31 Mar, 2011
1 commit
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Fixes generated by 'codespell' and manually reviewed.
Signed-off-by: Lucas De Marchi
18 Jan, 2011
1 commit
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* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: (63 commits)
ARM: PL08x: cleanup comments
Update CONFIG_MD_RAID6_PQ to CONFIG_RAID6_PQ in drivers/dma/iop-adma.c
ARM: PL08x: fix a warning
Fix dmaengine_submit() return type
dmaengine: at_hdmac: fix race while monitoring channel status
dmaengine: at_hdmac: flags located in first descriptor
dmaengine: at_hdmac: use subsys_initcall instead of module_init
dmaengine: at_hdmac: no need set ACK in new descriptor
dmaengine: at_hdmac: trivial add precision to unmapping comment
dmaengine: at_hdmac: use dma_address to program DMA hardware
pch_dma: support new device ML7213 IOH
ARM: PL08x: prevent dma_set_runtime_config() reconfiguring memcpy channels
ARM: PL08x: allow dma_set_runtime_config() to return errors
ARM: PL08x: fix locking between prepare function and submit function
ARM: PL08x: introduce 'phychan_hold' to hold on to physical channels
ARM: PL08x: put txd's on the pending list in pl08x_tx_submit()
ARM: PL08x: rename 'desc_list' as 'pend_list'
ARM: PL08x: implement unmapping of memcpy buffers
ARM: PL08x: store prep_* flags in async_tx structure
ARM: PL08x: shrink srcbus/dstbus in txd structure
...
15 Jan, 2011
1 commit
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desc->tx_submit's return type is dma_cookie_t, not int. Therefore,
dmaengine_submit() should match this return type as it's just
wrapping this detail.Signed-off-by: Russell King
Signed-off-by: Dan Williams
03 Jan, 2011
1 commit
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This lets drivers, optionally using the dmaengine, build with DMA_ENGINE
unselected.Signed-off-by: Guennadi Liakhovetski
Signed-off-by: Dan Williams
08 Oct, 2010
4 commits
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The majority of drivers in drivers/dma/ will never establish cross
channel operation chains and do not need the extra overhead in struct
dma_async_tx_descriptor. Make channel switching opt-in by default.Cc: Anatolij Gustschin
Cc: Ira Snyder
Cc: Linus Walleij
Cc: Saeed Bishara
Signed-off-by: Dan Williams -
Now that the generic DMAEngine API has support for scatterlist to
scatterlist copying, the device_prep_slave_sg() portion of the
DMA_SLAVE API is no longer necessary and has been removed.However, the device_control() portion of the DMA_SLAVE API is still
useful to control device specific parameters, such as externally
controlled DMA transfers and maximum burst length.A special dma_ctrl_cmd has been added to enable externally controlled
DMA transfers. This is currently specific to the Freescale DMA
controller, but can easily be made generic when another user is found.Signed-off-by: Ira W. Snyder
Signed-off-by: Dan Williams -
This adds support for scatterlist to scatterlist DMA transfers. A
similar interface is exposed by the fsldma driver (through the DMA_SLAVE
API) and by the ste_dma40 driver (through an exported function).This patch paves the way for making this type of copy operation a part
of the generic DMAEngine API. Futher patches will add support in
individual drivers.Signed-off-by: Ira W. Snyder
Signed-off-by: Dan Williams
06 Oct, 2010
2 commits
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Add wrapper functions around the dma_device->device_control function
to bring back type safety. Also, add a wrapper function around
dma_async_tx_descriptor->tx_submit. This is named dmaengine_submit
instead of dmaengine_tx_submit to get rid of the confusing 'tx' in the
function nameSigned-off-by: Sascha Hauer
Signed-off-by: Dan Williams -
Cyclic transfers are useful for audio where a single buffer divided
in periods has to be transfered endlessly until stopped. After being
prepared the transfer is started using the dma_async_descriptor->tx_submit
function. dma_async_descriptor->callback is called after each period.
The transfer is stopped using the DMA_TERMINATE_ALL callback.
While being used for cyclic transfers the channel cannot be used
for other transfer types.Signed-off-by: Sascha Hauer
Cc: Haavard Skinnemoen
Signed-off-by: Dan Williams
23 Sep, 2010
1 commit
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Add a missing inline keyword for static function in linux/dmaengine.h to
avoid duplicate symbol definitions.Signed-off-by: Mathieu Lacage
Signed-off-by: Dan Williams
05 Aug, 2010
1 commit
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This adds an interface to the DMAengine to make it possible to
reconfigure a slave channel at runtime. We add a few foreseen
config parameters to the passed struct, with a void * pointer
for custom per-device or per-platform runtime slave data.Signed-off-by: Linus Walleij
Signed-off-by: Dan Williams
18 May, 2010
3 commits
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This adds an argument to the DMAengine control function, so that
we can later provide control commands that need some external data
passed in through an argument akin to the ioctl() operation
prototype.[dan.j.williams@intel.com: fix up some missed conversions]
Signed-off-by: Linus Walleij
Signed-off-by: Dan Williams -
Saves 24 bytes per descriptor (64-bit) when the channel-switching
capabilities of async_tx are not required.Signed-off-by: Dan Williams
27 Mar, 2010
3 commits
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Simple conditional struct filler to cut out some duplicated code.
Signed-off-by: Dan Williams
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Convert the device_is_tx_complete() operation on the
DMA engine to a generic device_tx_status()operation which
can return three states, DMA_TX_RUNNING, DMA_TX_COMPLETE,
DMA_TX_PAUSED.[dan.j.williams@intel.com: update for timberdale]
Signed-off-by: Linus Walleij
Acked-by: Mark Brown
Cc: Maciej Sosnowski
Cc: Nicolas Ferre
Cc: Pavel Machek
Cc: Li Yang
Cc: Guennadi Liakhovetski
Cc: Paul Mundt
Cc: Ralf Baechle
Cc: Haavard Skinnemoen
Cc: Magnus Damm
Cc: Liam Girdwood
Cc: Joe Perches
Cc: Roland Dreier
Signed-off-by: Dan Williams -
Convert the device_terminate_all() operation on the
DMA engine to a generic device_control() operation
which can now optionally support also pausing and
resuming DMA on a certain channel. Implemented for the
COH 901 318 DMAC as an example.[dan.j.williams@intel.com: update for timberdale]
Signed-off-by: Linus Walleij
Acked-by: Mark Brown
Cc: Maciej Sosnowski
Cc: Nicolas Ferre
Cc: Pavel Machek
Cc: Li Yang
Cc: Guennadi Liakhovetski
Cc: Paul Mundt
Cc: Ralf Baechle
Cc: Haavard Skinnemoen
Cc: Magnus Damm
Cc: Liam Girdwood
Cc: Joe Perches
Cc: Roland Dreier
Signed-off-by: Dan Williams
05 Mar, 2010
1 commit
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* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: (28 commits)
ioat: cleanup ->timer_fn() and ->cleanup_fn() prototypes
ioat3: interrupt coalescing
ioat: close potential BUG_ON race in the descriptor cleanup path
ioat2: kill pending flag
ioat3: use ioat2_quiesce()
ioat3: cleanup, don't enable DCA completion writes
DMAENGINE: COH 901 318 lli sg offset fix
DMAENGINE: COH 901 318 configure channel direction
DMAENGINE: COH 901 318 remove irq counting
DMAENGINE: COH 901 318 descriptor pool refactoring
DMAENGINE: COH 901 318 cleanups
dma: Add MPC512x DMA driver
Debugging options for the DMA engine subsystem
iop-adma: redundant/wrong tests in iop_*_count()?
dmatest: fix handling of an even number of xor_sources
dmatest: correct raid6 PQ test
fsldma: Fix cookie issues
fsldma: Fix cookie issues
dma: cases IPU_PIX_FMT_BGRA32, BGR32 and ABGR32 are the same in ipu_ch_param_set_size()
dma: make Open Firmware device id constant
...
01 Mar, 2010
1 commit
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fsl_dma_update_completed_cookie() appears to calculate the last completed
cookie incorrectly in the corner case where DMA on cookie 1 is in progress
just following a cookie wrap.Signed-off-by: Steven J. Magnani
Acked-by: Ira W. Snyder
[dan.j.williams@intel.com: fix an integer overflow warning with INT_MAX]
Signed-off-by: Dan Williams
17 Feb, 2010
1 commit
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Add __percpu sparse annotations to places which didn't make it in one
of the previous patches. All converions are trivial.These annotations are to make sparse consider percpu variables to be
in a different address space and warn if accessed without going
through percpu accessors. This patch doesn't affect normal builds.Signed-off-by: Tejun Heo
Acked-by: Borislav Petkov
Cc: Dan Williams
Cc: Huang Ying
Cc: Len Brown
Cc: Neil Brown
11 Dec, 2009
1 commit
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DMA_CTRL_ACK's description applies to its clear state, not to its set state.
Signed-off-by: Guennadi Liakhovetski
Signed-off-by: Dan Williams
09 Sep, 2009
7 commits
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Conflicts:
crypto/async_tx/async_xor.c
drivers/dma/ioat/dma_v2.h
drivers/dma/ioat/pci.c
drivers/md/raid5.c -
The tx_list attribute of struct dma_async_tx_descriptor is common to
most, but not all dma driver implementations. None of the upper level
code (dmaengine/async_tx) uses it, so allow drivers to implement it
locally if they need it. This saves sizeof(struct list_head) bytes for
drivers that do not manage descriptors with a linked list (e.g.: ioatdma
v2,3).Signed-off-by: Dan Williams
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Some engines have transfer size and address alignment restrictions. Add
a per-operation alignment property to struct dma_device that the async
routines and dmatest can use to check alignment capabilities.Signed-off-by: Dan Williams
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No drivers currently implement these operation types, so they can be
deleted.Signed-off-by: Dan Williams
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Channel switching is problematic for some dmaengine drivers as the
architecture precludes separating the ->prep from ->submit. In these
cases the driver can select ASYNC_TX_DISABLE_CHANNEL_SWITCH to modify
the async_tx allocator to only return channels that support all of the
required asynchronous operations.For example MD_RAID456=y selects support for asynchronous xor, xor
validate, pq, pq validate, and memcpy. When
ASYNC_TX_DISABLE_CHANNEL_SWITCH=y any channel with all these
capabilities is marked DMA_ASYNC_TX allowing async_tx_find_channel() to
quickly locate compatible channels with the guarantee that dependency
chains will remain on one channel. When
ASYNC_TX_DISABLE_CHANNEL_SWITCH=n async_tx_find_channel() may select
channels that lead to operation chains that need to cross channel
boundaries using the async_tx channel switch capability.Signed-off-by: Dan Williams
-
Some engines optimize operation by reading ahead in the descriptor chain
such that descriptor2 may start execution before descriptor1 completes.
If descriptor2 depends on the result from descriptor1 then a fence is
required (on descriptor2) to disable this optimization. The async_tx
api could implicitly identify dependencies via the 'depend_tx'
parameter, but that would constrain cases where the dependency chain
only specifies a completion order rather than a data dependency. So,
provide an ASYNC_TX_FENCE to explicitly identify data dependencies.Signed-off-by: Dan Williams
-
Conflicts:
include/linux/dmaengine.h
30 Aug, 2009
2 commits
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[ Based on an original patch by Yuri Tikhonov ]
This adds support for doing asynchronous GF multiplication by adding
two additional functions to the async_tx API:async_gen_syndrome() does simultaneous XOR and Galois field
multiplication of sources.async_syndrome_val() validates the given source buffers against known P
and Q values.When a request is made to run async_pq against more than the hardware
maximum number of supported sources we need to reuse the previous
generated P and Q values as sources into the next operation. Care must
be taken to remove Q from P' and P from Q'. For example to perform a 5
source pq op with hardware that only supports 4 sources at a time the
following approach is taken:p, q = PQ(src0, src1, src2, src3, COEF({01}, {02}, {04}, {08}))
p', q' = PQ(p, q, q, src4, COEF({00}, {01}, {00}, {10}))p' = p + q + q + src4 = p + src4
q' = {00}*p + {01}*q + {00}*q + {10}*src4 = q + {10}*src4Note: 4 is the minimum acceptable maxpq otherwise we punt to
synchronous-software path.The DMA_PREP_CONTINUE flag indicates to the driver to reuse p and q as
sources (in the above manner) and fill the remaining slots up to maxpq
with the new sources/coefficients.Note1: Some devices have native support for P+Q continuation and can skip
this extra work. Devices with this capability can advertise it with
dma_set_maxpq. It is up to each driver how to handle the
DMA_PREP_CONTINUE flag.Note2: The api supports disabling the generation of P when generating Q,
this is ignored by the synchronous path but is implemented by some dma
devices to save unnecessary writes. In this case the continuation
algorithm is simplified to only reuse Q as a source.Cc: H. Peter Anvin
Cc: David Woodhouse
Signed-off-by: Yuri Tikhonov
Signed-off-by: Ilya Yanok
Reviewed-by: Andre Noll
Acked-by: Maciej Sosnowski
Signed-off-by: Dan Williams -
Replace the flat zero_sum_result with a collection of flags to contain
the P (xor) zero-sum result, and the soon to be utilized Q (raid6 reed
solomon syndrome) zero-sum result. Use the SUM_CHECK_ namespace instead
of DMA_ since these flags will be used on non-dma-zero-sum enabled
platforms.Reviewed-by: Andre Noll
Acked-by: Maciej Sosnowski
Signed-off-by: Dan Williams
13 May, 2009
1 commit
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as reported by Alexander Beregalov
ioatdma 0000:00:08.0: DMA-API: device driver frees DMA memory with
wrong function [device address=0x000000007f76f800] [size=2000 bytes]
[map
ped as single] [unmapped as page]The ioatdma driver was unmapping all regions
(either allocated as page or single) using unmap_page.
This patch lets dma driver recognize if unmap_single or unmap_page should be used.
It introduces two new dma control flags:
DMA_COMPL_SRC_UNMAP_SINGLE and DMA_COMPL_DEST_UNMAP_SINGLE.
They should be set to indicate dma driver to do dma-unmapping as single
(first one for the source, tha latter for the destination).
If respective flag is not set, the driver assumes dma-unmapping as page.Signed-off-by: Maciej Sosnowski
Reported-by: Alexander Beregalov
Tested-by: Alexander Beregalov
Signed-off-by: Dan Williams
09 Apr, 2009
1 commit
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'zero_sum' does not properly describe the operation of generating parity
and checking that it validates against an existing buffer. Change the
name of the operation to 'val' (for 'validate'). This is in
anticipation of the p+q case where it is a requirement to identify the
target parity buffers separately from the source buffers, because the
target parity buffers will not have corresponding pq coefficients.Reviewed-by: Andre Noll
Acked-by: Maciej Sosnowski
Signed-off-by: Dan Williams
27 Mar, 2009
1 commit
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Currently dma_request_channel() set DMA_PRIVATE capability but never
clear it. So if a public channel was once grabbed by
dma_request_channel(), the device stay PRIVATE forever. Add
privatecnt member to dma_device to correctly revert it.[lg@denx.de: fix bad usage of 'chan' in dma_async_device_register]
Signed-off-by: Atsushi Nemoto
Acked-by: Maciej Sosnowski
Signed-off-by: Dan Williams
26 Mar, 2009
2 commits
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Provide a config option for blocking the allocation of dma channels to
the async_tx api.Signed-off-by: Dan Williams
-
The dmaengine redux left some unneeded headers in
include/linux/dmaengine.h, clean them up.Signed-off-by: Dan Williams
09 Mar, 2009
1 commit
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* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx:
dmatest: fix use after free in dmatest_exit
ipu_idmac: fix spinlock type
iop-adma, mv_xor: fix mem leak on self-test setup failure
fsldma: fix off by one in dma_halt
I/OAT: fail self-test if callback test reaches timeout
I/OAT: update driver version and copyright dates
I/OAT: list usage cleanup
I/OAT: set tcp_dma_copybreak to 256k for I/OAT ver.3
I/OAT: cancel watchdog before dma remove
I/OAT: fail initialization on zero channels detection
I/OAT: do not set DCACTRL_CMPL_WRITE_ENABLE for I/OAT ver.3
I/OAT: add verification for proper APICID_TAG_MAP setting by BIOS
dmaengine: update kerneldoc
19 Feb, 2009
1 commit
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The conversion of atmel-mci to dma_request_channel missed the
initialization of the channel dma_slave information. The filter_fn passed
to dma_request_channel is responsible for initializing the channel's
private data. This implementation has the additional benefit of enabling
a generic client-channel data passing mechanism.Reviewed-by: Atsushi Nemoto
Signed-off-by: Dan Williams
Acked-by: Haavard Skinnemoen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
12 Feb, 2009
1 commit
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Some of the kerneldoc comments in the dmaengine header describe
already removed structure members. Remove them.Also add a short description for dma_device->device_is_tx_complete.
Signed-off-by: Johannes Weiner
Signed-off-by: Dan Williams
07 Feb, 2009
1 commit
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Based upon a patch from Atsushi Nemoto
--------------------
The commit 649274d993212e7c23c0cb734572c2311c200872 ("net_dma:
acquire/release dma channels on ifup/ifdown") added unconditional call
of dmaengine_get() to net_dma. The API should be called only if
NET_DMA was enabled.
--------------------Signed-off-by: David S. Miller
Acked-by: Dan Williams
