#endif
#include "qemu/osdep.h"
-#include "qemu-common.h"
+#include "qapi/error.h"
#include "qemu/error-report.h"
#include "hw/scsi/scsi.h"
#include "block/scsi.h"
#include "sysemu/blockdev.h"
#include "hw/block/block.h"
#include "sysemu/dma.h"
+#include "qemu/cutils.h"
#ifdef __linux
#include <scsi/sg.h>
#define DEFAULT_MAX_UNMAP_SIZE (1 << 30) /* 1 GB */
#define DEFAULT_MAX_IO_SIZE INT_MAX /* 2 GB - 1 block */
-typedef struct SCSIDiskState SCSIDiskState;
+#define TYPE_SCSI_DISK_BASE "scsi-disk-base"
+
+#define SCSI_DISK_BASE(obj) \
+ OBJECT_CHECK(SCSIDiskState, (obj), TYPE_SCSI_DISK_BASE)
+#define SCSI_DISK_BASE_CLASS(klass) \
+ OBJECT_CLASS_CHECK(SCSIDiskClass, (klass), TYPE_SCSI_DISK_BASE)
+#define SCSI_DISK_BASE_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(SCSIDiskClass, (obj), TYPE_SCSI_DISK_BASE)
+
+typedef struct SCSIDiskClass {
+ SCSIDeviceClass parent_class;
+ DMAIOFunc *dma_readv;
+ DMAIOFunc *dma_writev;
+ bool (*need_fua_emulation)(SCSICommand *cmd);
+} SCSIDiskClass;
typedef struct SCSIDiskReq {
SCSIRequest req;
uint32_t sector_count;
uint32_t buflen;
bool started;
+ bool need_fua_emulation;
struct iovec iov;
QEMUIOVector qiov;
BlockAcctCookie acct;
+ unsigned char *status;
} SCSIDiskReq;
#define SCSI_DISK_F_REMOVABLE 0
#define SCSI_DISK_F_DPOFUA 1
#define SCSI_DISK_F_NO_REMOVABLE_DEVOPS 2
-struct SCSIDiskState
+typedef struct SCSIDiskState
{
SCSIDevice qdev;
uint32_t features;
char *product;
bool tray_open;
bool tray_locked;
-};
+} SCSIDiskState;
static int scsi_handle_rw_error(SCSIDiskReq *r, int error, bool acct_failed);
scsi_req_complete(&r->req, CHECK_CONDITION);
}
-static uint32_t scsi_init_iovec(SCSIDiskReq *r, size_t size)
+static void scsi_init_iovec(SCSIDiskReq *r, size_t size)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
}
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)
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
}
+static bool scsi_disk_req_check_error(SCSIDiskReq *r, int ret, bool acct_failed)
+{
+ if (r->req.io_canceled) {
+ scsi_req_cancel_complete(&r->req);
+ return true;
+ }
+
+ if (ret < 0) {
+ return scsi_handle_rw_error(r, -ret, acct_failed);
+ }
+
+ if (r->status && *r->status) {
+ if (acct_failed) {
+ SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
+ block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
+ }
+ scsi_req_complete(&r->req, *r->status);
+ return true;
+ }
+
+ return false;
+}
+
static void scsi_aio_complete(void *opaque, int ret)
{
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
- if (r->req.io_canceled) {
- scsi_req_cancel_complete(&r->req);
+ if (scsi_disk_req_check_error(r, ret, true)) {
goto done;
}
- if (ret < 0) {
- if (scsi_handle_rw_error(r, -ret, true)) {
- goto done;
- }
- }
-
block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
scsi_req_complete(&r->req, GOOD);
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
assert(r->req.aiocb == NULL);
+ assert(!r->req.io_canceled);
- if (r->req.io_canceled) {
- scsi_req_cancel_complete(&r->req);
- goto done;
- }
-
- if (scsi_is_cmd_fua(&r->req.cmd)) {
+ if (r->need_fua_emulation) {
block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0,
BLOCK_ACCT_FLUSH);
r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_aio_complete, r);
}
scsi_req_complete(&r->req, GOOD);
-
-done:
scsi_req_unref(&r->req);
}
static void scsi_dma_complete_noio(SCSIDiskReq *r, int ret)
{
assert(r->req.aiocb == NULL);
-
- if (r->req.io_canceled) {
- scsi_req_cancel_complete(&r->req);
+ if (scsi_disk_req_check_error(r, ret, false)) {
goto done;
}
- if (ret < 0) {
- if (scsi_handle_rw_error(r, -ret, false)) {
- goto done;
- }
- }
-
r->sector += r->sector_count;
r->sector_count = 0;
if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
- if (r->req.io_canceled) {
- scsi_req_cancel_complete(&r->req);
+ if (scsi_disk_req_check_error(r, ret, true)) {
goto done;
}
- if (ret < 0) {
- if (scsi_handle_rw_error(r, -ret, true)) {
- goto done;
- }
- }
-
block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
DPRINTF("Data ready tag=0x%x len=%zd\n", r->req.tag, r->qiov.size);
static void scsi_do_read(SCSIDiskReq *r, int ret)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
- uint32_t n;
+ SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s));
assert (r->req.aiocb == NULL);
-
- if (r->req.io_canceled) {
- scsi_req_cancel_complete(&r->req);
+ if (scsi_disk_req_check_error(r, ret, false)) {
goto done;
}
- if (ret < 0) {
- if (scsi_handle_rw_error(r, -ret, false)) {
- goto done;
- }
- }
-
/* 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.blk, &r->acct, r->req.sg, BLOCK_ACCT_READ);
r->req.resid -= r->req.sg->size;
- r->req.aiocb = dma_blk_read(s->qdev.conf.blk, r->req.sg, r->sector,
- scsi_dma_complete, r);
+ r->req.aiocb = dma_blk_io(blk_get_aio_context(s->qdev.conf.blk),
+ r->req.sg, r->sector << BDRV_SECTOR_BITS,
+ BDRV_SECTOR_SIZE,
+ sdc->dma_readv, r, scsi_dma_complete, r,
+ DMA_DIRECTION_FROM_DEVICE);
} else {
- n = scsi_init_iovec(r, SCSI_DMA_BUF_SIZE);
+ scsi_init_iovec(r, SCSI_DMA_BUF_SIZE);
block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
- n * BDRV_SECTOR_SIZE, BLOCK_ACCT_READ);
- r->req.aiocb = blk_aio_readv(s->qdev.conf.blk, r->sector, &r->qiov, n,
- scsi_read_complete, r);
+ r->qiov.size, BLOCK_ACCT_READ);
+ r->req.aiocb = sdc->dma_readv(r->sector << BDRV_SECTOR_BITS, &r->qiov,
+ scsi_read_complete, r, r);
}
done:
return;
}
- if (s->tray_open) {
+ if (!blk_is_available(req->dev->conf.blk)) {
scsi_read_complete(r, -ENOMEDIUM);
return;
}
first = !r->started;
r->started = true;
- if (first && scsi_is_cmd_fua(&r->req.cmd)) {
+ if (first && r->need_fua_emulation) {
block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0,
BLOCK_ACCT_FLUSH);
r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_do_read_cb, r);
uint32_t n;
assert (r->req.aiocb == NULL);
-
- if (r->req.io_canceled) {
- scsi_req_cancel_complete(&r->req);
+ if (scsi_disk_req_check_error(r, ret, false)) {
goto done;
}
- if (ret < 0) {
- if (scsi_handle_rw_error(r, -ret, false)) {
- goto done;
- }
- }
-
n = r->qiov.size / 512;
r->sector += n;
r->sector_count -= n;
{
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
- uint32_t n;
+ SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s));
/* No data transfer may already be in progress */
assert(r->req.aiocb == NULL);
scsi_write_complete_noio(r, 0);
return;
}
- if (s->tray_open) {
+ if (!blk_is_available(req->dev->conf.blk)) {
scsi_write_complete_noio(r, -ENOMEDIUM);
return;
}
if (r->req.sg) {
dma_acct_start(s->qdev.conf.blk, &r->acct, r->req.sg, BLOCK_ACCT_WRITE);
r->req.resid -= r->req.sg->size;
- r->req.aiocb = dma_blk_write(s->qdev.conf.blk, r->req.sg, r->sector,
- scsi_dma_complete, r);
+ r->req.aiocb = dma_blk_io(blk_get_aio_context(s->qdev.conf.blk),
+ r->req.sg, r->sector << BDRV_SECTOR_BITS,
+ BDRV_SECTOR_SIZE,
+ sdc->dma_writev, r, scsi_dma_complete, r,
+ DMA_DIRECTION_TO_DEVICE);
} else {
- n = r->qiov.size / 512;
block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
- n * BDRV_SECTOR_SIZE, BLOCK_ACCT_WRITE);
- r->req.aiocb = blk_aio_writev(s->qdev.conf.blk, r->sector, &r->qiov, n,
- scsi_write_complete, r);
+ r->qiov.size, BLOCK_ACCT_WRITE);
+ r->req.aiocb = sdc->dma_writev(r->sector << BDRV_SECTOR_BITS, &r->qiov,
+ scsi_write_complete, r, r);
}
}
}
l = strlen(s->serial);
- if (l > 20) {
- l = 20;
+ if (l > 36) {
+ l = 36;
}
DPRINTF("Inquiry EVPD[Serial number] "
if (s->qdev.type != TYPE_ROM) {
return false;
}
- if (!blk_is_inserted(s->qdev.conf.blk)) {
- return false;
- }
- if (s->tray_open) {
+ if (!blk_is_available(s->qdev.conf.blk)) {
return false;
}
blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
if (s->qdev.type != TYPE_ROM) {
return false;
}
- if (!blk_is_inserted(s->qdev.conf.blk)) {
- return false;
- }
- if (s->tray_open) {
+ if (!blk_is_available(s->qdev.conf.blk)) {
return false;
}
blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
}
if (format != 0xff) {
- if (s->tray_open || !blk_is_inserted(s->qdev.conf.blk)) {
+ if (!blk_is_available(s->qdev.conf.blk)) {
scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
return -1;
}
uint32_t nb_sectors;
assert(r->req.aiocb == NULL);
-
- if (r->req.io_canceled) {
- scsi_req_cancel_complete(&r->req);
+ if (scsi_disk_req_check_error(r, ret, false)) {
goto done;
}
- if (ret < 0) {
- if (scsi_handle_rw_error(r, -ret, false)) {
- goto done;
- }
- }
-
if (data->count > 0) {
sector_num = ldq_be_p(&data->inbuf[0]);
nb_sectors = ldl_be_p(&data->inbuf[8]) & 0xffffffffULL;
goto done;
}
- r->req.aiocb = blk_aio_discard(s->qdev.conf.blk,
- sector_num * (s->qdev.blocksize / 512),
- nb_sectors * (s->qdev.blocksize / 512),
- scsi_unmap_complete, data);
+ r->req.aiocb = blk_aio_pdiscard(s->qdev.conf.blk,
+ sector_num * s->qdev.blocksize,
+ nb_sectors * s->qdev.blocksize,
+ scsi_unmap_complete, data);
data->count--;
data->inbuf += 16;
return;
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
- if (r->req.io_canceled) {
- scsi_req_cancel_complete(&r->req);
+ if (scsi_disk_req_check_error(r, ret, true)) {
goto done;
}
- if (ret < 0) {
- if (scsi_handle_rw_error(r, -ret, true)) {
- goto done;
- }
- }
-
block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
data->nb_sectors -= data->iov.iov_len / 512;
if (data->iov.iov_len) {
block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
data->iov.iov_len, BLOCK_ACCT_WRITE);
- /* blk_aio_write doesn't like the qiov size being different from
- * nb_sectors, make sure they match.
- */
+ /* Reinitialize qiov, to handle unaligned WRITE SAME request
+ * where final qiov may need smaller size */
qemu_iovec_init_external(&data->qiov, &data->iov, 1);
- r->req.aiocb = blk_aio_writev(s->qdev.conf.blk, data->sector,
- &data->qiov, data->iov.iov_len / 512,
- scsi_write_same_complete, data);
+ r->req.aiocb = blk_aio_pwritev(s->qdev.conf.blk,
+ data->sector << BDRV_SECTOR_BITS,
+ &data->qiov, 0,
+ scsi_write_same_complete, data);
return;
}
block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
nb_sectors * s->qdev.blocksize,
BLOCK_ACCT_WRITE);
- r->req.aiocb = blk_aio_write_zeroes(s->qdev.conf.blk,
- r->req.cmd.lba * (s->qdev.blocksize / 512),
- nb_sectors * (s->qdev.blocksize / 512),
+ r->req.aiocb = blk_aio_pwrite_zeroes(s->qdev.conf.blk,
+ r->req.cmd.lba * s->qdev.blocksize,
+ nb_sectors * s->qdev.blocksize,
flags, scsi_aio_complete, r);
return;
}
scsi_req_ref(&r->req);
block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
data->iov.iov_len, BLOCK_ACCT_WRITE);
- r->req.aiocb = blk_aio_writev(s->qdev.conf.blk, data->sector,
- &data->qiov, data->iov.iov_len / 512,
- scsi_write_same_complete, data);
+ r->req.aiocb = blk_aio_pwritev(s->qdev.conf.blk,
+ data->sector << BDRV_SECTOR_BITS,
+ &data->qiov, 0,
+ scsi_write_same_complete, data);
}
static void scsi_disk_emulate_write_data(SCSIRequest *req)
break;
default:
- if (s->tray_open || !blk_is_inserted(s->qdev.conf.blk)) {
+ if (!blk_is_available(s->qdev.conf.blk)) {
scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
return 0;
}
memset(outbuf, 0, r->buflen);
switch (req->cmd.buf[0]) {
case TEST_UNIT_READY:
- assert(!s->tray_open && blk_is_inserted(s->qdev.conf.blk));
+ assert(blk_is_available(s->qdev.conf.blk));
break;
case INQUIRY:
buflen = scsi_disk_emulate_inquiry(req, outbuf);
}
break;
case MODE_SELECT:
- DPRINTF("Mode Select(6) (len %lu)\n", (long)r->req.cmd.xfer);
+ DPRINTF("Mode Select(6) (len %lu)\n", (unsigned long)r->req.cmd.xfer);
break;
case MODE_SELECT_10:
- DPRINTF("Mode Select(10) (len %lu)\n", (long)r->req.cmd.xfer);
+ DPRINTF("Mode Select(10) (len %lu)\n", (unsigned long)r->req.cmd.xfer);
break;
case UNMAP:
- DPRINTF("Unmap (len %lu)\n", (long)r->req.cmd.xfer);
+ DPRINTF("Unmap (len %lu)\n", (unsigned long)r->req.cmd.xfer);
break;
case VERIFY_10:
case VERIFY_12:
case WRITE_SAME_16:
DPRINTF("WRITE SAME %d (len %lu)\n",
req->cmd.buf[0] == WRITE_SAME_10 ? 10 : 16,
- (long)r->req.cmd.xfer);
+ (unsigned long)r->req.cmd.xfer);
break;
default:
DPRINTF("Unknown SCSI command (%2.2x=%s)\n", buf[0],
{
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
+ SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s));
uint32_t len;
uint8_t command;
command = buf[0];
- if (s->tray_open || !blk_is_inserted(s->qdev.conf.blk)) {
+ if (!blk_is_available(s->qdev.conf.blk)) {
scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
return 0;
}
scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE));
return 0;
}
+ r->need_fua_emulation = sdc->need_fua_emulation(&r->req.cmd);
if (r->sector_count == 0) {
scsi_req_complete(&r->req, GOOD);
}
return;
}
}
+ blkconf_apply_backend_options(&dev->conf);
if (s->qdev.conf.discard_granularity == -1) {
s->qdev.conf.discard_granularity =
static void scsi_cd_realize(SCSIDevice *dev, Error **errp)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
+
+ if (!dev->conf.blk) {
+ dev->conf.blk = blk_new();
+ }
+
s->qdev.blocksize = 2048;
s->qdev.type = TYPE_ROM;
s->features |= 1 << SCSI_DISK_F_REMOVABLE;
scsi_generic_read_device_identification(&s->qdev);
}
+typedef struct SCSIBlockReq {
+ SCSIDiskReq req;
+ sg_io_hdr_t io_header;
+
+ /* Selected bytes of the original CDB, copied into our own CDB. */
+ uint8_t cmd, cdb1, group_number;
+
+ /* CDB passed to SG_IO. */
+ uint8_t cdb[16];
+} SCSIBlockReq;
+
+static BlockAIOCB *scsi_block_do_sgio(SCSIBlockReq *req,
+ int64_t offset, QEMUIOVector *iov,
+ int direction,
+ BlockCompletionFunc *cb, void *opaque)
+{
+ sg_io_hdr_t *io_header = &req->io_header;
+ SCSIDiskReq *r = &req->req;
+ SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
+ int nb_logical_blocks;
+ uint64_t lba;
+ BlockAIOCB *aiocb;
+
+ /* This is not supported yet. It can only happen if the guest does
+ * reads and writes that are not aligned to one logical sectors
+ * _and_ cover multiple MemoryRegions.
+ */
+ assert(offset % s->qdev.blocksize == 0);
+ assert(iov->size % s->qdev.blocksize == 0);
+
+ io_header->interface_id = 'S';
+
+ /* The data transfer comes from the QEMUIOVector. */
+ io_header->dxfer_direction = direction;
+ io_header->dxfer_len = iov->size;
+ io_header->dxferp = (void *)iov->iov;
+ io_header->iovec_count = iov->niov;
+ assert(io_header->iovec_count == iov->niov); /* no overflow! */
+
+ /* Build a new CDB with the LBA and length patched in, in case
+ * DMA helpers split the transfer in multiple segments. Do not
+ * build a CDB smaller than what the guest wanted, and only build
+ * a larger one if strictly necessary.
+ */
+ io_header->cmdp = req->cdb;
+ lba = offset / s->qdev.blocksize;
+ nb_logical_blocks = io_header->dxfer_len / s->qdev.blocksize;
+
+ if ((req->cmd >> 5) == 0 && lba <= 0x1ffff) {
+ /* 6-byte CDB */
+ stl_be_p(&req->cdb[0], lba | (req->cmd << 24));
+ req->cdb[4] = nb_logical_blocks;
+ req->cdb[5] = 0;
+ io_header->cmd_len = 6;
+ } else if ((req->cmd >> 5) <= 1 && lba <= 0xffffffffULL) {
+ /* 10-byte CDB */
+ req->cdb[0] = (req->cmd & 0x1f) | 0x20;
+ req->cdb[1] = req->cdb1;
+ stl_be_p(&req->cdb[2], lba);
+ req->cdb[6] = req->group_number;
+ stw_be_p(&req->cdb[7], nb_logical_blocks);
+ req->cdb[9] = 0;
+ io_header->cmd_len = 10;
+ } else if ((req->cmd >> 5) != 4 && lba <= 0xffffffffULL) {
+ /* 12-byte CDB */
+ req->cdb[0] = (req->cmd & 0x1f) | 0xA0;
+ req->cdb[1] = req->cdb1;
+ stl_be_p(&req->cdb[2], lba);
+ stl_be_p(&req->cdb[6], nb_logical_blocks);
+ req->cdb[10] = req->group_number;
+ req->cdb[11] = 0;
+ io_header->cmd_len = 12;
+ } else {
+ /* 16-byte CDB */
+ req->cdb[0] = (req->cmd & 0x1f) | 0x80;
+ req->cdb[1] = req->cdb1;
+ stq_be_p(&req->cdb[2], lba);
+ stl_be_p(&req->cdb[10], nb_logical_blocks);
+ req->cdb[14] = req->group_number;
+ req->cdb[15] = 0;
+ io_header->cmd_len = 16;
+ }
+
+ /* The rest is as in scsi-generic.c. */
+ io_header->mx_sb_len = sizeof(r->req.sense);
+ io_header->sbp = r->req.sense;
+ io_header->timeout = UINT_MAX;
+ io_header->usr_ptr = r;
+ io_header->flags |= SG_FLAG_DIRECT_IO;
+
+ aiocb = blk_aio_ioctl(s->qdev.conf.blk, SG_IO, io_header, cb, opaque);
+ assert(aiocb != NULL);
+ return aiocb;
+}
+
+static bool scsi_block_no_fua(SCSICommand *cmd)
+{
+ return false;
+}
+
+static BlockAIOCB *scsi_block_dma_readv(int64_t offset,
+ QEMUIOVector *iov,
+ BlockCompletionFunc *cb, void *cb_opaque,
+ void *opaque)
+{
+ SCSIBlockReq *r = opaque;
+ return scsi_block_do_sgio(r, offset, iov,
+ SG_DXFER_FROM_DEV, cb, cb_opaque);
+}
+
+static BlockAIOCB *scsi_block_dma_writev(int64_t offset,
+ QEMUIOVector *iov,
+ BlockCompletionFunc *cb, void *cb_opaque,
+ void *opaque)
+{
+ SCSIBlockReq *r = opaque;
+ return scsi_block_do_sgio(r, offset, iov,
+ SG_DXFER_TO_DEV, cb, cb_opaque);
+}
+
static bool scsi_block_is_passthrough(SCSIDiskState *s, uint8_t *buf)
{
switch (buf[0]) {
+ case VERIFY_10:
+ case VERIFY_12:
+ case VERIFY_16:
+ /* Check if BYTCHK == 0x01 (data-out buffer contains data
+ * for the number of logical blocks specified in the length
+ * field). For other modes, do not use scatter/gather operation.
+ */
+ if ((buf[1] & 6) == 2) {
+ return false;
+ }
+ break;
+
case READ_6:
case READ_10:
case READ_12:
case READ_16:
- case VERIFY_10:
- case VERIFY_12:
- case VERIFY_16:
case WRITE_6:
case WRITE_10:
case WRITE_12:
case WRITE_VERIFY_10:
case WRITE_VERIFY_12:
case WRITE_VERIFY_16:
- /* If we are not using O_DIRECT, we might read stale data from the
- * host cache if writes were made using other commands than these
- * ones (such as WRITE SAME or EXTENDED COPY, etc.). So, without
- * O_DIRECT everything must go through SG_IO.
- */
- if (!(blk_get_flags(s->qdev.conf.blk) & BDRV_O_NOCACHE)) {
- break;
- }
-
- /* MMC writing cannot be done via pread/pwrite, because it sometimes
+ /* MMC writing cannot be done via DMA helpers, because it sometimes
* involves writing beyond the maximum LBA or to negative LBA (lead-in).
- * And once you do these writes, reading from the block device is
- * unreliable, too. It is even possible that reads deliver random data
- * from the host page cache (this is probably a Linux bug).
- *
* We might use scsi_disk_dma_reqops as long as no writing commands are
* seen, but performance usually isn't paramount on optical media. So,
* just make scsi-block operate the same as scsi-generic for them.
}
+static int32_t scsi_block_dma_command(SCSIRequest *req, uint8_t *buf)
+{
+ SCSIBlockReq *r = (SCSIBlockReq *)req;
+ r->cmd = req->cmd.buf[0];
+ switch (r->cmd >> 5) {
+ case 0:
+ /* 6-byte CDB. */
+ r->cdb1 = r->group_number = 0;
+ break;
+ case 1:
+ /* 10-byte CDB. */
+ r->cdb1 = req->cmd.buf[1];
+ r->group_number = req->cmd.buf[6];
+ break;
+ case 4:
+ /* 12-byte CDB. */
+ r->cdb1 = req->cmd.buf[1];
+ r->group_number = req->cmd.buf[10];
+ break;
+ case 5:
+ /* 16-byte CDB. */
+ r->cdb1 = req->cmd.buf[1];
+ r->group_number = req->cmd.buf[14];
+ break;
+ default:
+ abort();
+ }
+
+ if (r->cdb1 & 0xe0) {
+ /* Protection information is not supported. */
+ scsi_check_condition(&r->req, SENSE_CODE(INVALID_FIELD));
+ return 0;
+ }
+
+ r->req.status = &r->io_header.status;
+ return scsi_disk_dma_command(req, buf);
+}
+
+static const SCSIReqOps scsi_block_dma_reqops = {
+ .size = sizeof(SCSIBlockReq),
+ .free_req = scsi_free_request,
+ .send_command = scsi_block_dma_command,
+ .read_data = scsi_read_data,
+ .write_data = scsi_write_data,
+ .get_buf = scsi_get_buf,
+ .load_request = scsi_disk_load_request,
+ .save_request = scsi_disk_save_request,
+};
+
static SCSIRequest *scsi_block_new_request(SCSIDevice *d, uint32_t tag,
uint32_t lun, uint8_t *buf,
void *hba_private)
return scsi_req_alloc(&scsi_generic_req_ops, &s->qdev, tag, lun,
hba_private);
} else {
- return scsi_req_alloc(&scsi_disk_dma_reqops, &s->qdev, tag, lun,
+ return scsi_req_alloc(&scsi_block_dma_reqops, &s->qdev, tag, lun,
hba_private);
}
}
#endif
+static
+BlockAIOCB *scsi_dma_readv(int64_t offset, QEMUIOVector *iov,
+ BlockCompletionFunc *cb, void *cb_opaque,
+ void *opaque)
+{
+ SCSIDiskReq *r = opaque;
+ SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
+ return blk_aio_preadv(s->qdev.conf.blk, offset, iov, 0, cb, cb_opaque);
+}
+
+static
+BlockAIOCB *scsi_dma_writev(int64_t offset, QEMUIOVector *iov,
+ BlockCompletionFunc *cb, void *cb_opaque,
+ void *opaque)
+{
+ SCSIDiskReq *r = opaque;
+ SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
+ return blk_aio_pwritev(s->qdev.conf.blk, offset, iov, 0, cb, cb_opaque);
+}
+
+static void scsi_disk_base_class_initfn(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ SCSIDiskClass *sdc = SCSI_DISK_BASE_CLASS(klass);
+
+ dc->fw_name = "disk";
+ dc->reset = scsi_disk_reset;
+ sdc->dma_readv = scsi_dma_readv;
+ sdc->dma_writev = scsi_dma_writev;
+ sdc->need_fua_emulation = scsi_is_cmd_fua;
+}
+
+static const TypeInfo scsi_disk_base_info = {
+ .name = TYPE_SCSI_DISK_BASE,
+ .parent = TYPE_SCSI_DEVICE,
+ .class_init = scsi_disk_base_class_initfn,
+ .instance_size = sizeof(SCSIDiskState),
+ .class_size = sizeof(SCSIDiskClass),
+ .abstract = true,
+};
+
#define DEFINE_SCSI_DISK_PROPERTIES() \
DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf), \
+ DEFINE_BLOCK_ERROR_PROPERTIES(SCSIDiskState, qdev.conf), \
DEFINE_PROP_STRING("ver", SCSIDiskState, version), \
DEFINE_PROP_STRING("serial", SCSIDiskState, serial), \
DEFINE_PROP_STRING("vendor", SCSIDiskState, vendor), \
sc->realize = scsi_hd_realize;
sc->alloc_req = scsi_new_request;
sc->unit_attention_reported = scsi_disk_unit_attention_reported;
- dc->fw_name = "disk";
dc->desc = "virtual SCSI disk";
- dc->reset = scsi_disk_reset;
dc->props = scsi_hd_properties;
dc->vmsd = &vmstate_scsi_disk_state;
}
static const TypeInfo scsi_hd_info = {
.name = "scsi-hd",
- .parent = TYPE_SCSI_DEVICE,
- .instance_size = sizeof(SCSIDiskState),
+ .parent = TYPE_SCSI_DISK_BASE,
.class_init = scsi_hd_class_initfn,
};
sc->realize = scsi_cd_realize;
sc->alloc_req = scsi_new_request;
sc->unit_attention_reported = scsi_disk_unit_attention_reported;
- dc->fw_name = "disk";
dc->desc = "virtual SCSI CD-ROM";
- dc->reset = scsi_disk_reset;
dc->props = scsi_cd_properties;
dc->vmsd = &vmstate_scsi_disk_state;
}
static const TypeInfo scsi_cd_info = {
.name = "scsi-cd",
- .parent = TYPE_SCSI_DEVICE,
- .instance_size = sizeof(SCSIDiskState),
+ .parent = TYPE_SCSI_DISK_BASE,
.class_init = scsi_cd_class_initfn,
};
{
DeviceClass *dc = DEVICE_CLASS(klass);
SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
+ SCSIDiskClass *sdc = SCSI_DISK_BASE_CLASS(klass);
sc->realize = scsi_block_realize;
sc->alloc_req = scsi_block_new_request;
sc->parse_cdb = scsi_block_parse_cdb;
- dc->fw_name = "disk";
+ sdc->dma_readv = scsi_block_dma_readv;
+ sdc->dma_writev = scsi_block_dma_writev;
+ sdc->need_fua_emulation = scsi_block_no_fua;
dc->desc = "SCSI block device passthrough";
- dc->reset = scsi_disk_reset;
dc->props = scsi_block_properties;
dc->vmsd = &vmstate_scsi_disk_state;
}
static const TypeInfo scsi_block_info = {
.name = "scsi-block",
- .parent = TYPE_SCSI_DEVICE,
- .instance_size = sizeof(SCSIDiskState),
+ .parent = TYPE_SCSI_DISK_BASE,
.class_init = scsi_block_class_initfn,
};
#endif
static const TypeInfo scsi_disk_info = {
.name = "scsi-disk",
- .parent = TYPE_SCSI_DEVICE,
- .instance_size = sizeof(SCSIDiskState),
+ .parent = TYPE_SCSI_DISK_BASE,
.class_init = scsi_disk_class_initfn,
};
static void scsi_disk_register_types(void)
{
+ type_register_static(&scsi_disk_base_info);
type_register_static(&scsi_hd_info);
type_register_static(&scsi_cd_info);
#ifdef __linux__
projects / thirdparty / qemu.git / blobdiff