From: Jack Lange <jacklange@cs.pitt.edu>
Date: Thu, 8 Sep 2011 17:38:08 +0000 (-0400)
Subject: added mechanism status ATAPI command
X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=commitdiff_plain;h=36927aa4fd7f2aa4095de22589ec0a5210f91e99

added mechanism status ATAPI command
---

diff --git a/palacios/src/devices/atapi-types.h b/palacios/src/devices/atapi-types.h
index 300e618..3fd752d 100644
--- a/palacios/src/devices/atapi-types.h
+++ b/palacios/src/devices/atapi-types.h
@@ -188,6 +188,34 @@ struct atapi_rd_toc_resp {
 } __attribute__((packed));
 
 
+struct atapi_mech_status_cmd {
+    uint8_t atapi_cmd;   // 0xbd
+    uint8_t rsvd1        : 5;
+    uint8_t lun          : 3;
+    uint8_t rsvd2[6];
+    uint16_t alloc_len;
+    uint8_t rsvd3;
+    uint8_t link             : 1;
+    uint8_t flag             : 1;
+    uint8_t naca             : 1;
+    uint8_t rsvd5            : 3;
+    uint8_t vendor_specific  : 2;
+} __attribute__((packed));
+
+struct atapi_mech_status_resp {
+    uint8_t cur_slot          : 5;
+    uint8_t changer_state     : 2;
+    uint8_t fault             : 1;
+    uint8_t rsvd1             : 4;
+    uint8_t door_open         : 1;
+    uint8_t cd_dvd_mech_state : 3;
+    uint32_t lba;
+    uint8_t num_slots         : 6;
+    uint8_t rsvd2             : 2;
+    uint16_t slot_table_len;
+} __attribute__((packed));
+
+
 struct atapi_inquiry_cmd {
     uint8_t atapi_cmd;  // 0x12
     uint8_t evpd           : 1; 
diff --git a/palacios/src/devices/atapi.h b/palacios/src/devices/atapi.h
index f32ed8d..0892f8c 100644
--- a/palacios/src/devices/atapi.h
+++ b/palacios/src/devices/atapi.h
@@ -460,6 +460,7 @@ static int atapi_mode_sense(struct ide_internal * ide, struct ide_channel * chan
 }
 
 
+
 static int atapi_inquiry(struct ide_internal * ide, struct ide_channel * channel) {
     struct ide_drive * drive = get_selected_drive(channel);
     struct atapi_inquiry_cmd * inquiry_cmd = (struct atapi_inquiry_cmd *)(drive->data_buf);
@@ -492,6 +493,28 @@ static int atapi_inquiry(struct ide_internal * ide, struct ide_channel * channel
 }
 
 
+static int atapi_mech_status(struct ide_internal * ide, struct ide_channel * channel) {
+    struct ide_drive * drive = get_selected_drive(channel);
+    struct atapi_mech_status_cmd * status_cmd = (struct atapi_mech_status_cmd *)(drive->data_buf);
+    uint16_t alloc_len = be_to_le_16(status_cmd->alloc_len);
+    struct atapi_mech_status_resp * resp = (struct atapi_mech_status_resp *)(drive->data_buf);
+    int xfer_len = sizeof(struct atapi_mech_status_resp);
+
+    memset(resp, 0, sizeof(struct atapi_mech_status_resp));
+
+    resp->lba = le_to_be_32(1);
+    resp->slot_table_len = le_to_be_16(0);
+    
+    if (alloc_len < xfer_len) {
+	xfer_len = alloc_len;
+    }
+
+    atapi_setup_cmd_resp(ide, channel, xfer_len);
+
+    return 0;
+}
+
+
 static int atapi_cmd_is_data_op(uint8_t cmd) {
     switch (cmd) {
 	case 0x28: // read (10)
@@ -583,11 +606,18 @@ static int atapi_handle_packet(struct guest_info * core, struct ide_internal * i
 	   }
 	   break;
 
+       case 0xbd: // mechanism status 
+	   if (atapi_mech_status(ide, channel) == -1) {
+	       PrintError("IDE: error in ATAPI Mechanism status query (%x)\n", cmd);
+	       return -1;
+	   }
+	   break;
+
+
        case 0xa8: // read(12)
 
 
        case 0x1b: // start/stop drive
-       case 0xbd: // mechanism status 
 
        case 0xbe: // read cd