Adding AoE support to nza-kernel

@@ -19,10 +19,11 @@
  * CDDL HEADER END
  */
 /*
  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
+ * Copyright 2012 Nexenta Systems, Inc.  All rights reserved.
  */
 
 /*
  * This file contains ddi functions needed during boot and DR.
  * Many functions in swapgeneric.c can be moved here.

@@ -73,10 +74,12 @@
 #if defined(__x86)
 char *bootpath_prop = NULL;
 char *fstype_prop = NULL;
 #endif
 
+char *aoepath_prop = NULL;
+
 /*
  * Setup the DDI but don't necessarily init the DDI.  This will happen
  * later once /boot is released.
  */
 void

@@ -188,10 +191,44 @@
          * of size SYS_NMLN, which is far bigger than will actually ever
          * be needed).
          */
         (void) BOP_GETPROP(bootops, "impl-arch-name", platform);
 
+        /*
+         * If boot-aoepath is defined, assume it's AoE boot and set bootpath to
+         * aoeblk/blkdev device corresponding to specified shelf.slot numbers.
+         */
+        size = (size_t)BOP_GETPROPLEN(bootops, "boot-aoepath");
+        if (size != -1) {
+                char    aoedev[MAXPATHLEN];
+                char    *delim;
+                int     shelf, slot;
+
+                aoepath_prop = kmem_zalloc(size, KM_SLEEP);
+                (void) BOP_GETPROP(bootops, "boot-aoepath", aoepath_prop);
+                /*
+                 * If boot-aoepath is set to "auto", device will be
+                 * configured later during AoE autoconfiguration.
+                 */
+                if (strcmp(aoepath_prop, "auto") != 0) {
+                        if ((delim = strchr(aoepath_prop, '.')) != NULL)
+                                *delim++ = '\0';
+                        if (ddi_strtol(aoepath_prop, (char **)NULL, 10,
+                            (long *)&shelf) != 0)
+                                shelf = 0;
+                        if (delim == NULL ||
+                            ddi_strtol(delim, (char **)NULL, 10,
+                            (long *)&slot) != 0)
+                                slot = 0;
+                        /* FIXME aoeblk@0,0 ?! */
+                        (void) snprintf(aoedev, MAXPATHLEN,
+                            "/aoe/aoeblk@0,0/blkdev@%d,%d",
+                            shelf, slot);
+                        setbootpath(aoedev);
+                }
+        }
+
 #if defined(__x86)
         /*
          * Retrieve and honor the bootpath and optional fstype properties
          */
         size = (size_t)BOP_GETPROPLEN(bootops, "bootpath");