255 lines
7.9 KiB
C
255 lines
7.9 KiB
C
/*
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* usbif.h
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*
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* USB I/O interface for Xen guest OSes.
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*
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* Copyright (C) 2009, FUJITSU LABORATORIES LTD.
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* Author: Noboru Iwamatsu <n_iwamatsu@jp.fujitsu.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __XEN_PUBLIC_IO_USBIF_H__
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#define __XEN_PUBLIC_IO_USBIF_H__
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#include "ring.h"
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#include "../grant_table.h"
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/*
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* Feature and Parameter Negotiation
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* =================================
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* The two halves of a Xen pvUSB driver utilize nodes within the XenStore to
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* communicate capabilities and to negotiate operating parameters. This
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* section enumerates these nodes which reside in the respective front and
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* backend portions of the XenStore, following the XenBus convention.
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*
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* Any specified default value is in effect if the corresponding XenBus node
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* is not present in the XenStore.
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*
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* XenStore nodes in sections marked "PRIVATE" are solely for use by the
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* driver side whose XenBus tree contains them.
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*
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*****************************************************************************
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* Backend XenBus Nodes
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*****************************************************************************
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*
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*------------------ Backend Device Identification (PRIVATE) ------------------
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*
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* num-ports
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* Values: unsigned [1...31]
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*
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* Number of ports for this (virtual) USB host connector.
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*
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* usb-ver
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* Values: unsigned [1...2]
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*
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* USB version of this host connector: 1 = USB 1.1, 2 = USB 2.0.
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*
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* port/[1...31]
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* Values: string
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*
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* Physical USB device connected to the given port, e.g. "3-1.5".
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*
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*****************************************************************************
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* Frontend XenBus Nodes
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*****************************************************************************
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*
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*----------------------- Request Transport Parameters -----------------------
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*
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* event-channel
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* Values: unsigned
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*
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* The identifier of the Xen event channel used to signal activity
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* in the ring buffer.
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*
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* urb-ring-ref
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* Values: unsigned
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*
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* The Xen grant reference granting permission for the backend to map
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* the sole page in a single page sized ring buffer. This is the ring
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* buffer for urb requests.
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*
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* conn-ring-ref
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* Values: unsigned
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*
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* The Xen grant reference granting permission for the backend to map
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* the sole page in a single page sized ring buffer. This is the ring
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* buffer for connection/disconnection requests.
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*
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* protocol
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* Values: string (XEN_IO_PROTO_ABI_*)
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* Default Value: XEN_IO_PROTO_ABI_NATIVE
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*
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* The machine ABI rules governing the format of all ring request and
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* response structures.
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*
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*/
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enum usb_spec_version {
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USB_VER_UNKNOWN = 0,
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USB_VER_USB11,
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USB_VER_USB20,
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USB_VER_USB30, /* not supported yet */
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};
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/*
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* USB pipe in usbif_request
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*
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* - port number: bits 0-4
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* (USB_MAXCHILDREN is 31)
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*
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* - operation flag: bit 5
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* (0 = submit urb,
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* 1 = unlink urb)
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*
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* - direction: bit 7
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* (0 = Host-to-Device [Out]
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* 1 = Device-to-Host [In])
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*
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* - device address: bits 8-14
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*
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* - endpoint: bits 15-18
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*
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* - pipe type: bits 30-31
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* (00 = isochronous, 01 = interrupt,
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* 10 = control, 11 = bulk)
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*/
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#define USBIF_PIPE_PORT_MASK 0x0000001f
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#define USBIF_PIPE_UNLINK 0x00000020
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#define USBIF_PIPE_DIR 0x00000080
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#define USBIF_PIPE_DEV_MASK 0x0000007f
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#define USBIF_PIPE_DEV_SHIFT 8
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#define USBIF_PIPE_EP_MASK 0x0000000f
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#define USBIF_PIPE_EP_SHIFT 15
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#define USBIF_PIPE_TYPE_MASK 0x00000003
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#define USBIF_PIPE_TYPE_SHIFT 30
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#define USBIF_PIPE_TYPE_ISOC 0
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#define USBIF_PIPE_TYPE_INT 1
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#define USBIF_PIPE_TYPE_CTRL 2
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#define USBIF_PIPE_TYPE_BULK 3
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#define usbif_pipeportnum(pipe) ((pipe) & USBIF_PIPE_PORT_MASK)
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#define usbif_setportnum_pipe(pipe, portnum) ((pipe) | (portnum))
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#define usbif_pipeunlink(pipe) ((pipe) & USBIF_PIPE_UNLINK)
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#define usbif_pipesubmit(pipe) (!usbif_pipeunlink(pipe))
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#define usbif_setunlink_pipe(pipe) ((pipe) | USBIF_PIPE_UNLINK)
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#define usbif_pipein(pipe) ((pipe) & USBIF_PIPE_DIR)
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#define usbif_pipeout(pipe) (!usbif_pipein(pipe))
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#define usbif_pipedevice(pipe) \
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(((pipe) >> USBIF_PIPE_DEV_SHIFT) & USBIF_PIPE_DEV_MASK)
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#define usbif_pipeendpoint(pipe) \
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(((pipe) >> USBIF_PIPE_EP_SHIFT) & USBIF_PIPE_EP_MASK)
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#define usbif_pipetype(pipe) \
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(((pipe) >> USBIF_PIPE_TYPE_SHIFT) & USBIF_PIPE_TYPE_MASK)
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#define usbif_pipeisoc(pipe) (usbif_pipetype(pipe) == USBIF_PIPE_TYPE_ISOC)
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#define usbif_pipeint(pipe) (usbif_pipetype(pipe) == USBIF_PIPE_TYPE_INT)
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#define usbif_pipectrl(pipe) (usbif_pipetype(pipe) == USBIF_PIPE_TYPE_CTRL)
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#define usbif_pipebulk(pipe) (usbif_pipetype(pipe) == USBIF_PIPE_TYPE_BULK)
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#define USBIF_MAX_SEGMENTS_PER_REQUEST (16)
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#define USBIF_MAX_PORTNR 31
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#define USBIF_RING_SIZE 4096
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/*
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* RING for transferring urbs.
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*/
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struct usbif_request_segment {
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grant_ref_t gref;
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uint16_t offset;
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uint16_t length;
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};
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struct usbif_urb_request {
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uint16_t id; /* request id */
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uint16_t nr_buffer_segs; /* number of urb->transfer_buffer segments */
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/* basic urb parameter */
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uint32_t pipe;
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uint16_t transfer_flags;
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#define USBIF_SHORT_NOT_OK 0x0001
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uint16_t buffer_length;
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union {
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uint8_t ctrl[8]; /* setup_packet (Ctrl) */
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struct {
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uint16_t interval; /* maximum (1024*8) in usb core */
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uint16_t start_frame; /* start frame */
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uint16_t number_of_packets; /* number of ISO packet */
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uint16_t nr_frame_desc_segs; /* number of iso_frame_desc segments */
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} isoc;
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struct {
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uint16_t interval; /* maximum (1024*8) in usb core */
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uint16_t pad[3];
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} intr;
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struct {
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uint16_t unlink_id; /* unlink request id */
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uint16_t pad[3];
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} unlink;
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} u;
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/* urb data segments */
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struct usbif_request_segment seg[USBIF_MAX_SEGMENTS_PER_REQUEST];
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};
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typedef struct usbif_urb_request usbif_urb_request_t;
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struct usbif_urb_response {
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uint16_t id; /* request id */
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uint16_t start_frame; /* start frame (ISO) */
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int32_t status; /* status (non-ISO) */
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int32_t actual_length; /* actual transfer length */
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int32_t error_count; /* number of ISO errors */
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};
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typedef struct usbif_urb_response usbif_urb_response_t;
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DEFINE_RING_TYPES(usbif_urb, struct usbif_urb_request, struct usbif_urb_response);
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#define USB_URB_RING_SIZE __CONST_RING_SIZE(usbif_urb, USBIF_RING_SIZE)
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/*
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* RING for notifying connect/disconnect events to frontend
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*/
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struct usbif_conn_request {
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uint16_t id;
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};
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typedef struct usbif_conn_request usbif_conn_request_t;
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struct usbif_conn_response {
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uint16_t id; /* request id */
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uint8_t portnum; /* port number */
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uint8_t speed; /* usb_device_speed */
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#define USBIF_SPEED_NONE 0
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#define USBIF_SPEED_LOW 1
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#define USBIF_SPEED_FULL 2
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#define USBIF_SPEED_HIGH 3
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};
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typedef struct usbif_conn_response usbif_conn_response_t;
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DEFINE_RING_TYPES(usbif_conn, struct usbif_conn_request, struct usbif_conn_response);
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#define USB_CONN_RING_SIZE __CONST_RING_SIZE(usbif_conn, USBIF_RING_SIZE)
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#endif /* __XEN_PUBLIC_IO_USBIF_H__ */
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