Implemented support for hardware cache flush. This is based on code I originally

did for yellowTAB GmbH when I worked for then and is being used under permission.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19840 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/drivers/bus/scsi/scsi_cmds.h

@@ -1023,4 +1023,21 @@ enum {
 												// and Mechanism status page
 } scsi_read_cd_sub_channel_selection;
 
+// SYNCHRONIZE CACHE (10)
+
+typedef struct scsi_cmd_sync_cache {
+	uint8 opcode;
+	LBITFIELD8_4(
+		RelAddr : 1,
+		immed : 1,		// 1 - return immediately, 0 - return on completion
+		res1_1 : 3,
+		LUN : 3
+	);
+	scsi_cd_lba lba;
+	uint8 res2;	
+	uint8 nblocks_high;
+	uint8 nblocks_low;
+	uint8 control;
+} scsi_cmd_sync_cache;
+
 #endif

headers/os/drivers/bus/scsi/scsi_periph.h

@@ -154,7 +154,9 @@ typedef struct scsi_periph_interface {
 		
 	// fill data with icon (for B_GET_ICON ioctl)
 	status_t (*get_icon)( icon_type type, device_icon *data );
-	
+
+	// synchronizes (flush) the device cache
+	err_res(*synchronize_cache)(scsi_periph_device device, scsi_ccb *request);		
 } scsi_periph_interface;
 
 #define SCSI_PERIPH_MODULE_NAME "generic/scsi_periph/v1"