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vioscsireg.h revision 1.1.10.2 
      1 /*	$OpenBSD: vioscsireg.h,v 1.1 2013/12/20 21:50:49 matthew Exp $	*/
      2 /*
      3  * Copyright (c) 2013 Google Inc.
      4  *
      5  * Permission to use, copy, modify, and distribute this software for any
      6  * purpose with or without fee is hereby granted, provided that the above
      7  * copyright notice and this permission notice appear in all copies.
      8  *
      9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     16  */
     17 
     18 /* Configuration registers */
     19 #define VIRTIO_SCSI_CONFIG_NUM_QUEUES		0 /* 32bit */
     20 #define VIRTIO_SCSI_CONFIG_SEG_MAX		4 /* 32bit */
     21 #define VIRTIO_SCSI_CONFIG_MAX_SECTORS		8 /* 32bit */
     22 #define VIRTIO_SCSI_CONFIG_CMD_PER_LUN		12 /* 32bit */
     23 #define VIRTIO_SCSI_CONFIG_EVENT_INFO_SIZE	16 /* 32bit */
     24 #define VIRTIO_SCSI_CONFIG_SENSE_SIZE		20 /* 32bit */
     25 #define VIRTIO_SCSI_CONFIG_CDB_SIZE		24 /* 32bit */
     26 #define VIRTIO_SCSI_CONFIG_MAX_CHANNEL		28 /* 16bit */
     27 #define VIRTIO_SCSI_CONFIG_MAX_TARGET		30 /* 16bit */
     28 #define VIRTIO_SCSI_CONFIG_MAX_LUN		32 /* 32bit */
     29 
     30 /* Feature bits */
     31 #define VIRTIO_SCSI_F_INOUT			(1<<0)
     32 #define VIRTIO_SCSI_F_HOTPLUG			(1<<1)
     33 
     34 /* Response status values */
     35 #define VIRTIO_SCSI_S_OK			0
     36 #define VIRTIO_SCSI_S_OVERRUN			1
     37 #define VIRTIO_SCSI_S_ABORTED			2
     38 #define VIRTIO_SCSI_S_BAD_TARGET		3
     39 #define VIRTIO_SCSI_S_RESET			4
     40 #define VIRTIO_SCSI_S_BUSY			5
     41 #define VIRTIO_SCSI_S_TRANSPORT_FAILURE		6
     42 #define VIRTIO_SCSI_S_TARGET_FAILURE		7
     43 #define VIRTIO_SCSI_S_NEXUS_FAILURE		8
     44 #define VIRTIO_SCSI_S_FAILURE			9
     45 
     46 /* Task attributes */
     47 #define VIRTIO_SCSI_S_SIMPLE			0
     48 #define VIRTIO_SCSI_S_ORDERED			1
     49 #define VIRTIO_SCSI_S_HEAD			2
     50 #define VIRTIO_SCSI_S_ACA			3
     51 
     52 /* Request header structure */
     53 struct virtio_scsi_req_hdr {
     54 	uint8_t		lun[8];
     55 	uint64_t	id;
     56 	uint8_t		task_attr;
     57 	uint8_t		prio;
     58 	uint8_t		crn;
     59 	uint8_t		cdb[32];
     60 } __packed;
     61 /* Followed by data-out. */
     62 
     63 /* Response header structure */
     64 struct virtio_scsi_res_hdr {
     65 	uint32_t	sense_len;
     66 	uint32_t	residual;
     67 	uint16_t	status_qualifier;
     68 	uint8_t		status;
     69 	uint8_t		response;
     70 	uint8_t		sense[96];
     71 } __packed;
     72 /* Followed by data-in. */
     73