root / hw / scsi-disk.c @ c557e889
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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 licenced 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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#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 SCSISense { |
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uint8_t key; |
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} SCSISense; |
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typedef struct SCSIDiskReq { |
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SCSIRequest req; |
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/* ??? We should probably keep track of whether the data transfer is
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a read or a write. Currently we rely on the host getting it right. */
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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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struct iovec iov;
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QEMUIOVector qiov; |
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uint32_t status; |
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} SCSIDiskReq; |
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typedef enum { SCSI_HD, SCSI_CD } SCSIDriveKind; |
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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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QEMUBH *bh; |
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char *version;
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char *serial;
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SCSISense sense; |
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SCSIDriveKind drive_kind; |
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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, uint8_t *outbuf); |
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static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag,
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uint32_t lun) |
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{ |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
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SCSIRequest *req; |
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SCSIDiskReq *r; |
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req = scsi_req_alloc(sizeof(SCSIDiskReq), &s->qdev, tag, lun);
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r = DO_UPCAST(SCSIDiskReq, req, req); |
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r->iov.iov_base = qemu_blockalign(s->bs, SCSI_DMA_BUF_SIZE); |
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return req;
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} |
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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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qemu_vfree(r->iov.iov_base); |
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} |
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static void scsi_disk_clear_sense(SCSIDiskState *s) |
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{ |
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memset(&s->sense, 0, sizeof(s->sense)); |
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} |
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static void scsi_disk_set_sense(SCSIDiskState *s, uint8_t key) |
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{ |
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s->sense.key = key; |
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} |
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static void scsi_req_set_status(SCSIDiskReq *r, int status, int sense_code) |
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{ |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
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r->req.status = status; |
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scsi_disk_set_sense(s, sense_code); |
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} |
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/* Helper function for command completion. */
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static void scsi_command_complete(SCSIDiskReq *r, int status, int sense) |
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{ |
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DPRINTF("Command complete tag=0x%x status=%d sense=%d\n",
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r->req.tag, status, sense); |
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scsi_req_set_status(r, status, sense); |
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scsi_req_complete(&r->req); |
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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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scsi_req_dequeue(&r->req); |
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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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int n;
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r->req.aiocb = NULL;
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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->iov.iov_len);
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n = r->iov.iov_len / 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->iov.iov_len); |
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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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scsi_command_complete(r, GOOD, NO_SENSE); |
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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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n = r->sector_count; |
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if (n > SCSI_DMA_BUF_SIZE / 512) |
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n = SCSI_DMA_BUF_SIZE / 512;
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r->iov.iov_len = n * 512;
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qemu_iovec_init_external(&r->qiov, &r->iov, 1);
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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(VMSTOP_DISKFULL); |
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} else {
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if (type == SCSI_REQ_STATUS_RETRY_READ) {
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scsi_req_data(&r->req, 0);
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} |
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scsi_command_complete(r, CHECK_CONDITION, |
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HARDWARE_ERROR); |
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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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uint32_t len; |
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uint32_t n; |
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r->req.aiocb = NULL;
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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->iov.iov_len / 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_command_complete(r, GOOD, NO_SENSE); |
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} else {
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len = r->sector_count * 512;
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if (len > SCSI_DMA_BUF_SIZE) {
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len = SCSI_DMA_BUF_SIZE; |
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} |
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r->iov.iov_len = len; |
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DPRINTF("Write complete tag=0x%x more=%d\n", r->req.tag, len);
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scsi_req_data(&r->req, len); |
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} |
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} |
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static int 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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n = r->iov.iov_len / 512;
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if (n) {
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qemu_iovec_init_external(&r->qiov, &r->iov, 1);
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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); |
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if (r->req.aiocb == NULL) { |
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scsi_write_complete(r, -EIO); |
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} |
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} else {
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/* Invoke completion routine to fetch data from host. */
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scsi_write_complete(r, 0);
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} |
288 |
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return 0; |
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} |
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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; |
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qemu_bh_delete(s->bh); |
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s->bh = NULL;
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QTAILQ_FOREACH(req, &s->qdev.requests, next) { |
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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 &= |
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~(SCSI_REQ_STATUS_RETRY | SCSI_REQ_STATUS_RETRY_TYPE_MASK); |
309 |
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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); |
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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, r->iov.iov_base); |
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if (ret == 0) { |
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scsi_command_complete(r, GOOD, NO_SENSE); |
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} |
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} |
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} |
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} |
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} |
326 |
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static void scsi_dma_restart_cb(void *opaque, int running, int reason) |
328 |
{ |
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SCSIDiskState *s = opaque; |
330 |
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if (!running)
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return;
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if (!s->bh) {
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s->bh = qemu_bh_new(scsi_dma_restart_bh, s); |
336 |
qemu_bh_schedule(s->bh); |
337 |
} |
338 |
} |
339 |
|
340 |
/* Return a pointer to the data buffer. */
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static uint8_t *scsi_get_buf(SCSIRequest *req)
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{ |
343 |
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
344 |
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return (uint8_t *)r->iov.iov_base;
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} |
347 |
|
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static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf) |
349 |
{ |
350 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
351 |
int buflen = 0; |
352 |
|
353 |
if (req->cmd.buf[1] & 0x2) { |
354 |
/* Command support data - optional, not implemented */
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355 |
BADF("optional INQUIRY command support request not implemented\n");
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return -1; |
357 |
} |
358 |
|
359 |
if (req->cmd.buf[1] & 0x1) { |
360 |
/* Vital product data */
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361 |
uint8_t page_code = req->cmd.buf[2];
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362 |
if (req->cmd.xfer < 4) { |
363 |
BADF("Error: Inquiry (EVPD[%02X]) buffer size %zd is "
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364 |
"less than 4\n", page_code, req->cmd.xfer);
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return -1; |
366 |
} |
367 |
|
368 |
if (s->drive_kind == SCSI_CD) {
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369 |
outbuf[buflen++] = 5;
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370 |
} else {
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371 |
outbuf[buflen++] = 0;
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372 |
} |
373 |
outbuf[buflen++] = page_code ; // this page
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374 |
outbuf[buflen++] = 0x00;
|
375 |
|
376 |
switch (page_code) {
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377 |
case 0x00: /* Supported page codes, mandatory */ |
378 |
{ |
379 |
int pages;
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380 |
DPRINTF("Inquiry EVPD[Supported pages] "
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381 |
"buffer size %zd\n", req->cmd.xfer);
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382 |
pages = buflen++; |
383 |
outbuf[buflen++] = 0x00; // list of supported pages (this page) |
384 |
outbuf[buflen++] = 0x80; // unit serial number |
385 |
outbuf[buflen++] = 0x83; // device identification |
386 |
if (s->drive_kind == SCSI_HD) {
|
387 |
outbuf[buflen++] = 0xb0; // block limits |
388 |
outbuf[buflen++] = 0xb2; // thin provisioning |
389 |
} |
390 |
outbuf[pages] = buflen - pages - 1; // number of pages |
391 |
break;
|
392 |
} |
393 |
case 0x80: /* Device serial number, optional */ |
394 |
{ |
395 |
int l = strlen(s->serial);
|
396 |
|
397 |
if (l > req->cmd.xfer)
|
398 |
l = req->cmd.xfer; |
399 |
if (l > 20) |
400 |
l = 20;
|
401 |
|
402 |
DPRINTF("Inquiry EVPD[Serial number] "
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403 |
"buffer size %zd\n", req->cmd.xfer);
|
404 |
outbuf[buflen++] = l; |
405 |
memcpy(outbuf+buflen, s->serial, l); |
406 |
buflen += l; |
407 |
break;
|
408 |
} |
409 |
|
410 |
case 0x83: /* Device identification page, mandatory */ |
411 |
{ |
412 |
int max_len = 255 - 8; |
413 |
int id_len = strlen(bdrv_get_device_name(s->bs));
|
414 |
|
415 |
if (id_len > max_len)
|
416 |
id_len = max_len; |
417 |
DPRINTF("Inquiry EVPD[Device identification] "
|
418 |
"buffer size %zd\n", req->cmd.xfer);
|
419 |
|
420 |
outbuf[buflen++] = 4 + id_len;
|
421 |
outbuf[buflen++] = 0x2; // ASCII |
422 |
outbuf[buflen++] = 0; // not officially assigned |
423 |
outbuf[buflen++] = 0; // reserved |
424 |
outbuf[buflen++] = id_len; // length of data following
|
425 |
|
426 |
memcpy(outbuf+buflen, bdrv_get_device_name(s->bs), id_len); |
427 |
buflen += id_len; |
428 |
break;
|
429 |
} |
430 |
case 0xb0: /* block limits */ |
431 |
{ |
432 |
unsigned int unmap_sectors = |
433 |
s->qdev.conf.discard_granularity / s->qdev.blocksize; |
434 |
unsigned int min_io_size = |
435 |
s->qdev.conf.min_io_size / s->qdev.blocksize; |
436 |
unsigned int opt_io_size = |
437 |
s->qdev.conf.opt_io_size / s->qdev.blocksize; |
438 |
|
439 |
if (s->drive_kind == SCSI_CD) {
|
440 |
DPRINTF("Inquiry (EVPD[%02X] not supported for CDROM\n",
|
441 |
page_code); |
442 |
return -1; |
443 |
} |
444 |
/* required VPD size with unmap support */
|
445 |
outbuf[3] = buflen = 0x3c; |
446 |
|
447 |
memset(outbuf + 4, 0, buflen - 4); |
448 |
|
449 |
/* optimal transfer length granularity */
|
450 |
outbuf[6] = (min_io_size >> 8) & 0xff; |
451 |
outbuf[7] = min_io_size & 0xff; |
452 |
|
453 |
/* optimal transfer length */
|
454 |
outbuf[12] = (opt_io_size >> 24) & 0xff; |
455 |
outbuf[13] = (opt_io_size >> 16) & 0xff; |
456 |
outbuf[14] = (opt_io_size >> 8) & 0xff; |
457 |
outbuf[15] = opt_io_size & 0xff; |
458 |
|
459 |
/* optimal unmap granularity */
|
460 |
outbuf[28] = (unmap_sectors >> 24) & 0xff; |
461 |
outbuf[29] = (unmap_sectors >> 16) & 0xff; |
462 |
outbuf[30] = (unmap_sectors >> 8) & 0xff; |
463 |
outbuf[31] = unmap_sectors & 0xff; |
464 |
break;
|
465 |
} |
466 |
case 0xb2: /* thin provisioning */ |
467 |
{ |
468 |
outbuf[3] = buflen = 8; |
469 |
outbuf[4] = 0; |
470 |
outbuf[5] = 0x40; /* write same with unmap supported */ |
471 |
outbuf[6] = 0; |
472 |
outbuf[7] = 0; |
473 |
break;
|
474 |
} |
475 |
default:
|
476 |
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
|
477 |
"buffer size %zd\n", page_code, req->cmd.xfer);
|
478 |
return -1; |
479 |
} |
480 |
/* done with EVPD */
|
481 |
return buflen;
|
482 |
} |
483 |
|
484 |
/* Standard INQUIRY data */
|
485 |
if (req->cmd.buf[2] != 0) { |
486 |
BADF("Error: Inquiry (STANDARD) page or code "
|
487 |
"is non-zero [%02X]\n", req->cmd.buf[2]); |
488 |
return -1; |
489 |
} |
490 |
|
491 |
/* PAGE CODE == 0 */
|
492 |
if (req->cmd.xfer < 5) { |
493 |
BADF("Error: Inquiry (STANDARD) buffer size %zd "
|
494 |
"is less than 5\n", req->cmd.xfer);
|
495 |
return -1; |
496 |
} |
497 |
|
498 |
buflen = req->cmd.xfer; |
499 |
if (buflen > SCSI_MAX_INQUIRY_LEN)
|
500 |
buflen = SCSI_MAX_INQUIRY_LEN; |
501 |
|
502 |
memset(outbuf, 0, buflen);
|
503 |
|
504 |
if (req->lun || req->cmd.buf[1] >> 5) { |
505 |
outbuf[0] = 0x7f; /* LUN not supported */ |
506 |
return buflen;
|
507 |
} |
508 |
|
509 |
if (s->drive_kind == SCSI_CD) {
|
510 |
outbuf[0] = 5; |
511 |
outbuf[1] = 0x80; |
512 |
memcpy(&outbuf[16], "QEMU CD-ROM ", 16); |
513 |
} else {
|
514 |
outbuf[0] = 0; |
515 |
outbuf[1] = s->removable ? 0x80 : 0; |
516 |
memcpy(&outbuf[16], "QEMU HARDDISK ", 16); |
517 |
} |
518 |
memcpy(&outbuf[8], "QEMU ", 8); |
519 |
memset(&outbuf[32], 0, 4); |
520 |
memcpy(&outbuf[32], s->version, MIN(4, strlen(s->version))); |
521 |
/*
|
522 |
* We claim conformance to SPC-3, which is required for guests
|
523 |
* to ask for modern features like READ CAPACITY(16) or the
|
524 |
* block characteristics VPD page by default. Not all of SPC-3
|
525 |
* is actually implemented, but we're good enough.
|
526 |
*/
|
527 |
outbuf[2] = 5; |
528 |
outbuf[3] = 2; /* Format 2 */ |
529 |
|
530 |
if (buflen > 36) { |
531 |
outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */ |
532 |
} else {
|
533 |
/* If the allocation length of CDB is too small,
|
534 |
the additional length is not adjusted */
|
535 |
outbuf[4] = 36 - 5; |
536 |
} |
537 |
|
538 |
/* Sync data transfer and TCQ. */
|
539 |
outbuf[7] = 0x10 | (req->bus->tcq ? 0x02 : 0); |
540 |
return buflen;
|
541 |
} |
542 |
|
543 |
static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p, |
544 |
int page_control)
|
545 |
{ |
546 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
547 |
BlockDriverState *bdrv = s->bs; |
548 |
int cylinders, heads, secs;
|
549 |
|
550 |
/*
|
551 |
* If Changeable Values are requested, a mask denoting those mode parameters
|
552 |
* that are changeable shall be returned. As we currently don't support
|
553 |
* parameter changes via MODE_SELECT all bits are returned set to zero.
|
554 |
* The buffer was already menset to zero by the caller of this function.
|
555 |
*/
|
556 |
switch (page) {
|
557 |
case 4: /* Rigid disk device geometry page. */ |
558 |
p[0] = 4; |
559 |
p[1] = 0x16; |
560 |
if (page_control == 1) { /* Changeable Values */ |
561 |
return p[1] + 2; |
562 |
} |
563 |
/* if a geometry hint is available, use it */
|
564 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
565 |
p[2] = (cylinders >> 16) & 0xff; |
566 |
p[3] = (cylinders >> 8) & 0xff; |
567 |
p[4] = cylinders & 0xff; |
568 |
p[5] = heads & 0xff; |
569 |
/* Write precomp start cylinder, disabled */
|
570 |
p[6] = (cylinders >> 16) & 0xff; |
571 |
p[7] = (cylinders >> 8) & 0xff; |
572 |
p[8] = cylinders & 0xff; |
573 |
/* Reduced current start cylinder, disabled */
|
574 |
p[9] = (cylinders >> 16) & 0xff; |
575 |
p[10] = (cylinders >> 8) & 0xff; |
576 |
p[11] = cylinders & 0xff; |
577 |
/* Device step rate [ns], 200ns */
|
578 |
p[12] = 0; |
579 |
p[13] = 200; |
580 |
/* Landing zone cylinder */
|
581 |
p[14] = 0xff; |
582 |
p[15] = 0xff; |
583 |
p[16] = 0xff; |
584 |
/* Medium rotation rate [rpm], 5400 rpm */
|
585 |
p[20] = (5400 >> 8) & 0xff; |
586 |
p[21] = 5400 & 0xff; |
587 |
return p[1] + 2; |
588 |
|
589 |
case 5: /* Flexible disk device geometry page. */ |
590 |
p[0] = 5; |
591 |
p[1] = 0x1e; |
592 |
if (page_control == 1) { /* Changeable Values */ |
593 |
return p[1] + 2; |
594 |
} |
595 |
/* Transfer rate [kbit/s], 5Mbit/s */
|
596 |
p[2] = 5000 >> 8; |
597 |
p[3] = 5000 & 0xff; |
598 |
/* if a geometry hint is available, use it */
|
599 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
600 |
p[4] = heads & 0xff; |
601 |
p[5] = secs & 0xff; |
602 |
p[6] = s->cluster_size * 2; |
603 |
p[8] = (cylinders >> 8) & 0xff; |
604 |
p[9] = cylinders & 0xff; |
605 |
/* Write precomp start cylinder, disabled */
|
606 |
p[10] = (cylinders >> 8) & 0xff; |
607 |
p[11] = cylinders & 0xff; |
608 |
/* Reduced current start cylinder, disabled */
|
609 |
p[12] = (cylinders >> 8) & 0xff; |
610 |
p[13] = cylinders & 0xff; |
611 |
/* Device step rate [100us], 100us */
|
612 |
p[14] = 0; |
613 |
p[15] = 1; |
614 |
/* Device step pulse width [us], 1us */
|
615 |
p[16] = 1; |
616 |
/* Device head settle delay [100us], 100us */
|
617 |
p[17] = 0; |
618 |
p[18] = 1; |
619 |
/* Motor on delay [0.1s], 0.1s */
|
620 |
p[19] = 1; |
621 |
/* Motor off delay [0.1s], 0.1s */
|
622 |
p[20] = 1; |
623 |
/* Medium rotation rate [rpm], 5400 rpm */
|
624 |
p[28] = (5400 >> 8) & 0xff; |
625 |
p[29] = 5400 & 0xff; |
626 |
return p[1] + 2; |
627 |
|
628 |
case 8: /* Caching page. */ |
629 |
p[0] = 8; |
630 |
p[1] = 0x12; |
631 |
if (page_control == 1) { /* Changeable Values */ |
632 |
return p[1] + 2; |
633 |
} |
634 |
if (bdrv_enable_write_cache(s->bs)) {
|
635 |
p[2] = 4; /* WCE */ |
636 |
} |
637 |
return p[1] + 2; |
638 |
|
639 |
case 0x2a: /* CD Capabilities and Mechanical Status page. */ |
640 |
if (s->drive_kind != SCSI_CD)
|
641 |
return 0; |
642 |
p[0] = 0x2a; |
643 |
p[1] = 0x14; |
644 |
if (page_control == 1) { /* Changeable Values */ |
645 |
return p[1] + 2; |
646 |
} |
647 |
p[2] = 3; // CD-R & CD-RW read |
648 |
p[3] = 0; // Writing not supported |
649 |
p[4] = 0x7f; /* Audio, composite, digital out, |
650 |
mode 2 form 1&2, multi session */
|
651 |
p[5] = 0xff; /* CD DA, DA accurate, RW supported, |
652 |
RW corrected, C2 errors, ISRC,
|
653 |
UPC, Bar code */
|
654 |
p[6] = 0x2d | (bdrv_is_locked(s->bs)? 2 : 0); |
655 |
/* Locking supported, jumper present, eject, tray */
|
656 |
p[7] = 0; /* no volume & mute control, no |
657 |
changer */
|
658 |
p[8] = (50 * 176) >> 8; // 50x read speed |
659 |
p[9] = (50 * 176) & 0xff; |
660 |
p[10] = 0 >> 8; // No volume |
661 |
p[11] = 0 & 0xff; |
662 |
p[12] = 2048 >> 8; // 2M buffer |
663 |
p[13] = 2048 & 0xff; |
664 |
p[14] = (16 * 176) >> 8; // 16x read speed current |
665 |
p[15] = (16 * 176) & 0xff; |
666 |
p[18] = (16 * 176) >> 8; // 16x write speed |
667 |
p[19] = (16 * 176) & 0xff; |
668 |
p[20] = (16 * 176) >> 8; // 16x write speed current |
669 |
p[21] = (16 * 176) & 0xff; |
670 |
return p[1] + 2; |
671 |
|
672 |
default:
|
673 |
return 0; |
674 |
} |
675 |
} |
676 |
|
677 |
static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf) |
678 |
{ |
679 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
680 |
uint64_t nb_sectors; |
681 |
int page, dbd, buflen, page_control;
|
682 |
uint8_t *p; |
683 |
uint8_t dev_specific_param; |
684 |
|
685 |
dbd = req->cmd.buf[1] & 0x8; |
686 |
page = req->cmd.buf[2] & 0x3f; |
687 |
page_control = (req->cmd.buf[2] & 0xc0) >> 6; |
688 |
DPRINTF("Mode Sense(%d) (page %d, xfer %zd, page_control %d)\n",
|
689 |
(req->cmd.buf[0] == MODE_SENSE) ? 6 : 10, page, req->cmd.xfer, page_control); |
690 |
memset(outbuf, 0, req->cmd.xfer);
|
691 |
p = outbuf; |
692 |
|
693 |
if (bdrv_is_read_only(s->bs)) {
|
694 |
dev_specific_param = 0x80; /* Readonly. */ |
695 |
} else {
|
696 |
dev_specific_param = 0x00;
|
697 |
} |
698 |
|
699 |
if (req->cmd.buf[0] == MODE_SENSE) { |
700 |
p[1] = 0; /* Default media type. */ |
701 |
p[2] = dev_specific_param;
|
702 |
p[3] = 0; /* Block descriptor length. */ |
703 |
p += 4;
|
704 |
} else { /* MODE_SENSE_10 */ |
705 |
p[2] = 0; /* Default media type. */ |
706 |
p[3] = dev_specific_param;
|
707 |
p[6] = p[7] = 0; /* Block descriptor length. */ |
708 |
p += 8;
|
709 |
} |
710 |
|
711 |
bdrv_get_geometry(s->bs, &nb_sectors); |
712 |
if (!dbd && nb_sectors) {
|
713 |
if (req->cmd.buf[0] == MODE_SENSE) { |
714 |
outbuf[3] = 8; /* Block descriptor length */ |
715 |
} else { /* MODE_SENSE_10 */ |
716 |
outbuf[7] = 8; /* Block descriptor length */ |
717 |
} |
718 |
nb_sectors /= s->cluster_size; |
719 |
if (nb_sectors > 0xffffff) |
720 |
nb_sectors = 0;
|
721 |
p[0] = 0; /* media density code */ |
722 |
p[1] = (nb_sectors >> 16) & 0xff; |
723 |
p[2] = (nb_sectors >> 8) & 0xff; |
724 |
p[3] = nb_sectors & 0xff; |
725 |
p[4] = 0; /* reserved */ |
726 |
p[5] = 0; /* bytes 5-7 are the sector size in bytes */ |
727 |
p[6] = s->cluster_size * 2; |
728 |
p[7] = 0; |
729 |
p += 8;
|
730 |
} |
731 |
|
732 |
if (page_control == 3) { /* Saved Values */ |
733 |
return -1; /* ILLEGAL_REQUEST */ |
734 |
} |
735 |
|
736 |
switch (page) {
|
737 |
case 0x04: |
738 |
case 0x05: |
739 |
case 0x08: |
740 |
case 0x2a: |
741 |
p += mode_sense_page(req, page, p, page_control); |
742 |
break;
|
743 |
case 0x3f: |
744 |
p += mode_sense_page(req, 0x08, p, page_control);
|
745 |
p += mode_sense_page(req, 0x2a, p, page_control);
|
746 |
break;
|
747 |
default:
|
748 |
return -1; /* ILLEGAL_REQUEST */ |
749 |
} |
750 |
|
751 |
buflen = p - outbuf; |
752 |
/*
|
753 |
* The mode data length field specifies the length in bytes of the
|
754 |
* following data that is available to be transferred. The mode data
|
755 |
* length does not include itself.
|
756 |
*/
|
757 |
if (req->cmd.buf[0] == MODE_SENSE) { |
758 |
outbuf[0] = buflen - 1; |
759 |
} else { /* MODE_SENSE_10 */ |
760 |
outbuf[0] = ((buflen - 2) >> 8) & 0xff; |
761 |
outbuf[1] = (buflen - 2) & 0xff; |
762 |
} |
763 |
if (buflen > req->cmd.xfer)
|
764 |
buflen = req->cmd.xfer; |
765 |
return buflen;
|
766 |
} |
767 |
|
768 |
static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf) |
769 |
{ |
770 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
771 |
int start_track, format, msf, toclen;
|
772 |
uint64_t nb_sectors; |
773 |
|
774 |
msf = req->cmd.buf[1] & 2; |
775 |
format = req->cmd.buf[2] & 0xf; |
776 |
start_track = req->cmd.buf[6];
|
777 |
bdrv_get_geometry(s->bs, &nb_sectors); |
778 |
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
779 |
nb_sectors /= s->cluster_size; |
780 |
switch (format) {
|
781 |
case 0: |
782 |
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); |
783 |
break;
|
784 |
case 1: |
785 |
/* multi session : only a single session defined */
|
786 |
toclen = 12;
|
787 |
memset(outbuf, 0, 12); |
788 |
outbuf[1] = 0x0a; |
789 |
outbuf[2] = 0x01; |
790 |
outbuf[3] = 0x01; |
791 |
break;
|
792 |
case 2: |
793 |
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); |
794 |
break;
|
795 |
default:
|
796 |
return -1; |
797 |
} |
798 |
if (toclen > req->cmd.xfer)
|
799 |
toclen = req->cmd.xfer; |
800 |
return toclen;
|
801 |
} |
802 |
|
803 |
static int scsi_disk_emulate_command(SCSIDiskReq *r, uint8_t *outbuf) |
804 |
{ |
805 |
SCSIRequest *req = &r->req; |
806 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
807 |
uint64_t nb_sectors; |
808 |
int buflen = 0; |
809 |
int ret;
|
810 |
|
811 |
switch (req->cmd.buf[0]) { |
812 |
case TEST_UNIT_READY:
|
813 |
if (!bdrv_is_inserted(s->bs))
|
814 |
goto not_ready;
|
815 |
break;
|
816 |
case REQUEST_SENSE:
|
817 |
if (req->cmd.xfer < 4) |
818 |
goto illegal_request;
|
819 |
memset(outbuf, 0, 4); |
820 |
buflen = 4;
|
821 |
if (s->sense.key == NOT_READY && req->cmd.xfer >= 18) { |
822 |
memset(outbuf, 0, 18); |
823 |
buflen = 18;
|
824 |
outbuf[7] = 10; |
825 |
/* asc 0x3a, ascq 0: Medium not present */
|
826 |
outbuf[12] = 0x3a; |
827 |
outbuf[13] = 0; |
828 |
} |
829 |
outbuf[0] = 0xf0; |
830 |
outbuf[1] = 0; |
831 |
outbuf[2] = s->sense.key;
|
832 |
scsi_disk_clear_sense(s); |
833 |
break;
|
834 |
case INQUIRY:
|
835 |
buflen = scsi_disk_emulate_inquiry(req, outbuf); |
836 |
if (buflen < 0) |
837 |
goto illegal_request;
|
838 |
break;
|
839 |
case MODE_SENSE:
|
840 |
case MODE_SENSE_10:
|
841 |
buflen = scsi_disk_emulate_mode_sense(req, outbuf); |
842 |
if (buflen < 0) |
843 |
goto illegal_request;
|
844 |
break;
|
845 |
case READ_TOC:
|
846 |
buflen = scsi_disk_emulate_read_toc(req, outbuf); |
847 |
if (buflen < 0) |
848 |
goto illegal_request;
|
849 |
break;
|
850 |
case RESERVE:
|
851 |
if (req->cmd.buf[1] & 1) |
852 |
goto illegal_request;
|
853 |
break;
|
854 |
case RESERVE_10:
|
855 |
if (req->cmd.buf[1] & 3) |
856 |
goto illegal_request;
|
857 |
break;
|
858 |
case RELEASE:
|
859 |
if (req->cmd.buf[1] & 1) |
860 |
goto illegal_request;
|
861 |
break;
|
862 |
case RELEASE_10:
|
863 |
if (req->cmd.buf[1] & 3) |
864 |
goto illegal_request;
|
865 |
break;
|
866 |
case START_STOP:
|
867 |
if (s->drive_kind == SCSI_CD && (req->cmd.buf[4] & 2)) { |
868 |
/* load/eject medium */
|
869 |
bdrv_eject(s->bs, !(req->cmd.buf[4] & 1)); |
870 |
} |
871 |
break;
|
872 |
case ALLOW_MEDIUM_REMOVAL:
|
873 |
bdrv_set_locked(s->bs, req->cmd.buf[4] & 1); |
874 |
break;
|
875 |
case READ_CAPACITY:
|
876 |
/* The normal LEN field for this command is zero. */
|
877 |
memset(outbuf, 0, 8); |
878 |
bdrv_get_geometry(s->bs, &nb_sectors); |
879 |
if (!nb_sectors)
|
880 |
goto not_ready;
|
881 |
nb_sectors /= s->cluster_size; |
882 |
/* Returned value is the address of the last sector. */
|
883 |
nb_sectors--; |
884 |
/* Remember the new size for read/write sanity checking. */
|
885 |
s->max_lba = nb_sectors; |
886 |
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
|
887 |
if (nb_sectors > UINT32_MAX)
|
888 |
nb_sectors = UINT32_MAX; |
889 |
outbuf[0] = (nb_sectors >> 24) & 0xff; |
890 |
outbuf[1] = (nb_sectors >> 16) & 0xff; |
891 |
outbuf[2] = (nb_sectors >> 8) & 0xff; |
892 |
outbuf[3] = nb_sectors & 0xff; |
893 |
outbuf[4] = 0; |
894 |
outbuf[5] = 0; |
895 |
outbuf[6] = s->cluster_size * 2; |
896 |
outbuf[7] = 0; |
897 |
buflen = 8;
|
898 |
break;
|
899 |
case SYNCHRONIZE_CACHE:
|
900 |
ret = bdrv_flush(s->bs); |
901 |
if (ret < 0) { |
902 |
if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_FLUSH)) {
|
903 |
return -1; |
904 |
} |
905 |
} |
906 |
break;
|
907 |
case GET_CONFIGURATION:
|
908 |
memset(outbuf, 0, 8); |
909 |
/* ??? This should probably return much more information. For now
|
910 |
just return the basic header indicating the CD-ROM profile. */
|
911 |
outbuf[7] = 8; // CD-ROM |
912 |
buflen = 8;
|
913 |
break;
|
914 |
case SERVICE_ACTION_IN:
|
915 |
/* Service Action In subcommands. */
|
916 |
if ((req->cmd.buf[1] & 31) == 0x10) { |
917 |
DPRINTF("SAI READ CAPACITY(16)\n");
|
918 |
memset(outbuf, 0, req->cmd.xfer);
|
919 |
bdrv_get_geometry(s->bs, &nb_sectors); |
920 |
if (!nb_sectors)
|
921 |
goto not_ready;
|
922 |
nb_sectors /= s->cluster_size; |
923 |
/* Returned value is the address of the last sector. */
|
924 |
nb_sectors--; |
925 |
/* Remember the new size for read/write sanity checking. */
|
926 |
s->max_lba = nb_sectors; |
927 |
outbuf[0] = (nb_sectors >> 56) & 0xff; |
928 |
outbuf[1] = (nb_sectors >> 48) & 0xff; |
929 |
outbuf[2] = (nb_sectors >> 40) & 0xff; |
930 |
outbuf[3] = (nb_sectors >> 32) & 0xff; |
931 |
outbuf[4] = (nb_sectors >> 24) & 0xff; |
932 |
outbuf[5] = (nb_sectors >> 16) & 0xff; |
933 |
outbuf[6] = (nb_sectors >> 8) & 0xff; |
934 |
outbuf[7] = nb_sectors & 0xff; |
935 |
outbuf[8] = 0; |
936 |
outbuf[9] = 0; |
937 |
outbuf[10] = s->cluster_size * 2; |
938 |
outbuf[11] = 0; |
939 |
outbuf[12] = 0; |
940 |
outbuf[13] = get_physical_block_exp(&s->qdev.conf);
|
941 |
|
942 |
/* set TPE bit if the format supports discard */
|
943 |
if (s->qdev.conf.discard_granularity) {
|
944 |
outbuf[14] = 0x80; |
945 |
} |
946 |
|
947 |
/* Protection, exponent and lowest lba field left blank. */
|
948 |
buflen = req->cmd.xfer; |
949 |
break;
|
950 |
} |
951 |
DPRINTF("Unsupported Service Action In\n");
|
952 |
goto illegal_request;
|
953 |
case REPORT_LUNS:
|
954 |
if (req->cmd.xfer < 16) |
955 |
goto illegal_request;
|
956 |
memset(outbuf, 0, 16); |
957 |
outbuf[3] = 8; |
958 |
buflen = 16;
|
959 |
break;
|
960 |
case VERIFY:
|
961 |
break;
|
962 |
case REZERO_UNIT:
|
963 |
DPRINTF("Rezero Unit\n");
|
964 |
if (!bdrv_is_inserted(s->bs)) {
|
965 |
goto not_ready;
|
966 |
} |
967 |
break;
|
968 |
default:
|
969 |
goto illegal_request;
|
970 |
} |
971 |
scsi_req_set_status(r, GOOD, NO_SENSE); |
972 |
return buflen;
|
973 |
|
974 |
not_ready:
|
975 |
scsi_command_complete(r, CHECK_CONDITION, NOT_READY); |
976 |
return -1; |
977 |
|
978 |
illegal_request:
|
979 |
scsi_command_complete(r, CHECK_CONDITION, ILLEGAL_REQUEST); |
980 |
return -1; |
981 |
} |
982 |
|
983 |
/* Execute a scsi command. Returns the length of the data expected by the
|
984 |
command. This will be Positive for data transfers from the device
|
985 |
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
986 |
and zero if the command does not transfer any data. */
|
987 |
|
988 |
static int32_t scsi_send_command(SCSIRequest *req, uint8_t *buf)
|
989 |
{ |
990 |
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
991 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
992 |
int32_t len; |
993 |
int is_write;
|
994 |
uint8_t command; |
995 |
uint8_t *outbuf; |
996 |
int rc;
|
997 |
|
998 |
scsi_req_enqueue(req); |
999 |
command = buf[0];
|
1000 |
outbuf = (uint8_t *)r->iov.iov_base; |
1001 |
is_write = 0;
|
1002 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]); |
1003 |
|
1004 |
if (scsi_req_parse(&r->req, buf) != 0) { |
1005 |
BADF("Unsupported command length, command %x\n", command);
|
1006 |
goto fail;
|
1007 |
} |
1008 |
#ifdef DEBUG_SCSI
|
1009 |
{ |
1010 |
int i;
|
1011 |
for (i = 1; i < r->req.cmd.len; i++) { |
1012 |
printf(" 0x%02x", buf[i]);
|
1013 |
} |
1014 |
printf("\n");
|
1015 |
} |
1016 |
#endif
|
1017 |
|
1018 |
if (req->lun || buf[1] >> 5) { |
1019 |
/* Only LUN 0 supported. */
|
1020 |
DPRINTF("Unimplemented LUN %d\n", req->lun ? req->lun : buf[1] >> 5); |
1021 |
if (command != REQUEST_SENSE && command != INQUIRY)
|
1022 |
goto fail;
|
1023 |
} |
1024 |
switch (command) {
|
1025 |
case TEST_UNIT_READY:
|
1026 |
case REQUEST_SENSE:
|
1027 |
case INQUIRY:
|
1028 |
case MODE_SENSE:
|
1029 |
case MODE_SENSE_10:
|
1030 |
case RESERVE:
|
1031 |
case RESERVE_10:
|
1032 |
case RELEASE:
|
1033 |
case RELEASE_10:
|
1034 |
case START_STOP:
|
1035 |
case ALLOW_MEDIUM_REMOVAL:
|
1036 |
case READ_CAPACITY:
|
1037 |
case SYNCHRONIZE_CACHE:
|
1038 |
case READ_TOC:
|
1039 |
case GET_CONFIGURATION:
|
1040 |
case SERVICE_ACTION_IN:
|
1041 |
case REPORT_LUNS:
|
1042 |
case VERIFY:
|
1043 |
case REZERO_UNIT:
|
1044 |
rc = scsi_disk_emulate_command(r, outbuf); |
1045 |
if (rc < 0) { |
1046 |
return 0; |
1047 |
} |
1048 |
|
1049 |
r->iov.iov_len = rc; |
1050 |
break;
|
1051 |
case READ_6:
|
1052 |
case READ_10:
|
1053 |
case READ_12:
|
1054 |
case READ_16:
|
1055 |
len = r->req.cmd.xfer / s->qdev.blocksize; |
1056 |
DPRINTF("Read (sector %" PRId64 ", count %d)\n", r->req.cmd.lba, len); |
1057 |
if (r->req.cmd.lba > s->max_lba)
|
1058 |
goto illegal_lba;
|
1059 |
r->sector = r->req.cmd.lba * s->cluster_size; |
1060 |
r->sector_count = len * s->cluster_size; |
1061 |
break;
|
1062 |
case WRITE_6:
|
1063 |
case WRITE_10:
|
1064 |
case WRITE_12:
|
1065 |
case WRITE_16:
|
1066 |
case WRITE_VERIFY:
|
1067 |
case WRITE_VERIFY_12:
|
1068 |
case WRITE_VERIFY_16:
|
1069 |
len = r->req.cmd.xfer / s->qdev.blocksize; |
1070 |
DPRINTF("Write %s(sector %" PRId64 ", count %d)\n", |
1071 |
(command & 0xe) == 0xe ? "And Verify " : "", |
1072 |
r->req.cmd.lba, len); |
1073 |
if (r->req.cmd.lba > s->max_lba)
|
1074 |
goto illegal_lba;
|
1075 |
r->sector = r->req.cmd.lba * s->cluster_size; |
1076 |
r->sector_count = len * s->cluster_size; |
1077 |
is_write = 1;
|
1078 |
break;
|
1079 |
case MODE_SELECT:
|
1080 |
DPRINTF("Mode Select(6) (len %lu)\n", (long)r->req.cmd.xfer); |
1081 |
/* We don't support mode parameter changes.
|
1082 |
Allow the mode parameter header + block descriptors only. */
|
1083 |
if (r->req.cmd.xfer > 12) { |
1084 |
goto fail;
|
1085 |
} |
1086 |
break;
|
1087 |
case MODE_SELECT_10:
|
1088 |
DPRINTF("Mode Select(10) (len %lu)\n", (long)r->req.cmd.xfer); |
1089 |
/* We don't support mode parameter changes.
|
1090 |
Allow the mode parameter header + block descriptors only. */
|
1091 |
if (r->req.cmd.xfer > 16) { |
1092 |
goto fail;
|
1093 |
} |
1094 |
break;
|
1095 |
case SEEK_6:
|
1096 |
case SEEK_10:
|
1097 |
DPRINTF("Seek(%d) (sector %" PRId64 ")\n", command == SEEK_6 ? 6 : 10, |
1098 |
r->req.cmd.lba); |
1099 |
if (r->req.cmd.lba > s->max_lba) {
|
1100 |
goto illegal_lba;
|
1101 |
} |
1102 |
break;
|
1103 |
case WRITE_SAME_16:
|
1104 |
len = r->req.cmd.xfer / s->qdev.blocksize; |
1105 |
|
1106 |
DPRINTF("WRITE SAME(16) (sector %" PRId64 ", count %d)\n", |
1107 |
r->req.cmd.lba, len); |
1108 |
|
1109 |
if (r->req.cmd.lba > s->max_lba) {
|
1110 |
goto illegal_lba;
|
1111 |
} |
1112 |
|
1113 |
/*
|
1114 |
* We only support WRITE SAME with the unmap bit set for now.
|
1115 |
*/
|
1116 |
if (!(buf[1] & 0x8)) { |
1117 |
goto fail;
|
1118 |
} |
1119 |
|
1120 |
rc = bdrv_discard(s->bs, r->req.cmd.lba * s->cluster_size, |
1121 |
len * s->cluster_size); |
1122 |
if (rc < 0) { |
1123 |
/* XXX: better error code ?*/
|
1124 |
goto fail;
|
1125 |
} |
1126 |
|
1127 |
break;
|
1128 |
default:
|
1129 |
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
1130 |
fail:
|
1131 |
scsi_command_complete(r, CHECK_CONDITION, ILLEGAL_REQUEST); |
1132 |
return 0; |
1133 |
illegal_lba:
|
1134 |
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
1135 |
return 0; |
1136 |
} |
1137 |
if (r->sector_count == 0 && r->iov.iov_len == 0) { |
1138 |
scsi_command_complete(r, GOOD, NO_SENSE); |
1139 |
} |
1140 |
len = r->sector_count * 512 + r->iov.iov_len;
|
1141 |
if (is_write) {
|
1142 |
len = -len; |
1143 |
} else {
|
1144 |
if (!r->sector_count)
|
1145 |
r->sector_count = -1;
|
1146 |
} |
1147 |
return len;
|
1148 |
} |
1149 |
|
1150 |
static void scsi_disk_reset(DeviceState *dev) |
1151 |
{ |
1152 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev); |
1153 |
uint64_t nb_sectors; |
1154 |
|
1155 |
scsi_device_purge_requests(&s->qdev); |
1156 |
|
1157 |
bdrv_get_geometry(s->bs, &nb_sectors); |
1158 |
nb_sectors /= s->cluster_size; |
1159 |
if (nb_sectors) {
|
1160 |
nb_sectors--; |
1161 |
} |
1162 |
s->max_lba = nb_sectors; |
1163 |
} |
1164 |
|
1165 |
static void scsi_destroy(SCSIDevice *dev) |
1166 |
{ |
1167 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
1168 |
|
1169 |
scsi_device_purge_requests(&s->qdev); |
1170 |
blockdev_mark_auto_del(s->qdev.conf.bs); |
1171 |
} |
1172 |
|
1173 |
static int scsi_initfn(SCSIDevice *dev, SCSIDriveKind kind) |
1174 |
{ |
1175 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
1176 |
DriveInfo *dinfo; |
1177 |
|
1178 |
if (!s->qdev.conf.bs) {
|
1179 |
error_report("scsi-disk: drive property not set");
|
1180 |
return -1; |
1181 |
} |
1182 |
s->bs = s->qdev.conf.bs; |
1183 |
s->drive_kind = kind; |
1184 |
|
1185 |
if (kind == SCSI_HD && !bdrv_is_inserted(s->bs)) {
|
1186 |
error_report("Device needs media, but drive is empty");
|
1187 |
return -1; |
1188 |
} |
1189 |
|
1190 |
if (!s->serial) {
|
1191 |
/* try to fall back to value set with legacy -drive serial=... */
|
1192 |
dinfo = drive_get_by_blockdev(s->bs); |
1193 |
s->serial = qemu_strdup(*dinfo->serial ? dinfo->serial : "0");
|
1194 |
} |
1195 |
|
1196 |
if (!s->version) {
|
1197 |
s->version = qemu_strdup(QEMU_VERSION); |
1198 |
} |
1199 |
|
1200 |
if (bdrv_is_sg(s->bs)) {
|
1201 |
error_report("scsi-disk: unwanted /dev/sg*");
|
1202 |
return -1; |
1203 |
} |
1204 |
|
1205 |
if (kind == SCSI_CD) {
|
1206 |
s->qdev.blocksize = 2048;
|
1207 |
} else {
|
1208 |
s->qdev.blocksize = s->qdev.conf.logical_block_size; |
1209 |
} |
1210 |
s->cluster_size = s->qdev.blocksize / 512;
|
1211 |
s->bs->buffer_alignment = s->qdev.blocksize; |
1212 |
|
1213 |
s->qdev.type = TYPE_DISK; |
1214 |
qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s); |
1215 |
bdrv_set_removable(s->bs, kind == SCSI_CD); |
1216 |
add_boot_device_path(s->qdev.conf.bootindex, &dev->qdev, ",0");
|
1217 |
return 0; |
1218 |
} |
1219 |
|
1220 |
static int scsi_hd_initfn(SCSIDevice *dev) |
1221 |
{ |
1222 |
return scsi_initfn(dev, SCSI_HD);
|
1223 |
} |
1224 |
|
1225 |
static int scsi_cd_initfn(SCSIDevice *dev) |
1226 |
{ |
1227 |
return scsi_initfn(dev, SCSI_CD);
|
1228 |
} |
1229 |
|
1230 |
static int scsi_disk_initfn(SCSIDevice *dev) |
1231 |
{ |
1232 |
SCSIDriveKind kind; |
1233 |
DriveInfo *dinfo; |
1234 |
|
1235 |
if (!dev->conf.bs) {
|
1236 |
kind = SCSI_HD; /* will die in scsi_initfn() */
|
1237 |
} else {
|
1238 |
dinfo = drive_get_by_blockdev(dev->conf.bs); |
1239 |
kind = dinfo->media_cd ? SCSI_CD : SCSI_HD; |
1240 |
} |
1241 |
|
1242 |
return scsi_initfn(dev, kind);
|
1243 |
} |
1244 |
|
1245 |
#define DEFINE_SCSI_DISK_PROPERTIES() \
|
1246 |
DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf), \ |
1247 |
DEFINE_PROP_STRING("ver", SCSIDiskState, version), \
|
1248 |
DEFINE_PROP_STRING("serial", SCSIDiskState, serial)
|
1249 |
|
1250 |
static SCSIDeviceInfo scsi_disk_info[] = {
|
1251 |
{ |
1252 |
.qdev.name = "scsi-hd",
|
1253 |
.qdev.fw_name = "disk",
|
1254 |
.qdev.desc = "virtual SCSI disk",
|
1255 |
.qdev.size = sizeof(SCSIDiskState),
|
1256 |
.qdev.reset = scsi_disk_reset, |
1257 |
.init = scsi_hd_initfn, |
1258 |
.destroy = scsi_destroy, |
1259 |
.alloc_req = scsi_new_request, |
1260 |
.free_req = scsi_free_request, |
1261 |
.send_command = scsi_send_command, |
1262 |
.read_data = scsi_read_data, |
1263 |
.write_data = scsi_write_data, |
1264 |
.cancel_io = scsi_cancel_io, |
1265 |
.get_buf = scsi_get_buf, |
1266 |
.qdev.props = (Property[]) { |
1267 |
DEFINE_SCSI_DISK_PROPERTIES(), |
1268 |
DEFINE_PROP_BIT("removable", SCSIDiskState, removable, 0, false), |
1269 |
DEFINE_PROP_END_OF_LIST(), |
1270 |
} |
1271 |
},{ |
1272 |
.qdev.name = "scsi-cd",
|
1273 |
.qdev.fw_name = "disk",
|
1274 |
.qdev.desc = "virtual SCSI CD-ROM",
|
1275 |
.qdev.size = sizeof(SCSIDiskState),
|
1276 |
.qdev.reset = scsi_disk_reset, |
1277 |
.init = scsi_cd_initfn, |
1278 |
.destroy = scsi_destroy, |
1279 |
.alloc_req = scsi_new_request, |
1280 |
.free_req = scsi_free_request, |
1281 |
.send_command = scsi_send_command, |
1282 |
.read_data = scsi_read_data, |
1283 |
.write_data = scsi_write_data, |
1284 |
.cancel_io = scsi_cancel_io, |
1285 |
.get_buf = scsi_get_buf, |
1286 |
.qdev.props = (Property[]) { |
1287 |
DEFINE_SCSI_DISK_PROPERTIES(), |
1288 |
DEFINE_PROP_END_OF_LIST(), |
1289 |
}, |
1290 |
},{ |
1291 |
.qdev.name = "scsi-disk", /* legacy -device scsi-disk */ |
1292 |
.qdev.fw_name = "disk",
|
1293 |
.qdev.desc = "virtual SCSI disk or CD-ROM (legacy)",
|
1294 |
.qdev.size = sizeof(SCSIDiskState),
|
1295 |
.qdev.reset = scsi_disk_reset, |
1296 |
.init = scsi_disk_initfn, |
1297 |
.destroy = scsi_destroy, |
1298 |
.alloc_req = scsi_new_request, |
1299 |
.free_req = scsi_free_request, |
1300 |
.send_command = scsi_send_command, |
1301 |
.read_data = scsi_read_data, |
1302 |
.write_data = scsi_write_data, |
1303 |
.cancel_io = scsi_cancel_io, |
1304 |
.get_buf = scsi_get_buf, |
1305 |
.qdev.props = (Property[]) { |
1306 |
DEFINE_SCSI_DISK_PROPERTIES(), |
1307 |
DEFINE_PROP_BIT("removable", SCSIDiskState, removable, 0, false), |
1308 |
DEFINE_PROP_END_OF_LIST(), |
1309 |
} |
1310 |
} |
1311 |
}; |
1312 |
|
1313 |
static void scsi_disk_register_devices(void) |
1314 |
{ |
1315 |
int i;
|
1316 |
|
1317 |
for (i = 0; i < ARRAY_SIZE(scsi_disk_info); i++) { |
1318 |
scsi_qdev_register(&scsi_disk_info[i]); |
1319 |
} |
1320 |
} |
1321 |
device_init(scsi_disk_register_devices) |