linux-toradex.git/drivers/dma/ioat, branch v3.11

drivers/dma: remove unused support for MEMSET operations

2013-07-03T23:07:42+00:00

There have never been any real users of MEMSET operations since they
have been introduced in January 2007 by commit 7405f74badf4 ("dmaengine:
refactor dmaengine around dma_async_tx_descriptor").  Therefore remove
support for them for now, it can be always brought back when needed.

[sebastian.hesselbarth@gmail.com: fix drivers/dma/mv_xor]
Signed-off-by: Bartlomiej Zolnierkiewicz 
Signed-off-by: Kyungmin Park 
Signed-off-by: Sebastian Hesselbarth 
Cc: Vinod Koul 
Acked-by: Dan Williams 
Cc: Tomasz Figa 
Cc: Herbert Xu 
Cc: Olof Johansson 
Cc: Kevin Hilman 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma

2013-05-09T16:46:45+00:00

Pull slave-dmaengine updates from Vinod Koul:
 "This time we have dmatest improvements from Andy along with dw_dmac
  fixes.  He has also done support for acpi for dmanegine.

  Also we have bunch of fixes going in DT support for dmanegine for
  various folks.  Then Haswell and other ioat changes from Dave and
  SUDMAC support from Shimoda."

* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (53 commits)
  dma: tegra: implement suspend/resume callbacks
  dma:of: Use a mutex to protect the of_dma_list
  dma: of: Fix of_node reference leak
  dmaengine: sirf: move driver init from module_init to subsys_initcall
  sudmac: add support for SUDMAC
  dma: sh: add Kconfig
  at_hdmac: move to generic DMA binding
  ioatdma: ioat3_alloc_sed can be static
  ioatdma: Adding write back descriptor error status support for ioatdma 3.3
  ioatdma: S1200 platforms ioatdma channel 2 and 3 falsely advertise RAID cap
  ioatdma: Adding support for 16 src PQ ops and super extended descriptors
  ioatdma: Removing hw bug workaround for CB3.x .2 and earlier
  dw_dmac: add ACPI support
  dmaengine: call acpi_dma_request_slave_channel as well
  dma: acpi-dma: introduce ACPI DMA helpers
  dma: of: Remove unnecessary list_empty check
  DMA: OF: Check properties value before running be32_to_cpup() on it
  DMA: of: Constant names
  ioatdma: skip silicon bug workaround for pq_align for cb3.3
  ioatdma: Removing PQ val disable for cb3.3
  ...

ioatdma: ioat3_alloc_sed can be static

2013-04-16T13:19:40+00:00

Reported-by: Fengguang Wu 
Signed-off-by: Fengguang Wu 
Acked-by: Dave Jiang 
Signed-off-by: Vinod Koul

ioatdma: Adding write back descriptor error status support for ioatdma 3.3

2013-04-15T17:16:15+00:00

v3.3 provides support for write back descriptor error status. This allows
reporting of errors in a descriptor field. In supporting this, certain
errors such as P/Q validation errors no longer halts the channel. The DMA
engine can continue to execute until the end of the chain and allow software
to report the "errors" up the stack. We are also going to mask those error
interrupts and handle them when the "chain" has completed at the end.

Signed-off-by: Dave Jiang 
Acked-by: Dan Williams 
Signed-off-by: Vinod Koul

ioatdma: S1200 platforms ioatdma channel 2 and 3 falsely advertise RAID cap

2013-04-15T17:16:15+00:00

This workaround checks for channel 2&3 and remove RAID cap.

Signed-off-by: Dave Jiang 
Acked-by: Dan Williams 
Signed-off-by: Vinod Koul

ioatdma: Adding support for 16 src PQ ops and super extended descriptors

2013-04-15T17:16:15+00:00

v3.3 introduced 16 sources PQ operations. This also introduced super extended
descriptors to support the 16 srcs operations. This patch adds support for
the 16 sources ops and in turn adds the super extended descriptors for those
ops.

5 SED pools are created depending on the descriptor sizes. An SED can be a 64
bytes sized descriptor or larger and must be physically contiguous. A kmem
cache pool is created for allocating the software descriptor that manages the
hardware descriptor. The super extended descriptor will take place of extended
descriptor under certain operations and be "attached" to the op descriptor
during operation. This is a new feature for ioatdma v3.3.

Signed-off-by: Dave Jiang 
Acked-by: Dan Williams 
Acked-by: Dan Williams 
Signed-off-by: Vinod Koul

ioatdma: Removing hw bug workaround for CB3.x .2 and earlier

2013-04-15T17:16:14+00:00

CB3.2 and earlier hardware has silicon bugs that are no longer needed with
the new hardware. We don't have to use a NULL op to signal interrupt for
RAID ops any longer. This code make sure the legacy workarounds only happen on
legacy hardware.

Signed-off-by: Dave Jiang 
Acked-by: Dan Williams 
Signed-off-by: Vinod Koul

ioatdma: skip silicon bug workaround for pq_align for cb3.3

2013-04-15T04:21:20+00:00

The alignment workaround is only necessary for cb3.2 or earlier platforms.

Signed-off-by: Dave Jiang 
Acked-by: Dan Williams 
Signed-off-by: Vinod Koul

ioatdma: Removing PQ val disable for cb3.3

2013-04-15T04:21:20+00:00

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

ioatdma: skip legacy reset bits since v3.3 plattform doesn't need it

2013-04-15T04:21:20+00:00

Make it so only 3.2 and earlier platform need the PCI config register
clearings since this implementation does not have the registers.

Signed-off-by: Dave Jiang 
Acked-by: Dan Williams 
Signed-off-by: Vinod Koul