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 /* available since kernel version 6.5 */ 50 #define FW_CDEV_EVENT_REQUEST3 0x0a 51 #define FW_CDEV_EVENT_RESPONSE2 0x0b 52 #define FW_CDEV_EVENT_PHY_PACKET_SENT2 0x0c 53 #define FW_CDEV_EVENT_PHY_PACKET_RECEIVED2 0x0d 54 55 /** 56 * struct fw_cdev_event_common - Common part of all fw_cdev_event_* types 57 * @closure: For arbitrary use by userspace 58 * @type: Discriminates the fw_cdev_event_* types 59 * 60 * This struct may be used to access generic members of all fw_cdev_event_* 61 * types regardless of the specific type. 62 * 63 * Data passed in the @closure field for a request will be returned in the 64 * corresponding event. It is big enough to hold a pointer on all platforms. 65 * The ioctl used to set @closure depends on the @type of event. 66 */ 67 struct fw_cdev_event_common { 68 __u64 closure; 69 __u32 type; 70 }; 71 72 /** 73 * struct fw_cdev_event_bus_reset - Sent when a bus reset occurred 74 * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_GET_INFO ioctl 75 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_BUS_RESET 76 * @node_id: New node ID of this node 77 * @local_node_id: Node ID of the local node, i.e. of the controller 78 * @bm_node_id: Node ID of the bus manager 79 * @irm_node_id: Node ID of the iso resource manager 80 * @root_node_id: Node ID of the root node 81 * @generation: New bus generation 82 * 83 * This event is sent when the bus the device belongs to goes through a bus 84 * reset. It provides information about the new bus configuration, such as 85 * new node ID for this device, new root ID, and others. 86 * 87 * If @bm_node_id is 0xffff right after bus reset it can be reread by an 88 * %FW_CDEV_IOC_GET_INFO ioctl after bus manager selection was finished. 89 * Kernels with ABI version < 4 do not set @bm_node_id. 90 */ 91 struct fw_cdev_event_bus_reset { 92 __u64 closure; 93 __u32 type; 94 __u32 node_id; 95 __u32 local_node_id; 96 __u32 bm_node_id; 97 __u32 irm_node_id; 98 __u32 root_node_id; 99 __u32 generation; 100 }; 101 102 /** 103 * struct fw_cdev_event_response - Sent when a response packet was received 104 * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_SEND_REQUEST 105 * or %FW_CDEV_IOC_SEND_BROADCAST_REQUEST 106 * or %FW_CDEV_IOC_SEND_STREAM_PACKET ioctl 107 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_RESPONSE 108 * @rcode: Response code returned by the remote node 109 * @length: Data length, i.e. the response's payload size in bytes 110 * @data: Payload data, if any 111 * 112 * This event is sent instead of &fw_cdev_event_response if the kernel or the client implements 113 * ABI version <= 5. It has the lack of time stamp field comparing to &fw_cdev_event_response2. 114 */ 115 struct fw_cdev_event_response { 116 __u64 closure; 117 __u32 type; 118 __u32 rcode; 119 __u32 length; 120 __u32 data[]; 121 }; 122 123 /** 124 * struct fw_cdev_event_response2 - Sent when a response packet was received 125 * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_SEND_REQUEST 126 * or %FW_CDEV_IOC_SEND_BROADCAST_REQUEST 127 * or %FW_CDEV_IOC_SEND_STREAM_PACKET ioctl 128 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_RESPONSE 129 * @rcode: Response code returned by the remote node 130 * @length: Data length, i.e. the response's payload size in bytes 131 * @request_tstamp: The time stamp of isochronous cycle at which the request was sent. 132 * @response_tstamp: The time stamp of isochronous cycle at which the response was sent. 133 * @padding: Padding to keep the size of structure as multiples of 8 in various architectures 134 * since 4 byte alignment is used for 8 byte of object type in System V ABI for i386 135 * architecture. 136 * @data: Payload data, if any 137 * 138 * This event is sent when the stack receives a response to an outgoing request 139 * sent by %FW_CDEV_IOC_SEND_REQUEST ioctl. The payload data for responses 140 * carrying data (read and lock responses) follows immediately and can be 141 * accessed through the @data field. 142 * 143 * The event is also generated after conclusions of transactions that do not 144 * involve response packets. This includes unified write transactions, 145 * broadcast write transactions, and transmission of asynchronous stream 146 * packets. @rcode indicates success or failure of such transmissions. 147 * 148 * The value of @request_tstamp expresses the isochronous cycle at which the request was sent to 149 * initiate the transaction. The value of @response_tstamp expresses the isochronous cycle at which 150 * the response arrived to complete the transaction. Each value is unsigned 16 bit integer 151 * containing three low order bits of second field and all 13 bits of cycle field in format of 152 * CYCLE_TIMER register. 153 */ 154 struct fw_cdev_event_response2 { 155 __u64 closure; 156 __u32 type; 157 __u32 rcode; 158 __u32 length; 159 __u32 request_tstamp; 160 __u32 response_tstamp; 161 __u32 padding; 162 __u32 data[]; 163 }; 164 165 /** 166 * struct fw_cdev_event_request - Old version of &fw_cdev_event_request2 167 * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_ALLOCATE ioctl 168 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_REQUEST 169 * @tcode: Transaction code of the incoming request 170 * @offset: The offset into the 48-bit per-node address space 171 * @handle: Reference to the kernel-side pending request 172 * @length: Data length, i.e. the request's payload size in bytes 173 * @data: Incoming data, if any 174 * 175 * This event is sent instead of &fw_cdev_event_request2 if the kernel or 176 * the client implements ABI version <= 3. &fw_cdev_event_request lacks 177 * essential information; use &fw_cdev_event_request2 instead. 178 */ 179 struct fw_cdev_event_request { 180 __u64 closure; 181 __u32 type; 182 __u32 tcode; 183 __u64 offset; 184 __u32 handle; 185 __u32 length; 186 __u32 data[]; 187 }; 188 189 /** 190 * struct fw_cdev_event_request2 - Sent on incoming request to an address region 191 * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_ALLOCATE ioctl 192 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_REQUEST2 193 * @tcode: Transaction code of the incoming request 194 * @offset: The offset into the 48-bit per-node address space 195 * @source_node_id: Sender node ID 196 * @destination_node_id: Destination node ID 197 * @card: The index of the card from which the request came 198 * @generation: Bus generation in which the request is valid 199 * @handle: Reference to the kernel-side pending request 200 * @length: Data length, i.e. the request's payload size in bytes 201 * @data: Incoming data, if any 202 * 203 * This event is sent instead of &fw_cdev_event_request3 if the kernel or the client implements 204 * ABI version <= 5. It has the lack of time stamp field comparing to &fw_cdev_event_request3. 205 */ 206 struct fw_cdev_event_request2 { 207 __u64 closure; 208 __u32 type; 209 __u32 tcode; 210 __u64 offset; 211 __u32 source_node_id; 212 __u32 destination_node_id; 213 __u32 card; 214 __u32 generation; 215 __u32 handle; 216 __u32 length; 217 __u32 data[]; 218 }; 219 220 /** 221 * struct fw_cdev_event_request3 - Sent on incoming request to an address region 222 * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_ALLOCATE ioctl 223 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_REQUEST2 224 * @tcode: Transaction code of the incoming request 225 * @offset: The offset into the 48-bit per-node address space 226 * @source_node_id: Sender node ID 227 * @destination_node_id: Destination node ID 228 * @card: The index of the card from which the request came 229 * @generation: Bus generation in which the request is valid 230 * @handle: Reference to the kernel-side pending request 231 * @length: Data length, i.e. the request's payload size in bytes 232 * @tstamp: The time stamp of isochronous cycle at which the request arrived. 233 * @padding: Padding to keep the size of structure as multiples of 8 in various architectures 234 * since 4 byte alignment is used for 8 byte of object type in System V ABI for i386 235 * architecture. 236 * @data: Incoming data, if any 237 * 238 * This event is sent when the stack receives an incoming request to an address 239 * region registered using the %FW_CDEV_IOC_ALLOCATE ioctl. The request is 240 * guaranteed to be completely contained in the specified region. Userspace is 241 * responsible for sending the response by %FW_CDEV_IOC_SEND_RESPONSE ioctl, 242 * using the same @handle. 243 * 244 * The payload data for requests carrying data (write and lock requests) 245 * follows immediately and can be accessed through the @data field. 246 * 247 * Unlike &fw_cdev_event_request, @tcode of lock requests is one of the 248 * firewire-core specific %TCODE_LOCK_MASK_SWAP...%TCODE_LOCK_VENDOR_DEPENDENT, 249 * i.e. encodes the extended transaction code. 250 * 251 * @card may differ from &fw_cdev_get_info.card because requests are received 252 * from all cards of the Linux host. @source_node_id, @destination_node_id, and 253 * @generation pertain to that card. Destination node ID and bus generation may 254 * therefore differ from the corresponding fields of the last 255 * &fw_cdev_event_bus_reset. 256 * 257 * @destination_node_id may also differ from the current node ID because of a 258 * non-local bus ID part or in case of a broadcast write request. Note, a 259 * client must call an %FW_CDEV_IOC_SEND_RESPONSE ioctl even in case of a 260 * broadcast write request; the kernel will then release the kernel-side pending 261 * request but will not actually send a response packet. 262 * 263 * In case of a write request to FCP_REQUEST or FCP_RESPONSE, the kernel already 264 * sent a write response immediately after the request was received; in this 265 * case the client must still call an %FW_CDEV_IOC_SEND_RESPONSE ioctl to 266 * release the kernel-side pending request, though another response won't be 267 * sent. 268 * 269 * If the client subsequently needs to initiate requests to the sender node of 270 * an &fw_cdev_event_request3, it needs to use a device file with matching 271 * card index, node ID, and generation for outbound requests. 272 * 273 * @tstamp is isochronous cycle at which the request arrived. It is 16 bit integer value and the 274 * higher 3 bits expresses three low order bits of second field in the format of CYCLE_TIME 275 * register and the rest 13 bits expresses cycle field. 276 */ 277 struct fw_cdev_event_request3 { 278 __u64 closure; 279 __u32 type; 280 __u32 tcode; 281 __u64 offset; 282 __u32 source_node_id; 283 __u32 destination_node_id; 284 __u32 card; 285 __u32 generation; 286 __u32 handle; 287 __u32 length; 288 __u32 tstamp; 289 __u32 padding; 290 __u32 data[]; 291 }; 292 293 /** 294 * struct fw_cdev_event_iso_interrupt - Sent when an iso packet was completed 295 * @closure: See &fw_cdev_event_common; 296 * set by %FW_CDEV_CREATE_ISO_CONTEXT ioctl 297 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_ISO_INTERRUPT 298 * @cycle: Cycle counter of the last completed packet 299 * @header_length: Total length of following headers, in bytes 300 * @header: Stripped headers, if any 301 * 302 * This event is sent when the controller has completed an &fw_cdev_iso_packet 303 * with the %FW_CDEV_ISO_INTERRUPT bit set, when explicitly requested with 304 * %FW_CDEV_IOC_FLUSH_ISO, or when there have been so many completed packets 305 * without the interrupt bit set that the kernel's internal buffer for @header 306 * is about to overflow. (In the last case, ABI versions < 5 drop header data 307 * up to the next interrupt packet.) 308 * 309 * Isochronous transmit events (context type %FW_CDEV_ISO_CONTEXT_TRANSMIT): 310 * 311 * In version 3 and some implementations of version 2 of the ABI, &header_length 312 * is a multiple of 4 and &header contains timestamps of all packets up until 313 * the interrupt packet. The format of the timestamps is as described below for 314 * isochronous reception. In version 1 of the ABI, &header_length was 0. 315 * 316 * Isochronous receive events (context type %FW_CDEV_ISO_CONTEXT_RECEIVE): 317 * 318 * The headers stripped of all packets up until and including the interrupt 319 * packet are returned in the @header field. The amount of header data per 320 * packet is as specified at iso context creation by 321 * &fw_cdev_create_iso_context.header_size. 322 * 323 * Hence, _interrupt.header_length / _context.header_size is the number of 324 * packets received in this interrupt event. The client can now iterate 325 * through the mmap()'ed DMA buffer according to this number of packets and 326 * to the buffer sizes as the client specified in &fw_cdev_queue_iso. 327 * 328 * Since version 2 of this ABI, the portion for each packet in _interrupt.header 329 * consists of the 1394 isochronous packet header, followed by a timestamp 330 * quadlet if &fw_cdev_create_iso_context.header_size > 4, followed by quadlets 331 * from the packet payload if &fw_cdev_create_iso_context.header_size > 8. 332 * 333 * Format of 1394 iso packet header: 16 bits data_length, 2 bits tag, 6 bits 334 * channel, 4 bits tcode, 4 bits sy, in big endian byte order. 335 * data_length is the actual received size of the packet without the four 336 * 1394 iso packet header bytes. 337 * 338 * Format of timestamp: 16 bits invalid, 3 bits cycleSeconds, 13 bits 339 * cycleCount, in big endian byte order. 340 * 341 * In version 1 of the ABI, no timestamp quadlet was inserted; instead, payload 342 * data followed directly after the 1394 is header if header_size > 4. 343 * Behaviour of ver. 1 of this ABI is no longer available since ABI ver. 2. 344 */ 345 struct fw_cdev_event_iso_interrupt { 346 __u64 closure; 347 __u32 type; 348 __u32 cycle; 349 __u32 header_length; 350 __u32 header[]; 351 }; 352 353 /** 354 * struct fw_cdev_event_iso_interrupt_mc - An iso buffer chunk was completed 355 * @closure: See &fw_cdev_event_common; 356 * set by %FW_CDEV_CREATE_ISO_CONTEXT ioctl 357 * @type: %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL 358 * @completed: Offset into the receive buffer; data before this offset is valid 359 * 360 * This event is sent in multichannel contexts (context type 361 * %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL) for &fw_cdev_iso_packet buffer 362 * chunks that have been completely filled and that have the 363 * %FW_CDEV_ISO_INTERRUPT bit set, or when explicitly requested with 364 * %FW_CDEV_IOC_FLUSH_ISO. 365 * 366 * The buffer is continuously filled with the following data, per packet: 367 * - the 1394 iso packet header as described at &fw_cdev_event_iso_interrupt, 368 * but in little endian byte order, 369 * - packet payload (as many bytes as specified in the data_length field of 370 * the 1394 iso packet header) in big endian byte order, 371 * - 0...3 padding bytes as needed to align the following trailer quadlet, 372 * - trailer quadlet, containing the reception timestamp as described at 373 * &fw_cdev_event_iso_interrupt, but in little endian byte order. 374 * 375 * Hence the per-packet size is data_length (rounded up to a multiple of 4) + 8. 376 * When processing the data, stop before a packet that would cross the 377 * @completed offset. 378 * 379 * A packet near the end of a buffer chunk will typically spill over into the 380 * next queued buffer chunk. It is the responsibility of the client to check 381 * for this condition, assemble a broken-up packet from its parts, and not to 382 * re-queue any buffer chunks in which as yet unread packet parts reside. 383 */ 384 struct fw_cdev_event_iso_interrupt_mc { 385 __u64 closure; 386 __u32 type; 387 __u32 completed; 388 }; 389 390 /** 391 * struct fw_cdev_event_iso_resource - Iso resources were allocated or freed 392 * @closure: See &fw_cdev_event_common; 393 * set by``FW_CDEV_IOC_(DE)ALLOCATE_ISO_RESOURCE(_ONCE)`` ioctl 394 * @type: %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED or 395 * %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED 396 * @handle: Reference by which an allocated resource can be deallocated 397 * @channel: Isochronous channel which was (de)allocated, if any 398 * @bandwidth: Bandwidth allocation units which were (de)allocated, if any 399 * 400 * An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED event is sent after an isochronous 401 * resource was allocated at the IRM. The client has to check @channel and 402 * @bandwidth for whether the allocation actually succeeded. 403 * 404 * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event is sent after an isochronous 405 * resource was deallocated at the IRM. It is also sent when automatic 406 * reallocation after a bus reset failed. 407 * 408 * @channel is <0 if no channel was (de)allocated or if reallocation failed. 409 * @bandwidth is 0 if no bandwidth was (de)allocated or if reallocation failed. 410 */ 411 struct fw_cdev_event_iso_resource { 412 __u64 closure; 413 __u32 type; 414 __u32 handle; 415 __s32 channel; 416 __s32 bandwidth; 417 }; 418 419 /** 420 * struct fw_cdev_event_phy_packet - A PHY packet was transmitted or received 421 * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_SEND_PHY_PACKET 422 * or %FW_CDEV_IOC_RECEIVE_PHY_PACKETS ioctl 423 * @type: %FW_CDEV_EVENT_PHY_PACKET_SENT or %..._RECEIVED 424 * @rcode: %RCODE_..., indicates success or failure of transmission 425 * @length: Data length in bytes 426 * @data: Incoming data for %FW_CDEV_IOC_RECEIVE_PHY_PACKETS. For %FW_CDEV_IOC_SEND_PHY_PACKET 427 * the field has the same data in the request, thus the length of 8 bytes. 428 * 429 * This event is sent instead of &fw_cdev_event_phy_packet2 if the kernel or 430 * the client implements ABI version <= 5. It has the lack of time stamp field comparing to 431 * &fw_cdev_event_phy_packet2. 432 */ 433 struct fw_cdev_event_phy_packet { 434 __u64 closure; 435 __u32 type; 436 __u32 rcode; 437 __u32 length; 438 __u32 data[]; 439 }; 440 441 /** 442 * struct fw_cdev_event_phy_packet2 - A PHY packet was transmitted or received with time stamp. 443 * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_SEND_PHY_PACKET 444 * or %FW_CDEV_IOC_RECEIVE_PHY_PACKETS ioctl 445 * @type: %FW_CDEV_EVENT_PHY_PACKET_SENT2 or %FW_CDEV_EVENT_PHY_PACKET_RECEIVED2 446 * @rcode: %RCODE_..., indicates success or failure of transmission 447 * @length: Data length in bytes 448 * @tstamp: For %FW_CDEV_EVENT_PHY_PACKET_RECEIVED2, the time stamp of isochronous cycle at 449 * which the packet arrived. For %FW_CDEV_EVENT_PHY_PACKET_SENT2 and non-ping packet, 450 * the time stamp of isochronous cycle at which the packet was sent. For ping packet, 451 * the tick count for round-trip time measured by 1394 OHCI controller. 452 * The time stamp of isochronous cycle at which either the response was sent for 453 * %FW_CDEV_EVENT_PHY_PACKET_SENT2 or the request arrived for 454 * %FW_CDEV_EVENT_PHY_PACKET_RECEIVED2. 455 * @data: Incoming data 456 * 457 * If @type is %FW_CDEV_EVENT_PHY_PACKET_SENT2, @length is 8 and @data consists of the two PHY 458 * packet quadlets to be sent, in host byte order, 459 * 460 * If @type is %FW_CDEV_EVENT_PHY_PACKET_RECEIVED2, @length is 8 and @data consists of the two PHY 461 * packet quadlets, in host byte order. 462 * 463 * For %FW_CDEV_EVENT_PHY_PACKET_RECEIVED2, the @tstamp is the isochronous cycle at which the 464 * packet arrived. It is 16 bit integer value and the higher 3 bits expresses three low order bits 465 * of second field and the rest 13 bits expresses cycle field in the format of CYCLE_TIME register. 466 * 467 * For %FW_CDEV_EVENT_PHY_PACKET_SENT2, the @tstamp has different meanings whether to sent the 468 * packet for ping or not. If it's not for ping, the @tstamp is the isochronous cycle at which the 469 * packet was sent, and use the same format as the case of %FW_CDEV_EVENT_PHY_PACKET_SENT2. If it's 470 * for ping, the @tstamp is for round-trip time measured by 1394 OHCI controller with 42.195 MHz 471 * resolution. 472 */ 473 struct fw_cdev_event_phy_packet2 { 474 __u64 closure; 475 __u32 type; 476 __u32 rcode; 477 __u32 length; 478 __u32 tstamp; 479 __u32 data[]; 480 }; 481 482 /** 483 * union fw_cdev_event - Convenience union of fw_cdev_event_* types 484 * @common: Valid for all types 485 * @bus_reset: Valid if @common.type == %FW_CDEV_EVENT_BUS_RESET 486 * @response: Valid if @common.type == %FW_CDEV_EVENT_RESPONSE 487 * @request: Valid if @common.type == %FW_CDEV_EVENT_REQUEST 488 * @request2: Valid if @common.type == %FW_CDEV_EVENT_REQUEST2 489 * @iso_interrupt: Valid if @common.type == %FW_CDEV_EVENT_ISO_INTERRUPT 490 * @iso_interrupt_mc: Valid if @common.type == 491 * %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL 492 * @iso_resource: Valid if @common.type == 493 * %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED or 494 * %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED 495 * @phy_packet: Valid if @common.type == 496 * %FW_CDEV_EVENT_PHY_PACKET_SENT or 497 * %FW_CDEV_EVENT_PHY_PACKET_RECEIVED 498 * 499 * @request3: Valid if @common.type == %FW_CDEV_EVENT_REQUEST3 500 * @response2: Valid if @common.type == %FW_CDEV_EVENT_RESPONSE2 501 * @phy_packet2: Valid if @common.type == %FW_CDEV_EVENT_PHY_PACKET_SENT2 or 502 * %FW_CDEV_EVENT_PHY_PACKET_RECEIVED2 503 * 504 * Convenience union for userspace use. Events could be read(2) into an 505 * appropriately aligned char buffer and then cast to this union for further 506 * processing. Note that for a request, response or iso_interrupt event, 507 * the data[] or header[] may make the size of the full event larger than 508 * sizeof(union fw_cdev_event). Also note that if you attempt to read(2) 509 * an event into a buffer that is not large enough for it, the data that does 510 * not fit will be discarded so that the next read(2) will return a new event. 511 */ 512 union fw_cdev_event { 513 struct fw_cdev_event_common common; 514 struct fw_cdev_event_bus_reset bus_reset; 515 struct fw_cdev_event_response response; 516 struct fw_cdev_event_request request; 517 struct fw_cdev_event_request2 request2; /* added in 2.6.36 */ 518 struct fw_cdev_event_iso_interrupt iso_interrupt; 519 struct fw_cdev_event_iso_interrupt_mc iso_interrupt_mc; /* added in 2.6.36 */ 520 struct fw_cdev_event_iso_resource iso_resource; /* added in 2.6.30 */ 521 struct fw_cdev_event_phy_packet phy_packet; /* added in 2.6.36 */ 522 struct fw_cdev_event_request3 request3; /* added in 6.5 */ 523 struct fw_cdev_event_response2 response2; /* added in 6.5 */ 524 struct fw_cdev_event_phy_packet2 phy_packet2; /* added in 6.5 */ 525 }; 526 527 /* available since kernel version 2.6.22 */ 528 #define FW_CDEV_IOC_GET_INFO _IOWR('#', 0x00, struct fw_cdev_get_info) 529 #define FW_CDEV_IOC_SEND_REQUEST _IOW('#', 0x01, struct fw_cdev_send_request) 530 #define FW_CDEV_IOC_ALLOCATE _IOWR('#', 0x02, struct fw_cdev_allocate) 531 #define FW_CDEV_IOC_DEALLOCATE _IOW('#', 0x03, struct fw_cdev_deallocate) 532 #define FW_CDEV_IOC_SEND_RESPONSE _IOW('#', 0x04, struct fw_cdev_send_response) 533 #define FW_CDEV_IOC_INITIATE_BUS_RESET _IOW('#', 0x05, struct fw_cdev_initiate_bus_reset) 534 #define FW_CDEV_IOC_ADD_DESCRIPTOR _IOWR('#', 0x06, struct fw_cdev_add_descriptor) 535 #define FW_CDEV_IOC_REMOVE_DESCRIPTOR _IOW('#', 0x07, struct fw_cdev_remove_descriptor) 536 #define FW_CDEV_IOC_CREATE_ISO_CONTEXT _IOWR('#', 0x08, struct fw_cdev_create_iso_context) 537 #define FW_CDEV_IOC_QUEUE_ISO _IOWR('#', 0x09, struct fw_cdev_queue_iso) 538 #define FW_CDEV_IOC_START_ISO _IOW('#', 0x0a, struct fw_cdev_start_iso) 539 #define FW_CDEV_IOC_STOP_ISO _IOW('#', 0x0b, struct fw_cdev_stop_iso) 540 541 /* available since kernel version 2.6.24 */ 542 #define FW_CDEV_IOC_GET_CYCLE_TIMER _IOR('#', 0x0c, struct fw_cdev_get_cycle_timer) 543 544 /* available since kernel version 2.6.30 */ 545 #define FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE _IOWR('#', 0x0d, struct fw_cdev_allocate_iso_resource) 546 #define FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE _IOW('#', 0x0e, struct fw_cdev_deallocate) 547 #define FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE _IOW('#', 0x0f, struct fw_cdev_allocate_iso_resource) 548 #define FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE_ONCE _IOW('#', 0x10, struct fw_cdev_allocate_iso_resource) 549 #define FW_CDEV_IOC_GET_SPEED _IO('#', 0x11) /* returns speed code */ 550 #define FW_CDEV_IOC_SEND_BROADCAST_REQUEST _IOW('#', 0x12, struct fw_cdev_send_request) 551 #define FW_CDEV_IOC_SEND_STREAM_PACKET _IOW('#', 0x13, struct fw_cdev_send_stream_packet) 552 553 /* available since kernel version 2.6.34 */ 554 #define FW_CDEV_IOC_GET_CYCLE_TIMER2 _IOWR('#', 0x14, struct fw_cdev_get_cycle_timer2) 555 556 /* available since kernel version 2.6.36 */ 557 #define FW_CDEV_IOC_SEND_PHY_PACKET _IOWR('#', 0x15, struct fw_cdev_send_phy_packet) 558 #define FW_CDEV_IOC_RECEIVE_PHY_PACKETS _IOW('#', 0x16, struct fw_cdev_receive_phy_packets) 559 #define FW_CDEV_IOC_SET_ISO_CHANNELS _IOW('#', 0x17, struct fw_cdev_set_iso_channels) 560 561 /* available since kernel version 3.4 */ 562 #define FW_CDEV_IOC_FLUSH_ISO _IOW('#', 0x18, struct fw_cdev_flush_iso) 563 564 /* 565 * ABI version history 566 * 1 (2.6.22) - initial version 567 * (2.6.24) - added %FW_CDEV_IOC_GET_CYCLE_TIMER 568 * 2 (2.6.30) - changed &fw_cdev_event_iso_interrupt.header if 569 * &fw_cdev_create_iso_context.header_size is 8 or more 570 * - added %FW_CDEV_IOC_*_ISO_RESOURCE*, 571 * %FW_CDEV_IOC_GET_SPEED, %FW_CDEV_IOC_SEND_BROADCAST_REQUEST, 572 * %FW_CDEV_IOC_SEND_STREAM_PACKET 573 * (2.6.32) - added time stamp to xmit &fw_cdev_event_iso_interrupt 574 * (2.6.33) - IR has always packet-per-buffer semantics now, not one of 575 * dual-buffer or packet-per-buffer depending on hardware 576 * - shared use and auto-response for FCP registers 577 * 3 (2.6.34) - made &fw_cdev_get_cycle_timer reliable 578 * - added %FW_CDEV_IOC_GET_CYCLE_TIMER2 579 * 4 (2.6.36) - added %FW_CDEV_EVENT_REQUEST2, %FW_CDEV_EVENT_PHY_PACKET_*, 580 * and &fw_cdev_allocate.region_end 581 * - implemented &fw_cdev_event_bus_reset.bm_node_id 582 * - added %FW_CDEV_IOC_SEND_PHY_PACKET, _RECEIVE_PHY_PACKETS 583 * - added %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL, 584 * %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL, and 585 * %FW_CDEV_IOC_SET_ISO_CHANNELS 586 * 5 (3.4) - send %FW_CDEV_EVENT_ISO_INTERRUPT events when needed to 587 * avoid dropping data 588 * - added %FW_CDEV_IOC_FLUSH_ISO 589 * 6 (6.5) - added some event for subactions of asynchronous transaction with time stamp 590 * - %FW_CDEV_EVENT_REQUEST3 591 * - %FW_CDEV_EVENT_RESPONSE2 592 * - %FW_CDEV_EVENT_PHY_PACKET_SENT2 593 * - %FW_CDEV_EVENT_PHY_PACKET_RECEIVED2 594 */ 595 596 /** 597 * struct fw_cdev_get_info - General purpose information ioctl 598 * @version: The version field is just a running serial number. Both an 599 * input parameter (ABI version implemented by the client) and 600 * output parameter (ABI version implemented by the kernel). 601 * A client shall fill in the ABI @version for which the client 602 * was implemented. This is necessary for forward compatibility. 603 * @rom_length: If @rom is non-zero, up to @rom_length bytes of Configuration 604 * ROM will be copied into that user space address. In either 605 * case, @rom_length is updated with the actual length of the 606 * Configuration ROM. 607 * @rom: If non-zero, address of a buffer to be filled by a copy of the 608 * device's Configuration ROM 609 * @bus_reset: If non-zero, address of a buffer to be filled by a 610 * &struct fw_cdev_event_bus_reset with the current state 611 * of the bus. This does not cause a bus reset to happen. 612 * @bus_reset_closure: Value of &closure in this and subsequent bus reset events 613 * @card: The index of the card this device belongs to 614 * 615 * The %FW_CDEV_IOC_GET_INFO ioctl is usually the very first one which a client 616 * performs right after it opened a /dev/fw* file. 617 * 618 * As a side effect, reception of %FW_CDEV_EVENT_BUS_RESET events to be read(2) 619 * is started by this ioctl. 620 */ 621 struct fw_cdev_get_info { 622 __u32 version; 623 __u32 rom_length; 624 __u64 rom; 625 __u64 bus_reset; 626 __u64 bus_reset_closure; 627 __u32 card; 628 }; 629 630 /** 631 * struct fw_cdev_send_request - Send an asynchronous request packet 632 * @tcode: Transaction code of the request 633 * @length: Length of outgoing payload, in bytes 634 * @offset: 48-bit offset at destination node 635 * @closure: Passed back to userspace in the response event 636 * @data: Userspace pointer to payload 637 * @generation: The bus generation where packet is valid 638 * 639 * Send a request to the device. This ioctl implements all outgoing requests. Both quadlet and 640 * block request specify the payload as a pointer to the data in the @data field. Once the 641 * transaction completes, the kernel writes either &fw_cdev_event_response event or 642 * &fw_cdev_event_response event back. The @closure field is passed back to user space in the 643 * response event. 644 */ 645 struct fw_cdev_send_request { 646 __u32 tcode; 647 __u32 length; 648 __u64 offset; 649 __u64 closure; 650 __u64 data; 651 __u32 generation; 652 }; 653 654 /** 655 * struct fw_cdev_send_response - Send an asynchronous response packet 656 * @rcode: Response code as determined by the userspace handler 657 * @length: Length of outgoing payload, in bytes 658 * @data: Userspace pointer to payload 659 * @handle: The handle from the &fw_cdev_event_request 660 * 661 * Send a response to an incoming request. By setting up an address range using 662 * the %FW_CDEV_IOC_ALLOCATE ioctl, userspace can listen for incoming requests. An 663 * incoming request will generate an %FW_CDEV_EVENT_REQUEST, and userspace must 664 * send a reply using this ioctl. The event has a handle to the kernel-side 665 * pending transaction, which should be used with this ioctl. 666 */ 667 struct fw_cdev_send_response { 668 __u32 rcode; 669 __u32 length; 670 __u64 data; 671 __u32 handle; 672 }; 673 674 /** 675 * struct fw_cdev_allocate - Allocate a CSR in an address range 676 * @offset: Start offset of the address range 677 * @closure: To be passed back to userspace in request events 678 * @length: Length of the CSR, in bytes 679 * @handle: Handle to the allocation, written by the kernel 680 * @region_end: First address above the address range (added in ABI v4, 2.6.36) 681 * 682 * Allocate an address range in the 48-bit address space on the local node 683 * (the controller). This allows userspace to listen for requests with an 684 * offset within that address range. Every time when the kernel receives a 685 * request within the range, an &fw_cdev_event_request2 event will be emitted. 686 * (If the kernel or the client implements ABI version <= 3, an 687 * &fw_cdev_event_request will be generated instead.) 688 * 689 * The @closure field is passed back to userspace in these request events. 690 * The @handle field is an out parameter, returning a handle to the allocated 691 * range to be used for later deallocation of the range. 692 * 693 * The address range is allocated on all local nodes. The address allocation 694 * is exclusive except for the FCP command and response registers. If an 695 * exclusive address region is already in use, the ioctl fails with errno set 696 * to %EBUSY. 697 * 698 * If kernel and client implement ABI version >= 4, the kernel looks up a free 699 * spot of size @length inside [@offset..@region_end) and, if found, writes 700 * the start address of the new CSR back in @offset. I.e. @offset is an 701 * in and out parameter. If this automatic placement of a CSR in a bigger 702 * address range is not desired, the client simply needs to set @region_end 703 * = @offset + @length. 704 * 705 * If the kernel or the client implements ABI version <= 3, @region_end is 706 * ignored and effectively assumed to be @offset + @length. 707 * 708 * @region_end is only present in a kernel header >= 2.6.36. If necessary, 709 * this can for example be tested by #ifdef FW_CDEV_EVENT_REQUEST2. 710 */ 711 struct fw_cdev_allocate { 712 __u64 offset; 713 __u64 closure; 714 __u32 length; 715 __u32 handle; 716 __u64 region_end; /* available since kernel version 2.6.36 */ 717 }; 718 719 /** 720 * struct fw_cdev_deallocate - Free a CSR address range or isochronous resource 721 * @handle: Handle to the address range or iso resource, as returned by the 722 * kernel when the range or resource was allocated 723 */ 724 struct fw_cdev_deallocate { 725 __u32 handle; 726 }; 727 728 #define FW_CDEV_LONG_RESET 0 729 #define FW_CDEV_SHORT_RESET 1 730 731 /** 732 * struct fw_cdev_initiate_bus_reset - Initiate a bus reset 733 * @type: %FW_CDEV_SHORT_RESET or %FW_CDEV_LONG_RESET 734 * 735 * Initiate a bus reset for the bus this device is on. The bus reset can be 736 * either the original (long) bus reset or the arbitrated (short) bus reset 737 * introduced in 1394a-2000. 738 * 739 * The ioctl returns immediately. A subsequent &fw_cdev_event_bus_reset 740 * indicates when the reset actually happened. Since ABI v4, this may be 741 * considerably later than the ioctl because the kernel ensures a grace period 742 * between subsequent bus resets as per IEEE 1394 bus management specification. 743 */ 744 struct fw_cdev_initiate_bus_reset { 745 __u32 type; 746 }; 747 748 /** 749 * struct fw_cdev_add_descriptor - Add contents to the local node's config ROM 750 * @immediate: If non-zero, immediate key to insert before pointer 751 * @key: Upper 8 bits of root directory pointer 752 * @data: Userspace pointer to contents of descriptor block 753 * @length: Length of descriptor block data, in quadlets 754 * @handle: Handle to the descriptor, written by the kernel 755 * 756 * Add a descriptor block and optionally a preceding immediate key to the local 757 * node's Configuration ROM. 758 * 759 * The @key field specifies the upper 8 bits of the descriptor root directory 760 * pointer and the @data and @length fields specify the contents. The @key 761 * should be of the form 0xXX000000. The offset part of the root directory entry 762 * will be filled in by the kernel. 763 * 764 * If not 0, the @immediate field specifies an immediate key which will be 765 * inserted before the root directory pointer. 766 * 767 * @immediate, @key, and @data array elements are CPU-endian quadlets. 768 * 769 * If successful, the kernel adds the descriptor and writes back a @handle to 770 * the kernel-side object to be used for later removal of the descriptor block 771 * and immediate key. The kernel will also generate a bus reset to signal the 772 * change of the Configuration ROM to other nodes. 773 * 774 * This ioctl affects the Configuration ROMs of all local nodes. 775 * The ioctl only succeeds on device files which represent a local node. 776 */ 777 struct fw_cdev_add_descriptor { 778 __u32 immediate; 779 __u32 key; 780 __u64 data; 781 __u32 length; 782 __u32 handle; 783 }; 784 785 /** 786 * struct fw_cdev_remove_descriptor - Remove contents from the Configuration ROM 787 * @handle: Handle to the descriptor, as returned by the kernel when the 788 * descriptor was added 789 * 790 * Remove a descriptor block and accompanying immediate key from the local 791 * nodes' Configuration ROMs. The kernel will also generate a bus reset to 792 * signal the change of the Configuration ROM to other nodes. 793 */ 794 struct fw_cdev_remove_descriptor { 795 __u32 handle; 796 }; 797 798 #define FW_CDEV_ISO_CONTEXT_TRANSMIT 0 799 #define FW_CDEV_ISO_CONTEXT_RECEIVE 1 800 #define FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL 2 /* added in 2.6.36 */ 801 802 /** 803 * struct fw_cdev_create_iso_context - Create a context for isochronous I/O 804 * @type: %FW_CDEV_ISO_CONTEXT_TRANSMIT or %FW_CDEV_ISO_CONTEXT_RECEIVE or 805 * %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL 806 * @header_size: Header size to strip in single-channel reception 807 * @channel: Channel to bind to in single-channel reception or transmission 808 * @speed: Transmission speed 809 * @closure: To be returned in &fw_cdev_event_iso_interrupt or 810 * &fw_cdev_event_iso_interrupt_multichannel 811 * @handle: Handle to context, written back by kernel 812 * 813 * Prior to sending or receiving isochronous I/O, a context must be created. 814 * The context records information about the transmit or receive configuration 815 * and typically maps to an underlying hardware resource. A context is set up 816 * for either sending or receiving. It is bound to a specific isochronous 817 * @channel. 818 * 819 * In case of multichannel reception, @header_size and @channel are ignored 820 * and the channels are selected by %FW_CDEV_IOC_SET_ISO_CHANNELS. 821 * 822 * For %FW_CDEV_ISO_CONTEXT_RECEIVE contexts, @header_size must be at least 4 823 * and must be a multiple of 4. It is ignored in other context types. 824 * 825 * @speed is ignored in receive context types. 826 * 827 * If a context was successfully created, the kernel writes back a handle to the 828 * context, which must be passed in for subsequent operations on that context. 829 * 830 * Limitations: 831 * No more than one iso context can be created per fd. 832 * The total number of contexts that all userspace and kernelspace drivers can 833 * create on a card at a time is a hardware limit, typically 4 or 8 contexts per 834 * direction, and of them at most one multichannel receive context. 835 */ 836 struct fw_cdev_create_iso_context { 837 __u32 type; 838 __u32 header_size; 839 __u32 channel; 840 __u32 speed; 841 __u64 closure; 842 __u32 handle; 843 }; 844 845 /** 846 * struct fw_cdev_set_iso_channels - Select channels in multichannel reception 847 * @channels: Bitmask of channels to listen to 848 * @handle: Handle of the mutichannel receive context 849 * 850 * @channels is the bitwise or of 1ULL << n for each channel n to listen to. 851 * 852 * The ioctl fails with errno %EBUSY if there is already another receive context 853 * on a channel in @channels. In that case, the bitmask of all unoccupied 854 * channels is returned in @channels. 855 */ 856 struct fw_cdev_set_iso_channels { 857 __u64 channels; 858 __u32 handle; 859 }; 860 861 #define FW_CDEV_ISO_PAYLOAD_LENGTH(v) (v) 862 #define FW_CDEV_ISO_INTERRUPT (1 << 16) 863 #define FW_CDEV_ISO_SKIP (1 << 17) 864 #define FW_CDEV_ISO_SYNC (1 << 17) 865 #define FW_CDEV_ISO_TAG(v) ((v) << 18) 866 #define FW_CDEV_ISO_SY(v) ((v) << 20) 867 #define FW_CDEV_ISO_HEADER_LENGTH(v) ((v) << 24) 868 869 /** 870 * struct fw_cdev_iso_packet - Isochronous packet 871 * @control: Contains the header length (8 uppermost bits), 872 * the sy field (4 bits), the tag field (2 bits), a sync flag 873 * or a skip flag (1 bit), an interrupt flag (1 bit), and the 874 * payload length (16 lowermost bits) 875 * @header: Header and payload in case of a transmit context. 876 * 877 * &struct fw_cdev_iso_packet is used to describe isochronous packet queues. 878 * Use the FW_CDEV_ISO_* macros to fill in @control. 879 * The @header array is empty in case of receive contexts. 880 * 881 * Context type %FW_CDEV_ISO_CONTEXT_TRANSMIT: 882 * 883 * @control.HEADER_LENGTH must be a multiple of 4. It specifies the numbers of 884 * bytes in @header that will be prepended to the packet's payload. These bytes 885 * are copied into the kernel and will not be accessed after the ioctl has 886 * returned. 887 * 888 * The @control.SY and TAG fields are copied to the iso packet header. These 889 * fields are specified by IEEE 1394a and IEC 61883-1. 890 * 891 * The @control.SKIP flag specifies that no packet is to be sent in a frame. 892 * When using this, all other fields except @control.INTERRUPT must be zero. 893 * 894 * When a packet with the @control.INTERRUPT flag set has been completed, an 895 * &fw_cdev_event_iso_interrupt event will be sent. 896 * 897 * Context type %FW_CDEV_ISO_CONTEXT_RECEIVE: 898 * 899 * @control.HEADER_LENGTH must be a multiple of the context's header_size. 900 * If the HEADER_LENGTH is larger than the context's header_size, multiple 901 * packets are queued for this entry. 902 * 903 * The @control.SY and TAG fields are ignored. 904 * 905 * If the @control.SYNC flag is set, the context drops all packets until a 906 * packet with a sy field is received which matches &fw_cdev_start_iso.sync. 907 * 908 * @control.PAYLOAD_LENGTH defines how many payload bytes can be received for 909 * one packet (in addition to payload quadlets that have been defined as headers 910 * and are stripped and returned in the &fw_cdev_event_iso_interrupt structure). 911 * If more bytes are received, the additional bytes are dropped. If less bytes 912 * are received, the remaining bytes in this part of the payload buffer will not 913 * be written to, not even by the next packet. I.e., packets received in 914 * consecutive frames will not necessarily be consecutive in memory. If an 915 * entry has queued multiple packets, the PAYLOAD_LENGTH is divided equally 916 * among them. 917 * 918 * When a packet with the @control.INTERRUPT flag set has been completed, an 919 * &fw_cdev_event_iso_interrupt event will be sent. An entry that has queued 920 * multiple receive packets is completed when its last packet is completed. 921 * 922 * Context type %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL: 923 * 924 * Here, &fw_cdev_iso_packet would be more aptly named _iso_buffer_chunk since 925 * it specifies a chunk of the mmap()'ed buffer, while the number and alignment 926 * of packets to be placed into the buffer chunk is not known beforehand. 927 * 928 * @control.PAYLOAD_LENGTH is the size of the buffer chunk and specifies room 929 * for header, payload, padding, and trailer bytes of one or more packets. 930 * It must be a multiple of 4. 931 * 932 * @control.HEADER_LENGTH, TAG and SY are ignored. SYNC is treated as described 933 * for single-channel reception. 934 * 935 * When a buffer chunk with the @control.INTERRUPT flag set has been filled 936 * entirely, an &fw_cdev_event_iso_interrupt_mc event will be sent. 937 */ 938 struct fw_cdev_iso_packet { 939 __u32 control; 940 __u32 header[]; 941 }; 942 943 /** 944 * struct fw_cdev_queue_iso - Queue isochronous packets for I/O 945 * @packets: Userspace pointer to an array of &fw_cdev_iso_packet 946 * @data: Pointer into mmap()'ed payload buffer 947 * @size: Size of the @packets array, in bytes 948 * @handle: Isochronous context handle 949 * 950 * Queue a number of isochronous packets for reception or transmission. 951 * This ioctl takes a pointer to an array of &fw_cdev_iso_packet structs, 952 * which describe how to transmit from or receive into a contiguous region 953 * of a mmap()'ed payload buffer. As part of transmit packet descriptors, 954 * a series of headers can be supplied, which will be prepended to the 955 * payload during DMA. 956 * 957 * The kernel may or may not queue all packets, but will write back updated 958 * values of the @packets, @data and @size fields, so the ioctl can be 959 * resubmitted easily. 960 * 961 * In case of a multichannel receive context, @data must be quadlet-aligned 962 * relative to the buffer start. 963 */ 964 struct fw_cdev_queue_iso { 965 __u64 packets; 966 __u64 data; 967 __u32 size; 968 __u32 handle; 969 }; 970 971 #define FW_CDEV_ISO_CONTEXT_MATCH_TAG0 1 972 #define FW_CDEV_ISO_CONTEXT_MATCH_TAG1 2 973 #define FW_CDEV_ISO_CONTEXT_MATCH_TAG2 4 974 #define FW_CDEV_ISO_CONTEXT_MATCH_TAG3 8 975 #define FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS 15 976 977 /** 978 * struct fw_cdev_start_iso - Start an isochronous transmission or reception 979 * @cycle: Cycle in which to start I/O. If @cycle is greater than or 980 * equal to 0, the I/O will start on that cycle. 981 * @sync: Determines the value to wait for receive packets that have 982 * the %FW_CDEV_ISO_SYNC bit set 983 * @tags: Tag filter bit mask. Only valid for isochronous reception. 984 * Determines the tag values for which packets will be accepted. 985 * Use FW_CDEV_ISO_CONTEXT_MATCH_* macros to set @tags. 986 * @handle: Isochronous context handle within which to transmit or receive 987 */ 988 struct fw_cdev_start_iso { 989 __s32 cycle; 990 __u32 sync; 991 __u32 tags; 992 __u32 handle; 993 }; 994 995 /** 996 * struct fw_cdev_stop_iso - Stop an isochronous transmission or reception 997 * @handle: Handle of isochronous context to stop 998 */ 999 struct fw_cdev_stop_iso { 1000 __u32 handle; 1001 }; 1002 1003 /** 1004 * struct fw_cdev_flush_iso - flush completed iso packets 1005 * @handle: handle of isochronous context to flush 1006 * 1007 * For %FW_CDEV_ISO_CONTEXT_TRANSMIT or %FW_CDEV_ISO_CONTEXT_RECEIVE contexts, 1008 * report any completed packets. 1009 * 1010 * For %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL contexts, report the current 1011 * offset in the receive buffer, if it has changed; this is typically in the 1012 * middle of some buffer chunk. 1013 * 1014 * Any %FW_CDEV_EVENT_ISO_INTERRUPT or %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL 1015 * events generated by this ioctl are sent synchronously, i.e., are available 1016 * for reading from the file descriptor when this ioctl returns. 1017 */ 1018 struct fw_cdev_flush_iso { 1019 __u32 handle; 1020 }; 1021 1022 /** 1023 * struct fw_cdev_get_cycle_timer - read cycle timer register 1024 * @local_time: system time, in microseconds since the Epoch 1025 * @cycle_timer: Cycle Time register contents 1026 * 1027 * Same as %FW_CDEV_IOC_GET_CYCLE_TIMER2, but fixed to use %CLOCK_REALTIME 1028 * and only with microseconds resolution. 1029 * 1030 * In version 1 and 2 of the ABI, this ioctl returned unreliable (non- 1031 * monotonic) @cycle_timer values on certain controllers. 1032 */ 1033 struct fw_cdev_get_cycle_timer { 1034 __u64 local_time; 1035 __u32 cycle_timer; 1036 }; 1037 1038 /** 1039 * struct fw_cdev_get_cycle_timer2 - read cycle timer register 1040 * @tv_sec: system time, seconds 1041 * @tv_nsec: system time, sub-seconds part in nanoseconds 1042 * @clk_id: input parameter, clock from which to get the system time 1043 * @cycle_timer: Cycle Time register contents 1044 * 1045 * The %FW_CDEV_IOC_GET_CYCLE_TIMER2 ioctl reads the isochronous cycle timer 1046 * and also the system clock. This allows to correlate reception time of 1047 * isochronous packets with system time. 1048 * 1049 * @clk_id lets you choose a clock like with POSIX' clock_gettime function. 1050 * Supported @clk_id values are POSIX' %CLOCK_REALTIME and %CLOCK_MONOTONIC 1051 * and Linux' %CLOCK_MONOTONIC_RAW. 1052 * 1053 * @cycle_timer consists of 7 bits cycleSeconds, 13 bits cycleCount, and 1054 * 12 bits cycleOffset, in host byte order. Cf. the Cycle Time register 1055 * per IEEE 1394 or Isochronous Cycle Timer register per OHCI-1394. 1056 */ 1057 struct fw_cdev_get_cycle_timer2 { 1058 __s64 tv_sec; 1059 __s32 tv_nsec; 1060 __s32 clk_id; 1061 __u32 cycle_timer; 1062 }; 1063 1064 /** 1065 * struct fw_cdev_allocate_iso_resource - (De)allocate a channel or bandwidth 1066 * @closure: Passed back to userspace in corresponding iso resource events 1067 * @channels: Isochronous channels of which one is to be (de)allocated 1068 * @bandwidth: Isochronous bandwidth units to be (de)allocated 1069 * @handle: Handle to the allocation, written by the kernel (only valid in 1070 * case of %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE ioctls) 1071 * 1072 * The %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE ioctl initiates allocation of an 1073 * isochronous channel and/or of isochronous bandwidth at the isochronous 1074 * resource manager (IRM). Only one of the channels specified in @channels is 1075 * allocated. An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED is sent after 1076 * communication with the IRM, indicating success or failure in the event data. 1077 * The kernel will automatically reallocate the resources after bus resets. 1078 * Should a reallocation fail, an %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event 1079 * will be sent. The kernel will also automatically deallocate the resources 1080 * when the file descriptor is closed. 1081 * 1082 * The %FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE ioctl can be used to initiate 1083 * deallocation of resources which were allocated as described above. 1084 * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event concludes this operation. 1085 * 1086 * The %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE ioctl is a variant of allocation 1087 * without automatic re- or deallocation. 1088 * An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED event concludes this operation, 1089 * indicating success or failure in its data. 1090 * 1091 * The %FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE_ONCE ioctl works like 1092 * %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE except that resources are freed 1093 * instead of allocated. 1094 * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event concludes this operation. 1095 * 1096 * To summarize, %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE allocates iso resources 1097 * for the lifetime of the fd or @handle. 1098 * In contrast, %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE allocates iso resources 1099 * for the duration of a bus generation. 1100 * 1101 * @channels is a host-endian bitfield with the least significant bit 1102 * representing channel 0 and the most significant bit representing channel 63: 1103 * 1ULL << c for each channel c that is a candidate for (de)allocation. 1104 * 1105 * @bandwidth is expressed in bandwidth allocation units, i.e. the time to send 1106 * one quadlet of data (payload or header data) at speed S1600. 1107 */ 1108 struct fw_cdev_allocate_iso_resource { 1109 __u64 closure; 1110 __u64 channels; 1111 __u32 bandwidth; 1112 __u32 handle; 1113 }; 1114 1115 /** 1116 * struct fw_cdev_send_stream_packet - send an asynchronous stream packet 1117 * @length: Length of outgoing payload, in bytes 1118 * @tag: Data format tag 1119 * @channel: Isochronous channel to transmit to 1120 * @sy: Synchronization code 1121 * @closure: Passed back to userspace in the response event 1122 * @data: Userspace pointer to payload 1123 * @generation: The bus generation where packet is valid 1124 * @speed: Speed to transmit at 1125 * 1126 * The %FW_CDEV_IOC_SEND_STREAM_PACKET ioctl sends an asynchronous stream packet to every device 1127 * which is listening to the specified channel. The kernel writes either &fw_cdev_event_response 1128 * event or &fw_cdev_event_response2 event which indicates success or failure of the transmission. 1129 */ 1130 struct fw_cdev_send_stream_packet { 1131 __u32 length; 1132 __u32 tag; 1133 __u32 channel; 1134 __u32 sy; 1135 __u64 closure; 1136 __u64 data; 1137 __u32 generation; 1138 __u32 speed; 1139 }; 1140 1141 /** 1142 * struct fw_cdev_send_phy_packet - send a PHY packet 1143 * @closure: Passed back to userspace in the PHY-packet-sent event 1144 * @data: First and second quadlet of the PHY packet 1145 * @generation: The bus generation where packet is valid 1146 * 1147 * The %FW_CDEV_IOC_SEND_PHY_PACKET ioctl sends a PHY packet to all nodes on the same card as this 1148 * device. After transmission, either %FW_CDEV_EVENT_PHY_PACKET_SENT event or 1149 * %FW_CDEV_EVENT_PHY_PACKET_SENT event is generated. 1150 * 1151 * The payload @data\[\] shall be specified in host byte order. Usually, 1152 * @data\[1\] needs to be the bitwise inverse of @data\[0\]. VersaPHY packets 1153 * are an exception to this rule. 1154 * 1155 * The ioctl is only permitted on device files which represent a local node. 1156 */ 1157 struct fw_cdev_send_phy_packet { 1158 __u64 closure; 1159 __u32 data[2]; 1160 __u32 generation; 1161 }; 1162 1163 /** 1164 * struct fw_cdev_receive_phy_packets - start reception of PHY packets 1165 * @closure: Passed back to userspace in phy packet events 1166 * 1167 * This ioctl activates issuing of either %FW_CDEV_EVENT_PHY_PACKET_RECEIVED or 1168 * %FW_CDEV_EVENT_PHY_PACKET_RECEIVED2 due to incoming PHY packets from any node on the same bus 1169 * as the device. 1170 * 1171 * The ioctl is only permitted on device files which represent a local node. 1172 */ 1173 struct fw_cdev_receive_phy_packets { 1174 __u64 closure; 1175 }; 1176 1177 #define FW_CDEV_VERSION 3 /* Meaningless legacy macro; don't use it. */ 1178 1179 #endif /* _LINUX_FIREWIRE_CDEV_H */ 1180