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 mutex_lock(&mport
->lock
);
366 list_add_tail(&dbell
->node
, &mport
->dbells
);
367 mutex_unlock(&mport
->lock
);
374 * rio_request_inb_dbell - request inbound doorbell message service
375 * @mport: RIO master port from which to allocate the doorbell resource
376 * @dev_id: Device specific pointer to pass on event
377 * @start: Doorbell info range start
378 * @end: Doorbell info range end
379 * @dinb: Callback to execute when doorbell is received
381 * Requests ownership of an inbound doorbell resource and binds
382 * a callback function to the resource. Returns 0 if the request
383 * has been satisfied.
385 int rio_request_inb_dbell(struct rio_mport
*mport
,
389 void (*dinb
) (struct rio_mport
* mport
, void *dev_id
, u16 src
,
394 struct resource
*res
= kzalloc(sizeof(struct resource
), GFP_KERNEL
);
397 rio_init_dbell_res(res
, start
, end
);
399 /* Make sure these doorbells aren't in use */
401 request_resource(&mport
->riores
[RIO_DOORBELL_RESOURCE
],
407 /* Hook the doorbell callback */
408 rc
= rio_setup_inb_dbell(mport
, dev_id
, res
, dinb
);
417 * rio_release_inb_dbell - release inbound doorbell message service
418 * @mport: RIO master port from which to release the doorbell resource
419 * @start: Doorbell info range start
420 * @end: Doorbell info range end
422 * Releases ownership of an inbound doorbell resource and removes
423 * callback from the doorbell event list. Returns 0 if the request
424 * has been satisfied.
426 int rio_release_inb_dbell(struct rio_mport
*mport
, u16 start
, u16 end
)
428 int rc
= 0, found
= 0;
429 struct rio_dbell
*dbell
;
431 mutex_lock(&mport
->lock
);
432 list_for_each_entry(dbell
, &mport
->dbells
, node
) {
433 if ((dbell
->res
->start
== start
) && (dbell
->res
->end
== end
)) {
434 list_del(&dbell
->node
);
439 mutex_unlock(&mport
->lock
);
441 /* If we can't find an exact match, fail */
447 /* Release the doorbell resource */
448 rc
= release_resource(dbell
->res
);
450 /* Free the doorbell event */
458 * rio_request_outb_dbell - request outbound doorbell message range
459 * @rdev: RIO device from which to allocate the doorbell resource
460 * @start: Doorbell message range start
461 * @end: Doorbell message range end
463 * Requests ownership of a doorbell message range. Returns a resource
464 * if the request has been satisfied or %NULL on failure.
466 struct resource
*rio_request_outb_dbell(struct rio_dev
*rdev
, u16 start
,
469 struct resource
*res
= kzalloc(sizeof(struct resource
), GFP_KERNEL
);
472 rio_init_dbell_res(res
, start
, end
);
474 /* Make sure these doorbells aren't in use */
475 if (request_resource(&rdev
->riores
[RIO_DOORBELL_RESOURCE
], res
)
486 * rio_release_outb_dbell - release outbound doorbell message range
487 * @rdev: RIO device from which to release the doorbell resource
488 * @res: Doorbell resource to be freed
490 * Releases ownership of a doorbell message range. Returns 0 if the
491 * request has been satisfied.
493 int rio_release_outb_dbell(struct rio_dev
*rdev
, struct resource
*res
)
495 int rc
= release_resource(res
);
503 * rio_request_inb_pwrite - request inbound port-write message service
504 * @rdev: RIO device to which register inbound port-write callback routine
505 * @pwcback: Callback routine to execute when port-write is received
507 * Binds a port-write callback function to the RapidIO device.
508 * Returns 0 if the request has been satisfied.
510 int rio_request_inb_pwrite(struct rio_dev
*rdev
,
511 int (*pwcback
)(struct rio_dev
*rdev
, union rio_pw_msg
*msg
, int step
))
515 spin_lock(&rio_global_list_lock
);
516 if (rdev
->pwcback
!= NULL
)
519 rdev
->pwcback
= pwcback
;
521 spin_unlock(&rio_global_list_lock
);
524 EXPORT_SYMBOL_GPL(rio_request_inb_pwrite
);
527 * rio_release_inb_pwrite - release inbound port-write message service
528 * @rdev: RIO device which registered for inbound port-write callback
530 * Removes callback from the rio_dev structure. Returns 0 if the request
531 * has been satisfied.
533 int rio_release_inb_pwrite(struct rio_dev
*rdev
)
537 spin_lock(&rio_global_list_lock
);
539 rdev
->pwcback
= NULL
;
543 spin_unlock(&rio_global_list_lock
);
546 EXPORT_SYMBOL_GPL(rio_release_inb_pwrite
);
549 * rio_map_inb_region -- Map inbound memory region.
550 * @mport: Master port.
551 * @local: physical address of memory region to be mapped
552 * @rbase: RIO base address assigned to this window
553 * @size: Size of the memory region
554 * @rflags: Flags for mapping.
556 * Return: 0 -- Success.
558 * This function will create the mapping from RIO space to local memory.
560 int rio_map_inb_region(struct rio_mport
*mport
, dma_addr_t local
,
561 u64 rbase
, u32 size
, u32 rflags
)
566 if (!mport
->ops
->map_inb
)
568 spin_lock_irqsave(&rio_mmap_lock
, flags
);
569 rc
= mport
->ops
->map_inb(mport
, local
, rbase
, size
, rflags
);
570 spin_unlock_irqrestore(&rio_mmap_lock
, flags
);
573 EXPORT_SYMBOL_GPL(rio_map_inb_region
);
576 * rio_unmap_inb_region -- Unmap the inbound memory region
577 * @mport: Master port
578 * @lstart: physical address of memory region to be unmapped
580 void rio_unmap_inb_region(struct rio_mport
*mport
, dma_addr_t lstart
)
583 if (!mport
->ops
->unmap_inb
)
585 spin_lock_irqsave(&rio_mmap_lock
, flags
);
586 mport
->ops
->unmap_inb(mport
, lstart
);
587 spin_unlock_irqrestore(&rio_mmap_lock
, flags
);
589 EXPORT_SYMBOL_GPL(rio_unmap_inb_region
);
592 * rio_mport_get_physefb - Helper function that returns register offset
593 * for Physical Layer Extended Features Block.
594 * @port: Master port to issue transaction
595 * @local: Indicate a local master port or remote device access
596 * @destid: Destination ID of the device
597 * @hopcount: Number of switch hops to the device
600 rio_mport_get_physefb(struct rio_mport
*port
, int local
,
601 u16 destid
, u8 hopcount
)
606 ext_ftr_ptr
= rio_mport_get_efb(port
, local
, destid
, hopcount
, 0);
608 while (ext_ftr_ptr
) {
610 rio_local_read_config_32(port
, ext_ftr_ptr
,
613 rio_mport_read_config_32(port
, destid
, hopcount
,
614 ext_ftr_ptr
, &ftr_header
);
616 ftr_header
= RIO_GET_BLOCK_ID(ftr_header
);
617 switch (ftr_header
) {
619 case RIO_EFB_SER_EP_ID_V13P
:
620 case RIO_EFB_SER_EP_REC_ID_V13P
:
621 case RIO_EFB_SER_EP_FREE_ID_V13P
:
622 case RIO_EFB_SER_EP_ID
:
623 case RIO_EFB_SER_EP_REC_ID
:
624 case RIO_EFB_SER_EP_FREE_ID
:
625 case RIO_EFB_SER_EP_FREC_ID
:
633 ext_ftr_ptr
= rio_mport_get_efb(port
, local
, destid
,
634 hopcount
, ext_ftr_ptr
);
639 EXPORT_SYMBOL_GPL(rio_mport_get_physefb
);
642 * rio_get_comptag - Begin or continue searching for a RIO device by component tag
643 * @comp_tag: RIO component tag to match
644 * @from: Previous RIO device found in search, or %NULL for new search
646 * Iterates through the list of known RIO devices. If a RIO device is
647 * found with a matching @comp_tag, a pointer to its device
648 * structure is returned. Otherwise, %NULL is returned. A new search
649 * is initiated by passing %NULL to the @from argument. Otherwise, if
650 * @from is not %NULL, searches continue from next device on the global
653 struct rio_dev
*rio_get_comptag(u32 comp_tag
, struct rio_dev
*from
)
656 struct rio_dev
*rdev
;
658 spin_lock(&rio_global_list_lock
);
659 n
= from
? from
->global_list
.next
: rio_devices
.next
;
661 while (n
&& (n
!= &rio_devices
)) {
663 if (rdev
->comp_tag
== comp_tag
)
669 spin_unlock(&rio_global_list_lock
);
672 EXPORT_SYMBOL_GPL(rio_get_comptag
);
675 * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port.
676 * @rdev: Pointer to RIO device control structure
677 * @pnum: Switch port number to set LOCKOUT bit
678 * @lock: Operation : set (=1) or clear (=0)
680 int rio_set_port_lockout(struct rio_dev
*rdev
, u32 pnum
, int lock
)
684 rio_read_config_32(rdev
,
685 rdev
->phys_efptr
+ RIO_PORT_N_CTL_CSR(pnum
),
688 regval
|= RIO_PORT_N_CTL_LOCKOUT
;
690 regval
&= ~RIO_PORT_N_CTL_LOCKOUT
;
692 rio_write_config_32(rdev
,
693 rdev
->phys_efptr
+ RIO_PORT_N_CTL_CSR(pnum
),
697 EXPORT_SYMBOL_GPL(rio_set_port_lockout
);
700 * rio_enable_rx_tx_port - enable input receiver and output transmitter of
702 * @port: Master port associated with the RIO network
703 * @local: local=1 select local port otherwise a far device is reached
704 * @destid: Destination ID of the device to check host bit
705 * @hopcount: Number of hops to reach the target
706 * @port_num: Port (-number on switch) to enable on a far end device
708 * Returns 0 or 1 from on General Control Command and Status Register
711 int rio_enable_rx_tx_port(struct rio_mport
*port
,
712 int local
, u16 destid
,
713 u8 hopcount
, u8 port_num
)
715 #ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS
720 * enable rx input tx output port
722 pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = "
723 "%d, port_num = %d)\n", local
, destid
, hopcount
, port_num
);
725 ext_ftr_ptr
= rio_mport_get_physefb(port
, local
, destid
, hopcount
);
728 rio_local_read_config_32(port
, ext_ftr_ptr
+
729 RIO_PORT_N_CTL_CSR(0),
732 if (rio_mport_read_config_32(port
, destid
, hopcount
,
733 ext_ftr_ptr
+ RIO_PORT_N_CTL_CSR(port_num
), ®val
) < 0)
737 if (regval
& RIO_PORT_N_CTL_P_TYP_SER
) {
739 regval
= regval
| RIO_PORT_N_CTL_EN_RX_SER
740 | RIO_PORT_N_CTL_EN_TX_SER
;
743 regval
= regval
| RIO_PORT_N_CTL_EN_RX_PAR
744 | RIO_PORT_N_CTL_EN_TX_PAR
;
748 rio_local_write_config_32(port
, ext_ftr_ptr
+
749 RIO_PORT_N_CTL_CSR(0), regval
);
751 if (rio_mport_write_config_32(port
, destid
, hopcount
,
752 ext_ftr_ptr
+ RIO_PORT_N_CTL_CSR(port_num
), regval
) < 0)
758 EXPORT_SYMBOL_GPL(rio_enable_rx_tx_port
);
762 * rio_chk_dev_route - Validate route to the specified device.
763 * @rdev: RIO device failed to respond
764 * @nrdev: Last active device on the route to rdev
765 * @npnum: nrdev's port number on the route to rdev
767 * Follows a route to the specified RIO device to determine the last available
768 * device (and corresponding RIO port) on the route.
771 rio_chk_dev_route(struct rio_dev
*rdev
, struct rio_dev
**nrdev
, int *npnum
)
774 int p_port
, rc
= -EIO
;
775 struct rio_dev
*prev
= NULL
;
777 /* Find switch with failed RIO link */
778 while (rdev
->prev
&& (rdev
->prev
->pef
& RIO_PEF_SWITCH
)) {
779 if (!rio_read_config_32(rdev
->prev
, RIO_DEV_ID_CAR
, &result
)) {
789 p_port
= prev
->rswitch
->route_table
[rdev
->destid
];
791 if (p_port
!= RIO_INVALID_ROUTE
) {
792 pr_debug("RIO: link failed on [%s]-P%d\n",
793 rio_name(prev
), p_port
);
798 pr_debug("RIO: failed to trace route to %s\n", rio_name(rdev
));
804 * rio_mport_chk_dev_access - Validate access to the specified device.
805 * @mport: Master port to send transactions
806 * @destid: Device destination ID in network
807 * @hopcount: Number of hops into the network
810 rio_mport_chk_dev_access(struct rio_mport
*mport
, u16 destid
, u8 hopcount
)
815 while (rio_mport_read_config_32(mport
, destid
, hopcount
,
816 RIO_DEV_ID_CAR
, &tmp
)) {
818 if (i
== RIO_MAX_CHK_RETRY
)
825 EXPORT_SYMBOL_GPL(rio_mport_chk_dev_access
);
828 * rio_chk_dev_access - Validate access to the specified device.
829 * @rdev: Pointer to RIO device control structure
831 static int rio_chk_dev_access(struct rio_dev
*rdev
)
833 return rio_mport_chk_dev_access(rdev
->net
->hport
,
834 rdev
->destid
, rdev
->hopcount
);
838 * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and
839 * returns link-response (if requested).
840 * @rdev: RIO devive to issue Input-status command
841 * @pnum: Device port number to issue the command
842 * @lnkresp: Response from a link partner
845 rio_get_input_status(struct rio_dev
*rdev
, int pnum
, u32
*lnkresp
)
851 /* Read from link maintenance response register
852 * to clear valid bit */
853 rio_read_config_32(rdev
,
854 rdev
->phys_efptr
+ RIO_PORT_N_MNT_RSP_CSR(pnum
),
859 /* Issue Input-status command */
860 rio_write_config_32(rdev
,
861 rdev
->phys_efptr
+ RIO_PORT_N_MNT_REQ_CSR(pnum
),
864 /* Exit if the response is not expected */
869 while (checkcount
--) {
871 rio_read_config_32(rdev
,
872 rdev
->phys_efptr
+ RIO_PORT_N_MNT_RSP_CSR(pnum
),
874 if (regval
& RIO_PORT_N_MNT_RSP_RVAL
) {
884 * rio_clr_err_stopped - Clears port Error-stopped states.
885 * @rdev: Pointer to RIO device control structure
886 * @pnum: Switch port number to clear errors
887 * @err_status: port error status (if 0 reads register from device)
889 static int rio_clr_err_stopped(struct rio_dev
*rdev
, u32 pnum
, u32 err_status
)
891 struct rio_dev
*nextdev
= rdev
->rswitch
->nextdev
[pnum
];
893 u32 far_ackid
, far_linkstat
, near_ackid
;
896 rio_read_config_32(rdev
,
897 rdev
->phys_efptr
+ RIO_PORT_N_ERR_STS_CSR(pnum
),
900 if (err_status
& RIO_PORT_N_ERR_STS_PW_OUT_ES
) {
901 pr_debug("RIO_EM: servicing Output Error-Stopped state\n");
903 * Send a Link-Request/Input-Status control symbol
905 if (rio_get_input_status(rdev
, pnum
, ®val
)) {
906 pr_debug("RIO_EM: Input-status response timeout\n");
910 pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n",
912 far_ackid
= (regval
& RIO_PORT_N_MNT_RSP_ASTAT
) >> 5;
913 far_linkstat
= regval
& RIO_PORT_N_MNT_RSP_LSTAT
;
914 rio_read_config_32(rdev
,
915 rdev
->phys_efptr
+ RIO_PORT_N_ACK_STS_CSR(pnum
),
917 pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum
, regval
);
918 near_ackid
= (regval
& RIO_PORT_N_ACK_INBOUND
) >> 24;
919 pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \
920 " near_ackID=0x%02x\n",
921 pnum
, far_ackid
, far_linkstat
, near_ackid
);
924 * If required, synchronize ackIDs of near and
927 if ((far_ackid
!= ((regval
& RIO_PORT_N_ACK_OUTSTAND
) >> 8)) ||
928 (far_ackid
!= (regval
& RIO_PORT_N_ACK_OUTBOUND
))) {
929 /* Align near outstanding/outbound ackIDs with
932 rio_write_config_32(rdev
,
933 rdev
->phys_efptr
+ RIO_PORT_N_ACK_STS_CSR(pnum
),
935 (far_ackid
<< 8) | far_ackid
);
936 /* Align far outstanding/outbound ackIDs with
941 rio_write_config_32(nextdev
,
942 nextdev
->phys_efptr
+
943 RIO_PORT_N_ACK_STS_CSR(RIO_GET_PORT_NUM(nextdev
->swpinfo
)),
945 (near_ackid
<< 8) | near_ackid
);
947 pr_debug("RIO_EM: Invalid nextdev pointer (NULL)\n");
950 rio_read_config_32(rdev
,
951 rdev
->phys_efptr
+ RIO_PORT_N_ERR_STS_CSR(pnum
),
953 pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum
, err_status
);
956 if ((err_status
& RIO_PORT_N_ERR_STS_PW_INP_ES
) && nextdev
) {
957 pr_debug("RIO_EM: servicing Input Error-Stopped state\n");
958 rio_get_input_status(nextdev
,
959 RIO_GET_PORT_NUM(nextdev
->swpinfo
), NULL
);
962 rio_read_config_32(rdev
,
963 rdev
->phys_efptr
+ RIO_PORT_N_ERR_STS_CSR(pnum
),
965 pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum
, err_status
);
968 return (err_status
& (RIO_PORT_N_ERR_STS_PW_OUT_ES
|
969 RIO_PORT_N_ERR_STS_PW_INP_ES
)) ? 1 : 0;
973 * rio_inb_pwrite_handler - process inbound port-write message
974 * @pw_msg: pointer to inbound port-write message
976 * Processes an inbound port-write message. Returns 0 if the request
977 * has been satisfied.
979 int rio_inb_pwrite_handler(union rio_pw_msg
*pw_msg
)
981 struct rio_dev
*rdev
;
982 u32 err_status
, em_perrdet
, em_ltlerrdet
;
985 rdev
= rio_get_comptag((pw_msg
->em
.comptag
& RIO_CTAG_UDEVID
), NULL
);
987 /* Device removed or enumeration error */
988 pr_debug("RIO: %s No matching device for CTag 0x%08x\n",
989 __func__
, pw_msg
->em
.comptag
);
993 pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev
));
998 for (i
= 0; i
< RIO_PW_MSG_SIZE
/sizeof(u32
);) {
999 pr_debug("0x%02x: %08x %08x %08x %08x\n",
1000 i
*4, pw_msg
->raw
[i
], pw_msg
->raw
[i
+ 1],
1001 pw_msg
->raw
[i
+ 2], pw_msg
->raw
[i
+ 3]);
1007 /* Call an external service function (if such is registered
1008 * for this device). This may be the service for endpoints that send
1009 * device-specific port-write messages. End-point messages expected
1010 * to be handled completely by EP specific device driver.
1011 * For switches rc==0 signals that no standard processing required.
1013 if (rdev
->pwcback
!= NULL
) {
1014 rc
= rdev
->pwcback(rdev
, pw_msg
, 0);
1019 portnum
= pw_msg
->em
.is_port
& 0xFF;
1021 /* Check if device and route to it are functional:
1022 * Sometimes devices may send PW message(s) just before being
1023 * powered down (or link being lost).
1025 if (rio_chk_dev_access(rdev
)) {
1026 pr_debug("RIO: device access failed - get link partner\n");
1027 /* Scan route to the device and identify failed link.
1028 * This will replace device and port reported in PW message.
1029 * PW message should not be used after this point.
1031 if (rio_chk_dev_route(rdev
, &rdev
, &portnum
)) {
1032 pr_err("RIO: Route trace for %s failed\n",
1039 /* For End-point devices processing stops here */
1040 if (!(rdev
->pef
& RIO_PEF_SWITCH
))
1043 if (rdev
->phys_efptr
== 0) {
1044 pr_err("RIO_PW: Bad switch initialization for %s\n",
1050 * Process the port-write notification from switch
1052 if (rdev
->rswitch
->ops
&& rdev
->rswitch
->ops
->em_handle
)
1053 rdev
->rswitch
->ops
->em_handle(rdev
, portnum
);
1055 rio_read_config_32(rdev
,
1056 rdev
->phys_efptr
+ RIO_PORT_N_ERR_STS_CSR(portnum
),
1058 pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum
, err_status
);
1060 if (err_status
& RIO_PORT_N_ERR_STS_PORT_OK
) {
1062 if (!(rdev
->rswitch
->port_ok
& (1 << portnum
))) {
1063 rdev
->rswitch
->port_ok
|= (1 << portnum
);
1064 rio_set_port_lockout(rdev
, portnum
, 0);
1065 /* Schedule Insertion Service */
1066 pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n",
1067 rio_name(rdev
), portnum
);
1070 /* Clear error-stopped states (if reported).
1071 * Depending on the link partner state, two attempts
1072 * may be needed for successful recovery.
1074 if (err_status
& (RIO_PORT_N_ERR_STS_PW_OUT_ES
|
1075 RIO_PORT_N_ERR_STS_PW_INP_ES
)) {
1076 if (rio_clr_err_stopped(rdev
, portnum
, err_status
))
1077 rio_clr_err_stopped(rdev
, portnum
, 0);
1079 } else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */
1081 if (rdev
->rswitch
->port_ok
& (1 << portnum
)) {
1082 rdev
->rswitch
->port_ok
&= ~(1 << portnum
);
1083 rio_set_port_lockout(rdev
, portnum
, 1);
1085 rio_write_config_32(rdev
,
1087 RIO_PORT_N_ACK_STS_CSR(portnum
),
1088 RIO_PORT_N_ACK_CLEAR
);
1090 /* Schedule Extraction Service */
1091 pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n",
1092 rio_name(rdev
), portnum
);
1096 rio_read_config_32(rdev
,
1097 rdev
->em_efptr
+ RIO_EM_PN_ERR_DETECT(portnum
), &em_perrdet
);
1099 pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n",
1100 portnum
, em_perrdet
);
1101 /* Clear EM Port N Error Detect CSR */
1102 rio_write_config_32(rdev
,
1103 rdev
->em_efptr
+ RIO_EM_PN_ERR_DETECT(portnum
), 0);
1106 rio_read_config_32(rdev
,
1107 rdev
->em_efptr
+ RIO_EM_LTL_ERR_DETECT
, &em_ltlerrdet
);
1109 pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n",
1111 /* Clear EM L/T Layer Error Detect CSR */
1112 rio_write_config_32(rdev
,
1113 rdev
->em_efptr
+ RIO_EM_LTL_ERR_DETECT
, 0);
1116 /* Clear remaining error bits and Port-Write Pending bit */
1117 rio_write_config_32(rdev
,
1118 rdev
->phys_efptr
+ RIO_PORT_N_ERR_STS_CSR(portnum
),
1123 EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler
);
1126 * rio_mport_get_efb - get pointer to next extended features block
1127 * @port: Master port to issue transaction
1128 * @local: Indicate a local master port or remote device access
1129 * @destid: Destination ID of the device
1130 * @hopcount: Number of switch hops to the device
1131 * @from: Offset of current Extended Feature block header (if 0 starts
1132 * from ExtFeaturePtr)
1135 rio_mport_get_efb(struct rio_mport
*port
, int local
, u16 destid
,
1136 u8 hopcount
, u32 from
)
1142 rio_local_read_config_32(port
, RIO_ASM_INFO_CAR
,
1145 rio_mport_read_config_32(port
, destid
, hopcount
,
1146 RIO_ASM_INFO_CAR
, ®_val
);
1147 return reg_val
& RIO_EXT_FTR_PTR_MASK
;
1150 rio_local_read_config_32(port
, from
, ®_val
);
1152 rio_mport_read_config_32(port
, destid
, hopcount
,
1154 return RIO_GET_BLOCK_ID(reg_val
);
1157 EXPORT_SYMBOL_GPL(rio_mport_get_efb
);
1160 * rio_mport_get_feature - query for devices' extended features
1161 * @port: Master port to issue transaction
1162 * @local: Indicate a local master port or remote device access
1163 * @destid: Destination ID of the device
1164 * @hopcount: Number of switch hops to the device
1165 * @ftr: Extended feature code
1167 * Tell if a device supports a given RapidIO capability.
1168 * Returns the offset of the requested extended feature
1169 * block within the device's RIO configuration space or
1170 * 0 in case the device does not support it. Possible
1173 * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices
1175 * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices
1177 * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices
1179 * %RIO_EFB_SER_EP_ID LP/Serial EP Devices
1181 * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices
1183 * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices
1186 rio_mport_get_feature(struct rio_mport
* port
, int local
, u16 destid
,
1187 u8 hopcount
, int ftr
)
1189 u32 asm_info
, ext_ftr_ptr
, ftr_header
;
1192 rio_local_read_config_32(port
, RIO_ASM_INFO_CAR
, &asm_info
);
1194 rio_mport_read_config_32(port
, destid
, hopcount
,
1195 RIO_ASM_INFO_CAR
, &asm_info
);
1197 ext_ftr_ptr
= asm_info
& RIO_EXT_FTR_PTR_MASK
;
1199 while (ext_ftr_ptr
) {
1201 rio_local_read_config_32(port
, ext_ftr_ptr
,
1204 rio_mport_read_config_32(port
, destid
, hopcount
,
1205 ext_ftr_ptr
, &ftr_header
);
1206 if (RIO_GET_BLOCK_ID(ftr_header
) == ftr
)
1208 if (!(ext_ftr_ptr
= RIO_GET_BLOCK_PTR(ftr_header
)))
1214 EXPORT_SYMBOL_GPL(rio_mport_get_feature
);
1217 * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did
1218 * @vid: RIO vid to match or %RIO_ANY_ID to match all vids
1219 * @did: RIO did to match or %RIO_ANY_ID to match all dids
1220 * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids
1221 * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids
1222 * @from: Previous RIO device found in search, or %NULL for new search
1224 * Iterates through the list of known RIO devices. If a RIO device is
1225 * found with a matching @vid, @did, @asm_vid, @asm_did, the reference
1226 * count to the device is incrememted and a pointer to its device
1227 * structure is returned. Otherwise, %NULL is returned. A new search
1228 * is initiated by passing %NULL to the @from argument. Otherwise, if
1229 * @from is not %NULL, searches continue from next device on the global
1230 * list. The reference count for @from is always decremented if it is
1233 struct rio_dev
*rio_get_asm(u16 vid
, u16 did
,
1234 u16 asm_vid
, u16 asm_did
, struct rio_dev
*from
)
1236 struct list_head
*n
;
1237 struct rio_dev
*rdev
;
1239 WARN_ON(in_interrupt());
1240 spin_lock(&rio_global_list_lock
);
1241 n
= from
? from
->global_list
.next
: rio_devices
.next
;
1243 while (n
&& (n
!= &rio_devices
)) {
1244 rdev
= rio_dev_g(n
);
1245 if ((vid
== RIO_ANY_ID
|| rdev
->vid
== vid
) &&
1246 (did
== RIO_ANY_ID
|| rdev
->did
== did
) &&
1247 (asm_vid
== RIO_ANY_ID
|| rdev
->asm_vid
== asm_vid
) &&
1248 (asm_did
== RIO_ANY_ID
|| rdev
->asm_did
== asm_did
))
1255 rdev
= rio_dev_get(rdev
);
1256 spin_unlock(&rio_global_list_lock
);
1261 * rio_get_device - Begin or continue searching for a RIO device by vid/did
1262 * @vid: RIO vid to match or %RIO_ANY_ID to match all vids
1263 * @did: RIO did to match or %RIO_ANY_ID to match all dids
1264 * @from: Previous RIO device found in search, or %NULL for new search
1266 * Iterates through the list of known RIO devices. If a RIO device is
1267 * found with a matching @vid and @did, the reference count to the
1268 * device is incrememted and a pointer to its device structure is returned.
1269 * Otherwise, %NULL is returned. A new search is initiated by passing %NULL
1270 * to the @from argument. Otherwise, if @from is not %NULL, searches
1271 * continue from next device on the global list. The reference count for
1272 * @from is always decremented if it is not %NULL.
1274 struct rio_dev
*rio_get_device(u16 vid
, u16 did
, struct rio_dev
*from
)
1276 return rio_get_asm(vid
, did
, RIO_ANY_ID
, RIO_ANY_ID
, from
);
1280 * rio_std_route_add_entry - Add switch route table entry using standard
1281 * registers defined in RIO specification rev.1.3
1282 * @mport: Master port to issue transaction
1283 * @destid: Destination ID of the device
1284 * @hopcount: Number of switch hops to the device
1285 * @table: routing table ID (global or port-specific)
1286 * @route_destid: destID entry in the RT
1287 * @route_port: destination port for specified destID
1290 rio_std_route_add_entry(struct rio_mport
*mport
, u16 destid
, u8 hopcount
,
1291 u16 table
, u16 route_destid
, u8 route_port
)
1293 if (table
== RIO_GLOBAL_TABLE
) {
1294 rio_mport_write_config_32(mport
, destid
, hopcount
,
1295 RIO_STD_RTE_CONF_DESTID_SEL_CSR
,
1297 rio_mport_write_config_32(mport
, destid
, hopcount
,
1298 RIO_STD_RTE_CONF_PORT_SEL_CSR
,
1307 * rio_std_route_get_entry - Read switch route table entry (port number)
1308 * associated with specified destID using standard registers defined in RIO
1309 * specification rev.1.3
1310 * @mport: Master port to issue transaction
1311 * @destid: Destination ID of the device
1312 * @hopcount: Number of switch hops to the device
1313 * @table: routing table ID (global or port-specific)
1314 * @route_destid: destID entry in the RT
1315 * @route_port: returned destination port for specified destID
1318 rio_std_route_get_entry(struct rio_mport
*mport
, u16 destid
, u8 hopcount
,
1319 u16 table
, u16 route_destid
, u8
*route_port
)
1323 if (table
== RIO_GLOBAL_TABLE
) {
1324 rio_mport_write_config_32(mport
, destid
, hopcount
,
1325 RIO_STD_RTE_CONF_DESTID_SEL_CSR
, route_destid
);
1326 rio_mport_read_config_32(mport
, destid
, hopcount
,
1327 RIO_STD_RTE_CONF_PORT_SEL_CSR
, &result
);
1329 *route_port
= (u8
)result
;
1336 * rio_std_route_clr_table - Clear swotch route table using standard registers
1337 * defined in RIO specification rev.1.3.
1338 * @mport: Master port to issue transaction
1339 * @destid: Destination ID of the device
1340 * @hopcount: Number of switch hops to the device
1341 * @table: routing table ID (global or port-specific)
1344 rio_std_route_clr_table(struct rio_mport
*mport
, u16 destid
, u8 hopcount
,
1347 u32 max_destid
= 0xff;
1348 u32 i
, pef
, id_inc
= 1, ext_cfg
= 0;
1349 u32 port_sel
= RIO_INVALID_ROUTE
;
1351 if (table
== RIO_GLOBAL_TABLE
) {
1352 rio_mport_read_config_32(mport
, destid
, hopcount
,
1355 if (mport
->sys_size
) {
1356 rio_mport_read_config_32(mport
, destid
, hopcount
,
1357 RIO_SWITCH_RT_LIMIT
,
1359 max_destid
&= RIO_RT_MAX_DESTID
;
1362 if (pef
& RIO_PEF_EXT_RT
) {
1363 ext_cfg
= 0x80000000;
1365 port_sel
= (RIO_INVALID_ROUTE
<< 24) |
1366 (RIO_INVALID_ROUTE
<< 16) |
1367 (RIO_INVALID_ROUTE
<< 8) |
1371 for (i
= 0; i
<= max_destid
;) {
1372 rio_mport_write_config_32(mport
, destid
, hopcount
,
1373 RIO_STD_RTE_CONF_DESTID_SEL_CSR
,
1375 rio_mport_write_config_32(mport
, destid
, hopcount
,
1376 RIO_STD_RTE_CONF_PORT_SEL_CSR
,
1387 * rio_lock_device - Acquires host device lock for specified device
1388 * @port: Master port to send transaction
1389 * @destid: Destination ID for device/switch
1390 * @hopcount: Hopcount to reach switch
1391 * @wait_ms: Max wait time in msec (0 = no timeout)
1393 * Attepts to acquire host device lock for specified device
1394 * Returns 0 if device lock acquired or EINVAL if timeout expires.
1396 int rio_lock_device(struct rio_mport
*port
, u16 destid
,
1397 u8 hopcount
, int wait_ms
)
1402 /* Attempt to acquire device lock */
1403 rio_mport_write_config_32(port
, destid
, hopcount
,
1404 RIO_HOST_DID_LOCK_CSR
, port
->host_deviceid
);
1405 rio_mport_read_config_32(port
, destid
, hopcount
,
1406 RIO_HOST_DID_LOCK_CSR
, &result
);
1408 while (result
!= port
->host_deviceid
) {
1409 if (wait_ms
!= 0 && tcnt
== wait_ms
) {
1410 pr_debug("RIO: timeout when locking device %x:%x\n",
1418 /* Try to acquire device lock again */
1419 rio_mport_write_config_32(port
, destid
,
1421 RIO_HOST_DID_LOCK_CSR
,
1422 port
->host_deviceid
);
1423 rio_mport_read_config_32(port
, destid
,
1425 RIO_HOST_DID_LOCK_CSR
, &result
);
1430 EXPORT_SYMBOL_GPL(rio_lock_device
);
1433 * rio_unlock_device - Releases host device lock for specified device
1434 * @port: Master port to send transaction
1435 * @destid: Destination ID for device/switch
1436 * @hopcount: Hopcount to reach switch
1438 * Returns 0 if device lock released or EINVAL if fails.
1440 int rio_unlock_device(struct rio_mport
*port
, u16 destid
, u8 hopcount
)
1444 /* Release device lock */
1445 rio_mport_write_config_32(port
, destid
,
1447 RIO_HOST_DID_LOCK_CSR
,
1448 port
->host_deviceid
);
1449 rio_mport_read_config_32(port
, destid
, hopcount
,
1450 RIO_HOST_DID_LOCK_CSR
, &result
);
1451 if ((result
& 0xffff) != 0xffff) {
1452 pr_debug("RIO: badness when releasing device lock %x:%x\n",
1459 EXPORT_SYMBOL_GPL(rio_unlock_device
);
1462 * rio_route_add_entry- Add a route entry to a switch routing table
1464 * @table: Routing table ID
1465 * @route_destid: Destination ID to be routed
1466 * @route_port: Port number to be routed
1467 * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock)
1469 * If available calls the switch specific add_entry() method to add a route
1470 * entry into a switch routing table. Otherwise uses standard RT update method
1471 * as defined by RapidIO specification. A specific routing table can be selected
1472 * using the @table argument if a switch has per port routing tables or
1473 * the standard (or global) table may be used by passing
1474 * %RIO_GLOBAL_TABLE in @table.
1476 * Returns %0 on success or %-EINVAL on failure.
1478 int rio_route_add_entry(struct rio_dev
*rdev
,
1479 u16 table
, u16 route_destid
, u8 route_port
, int lock
)
1482 struct rio_switch_ops
*ops
= rdev
->rswitch
->ops
;
1485 rc
= rio_lock_device(rdev
->net
->hport
, rdev
->destid
,
1486 rdev
->hopcount
, 1000);
1491 spin_lock(&rdev
->rswitch
->lock
);
1493 if (ops
== NULL
|| ops
->add_entry
== NULL
) {
1494 rc
= rio_std_route_add_entry(rdev
->net
->hport
, rdev
->destid
,
1495 rdev
->hopcount
, table
,
1496 route_destid
, route_port
);
1497 } else if (try_module_get(ops
->owner
)) {
1498 rc
= ops
->add_entry(rdev
->net
->hport
, rdev
->destid
,
1499 rdev
->hopcount
, table
, route_destid
,
1501 module_put(ops
->owner
);
1504 spin_unlock(&rdev
->rswitch
->lock
);
1507 rio_unlock_device(rdev
->net
->hport
, rdev
->destid
,
1512 EXPORT_SYMBOL_GPL(rio_route_add_entry
);
1515 * rio_route_get_entry- Read an entry from a switch routing table
1517 * @table: Routing table ID
1518 * @route_destid: Destination ID to be routed
1519 * @route_port: Pointer to read port number into
1520 * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock)
1522 * If available calls the switch specific get_entry() method to fetch a route
1523 * entry from a switch routing table. Otherwise uses standard RT read method
1524 * as defined by RapidIO specification. A specific routing table can be selected
1525 * using the @table argument if a switch has per port routing tables or
1526 * the standard (or global) table may be used by passing
1527 * %RIO_GLOBAL_TABLE in @table.
1529 * Returns %0 on success or %-EINVAL on failure.
1531 int rio_route_get_entry(struct rio_dev
*rdev
, u16 table
,
1532 u16 route_destid
, u8
*route_port
, int lock
)
1535 struct rio_switch_ops
*ops
= rdev
->rswitch
->ops
;
1538 rc
= rio_lock_device(rdev
->net
->hport
, rdev
->destid
,
1539 rdev
->hopcount
, 1000);
1544 spin_lock(&rdev
->rswitch
->lock
);
1546 if (ops
== NULL
|| ops
->get_entry
== NULL
) {
1547 rc
= rio_std_route_get_entry(rdev
->net
->hport
, rdev
->destid
,
1548 rdev
->hopcount
, table
,
1549 route_destid
, route_port
);
1550 } else if (try_module_get(ops
->owner
)) {
1551 rc
= ops
->get_entry(rdev
->net
->hport
, rdev
->destid
,
1552 rdev
->hopcount
, table
, route_destid
,
1554 module_put(ops
->owner
);
1557 spin_unlock(&rdev
->rswitch
->lock
);
1560 rio_unlock_device(rdev
->net
->hport
, rdev
->destid
,
1564 EXPORT_SYMBOL_GPL(rio_route_get_entry
);
1567 * rio_route_clr_table - Clear a switch routing table
1569 * @table: Routing table ID
1570 * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock)
1572 * If available calls the switch specific clr_table() method to clear a switch
1573 * routing table. Otherwise uses standard RT write method as defined by RapidIO
1574 * specification. A specific routing table can be selected using the @table
1575 * argument if a switch has per port routing tables or the standard (or global)
1576 * table may be used by passing %RIO_GLOBAL_TABLE in @table.
1578 * Returns %0 on success or %-EINVAL on failure.
1580 int rio_route_clr_table(struct rio_dev
*rdev
, u16 table
, int lock
)
1583 struct rio_switch_ops
*ops
= rdev
->rswitch
->ops
;
1586 rc
= rio_lock_device(rdev
->net
->hport
, rdev
->destid
,
1587 rdev
->hopcount
, 1000);
1592 spin_lock(&rdev
->rswitch
->lock
);
1594 if (ops
== NULL
|| ops
->clr_table
== NULL
) {
1595 rc
= rio_std_route_clr_table(rdev
->net
->hport
, rdev
->destid
,
1596 rdev
->hopcount
, table
);
1597 } else if (try_module_get(ops
->owner
)) {
1598 rc
= ops
->clr_table(rdev
->net
->hport
, rdev
->destid
,
1599 rdev
->hopcount
, table
);
1601 module_put(ops
->owner
);
1604 spin_unlock(&rdev
->rswitch
->lock
);
1607 rio_unlock_device(rdev
->net
->hport
, rdev
->destid
,
1612 EXPORT_SYMBOL_GPL(rio_route_clr_table
);
1614 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
1616 static bool rio_chan_filter(struct dma_chan
*chan
, void *arg
)
1618 struct rio_mport
*mport
= arg
;
1620 /* Check that DMA device belongs to the right MPORT */
1621 return mport
== container_of(chan
->device
, struct rio_mport
, dma
);
1625 * rio_request_mport_dma - request RapidIO capable DMA channel associated
1626 * with specified local RapidIO mport device.
1627 * @mport: RIO mport to perform DMA data transfers
1629 * Returns pointer to allocated DMA channel or NULL if failed.
1631 struct dma_chan
*rio_request_mport_dma(struct rio_mport
*mport
)
1633 dma_cap_mask_t mask
;
1636 dma_cap_set(DMA_SLAVE
, mask
);
1637 return dma_request_channel(mask
, rio_chan_filter
, mport
);
1639 EXPORT_SYMBOL_GPL(rio_request_mport_dma
);
1642 * rio_request_dma - request RapidIO capable DMA channel that supports
1643 * specified target RapidIO device.
1644 * @rdev: RIO device associated with DMA transfer
1646 * Returns pointer to allocated DMA channel or NULL if failed.
1648 struct dma_chan
*rio_request_dma(struct rio_dev
*rdev
)
1650 return rio_request_mport_dma(rdev
->net
->hport
);
1652 EXPORT_SYMBOL_GPL(rio_request_dma
);
1655 * rio_release_dma - release specified DMA channel
1656 * @dchan: DMA channel to release
1658 void rio_release_dma(struct dma_chan
*dchan
)
1660 dma_release_channel(dchan
);
1662 EXPORT_SYMBOL_GPL(rio_release_dma
);
1665 * rio_dma_prep_xfer - RapidIO specific wrapper
1666 * for device_prep_slave_sg callback defined by DMAENGINE.
1667 * @dchan: DMA channel to configure
1668 * @destid: target RapidIO device destination ID
1669 * @data: RIO specific data descriptor
1670 * @direction: DMA data transfer direction (TO or FROM the device)
1671 * @flags: dmaengine defined flags
1673 * Initializes RapidIO capable DMA channel for the specified data transfer.
1674 * Uses DMA channel private extension to pass information related to remote
1675 * target RIO device.
1676 * Returns pointer to DMA transaction descriptor or NULL if failed.
1678 struct dma_async_tx_descriptor
*rio_dma_prep_xfer(struct dma_chan
*dchan
,
1679 u16 destid
, struct rio_dma_data
*data
,
1680 enum dma_transfer_direction direction
, unsigned long flags
)
1682 struct rio_dma_ext rio_ext
;
1684 if (dchan
->device
->device_prep_slave_sg
== NULL
) {
1685 pr_err("%s: prep_rio_sg == NULL\n", __func__
);
1689 rio_ext
.destid
= destid
;
1690 rio_ext
.rio_addr_u
= data
->rio_addr_u
;
1691 rio_ext
.rio_addr
= data
->rio_addr
;
1692 rio_ext
.wr_type
= data
->wr_type
;
1694 return dmaengine_prep_rio_sg(dchan
, data
->sg
, data
->sg_len
,
1695 direction
, flags
, &rio_ext
);
1697 EXPORT_SYMBOL_GPL(rio_dma_prep_xfer
);
1700 * rio_dma_prep_slave_sg - RapidIO specific wrapper
1701 * for device_prep_slave_sg callback defined by DMAENGINE.
1702 * @rdev: RIO device control structure
1703 * @dchan: DMA channel to configure
1704 * @data: RIO specific data descriptor
1705 * @direction: DMA data transfer direction (TO or FROM the device)
1706 * @flags: dmaengine defined flags
1708 * Initializes RapidIO capable DMA channel for the specified data transfer.
1709 * Uses DMA channel private extension to pass information related to remote
1710 * target RIO device.
1711 * Returns pointer to DMA transaction descriptor or NULL if failed.
1713 struct dma_async_tx_descriptor
*rio_dma_prep_slave_sg(struct rio_dev
*rdev
,
1714 struct dma_chan
*dchan
, struct rio_dma_data
*data
,
1715 enum dma_transfer_direction direction
, unsigned long flags
)
1717 return rio_dma_prep_xfer(dchan
, rdev
->destid
, data
, direction
, flags
);
1719 EXPORT_SYMBOL_GPL(rio_dma_prep_slave_sg
);
1721 #endif /* CONFIG_RAPIDIO_DMA_ENGINE */
1724 * rio_find_mport - find RIO mport by its ID
1725 * @mport_id: number (ID) of mport device
1727 * Given a RIO mport number, the desired mport is located
1728 * in the global list of mports. If the mport is found, a pointer to its
1729 * data structure is returned. If no mport is found, %NULL is returned.
1731 struct rio_mport
*rio_find_mport(int mport_id
)
1733 struct rio_mport
*port
;
1735 mutex_lock(&rio_mport_list_lock
);
1736 list_for_each_entry(port
, &rio_mports
, node
) {
1737 if (port
->id
== mport_id
)
1742 mutex_unlock(&rio_mport_list_lock
);
1748 * rio_register_scan - enumeration/discovery method registration interface
1749 * @mport_id: mport device ID for which fabric scan routine has to be set
1750 * (RIO_MPORT_ANY = set for all available mports)
1751 * @scan_ops: enumeration/discovery operations structure
1753 * Registers enumeration/discovery operations with RapidIO subsystem and
1754 * attaches it to the specified mport device (or all available mports
1755 * if RIO_MPORT_ANY is specified).
1757 * Returns error if the mport already has an enumerator attached to it.
1758 * In case of RIO_MPORT_ANY skips mports with valid scan routines (no error).
1760 int rio_register_scan(int mport_id
, struct rio_scan
*scan_ops
)
1762 struct rio_mport
*port
;
1763 struct rio_scan_node
*scan
;
1766 pr_debug("RIO: %s for mport_id=%d\n", __func__
, mport_id
);
1768 if ((mport_id
!= RIO_MPORT_ANY
&& mport_id
>= RIO_MAX_MPORTS
) ||
1772 mutex_lock(&rio_mport_list_lock
);
1775 * Check if there is another enumerator already registered for
1776 * the same mport ID (including RIO_MPORT_ANY). Multiple enumerators
1777 * for the same mport ID are not supported.
1779 list_for_each_entry(scan
, &rio_scans
, node
) {
1780 if (scan
->mport_id
== mport_id
) {
1787 * Allocate and initialize new scan registration node.
1789 scan
= kzalloc(sizeof(*scan
), GFP_KERNEL
);
1795 scan
->mport_id
= mport_id
;
1796 scan
->ops
= scan_ops
;
1799 * Traverse the list of registered mports to attach this new scan.
1801 * The new scan with matching mport ID overrides any previously attached
1802 * scan assuming that old scan (if any) is the default one (based on the
1803 * enumerator registration check above).
1804 * If the new scan is the global one, it will be attached only to mports
1805 * that do not have their own individual operations already attached.
1807 list_for_each_entry(port
, &rio_mports
, node
) {
1808 if (port
->id
== mport_id
) {
1809 port
->nscan
= scan_ops
;
1811 } else if (mport_id
== RIO_MPORT_ANY
&& !port
->nscan
)
1812 port
->nscan
= scan_ops
;
1815 list_add_tail(&scan
->node
, &rio_scans
);
1818 mutex_unlock(&rio_mport_list_lock
);
1822 EXPORT_SYMBOL_GPL(rio_register_scan
);
1825 * rio_unregister_scan - removes enumeration/discovery method from mport
1826 * @mport_id: mport device ID for which fabric scan routine has to be
1827 * unregistered (RIO_MPORT_ANY = apply to all mports that use
1828 * the specified scan_ops)
1829 * @scan_ops: enumeration/discovery operations structure
1831 * Removes enumeration or discovery method assigned to the specified mport
1832 * device. If RIO_MPORT_ANY is specified, removes the specified operations from
1833 * all mports that have them attached.
1835 int rio_unregister_scan(int mport_id
, struct rio_scan
*scan_ops
)
1837 struct rio_mport
*port
;
1838 struct rio_scan_node
*scan
;
1840 pr_debug("RIO: %s for mport_id=%d\n", __func__
, mport_id
);
1842 if (mport_id
!= RIO_MPORT_ANY
&& mport_id
>= RIO_MAX_MPORTS
)
1845 mutex_lock(&rio_mport_list_lock
);
1847 list_for_each_entry(port
, &rio_mports
, node
)
1848 if (port
->id
== mport_id
||
1849 (mport_id
== RIO_MPORT_ANY
&& port
->nscan
== scan_ops
))
1852 list_for_each_entry(scan
, &rio_scans
, node
) {
1853 if (scan
->mport_id
== mport_id
) {
1854 list_del(&scan
->node
);
1860 mutex_unlock(&rio_mport_list_lock
);
1864 EXPORT_SYMBOL_GPL(rio_unregister_scan
);
1867 * rio_mport_scan - execute enumeration/discovery on the specified mport
1868 * @mport_id: number (ID) of mport device
1870 int rio_mport_scan(int mport_id
)
1872 struct rio_mport
*port
= NULL
;
1875 mutex_lock(&rio_mport_list_lock
);
1876 list_for_each_entry(port
, &rio_mports
, node
) {
1877 if (port
->id
== mport_id
)
1880 mutex_unlock(&rio_mport_list_lock
);
1884 mutex_unlock(&rio_mport_list_lock
);
1888 if (!try_module_get(port
->nscan
->owner
)) {
1889 mutex_unlock(&rio_mport_list_lock
);
1893 mutex_unlock(&rio_mport_list_lock
);
1895 if (port
->host_deviceid
>= 0)
1896 rc
= port
->nscan
->enumerate(port
, 0);
1898 rc
= port
->nscan
->discover(port
, RIO_SCAN_ENUM_NO_WAIT
);
1900 module_put(port
->nscan
->owner
);
1904 static void rio_fixup_device(struct rio_dev
*dev
)
1908 static int rio_init(void)
1910 struct rio_dev
*dev
= NULL
;
1912 while ((dev
= rio_get_device(RIO_ANY_ID
, RIO_ANY_ID
, dev
)) != NULL
) {
1913 rio_fixup_device(dev
);
1918 static struct workqueue_struct
*rio_wq
;
1920 struct rio_disc_work
{
1921 struct work_struct work
;
1922 struct rio_mport
*mport
;
1925 static void disc_work_handler(struct work_struct
*_work
)
1927 struct rio_disc_work
*work
;
1929 work
= container_of(_work
, struct rio_disc_work
, work
);
1930 pr_debug("RIO: discovery work for mport %d %s\n",
1931 work
->mport
->id
, work
->mport
->name
);
1932 if (try_module_get(work
->mport
->nscan
->owner
)) {
1933 work
->mport
->nscan
->discover(work
->mport
, 0);
1934 module_put(work
->mport
->nscan
->owner
);
1938 int rio_init_mports(void)
1940 struct rio_mport
*port
;
1941 struct rio_disc_work
*work
;
1948 * First, run enumerations and check if we need to perform discovery
1949 * on any of the registered mports.
1951 mutex_lock(&rio_mport_list_lock
);
1952 list_for_each_entry(port
, &rio_mports
, node
) {
1953 if (port
->host_deviceid
>= 0) {
1954 if (port
->nscan
&& try_module_get(port
->nscan
->owner
)) {
1955 port
->nscan
->enumerate(port
, 0);
1956 module_put(port
->nscan
->owner
);
1961 mutex_unlock(&rio_mport_list_lock
);
1967 * If we have mports that require discovery schedule a discovery work
1968 * for each of them. If the code below fails to allocate needed
1969 * resources, exit without error to keep results of enumeration
1971 * TODO: Implement restart of discovery process for all or
1972 * individual discovering mports.
1974 rio_wq
= alloc_workqueue("riodisc", 0, 0);
1976 pr_err("RIO: unable allocate rio_wq\n");
1980 work
= kcalloc(n
, sizeof *work
, GFP_KERNEL
);
1982 pr_err("RIO: no memory for work struct\n");
1983 destroy_workqueue(rio_wq
);
1988 mutex_lock(&rio_mport_list_lock
);
1989 list_for_each_entry(port
, &rio_mports
, node
) {
1990 if (port
->host_deviceid
< 0 && port
->nscan
) {
1991 work
[n
].mport
= port
;
1992 INIT_WORK(&work
[n
].work
, disc_work_handler
);
1993 queue_work(rio_wq
, &work
[n
].work
);
1998 flush_workqueue(rio_wq
);
1999 mutex_unlock(&rio_mport_list_lock
);
2000 pr_debug("RIO: destroy discovery workqueue\n");
2001 destroy_workqueue(rio_wq
);
2010 static int rio_get_hdid(int index
)
2012 if (ids_num
== 0 || ids_num
<= index
|| index
>= RIO_MAX_MPORTS
)
2018 int rio_mport_initialize(struct rio_mport
*mport
)
2020 if (next_portid
>= RIO_MAX_MPORTS
) {
2021 pr_err("RIO: reached specified max number of mports\n");
2025 atomic_set(&mport
->state
, RIO_DEVICE_INITIALIZING
);
2026 mport
->id
= next_portid
++;
2027 mport
->host_deviceid
= rio_get_hdid(mport
->id
);
2028 mport
->nscan
= NULL
;
2029 mutex_init(&mport
->lock
);
2033 EXPORT_SYMBOL_GPL(rio_mport_initialize
);
2035 int rio_register_mport(struct rio_mport
*port
)
2037 struct rio_scan_node
*scan
= NULL
;
2040 mutex_lock(&rio_mport_list_lock
);
2043 * Check if there are any registered enumeration/discovery operations
2044 * that have to be attached to the added mport.
2046 list_for_each_entry(scan
, &rio_scans
, node
) {
2047 if (port
->id
== scan
->mport_id
||
2048 scan
->mport_id
== RIO_MPORT_ANY
) {
2049 port
->nscan
= scan
->ops
;
2050 if (port
->id
== scan
->mport_id
)
2055 list_add_tail(&port
->node
, &rio_mports
);
2056 mutex_unlock(&rio_mport_list_lock
);
2058 dev_set_name(&port
->dev
, "rapidio%d", port
->id
);
2059 port
->dev
.class = &rio_mport_class
;
2060 atomic_set(&port
->state
, RIO_DEVICE_RUNNING
);
2062 res
= device_register(&port
->dev
);
2064 dev_err(&port
->dev
, "RIO: mport%d registration failed ERR=%d\n",
2067 dev_dbg(&port
->dev
, "RIO: registered mport%d\n", port
->id
);
2071 EXPORT_SYMBOL_GPL(rio_register_mport
);
2073 static int rio_mport_cleanup_callback(struct device
*dev
, void *data
)
2075 struct rio_dev
*rdev
= to_rio_dev(dev
);
2077 if (dev
->bus
== &rio_bus_type
)
2078 rio_del_device(rdev
, RIO_DEVICE_SHUTDOWN
);
2082 static int rio_net_remove_children(struct rio_net
*net
)
2085 * Unregister all RapidIO devices residing on this net (this will
2086 * invoke notification of registered subsystem interfaces as well).
2088 device_for_each_child(&net
->dev
, NULL
, rio_mport_cleanup_callback
);
2092 int rio_unregister_mport(struct rio_mport
*port
)
2094 pr_debug("RIO: %s %s id=%d\n", __func__
, port
->name
, port
->id
);
2096 /* Transition mport to the SHUTDOWN state */
2097 if (atomic_cmpxchg(&port
->state
,
2099 RIO_DEVICE_SHUTDOWN
) != RIO_DEVICE_RUNNING
) {
2100 pr_err("RIO: %s unexpected state transition for mport %s\n",
2101 __func__
, port
->name
);
2104 if (port
->net
&& port
->net
->hport
== port
) {
2105 rio_net_remove_children(port
->net
);
2106 rio_free_net(port
->net
);
2110 * Unregister all RapidIO devices attached to this mport (this will
2111 * invoke notification of registered subsystem interfaces as well).
2113 mutex_lock(&rio_mport_list_lock
);
2114 list_del(&port
->node
);
2115 mutex_unlock(&rio_mport_list_lock
);
2116 device_unregister(&port
->dev
);
2120 EXPORT_SYMBOL_GPL(rio_unregister_mport
);
2122 EXPORT_SYMBOL_GPL(rio_local_get_device_id
);
2123 EXPORT_SYMBOL_GPL(rio_get_device
);
2124 EXPORT_SYMBOL_GPL(rio_get_asm
);
2125 EXPORT_SYMBOL_GPL(rio_request_inb_dbell
);
2126 EXPORT_SYMBOL_GPL(rio_release_inb_dbell
);
2127 EXPORT_SYMBOL_GPL(rio_request_outb_dbell
);
2128 EXPORT_SYMBOL_GPL(rio_release_outb_dbell
);
2129 EXPORT_SYMBOL_GPL(rio_request_inb_mbox
);
2130 EXPORT_SYMBOL_GPL(rio_release_inb_mbox
);
2131 EXPORT_SYMBOL_GPL(rio_request_outb_mbox
);
2132 EXPORT_SYMBOL_GPL(rio_release_outb_mbox
);
2133 EXPORT_SYMBOL_GPL(rio_init_mports
);