diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/firewire.h | 82 | ||||
| -rw-r--r-- | include/uapi/linux/firewire-cdev.h | 178 |
2 files changed, 233 insertions, 27 deletions
diff --git a/include/linux/firewire.h b/include/linux/firewire.h index efb6e2cf2034..bd3fc75d4f14 100644 --- a/include/linux/firewire.h +++ b/include/linux/firewire.h @@ -261,6 +261,15 @@ typedef void (*fw_packet_callback_t)(struct fw_packet *packet, typedef void (*fw_transaction_callback_t)(struct fw_card *card, int rcode, void *data, size_t length, void *callback_data); +typedef void (*fw_transaction_callback_with_tstamp_t)(struct fw_card *card, int rcode, + u32 request_tstamp, u32 response_tstamp, void *data, + size_t length, void *callback_data); + +union fw_transaction_callback { + fw_transaction_callback_t without_tstamp; + fw_transaction_callback_with_tstamp_t with_tstamp; +}; + /* * This callback handles an inbound request subaction. It is called in * RCU read-side context, therefore must not sleep. @@ -312,6 +321,7 @@ struct fw_transaction { struct fw_card *card; bool is_split_transaction; struct timer_list split_timeout_timer; + u32 split_timeout_cycle; struct fw_packet packet; @@ -319,7 +329,8 @@ struct fw_transaction { * The data passed to the callback is valid only during the * callback. */ - fw_transaction_callback_t callback; + union fw_transaction_callback callback; + bool with_tstamp; void *callback_data; }; @@ -345,10 +356,71 @@ void fw_send_response(struct fw_card *card, struct fw_request *request, int rcode); int fw_get_request_speed(struct fw_request *request); u32 fw_request_get_timestamp(const struct fw_request *request); -void fw_send_request(struct fw_card *card, struct fw_transaction *t, - int tcode, int destination_id, int generation, int speed, - unsigned long long offset, void *payload, size_t length, - fw_transaction_callback_t callback, void *callback_data); + +void __fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode, + int destination_id, int generation, int speed, unsigned long long offset, + void *payload, size_t length, union fw_transaction_callback callback, + bool with_tstamp, void *callback_data); + +/** + * fw_send_request() - submit a request packet for transmission to generate callback for response + * subaction without time stamp. + * @card: interface to send the request at + * @t: transaction instance to which the request belongs + * @tcode: transaction code + * @destination_id: destination node ID, consisting of bus_ID and phy_ID + * @generation: bus generation in which request and response are valid + * @speed: transmission speed + * @offset: 48bit wide offset into destination's address space + * @payload: data payload for the request subaction + * @length: length of the payload, in bytes + * @callback: function to be called when the transaction is completed + * @callback_data: data to be passed to the transaction completion callback + * + * A variation of __fw_send_request() to generate callback for response subaction without time + * stamp. + */ +static inline void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode, + int destination_id, int generation, int speed, + unsigned long long offset, void *payload, size_t length, + fw_transaction_callback_t callback, void *callback_data) +{ + union fw_transaction_callback cb = { + .without_tstamp = callback, + }; + __fw_send_request(card, t, tcode, destination_id, generation, speed, offset, payload, + length, cb, false, callback_data); +} + +/** + * fw_send_request_with_tstamp() - submit a request packet for transmission to generate callback for + * response with time stamp. + * @card: interface to send the request at + * @t: transaction instance to which the request belongs + * @tcode: transaction code + * @destination_id: destination node ID, consisting of bus_ID and phy_ID + * @generation: bus generation in which request and response are valid + * @speed: transmission speed + * @offset: 48bit wide offset into destination's address space + * @payload: data payload for the request subaction + * @length: length of the payload, in bytes + * @callback: function to be called when the transaction is completed + * @callback_data: data to be passed to the transaction completion callback + * + * A variation of __fw_send_request() to generate callback for response subaction with time stamp. + */ +static inline void fw_send_request_with_tstamp(struct fw_card *card, struct fw_transaction *t, + int tcode, int destination_id, int generation, int speed, unsigned long long offset, + void *payload, size_t length, fw_transaction_callback_with_tstamp_t callback, + void *callback_data) +{ + union fw_transaction_callback cb = { + .with_tstamp = callback, + }; + __fw_send_request(card, t, tcode, destination_id, generation, speed, offset, payload, + length, cb, true, callback_data); +} + int fw_cancel_transaction(struct fw_card *card, struct fw_transaction *transaction); int fw_run_transaction(struct fw_card *card, int tcode, int destination_id, diff --git a/include/uapi/linux/firewire-cdev.h b/include/uapi/linux/firewire-cdev.h index 92be3ea3c6e0..1f2c9469f921 100644 --- a/include/uapi/linux/firewire-cdev.h +++ b/include/uapi/linux/firewire-cdev.h @@ -46,6 +46,12 @@ #define FW_CDEV_EVENT_PHY_PACKET_RECEIVED 0x08 #define FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL 0x09 +/* available since kernel version 6.5 */ +#define FW_CDEV_EVENT_REQUEST3 0x0a +#define FW_CDEV_EVENT_RESPONSE2 0x0b +#define FW_CDEV_EVENT_PHY_PACKET_SENT2 0x0c +#define FW_CDEV_EVENT_PHY_PACKET_RECEIVED2 0x0d + /** * struct fw_cdev_event_common - Common part of all fw_cdev_event_* types * @closure: For arbitrary use by userspace @@ -103,6 +109,32 @@ struct fw_cdev_event_bus_reset { * @length: Data length, i.e. the response's payload size in bytes * @data: Payload data, if any * + * This event is sent instead of &fw_cdev_event_response if the kernel or the client implements + * ABI version <= 5. It has the lack of time stamp field comparing to &fw_cdev_event_response2. + */ +struct fw_cdev_event_response { + __u64 closure; + __u32 type; + __u32 rcode; + __u32 length; + __u32 data[]; +}; + +/** + * struct fw_cdev_event_response2 - 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 + * @request_tstamp: The time stamp of isochronous cycle at which the request was sent. + * @response_tstamp: The time stamp of isochronous cycle at which the response was sent. + * @padding: Padding to keep the size of structure as multiples of 8 in various architectures + * since 4 byte alignment is used for 8 byte of object type in System V ABI for i386 + * architecture. + * @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 @@ -112,12 +144,21 @@ struct fw_cdev_event_bus_reset { * 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. + * + * The value of @request_tstamp expresses the isochronous cycle at which the request was sent to + * initiate the transaction. The value of @response_tstamp expresses the isochronous cycle at which + * the response arrived to complete the transaction. Each value is unsigned 16 bit integer + * containing three low order bits of second field and all 13 bits of cycle field in format of + * CYCLE_TIMER register. */ -struct fw_cdev_event_response { +struct fw_cdev_event_response2 { __u64 closure; __u32 type; __u32 rcode; __u32 length; + __u32 request_tstamp; + __u32 response_tstamp; + __u32 padding; __u32 data[]; }; @@ -159,6 +200,41 @@ struct fw_cdev_event_request { * @length: Data length, i.e. the request's payload size in bytes * @data: Incoming data, if any * + * This event is sent instead of &fw_cdev_event_request3 if the kernel or the client implements + * ABI version <= 5. It has the lack of time stamp field comparing to &fw_cdev_event_request3. + */ +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[]; +}; + +/** + * struct fw_cdev_event_request3 - 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 + * @tstamp: The time stamp of isochronous cycle at which the request arrived. + * @padding: Padding to keep the size of structure as multiples of 8 in various architectures + * since 4 byte alignment is used for 8 byte of object type in System V ABI for i386 + * architecture. + * @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 @@ -191,10 +267,14 @@ struct fw_cdev_event_request { * 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 + * an &fw_cdev_event_request3, it needs to use a device file with matching * card index, node ID, and generation for outbound requests. + * + * @tstamp is isochronous cycle at which the request arrived. It is 16 bit integer value and the + * higher 3 bits expresses three low order bits of second field in the format of CYCLE_TIME + * register and the rest 13 bits expresses cycle field. */ -struct fw_cdev_event_request2 { +struct fw_cdev_event_request3 { __u64 closure; __u32 type; __u32 tcode; @@ -205,6 +285,8 @@ struct fw_cdev_event_request2 { __u32 generation; __u32 handle; __u32 length; + __u32 tstamp; + __u32 padding; __u32 data[]; }; @@ -341,20 +423,59 @@ struct fw_cdev_event_iso_resource { * @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 for %FW_CDEV_IOC_RECEIVE_PHY_PACKETS. For %FW_CDEV_IOC_SEND_PHY_PACKET + * the field has the same data in the request, thus the length of 8 bytes. + * + * This event is sent instead of &fw_cdev_event_phy_packet2 if the kernel or + * the client implements ABI version <= 5. It has the lack of time stamp field comparing to + * &fw_cdev_event_phy_packet2. + */ +struct fw_cdev_event_phy_packet { + __u64 closure; + __u32 type; + __u32 rcode; + __u32 length; + __u32 data[]; +}; + +/** + * struct fw_cdev_event_phy_packet2 - A PHY packet was transmitted or received with time stamp. + * @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_SENT2 or %FW_CDEV_EVENT_PHY_PACKET_RECEIVED2 + * @rcode: %RCODE_..., indicates success or failure of transmission + * @length: Data length in bytes + * @tstamp: For %FW_CDEV_EVENT_PHY_PACKET_RECEIVED2, the time stamp of isochronous cycle at + * which the packet arrived. For %FW_CDEV_EVENT_PHY_PACKET_SENT2 and non-ping packet, + * the time stamp of isochronous cycle at which the packet was sent. For ping packet, + * the tick count for round-trip time measured by 1394 OHCI controller. + * The time stamp of isochronous cycle at which either the response was sent for + * %FW_CDEV_EVENT_PHY_PACKET_SENT2 or the request arrived for + * %FW_CDEV_EVENT_PHY_PACKET_RECEIVED2. * @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_SENT2, @length is 8 and @data consists of the two PHY + * packet quadlets to be sent, in host byte order, * - * 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. + * If @type is %FW_CDEV_EVENT_PHY_PACKET_RECEIVED2, @length is 8 and @data consists of the two PHY + * packet quadlets, in host byte order. + * + * For %FW_CDEV_EVENT_PHY_PACKET_RECEIVED2, the @tstamp is the isochronous cycle at which the + * packet arrived. It is 16 bit integer value and the higher 3 bits expresses three low order bits + * of second field and the rest 13 bits expresses cycle field in the format of CYCLE_TIME register. + * + * For %FW_CDEV_EVENT_PHY_PACKET_SENT2, the @tstamp has different meanings whether to sent the + * packet for ping or not. If it's not for ping, the @tstamp is the isochronous cycle at which the + * packet was sent, and use the same format as the case of %FW_CDEV_EVENT_PHY_PACKET_SENT2. If it's + * for ping, the @tstamp is for round-trip time measured by 1394 OHCI controller with 42.195 MHz + * resolution. */ -struct fw_cdev_event_phy_packet { +struct fw_cdev_event_phy_packet2 { __u64 closure; __u32 type; __u32 rcode; __u32 length; + __u32 tstamp; __u32 data[]; }; @@ -375,6 +496,11 @@ struct fw_cdev_event_phy_packet { * %FW_CDEV_EVENT_PHY_PACKET_SENT or * %FW_CDEV_EVENT_PHY_PACKET_RECEIVED * + * @request3: Valid if @common.type == %FW_CDEV_EVENT_REQUEST3 + * @response2: Valid if @common.type == %FW_CDEV_EVENT_RESPONSE2 + * @phy_packet2: Valid if @common.type == %FW_CDEV_EVENT_PHY_PACKET_SENT2 or + * %FW_CDEV_EVENT_PHY_PACKET_RECEIVED2 + * * 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, @@ -393,6 +519,9 @@ union fw_cdev_event { 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 */ + struct fw_cdev_event_request3 request3; /* added in 6.5 */ + struct fw_cdev_event_response2 response2; /* added in 6.5 */ + struct fw_cdev_event_phy_packet2 phy_packet2; /* added in 6.5 */ }; /* available since kernel version 2.6.22 */ @@ -457,6 +586,11 @@ union fw_cdev_event { * 5 (3.4) - send %FW_CDEV_EVENT_ISO_INTERRUPT events when needed to * avoid dropping data * - added %FW_CDEV_IOC_FLUSH_ISO + * 6 (6.5) - added some event for subactions of asynchronous transaction with time stamp + * - %FW_CDEV_EVENT_REQUEST3 + * - %FW_CDEV_EVENT_RESPONSE2 + * - %FW_CDEV_EVENT_PHY_PACKET_SENT2 + * - %FW_CDEV_EVENT_PHY_PACKET_RECEIVED2 */ /** @@ -502,11 +636,11 @@ struct fw_cdev_get_info { * @data: Userspace pointer to payload * @generation: The bus generation where packet is valid * - * Send a request to the device. This ioctl implements all outgoing requests. - * Both quadlet and block request specify the payload as a pointer to the data - * in the @data field. Once the transaction completes, the kernel writes an - * &fw_cdev_event_response event back. The @closure field is passed back to - * user space in the response event. + * Send a request to the device. This ioctl implements all outgoing requests. Both quadlet and + * block request specify the payload as a pointer to the data in the @data field. Once the + * transaction completes, the kernel writes either &fw_cdev_event_response event or + * &fw_cdev_event_response event back. The @closure field is passed back to user space in the + * response event. */ struct fw_cdev_send_request { __u32 tcode; @@ -989,10 +1123,9 @@ struct fw_cdev_allocate_iso_resource { * @generation: The bus generation where packet is valid * @speed: Speed to transmit at * - * The %FW_CDEV_IOC_SEND_STREAM_PACKET ioctl sends an asynchronous stream packet - * to every device which is listening to the specified channel. The kernel - * writes an &fw_cdev_event_response event which indicates success or failure of - * the transmission. + * The %FW_CDEV_IOC_SEND_STREAM_PACKET ioctl sends an asynchronous stream packet to every device + * which is listening to the specified channel. The kernel writes either &fw_cdev_event_response + * event or &fw_cdev_event_response2 event which indicates success or failure of the transmission. */ struct fw_cdev_send_stream_packet { __u32 length; @@ -1011,8 +1144,8 @@ struct fw_cdev_send_stream_packet { * @data: First and second quadlet of the PHY packet * @generation: The bus generation where packet is valid * - * The %FW_CDEV_IOC_SEND_PHY_PACKET ioctl sends a PHY packet to all nodes - * on the same card as this device. After transmission, an + * The %FW_CDEV_IOC_SEND_PHY_PACKET ioctl sends a PHY packet to all nodes on the same card as this + * device. After transmission, either %FW_CDEV_EVENT_PHY_PACKET_SENT event or * %FW_CDEV_EVENT_PHY_PACKET_SENT event is generated. * * The payload @data\[\] shall be specified in host byte order. Usually, @@ -1031,8 +1164,9 @@ struct fw_cdev_send_phy_packet { * struct fw_cdev_receive_phy_packets - start reception of PHY packets * @closure: Passed back to userspace in phy packet events * - * This ioctl activates issuing of %FW_CDEV_EVENT_PHY_PACKET_RECEIVED due to - * incoming PHY packets from any node on the same bus as the device. + * This ioctl activates issuing of either %FW_CDEV_EVENT_PHY_PACKET_RECEIVED or + * %FW_CDEV_EVENT_PHY_PACKET_RECEIVED2 due to incoming PHY packets from any node on the same bus + * as the device. * * The ioctl is only permitted on device files which represent a local node. */ |