14 Feb, 2013
1 commit
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Fix dma_tc_handle() to call d40_desc_remove() and d40_desc_done() only
for non-cyclic transfers, as this was breaking ux500_pcm since
introduced in:d49278e dmaengine: dma40: Add support to split up large elements
Reported-by: Shreshtha Kumar Sahu
Acked-by: Linus Walleij
Signed-off-by: Fabio Baltieri
Signed-off-by: Vinod Koul
21 Jan, 2013
1 commit
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Pull ste_dma40 fixes from Fabio
Signed-off-by: Vinod Koul
14 Jan, 2013
13 commits
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Clock code was changed to use clk_prepare_enable in:
b707c65 dma/ste_dma40: Fixup clock usage during probe
but clk_disable on probe fail path was not updated. This patch fix this
by using clk_disable_unprepare in place of clk_disable.Acked-by: Ulf Hansson
Acked-by: Linus Walleij
Acked-by: Vinod Koul
Signed-off-by: Fabio Baltieri -
Some DMA channels may be used by other cores in the SoC. This patch
modifies the dma interrupt handler to ignore interrupts from unknown
channels.Cc: Rabin Vincent
Acked-by: Linus Walleij
Acked-by: Vinod Koul
Signed-off-by: Fabio Baltieri -
This patch add support to manage LLI by SW for select phy channels.
There is a HW issue in certain controllers due to which on certain
occassions HW LLI cannot be used on some physical channels. To avoid
the HW issue on a specific phy channel, the phy channel number can be
added to the list of soft_lli_channels and there after all the transfers
on that channel will use software LLI, for peripheral to memory
transfers.SoftLLI introduces relink overhead, that could impact performace for
certain use cases.This is based on a previous patch of Narayanan Gopalakrishnan.
Cc: Shreshtha Kumar Sahu
Acked-by: Linus Walleij
Acked-by: Vinod Koul
Signed-off-by: Fabio Baltieri -
Use internal variables to the cycles to improve code readability, no
functional changes.Acked-by: Linus Walleij
Acked-by: Vinod Koul
Signed-off-by: Fabio Baltieri -
This patch contains various non functional cosmetic fixes.
Acked-by: Linus Walleij
Acked-by: Vinod Koul
Signed-off-by: Fabio Baltieri -
This is to keep the active queue for only those transfers which are
actually active in the hardware. Descriptors will be moved to the done
queue after they are completed in the hardware (interrupt handler) but
before all the cleanup work has been completed (tasklet).Mostly based on a previous patch by Rabin Vincent.
Cc: Rabin Vincent
Acked-by: Linus Walleij
Acked-by: Vinod Koul
Signed-off-by: Fabio Baltieri -
U8540 DMA controller is different from u9540 we need define new
registers and use them to support handling more than 128 event lines.Signed-off-by: Tong Liu
Reviewed-by: Per Forlin
Acked-by: Linus Walleij
Acked-by: Vinod Koul
Signed-off-by: Fabio Baltieri -
DMAC_ICFG[0:2]=SCHNB only allows to count 'multiple of 4' physical
channels so it was ok with platforms having 8 channels but cannot be
used for next versions (with 10 or 14 channels). This patch allows to
provide the number of physical channels for a DMA device via
platform_data, or still rely on SCHNB if platform_data announces 0
channel.Signed-off-by: Gerald Baeza
Reviewed-by: Per Forlin
Acked-by: Linus Walleij
Acked-by: Vinod Koul
Signed-off-by: Fabio Baltieri -
This patch makes existing use_fixed_channel field (of stedma40_chan_cfg
structure) applicable to physical channels.Signed-off-by: Gerald Baeza
Tested-by: Yannick Fertre
Reviewed-by: Per Forlin
Acked-by: Linus Walleij
Acked-by: Vinod Koul
Signed-off-by: Fabio Baltieri -
Hardware bug: when a logical channel is triggerred by a high priority
destination event line, an extra packet transaction is generated in case
of important data write response latency on previous logical channel A
and if the source transfer of current logical channel B is already
completed and if no other channel with a higher priority than B is
waiting for execution.Software workaround: do not set the high priority level for the
destination event lines that trigger logical channels.Signed-off-by: Rabin Vincent
Reviewed-by: Shreshtha Kumar Sahu
Acked-by: Linus Walleij
Acked-by: Vinod Koul
Signed-off-by: Fabio Baltieri -
The check for runtime suspend is not needed during a regular suspend, as
the framework takes care of this. This fixes the issue of DMA driver
not letting the system to go to deepsleep in the first attempt.Signed-off-by: Narayanan G
Reviewed-by: Rabin Vincent
Acked-by: Linus Walleij
Acked-by: Vinod Koul
Signed-off-by: Fabio Baltieri -
The client is not aware of the maximum burst size in the dma driver. If
the size exceeds 16 set max to 16.Signed-off-by: Per Forlin
Acked-by: Linus Walleij
Acked-by: Vinod Koul
Signed-off-by: Fabio Baltieri -
Maximum DMA seg size is (0xffff x data_width). If max seg
size is not set it deafults to 64k. This results in failure
if transferring 64k in byte mode.
Large seg sizes may be supported by splitting large transfer.Signed-off-by: Per Forlin
Acked-by: Linus Walleij
Acked-by: Vinod Koul
Signed-off-by: Fabio Baltieri
12 Jan, 2013
1 commit
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The is_slave_direction helps to check if the transfer type is slave.
Signed-off-by: Andy Shevchenko
Reviewed-by: Viresh Kumar
Reviewed-by: Linus Walleij
Signed-off-by: Vinod Koul
05 Nov, 2012
1 commit
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This moves the DMA40 platform data header from
to where is belongs.Cc: Dan Williams
Cc: Mark Brown
Cc: Ola Lilja
Cc: Herbert Xu
Cc: Andreas Westin
Acked-by: Vinod Koul
Acked-by: Arnd Bergmann
Signed-off-by: Linus Walleij
10 Oct, 2012
1 commit
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Pull slave-dmaengine updates from Vinod Koul:
"This time we have Andy updates on dw_dmac which is attempting to make
this IP block available as PCI and platform device though not fully
complete this time.We also have TI EDMA moving the dma driver to use dmaengine APIs, also
have a new driver for mmp-tdma, along with bunch of small updates.Now for your excitement the merge is little unusual here, while
merging the auto merge on linux-next picks wrong choice for pl330
(drivers/dma/pl330.c) and this causes build failure. The correct
resolution is in linux-next. (DMA: PL330: Fix build error) I didn't
back merge your tree this time as you are better than me so no point
in doing that for me :)"Fixed the pl330 conflict as in linux-next, along with trivial header
file conflicts due to changed includes.* 'next' of git://git.infradead.org/users/vkoul/slave-dma: (29 commits)
dma: tegra: fix interrupt name issue with apb dma.
dw_dmac: fix a regression in dwc_prep_dma_memcpy
dw_dmac: introduce software emulation of LLP transfers
dw_dmac: autoconfigure data_width or get it via platform data
dw_dmac: autoconfigure block_size or use platform data
dw_dmac: get number of channels from hardware if possible
dw_dmac: fill optional encoded parameters in register structure
dw_dmac: mark dwc_dump_chan_regs as inline
DMA: PL330: return ENOMEM instead of 0 from pl330_alloc_chan_resources
DMA: PL330: Remove redundant runtime_suspend/resume functions
DMA: PL330: Remove controller clock enable/disable
dmaengine: use kmem_cache_zalloc instead of kmem_cache_alloc/memset
DMA: PL330: Set the capability of pdm0 and pdm1 as DMA_PRIVATE
ARM: EXYNOS: Set the capability of pdm0 and pdm1 as DMA_PRIVATE
dma: tegra: use list_move_tail instead of list_del/list_add_tail
mxs/dma: Enlarge the CCW descriptor area to 4 pages
dw_dmac: utilize slave_id to pass request line
dmaengine: mmp_tdma: add dt support
dmaengine: mmp-pdma support
spi: davici - make davinci select edma
...
22 Sep, 2012
1 commit
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Change the parameter list of device_prep_dma_cyclic() so the DMA drivers
can receive the flags coming from clients.
This feature can be used during audio operation to disable all audio
related interrupts when the DMA_PREP_INTERRUPT is cleared from the flags.Signed-off-by: Peter Ujfalusi
Acked-by: Nicolas Ferre
Acked-by: Shawn Guo
Acked-by: Vinod Koul
Signed-off-by: Mark Brown
31 Aug, 2012
1 commit
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Fixup some errorhandling for clocks during probe and make sure
to use clk_prepare as well as clk_enable.Signed-off-by: Ulf Hansson
Acked-by: Linus Walleij
Signed-off-by: Vinod Koul
11 May, 2012
1 commit
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sg->length may or may not contain the length of the dma region to transfer,
depending on the architecture - dma_sg_len(sg) always will though. For the
architectures which use the drivers modified by this patch it probably is the
case that sg->length contains the dma transfer length. But to be consistent and
future proof change them to use dma_sg_len.To quote Russel King:
sg->length is meaningless to something performing DMA.In cases where sg_dma_len(sg) and sg->length are the same storage, then
there's no problem. But scatterlists _can_ (and one some architectures) do
split them - especially when you have an IOMMU which can allow you to
combine a scatterlist into fewer entries.So, anything using sg->length for the size of a scatterlist's DMA transfer
_after_ a call to dma_map_sg() is almost certainly buggy.The patch has been generated using the following coccinelle patch:
@@
struct scatterlist *sg;
expression X;
@@
-sg[X].length
+sg_dma_len(&sg[X])
@@
struct scatterlist *sg;
@@
-sg->length
+sg_dma_len(sg)Signed-off-by: Lars-Peter Clausen
Acked-by: Linus Walleij
Signed-off-by: Vinod Koul
23 Apr, 2012
3 commits
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A small fallout from Vinod's conversions to dma_transfer_direction,
this small comparison was done with a dma_data_direction instead.
Fix it by comparing against the correct enum.Signed-off-by: Linus Walleij
Signed-off-by: Vinod Koul -
The patch "ARM: amba: Remove AMBA level regulator support" breaks
the DMA40 driver since the header implicitly
included the regulator consumer header. So include it explicitly
and fix the build error.Cc: Mark Brown
Signed-off-by: Linus Walleij
Signed-off-by: Vinod Koul -
can be directly stopped by issuing a SUSPEND_REQ on the EE
bits. There is no need to suspend the physical channel and
restart it.Also, the support for pre-V2 hw is discontinued.
EE bits for writing:
00: disable only if AS=11 or AS=00
01: enable
10: suspend_req only if AS=01 & EE=01 or EE=11
11: round / no change for writingSigned-off-by: Narayanan G
Acked-by: Linus Walleij
Signed-off-by: Vinod Koul
21 Mar, 2012
1 commit
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Add context parameter to device_prep_slave_sg() and device_prep_dma_cyclic()
interfaces to allow passing client/target specific information associated
with the data transfer.
Modify all affected DMA engine drivers.Signed-off-by: Alexandre Bounine
Acked-by: Linus Walleij
Acked-by: Felipe Balbi
Signed-off-by: Vinod Koul
13 Mar, 2012
6 commits
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Provide a common function to initialize a channels cookie values.
Signed-off-by: Russell King
Tested-by: Linus Walleij
Reviewed-by: Linus Walleij
Acked-by: Jassi Brar
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo
Signed-off-by: Vinod Koul -
Now that we have the completed cookie in the dma_chan structure, we
can consolidate the tx_status functions by providing a function to set
the txstate structure and returning the DMA status. We also provide
a separate helper to set the residue for cookies which are still in
progress.Signed-off-by: Russell King
Tested-by: Linus Walleij
Reviewed-by: Linus Walleij
Acked-by: Jassi Brar
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo
Signed-off-by: Vinod Koul -
Provide a common function to do the cookie mechanics for completing
a DMA descriptor.Signed-off-by: Russell King
Tested-by: Linus Walleij
Reviewed-by: Linus Walleij
Acked-by: Jassi Brar
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo
Signed-off-by: Vinod Koul -
Everyone deals with assigning DMA cookies in the same way (it's part of
the API so they should be), so lets consolidate the common code into a
helper function to avoid this duplication.Signed-off-by: Russell King
Tested-by: Linus Walleij
Reviewed-by: Linus Walleij
Acked-by: Jassi Brar
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo
Signed-off-by: Vinod Koul -
Add a local private header file to contain definitions and declarations
which should only be used by DMA engine drivers.We also fix linux/dmaengine.h to use LINUX_DMAENGINE_H to guard against
multiple inclusion.Signed-off-by: Russell King
Tested-by: Linus Walleij
Reviewed-by: Linus Walleij
Acked-by: Jassi Brar
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo
Signed-off-by: Vinod Koul -
Every DMA engine implementation declares a last completed dma cookie
in their private dma channel structures. This is pointless, and
forces driver specific code. Move this out into the common dma_chan
structure.Signed-off-by: Russell King
Tested-by: Linus Walleij
Reviewed-by: Linus Walleij
Acked-by: Jassi Brar
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo
Signed-off-by: Vinod Koul
02 Jan, 2012
1 commit
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Otherwise if a previously physical channel is used as a logical channel, the
LNK may have old values which affect the operation of the logical channel since
the LNK register has different semantics between physical and logical channels.Signed-off-by: Rabin Vincent
Reviewed-by: Jonas ABERG
Signed-off-by: Narayanan G
Acked-by: Linus Walleij
Signed-off-by: Vinod Koul
05 Dec, 2011
1 commit
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Allow logical channels to specify the physical channel they want to use.
This is needed to avoid two peripherals operating on the same physical
channel during some special use-cases. (like mmc and usb during a
usb mass storage case).Signed-off-by: Rabin Vincent
Signed-off-by: Narayanan G
Reviewed-by: Linus Walleij
Signed-off-by: Vinod Koul
28 Nov, 2011
1 commit
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This patch provides an option of having the lcla (link address)
in ESRAM instead of allocating it. The bool value (use_esram_lcla)
in the stedma40_platform_data if set to true, then the lcla
address would be taken from platform resources. Also, the
corresponding esram regulator is managed in the
suspend/resume functions.Signed-off-by: Narayanan G
Signed-off-by: Vinod Koul
22 Nov, 2011
1 commit
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This patch adds power management support to the dma40
driver. The DMA registers are backed up and restored,
during suspend/resume. Also flags to track the dma usage
have been introduced to facilitate this. Patch also includes
few other minor changes, related to formatting, comments.Signed-off-by: Narayanan G
Acked-by: Linus Walleij
Signed-off-by: Vinod Koul
17 Nov, 2011
1 commit
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resolved conflicts:
drivers/media/video/mx3_camera.c
01 Nov, 2011
1 commit
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Signed-off-by: Paul Gortmaker
27 Oct, 2011
1 commit
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fixup usage of dma direction by introducing dma_transfer_direction,
this patch moves dma/drivers/* to use new enumCc: Jassi Brar
Cc: Russell King
Cc: Viresh Kumar
Cc: Linus Walleij
Cc: Nicolas Ferre
Cc: Mika Westerberg
Cc: H Hartley Sweeten
Cc: Li Yang
Cc: Zhang Wei
Cc: Sascha Hauer
Cc: Guennadi Liakhovetski
Cc: Shawn Guo
Cc: Yong Wang
Cc: Tomoya MORINAGA
Cc: Boojin Kim
Cc: Barry Song
Acked-by: Mika Westerberg
Acked-by: Linus Walleij
Acked-by: Viresh Kumar
Acked-by: Nicolas Ferre
Signed-off-by: Vinod Koul
05 Sep, 2011
2 commits
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Prepared descriptors that are not submitted will not be freed. Add
prepared descriptor to a list to be able to release them upon
dmaengine_terminate_all().Signed-off-by: Per Forlin
Acked-by: Linus Walleij
Signed-off-by: Vinod Koul -
The client list may exist in two lists at the same time. This makes free
fail since the same desc is freed multiple times. Remove desc from
client list when adding it to the pending queue. Move free of client owned
descriptors from free_dma() to terminate_all().Unable to handle kernel paging request at virtual address 00100104
pgd = dea8c000
[00100104] *pgd=1ea62831, *pte=00000000, *ppte=00000000
Internal error: Oops: 817 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 Not tainted (3.1.0-rc3+ #58)
PC is at d40_free_chan_resources+0x64/0x330Signed-off-by: Per Forlin
Acked-by: Linus Walleij
Signed-off-by: Vinod Koul
