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2020-07-17dmaengine: xilinx: dpdma: Add the Xilinx DisplayPort DMA engine driverHyun Kwon4-0/+1545
The ZynqMP DisplayPort subsystem includes a DMA engine called DPDMA with 6 DMa channels (4 for display and 2 for audio). This driver exposes the DPDMA through the dmaengine API, to be used by audio (ALSA) and display (DRM) drivers for the DisplayPort subsystem. Signed-off-by: Hyun Kwon <hyun.kwon@xilinx.com> Signed-off-by: Tejas Upadhyay <tejasu@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Link: https://lore.kernel.org/r/20200717013337.24122-4-laurent.pinchart@ideasonboard.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-07-17dmaengine: Add support for repeating transactionsLaurent Pinchart3-1/+69
DMA engines used with displays perform 2D interleaved transfers to read framebuffers from memory and feed the data to the display engine. As the same framebuffer can be displayed for multiple frames, the DMA transactions need to be repeated until a new framebuffer replaces the current one. This feature is implemented natively by some DMA engines that have the ability to repeat transactions and switch to a new transaction at the end of a transfer without any race condition or frame loss. This patch implements support for this feature in the DMA engine API. A new DMA_PREP_REPEAT transaction flag allows DMA clients to instruct the DMA channel to repeat the transaction automatically until one or more new transactions are issued on the channel (or until all active DMA transfers are explicitly terminated with the dmaengine_terminate_*() functions). A new DMA_REPEAT transaction type is also added for DMA engine drivers to report their support of the DMA_PREP_REPEAT flag. A new DMA_PREP_LOAD_EOT transaction flag is also introduced (with a corresponding DMA_LOAD_EOT capability bit), as requested during the review of v4. The flag instructs the DMA channel that the transaction being queued should replace the active repeated transaction when the latter terminates (at End Of Transaction). Not setting the flag will result in the active repeated transaction to continue being repeated, and the new transaction being silently ignored. The DMA_PREP_REPEAT flag is currently supported for interleaved transactions only. Its usage can easily be extended to cover more transaction types simply by adding an appropriate check in the corresponding dmaengine_prep_*() function. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Link: https://lore.kernel.org/r/20200717013337.24122-3-laurent.pinchart@ideasonboard.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-07-17dt: bindings: dma: xilinx: dpdma: DT bindings for Xilinx DPDMALaurent Pinchart3-0/+92
The ZynqMP includes the DisplayPort subsystem with its own DMA engine called DPDMA. The DPDMA IP comes with 6 individual channels (4 for display, 2 for audio). This documentation describes DT bindings of DPDMA. Signed-off-by: Hyun Kwon <hyun.kwon@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20200717013337.24122-2-laurent.pinchart@ideasonboard.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-06-14Linux 5.8-rc1Linus Torvalds1-2/+2
2020-06-14security: Add LSM hooks to set*gid syscallsThomas Cedeno5-1/+40
The SafeSetID LSM uses the security_task_fix_setuid hook to filter set*uid() syscalls according to its configured security policy. In preparation for adding analagous support in the LSM for set*gid() syscalls, we add the requisite hook here. Tested by putting print statements in the security_task_fix_setgid hook and seeing them get hit during kernel boot. Signed-off-by: Thomas Cedeno <thomascedeno@google.com> Signed-off-by: Micah Morton <mortonm@chromium.org>
2020-06-14Revert "btrfs: switch to iomap_dio_rw() for dio"David Sterba4-166/+169
This reverts commit a43a67a2d715540c1368b9501a22b0373b5874c0. This patch reverts the main part of switching direct io implementation to iomap infrastructure. There's a problem in invalidate page that couldn't be solved as regression in this development cycle. The problem occurs when buffered and direct io are mixed, and the ranges overlap. Although this is not recommended, filesystems implement measures or fallbacks to make it somehow work. In this case, fallback to buffered IO would be an option for btrfs (this already happens when direct io is done on compressed data), but the change would be needed in the iomap code, bringing new semantics to other filesystems. Another problem arises when again the buffered and direct ios are mixed, invalidation fails, then -EIO is set on the mapping and fsync will fail, though there's no real error. There have been discussions how to fix that, but revert seems to be the least intrusive option. Link: https://lore.kernel.org/linux-btrfs/20200528192103.xm45qoxqmkw7i5yl@fiona/ Signed-off-by: David Sterba <dsterba@suse.com>
2020-06-13net: ethernet: ti: ale: fix allmulti for nu type aleGrygorii Strashko1-9/+40
On AM65xx MCU CPSW2G NUSS and 66AK2E/L NUSS allmulti setting does not allow unregistered mcast packets to pass. This happens, because ALE VLAN entries on these SoCs do not contain port masks for reg/unreg mcast packets, but instead store indexes of ALE_VLAN_MASK_MUXx_REG registers which intended for store port masks for reg/unreg mcast packets. This path was missed by commit 9d1f6447274f ("net: ethernet: ti: ale: fix seeing unreg mcast packets with promisc and allmulti disabled"). Hence, fix it by taking into account ALE type in cpsw_ale_set_allmulti(). Fixes: 9d1f6447274f ("net: ethernet: ti: ale: fix seeing unreg mcast packets with promisc and allmulti disabled") Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-13net: ethernet: ti: am65-cpsw-nuss: fix ale parameters initGrygorii Strashko1-1/+1
The ALE parameters structure is created on stack, so it has to be reset before passing to cpsw_ale_create() to avoid garbage values. Fixes: 93a76530316a ("net: ethernet: ti: introduce am65x/j721e gigabit eth subsystem driver") Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-13net: atm: Remove the error message according to the atomic contextLiao Pingfang1-3/+1
Looking into the context (atomic!) and the error message should be dropped. Signed-off-by: Liao Pingfang <liao.pingfang@zte.com.cn> Signed-off-by: David S. Miller <davem@davemloft.net>