root / hw / scsi-disk.c @ 8af7a3ab
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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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typedef struct SCSIDiskState SCSIDiskState; |
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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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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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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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}; |
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static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type); |
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static SCSIDiskReq *scsi_new_request(SCSIDiskState *s, uint32_t tag,
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uint32_t lun) |
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{ |
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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 r;
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} |
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static void scsi_remove_request(SCSIDiskReq *r) |
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{ |
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qemu_vfree(r->iov.iov_base); |
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scsi_req_free(&r->req); |
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} |
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static SCSIDiskReq *scsi_find_request(SCSIDiskState *s, uint32_t tag)
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{ |
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return DO_UPCAST(SCSIDiskReq, req, scsi_req_find(&s->qdev, tag));
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} |
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static void scsi_req_set_status(SCSIRequest *req, int status, int sense_code) |
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{ |
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req->status = status; |
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scsi_dev_set_sense(req->dev, 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->req, status, sense); |
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scsi_req_complete(&r->req); |
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scsi_remove_request(r); |
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} |
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/* Cancel a pending data transfer. */
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static void scsi_cancel_io(SCSIDevice *d, uint32_t tag) |
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{ |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
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SCSIDiskReq *r; |
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DPRINTF("Cancel tag=0x%x\n", tag);
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r = scsi_find_request(s, tag); |
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if (r) {
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if (r->req.aiocb)
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bdrv_aio_cancel(r->req.aiocb); |
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r->req.aiocb = NULL;
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scsi_remove_request(r); |
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} |
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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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r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len); |
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} |
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static void scsi_read_request(SCSIDiskReq *r) |
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{ |
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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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r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, 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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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_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
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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(SCSIDevice *d, uint32_t tag) |
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{ |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
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SCSIDiskReq *r; |
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r = scsi_find_request(s, tag); |
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if (!r) {
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BADF("Bad read tag 0x%x\n", tag);
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/* ??? This is the wrong error. */
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scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
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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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scsi_read_request(r); |
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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(0);
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} else {
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if (type == SCSI_REQ_STATUS_RETRY_READ) {
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r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, 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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r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, len); |
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} |
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} |
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static void scsi_write_request(SCSIDiskReq *r) |
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{ |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
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uint32_t n; |
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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_command_complete(r, CHECK_CONDITION, |
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HARDWARE_ERROR); |
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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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} |
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} |
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/* Write data to a scsi device. Returns nonzero on failure.
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The transfer may complete asynchronously. */
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static int scsi_write_data(SCSIDevice *d, uint32_t tag) |
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{ |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
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SCSIDiskReq *r; |
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DPRINTF("Write data tag=0x%x\n", tag);
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r = scsi_find_request(s, tag); |
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if (!r) {
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BADF("Bad write tag 0x%x\n", tag);
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scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
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return 1; |
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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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scsi_write_request(r); |
302 |
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return 0; |
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} |
305 |
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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); |
317 |
if (r->status & SCSI_REQ_STATUS_RETRY) {
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int status = r->status;
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r->status &= |
320 |
~(SCSI_REQ_STATUS_RETRY | SCSI_REQ_STATUS_RETRY_TYPE_MASK); |
321 |
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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_request(r); |
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break;
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case SCSI_REQ_STATUS_RETRY_WRITE:
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scsi_write_request(r); |
328 |
break;
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} |
330 |
} |
331 |
} |
332 |
} |
333 |
|
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static void scsi_dma_restart_cb(void *opaque, int running, int reason) |
335 |
{ |
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SCSIDiskState *s = opaque; |
337 |
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338 |
if (!running)
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return;
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340 |
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341 |
if (!s->bh) {
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s->bh = qemu_bh_new(scsi_dma_restart_bh, s); |
343 |
qemu_bh_schedule(s->bh); |
344 |
} |
345 |
} |
346 |
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347 |
/* Return a pointer to the data buffer. */
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static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
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{ |
350 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
351 |
SCSIDiskReq *r; |
352 |
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353 |
r = scsi_find_request(s, tag); |
354 |
if (!r) {
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355 |
BADF("Bad buffer tag 0x%x\n", tag);
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return NULL; |
357 |
} |
358 |
return (uint8_t *)r->iov.iov_base;
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359 |
} |
360 |
|
361 |
static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf) |
362 |
{ |
363 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
364 |
int buflen = 0; |
365 |
|
366 |
if (req->cmd.buf[1] & 0x2) { |
367 |
/* Command support data - optional, not implemented */
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368 |
BADF("optional INQUIRY command support request not implemented\n");
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369 |
return -1; |
370 |
} |
371 |
|
372 |
if (req->cmd.buf[1] & 0x1) { |
373 |
/* Vital product data */
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374 |
uint8_t page_code = req->cmd.buf[2];
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375 |
if (req->cmd.xfer < 4) { |
376 |
BADF("Error: Inquiry (EVPD[%02X]) buffer size %zd is "
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377 |
"less than 4\n", page_code, req->cmd.xfer);
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378 |
return -1; |
379 |
} |
380 |
|
381 |
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
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382 |
outbuf[buflen++] = 5;
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383 |
} else {
|
384 |
outbuf[buflen++] = 0;
|
385 |
} |
386 |
outbuf[buflen++] = page_code ; // this page
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387 |
outbuf[buflen++] = 0x00;
|
388 |
|
389 |
switch (page_code) {
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390 |
case 0x00: /* Supported page codes, mandatory */ |
391 |
DPRINTF("Inquiry EVPD[Supported pages] "
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392 |
"buffer size %zd\n", req->cmd.xfer);
|
393 |
outbuf[buflen++] = 4; // number of pages |
394 |
outbuf[buflen++] = 0x00; // list of supported pages (this page) |
395 |
outbuf[buflen++] = 0x80; // unit serial number |
396 |
outbuf[buflen++] = 0x83; // device identification |
397 |
outbuf[buflen++] = 0xb0; // block device characteristics |
398 |
break;
|
399 |
|
400 |
case 0x80: /* Device serial number, optional */ |
401 |
{ |
402 |
int l = strlen(s->serial);
|
403 |
|
404 |
if (l > req->cmd.xfer)
|
405 |
l = req->cmd.xfer; |
406 |
if (l > 20) |
407 |
l = 20;
|
408 |
|
409 |
DPRINTF("Inquiry EVPD[Serial number] "
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410 |
"buffer size %zd\n", req->cmd.xfer);
|
411 |
outbuf[buflen++] = l; |
412 |
memcpy(outbuf+buflen, s->serial, l); |
413 |
buflen += l; |
414 |
break;
|
415 |
} |
416 |
|
417 |
case 0x83: /* Device identification page, mandatory */ |
418 |
{ |
419 |
int max_len = 255 - 8; |
420 |
int id_len = strlen(bdrv_get_device_name(s->bs));
|
421 |
|
422 |
if (id_len > max_len)
|
423 |
id_len = max_len; |
424 |
DPRINTF("Inquiry EVPD[Device identification] "
|
425 |
"buffer size %zd\n", req->cmd.xfer);
|
426 |
|
427 |
outbuf[buflen++] = 3 + id_len;
|
428 |
outbuf[buflen++] = 0x2; // ASCII |
429 |
outbuf[buflen++] = 0; // not officially assigned |
430 |
outbuf[buflen++] = 0; // reserved |
431 |
outbuf[buflen++] = id_len; // length of data following
|
432 |
|
433 |
memcpy(outbuf+buflen, bdrv_get_device_name(s->bs), id_len); |
434 |
buflen += id_len; |
435 |
break;
|
436 |
} |
437 |
case 0xb0: /* block device characteristics */ |
438 |
{ |
439 |
unsigned int min_io_size = |
440 |
s->qdev.conf.min_io_size / s->qdev.blocksize; |
441 |
unsigned int opt_io_size = |
442 |
s->qdev.conf.opt_io_size / s->qdev.blocksize; |
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 |
break;
|
459 |
} |
460 |
default:
|
461 |
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
|
462 |
"buffer size %zd\n", page_code, req->cmd.xfer);
|
463 |
return -1; |
464 |
} |
465 |
/* done with EVPD */
|
466 |
return buflen;
|
467 |
} |
468 |
|
469 |
/* Standard INQUIRY data */
|
470 |
if (req->cmd.buf[2] != 0) { |
471 |
BADF("Error: Inquiry (STANDARD) page or code "
|
472 |
"is non-zero [%02X]\n", req->cmd.buf[2]); |
473 |
return -1; |
474 |
} |
475 |
|
476 |
/* PAGE CODE == 0 */
|
477 |
if (req->cmd.xfer < 5) { |
478 |
BADF("Error: Inquiry (STANDARD) buffer size %zd "
|
479 |
"is less than 5\n", req->cmd.xfer);
|
480 |
return -1; |
481 |
} |
482 |
|
483 |
buflen = req->cmd.xfer; |
484 |
if (buflen > SCSI_MAX_INQUIRY_LEN)
|
485 |
buflen = SCSI_MAX_INQUIRY_LEN; |
486 |
|
487 |
memset(outbuf, 0, buflen);
|
488 |
|
489 |
if (req->lun || req->cmd.buf[1] >> 5) { |
490 |
outbuf[0] = 0x7f; /* LUN not supported */ |
491 |
return buflen;
|
492 |
} |
493 |
|
494 |
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
|
495 |
outbuf[0] = 5; |
496 |
outbuf[1] = 0x80; |
497 |
memcpy(&outbuf[16], "QEMU CD-ROM ", 16); |
498 |
} else {
|
499 |
outbuf[0] = 0; |
500 |
memcpy(&outbuf[16], "QEMU HARDDISK ", 16); |
501 |
} |
502 |
memcpy(&outbuf[8], "QEMU ", 8); |
503 |
memset(&outbuf[32], 0, 4); |
504 |
memcpy(&outbuf[32], s->version, MIN(4, strlen(s->version))); |
505 |
/*
|
506 |
* We claim conformance to SPC-3, which is required for guests
|
507 |
* to ask for modern features like READ CAPACITY(16) or the
|
508 |
* block characteristics VPD page by default. Not all of SPC-3
|
509 |
* is actually implemented, but we're good enough.
|
510 |
*/
|
511 |
outbuf[2] = 5; |
512 |
outbuf[3] = 2; /* Format 2 */ |
513 |
|
514 |
if (buflen > 36) { |
515 |
outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */ |
516 |
} else {
|
517 |
/* If the allocation length of CDB is too small,
|
518 |
the additional length is not adjusted */
|
519 |
outbuf[4] = 36 - 5; |
520 |
} |
521 |
|
522 |
/* Sync data transfer and TCQ. */
|
523 |
outbuf[7] = 0x10 | (req->bus->tcq ? 0x02 : 0); |
524 |
return buflen;
|
525 |
} |
526 |
|
527 |
static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p, |
528 |
int page_control)
|
529 |
{ |
530 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
531 |
BlockDriverState *bdrv = s->bs; |
532 |
int cylinders, heads, secs;
|
533 |
|
534 |
/*
|
535 |
* If Changeable Values are requested, a mask denoting those mode parameters
|
536 |
* that are changeable shall be returned. As we currently don't support
|
537 |
* parameter changes via MODE_SELECT all bits are returned set to zero.
|
538 |
* The buffer was already menset to zero by the caller of this function.
|
539 |
*/
|
540 |
switch (page) {
|
541 |
case 4: /* Rigid disk device geometry page. */ |
542 |
p[0] = 4; |
543 |
p[1] = 0x16; |
544 |
if (page_control == 1) { /* Changeable Values */ |
545 |
return p[1] + 2; |
546 |
} |
547 |
/* if a geometry hint is available, use it */
|
548 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
549 |
p[2] = (cylinders >> 16) & 0xff; |
550 |
p[3] = (cylinders >> 8) & 0xff; |
551 |
p[4] = cylinders & 0xff; |
552 |
p[5] = heads & 0xff; |
553 |
/* Write precomp start cylinder, disabled */
|
554 |
p[6] = (cylinders >> 16) & 0xff; |
555 |
p[7] = (cylinders >> 8) & 0xff; |
556 |
p[8] = cylinders & 0xff; |
557 |
/* Reduced current start cylinder, disabled */
|
558 |
p[9] = (cylinders >> 16) & 0xff; |
559 |
p[10] = (cylinders >> 8) & 0xff; |
560 |
p[11] = cylinders & 0xff; |
561 |
/* Device step rate [ns], 200ns */
|
562 |
p[12] = 0; |
563 |
p[13] = 200; |
564 |
/* Landing zone cylinder */
|
565 |
p[14] = 0xff; |
566 |
p[15] = 0xff; |
567 |
p[16] = 0xff; |
568 |
/* Medium rotation rate [rpm], 5400 rpm */
|
569 |
p[20] = (5400 >> 8) & 0xff; |
570 |
p[21] = 5400 & 0xff; |
571 |
return p[1] + 2; |
572 |
|
573 |
case 5: /* Flexible disk device geometry page. */ |
574 |
p[0] = 5; |
575 |
p[1] = 0x1e; |
576 |
if (page_control == 1) { /* Changeable Values */ |
577 |
return p[1] + 2; |
578 |
} |
579 |
/* Transfer rate [kbit/s], 5Mbit/s */
|
580 |
p[2] = 5000 >> 8; |
581 |
p[3] = 5000 & 0xff; |
582 |
/* if a geometry hint is available, use it */
|
583 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
584 |
p[4] = heads & 0xff; |
585 |
p[5] = secs & 0xff; |
586 |
p[6] = s->cluster_size * 2; |
587 |
p[8] = (cylinders >> 8) & 0xff; |
588 |
p[9] = cylinders & 0xff; |
589 |
/* Write precomp start cylinder, disabled */
|
590 |
p[10] = (cylinders >> 8) & 0xff; |
591 |
p[11] = cylinders & 0xff; |
592 |
/* Reduced current start cylinder, disabled */
|
593 |
p[12] = (cylinders >> 8) & 0xff; |
594 |
p[13] = cylinders & 0xff; |
595 |
/* Device step rate [100us], 100us */
|
596 |
p[14] = 0; |
597 |
p[15] = 1; |
598 |
/* Device step pulse width [us], 1us */
|
599 |
p[16] = 1; |
600 |
/* Device head settle delay [100us], 100us */
|
601 |
p[17] = 0; |
602 |
p[18] = 1; |
603 |
/* Motor on delay [0.1s], 0.1s */
|
604 |
p[19] = 1; |
605 |
/* Motor off delay [0.1s], 0.1s */
|
606 |
p[20] = 1; |
607 |
/* Medium rotation rate [rpm], 5400 rpm */
|
608 |
p[28] = (5400 >> 8) & 0xff; |
609 |
p[29] = 5400 & 0xff; |
610 |
return p[1] + 2; |
611 |
|
612 |
case 8: /* Caching page. */ |
613 |
p[0] = 8; |
614 |
p[1] = 0x12; |
615 |
if (page_control == 1) { /* Changeable Values */ |
616 |
return p[1] + 2; |
617 |
} |
618 |
if (bdrv_enable_write_cache(s->bs)) {
|
619 |
p[2] = 4; /* WCE */ |
620 |
} |
621 |
return p[1] + 2; |
622 |
|
623 |
case 0x2a: /* CD Capabilities and Mechanical Status page. */ |
624 |
if (bdrv_get_type_hint(bdrv) != BDRV_TYPE_CDROM)
|
625 |
return 0; |
626 |
p[0] = 0x2a; |
627 |
p[1] = 0x14; |
628 |
if (page_control == 1) { /* Changeable Values */ |
629 |
return p[1] + 2; |
630 |
} |
631 |
p[2] = 3; // CD-R & CD-RW read |
632 |
p[3] = 0; // Writing not supported |
633 |
p[4] = 0x7f; /* Audio, composite, digital out, |
634 |
mode 2 form 1&2, multi session */
|
635 |
p[5] = 0xff; /* CD DA, DA accurate, RW supported, |
636 |
RW corrected, C2 errors, ISRC,
|
637 |
UPC, Bar code */
|
638 |
p[6] = 0x2d | (bdrv_is_locked(s->bs)? 2 : 0); |
639 |
/* Locking supported, jumper present, eject, tray */
|
640 |
p[7] = 0; /* no volume & mute control, no |
641 |
changer */
|
642 |
p[8] = (50 * 176) >> 8; // 50x read speed |
643 |
p[9] = (50 * 176) & 0xff; |
644 |
p[10] = 0 >> 8; // No volume |
645 |
p[11] = 0 & 0xff; |
646 |
p[12] = 2048 >> 8; // 2M buffer |
647 |
p[13] = 2048 & 0xff; |
648 |
p[14] = (16 * 176) >> 8; // 16x read speed current |
649 |
p[15] = (16 * 176) & 0xff; |
650 |
p[18] = (16 * 176) >> 8; // 16x write speed |
651 |
p[19] = (16 * 176) & 0xff; |
652 |
p[20] = (16 * 176) >> 8; // 16x write speed current |
653 |
p[21] = (16 * 176) & 0xff; |
654 |
return p[1] + 2; |
655 |
|
656 |
default:
|
657 |
return 0; |
658 |
} |
659 |
} |
660 |
|
661 |
static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf) |
662 |
{ |
663 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
664 |
uint64_t nb_sectors; |
665 |
int page, dbd, buflen, page_control;
|
666 |
uint8_t *p; |
667 |
uint8_t dev_specific_param; |
668 |
|
669 |
dbd = req->cmd.buf[1] & 0x8; |
670 |
page = req->cmd.buf[2] & 0x3f; |
671 |
page_control = (req->cmd.buf[2] & 0xc0) >> 6; |
672 |
DPRINTF("Mode Sense(%d) (page %d, xfer %zd, page_control %d)\n",
|
673 |
(req->cmd.buf[0] == MODE_SENSE) ? 6 : 10, page, req->cmd.xfer, page_control); |
674 |
memset(outbuf, 0, req->cmd.xfer);
|
675 |
p = outbuf; |
676 |
|
677 |
if (bdrv_is_read_only(s->bs)) {
|
678 |
dev_specific_param = 0x80; /* Readonly. */ |
679 |
} else {
|
680 |
dev_specific_param = 0x00;
|
681 |
} |
682 |
|
683 |
if (req->cmd.buf[0] == MODE_SENSE) { |
684 |
p[1] = 0; /* Default media type. */ |
685 |
p[2] = dev_specific_param;
|
686 |
p[3] = 0; /* Block descriptor length. */ |
687 |
p += 4;
|
688 |
} else { /* MODE_SENSE_10 */ |
689 |
p[2] = 0; /* Default media type. */ |
690 |
p[3] = dev_specific_param;
|
691 |
p[6] = p[7] = 0; /* Block descriptor length. */ |
692 |
p += 8;
|
693 |
} |
694 |
|
695 |
bdrv_get_geometry(s->bs, &nb_sectors); |
696 |
if (!dbd && nb_sectors) {
|
697 |
if (req->cmd.buf[0] == MODE_SENSE) { |
698 |
outbuf[3] = 8; /* Block descriptor length */ |
699 |
} else { /* MODE_SENSE_10 */ |
700 |
outbuf[7] = 8; /* Block descriptor length */ |
701 |
} |
702 |
nb_sectors /= s->cluster_size; |
703 |
if (nb_sectors > 0xffffff) |
704 |
nb_sectors = 0;
|
705 |
p[0] = 0; /* media density code */ |
706 |
p[1] = (nb_sectors >> 16) & 0xff; |
707 |
p[2] = (nb_sectors >> 8) & 0xff; |
708 |
p[3] = nb_sectors & 0xff; |
709 |
p[4] = 0; /* reserved */ |
710 |
p[5] = 0; /* bytes 5-7 are the sector size in bytes */ |
711 |
p[6] = s->cluster_size * 2; |
712 |
p[7] = 0; |
713 |
p += 8;
|
714 |
} |
715 |
|
716 |
if (page_control == 3) { /* Saved Values */ |
717 |
return -1; /* ILLEGAL_REQUEST */ |
718 |
} |
719 |
|
720 |
switch (page) {
|
721 |
case 0x04: |
722 |
case 0x05: |
723 |
case 0x08: |
724 |
case 0x2a: |
725 |
p += mode_sense_page(req, page, p, page_control); |
726 |
break;
|
727 |
case 0x3f: |
728 |
p += mode_sense_page(req, 0x08, p, page_control);
|
729 |
p += mode_sense_page(req, 0x2a, p, page_control);
|
730 |
break;
|
731 |
default:
|
732 |
return -1; /* ILLEGAL_REQUEST */ |
733 |
} |
734 |
|
735 |
buflen = p - outbuf; |
736 |
/*
|
737 |
* The mode data length field specifies the length in bytes of the
|
738 |
* following data that is available to be transferred. The mode data
|
739 |
* length does not include itself.
|
740 |
*/
|
741 |
if (req->cmd.buf[0] == MODE_SENSE) { |
742 |
outbuf[0] = buflen - 1; |
743 |
} else { /* MODE_SENSE_10 */ |
744 |
outbuf[0] = ((buflen - 2) >> 8) & 0xff; |
745 |
outbuf[1] = (buflen - 2) & 0xff; |
746 |
} |
747 |
if (buflen > req->cmd.xfer)
|
748 |
buflen = req->cmd.xfer; |
749 |
return buflen;
|
750 |
} |
751 |
|
752 |
static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf) |
753 |
{ |
754 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
755 |
int start_track, format, msf, toclen;
|
756 |
uint64_t nb_sectors; |
757 |
|
758 |
msf = req->cmd.buf[1] & 2; |
759 |
format = req->cmd.buf[2] & 0xf; |
760 |
start_track = req->cmd.buf[6];
|
761 |
bdrv_get_geometry(s->bs, &nb_sectors); |
762 |
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
763 |
nb_sectors /= s->cluster_size; |
764 |
switch (format) {
|
765 |
case 0: |
766 |
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); |
767 |
break;
|
768 |
case 1: |
769 |
/* multi session : only a single session defined */
|
770 |
toclen = 12;
|
771 |
memset(outbuf, 0, 12); |
772 |
outbuf[1] = 0x0a; |
773 |
outbuf[2] = 0x01; |
774 |
outbuf[3] = 0x01; |
775 |
break;
|
776 |
case 2: |
777 |
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); |
778 |
break;
|
779 |
default:
|
780 |
return -1; |
781 |
} |
782 |
if (toclen > req->cmd.xfer)
|
783 |
toclen = req->cmd.xfer; |
784 |
return toclen;
|
785 |
} |
786 |
|
787 |
static int scsi_disk_emulate_command(SCSIDiskReq *r, uint8_t *outbuf) |
788 |
{ |
789 |
SCSIRequest *req = &r->req; |
790 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
791 |
uint64_t nb_sectors; |
792 |
int buflen = 0; |
793 |
|
794 |
switch (req->cmd.buf[0]) { |
795 |
case TEST_UNIT_READY:
|
796 |
if (!bdrv_is_inserted(s->bs))
|
797 |
goto not_ready;
|
798 |
break;
|
799 |
case REQUEST_SENSE:
|
800 |
if (req->cmd.xfer < 4) |
801 |
goto illegal_request;
|
802 |
memset(outbuf, 0, 4); |
803 |
buflen = 4;
|
804 |
if (req->dev->sense.key == NOT_READY && req->cmd.xfer >= 18) { |
805 |
memset(outbuf, 0, 18); |
806 |
buflen = 18;
|
807 |
outbuf[7] = 10; |
808 |
/* asc 0x3a, ascq 0: Medium not present */
|
809 |
outbuf[12] = 0x3a; |
810 |
outbuf[13] = 0; |
811 |
} |
812 |
outbuf[0] = 0xf0; |
813 |
outbuf[1] = 0; |
814 |
outbuf[2] = req->dev->sense.key;
|
815 |
scsi_dev_clear_sense(req->dev); |
816 |
break;
|
817 |
case INQUIRY:
|
818 |
buflen = scsi_disk_emulate_inquiry(req, outbuf); |
819 |
if (buflen < 0) |
820 |
goto illegal_request;
|
821 |
break;
|
822 |
case MODE_SENSE:
|
823 |
case MODE_SENSE_10:
|
824 |
buflen = scsi_disk_emulate_mode_sense(req, outbuf); |
825 |
if (buflen < 0) |
826 |
goto illegal_request;
|
827 |
break;
|
828 |
case READ_TOC:
|
829 |
buflen = scsi_disk_emulate_read_toc(req, outbuf); |
830 |
if (buflen < 0) |
831 |
goto illegal_request;
|
832 |
break;
|
833 |
case RESERVE:
|
834 |
if (req->cmd.buf[1] & 1) |
835 |
goto illegal_request;
|
836 |
break;
|
837 |
case RESERVE_10:
|
838 |
if (req->cmd.buf[1] & 3) |
839 |
goto illegal_request;
|
840 |
break;
|
841 |
case RELEASE:
|
842 |
if (req->cmd.buf[1] & 1) |
843 |
goto illegal_request;
|
844 |
break;
|
845 |
case RELEASE_10:
|
846 |
if (req->cmd.buf[1] & 3) |
847 |
goto illegal_request;
|
848 |
break;
|
849 |
case START_STOP:
|
850 |
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM && (req->cmd.buf[4] & 2)) { |
851 |
/* load/eject medium */
|
852 |
bdrv_eject(s->bs, !(req->cmd.buf[4] & 1)); |
853 |
} |
854 |
break;
|
855 |
case ALLOW_MEDIUM_REMOVAL:
|
856 |
bdrv_set_locked(s->bs, req->cmd.buf[4] & 1); |
857 |
break;
|
858 |
case READ_CAPACITY:
|
859 |
/* The normal LEN field for this command is zero. */
|
860 |
memset(outbuf, 0, 8); |
861 |
bdrv_get_geometry(s->bs, &nb_sectors); |
862 |
if (!nb_sectors)
|
863 |
goto not_ready;
|
864 |
nb_sectors /= s->cluster_size; |
865 |
/* Returned value is the address of the last sector. */
|
866 |
nb_sectors--; |
867 |
/* Remember the new size for read/write sanity checking. */
|
868 |
s->max_lba = nb_sectors; |
869 |
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
|
870 |
if (nb_sectors > UINT32_MAX)
|
871 |
nb_sectors = UINT32_MAX; |
872 |
outbuf[0] = (nb_sectors >> 24) & 0xff; |
873 |
outbuf[1] = (nb_sectors >> 16) & 0xff; |
874 |
outbuf[2] = (nb_sectors >> 8) & 0xff; |
875 |
outbuf[3] = nb_sectors & 0xff; |
876 |
outbuf[4] = 0; |
877 |
outbuf[5] = 0; |
878 |
outbuf[6] = s->cluster_size * 2; |
879 |
outbuf[7] = 0; |
880 |
buflen = 8;
|
881 |
break;
|
882 |
case SYNCHRONIZE_CACHE:
|
883 |
bdrv_flush(s->bs); |
884 |
break;
|
885 |
case GET_CONFIGURATION:
|
886 |
memset(outbuf, 0, 8); |
887 |
/* ??? This should probably return much more information. For now
|
888 |
just return the basic header indicating the CD-ROM profile. */
|
889 |
outbuf[7] = 8; // CD-ROM |
890 |
buflen = 8;
|
891 |
break;
|
892 |
case SERVICE_ACTION_IN:
|
893 |
/* Service Action In subcommands. */
|
894 |
if ((req->cmd.buf[1] & 31) == 0x10) { |
895 |
DPRINTF("SAI READ CAPACITY(16)\n");
|
896 |
memset(outbuf, 0, req->cmd.xfer);
|
897 |
bdrv_get_geometry(s->bs, &nb_sectors); |
898 |
if (!nb_sectors)
|
899 |
goto not_ready;
|
900 |
nb_sectors /= s->cluster_size; |
901 |
/* Returned value is the address of the last sector. */
|
902 |
nb_sectors--; |
903 |
/* Remember the new size for read/write sanity checking. */
|
904 |
s->max_lba = nb_sectors; |
905 |
outbuf[0] = (nb_sectors >> 56) & 0xff; |
906 |
outbuf[1] = (nb_sectors >> 48) & 0xff; |
907 |
outbuf[2] = (nb_sectors >> 40) & 0xff; |
908 |
outbuf[3] = (nb_sectors >> 32) & 0xff; |
909 |
outbuf[4] = (nb_sectors >> 24) & 0xff; |
910 |
outbuf[5] = (nb_sectors >> 16) & 0xff; |
911 |
outbuf[6] = (nb_sectors >> 8) & 0xff; |
912 |
outbuf[7] = nb_sectors & 0xff; |
913 |
outbuf[8] = 0; |
914 |
outbuf[9] = 0; |
915 |
outbuf[10] = s->cluster_size * 2; |
916 |
outbuf[11] = 0; |
917 |
outbuf[12] = 0; |
918 |
outbuf[13] = get_physical_block_exp(&s->qdev.conf);
|
919 |
/* Protection, exponent and lowest lba field left blank. */
|
920 |
buflen = req->cmd.xfer; |
921 |
break;
|
922 |
} |
923 |
DPRINTF("Unsupported Service Action In\n");
|
924 |
goto illegal_request;
|
925 |
case REPORT_LUNS:
|
926 |
if (req->cmd.xfer < 16) |
927 |
goto illegal_request;
|
928 |
memset(outbuf, 0, 16); |
929 |
outbuf[3] = 8; |
930 |
buflen = 16;
|
931 |
break;
|
932 |
case VERIFY:
|
933 |
break;
|
934 |
case REZERO_UNIT:
|
935 |
DPRINTF("Rezero Unit\n");
|
936 |
if (!bdrv_is_inserted(s->bs)) {
|
937 |
goto not_ready;
|
938 |
} |
939 |
break;
|
940 |
default:
|
941 |
goto illegal_request;
|
942 |
} |
943 |
scsi_req_set_status(req, GOOD, NO_SENSE); |
944 |
return buflen;
|
945 |
|
946 |
not_ready:
|
947 |
scsi_command_complete(r, CHECK_CONDITION, NOT_READY); |
948 |
return -1; |
949 |
|
950 |
illegal_request:
|
951 |
scsi_command_complete(r, CHECK_CONDITION, ILLEGAL_REQUEST); |
952 |
return -1; |
953 |
} |
954 |
|
955 |
/* Execute a scsi command. Returns the length of the data expected by the
|
956 |
command. This will be Positive for data transfers from the device
|
957 |
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
958 |
and zero if the command does not transfer any data. */
|
959 |
|
960 |
static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
|
961 |
uint8_t *buf, int lun)
|
962 |
{ |
963 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
964 |
uint64_t lba; |
965 |
uint32_t len; |
966 |
int cmdlen;
|
967 |
int is_write;
|
968 |
uint8_t command; |
969 |
uint8_t *outbuf; |
970 |
SCSIDiskReq *r; |
971 |
int rc;
|
972 |
|
973 |
command = buf[0];
|
974 |
r = scsi_find_request(s, tag); |
975 |
if (r) {
|
976 |
BADF("Tag 0x%x already in use\n", tag);
|
977 |
scsi_cancel_io(d, tag); |
978 |
} |
979 |
/* ??? Tags are not unique for different luns. We only implement a
|
980 |
single lun, so this should not matter. */
|
981 |
r = scsi_new_request(s, tag, lun); |
982 |
outbuf = (uint8_t *)r->iov.iov_base; |
983 |
is_write = 0;
|
984 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]); |
985 |
switch (command >> 5) { |
986 |
case 0: |
987 |
lba = (uint64_t) buf[3] | ((uint64_t) buf[2] << 8) | |
988 |
(((uint64_t) buf[1] & 0x1f) << 16); |
989 |
len = buf[4];
|
990 |
cmdlen = 6;
|
991 |
break;
|
992 |
case 1: |
993 |
case 2: |
994 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
995 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
996 |
len = buf[8] | (buf[7] << 8); |
997 |
cmdlen = 10;
|
998 |
break;
|
999 |
case 4: |
1000 |
lba = (uint64_t) buf[9] | ((uint64_t) buf[8] << 8) | |
1001 |
((uint64_t) buf[7] << 16) | ((uint64_t) buf[6] << 24) | |
1002 |
((uint64_t) buf[5] << 32) | ((uint64_t) buf[4] << 40) | |
1003 |
((uint64_t) buf[3] << 48) | ((uint64_t) buf[2] << 56); |
1004 |
len = buf[13] | (buf[12] << 8) | (buf[11] << 16) | (buf[10] << 24); |
1005 |
cmdlen = 16;
|
1006 |
break;
|
1007 |
case 5: |
1008 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
1009 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
1010 |
len = buf[9] | (buf[8] << 8) | (buf[7] << 16) | (buf[6] << 24); |
1011 |
cmdlen = 12;
|
1012 |
break;
|
1013 |
default:
|
1014 |
BADF("Unsupported command length, command %x\n", command);
|
1015 |
goto fail;
|
1016 |
} |
1017 |
#ifdef DEBUG_SCSI
|
1018 |
{ |
1019 |
int i;
|
1020 |
for (i = 1; i < cmdlen; i++) { |
1021 |
printf(" 0x%02x", buf[i]);
|
1022 |
} |
1023 |
printf("\n");
|
1024 |
} |
1025 |
#endif
|
1026 |
|
1027 |
if (scsi_req_parse(&r->req, buf) != 0) { |
1028 |
BADF("Unsupported command length, command %x\n", command);
|
1029 |
goto fail;
|
1030 |
} |
1031 |
assert(r->req.cmd.len == cmdlen); |
1032 |
assert(r->req.cmd.lba == lba); |
1033 |
|
1034 |
if (lun || buf[1] >> 5) { |
1035 |
/* Only LUN 0 supported. */
|
1036 |
DPRINTF("Unimplemented LUN %d\n", lun ? lun : buf[1] >> 5); |
1037 |
if (command != REQUEST_SENSE && command != INQUIRY)
|
1038 |
goto fail;
|
1039 |
} |
1040 |
switch (command) {
|
1041 |
case TEST_UNIT_READY:
|
1042 |
case REQUEST_SENSE:
|
1043 |
case INQUIRY:
|
1044 |
case MODE_SENSE:
|
1045 |
case MODE_SENSE_10:
|
1046 |
case RESERVE:
|
1047 |
case RESERVE_10:
|
1048 |
case RELEASE:
|
1049 |
case RELEASE_10:
|
1050 |
case START_STOP:
|
1051 |
case ALLOW_MEDIUM_REMOVAL:
|
1052 |
case READ_CAPACITY:
|
1053 |
case SYNCHRONIZE_CACHE:
|
1054 |
case READ_TOC:
|
1055 |
case GET_CONFIGURATION:
|
1056 |
case SERVICE_ACTION_IN:
|
1057 |
case REPORT_LUNS:
|
1058 |
case VERIFY:
|
1059 |
case REZERO_UNIT:
|
1060 |
rc = scsi_disk_emulate_command(r, outbuf); |
1061 |
if (rc < 0) { |
1062 |
return 0; |
1063 |
} |
1064 |
|
1065 |
r->iov.iov_len = rc; |
1066 |
break;
|
1067 |
case READ_6:
|
1068 |
case READ_10:
|
1069 |
case READ_12:
|
1070 |
case READ_16:
|
1071 |
DPRINTF("Read (sector %" PRId64 ", count %d)\n", lba, len); |
1072 |
if (lba > s->max_lba)
|
1073 |
goto illegal_lba;
|
1074 |
r->sector = lba * s->cluster_size; |
1075 |
r->sector_count = len * s->cluster_size; |
1076 |
break;
|
1077 |
case WRITE_6:
|
1078 |
case WRITE_10:
|
1079 |
case WRITE_12:
|
1080 |
case WRITE_16:
|
1081 |
case WRITE_VERIFY:
|
1082 |
case WRITE_VERIFY_12:
|
1083 |
case WRITE_VERIFY_16:
|
1084 |
DPRINTF("Write %s(sector %" PRId64 ", count %d)\n", |
1085 |
(command & 0xe) == 0xe ? "And Verify " : "", lba, len); |
1086 |
if (lba > s->max_lba)
|
1087 |
goto illegal_lba;
|
1088 |
r->sector = lba * s->cluster_size; |
1089 |
r->sector_count = len * s->cluster_size; |
1090 |
is_write = 1;
|
1091 |
break;
|
1092 |
case MODE_SELECT:
|
1093 |
DPRINTF("Mode Select(6) (len %d)\n", len);
|
1094 |
/* We don't support mode parameter changes.
|
1095 |
Allow the mode parameter header + block descriptors only. */
|
1096 |
if (len > 12) { |
1097 |
goto fail;
|
1098 |
} |
1099 |
break;
|
1100 |
case MODE_SELECT_10:
|
1101 |
DPRINTF("Mode Select(10) (len %d)\n", len);
|
1102 |
/* We don't support mode parameter changes.
|
1103 |
Allow the mode parameter header + block descriptors only. */
|
1104 |
if (len > 16) { |
1105 |
goto fail;
|
1106 |
} |
1107 |
break;
|
1108 |
case SEEK_6:
|
1109 |
case SEEK_10:
|
1110 |
DPRINTF("Seek(%d) (sector %" PRId64 ")\n", command == SEEK_6 ? 6 : 10, lba); |
1111 |
if (lba > s->max_lba) {
|
1112 |
goto illegal_lba;
|
1113 |
} |
1114 |
break;
|
1115 |
default:
|
1116 |
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
1117 |
fail:
|
1118 |
scsi_command_complete(r, CHECK_CONDITION, ILLEGAL_REQUEST); |
1119 |
return 0; |
1120 |
illegal_lba:
|
1121 |
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
1122 |
return 0; |
1123 |
} |
1124 |
if (r->sector_count == 0 && r->iov.iov_len == 0) { |
1125 |
scsi_command_complete(r, GOOD, NO_SENSE); |
1126 |
} |
1127 |
len = r->sector_count * 512 + r->iov.iov_len;
|
1128 |
if (is_write) {
|
1129 |
return -len;
|
1130 |
} else {
|
1131 |
if (!r->sector_count)
|
1132 |
r->sector_count = -1;
|
1133 |
return len;
|
1134 |
} |
1135 |
} |
1136 |
|
1137 |
static void scsi_disk_purge_requests(SCSIDiskState *s) |
1138 |
{ |
1139 |
SCSIDiskReq *r; |
1140 |
|
1141 |
while (!QTAILQ_EMPTY(&s->qdev.requests)) {
|
1142 |
r = DO_UPCAST(SCSIDiskReq, req, QTAILQ_FIRST(&s->qdev.requests)); |
1143 |
if (r->req.aiocb) {
|
1144 |
bdrv_aio_cancel(r->req.aiocb); |
1145 |
} |
1146 |
scsi_remove_request(r); |
1147 |
} |
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_disk_purge_requests(s); |
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_disk_purge_requests(s); |
1170 |
blockdev_mark_auto_del(s->qdev.conf.bs); |
1171 |
} |
1172 |
|
1173 |
static int scsi_disk_initfn(SCSIDevice *dev) |
1174 |
{ |
1175 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
1176 |
int is_cd;
|
1177 |
DriveInfo *dinfo; |
1178 |
|
1179 |
if (!s->qdev.conf.bs) {
|
1180 |
error_report("scsi-disk: drive property not set");
|
1181 |
return -1; |
1182 |
} |
1183 |
s->bs = s->qdev.conf.bs; |
1184 |
is_cd = bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM; |
1185 |
|
1186 |
if (!is_cd && !bdrv_is_inserted(s->bs)) {
|
1187 |
error_report("Device needs media, but drive is empty");
|
1188 |
return -1; |
1189 |
} |
1190 |
|
1191 |
if (!s->serial) {
|
1192 |
/* try to fall back to value set with legacy -drive serial=... */
|
1193 |
dinfo = drive_get_by_blockdev(s->bs); |
1194 |
s->serial = qemu_strdup(*dinfo->serial ? dinfo->serial : "0");
|
1195 |
} |
1196 |
|
1197 |
if (!s->version) {
|
1198 |
s->version = qemu_strdup(QEMU_VERSION); |
1199 |
} |
1200 |
|
1201 |
if (bdrv_is_sg(s->bs)) {
|
1202 |
error_report("scsi-disk: unwanted /dev/sg*");
|
1203 |
return -1; |
1204 |
} |
1205 |
|
1206 |
if (is_cd) {
|
1207 |
s->qdev.blocksize = 2048;
|
1208 |
} else {
|
1209 |
s->qdev.blocksize = s->qdev.conf.logical_block_size; |
1210 |
} |
1211 |
s->cluster_size = s->qdev.blocksize / 512;
|
1212 |
s->bs->buffer_alignment = s->qdev.blocksize; |
1213 |
|
1214 |
s->qdev.type = TYPE_DISK; |
1215 |
qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s); |
1216 |
bdrv_set_removable(s->bs, is_cd); |
1217 |
return 0; |
1218 |
} |
1219 |
|
1220 |
static SCSIDeviceInfo scsi_disk_info = {
|
1221 |
.qdev.name = "scsi-disk",
|
1222 |
.qdev.desc = "virtual scsi disk or cdrom",
|
1223 |
.qdev.size = sizeof(SCSIDiskState),
|
1224 |
.qdev.reset = scsi_disk_reset, |
1225 |
.init = scsi_disk_initfn, |
1226 |
.destroy = scsi_destroy, |
1227 |
.send_command = scsi_send_command, |
1228 |
.read_data = scsi_read_data, |
1229 |
.write_data = scsi_write_data, |
1230 |
.cancel_io = scsi_cancel_io, |
1231 |
.get_buf = scsi_get_buf, |
1232 |
.qdev.props = (Property[]) { |
1233 |
DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf), |
1234 |
DEFINE_PROP_STRING("ver", SCSIDiskState, version),
|
1235 |
DEFINE_PROP_STRING("serial", SCSIDiskState, serial),
|
1236 |
DEFINE_PROP_END_OF_LIST(), |
1237 |
}, |
1238 |
}; |
1239 |
|
1240 |
static void scsi_disk_register_devices(void) |
1241 |
{ |
1242 |
scsi_qdev_register(&scsi_disk_info); |
1243 |
} |
1244 |
device_init(scsi_disk_register_devices) |