Commit Graph

116 Commits

Author SHA1 Message Date
Linus Torvalds f2c73464d7 Merge tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC cleanups from Olof Johansson:
 "This is the branch where we usually queue up cleanup efforts, moving
  drivers out of the architecture directory, header file restructuring,
  etc.  Sometimes they tangle with new development so it's hard to keep
  it strictly to cleanups.

  Some of the things included in this branch are:

   * Atmel SAMA5 conversion to common clock
   * Reset framework conversion for tegra platforms
    - Some of this depends on tegra clock driver reworks that are shared
      with Mike Turquette's clk tree.
   * Tegra DMA refactoring, which are shared branches with the DMA tree.
   * Removal of some header files on exynos to prepare for
     multiplatform"

* tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (169 commits)
  ARM: mvebu: move Armada 370/XP specific definitions to armada-370-xp.h
  ARM: mvebu: remove prototypes of non-existing functions from common.h
  ARM: mvebu: move ARMADA_XP_MAX_CPUS to armada-370-xp.h
  serial: sh-sci: Rework baud rate calculation
  serial: sh-sci: Compute overrun_bit without using baud rate algo
  serial: sh-sci: Remove unused GPIO request code
  serial: sh-sci: Move overrun_bit and error_mask fields out of pdata
  serial: sh-sci: Support resources passed through platform resources
  serial: sh-sci: Don't check IRQ in verify port operation
  serial: sh-sci: Set the UPF_FIXED_PORT flag
  serial: sh-sci: Remove duplicate interrupt check in verify port op
  serial: sh-sci: Simplify baud rate calculation algorithms
  serial: sh-sci: Remove baud rate calculation algorithm 5
  serial: sh-sci: Sort headers alphabetically
  ARM: EXYNOS: Kill exynos_pm_late_initcall()
  ARM: EXYNOS: Consolidate selection of PM_GENERIC_DOMAINS for Exynos4
  ARM: at91: switch Calao QIL-A9260 board to DT
  clk: at91: fix pmc_clk_ids data type attriubte
  PM / devfreq: use inclusion <mach/map.h> instead of <plat/map-s5p.h>
  ARM: EXYNOS: remove <mach/regs-clock.h> for exynos
  ...
2014-01-23 18:36:55 -08:00
Dan Williams 7787380336 net_dma: mark broken
net_dma can cause data to be copied to a stale mapping if a
copy-on-write fault occurs during dma.  The application sees missing
data.

The following trace is triggered by modifying the kernel to WARN if it
ever triggers copy-on-write on a page that is undergoing dma:

 WARNING: CPU: 24 PID: 2529 at lib/dma-debug.c:485 debug_dma_assert_idle+0xd2/0x120()
 ioatdma 0000:00:04.0: DMA-API: cpu touching an active dma mapped page [pfn=0x16bcd9]
 Modules linked in: iTCO_wdt iTCO_vendor_support ioatdma lpc_ich pcspkr dca
 CPU: 24 PID: 2529 Comm: linbug Tainted: G        W    3.13.0-rc1+ #353
  00000000000001e5 ffff88016f45f688 ffffffff81751041 ffff88017ab0ef70
  ffff88016f45f6d8 ffff88016f45f6c8 ffffffff8104ed9c ffffffff810f3646
  ffff8801768f4840 0000000000000282 ffff88016f6cca10 00007fa2bb699349
 Call Trace:
  [<ffffffff81751041>] dump_stack+0x46/0x58
  [<ffffffff8104ed9c>] warn_slowpath_common+0x8c/0xc0
  [<ffffffff810f3646>] ? ftrace_pid_func+0x26/0x30
  [<ffffffff8104ee86>] warn_slowpath_fmt+0x46/0x50
  [<ffffffff8139c062>] debug_dma_assert_idle+0xd2/0x120
  [<ffffffff81154a40>] do_wp_page+0xd0/0x790
  [<ffffffff811582ac>] handle_mm_fault+0x51c/0xde0
  [<ffffffff813830b9>] ? copy_user_enhanced_fast_string+0x9/0x20
  [<ffffffff8175fc2c>] __do_page_fault+0x19c/0x530
  [<ffffffff8175c196>] ? _raw_spin_lock_bh+0x16/0x40
  [<ffffffff810f3539>] ? trace_clock_local+0x9/0x10
  [<ffffffff810fa1f4>] ? rb_reserve_next_event+0x64/0x310
  [<ffffffffa0014c00>] ? ioat2_dma_prep_memcpy_lock+0x60/0x130 [ioatdma]
  [<ffffffff8175ffce>] do_page_fault+0xe/0x10
  [<ffffffff8175c862>] page_fault+0x22/0x30
  [<ffffffff81643991>] ? __kfree_skb+0x51/0xd0
  [<ffffffff813830b9>] ? copy_user_enhanced_fast_string+0x9/0x20
  [<ffffffff81388ea2>] ? memcpy_toiovec+0x52/0xa0
  [<ffffffff8164770f>] skb_copy_datagram_iovec+0x5f/0x2a0
  [<ffffffff8169d0f4>] tcp_rcv_established+0x674/0x7f0
  [<ffffffff816a68c5>] tcp_v4_do_rcv+0x2e5/0x4a0
  [..]
 ---[ end trace e30e3b01191b7617 ]---
 Mapped at:
  [<ffffffff8139c169>] debug_dma_map_page+0xb9/0x160
  [<ffffffff8142bf47>] dma_async_memcpy_pg_to_pg+0x127/0x210
  [<ffffffff8142cce9>] dma_memcpy_pg_to_iovec+0x119/0x1f0
  [<ffffffff81669d3c>] dma_skb_copy_datagram_iovec+0x11c/0x2b0
  [<ffffffff8169d1ca>] tcp_rcv_established+0x74a/0x7f0:

...the problem is that the receive path falls back to cpu-copy in
several locations and this trace is just one of the areas.  A few
options were considered to fix this:

1/ sync all dma whenever a cpu copy branch is taken

2/ modify the page fault handler to hold off while dma is in-flight

Option 1 adds yet more cpu overhead to an "offload" that struggles to compete
with cpu-copy.  Option 2 adds checks for behavior that is already documented as
broken when using get_user_pages().  At a minimum a debug mode is warranted to
catch and flag these violations of the dma-api vs get_user_pages().

Thanks to David for his reproducer.

Cc: <stable@vger.kernel.org>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Alexander Duyck <alexander.h.duyck@intel.com>
Reported-by: David Whipple <whipple@securedatainnovations.ch>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2013-12-18 12:53:43 -08:00
Dan Williams 3cc377b9ae dmaengine: fix enable for high order unmap pools
The higher order mempools support raid operations, and we want to
disable them when raid support is not enabled.  Making them conditional
on ASYNC_TX_DMA is not sufficient as other users (specifically dmatest)
will also issue raid operations.  Make raid drivers explicitly request
that the core carry the higher order pools.

Reported-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2013-12-12 22:43:42 -08:00
Qiao Zhou b9f10a10cd ARM: mmp: build sram driver alone
sram driver can be used by many chips besides CPU_MMP2, and so build
it alone. Also need to select MMP_SRAM for MMP_TDMA driver.

Reported-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Qiao Zhou <zhouqiao@marvell.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
2013-12-11 17:33:02 -08:00
Linus Torvalds e6d69a60b7 Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma
Pull slave-dmaengine changes from Vinod Koul:
 "This brings for slave dmaengine:

   - Change dma notification flag to DMA_COMPLETE from DMA_SUCCESS as
     dmaengine can only transfer and not verify validaty of dma
     transfers

   - Bunch of fixes across drivers:

      - cppi41 driver fixes from Daniel

      - 8 channel freescale dma engine support and updated bindings from
        Hongbo

      - msx-dma fixes and cleanup by Markus

   - DMAengine updates from Dan:

      - Bartlomiej and Dan finalized a rework of the dma address unmap
        implementation.

      - In the course of testing 1/ a collection of enhancements to
        dmatest fell out.  Notably basic performance statistics, and
        fixed / enhanced test control through new module parameters
        'run', 'wait', 'noverify', and 'verbose'.  Thanks to Andriy and
        Linus [Walleij] for their review.

      - Testing the raid related corner cases of 1/ triggered bugs in
        the recently added 16-source operation support in the ioatdma
        driver.

      - Some minor fixes / cleanups to mv_xor and ioatdma"

* 'next' of git://git.infradead.org/users/vkoul/slave-dma: (99 commits)
  dma: mv_xor: Fix mis-usage of mmio 'base' and 'high_base' registers
  dma: mv_xor: Remove unneeded NULL address check
  ioat: fix ioat3_irq_reinit
  ioat: kill msix_single_vector support
  raid6test: add new corner case for ioatdma driver
  ioatdma: clean up sed pool kmem_cache
  ioatdma: fix selection of 16 vs 8 source path
  ioatdma: fix sed pool selection
  ioatdma: Fix bug in selftest after removal of DMA_MEMSET.
  dmatest: verbose mode
  dmatest: convert to dmaengine_unmap_data
  dmatest: add a 'wait' parameter
  dmatest: add basic performance metrics
  dmatest: add support for skipping verification and random data setup
  dmatest: use pseudo random numbers
  dmatest: support xor-only, or pq-only channels in tests
  dmatest: restore ability to start test at module load and init
  dmatest: cleanup redundant "dmatest: " prefixes
  dmatest: replace stored results mechanism, with uniform messages
  Revert "dmatest: append verify result to results"
  ...
2013-11-20 13:20:24 -08:00
Linus Torvalds 9073e1a804 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial tree updates from Jiri Kosina:
 "Usual earth-shaking, news-breaking, rocket science pile from
  trivial.git"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (23 commits)
  doc: usb: Fix typo in Documentation/usb/gadget_configs.txt
  doc: add missing files to timers/00-INDEX
  timekeeping: Fix some trivial typos in comments
  mm: Fix some trivial typos in comments
  irq: Fix some trivial typos in comments
  NUMA: fix typos in Kconfig help text
  mm: update 00-INDEX
  doc: Documentation/DMA-attributes.txt fix typo
  DRM: comment: `halve' -> `half'
  Docs: Kconfig: `devlopers' -> `developers'
  doc: typo on word accounting in kprobes.c in mutliple architectures
  treewide: fix "usefull" typo
  treewide: fix "distingush" typo
  mm/Kconfig: Grammar s/an/a/
  kexec: Typo s/the/then/
  Documentation/kvm: Update cpuid documentation for steal time and pv eoi
  treewide: Fix common typo in "identify"
  __page_to_pfn: Fix typo in comment
  Correct some typos for word frequency
  clk: fixed-factor: Fix a trivial typo
  ...
2013-11-15 16:47:22 -08:00
Hongbo Zhang 8de7a7d950 DMA: Freescale: update driver to support 8-channel DMA engine
This patch adds support to 8-channel DMA engine, thus the driver works for both
the new 8-channel and the legacy 4-channel DMA engines.

Signed-off-by: Hongbo Zhang <hongbo.zhang@freescale.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-13 14:26:27 +05:30
Linus Torvalds 53575aa99d Merge tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM driver updates from Olof Johansson:
 "Updates of SoC-near drivers and other driver updates that makes more
  sense to take through our tree.  In this case it's involved:

   - Some Davinci driver updates that has required corresponding
     platform code changes (gpio mostly)
   - CCI bindings and a few driver updates
   - Marvell mvebu patches for PCI MSI support (could have gone through
     the PCI tree for this release, but they were acked by Bjorn for
     3.12 so we kept them through arm-soc).
   - Marvell dove switch-over to DT-based PCIe configuration
   - Misc updates for Samsung platform dmaengine drivers"

* tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (32 commits)
  ARM: S3C24XX: add dma pdata for s3c2410, s3c2440 and s3c2442
  dmaengine: s3c24xx-dma: add support for the s3c2410 type of controller
  ARM: S3C24XX: Fix possible dma selection warning
  PCI: mvebu: make local functions static
  PCI: mvebu: add I/O access wrappers
  PCI: mvebu: Dynamically detect if the PEX link is up to enable hot plug
  ARM: mvebu: fix gated clock documentation
  ARM: dove: remove legacy pcie and clock init
  ARM: dove: switch to DT probed mbus address windows
  ARM: SAMSUNG: set s3c24xx_dma_filter for s3c64xx-spi0 device
  ARM: S3C24XX: add platform-devices for new dma driver for s3c2412 and s3c2443
  dmaengine: add driver for Samsung s3c24xx SoCs
  ARM: S3C24XX: number the dma clocks
  PCI: mvebu: add support for Marvell Dove SoCs
  PCI: mvebu: add support for reset on GPIO
  PCI: mvebu: remove subsys_initcall
  PCI: mvebu: increment nports only for registered ports
  PCI: mvebu: move clock enable before register access
  PCI: mvebu: add support for MSI
  irqchip: armada-370-xp: implement MSI support
  ...
2013-11-11 17:05:37 +09:00
Masanari Iida 8c88126bbb treewide: Fix typo in Kconfig
Correct spelling typo in Kconfig.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-10-14 15:23:02 +02:00
Santosh Shilimkar e7ed8b40e4 dma: Allow TI_EDMA selectable for ARCH_KEYSTONE
Allow the TI_EDMA to be built for ARCH_KEYSTONE which also supports
the EDMA IP.

Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2013-10-10 19:52:18 -04:00
Heiko Stuebner ddeccb8d6b dmaengine: add driver for Samsung s3c24xx SoCs
This adds a new driver to support the s3c24xx dma using the dmaengine
and makes the old one in mach-s3c24xx obsolete in the long run.

Conceptually the s3c24xx-dma feels like a distant relative of the pl08x
with numerous virtual channels being mapped to a lot less physical ones.
The driver therefore borrows a lot from the amba-pl08x driver in this
regard. Functionality-wise the driver gains a memcpy ability in addition
to the slave_sg one.

The driver supports both the method for requesting the peripheral used
by SoCs before the S3C2443 and the different method for S3C2443 and later.

On earlier SoCs the hardware channels usable for specific peripherals is
constrainted while on later SoCs all channels can be used for any peripheral.

Tested on a s3c2416-based board, memcpy using the dmatest module and
slave_sg partially using the spi-s3c64xx driver.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2013-10-08 06:42:10 +09:00
Josh Boyer c2b9e974e6 dma/Kconfig: Make TI_EDMA select TI_PRIV_EDMA
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>
2013-09-17 10:26:22 +05:30
Linus Torvalds ec5b103ecf Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
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
  ...
2013-09-10 13:37:36 -07:00
Linus Torvalds b3b49114c8 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()
  ...
2013-09-03 11:35:32 -07:00
Zhangfei Gao 8e6152bc66 dmaengine: Add hisilicon k3 DMA engine driver
Add dmaengine driver for hisilicon k3 platform based on virt_dma

Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Tested-by: Kai Yang <jean.yangkai@huawei.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-08-28 11:23:40 +05:30
Guenter Roeck 764480413b dma/Kconfig: TI_EDMA needs to be boolean
Fix:

arch/arm/common/built-in.o: undefined reference to `edma_filter_fn'

seen with "make ARCH=arm allmodconfig"

Commit 6cba4355 (ARM: edma: Add DT and runtime PM support to the private EDMA
API) adds a dependency on edma_filter_fn() into arch/arm/common/edma.c. Since
this file is always built into the kernel, edma_filter_fn() must be built into
the kernel as well.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-08-25 16:13:19 +05:30
Sebastian Andrzej Siewior 9b3452d1fa usb: musb dma: add cppi41 dma driver
This driver is currently used by musb' cppi41 couter part. I may merge
both dma engine user of musb at some point but not just yet.

The driver seems to work in RX/TX mode in host mode, tested on mass
storage. I increaed the size of the TX / RX transfers and waited for the
core code to cancel a transfers and it seems to recover.

v2..3:
- use mall transfers on RX side and check data toggle.
- use rndis mode on tx side so we haveon interrupt for 4096 transfers.
- remove custom "transferred" hack and use dmaengine_tx_status() to
  compute the total amount of data that has been transferred.
- cancel transfers and reclaim descriptors

v1..v2:
- RX path added
- dma mode 0 & 1 is working
- device tree nodes re-created.

Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Dan Williams <djbw@fb.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-08-09 17:40:16 +03:00
Linus Torvalds d2b4a64671 Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
Pull slave-dmaengine updates from Vinod Koul:
 "Once you have some time from extended weekend celebrations please
  consider pulling the following to get:
   - Various fixes and PCI driver for dw_dmac by Andy
   - DT binding for imx-dma by Markus & imx-sdma by Shawn
   - DT fixes for dmaengine by Lars
   - jz4740 dmac driver by Lars
   - and various fixes across the drivers"

What "extended weekend celebrations"?  I'm in the merge window, who has
time for extended celebrations..

* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (40 commits)
  DMA: shdma: add DT support
  DMA: shdma: shdma_chan_filter() has to be in shdma-base.h
  DMA: shdma: (cosmetic) don't re-calculate a pointer
  dmaengine: at_hdmac: prepare clk before calling enable
  dmaengine/trivial: at_hdmac: add curly brackets to if/else expressions
  dmaengine: at_hdmac: remove unsuded atc_cleanup_descriptors()
  dmaengine: at_hdmac: add FIFO configuration parameter to DMA DT binding
  ARM: at91: dt: add header to define at_hdmac configuration
  MIPS: jz4740: Correct clock gate bit for DMA controller
  MIPS: jz4740: Remove custom DMA API
  MIPS: jz4740: Register jz4740 DMA device
  dma: Add a jz4740 dmaengine driver
  MIPS: jz4740: Acquire and enable DMA controller clock
  dma: mmp_tdma: disable irq when disabling dma channel
  dmaengine: PL08x: Avoid collisions with get_signal() macro
  dmaengine: dw: select DW_DMAC_BIG_ENDIAN_IO automagically
  dma: dw: add PCI part of the driver
  dma: dw: split driver to library part and platform code
  dma: move dw_dmac driver to an own directory
  dw_dmac: don't check resource with devm_ioremap_resource
  ...
2013-07-07 11:11:43 -07:00
Lars-Peter Clausen 7c169a42d9 dma: Add a jz4740 dmaengine driver
This patch adds dmaengine support for the JZ4740 DMA controller. For now the
driver will be a wrapper around the custom JZ4740 DMA API. Once all users of the
custom JZ4740 DMA API have been converted to the dmaengine API the custom API
will be removed and direct hardware access will be added to the dmaengine
driver.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-07-05 11:40:50 +05:30
Andy Shevchenko 61a7649620 dma: move dw_dmac driver to an own directory
The dw_dmac driver is going to be split into multiple files. To make this more
convenient move it to an own directory.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-07-05 11:40:43 +05:30
Matt Porter e65abbbc52 dmaengine: edma: enable build for AM33XX
Enable TI EDMA option on OMAP and TI_PRIV_EDMA

Signed-off-by: Matt Porter <mporter@ti.com>
Signed-off-by: Joel A Fernandes <joelagnel@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
2013-06-24 15:55:08 +05:30
Shimoda, Yoshihiro 189b4ee8e9 dma: sh: add Kconfig
This patch adds Kconfig in the drivers/dma/sh. This patch also adds
a new config "SH_DMAE_BASE" and the "config SH_DMAE" depends on it.
Since some drivers (e.g. sh_mmcif.c) depends on shdma-base.c if
CONFIG_DMA_ENGINE=y, the "config SH_DMAE_BASE" is set as "bool".

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-04-30 15:50:12 +05:30
Andy Shevchenko 1b2e98bc1e dma: acpi-dma: introduce ACPI DMA helpers
There is a new generic API to get a DMA channel for a slave device (commit
9a6cecc8 "dmaengine: add helper function to request a slave DMA channel"). In
similar fashion to the DT case (commit aa3da644 "of: Add generic device tree
DMA helpers") we introduce helpers to the DMAC drivers which are enumerated by
ACPI.

The proposed extension provides the following API calls:
	acpi_dma_controller_register(), devm_acpi_dma_controller_register()
	acpi_dma_controller_free(), devm_acpi_dma_controller_free()
	acpi_dma_simple_xlate()
	acpi_dma_request_slave_chan_by_index()
	acpi_dma_request_slave_chan_by_name()

The first two should be used, for example, at probe() and remove() of the
corresponding DMAC driver. At the register stage the DMAC driver supplies a
custom xlate() function to translate a struct dma_spec into struct dma_chan.

Accordingly to the ACPI Fixed DMA resource specification the only two pieces of
information the slave device has are the channel id and the request line (slave
id). Those two are represented by struct dma_spec. The
acpi_dma_request_slave_chan_by_index() provides access to the specifix FixedDMA
resource by its index. Whereas dma_request_slave_channel() takes a string
parameter to identify the DMA resources required by the slave device. To make a
slave device driver work with both DeviceTree and ACPI enumeration a simple
convention is established: "tx" corresponds to the index 0 and "rx" to the
index 1. In case of robust configuration the slave device driver unfortunately
needs to call acpi_dma_request_slave_chan_by_index() directly.

Additionally the patch provides "managed" version of the register/free pair
i.e. devm_acpi_dma_controller_register() and devm_acpi_dma_controller_free().
Usually, the driver uses only devm_acpi_dma_controller_register().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-04-15 22:04:10 +05:30
Dave Jiang 3f09ede423 ioatdma: Removing PQ val disable for cb3.3
The PQ Val ops work on the newer hardware so we should actually provide support
for it and remove the disabling bits.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-04-15 09:51:20 +05:30
Heiko Carstens 6c43a51961 drivers/Kconfig: add several missing GENERIC_HARDIRQS dependencies
With this patch an allmodconfig finally builds on s390 again.

Fixes these build errors:

ERROR: "devm_request_threaded_irq" [drivers/spi/spi-altera.ko] undefined!
ERROR: "devm_request_threaded_irq" [drivers/media/platform/sh_veu.ko] undefined!
ERROR: "devm_request_threaded_irq" [drivers/dma/dw_dmac.ko] undefined!

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-03-21 13:35:37 +01:00