msc_interface Struct Reference
[USB MSC BBB Device Interface driver]

A Mass Storage Class interface instance. More...

Collaboration diagram for msc_interface:

[legend]

Data Fields
struct udm_interface	iface
	Interface object registered with the UDM layer.
struct udc *	udc
	The low-level USB Device Controller.
struct block_device *	bdev
	The block device used for storage.
usb_ep_id_t	bulk_in_ep
	Bulk-IN endpoint used for data transfer.
usb_ep_id_t	bulk_out_ep
	Bulk-OUT endpoint used for data transfer.
dma_addr_t	sense_data
	Buffer holding the current sense information.
uint32_t	blocks_queued
	Number of blocks queued for transfer via bdev.
uint32_t	blocks_total
	The total number of blocks to be transfered.
uint32_t	first_lba
	The first Logical Block Address to be transfered.
atomic_t	blk_blocks_pending
	Number of pending block buffer blocks.
atomic_t	usb_reqs_pending
	Number of pending USB data requests.
dma_addr_t	cbw
	The Command Block Wrapper.
dma_addr_t	csw
	The Command Status Wrapper.
struct usb_request *	cbw_csw_req
	USB request used for transfering the CBW and CSW.
struct block_request *	block_req
	Block request used for doing block data transfers via bdev.
uint16_t	busy_asc
	Additional Sense Code (Qualifier) set by usb_msc_set_busy().
void(*	busy_cb )(void *)
	Function to be called when the MSC interface has been blocked.
void *	busy_cb_data
	Arbitrary data to be passed to busy_cb().
bool	queue_locked
	True while queuing new buffers for a request.
bool	not_ready
	True if all block data transfer requests are to be blocked.
bool	xfer_in_progress
	True if there's currently a block data transfer in progress.

---

Detailed Description

A Mass Storage Class interface instance.

For internal use only.

Definition at line 100 of file msc_bulk.c.

---

Field Documentation

struct block_device* msc_interface::bdev

The block device used for storage.

Definition at line 106 of file msc_bulk.c.

Referenced by msc_do_read(), msc_read_worker(), and msc_write_worker().

atomic_t msc_interface::blk_blocks_pending

Number of pending block buffer blocks.

Definition at line 120 of file msc_bulk.c.

Referenced by msc_do_read(), msc_read_worker(), and msc_submit_read_buffers().

struct block_request* msc_interface::block_req

Block request used for doing block data transfers via bdev.

Definition at line 130 of file msc_bulk.c.

Referenced by msc_do_read(), msc_read_worker(), and msc_write_worker().

uint32_t msc_interface::blocks_queued

Number of blocks queued for transfer via bdev.

Definition at line 114 of file msc_bulk.c.

Referenced by msc_do_read(), msc_read_worker(), msc_submit_read_buffers(), msc_submit_write_data_req(), and msc_write_worker().

uint32_t msc_interface::blocks_total

The total number of blocks to be transfered.

Definition at line 116 of file msc_bulk.c.

Referenced by msc_do_read(), msc_read_worker(), and msc_write_worker().

usb_ep_id_t msc_interface::bulk_in_ep

Bulk-IN endpoint used for data transfer.

Definition at line 108 of file msc_bulk.c.

usb_ep_id_t msc_interface::bulk_out_ep

Bulk-OUT endpoint used for data transfer.

Definition at line 110 of file msc_bulk.c.

Referenced by msc_submit_write_data_req().

uint16_t msc_interface::busy_asc

Additional Sense Code (Qualifier) set by usb_msc_set_busy().

Definition at line 132 of file msc_bulk.c.

Referenced by msc_do_read().

void(* msc_interface::busy_cb)(void *)

Function to be called when the MSC interface has been blocked.

Definition at line 134 of file msc_bulk.c.

Referenced by msc_queue_empty().

void* msc_interface::busy_cb_data

Arbitrary data to be passed to busy_cb().

Definition at line 136 of file msc_bulk.c.

Referenced by msc_queue_empty().

dma_addr_t msc_interface::cbw

The Command Block Wrapper.

Definition at line 124 of file msc_bulk.c.

struct usb_request* msc_interface::cbw_csw_req

USB request used for transfering the CBW and CSW.

Definition at line 128 of file msc_bulk.c.

dma_addr_t msc_interface::csw

The Command Status Wrapper.

Definition at line 126 of file msc_bulk.c.

uint32_t msc_interface::first_lba

The first Logical Block Address to be transfered.

Definition at line 118 of file msc_bulk.c.

struct udm_interface msc_interface::iface

Interface object registered with the UDM layer.

Definition at line 102 of file msc_bulk.c.

bool msc_interface::not_ready

True if all block data transfer requests are to be blocked.

Definition at line 140 of file msc_bulk.c.

Referenced by msc_do_read(), and msc_queue_empty().

bool msc_interface::queue_locked

True while queuing new buffers for a request.

Definition at line 138 of file msc_bulk.c.

Referenced by msc_do_read(), msc_read_worker(), and msc_write_worker().

dma_addr_t msc_interface::sense_data

Buffer holding the current sense information.

Definition at line 112 of file msc_bulk.c.

struct udc* msc_interface::udc

The low-level USB Device Controller.

Definition at line 104 of file msc_bulk.c.

Referenced by msc_submit_write_data_req().

atomic_t msc_interface::usb_reqs_pending

Number of pending USB data requests.

Definition at line 122 of file msc_bulk.c.

Referenced by msc_do_read(), msc_submit_write_data_req(), and msc_write_worker().

bool msc_interface::xfer_in_progress

True if there's currently a block data transfer in progress.

Definition at line 142 of file msc_bulk.c.

Referenced by msc_do_read(), and msc_queue_empty().

---

The documentation for this struct was generated from the following file:

• drivers/usb/udi/msc_bulk.c