kernel/linux.git/drivers/dma/virt-dma.c, branch v7.1

dmaengine: virt-dma: add missing MODULE_DESCRIPTION() macro

2024-06-28T07:33:13+00:00

With ARCH=loongarch, make allmodconfig && make W=1 C=1 reports: WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/dma/virt-dma.o Add the missing invocation of the MODULE_DESCRIPTION() macro. Signed-off-by: Jeff Johnson Link: https://lore.kernel.org/r/20240616-md-loongarch-drivers-dma-virt-dma-v1-1-70ed3dcbf8aa@quicinc.com Signed-off-by: Vinod Koul

dmaengine: virt-dma: convert tasklets to use new tasklet_setup() API

2020-09-18T06:49:07+00:00

In preparation for unconditionally passing the struct tasklet_struct pointer to all tasklet callbacks, switch to using the new tasklet_setup() and from_tasklet() to pass the tasklet pointer explicitly. Signed-off-by: Romain Perier Signed-off-by: Allen Pais Reviewed-by: Peter Ujfalusi Link: https://lore.kernel.org/r/20200831103542.305571-31-allen.lkml@gmail.com Signed-off-by: Vinod Koul

Merge tag 'dmaengine-5.6-rc1' of git://git.infradead.org/users/vkoul/slave-dma

2020-01-27T18:55:50+00:00

Pull dmaengine updates from Vinod Koul: "This time we have a bunch of core changes to support dynamic channels, hotplug of controllers, new apis for metadata ops etc along with new drivers for Intel data accelerators, TI K3 UDMA, PLX DMA engine and hisilicon Kunpeng DMA engine. Also usual assorted updates to drivers. Core: - Support for dynamic channels - Removal of various slave wrappers - Make few slave request APIs as private to dmaengine - Symlinks between channels and slaves - Support for hotplug of controllers - Support for metadata_ops for dma_async_tx_descriptor - Reporting DMA cached data amount - Virtual dma channel locking updates New drivers/device/feature support support: - Driver for Intel data accelerators - Driver for TI K3 UDMA - Driver for PLX DMA engine - Driver for hisilicon Kunpeng DMA engine - Support for eDMA support for QorIQ LS1028A in fsl edma driver - Support for cyclic dma in sun4i driver - Support for X1830 in JZ4780 driver" * tag 'dmaengine-5.6-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (62 commits) dmaengine: Create symlinks between DMA channels and slaves dmaengine: hisilicon: Add Kunpeng DMA engine support dmaengine: idxd: add char driver to expose submission portal to userland dmaengine: idxd: connect idxd to dmaengine subsystem dmaengine: idxd: add descriptor manipulation routines dmaengine: idxd: add sysfs ABI for idxd driver dmaengine: idxd: add configuration component of driver dmaengine: idxd: Init and probe for Intel data accelerators dmaengine: add support to dynamic register/unregister of channels dmaengine: break out channel registration x86/asm: add iosubmit_cmds512() based on MOVDIR64B CPU instruction dmaengine: ti: k3-udma: fix spelling mistake "limted" -> "limited" dmaengine: s3c24xx-dma: fix spelling mistake "to" -> "too" dmaengine: Move dma_get_{,any_}slave_channel() to private dmaengine.h dmaengine: Remove dma_request_slave_channel_compat() wrapper dmaengine: Remove dma_device_satisfies_mask() wrapper dt-bindings: fsl-imx-sdma: Add i.MX8MM/i.MX8MN/i.MX8MP compatible string dmaengine: zynqmp_dma: fix burst length configuration dmaengine: sun4i: Add support for cyclic requests with dedicated DMA dmaengine: fsl-qdma: fix duplicated argument to && ...

dmaengine: virt-dma: use vchan_vdesc_fini() to free descriptors

2019-12-26T04:34:18+00:00

vchan_dma_desc_free_list() basically open codes vchan_vdesc_fini() in its loop body. Call it directly rather than duplicating the code. Signed-off-by: Sascha Hauer Reviewed-by: Peter Ujfalusi Tested-by: Peter Ujfalusi Link: https://lore.kernel.org/r/20191216105328.15198-7-s.hauer@pengutronix.de Signed-off-by: Vinod Koul

dmaengine: virt-dma: Do not call desc_free() under a spin_lock

2019-12-26T04:34:18+00:00

vchan_vdesc_fini() shouldn't be called under a spin_lock. This is done in two places, once in vchan_terminate_vdesc() and once in vchan_synchronize(). Instead of freeing the vdesc right away, collect the aborted vdescs on a separate list and free them along with the other vdescs. The terminated descs are also freed in vchan_synchronize as done before this patch. Signed-off-by: Sascha Hauer Reviewed-by: Peter Ujfalusi Tested-by: Peter Ujfalusi Link: https://lore.kernel.org/r/20191216105328.15198-5-s.hauer@pengutronix.de Signed-off-by: Vinod Koul

dmaengine: virt-dma: remove debug message

2019-12-26T04:34:18+00:00

vchan_dma_desc_free_list() basically open codes vchan_vdesc_fini() in the loop body. One difference is an additional debug message. As this isn't overly useful remove it. Signed-off-by: Sascha Hauer Reviewed-by: Peter Ujfalusi Tested-by: Peter Ujfalusi Link: https://lore.kernel.org/r/20191216105328.15198-4-s.hauer@pengutronix.de Signed-off-by: Vinod Koul

dmaengine: virt-dma: Add missing locking

2019-12-26T04:34:18+00:00

Originally freeing descriptors was split into a locked and an unlocked part. The locked part in vchan_get_all_descriptors() collected all descriptors on a separate list_head. This was done to allow iterating over that new list in vchan_dma_desc_free_list() without a lock held. This became broken in 13bb26ae8850 ("dmaengine: virt-dma: don't always free descriptor upon completion"). With this commit vchan_dma_desc_free_list() no longer exclusively operates on the separate list, but starts to put descriptors which can be reused back on &vc->desc_allocated. This list operation should have been locked, but wasn't. In the mean time drivers started to call vchan_dma_desc_free_list() with their lock held so that we now have the situation that vchan_dma_desc_free_list() is called locked from some drivers and unlocked from others. To clean this up we have to do two things: 1. Add missing locking in vchan_dma_desc_free_list() 2. Make sure drivers call vchan_dma_desc_free_list() unlocked This needs to be done atomically, so in this patch the locking is added and all drivers are fixed. Signed-off-by: Sascha Hauer Reviewed-by: Peter Ujfalusi Tested-by: Peter Ujfalusi Reviewed-by: Green Wan Tested-by: Green Wan Link: https://lore.kernel.org/r/20191216105328.15198-3-s.hauer@pengutronix.de Signed-off-by: Vinod Koul

dmaengine: virt-dma: Fix access after free in vchan_complete()

2019-12-23T07:53:24+00:00

vchan_vdesc_fini() is freeing up 'vd' so the access to vd->tx_result is via already freed up memory. Move the vchan_vdesc_fini() after invoking the callback to avoid this. Fixes: 09d5b702b0f97 ("dmaengine: virt-dma: store result on dma descriptor") Signed-off-by: Peter Ujfalusi Reviewed-by: Alexandru Ardelean Link: https://lore.kernel.org/r/20191220131100.21804-1-peter.ujfalusi@ti.com Signed-off-by: Vinod Koul

Merge tag 'dmaengine-5.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma

2019-07-17T16:55:43+00:00

Pull dmaengine updates from Vinod Koul: - Add support in dmaengine core to do device node checks for DT devices and update bunch of drivers to use that and remove open coding from drivers - New driver/driver support for new hardware, namely: - MediaTek UART APDMA - Freescale i.mx7ulp edma2 - Synopsys eDMA IP core version 0 - Allwinner H6 DMA - Updates to axi-dma and support for interleaved cyclic transfers - Greg's debugfs return value check removals on drivers - Updates to stm32-dma, hsu, dw, pl330, tegra drivers * tag 'dmaengine-5.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (68 commits) dmaengine: Revert "dmaengine: fsl-edma: add i.mx7ulp edma2 version support" dmaengine: at_xdmac: check for non-empty xfers_list before invoking callback Documentation: dmaengine: clean up description of dmatest usage dmaengine: tegra210-adma: remove PM_CLK dependency dmaengine: fsl-edma: add i.mx7ulp edma2 version support dt-bindings: dma: fsl-edma: add new i.mx7ulp-edma dmaengine: fsl-edma-common: version check for v2 instead dmaengine: fsl-edma-common: move dmamux register to another single function dmaengine: fsl-edma: add drvdata for fsl-edma dmaengine: Revert "dmaengine: fsl-edma: support little endian for edma driver" dmaengine: rcar-dmac: Reject zero-length slave DMA requests dmaengine: dw: Enable iDMA 32-bit on Intel Elkhart Lake dmaengine: dw-edma: fix semicolon.cocci warnings dmaengine: sh: usb-dmac: Use [] to denote a flexible array member dmaengine: dmatest: timeout value of -1 should specify infinite wait dmaengine: dw: Distinguish ->remove() between DW and iDMA 32-bit dmaengine: fsl-edma: support little endian for edma driver dmaengine: hsu: Revert "set HSU_CH_MTSR to memory width" dmagengine: pl330: add code to get reset property dt-bindings: pl330: document the optional resets property ...

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19T15:09:55+00:00

Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Enrico Weigelt Reviewed-by: Kate Stewart Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman