softraid support for ata over ethernet (aoe). this includes a client and

part of a server.  there's no configuration yet, and several other drawbacks,
but it can be hammered into shape.  i haven't moved the code forward in a year,
and marco wants it in the tree to hack on.

1 files changed, 112 insertions, 0 deletions

diff --git a/sys/net/if_aoe.h b/sys/net/if_aoe.h
new file mode 100644
index 00000000000..79e0fe0eb52
--- /dev/null
+++ b/sys/net/if_aoe.h
@@ -0,0 +1,112 @@
+/* $OpenBSD: if_aoe.h,v 1.1 2008/11/23 23:44:01 tedu Exp $ */
+/*
+ * Copyright (c) 2007 Ted Unangst <tedu@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#include <sys/workq.h>
+
+struct aoe_packet {
+#define	AOE_F_ERROR	(1 << 2)
+#define AOE_F_RESP	(1 << 3)
+#if BYTE_ORDER == LITTLE_ENDIAN
+	unsigned char flags : 4;
+	unsigned char vers : 4;
+#else
+	unsigned char vers : 4;
+	unsigned char flags : 4;
+#endif
+	unsigned char error;
+	unsigned short major;
+	unsigned char minor;
+	unsigned char command;
+	unsigned int tag;
+	union {
+		/* command packet */
+		struct {
+#define			AOE_AF_WRITE	(1 << 0)
+#define			AOE_AF_EXTENDED	(1 << 6)
+			unsigned char aflags;
+			unsigned char feature;
+			unsigned char sectorcnt;
+#define			AOE_READ	0x20
+#define 		AOE_READ_EXT	0x24
+#define 		AOE_WRITE	0x30
+#define 		AOE_WRITE_EXT	0x34
+			unsigned char cmd;
+			unsigned char lba0;
+			unsigned char lba1;
+			unsigned char lba2;
+#define			AOE_LBABIT	0x40
+			unsigned char lba3;
+			unsigned char lba4;
+			unsigned char lba5;
+			unsigned short reserved;
+			unsigned char data[];
+		} __packed;
+		/* config packet */
+		struct {
+			unsigned short buffercnt;
+			unsigned short firmwarevers;
+			unsigned char configsectorcnt;
+#if BYTE_ORDER == LITTLE_ENDIAN
+			unsigned char ccmd : 4;
+			unsigned char serververs : 4;
+#else
+			unsigned char serververs : 4;
+			unsigned char ccmd : 4;
+#endif
+			unsigned short configstringlen;
+			unsigned char configstring[1024];
+		} __packed;
+	};
+} __packed;
+
+#define AOE_BLK2HDR(blk, ap) do { \
+	ap->lba0 = blk; \
+        ap->lba1 = blk >> 8; \
+	ap->lba2 = blk >> 16; \
+} while (0)
+
+#define AOE_HDR2BLK(ap, blk) do { \
+	blk = 0; \
+	blk |= ap->lba0; \
+	blk |= ap->lba1 << 8; \
+	blk |= ap->lba2 << 16; \
+} while (0)
+
+
+#define AOE_CFGHDRLEN 32
+#define AOE_CMDHDRLEN 36
+
+struct aoe_req {
+	void *v;
+	int tag;
+	int len;
+	TAILQ_ENTRY(aoe_req) next;
+	struct timeout to;
+};
+
+struct aoe_handler {
+	TAILQ_ENTRY(aoe_handler) next;
+        unsigned short major;
+	unsigned char minor;
+	struct ifnet *ifp;
+	workq_fn fn;
+	TAILQ_HEAD(, aoe_req) reqs;
+};
+
+extern TAILQ_HEAD(aoe_handler_head, aoe_handler) aoe_handlers;
+extern int aoe_waiting;
+
+void aoe_input(struct ifnet *, struct mbuf *);