1*607ca46eSDavid Howells /* 2*607ca46eSDavid Howells * Char device interface. 3*607ca46eSDavid Howells * 4*607ca46eSDavid Howells * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> 5*607ca46eSDavid Howells * 6*607ca46eSDavid Howells * Permission is hereby granted, free of charge, to any person obtaining a 7*607ca46eSDavid Howells * copy of this software and associated documentation files (the "Software"), 8*607ca46eSDavid Howells * to deal in the Software without restriction, including without limitation 9*607ca46eSDavid Howells * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10*607ca46eSDavid Howells * and/or sell copies of the Software, and to permit persons to whom the 11*607ca46eSDavid Howells * Software is furnished to do so, subject to the following conditions: 12*607ca46eSDavid Howells * 13*607ca46eSDavid Howells * The above copyright notice and this permission notice (including the next 14*607ca46eSDavid Howells * paragraph) shall be included in all copies or substantial portions of the 15*607ca46eSDavid Howells * Software. 16*607ca46eSDavid Howells * 17*607ca46eSDavid Howells * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18*607ca46eSDavid Howells * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19*607ca46eSDavid Howells * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20*607ca46eSDavid Howells * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 21*607ca46eSDavid Howells * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22*607ca46eSDavid Howells * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 23*607ca46eSDavid Howells * DEALINGS IN THE SOFTWARE. 24*607ca46eSDavid Howells */ 25*607ca46eSDavid Howells 26*607ca46eSDavid Howells #ifndef _LINUX_FIREWIRE_CDEV_H 27*607ca46eSDavid Howells #define _LINUX_FIREWIRE_CDEV_H 28*607ca46eSDavid Howells 29*607ca46eSDavid Howells #include <linux/ioctl.h> 30*607ca46eSDavid Howells #include <linux/types.h> 31*607ca46eSDavid Howells #include <linux/firewire-constants.h> 32*607ca46eSDavid Howells 33*607ca46eSDavid Howells /* available since kernel version 2.6.22 */ 34*607ca46eSDavid Howells #define FW_CDEV_EVENT_BUS_RESET 0x00 35*607ca46eSDavid Howells #define FW_CDEV_EVENT_RESPONSE 0x01 36*607ca46eSDavid Howells #define FW_CDEV_EVENT_REQUEST 0x02 37*607ca46eSDavid Howells #define FW_CDEV_EVENT_ISO_INTERRUPT 0x03 38*607ca46eSDavid Howells 39*607ca46eSDavid Howells /* available since kernel version 2.6.30 */ 40*607ca46eSDavid Howells #define FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED 0x04 41*607ca46eSDavid Howells #define FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED 0x05 42*607ca46eSDavid Howells 43*607ca46eSDavid Howells /* available since kernel version 2.6.36 */ 44*607ca46eSDavid Howells #define FW_CDEV_EVENT_REQUEST2 0x06 45*607ca46eSDavid Howells #define FW_CDEV_EVENT_PHY_PACKET_SENT 0x07 46*607ca46eSDavid Howells #define FW_CDEV_EVENT_PHY_PACKET_RECEIVED 0x08 47*607ca46eSDavid Howells #define FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL 0x09 48*607ca46eSDavid Howells 49*607ca46eSDavid Howells /** 50*607ca46eSDavid Howells * struct fw_cdev_event_common - Common part of all fw_cdev_event_ types 51*607ca46eSDavid Howells * @closure: For arbitrary use by userspace 52*607ca46eSDavid Howells * @type: Discriminates the fw_cdev_event_ types 53*607ca46eSDavid Howells * 54*607ca46eSDavid Howells * This struct may be used to access generic members of all fw_cdev_event_ 55*607ca46eSDavid Howells * types regardless of the specific type. 56*607ca46eSDavid Howells * 57*607ca46eSDavid Howells * Data passed in the @closure field for a request will be returned in the 58*607ca46eSDavid Howells * corresponding event. It is big enough to hold a pointer on all platforms. 59*607ca46eSDavid Howells * The ioctl used to set @closure depends on the @type of event. 60*607ca46eSDavid Howells */ 61*607ca46eSDavid Howells struct fw_cdev_event_common { 62*607ca46eSDavid Howells __u64 closure; 63*607ca46eSDavid Howells __u32 type; 64*607ca46eSDavid Howells }; 65*607ca46eSDavid Howells 66*607ca46eSDavid Howells /** 67*607ca46eSDavid Howells * struct fw_cdev_event_bus_reset - Sent when a bus reset occurred 68*607ca46eSDavid Howells * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_GET_INFO ioctl 69*607ca46eSDavid Howells * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_BUS_RESET 70*607ca46eSDavid Howells * @node_id: New node ID of this node 71*607ca46eSDavid Howells * @local_node_id: Node ID of the local node, i.e. of the controller 72*607ca46eSDavid Howells * @bm_node_id: Node ID of the bus manager 73*607ca46eSDavid Howells * @irm_node_id: Node ID of the iso resource manager 74*607ca46eSDavid Howells * @root_node_id: Node ID of the root node 75*607ca46eSDavid Howells * @generation: New bus generation 76*607ca46eSDavid Howells * 77*607ca46eSDavid Howells * This event is sent when the bus the device belongs to goes through a bus 78*607ca46eSDavid Howells * reset. It provides information about the new bus configuration, such as 79*607ca46eSDavid Howells * new node ID for this device, new root ID, and others. 80*607ca46eSDavid Howells * 81*607ca46eSDavid Howells * If @bm_node_id is 0xffff right after bus reset it can be reread by an 82*607ca46eSDavid Howells * %FW_CDEV_IOC_GET_INFO ioctl after bus manager selection was finished. 83*607ca46eSDavid Howells * Kernels with ABI version < 4 do not set @bm_node_id. 84*607ca46eSDavid Howells */ 85*607ca46eSDavid Howells struct fw_cdev_event_bus_reset { 86*607ca46eSDavid Howells __u64 closure; 87*607ca46eSDavid Howells __u32 type; 88*607ca46eSDavid Howells __u32 node_id; 89*607ca46eSDavid Howells __u32 local_node_id; 90*607ca46eSDavid Howells __u32 bm_node_id; 91*607ca46eSDavid Howells __u32 irm_node_id; 92*607ca46eSDavid Howells __u32 root_node_id; 93*607ca46eSDavid Howells __u32 generation; 94*607ca46eSDavid Howells }; 95*607ca46eSDavid Howells 96*607ca46eSDavid Howells /** 97*607ca46eSDavid Howells * struct fw_cdev_event_response - Sent when a response packet was received 98*607ca46eSDavid Howells * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_SEND_REQUEST 99*607ca46eSDavid Howells * or %FW_CDEV_IOC_SEND_BROADCAST_REQUEST 100*607ca46eSDavid Howells * or %FW_CDEV_IOC_SEND_STREAM_PACKET ioctl 101*607ca46eSDavid Howells * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_RESPONSE 102*607ca46eSDavid Howells * @rcode: Response code returned by the remote node 103*607ca46eSDavid Howells * @length: Data length, i.e. the response's payload size in bytes 104*607ca46eSDavid Howells * @data: Payload data, if any 105*607ca46eSDavid Howells * 106*607ca46eSDavid Howells * This event is sent when the stack receives a response to an outgoing request 107*607ca46eSDavid Howells * sent by %FW_CDEV_IOC_SEND_REQUEST ioctl. The payload data for responses 108*607ca46eSDavid Howells * carrying data (read and lock responses) follows immediately and can be 109*607ca46eSDavid Howells * accessed through the @data field. 110*607ca46eSDavid Howells * 111*607ca46eSDavid Howells * The event is also generated after conclusions of transactions that do not 112*607ca46eSDavid Howells * involve response packets. This includes unified write transactions, 113*607ca46eSDavid Howells * broadcast write transactions, and transmission of asynchronous stream 114*607ca46eSDavid Howells * packets. @rcode indicates success or failure of such transmissions. 115*607ca46eSDavid Howells */ 116*607ca46eSDavid Howells struct fw_cdev_event_response { 117*607ca46eSDavid Howells __u64 closure; 118*607ca46eSDavid Howells __u32 type; 119*607ca46eSDavid Howells __u32 rcode; 120*607ca46eSDavid Howells __u32 length; 121*607ca46eSDavid Howells __u32 data[0]; 122*607ca46eSDavid Howells }; 123*607ca46eSDavid Howells 124*607ca46eSDavid Howells /** 125*607ca46eSDavid Howells * struct fw_cdev_event_request - Old version of &fw_cdev_event_request2 126*607ca46eSDavid Howells * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_REQUEST 127*607ca46eSDavid Howells * 128*607ca46eSDavid Howells * This event is sent instead of &fw_cdev_event_request2 if the kernel or 129*607ca46eSDavid Howells * the client implements ABI version <= 3. &fw_cdev_event_request lacks 130*607ca46eSDavid Howells * essential information; use &fw_cdev_event_request2 instead. 131*607ca46eSDavid Howells */ 132*607ca46eSDavid Howells struct fw_cdev_event_request { 133*607ca46eSDavid Howells __u64 closure; 134*607ca46eSDavid Howells __u32 type; 135*607ca46eSDavid Howells __u32 tcode; 136*607ca46eSDavid Howells __u64 offset; 137*607ca46eSDavid Howells __u32 handle; 138*607ca46eSDavid Howells __u32 length; 139*607ca46eSDavid Howells __u32 data[0]; 140*607ca46eSDavid Howells }; 141*607ca46eSDavid Howells 142*607ca46eSDavid Howells /** 143*607ca46eSDavid Howells * struct fw_cdev_event_request2 - Sent on incoming request to an address region 144*607ca46eSDavid Howells * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_ALLOCATE ioctl 145*607ca46eSDavid Howells * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_REQUEST2 146*607ca46eSDavid Howells * @tcode: Transaction code of the incoming request 147*607ca46eSDavid Howells * @offset: The offset into the 48-bit per-node address space 148*607ca46eSDavid Howells * @source_node_id: Sender node ID 149*607ca46eSDavid Howells * @destination_node_id: Destination node ID 150*607ca46eSDavid Howells * @card: The index of the card from which the request came 151*607ca46eSDavid Howells * @generation: Bus generation in which the request is valid 152*607ca46eSDavid Howells * @handle: Reference to the kernel-side pending request 153*607ca46eSDavid Howells * @length: Data length, i.e. the request's payload size in bytes 154*607ca46eSDavid Howells * @data: Incoming data, if any 155*607ca46eSDavid Howells * 156*607ca46eSDavid Howells * This event is sent when the stack receives an incoming request to an address 157*607ca46eSDavid Howells * region registered using the %FW_CDEV_IOC_ALLOCATE ioctl. The request is 158*607ca46eSDavid Howells * guaranteed to be completely contained in the specified region. Userspace is 159*607ca46eSDavid Howells * responsible for sending the response by %FW_CDEV_IOC_SEND_RESPONSE ioctl, 160*607ca46eSDavid Howells * using the same @handle. 161*607ca46eSDavid Howells * 162*607ca46eSDavid Howells * The payload data for requests carrying data (write and lock requests) 163*607ca46eSDavid Howells * follows immediately and can be accessed through the @data field. 164*607ca46eSDavid Howells * 165*607ca46eSDavid Howells * Unlike &fw_cdev_event_request, @tcode of lock requests is one of the 166*607ca46eSDavid Howells * firewire-core specific %TCODE_LOCK_MASK_SWAP...%TCODE_LOCK_VENDOR_DEPENDENT, 167*607ca46eSDavid Howells * i.e. encodes the extended transaction code. 168*607ca46eSDavid Howells * 169*607ca46eSDavid Howells * @card may differ from &fw_cdev_get_info.card because requests are received 170*607ca46eSDavid Howells * from all cards of the Linux host. @source_node_id, @destination_node_id, and 171*607ca46eSDavid Howells * @generation pertain to that card. Destination node ID and bus generation may 172*607ca46eSDavid Howells * therefore differ from the corresponding fields of the last 173*607ca46eSDavid Howells * &fw_cdev_event_bus_reset. 174*607ca46eSDavid Howells * 175*607ca46eSDavid Howells * @destination_node_id may also differ from the current node ID because of a 176*607ca46eSDavid Howells * non-local bus ID part or in case of a broadcast write request. Note, a 177*607ca46eSDavid Howells * client must call an %FW_CDEV_IOC_SEND_RESPONSE ioctl even in case of a 178*607ca46eSDavid Howells * broadcast write request; the kernel will then release the kernel-side pending 179*607ca46eSDavid Howells * request but will not actually send a response packet. 180*607ca46eSDavid Howells * 181*607ca46eSDavid Howells * In case of a write request to FCP_REQUEST or FCP_RESPONSE, the kernel already 182*607ca46eSDavid Howells * sent a write response immediately after the request was received; in this 183*607ca46eSDavid Howells * case the client must still call an %FW_CDEV_IOC_SEND_RESPONSE ioctl to 184*607ca46eSDavid Howells * release the kernel-side pending request, though another response won't be 185*607ca46eSDavid Howells * sent. 186*607ca46eSDavid Howells * 187*607ca46eSDavid Howells * If the client subsequently needs to initiate requests to the sender node of 188*607ca46eSDavid Howells * an &fw_cdev_event_request2, it needs to use a device file with matching 189*607ca46eSDavid Howells * card index, node ID, and generation for outbound requests. 190*607ca46eSDavid Howells */ 191*607ca46eSDavid Howells struct fw_cdev_event_request2 { 192*607ca46eSDavid Howells __u64 closure; 193*607ca46eSDavid Howells __u32 type; 194*607ca46eSDavid Howells __u32 tcode; 195*607ca46eSDavid Howells __u64 offset; 196*607ca46eSDavid Howells __u32 source_node_id; 197*607ca46eSDavid Howells __u32 destination_node_id; 198*607ca46eSDavid Howells __u32 card; 199*607ca46eSDavid Howells __u32 generation; 200*607ca46eSDavid Howells __u32 handle; 201*607ca46eSDavid Howells __u32 length; 202*607ca46eSDavid Howells __u32 data[0]; 203*607ca46eSDavid Howells }; 204*607ca46eSDavid Howells 205*607ca46eSDavid Howells /** 206*607ca46eSDavid Howells * struct fw_cdev_event_iso_interrupt - Sent when an iso packet was completed 207*607ca46eSDavid Howells * @closure: See &fw_cdev_event_common; 208*607ca46eSDavid Howells * set by %FW_CDEV_CREATE_ISO_CONTEXT ioctl 209*607ca46eSDavid Howells * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_ISO_INTERRUPT 210*607ca46eSDavid Howells * @cycle: Cycle counter of the last completed packet 211*607ca46eSDavid Howells * @header_length: Total length of following headers, in bytes 212*607ca46eSDavid Howells * @header: Stripped headers, if any 213*607ca46eSDavid Howells * 214*607ca46eSDavid Howells * This event is sent when the controller has completed an &fw_cdev_iso_packet 215*607ca46eSDavid Howells * with the %FW_CDEV_ISO_INTERRUPT bit set, when explicitly requested with 216*607ca46eSDavid Howells * %FW_CDEV_IOC_FLUSH_ISO, or when there have been so many completed packets 217*607ca46eSDavid Howells * without the interrupt bit set that the kernel's internal buffer for @header 218*607ca46eSDavid Howells * is about to overflow. (In the last case, kernels with ABI version < 5 drop 219*607ca46eSDavid Howells * header data up to the next interrupt packet.) 220*607ca46eSDavid Howells * 221*607ca46eSDavid Howells * Isochronous transmit events (context type %FW_CDEV_ISO_CONTEXT_TRANSMIT): 222*607ca46eSDavid Howells * 223*607ca46eSDavid Howells * In version 3 and some implementations of version 2 of the ABI, &header_length 224*607ca46eSDavid Howells * is a multiple of 4 and &header contains timestamps of all packets up until 225*607ca46eSDavid Howells * the interrupt packet. The format of the timestamps is as described below for 226*607ca46eSDavid Howells * isochronous reception. In version 1 of the ABI, &header_length was 0. 227*607ca46eSDavid Howells * 228*607ca46eSDavid Howells * Isochronous receive events (context type %FW_CDEV_ISO_CONTEXT_RECEIVE): 229*607ca46eSDavid Howells * 230*607ca46eSDavid Howells * The headers stripped of all packets up until and including the interrupt 231*607ca46eSDavid Howells * packet are returned in the @header field. The amount of header data per 232*607ca46eSDavid Howells * packet is as specified at iso context creation by 233*607ca46eSDavid Howells * &fw_cdev_create_iso_context.header_size. 234*607ca46eSDavid Howells * 235*607ca46eSDavid Howells * Hence, _interrupt.header_length / _context.header_size is the number of 236*607ca46eSDavid Howells * packets received in this interrupt event. The client can now iterate 237*607ca46eSDavid Howells * through the mmap()'ed DMA buffer according to this number of packets and 238*607ca46eSDavid Howells * to the buffer sizes as the client specified in &fw_cdev_queue_iso. 239*607ca46eSDavid Howells * 240*607ca46eSDavid Howells * Since version 2 of this ABI, the portion for each packet in _interrupt.header 241*607ca46eSDavid Howells * consists of the 1394 isochronous packet header, followed by a timestamp 242*607ca46eSDavid Howells * quadlet if &fw_cdev_create_iso_context.header_size > 4, followed by quadlets 243*607ca46eSDavid Howells * from the packet payload if &fw_cdev_create_iso_context.header_size > 8. 244*607ca46eSDavid Howells * 245*607ca46eSDavid Howells * Format of 1394 iso packet header: 16 bits data_length, 2 bits tag, 6 bits 246*607ca46eSDavid Howells * channel, 4 bits tcode, 4 bits sy, in big endian byte order. 247*607ca46eSDavid Howells * data_length is the actual received size of the packet without the four 248*607ca46eSDavid Howells * 1394 iso packet header bytes. 249*607ca46eSDavid Howells * 250*607ca46eSDavid Howells * Format of timestamp: 16 bits invalid, 3 bits cycleSeconds, 13 bits 251*607ca46eSDavid Howells * cycleCount, in big endian byte order. 252*607ca46eSDavid Howells * 253*607ca46eSDavid Howells * In version 1 of the ABI, no timestamp quadlet was inserted; instead, payload 254*607ca46eSDavid Howells * data followed directly after the 1394 is header if header_size > 4. 255*607ca46eSDavid Howells * Behaviour of ver. 1 of this ABI is no longer available since ABI ver. 2. 256*607ca46eSDavid Howells */ 257*607ca46eSDavid Howells struct fw_cdev_event_iso_interrupt { 258*607ca46eSDavid Howells __u64 closure; 259*607ca46eSDavid Howells __u32 type; 260*607ca46eSDavid Howells __u32 cycle; 261*607ca46eSDavid Howells __u32 header_length; 262*607ca46eSDavid Howells __u32 header[0]; 263*607ca46eSDavid Howells }; 264*607ca46eSDavid Howells 265*607ca46eSDavid Howells /** 266*607ca46eSDavid Howells * struct fw_cdev_event_iso_interrupt_mc - An iso buffer chunk was completed 267*607ca46eSDavid Howells * @closure: See &fw_cdev_event_common; 268*607ca46eSDavid Howells * set by %FW_CDEV_CREATE_ISO_CONTEXT ioctl 269*607ca46eSDavid Howells * @type: %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL 270*607ca46eSDavid Howells * @completed: Offset into the receive buffer; data before this offset is valid 271*607ca46eSDavid Howells * 272*607ca46eSDavid Howells * This event is sent in multichannel contexts (context type 273*607ca46eSDavid Howells * %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL) for &fw_cdev_iso_packet buffer 274*607ca46eSDavid Howells * chunks that have been completely filled and that have the 275*607ca46eSDavid Howells * %FW_CDEV_ISO_INTERRUPT bit set, or when explicitly requested with 276*607ca46eSDavid Howells * %FW_CDEV_IOC_FLUSH_ISO. 277*607ca46eSDavid Howells * 278*607ca46eSDavid Howells * The buffer is continuously filled with the following data, per packet: 279*607ca46eSDavid Howells * - the 1394 iso packet header as described at &fw_cdev_event_iso_interrupt, 280*607ca46eSDavid Howells * but in little endian byte order, 281*607ca46eSDavid Howells * - packet payload (as many bytes as specified in the data_length field of 282*607ca46eSDavid Howells * the 1394 iso packet header) in big endian byte order, 283*607ca46eSDavid Howells * - 0...3 padding bytes as needed to align the following trailer quadlet, 284*607ca46eSDavid Howells * - trailer quadlet, containing the reception timestamp as described at 285*607ca46eSDavid Howells * &fw_cdev_event_iso_interrupt, but in little endian byte order. 286*607ca46eSDavid Howells * 287*607ca46eSDavid Howells * Hence the per-packet size is data_length (rounded up to a multiple of 4) + 8. 288*607ca46eSDavid Howells * When processing the data, stop before a packet that would cross the 289*607ca46eSDavid Howells * @completed offset. 290*607ca46eSDavid Howells * 291*607ca46eSDavid Howells * A packet near the end of a buffer chunk will typically spill over into the 292*607ca46eSDavid Howells * next queued buffer chunk. It is the responsibility of the client to check 293*607ca46eSDavid Howells * for this condition, assemble a broken-up packet from its parts, and not to 294*607ca46eSDavid Howells * re-queue any buffer chunks in which as yet unread packet parts reside. 295*607ca46eSDavid Howells */ 296*607ca46eSDavid Howells struct fw_cdev_event_iso_interrupt_mc { 297*607ca46eSDavid Howells __u64 closure; 298*607ca46eSDavid Howells __u32 type; 299*607ca46eSDavid Howells __u32 completed; 300*607ca46eSDavid Howells }; 301*607ca46eSDavid Howells 302*607ca46eSDavid Howells /** 303*607ca46eSDavid Howells * struct fw_cdev_event_iso_resource - Iso resources were allocated or freed 304*607ca46eSDavid Howells * @closure: See &fw_cdev_event_common; 305*607ca46eSDavid Howells * set by %FW_CDEV_IOC_(DE)ALLOCATE_ISO_RESOURCE(_ONCE) ioctl 306*607ca46eSDavid Howells * @type: %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED or 307*607ca46eSDavid Howells * %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED 308*607ca46eSDavid Howells * @handle: Reference by which an allocated resource can be deallocated 309*607ca46eSDavid Howells * @channel: Isochronous channel which was (de)allocated, if any 310*607ca46eSDavid Howells * @bandwidth: Bandwidth allocation units which were (de)allocated, if any 311*607ca46eSDavid Howells * 312*607ca46eSDavid Howells * An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED event is sent after an isochronous 313*607ca46eSDavid Howells * resource was allocated at the IRM. The client has to check @channel and 314*607ca46eSDavid Howells * @bandwidth for whether the allocation actually succeeded. 315*607ca46eSDavid Howells * 316*607ca46eSDavid Howells * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event is sent after an isochronous 317*607ca46eSDavid Howells * resource was deallocated at the IRM. It is also sent when automatic 318*607ca46eSDavid Howells * reallocation after a bus reset failed. 319*607ca46eSDavid Howells * 320*607ca46eSDavid Howells * @channel is <0 if no channel was (de)allocated or if reallocation failed. 321*607ca46eSDavid Howells * @bandwidth is 0 if no bandwidth was (de)allocated or if reallocation failed. 322*607ca46eSDavid Howells */ 323*607ca46eSDavid Howells struct fw_cdev_event_iso_resource { 324*607ca46eSDavid Howells __u64 closure; 325*607ca46eSDavid Howells __u32 type; 326*607ca46eSDavid Howells __u32 handle; 327*607ca46eSDavid Howells __s32 channel; 328*607ca46eSDavid Howells __s32 bandwidth; 329*607ca46eSDavid Howells }; 330*607ca46eSDavid Howells 331*607ca46eSDavid Howells /** 332*607ca46eSDavid Howells * struct fw_cdev_event_phy_packet - A PHY packet was transmitted or received 333*607ca46eSDavid Howells * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_SEND_PHY_PACKET 334*607ca46eSDavid Howells * or %FW_CDEV_IOC_RECEIVE_PHY_PACKETS ioctl 335*607ca46eSDavid Howells * @type: %FW_CDEV_EVENT_PHY_PACKET_SENT or %..._RECEIVED 336*607ca46eSDavid Howells * @rcode: %RCODE_..., indicates success or failure of transmission 337*607ca46eSDavid Howells * @length: Data length in bytes 338*607ca46eSDavid Howells * @data: Incoming data 339*607ca46eSDavid Howells * 340*607ca46eSDavid Howells * If @type is %FW_CDEV_EVENT_PHY_PACKET_SENT, @length is 0 and @data empty, 341*607ca46eSDavid Howells * except in case of a ping packet: Then, @length is 4, and @data[0] is the 342*607ca46eSDavid Howells * ping time in 49.152MHz clocks if @rcode is %RCODE_COMPLETE. 343*607ca46eSDavid Howells * 344*607ca46eSDavid Howells * If @type is %FW_CDEV_EVENT_PHY_PACKET_RECEIVED, @length is 8 and @data 345*607ca46eSDavid Howells * consists of the two PHY packet quadlets, in host byte order. 346*607ca46eSDavid Howells */ 347*607ca46eSDavid Howells struct fw_cdev_event_phy_packet { 348*607ca46eSDavid Howells __u64 closure; 349*607ca46eSDavid Howells __u32 type; 350*607ca46eSDavid Howells __u32 rcode; 351*607ca46eSDavid Howells __u32 length; 352*607ca46eSDavid Howells __u32 data[0]; 353*607ca46eSDavid Howells }; 354*607ca46eSDavid Howells 355*607ca46eSDavid Howells /** 356*607ca46eSDavid Howells * union fw_cdev_event - Convenience union of fw_cdev_event_ types 357*607ca46eSDavid Howells * @common: Valid for all types 358*607ca46eSDavid Howells * @bus_reset: Valid if @common.type == %FW_CDEV_EVENT_BUS_RESET 359*607ca46eSDavid Howells * @response: Valid if @common.type == %FW_CDEV_EVENT_RESPONSE 360*607ca46eSDavid Howells * @request: Valid if @common.type == %FW_CDEV_EVENT_REQUEST 361*607ca46eSDavid Howells * @request2: Valid if @common.type == %FW_CDEV_EVENT_REQUEST2 362*607ca46eSDavid Howells * @iso_interrupt: Valid if @common.type == %FW_CDEV_EVENT_ISO_INTERRUPT 363*607ca46eSDavid Howells * @iso_interrupt_mc: Valid if @common.type == 364*607ca46eSDavid Howells * %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL 365*607ca46eSDavid Howells * @iso_resource: Valid if @common.type == 366*607ca46eSDavid Howells * %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED or 367*607ca46eSDavid Howells * %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED 368*607ca46eSDavid Howells * @phy_packet: Valid if @common.type == 369*607ca46eSDavid Howells * %FW_CDEV_EVENT_PHY_PACKET_SENT or 370*607ca46eSDavid Howells * %FW_CDEV_EVENT_PHY_PACKET_RECEIVED 371*607ca46eSDavid Howells * 372*607ca46eSDavid Howells * Convenience union for userspace use. Events could be read(2) into an 373*607ca46eSDavid Howells * appropriately aligned char buffer and then cast to this union for further 374*607ca46eSDavid Howells * processing. Note that for a request, response or iso_interrupt event, 375*607ca46eSDavid Howells * the data[] or header[] may make the size of the full event larger than 376*607ca46eSDavid Howells * sizeof(union fw_cdev_event). Also note that if you attempt to read(2) 377*607ca46eSDavid Howells * an event into a buffer that is not large enough for it, the data that does 378*607ca46eSDavid Howells * not fit will be discarded so that the next read(2) will return a new event. 379*607ca46eSDavid Howells */ 380*607ca46eSDavid Howells union fw_cdev_event { 381*607ca46eSDavid Howells struct fw_cdev_event_common common; 382*607ca46eSDavid Howells struct fw_cdev_event_bus_reset bus_reset; 383*607ca46eSDavid Howells struct fw_cdev_event_response response; 384*607ca46eSDavid Howells struct fw_cdev_event_request request; 385*607ca46eSDavid Howells struct fw_cdev_event_request2 request2; /* added in 2.6.36 */ 386*607ca46eSDavid Howells struct fw_cdev_event_iso_interrupt iso_interrupt; 387*607ca46eSDavid Howells struct fw_cdev_event_iso_interrupt_mc iso_interrupt_mc; /* added in 2.6.36 */ 388*607ca46eSDavid Howells struct fw_cdev_event_iso_resource iso_resource; /* added in 2.6.30 */ 389*607ca46eSDavid Howells struct fw_cdev_event_phy_packet phy_packet; /* added in 2.6.36 */ 390*607ca46eSDavid Howells }; 391*607ca46eSDavid Howells 392*607ca46eSDavid Howells /* available since kernel version 2.6.22 */ 393*607ca46eSDavid Howells #define FW_CDEV_IOC_GET_INFO _IOWR('#', 0x00, struct fw_cdev_get_info) 394*607ca46eSDavid Howells #define FW_CDEV_IOC_SEND_REQUEST _IOW('#', 0x01, struct fw_cdev_send_request) 395*607ca46eSDavid Howells #define FW_CDEV_IOC_ALLOCATE _IOWR('#', 0x02, struct fw_cdev_allocate) 396*607ca46eSDavid Howells #define FW_CDEV_IOC_DEALLOCATE _IOW('#', 0x03, struct fw_cdev_deallocate) 397*607ca46eSDavid Howells #define FW_CDEV_IOC_SEND_RESPONSE _IOW('#', 0x04, struct fw_cdev_send_response) 398*607ca46eSDavid Howells #define FW_CDEV_IOC_INITIATE_BUS_RESET _IOW('#', 0x05, struct fw_cdev_initiate_bus_reset) 399*607ca46eSDavid Howells #define FW_CDEV_IOC_ADD_DESCRIPTOR _IOWR('#', 0x06, struct fw_cdev_add_descriptor) 400*607ca46eSDavid Howells #define FW_CDEV_IOC_REMOVE_DESCRIPTOR _IOW('#', 0x07, struct fw_cdev_remove_descriptor) 401*607ca46eSDavid Howells #define FW_CDEV_IOC_CREATE_ISO_CONTEXT _IOWR('#', 0x08, struct fw_cdev_create_iso_context) 402*607ca46eSDavid Howells #define FW_CDEV_IOC_QUEUE_ISO _IOWR('#', 0x09, struct fw_cdev_queue_iso) 403*607ca46eSDavid Howells #define FW_CDEV_IOC_START_ISO _IOW('#', 0x0a, struct fw_cdev_start_iso) 404*607ca46eSDavid Howells #define FW_CDEV_IOC_STOP_ISO _IOW('#', 0x0b, struct fw_cdev_stop_iso) 405*607ca46eSDavid Howells 406*607ca46eSDavid Howells /* available since kernel version 2.6.24 */ 407*607ca46eSDavid Howells #define FW_CDEV_IOC_GET_CYCLE_TIMER _IOR('#', 0x0c, struct fw_cdev_get_cycle_timer) 408*607ca46eSDavid Howells 409*607ca46eSDavid Howells /* available since kernel version 2.6.30 */ 410*607ca46eSDavid Howells #define FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE _IOWR('#', 0x0d, struct fw_cdev_allocate_iso_resource) 411*607ca46eSDavid Howells #define FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE _IOW('#', 0x0e, struct fw_cdev_deallocate) 412*607ca46eSDavid Howells #define FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE _IOW('#', 0x0f, struct fw_cdev_allocate_iso_resource) 413*607ca46eSDavid Howells #define FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE_ONCE _IOW('#', 0x10, struct fw_cdev_allocate_iso_resource) 414*607ca46eSDavid Howells #define FW_CDEV_IOC_GET_SPEED _IO('#', 0x11) /* returns speed code */ 415*607ca46eSDavid Howells #define FW_CDEV_IOC_SEND_BROADCAST_REQUEST _IOW('#', 0x12, struct fw_cdev_send_request) 416*607ca46eSDavid Howells #define FW_CDEV_IOC_SEND_STREAM_PACKET _IOW('#', 0x13, struct fw_cdev_send_stream_packet) 417*607ca46eSDavid Howells 418*607ca46eSDavid Howells /* available since kernel version 2.6.34 */ 419*607ca46eSDavid Howells #define FW_CDEV_IOC_GET_CYCLE_TIMER2 _IOWR('#', 0x14, struct fw_cdev_get_cycle_timer2) 420*607ca46eSDavid Howells 421*607ca46eSDavid Howells /* available since kernel version 2.6.36 */ 422*607ca46eSDavid Howells #define FW_CDEV_IOC_SEND_PHY_PACKET _IOWR('#', 0x15, struct fw_cdev_send_phy_packet) 423*607ca46eSDavid Howells #define FW_CDEV_IOC_RECEIVE_PHY_PACKETS _IOW('#', 0x16, struct fw_cdev_receive_phy_packets) 424*607ca46eSDavid Howells #define FW_CDEV_IOC_SET_ISO_CHANNELS _IOW('#', 0x17, struct fw_cdev_set_iso_channels) 425*607ca46eSDavid Howells 426*607ca46eSDavid Howells /* available since kernel version 3.4 */ 427*607ca46eSDavid Howells #define FW_CDEV_IOC_FLUSH_ISO _IOW('#', 0x18, struct fw_cdev_flush_iso) 428*607ca46eSDavid Howells 429*607ca46eSDavid Howells /* 430*607ca46eSDavid Howells * ABI version history 431*607ca46eSDavid Howells * 1 (2.6.22) - initial version 432*607ca46eSDavid Howells * (2.6.24) - added %FW_CDEV_IOC_GET_CYCLE_TIMER 433*607ca46eSDavid Howells * 2 (2.6.30) - changed &fw_cdev_event_iso_interrupt.header if 434*607ca46eSDavid Howells * &fw_cdev_create_iso_context.header_size is 8 or more 435*607ca46eSDavid Howells * - added %FW_CDEV_IOC_*_ISO_RESOURCE*, 436*607ca46eSDavid Howells * %FW_CDEV_IOC_GET_SPEED, %FW_CDEV_IOC_SEND_BROADCAST_REQUEST, 437*607ca46eSDavid Howells * %FW_CDEV_IOC_SEND_STREAM_PACKET 438*607ca46eSDavid Howells * (2.6.32) - added time stamp to xmit &fw_cdev_event_iso_interrupt 439*607ca46eSDavid Howells * (2.6.33) - IR has always packet-per-buffer semantics now, not one of 440*607ca46eSDavid Howells * dual-buffer or packet-per-buffer depending on hardware 441*607ca46eSDavid Howells * - shared use and auto-response for FCP registers 442*607ca46eSDavid Howells * 3 (2.6.34) - made &fw_cdev_get_cycle_timer reliable 443*607ca46eSDavid Howells * - added %FW_CDEV_IOC_GET_CYCLE_TIMER2 444*607ca46eSDavid Howells * 4 (2.6.36) - added %FW_CDEV_EVENT_REQUEST2, %FW_CDEV_EVENT_PHY_PACKET_*, 445*607ca46eSDavid Howells * and &fw_cdev_allocate.region_end 446*607ca46eSDavid Howells * - implemented &fw_cdev_event_bus_reset.bm_node_id 447*607ca46eSDavid Howells * - added %FW_CDEV_IOC_SEND_PHY_PACKET, _RECEIVE_PHY_PACKETS 448*607ca46eSDavid Howells * - added %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL, 449*607ca46eSDavid Howells * %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL, and 450*607ca46eSDavid Howells * %FW_CDEV_IOC_SET_ISO_CHANNELS 451*607ca46eSDavid Howells * 5 (3.4) - send %FW_CDEV_EVENT_ISO_INTERRUPT events when needed to 452*607ca46eSDavid Howells * avoid dropping data 453*607ca46eSDavid Howells * - added %FW_CDEV_IOC_FLUSH_ISO 454*607ca46eSDavid Howells */ 455*607ca46eSDavid Howells 456*607ca46eSDavid Howells /** 457*607ca46eSDavid Howells * struct fw_cdev_get_info - General purpose information ioctl 458*607ca46eSDavid Howells * @version: The version field is just a running serial number. Both an 459*607ca46eSDavid Howells * input parameter (ABI version implemented by the client) and 460*607ca46eSDavid Howells * output parameter (ABI version implemented by the kernel). 461*607ca46eSDavid Howells * A client shall fill in the ABI @version for which the client 462*607ca46eSDavid Howells * was implemented. This is necessary for forward compatibility. 463*607ca46eSDavid Howells * @rom_length: If @rom is non-zero, up to @rom_length bytes of Configuration 464*607ca46eSDavid Howells * ROM will be copied into that user space address. In either 465*607ca46eSDavid Howells * case, @rom_length is updated with the actual length of the 466*607ca46eSDavid Howells * Configuration ROM. 467*607ca46eSDavid Howells * @rom: If non-zero, address of a buffer to be filled by a copy of the 468*607ca46eSDavid Howells * device's Configuration ROM 469*607ca46eSDavid Howells * @bus_reset: If non-zero, address of a buffer to be filled by a 470*607ca46eSDavid Howells * &struct fw_cdev_event_bus_reset with the current state 471*607ca46eSDavid Howells * of the bus. This does not cause a bus reset to happen. 472*607ca46eSDavid Howells * @bus_reset_closure: Value of &closure in this and subsequent bus reset events 473*607ca46eSDavid Howells * @card: The index of the card this device belongs to 474*607ca46eSDavid Howells * 475*607ca46eSDavid Howells * The %FW_CDEV_IOC_GET_INFO ioctl is usually the very first one which a client 476*607ca46eSDavid Howells * performs right after it opened a /dev/fw* file. 477*607ca46eSDavid Howells * 478*607ca46eSDavid Howells * As a side effect, reception of %FW_CDEV_EVENT_BUS_RESET events to be read(2) 479*607ca46eSDavid Howells * is started by this ioctl. 480*607ca46eSDavid Howells */ 481*607ca46eSDavid Howells struct fw_cdev_get_info { 482*607ca46eSDavid Howells __u32 version; 483*607ca46eSDavid Howells __u32 rom_length; 484*607ca46eSDavid Howells __u64 rom; 485*607ca46eSDavid Howells __u64 bus_reset; 486*607ca46eSDavid Howells __u64 bus_reset_closure; 487*607ca46eSDavid Howells __u32 card; 488*607ca46eSDavid Howells }; 489*607ca46eSDavid Howells 490*607ca46eSDavid Howells /** 491*607ca46eSDavid Howells * struct fw_cdev_send_request - Send an asynchronous request packet 492*607ca46eSDavid Howells * @tcode: Transaction code of the request 493*607ca46eSDavid Howells * @length: Length of outgoing payload, in bytes 494*607ca46eSDavid Howells * @offset: 48-bit offset at destination node 495*607ca46eSDavid Howells * @closure: Passed back to userspace in the response event 496*607ca46eSDavid Howells * @data: Userspace pointer to payload 497*607ca46eSDavid Howells * @generation: The bus generation where packet is valid 498*607ca46eSDavid Howells * 499*607ca46eSDavid Howells * Send a request to the device. This ioctl implements all outgoing requests. 500*607ca46eSDavid Howells * Both quadlet and block request specify the payload as a pointer to the data 501*607ca46eSDavid Howells * in the @data field. Once the transaction completes, the kernel writes an 502*607ca46eSDavid Howells * &fw_cdev_event_response event back. The @closure field is passed back to 503*607ca46eSDavid Howells * user space in the response event. 504*607ca46eSDavid Howells */ 505*607ca46eSDavid Howells struct fw_cdev_send_request { 506*607ca46eSDavid Howells __u32 tcode; 507*607ca46eSDavid Howells __u32 length; 508*607ca46eSDavid Howells __u64 offset; 509*607ca46eSDavid Howells __u64 closure; 510*607ca46eSDavid Howells __u64 data; 511*607ca46eSDavid Howells __u32 generation; 512*607ca46eSDavid Howells }; 513*607ca46eSDavid Howells 514*607ca46eSDavid Howells /** 515*607ca46eSDavid Howells * struct fw_cdev_send_response - Send an asynchronous response packet 516*607ca46eSDavid Howells * @rcode: Response code as determined by the userspace handler 517*607ca46eSDavid Howells * @length: Length of outgoing payload, in bytes 518*607ca46eSDavid Howells * @data: Userspace pointer to payload 519*607ca46eSDavid Howells * @handle: The handle from the &fw_cdev_event_request 520*607ca46eSDavid Howells * 521*607ca46eSDavid Howells * Send a response to an incoming request. By setting up an address range using 522*607ca46eSDavid Howells * the %FW_CDEV_IOC_ALLOCATE ioctl, userspace can listen for incoming requests. An 523*607ca46eSDavid Howells * incoming request will generate an %FW_CDEV_EVENT_REQUEST, and userspace must 524*607ca46eSDavid Howells * send a reply using this ioctl. The event has a handle to the kernel-side 525*607ca46eSDavid Howells * pending transaction, which should be used with this ioctl. 526*607ca46eSDavid Howells */ 527*607ca46eSDavid Howells struct fw_cdev_send_response { 528*607ca46eSDavid Howells __u32 rcode; 529*607ca46eSDavid Howells __u32 length; 530*607ca46eSDavid Howells __u64 data; 531*607ca46eSDavid Howells __u32 handle; 532*607ca46eSDavid Howells }; 533*607ca46eSDavid Howells 534*607ca46eSDavid Howells /** 535*607ca46eSDavid Howells * struct fw_cdev_allocate - Allocate a CSR in an address range 536*607ca46eSDavid Howells * @offset: Start offset of the address range 537*607ca46eSDavid Howells * @closure: To be passed back to userspace in request events 538*607ca46eSDavid Howells * @length: Length of the CSR, in bytes 539*607ca46eSDavid Howells * @handle: Handle to the allocation, written by the kernel 540*607ca46eSDavid Howells * @region_end: First address above the address range (added in ABI v4, 2.6.36) 541*607ca46eSDavid Howells * 542*607ca46eSDavid Howells * Allocate an address range in the 48-bit address space on the local node 543*607ca46eSDavid Howells * (the controller). This allows userspace to listen for requests with an 544*607ca46eSDavid Howells * offset within that address range. Every time when the kernel receives a 545*607ca46eSDavid Howells * request within the range, an &fw_cdev_event_request2 event will be emitted. 546*607ca46eSDavid Howells * (If the kernel or the client implements ABI version <= 3, an 547*607ca46eSDavid Howells * &fw_cdev_event_request will be generated instead.) 548*607ca46eSDavid Howells * 549*607ca46eSDavid Howells * The @closure field is passed back to userspace in these request events. 550*607ca46eSDavid Howells * The @handle field is an out parameter, returning a handle to the allocated 551*607ca46eSDavid Howells * range to be used for later deallocation of the range. 552*607ca46eSDavid Howells * 553*607ca46eSDavid Howells * The address range is allocated on all local nodes. The address allocation 554*607ca46eSDavid Howells * is exclusive except for the FCP command and response registers. If an 555*607ca46eSDavid Howells * exclusive address region is already in use, the ioctl fails with errno set 556*607ca46eSDavid Howells * to %EBUSY. 557*607ca46eSDavid Howells * 558*607ca46eSDavid Howells * If kernel and client implement ABI version >= 4, the kernel looks up a free 559*607ca46eSDavid Howells * spot of size @length inside [@offset..@region_end) and, if found, writes 560*607ca46eSDavid Howells * the start address of the new CSR back in @offset. I.e. @offset is an 561*607ca46eSDavid Howells * in and out parameter. If this automatic placement of a CSR in a bigger 562*607ca46eSDavid Howells * address range is not desired, the client simply needs to set @region_end 563*607ca46eSDavid Howells * = @offset + @length. 564*607ca46eSDavid Howells * 565*607ca46eSDavid Howells * If the kernel or the client implements ABI version <= 3, @region_end is 566*607ca46eSDavid Howells * ignored and effectively assumed to be @offset + @length. 567*607ca46eSDavid Howells * 568*607ca46eSDavid Howells * @region_end is only present in a kernel header >= 2.6.36. If necessary, 569*607ca46eSDavid Howells * this can for example be tested by #ifdef FW_CDEV_EVENT_REQUEST2. 570*607ca46eSDavid Howells */ 571*607ca46eSDavid Howells struct fw_cdev_allocate { 572*607ca46eSDavid Howells __u64 offset; 573*607ca46eSDavid Howells __u64 closure; 574*607ca46eSDavid Howells __u32 length; 575*607ca46eSDavid Howells __u32 handle; 576*607ca46eSDavid Howells __u64 region_end; /* available since kernel version 2.6.36 */ 577*607ca46eSDavid Howells }; 578*607ca46eSDavid Howells 579*607ca46eSDavid Howells /** 580*607ca46eSDavid Howells * struct fw_cdev_deallocate - Free a CSR address range or isochronous resource 581*607ca46eSDavid Howells * @handle: Handle to the address range or iso resource, as returned by the 582*607ca46eSDavid Howells * kernel when the range or resource was allocated 583*607ca46eSDavid Howells */ 584*607ca46eSDavid Howells struct fw_cdev_deallocate { 585*607ca46eSDavid Howells __u32 handle; 586*607ca46eSDavid Howells }; 587*607ca46eSDavid Howells 588*607ca46eSDavid Howells #define FW_CDEV_LONG_RESET 0 589*607ca46eSDavid Howells #define FW_CDEV_SHORT_RESET 1 590*607ca46eSDavid Howells 591*607ca46eSDavid Howells /** 592*607ca46eSDavid Howells * struct fw_cdev_initiate_bus_reset - Initiate a bus reset 593*607ca46eSDavid Howells * @type: %FW_CDEV_SHORT_RESET or %FW_CDEV_LONG_RESET 594*607ca46eSDavid Howells * 595*607ca46eSDavid Howells * Initiate a bus reset for the bus this device is on. The bus reset can be 596*607ca46eSDavid Howells * either the original (long) bus reset or the arbitrated (short) bus reset 597*607ca46eSDavid Howells * introduced in 1394a-2000. 598*607ca46eSDavid Howells * 599*607ca46eSDavid Howells * The ioctl returns immediately. A subsequent &fw_cdev_event_bus_reset 600*607ca46eSDavid Howells * indicates when the reset actually happened. Since ABI v4, this may be 601*607ca46eSDavid Howells * considerably later than the ioctl because the kernel ensures a grace period 602*607ca46eSDavid Howells * between subsequent bus resets as per IEEE 1394 bus management specification. 603*607ca46eSDavid Howells */ 604*607ca46eSDavid Howells struct fw_cdev_initiate_bus_reset { 605*607ca46eSDavid Howells __u32 type; 606*607ca46eSDavid Howells }; 607*607ca46eSDavid Howells 608*607ca46eSDavid Howells /** 609*607ca46eSDavid Howells * struct fw_cdev_add_descriptor - Add contents to the local node's config ROM 610*607ca46eSDavid Howells * @immediate: If non-zero, immediate key to insert before pointer 611*607ca46eSDavid Howells * @key: Upper 8 bits of root directory pointer 612*607ca46eSDavid Howells * @data: Userspace pointer to contents of descriptor block 613*607ca46eSDavid Howells * @length: Length of descriptor block data, in quadlets 614*607ca46eSDavid Howells * @handle: Handle to the descriptor, written by the kernel 615*607ca46eSDavid Howells * 616*607ca46eSDavid Howells * Add a descriptor block and optionally a preceding immediate key to the local 617*607ca46eSDavid Howells * node's Configuration ROM. 618*607ca46eSDavid Howells * 619*607ca46eSDavid Howells * The @key field specifies the upper 8 bits of the descriptor root directory 620*607ca46eSDavid Howells * pointer and the @data and @length fields specify the contents. The @key 621*607ca46eSDavid Howells * should be of the form 0xXX000000. The offset part of the root directory entry 622*607ca46eSDavid Howells * will be filled in by the kernel. 623*607ca46eSDavid Howells * 624*607ca46eSDavid Howells * If not 0, the @immediate field specifies an immediate key which will be 625*607ca46eSDavid Howells * inserted before the root directory pointer. 626*607ca46eSDavid Howells * 627*607ca46eSDavid Howells * @immediate, @key, and @data array elements are CPU-endian quadlets. 628*607ca46eSDavid Howells * 629*607ca46eSDavid Howells * If successful, the kernel adds the descriptor and writes back a @handle to 630*607ca46eSDavid Howells * the kernel-side object to be used for later removal of the descriptor block 631*607ca46eSDavid Howells * and immediate key. The kernel will also generate a bus reset to signal the 632*607ca46eSDavid Howells * change of the Configuration ROM to other nodes. 633*607ca46eSDavid Howells * 634*607ca46eSDavid Howells * This ioctl affects the Configuration ROMs of all local nodes. 635*607ca46eSDavid Howells * The ioctl only succeeds on device files which represent a local node. 636*607ca46eSDavid Howells */ 637*607ca46eSDavid Howells struct fw_cdev_add_descriptor { 638*607ca46eSDavid Howells __u32 immediate; 639*607ca46eSDavid Howells __u32 key; 640*607ca46eSDavid Howells __u64 data; 641*607ca46eSDavid Howells __u32 length; 642*607ca46eSDavid Howells __u32 handle; 643*607ca46eSDavid Howells }; 644*607ca46eSDavid Howells 645*607ca46eSDavid Howells /** 646*607ca46eSDavid Howells * struct fw_cdev_remove_descriptor - Remove contents from the Configuration ROM 647*607ca46eSDavid Howells * @handle: Handle to the descriptor, as returned by the kernel when the 648*607ca46eSDavid Howells * descriptor was added 649*607ca46eSDavid Howells * 650*607ca46eSDavid Howells * Remove a descriptor block and accompanying immediate key from the local 651*607ca46eSDavid Howells * nodes' Configuration ROMs. The kernel will also generate a bus reset to 652*607ca46eSDavid Howells * signal the change of the Configuration ROM to other nodes. 653*607ca46eSDavid Howells */ 654*607ca46eSDavid Howells struct fw_cdev_remove_descriptor { 655*607ca46eSDavid Howells __u32 handle; 656*607ca46eSDavid Howells }; 657*607ca46eSDavid Howells 658*607ca46eSDavid Howells #define FW_CDEV_ISO_CONTEXT_TRANSMIT 0 659*607ca46eSDavid Howells #define FW_CDEV_ISO_CONTEXT_RECEIVE 1 660*607ca46eSDavid Howells #define FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL 2 /* added in 2.6.36 */ 661*607ca46eSDavid Howells 662*607ca46eSDavid Howells /** 663*607ca46eSDavid Howells * struct fw_cdev_create_iso_context - Create a context for isochronous I/O 664*607ca46eSDavid Howells * @type: %FW_CDEV_ISO_CONTEXT_TRANSMIT or %FW_CDEV_ISO_CONTEXT_RECEIVE or 665*607ca46eSDavid Howells * %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL 666*607ca46eSDavid Howells * @header_size: Header size to strip in single-channel reception 667*607ca46eSDavid Howells * @channel: Channel to bind to in single-channel reception or transmission 668*607ca46eSDavid Howells * @speed: Transmission speed 669*607ca46eSDavid Howells * @closure: To be returned in &fw_cdev_event_iso_interrupt or 670*607ca46eSDavid Howells * &fw_cdev_event_iso_interrupt_multichannel 671*607ca46eSDavid Howells * @handle: Handle to context, written back by kernel 672*607ca46eSDavid Howells * 673*607ca46eSDavid Howells * Prior to sending or receiving isochronous I/O, a context must be created. 674*607ca46eSDavid Howells * The context records information about the transmit or receive configuration 675*607ca46eSDavid Howells * and typically maps to an underlying hardware resource. A context is set up 676*607ca46eSDavid Howells * for either sending or receiving. It is bound to a specific isochronous 677*607ca46eSDavid Howells * @channel. 678*607ca46eSDavid Howells * 679*607ca46eSDavid Howells * In case of multichannel reception, @header_size and @channel are ignored 680*607ca46eSDavid Howells * and the channels are selected by %FW_CDEV_IOC_SET_ISO_CHANNELS. 681*607ca46eSDavid Howells * 682*607ca46eSDavid Howells * For %FW_CDEV_ISO_CONTEXT_RECEIVE contexts, @header_size must be at least 4 683*607ca46eSDavid Howells * and must be a multiple of 4. It is ignored in other context types. 684*607ca46eSDavid Howells * 685*607ca46eSDavid Howells * @speed is ignored in receive context types. 686*607ca46eSDavid Howells * 687*607ca46eSDavid Howells * If a context was successfully created, the kernel writes back a handle to the 688*607ca46eSDavid Howells * context, which must be passed in for subsequent operations on that context. 689*607ca46eSDavid Howells * 690*607ca46eSDavid Howells * Limitations: 691*607ca46eSDavid Howells * No more than one iso context can be created per fd. 692*607ca46eSDavid Howells * The total number of contexts that all userspace and kernelspace drivers can 693*607ca46eSDavid Howells * create on a card at a time is a hardware limit, typically 4 or 8 contexts per 694*607ca46eSDavid Howells * direction, and of them at most one multichannel receive context. 695*607ca46eSDavid Howells */ 696*607ca46eSDavid Howells struct fw_cdev_create_iso_context { 697*607ca46eSDavid Howells __u32 type; 698*607ca46eSDavid Howells __u32 header_size; 699*607ca46eSDavid Howells __u32 channel; 700*607ca46eSDavid Howells __u32 speed; 701*607ca46eSDavid Howells __u64 closure; 702*607ca46eSDavid Howells __u32 handle; 703*607ca46eSDavid Howells }; 704*607ca46eSDavid Howells 705*607ca46eSDavid Howells /** 706*607ca46eSDavid Howells * struct fw_cdev_set_iso_channels - Select channels in multichannel reception 707*607ca46eSDavid Howells * @channels: Bitmask of channels to listen to 708*607ca46eSDavid Howells * @handle: Handle of the mutichannel receive context 709*607ca46eSDavid Howells * 710*607ca46eSDavid Howells * @channels is the bitwise or of 1ULL << n for each channel n to listen to. 711*607ca46eSDavid Howells * 712*607ca46eSDavid Howells * The ioctl fails with errno %EBUSY if there is already another receive context 713*607ca46eSDavid Howells * on a channel in @channels. In that case, the bitmask of all unoccupied 714*607ca46eSDavid Howells * channels is returned in @channels. 715*607ca46eSDavid Howells */ 716*607ca46eSDavid Howells struct fw_cdev_set_iso_channels { 717*607ca46eSDavid Howells __u64 channels; 718*607ca46eSDavid Howells __u32 handle; 719*607ca46eSDavid Howells }; 720*607ca46eSDavid Howells 721*607ca46eSDavid Howells #define FW_CDEV_ISO_PAYLOAD_LENGTH(v) (v) 722*607ca46eSDavid Howells #define FW_CDEV_ISO_INTERRUPT (1 << 16) 723*607ca46eSDavid Howells #define FW_CDEV_ISO_SKIP (1 << 17) 724*607ca46eSDavid Howells #define FW_CDEV_ISO_SYNC (1 << 17) 725*607ca46eSDavid Howells #define FW_CDEV_ISO_TAG(v) ((v) << 18) 726*607ca46eSDavid Howells #define FW_CDEV_ISO_SY(v) ((v) << 20) 727*607ca46eSDavid Howells #define FW_CDEV_ISO_HEADER_LENGTH(v) ((v) << 24) 728*607ca46eSDavid Howells 729*607ca46eSDavid Howells /** 730*607ca46eSDavid Howells * struct fw_cdev_iso_packet - Isochronous packet 731*607ca46eSDavid Howells * @control: Contains the header length (8 uppermost bits), 732*607ca46eSDavid Howells * the sy field (4 bits), the tag field (2 bits), a sync flag 733*607ca46eSDavid Howells * or a skip flag (1 bit), an interrupt flag (1 bit), and the 734*607ca46eSDavid Howells * payload length (16 lowermost bits) 735*607ca46eSDavid Howells * @header: Header and payload in case of a transmit context. 736*607ca46eSDavid Howells * 737*607ca46eSDavid Howells * &struct fw_cdev_iso_packet is used to describe isochronous packet queues. 738*607ca46eSDavid Howells * Use the FW_CDEV_ISO_ macros to fill in @control. 739*607ca46eSDavid Howells * The @header array is empty in case of receive contexts. 740*607ca46eSDavid Howells * 741*607ca46eSDavid Howells * Context type %FW_CDEV_ISO_CONTEXT_TRANSMIT: 742*607ca46eSDavid Howells * 743*607ca46eSDavid Howells * @control.HEADER_LENGTH must be a multiple of 4. It specifies the numbers of 744*607ca46eSDavid Howells * bytes in @header that will be prepended to the packet's payload. These bytes 745*607ca46eSDavid Howells * are copied into the kernel and will not be accessed after the ioctl has 746*607ca46eSDavid Howells * returned. 747*607ca46eSDavid Howells * 748*607ca46eSDavid Howells * The @control.SY and TAG fields are copied to the iso packet header. These 749*607ca46eSDavid Howells * fields are specified by IEEE 1394a and IEC 61883-1. 750*607ca46eSDavid Howells * 751*607ca46eSDavid Howells * The @control.SKIP flag specifies that no packet is to be sent in a frame. 752*607ca46eSDavid Howells * When using this, all other fields except @control.INTERRUPT must be zero. 753*607ca46eSDavid Howells * 754*607ca46eSDavid Howells * When a packet with the @control.INTERRUPT flag set has been completed, an 755*607ca46eSDavid Howells * &fw_cdev_event_iso_interrupt event will be sent. 756*607ca46eSDavid Howells * 757*607ca46eSDavid Howells * Context type %FW_CDEV_ISO_CONTEXT_RECEIVE: 758*607ca46eSDavid Howells * 759*607ca46eSDavid Howells * @control.HEADER_LENGTH must be a multiple of the context's header_size. 760*607ca46eSDavid Howells * If the HEADER_LENGTH is larger than the context's header_size, multiple 761*607ca46eSDavid Howells * packets are queued for this entry. 762*607ca46eSDavid Howells * 763*607ca46eSDavid Howells * The @control.SY and TAG fields are ignored. 764*607ca46eSDavid Howells * 765*607ca46eSDavid Howells * If the @control.SYNC flag is set, the context drops all packets until a 766*607ca46eSDavid Howells * packet with a sy field is received which matches &fw_cdev_start_iso.sync. 767*607ca46eSDavid Howells * 768*607ca46eSDavid Howells * @control.PAYLOAD_LENGTH defines how many payload bytes can be received for 769*607ca46eSDavid Howells * one packet (in addition to payload quadlets that have been defined as headers 770*607ca46eSDavid Howells * and are stripped and returned in the &fw_cdev_event_iso_interrupt structure). 771*607ca46eSDavid Howells * If more bytes are received, the additional bytes are dropped. If less bytes 772*607ca46eSDavid Howells * are received, the remaining bytes in this part of the payload buffer will not 773*607ca46eSDavid Howells * be written to, not even by the next packet. I.e., packets received in 774*607ca46eSDavid Howells * consecutive frames will not necessarily be consecutive in memory. If an 775*607ca46eSDavid Howells * entry has queued multiple packets, the PAYLOAD_LENGTH is divided equally 776*607ca46eSDavid Howells * among them. 777*607ca46eSDavid Howells * 778*607ca46eSDavid Howells * When a packet with the @control.INTERRUPT flag set has been completed, an 779*607ca46eSDavid Howells * &fw_cdev_event_iso_interrupt event will be sent. An entry that has queued 780*607ca46eSDavid Howells * multiple receive packets is completed when its last packet is completed. 781*607ca46eSDavid Howells * 782*607ca46eSDavid Howells * Context type %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL: 783*607ca46eSDavid Howells * 784*607ca46eSDavid Howells * Here, &fw_cdev_iso_packet would be more aptly named _iso_buffer_chunk since 785*607ca46eSDavid Howells * it specifies a chunk of the mmap()'ed buffer, while the number and alignment 786*607ca46eSDavid Howells * of packets to be placed into the buffer chunk is not known beforehand. 787*607ca46eSDavid Howells * 788*607ca46eSDavid Howells * @control.PAYLOAD_LENGTH is the size of the buffer chunk and specifies room 789*607ca46eSDavid Howells * for header, payload, padding, and trailer bytes of one or more packets. 790*607ca46eSDavid Howells * It must be a multiple of 4. 791*607ca46eSDavid Howells * 792*607ca46eSDavid Howells * @control.HEADER_LENGTH, TAG and SY are ignored. SYNC is treated as described 793*607ca46eSDavid Howells * for single-channel reception. 794*607ca46eSDavid Howells * 795*607ca46eSDavid Howells * When a buffer chunk with the @control.INTERRUPT flag set has been filled 796*607ca46eSDavid Howells * entirely, an &fw_cdev_event_iso_interrupt_mc event will be sent. 797*607ca46eSDavid Howells */ 798*607ca46eSDavid Howells struct fw_cdev_iso_packet { 799*607ca46eSDavid Howells __u32 control; 800*607ca46eSDavid Howells __u32 header[0]; 801*607ca46eSDavid Howells }; 802*607ca46eSDavid Howells 803*607ca46eSDavid Howells /** 804*607ca46eSDavid Howells * struct fw_cdev_queue_iso - Queue isochronous packets for I/O 805*607ca46eSDavid Howells * @packets: Userspace pointer to an array of &fw_cdev_iso_packet 806*607ca46eSDavid Howells * @data: Pointer into mmap()'ed payload buffer 807*607ca46eSDavid Howells * @size: Size of the @packets array, in bytes 808*607ca46eSDavid Howells * @handle: Isochronous context handle 809*607ca46eSDavid Howells * 810*607ca46eSDavid Howells * Queue a number of isochronous packets for reception or transmission. 811*607ca46eSDavid Howells * This ioctl takes a pointer to an array of &fw_cdev_iso_packet structs, 812*607ca46eSDavid Howells * which describe how to transmit from or receive into a contiguous region 813*607ca46eSDavid Howells * of a mmap()'ed payload buffer. As part of transmit packet descriptors, 814*607ca46eSDavid Howells * a series of headers can be supplied, which will be prepended to the 815*607ca46eSDavid Howells * payload during DMA. 816*607ca46eSDavid Howells * 817*607ca46eSDavid Howells * The kernel may or may not queue all packets, but will write back updated 818*607ca46eSDavid Howells * values of the @packets, @data and @size fields, so the ioctl can be 819*607ca46eSDavid Howells * resubmitted easily. 820*607ca46eSDavid Howells * 821*607ca46eSDavid Howells * In case of a multichannel receive context, @data must be quadlet-aligned 822*607ca46eSDavid Howells * relative to the buffer start. 823*607ca46eSDavid Howells */ 824*607ca46eSDavid Howells struct fw_cdev_queue_iso { 825*607ca46eSDavid Howells __u64 packets; 826*607ca46eSDavid Howells __u64 data; 827*607ca46eSDavid Howells __u32 size; 828*607ca46eSDavid Howells __u32 handle; 829*607ca46eSDavid Howells }; 830*607ca46eSDavid Howells 831*607ca46eSDavid Howells #define FW_CDEV_ISO_CONTEXT_MATCH_TAG0 1 832*607ca46eSDavid Howells #define FW_CDEV_ISO_CONTEXT_MATCH_TAG1 2 833*607ca46eSDavid Howells #define FW_CDEV_ISO_CONTEXT_MATCH_TAG2 4 834*607ca46eSDavid Howells #define FW_CDEV_ISO_CONTEXT_MATCH_TAG3 8 835*607ca46eSDavid Howells #define FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS 15 836*607ca46eSDavid Howells 837*607ca46eSDavid Howells /** 838*607ca46eSDavid Howells * struct fw_cdev_start_iso - Start an isochronous transmission or reception 839*607ca46eSDavid Howells * @cycle: Cycle in which to start I/O. If @cycle is greater than or 840*607ca46eSDavid Howells * equal to 0, the I/O will start on that cycle. 841*607ca46eSDavid Howells * @sync: Determines the value to wait for for receive packets that have 842*607ca46eSDavid Howells * the %FW_CDEV_ISO_SYNC bit set 843*607ca46eSDavid Howells * @tags: Tag filter bit mask. Only valid for isochronous reception. 844*607ca46eSDavid Howells * Determines the tag values for which packets will be accepted. 845*607ca46eSDavid Howells * Use FW_CDEV_ISO_CONTEXT_MATCH_ macros to set @tags. 846*607ca46eSDavid Howells * @handle: Isochronous context handle within which to transmit or receive 847*607ca46eSDavid Howells */ 848*607ca46eSDavid Howells struct fw_cdev_start_iso { 849*607ca46eSDavid Howells __s32 cycle; 850*607ca46eSDavid Howells __u32 sync; 851*607ca46eSDavid Howells __u32 tags; 852*607ca46eSDavid Howells __u32 handle; 853*607ca46eSDavid Howells }; 854*607ca46eSDavid Howells 855*607ca46eSDavid Howells /** 856*607ca46eSDavid Howells * struct fw_cdev_stop_iso - Stop an isochronous transmission or reception 857*607ca46eSDavid Howells * @handle: Handle of isochronous context to stop 858*607ca46eSDavid Howells */ 859*607ca46eSDavid Howells struct fw_cdev_stop_iso { 860*607ca46eSDavid Howells __u32 handle; 861*607ca46eSDavid Howells }; 862*607ca46eSDavid Howells 863*607ca46eSDavid Howells /** 864*607ca46eSDavid Howells * struct fw_cdev_flush_iso - flush completed iso packets 865*607ca46eSDavid Howells * @handle: handle of isochronous context to flush 866*607ca46eSDavid Howells * 867*607ca46eSDavid Howells * For %FW_CDEV_ISO_CONTEXT_TRANSMIT or %FW_CDEV_ISO_CONTEXT_RECEIVE contexts, 868*607ca46eSDavid Howells * report any completed packets. 869*607ca46eSDavid Howells * 870*607ca46eSDavid Howells * For %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL contexts, report the current 871*607ca46eSDavid Howells * offset in the receive buffer, if it has changed; this is typically in the 872*607ca46eSDavid Howells * middle of some buffer chunk. 873*607ca46eSDavid Howells * 874*607ca46eSDavid Howells * Any %FW_CDEV_EVENT_ISO_INTERRUPT or %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL 875*607ca46eSDavid Howells * events generated by this ioctl are sent synchronously, i.e., are available 876*607ca46eSDavid Howells * for reading from the file descriptor when this ioctl returns. 877*607ca46eSDavid Howells */ 878*607ca46eSDavid Howells struct fw_cdev_flush_iso { 879*607ca46eSDavid Howells __u32 handle; 880*607ca46eSDavid Howells }; 881*607ca46eSDavid Howells 882*607ca46eSDavid Howells /** 883*607ca46eSDavid Howells * struct fw_cdev_get_cycle_timer - read cycle timer register 884*607ca46eSDavid Howells * @local_time: system time, in microseconds since the Epoch 885*607ca46eSDavid Howells * @cycle_timer: Cycle Time register contents 886*607ca46eSDavid Howells * 887*607ca46eSDavid Howells * Same as %FW_CDEV_IOC_GET_CYCLE_TIMER2, but fixed to use %CLOCK_REALTIME 888*607ca46eSDavid Howells * and only with microseconds resolution. 889*607ca46eSDavid Howells * 890*607ca46eSDavid Howells * In version 1 and 2 of the ABI, this ioctl returned unreliable (non- 891*607ca46eSDavid Howells * monotonic) @cycle_timer values on certain controllers. 892*607ca46eSDavid Howells */ 893*607ca46eSDavid Howells struct fw_cdev_get_cycle_timer { 894*607ca46eSDavid Howells __u64 local_time; 895*607ca46eSDavid Howells __u32 cycle_timer; 896*607ca46eSDavid Howells }; 897*607ca46eSDavid Howells 898*607ca46eSDavid Howells /** 899*607ca46eSDavid Howells * struct fw_cdev_get_cycle_timer2 - read cycle timer register 900*607ca46eSDavid Howells * @tv_sec: system time, seconds 901*607ca46eSDavid Howells * @tv_nsec: system time, sub-seconds part in nanoseconds 902*607ca46eSDavid Howells * @clk_id: input parameter, clock from which to get the system time 903*607ca46eSDavid Howells * @cycle_timer: Cycle Time register contents 904*607ca46eSDavid Howells * 905*607ca46eSDavid Howells * The %FW_CDEV_IOC_GET_CYCLE_TIMER2 ioctl reads the isochronous cycle timer 906*607ca46eSDavid Howells * and also the system clock. This allows to correlate reception time of 907*607ca46eSDavid Howells * isochronous packets with system time. 908*607ca46eSDavid Howells * 909*607ca46eSDavid Howells * @clk_id lets you choose a clock like with POSIX' clock_gettime function. 910*607ca46eSDavid Howells * Supported @clk_id values are POSIX' %CLOCK_REALTIME and %CLOCK_MONOTONIC 911*607ca46eSDavid Howells * and Linux' %CLOCK_MONOTONIC_RAW. 912*607ca46eSDavid Howells * 913*607ca46eSDavid Howells * @cycle_timer consists of 7 bits cycleSeconds, 13 bits cycleCount, and 914*607ca46eSDavid Howells * 12 bits cycleOffset, in host byte order. Cf. the Cycle Time register 915*607ca46eSDavid Howells * per IEEE 1394 or Isochronous Cycle Timer register per OHCI-1394. 916*607ca46eSDavid Howells */ 917*607ca46eSDavid Howells struct fw_cdev_get_cycle_timer2 { 918*607ca46eSDavid Howells __s64 tv_sec; 919*607ca46eSDavid Howells __s32 tv_nsec; 920*607ca46eSDavid Howells __s32 clk_id; 921*607ca46eSDavid Howells __u32 cycle_timer; 922*607ca46eSDavid Howells }; 923*607ca46eSDavid Howells 924*607ca46eSDavid Howells /** 925*607ca46eSDavid Howells * struct fw_cdev_allocate_iso_resource - (De)allocate a channel or bandwidth 926*607ca46eSDavid Howells * @closure: Passed back to userspace in corresponding iso resource events 927*607ca46eSDavid Howells * @channels: Isochronous channels of which one is to be (de)allocated 928*607ca46eSDavid Howells * @bandwidth: Isochronous bandwidth units to be (de)allocated 929*607ca46eSDavid Howells * @handle: Handle to the allocation, written by the kernel (only valid in 930*607ca46eSDavid Howells * case of %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE ioctls) 931*607ca46eSDavid Howells * 932*607ca46eSDavid Howells * The %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE ioctl initiates allocation of an 933*607ca46eSDavid Howells * isochronous channel and/or of isochronous bandwidth at the isochronous 934*607ca46eSDavid Howells * resource manager (IRM). Only one of the channels specified in @channels is 935*607ca46eSDavid Howells * allocated. An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED is sent after 936*607ca46eSDavid Howells * communication with the IRM, indicating success or failure in the event data. 937*607ca46eSDavid Howells * The kernel will automatically reallocate the resources after bus resets. 938*607ca46eSDavid Howells * Should a reallocation fail, an %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event 939*607ca46eSDavid Howells * will be sent. The kernel will also automatically deallocate the resources 940*607ca46eSDavid Howells * when the file descriptor is closed. 941*607ca46eSDavid Howells * 942*607ca46eSDavid Howells * The %FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE ioctl can be used to initiate 943*607ca46eSDavid Howells * deallocation of resources which were allocated as described above. 944*607ca46eSDavid Howells * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event concludes this operation. 945*607ca46eSDavid Howells * 946*607ca46eSDavid Howells * The %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE ioctl is a variant of allocation 947*607ca46eSDavid Howells * without automatic re- or deallocation. 948*607ca46eSDavid Howells * An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED event concludes this operation, 949*607ca46eSDavid Howells * indicating success or failure in its data. 950*607ca46eSDavid Howells * 951*607ca46eSDavid Howells * The %FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE_ONCE ioctl works like 952*607ca46eSDavid Howells * %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE except that resources are freed 953*607ca46eSDavid Howells * instead of allocated. 954*607ca46eSDavid Howells * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event concludes this operation. 955*607ca46eSDavid Howells * 956*607ca46eSDavid Howells * To summarize, %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE allocates iso resources 957*607ca46eSDavid Howells * for the lifetime of the fd or @handle. 958*607ca46eSDavid Howells * In contrast, %FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE allocates iso resources 959*607ca46eSDavid Howells * for the duration of a bus generation. 960*607ca46eSDavid Howells * 961*607ca46eSDavid Howells * @channels is a host-endian bitfield with the least significant bit 962*607ca46eSDavid Howells * representing channel 0 and the most significant bit representing channel 63: 963*607ca46eSDavid Howells * 1ULL << c for each channel c that is a candidate for (de)allocation. 964*607ca46eSDavid Howells * 965*607ca46eSDavid Howells * @bandwidth is expressed in bandwidth allocation units, i.e. the time to send 966*607ca46eSDavid Howells * one quadlet of data (payload or header data) at speed S1600. 967*607ca46eSDavid Howells */ 968*607ca46eSDavid Howells struct fw_cdev_allocate_iso_resource { 969*607ca46eSDavid Howells __u64 closure; 970*607ca46eSDavid Howells __u64 channels; 971*607ca46eSDavid Howells __u32 bandwidth; 972*607ca46eSDavid Howells __u32 handle; 973*607ca46eSDavid Howells }; 974*607ca46eSDavid Howells 975*607ca46eSDavid Howells /** 976*607ca46eSDavid Howells * struct fw_cdev_send_stream_packet - send an asynchronous stream packet 977*607ca46eSDavid Howells * @length: Length of outgoing payload, in bytes 978*607ca46eSDavid Howells * @tag: Data format tag 979*607ca46eSDavid Howells * @channel: Isochronous channel to transmit to 980*607ca46eSDavid Howells * @sy: Synchronization code 981*607ca46eSDavid Howells * @closure: Passed back to userspace in the response event 982*607ca46eSDavid Howells * @data: Userspace pointer to payload 983*607ca46eSDavid Howells * @generation: The bus generation where packet is valid 984*607ca46eSDavid Howells * @speed: Speed to transmit at 985*607ca46eSDavid Howells * 986*607ca46eSDavid Howells * The %FW_CDEV_IOC_SEND_STREAM_PACKET ioctl sends an asynchronous stream packet 987*607ca46eSDavid Howells * to every device which is listening to the specified channel. The kernel 988*607ca46eSDavid Howells * writes an &fw_cdev_event_response event which indicates success or failure of 989*607ca46eSDavid Howells * the transmission. 990*607ca46eSDavid Howells */ 991*607ca46eSDavid Howells struct fw_cdev_send_stream_packet { 992*607ca46eSDavid Howells __u32 length; 993*607ca46eSDavid Howells __u32 tag; 994*607ca46eSDavid Howells __u32 channel; 995*607ca46eSDavid Howells __u32 sy; 996*607ca46eSDavid Howells __u64 closure; 997*607ca46eSDavid Howells __u64 data; 998*607ca46eSDavid Howells __u32 generation; 999*607ca46eSDavid Howells __u32 speed; 1000*607ca46eSDavid Howells }; 1001*607ca46eSDavid Howells 1002*607ca46eSDavid Howells /** 1003*607ca46eSDavid Howells * struct fw_cdev_send_phy_packet - send a PHY packet 1004*607ca46eSDavid Howells * @closure: Passed back to userspace in the PHY-packet-sent event 1005*607ca46eSDavid Howells * @data: First and second quadlet of the PHY packet 1006*607ca46eSDavid Howells * @generation: The bus generation where packet is valid 1007*607ca46eSDavid Howells * 1008*607ca46eSDavid Howells * The %FW_CDEV_IOC_SEND_PHY_PACKET ioctl sends a PHY packet to all nodes 1009*607ca46eSDavid Howells * on the same card as this device. After transmission, an 1010*607ca46eSDavid Howells * %FW_CDEV_EVENT_PHY_PACKET_SENT event is generated. 1011*607ca46eSDavid Howells * 1012*607ca46eSDavid Howells * The payload @data[] shall be specified in host byte order. Usually, 1013*607ca46eSDavid Howells * @data[1] needs to be the bitwise inverse of @data[0]. VersaPHY packets 1014*607ca46eSDavid Howells * are an exception to this rule. 1015*607ca46eSDavid Howells * 1016*607ca46eSDavid Howells * The ioctl is only permitted on device files which represent a local node. 1017*607ca46eSDavid Howells */ 1018*607ca46eSDavid Howells struct fw_cdev_send_phy_packet { 1019*607ca46eSDavid Howells __u64 closure; 1020*607ca46eSDavid Howells __u32 data[2]; 1021*607ca46eSDavid Howells __u32 generation; 1022*607ca46eSDavid Howells }; 1023*607ca46eSDavid Howells 1024*607ca46eSDavid Howells /** 1025*607ca46eSDavid Howells * struct fw_cdev_receive_phy_packets - start reception of PHY packets 1026*607ca46eSDavid Howells * @closure: Passed back to userspace in phy packet events 1027*607ca46eSDavid Howells * 1028*607ca46eSDavid Howells * This ioctl activates issuing of %FW_CDEV_EVENT_PHY_PACKET_RECEIVED due to 1029*607ca46eSDavid Howells * incoming PHY packets from any node on the same bus as the device. 1030*607ca46eSDavid Howells * 1031*607ca46eSDavid Howells * The ioctl is only permitted on device files which represent a local node. 1032*607ca46eSDavid Howells */ 1033*607ca46eSDavid Howells struct fw_cdev_receive_phy_packets { 1034*607ca46eSDavid Howells __u64 closure; 1035*607ca46eSDavid Howells }; 1036*607ca46eSDavid Howells 1037*607ca46eSDavid Howells #define FW_CDEV_VERSION 3 /* Meaningless legacy macro; don't use it. */ 1038*607ca46eSDavid Howells 1039*607ca46eSDavid Howells #endif /* _LINUX_FIREWIRE_CDEV_H */ 1040