diff options
Diffstat (limited to 'include/linux/firewire.h')
| -rw-r--r-- | include/linux/firewire.h | 82 |
1 files changed, 77 insertions, 5 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, |