dm: blk: Fix warning on !CONFIG_BLK

When we don't have CONFIG_BLK defined we don't have a forward
declaration of struct udevice, and thus get a warning about it on
blk_get_from_parent(), which we on

dm: blk: Fix warning on !CONFIG_BLK

When we don't have CONFIG_BLK defined we don't have a forward
declaration of struct udevice, and thus get a warning about it on
blk_get_from_parent(), which we only have when CONFIG_BLK is set. Move
the declaration of blk_get_from_parent() to be with the other CONFIG_BLK
parts.

Fixes 9f103b9cb5f8 ("dm: blk: Add a way to obtain a block device from ...")
Signed-off-by: Tom Rini <trini@konsulko.com>

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Merge branch 'master' of git://git.denx.de/u-boot-mmc

dm: blk: Add a way to obtain a block device from its parent

Many devices support a child block device (e.g. MMC, USB). Add a
convenient way to get this device given the parent device.

Signed-off-by

dm: blk: Add a way to obtain a block device from its parent

Many devices support a child block device (e.g. MMC, USB). Add a
convenient way to get this device given the parent device.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

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dm: blk: Allow finding block devices without probing

Sometimes it is useful to be able to find a block device without also
probing it. Add a function for this as well as the associated test.

Signed

dm: blk: Allow finding block devices without probing

Sometimes it is useful to be able to find a block device without also
probing it. Add a function for this as well as the associated test.

Signed-off-by: Simon Glass <sjg@chromium.org>

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Merge branch 'master' of git://git.denx.de/u-boot

Merge git://git.denx.de/u-boot-dm

dm: blk: Add a comment as to why the bdev member is needed

This member should be explained, since it is not obvious why it is needed.
Add a comment.

Signed-off-by: Simon Glass <sjg@chromium.org>

dm: blk: Add functions to select a hardware partition

The block device uclass does not currently support selecting a particular
hardware partition but this is needed for MMC. Add it so that the blk

dm: blk: Add functions to select a hardware partition

The block device uclass does not currently support selecting a particular
hardware partition but this is needed for MMC. Add it so that the blk API
can support MMC properly.

Signed-off-by: Simon Glass <sjg@chromium.org>

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dm: blk: Add a easier way to create a named block device

Add a function that automatically builds the device name given the parent
and a supplied string. Most callers will want to do this, so puttin

dm: blk: Add a easier way to create a named block device

Add a function that automatically builds the device name given the parent
and a supplied string. Most callers will want to do this, so putting this
functionality in one place makes more sense.

Signed-off-by: Simon Glass <sjg@chromium.org>

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dm: blk: Allow blk_create_device() to allocate the device number

Allow a devnum parameter of -1 to indicate that the device number should be
alocated automatically. The next highest available device

dm: blk: Allow blk_create_device() to allocate the device number

Allow a devnum parameter of -1 to indicate that the device number should be
alocated automatically. The next highest available device number for that
interface type is used.

Signed-off-by: Simon Glass <sjg@chromium.org>

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dm: systemace: Add a legacy block interface

Add a legacy block interface for systemace.

Signed-off-by: Simon Glass <sjg@chromium.org>

dm: blk: Add a legacy block interface

There is quite a bit of duplicated common code related to block devices
in the IDE and SCSI implementations.

Create some helper functions that can be used to r

dm: blk: Add a legacy block interface

There is quite a bit of duplicated common code related to block devices
in the IDE and SCSI implementations.

Create some helper functions that can be used to reduce the duplication.
These rely on a linker list of interface-type drivers

Signed-off-by: Simon Glass <sjg@chromium.org>

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drivers: block: fix placement of parameters

Signed-off-by: Eric Nelson <eric@nelint.com>

drivers: block: add block device cache

Add a block device cache to speed up repeated reads of block devices by
various filesystems.

This small amount of cache can dramatically speed up filesystem
o

drivers: block: add block device cache

Add a block device cache to speed up repeated reads of block devices by
various filesystems.

This small amount of cache can dramatically speed up filesystem
operations by skipping repeated reads of common areas of a block
device (typically directory structures).

This has shown to have some benefit on FAT filesystem operations of
loading a kernel and RAM disk, but more dramatic benefits on ext4
filesystems when the kernel and/or RAM disk are spread across
multiple extent header structures as described in commit fc0fc50.

The cache is implemented through a minimal list (block_cache) maintained
in most-recently-used order and count of the current number of entries
(cache_count). It uses a maximum block count setting to prevent copies
of large block reads and an upper bound on the number of cached areas.

The maximum number of entries in the cache defaults to 32 and the maximum
number of blocks per cache entry has a default of 2, which has shown to
produce the best results on testing of ext4 and FAT filesystems.

The 'blkcache' command (enabled through CONFIG_CMD_BLOCK_CACHE) allows
changing these values and can be used to tune for a particular filesystem
layout.

Signed-off-by: Eric Nelson <eric@nelint.com>

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Merge git://git.denx.de/u-boot-dm

dm: blk: Add a block-device uclass

Add a uclass for block devices. These provide block-oriented data access,
supporting reading, writing and erasing of whole blocks.

Signed-off-by: Simon Glass <sjg

dm: blk: Add a block-device uclass

Add a uclass for block devices. These provide block-oriented data access,
supporting reading, writing and erasing of whole blocks.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Stephen Warren <swarren@nvidia.com>

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dm: block: Adjust device calls to go through helpers function

To ease conversion to driver model, add helper functions which deal with
calling each block device method. With driver model we can reim

dm: block: Adjust device calls to go through helpers function

To ease conversion to driver model, add helper functions which deal with
calling each block device method. With driver model we can reimplement these
functions with the same arguments.

Use inline functions to avoid increasing code size on some boards.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Stephen Warren <swarren@nvidia.com>

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dm: block: Rename device number member dev to devnum

This is a device number, and we want to use 'dev' to mean a driver model
device. Rename the member.

Signed-off-by: Simon Glass <sjg@chromium.org

dm: block: Rename device number member dev to devnum

This is a device number, and we want to use 'dev' to mean a driver model
device. Rename the member.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Stephen Warren <swarren@nvidia.com>

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dm: blk: Convert interface type to an enum

Since these are sequentially numbered it makes sense to use an enum. It
avoids having to maintain the maximum value, and provides a type we can use
if it i

dm: blk: Convert interface type to an enum

Since these are sequentially numbered it makes sense to use an enum. It
avoids having to maintain the maximum value, and provides a type we can use
if it is useful.

In fact the maximum value is not used. Rename it to COUNT, since MAX suggests
it is the maximum valid value, but it is not.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Stephen Warren <swarren@nvidia.com>

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dm: Add a new header for block devices

At present block devices are tied up with partitions. But not all block
devices have partitions within them. They are in fact separate concepts.

Create a sepa

dm: Add a new header for block devices

At present block devices are tied up with partitions. But not all block
devices have partitions within them. They are in fact separate concepts.

Create a separate blk.h header file for block devices.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Stephen Warren <swarren@nvidia.com>

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