the DMA_SUCCESS is a misnomer as dmaengine indicates the transfer is complete and
gives no guarantee of the transfer success. Hence we should use DMA_COMPLTE
instead of DMA_SUCCESS
Acked-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Some pl330 have per channel irq and it is necessary
to allocate all of them. Loop over irq assigned for this
device to support these pl330 IPs.
For example this IP is available on Xilinx Zynq platform.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Tested-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This patch proposes to remove the use of the IRQF_DISABLED flag
It's a NOOP since 2.6.35 and it will be removed one day.
Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This patch proposes to remove the use of the IRQF_DISABLED flag
It's a NOOP since 2.6.35 and it will be removed one day.
Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This patch adds support for suspend/resume functionality to the cppi41
DMA driver. The steps necessary to make the system resume properly were
figured out by trial-and-error. The code as it stands now is the
minimum that has to be done to put the musb host system on an AM33xx
system into an operable state after resume.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dst_addr_width and src_addr_width should be a power of 2. Currently the
driver checks, that they both lie between 1 and 8 and that they are equal
to 1 or even. This however leaves an invalid value of 6 uncaught. Use an
explicit power of 2 check instead.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
[typo fix on changelog]
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Makes the code more readable and compact. No functional change.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Instead of passing around struct plafform_device, use struct device and
save one level of dereferencing. This affects the following functions:
* cppi41_add_chans
* purge_descs
* deinit_cpii41
* init_descs
* init_cppi41
* cppi_glue_infos
It's just a cosmetic cleanup that makes the code more readable.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
tegra_dma_prep_dma_cyclic is referenced only in this file.
Make it static.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
We need to free the ld_active list head before jumping into the callback
routine. Otherwise the callback could run into issue_pending and change
our ld_active list head we just going to free. This will run the channel
list into an currupted and undefined state.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The TI_EDMA driver unconditionally calls functions provided by the
TI_PRIV_EDMA code, but it doesn't force that to be built-in. If that isn't
otherwise enabled somewhere, you can get build errors like:
linux-3.12.0-0.rc0.git1.1.fc21.armv7hl/drivers/dma/edma.c:593: undefined reference to `edma_free_slot'
drivers/built-in.o: In function `edma_terminate_all':
linux-3.12.0-0.rc0.git1.1.fc21.armv7hl/drivers/dma/edma.c:169: undefined reference to `edma_stop'
drivers/built-in.o: In function `edma_execute':
linux-3.12.0-0.rc0.git1.1.fc21.armv7hl/drivers/dma/edma.c:122: undefined reference to `edma_write_slot'
linux-3.12.0-0.rc0.git1.1.fc21.armv7hl/drivers/dma/edma.c:149: undefined reference to `edma_link'
linux-3.12.0-0.rc0.git1.1.fc21.armv7hl/drivers/dma/edma.c:152: undefined reference to `edma_start'
Make TI_EDMA select TI_PRIV_EDMA to avoid this.
Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Acked-by: Matt Porter <matt.porter@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Matt's @ti.com address bounces. Update the MODULE_AUTHOR information in
edma.c to his Linaro address.
Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Acked-by: Matt Porter <matt.porter@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
After the last architecture switched to generic hard irqs the config
options HAVE_GENERIC_HARDIRQS & GENERIC_HARDIRQS and the related code
for !CONFIG_GENERIC_HARDIRQS can be removed.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Pull slave-dmaengine updates from Vinod Koul:
"This pull brings:
- Andy's DW driver updates
- Guennadi's sh driver updates
- Pl08x driver fixes from Tomasz & Alban
- Improvements to mmp_pdma by Daniel
- TI EDMA fixes by Joel
- New drivers:
- Hisilicon k3dma driver
- Renesas rcar dma driver
- New API for publishing slave driver capablities
- Various fixes across the subsystem by Andy, Jingoo, Sachin etc..."
* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (94 commits)
dma: edma: Remove limits on number of slots
dma: edma: Leave linked to Null slot instead of DUMMY slot
dma: edma: Find missed events and issue them
ARM: edma: Add function to manually trigger an EDMA channel
dma: edma: Write out and handle MAX_NR_SG at a given time
dma: edma: Setup parameters to DMA MAX_NR_SG at a time
dmaengine: pl330: use dma_set_max_seg_size to set the sg limit
dmaengine: dma_slave_caps: remove sg entries
dma: replace devm_request_and_ioremap by devm_ioremap_resource
dma: ste_dma40: Fix potential null pointer dereference
dma: ste_dma40: Remove duplicate const
dma: imx-dma: Remove redundant NULL check
dma: dmagengine: fix function names in comments
dma: add driver for R-Car HPB-DMAC
dma: k3dma: use devm_ioremap_resource() instead of devm_request_and_ioremap()
dma: imx-sdma: Staticize sdma_driver_data structures
pch_dma: Add MODULE_DEVICE_TABLE
dmaengine: PL08x: Add cyclic transfer support
dmaengine: PL08x: Fix reading the byte count in cctl
dmaengine: PL08x: Add support for different maximum transfer size
...
Collection of random updates to the core and some end-driver fixups for
ioatdma and mv_xor:
* NUMA aware channel allocation
* Cleanup dmatest debugfs interface
* ioat: make raid-support Atom only
* mv_xor: big endian
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Merge tag 'dmaengine-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine
Pull dmaengine update from Dan Williams:
"Collection of random updates to the core and some end-driver fixups
for ioatdma and mv_xor:
- NUMA aware channel allocation
- Cleanup dmatest debugfs interface
- ioat: make raid-support Atom only
- mv_xor: big endian
Aside from the top three commits these have all had some soak time in
-next. The top commit fixes a recent build breakage.
It has been a long while since my last pull request, hopefully it does
not show. Thanks to Vinod for keeping an eye on drivers/dma/ this
past year"
* tag 'dmaengine-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine:
dmaengine: dma_sync_wait and dma_find_channel undefined
MAINTAINERS: update email for Dan Williams
dma: mv_xor: Fix incorrect error path
ioatdma: silence GCC warnings
dmaengine: make dma_channel_rebalance() NUMA aware
dmaengine: make dma_submit_error() return an error code
ioatdma: disable RAID on non-Atom platforms and reenable unaligned copies
mv_xor: support big endian systems using descriptor swap feature
mv_xor: use {readl, writel}_relaxed instead of __raw_{readl, writel}
dmatest: print message on debug level in case of no error
dmatest: remove IS_ERR_OR_NULL checks of debugfs calls
dmatest: make module parameters writable
These are changes that arrived a little late before the merge window,
or had dependencies on previous branches.
Highlights:
- ux500: misc. cleanup, fixup I2C devices
- exynos: DT updates for RTC; PM updates
- at91: DT updates for NAND; new platforms added to generic defconfig
- sunxi: DT updates: cubieboard2, pinctrl driver, gated clocks
- highbank: LPAE fixes, select necessary ARM errata
- omap: PM fixes and improvements; OMAP5 mailbox support
- omap: basic support for new DRA7xx SoCs
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Merge tag 'late-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC late changes from Kevin Hilman:
"These are changes that arrived a little late before the merge window,
or had dependencies on previous branches.
Highlights:
- ux500: misc. cleanup, fixup I2C devices
- exynos: DT updates for RTC; PM updates
- at91: DT updates for NAND; new platforms added to generic defconfig
- sunxi: DT updates: cubieboard2, pinctrl driver, gated clocks
- highbank: LPAE fixes, select necessary ARM errata
- omap: PM fixes and improvements; OMAP5 mailbox support
- omap: basic support for new DRA7xx SoCs"
* tag 'late-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (60 commits)
ARM: dts: vexpress: Add CCI node to TC2 device-tree
ARM: EXYNOS: Skip C1 cpuidle state for exynos5440
ARM: EXYNOS: always enable PM domains support for EXYNOS4X12
ARM: highbank: clean-up some unused includes
ARM: sun7i: Enable the A20 clocks in the DTSI
ARM: sun6i: Enable clock support in the DTSI
ARM: sun5i: dt: Use the A10s gates in the DTSI
ARM: at91: at91_dt_defconfig: enable rm9200 support
ARM: dts: add ADC device tree node for exynos5420/5250
ARM: dts: Add RTC DT node to Exynos5420 SoC
ARM: dts: Update the "status" property of RTC DT node for Exynos5250 SoC
ARM: dts: Fix the RTC DT node name for Exynos5250
irqchip: mmp: avoid to include irqs head file
ARM: mmp: avoid to include head file in mach-mmp
irqchip: mmp: support irqchip
irqchip: move mmp irq driver
ARM: OMAP: AM33xx: clock: Add RNG clock data
ARM: OMAP: TI81XX: add always-on powerdomain for TI81XX
ARM: OMAP4: clock: Lock PLLs in the right sequence
ARM: OMAP: AM33XX: hwmod: Add hwmod data for debugSS
...
Return directly if memory allocation fails. There is no need
of dma_free_coherent().
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Saeed Bishara <saeed@marvell.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Pull vfs pile 1 from Al Viro:
"Unfortunately, this merge window it'll have a be a lot of small piles -
my fault, actually, for not keeping #for-next in anything that would
resemble a sane shape ;-/
This pile: assorted fixes (the first 3 are -stable fodder, IMO) and
cleanups + %pd/%pD formats (dentry/file pathname, up to 4 last
components) + several long-standing patches from various folks.
There definitely will be a lot more (starting with Miklos'
check_submount_and_drop() series)"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (26 commits)
direct-io: Handle O_(D)SYNC AIO
direct-io: Implement generic deferred AIO completions
add formats for dentry/file pathnames
kvm eventfd: switch to fdget
powerpc kvm: use fdget
switch fchmod() to fdget
switch epoll_ctl() to fdget
switch copy_module_from_fd() to fdget
git simplify nilfs check for busy subtree
ibmasmfs: don't bother passing superblock when not needed
don't pass superblock to hypfs_{mkdir,create*}
don't pass superblock to hypfs_diag_create_files
don't pass superblock to hypfs_vm_create_files()
oprofile: get rid of pointless forward declarations of struct super_block
oprofilefs_create_...() do not need superblock argument
oprofilefs_mkdir() doesn't need superblock argument
don't bother with passing superblock to oprofile_create_stats_files()
oprofile: don't bother with passing superblock to ->create_files()
don't bother passing sb to oprofile_create_files()
coh901318: don't open-code simple_read_from_buffer()
...
With this series, this check is no longer required and
we shouldn't need to reject drivers DMA'ing more than the
MAX number of slots.
Signed-off-by: Joel Fernandes <joelf@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Dummy slot has been used as a way for missed-events not to be
reported as missing. This has been particularly troublesome for cases
where we might want to temporarily pause all incoming events.
For EDMA DMAC, there is no way to do any such pausing of events as
the occurence of the "next" event is not software controlled.
Using "edma_pause" in IRQ handlers doesn't help as by then the event
in concern from the slave is already missed.
Linking a dummy slot, is seen to absorb these events which we didn't
want to miss. So we don't link to dummy, but instead leave it linked
to NULL set, allow an error condition and detect the channel that
missed it.
Consider the case where we have a scatter-list like:
SG1->SG2->SG3->SG4->SG5->SG6->Null
For ex, for a MAX_NR_SG of 2, earlier we were splitting this as:
SG1->SG2->Null
SG3->SG4->Null
SG5->SG6->Null
Now we split it as
SG1->SG2->Null
SG3->SG4->Null
SG5->SG6->Dummy
This approach results in lesser unwanted interrupts that occur
for the last list split. The Dummy slot has the property of not
raising an error condition if events are missed unlike the Null
slot. We are OK with this as we're done with processing the
whole list once we reach Dummy.
Signed-off-by: Joel Fernandes <joelf@ti.com>
[modifed duplicate s-o-b & patch title]
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
In an effort to move to using Scatter gather lists of any size with
EDMA as discussed at [1] instead of placing limitations on the driver,
we work through the limitations of the EDMAC hardware to find missed
events and issue them.
The sequence of events that require this are:
For the scenario where MAX slots for an EDMA channel is 3:
SG1 -> SG2 -> SG3 -> SG4 -> SG5 -> SG6 -> Null
The above SG list will have to be DMA'd in 2 sets:
(1) SG1 -> SG2 -> SG3 -> Null
(2) SG4 -> SG5 -> SG6 -> Null
After (1) is succesfully transferred, the events from the MMC controller
donot stop coming and are missed by the time we have setup the transfer
for (2). So here, we catch the events missed as an error condition and
issue them manually.
In the second part of the patch, we make handle the NULL slot cases:
For crypto IP, we continue to receive events even continuously in
NULL slot, the setup of the next set of SG elements happens after
the error handler executes. This is results in some recursion problems.
Due to this, we continously receive error interrupts when we manually
trigger an event from the error handler.
We fix this, by first detecting if the Channel is currently transferring
from a NULL slot or not, that's where the edma_read_slot in the error
callback from interrupt handler comes in. With this we can determine if
the set up of the next SG list has completed, and we manually trigger
only in this case. If the setup has _not_ completed, we are still in NULL
so we just set a missed flag and allow the manual triggerring to happen
in edma_execute which will be eventually called. This fixes the above
mentioned race conditions seen with the crypto drivers.
[1] http://marc.info/?l=linux-omap&m=137416733628831&w=2
Signed-off-by: Joel Fernandes <joelf@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Process SG-elements in batches of MAX_NR_SG if they are greater
than MAX_NR_SG. Due to this, at any given time only those many
slots will be used in the given channel no matter how long the
scatter list is. We keep track of how much has been written
inorder to process the next batch of elements in the scatter-list
and detect completion.
For such intermediate transfer completions (one batch of MAX_NR_SG),
make use of pause and resume functions instead of start and stop
when such intermediate transfer is in progress or completed as we
donot want to clear any pending events.
Signed-off-by: Joel Fernandes <joelf@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Changes are made here for configuring existing parameters to support
DMA'ing them out in batches as needed.
Also allocate as many as slots as needed by the SG list, but not more
than MAX_NR_SG. Then these slots will be reused accordingly.
For ex, if MAX_NR_SG=10, and number of SG entries is 40, still only
10 slots will be allocated to DMA the entire SG list of size 40.
Also enable TC interrupts for slots that are a last in a current
iteration, or that fall on a MAX_NR_SG boundary.
Signed-off-by: Joel Fernandes <joelf@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Here's the big driver core pull request for 3.12-rc1.
Lots of tiny changes here fixing up the way sysfs attributes are
created, to try to make drivers simpler, and fix a whole class race
conditions with creations of device attributes after the device was
announced to userspace.
All the various pieces are acked by the different subsystem maintainers.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core patches from Greg KH:
"Here's the big driver core pull request for 3.12-rc1.
Lots of tiny changes here fixing up the way sysfs attributes are
created, to try to make drivers simpler, and fix a whole class race
conditions with creations of device attributes after the device was
announced to userspace.
All the various pieces are acked by the different subsystem
maintainers"
* tag 'driver-core-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (119 commits)
firmware loader: fix pending_fw_head list corruption
drivers/base/memory.c: introduce help macro to_memory_block
dynamic debug: line queries failing due to uninitialized local variable
sysfs: sysfs_create_groups returns a value.
debugfs: provide debugfs_create_x64() when disabled
rbd: convert bus code to use bus_groups
firmware: dcdbas: use binary attribute groups
sysfs: add sysfs_create/remove_groups for when SYSFS is not enabled
driver core: add #include <linux/sysfs.h> to core files.
HID: convert bus code to use dev_groups
Input: serio: convert bus code to use drv_groups
Input: gameport: convert bus code to use drv_groups
driver core: firmware: use __ATTR_RW()
driver core: core: use DEVICE_ATTR_RO
driver core: bus: use DRIVER_ATTR_WO()
driver core: create write-only attribute macros for devices and drivers
sysfs: create __ATTR_WO()
driver-core: platform: convert bus code to use dev_groups
workqueue: convert bus code to use dev_groups
MEI: convert bus code to use dev_groups
...
Here's the big USB driver pull request for 3.12-rc1
Lots of USB driver fixes and updates. Nothing major, just the normal
xhci, gadget, and other driver changes. Full details in the shortlog.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB patches from Greg KH:
"Here's the big USB driver pull request for 3.12-rc1
Lots of USB driver fixes and updates. Nothing major, just the normal
xhci, gadget, and other driver changes. Full details in the shortlog"
* tag 'usb-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (352 commits)
usbcore: fix incorrect type in assignment in descriptors_changed()
usbcore: compare and release one bos descriptor in usb_reset_and_verify_device()
ehci: remove debugging statement with ehci statistics in ehci_stop()
ehci: remove duplicate debug_async_open() prototype in ehci-dbg.c
ehci: enable debugging code when CONFIG_DYNAMIC_DEBUG is set
ehci: remove ehci_vdbg() verbose debugging statements
Documentation sysfs-bus-usb: Document which files are used by libusb
Documentation sysfs-bus-usb: Document the speed file used by libusb
Documentation sysfs-bus-usb: Move files with known users to stable
USB: fix build error when CONFIG_PM_SLEEP isn't enabled
usb: r8a66597-hcd: use platform_{get,set}_drvdata()
usb: phy-tegra-usb: use platform_{get,set}_drvdata()
usb: acm gadget: Null termintate strings table
dma: cppi41: off by one in desc_to_chan()
xhci: Fix warning introduced by disabling runtime PM.
dev-core: fix build break when DEBUG is enabled
USB: OHCI: Allow runtime PM without system sleep
usb: ohci-at91: remove unnecessary dev_set_drvdata()
usb: renesas_usbhs: use platform_{get,set}_drvdata()
usb: fotg210-udc: use platform_{get,set}_drvdata()
...
Pull slave-dma fix from Vinod Koul:
"A fix for resolving TI_EDMA driver's build error in allmodconfig to
have filter function built in""
* 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
dma/Kconfig: TI_EDMA needs to be boolean
Vinod Koul