From 2274f0f3de80c1f36668815ce3f79f73716eda73 Mon Sep 17 00:00:00 2001

From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>

Date: Tue, 19 Feb 2013 09:10:26 +0100

Subject: [PATCH 154/482] 	Support Openfirmware disks with non-512B

 sectors.

	* grub-core/disk/ieee1275/ofdisk.c (grub_ofdisk_open): Get the block

	size of the disk.

	* (grub_ofdisk_get_block_size): New function.

	* (grub_ofdisk_prepare): Use the correct block size.

	* (grub_ofdisk_read): Likewise.

	* (grub_ofdisk_write): Likewise.

	* include/grub/ieee1275/ofdisk.h (grub_ofdisk_get_block_size):

	New proto.

---

 ChangeLog                        | 13 +++++++++

 grub-core/disk/ieee1275/ofdisk.c | 59 ++++++++++++++++++++++++++++++++++++----

 include/grub/ieee1275/ofdisk.h   |  3 ++

 3 files changed, 70 insertions(+), 5 deletions(-)

diff --git a/ChangeLog b/ChangeLog

index 3731229..654ebcb 100644

--- a/ChangeLog

+++ b/ChangeLog

@@ -1,3 +1,16 @@

+2013-02-19  Paulo Flabiano Smorigo <pfsmorigo@br.ibm.com>

+

+	Support Openfirmware disks with non-512B sectors.

+

+	* grub-core/disk/ieee1275/ofdisk.c (grub_ofdisk_open): Get the block

+	size of the disk.

+	* (grub_ofdisk_get_block_size): New function.

+	* (grub_ofdisk_prepare): Use the correct block size.

+	* (grub_ofdisk_read): Likewise.

+	* (grub_ofdisk_write): Likewise.

+	* include/grub/ieee1275/ofdisk.h (grub_ofdisk_get_block_size):

+	New proto.

+

 2013-02-06  Vladimir Serbinenko  <phcoder@gmail.com>

 	* grub-core/commands/lsacpi.c: Fix types on 64-bit platform.

diff --git a/grub-core/disk/ieee1275/ofdisk.c b/grub-core/disk/ieee1275/ofdisk.c

index 644bbd2..2130cb1 100644

--- a/grub-core/disk/ieee1275/ofdisk.c

+++ b/grub-core/disk/ieee1275/ofdisk.c

@@ -349,6 +349,14 @@ grub_ofdisk_open (const char *name, grub_disk_t disk)

       return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "not a block device");

     }

+  grub_uint32_t block_size = 0;

+  if (grub_ofdisk_get_block_size (devpath, &block_size) == 0)

+    {

+      for (disk->log_sector_size = 0;

+           (1U << disk->log_sector_size) < block_size;

+           disk->log_sector_size++);

+    }

+

   /* XXX: There is no property to read the number of blocks.  There

      should be a property `#blocks', but it is not there.  Perhaps it

      is possible to use seek for this.  */

@@ -415,7 +423,7 @@ grub_ofdisk_prepare (grub_disk_t disk, grub_disk_addr_t sector)

       last_devpath = disk->data;      

     }

-  pos = sector << GRUB_DISK_SECTOR_BITS;

+  pos = sector << disk->log_sector_size;

   grub_ieee1275_seek (last_ihandle, pos, &status);

   if (status < 0)

@@ -434,9 +442,9 @@ grub_ofdisk_read (grub_disk_t disk, grub_disk_addr_t sector,

   err = grub_ofdisk_prepare (disk, sector);

   if (err)

     return err;

-  grub_ieee1275_read (last_ihandle, buf, size  << GRUB_DISK_SECTOR_BITS,

+  grub_ieee1275_read (last_ihandle, buf, size  << disk->log_sector_size,

 		      &actual);

-  if (actual != (grub_ssize_t) (size  << GRUB_DISK_SECTOR_BITS))

+  if (actual != (grub_ssize_t) (size  << disk->log_sector_size))

     return grub_error (GRUB_ERR_READ_ERROR, N_("failure reading sector 0x%llx "

 					       "from `%s'"),

 		       (unsigned long long) sector,

@@ -454,9 +462,9 @@ grub_ofdisk_write (grub_disk_t disk, grub_disk_addr_t sector,

   err = grub_ofdisk_prepare (disk, sector);

   if (err)

     return err;

-  grub_ieee1275_write (last_ihandle, buf, size  << GRUB_DISK_SECTOR_BITS,

+  grub_ieee1275_write (last_ihandle, buf, size  << disk->log_sector_size,

 		       &actual);

-  if (actual != (grub_ssize_t) (size << GRUB_DISK_SECTOR_BITS))

+  if (actual != (grub_ssize_t) (size << disk->log_sector_size))

     return grub_error (GRUB_ERR_WRITE_ERROR, N_("failure writing sector 0x%llx "

 						"to `%s'"),

 		       (unsigned long long) sector,

@@ -493,3 +501,44 @@ grub_ofdisk_fini (void)

   grub_disk_dev_unregister (&grub_ofdisk_dev);

 }

+

+grub_err_t

+grub_ofdisk_get_block_size (const char *device, grub_uint32_t *block_size)

+{

+  struct size_args_ieee1275

+    {

+      struct grub_ieee1275_common_hdr common;

+      grub_ieee1275_cell_t method;

+      grub_ieee1275_cell_t ihandle;

+      grub_ieee1275_cell_t result;

+      grub_ieee1275_cell_t size1;

+      grub_ieee1275_cell_t size2;

+    } args_ieee1275;

+

+  if (last_ihandle)

+    grub_ieee1275_close (last_ihandle);

+

+  last_ihandle = 0;

+  last_devpath = NULL;

+

+  grub_ieee1275_open (device, &last_ihandle);

+  if (! last_ihandle)

+    return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "can't open device");

+

+  INIT_IEEE1275_COMMON (&args_ieee1275.common, "call-method", 2, 2);

+  args_ieee1275.method = (grub_ieee1275_cell_t) "block-size";

+  args_ieee1275.ihandle = last_ihandle;

+  args_ieee1275.result = 1;

+

+  *block_size = GRUB_DISK_SECTOR_SIZE;

+

+  if ((IEEE1275_CALL_ENTRY_FN (&args_ieee1275) == -1) || (args_ieee1275.result))

+    grub_dprintf ("disk", "can't get block size\n");

+  else

+    if (args_ieee1275.size1

+        && !(args_ieee1275.size1 & (args_ieee1275.size1 - 1))

+        && args_ieee1275.size1 >= 512 && args_ieee1275.size1 <= 16384)

+      *block_size = args_ieee1275.size1;

+

+  return 0;

+}

diff --git a/include/grub/ieee1275/ofdisk.h b/include/grub/ieee1275/ofdisk.h

index 2f69e3f..3f58317 100644

--- a/include/grub/ieee1275/ofdisk.h

+++ b/include/grub/ieee1275/ofdisk.h

@@ -22,4 +22,7 @@

 extern void grub_ofdisk_init (void);

 extern void grub_ofdisk_fini (void);

+extern grub_err_t grub_ofdisk_get_block_size (const char *device,

+                                              grub_uint32_t *block_size);

+

 #endif /* ! GRUB_INIT_HEADER */

-- 

1.8.2.1