1 /******************************************************************************
4 * Shared definitions between backend driver and Xen guest Virtual CDROM
7 * Copyright (c) 2008, Pat Campell plc@novell.com
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this source file (the "Software"), to deal in the Software without
11 * restriction, including without limitation the rights to use, copy, modify,
12 * merge, publish, distribute, sublicense, and/or sell copies of the Software,
13 * and to permit persons to whom the Software is furnished to do so, subject to
14 * 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 DEALINGS
28 #ifndef __XEN_PUBLIC_IO_CDROMIF_H__
29 #define __XEN_PUBLIC_IO_CDROMIF_H__
32 * Queries backend for CDROM support
34 #define XEN_TYPE_CDROM_SUPPORT _IO('c', 1)
36 struct xen_cdrom_support
39 int8_t ret; /* returned, 0 succeded, -1 error */
40 int8_t err; /* returned, backend errno */
41 int8_t supported; /* returned, 1 supported */
45 * Opens backend device, returns drive geometry or
46 * any encountered errors
48 #define XEN_TYPE_CDROM_OPEN _IO('c', 2)
56 int8_t media_present; /* returned */
57 uint32_t sectors; /* returned */
58 uint32_t sector_size; /* returned */
59 int32_t payload_offset; /* offset to backend node name payload */
63 * Queries backend for media changed status
65 #define XEN_TYPE_CDROM_MEDIA_CHANGED _IO('c', 3)
67 struct xen_cdrom_media_changed
72 int8_t media_changed; /* returned */
76 * Sends vcd generic CDROM packet to backend, followed
77 * immediately by the vcd_generic_command payload
79 #define XEN_TYPE_CDROM_PACKET _IO('c', 4)
81 struct xen_cdrom_packet
87 int32_t payload_offset; /* offset to vcd_generic_command payload */
90 /* CDROM_PACKET_COMMAND, payload for XEN_TYPE_CDROM_PACKET */
91 struct vcd_generic_command
93 uint8_t cmd[CDROM_PACKET_SIZE];
95 uint32_t buffer_offset;
98 uint32_t sense_offset;
99 uint8_t data_direction;
105 union xen_block_packet
108 struct xen_cdrom_support xcs;
109 struct xen_cdrom_open xco;
110 struct xen_cdrom_media_changed xcmc;
111 struct xen_cdrom_packet xcp;
114 #define PACKET_PAYLOAD_OFFSET (sizeof(struct xen_cdrom_packet))
115 #define PACKET_SENSE_OFFSET (PACKET_PAYLOAD_OFFSET + sizeof(struct vcd_generic_command))
116 #define PACKET_BUFFER_OFFSET (PACKET_SENSE_OFFSET + sizeof(struct request_sense))
117 #define MAX_PACKET_DATA (PAGE_SIZE - sizeof(struct xen_cdrom_packet) - \
118 sizeof(struct vcd_generic_command) - sizeof(struct request_sense))