root / hw / scsi-disk.c @ 07a8de35
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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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*
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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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#include <qemu-common.h> |
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#include <sysemu.h> |
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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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|
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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 "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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/* 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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}; |
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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_free(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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|
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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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|
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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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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->qdev.dinfo->bdrv, 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 = |
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drive_get_on_error(s->qdev.dinfo->bdrv, 0);
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if (action == BLOCK_ERR_IGNORE)
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return 0; |
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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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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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} |
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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->qdev.dinfo->bdrv, 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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|
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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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|
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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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|
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if (!running)
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return;
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|
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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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|
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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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|
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static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf) |
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{
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BlockDriverState *bdrv = req->dev->dinfo->bdrv; |
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int buflen = 0; |
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|
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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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} |
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|
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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) { |
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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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} |
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|
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if (bdrv_get_type_hint(bdrv) == 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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|
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switch (page_code) {
|
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case 0x00: /* Supported page codes, mandatory */ |
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DPRINTF("Inquiry EVPD[Supported pages] "
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"buffer size %zd\n", req->cmd.xfer);
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outbuf[buflen++] = 3; // number of pages |
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outbuf[buflen++] = 0x00; // list of supported pages (this page) |
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outbuf[buflen++] = 0x80; // unit serial number |
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outbuf[buflen++] = 0x83; // device identification |
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break;
|
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|
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case 0x80: /* Device serial number, optional */ |
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{
|
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const char *serial = req->dev->dinfo->serial ? |
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req->dev->dinfo->serial : "0";
|
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int l = strlen(serial);
|
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|
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if (l > req->cmd.xfer)
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l = req->cmd.xfer; |
| 355 |
if (l > 20) |
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l = 20;
|
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|
| 358 |
DPRINTF("Inquiry EVPD[Serial number] "
|
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"buffer size %zd\n", req->cmd.xfer);
|
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outbuf[buflen++] = l; |
| 361 |
memcpy(outbuf+buflen, serial, l); |
| 362 |
buflen += l; |
| 363 |
break;
|
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} |
| 365 |
|
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case 0x83: /* Device identification page, mandatory */ |
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{
|
| 368 |
int max_len = 255 - 8; |
| 369 |
int id_len = strlen(bdrv_get_device_name(bdrv));
|
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|
| 371 |
if (id_len > max_len)
|
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id_len = max_len; |
| 373 |
DPRINTF("Inquiry EVPD[Device identification] "
|
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"buffer size %zd\n", req->cmd.xfer);
|
| 375 |
|
| 376 |
outbuf[buflen++] = 3 + id_len;
|
| 377 |
outbuf[buflen++] = 0x2; // ASCII |
| 378 |
outbuf[buflen++] = 0; // not officially assigned |
| 379 |
outbuf[buflen++] = 0; // reserved |
| 380 |
outbuf[buflen++] = id_len; // length of data following
|
| 381 |
|
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memcpy(outbuf+buflen, bdrv_get_device_name(bdrv), id_len); |
| 383 |
buflen += id_len; |
| 384 |
break;
|
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} |
| 386 |
default:
|
| 387 |
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
|
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"buffer size %zd\n", page_code, req->cmd.xfer);
|
| 389 |
return -1; |
| 390 |
} |
| 391 |
/* done with EVPD */
|
| 392 |
return buflen;
|
| 393 |
} |
| 394 |
|
| 395 |
/* Standard INQUIRY data */
|
| 396 |
if (req->cmd.buf[2] != 0) { |
| 397 |
BADF("Error: Inquiry (STANDARD) page or code "
|
| 398 |
"is non-zero [%02X]\n", req->cmd.buf[2]); |
| 399 |
return -1; |
| 400 |
} |
| 401 |
|
| 402 |
/* PAGE CODE == 0 */
|
| 403 |
if (req->cmd.xfer < 5) { |
| 404 |
BADF("Error: Inquiry (STANDARD) buffer size %zd "
|
| 405 |
"is less than 5\n", req->cmd.xfer);
|
| 406 |
return -1; |
| 407 |
} |
| 408 |
|
| 409 |
if (req->cmd.xfer < 36) { |
| 410 |
BADF("Error: Inquiry (STANDARD) buffer size %zd "
|
| 411 |
"is less than 36 (TODO: only 5 required)\n", req->cmd.xfer);
|
| 412 |
} |
| 413 |
|
| 414 |
buflen = req->cmd.xfer; |
| 415 |
if (buflen > SCSI_MAX_INQUIRY_LEN)
|
| 416 |
buflen = SCSI_MAX_INQUIRY_LEN; |
| 417 |
|
| 418 |
memset(outbuf, 0, buflen);
|
| 419 |
|
| 420 |
if (req->lun || req->cmd.buf[1] >> 5) { |
| 421 |
outbuf[0] = 0x7f; /* LUN not supported */ |
| 422 |
return buflen;
|
| 423 |
} |
| 424 |
|
| 425 |
if (bdrv_get_type_hint(bdrv) == BDRV_TYPE_CDROM) {
|
| 426 |
outbuf[0] = 5; |
| 427 |
outbuf[1] = 0x80; |
| 428 |
memcpy(&outbuf[16], "QEMU CD-ROM ", 16); |
| 429 |
} else {
|
| 430 |
outbuf[0] = 0; |
| 431 |
memcpy(&outbuf[16], "QEMU HARDDISK ", 16); |
| 432 |
} |
| 433 |
memcpy(&outbuf[8], "QEMU ", 8); |
| 434 |
memcpy(&outbuf[32], QEMU_VERSION, 4); |
| 435 |
/* Identify device as SCSI-3 rev 1.
|
| 436 |
Some later commands are also implemented. */
|
| 437 |
outbuf[2] = 3; |
| 438 |
outbuf[3] = 2; /* Format 2 */ |
| 439 |
outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */ |
| 440 |
/* Sync data transfer and TCQ. */
|
| 441 |
outbuf[7] = 0x10 | (req->bus->tcq ? 0x02 : 0); |
| 442 |
return buflen;
|
| 443 |
} |
| 444 |
|
| 445 |
static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p) |
| 446 |
{
|
| 447 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| 448 |
BlockDriverState *bdrv = req->dev->dinfo->bdrv; |
| 449 |
int cylinders, heads, secs;
|
| 450 |
|
| 451 |
switch (page) {
|
| 452 |
case 4: /* Rigid disk device geometry page. */ |
| 453 |
p[0] = 4; |
| 454 |
p[1] = 0x16; |
| 455 |
/* if a geometry hint is available, use it */
|
| 456 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
| 457 |
p[2] = (cylinders >> 16) & 0xff; |
| 458 |
p[3] = (cylinders >> 8) & 0xff; |
| 459 |
p[4] = cylinders & 0xff; |
| 460 |
p[5] = heads & 0xff; |
| 461 |
/* Write precomp start cylinder, disabled */
|
| 462 |
p[6] = (cylinders >> 16) & 0xff; |
| 463 |
p[7] = (cylinders >> 8) & 0xff; |
| 464 |
p[8] = cylinders & 0xff; |
| 465 |
/* Reduced current start cylinder, disabled */
|
| 466 |
p[9] = (cylinders >> 16) & 0xff; |
| 467 |
p[10] = (cylinders >> 8) & 0xff; |
| 468 |
p[11] = cylinders & 0xff; |
| 469 |
/* Device step rate [ns], 200ns */
|
| 470 |
p[12] = 0; |
| 471 |
p[13] = 200; |
| 472 |
/* Landing zone cylinder */
|
| 473 |
p[14] = 0xff; |
| 474 |
p[15] = 0xff; |
| 475 |
p[16] = 0xff; |
| 476 |
/* Medium rotation rate [rpm], 5400 rpm */
|
| 477 |
p[20] = (5400 >> 8) & 0xff; |
| 478 |
p[21] = 5400 & 0xff; |
| 479 |
return 0x16; |
| 480 |
|
| 481 |
case 5: /* Flexible disk device geometry page. */ |
| 482 |
p[0] = 5; |
| 483 |
p[1] = 0x1e; |
| 484 |
/* Transfer rate [kbit/s], 5Mbit/s */
|
| 485 |
p[2] = 5000 >> 8; |
| 486 |
p[3] = 5000 & 0xff; |
| 487 |
/* if a geometry hint is available, use it */
|
| 488 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
| 489 |
p[4] = heads & 0xff; |
| 490 |
p[5] = secs & 0xff; |
| 491 |
p[6] = s->cluster_size * 2; |
| 492 |
p[8] = (cylinders >> 8) & 0xff; |
| 493 |
p[9] = cylinders & 0xff; |
| 494 |
/* Write precomp start cylinder, disabled */
|
| 495 |
p[10] = (cylinders >> 8) & 0xff; |
| 496 |
p[11] = cylinders & 0xff; |
| 497 |
/* Reduced current start cylinder, disabled */
|
| 498 |
p[12] = (cylinders >> 8) & 0xff; |
| 499 |
p[13] = cylinders & 0xff; |
| 500 |
/* Device step rate [100us], 100us */
|
| 501 |
p[14] = 0; |
| 502 |
p[15] = 1; |
| 503 |
/* Device step pulse width [us], 1us */
|
| 504 |
p[16] = 1; |
| 505 |
/* Device head settle delay [100us], 100us */
|
| 506 |
p[17] = 0; |
| 507 |
p[18] = 1; |
| 508 |
/* Motor on delay [0.1s], 0.1s */
|
| 509 |
p[19] = 1; |
| 510 |
/* Motor off delay [0.1s], 0.1s */
|
| 511 |
p[20] = 1; |
| 512 |
/* Medium rotation rate [rpm], 5400 rpm */
|
| 513 |
p[28] = (5400 >> 8) & 0xff; |
| 514 |
p[29] = 5400 & 0xff; |
| 515 |
return 0x1e; |
| 516 |
|
| 517 |
case 8: /* Caching page. */ |
| 518 |
p[0] = 8; |
| 519 |
p[1] = 0x12; |
| 520 |
if (bdrv_enable_write_cache(s->qdev.dinfo->bdrv)) {
|
| 521 |
p[2] = 4; /* WCE */ |
| 522 |
} |
| 523 |
return 20; |
| 524 |
|
| 525 |
case 0x2a: /* CD Capabilities and Mechanical Status page. */ |
| 526 |
if (bdrv_get_type_hint(bdrv) != BDRV_TYPE_CDROM)
|
| 527 |
return 0; |
| 528 |
p[0] = 0x2a; |
| 529 |
p[1] = 0x14; |
| 530 |
p[2] = 3; // CD-R & CD-RW read |
| 531 |
p[3] = 0; // Writing not supported |
| 532 |
p[4] = 0x7f; /* Audio, composite, digital out, |
| 533 |
mode 2 form 1&2, multi session */
|
| 534 |
p[5] = 0xff; /* CD DA, DA accurate, RW supported, |
| 535 |
RW corrected, C2 errors, ISRC,
|
| 536 |
UPC, Bar code */
|
| 537 |
p[6] = 0x2d | (bdrv_is_locked(s->qdev.dinfo->bdrv)? 2 : 0); |
| 538 |
/* Locking supported, jumper present, eject, tray */
|
| 539 |
p[7] = 0; /* no volume & mute control, no |
| 540 |
changer */
|
| 541 |
p[8] = (50 * 176) >> 8; // 50x read speed |
| 542 |
p[9] = (50 * 176) & 0xff; |
| 543 |
p[10] = 0 >> 8; // No volume |
| 544 |
p[11] = 0 & 0xff; |
| 545 |
p[12] = 2048 >> 8; // 2M buffer |
| 546 |
p[13] = 2048 & 0xff; |
| 547 |
p[14] = (16 * 176) >> 8; // 16x read speed current |
| 548 |
p[15] = (16 * 176) & 0xff; |
| 549 |
p[18] = (16 * 176) >> 8; // 16x write speed |
| 550 |
p[19] = (16 * 176) & 0xff; |
| 551 |
p[20] = (16 * 176) >> 8; // 16x write speed current |
| 552 |
p[21] = (16 * 176) & 0xff; |
| 553 |
return 22; |
| 554 |
|
| 555 |
default:
|
| 556 |
return 0; |
| 557 |
} |
| 558 |
} |
| 559 |
|
| 560 |
static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf) |
| 561 |
{
|
| 562 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| 563 |
BlockDriverState *bdrv = req->dev->dinfo->bdrv; |
| 564 |
uint64_t nb_sectors; |
| 565 |
int page, dbd, buflen;
|
| 566 |
uint8_t *p; |
| 567 |
|
| 568 |
dbd = req->cmd.buf[1] & 0x8; |
| 569 |
page = req->cmd.buf[2] & 0x3f; |
| 570 |
DPRINTF("Mode Sense (page %d, len %zd)\n", page, req->cmd.xfer);
|
| 571 |
memset(outbuf, 0, req->cmd.xfer);
|
| 572 |
p = outbuf; |
| 573 |
|
| 574 |
p[1] = 0; /* Default media type. */ |
| 575 |
p[3] = 0; /* Block descriptor length. */ |
| 576 |
if (bdrv_get_type_hint(bdrv) == BDRV_TYPE_CDROM ||
|
| 577 |
bdrv_is_read_only(bdrv)) {
|
| 578 |
p[2] = 0x80; /* Readonly. */ |
| 579 |
} |
| 580 |
p += 4;
|
| 581 |
|
| 582 |
bdrv_get_geometry(bdrv, &nb_sectors); |
| 583 |
if ((~dbd) & nb_sectors) {
|
| 584 |
outbuf[3] = 8; /* Block descriptor length */ |
| 585 |
nb_sectors /= s->cluster_size; |
| 586 |
nb_sectors--; |
| 587 |
if (nb_sectors > 0xffffff) |
| 588 |
nb_sectors = 0xffffff;
|
| 589 |
p[0] = 0; /* media density code */ |
| 590 |
p[1] = (nb_sectors >> 16) & 0xff; |
| 591 |
p[2] = (nb_sectors >> 8) & 0xff; |
| 592 |
p[3] = nb_sectors & 0xff; |
| 593 |
p[4] = 0; /* reserved */ |
| 594 |
p[5] = 0; /* bytes 5-7 are the sector size in bytes */ |
| 595 |
p[6] = s->cluster_size * 2; |
| 596 |
p[7] = 0; |
| 597 |
p += 8;
|
| 598 |
} |
| 599 |
|
| 600 |
switch (page) {
|
| 601 |
case 0x04: |
| 602 |
case 0x05: |
| 603 |
case 0x08: |
| 604 |
case 0x2a: |
| 605 |
p += mode_sense_page(req, page, p); |
| 606 |
break;
|
| 607 |
case 0x3f: |
| 608 |
p += mode_sense_page(req, 0x08, p);
|
| 609 |
p += mode_sense_page(req, 0x2a, p);
|
| 610 |
break;
|
| 611 |
} |
| 612 |
|
| 613 |
buflen = p - outbuf; |
| 614 |
outbuf[0] = buflen - 4; |
| 615 |
if (buflen > req->cmd.xfer)
|
| 616 |
buflen = req->cmd.xfer; |
| 617 |
return buflen;
|
| 618 |
} |
| 619 |
|
| 620 |
static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf) |
| 621 |
{
|
| 622 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| 623 |
BlockDriverState *bdrv = req->dev->dinfo->bdrv; |
| 624 |
int start_track, format, msf, toclen;
|
| 625 |
uint64_t nb_sectors; |
| 626 |
|
| 627 |
msf = req->cmd.buf[1] & 2; |
| 628 |
format = req->cmd.buf[2] & 0xf; |
| 629 |
start_track = req->cmd.buf[6];
|
| 630 |
bdrv_get_geometry(bdrv, &nb_sectors); |
| 631 |
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
| 632 |
nb_sectors /= s->cluster_size; |
| 633 |
switch (format) {
|
| 634 |
case 0: |
| 635 |
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); |
| 636 |
break;
|
| 637 |
case 1: |
| 638 |
/* multi session : only a single session defined */
|
| 639 |
toclen = 12;
|
| 640 |
memset(outbuf, 0, 12); |
| 641 |
outbuf[1] = 0x0a; |
| 642 |
outbuf[2] = 0x01; |
| 643 |
outbuf[3] = 0x01; |
| 644 |
break;
|
| 645 |
case 2: |
| 646 |
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); |
| 647 |
break;
|
| 648 |
default:
|
| 649 |
return -1; |
| 650 |
} |
| 651 |
if (toclen > req->cmd.xfer)
|
| 652 |
toclen = req->cmd.xfer; |
| 653 |
return toclen;
|
| 654 |
} |
| 655 |
|
| 656 |
static int scsi_disk_emulate_command(SCSIRequest *req, uint8_t *outbuf) |
| 657 |
{
|
| 658 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| 659 |
BlockDriverState *bdrv = req->dev->dinfo->bdrv; |
| 660 |
uint64_t nb_sectors; |
| 661 |
int buflen = 0; |
| 662 |
|
| 663 |
switch (req->cmd.buf[0]) { |
| 664 |
case TEST_UNIT_READY:
|
| 665 |
if (!bdrv_is_inserted(bdrv))
|
| 666 |
goto not_ready;
|
| 667 |
break;
|
| 668 |
case REQUEST_SENSE:
|
| 669 |
if (req->cmd.xfer < 4) |
| 670 |
goto illegal_request;
|
| 671 |
memset(outbuf, 0, 4); |
| 672 |
buflen = 4;
|
| 673 |
if (req->dev->sense.key == NOT_READY && req->cmd.xfer >= 18) { |
| 674 |
memset(outbuf, 0, 18); |
| 675 |
buflen = 18;
|
| 676 |
outbuf[7] = 10; |
| 677 |
/* asc 0x3a, ascq 0: Medium not present */
|
| 678 |
outbuf[12] = 0x3a; |
| 679 |
outbuf[13] = 0; |
| 680 |
} |
| 681 |
outbuf[0] = 0xf0; |
| 682 |
outbuf[1] = 0; |
| 683 |
outbuf[2] = req->dev->sense.key;
|
| 684 |
scsi_dev_clear_sense(req->dev); |
| 685 |
break;
|
| 686 |
case INQUIRY:
|
| 687 |
buflen = scsi_disk_emulate_inquiry(req, outbuf); |
| 688 |
if (buflen < 0) |
| 689 |
goto illegal_request;
|
| 690 |
break;
|
| 691 |
case MODE_SENSE:
|
| 692 |
case MODE_SENSE_10:
|
| 693 |
buflen = scsi_disk_emulate_mode_sense(req, outbuf); |
| 694 |
if (buflen < 0) |
| 695 |
goto illegal_request;
|
| 696 |
break;
|
| 697 |
case READ_TOC:
|
| 698 |
buflen = scsi_disk_emulate_read_toc(req, outbuf); |
| 699 |
if (buflen < 0) |
| 700 |
goto illegal_request;
|
| 701 |
break;
|
| 702 |
case RESERVE:
|
| 703 |
if (req->cmd.buf[1] & 1) |
| 704 |
goto illegal_request;
|
| 705 |
break;
|
| 706 |
case RESERVE_10:
|
| 707 |
if (req->cmd.buf[1] & 3) |
| 708 |
goto illegal_request;
|
| 709 |
break;
|
| 710 |
case RELEASE:
|
| 711 |
if (req->cmd.buf[1] & 1) |
| 712 |
goto illegal_request;
|
| 713 |
break;
|
| 714 |
case RELEASE_10:
|
| 715 |
if (req->cmd.buf[1] & 3) |
| 716 |
goto illegal_request;
|
| 717 |
break;
|
| 718 |
case START_STOP:
|
| 719 |
if (bdrv_get_type_hint(bdrv) == BDRV_TYPE_CDROM && (req->cmd.buf[4] & 2)) { |
| 720 |
/* load/eject medium */
|
| 721 |
bdrv_eject(bdrv, !(req->cmd.buf[4] & 1)); |
| 722 |
} |
| 723 |
break;
|
| 724 |
case ALLOW_MEDIUM_REMOVAL:
|
| 725 |
bdrv_set_locked(bdrv, req->cmd.buf[4] & 1); |
| 726 |
break;
|
| 727 |
case READ_CAPACITY:
|
| 728 |
/* The normal LEN field for this command is zero. */
|
| 729 |
memset(outbuf, 0, 8); |
| 730 |
bdrv_get_geometry(bdrv, &nb_sectors); |
| 731 |
if (!nb_sectors)
|
| 732 |
goto not_ready;
|
| 733 |
nb_sectors /= s->cluster_size; |
| 734 |
/* Returned value is the address of the last sector. */
|
| 735 |
nb_sectors--; |
| 736 |
/* Remember the new size for read/write sanity checking. */
|
| 737 |
s->max_lba = nb_sectors; |
| 738 |
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
|
| 739 |
if (nb_sectors > UINT32_MAX)
|
| 740 |
nb_sectors = UINT32_MAX; |
| 741 |
outbuf[0] = (nb_sectors >> 24) & 0xff; |
| 742 |
outbuf[1] = (nb_sectors >> 16) & 0xff; |
| 743 |
outbuf[2] = (nb_sectors >> 8) & 0xff; |
| 744 |
outbuf[3] = nb_sectors & 0xff; |
| 745 |
outbuf[4] = 0; |
| 746 |
outbuf[5] = 0; |
| 747 |
outbuf[6] = s->cluster_size * 2; |
| 748 |
outbuf[7] = 0; |
| 749 |
buflen = 8;
|
| 750 |
break;
|
| 751 |
case SYNCHRONIZE_CACHE:
|
| 752 |
bdrv_flush(bdrv); |
| 753 |
break;
|
| 754 |
case GET_CONFIGURATION:
|
| 755 |
memset(outbuf, 0, 8); |
| 756 |
/* ??? This should probably return much more information. For now
|
| 757 |
just return the basic header indicating the CD-ROM profile. */
|
| 758 |
outbuf[7] = 8; // CD-ROM |
| 759 |
buflen = 8;
|
| 760 |
break;
|
| 761 |
case SERVICE_ACTION_IN:
|
| 762 |
/* Service Action In subcommands. */
|
| 763 |
if ((req->cmd.buf[1] & 31) == 0x10) { |
| 764 |
DPRINTF("SAI READ CAPACITY(16)\n");
|
| 765 |
memset(outbuf, 0, req->cmd.xfer);
|
| 766 |
bdrv_get_geometry(bdrv, &nb_sectors); |
| 767 |
if (!nb_sectors)
|
| 768 |
goto not_ready;
|
| 769 |
nb_sectors /= s->cluster_size; |
| 770 |
/* Returned value is the address of the last sector. */
|
| 771 |
nb_sectors--; |
| 772 |
/* Remember the new size for read/write sanity checking. */
|
| 773 |
s->max_lba = nb_sectors; |
| 774 |
outbuf[0] = (nb_sectors >> 56) & 0xff; |
| 775 |
outbuf[1] = (nb_sectors >> 48) & 0xff; |
| 776 |
outbuf[2] = (nb_sectors >> 40) & 0xff; |
| 777 |
outbuf[3] = (nb_sectors >> 32) & 0xff; |
| 778 |
outbuf[4] = (nb_sectors >> 24) & 0xff; |
| 779 |
outbuf[5] = (nb_sectors >> 16) & 0xff; |
| 780 |
outbuf[6] = (nb_sectors >> 8) & 0xff; |
| 781 |
outbuf[7] = nb_sectors & 0xff; |
| 782 |
outbuf[8] = 0; |
| 783 |
outbuf[9] = 0; |
| 784 |
outbuf[10] = s->cluster_size * 2; |
| 785 |
outbuf[11] = 0; |
| 786 |
/* Protection, exponent and lowest lba field left blank. */
|
| 787 |
buflen = req->cmd.xfer; |
| 788 |
break;
|
| 789 |
} |
| 790 |
DPRINTF("Unsupported Service Action In\n");
|
| 791 |
goto illegal_request;
|
| 792 |
case REPORT_LUNS:
|
| 793 |
if (req->cmd.xfer < 16) |
| 794 |
goto illegal_request;
|
| 795 |
memset(outbuf, 0, 16); |
| 796 |
outbuf[3] = 8; |
| 797 |
buflen = 16;
|
| 798 |
break;
|
| 799 |
case VERIFY:
|
| 800 |
break;
|
| 801 |
default:
|
| 802 |
goto illegal_request;
|
| 803 |
} |
| 804 |
scsi_req_set_status(req, GOOD, NO_SENSE); |
| 805 |
return buflen;
|
| 806 |
|
| 807 |
not_ready:
|
| 808 |
scsi_req_set_status(req, CHECK_CONDITION, NOT_READY); |
| 809 |
return 0; |
| 810 |
|
| 811 |
illegal_request:
|
| 812 |
scsi_req_set_status(req, CHECK_CONDITION, ILLEGAL_REQUEST); |
| 813 |
return 0; |
| 814 |
} |
| 815 |
|
| 816 |
/* Execute a scsi command. Returns the length of the data expected by the
|
| 817 |
command. This will be Positive for data transfers from the device
|
| 818 |
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
| 819 |
and zero if the command does not transfer any data. */
|
| 820 |
|
| 821 |
static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
|
| 822 |
uint8_t *buf, int lun)
|
| 823 |
{
|
| 824 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
| 825 |
uint64_t lba; |
| 826 |
uint32_t len; |
| 827 |
int cmdlen;
|
| 828 |
int is_write;
|
| 829 |
uint8_t command; |
| 830 |
uint8_t *outbuf; |
| 831 |
SCSIDiskReq *r; |
| 832 |
int rc;
|
| 833 |
|
| 834 |
command = buf[0];
|
| 835 |
r = scsi_find_request(s, tag); |
| 836 |
if (r) {
|
| 837 |
BADF("Tag 0x%x already in use\n", tag);
|
| 838 |
scsi_cancel_io(d, tag); |
| 839 |
} |
| 840 |
/* ??? Tags are not unique for different luns. We only implement a
|
| 841 |
single lun, so this should not matter. */
|
| 842 |
r = scsi_new_request(d, tag, lun); |
| 843 |
outbuf = (uint8_t *)r->iov.iov_base; |
| 844 |
is_write = 0;
|
| 845 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]); |
| 846 |
switch (command >> 5) { |
| 847 |
case 0: |
| 848 |
lba = (uint64_t) buf[3] | ((uint64_t) buf[2] << 8) | |
| 849 |
(((uint64_t) buf[1] & 0x1f) << 16); |
| 850 |
len = buf[4];
|
| 851 |
cmdlen = 6;
|
| 852 |
break;
|
| 853 |
case 1: |
| 854 |
case 2: |
| 855 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
| 856 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
| 857 |
len = buf[8] | (buf[7] << 8); |
| 858 |
cmdlen = 10;
|
| 859 |
break;
|
| 860 |
case 4: |
| 861 |
lba = (uint64_t) buf[9] | ((uint64_t) buf[8] << 8) | |
| 862 |
((uint64_t) buf[7] << 16) | ((uint64_t) buf[6] << 24) | |
| 863 |
((uint64_t) buf[5] << 32) | ((uint64_t) buf[4] << 40) | |
| 864 |
((uint64_t) buf[3] << 48) | ((uint64_t) buf[2] << 56); |
| 865 |
len = buf[13] | (buf[12] << 8) | (buf[11] << 16) | (buf[10] << 24); |
| 866 |
cmdlen = 16;
|
| 867 |
break;
|
| 868 |
case 5: |
| 869 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
| 870 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
| 871 |
len = buf[9] | (buf[8] << 8) | (buf[7] << 16) | (buf[6] << 24); |
| 872 |
cmdlen = 12;
|
| 873 |
break;
|
| 874 |
default:
|
| 875 |
BADF("Unsupported command length, command %x\n", command);
|
| 876 |
goto fail;
|
| 877 |
} |
| 878 |
#ifdef DEBUG_SCSI
|
| 879 |
{
|
| 880 |
int i;
|
| 881 |
for (i = 1; i < cmdlen; i++) { |
| 882 |
printf(" 0x%02x", buf[i]);
|
| 883 |
} |
| 884 |
printf("\n");
|
| 885 |
} |
| 886 |
#endif
|
| 887 |
|
| 888 |
if (scsi_req_parse(&r->req, buf) != 0) { |
| 889 |
BADF("Unsupported command length, command %x\n", command);
|
| 890 |
goto fail;
|
| 891 |
} |
| 892 |
assert(r->req.cmd.len == cmdlen); |
| 893 |
assert(r->req.cmd.lba == lba); |
| 894 |
|
| 895 |
if (lun || buf[1] >> 5) { |
| 896 |
/* Only LUN 0 supported. */
|
| 897 |
DPRINTF("Unimplemented LUN %d\n", lun ? lun : buf[1] >> 5); |
| 898 |
if (command != REQUEST_SENSE && command != INQUIRY)
|
| 899 |
goto fail;
|
| 900 |
} |
| 901 |
switch (command) {
|
| 902 |
case TEST_UNIT_READY:
|
| 903 |
case REQUEST_SENSE:
|
| 904 |
case INQUIRY:
|
| 905 |
case MODE_SENSE:
|
| 906 |
case MODE_SENSE_10:
|
| 907 |
case RESERVE:
|
| 908 |
case RESERVE_10:
|
| 909 |
case RELEASE:
|
| 910 |
case RELEASE_10:
|
| 911 |
case START_STOP:
|
| 912 |
case ALLOW_MEDIUM_REMOVAL:
|
| 913 |
case READ_CAPACITY:
|
| 914 |
case SYNCHRONIZE_CACHE:
|
| 915 |
case READ_TOC:
|
| 916 |
case GET_CONFIGURATION:
|
| 917 |
case SERVICE_ACTION_IN:
|
| 918 |
case REPORT_LUNS:
|
| 919 |
case VERIFY:
|
| 920 |
rc = scsi_disk_emulate_command(&r->req, outbuf); |
| 921 |
if (rc > 0) { |
| 922 |
r->iov.iov_len = rc; |
| 923 |
} else {
|
| 924 |
scsi_req_complete(&r->req); |
| 925 |
scsi_remove_request(r); |
| 926 |
return 0; |
| 927 |
} |
| 928 |
break;
|
| 929 |
case READ_6:
|
| 930 |
case READ_10:
|
| 931 |
case READ_12:
|
| 932 |
case READ_16:
|
| 933 |
DPRINTF("Read (sector %" PRId64 ", count %d)\n", lba, len); |
| 934 |
if (lba > s->max_lba)
|
| 935 |
goto illegal_lba;
|
| 936 |
r->sector = lba * s->cluster_size; |
| 937 |
r->sector_count = len * s->cluster_size; |
| 938 |
break;
|
| 939 |
case WRITE_6:
|
| 940 |
case WRITE_10:
|
| 941 |
case WRITE_12:
|
| 942 |
case WRITE_16:
|
| 943 |
DPRINTF("Write (sector %" PRId64 ", count %d)\n", lba, len); |
| 944 |
if (lba > s->max_lba)
|
| 945 |
goto illegal_lba;
|
| 946 |
r->sector = lba * s->cluster_size; |
| 947 |
r->sector_count = len * s->cluster_size; |
| 948 |
is_write = 1;
|
| 949 |
break;
|
| 950 |
default:
|
| 951 |
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
| 952 |
fail:
|
| 953 |
scsi_command_complete(r, CHECK_CONDITION, ILLEGAL_REQUEST); |
| 954 |
return 0; |
| 955 |
illegal_lba:
|
| 956 |
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
| 957 |
return 0; |
| 958 |
} |
| 959 |
if (r->sector_count == 0 && r->iov.iov_len == 0) { |
| 960 |
scsi_command_complete(r, GOOD, NO_SENSE); |
| 961 |
} |
| 962 |
len = r->sector_count * 512 + r->iov.iov_len;
|
| 963 |
if (is_write) {
|
| 964 |
return -len;
|
| 965 |
} else {
|
| 966 |
if (!r->sector_count)
|
| 967 |
r->sector_count = -1;
|
| 968 |
return len;
|
| 969 |
} |
| 970 |
} |
| 971 |
|
| 972 |
static void scsi_destroy(SCSIDevice *dev) |
| 973 |
{
|
| 974 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
| 975 |
SCSIDiskReq *r; |
| 976 |
|
| 977 |
while (!QTAILQ_EMPTY(&s->qdev.requests)) {
|
| 978 |
r = DO_UPCAST(SCSIDiskReq, req, QTAILQ_FIRST(&s->qdev.requests)); |
| 979 |
scsi_remove_request(r); |
| 980 |
} |
| 981 |
drive_uninit(s->qdev.dinfo); |
| 982 |
} |
| 983 |
|
| 984 |
static int scsi_disk_initfn(SCSIDevice *dev) |
| 985 |
{
|
| 986 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
| 987 |
uint64_t nb_sectors; |
| 988 |
|
| 989 |
if (!s->qdev.dinfo || !s->qdev.dinfo->bdrv) {
|
| 990 |
qemu_error("scsi-disk: drive property not set\n");
|
| 991 |
return -1; |
| 992 |
} |
| 993 |
|
| 994 |
if (bdrv_get_type_hint(s->qdev.dinfo->bdrv) == BDRV_TYPE_CDROM) {
|
| 995 |
s->cluster_size = 4;
|
| 996 |
} else {
|
| 997 |
s->cluster_size = 1;
|
| 998 |
} |
| 999 |
s->qdev.blocksize = 512 * s->cluster_size;
|
| 1000 |
s->qdev.type = TYPE_DISK; |
| 1001 |
bdrv_get_geometry(s->qdev.dinfo->bdrv, &nb_sectors); |
| 1002 |
nb_sectors /= s->cluster_size; |
| 1003 |
if (nb_sectors)
|
| 1004 |
nb_sectors--; |
| 1005 |
s->max_lba = nb_sectors; |
| 1006 |
qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s); |
| 1007 |
return 0; |
| 1008 |
} |
| 1009 |
|
| 1010 |
static SCSIDeviceInfo scsi_disk_info = {
|
| 1011 |
.qdev.name = "scsi-disk",
|
| 1012 |
.qdev.desc = "virtual scsi disk or cdrom",
|
| 1013 |
.qdev.size = sizeof(SCSIDiskState),
|
| 1014 |
.init = scsi_disk_initfn, |
| 1015 |
.destroy = scsi_destroy, |
| 1016 |
.send_command = scsi_send_command, |
| 1017 |
.read_data = scsi_read_data, |
| 1018 |
.write_data = scsi_write_data, |
| 1019 |
.cancel_io = scsi_cancel_io, |
| 1020 |
.get_buf = scsi_get_buf, |
| 1021 |
.qdev.props = (Property[]) {
|
| 1022 |
DEFINE_PROP_DRIVE("drive", SCSIDiskState, qdev.dinfo),
|
| 1023 |
DEFINE_PROP_END_OF_LIST(), |
| 1024 |
}, |
| 1025 |
}; |
| 1026 |
|
| 1027 |
static void scsi_disk_register_devices(void) |
| 1028 |
{
|
| 1029 |
scsi_qdev_register(&scsi_disk_info); |
| 1030 |
} |
| 1031 |
device_init(scsi_disk_register_devices) |