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Annotation of qemu/linux-headers/linux/virtio_config.h, revision 1.1.1.1

1.1       root        1: #ifndef _LINUX_VIRTIO_CONFIG_H
                      2: #define _LINUX_VIRTIO_CONFIG_H
                      3: /* This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so
                      4:  * anyone can use the definitions to implement compatible drivers/servers.
                      5:  *
                      6:  * Redistribution and use in source and binary forms, with or without
                      7:  * modification, are permitted provided that the following conditions
                      8:  * are met:
                      9:  * 1. Redistributions of source code must retain the above copyright
                     10:  *    notice, this list of conditions and the following disclaimer.
                     11:  * 2. Redistributions in binary form must reproduce the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer in the
                     13:  *    documentation and/or other materials provided with the distribution.
                     14:  * 3. Neither the name of IBM nor the names of its contributors
                     15:  *    may be used to endorse or promote products derived from this software
                     16:  *    without specific prior written permission.
                     17:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
                     18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     20:  * ARE DISCLAIMED.  IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
                     21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     27:  * SUCH DAMAGE. */
                     28: 
                     29: /* Virtio devices use a standardized configuration space to define their
                     30:  * features and pass configuration information, but each implementation can
                     31:  * store and access that space differently. */
                     32: #include <linux/types.h>
                     33: 
                     34: /* Status byte for guest to report progress, and synchronize features. */
                     35: /* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */
                     36: #define VIRTIO_CONFIG_S_ACKNOWLEDGE    1
                     37: /* We have found a driver for the device. */
                     38: #define VIRTIO_CONFIG_S_DRIVER         2
                     39: /* Driver has used its parts of the config, and is happy */
                     40: #define VIRTIO_CONFIG_S_DRIVER_OK      4
                     41: /* We've given up on this device. */
                     42: #define VIRTIO_CONFIG_S_FAILED         0x80
                     43: 
                     44: /* Some virtio feature bits (currently bits 28 through 31) are reserved for the
                     45:  * transport being used (eg. virtio_ring), the rest are per-device feature
                     46:  * bits. */
                     47: #define VIRTIO_TRANSPORT_F_START       28
                     48: #define VIRTIO_TRANSPORT_F_END         32
                     49: 
                     50: /* Do we get callbacks when the ring is completely used, even if we've
                     51:  * suppressed them? */
                     52: #define VIRTIO_F_NOTIFY_ON_EMPTY       24
                     53: 
                     54: #endif /* _LINUX_VIRTIO_CONFIG_H */

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