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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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#ifndef __MOST_CORE_H__#define __MOST_CORE_H__
#include <linux/types.h>#include <linux/device.h>
struct module;struct interface_private;
/** * enum most_interface_type - Interface type */enum most_interface_type { ITYPE_LOOPBACK = 1, ITYPE_I2C, ITYPE_I2S, ITYPE_TSI, ITYPE_HBI, ITYPE_MEDIALB_DIM, ITYPE_MEDIALB_DIM2, ITYPE_USB, ITYPE_PCIE};
/** * enum most_channel_direction - Channel direction. */enum most_channel_direction { MOST_CH_RX = 1 << 0, MOST_CH_TX = 1 << 1,};
/** * enum most_channel_data_type - Channel data type. */enum most_channel_data_type { MOST_CH_CONTROL = 1 << 0, MOST_CH_ASYNC = 1 << 1, MOST_CH_ISOC = 1 << 2, MOST_CH_SYNC = 1 << 5,};
enum most_status_flags { /* MBO was processed successfully (data was send or received )*/ MBO_SUCCESS = 0, /* The MBO contains wrong or missing information. */ MBO_E_INVAL, /* MBO was completed as HDM Channel will be closed */ MBO_E_CLOSE,};
/** * struct most_channel_capability - Channel capability * @direction: Supported channel directions. * The value is bitwise OR-combination of the values from the * enumeration most_channel_direction. Zero is allowed value and means * "channel may not be used". * @data_type: Supported channel data types. * The value is bitwise OR-combination of the values from the * enumeration most_channel_data_type. Zero is allowed value and means * "channel may not be used". * @num_buffers_packet: Maximum number of buffers supported by this channel * for packet data types (Async,Control,QoS) * @buffer_size_packet: Maximum buffer size supported by this channel * for packet data types (Async,Control,QoS) * @num_buffers_streaming: Maximum number of buffers supported by this channel * for streaming data types (Sync,AV Packetized) * @buffer_size_streaming: Maximum buffer size supported by this channel * for streaming data types (Sync,AV Packetized) * @name_suffix: Optional suffix providean by an HDM that is attached to the * regular channel name. * * Describes the capabilities of a MOST channel like supported Data Types * and directions. This information is provided by an HDM for the MostCore. * * The Core creates read only sysfs attribute files in * /sys/devices/most/mdev#/<channel>/ with the * following attributes: * -available_directions * -available_datatypes * -number_of_packet_buffers * -number_of_stream_buffers * -size_of_packet_buffer * -size_of_stream_buffer * where content of each file is a string with all supported properties of this * very channel attribute. */struct most_channel_capability { u16 direction; u16 data_type; u16 num_buffers_packet; u16 buffer_size_packet; u16 num_buffers_streaming; u16 buffer_size_streaming; const char *name_suffix;};
/** * struct most_channel_config - stores channel configuration * @direction: direction of the channel * @data_type: data type travelling over this channel * @num_buffers: number of buffers * @buffer_size: size of a buffer for AIM. * Buffer size may be cutted down by HDM in a configure callback * to match to a given interface and channel type. * @extra_len: additional buffer space for internal HDM purposes like padding. * May be set by HDM in a configure callback if needed. * @subbuffer_size: size of a subbuffer * @packets_per_xact: number of MOST frames that are packet inside one USB * packet. This is USB specific * @dbr_size: DBR data buffer size (MediaLB communication only) * * Describes the configuration for a MOST channel. This information is * provided from the MostCore to a HDM (like the Medusa PCIe Interface) as a * parameter of the "configure" function call. */struct most_channel_config { enum most_channel_direction direction; enum most_channel_data_type data_type; u16 num_buffers; u16 buffer_size; u16 extra_len; u16 subbuffer_size; u16 packets_per_xact; u16 dbr_size;};
/* * struct mbo - MOST Buffer Object. * @context: context for core completion handler * @priv: private data for HDM * * public: documented fields that are used for the communications * between MostCore and HDMs * * @list: list head for use by the mbo's current owner * @ifp: (in) associated interface instance * @num_buffers_ptr: amount of pool buffers * @hdm_channel_id: (in) HDM channel instance * @virt_address: (in) kernel virtual address of the buffer * @bus_address: (in) bus address of the buffer * @buffer_length: (in) buffer payload length * @processed_length: (out) processed length * @status: (out) transfer status * @complete: (in) completion routine * * The core allocates and initializes the MBO. * * The HDM receives MBO for transfer from the core with the call to enqueue(). * The HDM copies the data to- or from the buffer depending on configured * channel direction, set "processed_length" and "status" and completes * the transfer procedure by calling the completion routine. * * Finally, the MBO is being deallocated or recycled for further * transfers of the same or a different HDM. * * Directions of usage: * The core driver should never access any MBO fields (even if marked * as "public") while the MBO is owned by an HDM. The ownership starts with * the call of enqueue() and ends with the call of its complete() routine. * * II. * Every HDM attached to the core driver _must_ ensure that it returns any MBO * it owns (due to a previous call to enqueue() by the core driver) before it * de-registers an interface or gets unloaded from the kernel. If this direction * is violated memory leaks will occur, since the core driver does _not_ track * MBOs it is currently not in control of. * */struct mbo { void *context; void *priv; struct list_head list; struct most_interface *ifp; int *num_buffers_ptr; u16 hdm_channel_id; void *virt_address; dma_addr_t bus_address; u16 buffer_length; u16 processed_length; enum most_status_flags status; void (*complete)(struct mbo *mbo);};
/** * struct most_interface - Interface instance description. * * Describes an interface of a MOST device the core driver is bound to. * This structure is allocated and initialized in the HDM. MostCore may not * modify this structure. * * @dev: the actual device * @driver_dev: struct device for calling snd_card_new() * @mod: module * @interface: Interface type. \sa most_interface_type. * @description: PRELIMINARY. * Unique description of the device instance from point of view of the * interface in free text form (ASCII). * It may be a hexadecimal presentation of the memory address for the MediaLB * IP or USB device ID with USB properties for USB interface, etc. * @num_channels: Number of channels and size of the channel_vector. * @channel_vector: Properties of the channels. * Array index represents channel ID by the driver. * @dma_alloc: Callback to interface driver to allocation DMA memory. * @dma_free: Callback to interface driver to free a DMA memory allocation. * @configure: Callback to change data type for the channel of the * interface instance. May be zero if the instance of the interface is not * configurable. Parameter channel_config describes direction and data * type for the channel, configured by the higher level. The content of * @enqueue: Delivers MBO to the HDM for processing. * After HDM completes Rx- or Tx- operation the processed MBO shall * be returned back to the MostCore using completion routine. * The reason to get the MBO delivered from the MostCore after the channel * is poisoned is the re-opening of the channel by the application. * In this case the HDM shall hold MBOs and service the channel as usual. * The HDM must be able to hold at least one MBO for each channel. * The callback returns a negative value on error, otherwise 0. * @poison_channel: Informs HDM about closing the channel. The HDM shall * cancel all transfers and synchronously or asynchronously return * all enqueued for this channel MBOs using the completion routine. * The callback returns a negative value on error, otherwise 0. * @request_netinfo: triggers retrieving of network info from the HDM by * means of "Message exchange over MDP/MEP" * The call of the function request_netinfo with the parameter on_netinfo as * NULL prohibits use of the previously obtained function pointer. * @priv: Private field used by mostcore to store context information. * @p: &struct interface_private pointer */struct most_interface { struct device *dev; struct device *driver_dev; struct module *mod; enum most_interface_type interface; const char *description; unsigned int num_channels; struct most_channel_capability *channel_vector; void *(*dma_alloc)(struct mbo *mbo, u32 size); void (*dma_free)(struct mbo *mbo, u32 size); int (*configure)(struct most_interface *iface, int channel_idx, struct most_channel_config *channel_config); int (*enqueue)(struct most_interface *iface, int channel_idx, struct mbo *mbo); int (*poison_channel)(struct most_interface *iface, int channel_idx); void (*request_netinfo)(struct most_interface *iface, int channel_idx, void (*on_netinfo)(struct most_interface *iface, unsigned char link_stat, unsigned char *mac_addr)); void *priv; struct interface_private *p;};
/** * struct most_component - identifies a loadable component for the mostcore * @list: list_head * @name: component name * @mod: owning module * @probe_channel: function for core to notify driver about channel connection * @disconnect_channel: callback function to disconnect a certain channel * @rx_completion: completion handler for received packets * @tx_completion: completion handler for transmitted packets * @cfg_complete: setup completion function called after the device is matched */struct most_component { struct list_head list; const char *name; struct module *mod; int (*probe_channel)(struct most_interface *iface, int channel_idx, struct most_channel_config *cfg, char *name, char *param); int (*disconnect_channel)(struct most_interface *iface, int channel_idx); int (*rx_completion)(struct mbo *mbo); int (*tx_completion)(struct most_interface *iface, int channel_idx); int (*cfg_complete)(void);};
/** * most_register_interface - Registers instance of the interface. * @iface: Pointer to the interface instance description. * * Returns: a pointer to the kobject of the generated instance. * * Note: HDM has to ensure that any reference held on the kobj is * released before deregistering the interface. */int most_register_interface(struct most_interface *iface);
/** * most_deregister_interface - Deregisters instance of the interface. * @iface: Pointer to the interface instance description. */void most_deregister_interface(struct most_interface *iface);void most_submit_mbo(struct mbo *mbo);
/** * most_stop_enqueue - prevents core from enqueing MBOs * @iface: pointer to interface * @channel_idx: channel index */void most_stop_enqueue(struct most_interface *iface, int channel_idx);
/** * most_resume_enqueue - allow core to enqueue MBOs again * @iface: pointer to interface * @channel_idx: channel index * * This clears the enqueue halt flag and enqueues all MBOs currently * in wait fifo. */void most_resume_enqueue(struct most_interface *iface, int channel_idx);int most_register_component(struct most_component *comp);int most_deregister_component(struct most_component *comp);struct mbo *most_get_mbo(struct most_interface *iface, int channel_idx, struct most_component *comp);void most_put_mbo(struct mbo *mbo);int channel_has_mbo(struct most_interface *iface, int channel_idx, struct most_component *comp);int most_start_channel(struct most_interface *iface, int channel_idx, struct most_component *comp);int most_stop_channel(struct most_interface *iface, int channel_idx, struct most_component *comp);int __init configfs_init(void);int most_register_configfs_subsys(struct most_component *comp);void most_deregister_configfs_subsys(struct most_component *comp);int most_add_link(char *mdev, char *mdev_ch, char *comp_name, char *link_name, char *comp_param);int most_remove_link(char *mdev, char *mdev_ch, char *comp_name);int most_set_cfg_buffer_size(char *mdev, char *mdev_ch, u16 val);int most_set_cfg_subbuffer_size(char *mdev, char *mdev_ch, u16 val);int most_set_cfg_dbr_size(char *mdev, char *mdev_ch, u16 val);int most_set_cfg_num_buffers(char *mdev, char *mdev_ch, u16 val);int most_set_cfg_datatype(char *mdev, char *mdev_ch, char *buf);int most_set_cfg_direction(char *mdev, char *mdev_ch, char *buf);int most_set_cfg_packets_xact(char *mdev, char *mdev_ch, u16 val);int most_cfg_complete(char *comp_name);void most_interface_register_notify(const char *mdev_name);#endif /* MOST_CORE_H_ */