2 * RapidIO enumeration and discovery support
4 * Copyright 2005 MontaVista Software, Inc.
5 * Matt Porter <mporter@kernel.crashing.org>
7 * Copyright 2009 Integrated Device Technology, Inc.
8 * Alex Bounine <alexandre.bounine@idt.com>
9 * - Added Port-Write/Error Management initialization and handling
11 * Copyright 2009 Sysgo AG
12 * Thomas Moll <thomas.moll@sysgo.com>
13 * - Added Input- Output- enable functionality, to allow full communication
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the License, or (at your
18 * option) any later version.
21 #include <linux/types.h>
22 #include <linux/kernel.h>
24 #include <linux/delay.h>
25 #include <linux/dma-mapping.h>
26 #include <linux/init.h>
27 #include <linux/rio.h>
28 #include <linux/rio_drv.h>
29 #include <linux/rio_ids.h>
30 #include <linux/rio_regs.h>
31 #include <linux/module.h>
32 #include <linux/spinlock.h>
33 #include <linux/timer.h>
34 #include <linux/jiffies.h>
35 #include <linux/slab.h>
39 LIST_HEAD(rio_devices
);
40 static LIST_HEAD(rio_switches
);
42 static void rio_enum_timeout(unsigned long);
44 static void rio_init_em(struct rio_dev
*rdev
);
46 DEFINE_SPINLOCK(rio_global_list_lock
);
48 static int next_destid
= 0;
49 static int next_switchid
= 0;
50 static int next_net
= 0;
51 static int next_comptag
= 1;
53 static struct timer_list rio_enum_timer
=
54 TIMER_INITIALIZER(rio_enum_timeout
, 0, 0);
56 static int rio_mport_phys_table
[] = {
58 RIO_EFB_PAR_EP_REC_ID
,
60 RIO_EFB_SER_EP_REC_ID
,
65 * rio_get_device_id - Get the base/extended device id for a device
66 * @port: RIO master port
67 * @destid: Destination ID of device
68 * @hopcount: Hopcount to device
70 * Reads the base/extended device id from a device. Returns the
73 static u16
rio_get_device_id(struct rio_mport
*port
, u16 destid
, u8 hopcount
)
77 rio_mport_read_config_32(port
, destid
, hopcount
, RIO_DID_CSR
, &result
);
79 return RIO_GET_DID(port
->sys_size
, result
);
83 * rio_set_device_id - Set the base/extended device id for a device
84 * @port: RIO master port
85 * @destid: Destination ID of device
86 * @hopcount: Hopcount to device
87 * @did: Device ID value to be written
89 * Writes the base/extended device id from a device.
91 static void rio_set_device_id(struct rio_mport
*port
, u16 destid
, u8 hopcount
, u16 did
)
93 rio_mport_write_config_32(port
, destid
, hopcount
, RIO_DID_CSR
,
94 RIO_SET_DID(port
->sys_size
, did
));
98 * rio_local_set_device_id - Set the base/extended device id for a port
99 * @port: RIO master port
100 * @did: Device ID value to be written
102 * Writes the base/extended device id from a device.
104 static void rio_local_set_device_id(struct rio_mport
*port
, u16 did
)
106 rio_local_write_config_32(port
, RIO_DID_CSR
, RIO_SET_DID(port
->sys_size
,
111 * rio_clear_locks- Release all host locks and signal enumeration complete
112 * @port: Master port to issue transaction
114 * Marks the component tag CSR on each device with the enumeration
115 * complete flag. When complete, it then release the host locks on
116 * each device. Returns 0 on success or %-EINVAL on failure.
118 static int rio_clear_locks(struct rio_mport
*port
)
120 struct rio_dev
*rdev
;
124 /* Release host device id locks */
125 rio_local_write_config_32(port
, RIO_HOST_DID_LOCK_CSR
,
126 port
->host_deviceid
);
127 rio_local_read_config_32(port
, RIO_HOST_DID_LOCK_CSR
, &result
);
128 if ((result
& 0xffff) != 0xffff) {
130 "RIO: badness when releasing host lock on master port, result %8.8x\n",
134 list_for_each_entry(rdev
, &rio_devices
, global_list
) {
135 rio_write_config_32(rdev
, RIO_HOST_DID_LOCK_CSR
,
136 port
->host_deviceid
);
137 rio_read_config_32(rdev
, RIO_HOST_DID_LOCK_CSR
, &result
);
138 if ((result
& 0xffff) != 0xffff) {
140 "RIO: badness when releasing host lock on vid %4.4x did %4.4x\n",
141 rdev
->vid
, rdev
->did
);
145 /* Mark device as discovered and enable master */
146 rio_read_config_32(rdev
,
147 rdev
->phys_efptr
+ RIO_PORT_GEN_CTL_CSR
,
149 result
|= RIO_PORT_GEN_DISCOVERED
| RIO_PORT_GEN_MASTER
;
150 rio_write_config_32(rdev
,
151 rdev
->phys_efptr
+ RIO_PORT_GEN_CTL_CSR
,
159 * rio_enum_host- Set host lock and initialize host destination ID
160 * @port: Master port to issue transaction
162 * Sets the local host master port lock and destination ID register
163 * with the host device ID value. The host device ID value is provided
164 * by the platform. Returns %0 on success or %-1 on failure.
166 static int rio_enum_host(struct rio_mport
*port
)
170 /* Set master port host device id lock */
171 rio_local_write_config_32(port
, RIO_HOST_DID_LOCK_CSR
,
172 port
->host_deviceid
);
174 rio_local_read_config_32(port
, RIO_HOST_DID_LOCK_CSR
, &result
);
175 if ((result
& 0xffff) != port
->host_deviceid
)
178 /* Set master port destid and init destid ctr */
179 rio_local_set_device_id(port
, port
->host_deviceid
);
181 if (next_destid
== port
->host_deviceid
)
188 * rio_device_has_destid- Test if a device contains a destination ID register
189 * @port: Master port to issue transaction
190 * @src_ops: RIO device source operations
191 * @dst_ops: RIO device destination operations
193 * Checks the provided @src_ops and @dst_ops for the necessary transaction
194 * capabilities that indicate whether or not a device will implement a
195 * destination ID register. Returns 1 if true or 0 if false.
197 static int rio_device_has_destid(struct rio_mport
*port
, int src_ops
,
200 u32 mask
= RIO_OPS_READ
| RIO_OPS_WRITE
| RIO_OPS_ATOMIC_TST_SWP
| RIO_OPS_ATOMIC_INC
| RIO_OPS_ATOMIC_DEC
| RIO_OPS_ATOMIC_SET
| RIO_OPS_ATOMIC_CLR
;
202 return !!((src_ops
| dst_ops
) & mask
);
206 * rio_release_dev- Frees a RIO device struct
207 * @dev: LDM device associated with a RIO device struct
209 * Gets the RIO device struct associated a RIO device struct.
210 * The RIO device struct is freed.
212 static void rio_release_dev(struct device
*dev
)
214 struct rio_dev
*rdev
;
216 rdev
= to_rio_dev(dev
);
221 * rio_is_switch- Tests if a RIO device has switch capabilities
224 * Gets the RIO device Processing Element Features register
225 * contents and tests for switch capabilities. Returns 1 if
226 * the device is a switch or 0 if it is not a switch.
227 * The RIO device struct is freed.
229 static int rio_is_switch(struct rio_dev
*rdev
)
231 if (rdev
->pef
& RIO_PEF_SWITCH
)
237 * rio_switch_init - Sets switch operations for a particular vendor switch
239 * @do_enum: Enumeration/Discovery mode flag
241 * Searches the RIO switch ops table for known switch types. If the vid
242 * and did match a switch table entry, then call switch initialization
243 * routine to setup switch-specific routines.
245 static void rio_switch_init(struct rio_dev
*rdev
, int do_enum
)
247 struct rio_switch_ops
*cur
= __start_rio_switch_ops
;
248 struct rio_switch_ops
*end
= __end_rio_switch_ops
;
251 if ((cur
->vid
== rdev
->vid
) && (cur
->did
== rdev
->did
)) {
252 pr_debug("RIO: calling init routine for %s\n",
254 cur
->init_hook(rdev
, do_enum
);
260 if ((cur
>= end
) && (rdev
->pef
& RIO_PEF_STD_RT
)) {
261 pr_debug("RIO: adding STD routing ops for %s\n",
263 rdev
->rswitch
->add_entry
= rio_std_route_add_entry
;
264 rdev
->rswitch
->get_entry
= rio_std_route_get_entry
;
265 rdev
->rswitch
->clr_table
= rio_std_route_clr_table
;
268 if (!rdev
->rswitch
->add_entry
|| !rdev
->rswitch
->get_entry
)
269 printk(KERN_ERR
"RIO: missing routing ops for %s\n",
274 * rio_add_device- Adds a RIO device to the device model
277 * Adds the RIO device to the global device list and adds the RIO
278 * device to the RIO device list. Creates the generic sysfs nodes
281 static int __devinit
rio_add_device(struct rio_dev
*rdev
)
285 err
= device_add(&rdev
->dev
);
289 spin_lock(&rio_global_list_lock
);
290 list_add_tail(&rdev
->global_list
, &rio_devices
);
291 spin_unlock(&rio_global_list_lock
);
293 rio_create_sysfs_dev_files(rdev
);
299 * rio_enable_rx_tx_port - enable input reciever and output transmitter of
301 * @port: Master port associated with the RIO network
302 * @local: local=1 select local port otherwise a far device is reached
303 * @destid: Destination ID of the device to check host bit
304 * @hopcount: Number of hops to reach the target
305 * @port_num: Port (-number on switch) to enable on a far end device
307 * Returns 0 or 1 from on General Control Command and Status Register
310 inline int rio_enable_rx_tx_port(struct rio_mport
*port
,
311 int local
, u16 destid
,
312 u8 hopcount
, u8 port_num
) {
313 #ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS
318 * enable rx input tx output port
320 pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = "
321 "%d, port_num = %d)\n", local
, destid
, hopcount
, port_num
);
323 ext_ftr_ptr
= rio_mport_get_physefb(port
, local
, destid
, hopcount
);
326 rio_local_read_config_32(port
, ext_ftr_ptr
+
327 RIO_PORT_N_CTL_CSR(0),
330 if (rio_mport_read_config_32(port
, destid
, hopcount
,
331 ext_ftr_ptr
+ RIO_PORT_N_CTL_CSR(port_num
), ®val
) < 0)
335 if (regval
& RIO_PORT_N_CTL_P_TYP_SER
) {
337 regval
= regval
| RIO_PORT_N_CTL_EN_RX_SER
338 | RIO_PORT_N_CTL_EN_TX_SER
;
341 regval
= regval
| RIO_PORT_N_CTL_EN_RX_PAR
342 | RIO_PORT_N_CTL_EN_TX_PAR
;
346 rio_local_write_config_32(port
, ext_ftr_ptr
+
347 RIO_PORT_N_CTL_CSR(0), regval
);
349 if (rio_mport_write_config_32(port
, destid
, hopcount
,
350 ext_ftr_ptr
+ RIO_PORT_N_CTL_CSR(port_num
), regval
) < 0)
358 * rio_setup_device- Allocates and sets up a RIO device
360 * @port: Master port to send transactions
361 * @destid: Current destination ID
362 * @hopcount: Current hopcount
363 * @do_enum: Enumeration/Discovery mode flag
365 * Allocates a RIO device and configures fields based on configuration
366 * space contents. If device has a destination ID register, a destination
367 * ID is either assigned in enumeration mode or read from configuration
368 * space in discovery mode. If the device has switch capabilities, then
369 * a switch is allocated and configured appropriately. Returns a pointer
370 * to a RIO device on success or NULL on failure.
373 static struct rio_dev __devinit
*rio_setup_device(struct rio_net
*net
,
374 struct rio_mport
*port
, u16 destid
,
375 u8 hopcount
, int do_enum
)
378 struct rio_dev
*rdev
;
379 struct rio_switch
*rswitch
= NULL
;
382 rdev
= kzalloc(sizeof(struct rio_dev
), GFP_KERNEL
);
387 rio_mport_read_config_32(port
, destid
, hopcount
, RIO_DEV_ID_CAR
,
389 rdev
->did
= result
>> 16;
390 rdev
->vid
= result
& 0xffff;
391 rio_mport_read_config_32(port
, destid
, hopcount
, RIO_DEV_INFO_CAR
,
393 rio_mport_read_config_32(port
, destid
, hopcount
, RIO_ASM_ID_CAR
,
395 rdev
->asm_did
= result
>> 16;
396 rdev
->asm_vid
= result
& 0xffff;
397 rio_mport_read_config_32(port
, destid
, hopcount
, RIO_ASM_INFO_CAR
,
399 rdev
->asm_rev
= result
>> 16;
400 rio_mport_read_config_32(port
, destid
, hopcount
, RIO_PEF_CAR
,
402 if (rdev
->pef
& RIO_PEF_EXT_FEATURES
) {
403 rdev
->efptr
= result
& 0xffff;
404 rdev
->phys_efptr
= rio_mport_get_physefb(port
, 0, destid
,
407 rdev
->em_efptr
= rio_mport_get_feature(port
, 0, destid
,
408 hopcount
, RIO_EFB_ERR_MGMNT
);
411 if (rdev
->pef
& (RIO_PEF_SWITCH
| RIO_PEF_MULTIPORT
)) {
412 rio_mport_read_config_32(port
, destid
, hopcount
,
413 RIO_SWP_INFO_CAR
, &rdev
->swpinfo
);
416 rio_mport_read_config_32(port
, destid
, hopcount
, RIO_SRC_OPS_CAR
,
418 rio_mport_read_config_32(port
, destid
, hopcount
, RIO_DST_OPS_CAR
,
422 /* Assign component tag to device */
423 if (next_comptag
>= 0x10000) {
424 pr_err("RIO: Component Tag Counter Overflow\n");
427 rio_mport_write_config_32(port
, destid
, hopcount
,
428 RIO_COMPONENT_TAG_CSR
, next_comptag
);
429 rdev
->comp_tag
= next_comptag
++;
432 if (rio_device_has_destid(port
, rdev
->src_ops
, rdev
->dst_ops
)) {
434 rio_set_device_id(port
, destid
, hopcount
, next_destid
);
435 rdev
->destid
= next_destid
++;
436 if (next_destid
== port
->host_deviceid
)
439 rdev
->destid
= rio_get_device_id(port
, destid
, hopcount
);
441 rdev
->hopcount
= 0xff;
443 /* Switch device has an associated destID which
444 * will be adjusted later
446 rdev
->destid
= destid
;
447 rdev
->hopcount
= hopcount
;
450 /* If a PE has both switch and other functions, show it as a switch */
451 if (rio_is_switch(rdev
)) {
452 rswitch
= kzalloc(sizeof(*rswitch
) +
453 RIO_GET_TOTAL_PORTS(rdev
->swpinfo
) *
454 sizeof(rswitch
->nextdev
[0]),
458 rswitch
->switchid
= next_switchid
;
459 rswitch
->port_ok
= 0;
460 rswitch
->route_table
= kzalloc(sizeof(u8
)*
461 RIO_MAX_ROUTE_ENTRIES(port
->sys_size
),
463 if (!rswitch
->route_table
)
465 /* Initialize switch route table */
466 for (rdid
= 0; rdid
< RIO_MAX_ROUTE_ENTRIES(port
->sys_size
);
468 rswitch
->route_table
[rdid
] = RIO_INVALID_ROUTE
;
469 rdev
->rswitch
= rswitch
;
470 rswitch
->rdev
= rdev
;
471 dev_set_name(&rdev
->dev
, "%02x:s:%04x", rdev
->net
->id
,
472 rdev
->rswitch
->switchid
);
473 rio_switch_init(rdev
, do_enum
);
475 if (do_enum
&& rdev
->rswitch
->clr_table
)
476 rdev
->rswitch
->clr_table(port
, destid
, hopcount
,
479 list_add_tail(&rswitch
->node
, &rio_switches
);
483 /*Enable Input Output Port (transmitter reviever)*/
484 rio_enable_rx_tx_port(port
, 0, destid
, hopcount
, 0);
486 dev_set_name(&rdev
->dev
, "%02x:e:%04x", rdev
->net
->id
,
490 rdev
->dev
.bus
= &rio_bus_type
;
491 rdev
->dev
.parent
= &rio_bus
;
493 device_initialize(&rdev
->dev
);
494 rdev
->dev
.release
= rio_release_dev
;
497 rdev
->dma_mask
= DMA_BIT_MASK(32);
498 rdev
->dev
.dma_mask
= &rdev
->dma_mask
;
499 rdev
->dev
.coherent_dma_mask
= DMA_BIT_MASK(32);
501 if ((rdev
->pef
& RIO_PEF_INB_DOORBELL
) &&
502 (rdev
->dst_ops
& RIO_DST_OPS_DOORBELL
))
503 rio_init_dbell_res(&rdev
->riores
[RIO_DOORBELL_RESOURCE
],
506 ret
= rio_add_device(rdev
);
514 kfree(rswitch
->route_table
);
522 * rio_sport_is_active- Tests if a switch port has an active connection.
523 * @port: Master port to send transaction
524 * @destid: Associated destination ID for switch
525 * @hopcount: Hopcount to reach switch
526 * @sport: Switch port number
528 * Reads the port error status CSR for a particular switch port to
529 * determine if the port has an active link. Returns
530 * %RIO_PORT_N_ERR_STS_PORT_OK if the port is active or %0 if it is
534 rio_sport_is_active(struct rio_mport
*port
, u16 destid
, u8 hopcount
, int sport
)
539 ext_ftr_ptr
= rio_mport_get_efb(port
, 0, destid
, hopcount
, 0);
541 while (ext_ftr_ptr
) {
542 rio_mport_read_config_32(port
, destid
, hopcount
,
543 ext_ftr_ptr
, &result
);
544 result
= RIO_GET_BLOCK_ID(result
);
545 if ((result
== RIO_EFB_SER_EP_FREE_ID
) ||
546 (result
== RIO_EFB_SER_EP_FREE_ID_V13P
) ||
547 (result
== RIO_EFB_SER_EP_FREC_ID
))
550 ext_ftr_ptr
= rio_mport_get_efb(port
, 0, destid
, hopcount
,
555 rio_mport_read_config_32(port
, destid
, hopcount
,
557 RIO_PORT_N_ERR_STS_CSR(sport
),
560 return result
& RIO_PORT_N_ERR_STS_PORT_OK
;
564 * rio_lock_device - Acquires host device lock for specified device
565 * @port: Master port to send transaction
566 * @destid: Destination ID for device/switch
567 * @hopcount: Hopcount to reach switch
568 * @wait_ms: Max wait time in msec (0 = no timeout)
570 * Attepts to acquire host device lock for specified device
571 * Returns 0 if device lock acquired or EINVAL if timeout expires.
574 rio_lock_device(struct rio_mport
*port
, u16 destid
, u8 hopcount
, int wait_ms
)
579 /* Attempt to acquire device lock */
580 rio_mport_write_config_32(port
, destid
, hopcount
,
581 RIO_HOST_DID_LOCK_CSR
, port
->host_deviceid
);
582 rio_mport_read_config_32(port
, destid
, hopcount
,
583 RIO_HOST_DID_LOCK_CSR
, &result
);
585 while (result
!= port
->host_deviceid
) {
586 if (wait_ms
!= 0 && tcnt
== wait_ms
) {
587 pr_debug("RIO: timeout when locking device %x:%x\n",
595 /* Try to acquire device lock again */
596 rio_mport_write_config_32(port
, destid
,
598 RIO_HOST_DID_LOCK_CSR
,
599 port
->host_deviceid
);
600 rio_mport_read_config_32(port
, destid
,
602 RIO_HOST_DID_LOCK_CSR
, &result
);
609 * rio_unlock_device - Releases host device lock for specified device
610 * @port: Master port to send transaction
611 * @destid: Destination ID for device/switch
612 * @hopcount: Hopcount to reach switch
614 * Returns 0 if device lock released or EINVAL if fails.
617 rio_unlock_device(struct rio_mport
*port
, u16 destid
, u8 hopcount
)
621 /* Release device lock */
622 rio_mport_write_config_32(port
, destid
,
624 RIO_HOST_DID_LOCK_CSR
,
625 port
->host_deviceid
);
626 rio_mport_read_config_32(port
, destid
, hopcount
,
627 RIO_HOST_DID_LOCK_CSR
, &result
);
628 if ((result
& 0xffff) != 0xffff) {
629 pr_debug("RIO: badness when releasing device lock %x:%x\n",
638 * rio_route_add_entry- Add a route entry to a switch routing table
640 * @table: Routing table ID
641 * @route_destid: Destination ID to be routed
642 * @route_port: Port number to be routed
643 * @lock: lock switch device flag
645 * Calls the switch specific add_entry() method to add a route entry
646 * on a switch. The route table can be specified using the @table
647 * argument if a switch has per port routing tables or the normal
648 * use is to specific all tables (or the global table) by passing
649 * %RIO_GLOBAL_TABLE in @table. Returns %0 on success or %-EINVAL
653 rio_route_add_entry(struct rio_dev
*rdev
,
654 u16 table
, u16 route_destid
, u8 route_port
, int lock
)
659 rc
= rio_lock_device(rdev
->net
->hport
, rdev
->destid
,
660 rdev
->hopcount
, 1000);
665 rc
= rdev
->rswitch
->add_entry(rdev
->net
->hport
, rdev
->destid
,
666 rdev
->hopcount
, table
,
667 route_destid
, route_port
);
669 rio_unlock_device(rdev
->net
->hport
, rdev
->destid
,
676 * rio_route_get_entry- Read a route entry in a switch routing table
678 * @table: Routing table ID
679 * @route_destid: Destination ID to be routed
680 * @route_port: Pointer to read port number into
681 * @lock: lock switch device flag
683 * Calls the switch specific get_entry() method to read a route entry
684 * in a switch. The route table can be specified using the @table
685 * argument if a switch has per port routing tables or the normal
686 * use is to specific all tables (or the global table) by passing
687 * %RIO_GLOBAL_TABLE in @table. Returns %0 on success or %-EINVAL
691 rio_route_get_entry(struct rio_dev
*rdev
, u16 table
,
692 u16 route_destid
, u8
*route_port
, int lock
)
697 rc
= rio_lock_device(rdev
->net
->hport
, rdev
->destid
,
698 rdev
->hopcount
, 1000);
703 rc
= rdev
->rswitch
->get_entry(rdev
->net
->hport
, rdev
->destid
,
704 rdev
->hopcount
, table
,
705 route_destid
, route_port
);
707 rio_unlock_device(rdev
->net
->hport
, rdev
->destid
,
714 * rio_get_host_deviceid_lock- Reads the Host Device ID Lock CSR on a device
715 * @port: Master port to send transaction
716 * @hopcount: Number of hops to the device
718 * Used during enumeration to read the Host Device ID Lock CSR on a
719 * RIO device. Returns the value of the lock register.
721 static u16
rio_get_host_deviceid_lock(struct rio_mport
*port
, u8 hopcount
)
725 rio_mport_read_config_32(port
, RIO_ANY_DESTID(port
->sys_size
), hopcount
,
726 RIO_HOST_DID_LOCK_CSR
, &result
);
728 return (u16
) (result
& 0xffff);
732 * rio_enum_peer- Recursively enumerate a RIO network through a master port
733 * @net: RIO network being enumerated
734 * @port: Master port to send transactions
735 * @hopcount: Number of hops into the network
736 * @prev: Previous RIO device connected to the enumerated one
737 * @prev_port: Port on previous RIO device
739 * Recursively enumerates a RIO network. Transactions are sent via the
740 * master port passed in @port.
742 static int __devinit
rio_enum_peer(struct rio_net
*net
, struct rio_mport
*port
,
743 u8 hopcount
, struct rio_dev
*prev
, int prev_port
)
749 struct rio_dev
*rdev
;
754 if (rio_mport_chk_dev_access(port
,
755 RIO_ANY_DESTID(port
->sys_size
), hopcount
)) {
756 pr_debug("RIO: device access check failed\n");
760 if (rio_get_host_deviceid_lock(port
, hopcount
) == port
->host_deviceid
) {
761 pr_debug("RIO: PE already discovered by this host\n");
763 * Already discovered by this host. Add it as another
764 * link to the existing device.
766 rio_mport_read_config_32(port
, RIO_ANY_DESTID(port
->sys_size
),
767 hopcount
, RIO_COMPONENT_TAG_CSR
, ®val
);
770 rdev
= rio_get_comptag((regval
& 0xffff), NULL
);
772 if (rdev
&& prev
&& rio_is_switch(prev
)) {
773 pr_debug("RIO: redundant path to %s\n",
775 prev
->rswitch
->nextdev
[prev_port
] = rdev
;
782 /* Attempt to acquire device lock */
783 rio_mport_write_config_32(port
, RIO_ANY_DESTID(port
->sys_size
),
785 RIO_HOST_DID_LOCK_CSR
, port
->host_deviceid
);
786 while ((tmp
= rio_get_host_deviceid_lock(port
, hopcount
))
787 < port
->host_deviceid
) {
790 /* Attempt to acquire device lock again */
791 rio_mport_write_config_32(port
, RIO_ANY_DESTID(port
->sys_size
),
793 RIO_HOST_DID_LOCK_CSR
,
794 port
->host_deviceid
);
797 if (rio_get_host_deviceid_lock(port
, hopcount
) > port
->host_deviceid
) {
799 "RIO: PE locked by a higher priority host...retreating\n");
803 /* Setup new RIO device */
804 rdev
= rio_setup_device(net
, port
, RIO_ANY_DESTID(port
->sys_size
),
807 /* Add device to the global and bus/net specific list. */
808 list_add_tail(&rdev
->net_list
, &net
->devices
);
810 if (prev
&& rio_is_switch(prev
))
811 prev
->rswitch
->nextdev
[prev_port
] = rdev
;
815 if (rio_is_switch(rdev
)) {
817 sw_inport
= RIO_GET_PORT_NUM(rdev
->swpinfo
);
818 rio_route_add_entry(rdev
, RIO_GLOBAL_TABLE
,
819 port
->host_deviceid
, sw_inport
, 0);
820 rdev
->rswitch
->route_table
[port
->host_deviceid
] = sw_inport
;
822 for (destid
= 0; destid
< next_destid
; destid
++) {
823 if (destid
== port
->host_deviceid
)
825 rio_route_add_entry(rdev
, RIO_GLOBAL_TABLE
,
826 destid
, sw_inport
, 0);
827 rdev
->rswitch
->route_table
[destid
] = sw_inport
;
831 "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n",
832 rio_name(rdev
), rdev
->vid
, rdev
->did
,
833 RIO_GET_TOTAL_PORTS(rdev
->swpinfo
));
834 sw_destid
= next_destid
;
836 port_num
< RIO_GET_TOTAL_PORTS(rdev
->swpinfo
);
838 /*Enable Input Output Port (transmitter reviever)*/
839 rio_enable_rx_tx_port(port
, 0,
840 RIO_ANY_DESTID(port
->sys_size
),
843 if (sw_inport
== port_num
) {
844 rdev
->rswitch
->port_ok
|= (1 << port_num
);
848 cur_destid
= next_destid
;
850 if (rio_sport_is_active
851 (port
, RIO_ANY_DESTID(port
->sys_size
), hopcount
,
854 "RIO: scanning device on port %d\n",
856 rdev
->rswitch
->port_ok
|= (1 << port_num
);
857 rio_route_add_entry(rdev
, RIO_GLOBAL_TABLE
,
858 RIO_ANY_DESTID(port
->sys_size
),
861 if (rio_enum_peer(net
, port
, hopcount
+ 1,
865 /* Update routing tables */
866 if (next_destid
> cur_destid
) {
867 for (destid
= cur_destid
;
868 destid
< next_destid
; destid
++) {
869 if (destid
== port
->host_deviceid
)
871 rio_route_add_entry(rdev
,
877 route_table
[destid
] =
882 /* If switch supports Error Management,
883 * set PORT_LOCKOUT bit for unused port
886 rio_set_port_lockout(rdev
, port_num
, 1);
888 rdev
->rswitch
->port_ok
&= ~(1 << port_num
);
892 /* Direct Port-write messages to the enumeratiing host */
893 if ((rdev
->src_ops
& RIO_SRC_OPS_PORT_WRITE
) &&
895 rio_write_config_32(rdev
,
896 rdev
->em_efptr
+ RIO_EM_PW_TGT_DEVID
,
897 (port
->host_deviceid
<< 16) |
898 (port
->sys_size
<< 15));
903 /* Check for empty switch */
904 if (next_destid
== sw_destid
) {
906 if (next_destid
== port
->host_deviceid
)
910 rdev
->destid
= sw_destid
;
912 pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n",
913 rio_name(rdev
), rdev
->vid
, rdev
->did
);
919 * rio_enum_complete- Tests if enumeration of a network is complete
920 * @port: Master port to send transaction
922 * Tests the Component Tag CSR for non-zero value (enumeration
923 * complete flag). Return %1 if enumeration is complete or %0 if
924 * enumeration is incomplete.
926 static int rio_enum_complete(struct rio_mport
*port
)
930 rio_local_read_config_32(port
, port
->phys_efptr
+ RIO_PORT_GEN_CTL_CSR
,
932 return (regval
& RIO_PORT_GEN_MASTER
) ? 1 : 0;
936 * rio_disc_peer- Recursively discovers a RIO network through a master port
937 * @net: RIO network being discovered
938 * @port: Master port to send transactions
939 * @destid: Current destination ID in network
940 * @hopcount: Number of hops into the network
942 * Recursively discovers a RIO network. Transactions are sent via the
943 * master port passed in @port.
946 rio_disc_peer(struct rio_net
*net
, struct rio_mport
*port
, u16 destid
,
949 u8 port_num
, route_port
;
950 struct rio_dev
*rdev
;
953 /* Setup new RIO device */
954 if ((rdev
= rio_setup_device(net
, port
, destid
, hopcount
, 0))) {
955 /* Add device to the global and bus/net specific list. */
956 list_add_tail(&rdev
->net_list
, &net
->devices
);
960 if (rio_is_switch(rdev
)) {
963 /* Associated destid is how we accessed this switch */
964 rdev
->destid
= destid
;
967 "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n",
968 rio_name(rdev
), rdev
->vid
, rdev
->did
,
969 RIO_GET_TOTAL_PORTS(rdev
->swpinfo
));
971 port_num
< RIO_GET_TOTAL_PORTS(rdev
->swpinfo
);
973 if (RIO_GET_PORT_NUM(rdev
->swpinfo
) == port_num
)
976 if (rio_sport_is_active
977 (port
, destid
, hopcount
, port_num
)) {
979 "RIO: scanning device on port %d\n",
982 rio_lock_device(port
, destid
, hopcount
, 1000);
985 ndestid
< RIO_ANY_DESTID(port
->sys_size
);
987 rio_route_get_entry(rdev
,
991 if (route_port
== port_num
)
995 if (ndestid
== RIO_ANY_DESTID(port
->sys_size
))
997 rio_unlock_device(port
, destid
, hopcount
);
999 (net
, port
, ndestid
, hopcount
+ 1) < 0)
1004 pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n",
1005 rio_name(rdev
), rdev
->vid
, rdev
->did
);
1011 * rio_mport_is_active- Tests if master port link is active
1012 * @port: Master port to test
1014 * Reads the port error status CSR for the master port to
1015 * determine if the port has an active link. Returns
1016 * %RIO_PORT_N_ERR_STS_PORT_OK if the master port is active
1017 * or %0 if it is inactive.
1019 static int rio_mport_is_active(struct rio_mport
*port
)
1023 int *entry
= rio_mport_phys_table
;
1027 rio_mport_get_feature(port
, 1, 0, 0, *entry
)))
1029 } while (*++entry
>= 0);
1032 rio_local_read_config_32(port
,
1034 RIO_PORT_N_ERR_STS_CSR(port
->index
),
1037 return result
& RIO_PORT_N_ERR_STS_PORT_OK
;
1041 * rio_alloc_net- Allocate and configure a new RIO network
1042 * @port: Master port associated with the RIO network
1044 * Allocates a RIO network structure, initializes per-network
1045 * list heads, and adds the associated master port to the
1046 * network list of associated master ports. Returns a
1047 * RIO network pointer on success or %NULL on failure.
1049 static struct rio_net __devinit
*rio_alloc_net(struct rio_mport
*port
)
1051 struct rio_net
*net
;
1053 net
= kzalloc(sizeof(struct rio_net
), GFP_KERNEL
);
1055 INIT_LIST_HEAD(&net
->node
);
1056 INIT_LIST_HEAD(&net
->devices
);
1057 INIT_LIST_HEAD(&net
->mports
);
1058 list_add_tail(&port
->nnode
, &net
->mports
);
1060 net
->id
= next_net
++;
1066 * rio_update_route_tables- Updates route tables in switches
1067 * @port: Master port associated with the RIO network
1069 * For each enumerated device, ensure that each switch in a system
1070 * has correct routing entries. Add routes for devices that where
1071 * unknown dirung the first enumeration pass through the switch.
1073 static void rio_update_route_tables(struct rio_mport
*port
)
1075 struct rio_dev
*rdev
;
1076 struct rio_switch
*rswitch
;
1080 list_for_each_entry(rdev
, &rio_devices
, global_list
) {
1082 destid
= rdev
->destid
;
1084 list_for_each_entry(rswitch
, &rio_switches
, node
) {
1086 if (rio_is_switch(rdev
) && (rdev
->rswitch
== rswitch
))
1089 if (RIO_INVALID_ROUTE
== rswitch
->route_table
[destid
]) {
1090 /* Skip if destid ends in empty switch*/
1091 if (rswitch
->rdev
->destid
== destid
)
1094 sport
= RIO_GET_PORT_NUM(rswitch
->rdev
->swpinfo
);
1096 if (rswitch
->add_entry
) {
1097 rio_route_add_entry(rswitch
->rdev
,
1098 RIO_GLOBAL_TABLE
, destid
,
1100 rswitch
->route_table
[destid
] = sport
;
1108 * rio_init_em - Initializes RIO Error Management (for switches)
1111 * For each enumerated switch, call device-specific error management
1112 * initialization routine (if supplied by the switch driver).
1114 static void rio_init_em(struct rio_dev
*rdev
)
1116 if (rio_is_switch(rdev
) && (rdev
->em_efptr
) &&
1117 (rdev
->rswitch
->em_init
)) {
1118 rdev
->rswitch
->em_init(rdev
);
1123 * rio_pw_enable - Enables/disables port-write handling by a master port
1124 * @port: Master port associated with port-write handling
1125 * @enable: 1=enable, 0=disable
1127 static void rio_pw_enable(struct rio_mport
*port
, int enable
)
1129 if (port
->ops
->pwenable
)
1130 port
->ops
->pwenable(port
, enable
);
1134 * rio_enum_mport- Start enumeration through a master port
1135 * @mport: Master port to send transactions
1137 * Starts the enumeration process. If somebody has enumerated our
1138 * master port device, then give up. If not and we have an active
1139 * link, then start recursive peer enumeration. Returns %0 if
1140 * enumeration succeeds or %-EBUSY if enumeration fails.
1142 int __devinit
rio_enum_mport(struct rio_mport
*mport
)
1144 struct rio_net
*net
= NULL
;
1147 printk(KERN_INFO
"RIO: enumerate master port %d, %s\n", mport
->id
,
1149 /* If somebody else enumerated our master port device, bail. */
1150 if (rio_enum_host(mport
) < 0) {
1152 "RIO: master port %d device has been enumerated by a remote host\n",
1158 /* If master port has an active link, allocate net and enum peers */
1159 if (rio_mport_is_active(mport
)) {
1160 if (!(net
= rio_alloc_net(mport
))) {
1161 printk(KERN_ERR
"RIO: failed to allocate new net\n");
1166 /* Enable Input Output Port (transmitter reviever) */
1167 rio_enable_rx_tx_port(mport
, 1, 0, 0, 0);
1169 /* Set component tag for host */
1170 rio_local_write_config_32(mport
, RIO_COMPONENT_TAG_CSR
,
1173 if (rio_enum_peer(net
, mport
, 0, NULL
, 0) < 0) {
1174 /* A higher priority host won enumeration, bail. */
1176 "RIO: master port %d device has lost enumeration to a remote host\n",
1178 rio_clear_locks(mport
);
1182 rio_update_route_tables(mport
);
1183 rio_clear_locks(mport
);
1184 rio_pw_enable(mport
, 1);
1186 printk(KERN_INFO
"RIO: master port %d link inactive\n",
1196 * rio_build_route_tables- Generate route tables from switch route entries
1198 * For each switch device, generate a route table by copying existing
1199 * route entries from the switch.
1201 static void rio_build_route_tables(void)
1203 struct rio_dev
*rdev
;
1207 list_for_each_entry(rdev
, &rio_devices
, global_list
)
1208 if (rio_is_switch(rdev
)) {
1209 rio_lock_device(rdev
->net
->hport
, rdev
->destid
,
1210 rdev
->hopcount
, 1000);
1212 i
< RIO_MAX_ROUTE_ENTRIES(rdev
->net
->hport
->sys_size
);
1214 if (rio_route_get_entry(rdev
,
1215 RIO_GLOBAL_TABLE
, i
, &sport
, 0) < 0)
1217 rdev
->rswitch
->route_table
[i
] = sport
;
1220 rio_unlock_device(rdev
->net
->hport
,
1227 * rio_enum_timeout- Signal that enumeration timed out
1228 * @data: Address of timeout flag.
1230 * When the enumeration complete timer expires, set a flag that
1231 * signals to the discovery process that enumeration did not
1232 * complete in a sane amount of time.
1234 static void rio_enum_timeout(unsigned long data
)
1236 /* Enumeration timed out, set flag */
1241 * rio_disc_mport- Start discovery through a master port
1242 * @mport: Master port to send transactions
1244 * Starts the discovery process. If we have an active link,
1245 * then wait for the signal that enumeration is complete.
1246 * When enumeration completion is signaled, start recursive
1247 * peer discovery. Returns %0 if discovery succeeds or %-EBUSY
1250 int __devinit
rio_disc_mport(struct rio_mport
*mport
)
1252 struct rio_net
*net
= NULL
;
1253 int enum_timeout_flag
= 0;
1255 printk(KERN_INFO
"RIO: discover master port %d, %s\n", mport
->id
,
1258 /* If master port has an active link, allocate net and discover peers */
1259 if (rio_mport_is_active(mport
)) {
1260 if (!(net
= rio_alloc_net(mport
))) {
1261 printk(KERN_ERR
"RIO: Failed to allocate new net\n");
1265 pr_debug("RIO: wait for enumeration complete...");
1267 rio_enum_timer
.expires
=
1268 jiffies
+ CONFIG_RAPIDIO_DISC_TIMEOUT
* HZ
;
1269 rio_enum_timer
.data
= (unsigned long)&enum_timeout_flag
;
1270 add_timer(&rio_enum_timer
);
1271 while (!rio_enum_complete(mport
)) {
1273 if (enum_timeout_flag
) {
1274 del_timer_sync(&rio_enum_timer
);
1278 del_timer_sync(&rio_enum_timer
);
1282 /* Read DestID assigned by enumerator */
1283 rio_local_read_config_32(mport
, RIO_DID_CSR
,
1284 &mport
->host_deviceid
);
1285 mport
->host_deviceid
= RIO_GET_DID(mport
->sys_size
,
1286 mport
->host_deviceid
);
1288 if (rio_disc_peer(net
, mport
, RIO_ANY_DESTID(mport
->sys_size
),
1291 "RIO: master port %d device has failed discovery\n",
1296 rio_build_route_tables();
1302 pr_debug("timeout\n");