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path: root/drivers/dma/ioat/sysfs.c
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2019-06-05treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 291Thomas Gleixner1-13/+1
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details the full gnu general public license is included in this distribution in the file called copying this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope [that] it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details the full gnu general public license is included in this distribution in the file called copying extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 57 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141901.515993066@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-08-23dmaengine: ioatdma: Add intr_coalesce sysfs entryUjjal Singh1-0/+42
We observed performance increase with DMA copy from memory to MMIO by changing the interrupt coalescing value to 0. The previous set value was projected on the C5xxx Xeon platform and no longer holds true. Removing hard coded value and providing a tune-able in sysfs in order to allow user to tune this on a per channel basis. By default this value will be set to 0. Example of sysfs variable importing for interrupt coalescing value from command line: echo 5> /sys/devices/pci0000:00/0000:00:04.0/dma/dma0chan0/ quickdata/intr_coalesce Reported-by: Nithin Sujir <nsujir@tintri.com> Signed-off-by: Ujjal Singh <ujjal.singh@intel.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-08-17dmaengine: ioatdma: move all sysfs related codeDave Jiang1-0/+135
Move and fixup all sysfs related bits to sysfs.c file. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Acked-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>