/* * Char device interface. * * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ #ifndef _LINUX_FIREWIRE_CDEV_H#define _LINUX_FIREWIRE_CDEV_H #include <linux/ioctl.h>#include <linux/types.h>#include <linux/firewire-constants.h> /* available since kernel version 2.6.22 */#define FW_CDEV_EVENT_BUS_RESET 0x00#define FW_CDEV_EVENT_RESPONSE 0x01#define FW_CDEV_EVENT_REQUEST 0x02#define FW_CDEV_EVENT_ISO_INTERRUPT 0x03 /* available since kernel version 2.6.30 */#define FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED 0x04#define FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED 0x05 /* available since kernel version 2.6.36 */#define FW_CDEV_EVENT_REQUEST2 0x06#define FW_CDEV_EVENT_PHY_PACKET_SENT 0x07#define FW_CDEV_EVENT_PHY_PACKET_RECEIVED 0x08#define FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL 0x09 /** * struct fw_cdev_event_common - Common part of all fw_cdev_event_ types * @closure: For arbitrary use by userspace * @type: Discriminates the fw_cdev_event_ types * * This struct may be used to access generic members of all fw_cdev_event_ * types regardless of the specific type. * * Data passed in the @closure field for a request will be returned in the * corresponding event. It is big enough to hold a pointer on all platforms. * The ioctl used to set @closure depends on the @type of event. */struct fw_cdev_event_common { __u64 closure; __u32 type;}; /** * struct fw_cdev_event_bus_reset - Sent when a bus reset occurred * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_GET_INFO ioctl * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_BUS_RESET * @node_id: New node ID of this node * @local_node_id: Node ID of the local node, i.e. of the controller * @bm_node_id: Node ID of the bus manager * @irm_node_id: Node ID of the iso resource manager * @root_node_id: Node ID of the root node * @generation: New bus generation * * This event is sent when the bus the device belongs to goes through a bus * reset. It provides information about the new bus configuration, such as * new node ID for this device, new root ID, and others. * * If @bm_node_id is 0xffff right after bus reset it can be reread by an * %FW_CDEV_IOC_GET_INFO ioctl after bus manager selection was finished. * Kernels with ABI version < 4 do not set @bm_node_id. */struct fw_cdev_event_bus_reset { __u64 closure; __u32 type; __u32 node_id; __u32 local_node_id; __u32 bm_node_id; __u32 irm_node_id; __u32 root_node_id; __u32 generation;}; /** * struct fw_cdev_event_response - Sent when a response packet was received * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_SEND_REQUEST * or %FW_CDEV_IOC_SEND_BROADCAST_REQUEST * or %FW_CDEV_IOC_SEND_STREAM_PACKET ioctl * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_RESPONSE * @rcode: Response code returned by the remote node * @length: Data length, i.e. the response's payload size in bytes * @data: Payload data, if any * * This event is sent when the stack receives a response to an outgoing request * sent by %FW_CDEV_IOC_SEND_REQUEST ioctl. The payload data for responses * carrying data (read and lock responses) follows immediately and can be * accessed through the @data field. * * The event is also generated after conclusions of transactions that do not * involve response packets. This includes unified write transactions, * broadcast write transactions, and transmission of asynchronous stream * packets. @rcode indicates success or failure of such transmissions. */struct fw_cdev_event_response { __u64 closure; __u32 type; __u32 rcode; __u32 length; __u32 data[0];}; /** * struct fw_cdev_event_request - Old version of &fw_cdev_event_request2 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_REQUEST * * This event is sent instead of &fw_cdev_event_request2 if the kernel or * the client implements ABI version <= 3. &fw_cdev_event_request lacks * essential information; use &fw_cdev_event_request2 instead. */struct fw_cdev_event_request { __u64 closure; __u32 type; __u32 tcode; __u64 offset; __u32 handle; __u32 length; __u32 data[0];}; /** * struct fw_cdev_event_request2 - Sent on incoming request to an address region * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_ALLOCATE ioctl * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_REQUEST2 * @tcode: Transaction code of the incoming request * @offset: The offset into the 48-bit per-node address space * @source_node_id: Sender node ID * @destination_node_id: Destination node ID * @card: The index of the card from which the request came * @generation: Bus generation in which the request is valid * @handle: Reference to the kernel-side pending request * @length: Data length, i.e. the request's payload size in bytes * @data: Incoming data, if any * * This event is sent when the stack receives an incoming request to an address * region registered using the %FW_CDEV_IOC_ALLOCATE ioctl. The request is * guaranteed to be completely contained in the specified region. Userspace is * responsible for sending the response by %FW_CDEV_IOC_SEND_RESPONSE ioctl, * using the same @handle. * * The payload data for requests carrying data (write and lock requests) * follows immediately and can be accessed through the @data field. * * Unlike &fw_cdev_event_request, @tcode of lock requests is one of the * firewire-core specific %TCODE_LOCK_MASK_SWAP...%TCODE_LOCK_VENDOR_DEPENDENT, * i.e. encodes the extended transaction code. * * @card may differ from &fw_cdev_get_info.card because requests are received * from all cards of the Linux host. @source_node_id, @destination_node_id, and * @generation pertain to that card. Destination node ID and bus generation may * therefore differ from the corresponding fields of the last * &fw_cdev_event_bus_reset. * * @destination_node_id may also differ from the current node ID because of a * non-local bus ID part or in case of a broadcast write request. Note, a * client must call an %FW_CDEV_IOC_SEND_RESPONSE ioctl even in case of a * broadcast write request; the kernel will then release the kernel-side pending * request but will not actually send a response packet. * * In case of a write request to FCP_REQUEST or FCP_RESPONSE, the kernel already * sent a write response immediately after the request was received; in this * case the client must still call an %FW_CDEV_IOC_SEND_RESPONSE ioctl to * release the kernel-side pending request, though another response won't be * sent. * * If the client subsequently needs to initiate requests to the sender node of * an &fw_cdev_event_request2, it needs to use a device file with matching * card index, node ID, and generation for outbound requests. */struct fw_cdev_event_request2 { __u64 closure; __u32 type; __u32 tcode; __u64 offset; __u32 source_node_id; __u32 destination_node_id; __u32 card; __u32 generation; __u32 handle; __u32 length; __u32 data[0];}; /** * struct fw_cdev_event_iso_interrupt - Sent when an iso packet was completed * @closure: See &fw_cdev_event_common; * set by %FW_CDEV_CREATE_ISO_CONTEXT ioctl * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_ISO_INTERRUPT * @cycle: Cycle counter of the last completed packet * @header_length: Total length of following headers, in bytes * @header: Stripped headers, if any * * This event is sent when the controller has completed an &fw_cdev_iso_packet * with the %FW_CDEV_ISO_INTERRUPT bit set, when explicitly requested with * %FW_CDEV_IOC_FLUSH_ISO, or when there have been so many completed packets * without the interrupt bit set that the kernel's internal buffer for @header * is about to overflow. (In the last case, ABI versions < 5 drop header data * up to the next interrupt packet.) * * Isochronous transmit events (context type %FW_CDEV_ISO_CONTEXT_TRANSMIT): * * In version 3 and some implementations of version 2 of the ABI, &header_length * is a multiple of 4 and &header contains timestamps of all packets up until * the interrupt packet. The format of the timestamps is as described below for * isochronous reception. In version 1 of the ABI, &header_length was 0. * * Isochronous receive events (context type %FW_CDEV_ISO_CONTEXT_RECEIVE): * * The headers stripped of all packets up until and including the interrupt * packet are returned in the @header field. The amount of header data per * packet is as specified at iso context creation by * &fw_cdev_create_iso_context.header_size. * * Hence, _interrupt.header_length / _context.header_size is the number of * packets received in this interrupt event. The client can now iterate * through the mmap()'ed DMA buffer according to this number of packets and * to the buffer sizes as the client specified in &fw_cdev_queue_iso. * * Since version 2 of this ABI, the portion for each packet in _interrupt.header * consists of the 1394 isochronous packet header, followed by a timestamp * quadlet if &fw_cdev_create_iso_context.header_size > 4, followed by quadlets * from the packet payload if &fw_cdev_create_iso_context.header_size > 8. * * Format of 1394 iso packet header: 16 bits data_length, 2 bits tag, 6 bits * channel, 4 bits tcode, 4 bits sy, in big endian byte order. * data_length is the actual received size of the packet without the four * 1394 iso packet header bytes. * * Format of timestamp: 16 bits invalid, 3 bits cycleSeconds, 13 bits * cycleCount, in big endian byte order. * * In version 1 of the ABI, no timestamp quadlet was inserted; instead, payload * data followed directly after the 1394 is header if header_size > 4. * Behaviour of ver. 1 of this ABI is no longer available since ABI ver. 2. */struct fw_cdev_event_iso_interrupt { __u64 closure; __u32 type; __u32 cycle; __u32 header_length; __u32 header[0];}; /** * struct fw_cdev_event_iso_interrupt_mc - An iso buffer chunk was completed * @closure: See &fw_cdev_event_common; * set by %FW_CDEV_CREATE_ISO_CONTEXT ioctl * @type: %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL * @completed: Offset into the receive buffer; data before this offset is valid * * This event is sent in multichannel contexts (context type * %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL) for &fw_cdev_iso_packet buffer * chunks that have been completely filled and that have the * %FW_CDEV_ISO_INTERRUPT bit set, or when explicitly requested with * %FW_CDEV_IOC_FLUSH_ISO. * * The buffer is continuously filled with the following data, per packet: * - the 1394 iso packet header as described at &fw_cdev_event_iso_interrupt, * but in little endian byte order, * - packet payload (as many bytes as specified in the data_length field of * the 1394 iso packet header) in big endian byte order, * - 0...3 padding bytes as needed to align the following trailer quadlet, * - trailer quadlet, containing the reception timestamp as described at * &fw_cdev_event_iso_interrupt, but in little endian byte order. * * Hence the per-packet size is data_length (rounded up to a multiple of 4) + 8. * When processing the data, stop before a packet that would cross the * @completed offset. * * A packet near the end of a buffer chunk will typically spill over into the * next queued buffer chunk. It is the responsibility of the client to check * for this condition, assemble a broken-up packet from its parts, and not to * re-queue any buffer chunks in which as yet unread packet parts reside. */struct fw_cdev_event_iso_interrupt_mc { __u64 closure; __u32 type; __u32 completed;}; /** * struct fw_cdev_event_iso_resource - Iso resources were allocated or freed * @closure: See &fw_cdev_event_common; * set by %FW_CDEV_IOC_(DE)ALLOCATE_ISO_RESOURCE(_ONCE) ioctl * @type: %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED or * %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED * @handle: Reference by which an allocated resource can be deallocated * @channel: Isochronous channel which was (de)allocated, if any * @bandwidth: Bandwidth allocation units which were (de)allocated, if any * * An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED event is sent after an isochronous * resource was allocated at the IRM. The client has to check @channel and * @bandwidth for whether the allocation actually succeeded. * * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event is sent after an isochronous * resource was deallocated at the IRM. It is also sent when automatic * reallocation after a bus reset failed. * * @channel is <0 if no channel was (de)allocated or if reallocation failed. * @bandwidth is 0 if no bandwidth was (de)allocated or if reallocation failed. */struct fw_cdev_event_iso_resource { __u64 closure; __u32 type; __u32 handle; __s32 channel; __s32 bandwidth;}; /** * struct fw_cdev_event_phy_packet - A PHY packet was transmitted or received * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_SEND_PHY_PACKET * or %FW_CDEV_IOC_RECEIVE_PHY_PACKETS ioctl * @type: %FW_CDEV_EVENT_PHY_PACKET_SENT or %..._RECEIVED * @rcode: %RCODE_..., indicates success or failure of transmission * @length: Data length in bytes * @data: Incoming data * * If @type is %FW_CDEV_EVENT_PHY_PACKET_SENT, @length is 0 and @data empty, * except in case of a ping packet: Then, @length is 4, and @data[0] is the * ping time in 49.152MHz clocks if @rcode is %RCODE_COMPLETE. * * If @type is %FW_CDEV_EVENT_PHY_PACKET_RECEIVED, @length is 8 and @data * consists of the two PHY packet quadlets, in host byte order. */struct fw_cdev_event_phy_packet { __u64 closure; __u32 type; __u32 rcode; __u32 length; __u32 data[0];}; /** * union fw_cdev_event - Convenience union of fw_cdev_event_ types * @common: Valid for all types * @bus_reset: Valid if @common.type == %FW_CDEV_EVENT_BUS_RESET * @response: Valid if @common.type == %FW_CDEV_EVENT_RESPONSE * @request: Valid if @common.type == %FW_CDEV_EVENT_REQUEST * @request2: Valid if @common.type == %FW_CDEV_EVENT_REQUEST2 * @iso_interrupt: Valid if @common.type == %FW_CDEV_EVENT_ISO_INTERRUPT * @iso_interrupt_mc: Valid if @common.type == * %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL * @iso_resource: Valid if @common.type == * %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED or * %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED * @phy_packet: Valid if @common.type == * %FW_CDEV_EVENT_PHY_PACKET_SENT or * %FW_CDEV_EVENT_PHY_PACKET_RECEIVED * * Convenience union for userspace use. Events could be read(2) into an * appropriately aligned char buffer and then cast to this union for further * processing. Note that for a request, response or iso_interrupt event, * the data[] or header[] may make the size of the full event larger than * sizeof(union fw_cdev_event). Also note that if you attempt to read(2) * an event into a buffer that is not large enough for it, the data that does * not fit will be discarded so that the next read(2) will return a new event. */union fw_cdev_event { struct fw_cdev_event_common common; struct fw_cdev_event_bus_reset bus_reset; struct fw_cdev_event_response response; struct fw_cdev_event_request request; struct fw_cdev_event_request2 request2; /* added in 2.6.36 */ struct fw_cdev_event_iso_interrupt iso_interrupt; struct fw_cdev_event_iso_interrupt_mc iso_interrupt_mc; /* added in 2.6.36 */ struct fw_cdev_event_iso_resource iso_resource; /* added in 2.6.30 */ struct fw_cdev_event_phy_packet phy_packet; /* added in 2.6.36 */}; /* available since kernel version 2.6.22 */#define FW_CDEV_IOC_GET_INFO _IOWR('#', 0x00, struct fw_cdev_get_info)#define FW_CDEV_IOC_SEND_REQUEST _IOW('#', 0x01, struct fw_cdev_send_request)#define FW_CDEV_IOC_ALLOCATE _IOWR('#', 0x02, struct fw_cdev_allocate)#define FW_CDEV_IOC_DEALLOCATE _IOW('#', 0x03, struct fw_cdev_deallocate)#define FW_CDEV_IOC_SEND_RESPONSE _IOW('#', 0x04, struct fw_cdev_send_response)#define FW_CDEV_IOC_INITIATE_BUS_RESET _IOW('#', 0x05, struct fw_cdev_initiate_bus_reset)#define FW_CDEV_IOC_ADD_DESCRIPTOR _IOWR('#', 0x06, struct fw_cdev_add_descriptor)#define FW_CDEV_IOC_REMOVE_DESCRIPTOR _IOW('#', 0x07, struct fw_cdev_remove_descriptor)#define FW_CDEV_IOC_CREATE_ISO_CONTEXT _IOWR('#', 0x08, struct fw_cdev_create_iso_context)#define FW_CDEV_IOC_QUEUE_ISO _IOWR('#', 0x09, struct fw_cdev_queue_iso)#define FW_CDEV_IOC_START_ISO _IOW('#', 0x0a, struct fw_cdev_start_iso)#define FW_CDEV_IOC_STOP_ISO _IOW('#', 0x0b, struct fw_cdev_stop_iso) /* available since kernel version 2.6.24 */#define FW_CDEV_IOC_GET_CYCLE_TIMER _IOR('#', 0x0c, struct fw_cdev_get_cycle_timer) /* available since kernel version 2.6.30 */#define FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE _IOWR('#', 0x0d, struct fw_cdev_allocate_iso_resource)#define FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE _IOW('#', 0x0e, struct fw_cdev_deallocate)#define FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE _IOW('#', 0x0f, struct fw_cdev_allocate_iso_resource)#define FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE_ONCE _IOW('#', 0x10, struct fw_cdev_allocate_iso_resource)#define FW_CDEV_IOC_GET_SPEED _IO('#', 0x11) /* returns speed code */#define FW_CDEV_IOC_SEND_BROADCAST_REQUEST _IOW('#', 0x12, struct fw_cdev_send_request)#define FW_CDEV_IOC_SEND_STREAM_PACKET _IOW('#', 0x13, struct fw_cdev_send_stream_packet) /* available since kernel version 2.6.34 */#define FW_CDEV_IOC_GET_CYCLE_TIMER2 _IOWR('#', 0x14, struct fw_cdev_get_cycle_timer2) /* available since kernel version 2.6.36 */#define FW_CDEV_IOC_SEND_PHY_PACKET _IOWR('#', 0x15, struct fw_cdev_send_phy_packet)#define FW_CDEV_IOC_RECEIVE_PHY_PACKETS _IOW('#', 0x16, struct fw_cdev_receive_phy_packets)#define FW_CDEV_IOC_SET_ISO_CHANNELS _IOW('#', 0x17, struct fw_cdev_set_iso_channels) /* available since kernel version 3.4 */#define FW_CDEV_IOC_FLUSH_ISO _IOW('#', 0x18, struct fw_cdev_flush_iso) /* * ABI version history * 1 (2.6.22) - initial version * (2.6.24) - added %FW_CDEV_IOC_GET_CYCLE_TIMER * 2 (2.6.30) - changed &fw_cdev_event_iso_interrupt.header if * &fw_cdev_create_iso_context.header_size is 8 or more * - added %FW_CDEV_IOC_*_ISO_RESOURCE*, * %FW_CDEV_IOC_GET_SPEED, %FW_CDEV_IOC_SEND_BROADCAST_REQUEST, * %FW_CDEV_IOC_SEND_STREAM_PACKET * (2.6.32) - added time stamp to xmit &fw_cdev_event_iso_interrupt * (2.6.33) - IR has always packet-per-buffer semantics now, not one of * dual-buffer or packet-per-buffer depending on hardware * - shared use and auto-response for FCP registers * 3 (2.6.34) - made &fw_cdev_get_cycle_timer reliable * - added %FW_CDEV_IOC_GET_CYCLE_TIMER2 * 4 (2.6.36) - added %FW_CDEV_EVENT_REQUEST2, %FW_CDEV_EVENT_PHY_PACKET_*, * and &fw_cdev_allocate.region_end * - implemented &fw_cdev_event_bus_reset.bm_node_id * - added %FW_CDEV_IOC_SEND_PHY_PACKET, _RECEIVE_PHY_PACKETS * - added %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL, * %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL, and * %FW_CDEV_IOC_SET_ISO_CHANNELS * 5 (3.4) - send %FW_CDEV_EVENT_ISO_INTERRUPT events when needed to * avoid dropping data * - added %FW_CDEV_IOC_FLUSH_ISO */ /** * struct fw_cdev_get_info - General purpose information ioctl * @version: The version field is just a running serial number. Both an * input parameter (ABI version implemented by the client) and * output parameter (ABI version implemented by the kernel). * A client shall fill in the ABI @version for which the client * was implemented. This is necessary for forward compatibility. * @rom_length: If @rom is non-zero, up to @rom_length bytes of Configuration * ROM will be copied into that user space address. In either * case, @rom_length is updated with the actual length of the * Configuration ROM. * @rom: If non-zero, address of a buffer to be filled by a copy of the * device's Configuration ROM * @bus_reset: If non-zero, address of a buffer to be filled by a * &struct fw_cdev_event_bus_reset with the current state * of the bus. This does not cause a bus reset to happen. * @bus_reset_closure: Value of &closure in this and subsequent bus reset events * @card: The index of the card this device belongs to * * The %FW_CDEV_IOC_GET_INFO ioctl is usually the very first one which a client * performs right after it opened a /dev/fw* file. * * As a side effect, reception of %FW_CDEV_EVENT_BUS_RESET events to be read(2) * is started by this ioctl. */struct fw_cdev_get_info { __u32 version; __u32 rom_length; __u64 rom; __u64 bus_reset; __u64 bus_reset_closure; __u32 card;}; /** * struct fw_cdev_send_request - Send an asynchronous request packet * @tcode: Transaction code of the request * @length: Length of outgoing payload, in bytes * @offset: 48-bit offset at destination node * @closure: Passed back to userspace in the response event * @data: Userspace pointer to payload * @generation: The bus generation where packet is valid * * Send a request to the device. This ioctl implements all outgoing requests. * Both quadlet and block request specify the payload as a pointer to the dataLines 1–500 of 1039. Load more
/* * Char device interface. * * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ #ifndef _LINUX_FIREWIRE_CDEV_H #define _LINUX_FIREWIRE_CDEV_H #include <linux/ioctl.h> #include <linux/types.h> #include <linux/firewire-constants.h> /* available since kernel version 2.6.22 */ #define FW_CDEV_EVENT_BUS_RESET 0x00 #define FW_CDEV_EVENT_RESPONSE 0x01 #define FW_CDEV_EVENT_REQUEST 0x02 #define FW_CDEV_EVENT_ISO_INTERRUPT 0x03 /* available since kernel version 2.6.30 */ #define FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED 0x04 #define FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED 0x05 /* available since kernel version 2.6.36 */ #define FW_CDEV_EVENT_REQUEST2 0x06 #define FW_CDEV_EVENT_PHY_PACKET_SENT 0x07 #define FW_CDEV_EVENT_PHY_PACKET_RECEIVED 0x08 #define FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL 0x09 /** * struct fw_cdev_event_common - Common part of all fw_cdev_event_ types * @closure: For arbitrary use by userspace * @type: Discriminates the fw_cdev_event_ types * * This struct may be used to access generic members of all fw_cdev_event_ * types regardless of the specific type. * * Data passed in the @closure field for a request will be returned in the * corresponding event. It is big enough to hold a pointer on all platforms. * The ioctl used to set @closure depends on the @type of event. */ struct fw_cdev_event_common { __u64 closure; __u32 type; }; /** * struct fw_cdev_event_bus_reset - Sent when a bus reset occurred * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_GET_INFO ioctl * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_BUS_RESET * @node_id: New node ID of this node * @local_node_id: Node ID of the local node, i.e. of the controller * @bm_node_id: Node ID of the bus manager * @irm_node_id: Node ID of the iso resource manager * @root_node_id: Node ID of the root node * @generation: New bus generation * * This event is sent when the bus the device belongs to goes through a bus * reset. It provides information about the new bus configuration, such as * new node ID for this device, new root ID, and others. * * If @bm_node_id is 0xffff right after bus reset it can be reread by an * %FW_CDEV_IOC_GET_INFO ioctl after bus manager selection was finished. * Kernels with ABI version < 4 do not set @bm_node_id. */ struct fw_cdev_event_bus_reset { __u64 closure; __u32 type; __u32 node_id; __u32 local_node_id; __u32 bm_node_id; __u32 irm_node_id; __u32 root_node_id; __u32 generation; }; /** * struct fw_cdev_event_response - Sent when a response packet was received * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_SEND_REQUEST * or %FW_CDEV_IOC_SEND_BROADCAST_REQUEST * or %FW_CDEV_IOC_SEND_STREAM_PACKET ioctl * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_RESPONSE * @rcode: Response code returned by the remote node * @length: Data length, i.e. the response's payload size in bytes * @data: Payload data, if any * * This event is sent when the stack receives a response to an outgoing request * sent by %FW_CDEV_IOC_SEND_REQUEST ioctl. The payload data for responses * carrying data (read and lock responses) follows immediately and can be * accessed through the @data field. * * The event is also generated after conclusions of transactions that do not * involve response packets. This includes unified write transactions, * broadcast write transactions, and transmission of asynchronous stream * packets. @rcode indicates success or failure of such transmissions. */ struct fw_cdev_event_response { __u64 closure; __u32 type; __u32 rcode; __u32 length; __u32 data[0]; }; /** * struct fw_cdev_event_request - Old version of &fw_cdev_event_request2 * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_REQUEST * * This event is sent instead of &fw_cdev_event_request2 if the kernel or * the client implements ABI version <= 3. &fw_cdev_event_request lacks * essential information; use &fw_cdev_event_request2 instead. */ struct fw_cdev_event_request { __u64 closure; __u32 type; __u32 tcode; __u64 offset; __u32 handle; __u32 length; __u32 data[0]; }; /** * struct fw_cdev_event_request2 - Sent on incoming request to an address region * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_ALLOCATE ioctl * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_REQUEST2 * @tcode: Transaction code of the incoming request * @offset: The offset into the 48-bit per-node address space * @source_node_id: Sender node ID * @destination_node_id: Destination node ID * @card: The index of the card from which the request came * @generation: Bus generation in which the request is valid * @handle: Reference to the kernel-side pending request * @length: Data length, i.e. the request's payload size in bytes * @data: Incoming data, if any * * This event is sent when the stack receives an incoming request to an address * region registered using the %FW_CDEV_IOC_ALLOCATE ioctl. The request is * guaranteed to be completely contained in the specified region. Userspace is * responsible for sending the response by %FW_CDEV_IOC_SEND_RESPONSE ioctl, * using the same @handle. * * The payload data for requests carrying data (write and lock requests) * follows immediately and can be accessed through the @data field. * * Unlike &fw_cdev_event_request, @tcode of lock requests is one of the * firewire-core specific %TCODE_LOCK_MASK_SWAP...%TCODE_LOCK_VENDOR_DEPENDENT, * i.e. encodes the extended transaction code. * * @card may differ from &fw_cdev_get_info.card because requests are received * from all cards of the Linux host. @source_node_id, @destination_node_id, and * @generation pertain to that card. Destination node ID and bus generation may * therefore differ from the corresponding fields of the last * &fw_cdev_event_bus_reset. * * @destination_node_id may also differ from the current node ID because of a * non-local bus ID part or in case of a broadcast write request. Note, a * client must call an %FW_CDEV_IOC_SEND_RESPONSE ioctl even in case of a * broadcast write request; the kernel will then release the kernel-side pending * request but will not actually send a response packet. * * In case of a write request to FCP_REQUEST or FCP_RESPONSE, the kernel already * sent a write response immediately after the request was received; in this * case the client must still call an %FW_CDEV_IOC_SEND_RESPONSE ioctl to * release the kernel-side pending request, though another response won't be * sent. * * If the client subsequently needs to initiate requests to the sender node of * an &fw_cdev_event_request2, it needs to use a device file with matching * card index, node ID, and generation for outbound requests. */ struct fw_cdev_event_request2 { __u64 closure; __u32 type; __u32 tcode; __u64 offset; __u32 source_node_id; __u32 destination_node_id; __u32 card; __u32 generation; __u32 handle; __u32 length; __u32 data[0]; }; /** * struct fw_cdev_event_iso_interrupt - Sent when an iso packet was completed * @closure: See &fw_cdev_event_common; * set by %FW_CDEV_CREATE_ISO_CONTEXT ioctl * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_ISO_INTERRUPT * @cycle: Cycle counter of the last completed packet * @header_length: Total length of following headers, in bytes * @header: Stripped headers, if any * * This event is sent when the controller has completed an &fw_cdev_iso_packet * with the %FW_CDEV_ISO_INTERRUPT bit set, when explicitly requested with * %FW_CDEV_IOC_FLUSH_ISO, or when there have been so many completed packets * without the interrupt bit set that the kernel's internal buffer for @header * is about to overflow. (In the last case, ABI versions < 5 drop header data * up to the next interrupt packet.) * * Isochronous transmit events (context type %FW_CDEV_ISO_CONTEXT_TRANSMIT): * * In version 3 and some implementations of version 2 of the ABI, &header_length * is a multiple of 4 and &header contains timestamps of all packets up until * the interrupt packet. The format of the timestamps is as described below for * isochronous reception. In version 1 of the ABI, &header_length was 0. * * Isochronous receive events (context type %FW_CDEV_ISO_CONTEXT_RECEIVE): * * The headers stripped of all packets up until and including the interrupt * packet are returned in the @header field. The amount of header data per * packet is as specified at iso context creation by * &fw_cdev_create_iso_context.header_size. * * Hence, _interrupt.header_length / _context.header_size is the number of * packets received in this interrupt event. The client can now iterate * through the mmap()'ed DMA buffer according to this number of packets and * to the buffer sizes as the client specified in &fw_cdev_queue_iso. * * Since version 2 of this ABI, the portion for each packet in _interrupt.header * consists of the 1394 isochronous packet header, followed by a timestamp * quadlet if &fw_cdev_create_iso_context.header_size > 4, followed by quadlets * from the packet payload if &fw_cdev_create_iso_context.header_size > 8. * * Format of 1394 iso packet header: 16 bits data_length, 2 bits tag, 6 bits * channel, 4 bits tcode, 4 bits sy, in big endian byte order. * data_length is the actual received size of the packet without the four * 1394 iso packet header bytes. * * Format of timestamp: 16 bits invalid, 3 bits cycleSeconds, 13 bits * cycleCount, in big endian byte order. * * In version 1 of the ABI, no timestamp quadlet was inserted; instead, payload * data followed directly after the 1394 is header if header_size > 4. * Behaviour of ver. 1 of this ABI is no longer available since ABI ver. 2. */ struct fw_cdev_event_iso_interrupt { __u64 closure; __u32 type; __u32 cycle; __u32 header_length; __u32 header[0]; }; /** * struct fw_cdev_event_iso_interrupt_mc - An iso buffer chunk was completed * @closure: See &fw_cdev_event_common; * set by %FW_CDEV_CREATE_ISO_CONTEXT ioctl * @type: %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL * @completed: Offset into the receive buffer; data before this offset is valid * * This event is sent in multichannel contexts (context type * %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL) for &fw_cdev_iso_packet buffer * chunks that have been completely filled and that have the * %FW_CDEV_ISO_INTERRUPT bit set, or when explicitly requested with * %FW_CDEV_IOC_FLUSH_ISO. * * The buffer is continuously filled with the following data, per packet: * - the 1394 iso packet header as described at &fw_cdev_event_iso_interrupt, * but in little endian byte order, * - packet payload (as many bytes as specified in the data_length field of * the 1394 iso packet header) in big endian byte order, * - 0...3 padding bytes as needed to align the following trailer quadlet, * - trailer quadlet, containing the reception timestamp as described at * &fw_cdev_event_iso_interrupt, but in little endian byte order. * * Hence the per-packet size is data_length (rounded up to a multiple of 4) + 8. * When processing the data, stop before a packet that would cross the * @completed offset. * * A packet near the end of a buffer chunk will typically spill over into the * next queued buffer chunk. It is the responsibility of the client to check * for this condition, assemble a broken-up packet from its parts, and not to * re-queue any buffer chunks in which as yet unread packet parts reside. */ struct fw_cdev_event_iso_interrupt_mc { __u64 closure; __u32 type; __u32 completed; }; /** * struct fw_cdev_event_iso_resource - Iso resources were allocated or freed * @closure: See &fw_cdev_event_common; * set by %FW_CDEV_IOC_(DE)ALLOCATE_ISO_RESOURCE(_ONCE) ioctl * @type: %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED or * %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED * @handle: Reference by which an allocated resource can be deallocated * @channel: Isochronous channel which was (de)allocated, if any * @bandwidth: Bandwidth allocation units which were (de)allocated, if any * * An %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED event is sent after an isochronous * resource was allocated at the IRM. The client has to check @channel and * @bandwidth for whether the allocation actually succeeded. * * An %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED event is sent after an isochronous * resource was deallocated at the IRM. It is also sent when automatic * reallocation after a bus reset failed. * * @channel is <0 if no channel was (de)allocated or if reallocation failed. * @bandwidth is 0 if no bandwidth was (de)allocated or if reallocation failed. */ struct fw_cdev_event_iso_resource { __u64 closure; __u32 type; __u32 handle; __s32 channel; __s32 bandwidth; }; /** * struct fw_cdev_event_phy_packet - A PHY packet was transmitted or received * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_SEND_PHY_PACKET * or %FW_CDEV_IOC_RECEIVE_PHY_PACKETS ioctl * @type: %FW_CDEV_EVENT_PHY_PACKET_SENT or %..._RECEIVED * @rcode: %RCODE_..., indicates success or failure of transmission * @length: Data length in bytes * @data: Incoming data * * If @type is %FW_CDEV_EVENT_PHY_PACKET_SENT, @length is 0 and @data empty, * except in case of a ping packet: Then, @length is 4, and @data[0] is the * ping time in 49.152MHz clocks if @rcode is %RCODE_COMPLETE. * * If @type is %FW_CDEV_EVENT_PHY_PACKET_RECEIVED, @length is 8 and @data * consists of the two PHY packet quadlets, in host byte order. */ struct fw_cdev_event_phy_packet { __u64 closure; __u32 type; __u32 rcode; __u32 length; __u32 data[0]; }; /** * union fw_cdev_event - Convenience union of fw_cdev_event_ types * @common: Valid for all types * @bus_reset: Valid if @common.type == %FW_CDEV_EVENT_BUS_RESET * @response: Valid if @common.type == %FW_CDEV_EVENT_RESPONSE * @request: Valid if @common.type == %FW_CDEV_EVENT_REQUEST * @request2: Valid if @common.type == %FW_CDEV_EVENT_REQUEST2 * @iso_interrupt: Valid if @common.type == %FW_CDEV_EVENT_ISO_INTERRUPT * @iso_interrupt_mc: Valid if @common.type == * %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL * @iso_resource: Valid if @common.type == * %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED or * %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED * @phy_packet: Valid if @common.type == * %FW_CDEV_EVENT_PHY_PACKET_SENT or * %FW_CDEV_EVENT_PHY_PACKET_RECEIVED * * Convenience union for userspace use. Events could be read(2) into an * appropriately aligned char buffer and then cast to this union for further * processing. Note that for a request, response or iso_interrupt event, * the data[] or header[] may make the size of the full event larger than * sizeof(union fw_cdev_event). Also note that if you attempt to read(2) * an event into a buffer that is not large enough for it, the data that does * not fit will be discarded so that the next read(2) will return a new event. */ union fw_cdev_event { struct fw_cdev_event_common common; struct fw_cdev_event_bus_reset bus_reset; struct fw_cdev_event_response response; struct fw_cdev_event_request request; struct fw_cdev_event_request2 request2; /* added in 2.6.36 */ struct fw_cdev_event_iso_interrupt iso_interrupt; struct fw_cdev_event_iso_interrupt_mc iso_interrupt_mc; /* added in 2.6.36 */ struct fw_cdev_event_iso_resource iso_resource; /* added in 2.6.30 */ struct fw_cdev_event_phy_packet phy_packet; /* added in 2.6.36 */ }; /* available since kernel version 2.6.22 */ #define FW_CDEV_IOC_GET_INFO _IOWR('#', 0x00, struct fw_cdev_get_info) #define FW_CDEV_IOC_SEND_REQUEST _IOW('#', 0x01, struct fw_cdev_send_request) #define FW_CDEV_IOC_ALLOCATE _IOWR('#', 0x02, struct fw_cdev_allocate) #define FW_CDEV_IOC_DEALLOCATE _IOW('#', 0x03, struct fw_cdev_deallocate) #define FW_CDEV_IOC_SEND_RESPONSE _IOW('#', 0x04, struct fw_cdev_send_response) #define FW_CDEV_IOC_INITIATE_BUS_RESET _IOW('#', 0x05, struct fw_cdev_initiate_bus_reset) #define FW_CDEV_IOC_ADD_DESCRIPTOR _IOWR('#', 0x06, struct fw_cdev_add_descriptor) #define FW_CDEV_IOC_REMOVE_DESCRIPTOR _IOW('#', 0x07, struct fw_cdev_remove_descriptor) #define FW_CDEV_IOC_CREATE_ISO_CONTEXT _IOWR('#', 0x08, struct fw_cdev_create_iso_context) #define FW_CDEV_IOC_QUEUE_ISO _IOWR('#', 0x09, struct fw_cdev_queue_iso) #define FW_CDEV_IOC_START_ISO _IOW('#', 0x0a, struct fw_cdev_start_iso) #define FW_CDEV_IOC_STOP_ISO _IOW('#', 0x0b, struct fw_cdev_stop_iso) /* available since kernel version 2.6.24 */ #define FW_CDEV_IOC_GET_CYCLE_TIMER _IOR('#', 0x0c, struct fw_cdev_get_cycle_timer) /* available since kernel version 2.6.30 */ #define FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE _IOWR('#', 0x0d, struct fw_cdev_allocate_iso_resource) #define FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE _IOW('#', 0x0e, struct fw_cdev_deallocate) #define FW_CDEV_IOC_ALLOCATE_ISO_RESOURCE_ONCE _IOW('#', 0x0f, struct fw_cdev_allocate_iso_resource) #define FW_CDEV_IOC_DEALLOCATE_ISO_RESOURCE_ONCE _IOW('#', 0x10, struct fw_cdev_allocate_iso_resource) #define FW_CDEV_IOC_GET_SPEED _IO('#', 0x11) /* returns speed code */ #define FW_CDEV_IOC_SEND_BROADCAST_REQUEST _IOW('#', 0x12, struct fw_cdev_send_request) #define FW_CDEV_IOC_SEND_STREAM_PACKET _IOW('#', 0x13, struct fw_cdev_send_stream_packet) /* available since kernel version 2.6.34 */ #define FW_CDEV_IOC_GET_CYCLE_TIMER2 _IOWR('#', 0x14, struct fw_cdev_get_cycle_timer2) /* available since kernel version 2.6.36 */ #define FW_CDEV_IOC_SEND_PHY_PACKET _IOWR('#', 0x15, struct fw_cdev_send_phy_packet) #define FW_CDEV_IOC_RECEIVE_PHY_PACKETS _IOW('#', 0x16, struct fw_cdev_receive_phy_packets) #define FW_CDEV_IOC_SET_ISO_CHANNELS _IOW('#', 0x17, struct fw_cdev_set_iso_channels) /* available since kernel version 3.4 */ #define FW_CDEV_IOC_FLUSH_ISO _IOW('#', 0x18, struct fw_cdev_flush_iso) /* * ABI version history * 1 (2.6.22) - initial version * (2.6.24) - added %FW_CDEV_IOC_GET_CYCLE_TIMER * 2 (2.6.30) - changed &fw_cdev_event_iso_interrupt.header if * &fw_cdev_create_iso_context.header_size is 8 or more * - added %FW_CDEV_IOC_*_ISO_RESOURCE*, * %FW_CDEV_IOC_GET_SPEED, %FW_CDEV_IOC_SEND_BROADCAST_REQUEST, * %FW_CDEV_IOC_SEND_STREAM_PACKET * (2.6.32) - added time stamp to xmit &fw_cdev_event_iso_interrupt * (2.6.33) - IR has always packet-per-buffer semantics now, not one of * dual-buffer or packet-per-buffer depending on hardware * - shared use and auto-response for FCP registers * 3 (2.6.34) - made &fw_cdev_get_cycle_timer reliable * - added %FW_CDEV_IOC_GET_CYCLE_TIMER2 * 4 (2.6.36) - added %FW_CDEV_EVENT_REQUEST2, %FW_CDEV_EVENT_PHY_PACKET_*, * and &fw_cdev_allocate.region_end * - implemented &fw_cdev_event_bus_reset.bm_node_id * - added %FW_CDEV_IOC_SEND_PHY_PACKET, _RECEIVE_PHY_PACKETS * - added %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL, * %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL, and * %FW_CDEV_IOC_SET_ISO_CHANNELS * 5 (3.4) - send %FW_CDEV_EVENT_ISO_INTERRUPT events when needed to * avoid dropping data * - added %FW_CDEV_IOC_FLUSH_ISO */ /** * struct fw_cdev_get_info - General purpose information ioctl * @version: The version field is just a running serial number. Both an * input parameter (ABI version implemented by the client) and * output parameter (ABI version implemented by the kernel). * A client shall fill in the ABI @version for which the client * was implemented. This is necessary for forward compatibility. * @rom_length: If @rom is non-zero, up to @rom_length bytes of Configuration * ROM will be copied into that user space address. In either * case, @rom_length is updated with the actual length of the * Configuration ROM. * @rom: If non-zero, address of a buffer to be filled by a copy of the * device's Configuration ROM * @bus_reset: If non-zero, address of a buffer to be filled by a * &struct fw_cdev_event_bus_reset with the current state * of the bus. This does not cause a bus reset to happen. * @bus_reset_closure: Value of &closure in this and subsequent bus reset events * @card: The index of the card this device belongs to * * The %FW_CDEV_IOC_GET_INFO ioctl is usually the very first one which a client * performs right after it opened a /dev/fw* file. * * As a side effect, reception of %FW_CDEV_EVENT_BUS_RESET events to be read(2) * is started by this ioctl. */ struct fw_cdev_get_info { __u32 version; __u32 rom_length; __u64 rom; __u64 bus_reset; __u64 bus_reset_closure; __u32 card; }; /** * struct fw_cdev_send_request - Send an asynchronous request packet * @tcode: Transaction code of the request * @length: Length of outgoing payload, in bytes * @offset: 48-bit offset at destination node * @closure: Passed back to userspace in the response event * @data: Userspace pointer to payload * @generation: The bus generation where packet is valid * * Send a request to the device. This ioctl implements all outgoing requests. * Both quadlet and block request specify the payload as a pointer to the data