diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/firewire-cdev.h | 39 | ||||
| -rw-r--r-- | include/linux/firewire.h | 16 |
2 files changed, 35 insertions, 20 deletions
diff --git a/include/linux/firewire-cdev.h b/include/linux/firewire-cdev.h index 357dbfc2829e..d50036953497 100644 --- a/include/linux/firewire-cdev.h +++ b/include/linux/firewire-cdev.h @@ -207,12 +207,16 @@ struct fw_cdev_event_request2 { * @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 interrupt packet + * @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. + * 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, kernels with ABI version < 5 drop + * header data up to the next interrupt packet.) * * Isochronous transmit events (context type %FW_CDEV_ISO_CONTEXT_TRANSMIT): * @@ -267,9 +271,9 @@ struct fw_cdev_event_iso_interrupt { * * This event is sent in multichannel contexts (context type * %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL) for &fw_cdev_iso_packet buffer - * chunks that have the %FW_CDEV_ISO_INTERRUPT bit set. Whether this happens - * when a packet is completed and/or when a buffer chunk is completed depends - * on the hardware implementation. + * 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, @@ -419,6 +423,9 @@ union fw_cdev_event { #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 @@ -441,6 +448,9 @@ union fw_cdev_event { * - 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 */ /** @@ -851,6 +861,25 @@ struct fw_cdev_stop_iso { }; /** + * struct fw_cdev_flush_iso - flush completed iso packets + * @handle: handle of isochronous context to flush + * + * For %FW_CDEV_ISO_CONTEXT_TRANSMIT or %FW_CDEV_ISO_CONTEXT_RECEIVE contexts, + * report any completed packets. + * + * For %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL contexts, report the current + * offset in the receive buffer, if it has changed; this is typically in the + * middle of some buffer chunk. + * + * Any %FW_CDEV_EVENT_ISO_INTERRUPT or %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL + * events generated by this ioctl are sent synchronously, i.e., are available + * for reading from the file descriptor when this ioctl returns. + */ +struct fw_cdev_flush_iso { + __u32 handle; +}; + +/** * struct fw_cdev_get_cycle_timer - read cycle timer register * @local_time: system time, in microseconds since the Epoch * @cycle_timer: Cycle Time register contents diff --git a/include/linux/firewire.h b/include/linux/firewire.h index 84ccf8e04fa6..cdc9b719e9c7 100644 --- a/include/linux/firewire.h +++ b/include/linux/firewire.h @@ -17,9 +17,6 @@ #include <linux/atomic.h> #include <asm/byteorder.h> -#define fw_notify(s, args...) printk(KERN_NOTICE KBUILD_MODNAME ": " s, ## args) -#define fw_error(s, args...) printk(KERN_ERR KBUILD_MODNAME ": " s, ## args) - #define CSR_REGISTER_BASE 0xfffff0000000ULL /* register offsets are relative to CSR_REGISTER_BASE */ @@ -203,18 +200,6 @@ static inline int fw_device_is_shutdown(struct fw_device *device) return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN; } -static inline struct fw_device *fw_device_get(struct fw_device *device) -{ - get_device(&device->device); - - return device; -} - -static inline void fw_device_put(struct fw_device *device) -{ - put_device(&device->device); -} - int fw_device_enable_phys_dma(struct fw_device *device); /* @@ -441,6 +426,7 @@ int fw_iso_context_queue(struct fw_iso_context *ctx, struct fw_iso_buffer *buffer, 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); 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); |