2 * RapidIO interconnect services
3 * (RapidIO Interconnect Specification, http://www.rapidio.org)
5 * Copyright 2005 MontaVista Software, Inc.
6 * Matt Porter <mporter@kernel.crashing.org>
8 * Copyright 2009 - 2013 Integrated Device Technology, Inc.
9 * Alex Bounine <alexandre.bounine@idt.com>
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
17 #include <linux/types.h>
18 #include <linux/kernel.h>
20 #include <linux/delay.h>
21 #include <linux/init.h>
22 #include <linux/rio.h>
23 #include <linux/rio_drv.h>
24 #include <linux/rio_ids.h>
25 #include <linux/rio_regs.h>
26 #include <linux/module.h>
27 #include <linux/spinlock.h>
28 #include <linux/slab.h>
29 #include <linux/interrupt.h>
33 MODULE_DESCRIPTION("RapidIO Subsystem Core");
34 MODULE_AUTHOR("Matt Porter <mporter@kernel.crashing.org>");
35 MODULE_AUTHOR("Alexandre Bounine <alexandre.bounine@idt.com>");
36 MODULE_LICENSE("GPL");
38 static int hdid[RIO_MAX_MPORTS];
40 module_param_array(hdid, int, &ids_num, 0);
41 MODULE_PARM_DESC(hdid,
42 "Destination ID assignment to local RapidIO controllers");
44 static LIST_HEAD(rio_devices);
45 static LIST_HEAD(rio_nets);
46 static DEFINE_SPINLOCK(rio_global_list_lock);
48 static LIST_HEAD(rio_mports);
49 static LIST_HEAD(rio_scans);
50 static DEFINE_MUTEX(rio_mport_list_lock);
51 static unsigned char next_portid;
52 static DEFINE_SPINLOCK(rio_mmap_lock);
55 * rio_local_get_device_id - Get the base/extended device id for a port
56 * @port: RIO master port from which to get the deviceid
58 * Reads the base/extended device id from the local device
59 * implementing the master port. Returns the 8/16-bit device
62 u16 rio_local_get_device_id(struct rio_mport *port)
66 rio_local_read_config_32(port, RIO_DID_CSR, &result);
68 return (RIO_GET_DID(port->sys_size, result));
72 * rio_query_mport - Query mport device attributes
73 * @port: mport device to query
74 * @mport_attr: mport attributes data structure
76 * Returns attributes of specified mport through the
77 * pointer to attributes data structure.
79 int rio_query_mport(struct rio_mport *port,
80 struct rio_mport_attr *mport_attr)
82 if (!port->ops->query_mport)
84 return port->ops->query_mport(port, mport_attr);
86 EXPORT_SYMBOL(rio_query_mport);
89 * rio_alloc_net- Allocate and initialize a new RIO network data structure
90 * @mport: Master port associated with the RIO network
92 * Allocates a RIO network structure, initializes per-network
93 * list heads, and adds the associated master port to the
94 * network list of associated master ports. Returns a
95 * RIO network pointer on success or %NULL on failure.
97 struct rio_net *rio_alloc_net(struct rio_mport *mport)
101 net = kzalloc(sizeof(struct rio_net), GFP_KERNEL);
103 INIT_LIST_HEAD(&net->node);
104 INIT_LIST_HEAD(&net->devices);
105 INIT_LIST_HEAD(&net->switches);
106 INIT_LIST_HEAD(&net->mports);
111 EXPORT_SYMBOL_GPL(rio_alloc_net);
113 int rio_add_net(struct rio_net *net)
117 err = device_register(&net->dev);
120 spin_lock(&rio_global_list_lock);
121 list_add_tail(&net->node, &rio_nets);
122 spin_unlock(&rio_global_list_lock);
126 EXPORT_SYMBOL_GPL(rio_add_net);
128 void rio_free_net(struct rio_net *net)
130 spin_lock(&rio_global_list_lock);
131 if (!list_empty(&net->node))
132 list_del(&net->node);
133 spin_unlock(&rio_global_list_lock);
136 device_unregister(&net->dev);
138 EXPORT_SYMBOL_GPL(rio_free_net);
141 * rio_add_device- Adds a RIO device to the device model
144 * Adds the RIO device to the global device list and adds the RIO
145 * device to the RIO device list. Creates the generic sysfs nodes
148 int rio_add_device(struct rio_dev *rdev)
152 atomic_set(&rdev->state, RIO_DEVICE_RUNNING);
153 err = device_register(&rdev->dev);
157 spin_lock(&rio_global_list_lock);
158 list_add_tail(&rdev->global_list, &rio_devices);
160 list_add_tail(&rdev->net_list, &rdev->net->devices);
161 if (rdev->pef & RIO_PEF_SWITCH)
162 list_add_tail(&rdev->rswitch->node,
163 &rdev->net->switches);
165 spin_unlock(&rio_global_list_lock);
167 rio_create_sysfs_dev_files(rdev);
171 EXPORT_SYMBOL_GPL(rio_add_device);
174 * rio_del_device - removes a RIO device from the device model
176 * @state: device state to set during removal process
178 * Removes the RIO device to the kernel device list and subsystem's device list.
179 * Clears sysfs entries for the removed device.
181 void rio_del_device(struct rio_dev *rdev, enum rio_device_state state)
183 pr_debug("RIO: %s: removing %s\n", __func__, rio_name(rdev));
184 atomic_set(&rdev->state, state);
185 spin_lock(&rio_global_list_lock);
186 list_del(&rdev->global_list);
188 list_del(&rdev->net_list);
189 if (rdev->pef & RIO_PEF_SWITCH) {
190 list_del(&rdev->rswitch->node);
191 kfree(rdev->rswitch->route_table);
194 spin_unlock(&rio_global_list_lock);
195 rio_remove_sysfs_dev_files(rdev);
196 device_unregister(&rdev->dev);
198 EXPORT_SYMBOL_GPL(rio_del_device);
201 * rio_request_inb_mbox - request inbound mailbox service
202 * @mport: RIO master port from which to allocate the mailbox resource
203 * @dev_id: Device specific pointer to pass on event
204 * @mbox: Mailbox number to claim
205 * @entries: Number of entries in inbound mailbox queue
206 * @minb: Callback to execute when inbound message is received
208 * Requests ownership of an inbound mailbox resource and binds
209 * a callback function to the resource. Returns %0 on success.
211 int rio_request_inb_mbox(struct rio_mport *mport,
215 void (*minb) (struct rio_mport * mport, void *dev_id, int mbox,
219 struct resource *res;
221 if (mport->ops->open_inb_mbox == NULL)
224 res = kzalloc(sizeof(struct resource), GFP_KERNEL);
227 rio_init_mbox_res(res, mbox, mbox);
229 /* Make sure this mailbox isn't in use */
231 request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE],
237 mport->inb_msg[mbox].res = res;
239 /* Hook the inbound message callback */
240 mport->inb_msg[mbox].mcback = minb;
242 rc = mport->ops->open_inb_mbox(mport, dev_id, mbox, entries);
251 * rio_release_inb_mbox - release inbound mailbox message service
252 * @mport: RIO master port from which to release the mailbox resource
253 * @mbox: Mailbox number to release
255 * Releases ownership of an inbound mailbox resource. Returns 0
256 * if the request has been satisfied.
258 int rio_release_inb_mbox(struct rio_mport *mport, int mbox)
260 if (mport->ops->close_inb_mbox) {
261 mport->ops->close_inb_mbox(mport, mbox);
263 /* Release the mailbox resource */
264 return release_resource(mport->inb_msg[mbox].res);
270 * rio_request_outb_mbox - request outbound mailbox service
271 * @mport: RIO master port from which to allocate the mailbox resource
272 * @dev_id: Device specific pointer to pass on event
273 * @mbox: Mailbox number to claim
274 * @entries: Number of entries in outbound mailbox queue
275 * @moutb: Callback to execute when outbound message is sent
277 * Requests ownership of an outbound mailbox resource and binds
278 * a callback function to the resource. Returns 0 on success.
280 int rio_request_outb_mbox(struct rio_mport *mport,
284 void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot))
287 struct resource *res;
289 if (mport->ops->open_outb_mbox == NULL)
292 res = kzalloc(sizeof(struct resource), GFP_KERNEL);
295 rio_init_mbox_res(res, mbox, mbox);
297 /* Make sure this outbound mailbox isn't in use */
299 request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE],
305 mport->outb_msg[mbox].res = res;
307 /* Hook the inbound message callback */
308 mport->outb_msg[mbox].mcback = moutb;
310 rc = mport->ops->open_outb_mbox(mport, dev_id, mbox, entries);
319 * rio_release_outb_mbox - release outbound mailbox message service
320 * @mport: RIO master port from which to release the mailbox resource
321 * @mbox: Mailbox number to release
323 * Releases ownership of an inbound mailbox resource. Returns 0
324 * if the request has been satisfied.
326 int rio_release_outb_mbox(struct rio_mport *mport, int mbox)
328 if (mport->ops->close_outb_mbox) {
329 mport->ops->close_outb_mbox(mport, mbox);
331 /* Release the mailbox resource */
332 return release_resource(mport->outb_msg[mbox].res);
338 * rio_setup_inb_dbell - bind inbound doorbell callback
339 * @mport: RIO master port to bind the doorbell callback
340 * @dev_id: Device specific pointer to pass on event
341 * @res: Doorbell message resource
342 * @dinb: Callback to execute when doorbell is received
344 * Adds a doorbell resource/callback pair into a port's
345 * doorbell event list. Returns 0 if the request has been
349 rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res,
350 void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst,
354 struct rio_dbell *dbell;
356 if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) {
363 dbell->dev_id = dev_id;
365 list_add_tail(&dbell->node, &mport->dbells);
372 * rio_request_inb_dbell - request inbound doorbell message service
373 * @mport: RIO master port from which to allocate the doorbell resource
374 * @dev_id: Device specific pointer to pass on event
375 * @start: Doorbell info range start
376 * @end: Doorbell info range end
377 * @dinb: Callback to execute when doorbell is received
379 * Requests ownership of an inbound doorbell resource and binds
380 * a callback function to the resource. Returns 0 if the request
381 * has been satisfied.
383 int rio_request_inb_dbell(struct rio_mport *mport,
387 void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src,
392 struct resource *res = kzalloc(sizeof(struct resource), GFP_KERNEL);
395 rio_init_dbell_res(res, start, end);
397 /* Make sure these doorbells aren't in use */
399 request_resource(&mport->riores[RIO_DOORBELL_RESOURCE],
405 /* Hook the doorbell callback */
406 rc = rio_setup_inb_dbell(mport, dev_id, res, dinb);
415 * rio_release_inb_dbell - release inbound doorbell message service
416 * @mport: RIO master port from which to release the doorbell resource
417 * @start: Doorbell info range start
418 * @end: Doorbell info range end
420 * Releases ownership of an inbound doorbell resource and removes
421 * callback from the doorbell event list. Returns 0 if the request
422 * has been satisfied.
424 int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end)
426 int rc = 0, found = 0;
427 struct rio_dbell *dbell;
429 list_for_each_entry(dbell, &mport->dbells, node) {
430 if ((dbell->res->start == start) && (dbell->res->end == end)) {
436 /* If we can't find an exact match, fail */
442 /* Delete from list */
443 list_del(&dbell->node);
445 /* Release the doorbell resource */
446 rc = release_resource(dbell->res);
448 /* Free the doorbell event */
456 * rio_request_outb_dbell - request outbound doorbell message range
457 * @rdev: RIO device from which to allocate the doorbell resource
458 * @start: Doorbell message range start
459 * @end: Doorbell message range end
461 * Requests ownership of a doorbell message range. Returns a resource
462 * if the request has been satisfied or %NULL on failure.
464 struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start,
467 struct resource *res = kzalloc(sizeof(struct resource), GFP_KERNEL);
470 rio_init_dbell_res(res, start, end);
472 /* Make sure these doorbells aren't in use */
473 if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res)
484 * rio_release_outb_dbell - release outbound doorbell message range
485 * @rdev: RIO device from which to release the doorbell resource
486 * @res: Doorbell resource to be freed
488 * Releases ownership of a doorbell message range. Returns 0 if the
489 * request has been satisfied.
491 int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res)
493 int rc = release_resource(res);
501 * rio_request_inb_pwrite - request inbound port-write message service
502 * @rdev: RIO device to which register inbound port-write callback routine
503 * @pwcback: Callback routine to execute when port-write is received
505 * Binds a port-write callback function to the RapidIO device.
506 * Returns 0 if the request has been satisfied.
508 int rio_request_inb_pwrite(struct rio_dev *rdev,
509 int (*pwcback)(struct rio_dev *rdev, union rio_pw_msg *msg, int step))
513 spin_lock(&rio_global_list_lock);
514 if (rdev->pwcback != NULL)
517 rdev->pwcback = pwcback;
519 spin_unlock(&rio_global_list_lock);
522 EXPORT_SYMBOL_GPL(rio_request_inb_pwrite);
525 * rio_release_inb_pwrite - release inbound port-write message service
526 * @rdev: RIO device which registered for inbound port-write callback
528 * Removes callback from the rio_dev structure. Returns 0 if the request
529 * has been satisfied.
531 int rio_release_inb_pwrite(struct rio_dev *rdev)
535 spin_lock(&rio_global_list_lock);
537 rdev->pwcback = NULL;
541 spin_unlock(&rio_global_list_lock);
544 EXPORT_SYMBOL_GPL(rio_release_inb_pwrite);
547 * rio_map_inb_region -- Map inbound memory region.
548 * @mport: Master port.
549 * @local: physical address of memory region to be mapped
550 * @rbase: RIO base address assigned to this window
551 * @size: Size of the memory region
552 * @rflags: Flags for mapping.
554 * Return: 0 -- Success.
556 * This function will create the mapping from RIO space to local memory.
558 int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local,
559 u64 rbase, u32 size, u32 rflags)
564 if (!mport->ops->map_inb)
566 spin_lock_irqsave(&rio_mmap_lock, flags);
567 rc = mport->ops->map_inb(mport, local, rbase, size, rflags);
568 spin_unlock_irqrestore(&rio_mmap_lock, flags);
571 EXPORT_SYMBOL_GPL(rio_map_inb_region);
574 * rio_unmap_inb_region -- Unmap the inbound memory region
575 * @mport: Master port
576 * @lstart: physical address of memory region to be unmapped
578 void rio_unmap_inb_region(struct rio_mport *mport, dma_addr_t lstart)
581 if (!mport->ops->unmap_inb)
583 spin_lock_irqsave(&rio_mmap_lock, flags);
584 mport->ops->unmap_inb(mport, lstart);
585 spin_unlock_irqrestore(&rio_mmap_lock, flags);
587 EXPORT_SYMBOL_GPL(rio_unmap_inb_region);
590 * rio_mport_get_physefb - Helper function that returns register offset
591 * for Physical Layer Extended Features Block.
592 * @port: Master port to issue transaction
593 * @local: Indicate a local master port or remote device access
594 * @destid: Destination ID of the device
595 * @hopcount: Number of switch hops to the device
598 rio_mport_get_physefb(struct rio_mport *port, int local,
599 u16 destid, u8 hopcount)
604 ext_ftr_ptr = rio_mport_get_efb(port, local, destid, hopcount, 0);
606 while (ext_ftr_ptr) {
608 rio_local_read_config_32(port, ext_ftr_ptr,
611 rio_mport_read_config_32(port, destid, hopcount,
612 ext_ftr_ptr, &ftr_header);
614 ftr_header = RIO_GET_BLOCK_ID(ftr_header);
615 switch (ftr_header) {
617 case RIO_EFB_SER_EP_ID_V13P:
618 case RIO_EFB_SER_EP_REC_ID_V13P:
619 case RIO_EFB_SER_EP_FREE_ID_V13P:
620 case RIO_EFB_SER_EP_ID:
621 case RIO_EFB_SER_EP_REC_ID:
622 case RIO_EFB_SER_EP_FREE_ID:
623 case RIO_EFB_SER_EP_FREC_ID:
631 ext_ftr_ptr = rio_mport_get_efb(port, local, destid,
632 hopcount, ext_ftr_ptr);
637 EXPORT_SYMBOL_GPL(rio_mport_get_physefb);
640 * rio_get_comptag - Begin or continue searching for a RIO device by component tag
641 * @comp_tag: RIO component tag to match
642 * @from: Previous RIO device found in search, or %NULL for new search
644 * Iterates through the list of known RIO devices. If a RIO device is
645 * found with a matching @comp_tag, a pointer to its device
646 * structure is returned. Otherwise, %NULL is returned. A new search
647 * is initiated by passing %NULL to the @from argument. Otherwise, if
648 * @from is not %NULL, searches continue from next device on the global
651 struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from)
654 struct rio_dev *rdev;
656 spin_lock(&rio_global_list_lock);
657 n = from ? from->global_list.next : rio_devices.next;
659 while (n && (n != &rio_devices)) {
661 if (rdev->comp_tag == comp_tag)
667 spin_unlock(&rio_global_list_lock);
670 EXPORT_SYMBOL_GPL(rio_get_comptag);
673 * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port.
674 * @rdev: Pointer to RIO device control structure
675 * @pnum: Switch port number to set LOCKOUT bit
676 * @lock: Operation : set (=1) or clear (=0)
678 int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock)
682 rio_read_config_32(rdev,
683 rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum),
686 regval |= RIO_PORT_N_CTL_LOCKOUT;
688 regval &= ~RIO_PORT_N_CTL_LOCKOUT;
690 rio_write_config_32(rdev,
691 rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum),
695 EXPORT_SYMBOL_GPL(rio_set_port_lockout);
698 * rio_enable_rx_tx_port - enable input receiver and output transmitter of
700 * @port: Master port associated with the RIO network
701 * @local: local=1 select local port otherwise a far device is reached
702 * @destid: Destination ID of the device to check host bit
703 * @hopcount: Number of hops to reach the target
704 * @port_num: Port (-number on switch) to enable on a far end device
706 * Returns 0 or 1 from on General Control Command and Status Register
709 int rio_enable_rx_tx_port(struct rio_mport *port,
710 int local, u16 destid,
711 u8 hopcount, u8 port_num)
713 #ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS
718 * enable rx input tx output port
720 pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = "
721 "%d, port_num = %d)\n", local, destid, hopcount, port_num);
723 ext_ftr_ptr = rio_mport_get_physefb(port, local, destid, hopcount);
726 rio_local_read_config_32(port, ext_ftr_ptr +
727 RIO_PORT_N_CTL_CSR(0),
730 if (rio_mport_read_config_32(port, destid, hopcount,
731 ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), ®val) < 0)
735 if (regval & RIO_PORT_N_CTL_P_TYP_SER) {
737 regval = regval | RIO_PORT_N_CTL_EN_RX_SER
738 | RIO_PORT_N_CTL_EN_TX_SER;
741 regval = regval | RIO_PORT_N_CTL_EN_RX_PAR
742 | RIO_PORT_N_CTL_EN_TX_PAR;
746 rio_local_write_config_32(port, ext_ftr_ptr +
747 RIO_PORT_N_CTL_CSR(0), regval);
749 if (rio_mport_write_config_32(port, destid, hopcount,
750 ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), regval) < 0)
756 EXPORT_SYMBOL_GPL(rio_enable_rx_tx_port);
760 * rio_chk_dev_route - Validate route to the specified device.
761 * @rdev: RIO device failed to respond
762 * @nrdev: Last active device on the route to rdev
763 * @npnum: nrdev's port number on the route to rdev
765 * Follows a route to the specified RIO device to determine the last available
766 * device (and corresponding RIO port) on the route.
769 rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum)
772 int p_port, rc = -EIO;
773 struct rio_dev *prev = NULL;
775 /* Find switch with failed RIO link */
776 while (rdev->prev && (rdev->prev->pef & RIO_PEF_SWITCH)) {
777 if (!rio_read_config_32(rdev->prev, RIO_DEV_ID_CAR, &result)) {
787 p_port = prev->rswitch->route_table[rdev->destid];
789 if (p_port != RIO_INVALID_ROUTE) {
790 pr_debug("RIO: link failed on [%s]-P%d\n",
791 rio_name(prev), p_port);
796 pr_debug("RIO: failed to trace route to %s\n", rio_name(rdev));
802 * rio_mport_chk_dev_access - Validate access to the specified device.
803 * @mport: Master port to send transactions
804 * @destid: Device destination ID in network
805 * @hopcount: Number of hops into the network
808 rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount)
813 while (rio_mport_read_config_32(mport, destid, hopcount,
814 RIO_DEV_ID_CAR, &tmp)) {
816 if (i == RIO_MAX_CHK_RETRY)
823 EXPORT_SYMBOL_GPL(rio_mport_chk_dev_access);
826 * rio_chk_dev_access - Validate access to the specified device.
827 * @rdev: Pointer to RIO device control structure
829 static int rio_chk_dev_access(struct rio_dev *rdev)
831 return rio_mport_chk_dev_access(rdev->net->hport,
832 rdev->destid, rdev->hopcount);
836 * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and
837 * returns link-response (if requested).
838 * @rdev: RIO devive to issue Input-status command
839 * @pnum: Device port number to issue the command
840 * @lnkresp: Response from a link partner
843 rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp)
849 /* Read from link maintenance response register
850 * to clear valid bit */
851 rio_read_config_32(rdev,
852 rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum),
857 /* Issue Input-status command */
858 rio_write_config_32(rdev,
859 rdev->phys_efptr + RIO_PORT_N_MNT_REQ_CSR(pnum),
862 /* Exit if the response is not expected */
867 while (checkcount--) {
869 rio_read_config_32(rdev,
870 rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum),
872 if (regval & RIO_PORT_N_MNT_RSP_RVAL) {
882 * rio_clr_err_stopped - Clears port Error-stopped states.
883 * @rdev: Pointer to RIO device control structure
884 * @pnum: Switch port number to clear errors
885 * @err_status: port error status (if 0 reads register from device)
887 static int rio_clr_err_stopped(struct rio_dev *rdev, u32 pnum, u32 err_status)
889 struct rio_dev *nextdev = rdev->rswitch->nextdev[pnum];
891 u32 far_ackid, far_linkstat, near_ackid;
894 rio_read_config_32(rdev,
895 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum),
898 if (err_status & RIO_PORT_N_ERR_STS_PW_OUT_ES) {
899 pr_debug("RIO_EM: servicing Output Error-Stopped state\n");
901 * Send a Link-Request/Input-Status control symbol
903 if (rio_get_input_status(rdev, pnum, ®val)) {
904 pr_debug("RIO_EM: Input-status response timeout\n");
908 pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n",
910 far_ackid = (regval & RIO_PORT_N_MNT_RSP_ASTAT) >> 5;
911 far_linkstat = regval & RIO_PORT_N_MNT_RSP_LSTAT;
912 rio_read_config_32(rdev,
913 rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum),
915 pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum, regval);
916 near_ackid = (regval & RIO_PORT_N_ACK_INBOUND) >> 24;
917 pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \
918 " near_ackID=0x%02x\n",
919 pnum, far_ackid, far_linkstat, near_ackid);
922 * If required, synchronize ackIDs of near and
925 if ((far_ackid != ((regval & RIO_PORT_N_ACK_OUTSTAND) >> 8)) ||
926 (far_ackid != (regval & RIO_PORT_N_ACK_OUTBOUND))) {
927 /* Align near outstanding/outbound ackIDs with
930 rio_write_config_32(rdev,
931 rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum),
933 (far_ackid << 8) | far_ackid);
934 /* Align far outstanding/outbound ackIDs with
939 rio_write_config_32(nextdev,
940 nextdev->phys_efptr +
941 RIO_PORT_N_ACK_STS_CSR(RIO_GET_PORT_NUM(nextdev->swpinfo)),
943 (near_ackid << 8) | near_ackid);
945 pr_debug("RIO_EM: Invalid nextdev pointer (NULL)\n");
948 rio_read_config_32(rdev,
949 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum),
951 pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status);
954 if ((err_status & RIO_PORT_N_ERR_STS_PW_INP_ES) && nextdev) {
955 pr_debug("RIO_EM: servicing Input Error-Stopped state\n");
956 rio_get_input_status(nextdev,
957 RIO_GET_PORT_NUM(nextdev->swpinfo), NULL);
960 rio_read_config_32(rdev,
961 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum),
963 pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status);
966 return (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES |
967 RIO_PORT_N_ERR_STS_PW_INP_ES)) ? 1 : 0;
971 * rio_inb_pwrite_handler - process inbound port-write message
972 * @pw_msg: pointer to inbound port-write message
974 * Processes an inbound port-write message. Returns 0 if the request
975 * has been satisfied.
977 int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg)
979 struct rio_dev *rdev;
980 u32 err_status, em_perrdet, em_ltlerrdet;
983 rdev = rio_get_comptag((pw_msg->em.comptag & RIO_CTAG_UDEVID), NULL);
985 /* Device removed or enumeration error */
986 pr_debug("RIO: %s No matching device for CTag 0x%08x\n",
987 __func__, pw_msg->em.comptag);
991 pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev));
996 for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32);) {
997 pr_debug("0x%02x: %08x %08x %08x %08x\n",
998 i*4, pw_msg->raw[i], pw_msg->raw[i + 1],
999 pw_msg->raw[i + 2], pw_msg->raw[i + 3]);
1005 /* Call an external service function (if such is registered
1006 * for this device). This may be the service for endpoints that send
1007 * device-specific port-write messages. End-point messages expected
1008 * to be handled completely by EP specific device driver.
1009 * For switches rc==0 signals that no standard processing required.
1011 if (rdev->pwcback != NULL) {
1012 rc = rdev->pwcback(rdev, pw_msg, 0);
1017 portnum = pw_msg->em.is_port & 0xFF;
1019 /* Check if device and route to it are functional:
1020 * Sometimes devices may send PW message(s) just before being
1021 * powered down (or link being lost).
1023 if (rio_chk_dev_access(rdev)) {
1024 pr_debug("RIO: device access failed - get link partner\n");
1025 /* Scan route to the device and identify failed link.
1026 * This will replace device and port reported in PW message.
1027 * PW message should not be used after this point.
1029 if (rio_chk_dev_route(rdev, &rdev, &portnum)) {
1030 pr_err("RIO: Route trace for %s failed\n",
1037 /* For End-point devices processing stops here */
1038 if (!(rdev->pef & RIO_PEF_SWITCH))
1041 if (rdev->phys_efptr == 0) {
1042 pr_err("RIO_PW: Bad switch initialization for %s\n",
1048 * Process the port-write notification from switch
1050 if (rdev->rswitch->ops && rdev->rswitch->ops->em_handle)
1051 rdev->rswitch->ops->em_handle(rdev, portnum);
1053 rio_read_config_32(rdev,
1054 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
1056 pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status);
1058 if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) {
1060 if (!(rdev->rswitch->port_ok & (1 << portnum))) {
1061 rdev->rswitch->port_ok |= (1 << portnum);
1062 rio_set_port_lockout(rdev, portnum, 0);
1063 /* Schedule Insertion Service */
1064 pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n",
1065 rio_name(rdev), portnum);
1068 /* Clear error-stopped states (if reported).
1069 * Depending on the link partner state, two attempts
1070 * may be needed for successful recovery.
1072 if (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES |
1073 RIO_PORT_N_ERR_STS_PW_INP_ES)) {
1074 if (rio_clr_err_stopped(rdev, portnum, err_status))
1075 rio_clr_err_stopped(rdev, portnum, 0);
1077 } else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */
1079 if (rdev->rswitch->port_ok & (1 << portnum)) {
1080 rdev->rswitch->port_ok &= ~(1 << portnum);
1081 rio_set_port_lockout(rdev, portnum, 1);
1083 rio_write_config_32(rdev,
1085 RIO_PORT_N_ACK_STS_CSR(portnum),
1086 RIO_PORT_N_ACK_CLEAR);
1088 /* Schedule Extraction Service */
1089 pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n",
1090 rio_name(rdev), portnum);
1094 rio_read_config_32(rdev,
1095 rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet);
1097 pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n",
1098 portnum, em_perrdet);
1099 /* Clear EM Port N Error Detect CSR */
1100 rio_write_config_32(rdev,
1101 rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0);
1104 rio_read_config_32(rdev,
1105 rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet);
1107 pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n",
1109 /* Clear EM L/T Layer Error Detect CSR */
1110 rio_write_config_32(rdev,
1111 rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0);
1114 /* Clear remaining error bits and Port-Write Pending bit */
1115 rio_write_config_32(rdev,
1116 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
1121 EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler);
1124 * rio_mport_get_efb - get pointer to next extended features block
1125 * @port: Master port to issue transaction
1126 * @local: Indicate a local master port or remote device access
1127 * @destid: Destination ID of the device
1128 * @hopcount: Number of switch hops to the device
1129 * @from: Offset of current Extended Feature block header (if 0 starts
1130 * from ExtFeaturePtr)
1133 rio_mport_get_efb(struct rio_mport *port, int local, u16 destid,
1134 u8 hopcount, u32 from)
1140 rio_local_read_config_32(port, RIO_ASM_INFO_CAR,
1143 rio_mport_read_config_32(port, destid, hopcount,
1144 RIO_ASM_INFO_CAR, ®_val);
1145 return reg_val & RIO_EXT_FTR_PTR_MASK;
1148 rio_local_read_config_32(port, from, ®_val);
1150 rio_mport_read_config_32(port, destid, hopcount,
1152 return RIO_GET_BLOCK_ID(reg_val);
1155 EXPORT_SYMBOL_GPL(rio_mport_get_efb);
1158 * rio_mport_get_feature - query for devices' extended features
1159 * @port: Master port to issue transaction
1160 * @local: Indicate a local master port or remote device access
1161 * @destid: Destination ID of the device
1162 * @hopcount: Number of switch hops to the device
1163 * @ftr: Extended feature code
1165 * Tell if a device supports a given RapidIO capability.
1166 * Returns the offset of the requested extended feature
1167 * block within the device's RIO configuration space or
1168 * 0 in case the device does not support it. Possible
1171 * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices
1173 * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices
1175 * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices
1177 * %RIO_EFB_SER_EP_ID LP/Serial EP Devices
1179 * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices
1181 * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices
1184 rio_mport_get_feature(struct rio_mport * port, int local, u16 destid,
1185 u8 hopcount, int ftr)
1187 u32 asm_info, ext_ftr_ptr, ftr_header;
1190 rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info);
1192 rio_mport_read_config_32(port, destid, hopcount,
1193 RIO_ASM_INFO_CAR, &asm_info);
1195 ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK;
1197 while (ext_ftr_ptr) {
1199 rio_local_read_config_32(port, ext_ftr_ptr,
1202 rio_mport_read_config_32(port, destid, hopcount,
1203 ext_ftr_ptr, &ftr_header);
1204 if (RIO_GET_BLOCK_ID(ftr_header) == ftr)
1206 if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header)))
1212 EXPORT_SYMBOL_GPL(rio_mport_get_feature);
1215 * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did
1216 * @vid: RIO vid to match or %RIO_ANY_ID to match all vids
1217 * @did: RIO did to match or %RIO_ANY_ID to match all dids
1218 * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids
1219 * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids
1220 * @from: Previous RIO device found in search, or %NULL for new search
1222 * Iterates through the list of known RIO devices. If a RIO device is
1223 * found with a matching @vid, @did, @asm_vid, @asm_did, the reference
1224 * count to the device is incrememted and a pointer to its device
1225 * structure is returned. Otherwise, %NULL is returned. A new search
1226 * is initiated by passing %NULL to the @from argument. Otherwise, if
1227 * @from is not %NULL, searches continue from next device on the global
1228 * list. The reference count for @from is always decremented if it is
1231 struct rio_dev *rio_get_asm(u16 vid, u16 did,
1232 u16 asm_vid, u16 asm_did, struct rio_dev *from)
1234 struct list_head *n;
1235 struct rio_dev *rdev;
1237 WARN_ON(in_interrupt());
1238 spin_lock(&rio_global_list_lock);
1239 n = from ? from->global_list.next : rio_devices.next;
1241 while (n && (n != &rio_devices)) {
1242 rdev = rio_dev_g(n);
1243 if ((vid == RIO_ANY_ID || rdev->vid == vid) &&
1244 (did == RIO_ANY_ID || rdev->did == did) &&
1245 (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) &&
1246 (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did))
1253 rdev = rio_dev_get(rdev);
1254 spin_unlock(&rio_global_list_lock);
1259 * rio_get_device - Begin or continue searching for a RIO device by vid/did
1260 * @vid: RIO vid to match or %RIO_ANY_ID to match all vids
1261 * @did: RIO did to match or %RIO_ANY_ID to match all dids
1262 * @from: Previous RIO device found in search, or %NULL for new search
1264 * Iterates through the list of known RIO devices. If a RIO device is
1265 * found with a matching @vid and @did, the reference count to the
1266 * device is incrememted and a pointer to its device structure is returned.
1267 * Otherwise, %NULL is returned. A new search is initiated by passing %NULL
1268 * to the @from argument. Otherwise, if @from is not %NULL, searches
1269 * continue from next device on the global list. The reference count for
1270 * @from is always decremented if it is not %NULL.
1272 struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from)
1274 return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from);
1278 * rio_std_route_add_entry - Add switch route table entry using standard
1279 * registers defined in RIO specification rev.1.3
1280 * @mport: Master port to issue transaction
1281 * @destid: Destination ID of the device
1282 * @hopcount: Number of switch hops to the device
1283 * @table: routing table ID (global or port-specific)
1284 * @route_destid: destID entry in the RT
1285 * @route_port: destination port for specified destID
1288 rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
1289 u16 table, u16 route_destid, u8 route_port)
1291 if (table == RIO_GLOBAL_TABLE) {
1292 rio_mport_write_config_32(mport, destid, hopcount,
1293 RIO_STD_RTE_CONF_DESTID_SEL_CSR,
1295 rio_mport_write_config_32(mport, destid, hopcount,
1296 RIO_STD_RTE_CONF_PORT_SEL_CSR,
1305 * rio_std_route_get_entry - Read switch route table entry (port number)
1306 * associated with specified destID using standard registers defined in RIO
1307 * specification rev.1.3
1308 * @mport: Master port to issue transaction
1309 * @destid: Destination ID of the device
1310 * @hopcount: Number of switch hops to the device
1311 * @table: routing table ID (global or port-specific)
1312 * @route_destid: destID entry in the RT
1313 * @route_port: returned destination port for specified destID
1316 rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
1317 u16 table, u16 route_destid, u8 *route_port)
1321 if (table == RIO_GLOBAL_TABLE) {
1322 rio_mport_write_config_32(mport, destid, hopcount,
1323 RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid);
1324 rio_mport_read_config_32(mport, destid, hopcount,
1325 RIO_STD_RTE_CONF_PORT_SEL_CSR, &result);
1327 *route_port = (u8)result;
1334 * rio_std_route_clr_table - Clear swotch route table using standard registers
1335 * defined in RIO specification rev.1.3.
1336 * @mport: Master port to issue transaction
1337 * @destid: Destination ID of the device
1338 * @hopcount: Number of switch hops to the device
1339 * @table: routing table ID (global or port-specific)
1342 rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
1345 u32 max_destid = 0xff;
1346 u32 i, pef, id_inc = 1, ext_cfg = 0;
1347 u32 port_sel = RIO_INVALID_ROUTE;
1349 if (table == RIO_GLOBAL_TABLE) {
1350 rio_mport_read_config_32(mport, destid, hopcount,
1353 if (mport->sys_size) {
1354 rio_mport_read_config_32(mport, destid, hopcount,
1355 RIO_SWITCH_RT_LIMIT,
1357 max_destid &= RIO_RT_MAX_DESTID;
1360 if (pef & RIO_PEF_EXT_RT) {
1361 ext_cfg = 0x80000000;
1363 port_sel = (RIO_INVALID_ROUTE << 24) |
1364 (RIO_INVALID_ROUTE << 16) |
1365 (RIO_INVALID_ROUTE << 8) |
1369 for (i = 0; i <= max_destid;) {
1370 rio_mport_write_config_32(mport, destid, hopcount,
1371 RIO_STD_RTE_CONF_DESTID_SEL_CSR,
1373 rio_mport_write_config_32(mport, destid, hopcount,
1374 RIO_STD_RTE_CONF_PORT_SEL_CSR,
1385 * rio_lock_device - Acquires host device lock for specified device
1386 * @port: Master port to send transaction
1387 * @destid: Destination ID for device/switch
1388 * @hopcount: Hopcount to reach switch
1389 * @wait_ms: Max wait time in msec (0 = no timeout)
1391 * Attepts to acquire host device lock for specified device
1392 * Returns 0 if device lock acquired or EINVAL if timeout expires.
1394 int rio_lock_device(struct rio_mport *port, u16 destid,
1395 u8 hopcount, int wait_ms)
1400 /* Attempt to acquire device lock */
1401 rio_mport_write_config_32(port, destid, hopcount,
1402 RIO_HOST_DID_LOCK_CSR, port->host_deviceid);
1403 rio_mport_read_config_32(port, destid, hopcount,
1404 RIO_HOST_DID_LOCK_CSR, &result);
1406 while (result != port->host_deviceid) {
1407 if (wait_ms != 0 && tcnt == wait_ms) {
1408 pr_debug("RIO: timeout when locking device %x:%x\n",
1416 /* Try to acquire device lock again */
1417 rio_mport_write_config_32(port, destid,
1419 RIO_HOST_DID_LOCK_CSR,
1420 port->host_deviceid);
1421 rio_mport_read_config_32(port, destid,
1423 RIO_HOST_DID_LOCK_CSR, &result);
1428 EXPORT_SYMBOL_GPL(rio_lock_device);
1431 * rio_unlock_device - Releases host device lock for specified device
1432 * @port: Master port to send transaction
1433 * @destid: Destination ID for device/switch
1434 * @hopcount: Hopcount to reach switch
1436 * Returns 0 if device lock released or EINVAL if fails.
1438 int rio_unlock_device(struct rio_mport *port, u16 destid, u8 hopcount)
1442 /* Release device lock */
1443 rio_mport_write_config_32(port, destid,
1445 RIO_HOST_DID_LOCK_CSR,
1446 port->host_deviceid);
1447 rio_mport_read_config_32(port, destid, hopcount,
1448 RIO_HOST_DID_LOCK_CSR, &result);
1449 if ((result & 0xffff) != 0xffff) {
1450 pr_debug("RIO: badness when releasing device lock %x:%x\n",
1457 EXPORT_SYMBOL_GPL(rio_unlock_device);
1460 * rio_route_add_entry- Add a route entry to a switch routing table
1462 * @table: Routing table ID
1463 * @route_destid: Destination ID to be routed
1464 * @route_port: Port number to be routed
1465 * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock)
1467 * If available calls the switch specific add_entry() method to add a route
1468 * entry into a switch routing table. Otherwise uses standard RT update method
1469 * as defined by RapidIO specification. A specific routing table can be selected
1470 * using the @table argument if a switch has per port routing tables or
1471 * the standard (or global) table may be used by passing
1472 * %RIO_GLOBAL_TABLE in @table.
1474 * Returns %0 on success or %-EINVAL on failure.
1476 int rio_route_add_entry(struct rio_dev *rdev,
1477 u16 table, u16 route_destid, u8 route_port, int lock)
1480 struct rio_switch_ops *ops = rdev->rswitch->ops;
1483 rc = rio_lock_device(rdev->net->hport, rdev->destid,
1484 rdev->hopcount, 1000);
1489 spin_lock(&rdev->rswitch->lock);
1491 if (ops == NULL || ops->add_entry == NULL) {
1492 rc = rio_std_route_add_entry(rdev->net->hport, rdev->destid,
1493 rdev->hopcount, table,
1494 route_destid, route_port);
1495 } else if (try_module_get(ops->owner)) {
1496 rc = ops->add_entry(rdev->net->hport, rdev->destid,
1497 rdev->hopcount, table, route_destid,
1499 module_put(ops->owner);
1502 spin_unlock(&rdev->rswitch->lock);
1505 rio_unlock_device(rdev->net->hport, rdev->destid,
1510 EXPORT_SYMBOL_GPL(rio_route_add_entry);
1513 * rio_route_get_entry- Read an entry from a switch routing table
1515 * @table: Routing table ID
1516 * @route_destid: Destination ID to be routed
1517 * @route_port: Pointer to read port number into
1518 * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock)
1520 * If available calls the switch specific get_entry() method to fetch a route
1521 * entry from a switch routing table. Otherwise uses standard RT read method
1522 * as defined by RapidIO specification. A specific routing table can be selected
1523 * using the @table argument if a switch has per port routing tables or
1524 * the standard (or global) table may be used by passing
1525 * %RIO_GLOBAL_TABLE in @table.
1527 * Returns %0 on success or %-EINVAL on failure.
1529 int rio_route_get_entry(struct rio_dev *rdev, u16 table,
1530 u16 route_destid, u8 *route_port, int lock)
1533 struct rio_switch_ops *ops = rdev->rswitch->ops;
1536 rc = rio_lock_device(rdev->net->hport, rdev->destid,
1537 rdev->hopcount, 1000);
1542 spin_lock(&rdev->rswitch->lock);
1544 if (ops == NULL || ops->get_entry == NULL) {
1545 rc = rio_std_route_get_entry(rdev->net->hport, rdev->destid,
1546 rdev->hopcount, table,
1547 route_destid, route_port);
1548 } else if (try_module_get(ops->owner)) {
1549 rc = ops->get_entry(rdev->net->hport, rdev->destid,
1550 rdev->hopcount, table, route_destid,
1552 module_put(ops->owner);
1555 spin_unlock(&rdev->rswitch->lock);
1558 rio_unlock_device(rdev->net->hport, rdev->destid,
1562 EXPORT_SYMBOL_GPL(rio_route_get_entry);
1565 * rio_route_clr_table - Clear a switch routing table
1567 * @table: Routing table ID
1568 * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock)
1570 * If available calls the switch specific clr_table() method to clear a switch
1571 * routing table. Otherwise uses standard RT write method as defined by RapidIO
1572 * specification. A specific routing table can be selected using the @table
1573 * argument if a switch has per port routing tables or the standard (or global)
1574 * table may be used by passing %RIO_GLOBAL_TABLE in @table.
1576 * Returns %0 on success or %-EINVAL on failure.
1578 int rio_route_clr_table(struct rio_dev *rdev, u16 table, int lock)
1581 struct rio_switch_ops *ops = rdev->rswitch->ops;
1584 rc = rio_lock_device(rdev->net->hport, rdev->destid,
1585 rdev->hopcount, 1000);
1590 spin_lock(&rdev->rswitch->lock);
1592 if (ops == NULL || ops->clr_table == NULL) {
1593 rc = rio_std_route_clr_table(rdev->net->hport, rdev->destid,
1594 rdev->hopcount, table);
1595 } else if (try_module_get(ops->owner)) {
1596 rc = ops->clr_table(rdev->net->hport, rdev->destid,
1597 rdev->hopcount, table);
1599 module_put(ops->owner);
1602 spin_unlock(&rdev->rswitch->lock);
1605 rio_unlock_device(rdev->net->hport, rdev->destid,
1610 EXPORT_SYMBOL_GPL(rio_route_clr_table);
1612 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
1614 static bool rio_chan_filter(struct dma_chan *chan, void *arg)
1616 struct rio_mport *mport = arg;
1618 /* Check that DMA device belongs to the right MPORT */
1619 return mport == container_of(chan->device, struct rio_mport, dma);
1623 * rio_request_mport_dma - request RapidIO capable DMA channel associated
1624 * with specified local RapidIO mport device.
1625 * @mport: RIO mport to perform DMA data transfers
1627 * Returns pointer to allocated DMA channel or NULL if failed.
1629 struct dma_chan *rio_request_mport_dma(struct rio_mport *mport)
1631 dma_cap_mask_t mask;
1634 dma_cap_set(DMA_SLAVE, mask);
1635 return dma_request_channel(mask, rio_chan_filter, mport);
1637 EXPORT_SYMBOL_GPL(rio_request_mport_dma);
1640 * rio_request_dma - request RapidIO capable DMA channel that supports
1641 * specified target RapidIO device.
1642 * @rdev: RIO device associated with DMA transfer
1644 * Returns pointer to allocated DMA channel or NULL if failed.
1646 struct dma_chan *rio_request_dma(struct rio_dev *rdev)
1648 return rio_request_mport_dma(rdev->net->hport);
1650 EXPORT_SYMBOL_GPL(rio_request_dma);
1653 * rio_release_dma - release specified DMA channel
1654 * @dchan: DMA channel to release
1656 void rio_release_dma(struct dma_chan *dchan)
1658 dma_release_channel(dchan);
1660 EXPORT_SYMBOL_GPL(rio_release_dma);
1663 * rio_dma_prep_xfer - RapidIO specific wrapper
1664 * for device_prep_slave_sg callback defined by DMAENGINE.
1665 * @dchan: DMA channel to configure
1666 * @destid: target RapidIO device destination ID
1667 * @data: RIO specific data descriptor
1668 * @direction: DMA data transfer direction (TO or FROM the device)
1669 * @flags: dmaengine defined flags
1671 * Initializes RapidIO capable DMA channel for the specified data transfer.
1672 * Uses DMA channel private extension to pass information related to remote
1673 * target RIO device.
1674 * Returns pointer to DMA transaction descriptor or NULL if failed.
1676 struct dma_async_tx_descriptor *rio_dma_prep_xfer(struct dma_chan *dchan,
1677 u16 destid, struct rio_dma_data *data,
1678 enum dma_transfer_direction direction, unsigned long flags)
1680 struct rio_dma_ext rio_ext;
1682 if (dchan->device->device_prep_slave_sg == NULL) {
1683 pr_err("%s: prep_rio_sg == NULL\n", __func__);
1687 rio_ext.destid = destid;
1688 rio_ext.rio_addr_u = data->rio_addr_u;
1689 rio_ext.rio_addr = data->rio_addr;
1690 rio_ext.wr_type = data->wr_type;
1692 return dmaengine_prep_rio_sg(dchan, data->sg, data->sg_len,
1693 direction, flags, &rio_ext);
1695 EXPORT_SYMBOL_GPL(rio_dma_prep_xfer);
1698 * rio_dma_prep_slave_sg - RapidIO specific wrapper
1699 * for device_prep_slave_sg callback defined by DMAENGINE.
1700 * @rdev: RIO device control structure
1701 * @dchan: DMA channel to configure
1702 * @data: RIO specific data descriptor
1703 * @direction: DMA data transfer direction (TO or FROM the device)
1704 * @flags: dmaengine defined flags
1706 * Initializes RapidIO capable DMA channel for the specified data transfer.
1707 * Uses DMA channel private extension to pass information related to remote
1708 * target RIO device.
1709 * Returns pointer to DMA transaction descriptor or NULL if failed.
1711 struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(struct rio_dev *rdev,
1712 struct dma_chan *dchan, struct rio_dma_data *data,
1713 enum dma_transfer_direction direction, unsigned long flags)
1715 return rio_dma_prep_xfer(dchan, rdev->destid, data, direction, flags);
1717 EXPORT_SYMBOL_GPL(rio_dma_prep_slave_sg);
1719 #endif /* CONFIG_RAPIDIO_DMA_ENGINE */
1722 * rio_find_mport - find RIO mport by its ID
1723 * @mport_id: number (ID) of mport device
1725 * Given a RIO mport number, the desired mport is located
1726 * in the global list of mports. If the mport is found, a pointer to its
1727 * data structure is returned. If no mport is found, %NULL is returned.
1729 struct rio_mport *rio_find_mport(int mport_id)
1731 struct rio_mport *port;
1733 mutex_lock(&rio_mport_list_lock);
1734 list_for_each_entry(port, &rio_mports, node) {
1735 if (port->id == mport_id)
1740 mutex_unlock(&rio_mport_list_lock);
1746 * rio_register_scan - enumeration/discovery method registration interface
1747 * @mport_id: mport device ID for which fabric scan routine has to be set
1748 * (RIO_MPORT_ANY = set for all available mports)
1749 * @scan_ops: enumeration/discovery operations structure
1751 * Registers enumeration/discovery operations with RapidIO subsystem and
1752 * attaches it to the specified mport device (or all available mports
1753 * if RIO_MPORT_ANY is specified).
1755 * Returns error if the mport already has an enumerator attached to it.
1756 * In case of RIO_MPORT_ANY skips mports with valid scan routines (no error).
1758 int rio_register_scan(int mport_id, struct rio_scan *scan_ops)
1760 struct rio_mport *port;
1761 struct rio_scan_node *scan;
1764 pr_debug("RIO: %s for mport_id=%d\n", __func__, mport_id);
1766 if ((mport_id != RIO_MPORT_ANY && mport_id >= RIO_MAX_MPORTS) ||
1770 mutex_lock(&rio_mport_list_lock);
1773 * Check if there is another enumerator already registered for
1774 * the same mport ID (including RIO_MPORT_ANY). Multiple enumerators
1775 * for the same mport ID are not supported.
1777 list_for_each_entry(scan, &rio_scans, node) {
1778 if (scan->mport_id == mport_id) {
1785 * Allocate and initialize new scan registration node.
1787 scan = kzalloc(sizeof(*scan), GFP_KERNEL);
1793 scan->mport_id = mport_id;
1794 scan->ops = scan_ops;
1797 * Traverse the list of registered mports to attach this new scan.
1799 * The new scan with matching mport ID overrides any previously attached
1800 * scan assuming that old scan (if any) is the default one (based on the
1801 * enumerator registration check above).
1802 * If the new scan is the global one, it will be attached only to mports
1803 * that do not have their own individual operations already attached.
1805 list_for_each_entry(port, &rio_mports, node) {
1806 if (port->id == mport_id) {
1807 port->nscan = scan_ops;
1809 } else if (mport_id == RIO_MPORT_ANY && !port->nscan)
1810 port->nscan = scan_ops;
1813 list_add_tail(&scan->node, &rio_scans);
1816 mutex_unlock(&rio_mport_list_lock);
1820 EXPORT_SYMBOL_GPL(rio_register_scan);
1823 * rio_unregister_scan - removes enumeration/discovery method from mport
1824 * @mport_id: mport device ID for which fabric scan routine has to be
1825 * unregistered (RIO_MPORT_ANY = apply to all mports that use
1826 * the specified scan_ops)
1827 * @scan_ops: enumeration/discovery operations structure
1829 * Removes enumeration or discovery method assigned to the specified mport
1830 * device. If RIO_MPORT_ANY is specified, removes the specified operations from
1831 * all mports that have them attached.
1833 int rio_unregister_scan(int mport_id, struct rio_scan *scan_ops)
1835 struct rio_mport *port;
1836 struct rio_scan_node *scan;
1838 pr_debug("RIO: %s for mport_id=%d\n", __func__, mport_id);
1840 if (mport_id != RIO_MPORT_ANY && mport_id >= RIO_MAX_MPORTS)
1843 mutex_lock(&rio_mport_list_lock);
1845 list_for_each_entry(port, &rio_mports, node)
1846 if (port->id == mport_id ||
1847 (mport_id == RIO_MPORT_ANY && port->nscan == scan_ops))
1850 list_for_each_entry(scan, &rio_scans, node) {
1851 if (scan->mport_id == mport_id) {
1852 list_del(&scan->node);
1858 mutex_unlock(&rio_mport_list_lock);
1862 EXPORT_SYMBOL_GPL(rio_unregister_scan);
1865 * rio_mport_scan - execute enumeration/discovery on the specified mport
1866 * @mport_id: number (ID) of mport device
1868 int rio_mport_scan(int mport_id)
1870 struct rio_mport *port = NULL;
1873 mutex_lock(&rio_mport_list_lock);
1874 list_for_each_entry(port, &rio_mports, node) {
1875 if (port->id == mport_id)
1878 mutex_unlock(&rio_mport_list_lock);
1882 mutex_unlock(&rio_mport_list_lock);
1886 if (!try_module_get(port->nscan->owner)) {
1887 mutex_unlock(&rio_mport_list_lock);
1891 mutex_unlock(&rio_mport_list_lock);
1893 if (port->host_deviceid >= 0)
1894 rc = port->nscan->enumerate(port, 0);
1896 rc = port->nscan->discover(port, RIO_SCAN_ENUM_NO_WAIT);
1898 module_put(port->nscan->owner);
1902 static void rio_fixup_device(struct rio_dev *dev)
1906 static int rio_init(void)
1908 struct rio_dev *dev = NULL;
1910 while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) {
1911 rio_fixup_device(dev);
1916 static struct workqueue_struct *rio_wq;
1918 struct rio_disc_work {
1919 struct work_struct work;
1920 struct rio_mport *mport;
1923 static void disc_work_handler(struct work_struct *_work)
1925 struct rio_disc_work *work;
1927 work = container_of(_work, struct rio_disc_work, work);
1928 pr_debug("RIO: discovery work for mport %d %s\n",
1929 work->mport->id, work->mport->name);
1930 if (try_module_get(work->mport->nscan->owner)) {
1931 work->mport->nscan->discover(work->mport, 0);
1932 module_put(work->mport->nscan->owner);
1936 int rio_init_mports(void)
1938 struct rio_mport *port;
1939 struct rio_disc_work *work;
1946 * First, run enumerations and check if we need to perform discovery
1947 * on any of the registered mports.
1949 mutex_lock(&rio_mport_list_lock);
1950 list_for_each_entry(port, &rio_mports, node) {
1951 if (port->host_deviceid >= 0) {
1952 if (port->nscan && try_module_get(port->nscan->owner)) {
1953 port->nscan->enumerate(port, 0);
1954 module_put(port->nscan->owner);
1959 mutex_unlock(&rio_mport_list_lock);
1965 * If we have mports that require discovery schedule a discovery work
1966 * for each of them. If the code below fails to allocate needed
1967 * resources, exit without error to keep results of enumeration
1969 * TODO: Implement restart of discovery process for all or
1970 * individual discovering mports.
1972 rio_wq = alloc_workqueue("riodisc", 0, 0);
1974 pr_err("RIO: unable allocate rio_wq\n");
1978 work = kcalloc(n, sizeof *work, GFP_KERNEL);
1980 pr_err("RIO: no memory for work struct\n");
1981 destroy_workqueue(rio_wq);
1986 mutex_lock(&rio_mport_list_lock);
1987 list_for_each_entry(port, &rio_mports, node) {
1988 if (port->host_deviceid < 0 && port->nscan) {
1989 work[n].mport = port;
1990 INIT_WORK(&work[n].work, disc_work_handler);
1991 queue_work(rio_wq, &work[n].work);
1996 flush_workqueue(rio_wq);
1997 mutex_unlock(&rio_mport_list_lock);
1998 pr_debug("RIO: destroy discovery workqueue\n");
1999 destroy_workqueue(rio_wq);
2008 static int rio_get_hdid(int index)
2010 if (ids_num == 0 || ids_num <= index || index >= RIO_MAX_MPORTS)
2016 int rio_mport_initialize(struct rio_mport *mport)
2018 if (next_portid >= RIO_MAX_MPORTS) {
2019 pr_err("RIO: reached specified max number of mports\n");
2023 atomic_set(&mport->state, RIO_DEVICE_INITIALIZING);
2024 mport->id = next_portid++;
2025 mport->host_deviceid = rio_get_hdid(mport->id);
2026 mport->nscan = NULL;
2030 EXPORT_SYMBOL_GPL(rio_mport_initialize);
2032 int rio_register_mport(struct rio_mport *port)
2034 struct rio_scan_node *scan = NULL;
2037 mutex_lock(&rio_mport_list_lock);
2040 * Check if there are any registered enumeration/discovery operations
2041 * that have to be attached to the added mport.
2043 list_for_each_entry(scan, &rio_scans, node) {
2044 if (port->id == scan->mport_id ||
2045 scan->mport_id == RIO_MPORT_ANY) {
2046 port->nscan = scan->ops;
2047 if (port->id == scan->mport_id)
2052 list_add_tail(&port->node, &rio_mports);
2053 mutex_unlock(&rio_mport_list_lock);
2055 dev_set_name(&port->dev, "rapidio%d", port->id);
2056 port->dev.class = &rio_mport_class;
2057 atomic_set(&port->state, RIO_DEVICE_RUNNING);
2059 res = device_register(&port->dev);
2061 dev_err(&port->dev, "RIO: mport%d registration failed ERR=%d\n",
2064 dev_dbg(&port->dev, "RIO: registered mport%d\n", port->id);
2068 EXPORT_SYMBOL_GPL(rio_register_mport);
2070 static int rio_mport_cleanup_callback(struct device *dev, void *data)
2072 struct rio_dev *rdev = to_rio_dev(dev);
2074 if (dev->bus == &rio_bus_type)
2075 rio_del_device(rdev, RIO_DEVICE_SHUTDOWN);
2079 static int rio_net_remove_children(struct rio_net *net)
2082 * Unregister all RapidIO devices residing on this net (this will
2083 * invoke notification of registered subsystem interfaces as well).
2085 device_for_each_child(&net->dev, NULL, rio_mport_cleanup_callback);
2089 int rio_unregister_mport(struct rio_mport *port)
2091 pr_debug("RIO: %s %s id=%d\n", __func__, port->name, port->id);
2093 /* Transition mport to the SHUTDOWN state */
2094 if (atomic_cmpxchg(&port->state,
2096 RIO_DEVICE_SHUTDOWN) != RIO_DEVICE_RUNNING) {
2097 pr_err("RIO: %s unexpected state transition for mport %s\n",
2098 __func__, port->name);
2101 if (port->net && port->net->hport == port) {
2102 rio_net_remove_children(port->net);
2103 rio_free_net(port->net);
2107 * Unregister all RapidIO devices attached to this mport (this will
2108 * invoke notification of registered subsystem interfaces as well).
2110 mutex_lock(&rio_mport_list_lock);
2111 list_del(&port->node);
2112 mutex_unlock(&rio_mport_list_lock);
2113 device_unregister(&port->dev);
2117 EXPORT_SYMBOL_GPL(rio_unregister_mport);
2119 EXPORT_SYMBOL_GPL(rio_local_get_device_id);
2120 EXPORT_SYMBOL_GPL(rio_get_device);
2121 EXPORT_SYMBOL_GPL(rio_get_asm);
2122 EXPORT_SYMBOL_GPL(rio_request_inb_dbell);
2123 EXPORT_SYMBOL_GPL(rio_release_inb_dbell);
2124 EXPORT_SYMBOL_GPL(rio_request_outb_dbell);
2125 EXPORT_SYMBOL_GPL(rio_release_outb_dbell);
2126 EXPORT_SYMBOL_GPL(rio_request_inb_mbox);
2127 EXPORT_SYMBOL_GPL(rio_release_inb_mbox);
2128 EXPORT_SYMBOL_GPL(rio_request_outb_mbox);
2129 EXPORT_SYMBOL_GPL(rio_release_outb_mbox);
2130 EXPORT_SYMBOL_GPL(rio_init_mports);