-1,
};
+
+/*
+ * rio_destid_alloc - Allocate next available destID for given network
+ * net: RIO network
+ *
+ * Returns next available device destination ID for the specified RIO network.
+ * Marks allocated ID as one in use.
+ * Returns RIO_INVALID_DESTID if new destID is not available.
+ */
+static u16 rio_destid_alloc(struct rio_net *net)
+{
+ int destid;
+ struct rio_id_table *idtab = &net->destid_table;
+
+ spin_lock(&idtab->lock);
+ destid = find_next_zero_bit(idtab->table, idtab->max, idtab->next);
+ if (destid >= idtab->max)
+ destid = find_first_zero_bit(idtab->table, idtab->max);
+
+ if (destid < idtab->max) {
+ idtab->next = destid + 1;
+ if (idtab->next >= idtab->max)
+ idtab->next = 0;
+ set_bit(destid, idtab->table);
+ destid += idtab->start;
+ } else
+ destid = RIO_INVALID_DESTID;
+
+ spin_unlock(&idtab->lock);
+ return (u16)destid;
+}
+
+/*
+ * rio_destid_reserve - Reserve the specivied destID
+ * net: RIO network
+ * destid: destID to reserve
+ *
+ * Tries to reserve the specified destID.
+ * Returns 0 if successfull.
+ */
+static int rio_destid_reserve(struct rio_net *net, u16 destid)
+{
+ int oldbit;
+ struct rio_id_table *idtab = &net->destid_table;
+
+ destid -= idtab->start;
+ spin_lock(&idtab->lock);
+ oldbit = test_and_set_bit(destid, idtab->table);
+ spin_unlock(&idtab->lock);
+ return oldbit;
+}
+
+/*
+ * rio_destid_free - free a previously allocated destID
+ * net: RIO network
+ * destid: destID to free
+ *
+ * Makes the specified destID available for use.
+ */
+static void rio_destid_free(struct rio_net *net, u16 destid)
+{
+ struct rio_id_table *idtab = &net->destid_table;
+
+ destid -= idtab->start;
+ spin_lock(&idtab->lock);
+ clear_bit(destid, idtab->table);
+ spin_unlock(&idtab->lock);
+}
+
+/*
+ * rio_destid_first - return first destID in use
+ * net: RIO network
+ */
+static u16 rio_destid_first(struct rio_net *net)
+{
+ int destid;
+ struct rio_id_table *idtab = &net->destid_table;
+
+ spin_lock(&idtab->lock);
+ destid = find_first_bit(idtab->table, idtab->max);
+ if (destid >= idtab->max)
+ destid = RIO_INVALID_DESTID;
+ else
+ destid += idtab->start;
+ spin_unlock(&idtab->lock);
+ return (u16)destid;
+}
+
+/*
+ * rio_destid_next - return next destID in use
+ * net: RIO network
+ * from: destination ID from which search shall continue
+ */
+static u16 rio_destid_next(struct rio_net *net, u16 from)
+{
+ int destid;
+ struct rio_id_table *idtab = &net->destid_table;
+
+ spin_lock(&idtab->lock);
+ destid = find_next_bit(idtab->table, idtab->max, from);
+ if (destid >= idtab->max)
+ destid = RIO_INVALID_DESTID;
+ else
+ destid += idtab->start;
+ spin_unlock(&idtab->lock);
+ return (u16)destid;
+}
+
/**
* rio_get_device_id - Get the base/extended device id for a device
* @port: RIO master port
/* Set master port destid and init destid ctr */
rio_local_set_device_id(port, port->host_deviceid);
-
- if (next_destid == port->host_deviceid)
- next_destid++;
-
return 0;
}
if (rio_device_has_destid(port, rdev->src_ops, rdev->dst_ops)) {
if (do_enum) {
rio_set_device_id(port, destid, hopcount, next_destid);
- rdev->destid = next_destid++;
- if (next_destid == port->host_deviceid)
- next_destid++;
+ rdev->destid = next_destid;
+ next_destid = rio_destid_alloc(net);
} else
rdev->destid = rio_get_device_id(port, destid, hopcount);
static int __devinit rio_enum_peer(struct rio_net *net, struct rio_mport *port,
u8 hopcount, struct rio_dev *prev, int prev_port)
{
- int port_num;
- int cur_destid;
- int sw_destid;
- int sw_inport;
struct rio_dev *rdev;
- u16 destid;
u32 regval;
int tmp;
return -1;
if (rio_is_switch(rdev)) {
+ int sw_destid;
+ int cur_destid;
+ int sw_inport;
+ u16 destid;
+ int port_num;
+
sw_inport = RIO_GET_PORT_NUM(rdev->swpinfo);
rio_route_add_entry(rdev, RIO_GLOBAL_TABLE,
port->host_deviceid, sw_inport, 0);
rdev->rswitch->route_table[port->host_deviceid] = sw_inport;
- for (destid = 0; destid < next_destid; destid++) {
- if (destid == port->host_deviceid)
- continue;
- rio_route_add_entry(rdev, RIO_GLOBAL_TABLE,
- destid, sw_inport, 0);
- rdev->rswitch->route_table[destid] = sw_inport;
+ destid = rio_destid_first(net);
+ while (destid != RIO_INVALID_DESTID && destid < next_destid) {
+ if (destid != port->host_deviceid) {
+ rio_route_add_entry(rdev, RIO_GLOBAL_TABLE,
+ destid, sw_inport, 0);
+ rdev->rswitch->route_table[destid] = sw_inport;
+ }
+ destid = rio_destid_next(net, destid + 1);
}
-
pr_debug(
"RIO: found %s (vid %4.4x did %4.4x) with %d ports\n",
rio_name(rdev), rdev->vid, rdev->did,
return -1;
/* Update routing tables */
- if (next_destid > cur_destid) {
+ destid = rio_destid_next(net, cur_destid + 1);
+ if (destid != RIO_INVALID_DESTID) {
for (destid = cur_destid;
- destid < next_destid; destid++) {
- if (destid == port->host_deviceid)
- continue;
- rio_route_add_entry(rdev,
+ destid < next_destid;) {
+ if (destid != port->host_deviceid) {
+ rio_route_add_entry(rdev,
RIO_GLOBAL_TABLE,
destid,
port_num,
0);
- rdev->rswitch->
- route_table[destid] =
- port_num;
+ rdev->rswitch->
+ route_table[destid] =
+ port_num;
+ }
+ destid = rio_destid_next(net,
+ destid + 1);
}
}
} else {
rio_init_em(rdev);
/* Check for empty switch */
- if (next_destid == sw_destid) {
- next_destid++;
- if (next_destid == port->host_deviceid)
- next_destid++;
- }
+ if (next_destid == sw_destid)
+ next_destid = rio_destid_alloc(net);
rdev->destid = sw_destid;
} else
/**
* rio_alloc_net- Allocate and configure a new RIO network
* @port: Master port associated with the RIO network
+ * @do_enum: Enumeration/Discovery mode flag
+ * @start: logical minimal start id for new net
*
* Allocates a RIO network structure, initializes per-network
* list heads, and adds the associated master port to the
* network list of associated master ports. Returns a
* RIO network pointer on success or %NULL on failure.
*/
-static struct rio_net __devinit *rio_alloc_net(struct rio_mport *port)
+static struct rio_net __devinit *rio_alloc_net(struct rio_mport *port,
+ int do_enum, u16 start)
{
struct rio_net *net;
net = kzalloc(sizeof(struct rio_net), GFP_KERNEL);
+ if (net && do_enum) {
+ net->destid_table.table = kzalloc(
+ BITS_TO_LONGS(RIO_MAX_ROUTE_ENTRIES(port->sys_size)) *
+ sizeof(long),
+ GFP_KERNEL);
+
+ if (net->destid_table.table == NULL) {
+ pr_err("RIO: failed to allocate destID table\n");
+ kfree(net);
+ net = NULL;
+ } else {
+ net->destid_table.start = start;
+ net->destid_table.next = 0;
+ net->destid_table.max =
+ RIO_MAX_ROUTE_ENTRIES(port->sys_size);
+ spin_lock_init(&net->destid_table.lock);
+ }
+ }
+
if (net) {
INIT_LIST_HEAD(&net->node);
INIT_LIST_HEAD(&net->devices);
/* If master port has an active link, allocate net and enum peers */
if (rio_mport_is_active(mport)) {
- if (!(net = rio_alloc_net(mport))) {
+ net = rio_alloc_net(mport, 1, 0);
+ if (!net) {
printk(KERN_ERR "RIO: failed to allocate new net\n");
rc = -ENOMEM;
goto out;
}
+ /* reserve mport destID in new net */
+ rio_destid_reserve(net, mport->host_deviceid);
+
/* Enable Input Output Port (transmitter reviever) */
rio_enable_rx_tx_port(mport, 1, 0, 0, 0);
rio_local_write_config_32(mport, RIO_COMPONENT_TAG_CSR,
next_comptag++);
+ next_destid = rio_destid_alloc(net);
+
if (rio_enum_peer(net, mport, 0, NULL, 0) < 0) {
/* A higher priority host won enumeration, bail. */
printk(KERN_INFO
rc = -EBUSY;
goto out;
}
+ /* free the last allocated destID (unused) */
+ rio_destid_free(net, next_destid);
rio_update_route_tables(net);
rio_clear_locks(net);
rio_pw_enable(mport, 1);
enum_done:
pr_debug("RIO: ... enumeration done\n");
- net = rio_alloc_net(mport);
+ net = rio_alloc_net(mport, 0, 0);
if (!net) {
printk(KERN_ERR "RIO: Failed to allocate new net\n");
goto bail;
projects / deliverable / linux.git / blobdiff