usb/storage/usb.h

1 /* SPDX-License-Identifier: GPL-2.0+ */
3  * Driver for USB Mass Storage compliant devices
4  * Main Header File
7  *   (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
12  * This driver is based on the 'USB Mass Storage Class' document. This
16  * similar to commands in the SCSI-II and ATAPI specifications.
19  * exhibits class-specific exemptions from the USB specification.
54 /* Dynamic bitflag definitions (us->dflags): used in set_bit() etc. */
68  * We provide a DMA-mapped I/O buffer for use with small USB transfers.
69  * It turns out that CB[I] needs a 12-byte buffer and Bulk-only needs a
70  * 31-byte buffer.  But Freecom needs a 64-byte buffer, so that's the
74 #define US_IOBUF_SIZE		64	/* Size of the DMA-mapped I/O buffer */
97 						/* device-filter entry     */
130 	struct usb_sg_request	current_sg;	 /* scatter-gather req.  */
158 	return (struct us_data *) host->hostdata;  in host_to_us()
169 #define scsi_unlock(host)	spin_unlock_irq(host->host_lock)
170 #define scsi_lock(host)		spin_lock_irq(host->host_lock)
172 /* General routines provided by the usb-storage standard core */