rapidio: add relation links between RIO device structures
Create back and forward links between RIO devices. These links are
intended for use by error management and hot-plug extensions. Links for
redundant RIO connections between switches are not set (will be fixed in a
separate patch).
Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Thomas Moll <thomas.moll@sysgo.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Micha Nelissen <micha@neli.hopto.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/rapidio/rio-scan.c b/drivers/rapidio/rio-scan.c
index d09c359..d2ea018 100644
--- a/drivers/rapidio/rio-scan.c
+++ b/drivers/rapidio/rio-scan.c
@@ -444,7 +444,10 @@
/* If a PE has both switch and other functions, show it as a switch */
if (rio_is_switch(rdev)) {
- rswitch = kzalloc(sizeof(struct rio_switch), GFP_KERNEL);
+ rswitch = kzalloc(sizeof(*rswitch) +
+ RIO_GET_TOTAL_PORTS(rdev->swpinfo) *
+ sizeof(rswitch->nextdev[0]),
+ GFP_KERNEL);
if (!rswitch)
goto cleanup;
rswitch->switchid = next_switchid;
@@ -723,25 +726,6 @@
}
/**
- * rio_get_swpinfo_tports- Gets total number of ports on the switch
- * @mport: Master port to send transaction
- * @destid: Destination ID associated with the switch
- * @hopcount: Number of hops to the device
- *
- * Returns total numbers of ports implemented by the switch device.
- */
-static u8 rio_get_swpinfo_tports(struct rio_mport *mport, u16 destid,
- u8 hopcount)
-{
- u32 result;
-
- rio_mport_read_config_32(mport, destid, hopcount, RIO_SWP_INFO_CAR,
- &result);
-
- return RIO_GET_TOTAL_PORTS(result);
-}
-
-/**
* rio_net_add_mport- Add a master port to a RIO network
* @net: RIO network
* @port: Master port to add
@@ -761,15 +745,16 @@
* @net: RIO network being enumerated
* @port: Master port to send transactions
* @hopcount: Number of hops into the network
+ * @prev: Previous RIO device connected to the enumerated one
+ * @prev_port: Port on previous RIO device
*
* Recursively enumerates a RIO network. Transactions are sent via the
* master port passed in @port.
*/
static int __devinit rio_enum_peer(struct rio_net *net, struct rio_mport *port,
- u8 hopcount)
+ u8 hopcount, struct rio_dev *prev, int prev_port)
{
int port_num;
- int num_ports;
int cur_destid;
int sw_destid;
int sw_inport;
@@ -814,6 +799,9 @@
if (rdev) {
/* Add device to the global and bus/net specific list. */
list_add_tail(&rdev->net_list, &net->devices);
+ rdev->prev = prev;
+ if (prev && rio_is_switch(prev))
+ prev->rswitch->nextdev[prev_port] = rdev;
} else
return -1;
@@ -832,14 +820,14 @@
rdev->rswitch->route_table[destid] = sw_inport;
}
- num_ports =
- rio_get_swpinfo_tports(port, RIO_ANY_DESTID(port->sys_size),
- hopcount);
pr_debug(
"RIO: found %s (vid %4.4x did %4.4x) with %d ports\n",
- rio_name(rdev), rdev->vid, rdev->did, num_ports);
+ rio_name(rdev), rdev->vid, rdev->did,
+ RIO_GET_TOTAL_PORTS(rdev->swpinfo));
sw_destid = next_destid;
- for (port_num = 0; port_num < num_ports; port_num++) {
+ for (port_num = 0;
+ port_num < RIO_GET_TOTAL_PORTS(rdev->swpinfo);
+ port_num++) {
/*Enable Input Output Port (transmitter reviever)*/
rio_enable_rx_tx_port(port, 0,
RIO_ANY_DESTID(port->sys_size),
@@ -864,7 +852,8 @@
RIO_ANY_DESTID(port->sys_size),
port_num, 0);
- if (rio_enum_peer(net, port, hopcount + 1) < 0)
+ if (rio_enum_peer(net, port, hopcount + 1,
+ rdev, port_num) < 0)
return -1;
/* Update routing tables */
@@ -951,7 +940,6 @@
u8 hopcount)
{
u8 port_num, route_port;
- int num_ports;
struct rio_dev *rdev;
u16 ndestid;
@@ -968,11 +956,13 @@
/* Associated destid is how we accessed this switch */
rdev->rswitch->destid = destid;
- num_ports = rio_get_swpinfo_tports(port, destid, hopcount);
pr_debug(
"RIO: found %s (vid %4.4x did %4.4x) with %d ports\n",
- rio_name(rdev), rdev->vid, rdev->did, num_ports);
- for (port_num = 0; port_num < num_ports; port_num++) {
+ rio_name(rdev), rdev->vid, rdev->did,
+ RIO_GET_TOTAL_PORTS(rdev->swpinfo));
+ for (port_num = 0;
+ port_num < RIO_GET_TOTAL_PORTS(rdev->swpinfo);
+ port_num++) {
if (RIO_GET_PORT_NUM(rdev->swpinfo) == port_num)
continue;
@@ -1167,7 +1157,7 @@
/* Enable Input Output Port (transmitter reviever) */
rio_enable_rx_tx_port(mport, 1, 0, 0, 0);
- if (rio_enum_peer(net, mport, 0) < 0) {
+ if (rio_enum_peer(net, mport, 0, NULL, 0) < 0) {
/* A higher priority host won enumeration, bail. */
printk(KERN_INFO
"RIO: master port %d device has lost enumeration to a remote host\n",