root / hw / scsi-disk.c @ 3d53f5c3
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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 "block.h" |
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#include "scsi.h" |
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#include "scsi-defs.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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}; |
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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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BlockInterfaceErrorAction action = drive_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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} |
320 |
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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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} |
331 |
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if (req->cmd.buf[1] & 0x1) { |
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/* Vital product data */
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uint8_t page_code = req->cmd.buf[2];
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if (req->cmd.xfer < 4) { |
336 |
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; |
339 |
} |
340 |
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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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} |
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outbuf[buflen++] = page_code ; // this page
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outbuf[buflen++] = 0x00;
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348 |
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switch (page_code) {
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case 0x00: /* Supported page codes, mandatory */ |
351 |
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 |
354 |
outbuf[buflen++] = 0x00; // list of supported pages (this page) |
355 |
outbuf[buflen++] = 0x80; // unit serial number |
356 |
outbuf[buflen++] = 0x83; // device identification |
357 |
outbuf[buflen++] = 0xb0; // block device characteristics |
358 |
break;
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359 |
|
360 |
case 0x80: /* Device serial number, optional */ |
361 |
{ |
362 |
const char *serial = req->dev->conf.dinfo->serial ? |
363 |
req->dev->conf.dinfo->serial : "0";
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364 |
int l = strlen(serial);
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365 |
|
366 |
if (l > req->cmd.xfer)
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l = req->cmd.xfer; |
368 |
if (l > 20) |
369 |
l = 20;
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370 |
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371 |
DPRINTF("Inquiry EVPD[Serial number] "
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"buffer size %zd\n", req->cmd.xfer);
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outbuf[buflen++] = l; |
374 |
memcpy(outbuf+buflen, serial, l); |
375 |
buflen += l; |
376 |
break;
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377 |
} |
378 |
|
379 |
case 0x83: /* Device identification page, mandatory */ |
380 |
{ |
381 |
int max_len = 255 - 8; |
382 |
int id_len = strlen(bdrv_get_device_name(s->bs));
|
383 |
|
384 |
if (id_len > max_len)
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385 |
id_len = max_len; |
386 |
DPRINTF("Inquiry EVPD[Device identification] "
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387 |
"buffer size %zd\n", req->cmd.xfer);
|
388 |
|
389 |
outbuf[buflen++] = 3 + id_len;
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390 |
outbuf[buflen++] = 0x2; // ASCII |
391 |
outbuf[buflen++] = 0; // not officially assigned |
392 |
outbuf[buflen++] = 0; // reserved |
393 |
outbuf[buflen++] = id_len; // length of data following
|
394 |
|
395 |
memcpy(outbuf+buflen, bdrv_get_device_name(s->bs), id_len); |
396 |
buflen += id_len; |
397 |
break;
|
398 |
} |
399 |
case 0xb0: /* block device characteristics */ |
400 |
{ |
401 |
unsigned int min_io_size = |
402 |
s->qdev.conf.min_io_size / s->qdev.blocksize; |
403 |
unsigned int opt_io_size = |
404 |
s->qdev.conf.opt_io_size / s->qdev.blocksize; |
405 |
|
406 |
/* required VPD size with unmap support */
|
407 |
outbuf[3] = buflen = 0x3c; |
408 |
|
409 |
memset(outbuf + 4, 0, buflen - 4); |
410 |
|
411 |
/* optimal transfer length granularity */
|
412 |
outbuf[6] = (min_io_size >> 8) & 0xff; |
413 |
outbuf[7] = min_io_size & 0xff; |
414 |
|
415 |
/* optimal transfer length */
|
416 |
outbuf[12] = (opt_io_size >> 24) & 0xff; |
417 |
outbuf[13] = (opt_io_size >> 16) & 0xff; |
418 |
outbuf[14] = (opt_io_size >> 8) & 0xff; |
419 |
outbuf[15] = opt_io_size & 0xff; |
420 |
break;
|
421 |
} |
422 |
default:
|
423 |
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
|
424 |
"buffer size %zd\n", page_code, req->cmd.xfer);
|
425 |
return -1; |
426 |
} |
427 |
/* done with EVPD */
|
428 |
return buflen;
|
429 |
} |
430 |
|
431 |
/* Standard INQUIRY data */
|
432 |
if (req->cmd.buf[2] != 0) { |
433 |
BADF("Error: Inquiry (STANDARD) page or code "
|
434 |
"is non-zero [%02X]\n", req->cmd.buf[2]); |
435 |
return -1; |
436 |
} |
437 |
|
438 |
/* PAGE CODE == 0 */
|
439 |
if (req->cmd.xfer < 5) { |
440 |
BADF("Error: Inquiry (STANDARD) buffer size %zd "
|
441 |
"is less than 5\n", req->cmd.xfer);
|
442 |
return -1; |
443 |
} |
444 |
|
445 |
buflen = req->cmd.xfer; |
446 |
if (buflen > SCSI_MAX_INQUIRY_LEN)
|
447 |
buflen = SCSI_MAX_INQUIRY_LEN; |
448 |
|
449 |
memset(outbuf, 0, buflen);
|
450 |
|
451 |
if (req->lun || req->cmd.buf[1] >> 5) { |
452 |
outbuf[0] = 0x7f; /* LUN not supported */ |
453 |
return buflen;
|
454 |
} |
455 |
|
456 |
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
|
457 |
outbuf[0] = 5; |
458 |
outbuf[1] = 0x80; |
459 |
memcpy(&outbuf[16], "QEMU CD-ROM ", 16); |
460 |
} else {
|
461 |
outbuf[0] = 0; |
462 |
memcpy(&outbuf[16], "QEMU HARDDISK ", 16); |
463 |
} |
464 |
memcpy(&outbuf[8], "QEMU ", 8); |
465 |
memset(&outbuf[32], 0, 4); |
466 |
memcpy(&outbuf[32], s->version ? s->version : QEMU_VERSION,
|
467 |
MIN(4, strlen(s->version ? s->version : QEMU_VERSION)));
|
468 |
/*
|
469 |
* We claim conformance to SPC-3, which is required for guests
|
470 |
* to ask for modern features like READ CAPACITY(16) or the
|
471 |
* block characteristics VPD page by default. Not all of SPC-3
|
472 |
* is actually implemented, but we're good enough.
|
473 |
*/
|
474 |
outbuf[2] = 5; |
475 |
outbuf[3] = 2; /* Format 2 */ |
476 |
|
477 |
if (buflen > 36) { |
478 |
outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */ |
479 |
} else {
|
480 |
/* If the allocation length of CDB is too small,
|
481 |
the additional length is not adjusted */
|
482 |
outbuf[4] = 36 - 5; |
483 |
} |
484 |
|
485 |
/* Sync data transfer and TCQ. */
|
486 |
outbuf[7] = 0x10 | (req->bus->tcq ? 0x02 : 0); |
487 |
return buflen;
|
488 |
} |
489 |
|
490 |
static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p) |
491 |
{ |
492 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
493 |
BlockDriverState *bdrv = s->bs; |
494 |
int cylinders, heads, secs;
|
495 |
|
496 |
switch (page) {
|
497 |
case 4: /* Rigid disk device geometry page. */ |
498 |
p[0] = 4; |
499 |
p[1] = 0x16; |
500 |
/* if a geometry hint is available, use it */
|
501 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
502 |
p[2] = (cylinders >> 16) & 0xff; |
503 |
p[3] = (cylinders >> 8) & 0xff; |
504 |
p[4] = cylinders & 0xff; |
505 |
p[5] = heads & 0xff; |
506 |
/* Write precomp start cylinder, disabled */
|
507 |
p[6] = (cylinders >> 16) & 0xff; |
508 |
p[7] = (cylinders >> 8) & 0xff; |
509 |
p[8] = cylinders & 0xff; |
510 |
/* Reduced current start cylinder, disabled */
|
511 |
p[9] = (cylinders >> 16) & 0xff; |
512 |
p[10] = (cylinders >> 8) & 0xff; |
513 |
p[11] = cylinders & 0xff; |
514 |
/* Device step rate [ns], 200ns */
|
515 |
p[12] = 0; |
516 |
p[13] = 200; |
517 |
/* Landing zone cylinder */
|
518 |
p[14] = 0xff; |
519 |
p[15] = 0xff; |
520 |
p[16] = 0xff; |
521 |
/* Medium rotation rate [rpm], 5400 rpm */
|
522 |
p[20] = (5400 >> 8) & 0xff; |
523 |
p[21] = 5400 & 0xff; |
524 |
return 0x16; |
525 |
|
526 |
case 5: /* Flexible disk device geometry page. */ |
527 |
p[0] = 5; |
528 |
p[1] = 0x1e; |
529 |
/* Transfer rate [kbit/s], 5Mbit/s */
|
530 |
p[2] = 5000 >> 8; |
531 |
p[3] = 5000 & 0xff; |
532 |
/* if a geometry hint is available, use it */
|
533 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
534 |
p[4] = heads & 0xff; |
535 |
p[5] = secs & 0xff; |
536 |
p[6] = s->cluster_size * 2; |
537 |
p[8] = (cylinders >> 8) & 0xff; |
538 |
p[9] = cylinders & 0xff; |
539 |
/* Write precomp start cylinder, disabled */
|
540 |
p[10] = (cylinders >> 8) & 0xff; |
541 |
p[11] = cylinders & 0xff; |
542 |
/* Reduced current start cylinder, disabled */
|
543 |
p[12] = (cylinders >> 8) & 0xff; |
544 |
p[13] = cylinders & 0xff; |
545 |
/* Device step rate [100us], 100us */
|
546 |
p[14] = 0; |
547 |
p[15] = 1; |
548 |
/* Device step pulse width [us], 1us */
|
549 |
p[16] = 1; |
550 |
/* Device head settle delay [100us], 100us */
|
551 |
p[17] = 0; |
552 |
p[18] = 1; |
553 |
/* Motor on delay [0.1s], 0.1s */
|
554 |
p[19] = 1; |
555 |
/* Motor off delay [0.1s], 0.1s */
|
556 |
p[20] = 1; |
557 |
/* Medium rotation rate [rpm], 5400 rpm */
|
558 |
p[28] = (5400 >> 8) & 0xff; |
559 |
p[29] = 5400 & 0xff; |
560 |
return 0x1e; |
561 |
|
562 |
case 8: /* Caching page. */ |
563 |
p[0] = 8; |
564 |
p[1] = 0x12; |
565 |
if (bdrv_enable_write_cache(s->bs)) {
|
566 |
p[2] = 4; /* WCE */ |
567 |
} |
568 |
return 20; |
569 |
|
570 |
case 0x2a: /* CD Capabilities and Mechanical Status page. */ |
571 |
if (bdrv_get_type_hint(bdrv) != BDRV_TYPE_CDROM)
|
572 |
return 0; |
573 |
p[0] = 0x2a; |
574 |
p[1] = 0x14; |
575 |
p[2] = 3; // CD-R & CD-RW read |
576 |
p[3] = 0; // Writing not supported |
577 |
p[4] = 0x7f; /* Audio, composite, digital out, |
578 |
mode 2 form 1&2, multi session */
|
579 |
p[5] = 0xff; /* CD DA, DA accurate, RW supported, |
580 |
RW corrected, C2 errors, ISRC,
|
581 |
UPC, Bar code */
|
582 |
p[6] = 0x2d | (bdrv_is_locked(s->bs)? 2 : 0); |
583 |
/* Locking supported, jumper present, eject, tray */
|
584 |
p[7] = 0; /* no volume & mute control, no |
585 |
changer */
|
586 |
p[8] = (50 * 176) >> 8; // 50x read speed |
587 |
p[9] = (50 * 176) & 0xff; |
588 |
p[10] = 0 >> 8; // No volume |
589 |
p[11] = 0 & 0xff; |
590 |
p[12] = 2048 >> 8; // 2M buffer |
591 |
p[13] = 2048 & 0xff; |
592 |
p[14] = (16 * 176) >> 8; // 16x read speed current |
593 |
p[15] = (16 * 176) & 0xff; |
594 |
p[18] = (16 * 176) >> 8; // 16x write speed |
595 |
p[19] = (16 * 176) & 0xff; |
596 |
p[20] = (16 * 176) >> 8; // 16x write speed current |
597 |
p[21] = (16 * 176) & 0xff; |
598 |
return 22; |
599 |
|
600 |
default:
|
601 |
return 0; |
602 |
} |
603 |
} |
604 |
|
605 |
static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf) |
606 |
{ |
607 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
608 |
uint64_t nb_sectors; |
609 |
int page, dbd, buflen;
|
610 |
uint8_t *p; |
611 |
|
612 |
dbd = req->cmd.buf[1] & 0x8; |
613 |
page = req->cmd.buf[2] & 0x3f; |
614 |
DPRINTF("Mode Sense (page %d, len %zd)\n", page, req->cmd.xfer);
|
615 |
memset(outbuf, 0, req->cmd.xfer);
|
616 |
p = outbuf; |
617 |
|
618 |
p[1] = 0; /* Default media type. */ |
619 |
p[3] = 0; /* Block descriptor length. */ |
620 |
if (bdrv_is_read_only(s->bs)) {
|
621 |
p[2] = 0x80; /* Readonly. */ |
622 |
} |
623 |
p += 4;
|
624 |
|
625 |
bdrv_get_geometry(s->bs, &nb_sectors); |
626 |
if ((~dbd) & nb_sectors) {
|
627 |
outbuf[3] = 8; /* Block descriptor length */ |
628 |
nb_sectors /= s->cluster_size; |
629 |
nb_sectors--; |
630 |
if (nb_sectors > 0xffffff) |
631 |
nb_sectors = 0xffffff;
|
632 |
p[0] = 0; /* media density code */ |
633 |
p[1] = (nb_sectors >> 16) & 0xff; |
634 |
p[2] = (nb_sectors >> 8) & 0xff; |
635 |
p[3] = nb_sectors & 0xff; |
636 |
p[4] = 0; /* reserved */ |
637 |
p[5] = 0; /* bytes 5-7 are the sector size in bytes */ |
638 |
p[6] = s->cluster_size * 2; |
639 |
p[7] = 0; |
640 |
p += 8;
|
641 |
} |
642 |
|
643 |
switch (page) {
|
644 |
case 0x04: |
645 |
case 0x05: |
646 |
case 0x08: |
647 |
case 0x2a: |
648 |
p += mode_sense_page(req, page, p); |
649 |
break;
|
650 |
case 0x3f: |
651 |
p += mode_sense_page(req, 0x08, p);
|
652 |
p += mode_sense_page(req, 0x2a, p);
|
653 |
break;
|
654 |
} |
655 |
|
656 |
buflen = p - outbuf; |
657 |
outbuf[0] = buflen - 4; |
658 |
if (buflen > req->cmd.xfer)
|
659 |
buflen = req->cmd.xfer; |
660 |
return buflen;
|
661 |
} |
662 |
|
663 |
static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf) |
664 |
{ |
665 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
666 |
int start_track, format, msf, toclen;
|
667 |
uint64_t nb_sectors; |
668 |
|
669 |
msf = req->cmd.buf[1] & 2; |
670 |
format = req->cmd.buf[2] & 0xf; |
671 |
start_track = req->cmd.buf[6];
|
672 |
bdrv_get_geometry(s->bs, &nb_sectors); |
673 |
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
674 |
nb_sectors /= s->cluster_size; |
675 |
switch (format) {
|
676 |
case 0: |
677 |
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); |
678 |
break;
|
679 |
case 1: |
680 |
/* multi session : only a single session defined */
|
681 |
toclen = 12;
|
682 |
memset(outbuf, 0, 12); |
683 |
outbuf[1] = 0x0a; |
684 |
outbuf[2] = 0x01; |
685 |
outbuf[3] = 0x01; |
686 |
break;
|
687 |
case 2: |
688 |
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); |
689 |
break;
|
690 |
default:
|
691 |
return -1; |
692 |
} |
693 |
if (toclen > req->cmd.xfer)
|
694 |
toclen = req->cmd.xfer; |
695 |
return toclen;
|
696 |
} |
697 |
|
698 |
static int scsi_disk_emulate_command(SCSIRequest *req, uint8_t *outbuf) |
699 |
{ |
700 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
701 |
uint64_t nb_sectors; |
702 |
int buflen = 0; |
703 |
|
704 |
switch (req->cmd.buf[0]) { |
705 |
case TEST_UNIT_READY:
|
706 |
if (!bdrv_is_inserted(s->bs))
|
707 |
goto not_ready;
|
708 |
break;
|
709 |
case REQUEST_SENSE:
|
710 |
if (req->cmd.xfer < 4) |
711 |
goto illegal_request;
|
712 |
memset(outbuf, 0, 4); |
713 |
buflen = 4;
|
714 |
if (req->dev->sense.key == NOT_READY && req->cmd.xfer >= 18) { |
715 |
memset(outbuf, 0, 18); |
716 |
buflen = 18;
|
717 |
outbuf[7] = 10; |
718 |
/* asc 0x3a, ascq 0: Medium not present */
|
719 |
outbuf[12] = 0x3a; |
720 |
outbuf[13] = 0; |
721 |
} |
722 |
outbuf[0] = 0xf0; |
723 |
outbuf[1] = 0; |
724 |
outbuf[2] = req->dev->sense.key;
|
725 |
scsi_dev_clear_sense(req->dev); |
726 |
break;
|
727 |
case INQUIRY:
|
728 |
buflen = scsi_disk_emulate_inquiry(req, outbuf); |
729 |
if (buflen < 0) |
730 |
goto illegal_request;
|
731 |
break;
|
732 |
case MODE_SENSE:
|
733 |
case MODE_SENSE_10:
|
734 |
buflen = scsi_disk_emulate_mode_sense(req, outbuf); |
735 |
if (buflen < 0) |
736 |
goto illegal_request;
|
737 |
break;
|
738 |
case READ_TOC:
|
739 |
buflen = scsi_disk_emulate_read_toc(req, outbuf); |
740 |
if (buflen < 0) |
741 |
goto illegal_request;
|
742 |
break;
|
743 |
case RESERVE:
|
744 |
if (req->cmd.buf[1] & 1) |
745 |
goto illegal_request;
|
746 |
break;
|
747 |
case RESERVE_10:
|
748 |
if (req->cmd.buf[1] & 3) |
749 |
goto illegal_request;
|
750 |
break;
|
751 |
case RELEASE:
|
752 |
if (req->cmd.buf[1] & 1) |
753 |
goto illegal_request;
|
754 |
break;
|
755 |
case RELEASE_10:
|
756 |
if (req->cmd.buf[1] & 3) |
757 |
goto illegal_request;
|
758 |
break;
|
759 |
case START_STOP:
|
760 |
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM && (req->cmd.buf[4] & 2)) { |
761 |
/* load/eject medium */
|
762 |
bdrv_eject(s->bs, !(req->cmd.buf[4] & 1)); |
763 |
} |
764 |
break;
|
765 |
case ALLOW_MEDIUM_REMOVAL:
|
766 |
bdrv_set_locked(s->bs, req->cmd.buf[4] & 1); |
767 |
break;
|
768 |
case READ_CAPACITY:
|
769 |
/* The normal LEN field for this command is zero. */
|
770 |
memset(outbuf, 0, 8); |
771 |
bdrv_get_geometry(s->bs, &nb_sectors); |
772 |
if (!nb_sectors)
|
773 |
goto not_ready;
|
774 |
nb_sectors /= s->cluster_size; |
775 |
/* Returned value is the address of the last sector. */
|
776 |
nb_sectors--; |
777 |
/* Remember the new size for read/write sanity checking. */
|
778 |
s->max_lba = nb_sectors; |
779 |
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
|
780 |
if (nb_sectors > UINT32_MAX)
|
781 |
nb_sectors = UINT32_MAX; |
782 |
outbuf[0] = (nb_sectors >> 24) & 0xff; |
783 |
outbuf[1] = (nb_sectors >> 16) & 0xff; |
784 |
outbuf[2] = (nb_sectors >> 8) & 0xff; |
785 |
outbuf[3] = nb_sectors & 0xff; |
786 |
outbuf[4] = 0; |
787 |
outbuf[5] = 0; |
788 |
outbuf[6] = s->cluster_size * 2; |
789 |
outbuf[7] = 0; |
790 |
buflen = 8;
|
791 |
break;
|
792 |
case SYNCHRONIZE_CACHE:
|
793 |
bdrv_flush(s->bs); |
794 |
break;
|
795 |
case GET_CONFIGURATION:
|
796 |
memset(outbuf, 0, 8); |
797 |
/* ??? This should probably return much more information. For now
|
798 |
just return the basic header indicating the CD-ROM profile. */
|
799 |
outbuf[7] = 8; // CD-ROM |
800 |
buflen = 8;
|
801 |
break;
|
802 |
case SERVICE_ACTION_IN:
|
803 |
/* Service Action In subcommands. */
|
804 |
if ((req->cmd.buf[1] & 31) == 0x10) { |
805 |
DPRINTF("SAI READ CAPACITY(16)\n");
|
806 |
memset(outbuf, 0, req->cmd.xfer);
|
807 |
bdrv_get_geometry(s->bs, &nb_sectors); |
808 |
if (!nb_sectors)
|
809 |
goto not_ready;
|
810 |
nb_sectors /= s->cluster_size; |
811 |
/* Returned value is the address of the last sector. */
|
812 |
nb_sectors--; |
813 |
/* Remember the new size for read/write sanity checking. */
|
814 |
s->max_lba = nb_sectors; |
815 |
outbuf[0] = (nb_sectors >> 56) & 0xff; |
816 |
outbuf[1] = (nb_sectors >> 48) & 0xff; |
817 |
outbuf[2] = (nb_sectors >> 40) & 0xff; |
818 |
outbuf[3] = (nb_sectors >> 32) & 0xff; |
819 |
outbuf[4] = (nb_sectors >> 24) & 0xff; |
820 |
outbuf[5] = (nb_sectors >> 16) & 0xff; |
821 |
outbuf[6] = (nb_sectors >> 8) & 0xff; |
822 |
outbuf[7] = nb_sectors & 0xff; |
823 |
outbuf[8] = 0; |
824 |
outbuf[9] = 0; |
825 |
outbuf[10] = s->cluster_size * 2; |
826 |
outbuf[11] = 0; |
827 |
outbuf[12] = 0; |
828 |
outbuf[13] = get_physical_block_exp(&s->qdev.conf);
|
829 |
/* Protection, exponent and lowest lba field left blank. */
|
830 |
buflen = req->cmd.xfer; |
831 |
break;
|
832 |
} |
833 |
DPRINTF("Unsupported Service Action In\n");
|
834 |
goto illegal_request;
|
835 |
case REPORT_LUNS:
|
836 |
if (req->cmd.xfer < 16) |
837 |
goto illegal_request;
|
838 |
memset(outbuf, 0, 16); |
839 |
outbuf[3] = 8; |
840 |
buflen = 16;
|
841 |
break;
|
842 |
case VERIFY:
|
843 |
break;
|
844 |
default:
|
845 |
goto illegal_request;
|
846 |
} |
847 |
scsi_req_set_status(req, GOOD, NO_SENSE); |
848 |
return buflen;
|
849 |
|
850 |
not_ready:
|
851 |
scsi_req_set_status(req, CHECK_CONDITION, NOT_READY); |
852 |
return 0; |
853 |
|
854 |
illegal_request:
|
855 |
scsi_req_set_status(req, CHECK_CONDITION, ILLEGAL_REQUEST); |
856 |
return 0; |
857 |
} |
858 |
|
859 |
/* Execute a scsi command. Returns the length of the data expected by the
|
860 |
command. This will be Positive for data transfers from the device
|
861 |
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
862 |
and zero if the command does not transfer any data. */
|
863 |
|
864 |
static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
|
865 |
uint8_t *buf, int lun)
|
866 |
{ |
867 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
868 |
uint64_t lba; |
869 |
uint32_t len; |
870 |
int cmdlen;
|
871 |
int is_write;
|
872 |
uint8_t command; |
873 |
uint8_t *outbuf; |
874 |
SCSIDiskReq *r; |
875 |
int rc;
|
876 |
|
877 |
command = buf[0];
|
878 |
r = scsi_find_request(s, tag); |
879 |
if (r) {
|
880 |
BADF("Tag 0x%x already in use\n", tag);
|
881 |
scsi_cancel_io(d, tag); |
882 |
} |
883 |
/* ??? Tags are not unique for different luns. We only implement a
|
884 |
single lun, so this should not matter. */
|
885 |
r = scsi_new_request(d, tag, lun); |
886 |
outbuf = (uint8_t *)r->iov.iov_base; |
887 |
is_write = 0;
|
888 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]); |
889 |
switch (command >> 5) { |
890 |
case 0: |
891 |
lba = (uint64_t) buf[3] | ((uint64_t) buf[2] << 8) | |
892 |
(((uint64_t) buf[1] & 0x1f) << 16); |
893 |
len = buf[4];
|
894 |
cmdlen = 6;
|
895 |
break;
|
896 |
case 1: |
897 |
case 2: |
898 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
899 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
900 |
len = buf[8] | (buf[7] << 8); |
901 |
cmdlen = 10;
|
902 |
break;
|
903 |
case 4: |
904 |
lba = (uint64_t) buf[9] | ((uint64_t) buf[8] << 8) | |
905 |
((uint64_t) buf[7] << 16) | ((uint64_t) buf[6] << 24) | |
906 |
((uint64_t) buf[5] << 32) | ((uint64_t) buf[4] << 40) | |
907 |
((uint64_t) buf[3] << 48) | ((uint64_t) buf[2] << 56); |
908 |
len = buf[13] | (buf[12] << 8) | (buf[11] << 16) | (buf[10] << 24); |
909 |
cmdlen = 16;
|
910 |
break;
|
911 |
case 5: |
912 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
913 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
914 |
len = buf[9] | (buf[8] << 8) | (buf[7] << 16) | (buf[6] << 24); |
915 |
cmdlen = 12;
|
916 |
break;
|
917 |
default:
|
918 |
BADF("Unsupported command length, command %x\n", command);
|
919 |
goto fail;
|
920 |
} |
921 |
#ifdef DEBUG_SCSI
|
922 |
{ |
923 |
int i;
|
924 |
for (i = 1; i < cmdlen; i++) { |
925 |
printf(" 0x%02x", buf[i]);
|
926 |
} |
927 |
printf("\n");
|
928 |
} |
929 |
#endif
|
930 |
|
931 |
if (scsi_req_parse(&r->req, buf) != 0) { |
932 |
BADF("Unsupported command length, command %x\n", command);
|
933 |
goto fail;
|
934 |
} |
935 |
assert(r->req.cmd.len == cmdlen); |
936 |
assert(r->req.cmd.lba == lba); |
937 |
|
938 |
if (lun || buf[1] >> 5) { |
939 |
/* Only LUN 0 supported. */
|
940 |
DPRINTF("Unimplemented LUN %d\n", lun ? lun : buf[1] >> 5); |
941 |
if (command != REQUEST_SENSE && command != INQUIRY)
|
942 |
goto fail;
|
943 |
} |
944 |
switch (command) {
|
945 |
case TEST_UNIT_READY:
|
946 |
case REQUEST_SENSE:
|
947 |
case INQUIRY:
|
948 |
case MODE_SENSE:
|
949 |
case MODE_SENSE_10:
|
950 |
case RESERVE:
|
951 |
case RESERVE_10:
|
952 |
case RELEASE:
|
953 |
case RELEASE_10:
|
954 |
case START_STOP:
|
955 |
case ALLOW_MEDIUM_REMOVAL:
|
956 |
case READ_CAPACITY:
|
957 |
case SYNCHRONIZE_CACHE:
|
958 |
case READ_TOC:
|
959 |
case GET_CONFIGURATION:
|
960 |
case SERVICE_ACTION_IN:
|
961 |
case REPORT_LUNS:
|
962 |
case VERIFY:
|
963 |
rc = scsi_disk_emulate_command(&r->req, outbuf); |
964 |
if (rc > 0) { |
965 |
r->iov.iov_len = rc; |
966 |
} else {
|
967 |
scsi_req_complete(&r->req); |
968 |
scsi_remove_request(r); |
969 |
return 0; |
970 |
} |
971 |
break;
|
972 |
case READ_6:
|
973 |
case READ_10:
|
974 |
case READ_12:
|
975 |
case READ_16:
|
976 |
DPRINTF("Read (sector %" PRId64 ", count %d)\n", lba, len); |
977 |
if (lba > s->max_lba)
|
978 |
goto illegal_lba;
|
979 |
r->sector = lba * s->cluster_size; |
980 |
r->sector_count = len * s->cluster_size; |
981 |
break;
|
982 |
case WRITE_6:
|
983 |
case WRITE_10:
|
984 |
case WRITE_12:
|
985 |
case WRITE_16:
|
986 |
DPRINTF("Write (sector %" PRId64 ", count %d)\n", lba, len); |
987 |
if (lba > s->max_lba)
|
988 |
goto illegal_lba;
|
989 |
r->sector = lba * s->cluster_size; |
990 |
r->sector_count = len * s->cluster_size; |
991 |
is_write = 1;
|
992 |
break;
|
993 |
default:
|
994 |
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
995 |
fail:
|
996 |
scsi_command_complete(r, CHECK_CONDITION, ILLEGAL_REQUEST); |
997 |
return 0; |
998 |
illegal_lba:
|
999 |
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
1000 |
return 0; |
1001 |
} |
1002 |
if (r->sector_count == 0 && r->iov.iov_len == 0) { |
1003 |
scsi_command_complete(r, GOOD, NO_SENSE); |
1004 |
} |
1005 |
len = r->sector_count * 512 + r->iov.iov_len;
|
1006 |
if (is_write) {
|
1007 |
return -len;
|
1008 |
} else {
|
1009 |
if (!r->sector_count)
|
1010 |
r->sector_count = -1;
|
1011 |
return len;
|
1012 |
} |
1013 |
} |
1014 |
|
1015 |
static void scsi_disk_purge_requests(SCSIDiskState *s) |
1016 |
{ |
1017 |
SCSIDiskReq *r; |
1018 |
|
1019 |
while (!QTAILQ_EMPTY(&s->qdev.requests)) {
|
1020 |
r = DO_UPCAST(SCSIDiskReq, req, QTAILQ_FIRST(&s->qdev.requests)); |
1021 |
if (r->req.aiocb) {
|
1022 |
bdrv_aio_cancel(r->req.aiocb); |
1023 |
} |
1024 |
scsi_remove_request(r); |
1025 |
} |
1026 |
} |
1027 |
|
1028 |
static void scsi_disk_reset(DeviceState *dev) |
1029 |
{ |
1030 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev); |
1031 |
uint64_t nb_sectors; |
1032 |
|
1033 |
scsi_disk_purge_requests(s); |
1034 |
|
1035 |
bdrv_get_geometry(s->bs, &nb_sectors); |
1036 |
nb_sectors /= s->cluster_size; |
1037 |
if (nb_sectors) {
|
1038 |
nb_sectors--; |
1039 |
} |
1040 |
s->max_lba = nb_sectors; |
1041 |
} |
1042 |
|
1043 |
static void scsi_destroy(SCSIDevice *dev) |
1044 |
{ |
1045 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
1046 |
|
1047 |
scsi_disk_purge_requests(s); |
1048 |
drive_uninit(s->qdev.conf.dinfo); |
1049 |
} |
1050 |
|
1051 |
static int scsi_disk_initfn(SCSIDevice *dev) |
1052 |
{ |
1053 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
1054 |
|
1055 |
if (!s->qdev.conf.dinfo || !s->qdev.conf.dinfo->bdrv) {
|
1056 |
error_report("scsi-disk: drive property not set");
|
1057 |
return -1; |
1058 |
} |
1059 |
s->bs = s->qdev.conf.dinfo->bdrv; |
1060 |
|
1061 |
if (bdrv_is_sg(s->bs)) {
|
1062 |
error_report("scsi-disk: unwanted /dev/sg*");
|
1063 |
return -1; |
1064 |
} |
1065 |
|
1066 |
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
|
1067 |
s->qdev.blocksize = 2048;
|
1068 |
} else {
|
1069 |
s->qdev.blocksize = s->qdev.conf.logical_block_size; |
1070 |
} |
1071 |
s->cluster_size = s->qdev.blocksize / 512;
|
1072 |
|
1073 |
s->qdev.type = TYPE_DISK; |
1074 |
qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s); |
1075 |
return 0; |
1076 |
} |
1077 |
|
1078 |
static SCSIDeviceInfo scsi_disk_info = {
|
1079 |
.qdev.name = "scsi-disk",
|
1080 |
.qdev.desc = "virtual scsi disk or cdrom",
|
1081 |
.qdev.size = sizeof(SCSIDiskState),
|
1082 |
.qdev.reset = scsi_disk_reset, |
1083 |
.init = scsi_disk_initfn, |
1084 |
.destroy = scsi_destroy, |
1085 |
.send_command = scsi_send_command, |
1086 |
.read_data = scsi_read_data, |
1087 |
.write_data = scsi_write_data, |
1088 |
.cancel_io = scsi_cancel_io, |
1089 |
.get_buf = scsi_get_buf, |
1090 |
.qdev.props = (Property[]) { |
1091 |
DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf), |
1092 |
DEFINE_PROP_STRING("ver", SCSIDiskState, version),
|
1093 |
DEFINE_PROP_END_OF_LIST(), |
1094 |
}, |
1095 |
}; |
1096 |
|
1097 |
static void scsi_disk_register_devices(void) |
1098 |
{ |
1099 |
scsi_qdev_register(&scsi_disk_info); |
1100 |
} |
1101 |
device_init(scsi_disk_register_devices) |