linux-toradex.git/drivers/dma, branch T20_LinuxImageV2.0Beta1_20121218

dmaengine: add context parameter to prep_slave_sg and prep_dma_cyclic

2012-04-05T16:11:50+00:00

Add context parameter to device_prep_slave_sg() and device_prep_dma_cyclic()
interfaces to allow passing client/target specific information associated
with the data transfer.
Modify all affected DMA engine drivers.

Signed-off-by: Alexandre Bounine 
Acked-by: Linus Walleij 
Acked-by: Felipe Balbi 
Signed-off-by: Vinod Koul 

Cherry-picked from mainline
	185ecb5f4fd43911c35956d4cc7d94a1da30417f

Change-Id: Ief79d20f6e9d367ee2b530d08df72864fb16895a
Signed-off-by: Laxman Dewangan 
Reviewed-on: http://git-master/r/94464
Reviewed-by: Automatic_Commit_Validation_User

dmaengine/dw_dmac: Reconfigure interrupt and chan_cfg register on resume

2012-04-03T16:36:18+00:00

In S2R all DMA registers are reset by hardware and thus they are required to be
reprogrammed. The channels which aren't reprogrammed are channel configuration
and interrupt enable registers, which are currently programmed at chan_alloc
time.

This patch creates another routine to initialize a channel. It will try to
initialize channel on every dwc_dostart() call. If channel is already
initialised then it simply returns, otherwise it configures registers.

This routine will also initialize registers on wakeup from S2R, as we mark
channels as uninitialized on suspend.

Signed-off-by: Viresh Kumar 
Signed-off-by: Vinod Koul 
cherry-picked from mainline 61e183f8306934a9f66557f69f1f0f56f18dca06

Change-Id: I4ede3e1db8844533161bd4a836b1fece0d0ee716
Signed-off-by: Laxman Dewangan 
Reviewed-on: http://git-master/r/93784
Reviewed-by: Automatic_Commit_Validation_User

dmaengine: consolidate initialization of cookies

2012-04-03T16:36:16+00:00

Provide a common function to initialize a channels cookie values.

Change-Id: Idc822d69971d7a6d26ffea8809df4825b87020e5
Signed-off-by: Russell King 
Tested-by: Linus Walleij 
Reviewed-by: Linus Walleij 
Acked-by: Jassi Brar 
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo 
Signed-off-by: Vinod Koul 
(cherry picked from mainline commit
	d3ee98cdcd6198ea1cf75c603178acc8a805b69b)

Signed-off-by: Laxman Dewangan 
Change-Id: Id7d52f05b78d15b0c61cb04122b19810e78b9269
Reviewed-on: http://git-master/r/93783

dmaengine: consolidate tx_status functions

2012-04-03T16:36:14+00:00

Now that we have the completed cookie in the dma_chan structure, we
can consolidate the tx_status functions by providing a function to set
the txstate structure and returning the DMA status.  We also provide
a separate helper to set the residue for cookies which are still in
progress.

Change-Id: I4b7672bbd17d072bfde348d04481c8db48e814c4
Signed-off-by: Russell King 
Tested-by: Linus Walleij 
Reviewed-by: Linus Walleij 
Acked-by: Jassi Brar 
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo 
Signed-off-by: Vinod Koul 
(cherry picked from mainline commit
	96a2af41c78b1fbb1f567a3486bdc63f7b31c5fd)

Signed-off-by: Laxman Dewangan 
Change-Id: Ifdb55d85eb4789f221679f1f38f5566168e5c643
Reviewed-on: http://git-master/r/93782
Reviewed-by: Automatic_Commit_Validation_User

dmaengine: provide a common function for completing a dma descriptor

2012-04-03T16:36:11+00:00

Provide a common function to do the cookie mechanics for completing
a DMA descriptor.

Signed-off-by: Russell King 
Tested-by: Linus Walleij 
Reviewed-by: Linus Walleij 
Acked-by: Jassi Brar 
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo 
Signed-off-by: Vinod Koul 
Cherry-picked from mainline commit
	f7fbce07c6ce26a25b4e0cb5f241c361fde87901

Change-Id: I0b0a9d4ad538db4fda227cc91436c44bc4a6f206
Signed-off-by: Laxman Dewangan 
Reviewed-on: http://git-master/r/93781
Reviewed-by: Automatic_Commit_Validation_User

dmaengine: consolidate assignment of DMA cookies

2012-04-03T16:36:08+00:00

Everyone deals with assigning DMA cookies in the same way (it's part of
the API so they should be), so lets consolidate the common code into a
helper function to avoid this duplication.

Change-Id: I730882ff0f84f9ae42dd137a8926b7ae10868370
Signed-off-by: Russell King 
Tested-by: Linus Walleij 
Reviewed-by: Linus Walleij 
Acked-by: Jassi Brar 
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo 
Signed-off-by: Vinod Koul 
(cherry picked from mainline commit 884485e1f12dcd39390f042e772cdbefc9ebb750)

Signed-off-by: Laxman Dewangan 
Change-Id: Ifc4a395a5dbafad03f8b28e052ad0e7ea5d90163
Reviewed-on: http://git-master/r/93780
Reviewed-by: Automatic_Commit_Validation_User

dmaengine: add private header file

2012-04-03T16:36:05+00:00

Add a local private header file to contain definitions and declarations
which should only be used by DMA engine drivers.

We also fix linux/dmaengine.h to use LINUX_DMAENGINE_H to guard against
multiple inclusion.

Signed-off-by: Russell King 
Tested-by: Linus Walleij 
Reviewed-by: Linus Walleij 
Acked-by: Jassi Brar 
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo 
Signed-off-by: Vinod Koul 
(cherry picked from mainline commit d2ebfb335b0426deb1a4fb14e4e926d81ecd8235)

Change-Id: I91b051537fa1890e2651ebe0409fa97cbc9191dd
Signed-off-by: Laxman Dewangan 
Reviewed-on: http://git-master/r/93779
Reviewed-by: Automatic_Commit_Validation_User

dmaengine: move last completed cookie into generic dma_chan structure

2012-04-03T16:35:53+00:00

Every DMA engine implementation declares a last completed dma cookie
in their private dma channel structures.  This is pointless, and
forces driver specific code.  Move this out into the common dma_chan
structure.

Signed-off-by: Russell King 
Tested-by: Linus Walleij 
Reviewed-by: Linus Walleij 
Acked-by: Jassi Brar 
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo 
Signed-off-by: Vinod Koul 
cherry-picked from mainline
		4d4e58de32a192fea65ab84509d17d199bd291c8

Change-Id: Ib653bcfa5f492986946fd34006a8de3090db0441
Signed-off-by: Laxman Dewangan 
Reviewed-on: http://git-master/r/93778

dmaengine/ste_dma40: fix memory leak due to prepared descriptors

2011-09-05T11:38:26+00:00

Prepared descriptors that are not submitted will not be freed. Add
prepared descriptor to a list to be able to release them upon
dmaengine_terminate_all().

Signed-off-by: Per Forlin 
Acked-by: Linus Walleij 
Signed-off-by: Vinod Koul

dmaengine/ste_dma40: fix Oops due to double free of client descriptor

2011-09-05T11:37:58+00:00

The client list may exist in two lists at the same time. This makes free
fail since the same desc is freed multiple times. Remove desc from
client list when adding it to the pending queue. Move free of client owned
descriptors from free_dma() to terminate_all().

Unable to handle kernel paging request at virtual address 00100104
pgd = dea8c000
[00100104] *pgd=1ea62831, *pte=00000000, *ppte=00000000
Internal error: Oops: 817 [#1] PREEMPT SMP
Modules linked in:
CPU: 0    Not tainted  (3.1.0-rc3+ #58)
PC is at d40_free_chan_resources+0x64/0x330

Signed-off-by: Per Forlin 
Acked-by: Linus Walleij 
Signed-off-by: Vinod Koul