diff options
Diffstat (limited to 'hw/scsi-disk.c')
| -rw-r--r-- | hw/scsi-disk.c | 90 |
1 files changed, 71 insertions, 19 deletions
diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c index f43f2d097c..b64dd31463 100644 --- a/hw/scsi-disk.c +++ b/hw/scsi-disk.c @@ -485,16 +485,26 @@ static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf) return buflen; } -static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p) +static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p, + int page_control) { SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); BlockDriverState *bdrv = s->bs; int cylinders, heads, secs; + /* + * If Changeable Values are requested, a mask denoting those mode parameters + * that are changeable shall be returned. As we currently don't support + * parameter changes via MODE_SELECT all bits are returned set to zero. + * The buffer was already menset to zero by the caller of this function. + */ switch (page) { case 4: /* Rigid disk device geometry page. */ p[0] = 4; p[1] = 0x16; + if (page_control == 1) { /* Changeable Values */ + return p[1] + 2; + } /* if a geometry hint is available, use it */ bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); p[2] = (cylinders >> 16) & 0xff; @@ -519,11 +529,14 @@ static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p) /* Medium rotation rate [rpm], 5400 rpm */ p[20] = (5400 >> 8) & 0xff; p[21] = 5400 & 0xff; - return 0x16; + return p[1] + 2; case 5: /* Flexible disk device geometry page. */ p[0] = 5; p[1] = 0x1e; + if (page_control == 1) { /* Changeable Values */ + return p[1] + 2; + } /* Transfer rate [kbit/s], 5Mbit/s */ p[2] = 5000 >> 8; p[3] = 5000 & 0xff; @@ -555,21 +568,27 @@ static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p) /* Medium rotation rate [rpm], 5400 rpm */ p[28] = (5400 >> 8) & 0xff; p[29] = 5400 & 0xff; - return 0x1e; + return p[1] + 2; case 8: /* Caching page. */ p[0] = 8; p[1] = 0x12; + if (page_control == 1) { /* Changeable Values */ + return p[1] + 2; + } if (bdrv_enable_write_cache(s->bs)) { p[2] = 4; /* WCE */ } - return 20; + return p[1] + 2; 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; + if (page_control == 1) { /* Changeable Values */ + return p[1] + 2; + } p[2] = 3; // CD-R & CD-RW read p[3] = 0; // Writing not supported p[4] = 0x7f; /* Audio, composite, digital out, @@ -593,7 +612,7 @@ static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p) p[19] = (16 * 176) & 0xff; p[20] = (16 * 176) >> 8; // 16x write speed current p[21] = (16 * 176) & 0xff; - return 22; + return p[1] + 2; default: return 0; @@ -604,29 +623,46 @@ 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; + int page, dbd, buflen, page_control; uint8_t *p; + uint8_t dev_specific_param; dbd = req->cmd.buf[1] & 0x8; page = req->cmd.buf[2] & 0x3f; - DPRINTF("Mode Sense (page %d, len %zd)\n", page, req->cmd.xfer); + page_control = (req->cmd.buf[2] & 0xc0) >> 6; + DPRINTF("Mode Sense(%d) (page %d, len %d, page_control %d)\n", + (req->cmd.buf[0] == MODE_SENSE) ? 6 : 10, page, len, page_control); 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. */ + dev_specific_param = 0x80; /* Readonly. */ + } else { + dev_specific_param = 0x00; + } + + if (req->cmd.buf[0] == MODE_SENSE) { + p[1] = 0; /* Default media type. */ + p[2] = dev_specific_param; + p[3] = 0; /* Block descriptor length. */ + p += 4; + } else { /* MODE_SENSE_10 */ + p[2] = 0; /* Default media type. */ + p[3] = dev_specific_param; + p[6] = p[7] = 0; /* Block descriptor length. */ + p += 8; } - p += 4; bdrv_get_geometry(s->bs, &nb_sectors); - if ((~dbd) & nb_sectors) { - outbuf[3] = 8; /* Block descriptor length */ + if (!dbd && nb_sectors) { + if (req->cmd.buf[0] == MODE_SENSE) { + outbuf[3] = 8; /* Block descriptor length */ + } else { /* MODE_SENSE_10 */ + outbuf[7] = 8; /* Block descriptor length */ + } nb_sectors /= s->cluster_size; - nb_sectors--; if (nb_sectors > 0xffffff) - nb_sectors = 0xffffff; + nb_sectors = 0; p[0] = 0; /* media density code */ p[1] = (nb_sectors >> 16) & 0xff; p[2] = (nb_sectors >> 8) & 0xff; @@ -638,21 +674,37 @@ static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf) p += 8; } + if (page_control == 3) { /* Saved Values */ + return -1; /* ILLEGAL_REQUEST */ + } + switch (page) { case 0x04: case 0x05: case 0x08: case 0x2a: - p += mode_sense_page(req, page, p); + p += mode_sense_page(req, page, p, page_control); break; case 0x3f: - p += mode_sense_page(req, 0x08, p); - p += mode_sense_page(req, 0x2a, p); + p += mode_sense_page(req, 0x08, p, page_control); + p += mode_sense_page(req, 0x2a, p, page_control); break; + default: + return -1; /* ILLEGAL_REQUEST */ } buflen = p - outbuf; - outbuf[0] = buflen - 4; + /* + * The mode data length field specifies the length in bytes of the + * following data that is available to be transferred. The mode data + * length does not include itself. + */ + if (req->cmd.buf[0] == MODE_SENSE) { + outbuf[0] = buflen - 1; + } else { /* MODE_SENSE_10 */ + outbuf[0] = ((buflen - 2) >> 8) & 0xff; + outbuf[1] = (buflen - 2) & 0xff; + } if (buflen > req->cmd.xfer) buflen = req->cmd.xfer; return buflen; |