[fcoe] Add support for Fibre Channel over Ethernet

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/include/ipxe/errfile.h

@@ -187,6 +187,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
 #define ERRFILE_fc			( ERRFILE_NET | 0x002b0000 )
 #define ERRFILE_fcels			( ERRFILE_NET | 0x002c0000 )
 #define ERRFILE_fcp			( ERRFILE_NET | 0x002d0000 )
+#define ERRFILE_fcoe			( ERRFILE_NET | 0x002e0000 )
 
 #define ERRFILE_image		      ( ERRFILE_IMAGE | 0x00000000 )
 #define ERRFILE_elf		      ( ERRFILE_IMAGE | 0x00010000 )

src/include/ipxe/fcoe.h

@@ -0,0 +1,76 @@
+#ifndef _IPXE_FCOE_H
+#define _IPXE_FCOE_H
+
+/**
+ * @file
+ *
+ * Fibre Channel over Ethernet
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdint.h>
+#include <ipxe/fc.h>
+#include <ipxe/if_ether.h>
+
+/** An FCoE name */
+union fcoe_name {
+	/** Fibre Channel name */
+	struct fc_name fc;
+	/** FCoE name */
+	struct {
+		/** Naming authority */
+		uint16_t authority;
+		/** MAC address */
+		uint8_t mac[ETH_ALEN];
+	} __attribute__ (( packed )) fcoe;
+};
+
+/** IEEE 48-bit address */
+#define FCOE_AUTHORITY_IEEE 0x1000
+
+/** IEEE extended */
+#define FCOE_AUTHORITY_IEEE_EXTENDED 0x2000
+
+/** An FCoE header */
+struct fcoe_header {
+	/** FCoE frame version */
+	uint8_t version;
+	/** Reserved */
+	uint8_t reserved[12];
+	/** Start of Frame marker */
+	uint8_t sof;
+} __attribute__ (( packed ));
+
+/** FCoE frame version */
+#define FCOE_FRAME_VER 0x00
+
+/** Start of Frame marker values */
+enum fcoe_sof {
+	FCOE_SOF_F = 0x28,	/**< Start of Frame Class F */
+	FCOE_SOF_I2 = 0x2d,	/**< Start of Frame Initiate Class 2 */
+	FCOE_SOF_N2 = 0x35,	/**< Start of Frame Normal Class 2 */
+	FCOE_SOF_I3 = 0x2e,	/**< Start of Frame Initiate Class 3 */
+	FCOE_SOF_N3 = 0x36,	/**< Start of Frame Normal Class 3 */
+};
+
+/** An FCoE footer */
+struct fcoe_footer {
+	/** CRC */
+	uint32_t crc;
+	/** End of frame marker */
+	uint8_t eof;
+	/** Reserved */
+	uint8_t reserved[3];
+} __attribute__ (( packed ));
+
+/** End of Frame marker value */
+enum fcoe_eof {
+	FCOE_EOF_N = 0x41,	/**< End of Frame Normal */
+	FCOE_EOF_T = 0x42,	/**< End of Frame Terminate */
+	FCOE_EOF_NI = 0x49,	/**< End of Frame Invalid */
+	FCOE_EOF_A = 0x50,	/**< End of Frame Abort */
+};
+
+#endif /* _IPXE_FCOE_H */

src/include/ipxe/features.h

@@ -50,6 +50,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
 #define DHCP_EB_FEATURE_ELF		0x22 /**< ELF format */
 #define DHCP_EB_FEATURE_COMBOOT		0x23 /**< COMBOOT format */
 #define DHCP_EB_FEATURE_EFI		0x24 /**< EFI format */
+#define DHCP_EB_FEATURE_FCOE		0x25 /**< FCoE protocol */
 
 /** @} */
 

src/include/ipxe/if_ether.h

@@ -22,6 +22,8 @@ FILE_LICENCE ( GPL2_OR_LATER );
 #define ETH_P_SLOW	0x8809	/* Ethernet slow protocols */
 #define ETH_P_EAPOL	0x888E	/* 802.1X EAP over LANs */
 #define ETH_P_AOE	0x88A2	/* ATA over Ethernet */
+#define ETH_P_FCOE	0x8906	/* Fibre Channel over Ethernet */
+#define ETH_P_FIP	0x8914	/* FCoE Initialization Protocol */
 
 /** An Ethernet link-layer header */
 struct ethhdr {