X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=include%2Fasm-ia64%2Fsn%2Fxp.h;h=6f807e0193b77600f7a3abd03125fdb9cebc2b13;hb=03feb0524660bcd890674d11d29a1873ca14d13c;hp=49faf8f26430806f6fa19fc39a6d8b65f914fe04;hpb=b0c4e148bd591629749d02a8fbc8d81c26d548cf;p=powerpc.git

diff --git a/include/asm-ia64/sn/xp.h b/include/asm-ia64/sn/xp.h
index 49faf8f264..6f807e0193 100644
--- a/include/asm-ia64/sn/xp.h
+++ b/include/asm-ia64/sn/xp.h
@@ -18,6 +18,7 @@
 
 #include <linux/cache.h>
 #include <linux/hardirq.h>
+#include <linux/mutex.h>
 #include <asm/sn/types.h>
 #include <asm/sn/bte.h>
 
@@ -59,23 +60,37 @@
  * the bte_copy() once in the hope that the failure was due to a temporary
  * aberration (i.e., the link going down temporarily).
  *
- * See bte_copy for definition of the input parameters.
+ * 	src - physical address of the source of the transfer.
+ *	vdst - virtual address of the destination of the transfer.
+ *	len - number of bytes to transfer from source to destination.
+ *	mode - see bte_copy() for definition.
+ *	notification - see bte_copy() for definition.
  *
  * Note: xp_bte_copy() should never be called while holding a spinlock.
  */
 static inline bte_result_t
-xp_bte_copy(u64 src, u64 dest, u64 len, u64 mode, void *notification)
+xp_bte_copy(u64 src, u64 vdst, u64 len, u64 mode, void *notification)
 {
 	bte_result_t ret;
+	u64 pdst = ia64_tpa(vdst);
 
 
-	ret = bte_copy(src, dest, len, mode, notification);
+	/*
+	 * Ensure that the physically mapped memory is contiguous.
+	 *
+	 * We do this by ensuring that the memory is from region 7 only.
+	 * If the need should arise to use memory from one of the other
+	 * regions, then modify the BUG_ON() statement to ensure that the
+	 * memory from that region is always physically contiguous.
+	 */
+	BUG_ON(REGION_NUMBER(vdst) != RGN_KERNEL);
 
+	ret = bte_copy(src, pdst, len, mode, notification);
 	if (ret != BTE_SUCCESS) {
 		if (!in_interrupt()) {
 			cond_resched();
 		}
-		ret = bte_copy(src, dest, len, mode, notification);
+		ret = bte_copy(src, pdst, len, mode, notification);
 	}
 
 	return ret;
@@ -227,7 +242,9 @@ enum xpc_retval {
 
 	xpcOpenCloseError,	/* 50: channel open/close protocol error */
 
-	xpcUnknownReason	/* 51: unknown reason -- must be last in list */
+	xpcDisconnected,	/* 51: channel disconnected (closed) */
+
+	xpcUnknownReason	/* 52: unknown reason -- must be last in list */
 };
 
 
@@ -357,7 +374,7 @@ typedef void (*xpc_notify_func)(enum xpc_retval reason, partid_t partid,
  * the channel.
  */
 struct xpc_registration {
-	struct semaphore sema;
+	struct mutex mutex;
 	xpc_channel_func func;		/* function to call */
 	void *key;			/* pointer to user's key */
 	u16 nentries;			/* #of msg entries in local msg queue */