linux-stable.git/drivers/dma/xilinx, branch linux-4.6.y Linux kernel stable tree dmaengine: vdma: don't crash when bad channel is requested 2016-04-05T18:10:57+00:00 Franck Jullien franck.jullien@odyssee-systemes.fr 2016-03-22T10:52:22+00:00 330ed4da2c8eb821e70b1366a7af53eb1c7421fb When client request a non existing channel from of_dma_xilinx_xlate we get a NULL pointer dereferencing. This patch fix this problem. Signed-off-by: Franck Jullien <franck.jullien@odyssee-systemes.fr> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
When client request a non existing channel from of_dma_xilinx_xlate
we get a NULL pointer dereferencing. This patch fix this problem.

Signed-off-by: Franck Jullien <franck.jullien@odyssee-systemes.fr>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dmaengine: xilinx_vdma: Remove unnecessary variable initializations 2016-03-04T15:03:13+00:00 Kedareswara rao Appana appana.durga.rao@xilinx.com 2016-03-03T17:32:42+00:00 694906348d0c3a0975a0d75f14ceb3239cfeb4e0 This patch removes the unnecessary variable initializations in the driver. Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
This patch removes the unnecessary variable initializations
in the driver.

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dmaengine: xilinx_vdma: Use readl_poll_timeout instead of do while loop's 2016-03-03T15:32:38+00:00 Kedareswara rao Appana appana.durga.rao@xilinx.com 2016-02-26T14:03:54+00:00 9495f2648287029fb5545c34a0fa318426ebe84c It is sometimes necessary to poll a memory-mapped register until its value satisfies some condition use convenience macros that do this instead of do while loop's. This patch updates the same in the driver. Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
It is sometimes necessary to poll a memory-mapped register until its
value satisfies some condition use convenience macros
that do this instead of do while loop's.

This patch updates the same in the driver.

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dmaengine: xilinx_vdma: Simplify spin lock handling 2016-03-03T15:32:38+00:00 Kedareswara rao Appana appana.durga.rao@xilinx.com 2016-02-26T14:03:52+00:00 26c5e36931b3fea7461ba6f0d8b65eb25ce2b917 This patch simplifies the spin lock handling in the driver by moving locking out of xilinx_dma_start_transfer() API and xilinx_dma_update_completed_cookie() API. Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
This patch simplifies the spin lock handling in the driver
by moving locking out of xilinx_dma_start_transfer() API
and xilinx_dma_update_completed_cookie() API.

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dmaengine: xilinx_vdma: Fix issues with non-parking mode 2016-03-03T15:32:38+00:00 Kedareswara rao Appana appana.durga.rao@xilinx.com 2016-02-26T14:03:53+00:00 e2b538a77d99706a9d2dc12925f3f8477c724dcc This patch fixes issues with the Non-parking mode(Cirular mode). With the existing driver in cirular mode if we submit frames less than h/w configured we simply end-up having misconfigured vdma h/w. This patch fixes this issue by configuring the frame count register. Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
This patch fixes issues with the Non-parking mode(Cirular mode).
With the  existing driver in cirular mode if we submit frames less than h/w
configured we simply end-up having misconfigured vdma h/w.
This patch fixes this issue by configuring the frame count register.

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dmaengine: xilinx_vdma: Improve SG engine handling 2016-03-03T15:32:38+00:00 Kedareswara rao Appana appana.durga.rao@xilinx.com 2016-02-26T14:03:51+00:00 7096f36e5388beb06b80576d3ccc3a0df2760035 The current driver allows user to queue up multiple segments on to a single transaction descriptor. User will submit this single desc and in the issue_pending() we decode multiple segments and submit to SG HW engine. We free up the allocated_desc when it is submitted to the HW. Existing code prevents the user to prepare multiple trasactions at same time as we are overwrite with the allocated_desc. The best utilization of HW SG engine would happen if we collate the pending list when we start dma this patch updates the same. Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
The current driver allows user to queue up multiple segments
on to a single transaction descriptor. User will submit this single desc
and in the issue_pending() we decode multiple segments and submit to SG HW engine.
We free up the allocated_desc when it is submitted to the HW.

Existing code prevents the user to prepare multiple trasactions at same time as
we are overwrite with the allocated_desc.

The best utilization of HW SG engine would happen if we collate the pending
list when we start dma this patch updates the same.

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dmaengine: xilinx: Fix module autoload for OF platform driver 2015-10-01T02:05:39+00:00 Luis de Bethencourt luis@debethencourt.com 2015-09-16T21:00:17+00:00 ad577e4642e7168f47146895db5791462b096c0f This platform driver has a OF device ID table but the OF module alias information is not created so module autoloading won't work. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Moritz Fischer <moritz.fischer@ettus.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
This platform driver has a OF device ID table but the OF module
alias information is not created so module autoloading won't work.

Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Moritz Fischer <moritz.fischer@ettus.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dmaengine: xilinx-dma: move header file to common location 2015-03-17T10:53:21+00:00 Kedareswara rao Appana appana.durga.rao@xilinx.com 2015-03-02T17:54:24+00:00 937abe88aea3161cd3a563e577fc9cf4522c7aad This patch moves the xilinx_dma.h header file to the include/linux/dma. Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
This patch moves the xilinx_dma.h header file
to the include/linux/dma.

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dmaengine: xilinx: Split device_control 2014-12-22T07:03:21+00:00 Maxime Ripard maxime.ripard@free-electrons.com 2014-11-17T13:42:38+00:00 ba7140462fe0bdf50da50221e3fe143f6a2b33e7 Split the device_control callback of the Xilinx VDMA driver to make use of the newly introduced callbacks, that will eventually be used to retrieve slave capabilities. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
Split the device_control callback of the Xilinx VDMA driver to make use of the
newly introduced callbacks, that will eventually be used to retrieve slave
capabilities.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dmaengine: xilinx: vdma: icg should be difference of stride and hsize 2014-11-06T07:41:47+00:00 Srikanth Thokala srikanth.thokala@xilinx.com 2014-11-05T18:37:02+00:00 6d80f45f502e9f5270993122ac477a06176aa368 This patch modifies the icg field to match the description as mentioned in the DMA Linux framework. Signed-off-by: Srikanth Thokala <sthokal@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
This patch modifies the icg field to match the description
as mentioned in the DMA Linux framework.

Signed-off-by: Srikanth Thokala <sthokal@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>