
/*
* First time through, make sure local device is rionet
- * capable, setup netdev, and set flags so this is skipped
- * on later probes
+ * capable, setup netdev (will be skipped on later probes)
*/
- if (!rionet_check) {
+ if (!oldnet) {
rio_local_read_config_32(rdev->net->hport, RIO_SRC_OPS_CAR,
&lsrc_ops);
rio_local_read_config_32(rdev->net->hport, RIO_DST_OPS_CAR,
&ldst_ops);
if (!is_rionet_capable(lsrc_ops, ldst_ops)) {
printk(KERN_ERR
- "%s: local device is not network capable\n",
- DRV_NAME);
- rionet_check = 1;
- rionet_capable = 0;
+ "%s: local device %s is not network capable\n",
+ DRV_NAME, rdev->net->hport->name);
goto out;
}
+ /* Allocate our net_device structure */
+ ndev = alloc_etherdev(sizeof(struct rionet_private));
+ if (ndev == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ nets[netid].ndev = ndev;
rc = rionet_setup_netdev(rdev->net->hport, ndev);
- rionet_check = 1;
- nact = 0;
- }
+ INIT_LIST_HEAD(&nets[netid].peers);
+ nets[netid].nact = 0;
+ } else if (nets[netid].ndev == NULL)
+ goto out;
/*
* If the remote device has mailbox/doorbell capabilities,
@@ -549,10 +556,10 @@ static int rionet_probe(struct rio_dev *rdev, const struct rio_device_id *id)
goto out;
}
peer->rdev = rdev;
- list_add_tail(&peer->node, &rionet_peers);
+ list_add_tail(&peer->node, &nets[netid].peers);
}
- rio_set_drvdata(rdev, ndev);
+ rio_set_drvdata(rdev, nets[netid].ndev);
out:
return rc;
--
1.7.8.4
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