2 * RapidIO enumeration and discovery support
4 * Copyright 2005 MontaVista Software, Inc.
5 * Matt Porter <mporter@kernel.crashing.org>
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.
13 #include <linux/config.h>
14 #include <linux/types.h>
15 #include <linux/kernel.h>
17 #include <linux/delay.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/init.h>
20 #include <linux/rio.h>
21 #include <linux/rio_drv.h>
22 #include <linux/rio_ids.h>
23 #include <linux/rio_regs.h>
24 #include <linux/module.h>
25 #include <linux/spinlock.h>
26 #include <linux/timer.h>
30 LIST_HEAD(rio_devices);
31 static LIST_HEAD(rio_switches);
33 #define RIO_ENUM_CMPL_MAGIC 0xdeadbeef
35 static void rio_enum_timeout(unsigned long);
37 DEFINE_SPINLOCK(rio_global_list_lock);
39 static int next_destid = 0;
40 static int next_switchid = 0;
41 static int next_net = 0;
43 static struct timer_list rio_enum_timer =
44 TIMER_INITIALIZER(rio_enum_timeout, 0, 0);
46 static int rio_mport_phys_table[] = {
48 RIO_EFB_PAR_EP_REC_ID,
50 RIO_EFB_SER_EP_REC_ID,
54 static int rio_sport_phys_table[] = {
55 RIO_EFB_PAR_EP_FREE_ID,
56 RIO_EFB_SER_EP_FREE_ID,
61 * rio_get_device_id - Get the base/extended device id for a device
62 * @port: RIO master port
63 * @destid: Destination ID of device
64 * @hopcount: Hopcount to device
66 * Reads the base/extended device id from a device. Returns the
69 static u16 rio_get_device_id(struct rio_mport *port, u16 destid, u8 hopcount)
73 rio_mport_read_config_32(port, destid, hopcount, RIO_DID_CSR, &result);
75 return RIO_GET_DID(result);
79 * rio_set_device_id - Set the base/extended device id for a device
80 * @port: RIO master port
81 * @destid: Destination ID of device
82 * @hopcount: Hopcount to device
83 * @did: Device ID value to be written
85 * Writes the base/extended device id from a device.
87 static void rio_set_device_id(struct rio_mport *port, u16 destid, u8 hopcount, u16 did)
89 rio_mport_write_config_32(port, destid, hopcount, RIO_DID_CSR,
94 * rio_local_set_device_id - Set the base/extended device id for a port
95 * @port: RIO master port
96 * @did: Device ID value to be written
98 * Writes the base/extended device id from a device.
100 static void rio_local_set_device_id(struct rio_mport *port, u16 did)
102 rio_local_write_config_32(port, RIO_DID_CSR, RIO_SET_DID(did));
106 * rio_clear_locks- Release all host locks and signal enumeration complete
107 * @port: Master port to issue transaction
109 * Marks the component tag CSR on each device with the enumeration
110 * complete flag. When complete, it then release the host locks on
111 * each device. Returns 0 on success or %-EINVAL on failure.
113 static int rio_clear_locks(struct rio_mport *port)
115 struct rio_dev *rdev;
119 /* Write component tag CSR magic complete value */
120 rio_local_write_config_32(port, RIO_COMPONENT_TAG_CSR,
121 RIO_ENUM_CMPL_MAGIC);
122 list_for_each_entry(rdev, &rio_devices, global_list)
123 rio_write_config_32(rdev, RIO_COMPONENT_TAG_CSR,
124 RIO_ENUM_CMPL_MAGIC);
126 /* Release host device id locks */
127 rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR,
128 port->host_deviceid);
129 rio_local_read_config_32(port, RIO_HOST_DID_LOCK_CSR, &result);
130 if ((result & 0xffff) != 0xffff) {
132 "RIO: badness when releasing host lock on master port, result %8.8x\n",
136 list_for_each_entry(rdev, &rio_devices, global_list) {
137 rio_write_config_32(rdev, RIO_HOST_DID_LOCK_CSR,
138 port->host_deviceid);
139 rio_read_config_32(rdev, RIO_HOST_DID_LOCK_CSR, &result);
140 if ((result & 0xffff) != 0xffff) {
142 "RIO: badness when releasing host lock on vid %4.4x did %4.4x\n",
143 rdev->vid, rdev->did);
152 * rio_enum_host- Set host lock and initialize host destination ID
153 * @port: Master port to issue transaction
155 * Sets the local host master port lock and destination ID register
156 * with the host device ID value. The host device ID value is provided
157 * by the platform. Returns %0 on success or %-1 on failure.
159 static int rio_enum_host(struct rio_mport *port)
163 /* Set master port host device id lock */
164 rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR,
165 port->host_deviceid);
167 rio_local_read_config_32(port, RIO_HOST_DID_LOCK_CSR, &result);
168 if ((result & 0xffff) != port->host_deviceid)
171 /* Set master port destid and init destid ctr */
172 rio_local_set_device_id(port, port->host_deviceid);
174 if (next_destid == port->host_deviceid)
181 * rio_device_has_destid- Test if a device contains a destination ID register
182 * @port: Master port to issue transaction
183 * @src_ops: RIO device source operations
184 * @dst_ops: RIO device destination operations
186 * Checks the provided @src_ops and @dst_ops for the necessary transaction
187 * capabilities that indicate whether or not a device will implement a
188 * destination ID register. Returns 1 if true or 0 if false.
190 static int rio_device_has_destid(struct rio_mport *port, int src_ops,
193 u32 mask = RIO_OPS_READ | RIO_OPS_WRITE | RIO_OPS_ATOMIC_TST_SWP | RIO_OPS_ATOMIC_INC | RIO_OPS_ATOMIC_DEC | RIO_OPS_ATOMIC_SET | RIO_OPS_ATOMIC_CLR;
195 return !!((src_ops | dst_ops) & mask);
199 * rio_release_dev- Frees a RIO device struct
200 * @dev: LDM device associated with a RIO device struct
202 * Gets the RIO device struct associated a RIO device struct.
203 * The RIO device struct is freed.
205 static void rio_release_dev(struct device *dev)
207 struct rio_dev *rdev;
209 rdev = to_rio_dev(dev);
214 * rio_is_switch- Tests if a RIO device has switch capabilities
217 * Gets the RIO device Processing Element Features register
218 * contents and tests for switch capabilities. Returns 1 if
219 * the device is a switch or 0 if it is not a switch.
220 * The RIO device struct is freed.
222 static int rio_is_switch(struct rio_dev *rdev)
224 if (rdev->pef & RIO_PEF_SWITCH)
230 * rio_route_set_ops- Sets routing operations for a particular vendor switch
233 * Searches the RIO route ops table for known switch types. If the vid
234 * and did match a switch table entry, then set the add_entry() and
235 * get_entry() ops to the table entry values.
237 static void rio_route_set_ops(struct rio_dev *rdev)
239 struct rio_route_ops *cur = __start_rio_route_ops;
240 struct rio_route_ops *end = __end_rio_route_ops;
243 if ((cur->vid == rdev->vid) && (cur->did == rdev->did)) {
244 pr_debug("RIO: adding routing ops for %s\n", rio_name(rdev));
245 rdev->rswitch->add_entry = cur->add_hook;
246 rdev->rswitch->get_entry = cur->get_hook;
251 if (!rdev->rswitch->add_entry || !rdev->rswitch->get_entry)
252 printk(KERN_ERR "RIO: missing routing ops for %s\n",
257 * rio_add_device- Adds a RIO device to the device model
260 * Adds the RIO device to the global device list and adds the RIO
261 * device to the RIO device list. Creates the generic sysfs nodes
264 static void __devinit rio_add_device(struct rio_dev *rdev)
266 device_add(&rdev->dev);
268 spin_lock(&rio_global_list_lock);
269 list_add_tail(&rdev->global_list, &rio_devices);
270 spin_unlock(&rio_global_list_lock);
272 rio_create_sysfs_dev_files(rdev);
276 * rio_setup_device- Allocates and sets up a RIO device
278 * @port: Master port to send transactions
279 * @destid: Current destination ID
280 * @hopcount: Current hopcount
281 * @do_enum: Enumeration/Discovery mode flag
283 * Allocates a RIO device and configures fields based on configuration
284 * space contents. If device has a destination ID register, a destination
285 * ID is either assigned in enumeration mode or read from configuration
286 * space in discovery mode. If the device has switch capabilities, then
287 * a switch is allocated and configured appropriately. Returns a pointer
288 * to a RIO device on success or NULL on failure.
291 static struct rio_dev *rio_setup_device(struct rio_net *net,
292 struct rio_mport *port, u16 destid,
293 u8 hopcount, int do_enum)
295 struct rio_dev *rdev;
296 struct rio_switch *rswitch;
299 rdev = kmalloc(sizeof(struct rio_dev), GFP_KERNEL);
303 memset(rdev, 0, sizeof(struct rio_dev));
305 rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_ID_CAR,
307 rdev->did = result >> 16;
308 rdev->vid = result & 0xffff;
309 rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_INFO_CAR,
311 rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_ID_CAR,
313 rdev->asm_did = result >> 16;
314 rdev->asm_vid = result & 0xffff;
315 rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_INFO_CAR,
317 rdev->asm_rev = result >> 16;
318 rio_mport_read_config_32(port, destid, hopcount, RIO_PEF_CAR,
320 if (rdev->pef & RIO_PEF_EXT_FEATURES)
321 rdev->efptr = result & 0xffff;
323 rio_mport_read_config_32(port, destid, hopcount, RIO_SRC_OPS_CAR,
325 rio_mport_read_config_32(port, destid, hopcount, RIO_DST_OPS_CAR,
328 if (rio_device_has_destid(port, rdev->src_ops, rdev->dst_ops)
330 rio_set_device_id(port, destid, hopcount, next_destid);
331 rdev->destid = next_destid++;
332 if (next_destid == port->host_deviceid)
335 rdev->destid = rio_get_device_id(port, destid, hopcount);
337 /* If a PE has both switch and other functions, show it as a switch */
338 if (rio_is_switch(rdev)) {
339 rio_mport_read_config_32(port, destid, hopcount,
340 RIO_SWP_INFO_CAR, &rdev->swpinfo);
341 rswitch = kmalloc(sizeof(struct rio_switch), GFP_KERNEL);
347 rswitch->switchid = next_switchid;
348 rswitch->hopcount = hopcount;
349 rswitch->destid = 0xffff;
350 /* Initialize switch route table */
351 for (rdid = 0; rdid < RIO_MAX_ROUTE_ENTRIES; rdid++)
352 rswitch->route_table[rdid] = RIO_INVALID_ROUTE;
353 rdev->rswitch = rswitch;
354 sprintf(rio_name(rdev), "%02x:s:%04x", rdev->net->id,
355 rdev->rswitch->switchid);
356 rio_route_set_ops(rdev);
358 list_add_tail(&rswitch->node, &rio_switches);
361 sprintf(rio_name(rdev), "%02x:e:%04x", rdev->net->id,
364 rdev->dev.bus = &rio_bus_type;
366 device_initialize(&rdev->dev);
367 rdev->dev.release = rio_release_dev;
370 rdev->dma_mask = DMA_32BIT_MASK;
371 rdev->dev.dma_mask = &rdev->dma_mask;
372 rdev->dev.coherent_dma_mask = DMA_32BIT_MASK;
374 if ((rdev->pef & RIO_PEF_INB_DOORBELL) &&
375 (rdev->dst_ops & RIO_DST_OPS_DOORBELL))
376 rio_init_dbell_res(&rdev->riores[RIO_DOORBELL_RESOURCE],
379 rio_add_device(rdev);
386 * rio_sport_is_active- Tests if a switch port has an active connection.
387 * @port: Master port to send transaction
388 * @destid: Associated destination ID for switch
389 * @hopcount: Hopcount to reach switch
390 * @sport: Switch port number
392 * Reads the port error status CSR for a particular switch port to
393 * determine if the port has an active link. Returns
394 * %PORT_N_ERR_STS_PORT_OK if the port is active or %0 if it is
398 rio_sport_is_active(struct rio_mport *port, u16 destid, u8 hopcount, int sport)
403 int *entry = rio_sport_phys_table;
407 rio_mport_get_feature(port, 0, destid, hopcount, *entry)))
410 } while (*++entry >= 0);
413 rio_mport_read_config_32(port, destid, hopcount,
415 RIO_PORT_N_ERR_STS_CSR(sport),
418 return (result & PORT_N_ERR_STS_PORT_OK);
422 * rio_route_add_entry- Add a route entry to a switch routing table
423 * @mport: Master port to send transaction
424 * @rdev: Switch device
425 * @table: Routing table ID
426 * @route_destid: Destination ID to be routed
427 * @route_port: Port number to be routed
429 * Calls the switch specific add_entry() method to add a route entry
430 * on a switch. The route table can be specified using the @table
431 * argument if a switch has per port routing tables or the normal
432 * use is to specific all tables (or the global table) by passing
433 * %RIO_GLOBAL_TABLE in @table. Returns %0 on success or %-EINVAL
436 static int rio_route_add_entry(struct rio_mport *mport, struct rio_dev *rdev,
437 u16 table, u16 route_destid, u8 route_port)
439 return rdev->rswitch->add_entry(mport, rdev->rswitch->destid,
440 rdev->rswitch->hopcount, table,
441 route_destid, route_port);
445 * rio_route_get_entry- Read a route entry in a switch routing table
446 * @mport: Master port to send transaction
447 * @rdev: Switch device
448 * @table: Routing table ID
449 * @route_destid: Destination ID to be routed
450 * @route_port: Pointer to read port number into
452 * Calls the switch specific get_entry() method to read a route entry
453 * in a switch. The route table can be specified using the @table
454 * argument if a switch has per port routing tables or the normal
455 * use is to specific all tables (or the global table) by passing
456 * %RIO_GLOBAL_TABLE in @table. Returns %0 on success or %-EINVAL
460 rio_route_get_entry(struct rio_mport *mport, struct rio_dev *rdev, u16 table,
461 u16 route_destid, u8 * route_port)
463 return rdev->rswitch->get_entry(mport, rdev->rswitch->destid,
464 rdev->rswitch->hopcount, table,
465 route_destid, route_port);
469 * rio_get_host_deviceid_lock- Reads the Host Device ID Lock CSR on a device
470 * @port: Master port to send transaction
471 * @hopcount: Number of hops to the device
473 * Used during enumeration to read the Host Device ID Lock CSR on a
474 * RIO device. Returns the value of the lock register.
476 static u16 rio_get_host_deviceid_lock(struct rio_mport *port, u8 hopcount)
480 rio_mport_read_config_32(port, RIO_ANY_DESTID, hopcount,
481 RIO_HOST_DID_LOCK_CSR, &result);
483 return (u16) (result & 0xffff);
487 * rio_get_swpinfo_inport- Gets the ingress port number
488 * @mport: Master port to send transaction
489 * @destid: Destination ID associated with the switch
490 * @hopcount: Number of hops to the device
492 * Returns port number being used to access the switch device.
495 rio_get_swpinfo_inport(struct rio_mport *mport, u16 destid, u8 hopcount)
499 rio_mport_read_config_32(mport, destid, hopcount, RIO_SWP_INFO_CAR,
502 return (u8) (result & 0xff);
506 * rio_get_swpinfo_tports- Gets total number of ports on the switch
507 * @mport: Master port to send transaction
508 * @destid: Destination ID associated with the switch
509 * @hopcount: Number of hops to the device
511 * Returns total numbers of ports implemented by the switch device.
513 static u8 rio_get_swpinfo_tports(struct rio_mport *mport, u16 destid,
518 rio_mport_read_config_32(mport, destid, hopcount, RIO_SWP_INFO_CAR,
521 return RIO_GET_TOTAL_PORTS(result);
525 * rio_net_add_mport- Add a master port to a RIO network
527 * @port: Master port to add
529 * Adds a master port to the network list of associated master
532 static void rio_net_add_mport(struct rio_net *net, struct rio_mport *port)
534 spin_lock(&rio_global_list_lock);
535 list_add_tail(&port->nnode, &net->mports);
536 spin_unlock(&rio_global_list_lock);
540 * rio_enum_peer- Recursively enumerate a RIO network through a master port
541 * @net: RIO network being enumerated
542 * @port: Master port to send transactions
543 * @hopcount: Number of hops into the network
545 * Recursively enumerates a RIO network. Transactions are sent via the
546 * master port passed in @port.
548 static int rio_enum_peer(struct rio_net *net, struct rio_mport *port,
554 struct rio_dev *rdev;
558 if (rio_get_host_deviceid_lock(port, hopcount) == port->host_deviceid) {
559 pr_debug("RIO: PE already discovered by this host\n");
561 * Already discovered by this host. Add it as another
562 * master port for the current network.
564 rio_net_add_mport(net, port);
568 /* Attempt to acquire device lock */
569 rio_mport_write_config_32(port, RIO_ANY_DESTID, hopcount,
570 RIO_HOST_DID_LOCK_CSR, port->host_deviceid);
571 while ((tmp = rio_get_host_deviceid_lock(port, hopcount))
572 < port->host_deviceid) {
575 /* Attempt to acquire device lock again */
576 rio_mport_write_config_32(port, RIO_ANY_DESTID, hopcount,
577 RIO_HOST_DID_LOCK_CSR,
578 port->host_deviceid);
581 if (rio_get_host_deviceid_lock(port, hopcount) > port->host_deviceid) {
583 "RIO: PE locked by a higher priority host...retreating\n");
587 /* Setup new RIO device */
588 if ((rdev = rio_setup_device(net, port, RIO_ANY_DESTID, hopcount, 1))) {
589 /* Add device to the global and bus/net specific list. */
590 list_add_tail(&rdev->net_list, &net->devices);
594 if (rio_is_switch(rdev)) {
597 for (destid = 0; destid < next_destid; destid++) {
598 rio_route_add_entry(port, rdev, RIO_GLOBAL_TABLE,
599 destid, rio_get_swpinfo_inport(port,
602 rdev->rswitch->route_table[destid] =
603 rio_get_swpinfo_inport(port, RIO_ANY_DESTID,
608 rio_get_swpinfo_tports(port, RIO_ANY_DESTID, hopcount);
610 "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n",
611 rio_name(rdev), rdev->vid, rdev->did, num_ports);
612 for (port_num = 0; port_num < num_ports; port_num++) {
613 if (rio_get_swpinfo_inport
614 (port, RIO_ANY_DESTID, hopcount) == port_num)
617 cur_destid = next_destid;
619 if (rio_sport_is_active
620 (port, RIO_ANY_DESTID, hopcount, port_num)) {
622 "RIO: scanning device on port %d\n",
624 rio_route_add_entry(port, rdev,
626 RIO_ANY_DESTID, port_num);
628 if (rio_enum_peer(net, port, hopcount + 1) < 0)
631 /* Update routing tables */
632 if (next_destid > cur_destid) {
633 for (destid = cur_destid;
634 destid < next_destid; destid++) {
635 rio_route_add_entry(port, rdev,
640 route_table[destid] =
643 rdev->rswitch->destid = cur_destid;
648 pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n",
649 rio_name(rdev), rdev->vid, rdev->did);
655 * rio_enum_complete- Tests if enumeration of a network is complete
656 * @port: Master port to send transaction
658 * Tests the Component Tag CSR for presence of the magic enumeration
659 * complete flag. Return %1 if enumeration is complete or %0 if
660 * enumeration is incomplete.
662 static int rio_enum_complete(struct rio_mport *port)
667 rio_local_read_config_32(port, RIO_COMPONENT_TAG_CSR, &tag_csr);
669 if (tag_csr == RIO_ENUM_CMPL_MAGIC)
676 * rio_disc_peer- Recursively discovers a RIO network through a master port
677 * @net: RIO network being discovered
678 * @port: Master port to send transactions
679 * @destid: Current destination ID in network
680 * @hopcount: Number of hops into the network
682 * Recursively discovers a RIO network. Transactions are sent via the
683 * master port passed in @port.
686 rio_disc_peer(struct rio_net *net, struct rio_mport *port, u16 destid,
689 u8 port_num, route_port;
691 struct rio_dev *rdev;
694 /* Setup new RIO device */
695 if ((rdev = rio_setup_device(net, port, destid, hopcount, 0))) {
696 /* Add device to the global and bus/net specific list. */
697 list_add_tail(&rdev->net_list, &net->devices);
701 if (rio_is_switch(rdev)) {
704 /* Associated destid is how we accessed this switch */
705 rdev->rswitch->destid = destid;
707 num_ports = rio_get_swpinfo_tports(port, destid, hopcount);
709 "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n",
710 rio_name(rdev), rdev->vid, rdev->did, num_ports);
711 for (port_num = 0; port_num < num_ports; port_num++) {
712 if (rio_get_swpinfo_inport(port, destid, hopcount) ==
716 if (rio_sport_is_active
717 (port, destid, hopcount, port_num)) {
719 "RIO: scanning device on port %d\n",
721 for (ndestid = 0; ndestid < RIO_ANY_DESTID;
723 rio_route_get_entry(port, rdev,
727 if (route_port == port_num)
732 (net, port, ndestid, hopcount + 1) < 0)
737 pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n",
738 rio_name(rdev), rdev->vid, rdev->did);
744 * rio_mport_is_active- Tests if master port link is active
745 * @port: Master port to test
747 * Reads the port error status CSR for the master port to
748 * determine if the port has an active link. Returns
749 * %PORT_N_ERR_STS_PORT_OK if the master port is active
750 * or %0 if it is inactive.
752 static int rio_mport_is_active(struct rio_mport *port)
756 int *entry = rio_mport_phys_table;
760 rio_mport_get_feature(port, 1, 0, 0, *entry)))
762 } while (*++entry >= 0);
765 rio_local_read_config_32(port,
767 RIO_PORT_N_ERR_STS_CSR(port->index),
770 return (result & PORT_N_ERR_STS_PORT_OK);
774 * rio_alloc_net- Allocate and configure a new RIO network
775 * @port: Master port associated with the RIO network
777 * Allocates a RIO network structure, initializes per-network
778 * list heads, and adds the associated master port to the
779 * network list of associated master ports. Returns a
780 * RIO network pointer on success or %NULL on failure.
782 static struct rio_net __devinit *rio_alloc_net(struct rio_mport *port)
786 net = kmalloc(sizeof(struct rio_net), GFP_KERNEL);
788 memset(net, 0, sizeof(struct rio_net));
789 INIT_LIST_HEAD(&net->node);
790 INIT_LIST_HEAD(&net->devices);
791 INIT_LIST_HEAD(&net->mports);
792 list_add_tail(&port->nnode, &net->mports);
794 net->id = next_net++;
800 * rio_enum_mport- Start enumeration through a master port
801 * @mport: Master port to send transactions
803 * Starts the enumeration process. If somebody has enumerated our
804 * master port device, then give up. If not and we have an active
805 * link, then start recursive peer enumeration. Returns %0 if
806 * enumeration succeeds or %-EBUSY if enumeration fails.
808 int rio_enum_mport(struct rio_mport *mport)
810 struct rio_net *net = NULL;
813 printk(KERN_INFO "RIO: enumerate master port %d, %s\n", mport->id,
815 /* If somebody else enumerated our master port device, bail. */
816 if (rio_enum_host(mport) < 0) {
818 "RIO: master port %d device has been enumerated by a remote host\n",
824 /* If master port has an active link, allocate net and enum peers */
825 if (rio_mport_is_active(mport)) {
826 if (!(net = rio_alloc_net(mport))) {
827 printk(KERN_ERR "RIO: failed to allocate new net\n");
831 if (rio_enum_peer(net, mport, 0) < 0) {
832 /* A higher priority host won enumeration, bail. */
834 "RIO: master port %d device has lost enumeration to a remote host\n",
836 rio_clear_locks(mport);
840 rio_clear_locks(mport);
842 printk(KERN_INFO "RIO: master port %d link inactive\n",
852 * rio_build_route_tables- Generate route tables from switch route entries
854 * For each switch device, generate a route table by copying existing
855 * route entries from the switch.
857 static void rio_build_route_tables(void)
859 struct rio_dev *rdev;
863 list_for_each_entry(rdev, &rio_devices, global_list)
864 if (rio_is_switch(rdev))
865 for (i = 0; i < RIO_MAX_ROUTE_ENTRIES; i++) {
866 if (rio_route_get_entry
867 (rdev->net->hport, rdev, RIO_GLOBAL_TABLE, i,
870 rdev->rswitch->route_table[i] = sport;
875 * rio_enum_timeout- Signal that enumeration timed out
876 * @data: Address of timeout flag.
878 * When the enumeration complete timer expires, set a flag that
879 * signals to the discovery process that enumeration did not
880 * complete in a sane amount of time.
882 static void rio_enum_timeout(unsigned long data)
884 /* Enumeration timed out, set flag */
889 * rio_disc_mport- Start discovery through a master port
890 * @mport: Master port to send transactions
892 * Starts the discovery process. If we have an active link,
893 * then wait for the signal that enumeration is complete.
894 * When enumeration completion is signaled, start recursive
895 * peer discovery. Returns %0 if discovery succeeds or %-EBUSY
898 int rio_disc_mport(struct rio_mport *mport)
900 struct rio_net *net = NULL;
901 int enum_timeout_flag = 0;
903 printk(KERN_INFO "RIO: discover master port %d, %s\n", mport->id,
906 /* If master port has an active link, allocate net and discover peers */
907 if (rio_mport_is_active(mport)) {
908 if (!(net = rio_alloc_net(mport))) {
909 printk(KERN_ERR "RIO: Failed to allocate new net\n");
913 pr_debug("RIO: wait for enumeration complete...");
915 rio_enum_timer.expires =
916 jiffies + CONFIG_RAPIDIO_DISC_TIMEOUT * HZ;
917 rio_enum_timer.data = (unsigned long)&enum_timeout_flag;
918 add_timer(&rio_enum_timer);
919 while (!rio_enum_complete(mport)) {
921 if (enum_timeout_flag) {
922 del_timer_sync(&rio_enum_timer);
926 del_timer_sync(&rio_enum_timer);
929 if (rio_disc_peer(net, mport, RIO_ANY_DESTID, 0) < 0) {
931 "RIO: master port %d device has failed discovery\n",
936 rio_build_route_tables();
942 pr_debug("timeout\n");