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scsi-disk.c
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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 licensed 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
#include "qemu-common.h"
#include "qemu-error.h"
#include "scsi.h"
#include "scsi-defs.h"
#include "sysemu.h"
#include "blockdev.h"
#include "hw/block-common.h"
#include "dma.h"
#ifdef __linux
#include <scsi/sg.h>
#endif
#define SCSI_DMA_BUF_SIZE 131072
#define SCSI_MAX_INQUIRY_LEN 256
#define SCSI_MAX_MODE_LEN 256
typedef struct SCSIDiskState SCSIDiskState;
typedef struct SCSIDiskReq {
SCSIRequest req;
/* Both sector and sector_count are in terms of qemu 512 byte blocks. */
uint64_t sector;
uint32_t sector_count;
uint32_t buflen;
bool started;
struct iovec iov;
QEMUIOVector qiov;
BlockAcctCookie acct;
} SCSIDiskReq;
#define SCSI_DISK_F_REMOVABLE 0
#define SCSI_DISK_F_DPOFUA 1
struct SCSIDiskState
{
SCSIDevice qdev;
uint32_t features;
bool media_changed;
bool media_event;
bool eject_request;
uint64_t wwn;
QEMUBH *bh;
char *version;
char *serial;
char *vendor;
char *product;
bool tray_open;
bool tray_locked;
};
static int scsi_handle_rw_error(SCSIDiskReq *r, int error);
static void scsi_free_request(SCSIRequest *req)
{
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
if (r->iov.iov_base) {
qemu_vfree(r->iov.iov_base);
}
}
/* Helper function for command completion with sense. */
static void scsi_check_condition(SCSIDiskReq *r, SCSISense sense)
{
DPRINTF("Command complete tag=0x%x sense=%d/%d/%d\n",
r->req.tag, sense.key, sense.asc, sense.ascq);
scsi_req_build_sense(&r->req, sense);
scsi_req_complete(&r->req, CHECK_CONDITION);
}
/* Cancel a pending data transfer. */
static void scsi_cancel_io(SCSIRequest *req)
{
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
DPRINTF("Cancel tag=0x%x\n", req->tag);
if (r->req.aiocb) {
bdrv_aio_cancel(r->req.aiocb);
/* This reference was left in by scsi_*_data. We take ownership of
* it the moment scsi_req_cancel is called, independent of whether
* bdrv_aio_cancel completes the request or not. */
scsi_req_unref(&r->req);
}
r->req.aiocb = NULL;
}
static uint32_t scsi_init_iovec(SCSIDiskReq *r, size_t size)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
if (!r->iov.iov_base) {
r->buflen = size;
r->iov.iov_base = qemu_blockalign(s->qdev.conf.bs, r->buflen);
}
r->iov.iov_len = MIN(r->sector_count * 512, r->buflen);
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
return r->qiov.size / 512;
}
static void scsi_disk_save_request(QEMUFile *f, SCSIRequest *req)
{
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
qemu_put_be64s(f, &r->sector);
qemu_put_be32s(f, &r->sector_count);
qemu_put_be32s(f, &r->buflen);
if (r->buflen) {
if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
qemu_put_buffer(f, r->iov.iov_base, r->iov.iov_len);
} else if (!req->retry) {
uint32_t len = r->iov.iov_len;
qemu_put_be32s(f, &len);
qemu_put_buffer(f, r->iov.iov_base, r->iov.iov_len);
}
}
}
static void scsi_disk_load_request(QEMUFile *f, SCSIRequest *req)
{
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
qemu_get_be64s(f, &r->sector);
qemu_get_be32s(f, &r->sector_count);
qemu_get_be32s(f, &r->buflen);
if (r->buflen) {
scsi_init_iovec(r, r->buflen);
if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
qemu_get_buffer(f, r->iov.iov_base, r->iov.iov_len);
} else if (!r->req.retry) {
uint32_t len;
qemu_get_be32s(f, &len);
r->iov.iov_len = len;
assert(r->iov.iov_len <= r->buflen);
qemu_get_buffer(f, r->iov.iov_base, r->iov.iov_len);
}
}
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
}
static void scsi_aio_complete(void *opaque, int ret)
{
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
bdrv_acct_done(s->qdev.conf.bs, &r->acct);
if (ret < 0) {
if (scsi_handle_rw_error(r, -ret)) {
goto done;
}
}
scsi_req_complete(&r->req, GOOD);
done:
if (!r->req.io_canceled) {
scsi_req_unref(&r->req);
}
}
static bool scsi_is_cmd_fua(SCSICommand *cmd)
{
switch (cmd->buf[0]) {
case READ_10:
case READ_12:
case READ_16:
case WRITE_10:
case WRITE_12:
case WRITE_16:
return (cmd->buf[1] & 8) != 0;
case VERIFY_10:
case VERIFY_12:
case VERIFY_16:
case WRITE_VERIFY_10:
case WRITE_VERIFY_12:
case WRITE_VERIFY_16:
return true;
case READ_6:
case WRITE_6:
default:
return false;
}
}
static void scsi_write_do_fua(SCSIDiskReq *r)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
if (scsi_is_cmd_fua(&r->req.cmd)) {
bdrv_acct_start(s->qdev.conf.bs, &r->acct, 0, BDRV_ACCT_FLUSH);
r->req.aiocb = bdrv_aio_flush(s->qdev.conf.bs, scsi_aio_complete, r);
return;
}
scsi_req_complete(&r->req, GOOD);
if (!r->req.io_canceled) {
scsi_req_unref(&r->req);
}
}
static void scsi_dma_complete(void *opaque, int ret)
{
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
bdrv_acct_done(s->qdev.conf.bs, &r->acct);
if (ret < 0) {
if (scsi_handle_rw_error(r, -ret)) {
goto done;
}
}
r->sector += r->sector_count;
r->sector_count = 0;
if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
scsi_write_do_fua(r);
return;
} else {
scsi_req_complete(&r->req, GOOD);
}
done:
if (!r->req.io_canceled) {
scsi_req_unref(&r->req);
}
}
static void scsi_read_complete(void * opaque, int ret)
{
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
int n;
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
bdrv_acct_done(s->qdev.conf.bs, &r->acct);
if (ret < 0) {
if (scsi_handle_rw_error(r, -ret)) {
goto done;
}
}
DPRINTF("Data ready tag=0x%x len=%zd\n", r->req.tag, r->qiov.size);
n = r->qiov.size / 512;
r->sector += n;
r->sector_count -= n;
scsi_req_data(&r->req, r->qiov.size);
done:
if (!r->req.io_canceled) {
scsi_req_unref(&r->req);
}
}
/* Actually issue a read to the block device. */
static void scsi_do_read(void *opaque, int ret)
{
SCSIDiskReq *r = opaque;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
uint32_t n;
if (r->req.aiocb != NULL) {
r->req.aiocb = NULL;
bdrv_acct_done(s->qdev.conf.bs, &r->acct);
}
if (ret < 0) {
if (scsi_handle_rw_error(r, -ret)) {
goto done;
}
}
if (r->req.io_canceled) {
return;
}
/* The request is used as the AIO opaque value, so add a ref. */
scsi_req_ref(&r->req);
if (r->req.sg) {
dma_acct_start(s->qdev.conf.bs, &r->acct, r->req.sg, BDRV_ACCT_READ);
r->req.resid -= r->req.sg->size;
r->req.aiocb = dma_bdrv_read(s->qdev.conf.bs, r->req.sg, r->sector,
scsi_dma_complete, r);
} else {
n = scsi_init_iovec(r, SCSI_DMA_BUF_SIZE);
bdrv_acct_start(s->qdev.conf.bs, &r->acct, n * BDRV_SECTOR_SIZE, BDRV_ACCT_READ);
r->req.aiocb = bdrv_aio_readv(s->qdev.conf.bs, r->sector, &r->qiov, n,
scsi_read_complete, r);
}
done:
if (!r->req.io_canceled) {
scsi_req_unref(&r->req);
}
}
/* Read more data from scsi device into buffer. */
static void scsi_read_data(SCSIRequest *req)
{
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
bool first;
DPRINTF("Read sector_count=%d\n", r->sector_count);
if (r->sector_count == 0) {
/* This also clears the sense buffer for REQUEST SENSE. */
scsi_req_complete(&r->req, GOOD);
return;
}
/* No data transfer may already be in progress */
assert(r->req.aiocb == NULL);
/* The request is used as the AIO opaque value, so add a ref. */
scsi_req_ref(&r->req);
if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
DPRINTF("Data transfer direction invalid\n");
scsi_read_complete(r, -EINVAL);
return;
}
if (s->tray_open) {
scsi_read_complete(r, -ENOMEDIUM);
return;
}
first = !r->started;
r->started = true;
if (first && scsi_is_cmd_fua(&r->req.cmd)) {
bdrv_acct_start(s->qdev.conf.bs, &r->acct, 0, BDRV_ACCT_FLUSH);
r->req.aiocb = bdrv_aio_flush(s->qdev.conf.bs, scsi_do_read, r);
} else {
scsi_do_read(r, 0);
}
}
/*
* scsi_handle_rw_error has two return values. 0 means that the error
* must be ignored, 1 means that the error has been processed and the
* caller should not do anything else for this request. Note that
* scsi_handle_rw_error always manages its reference counts, independent
* of the return value.
*/
static int scsi_handle_rw_error(SCSIDiskReq *r, int error)
{
bool is_read = (r->req.cmd.xfer == SCSI_XFER_FROM_DEV);
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
BlockErrorAction action = bdrv_get_error_action(s->qdev.conf.bs, is_read, error);
if (action == BDRV_ACTION_REPORT) {
switch (error) {
case ENOMEDIUM:
scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
break;
case ENOMEM:
scsi_check_condition(r, SENSE_CODE(TARGET_FAILURE));
break;
case EINVAL:
scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
break;
default:
scsi_check_condition(r, SENSE_CODE(IO_ERROR));
break;
}
}
bdrv_error_action(s->qdev.conf.bs, action, is_read, error);
if (action == BDRV_ACTION_STOP) {
scsi_req_retry(&r->req);
}
return action != BDRV_ACTION_IGNORE;
}
static void scsi_write_complete(void * opaque, int ret)
{
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
uint32_t n;
if (r->req.aiocb != NULL) {
r->req.aiocb = NULL;
bdrv_acct_done(s->qdev.conf.bs, &r->acct);
}
if (ret < 0) {
if (scsi_handle_rw_error(r, -ret)) {
goto done;
}
}
n = r->qiov.size / 512;
r->sector += n;
r->sector_count -= n;
if (r->sector_count == 0) {
scsi_write_do_fua(r);
return;
} else {
scsi_init_iovec(r, SCSI_DMA_BUF_SIZE);
DPRINTF("Write complete tag=0x%x more=%zd\n", r->req.tag, r->qiov.size);
scsi_req_data(&r->req, r->qiov.size);
}
done:
if (!r->req.io_canceled) {
scsi_req_unref(&r->req);
}
}
static void scsi_write_data(SCSIRequest *req)
{
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
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);
/* The request is used as the AIO opaque value, so add a ref. */
scsi_req_ref(&r->req);
if (r->req.cmd.mode != SCSI_XFER_TO_DEV) {
DPRINTF("Data transfer direction invalid\n");
scsi_write_complete(r, -EINVAL);
return;
}
if (!r->req.sg && !r->qiov.size) {
/* Called for the first time. Ask the driver to send us more data. */
r->started = true;
scsi_write_complete(r, 0);
return;
}
if (s->tray_open) {
scsi_write_complete(r, -ENOMEDIUM);
return;
}
if (r->req.cmd.buf[0] == VERIFY_10 || r->req.cmd.buf[0] == VERIFY_12 ||
r->req.cmd.buf[0] == VERIFY_16) {
if (r->req.sg) {
scsi_dma_complete(r, 0);
} else {
scsi_write_complete(r, 0);
}
return;
}
if (r->req.sg) {
dma_acct_start(s->qdev.conf.bs, &r->acct, r->req.sg, BDRV_ACCT_WRITE);
r->req.resid -= r->req.sg->size;
r->req.aiocb = dma_bdrv_write(s->qdev.conf.bs, r->req.sg, r->sector,
scsi_dma_complete, r);
} else {
n = r->qiov.size / 512;
bdrv_acct_start(s->qdev.conf.bs, &r->acct, n * BDRV_SECTOR_SIZE, BDRV_ACCT_WRITE);
r->req.aiocb = bdrv_aio_writev(s->qdev.conf.bs, r->sector, &r->qiov, n,
scsi_write_complete, r);
}
}
/* Return a pointer to the data buffer. */
static uint8_t *scsi_get_buf(SCSIRequest *req)
{
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
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;
int start;
if (req->cmd.buf[1] & 0x1) {
/* Vital product data */
uint8_t page_code = req->cmd.buf[2];
outbuf[buflen++] = s->qdev.type & 0x1f;
outbuf[buflen++] = page_code ; // this page
outbuf[buflen++] = 0x00;
outbuf[buflen++] = 0x00;
start = buflen;
switch (page_code) {
case 0x00: /* Supported page codes, mandatory */
{
DPRINTF("Inquiry EVPD[Supported pages] "
"buffer size %zd\n", req->cmd.xfer);
outbuf[buflen++] = 0x00; // list of supported pages (this page)
if (s->serial) {
outbuf[buflen++] = 0x80; // unit serial number
}
outbuf[buflen++] = 0x83; // device identification
if (s->qdev.type == TYPE_DISK) {
outbuf[buflen++] = 0xb0; // block limits
outbuf[buflen++] = 0xb2; // thin provisioning
}
break;
}
case 0x80: /* Device serial number, optional */
{
int l;
if (!s->serial) {
DPRINTF("Inquiry (EVPD[Serial number] not supported\n");
return -1;
}
l = strlen(s->serial);
if (l > 20) {
l = 20;
}
DPRINTF("Inquiry EVPD[Serial number] "
"buffer size %zd\n", req->cmd.xfer);
memcpy(outbuf+buflen, s->serial, l);
buflen += l;
break;
}
case 0x83: /* Device identification page, mandatory */
{
const char *str = s->serial ?: bdrv_get_device_name(s->qdev.conf.bs);
int max_len = s->serial ? 20 : 255 - 8;
int id_len = strlen(str);
if (id_len > max_len) {
id_len = max_len;
}
DPRINTF("Inquiry EVPD[Device identification] "
"buffer size %zd\n", req->cmd.xfer);
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, str, id_len);
buflen += id_len;
if (s->wwn) {
outbuf[buflen++] = 0x1; // Binary
outbuf[buflen++] = 0x3; // NAA
outbuf[buflen++] = 0; // reserved
outbuf[buflen++] = 8;
stq_be_p(&outbuf[buflen], s->wwn);
buflen += 8;
}
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 (s->qdev.type == TYPE_ROM) {
DPRINTF("Inquiry (EVPD[%02X] not supported for CDROM\n",
page_code);
return -1;
}
/* required VPD size with unmap support */
buflen = 0x40;
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 */
{
buflen = 8;
outbuf[4] = 0;
outbuf[5] = 0xe0; /* unmap & write_same 10/16 all supported */
outbuf[6] = s->qdev.conf.discard_granularity ? 2 : 1;
outbuf[7] = 0;
break;
}
default:
return -1;
}
/* done with EVPD */
assert(buflen - start <= 255);
outbuf[start - 1] = buflen - start;
return buflen;
}
/* Standard INQUIRY data */
if (req->cmd.buf[2] != 0) {
return -1;
}
/* PAGE CODE == 0 */
buflen = req->cmd.xfer;
if (buflen > SCSI_MAX_INQUIRY_LEN) {
buflen = SCSI_MAX_INQUIRY_LEN;
}
memset(outbuf, 0, buflen);
outbuf[0] = s->qdev.type & 0x1f;
outbuf[1] = (s->features & (1 << SCSI_DISK_F_REMOVABLE)) ? 0x80 : 0;
strpadcpy((char *) &outbuf[16], 16, s->product, ' ');
strpadcpy((char *) &outbuf[8], 8, s->vendor, ' ');
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 | 0x10; /* Format 2, HiSup */
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->info->tcq ? 0x02 : 0);
return buflen;
}
static inline bool media_is_dvd(SCSIDiskState *s)
{
uint64_t nb_sectors;
if (s->qdev.type != TYPE_ROM) {
return false;
}
if (!bdrv_is_inserted(s->qdev.conf.bs)) {
return false;
}
bdrv_get_geometry(s->qdev.conf.bs, &nb_sectors);
return nb_sectors > CD_MAX_SECTORS;
}
static inline bool media_is_cd(SCSIDiskState *s)
{
uint64_t nb_sectors;
if (s->qdev.type != TYPE_ROM) {
return false;
}
if (!bdrv_is_inserted(s->qdev.conf.bs)) {
return false;
}
bdrv_get_geometry(s->qdev.conf.bs, &nb_sectors);
return nb_sectors <= CD_MAX_SECTORS;
}
static int scsi_read_disc_information(SCSIDiskState *s, SCSIDiskReq *r,
uint8_t *outbuf)
{
uint8_t type = r->req.cmd.buf[1] & 7;
if (s->qdev.type != TYPE_ROM) {
return -1;
}
/* Types 1/2 are only defined for Blu-Ray. */
if (type != 0) {
scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
return -1;
}
memset(outbuf, 0, 34);
outbuf[1] = 32;
outbuf[2] = 0xe; /* last session complete, disc finalized */
outbuf[3] = 1; /* first track on disc */
outbuf[4] = 1; /* # of sessions */
outbuf[5] = 1; /* first track of last session */
outbuf[6] = 1; /* last track of last session */
outbuf[7] = 0x20; /* unrestricted use */
outbuf[8] = 0x00; /* CD-ROM or DVD-ROM */
/* 9-10-11: most significant byte corresponding bytes 4-5-6 */
/* 12-23: not meaningful for CD-ROM or DVD-ROM */
/* 24-31: disc bar code */
/* 32: disc application code */
/* 33: number of OPC tables */
return 34;
}
static int scsi_read_dvd_structure(SCSIDiskState *s, SCSIDiskReq *r,
uint8_t *outbuf)
{
static const int rds_caps_size[5] = {
[0] = 2048 + 4,
[1] = 4 + 4,
[3] = 188 + 4,
[4] = 2048 + 4,
};
uint8_t media = r->req.cmd.buf[1];
uint8_t layer = r->req.cmd.buf[6];
uint8_t format = r->req.cmd.buf[7];
int size = -1;
if (s->qdev.type != TYPE_ROM) {
return -1;
}
if (media != 0) {
scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
return -1;
}
if (format != 0xff) {
if (s->tray_open || !bdrv_is_inserted(s->qdev.conf.bs)) {
scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
return -1;
}
if (media_is_cd(s)) {
scsi_check_condition(r, SENSE_CODE(INCOMPATIBLE_FORMAT));
return -1;
}
if (format >= ARRAY_SIZE(rds_caps_size)) {
return -1;
}
size = rds_caps_size[format];
memset(outbuf, 0, size);
}
switch (format) {
case 0x00: {
/* Physical format information */
uint64_t nb_sectors;
if (layer != 0) {
goto fail;
}
bdrv_get_geometry(s->qdev.conf.bs, &nb_sectors);
outbuf[4] = 1; /* DVD-ROM, part version 1 */
outbuf[5] = 0xf; /* 120mm disc, minimum rate unspecified */
outbuf[6] = 1; /* one layer, read-only (per MMC-2 spec) */
outbuf[7] = 0; /* default densities */
stl_be_p(&outbuf[12], (nb_sectors >> 2) - 1); /* end sector */
stl_be_p(&outbuf[16], (nb_sectors >> 2) - 1); /* l0 end sector */
break;
}
case 0x01: /* DVD copyright information, all zeros */
break;
case 0x03: /* BCA information - invalid field for no BCA info */
return -1;
case 0x04: /* DVD disc manufacturing information, all zeros */
break;
case 0xff: { /* List capabilities */
int i;
size = 4;
for (i = 0; i < ARRAY_SIZE(rds_caps_size); i++) {
if (!rds_caps_size[i]) {
continue;
}
outbuf[size] = i;
outbuf[size + 1] = 0x40; /* Not writable, readable */
stw_be_p(&outbuf[size + 2], rds_caps_size[i]);
size += 4;
}
break;
}
default:
return -1;
}
/* Size of buffer, not including 2 byte size field */
stw_be_p(outbuf, size - 2);
return size;
fail:
return -1;
}
static int scsi_event_status_media(SCSIDiskState *s, uint8_t *outbuf)
{
uint8_t event_code, media_status;
media_status = 0;
if (s->tray_open) {
media_status = MS_TRAY_OPEN;
} else if (bdrv_is_inserted(s->qdev.conf.bs)) {
media_status = MS_MEDIA_PRESENT;
}
/* Event notification descriptor */
event_code = MEC_NO_CHANGE;
if (media_status != MS_TRAY_OPEN) {
if (s->media_event) {
event_code = MEC_NEW_MEDIA;
s->media_event = false;
} else if (s->eject_request) {
event_code = MEC_EJECT_REQUESTED;
s->eject_request = false;
}
}
outbuf[0] = event_code;
outbuf[1] = media_status;
/* These fields are reserved, just clear them. */
outbuf[2] = 0;
outbuf[3] = 0;
return 4;
}
static int scsi_get_event_status_notification(SCSIDiskState *s, SCSIDiskReq *r,
uint8_t *outbuf)
{
int size;
uint8_t *buf = r->req.cmd.buf;
uint8_t notification_class_request = buf[4];
if (s->qdev.type != TYPE_ROM) {
return -1;
}
if ((buf[1] & 1) == 0) {
/* asynchronous */
return -1;
}
size = 4;
outbuf[0] = outbuf[1] = 0;
outbuf[3] = 1 << GESN_MEDIA; /* supported events */
if (notification_class_request & (1 << GESN_MEDIA)) {
outbuf[2] = GESN_MEDIA;
size += scsi_event_status_media(s, &outbuf[size]);
} else {
outbuf[2] = 0x80;
}
stw_be_p(outbuf, size - 4);
return size;
}
static int scsi_get_configuration(SCSIDiskState *s, uint8_t *outbuf)
{
int current;
if (s->qdev.type != TYPE_ROM) {
return -1;
}
current = media_is_dvd(s) ? MMC_PROFILE_DVD_ROM : MMC_PROFILE_CD_ROM;
memset(outbuf, 0, 40);
stl_be_p(&outbuf[0], 36); /* Bytes after the data length field */
stw_be_p(&outbuf[6], current);
/* outbuf[8] - outbuf[19]: Feature 0 - Profile list */
outbuf[10] = 0x03; /* persistent, current */
outbuf[11] = 8; /* two profiles */
stw_be_p(&outbuf[12], MMC_PROFILE_DVD_ROM);
outbuf[14] = (current == MMC_PROFILE_DVD_ROM);
stw_be_p(&outbuf[16], MMC_PROFILE_CD_ROM);
outbuf[18] = (current == MMC_PROFILE_CD_ROM);
/* outbuf[20] - outbuf[31]: Feature 1 - Core feature */
stw_be_p(&outbuf[20], 1);
outbuf[22] = 0x08 | 0x03; /* version 2, persistent, current */
outbuf[23] = 8;
stl_be_p(&outbuf[24], 1); /* SCSI */
outbuf[28] = 1; /* DBE = 1, mandatory */
/* outbuf[32] - outbuf[39]: Feature 3 - Removable media feature */
stw_be_p(&outbuf[32], 3);
outbuf[34] = 0x08 | 0x03; /* version 2, persistent, current */
outbuf[35] = 4;
outbuf[36] = 0x39; /* tray, load=1, eject=1, unlocked at powerup, lock=1 */
/* TODO: Random readable, CD read, DVD read, drive serial number,
power management */
return 40;
}
static int scsi_emulate_mechanism_status(SCSIDiskState *s, uint8_t *outbuf)
{
if (s->qdev.type != TYPE_ROM) {
return -1;
}
memset(outbuf, 0, 8);
outbuf[5] = 1; /* CD-ROM */
return 8;
}
static int mode_sense_page(SCSIDiskState *s, int page, uint8_t **p_outbuf,
int page_control)
{
static const int mode_sense_valid[0x3f] = {
[MODE_PAGE_HD_GEOMETRY] = (1 << TYPE_DISK),
[MODE_PAGE_FLEXIBLE_DISK_GEOMETRY] = (1 << TYPE_DISK),
[MODE_PAGE_CACHING] = (1 << TYPE_DISK) | (1 << TYPE_ROM),
[MODE_PAGE_R_W_ERROR] = (1 << TYPE_DISK) | (1 << TYPE_ROM),
[MODE_PAGE_AUDIO_CTL] = (1 << TYPE_ROM),
[MODE_PAGE_CAPABILITIES] = (1 << TYPE_ROM),
};
uint8_t *p = *p_outbuf + 2;
int length;
if ((mode_sense_valid[page] & (1 << s->qdev.type)) == 0) {
return -1;
}
/*
* 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.
*
* The offsets here are off by two compared to the descriptions in the
* SCSI specs, because those include a 2-byte header. This is unfortunate,
* but it is done so that offsets are consistent within our implementation
* of MODE SENSE and MODE SELECT. MODE SELECT has to deal with both
* 2-byte and 4-byte headers.
*/
switch (page) {
case MODE_PAGE_HD_GEOMETRY:
length = 0x16;
if (page_control == 1) { /* Changeable Values */
break;
}
/* if a geometry hint is available, use it */
p[0] = (s->qdev.conf.cyls >> 16) & 0xff;
p[1] = (s->qdev.conf.cyls >> 8) & 0xff;
p[2] = s->qdev.conf.cyls & 0xff;
p[3] = s->qdev.conf.heads & 0xff;
/* Write precomp start cylinder, disabled */
p[4] = (s->qdev.conf.cyls >> 16) & 0xff;
p[5] = (s->qdev.conf.cyls >> 8) & 0xff;
p[6] = s->qdev.conf.cyls & 0xff;
/* Reduced current start cylinder, disabled */
p[7] = (s->qdev.conf.cyls >> 16) & 0xff;
p[8] = (s->qdev.conf.cyls >> 8) & 0xff;
p[9] = s->qdev.conf.cyls & 0xff;
/* Device step rate [ns], 200ns */
p[10] = 0;
p[11] = 200;
/* Landing zone cylinder */
p[12] = 0xff;
p[13] = 0xff;
p[14] = 0xff;
/* Medium rotation rate [rpm], 5400 rpm */