2 * Char device interface.
4 * Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 #ifndef _LINUX_FIREWIRE_CDEV_H
22 #define _LINUX_FIREWIRE_CDEV_H
24 #include <linux/ioctl.h>
25 #include <linux/types.h>
26 #include <linux/firewire-constants.h>
28 #define FW_CDEV_EVENT_BUS_RESET 0x00
29 #define FW_CDEV_EVENT_RESPONSE 0x01
30 #define FW_CDEV_EVENT_REQUEST 0x02
31 #define FW_CDEV_EVENT_ISO_INTERRUPT 0x03
32 #define FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED 0x04
33 #define FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED 0x05
36 * struct fw_cdev_event_common - Common part of all fw_cdev_event_ types
37 * @closure: For arbitrary use by userspace
38 * @type: Discriminates the fw_cdev_event_ types
40 * This struct may be used to access generic members of all fw_cdev_event_
41 * types regardless of the specific type.
43 * Data passed in the @closure field for a request will be returned in the
44 * corresponding event. It is big enough to hold a pointer on all platforms.
45 * The ioctl used to set @closure depends on the @type of event.
47 struct fw_cdev_event_common
{
53 * struct fw_cdev_event_bus_reset - Sent when a bus reset occurred
54 * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_GET_INFO ioctl
55 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_BUS_RESET
56 * @node_id: New node ID of this node
57 * @local_node_id: Node ID of the local node, i.e. of the controller
58 * @bm_node_id: Node ID of the bus manager
59 * @irm_node_id: Node ID of the iso resource manager
60 * @root_node_id: Node ID of the root node
61 * @generation: New bus generation
63 * This event is sent when the bus the device belongs to goes through a bus
64 * reset. It provides information about the new bus configuration, such as
65 * new node ID for this device, new root ID, and others.
67 struct fw_cdev_event_bus_reset
{
79 * struct fw_cdev_event_response - Sent when a response packet was received
80 * @closure: See &fw_cdev_event_common;
81 * set by %FW_CDEV_IOC_SEND_REQUEST ioctl
82 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_RESPONSE
83 * @rcode: Response code returned by the remote node
84 * @length: Data length, i.e. the response's payload size in bytes
85 * @data: Payload data, if any
87 * This event is sent when the stack receives a response to an outgoing request
88 * sent by %FW_CDEV_IOC_SEND_REQUEST ioctl. The payload data for responses
89 * carrying data (read and lock responses) follows immediately and can be
90 * accessed through the @data field.
92 struct fw_cdev_event_response
{
101 * struct fw_cdev_event_request - Sent on incoming request to an address region
102 * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_ALLOCATE ioctl
103 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_REQUEST
104 * @tcode: Transaction code of the incoming request
105 * @offset: The offset into the 48-bit per-node address space
106 * @handle: Reference to the kernel-side pending request
107 * @length: Data length, i.e. the request's payload size in bytes
108 * @data: Incoming data, if any
110 * This event is sent when the stack receives an incoming request to an address
111 * region registered using the %FW_CDEV_IOC_ALLOCATE ioctl. The request is
112 * guaranteed to be completely contained in the specified region. Userspace is
113 * responsible for sending the response by %FW_CDEV_IOC_SEND_RESPONSE ioctl,
114 * using the same @handle.
116 * The payload data for requests carrying data (write and lock requests)
117 * follows immediately and can be accessed through the @data field.
119 struct fw_cdev_event_request
{
130 * struct fw_cdev_event_iso_interrupt - Sent when an iso packet was completed
131 * @closure: See &fw_cdev_event_common;
132 * set by %FW_CDEV_CREATE_ISO_CONTEXT ioctl
133 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_ISO_INTERRUPT
134 * @cycle: Cycle counter of the interrupt packet
135 * @header_length: Total length of following headers, in bytes
136 * @header: Stripped headers, if any
138 * This event is sent when the controller has completed an &fw_cdev_iso_packet
139 * with the %FW_CDEV_ISO_INTERRUPT bit set. In the receive case, the headers
140 * stripped of all packets up until and including the interrupt packet are
141 * returned in the @header field. The amount of header data per packet is as
142 * specified at iso context creation by &fw_cdev_create_iso_context.header_size.
144 * In version 1 of this ABI, header data consisted of the 1394 isochronous
145 * packet header, followed by quadlets from the packet payload if
146 * &fw_cdev_create_iso_context.header_size > 4.
148 * In version 2 of this ABI, header data consist of the 1394 isochronous
149 * packet header, followed by a timestamp quadlet if
150 * &fw_cdev_create_iso_context.header_size > 4, followed by quadlets from the
151 * packet payload if &fw_cdev_create_iso_context.header_size > 8.
153 * Behaviour of ver. 1 of this ABI is no longer available since ABI ver. 2.
155 * Format of 1394 iso packet header: 16 bits len, 2 bits tag, 6 bits channel,
156 * 4 bits tcode, 4 bits sy, in big endian byte order. Format of timestamp:
157 * 16 bits invalid, 3 bits cycleSeconds, 13 bits cycleCount, in big endian byte
160 struct fw_cdev_event_iso_interrupt
{
169 * struct fw_cdev_event_iso_resource - Iso resources were allocated or freed
170 * @closure: See &fw_cdev_event_common;
171 * set by %FW_CDEV_IOC_(DE)ALLOCATE_ISO_RESOURCE(_ONCE) ioctl
172 * @type: %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED or
173 * %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED
174 * @handle: Reference by which an allocated resource can be deallocated
175 * @channel: Isochronous channel which was (de)allocated, if any
176 * @bandwidth: Bandwidth allocation units which were (de)allocated, if any
177 * @channels_available: Last known availability of channels
178 * @bandwidth_available: Last known availability of bandwidth
180 * An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED event is sent after an isochronous
181 * resource was allocated at the IRM. The client has to check @channel and
182 * @bandwidth for whether the allocation actually succeeded.
184 * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event is sent after an isochronous
185 * resource was deallocated at the IRM. It is also sent when automatic
186 * reallocation after a bus reset failed.
188 * @channel is <0 if no channel was (de)allocated or if reallocation failed.
189 * @bandwidth is 0 if no bandwidth was (de)allocated or if reallocation failed.
191 struct fw_cdev_event_iso_resource
{
200 * union fw_cdev_event - Convenience union of fw_cdev_event_ types
201 * @common: Valid for all types
202 * @bus_reset: Valid if @common.type == %FW_CDEV_EVENT_BUS_RESET
203 * @response: Valid if @common.type == %FW_CDEV_EVENT_RESPONSE
204 * @request: Valid if @common.type == %FW_CDEV_EVENT_REQUEST
205 * @iso_interrupt: Valid if @common.type == %FW_CDEV_EVENT_ISO_INTERRUPT
206 * @iso_resource: Valid if @common.type ==
207 * %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED or
208 * %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED
210 * Convenience union for userspace use. Events could be read(2) into an
211 * appropriately aligned char buffer and then cast to this union for further
212 * processing. Note that for a request, response or iso_interrupt event,
213 * the data[] or header[] may make the size of the full event larger than
214 * sizeof(union fw_cdev_event). Also note that if you attempt to read(2)
215 * an event into a buffer that is not large enough for it, the data that does
216 * not fit will be discarded so that the next read(2) will return a new event.
218 union fw_cdev_event
{
219 struct fw_cdev_event_common common
;
220 struct fw_cdev_event_bus_reset bus_reset
;
221 struct fw_cdev_event_response response
;
222 struct fw_cdev_event_request request
;
223 struct fw_cdev_event_iso_interrupt iso_interrupt
;
224 struct fw_cdev_event_iso_resource iso_resource
;
227 /* available since kernel version 2.6.22 */
228 #define FW_CDEV_IOC_GET_INFO _IOWR('#', 0x00, struct fw_cdev_get_info)
229 #define FW_CDEV_IOC_SEND_REQUEST _IOW('#', 0x01, struct fw_cdev_send_request)
230 #define FW_CDEV_IOC_ALLOCATE _IOWR('#', 0x02, struct fw_cdev_allocate)
231 #define FW_CDEV_IOC_DEALLOCATE _IOW('#', 0x03, struct fw_cdev_deallocate)
232 #define FW_CDEV_IOC_SEND_RESPONSE _IOW('#', 0x04, struct fw_cdev_send_response)
233 #define FW_CDEV_IOC_INITIATE_BUS_RESET _IOW('#', 0x05, struct fw_cdev_initiate_bus_reset)
234 #define FW_CDEV_IOC_ADD_DESCRIPTOR _IOWR('#', 0x06, struct fw_cdev_add_descriptor)
235 #define FW_CDEV_IOC_REMOVE_DESCRIPTOR _IOW('#', 0x07, struct fw_cdev_remove_descriptor)
236 #define FW_CDEV_IOC_CREATE_ISO_CONTEXT _IOWR('#', 0x08, struct fw_cdev_create_iso_context)
237 #define FW_CDEV_IOC_QUEUE_ISO _IOWR('#', 0x09, struct fw_cdev_queue_iso)
238 #define FW_CDEV_IOC_START_ISO _IOW('#', 0x0a, struct fw_cdev_start_iso)
239 #define FW_CDEV_IOC_STOP_ISO _IOW('#', 0x0b, struct fw_cdev_stop_iso)
241 /* available since kernel version 2.6.24 */
242 #define FW_CDEV_IOC_GET_CYCLE_TIMER _IOR('#', 0x0c, struct fw_cdev_get_cycle_timer)
244 /* available since kernel version 2.6.30 */
245 #define FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE _IOWR('#', 0x0d, struct fw_cdev_allocate_iso_resource)
246 #define FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE _IOW('#', 0x0e, struct fw_cdev_deallocate)
247 #define FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE _IOW('#', 0x0f, struct fw_cdev_allocate_iso_resource)
248 #define FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE_ONCE _IOW('#', 0x10, struct fw_cdev_allocate_iso_resource)
249 #define FW_CDEV_IOC_GET_SPEED _IOR('#', 0x11, struct fw_cdev_get_speed)
250 #define FW_CDEV_IOC_SEND_BROADCAST_REQUEST _IOW('#', 0x12, struct fw_cdev_send_request)
253 * FW_CDEV_VERSION History
254 * 1 (2.6.22) - initial version
255 * 2 (2.6.30) - changed &fw_cdev_event_iso_interrupt.header if
256 * &fw_cdev_create_iso_context.header_size is 8 or more
258 #define FW_CDEV_VERSION 2
261 * struct fw_cdev_get_info - General purpose information ioctl
262 * @version: The version field is just a running serial number.
263 * We never break backwards compatibility, but may add more
264 * structs and ioctls in later revisions.
265 * @rom_length: If @rom is non-zero, at most rom_length bytes of configuration
266 * ROM will be copied into that user space address. In either
267 * case, @rom_length is updated with the actual length of the
269 * @rom: If non-zero, address of a buffer to be filled by a copy of the
270 * device's configuration ROM
271 * @bus_reset: If non-zero, address of a buffer to be filled by a
272 * &struct fw_cdev_event_bus_reset with the current state
273 * of the bus. This does not cause a bus reset to happen.
274 * @bus_reset_closure: Value of &closure in this and subsequent bus reset events
275 * @card: The index of the card this device belongs to
277 struct fw_cdev_get_info
{
282 __u64 bus_reset_closure
;
287 * struct fw_cdev_send_request - Send an asynchronous request packet
288 * @tcode: Transaction code of the request
289 * @length: Length of outgoing payload, in bytes
290 * @offset: 48-bit offset at destination node
291 * @closure: Passed back to userspace in the response event
292 * @data: Userspace pointer to payload
293 * @generation: The bus generation where packet is valid
295 * Send a request to the device. This ioctl implements all outgoing requests.
296 * Both quadlet and block request specify the payload as a pointer to the data
297 * in the @data field. Once the transaction completes, the kernel writes an
298 * &fw_cdev_event_response event back. The @closure field is passed back to
299 * user space in the response event.
301 struct fw_cdev_send_request
{
311 * struct fw_cdev_send_response - Send an asynchronous response packet
312 * @rcode: Response code as determined by the userspace handler
313 * @length: Length of outgoing payload, in bytes
314 * @data: Userspace pointer to payload
315 * @handle: The handle from the &fw_cdev_event_request
317 * Send a response to an incoming request. By setting up an address range using
318 * the %FW_CDEV_IOC_ALLOCATE ioctl, userspace can listen for incoming requests. An
319 * incoming request will generate an %FW_CDEV_EVENT_REQUEST, and userspace must
320 * send a reply using this ioctl. The event has a handle to the kernel-side
321 * pending transaction, which should be used with this ioctl.
323 struct fw_cdev_send_response
{
331 * struct fw_cdev_allocate - Allocate a CSR address range
332 * @offset: Start offset of the address range
333 * @closure: To be passed back to userspace in request events
334 * @length: Length of the address range, in bytes
335 * @handle: Handle to the allocation, written by the kernel
337 * Allocate an address range in the 48-bit address space on the local node
338 * (the controller). This allows userspace to listen for requests with an
339 * offset within that address range. When the kernel receives a request
340 * within the range, an &fw_cdev_event_request event will be written back.
341 * The @closure field is passed back to userspace in the response event.
342 * The @handle field is an out parameter, returning a handle to the allocated
343 * range to be used for later deallocation of the range.
345 struct fw_cdev_allocate
{
353 * struct fw_cdev_deallocate - Free a CSR address range or isochronous resource
354 * @handle: Handle to the address range or iso resource, as returned by the
355 * kernel when the range or resource was allocated
357 struct fw_cdev_deallocate
{
361 #define FW_CDEV_LONG_RESET 0
362 #define FW_CDEV_SHORT_RESET 1
365 * struct fw_cdev_initiate_bus_reset - Initiate a bus reset
366 * @type: %FW_CDEV_SHORT_RESET or %FW_CDEV_LONG_RESET
368 * Initiate a bus reset for the bus this device is on. The bus reset can be
369 * either the original (long) bus reset or the arbitrated (short) bus reset
370 * introduced in 1394a-2000.
372 struct fw_cdev_initiate_bus_reset
{
373 __u32 type
; /* FW_CDEV_SHORT_RESET or FW_CDEV_LONG_RESET */
377 * struct fw_cdev_add_descriptor - Add contents to the local node's config ROM
378 * @immediate: If non-zero, immediate key to insert before pointer
379 * @key: Upper 8 bits of root directory pointer
380 * @data: Userspace pointer to contents of descriptor block
381 * @length: Length of descriptor block data, in bytes
382 * @handle: Handle to the descriptor, written by the kernel
384 * Add a descriptor block and optionally a preceding immediate key to the local
385 * node's configuration ROM.
387 * The @key field specifies the upper 8 bits of the descriptor root directory
388 * pointer and the @data and @length fields specify the contents. The @key
389 * should be of the form 0xXX000000. The offset part of the root directory entry
390 * will be filled in by the kernel.
392 * If not 0, the @immediate field specifies an immediate key which will be
393 * inserted before the root directory pointer.
395 * If successful, the kernel adds the descriptor and writes back a handle to the
396 * kernel-side object to be used for later removal of the descriptor block and
399 struct fw_cdev_add_descriptor
{
408 * struct fw_cdev_remove_descriptor - Remove contents from the configuration ROM
409 * @handle: Handle to the descriptor, as returned by the kernel when the
410 * descriptor was added
412 * Remove a descriptor block and accompanying immediate key from the local
413 * node's configuration ROM.
415 struct fw_cdev_remove_descriptor
{
419 #define FW_CDEV_ISO_CONTEXT_TRANSMIT 0
420 #define FW_CDEV_ISO_CONTEXT_RECEIVE 1
423 * struct fw_cdev_create_iso_context - Create a context for isochronous IO
424 * @type: %FW_CDEV_ISO_CONTEXT_TRANSMIT or %FW_CDEV_ISO_CONTEXT_RECEIVE
425 * @header_size: Header size to strip for receive contexts
426 * @channel: Channel to bind to
427 * @speed: Speed to transmit at
428 * @closure: To be returned in &fw_cdev_event_iso_interrupt
429 * @handle: Handle to context, written back by kernel
431 * Prior to sending or receiving isochronous I/O, a context must be created.
432 * The context records information about the transmit or receive configuration
433 * and typically maps to an underlying hardware resource. A context is set up
434 * for either sending or receiving. It is bound to a specific isochronous
437 * If a context was successfully created, the kernel writes back a handle to the
438 * context, which must be passed in for subsequent operations on that context.
440 * Note that the effect of a @header_size > 4 depends on
441 * &fw_cdev_get_info.version, as documented at &fw_cdev_event_iso_interrupt.
443 struct fw_cdev_create_iso_context
{
452 #define FW_CDEV_ISO_PAYLOAD_LENGTH(v) (v)
453 #define FW_CDEV_ISO_INTERRUPT (1 << 16)
454 #define FW_CDEV_ISO_SKIP (1 << 17)
455 #define FW_CDEV_ISO_SYNC (1 << 17)
456 #define FW_CDEV_ISO_TAG(v) ((v) << 18)
457 #define FW_CDEV_ISO_SY(v) ((v) << 20)
458 #define FW_CDEV_ISO_HEADER_LENGTH(v) ((v) << 24)
461 * struct fw_cdev_iso_packet - Isochronous packet
462 * @control: Contains the header length (8 uppermost bits), the sy field
463 * (4 bits), the tag field (2 bits), a sync flag (1 bit),
464 * a skip flag (1 bit), an interrupt flag (1 bit), and the
465 * payload length (16 lowermost bits)
466 * @header: Header and payload
468 * &struct fw_cdev_iso_packet is used to describe isochronous packet queues.
470 * Use the FW_CDEV_ISO_ macros to fill in @control. The sy and tag fields are
471 * specified by IEEE 1394a and IEC 61883.
473 * FIXME - finish this documentation
475 struct fw_cdev_iso_packet
{
481 * struct fw_cdev_queue_iso - Queue isochronous packets for I/O
482 * @packets: Userspace pointer to packet data
483 * @data: Pointer into mmap()'ed payload buffer
484 * @size: Size of packet data in bytes
485 * @handle: Isochronous context handle
487 * Queue a number of isochronous packets for reception or transmission.
488 * This ioctl takes a pointer to an array of &fw_cdev_iso_packet structs,
489 * which describe how to transmit from or receive into a contiguous region
490 * of a mmap()'ed payload buffer. As part of the packet descriptors,
491 * a series of headers can be supplied, which will be prepended to the
492 * payload during DMA.
494 * The kernel may or may not queue all packets, but will write back updated
495 * values of the @packets, @data and @size fields, so the ioctl can be
496 * resubmitted easily.
498 struct fw_cdev_queue_iso
{
505 #define FW_CDEV_ISO_CONTEXT_MATCH_TAG0 1
506 #define FW_CDEV_ISO_CONTEXT_MATCH_TAG1 2
507 #define FW_CDEV_ISO_CONTEXT_MATCH_TAG2 4
508 #define FW_CDEV_ISO_CONTEXT_MATCH_TAG3 8
509 #define FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS 15
512 * struct fw_cdev_start_iso - Start an isochronous transmission or reception
513 * @cycle: Cycle in which to start I/O. If @cycle is greater than or
514 * equal to 0, the I/O will start on that cycle.
515 * @sync: Determines the value to wait for for receive packets that have
516 * the %FW_CDEV_ISO_SYNC bit set
517 * @tags: Tag filter bit mask. Only valid for isochronous reception.
518 * Determines the tag values for which packets will be accepted.
519 * Use FW_CDEV_ISO_CONTEXT_MATCH_ macros to set @tags.
520 * @handle: Isochronous context handle within which to transmit or receive
522 struct fw_cdev_start_iso
{
530 * struct fw_cdev_stop_iso - Stop an isochronous transmission or reception
531 * @handle: Handle of isochronous context to stop
533 struct fw_cdev_stop_iso
{
538 * struct fw_cdev_get_cycle_timer - read cycle timer register
539 * @local_time: system time, in microseconds since the Epoch
540 * @cycle_timer: isochronous cycle timer, as per OHCI 1.1 clause 5.13
542 * The %FW_CDEV_IOC_GET_CYCLE_TIMER ioctl reads the isochronous cycle timer
543 * and also the system clock. This allows to express the receive time of an
544 * isochronous packet as a system time with microsecond accuracy.
546 * @cycle_timer consists of 7 bits cycleSeconds, 13 bits cycleCount, and
547 * 12 bits cycleOffset, in host byte order.
549 struct fw_cdev_get_cycle_timer
{
555 * struct fw_cdev_allocate_iso_resource - (De)allocate a channel or bandwidth
556 * @closure: Passed back to userspace in correponding iso resource events
557 * @channels: Isochronous channels of which one is to be (de)allocated
558 * @bandwidth: Isochronous bandwidth units to be (de)allocated
559 * @handle: Handle to the allocation, written by the kernel (only valid in
560 * case of %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE ioctls)
562 * The %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE ioctl initiates allocation of an
563 * isochronous channel and/or of isochronous bandwidth at the isochronous
564 * resource manager (IRM). Only one of the channels specified in @channels is
565 * allocated. An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED is sent after
566 * communication with the IRM, indicating success or failure in the event data.
567 * The kernel will automatically reallocate the resources after bus resets.
568 * Should a reallocation fail, an %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event
569 * will be sent. The kernel will also automatically deallocate the resources
570 * when the file descriptor is closed.
572 * The %FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE ioctl can be used to initiate
573 * deallocation of resources which were allocated as described above.
574 * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event concludes this operation.
576 * The %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE ioctl is a variant of allocation
577 * without automatic re- or deallocation.
578 * An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED event concludes this operation,
579 * indicating success or failure in its data.
581 * The %FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE_ONCE ioctl works like
582 * %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE except that resources are freed
583 * instead of allocated. At most one channel may be specified in this ioctl.
584 * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event concludes this operation.
586 * To summarize, %FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE allocates iso resources
587 * for the lifetime of the fd or handle.
588 * In contrast, %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE allocates iso resources
589 * for the duration of a bus generation.
591 * @channels is a host-endian bitfield with the most significant bit
592 * representing channel 0 and the least significant bit representing channel 63:
595 * @bandwidth is expressed in bandwidth allocation units, i.e. the time to send
596 * one quadlet of data (payload or header data) at speed S1600.
598 struct fw_cdev_allocate_iso_resource
{
606 * struct fw_cdev_get_speed - Query maximum speed to or from this device
607 * @max_speed: Speed code; minimum of the device's link speed, the local node's
608 * link speed, and all PHY port speeds between the two links
610 struct fw_cdev_get_speed
{
614 #endif /* _LINUX_FIREWIRE_CDEV_H */