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qemu-e2k/include/hw/scsi/scsi.h
Markus Armbruster a64aa5785d hw: Deprecate -drive if=scsi with non-onboard HBAs 
Block backends defined with "-drive if=T" with T other than "none" are
meant to be picked up by machine initialization code: a suitable
frontend gets created and wired up automatically.

Drives defined with if=scsi are also picked up by SCSI HBAs added with
-device, unlike other interface types.  Deprecate this usage, as follows.

Create the frontends for onboard HBAs in machine initialization code,
exactly like we do for if=ide and other interface types.  Change
scsi_legacy_handle_cmdline() to create a frontend only when it's still
missing, and warn that this usage is deprecated.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1487161136-9018-3-git-send-email-armbru@redhat.com>
2017-02-21 13:17:45 +01:00

284 lines
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#ifndef QEMU_HW_SCSI_H
#define QEMU_HW_SCSI_H
#include "hw/qdev.h"
#include "hw/block/block.h"
#include "sysemu/sysemu.h"
#include "qemu/notify.h"
#define MAX_SCSI_DEVS 255
#define SCSI_CMD_BUF_SIZE 16
#define SCSI_SENSE_LEN 18
#define SCSI_SENSE_LEN_SCANNER 32
#define SCSI_INQUIRY_LEN 36
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_OLD 96
#define SCSI_SENSE_BUF_SIZE 252
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;
void *hba_private;
size_t resid;
SCSICommand cmd;
NotifierList cancel_notifiers;
/* Note:
* - fields before sense are initialized by scsi_req_alloc;
* - sense[] is uninitialized;
* - fields after sense are memset to 0 by scsi_req_alloc.
* */
uint8_t sense[SCSI_SENSE_BUF_SIZE];
uint32_t sense_len;
bool enqueued;
bool io_canceled;
bool retry;
bool dma_started;
BlockAIOCB *aiocb;
QEMUSGList *sg;
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;
void (*realize)(SCSIDevice *dev, Error **errp);
int (*parse_cdb)(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
void *hba_private);
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;
uint64_t wwn;
uint64_t port_wwn;
};
extern const VMStateDescription vmstate_scsi_device;
#define VMSTATE_SCSI_DEVICE(_field, _state) { \
.name = (stringify(_field)), \
.size = sizeof(SCSIDevice), \
.vmsd = &vmstate_scsi_device, \
.flags = VMS_STRUCT, \
.offset = vmstate_offset_value(_state, _field, SCSIDevice), \
}
/* 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);
uint8_t *(*get_buf)(SCSIRequest *req);
void (*save_request)(QEMUFile *f, SCSIRequest *req);
void (*load_request)(QEMUFile *f, SCSIRequest *req);
};
struct SCSIBusInfo {
int tcq;
int max_channel, max_target, max_lun;
int (*parse_cdb)(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
void *hba_private);
void (*transfer_data)(SCSIRequest *req, uint32_t arg);
void (*complete)(SCSIRequest *req, uint32_t arg, size_t resid);
void (*cancel)(SCSIRequest *req);
void (*change)(SCSIBus *bus, SCSIDevice *dev, SCSISense sense);
QEMUSGList *(*get_sg_list)(SCSIRequest *req);
void (*save_request)(QEMUFile *f, SCSIRequest *req);
void *(*load_request)(QEMUFile *f, SCSIRequest *req);
void (*free_request)(SCSIBus *bus, void *priv);
};
#define TYPE_SCSI_BUS "SCSI"
#define SCSI_BUS(obj) OBJECT_CHECK(SCSIBus, (obj), TYPE_SCSI_BUS)
struct SCSIBus {
BusState qbus;
int busnr;
SCSISense unit_attention;
const SCSIBusInfo *info;
};
void scsi_bus_new(SCSIBus *bus, size_t bus_size, DeviceState *host,
const SCSIBusInfo *info, const char *bus_name);
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, BlockBackend *blk,
int unit, bool removable, int bootindex,
const char *serial, Error **errp);
void scsi_bus_legacy_handle_cmdline(SCSIBus *bus, bool deprecated);
void scsi_legacy_handle_cmdline(void);
/*
* 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, Invalid field in parameter list */
extern const struct SCSISense sense_code_INVALID_PARAM;
/* Illegal request, Parameter list length error */
extern const struct SCSISense sense_code_INVALID_PARAM_LEN;
/* 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;
/* Illegal request, Invalid Transfer Tag */
extern const struct SCSISense sense_code_INVALID_TAG;
/* 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;
/* Command aborted, Overlapped Commands Attempted */
extern const struct SCSISense sense_code_OVERLAPPED_COMMANDS;
/* LUN not ready, Capacity data has changed */
extern const struct SCSISense sense_code_CAPACITY_CHANGED;
/* 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;
/* Data Protection, Write Protected */
extern const struct SCSISense sense_code_WRITE_PROTECTED;
/* Data Protection, Space Allocation Failed Write Protect */
extern const struct SCSISense sense_code_SPACE_ALLOC_FAILED;
#define SENSE_CODE(x) sense_code_ ## x
uint32_t scsi_data_cdb_xfer(uint8_t *buf);
uint32_t scsi_cdb_xfer(uint8_t *buf);
int scsi_cdb_length(uint8_t *buf);
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);
SCSIRequest *scsi_req_ref(SCSIRequest *req);
void scsi_req_unref(SCSIRequest *req);
int scsi_bus_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
void *hba_private);
int scsi_req_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf);
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_cancel_complete(SCSIRequest *req);
void scsi_req_cancel(SCSIRequest *req);
void scsi_req_cancel_async(SCSIRequest *req, Notifier *notifier);
void scsi_req_retry(SCSIRequest *req);
void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense);
void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense);
void scsi_device_report_change(SCSIDevice *dev, SCSISense sense);
void scsi_device_unit_attention_reported(SCSIDevice *dev);
void scsi_generic_read_device_identification(SCSIDevice *dev);
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
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