linux-toradex.git/drivers/rapidio, branch v4.1.10

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

2015-02-18T16:49:20+00:00

Pull dmaengine updates from Vinod Koul:
 "This update brings:

   - the big cleanup up by Maxime for device control and slave
     capabilities.  This makes the API much cleaner.

   - new IMG MDC driver by Andrew

   - new Renesas R-Car Gen2 DMA Controller driver by Laurent along with
     bunch of fixes on rcar drivers

   - odd fixes and updates spread over driver"

* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (130 commits)
  dmaengine: pl330: add DMA_PAUSE feature
  dmaengine: pl330: improve pl330_tx_status() function
  dmaengine: rcar-dmac: Disable channel 0 when using IOMMU
  dmaengine: rcar-dmac: Work around descriptor mode IOMMU errata
  dmaengine: rcar-dmac: Allocate hardware descriptors with DMAC device
  dmaengine: rcar-dmac: Fix oops due to unintialized list in error ISR
  dmaengine: rcar-dmac: Fix spinlock issues in interrupt
  dmaenegine: edma: fix sparse warnings
  dmaengine: rcar-dmac: Fix uninitialized variable usage
  dmaengine: shdmac: extend PM methods
  dmaengine: shdmac: use SET_RUNTIME_PM_OPS()
  dmaengine: pl330: fix bug that cause start the same descs in cyclic
  dmaengine: at_xdmac: allow muliple dwidths when doing slave transfers
  dmaengine: at_xdmac: simplify channel configuration stuff
  dmaengine: at_xdmac: introduce save_cc field
  dmaengine: at_xdmac: wait for in-progress transaction to complete after pausing a channel
  ioat: fail self-test if wait_for_completion times out
  dmaengine: dw: define DW_DMA_MAX_NR_MASTERS
  dmaengine: dw: amend description of dma_dev field
  dmatest: move src_off, dst_off, len inside loop
  ...

rapidio/tsi721: use PCI define for Max_Read_Request_Size

2015-01-27T14:14:26+00:00

Replace a magic number with a PCI #define symbol.

Signed-off-by: Rafał Miłecki 
Signed-off-by: Bjorn Helgaas 
Acked-by: Alexandre Bounine

dmaengine: rapidio: tsi721: Rename device_control

2014-12-22T07:03:22+00:00

Rename the device_control callback of the TXX9 DMA driver to terminate_all
since it's all it's really doing. That will eventually be used to retrieve
slave capabilities.

Signed-off-by: Maxime Ripard 
Signed-off-by: Vinod Koul

PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use

2014-08-12T18:15:14+00:00

We should prefer `struct pci_device_id` over `DEFINE_PCI_DEVICE_TABLE` to
meet kernel coding style guidelines.  This issue was reported by checkpatch.

A simplified version of the semantic patch that makes this change is as
follows (http://coccinelle.lip6.fr/):

// 

@@
identifier i;
declarer name DEFINE_PCI_DEVICE_TABLE;
initializer z;
@@

- DEFINE_PCI_DEVICE_TABLE(i)
+ const struct pci_device_id i[]
= z;

// 

[bhelgaas: add semantic patch]
Signed-off-by: Benoit Taine 
Signed-off-by: Bjorn Helgaas

rapidio/tsi721_dma: rework scatter-gather list handling

2014-08-08T22:57:24+00:00

Rework Tsi721 RapidIO DMA engine support to allow handling data
scatter/gather lists longer than number of hardware buffer descriptors in
the DMA channel's descriptor list.

The current implementation of Tsi721 DMA transfers requires that number of
entries in a scatter/gather list provided by a caller of
dmaengine_prep_rio_sg() should not exceed number of allocated hardware
buffer descriptors.

This patch removes the limitation by processing long scatter/gather lists
by sections that can be transferred using hardware descriptor ring of
configured size.  It also introduces a module parameter
"dma_desc_per_channel" to allow run-time configuration of Tsi721 hardware
buffer descriptor rings.

Signed-off-by: Alexandre Bounine 
Cc: Matt Porter 
Cc: Andre van Herk 
Cc: Stef van Os 
Cc: Vinod Koul 
Cc: Dan Williams 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio: add new RapidIO DMA interface routines

2014-08-08T22:57:24+00:00

Add RapidIO DMA interface routines that directly use reference to the mport
device object and/or target device destination ID as parameters.
This allows to perform RapidIO DMA transfer requests by modules that do not
have an access to the RapidIO device list.

Signed-off-by: Alexandre Bounine 
Cc: Matt Porter 
Cc: Andre van Herk 
Cc: Stef van Os 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio/tsi721_dma: fix failure to obtain transaction descriptor

2014-07-31T00:16:13+00:00

This is a bug fix for the situation when function tsi721_desc_get() fails
to obtain a free transaction descriptor.

The bug usually results in a memory access crash dump when data transfer
scatter-gather list has more entries than size of hardware buffer
descriptors ring.  This fix ensures that error is properly returned to a
caller instead of an invalid entry.

This patch is applicable to kernel versions starting from v3.5.

Signed-off-by: Alexandre Bounine 
Cc: Matt Porter 
Cc: Andre van Herk 
Cc: Stef van Os 
Cc: Vinod Koul 
Cc: Dan Williams 
Cc: 	[3.5+]
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio/tsi721: use pci_enable_msix_exact() instead of pci_enable_msix()

2014-06-06T23:08:13+00:00

As result of deprecation of MSI-X/MSI enablement functions
pci_enable_msix() and pci_enable_msi_block() all drivers using these two
interfaces need to be updated to use the new pci_enable_msi_range() or
pci_enable_msi_exact() and pci_enable_msix_range() or
pci_enable_msix_exact() interfaces.

The patch has no runtime effect.

Signed-off-by: Alexander Gordeev 
Cc: Matt Porter 
Acked-by: Alexandre Bounine 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio: rework device hierarchy and introduce mport class of devices

2014-04-07T23:36:07+00:00

This patch removes an artificial RapidIO bus root device and establishes
actual device hierarchy by providing reference to real parent devices.
It also introduces device class for RapidIO controller devices (on-chip
or an eternal bridge, known as "mport").

Existing implementation was sufficient for SoC-based platforms that have
a single RapidIO controller.  With introduction of devices using
multiple RapidIO controllers and PCIe-to-RapidIO bridges the old scheme
is very limiting or does not work at all.  The implemented changes allow
to properly reference platform's local RapidIO mport devices and provide
device details needed for upper layers.

This change to RapidIO device hierarchy does not break any known
existing kernel or user space interfaces.

Signed-off-by: Alexandre Bounine 
Cc: Matt Porter 
Cc: Li Yang 
Cc: Kumar Gala 
Cc: Andre van Herk 
Cc: Stef van Os 
Cc: Jerry Jacobs 
Cc: Arno Tiemersma 
Cc: Rob Landley 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

drivers/rapidio/devices/tsi721_dma.c: optimize use of BDMA descriptors

2014-04-07T23:36:07+00:00

Combine SG entries describing single contiguous memory block into one
Tsi721 BDMA descriptor.  This reduces number of hardware descriptors
required for large data transfers and improves performance on the PCIe
side by reducing number of descriptor fetch requests.

Signed-off-by: Alexandre Bounine 
Cc: Matt Porter 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds