diff options
| -rw-r--r-- | drivers/iio/buffer/industrialio-buffer-cb.c | 2 | ||||
| -rw-r--r-- | drivers/iio/buffer/kfifo_buf.c | 1 | ||||
| -rw-r--r-- | drivers/iio/industrialio-buffer.c | 1 | ||||
| -rw-r--r-- | drivers/iio/industrialio-core.c | 1 | ||||
| -rw-r--r-- | include/linux/iio/buffer.h | 156 | ||||
| -rw-r--r-- | include/linux/iio/buffer_impl.h | 162 |
6 files changed, 167 insertions, 156 deletions
diff --git a/drivers/iio/buffer/industrialio-buffer-cb.c b/drivers/iio/buffer/industrialio-buffer-cb.c index 79fb2f9de759..4847534700e7 100644 --- a/drivers/iio/buffer/industrialio-buffer-cb.c +++ b/drivers/iio/buffer/industrialio-buffer-cb.c @@ -11,7 +11,7 @@ #include <linux/err.h> #include <linux/export.h> #include <linux/iio/iio.h> -#include <linux/iio/buffer.h> +#include <linux/iio/buffer_impl.h> #include <linux/iio/consumer.h> struct iio_cb_buffer { diff --git a/drivers/iio/buffer/kfifo_buf.c b/drivers/iio/buffer/kfifo_buf.c index a47118e7db6f..047fe757ab97 100644 --- a/drivers/iio/buffer/kfifo_buf.c +++ b/drivers/iio/buffer/kfifo_buf.c @@ -8,6 +8,7 @@ #include <linux/iio/iio.h> #include <linux/iio/buffer.h> #include <linux/iio/kfifo_buf.h> +#include <linux/iio/buffer_impl.h> #include <linux/sched.h> #include <linux/poll.h> diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index a04498231f94..4972986f6455 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -26,6 +26,7 @@ #include "iio_core.h" #include <linux/iio/sysfs.h> #include <linux/iio/buffer.h> +#include <linux/iio/buffer_impl.h> static const char * const iio_endian_prefix[] = { [IIO_BE] = "be", diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index c601698e0910..d18ded45bedd 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -32,6 +32,7 @@ #include <linux/iio/sysfs.h> #include <linux/iio/events.h> #include <linux/iio/buffer.h> +#include <linux/iio/buffer_impl.h> /* IDA to assign each registered device a unique id */ static DEFINE_IDA(iio_ida); diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h index 5cdfe2b7d674..48767c776119 100644 --- a/include/linux/iio/buffer.h +++ b/include/linux/iio/buffer.h @@ -11,155 +11,11 @@ #define _IIO_BUFFER_GENERIC_H_ #include <linux/sysfs.h> #include <linux/iio/iio.h> -#include <linux/kref.h> - -#ifdef CONFIG_IIO_BUFFER struct iio_buffer; void iio_buffer_set_attrs(struct iio_buffer *buffer, const struct attribute **attrs); -/** - * INDIO_BUFFER_FLAG_FIXED_WATERMARK - Watermark level of the buffer can not be - * configured. It has a fixed value which will be buffer specific. - */ -#define INDIO_BUFFER_FLAG_FIXED_WATERMARK BIT(0) - -/** - * struct iio_buffer_access_funcs - access functions for buffers. - * @store_to: actually store stuff to the buffer - * @read_first_n: try to get a specified number of bytes (must exist) - * @data_available: indicates how much data is available for reading from - * the buffer. - * @request_update: if a parameter change has been marked, update underlying - * storage. - * @set_bytes_per_datum:set number of bytes per datum - * @set_length: set number of datums in buffer - * @enable: called if the buffer is attached to a device and the - * device starts sampling. Calls are balanced with - * @disable. - * @disable: called if the buffer is attached to a device and the - * device stops sampling. Calles are balanced with @enable. - * @release: called when the last reference to the buffer is dropped, - * should free all resources allocated by the buffer. - * @modes: Supported operating modes by this buffer type - * @flags: A bitmask combination of INDIO_BUFFER_FLAG_* - * - * The purpose of this structure is to make the buffer element - * modular as event for a given driver, different usecases may require - * different buffer designs (space efficiency vs speed for example). - * - * It is worth noting that a given buffer implementation may only support a - * small proportion of these functions. The core code 'should' cope fine with - * any of them not existing. - **/ -struct iio_buffer_access_funcs { - int (*store_to)(struct iio_buffer *buffer, const void *data); - int (*read_first_n)(struct iio_buffer *buffer, - size_t n, - char __user *buf); - size_t (*data_available)(struct iio_buffer *buffer); - - int (*request_update)(struct iio_buffer *buffer); - - int (*set_bytes_per_datum)(struct iio_buffer *buffer, size_t bpd); - int (*set_length)(struct iio_buffer *buffer, int length); - - int (*enable)(struct iio_buffer *buffer, struct iio_dev *indio_dev); - int (*disable)(struct iio_buffer *buffer, struct iio_dev *indio_dev); - - void (*release)(struct iio_buffer *buffer); - - unsigned int modes; - unsigned int flags; -}; - -/** - * struct iio_buffer - general buffer structure - * - * Note that the internals of this structure should only be of interest to - * those writing new buffer implementations. - */ -struct iio_buffer { - /** @length: Number of datums in buffer. */ - int length; - - /** @bytes_per_datum: Size of individual datum including timestamp. */ - int bytes_per_datum; - - /** - * @access: Buffer access functions associated with the - * implementation. - */ - const struct iio_buffer_access_funcs *access; - - /** @scan_mask: Bitmask used in masking scan mode elements. */ - long *scan_mask; - - /** @demux_list: List of operations required to demux the scan. */ - struct list_head demux_list; - - /** @pollq: Wait queue to allow for polling on the buffer. */ - wait_queue_head_t pollq; - - /** @watermark: Number of datums to wait for poll/read. */ - unsigned int watermark; - - /* private: */ - /* - * @scan_el_attrs: Control of scan elements if that scan mode - * control method is used. - */ - struct attribute_group *scan_el_attrs; - - /* @scan_timestamp: Does the scan mode include a timestamp. */ - bool scan_timestamp; - - /* @scan_el_dev_attr_list: List of scan element related attributes. */ - struct list_head scan_el_dev_attr_list; - - /* @buffer_group: Attributes of the buffer group. */ - struct attribute_group buffer_group; - - /* - * @scan_el_group: Attribute group for those attributes not - * created from the iio_chan_info array. - */ - struct attribute_group scan_el_group; - - /* @stufftoread: Flag to indicate new data. */ - bool stufftoread; - - /* @attrs: Standard attributes of the buffer. */ - const struct attribute **attrs; - - /* @demux_bounce: Buffer for doing gather from incoming scan. */ - void *demux_bounce; - - /* @buffer_list: Entry in the devices list of current buffers. */ - struct list_head buffer_list; - - /* @ref: Reference count of the buffer. */ - struct kref ref; -}; - -/** - * iio_update_buffers() - add or remove buffer from active list - * @indio_dev: device to add buffer to - * @insert_buffer: buffer to insert - * @remove_buffer: buffer_to_remove - * - * Note this will tear down the all buffering and build it up again - */ -int iio_update_buffers(struct iio_dev *indio_dev, - struct iio_buffer *insert_buffer, - struct iio_buffer *remove_buffer); - -/** - * iio_buffer_init() - Initialize the buffer structure - * @buffer: buffer to be initialized - **/ -void iio_buffer_init(struct iio_buffer *buffer); int iio_push_to_buffers(struct iio_dev *indio_dev, const void *data); @@ -189,19 +45,9 @@ static inline int iio_push_to_buffers_with_timestamp(struct iio_dev *indio_dev, } bool iio_validate_scan_mask_onehot(struct iio_dev *indio_dev, - const unsigned long *mask); - -struct iio_buffer *iio_buffer_get(struct iio_buffer *buffer); -void iio_buffer_put(struct iio_buffer *buffer); + const unsigned long *mask); void iio_device_attach_buffer(struct iio_dev *indio_dev, struct iio_buffer *buffer); -#else /* CONFIG_IIO_BUFFER */ - -static inline void iio_buffer_get(struct iio_buffer *buffer) {} -static inline void iio_buffer_put(struct iio_buffer *buffer) {} - -#endif /* CONFIG_IIO_BUFFER */ - #endif /* _IIO_BUFFER_GENERIC_H_ */ diff --git a/include/linux/iio/buffer_impl.h b/include/linux/iio/buffer_impl.h new file mode 100644 index 000000000000..8daba198fafa --- /dev/null +++ b/include/linux/iio/buffer_impl.h @@ -0,0 +1,162 @@ +#ifndef _IIO_BUFFER_GENERIC_IMPL_H_ +#define _IIO_BUFFER_GENERIC_IMPL_H_ +#include <linux/sysfs.h> +#include <linux/kref.h> + +#ifdef CONFIG_IIO_BUFFER + +struct iio_dev; +struct iio_buffer; + +/** + * INDIO_BUFFER_FLAG_FIXED_WATERMARK - Watermark level of the buffer can not be + * configured. It has a fixed value which will be buffer specific. + */ +#define INDIO_BUFFER_FLAG_FIXED_WATERMARK BIT(0) + +/** + * struct iio_buffer_access_funcs - access functions for buffers. + * @store_to: actually store stuff to the buffer + * @read_first_n: try to get a specified number of bytes (must exist) + * @data_available: indicates how much data is available for reading from + * the buffer. + * @request_update: if a parameter change has been marked, update underlying + * storage. + * @set_bytes_per_datum:set number of bytes per datum + * @set_length: set number of datums in buffer + * @enable: called if the buffer is attached to a device and the + * device starts sampling. Calls are balanced with + * @disable. + * @disable: called if the buffer is attached to a device and the + * device stops sampling. Calles are balanced with @enable. + * @release: called when the last reference to the buffer is dropped, + * should free all resources allocated by the buffer. + * @modes: Supported operating modes by this buffer type + * @flags: A bitmask combination of INDIO_BUFFER_FLAG_* + * + * The purpose of this structure is to make the buffer element + * modular as event for a given driver, different usecases may require + * different buffer designs (space efficiency vs speed for example). + * + * It is worth noting that a given buffer implementation may only support a + * small proportion of these functions. The core code 'should' cope fine with + * any of them not existing. + **/ +struct iio_buffer_access_funcs { + int (*store_to)(struct iio_buffer *buffer, const void *data); + int (*read_first_n)(struct iio_buffer *buffer, + size_t n, + char __user *buf); + size_t (*data_available)(struct iio_buffer *buffer); + + int (*request_update)(struct iio_buffer *buffer); + + int (*set_bytes_per_datum)(struct iio_buffer *buffer, size_t bpd); + int (*set_length)(struct iio_buffer *buffer, int length); + + int (*enable)(struct iio_buffer *buffer, struct iio_dev *indio_dev); + int (*disable)(struct iio_buffer *buffer, struct iio_dev *indio_dev); + + void (*release)(struct iio_buffer *buffer); + + unsigned int modes; + unsigned int flags; +}; + +/** + * struct iio_buffer - general buffer structure + * + * Note that the internals of this structure should only be of interest to + * those writing new buffer implementations. + */ +struct iio_buffer { + /** @length: Number of datums in buffer. */ + int length; + + /** @bytes_per_datum: Size of individual datum including timestamp. */ + int bytes_per_datum; + + /** + * @access: Buffer access functions associated with the + * implementation. + */ + const struct iio_buffer_access_funcs *access; + + /** @scan_mask: Bitmask used in masking scan mode elements. */ + long *scan_mask; + + /** @demux_list: List of operations required to demux the scan. */ + struct list_head demux_list; + + /** @pollq: Wait queue to allow for polling on the buffer. */ + wait_queue_head_t pollq; + + /** @watermark: Number of datums to wait for poll/read. */ + unsigned int watermark; + + /* private: */ + /* + * @scan_el_attrs: Control of scan elements if that scan mode + * control method is used. + */ + struct attribute_group *scan_el_attrs; + + /* @scan_timestamp: Does the scan mode include a timestamp. */ + bool scan_timestamp; + + /* @scan_el_dev_attr_list: List of scan element related attributes. */ + struct list_head scan_el_dev_attr_list; + + /* @buffer_group: Attributes of the buffer group. */ + struct attribute_group buffer_group; + + /* + * @scan_el_group: Attribute group for those attributes not + * created from the iio_chan_info array. + */ + struct attribute_group scan_el_group; + + /* @stufftoread: Flag to indicate new data. */ + bool stufftoread; + + /* @attrs: Standard attributes of the buffer. */ + const struct attribute **attrs; + + /* @demux_bounce: Buffer for doing gather from incoming scan. */ + void *demux_bounce; + + /* @buffer_list: Entry in the devices list of current buffers. */ + struct list_head buffer_list; + + /* @ref: Reference count of the buffer. */ + struct kref ref; +}; + +/** + * iio_update_buffers() - add or remove buffer from active list + * @indio_dev: device to add buffer to + * @insert_buffer: buffer to insert + * @remove_buffer: buffer_to_remove + * + * Note this will tear down the all buffering and build it up again + */ +int iio_update_buffers(struct iio_dev *indio_dev, + struct iio_buffer *insert_buffer, + struct iio_buffer *remove_buffer); + +/** + * iio_buffer_init() - Initialize the buffer structure + * @buffer: buffer to be initialized + **/ +void iio_buffer_init(struct iio_buffer *buffer); + +struct iio_buffer *iio_buffer_get(struct iio_buffer *buffer); +void iio_buffer_put(struct iio_buffer *buffer); + +#else /* CONFIG_IIO_BUFFER */ + +static inline void iio_buffer_get(struct iio_buffer *buffer) {} +static inline void iio_buffer_put(struct iio_buffer *buffer) {} + +#endif /* CONFIG_IIO_BUFFER */ +#endif /* _IIO_BUFFER_GENERIC_IMPL_H_ */ |