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virtio_scsi.h
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/* * This header is BSD licensed so anyone can use the definitions to implement * compatible drivers/servers. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _LINUX_VIRTIO_SCSI_H #define _LINUX_VIRTIO_SCSI_H #include <linux/virtio_types.h> /* Default values of the CDB and sense data size configuration fields */ #define VIRTIO_SCSI_CDB_DEFAULT_SIZE 32 #define VIRTIO_SCSI_SENSE_DEFAULT_SIZE 96 #ifndef VIRTIO_SCSI_CDB_SIZE #define VIRTIO_SCSI_CDB_SIZE VIRTIO_SCSI_CDB_DEFAULT_SIZE #endif #ifndef VIRTIO_SCSI_SENSE_SIZE #define VIRTIO_SCSI_SENSE_SIZE VIRTIO_SCSI_SENSE_DEFAULT_SIZE #endif /* SCSI command request, followed by data-out */ struct virtio_scsi_cmd_req { __u8 lun[8]; /* Logical Unit Number */ __virtio64 tag; /* Command identifier */ __u8 task_attr; /* Task attribute */ __u8 prio; /* SAM command priority field */ __u8 crn; __u8 cdb[VIRTIO_SCSI_CDB_SIZE]; } __attribute__((packed)); /* SCSI command request, followed by protection information */ struct virtio_scsi_cmd_req_pi { __u8 lun[8]; /* Logical Unit Number */ __virtio64 tag; /* Command identifier */ __u8 task_attr; /* Task attribute */ __u8 prio; /* SAM command priority field */ __u8 crn; __virtio32 pi_bytesout; /* DataOUT PI Number of bytes */ __virtio32 pi_bytesin; /* DataIN PI Number of bytes */ __u8 cdb[VIRTIO_SCSI_CDB_SIZE]; } __attribute__((packed)); /* Response, followed by sense data and data-in */ struct virtio_scsi_cmd_resp { __virtio32 sense_len; /* Sense data length */ __virtio32 resid; /* Residual bytes in data buffer */ __virtio16 status_qualifier; /* Status qualifier */ __u8 status; /* Command completion status */ __u8 response; /* Response values */ __u8 sense[VIRTIO_SCSI_SENSE_SIZE]; } __attribute__((packed)); /* Task Management Request */ struct virtio_scsi_ctrl_tmf_req { __virtio32 type; __virtio32 subtype; __u8 lun[8]; __virtio64 tag; } __attribute__((packed)); struct virtio_scsi_ctrl_tmf_resp { __u8 response; } __attribute__((packed)); /* Asynchronous notification query/subscription */ struct virtio_scsi_ctrl_an_req { __virtio32 type; __u8 lun[8]; __virtio32 event_requested; } __attribute__((packed)); struct virtio_scsi_ctrl_an_resp { __virtio32 event_actual; __u8 response; } __attribute__((packed)); struct virtio_scsi_event { __virtio32 event; __u8 lun[8]; __virtio32 reason; } __attribute__((packed)); struct virtio_scsi_config { __u32 num_queues; __u32 seg_max; __u32 max_sectors; __u32 cmd_per_lun; __u32 event_info_size; __u32 sense_size; __u32 cdb_size; __u16 max_channel; __u16 max_target; __u32 max_lun; } __attribute__((packed)); /* Feature Bits */ #define VIRTIO_SCSI_F_INOUT 0 #define VIRTIO_SCSI_F_HOTPLUG 1 #define VIRTIO_SCSI_F_CHANGE 2 #define VIRTIO_SCSI_F_T10_PI 3 /* Response codes */ #define VIRTIO_SCSI_S_OK 0 #define VIRTIO_SCSI_S_OVERRUN 1 #define VIRTIO_SCSI_S_ABORTED 2 #define VIRTIO_SCSI_S_BAD_TARGET 3 #define VIRTIO_SCSI_S_RESET 4 #define VIRTIO_SCSI_S_BUSY 5 #define VIRTIO_SCSI_S_TRANSPORT_FAILURE 6 #define VIRTIO_SCSI_S_TARGET_FAILURE 7 #define VIRTIO_SCSI_S_NEXUS_FAILURE 8 #define VIRTIO_SCSI_S_FAILURE 9 #define VIRTIO_SCSI_S_FUNCTION_SUCCEEDED 10 #define VIRTIO_SCSI_S_FUNCTION_REJECTED 11 #define VIRTIO_SCSI_S_INCORRECT_LUN 12 /* Controlq type codes. */ #define VIRTIO_SCSI_T_TMF 0 #define VIRTIO_SCSI_T_AN_QUERY 1 #define VIRTIO_SCSI_T_AN_SUBSCRIBE 2 /* Valid TMF subtypes. */ #define VIRTIO_SCSI_T_TMF_ABORT_TASK 0 #define VIRTIO_SCSI_T_TMF_ABORT_TASK_SET 1 #define VIRTIO_SCSI_T_TMF_CLEAR_ACA 2 #define VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET 3 #define VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET 4 #define VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET 5 #define VIRTIO_SCSI_T_TMF_QUERY_TASK 6 #define VIRTIO_SCSI_T_TMF_QUERY_TASK_SET 7 /* Events. */ #define VIRTIO_SCSI_T_EVENTS_MISSED 0x80000000 #define VIRTIO_SCSI_T_NO_EVENT 0 #define VIRTIO_SCSI_T_TRANSPORT_RESET 1 #define VIRTIO_SCSI_T_ASYNC_NOTIFY 2 #define VIRTIO_SCSI_T_PARAM_CHANGE 3 /* Reasons of transport reset event */ #define VIRTIO_SCSI_EVT_RESET_HARD 0 #define VIRTIO_SCSI_EVT_RESET_RESCAN 1 #define VIRTIO_SCSI_EVT_RESET_REMOVED 2 #define VIRTIO_SCSI_S_SIMPLE 0 #define VIRTIO_SCSI_S_ORDERED 1 #define VIRTIO_SCSI_S_HEAD 2 #define VIRTIO_SCSI_S_ACA 3 #endif /* _LINUX_VIRTIO_SCSI_H */