1/* 2 * Char device interface. 3 * 4 * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 23 * DEALINGS IN THE SOFTWARE. 24 */ 25 26#ifndef _LINUX_FIREWIRE_CDEV_H 27#define _LINUX_FIREWIRE_CDEV_H 28 29#include <linux/ioctl.h> 30#include <linux/types.h> 31#include <linux/firewire-constants.h> 32 33/* available since kernel version 2.6.22 */ 34#define FW_CDEV_EVENT_BUS_RESET 0x00 35#define FW_CDEV_EVENT_RESPONSE 0x01 36#define FW_CDEV_EVENT_REQUEST 0x02 37#define FW_CDEV_EVENT_ISO_INTERRUPT 0x03 38 39/* available since kernel version 2.6.30 */ 40#define FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED 0x04 41#define FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED 0x05 42 43/* available since kernel version 2.6.36 */ 44#define FW_CDEV_EVENT_REQUEST2 0x06 45#define FW_CDEV_EVENT_PHY_PACKET_SENT 0x07 46#define FW_CDEV_EVENT_PHY_PACKET_RECEIVED 0x08 47#define FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL 0x09 48 49/** 50 * struct fw_cdev_event_common - Common part of all fw_cdev_event_ types 51 * @closure: For arbitrary use by userspace 52 * @type: Discriminates the fw_cdev_event_ types 53 * 54 * This struct may be used to access generic members of all fw_cdev_event_ 55 * types regardless of the specific type. 56 * 57 * Data passed in the @closure field for a request will be returned in the 58 * corresponding event. It is big enough to hold a pointer on all platforms. 59 * The ioctl used to set @closure depends on the @type of event. 60 */ 61struct fw_cdev_event_common { 62 __u64 closure; 63 __u32 type; 64}; 65 66/** 67 * struct fw_cdev_event_bus_reset - Sent when a bus reset occurred 68 * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_GET_INFO ioctl 69 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_BUS_RESET 70 * @node_id: New node ID of this node 71 * @local_node_id: Node ID of the local node, i.e. of the controller 72 * @bm_node_id: Node ID of the bus manager 73 * @irm_node_id: Node ID of the iso resource manager 74 * @root_node_id: Node ID of the root node 75 * @generation: New bus generation 76 * 77 * This event is sent when the bus the device belongs to goes through a bus 78 * reset. It provides information about the new bus configuration, such as 79 * new node ID for this device, new root ID, and others. 80 * 81 * If @bm_node_id is 0xffff right after bus reset it can be reread by an 82 * %FW_CDEV_IOC_GET_INFO ioctl after bus manager selection was finished. 83 * Kernels with ABI version < 4 do not set @bm_node_id. 84 */ 85struct fw_cdev_event_bus_reset { 86 __u64 closure; 87 __u32 type; 88 __u32 node_id; 89 __u32 local_node_id; 90 __u32 bm_node_id; 91 __u32 irm_node_id; 92 __u32 root_node_id; 93 __u32 generation; 94}; 95 96/** 97 * struct fw_cdev_event_response - Sent when a response packet was received 98 * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_SEND_REQUEST 99 * or %FW_CDEV_IOC_SEND_BROADCAST_REQUEST 100 * or %FW_CDEV_IOC_SEND_STREAM_PACKET ioctl 101 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_RESPONSE 102 * @rcode: Response code returned by the remote node 103 * @length: Data length, i.e. the response's payload size in bytes 104 * @data: Payload data, if any 105 * 106 * This event is sent when the stack receives a response to an outgoing request 107 * sent by %FW_CDEV_IOC_SEND_REQUEST ioctl. The payload data for responses 108 * carrying data (read and lock responses) follows immediately and can be 109 * accessed through the @data field. 110 * 111 * The event is also generated after conclusions of transactions that do not 112 * involve response packets. This includes unified write transactions, 113 * broadcast write transactions, and transmission of asynchronous stream 114 * packets. @rcode indicates success or failure of such transmissions. 115 */ 116struct fw_cdev_event_response { 117 __u64 closure; 118 __u32 type; 119 __u32 rcode; 120 __u32 length; 121 __u32 data[0]; 122}; 123 124/** 125 * struct fw_cdev_event_request - Old version of &fw_cdev_event_request2 126 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_REQUEST 127 * 128 * This event is sent instead of &fw_cdev_event_request2 if the kernel or 129 * the client implements ABI version <= 3. &fw_cdev_event_request lacks 130 * essential information; use &fw_cdev_event_request2 instead. 131 */ 132struct fw_cdev_event_request { 133 __u64 closure; 134 __u32 type; 135 __u32 tcode; 136 __u64 offset; 137 __u32 handle; 138 __u32 length; 139 __u32 data[0]; 140}; 141 142/** 143 * struct fw_cdev_event_request2 - Sent on incoming request to an address region 144 * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_ALLOCATE ioctl 145 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_REQUEST2 146 * @tcode: Transaction code of the incoming request 147 * @offset: The offset into the 48-bit per-node address space 148 * @source_node_id: Sender node ID 149 * @destination_node_id: Destination node ID 150 * @card: The index of the card from which the request came 151 * @generation: Bus generation in which the request is valid 152 * @handle: Reference to the kernel-side pending request 153 * @length: Data length, i.e. the request's payload size in bytes 154 * @data: Incoming data, if any 155 * 156 * This event is sent when the stack receives an incoming request to an address 157 * region registered using the %FW_CDEV_IOC_ALLOCATE ioctl. The request is 158 * guaranteed to be completely contained in the specified region. Userspace is 159 * responsible for sending the response by %FW_CDEV_IOC_SEND_RESPONSE ioctl, 160 * using the same @handle. 161 * 162 * The payload data for requests carrying data (write and lock requests) 163 * follows immediately and can be accessed through the @data field. 164 * 165 * Unlike &fw_cdev_event_request, @tcode of lock requests is one of the 166 * firewire-core specific %TCODE_LOCK_MASK_SWAP...%TCODE_LOCK_VENDOR_DEPENDENT, 167 * i.e. encodes the extended transaction code. 168 * 169 * @card may differ from &fw_cdev_get_info.card because requests are received 170 * from all cards of the Linux host. @source_node_id, @destination_node_id, and 171 * @generation pertain to that card. Destination node ID and bus generation may 172 * therefore differ from the corresponding fields of the last 173 * &fw_cdev_event_bus_reset. 174 * 175 * @destination_node_id may also differ from the current node ID because of a 176 * non-local bus ID part or in case of a broadcast write request. Note, a 177 * client must call an %FW_CDEV_IOC_SEND_RESPONSE ioctl even in case of a 178 * broadcast write request; the kernel will then release the kernel-side pending 179 * request but will not actually send a response packet. 180 * 181 * In case of a write request to FCP_REQUEST or FCP_RESPONSE, the kernel already 182 * sent a write response immediately after the request was received; in this 183 * case the client must still call an %FW_CDEV_IOC_SEND_RESPONSE ioctl to 184 * release the kernel-side pending request, though another response won't be 185 * sent. 186 * 187 * If the client subsequently needs to initiate requests to the sender node of 188 * an &fw_cdev_event_request2, it needs to use a device file with matching 189 * card index, node ID, and generation for outbound requests. 190 */ 191struct fw_cdev_event_request2 { 192 __u64 closure; 193 __u32 type; 194 __u32 tcode; 195 __u64 offset; 196 __u32 source_node_id; 197 __u32 destination_node_id; 198 __u32 card; 199 __u32 generation; 200 __u32 handle; 201 __u32 length; 202 __u32 data[0]; 203}; 204 205/** 206 * struct fw_cdev_event_iso_interrupt - Sent when an iso packet was completed 207 * @closure: See &fw_cdev_event_common; 208 * set by %FW_CDEV_CREATE_ISO_CONTEXT ioctl 209 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_ISO_INTERRUPT 210 * @cycle: Cycle counter of the last completed packet 211 * @header_length: Total length of following headers, in bytes 212 * @header: Stripped headers, if any 213 * 214 * This event is sent when the controller has completed an &fw_cdev_iso_packet 215 * with the %FW_CDEV_ISO_INTERRUPT bit set, when explicitly requested with 216 * %FW_CDEV_IOC_FLUSH_ISO, or when there have been so many completed packets 217 * without the interrupt bit set that the kernel's internal buffer for @header 218 * is about to overflow. (In the last case, ABI versions < 5 drop header data 219 * up to the next interrupt packet.) 220 * 221 * Isochronous transmit events (context type %FW_CDEV_ISO_CONTEXT_TRANSMIT): 222 * 223 * In version 3 and some implementations of version 2 of the ABI, &header_length 224 * is a multiple of 4 and &header contains timestamps of all packets up until 225 * the interrupt packet. The format of the timestamps is as described below for 226 * isochronous reception. In version 1 of the ABI, &header_length was 0. 227 * 228 * Isochronous receive events (context type %FW_CDEV_ISO_CONTEXT_RECEIVE): 229 * 230 * The headers stripped of all packets up until and including the interrupt 231 * packet are returned in the @header field. The amount of header data per 232 * packet is as specified at iso context creation by 233 * &fw_cdev_create_iso_context.header_size. 234 * 235 * Hence, _interrupt.header_length / _context.header_size is the number of 236 * packets received in this interrupt event. The client can now iterate 237 * through the mmap()'ed DMA buffer according to this number of packets and 238 * to the buffer sizes as the client specified in &fw_cdev_queue_iso. 239 * 240 * Since version 2 of this ABI, the portion for each packet in _interrupt.header 241 * consists of the 1394 isochronous packet header, followed by a timestamp 242 * quadlet if &fw_cdev_create_iso_context.header_size > 4, followed by quadlets 243 * from the packet payload if &fw_cdev_create_iso_context.header_size > 8. 244 * 245 * Format of 1394 iso packet header: 16 bits data_length, 2 bits tag, 6 bits 246 * channel, 4 bits tcode, 4 bits sy, in big endian byte order. 247 * data_length is the actual received size of the packet without the four 248 * 1394 iso packet header bytes. 249 * 250 * Format of timestamp: 16 bits invalid, 3 bits cycleSeconds, 13 bits 251 * cycleCount, in big endian byte order. 252 * 253 * In version 1 of the ABI, no timestamp quadlet was inserted; instead, payload 254 * data followed directly after the 1394 is header if header_size > 4. 255 * Behaviour of ver. 1 of this ABI is no longer available since ABI ver. 2. 256 */ 257struct fw_cdev_event_iso_interrupt { 258 __u64 closure; 259 __u32 type; 260 __u32 cycle; 261 __u32 header_length; 262 __u32 header[0]; 263}; 264 265/** 266 * struct fw_cdev_event_iso_interrupt_mc - An iso buffer chunk was completed 267 * @closure: See &fw_cdev_event_common; 268 * set by %FW_CDEV_CREATE_ISO_CONTEXT ioctl 269 * @type: %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL 270 * @completed: Offset into the receive buffer; data before this offset is valid 271 * 272 * This event is sent in multichannel contexts (context type 273 * %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL) for &fw_cdev_iso_packet buffer 274 * chunks that have been completely filled and that have the 275 * %FW_CDEV_ISO_INTERRUPT bit set, or when explicitly requested with 276 * %FW_CDEV_IOC_FLUSH_ISO. 277 * 278 * The buffer is continuously filled with the following data, per packet: 279 * - the 1394 iso packet header as described at &fw_cdev_event_iso_interrupt, 280 * but in little endian byte order, 281 * - packet payload (as many bytes as specified in the data_length field of 282 * the 1394 iso packet header) in big endian byte order, 283 * - 0...3 padding bytes as needed to align the following trailer quadlet, 284 * - trailer quadlet, containing the reception timestamp as described at 285 * &fw_cdev_event_iso_interrupt, but in little endian byte order. 286 * 287 * Hence the per-packet size is data_length (rounded up to a multiple of 4) + 8. 288 * When processing the data, stop before a packet that would cross the 289 * @completed offset. 290 * 291 * A packet near the end of a buffer chunk will typically spill over into the 292 * next queued buffer chunk. It is the responsibility of the client to check 293 * for this condition, assemble a broken-up packet from its parts, and not to 294 * re-queue any buffer chunks in which as yet unread packet parts reside. 295 */ 296struct fw_cdev_event_iso_interrupt_mc { 297 __u64 closure; 298 __u32 type; 299 __u32 completed; 300}; 301 302/** 303 * struct fw_cdev_event_iso_resource - Iso resources were allocated or freed 304 * @closure: See &fw_cdev_event_common; 305 * set by %FW_CDEV_IOC_(DE)ALLOCATE_ISO_RESOURCE(_ONCE) ioctl 306 * @type: %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED or 307 * %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED 308 * @handle: Reference by which an allocated resource can be deallocated 309 * @channel: Isochronous channel which was (de)allocated, if any 310 * @bandwidth: Bandwidth allocation units which were (de)allocated, if any 311 * 312 * An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED event is sent after an isochronous 313 * resource was allocated at the IRM. The client has to check @channel and 314 * @bandwidth for whether the allocation actually succeeded. 315 * 316 * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event is sent after an isochronous 317 * resource was deallocated at the IRM. It is also sent when automatic 318 * reallocation after a bus reset failed. 319 * 320 * @channel is <0 if no channel was (de)allocated or if reallocation failed. 321 * @bandwidth is 0 if no bandwidth was (de)allocated or if reallocation failed. 322 */ 323struct fw_cdev_event_iso_resource { 324 __u64 closure; 325 __u32 type; 326 __u32 handle; 327 __s32 channel; 328 __s32 bandwidth; 329}; 330 331/** 332 * struct fw_cdev_event_phy_packet - A PHY packet was transmitted or received 333 * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_SEND_PHY_PACKET 334 * or %FW_CDEV_IOC_RECEIVE_PHY_PACKETS ioctl 335 * @type: %FW_CDEV_EVENT_PHY_PACKET_SENT or %..._RECEIVED 336 * @rcode: %RCODE_..., indicates success or failure of transmission 337 * @length: Data length in bytes 338 * @data: Incoming data 339 * 340 * If @type is %FW_CDEV_EVENT_PHY_PACKET_SENT, @length is 0 and @data empty, 341 * except in case of a ping packet: Then, @length is 4, and @data[0] is the 342 * ping time in 49.152MHz clocks if @rcode is %RCODE_COMPLETE. 343 * 344 * If @type is %FW_CDEV_EVENT_PHY_PACKET_RECEIVED, @length is 8 and @data 345 * consists of the two PHY packet quadlets, in host byte order. 346 */ 347struct fw_cdev_event_phy_packet { 348 __u64 closure; 349 __u32 type; 350 __u32 rcode; 351 __u32 length; 352 __u32 data[0]; 353}; 354 355/** 356 * union fw_cdev_event - Convenience union of fw_cdev_event_ types 357 * @common: Valid for all types 358 * @bus_reset: Valid if @common.type == %FW_CDEV_EVENT_BUS_RESET 359 * @response: Valid if @common.type == %FW_CDEV_EVENT_RESPONSE 360 * @request: Valid if @common.type == %FW_CDEV_EVENT_REQUEST 361 * @request2: Valid if @common.type == %FW_CDEV_EVENT_REQUEST2 362 * @iso_interrupt: Valid if @common.type == %FW_CDEV_EVENT_ISO_INTERRUPT 363 * @iso_interrupt_mc: Valid if @common.type == 364 * %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL 365 * @iso_resource: Valid if @common.type == 366 * %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED or 367 * %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED 368 * @phy_packet: Valid if @common.type == 369 * %FW_CDEV_EVENT_PHY_PACKET_SENT or 370 * %FW_CDEV_EVENT_PHY_PACKET_RECEIVED 371 * 372 * Convenience union for userspace use. Events could be read(2) into an 373 * appropriately aligned char buffer and then cast to this union for further 374 * processing. Note that for a request, response or iso_interrupt event, 375 * the data[] or header[] may make the size of the full event larger than 376 * sizeof(union fw_cdev_event). Also note that if you attempt to read(2) 377 * an event into a buffer that is not large enough for it, the data that does 378 * not fit will be discarded so that the next read(2) will return a new event. 379 */ 380union fw_cdev_event { 381 struct fw_cdev_event_common common; 382 struct fw_cdev_event_bus_reset bus_reset; 383 struct fw_cdev_event_response response; 384 struct fw_cdev_event_request request; 385 struct fw_cdev_event_request2 request2; /* added in 2.6.36 */ 386 struct fw_cdev_event_iso_interrupt iso_interrupt; 387 struct fw_cdev_event_iso_interrupt_mc iso_interrupt_mc; /* added in 2.6.36 */ 388 struct fw_cdev_event_iso_resource iso_resource; /* added in 2.6.30 */ 389 struct fw_cdev_event_phy_packet phy_packet; /* added in 2.6.36 */ 390}; 391 392/* available since kernel version 2.6.22 */ 393#define FW_CDEV_IOC_GET_INFO _IOWR('#', 0x00, struct fw_cdev_get_info) 394#define FW_CDEV_IOC_SEND_REQUEST _IOW('#', 0x01, struct fw_cdev_send_request) 395#define FW_CDEV_IOC_ALLOCATE _IOWR('#', 0x02, struct fw_cdev_allocate) 396#define FW_CDEV_IOC_DEALLOCATE _IOW('#', 0x03, struct fw_cdev_deallocate) 397#define FW_CDEV_IOC_SEND_RESPONSE _IOW('#', 0x04, struct fw_cdev_send_response) 398#define FW_CDEV_IOC_INITIATE_BUS_RESET _IOW('#', 0x05, struct fw_cdev_initiate_bus_reset) 399#define FW_CDEV_IOC_ADD_DESCRIPTOR _IOWR('#', 0x06, struct fw_cdev_add_descriptor) 400#define FW_CDEV_IOC_REMOVE_DESCRIPTOR _IOW('#', 0x07, struct fw_cdev_remove_descriptor) 401#define FW_CDEV_IOC_CREATE_ISO_CONTEXT _IOWR('#', 0x08, struct fw_cdev_create_iso_context) 402#define FW_CDEV_IOC_QUEUE_ISO _IOWR('#', 0x09, struct fw_cdev_queue_iso) 403#define FW_CDEV_IOC_START_ISO _IOW('#', 0x0a, struct fw_cdev_start_iso) 404#define FW_CDEV_IOC_STOP_ISO _IOW('#', 0x0b, struct fw_cdev_stop_iso) 405 406/* available since kernel version 2.6.24 */ 407#define FW_CDEV_IOC_GET_CYCLE_TIMER _IOR('#', 0x0c, struct fw_cdev_get_cycle_timer) 408 409/* available since kernel version 2.6.30 */ 410#define FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE _IOWR('#', 0x0d, struct fw_cdev_allocate_iso_resource) 411#define FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE _IOW('#', 0x0e, struct fw_cdev_deallocate) 412#define FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE _IOW('#', 0x0f, struct fw_cdev_allocate_iso_resource) 413#define FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE_ONCE _IOW('#', 0x10, struct fw_cdev_allocate_iso_resource) 414#define FW_CDEV_IOC_GET_SPEED _IO('#', 0x11) /* returns speed code */ 415#define FW_CDEV_IOC_SEND_BROADCAST_REQUEST _IOW('#', 0x12, struct fw_cdev_send_request) 416#define FW_CDEV_IOC_SEND_STREAM_PACKET _IOW('#', 0x13, struct fw_cdev_send_stream_packet) 417 418/* available since kernel version 2.6.34 */ 419#define FW_CDEV_IOC_GET_CYCLE_TIMER2 _IOWR('#', 0x14, struct fw_cdev_get_cycle_timer2) 420 421/* available since kernel version 2.6.36 */ 422#define FW_CDEV_IOC_SEND_PHY_PACKET _IOWR('#', 0x15, struct fw_cdev_send_phy_packet) 423#define FW_CDEV_IOC_RECEIVE_PHY_PACKETS _IOW('#', 0x16, struct fw_cdev_receive_phy_packets) 424#define FW_CDEV_IOC_SET_ISO_CHANNELS _IOW('#', 0x17, struct fw_cdev_set_iso_channels) 425 426/* available since kernel version 3.4 */ 427#define FW_CDEV_IOC_FLUSH_ISO _IOW('#', 0x18, struct fw_cdev_flush_iso) 428 429/* 430 * ABI version history 431 * 1 (2.6.22) - initial version 432 * (2.6.24) - added %FW_CDEV_IOC_GET_CYCLE_TIMER 433 * 2 (2.6.30) - changed &fw_cdev_event_iso_interrupt.header if 434 * &fw_cdev_create_iso_context.header_size is 8 or more 435 * - added %FW_CDEV_IOC_*_ISO_RESOURCE*, 436 * %FW_CDEV_IOC_GET_SPEED, %FW_CDEV_IOC_SEND_BROADCAST_REQUEST, 437 * %FW_CDEV_IOC_SEND_STREAM_PACKET 438 * (2.6.32) - added time stamp to xmit &fw_cdev_event_iso_interrupt 439 * (2.6.33) - IR has always packet-per-buffer semantics now, not one of 440 * dual-buffer or packet-per-buffer depending on hardware 441 * - shared use and auto-response for FCP registers 442 * 3 (2.6.34) - made &fw_cdev_get_cycle_timer reliable 443 * - added %FW_CDEV_IOC_GET_CYCLE_TIMER2 444 * 4 (2.6.36) - added %FW_CDEV_EVENT_REQUEST2, %FW_CDEV_EVENT_PHY_PACKET_*, 445 * and &fw_cdev_allocate.region_end 446 * - implemented &fw_cdev_event_bus_reset.bm_node_id 447 * - added %FW_CDEV_IOC_SEND_PHY_PACKET, _RECEIVE_PHY_PACKETS 448 * - added %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL, 449 * %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL, and 450 * %FW_CDEV_IOC_SET_ISO_CHANNELS 451 * 5 (3.4) - send %FW_CDEV_EVENT_ISO_INTERRUPT events when needed to 452 * avoid dropping data 453 * - added %FW_CDEV_IOC_FLUSH_ISO 454 */ 455 456/** 457 * struct fw_cdev_get_info - General purpose information ioctl 458 * @version: The version field is just a running serial number. Both an 459 * input parameter (ABI version implemented by the client) and 460 * output parameter (ABI version implemented by the kernel). 461 * A client shall fill in the ABI @version for which the client 462 * was implemented. This is necessary for forward compatibility. 463 * @rom_length: If @rom is non-zero, up to @rom_length bytes of Configuration 464 * ROM will be copied into that user space address. In either 465 * case, @rom_length is updated with the actual length of the 466 * Configuration ROM. 467 * @rom: If non-zero, address of a buffer to be filled by a copy of the 468 * device's Configuration ROM 469 * @bus_reset: If non-zero, address of a buffer to be filled by a 470 * &struct fw_cdev_event_bus_reset with the current state 471 * of the bus. This does not cause a bus reset to happen. 472 * @bus_reset_closure: Value of &closure in this and subsequent bus reset events 473 * @card: The index of the card this device belongs to 474 * 475 * The %FW_CDEV_IOC_GET_INFO ioctl is usually the very first one which a client 476 * performs right after it opened a /dev/fw* file. 477 * 478 * As a side effect, reception of %FW_CDEV_EVENT_BUS_RESET events to be read(2) 479 * is started by this ioctl. 480 */ 481struct fw_cdev_get_info { 482 __u32 version; 483 __u32 rom_length; 484 __u64 rom; 485 __u64 bus_reset; 486 __u64 bus_reset_closure; 487 __u32 card; 488}; 489 490/** 491 * struct fw_cdev_send_request - Send an asynchronous request packet 492 * @tcode: Transaction code of the request 493 * @length: Length of outgoing payload, in bytes 494 * @offset: 48-bit offset at destination node 495 * @closure: Passed back to userspace in the response event 496 * @data: Userspace pointer to payload 497 * @generation: The bus generation where packet is valid 498 * 499 * Send a request to the device. This ioctl implements all outgoing requests. 500 * Both quadlet and block request specify the payload as a pointer to the data 501 * in the @data field. Once the transaction completes, the kernel writes an 502 * &fw_cdev_event_response event back. The @closure field is passed back to 503 * user space in the response event. 504 */ 505struct fw_cdev_send_request { 506 __u32 tcode; 507 __u32 length; 508 __u64 offset; 509 __u64 closure; 510 __u64 data; 511 __u32 generation; 512}; 513 514/** 515 * struct fw_cdev_send_response - Send an asynchronous response packet 516 * @rcode: Response code as determined by the userspace handler 517 * @length: Length of outgoing payload, in bytes 518 * @data: Userspace pointer to payload 519 * @handle: The handle from the &fw_cdev_event_request 520 * 521 * Send a response to an incoming request. By setting up an address range using 522 * the %FW_CDEV_IOC_ALLOCATE ioctl, userspace can listen for incoming requests. An 523 * incoming request will generate an %FW_CDEV_EVENT_REQUEST, and userspace must 524 * send a reply using this ioctl. The event has a handle to the kernel-side 525 * pending transaction, which should be used with this ioctl. 526 */ 527struct fw_cdev_send_response { 528 __u32 rcode; 529 __u32 length; 530 __u64 data; 531 __u32 handle; 532}; 533 534/** 535 * struct fw_cdev_allocate - Allocate a CSR in an address range 536 * @offset: Start offset of the address range 537 * @closure: To be passed back to userspace in request events 538 * @length: Length of the CSR, in bytes 539 * @handle: Handle to the allocation, written by the kernel 540 * @region_end: First address above the address range (added in ABI v4, 2.6.36) 541 * 542 * Allocate an address range in the 48-bit address space on the local node 543 * (the controller). This allows userspace to listen for requests with an 544 * offset within that address range. Every time when the kernel receives a 545 * request within the range, an &fw_cdev_event_request2 event will be emitted. 546 * (If the kernel or the client implements ABI version <= 3, an 547 * &fw_cdev_event_request will be generated instead.) 548 * 549 * The @closure field is passed back to userspace in these request events. 550 * The @handle field is an out parameter, returning a handle to the allocated 551 * range to be used for later deallocation of the range. 552 * 553 * The address range is allocated on all local nodes. The address allocation 554 * is exclusive except for the FCP command and response registers. If an 555 * exclusive address region is already in use, the ioctl fails with errno set 556 * to %EBUSY. 557 * 558 * If kernel and client implement ABI version >= 4, the kernel looks up a free 559 * spot of size @length inside [@offset..@region_end) and, if found, writes 560 * the start address of the new CSR back in @offset. I.e. @offset is an 561 * in and out parameter. If this automatic placement of a CSR in a bigger 562 * address range is not desired, the client simply needs to set @region_end 563 * = @offset + @length. 564 * 565 * If the kernel or the client implements ABI version <= 3, @region_end is 566 * ignored and effectively assumed to be @offset + @length. 567 * 568 * @region_end is only present in a kernel header >= 2.6.36. If necessary, 569 * this can for example be tested by #ifdef FW_CDEV_EVENT_REQUEST2. 570 */ 571struct fw_cdev_allocate { 572 __u64 offset; 573 __u64 closure; 574 __u32 length; 575 __u32 handle; 576 __u64 region_end; /* available since kernel version 2.6.36 */ 577}; 578 579/** 580 * struct fw_cdev_deallocate - Free a CSR address range or isochronous resource 581 * @handle: Handle to the address range or iso resource, as returned by the 582 * kernel when the range or resource was allocated 583 */ 584struct fw_cdev_deallocate { 585 __u32 handle; 586}; 587 588#define FW_CDEV_LONG_RESET 0 589#define FW_CDEV_SHORT_RESET 1 590 591/** 592 * struct fw_cdev_initiate_bus_reset - Initiate a bus reset 593 * @type: %FW_CDEV_SHORT_RESET or %FW_CDEV_LONG_RESET 594 * 595 * Initiate a bus reset for the bus this device is on. The bus reset can be 596 * either the original (long) bus reset or the arbitrated (short) bus reset 597 * introduced in 1394a-2000. 598 * 599 * The ioctl returns immediately. A subsequent &fw_cdev_event_bus_reset 600 * indicates when the reset actually happened. Since ABI v4, this may be 601 * considerably later than the ioctl because the kernel ensures a grace period 602 * between subsequent bus resets as per IEEE 1394 bus management specification. 603 */ 604struct fw_cdev_initiate_bus_reset { 605 __u32 type; 606}; 607 608/** 609 * struct fw_cdev_add_descriptor - Add contents to the local node's config ROM 610 * @immediate: If non-zero, immediate key to insert before pointer 611 * @key: Upper 8 bits of root directory pointer 612 * @data: Userspace pointer to contents of descriptor block 613 * @length: Length of descriptor block data, in quadlets 614 * @handle: Handle to the descriptor, written by the kernel 615 * 616 * Add a descriptor block and optionally a preceding immediate key to the local 617 * node's Configuration ROM. 618 * 619 * The @key field specifies the upper 8 bits of the descriptor root directory 620 * pointer and the @data and @length fields specify the contents. The @key 621 * should be of the form 0xXX000000. The offset part of the root directory entry 622 * will be filled in by the kernel. 623 * 624 * If not 0, the @immediate field specifies an immediate key which will be 625 * inserted before the root directory pointer. 626 * 627 * @immediate, @key, and @data array elements are CPU-endian quadlets. 628 * 629 * If successful, the kernel adds the descriptor and writes back a @handle to 630 * the kernel-side object to be used for later removal of the descriptor block 631 * and immediate key. The kernel will also generate a bus reset to signal the 632 * change of the Configuration ROM to other nodes. 633 * 634 * This ioctl affects the Configuration ROMs of all local nodes. 635 * The ioctl only succeeds on device files which represent a local node. 636 */ 637struct fw_cdev_add_descriptor { 638 __u32 immediate; 639 __u32 key; 640 __u64 data; 641 __u32 length; 642 __u32 handle; 643}; 644 645/** 646 * struct fw_cdev_remove_descriptor - Remove contents from the Configuration ROM 647 * @handle: Handle to the descriptor, as returned by the kernel when the 648 * descriptor was added 649 * 650 * Remove a descriptor block and accompanying immediate key from the local 651 * nodes' Configuration ROMs. The kernel will also generate a bus reset to 652 * signal the change of the Configuration ROM to other nodes. 653 */ 654struct fw_cdev_remove_descriptor { 655 __u32 handle; 656}; 657 658#define FW_CDEV_ISO_CONTEXT_TRANSMIT 0 659#define FW_CDEV_ISO_CONTEXT_RECEIVE 1 660#define FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL 2 /* added in 2.6.36 */ 661 662/** 663 * struct fw_cdev_create_iso_context - Create a context for isochronous I/O 664 * @type: %FW_CDEV_ISO_CONTEXT_TRANSMIT or %FW_CDEV_ISO_CONTEXT_RECEIVE or 665 * %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL 666 * @header_size: Header size to strip in single-channel reception 667 * @channel: Channel to bind to in single-channel reception or transmission 668 * @speed: Transmission speed 669 * @closure: To be returned in &fw_cdev_event_iso_interrupt or 670 * &fw_cdev_event_iso_interrupt_multichannel 671 * @handle: Handle to context, written back by kernel 672 * 673 * Prior to sending or receiving isochronous I/O, a context must be created. 674 * The context records information about the transmit or receive configuration 675 * and typically maps to an underlying hardware resource. A context is set up 676 * for either sending or receiving. It is bound to a specific isochronous 677 * @channel. 678 * 679 * In case of multichannel reception, @header_size and @channel are ignored 680 * and the channels are selected by %FW_CDEV_IOC_SET_ISO_CHANNELS. 681 * 682 * For %FW_CDEV_ISO_CONTEXT_RECEIVE contexts, @header_size must be at least 4 683 * and must be a multiple of 4. It is ignored in other context types. 684 * 685 * @speed is ignored in receive context types. 686 * 687 * If a context was successfully created, the kernel writes back a handle to the 688 * context, which must be passed in for subsequent operations on that context. 689 * 690 * Limitations: 691 * No more than one iso context can be created per fd. 692 * The total number of contexts that all userspace and kernelspace drivers can 693 * create on a card at a time is a hardware limit, typically 4 or 8 contexts per 694 * direction, and of them at most one multichannel receive context. 695 */ 696struct fw_cdev_create_iso_context { 697 __u32 type; 698 __u32 header_size; 699 __u32 channel; 700 __u32 speed; 701 __u64 closure; 702 __u32 handle; 703}; 704 705/** 706 * struct fw_cdev_set_iso_channels - Select channels in multichannel reception 707 * @channels: Bitmask of channels to listen to 708 * @handle: Handle of the mutichannel receive context 709 * 710 * @channels is the bitwise or of 1ULL << n for each channel n to listen to. 711 * 712 * The ioctl fails with errno %EBUSY if there is already another receive context 713 * on a channel in @channels. In that case, the bitmask of all unoccupied 714 * channels is returned in @channels. 715 */ 716struct fw_cdev_set_iso_channels { 717 __u64 channels; 718 __u32 handle; 719}; 720 721#define FW_CDEV_ISO_PAYLOAD_LENGTH(v) (v) 722#define FW_CDEV_ISO_INTERRUPT (1 << 16) 723#define FW_CDEV_ISO_SKIP (1 << 17) 724#define FW_CDEV_ISO_SYNC (1 << 17) 725#define FW_CDEV_ISO_TAG(v) ((v) << 18) 726#define FW_CDEV_ISO_SY(v) ((v) << 20) 727#define FW_CDEV_ISO_HEADER_LENGTH(v) ((v) << 24) 728 729/** 730 * struct fw_cdev_iso_packet - Isochronous packet 731 * @control: Contains the header length (8 uppermost bits), 732 * the sy field (4 bits), the tag field (2 bits), a sync flag 733 * or a skip flag (1 bit), an interrupt flag (1 bit), and the 734 * payload length (16 lowermost bits) 735 * @header: Header and payload in case of a transmit context. 736 * 737 * &struct fw_cdev_iso_packet is used to describe isochronous packet queues. 738 * Use the FW_CDEV_ISO_ macros to fill in @control. 739 * The @header array is empty in case of receive contexts. 740 * 741 * Context type %FW_CDEV_ISO_CONTEXT_TRANSMIT: 742 * 743 * @control.HEADER_LENGTH must be a multiple of 4. It specifies the numbers of 744 * bytes in @header that will be prepended to the packet's payload. These bytes 745 * are copied into the kernel and will not be accessed after the ioctl has 746 * returned. 747 * 748 * The @control.SY and TAG fields are copied to the iso packet header. These 749 * fields are specified by IEEE 1394a and IEC 61883-1. 750 * 751 * The @control.SKIP flag specifies that no packet is to be sent in a frame. 752 * When using this, all other fields except @control.INTERRUPT must be zero. 753 * 754 * When a packet with the @control.INTERRUPT flag set has been completed, an 755 * &fw_cdev_event_iso_interrupt event will be sent. 756 * 757 * Context type %FW_CDEV_ISO_CONTEXT_RECEIVE: 758 * 759 * @control.HEADER_LENGTH must be a multiple of the context's header_size. 760 * If the HEADER_LENGTH is larger than the context's header_size, multiple 761 * packets are queued for this entry. 762 * 763 * The @control.SY and TAG fields are ignored. 764 * 765 * If the @control.SYNC flag is set, the context drops all packets until a 766 * packet with a sy field is received which matches &fw_cdev_start_iso.sync. 767 * 768 * @control.PAYLOAD_LENGTH defines how many payload bytes can be received for 769 * one packet (in addition to payload quadlets that have been defined as headers 770 * and are stripped and returned in the &fw_cdev_event_iso_interrupt structure). 771 * If more bytes are received, the additional bytes are dropped. If less bytes 772 * are received, the remaining bytes in this part of the payload buffer will not 773 * be written to, not even by the next packet. I.e., packets received in 774 * consecutive frames will not necessarily be consecutive in memory. If an 775 * entry has queued multiple packets, the PAYLOAD_LENGTH is divided equally 776 * among them. 777 * 778 * When a packet with the @control.INTERRUPT flag set has been completed, an 779 * &fw_cdev_event_iso_interrupt event will be sent. An entry that has queued 780 * multiple receive packets is completed when its last packet is completed. 781 * 782 * Context type %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL: 783 * 784 * Here, &fw_cdev_iso_packet would be more aptly named _iso_buffer_chunk since 785 * it specifies a chunk of the mmap()'ed buffer, while the number and alignment 786 * of packets to be placed into the buffer chunk is not known beforehand. 787 * 788 * @control.PAYLOAD_LENGTH is the size of the buffer chunk and specifies room 789 * for header, payload, padding, and trailer bytes of one or more packets. 790 * It must be a multiple of 4. 791 * 792 * @control.HEADER_LENGTH, TAG and SY are ignored. SYNC is treated as described 793 * for single-channel reception. 794 * 795 * When a buffer chunk with the @control.INTERRUPT flag set has been filled 796 * entirely, an &fw_cdev_event_iso_interrupt_mc event will be sent. 797 */ 798struct fw_cdev_iso_packet { 799 __u32 control; 800 __u32 header[0]; 801}; 802 803/** 804 * struct fw_cdev_queue_iso - Queue isochronous packets for I/O 805 * @packets: Userspace pointer to an array of &fw_cdev_iso_packet 806 * @data: Pointer into mmap()'ed payload buffer 807 * @size: Size of the @packets array, in bytes 808 * @handle: Isochronous context handle 809 * 810 * Queue a number of isochronous packets for reception or transmission. 811 * This ioctl takes a pointer to an array of &fw_cdev_iso_packet structs, 812 * which describe how to transmit from or receive into a contiguous region 813 * of a mmap()'ed payload buffer. As part of transmit packet descriptors, 814 * a series of headers can be supplied, which will be prepended to the 815 * payload during DMA. 816 * 817 * The kernel may or may not queue all packets, but will write back updated 818 * values of the @packets, @data and @size fields, so the ioctl can be 819 * resubmitted easily. 820 * 821 * In case of a multichannel receive context, @data must be quadlet-aligned 822 * relative to the buffer start. 823 */ 824struct fw_cdev_queue_iso { 825 __u64 packets; 826 __u64 data; 827 __u32 size; 828 __u32 handle; 829}; 830 831#define FW_CDEV_ISO_CONTEXT_MATCH_TAG0 1 832#define FW_CDEV_ISO_CONTEXT_MATCH_TAG1 2 833#define FW_CDEV_ISO_CONTEXT_MATCH_TAG2 4 834#define FW_CDEV_ISO_CONTEXT_MATCH_TAG3 8 835#define FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS 15 836 837/** 838 * struct fw_cdev_start_iso - Start an isochronous transmission or reception 839 * @cycle: Cycle in which to start I/O. If @cycle is greater than or 840 * equal to 0, the I/O will start on that cycle. 841 * @sync: Determines the value to wait for for receive packets that have 842 * the %FW_CDEV_ISO_SYNC bit set 843 * @tags: Tag filter bit mask. Only valid for isochronous reception. 844 * Determines the tag values for which packets will be accepted. 845 * Use FW_CDEV_ISO_CONTEXT_MATCH_ macros to set @tags. 846 * @handle: Isochronous context handle within which to transmit or receive 847 */ 848struct fw_cdev_start_iso { 849 __s32 cycle; 850 __u32 sync; 851 __u32 tags; 852 __u32 handle; 853}; 854 855/** 856 * struct fw_cdev_stop_iso - Stop an isochronous transmission or reception 857 * @handle: Handle of isochronous context to stop 858 */ 859struct fw_cdev_stop_iso { 860 __u32 handle; 861}; 862 863/** 864 * struct fw_cdev_flush_iso - flush completed iso packets 865 * @handle: handle of isochronous context to flush 866 * 867 * For %FW_CDEV_ISO_CONTEXT_TRANSMIT or %FW_CDEV_ISO_CONTEXT_RECEIVE contexts, 868 * report any completed packets. 869 * 870 * For %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL contexts, report the current 871 * offset in the receive buffer, if it has changed; this is typically in the 872 * middle of some buffer chunk. 873 * 874 * Any %FW_CDEV_EVENT_ISO_INTERRUPT or %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL 875 * events generated by this ioctl are sent synchronously, i.e., are available 876 * for reading from the file descriptor when this ioctl returns. 877 */ 878struct fw_cdev_flush_iso { 879 __u32 handle; 880}; 881 882/** 883 * struct fw_cdev_get_cycle_timer - read cycle timer register 884 * @local_time: system time, in microseconds since the Epoch 885 * @cycle_timer: Cycle Time register contents 886 * 887 * Same as %FW_CDEV_IOC_GET_CYCLE_TIMER2, but fixed to use %CLOCK_REALTIME 888 * and only with microseconds resolution. 889 * 890 * In version 1 and 2 of the ABI, this ioctl returned unreliable (non- 891 * monotonic) @cycle_timer values on certain controllers. 892 */ 893struct fw_cdev_get_cycle_timer { 894 __u64 local_time; 895 __u32 cycle_timer; 896}; 897 898/** 899 * struct fw_cdev_get_cycle_timer2 - read cycle timer register 900 * @tv_sec: system time, seconds 901 * @tv_nsec: system time, sub-seconds part in nanoseconds 902 * @clk_id: input parameter, clock from which to get the system time 903 * @cycle_timer: Cycle Time register contents 904 * 905 * The %FW_CDEV_IOC_GET_CYCLE_TIMER2 ioctl reads the isochronous cycle timer 906 * and also the system clock. This allows to correlate reception time of 907 * isochronous packets with system time. 908 * 909 * @clk_id lets you choose a clock like with POSIX' clock_gettime function. 910 * Supported @clk_id values are POSIX' %CLOCK_REALTIME and %CLOCK_MONOTONIC 911 * and Linux' %CLOCK_MONOTONIC_RAW. 912 * 913 * @cycle_timer consists of 7 bits cycleSeconds, 13 bits cycleCount, and 914 * 12 bits cycleOffset, in host byte order. Cf. the Cycle Time register 915 * per IEEE 1394 or Isochronous Cycle Timer register per OHCI-1394. 916 */ 917struct fw_cdev_get_cycle_timer2 { 918 __s64 tv_sec; 919 __s32 tv_nsec; 920 __s32 clk_id; 921 __u32 cycle_timer; 922}; 923 924/** 925 * struct fw_cdev_allocate_iso_resource - (De)allocate a channel or bandwidth 926 * @closure: Passed back to userspace in corresponding iso resource events 927 * @channels: Isochronous channels of which one is to be (de)allocated 928 * @bandwidth: Isochronous bandwidth units to be (de)allocated 929 * @handle: Handle to the allocation, written by the kernel (only valid in 930 * case of %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE ioctls) 931 * 932 * The %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE ioctl initiates allocation of an 933 * isochronous channel and/or of isochronous bandwidth at the isochronous 934 * resource manager (IRM). Only one of the channels specified in @channels is 935 * allocated. An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED is sent after 936 * communication with the IRM, indicating success or failure in the event data. 937 * The kernel will automatically reallocate the resources after bus resets. 938 * Should a reallocation fail, an %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event 939 * will be sent. The kernel will also automatically deallocate the resources 940 * when the file descriptor is closed. 941 * 942 * The %FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE ioctl can be used to initiate 943 * deallocation of resources which were allocated as described above. 944 * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event concludes this operation. 945 * 946 * The %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE ioctl is a variant of allocation 947 * without automatic re- or deallocation. 948 * An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED event concludes this operation, 949 * indicating success or failure in its data. 950 * 951 * The %FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE_ONCE ioctl works like 952 * %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE except that resources are freed 953 * instead of allocated. 954 * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event concludes this operation. 955 * 956 * To summarize, %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE allocates iso resources 957 * for the lifetime of the fd or @handle. 958 * In contrast, %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE allocates iso resources 959 * for the duration of a bus generation. 960 * 961 * @channels is a host-endian bitfield with the least significant bit 962 * representing channel 0 and the most significant bit representing channel 63: 963 * 1ULL << c for each channel c that is a candidate for (de)allocation. 964 * 965 * @bandwidth is expressed in bandwidth allocation units, i.e. the time to send 966 * one quadlet of data (payload or header data) at speed S1600. 967 */ 968struct fw_cdev_allocate_iso_resource { 969 __u64 closure; 970 __u64 channels; 971 __u32 bandwidth; 972 __u32 handle; 973}; 974 975/** 976 * struct fw_cdev_send_stream_packet - send an asynchronous stream packet 977 * @length: Length of outgoing payload, in bytes 978 * @tag: Data format tag 979 * @channel: Isochronous channel to transmit to 980 * @sy: Synchronization code 981 * @closure: Passed back to userspace in the response event 982 * @data: Userspace pointer to payload 983 * @generation: The bus generation where packet is valid 984 * @speed: Speed to transmit at 985 * 986 * The %FW_CDEV_IOC_SEND_STREAM_PACKET ioctl sends an asynchronous stream packet 987 * to every device which is listening to the specified channel. The kernel 988 * writes an &fw_cdev_event_response event which indicates success or failure of 989 * the transmission. 990 */ 991struct fw_cdev_send_stream_packet { 992 __u32 length; 993 __u32 tag; 994 __u32 channel; 995 __u32 sy; 996 __u64 closure; 997 __u64 data; 998 __u32 generation; 999 __u32 speed; 1000}; 1001 1002/** 1003 * struct fw_cdev_send_phy_packet - send a PHY packet 1004 * @closure: Passed back to userspace in the PHY-packet-sent event 1005 * @data: First and second quadlet of the PHY packet 1006 * @generation: The bus generation where packet is valid 1007 * 1008 * The %FW_CDEV_IOC_SEND_PHY_PACKET ioctl sends a PHY packet to all nodes 1009 * on the same card as this device. After transmission, an 1010 * %FW_CDEV_EVENT_PHY_PACKET_SENT event is generated. 1011 * 1012 * The payload @data[] shall be specified in host byte order. Usually, 1013 * @data[1] needs to be the bitwise inverse of @data[0]. VersaPHY packets 1014 * are an exception to this rule. 1015 * 1016 * The ioctl is only permitted on device files which represent a local node. 1017 */ 1018struct fw_cdev_send_phy_packet { 1019 __u64 closure; 1020 __u32 data[2]; 1021 __u32 generation; 1022}; 1023 1024/** 1025 * struct fw_cdev_receive_phy_packets - start reception of PHY packets 1026 * @closure: Passed back to userspace in phy packet events 1027 * 1028 * This ioctl activates issuing of %FW_CDEV_EVENT_PHY_PACKET_RECEIVED due to 1029 * incoming PHY packets from any node on the same bus as the device. 1030 * 1031 * The ioctl is only permitted on device files which represent a local node. 1032 */ 1033struct fw_cdev_receive_phy_packets { 1034 __u64 closure; 1035}; 1036 1037#define FW_CDEV_VERSION 3 /* Meaningless legacy macro; don't use it. */ 1038 1039#endif /* _LINUX_FIREWIRE_CDEV_H */ 1040