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scsi-disk.c
1309 lines (1173 loc) · 38.8 KB
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scsi-disk.c
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/*
* SCSI Device emulation
*
* Copyright (c) 2006 CodeSourcery.
* Based on code by Fabrice Bellard
*
* Written by Paul Brook
* Modifications:
* 2009-Dec-12 Artyom Tarasenko : implemented stamdard inquiry for the case
* when the allocation length of CDB is smaller
* than 36.
* 2009-Oct-13 Artyom Tarasenko : implemented the block descriptor in the
* MODE SENSE response.
*
* This code is licenced under the LGPL.
*
* Note that this file only handles the SCSI architecture model and device
* commands. Emulation of interface/link layer protocols is handled by
* the host adapter emulator.
*/
//#define DEBUG_SCSI
#ifdef DEBUG_SCSI
#define DPRINTF(fmt, ...) \
do { printf("scsi-disk: " fmt , ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) do {} while(0)
#endif
#define BADF(fmt, ...) \
do { fprintf(stderr, "scsi-disk: " fmt , ## __VA_ARGS__); } while (0)
#include "qemu-common.h"
#include "qemu-error.h"
#include "scsi.h"
#include "scsi-defs.h"
#include "sysemu.h"
#include "blockdev.h"
#define SCSI_DMA_BUF_SIZE 131072
#define SCSI_MAX_INQUIRY_LEN 256
#define SCSI_REQ_STATUS_RETRY 0x01
#define SCSI_REQ_STATUS_RETRY_TYPE_MASK 0x06
#define SCSI_REQ_STATUS_RETRY_READ 0x00
#define SCSI_REQ_STATUS_RETRY_WRITE 0x02
#define SCSI_REQ_STATUS_RETRY_FLUSH 0x04
typedef struct SCSIDiskState SCSIDiskState;
typedef struct SCSISense {
uint8_t key;
} SCSISense;
typedef struct SCSIDiskReq {
SCSIRequest req;
/* ??? We should probably keep track of whether the data transfer is
a read or a write. Currently we rely on the host getting it right. */
/* Both sector and sector_count are in terms of qemu 512 byte blocks. */
uint64_t sector;
uint32_t sector_count;
struct iovec iov;
QEMUIOVector qiov;
uint32_t status;
} SCSIDiskReq;
struct SCSIDiskState
{
SCSIDevice qdev;
BlockDriverState *bs;
/* The qemu block layer uses a fixed 512 byte sector size.
This is the number of 512 byte blocks in a single scsi sector. */
int cluster_size;
uint32_t removable;
uint64_t max_lba;
QEMUBH *bh;
char *version;
char *serial;
SCSISense sense;
};
static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type);
static int scsi_disk_emulate_command(SCSIDiskReq *r, uint8_t *outbuf);
static SCSIDiskReq *scsi_new_request(SCSIDiskState *s, uint32_t tag,
uint32_t lun)
{
SCSIRequest *req;
SCSIDiskReq *r;
req = scsi_req_alloc(sizeof(SCSIDiskReq), &s->qdev, tag, lun);
r = DO_UPCAST(SCSIDiskReq, req, req);
r->iov.iov_base = qemu_blockalign(s->bs, SCSI_DMA_BUF_SIZE);
return r;
}
static void scsi_remove_request(SCSIDiskReq *r)
{
qemu_vfree(r->iov.iov_base);
scsi_req_free(&r->req);
}
static SCSIDiskReq *scsi_find_request(SCSIDiskState *s, uint32_t tag)
{
return DO_UPCAST(SCSIDiskReq, req, scsi_req_find(&s->qdev, tag));
}
static void scsi_disk_clear_sense(SCSIDiskState *s)
{
memset(&s->sense, 0, sizeof(s->sense));
}
static void scsi_disk_set_sense(SCSIDiskState *s, uint8_t key)
{
s->sense.key = key;
}
static void scsi_req_set_status(SCSIDiskReq *r, int status, int sense_code)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
r->req.status = status;
scsi_disk_set_sense(s, sense_code);
}
/* Helper function for command completion. */
static void scsi_command_complete(SCSIDiskReq *r, int status, int sense)
{
DPRINTF("Command complete tag=0x%x status=%d sense=%d\n",
r->req.tag, status, sense);
scsi_req_set_status(r, status, sense);
scsi_req_complete(&r->req);
scsi_remove_request(r);
}
/* Cancel a pending data transfer. */
static void scsi_cancel_io(SCSIDevice *d, uint32_t tag)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
SCSIDiskReq *r;
DPRINTF("Cancel tag=0x%x\n", tag);
r = scsi_find_request(s, tag);
if (r) {
if (r->req.aiocb)
bdrv_aio_cancel(r->req.aiocb);
r->req.aiocb = NULL;
scsi_remove_request(r);
}
}
static void scsi_read_complete(void * opaque, int ret)
{
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
int n;
r->req.aiocb = NULL;
if (ret) {
if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_READ)) {
return;
}
}
DPRINTF("Data ready tag=0x%x len=%zd\n", r->req.tag, r->iov.iov_len);
n = r->iov.iov_len / 512;
r->sector += n;
r->sector_count -= n;
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len);
}
static void scsi_read_request(SCSIDiskReq *r)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
uint32_t n;
if (r->sector_count == (uint32_t)-1) {
DPRINTF("Read buf_len=%zd\n", r->iov.iov_len);
r->sector_count = 0;
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len);
return;
}
DPRINTF("Read sector_count=%d\n", r->sector_count);
if (r->sector_count == 0) {
scsi_command_complete(r, GOOD, NO_SENSE);
return;
}
/* No data transfer may already be in progress */
assert(r->req.aiocb == NULL);
n = r->sector_count;
if (n > SCSI_DMA_BUF_SIZE / 512)
n = SCSI_DMA_BUF_SIZE / 512;
r->iov.iov_len = n * 512;
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
r->req.aiocb = bdrv_aio_readv(s->bs, r->sector, &r->qiov, n,
scsi_read_complete, r);
if (r->req.aiocb == NULL) {
scsi_read_complete(r, -EIO);
}
}
/* Read more data from scsi device into buffer. */
static void scsi_read_data(SCSIDevice *d, uint32_t tag)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
SCSIDiskReq *r;
r = scsi_find_request(s, tag);
if (!r) {
BADF("Bad read tag 0x%x\n", tag);
/* ??? This is the wrong error. */
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR);
return;
}
scsi_read_request(r);
}
static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type)
{
int is_read = (type == SCSI_REQ_STATUS_RETRY_READ);
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
BlockErrorAction action = bdrv_get_on_error(s->bs, is_read);
if (action == BLOCK_ERR_IGNORE) {
bdrv_mon_event(s->bs, BDRV_ACTION_IGNORE, is_read);
return 0;
}
if ((error == ENOSPC && action == BLOCK_ERR_STOP_ENOSPC)
|| action == BLOCK_ERR_STOP_ANY) {
type &= SCSI_REQ_STATUS_RETRY_TYPE_MASK;
r->status |= SCSI_REQ_STATUS_RETRY | type;
bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read);
vm_stop(0);
} else {
if (type == SCSI_REQ_STATUS_RETRY_READ) {
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, 0);
}
scsi_command_complete(r, CHECK_CONDITION,
HARDWARE_ERROR);
bdrv_mon_event(s->bs, BDRV_ACTION_REPORT, is_read);
}
return 1;
}
static void scsi_write_complete(void * opaque, int ret)
{
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
uint32_t len;
uint32_t n;
r->req.aiocb = NULL;
if (ret) {
if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_WRITE)) {
return;
}
}
n = r->iov.iov_len / 512;
r->sector += n;
r->sector_count -= n;
if (r->sector_count == 0) {
scsi_command_complete(r, GOOD, NO_SENSE);
} else {
len = r->sector_count * 512;
if (len > SCSI_DMA_BUF_SIZE) {
len = SCSI_DMA_BUF_SIZE;
}
r->iov.iov_len = len;
DPRINTF("Write complete tag=0x%x more=%d\n", r->req.tag, len);
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, len);
}
}
static void scsi_write_request(SCSIDiskReq *r)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
uint32_t n;
/* No data transfer may already be in progress */
assert(r->req.aiocb == NULL);
n = r->iov.iov_len / 512;
if (n) {
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
r->req.aiocb = bdrv_aio_writev(s->bs, r->sector, &r->qiov, n,
scsi_write_complete, r);
if (r->req.aiocb == NULL) {
scsi_write_complete(r, -EIO);
}
} else {
/* Invoke completion routine to fetch data from host. */
scsi_write_complete(r, 0);
}
}
/* Write data to a scsi device. Returns nonzero on failure.
The transfer may complete asynchronously. */
static int scsi_write_data(SCSIDevice *d, uint32_t tag)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
SCSIDiskReq *r;
DPRINTF("Write data tag=0x%x\n", tag);
r = scsi_find_request(s, tag);
if (!r) {
BADF("Bad write tag 0x%x\n", tag);
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR);
return 1;
}
scsi_write_request(r);
return 0;
}
static void scsi_dma_restart_bh(void *opaque)
{
SCSIDiskState *s = opaque;
SCSIRequest *req;
SCSIDiskReq *r;
qemu_bh_delete(s->bh);
s->bh = NULL;
QTAILQ_FOREACH(req, &s->qdev.requests, next) {
r = DO_UPCAST(SCSIDiskReq, req, req);
if (r->status & SCSI_REQ_STATUS_RETRY) {
int status = r->status;
int ret;
r->status &=
~(SCSI_REQ_STATUS_RETRY | SCSI_REQ_STATUS_RETRY_TYPE_MASK);
switch (status & SCSI_REQ_STATUS_RETRY_TYPE_MASK) {
case SCSI_REQ_STATUS_RETRY_READ:
scsi_read_request(r);
break;
case SCSI_REQ_STATUS_RETRY_WRITE:
scsi_write_request(r);
break;
case SCSI_REQ_STATUS_RETRY_FLUSH:
ret = scsi_disk_emulate_command(r, r->iov.iov_base);
if (ret == 0) {
scsi_command_complete(r, GOOD, NO_SENSE);
}
}
}
}
}
static void scsi_dma_restart_cb(void *opaque, int running, int reason)
{
SCSIDiskState *s = opaque;
if (!running)
return;
if (!s->bh) {
s->bh = qemu_bh_new(scsi_dma_restart_bh, s);
qemu_bh_schedule(s->bh);
}
}
/* Return a pointer to the data buffer. */
static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
SCSIDiskReq *r;
r = scsi_find_request(s, tag);
if (!r) {
BADF("Bad buffer tag 0x%x\n", tag);
return NULL;
}
return (uint8_t *)r->iov.iov_base;
}
static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
int buflen = 0;
if (req->cmd.buf[1] & 0x2) {
/* Command support data - optional, not implemented */
BADF("optional INQUIRY command support request not implemented\n");
return -1;
}
if (req->cmd.buf[1] & 0x1) {
/* Vital product data */
uint8_t page_code = req->cmd.buf[2];
if (req->cmd.xfer < 4) {
BADF("Error: Inquiry (EVPD[%02X]) buffer size %zd is "
"less than 4\n", page_code, req->cmd.xfer);
return -1;
}
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
outbuf[buflen++] = 5;
} else {
outbuf[buflen++] = 0;
}
outbuf[buflen++] = page_code ; // this page
outbuf[buflen++] = 0x00;
switch (page_code) {
case 0x00: /* Supported page codes, mandatory */
{
int pages;
DPRINTF("Inquiry EVPD[Supported pages] "
"buffer size %zd\n", req->cmd.xfer);
pages = buflen++;
outbuf[buflen++] = 0x00; // list of supported pages (this page)
outbuf[buflen++] = 0x80; // unit serial number
outbuf[buflen++] = 0x83; // device identification
if (bdrv_get_type_hint(s->bs) != BDRV_TYPE_CDROM) {
outbuf[buflen++] = 0xb0; // block limits
outbuf[buflen++] = 0xb2; // thin provisioning
}
outbuf[pages] = buflen - pages - 1; // number of pages
break;
}
case 0x80: /* Device serial number, optional */
{
int l = strlen(s->serial);
if (l > req->cmd.xfer)
l = req->cmd.xfer;
if (l > 20)
l = 20;
DPRINTF("Inquiry EVPD[Serial number] "
"buffer size %zd\n", req->cmd.xfer);
outbuf[buflen++] = l;
memcpy(outbuf+buflen, s->serial, l);
buflen += l;
break;
}
case 0x83: /* Device identification page, mandatory */
{
int max_len = 255 - 8;
int id_len = strlen(bdrv_get_device_name(s->bs));
if (id_len > max_len)
id_len = max_len;
DPRINTF("Inquiry EVPD[Device identification] "
"buffer size %zd\n", req->cmd.xfer);
outbuf[buflen++] = 4 + id_len;
outbuf[buflen++] = 0x2; // ASCII
outbuf[buflen++] = 0; // not officially assigned
outbuf[buflen++] = 0; // reserved
outbuf[buflen++] = id_len; // length of data following
memcpy(outbuf+buflen, bdrv_get_device_name(s->bs), id_len);
buflen += id_len;
break;
}
case 0xb0: /* block limits */
{
unsigned int unmap_sectors =
s->qdev.conf.discard_granularity / s->qdev.blocksize;
unsigned int min_io_size =
s->qdev.conf.min_io_size / s->qdev.blocksize;
unsigned int opt_io_size =
s->qdev.conf.opt_io_size / s->qdev.blocksize;
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
DPRINTF("Inquiry (EVPD[%02X] not supported for CDROM\n",
page_code);
return -1;
}
/* required VPD size with unmap support */
outbuf[3] = buflen = 0x3c;
memset(outbuf + 4, 0, buflen - 4);
/* optimal transfer length granularity */
outbuf[6] = (min_io_size >> 8) & 0xff;
outbuf[7] = min_io_size & 0xff;
/* optimal transfer length */
outbuf[12] = (opt_io_size >> 24) & 0xff;
outbuf[13] = (opt_io_size >> 16) & 0xff;
outbuf[14] = (opt_io_size >> 8) & 0xff;
outbuf[15] = opt_io_size & 0xff;
/* optimal unmap granularity */
outbuf[28] = (unmap_sectors >> 24) & 0xff;
outbuf[29] = (unmap_sectors >> 16) & 0xff;
outbuf[30] = (unmap_sectors >> 8) & 0xff;
outbuf[31] = unmap_sectors & 0xff;
break;
}
case 0xb2: /* thin provisioning */
{
outbuf[3] = buflen = 8;
outbuf[4] = 0;
outbuf[5] = 0x40; /* write same with unmap supported */
outbuf[6] = 0;
outbuf[7] = 0;
break;
}
default:
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
"buffer size %zd\n", page_code, req->cmd.xfer);
return -1;
}
/* done with EVPD */
return buflen;
}
/* Standard INQUIRY data */
if (req->cmd.buf[2] != 0) {
BADF("Error: Inquiry (STANDARD) page or code "
"is non-zero [%02X]\n", req->cmd.buf[2]);
return -1;
}
/* PAGE CODE == 0 */
if (req->cmd.xfer < 5) {
BADF("Error: Inquiry (STANDARD) buffer size %zd "
"is less than 5\n", req->cmd.xfer);
return -1;
}
buflen = req->cmd.xfer;
if (buflen > SCSI_MAX_INQUIRY_LEN)
buflen = SCSI_MAX_INQUIRY_LEN;
memset(outbuf, 0, buflen);
if (req->lun || req->cmd.buf[1] >> 5) {
outbuf[0] = 0x7f; /* LUN not supported */
return buflen;
}
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
outbuf[0] = 5;
outbuf[1] = 0x80;
memcpy(&outbuf[16], "QEMU CD-ROM ", 16);
} else {
outbuf[0] = 0;
outbuf[1] = s->removable ? 0x80 : 0;
memcpy(&outbuf[16], "QEMU HARDDISK ", 16);
}
memcpy(&outbuf[8], "QEMU ", 8);
memset(&outbuf[32], 0, 4);
memcpy(&outbuf[32], s->version, MIN(4, strlen(s->version)));
/*
* We claim conformance to SPC-3, which is required for guests
* to ask for modern features like READ CAPACITY(16) or the
* block characteristics VPD page by default. Not all of SPC-3
* is actually implemented, but we're good enough.
*/
outbuf[2] = 5;
outbuf[3] = 2; /* Format 2 */
if (buflen > 36) {
outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */
} else {
/* If the allocation length of CDB is too small,
the additional length is not adjusted */
outbuf[4] = 36 - 5;
}
/* Sync data transfer and TCQ. */
outbuf[7] = 0x10 | (req->bus->tcq ? 0x02 : 0);
return buflen;
}
static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p,
int page_control)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
BlockDriverState *bdrv = s->bs;
int cylinders, heads, secs;
/*
* If Changeable Values are requested, a mask denoting those mode parameters
* that are changeable shall be returned. As we currently don't support
* parameter changes via MODE_SELECT all bits are returned set to zero.
* The buffer was already menset to zero by the caller of this function.
*/
switch (page) {
case 4: /* Rigid disk device geometry page. */
p[0] = 4;
p[1] = 0x16;
if (page_control == 1) { /* Changeable Values */
return p[1] + 2;
}
/* if a geometry hint is available, use it */
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs);
p[2] = (cylinders >> 16) & 0xff;
p[3] = (cylinders >> 8) & 0xff;
p[4] = cylinders & 0xff;
p[5] = heads & 0xff;
/* Write precomp start cylinder, disabled */
p[6] = (cylinders >> 16) & 0xff;
p[7] = (cylinders >> 8) & 0xff;
p[8] = cylinders & 0xff;
/* Reduced current start cylinder, disabled */
p[9] = (cylinders >> 16) & 0xff;
p[10] = (cylinders >> 8) & 0xff;
p[11] = cylinders & 0xff;
/* Device step rate [ns], 200ns */
p[12] = 0;
p[13] = 200;
/* Landing zone cylinder */
p[14] = 0xff;
p[15] = 0xff;
p[16] = 0xff;
/* Medium rotation rate [rpm], 5400 rpm */
p[20] = (5400 >> 8) & 0xff;
p[21] = 5400 & 0xff;
return p[1] + 2;
case 5: /* Flexible disk device geometry page. */
p[0] = 5;
p[1] = 0x1e;
if (page_control == 1) { /* Changeable Values */
return p[1] + 2;
}
/* Transfer rate [kbit/s], 5Mbit/s */
p[2] = 5000 >> 8;
p[3] = 5000 & 0xff;
/* if a geometry hint is available, use it */
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs);
p[4] = heads & 0xff;
p[5] = secs & 0xff;
p[6] = s->cluster_size * 2;
p[8] = (cylinders >> 8) & 0xff;
p[9] = cylinders & 0xff;
/* Write precomp start cylinder, disabled */
p[10] = (cylinders >> 8) & 0xff;
p[11] = cylinders & 0xff;
/* Reduced current start cylinder, disabled */
p[12] = (cylinders >> 8) & 0xff;
p[13] = cylinders & 0xff;
/* Device step rate [100us], 100us */
p[14] = 0;
p[15] = 1;
/* Device step pulse width [us], 1us */
p[16] = 1;
/* Device head settle delay [100us], 100us */
p[17] = 0;
p[18] = 1;
/* Motor on delay [0.1s], 0.1s */
p[19] = 1;
/* Motor off delay [0.1s], 0.1s */
p[20] = 1;
/* Medium rotation rate [rpm], 5400 rpm */
p[28] = (5400 >> 8) & 0xff;
p[29] = 5400 & 0xff;
return p[1] + 2;
case 8: /* Caching page. */
p[0] = 8;
p[1] = 0x12;
if (page_control == 1) { /* Changeable Values */
return p[1] + 2;
}
if (bdrv_enable_write_cache(s->bs)) {
p[2] = 4; /* WCE */
}
return p[1] + 2;
case 0x2a: /* CD Capabilities and Mechanical Status page. */
if (bdrv_get_type_hint(bdrv) != BDRV_TYPE_CDROM)
return 0;
p[0] = 0x2a;
p[1] = 0x14;
if (page_control == 1) { /* Changeable Values */
return p[1] + 2;
}
p[2] = 3; // CD-R & CD-RW read
p[3] = 0; // Writing not supported
p[4] = 0x7f; /* Audio, composite, digital out,
mode 2 form 1&2, multi session */
p[5] = 0xff; /* CD DA, DA accurate, RW supported,
RW corrected, C2 errors, ISRC,
UPC, Bar code */
p[6] = 0x2d | (bdrv_is_locked(s->bs)? 2 : 0);
/* Locking supported, jumper present, eject, tray */
p[7] = 0; /* no volume & mute control, no
changer */
p[8] = (50 * 176) >> 8; // 50x read speed
p[9] = (50 * 176) & 0xff;
p[10] = 0 >> 8; // No volume
p[11] = 0 & 0xff;
p[12] = 2048 >> 8; // 2M buffer
p[13] = 2048 & 0xff;
p[14] = (16 * 176) >> 8; // 16x read speed current
p[15] = (16 * 176) & 0xff;
p[18] = (16 * 176) >> 8; // 16x write speed
p[19] = (16 * 176) & 0xff;
p[20] = (16 * 176) >> 8; // 16x write speed current
p[21] = (16 * 176) & 0xff;
return p[1] + 2;
default:
return 0;
}
}
static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
uint64_t nb_sectors;
int page, dbd, buflen, page_control;
uint8_t *p;
uint8_t dev_specific_param;
dbd = req->cmd.buf[1] & 0x8;
page = req->cmd.buf[2] & 0x3f;
page_control = (req->cmd.buf[2] & 0xc0) >> 6;
DPRINTF("Mode Sense(%d) (page %d, xfer %zd, page_control %d)\n",
(req->cmd.buf[0] == MODE_SENSE) ? 6 : 10, page, req->cmd.xfer, page_control);
memset(outbuf, 0, req->cmd.xfer);
p = outbuf;
if (bdrv_is_read_only(s->bs)) {
dev_specific_param = 0x80; /* Readonly. */
} else {
dev_specific_param = 0x00;
}
if (req->cmd.buf[0] == MODE_SENSE) {
p[1] = 0; /* Default media type. */
p[2] = dev_specific_param;
p[3] = 0; /* Block descriptor length. */
p += 4;
} else { /* MODE_SENSE_10 */
p[2] = 0; /* Default media type. */
p[3] = dev_specific_param;
p[6] = p[7] = 0; /* Block descriptor length. */
p += 8;
}
bdrv_get_geometry(s->bs, &nb_sectors);
if (!dbd && nb_sectors) {
if (req->cmd.buf[0] == MODE_SENSE) {
outbuf[3] = 8; /* Block descriptor length */
} else { /* MODE_SENSE_10 */
outbuf[7] = 8; /* Block descriptor length */
}
nb_sectors /= s->cluster_size;
if (nb_sectors > 0xffffff)
nb_sectors = 0;
p[0] = 0; /* media density code */
p[1] = (nb_sectors >> 16) & 0xff;
p[2] = (nb_sectors >> 8) & 0xff;
p[3] = nb_sectors & 0xff;
p[4] = 0; /* reserved */
p[5] = 0; /* bytes 5-7 are the sector size in bytes */
p[6] = s->cluster_size * 2;
p[7] = 0;
p += 8;
}
if (page_control == 3) { /* Saved Values */
return -1; /* ILLEGAL_REQUEST */
}
switch (page) {
case 0x04:
case 0x05:
case 0x08:
case 0x2a:
p += mode_sense_page(req, page, p, page_control);
break;
case 0x3f:
p += mode_sense_page(req, 0x08, p, page_control);
p += mode_sense_page(req, 0x2a, p, page_control);
break;
default:
return -1; /* ILLEGAL_REQUEST */
}
buflen = p - outbuf;
/*
* The mode data length field specifies the length in bytes of the
* following data that is available to be transferred. The mode data
* length does not include itself.
*/
if (req->cmd.buf[0] == MODE_SENSE) {
outbuf[0] = buflen - 1;
} else { /* MODE_SENSE_10 */
outbuf[0] = ((buflen - 2) >> 8) & 0xff;
outbuf[1] = (buflen - 2) & 0xff;
}
if (buflen > req->cmd.xfer)
buflen = req->cmd.xfer;
return buflen;
}
static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
int start_track, format, msf, toclen;
uint64_t nb_sectors;
msf = req->cmd.buf[1] & 2;
format = req->cmd.buf[2] & 0xf;
start_track = req->cmd.buf[6];
bdrv_get_geometry(s->bs, &nb_sectors);
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1);
nb_sectors /= s->cluster_size;
switch (format) {
case 0:
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track);
break;
case 1:
/* multi session : only a single session defined */
toclen = 12;
memset(outbuf, 0, 12);
outbuf[1] = 0x0a;
outbuf[2] = 0x01;
outbuf[3] = 0x01;
break;
case 2:
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track);
break;
default:
return -1;
}
if (toclen > req->cmd.xfer)
toclen = req->cmd.xfer;
return toclen;
}
static int scsi_disk_emulate_command(SCSIDiskReq *r, uint8_t *outbuf)
{
SCSIRequest *req = &r->req;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
uint64_t nb_sectors;
int buflen = 0;
int ret;
switch (req->cmd.buf[0]) {
case TEST_UNIT_READY:
if (!bdrv_is_inserted(s->bs))
goto not_ready;
break;
case REQUEST_SENSE:
if (req->cmd.xfer < 4)
goto illegal_request;
memset(outbuf, 0, 4);
buflen = 4;
if (s->sense.key == NOT_READY && req->cmd.xfer >= 18) {
memset(outbuf, 0, 18);
buflen = 18;
outbuf[7] = 10;
/* asc 0x3a, ascq 0: Medium not present */
outbuf[12] = 0x3a;
outbuf[13] = 0;
}
outbuf[0] = 0xf0;
outbuf[1] = 0;
outbuf[2] = s->sense.key;
scsi_disk_clear_sense(s);
break;
case INQUIRY:
buflen = scsi_disk_emulate_inquiry(req, outbuf);
if (buflen < 0)
goto illegal_request;
break;
case MODE_SENSE:
case MODE_SENSE_10:
buflen = scsi_disk_emulate_mode_sense(req, outbuf);
if (buflen < 0)
goto illegal_request;
break;
case READ_TOC:
buflen = scsi_disk_emulate_read_toc(req, outbuf);
if (buflen < 0)
goto illegal_request;
break;
case RESERVE:
if (req->cmd.buf[1] & 1)
goto illegal_request;
break;
case RESERVE_10:
if (req->cmd.buf[1] & 3)
goto illegal_request;
break;
case RELEASE:
if (req->cmd.buf[1] & 1)
goto illegal_request;
break;
case RELEASE_10:
if (req->cmd.buf[1] & 3)
goto illegal_request;
break;
case START_STOP:
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM && (req->cmd.buf[4] & 2)) {
/* load/eject medium */
bdrv_eject(s->bs, !(req->cmd.buf[4] & 1));
}
break;
case ALLOW_MEDIUM_REMOVAL:
bdrv_set_locked(s->bs, req->cmd.buf[4] & 1);
break;
case READ_CAPACITY:
/* The normal LEN field for this command is zero. */
memset(outbuf, 0, 8);
bdrv_get_geometry(s->bs, &nb_sectors);
if (!nb_sectors)
goto not_ready;
nb_sectors /= s->cluster_size;
/* Returned value is the address of the last sector. */
nb_sectors--;
/* Remember the new size for read/write sanity checking. */
s->max_lba = nb_sectors;
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
if (nb_sectors > UINT32_MAX)
nb_sectors = UINT32_MAX;
outbuf[0] = (nb_sectors >> 24) & 0xff;
outbuf[1] = (nb_sectors >> 16) & 0xff;
outbuf[2] = (nb_sectors >> 8) & 0xff;
outbuf[3] = nb_sectors & 0xff;
outbuf[4] = 0;
outbuf[5] = 0;
outbuf[6] = s->cluster_size * 2;
outbuf[7] = 0;
buflen = 8;
break;
case SYNCHRONIZE_CACHE:
ret = bdrv_flush(s->bs);
if (ret < 0) {
if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_FLUSH)) {
return -1;
}
}
break;
case GET_CONFIGURATION:
memset(outbuf, 0, 8);
/* ??? This should probably return much more information. For now
just return the basic header indicating the CD-ROM profile. */
outbuf[7] = 8; // CD-ROM
buflen = 8;
break;
case SERVICE_ACTION_IN:
/* Service Action In subcommands. */
if ((req->cmd.buf[1] & 31) == 0x10) {
DPRINTF("SAI READ CAPACITY(16)\n");
memset(outbuf, 0, req->cmd.xfer);
bdrv_get_geometry(s->bs, &nb_sectors);
if (!nb_sectors)
goto not_ready;
nb_sectors /= s->cluster_size;
/* Returned value is the address of the last sector. */
nb_sectors--;
/* Remember the new size for read/write sanity checking. */
s->max_lba = nb_sectors;
outbuf[0] = (nb_sectors >> 56) & 0xff;
outbuf[1] = (nb_sectors >> 48) & 0xff;
outbuf[2] = (nb_sectors >> 40) & 0xff;
outbuf[3] = (nb_sectors >> 32) & 0xff;
outbuf[4] = (nb_sectors >> 24) & 0xff;
outbuf[5] = (nb_sectors >> 16) & 0xff;
outbuf[6] = (nb_sectors >> 8) & 0xff;
outbuf[7] = nb_sectors & 0xff;
outbuf[8] = 0;
outbuf[9] = 0;
outbuf[10] = s->cluster_size * 2;
outbuf[11] = 0;
outbuf[12] = 0;
outbuf[13] = get_physical_block_exp(&s->qdev.conf);
/* set TPE bit if the format supports discard */
if (s->qdev.conf.discard_granularity) {
outbuf[14] = 0x80;
}
/* Protection, exponent and lowest lba field left blank. */
buflen = req->cmd.xfer;
break;
}
DPRINTF("Unsupported Service Action In\n");
goto illegal_request;
case REPORT_LUNS:
if (req->cmd.xfer < 16)
goto illegal_request;
memset(outbuf, 0, 16);
outbuf[3] = 8;
buflen = 16;
break;