Skip to content

L
linux
Switch branch/tag
  1. 01 Jun, 2014 10 commits
  3. 22 May, 2014 4 commits
  5. 21 May, 2014 1 commit
  7. 07 May, 2014 8 commits
  9. 02 May, 2014 13 commits
  11. 30 Apr, 2014 4 commits
    • Joel Fernandes's avatar
      dmaengine: edma: update DMA memcpy to use new param element · b0cce4ca
      Joel Fernandes authored 
      edma param struct is now within an edma_pset struct introduced in Thomas
Gleixner's edma tx status series. Update memcpy function for the same.

Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarJoel Fernandes <joelf@ti.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
      b0cce4ca
    • Joel Fernandes's avatar
      dmaengine: edma: Document variables used for residue accounting · 04361d88
      Joel Fernandes authored 
      The granular residue accounting code uses certain variables specifically
for residue accounting. Document these in the structure declaration.
Also move around some elements and group them together.

Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarJoel Fernandes <joelf@ti.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
      04361d88
    • Thomas Gleixner's avatar
      dmaengine: edma: Provide granular accounting · 740b41f7
      Thomas Gleixner authored 
      The first slot in the ParamRAM of EDMA holds the current active
subtransfer. Depending on the direction we read either the source or
the destination address from there. In the internal psets we have the
address of the buffer(s).

In the cyclic case we only use the internal pset[0] which holds the
start address of the circular buffer and calculate the remaining room
to the end of the buffer.

In the SG case we read the current address and compare it to the
internal psets address and length.

- If the current address is outside of this range, the pset has been
  processed already and we mark it done, update the residue_stat value
  and process the next set. That avoids that we need to walk all
  processed psets for every invocation of tx_status.

- If its inside the range we know that we look at the current active
  set and stop the walk.

- In case of intermediate transfers we update the stats in the
  interrupt callback function before starting the next batch of
  transfers. The tx_status callback and the interrupt callback are
  serialized via vchan.lock.
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
[joelf@ti.com: Hunk #2 in original patch manually applied]
Signed-off-by: default avatarJoel Fernandes <joelf@ti.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
      740b41f7
    • Thomas Gleixner's avatar
      dmaengine: edma: Make reading the position of active channels work · cdae05a0
      Thomas Gleixner authored 
      As Joel pointed out, edma_read_position() uses memcpy_fromio() to read
the parameter ram. That's not synchronized with the internal update as
it does a byte by byte copy. We need to do a 32bit read to get a
consistent value.

Further reading destination and source is pointless. In DEV_TO_MEM
transfers we are only interested in the destination, in MEM_TO_DEV we
care about the source. In MEM_TO_MEM it really does not matter which
one you read.

Simple solution: Remove the pointers, select dest/source via a bool
and return the read value.

Remove the export of this function while at it. The only potential
user is the dmaengine and that's always builtin.
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Acked-by: default avatarSekhar Nori <nsekhar@ti.com>
Signed-off-by: default avatarJoel Fernandes <joelf@ti.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
      cdae05a0
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7