root / hw / scsi-disk.c @ f01b5931
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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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#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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/* 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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/* 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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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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} |
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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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/* 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_write_complete(r, -EINVAL); |
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return;
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} |
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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); |
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} |
302 |
bdrv_acct_start(s->bs, &r->acct, n * BDRV_SECTOR_SIZE, BDRV_ACCT_WRITE); |
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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) { |
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scsi_write_complete(r, -ENOMEM); |
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} |
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} 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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} |
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} |
313 |
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static void scsi_dma_restart_bh(void *opaque) |
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{ |
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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); |
321 |
s->bh = NULL;
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QTAILQ_FOREACH(req, &s->qdev.requests, next) { |
324 |
r = DO_UPCAST(SCSIDiskReq, req, req); |
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if (r->status & SCSI_REQ_STATUS_RETRY) {
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int status = r->status;
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int ret;
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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); |
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break;
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case SCSI_REQ_STATUS_RETRY_FLUSH:
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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 |
{ |
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SCSIDiskState *s = opaque; |
352 |
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353 |
if (!running) {
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return;
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} |
356 |
if (!s->bh) {
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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. */
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363 |
static uint8_t *scsi_get_buf(SCSIRequest *req)
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364 |
{ |
365 |
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
366 |
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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 */
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377 |
BADF("optional INQUIRY command support request not implemented\n");
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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 "
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386 |
"less than 4\n", page_code, req->cmd.xfer);
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387 |
return -1; |
388 |
} |
389 |
|
390 |
if (s->qdev.type == TYPE_ROM) {
|
391 |
outbuf[buflen++] = 5;
|
392 |
} else {
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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 mode_sense_page(SCSIDiskState *s, int page, uint8_t **p_outbuf, |
571 |
int page_control)
|
572 |
{ |
573 |
BlockDriverState *bdrv = s->bs; |
574 |
int cylinders, heads, secs;
|
575 |
uint8_t *p = *p_outbuf; |
576 |
|
577 |
/*
|
578 |
* If Changeable Values are requested, a mask denoting those mode parameters
|
579 |
* that are changeable shall be returned. As we currently don't support
|
580 |
* parameter changes via MODE_SELECT all bits are returned set to zero.
|
581 |
* The buffer was already menset to zero by the caller of this function.
|
582 |
*/
|
583 |
switch (page) {
|
584 |
case MODE_PAGE_HD_GEOMETRY:
|
585 |
if (s->qdev.type == TYPE_ROM) {
|
586 |
return -1; |
587 |
} |
588 |
p[0] = 4; |
589 |
p[1] = 0x16; |
590 |
if (page_control == 1) { /* Changeable Values */ |
591 |
break;
|
592 |
} |
593 |
/* if a geometry hint is available, use it */
|
594 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
595 |
p[2] = (cylinders >> 16) & 0xff; |
596 |
p[3] = (cylinders >> 8) & 0xff; |
597 |
p[4] = cylinders & 0xff; |
598 |
p[5] = heads & 0xff; |
599 |
/* Write precomp start cylinder, disabled */
|
600 |
p[6] = (cylinders >> 16) & 0xff; |
601 |
p[7] = (cylinders >> 8) & 0xff; |
602 |
p[8] = cylinders & 0xff; |
603 |
/* Reduced current start cylinder, disabled */
|
604 |
p[9] = (cylinders >> 16) & 0xff; |
605 |
p[10] = (cylinders >> 8) & 0xff; |
606 |
p[11] = cylinders & 0xff; |
607 |
/* Device step rate [ns], 200ns */
|
608 |
p[12] = 0; |
609 |
p[13] = 200; |
610 |
/* Landing zone cylinder */
|
611 |
p[14] = 0xff; |
612 |
p[15] = 0xff; |
613 |
p[16] = 0xff; |
614 |
/* Medium rotation rate [rpm], 5400 rpm */
|
615 |
p[20] = (5400 >> 8) & 0xff; |
616 |
p[21] = 5400 & 0xff; |
617 |
break;
|
618 |
|
619 |
case MODE_PAGE_FLEXIBLE_DISK_GEOMETRY:
|
620 |
if (s->qdev.type == TYPE_ROM) {
|
621 |
return -1; |
622 |
} |
623 |
p[0] = 5; |
624 |
p[1] = 0x1e; |
625 |
if (page_control == 1) { /* Changeable Values */ |
626 |
break;
|
627 |
} |
628 |
/* Transfer rate [kbit/s], 5Mbit/s */
|
629 |
p[2] = 5000 >> 8; |
630 |
p[3] = 5000 & 0xff; |
631 |
/* if a geometry hint is available, use it */
|
632 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
633 |
p[4] = heads & 0xff; |
634 |
p[5] = secs & 0xff; |
635 |
p[6] = s->cluster_size * 2; |
636 |
p[8] = (cylinders >> 8) & 0xff; |
637 |
p[9] = cylinders & 0xff; |
638 |
/* Write precomp start cylinder, disabled */
|
639 |
p[10] = (cylinders >> 8) & 0xff; |
640 |
p[11] = cylinders & 0xff; |
641 |
/* Reduced current start cylinder, disabled */
|
642 |
p[12] = (cylinders >> 8) & 0xff; |
643 |
p[13] = cylinders & 0xff; |
644 |
/* Device step rate [100us], 100us */
|
645 |
p[14] = 0; |
646 |
p[15] = 1; |
647 |
/* Device step pulse width [us], 1us */
|
648 |
p[16] = 1; |
649 |
/* Device head settle delay [100us], 100us */
|
650 |
p[17] = 0; |
651 |
p[18] = 1; |
652 |
/* Motor on delay [0.1s], 0.1s */
|
653 |
p[19] = 1; |
654 |
/* Motor off delay [0.1s], 0.1s */
|
655 |
p[20] = 1; |
656 |
/* Medium rotation rate [rpm], 5400 rpm */
|
657 |
p[28] = (5400 >> 8) & 0xff; |
658 |
p[29] = 5400 & 0xff; |
659 |
break;
|
660 |
|
661 |
case MODE_PAGE_CACHING:
|
662 |
p[0] = 8; |
663 |
p[1] = 0x12; |
664 |
if (page_control == 1) { /* Changeable Values */ |
665 |
break;
|
666 |
} |
667 |
if (bdrv_enable_write_cache(s->bs)) {
|
668 |
p[2] = 4; /* WCE */ |
669 |
} |
670 |
break;
|
671 |
|
672 |
case MODE_PAGE_CAPABILITIES:
|
673 |
if (s->qdev.type != TYPE_ROM) {
|
674 |
return -1; |
675 |
} |
676 |
p[0] = 0x2a; |
677 |
p[1] = 0x14; |
678 |
if (page_control == 1) { /* Changeable Values */ |
679 |
break;
|
680 |
} |
681 |
p[2] = 3; // CD-R & CD-RW read |
682 |
p[3] = 0; // Writing not supported |
683 |
p[4] = 0x7f; /* Audio, composite, digital out, |
684 |
mode 2 form 1&2, multi session */
|
685 |
p[5] = 0xff; /* CD DA, DA accurate, RW supported, |
686 |
RW corrected, C2 errors, ISRC,
|
687 |
UPC, Bar code */
|
688 |
p[6] = 0x2d | (s->tray_locked ? 2 : 0); |
689 |
/* Locking supported, jumper present, eject, tray */
|
690 |
p[7] = 0; /* no volume & mute control, no |
691 |
changer */
|
692 |
p[8] = (50 * 176) >> 8; // 50x read speed |
693 |
p[9] = (50 * 176) & 0xff; |
694 |
p[10] = 0 >> 8; // No volume |
695 |
p[11] = 0 & 0xff; |
696 |
p[12] = 2048 >> 8; // 2M buffer |
697 |
p[13] = 2048 & 0xff; |
698 |
p[14] = (16 * 176) >> 8; // 16x read speed current |
699 |
p[15] = (16 * 176) & 0xff; |
700 |
p[18] = (16 * 176) >> 8; // 16x write speed |
701 |
p[19] = (16 * 176) & 0xff; |
702 |
p[20] = (16 * 176) >> 8; // 16x write speed current |
703 |
p[21] = (16 * 176) & 0xff; |
704 |
break;
|
705 |
|
706 |
default:
|
707 |
return -1; |
708 |
} |
709 |
|
710 |
*p_outbuf += p[1] + 2; |
711 |
return p[1] + 2; |
712 |
} |
713 |
|
714 |
static int scsi_disk_emulate_mode_sense(SCSIDiskReq *r, uint8_t *outbuf) |
715 |
{ |
716 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
717 |
uint64_t nb_sectors; |
718 |
int page, dbd, buflen, ret, page_control;
|
719 |
uint8_t *p; |
720 |
uint8_t dev_specific_param; |
721 |
|
722 |
dbd = r->req.cmd.buf[1] & 0x8; |
723 |
page = r->req.cmd.buf[2] & 0x3f; |
724 |
page_control = (r->req.cmd.buf[2] & 0xc0) >> 6; |
725 |
DPRINTF("Mode Sense(%d) (page %d, xfer %zd, page_control %d)\n",
|
726 |
(r->req.cmd.buf[0] == MODE_SENSE) ? 6 : 10, page, r->req.cmd.xfer, page_control); |
727 |
memset(outbuf, 0, r->req.cmd.xfer);
|
728 |
p = outbuf; |
729 |
|
730 |
if (bdrv_is_read_only(s->bs)) {
|
731 |
dev_specific_param = 0x80; /* Readonly. */ |
732 |
} else {
|
733 |
dev_specific_param = 0x00;
|
734 |
} |
735 |
|
736 |
if (r->req.cmd.buf[0] == MODE_SENSE) { |
737 |
p[1] = 0; /* Default media type. */ |
738 |
p[2] = dev_specific_param;
|
739 |
p[3] = 0; /* Block descriptor length. */ |
740 |
p += 4;
|
741 |
} else { /* MODE_SENSE_10 */ |
742 |
p[2] = 0; /* Default media type. */ |
743 |
p[3] = dev_specific_param;
|
744 |
p[6] = p[7] = 0; /* Block descriptor length. */ |
745 |
p += 8;
|
746 |
} |
747 |
|
748 |
bdrv_get_geometry(s->bs, &nb_sectors); |
749 |
if (!dbd && nb_sectors) {
|
750 |
if (r->req.cmd.buf[0] == MODE_SENSE) { |
751 |
outbuf[3] = 8; /* Block descriptor length */ |
752 |
} else { /* MODE_SENSE_10 */ |
753 |
outbuf[7] = 8; /* Block descriptor length */ |
754 |
} |
755 |
nb_sectors /= s->cluster_size; |
756 |
if (nb_sectors > 0xffffff) { |
757 |
nb_sectors = 0;
|
758 |
} |
759 |
p[0] = 0; /* media density code */ |
760 |
p[1] = (nb_sectors >> 16) & 0xff; |
761 |
p[2] = (nb_sectors >> 8) & 0xff; |
762 |
p[3] = nb_sectors & 0xff; |
763 |
p[4] = 0; /* reserved */ |
764 |
p[5] = 0; /* bytes 5-7 are the sector size in bytes */ |
765 |
p[6] = s->cluster_size * 2; |
766 |
p[7] = 0; |
767 |
p += 8;
|
768 |
} |
769 |
|
770 |
if (page_control == 3) { |
771 |
/* Saved Values */
|
772 |
scsi_check_condition(r, SENSE_CODE(SAVING_PARAMS_NOT_SUPPORTED)); |
773 |
return -1; |
774 |
} |
775 |
|
776 |
if (page == 0x3f) { |
777 |
for (page = 0; page <= 0x3e; page++) { |
778 |
mode_sense_page(s, page, &p, page_control); |
779 |
} |
780 |
} else {
|
781 |
ret = mode_sense_page(s, page, &p, page_control); |
782 |
if (ret == -1) { |
783 |
return -1; |
784 |
} |
785 |
} |
786 |
|
787 |
buflen = p - outbuf; |
788 |
/*
|
789 |
* The mode data length field specifies the length in bytes of the
|
790 |
* following data that is available to be transferred. The mode data
|
791 |
* length does not include itself.
|
792 |
*/
|
793 |
if (r->req.cmd.buf[0] == MODE_SENSE) { |
794 |
outbuf[0] = buflen - 1; |
795 |
} else { /* MODE_SENSE_10 */ |
796 |
outbuf[0] = ((buflen - 2) >> 8) & 0xff; |
797 |
outbuf[1] = (buflen - 2) & 0xff; |
798 |
} |
799 |
if (buflen > r->req.cmd.xfer) {
|
800 |
buflen = r->req.cmd.xfer; |
801 |
} |
802 |
return buflen;
|
803 |
} |
804 |
|
805 |
static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf) |
806 |
{ |
807 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
808 |
int start_track, format, msf, toclen;
|
809 |
uint64_t nb_sectors; |
810 |
|
811 |
msf = req->cmd.buf[1] & 2; |
812 |
format = req->cmd.buf[2] & 0xf; |
813 |
start_track = req->cmd.buf[6];
|
814 |
bdrv_get_geometry(s->bs, &nb_sectors); |
815 |
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
816 |
nb_sectors /= s->cluster_size; |
817 |
switch (format) {
|
818 |
case 0: |
819 |
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); |
820 |
break;
|
821 |
case 1: |
822 |
/* multi session : only a single session defined */
|
823 |
toclen = 12;
|
824 |
memset(outbuf, 0, 12); |
825 |
outbuf[1] = 0x0a; |
826 |
outbuf[2] = 0x01; |
827 |
outbuf[3] = 0x01; |
828 |
break;
|
829 |
case 2: |
830 |
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); |
831 |
break;
|
832 |
default:
|
833 |
return -1; |
834 |
} |
835 |
if (toclen > req->cmd.xfer) {
|
836 |
toclen = req->cmd.xfer; |
837 |
} |
838 |
return toclen;
|
839 |
} |
840 |
|
841 |
static int scsi_disk_emulate_start_stop(SCSIDiskReq *r) |
842 |
{ |
843 |
SCSIRequest *req = &r->req; |
844 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
845 |
bool start = req->cmd.buf[4] & 1; |
846 |
bool loej = req->cmd.buf[4] & 2; /* load on start, eject on !start */ |
847 |
|
848 |
if (s->qdev.type == TYPE_ROM && loej) {
|
849 |
if (!start && !s->tray_open && s->tray_locked) {
|
850 |
scsi_check_condition(r, |
851 |
bdrv_is_inserted(s->bs) |
852 |
? SENSE_CODE(ILLEGAL_REQ_REMOVAL_PREVENTED) |
853 |
: SENSE_CODE(NOT_READY_REMOVAL_PREVENTED)); |
854 |
return -1; |
855 |
} |
856 |
bdrv_eject(s->bs, !start); |
857 |
s->tray_open = !start; |
858 |
} |
859 |
return 0; |
860 |
} |
861 |
|
862 |
static int scsi_disk_emulate_command(SCSIDiskReq *r) |
863 |
{ |
864 |
SCSIRequest *req = &r->req; |
865 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
866 |
uint64_t nb_sectors; |
867 |
uint8_t *outbuf; |
868 |
int buflen = 0; |
869 |
|
870 |
if (!r->iov.iov_base) {
|
871 |
/*
|
872 |
* FIXME: we shouldn't return anything bigger than 4k, but the code
|
873 |
* requires the buffer to be as big as req->cmd.xfer in several
|
874 |
* places. So, do not allow CDBs with a very large ALLOCATION
|
875 |
* LENGTH. The real fix would be to modify scsi_read_data and
|
876 |
* dma_buf_read, so that they return data beyond the buflen
|
877 |
* as all zeros.
|
878 |
*/
|
879 |
if (req->cmd.xfer > 65536) { |
880 |
goto illegal_request;
|
881 |
} |
882 |
r->buflen = MAX(4096, req->cmd.xfer);
|
883 |
r->iov.iov_base = qemu_blockalign(s->bs, r->buflen); |
884 |
} |
885 |
|
886 |
outbuf = r->iov.iov_base; |
887 |
switch (req->cmd.buf[0]) { |
888 |
case TEST_UNIT_READY:
|
889 |
if (s->tray_open || !bdrv_is_inserted(s->bs)) {
|
890 |
goto not_ready;
|
891 |
} |
892 |
break;
|
893 |
case INQUIRY:
|
894 |
buflen = scsi_disk_emulate_inquiry(req, outbuf); |
895 |
if (buflen < 0) { |
896 |
goto illegal_request;
|
897 |
} |
898 |
break;
|
899 |
case MODE_SENSE:
|
900 |
case MODE_SENSE_10:
|
901 |
buflen = scsi_disk_emulate_mode_sense(r, outbuf); |
902 |
if (buflen < 0) { |
903 |
goto illegal_request;
|
904 |
} |
905 |
break;
|
906 |
case READ_TOC:
|
907 |
buflen = scsi_disk_emulate_read_toc(req, outbuf); |
908 |
if (buflen < 0) { |
909 |
goto illegal_request;
|
910 |
} |
911 |
break;
|
912 |
case RESERVE:
|
913 |
if (req->cmd.buf[1] & 1) { |
914 |
goto illegal_request;
|
915 |
} |
916 |
break;
|
917 |
case RESERVE_10:
|
918 |
if (req->cmd.buf[1] & 3) { |
919 |
goto illegal_request;
|
920 |
} |
921 |
break;
|
922 |
case RELEASE:
|
923 |
if (req->cmd.buf[1] & 1) { |
924 |
goto illegal_request;
|
925 |
} |
926 |
break;
|
927 |
case RELEASE_10:
|
928 |
if (req->cmd.buf[1] & 3) { |
929 |
goto illegal_request;
|
930 |
} |
931 |
break;
|
932 |
case START_STOP:
|
933 |
if (scsi_disk_emulate_start_stop(r) < 0) { |
934 |
return -1; |
935 |
} |
936 |
break;
|
937 |
case ALLOW_MEDIUM_REMOVAL:
|
938 |
s->tray_locked = req->cmd.buf[4] & 1; |
939 |
bdrv_lock_medium(s->bs, req->cmd.buf[4] & 1); |
940 |
break;
|
941 |
case READ_CAPACITY_10:
|
942 |
/* The normal LEN field for this command is zero. */
|
943 |
memset(outbuf, 0, 8); |
944 |
bdrv_get_geometry(s->bs, &nb_sectors); |
945 |
if (!nb_sectors) {
|
946 |
goto not_ready;
|
947 |
} |
948 |
nb_sectors /= s->cluster_size; |
949 |
/* Returned value is the address of the last sector. */
|
950 |
nb_sectors--; |
951 |
/* Remember the new size for read/write sanity checking. */
|
952 |
s->max_lba = nb_sectors; |
953 |
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
|
954 |
if (nb_sectors > UINT32_MAX) {
|
955 |
nb_sectors = UINT32_MAX; |
956 |
} |
957 |
outbuf[0] = (nb_sectors >> 24) & 0xff; |
958 |
outbuf[1] = (nb_sectors >> 16) & 0xff; |
959 |
outbuf[2] = (nb_sectors >> 8) & 0xff; |
960 |
outbuf[3] = nb_sectors & 0xff; |
961 |
outbuf[4] = 0; |
962 |
outbuf[5] = 0; |
963 |
outbuf[6] = s->cluster_size * 2; |
964 |
outbuf[7] = 0; |
965 |
buflen = 8;
|
966 |
break;
|
967 |
case GET_CONFIGURATION:
|
968 |
memset(outbuf, 0, 8); |
969 |
/* ??? This should probably return much more information. For now
|
970 |
just return the basic header indicating the CD-ROM profile. */
|
971 |
outbuf[7] = 8; // CD-ROM |
972 |
buflen = 8;
|
973 |
break;
|
974 |
case SERVICE_ACTION_IN_16:
|
975 |
/* Service Action In subcommands. */
|
976 |
if ((req->cmd.buf[1] & 31) == SAI_READ_CAPACITY_16) { |
977 |
DPRINTF("SAI READ CAPACITY(16)\n");
|
978 |
memset(outbuf, 0, req->cmd.xfer);
|
979 |
bdrv_get_geometry(s->bs, &nb_sectors); |
980 |
if (!nb_sectors) {
|
981 |
goto not_ready;
|
982 |
} |
983 |
nb_sectors /= s->cluster_size; |
984 |
/* Returned value is the address of the last sector. */
|
985 |
nb_sectors--; |
986 |
/* Remember the new size for read/write sanity checking. */
|
987 |
s->max_lba = nb_sectors; |
988 |
outbuf[0] = (nb_sectors >> 56) & 0xff; |
989 |
outbuf[1] = (nb_sectors >> 48) & 0xff; |
990 |
outbuf[2] = (nb_sectors >> 40) & 0xff; |
991 |
outbuf[3] = (nb_sectors >> 32) & 0xff; |
992 |
outbuf[4] = (nb_sectors >> 24) & 0xff; |
993 |
outbuf[5] = (nb_sectors >> 16) & 0xff; |
994 |
outbuf[6] = (nb_sectors >> 8) & 0xff; |
995 |
outbuf[7] = nb_sectors & 0xff; |
996 |
outbuf[8] = 0; |
997 |
outbuf[9] = 0; |
998 |
outbuf[10] = s->cluster_size * 2; |
999 |
outbuf[11] = 0; |
1000 |
outbuf[12] = 0; |
1001 |
outbuf[13] = get_physical_block_exp(&s->qdev.conf);
|
1002 |
|
1003 |
/* set TPE bit if the format supports discard */
|
1004 |
if (s->qdev.conf.discard_granularity) {
|
1005 |
outbuf[14] = 0x80; |
1006 |
} |
1007 |
|
1008 |
/* Protection, exponent and lowest lba field left blank. */
|
1009 |
buflen = req->cmd.xfer; |
1010 |
break;
|
1011 |
} |
1012 |
DPRINTF("Unsupported Service Action In\n");
|
1013 |
goto illegal_request;
|
1014 |
case VERIFY_10:
|
1015 |
break;
|
1016 |
default:
|
1017 |
scsi_check_condition(r, SENSE_CODE(INVALID_OPCODE)); |
1018 |
return -1; |
1019 |
} |
1020 |
return buflen;
|
1021 |
|
1022 |
not_ready:
|
1023 |
if (s->tray_open || !bdrv_is_inserted(s->bs)) {
|
1024 |
scsi_check_condition(r, SENSE_CODE(NO_MEDIUM)); |
1025 |
} else {
|
1026 |
scsi_check_condition(r, SENSE_CODE(LUN_NOT_READY)); |
1027 |
} |
1028 |
return -1; |
1029 |
|
1030 |
illegal_request:
|
1031 |
if (r->req.status == -1) { |
1032 |
scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); |
1033 |
} |
1034 |
return -1; |
1035 |
} |
1036 |
|
1037 |
/* Execute a scsi command. Returns the length of the data expected by the
|
1038 |
command. This will be Positive for data transfers from the device
|
1039 |
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
1040 |
and zero if the command does not transfer any data. */
|
1041 |
|
1042 |
static int32_t scsi_send_command(SCSIRequest *req, uint8_t *buf)
|
1043 |
{ |
1044 |
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
1045 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
1046 |
int32_t len; |
1047 |
uint8_t command; |
1048 |
int rc;
|
1049 |
|
1050 |
command = buf[0];
|
1051 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", req->lun, req->tag, buf[0]); |
1052 |
|
1053 |
#ifdef DEBUG_SCSI
|
1054 |
{ |
1055 |
int i;
|
1056 |
for (i = 1; i < r->req.cmd.len; i++) { |
1057 |
printf(" 0x%02x", buf[i]);
|
1058 |
} |
1059 |
printf("\n");
|
1060 |
} |
1061 |
#endif
|
1062 |
|
1063 |
switch (command) {
|
1064 |
case TEST_UNIT_READY:
|
1065 |
case INQUIRY:
|
1066 |
case MODE_SENSE:
|
1067 |
case MODE_SENSE_10:
|
1068 |
case RESERVE:
|
1069 |
case RESERVE_10:
|
1070 |
case RELEASE:
|
1071 |
case RELEASE_10:
|
1072 |
case START_STOP:
|
1073 |
case ALLOW_MEDIUM_REMOVAL:
|
1074 |
case READ_CAPACITY_10:
|
1075 |
case READ_TOC:
|
1076 |
case GET_CONFIGURATION:
|
1077 |
case SERVICE_ACTION_IN_16:
|
1078 |
case VERIFY_10:
|
1079 |
rc = scsi_disk_emulate_command(r); |
1080 |
if (rc < 0) { |
1081 |
return 0; |
1082 |
} |
1083 |
|
1084 |
r->iov.iov_len = rc; |
1085 |
break;
|
1086 |
case SYNCHRONIZE_CACHE:
|
1087 |
bdrv_acct_start(s->bs, &r->acct, 0, BDRV_ACCT_FLUSH);
|
1088 |
r->req.aiocb = bdrv_aio_flush(s->bs, scsi_flush_complete, r); |
1089 |
if (r->req.aiocb == NULL) { |
1090 |
scsi_flush_complete(r, -EIO); |
1091 |
} |
1092 |
return 0; |
1093 |
case READ_6:
|
1094 |
case READ_10:
|
1095 |
case READ_12:
|
1096 |
case READ_16:
|
1097 |
len = r->req.cmd.xfer / s->qdev.blocksize; |
1098 |
DPRINTF("Read (sector %" PRId64 ", count %d)\n", r->req.cmd.lba, len); |
1099 |
if (r->req.cmd.lba > s->max_lba) {
|
1100 |
goto illegal_lba;
|
1101 |
} |
1102 |
r->sector = r->req.cmd.lba * s->cluster_size; |
1103 |
r->sector_count = len * s->cluster_size; |
1104 |
break;
|
1105 |
case WRITE_6:
|
1106 |
case WRITE_10:
|
1107 |
case WRITE_12:
|
1108 |
case WRITE_16:
|
1109 |
case WRITE_VERIFY_10:
|
1110 |
case WRITE_VERIFY_12:
|
1111 |
case WRITE_VERIFY_16:
|
1112 |
len = r->req.cmd.xfer / s->qdev.blocksize; |
1113 |
DPRINTF("Write %s(sector %" PRId64 ", count %d)\n", |
1114 |
(command & 0xe) == 0xe ? "And Verify " : "", |
1115 |
r->req.cmd.lba, len); |
1116 |
if (r->req.cmd.lba > s->max_lba) {
|
1117 |
goto illegal_lba;
|
1118 |
} |
1119 |
r->sector = r->req.cmd.lba * s->cluster_size; |
1120 |
r->sector_count = len * s->cluster_size; |
1121 |
break;
|
1122 |
case MODE_SELECT:
|
1123 |
DPRINTF("Mode Select(6) (len %lu)\n", (long)r->req.cmd.xfer); |
1124 |
/* We don't support mode parameter changes.
|
1125 |
Allow the mode parameter header + block descriptors only. */
|
1126 |
if (r->req.cmd.xfer > 12) { |
1127 |
goto fail;
|
1128 |
} |
1129 |
break;
|
1130 |
case MODE_SELECT_10:
|
1131 |
DPRINTF("Mode Select(10) (len %lu)\n", (long)r->req.cmd.xfer); |
1132 |
/* We don't support mode parameter changes.
|
1133 |
Allow the mode parameter header + block descriptors only. */
|
1134 |
if (r->req.cmd.xfer > 16) { |
1135 |
goto fail;
|
1136 |
} |
1137 |
break;
|
1138 |
case SEEK_6:
|
1139 |
case SEEK_10:
|
1140 |
DPRINTF("Seek(%d) (sector %" PRId64 ")\n", command == SEEK_6 ? 6 : 10, |
1141 |
r->req.cmd.lba); |
1142 |
if (r->req.cmd.lba > s->max_lba) {
|
1143 |
goto illegal_lba;
|
1144 |
} |
1145 |
break;
|
1146 |
case WRITE_SAME_16:
|
1147 |
len = r->req.cmd.xfer / s->qdev.blocksize; |
1148 |
|
1149 |
DPRINTF("WRITE SAME(16) (sector %" PRId64 ", count %d)\n", |
1150 |
r->req.cmd.lba, len); |
1151 |
|
1152 |
if (r->req.cmd.lba > s->max_lba) {
|
1153 |
goto illegal_lba;
|
1154 |
} |
1155 |
|
1156 |
/*
|
1157 |
* We only support WRITE SAME with the unmap bit set for now.
|
1158 |
*/
|
1159 |
if (!(buf[1] & 0x8)) { |
1160 |
goto fail;
|
1161 |
} |
1162 |
|
1163 |
rc = bdrv_discard(s->bs, r->req.cmd.lba * s->cluster_size, |
1164 |
len * s->cluster_size); |
1165 |
if (rc < 0) { |
1166 |
/* XXX: better error code ?*/
|
1167 |
goto fail;
|
1168 |
} |
1169 |
|
1170 |
break;
|
1171 |
case REQUEST_SENSE:
|
1172 |
abort(); |
1173 |
default:
|
1174 |
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
1175 |
scsi_check_condition(r, SENSE_CODE(INVALID_OPCODE)); |
1176 |
return 0; |
1177 |
fail:
|
1178 |
scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); |
1179 |
return 0; |
1180 |
illegal_lba:
|
1181 |
scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE)); |
1182 |
return 0; |
1183 |
} |
1184 |
if (r->sector_count == 0 && r->iov.iov_len == 0) { |
1185 |
scsi_req_complete(&r->req, GOOD); |
1186 |
} |
1187 |
len = r->sector_count * 512 + r->iov.iov_len;
|
1188 |
if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
|
1189 |
return -len;
|
1190 |
} else {
|
1191 |
if (!r->sector_count) {
|
1192 |
r->sector_count = -1;
|
1193 |
} |
1194 |
return len;
|
1195 |
} |
1196 |
} |
1197 |
|
1198 |
static void scsi_disk_reset(DeviceState *dev) |
1199 |
{ |
1200 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev); |
1201 |
uint64_t nb_sectors; |
1202 |
|
1203 |
scsi_device_purge_requests(&s->qdev, SENSE_CODE(RESET)); |
1204 |
|
1205 |
bdrv_get_geometry(s->bs, &nb_sectors); |
1206 |
nb_sectors /= s->cluster_size; |
1207 |
if (nb_sectors) {
|
1208 |
nb_sectors--; |
1209 |
} |
1210 |
s->max_lba = nb_sectors; |
1211 |
} |
1212 |
|
1213 |
static void scsi_destroy(SCSIDevice *dev) |
1214 |
{ |
1215 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
1216 |
|
1217 |
scsi_device_purge_requests(&s->qdev, SENSE_CODE(NO_SENSE)); |
1218 |
blockdev_mark_auto_del(s->qdev.conf.bs); |
1219 |
} |
1220 |
|
1221 |
static void scsi_cd_change_media_cb(void *opaque, bool load) |
1222 |
{ |
1223 |
SCSIDiskState *s = opaque; |
1224 |
|
1225 |
/*
|
1226 |
* When a CD gets changed, we have to report an ejected state and
|
1227 |
* then a loaded state to guests so that they detect tray
|
1228 |
* open/close and media change events. Guests that do not use
|
1229 |
* GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close
|
1230 |
* states rely on this behavior.
|
1231 |
*
|
1232 |
* media_changed governs the state machine used for unit attention
|
1233 |
* report. media_event is used by GET EVENT STATUS NOTIFICATION.
|
1234 |
*/
|
1235 |
s->media_changed = load; |
1236 |
s->tray_open = !load; |
1237 |
s->qdev.unit_attention = SENSE_CODE(UNIT_ATTENTION_NO_MEDIUM); |
1238 |
} |
1239 |
|
1240 |
static bool scsi_cd_is_tray_open(void *opaque) |
1241 |
{ |
1242 |
return ((SCSIDiskState *)opaque)->tray_open;
|
1243 |
} |
1244 |
|
1245 |
static bool scsi_cd_is_medium_locked(void *opaque) |
1246 |
{ |
1247 |
return ((SCSIDiskState *)opaque)->tray_locked;
|
1248 |
} |
1249 |
|
1250 |
static const BlockDevOps scsi_cd_block_ops = { |
1251 |
.change_media_cb = scsi_cd_change_media_cb, |
1252 |
.is_tray_open = scsi_cd_is_tray_open, |
1253 |
.is_medium_locked = scsi_cd_is_medium_locked, |
1254 |
}; |
1255 |
|
1256 |
static void scsi_disk_unit_attention_reported(SCSIDevice *dev) |
1257 |
{ |
1258 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
1259 |
if (s->media_changed) {
|
1260 |
s->media_changed = false;
|
1261 |
s->qdev.unit_attention = SENSE_CODE(MEDIUM_CHANGED); |
1262 |
} |
1263 |
} |
1264 |
|
1265 |
static int scsi_initfn(SCSIDevice *dev, uint8_t scsi_type) |
1266 |
{ |
1267 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
1268 |
DriveInfo *dinfo; |
1269 |
|
1270 |
if (!s->qdev.conf.bs) {
|
1271 |
error_report("scsi-disk: drive property not set");
|
1272 |
return -1; |
1273 |
} |
1274 |
s->bs = s->qdev.conf.bs; |
1275 |
|
1276 |
if (scsi_type == TYPE_DISK && !bdrv_is_inserted(s->bs)) {
|
1277 |
error_report("Device needs media, but drive is empty");
|
1278 |
return -1; |
1279 |
} |
1280 |
|
1281 |
if (!s->serial) {
|
1282 |
/* try to fall back to value set with legacy -drive serial=... */
|
1283 |
dinfo = drive_get_by_blockdev(s->bs); |
1284 |
if (*dinfo->serial) {
|
1285 |
s->serial = g_strdup(dinfo->serial); |
1286 |
} |
1287 |
} |
1288 |
|
1289 |
if (!s->version) {
|
1290 |
s->version = g_strdup(QEMU_VERSION); |
1291 |
} |
1292 |
|
1293 |
if (bdrv_is_sg(s->bs)) {
|
1294 |
error_report("scsi-disk: unwanted /dev/sg*");
|
1295 |
return -1; |
1296 |
} |
1297 |
|
1298 |
if (scsi_type == TYPE_ROM) {
|
1299 |
bdrv_set_dev_ops(s->bs, &scsi_cd_block_ops, s); |
1300 |
s->qdev.blocksize = 2048;
|
1301 |
} else if (scsi_type == TYPE_DISK) { |
1302 |
s->qdev.blocksize = s->qdev.conf.logical_block_size; |
1303 |
} else {
|
1304 |
error_report("scsi-disk: Unhandled SCSI type %02x", scsi_type);
|
1305 |
return -1; |
1306 |
} |
1307 |
s->cluster_size = s->qdev.blocksize / 512;
|
1308 |
bdrv_set_buffer_alignment(s->bs, s->qdev.blocksize); |
1309 |
|
1310 |
s->qdev.type = scsi_type; |
1311 |
qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s); |
1312 |
bdrv_iostatus_enable(s->bs); |
1313 |
add_boot_device_path(s->qdev.conf.bootindex, &dev->qdev, ",0");
|
1314 |
return 0; |
1315 |
} |
1316 |
|
1317 |
static int scsi_hd_initfn(SCSIDevice *dev) |
1318 |
{ |
1319 |
return scsi_initfn(dev, TYPE_DISK);
|
1320 |
} |
1321 |
|
1322 |
static int scsi_cd_initfn(SCSIDevice *dev) |
1323 |
{ |
1324 |
return scsi_initfn(dev, TYPE_ROM);
|
1325 |
} |
1326 |
|
1327 |
static int scsi_disk_initfn(SCSIDevice *dev) |
1328 |
{ |
1329 |
DriveInfo *dinfo; |
1330 |
uint8_t scsi_type; |
1331 |
|
1332 |
if (!dev->conf.bs) {
|
1333 |
scsi_type = TYPE_DISK; /* will die in scsi_initfn() */
|
1334 |
} else {
|
1335 |
dinfo = drive_get_by_blockdev(dev->conf.bs); |
1336 |
scsi_type = dinfo->media_cd ? TYPE_ROM : TYPE_DISK; |
1337 |
} |
1338 |
|
1339 |
return scsi_initfn(dev, scsi_type);
|
1340 |
} |
1341 |
|
1342 |
static SCSIReqOps scsi_disk_reqops = {
|
1343 |
.size = sizeof(SCSIDiskReq),
|
1344 |
.free_req = scsi_free_request, |
1345 |
.send_command = scsi_send_command, |
1346 |
.read_data = scsi_read_data, |
1347 |
.write_data = scsi_write_data, |
1348 |
.cancel_io = scsi_cancel_io, |
1349 |
.get_buf = scsi_get_buf, |
1350 |
}; |
1351 |
|
1352 |
static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag,
|
1353 |
uint32_t lun, void *hba_private)
|
1354 |
{ |
1355 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
1356 |
SCSIRequest *req; |
1357 |
|
1358 |
req = scsi_req_alloc(&scsi_disk_reqops, &s->qdev, tag, lun, hba_private); |
1359 |
return req;
|
1360 |
} |
1361 |
|
1362 |
#define DEFINE_SCSI_DISK_PROPERTIES() \
|
1363 |
DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf), \ |
1364 |
DEFINE_PROP_STRING("ver", SCSIDiskState, version), \
|
1365 |
DEFINE_PROP_STRING("serial", SCSIDiskState, serial)
|
1366 |
|
1367 |
static SCSIDeviceInfo scsi_disk_info[] = {
|
1368 |
{ |
1369 |
.qdev.name = "scsi-hd",
|
1370 |
.qdev.fw_name = "disk",
|
1371 |
.qdev.desc = "virtual SCSI disk",
|
1372 |
.qdev.size = sizeof(SCSIDiskState),
|
1373 |
.qdev.reset = scsi_disk_reset, |
1374 |
.init = scsi_hd_initfn, |
1375 |
.destroy = scsi_destroy, |
1376 |
.alloc_req = scsi_new_request, |
1377 |
.unit_attention_reported = scsi_disk_unit_attention_reported, |
1378 |
.qdev.props = (Property[]) { |
1379 |
DEFINE_SCSI_DISK_PROPERTIES(), |
1380 |
DEFINE_PROP_BIT("removable", SCSIDiskState, removable, 0, false), |
1381 |
DEFINE_PROP_END_OF_LIST(), |
1382 |
} |
1383 |
},{ |
1384 |
.qdev.name = "scsi-cd",
|
1385 |
.qdev.fw_name = "disk",
|
1386 |
.qdev.desc = "virtual SCSI CD-ROM",
|
1387 |
.qdev.size = sizeof(SCSIDiskState),
|
1388 |
.qdev.reset = scsi_disk_reset, |
1389 |
.init = scsi_cd_initfn, |
1390 |
.destroy = scsi_destroy, |
1391 |
.alloc_req = scsi_new_request, |
1392 |
.unit_attention_reported = scsi_disk_unit_attention_reported, |
1393 |
.qdev.props = (Property[]) { |
1394 |
DEFINE_SCSI_DISK_PROPERTIES(), |
1395 |
DEFINE_PROP_END_OF_LIST(), |
1396 |
}, |
1397 |
},{ |
1398 |
.qdev.name = "scsi-disk", /* legacy -device scsi-disk */ |
1399 |
.qdev.fw_name = "disk",
|
1400 |
.qdev.desc = "virtual SCSI disk or CD-ROM (legacy)",
|
1401 |
.qdev.size = sizeof(SCSIDiskState),
|
1402 |
.qdev.reset = scsi_disk_reset, |
1403 |
.init = scsi_disk_initfn, |
1404 |
.destroy = scsi_destroy, |
1405 |
.alloc_req = scsi_new_request, |
1406 |
.unit_attention_reported = scsi_disk_unit_attention_reported, |
1407 |
.qdev.props = (Property[]) { |
1408 |
DEFINE_SCSI_DISK_PROPERTIES(), |
1409 |
DEFINE_PROP_BIT("removable", SCSIDiskState, removable, 0, false), |
1410 |
DEFINE_PROP_END_OF_LIST(), |
1411 |
} |
1412 |
} |
1413 |
}; |
1414 |
|
1415 |
static void scsi_disk_register_devices(void) |
1416 |
{ |
1417 |
int i;
|
1418 |
|
1419 |
for (i = 0; i < ARRAY_SIZE(scsi_disk_info); i++) { |
1420 |
scsi_qdev_register(&scsi_disk_info[i]); |
1421 |
} |
1422 |
} |
1423 |
device_init(scsi_disk_register_devices) |