root / hw / scsi-disk.c @ 563e3c6e
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/*
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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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//#define DEBUG_SCSI
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|
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#ifdef DEBUG_SCSI
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#define DPRINTF(fmt, args...) \
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do { printf("scsi-disk: " fmt , ##args); } while (0) |
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#else
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#define DPRINTF(fmt, args...) do {} while(0) |
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#endif
|
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|
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#define BADF(fmt, args...) \
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do { fprintf(stderr, "scsi-disk: " fmt , ##args); } while (0) |
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|
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#include "qemu-common.h" |
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#include "block.h" |
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#include "scsi-disk.h" |
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|
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#define SENSE_NO_SENSE 0 |
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#define SENSE_NOT_READY 2 |
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#define SENSE_HARDWARE_ERROR 4 |
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#define SENSE_ILLEGAL_REQUEST 5 |
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|
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#define SCSI_DMA_BUF_SIZE 65536 |
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typedef struct SCSIRequest { |
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SCSIDeviceState *dev; |
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uint32_t tag; |
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/* ??? We should probably keep track of whether the data trasfer 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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int sector;
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int sector_count;
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/* The amounnt of data in the buffer. */
|
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int buf_len;
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uint8_t *dma_buf; |
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BlockDriverAIOCB *aiocb; |
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struct SCSIRequest *next;
|
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} SCSIRequest; |
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|
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struct SCSIDeviceState
|
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{
|
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BlockDriverState *bdrv; |
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SCSIRequest *requests; |
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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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int sense;
|
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int tcq;
|
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/* Completion functions may be called from either scsi_{read,write}_data
|
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or from the AIO completion routines. */
|
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scsi_completionfn completion; |
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void *opaque;
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}; |
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|
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/* Global pool of SCSIRequest structures. */
|
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static SCSIRequest *free_requests = NULL; |
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|
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static SCSIRequest *scsi_new_request(SCSIDeviceState *s, uint32_t tag)
|
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{
|
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SCSIRequest *r; |
| 75 |
|
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if (free_requests) {
|
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r = free_requests; |
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free_requests = r->next; |
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} else {
|
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r = qemu_malloc(sizeof(SCSIRequest));
|
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r->dma_buf = qemu_memalign(512, SCSI_DMA_BUF_SIZE);
|
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} |
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r->dev = s; |
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r->tag = tag; |
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r->sector_count = 0;
|
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r->buf_len = 0;
|
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r->aiocb = NULL;
|
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|
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r->next = s->requests; |
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s->requests = r; |
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return r;
|
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} |
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|
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static void scsi_remove_request(SCSIRequest *r) |
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{
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SCSIRequest *last; |
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SCSIDeviceState *s = r->dev; |
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|
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if (s->requests == r) {
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s->requests = r->next; |
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} else {
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last = s->requests; |
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while (last && last->next != r)
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last = last->next; |
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if (last) {
|
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last->next = r->next; |
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} else {
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BADF("Orphaned request\n");
|
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} |
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} |
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r->next = free_requests; |
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free_requests = r; |
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} |
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|
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static SCSIRequest *scsi_find_request(SCSIDeviceState *s, uint32_t tag)
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{
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SCSIRequest *r; |
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|
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r = s->requests; |
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while (r && r->tag != tag)
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r = r->next; |
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|
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return r;
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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(SCSIRequest *r, int sense) |
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{
|
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SCSIDeviceState *s = r->dev; |
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uint32_t tag; |
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DPRINTF("Command complete tag=0x%x sense=%d\n", r->tag, sense);
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s->sense = sense; |
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tag = r->tag; |
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scsi_remove_request(r); |
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s->completion(s->opaque, SCSI_REASON_DONE, tag, sense); |
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} |
| 137 |
|
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/* Cancel a pending data transfer. */
|
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static void scsi_cancel_io(SCSIDevice *d, uint32_t tag) |
| 140 |
{
|
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SCSIDeviceState *s = d->state; |
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SCSIRequest *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->aiocb)
|
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bdrv_aio_cancel(r->aiocb); |
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r->aiocb = NULL;
|
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scsi_remove_request(r); |
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} |
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} |
| 152 |
|
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static void scsi_read_complete(void * opaque, int ret) |
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{
|
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SCSIRequest *r = (SCSIRequest *)opaque; |
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SCSIDeviceState *s = r->dev; |
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|
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if (ret) {
|
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DPRINTF("IO error\n");
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scsi_command_complete(r, SENSE_HARDWARE_ERROR); |
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return;
|
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} |
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DPRINTF("Data ready tag=0x%x len=%d\n", r->tag, r->buf_len);
|
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|
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s->completion(s->opaque, SCSI_REASON_DATA, r->tag, r->buf_len); |
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} |
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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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SCSIDeviceState *s = d->state; |
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SCSIRequest *r; |
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uint32_t n; |
| 174 |
|
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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, SENSE_HARDWARE_ERROR); |
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return;
|
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} |
| 182 |
if (r->sector_count == (uint32_t)-1) { |
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DPRINTF("Read buf_len=%d\n", r->buf_len);
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r->sector_count = 0;
|
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s->completion(s->opaque, SCSI_REASON_DATA, r->tag, r->buf_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, SENSE_NO_SENSE); |
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return;
|
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} |
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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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|
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r->buf_len = n * 512;
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r->aiocb = bdrv_aio_read(s->bdrv, r->sector, r->dma_buf, n, |
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scsi_read_complete, r); |
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if (r->aiocb == NULL) |
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scsi_command_complete(r, SENSE_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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|
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static void scsi_write_complete(void * opaque, int ret) |
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{
|
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SCSIRequest *r = (SCSIRequest *)opaque; |
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SCSIDeviceState *s = r->dev; |
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uint32_t len; |
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|
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if (ret) {
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fprintf(stderr, "scsi-disc: IO write error\n");
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exit(1);
|
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} |
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|
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r->aiocb = NULL;
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if (r->sector_count == 0) { |
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scsi_command_complete(r, SENSE_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->buf_len = len; |
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DPRINTF("Write complete tag=0x%x more=%d\n", r->tag, len);
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s->completion(s->opaque, SCSI_REASON_DATA, r->tag, len); |
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} |
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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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SCSIDeviceState *s = d->state; |
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SCSIRequest *r; |
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uint32_t n; |
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|
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DPRINTF("Write data tag=0x%x\n", tag);
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r = scsi_find_request(s, tag); |
| 242 |
if (!r) {
|
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BADF("Bad write tag 0x%x\n", tag);
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scsi_command_complete(r, SENSE_HARDWARE_ERROR); |
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return 1; |
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} |
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if (r->aiocb)
|
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BADF("Data transfer already in progress\n");
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n = r->buf_len / 512;
|
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if (n) {
|
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r->aiocb = bdrv_aio_write(s->bdrv, r->sector, r->dma_buf, n, |
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scsi_write_complete, r); |
| 253 |
if (r->aiocb == NULL) |
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scsi_command_complete(r, SENSE_HARDWARE_ERROR); |
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r->sector += n; |
| 256 |
r->sector_count -= n; |
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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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return 0; |
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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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SCSIDeviceState *s = d->state; |
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SCSIRequest *r; |
| 270 |
|
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r = scsi_find_request(s, tag); |
| 272 |
if (!r) {
|
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BADF("Bad buffer tag 0x%x\n", tag);
|
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return NULL; |
| 275 |
} |
| 276 |
return r->dma_buf;
|
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} |
| 278 |
|
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/* Execute a scsi command. Returns the length of the data expected by the
|
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command. This will be Positive for data transfers from the device
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(eg. disk reads), negative for transfers to the device (eg. disk writes),
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and zero if the command does not transfer any data. */
|
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|
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static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
|
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uint8_t *buf, int lun)
|
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{
|
| 287 |
SCSIDeviceState *s = d->state; |
| 288 |
uint64_t nb_sectors; |
| 289 |
uint32_t lba; |
| 290 |
uint32_t len; |
| 291 |
int cmdlen;
|
| 292 |
int is_write;
|
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uint8_t command; |
| 294 |
uint8_t *outbuf; |
| 295 |
SCSIRequest *r; |
| 296 |
|
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command = buf[0];
|
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r = scsi_find_request(s, tag); |
| 299 |
if (r) {
|
| 300 |
BADF("Tag 0x%x already in use\n", tag);
|
| 301 |
scsi_cancel_io(d, tag); |
| 302 |
} |
| 303 |
/* ??? Tags are not unique for different luns. We only implement a
|
| 304 |
single lun, so this should not matter. */
|
| 305 |
r = scsi_new_request(s, tag); |
| 306 |
outbuf = r->dma_buf; |
| 307 |
is_write = 0;
|
| 308 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]); |
| 309 |
switch (command >> 5) { |
| 310 |
case 0: |
| 311 |
lba = buf[3] | (buf[2] << 8) | ((buf[1] & 0x1f) << 16); |
| 312 |
len = buf[4];
|
| 313 |
cmdlen = 6;
|
| 314 |
break;
|
| 315 |
case 1: |
| 316 |
case 2: |
| 317 |
lba = buf[5] | (buf[4] << 8) | (buf[3] << 16) | (buf[2] << 24); |
| 318 |
len = buf[8] | (buf[7] << 8); |
| 319 |
cmdlen = 10;
|
| 320 |
break;
|
| 321 |
case 4: |
| 322 |
lba = buf[5] | (buf[4] << 8) | (buf[3] << 16) | (buf[2] << 24); |
| 323 |
len = buf[13] | (buf[12] << 8) | (buf[11] << 16) | (buf[10] << 24); |
| 324 |
cmdlen = 16;
|
| 325 |
break;
|
| 326 |
case 5: |
| 327 |
lba = buf[5] | (buf[4] << 8) | (buf[3] << 16) | (buf[2] << 24); |
| 328 |
len = buf[9] | (buf[8] << 8) | (buf[7] << 16) | (buf[6] << 24); |
| 329 |
cmdlen = 12;
|
| 330 |
break;
|
| 331 |
default:
|
| 332 |
BADF("Unsupported command length, command %x\n", command);
|
| 333 |
goto fail;
|
| 334 |
} |
| 335 |
#ifdef DEBUG_SCSI
|
| 336 |
{
|
| 337 |
int i;
|
| 338 |
for (i = 1; i < cmdlen; i++) { |
| 339 |
printf(" 0x%02x", buf[i]);
|
| 340 |
} |
| 341 |
printf("\n");
|
| 342 |
} |
| 343 |
#endif
|
| 344 |
if (lun || buf[1] >> 5) { |
| 345 |
/* Only LUN 0 supported. */
|
| 346 |
DPRINTF("Unimplemented LUN %d\n", lun ? lun : buf[1] >> 5); |
| 347 |
goto fail;
|
| 348 |
} |
| 349 |
switch (command) {
|
| 350 |
case 0x0: |
| 351 |
DPRINTF("Test Unit Ready\n");
|
| 352 |
break;
|
| 353 |
case 0x03: |
| 354 |
DPRINTF("Request Sense (len %d)\n", len);
|
| 355 |
if (len < 4) |
| 356 |
goto fail;
|
| 357 |
memset(outbuf, 0, 4); |
| 358 |
outbuf[0] = 0xf0; |
| 359 |
outbuf[1] = 0; |
| 360 |
outbuf[2] = s->sense;
|
| 361 |
r->buf_len = 4;
|
| 362 |
break;
|
| 363 |
case 0x12: |
| 364 |
DPRINTF("Inquiry (len %d)\n", len);
|
| 365 |
if (buf[1] & 0x2) { |
| 366 |
/* Command support data - optional, not implemented */
|
| 367 |
BADF("optional INQUIRY command support request not implemented\n");
|
| 368 |
goto fail;
|
| 369 |
} |
| 370 |
else if (buf[1] & 0x1) { |
| 371 |
/* Vital product data */
|
| 372 |
uint8_t page_code = buf[2];
|
| 373 |
if (len < 4) { |
| 374 |
BADF("Error: Inquiry (EVPD[%02X]) buffer size %d is "
|
| 375 |
"less than 4\n", page_code, len);
|
| 376 |
goto fail;
|
| 377 |
} |
| 378 |
|
| 379 |
switch (page_code) {
|
| 380 |
case 0x00: |
| 381 |
{
|
| 382 |
/* Supported page codes, mandatory */
|
| 383 |
DPRINTF("Inquiry EVPD[Supported pages] "
|
| 384 |
"buffer size %d\n", len);
|
| 385 |
|
| 386 |
r->buf_len = 0;
|
| 387 |
|
| 388 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
| 389 |
outbuf[r->buf_len++] = 5;
|
| 390 |
} else {
|
| 391 |
outbuf[r->buf_len++] = 0;
|
| 392 |
} |
| 393 |
|
| 394 |
outbuf[r->buf_len++] = 0x00; // this page |
| 395 |
outbuf[r->buf_len++] = 0x00;
|
| 396 |
outbuf[r->buf_len++] = 3; // number of pages |
| 397 |
outbuf[r->buf_len++] = 0x00; // list of supported pages (this page) |
| 398 |
outbuf[r->buf_len++] = 0x80; // unit serial number |
| 399 |
outbuf[r->buf_len++] = 0x83; // device identification |
| 400 |
} |
| 401 |
break;
|
| 402 |
case 0x80: |
| 403 |
{
|
| 404 |
/* Device serial number, optional */
|
| 405 |
if (len < 4) { |
| 406 |
BADF("Error: EVPD[Serial number] Inquiry buffer "
|
| 407 |
"size %d too small, %d needed\n", len, 4); |
| 408 |
goto fail;
|
| 409 |
} |
| 410 |
|
| 411 |
DPRINTF("Inquiry EVPD[Serial number] buffer size %d\n", len);
|
| 412 |
|
| 413 |
r->buf_len = 0;
|
| 414 |
|
| 415 |
/* Supported page codes */
|
| 416 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
| 417 |
outbuf[r->buf_len++] = 5;
|
| 418 |
} else {
|
| 419 |
outbuf[r->buf_len++] = 0;
|
| 420 |
} |
| 421 |
|
| 422 |
outbuf[r->buf_len++] = 0x80; // this page |
| 423 |
outbuf[r->buf_len++] = 0x00;
|
| 424 |
outbuf[r->buf_len++] = 0x01; // 1 byte data follow |
| 425 |
|
| 426 |
outbuf[r->buf_len++] = '0'; // 1 byte data follow |
| 427 |
} |
| 428 |
|
| 429 |
break;
|
| 430 |
case 0x83: |
| 431 |
{
|
| 432 |
/* Device identification page, mandatory */
|
| 433 |
int max_len = 255 - 8; |
| 434 |
int id_len = strlen(bdrv_get_device_name(s->bdrv));
|
| 435 |
if (id_len > max_len)
|
| 436 |
id_len = max_len; |
| 437 |
|
| 438 |
DPRINTF("Inquiry EVPD[Device identification] "
|
| 439 |
"buffer size %d\n", len);
|
| 440 |
r->buf_len = 0;
|
| 441 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
| 442 |
outbuf[r->buf_len++] = 5;
|
| 443 |
} else {
|
| 444 |
outbuf[r->buf_len++] = 0;
|
| 445 |
} |
| 446 |
|
| 447 |
outbuf[r->buf_len++] = 0x83; // this page |
| 448 |
outbuf[r->buf_len++] = 0x00;
|
| 449 |
outbuf[r->buf_len++] = 3 + id_len;
|
| 450 |
|
| 451 |
outbuf[r->buf_len++] = 0x2; // ASCII |
| 452 |
outbuf[r->buf_len++] = 0; // not officially assigned |
| 453 |
outbuf[r->buf_len++] = 0; // reserved |
| 454 |
outbuf[r->buf_len++] = id_len; // length of data following
|
| 455 |
|
| 456 |
memcpy(&outbuf[r->buf_len], |
| 457 |
bdrv_get_device_name(s->bdrv), id_len); |
| 458 |
r->buf_len += id_len; |
| 459 |
} |
| 460 |
break;
|
| 461 |
default:
|
| 462 |
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
|
| 463 |
"buffer size %d\n", page_code, len);
|
| 464 |
goto fail;
|
| 465 |
} |
| 466 |
/* done with EVPD */
|
| 467 |
break;
|
| 468 |
} |
| 469 |
else {
|
| 470 |
/* Standard INQUIRY data */
|
| 471 |
if (buf[2] != 0) { |
| 472 |
BADF("Error: Inquiry (STANDARD) page or code "
|
| 473 |
"is non-zero [%02X]\n", buf[2]); |
| 474 |
goto fail;
|
| 475 |
} |
| 476 |
|
| 477 |
/* PAGE CODE == 0 */
|
| 478 |
if (len < 5) { |
| 479 |
BADF("Error: Inquiry (STANDARD) buffer size %d "
|
| 480 |
"is less than 5\n", len);
|
| 481 |
goto fail;
|
| 482 |
} |
| 483 |
|
| 484 |
if (len < 36) { |
| 485 |
BADF("Error: Inquiry (STANDARD) buffer size %d "
|
| 486 |
"is less than 36 (TODO: only 5 required)\n", len);
|
| 487 |
} |
| 488 |
} |
| 489 |
memset(outbuf, 0, 36); |
| 490 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
| 491 |
outbuf[0] = 5; |
| 492 |
outbuf[1] = 0x80; |
| 493 |
memcpy(&outbuf[16], "QEMU CD-ROM ", 16); |
| 494 |
} else {
|
| 495 |
outbuf[0] = 0; |
| 496 |
memcpy(&outbuf[16], "QEMU HARDDISK ", 16); |
| 497 |
} |
| 498 |
memcpy(&outbuf[8], "QEMU ", 8); |
| 499 |
memcpy(&outbuf[32], QEMU_VERSION, 4); |
| 500 |
/* Identify device as SCSI-3 rev 1.
|
| 501 |
Some later commands are also implemented. */
|
| 502 |
outbuf[2] = 3; |
| 503 |
outbuf[3] = 2; /* Format 2 */ |
| 504 |
outbuf[4] = 31; |
| 505 |
/* Sync data transfer and TCQ. */
|
| 506 |
outbuf[7] = 0x10 | (s->tcq ? 0x02 : 0); |
| 507 |
r->buf_len = 36;
|
| 508 |
break;
|
| 509 |
case 0x16: |
| 510 |
DPRINTF("Reserve(6)\n");
|
| 511 |
if (buf[1] & 1) |
| 512 |
goto fail;
|
| 513 |
break;
|
| 514 |
case 0x17: |
| 515 |
DPRINTF("Release(6)\n");
|
| 516 |
if (buf[1] & 1) |
| 517 |
goto fail;
|
| 518 |
break;
|
| 519 |
case 0x1a: |
| 520 |
case 0x5a: |
| 521 |
{
|
| 522 |
uint8_t *p; |
| 523 |
int page;
|
| 524 |
|
| 525 |
page = buf[2] & 0x3f; |
| 526 |
DPRINTF("Mode Sense (page %d, len %d)\n", page, len);
|
| 527 |
p = outbuf; |
| 528 |
memset(p, 0, 4); |
| 529 |
outbuf[1] = 0; /* Default media type. */ |
| 530 |
outbuf[3] = 0; /* Block descriptor length. */ |
| 531 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
| 532 |
outbuf[2] = 0x80; /* Readonly. */ |
| 533 |
} |
| 534 |
p += 4;
|
| 535 |
if (page == 4) { |
| 536 |
int cylinders, heads, secs;
|
| 537 |
|
| 538 |
/* Rigid disk device geometry page. */
|
| 539 |
p[0] = 4; |
| 540 |
p[1] = 0x16; |
| 541 |
/* if a geometry hint is available, use it */
|
| 542 |
bdrv_get_geometry_hint(s->bdrv, &cylinders, &heads, &secs); |
| 543 |
p[2] = (cylinders >> 16) & 0xff; |
| 544 |
p[3] = (cylinders >> 8) & 0xff; |
| 545 |
p[4] = cylinders & 0xff; |
| 546 |
p[5] = heads & 0xff; |
| 547 |
/* Write precomp start cylinder, disabled */
|
| 548 |
p[6] = (cylinders >> 16) & 0xff; |
| 549 |
p[7] = (cylinders >> 8) & 0xff; |
| 550 |
p[8] = cylinders & 0xff; |
| 551 |
/* Reduced current start cylinder, disabled */
|
| 552 |
p[9] = (cylinders >> 16) & 0xff; |
| 553 |
p[10] = (cylinders >> 8) & 0xff; |
| 554 |
p[11] = cylinders & 0xff; |
| 555 |
/* Device step rate [ns], 200ns */
|
| 556 |
p[12] = 0; |
| 557 |
p[13] = 200; |
| 558 |
/* Landing zone cylinder */
|
| 559 |
p[14] = 0xff; |
| 560 |
p[15] = 0xff; |
| 561 |
p[16] = 0xff; |
| 562 |
/* Medium rotation rate [rpm], 5400 rpm */
|
| 563 |
p[20] = (5400 >> 8) & 0xff; |
| 564 |
p[21] = 5400 & 0xff; |
| 565 |
p += 0x16;
|
| 566 |
} else if (page == 5) { |
| 567 |
int cylinders, heads, secs;
|
| 568 |
|
| 569 |
/* Flexible disk device geometry page. */
|
| 570 |
p[0] = 5; |
| 571 |
p[1] = 0x1e; |
| 572 |
/* Transfer rate [kbit/s], 5Mbit/s */
|
| 573 |
p[2] = 5000 >> 8; |
| 574 |
p[3] = 5000 & 0xff; |
| 575 |
/* if a geometry hint is available, use it */
|
| 576 |
bdrv_get_geometry_hint(s->bdrv, &cylinders, &heads, &secs); |
| 577 |
p[4] = heads & 0xff; |
| 578 |
p[5] = secs & 0xff; |
| 579 |
p[6] = s->cluster_size * 2; |
| 580 |
p[8] = (cylinders >> 8) & 0xff; |
| 581 |
p[9] = cylinders & 0xff; |
| 582 |
/* Write precomp start cylinder, disabled */
|
| 583 |
p[10] = (cylinders >> 8) & 0xff; |
| 584 |
p[11] = cylinders & 0xff; |
| 585 |
/* Reduced current start cylinder, disabled */
|
| 586 |
p[12] = (cylinders >> 8) & 0xff; |
| 587 |
p[13] = cylinders & 0xff; |
| 588 |
/* Device step rate [100us], 100us */
|
| 589 |
p[14] = 0; |
| 590 |
p[15] = 1; |
| 591 |
/* Device step pulse width [us], 1us */
|
| 592 |
p[16] = 1; |
| 593 |
/* Device head settle delay [100us], 100us */
|
| 594 |
p[17] = 0; |
| 595 |
p[18] = 1; |
| 596 |
/* Motor on delay [0.1s], 0.1s */
|
| 597 |
p[19] = 1; |
| 598 |
/* Motor off delay [0.1s], 0.1s */
|
| 599 |
p[20] = 1; |
| 600 |
/* Medium rotation rate [rpm], 5400 rpm */
|
| 601 |
p[28] = (5400 >> 8) & 0xff; |
| 602 |
p[29] = 5400 & 0xff; |
| 603 |
p += 0x1e;
|
| 604 |
} else if ((page == 8 || page == 0x3f)) { |
| 605 |
/* Caching page. */
|
| 606 |
memset(p,0,20); |
| 607 |
p[0] = 8; |
| 608 |
p[1] = 0x12; |
| 609 |
p[2] = 4; /* WCE */ |
| 610 |
p += 20;
|
| 611 |
} |
| 612 |
if ((page == 0x3f || page == 0x2a) |
| 613 |
&& (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM)) {
|
| 614 |
/* CD Capabilities and Mechanical Status page. */
|
| 615 |
p[0] = 0x2a; |
| 616 |
p[1] = 0x14; |
| 617 |
p[2] = 3; // CD-R & CD-RW read |
| 618 |
p[3] = 0; // Writing not supported |
| 619 |
p[4] = 0x7f; /* Audio, composite, digital out, |
| 620 |
mode 2 form 1&2, multi session */
|
| 621 |
p[5] = 0xff; /* CD DA, DA accurate, RW supported, |
| 622 |
RW corrected, C2 errors, ISRC,
|
| 623 |
UPC, Bar code */
|
| 624 |
p[6] = 0x2d | (bdrv_is_locked(s->bdrv)? 2 : 0); |
| 625 |
/* Locking supported, jumper present, eject, tray */
|
| 626 |
p[7] = 0; /* no volume & mute control, no |
| 627 |
changer */
|
| 628 |
p[8] = (50 * 176) >> 8; // 50x read speed |
| 629 |
p[9] = (50 * 176) & 0xff; |
| 630 |
p[10] = 0 >> 8; // No volume |
| 631 |
p[11] = 0 & 0xff; |
| 632 |
p[12] = 2048 >> 8; // 2M buffer |
| 633 |
p[13] = 2048 & 0xff; |
| 634 |
p[14] = (16 * 176) >> 8; // 16x read speed current |
| 635 |
p[15] = (16 * 176) & 0xff; |
| 636 |
p[18] = (16 * 176) >> 8; // 16x write speed |
| 637 |
p[19] = (16 * 176) & 0xff; |
| 638 |
p[20] = (16 * 176) >> 8; // 16x write speed current |
| 639 |
p[21] = (16 * 176) & 0xff; |
| 640 |
p += 22;
|
| 641 |
} |
| 642 |
r->buf_len = p - outbuf; |
| 643 |
outbuf[0] = r->buf_len - 4; |
| 644 |
if (r->buf_len > len)
|
| 645 |
r->buf_len = len; |
| 646 |
} |
| 647 |
break;
|
| 648 |
case 0x1b: |
| 649 |
DPRINTF("Start Stop Unit\n");
|
| 650 |
break;
|
| 651 |
case 0x1e: |
| 652 |
DPRINTF("Prevent Allow Medium Removal (prevent = %d)\n", buf[4] & 3); |
| 653 |
bdrv_set_locked(s->bdrv, buf[4] & 1); |
| 654 |
break;
|
| 655 |
case 0x25: |
| 656 |
DPRINTF("Read Capacity\n");
|
| 657 |
/* The normal LEN field for this command is zero. */
|
| 658 |
memset(outbuf, 0, 8); |
| 659 |
bdrv_get_geometry(s->bdrv, &nb_sectors); |
| 660 |
/* Returned value is the address of the last sector. */
|
| 661 |
if (nb_sectors) {
|
| 662 |
nb_sectors--; |
| 663 |
outbuf[0] = (nb_sectors >> 24) & 0xff; |
| 664 |
outbuf[1] = (nb_sectors >> 16) & 0xff; |
| 665 |
outbuf[2] = (nb_sectors >> 8) & 0xff; |
| 666 |
outbuf[3] = nb_sectors & 0xff; |
| 667 |
outbuf[4] = 0; |
| 668 |
outbuf[5] = 0; |
| 669 |
outbuf[6] = s->cluster_size * 2; |
| 670 |
outbuf[7] = 0; |
| 671 |
r->buf_len = 8;
|
| 672 |
} else {
|
| 673 |
scsi_command_complete(r, SENSE_NOT_READY); |
| 674 |
return 0; |
| 675 |
} |
| 676 |
break;
|
| 677 |
case 0x08: |
| 678 |
case 0x28: |
| 679 |
DPRINTF("Read (sector %d, count %d)\n", lba, len);
|
| 680 |
r->sector = lba * s->cluster_size; |
| 681 |
r->sector_count = len * s->cluster_size; |
| 682 |
break;
|
| 683 |
case 0x0a: |
| 684 |
case 0x2a: |
| 685 |
DPRINTF("Write (sector %d, count %d)\n", lba, len);
|
| 686 |
r->sector = lba * s->cluster_size; |
| 687 |
r->sector_count = len * s->cluster_size; |
| 688 |
is_write = 1;
|
| 689 |
break;
|
| 690 |
case 0x35: |
| 691 |
DPRINTF("Synchronise cache (sector %d, count %d)\n", lba, len);
|
| 692 |
bdrv_flush(s->bdrv); |
| 693 |
break;
|
| 694 |
case 0x43: |
| 695 |
{
|
| 696 |
int start_track, format, msf, toclen;
|
| 697 |
|
| 698 |
msf = buf[1] & 2; |
| 699 |
format = buf[2] & 0xf; |
| 700 |
start_track = buf[6];
|
| 701 |
bdrv_get_geometry(s->bdrv, &nb_sectors); |
| 702 |
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
| 703 |
switch(format) {
|
| 704 |
case 0: |
| 705 |
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); |
| 706 |
break;
|
| 707 |
case 1: |
| 708 |
/* multi session : only a single session defined */
|
| 709 |
toclen = 12;
|
| 710 |
memset(outbuf, 0, 12); |
| 711 |
outbuf[1] = 0x0a; |
| 712 |
outbuf[2] = 0x01; |
| 713 |
outbuf[3] = 0x01; |
| 714 |
break;
|
| 715 |
case 2: |
| 716 |
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); |
| 717 |
break;
|
| 718 |
default:
|
| 719 |
goto error_cmd;
|
| 720 |
} |
| 721 |
if (toclen > 0) { |
| 722 |
if (len > toclen)
|
| 723 |
len = toclen; |
| 724 |
r->buf_len = len; |
| 725 |
break;
|
| 726 |
} |
| 727 |
error_cmd:
|
| 728 |
DPRINTF("Read TOC error\n");
|
| 729 |
goto fail;
|
| 730 |
} |
| 731 |
case 0x46: |
| 732 |
DPRINTF("Get Configuration (rt %d, maxlen %d)\n", buf[1] & 3, len); |
| 733 |
memset(outbuf, 0, 8); |
| 734 |
/* ??? This should probably return much more information. For now
|
| 735 |
just return the basic header indicating the CD-ROM profile. */
|
| 736 |
outbuf[7] = 8; // CD-ROM |
| 737 |
r->buf_len = 8;
|
| 738 |
break;
|
| 739 |
case 0x56: |
| 740 |
DPRINTF("Reserve(10)\n");
|
| 741 |
if (buf[1] & 3) |
| 742 |
goto fail;
|
| 743 |
break;
|
| 744 |
case 0x57: |
| 745 |
DPRINTF("Release(10)\n");
|
| 746 |
if (buf[1] & 3) |
| 747 |
goto fail;
|
| 748 |
break;
|
| 749 |
case 0xa0: |
| 750 |
DPRINTF("Report LUNs (len %d)\n", len);
|
| 751 |
if (len < 16) |
| 752 |
goto fail;
|
| 753 |
memset(outbuf, 0, 16); |
| 754 |
outbuf[3] = 8; |
| 755 |
r->buf_len = 16;
|
| 756 |
break;
|
| 757 |
default:
|
| 758 |
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
| 759 |
fail:
|
| 760 |
scsi_command_complete(r, SENSE_ILLEGAL_REQUEST); |
| 761 |
return 0; |
| 762 |
} |
| 763 |
if (r->sector_count == 0 && r->buf_len == 0) { |
| 764 |
scsi_command_complete(r, SENSE_NO_SENSE); |
| 765 |
} |
| 766 |
len = r->sector_count * 512 + r->buf_len;
|
| 767 |
if (is_write) {
|
| 768 |
return -len;
|
| 769 |
} else {
|
| 770 |
if (!r->sector_count)
|
| 771 |
r->sector_count = -1;
|
| 772 |
return len;
|
| 773 |
} |
| 774 |
} |
| 775 |
|
| 776 |
static void scsi_destroy(SCSIDevice *d) |
| 777 |
{
|
| 778 |
qemu_free(d->state); |
| 779 |
qemu_free(d); |
| 780 |
} |
| 781 |
|
| 782 |
SCSIDevice *scsi_disk_init(BlockDriverState *bdrv, int tcq,
|
| 783 |
scsi_completionfn completion, void *opaque)
|
| 784 |
{
|
| 785 |
SCSIDevice *d; |
| 786 |
SCSIDeviceState *s; |
| 787 |
|
| 788 |
s = (SCSIDeviceState *)qemu_mallocz(sizeof(SCSIDeviceState));
|
| 789 |
s->bdrv = bdrv; |
| 790 |
s->tcq = tcq; |
| 791 |
s->completion = completion; |
| 792 |
s->opaque = opaque; |
| 793 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
| 794 |
s->cluster_size = 4;
|
| 795 |
} else {
|
| 796 |
s->cluster_size = 1;
|
| 797 |
} |
| 798 |
|
| 799 |
d = (SCSIDevice *)qemu_mallocz(sizeof(SCSIDevice));
|
| 800 |
d->state = s; |
| 801 |
d->destroy = scsi_destroy; |
| 802 |
d->send_command = scsi_send_command; |
| 803 |
d->read_data = scsi_read_data; |
| 804 |
d->write_data = scsi_write_data; |
| 805 |
d->cancel_io = scsi_cancel_io; |
| 806 |
d->get_buf = scsi_get_buf; |
| 807 |
|
| 808 |
return d;
|
| 809 |
} |