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8f36b3b4e1
USBIP driver packs URB transfer flags in network packets that are exchanged between Server (usbip_host) and Client (vhci_hcd). URB_* flags are internal to kernel and could change. Where as USBIP URB flags exchanged in network packets are USBIP user API must not change. Add USBIP_URB* flags to make this an explicit API and change the client and server to map them. Details as follows: Client tx path (USBIP_CMD_SUBMIT): - Maps URB_* to USBIP_URB_* when it sends USBIP_CMD_SUBMIT packet. Server rx path (USBIP_CMD_SUBMIT): - Maps USBIP_URB_* to URB_* when it receives USBIP_CMD_SUBMIT packet. Flags aren't included in USBIP_CMD_UNLINK and USBIP_RET_SUBMIT packets and no special handling is needed for them in the following cases: - Server rx path (USBIP_CMD_UNLINK) - Client rx path & Server tx path (USBIP_RET_SUBMIT) Update protocol documentation to reflect the change. Suggested-by: Hongren Zenithal Zheng <i@zenithal.me> Suggested-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Link: https://lore.kernel.org/r/20220824002456.94605-1-skhan@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* usbip.h
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*
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* USBIP uapi defines and function prototypes etc.
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*/
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#ifndef _UAPI_LINUX_USBIP_H
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#define _UAPI_LINUX_USBIP_H
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/* usbip device status - exported in usbip device sysfs status */
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enum usbip_device_status {
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/* sdev is available. */
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SDEV_ST_AVAILABLE = 0x01,
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/* sdev is now used. */
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SDEV_ST_USED,
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/* sdev is unusable because of a fatal error. */
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SDEV_ST_ERROR,
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/* vdev does not connect a remote device. */
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VDEV_ST_NULL,
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/* vdev is used, but the USB address is not assigned yet */
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VDEV_ST_NOTASSIGNED,
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VDEV_ST_USED,
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VDEV_ST_ERROR
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};
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/* USB URB Transfer flags:
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*
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* USBIP server and client (vchi) pack URBs in TCP packets. The following
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* are the transfer type defines used in USBIP protocol.
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*/
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#define USBIP_URB_SHORT_NOT_OK 0x0001
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#define USBIP_URB_ISO_ASAP 0x0002
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#define USBIP_URB_NO_TRANSFER_DMA_MAP 0x0004
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#define USBIP_URB_ZERO_PACKET 0x0040
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#define USBIP_URB_NO_INTERRUPT 0x0080
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#define USBIP_URB_FREE_BUFFER 0x0100
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#define USBIP_URB_DIR_IN 0x0200
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#define USBIP_URB_DIR_OUT 0
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#define USBIP_URB_DIR_MASK USBIP_URB_DIR_IN
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#define USBIP_URB_DMA_MAP_SINGLE 0x00010000
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#define USBIP_URB_DMA_MAP_PAGE 0x00020000
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#define USBIP_URB_DMA_MAP_SG 0x00040000
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#define USBIP_URB_MAP_LOCAL 0x00080000
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#define USBIP_URB_SETUP_MAP_SINGLE 0x00100000
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#define USBIP_URB_SETUP_MAP_LOCAL 0x00200000
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#define USBIP_URB_DMA_SG_COMBINED 0x00400000
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#define USBIP_URB_ALIGNED_TEMP_BUFFER 0x00800000
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#endif /* _UAPI_LINUX_USBIP_H */
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