3 files changed, 62 insertions, 4 deletions

diff --git a/include/asm-ia64/sn/bte.h b/include/asm-ia64/sn/bte.h
index 5335d87ca5f8..a0d214f43115 100644
--- a/include/asm-ia64/sn/bte.h
+++ b/include/asm-ia64/sn/bte.h
@@ -3,7 +3,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (c) 2000-2006 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2000-2007 Silicon Graphics, Inc.  All Rights Reserved.
  */
 
 
@@ -150,6 +150,35 @@ typedef enum {
 	BTEFAIL_NOTAVAIL,	/* BTE not available */
 } bte_result_t;
 
+#define BTEFAIL_SH2_RESP_SHORT	0x1	/* bit 000001 */
+#define BTEFAIL_SH2_RESP_LONG	0x2	/* bit 000010 */
+#define BTEFAIL_SH2_RESP_DSP	0x4	/* bit 000100 */
+#define BTEFAIL_SH2_RESP_ACCESS	0x8	/* bit 001000 */
+#define BTEFAIL_SH2_CRB_TO	0x10	/* bit 010000 */
+#define BTEFAIL_SH2_NACK_LIMIT	0x20	/* bit 100000 */
+#define BTEFAIL_SH2_ALL		0x3F	/* bit 111111 */
+
+#define	BTE_ERR_BITS	0x3FUL
+#define	BTE_ERR_SHIFT	36
+#define BTE_ERR_MASK	(BTE_ERR_BITS << BTE_ERR_SHIFT)
+
+#define BTE_ERROR_RETRY(value)						\
+	(is_shub2() ? (value != BTEFAIL_SH2_CRB_TO)			\
+		: (value != BTEFAIL_TOUT))
+
+/*
+ * On shub1 BTE_ERR_MASK will always be false, so no need for is_shub2()
+ */
+#define BTE_SHUB2_ERROR(_status)					\
+	((_status & BTE_ERR_MASK) 					\
+	   ? (((_status >> BTE_ERR_SHIFT) & BTE_ERR_BITS) | IBLS_ERROR) \
+	   : _status)
+
+#define BTE_GET_ERROR_STATUS(_status)					\
+	(BTE_SHUB2_ERROR(_status) & ~IBLS_ERROR)
+
+#define BTE_VALID_SH2_ERROR(value)					\
+	((value >= BTEFAIL_SH2_RESP_SHORT) && (value <= BTEFAIL_SH2_ALL))
 
 /*
  * Structure defining a bte.  An instance of this
diff --git a/include/asm-ia64/sn/xp.h b/include/asm-ia64/sn/xp.h
index 6f807e0193b7..f7711b308e48 100644
--- a/include/asm-ia64/sn/xp.h
+++ b/include/asm-ia64/sn/xp.h
@@ -86,7 +86,7 @@ xp_bte_copy(u64 src, u64 vdst, u64 len, u64 mode, void *notification)
 	BUG_ON(REGION_NUMBER(vdst) != RGN_KERNEL);
 
 	ret = bte_copy(src, pdst, len, mode, notification);
-	if (ret != BTE_SUCCESS) {
+	if ((ret != BTE_SUCCESS) && BTE_ERROR_RETRY(ret)) {
 		if (!in_interrupt()) {
 			cond_resched();
 		}
@@ -244,7 +244,30 @@ enum xpc_retval {
 
 	xpcDisconnected,	/* 51: channel disconnected (closed) */
 
-	xpcUnknownReason	/* 52: unknown reason -- must be last in list */
+	xpcBteSh2Start,		/* 52: BTE CRB timeout */
+
+				/* 53: 0x1 BTE Error Response Short */
+	xpcBteSh2RspShort = xpcBteSh2Start + BTEFAIL_SH2_RESP_SHORT,
+
+				/* 54: 0x2 BTE Error Response Long */
+	xpcBteSh2RspLong = xpcBteSh2Start + BTEFAIL_SH2_RESP_LONG,
+
+				/* 56: 0x4 BTE Error Response DSB */
+	xpcBteSh2RspDSB = xpcBteSh2Start + BTEFAIL_SH2_RESP_DSP,
+
+				/* 60: 0x8 BTE Error Response Access */
+	xpcBteSh2RspAccess = xpcBteSh2Start + BTEFAIL_SH2_RESP_ACCESS,
+
+				/* 68: 0x10 BTE Error CRB timeout */
+	xpcBteSh2CRBTO = xpcBteSh2Start + BTEFAIL_SH2_CRB_TO,
+
+				/* 84: 0x20 BTE Error NACK limit */
+	xpcBteSh2NACKLimit = xpcBteSh2Start + BTEFAIL_SH2_NACK_LIMIT,
+
+				/* 115: BTE end */
+	xpcBteSh2End = xpcBteSh2Start + BTEFAIL_SH2_ALL,
+
+	xpcUnknownReason	/* 116: unknown reason -- must be last in list */
 };
 
 
diff --git a/include/asm-ia64/sn/xpc.h b/include/asm-ia64/sn/xpc.h
index e52b8508083b..8e5d7de9c632 100644
--- a/include/asm-ia64/sn/xpc.h
+++ b/include/asm-ia64/sn/xpc.h
@@ -3,7 +3,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (c) 2004-2006 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2004-2007 Silicon Graphics, Inc.  All Rights Reserved.
  */
 
 
@@ -1211,6 +1211,12 @@ xpc_IPI_init(int index)
 static inline enum xpc_retval
 xpc_map_bte_errors(bte_result_t error)
 {
+	if (is_shub2()) {
+		if (BTE_VALID_SH2_ERROR(error))
+			return xpcBteSh2Start + error;
+		else
+			return xpcBteUnmappedError;
+	}
 	switch (error) {
 	case BTE_SUCCESS:	return xpcSuccess;
 	case BTEFAIL_DIR:	return xpcBteDirectoryError;