2 * Copyright (c) 2009-2012 Microsoft Corp.
3 * Copyright (c) 2012 NetApp Inc.
4 * Copyright (c) 2012 Citrix Inc.
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31 #ifndef __HV_VSTORAGE_H__
32 #define __HV_VSTORAGE_H__
35 * Major/minor macros. Minor version is in LSB, meaning that earlier flat
36 * version numbers will be interpreted as "0.x" (i.e., 1 becomes 0.1).
39 #define VMSTOR_PROTOCOL_MAJOR(VERSION_) (((VERSION_) >> 8) & 0xff)
40 #define VMSTOR_PROTOCOL_MINOR(VERSION_) (((VERSION_) ) & 0xff)
41 #define VMSTOR_PROTOCOL_VERSION(MAJOR_, MINOR_) ((((MAJOR_) & 0xff) << 8) | \
44 #define VMSTOR_PROTOCOL_VERSION_WIN6 VMSTOR_PROTOCOL_VERSION(2, 0)
45 #define VMSTOR_PROTOCOL_VERSION_WIN7 VMSTOR_PROTOCOL_VERSION(4, 2)
46 #define VMSTOR_PROTOCOL_VERSION_WIN8 VMSTOR_PROTOCOL_VERSION(5, 1)
47 #define VMSTOR_PROTOCOL_VERSION_WIN8_1 VMSTOR_PROTOCOL_VERSION(6, 0)
48 #define VMSTOR_PROTOCOL_VERSION_WIN10 VMSTOR_PROTOCOL_VERSION(6, 2)
52 #define VMSTOR_INVALID_PROTOCOL_VERSION -1
57 * V1 RC < 2008/1/31 1.0
58 * V1 RC > 2008/1/31 2.0
63 #define VMSTOR_PROTOCOL_VERSION_CURRENT VMSTOR_PROTOCOL_VERSION(5, 1)
66 * Packet structure ops describing virtual storage requests.
68 enum vstor_packet_ops {
69 VSTOR_OPERATION_COMPLETEIO = 1,
70 VSTOR_OPERATION_REMOVEDEVICE = 2,
71 VSTOR_OPERATION_EXECUTESRB = 3,
72 VSTOR_OPERATION_RESETLUN = 4,
73 VSTOR_OPERATION_RESETADAPTER = 5,
74 VSTOR_OPERATION_RESETBUS = 6,
75 VSTOR_OPERATION_BEGININITIALIZATION = 7,
76 VSTOR_OPERATION_ENDINITIALIZATION = 8,
77 VSTOR_OPERATION_QUERYPROTOCOLVERSION = 9,
78 VSTOR_OPERATION_QUERYPROPERTIES = 10,
79 VSTOR_OPERATION_ENUMERATE_BUS = 11,
80 VSTOR_OPERATION_FCHBA_DATA = 12,
81 VSTOR_OPERATION_CREATE_MULTI_CHANNELS = 13,
82 VSTOR_OPERATION_MAXIMUM = 13
87 * Platform neutral description of a scsi request -
88 * this remains the same across the write regardless of 32/64 bit
89 * note: it's patterned off the Windows DDK SCSI_PASS_THROUGH structure
92 #define CDB16GENERIC_LENGTH 0x10
93 #define SENSE_BUFFER_SIZE 0x14
94 #define MAX_DATA_BUFFER_LENGTH_WITH_PADDING 0x14
96 #define POST_WIN7_STORVSC_SENSE_BUFFER_SIZE 0x14
97 #define PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE 0x12
100 struct vmscsi_win8_extension {
102 * The following were added in Windows 8
106 uint8_t queue_action;
108 uint32_t time_out_value;
109 uint32_t queue_sort_ey;
117 /* HBA number, set to the order number detected by initiator. */
119 /* SCSI bus number or bus_id, different from CAM's path_id. */
126 uint8_t sense_info_len;
130 uint32_t transfer_len;
133 uint8_t cdb[CDB16GENERIC_LENGTH];
135 uint8_t sense_data[SENSE_BUFFER_SIZE];
137 uint8_t reserved_array[MAX_DATA_BUFFER_LENGTH_WITH_PADDING];
141 * The following was added in win8.
143 struct vmscsi_win8_extension win8_extension;
148 * This structure is sent during the initialization phase to get the different
149 * properties of the channel.
152 struct vmstor_chan_props {
157 uint16_t max_channel_cnt;
160 * Note: port number is only really known on the client side
164 uint32_t max_transfer_bytes;
167 * This id is unique for each channel and will correspond with
168 * vendor specific data in the inquiry_ata
175 * This structure is sent during the storage protocol negotiations.
178 struct vmstor_proto_ver
181 * Major (MSW) and minor (LSW) version numbers.
183 uint16_t major_minor;
185 uint16_t revision; /* always zero */
189 * Channel Property Flags
192 #define STORAGE_CHANNEL_REMOVABLE_FLAG 0x1
193 #define STORAGE_CHANNEL_EMULATED_IDE_FLAG 0x2
196 struct vstor_packet {
198 * Requested operation type
200 enum vstor_packet_ops operation;
203 * Flags - see below for values
208 * Status of the request returned from the server side.
215 * Structure used to forward SCSI commands from the client to
218 struct vmscsi_req vm_srb;
221 * Structure used to query channel properties.
223 struct vmstor_chan_props chan_props;
226 * Used during version negotiations.
228 struct vmstor_proto_ver version;
231 * Number of multichannels to create
233 uint16_t multi_channels_cnt;
240 * SRB (SCSI Request Block) Status Codes
242 #define SRB_STATUS_PENDING 0x00
243 #define SRB_STATUS_SUCCESS 0x01
244 #define SRB_STATUS_ABORTED 0x02
245 #define SRB_STATUS_ABORT_FAILED 0x03
246 #define SRB_STATUS_ERROR 0x04
247 #define SRB_STATUS_BUSY 0x05
250 * SRB Status Masks (can be combined with above status codes)
252 #define SRB_STATUS_QUEUE_FROZEN 0x40
253 #define SRB_STATUS_AUTOSENSE_VALID 0x80
254 #define SRB_STATUS_INVALID_LUN 0X20
261 * This flag indicates that the server should send back a completion for this
264 #define REQUEST_COMPLETION_FLAG 0x1
267 * This is the set of flags that the vsc can set in any packets it sends
269 #define VSC_LEGAL_FLAGS (REQUEST_COMPLETION_FLAG)
271 #endif /* __HV_VSTORAGE_H__ */