mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-10-19 01:13:01 +00:00
5c6c0e5136
Currently the SCSIRequest structure is abstracted away and cannot accessed directly from the driver. This requires the handler to do a lookup on an abstract 'tag' which identifies the SCSIRequest structure. With this patch the SCSIRequest structure is exposed to the driver. This allows use to use it directly as an argument to the SCSIDeviceInfo callback functions and remove the lookup. A new callback function 'alloc_req' is introduced matching 'free req'; unref'ing to free up resources after use is moved into the scsi_command_complete callbacks. This temporarily introduces a leak of requests that are cancelled, when they are removed from the queue and not from the driver. This is fixed later by introducing scsi_req_cancel. That patch in turn depends on this one, because the argument to scsi_req_cancel is a SCSIRequest. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
#ifndef QEMU_HW_SCSI_H
|
|
#define QEMU_HW_SCSI_H
|
|
|
|
#include "qdev.h"
|
|
#include "block.h"
|
|
#include "block_int.h"
|
|
|
|
#define MAX_SCSI_DEVS 255
|
|
|
|
#define SCSI_CMD_BUF_SIZE 16
|
|
|
|
/* scsi-disk.c */
|
|
enum scsi_reason {
|
|
SCSI_REASON_DONE, /* Command complete. */
|
|
SCSI_REASON_DATA /* Transfer complete, more data required. */
|
|
};
|
|
|
|
typedef struct SCSIBus SCSIBus;
|
|
typedef struct SCSIBusOps SCSIBusOps;
|
|
typedef struct SCSIDevice SCSIDevice;
|
|
typedef struct SCSIDeviceInfo SCSIDeviceInfo;
|
|
typedef struct SCSIRequest SCSIRequest;
|
|
|
|
enum SCSIXferMode {
|
|
SCSI_XFER_NONE, /* TEST_UNIT_READY, ... */
|
|
SCSI_XFER_FROM_DEV, /* READ, INQUIRY, MODE_SENSE, ... */
|
|
SCSI_XFER_TO_DEV, /* WRITE, MODE_SELECT, ... */
|
|
};
|
|
|
|
struct SCSIRequest {
|
|
SCSIBus *bus;
|
|
SCSIDevice *dev;
|
|
uint32_t refcount;
|
|
uint32_t tag;
|
|
uint32_t lun;
|
|
uint32_t status;
|
|
struct {
|
|
uint8_t buf[SCSI_CMD_BUF_SIZE];
|
|
int len;
|
|
size_t xfer;
|
|
uint64_t lba;
|
|
enum SCSIXferMode mode;
|
|
} cmd;
|
|
BlockDriverAIOCB *aiocb;
|
|
bool enqueued;
|
|
QTAILQ_ENTRY(SCSIRequest) next;
|
|
};
|
|
|
|
struct SCSIDevice
|
|
{
|
|
DeviceState qdev;
|
|
uint32_t id;
|
|
BlockConf conf;
|
|
SCSIDeviceInfo *info;
|
|
QTAILQ_HEAD(, SCSIRequest) requests;
|
|
int blocksize;
|
|
int type;
|
|
};
|
|
|
|
/* 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 */
|
|
typedef int (*scsi_qdev_initfn)(SCSIDevice *dev);
|
|
struct SCSIDeviceInfo {
|
|
DeviceInfo qdev;
|
|
scsi_qdev_initfn init;
|
|
void (*destroy)(SCSIDevice *s);
|
|
SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun);
|
|
void (*free_req)(SCSIRequest *req);
|
|
int32_t (*send_command)(SCSIRequest *req, uint8_t *buf);
|
|
void (*read_data)(SCSIRequest *req);
|
|
int (*write_data)(SCSIRequest *req);
|
|
void (*cancel_io)(SCSIRequest *req);
|
|
uint8_t *(*get_buf)(SCSIRequest *req);
|
|
};
|
|
|
|
struct SCSIBusOps {
|
|
void (*complete)(SCSIRequest *req, int reason, uint32_t arg);
|
|
};
|
|
|
|
struct SCSIBus {
|
|
BusState qbus;
|
|
int busnr;
|
|
|
|
int tcq, ndev;
|
|
const SCSIBusOps *ops;
|
|
|
|
SCSIDevice *devs[MAX_SCSI_DEVS];
|
|
};
|
|
|
|
void scsi_bus_new(SCSIBus *bus, DeviceState *host, int tcq, int ndev,
|
|
const SCSIBusOps *ops);
|
|
void scsi_qdev_register(SCSIDeviceInfo *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 scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
|
|
|
|
SCSIRequest *scsi_req_alloc(size_t size, SCSIDevice *d, uint32_t tag, uint32_t lun);
|
|
void scsi_req_enqueue(SCSIRequest *req);
|
|
void scsi_req_free(SCSIRequest *req);
|
|
void scsi_req_dequeue(SCSIRequest *req);
|
|
SCSIRequest *scsi_req_ref(SCSIRequest *req);
|
|
void scsi_req_unref(SCSIRequest *req);
|
|
|
|
int scsi_req_parse(SCSIRequest *req, uint8_t *buf);
|
|
void scsi_req_print(SCSIRequest *req);
|
|
void scsi_req_data(SCSIRequest *req, int len);
|
|
void scsi_req_complete(SCSIRequest *req);
|
|
|
|
#endif
|