First draft of iSCSI protocol support. Is capable of retrieving disk

blocks.

src/include/gpxe/scsi.h

@@ -0,0 +1,34 @@
+#ifndef _SCSI_H
+#define _SCSI_H
+
+#include <stdint.h>
+
+struct scsi_cdb_read_10 {
+	/** Opcode */
+	uint8_t opcode;
+	/** Flags */
+	uint8_t flags;
+	/** Start address
+	 *
+	 * This is a logical block number, in big-endian order.
+	 */
+	uint32_t lba;
+	/** Group number */
+	uint8_t group;
+	/** Transfer length
+	 *
+	 * This is a logical block count.
+	 */
+	uint16_t len;
+	/** Control byte */
+	uint8_t control;
+} __attribute__ (( packed ));
+
+#define SCSI_OPCODE_READ_10 0x28
+
+union scsi_cdb {
+	struct scsi_cdb_read_10 read_10;
+	char bytes[16];
+};
+
+#endif /* _SCSI_H */