aboutsummaryrefslogtreecommitdiffstats
path: root/hw/scsi.h
blob: dc72b6fc1e6a76ddf2a75616e5fb2e8aeef3cd40 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
#ifndef QEMU_HW_SCSI_H
#define QEMU_HW_SCSI_H

#include "qdev.h"
#include "block.h"
#include "sysemu.h"

#define MAX_SCSI_DEVS	255

#define SCSI_CMD_BUF_SIZE     16

typedef struct SCSIBus SCSIBus;
typedef struct SCSIBusInfo SCSIBusInfo;
typedef struct SCSICommand SCSICommand;
typedef struct SCSIDevice SCSIDevice;
typedef struct SCSIRequest SCSIRequest;
typedef struct SCSIReqOps SCSIReqOps;

enum SCSIXferMode {
    SCSI_XFER_NONE,      /*  TEST_UNIT_READY, ...            */
    SCSI_XFER_FROM_DEV,  /*  READ, INQUIRY, MODE_SENSE, ...  */
    SCSI_XFER_TO_DEV,    /*  WRITE, MODE_SELECT, ...         */
};

typedef struct SCSISense {
    uint8_t key;
    uint8_t asc;
    uint8_t ascq;
} SCSISense;

#define SCSI_SENSE_BUF_SIZE 96

struct SCSICommand {
    uint8_t buf[SCSI_CMD_BUF_SIZE];
    int len;
    size_t xfer;
    uint64_t lba;
    enum SCSIXferMode mode;
};

struct SCSIRequest {
    SCSIBus           *bus;
    SCSIDevice        *dev;
    const SCSIReqOps  *ops;
    uint32_t          refcount;
    uint32_t          tag;
    uint32_t          lun;
    uint32_t          status;
    SCSICommand       cmd;
    BlockDriverAIOCB  *aiocb;
    uint8_t sense[SCSI_SENSE_BUF_SIZE];
    uint32_t sense_len;
    bool enqueued;
    bool io_canceled;
    bool retry;
    void *hba_private;
    QTAILQ_ENTRY(SCSIRequest) next;
};

#define TYPE_SCSI_DEVICE "scsi-device"
#define SCSI_DEVICE(obj) \
     OBJECT_CHECK(SCSIDevice, (obj), TYPE_SCSI_DEVICE)
#define SCSI_DEVICE_CLASS(klass) \
     OBJECT_CLASS_CHECK(SCSIDeviceClass, (klass), TYPE_SCSI_DEVICE)
#define SCSI_DEVICE_GET_CLASS(obj) \
     OBJECT_GET_CLASS(SCSIDeviceClass, (obj), TYPE_SCSI_DEVICE)

typedef struct SCSIDeviceClass {
    DeviceClass parent_class;
    int (*init)(SCSIDevice *dev);
    void (*destroy)(SCSIDevice *s);
    SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun,
                              uint8_t *buf, void *hba_private);
    void (*unit_attention_reported)(SCSIDevice *s);
} SCSIDeviceClass;

struct SCSIDevice
{
    DeviceState qdev;
    VMChangeStateEntry *vmsentry;
    QEMUBH *bh;
    uint32_t id;
    BlockConf conf;
    SCSISense unit_attention;
    bool sense_is_ua;
    uint8_t sense[SCSI_SENSE_BUF_SIZE];
    uint32_t sense_len;
    QTAILQ_HEAD(, SCSIRequest) requests;
    uint32_t channel;
    uint32_t lun;
    int blocksize;
    int type;
    uint64_t max_lba;
};

/* cdrom.c */
int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track);
int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num);

/* scsi-bus.c */
struct SCSIReqOps {
    size_t size;
    void (*free_req)(SCSIRequest *req);
    int32_t (*send_command)(SCSIRequest *req, uint8_t *buf);
    void (*read_data)(SCSIRequest *req);
    void (*write_data)(SCSIRequest *req);
    void (*cancel_io)(SCSIRequest *req);
    uint8_t *(*get_buf)(SCSIRequest *req);
};

struct SCSIBusInfo {
    int tcq;
    int max_channel, max_target, max_lun;
    void (*transfer_data)(SCSIRequest *req, uint32_t arg);
    void (*complete)(SCSIRequest *req, uint32_t arg);
    void (*cancel)(SCSIRequest *req);
};

struct SCSIBus {
    BusState qbus;
    int busnr;

    SCSISense unit_attention;
    const SCSIBusInfo *info;
};

void scsi_bus_new(SCSIBus *bus, DeviceState *host, const SCSIBusInfo *info);

static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
{
    return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
}

SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv,
                                      int unit, bool removable, int bootindex);
int scsi_bus_legacy_handle_cmdline(SCSIBus *bus);

/*
 * Predefined sense codes
 */

/* No sense data available */
extern const struct SCSISense sense_code_NO_SENSE;
/* LUN not ready, Manual intervention required */
extern const struct SCSISense sense_code_LUN_NOT_READY;
/* LUN not ready, Medium not present */
extern const struct SCSISense sense_code_NO_MEDIUM;
/* LUN not ready, medium removal prevented */
extern const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED;
/* Hardware error, internal target failure */
extern const struct SCSISense sense_code_TARGET_FAILURE;
/* Illegal request, invalid command operation code */
extern const struct SCSISense sense_code_INVALID_OPCODE;
/* Illegal request, LBA out of range */
extern const struct SCSISense sense_code_LBA_OUT_OF_RANGE;
/* Illegal request, Invalid field in CDB */
extern const struct SCSISense sense_code_INVALID_FIELD;
/* Illegal request, LUN not supported */
extern const struct SCSISense sense_code_LUN_NOT_SUPPORTED;
/* Illegal request, Saving parameters not supported */
extern const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED;
/* Illegal request, Incompatible format */
extern const struct SCSISense sense_code_INCOMPATIBLE_FORMAT;
/* Illegal request, medium removal prevented */
extern const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED;
/* Command aborted, I/O process terminated */
extern const struct SCSISense sense_code_IO_ERROR;
/* Command aborted, I_T Nexus loss occurred */
extern const struct SCSISense sense_code_I_T_NEXUS_LOSS;
/* Command aborted, Logical Unit failure */
extern const struct SCSISense sense_code_LUN_FAILURE;
/* LUN not ready, Medium not present */
extern const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM;
/* Unit attention, Power on, reset or bus device reset occurred */
extern const struct SCSISense sense_code_RESET;
/* Unit attention, Medium may have changed*/
extern const struct SCSISense sense_code_MEDIUM_CHANGED;
/* Unit attention, Reported LUNs data has changed */
extern const struct SCSISense sense_code_REPORTED_LUNS_CHANGED;
/* Unit attention, Device internal reset */
extern const struct SCSISense sense_code_DEVICE_INTERNAL_RESET;

#define SENSE_CODE(x) sense_code_ ## x

int scsi_sense_valid(SCSISense sense);
int scsi_build_sense(uint8_t *in_buf, int in_len,
                     uint8_t *buf, int len, bool fixed);

SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
                            uint32_t tag, uint32_t lun, void *hba_private);
SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
                          uint8_t *buf, void *hba_private);
int32_t scsi_req_enqueue(SCSIRequest *req);
void scsi_req_free(SCSIRequest *req);
SCSIRequest *scsi_req_ref(SCSIRequest *req);
void scsi_req_unref(SCSIRequest *req);

void scsi_req_build_sense(SCSIRequest *req, SCSISense sense);
void scsi_req_print(SCSIRequest *req);
void scsi_req_continue(SCSIRequest *req);
void scsi_req_data(SCSIRequest *req, int len);
void scsi_req_complete(SCSIRequest *req, int status);
uint8_t *scsi_req_get_buf(SCSIRequest *req);
int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len);
void scsi_req_abort(SCSIRequest *req, int status);
void scsi_req_cancel(SCSIRequest *req);
void scsi_req_retry(SCSIRequest *req);
void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense);
int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed);
SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int target, int lun);

/* scsi-generic.c. */
extern const SCSIReqOps scsi_generic_req_ops;

#endif