common/partitions/efi: fix gpt detection ...

On some boards (such as i.MX) the buffer might contain both:
A barebox image *and* a GPT partition table.

Thus, irrelevant filetypes should be ignored.

partitions: efi: Constify force_gpt ...

No one is modifying 'force_gpt', so constify it to reflect that fact.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

partitions: dos: Treat all extended partition types equally ...

Creating logical DOS partitions with fdisk (Fedora 27, fdisk from
util-linux 2.30.2) results in extended partition of type 0x05 being
created on the device. Partitioned like this, device is succesfully
recognized by Linux, but, due to algorithm in dos_partition(), not
Barebox.

Looking closer at the actual contents of MBR shows that while marked
as "Extended partition with CHS addressing" that partition still have
all of the LBA adressed fields filled correctly.

Given the above and the fact that similar code in Linux
kernel (block/partitions/msdos.c) does not make a distinction between
types 0x0f and 0x05, port Linux's is_extended_partition() and convert
the code to treat types 0x05, 0x0f and 0x85 the same way.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

param: make parameter functions more consistent ...

This patch creates a consitent set of device parameter functions.

With this we have: dev_add_param_<type><access>

"type" is one of: int32, uint32, int64, uint64, string, mac, ipv4, enum, bitmask
The improvement here is that we now can exactly specify the width of the
int type parameters and also correctly distinguish between signed and
unsigned variables which means that a variable no longer ends up with
INT_MAX when it's assigned -1.

"access" can be empty for regular read/write parameter, "_ro" for readonly
parameters which get their value from a variable pointer in the
background or "_fixed" for parameters which are set to a fixed value
(without a pointer in the background).

Some more exotic types are not (yet) implemented, like
dev_add_param_ip_ro.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

partitions: dos: add partuuid string for logical partitions ...

Commit bc31d85c6e23 ("cdev: Add partuuid string to struct cdev") added
partuuid strings for dos partitions but only for the (up to) four
primary partitions. Do the same for the logical partitions. Their
numbers start at 5 independently of the number of available primary
partitions.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

include: move crc specific stuff to crc.h ...

We have a crc.h, so move our crc function prototypes there to further
cleanup common.h.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

partitions/efi: Add partuuid to partition description ...

In commit bc31d85 the partition UUID
was added to the partition struct and thence to the cdev(s) for the
partition.  But just for DOS partitions.  Do this for GPT aka EFI
partitions too.

Signed-off-by: Trent Piepho <tpiepho@kymetacorp.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

cdev: Add partuuid string to struct cdev ...

This adds the partuuid string to struct cdev in order to have this
available for constructing a suitable Linux root=PARTUUID= option
for booting Linux.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

partitions/efi: Fix off-by-one error in 'last_lba' ...

LBAs are numbered starting from zero so the last LBA # would be equal
to total number of blocks minus one.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Add initial EFI architecture support ...

This adds support for running barebox in an EFI environment
on X86 PC hardware.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Move efi.h to include/ ...

With upcoming EFI payload support the efi.h file will diverge
from the kernel, so move it from include/linux/ to include/

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

treewide: remove address of the Free Software Foundation ...

The FSF address has changed; The FSF site says that
address is

  Free Software Foundation
  51 Franklin Street, Fifth Floor
  Boston, MA 02110-1301
  USA

(see http://www.fsf.org/about/contact/)

Instead of updating it each time the address changes,
just drop it completely treewide.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

partitions: dos: parse extended partition ...

DOS MBRs might contain an extended partition that holds several logical
partitions. Add these to the partitions of the block device.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

partitions: dos: don't open code get_unaligned_le32 ...

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

partitions: dos: improve guess of disk size ...

The code used to ineffectively take the end of the last partition as guess
for the disk size. Better use the end of the partition that has its end
rearmost.

Also return an unsigned type instead of int as the result is always
non-negative.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

cdev: store dos partition type in struct cdev ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

partitions: dos: fix memory leak in nt disk signature ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

partition: DOS: Add parameter for the NT disk Signature ...

The NT disk Signature is a unique 32-bit value in the MBR allowing
to identify a MSDOS partitioned disk. The signature can be used to
specify the Linux rootfs.
This patch adds support for the NT disk Signature in the form of a
device parameter which can both be read and written.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

partitions: Add missing depends on BLOCK ...

The disk partitions use blockdevice functions, so add the corresponding
depends on BLOCK.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

block: implement block_read/block_write functions ...

Some drivers use blk->ops->read/write. This bypasses the caching block
layer and was never intended like this. The upper API to the block layer
is the cdev layer. This patch adds block_read and block_write functions
and uses them where appropriate.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

disk: partitions: add EFI GUID Partition Table ...

form linux 3.8

so you can have part by num or name
not by GUID as this is a non human reading name

     `---- ffe08000.sata
          `---- 0x00000000-0x3fffffff: /dev/ata0
          `---- 0x00100000-0x063fffff: /dev/ata0.0
          `---- 0x00100000-0x063fffff: /dev/ata0.boot
          `---- 0x06400000-0x3fefffff: /dev/ata0.1
          `---- 0x06400000-0x3fefffff: /dev/ata0.linux

Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

disk: introduce partition name ...

so we can register partion with name as present in EFI GPT

Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

partitons: add framework ...

so we can support multiple format

use filetpye to detect the parser to use

Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>