PSARC/2008/687 T11 Storage Management HBA API(SM-HBA)

6795795 Provide management utility for SAS Gen-2(SAS-2 compliant) HBAs.
6795797 Provide SM-HBA wrapper library for SAS Gen-2(SAS-2 compliant) HBAs.
6795800 Provide SM-HBA Vendor Specific Library for Sun SAS-2 HBAs.

1 files changed, 102 insertions, 0 deletions

diff --git a/usr/src/lib/sun_sas/common/Sun_sasLoadLibrary.c b/usr/src/lib/sun_sas/common/Sun_sasLoadLibrary.c
new file mode 100644
index 0000000000..b5df2a4cc8
--- /dev/null
+++ b/usr/src/lib/sun_sas/common/Sun_sasLoadLibrary.c
@@ -0,0 +1,102 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+
+#include <sun_sas.h>
+
+/*
+ * Loads the HBA Library.  Must be called before calling any HBA library
+ * functions
+ *
+ * Return values:
+ *	HBA_STATUS_OK	    library properly loaded
+ *	HBA_STATUS_ERROR    library loaded incorrectly
+ */
+int	loadCount = 0;
+HBA_STATUS Sun_sasLoadLibrary() {
+	const char	ROUTINE[] = "Sun_sasLoadLibrary";
+	di_node_t	root;
+	boolean_t	atLeastOneHBA = B_FALSE;
+	boolean_t	atLeastOneFailure = B_FALSE;
+	hrtime_t	    start = 0;
+	hrtime_t	    end = 0;
+	double		    duration = 0;
+
+	/* Make sure that library has not been already loaded */
+	if (loadCount++ > 0) {
+		log(LOG_DEBUG, ROUTINE, "Library already loaded %d time."
+		    " Ignoring.", loadCount);
+		return (HBA_STATUS_ERROR);
+	}
+	hba_count = 0;
+	open_handle_index = 1;
+	/* Initialize the read-write lock */
+	if (mutex_init(&all_hbas_lock, USYNC_THREAD, NULL)) {
+	    log(LOG_DEBUG, ROUTINE,
+		"Unable to initialize lock in LoadLibrary for reason \"%s\"",
+		strerror(errno));
+	    return (HBA_STATUS_ERROR);
+	}
+	/* grab write lock */
+	lock(&all_hbas_lock);
+
+	start = gethrtime();
+	if ((root = di_init("/", DINFOCACHE)) == DI_NODE_NIL) {
+	    log(LOG_DEBUG, ROUTINE,
+		"Unable to load device tree for reason \"%s\"",
+		strerror(errno));
+	    unlock(&all_hbas_lock);
+	    return (HBA_STATUS_ERROR);
+	}
+	end = gethrtime();
+	duration = end - start;
+	duration /= HR_SECOND;
+	log(LOG_DEBUG, ROUTINE, "Loading device tree init took "
+	    "%.6f seconds", duration);
+
+	/* At load time, we only gather libdevinfo information */
+	if (devtree_get_all_hbas(root) == HBA_STATUS_OK) {
+	    atLeastOneHBA = B_TRUE;
+	} else {
+	    atLeastOneFailure = B_TRUE;
+	}
+
+	di_fini(root);
+
+	unlock(&all_hbas_lock);
+
+	/* Now determine what status code to return */
+	if (atLeastOneHBA) {
+	    /* We've got at least one HBA and possibly some failures */
+	    return (HBA_STATUS_OK);
+	} else if (atLeastOneFailure) {
+	    /* We have no HBAs but have failures */
+	    return (HBA_STATUS_ERROR);
+	} else {
+	    /* We have no HBAs and no failures */
+	    return (HBA_STATUS_OK);
+	}
+}