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//usr/local/ssl/include/linux/firewire-cdev.h
/* * Char device interface. * * Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef _LINUX_FIREWIRE_CDEV_H #define _LINUX_FIREWIRE_CDEV_H #include <linux/ioctl.h> #include <linux/types.h> #include <linux/firewire-constants.h> #define FW_CDEV_EVENT_BUS_RESET 0x00 #define FW_CDEV_EVENT_RESPONSE 0x01 #define FW_CDEV_EVENT_REQUEST 0x02 #define FW_CDEV_EVENT_ISO_INTERRUPT 0x03 #define FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED 0x04 #define FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED 0x05 /** * struct fw_cdev_event_common - Common part of all fw_cdev_event_ types * @closure: For arbitrary use by userspace * @type: Discriminates the fw_cdev_event_ types * * This struct may be used to access generic members of all fw_cdev_event_ * types regardless of the specific type. * * Data passed in the @closure field for a request will be returned in the * corresponding event. It is big enough to hold a pointer on all platforms. * The ioctl used to set @closure depends on the @type of event. */ struct fw_cdev_event_common { __u64 closure; __u32 type; }; /** * struct fw_cdev_event_bus_reset - Sent when a bus reset occurred * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_GET_INFO ioctl * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_BUS_RESET * @node_id: New node ID of this node * @local_node_id: Node ID of the local node, i.e. of the controller * @bm_node_id: Node ID of the bus manager * @irm_node_id: Node ID of the iso resource manager * @root_node_id: Node ID of the root node * @generation: New bus generation * * This event is sent when the bus the device belongs to goes through a bus * reset. It provides information about the new bus configuration, such as * new node ID for this device, new root ID, and others. */ struct fw_cdev_event_bus_reset { __u64 closure; __u32 type; __u32 node_id; __u32 local_node_id; __u32 bm_node_id; __u32 irm_node_id; __u32 root_node_id; __u32 generation; }; /** * struct fw_cdev_event_response - Sent when a response packet was received * @closure: See &fw_cdev_event_common; * set by %FW_CDEV_IOC_SEND_REQUEST ioctl * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_RESPONSE * @rcode: Response code returned by the remote node * @length: Data length, i.e. the response's payload size in bytes * @data: Payload data, if any * * This event is sent when the stack receives a response to an outgoing request * sent by %FW_CDEV_IOC_SEND_REQUEST ioctl. The payload data for responses * carrying data (read and lock responses) follows immediately and can be * accessed through the @data field. */ struct fw_cdev_event_response { __u64 closure; __u32 type; __u32 rcode; __u32 length; __u32 data[0]; }; /** * struct fw_cdev_event_request - Sent on incoming request to an address region * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_ALLOCATE ioctl * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_REQUEST * @tcode: Transaction code of the incoming request * @offset: The offset into the 48-bit per-node address space * @handle: Reference to the kernel-side pending request * @length: Data length, i.e. the request's payload size in bytes * @data: Incoming data, if any * * This event is sent when the stack receives an incoming request to an address * region registered using the %FW_CDEV_IOC_ALLOCATE ioctl. The request is * guaranteed to be completely contained in the specified region. Userspace is * responsible for sending the response by %FW_CDEV_IOC_SEND_RESPONSE ioctl, * using the same @handle. * * The payload data for requests carrying data (write and lock requests) * follows immediately and can be accessed through the @data field. */ struct fw_cdev_event_request { __u64 closure; __u32 type; __u32 tcode; __u64 offset; __u32 handle; __u32 length; __u32 data[0]; }; /** * struct fw_cdev_event_iso_interrupt - Sent when an iso packet was completed * @closure: See &fw_cdev_event_common; * set by %FW_CDEV_CREATE_ISO_CONTEXT ioctl * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_ISO_INTERRUPT * @cycle: Cycle counter of the interrupt packet * @header_length: Total length of following headers, in bytes * @header: Stripped headers, if any * * This event is sent when the controller has completed an &fw_cdev_iso_packet * with the %FW_CDEV_ISO_INTERRUPT bit set. In the receive case, the headers * stripped of all packets up until and including the interrupt packet are * returned in the @header field. The amount of header data per packet is as * specified at iso context creation by &fw_cdev_create_iso_context.header_size. * * In version 1 of this ABI, header data consisted of the 1394 isochronous * packet header, followed by quadlets from the packet payload if * &fw_cdev_create_iso_context.header_size > 4. * * In version 2 of this ABI, header data consist of the 1394 isochronous * packet header, followed by a timestamp quadlet if * &fw_cdev_create_iso_context.header_size > 4, followed by quadlets from the * packet payload if &fw_cdev_create_iso_context.header_size > 8. * * Behaviour of ver. 1 of this ABI is no longer available since ABI ver. 2. * * Format of 1394 iso packet header: 16 bits len, 2 bits tag, 6 bits channel, * 4 bits tcode, 4 bits sy, in big endian byte order. Format of timestamp: * 16 bits invalid, 3 bits cycleSeconds, 13 bits cycleCount, in big endian byte * order. */ struct fw_cdev_event_iso_interrupt { __u64 closure; __u32 type; __u32 cycle; __u32 header_length; __u32 header[0]; }; /** * struct fw_cdev_event_iso_resource - Iso resources were allocated or freed * @closure: See &fw_cdev_event_common; * set by %FW_CDEV_IOC_(DE)ALLOCATE_ISO_RESOURCE(_ONCE) ioctl * @type: %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED or * %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED * @handle: Reference by which an allocated resource can be deallocated * @channel: Isochronous channel which was (de)allocated, if any * @bandwidth: Bandwidth allocation units which were (de)allocated, if any * * An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED event is sent after an isochronous * resource was allocated at the IRM. The client has to check @channel and * @bandwidth for whether the allocation actually succeeded. * * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event is sent after an isochronous * resource was deallocated at the IRM. It is also sent when automatic * reallocation after a bus reset failed. * * @channel is <0 if no channel was (de)allocated or if reallocation failed. * @bandwidth is 0 if no bandwidth was (de)allocated or if reallocation failed. */ struct fw_cdev_event_iso_resource { __u64 closure; __u32 type; __u32 handle; __s32 channel; __s32 bandwidth; }; /** * union fw_cdev_event - Convenience union of fw_cdev_event_ types * @common: Valid for all types * @bus_reset: Valid if @common.type == %FW_CDEV_EVENT_BUS_RESET * @response: Valid if @common.type == %FW_CDEV_EVENT_RESPONSE * @request: Valid if @common.type == %FW_CDEV_EVENT_REQUEST * @iso_interrupt: Valid if @common.type == %FW_CDEV_EVENT_ISO_INTERRUPT * @iso_resource: Valid if @common.type == * %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED or * %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED * * Convenience union for userspace use. Events could be read(2) into an * appropriately aligned char buffer and then cast to this union for further * processing. Note that for a request, response or iso_interrupt event, * the data[] or header[] may make the size of the full event larger than * sizeof(union fw_cdev_event). Also note that if you attempt to read(2) * an event into a buffer that is not large enough for it, the data that does * not fit will be discarded so that the next read(2) will return a new event. */ union fw_cdev_event { struct fw_cdev_event_common common; struct fw_cdev_event_bus_reset bus_reset; struct fw_cdev_event_response response; struct fw_cdev_event_request request; struct fw_cdev_event_iso_interrupt iso_interrupt; struct fw_cdev_event_iso_resource iso_resource; }; /* available since kernel version 2.6.22 */ #define FW_CDEV_IOC_GET_INFO _IOWR('#', 0x00, struct fw_cdev_get_info) #define FW_CDEV_IOC_SEND_REQUEST _IOW('#', 0x01, struct fw_cdev_send_request) #define FW_CDEV_IOC_ALLOCATE _IOWR('#', 0x02, struct fw_cdev_allocate) #define FW_CDEV_IOC_DEALLOCATE _IOW('#', 0x03, struct fw_cdev_deallocate) #define FW_CDEV_IOC_SEND_RESPONSE _IOW('#', 0x04, struct fw_cdev_send_response) #define FW_CDEV_IOC_INITIATE_BUS_RESET _IOW('#', 0x05, struct fw_cdev_initiate_bus_reset) #define FW_CDEV_IOC_ADD_DESCRIPTOR _IOWR('#', 0x06, struct fw_cdev_add_descriptor) #define FW_CDEV_IOC_REMOVE_DESCRIPTOR _IOW('#', 0x07, struct fw_cdev_remove_descriptor) #define FW_CDEV_IOC_CREATE_ISO_CONTEXT _IOWR('#', 0x08, struct fw_cdev_create_iso_context) #define FW_CDEV_IOC_QUEUE_ISO _IOWR('#', 0x09, struct fw_cdev_queue_iso) #define FW_CDEV_IOC_START_ISO _IOW('#', 0x0a, struct fw_cdev_start_iso) #define FW_CDEV_IOC_STOP_ISO _IOW('#', 0x0b, struct fw_cdev_stop_iso) /* available since kernel version 2.6.24 */ #define FW_CDEV_IOC_GET_CYCLE_TIMER _IOR('#', 0x0c, struct fw_cdev_get_cycle_timer) /* available since kernel version 2.6.30 */ #define FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE _IOWR('#', 0x0d, struct fw_cdev_allocate_iso_resource) #define FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE _IOW('#', 0x0e, struct fw_cdev_deallocate) #define FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE _IOW('#', 0x0f, struct fw_cdev_allocate_iso_resource) #define FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE_ONCE _IOW('#', 0x10, struct fw_cdev_allocate_iso_resource) #define FW_CDEV_IOC_GET_SPEED _IO('#', 0x11) /* returns speed code */ #define FW_CDEV_IOC_SEND_BROADCAST_REQUEST _IOW('#', 0x12, struct fw_cdev_send_request) #define FW_CDEV_IOC_SEND_STREAM_PACKET _IOW('#', 0x13, struct fw_cdev_send_stream_packet) /* * FW_CDEV_VERSION History * 1 (2.6.22) - initial version * 2 (2.6.30) - changed &fw_cdev_event_iso_interrupt.header if * &fw_cdev_create_iso_context.header_size is 8 or more */ #define FW_CDEV_VERSION 2 /** * struct fw_cdev_get_info - General purpose information ioctl * @version: The version field is just a running serial number. * We never break backwards compatibility, but may add more * structs and ioctls in later revisions. * @rom_length: If @rom is non-zero, at most rom_length bytes of configuration * ROM will be copied into that user space address. In either * case, @rom_length is updated with the actual length of the * configuration ROM. * @rom: If non-zero, address of a buffer to be filled by a copy of the * device's configuration ROM * @bus_reset: If non-zero, address of a buffer to be filled by a * &struct fw_cdev_event_bus_reset with the current state * of the bus. This does not cause a bus reset to happen. * @bus_reset_closure: Value of &closure in this and subsequent bus reset events * @card: The index of the card this device belongs to */ struct fw_cdev_get_info { __u32 version; __u32 rom_length; __u64 rom; __u64 bus_reset; __u64 bus_reset_closure; __u32 card; }; /** * struct fw_cdev_send_request - Send an asynchronous request packet * @tcode: Transaction code of the request * @length: Length of outgoing payload, in bytes * @offset: 48-bit offset at destination node * @closure: Passed back to userspace in the response event * @data: Userspace pointer to payload * @generation: The bus generation where packet is valid * * Send a request to the device. This ioctl implements all outgoing requests. * Both quadlet and block request specify the payload as a pointer to the data * in the @data field. Once the transaction completes, the kernel writes an * &fw_cdev_event_response event back. The @closure field is passed back to * user space in the response event. */ struct fw_cdev_send_request { __u32 tcode; __u32 length; __u64 offset; __u64 closure; __u64 data; __u32 generation; }; /** * struct fw_cdev_send_response - Send an asynchronous response packet * @rcode: Response code as determined by the userspace handler * @length: Length of outgoing payload, in bytes * @data: Userspace pointer to payload * @handle: The handle from the &fw_cdev_event_request * * Send a response to an incoming request. By setting up an address range using * the %FW_CDEV_IOC_ALLOCATE ioctl, userspace can listen for incoming requests. An * incoming request will generate an %FW_CDEV_EVENT_REQUEST, and userspace must * send a reply using this ioctl. The event has a handle to the kernel-side * pending transaction, which should be used with this ioctl. */ struct fw_cdev_send_response { __u32 rcode; __u32 length; __u64 data; __u32 handle; }; /** * struct fw_cdev_allocate - Allocate a CSR address range * @offset: Start offset of the address range * @closure: To be passed back to userspace in request events * @length: Length of the address range, in bytes * @handle: Handle to the allocation, written by the kernel * * Allocate an address range in the 48-bit address space on the local node * (the controller). This allows userspace to listen for requests with an * offset within that address range. When the kernel receives a request * within the range, an &fw_cdev_event_request event will be written back. * The @closure field is passed back to userspace in the response event. * The @handle field is an out parameter, returning a handle to the allocated * range to be used for later deallocation of the range. */ struct fw_cdev_allocate { __u64 offset; __u64 closure; __u32 length; __u32 handle; }; /** * struct fw_cdev_deallocate - Free a CSR address range or isochronous resource * @handle: Handle to the address range or iso resource, as returned by the * kernel when the range or resource was allocated */ struct fw_cdev_deallocate { __u32 handle; }; #define FW_CDEV_LONG_RESET 0 #define FW_CDEV_SHORT_RESET 1 /** * struct fw_cdev_initiate_bus_reset - Initiate a bus reset * @type: %FW_CDEV_SHORT_RESET or %FW_CDEV_LONG_RESET * * Initiate a bus reset for the bus this device is on. The bus reset can be * either the original (long) bus reset or the arbitrated (short) bus reset * introduced in 1394a-2000. */ struct fw_cdev_initiate_bus_reset { __u32 type; /* FW_CDEV_SHORT_RESET or FW_CDEV_LONG_RESET */ }; /** * struct fw_cdev_add_descriptor - Add contents to the local node's config ROM * @immediate: If non-zero, immediate key to insert before pointer * @key: Upper 8 bits of root directory pointer * @data: Userspace pointer to contents of descriptor block * @length: Length of descriptor block data, in bytes * @handle: Handle to the descriptor, written by the kernel * * Add a descriptor block and optionally a preceding immediate key to the local * node's configuration ROM. * * The @key field specifies the upper 8 bits of the descriptor root directory * pointer and the @data and @length fields specify the contents. The @key * should be of the form 0xXX000000. The offset part of the root directory entry * will be filled in by the kernel. * * If not 0, the @immediate field specifies an immediate key which will be * inserted before the root directory pointer. * * If successful, the kernel adds the descriptor and writes back a handle to the * kernel-side object to be used for later removal of the descriptor block and * immediate key. * * This ioctl affects the configuration ROMs of all local nodes. * The ioctl only succeeds on device files which represent a local node. */ struct fw_cdev_add_descriptor { __u32 immediate; __u32 key; __u64 data; __u32 length; __u32 handle; }; /** * struct fw_cdev_remove_descriptor - Remove contents from the configuration ROM * @handle: Handle to the descriptor, as returned by the kernel when the * descriptor was added * * Remove a descriptor block and accompanying immediate key from the local * nodes' configuration ROMs. */ struct fw_cdev_remove_descriptor { __u32 handle; }; #define FW_CDEV_ISO_CONTEXT_TRANSMIT 0 #define FW_CDEV_ISO_CONTEXT_RECEIVE 1 /** * struct fw_cdev_create_iso_context - Create a context for isochronous IO * @type: %FW_CDEV_ISO_CONTEXT_TRANSMIT or %FW_CDEV_ISO_CONTEXT_RECEIVE * @header_size: Header size to strip for receive contexts * @channel: Channel to bind to * @speed: Speed to transmit at * @closure: To be returned in &fw_cdev_event_iso_interrupt * @handle: Handle to context, written back by kernel * * Prior to sending or receiving isochronous I/O, a context must be created. * The context records information about the transmit or receive configuration * and typically maps to an underlying hardware resource. A context is set up * for either sending or receiving. It is bound to a specific isochronous * channel. * * If a context was successfully created, the kernel writes back a handle to the * context, which must be passed in for subsequent operations on that context. * * Note that the effect of a @header_size > 4 depends on * &fw_cdev_get_info.version, as documented at &fw_cdev_event_iso_interrupt. */ struct fw_cdev_create_iso_context { __u32 type; __u32 header_size; __u32 channel; __u32 speed; __u64 closure; __u32 handle; }; #define FW_CDEV_ISO_PAYLOAD_LENGTH(v) (v) #define FW_CDEV_ISO_INTERRUPT (1 << 16) #define FW_CDEV_ISO_SKIP (1 << 17) #define FW_CDEV_ISO_SYNC (1 << 17) #define FW_CDEV_ISO_TAG(v) ((v) << 18) #define FW_CDEV_ISO_SY(v) ((v) << 20) #define FW_CDEV_ISO_HEADER_LENGTH(v) ((v) << 24) /** * struct fw_cdev_iso_packet - Isochronous packet * @control: Contains the header length (8 uppermost bits), the sy field * (4 bits), the tag field (2 bits), a sync flag (1 bit), * a skip flag (1 bit), an interrupt flag (1 bit), and the * payload length (16 lowermost bits) * @header: Header and payload * * &struct fw_cdev_iso_packet is used to describe isochronous packet queues. * * Use the FW_CDEV_ISO_ macros to fill in @control. The sy and tag fields are * specified by IEEE 1394a and IEC 61883. * * FIXME - finish this documentation */ struct fw_cdev_iso_packet { __u32 control; __u32 header[0]; }; /** * struct fw_cdev_queue_iso - Queue isochronous packets for I/O * @packets: Userspace pointer to packet data * @data: Pointer into mmap()'ed payload buffer * @size: Size of packet data in bytes * @handle: Isochronous context handle * * Queue a number of isochronous packets for reception or transmission. * This ioctl takes a pointer to an array of &fw_cdev_iso_packet structs, * which describe how to transmit from or receive into a contiguous region * of a mmap()'ed payload buffer. As part of the packet descriptors, * a series of headers can be supplied, which will be prepended to the * payload during DMA. * * The kernel may or may not queue all packets, but will write back updated * values of the @packets, @data and @size fields, so the ioctl can be * resubmitted easily. */ struct fw_cdev_queue_iso { __u64 packets; __u64 data; __u32 size; __u32 handle; }; #define FW_CDEV_ISO_CONTEXT_MATCH_TAG0 1 #define FW_CDEV_ISO_CONTEXT_MATCH_TAG1 2 #define FW_CDEV_ISO_CONTEXT_MATCH_TAG2 4 #define FW_CDEV_ISO_CONTEXT_MATCH_TAG3 8 #define FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS 15 /** * struct fw_cdev_start_iso - Start an isochronous transmission or reception * @cycle: Cycle in which to start I/O. If @cycle is greater than or * equal to 0, the I/O will start on that cycle. * @sync: Determines the value to wait for for receive packets that have * the %FW_CDEV_ISO_SYNC bit set * @tags: Tag filter bit mask. Only valid for isochronous reception. * Determines the tag values for which packets will be accepted. * Use FW_CDEV_ISO_CONTEXT_MATCH_ macros to set @tags. * @handle: Isochronous context handle within which to transmit or receive */ struct fw_cdev_start_iso { __s32 cycle; __u32 sync; __u32 tags; __u32 handle; }; /** * struct fw_cdev_stop_iso - Stop an isochronous transmission or reception * @handle: Handle of isochronous context to stop */ struct fw_cdev_stop_iso { __u32 handle; }; /** * struct fw_cdev_get_cycle_timer - read cycle timer register * @local_time: system time, in microseconds since the Epoch * @cycle_timer: isochronous cycle timer, as per OHCI 1.1 clause 5.13 * * The %FW_CDEV_IOC_GET_CYCLE_TIMER ioctl reads the isochronous cycle timer * and also the system clock. This allows to express the receive time of an * isochronous packet as a system time with microsecond accuracy. * * @cycle_timer consists of 7 bits cycleSeconds, 13 bits cycleCount, and * 12 bits cycleOffset, in host byte order. */ struct fw_cdev_get_cycle_timer { __u64 local_time; __u32 cycle_timer; }; /** * struct fw_cdev_allocate_iso_resource - (De)allocate a channel or bandwidth * @closure: Passed back to userspace in correponding iso resource events * @channels: Isochronous channels of which one is to be (de)allocated * @bandwidth: Isochronous bandwidth units to be (de)allocated * @handle: Handle to the allocation, written by the kernel (only valid in * case of %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE ioctls) * * The %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE ioctl initiates allocation of an * isochronous channel and/or of isochronous bandwidth at the isochronous * resource manager (IRM). Only one of the channels specified in @channels is * allocated. An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED is sent after * communication with the IRM, indicating success or failure in the event data. * The kernel will automatically reallocate the resources after bus resets. * Should a reallocation fail, an %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event * will be sent. The kernel will also automatically deallocate the resources * when the file descriptor is closed. * * The %FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE ioctl can be used to initiate * deallocation of resources which were allocated as described above. * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event concludes this operation. * * The %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE ioctl is a variant of allocation * without automatic re- or deallocation. * An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED event concludes this operation, * indicating success or failure in its data. * * The %FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE_ONCE ioctl works like * %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE except that resources are freed * instead of allocated. * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event concludes this operation. * * To summarize, %FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE allocates iso resources * for the lifetime of the fd or handle. * In contrast, %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE allocates iso resources * for the duration of a bus generation. * * @channels is a host-endian bitfield with the least significant bit * representing channel 0 and the most significant bit representing channel 63: * 1ULL << c for each channel c that is a candidate for (de)allocation. * * @bandwidth is expressed in bandwidth allocation units, i.e. the time to send * one quadlet of data (payload or header data) at speed S1600. */ struct fw_cdev_allocate_iso_resource { __u64 closure; __u64 channels; __u32 bandwidth; __u32 handle; }; /** * struct fw_cdev_send_stream_packet - send an asynchronous stream packet * @length: Length of outgoing payload, in bytes * @tag: Data format tag * @channel: Isochronous channel to transmit to * @sy: Synchronization code * @closure: Passed back to userspace in the response event * @data: Userspace pointer to payload * @generation: The bus generation where packet is valid * @speed: Speed to transmit at * * The %FW_CDEV_IOC_SEND_STREAM_PACKET ioctl sends an asynchronous stream packet * to every device which is listening to the specified channel. The kernel * writes an &fw_cdev_event_response event which indicates success or failure of * the transmission. */ struct fw_cdev_send_stream_packet { __u32 length; __u32 tag; __u32 channel; __u32 sy; __u64 closure; __u64 data; __u32 generation; __u32 speed; }; #endif /* _LINUX_FIREWIRE_CDEV_H */
