#include "block.h"
#include "scsi-disk.h"
-#ifndef __linux__
-
-SCSIDevice *scsi_generic_init(BlockDriverState *bdrv, int tcq,
- scsi_completionfn completion, void *opaque)
-{
- return NULL;
-}
-
-#else /* __linux__ */
+#ifdef __linux__
//#define DEBUG_SCSI
#ifdef DEBUG_SCSI
-#define DPRINTF(fmt, args...) \
-do { printf("scsi-generic: " fmt , ##args); } while (0)
+#define DPRINTF(fmt, ...) \
+do { printf("scsi-generic: " fmt , ## __VA_ARGS__); } while (0)
#else
-#define DPRINTF(fmt, args...) do {} while(0)
+#define DPRINTF(fmt, ...) do {} while(0)
#endif
-#define BADF(fmt, args...) \
-do { fprintf(stderr, "scsi-generic: " fmt , ##args); } while (0)
+#define BADF(fmt, ...) \
+do { fprintf(stderr, "scsi-generic: " fmt , ## __VA_ARGS__); } while (0)
#include <stdio.h>
#include <sys/types.h>
#include <scsi/sg.h>
#include <scsi/scsi.h>
+#define REWIND 0x01
+#define REPORT_DENSITY_SUPPORT 0x44
#define LOAD_UNLOAD 0xa6
#define SET_CD_SPEED 0xbb
#define BLANK 0xa1
#define SCSI_CMD_BUF_SIZE 16
-#define SCSI_SENSE_BUF_SIZE 32
+#define SCSI_SENSE_BUF_SIZE 96
#define SG_ERR_DRIVER_TIMEOUT 0x06
#define SG_ERR_DRIVER_SENSE 0x08
#define MAX_UINT ((unsigned int)-1)
#endif
+typedef struct SCSIGenericState SCSIGenericState;
+
typedef struct SCSIRequest {
BlockDriverAIOCB *aiocb;
struct SCSIRequest *next;
- SCSIDeviceState *dev;
+ SCSIBus *bus;
+ SCSIGenericState *dev;
uint32_t tag;
uint8_t cmd[SCSI_CMD_BUF_SIZE];
int cmdlen;
sg_io_hdr_t io_header;
} SCSIRequest;
-struct SCSIDeviceState
+struct SCSIGenericState
{
+ SCSIDevice qdev;
SCSIRequest *requests;
- BlockDriverState *bdrv;
+ DriveInfo *dinfo;
+ int type;
int blocksize;
int lun;
- scsi_completionfn completion;
- void *opaque;
int driver_status;
uint8_t sensebuf[SCSI_SENSE_BUF_SIZE];
+ uint8_t senselen;
};
/* Global pool of SCSIRequest structures. */
static SCSIRequest *free_requests = NULL;
-static SCSIRequest *scsi_new_request(SCSIDeviceState *s, uint32_t tag)
+static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag)
{
+ SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d);
SCSIRequest *r;
if (free_requests) {
r->buf = NULL;
r->buflen = 0;
}
+ r->bus = scsi_bus_from_device(d);
r->dev = s;
r->tag = tag;
memset(r->cmd, 0, sizeof(r->cmd));
static void scsi_remove_request(SCSIRequest *r)
{
SCSIRequest *last;
- SCSIDeviceState *s = r->dev;
+ SCSIGenericState *s = r->dev;
if (s->requests == r) {
s->requests = r->next;
free_requests = r;
}
-static SCSIRequest *scsi_find_request(SCSIDeviceState *s, uint32_t tag)
+static SCSIRequest *scsi_find_request(SCSIGenericState *s, uint32_t tag)
{
SCSIRequest *r;
static void scsi_command_complete(void *opaque, int ret)
{
SCSIRequest *r = (SCSIRequest *)opaque;
- SCSIDeviceState *s = r->dev;
+ SCSIGenericState *s = r->dev;
uint32_t tag;
- int sense;
+ int status;
s->driver_status = r->io_header.driver_status;
+ if (s->driver_status & SG_ERR_DRIVER_SENSE)
+ s->senselen = r->io_header.sb_len_wr;
+
if (ret != 0)
- sense = HARDWARE_ERROR;
+ status = BUSY << 1;
else {
if (s->driver_status & SG_ERR_DRIVER_TIMEOUT) {
- sense = HARDWARE_ERROR;
+ status = BUSY << 1;
BADF("Driver Timeout\n");
- } else if ((s->driver_status & SG_ERR_DRIVER_SENSE) == 0)
- sense = NO_SENSE;
+ } else if (r->io_header.status)
+ status = r->io_header.status;
+ else if (s->driver_status & SG_ERR_DRIVER_SENSE)
+ status = CHECK_CONDITION << 1;
else
- sense = s->sensebuf[2] & 0x0f;
+ status = GOOD << 1;
}
-
- DPRINTF("Command complete 0x%p tag=0x%x sense=%d\n", r, r->tag, sense);
+ DPRINTF("Command complete 0x%p tag=0x%x status=%d\n",
+ r, r->tag, status);
tag = r->tag;
scsi_remove_request(r);
- s->completion(s->opaque, SCSI_REASON_DONE, tag, sense);
+ r->bus->complete(r->bus, SCSI_REASON_DONE, tag, status);
}
/* Cancel a pending data transfer. */
static void scsi_cancel_io(SCSIDevice *d, uint32_t tag)
{
DPRINTF("scsi_cancel_io 0x%x\n", tag);
- SCSIDeviceState *s = d->state;
+ SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d);
SCSIRequest *r;
DPRINTF("Cancel tag=0x%x\n", tag);
r = scsi_find_request(s, tag);
SCSIRequest *r, int direction,
BlockDriverCompletionFunc *complete)
{
-
r->io_header.interface_id = 'S';
r->io_header.dxfer_direction = direction;
r->io_header.dxferp = r->buf;
r->io_header.usr_ptr = r;
r->io_header.flags |= SG_FLAG_DIRECT_IO;
- if (bdrv_pwrite(bdrv, -1, &r->io_header, sizeof(r->io_header)) == -1) {
- BADF("execute_command: write failed ! (%d)\n", errno);
- return -1;
- }
- if (complete == NULL) {
- int ret;
- r->aiocb = NULL;
- while ((ret = bdrv_pread(bdrv, -1, &r->io_header,
- sizeof(r->io_header))) == -1 &&
- errno == EINTR);
- if (ret == -1) {
- BADF("execute_command: read failed !\n");
- return -1;
- }
- return 0;
- }
-
- r->aiocb = bdrv_aio_read(bdrv, 0, (uint8_t*)&r->io_header,
- -(int64_t)sizeof(r->io_header), complete, r);
+ r->aiocb = bdrv_aio_ioctl(bdrv, SG_IO, &r->io_header, complete, r);
if (r->aiocb == NULL) {
BADF("execute_command: read failed !\n");
return -1;
static void scsi_read_complete(void * opaque, int ret)
{
SCSIRequest *r = (SCSIRequest *)opaque;
- SCSIDeviceState *s = r->dev;
int len;
if (ret) {
DPRINTF("Data ready tag=0x%x len=%d\n", r->tag, len);
r->len = -1;
- s->completion(s->opaque, SCSI_REASON_DATA, r->tag, len);
+ r->bus->complete(r->bus, SCSI_REASON_DATA, r->tag, len);
+ if (len == 0)
+ scsi_command_complete(r, 0);
}
/* Read more data from scsi device into buffer. */
static void scsi_read_data(SCSIDevice *d, uint32_t tag)
{
- SCSIDeviceState *s = d->state;
+ SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d);
SCSIRequest *r;
int ret;
if (r->cmd[0] == REQUEST_SENSE && s->driver_status & SG_ERR_DRIVER_SENSE)
{
- memcpy(r->buf, s->sensebuf, 16);
+ s->senselen = MIN(r->len, s->senselen);
+ memcpy(r->buf, s->sensebuf, s->senselen);
r->io_header.driver_status = 0;
+ r->io_header.status = 0;
+ r->io_header.dxfer_len = s->senselen;
r->len = -1;
- s->completion(s->opaque, SCSI_REASON_DATA, r->tag, 16);
+ DPRINTF("Data ready tag=0x%x len=%d\n", r->tag, s->senselen);
+ DPRINTF("Sense: %d %d %d %d %d %d %d %d\n",
+ r->buf[0], r->buf[1], r->buf[2], r->buf[3],
+ r->buf[4], r->buf[5], r->buf[6], r->buf[7]);
+ r->bus->complete(r->bus, SCSI_REASON_DATA, r->tag, s->senselen);
return;
}
- ret = execute_command(s->bdrv, r, SG_DXFER_FROM_DEV, scsi_read_complete);
+ ret = execute_command(s->dinfo->bdrv, r, SG_DXFER_FROM_DEV, scsi_read_complete);
if (ret == -1) {
scsi_command_complete(r, -EINVAL);
return;
return;
}
+ if (r->cmd[0] == MODE_SELECT && r->cmd[4] == 12 &&
+ r->dev->type == TYPE_TAPE) {
+ r->dev->blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11];
+ DPRINTF("block size %d\n", r->dev->blocksize);
+ }
+
scsi_command_complete(r, ret);
}
The transfer may complete asynchronously. */
static int scsi_write_data(SCSIDevice *d, uint32_t tag)
{
- SCSIDeviceState *s = d->state;
+ SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d);
SCSIRequest *r;
int ret;
if (r->len == 0) {
r->len = r->buflen;
- s->completion(s->opaque, SCSI_REASON_DATA, r->tag, r->len);
+ r->bus->complete(r->bus, SCSI_REASON_DATA, r->tag, r->len);
return 0;
}
- ret = execute_command(s->bdrv, r, SG_DXFER_TO_DEV, scsi_write_complete);
+ ret = execute_command(s->dinfo->bdrv, r, SG_DXFER_TO_DEV, scsi_write_complete);
if (ret == -1) {
scsi_command_complete(r, -EINVAL);
return 1;
/* Return a pointer to the data buffer. */
static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
{
- SCSIDeviceState *s = d->state;
+ SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d);
SCSIRequest *r;
r = scsi_find_request(s, tag);
if (!r) {
case 0:
*len = cmd[4];
*cmdlen = 6;
+ /* length 0 means 256 blocks */
+ if (*len == 0)
+ *len = 256;
break;
case 1:
case 2:
case READ_12:
*len *= blocksize;
break;
+ case INQUIRY:
+ *len = cmd[4] | (cmd[3] << 8);
+ break;
+ }
+ return 0;
+}
+
+static int scsi_stream_length(uint8_t *cmd, int blocksize, int *cmdlen, uint32_t *len)
+{
+ switch(cmd[0]) {
+ /* stream commands */
+ case READ_6:
+ case READ_REVERSE:
+ case RECOVER_BUFFERED_DATA:
+ case WRITE_6:
+ *cmdlen = 6;
+ *len = cmd[4] | (cmd[3] << 8) | (cmd[2] << 16);
+ if (cmd[1] & 0x01) /* fixed */
+ *len *= blocksize;
+ break;
+ case REWIND:
+ case START_STOP:
+ *cmdlen = 6;
+ *len = 0;
+ cmd[1] = 0x01; /* force IMMED, otherwise qemu waits end of command */
+ break;
+ /* generic commands */
+ default:
+ return scsi_length(cmd, blocksize, cmdlen, len);
}
return 0;
}
static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
uint8_t *cmd, int lun)
{
- SCSIDeviceState *s = d->state;
- uint32_t len;
- int cmdlen;
+ SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d);
+ uint32_t len=0;
+ int cmdlen=0;
SCSIRequest *r;
+ SCSIBus *bus;
int ret;
- /* ??? Tags are not unique for different luns. We only implement a
- single lun, so this should not matter. */
+ if (s->type == TYPE_TAPE) {
+ if (scsi_stream_length(cmd, s->blocksize, &cmdlen, &len) == -1) {
+ BADF("Unsupported command length, command %x\n", cmd[0]);
+ return 0;
+ }
+ } else {
+ if (scsi_length(cmd, s->blocksize, &cmdlen, &len) == -1) {
+ BADF("Unsupported command length, command %x\n", cmd[0]);
+ return 0;
+ }
+ }
+
+ DPRINTF("Command: lun=%d tag=0x%x data=0x%02x len %d\n", lun, tag,
+ cmd[0], len);
- if (lun != s->lun || (cmd[1] >> 5) != s->lun) {
+ if (cmd[0] != REQUEST_SENSE &&
+ (lun != s->lun || (cmd[1] >> 5) != s->lun)) {
DPRINTF("Unimplemented LUN %d\n", lun ? lun : cmd[1] >> 5);
- s->completion(s->opaque, SCSI_REASON_DONE, tag, ILLEGAL_REQUEST);
- return 0;
- }
- if (scsi_length(cmd, s->blocksize, &cmdlen, &len) == -1) {
- BADF("Unsupported command length, command %x\n", cmd[0]);
+ s->sensebuf[0] = 0x70;
+ s->sensebuf[1] = 0x00;
+ s->sensebuf[2] = ILLEGAL_REQUEST;
+ s->sensebuf[3] = 0x00;
+ s->sensebuf[4] = 0x00;
+ s->sensebuf[5] = 0x00;
+ s->sensebuf[6] = 0x00;
+ s->senselen = 7;
+ s->driver_status = SG_ERR_DRIVER_SENSE;
+ bus = scsi_bus_from_device(d);
+ bus->complete(bus, SCSI_REASON_DONE, tag, CHECK_CONDITION << 1);
return 0;
}
- DPRINTF("Command: lun=%d tag=0x%x data=0x%02x len %d\n", lun, tag,
- cmd[0], len);
-
r = scsi_find_request(s, tag);
if (r) {
BADF("Tag 0x%x already in use %p\n", tag, r);
scsi_cancel_io(d, tag);
}
- r = scsi_new_request(s, tag);
+ r = scsi_new_request(d, tag);
memcpy(r->cmd, cmd, cmdlen);
r->cmdlen = cmdlen;
free(r->buf);
r->buflen = 0;
r->buf = NULL;
- ret = execute_command(s->bdrv, r, SG_DXFER_NONE, scsi_command_complete);
+ ret = execute_command(s->dinfo->bdrv, r, SG_DXFER_NONE, scsi_command_complete);
if (ret == -1) {
scsi_command_complete(r, -EINVAL);
return 0;
sg_io_hdr_t io_header;
int ret;
- memset(cmd, sizeof(cmd), 0);
- memset(buf, sizeof(buf), 0);
+ memset(cmd, 0, sizeof(cmd));
+ memset(buf, 0, sizeof(buf));
cmd[0] = READ_CAPACITY;
memset(&io_header, 0, sizeof(io_header));
io_header.sbp = sensebuf;
io_header.timeout = 6000; /* XXX */
- ret = bdrv_pwrite(bdrv, -1, &io_header, sizeof(io_header));
- if (ret == -1)
+ ret = bdrv_ioctl(bdrv, SG_IO, &io_header);
+ if (ret < 0)
return -1;
- while ((ret = bdrv_pread(bdrv, -1, &io_header, sizeof(io_header))) == -1 &&
- errno == EINTR);
+ return (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7];
+}
- if (ret == -1)
+static int get_stream_blocksize(BlockDriverState *bdrv)
+{
+ uint8_t cmd[6];
+ uint8_t buf[12];
+ uint8_t sensebuf[8];
+ sg_io_hdr_t io_header;
+ int ret;
+
+ memset(cmd, 0, sizeof(cmd));
+ memset(buf, 0, sizeof(buf));
+ cmd[0] = MODE_SENSE;
+ cmd[4] = sizeof(buf);
+
+ memset(&io_header, 0, sizeof(io_header));
+ io_header.interface_id = 'S';
+ io_header.dxfer_direction = SG_DXFER_FROM_DEV;
+ io_header.dxfer_len = sizeof(buf);
+ io_header.dxferp = buf;
+ io_header.cmdp = cmd;
+ io_header.cmd_len = sizeof(cmd);
+ io_header.mx_sb_len = sizeof(sensebuf);
+ io_header.sbp = sensebuf;
+ io_header.timeout = 6000; /* XXX */
+
+ ret = bdrv_ioctl(bdrv, SG_IO, &io_header);
+ if (ret < 0)
return -1;
- return (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7];
+ return (buf[9] << 16) | (buf[10] << 8) | buf[11];
}
static void scsi_destroy(SCSIDevice *d)
{
+ SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d);
SCSIRequest *r, *n;
- r = d->state->requests;
+ r = s->requests;
while (r) {
n = r->next;
qemu_free(r);
r = n;
}
- qemu_free(d->state);
qemu_free(d);
}
-SCSIDevice *scsi_generic_init(BlockDriverState *bdrv, int tcq,
- scsi_completionfn completion, void *opaque)
+static int scsi_generic_initfn(SCSIDevice *dev)
{
+ SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, dev);
int sg_version;
- SCSIDevice *d;
- SCSIDeviceState *s;
struct sg_scsi_id scsiid;
- /* check we are really using a /dev/sg* file */
+ if (!s->dinfo || !s->dinfo->bdrv) {
+ qemu_error("scsi-generic: drive property not set\n");
+ return -1;
+ }
- if (!bdrv_is_sg(bdrv))
- return NULL;
+ /* check we are really using a /dev/sg* file */
+ if (!bdrv_is_sg(s->dinfo->bdrv)) {
+ qemu_error("scsi-generic: not /dev/sg*\n");
+ return -1;
+ }
/* check we are using a driver managing SG_IO (version 3 and after */
-
- if (bdrv_ioctl(bdrv, SG_GET_VERSION_NUM, &sg_version) < 0 ||
- sg_version < 30000)
- return NULL;
+ if (bdrv_ioctl(s->dinfo->bdrv, SG_GET_VERSION_NUM, &sg_version) < 0 ||
+ sg_version < 30000) {
+ qemu_error("scsi-generic: scsi generic interface too old\n");
+ return -1;
+ }
/* get LUN of the /dev/sg? */
-
- if (bdrv_ioctl(bdrv, SG_GET_SCSI_ID, &scsiid))
- return NULL;
+ if (bdrv_ioctl(s->dinfo->bdrv, SG_GET_SCSI_ID, &scsiid)) {
+ qemu_error("scsi-generic: SG_GET_SCSI_ID ioctl failed\n");
+ return -1;
+ }
/* define device state */
-
- s = (SCSIDeviceState *)qemu_mallocz(sizeof(SCSIDeviceState));
- s->bdrv = bdrv;
- s->requests = NULL;
- s->completion = completion;
- s->opaque = opaque;
s->lun = scsiid.lun;
- s->blocksize = get_blocksize(s->bdrv);
+ DPRINTF("LUN %d\n", s->lun);
+ s->type = scsiid.scsi_type;
+ DPRINTF("device type %d\n", s->type);
+ if (s->type == TYPE_TAPE) {
+ s->blocksize = get_stream_blocksize(s->dinfo->bdrv);
+ if (s->blocksize == -1)
+ s->blocksize = 0;
+ } else {
+ s->blocksize = get_blocksize(s->dinfo->bdrv);
+ /* removable media returns 0 if not present */
+ if (s->blocksize <= 0) {
+ if (s->type == TYPE_ROM || s->type == TYPE_WORM)
+ s->blocksize = 2048;
+ else
+ s->blocksize = 512;
+ }
+ }
+ DPRINTF("block size %d\n", s->blocksize);
s->driver_status = 0;
memset(s->sensebuf, 0, sizeof(s->sensebuf));
- /* removable media returns 0 if not present */
- if (s->blocksize <= 0)
- s->blocksize = 2048;
-
- /* define function to manage device */
-
- d = (SCSIDevice *)qemu_mallocz(sizeof(SCSIDevice));
- d->state = s;
- d->destroy = scsi_destroy;
- d->send_command = scsi_send_command;
- d->read_data = scsi_read_data;
- d->write_data = scsi_write_data;
- d->cancel_io = scsi_cancel_io;
- d->get_buf = scsi_get_buf;
-
- return d;
+ return 0;
}
+
+static SCSIDeviceInfo scsi_generic_info = {
+ .qdev.name = "scsi-generic",
+ .qdev.desc = "pass through generic scsi device (/dev/sg*)",
+ .qdev.size = sizeof(SCSIGenericState),
+ .init = scsi_generic_initfn,
+ .destroy = scsi_destroy,
+ .send_command = scsi_send_command,
+ .read_data = scsi_read_data,
+ .write_data = scsi_write_data,
+ .cancel_io = scsi_cancel_io,
+ .get_buf = scsi_get_buf,
+ .qdev.props = (Property[]) {
+ DEFINE_PROP_DRIVE("drive", SCSIGenericState, dinfo),
+ DEFINE_PROP_END_OF_LIST(),
+ },
+};
+
+static void scsi_generic_register_devices(void)
+{
+ scsi_qdev_register(&scsi_generic_info);
+}
+device_init(scsi_generic_register_devices)
+
#endif /* __linux__ */
projects / qemu / blobdiff