linux-stable.git/drivers/dma/ioat, branch linux-4.6.y

Merge tag 'dmaengine-4.6-rc1' of git://git.infradead.org/users/vkoul/slave-dma

2016-03-17T19:34:54+00:00

Pull dmaengine updates from Vinod Koul:
 "This is smallish update with minor changes to core and new driver and
  usual updates.  Nothing super exciting here..

   - We have made slave address as physical to enable driver to do the
     mapping.

   - We now expose the maxburst for slave dma as new capability so
     clients can know this and program accordingly

   - addition of device synchronize callbacks on omap and edma.

   - pl330 updates to support DMAFLUSHP for Rockchip platforms.

   - Updates and improved sg handling in Xilinx VDMA driver.

   - New hidma qualcomm dma driver, though some bits are still in
     progress"

* tag 'dmaengine-4.6-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (40 commits)
  dmaengine: IOATDMA: revise channel reset workaround on CB3.3 platforms
  dmaengine: add Qualcomm Technologies HIDMA channel driver
  dmaengine: add Qualcomm Technologies HIDMA management driver
  dmaengine: hidma: Add Device Tree binding
  dmaengine: qcom_bam_dma: move to qcom directory
  dmaengine: tegra: Move of_device_id table near to its user
  dmaengine: xilinx_vdma: Remove unnecessary variable initializations
  dmaengine: sirf: use __maybe_unused to hide pm functions
  dmaengine: rcar-dmac: clear pertinence number of channels
  dmaengine: sh: shdmac: don't open code of_device_get_match_data()
  dmaengine: tegra: don't open code of_device_get_match_data()
  dmaengine: qcom_bam_dma: Make driver work for BE
  dmaengine: sun4i: support module autoloading
  dma/mic_x100_dma: IS_ERR() vs PTR_ERR() typo
  dmaengine: xilinx_vdma: Use readl_poll_timeout instead of do while loop's
  dmaengine: xilinx_vdma: Simplify spin lock handling
  dmaengine: xilinx_vdma: Fix issues with non-parking mode
  dmaengine: xilinx_vdma: Improve SG engine handling
  dmaengine: pl330: fix to support the burst mode
  dmaengine: make slave address physical
  ...

Merge branch 'topic/ioatdma' into for-linus

2016-03-14T05:47:52+00:00

dmaengine: IOATDMA: revise channel reset workaround on CB3.3 platforms

2016-03-11T02:25:08+00:00

Previously we unloaded the interrupts and reloaded in order to work around
a channel reset bug that cleared the MSIX table. This approach just isn't
practical when a reset needs to happen in the error handler that just
happens to be running in interrupt context (bottom half). It looks like we
can work around the hardware issue by just storing a shadow copy of the
MSIX table and restore it after reset.

Signed-off-by: Dave Jiang 
Signed-off-by: Vinod Koul

dmaengine: IOATDMA: Allocate DMA descriptor ring in contig DMA memory

2016-02-15T17:36:53+00:00

Future IOATDMA hardware will take advantage of descriptors residing in
contiguous memory. Setting the descriptor ring in max config DMA memory
of 2MB. Each channel will need 2 of these chunks. This should provide 64k
of 64B descriptors.

Signed-off-by: Dave Jiang 
Signed-off-by: Vinod Koul

dmaengine: IOATDMA: Removing descriptor ring reshape

2016-02-15T17:36:53+00:00

Moving to contingous memory backed descriptor rings. This makes is really
difficult and complex to do reshape. Going to remove this as I don't think
we need to do it anymore.

Signed-off-by: Dave Jiang 
Signed-off-by: Vinod Koul

dmaengine: IOATDMA: Convert pci_pool_* to dma_pool_*

2016-02-15T17:36:53+00:00

Converting old pci_pool_* calls to "new" dma_pool_* to make everything
uniform.

Signed-off-by: Dave Jiang 
Signed-off-by: Vinod Koul

dmaengine: IOATDMA: fix timer code that continues to restart channels during idle

2016-01-30T16:59:03+00:00

The timer_event() function seems to have a bug where it ends up marking the
last entry as non-responding and eventually attempts to restart the
channel.  This also continuously happen when idle. What needs to happen is
for us to make sure there are no descriptors active and then handle that
case properly.  We should only hit the "cleanup" stage if there are still
active descriptors.

Signed-off-by: Dave Jiang 
Signed-off-by: Vinod Koul

dmaengine: ioatdma: Squelch framesize warnings

2016-01-25T04:19:55+00:00

  CC [M]  drivers/dma/ioat/prep.o
drivers/dma/ioat/prep.c: In function 'ioat_prep_pqxor':
drivers/dma/ioat/prep.c:682:1: warning: the frame size of 1048 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
drivers/dma/ioat/prep.c: In function 'ioat_prep_pqxor_val':
drivers/dma/ioat/prep.c:714:1: warning: the frame size of 1048 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }

gcc version 5.3.1 20151219 (Ubuntu 5.3.1-4ubuntu1)

Cc: Vinod Koul 
Cc: Dan Williams 
Cc: Dave Jiang 
Cc: Prarit Bhargava 
Cc: Nicholas Mc Guire 
Cc: Jarkko Nikula 
Signed-off-by: Tim Gardner 
Signed-off-by: Vinod Koul

dmaengine: ioatdma: constify dca_ops structures

2015-11-16T03:57:32+00:00

The dca_ops structure is never modified, so declare it as const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall 
Acked-by: Dan Williams 
Signed-off-by: Vinod Koul

dmaengine: IOATDMA: Cleanup pre v3.0 chansts register reads

2015-11-16T03:40:46+00:00

Remove pre-3.0 channel status reads. 3.0 and later chansts register
is 64bit and can be read 64bit. This was clarified with the hardware
architects and since the driver now only support 3.0+ we don't need the
legacy support

Signed-off-by: Dave Jiang 
Signed-off-by: Vinod Koul