Adding AoE support to nza-kernel

*** 19,28 ****
--- 19,29 ----
   * 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.
*** 73,82 ****
--- 74,85 ----
  #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
*** 188,197 ****
--- 191,234 ----
           * 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");