root / hw / scsi-disk.c @ eae6bcbf
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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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#define BADF(fmt, ...) \
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do { fprintf(stderr, "scsi-disk: " fmt , ## __VA_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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#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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#define STATUS_GOOD 0 |
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#define STATUS_CHECK_CONDITION 2 |
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|
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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 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 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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BlockDriverAIOCB *aiocb; |
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struct SCSIRequest *next;
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uint32_t status; |
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} SCSIRequest; |
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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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uint64_t max_lba; |
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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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char drive_serial_str[21]; |
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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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static SCSIRequest *scsi_new_request(SCSIDeviceState *s, uint32_t tag)
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{ |
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SCSIRequest *r; |
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|
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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->iov.iov_base = 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->iov.iov_len = 0;
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r->aiocb = NULL;
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r->status = 0;
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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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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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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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static SCSIRequest *scsi_find_request(SCSIDeviceState *s, uint32_t tag)
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{ |
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SCSIRequest *r; |
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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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return r;
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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 status, 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 status=%d sense=%d\n", r->tag, status, 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, status); |
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} |
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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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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); |
156 |
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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} |
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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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SCSIRequest *r = (SCSIRequest *)opaque; |
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SCSIDeviceState *s = r->dev; |
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if (ret) {
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DPRINTF("IO error\n");
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s->completion(s->opaque, SCSI_REASON_DATA, r->tag, 0);
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scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_NO_SENSE); |
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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->iov.iov_len);
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s->completion(s->opaque, SCSI_REASON_DATA, r->tag, r->iov.iov_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; |
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r = scsi_find_request(s, tag); |
188 |
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, STATUS_CHECK_CONDITION, SENSE_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=%d\n", r->iov.iov_len);
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r->sector_count = 0;
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s->completion(s->opaque, SCSI_REASON_DATA, r->tag, r->iov.iov_len); |
198 |
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, STATUS_GOOD, SENSE_NO_SENSE); |
203 |
return;
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} |
205 |
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n = r->sector_count; |
207 |
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->aiocb = bdrv_aio_readv(s->bdrv, r->sector, &r->qiov, n, |
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scsi_read_complete, r); |
214 |
if (r->aiocb == NULL) |
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scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR); |
216 |
r->sector += n; |
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r->sector_count -= n; |
218 |
} |
219 |
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static int scsi_handle_write_error(SCSIRequest *r, int error) |
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{ |
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BlockInterfaceErrorAction action = drive_get_onerror(r->dev->bdrv); |
223 |
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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, STATUS_CHECK_CONDITION, |
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SENSE_HARDWARE_ERROR); |
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} |
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return 1; |
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} |
238 |
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static void scsi_write_complete(void * opaque, int ret) |
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{ |
241 |
SCSIRequest *r = (SCSIRequest *)opaque; |
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SCSIDeviceState *s = r->dev; |
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uint32_t len; |
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uint32_t n; |
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r->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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} |
252 |
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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; |
256 |
if (r->sector_count == 0) { |
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scsi_command_complete(r, STATUS_GOOD, SENSE_NO_SENSE); |
258 |
} 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; |
262 |
} |
263 |
r->iov.iov_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); |
266 |
} |
267 |
} |
268 |
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static void scsi_write_request(SCSIRequest *r) |
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{ |
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SCSIDeviceState *s = r->dev; |
272 |
uint32_t n; |
273 |
|
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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->aiocb = bdrv_aio_writev(s->bdrv, r->sector, &r->qiov, n, |
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scsi_write_complete, r); |
279 |
if (r->aiocb == NULL) |
280 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, |
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SENSE_HARDWARE_ERROR); |
282 |
} 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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} |
286 |
} |
287 |
|
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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) |
291 |
{ |
292 |
SCSIDeviceState *s = d->state; |
293 |
SCSIRequest *r; |
294 |
|
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DPRINTF("Write data tag=0x%x\n", tag);
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r = scsi_find_request(s, tag); |
297 |
if (!r) {
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BADF("Bad write tag 0x%x\n", tag);
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scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR); |
300 |
return 1; |
301 |
} |
302 |
|
303 |
if (r->aiocb)
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BADF("Data transfer already in progress\n");
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305 |
|
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scsi_write_request(r); |
307 |
|
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return 0; |
309 |
} |
310 |
|
311 |
static void scsi_dma_restart_cb(void *opaque, int running, int reason) |
312 |
{ |
313 |
SCSIDeviceState *s = opaque; |
314 |
SCSIRequest *r = s->requests; |
315 |
if (!running)
|
316 |
return;
|
317 |
|
318 |
while (r) {
|
319 |
if (r->status & SCSI_REQ_STATUS_RETRY) {
|
320 |
r->status &= ~SCSI_REQ_STATUS_RETRY; |
321 |
scsi_write_request(r); |
322 |
} |
323 |
r = r->next; |
324 |
} |
325 |
} |
326 |
|
327 |
/* Return a pointer to the data buffer. */
|
328 |
static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
|
329 |
{ |
330 |
SCSIDeviceState *s = d->state; |
331 |
SCSIRequest *r; |
332 |
|
333 |
r = scsi_find_request(s, tag); |
334 |
if (!r) {
|
335 |
BADF("Bad buffer tag 0x%x\n", tag);
|
336 |
return NULL; |
337 |
} |
338 |
return (uint8_t *)r->iov.iov_base;
|
339 |
} |
340 |
|
341 |
/* Execute a scsi command. Returns the length of the data expected by the
|
342 |
command. This will be Positive for data transfers from the device
|
343 |
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
344 |
and zero if the command does not transfer any data. */
|
345 |
|
346 |
static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
|
347 |
uint8_t *buf, int lun)
|
348 |
{ |
349 |
SCSIDeviceState *s = d->state; |
350 |
uint64_t nb_sectors; |
351 |
uint64_t lba; |
352 |
uint32_t len; |
353 |
int cmdlen;
|
354 |
int is_write;
|
355 |
uint8_t command; |
356 |
uint8_t *outbuf; |
357 |
SCSIRequest *r; |
358 |
|
359 |
command = buf[0];
|
360 |
r = scsi_find_request(s, tag); |
361 |
if (r) {
|
362 |
BADF("Tag 0x%x already in use\n", tag);
|
363 |
scsi_cancel_io(d, tag); |
364 |
} |
365 |
/* ??? Tags are not unique for different luns. We only implement a
|
366 |
single lun, so this should not matter. */
|
367 |
r = scsi_new_request(s, tag); |
368 |
outbuf = (uint8_t *)r->iov.iov_base; |
369 |
is_write = 0;
|
370 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]); |
371 |
switch (command >> 5) { |
372 |
case 0: |
373 |
lba = (uint64_t) buf[3] | ((uint64_t) buf[2] << 8) | |
374 |
(((uint64_t) buf[1] & 0x1f) << 16); |
375 |
len = buf[4];
|
376 |
cmdlen = 6;
|
377 |
break;
|
378 |
case 1: |
379 |
case 2: |
380 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
381 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
382 |
len = buf[8] | (buf[7] << 8); |
383 |
cmdlen = 10;
|
384 |
break;
|
385 |
case 4: |
386 |
lba = (uint64_t) buf[9] | ((uint64_t) buf[8] << 8) | |
387 |
((uint64_t) buf[7] << 16) | ((uint64_t) buf[6] << 24) | |
388 |
((uint64_t) buf[5] << 32) | ((uint64_t) buf[4] << 40) | |
389 |
((uint64_t) buf[3] << 48) | ((uint64_t) buf[2] << 56); |
390 |
len = buf[13] | (buf[12] << 8) | (buf[11] << 16) | (buf[10] << 24); |
391 |
cmdlen = 16;
|
392 |
break;
|
393 |
case 5: |
394 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
395 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
396 |
len = buf[9] | (buf[8] << 8) | (buf[7] << 16) | (buf[6] << 24); |
397 |
cmdlen = 12;
|
398 |
break;
|
399 |
default:
|
400 |
BADF("Unsupported command length, command %x\n", command);
|
401 |
goto fail;
|
402 |
} |
403 |
#ifdef DEBUG_SCSI
|
404 |
{ |
405 |
int i;
|
406 |
for (i = 1; i < cmdlen; i++) { |
407 |
printf(" 0x%02x", buf[i]);
|
408 |
} |
409 |
printf("\n");
|
410 |
} |
411 |
#endif
|
412 |
if (lun || buf[1] >> 5) { |
413 |
/* Only LUN 0 supported. */
|
414 |
DPRINTF("Unimplemented LUN %d\n", lun ? lun : buf[1] >> 5); |
415 |
if (command != 0x03 && command != 0x12) /* REQUEST SENSE and INQUIRY */ |
416 |
goto fail;
|
417 |
} |
418 |
switch (command) {
|
419 |
case 0x0: |
420 |
DPRINTF("Test Unit Ready\n");
|
421 |
if (!bdrv_is_inserted(s->bdrv))
|
422 |
goto notready;
|
423 |
break;
|
424 |
case 0x03: |
425 |
DPRINTF("Request Sense (len %d)\n", len);
|
426 |
if (len < 4) |
427 |
goto fail;
|
428 |
memset(outbuf, 0, 4); |
429 |
r->iov.iov_len = 4;
|
430 |
if (s->sense == SENSE_NOT_READY && len >= 18) { |
431 |
memset(outbuf, 0, 18); |
432 |
r->iov.iov_len = 18;
|
433 |
outbuf[7] = 10; |
434 |
/* asc 0x3a, ascq 0: Medium not present */
|
435 |
outbuf[12] = 0x3a; |
436 |
outbuf[13] = 0; |
437 |
} |
438 |
outbuf[0] = 0xf0; |
439 |
outbuf[1] = 0; |
440 |
outbuf[2] = s->sense;
|
441 |
break;
|
442 |
case 0x12: |
443 |
DPRINTF("Inquiry (len %d)\n", len);
|
444 |
if (buf[1] & 0x2) { |
445 |
/* Command support data - optional, not implemented */
|
446 |
BADF("optional INQUIRY command support request not implemented\n");
|
447 |
goto fail;
|
448 |
} |
449 |
else if (buf[1] & 0x1) { |
450 |
/* Vital product data */
|
451 |
uint8_t page_code = buf[2];
|
452 |
if (len < 4) { |
453 |
BADF("Error: Inquiry (EVPD[%02X]) buffer size %d is "
|
454 |
"less than 4\n", page_code, len);
|
455 |
goto fail;
|
456 |
} |
457 |
|
458 |
switch (page_code) {
|
459 |
case 0x00: |
460 |
{ |
461 |
/* Supported page codes, mandatory */
|
462 |
DPRINTF("Inquiry EVPD[Supported pages] "
|
463 |
"buffer size %d\n", len);
|
464 |
|
465 |
r->iov.iov_len = 0;
|
466 |
|
467 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
468 |
outbuf[r->iov.iov_len++] = 5;
|
469 |
} else {
|
470 |
outbuf[r->iov.iov_len++] = 0;
|
471 |
} |
472 |
|
473 |
outbuf[r->iov.iov_len++] = 0x00; // this page |
474 |
outbuf[r->iov.iov_len++] = 0x00;
|
475 |
outbuf[r->iov.iov_len++] = 3; // number of pages |
476 |
outbuf[r->iov.iov_len++] = 0x00; // list of supported pages (this page) |
477 |
outbuf[r->iov.iov_len++] = 0x80; // unit serial number |
478 |
outbuf[r->iov.iov_len++] = 0x83; // device identification |
479 |
} |
480 |
break;
|
481 |
case 0x80: |
482 |
{ |
483 |
int l;
|
484 |
|
485 |
/* Device serial number, optional */
|
486 |
if (len < 4) { |
487 |
BADF("Error: EVPD[Serial number] Inquiry buffer "
|
488 |
"size %d too small, %d needed\n", len, 4); |
489 |
goto fail;
|
490 |
} |
491 |
|
492 |
DPRINTF("Inquiry EVPD[Serial number] buffer size %d\n", len);
|
493 |
l = MIN(len, strlen(s->drive_serial_str)); |
494 |
|
495 |
r->iov.iov_len = 0;
|
496 |
|
497 |
/* Supported page codes */
|
498 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
499 |
outbuf[r->iov.iov_len++] = 5;
|
500 |
} else {
|
501 |
outbuf[r->iov.iov_len++] = 0;
|
502 |
} |
503 |
|
504 |
outbuf[r->iov.iov_len++] = 0x80; // this page |
505 |
outbuf[r->iov.iov_len++] = 0x00;
|
506 |
outbuf[r->iov.iov_len++] = l; |
507 |
memcpy(&outbuf[r->iov.iov_len], s->drive_serial_str, l); |
508 |
r->iov.iov_len += l; |
509 |
} |
510 |
|
511 |
break;
|
512 |
case 0x83: |
513 |
{ |
514 |
/* Device identification page, mandatory */
|
515 |
int max_len = 255 - 8; |
516 |
int id_len = strlen(bdrv_get_device_name(s->bdrv));
|
517 |
if (id_len > max_len)
|
518 |
id_len = max_len; |
519 |
|
520 |
DPRINTF("Inquiry EVPD[Device identification] "
|
521 |
"buffer size %d\n", len);
|
522 |
r->iov.iov_len = 0;
|
523 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
524 |
outbuf[r->iov.iov_len++] = 5;
|
525 |
} else {
|
526 |
outbuf[r->iov.iov_len++] = 0;
|
527 |
} |
528 |
|
529 |
outbuf[r->iov.iov_len++] = 0x83; // this page |
530 |
outbuf[r->iov.iov_len++] = 0x00;
|
531 |
outbuf[r->iov.iov_len++] = 3 + id_len;
|
532 |
|
533 |
outbuf[r->iov.iov_len++] = 0x2; // ASCII |
534 |
outbuf[r->iov.iov_len++] = 0; // not officially assigned |
535 |
outbuf[r->iov.iov_len++] = 0; // reserved |
536 |
outbuf[r->iov.iov_len++] = id_len; // length of data following
|
537 |
|
538 |
memcpy(&outbuf[r->iov.iov_len], |
539 |
bdrv_get_device_name(s->bdrv), id_len); |
540 |
r->iov.iov_len += id_len; |
541 |
} |
542 |
break;
|
543 |
default:
|
544 |
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
|
545 |
"buffer size %d\n", page_code, len);
|
546 |
goto fail;
|
547 |
} |
548 |
/* done with EVPD */
|
549 |
break;
|
550 |
} |
551 |
else {
|
552 |
/* Standard INQUIRY data */
|
553 |
if (buf[2] != 0) { |
554 |
BADF("Error: Inquiry (STANDARD) page or code "
|
555 |
"is non-zero [%02X]\n", buf[2]); |
556 |
goto fail;
|
557 |
} |
558 |
|
559 |
/* PAGE CODE == 0 */
|
560 |
if (len < 5) { |
561 |
BADF("Error: Inquiry (STANDARD) buffer size %d "
|
562 |
"is less than 5\n", len);
|
563 |
goto fail;
|
564 |
} |
565 |
|
566 |
if (len < 36) { |
567 |
BADF("Error: Inquiry (STANDARD) buffer size %d "
|
568 |
"is less than 36 (TODO: only 5 required)\n", len);
|
569 |
} |
570 |
} |
571 |
|
572 |
if(len > SCSI_MAX_INQUIRY_LEN)
|
573 |
len = SCSI_MAX_INQUIRY_LEN; |
574 |
|
575 |
memset(outbuf, 0, len);
|
576 |
|
577 |
if (lun || buf[1] >> 5) { |
578 |
outbuf[0] = 0x7f; /* LUN not supported */ |
579 |
} else if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) { |
580 |
outbuf[0] = 5; |
581 |
outbuf[1] = 0x80; |
582 |
memcpy(&outbuf[16], "QEMU CD-ROM ", 16); |
583 |
} else {
|
584 |
outbuf[0] = 0; |
585 |
memcpy(&outbuf[16], "QEMU HARDDISK ", 16); |
586 |
} |
587 |
memcpy(&outbuf[8], "QEMU ", 8); |
588 |
memcpy(&outbuf[32], QEMU_VERSION, 4); |
589 |
/* Identify device as SCSI-3 rev 1.
|
590 |
Some later commands are also implemented. */
|
591 |
outbuf[2] = 3; |
592 |
outbuf[3] = 2; /* Format 2 */ |
593 |
outbuf[4] = len - 5; /* Additional Length = (Len - 1) - 4 */ |
594 |
/* Sync data transfer and TCQ. */
|
595 |
outbuf[7] = 0x10 | (s->tcq ? 0x02 : 0); |
596 |
r->iov.iov_len = len; |
597 |
break;
|
598 |
case 0x16: |
599 |
DPRINTF("Reserve(6)\n");
|
600 |
if (buf[1] & 1) |
601 |
goto fail;
|
602 |
break;
|
603 |
case 0x17: |
604 |
DPRINTF("Release(6)\n");
|
605 |
if (buf[1] & 1) |
606 |
goto fail;
|
607 |
break;
|
608 |
case 0x1a: |
609 |
case 0x5a: |
610 |
{ |
611 |
uint8_t *p; |
612 |
int page;
|
613 |
|
614 |
page = buf[2] & 0x3f; |
615 |
DPRINTF("Mode Sense (page %d, len %d)\n", page, len);
|
616 |
p = outbuf; |
617 |
memset(p, 0, 4); |
618 |
outbuf[1] = 0; /* Default media type. */ |
619 |
outbuf[3] = 0; /* Block descriptor length. */ |
620 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
621 |
outbuf[2] = 0x80; /* Readonly. */ |
622 |
} |
623 |
p += 4;
|
624 |
if (page == 4) { |
625 |
int cylinders, heads, secs;
|
626 |
|
627 |
/* Rigid disk device geometry page. */
|
628 |
p[0] = 4; |
629 |
p[1] = 0x16; |
630 |
/* if a geometry hint is available, use it */
|
631 |
bdrv_get_geometry_hint(s->bdrv, &cylinders, &heads, &secs); |
632 |
p[2] = (cylinders >> 16) & 0xff; |
633 |
p[3] = (cylinders >> 8) & 0xff; |
634 |
p[4] = cylinders & 0xff; |
635 |
p[5] = heads & 0xff; |
636 |
/* Write precomp start cylinder, disabled */
|
637 |
p[6] = (cylinders >> 16) & 0xff; |
638 |
p[7] = (cylinders >> 8) & 0xff; |
639 |
p[8] = cylinders & 0xff; |
640 |
/* Reduced current start cylinder, disabled */
|
641 |
p[9] = (cylinders >> 16) & 0xff; |
642 |
p[10] = (cylinders >> 8) & 0xff; |
643 |
p[11] = cylinders & 0xff; |
644 |
/* Device step rate [ns], 200ns */
|
645 |
p[12] = 0; |
646 |
p[13] = 200; |
647 |
/* Landing zone cylinder */
|
648 |
p[14] = 0xff; |
649 |
p[15] = 0xff; |
650 |
p[16] = 0xff; |
651 |
/* Medium rotation rate [rpm], 5400 rpm */
|
652 |
p[20] = (5400 >> 8) & 0xff; |
653 |
p[21] = 5400 & 0xff; |
654 |
p += 0x16;
|
655 |
} else if (page == 5) { |
656 |
int cylinders, heads, secs;
|
657 |
|
658 |
/* Flexible disk device geometry page. */
|
659 |
p[0] = 5; |
660 |
p[1] = 0x1e; |
661 |
/* Transfer rate [kbit/s], 5Mbit/s */
|
662 |
p[2] = 5000 >> 8; |
663 |
p[3] = 5000 & 0xff; |
664 |
/* if a geometry hint is available, use it */
|
665 |
bdrv_get_geometry_hint(s->bdrv, &cylinders, &heads, &secs); |
666 |
p[4] = heads & 0xff; |
667 |
p[5] = secs & 0xff; |
668 |
p[6] = s->cluster_size * 2; |
669 |
p[8] = (cylinders >> 8) & 0xff; |
670 |
p[9] = cylinders & 0xff; |
671 |
/* Write precomp start cylinder, disabled */
|
672 |
p[10] = (cylinders >> 8) & 0xff; |
673 |
p[11] = cylinders & 0xff; |
674 |
/* Reduced current start cylinder, disabled */
|
675 |
p[12] = (cylinders >> 8) & 0xff; |
676 |
p[13] = cylinders & 0xff; |
677 |
/* Device step rate [100us], 100us */
|
678 |
p[14] = 0; |
679 |
p[15] = 1; |
680 |
/* Device step pulse width [us], 1us */
|
681 |
p[16] = 1; |
682 |
/* Device head settle delay [100us], 100us */
|
683 |
p[17] = 0; |
684 |
p[18] = 1; |
685 |
/* Motor on delay [0.1s], 0.1s */
|
686 |
p[19] = 1; |
687 |
/* Motor off delay [0.1s], 0.1s */
|
688 |
p[20] = 1; |
689 |
/* Medium rotation rate [rpm], 5400 rpm */
|
690 |
p[28] = (5400 >> 8) & 0xff; |
691 |
p[29] = 5400 & 0xff; |
692 |
p += 0x1e;
|
693 |
} else if ((page == 8 || page == 0x3f)) { |
694 |
/* Caching page. */
|
695 |
memset(p,0,20); |
696 |
p[0] = 8; |
697 |
p[1] = 0x12; |
698 |
p[2] = 4; /* WCE */ |
699 |
p += 20;
|
700 |
} |
701 |
if ((page == 0x3f || page == 0x2a) |
702 |
&& (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM)) { |
703 |
/* CD Capabilities and Mechanical Status page. */
|
704 |
p[0] = 0x2a; |
705 |
p[1] = 0x14; |
706 |
p[2] = 3; // CD-R & CD-RW read |
707 |
p[3] = 0; // Writing not supported |
708 |
p[4] = 0x7f; /* Audio, composite, digital out, |
709 |
mode 2 form 1&2, multi session */
|
710 |
p[5] = 0xff; /* CD DA, DA accurate, RW supported, |
711 |
RW corrected, C2 errors, ISRC,
|
712 |
UPC, Bar code */
|
713 |
p[6] = 0x2d | (bdrv_is_locked(s->bdrv)? 2 : 0); |
714 |
/* Locking supported, jumper present, eject, tray */
|
715 |
p[7] = 0; /* no volume & mute control, no |
716 |
changer */
|
717 |
p[8] = (50 * 176) >> 8; // 50x read speed |
718 |
p[9] = (50 * 176) & 0xff; |
719 |
p[10] = 0 >> 8; // No volume |
720 |
p[11] = 0 & 0xff; |
721 |
p[12] = 2048 >> 8; // 2M buffer |
722 |
p[13] = 2048 & 0xff; |
723 |
p[14] = (16 * 176) >> 8; // 16x read speed current |
724 |
p[15] = (16 * 176) & 0xff; |
725 |
p[18] = (16 * 176) >> 8; // 16x write speed |
726 |
p[19] = (16 * 176) & 0xff; |
727 |
p[20] = (16 * 176) >> 8; // 16x write speed current |
728 |
p[21] = (16 * 176) & 0xff; |
729 |
p += 22;
|
730 |
} |
731 |
r->iov.iov_len = p - outbuf; |
732 |
outbuf[0] = r->iov.iov_len - 4; |
733 |
if (r->iov.iov_len > len)
|
734 |
r->iov.iov_len = len; |
735 |
} |
736 |
break;
|
737 |
case 0x1b: |
738 |
DPRINTF("Start Stop Unit\n");
|
739 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM &&
|
740 |
(buf[4] & 2)) |
741 |
/* load/eject medium */
|
742 |
bdrv_eject(s->bdrv, !(buf[4] & 1)); |
743 |
break;
|
744 |
case 0x1e: |
745 |
DPRINTF("Prevent Allow Medium Removal (prevent = %d)\n", buf[4] & 3); |
746 |
bdrv_set_locked(s->bdrv, buf[4] & 1); |
747 |
break;
|
748 |
case 0x25: |
749 |
DPRINTF("Read Capacity\n");
|
750 |
/* The normal LEN field for this command is zero. */
|
751 |
memset(outbuf, 0, 8); |
752 |
bdrv_get_geometry(s->bdrv, &nb_sectors); |
753 |
nb_sectors /= s->cluster_size; |
754 |
/* Returned value is the address of the last sector. */
|
755 |
if (nb_sectors) {
|
756 |
nb_sectors--; |
757 |
/* Remember the new size for read/write sanity checking. */
|
758 |
s->max_lba = nb_sectors; |
759 |
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
|
760 |
if (nb_sectors > UINT32_MAX)
|
761 |
nb_sectors = UINT32_MAX; |
762 |
outbuf[0] = (nb_sectors >> 24) & 0xff; |
763 |
outbuf[1] = (nb_sectors >> 16) & 0xff; |
764 |
outbuf[2] = (nb_sectors >> 8) & 0xff; |
765 |
outbuf[3] = nb_sectors & 0xff; |
766 |
outbuf[4] = 0; |
767 |
outbuf[5] = 0; |
768 |
outbuf[6] = s->cluster_size * 2; |
769 |
outbuf[7] = 0; |
770 |
r->iov.iov_len = 8;
|
771 |
} else {
|
772 |
notready:
|
773 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_NOT_READY); |
774 |
return 0; |
775 |
} |
776 |
break;
|
777 |
case 0x08: |
778 |
case 0x28: |
779 |
case 0x88: |
780 |
DPRINTF("Read (sector %lld, count %d)\n", lba, len);
|
781 |
if (lba > s->max_lba)
|
782 |
goto illegal_lba;
|
783 |
r->sector = lba * s->cluster_size; |
784 |
r->sector_count = len * s->cluster_size; |
785 |
break;
|
786 |
case 0x0a: |
787 |
case 0x2a: |
788 |
case 0x8a: |
789 |
DPRINTF("Write (sector %lld, count %d)\n", lba, len);
|
790 |
if (lba > s->max_lba)
|
791 |
goto illegal_lba;
|
792 |
r->sector = lba * s->cluster_size; |
793 |
r->sector_count = len * s->cluster_size; |
794 |
is_write = 1;
|
795 |
break;
|
796 |
case 0x35: |
797 |
DPRINTF("Synchronise cache (sector %d, count %d)\n", lba, len);
|
798 |
bdrv_flush(s->bdrv); |
799 |
break;
|
800 |
case 0x43: |
801 |
{ |
802 |
int start_track, format, msf, toclen;
|
803 |
|
804 |
msf = buf[1] & 2; |
805 |
format = buf[2] & 0xf; |
806 |
start_track = buf[6];
|
807 |
bdrv_get_geometry(s->bdrv, &nb_sectors); |
808 |
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
809 |
nb_sectors /= s->cluster_size; |
810 |
switch(format) {
|
811 |
case 0: |
812 |
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); |
813 |
break;
|
814 |
case 1: |
815 |
/* multi session : only a single session defined */
|
816 |
toclen = 12;
|
817 |
memset(outbuf, 0, 12); |
818 |
outbuf[1] = 0x0a; |
819 |
outbuf[2] = 0x01; |
820 |
outbuf[3] = 0x01; |
821 |
break;
|
822 |
case 2: |
823 |
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); |
824 |
break;
|
825 |
default:
|
826 |
goto error_cmd;
|
827 |
} |
828 |
if (toclen > 0) { |
829 |
if (len > toclen)
|
830 |
len = toclen; |
831 |
r->iov.iov_len = len; |
832 |
break;
|
833 |
} |
834 |
error_cmd:
|
835 |
DPRINTF("Read TOC error\n");
|
836 |
goto fail;
|
837 |
} |
838 |
case 0x46: |
839 |
DPRINTF("Get Configuration (rt %d, maxlen %d)\n", buf[1] & 3, len); |
840 |
memset(outbuf, 0, 8); |
841 |
/* ??? This should probably return much more information. For now
|
842 |
just return the basic header indicating the CD-ROM profile. */
|
843 |
outbuf[7] = 8; // CD-ROM |
844 |
r->iov.iov_len = 8;
|
845 |
break;
|
846 |
case 0x56: |
847 |
DPRINTF("Reserve(10)\n");
|
848 |
if (buf[1] & 3) |
849 |
goto fail;
|
850 |
break;
|
851 |
case 0x57: |
852 |
DPRINTF("Release(10)\n");
|
853 |
if (buf[1] & 3) |
854 |
goto fail;
|
855 |
break;
|
856 |
case 0x9e: |
857 |
/* Service Action In subcommands. */
|
858 |
if ((buf[1] & 31) == 0x10) { |
859 |
DPRINTF("SAI READ CAPACITY(16)\n");
|
860 |
memset(outbuf, 0, len);
|
861 |
bdrv_get_geometry(s->bdrv, &nb_sectors); |
862 |
nb_sectors /= s->cluster_size; |
863 |
/* Returned value is the address of the last sector. */
|
864 |
if (nb_sectors) {
|
865 |
nb_sectors--; |
866 |
/* Remember the new size for read/write sanity checking. */
|
867 |
s->max_lba = nb_sectors; |
868 |
outbuf[0] = (nb_sectors >> 56) & 0xff; |
869 |
outbuf[1] = (nb_sectors >> 48) & 0xff; |
870 |
outbuf[2] = (nb_sectors >> 40) & 0xff; |
871 |
outbuf[3] = (nb_sectors >> 32) & 0xff; |
872 |
outbuf[4] = (nb_sectors >> 24) & 0xff; |
873 |
outbuf[5] = (nb_sectors >> 16) & 0xff; |
874 |
outbuf[6] = (nb_sectors >> 8) & 0xff; |
875 |
outbuf[7] = nb_sectors & 0xff; |
876 |
outbuf[8] = 0; |
877 |
outbuf[9] = 0; |
878 |
outbuf[10] = s->cluster_size * 2; |
879 |
outbuf[11] = 0; |
880 |
/* Protection, exponent and lowest lba field left blank. */
|
881 |
r->iov.iov_len = len; |
882 |
} else {
|
883 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_NOT_READY); |
884 |
return 0; |
885 |
} |
886 |
break;
|
887 |
} |
888 |
DPRINTF("Unsupported Service Action In\n");
|
889 |
goto fail;
|
890 |
case 0xa0: |
891 |
DPRINTF("Report LUNs (len %d)\n", len);
|
892 |
if (len < 16) |
893 |
goto fail;
|
894 |
memset(outbuf, 0, 16); |
895 |
outbuf[3] = 8; |
896 |
r->iov.iov_len = 16;
|
897 |
break;
|
898 |
case 0x2f: |
899 |
DPRINTF("Verify (sector %d, count %d)\n", lba, len);
|
900 |
break;
|
901 |
default:
|
902 |
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
903 |
fail:
|
904 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_ILLEGAL_REQUEST); |
905 |
return 0; |
906 |
illegal_lba:
|
907 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR); |
908 |
return 0; |
909 |
} |
910 |
if (r->sector_count == 0 && r->iov.iov_len == 0) { |
911 |
scsi_command_complete(r, STATUS_GOOD, SENSE_NO_SENSE); |
912 |
} |
913 |
len = r->sector_count * 512 + r->iov.iov_len;
|
914 |
if (is_write) {
|
915 |
return -len;
|
916 |
} else {
|
917 |
if (!r->sector_count)
|
918 |
r->sector_count = -1;
|
919 |
return len;
|
920 |
} |
921 |
} |
922 |
|
923 |
static void scsi_destroy(SCSIDevice *d) |
924 |
{ |
925 |
qemu_free(d->state); |
926 |
qemu_free(d); |
927 |
} |
928 |
|
929 |
SCSIDevice *scsi_disk_init(BlockDriverState *bdrv, int tcq,
|
930 |
scsi_completionfn completion, void *opaque)
|
931 |
{ |
932 |
SCSIDevice *d; |
933 |
SCSIDeviceState *s; |
934 |
uint64_t nb_sectors; |
935 |
|
936 |
s = (SCSIDeviceState *)qemu_mallocz(sizeof(SCSIDeviceState));
|
937 |
s->bdrv = bdrv; |
938 |
s->tcq = tcq; |
939 |
s->completion = completion; |
940 |
s->opaque = opaque; |
941 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
942 |
s->cluster_size = 4;
|
943 |
} else {
|
944 |
s->cluster_size = 1;
|
945 |
} |
946 |
bdrv_get_geometry(s->bdrv, &nb_sectors); |
947 |
nb_sectors /= s->cluster_size; |
948 |
if (nb_sectors)
|
949 |
nb_sectors--; |
950 |
s->max_lba = nb_sectors; |
951 |
strncpy(s->drive_serial_str, drive_get_serial(s->bdrv), |
952 |
sizeof(s->drive_serial_str));
|
953 |
if (strlen(s->drive_serial_str) == 0) |
954 |
pstrcpy(s->drive_serial_str, sizeof(s->drive_serial_str), "0"); |
955 |
qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s); |
956 |
d = (SCSIDevice *)qemu_mallocz(sizeof(SCSIDevice));
|
957 |
d->state = s; |
958 |
d->destroy = scsi_destroy; |
959 |
d->send_command = scsi_send_command; |
960 |
d->read_data = scsi_read_data; |
961 |
d->write_data = scsi_write_data; |
962 |
d->cancel_io = scsi_cancel_io; |
963 |
d->get_buf = scsi_get_buf; |
964 |
|
965 |
return d;
|
966 |
} |