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 Integrated Device Technology, Inc.
9 * Alex Bounine <alexandre.bounine@idt.com>
10 * - Added Port-Write/Error Management initialization and handling
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
18 #include <linux/types.h>
19 #include <linux/kernel.h>
21 #include <linux/delay.h>
22 #include <linux/init.h>
23 #include <linux/rio.h>
24 #include <linux/rio_drv.h>
25 #include <linux/rio_ids.h>
26 #include <linux/rio_regs.h>
27 #include <linux/module.h>
28 #include <linux/spinlock.h>
29 #include <linux/slab.h>
30 #include <linux/interrupt.h>
34 static LIST_HEAD(rio_mports);
37 * rio_local_get_device_id - Get the base/extended device id for a port
38 * @port: RIO master port from which to get the deviceid
40 * Reads the base/extended device id from the local device
41 * implementing the master port. Returns the 8/16-bit device
44 u16 rio_local_get_device_id(struct rio_mport *port)
48 rio_local_read_config_32(port, RIO_DID_CSR, &result);
50 return (RIO_GET_DID(port->sys_size, result));
54 * rio_request_inb_mbox - request inbound mailbox service
55 * @mport: RIO master port from which to allocate the mailbox resource
56 * @dev_id: Device specific pointer to pass on event
57 * @mbox: Mailbox number to claim
58 * @entries: Number of entries in inbound mailbox queue
59 * @minb: Callback to execute when inbound message is received
61 * Requests ownership of an inbound mailbox resource and binds
62 * a callback function to the resource. Returns %0 on success.
64 int rio_request_inb_mbox(struct rio_mport *mport,
68 void (*minb) (struct rio_mport * mport, void *dev_id, int mbox,
73 struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
76 rio_init_mbox_res(res, mbox, mbox);
78 /* Make sure this mailbox isn't in use */
80 request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE],
86 mport->inb_msg[mbox].res = res;
88 /* Hook the inbound message callback */
89 mport->inb_msg[mbox].mcback = minb;
91 rc = rio_open_inb_mbox(mport, dev_id, mbox, entries);
100 * rio_release_inb_mbox - release inbound mailbox message service
101 * @mport: RIO master port from which to release the mailbox resource
102 * @mbox: Mailbox number to release
104 * Releases ownership of an inbound mailbox resource. Returns 0
105 * if the request has been satisfied.
107 int rio_release_inb_mbox(struct rio_mport *mport, int mbox)
109 rio_close_inb_mbox(mport, mbox);
111 /* Release the mailbox resource */
112 return release_resource(mport->inb_msg[mbox].res);
116 * rio_request_outb_mbox - request outbound mailbox service
117 * @mport: RIO master port from which to allocate the mailbox resource
118 * @dev_id: Device specific pointer to pass on event
119 * @mbox: Mailbox number to claim
120 * @entries: Number of entries in outbound mailbox queue
121 * @moutb: Callback to execute when outbound message is sent
123 * Requests ownership of an outbound mailbox resource and binds
124 * a callback function to the resource. Returns 0 on success.
126 int rio_request_outb_mbox(struct rio_mport *mport,
130 void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot))
134 struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
137 rio_init_mbox_res(res, mbox, mbox);
139 /* Make sure this outbound mailbox isn't in use */
141 request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE],
147 mport->outb_msg[mbox].res = res;
149 /* Hook the inbound message callback */
150 mport->outb_msg[mbox].mcback = moutb;
152 rc = rio_open_outb_mbox(mport, dev_id, mbox, entries);
161 * rio_release_outb_mbox - release outbound mailbox message service
162 * @mport: RIO master port from which to release the mailbox resource
163 * @mbox: Mailbox number to release
165 * Releases ownership of an inbound mailbox resource. Returns 0
166 * if the request has been satisfied.
168 int rio_release_outb_mbox(struct rio_mport *mport, int mbox)
170 rio_close_outb_mbox(mport, mbox);
172 /* Release the mailbox resource */
173 return release_resource(mport->outb_msg[mbox].res);
177 * rio_setup_inb_dbell - bind inbound doorbell callback
178 * @mport: RIO master port to bind the doorbell callback
179 * @dev_id: Device specific pointer to pass on event
180 * @res: Doorbell message resource
181 * @dinb: Callback to execute when doorbell is received
183 * Adds a doorbell resource/callback pair into a port's
184 * doorbell event list. Returns 0 if the request has been
188 rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res,
189 void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst,
193 struct rio_dbell *dbell;
195 if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) {
202 dbell->dev_id = dev_id;
204 list_add_tail(&dbell->node, &mport->dbells);
211 * rio_request_inb_dbell - request inbound doorbell message service
212 * @mport: RIO master port from which to allocate the doorbell resource
213 * @dev_id: Device specific pointer to pass on event
214 * @start: Doorbell info range start
215 * @end: Doorbell info range end
216 * @dinb: Callback to execute when doorbell is received
218 * Requests ownership of an inbound doorbell resource and binds
219 * a callback function to the resource. Returns 0 if the request
220 * has been satisfied.
222 int rio_request_inb_dbell(struct rio_mport *mport,
226 void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src,
231 struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
234 rio_init_dbell_res(res, start, end);
236 /* Make sure these doorbells aren't in use */
238 request_resource(&mport->riores[RIO_DOORBELL_RESOURCE],
244 /* Hook the doorbell callback */
245 rc = rio_setup_inb_dbell(mport, dev_id, res, dinb);
254 * rio_release_inb_dbell - release inbound doorbell message service
255 * @mport: RIO master port from which to release the doorbell resource
256 * @start: Doorbell info range start
257 * @end: Doorbell info range end
259 * Releases ownership of an inbound doorbell resource and removes
260 * callback from the doorbell event list. Returns 0 if the request
261 * has been satisfied.
263 int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end)
265 int rc = 0, found = 0;
266 struct rio_dbell *dbell;
268 list_for_each_entry(dbell, &mport->dbells, node) {
269 if ((dbell->res->start == start) && (dbell->res->end == end)) {
275 /* If we can't find an exact match, fail */
281 /* Delete from list */
282 list_del(&dbell->node);
284 /* Release the doorbell resource */
285 rc = release_resource(dbell->res);
287 /* Free the doorbell event */
295 * rio_request_outb_dbell - request outbound doorbell message range
296 * @rdev: RIO device from which to allocate the doorbell resource
297 * @start: Doorbell message range start
298 * @end: Doorbell message range end
300 * Requests ownership of a doorbell message range. Returns a resource
301 * if the request has been satisfied or %NULL on failure.
303 struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start,
306 struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
309 rio_init_dbell_res(res, start, end);
311 /* Make sure these doorbells aren't in use */
312 if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res)
323 * rio_release_outb_dbell - release outbound doorbell message range
324 * @rdev: RIO device from which to release the doorbell resource
325 * @res: Doorbell resource to be freed
327 * Releases ownership of a doorbell message range. Returns 0 if the
328 * request has been satisfied.
330 int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res)
332 int rc = release_resource(res);
340 * rio_request_inb_pwrite - request inbound port-write message service
341 * @rdev: RIO device to which register inbound port-write callback routine
342 * @pwcback: Callback routine to execute when port-write is received
344 * Binds a port-write callback function to the RapidIO device.
345 * Returns 0 if the request has been satisfied.
347 int rio_request_inb_pwrite(struct rio_dev *rdev,
348 int (*pwcback)(struct rio_dev *rdev, union rio_pw_msg *msg, int step))
352 spin_lock(&rio_global_list_lock);
353 if (rdev->pwcback != NULL)
356 rdev->pwcback = pwcback;
358 spin_unlock(&rio_global_list_lock);
361 EXPORT_SYMBOL_GPL(rio_request_inb_pwrite);
364 * rio_release_inb_pwrite - release inbound port-write message service
365 * @rdev: RIO device which registered for inbound port-write callback
367 * Removes callback from the rio_dev structure. Returns 0 if the request
368 * has been satisfied.
370 int rio_release_inb_pwrite(struct rio_dev *rdev)
374 spin_lock(&rio_global_list_lock);
376 rdev->pwcback = NULL;
380 spin_unlock(&rio_global_list_lock);
383 EXPORT_SYMBOL_GPL(rio_release_inb_pwrite);
386 * rio_mport_get_physefb - Helper function that returns register offset
387 * for Physical Layer Extended Features Block.
388 * @port: Master port to issue transaction
389 * @local: Indicate a local master port or remote device access
390 * @destid: Destination ID of the device
391 * @hopcount: Number of switch hops to the device
394 rio_mport_get_physefb(struct rio_mport *port, int local,
395 u16 destid, u8 hopcount)
400 ext_ftr_ptr = rio_mport_get_efb(port, local, destid, hopcount, 0);
402 while (ext_ftr_ptr) {
404 rio_local_read_config_32(port, ext_ftr_ptr,
407 rio_mport_read_config_32(port, destid, hopcount,
408 ext_ftr_ptr, &ftr_header);
410 ftr_header = RIO_GET_BLOCK_ID(ftr_header);
411 switch (ftr_header) {
413 case RIO_EFB_SER_EP_ID_V13P:
414 case RIO_EFB_SER_EP_REC_ID_V13P:
415 case RIO_EFB_SER_EP_FREE_ID_V13P:
416 case RIO_EFB_SER_EP_ID:
417 case RIO_EFB_SER_EP_REC_ID:
418 case RIO_EFB_SER_EP_FREE_ID:
419 case RIO_EFB_SER_EP_FREC_ID:
427 ext_ftr_ptr = rio_mport_get_efb(port, local, destid,
428 hopcount, ext_ftr_ptr);
435 * rio_get_comptag - Begin or continue searching for a RIO device by component tag
436 * @comp_tag: RIO component tag to match
437 * @from: Previous RIO device found in search, or %NULL for new search
439 * Iterates through the list of known RIO devices. If a RIO device is
440 * found with a matching @comp_tag, a pointer to its device
441 * structure is returned. Otherwise, %NULL is returned. A new search
442 * is initiated by passing %NULL to the @from argument. Otherwise, if
443 * @from is not %NULL, searches continue from next device on the global
446 static struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from)
449 struct rio_dev *rdev;
451 spin_lock(&rio_global_list_lock);
452 n = from ? from->global_list.next : rio_devices.next;
454 while (n && (n != &rio_devices)) {
456 if (rdev->comp_tag == comp_tag)
462 spin_unlock(&rio_global_list_lock);
467 * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port.
468 * @rdev: Pointer to RIO device control structure
469 * @pnum: Switch port number to set LOCKOUT bit
470 * @lock: Operation : set (=1) or clear (=0)
472 int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock)
475 u16 destid = rdev->destid;
479 destid = rdev->rswitch->destid;
480 hopcount = rdev->rswitch->hopcount;
483 rio_mport_read_config_32(rdev->net->hport, destid, hopcount,
484 rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum),
487 regval |= RIO_PORT_N_CTL_LOCKOUT;
489 regval &= ~RIO_PORT_N_CTL_LOCKOUT;
491 rio_mport_write_config_32(rdev->net->hport, destid, hopcount,
492 rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum),
498 * rio_chk_dev_route - Validate route to the specified device.
499 * @rdev: RIO device failed to respond
500 * @nrdev: Last active device on the route to rdev
501 * @npnum: nrdev's port number on the route to rdev
503 * Follows a route to the specified RIO device to determine the last available
504 * device (and corresponding RIO port) on the route.
507 rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum)
510 int p_port, rc = -EIO;
511 struct rio_dev *prev = NULL;
513 /* Find switch with failed RIO link */
514 while (rdev->prev && (rdev->prev->pef & RIO_PEF_SWITCH)) {
515 if (!rio_read_config_32(rdev->prev, RIO_DEV_ID_CAR, &result)) {
525 /* Find port with failed RIO link */
527 p_port < RIO_GET_TOTAL_PORTS(prev->swpinfo); p_port++)
528 if (prev->rswitch->nextdev[p_port] == rdev)
531 if (p_port < RIO_GET_TOTAL_PORTS(prev->swpinfo)) {
532 pr_debug("RIO: link failed on [%s]-P%d\n",
533 rio_name(prev), p_port);
538 pr_debug("RIO: failed to trace route to %s\n", rio_name(prev));
544 * rio_mport_chk_dev_access - Validate access to the specified device.
545 * @mport: Master port to send transactions
546 * @destid: Device destination ID in network
547 * @hopcount: Number of hops into the network
550 rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount)
555 while (rio_mport_read_config_32(mport, destid, hopcount,
556 RIO_DEV_ID_CAR, &tmp)) {
558 if (i == RIO_MAX_CHK_RETRY)
567 * rio_chk_dev_access - Validate access to the specified device.
568 * @rdev: Pointer to RIO device control structure
570 static int rio_chk_dev_access(struct rio_dev *rdev)
573 u16 destid = rdev->destid;
576 destid = rdev->rswitch->destid;
577 hopcount = rdev->rswitch->hopcount;
580 return rio_mport_chk_dev_access(rdev->net->hport, destid, hopcount);
584 * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and
585 * returns link-response (if requested).
586 * @rdev: RIO devive to issue Input-status command
587 * @pnum: Device port number to issue the command
588 * @lnkresp: Response from a link partner
591 rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp)
593 struct rio_mport *mport = rdev->net->hport;
594 u16 destid = rdev->rswitch->destid;
595 u8 hopcount = rdev->rswitch->hopcount;
600 /* Read from link maintenance response register
601 * to clear valid bit */
602 rio_mport_read_config_32(mport, destid, hopcount,
603 rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum),
608 /* Issue Input-status command */
609 rio_mport_write_config_32(mport, destid, hopcount,
610 rdev->phys_efptr + RIO_PORT_N_MNT_REQ_CSR(pnum),
613 /* Exit if the response is not expected */
618 while (checkcount--) {
620 rio_mport_read_config_32(mport, destid, hopcount,
621 rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum),
623 if (regval & RIO_PORT_N_MNT_RSP_RVAL) {
633 * rio_clr_err_stopped - Clears port Error-stopped states.
634 * @rdev: Pointer to RIO device control structure
635 * @pnum: Switch port number to clear errors
636 * @err_status: port error status (if 0 reads register from device)
638 static int rio_clr_err_stopped(struct rio_dev *rdev, u32 pnum, u32 err_status)
640 struct rio_mport *mport = rdev->net->hport;
641 u16 destid = rdev->rswitch->destid;
642 u8 hopcount = rdev->rswitch->hopcount;
643 struct rio_dev *nextdev = rdev->rswitch->nextdev[pnum];
645 u32 far_ackid, far_linkstat, near_ackid;
648 rio_mport_read_config_32(mport, destid, hopcount,
649 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum),
652 if (err_status & RIO_PORT_N_ERR_STS_PW_OUT_ES) {
653 pr_debug("RIO_EM: servicing Output Error-Stopped state\n");
655 * Send a Link-Request/Input-Status control symbol
657 if (rio_get_input_status(rdev, pnum, ®val)) {
658 pr_debug("RIO_EM: Input-status response timeout\n");
662 pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n",
664 far_ackid = (regval & RIO_PORT_N_MNT_RSP_ASTAT) >> 5;
665 far_linkstat = regval & RIO_PORT_N_MNT_RSP_LSTAT;
666 rio_mport_read_config_32(mport, destid, hopcount,
667 rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum),
669 pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum, regval);
670 near_ackid = (regval & RIO_PORT_N_ACK_INBOUND) >> 24;
671 pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \
672 " near_ackID=0x%02x\n",
673 pnum, far_ackid, far_linkstat, near_ackid);
676 * If required, synchronize ackIDs of near and
679 if ((far_ackid != ((regval & RIO_PORT_N_ACK_OUTSTAND) >> 8)) ||
680 (far_ackid != (regval & RIO_PORT_N_ACK_OUTBOUND))) {
681 /* Align near outstanding/outbound ackIDs with
684 rio_mport_write_config_32(mport, destid,
685 hopcount, rdev->phys_efptr +
686 RIO_PORT_N_ACK_STS_CSR(pnum),
688 (far_ackid << 8) | far_ackid);
689 /* Align far outstanding/outbound ackIDs with
694 rio_write_config_32(nextdev,
695 nextdev->phys_efptr +
696 RIO_PORT_N_ACK_STS_CSR(RIO_GET_PORT_NUM(nextdev->swpinfo)),
698 (near_ackid << 8) | near_ackid);
700 pr_debug("RIO_EM: Invalid nextdev pointer (NULL)\n");
703 rio_mport_read_config_32(mport, destid, hopcount,
704 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum),
706 pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status);
709 if ((err_status & RIO_PORT_N_ERR_STS_PW_INP_ES) && nextdev) {
710 pr_debug("RIO_EM: servicing Input Error-Stopped state\n");
711 rio_get_input_status(nextdev,
712 RIO_GET_PORT_NUM(nextdev->swpinfo), NULL);
715 rio_mport_read_config_32(mport, destid, hopcount,
716 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum),
718 pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status);
721 return (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES |
722 RIO_PORT_N_ERR_STS_PW_INP_ES)) ? 1 : 0;
726 * rio_inb_pwrite_handler - process inbound port-write message
727 * @pw_msg: pointer to inbound port-write message
729 * Processes an inbound port-write message. Returns 0 if the request
730 * has been satisfied.
732 int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg)
734 struct rio_dev *rdev;
735 struct rio_mport *mport;
738 u32 err_status, em_perrdet, em_ltlerrdet;
741 rdev = rio_get_comptag(pw_msg->em.comptag, NULL);
743 /* Device removed or enumeration error */
744 pr_debug("RIO: %s No matching device for CTag 0x%08x\n",
745 __func__, pw_msg->em.comptag);
749 pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev));
754 for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32);) {
755 pr_debug("0x%02x: %08x %08x %08x %08x\n",
756 i*4, pw_msg->raw[i], pw_msg->raw[i + 1],
757 pw_msg->raw[i + 2], pw_msg->raw[i + 3]);
763 /* Call an external service function (if such is registered
764 * for this device). This may be the service for endpoints that send
765 * device-specific port-write messages. End-point messages expected
766 * to be handled completely by EP specific device driver.
767 * For switches rc==0 signals that no standard processing required.
769 if (rdev->pwcback != NULL) {
770 rc = rdev->pwcback(rdev, pw_msg, 0);
775 portnum = pw_msg->em.is_port & 0xFF;
777 /* Check if device and route to it are functional:
778 * Sometimes devices may send PW message(s) just before being
779 * powered down (or link being lost).
781 if (rio_chk_dev_access(rdev)) {
782 pr_debug("RIO: device access failed - get link partner\n");
783 /* Scan route to the device and identify failed link.
784 * This will replace device and port reported in PW message.
785 * PW message should not be used after this point.
787 if (rio_chk_dev_route(rdev, &rdev, &portnum)) {
788 pr_err("RIO: Route trace for %s failed\n",
795 /* For End-point devices processing stops here */
796 if (!(rdev->pef & RIO_PEF_SWITCH))
799 if (rdev->phys_efptr == 0) {
800 pr_err("RIO_PW: Bad switch initialization for %s\n",
805 mport = rdev->net->hport;
806 destid = rdev->rswitch->destid;
807 hopcount = rdev->rswitch->hopcount;
810 * Process the port-write notification from switch
812 if (rdev->rswitch->em_handle)
813 rdev->rswitch->em_handle(rdev, portnum);
815 rio_mport_read_config_32(mport, destid, hopcount,
816 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
818 pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status);
820 if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) {
822 if (!(rdev->rswitch->port_ok & (1 << portnum))) {
823 rdev->rswitch->port_ok |= (1 << portnum);
824 rio_set_port_lockout(rdev, portnum, 0);
825 /* Schedule Insertion Service */
826 pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n",
827 rio_name(rdev), portnum);
830 /* Clear error-stopped states (if reported).
831 * Depending on the link partner state, two attempts
832 * may be needed for successful recovery.
834 if (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES |
835 RIO_PORT_N_ERR_STS_PW_INP_ES)) {
836 if (rio_clr_err_stopped(rdev, portnum, err_status))
837 rio_clr_err_stopped(rdev, portnum, 0);
839 } else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */
841 if (rdev->rswitch->port_ok & (1 << portnum)) {
842 rdev->rswitch->port_ok &= ~(1 << portnum);
843 rio_set_port_lockout(rdev, portnum, 1);
845 rio_mport_write_config_32(mport, destid, hopcount,
847 RIO_PORT_N_ACK_STS_CSR(portnum),
848 RIO_PORT_N_ACK_CLEAR);
850 /* Schedule Extraction Service */
851 pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n",
852 rio_name(rdev), portnum);
856 rio_mport_read_config_32(mport, destid, hopcount,
857 rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet);
859 pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n",
860 portnum, em_perrdet);
861 /* Clear EM Port N Error Detect CSR */
862 rio_mport_write_config_32(mport, destid, hopcount,
863 rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0);
866 rio_mport_read_config_32(mport, destid, hopcount,
867 rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet);
869 pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n",
871 /* Clear EM L/T Layer Error Detect CSR */
872 rio_mport_write_config_32(mport, destid, hopcount,
873 rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0);
876 /* Clear remaining error bits */
877 rio_mport_write_config_32(mport, destid, hopcount,
878 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
879 err_status & RIO_PORT_N_ERR_STS_CLR_MASK);
881 /* Clear Port-Write Pending bit */
882 rio_mport_write_config_32(mport, destid, hopcount,
883 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
884 RIO_PORT_N_ERR_STS_PW_PEND);
888 EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler);
891 * rio_mport_get_efb - get pointer to next extended features block
892 * @port: Master port to issue transaction
893 * @local: Indicate a local master port or remote device access
894 * @destid: Destination ID of the device
895 * @hopcount: Number of switch hops to the device
896 * @from: Offset of current Extended Feature block header (if 0 starts
897 * from ExtFeaturePtr)
900 rio_mport_get_efb(struct rio_mport *port, int local, u16 destid,
901 u8 hopcount, u32 from)
907 rio_local_read_config_32(port, RIO_ASM_INFO_CAR,
910 rio_mport_read_config_32(port, destid, hopcount,
911 RIO_ASM_INFO_CAR, ®_val);
912 return reg_val & RIO_EXT_FTR_PTR_MASK;
915 rio_local_read_config_32(port, from, ®_val);
917 rio_mport_read_config_32(port, destid, hopcount,
919 return RIO_GET_BLOCK_ID(reg_val);
924 * rio_mport_get_feature - query for devices' extended features
925 * @port: Master port to issue transaction
926 * @local: Indicate a local master port or remote device access
927 * @destid: Destination ID of the device
928 * @hopcount: Number of switch hops to the device
929 * @ftr: Extended feature code
931 * Tell if a device supports a given RapidIO capability.
932 * Returns the offset of the requested extended feature
933 * block within the device's RIO configuration space or
934 * 0 in case the device does not support it. Possible
937 * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices
939 * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices
941 * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices
943 * %RIO_EFB_SER_EP_ID LP/Serial EP Devices
945 * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices
947 * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices
950 rio_mport_get_feature(struct rio_mport * port, int local, u16 destid,
951 u8 hopcount, int ftr)
953 u32 asm_info, ext_ftr_ptr, ftr_header;
956 rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info);
958 rio_mport_read_config_32(port, destid, hopcount,
959 RIO_ASM_INFO_CAR, &asm_info);
961 ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK;
963 while (ext_ftr_ptr) {
965 rio_local_read_config_32(port, ext_ftr_ptr,
968 rio_mport_read_config_32(port, destid, hopcount,
969 ext_ftr_ptr, &ftr_header);
970 if (RIO_GET_BLOCK_ID(ftr_header) == ftr)
972 if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header)))
980 * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did
981 * @vid: RIO vid to match or %RIO_ANY_ID to match all vids
982 * @did: RIO did to match or %RIO_ANY_ID to match all dids
983 * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids
984 * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids
985 * @from: Previous RIO device found in search, or %NULL for new search
987 * Iterates through the list of known RIO devices. If a RIO device is
988 * found with a matching @vid, @did, @asm_vid, @asm_did, the reference
989 * count to the device is incrememted and a pointer to its device
990 * structure is returned. Otherwise, %NULL is returned. A new search
991 * is initiated by passing %NULL to the @from argument. Otherwise, if
992 * @from is not %NULL, searches continue from next device on the global
993 * list. The reference count for @from is always decremented if it is
996 struct rio_dev *rio_get_asm(u16 vid, u16 did,
997 u16 asm_vid, u16 asm_did, struct rio_dev *from)
1000 struct rio_dev *rdev;
1002 WARN_ON(in_interrupt());
1003 spin_lock(&rio_global_list_lock);
1004 n = from ? from->global_list.next : rio_devices.next;
1006 while (n && (n != &rio_devices)) {
1007 rdev = rio_dev_g(n);
1008 if ((vid == RIO_ANY_ID || rdev->vid == vid) &&
1009 (did == RIO_ANY_ID || rdev->did == did) &&
1010 (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) &&
1011 (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did))
1018 rdev = rio_dev_get(rdev);
1019 spin_unlock(&rio_global_list_lock);
1024 * rio_get_device - Begin or continue searching for a RIO device by vid/did
1025 * @vid: RIO vid to match or %RIO_ANY_ID to match all vids
1026 * @did: RIO did to match or %RIO_ANY_ID to match all dids
1027 * @from: Previous RIO device found in search, or %NULL for new search
1029 * Iterates through the list of known RIO devices. If a RIO device is
1030 * found with a matching @vid and @did, the reference count to the
1031 * device is incrememted and a pointer to its device structure is returned.
1032 * Otherwise, %NULL is returned. A new search is initiated by passing %NULL
1033 * to the @from argument. Otherwise, if @from is not %NULL, searches
1034 * continue from next device on the global list. The reference count for
1035 * @from is always decremented if it is not %NULL.
1037 struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from)
1039 return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from);
1043 * rio_std_route_add_entry - Add switch route table entry using standard
1044 * registers defined in RIO specification rev.1.3
1045 * @mport: Master port to issue transaction
1046 * @destid: Destination ID of the device
1047 * @hopcount: Number of switch hops to the device
1048 * @table: routing table ID (global or port-specific)
1049 * @route_destid: destID entry in the RT
1050 * @route_port: destination port for specified destID
1052 int rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
1053 u16 table, u16 route_destid, u8 route_port)
1055 if (table == RIO_GLOBAL_TABLE) {
1056 rio_mport_write_config_32(mport, destid, hopcount,
1057 RIO_STD_RTE_CONF_DESTID_SEL_CSR,
1059 rio_mport_write_config_32(mport, destid, hopcount,
1060 RIO_STD_RTE_CONF_PORT_SEL_CSR,
1069 * rio_std_route_get_entry - Read switch route table entry (port number)
1070 * associated with specified destID using standard registers defined in RIO
1071 * specification rev.1.3
1072 * @mport: Master port to issue transaction
1073 * @destid: Destination ID of the device
1074 * @hopcount: Number of switch hops to the device
1075 * @table: routing table ID (global or port-specific)
1076 * @route_destid: destID entry in the RT
1077 * @route_port: returned destination port for specified destID
1079 int rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
1080 u16 table, u16 route_destid, u8 *route_port)
1084 if (table == RIO_GLOBAL_TABLE) {
1085 rio_mport_write_config_32(mport, destid, hopcount,
1086 RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid);
1087 rio_mport_read_config_32(mport, destid, hopcount,
1088 RIO_STD_RTE_CONF_PORT_SEL_CSR, &result);
1090 *route_port = (u8)result;
1097 * rio_std_route_clr_table - Clear swotch route table using standard registers
1098 * defined in RIO specification rev.1.3.
1099 * @mport: Master port to issue transaction
1100 * @destid: Destination ID of the device
1101 * @hopcount: Number of switch hops to the device
1102 * @table: routing table ID (global or port-specific)
1104 int rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
1107 u32 max_destid = 0xff;
1108 u32 i, pef, id_inc = 1, ext_cfg = 0;
1109 u32 port_sel = RIO_INVALID_ROUTE;
1111 if (table == RIO_GLOBAL_TABLE) {
1112 rio_mport_read_config_32(mport, destid, hopcount,
1115 if (mport->sys_size) {
1116 rio_mport_read_config_32(mport, destid, hopcount,
1117 RIO_SWITCH_RT_LIMIT,
1119 max_destid &= RIO_RT_MAX_DESTID;
1122 if (pef & RIO_PEF_EXT_RT) {
1123 ext_cfg = 0x80000000;
1125 port_sel = (RIO_INVALID_ROUTE << 24) |
1126 (RIO_INVALID_ROUTE << 16) |
1127 (RIO_INVALID_ROUTE << 8) |
1131 for (i = 0; i <= max_destid;) {
1132 rio_mport_write_config_32(mport, destid, hopcount,
1133 RIO_STD_RTE_CONF_DESTID_SEL_CSR,
1135 rio_mport_write_config_32(mport, destid, hopcount,
1136 RIO_STD_RTE_CONF_PORT_SEL_CSR,
1146 static void rio_fixup_device(struct rio_dev *dev)
1150 static int __devinit rio_init(void)
1152 struct rio_dev *dev = NULL;
1154 while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) {
1155 rio_fixup_device(dev);
1160 device_initcall(rio_init);
1162 int __devinit rio_init_mports(void)
1165 struct rio_mport *port;
1167 list_for_each_entry(port, &rio_mports, node) {
1168 if (!request_mem_region(port->iores.start,
1169 port->iores.end - port->iores.start,
1172 "RIO: Error requesting master port region 0x%016llx-0x%016llx\n",
1173 (u64)port->iores.start, (u64)port->iores.end - 1);
1178 if (port->host_deviceid >= 0)
1179 rio_enum_mport(port);
1181 rio_disc_mport(port);
1188 void rio_register_mport(struct rio_mport *port)
1190 list_add_tail(&port->node, &rio_mports);
1193 EXPORT_SYMBOL_GPL(rio_local_get_device_id);
1194 EXPORT_SYMBOL_GPL(rio_get_device);
1195 EXPORT_SYMBOL_GPL(rio_get_asm);
1196 EXPORT_SYMBOL_GPL(rio_request_inb_dbell);
1197 EXPORT_SYMBOL_GPL(rio_release_inb_dbell);
1198 EXPORT_SYMBOL_GPL(rio_request_outb_dbell);
1199 EXPORT_SYMBOL_GPL(rio_release_outb_dbell);
1200 EXPORT_SYMBOL_GPL(rio_request_inb_mbox);
1201 EXPORT_SYMBOL_GPL(rio_release_inb_mbox);
1202 EXPORT_SYMBOL_GPL(rio_request_outb_mbox);
1203 EXPORT_SYMBOL_GPL(rio_release_outb_mbox);