diff options
Diffstat (limited to 'include/linux/firewire.h')
| -rw-r--r-- | include/linux/firewire.h | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/include/linux/firewire.h b/include/linux/firewire.h index dd9f2d765e68..b632eec3ab52 100644 --- a/include/linux/firewire.h +++ b/include/linux/firewire.h @@ -134,6 +134,8 @@ struct fw_card { __be32 topology_map[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4]; __be32 maint_utility_register; + + struct workqueue_struct *isoc_wq; }; static inline struct fw_card *fw_card_get(struct fw_card *card) @@ -462,7 +464,7 @@ struct fw_iso_packet { /* rx: Sync bit, wait for matching sy */ u32 tag:2; /* tx: Tag in packet header */ u32 sy:4; /* tx: Sy in packet header */ - u32 header_length:8; /* Length of immediate header */ + u32 header_length:8; /* Size of immediate header */ u32 header[]; /* tx: Top of 1394 isoch. data_block */ }; @@ -509,6 +511,7 @@ union fw_iso_callback { struct fw_iso_context { struct fw_card *card; + struct work_struct work; int type; int channel; int speed; @@ -528,6 +531,25 @@ int fw_iso_context_queue(struct fw_iso_context *ctx, unsigned long payload); void fw_iso_context_queue_flush(struct fw_iso_context *ctx); int fw_iso_context_flush_completions(struct fw_iso_context *ctx); + +/** + * fw_iso_context_schedule_flush_completions() - schedule work item to process isochronous context. + * @ctx: the isochronous context + * + * Schedule a work item on workqueue to process the isochronous context. The registered callback + * function is called by the worker when a queued packet buffer with the interrupt flag is + * completed, either after transmission in the IT context or after being filled in the IR context. + * The callback function is also called when the header buffer in the context becomes full, If it + * is required to process the context in the current context, fw_iso_context_flush_completions() is + * available instead. + * + * Context: Any context. + */ +static inline void fw_iso_context_schedule_flush_completions(struct fw_iso_context *ctx) +{ + queue_work(ctx->card->isoc_wq, &ctx->work); +} + int fw_iso_context_start(struct fw_iso_context *ctx, int cycle, int sync, int tags); int fw_iso_context_stop(struct fw_iso_context *ctx); |