root / hw / scsi-disk.c @ b6c251ab
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/*
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* SCSI Device emulation
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*
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* Copyright (c) 2006 CodeSourcery.
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* Based on code by Fabrice Bellard
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*
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* Written by Paul Brook
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* Modifications:
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* 2009-Dec-12 Artyom Tarasenko : implemented stamdard inquiry for the case
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* when the allocation length of CDB is smaller
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* than 36.
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* 2009-Oct-13 Artyom Tarasenko : implemented the block descriptor in the
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* MODE SENSE response.
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*
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* This code is licensed under the LGPL.
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*
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* Note that this file only handles the SCSI architecture model and device
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* commands. Emulation of interface/link layer protocols is handled by
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* the host adapter emulator.
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*/
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//#define DEBUG_SCSI
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#ifdef DEBUG_SCSI
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#define DPRINTF(fmt, ...) \
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do { printf("scsi-disk: " fmt , ## __VA_ARGS__); } while (0) |
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#else
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#define DPRINTF(fmt, ...) do {} while(0) |
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#endif
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#define BADF(fmt, ...) \
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do { fprintf(stderr, "scsi-disk: " fmt , ## __VA_ARGS__); } while (0) |
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#include "qemu-common.h" |
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#include "qemu-error.h" |
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#include "scsi.h" |
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#include "scsi-defs.h" |
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#include "sysemu.h" |
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#include "blockdev.h" |
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#include "block_int.h" |
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#define SCSI_DMA_BUF_SIZE 131072 |
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#define SCSI_MAX_INQUIRY_LEN 256 |
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|
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#define SCSI_REQ_STATUS_RETRY 0x01 |
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#define SCSI_REQ_STATUS_RETRY_TYPE_MASK 0x06 |
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#define SCSI_REQ_STATUS_RETRY_READ 0x00 |
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#define SCSI_REQ_STATUS_RETRY_WRITE 0x02 |
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#define SCSI_REQ_STATUS_RETRY_FLUSH 0x04 |
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typedef struct SCSIDiskState SCSIDiskState; |
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typedef struct SCSIDiskReq { |
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SCSIRequest req; |
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/* Both sector and sector_count are in terms of qemu 512 byte blocks. */
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uint64_t sector; |
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uint32_t sector_count; |
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uint32_t buflen; |
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struct iovec iov;
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QEMUIOVector qiov; |
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uint32_t status; |
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BlockAcctCookie acct; |
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} SCSIDiskReq; |
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struct SCSIDiskState
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{
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SCSIDevice qdev; |
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BlockDriverState *bs; |
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/* The qemu block layer uses a fixed 512 byte sector size.
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This is the number of 512 byte blocks in a single scsi sector. */
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int cluster_size;
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uint32_t removable; |
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uint64_t max_lba; |
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bool media_changed;
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QEMUBH *bh; |
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char *version;
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char *serial;
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bool tray_open;
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bool tray_locked;
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}; |
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static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type); |
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static int scsi_disk_emulate_command(SCSIDiskReq *r); |
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static void scsi_free_request(SCSIRequest *req) |
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{
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SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
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if (r->iov.iov_base) {
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qemu_vfree(r->iov.iov_base); |
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} |
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} |
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|
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/* Helper function for command completion with sense. */
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static void scsi_check_condition(SCSIDiskReq *r, SCSISense sense) |
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{
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DPRINTF("Command complete tag=0x%x sense=%d/%d/%d\n",
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r->req.tag, sense.key, sense.asc, sense.ascq); |
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scsi_req_build_sense(&r->req, sense); |
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scsi_req_complete(&r->req, CHECK_CONDITION); |
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} |
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|
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/* Cancel a pending data transfer. */
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static void scsi_cancel_io(SCSIRequest *req) |
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{
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SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
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DPRINTF("Cancel tag=0x%x\n", req->tag);
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if (r->req.aiocb) {
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bdrv_aio_cancel(r->req.aiocb); |
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} |
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r->req.aiocb = NULL;
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} |
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static uint32_t scsi_init_iovec(SCSIDiskReq *r)
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{
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
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if (!r->iov.iov_base) {
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r->buflen = SCSI_DMA_BUF_SIZE; |
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r->iov.iov_base = qemu_blockalign(s->bs, r->buflen); |
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} |
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r->iov.iov_len = MIN(r->sector_count * 512, r->buflen);
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qemu_iovec_init_external(&r->qiov, &r->iov, 1);
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return r->qiov.size / 512; |
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} |
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static void scsi_read_complete(void * opaque, int ret) |
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{
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SCSIDiskReq *r = (SCSIDiskReq *)opaque; |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
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int n;
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if (r->req.aiocb != NULL) { |
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r->req.aiocb = NULL;
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bdrv_acct_done(s->bs, &r->acct); |
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} |
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if (ret) {
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if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_READ)) {
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return;
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} |
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} |
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DPRINTF("Data ready tag=0x%x len=%zd\n", r->req.tag, r->qiov.size);
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n = r->qiov.size / 512;
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r->sector += n; |
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r->sector_count -= n; |
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scsi_req_data(&r->req, r->qiov.size); |
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} |
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static void scsi_flush_complete(void * opaque, int ret) |
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{
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SCSIDiskReq *r = (SCSIDiskReq *)opaque; |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
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if (r->req.aiocb != NULL) { |
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r->req.aiocb = NULL;
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bdrv_acct_done(s->bs, &r->acct); |
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} |
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if (ret < 0) { |
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if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_FLUSH)) {
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return;
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} |
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} |
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scsi_req_complete(&r->req, GOOD); |
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} |
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/* Read more data from scsi device into buffer. */
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static void scsi_read_data(SCSIRequest *req) |
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{
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SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
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uint32_t n; |
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if (r->sector_count == (uint32_t)-1) { |
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DPRINTF("Read buf_len=%zd\n", r->iov.iov_len);
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r->sector_count = 0;
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scsi_req_data(&r->req, r->iov.iov_len); |
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return;
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} |
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DPRINTF("Read sector_count=%d\n", r->sector_count);
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if (r->sector_count == 0) { |
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/* This also clears the sense buffer for REQUEST SENSE. */
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scsi_req_complete(&r->req, GOOD); |
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return;
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} |
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/* No data transfer may already be in progress */
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assert(r->req.aiocb == NULL);
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if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
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DPRINTF("Data transfer direction invalid\n");
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scsi_read_complete(r, -EINVAL); |
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return;
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} |
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if (s->tray_open) {
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scsi_read_complete(r, -ENOMEDIUM); |
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} |
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n = scsi_init_iovec(r); |
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bdrv_acct_start(s->bs, &r->acct, n * BDRV_SECTOR_SIZE, BDRV_ACCT_READ); |
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r->req.aiocb = bdrv_aio_readv(s->bs, r->sector, &r->qiov, n, |
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scsi_read_complete, r); |
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if (r->req.aiocb == NULL) { |
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scsi_read_complete(r, -EIO); |
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} |
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} |
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static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type) |
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{
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int is_read = (type == SCSI_REQ_STATUS_RETRY_READ);
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
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BlockErrorAction action = bdrv_get_on_error(s->bs, is_read); |
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if (action == BLOCK_ERR_IGNORE) {
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bdrv_mon_event(s->bs, BDRV_ACTION_IGNORE, is_read); |
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return 0; |
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} |
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if ((error == ENOSPC && action == BLOCK_ERR_STOP_ENOSPC)
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|| action == BLOCK_ERR_STOP_ANY) {
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type &= SCSI_REQ_STATUS_RETRY_TYPE_MASK; |
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r->status |= SCSI_REQ_STATUS_RETRY | type; |
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bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read); |
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vm_stop(RUN_STATE_IO_ERROR); |
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bdrv_iostatus_set_err(s->bs, error); |
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} else {
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switch (error) {
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case ENOMEDIUM:
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scsi_check_condition(r, SENSE_CODE(NO_MEDIUM)); |
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break;
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case ENOMEM:
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scsi_check_condition(r, SENSE_CODE(TARGET_FAILURE)); |
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break;
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case EINVAL:
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scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); |
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break;
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default:
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scsi_check_condition(r, SENSE_CODE(IO_ERROR)); |
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break;
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} |
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bdrv_mon_event(s->bs, BDRV_ACTION_REPORT, is_read); |
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} |
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return 1; |
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} |
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|
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static void scsi_write_complete(void * opaque, int ret) |
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{
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SCSIDiskReq *r = (SCSIDiskReq *)opaque; |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
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uint32_t n; |
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if (r->req.aiocb != NULL) { |
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r->req.aiocb = NULL;
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bdrv_acct_done(s->bs, &r->acct); |
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} |
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if (ret) {
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if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_WRITE)) {
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return;
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} |
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} |
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n = r->qiov.size / 512;
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r->sector += n; |
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r->sector_count -= n; |
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if (r->sector_count == 0) { |
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scsi_req_complete(&r->req, GOOD); |
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} else {
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scsi_init_iovec(r); |
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DPRINTF("Write complete tag=0x%x more=%d\n", r->req.tag, r->qiov.size);
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scsi_req_data(&r->req, r->qiov.size); |
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} |
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} |
| 281 |
|
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static void scsi_write_data(SCSIRequest *req) |
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{
|
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SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
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uint32_t n; |
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|
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/* No data transfer may already be in progress */
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assert(r->req.aiocb == NULL);
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|
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if (r->req.cmd.mode != SCSI_XFER_TO_DEV) {
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DPRINTF("Data transfer direction invalid\n");
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scsi_write_complete(r, -EINVAL); |
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return;
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} |
| 296 |
|
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n = r->qiov.size / 512;
|
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if (n) {
|
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if (s->tray_open) {
|
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scsi_write_complete(r, -ENOMEDIUM); |
| 301 |
} |
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bdrv_acct_start(s->bs, &r->acct, n * BDRV_SECTOR_SIZE, BDRV_ACCT_WRITE); |
| 303 |
r->req.aiocb = bdrv_aio_writev(s->bs, r->sector, &r->qiov, n, |
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scsi_write_complete, r); |
| 305 |
if (r->req.aiocb == NULL) { |
| 306 |
scsi_write_complete(r, -ENOMEM); |
| 307 |
} |
| 308 |
} else {
|
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/* Called for the first time. Ask the driver to send us more data. */
|
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scsi_write_complete(r, 0);
|
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} |
| 312 |
} |
| 313 |
|
| 314 |
static void scsi_dma_restart_bh(void *opaque) |
| 315 |
{
|
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SCSIDiskState *s = opaque; |
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SCSIRequest *req; |
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SCSIDiskReq *r; |
| 319 |
|
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qemu_bh_delete(s->bh); |
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s->bh = NULL;
|
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|
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QTAILQ_FOREACH(req, &s->qdev.requests, next) {
|
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r = DO_UPCAST(SCSIDiskReq, req, req); |
| 325 |
if (r->status & SCSI_REQ_STATUS_RETRY) {
|
| 326 |
int status = r->status;
|
| 327 |
int ret;
|
| 328 |
|
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r->status &= |
| 330 |
~(SCSI_REQ_STATUS_RETRY | SCSI_REQ_STATUS_RETRY_TYPE_MASK); |
| 331 |
|
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switch (status & SCSI_REQ_STATUS_RETRY_TYPE_MASK) {
|
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case SCSI_REQ_STATUS_RETRY_READ:
|
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scsi_read_data(&r->req); |
| 335 |
break;
|
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case SCSI_REQ_STATUS_RETRY_WRITE:
|
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scsi_write_data(&r->req); |
| 338 |
break;
|
| 339 |
case SCSI_REQ_STATUS_RETRY_FLUSH:
|
| 340 |
ret = scsi_disk_emulate_command(r); |
| 341 |
if (ret == 0) { |
| 342 |
scsi_req_complete(&r->req, GOOD); |
| 343 |
} |
| 344 |
} |
| 345 |
} |
| 346 |
} |
| 347 |
} |
| 348 |
|
| 349 |
static void scsi_dma_restart_cb(void *opaque, int running, RunState state) |
| 350 |
{
|
| 351 |
SCSIDiskState *s = opaque; |
| 352 |
|
| 353 |
if (!running) {
|
| 354 |
return;
|
| 355 |
} |
| 356 |
if (!s->bh) {
|
| 357 |
s->bh = qemu_bh_new(scsi_dma_restart_bh, s); |
| 358 |
qemu_bh_schedule(s->bh); |
| 359 |
} |
| 360 |
} |
| 361 |
|
| 362 |
/* Return a pointer to the data buffer. */
|
| 363 |
static uint8_t *scsi_get_buf(SCSIRequest *req)
|
| 364 |
{
|
| 365 |
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
| 366 |
|
| 367 |
return (uint8_t *)r->iov.iov_base;
|
| 368 |
} |
| 369 |
|
| 370 |
static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf) |
| 371 |
{
|
| 372 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| 373 |
int buflen = 0; |
| 374 |
|
| 375 |
if (req->cmd.buf[1] & 0x2) { |
| 376 |
/* Command support data - optional, not implemented */
|
| 377 |
BADF("optional INQUIRY command support request not implemented\n");
|
| 378 |
return -1; |
| 379 |
} |
| 380 |
|
| 381 |
if (req->cmd.buf[1] & 0x1) { |
| 382 |
/* Vital product data */
|
| 383 |
uint8_t page_code = req->cmd.buf[2];
|
| 384 |
if (req->cmd.xfer < 4) { |
| 385 |
BADF("Error: Inquiry (EVPD[%02X]) buffer size %zd is "
|
| 386 |
"less than 4\n", page_code, req->cmd.xfer);
|
| 387 |
return -1; |
| 388 |
} |
| 389 |
|
| 390 |
if (s->qdev.type == TYPE_ROM) {
|
| 391 |
outbuf[buflen++] = 5;
|
| 392 |
} else {
|
| 393 |
outbuf[buflen++] = 0;
|
| 394 |
} |
| 395 |
outbuf[buflen++] = page_code ; // this page
|
| 396 |
outbuf[buflen++] = 0x00;
|
| 397 |
|
| 398 |
switch (page_code) {
|
| 399 |
case 0x00: /* Supported page codes, mandatory */ |
| 400 |
{
|
| 401 |
int pages;
|
| 402 |
DPRINTF("Inquiry EVPD[Supported pages] "
|
| 403 |
"buffer size %zd\n", req->cmd.xfer);
|
| 404 |
pages = buflen++; |
| 405 |
outbuf[buflen++] = 0x00; // list of supported pages (this page) |
| 406 |
if (s->serial) {
|
| 407 |
outbuf[buflen++] = 0x80; // unit serial number |
| 408 |
} |
| 409 |
outbuf[buflen++] = 0x83; // device identification |
| 410 |
if (s->qdev.type == TYPE_DISK) {
|
| 411 |
outbuf[buflen++] = 0xb0; // block limits |
| 412 |
outbuf[buflen++] = 0xb2; // thin provisioning |
| 413 |
} |
| 414 |
outbuf[pages] = buflen - pages - 1; // number of pages |
| 415 |
break;
|
| 416 |
} |
| 417 |
case 0x80: /* Device serial number, optional */ |
| 418 |
{
|
| 419 |
int l;
|
| 420 |
|
| 421 |
if (!s->serial) {
|
| 422 |
DPRINTF("Inquiry (EVPD[Serial number] not supported\n");
|
| 423 |
return -1; |
| 424 |
} |
| 425 |
|
| 426 |
l = strlen(s->serial); |
| 427 |
if (l > req->cmd.xfer) {
|
| 428 |
l = req->cmd.xfer; |
| 429 |
} |
| 430 |
if (l > 20) { |
| 431 |
l = 20;
|
| 432 |
} |
| 433 |
|
| 434 |
DPRINTF("Inquiry EVPD[Serial number] "
|
| 435 |
"buffer size %zd\n", req->cmd.xfer);
|
| 436 |
outbuf[buflen++] = l; |
| 437 |
memcpy(outbuf+buflen, s->serial, l); |
| 438 |
buflen += l; |
| 439 |
break;
|
| 440 |
} |
| 441 |
|
| 442 |
case 0x83: /* Device identification page, mandatory */ |
| 443 |
{
|
| 444 |
int max_len = 255 - 8; |
| 445 |
int id_len = strlen(bdrv_get_device_name(s->bs));
|
| 446 |
|
| 447 |
if (id_len > max_len) {
|
| 448 |
id_len = max_len; |
| 449 |
} |
| 450 |
DPRINTF("Inquiry EVPD[Device identification] "
|
| 451 |
"buffer size %zd\n", req->cmd.xfer);
|
| 452 |
|
| 453 |
outbuf[buflen++] = 4 + id_len;
|
| 454 |
outbuf[buflen++] = 0x2; // ASCII |
| 455 |
outbuf[buflen++] = 0; // not officially assigned |
| 456 |
outbuf[buflen++] = 0; // reserved |
| 457 |
outbuf[buflen++] = id_len; // length of data following
|
| 458 |
|
| 459 |
memcpy(outbuf+buflen, bdrv_get_device_name(s->bs), id_len); |
| 460 |
buflen += id_len; |
| 461 |
break;
|
| 462 |
} |
| 463 |
case 0xb0: /* block limits */ |
| 464 |
{
|
| 465 |
unsigned int unmap_sectors = |
| 466 |
s->qdev.conf.discard_granularity / s->qdev.blocksize; |
| 467 |
unsigned int min_io_size = |
| 468 |
s->qdev.conf.min_io_size / s->qdev.blocksize; |
| 469 |
unsigned int opt_io_size = |
| 470 |
s->qdev.conf.opt_io_size / s->qdev.blocksize; |
| 471 |
|
| 472 |
if (s->qdev.type == TYPE_ROM) {
|
| 473 |
DPRINTF("Inquiry (EVPD[%02X] not supported for CDROM\n",
|
| 474 |
page_code); |
| 475 |
return -1; |
| 476 |
} |
| 477 |
/* required VPD size with unmap support */
|
| 478 |
outbuf[3] = buflen = 0x3c; |
| 479 |
|
| 480 |
memset(outbuf + 4, 0, buflen - 4); |
| 481 |
|
| 482 |
/* optimal transfer length granularity */
|
| 483 |
outbuf[6] = (min_io_size >> 8) & 0xff; |
| 484 |
outbuf[7] = min_io_size & 0xff; |
| 485 |
|
| 486 |
/* optimal transfer length */
|
| 487 |
outbuf[12] = (opt_io_size >> 24) & 0xff; |
| 488 |
outbuf[13] = (opt_io_size >> 16) & 0xff; |
| 489 |
outbuf[14] = (opt_io_size >> 8) & 0xff; |
| 490 |
outbuf[15] = opt_io_size & 0xff; |
| 491 |
|
| 492 |
/* optimal unmap granularity */
|
| 493 |
outbuf[28] = (unmap_sectors >> 24) & 0xff; |
| 494 |
outbuf[29] = (unmap_sectors >> 16) & 0xff; |
| 495 |
outbuf[30] = (unmap_sectors >> 8) & 0xff; |
| 496 |
outbuf[31] = unmap_sectors & 0xff; |
| 497 |
break;
|
| 498 |
} |
| 499 |
case 0xb2: /* thin provisioning */ |
| 500 |
{
|
| 501 |
outbuf[3] = buflen = 8; |
| 502 |
outbuf[4] = 0; |
| 503 |
outbuf[5] = 0x40; /* write same with unmap supported */ |
| 504 |
outbuf[6] = 0; |
| 505 |
outbuf[7] = 0; |
| 506 |
break;
|
| 507 |
} |
| 508 |
default:
|
| 509 |
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
|
| 510 |
"buffer size %zd\n", page_code, req->cmd.xfer);
|
| 511 |
return -1; |
| 512 |
} |
| 513 |
/* done with EVPD */
|
| 514 |
return buflen;
|
| 515 |
} |
| 516 |
|
| 517 |
/* Standard INQUIRY data */
|
| 518 |
if (req->cmd.buf[2] != 0) { |
| 519 |
BADF("Error: Inquiry (STANDARD) page or code "
|
| 520 |
"is non-zero [%02X]\n", req->cmd.buf[2]); |
| 521 |
return -1; |
| 522 |
} |
| 523 |
|
| 524 |
/* PAGE CODE == 0 */
|
| 525 |
if (req->cmd.xfer < 5) { |
| 526 |
BADF("Error: Inquiry (STANDARD) buffer size %zd "
|
| 527 |
"is less than 5\n", req->cmd.xfer);
|
| 528 |
return -1; |
| 529 |
} |
| 530 |
|
| 531 |
buflen = req->cmd.xfer; |
| 532 |
if (buflen > SCSI_MAX_INQUIRY_LEN) {
|
| 533 |
buflen = SCSI_MAX_INQUIRY_LEN; |
| 534 |
} |
| 535 |
memset(outbuf, 0, buflen);
|
| 536 |
|
| 537 |
outbuf[0] = s->qdev.type & 0x1f; |
| 538 |
if (s->qdev.type == TYPE_ROM) {
|
| 539 |
outbuf[1] = 0x80; |
| 540 |
memcpy(&outbuf[16], "QEMU CD-ROM ", 16); |
| 541 |
} else {
|
| 542 |
outbuf[1] = s->removable ? 0x80 : 0; |
| 543 |
memcpy(&outbuf[16], "QEMU HARDDISK ", 16); |
| 544 |
} |
| 545 |
memcpy(&outbuf[8], "QEMU ", 8); |
| 546 |
memset(&outbuf[32], 0, 4); |
| 547 |
memcpy(&outbuf[32], s->version, MIN(4, strlen(s->version))); |
| 548 |
/*
|
| 549 |
* We claim conformance to SPC-3, which is required for guests
|
| 550 |
* to ask for modern features like READ CAPACITY(16) or the
|
| 551 |
* block characteristics VPD page by default. Not all of SPC-3
|
| 552 |
* is actually implemented, but we're good enough.
|
| 553 |
*/
|
| 554 |
outbuf[2] = 5; |
| 555 |
outbuf[3] = 2; /* Format 2 */ |
| 556 |
|
| 557 |
if (buflen > 36) { |
| 558 |
outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */ |
| 559 |
} else {
|
| 560 |
/* If the allocation length of CDB is too small,
|
| 561 |
the additional length is not adjusted */
|
| 562 |
outbuf[4] = 36 - 5; |
| 563 |
} |
| 564 |
|
| 565 |
/* Sync data transfer and TCQ. */
|
| 566 |
outbuf[7] = 0x10 | (req->bus->tcq ? 0x02 : 0); |
| 567 |
return buflen;
|
| 568 |
} |
| 569 |
|
| 570 |
static int scsi_read_dvd_structure(SCSIDiskState *s, SCSIDiskReq *r, |
| 571 |
uint8_t *outbuf) |
| 572 |
{
|
| 573 |
scsi_check_condition(r, SENSE_CODE(INVALID_OPCODE)); |
| 574 |
return -1; |
| 575 |
} |
| 576 |
|
| 577 |
static int scsi_get_event_status_notification(SCSIDiskState *s, |
| 578 |
SCSIDiskReq *r, uint8_t *outbuf) |
| 579 |
{
|
| 580 |
scsi_check_condition(r, SENSE_CODE(INVALID_OPCODE)); |
| 581 |
return -1; |
| 582 |
} |
| 583 |
|
| 584 |
static int scsi_get_configuration(SCSIDiskState *s, SCSIDiskReq *r, |
| 585 |
uint8_t *outbuf) |
| 586 |
{
|
| 587 |
if (s->qdev.type != TYPE_ROM) {
|
| 588 |
return -1; |
| 589 |
} |
| 590 |
memset(outbuf, 0, 8); |
| 591 |
/* ??? This should probably return much more information. For now
|
| 592 |
just return the basic header indicating the CD-ROM profile. */
|
| 593 |
outbuf[7] = 8; /* CD-ROM */ |
| 594 |
return 8; |
| 595 |
} |
| 596 |
|
| 597 |
static int scsi_emulate_mechanism_status(SCSIDiskState *s, uint8_t *outbuf) |
| 598 |
{
|
| 599 |
if (s->qdev.type != TYPE_ROM) {
|
| 600 |
return -1; |
| 601 |
} |
| 602 |
memset(outbuf, 0, 8); |
| 603 |
outbuf[5] = 1; /* CD-ROM */ |
| 604 |
return 8; |
| 605 |
} |
| 606 |
|
| 607 |
static int mode_sense_page(SCSIDiskState *s, int page, uint8_t **p_outbuf, |
| 608 |
int page_control)
|
| 609 |
{
|
| 610 |
BlockDriverState *bdrv = s->bs; |
| 611 |
int cylinders, heads, secs;
|
| 612 |
uint8_t *p = *p_outbuf; |
| 613 |
|
| 614 |
/*
|
| 615 |
* If Changeable Values are requested, a mask denoting those mode parameters
|
| 616 |
* that are changeable shall be returned. As we currently don't support
|
| 617 |
* parameter changes via MODE_SELECT all bits are returned set to zero.
|
| 618 |
* The buffer was already menset to zero by the caller of this function.
|
| 619 |
*/
|
| 620 |
switch (page) {
|
| 621 |
case MODE_PAGE_HD_GEOMETRY:
|
| 622 |
if (s->qdev.type == TYPE_ROM) {
|
| 623 |
return -1; |
| 624 |
} |
| 625 |
p[0] = 4; |
| 626 |
p[1] = 0x16; |
| 627 |
if (page_control == 1) { /* Changeable Values */ |
| 628 |
break;
|
| 629 |
} |
| 630 |
/* if a geometry hint is available, use it */
|
| 631 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
| 632 |
p[2] = (cylinders >> 16) & 0xff; |
| 633 |
p[3] = (cylinders >> 8) & 0xff; |
| 634 |
p[4] = cylinders & 0xff; |
| 635 |
p[5] = heads & 0xff; |
| 636 |
/* Write precomp start cylinder, disabled */
|
| 637 |
p[6] = (cylinders >> 16) & 0xff; |
| 638 |
p[7] = (cylinders >> 8) & 0xff; |
| 639 |
p[8] = cylinders & 0xff; |
| 640 |
/* Reduced current start cylinder, disabled */
|
| 641 |
p[9] = (cylinders >> 16) & 0xff; |
| 642 |
p[10] = (cylinders >> 8) & 0xff; |
| 643 |
p[11] = cylinders & 0xff; |
| 644 |
/* Device step rate [ns], 200ns */
|
| 645 |
p[12] = 0; |
| 646 |
p[13] = 200; |
| 647 |
/* Landing zone cylinder */
|
| 648 |
p[14] = 0xff; |
| 649 |
p[15] = 0xff; |
| 650 |
p[16] = 0xff; |
| 651 |
/* Medium rotation rate [rpm], 5400 rpm */
|
| 652 |
p[20] = (5400 >> 8) & 0xff; |
| 653 |
p[21] = 5400 & 0xff; |
| 654 |
break;
|
| 655 |
|
| 656 |
case MODE_PAGE_FLEXIBLE_DISK_GEOMETRY:
|
| 657 |
if (s->qdev.type == TYPE_ROM) {
|
| 658 |
return -1; |
| 659 |
} |
| 660 |
p[0] = 5; |
| 661 |
p[1] = 0x1e; |
| 662 |
if (page_control == 1) { /* Changeable Values */ |
| 663 |
break;
|
| 664 |
} |
| 665 |
/* Transfer rate [kbit/s], 5Mbit/s */
|
| 666 |
p[2] = 5000 >> 8; |
| 667 |
p[3] = 5000 & 0xff; |
| 668 |
/* if a geometry hint is available, use it */
|
| 669 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
| 670 |
p[4] = heads & 0xff; |
| 671 |
p[5] = secs & 0xff; |
| 672 |
p[6] = s->cluster_size * 2; |
| 673 |
p[8] = (cylinders >> 8) & 0xff; |
| 674 |
p[9] = cylinders & 0xff; |
| 675 |
/* Write precomp start cylinder, disabled */
|
| 676 |
p[10] = (cylinders >> 8) & 0xff; |
| 677 |
p[11] = cylinders & 0xff; |
| 678 |
/* Reduced current start cylinder, disabled */
|
| 679 |
p[12] = (cylinders >> 8) & 0xff; |
| 680 |
p[13] = cylinders & 0xff; |
| 681 |
/* Device step rate [100us], 100us */
|
| 682 |
p[14] = 0; |
| 683 |
p[15] = 1; |
| 684 |
/* Device step pulse width [us], 1us */
|
| 685 |
p[16] = 1; |
| 686 |
/* Device head settle delay [100us], 100us */
|
| 687 |
p[17] = 0; |
| 688 |
p[18] = 1; |
| 689 |
/* Motor on delay [0.1s], 0.1s */
|
| 690 |
p[19] = 1; |
| 691 |
/* Motor off delay [0.1s], 0.1s */
|
| 692 |
p[20] = 1; |
| 693 |
/* Medium rotation rate [rpm], 5400 rpm */
|
| 694 |
p[28] = (5400 >> 8) & 0xff; |
| 695 |
p[29] = 5400 & 0xff; |
| 696 |
break;
|
| 697 |
|
| 698 |
case MODE_PAGE_CACHING:
|
| 699 |
p[0] = 8; |
| 700 |
p[1] = 0x12; |
| 701 |
if (page_control == 1) { /* Changeable Values */ |
| 702 |
break;
|
| 703 |
} |
| 704 |
if (bdrv_enable_write_cache(s->bs)) {
|
| 705 |
p[2] = 4; /* WCE */ |
| 706 |
} |
| 707 |
break;
|
| 708 |
|
| 709 |
case MODE_PAGE_CAPABILITIES:
|
| 710 |
if (s->qdev.type != TYPE_ROM) {
|
| 711 |
return -1; |
| 712 |
} |
| 713 |
p[0] = 0x2a; |
| 714 |
p[1] = 0x14; |
| 715 |
if (page_control == 1) { /* Changeable Values */ |
| 716 |
break;
|
| 717 |
} |
| 718 |
p[2] = 3; // CD-R & CD-RW read |
| 719 |
p[3] = 0; // Writing not supported |
| 720 |
p[4] = 0x7f; /* Audio, composite, digital out, |
| 721 |
mode 2 form 1&2, multi session */
|
| 722 |
p[5] = 0xff; /* CD DA, DA accurate, RW supported, |
| 723 |
RW corrected, C2 errors, ISRC,
|
| 724 |
UPC, Bar code */
|
| 725 |
p[6] = 0x2d | (s->tray_locked ? 2 : 0); |
| 726 |
/* Locking supported, jumper present, eject, tray */
|
| 727 |
p[7] = 0; /* no volume & mute control, no |
| 728 |
changer */
|
| 729 |
p[8] = (50 * 176) >> 8; // 50x read speed |
| 730 |
p[9] = (50 * 176) & 0xff; |
| 731 |
p[10] = 0 >> 8; // No volume |
| 732 |
p[11] = 0 & 0xff; |
| 733 |
p[12] = 2048 >> 8; // 2M buffer |
| 734 |
p[13] = 2048 & 0xff; |
| 735 |
p[14] = (16 * 176) >> 8; // 16x read speed current |
| 736 |
p[15] = (16 * 176) & 0xff; |
| 737 |
p[18] = (16 * 176) >> 8; // 16x write speed |
| 738 |
p[19] = (16 * 176) & 0xff; |
| 739 |
p[20] = (16 * 176) >> 8; // 16x write speed current |
| 740 |
p[21] = (16 * 176) & 0xff; |
| 741 |
break;
|
| 742 |
|
| 743 |
default:
|
| 744 |
return -1; |
| 745 |
} |
| 746 |
|
| 747 |
*p_outbuf += p[1] + 2; |
| 748 |
return p[1] + 2; |
| 749 |
} |
| 750 |
|
| 751 |
static int scsi_disk_emulate_mode_sense(SCSIDiskReq *r, uint8_t *outbuf) |
| 752 |
{
|
| 753 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
| 754 |
uint64_t nb_sectors; |
| 755 |
int page, dbd, buflen, ret, page_control;
|
| 756 |
uint8_t *p; |
| 757 |
uint8_t dev_specific_param; |
| 758 |
|
| 759 |
dbd = r->req.cmd.buf[1] & 0x8; |
| 760 |
page = r->req.cmd.buf[2] & 0x3f; |
| 761 |
page_control = (r->req.cmd.buf[2] & 0xc0) >> 6; |
| 762 |
DPRINTF("Mode Sense(%d) (page %d, xfer %zd, page_control %d)\n",
|
| 763 |
(r->req.cmd.buf[0] == MODE_SENSE) ? 6 : 10, page, r->req.cmd.xfer, page_control); |
| 764 |
memset(outbuf, 0, r->req.cmd.xfer);
|
| 765 |
p = outbuf; |
| 766 |
|
| 767 |
if (bdrv_is_read_only(s->bs)) {
|
| 768 |
dev_specific_param = 0x80; /* Readonly. */ |
| 769 |
} else {
|
| 770 |
dev_specific_param = 0x00;
|
| 771 |
} |
| 772 |
|
| 773 |
if (r->req.cmd.buf[0] == MODE_SENSE) { |
| 774 |
p[1] = 0; /* Default media type. */ |
| 775 |
p[2] = dev_specific_param;
|
| 776 |
p[3] = 0; /* Block descriptor length. */ |
| 777 |
p += 4;
|
| 778 |
} else { /* MODE_SENSE_10 */ |
| 779 |
p[2] = 0; /* Default media type. */ |
| 780 |
p[3] = dev_specific_param;
|
| 781 |
p[6] = p[7] = 0; /* Block descriptor length. */ |
| 782 |
p += 8;
|
| 783 |
} |
| 784 |
|
| 785 |
bdrv_get_geometry(s->bs, &nb_sectors); |
| 786 |
if (!dbd && nb_sectors) {
|
| 787 |
if (r->req.cmd.buf[0] == MODE_SENSE) { |
| 788 |
outbuf[3] = 8; /* Block descriptor length */ |
| 789 |
} else { /* MODE_SENSE_10 */ |
| 790 |
outbuf[7] = 8; /* Block descriptor length */ |
| 791 |
} |
| 792 |
nb_sectors /= s->cluster_size; |
| 793 |
if (nb_sectors > 0xffffff) { |
| 794 |
nb_sectors = 0;
|
| 795 |
} |
| 796 |
p[0] = 0; /* media density code */ |
| 797 |
p[1] = (nb_sectors >> 16) & 0xff; |
| 798 |
p[2] = (nb_sectors >> 8) & 0xff; |
| 799 |
p[3] = nb_sectors & 0xff; |
| 800 |
p[4] = 0; /* reserved */ |
| 801 |
p[5] = 0; /* bytes 5-7 are the sector size in bytes */ |
| 802 |
p[6] = s->cluster_size * 2; |
| 803 |
p[7] = 0; |
| 804 |
p += 8;
|
| 805 |
} |
| 806 |
|
| 807 |
if (page_control == 3) { |
| 808 |
/* Saved Values */
|
| 809 |
scsi_check_condition(r, SENSE_CODE(SAVING_PARAMS_NOT_SUPPORTED)); |
| 810 |
return -1; |
| 811 |
} |
| 812 |
|
| 813 |
if (page == 0x3f) { |
| 814 |
for (page = 0; page <= 0x3e; page++) { |
| 815 |
mode_sense_page(s, page, &p, page_control); |
| 816 |
} |
| 817 |
} else {
|
| 818 |
ret = mode_sense_page(s, page, &p, page_control); |
| 819 |
if (ret == -1) { |
| 820 |
return -1; |
| 821 |
} |
| 822 |
} |
| 823 |
|
| 824 |
buflen = p - outbuf; |
| 825 |
/*
|
| 826 |
* The mode data length field specifies the length in bytes of the
|
| 827 |
* following data that is available to be transferred. The mode data
|
| 828 |
* length does not include itself.
|
| 829 |
*/
|
| 830 |
if (r->req.cmd.buf[0] == MODE_SENSE) { |
| 831 |
outbuf[0] = buflen - 1; |
| 832 |
} else { /* MODE_SENSE_10 */ |
| 833 |
outbuf[0] = ((buflen - 2) >> 8) & 0xff; |
| 834 |
outbuf[1] = (buflen - 2) & 0xff; |
| 835 |
} |
| 836 |
if (buflen > r->req.cmd.xfer) {
|
| 837 |
buflen = r->req.cmd.xfer; |
| 838 |
} |
| 839 |
return buflen;
|
| 840 |
} |
| 841 |
|
| 842 |
static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf) |
| 843 |
{
|
| 844 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| 845 |
int start_track, format, msf, toclen;
|
| 846 |
uint64_t nb_sectors; |
| 847 |
|
| 848 |
msf = req->cmd.buf[1] & 2; |
| 849 |
format = req->cmd.buf[2] & 0xf; |
| 850 |
start_track = req->cmd.buf[6];
|
| 851 |
bdrv_get_geometry(s->bs, &nb_sectors); |
| 852 |
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
| 853 |
nb_sectors /= s->cluster_size; |
| 854 |
switch (format) {
|
| 855 |
case 0: |
| 856 |
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); |
| 857 |
break;
|
| 858 |
case 1: |
| 859 |
/* multi session : only a single session defined */
|
| 860 |
toclen = 12;
|
| 861 |
memset(outbuf, 0, 12); |
| 862 |
outbuf[1] = 0x0a; |
| 863 |
outbuf[2] = 0x01; |
| 864 |
outbuf[3] = 0x01; |
| 865 |
break;
|
| 866 |
case 2: |
| 867 |
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); |
| 868 |
break;
|
| 869 |
default:
|
| 870 |
return -1; |
| 871 |
} |
| 872 |
if (toclen > req->cmd.xfer) {
|
| 873 |
toclen = req->cmd.xfer; |
| 874 |
} |
| 875 |
return toclen;
|
| 876 |
} |
| 877 |
|
| 878 |
static int scsi_disk_emulate_start_stop(SCSIDiskReq *r) |
| 879 |
{
|
| 880 |
SCSIRequest *req = &r->req; |
| 881 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| 882 |
bool start = req->cmd.buf[4] & 1; |
| 883 |
bool loej = req->cmd.buf[4] & 2; /* load on start, eject on !start */ |
| 884 |
|
| 885 |
if (s->qdev.type == TYPE_ROM && loej) {
|
| 886 |
if (!start && !s->tray_open && s->tray_locked) {
|
| 887 |
scsi_check_condition(r, |
| 888 |
bdrv_is_inserted(s->bs) |
| 889 |
? SENSE_CODE(ILLEGAL_REQ_REMOVAL_PREVENTED) |
| 890 |
: SENSE_CODE(NOT_READY_REMOVAL_PREVENTED)); |
| 891 |
return -1; |
| 892 |
} |
| 893 |
bdrv_eject(s->bs, !start); |
| 894 |
s->tray_open = !start; |
| 895 |
} |
| 896 |
return 0; |
| 897 |
} |
| 898 |
|
| 899 |
static int scsi_disk_emulate_command(SCSIDiskReq *r) |
| 900 |
{
|
| 901 |
SCSIRequest *req = &r->req; |
| 902 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| 903 |
uint64_t nb_sectors; |
| 904 |
uint8_t *outbuf; |
| 905 |
int buflen = 0; |
| 906 |
|
| 907 |
if (!r->iov.iov_base) {
|
| 908 |
/*
|
| 909 |
* FIXME: we shouldn't return anything bigger than 4k, but the code
|
| 910 |
* requires the buffer to be as big as req->cmd.xfer in several
|
| 911 |
* places. So, do not allow CDBs with a very large ALLOCATION
|
| 912 |
* LENGTH. The real fix would be to modify scsi_read_data and
|
| 913 |
* dma_buf_read, so that they return data beyond the buflen
|
| 914 |
* as all zeros.
|
| 915 |
*/
|
| 916 |
if (req->cmd.xfer > 65536) { |
| 917 |
goto illegal_request;
|
| 918 |
} |
| 919 |
r->buflen = MAX(4096, req->cmd.xfer);
|
| 920 |
r->iov.iov_base = qemu_blockalign(s->bs, r->buflen); |
| 921 |
} |
| 922 |
|
| 923 |
outbuf = r->iov.iov_base; |
| 924 |
switch (req->cmd.buf[0]) { |
| 925 |
case TEST_UNIT_READY:
|
| 926 |
if (s->tray_open || !bdrv_is_inserted(s->bs)) {
|
| 927 |
goto not_ready;
|
| 928 |
} |
| 929 |
break;
|
| 930 |
case INQUIRY:
|
| 931 |
buflen = scsi_disk_emulate_inquiry(req, outbuf); |
| 932 |
if (buflen < 0) { |
| 933 |
goto illegal_request;
|
| 934 |
} |
| 935 |
break;
|
| 936 |
case MODE_SENSE:
|
| 937 |
case MODE_SENSE_10:
|
| 938 |
buflen = scsi_disk_emulate_mode_sense(r, outbuf); |
| 939 |
if (buflen < 0) { |
| 940 |
goto illegal_request;
|
| 941 |
} |
| 942 |
break;
|
| 943 |
case READ_TOC:
|
| 944 |
buflen = scsi_disk_emulate_read_toc(req, outbuf); |
| 945 |
if (buflen < 0) { |
| 946 |
goto illegal_request;
|
| 947 |
} |
| 948 |
break;
|
| 949 |
case RESERVE:
|
| 950 |
if (req->cmd.buf[1] & 1) { |
| 951 |
goto illegal_request;
|
| 952 |
} |
| 953 |
break;
|
| 954 |
case RESERVE_10:
|
| 955 |
if (req->cmd.buf[1] & 3) { |
| 956 |
goto illegal_request;
|
| 957 |
} |
| 958 |
break;
|
| 959 |
case RELEASE:
|
| 960 |
if (req->cmd.buf[1] & 1) { |
| 961 |
goto illegal_request;
|
| 962 |
} |
| 963 |
break;
|
| 964 |
case RELEASE_10:
|
| 965 |
if (req->cmd.buf[1] & 3) { |
| 966 |
goto illegal_request;
|
| 967 |
} |
| 968 |
break;
|
| 969 |
case START_STOP:
|
| 970 |
if (scsi_disk_emulate_start_stop(r) < 0) { |
| 971 |
return -1; |
| 972 |
} |
| 973 |
break;
|
| 974 |
case ALLOW_MEDIUM_REMOVAL:
|
| 975 |
s->tray_locked = req->cmd.buf[4] & 1; |
| 976 |
bdrv_lock_medium(s->bs, req->cmd.buf[4] & 1); |
| 977 |
break;
|
| 978 |
case READ_CAPACITY_10:
|
| 979 |
/* The normal LEN field for this command is zero. */
|
| 980 |
memset(outbuf, 0, 8); |
| 981 |
bdrv_get_geometry(s->bs, &nb_sectors); |
| 982 |
if (!nb_sectors) {
|
| 983 |
goto not_ready;
|
| 984 |
} |
| 985 |
nb_sectors /= s->cluster_size; |
| 986 |
/* Returned value is the address of the last sector. */
|
| 987 |
nb_sectors--; |
| 988 |
/* Remember the new size for read/write sanity checking. */
|
| 989 |
s->max_lba = nb_sectors; |
| 990 |
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
|
| 991 |
if (nb_sectors > UINT32_MAX) {
|
| 992 |
nb_sectors = UINT32_MAX; |
| 993 |
} |
| 994 |
outbuf[0] = (nb_sectors >> 24) & 0xff; |
| 995 |
outbuf[1] = (nb_sectors >> 16) & 0xff; |
| 996 |
outbuf[2] = (nb_sectors >> 8) & 0xff; |
| 997 |
outbuf[3] = nb_sectors & 0xff; |
| 998 |
outbuf[4] = 0; |
| 999 |
outbuf[5] = 0; |
| 1000 |
outbuf[6] = s->cluster_size * 2; |
| 1001 |
outbuf[7] = 0; |
| 1002 |
buflen = 8;
|
| 1003 |
break;
|
| 1004 |
case MECHANISM_STATUS:
|
| 1005 |
buflen = scsi_emulate_mechanism_status(s, outbuf); |
| 1006 |
if (buflen < 0) { |
| 1007 |
goto illegal_request;
|
| 1008 |
} |
| 1009 |
break;
|
| 1010 |
case GET_CONFIGURATION:
|
| 1011 |
buflen = scsi_get_configuration(s, r, outbuf); |
| 1012 |
if (buflen < 0) { |
| 1013 |
goto illegal_request;
|
| 1014 |
} |
| 1015 |
break;
|
| 1016 |
case GET_EVENT_STATUS_NOTIFICATION:
|
| 1017 |
buflen = scsi_get_event_status_notification(s, r, outbuf); |
| 1018 |
if (buflen < 0) { |
| 1019 |
goto illegal_request;
|
| 1020 |
} |
| 1021 |
break;
|
| 1022 |
case READ_DVD_STRUCTURE:
|
| 1023 |
buflen = scsi_read_dvd_structure(s, r, outbuf); |
| 1024 |
if (buflen < 0) { |
| 1025 |
goto illegal_request;
|
| 1026 |
} |
| 1027 |
break;
|
| 1028 |
case SERVICE_ACTION_IN_16:
|
| 1029 |
/* Service Action In subcommands. */
|
| 1030 |
if ((req->cmd.buf[1] & 31) == SAI_READ_CAPACITY_16) { |
| 1031 |
DPRINTF("SAI READ CAPACITY(16)\n");
|
| 1032 |
memset(outbuf, 0, req->cmd.xfer);
|
| 1033 |
bdrv_get_geometry(s->bs, &nb_sectors); |
| 1034 |
if (!nb_sectors) {
|
| 1035 |
goto not_ready;
|
| 1036 |
} |
| 1037 |
nb_sectors /= s->cluster_size; |
| 1038 |
/* Returned value is the address of the last sector. */
|
| 1039 |
nb_sectors--; |
| 1040 |
/* Remember the new size for read/write sanity checking. */
|
| 1041 |
s->max_lba = nb_sectors; |
| 1042 |
outbuf[0] = (nb_sectors >> 56) & 0xff; |
| 1043 |
outbuf[1] = (nb_sectors >> 48) & 0xff; |
| 1044 |
outbuf[2] = (nb_sectors >> 40) & 0xff; |
| 1045 |
outbuf[3] = (nb_sectors >> 32) & 0xff; |
| 1046 |
outbuf[4] = (nb_sectors >> 24) & 0xff; |
| 1047 |
outbuf[5] = (nb_sectors >> 16) & 0xff; |
| 1048 |
outbuf[6] = (nb_sectors >> 8) & 0xff; |
| 1049 |
outbuf[7] = nb_sectors & 0xff; |
| 1050 |
outbuf[8] = 0; |
| 1051 |
outbuf[9] = 0; |
| 1052 |
outbuf[10] = s->cluster_size * 2; |
| 1053 |
outbuf[11] = 0; |
| 1054 |
outbuf[12] = 0; |
| 1055 |
outbuf[13] = get_physical_block_exp(&s->qdev.conf);
|
| 1056 |
|
| 1057 |
/* set TPE bit if the format supports discard */
|
| 1058 |
if (s->qdev.conf.discard_granularity) {
|
| 1059 |
outbuf[14] = 0x80; |
| 1060 |
} |
| 1061 |
|
| 1062 |
/* Protection, exponent and lowest lba field left blank. */
|
| 1063 |
buflen = req->cmd.xfer; |
| 1064 |
break;
|
| 1065 |
} |
| 1066 |
DPRINTF("Unsupported Service Action In\n");
|
| 1067 |
goto illegal_request;
|
| 1068 |
case VERIFY_10:
|
| 1069 |
break;
|
| 1070 |
default:
|
| 1071 |
scsi_check_condition(r, SENSE_CODE(INVALID_OPCODE)); |
| 1072 |
return -1; |
| 1073 |
} |
| 1074 |
return buflen;
|
| 1075 |
|
| 1076 |
not_ready:
|
| 1077 |
if (s->tray_open || !bdrv_is_inserted(s->bs)) {
|
| 1078 |
scsi_check_condition(r, SENSE_CODE(NO_MEDIUM)); |
| 1079 |
} else {
|
| 1080 |
scsi_check_condition(r, SENSE_CODE(LUN_NOT_READY)); |
| 1081 |
} |
| 1082 |
return -1; |
| 1083 |
|
| 1084 |
illegal_request:
|
| 1085 |
if (r->req.status == -1) { |
| 1086 |
scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); |
| 1087 |
} |
| 1088 |
return -1; |
| 1089 |
} |
| 1090 |
|
| 1091 |
/* Execute a scsi command. Returns the length of the data expected by the
|
| 1092 |
command. This will be Positive for data transfers from the device
|
| 1093 |
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
| 1094 |
and zero if the command does not transfer any data. */
|
| 1095 |
|
| 1096 |
static int32_t scsi_send_command(SCSIRequest *req, uint8_t *buf)
|
| 1097 |
{
|
| 1098 |
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
| 1099 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| 1100 |
int32_t len; |
| 1101 |
uint8_t command; |
| 1102 |
int rc;
|
| 1103 |
|
| 1104 |
command = buf[0];
|
| 1105 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", req->lun, req->tag, buf[0]); |
| 1106 |
|
| 1107 |
#ifdef DEBUG_SCSI
|
| 1108 |
{
|
| 1109 |
int i;
|
| 1110 |
for (i = 1; i < r->req.cmd.len; i++) { |
| 1111 |
printf(" 0x%02x", buf[i]);
|
| 1112 |
} |
| 1113 |
printf("\n");
|
| 1114 |
} |
| 1115 |
#endif
|
| 1116 |
|
| 1117 |
switch (command) {
|
| 1118 |
case TEST_UNIT_READY:
|
| 1119 |
case INQUIRY:
|
| 1120 |
case MODE_SENSE:
|
| 1121 |
case MODE_SENSE_10:
|
| 1122 |
case RESERVE:
|
| 1123 |
case RESERVE_10:
|
| 1124 |
case RELEASE:
|
| 1125 |
case RELEASE_10:
|
| 1126 |
case START_STOP:
|
| 1127 |
case ALLOW_MEDIUM_REMOVAL:
|
| 1128 |
case READ_CAPACITY_10:
|
| 1129 |
case READ_TOC:
|
| 1130 |
case READ_DVD_STRUCTURE:
|
| 1131 |
case GET_CONFIGURATION:
|
| 1132 |
case GET_EVENT_STATUS_NOTIFICATION:
|
| 1133 |
case MECHANISM_STATUS:
|
| 1134 |
case SERVICE_ACTION_IN_16:
|
| 1135 |
case VERIFY_10:
|
| 1136 |
rc = scsi_disk_emulate_command(r); |
| 1137 |
if (rc < 0) { |
| 1138 |
return 0; |
| 1139 |
} |
| 1140 |
|
| 1141 |
r->iov.iov_len = rc; |
| 1142 |
break;
|
| 1143 |
case SYNCHRONIZE_CACHE:
|
| 1144 |
bdrv_acct_start(s->bs, &r->acct, 0, BDRV_ACCT_FLUSH);
|
| 1145 |
r->req.aiocb = bdrv_aio_flush(s->bs, scsi_flush_complete, r); |
| 1146 |
if (r->req.aiocb == NULL) { |
| 1147 |
scsi_flush_complete(r, -EIO); |
| 1148 |
} |
| 1149 |
return 0; |
| 1150 |
case READ_6:
|
| 1151 |
case READ_10:
|
| 1152 |
case READ_12:
|
| 1153 |
case READ_16:
|
| 1154 |
len = r->req.cmd.xfer / s->qdev.blocksize; |
| 1155 |
DPRINTF("Read (sector %" PRId64 ", count %d)\n", r->req.cmd.lba, len); |
| 1156 |
if (r->req.cmd.lba > s->max_lba) {
|
| 1157 |
goto illegal_lba;
|
| 1158 |
} |
| 1159 |
r->sector = r->req.cmd.lba * s->cluster_size; |
| 1160 |
r->sector_count = len * s->cluster_size; |
| 1161 |
break;
|
| 1162 |
case WRITE_6:
|
| 1163 |
case WRITE_10:
|
| 1164 |
case WRITE_12:
|
| 1165 |
case WRITE_16:
|
| 1166 |
case WRITE_VERIFY_10:
|
| 1167 |
case WRITE_VERIFY_12:
|
| 1168 |
case WRITE_VERIFY_16:
|
| 1169 |
len = r->req.cmd.xfer / s->qdev.blocksize; |
| 1170 |
DPRINTF("Write %s(sector %" PRId64 ", count %d)\n", |
| 1171 |
(command & 0xe) == 0xe ? "And Verify " : "", |
| 1172 |
r->req.cmd.lba, len); |
| 1173 |
if (r->req.cmd.lba > s->max_lba) {
|
| 1174 |
goto illegal_lba;
|
| 1175 |
} |
| 1176 |
r->sector = r->req.cmd.lba * s->cluster_size; |
| 1177 |
r->sector_count = len * s->cluster_size; |
| 1178 |
break;
|
| 1179 |
case MODE_SELECT:
|
| 1180 |
DPRINTF("Mode Select(6) (len %lu)\n", (long)r->req.cmd.xfer); |
| 1181 |
/* We don't support mode parameter changes.
|
| 1182 |
Allow the mode parameter header + block descriptors only. */
|
| 1183 |
if (r->req.cmd.xfer > 12) { |
| 1184 |
goto fail;
|
| 1185 |
} |
| 1186 |
break;
|
| 1187 |
case MODE_SELECT_10:
|
| 1188 |
DPRINTF("Mode Select(10) (len %lu)\n", (long)r->req.cmd.xfer); |
| 1189 |
/* We don't support mode parameter changes.
|
| 1190 |
Allow the mode parameter header + block descriptors only. */
|
| 1191 |
if (r->req.cmd.xfer > 16) { |
| 1192 |
goto fail;
|
| 1193 |
} |
| 1194 |
break;
|
| 1195 |
case SEEK_6:
|
| 1196 |
case SEEK_10:
|
| 1197 |
DPRINTF("Seek(%d) (sector %" PRId64 ")\n", command == SEEK_6 ? 6 : 10, |
| 1198 |
r->req.cmd.lba); |
| 1199 |
if (r->req.cmd.lba > s->max_lba) {
|
| 1200 |
goto illegal_lba;
|
| 1201 |
} |
| 1202 |
break;
|
| 1203 |
case WRITE_SAME_16:
|
| 1204 |
len = r->req.cmd.xfer / s->qdev.blocksize; |
| 1205 |
|
| 1206 |
DPRINTF("WRITE SAME(16) (sector %" PRId64 ", count %d)\n", |
| 1207 |
r->req.cmd.lba, len); |
| 1208 |
|
| 1209 |
if (r->req.cmd.lba > s->max_lba) {
|
| 1210 |
goto illegal_lba;
|
| 1211 |
} |
| 1212 |
|
| 1213 |
/*
|
| 1214 |
* We only support WRITE SAME with the unmap bit set for now.
|
| 1215 |
*/
|
| 1216 |
if (!(buf[1] & 0x8)) { |
| 1217 |
goto fail;
|
| 1218 |
} |
| 1219 |
|
| 1220 |
rc = bdrv_discard(s->bs, r->req.cmd.lba * s->cluster_size, |
| 1221 |
len * s->cluster_size); |
| 1222 |
if (rc < 0) { |
| 1223 |
/* XXX: better error code ?*/
|
| 1224 |
goto fail;
|
| 1225 |
} |
| 1226 |
|
| 1227 |
break;
|
| 1228 |
case REQUEST_SENSE:
|
| 1229 |
abort(); |
| 1230 |
default:
|
| 1231 |
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
| 1232 |
scsi_check_condition(r, SENSE_CODE(INVALID_OPCODE)); |
| 1233 |
return 0; |
| 1234 |
fail:
|
| 1235 |
scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); |
| 1236 |
return 0; |
| 1237 |
illegal_lba:
|
| 1238 |
scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE)); |
| 1239 |
return 0; |
| 1240 |
} |
| 1241 |
if (r->sector_count == 0 && r->iov.iov_len == 0) { |
| 1242 |
scsi_req_complete(&r->req, GOOD); |
| 1243 |
} |
| 1244 |
len = r->sector_count * 512 + r->iov.iov_len;
|
| 1245 |
if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
|
| 1246 |
return -len;
|
| 1247 |
} else {
|
| 1248 |
if (!r->sector_count) {
|
| 1249 |
r->sector_count = -1;
|
| 1250 |
} |
| 1251 |
return len;
|
| 1252 |
} |
| 1253 |
} |
| 1254 |
|
| 1255 |
static void scsi_disk_reset(DeviceState *dev) |
| 1256 |
{
|
| 1257 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev); |
| 1258 |
uint64_t nb_sectors; |
| 1259 |
|
| 1260 |
scsi_device_purge_requests(&s->qdev, SENSE_CODE(RESET)); |
| 1261 |
|
| 1262 |
bdrv_get_geometry(s->bs, &nb_sectors); |
| 1263 |
nb_sectors /= s->cluster_size; |
| 1264 |
if (nb_sectors) {
|
| 1265 |
nb_sectors--; |
| 1266 |
} |
| 1267 |
s->max_lba = nb_sectors; |
| 1268 |
} |
| 1269 |
|
| 1270 |
static void scsi_destroy(SCSIDevice *dev) |
| 1271 |
{
|
| 1272 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
| 1273 |
|
| 1274 |
scsi_device_purge_requests(&s->qdev, SENSE_CODE(NO_SENSE)); |
| 1275 |
blockdev_mark_auto_del(s->qdev.conf.bs); |
| 1276 |
} |
| 1277 |
|
| 1278 |
static void scsi_cd_change_media_cb(void *opaque, bool load) |
| 1279 |
{
|
| 1280 |
SCSIDiskState *s = opaque; |
| 1281 |
|
| 1282 |
/*
|
| 1283 |
* When a CD gets changed, we have to report an ejected state and
|
| 1284 |
* then a loaded state to guests so that they detect tray
|
| 1285 |
* open/close and media change events. Guests that do not use
|
| 1286 |
* GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close
|
| 1287 |
* states rely on this behavior.
|
| 1288 |
*
|
| 1289 |
* media_changed governs the state machine used for unit attention
|
| 1290 |
* report. media_event is used by GET EVENT STATUS NOTIFICATION.
|
| 1291 |
*/
|
| 1292 |
s->media_changed = load; |
| 1293 |
s->tray_open = !load; |
| 1294 |
s->qdev.unit_attention = SENSE_CODE(UNIT_ATTENTION_NO_MEDIUM); |
| 1295 |
} |
| 1296 |
|
| 1297 |
static bool scsi_cd_is_tray_open(void *opaque) |
| 1298 |
{
|
| 1299 |
return ((SCSIDiskState *)opaque)->tray_open;
|
| 1300 |
} |
| 1301 |
|
| 1302 |
static bool scsi_cd_is_medium_locked(void *opaque) |
| 1303 |
{
|
| 1304 |
return ((SCSIDiskState *)opaque)->tray_locked;
|
| 1305 |
} |
| 1306 |
|
| 1307 |
static const BlockDevOps scsi_cd_block_ops = { |
| 1308 |
.change_media_cb = scsi_cd_change_media_cb, |
| 1309 |
.is_tray_open = scsi_cd_is_tray_open, |
| 1310 |
.is_medium_locked = scsi_cd_is_medium_locked, |
| 1311 |
}; |
| 1312 |
|
| 1313 |
static void scsi_disk_unit_attention_reported(SCSIDevice *dev) |
| 1314 |
{
|
| 1315 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
| 1316 |
if (s->media_changed) {
|
| 1317 |
s->media_changed = false;
|
| 1318 |
s->qdev.unit_attention = SENSE_CODE(MEDIUM_CHANGED); |
| 1319 |
} |
| 1320 |
} |
| 1321 |
|
| 1322 |
static int scsi_initfn(SCSIDevice *dev, uint8_t scsi_type) |
| 1323 |
{
|
| 1324 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
| 1325 |
DriveInfo *dinfo; |
| 1326 |
|
| 1327 |
if (!s->qdev.conf.bs) {
|
| 1328 |
error_report("scsi-disk: drive property not set");
|
| 1329 |
return -1; |
| 1330 |
} |
| 1331 |
s->bs = s->qdev.conf.bs; |
| 1332 |
|
| 1333 |
if (scsi_type == TYPE_DISK && !bdrv_is_inserted(s->bs)) {
|
| 1334 |
error_report("Device needs media, but drive is empty");
|
| 1335 |
return -1; |
| 1336 |
} |
| 1337 |
|
| 1338 |
if (!s->serial) {
|
| 1339 |
/* try to fall back to value set with legacy -drive serial=... */
|
| 1340 |
dinfo = drive_get_by_blockdev(s->bs); |
| 1341 |
if (*dinfo->serial) {
|
| 1342 |
s->serial = g_strdup(dinfo->serial); |
| 1343 |
} |
| 1344 |
} |
| 1345 |
|
| 1346 |
if (!s->version) {
|
| 1347 |
s->version = g_strdup(QEMU_VERSION); |
| 1348 |
} |
| 1349 |
|
| 1350 |
if (bdrv_is_sg(s->bs)) {
|
| 1351 |
error_report("scsi-disk: unwanted /dev/sg*");
|
| 1352 |
return -1; |
| 1353 |
} |
| 1354 |
|
| 1355 |
if (scsi_type == TYPE_ROM) {
|
| 1356 |
bdrv_set_dev_ops(s->bs, &scsi_cd_block_ops, s); |
| 1357 |
s->qdev.blocksize = 2048;
|
| 1358 |
} else if (scsi_type == TYPE_DISK) { |
| 1359 |
s->qdev.blocksize = s->qdev.conf.logical_block_size; |
| 1360 |
} else {
|
| 1361 |
error_report("scsi-disk: Unhandled SCSI type %02x", scsi_type);
|
| 1362 |
return -1; |
| 1363 |
} |
| 1364 |
s->cluster_size = s->qdev.blocksize / 512;
|
| 1365 |
bdrv_set_buffer_alignment(s->bs, s->qdev.blocksize); |
| 1366 |
|
| 1367 |
s->qdev.type = scsi_type; |
| 1368 |
qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s); |
| 1369 |
bdrv_iostatus_enable(s->bs); |
| 1370 |
add_boot_device_path(s->qdev.conf.bootindex, &dev->qdev, ",0");
|
| 1371 |
return 0; |
| 1372 |
} |
| 1373 |
|
| 1374 |
static int scsi_hd_initfn(SCSIDevice *dev) |
| 1375 |
{
|
| 1376 |
return scsi_initfn(dev, TYPE_DISK);
|
| 1377 |
} |
| 1378 |
|
| 1379 |
static int scsi_cd_initfn(SCSIDevice *dev) |
| 1380 |
{
|
| 1381 |
return scsi_initfn(dev, TYPE_ROM);
|
| 1382 |
} |
| 1383 |
|
| 1384 |
static int scsi_disk_initfn(SCSIDevice *dev) |
| 1385 |
{
|
| 1386 |
DriveInfo *dinfo; |
| 1387 |
uint8_t scsi_type; |
| 1388 |
|
| 1389 |
if (!dev->conf.bs) {
|
| 1390 |
scsi_type = TYPE_DISK; /* will die in scsi_initfn() */
|
| 1391 |
} else {
|
| 1392 |
dinfo = drive_get_by_blockdev(dev->conf.bs); |
| 1393 |
scsi_type = dinfo->media_cd ? TYPE_ROM : TYPE_DISK; |
| 1394 |
} |
| 1395 |
|
| 1396 |
return scsi_initfn(dev, scsi_type);
|
| 1397 |
} |
| 1398 |
|
| 1399 |
static SCSIReqOps scsi_disk_reqops = {
|
| 1400 |
.size = sizeof(SCSIDiskReq),
|
| 1401 |
.free_req = scsi_free_request, |
| 1402 |
.send_command = scsi_send_command, |
| 1403 |
.read_data = scsi_read_data, |
| 1404 |
.write_data = scsi_write_data, |
| 1405 |
.cancel_io = scsi_cancel_io, |
| 1406 |
.get_buf = scsi_get_buf, |
| 1407 |
}; |
| 1408 |
|
| 1409 |
static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag,
|
| 1410 |
uint32_t lun, void *hba_private)
|
| 1411 |
{
|
| 1412 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
| 1413 |
SCSIRequest *req; |
| 1414 |
|
| 1415 |
req = scsi_req_alloc(&scsi_disk_reqops, &s->qdev, tag, lun, hba_private); |
| 1416 |
return req;
|
| 1417 |
} |
| 1418 |
|
| 1419 |
#define DEFINE_SCSI_DISK_PROPERTIES() \
|
| 1420 |
DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf), \ |
| 1421 |
DEFINE_PROP_STRING("ver", SCSIDiskState, version), \
|
| 1422 |
DEFINE_PROP_STRING("serial", SCSIDiskState, serial)
|
| 1423 |
|
| 1424 |
static SCSIDeviceInfo scsi_disk_info[] = {
|
| 1425 |
{
|
| 1426 |
.qdev.name = "scsi-hd",
|
| 1427 |
.qdev.fw_name = "disk",
|
| 1428 |
.qdev.desc = "virtual SCSI disk",
|
| 1429 |
.qdev.size = sizeof(SCSIDiskState),
|
| 1430 |
.qdev.reset = scsi_disk_reset, |
| 1431 |
.init = scsi_hd_initfn, |
| 1432 |
.destroy = scsi_destroy, |
| 1433 |
.alloc_req = scsi_new_request, |
| 1434 |
.unit_attention_reported = scsi_disk_unit_attention_reported, |
| 1435 |
.qdev.props = (Property[]) {
|
| 1436 |
DEFINE_SCSI_DISK_PROPERTIES(), |
| 1437 |
DEFINE_PROP_BIT("removable", SCSIDiskState, removable, 0, false), |
| 1438 |
DEFINE_PROP_END_OF_LIST(), |
| 1439 |
} |
| 1440 |
},{
|
| 1441 |
.qdev.name = "scsi-cd",
|
| 1442 |
.qdev.fw_name = "disk",
|
| 1443 |
.qdev.desc = "virtual SCSI CD-ROM",
|
| 1444 |
.qdev.size = sizeof(SCSIDiskState),
|
| 1445 |
.qdev.reset = scsi_disk_reset, |
| 1446 |
.init = scsi_cd_initfn, |
| 1447 |
.destroy = scsi_destroy, |
| 1448 |
.alloc_req = scsi_new_request, |
| 1449 |
.unit_attention_reported = scsi_disk_unit_attention_reported, |
| 1450 |
.qdev.props = (Property[]) {
|
| 1451 |
DEFINE_SCSI_DISK_PROPERTIES(), |
| 1452 |
DEFINE_PROP_END_OF_LIST(), |
| 1453 |
}, |
| 1454 |
},{
|
| 1455 |
.qdev.name = "scsi-disk", /* legacy -device scsi-disk */ |
| 1456 |
.qdev.fw_name = "disk",
|
| 1457 |
.qdev.desc = "virtual SCSI disk or CD-ROM (legacy)",
|
| 1458 |
.qdev.size = sizeof(SCSIDiskState),
|
| 1459 |
.qdev.reset = scsi_disk_reset, |
| 1460 |
.init = scsi_disk_initfn, |
| 1461 |
.destroy = scsi_destroy, |
| 1462 |
.alloc_req = scsi_new_request, |
| 1463 |
.unit_attention_reported = scsi_disk_unit_attention_reported, |
| 1464 |
.qdev.props = (Property[]) {
|
| 1465 |
DEFINE_SCSI_DISK_PROPERTIES(), |
| 1466 |
DEFINE_PROP_BIT("removable", SCSIDiskState, removable, 0, false), |
| 1467 |
DEFINE_PROP_END_OF_LIST(), |
| 1468 |
} |
| 1469 |
} |
| 1470 |
}; |
| 1471 |
|
| 1472 |
static void scsi_disk_register_devices(void) |
| 1473 |
{
|
| 1474 |
int i;
|
| 1475 |
|
| 1476 |
for (i = 0; i < ARRAY_SIZE(scsi_disk_info); i++) { |
| 1477 |
scsi_qdev_register(&scsi_disk_info[i]); |
| 1478 |
} |
| 1479 |
} |
| 1480 |
device_init(scsi_disk_register_devices) |