1 // SPDX-License-Identifier: GPL-2.0-or-later
9  * Copyright 2009 - 2013 Integrated Device Technology, Inc.
17 #include <linux/init.h>
30  * struct rio_pwrite - RIO portwrite event
33  * @context: Handler specific context to pass on event
65  * rio_local_get_device_id - Get the base/extended device id for a port
69  * implementing the master port. Returns the 8/16-bit device
78 	return (RIO_GET_DID(port->sys_size, result));  in rio_local_get_device_id()
83  * rio_query_mport - Query mport device attributes
93 	if (!port->ops->query_mport)  in rio_query_mport()
94 		return -ENODATA;  in rio_query_mport()
95 	return port->ops->query_mport(port, mport_attr);  in rio_query_mport()
100  * rio_alloc_net- Allocate and initialize a new RIO network data structure
103  * Allocates a RIO network structure, initializes per-network
106  * RIO network pointer on success or %NULL on failure.
113 		INIT_LIST_HEAD(&net->node);  in rio_alloc_net()
114 		INIT_LIST_HEAD(&net->devices);  in rio_alloc_net()
115 		INIT_LIST_HEAD(&net->switches);  in rio_alloc_net()
116 		INIT_LIST_HEAD(&net->mports);  in rio_alloc_net()
117 		mport->net = net;  in rio_alloc_net()
127 	err = device_register(&net->dev);  in rio_add_net()
131 	list_add_tail(&net->node, &rio_nets);  in rio_add_net()
141 	if (!list_empty(&net->node))  in rio_free_net()
142 		list_del(&net->node);  in rio_free_net()
144 	if (net->release)  in rio_free_net()
145 		net->release(net);  in rio_free_net()
146 	device_unregister(&net->dev);  in rio_free_net()
151  * rio_local_set_device_id - Set the base/extended device id for a port
160 				  RIO_SET_DID(port->sys_size, did));  in rio_local_set_device_id()
165  * rio_add_device- Adds a RIO device to the device model
176 	atomic_set(&rdev->state, RIO_DEVICE_RUNNING);  in rio_add_device()
177 	err = device_register(&rdev->dev);  in rio_add_device()
182 	list_add_tail(&rdev->global_list, &rio_devices);  in rio_add_device()
183 	if (rdev->net) {  in rio_add_device()
184 		list_add_tail(&rdev->net_list, &rdev->net->devices);  in rio_add_device()
185 		if (rdev->pef & RIO_PEF_SWITCH)  in rio_add_device()
186 			list_add_tail(&rdev->rswitch->node,  in rio_add_device()
187 				      &rdev->net->switches);  in rio_add_device()
196  * rio_del_device - removes a RIO device from the device model
206 	atomic_set(&rdev->state, state);  in rio_del_device()
208 	list_del(&rdev->global_list);  in rio_del_device()
209 	if (rdev->net) {  in rio_del_device()
210 		list_del(&rdev->net_list);  in rio_del_device()
211 		if (rdev->pef & RIO_PEF_SWITCH) {  in rio_del_device()
212 			list_del(&rdev->rswitch->node);  in rio_del_device()
213 			kfree(rdev->rswitch->route_table);  in rio_del_device()
217 	device_unregister(&rdev->dev);  in rio_del_device()
222  * rio_request_inb_mbox - request inbound mailbox service
224  * @dev_id: Device specific pointer to pass on event
230  * a callback function to the resource. Returns %0 on success.
239 	int rc = -ENOSYS;  in rio_request_inb_mbox()
242 	if (!mport->ops->open_inb_mbox)  in rio_request_inb_mbox()
250 		rc = request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE],  in rio_request_inb_mbox()
257 		mport->inb_msg[mbox].res = res;  in rio_request_inb_mbox()
260 		mport->inb_msg[mbox].mcback = minb;  in rio_request_inb_mbox()
262 		rc = mport->ops->open_inb_mbox(mport, dev_id, mbox, entries);  in rio_request_inb_mbox()
264 			mport->inb_msg[mbox].mcback = NULL;  in rio_request_inb_mbox()
265 			mport->inb_msg[mbox].res = NULL;  in rio_request_inb_mbox()
270 		rc = -ENOMEM;  in rio_request_inb_mbox()
278  * rio_release_inb_mbox - release inbound mailbox message service
289 	if (!mport->ops->close_inb_mbox || !mport->inb_msg[mbox].res)  in rio_release_inb_mbox()
290 		return -EINVAL;  in rio_release_inb_mbox()
292 	mport->ops->close_inb_mbox(mport, mbox);  in rio_release_inb_mbox()
293 	mport->inb_msg[mbox].mcback = NULL;  in rio_release_inb_mbox()
295 	rc = release_resource(mport->inb_msg[mbox].res);  in rio_release_inb_mbox()
299 	kfree(mport->inb_msg[mbox].res);  in rio_release_inb_mbox()
300 	mport->inb_msg[mbox].res = NULL;  in rio_release_inb_mbox()
307  * rio_request_outb_mbox - request outbound mailbox service
309  * @dev_id: Device specific pointer to pass on event
315  * a callback function to the resource. Returns 0 on success.
323 	int rc = -ENOSYS;  in rio_request_outb_mbox()
326 	if (!mport->ops->open_outb_mbox)  in rio_request_outb_mbox()
334 		rc = request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE],  in rio_request_outb_mbox()
341 		mport->outb_msg[mbox].res = res;  in rio_request_outb_mbox()
344 		mport->outb_msg[mbox].mcback = moutb;  in rio_request_outb_mbox()
346 		rc = mport->ops->open_outb_mbox(mport, dev_id, mbox, entries);  in rio_request_outb_mbox()
348 			mport->outb_msg[mbox].mcback = NULL;  in rio_request_outb_mbox()
349 			mport->outb_msg[mbox].res = NULL;  in rio_request_outb_mbox()
354 		rc = -ENOMEM;  in rio_request_outb_mbox()
362  * rio_release_outb_mbox - release outbound mailbox message service
373 	if (!mport->ops->close_outb_mbox || !mport->outb_msg[mbox].res)  in rio_release_outb_mbox()
374 		return -EINVAL;  in rio_release_outb_mbox()
376 	mport->ops->close_outb_mbox(mport, mbox);  in rio_release_outb_mbox()
377 	mport->outb_msg[mbox].mcback = NULL;  in rio_release_outb_mbox()
379 	rc = release_resource(mport->outb_msg[mbox].res);  in rio_release_outb_mbox()
383 	kfree(mport->outb_msg[mbox].res);  in rio_release_outb_mbox()
384 	mport->outb_msg[mbox].res = NULL;  in rio_release_outb_mbox()
391  * rio_setup_inb_dbell - bind inbound doorbell callback
393  * @dev_id: Device specific pointer to pass on event
409 		return -ENOMEM;  in rio_setup_inb_dbell()
411 	dbell->res = res;  in rio_setup_inb_dbell()
412 	dbell->dinb = dinb;  in rio_setup_inb_dbell()
413 	dbell->dev_id = dev_id;  in rio_setup_inb_dbell()
415 	mutex_lock(&mport->lock);  in rio_setup_inb_dbell()
416 	list_add_tail(&dbell->node, &mport->dbells);  in rio_setup_inb_dbell()
417 	mutex_unlock(&mport->lock);  in rio_setup_inb_dbell()
422  * rio_request_inb_dbell - request inbound doorbell message service
424  * @dev_id: Device specific pointer to pass on event
447 		rc = request_resource(&mport->riores[RIO_DOORBELL_RESOURCE],  in rio_request_inb_dbell()
457 		rc = -ENOMEM;  in rio_request_inb_dbell()
465  * rio_release_inb_dbell - release inbound doorbell message service
479 	mutex_lock(&mport->lock);  in rio_release_inb_dbell()
480 	list_for_each_entry(dbell, &mport->dbells, node) {  in rio_release_inb_dbell()
481 		if ((dbell->res->start == start) && (dbell->res->end == end)) {  in rio_release_inb_dbell()
482 			list_del(&dbell->node);  in rio_release_inb_dbell()
487 	mutex_unlock(&mport->lock);  in rio_release_inb_dbell()
491 		rc = -EINVAL;  in rio_release_inb_dbell()
496 	rc = release_resource(dbell->res);  in rio_release_inb_dbell()
507  * rio_request_outb_dbell - request outbound doorbell message range
513  * if the request has been satisfied or %NULL on failure.
524 		if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res)  in rio_request_outb_dbell()
536  * rio_release_outb_dbell - release outbound doorbell message range
554  * rio_add_mport_pw_handler - add port-write message handler into the list
557  * @context: Handler specific context to pass on event
569 		return -ENOMEM;  in rio_add_mport_pw_handler()
571 	pwrite->pwcback = pwcback;  in rio_add_mport_pw_handler()
572 	pwrite->context = context;  in rio_add_mport_pw_handler()
573 	mutex_lock(&mport->lock);  in rio_add_mport_pw_handler()
574 	list_add_tail(&pwrite->node, &mport->pwrites);  in rio_add_mport_pw_handler()
575 	mutex_unlock(&mport->lock);  in rio_add_mport_pw_handler()
581  * rio_del_mport_pw_handler - remove port-write message handler from the list
584  * @context: Registered handler specific context to pass on event
593 	int rc = -EINVAL;  in rio_del_mport_pw_handler()
596 	mutex_lock(&mport->lock);  in rio_del_mport_pw_handler()
597 	list_for_each_entry(pwrite, &mport->pwrites, node) {  in rio_del_mport_pw_handler()
598 		if (pwrite->pwcback == pwcback && pwrite->context == context) {  in rio_del_mport_pw_handler()
599 			list_del(&pwrite->node);  in rio_del_mport_pw_handler()
605 	mutex_unlock(&mport->lock);  in rio_del_mport_pw_handler()
612  * rio_request_inb_pwrite - request inbound port-write message service for
614  * @rdev: RIO device to which register inbound port-write callback routine
615  * @pwcback: Callback routine to execute when port-write is received
617  * Binds a port-write callback function to the RapidIO device.
626 	if (rdev->pwcback)  in rio_request_inb_pwrite()
627 		rc = -ENOMEM;  in rio_request_inb_pwrite()
629 		rdev->pwcback = pwcback;  in rio_request_inb_pwrite()
637  * rio_release_inb_pwrite - release inbound port-write message service
639  * @rdev: RIO device which registered for inbound port-write callback
646 	int rc = -ENOMEM;  in rio_release_inb_pwrite()
649 	if (rdev->pwcback) {  in rio_release_inb_pwrite()
650 		rdev->pwcback = NULL;  in rio_release_inb_pwrite()
660  * rio_pw_enable - Enables/disables port-write handling by a master port
661  * @mport: Master port associated with port-write handling
666 	if (mport->ops->pwenable) {  in rio_pw_enable()
667 		mutex_lock(&mport->lock);  in rio_pw_enable()
669 		if ((enable && ++mport->pwe_refcnt == 1) ||  in rio_pw_enable()
670 		    (!enable && mport->pwe_refcnt && --mport->pwe_refcnt == 0))  in rio_pw_enable()
671 			mport->ops->pwenable(mport, enable);  in rio_pw_enable()
672 		mutex_unlock(&mport->lock);  in rio_pw_enable()
678  * rio_map_inb_region -- Map inbound memory region.
685  * Return: 0 -- Success.
695 	if (!mport->ops->map_inb)  in rio_map_inb_region()
696 		return -1;  in rio_map_inb_region()
698 	rc = mport->ops->map_inb(mport, local, rbase, size, rflags);  in rio_map_inb_region()
705  * rio_unmap_inb_region -- Unmap the inbound memory region
712 	if (!mport->ops->unmap_inb)  in rio_unmap_inb_region()
715 	mport->ops->unmap_inb(mport, lstart);  in rio_unmap_inb_region()
721  * rio_map_outb_region -- Map outbound memory region.
729  * Return: 0 -- Success.
739 	if (!mport->ops->map_outb)  in rio_map_outb_region()
740 		return -ENODEV;  in rio_map_outb_region()
743 	rc = mport->ops->map_outb(mport, destid, rbase, size,  in rio_map_outb_region()
752  * rio_unmap_outb_region -- Unmap the inbound memory region
761 	if (!mport->ops->unmap_outb)  in rio_unmap_outb_region()
765 	mport->ops->unmap_outb(mport, destid, rstart);  in rio_unmap_outb_region()
771  * rio_mport_get_physefb - Helper function that returns register offset
829  * rio_get_comptag - Begin or continue searching for a RIO device by component tag
837  * @from is not %NULL, searches continue from next device on the global
846 	n = from ? from->global_list.next : rio_devices.next;  in rio_get_comptag()
850 		if (rdev->comp_tag == comp_tag)  in rio_get_comptag()
852 		n = n->next;  in rio_get_comptag()
862  * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port.
887  * rio_enable_rx_tx_port - enable input receiver and output transmitter of
893  * @port_num: Port (-number on switch) to enable on a far end device
895  * Returns 0 or 1 from on General Control Command and Status Register
924 			return -EIO;  in rio_enable_rx_tx_port()
936 			return -EIO;  in rio_enable_rx_tx_port()
945  * rio_chk_dev_route - Validate route to the specified device.
947  * @nrdev: Last active device on the route to rdev
948  * @npnum: nrdev's port number on the route to rdev
951  * device (and corresponding RIO port) on the route.
957 	int p_port, rc = -EIO;  in rio_chk_dev_route()
961 	while (rdev->prev && (rdev->prev->pef & RIO_PEF_SWITCH)) {  in rio_chk_dev_route()
962 		if (!rio_read_config_32(rdev->prev, RIO_DEV_ID_CAR, &result)) {  in rio_chk_dev_route()
963 			prev = rdev->prev;  in rio_chk_dev_route()
966 		rdev = rdev->prev;  in rio_chk_dev_route()
972 	p_port = prev->rswitch->route_table[rdev->destid];  in rio_chk_dev_route()
975 		pr_debug("RIO: link failed on [%s]-P%d\n",  in rio_chk_dev_route()
987  * rio_mport_chk_dev_access - Validate access to the specified device.
1002 			return -EIO;  in rio_mport_chk_dev_access()
1011  * rio_chk_dev_access - Validate access to the specified device.
1016 	return rio_mport_chk_dev_access(rdev->net->hport,  in rio_chk_dev_access()
1017 					rdev->destid, rdev->hopcount);  in rio_chk_dev_access()
1021  * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and
1022  *                        returns link-response (if requested).
1023  * @rdev: RIO devive to issue Input-status command
1042 	/* Issue Input-status command */  in rio_get_input_status()
1052 	while (checkcount--) {  in rio_get_input_status()
1063 	return -EIO;  in rio_get_input_status()
1067  * rio_clr_err_stopped - Clears port Error-stopped states.
1076  * IDT gen3 switch driver now implements HW-specific error handler that
1081 	struct rio_dev *nextdev = rdev->rswitch->nextdev[pnum];  in rio_clr_err_stopped()
1091 		pr_debug("RIO_EM: servicing Output Error-Stopped state\n");  in rio_clr_err_stopped()
1093 		 * Send a Link-Request/Input-Status control symbol  in rio_clr_err_stopped()
1096 			pr_debug("RIO_EM: Input-status response timeout\n");  in rio_clr_err_stopped()
1100 		pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n",  in rio_clr_err_stopped()
1137 					RIO_GET_PORT_NUM(nextdev->swpinfo)),  in rio_clr_err_stopped()
1148 		pr_debug("RIO_EM: servicing Input Error-Stopped state\n");  in rio_clr_err_stopped()
1150 				     RIO_GET_PORT_NUM(nextdev->swpinfo), NULL);  in rio_clr_err_stopped()
1163  * rio_inb_pwrite_handler - inbound port-write message handler
1164  * @mport:  mport device associated with port-write
1165  * @pw_msg: pointer to inbound port-write message
1167  * Processes an inbound port-write message. Returns 0 if the request
1181 		pr_debug("%s: PW to mport_%d:\n", __func__, mport->id);  in rio_inb_pwrite_handler()
1184 				i * 4, pw_msg->raw[i], pw_msg->raw[i + 1],  in rio_inb_pwrite_handler()
1185 				pw_msg->raw[i + 2], pw_msg->raw[i + 3]);  in rio_inb_pwrite_handler()
1190 	rdev = rio_get_comptag((pw_msg->em.comptag & RIO_CTAG_UDEVID), NULL);  in rio_inb_pwrite_handler()
1192 		pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev));  in rio_inb_pwrite_handler()
1194 		pr_debug("RIO: %s No matching device for CTag 0x%08x\n",  in rio_inb_pwrite_handler()
1195 			__func__, pw_msg->em.comptag);  in rio_inb_pwrite_handler()
1198 	/* Call a device-specific handler (if it is registered for the device).  in rio_inb_pwrite_handler()
1199 	 * This may be the service for endpoints that send device-specific  in rio_inb_pwrite_handler()
1200 	 * port-write messages. End-point messages expected to be handled  in rio_inb_pwrite_handler()
1202 	 * For switches rc==0 signals that no standard processing required.  in rio_inb_pwrite_handler()
1204 	if (rdev && rdev->pwcback) {  in rio_inb_pwrite_handler()
1205 		rc = rdev->pwcback(rdev, pw_msg, 0);  in rio_inb_pwrite_handler()
1210 	mutex_lock(&mport->lock);  in rio_inb_pwrite_handler()
1211 	list_for_each_entry(pwrite, &mport->pwrites, node)  in rio_inb_pwrite_handler()
1212 		pwrite->pwcback(mport, pwrite->context, pw_msg, 0);  in rio_inb_pwrite_handler()
1213 	mutex_unlock(&mport->lock);  in rio_inb_pwrite_handler()
1220 	 * how to do default PW handling in combination with per-mport callbacks  in rio_inb_pwrite_handler()
1223 	portnum = pw_msg->em.is_port & 0xFF;  in rio_inb_pwrite_handler()
1230 		pr_debug("RIO: device access failed - get link partner\n");  in rio_inb_pwrite_handler()
1231 		/* Scan route to the device and identify failed link.  in rio_inb_pwrite_handler()
1238 			return -EIO;  in rio_inb_pwrite_handler()
1243 	/* For End-point devices processing stops here */  in rio_inb_pwrite_handler()
1244 	if (!(rdev->pef & RIO_PEF_SWITCH))  in rio_inb_pwrite_handler()
1247 	if (rdev->phys_efptr == 0) {  in rio_inb_pwrite_handler()
1254 	 * Process the port-write notification from switch  in rio_inb_pwrite_handler()
1256 	if (rdev->rswitch->ops && rdev->rswitch->ops->em_handle)  in rio_inb_pwrite_handler()
1257 		rdev->rswitch->ops->em_handle(rdev, portnum);  in rio_inb_pwrite_handler()
1265 		if (!(rdev->rswitch->port_ok & (1 << portnum))) {  in rio_inb_pwrite_handler()
1266 			rdev->rswitch->port_ok |= (1 << portnum);  in rio_inb_pwrite_handler()
1269 			pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n",  in rio_inb_pwrite_handler()
1273 		/* Clear error-stopped states (if reported).  in rio_inb_pwrite_handler()
1274 		 * Depending on the link partner state, two attempts  in rio_inb_pwrite_handler()
1284 		if (rdev->rswitch->port_ok & (1 << portnum)) {  in rio_inb_pwrite_handler()
1285 			rdev->rswitch->port_ok &= ~(1 << portnum);  in rio_inb_pwrite_handler()
1288 			if (rdev->phys_rmap == 1) {  in rio_inb_pwrite_handler()
1302 			pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n",  in rio_inb_pwrite_handler()
1308 		rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet);  in rio_inb_pwrite_handler()
1314 			rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0);  in rio_inb_pwrite_handler()
1318 		rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet);  in rio_inb_pwrite_handler()
1324 			rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0);  in rio_inb_pwrite_handler()
1327 	/* Clear remaining error bits and Port-Write Pending bit */  in rio_inb_pwrite_handler()
1336  * rio_mport_get_efb - get pointer to next extended features block
1370  * rio_mport_get_feature - query for devices' extended features
1416  * rio_std_route_add_entry - Add switch route table entry using standard
1421  * @table: routing table ID (global or port-specific)
1443  * rio_std_route_get_entry - Read switch route table entry (port number)
1449  * @table: routing table ID (global or port-specific)
1472  * rio_std_route_clr_table - Clear swotch route table using standard registers
1477  * @table: routing table ID (global or port-specific)
1491 		if (mport->sys_size) {  in rio_std_route_clr_table()
1523  * rio_lock_device - Acquires host device lock for specified device
1527  * @wait_ms: Max wait time in msec (0 = no timeout)
1540 				  RIO_HOST_DID_LOCK_CSR, port->host_deviceid);  in rio_lock_device()
1544 	while (result != port->host_deviceid) {  in rio_lock_device()
1548 			return -EINVAL;  in rio_lock_device()
1558 			port->host_deviceid);  in rio_lock_device()
1569  * rio_unlock_device - Releases host device lock for specified device
1584 				  port->host_deviceid);  in rio_unlock_device()
1590 		return -EINVAL;  in rio_unlock_device()
1598  * rio_route_add_entry- Add a route entry to a switch routing table
1603  * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock)
1612  * Returns %0 on success or %-EINVAL on failure.
1617 	int rc = -EINVAL;  in rio_route_add_entry()
1618 	struct rio_switch_ops *ops = rdev->rswitch->ops;  in rio_route_add_entry()
1621 		rc = rio_lock_device(rdev->net->hport, rdev->destid,  in rio_route_add_entry()
1622 				     rdev->hopcount, 1000);  in rio_route_add_entry()
1627 	spin_lock(&rdev->rswitch->lock);  in rio_route_add_entry()
1629 	if (!ops || !ops->add_entry) {  in rio_route_add_entry()
1630 		rc = rio_std_route_add_entry(rdev->net->hport, rdev->destid,  in rio_route_add_entry()
1631 					     rdev->hopcount, table,  in rio_route_add_entry()
1633 	} else if (try_module_get(ops->owner)) {  in rio_route_add_entry()
1634 		rc = ops->add_entry(rdev->net->hport, rdev->destid,  in rio_route_add_entry()
1635 				    rdev->hopcount, table, route_destid,  in rio_route_add_entry()
1637 		module_put(ops->owner);  in rio_route_add_entry()
1640 	spin_unlock(&rdev->rswitch->lock);  in rio_route_add_entry()
1643 		rio_unlock_device(rdev->net->hport, rdev->destid,  in rio_route_add_entry()
1644 				  rdev->hopcount);  in rio_route_add_entry()
1651  * rio_route_get_entry- Read an entry from a switch routing table
1656  * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock)
1665  * Returns %0 on success or %-EINVAL on failure.
1670 	int rc = -EINVAL;  in rio_route_get_entry()
1671 	struct rio_switch_ops *ops = rdev->rswitch->ops;  in rio_route_get_entry()
1674 		rc = rio_lock_device(rdev->net->hport, rdev->destid,  in rio_route_get_entry()
1675 				     rdev->hopcount, 1000);  in rio_route_get_entry()
1680 	spin_lock(&rdev->rswitch->lock);  in rio_route_get_entry()
1682 	if (!ops || !ops->get_entry) {  in rio_route_get_entry()
1683 		rc = rio_std_route_get_entry(rdev->net->hport, rdev->destid,  in rio_route_get_entry()
1684 					     rdev->hopcount, table,  in rio_route_get_entry()
1686 	} else if (try_module_get(ops->owner)) {  in rio_route_get_entry()
1687 		rc = ops->get_entry(rdev->net->hport, rdev->destid,  in rio_route_get_entry()
1688 				    rdev->hopcount, table, route_destid,  in rio_route_get_entry()
1690 		module_put(ops->owner);  in rio_route_get_entry()
1693 	spin_unlock(&rdev->rswitch->lock);  in rio_route_get_entry()
1696 		rio_unlock_device(rdev->net->hport, rdev->destid,  in rio_route_get_entry()
1697 				  rdev->hopcount);  in rio_route_get_entry()
1703  * rio_route_clr_table - Clear a switch routing table
1706  * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock)
1714  * Returns %0 on success or %-EINVAL on failure.
1718 	int rc = -EINVAL;  in rio_route_clr_table()
1719 	struct rio_switch_ops *ops = rdev->rswitch->ops;  in rio_route_clr_table()
1722 		rc = rio_lock_device(rdev->net->hport, rdev->destid,  in rio_route_clr_table()
1723 				     rdev->hopcount, 1000);  in rio_route_clr_table()
1728 	spin_lock(&rdev->rswitch->lock);  in rio_route_clr_table()
1730 	if (!ops || !ops->clr_table) {  in rio_route_clr_table()
1731 		rc = rio_std_route_clr_table(rdev->net->hport, rdev->destid,  in rio_route_clr_table()
1732 					     rdev->hopcount, table);  in rio_route_clr_table()
1733 	} else if (try_module_get(ops->owner)) {  in rio_route_clr_table()
1734 		rc = ops->clr_table(rdev->net->hport, rdev->destid,  in rio_route_clr_table()
1735 				    rdev->hopcount, table);  in rio_route_clr_table()
1737 		module_put(ops->owner);  in rio_route_clr_table()
1740 	spin_unlock(&rdev->rswitch->lock);  in rio_route_clr_table()
1743 		rio_unlock_device(rdev->net->hport, rdev->destid,  in rio_route_clr_table()
1744 				  rdev->hopcount);  in rio_route_clr_table()
1757 	return mport == container_of(chan->device, struct rio_mport, dma);  in rio_chan_filter()
1761  * rio_request_mport_dma - request RapidIO capable DMA channel associated
1778  * rio_release_dma - release specified DMA channel
1788  * rio_dma_prep_xfer - RapidIO specific wrapper
1801  *          error-valued pointer or NULL if failed.
1809 	if (!dchan->device->device_prep_slave_sg) {  in rio_dma_prep_xfer()
1815 	rio_ext.rio_addr_u = data->rio_addr_u;  in rio_dma_prep_xfer()
1816 	rio_ext.rio_addr = data->rio_addr;  in rio_dma_prep_xfer()
1817 	rio_ext.wr_type = data->wr_type;  in rio_dma_prep_xfer()
1819 	return dmaengine_prep_rio_sg(dchan, data->sg, data->sg_len,  in rio_dma_prep_xfer()
1827  * rio_register_scan - enumeration/discovery method registration interface
1828  * @mport_id: mport device ID for which fabric scan routine has to be set
1837  * In case of RIO_MPORT_ANY skips mports with valid scan routines (no error).
1842 	struct rio_scan_node *scan;  in rio_register_scan()  local
1849 		return -EINVAL;  in rio_register_scan()
1858 	list_for_each_entry(scan, &rio_scans, node) {  in rio_register_scan()
1859 		if (scan->mport_id == mport_id) {  in rio_register_scan()
1860 			rc = -EBUSY;  in rio_register_scan()
1866 	 * Allocate and initialize new scan registration node.  in rio_register_scan()
1868 	scan = kzalloc(sizeof(*scan), GFP_KERNEL);  in rio_register_scan()
1869 	if (!scan) {  in rio_register_scan()
1870 		rc = -ENOMEM;  in rio_register_scan()
1874 	scan->mport_id = mport_id;  in rio_register_scan()
1875 	scan->ops = scan_ops;  in rio_register_scan()
1878 	 * Traverse the list of registered mports to attach this new scan.  in rio_register_scan()
1880 	 * The new scan with matching mport ID overrides any previously attached  in rio_register_scan()
1881 	 * scan assuming that old scan (if any) is the default one (based on the  in rio_register_scan()
1883 	 * If the new scan is the global one, it will be attached only to mports  in rio_register_scan()
1887 		if (port->id == mport_id) {  in rio_register_scan()
1888 			port->nscan = scan_ops;  in rio_register_scan()
1890 		} else if (mport_id == RIO_MPORT_ANY && !port->nscan)  in rio_register_scan()
1891 			port->nscan = scan_ops;  in rio_register_scan()
1894 	list_add_tail(&scan->node, &rio_scans);  in rio_register_scan()
1904  * rio_mport_scan - execute enumeration/discovery on the specified mport
1914 		if (port->id == mport_id)  in rio_mport_scan()
1918 	return -ENODEV;  in rio_mport_scan()
1920 	if (!port->nscan) {  in rio_mport_scan()
1922 		return -EINVAL;  in rio_mport_scan()
1925 	if (!try_module_get(port->nscan->owner)) {  in rio_mport_scan()
1927 		return -ENODEV;  in rio_mport_scan()
1932 	if (port->host_deviceid >= 0)  in rio_mport_scan()
1933 		rc = port->nscan->enumerate(port, 0);  in rio_mport_scan()
1935 		rc = port->nscan->discover(port, RIO_SCAN_ENUM_NO_WAIT);  in rio_mport_scan()
1937 	module_put(port->nscan->owner);  in rio_mport_scan()
1954 		 work->mport->id, work->mport->name);  in disc_work_handler()
1955 	if (try_module_get(work->mport->nscan->owner)) {  in disc_work_handler()
1956 		work->mport->nscan->discover(work->mport, 0);  in disc_work_handler()
1957 		module_put(work->mport->nscan->owner);  in disc_work_handler()
1968 		return -ENODEV;  in rio_init_mports()
1972 	 * on any of the registered mports.  in rio_init_mports()
1976 		if (port->host_deviceid >= 0) {  in rio_init_mports()
1977 			if (port->nscan && try_module_get(port->nscan->owner)) {  in rio_init_mports()
1978 				port->nscan->enumerate(port, 0);  in rio_init_mports()
1979 				module_put(port->nscan->owner);  in rio_init_mports()
2012 		if (port->host_deviceid < 0 && port->nscan) {  in rio_init_mports()
2034 		return -1;  in rio_get_hdid()
2043 		return -ENODEV;  in rio_mport_initialize()
2046 	atomic_set(&mport->state, RIO_DEVICE_INITIALIZING);  in rio_mport_initialize()
2047 	mport->id = next_portid++;  in rio_mport_initialize()
2048 	mport->host_deviceid = rio_get_hdid(mport->id);  in rio_mport_initialize()
2049 	mport->nscan = NULL;  in rio_mport_initialize()
2050 	mutex_init(&mport->lock);  in rio_mport_initialize()
2051 	mport->pwe_refcnt = 0;  in rio_mport_initialize()
2052 	INIT_LIST_HEAD(&mport->pwrites);  in rio_mport_initialize()
2060 	struct rio_scan_node *scan = NULL;  in rio_register_mport()  local
2069 	list_for_each_entry(scan, &rio_scans, node) {  in rio_register_mport()
2070 		if (port->id == scan->mport_id ||  in rio_register_mport()
2071 		    scan->mport_id == RIO_MPORT_ANY) {  in rio_register_mport()
2072 			port->nscan = scan->ops;  in rio_register_mport()
2073 			if (port->id == scan->mport_id)  in rio_register_mport()
2078 	list_add_tail(&port->node, &rio_mports);  in rio_register_mport()
2081 	dev_set_name(&port->dev, "rapidio%d", port->id);  in rio_register_mport()
2082 	port->dev.class = &rio_mport_class;  in rio_register_mport()
2083 	atomic_set(&port->state, RIO_DEVICE_RUNNING);  in rio_register_mport()
2085 	res = device_register(&port->dev);  in rio_register_mport()
2087 		dev_err(&port->dev, "RIO: mport%d registration failed ERR=%d\n",  in rio_register_mport()
2088 			port->id, res);  in rio_register_mport()
2090 		list_del(&port->node);  in rio_register_mport()
2092 		put_device(&port->dev);  in rio_register_mport()
2094 		dev_dbg(&port->dev, "RIO: registered mport%d\n", port->id);  in rio_register_mport()
2105 	if (dev->bus == &rio_bus_type)  in rio_mport_cleanup_callback()
2113 	 * Unregister all RapidIO devices residing on this net (this will  in rio_net_remove_children()
2116 	device_for_each_child(&net->dev, NULL, rio_mport_cleanup_callback);  in rio_net_remove_children()
2122 	pr_debug("RIO: %s %s id=%d\n", __func__, port->name, port->id);  in rio_unregister_mport()
2125 	if (atomic_cmpxchg(&port->state,  in rio_unregister_mport()
2129 			__func__, port->name);  in rio_unregister_mport()
2132 	if (port->net && port->net->hport == port) {  in rio_unregister_mport()
2133 		rio_net_remove_children(port->net);  in rio_unregister_mport()
2134 		rio_free_net(port->net);  in rio_unregister_mport()
2142 	list_del(&port->node);  in rio_unregister_mport()
2144 	device_unregister(&port->dev);  in rio_unregister_mport()