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 err
= device_register(&rdev
->dev
);
156 spin_lock(&rio_global_list_lock
);
157 list_add_tail(&rdev
->global_list
, &rio_devices
);
159 list_add_tail(&rdev
->net_list
, &rdev
->net
->devices
);
160 if (rdev
->pef
& RIO_PEF_SWITCH
)
161 list_add_tail(&rdev
->rswitch
->node
,
162 &rdev
->net
->switches
);
164 spin_unlock(&rio_global_list_lock
);
166 rio_create_sysfs_dev_files(rdev
);
170 EXPORT_SYMBOL_GPL(rio_add_device
);
173 * rio_del_device - removes a RIO device from the device model
176 * Removes the RIO device to the kernel device list and subsystem's device list.
177 * Clears sysfs entries for the removed device.
179 void rio_del_device(struct rio_dev
*rdev
)
181 pr_debug("RIO: %s: removing %s\n", __func__
, rio_name(rdev
));
182 spin_lock(&rio_global_list_lock
);
183 list_del(&rdev
->global_list
);
185 list_del(&rdev
->net_list
);
186 if (rdev
->pef
& RIO_PEF_SWITCH
) {
187 list_del(&rdev
->rswitch
->node
);
188 kfree(rdev
->rswitch
->route_table
);
191 spin_unlock(&rio_global_list_lock
);
192 rio_remove_sysfs_dev_files(rdev
);
193 device_unregister(&rdev
->dev
);
195 EXPORT_SYMBOL_GPL(rio_del_device
);
198 * rio_request_inb_mbox - request inbound mailbox service
199 * @mport: RIO master port from which to allocate the mailbox resource
200 * @dev_id: Device specific pointer to pass on event
201 * @mbox: Mailbox number to claim
202 * @entries: Number of entries in inbound mailbox queue
203 * @minb: Callback to execute when inbound message is received
205 * Requests ownership of an inbound mailbox resource and binds
206 * a callback function to the resource. Returns %0 on success.
208 int rio_request_inb_mbox(struct rio_mport
*mport
,
212 void (*minb
) (struct rio_mport
* mport
, void *dev_id
, int mbox
,
216 struct resource
*res
;
218 if (mport
->ops
->open_inb_mbox
== NULL
)
221 res
= kzalloc(sizeof(struct resource
), GFP_KERNEL
);
224 rio_init_mbox_res(res
, mbox
, mbox
);
226 /* Make sure this mailbox isn't in use */
228 request_resource(&mport
->riores
[RIO_INB_MBOX_RESOURCE
],
234 mport
->inb_msg
[mbox
].res
= res
;
236 /* Hook the inbound message callback */
237 mport
->inb_msg
[mbox
].mcback
= minb
;
239 rc
= mport
->ops
->open_inb_mbox(mport
, dev_id
, mbox
, entries
);
248 * rio_release_inb_mbox - release inbound mailbox message service
249 * @mport: RIO master port from which to release the mailbox resource
250 * @mbox: Mailbox number to release
252 * Releases ownership of an inbound mailbox resource. Returns 0
253 * if the request has been satisfied.
255 int rio_release_inb_mbox(struct rio_mport
*mport
, int mbox
)
257 if (mport
->ops
->close_inb_mbox
) {
258 mport
->ops
->close_inb_mbox(mport
, mbox
);
260 /* Release the mailbox resource */
261 return release_resource(mport
->inb_msg
[mbox
].res
);
267 * rio_request_outb_mbox - request outbound mailbox service
268 * @mport: RIO master port from which to allocate the mailbox resource
269 * @dev_id: Device specific pointer to pass on event
270 * @mbox: Mailbox number to claim
271 * @entries: Number of entries in outbound mailbox queue
272 * @moutb: Callback to execute when outbound message is sent
274 * Requests ownership of an outbound mailbox resource and binds
275 * a callback function to the resource. Returns 0 on success.
277 int rio_request_outb_mbox(struct rio_mport
*mport
,
281 void (*moutb
) (struct rio_mport
* mport
, void *dev_id
, int mbox
, int slot
))
284 struct resource
*res
;
286 if (mport
->ops
->open_outb_mbox
== NULL
)
289 res
= kzalloc(sizeof(struct resource
), GFP_KERNEL
);
292 rio_init_mbox_res(res
, mbox
, mbox
);
294 /* Make sure this outbound mailbox isn't in use */
296 request_resource(&mport
->riores
[RIO_OUTB_MBOX_RESOURCE
],
302 mport
->outb_msg
[mbox
].res
= res
;
304 /* Hook the inbound message callback */
305 mport
->outb_msg
[mbox
].mcback
= moutb
;
307 rc
= mport
->ops
->open_outb_mbox(mport
, dev_id
, mbox
, entries
);
316 * rio_release_outb_mbox - release outbound mailbox message service
317 * @mport: RIO master port from which to release the mailbox resource
318 * @mbox: Mailbox number to release
320 * Releases ownership of an inbound mailbox resource. Returns 0
321 * if the request has been satisfied.
323 int rio_release_outb_mbox(struct rio_mport
*mport
, int mbox
)
325 if (mport
->ops
->close_outb_mbox
) {
326 mport
->ops
->close_outb_mbox(mport
, mbox
);
328 /* Release the mailbox resource */
329 return release_resource(mport
->outb_msg
[mbox
].res
);
335 * rio_setup_inb_dbell - bind inbound doorbell callback
336 * @mport: RIO master port to bind the doorbell callback
337 * @dev_id: Device specific pointer to pass on event
338 * @res: Doorbell message resource
339 * @dinb: Callback to execute when doorbell is received
341 * Adds a doorbell resource/callback pair into a port's
342 * doorbell event list. Returns 0 if the request has been
346 rio_setup_inb_dbell(struct rio_mport
*mport
, void *dev_id
, struct resource
*res
,
347 void (*dinb
) (struct rio_mport
* mport
, void *dev_id
, u16 src
, u16 dst
,
351 struct rio_dbell
*dbell
;
353 if (!(dbell
= kmalloc(sizeof(struct rio_dbell
), GFP_KERNEL
))) {
360 dbell
->dev_id
= dev_id
;
362 list_add_tail(&dbell
->node
, &mport
->dbells
);
369 * rio_request_inb_dbell - request inbound doorbell message service
370 * @mport: RIO master port from which to allocate the doorbell resource
371 * @dev_id: Device specific pointer to pass on event
372 * @start: Doorbell info range start
373 * @end: Doorbell info range end
374 * @dinb: Callback to execute when doorbell is received
376 * Requests ownership of an inbound doorbell resource and binds
377 * a callback function to the resource. Returns 0 if the request
378 * has been satisfied.
380 int rio_request_inb_dbell(struct rio_mport
*mport
,
384 void (*dinb
) (struct rio_mport
* mport
, void *dev_id
, u16 src
,
389 struct resource
*res
= kzalloc(sizeof(struct resource
), GFP_KERNEL
);
392 rio_init_dbell_res(res
, start
, end
);
394 /* Make sure these doorbells aren't in use */
396 request_resource(&mport
->riores
[RIO_DOORBELL_RESOURCE
],
402 /* Hook the doorbell callback */
403 rc
= rio_setup_inb_dbell(mport
, dev_id
, res
, dinb
);
412 * rio_release_inb_dbell - release inbound doorbell message service
413 * @mport: RIO master port from which to release the doorbell resource
414 * @start: Doorbell info range start
415 * @end: Doorbell info range end
417 * Releases ownership of an inbound doorbell resource and removes
418 * callback from the doorbell event list. Returns 0 if the request
419 * has been satisfied.
421 int rio_release_inb_dbell(struct rio_mport
*mport
, u16 start
, u16 end
)
423 int rc
= 0, found
= 0;
424 struct rio_dbell
*dbell
;
426 list_for_each_entry(dbell
, &mport
->dbells
, node
) {
427 if ((dbell
->res
->start
== start
) && (dbell
->res
->end
== end
)) {
433 /* If we can't find an exact match, fail */
439 /* Delete from list */
440 list_del(&dbell
->node
);
442 /* Release the doorbell resource */
443 rc
= release_resource(dbell
->res
);
445 /* Free the doorbell event */
453 * rio_request_outb_dbell - request outbound doorbell message range
454 * @rdev: RIO device from which to allocate the doorbell resource
455 * @start: Doorbell message range start
456 * @end: Doorbell message range end
458 * Requests ownership of a doorbell message range. Returns a resource
459 * if the request has been satisfied or %NULL on failure.
461 struct resource
*rio_request_outb_dbell(struct rio_dev
*rdev
, u16 start
,
464 struct resource
*res
= kzalloc(sizeof(struct resource
), GFP_KERNEL
);
467 rio_init_dbell_res(res
, start
, end
);
469 /* Make sure these doorbells aren't in use */
470 if (request_resource(&rdev
->riores
[RIO_DOORBELL_RESOURCE
], res
)
481 * rio_release_outb_dbell - release outbound doorbell message range
482 * @rdev: RIO device from which to release the doorbell resource
483 * @res: Doorbell resource to be freed
485 * Releases ownership of a doorbell message range. Returns 0 if the
486 * request has been satisfied.
488 int rio_release_outb_dbell(struct rio_dev
*rdev
, struct resource
*res
)
490 int rc
= release_resource(res
);
498 * rio_request_inb_pwrite - request inbound port-write message service
499 * @rdev: RIO device to which register inbound port-write callback routine
500 * @pwcback: Callback routine to execute when port-write is received
502 * Binds a port-write callback function to the RapidIO device.
503 * Returns 0 if the request has been satisfied.
505 int rio_request_inb_pwrite(struct rio_dev
*rdev
,
506 int (*pwcback
)(struct rio_dev
*rdev
, union rio_pw_msg
*msg
, int step
))
510 spin_lock(&rio_global_list_lock
);
511 if (rdev
->pwcback
!= NULL
)
514 rdev
->pwcback
= pwcback
;
516 spin_unlock(&rio_global_list_lock
);
519 EXPORT_SYMBOL_GPL(rio_request_inb_pwrite
);
522 * rio_release_inb_pwrite - release inbound port-write message service
523 * @rdev: RIO device which registered for inbound port-write callback
525 * Removes callback from the rio_dev structure. Returns 0 if the request
526 * has been satisfied.
528 int rio_release_inb_pwrite(struct rio_dev
*rdev
)
532 spin_lock(&rio_global_list_lock
);
534 rdev
->pwcback
= NULL
;
538 spin_unlock(&rio_global_list_lock
);
541 EXPORT_SYMBOL_GPL(rio_release_inb_pwrite
);
544 * rio_map_inb_region -- Map inbound memory region.
545 * @mport: Master port.
546 * @local: physical address of memory region to be mapped
547 * @rbase: RIO base address assigned to this window
548 * @size: Size of the memory region
549 * @rflags: Flags for mapping.
551 * Return: 0 -- Success.
553 * This function will create the mapping from RIO space to local memory.
555 int rio_map_inb_region(struct rio_mport
*mport
, dma_addr_t local
,
556 u64 rbase
, u32 size
, u32 rflags
)
561 if (!mport
->ops
->map_inb
)
563 spin_lock_irqsave(&rio_mmap_lock
, flags
);
564 rc
= mport
->ops
->map_inb(mport
, local
, rbase
, size
, rflags
);
565 spin_unlock_irqrestore(&rio_mmap_lock
, flags
);
568 EXPORT_SYMBOL_GPL(rio_map_inb_region
);
571 * rio_unmap_inb_region -- Unmap the inbound memory region
572 * @mport: Master port
573 * @lstart: physical address of memory region to be unmapped
575 void rio_unmap_inb_region(struct rio_mport
*mport
, dma_addr_t lstart
)
578 if (!mport
->ops
->unmap_inb
)
580 spin_lock_irqsave(&rio_mmap_lock
, flags
);
581 mport
->ops
->unmap_inb(mport
, lstart
);
582 spin_unlock_irqrestore(&rio_mmap_lock
, flags
);
584 EXPORT_SYMBOL_GPL(rio_unmap_inb_region
);
587 * rio_mport_get_physefb - Helper function that returns register offset
588 * for Physical Layer Extended Features Block.
589 * @port: Master port to issue transaction
590 * @local: Indicate a local master port or remote device access
591 * @destid: Destination ID of the device
592 * @hopcount: Number of switch hops to the device
595 rio_mport_get_physefb(struct rio_mport
*port
, int local
,
596 u16 destid
, u8 hopcount
)
601 ext_ftr_ptr
= rio_mport_get_efb(port
, local
, destid
, hopcount
, 0);
603 while (ext_ftr_ptr
) {
605 rio_local_read_config_32(port
, ext_ftr_ptr
,
608 rio_mport_read_config_32(port
, destid
, hopcount
,
609 ext_ftr_ptr
, &ftr_header
);
611 ftr_header
= RIO_GET_BLOCK_ID(ftr_header
);
612 switch (ftr_header
) {
614 case RIO_EFB_SER_EP_ID_V13P
:
615 case RIO_EFB_SER_EP_REC_ID_V13P
:
616 case RIO_EFB_SER_EP_FREE_ID_V13P
:
617 case RIO_EFB_SER_EP_ID
:
618 case RIO_EFB_SER_EP_REC_ID
:
619 case RIO_EFB_SER_EP_FREE_ID
:
620 case RIO_EFB_SER_EP_FREC_ID
:
628 ext_ftr_ptr
= rio_mport_get_efb(port
, local
, destid
,
629 hopcount
, ext_ftr_ptr
);
634 EXPORT_SYMBOL_GPL(rio_mport_get_physefb
);
637 * rio_get_comptag - Begin or continue searching for a RIO device by component tag
638 * @comp_tag: RIO component tag to match
639 * @from: Previous RIO device found in search, or %NULL for new search
641 * Iterates through the list of known RIO devices. If a RIO device is
642 * found with a matching @comp_tag, a pointer to its device
643 * structure is returned. Otherwise, %NULL is returned. A new search
644 * is initiated by passing %NULL to the @from argument. Otherwise, if
645 * @from is not %NULL, searches continue from next device on the global
648 struct rio_dev
*rio_get_comptag(u32 comp_tag
, struct rio_dev
*from
)
651 struct rio_dev
*rdev
;
653 spin_lock(&rio_global_list_lock
);
654 n
= from
? from
->global_list
.next
: rio_devices
.next
;
656 while (n
&& (n
!= &rio_devices
)) {
658 if (rdev
->comp_tag
== comp_tag
)
664 spin_unlock(&rio_global_list_lock
);
667 EXPORT_SYMBOL_GPL(rio_get_comptag
);
670 * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port.
671 * @rdev: Pointer to RIO device control structure
672 * @pnum: Switch port number to set LOCKOUT bit
673 * @lock: Operation : set (=1) or clear (=0)
675 int rio_set_port_lockout(struct rio_dev
*rdev
, u32 pnum
, int lock
)
679 rio_read_config_32(rdev
,
680 rdev
->phys_efptr
+ RIO_PORT_N_CTL_CSR(pnum
),
683 regval
|= RIO_PORT_N_CTL_LOCKOUT
;
685 regval
&= ~RIO_PORT_N_CTL_LOCKOUT
;
687 rio_write_config_32(rdev
,
688 rdev
->phys_efptr
+ RIO_PORT_N_CTL_CSR(pnum
),
692 EXPORT_SYMBOL_GPL(rio_set_port_lockout
);
695 * rio_enable_rx_tx_port - enable input receiver and output transmitter of
697 * @port: Master port associated with the RIO network
698 * @local: local=1 select local port otherwise a far device is reached
699 * @destid: Destination ID of the device to check host bit
700 * @hopcount: Number of hops to reach the target
701 * @port_num: Port (-number on switch) to enable on a far end device
703 * Returns 0 or 1 from on General Control Command and Status Register
706 int rio_enable_rx_tx_port(struct rio_mport
*port
,
707 int local
, u16 destid
,
708 u8 hopcount
, u8 port_num
)
710 #ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS
715 * enable rx input tx output port
717 pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = "
718 "%d, port_num = %d)\n", local
, destid
, hopcount
, port_num
);
720 ext_ftr_ptr
= rio_mport_get_physefb(port
, local
, destid
, hopcount
);
723 rio_local_read_config_32(port
, ext_ftr_ptr
+
724 RIO_PORT_N_CTL_CSR(0),
727 if (rio_mport_read_config_32(port
, destid
, hopcount
,
728 ext_ftr_ptr
+ RIO_PORT_N_CTL_CSR(port_num
), ®val
) < 0)
732 if (regval
& RIO_PORT_N_CTL_P_TYP_SER
) {
734 regval
= regval
| RIO_PORT_N_CTL_EN_RX_SER
735 | RIO_PORT_N_CTL_EN_TX_SER
;
738 regval
= regval
| RIO_PORT_N_CTL_EN_RX_PAR
739 | RIO_PORT_N_CTL_EN_TX_PAR
;
743 rio_local_write_config_32(port
, ext_ftr_ptr
+
744 RIO_PORT_N_CTL_CSR(0), regval
);
746 if (rio_mport_write_config_32(port
, destid
, hopcount
,
747 ext_ftr_ptr
+ RIO_PORT_N_CTL_CSR(port_num
), regval
) < 0)
753 EXPORT_SYMBOL_GPL(rio_enable_rx_tx_port
);
757 * rio_chk_dev_route - Validate route to the specified device.
758 * @rdev: RIO device failed to respond
759 * @nrdev: Last active device on the route to rdev
760 * @npnum: nrdev's port number on the route to rdev
762 * Follows a route to the specified RIO device to determine the last available
763 * device (and corresponding RIO port) on the route.
766 rio_chk_dev_route(struct rio_dev
*rdev
, struct rio_dev
**nrdev
, int *npnum
)
769 int p_port
, rc
= -EIO
;
770 struct rio_dev
*prev
= NULL
;
772 /* Find switch with failed RIO link */
773 while (rdev
->prev
&& (rdev
->prev
->pef
& RIO_PEF_SWITCH
)) {
774 if (!rio_read_config_32(rdev
->prev
, RIO_DEV_ID_CAR
, &result
)) {
784 p_port
= prev
->rswitch
->route_table
[rdev
->destid
];
786 if (p_port
!= RIO_INVALID_ROUTE
) {
787 pr_debug("RIO: link failed on [%s]-P%d\n",
788 rio_name(prev
), p_port
);
793 pr_debug("RIO: failed to trace route to %s\n", rio_name(rdev
));
799 * rio_mport_chk_dev_access - Validate access to the specified device.
800 * @mport: Master port to send transactions
801 * @destid: Device destination ID in network
802 * @hopcount: Number of hops into the network
805 rio_mport_chk_dev_access(struct rio_mport
*mport
, u16 destid
, u8 hopcount
)
810 while (rio_mport_read_config_32(mport
, destid
, hopcount
,
811 RIO_DEV_ID_CAR
, &tmp
)) {
813 if (i
== RIO_MAX_CHK_RETRY
)
820 EXPORT_SYMBOL_GPL(rio_mport_chk_dev_access
);
823 * rio_chk_dev_access - Validate access to the specified device.
824 * @rdev: Pointer to RIO device control structure
826 static int rio_chk_dev_access(struct rio_dev
*rdev
)
828 return rio_mport_chk_dev_access(rdev
->net
->hport
,
829 rdev
->destid
, rdev
->hopcount
);
833 * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and
834 * returns link-response (if requested).
835 * @rdev: RIO devive to issue Input-status command
836 * @pnum: Device port number to issue the command
837 * @lnkresp: Response from a link partner
840 rio_get_input_status(struct rio_dev
*rdev
, int pnum
, u32
*lnkresp
)
846 /* Read from link maintenance response register
847 * to clear valid bit */
848 rio_read_config_32(rdev
,
849 rdev
->phys_efptr
+ RIO_PORT_N_MNT_RSP_CSR(pnum
),
854 /* Issue Input-status command */
855 rio_write_config_32(rdev
,
856 rdev
->phys_efptr
+ RIO_PORT_N_MNT_REQ_CSR(pnum
),
859 /* Exit if the response is not expected */
864 while (checkcount
--) {
866 rio_read_config_32(rdev
,
867 rdev
->phys_efptr
+ RIO_PORT_N_MNT_RSP_CSR(pnum
),
869 if (regval
& RIO_PORT_N_MNT_RSP_RVAL
) {
879 * rio_clr_err_stopped - Clears port Error-stopped states.
880 * @rdev: Pointer to RIO device control structure
881 * @pnum: Switch port number to clear errors
882 * @err_status: port error status (if 0 reads register from device)
884 static int rio_clr_err_stopped(struct rio_dev
*rdev
, u32 pnum
, u32 err_status
)
886 struct rio_dev
*nextdev
= rdev
->rswitch
->nextdev
[pnum
];
888 u32 far_ackid
, far_linkstat
, near_ackid
;
891 rio_read_config_32(rdev
,
892 rdev
->phys_efptr
+ RIO_PORT_N_ERR_STS_CSR(pnum
),
895 if (err_status
& RIO_PORT_N_ERR_STS_PW_OUT_ES
) {
896 pr_debug("RIO_EM: servicing Output Error-Stopped state\n");
898 * Send a Link-Request/Input-Status control symbol
900 if (rio_get_input_status(rdev
, pnum
, ®val
)) {
901 pr_debug("RIO_EM: Input-status response timeout\n");
905 pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n",
907 far_ackid
= (regval
& RIO_PORT_N_MNT_RSP_ASTAT
) >> 5;
908 far_linkstat
= regval
& RIO_PORT_N_MNT_RSP_LSTAT
;
909 rio_read_config_32(rdev
,
910 rdev
->phys_efptr
+ RIO_PORT_N_ACK_STS_CSR(pnum
),
912 pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum
, regval
);
913 near_ackid
= (regval
& RIO_PORT_N_ACK_INBOUND
) >> 24;
914 pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \
915 " near_ackID=0x%02x\n",
916 pnum
, far_ackid
, far_linkstat
, near_ackid
);
919 * If required, synchronize ackIDs of near and
922 if ((far_ackid
!= ((regval
& RIO_PORT_N_ACK_OUTSTAND
) >> 8)) ||
923 (far_ackid
!= (regval
& RIO_PORT_N_ACK_OUTBOUND
))) {
924 /* Align near outstanding/outbound ackIDs with
927 rio_write_config_32(rdev
,
928 rdev
->phys_efptr
+ RIO_PORT_N_ACK_STS_CSR(pnum
),
930 (far_ackid
<< 8) | far_ackid
);
931 /* Align far outstanding/outbound ackIDs with
936 rio_write_config_32(nextdev
,
937 nextdev
->phys_efptr
+
938 RIO_PORT_N_ACK_STS_CSR(RIO_GET_PORT_NUM(nextdev
->swpinfo
)),
940 (near_ackid
<< 8) | near_ackid
);
942 pr_debug("RIO_EM: Invalid nextdev pointer (NULL)\n");
945 rio_read_config_32(rdev
,
946 rdev
->phys_efptr
+ RIO_PORT_N_ERR_STS_CSR(pnum
),
948 pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum
, err_status
);
951 if ((err_status
& RIO_PORT_N_ERR_STS_PW_INP_ES
) && nextdev
) {
952 pr_debug("RIO_EM: servicing Input Error-Stopped state\n");
953 rio_get_input_status(nextdev
,
954 RIO_GET_PORT_NUM(nextdev
->swpinfo
), NULL
);
957 rio_read_config_32(rdev
,
958 rdev
->phys_efptr
+ RIO_PORT_N_ERR_STS_CSR(pnum
),
960 pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum
, err_status
);
963 return (err_status
& (RIO_PORT_N_ERR_STS_PW_OUT_ES
|
964 RIO_PORT_N_ERR_STS_PW_INP_ES
)) ? 1 : 0;
968 * rio_inb_pwrite_handler - process inbound port-write message
969 * @pw_msg: pointer to inbound port-write message
971 * Processes an inbound port-write message. Returns 0 if the request
972 * has been satisfied.
974 int rio_inb_pwrite_handler(union rio_pw_msg
*pw_msg
)
976 struct rio_dev
*rdev
;
977 u32 err_status
, em_perrdet
, em_ltlerrdet
;
980 rdev
= rio_get_comptag((pw_msg
->em
.comptag
& RIO_CTAG_UDEVID
), NULL
);
982 /* Device removed or enumeration error */
983 pr_debug("RIO: %s No matching device for CTag 0x%08x\n",
984 __func__
, pw_msg
->em
.comptag
);
988 pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev
));
993 for (i
= 0; i
< RIO_PW_MSG_SIZE
/sizeof(u32
);) {
994 pr_debug("0x%02x: %08x %08x %08x %08x\n",
995 i
*4, pw_msg
->raw
[i
], pw_msg
->raw
[i
+ 1],
996 pw_msg
->raw
[i
+ 2], pw_msg
->raw
[i
+ 3]);
1002 /* Call an external service function (if such is registered
1003 * for this device). This may be the service for endpoints that send
1004 * device-specific port-write messages. End-point messages expected
1005 * to be handled completely by EP specific device driver.
1006 * For switches rc==0 signals that no standard processing required.
1008 if (rdev
->pwcback
!= NULL
) {
1009 rc
= rdev
->pwcback(rdev
, pw_msg
, 0);
1014 portnum
= pw_msg
->em
.is_port
& 0xFF;
1016 /* Check if device and route to it are functional:
1017 * Sometimes devices may send PW message(s) just before being
1018 * powered down (or link being lost).
1020 if (rio_chk_dev_access(rdev
)) {
1021 pr_debug("RIO: device access failed - get link partner\n");
1022 /* Scan route to the device and identify failed link.
1023 * This will replace device and port reported in PW message.
1024 * PW message should not be used after this point.
1026 if (rio_chk_dev_route(rdev
, &rdev
, &portnum
)) {
1027 pr_err("RIO: Route trace for %s failed\n",
1034 /* For End-point devices processing stops here */
1035 if (!(rdev
->pef
& RIO_PEF_SWITCH
))
1038 if (rdev
->phys_efptr
== 0) {
1039 pr_err("RIO_PW: Bad switch initialization for %s\n",
1045 * Process the port-write notification from switch
1047 if (rdev
->rswitch
->ops
&& rdev
->rswitch
->ops
->em_handle
)
1048 rdev
->rswitch
->ops
->em_handle(rdev
, portnum
);
1050 rio_read_config_32(rdev
,
1051 rdev
->phys_efptr
+ RIO_PORT_N_ERR_STS_CSR(portnum
),
1053 pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum
, err_status
);
1055 if (err_status
& RIO_PORT_N_ERR_STS_PORT_OK
) {
1057 if (!(rdev
->rswitch
->port_ok
& (1 << portnum
))) {
1058 rdev
->rswitch
->port_ok
|= (1 << portnum
);
1059 rio_set_port_lockout(rdev
, portnum
, 0);
1060 /* Schedule Insertion Service */
1061 pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n",
1062 rio_name(rdev
), portnum
);
1065 /* Clear error-stopped states (if reported).
1066 * Depending on the link partner state, two attempts
1067 * may be needed for successful recovery.
1069 if (err_status
& (RIO_PORT_N_ERR_STS_PW_OUT_ES
|
1070 RIO_PORT_N_ERR_STS_PW_INP_ES
)) {
1071 if (rio_clr_err_stopped(rdev
, portnum
, err_status
))
1072 rio_clr_err_stopped(rdev
, portnum
, 0);
1074 } else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */
1076 if (rdev
->rswitch
->port_ok
& (1 << portnum
)) {
1077 rdev
->rswitch
->port_ok
&= ~(1 << portnum
);
1078 rio_set_port_lockout(rdev
, portnum
, 1);
1080 rio_write_config_32(rdev
,
1082 RIO_PORT_N_ACK_STS_CSR(portnum
),
1083 RIO_PORT_N_ACK_CLEAR
);
1085 /* Schedule Extraction Service */
1086 pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n",
1087 rio_name(rdev
), portnum
);
1091 rio_read_config_32(rdev
,
1092 rdev
->em_efptr
+ RIO_EM_PN_ERR_DETECT(portnum
), &em_perrdet
);
1094 pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n",
1095 portnum
, em_perrdet
);
1096 /* Clear EM Port N Error Detect CSR */
1097 rio_write_config_32(rdev
,
1098 rdev
->em_efptr
+ RIO_EM_PN_ERR_DETECT(portnum
), 0);
1101 rio_read_config_32(rdev
,
1102 rdev
->em_efptr
+ RIO_EM_LTL_ERR_DETECT
, &em_ltlerrdet
);
1104 pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n",
1106 /* Clear EM L/T Layer Error Detect CSR */
1107 rio_write_config_32(rdev
,
1108 rdev
->em_efptr
+ RIO_EM_LTL_ERR_DETECT
, 0);
1111 /* Clear remaining error bits and Port-Write Pending bit */
1112 rio_write_config_32(rdev
,
1113 rdev
->phys_efptr
+ RIO_PORT_N_ERR_STS_CSR(portnum
),
1118 EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler
);
1121 * rio_mport_get_efb - get pointer to next extended features block
1122 * @port: Master port to issue transaction
1123 * @local: Indicate a local master port or remote device access
1124 * @destid: Destination ID of the device
1125 * @hopcount: Number of switch hops to the device
1126 * @from: Offset of current Extended Feature block header (if 0 starts
1127 * from ExtFeaturePtr)
1130 rio_mport_get_efb(struct rio_mport
*port
, int local
, u16 destid
,
1131 u8 hopcount
, u32 from
)
1137 rio_local_read_config_32(port
, RIO_ASM_INFO_CAR
,
1140 rio_mport_read_config_32(port
, destid
, hopcount
,
1141 RIO_ASM_INFO_CAR
, ®_val
);
1142 return reg_val
& RIO_EXT_FTR_PTR_MASK
;
1145 rio_local_read_config_32(port
, from
, ®_val
);
1147 rio_mport_read_config_32(port
, destid
, hopcount
,
1149 return RIO_GET_BLOCK_ID(reg_val
);
1152 EXPORT_SYMBOL_GPL(rio_mport_get_efb
);
1155 * rio_mport_get_feature - query for devices' extended features
1156 * @port: Master port to issue transaction
1157 * @local: Indicate a local master port or remote device access
1158 * @destid: Destination ID of the device
1159 * @hopcount: Number of switch hops to the device
1160 * @ftr: Extended feature code
1162 * Tell if a device supports a given RapidIO capability.
1163 * Returns the offset of the requested extended feature
1164 * block within the device's RIO configuration space or
1165 * 0 in case the device does not support it. Possible
1168 * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices
1170 * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices
1172 * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices
1174 * %RIO_EFB_SER_EP_ID LP/Serial EP Devices
1176 * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices
1178 * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices
1181 rio_mport_get_feature(struct rio_mport
* port
, int local
, u16 destid
,
1182 u8 hopcount
, int ftr
)
1184 u32 asm_info
, ext_ftr_ptr
, ftr_header
;
1187 rio_local_read_config_32(port
, RIO_ASM_INFO_CAR
, &asm_info
);
1189 rio_mport_read_config_32(port
, destid
, hopcount
,
1190 RIO_ASM_INFO_CAR
, &asm_info
);
1192 ext_ftr_ptr
= asm_info
& RIO_EXT_FTR_PTR_MASK
;
1194 while (ext_ftr_ptr
) {
1196 rio_local_read_config_32(port
, ext_ftr_ptr
,
1199 rio_mport_read_config_32(port
, destid
, hopcount
,
1200 ext_ftr_ptr
, &ftr_header
);
1201 if (RIO_GET_BLOCK_ID(ftr_header
) == ftr
)
1203 if (!(ext_ftr_ptr
= RIO_GET_BLOCK_PTR(ftr_header
)))
1209 EXPORT_SYMBOL_GPL(rio_mport_get_feature
);
1212 * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did
1213 * @vid: RIO vid to match or %RIO_ANY_ID to match all vids
1214 * @did: RIO did to match or %RIO_ANY_ID to match all dids
1215 * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids
1216 * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids
1217 * @from: Previous RIO device found in search, or %NULL for new search
1219 * Iterates through the list of known RIO devices. If a RIO device is
1220 * found with a matching @vid, @did, @asm_vid, @asm_did, the reference
1221 * count to the device is incrememted and a pointer to its device
1222 * structure is returned. Otherwise, %NULL is returned. A new search
1223 * is initiated by passing %NULL to the @from argument. Otherwise, if
1224 * @from is not %NULL, searches continue from next device on the global
1225 * list. The reference count for @from is always decremented if it is
1228 struct rio_dev
*rio_get_asm(u16 vid
, u16 did
,
1229 u16 asm_vid
, u16 asm_did
, struct rio_dev
*from
)
1231 struct list_head
*n
;
1232 struct rio_dev
*rdev
;
1234 WARN_ON(in_interrupt());
1235 spin_lock(&rio_global_list_lock
);
1236 n
= from
? from
->global_list
.next
: rio_devices
.next
;
1238 while (n
&& (n
!= &rio_devices
)) {
1239 rdev
= rio_dev_g(n
);
1240 if ((vid
== RIO_ANY_ID
|| rdev
->vid
== vid
) &&
1241 (did
== RIO_ANY_ID
|| rdev
->did
== did
) &&
1242 (asm_vid
== RIO_ANY_ID
|| rdev
->asm_vid
== asm_vid
) &&
1243 (asm_did
== RIO_ANY_ID
|| rdev
->asm_did
== asm_did
))
1250 rdev
= rio_dev_get(rdev
);
1251 spin_unlock(&rio_global_list_lock
);
1256 * rio_get_device - Begin or continue searching for a RIO device by vid/did
1257 * @vid: RIO vid to match or %RIO_ANY_ID to match all vids
1258 * @did: RIO did to match or %RIO_ANY_ID to match all dids
1259 * @from: Previous RIO device found in search, or %NULL for new search
1261 * Iterates through the list of known RIO devices. If a RIO device is
1262 * found with a matching @vid and @did, the reference count to the
1263 * device is incrememted and a pointer to its device structure is returned.
1264 * Otherwise, %NULL is returned. A new search is initiated by passing %NULL
1265 * to the @from argument. Otherwise, if @from is not %NULL, searches
1266 * continue from next device on the global list. The reference count for
1267 * @from is always decremented if it is not %NULL.
1269 struct rio_dev
*rio_get_device(u16 vid
, u16 did
, struct rio_dev
*from
)
1271 return rio_get_asm(vid
, did
, RIO_ANY_ID
, RIO_ANY_ID
, from
);
1275 * rio_std_route_add_entry - Add switch route table entry using standard
1276 * registers defined in RIO specification rev.1.3
1277 * @mport: Master port to issue transaction
1278 * @destid: Destination ID of the device
1279 * @hopcount: Number of switch hops to the device
1280 * @table: routing table ID (global or port-specific)
1281 * @route_destid: destID entry in the RT
1282 * @route_port: destination port for specified destID
1285 rio_std_route_add_entry(struct rio_mport
*mport
, u16 destid
, u8 hopcount
,
1286 u16 table
, u16 route_destid
, u8 route_port
)
1288 if (table
== RIO_GLOBAL_TABLE
) {
1289 rio_mport_write_config_32(mport
, destid
, hopcount
,
1290 RIO_STD_RTE_CONF_DESTID_SEL_CSR
,
1292 rio_mport_write_config_32(mport
, destid
, hopcount
,
1293 RIO_STD_RTE_CONF_PORT_SEL_CSR
,
1302 * rio_std_route_get_entry - Read switch route table entry (port number)
1303 * associated with specified destID using standard registers defined in RIO
1304 * specification rev.1.3
1305 * @mport: Master port to issue transaction
1306 * @destid: Destination ID of the device
1307 * @hopcount: Number of switch hops to the device
1308 * @table: routing table ID (global or port-specific)
1309 * @route_destid: destID entry in the RT
1310 * @route_port: returned destination port for specified destID
1313 rio_std_route_get_entry(struct rio_mport
*mport
, u16 destid
, u8 hopcount
,
1314 u16 table
, u16 route_destid
, u8
*route_port
)
1318 if (table
== RIO_GLOBAL_TABLE
) {
1319 rio_mport_write_config_32(mport
, destid
, hopcount
,
1320 RIO_STD_RTE_CONF_DESTID_SEL_CSR
, route_destid
);
1321 rio_mport_read_config_32(mport
, destid
, hopcount
,
1322 RIO_STD_RTE_CONF_PORT_SEL_CSR
, &result
);
1324 *route_port
= (u8
)result
;
1331 * rio_std_route_clr_table - Clear swotch route table using standard registers
1332 * defined in RIO specification rev.1.3.
1333 * @mport: Master port to issue transaction
1334 * @destid: Destination ID of the device
1335 * @hopcount: Number of switch hops to the device
1336 * @table: routing table ID (global or port-specific)
1339 rio_std_route_clr_table(struct rio_mport
*mport
, u16 destid
, u8 hopcount
,
1342 u32 max_destid
= 0xff;
1343 u32 i
, pef
, id_inc
= 1, ext_cfg
= 0;
1344 u32 port_sel
= RIO_INVALID_ROUTE
;
1346 if (table
== RIO_GLOBAL_TABLE
) {
1347 rio_mport_read_config_32(mport
, destid
, hopcount
,
1350 if (mport
->sys_size
) {
1351 rio_mport_read_config_32(mport
, destid
, hopcount
,
1352 RIO_SWITCH_RT_LIMIT
,
1354 max_destid
&= RIO_RT_MAX_DESTID
;
1357 if (pef
& RIO_PEF_EXT_RT
) {
1358 ext_cfg
= 0x80000000;
1360 port_sel
= (RIO_INVALID_ROUTE
<< 24) |
1361 (RIO_INVALID_ROUTE
<< 16) |
1362 (RIO_INVALID_ROUTE
<< 8) |
1366 for (i
= 0; i
<= max_destid
;) {
1367 rio_mport_write_config_32(mport
, destid
, hopcount
,
1368 RIO_STD_RTE_CONF_DESTID_SEL_CSR
,
1370 rio_mport_write_config_32(mport
, destid
, hopcount
,
1371 RIO_STD_RTE_CONF_PORT_SEL_CSR
,
1382 * rio_lock_device - Acquires host device lock for specified device
1383 * @port: Master port to send transaction
1384 * @destid: Destination ID for device/switch
1385 * @hopcount: Hopcount to reach switch
1386 * @wait_ms: Max wait time in msec (0 = no timeout)
1388 * Attepts to acquire host device lock for specified device
1389 * Returns 0 if device lock acquired or EINVAL if timeout expires.
1391 int rio_lock_device(struct rio_mport
*port
, u16 destid
,
1392 u8 hopcount
, int wait_ms
)
1397 /* Attempt to acquire device lock */
1398 rio_mport_write_config_32(port
, destid
, hopcount
,
1399 RIO_HOST_DID_LOCK_CSR
, port
->host_deviceid
);
1400 rio_mport_read_config_32(port
, destid
, hopcount
,
1401 RIO_HOST_DID_LOCK_CSR
, &result
);
1403 while (result
!= port
->host_deviceid
) {
1404 if (wait_ms
!= 0 && tcnt
== wait_ms
) {
1405 pr_debug("RIO: timeout when locking device %x:%x\n",
1413 /* Try to acquire device lock again */
1414 rio_mport_write_config_32(port
, destid
,
1416 RIO_HOST_DID_LOCK_CSR
,
1417 port
->host_deviceid
);
1418 rio_mport_read_config_32(port
, destid
,
1420 RIO_HOST_DID_LOCK_CSR
, &result
);
1425 EXPORT_SYMBOL_GPL(rio_lock_device
);
1428 * rio_unlock_device - Releases host device lock for specified device
1429 * @port: Master port to send transaction
1430 * @destid: Destination ID for device/switch
1431 * @hopcount: Hopcount to reach switch
1433 * Returns 0 if device lock released or EINVAL if fails.
1435 int rio_unlock_device(struct rio_mport
*port
, u16 destid
, u8 hopcount
)
1439 /* Release device lock */
1440 rio_mport_write_config_32(port
, destid
,
1442 RIO_HOST_DID_LOCK_CSR
,
1443 port
->host_deviceid
);
1444 rio_mport_read_config_32(port
, destid
, hopcount
,
1445 RIO_HOST_DID_LOCK_CSR
, &result
);
1446 if ((result
& 0xffff) != 0xffff) {
1447 pr_debug("RIO: badness when releasing device lock %x:%x\n",
1454 EXPORT_SYMBOL_GPL(rio_unlock_device
);
1457 * rio_route_add_entry- Add a route entry to a switch routing table
1459 * @table: Routing table ID
1460 * @route_destid: Destination ID to be routed
1461 * @route_port: Port number to be routed
1462 * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock)
1464 * If available calls the switch specific add_entry() method to add a route
1465 * entry into a switch routing table. Otherwise uses standard RT update method
1466 * as defined by RapidIO specification. A specific routing table can be selected
1467 * using the @table argument if a switch has per port routing tables or
1468 * the standard (or global) table may be used by passing
1469 * %RIO_GLOBAL_TABLE in @table.
1471 * Returns %0 on success or %-EINVAL on failure.
1473 int rio_route_add_entry(struct rio_dev
*rdev
,
1474 u16 table
, u16 route_destid
, u8 route_port
, int lock
)
1477 struct rio_switch_ops
*ops
= rdev
->rswitch
->ops
;
1480 rc
= rio_lock_device(rdev
->net
->hport
, rdev
->destid
,
1481 rdev
->hopcount
, 1000);
1486 spin_lock(&rdev
->rswitch
->lock
);
1488 if (ops
== NULL
|| ops
->add_entry
== NULL
) {
1489 rc
= rio_std_route_add_entry(rdev
->net
->hport
, rdev
->destid
,
1490 rdev
->hopcount
, table
,
1491 route_destid
, route_port
);
1492 } else if (try_module_get(ops
->owner
)) {
1493 rc
= ops
->add_entry(rdev
->net
->hport
, rdev
->destid
,
1494 rdev
->hopcount
, table
, route_destid
,
1496 module_put(ops
->owner
);
1499 spin_unlock(&rdev
->rswitch
->lock
);
1502 rio_unlock_device(rdev
->net
->hport
, rdev
->destid
,
1507 EXPORT_SYMBOL_GPL(rio_route_add_entry
);
1510 * rio_route_get_entry- Read an entry from a switch routing table
1512 * @table: Routing table ID
1513 * @route_destid: Destination ID to be routed
1514 * @route_port: Pointer to read port number into
1515 * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock)
1517 * If available calls the switch specific get_entry() method to fetch a route
1518 * entry from a switch routing table. Otherwise uses standard RT read method
1519 * as defined by RapidIO specification. A specific routing table can be selected
1520 * using the @table argument if a switch has per port routing tables or
1521 * the standard (or global) table may be used by passing
1522 * %RIO_GLOBAL_TABLE in @table.
1524 * Returns %0 on success or %-EINVAL on failure.
1526 int rio_route_get_entry(struct rio_dev
*rdev
, u16 table
,
1527 u16 route_destid
, u8
*route_port
, int lock
)
1530 struct rio_switch_ops
*ops
= rdev
->rswitch
->ops
;
1533 rc
= rio_lock_device(rdev
->net
->hport
, rdev
->destid
,
1534 rdev
->hopcount
, 1000);
1539 spin_lock(&rdev
->rswitch
->lock
);
1541 if (ops
== NULL
|| ops
->get_entry
== NULL
) {
1542 rc
= rio_std_route_get_entry(rdev
->net
->hport
, rdev
->destid
,
1543 rdev
->hopcount
, table
,
1544 route_destid
, route_port
);
1545 } else if (try_module_get(ops
->owner
)) {
1546 rc
= ops
->get_entry(rdev
->net
->hport
, rdev
->destid
,
1547 rdev
->hopcount
, table
, route_destid
,
1549 module_put(ops
->owner
);
1552 spin_unlock(&rdev
->rswitch
->lock
);
1555 rio_unlock_device(rdev
->net
->hport
, rdev
->destid
,
1559 EXPORT_SYMBOL_GPL(rio_route_get_entry
);
1562 * rio_route_clr_table - Clear a switch routing table
1564 * @table: Routing table ID
1565 * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock)
1567 * If available calls the switch specific clr_table() method to clear a switch
1568 * routing table. Otherwise uses standard RT write method as defined by RapidIO
1569 * specification. A specific routing table can be selected using the @table
1570 * argument if a switch has per port routing tables or the standard (or global)
1571 * table may be used by passing %RIO_GLOBAL_TABLE in @table.
1573 * Returns %0 on success or %-EINVAL on failure.
1575 int rio_route_clr_table(struct rio_dev
*rdev
, u16 table
, int lock
)
1578 struct rio_switch_ops
*ops
= rdev
->rswitch
->ops
;
1581 rc
= rio_lock_device(rdev
->net
->hport
, rdev
->destid
,
1582 rdev
->hopcount
, 1000);
1587 spin_lock(&rdev
->rswitch
->lock
);
1589 if (ops
== NULL
|| ops
->clr_table
== NULL
) {
1590 rc
= rio_std_route_clr_table(rdev
->net
->hport
, rdev
->destid
,
1591 rdev
->hopcount
, table
);
1592 } else if (try_module_get(ops
->owner
)) {
1593 rc
= ops
->clr_table(rdev
->net
->hport
, rdev
->destid
,
1594 rdev
->hopcount
, table
);
1596 module_put(ops
->owner
);
1599 spin_unlock(&rdev
->rswitch
->lock
);
1602 rio_unlock_device(rdev
->net
->hport
, rdev
->destid
,
1607 EXPORT_SYMBOL_GPL(rio_route_clr_table
);
1609 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
1611 static bool rio_chan_filter(struct dma_chan
*chan
, void *arg
)
1613 struct rio_mport
*mport
= arg
;
1615 /* Check that DMA device belongs to the right MPORT */
1616 return mport
== container_of(chan
->device
, struct rio_mport
, dma
);
1620 * rio_request_mport_dma - request RapidIO capable DMA channel associated
1621 * with specified local RapidIO mport device.
1622 * @mport: RIO mport to perform DMA data transfers
1624 * Returns pointer to allocated DMA channel or NULL if failed.
1626 struct dma_chan
*rio_request_mport_dma(struct rio_mport
*mport
)
1628 dma_cap_mask_t mask
;
1631 dma_cap_set(DMA_SLAVE
, mask
);
1632 return dma_request_channel(mask
, rio_chan_filter
, mport
);
1634 EXPORT_SYMBOL_GPL(rio_request_mport_dma
);
1637 * rio_request_dma - request RapidIO capable DMA channel that supports
1638 * specified target RapidIO device.
1639 * @rdev: RIO device associated with DMA transfer
1641 * Returns pointer to allocated DMA channel or NULL if failed.
1643 struct dma_chan
*rio_request_dma(struct rio_dev
*rdev
)
1645 return rio_request_mport_dma(rdev
->net
->hport
);
1647 EXPORT_SYMBOL_GPL(rio_request_dma
);
1650 * rio_release_dma - release specified DMA channel
1651 * @dchan: DMA channel to release
1653 void rio_release_dma(struct dma_chan
*dchan
)
1655 dma_release_channel(dchan
);
1657 EXPORT_SYMBOL_GPL(rio_release_dma
);
1660 * rio_dma_prep_xfer - RapidIO specific wrapper
1661 * for device_prep_slave_sg callback defined by DMAENGINE.
1662 * @dchan: DMA channel to configure
1663 * @destid: target RapidIO device destination ID
1664 * @data: RIO specific data descriptor
1665 * @direction: DMA data transfer direction (TO or FROM the device)
1666 * @flags: dmaengine defined flags
1668 * Initializes RapidIO capable DMA channel for the specified data transfer.
1669 * Uses DMA channel private extension to pass information related to remote
1670 * target RIO device.
1671 * Returns pointer to DMA transaction descriptor or NULL if failed.
1673 struct dma_async_tx_descriptor
*rio_dma_prep_xfer(struct dma_chan
*dchan
,
1674 u16 destid
, struct rio_dma_data
*data
,
1675 enum dma_transfer_direction direction
, unsigned long flags
)
1677 struct rio_dma_ext rio_ext
;
1679 if (dchan
->device
->device_prep_slave_sg
== NULL
) {
1680 pr_err("%s: prep_rio_sg == NULL\n", __func__
);
1684 rio_ext
.destid
= destid
;
1685 rio_ext
.rio_addr_u
= data
->rio_addr_u
;
1686 rio_ext
.rio_addr
= data
->rio_addr
;
1687 rio_ext
.wr_type
= data
->wr_type
;
1689 return dmaengine_prep_rio_sg(dchan
, data
->sg
, data
->sg_len
,
1690 direction
, flags
, &rio_ext
);
1692 EXPORT_SYMBOL_GPL(rio_dma_prep_xfer
);
1695 * rio_dma_prep_slave_sg - RapidIO specific wrapper
1696 * for device_prep_slave_sg callback defined by DMAENGINE.
1697 * @rdev: RIO device control structure
1698 * @dchan: DMA channel to configure
1699 * @data: RIO specific data descriptor
1700 * @direction: DMA data transfer direction (TO or FROM the device)
1701 * @flags: dmaengine defined flags
1703 * Initializes RapidIO capable DMA channel for the specified data transfer.
1704 * Uses DMA channel private extension to pass information related to remote
1705 * target RIO device.
1706 * Returns pointer to DMA transaction descriptor or NULL if failed.
1708 struct dma_async_tx_descriptor
*rio_dma_prep_slave_sg(struct rio_dev
*rdev
,
1709 struct dma_chan
*dchan
, struct rio_dma_data
*data
,
1710 enum dma_transfer_direction direction
, unsigned long flags
)
1712 return rio_dma_prep_xfer(dchan
, rdev
->destid
, data
, direction
, flags
);
1714 EXPORT_SYMBOL_GPL(rio_dma_prep_slave_sg
);
1716 #endif /* CONFIG_RAPIDIO_DMA_ENGINE */
1719 * rio_find_mport - find RIO mport by its ID
1720 * @mport_id: number (ID) of mport device
1722 * Given a RIO mport number, the desired mport is located
1723 * in the global list of mports. If the mport is found, a pointer to its
1724 * data structure is returned. If no mport is found, %NULL is returned.
1726 struct rio_mport
*rio_find_mport(int mport_id
)
1728 struct rio_mport
*port
;
1730 mutex_lock(&rio_mport_list_lock
);
1731 list_for_each_entry(port
, &rio_mports
, node
) {
1732 if (port
->id
== mport_id
)
1737 mutex_unlock(&rio_mport_list_lock
);
1743 * rio_register_scan - enumeration/discovery method registration interface
1744 * @mport_id: mport device ID for which fabric scan routine has to be set
1745 * (RIO_MPORT_ANY = set for all available mports)
1746 * @scan_ops: enumeration/discovery operations structure
1748 * Registers enumeration/discovery operations with RapidIO subsystem and
1749 * attaches it to the specified mport device (or all available mports
1750 * if RIO_MPORT_ANY is specified).
1752 * Returns error if the mport already has an enumerator attached to it.
1753 * In case of RIO_MPORT_ANY skips mports with valid scan routines (no error).
1755 int rio_register_scan(int mport_id
, struct rio_scan
*scan_ops
)
1757 struct rio_mport
*port
;
1758 struct rio_scan_node
*scan
;
1761 pr_debug("RIO: %s for mport_id=%d\n", __func__
, mport_id
);
1763 if ((mport_id
!= RIO_MPORT_ANY
&& mport_id
>= RIO_MAX_MPORTS
) ||
1767 mutex_lock(&rio_mport_list_lock
);
1770 * Check if there is another enumerator already registered for
1771 * the same mport ID (including RIO_MPORT_ANY). Multiple enumerators
1772 * for the same mport ID are not supported.
1774 list_for_each_entry(scan
, &rio_scans
, node
) {
1775 if (scan
->mport_id
== mport_id
) {
1782 * Allocate and initialize new scan registration node.
1784 scan
= kzalloc(sizeof(*scan
), GFP_KERNEL
);
1790 scan
->mport_id
= mport_id
;
1791 scan
->ops
= scan_ops
;
1794 * Traverse the list of registered mports to attach this new scan.
1796 * The new scan with matching mport ID overrides any previously attached
1797 * scan assuming that old scan (if any) is the default one (based on the
1798 * enumerator registration check above).
1799 * If the new scan is the global one, it will be attached only to mports
1800 * that do not have their own individual operations already attached.
1802 list_for_each_entry(port
, &rio_mports
, node
) {
1803 if (port
->id
== mport_id
) {
1804 port
->nscan
= scan_ops
;
1806 } else if (mport_id
== RIO_MPORT_ANY
&& !port
->nscan
)
1807 port
->nscan
= scan_ops
;
1810 list_add_tail(&scan
->node
, &rio_scans
);
1813 mutex_unlock(&rio_mport_list_lock
);
1817 EXPORT_SYMBOL_GPL(rio_register_scan
);
1820 * rio_unregister_scan - removes enumeration/discovery method from mport
1821 * @mport_id: mport device ID for which fabric scan routine has to be
1822 * unregistered (RIO_MPORT_ANY = apply to all mports that use
1823 * the specified scan_ops)
1824 * @scan_ops: enumeration/discovery operations structure
1826 * Removes enumeration or discovery method assigned to the specified mport
1827 * device. If RIO_MPORT_ANY is specified, removes the specified operations from
1828 * all mports that have them attached.
1830 int rio_unregister_scan(int mport_id
, struct rio_scan
*scan_ops
)
1832 struct rio_mport
*port
;
1833 struct rio_scan_node
*scan
;
1835 pr_debug("RIO: %s for mport_id=%d\n", __func__
, mport_id
);
1837 if (mport_id
!= RIO_MPORT_ANY
&& mport_id
>= RIO_MAX_MPORTS
)
1840 mutex_lock(&rio_mport_list_lock
);
1842 list_for_each_entry(port
, &rio_mports
, node
)
1843 if (port
->id
== mport_id
||
1844 (mport_id
== RIO_MPORT_ANY
&& port
->nscan
== scan_ops
))
1847 list_for_each_entry(scan
, &rio_scans
, node
) {
1848 if (scan
->mport_id
== mport_id
) {
1849 list_del(&scan
->node
);
1855 mutex_unlock(&rio_mport_list_lock
);
1859 EXPORT_SYMBOL_GPL(rio_unregister_scan
);
1862 * rio_mport_scan - execute enumeration/discovery on the specified mport
1863 * @mport_id: number (ID) of mport device
1865 int rio_mport_scan(int mport_id
)
1867 struct rio_mport
*port
= NULL
;
1870 mutex_lock(&rio_mport_list_lock
);
1871 list_for_each_entry(port
, &rio_mports
, node
) {
1872 if (port
->id
== mport_id
)
1875 mutex_unlock(&rio_mport_list_lock
);
1879 mutex_unlock(&rio_mport_list_lock
);
1883 if (!try_module_get(port
->nscan
->owner
)) {
1884 mutex_unlock(&rio_mport_list_lock
);
1888 mutex_unlock(&rio_mport_list_lock
);
1890 if (port
->host_deviceid
>= 0)
1891 rc
= port
->nscan
->enumerate(port
, 0);
1893 rc
= port
->nscan
->discover(port
, RIO_SCAN_ENUM_NO_WAIT
);
1895 module_put(port
->nscan
->owner
);
1899 static void rio_fixup_device(struct rio_dev
*dev
)
1903 static int rio_init(void)
1905 struct rio_dev
*dev
= NULL
;
1907 while ((dev
= rio_get_device(RIO_ANY_ID
, RIO_ANY_ID
, dev
)) != NULL
) {
1908 rio_fixup_device(dev
);
1913 static struct workqueue_struct
*rio_wq
;
1915 struct rio_disc_work
{
1916 struct work_struct work
;
1917 struct rio_mport
*mport
;
1920 static void disc_work_handler(struct work_struct
*_work
)
1922 struct rio_disc_work
*work
;
1924 work
= container_of(_work
, struct rio_disc_work
, work
);
1925 pr_debug("RIO: discovery work for mport %d %s\n",
1926 work
->mport
->id
, work
->mport
->name
);
1927 if (try_module_get(work
->mport
->nscan
->owner
)) {
1928 work
->mport
->nscan
->discover(work
->mport
, 0);
1929 module_put(work
->mport
->nscan
->owner
);
1933 int rio_init_mports(void)
1935 struct rio_mport
*port
;
1936 struct rio_disc_work
*work
;
1943 * First, run enumerations and check if we need to perform discovery
1944 * on any of the registered mports.
1946 mutex_lock(&rio_mport_list_lock
);
1947 list_for_each_entry(port
, &rio_mports
, node
) {
1948 if (port
->host_deviceid
>= 0) {
1949 if (port
->nscan
&& try_module_get(port
->nscan
->owner
)) {
1950 port
->nscan
->enumerate(port
, 0);
1951 module_put(port
->nscan
->owner
);
1956 mutex_unlock(&rio_mport_list_lock
);
1962 * If we have mports that require discovery schedule a discovery work
1963 * for each of them. If the code below fails to allocate needed
1964 * resources, exit without error to keep results of enumeration
1966 * TODO: Implement restart of discovery process for all or
1967 * individual discovering mports.
1969 rio_wq
= alloc_workqueue("riodisc", 0, 0);
1971 pr_err("RIO: unable allocate rio_wq\n");
1975 work
= kcalloc(n
, sizeof *work
, GFP_KERNEL
);
1977 pr_err("RIO: no memory for work struct\n");
1978 destroy_workqueue(rio_wq
);
1983 mutex_lock(&rio_mport_list_lock
);
1984 list_for_each_entry(port
, &rio_mports
, node
) {
1985 if (port
->host_deviceid
< 0 && port
->nscan
) {
1986 work
[n
].mport
= port
;
1987 INIT_WORK(&work
[n
].work
, disc_work_handler
);
1988 queue_work(rio_wq
, &work
[n
].work
);
1993 flush_workqueue(rio_wq
);
1994 mutex_unlock(&rio_mport_list_lock
);
1995 pr_debug("RIO: destroy discovery workqueue\n");
1996 destroy_workqueue(rio_wq
);
2005 static int rio_get_hdid(int index
)
2007 if (ids_num
== 0 || ids_num
<= index
|| index
>= RIO_MAX_MPORTS
)
2013 int rio_register_mport(struct rio_mport
*port
)
2015 struct rio_scan_node
*scan
= NULL
;
2018 if (next_portid
>= RIO_MAX_MPORTS
) {
2019 pr_err("RIO: reached specified max number of mports\n");
2023 port
->id
= next_portid
++;
2024 port
->host_deviceid
= rio_get_hdid(port
->id
);
2027 dev_set_name(&port
->dev
, "rapidio%d", port
->id
);
2028 port
->dev
.class = &rio_mport_class
;
2030 res
= device_register(&port
->dev
);
2032 dev_err(&port
->dev
, "RIO: mport%d registration failed ERR=%d\n",
2035 dev_dbg(&port
->dev
, "RIO: mport%d registered\n", port
->id
);
2037 mutex_lock(&rio_mport_list_lock
);
2038 list_add_tail(&port
->node
, &rio_mports
);
2041 * Check if there are any registered enumeration/discovery operations
2042 * that have to be attached to the added mport.
2044 list_for_each_entry(scan
, &rio_scans
, node
) {
2045 if (port
->id
== scan
->mport_id
||
2046 scan
->mport_id
== RIO_MPORT_ANY
) {
2047 port
->nscan
= scan
->ops
;
2048 if (port
->id
== scan
->mport_id
)
2052 mutex_unlock(&rio_mport_list_lock
);
2054 pr_debug("RIO: %s %s id=%d\n", __func__
, port
->name
, port
->id
);
2057 EXPORT_SYMBOL_GPL(rio_register_mport
);
2059 EXPORT_SYMBOL_GPL(rio_local_get_device_id
);
2060 EXPORT_SYMBOL_GPL(rio_get_device
);
2061 EXPORT_SYMBOL_GPL(rio_get_asm
);
2062 EXPORT_SYMBOL_GPL(rio_request_inb_dbell
);
2063 EXPORT_SYMBOL_GPL(rio_release_inb_dbell
);
2064 EXPORT_SYMBOL_GPL(rio_request_outb_dbell
);
2065 EXPORT_SYMBOL_GPL(rio_release_outb_dbell
);
2066 EXPORT_SYMBOL_GPL(rio_request_inb_mbox
);
2067 EXPORT_SYMBOL_GPL(rio_release_inb_mbox
);
2068 EXPORT_SYMBOL_GPL(rio_request_outb_mbox
);
2069 EXPORT_SYMBOL_GPL(rio_release_outb_mbox
);
2070 EXPORT_SYMBOL_GPL(rio_init_mports
);