[Qemu-devel] [PATCH v2 11/33] scsi-disk: support DVD profile in GET CONFIGURATION

[Paolo Bonzini <pbonzini@redhat.com>]

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
        v1->v2: fix comment for outbuf[8]-outbuf[19]

 hw/scsi-disk.c |   50 ++++++++++++++++++++++++++++++++++++++++++--------
 1 files changed, 42 insertions(+), 8 deletions(-)

diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index 8f25e29..69af2e3 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -567,6 +567,19 @@ static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
     return buflen;
 }
 
+static inline bool media_is_dvd(SCSIDiskState *s)
+{
+    uint64_t nb_sectors;
+    if (s->qdev.type != TYPE_ROM) {
+        return false;
+    }
+    if (!bdrv_is_inserted(s->bs)) {
+        return false;
+    }
+    bdrv_get_geometry(s->bs, &nb_sectors);
+    return nb_sectors > CD_MAX_SECTORS;
+}
+
 static int scsi_read_dvd_structure(SCSIDiskState *s, SCSIDiskReq *r,
                                    uint8_t *outbuf)
 {
@@ -581,17 +594,38 @@ static int scsi_get_event_status_notification(SCSIDiskState *s,
     return -1;
 }
 
-static int scsi_get_configuration(SCSIDiskState *s, SCSIDiskReq *r,
-                                  uint8_t *outbuf)
+static int scsi_get_configuration(SCSIDiskState *s, uint8_t *outbuf)
 {
+    int current;
+
     if (s->qdev.type != TYPE_ROM) {
         return -1;
     }
-    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 */
-    return 8;
+    current = media_is_dvd(s) ? MMC_PROFILE_DVD_ROM : MMC_PROFILE_CD_ROM;
+    memset(outbuf, 0, 40);
+    stl_be_p(&outbuf[0], 36); /* Bytes after the data length field */
+    stw_be_p(&outbuf[6], current);
+    /* outbuf[8] - outbuf[19]: Feature 0 - Profile list */
+    outbuf[10] = 0x03; /* persistent, current */
+    outbuf[11] = 8; /* two profiles */
+    stw_be_p(&outbuf[12], MMC_PROFILE_DVD_ROM);
+    outbuf[14] = (current == MMC_PROFILE_DVD_ROM);
+    stw_be_p(&outbuf[16], MMC_PROFILE_CD_ROM);
+    outbuf[18] = (current == MMC_PROFILE_CD_ROM);
+    /* outbuf[20] - outbuf[31]: Feature 1 - Core feature */
+    stw_be_p(&outbuf[20], 1);
+    outbuf[22] = 0x08 | 0x03; /* version 2, persistent, current */
+    outbuf[23] = 8;
+    stl_be_p(&outbuf[24], 1); /* SCSI */
+    outbuf[28] = 1; /* DBE = 1, mandatory */
+    /* outbuf[32] - outbuf[39]: Feature 3 - Removable media feature */
+    stw_be_p(&outbuf[32], 3);
+    outbuf[34] = 0x08 | 0x03; /* version 2, persistent, current */
+    outbuf[35] = 4;
+    outbuf[36] = 0x39; /* tray, load=1, eject=1, unlocked at powerup, lock=1 */
+    /* TODO: Random readable, CD read, DVD read, drive serial number,
+       power management */
+    return 40;
 }
 
 static int scsi_emulate_mechanism_status(SCSIDiskState *s, uint8_t *outbuf)
@@ -1024,7 +1058,7 @@ static int scsi_disk_emulate_command(SCSIDiskReq *r)
         }
         break;
     case GET_CONFIGURATION:
-        buflen = scsi_get_configuration(s, r, outbuf);
+        buflen = scsi_get_configuration(s, outbuf);
         if (buflen < 0) {
             goto illegal_request;
         }
-- 
1.7.6