--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/qemu-symbian-svp/hw/scsi-disk.c Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,826 @@
+/*
+ * SCSI Device emulation
+ *
+ * Copyright (c) 2006 CodeSourcery.
+ * Based on code by Fabrice Bellard
+ *
+ * Written by Paul Brook
+ *
+ * This code is licenced under the LGPL.
+ *
+ * Note that this file only handles the SCSI architecture model and device
+ * commands. Emulation of interface/link layer protocols is handled by
+ * the host adapter emulator.
+ */
+
+//#define DEBUG_SCSI
+
+#ifdef DEBUG_SCSI
+#define DPRINTF(fmt, args...) \
+do { printf("scsi-disk: " fmt , ##args); } while (0)
+#else
+#define DPRINTF(fmt, args...) do {} while(0)
+#endif
+
+#define BADF(fmt, args...) \
+do { fprintf(stderr, "scsi-disk: " fmt , ##args); } while (0)
+
+#include "qemu-common.h"
+#include "block.h"
+#include "scsi-disk.h"
+
+#define SENSE_NO_SENSE 0
+#define SENSE_NOT_READY 2
+#define SENSE_HARDWARE_ERROR 4
+#define SENSE_ILLEGAL_REQUEST 5
+
+#define STATUS_GOOD 0
+#define STATUS_CHECK_CONDITION 2
+
+#define SCSI_DMA_BUF_SIZE 131072
+#define SCSI_MAX_INQUIRY_LEN 256
+
+typedef struct SCSIRequest {
+ SCSIDeviceState *dev;
+ uint32_t tag;
+ /* ??? We should probably keep track of whether the data trasfer is
+ a read or a write. Currently we rely on the host getting it right. */
+ /* Both sector and sector_count are in terms of qemu 512 byte blocks. */
+ int sector;
+ int sector_count;
+ /* The amounnt of data in the buffer. */
+ int buf_len;
+ uint8_t *dma_buf;
+ BlockDriverAIOCB *aiocb;
+ struct SCSIRequest *next;
+} SCSIRequest;
+
+struct SCSIDeviceState
+{
+ BlockDriverState *bdrv;
+ SCSIRequest *requests;
+ /* The qemu block layer uses a fixed 512 byte sector size.
+ This is the number of 512 byte blocks in a single scsi sector. */
+ int cluster_size;
+ int sense;
+ int tcq;
+ /* Completion functions may be called from either scsi_{read,write}_data
+ or from the AIO completion routines. */
+ scsi_completionfn completion;
+ void *opaque;
+};
+
+/* Global pool of SCSIRequest structures. */
+static SCSIRequest *free_requests = NULL;
+
+static SCSIRequest *scsi_new_request(SCSIDeviceState *s, uint32_t tag)
+{
+ SCSIRequest *r;
+
+ if (free_requests) {
+ r = free_requests;
+ free_requests = r->next;
+ } else {
+ r = qemu_malloc(sizeof(SCSIRequest));
+ r->dma_buf = qemu_memalign(512, SCSI_DMA_BUF_SIZE);
+ }
+ r->dev = s;
+ r->tag = tag;
+ r->sector_count = 0;
+ r->buf_len = 0;
+ r->aiocb = NULL;
+
+ r->next = s->requests;
+ s->requests = r;
+ return r;
+}
+
+static void scsi_remove_request(SCSIRequest *r)
+{
+ SCSIRequest *last;
+ SCSIDeviceState *s = r->dev;
+
+ if (s->requests == r) {
+ s->requests = r->next;
+ } else {
+ last = s->requests;
+ while (last && last->next != r)
+ last = last->next;
+ if (last) {
+ last->next = r->next;
+ } else {
+ BADF("Orphaned request\n");
+ }
+ }
+ r->next = free_requests;
+ free_requests = r;
+}
+
+static SCSIRequest *scsi_find_request(SCSIDeviceState *s, uint32_t tag)
+{
+ SCSIRequest *r;
+
+ r = s->requests;
+ while (r && r->tag != tag)
+ r = r->next;
+
+ return r;
+}
+
+/* Helper function for command completion. */
+static void scsi_command_complete(SCSIRequest *r, int status, int sense)
+{
+ SCSIDeviceState *s = r->dev;
+ uint32_t tag;
+ DPRINTF("Command complete tag=0x%x status=%d sense=%d\n", r->tag, status, sense);
+ s->sense = sense;
+ tag = r->tag;
+ scsi_remove_request(r);
+ s->completion(s->opaque, SCSI_REASON_DONE, tag, status);
+}
+
+/* Cancel a pending data transfer. */
+static void scsi_cancel_io(SCSIDevice *d, uint32_t tag)
+{
+ SCSIDeviceState *s = d->state;
+ SCSIRequest *r;
+ DPRINTF("Cancel tag=0x%x\n", tag);
+ r = scsi_find_request(s, tag);
+ if (r) {
+ if (r->aiocb)
+ bdrv_aio_cancel(r->aiocb);
+ r->aiocb = NULL;
+ scsi_remove_request(r);
+ }
+}
+
+static void scsi_read_complete(void * opaque, int ret)
+{
+ SCSIRequest *r = (SCSIRequest *)opaque;
+ SCSIDeviceState *s = r->dev;
+
+ if (ret) {
+ DPRINTF("IO error\n");
+ s->completion(s->opaque, SCSI_REASON_DATA, r->tag, 0);
+ scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_NO_SENSE);
+ return;
+ }
+ DPRINTF("Data ready tag=0x%x len=%d\n", r->tag, r->buf_len);
+
+ s->completion(s->opaque, SCSI_REASON_DATA, r->tag, r->buf_len);
+}
+
+/* Read more data from scsi device into buffer. */
+static void scsi_read_data(SCSIDevice *d, uint32_t tag)
+{
+ SCSIDeviceState *s = d->state;
+ SCSIRequest *r;
+ uint32_t n;
+
+ r = scsi_find_request(s, tag);
+ if (!r) {
+ BADF("Bad read tag 0x%x\n", tag);
+ /* ??? This is the wrong error. */
+ scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR);
+ return;
+ }
+ if (r->sector_count == (uint32_t)-1) {
+ DPRINTF("Read buf_len=%d\n", r->buf_len);
+ r->sector_count = 0;
+ s->completion(s->opaque, SCSI_REASON_DATA, r->tag, r->buf_len);
+ return;
+ }
+ DPRINTF("Read sector_count=%d\n", r->sector_count);
+ if (r->sector_count == 0) {
+ scsi_command_complete(r, STATUS_GOOD, SENSE_NO_SENSE);
+ return;
+ }
+
+ n = r->sector_count;
+ if (n > SCSI_DMA_BUF_SIZE / 512)
+ n = SCSI_DMA_BUF_SIZE / 512;
+
+ r->buf_len = n * 512;
+ r->aiocb = bdrv_aio_read(s->bdrv, r->sector, r->dma_buf, n,
+ scsi_read_complete, r);
+ if (r->aiocb == NULL)
+ scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR);
+ r->sector += n;
+ r->sector_count -= n;
+}
+
+static void scsi_write_complete(void * opaque, int ret)
+{
+ SCSIRequest *r = (SCSIRequest *)opaque;
+ SCSIDeviceState *s = r->dev;
+ uint32_t len;
+
+ if (ret) {
+ fprintf(stderr, "scsi-disc: IO write error\n");
+ exit(1);
+ }
+
+ r->aiocb = NULL;
+ if (r->sector_count == 0) {
+ scsi_command_complete(r, STATUS_GOOD, SENSE_NO_SENSE);
+ } else {
+ len = r->sector_count * 512;
+ if (len > SCSI_DMA_BUF_SIZE) {
+ len = SCSI_DMA_BUF_SIZE;
+ }
+ r->buf_len = len;
+ DPRINTF("Write complete tag=0x%x more=%d\n", r->tag, len);
+ s->completion(s->opaque, SCSI_REASON_DATA, r->tag, len);
+ }
+}
+
+/* Write data to a scsi device. Returns nonzero on failure.
+ The transfer may complete asynchronously. */
+static int scsi_write_data(SCSIDevice *d, uint32_t tag)
+{
+ SCSIDeviceState *s = d->state;
+ SCSIRequest *r;
+ uint32_t n;
+
+ DPRINTF("Write data tag=0x%x\n", tag);
+ r = scsi_find_request(s, tag);
+ if (!r) {
+ BADF("Bad write tag 0x%x\n", tag);
+ scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR);
+ return 1;
+ }
+ if (r->aiocb)
+ BADF("Data transfer already in progress\n");
+ n = r->buf_len / 512;
+ if (n) {
+ r->aiocb = bdrv_aio_write(s->bdrv, r->sector, r->dma_buf, n,
+ scsi_write_complete, r);
+ if (r->aiocb == NULL)
+ scsi_command_complete(r, STATUS_CHECK_CONDITION,
+ SENSE_HARDWARE_ERROR);
+ r->sector += n;
+ r->sector_count -= n;
+ } else {
+ /* Invoke completion routine to fetch data from host. */
+ scsi_write_complete(r, 0);
+ }
+
+ return 0;
+}
+
+/* Return a pointer to the data buffer. */
+static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
+{
+ SCSIDeviceState *s = d->state;
+ SCSIRequest *r;
+
+ r = scsi_find_request(s, tag);
+ if (!r) {
+ BADF("Bad buffer tag 0x%x\n", tag);
+ return NULL;
+ }
+ return r->dma_buf;
+}
+
+/* Execute a scsi command. Returns the length of the data expected by the
+ command. This will be Positive for data transfers from the device
+ (eg. disk reads), negative for transfers to the device (eg. disk writes),
+ and zero if the command does not transfer any data. */
+
+static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
+ uint8_t *buf, int lun)
+{
+ SCSIDeviceState *s = d->state;
+ uint64_t nb_sectors;
+ uint32_t lba;
+ uint32_t len;
+ int cmdlen;
+ int is_write;
+ uint8_t command;
+ uint8_t *outbuf;
+ SCSIRequest *r;
+
+ command = buf[0];
+ r = scsi_find_request(s, tag);
+ if (r) {
+ BADF("Tag 0x%x already in use\n", tag);
+ scsi_cancel_io(d, tag);
+ }
+ /* ??? Tags are not unique for different luns. We only implement a
+ single lun, so this should not matter. */
+ r = scsi_new_request(s, tag);
+ outbuf = r->dma_buf;
+ is_write = 0;
+ DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]);
+ switch (command >> 5) {
+ case 0:
+ lba = buf[3] | (buf[2] << 8) | ((buf[1] & 0x1f) << 16);
+ len = buf[4];
+ cmdlen = 6;
+ break;
+ case 1:
+ case 2:
+ lba = buf[5] | (buf[4] << 8) | (buf[3] << 16) | (buf[2] << 24);
+ len = buf[8] | (buf[7] << 8);
+ cmdlen = 10;
+ break;
+ case 4:
+ lba = buf[5] | (buf[4] << 8) | (buf[3] << 16) | (buf[2] << 24);
+ len = buf[13] | (buf[12] << 8) | (buf[11] << 16) | (buf[10] << 24);
+ cmdlen = 16;
+ break;
+ case 5:
+ lba = buf[5] | (buf[4] << 8) | (buf[3] << 16) | (buf[2] << 24);
+ len = buf[9] | (buf[8] << 8) | (buf[7] << 16) | (buf[6] << 24);
+ cmdlen = 12;
+ break;
+ default:
+ BADF("Unsupported command length, command %x\n", command);
+ goto fail;
+ }
+#ifdef DEBUG_SCSI
+ {
+ int i;
+ for (i = 1; i < cmdlen; i++) {
+ printf(" 0x%02x", buf[i]);
+ }
+ printf("\n");
+ }
+#endif
+ if (lun || buf[1] >> 5) {
+ /* Only LUN 0 supported. */
+ DPRINTF("Unimplemented LUN %d\n", lun ? lun : buf[1] >> 5);
+ if (command != 0x03 && command != 0x12) /* REQUEST SENSE and INQUIRY */
+ goto fail;
+ }
+ switch (command) {
+ case 0x0:
+ DPRINTF("Test Unit Ready\n");
+ break;
+ case 0x03:
+ DPRINTF("Request Sense (len %d)\n", len);
+ if (len < 4)
+ goto fail;
+ memset(outbuf, 0, 4);
+ outbuf[0] = 0xf0;
+ outbuf[1] = 0;
+ outbuf[2] = s->sense;
+ r->buf_len = 4;
+ break;
+ case 0x12:
+ DPRINTF("Inquiry (len %d)\n", len);
+ if (buf[1] & 0x2) {
+ /* Command support data - optional, not implemented */
+ BADF("optional INQUIRY command support request not implemented\n");
+ goto fail;
+ }
+ else if (buf[1] & 0x1) {
+ /* Vital product data */
+ uint8_t page_code = buf[2];
+ if (len < 4) {
+ BADF("Error: Inquiry (EVPD[%02X]) buffer size %d is "
+ "less than 4\n", page_code, len);
+ goto fail;
+ }
+
+ switch (page_code) {
+ case 0x00:
+ {
+ /* Supported page codes, mandatory */
+ DPRINTF("Inquiry EVPD[Supported pages] "
+ "buffer size %d\n", len);
+
+ r->buf_len = 0;
+
+ if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
+ outbuf[r->buf_len++] = 5;
+ } else {
+ outbuf[r->buf_len++] = 0;
+ }
+
+ outbuf[r->buf_len++] = 0x00; // this page
+ outbuf[r->buf_len++] = 0x00;
+ outbuf[r->buf_len++] = 3; // number of pages
+ outbuf[r->buf_len++] = 0x00; // list of supported pages (this page)
+ outbuf[r->buf_len++] = 0x80; // unit serial number
+ outbuf[r->buf_len++] = 0x83; // device identification
+ }
+ break;
+ case 0x80:
+ {
+ /* Device serial number, optional */
+ if (len < 4) {
+ BADF("Error: EVPD[Serial number] Inquiry buffer "
+ "size %d too small, %d needed\n", len, 4);
+ goto fail;
+ }
+
+ DPRINTF("Inquiry EVPD[Serial number] buffer size %d\n", len);
+
+ r->buf_len = 0;
+
+ /* Supported page codes */
+ if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
+ outbuf[r->buf_len++] = 5;
+ } else {
+ outbuf[r->buf_len++] = 0;
+ }
+
+ outbuf[r->buf_len++] = 0x80; // this page
+ outbuf[r->buf_len++] = 0x00;
+ outbuf[r->buf_len++] = 0x01; // 1 byte data follow
+
+ outbuf[r->buf_len++] = '0'; // 1 byte data follow
+ }
+
+ break;
+ case 0x83:
+ {
+ /* Device identification page, mandatory */
+ int max_len = 255 - 8;
+ int id_len = strlen(bdrv_get_device_name(s->bdrv));
+ if (id_len > max_len)
+ id_len = max_len;
+
+ DPRINTF("Inquiry EVPD[Device identification] "
+ "buffer size %d\n", len);
+ r->buf_len = 0;
+ if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
+ outbuf[r->buf_len++] = 5;
+ } else {
+ outbuf[r->buf_len++] = 0;
+ }
+
+ outbuf[r->buf_len++] = 0x83; // this page
+ outbuf[r->buf_len++] = 0x00;
+ outbuf[r->buf_len++] = 3 + id_len;
+
+ outbuf[r->buf_len++] = 0x2; // ASCII
+ outbuf[r->buf_len++] = 0; // not officially assigned
+ outbuf[r->buf_len++] = 0; // reserved
+ outbuf[r->buf_len++] = id_len; // length of data following
+
+ memcpy(&outbuf[r->buf_len],
+ bdrv_get_device_name(s->bdrv), id_len);
+ r->buf_len += id_len;
+ }
+ break;
+ default:
+ BADF("Error: unsupported Inquiry (EVPD[%02X]) "
+ "buffer size %d\n", page_code, len);
+ goto fail;
+ }
+ /* done with EVPD */
+ break;
+ }
+ else {
+ /* Standard INQUIRY data */
+ if (buf[2] != 0) {
+ BADF("Error: Inquiry (STANDARD) page or code "
+ "is non-zero [%02X]\n", buf[2]);
+ goto fail;
+ }
+
+ /* PAGE CODE == 0 */
+ if (len < 5) {
+ BADF("Error: Inquiry (STANDARD) buffer size %d "
+ "is less than 5\n", len);
+ goto fail;
+ }
+
+ if (len < 36) {
+ BADF("Error: Inquiry (STANDARD) buffer size %d "
+ "is less than 36 (TODO: only 5 required)\n", len);
+ }
+ }
+
+ if(len > SCSI_MAX_INQUIRY_LEN)
+ len = SCSI_MAX_INQUIRY_LEN;
+
+ memset(outbuf, 0, len);
+
+ if (lun || buf[1] >> 5) {
+ outbuf[0] = 0x7f; /* LUN not supported */
+ } else if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
+ outbuf[0] = 5;
+ outbuf[1] = 0x80;
+ memcpy(&outbuf[16], "QEMU CD-ROM ", 16);
+ } else {
+ outbuf[0] = 0;
+ memcpy(&outbuf[16], "QEMU HARDDISK ", 16);
+ }
+ memcpy(&outbuf[8], "QEMU ", 8);
+ memcpy(&outbuf[32], QEMU_VERSION, 4);
+ /* Identify device as SCSI-3 rev 1.
+ Some later commands are also implemented. */
+ outbuf[2] = 3;
+ outbuf[3] = 2; /* Format 2 */
+ outbuf[4] = len - 5; /* Additional Length = (Len - 1) - 4 */
+ /* Sync data transfer and TCQ. */
+ outbuf[7] = 0x10 | (s->tcq ? 0x02 : 0);
+ r->buf_len = len;
+ break;
+ case 0x16:
+ DPRINTF("Reserve(6)\n");
+ if (buf[1] & 1)
+ goto fail;
+ break;
+ case 0x17:
+ DPRINTF("Release(6)\n");
+ if (buf[1] & 1)
+ goto fail;
+ break;
+ case 0x1a:
+ case 0x5a:
+ {
+ uint8_t *p;
+ int page;
+
+ page = buf[2] & 0x3f;
+ DPRINTF("Mode Sense (page %d, len %d)\n", page, len);
+ p = outbuf;
+ memset(p, 0, 4);
+ outbuf[1] = 0; /* Default media type. */
+ outbuf[3] = 0; /* Block descriptor length. */
+ if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
+ outbuf[2] = 0x80; /* Readonly. */
+ }
+ p += 4;
+ if (page == 4) {
+ int cylinders, heads, secs;
+
+ /* Rigid disk device geometry page. */
+ p[0] = 4;
+ p[1] = 0x16;
+ /* if a geometry hint is available, use it */
+ bdrv_get_geometry_hint(s->bdrv, &cylinders, &heads, &secs);
+ p[2] = (cylinders >> 16) & 0xff;
+ p[3] = (cylinders >> 8) & 0xff;
+ p[4] = cylinders & 0xff;
+ p[5] = heads & 0xff;
+ /* Write precomp start cylinder, disabled */
+ p[6] = (cylinders >> 16) & 0xff;
+ p[7] = (cylinders >> 8) & 0xff;
+ p[8] = cylinders & 0xff;
+ /* Reduced current start cylinder, disabled */
+ p[9] = (cylinders >> 16) & 0xff;
+ p[10] = (cylinders >> 8) & 0xff;
+ p[11] = cylinders & 0xff;
+ /* Device step rate [ns], 200ns */
+ p[12] = 0;
+ p[13] = 200;
+ /* Landing zone cylinder */
+ p[14] = 0xff;
+ p[15] = 0xff;
+ p[16] = 0xff;
+ /* Medium rotation rate [rpm], 5400 rpm */
+ p[20] = (5400 >> 8) & 0xff;
+ p[21] = 5400 & 0xff;
+ p += 0x16;
+ } else if (page == 5) {
+ int cylinders, heads, secs;
+
+ /* Flexible disk device geometry page. */
+ p[0] = 5;
+ p[1] = 0x1e;
+ /* Transfer rate [kbit/s], 5Mbit/s */
+ p[2] = 5000 >> 8;
+ p[3] = 5000 & 0xff;
+ /* if a geometry hint is available, use it */
+ bdrv_get_geometry_hint(s->bdrv, &cylinders, &heads, &secs);
+ p[4] = heads & 0xff;
+ p[5] = secs & 0xff;
+ p[6] = s->cluster_size * 2;
+ p[8] = (cylinders >> 8) & 0xff;
+ p[9] = cylinders & 0xff;
+ /* Write precomp start cylinder, disabled */
+ p[10] = (cylinders >> 8) & 0xff;
+ p[11] = cylinders & 0xff;
+ /* Reduced current start cylinder, disabled */
+ p[12] = (cylinders >> 8) & 0xff;
+ p[13] = cylinders & 0xff;
+ /* Device step rate [100us], 100us */
+ p[14] = 0;
+ p[15] = 1;
+ /* Device step pulse width [us], 1us */
+ p[16] = 1;
+ /* Device head settle delay [100us], 100us */
+ p[17] = 0;
+ p[18] = 1;
+ /* Motor on delay [0.1s], 0.1s */
+ p[19] = 1;
+ /* Motor off delay [0.1s], 0.1s */
+ p[20] = 1;
+ /* Medium rotation rate [rpm], 5400 rpm */
+ p[28] = (5400 >> 8) & 0xff;
+ p[29] = 5400 & 0xff;
+ p += 0x1e;
+ } else if ((page == 8 || page == 0x3f)) {
+ /* Caching page. */
+ memset(p,0,20);
+ p[0] = 8;
+ p[1] = 0x12;
+ p[2] = 4; /* WCE */
+ p += 20;
+ }
+ if ((page == 0x3f || page == 0x2a)
+ && (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM)) {
+ /* CD Capabilities and Mechanical Status page. */
+ p[0] = 0x2a;
+ p[1] = 0x14;
+ p[2] = 3; // CD-R & CD-RW read
+ p[3] = 0; // Writing not supported
+ p[4] = 0x7f; /* Audio, composite, digital out,
+ mode 2 form 1&2, multi session */
+ p[5] = 0xff; /* CD DA, DA accurate, RW supported,
+ RW corrected, C2 errors, ISRC,
+ UPC, Bar code */
+ p[6] = 0x2d | (bdrv_is_locked(s->bdrv)? 2 : 0);
+ /* Locking supported, jumper present, eject, tray */
+ p[7] = 0; /* no volume & mute control, no
+ changer */
+ p[8] = (50 * 176) >> 8; // 50x read speed
+ p[9] = (50 * 176) & 0xff;
+ p[10] = 0 >> 8; // No volume
+ p[11] = 0 & 0xff;
+ p[12] = 2048 >> 8; // 2M buffer
+ p[13] = 2048 & 0xff;
+ p[14] = (16 * 176) >> 8; // 16x read speed current
+ p[15] = (16 * 176) & 0xff;
+ p[18] = (16 * 176) >> 8; // 16x write speed
+ p[19] = (16 * 176) & 0xff;
+ p[20] = (16 * 176) >> 8; // 16x write speed current
+ p[21] = (16 * 176) & 0xff;
+ p += 22;
+ }
+ r->buf_len = p - outbuf;
+ outbuf[0] = r->buf_len - 4;
+ if (r->buf_len > len)
+ r->buf_len = len;
+ }
+ break;
+ case 0x1b:
+ DPRINTF("Start Stop Unit\n");
+ break;
+ case 0x1e:
+ DPRINTF("Prevent Allow Medium Removal (prevent = %d)\n", buf[4] & 3);
+ bdrv_set_locked(s->bdrv, buf[4] & 1);
+ break;
+ case 0x25:
+ DPRINTF("Read Capacity\n");
+ /* The normal LEN field for this command is zero. */
+ memset(outbuf, 0, 8);
+ bdrv_get_geometry(s->bdrv, &nb_sectors);
+ /* Returned value is the address of the last sector. */
+ if (nb_sectors) {
+ nb_sectors--;
+ outbuf[0] = (nb_sectors >> 24) & 0xff;
+ outbuf[1] = (nb_sectors >> 16) & 0xff;
+ outbuf[2] = (nb_sectors >> 8) & 0xff;
+ outbuf[3] = nb_sectors & 0xff;
+ outbuf[4] = 0;
+ outbuf[5] = 0;
+ outbuf[6] = s->cluster_size * 2;
+ outbuf[7] = 0;
+ r->buf_len = 8;
+ } else {
+ scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_NOT_READY);
+ return 0;
+ }
+ break;
+ case 0x08:
+ case 0x28:
+ DPRINTF("Read (sector %d, count %d)\n", lba, len);
+ r->sector = lba * s->cluster_size;
+ r->sector_count = len * s->cluster_size;
+ break;
+ case 0x0a:
+ case 0x2a:
+ DPRINTF("Write (sector %d, count %d)\n", lba, len);
+ r->sector = lba * s->cluster_size;
+ r->sector_count = len * s->cluster_size;
+ is_write = 1;
+ break;
+ case 0x35:
+ DPRINTF("Synchronise cache (sector %d, count %d)\n", lba, len);
+ bdrv_flush(s->bdrv);
+ break;
+ case 0x43:
+ {
+ int start_track, format, msf, toclen;
+
+ msf = buf[1] & 2;
+ format = buf[2] & 0xf;
+ start_track = buf[6];
+ bdrv_get_geometry(s->bdrv, &nb_sectors);
+ DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1);
+ switch(format) {
+ case 0:
+ toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track);
+ break;
+ case 1:
+ /* multi session : only a single session defined */
+ toclen = 12;
+ memset(outbuf, 0, 12);
+ outbuf[1] = 0x0a;
+ outbuf[2] = 0x01;
+ outbuf[3] = 0x01;
+ break;
+ case 2:
+ toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track);
+ break;
+ default:
+ goto error_cmd;
+ }
+ if (toclen > 0) {
+ if (len > toclen)
+ len = toclen;
+ r->buf_len = len;
+ break;
+ }
+ error_cmd:
+ DPRINTF("Read TOC error\n");
+ goto fail;
+ }
+ case 0x46:
+ DPRINTF("Get Configuration (rt %d, maxlen %d)\n", buf[1] & 3, len);
+ memset(outbuf, 0, 8);
+ /* ??? This should probably return much more information. For now
+ just return the basic header indicating the CD-ROM profile. */
+ outbuf[7] = 8; // CD-ROM
+ r->buf_len = 8;
+ break;
+ case 0x56:
+ DPRINTF("Reserve(10)\n");
+ if (buf[1] & 3)
+ goto fail;
+ break;
+ case 0x57:
+ DPRINTF("Release(10)\n");
+ if (buf[1] & 3)
+ goto fail;
+ break;
+ case 0xa0:
+ DPRINTF("Report LUNs (len %d)\n", len);
+ if (len < 16)
+ goto fail;
+ memset(outbuf, 0, 16);
+ outbuf[3] = 8;
+ r->buf_len = 16;
+ break;
+ case 0x2f:
+ DPRINTF("Verify (sector %d, count %d)\n", lba, len);
+ break;
+ default:
+ DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]);
+ fail:
+ scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_ILLEGAL_REQUEST);
+ return 0;
+ }
+ if (r->sector_count == 0 && r->buf_len == 0) {
+ scsi_command_complete(r, STATUS_GOOD, SENSE_NO_SENSE);
+ }
+ len = r->sector_count * 512 + r->buf_len;
+ if (is_write) {
+ return -len;
+ } else {
+ if (!r->sector_count)
+ r->sector_count = -1;
+ return len;
+ }
+}
+
+static void scsi_destroy(SCSIDevice *d)
+{
+ qemu_free(d->state);
+ qemu_free(d);
+}
+
+SCSIDevice *scsi_disk_init(BlockDriverState *bdrv, int tcq,
+ scsi_completionfn completion, void *opaque)
+{
+ SCSIDevice *d;
+ SCSIDeviceState *s;
+
+ s = (SCSIDeviceState *)qemu_mallocz(sizeof(SCSIDeviceState));
+ s->bdrv = bdrv;
+ s->tcq = tcq;
+ s->completion = completion;
+ s->opaque = opaque;
+ if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
+ s->cluster_size = 4;
+ } else {
+ s->cluster_size = 1;
+ }
+
+ d = (SCSIDevice *)qemu_mallocz(sizeof(SCSIDevice));
+ d->state = s;
+ d->destroy = scsi_destroy;
+ d->send_command = scsi_send_command;
+ d->read_data = scsi_read_data;
+ d->write_data = scsi_write_data;
+ d->cancel_io = scsi_cancel_io;
+ d->get_buf = scsi_get_buf;
+
+ return d;
+}