search for: dmaengin

On Fri, Aug 26, 2016 at 03:56:40PM +0100, Peter Griffin wrote: > config STM32_DMA > bool "STMicroelectronics STM32 DMA support" > depends on ARCH_STM32 > @@ -567,7 +580,6 @@ config ZX_DMA > help > Support the DMA engine for ZTE ZX296702 platform devices. > > - unrelated change? > + fdev->chans = devm_kzalloc(&pdev->dev, > +

On Fri, Aug 26, 2016 at 03:56:40PM +0100, Peter Griffin wrote: > config STM32_DMA > bool "STMicroelectronics STM32 DMA support" > depends on ARCH_STM32 > @@ -567,7 +580,6 @@ config ZX_DMA > help > Support the DMA engine for ZTE ZX296702 platform devices. > > - unrelated change? > + fdev->chans = devm_kzalloc(&pdev->dev, > +

...mem) > + memcpy_toio(dst->vaddr_iomem, src, len); > + else > + memcpy(dst->vaddr, src, len); > +} Are these going to be really big memcpy() operations? Some platforms have DMA offload engines that can perform memcpy(), drivers/dma, include/linux/dmaengine.h especially if the CPU doesn't really need to touch the contents and flush caches etc. An example exist in some MTD drivers that move large quantities of data off flash memory like this: drivers/mtd/nand/raw/cadence-nand-controller.c Notice that DMAengine and DMAbuf does not have much in com...

Many DRM drivers implement an encoder with an empty implementation. This patchset adds drm_simple_encoder_init() and drm_simple_encoder_create(), which can be used by drivers instead. Except for the destroy callback, the simple encoder's implementation is empty. The patchset also converts 4 encoder instances to use the simple-encoder helpers. But there are at least 11 other drivers which can

...100644 drivers/dma/st_fdma.c diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index 739f797..5b5a341 100644 --- a/drivers/dma/Kconfig +++ b/drivers/dma/Kconfig @@ -437,6 +437,19 @@ config STE_DMA40 help Support for ST-Ericsson DMA40 controller +config ST_FDMA + tristate "ST FDMA dmaengine support" + depends on ARCH_STI + select ST_SLIM_REMOTEPROC + select DMA_ENGINE + select DMA_VIRTUAL_CHANNELS + help + Enable support for ST FDMA controller. + It supports 16 independent DMA channels, accepts up to 32 DMA requests + + Say Y here if you have such a chipset. + If unsure,...

...t > control > clocksource/drivers/sun5i: explicitly request exclusive reset control > crypto: rockchip: explicitly request exclusive reset control > crypto: sun4i-ss - request exclusive reset control > PM / devfreq: tegra: explicitly request exclusive reset control > dmaengine: stm32-dma: explicitly request exclusive reset control > dmaengine: sun6i: explicitly request exclusive reset control > dmaengine: tegra-apb: explicitly request exclusive reset control > drm: kirin: explicitly request exclusive reset control > drm/nouveau/tegra: explicitly requ...

...eally big memcpy() operations? Individually, each could be a scanline, so a few KiB. (4 bytes * horizontal resolution). Updating a full framebuffer can sum up to several MiB. > > Some platforms have DMA offload engines that can perform memcpy(),They could be > drivers/dma, include/linux/dmaengine.h > especially if the CPU doesn't really need to touch the contents > and flush caches etc. > An example exist in some MTD drivers that move large quantities of > data off flash memory like this: > drivers/mtd/nand/raw/cadence-nand-controller.c > > Notice that DMAengine a...

...; Individually, each could be a scanline, so a few KiB. (4 bytes * > horizontal resolution). Updating a full framebuffer can sum up to > several MiB. > > > > > Some platforms have DMA offload engines that can perform memcpy(),They could be > > drivers/dma, include/linux/dmaengine.h > > especially if the CPU doesn't really need to touch the contents > > and flush caches etc. > > An example exist in some MTD drivers that move large quantities of > > data off flash memory like this: > > drivers/mtd/nand/raw/cadence-nand-controller.c > >...

...licitly request exclusive reset control clocksource/drivers/sun5i: explicitly request exclusive reset control crypto: rockchip: explicitly request exclusive reset control crypto: sun4i-ss - request exclusive reset control PM / devfreq: tegra: explicitly request exclusive reset control dmaengine: stm32-dma: explicitly request exclusive reset control dmaengine: sun6i: explicitly request exclusive reset control dmaengine: tegra-apb: explicitly request exclusive reset control drm: kirin: explicitly request exclusive reset control drm/nouveau/tegra: explicitly request exclusive reset...

...code or the value 1? That seems sort of weird (I think "negative error code or *zero* is more typical), but maybe you're following some convention? > +#include <linux/pci-epf.h> > +#include <linux/pci-epc.h> > +#include <linux/vringh.h> > +#include <linux/dmaengine.h> Alpha order if possible > + /* Virtual address of pci configuration space */ s/pci/PCI/ > + /* Callback function and parameter for queue notifcation > + * Note: PCI EP function cannot detect qnotify accurately, therefore this > + * callback function should check all of virt...

On 2018?03?26? 08:01, syzbot wrote: > Hello, > > syzbot hit the following crash on upstream commit > cb6416592bc2a8b731dabcec0d63cda270764fc6 (Sun Mar 25 17:45:10 2018 +0000) > Merge tag 'dmaengine-fix-4.16-rc7' of > git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/slave-dma > syzbot dashboard link: > https://syzkaller.appspot.com/bug?extid=7f073540b1384a614e09 > > So far this crash happened 4 times on upstream. > C reproducer: https://syzkaller.appspot.com/x/repro...

...e st_fdma tristate (Paul) - Remove __exit tag from .remove (Maxime) - Update MAINTAINERS rule to fdma* (Lee) - Unit address should match reg property (Lee) Peter Griffin (18): remoteproc: st_slim_rproc: add a slimcore rproc driver MAINTAINERS: Add st slim core rproc driver to STi section. dmaengine: st_fdma: Add STMicroelectronics FDMA DT binding documentation dmaengine: st_fdma: Add STMicroelectronics FDMA driver header file dmaengine: st_fdma: Add STMicroelectronics FDMA engine driver support ARM: STi: DT: STiH407: Add FDMA driver dt nodes. MAINTAINERS: Add FDMA driver files to...

...e st_fdma tristate (Paul) - Remove __exit tag from .remove (Maxime) - Update MAINTAINERS rule to fdma* (Lee) - Unit address should match reg property (Lee) Peter Griffin (18): remoteproc: st_slim_rproc: add a slimcore rproc driver MAINTAINERS: Add st slim core rproc driver to STi section. dmaengine: st_fdma: Add STMicroelectronics FDMA DT binding documentation dmaengine: st_fdma: Add STMicroelectronics FDMA driver header file dmaengine: st_fdma: Add STMicroelectronics FDMA engine driver support ARM: STi: DT: STiH407: Add FDMA driver dt nodes. MAINTAINERS: Add FDMA driver files to...

PCIe endpoint framework provides APIs to implement PCIe endpoint function. This framework allows defining various PCIe endpoint function behaviors in software. This patch extend the framework for virtio pci device. The virtio is defined to communicate guest on virtual machine and host side. Advantage of the virtio is the efficiency of data transfer and the conciseness of implementation device

DRM's fbdev console uses regular load and store operations to update framebuffer memory. The bochs driver on sparc64 requires the use of I/O-specific load and store operations. We have a workaround, but need a long-term solution to the problem. This patchset changes GEM's vmap/vunmap interfaces to forward pointers of type struct dma_buf_map and updates the generic fbdev emulation to use

...SDFEC tristate "Xilinx SDFEC 16" diff --git a/drivers/mtd/nand/onenand/Kconfig b/drivers/mtd/nand/onenand/Kconfig index ae0b8fe5b990..ea382fc48432 100644 --- a/drivers/mtd/nand/onenand/Kconfig +++ b/drivers/mtd/nand/onenand/Kconfig @@ -33,12 +33,12 @@ config MTD_ONENAND_OMAP2 Enable dmaengine and gpiolib for better performance. config MTD_ONENAND_SAMSUNG - tristate "OneNAND on Samsung SOC controller support" - depends on ARCH_S3C64XX || ARCH_S5PV210 || ARCH_EXYNOS4 - help - Support for a OneNAND flash device connected to an Samsung SOC. -...

...SDFEC tristate "Xilinx SDFEC 16" diff --git a/drivers/mtd/nand/onenand/Kconfig b/drivers/mtd/nand/onenand/Kconfig index ae0b8fe5b990..ea382fc48432 100644 --- a/drivers/mtd/nand/onenand/Kconfig +++ b/drivers/mtd/nand/onenand/Kconfig @@ -33,12 +33,12 @@ config MTD_ONENAND_OMAP2 Enable dmaengine and gpiolib for better performance. config MTD_ONENAND_SAMSUNG - tristate "OneNAND on Samsung SOC controller support" - depends on ARCH_S3C64XX || ARCH_S5PV210 || ARCH_EXYNOS4 - help - Support for a OneNAND flash device connected to an Samsung SOC. -...