linux.git/drivers/dma/pl330.c, branch v4.9

Merge branch 'topic/pl330' into for-linus

2016-10-03T03:49:03+00:00

dmaengine: pl330: Acquire dmac's spinlock in pl330_tx_status

2016-09-09T11:52:42+00:00

There is a racing when accessing dmac thread in pl330_tx_status that
the pl330_update is handling active request at the same time and
changing the status of descriptors. This could cause an invalid
transferred count from BUSY descriptor added up to the residual number.
Fix the bug by using the dmac's spinlock in pl330_tx_status to protect
thread resources from changing.
Note that the nested order of holding dmac's and dma_chan's spinlock is
consistent with the rest of the driver: dma_chan first and then dmac,
so it is safe from deadlock scenario.

Signed-off-by: Hsin-Yu Chao 
Reviewed-by: Guenter Roeck 
Signed-off-by: Vinod Koul

dmaengine: pl330: fix residual for non-running BUSY descriptors

2016-09-09T11:49:09+00:00

Only one descriptor in the work list should be running at
any given time, but it's possible to have an enqueued BUSY
descriptor that has not yet transferred any data, or for
a BUSY descriptor to linger briefly before transitioning
to DONE. These cases should be handled to keep residual
calculations consistent even with the non-running BUSY
descriptors in the work list.

Signed-off-by: Stephen Barber 
Signed-off-by: Vinod Koul

dmaengine: pl330: convert callback to helper function

2016-08-08T02:41:40+00:00

This is in preperation of moving to a callback that provides results to the
callback for the transaction. The conversion will maintain current behavior
and the driver must convert to new callback mechanism at a later time in
order to receive results.

Signed-off-by: Dave Jiang 
Reviewed-by: Lars-Peter Clausen 
Signed-off-by: Vinod Koul

dmaengine: pl330: explicitly freeup irq

2016-07-16T14:49:05+00:00

dmaengine device should explicitly call devm_free_irq() when using
devm_request_irq().

The irq is still ON when devices remove is executed and irq should be
quiesced before remove is completed.

Signed-off-by: Vinod Koul 
Cc: Jassi Brar 
Cc: Linus Walleij

dmaengine: Remove site specific OOM error messages on kzalloc

2016-06-21T16:05:00+00:00

If kzalloc() fails it will issue it's own error message including
a dump_stack(). So remove the site specific error messages.

Signed-off-by: Peter Griffin 
Acked-by: Jon Hunter 
Acked-by: Linus Walleij 
Signed-off-by: Vinod Koul

dmaengine: pl330: fix to support the burst mode

2016-03-01T03:41:25+00:00

This patch fixes the burst mode that will break DMA uart on SoCFPGA.

In some cases, some SoCS didn't support the multi-burst
even if the devices who use the pl330 claim support the maxburst.

Fixes: commit 848e977
"dmaengine: pl330: support burst mode for dev-to-mem and mem-to-dev transmit"

Reported-by: Dinh Nguyen 
Signed-off-by: Caesar Wang 
Tested-by: Bartlomiej Zolnierkiewicz 
Tested-by: Dinh Nguyen 
Signed-off-by: Vinod Koul

dmaengine: pl330: add max burst for dmaengine

2016-02-09T03:31:41+00:00

This patch add max burst capability for dmaengine and
limit burst capability to one for PL330_QUIRK_BROKEN_NO_FLUSHP

Signed-off-by: Shawn Lin 
Signed-off-by: Caesar Wang 
Signed-off-by: Vinod Koul

dmaengine: pl330: add quirk for broken no flushp

2016-02-09T03:31:41+00:00

This patch add "arm,pl330-broken-no-flushp" quirk to avoid execute
DMAFLUSHP if Soc doesn't support it.

Signed-off-by: Addy Ke 
Signed-off-by: Shawn Lin 
cc: Doug Anderson 
cc: Heiko Stuebner 
cc: Olof Johansson 

Reviewed-by: Sonny Rao 
Signed-off-by: Caesar Wang 
Signed-off-by: Vinod Koul

dmaengine: pl330: support burst mode for dev-to-mem and mem-to-dev transmit

2016-02-09T03:31:41+00:00

This patch adds to support burst mode for dev-to-mem and
mem-to-dev transmit.

Signed-off-by: Boojin Kim 
Signed-off-by: Addy Ke 
Signed-off-by: Shawn Lin 
cc: Heiko Stuebner 
cc: Doug Anderson 
cc: Olof Johansson 

Reviewed-by: Sonny Rao 
Signed-off-by: Caesar Wang 
Signed-off-by: Vinod Koul