4 * USB I/O interface for Xen guest OSes.
6 * Copyright (C) 2009, FUJITSU LABORATORIES LTD.
7 * Author: Noboru Iwamatsu <n_iwamatsu@jp.fujitsu.com>
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this software and associated documentation files (the "Software"), to
11 * deal in the Software without restriction, including without limitation the
12 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
13 * sell copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
24 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
25 * DEALINGS IN THE SOFTWARE.
28 #ifndef __XEN_PUBLIC_IO_USBIF_H__
29 #define __XEN_PUBLIC_IO_USBIF_H__
32 #include "../grant_table.h"
35 * Feature and Parameter Negotiation
36 * =================================
37 * The two halves of a Xen pvUSB driver utilize nodes within the XenStore to
38 * communicate capabilities and to negotiate operating parameters. This
39 * section enumerates these nodes which reside in the respective front and
40 * backend portions of the XenStore, following the XenBus convention.
42 * Any specified default value is in effect if the corresponding XenBus node
43 * is not present in the XenStore.
45 * XenStore nodes in sections marked "PRIVATE" are solely for use by the
46 * driver side whose XenBus tree contains them.
48 *****************************************************************************
49 * Backend XenBus Nodes
50 *****************************************************************************
52 *------------------ Backend Device Identification (PRIVATE) ------------------
55 * Values: unsigned [1...31]
57 * Number of ports for this (virtual) USB host connector.
60 * Values: unsigned [1...2]
62 * USB version of this host connector: 1 = USB 1.1, 2 = USB 2.0.
67 * Physical USB device connected to the given port, e.g. "3-1.5".
69 *****************************************************************************
70 * Frontend XenBus Nodes
71 *****************************************************************************
73 *----------------------- Request Transport Parameters -----------------------
78 * The identifier of the Xen event channel used to signal activity
84 * The Xen grant reference granting permission for the backend to map
85 * the sole page in a single page sized ring buffer. This is the ring
86 * buffer for urb requests.
91 * The Xen grant reference granting permission for the backend to map
92 * the sole page in a single page sized ring buffer. This is the ring
93 * buffer for connection/disconnection requests.
96 * Values: string (XEN_IO_PROTO_ABI_*)
97 * Default Value: XEN_IO_PROTO_ABI_NATIVE
99 * The machine ABI rules governing the format of all ring request and
100 * response structures.
104 enum usb_spec_version {
108 USB_VER_USB30, /* not supported yet */
112 * USB pipe in usbif_request
114 * - port number: bits 0-4
115 * (USB_MAXCHILDREN is 31)
117 * - operation flag: bit 5
122 * (0 = Host-to-Device [Out]
123 * 1 = Device-to-Host [In])
125 * - device address: bits 8-14
127 * - endpoint: bits 15-18
129 * - pipe type: bits 30-31
130 * (00 = isochronous, 01 = interrupt,
131 * 10 = control, 11 = bulk)
134 #define USBIF_PIPE_PORT_MASK 0x0000001f
135 #define USBIF_PIPE_UNLINK 0x00000020
136 #define USBIF_PIPE_DIR 0x00000080
137 #define USBIF_PIPE_DEV_MASK 0x0000007f
138 #define USBIF_PIPE_DEV_SHIFT 8
139 #define USBIF_PIPE_EP_MASK 0x0000000f
140 #define USBIF_PIPE_EP_SHIFT 15
141 #define USBIF_PIPE_TYPE_MASK 0x00000003
142 #define USBIF_PIPE_TYPE_SHIFT 30
143 #define USBIF_PIPE_TYPE_ISOC 0
144 #define USBIF_PIPE_TYPE_INT 1
145 #define USBIF_PIPE_TYPE_CTRL 2
146 #define USBIF_PIPE_TYPE_BULK 3
148 #define usbif_pipeportnum(pipe) ((pipe) & USBIF_PIPE_PORT_MASK)
149 #define usbif_setportnum_pipe(pipe, portnum) ((pipe) | (portnum))
151 #define usbif_pipeunlink(pipe) ((pipe) & USBIF_PIPE_UNLINK)
152 #define usbif_pipesubmit(pipe) (!usbif_pipeunlink(pipe))
153 #define usbif_setunlink_pipe(pipe) ((pipe) | USBIF_PIPE_UNLINK)
155 #define usbif_pipein(pipe) ((pipe) & USBIF_PIPE_DIR)
156 #define usbif_pipeout(pipe) (!usbif_pipein(pipe))
158 #define usbif_pipedevice(pipe) \
159 (((pipe) >> USBIF_PIPE_DEV_SHIFT) & USBIF_PIPE_DEV_MASK)
161 #define usbif_pipeendpoint(pipe) \
162 (((pipe) >> USBIF_PIPE_EP_SHIFT) & USBIF_PIPE_EP_MASK)
164 #define usbif_pipetype(pipe) \
165 (((pipe) >> USBIF_PIPE_TYPE_SHIFT) & USBIF_PIPE_TYPE_MASK)
166 #define usbif_pipeisoc(pipe) (usbif_pipetype(pipe) == USBIF_PIPE_TYPE_ISOC)
167 #define usbif_pipeint(pipe) (usbif_pipetype(pipe) == USBIF_PIPE_TYPE_INT)
168 #define usbif_pipectrl(pipe) (usbif_pipetype(pipe) == USBIF_PIPE_TYPE_CTRL)
169 #define usbif_pipebulk(pipe) (usbif_pipetype(pipe) == USBIF_PIPE_TYPE_BULK)
171 #define USBIF_MAX_SEGMENTS_PER_REQUEST (16)
172 #define USBIF_MAX_PORTNR 31
175 * RING for transferring urbs.
177 struct usbif_request_segment {
183 struct usbif_urb_request {
184 uint16_t id; /* request id */
185 uint16_t nr_buffer_segs; /* number of urb->transfer_buffer segments */
187 /* basic urb parameter */
189 uint16_t transfer_flags;
190 uint16_t buffer_length;
192 uint8_t ctrl[8]; /* setup_packet (Ctrl) */
195 uint16_t interval; /* maximum (1024*8) in usb core */
196 uint16_t start_frame; /* start frame */
197 uint16_t number_of_packets; /* number of ISO packet */
198 uint16_t nr_frame_desc_segs; /* number of iso_frame_desc segments */
202 uint16_t interval; /* maximum (1024*8) in usb core */
207 uint16_t unlink_id; /* unlink request id */
213 /* urb data segments */
214 struct usbif_request_segment seg[USBIF_MAX_SEGMENTS_PER_REQUEST];
216 typedef struct usbif_urb_request usbif_urb_request_t;
218 struct usbif_urb_response {
219 uint16_t id; /* request id */
220 uint16_t start_frame; /* start frame (ISO) */
221 int32_t status; /* status (non-ISO) */
222 int32_t actual_length; /* actual transfer length */
223 int32_t error_count; /* number of ISO errors */
225 typedef struct usbif_urb_response usbif_urb_response_t;
227 DEFINE_RING_TYPES(usbif_urb, struct usbif_urb_request, struct usbif_urb_response);
228 #define USB_URB_RING_SIZE __CONST_RING_SIZE(usbif_urb, PAGE_SIZE)
231 * RING for notifying connect/disconnect events to frontend
233 struct usbif_conn_request {
236 typedef struct usbif_conn_request usbif_conn_request_t;
238 struct usbif_conn_response {
239 uint16_t id; /* request id */
240 uint8_t portnum; /* port number */
241 uint8_t speed; /* usb_device_speed */
242 #define USBIF_SPEED_NONE 0
243 #define USBIF_SPEED_LOW 1
244 #define USBIF_SPEED_FULL 2
245 #define USBIF_SPEED_HIGH 3
247 typedef struct usbif_conn_response usbif_conn_response_t;
249 DEFINE_RING_TYPES(usbif_conn, struct usbif_conn_request, struct usbif_conn_response);
250 #define USB_CONN_RING_SIZE __CONST_RING_SIZE(usbif_conn, PAGE_SIZE)
252 #endif /* __XEN_PUBLIC_IO_USBIF_H__ */