root / hw / scsi-disk.c @ abd7f68d
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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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#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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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 SCSIDiskReq *scsi_new_request(SCSIDevice *d, uint32_t tag, 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), d, tag, lun);
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r = DO_UPCAST(SCSIDiskReq, req, req); |
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r->iov.iov_base = qemu_memalign(512, 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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r->req.aiocb = NULL;
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if (ret) {
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DPRINTF("IO error\n");
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r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, 0);
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scsi_command_complete(r, CHECK_CONDITION, NO_SENSE); |
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return;
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} |
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DPRINTF("Data ready tag=0x%x len=%" PRId64 "\n", r->req.tag, r->iov.iov_len); |
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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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/* 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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uint32_t n; |
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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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if (r->sector_count == (uint32_t)-1) { |
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DPRINTF("Read buf_len=%" PRId64 "\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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r->sector += n; |
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r->sector_count -= n; |
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} |
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static int scsi_handle_write_error(SCSIDiskReq *r, int error) |
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{ |
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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, 0);
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if (action == BLOCK_ERR_IGNORE) {
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bdrv_mon_event(s->bs, BDRV_ACTION_IGNORE, 0);
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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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r->status |= SCSI_REQ_STATUS_RETRY; |
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bdrv_mon_event(s->bs, BDRV_ACTION_STOP, 0);
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vm_stop(0);
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} else {
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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, 0);
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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_write_error(r, -ret))
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return;
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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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if (r->req.aiocb)
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BADF("Data transfer already in progress\n");
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scsi_write_request(r); |
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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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r->status &= ~SCSI_REQ_STATUS_RETRY; |
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scsi_write_request(r); |
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} |
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} |
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} |
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static void scsi_dma_restart_cb(void *opaque, int running, int reason) |
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{ |
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SCSIDiskState *s = opaque; |
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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); |
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qemu_bh_schedule(s->bh); |
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} |
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} |
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/* 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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{ |
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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 buffer tag 0x%x\n", tag);
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return NULL; |
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} |
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return (uint8_t *)r->iov.iov_base;
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} |
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static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf) |
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{ |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
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int buflen = 0; |
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if (req->cmd.buf[1] & 0x2) { |
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/* Command support data - optional, not implemented */
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BADF("optional INQUIRY command support request not implemented\n");
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return -1; |
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} |
332 |
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if (req->cmd.buf[1] & 0x1) { |
334 |
/* Vital product data */
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uint8_t page_code = req->cmd.buf[2];
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if (req->cmd.xfer < 4) { |
337 |
BADF("Error: Inquiry (EVPD[%02X]) buffer size %zd is "
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"less than 4\n", page_code, req->cmd.xfer);
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return -1; |
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} |
341 |
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if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
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outbuf[buflen++] = 5;
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} else {
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outbuf[buflen++] = 0;
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} |
347 |
outbuf[buflen++] = page_code ; // this page
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outbuf[buflen++] = 0x00;
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349 |
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350 |
switch (page_code) {
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case 0x00: /* Supported page codes, mandatory */ |
352 |
DPRINTF("Inquiry EVPD[Supported pages] "
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"buffer size %zd\n", req->cmd.xfer);
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outbuf[buflen++] = 4; // number of pages |
355 |
outbuf[buflen++] = 0x00; // list of supported pages (this page) |
356 |
outbuf[buflen++] = 0x80; // unit serial number |
357 |
outbuf[buflen++] = 0x83; // device identification |
358 |
outbuf[buflen++] = 0xb0; // block device characteristics |
359 |
break;
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360 |
|
361 |
case 0x80: /* Device serial number, optional */ |
362 |
{ |
363 |
int l = strlen(s->serial);
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364 |
|
365 |
if (l > req->cmd.xfer)
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366 |
l = req->cmd.xfer; |
367 |
if (l > 20) |
368 |
l = 20;
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369 |
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370 |
DPRINTF("Inquiry EVPD[Serial number] "
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"buffer size %zd\n", req->cmd.xfer);
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372 |
outbuf[buflen++] = l; |
373 |
memcpy(outbuf+buflen, s->serial, l); |
374 |
buflen += l; |
375 |
break;
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} |
377 |
|
378 |
case 0x83: /* Device identification page, mandatory */ |
379 |
{ |
380 |
int max_len = 255 - 8; |
381 |
int id_len = strlen(bdrv_get_device_name(s->bs));
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382 |
|
383 |
if (id_len > max_len)
|
384 |
id_len = max_len; |
385 |
DPRINTF("Inquiry EVPD[Device identification] "
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386 |
"buffer size %zd\n", req->cmd.xfer);
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387 |
|
388 |
outbuf[buflen++] = 3 + id_len;
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389 |
outbuf[buflen++] = 0x2; // ASCII |
390 |
outbuf[buflen++] = 0; // not officially assigned |
391 |
outbuf[buflen++] = 0; // reserved |
392 |
outbuf[buflen++] = id_len; // length of data following
|
393 |
|
394 |
memcpy(outbuf+buflen, bdrv_get_device_name(s->bs), id_len); |
395 |
buflen += id_len; |
396 |
break;
|
397 |
} |
398 |
case 0xb0: /* block device characteristics */ |
399 |
{ |
400 |
unsigned int min_io_size = |
401 |
s->qdev.conf.min_io_size / s->qdev.blocksize; |
402 |
unsigned int opt_io_size = |
403 |
s->qdev.conf.opt_io_size / s->qdev.blocksize; |
404 |
|
405 |
/* required VPD size with unmap support */
|
406 |
outbuf[3] = buflen = 0x3c; |
407 |
|
408 |
memset(outbuf + 4, 0, buflen - 4); |
409 |
|
410 |
/* optimal transfer length granularity */
|
411 |
outbuf[6] = (min_io_size >> 8) & 0xff; |
412 |
outbuf[7] = min_io_size & 0xff; |
413 |
|
414 |
/* optimal transfer length */
|
415 |
outbuf[12] = (opt_io_size >> 24) & 0xff; |
416 |
outbuf[13] = (opt_io_size >> 16) & 0xff; |
417 |
outbuf[14] = (opt_io_size >> 8) & 0xff; |
418 |
outbuf[15] = opt_io_size & 0xff; |
419 |
break;
|
420 |
} |
421 |
default:
|
422 |
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
|
423 |
"buffer size %zd\n", page_code, req->cmd.xfer);
|
424 |
return -1; |
425 |
} |
426 |
/* done with EVPD */
|
427 |
return buflen;
|
428 |
} |
429 |
|
430 |
/* Standard INQUIRY data */
|
431 |
if (req->cmd.buf[2] != 0) { |
432 |
BADF("Error: Inquiry (STANDARD) page or code "
|
433 |
"is non-zero [%02X]\n", req->cmd.buf[2]); |
434 |
return -1; |
435 |
} |
436 |
|
437 |
/* PAGE CODE == 0 */
|
438 |
if (req->cmd.xfer < 5) { |
439 |
BADF("Error: Inquiry (STANDARD) buffer size %zd "
|
440 |
"is less than 5\n", req->cmd.xfer);
|
441 |
return -1; |
442 |
} |
443 |
|
444 |
buflen = req->cmd.xfer; |
445 |
if (buflen > SCSI_MAX_INQUIRY_LEN)
|
446 |
buflen = SCSI_MAX_INQUIRY_LEN; |
447 |
|
448 |
memset(outbuf, 0, buflen);
|
449 |
|
450 |
if (req->lun || req->cmd.buf[1] >> 5) { |
451 |
outbuf[0] = 0x7f; /* LUN not supported */ |
452 |
return buflen;
|
453 |
} |
454 |
|
455 |
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
|
456 |
outbuf[0] = 5; |
457 |
outbuf[1] = 0x80; |
458 |
memcpy(&outbuf[16], "QEMU CD-ROM ", 16); |
459 |
} else {
|
460 |
outbuf[0] = 0; |
461 |
memcpy(&outbuf[16], "QEMU HARDDISK ", 16); |
462 |
} |
463 |
memcpy(&outbuf[8], "QEMU ", 8); |
464 |
memset(&outbuf[32], 0, 4); |
465 |
memcpy(&outbuf[32], s->version, MIN(4, strlen(s->version))); |
466 |
/*
|
467 |
* We claim conformance to SPC-3, which is required for guests
|
468 |
* to ask for modern features like READ CAPACITY(16) or the
|
469 |
* block characteristics VPD page by default. Not all of SPC-3
|
470 |
* is actually implemented, but we're good enough.
|
471 |
*/
|
472 |
outbuf[2] = 5; |
473 |
outbuf[3] = 2; /* Format 2 */ |
474 |
|
475 |
if (buflen > 36) { |
476 |
outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */ |
477 |
} else {
|
478 |
/* If the allocation length of CDB is too small,
|
479 |
the additional length is not adjusted */
|
480 |
outbuf[4] = 36 - 5; |
481 |
} |
482 |
|
483 |
/* Sync data transfer and TCQ. */
|
484 |
outbuf[7] = 0x10 | (req->bus->tcq ? 0x02 : 0); |
485 |
return buflen;
|
486 |
} |
487 |
|
488 |
static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p) |
489 |
{ |
490 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
491 |
BlockDriverState *bdrv = s->bs; |
492 |
int cylinders, heads, secs;
|
493 |
|
494 |
switch (page) {
|
495 |
case 4: /* Rigid disk device geometry page. */ |
496 |
p[0] = 4; |
497 |
p[1] = 0x16; |
498 |
/* if a geometry hint is available, use it */
|
499 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
500 |
p[2] = (cylinders >> 16) & 0xff; |
501 |
p[3] = (cylinders >> 8) & 0xff; |
502 |
p[4] = cylinders & 0xff; |
503 |
p[5] = heads & 0xff; |
504 |
/* Write precomp start cylinder, disabled */
|
505 |
p[6] = (cylinders >> 16) & 0xff; |
506 |
p[7] = (cylinders >> 8) & 0xff; |
507 |
p[8] = cylinders & 0xff; |
508 |
/* Reduced current start cylinder, disabled */
|
509 |
p[9] = (cylinders >> 16) & 0xff; |
510 |
p[10] = (cylinders >> 8) & 0xff; |
511 |
p[11] = cylinders & 0xff; |
512 |
/* Device step rate [ns], 200ns */
|
513 |
p[12] = 0; |
514 |
p[13] = 200; |
515 |
/* Landing zone cylinder */
|
516 |
p[14] = 0xff; |
517 |
p[15] = 0xff; |
518 |
p[16] = 0xff; |
519 |
/* Medium rotation rate [rpm], 5400 rpm */
|
520 |
p[20] = (5400 >> 8) & 0xff; |
521 |
p[21] = 5400 & 0xff; |
522 |
return 0x16; |
523 |
|
524 |
case 5: /* Flexible disk device geometry page. */ |
525 |
p[0] = 5; |
526 |
p[1] = 0x1e; |
527 |
/* Transfer rate [kbit/s], 5Mbit/s */
|
528 |
p[2] = 5000 >> 8; |
529 |
p[3] = 5000 & 0xff; |
530 |
/* if a geometry hint is available, use it */
|
531 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
532 |
p[4] = heads & 0xff; |
533 |
p[5] = secs & 0xff; |
534 |
p[6] = s->cluster_size * 2; |
535 |
p[8] = (cylinders >> 8) & 0xff; |
536 |
p[9] = cylinders & 0xff; |
537 |
/* Write precomp start cylinder, disabled */
|
538 |
p[10] = (cylinders >> 8) & 0xff; |
539 |
p[11] = cylinders & 0xff; |
540 |
/* Reduced current start cylinder, disabled */
|
541 |
p[12] = (cylinders >> 8) & 0xff; |
542 |
p[13] = cylinders & 0xff; |
543 |
/* Device step rate [100us], 100us */
|
544 |
p[14] = 0; |
545 |
p[15] = 1; |
546 |
/* Device step pulse width [us], 1us */
|
547 |
p[16] = 1; |
548 |
/* Device head settle delay [100us], 100us */
|
549 |
p[17] = 0; |
550 |
p[18] = 1; |
551 |
/* Motor on delay [0.1s], 0.1s */
|
552 |
p[19] = 1; |
553 |
/* Motor off delay [0.1s], 0.1s */
|
554 |
p[20] = 1; |
555 |
/* Medium rotation rate [rpm], 5400 rpm */
|
556 |
p[28] = (5400 >> 8) & 0xff; |
557 |
p[29] = 5400 & 0xff; |
558 |
return 0x1e; |
559 |
|
560 |
case 8: /* Caching page. */ |
561 |
p[0] = 8; |
562 |
p[1] = 0x12; |
563 |
if (bdrv_enable_write_cache(s->bs)) {
|
564 |
p[2] = 4; /* WCE */ |
565 |
} |
566 |
return 20; |
567 |
|
568 |
case 0x2a: /* CD Capabilities and Mechanical Status page. */ |
569 |
if (bdrv_get_type_hint(bdrv) != BDRV_TYPE_CDROM)
|
570 |
return 0; |
571 |
p[0] = 0x2a; |
572 |
p[1] = 0x14; |
573 |
p[2] = 3; // CD-R & CD-RW read |
574 |
p[3] = 0; // Writing not supported |
575 |
p[4] = 0x7f; /* Audio, composite, digital out, |
576 |
mode 2 form 1&2, multi session */
|
577 |
p[5] = 0xff; /* CD DA, DA accurate, RW supported, |
578 |
RW corrected, C2 errors, ISRC,
|
579 |
UPC, Bar code */
|
580 |
p[6] = 0x2d | (bdrv_is_locked(s->bs)? 2 : 0); |
581 |
/* Locking supported, jumper present, eject, tray */
|
582 |
p[7] = 0; /* no volume & mute control, no |
583 |
changer */
|
584 |
p[8] = (50 * 176) >> 8; // 50x read speed |
585 |
p[9] = (50 * 176) & 0xff; |
586 |
p[10] = 0 >> 8; // No volume |
587 |
p[11] = 0 & 0xff; |
588 |
p[12] = 2048 >> 8; // 2M buffer |
589 |
p[13] = 2048 & 0xff; |
590 |
p[14] = (16 * 176) >> 8; // 16x read speed current |
591 |
p[15] = (16 * 176) & 0xff; |
592 |
p[18] = (16 * 176) >> 8; // 16x write speed |
593 |
p[19] = (16 * 176) & 0xff; |
594 |
p[20] = (16 * 176) >> 8; // 16x write speed current |
595 |
p[21] = (16 * 176) & 0xff; |
596 |
return 22; |
597 |
|
598 |
default:
|
599 |
return 0; |
600 |
} |
601 |
} |
602 |
|
603 |
static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf) |
604 |
{ |
605 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
606 |
uint64_t nb_sectors; |
607 |
int page, dbd, buflen;
|
608 |
uint8_t *p; |
609 |
|
610 |
dbd = req->cmd.buf[1] & 0x8; |
611 |
page = req->cmd.buf[2] & 0x3f; |
612 |
DPRINTF("Mode Sense (page %d, len %zd)\n", page, req->cmd.xfer);
|
613 |
memset(outbuf, 0, req->cmd.xfer);
|
614 |
p = outbuf; |
615 |
|
616 |
p[1] = 0; /* Default media type. */ |
617 |
p[3] = 0; /* Block descriptor length. */ |
618 |
if (bdrv_is_read_only(s->bs)) {
|
619 |
p[2] = 0x80; /* Readonly. */ |
620 |
} |
621 |
p += 4;
|
622 |
|
623 |
bdrv_get_geometry(s->bs, &nb_sectors); |
624 |
if ((~dbd) & nb_sectors) {
|
625 |
outbuf[3] = 8; /* Block descriptor length */ |
626 |
nb_sectors /= s->cluster_size; |
627 |
nb_sectors--; |
628 |
if (nb_sectors > 0xffffff) |
629 |
nb_sectors = 0xffffff;
|
630 |
p[0] = 0; /* media density code */ |
631 |
p[1] = (nb_sectors >> 16) & 0xff; |
632 |
p[2] = (nb_sectors >> 8) & 0xff; |
633 |
p[3] = nb_sectors & 0xff; |
634 |
p[4] = 0; /* reserved */ |
635 |
p[5] = 0; /* bytes 5-7 are the sector size in bytes */ |
636 |
p[6] = s->cluster_size * 2; |
637 |
p[7] = 0; |
638 |
p += 8;
|
639 |
} |
640 |
|
641 |
switch (page) {
|
642 |
case 0x04: |
643 |
case 0x05: |
644 |
case 0x08: |
645 |
case 0x2a: |
646 |
p += mode_sense_page(req, page, p); |
647 |
break;
|
648 |
case 0x3f: |
649 |
p += mode_sense_page(req, 0x08, p);
|
650 |
p += mode_sense_page(req, 0x2a, p);
|
651 |
break;
|
652 |
} |
653 |
|
654 |
buflen = p - outbuf; |
655 |
outbuf[0] = buflen - 4; |
656 |
if (buflen > req->cmd.xfer)
|
657 |
buflen = req->cmd.xfer; |
658 |
return buflen;
|
659 |
} |
660 |
|
661 |
static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf) |
662 |
{ |
663 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
664 |
int start_track, format, msf, toclen;
|
665 |
uint64_t nb_sectors; |
666 |
|
667 |
msf = req->cmd.buf[1] & 2; |
668 |
format = req->cmd.buf[2] & 0xf; |
669 |
start_track = req->cmd.buf[6];
|
670 |
bdrv_get_geometry(s->bs, &nb_sectors); |
671 |
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
672 |
nb_sectors /= s->cluster_size; |
673 |
switch (format) {
|
674 |
case 0: |
675 |
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); |
676 |
break;
|
677 |
case 1: |
678 |
/* multi session : only a single session defined */
|
679 |
toclen = 12;
|
680 |
memset(outbuf, 0, 12); |
681 |
outbuf[1] = 0x0a; |
682 |
outbuf[2] = 0x01; |
683 |
outbuf[3] = 0x01; |
684 |
break;
|
685 |
case 2: |
686 |
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); |
687 |
break;
|
688 |
default:
|
689 |
return -1; |
690 |
} |
691 |
if (toclen > req->cmd.xfer)
|
692 |
toclen = req->cmd.xfer; |
693 |
return toclen;
|
694 |
} |
695 |
|
696 |
static int scsi_disk_emulate_command(SCSIRequest *req, uint8_t *outbuf) |
697 |
{ |
698 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
699 |
uint64_t nb_sectors; |
700 |
int buflen = 0; |
701 |
|
702 |
switch (req->cmd.buf[0]) { |
703 |
case TEST_UNIT_READY:
|
704 |
if (!bdrv_is_inserted(s->bs))
|
705 |
goto not_ready;
|
706 |
break;
|
707 |
case REQUEST_SENSE:
|
708 |
if (req->cmd.xfer < 4) |
709 |
goto illegal_request;
|
710 |
memset(outbuf, 0, 4); |
711 |
buflen = 4;
|
712 |
if (req->dev->sense.key == NOT_READY && req->cmd.xfer >= 18) { |
713 |
memset(outbuf, 0, 18); |
714 |
buflen = 18;
|
715 |
outbuf[7] = 10; |
716 |
/* asc 0x3a, ascq 0: Medium not present */
|
717 |
outbuf[12] = 0x3a; |
718 |
outbuf[13] = 0; |
719 |
} |
720 |
outbuf[0] = 0xf0; |
721 |
outbuf[1] = 0; |
722 |
outbuf[2] = req->dev->sense.key;
|
723 |
scsi_dev_clear_sense(req->dev); |
724 |
break;
|
725 |
case INQUIRY:
|
726 |
buflen = scsi_disk_emulate_inquiry(req, outbuf); |
727 |
if (buflen < 0) |
728 |
goto illegal_request;
|
729 |
break;
|
730 |
case MODE_SENSE:
|
731 |
case MODE_SENSE_10:
|
732 |
buflen = scsi_disk_emulate_mode_sense(req, outbuf); |
733 |
if (buflen < 0) |
734 |
goto illegal_request;
|
735 |
break;
|
736 |
case READ_TOC:
|
737 |
buflen = scsi_disk_emulate_read_toc(req, outbuf); |
738 |
if (buflen < 0) |
739 |
goto illegal_request;
|
740 |
break;
|
741 |
case RESERVE:
|
742 |
if (req->cmd.buf[1] & 1) |
743 |
goto illegal_request;
|
744 |
break;
|
745 |
case RESERVE_10:
|
746 |
if (req->cmd.buf[1] & 3) |
747 |
goto illegal_request;
|
748 |
break;
|
749 |
case RELEASE:
|
750 |
if (req->cmd.buf[1] & 1) |
751 |
goto illegal_request;
|
752 |
break;
|
753 |
case RELEASE_10:
|
754 |
if (req->cmd.buf[1] & 3) |
755 |
goto illegal_request;
|
756 |
break;
|
757 |
case START_STOP:
|
758 |
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM && (req->cmd.buf[4] & 2)) { |
759 |
/* load/eject medium */
|
760 |
bdrv_eject(s->bs, !(req->cmd.buf[4] & 1)); |
761 |
} |
762 |
break;
|
763 |
case ALLOW_MEDIUM_REMOVAL:
|
764 |
bdrv_set_locked(s->bs, req->cmd.buf[4] & 1); |
765 |
break;
|
766 |
case READ_CAPACITY:
|
767 |
/* The normal LEN field for this command is zero. */
|
768 |
memset(outbuf, 0, 8); |
769 |
bdrv_get_geometry(s->bs, &nb_sectors); |
770 |
if (!nb_sectors)
|
771 |
goto not_ready;
|
772 |
nb_sectors /= s->cluster_size; |
773 |
/* Returned value is the address of the last sector. */
|
774 |
nb_sectors--; |
775 |
/* Remember the new size for read/write sanity checking. */
|
776 |
s->max_lba = nb_sectors; |
777 |
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
|
778 |
if (nb_sectors > UINT32_MAX)
|
779 |
nb_sectors = UINT32_MAX; |
780 |
outbuf[0] = (nb_sectors >> 24) & 0xff; |
781 |
outbuf[1] = (nb_sectors >> 16) & 0xff; |
782 |
outbuf[2] = (nb_sectors >> 8) & 0xff; |
783 |
outbuf[3] = nb_sectors & 0xff; |
784 |
outbuf[4] = 0; |
785 |
outbuf[5] = 0; |
786 |
outbuf[6] = s->cluster_size * 2; |
787 |
outbuf[7] = 0; |
788 |
buflen = 8;
|
789 |
break;
|
790 |
case SYNCHRONIZE_CACHE:
|
791 |
bdrv_flush(s->bs); |
792 |
break;
|
793 |
case GET_CONFIGURATION:
|
794 |
memset(outbuf, 0, 8); |
795 |
/* ??? This should probably return much more information. For now
|
796 |
just return the basic header indicating the CD-ROM profile. */
|
797 |
outbuf[7] = 8; // CD-ROM |
798 |
buflen = 8;
|
799 |
break;
|
800 |
case SERVICE_ACTION_IN:
|
801 |
/* Service Action In subcommands. */
|
802 |
if ((req->cmd.buf[1] & 31) == 0x10) { |
803 |
DPRINTF("SAI READ CAPACITY(16)\n");
|
804 |
memset(outbuf, 0, req->cmd.xfer);
|
805 |
bdrv_get_geometry(s->bs, &nb_sectors); |
806 |
if (!nb_sectors)
|
807 |
goto not_ready;
|
808 |
nb_sectors /= s->cluster_size; |
809 |
/* Returned value is the address of the last sector. */
|
810 |
nb_sectors--; |
811 |
/* Remember the new size for read/write sanity checking. */
|
812 |
s->max_lba = nb_sectors; |
813 |
outbuf[0] = (nb_sectors >> 56) & 0xff; |
814 |
outbuf[1] = (nb_sectors >> 48) & 0xff; |
815 |
outbuf[2] = (nb_sectors >> 40) & 0xff; |
816 |
outbuf[3] = (nb_sectors >> 32) & 0xff; |
817 |
outbuf[4] = (nb_sectors >> 24) & 0xff; |
818 |
outbuf[5] = (nb_sectors >> 16) & 0xff; |
819 |
outbuf[6] = (nb_sectors >> 8) & 0xff; |
820 |
outbuf[7] = nb_sectors & 0xff; |
821 |
outbuf[8] = 0; |
822 |
outbuf[9] = 0; |
823 |
outbuf[10] = s->cluster_size * 2; |
824 |
outbuf[11] = 0; |
825 |
outbuf[12] = 0; |
826 |
outbuf[13] = get_physical_block_exp(&s->qdev.conf);
|
827 |
/* Protection, exponent and lowest lba field left blank. */
|
828 |
buflen = req->cmd.xfer; |
829 |
break;
|
830 |
} |
831 |
DPRINTF("Unsupported Service Action In\n");
|
832 |
goto illegal_request;
|
833 |
case REPORT_LUNS:
|
834 |
if (req->cmd.xfer < 16) |
835 |
goto illegal_request;
|
836 |
memset(outbuf, 0, 16); |
837 |
outbuf[3] = 8; |
838 |
buflen = 16;
|
839 |
break;
|
840 |
case VERIFY:
|
841 |
break;
|
842 |
default:
|
843 |
goto illegal_request;
|
844 |
} |
845 |
scsi_req_set_status(req, GOOD, NO_SENSE); |
846 |
return buflen;
|
847 |
|
848 |
not_ready:
|
849 |
scsi_req_set_status(req, CHECK_CONDITION, NOT_READY); |
850 |
return 0; |
851 |
|
852 |
illegal_request:
|
853 |
scsi_req_set_status(req, CHECK_CONDITION, ILLEGAL_REQUEST); |
854 |
return 0; |
855 |
} |
856 |
|
857 |
/* Execute a scsi command. Returns the length of the data expected by the
|
858 |
command. This will be Positive for data transfers from the device
|
859 |
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
860 |
and zero if the command does not transfer any data. */
|
861 |
|
862 |
static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
|
863 |
uint8_t *buf, int lun)
|
864 |
{ |
865 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
866 |
uint64_t lba; |
867 |
uint32_t len; |
868 |
int cmdlen;
|
869 |
int is_write;
|
870 |
uint8_t command; |
871 |
uint8_t *outbuf; |
872 |
SCSIDiskReq *r; |
873 |
int rc;
|
874 |
|
875 |
command = buf[0];
|
876 |
r = scsi_find_request(s, tag); |
877 |
if (r) {
|
878 |
BADF("Tag 0x%x already in use\n", tag);
|
879 |
scsi_cancel_io(d, tag); |
880 |
} |
881 |
/* ??? Tags are not unique for different luns. We only implement a
|
882 |
single lun, so this should not matter. */
|
883 |
r = scsi_new_request(d, tag, lun); |
884 |
outbuf = (uint8_t *)r->iov.iov_base; |
885 |
is_write = 0;
|
886 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]); |
887 |
switch (command >> 5) { |
888 |
case 0: |
889 |
lba = (uint64_t) buf[3] | ((uint64_t) buf[2] << 8) | |
890 |
(((uint64_t) buf[1] & 0x1f) << 16); |
891 |
len = buf[4];
|
892 |
cmdlen = 6;
|
893 |
break;
|
894 |
case 1: |
895 |
case 2: |
896 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
897 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
898 |
len = buf[8] | (buf[7] << 8); |
899 |
cmdlen = 10;
|
900 |
break;
|
901 |
case 4: |
902 |
lba = (uint64_t) buf[9] | ((uint64_t) buf[8] << 8) | |
903 |
((uint64_t) buf[7] << 16) | ((uint64_t) buf[6] << 24) | |
904 |
((uint64_t) buf[5] << 32) | ((uint64_t) buf[4] << 40) | |
905 |
((uint64_t) buf[3] << 48) | ((uint64_t) buf[2] << 56); |
906 |
len = buf[13] | (buf[12] << 8) | (buf[11] << 16) | (buf[10] << 24); |
907 |
cmdlen = 16;
|
908 |
break;
|
909 |
case 5: |
910 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
911 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
912 |
len = buf[9] | (buf[8] << 8) | (buf[7] << 16) | (buf[6] << 24); |
913 |
cmdlen = 12;
|
914 |
break;
|
915 |
default:
|
916 |
BADF("Unsupported command length, command %x\n", command);
|
917 |
goto fail;
|
918 |
} |
919 |
#ifdef DEBUG_SCSI
|
920 |
{ |
921 |
int i;
|
922 |
for (i = 1; i < cmdlen; i++) { |
923 |
printf(" 0x%02x", buf[i]);
|
924 |
} |
925 |
printf("\n");
|
926 |
} |
927 |
#endif
|
928 |
|
929 |
if (scsi_req_parse(&r->req, buf) != 0) { |
930 |
BADF("Unsupported command length, command %x\n", command);
|
931 |
goto fail;
|
932 |
} |
933 |
assert(r->req.cmd.len == cmdlen); |
934 |
assert(r->req.cmd.lba == lba); |
935 |
|
936 |
if (lun || buf[1] >> 5) { |
937 |
/* Only LUN 0 supported. */
|
938 |
DPRINTF("Unimplemented LUN %d\n", lun ? lun : buf[1] >> 5); |
939 |
if (command != REQUEST_SENSE && command != INQUIRY)
|
940 |
goto fail;
|
941 |
} |
942 |
switch (command) {
|
943 |
case TEST_UNIT_READY:
|
944 |
case REQUEST_SENSE:
|
945 |
case INQUIRY:
|
946 |
case MODE_SENSE:
|
947 |
case MODE_SENSE_10:
|
948 |
case RESERVE:
|
949 |
case RESERVE_10:
|
950 |
case RELEASE:
|
951 |
case RELEASE_10:
|
952 |
case START_STOP:
|
953 |
case ALLOW_MEDIUM_REMOVAL:
|
954 |
case READ_CAPACITY:
|
955 |
case SYNCHRONIZE_CACHE:
|
956 |
case READ_TOC:
|
957 |
case GET_CONFIGURATION:
|
958 |
case SERVICE_ACTION_IN:
|
959 |
case REPORT_LUNS:
|
960 |
case VERIFY:
|
961 |
rc = scsi_disk_emulate_command(&r->req, outbuf); |
962 |
if (rc > 0) { |
963 |
r->iov.iov_len = rc; |
964 |
} else {
|
965 |
scsi_req_complete(&r->req); |
966 |
scsi_remove_request(r); |
967 |
return 0; |
968 |
} |
969 |
break;
|
970 |
case READ_6:
|
971 |
case READ_10:
|
972 |
case READ_12:
|
973 |
case READ_16:
|
974 |
DPRINTF("Read (sector %" PRId64 ", count %d)\n", lba, len); |
975 |
if (lba > s->max_lba)
|
976 |
goto illegal_lba;
|
977 |
r->sector = lba * s->cluster_size; |
978 |
r->sector_count = len * s->cluster_size; |
979 |
break;
|
980 |
case WRITE_6:
|
981 |
case WRITE_10:
|
982 |
case WRITE_12:
|
983 |
case WRITE_16:
|
984 |
DPRINTF("Write (sector %" PRId64 ", count %d)\n", lba, len); |
985 |
if (lba > s->max_lba)
|
986 |
goto illegal_lba;
|
987 |
r->sector = lba * s->cluster_size; |
988 |
r->sector_count = len * s->cluster_size; |
989 |
is_write = 1;
|
990 |
break;
|
991 |
default:
|
992 |
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
993 |
fail:
|
994 |
scsi_command_complete(r, CHECK_CONDITION, ILLEGAL_REQUEST); |
995 |
return 0; |
996 |
illegal_lba:
|
997 |
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
998 |
return 0; |
999 |
} |
1000 |
if (r->sector_count == 0 && r->iov.iov_len == 0) { |
1001 |
scsi_command_complete(r, GOOD, NO_SENSE); |
1002 |
} |
1003 |
len = r->sector_count * 512 + r->iov.iov_len;
|
1004 |
if (is_write) {
|
1005 |
return -len;
|
1006 |
} else {
|
1007 |
if (!r->sector_count)
|
1008 |
r->sector_count = -1;
|
1009 |
return len;
|
1010 |
} |
1011 |
} |
1012 |
|
1013 |
static void scsi_disk_purge_requests(SCSIDiskState *s) |
1014 |
{ |
1015 |
SCSIDiskReq *r; |
1016 |
|
1017 |
while (!QTAILQ_EMPTY(&s->qdev.requests)) {
|
1018 |
r = DO_UPCAST(SCSIDiskReq, req, QTAILQ_FIRST(&s->qdev.requests)); |
1019 |
if (r->req.aiocb) {
|
1020 |
bdrv_aio_cancel(r->req.aiocb); |
1021 |
} |
1022 |
scsi_remove_request(r); |
1023 |
} |
1024 |
} |
1025 |
|
1026 |
static void scsi_disk_reset(DeviceState *dev) |
1027 |
{ |
1028 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev); |
1029 |
uint64_t nb_sectors; |
1030 |
|
1031 |
scsi_disk_purge_requests(s); |
1032 |
|
1033 |
bdrv_get_geometry(s->bs, &nb_sectors); |
1034 |
nb_sectors /= s->cluster_size; |
1035 |
if (nb_sectors) {
|
1036 |
nb_sectors--; |
1037 |
} |
1038 |
s->max_lba = nb_sectors; |
1039 |
} |
1040 |
|
1041 |
static void scsi_destroy(SCSIDevice *dev) |
1042 |
{ |
1043 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
1044 |
|
1045 |
scsi_disk_purge_requests(s); |
1046 |
drive_uninit(s->qdev.conf.dinfo); |
1047 |
} |
1048 |
|
1049 |
static int scsi_disk_initfn(SCSIDevice *dev) |
1050 |
{ |
1051 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
1052 |
|
1053 |
if (!s->qdev.conf.dinfo || !s->qdev.conf.dinfo->bdrv) {
|
1054 |
error_report("scsi-disk: drive property not set");
|
1055 |
return -1; |
1056 |
} |
1057 |
s->bs = s->qdev.conf.dinfo->bdrv; |
1058 |
|
1059 |
if (!s->serial) {
|
1060 |
if (*dev->conf.dinfo->serial) {
|
1061 |
/* try to fall back to value set with legacy -drive serial=... */
|
1062 |
s->serial = qemu_strdup(dev->conf.dinfo->serial); |
1063 |
} else {
|
1064 |
s->serial = qemu_strdup("0");
|
1065 |
} |
1066 |
} |
1067 |
|
1068 |
if (!s->version) {
|
1069 |
s->version = qemu_strdup(QEMU_VERSION); |
1070 |
} |
1071 |
|
1072 |
if (bdrv_is_sg(s->bs)) {
|
1073 |
error_report("scsi-disk: unwanted /dev/sg*");
|
1074 |
return -1; |
1075 |
} |
1076 |
|
1077 |
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
|
1078 |
s->qdev.blocksize = 2048;
|
1079 |
} else {
|
1080 |
s->qdev.blocksize = s->qdev.conf.logical_block_size; |
1081 |
} |
1082 |
s->cluster_size = s->qdev.blocksize / 512;
|
1083 |
|
1084 |
s->qdev.type = TYPE_DISK; |
1085 |
qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s); |
1086 |
return 0; |
1087 |
} |
1088 |
|
1089 |
static SCSIDeviceInfo scsi_disk_info = {
|
1090 |
.qdev.name = "scsi-disk",
|
1091 |
.qdev.desc = "virtual scsi disk or cdrom",
|
1092 |
.qdev.size = sizeof(SCSIDiskState),
|
1093 |
.qdev.reset = scsi_disk_reset, |
1094 |
.init = scsi_disk_initfn, |
1095 |
.destroy = scsi_destroy, |
1096 |
.send_command = scsi_send_command, |
1097 |
.read_data = scsi_read_data, |
1098 |
.write_data = scsi_write_data, |
1099 |
.cancel_io = scsi_cancel_io, |
1100 |
.get_buf = scsi_get_buf, |
1101 |
.qdev.props = (Property[]) { |
1102 |
DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf), |
1103 |
DEFINE_PROP_STRING("ver", SCSIDiskState, version),
|
1104 |
DEFINE_PROP_STRING("serial", SCSIDiskState, serial),
|
1105 |
DEFINE_PROP_END_OF_LIST(), |
1106 |
}, |
1107 |
}; |
1108 |
|
1109 |
static void scsi_disk_register_devices(void) |
1110 |
{ |
1111 |
scsi_qdev_register(&scsi_disk_info); |
1112 |
} |
1113 |
device_init(scsi_disk_register_devices) |