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* Merge branch 'for-next/misc'Sascha Hauer2019-02-131-24/+23
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| * block: Move shared code in get_chunk() out of if statementAndrey Smirnov2019-01-221-3/+2
| | | | | | | | | | Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * block: Do not write past block device boundary during a flushAndrey Smirnov2019-01-221-9/+13
| | | | | | | | | | | | | | | | | | | | | | | | When calling I/O functions of underlying block device driver we always need to make sure that its size is small enough to not go past device's boundary. Not only in get_chunk() and block_cache(), but in writebuffer_flush() as well. Since the same code is used in three different places, move it into a subroutine and adjust all of the calls to ->write()/->read() accordingly. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * block: Replace debug() with dev_dbg()Andrey Smirnov2019-01-181-5/+6
| | | | | | | | | | | | | | | | | | All of the functions using debug() in that file have enough info to use dev_dbg instead. Convert all of the uses of debug() to dev_dbg() in order to get more informative debug output. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * block: Alias block_op_close() to block_op_flush()Andrey Smirnov2019-01-181-7/+2
| | | | | | | | | | | | | | | | | | The two functions are identical, so there's no need to keep two copies of the same code around. Alias block_op_close() to block_op_flush() and drop standalone definition for the former. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | devfs: Drop dev_lseek_default()Andrey Smirnov2019-01-291-1/+0
|/ | | | | | | | | | | | | | | | | | | | | Only the following cdevs do not declare an .lseek() operation: - Console devices in common/console.c - Firmware framework in common/firmware.c - JTAG driver in drivers/misc/jtag.c - UBI in drivers/mtd/ubi/barebox.c Of those four, first two are marked DEVFS_IS_CHARACTER_DEV and implement only .write() operation and the last two don't implement anything but .ioctl(). While there's probably no meaningful way to use lseek() against any of those devices, there doesn't seem to be any harm in allowing it either. Change devfs_lseek() to ignore absense of .lseek() callback and drop dev_lseek_default() and all references to it in the codebase. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* block: Do not ignore error in blk->ops->write()Andrey Smirnov2018-08-311-3/+14
| | | | | | | | | | | Getting a error from blk->ops->write() is not a very unlikely event (happens quite often during new board bringup), so we need to catch and propagate them to upper layers so they can be at least reported properly. Change the code of all of the callers to bail out as soon as blk->ops->write() fails. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* block: Adjust cache sizesSascha Hauer2018-07-131-2/+2
| | | | | | | | Use four times more cache entries and divide the memory for each entry by four. This lowers the linear read throughput somewhat but increases the access speed for filesystems. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* rename file_operations -> cdev_operationsSascha Hauer2018-04-061-1/+1
| | | | | | | | Linux also has struct file_operations which are something different. Rename our file_operations to cdev_operations which better matches what we have. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: Create automount entries for the default mount pathesSascha Hauer2017-05-101-0/+2
| | | | | | | | | | In barebox the default mount path for a cdev is /mnt/<cdevname> which can be mounted with "mount <cdevname>" without specifying a target path explicitly. Simplify this further by creating automount entries for the default mount pathes which makes a manual mount completely unnecessary. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* block: Add flush callbackSascha Hauer2014-07-141-0/+3
| | | | | | | Some block devices need an explicit callback for flushing written blocks. Add this callback. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* block: Collect block devices on listSascha Hauer2013-09-301-0/+5
| | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* block: shortcut writebuffer_flush if writing is disabledSascha Hauer2013-07-221-0/+3
| | | | | | Saves a few bytes of binary space. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* block: implement block_read/block_write functionsSascha Hauer2013-05-311-0/+22
| | | | | | | | | 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>
* block: rename file operation functionsSascha Hauer2013-05-311-8/+8
| | | | | | | block_read and block_write collide with a to-be-introduced global function, so rename the file operation functions. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Treewide: remove address of the Free Software FoundationSascha Hauer2012-09-171-3/+0
| | | | | | | The FSF address has changed in the past. Instead of updating it each time the address changes, just drop it completely treewide. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Merge branch 'for-next/dma-cache-align'Sascha Hauer2012-07-021-3/+4
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| * block: use dma_alloc to allocate buffersSascha Hauer2012-06-301-3/+4
| | | | | | | | | | | | | | Drivers may use dma to transfer blocks, so put them into dma save memory. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | make cdev 64bit capableSascha Hauer2012-06-301-1/+1
| | | | | | | | | | | | Next step to 64bit support: Make cdev size a 64bit type. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | use loff_t for file offsetsSascha Hauer2012-06-301-2/+2
|/ | | | | | | This is a first step for 64bit file support: Make the file sizes/offsets 64bit. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* block: Fix printf warningAlexander Shiyan2012-05-311-1/+1
| | | | | Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* block: do not BUG() on failed block_getSascha Hauer2012-05-301-1/+1
| | | | | | | It does not necessarily means a bug when block_get fails here, this can also be a failure on the underlying device. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* block: propagate error code from block_getSascha Hauer2012-05-301-13/+13
| | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* block: reimplement cachingSascha Hauer2012-02-151-73/+201
| | | | | | | | | | | The current caching layer only has a single buffer for writing and reading. The FAT driver often accesses the fat and then data again, which currently can't be cached. Reimplement this with a list of cached chunks. The number of chunks and their sizes are currently hardcoded, but that could be easily made configurable. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* add block supportSascha Hauer2011-04-111-0/+263
This adds a simple block layer to barebox. Reading and writing to block devices can be painfully slow without caching, so add a simple caching layer here. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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