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From 6eb367e8ca2799f1ebfaeaa0fe69fe79c1aea884 Mon Sep 17 00:00:00 2001
From: Vladimir Serbinenko <phcoder@gmail.com>
Date: Tue, 6 Dec 2005 15:22:29 +0000
Subject: [PATCH] Support vscsi on IBM machines.

Support vscsi on IBM machines.
Tested by: Paulo Flabiano Smorigo.
Crucial information about API supplied by: Coleen <Last name unknown>.
Reviewed by: Coleen <Last name unknown>.
---
 ChangeLog                        |    8 ++++
 grub-core/disk/ieee1275/ofdisk.c |   91 ++++++++++++++++++++++++++++++--------
 2 files changed, 80 insertions(+), 19 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 4568bdb..6765e38 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2012-06-06  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/disk/ieee1275/ofdisk.c (scan): Support vscsi on IBM
+	machines.
+	Tested by: Paulo Flabiano Smorigo.
+	Crucial information about API supplied by: Coleen <Last name unknown>.
+	Reviewed by: Coleen <Last name unknown>.
+
 2012-06-05  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* util/grub-probe.c (escape_of_path): Don't add ieee1275/.
diff --git a/grub-core/disk/ieee1275/ofdisk.c b/grub-core/disk/ieee1275/ofdisk.c
index 6b734f7..eb3ff4f 100644
--- a/grub-core/disk/ieee1275/ofdisk.c
+++ b/grub-core/disk/ieee1275/ofdisk.c
@@ -115,33 +115,28 @@ ofdisk_hash_add (char *devpath, char *curcan)
 static void
 scan (void)
 {
-  auto int dev_iterate_real (struct grub_ieee1275_devalias *alias,
-			     int use_name);
+  auto int dev_iterate_real (const char *name, const char *path);
 
-  int dev_iterate_real (struct grub_ieee1275_devalias *alias, int use_name)
+  int dev_iterate_real (const char *name, const char *path)
     {
       struct ofdisk_hash_ent *op;
 
+      grub_dprintf ("disk", "disk name = %s, path = %s\n", name,
+		    path);
 
-      if (grub_strcmp (alias->type, "block") != 0)
-	return 0;
-
-      grub_dprintf ("disk", "disk name = %s, path = %s\n", alias->name,
-		    alias->path);
-
-      op = ofdisk_hash_find (alias->path);
+      op = ofdisk_hash_find (path);
       if (!op)
 	{
-	  char *name = grub_strdup (use_name ? alias->name : alias->path);
-	  char *can = grub_strdup (alias->path);
-	  if (!name || !can)
+	  char *name_dup = grub_strdup (name);
+	  char *can = grub_strdup (path);
+	  if (!name_dup || !can)
 	    {
 	      grub_errno = GRUB_ERR_NONE;
-	      grub_free (name);
+	      grub_free (name_dup);
 	      grub_free (can);
 	      return 0;
 	    }
-	  op = ofdisk_hash_add (name, can);
+	  op = ofdisk_hash_add (name_dup, can);
 	}
       return 0;
     }
@@ -149,18 +144,76 @@ scan (void)
   auto int dev_iterate_alias (struct grub_ieee1275_devalias *alias);
   int dev_iterate_alias (struct grub_ieee1275_devalias *alias)
   {
-    return dev_iterate_real (alias, 1);
+    if (grub_strcmp (alias->type, "block") != 0)
+      return 0;
+    return dev_iterate_real (alias->name, alias->path);
   }
 
   auto int dev_iterate (struct grub_ieee1275_devalias *alias);
   int dev_iterate (struct grub_ieee1275_devalias *alias)
   {
-    return dev_iterate_real (alias, 0);
+    if (grub_strcmp (alias->type, "vscsi") == 0)
+      {
+	static grub_ieee1275_ihandle_t ihandle;
+	struct set_color_args
+	{
+	  struct grub_ieee1275_common_hdr common;
+	  grub_ieee1275_cell_t method;
+	  grub_ieee1275_cell_t ihandle;
+	  grub_ieee1275_cell_t catch_result;
+	  grub_ieee1275_cell_t nentries;
+	  grub_ieee1275_cell_t table;
+	}
+	args;
+	char *buf, *bufptr;
+	unsigned i;
+
+	if (grub_ieee1275_open (alias->path, &ihandle))
+	  return 0;
+
+	INIT_IEEE1275_COMMON (&args.common, "call-method", 2, 3);
+	args.method = (grub_ieee1275_cell_t) "vscsi-report-luns";
+	args.ihandle = ihandle;
+	args.table = 0;
+	args.nentries = 0;
+
+	if (IEEE1275_CALL_ENTRY_FN (&args) == -1)
+	  {
+	    grub_ieee1275_close (ihandle);
+	    return 0;
+	  }
+
+	buf = grub_malloc (grub_strlen (alias->path) + 32);
+	if (!buf)
+	  return 0;
+	bufptr = grub_stpcpy (buf, alias->path);
+
+	for (i = 0; i < args.nentries; i++)
+	  {
+	    grub_uint64_t *ptr;
+
+	    ptr = *(grub_uint64_t **) (args.table + 4 + 8 * i);
+	    while (*ptr)
+	      {
+		grub_snprintf (bufptr, 32, "/disk@%" PRIxGRUB_UINT64_T, *ptr++);
+		if (dev_iterate_real (buf, buf))
+		  return 1;
+	      }
+	  }
+	grub_ieee1275_close (ihandle);
+	grub_free (buf);
+	return 0;
+      }
+
+    if (!grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_NO_TREE_SCANNING_FOR_DISKS)
+	&& grub_strcmp (alias->type, "block") == 0)
+      return dev_iterate_real (alias->path, alias->path);
+
+    return grub_children_iterate (alias->path, dev_iterate);
   }
 
   grub_devalias_iterate (dev_iterate_alias);
-  if (!grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_NO_TREE_SCANNING_FOR_DISKS))
-    grub_ieee1275_devices_iterate (dev_iterate);
+  grub_children_iterate ("/", dev_iterate);
 }
 
 static int
-- 
1.7.10.2