| /* |
| * SCSI Device emulation |
| * |
| * Copyright (c) 2006 CodeSourcery. |
| * Based on code by Fabrice Bellard |
| * |
| * Written by Paul Brook |
| * Modifications: |
| * 2009-Dec-12 Artyom Tarasenko : implemented stamdard inquiry for the case |
| * when the allocation length of CDB is smaller |
| * than 36. |
| * 2009-Oct-13 Artyom Tarasenko : implemented the block descriptor in the |
| * MODE SENSE response. |
| * |
| * 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, ...) \ |
| do { printf("scsi-disk: " fmt , ## __VA_ARGS__); } while (0) |
| #else |
| #define DPRINTF(fmt, ...) do {} while(0) |
| #endif |
| |
| #define BADF(fmt, ...) \ |
| do { fprintf(stderr, "scsi-disk: " fmt , ## __VA_ARGS__); } while (0) |
| |
| #include "qemu-common.h" |
| #include "qemu-error.h" |
| #include "scsi.h" |
| #include "scsi-defs.h" |
| #include "sysemu.h" |
| |
| #define SCSI_DMA_BUF_SIZE 131072 |
| #define SCSI_MAX_INQUIRY_LEN 256 |
| |
| #define SCSI_REQ_STATUS_RETRY 0x01 |
| |
| typedef struct SCSIDiskState SCSIDiskState; |
| |
| typedef struct SCSIDiskReq { |
| SCSIRequest req; |
| /* ??? We should probably keep track of whether the data transfer 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. */ |
| uint64_t sector; |
| uint32_t sector_count; |
| struct iovec iov; |
| QEMUIOVector qiov; |
| uint32_t status; |
| } SCSIDiskReq; |
| |
| struct SCSIDiskState |
| { |
| SCSIDevice qdev; |
| BlockDriverState *bs; |
| /* 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; |
| uint64_t max_lba; |
| QEMUBH *bh; |
| char *version; |
| char *serial; |
| }; |
| |
| static SCSIDiskReq *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun) |
| { |
| SCSIRequest *req; |
| SCSIDiskReq *r; |
| |
| req = scsi_req_alloc(sizeof(SCSIDiskReq), d, tag, lun); |
| r = DO_UPCAST(SCSIDiskReq, req, req); |
| r->iov.iov_base = qemu_memalign(512, SCSI_DMA_BUF_SIZE); |
| return r; |
| } |
| |
| static void scsi_remove_request(SCSIDiskReq *r) |
| { |
| qemu_vfree(r->iov.iov_base); |
| scsi_req_free(&r->req); |
| } |
| |
| static SCSIDiskReq *scsi_find_request(SCSIDiskState *s, uint32_t tag) |
| { |
| return DO_UPCAST(SCSIDiskReq, req, scsi_req_find(&s->qdev, tag)); |
| } |
| |
| static void scsi_req_set_status(SCSIRequest *req, int status, int sense_code) |
| { |
| req->status = status; |
| scsi_dev_set_sense(req->dev, sense_code); |
| } |
| |
| /* Helper function for command completion. */ |
| static void scsi_command_complete(SCSIDiskReq *r, int status, int sense) |
| { |
| DPRINTF("Command complete tag=0x%x status=%d sense=%d\n", |
| r->req.tag, status, sense); |
| scsi_req_set_status(&r->req, status, sense); |
| scsi_req_complete(&r->req); |
| scsi_remove_request(r); |
| } |
| |
| /* Cancel a pending data transfer. */ |
| static void scsi_cancel_io(SCSIDevice *d, uint32_t tag) |
| { |
| SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
| SCSIDiskReq *r; |
| DPRINTF("Cancel tag=0x%x\n", tag); |
| r = scsi_find_request(s, tag); |
| if (r) { |
| if (r->req.aiocb) |
| bdrv_aio_cancel(r->req.aiocb); |
| r->req.aiocb = NULL; |
| scsi_remove_request(r); |
| } |
| } |
| |
| static void scsi_read_complete(void * opaque, int ret) |
| { |
| SCSIDiskReq *r = (SCSIDiskReq *)opaque; |
| |
| r->req.aiocb = NULL; |
| |
| if (ret) { |
| DPRINTF("IO error\n"); |
| r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, 0); |
| scsi_command_complete(r, CHECK_CONDITION, NO_SENSE); |
| return; |
| } |
| DPRINTF("Data ready tag=0x%x len=%" PRId64 "\n", r->req.tag, r->iov.iov_len); |
| |
| r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len); |
| } |
| |
| /* Read more data from scsi device into buffer. */ |
| static void scsi_read_data(SCSIDevice *d, uint32_t tag) |
| { |
| SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
| SCSIDiskReq *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, CHECK_CONDITION, HARDWARE_ERROR); |
| return; |
| } |
| if (r->sector_count == (uint32_t)-1) { |
| DPRINTF("Read buf_len=%" PRId64 "\n", r->iov.iov_len); |
| r->sector_count = 0; |
| r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len); |
| return; |
| } |
| DPRINTF("Read sector_count=%d\n", r->sector_count); |
| if (r->sector_count == 0) { |
| scsi_command_complete(r, GOOD, NO_SENSE); |
| return; |
| } |
| |
| n = r->sector_count; |
| if (n > SCSI_DMA_BUF_SIZE / 512) |
| n = SCSI_DMA_BUF_SIZE / 512; |
| |
| r->iov.iov_len = n * 512; |
| qemu_iovec_init_external(&r->qiov, &r->iov, 1); |
| r->req.aiocb = bdrv_aio_readv(s->bs, r->sector, &r->qiov, n, |
| scsi_read_complete, r); |
| if (r->req.aiocb == NULL) |
| scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
| r->sector += n; |
| r->sector_count -= n; |
| } |
| |
| static int scsi_handle_write_error(SCSIDiskReq *r, int error) |
| { |
| SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
| BlockErrorAction action = bdrv_get_on_error(s->bs, 0); |
| |
| if (action == BLOCK_ERR_IGNORE) { |
| bdrv_mon_event(s->bs, BDRV_ACTION_IGNORE, 0); |
| return 0; |
| } |
| |
| if ((error == ENOSPC && action == BLOCK_ERR_STOP_ENOSPC) |
| || action == BLOCK_ERR_STOP_ANY) { |
| r->status |= SCSI_REQ_STATUS_RETRY; |
| bdrv_mon_event(s->bs, BDRV_ACTION_STOP, 0); |
| vm_stop(0); |
| } else { |
| scsi_command_complete(r, CHECK_CONDITION, |
| HARDWARE_ERROR); |
| bdrv_mon_event(s->bs, BDRV_ACTION_REPORT, 0); |
| } |
| |
| return 1; |
| } |
| |
| static void scsi_write_complete(void * opaque, int ret) |
| { |
| SCSIDiskReq *r = (SCSIDiskReq *)opaque; |
| uint32_t len; |
| uint32_t n; |
| |
| r->req.aiocb = NULL; |
| |
| if (ret) { |
| if (scsi_handle_write_error(r, -ret)) |
| return; |
| } |
| |
| n = r->iov.iov_len / 512; |
| r->sector += n; |
| r->sector_count -= n; |
| if (r->sector_count == 0) { |
| scsi_command_complete(r, GOOD, NO_SENSE); |
| } else { |
| len = r->sector_count * 512; |
| if (len > SCSI_DMA_BUF_SIZE) { |
| len = SCSI_DMA_BUF_SIZE; |
| } |
| r->iov.iov_len = len; |
| DPRINTF("Write complete tag=0x%x more=%d\n", r->req.tag, len); |
| r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, len); |
| } |
| } |
| |
| static void scsi_write_request(SCSIDiskReq *r) |
| { |
| SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
| uint32_t n; |
| |
| n = r->iov.iov_len / 512; |
| if (n) { |
| qemu_iovec_init_external(&r->qiov, &r->iov, 1); |
| r->req.aiocb = bdrv_aio_writev(s->bs, r->sector, &r->qiov, n, |
| scsi_write_complete, r); |
| if (r->req.aiocb == NULL) |
| scsi_command_complete(r, CHECK_CONDITION, |
| HARDWARE_ERROR); |
| } else { |
| /* Invoke completion routine to fetch data from host. */ |
| scsi_write_complete(r, 0); |
| } |
| } |
| |
| /* 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) |
| { |
| SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
| SCSIDiskReq *r; |
| |
| 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, CHECK_CONDITION, HARDWARE_ERROR); |
| return 1; |
| } |
| |
| if (r->req.aiocb) |
| BADF("Data transfer already in progress\n"); |
| |
| scsi_write_request(r); |
| |
| return 0; |
| } |
| |
| static void scsi_dma_restart_bh(void *opaque) |
| { |
| SCSIDiskState *s = opaque; |
| SCSIRequest *req; |
| SCSIDiskReq *r; |
| |
| qemu_bh_delete(s->bh); |
| s->bh = NULL; |
| |
| QTAILQ_FOREACH(req, &s->qdev.requests, next) { |
| r = DO_UPCAST(SCSIDiskReq, req, req); |
| if (r->status & SCSI_REQ_STATUS_RETRY) { |
| r->status &= ~SCSI_REQ_STATUS_RETRY; |
| scsi_write_request(r); |
| } |
| } |
| } |
| |
| static void scsi_dma_restart_cb(void *opaque, int running, int reason) |
| { |
| SCSIDiskState *s = opaque; |
| |
| if (!running) |
| return; |
| |
| if (!s->bh) { |
| s->bh = qemu_bh_new(scsi_dma_restart_bh, s); |
| qemu_bh_schedule(s->bh); |
| } |
| } |
| |
| /* Return a pointer to the data buffer. */ |
| static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag) |
| { |
| SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
| SCSIDiskReq *r; |
| |
| r = scsi_find_request(s, tag); |
| if (!r) { |
| BADF("Bad buffer tag 0x%x\n", tag); |
| return NULL; |
| } |
| return (uint8_t *)r->iov.iov_base; |
| } |
| |
| static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf) |
| { |
| SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| int buflen = 0; |
| |
| if (req->cmd.buf[1] & 0x2) { |
| /* Command support data - optional, not implemented */ |
| BADF("optional INQUIRY command support request not implemented\n"); |
| return -1; |
| } |
| |
| if (req->cmd.buf[1] & 0x1) { |
| /* Vital product data */ |
| uint8_t page_code = req->cmd.buf[2]; |
| if (req->cmd.xfer < 4) { |
| BADF("Error: Inquiry (EVPD[%02X]) buffer size %zd is " |
| "less than 4\n", page_code, req->cmd.xfer); |
| return -1; |
| } |
| |
| if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) { |
| outbuf[buflen++] = 5; |
| } else { |
| outbuf[buflen++] = 0; |
| } |
| outbuf[buflen++] = page_code ; // this page |
| outbuf[buflen++] = 0x00; |
| |
| switch (page_code) { |
| case 0x00: /* Supported page codes, mandatory */ |
| DPRINTF("Inquiry EVPD[Supported pages] " |
| "buffer size %zd\n", req->cmd.xfer); |
| outbuf[buflen++] = 4; // number of pages |
| outbuf[buflen++] = 0x00; // list of supported pages (this page) |
| outbuf[buflen++] = 0x80; // unit serial number |
| outbuf[buflen++] = 0x83; // device identification |
| outbuf[buflen++] = 0xb0; // block device characteristics |
| break; |
| |
| case 0x80: /* Device serial number, optional */ |
| { |
| int l = strlen(s->serial); |
| |
| if (l > req->cmd.xfer) |
| l = req->cmd.xfer; |
| if (l > 20) |
| l = 20; |
| |
| DPRINTF("Inquiry EVPD[Serial number] " |
| "buffer size %zd\n", req->cmd.xfer); |
| outbuf[buflen++] = l; |
| memcpy(outbuf+buflen, s->serial, l); |
| buflen += l; |
| break; |
| } |
| |
| case 0x83: /* Device identification page, mandatory */ |
| { |
| int max_len = 255 - 8; |
| int id_len = strlen(bdrv_get_device_name(s->bs)); |
| |
| if (id_len > max_len) |
| id_len = max_len; |
| DPRINTF("Inquiry EVPD[Device identification] " |
| "buffer size %zd\n", req->cmd.xfer); |
| |
| outbuf[buflen++] = 3 + id_len; |
| outbuf[buflen++] = 0x2; // ASCII |
| outbuf[buflen++] = 0; // not officially assigned |
| outbuf[buflen++] = 0; // reserved |
| outbuf[buflen++] = id_len; // length of data following |
| |
| memcpy(outbuf+buflen, bdrv_get_device_name(s->bs), id_len); |
| buflen += id_len; |
| break; |
| } |
| case 0xb0: /* block device characteristics */ |
| { |
| unsigned int min_io_size = |
| s->qdev.conf.min_io_size / s->qdev.blocksize; |
| unsigned int opt_io_size = |
| s->qdev.conf.opt_io_size / s->qdev.blocksize; |
| |
| /* required VPD size with unmap support */ |
| outbuf[3] = buflen = 0x3c; |
| |
| memset(outbuf + 4, 0, buflen - 4); |
| |
| /* optimal transfer length granularity */ |
| outbuf[6] = (min_io_size >> 8) & 0xff; |
| outbuf[7] = min_io_size & 0xff; |
| |
| /* optimal transfer length */ |
| outbuf[12] = (opt_io_size >> 24) & 0xff; |
| outbuf[13] = (opt_io_size >> 16) & 0xff; |
| outbuf[14] = (opt_io_size >> 8) & 0xff; |
| outbuf[15] = opt_io_size & 0xff; |
| break; |
| } |
| default: |
| BADF("Error: unsupported Inquiry (EVPD[%02X]) " |
| "buffer size %zd\n", page_code, req->cmd.xfer); |
| return -1; |
| } |
| /* done with EVPD */ |
| return buflen; |
| } |
| |
| /* Standard INQUIRY data */ |
| if (req->cmd.buf[2] != 0) { |
| BADF("Error: Inquiry (STANDARD) page or code " |
| "is non-zero [%02X]\n", req->cmd.buf[2]); |
| return -1; |
| } |
| |
| /* PAGE CODE == 0 */ |
| if (req->cmd.xfer < 5) { |
| BADF("Error: Inquiry (STANDARD) buffer size %zd " |
| "is less than 5\n", req->cmd.xfer); |
| return -1; |
| } |
| |
| buflen = req->cmd.xfer; |
| if (buflen > SCSI_MAX_INQUIRY_LEN) |
| buflen = SCSI_MAX_INQUIRY_LEN; |
| |
| memset(outbuf, 0, buflen); |
| |
| if (req->lun || req->cmd.buf[1] >> 5) { |
| outbuf[0] = 0x7f; /* LUN not supported */ |
| return buflen; |
| } |
| |
| if (bdrv_get_type_hint(s->bs) == 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); |
| memset(&outbuf[32], 0, 4); |
| memcpy(&outbuf[32], s->version, MIN(4, strlen(s->version))); |
| /* |
| * We claim conformance to SPC-3, which is required for guests |
| * to ask for modern features like READ CAPACITY(16) or the |
| * block characteristics VPD page by default. Not all of SPC-3 |
| * is actually implemented, but we're good enough. |
| */ |
| outbuf[2] = 5; |
| outbuf[3] = 2; /* Format 2 */ |
| |
| if (buflen > 36) { |
| outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */ |
| } else { |
| /* If the allocation length of CDB is too small, |
| the additional length is not adjusted */ |
| outbuf[4] = 36 - 5; |
| } |
| |
| /* Sync data transfer and TCQ. */ |
| outbuf[7] = 0x10 | (req->bus->tcq ? 0x02 : 0); |
| return buflen; |
| } |
| |
| static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p) |
| { |
| SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| BlockDriverState *bdrv = s->bs; |
| int cylinders, heads, secs; |
| |
| switch (page) { |
| case 4: /* Rigid disk device geometry page. */ |
| p[0] = 4; |
| p[1] = 0x16; |
| /* if a geometry hint is available, use it */ |
| bdrv_get_geometry_hint(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; |
| return 0x16; |
| |
| case 5: /* 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(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; |
| return 0x1e; |
| |
| case 8: /* Caching page. */ |
| p[0] = 8; |
| p[1] = 0x12; |
| if (bdrv_enable_write_cache(s->bs)) { |
| p[2] = 4; /* WCE */ |
| } |
| return 20; |
| |
| case 0x2a: /* CD Capabilities and Mechanical Status page. */ |
| if (bdrv_get_type_hint(bdrv) != BDRV_TYPE_CDROM) |
| return 0; |
| 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->bs)? 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; |
| return 22; |
| |
| default: |
| return 0; |
| } |
| } |
| |
| static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf) |
| { |
| SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| uint64_t nb_sectors; |
| int page, dbd, buflen; |
| uint8_t *p; |
| |
| dbd = req->cmd.buf[1] & 0x8; |
| page = req->cmd.buf[2] & 0x3f; |
| DPRINTF("Mode Sense (page %d, len %zd)\n", page, req->cmd.xfer); |
| memset(outbuf, 0, req->cmd.xfer); |
| p = outbuf; |
| |
| p[1] = 0; /* Default media type. */ |
| p[3] = 0; /* Block descriptor length. */ |
| if (bdrv_is_read_only(s->bs)) { |
| p[2] = 0x80; /* Readonly. */ |
| } |
| p += 4; |
| |
| bdrv_get_geometry(s->bs, &nb_sectors); |
| if ((~dbd) & nb_sectors) { |
| outbuf[3] = 8; /* Block descriptor length */ |
| nb_sectors /= s->cluster_size; |
| nb_sectors--; |
| if (nb_sectors > 0xffffff) |
| nb_sectors = 0xffffff; |
| p[0] = 0; /* media density code */ |
| p[1] = (nb_sectors >> 16) & 0xff; |
| p[2] = (nb_sectors >> 8) & 0xff; |
| p[3] = nb_sectors & 0xff; |
| p[4] = 0; /* reserved */ |
| p[5] = 0; /* bytes 5-7 are the sector size in bytes */ |
| p[6] = s->cluster_size * 2; |
| p[7] = 0; |
| p += 8; |
| } |
| |
| switch (page) { |
| case 0x04: |
| case 0x05: |
| case 0x08: |
| case 0x2a: |
| p += mode_sense_page(req, page, p); |
| break; |
| case 0x3f: |
| p += mode_sense_page(req, 0x08, p); |
| p += mode_sense_page(req, 0x2a, p); |
| break; |
| } |
| |
| buflen = p - outbuf; |
| outbuf[0] = buflen - 4; |
| if (buflen > req->cmd.xfer) |
| buflen = req->cmd.xfer; |
| return buflen; |
| } |
| |
| static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf) |
| { |
| SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| int start_track, format, msf, toclen; |
| uint64_t nb_sectors; |
| |
| msf = req->cmd.buf[1] & 2; |
| format = req->cmd.buf[2] & 0xf; |
| start_track = req->cmd.buf[6]; |
| bdrv_get_geometry(s->bs, &nb_sectors); |
| DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
| nb_sectors /= s->cluster_size; |
| 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: |
| return -1; |
| } |
| if (toclen > req->cmd.xfer) |
| toclen = req->cmd.xfer; |
| return toclen; |
| } |
| |
| static int scsi_disk_emulate_command(SCSIRequest *req, uint8_t *outbuf) |
| { |
| SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| uint64_t nb_sectors; |
| int buflen = 0; |
| |
| switch (req->cmd.buf[0]) { |
| case TEST_UNIT_READY: |
| if (!bdrv_is_inserted(s->bs)) |
| goto not_ready; |
| break; |
| case REQUEST_SENSE: |
| if (req->cmd.xfer < 4) |
| goto illegal_request; |
| memset(outbuf, 0, 4); |
| buflen = 4; |
| if (req->dev->sense.key == NOT_READY && req->cmd.xfer >= 18) { |
| memset(outbuf, 0, 18); |
| buflen = 18; |
| outbuf[7] = 10; |
| /* asc 0x3a, ascq 0: Medium not present */ |
| outbuf[12] = 0x3a; |
| outbuf[13] = 0; |
| } |
| outbuf[0] = 0xf0; |
| outbuf[1] = 0; |
| outbuf[2] = req->dev->sense.key; |
| scsi_dev_clear_sense(req->dev); |
| break; |
| case INQUIRY: |
| buflen = scsi_disk_emulate_inquiry(req, outbuf); |
| if (buflen < 0) |
| goto illegal_request; |
| break; |
| case MODE_SENSE: |
| case MODE_SENSE_10: |
| buflen = scsi_disk_emulate_mode_sense(req, outbuf); |
| if (buflen < 0) |
| goto illegal_request; |
| break; |
| case READ_TOC: |
| buflen = scsi_disk_emulate_read_toc(req, outbuf); |
| if (buflen < 0) |
| goto illegal_request; |
| break; |
| case RESERVE: |
| if (req->cmd.buf[1] & 1) |
| goto illegal_request; |
| break; |
| case RESERVE_10: |
| if (req->cmd.buf[1] & 3) |
| goto illegal_request; |
| break; |
| case RELEASE: |
| if (req->cmd.buf[1] & 1) |
| goto illegal_request; |
| break; |
| case RELEASE_10: |
| if (req->cmd.buf[1] & 3) |
| goto illegal_request; |
| break; |
| case START_STOP: |
| if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM && (req->cmd.buf[4] & 2)) { |
| /* load/eject medium */ |
| bdrv_eject(s->bs, !(req->cmd.buf[4] & 1)); |
| } |
| break; |
| case ALLOW_MEDIUM_REMOVAL: |
| bdrv_set_locked(s->bs, req->cmd.buf[4] & 1); |
| break; |
| case READ_CAPACITY: |
| /* The normal LEN field for this command is zero. */ |
| memset(outbuf, 0, 8); |
| bdrv_get_geometry(s->bs, &nb_sectors); |
| if (!nb_sectors) |
| goto not_ready; |
| nb_sectors /= s->cluster_size; |
| /* Returned value is the address of the last sector. */ |
| nb_sectors--; |
| /* Remember the new size for read/write sanity checking. */ |
| s->max_lba = nb_sectors; |
| /* Clip to 2TB, instead of returning capacity modulo 2TB. */ |
| if (nb_sectors > UINT32_MAX) |
| nb_sectors = UINT32_MAX; |
| 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; |
| buflen = 8; |
| break; |
| case SYNCHRONIZE_CACHE: |
| bdrv_flush(s->bs); |
| break; |
| case GET_CONFIGURATION: |
| 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 |
| buflen = 8; |
| break; |
| case SERVICE_ACTION_IN: |
| /* Service Action In subcommands. */ |
| if ((req->cmd.buf[1] & 31) == 0x10) { |
| DPRINTF("SAI READ CAPACITY(16)\n"); |
| memset(outbuf, 0, req->cmd.xfer); |
| bdrv_get_geometry(s->bs, &nb_sectors); |
| if (!nb_sectors) |
| goto not_ready; |
| nb_sectors /= s->cluster_size; |
| /* Returned value is the address of the last sector. */ |
| nb_sectors--; |
| /* Remember the new size for read/write sanity checking. */ |
| s->max_lba = nb_sectors; |
| outbuf[0] = (nb_sectors >> 56) & 0xff; |
| outbuf[1] = (nb_sectors >> 48) & 0xff; |
| outbuf[2] = (nb_sectors >> 40) & 0xff; |
| outbuf[3] = (nb_sectors >> 32) & 0xff; |
| outbuf[4] = (nb_sectors >> 24) & 0xff; |
| outbuf[5] = (nb_sectors >> 16) & 0xff; |
| outbuf[6] = (nb_sectors >> 8) & 0xff; |
| outbuf[7] = nb_sectors & 0xff; |
| outbuf[8] = 0; |
| outbuf[9] = 0; |
| outbuf[10] = s->cluster_size * 2; |
| outbuf[11] = 0; |
| outbuf[12] = 0; |
| outbuf[13] = get_physical_block_exp(&s->qdev.conf); |
| /* Protection, exponent and lowest lba field left blank. */ |
| buflen = req->cmd.xfer; |
| break; |
| } |
| DPRINTF("Unsupported Service Action In\n"); |
| goto illegal_request; |
| case REPORT_LUNS: |
| if (req->cmd.xfer < 16) |
| goto illegal_request; |
| memset(outbuf, 0, 16); |
| outbuf[3] = 8; |
| buflen = 16; |
| break; |
| case VERIFY: |
| break; |
| default: |
| goto illegal_request; |
| } |
| scsi_req_set_status(req, GOOD, NO_SENSE); |
| return buflen; |
| |
| not_ready: |
| scsi_req_set_status(req, CHECK_CONDITION, NOT_READY); |
| return 0; |
| |
| illegal_request: |
| scsi_req_set_status(req, CHECK_CONDITION, ILLEGAL_REQUEST); |
| return 0; |
| } |
| |
| /* 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) |
| { |
| SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
| uint64_t lba; |
| uint32_t len; |
| int cmdlen; |
| int is_write; |
| uint8_t command; |
| uint8_t *outbuf; |
| SCSIDiskReq *r; |
| int rc; |
| |
| 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(d, tag, lun); |
| outbuf = (uint8_t *)r->iov.iov_base; |
| is_write = 0; |
| DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]); |
| switch (command >> 5) { |
| case 0: |
| lba = (uint64_t) buf[3] | ((uint64_t) buf[2] << 8) | |
| (((uint64_t) buf[1] & 0x1f) << 16); |
| len = buf[4]; |
| cmdlen = 6; |
| break; |
| case 1: |
| case 2: |
| lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
| ((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
| len = buf[8] | (buf[7] << 8); |
| cmdlen = 10; |
| break; |
| case 4: |
| lba = (uint64_t) buf[9] | ((uint64_t) buf[8] << 8) | |
| ((uint64_t) buf[7] << 16) | ((uint64_t) buf[6] << 24) | |
| ((uint64_t) buf[5] << 32) | ((uint64_t) buf[4] << 40) | |
| ((uint64_t) buf[3] << 48) | ((uint64_t) buf[2] << 56); |
| len = buf[13] | (buf[12] << 8) | (buf[11] << 16) | (buf[10] << 24); |
| cmdlen = 16; |
| break; |
| case 5: |
| lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
| ((uint64_t) buf[3] << 16) | ((uint64_t) 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 (scsi_req_parse(&r->req, buf) != 0) { |
| BADF("Unsupported command length, command %x\n", command); |
| goto fail; |
| } |
| assert(r->req.cmd.len == cmdlen); |
| assert(r->req.cmd.lba == lba); |
| |
| if (lun || buf[1] >> 5) { |
| /* Only LUN 0 supported. */ |
| DPRINTF("Unimplemented LUN %d\n", lun ? lun : buf[1] >> 5); |
| if (command != REQUEST_SENSE && command != INQUIRY) |
| goto fail; |
| } |
| switch (command) { |
| case TEST_UNIT_READY: |
| case REQUEST_SENSE: |
| case INQUIRY: |
| case MODE_SENSE: |
| case MODE_SENSE_10: |
| case RESERVE: |
| case RESERVE_10: |
| case RELEASE: |
| case RELEASE_10: |
| case START_STOP: |
| case ALLOW_MEDIUM_REMOVAL: |
| case READ_CAPACITY: |
| case SYNCHRONIZE_CACHE: |
| case READ_TOC: |
| case GET_CONFIGURATION: |
| case SERVICE_ACTION_IN: |
| case REPORT_LUNS: |
| case VERIFY: |
| rc = scsi_disk_emulate_command(&r->req, outbuf); |
| if (rc > 0) { |
| r->iov.iov_len = rc; |
| } else { |
| scsi_req_complete(&r->req); |
| scsi_remove_request(r); |
| return 0; |
| } |
| break; |
| case READ_6: |
| case READ_10: |
| case READ_12: |
| case READ_16: |
| DPRINTF("Read (sector %" PRId64 ", count %d)\n", lba, len); |
| if (lba > s->max_lba) |
| goto illegal_lba; |
| r->sector = lba * s->cluster_size; |
| r->sector_count = len * s->cluster_size; |
| break; |
| case WRITE_6: |
| case WRITE_10: |
| case WRITE_12: |
| case WRITE_16: |
| DPRINTF("Write (sector %" PRId64 ", count %d)\n", lba, len); |
| if (lba > s->max_lba) |
| goto illegal_lba; |
| r->sector = lba * s->cluster_size; |
| r->sector_count = len * s->cluster_size; |
| is_write = 1; |
| break; |
| default: |
| DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
| fail: |
| scsi_command_complete(r, CHECK_CONDITION, ILLEGAL_REQUEST); |
| return 0; |
| illegal_lba: |
| scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
| return 0; |
| } |
| if (r->sector_count == 0 && r->iov.iov_len == 0) { |
| scsi_command_complete(r, GOOD, NO_SENSE); |
| } |
| len = r->sector_count * 512 + r->iov.iov_len; |
| if (is_write) { |
| return -len; |
| } else { |
| if (!r->sector_count) |
| r->sector_count = -1; |
| return len; |
| } |
| } |
| |
| static void scsi_disk_purge_requests(SCSIDiskState *s) |
| { |
| SCSIDiskReq *r; |
| |
| while (!QTAILQ_EMPTY(&s->qdev.requests)) { |
| r = DO_UPCAST(SCSIDiskReq, req, QTAILQ_FIRST(&s->qdev.requests)); |
| if (r->req.aiocb) { |
| bdrv_aio_cancel(r->req.aiocb); |
| } |
| scsi_remove_request(r); |
| } |
| } |
| |
| static void scsi_disk_reset(DeviceState *dev) |
| { |
| SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev); |
| uint64_t nb_sectors; |
| |
| scsi_disk_purge_requests(s); |
| |
| bdrv_get_geometry(s->bs, &nb_sectors); |
| nb_sectors /= s->cluster_size; |
| if (nb_sectors) { |
| nb_sectors--; |
| } |
| s->max_lba = nb_sectors; |
| } |
| |
| static void scsi_destroy(SCSIDevice *dev) |
| { |
| SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
| |
| scsi_disk_purge_requests(s); |
| blockdev_mark_auto_del(s->qdev.conf.bs); |
| } |
| |
| static int scsi_disk_initfn(SCSIDevice *dev) |
| { |
| SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
| int is_cd; |
| DriveInfo *dinfo; |
| |
| if (!s->qdev.conf.bs) { |
| error_report("scsi-disk: drive property not set"); |
| return -1; |
| } |
| s->bs = s->qdev.conf.bs; |
| is_cd = bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM; |
| |
| if (!s->serial) { |
| /* try to fall back to value set with legacy -drive serial=... */ |
| dinfo = drive_get_by_blockdev(s->bs); |
| s->serial = qemu_strdup(*dinfo->serial ? dinfo->serial : "0"); |
| } |
| |
| if (!s->version) { |
| s->version = qemu_strdup(QEMU_VERSION); |
| } |
| |
| if (bdrv_is_sg(s->bs)) { |
| error_report("scsi-disk: unwanted /dev/sg*"); |
| return -1; |
| } |
| |
| if (is_cd) { |
| s->qdev.blocksize = 2048; |
| } else { |
| s->qdev.blocksize = s->qdev.conf.logical_block_size; |
| } |
| s->cluster_size = s->qdev.blocksize / 512; |
| |
| s->qdev.type = TYPE_DISK; |
| qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s); |
| bdrv_set_removable(s->bs, is_cd); |
| return 0; |
| } |
| |
| static SCSIDeviceInfo scsi_disk_info = { |
| .qdev.name = "scsi-disk", |
| .qdev.desc = "virtual scsi disk or cdrom", |
| .qdev.size = sizeof(SCSIDiskState), |
| .qdev.reset = scsi_disk_reset, |
| .init = scsi_disk_initfn, |
| .destroy = scsi_destroy, |
| .send_command = scsi_send_command, |
| .read_data = scsi_read_data, |
| .write_data = scsi_write_data, |
| .cancel_io = scsi_cancel_io, |
| .get_buf = scsi_get_buf, |
| .qdev.props = (Property[]) { |
| DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf), |
| DEFINE_PROP_STRING("ver", SCSIDiskState, version), |
| DEFINE_PROP_STRING("serial", SCSIDiskState, serial), |
| DEFINE_PROP_END_OF_LIST(), |
| }, |
| }; |
| |
| static void scsi_disk_register_devices(void) |
| { |
| scsi_qdev_register(&scsi_disk_info); |
| } |
| device_init(scsi_disk_register_devices) |
